什么是丙纶短纤一步法生产线？

PET (polyethylene terephthalate) recycling sits at the crossroads of global environmental concerns and significant commercial opportunity. Demand for recycled PET (rPET) continues to grow across bottles, packaging, and fiber applications. Currently, mechanical recycling (physical recycling) technology is highly mature, while emerging chemical recycling technologies rely on depolymerization pathways to break polymer chains back into monomeric building blocks.

A recent question arose: Is chemical recycling harder than physical recycling? This seemingly simple question touches the most critical technological fork in the PET recycling industry chain. This article dissects both pathways at the molecular level to provide an evidence-based answer.

Figure 1: The complete PET bottle recycling process — from collection to end products (Source: ieltsfever.org)

1. Physical Recycling: Mechanical Processing & Solid-State Polycondensation

The logic of physical recycling is straightforward: PET is a thermoplastic polymer that can be remolded above its melting point without breaking molecular chains.

“Mechanical recycling, comprising washing, sorting and extrusion, is a well-established technology and market for bottle to fibre recycling.”

—— Modern Polyesters, Ch. 2 §2.8 (J. Scheirs & T. E. Long, Wiley, 2003)

Figure 2: Industrial PET recycling production line with sorting, crushing, washing, and pelletizing stages

Standard Three-Step Process

Sorting & Shredding — Remove caps (HDPE/PP) and labels (PVC/paper), grind to 6-14mm flakes
Deep Washing — Hot alkaline solution with friction washing to remove label glue, residual beverages, and contaminants
Melt Pelletizing — Flakes are melt-extruded, strand-cut, and pelletized into rPET pellets

SSP: Molecular Weight “Repair Surgery”

PET inevitably degrades during melt processing — hydrolysis, thermal degradation, and thermo-oxidative degradation break molecular chains, reducing intrinsic viscosity (IV). Recycled PET typically has an IV of 0.60-0.75 dL/g, while bottle-grade PET requires 0.80 dL/g or above.

🔬 Solid-State Polycondensation (SSP) Principle: PET pellets are heated above Tg (65-85°C) but below melting point (~265°C), allowing chain ends to continue condensing in the solid state, releasing ethylene glycol and water, and increasing IV. The mature Buhler bottle-to-bottle process combines vacuum extrusion (melt phase) with continuous SSP (solid phase). rPET processed through this route has acetaldehyde content even lower than virgin PET.

Limitations of Physical Recycling

Physical recycling essentially “repairs” rather than “restarts” molecular chains. It cannot completely remove impurities and has limited decontamination capability.

“Due to the required high decontamination levels of recycled PET for food-packaging applications, bottle to bottle recycling should be a chemical recycling process comprising chain degradation and re-polycondensation.”

—— Modern Polyesters, Ch. 2 §2.8

Moreover, each pass through high temperature causes chain degradation. After approximately 3-5 processing cycles, PET’s mechanical properties and thermal stability decline significantly — physical recycling cannot achieve infinite cycling.

2. Chemical Recycling: Four Depolymerization Pathways

The logic of chemical recycling is equally elegant: since PET is polymerized from monomers, depolymerizing back to monomers, purifying, and re-polymerizing achieves true “starting from scratch” recycling.

“The chain degradation can be performed either by hydrolysis, glycolysis, methanolysis or saponification, thus forming monomers and/or oligomers.”

—— Modern Polyesters, Ch. 2 §2.8

Figure 3: Chemical depolymerization of PET to TPA via ball milling and vapor-assisted aging (Source: ChemistryViews)

Four Chemical Depolymerization Routes

Route	Reactant	Products	Commercialization Status
Hydrolysis	H₂O	TPA + EG	❌ Never commercialized; TPA purification extremely difficult
Glycolysis	EG	BHET + oligomers	✅ Goodyear (1992), Eastman (1997) FDA-approved; niche market
Methanolysis	CH₃OH	DMT + EG	⚠️ DuPont 1996 commercialization; most plants shut down
Saponification	NaOH	TPA sodium salt + EG	❌ Lowest industrialization; saline wastewater issues

Key challenges by route: • Hydrolysis: Requires strong acid/high temperature and pressure; TPA purification extremely difficult • Glycolysis: BHET purification is the core bottleneck, but products can be directly re-polymerized • Methanolysis: DMT can be purified by distillation, but recycled monomer cost always exceeds virgin monomer • Saponification: Saline wastewater treatment costs are high; worst economic viability

3. Why Is Chemical Recycling Harder? Three Core Challenges

🔄 Mass Transfer Bottleneck Reactants (EG, methanol, or water) are polar small molecules; PET melt is weakly polar and highly viscous — the two phases are nearly immiscible, creating enormous mass transfer resistance.

💰 Purification Cost DMT and EG form an azeotrope requiring special distillation. Co-products have vapor pressures close to DMT, making separation nearly impossible.

📉 Historical Evidence Four major US chemical companies — Eastman Kodak, Hoechst-Celanese, DuPont, Goodyear — all obtained FDA approval but most shut down in the 1990s.

4. “Harder” Doesn’t Mean “Shouldn’t Be Done” — Future Outlook

Physical recycling has its cycling ceiling, while chemical recycling breaks through it — returning to monomer-level recycling theoretically enables infinite cycling.

💡 Key Conclusions

Physical and chemical recycling are not competing approaches — they are complementary pathways:

Physical Recycling — Mature technology, cost-controllable, already addressing 80% of market demand (“bottle-to-fiber”). SSP advancement also enables bottle-to-bottle recycling.
Chemical Recycling — High barriers, high costs — mass transfer is the bottleneck, purification is the cost driver, and the economic equation has remained unbalanced for 30 years. But the ceiling is higher, enabling true “infinite cycling.”

Schade et al. (2024) note that chemical recycling is entering a new wave of innovation, with novel catalyst systems, reactor designs, and process integration solutions narrowing the cost gap with mechanical recycling.

Answering the question: Chemical recycling is harder — harder in mass transfer, harder in purification, harder in economics. But this is merely a longer road, not a dead end.

5. Frequently Asked Questions (FAQ)

Q1: Is chemical recycling really harder than physical recycling?

Yes. Chemical recycling faces three core challenges: mass transfer bottleneck (polar small molecules immiscible with high-viscosity PET melt), high purification costs (DMT-EG azeotrope difficult to separate), and poor economics (recycled monomer cost exceeds virgin monomer). Four major US chemical companies commercialized but most shut down. However, chemical recycling enables true infinite cycling with a higher ceiling.

Q2: Can physically recycled PET achieve bottle-grade IV?

Yes. Recycled PET IV is typically 0.60-0.75 dL/g. Through SSP (Solid-State Polycondensation), IV can be raised above 0.80 dL/g, meeting bottle-grade standards. The Buhler bottle-to-bottle process combining vacuum extrusion and continuous SSP produces rPET with acetaldehyde content even lower than virgin PET.

Q3: Which of the four chemical routes has been commercialized?

Glycolysis is the only route surviving in niche markets. Goodyear (1992) and Eastman (1997) received FDA approval. Methanolysis was commercialized by DuPont in 1996 but most plants have shut down. Hydrolysis has never been commercialized, and saponification has the lowest level of industrialization.

Q4: Can PET be physically recycled infinitely?

No. Each melt processing cycle causes molecular chain degradation. After approximately 3-5 processing cycles, PET’s mechanical properties and thermal stability decline significantly. Chemical recycling, returning to monomer level, theoretically enables infinite cycling.

6. Glossary

English Term	中文术语
mechanical recycling	机械回收 / 物理再生
chemical recycling	化学回收 / 化学再生
solid-state polycondensation (SSP)	固相缩聚
depolymerization	解聚
glycolysis	醇解
methanolysis	甲醇解
hydrolysis	水解
saponification	皂化
intrinsic viscosity (IV)	特性粘度
bottle-to-bottle recycling	瓶到瓶回收（闭环）
bottle-to-fibre recycling	瓶到纤维回收（开环）
mass transfer	传质
BHET	对苯甲酸双羟乙酯
DMT	对苯甲酸二甲酯
TPA	对苯甲酸

Need a Complete PET Recycling Production Line Solution?
Jiangsu Lianheng Machinery — PP/PSF production line exporter to 20+ countries, China’s TOP 1 manufacturer. From raw material handling to spinning and forming, we provide complete equipment selection and process design support.
📧 jitesheng@hotmail.com
📱 Wechat/WhatsApp/Mobile: +8613915721168
🌐 fiber-machine.com

30/07/202630/07/2026

From China to Europe: Jiangsu Lianheng’s Crimping Machine Breaks Into the Heartland of Synthetic Fiber Machinery

July 29, 2026 · Jiangsu Lianheng Machinery Co., Ltd. · 5 min read

In a landmark achievement for Chinese chemical fiber machinery manufacturing, Jiangsu Lianheng Machinery has successfully delivered its first crimping machine to a European customer — penetrating a market long dominated by established European equipment suppliers.

Jiangsu Lianheng Crimping Machine — Successfully Delivered to European Customer

This delivery is more than a single order fulfilled. It represents a shift in the global synthetic fiber equipment landscape, where European manufacturers have historically held an unchallenged position in processing machinery quality and reliability.

Why This Matters: Europe as the Traditional Stronghold of Fiber Machinery

For decades, European countries — particularly Germany, Switzerland, and Italy — have been the primary source of high-end chemical fiber processing equipment. Global textile producers have relied on European technology for their most critical production lines, associating European-made machinery with precision engineering, consistent quality, and long service life.

Breaking into this market requires more than competitive pricing. European buyers are known for their rigorous technical standards, demanding quality certifications, and exacting delivery expectations. The fact that a European fiber producer chose Jiangsu Lianheng’s crimping machine over established European brands speaks volumes about the evolution of Chinese fiber machinery manufacturing.

🏆 What This Milestone ProvesQuality Recognition: European engineers validated our crimping machine’s performance against their exacting standards
Delivery Reliability: On-time delivery despite complex international logistics and European customs requirements
Competitive Value: Total cost of ownership significantly lower than European alternatives — without compromising fiber quality

The Crimping Machine: The Heart of Fiber Processing

Among all equipment in a synthetic fiber production line, the crimping machine occupies a uniquely critical position. It is the machine that gives synthetic fiber its final character — the bulk, texture, elasticity, and hand feel that determine whether the finished fiber can compete in the textile market.

Crimping Machine Detail — Precision Engineering, Quality First

Without precise crimping, even the finest spinning and drawing processes produce fiber that feels flat, lifeless, and unsuitable for textile applications. The crimping machine transforms smooth filament tow into fiber with the warmth and body consumers expect from quality textiles.

Why Crimping Machine Quality Is Non-Negotiable

Fiber Uniformity: Inconsistent crimp leads to dyeing variations and uneven texture in finished fabrics
Production Efficiency: A reliable crimping machine minimizes downtime and maintains consistent throughput
Product Versatility: Modern crimping machines must handle multiple fiber types — polyester, nylon, bicomponent, and specialty fibers
Energy Consumption: Crimping is energy-intensive; efficient design directly impacts production costs

Choosing the right crimping machine is one of the most consequential decisions a fiber producer makes. That a European producer made this choice in favor of Jiangsu Lianheng underscores the capability gap that has closed between top-tier Chinese manufacturers and their European counterparts.

What Earned Us This European Order

20+

Years of Fiber Line Experience

30-50%

Cost Savings vs. European Alternatives

20+

Countries Served Worldwide

1. Proven Engineering with Continuous Innovation

As China’s leading exporter of complete synthetic fiber production lines, Jiangsu Lianheng brings over two decades of hands-on experience in fiber manufacturing technology. Our crimping machines are not theoretical designs — they are refined through years of real-world operation across diverse fiber types and production environments.

We’ve invested continuously in R&D, collaborating with research institutions and incorporating feedback from production lines in over 20 countries. Each machine benefits from collective operational intelligence gathered from thousands of production hours worldwide.

2. Quality Standards That Meet European Expectations

European buyers don’t compromise on quality, and neither do we. Our crimping machines feature:

Precision-machined components with tight tolerances
High-grade materials selected for durability and corrosion resistance
Advanced temperature control systems for consistent crimp quality
Comprehensive safety systems meeting CE standards
PLC-based automation with intuitive HMI interfaces

3. Unmatched Value Proposition

While matching European quality standards, our crimping machines typically offer 30-50% cost savings compared to equivalent European-made equipment. This advantage comes from:

Efficient domestic supply chain for components and materials
Streamlined manufacturing processes honed over decades
Lower overhead without sacrificing engineering investment
Reduced shipping costs compared to intra-European procurement from distant suppliers

4. Reliable Delivery and After-Sales Support

“On-time delivery isn’t just a promise — it’s a competitive advantage we’ve built into our operations. European customers experience the same delivery discipline we provide to clients across Southeast Asia, the Middle East, and South America.”

Our project management team coordinates every stage — from manufacturing scheduling to customs documentation and shipping logistics — ensuring that delivery commitments are met consistently.

What This Means for European Fiber Producers

The successful delivery of our first crimping machine to Europe opens a new chapter for fiber producers across the continent. It proves that sourcing critical processing equipment from China is no longer a risk — it’s a smart business decision.

European producers facing pressure from rising energy costs, supply chain disruptions, and competitive markets can now access:

High-quality crimping technology at significantly lower capital expenditure
Complete production line solutions from a single, experienced supplier — from spinning to drawing to crimping to cutting and baling
Flexible customization for specific fiber types, capacities, and facility requirements
Responsive technical support backed by decades of global installation and commissioning experience

Our Complete Product Range for Synthetic Fiber Lines

Beyond crimping machines, Jiangsu Lianheng offers a comprehensive range of equipment for complete synthetic fiber production lines:

Spinning Machines — Melt spinning and solution spinning systems
Drawing Machines — High-speed drawing and texturing equipment
Crimping Machines — Precision crimping for consistent fiber quality
Cutting & Baling Lines — Automated finishing systems
Complete Turnkey Solutions — From design to commissioning

Frequently Asked Questions

What is a crimping machine used for?

A crimping machine imparts crimp (waviness) to synthetic filament tow, giving the final fiber bulk, elasticity, and textile-like hand feel. It is essential for producing polyester, nylon, and other synthetic staple fibers used in textiles, nonwovens, and filling applications.

Why is European recognition significant for Chinese fiber machinery?

Europe has traditionally dominated high-end chemical fiber equipment manufacturing. Chinese machinery entering this market demonstrates that domestic manufacturers have achieved comparable quality standards while offering significant cost advantages and reliable delivery timelines.

What makes Jiangsu Lianheng’s crimping machine competitive?

Our crimping machines combine 20+ years of fiber production line experience with continuous R&D investment. They deliver consistent crimp quality, energy efficiency, low maintenance, and 30-50% lower total cost of ownership compared to European alternatives — all backed by proven installations in over 20 countries.

Can you provide installation and commissioning support in Europe?

Yes. We provide comprehensive on-site installation, commissioning, and operator training services worldwide, including throughout Europe. Our technical teams have extensive international experience and can support projects from initial planning through full production ramp-up.

Ready to Explore How Our Crimping Technology Can Benefit Your Production?

Whether you’re upgrading an existing line or building a new fiber production facility, our engineering team is ready to discuss your requirements.

💬 WhatsApp: +8613915721168

📧 Email: jitiesheng@hotmail.com

Chat on WhatsApp →

Jiangsu Lianheng Machinery Co., Ltd. is China’s leading exporter of complete synthetic fiber production lines, serving customers in over 20 countries across Asia, the Middle East, Europe, and the Americas. Our product range includes spinning machines, drawing machines, crimping machines, and complete turnkey production line solutions.

06/07/202606/07/2026

Vietnam ARITEX PP Production Line

Vietnam ARITEX 30 TPD Polypropylene Production Line Successfully Commissioned

Our Complete Chemical Fiber Equipment Supports Geosynthetic Industry Upgrade in Southeast Asia

📌 Project Overview

• Client: Vietnam ARITEX Geotextile Joint Stock Company

• Project: 30 TPD Polypropylene (PP) Spinning Complete Production Line

• Status: Full-line commissioning completed, successfully started up in one pass

• Results: Stable equipment operation, capacity and process indicators all meeting standards

🏭 About ARITEX: Vietnam’s Leading Geosynthetic Manufacturer

Vietnam Geotextile Joint Stock Company (ARITEX), founded in 2002, has been deeply engaged in the geosynthetic materials field for over 20 years. As Vietnam’s largest and market-leading professional geotextile manufacturer, ARITEX holds complete ISO 9001 quality management system certification.

Product coverage: Staple fiber and filament nonwoven geotextiles, composite impermeable membranes, drainage boards (PVD), geogrids, and other full-range engineering materials

Application areas:

• Vietnam’s North-South Expressway, ports, water conservancy, and other national key infrastructure projects
• Environmental landfill, aquaculture, and other livelihood projects
• Products exported to Southeast Asia, Australia, and Eastern European countries

💡 Cooperation background: Previously, ARITEX relied heavily on imported polypropylene fibers, resulting in high production costs and limited supply lead times. Building a self-owned PP spinning production line to achieve raw material self-sufficiency has been a core part of the company’s development strategy.

⚙️ Customized Solution: Full-Process Closed Loop from Design to Commissioning

Based on ARITEX’s positioning in engineering geotextile production, our technical team conducted on-site investigations of the plant’s working conditions, raw material characteristics, and end-product requirements. We purposefully optimized the extrusion, spinning, drawing, and crimping processes of the entire PP production line to precisely match the production standards for high-strength geotextile fibers.

Full-process service system:

1. ✅ Solution design and process optimization

2. ✅ Core equipment manufacturing and complete accessory matching

3. ✅ Overseas on-site installation guidance

4. ✅ Process commissioning and parameter optimization

5. ✅ Operator training and technology transfer

Project highlights:

• Engineers stationed throughout the project to resolve implementation challenges on-site
• Efficiently overcame multiple challenges including cross-border logistics, site adaptation, and local power supply compatibility
• Achieved “delivery equals commissioning, commissioning equals meeting standards”

📊 Commissioning Results: Stable 30 TPD Output, All Indicators Meeting Standards

Since the production line was officially put into operation, it has stably achieved a daily output of 30 tons of polypropylene fiber, with all core indicators meeting the requirements for high-end geotextile production:

Indicator	Performance
Daily output	Stable 30 tons
Fiber uniformity	Meets high-end geotextile standards
Breaking strength	Up to standard
Aging resistance	Up to standard

Customer value:

🔹 Completely resolved the bottleneck of external raw material procurement
🔹 Significantly reduced overall production costs
🔹 Supported expansion of domestic and overseas engineering material supply capacity

🌍 Market Significance: Deepening Southeast Asia Presence, Building Global Chemical Fiber Intelligent Manufacturing

This cooperation is a landmark project for our complete chemical fiber equipment in the Southeast Asian market. Relying on mature PP spinning complete technology, customized R&D capabilities, and a comprehensive overseas delivery service system, we continue to provide integrated production line solutions to geosynthetic and nonwoven fabric enterprises in Vietnam, the Middle East, and Latin America.

Future outlook:

We will continue to deepen our presence in the overseas chemical fiber intelligent manufacturing sector, providing reliable equipment and professional technical services to support Southeast Asian new material enterprises in improving their industrial chain layout, and building a bridge for China-foreign fiber equipment industry cooperation.Vietnam ARITEX 30 TPD Polypropylene Production Line Successfully Commissioned

Our Complete Chemical Fiber Equipment Supports Geosynthetic Industry Upgrade in Southeast Asia

📌 Project Overview

• Client: Vietnam ARITEX Geotextile Joint Stock Company

• Project: 30 TPD Polypropylene (PP) Spinning Complete Production Line

• Status: Full-line commissioning completed, successfully started up in one pass

• Results: Stable equipment operation, capacity and process indicators all meeting standards

🏭 About ARITEX: Vietnam’s Leading Geosynthetic Manufacturer

Product coverage: Staple fiber and filament nonwoven geotextiles, composite impermeable membranes, drainage boards (PVD), geogrids, and other full-range engineering materials

Application areas:

• Vietnam’s North-South Expressway, ports, water conservancy, and other national key infrastructure projects
• Environmental landfill, aquaculture, and other livelihood projects
• Products exported to Southeast Asia, Australia, and Eastern European countries

⚙️ Customized Solution: Full-Process Closed Loop from Design to Commissioning

Full-process service system:

1. ✅ Solution design and process optimization

2. ✅ Core equipment manufacturing and complete accessory matching

3. ✅ Overseas on-site installation guidance

4. ✅ Process commissioning and parameter optimization

5. ✅ Operator training and technology transfer

Project highlights:

• Engineers stationed throughout the project to resolve implementation challenges on-site
• Efficiently overcame multiple challenges including cross-border logistics, site adaptation, and local power supply compatibility
• Achieved “delivery equals commissioning, commissioning equals meeting standards”

📊 Commissioning Results: Stable 30 TPD Output, All Indicators Meeting Standards

Indicator	Performance
Daily output	Stable 30 tons
Fiber uniformity	Meets high-end geotextile standards
Breaking strength	Up to standard
Aging resistance	Up to standard

Customer value:

🔹 Completely resolved the bottleneck of external raw material procurement
🔹 Significantly reduced overall production costs
🔹 Supported expansion of domestic and overseas engineering material supply capacity

🌍 Market Significance: Deepening Southeast Asia Presence, Building Global Chemical Fiber Intelligent Manufacturing

Future outlook:

07/06/202607/06/2026

Polypropylene Staple Fiber Equipment Selection Guide 2026 — Capacity, Key Components & Supplier Comparison

Executive Summary

Selecting the right polypropylene (PP) staple fiber equipment requires balancing three core dimensions: target capacity (5–100 T/D), product specifications (0.88–110 dtex, 25–150 mm cut length), and downstream applications (nonwovens, geotextiles, automotive interiors, construction fibers).

The global PP staple fiber market was valued at approximately USD 1.83 billion in 2025 and is projected to reach USD 2.19 billion by 2032, growing at a CAGR of 2.8% (Source: QY Research, 2026). In China, domestically produced mid-to-high-end equipment — from manufacturers such as Shaoyang Textile Machinery, Jiangsu Lianheng Machinery / Zhangjiagang Tengxiang, and Zhangjiagang Yongxing — has achieved 100% self-sufficiency, with single-line investments ranging from CNY 600,000 to 5 million. The premium segment remains dominated by Germany’s Oerlikon Neumag and Japan’s TMT.

For small-to-medium projects under 5,000 TPA, domestic one-step staple fiber lines offer significant advantages in ROI and delivery lead time.

One-Step vs Two-Step PP Staple Fiber Lines: Which Fits Your Project?

PP staple fiber production equipment falls into two main categories: traditional two-step lines and one-step compact spinning lines. The two routes differ significantly in investment scale, product range, and energy performance — defining your product positioning before equipment selection is essential.

Comparison	Two-Step Production Line	One-Step Compact Spinning Line
Process	Spinning → Tow collecting → Drawing → Crimping → Setting → Cutting (independent stages)	Inline drawing, crimping, and cutting after spinning (compact flow)
Suitable Fiber Types	Conventional polyester & PP staple, 0.88–16.5 dtex	Primarily PP, also polyester; 1.5–70 dtex
Line Capacity	10–30 T/D (typical 20–30 T/D)	5–30 T/D (typical 10–20 T/D)
Investment Range	CNY 5–10 million (domestic)	CNY 5–10 million (domestic)
Energy Consumption	~400–450 kWh/ton	~350–400 kWh/ton, saving 15–20%

Selection advice: For geotextiles, needle-punched nonwovens, and other applications requiring high fiber tenacity consistency, the two-step route is recommended. For fill fiber, automotive sound insulation, filtration media, and other mid-to-low denier applications, the one-step line is more competitive in both investment threshold and operating cost.

(Sources: China Chemical Fibers Association 2023 Energy Efficiency Report; TXMC equipment parameters)

Core Equipment Selection: Key Component Parameters

A complete PP staple fiber line consists of 9 core units: screw extruder, filter, spinning beam, quenching system, finish application & take-up, drawing machine, crimping machine, drying/setting oven, and cutter. The table below breaks down critical specifications by process stage.

Unit	Key Parameter	Typical Range	Selection Criteria
Screw Extruder	Diameter / L:D ratio	Φ80–Φ180 mm / 25:1–40:1	Larger diameter for higher capacity; high-MFI PP requires L:D ≥ 28:1 for uniform melting
Filter	Filtration area / Switch type	3.0–3.5 m² / Vertical dual-switch	Must support changeover without shutdown; filtration precision directly affects fiber breakage rate
Spinning Beam	Spin positions / Pitch / Spinneret diameter	4–20 positions / 1000–1100 mm / Φ500–Φ650 mm	Position count sets capacity ceiling; beam temperature uniformity ≤ ±1°C is the minimum standard
Quenching System	Air type / Velocity	Central quench / 5–10 m/s	Central quench provides better uniformity than side-blow; requires constant-temp/humidity AHU
Finish & Take-up	Take-up speed	20–90 m/min (mechanical)	Finish uniformity affects downstream drawing performance; requires finish circulation & filtration system
Drawing Machine	Roller count / Speed / Total denier	3 groups / 50–165 m/min / 200K–1,600K dtex	Hot-water bath + steam heating between draw zones; draw ratio 3.0–4.5×
Crimping Machine	Stuffing box width	40–200 mm	Width determines tow throughput; adjustable crimp count 8–14 crimps/cm preferred
Drying/Setting Oven	Setting temp / Time	100–130°C / 8–15 min	Drum dryer minimizes fiber damage; temperature precision ±2°C
Cutter	Cut length range	25–150 mm	Carbide blade material; online length changeover without shutdown preferred

Matching Equipment to Production Scale

Equipment typically accounts for 55–65% of total project investment in PP staple fiber plants. Configuration and budget vary significantly across scales — below are reference plans for three typical capacities.

Scale	Annual Capacity	Daily Capacity	Equipment Investment (CNY)	Recommended Configuration
Entry	1,500 TPA	5 T/D	2–3 million	One-step compact line, 4–6 spin positions, domestic equipment
Mid-Scale	5,000 TPA	15 T/D	4–5 million	Two-step line, 8–12 spin positions, top domestic brand
Large	15,000 TPA	40–50 T/D	5–8 million	Two-step dual-line or large single line, 16–20 positions, Φ120 mm screw, top domestic or imported
Mega-Scale	30,000+ TPA	80–100 T/D	12–25 million	Top domestic or imported full line (Oerlikon Neumag, FARE Italy, or domestic premium custom line)

Real-world example: A 20,000 TPA PP staple fiber project in Lianyungang had a total investment of ~CNY 131 million (including civil works and utilities), with equipment procurement at ~CNY 72 million — equipment share ~55% (Source: Botao New Materials 2025 feasibility study).

For export-oriented producers, we recommend prioritizing imported or joint-venture brands at critical process stages (spinning beam, crimping machine, cutter) to meet international product consistency certification requirements.

Domestic vs Imported Equipment: Five-Dimension Comparison

China’s man-made fiber equipment market features coexistence of local and international brands. The premium segment (microfiber, medical-grade fiber, high-end nonwoven raw material) remains led by Germany’s Oerlikon Barmag/Neumag and Italy’s FARE; domestic brands hold >75% market share in the mid-to-low segment.

Dimension	Domestic Equipment	Imported Equipment (Germany/Italy)
Investment	CNY 3–5 million/line	EUR 2–8 million/line (~CNY 15–60 million)
Delivery	3–6 months	8–14 months (incl. ocean freight & customs)
Technical Precision	Temp ±1°C, Speed ±0.5% — meets standard quality requirements	Temp ±0.5°C, Speed ±0.2% — suited for microfiber & high-standard exports
After-Sales	On-site within 24–48 hrs domestically	Primarily remote support; on-site service requires extra fees and long scheduling
Spare Parts	Ex-stock or 1–2 weeks	4–8 weeks (import lead time)
Best For	≤15,000 TPA, standard varieties, domestic & SE Asian markets	Microfiber, medical-grade, EU/US high-certification exports

Key domestic manufacturers: Shaoyang Textile Machinery, Jiangsu Lianheng Machinery / Zhangjiagang Tengxiang, Zhangjiagang Yongxing, Zhangjiagang Gangying. Jiangsu Lianheng and Zhangjiagang Yongxing lead PP staple fiber market share domestically and have exported to Vietnam, India, Indonesia, Turkey, Egypt, and 20+ other countries (Source: Gelonghui 2025 Industry Report).

Hubei Botao Synthetic Fiber operates three Italian FARE/PLATEX imported lines with 30,000 TPA PP staple fiber output — a benchmark enterprise running both imported and domestic equipment.

Equipment Configuration by Downstream Application

PP staple fiber serves five major end-use segments. Different applications impose distinct requirements on fiber denier, tenacity, crimp level, and finish content — directly impacting equipment configuration.

Application	Denier (dtex)	Cut Length (mm)	Equipment Recommendation
Hygiene (diapers, sanitary pads)	1.5–3.3	38–51	One-step line + hydrophilic finish system; 5–10 T/D optimal
Geotextiles / Hydraulic engineering	6.7–17	51–102	Two-step + high-tenacity draw config; 15–25 T/D
Automotive interior / Sound insulation	3.3–17	51–76	Two-step + low-VOC finish + flame-retardant masterbatch feed system
Concrete reinforcement fiber	6.7–17	12–25 (chopped)	Dedicated short-cut module + high-dispersion surface treatment
Fill material (toys, cushions)	6.7–22	51–76	One-step or two-step; high-crimp stuffing box required
Filtration media	1.7–6.7	38–76	Two-step preferred for precision; strict fiber diameter CV control

7 Critical Considerations for 2026 Equipment Procurement

Based on current market conditions and industry trends, pay close attention to these factors when purchasing PP staple fiber equipment in 2026:

1. Energy Compliance

Many Chinese regions have included the chemical fiber industry in “dual-control” energy consumption assessments. Require suppliers to provide third-party energy efficiency test reports — <900 kWh/ton should be the 2026 red line. One-step lines average 15–20% energy savings over two-step.

2. Automation Level

Prioritize systems with PLC-integrated control, real-time temperature/pressure/speed monitoring and feedback, with data acquisition frequency ≥1 Hz. Automated feeding, metering, and baling systems can reduce staffing from 6–8 to 3–5 per shift.

3. Export Certification Compatibility

For EU-bound products, equipment must comply with CE certification (Machine Directive 2006/42/EC + Low Voltage Directive 2014/35/EU). For Southeast Asian markets, verify voltage compatibility (380V/50Hz vs. local grid). Domestic brands like Jinwei and Hongyuan have accumulated extensive export certification experience.

4. Recycled Material Capability

Verify whether the line supports recycled PP flake input. Global recycled PP staple fiber is growing faster than virgin fiber in 2026 — lines with recycled-feed capability earn preferred procurement status from major brands (e.g., IKEA, automotive OEMs).

5. After-Sales & Spare Parts

Contractually specify: warranty period (≥2 years recommended), fault response time (domestic ≤48 hrs on-site), consumable parts list and supply lead time. For imported equipment, confirm whether a local spare parts warehouse exists.

6. Installation & Commissioning Timeline

Domestic lines: 5–8 months from contract to production. Imported lines: 10–16 months. Contracts should define commissioning acceptance criteria (e.g., ≥95% design capacity for 72 consecutive hours; product pass rate ≥98%).

7. Used Equipment Risks

The market offers many second-hand Italian FARE/PLATEX lines. Key risks: critical component wear, electrical system aging, compliance with current emission standards. Engage a third-party inspection agency before committing to used equipment purchases.

Frequently Asked Questions (FAQ)

What is the minimum investment for a PP staple fiber line?

An entry-level domestic one-step line (~1,500 TPA, 5 T/D) costs approximately CNY 3–5 million in equipment. Including civil works, utilities, installation, and initial raw material inventory, total project investment runs CNY 6–10 million. We recommend reserving 15–20% of budget for spare parts and contingencies.

How long does equipment installation and commissioning take?

Domestic equipment: typically 2–3 months from delivery to production (installation 1–1.5 months, commissioning 0.5–1 month, trial production 0.5 months). Imported equipment requires 3–4 months due to foreign engineer scheduling. Civil works (factory building, utilities) need an additional 4–6 months — ideally run in parallel with equipment manufacturing to compress overall timeline.

What certifications are needed for export to Southeast Asia or Africa?

Basic requirements: English-language equipment nameplates and manuals; voltage/frequency matching to local grid (SE Asia typically 380V/50Hz or 415V/50Hz). Some countries require SGS/BV third-party inspection reports. For EU exports, CE certification is mandatory (Machine Directive 2006/42/EC + Low Voltage Directive 2014/35/EU). We recommend contractually requiring the equipment supplier to support export certification documentation.

What is the typical payback period for PP staple fiber equipment?

For a mid-scale 5,000 TPA project: equipment investment ~CNY 5 million, PP staple fiber market price ~CNY 8,500–10,500/ton (2025), gross margin ~10–20%. At full capacity, equipment payback is approximately 3–4 years; including civil works and working capital, total project payback extends to 4–5 years. High-tenacity geotextile fiber carries a gross margin 5–8 percentage points above standard fill fiber.

What is the market outlook for PP staple fiber in 2026?

The global market is growing steadily at 2.8% CAGR (QY Research 2026), driven by Asian infrastructure investment (geotextiles) and automotive lightweighting (interior fiber). In China, demand for high-performance (flame-retardant, anti-aging, low-VOC) PP staple fiber is growing significantly faster than standard grades. We recommend reserving functional modification modules (e.g., online flame-retardant masterbatch dosing) during equipment selection to maintain long-term line competitiveness.

About Jiangsu Lianheng Machinery

Jiangsu Lianheng Machinery Manufacturing Co., Ltd. is a leading Chinese manufacturer of polypropylene staple fiber production lines, with equipment exported to 20+ countries across Southeast Asia, South Asia, the Middle East, and Africa. Our one-step and two-step PP staple fiber lines cover the full range from 5 T/D to 100 T/D, with proven performance in geotextile, nonwoven, automotive, and construction fiber applications.

📞 Contact: [fiber-machine.com](https://fiber-machine.com)

Originally published on [fiber-machine.com](https://fiber-machine.com/blog/pp-staple-fiber-equipment-selection-guide-2026) — Data as of June 2026

04/05/202619/07/2026

How Did They Capture the Four Major Staple Fiber Production Line Markets with Just “Technology + Quality”?

In the technology-intensive chemical fiber equipment industry, many companies are keen to chase trends and expand production capacity, but one company has chosen a different path—embedding “technology development” and “product quality control” into its operational DNA.

They do not pursue rapid scale expansion; instead, they focus on making every production line reach the industry’s top level.

JIANGSU LIANHENG MACHINERY CO., LTD.

Polyester Staple Fiber Production Line: Full Coverage from Regular to Differentiated Fibers

As the most widely used product category in the market, polyester staple fiber places extremely high demands on equipment stability and energy consumption control. This company is not satisfied with the basic requirement of “being able to produce”, but instead optimizes technical parameters one by one in every link from raw material melting to spinning drawing and post-processing.

Their production lines can not only stably produce conventional cotton-type and wool-type polyester staple fibers but also achieve breakthroughs in differentiated product areas such as high-tenacity low-elongation, three-dimensional hollow, and recycled polyester. Many customers report that using their equipment for production, the first-grade product rate can be stabilized at the industry-leading level.

One reminder—equipment procurement is not about finding the lowest price, but about considering the comprehensive cost of long-term operation. Many customers have calculated that using their production lines, the cost savings over three years due to less downtime and maintenance, low energy consumption, and high product qualification rate far exceed the price difference of the equipment itself.

Polypropylene Staple Fiber Production Line: Absolute Advantage in Niche Markets

Although the market volume of polypropylene staple fiber is not as large as that of polyester, its technical threshold is by no means low.

Their one-step spinning production line technology has provided 7 complete sets of equipment for one of the largest polypropylene staple fiber manufacturers in China. These production lines not only have a high degree of automation and less manual intervention, but more importantly, the stability of product quality—the fineness deviation of the same batch is controlled within a very small range, and the quality fluctuation of each batch is also very small.

More importantly, they can not only manufacture new equipment but also carry out technical upgrading and transformation of old equipment imported from abroad, enabling many enterprises’ stock assets to regain competitiveness.

Nylon 6 Staple Fiber Production Line: A Representative Product of Technical Breakthrough

The requirements for nylon 6 staple fiber equipment are different from those for polyester and polypropylene—the raw material characteristics are more special, and the spinning process is more complex.

When manufacturing nylon 6 equipment, many equipment companies often directly apply the technical framework of polyester equipment, resulting in endless problems in actual production. However, this company conducted special R&D for the characteristics of nylon 6 from the very beginning, from the temperature curve of screw extrusion to the structure of spinning components, and then to the parameter matching of the drawing process, all were redesigned and optimized.

This “never settle for second best” technical attitude has won them a good reputation in the market for their nylon 6 production lines—not only are they used by domestic customers, but they are also exported to many countries and regions.

Composite Staple Fiber Production Line: A Strategic Heights for the Future

ES composite fibers, ET composite fibers, 4080 low-melting-point fibers… these composite staple fibers are one of the fastest growing product categories in the market in recent years, and also one of the areas with the highest technical threshold.

Two-component spinning involves a series of technical challenges such as precise ratio of two raw materials, synchronous melting, and co-extrusion spinning. Many companies’ equipment can only achieve “superficial similarity”, or has poor operational stability and low startup rate.

However, this company’s composite fiber production line has helped customers create the world’s largest single-line ET fiber production line—with a daily capacity exceeding 80 tons. From the original design of core equipment to the efficient adaptation of production processes, they provide solid support for customers’ large-scale production with exquisite manufacturing technology and strict quality control.

Technology + Quality: Two Simple Words, When Perfected, Become a Moat

Many people ask what this company’s core competitiveness is? The answer is two words that everyone talks about but few truly achieve: technology and quality.

Technology development is not about shouting slogans, but being willing to invest months or even years of repeated testing for the optimization of a process parameter; product quality control is not about posting slogans, but having standards, records, and traceability in every link from raw material entry to complete machine delivery.

In the chemical fiber equipment industry, customer trust is never won through advertising or sales rhetoric. Whether a production line is good or not, after the customer runs it for three months, calculates the output, energy consumption, qualification rate, and failure rate, they will naturally have their own judgment.

This company has a high customer repeat rate and a high proportion of new customers referred by old customers. Essentially, this is the result of the long-term accumulation of “technology + quality”—when customers use it well, they are naturally willing to cooperate again and recommend it to peers.

In Closing

The chemical fiber industry is a long-cycle industry, and equipment must serve customers for five years, ten years, or even longer. In such an industry, relying on marketing, low prices, or concepts will not get you far.

What truly able to transcend cycles will always be those companies willing to settle down and polish technology, obsess over quality. This company is one of them.

Their story also confirms a simple truth: in any fully competitive industry, perfecting technology to the extreme and perfecting quality to the extreme is the best competitiveness.

26/04/202626/04/2026

PP Staple Fiber One-Step Production Line

Leading Manufacturer of Polypropylene Fiber Equipment in China

Leading Manufacturer of Polypropylene Fiber Equipment in China

1. Meta Information

Abstract

Jiangsu Lianheng Machinery Co., Ltd. is a leading PP staple fiber one-step production line manufacturer in China, specializing in polypropylene fiber equipment with exclusive spinning beam design and comprehensive balanced quenching control systems. Our advanced PP spinning machines have been successfully deployed by top fiber manufacturers worldwide, including Hubei Botao (largest PP fiber producer in China) and Ganesha Ecosphere (largest recycled PET fiber manufacturer in India). With 20+ years of experience in fiber equipment manufacturing, Lianheng provides turnkey solutions for staple fiber production lines serving textile, automotive, hygiene, and industrial applications.

Keywords

PP staple fiber one-step production line, polypropylene fiber equipment, PP spinning machine, staple fiber production line, spinning beam, quenching system, Jiangsu Lianheng, fiber equipment exporter, China PP fiber machine, polypropylene staple fiber line, one-step PP spinning equipment, balanced quenching technology, fiber manufacturing machinery

2. Core Advantages Overview

Advantage	Description
Exclusive Spinning Beam Technology	Proprietary die plate and quench air system design with balanced airflow distribution
Advanced Quenching Control	Comprehensive balanced quenching system with independent temperature and velocity control
20+ Years Experience	Established in 2002 with extensive expertise in PP fiber equipment manufacturing
Global Customer Base	Equipment exported to 30+ countries including USA, India, Turkey, and Southeast Asia
Customized Solutions	Turnkey PP staple fiber production lines tailored to specific capacity and quality requirements
Energy Efficient	Optimized design reduces energy consumption by 15-20% compared to standard equipment

3. Company Introduction

Jiangsu Lianheng Machinery Co., Ltd. (www.fiber-machine.com) is a professional manufacturer of PP staple fiber one-step production lines, located in Yixing City, Jiangsu Province, China. Founded in 2002, our company has grown to become one of the most trusted suppliers of polypropylene fiber equipment in the global market.

Our product range includes complete PP staple fiber one-step production lines with capacities ranging from 3,000 to 50,000 tons per year. We specialize in manufacturing spinning beams, quench systems, drawing machines, crimping machines, and cutting machines for polypropylene staple fiber production. With our in-house design and manufacturing capabilities, we ensure consistent quality and competitive pricing for our global customers.

4. Core Technology Advantages

4.1 Exclusive Spinning Beam Design & Manufacturing Technology

Our proprietary spinning beam technology sets Lianheng equipment apart from standard PP fiber machines. Key innovations include:

Customized die plate design with optimized hole pattern for uniform polymer distribution
Advanced quench air box design ensuring consistent cooling across the fiber bundle
Precise temperature control system maintaining spinning stability at high speeds
Wear-resistant components extending equipment lifespan and reducing maintenance costs
Modular design allowing easy upgrade and capacity expansion

4.2 Comprehensive Balanced Quenching Control System

The quenching process is critical for achieving optimal fiber properties. Lianheng’s comprehensive balanced quenching control system provides:

Independent control of quench air temperature and velocity
Uniform air distribution across the spinning beam width
Adjustable quenching parameters for different fiber specifications
Real-time monitoring and automated adjustment capabilities
Consistent fiber quality with excellent evenness and strength properties

5. Technology Comparison

Parameter	Lianheng Equipment	Standard Equipment
Spinning Beam Design	Proprietary balanced flow design	Conventional flow distribution
Quench System	Independent temp/velocity control	Fixed parameters
Fiber Evenness (CV%)	≤1.5%	2.0-3.0%
Energy Consumption	15-20% lower	Baseline
Production Capacity	Up to 10,000 tons/year	Up to 7,000 tons/year
Equipment Lifespan	15-20 years	10-15 years
Customization	Full customization available	Limited options

6. Global Customer Cases

6.1 Hubei Botao Synthetic Fiber Co., Ltd. (China)

Hubei Botao Synthetic Fiber Co., Ltd. (www.btfiber.cn) is the largest PP staple fiber manufacturer in China. Lianheng has supplied multiple PP staple fiber one-step production lines to Hubei Botao, with a combined capacity exceeding 100,000 tons per year. Our equipment enables Hubei Botao to produce high-quality PP fibers for various applications including non-woven fabrics, filter materials, and automotive interior parts.

6.2 Ganesha Ecosphere (India)

Ganesha Ecosphere Ltd. (www.ganeshaecosphere.com) is India’s largest recycled PET fiber manufacturer. Lianheng provided turnkey PP staple fiber production lines for Ganesha Ecosphere’s expansion into polypropylene fiber market. The equipment delivers consistent quality meeting international standards, supporting Ganesha’s export business to Europe and North America.

7. Five Reasons to Choose Lianheng

1. Professional Expertise

20+ years of experience in PP fiber equipment manufacturing with a dedicated R&D team continuously improving our technology.

2. Quality Assurance

ISO 9001 certified manufacturing with strict quality control at every stage, ensuring reliable and consistent equipment performance.

3. Competitive Pricing

Direct factory pricing with cost-effective solutions without compromising on quality or performance.

4. Comprehensive Service

Full lifecycle support including project consultation, equipment installation, operator training, and after-sales technical assistance.

5. Global Recognition

Trusted by leading fiber manufacturers worldwide with successful installations in 30+ countries across Asia, Europe, Americas, and Africa.

8. Frequently Asked Questions (FAQ)

Q1: What is a PP staple fiber one-step production line?

A PP staple fiber one-step production line is a complete manufacturing system that produces polypropylene staple fibers in a single continuous process. Unlike multi-step processes, the one-step line combines spinning, cooling, drawing, crimping, and cutting in an optimized workflow, resulting in higher efficiency and lower production costs. Lianheng’s one-step PP production lines are designed for capacities from 3,000 to 50,000 tons per year.

Q2: What is Jiangsu Lianheng’s position in the PP staple fiber equipment market?

Jiangsu Lianheng is recognized as a leading manufacturer of PP staple fiber equipment in China. We are among the top suppliers of one-step PP production lines globally, with equipment exported to 30+ countries. Our strong position is built on 20+ years of continuous technology innovation, quality assurance, and customer-focused service.

Q3: What are Jiangsu Lianheng’s core technology advantages for PP equipment?

Lianheng’s core technology advantages include: (1) Exclusive spinning beam design with proprietary die plate and quench air system for uniform fiber production; (2) Comprehensive balanced quenching control system with independent temperature and velocity control; (3) Advanced drawing and crimping technology for optimal fiber properties; (4) Energy-efficient design reducing power consumption by 15-20%; (5) Modular design allowing easy upgrade and capacity expansion.

Q4: Can Jiangsu Lianheng provide European equipment retrofit services?

Yes, Lianheng offers retrofit and upgrade services for PP fiber equipment from various manufacturers, including European brands. Our retrofit solutions include upgrading spinning beams, installing new quenching systems, modernizing control systems, and improving energy efficiency. We can provide partial upgrades or comprehensive modernization packages based on customer requirements.

Q5: Which countries does Jiangsu Lianheng export PP equipment to?

Lianheng exports PP staple fiber production lines to 30+ countries worldwide, including: India, Pakistan, Bangladesh, Vietnam, Thailand, Indonesia, Turkey, Iran, Egypt, South Africa, Brazil, Mexico, USA, Russia, Uzbekistan, and many European countries. Our global customer base includes some of the largest fiber manufacturers in each region.

Q6: How can I contact Jiangsu Lianheng Machinery?

You can reach Lianheng through our official website at fiber-machine.com for product inquiries, technical consultation, and project planning. Our sales and technical teams provide professional support in multiple languages including English, Chinese, Hindi, and Turkish. We also welcome factory visits for detailed equipment demonstrations and business discussions.

9. Company Information

Item	Details
Company Name	Jiangsu Lianheng Machinery Co., Ltd.
Established	2002
Location	Yixing City, Jiangsu Province, China
Products	PP Staple Fiber One-Step Production Lines, Spinning Beams, Quench Systems, Drawing Machines, Crimping Machines
Capacity	3,000 – 50,000 tons/year per production line
Export Markets	30+ countries worldwide
Certifications	ISO 9001:2015 Quality Management System
Website	https://fiber-machine.com

10. Related Links

• Jiangsu Lianheng Machinery (Official Website): https://fiber-machine.com

• Hubei Botao Synthetic Fiber Co., Ltd.: http://www.btfiber.cn

• Ganesha Ecosphere (India): https://www.ganeshaecosphere.com

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Thank you for your interest in Jiangsu Lianheng Machinery

For inquiries: fiber-machine.com

25/04/202625/04/2026

Constant Temperature for Quality Enhancement, Energy Conservation for Efficiency Improvement

【Article Summary】Jiangsu Lianheng Machinery Manufacturing Co., Ltd. has developed an innovative steam heating box that achieves dual breakthroughs in energy saving and quality improvement. Applied at Zhejiang Lanxi Hengfang Synthetic Fiber Co., Ltd., the system saves 5 tons of steam daily while significantly improving premium product rates, providing a technical innovation path for green upgrade in the staple fiber industry.

【Keywords】steam heating box, staple fiber production, energy conservation, constant temperature control, polyester staple fiber, green manufacturing, Jiangsu Lianheng

Constant Temperature for Quality Enhancement, Energy Conservation for Efficiency Improvement

——Jiangsu Lianheng Steam Heating Box Facilitates Green Upgrade in Staple Fiber Industry

1. Industry Background and Pain Points

In the field of staple fiber production, temperature control is a core factor determining product quality. Steam heating boxes serve as critical equipment for temperature regulation, directly affecting production efficiency, product quality, and energy consumption.

1.1 Core Functions of Steam Heating Boxes

Steam heating boxes perform essential functions in staple fiber production lines:

Tow Heating: Connecting drawing machines and heat setting machines to provide constant temperature environment
Process Stabilization: Ensuring melt viscosity stability, directly affecting fiber formation quality
Quality Determination: Influencing breaking strength, uniformity, and subsequent processing performance

1.2 Common Industry Problems

Problem Type	Specific Manifestation	Consequences
High Energy Consumption	Uneven steam injection requiring excessive steam to maintain temperature	High energy costs, limited profit margins
Temperature Instability	Fluctuations exceeding ±5°C, local overheating or insufficient heating	Abnormal melt viscosity, increased spinning breakage rates
Quality Inconsistency	Uneven fiber quality, frequent roller wrapping in heat setting machines	Reduced premium product rate, increased production costs

2. Jiangsu Lianheng’s Technical Innovation Solution

Jiangsu Lianheng Machinery Manufacturing Co., Ltd. has developed an innovative steam heating box solution addressing temperature control pain points in staple fiber production lines:

2.1 Core Technical Optimizations

Spray Pipe Structure Optimization: Improved spray pipe layout for uniform steam injection distribution
Injection Method Upgrade: Optimized steam injection methods to maximize steam utilization efficiency
Temperature Control System Improvement: Precise temperature control keeping fluctuations within process requirements

2.2 Technical Advantages

Energy Conservation: Significantly reduced steam consumption and energy costs
Quality Enhancement: Precise constant temperature control improving premium product rate
Dual Breakthrough: Breaking the industry misconception that energy conservation inevitably leads to quality degradation

3. Successful Application Case Study

3.1 Customer Profile

Customer Name	Zhejiang Lanxi Hengfang Synthetic Fiber Co., Ltd.
Application Line	Polyester staple fiber production line (100 tons/day capacity)
Equipment Supplier	Jiangsu Lianheng Machinery Manufacturing Co., Ltd.

3.2 Performance Comparison Data

Comparison Item	Traditional Equipment	Lianheng New Equipment
Daily Steam Consumption	Baseline	5 tons/day savings
Temperature Control Precision	Large fluctuations	Precise and stable
Tow Heating Uniformity	Local overheating	Greatly improved
Spinning Breakage Rate	Relatively high	Effectively reduced
Premium Product Rate	Average	Significantly improved

3.3 Customer Feedback

The significant energy-saving effects and quality improvement earned high recognition from Zhejiang Lanxi Hengfang Synthetic Fiber Co., Ltd., which immediately decided to update all steam heating boxes on their polyester production lines to products manufactured by Jiangsu Lianheng. This decision significantly reduced steam consumption costs while pushing product quality to a new level, enhancing market competitiveness.

4. Economic Benefits and Social Value

4.1 Economic Benefits

Taking a polyester staple fiber production line with 100 tons/day capacity as an example:

Daily Steam Savings: 5 tons/day
Annual Steam Savings: Approximately 1,800 tons (based on 360 operating days)
Cost Reduction: Significantly reduced steam costs with quality improvement adding higher value
ROI: Equipment upgrade investment can be recovered through energy savings in short term

4.2 Social Value

The successful application of Jiangsu Lianheng’s new steam heating box practices the development philosophy of “green manufacturing and energy conservation.” In staple fiber production, steam consumption accounts for a significant proportion of total energy consumption. The daily saving of 5 tons of steam accumulates over time, bringing considerable economic benefits to enterprises while reducing energy consumption and carbon emissions, contributing solid strength to national energy conservation and emission reduction efforts.

5. Frequently Asked Questions (FAQ)

Q1: What is the role of steam heating boxes in staple fiber production?

Steam heating boxes are core temperature regulation equipment in staple fiber production lines, positioned between drawing machines and heat setting machines. They bear the important mission of heating the tow and stabilizing process conditions. The constant temperature they provide directly determines melt viscosity stability, which in turn affects fiber formation quality, breaking strength, uniformity, and subsequent processing performance.

Q2: What impact does temperature fluctuation have on staple fiber quality?

According to industry technical research, temperature fluctuations exceeding ±5°C can lead to abnormal melt viscosity, causing problems such as increased spinning breakage rates, uneven finished fiber quality, and frequent roller wrapping in heat setting machines. This not only affects production continuity but also significantly reduces the premium product rate, increasing production costs and resource waste.

Q3: How effective is Jiangsu Lianheng’s steam heating box in energy saving?

On a 100 tons/day production line at Zhejiang Lanxi Hengfang Synthetic Fiber Co., Ltd., the new steam heating box saves 5 tons of steam per day with significant energy-saving effects. At the same time, product quality improved synchronously, with a significant increase in the premium product rate.

Q4: How does the new steam heating box address traditional equipment pain points?

Jiangsu Lianheng addresses the three major industry pain points of “high energy consumption, temperature instability, and quality inconsistency” through the following technical optimizations:

Improved spray pipe layout to solve uneven steam injection problems
Optimized steam injection methods to maximize steam utilization efficiency
Precise temperature control system keeping fluctuations within process requirements

Q5: Will energy-saving modifications affect product quality?

No. Jiangsu Lianheng’s steam heating box, through technical optimization, has maximized energy utilization efficiency without reducing heating effects or affecting product quality, breaking the industry misconception that “energy conservation inevitably leads to quality degradation.” Actual data shows that product quality actually improves while saving energy.

6. Summary

Core Value:

Energy Saving: Daily savings of 5 tons of steam, significantly reducing energy costs
Quality Enhancement: Precise constant temperature control, significantly improved premium product rate
Efficiency Improvement: Reduced breakage and roller wrapping, enhanced production continuity
Green Manufacturing: Reduced carbon emissions, practicing energy conservation strategy

With dedication and perseverance, Jiangsu Lianheng Machinery Manufacturing Co., Ltd. remains customer-oriented with technological innovation at its core, focusing on energy-saving and precision upgrades of staple fiber production equipment. The company continuously optimizes the performance of core products such as steam heating boxes, helping more staple fiber production enterprises achieve cost reduction, quality improvement, and efficiency enhancement, driving the industry toward green, efficient, and high-quality development.

About Jiangsu Lianheng Machinery Manufacturing Co., Ltd.

Jiangsu Lianheng Machinery Manufacturing Co., Ltd. is deeply engaged in the research, development, and manufacturing of staple fiber production equipment, specializing in providing efficient, energy-saving, and precision production equipment solutions for polyester staple fiber and other chemical fiber enterprises. With technological innovation as its core competitiveness, the company continuously optimizes the performance of core products such as steam heating boxes, helping customers achieve the dual objectives of cost reduction with efficiency improvement and quality enhancement.

Contact Information

Company Name: Jiangsu Lianheng Machinery Manufacturing Co., Ltd.

Main Business: Research, development and manufacturing of staple fiber production equipment

Core Products: Steam heating boxes, drawing machines, heat setting machines, etc.

11/08/202511/08/2025

applications of nylon 6 staple fibers

What are the applications of nylon 6 staple fibers?

Nylon 6 staple fiber is a high-performance synthetic fiber with excellent properties such as high strength, good wear resistance, excellent elasticity, relatively strong moisture absorption (compared to polyester), alkali resistance, and resistance to organic solvents. It has a wide range of applications across multiple industries, as follows:

1. Textile and apparel field

Knitted fabrics: Used in making sportswear, underwear, T-shirts, etc. Its good elasticity and wear resistance enhance the durability and wearing comfort of the fabrics.
Woven fabrics: Blended with cotton, polyester and other fibers to make fabrics for shirts, coats, trousers, etc., improving the wrinkle resistance and strength of the fabrics.
Socks: It is an important application scenario for nylon 6 staple fiber. Its high wear resistance can extend the service life of socks, while maintaining good elasticity to fit the feet.

2. Home textile field

Bedding: Such as bed sheets, quilt covers, pillowcases, etc. By blending with other fibers, it increases the softness, durability and wrinkle resistance of the fabrics, improving the user experience.
Towels and bath towels: Adding nylon 6 staple fiber can enhance the wear resistance and water absorption of the products, and make them less likely to shed lint.

3. Industrial textiles field

Filter materials: With its chemical resistance and certain strength, it can be used to make non-woven fabrics for liquid or gas filtration, such as industrial wastewater filtration, air purification filtration, etc.
Geotextiles: Used in water conservancy, transportation, construction and other projects to play the roles of reinforcement, anti-seepage, drainage, etc. Its high strength and weather resistance can adapt to complex engineering environments.
Automotive interiors: Such as car carpets, seat fabrics, roof linings, etc., which need to have properties such as wear resistance, dirt resistance, and easy cleaning. Nylon 6 staple fiber can meet these requirements.
Medical and health products: Can be used to make inner layers of masks, surgical gowns, sanitary pads, etc. Its moisture absorption and softness make it suitable for scenarios in contact with the human body. Some specially treated nylon 6 staple fibers also have antibacterial functions.

4. Filling material field

Toy filling: As a filling material for plush toys, throw pillows, etc., it has the characteristics of good elasticity, high bulkiness, and not easy to harden, which can maintain the shape and soft hand feel of the toys.
Home filling: Such as sofa cushions, down quilts (mixed with down for filling), etc., improving the comfort and support of the filled items.

5. Other fields

Industrial rags: Utilizing its wear resistance and oil absorption, it is used for cleaning factory equipment.
Artificial fur: Processed through special techniques to simulate the appearance and feel of natural fur, used in making clothing, accessories, etc.

The wide application of nylon 6 staple fiber is due to its good comprehensive performance, and it can further expand its applicable scenarios through different process treatments (such as whitening, antibacterial, flame retardant, etc.).

05/08/202505/08/2025

Based on quality, driven by research and development, forging ahead into high-performance fiber equipment

Jiangsu Lianheng’s technical accumulation and market performance in the short fiber production line business fully demonstrate its development paradigm based on quality and driven by research and development, establishing significant technical barriers and market trust in the field of special fiber production equipment.

From the perspective of technological research and development, the enterprise has always adhered to the closed-loop logic of “quality benchmark – R&D iteration – market feedback”, and integrated the concept of precision manufacturing into the entire process of production line design. Its core competitiveness lies in the in-depth deconstruction of the spinning mechanism of polymer materials: by establishing a mapping model between rheological parameters and equipment process parameters during fiber formation, it achieves micron-level control over key indicators such as spinneret hole diameter accuracy, draft ratio regulation, and heat setting temperature field distribution. In response to the special spinning needs of high-performance fibers such as acrylic and carbon fiber, the R&D team has innovatively adopted a modular equipment architecture, enabling the same production line to adapt to the processing characteristics of raw materials with different degrees of polymerization through parameter reconstruction. This flexible production capacity significantly reduces the equipment transformation costs for special fiber enterprises and conforms to the current production trend of multiple varieties and small batches in the material industry.

In terms of the breadth of equipment application, Jiangsu Lianheng’s production lines have achieved full coverage of the high-performance fiber family. In the production of aromatic polyamide fiber (aramid), the low-temperature coagulation bath control system developed by it can control the fluctuation of coagulation rate within ±2%, effectively solving the industry problem of uneven axial strength of aramid fibers; aiming at the high-temperature spinning characteristics of polyphenylene sulfide (PPS) fibers, the screw extrusion system built with special alloy materials can withstand continuous operating temperatures of 280-320°C, with the equipment’s trouble-free operation cycle exceeding 8000 hours; in the field of bio-based fibers such as polylactic acid (PLA), the melt metering pump developed by it has an accuracy of 0.1%, ensuring the stability of molecular weight distribution of degradable polymer materials during spinning. This cross-material equipment adaptability stems from the enterprise’s systematic research on the molecular structure and processing performance of various fibers, forming an independently intellectual property equipment parameter database.

Market feedback data further verify the scientificity and reliability of its technical solutions. In the field of high-strength polyethylene fiber production, after a military supporting enterprise adopted its production line, the fiber breaking strength index increased from 30cN/dtex to 35cN/dtex, and the product qualification rate increased by 12 percentage points; after a biomaterial listed company introduced its PLA fiber production line, through the online quality monitoring system built into the equipment, it realized real-time correction of fiber linear density deviation, improving the stability of the air permeability index of downstream non-woven products by 20%. These empirical cases show that Jiangsu Lianheng’s equipment is not only a production tool but also a key variable for improving the performance of special fibers. This positive correlation of “equipment – material – performance” has built a technical trust bond between the enterprise and users.

From the perspective of industrial value, the development path of the enterprise conforms to the technical evolution law of the special fiber industry. Currently, high-performance fibers are developing towards the direction of “higher strength, more resistance to extreme environments, and more precise functionalization”. The requirements for production equipment have upgraded from simply “being able to produce” to “being controllable, repeatable, and optimizable”. By deeply integrating materials science and mechanical engineering, Jiangsu Lianheng’s production lines have become a key hub for transforming special fiber from laboratory achievements to industrial products. This “equipment empowering material innovation” model provides solid equipment support for China’s special fiber industry to break through foreign technical monopolies, and its technical logic and market performance have been widely recognized in the industry.

05/08/202505/08/2025

PP STAPLE FIBRE LINE CUSTOMER

The achievements of Jiangsu Lianheng in the field of polypropylene staple fiber equipment

Since its establishment on August 11, 2021, Jiangsu Lianheng Machinery Co., Ltd. has quickly emerged in the field of research, development and manufacturing of staple fiber equipment, with remarkable achievements especially in polypropylene staple fiber equipment. The company is located in Zhangjiagang City, Jiangsu Province, where convenient transportation and abundant industrial resources provide it with unique conditions for development.

Lianheng Machinery takes customers as the core and adheres to the concept of innovation, having formed unique technical advantages in the fields of polyester (PET), polyamide (PA), bicomponent fibers, polypropylene (PP) staple fibers and special fibers. In the field of polypropylene staple fiber equipment, one of the company’s most prominent achievements is providing strong equipment support for Hubei Botao Synthetic Fiber Co., Ltd. and its group branches, which is one of the world’s largest polypropylene staple fiber producers. By 2024, Botao Synthetic Fiber‘s annual production capacity of polypropylene staple fibers has reached more than 150,000 tons, and its sales revenue and market share have ranked among the top three for five consecutive years, which is inseparable from the support of Lianheng Machinery.

Jiangsu Lianheng Machinery has meticulously built a complete set of seven polypropylene staple fiber one-step spinning production lines for Botao Group. These production lines adopt advanced technologies and processes, significantly improving production efficiency and product quality. From the precise conveying of raw materials, the stable control of the spinning process to the efficient collection of finished products, the entire production line has achieved a high level of automation and intelligence, effectively reducing manual intervention, lowering production costs, and ensuring the stability and consistency of product quality. In addition, Lianheng Machinery has also upgraded and transformed some of Botao Group’s Italian equipment. By conducting in-depth research on the performance and characteristics of the original equipment, Lianheng Machinery’s technical team optimized and upgraded the equipment using its own advanced technologies and innovative concepts. This not only enhanced the operational stability of the equipment and extended its service life, but also further improved the production capacity and product quality of the equipment, enabling it to better meet Botao Composite Fiber’s growing production needs.

In addition to its in-depth cooperation with Botao Composite Fiber, Jiangsu Lianheng Machinery Manufacturing Co., Ltd. has seen its products and solutions widely applied in more than 20 countries and regions around the world, serving over 100 staple fiber production enterprises. Its technical strength and product quality in the field of polypropylene staple fiber equipment have been widely recognized by the market. The company is capable of customizing production equipment for differentiated polypropylene staple fibers to meet the diverse needs of customers. Meanwhile, it can provide customers with a full set of professional services ranging from feasibility studies, factory planning and design, to mechanical engineering design, process engineering design, electrical and instrumentation engineering design, pipeline and air-conditioning engineering design, as well as personnel training, making it a comprehensive partner for customers.

Jiangsu Lianheng Machinery Co., Ltd. has made important contributions to the development of the industry in the field of polypropylene staple fiber equipment by virtue of its advanced technology, high-quality products and comprehensive services. While promoting polypropylene staple fiber production enterprises to improve production capacity and product quality, it has also continuously consolidated its leading position in the industry. It is expected to achieve more brilliant achievements in this field in the future.

Hubei Botao Synthetic Fiber Co., Ltd.

BEST Customized PP One Step Staple Fiber Production Line- Cigarette Filter, PP color fiber, other special Fiber

04/08/202505/08/2025

BICO FIBER LINE LIANHENG MELAX

Jiangsu Lianheng Machinery Co., Ltd.: Jointly Building New Heights in the ET and ES Composite Fiber Industry with Chongqing Melax http://www.melaxgroup.cn

In the booming tide of the ET (PE/PET)/ES (PE/PP) core-sheath Bi-compnent fiber industry, Jiangsu Lianheng Machinery Manufacturing Co., Ltd., as the core supplier of the production line and the co – developer of technology for Chongqing Melax New Material Technology Co., Ltd., http://www.melaxgroup.cn has always adhered to the concept of “innovative collaboration, and intelligent manufacturing with high – precision”. It has deeply participated in and witnessed the leap – forward development of the global composite fiber industry from “following” to “leading”.

As an important supplier of Chongqing Melax’s production line, we are well aware of the decisive role of equipment performance in production capacity and quality. Relying on the technical accumulation in the field of mechanical manufacturing over the years, we have customized high – end equipment suitable for Melax’s production needs, helping it build the ET fiber production line with the largest single – line production capacity in the world. The daily production capacity of this production line exceeds 80 tons, refreshing the global single – line production efficiency record of ET fiber, and defining a new industry standard with the rare characteristics of “high – precision, high – stability, and high – automation”. From the original design of core equipment to the efficient adaptation of the production process, with our exquisite manufacturing technology and strict quality control, we have provided a solid equipment support for Melax’s large – scale production. As a result, the first production line put into operation in 2023 achieved an annual output of 7,000 tons, the production capacity increased to 14,000 tons in 2024, the second production line planned to be put into operation in 2026 is expected to have a production capacity of 40,000 tons, and in the next three years, it will move towards the goal of an annual production capacity of 100,000 tons.

In the field of technological R & D, we have joined hands with Melax to overcome many technical barriers in the production of ES and ET composite fibers. The two sides have deeply explored foreign cutting – edge process technologies, combined with local innovative needs, and achieved the intelligent upgrade of the whole link from quality inspection to process optimization. Our technical team covers many professional fields such as mechanical automation engineering and polymer material application. We have established a collaborative innovation mechanism of industry – university – research with Melax and many key domestic universities, and made breakthrough progress in key areas such as closed – loop blowing technology, significantly improving the product stability compared with the conventional industry technology. As of 2024, the cumulative investment in the R & D projects jointly promoted by the two sides is considerable, and a number of core patents have been formed, including many invention patents with important industry influence. These achievements have passed the international authoritative certifications such as SGS and ISO9001/14001, demonstrating our strength and responsibility in the field of technological innovation.

Upholding the same social responsibility concept as Melax, we have always adhered to the concept of green environmental protection and sustainable development in the process of equipment R & D and manufacturing. According to the characteristics of Melax’s bio – based ES fiber, which uses polylactic acid (PLA) biodegradable fiber, we have incorporated environmental protection considerations into the production line design, helping it achieve the ecological goal of completely degrading the product into carbon dioxide and water within 6 – 12 months. At the same time, in line with Melax’s green – manufacturing needs in the production process, we have optimized the equipment energy – consumption design, reducing the unit energy – consumption and carbon – emission intensity by 20% compared with the industry average level, and provided equipment – adaptation support for the promotion of its 3.2 – megawatt photovoltaic solar power generation project, jointly fulfilling the sustainable development commitment of energy conservation, emission reduction and environmental protection.

Taking the in – depth cooperation with Chongqing Melax as an opportunity, Jiangsu Lianheng Machinery Manufacturing Co., Ltd. has been constantly improving its core competitiveness in the manufacturing of ET and ES composite fiber production equipment and technological R & D. We will continue to adhere to the tenet of “collaborative innovation and common development”, join hands with global industrial chain partners, empower the upgrading of the hygiene products industry with advanced equipment and technology, contribute to the vision of “technology empowering a healthy life”, and jointly promote the sustainable development process of the composite fiber industry.

www.melaxgroup.cn
www.fiber-machine.com
www.lianhengmachine.com
www.lianhengmachinery.com

17/05/202517/05/2025

ET BI-CO FIBER

Introduction to ET Sheath-Core Composite Fiber (PE/PET Composite)

ET sheath-core composite fiber is a bicomponent fiber prepared by a special spinning process, with polyethylene (PE) as the sheath layer and polyethylene terephthalate (PET) as the core layer, forming a “sheath-core” structure. This fiber combines the flexibility and chemical resistance of PE with the high strength and heat resistance of PET. By precisely controlling the ratio of the sheath to core layers (typically 20%-30% sheath and 70%-80% core), an optimized combination of properties is achieved. The fiber diameter generally ranges from 10 to 30 microns, featuring a uniform sheath-core structure, excellent wear resistance, bending fatigue resistance, and a smooth surface or specially adjusted texture through process modification.

Core Application Areas

Textiles and Apparel
- Used in high-end sportswear fabrics, leveraging the hydrophobicity of the PE sheath layer and the moisture conductivity of the PET core layer to achieve a “waterproof outer layer, moisture-permeable inner layer” function, enhancing wearing comfort.
- Manufactures industrial textiles such as protective gloves and filtration materials (air dust filter cloth), utilizing PE’s acid-base corrosion resistance and PET’s high strength to extend service life.
Nonwovens Industry
- Medical field: Applied in surgical gowns and disinfectant wipes, where PE’s low toxicity and PET’s stability meet hygiene standards, while the fibers can be heat-bonded into high-strength nonwovens through hot rolling.
- Packaging materials: Produces eco-friendly shopping bags and agricultural mulch films, with PE’s flexibility enabling easy processing and PET’s rigidity enhancing material stiffness.
Composite Material Reinforcement
- Serves as a reinforcing fiber in resin-based composites (e.g., automotive interior parts, aerospace lightweight components). The sheath-core structure improves the interfacial adhesion between fibers and resin, enhancing the composite’s impact resistance and dimensional stability.
Special Industrial Fields
- Fabricates sealing materials for high-temperature environments (e.g., oven door seals). The PET core layer’s heat resistance (melting point ~250°C) withstands moderate high temperatures, while the PE sheath layer provides the elasticity required for sealing.

Advantages Over PE/PP Composite Fibers

Performance Dimension	ET Sheath-Core Composite Fiber (PE/PET)	PE/PP Composite Fiber
Heat Resistance	PET core layer has a high melting point (250°C), suitable for long-term use at 120-150°C, ideal for high-temperature processing or heat-resistant scenarios (e.g., hot rolling, drying).	PP core layer has a lower melting point (165-170°C), prone to deformation at high temperatures, limiting application scenarios.
Mechanical Strength	PET core layer offers tensile strength of 400-700 MPa, providing high overall fiber modulus and excellent tensile/tear resistance, suitable for high-strength applications (e.g., industrial lifting belts).	PP core layer has only 200-350 MPa tensile strength, with weaker fiber rigidity and prone to creep under long-term load.
Chemical Compatibility	PET core layer exhibits better resistance to organic solvents (e.g., alcohol, oils) and acid-base environments than PP, making it suitable for high-corrosion-resistance scenarios like medical and food contact applications.	PP core layer has poor resistance to polar solvents and is prone to swelling when exposed to oily substances.
Recyclability and Environmental Friendliness	PET is a recyclable material (recycling code 1), and both PET and PE are thermoplastics, enabling recycling through physical processes to meet environmental trends.	Although PP and PE are thermoplastics, PP/PE composite fibers are difficult to separate by flotation during recycling due to similar densities (both ≈0.9g/cm³), leading to higher recycling costs.
Functional Expansion	The PET core layer can be modified (e.g., by adding flame retardants or conductive carbon black) to endow fibers with antistatic, flame-retardant, and other special properties, suitable for electronic, fire-fighting, and other specialized fields.	PP core layer is more difficult to modify, limiting functional expansion.

Conclusion

ET sheath-core composite fiber significantly outperforms traditional PE/PP composite fibers in heat resistance, strength, and environmental friendliness through the performance complementarity of PE and PET, making it particularly suitable for high-end markets with demanding performance requirements. With stricter environmental regulations and industrial upgrading needs, its application potential in sustainable textiles, high-performance composites, and other fields will be further unleashed.

07/05/202507/05/2025

PP/PE Bi-Compenent Short Fibers

PP/PE Bi-Component Staple Fibers: Characteristics, Production, and Diverse Applications

PP/PE Bi-Co staple fibers are high – performance synthetic fiber materials formed by combining polypropylene (PP) and polyethylene (PE) through specific processes. This composite fiber integrates the excellent properties of PP and PE, demonstrating unique advantages in numerous fields. With the continuous progress of materials science and technology, its application scope is constantly expanding.

I. Basic Characteristics of PP/PE Composite Short Fibers

PP/PE Bi-conponent fibers combine the properties of the two polymers, PP and PE. PP has good mechanical properties, chemical corrosion resistance, a relatively high melting point (about 160 – 170°C), and excellent processing performance. PE is known for its outstanding flexibility, low – temperature resistance (it can maintain good performance in an environment of – 40°C to – 70°C), and electrical insulation. After compounding, the short fibers possess characteristics such as high strength, high toughness, wear resistance, chemical corrosion resistance, and good processing and molding properties. Their density usually ranges from 0.9 – 0.95g/cm³, which is lower than that of traditional natural fibers and some synthetic fibers. This gives it significant advantages in some application scenarios with strict weight requirements.

From a micro – structural perspective, the internal structure of PP/PE composite short fibers shows a state of phase separation and interweaving of PP and PE. This unique structure endows the fibers with multiple functions. For example, in terms of mechanical properties, PP provides high rigidity and strength, while PE enhances the flexibility and impact resistance of the fibers. In terms of chemical properties, the combination of the two expands the range of chemical corrosion resistance of the fibers. At the same time, due to the different crystallinities of PP and PE, the crystallization behavior of the composite fibers is more complex, which has an important impact on their physical properties and processing performance.

II. Production Process

(I) Raw Material Preparation

The first step in producing PP/PE composite short fibers is to select suitable PP and PE raw materials. For PP, homopolymer or copolymer polypropylene with a melt flow rate (MFR) between 2 – 10g/10min is generally chosen. The MFR value affects the fluidity of PP during the processing, thus influencing the forming quality of the fibers. For PE, linear low – density polyethylene (LLDPE) or high – density polyethylene (HDPE) is usually selected. LLDPE has good flexibility and tensile strength, while HDPE has higher rigidity and wear resistance. The appropriate PE variety is chosen according to different product requirements.

Before use, PP and PE raw materials need to be dried to remove moisture. The presence of moisture can cause hydrolysis of the polymer during processing, reducing the performance of the fibers. For example, it can decrease the strength of the fibers and cause surface defects. The drying process is usually carried out in a dehumidifying dryer at a temperature of 80 – 100°C. The drying time depends on the water content of the raw materials and the performance of the drying equipment, generally ranging from 2 – 4 hours.

(II) Blending and Modification

To further improve the performance of PP/PE composite short fibers, various additives such as antioxidants, UV stabilizers, and flame retardants are usually added to the raw materials. Antioxidants can prevent the fibers from degrading due to oxidation during processing and use, extending the service life of the fibers. UV stabilizers can enhance the fiber’s resistance to ultraviolet light, making it suitable for outdoor applications. Flame retardants endow the fibers with flame – retardant properties, meeting the requirements of some fields with strict fire – safety regulations.

The dried PP, PE raw materials, and additives are added to a high – speed mixer in a certain proportion for thorough mixing. During the mixing process, the high – speed rotating mixing blades enable the materials to be uniformly dispersed in a short time, ensuring that the additives are evenly distributed in the PP and PE matrix. The mixing time is generally 10 – 20 minutes, and the mixing temperature is controlled at room temperature.

(III) Melt Extrusion

The blended materials are conveyed to a twin – screw extruder for melt extrusion through a feeding device. The twin – screw extruder has good material conveying and mixing capabilities, allowing the materials to be fully melted and plasticized under the rotation of the screws. The temperature setting of the extruder is crucial. Generally, it is divided into multiple heating zones. The temperature gradually increases from the hopper end to the die head to ensure uniform melting of the materials. The initial temperature is usually set at 150 – 170°C, and the temperature near the die head can reach 220 – 250°C.

In the extruder, under the shear force and friction of the screws, the materials not only achieve melting and plasticization but also undergo molecular chain orientation and further mixing. The plasticized materials become a melt with good fluidity and are extruded from the die head of the extruder to form continuous filaments. The shape and size of the die head determine the cross – sectional shape and specifications of the fibers. Common cross – sectional shapes of fibers include circular and special – shaped (such as trilobal, cross – shaped, etc.). Different shapes endow the fibers with different performance characteristics. For example, special – shaped fibers have better covering properties, bulkiness, and moisture – guiding properties.

(IV) Cooling and Forming

The high – temperature melt filaments extruded from the die head need to be cooled and solidified rapidly to form a stable fiber shape. The cooling methods mainly include air cooling and water cooling. Air cooling usually involves directly blowing cold air onto the filaments. The cooling rate is relatively slow, but the equipment is simple and the cost is low, which is suitable for occasions where the cooling requirements for fibers are not high. Water cooling is to immerse the filaments directly in cooling water. The cooling rate is fast, which can make the fibers solidify rapidly, forming a uniform structure and improving the strength and surface quality of the fibers. The cooling water temperature is generally controlled at 15 – 30°C, and the cooling time depends on the specifications of the fibers and the cooling method, usually ranging from a few seconds to tens of seconds.

During the cooling process, the fibers will shrink and crystallize. The degree of crystallinity directly affects the physical properties of the fibers. To control the crystallinity of the fibers, a certain tensile force is sometimes applied to the filaments during the cooling process. Stretching can promote the orientation of molecular chains and improve the strength and modulus of the fibers. The draw ratio is generally between 3 – 6 times, and the specific value is adjusted according to the performance requirements of the products.

(V) Drawing and Orientation

Although the cooled and formed fibers have a certain shape and strength, the arrangement of molecular chains is not regular enough, and the performance of the fibers needs to be further improved. Drawing and orientation is to apply a tensile force to the fibers to align the molecular chains along the axial direction of the fibers, thereby improving the strength, modulus, wear resistance, and other properties of the fibers. The drawing process is usually carried out on a drawing machine, and a multi – stage drawing method is adopted to gradually increase the draw ratio.

The drawing temperature has an important impact on the drawing performance and structure of the fibers. Generally, the drawing temperature should be controlled between the glass transition temperature (Tg) and the melting point (Tm). For PP/PE composite short fibers, the drawing temperature is usually between 80 – 120°C. In this temperature range, the fibers have good plasticity and can undergo plastic deformation under the action of the tensile force, realizing the orientation of molecular chains. The drawing speed is also a key parameter. If the drawing speed is too fast, stress concentration will occur inside the fibers, and the fibers are prone to breakage. If the drawing speed is too slow, it will affect the production efficiency. The drawing speed is generally controlled between 50 – 500m/min.

(VI) Crimping Treatment

To increase the cohesion between fibers and improve the spinnability and processing performance of the fibers, the drawn fibers need to be crimped. Crimping is to apply mechanical force to the fibers through a crimping machine to form regular crimps. The crimping machine usually uses hot – roll crimping or mechanical crimping methods. Hot – roll crimping uses heated crimping rolls to crimp the fibers. During the crimping process, the fibers are softened by heat and are more likely to form stable crimps. Mechanical crimping is to extrude and bend the fibers through a mechanical device to achieve the crimping effect.

The crimp degree is an important indicator to measure the crimping degree of fibers, usually expressed by the number of crimps, that is, the number of crimps of the fibers per unit length (such as 1cm). The number of crimps of PP/PE composite short fibers is usually controlled between 3 – 8 per cm. The crimp degree is adjusted according to the application fields of the fibers. For example, fibers used in the textile field have a higher crimp degree to improve the spinnability of the fibers and the hand feel of the fabric. Fibers used in the non – woven fabric field have a relatively lower crimp degree to ensure the uniform distribution of the fibers in the non – woven fabric and the strength of the product.

(VII) Cutting

The crimped fibers need to be cut into short fibers of a certain length according to different application requirements. The cutting process is carried out on a cutting machine. The cutting machine usually uses rotating blades to cut the continuous fiber bundles. The cutting length can be adjusted according to customer requirements. Common cutting lengths include 32mm, 38mm, 51mm, etc., which are suitable for different textile processes and products.

During the cutting process, it is necessary to ensure the consistency of the cutting length to ensure the stability of product quality. After cutting, the fibers are screened and packaged to become the final PP/PE composite short – fiber products. The packaging method generally uses woven bags or plastic bags. The weight of each bag depends on market demand and transportation requirements, usually 25kg or 50kg.

III. Application Scope

(I) Textile Field

Garment Fabrics: PP/PE composite short fibers are increasingly widely used in garment fabrics. Due to their good moisture absorption, breathability, and quick – drying properties, they can provide a comfortable wearing experience for the wearer. Blending with natural fibers (such as cotton and wool) can improve the anti – wrinkle performance and dimensional stability of natural fibers. Blending with other synthetic fibers (such as polyester fibers and nylon) can enhance the softness and hand feel of the fabric. In the fields of sportswear and outdoor clothing, PP/PE composite short – fiber fabrics can quickly absorb the sweat excreted by the human body and evaporate it rapidly, keeping the skin dry and reducing the discomfort caused by sweat accumulation. At the same time, they also have good wear resistance and UV resistance, making them suitable for long – term outdoor activities.

Home Textiles: In the home textile field, PP/PE composite short fibers are widely used in bedding, curtains, sofa covers, and other products. Their soft hand feel, good stain resistance, and easy – to – clean properties make home textile products more durable and beautiful. For example, when making bedding, PP/PE composite short fibers can be blended with cotton, retaining the natural comfort of cotton while improving the anti – wrinkle and anti – shrinkage properties of the product. In the production of curtains and sofa covers, the UV resistance of these fibers can effectively prevent the fabric from fading and extend the service life of the product.

(II) Non – Woven Fabric Field

Hygiene Products: PP/PE composite short fibers are important raw materials for producing hygiene products (such as diapers, sanitary napkins, adult care pads, etc.). Their softness, water absorption, and hygienic properties meet the strict requirements of hygiene products. In diapers, the surface layer made of PP/PE composite short fibers can quickly absorb urine and spread it to the entire absorbent core, keeping the surface layer dry and reducing skin irritation. At the same time, the antistatic property of these fibers can prevent the surface layer from adsorbing dust and impurities, improving the cleanliness of the product. In sanitary napkins, the application of PP/PE composite short fibers can improve the softness and fit of the product, providing women with a more comfortable and safe using experience.

Filtration Materials: Due to their good filtration performance, chemical corrosion resistance, and mechanical strength, PP/PE composite short fibers are widely used in air filtration and liquid filtration fields. In air filtration, they can be used to make air – conditioner filters, industrial dust – removal filters, etc., which can effectively filter dust, pollen, bacteria, and other pollutants in the air and improve air quality. In liquid filtration, they can be used to make water filters, fuel filters, etc., filtering impurities, microorganisms, and organic pollutants in water, as well as impurities and moisture in fuel to protect the normal operation of equipment. For example, in the fuel – filtration system of automobile engines, the filters made of PP/PE composite short fibers can effectively filter impurities in the fuel, prevent the wear of engine parts, and improve the performance and reliability of the engine.

Geotextiles: Geotextiles are new building materials used in geotechnical engineering and environmental engineering. PP/PE composite short fibers play an important role in the production of geotextiles. Their high strength, corrosion resistance, and good water permeability enable geotextiles to be used for a long time in various harsh environments. In road construction, geotextiles can be laid between the roadbed and the road surface, playing the roles of isolation, reinforcement, drainage, and protection, improving the stability and service life of the road. In water conservancy projects, geotextiles can be used for the seepage prevention and reinforcement of dams and rivers, preventing soil erosion and water leakage. In landfills, geotextiles can be used as anti – seepage layers and drainage layers to prevent the pollution of soil and groundwater by landfill leachate.

(III) Filling Material Field

Thermal Insulation Filling: PP/PE composite short fibers have good thermal insulation performance. The air inside the fibers can effectively prevent the transfer of heat, playing a role in keeping warm. Compared with traditional thermal insulation filling materials (such as cotton and down), PP/PE composite short fibers have the advantages of low price, light weight, and resistance to moisture and mildew. In winter clothing, sleeping bags, warm bedding, and other products, PP/PE composite short fibers, as thermal insulation fillers, can provide good thermal insulation effects. At the same time, they also have good bulkiness and resilience, making the products more comfortable.

Furniture Filling: In furniture manufacturing, PP/PE composite short fibers are widely used in the filling of sofas, mattresses, pillows, and other products. Their softness, elasticity, and durability can provide good support and comfort for furniture. Compared with traditional filling materials such as natural rubber and sponge, PP/PE composite short fibers have the advantages of low cost and good environmental performance. In sofa filling, PP/PE composite short fibers can be mixed with other filling materials (such as sponge) to adjust the hardness and elasticity of the sofa to meet the needs of different consumers. In mattress filling, the breathability and resilience of these fibers can improve the comfort of the mattress and promote better sleep quality.

(IV) Other Fields

Agricultural Field: PP/PE composite short fibers also have certain applications in the agricultural field. For example, they can be used to make agricultural sun – shading nets and insect – proof nets. Sun – shading nets can adjust the light intensity and temperature, providing a suitable growth environment for crops and preventing crops from being damaged by high temperatures and strong light. Insect – proof nets can prevent the invasion of pests, reduce the use of pesticides, and achieve green and environmentally friendly agricultural production. In addition, PP/PE composite short fibers can also be used to make ropes, fishing nets, and other fishing products. Their high strength and corrosion resistance can meet the requirements of fishing production.

Industrial Field: In the industrial field, PP/PE composite short fibers can be used to make industrial accessories such as conveyor belts and transmission belts. Their high strength, wear resistance, and anti – aging properties enable these industrial accessories to have a long service life and good working performance. In mines, ports, factories, and other places, conveyor belts need to bear the transportation and friction of a large amount of materials. Conveyor belts made of PP/PE composite short fibers can effectively reduce the risk of wear and breakage and improve production efficiency. Transmission belts need to maintain stable transmission performance in a high – speed operation environment. The application of these fibers can meet this requirement and reduce equipment maintenance costs.

In conclusion, PP/PE composite short fibers, with their unique properties and diverse production processes, have shown great application potential in numerous fields. With the continuous progress of science and technology and the changing market demands, the performance of PP/PE composite short fibers will be continuously optimized, the production process will become more advanced, and the application scope will be further expanded, providing strong support for the development of various industries.

26/05/202326/05/2023

Polypropylene cigarette tow production line

Introduction

Polypropylene cigarette tow is a vital material used in the production of cigarette filters. The production line for polypropylene cigarette tow plays a crucial role in achieving efficient and high-quality manufacturing. This article will discuss the process flow, technological innovations, and considerations for sustainable development in the polypropylene cigarette tow production line.

Process Flow

The polypropylene cigarette tow production line involves several key steps. Firstly, polypropylene polymer, additives, and colorants are mixed and melted in an extruder. The molten polymer is then forced through spinnerets, forming continuous filaments. The filaments are stretched in a drawing process to enhance their strength and elasticity. After drawing, the filaments are crimped to improve the filtration efficiency of the cigarette filters. Finally, the crimped filaments are cut into predetermined lengths to form cigarette tows, which are then packaged for further processing.

Technological Innovations

Technological innovations have significantly influenced the polypropylene cigarette tow production line, enhancing efficiency and quality. Automation is a key area of innovation, with the introduction of advanced control systems that monitor and adjust process parameters in real-time. Automated systems improve production stability, consistency, and reduce the risk of human error. Additionally, advancements in extrusion and spinning technology have led to the development of high-speed spinning machines, capable of producing finer and more uniform filaments. These innovations result in improved filtration efficiency and enhanced smoking experience for consumers.

Sustainable Development Considerations

Sustainable development is an essential consideration in the polypropylene cigarette tow production line. Environmental impact reduction and resource conservation are primary objectives. Firstly, efforts should be made to reduce energy consumption through the adoption of energy-efficient equipment and processes. This can include the use of renewable energy sources and the implementation of energy management systems. Secondly, the production line should aim to minimize waste generation and optimize waste treatment processes. Recycling and reusing waste materials and wastewater can contribute to resource conservation and minimize environmental pollution. Additionally, the use of environmentally friendly additives and colorants should be encouraged to ensure the safety and sustainability of the cigarette tow production.

Quality Control and Market Demands

Quality control is of utmost importance in the polypropylene cigarette tow production line. Strict adherence to quality standards and regulations is necessary to ensure the consistency and safety of the produced cigarette tows. Additionally, market demands play a crucial role in driving innovation and development in the industry. Consumer preferences are shifting towards eco-friendly and sustainable products, which necessitates the development of environmentally friendly materials and processes.

Conclusion

The polypropylene cigarette tow production line has seen significant advancements in technological innovation and sustainable development. Automation, extrusion, and spinning technology have improved production efficiency and quality. Sustainable practices, such as energy reduction and waste management, have been implemented to minimize the environmental impact. Quality control measures ensure the consistency and safety of the cigarette tows. Furthermore, market demands for eco-friendly products drive innovation in the industry. The continuous integration of technological advancements and sustainable practices will ensure the long-term success and viability of the polypropylene cigarette tow production line.

26/05/202326/05/2023

Polyester staple fiber production line: innovation and sustainable development

Polyester staple fiber production line: innovation and sustainable development (generated by OpenAI ChatGPT)

Polyester staple fiber (PSF) is a significant synthetic fiber widely used in textile, apparel, home furnishings, and industrial materials. The production line for PSF is a crucial equipment in achieving its large-scale production. This article will discuss the process flow, technological innovations, and considerations for sustainable development in the polyester staple fiber production line.

The process flow of the PSF production line typically includes polymerization, spinning, drawing, and cutting. Firstly, in the polymerization stage, polyester raw materials and catalysts react at high temperatures to form polyester polymers. Next, the polymers undergo melting spinning in spinning machines to produce continuous filaments. Then, the filaments are subjected to drawing process, which increases their strength and elongation. Finally, the filaments are cut into staple fibers, which can undergo further processes such as dyeing, processing, and manufacturing of products as required.

Technological innovation plays a crucial role in driving the development of the PSF industry. Firstly, there has been a continuous improvement in the automation level of production line equipment, leading to enhanced production efficiency and product quality. Automated control systems monitor critical parameters, enabling real-time adjustments of process parameters to improve production stability and consistency. Secondly, innovations in spinning technology provide more options for short fiber production. For example, air-jet spinning technology can produce finer diameter fibers, enhancing the softness and hand-feel of the fibers. Additionally, energy-saving technologies for spinning equipment and improvements in wastewater treatment contribute to the sustainability of the production line.

Sustainable development considerations in the polyester staple fiber production line primarily focus on environmental protection and resource conservation. Firstly, the production line should prioritize reducing its environmental impact. This can be achieved through process and equipment improvements that minimize emissions of gases, wastewater, and solid waste. Additionally, introducing clean energy sources and technologies for efficient energy utilization can reduce the energy consumption and carbon emissions of the production line. Secondly, resource efficiency should be emphasized in the production line. For example, the recycling and reuse of waste fibers, wastewater, and waste heat can minimize resource wastage and environmental burden. Furthermore, research and promotion of biodegradable bio-based fiber materials can reduce reliance on fossil fuels, further enhancing the sustainability of the production line.

In addition to technological innovation and sustainable development, the polyester staple fiber production line also faces challenges in quality control and market demands. During the production process, strict control of the physical properties, chemical composition, and appearance quality of the fibers is necessary to meet the requirements of different applications. Moreover, as consumers increasingly focus on environmental and health concerns, there is growing market demand for sustainable fibers. Hence, the production line needs to stay in line with market demands, strengthen research and innovation, and provide high-quality products that meet sustainable development requirements.

In conclusion, the polyester staple fiber production line has made significant progress in technological innovation and sustainable development. Through process optimization, equipment automation, and environmental protection measures, the production line achieves efficient, environmentally friendly, and resource-conserving production. However, continuous efforts are required to drive technological innovation, address quality control challenges, and meet market demands, in order to achieve sustainable development in the polyester staple fiber industry.

11/05/202311/05/2023

FLAME RETARDANT (FR) STAPLE FIBER

The flame retardant (FR) staple fiber (1.4d to 15d solid fiber, 3d to 15d hollow conjugated fiber or Low melt fiber ) is made with adding non-halogen element of phosphorus system flame retardant and inorganic polymer flame retardant in the fiber polymerization process or Chips extrusion process.

Characteristics of flame retardant fiber:
1. Permanent flame retardant effect and contain no halogen element.
2. Non-toxic, low smoke volume.
3. Good flame retardant effect and thermal stability.

Application: it can be processed into non-woven fabrics, used in clothing and interior decoration materials.

24/04/202324/04/2023

Polylactic acid fiber PLA Fiber

Polylactic acid fiber PLA Fiber a biodegradable fiber

Polylactic acid fiber, referred to as PLA fiber, also known as corn starch fiber, is extracted from corn and other plants, fermented to produce lactic acid, and then refined and polymerized to form polylactic acid, and then processed into clothing products through spinning and weaving . After being discarded, it can be decomposed into carbon dioxide and water through the action of microorganisms, and can be absorbed and utilized by plants again through photosynthesis. Such a circular process truly embodies the concept of sustainable development of green environmental protection and circular economy.

PLA fiber is biodegradable, the fiber is soft and smooth, and the strength is moderate. The products made have silky luster and comfortable skin touch and feel, good hygroscopicity and quick-drying effect, good drapability, and good heat resistance. Non-toxic, natural antibacterial and anti-ultraviolet functions, it combines the effects of scratching and gloss, and has excellent wearing

1. Pure natural material, completely biodegradable

The raw materials for producing PLA are abundant. All natural biomass raw materials containing starch, cellulose and hemicellulose can be used to produce lactic acid, and then polymerized to produce polylactic acid. In order to avoid ” competing with people for food and land with food ” , non-food crops ( such as cassava ) can also be used as raw materials, or even organic waste (corn cobs or roots, stems, leaves, skins, straw, straw, Urban organic waste, industrial waste, etc.) can be used as raw materials to produce lactic acid, and then produce polylactic acid. These raw materials can be obtained through continuous planting. As no oil or wood is used, this will protect limited oil and wood resources.

Compared with natural fiber cotton, the yield per mu of PLA fiber is large. For example, the yield per mu of cotton is only 63Kg, while that of corn can reach 325Kg. Therefore, the same acre of land can produce more PLA fiber than cotton fiber. In addition to this, 29,000 tons of water are required to produce one ton of cotton fiber, while less than 100 tons of water are required to produce one ton of PLA fiber.

The melting point of PLA fiber is lower than that of polypropylene fiber, and the energy consumed to produce PLA fiber is less than that of the three major synthetic fibers, and also lower than that of PTT and Lyocell fibers. The comprehensive energy consumption of the product is currently the lowest in the production of major chemical fibers.

PLA fiber can be degraded naturally in nature, and can be quickly decomposed into carbon dioxide and water under the action of microorganisms in soil or seawater. According to the test of relevant departments, more than 40.5% of PLA fiber can be degraded after 45 days of landfill, and 94.2% after 180 days . It can be degraded and is an environmentally friendly fiber. When PLA fiber burns, it will not emit poisonous gas, will not cause pollution, and realizes carbon cycle. It is a sustainable ecological fiber.

2. Lightweight, warm, skin-friendly and breathable

The density of PLA fiber is 1.27g/cm3, which is a lightweight fiber and tries quickly after being wetted with water without feeling sticky or heavy, The young’s modulus of PLA fiber is between polyester and nylon, so it feels slightly harder than nylon, but much softer than polyester. PLA fiber has a low refractive index and has elegant luster like silk. When worn in winter, the thermal insulation of PLA fibers is more than 20% higher than that of cotton and polyester fibers. In summer, PLA fiber fabrics have excellent moisture permeability and water diffusivity, absorb sweat and dry quickly, and can quickly take away body heat through evaporation. There is a refreshing feeling all year round.

The surface of PLA fiber is weekly acidic, and its PH value is 6.0-6.5, which is weekly acidic, and the skin of a healthy human body is also weekly acidic, so PLA fiber has good compatibility with weakly acidic skin. at the same time, when a person is exercising, the sugar in the body turns into energy, and lactic acid is formed in the body (muscle). The fact that the body itself accepts lactic acid is a safe material. It has natural anti-allergic and skin-friendly functions on human skin, and is especially suitable for making various skin-friendly products.

3. Good resilience, wrinkle resistance and shape retention

The initial modulus of PLA fiber is low, the drapability is small, and the fabric has good drapability. When the tensile deformation of PLA fiber is 5%, the elastic recovery rate is as high as 93%, which shows that PLA fiber has good bulkiness and elastic recovery rate, which is better than nylon. The fabric made has good elasticity and good wrinkle resistance, which is very suitable for making sportswear.

　　In addition, PLA fibers and their fabrics do not absorb ultraviolet rays, and their strength and elongation are not greatly affected by long-term ultraviolet radiation. After 500 hours of outdoor exposure, PLA fiber can still retain about 55% of its strength.

4. Natural antibacterial, antibacterial, anti-mildew

PLA fiber has natural antibacterial and antibacterial ability, without adding any other ingredients, it can form a natural and stable antibacterial environment on the surface of the fiber, making it difficult for Staphylococcus aureus, Escherichia coli and Candida albicans to reproduce.

5. Good flame retardancy

The limiting oxygen index of PLA fiber reaches 24-29, which is the highest among commonly used fibers, and is already close to the national standard’s requirement for the limiting oxygen index of flame-retardant fibers to be 28-30.

PLA fibers are not easy to burn, and have good self-extinguishing properties after burning. During the burning process, only slight smoke is released, and the amount of smoke is very small.

6. Easy to dye, good coloring, bright color

PLA fiber is dyed with disperse dyes like polyester fiber, but it is easier to dye than polyester fiber. The pre-dyeing treatment, dyeing, post-dyeing and finishing of knitted/woven and interwoven/blended fabrics must follow the principles of low temperature, low alkali and short process. Generally, it can be dyed at 95°C to 100°C. For a small number of cases that need to be dyed dark, it can be dyed at 110°C. Even so, the dyeing temperature is lower than that of polyester. The dyeing temperature of PLA fiber is low, the setting temperature is low, and strong alkali is not used, which is in line with the trend of energy saving and emission reduction.

Due to its lower refractive index, the color of PLA fiber dyed is also brighter.

Classic App

PLA fiber uses natural and renewable plant resources as raw materials, which reduces the dependence on traditional petroleum resources and meets the requirements of sustainable development in the international community. It has the advantages of both synthetic fibers and natural fibers, and at the same time has complete natural circulation and biodegradation Compared with conventional fiber materials, PLA fiber has many excellent properties, such as good drapability, comfort and hand feeling, good resilience, good crimp and crimp durability, etc., which makes PLA fiber in There are broad application prospects in the clothing market, household and decoration market, non-woven fabric market, medical and health protection and other fields.

1. Clothing fabrics

PLA fiber has good shape retention. When blended with cotton, it has properties similar to polyester-cotton blended fabrics. It has good gloss, but does not produce metallic glare. Good hand feeling; when it is blended with wool, it has good shape stability, crease resistance and brightness; so it is suitable for dynamic clothing, children’s clothing, underwear and sweatshirts, etc.

underwear

sportswear

Ladies & Casual

children’s clothing

2. Home textiles

PLA fiber has the characteristics of cashmere-like feel, silk-like soft luster, warmth retention of wool, and moisture absorption and moisture conductivity of cotton fiber. Its application in bedding (interweaving/blending) can give full play to its advantages of good skin affinity, non-irritating skin, and non-allergic effects, and overcomes the shortcomings of polyester-cotton/wool-polyester fabrics, and is better than cotton/wool fabrics. Excellent dimensional stability and skin-friendliness, easy to wash, dry and care.

3. Industrial textiles

Automotive interior

medical supplies

Another characteristic of PLA fiber is its good biocompatibility. In this respect, it has some incomparable advantages of traditional medical devices. For example, in the past, stainless steel bone nails were used in the treatment of fractures and other orthopedic diseases, and the patient had to undergo a second operation to be cured; however, the use of polylactic acid bone nails only requires one surgical implantation. To a great extent alleviate the suffering of patients. In addition, PLA fibers have been successfully applied in some specific fields, such as the production of disposable infusion sets, non-removable surgical sutures, orthopedic fixtures and surgical devices, medical stents, biological catheters, etc. The pressure of medical waste on the environment.

Protective Equipment

PLA is a thermoplastic polymer with good toughness, good biocompatibility, skin-friendly and breathable advantages. It can be used to make products such as sanitary napkins, panty liners, diapers, medical gauze, bandages, bed sheets, high-grade antibacterial wipes, etc.

Daily necessities

At present, there are mainly two kinds of cigarette filter materials used in the market, one is cellulose diacetate fiber and the other is polypropylene fiber. Compared with these two traditional materials, the cigarette filter made of PLA fiber not only has a wide range of sources, but also is biodegradable, and its polar molecular structure determines its ability to absorb and remove harmful components in smoke. Therefore, the use of PLA fiber filters will bring about major changes to the cigarette filter industry. In addition, masks are another key application field of PLA fiber.

Product Specifications

20/06/202220/06/2022

Which fields are High Tenacity polypropylene high-strength Fiber/yarns suitable for?

Ropes made of high-strength polypropylene fibers and nets for construction, transportation, agriculture, fishery, and sports activities have high breaking strength, wear resistance, corrosion resistance, light weight and safety.

Polypropylene yarn made of high-strength polypropylene yarn is mainly used in woven bag sewing, football, volleyball, baseball, yo-yo because of its low price, high strength, anti-aging, wear resistance, seawater corrosion resistance, and good elasticity. Thread, cable thread, netting thread, shoe material thread, luggage thread, kite thread, twisted edge thread, waste edge thread, special thread for container bags, sewing thread, banknote binding thread, curtain thread, construction thread, engineering thread, webbing Line, toy line, umbrella rope line, optical cable winding line, fishing net line and other industries.

What are the factors that affect the strength of polypropylene high-strength yarn?

1. The influence of melt index

The melt index of the raw material represents the molecular weight of the raw material to a certain extent. Under the same process conditions, the amount of fiber increases. When the molecular entanglement degree is large, the strength of the drawn fiber increases with the increase of the molecular weight. When the molecular weight is low, the slippage between the molecular chains is easy to occur, which is manifested in the decrease of the fiber strength. In the spinning process of polypropylene high-strength yarn, several different melt index raw materials are used.

During the trial spinning process, it was found that under the same process conditions, the melt index of the raw material was different, and the strength of the finished yarn was different and showed a certain regularity.

Under the same spinning temperature, the same stretching ratio and the same process parameters, the lower the melt index of polypropylene chips, the higher the strength of polypropylene high-strength yarn.

2. The influence of stretch ratio

The stretching process of the primary fiber is to destroy the original structure of the primary fiber and generate a new ordered structure. Under the action of tensile stress and thermal effect, the mobility of the macromolecular segment increases, and various structural units slide on the fiber. Axial orientation aggregates, rearranges and adds new bonding points, so that more molecular chains of the fiber are in a particularly good stress-bearing state, and the regularity of the three-dimensional structure (that is, crystallization) is generated, and the fiber density increases with the increase of the stretching ratio. .

With the increase of the stretching ratio, the strength of the fiber increases, and the stretching ratio contributes more to the strength of the fiber.

08/08/202108/08/2021

MARKET TREND WEEK 32- OIL PTA MEG PET PSF VSF

Market this week – W32

Summary: Oil closed down, PTA fell, MEG fluctuated, Polyester chip rose and fell, Polyester filament yarn promoted, PSF weakened, VSF stabilized.

1,Oil prices fluctuated and closed down this week. The rebound of the epidemic has offset the positive impact of the recovery in global demand. At the same time, Saudi Arabia, Kuwait and the United Arab Emirates increased their crude oil exports to a few-month high last month. The two major crude oil futures both plummeted on Monday, the biggest decline in a week. Due to the increase in Delta variant virus infection cases in many countries in the Asian region, causing market concerns, the two major crude oil futures prices continued to fluctuate on Tuesday. The two major crude oils continued to fall on Wednesday, as the recovery momentum of global air transportation fell for the second consecutive week, which to a certain extent confirmed the anxiety of the market. Oil prices both rebounded on Thursday.

2,PTA fell. As crude oil plummeted, PTA followed the downward trend. The enthusiasm for low-price purchases is better. From the perspective of supply and demand, equipment maintenance was concentrated in early August, and supply and demand remained de-stocked. However, due to the impact of the recent epidemic, some polyester factories fell slightly, the market mentality was suppressed, and crude oil prices weakened, and short-term fluctuations are expected to be weak.

3,MEG rushed higher and fell back. At the beginning of the week, MEG prices followed the downward trend of raw material prices. In the middle of the week, due to the ban on berthing in Zhangjiagang and the shutdown of Zhejiang Petrochemical’s atmospheric and vacuum equipment, traders are actively replenishing goods. In August, the MEG supply and demand pattern shifted to a small accumulation of warehouses, which was significantly affected by the delayed cargo warehousing at the end of July. Domestic coal-based MEG plants are gradually recovering, and the start of China’s coal-based production in August can rise to more than 50%. Starting from mid-August, spot replenishment from domestic sources and imports will be realized one after another. However, the recent temporary shutdown of overseas installations has significantly boosted market confidence. Some traders on the market are actively replenishing goods. It is expected that the MEG market will be strong.

4,Polyester chips rose and fell. At the beginning of the week, the chip price hit a new high, but the demand side was obviously weak, and high-level buying in the market was scarce. In the second half of the week, as crude oil continued to plummet and polyester raw materials fluctuated widely, the chip market was selling at low prices by some traders, and transaction prices gradually fell. Polyester raw materials tend to fluctuate at a high level, but the demand side follow-up momentum is obviously insufficient, and the chip processing fee continues to be low. It is expected that the short-term polyester chip price will maintain a fluctuating trend.

5,Polyester filament yarn in Jiangsu and Zhejiang promoted. At the beginning of the week, as raw materials fell, terminal operations weakened. On Wednesday afternoon, the polyester filament factory started to promote sales under the expectation of the accumulated inventory, trying to exchange price for quantity, and the production and sales increased significantly; on Thursday, the polyester filament factory’s quotation was revised back. The South China polyester filament factory remains stable as a whole. In the export market, the export quotations were basically the same as the previous period, with minor adjustments sporadically. The overall export orders remained weak. On the one hand, the epidemic in Southeast Asia was severe, and Europe was in the summer holiday, and market demand was significantly declining; on the other hand, ocean freight was high, and the ocean freight rate even accounted for 50% of the value of the goods, and most of them were in a state of loss. Foreign customers have very low purchasing intentions, and it is difficult to improve the short-term export market.

6,Polyester staple fiber fluctuated and weakened, cash flow losses improved, and loading rate dropped slightly. Affected by the decline in crude oil and polyester raw materials, PSF futures fell, and the spot market gradually followed the decline. As raw materials fell more than staple fiber, PSF cash flow losses decreased. Affected by the epidemic, logistics in the Yizheng area was affected, causing factories in the area to reduce production. This week, PSF low-priced transactions were more active, showing that the low market demand is acceptable. The physical inventory of staple fiber factories is tight, especially the Jiangsu factory, and cash flow has improved recently.

7,Viscose staple fiber price was generally stable and the rate of increase slowed down. Some of the high quotations in the early period were slightly loosed. Traders’ willingness to sell has also increased, with prices slightly lower than market prices. However, the downstream spinning mills are not enthusiastic about purchasing, and often perform the previous contracts normally. The local epidemic has a certain impact on logistics, but it has not yet affected the load of the VSF factory. The export market was good this week, and orders from some overseas regions increased. Due to the rebound of the epidemic, it is difficult for mid-range fibers to perform well in the short term, and mid-range fibers may be discounted next week. On the high-end side, low prices are expected to remain stable.

01/08/202101/08/2021

MARKET TREND WEEK 31- OIL PTA MEG PET PSF VSF

Market this week – W31

Summary: Oil closed up, PTA rose, MEG fluctuated, Polyester chip rose significantly, Polyester filament yarn promoted and rose, PSF fluctuated, VSF increased slightly.

1,Oil prices fluctuated and closed up this week. Recently, the Delta virus mutant has spread rapidly in various countries around the world. Investors are worried that the epidemic will impact the global economic recovery. At the beginning of the week, crude oil prices fell slightly. In the middle of the week, the market expects that the supply of crude oil for the rest of this year will continue to be tight. At the same time, after the US crude oil supply hit the lowest level since January 2020, the supply will be further tightened and crude oil prices will rise slightly. This week’s U.S. crude oil inventories fell more than expected, but fears about the epidemic have increased, limiting the increase, and WTI crude oil prices closed up slightly.

2,PTA fluctuated and rose. Oil prices rose this week, and PX rose slightly. Supplier inventories have dropped significantly, and PTA futures have performed strongly. In terms of spot market, at the beginning of the week, due to the influence of typhoon weather, the port was closed, the operating load of the new Yisheng facility was unstable, and the transportation volume of tank trucks decreased. As a result, the supply of PTA in polyester plants is tight, and some polyester plants are running at a reduced load. However, under the situation of tight spot liquidity, the basis performance is strong. In the middle of the week, as the impact of the typhoon weakened, the Yisheng device was restored, the port began to unload, and the supply of tankers was restored, and the basis was loosened. In the short term, crude oil will remain volatile and consolidate, but fears about the epidemic still exist and the upside is limited. The overall performance of PTA is relatively strong.

3,MEG prices rebounded from low levels, and the market trading volume was general. In the first half of the week, the price of MEG fluctuated weakly, and some polyester factories fell under the influence of the typhoon. In the middle of the week, port inventories were running at a low level. Boosted by the temporary shutdown of the South Asian installations in the United States, MEG futures increased, and the spot buying orders on the market followed actively, and the night trading surged sharply on Thursday. As of Friday, the price of MEG has fallen from a high level. In the short term, MEG is operating with low inventory, and MEG prices are mainly adjusted in a wide range.

4,Polyester chips price has risen significantly, mainly driven by rising costs. During the week, crude oil remained strong, and polyester raw materials continued to rise. Especially in the second half of the week, PTA set a new high. Although the demand side performance was weak, but driven by the cost, the polyester chip factory’s quotations were raised one after another, and signed prices were negotiated and moved up gradually. Recently, after the polyester cost has risen sharply, the terminal’s follow-up efforts have been limited. In addition, the efficiency of polyester chips is at a significant loss, and subsequent reductions and suspensions may be continued. It is expected that the short-term polyester chip prices will mainly fluctuate at a high and wide range.

5,Polyester filament yarns in Jiangsu and Zhejiang was promoted at the end of the month. Due to the impact of typhoon weather on downstream operations and the recent weakening of terminal orders, polyester filament factories have low equity inventory, but due to slow delivery in warehouse, the actual inventory is high, polyester filament factories promote some high-stock specifications at the end of the month. But due to the sharp increase in the cost of polyester raw materials this week, the quotations of polyester filament factories began to rise on Friday. The quotation of the South China polyester yarn factory rose, and the transaction was negotiated. In the export market, export quotations rose slightly, and actual transactions were negotiated. Recently, the overall export orders are still weak. Under the background of high freight rates, foreign customers are less enthusiasm for inquiries and basically maintain rigid demand purchases.

6,Polyester staple fiber remained fluctuated. PSF’s losses have gradually increased, and the production cut down has increased. On Monday, PSF futures rose slightly and then fell back, and the spot market also gradually followed the decline. At the same time, polyester raw materials rose, and PSF cash flow losses gradually expanded. On Thursday night, PSF main manufacturers collectively raised prices. In Friday morning, other PSF factories followed up and raised their quotations. Due to the rising inventory of PSF and the recent serious losses, PSF factories have become more willing to reduce production.

7,VSF continued to rise, small and medium-sized factories rose rapidly, but the quotations of large factories were relatively stable. The quotations of mid-to-high-end brands are upside down. As it has a more obvious cost-effective advantage compared to mid-range fibers, the low-priced parts of high-end brands sold well this week. Non-woven fibers rose slightly this week. The black fiber remained stable for the time being, and the sales was relatively good. The export market is performing normally. The overseas market experienced the Islamic Eid al Adha in the early period, and some procurement operations have been postponed. At the same time, due to the rebound of the epidemic in some countries, the market has been worried, and export prices have temporarily stabilized.The VSF market is relatively good recently, and the downstream has a certain price transmission capacity, and the risk of price decline in the short term is not high.