Liquid State Polymerization LSP System

PET IV-increase Solution (Polymer Finisher)

LSP improve the quality of PET recycling material (fibre, bottle flake, film, Low IV polymer) , To produce high grade PET fibre, PET packaging strip, PET pellet, PET film, Recycle bottle to bottle, fibre to fibre, improve the recycling utilization and quality of resources.

  • Innovation structure

The innovative structural design of the reactor, increases the reaction area of  polymerization, improves the fluidity of PET melt, makes the reaction time shorter.

  • Smart Control

With our new smart control system, operations and real-time monitoring is more convenient than ever before, to predict maintenance and improve production efficiency.

  • High Energy Efficiency

Frequency conversion equipment is used to automatically adjust operation frequency. The multiple level temperature control system minimizes the required heating energy consumption and reduces the operation cost of the whole system.

LSP Excellent IV improvement effect

With our good homogenization feature, the reactor could mix different raw materials into homogeneous melt.

Achieve Higher Throughput

Through the buffer of our reactor, the whole production system is more controllable, increase output and avoid time lost during the process of replacing filters.

Working Principle

LSP is an extremely efficient alternative to a Solid State Polymerization (SSP) as there is no energy needed to cool the polymer down and then reheat it. Further, the reaction time in the melt phase is considerably faster than in the solid phase, which also contributes to the better ;;economics of the LSP system.

  • Homogenization

Because the source of recycled material is complex, the components are difficult to guarantee, which shows that the fluctuations of melt in production process. In order to stabilize the IV, the reactor runs at a certain speed, so that the internal melt is fully mixed.

  • Remove Impurity

Because PET re-polymerization is carried out in a high vacuum state, the low molecular material contained in the raw material and the auxiliaries will be vaporized in high temperature.

  • Molecular Chain Growth

There are still a large number of hydroxyl and carboxyl molecules in the raw materials, and the catalytic system is still effective. the polymerization still occur under certain temperature and vacuum state, The molecular chain and IV will increase.

  1. After Extrusion

The first melt filter after the extrusion can filter the inorganic impurities, and facilitate the further reaction.

  1. During Reaction

Under high vacuum conditions, the oligomers and decomposed gases are separated from the melt and removed into the vacuum system.

  1. After Reaction

High-viscosity melt passes through the last melt filter and the inorganic impurities

that still remain in the melt will be filtered.

High Quality Products

  • High Purity

After multiple filtration and homogenization, the recycled polyester melt has higher purity and IV, and color of the end product are more uniform.

  • High Strength

Under the high temperature and vacuum polymerization reaction, the molecular chains and IV are continuously increased, and the strength of the produced polyester product is also better.


Key words:

Polymer finisher; polyester staple fiber finisher, POY finisher, PSF finisher; recycle fiber finisher; recycle fiber homogenizer; polyester impurity remover; increase IV; SSP (Solid state polymerization); LSP (Liquid state polymerization), rPET recycling, Bottle flakes to Fiber