Continuous Polymerization Reactive Extrusion Line (TPU)
Features
Twin Screw Solution for In-Situ Polymerization & Advanced Material Processing
The Continuous Polymerization Reactive Extrusion Line developed by CBextrusion is a state-of-the-art system designed for continuous polymerization, polycondensation, grafting, and compounding within a high-performance co-rotating twin-screw extruder.
Unlike traditional batch reactors, this system integrates feeding, chemical reaction, mixing, devolatilization, and pelletizing into a fully continuous, automated process, ensuring stable product quality, higher efficiency, and reduced production costs.
Typical application incudes: TPU reactive extrusion (polyurethane fiber, elastomer and adhesive), PC melt phase polycondensation, PMMA bulk polymerization, acrylic resin polymerization. nylon polycondensation and different kinds of grafting reaction.
TPU Reactive Extrusion Line
The TPU Reactive Extrusion Line is a continuous production system designed to manufacture thermoplastic polyurethane (TPU) through in-situ chemical reaction inside a twin-screw extruder. It integrates polymerization, mixing, devolatilization, and pelletizing into a single process, replacing traditional batch reactors.
By precisely controlling temperature, residence time, and material feeding (polyols, isocyanates, and additives), the system ensures stable reaction conditions and consistent product quality. The high-torque twin-screw design provides excellent mixing performance, making it ideal for high-viscosity TPU materials.
This technology offers significant advantages such as continuous operation, higher efficiency, lower energy consumption, and better product uniformity. The products manufactured are widely used in cables, films, automotive parts, and footwear materials.
Flow Chart for TPU Reactive Extrusion Line
1. metering feeder system 2.material hopper 3.mixing head 4. main extruder 5.diverter valve 6.screen changer 7.underwater pelletizer 8. centrifugal dewatering 9.vibrating sieve 10.product silo
Why Replace Traditional Polymerization?
|
Factor |
Reactive Extrusion |
Batch Reactor |
|
Process |
Continuous |
Batch |
|
Reaction Efficiency |
Very High |
Medium |
|
Energy Use |
Low |
High |
|
Labor Requirement |
Low |
High |
|
Product Stability |
Excellent |
Variable |
|
Scalability |
Easy |
Limited |
Features of Grafting Material (Compatibilizers) Pelletizing Line:
1.High torque twin screw extruder. It is suitable for high melt viscosity of graft material.
2.Adopt Loss- in-weight feeding system, feed the resin granules, processing additives and diluted initiator liquid steply to meet the high accurate requirement to proportion of the initiator and polymer.
3.The barrel and screw with large L/D: L/D=48:1-52:1, provide longer residence time, which is conducive to the completion of melting homogenzation and 8rafting reaction, and 1-2 sections of vacuum degassing barrelis equipped to eliminate by-products in reaction to reduce product odor.
4.The pelletizing method is selected according to the melt characteristics. Diferent raw materials and ratios in the formulation have large differences in melt characteristics. The higher hardness products can select water cooling strand pelletizer, and the low-viscosity and easy-adhesive products can adopt under water pelletizer.
Equipment Advantages
1.Continuous in-situ polymerization (bulk, melt, or reactive processing)
2.High-efficiency co-rotating twin-screw extruder for superior mixing and reaction control
3.Precise temperature and residence time management for stable molecular structure
4.Multi-stage vacuum degassing system for removal of monomers and volatiles
5.Flexible feeding system for solid, liquid, and additive dosing
6.Fully automated PLC control system for intelligent operation
CBextrusion Core Strength
1.Proven high-torque twin screw technology
2.Deep expertise in reaction extrusion processes
3.Custom engineering for complex reactions
4.Turnkey solutions: Process + Equipment + Support
5.Global project experience








