In the working conditions of high-viscosity reaction system, the twin-screw extruder has strong heat and mass transfer and interface renewal capabilities, narrow residence time distribution, excellent heat exchange and devolatilization surface, and easy continuous operation. A series of advantages, with many advantages that are difficult to achieve with traditional equipment; twin-screw polymerization reaction extruder (or called twin-screw reactor), not only has the heat transfer, mixing, shearing, and conveying of ordinary extruders Physical processes such as venting, venting, extrusion, etc., at the same time run through the chemical changes of the polymerization reaction, so the process is more complicated and the technology intensive is higher. It is not many, but it is very important. Different reaction types, the structural form and characteristic parameters of the unit are also quite different, and generally need to be tailored for specific material systems and polymerization processes.

Typical applications: TPU reactive extrusion (spandex, elastomer, adhesive); PC melt polycondensation; PMMA bulk polymerization; acrylic resin polymerization; nylon polycondensation and various grafting reactions;

Flow chart of TPU twin screw polymerization granulation unit

1. Raw material warehouse 2. Metering feeding system 3. Mixing head 4. Twin screw extruder 5. Start-up valve 6. Screen changer 7. Underwater hot pelletizer 8. Centrifugal dewatering machine 9. Vibrating screen 10. Finished product silo

2. The twin screw reaction host of the TPU reaction polymerization line

3. Raw material storage system for TPU reaction polymerization line

Raw material metering and pouring machine for TPU reaction polymerization line

Underwater pelletizing system of TPU reaction polymerization line

The typical host configuration is as follows