Devolatilization method and equipment of thermoplastic elastomers

Abstract

The invention relates to a devolatilization method and equipment of thermoplastic elastomers. Water colloidal particles after the vibration dehydration are directly fed in a conical centrifugal dryer of a primary drying station for devolatilizing; dry colloidal particles after the devolatilization are fed in a pelletizing station, are pelletized by a screw extruder, and are fed in a conical centrifugal dryer of a secondary drying station for further drying; the drying hot wind temperature is 40-120 DEG C, and the wind volume is 10-600 L / s; the extruding temperature of the screw extruder is 100-200 DEG C, and the extruding pressure is 1-10 MPa; screen holes are formed in the screen surface of the conical centrifugal dryer for drying; small screen ports are connected with a driving bearing, and large screen ports are connected with a driven bearing; the driving bearing is driven through power equipment to rotate; and the conical centrifugal dryers are additionally provided with hot wind pipes, exhaust ports, cleaning ports and liquid level tanks. The method has such advantages as short technological process, less equipment floor, thorough devolatilization, stable index control, low content of product gels and large bulk density.

Description

technical field [0001] The invention relates to a post-treatment devolatilization method and equipment for thermoplastic elastomers, mainly including vibration dehydration, primary drying, granulation, secondary drying and other processes. Background technique [0002] Thermoplastic elastomer (TPE) is a polymer material between rubber and resin. It can not only replace part of rubber, but also modify plastic. The dual properties and broad characteristics of rubber and plastics possessed by thermoplastic elastomers make them widely used in the rubber industry to manufacture daily-use products such as rubber shoes, rubber cloths, rubber hoses, tapes, rubber strips, rubber plates, rubber parts and adhesives, etc. Various industrial supplies. At the same time, thermoplastic elastomers can also be used in large quantities instead of rubber in the modification of general thermoplastic resins such as PVC, PE, PP, PS, and even engineering plastics such as PU, PA, and CA. [0003] ...

AI Technical Summary

Problems solved by technology

In practical application, it is found that the traditional wet devolatilization method has problems such as long process flow, large equipment occupation, incomplete devolatilization, unstable volatile index control, high gel content of the product, and low bulk density.

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