Process for improving the processing properties of powdery polyo

Details Process for improving the processing properties of powdery polyo Process for improving the processing properties of powdery polyo

1978-10-19

1981-02-03

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

264118, 264126, 264176R, B29J 500

Patent

active

042488192

ABSTRACT:
The invention relates to a process for improving the processing properties of powdery polyolefins. It is endeavored by this process to obtain a polyolefin powder which can be processed on screw extruders to an almost bubble-free product.
The polyolefin powder is heated to a temperature of between 40.degree. C. and its melting point and introduced into a gap between two gap-forming elements. In this gap, the powder is compressed with a pressure of from 0.1 to 10 t per cm of gap length, and the powder so compressed is then comminuted.

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