Process for extruding thermotropic liquid crystalline polymers

Details Process for extruding thermotropic liquid crystalline polymers Process for extruding thermotropic liquid crystalline polymers

1983-04-28

1984-08-28

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264176F, B28B 320

Patent

active

044683642

ABSTRACT:
Provided is a process for the extrusion of shaped articles which comprises extruding a thermotropic liquid crystal polymer through a short land or preferably no land die, and with subsequent drawdown of the extruded profile being such as to render a drawdown ratio of less than 4, and preferably about 1. Such extrusion of liquid crystal polymers in accordance with the present invention can consistently and reproducibly provide one with an article of high mechanical properties, and thus, particular advantage is found in employing the process to extrude an article of cross-sectional dimensions which must closely approximate those of the extrusion die without sacrificing high mechanical properties.

REFERENCES:
patent: 4183895 (1980-01-01), Luise

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