PROCESS FOR THE EXTRUSION PREPARATION OF THERMOTROPIC POLYMER PROFILES AND INDUSTRIALLY USED PROFILES.

摘要

The present invention relates to a method of preparing profiles suitable for subsequent industrial use, from thermotropic polymers which are capable of forming anisotropic melts. BR/ This process is carried out by carrying out an extrusion operation known to those skilled in the art, but by choosing particular temperature conditions according to which the polymer melts at a temperature T1 greater than the melting temperature TF ( at which appears the liquid crystal phase) is cooled before entering the die at a temperature T2 less than TF. The present invention further relates to profiles made from thermotropic polymers and whose intimate structure is non-fibrillar. BR/ The profiles obtained can in particular be granulated and ground to yield fine and flowable powders which are suitable for example for electrostatic coating.