Method for preparing a liquid crystal resin composite material a

Details Method for preparing a liquid crystal resin composite material a Method for preparing a liquid crystal resin composite material a

1993-01-21

1997-05-06

Yoder, Michele K.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

15624424, 26417713, 264178F, B29C 4700

Patent

active

056267037

ABSTRACT:
The present invention relates to a method for preparing a composite material comprising a matrix resin of a thermal plastic resin and a liquid crystal resin which has a liquid crystal transition temperature higher than the minimum temperature of capable of molding said thermal plastic resin and which is formed into a fiber structure as a reinforcing material.
The method is characterized in that the composite composition is subjected to a melt extrusion process at an apparent shear rate of 3.times.10.sup.2 to 10.sup.5 sec.sup.-1 and above the liquid crystal transition temperature. The resulting material in a filament or thin film has fibers of the liquid crystal resin having an aspect of more than 3 in the matrix resin, so that it is provided with an improved tensile strength by further being subjected to a drawing process at a drawing ratio of 11 to 120. As the composite materials have too small diameter or thickness to be molded in a desired product, they are preferably further subjected to a gathering process, a folding process or a laminating process in which a plurality of strand or film materials are welded to each other at the surface thereof and formed into a strand or sheet form capable of molding.

REFERENCES:
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patent: 5006403 (1991-04-01), Isayev
patent: 5043400 (1991-08-01), Tsuruta et al.
patent: 5070157 (1991-12-01), Isayev et al.
patent: 5204443 (1993-04-01), Lee et al.
patent: 5225488 (1993-07-01), Baird et al.
patent: 5395470 (1995-03-01), Toh et al.

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