The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 1997
Filed:
Jan. 21, 1993
Takashi Tomita, Hiroshima, JP;
Masakatsu Ohsugi, Hiroshima-ken, JP;
Yushi Matsuda, Hiroshima, JP;
Mitsuharu Kaneko, Hiroshima, JP;
Keita Sasaki, Hiroshima, JP;
Kazuhisa Toh, Kure, JP;
Masayasu Nishihara, Hiroshima, JP;
Kenji Moriwaki, Hiroshima-ken, JP;
Mazda Motor Corporation, Hiroshima-ken, JP;
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.