Method for preparing a liquid crystal resin composite material and molding a product from the same
US5626703A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1993 |
| Grant date | May 6, 1997 |
| Priority date | — |
| Expiry date | Jan 21, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.