D - Textiles – Paper – 04 – H
Patent
D - Textiles, Paper
04
H
154/70.03
D04H 3/07 (2006.01) B29C 70/14 (2006.01) B29C 70/24 (2006.01) D04H 11/04 (2006.01)
Patent
CA 1275234
ABSTRACT OF THE DISCLOSURE Process for the preparation of a composite material formed of reinforcing fibers, regularly distributed and o- riented in more than two directions, and of a matrix fill- ing up the space between said fibers. According to the invention, said process consists in: producing a convex brush of said reinforcing fibers, regu- larly distributed and fixed by one of their ends on a con- vex base, said fibers being subjected to an intensive D.C. electrostatic field, oriented in parallel to said fibers so that the fibers are immobilized in stretched condition perpendicularly to the base surface; inserting between said fibers, layers or grids of fibers, disposed successively at 90° from one another, said insertion being carried out while the reinforcing fibers fixed on said base are subject ted to the intensive D.C. electrostatic field; removing the elements used for fixing the fibers of the brush; impreg- nating the fibrous structure with a liquid pre-matrix, and optionally subjecting it to a compression for subsequent densification of the resulting pre-material; and finally, subjecting the pre-material to conditions permitting the formation of the matrix.
526491
Berger Michel
Mccarthy Tetrault Llp
Societe de Droit Anglais: Pradom Limited
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