Method and machine for producing multiaxial fibrous webs

Details Method and machine for producing multiaxial fibrous webs Method and machine for producing multiaxial fibrous webs

D - Textiles, Paper

04

H

D04H 13/00 (2006.01) D04H 3/04 (2006.01)

Patent

CA 2285379

A plurality of unidirectional sheets (30a, 30b, 30c) are superposed in different directions and they are bonded together. At least one of the unidirectional sheets is made by spreading a tow so as to obtain uniform thickness, width not less than 5 cm, and a weight of no more than 300 g/m2, cohesion being imparted to the sheet so as to enable it to be handled prior to being superposed with other sheets. Advantageously, the unidirectional sheets are made of carbon fibers and are obtained by spreading out large tows.

Plusieurs nappes unidirectionnelles (30a, 30b, 30c) sont superposées dans des directions différentes et liées entre elles. Au moins l'une des nappes unidirectionnelles est réalisée par étalement d'un câble jusqu'à obtenir une épaisseur uniforme, une largeur au moins égale à 5 cm et une masse surfacique au plus égale à 300 g/m<2>, une cohésion étant conférée à la nappe pour pouvoir la manipuler avant superposition avec d'autres nappes. Avantageusement, les nappes undirectionnelles sont en fibres de carbone et obtenues par étalement de câbles lourds.

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