NOVEL THERMOPROTECTIONS OBTAINED BY A FILAMENT WINDING PROCESS AND USE THEREOF
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United States of America Patent
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Jul 30, 2015
app pub date -
May 4, 2012
filing date -
May 6, 2011
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Abstract
A novel composite material is obtained by winding a reinforcing yarn, made of refractory fibers, onto a form, and a mandrel, the wound yarn being impregnated, as it is wound, with a “slip” composed of a liquid resin mixed with fillers composed of particles of refractory material. The reinforcing yarn is composed of linear fibers and of fibers forming protruding loops which confer a three-dimensional texture on the wound reinforcement. The yarn preform composed of the reinforcing yarn impregnated with “slip” is crosslinked according to a defined heating cycle comprising several temperature gradients of different durations. The crosslinked yarn preform is subsequently machined so as to bring the composite material component thus produced to the desired shape. The composite material component thus shaped can optionally be reinforced by overwinding on its external face with a reinforcing yarn preimpregnated with a resin chemically compatible with the resin constituting the material.
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