Patent ID: 6475596
Filing Date: 2002-11-05
Classification: B29C,B32B,C08J,D03D,D10B,Y10T

Abstract:
A fiber reinforced composite structure, comprising:a laminate adhered to a core, said laminate being formed from at least one core crush resistant prepreg, said prepreg comprising: a woven fabric consisting essentially of carbon fiber tow strands impregnated with a hardenable polymeric resin composition, said fabric having an areal weight of from about 150 to about 400 grams per square meter, said resin composition having an average epoxy functionality of greater than 2.0, and a tan &dgr; of between about 1.0 and about 2.0 at 70Â° C., between about 0.7 and about 2.0 at 100Â° C., and between about 0.5 and about 2.0 at 140Â° C. or the highest temperature of minimum resin viscosity; and said prepreg having an average fiber tow aspect ratio of less than about 15.5 , a prepreg thickness of at least about 0.245 mm, and a prepreg openness of from about 1.0% to about 10%.