Patent ID: 6261675
Filing Date: 2001-07-17
Classification: B29C,B32B,C08J,D03D,D10B,Y10T

Abstract:
A core crush resistant prepreg for use in making a fiber reinforced composite structure, 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 .delta. of between about 1.0 and about 2.0 at 70.degree. C., between about 0.7 and about 2.0 at 100.degree. C., and between about 0.5 and about 2.0 at 140.degree. C. or the highest temperature of minimum resin viscosity; andsaid prepreg having an average fiber tow aspect ratio of less than about 15.5.