Patent ID: 6426310
Filing Date: 2002-07-30
Classification: B32B,C08J,D21H,H01L,H05K,Y10S,Y10T

Abstract:
An electrically insulating non-woven fabric for use in a prepreg, a laminate or a printed wiring board comprising para-aramid fiber chops bonded with each other by a binder, said non-woven fabric characterized by said para-aramid fiber chops including chops of poly-p-phenylene-diphenylether-terephthalamide fibers and poly-p-phenylene-terephthalamide fibers with a blend ratio by weight of said poly-p-phenylene-diphenylether-terephthalamide fibers relative to said poly-p-phenylene-terephthalamide fibers ranging from 30/70 to 70/30.