Resin impregnated sheet

Abstract

Abstract PURPOSE:To obtain the title sheet having both excellent heat-resistant dimension al stability and water vapor-resistant dimensional stability, by impregnating aromatic polyamide yarn having specific physical properties with a resin. CONSTITUTION:Aromatic polyamide yarn having <=-1X10<-6>/ deg.C temperature linear thermal coefficient of expansion alphaTf, <=-2X10<-6>%RH humidity linear thermal coefficient of expansion, >=7,000kg/cm<2> modulus in tension Ef and <=2wt.% equilibrium water content Ew is impregnated with a resin to give the aimed sheet having <=10X10<-6>/ deg.C temperature linear thermal coefficient of expansion in the plane direction alphaTc and <=10X10<-6>/ deg.C humidity thermal coefficient of expansion in the plane direction alphaHC. Yarn obtained by sufficiently drawing a totally aromatic polyether amide copolymer to highly orientate the molecule is preferable as the totally aromatic polyether amide copolymer. A polyfunctional epoxy specific is preferable as the resin to be impregnated.

Inventors

• 👤 Kunio Nishimura
• 👤 邦夫 西村
• 👤 Tadashi Hirakawa
• 👤 董 平川

Bibliographic Details