| 摘要 |
PURPOSE:To improve electrical characteristics and heat resistance without causing breakage of a base material by molding a prepreg obtd. by impregnating the base material made of a glass non-woven fabric with a resin compsn. contg. a phenol resin, an epoxy resin and Al(OH)3 under heat and pressure. CONSTITUTION:A resin compsn. is obtd. by compounding a mixed resin of a phenol resin and an epoxy resin with Al(OH)3. Then, a base material made of a glass non-woven fabric is impregnated with this resin compsn. in such a way that the amount of the resin contg. Al(OH)3 is 50-70wt.% and dried to such an extent that the impregnated resin does not flow when it is molded under heat and pressure. Then, this base material is impregnated again with the resin compsn. in such a way that the total amount of the resin contg. Al(OH)3 is 87-95wt.% and dried. The obtd. prepregs of a specified number are laminated and molded under heat and pressure. |
