PRODUCTION OF LAMINATED SHEET

PURPOSE:To enable the no-pressure continuous production of a laminated sheet reduced in warpage quantity by continuously molding a long laminate obtained by laminating long foil to the upper or lower surface of a required number of long resin impregnated base materials under heating and no-pressure and cutting the molded one into a required dimension. CONSTITUTION:Two long vinyl ester resin impregnated glass fabric base materials each obtained by impregnating a long glass fabric with a thickness of 0.15mm and a width of 105cm with a vinyl ester resin from the upper surface of the fabric so as to set a resin amt. to 45% are arranged on upper and rear surfaces of one long vinyl ester resin impregnated nonwoven fabric base material. A required number of the units thus obtained are laminated and long copper foils with a width of 105cm and a thickness of 0.035mm are further laminated to the upper and rear surfaces of the obtained laminate. The long laminate is heated and molded at 100 deg.C for 20min under no-pressure and cut into a 100cm square to continuously obtain a laminated sheet with a thickness of 1.2mm.