| 摘要 |
PURPOSE:To obtain a laminated sheet free from generation of a warpage by overlapping a long-sized metallic foil on the upper surfaces and/or the rear surface of the long-sized dry base materials of the required number of sheets which are impregnated with polybutadience resin and curing the long-sized banklike laminatedabody while continuously transferring this laminated body and thereafter cutting the cured body into required dimension and furthermore heating it at the heat distortion temp. or higher and thereafter cooling it at the same temp. or below. CONSTITUTION:As a long-sized dry base material 1 impregnated with polybutadiene resin, inorganic fiber such as glass and asbestos, organic synthetic fiber such as polyester or the base material combined therewith are impregnated with polybutadience resin and utilized. As a metallic foil 2, a single foil of copper, etc., an alloy foil and a composite foil are utilized. As the laminating rolls 3, the rolls made of metal, rubber or synthetic resin are utilized and the surfaces of the metallic rolls are lined with rubber and synthetic resin and the rolls are arbitrarily utilized. As curing 5 of a long-sized banklike laminated body 4, the curing temp. and the curing time can be selected by the kind of resin. It is important that curing is performed at from nonpressure to 20 kg/cm<2>. Heating 7 and cooling 8 after cutting 6 are not especially limited when heating or cooling is performed at the temp. not lower than the heat distortion temp. of the utilized resin or at the temp. not higher than it. Cooling is desirably performed by quenching. |
