| 摘要 |
<p>PURPOSE:To obtain a laminated board for an electric use excellent in a high frequency characteristic, humidity resistance, water resistance and heat resistance, by forming a continuous fluorocarbon resin layer between substrates and both outer surfaces thereof. CONSTITUTION:In obtaining a laminated board for an electric use by laminating and molding a predetermined number of resin impregnated substrates, as each resin impregnated substrate, one, which is obtained by impregnating a substrate with a tetrafluoroethylene resin and melting said resin under heating, is used and a fluorocarbon resin layer is interposed between resin impregnated substrates and provided to each of both outer surfaces thereof. As the fluorocarbon resin layer, a fluorocarbon resin film comprising a tetrafluoroethylene resin, a tetrafluoroethylene/hexafluoropropylene copolymer resin or a tetrafluoroethylene/ perfluoroalkylvinyl ether copolymer resin is used. As the substrate, glass cloth, glass nonwoven cloth or paper is used. By this constitution, a high frequency characteristic, humidity resistance, water resistance, drill processability, a cutting property, punching processability and heat resistance become excellent.</p> |
