| 摘要 |
<p>PURPOSE:To enhance the bonding strength with glass cloth and to uniformize the thickness of a laminate by extruding molten fluoroplastic on the glass cloth from an extruder to integrate with the glass cloth under pressure. CONSTITUTION:When a plurality of glass cloths are used, weighed molten fluoroplastic is extruded on the glass cloth positioned at the central part and glass cloths and separately prepared fluoroplastic films are alternately arranged on the central glass cloth. A metal foil is arranged to the upper surface and/or rear surface of the outermost part as necessary to perfomt integrating processing. As fluoroplastic to be used, one not capable of flowing without being thermally decomposed at the time of melting under heating is suitable and, as a concrete example, there is a tetrafluoroethylene/perfluoroalkylvinyl ether copolymer. As a concrete example of glass cloth, there is electric alkali free glass cloth or high strength glass cloth and the structure of the glass cloth is formed by plain weaving, twill or satin weave.</p> |
