| 摘要 |
<p>PURPOSE:To obtain a laminated sheet excellent in capacity by the uniform impregnation with a resin by superposing resin impregnated base material after the contact impregnation with a resin varnish each other and laminating a metal foil to the upper or lower surface of the superposed one to perform molding. CONSTITUTION:A long strip like base material is used and, pref., glass cloth or paper having high thickness control effect is desirable. As resin varnish, an unsaturated polyester resin, a vinyl ester resin, an epoxy resin, a phenol resin, a polyimide resin, a modified resin or a mixture thereof can be used. The resin amount of a resin impregnated base material is 5-20wt.%, pref., 40-60wt.% as a whole in contact impregnation. In single surface impregnation from an upper surface, an impregnation method by casting, spraying, transfer or coating is used and the casting method is desirably used because the air contained in the base material is easily reduced. As a metal foil, a single or composite foil composed of copper, aluminum or iron is used.</p> |
