| 摘要 |
PURPOSE:To improve interlayer exfoliation strength, soldering heat resistivity, a hygroscopic property of a laminated plate by pre-treating the glass cloth of the outermost layer in advance with a specific radical polymerized type hardenable resin solution, and using the above-mentioned specific resin mixed solution as an impregnating resin. CONSTITUTION:A glass cloth base material is pretreated with a mixed solution of an epoxyacrylate resin solution and an urethaneacrylate resin solution. At least two layers of base material lines on both outer sides of which the glass clothes are arranged, are parallely and continuously conveyed, and a radical polymerized type hardenable epoxyacrylate resin solution, which is liquid in itself and does not generate a reaction product upon hardening or a mixture solution of an epoxyacrylate resin and an unsaturated polyester resin, is individually impregnated in the base material lines. The resultant products are stacked and integrated, subjected to lamination of cover sheets and/or metal foils thereon and continuously hardened, followed by being cut in a desired dimension so as to produce an electrical laminated plate. |
