| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite laminated sheet reduced in the addition of a phosphorus compound, containing no halogen, having fire retardancy and sufficient in heat resistance and metal foil release strength. SOLUTION: A surface layer comprising an epoxy resin impregnated glass fiber fabric, a core layer comprising an epoxy resin impregnatged glass fiber nonwoven fabric and an uppermost surface metal foil are integrated by heating pressure molding. The epoxy resin composition of the surface layer contains (A) a bisphenol F epoxy resin, (B) a phenol resin containing a nitrogen atom in its molecular structure, (C) a phosphorous compound contained so that the content of a phosphorus atom in the resin solid of the surface layer becomes 0.5-0.9 mass %, (D) an inorganic filler and ((E) a curing accelerator as essential components. In the epoxy resin composition of the core layer, (b) a phenol resin containing a phosphorus atom in its molecular structure is used in place of (B). The content of the phosphorus atom in the resin solid of the laminated sheet is set to 2-3 mass %. |
