| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated polycarbonate resin foamed sheet which is lightweight, and has improved bending strength, good surface appearance and smooth surface, and a manufacturing method thereof. SOLUTION: A laminated polycarbonate resin foamed sheet is formed by laminating polycarbonate resin films or sheets A, A' and A", and polycarbonate resin foamed bodies B and B' in an order of A, B, B', and A', or A, B, A", B' and A'. Melting tensions of the polycarbonate resins forming the A and A' layers at 250 deg.C are 2.0 g or higher, each thickness of the A and A' layers is 10-750μm, a thickness of the A" layer is 10-1500μm, each density of B and B' layers is 0.06-0.6 g/cm<3> and each thickness thereof is 0.5-15 mm, each center line average roughness of the surface of the A and A' layers is 3.0μm or lower, and a bending strength Y (kg/cm<2> ) of the foamed sheet satisfies an expression Y>266X<2> +147X, wherein X is an apparent density (g/cm<3> ) of the foamed sheet. |
