| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polycarbonate resin pelt-extruded foam which is excellent in melt-extrusion foaming properties such as melt viscosity and melt tension and shows excellent appearance and moldability. SOLUTION: A composition comprising (A) 100 pts.wt. of a polycarbonate resin, preferably of >=20,000 viscosity average molecular weight and (B) 0. 5-7 pts.wt., preferably 1-5 pts.wt. of a polyolefin resin, preferably a low-density polyethylene is melted and kneaded together with (C) a foaming agent followed by foam extrusion. The resin composition preferably has a melt tension of preferably >=3g, particularly >=4g at 250 deg.C and the melt viscosity of preferably 4.3×10<4> -1.4×10<5> poise, particularly 4.5×10<4> -7.4×10<4> poise. |
