| 摘要 |
PROBLEM TO BE SOLVED: To provide a polypropylene-based resin composition giving an injection foamed molded form having good appearance in good moldability, and to provide the injection foamed molded form. SOLUTION: The polypropylene-based resin composition comprises 50 to 95 wt.% of propylene homopolymer component(A) and 5 to 50 wt.% of at least one ethylene-α-olefin copolymer component(B1), the polypropylene-based resin composition having a melt index of not less than 40 g/10 min but less than 500 g/10 min, provided that the percentages by weight are based on the combined weight of the components(A) and (B1), wherein the homopolymer component(A) has intrinsic viscosity [η]<SB>A</SB>of from 0.5 to 1.4 dL/g, and wherein the ratio of the intrinsic viscosity [η]<SB>B1</SB>of the copolymer component(B1) to the intrinsic viscosity [η]<SB>A</SB>of the homopolymer component(A) , [η]<SB>B1</SB>/[η]<SB>A</SB>, is from 0.5 to 3. The injection foamed molded form of this composition is also provided. COPYRIGHT: (C)2006,JPO&NCIPI |
