| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polypropylene compsn. improved in the impact resistance, clarity, and moldability after being exposed toγ-rays. SOLUTION: This compsn. comprises 100 pts.wt. resin component and 0.10-0.5 pt.wt. sorbitol-based clarifier. The resin component is prepd, by degrading a resin compsn. comprising 2-10wt.% propylene homopolymer having a melt flow rate of 30-80g/10min or propylene-ethylene random copolymer having an ethylene content of 1wt.% or lower and 90-98wt.% propylene-ethylene random copolymer having a melt flow rate of 0.5-15g/10min and an ethylene content of 2.5-5wt.% with a free radical generator so that the melt flow rate of the compsn. after the degradation is at least doubled, pref. at a rate of 100g/10min or lower.
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