| 摘要 |
PROBLEM TO BE SOLVED: To provide a polypropylene-based resin composition having excellent resistance to colliding, excellent appearance of a molded article and specifically with scarce formation of flow marks, and also to provide an injection molded product from the same. SOLUTION: The polypropylene-based resin composition comprises: 60-94.9 wt.% of a propylene ethylene block copolymer (A) consisting of 75-60 wt.% of a propylene homopolymer part and 25-40 wt.% of a propylene-ethylene random copolymer part or the same % of a mixture of the above (A) with at most 20 wt.% of a propylene homopolymer; 0.1-15 wt.% of a resin (B) with the melt tension of at least 0.03 N, the swelling ratio of at least 1.5 and requiring at least 5 seconds to show a relaxation modulus of G(t), which satisfies the formula of G(t)/G(0.02)=0.01, timed from the beginning of the measurement when the relaxation modulus is measured at 210°C; and 5-25 wt.% of an inorganic filler. The injection molded product is prepared from the above composition. COPYRIGHT: (C)2005,JPO&NCIPI
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