| 摘要 |
PURPOSE: To obtain a polyolefin compsn. improved in injection moldability in such a manner that it is so highly flowable as to give a large and thin-gage molded product without detriment to the properties thereof. CONSTITUTION: This compsn. comprises (1) 50-70wt.% propylene-ethylene block copolymer, (2) 20-40wt.% olefin elastomer, and (3) 15wt.% inorg. filler. The block copolymer (1) has an MFR of 90 to 120g/10min. The olefin elastomer (2) is a compsn. comprising (a) an ethylene-propylene copolymer rubber having a Mooney viscosity of 1 to 30, (b) an ethylene-propylene copolymer rubber having an (a) to (b) Mooney viscosity ratio of 0.01 to 0.6, and (c) an ethylene-α- olefin (except for propylene) copolymer rubber having an MFR of 10 to 50g/10min.
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