| 摘要 |
PROBLEM TO BE SOLVED: To provide a composition excellent in the impact strength and heat resistance of the gate portion of a molded product as well as impact strength at low temperature.SOLUTION: The aliphatic polyester-based polymer composition comprises 1 to 45 mass% of an aliphatic polyester-based polymer (A), 40 to 93 mass% of a propylene-based polymer (B), 1 to 15 mass% of an ethylene-based polymer (C) containing an epoxy group, and 5 to 30 mass% of an elastomer (D), wherein the elastomer (D) comprises an ethylene-butene copolymer with a melt flow rate of 0.1 to 0.45 g/10 min and an ethylene-octene copolymer with a melt flow rate of 3.5 to 20 g/10 min, and, assuming that the total amount of the ethylene-butene copolymer and the ethylene-octene copolymer is 100 wt.%, the ethylene-butene copolymer is 15 to 45 wt.% and the ethylene-octene copolymer is 55 to 85 wt.%. |
