In order production mannered null optical purity 95 or more

摘要

PROBLEM TO BE SOLVED: To obtain a molded article which is prepared by subjecting a sheet comprising a polylactic acid and a neucleating agent to heat treatment and which is excellent in heat resistance and impact resistance.;SOLUTION: The molded article consists of a crystalline polylactic acid resin (A) having an optical purity of 95% or higher, an aromatic/aliphatic copolyester or aliphatic polyester (B) having a glass transition temperature of 0°C or lower, and a talc (C) having a mean particle diameter of 1-8 μm. The ratio of the resin (A) to the polyester (B) is (97:3) to (80:20) by mass, and the talc (C) accounts for 1-30 mass% of the whole composition. The molded article has a crystallization index, which is a difference in absolute values between the heat of crystal fusion ΔHm measured by a differential scanning calorimeter at a temperature-rise rate of 20°C/min and the heat of crystallization for temperature-rise ΔHc, satisfying the relation of formula: (|ΔHm|-|ΔHc|)≥25 J/g, a rate of crystallization at 130°C of 0.010 min^-1 or higher, and a falling ball impact strength, in terms of the height of a falling ball, of 20 cm or higher at a thickness of 500 μm.;COPYRIGHT: (C)2004,JPO&NCIPI