Patent ID: 8513341

Claim:
A polylactic acid resin composition, comprising: 100 parts by weight of a polylactic acid compound (A) having a weight average molecular weight (Mw) of 5,000 to 500,000, 5 to 2,000 parts by weight of a lactic acid resin (B) containing 50% by mole or more of L-lactic acid units and 0.1 to 10 parts by weight of at least one kind of a transparent nucleating agent (C) selected from carboxylic acid amides, aliphatic alcohols and aliphatic carboxylic acid esters, wherein the polylactic acid compound (A) is obtained by copolymerizing at least one compound having a soft segment selected from polyalkylene glycols and polycarbonates having hydroxyl groups at both terminals with a monomer containing L-lactide or L-lactic acid as a main component, wherein the compound having a soft segment contains an aliphatic hydrocarbon group having a weight average molecular weight of 25 to 50,000 without containing a ring structure, and the hydrocarbon group may contain an oxygen atom, a nitrogen atom or a sulfur atom, and wherein the carboxylic acid amide is at least one kind selected from the group consisting of lauric acid amide, palmitic acid amide, stearic acid amide, erucic acid amide, behenic acid amide, ricinoleic acid amide, hydroxystearic acid amide, N-oleylpalmitic acid amide, N-stearylerucic acid amide, ethylene biscapric acid amide, ethylene bislauric acid amide, ethylene bisstearic acid amide, ethylene bisoleic acid amide, hexamethylenebiscapric acid amide, hexamethylenebislauric acid amide, hexamethylenebisstearic acid amide, hexamethylenebisoleic acid amide, hexamethylene-bis-12-hydroxystearic acid amide, m-xylylene-bis-capric acid amide, m-xylylene-bis-lauric acid amide, m-xylylene-bis-stearic acid amide, m-xylylene-bis-oleic acid amide and m-xylylene-bis-12-hydroxystearic acid amide.