Polylactic acid resin composition and polylactic acid resin molded article

A polylactic acid resin composition obtained by melting a mixture comprising 100 parts by weight of a poly-L-lactic acid (A) having an L-lactic acid purity of 99 mol % or more, 2.6 to 10 parts by weight of a plasticizer (B), and 0.41 to 1.0 part by weight of a lubricant (C), then cooling the mixture to 20 to 40° C., and then heating the mixture to 46 to 70° C.,

• wherein the plasticizer (B) is at least one selected from the group consisting of polyethylene glycol and a castor oil-based fatty acid ester, or a mixture thereof,
• the lubricant (C) is at least one selected from the group consisting of ethylene bishydroxystearic acid amide, N-stearyl erucic acid amide, N-stearyl stearic acid amide, and ethylene bisstearic acid amide, or a mixture thereof, and
• the following conditions (a) and (b) are satisfied:
• (a) a haze value at a thickness of 0.3 mm is 5% or less;
• and
• (b) the degree of crystallinity measured by a differential scanning calorimeter is 50 to 70%,
• wherein the degree of crystallinity is obtained by measuring crystallization heat quantity (ΔHc) and melting heat quantity (ΔHm) when the polylactic acid resin composition is heated at a rate of 10° C./min using a differential scanning calorimeter (DSC) and performing a calculation according the following formula:
• degree of crystallinity=(melting heat quantity−crystallization heat quantity)/93×100.