Polylactic acid resin composition and film

Abstract

Provided is a polylactic acid resin composition useful as a molding material and a packaging material. The polylactic acid resin composition comprises a resin composition (l) comprising poly-L-lactic acid having an L-isomer content of 90-100 mol % as the main component and a resin composition (d) comprising poly-D-lactic acid having a D-isomer content of 90-100 mol % as the main component, the resin compositions (l) and (d) having been alternately stacked so that each layer has a thickness of 0.01-2.5 μm. The polylactic acid resin composition has specific thermal properties, can be used at high temperatures even after high-temperature melt molding, and can give molded polylactic acid articles having excellent suitability for various kinds of processing, such as printing, and having excellent transparency, etc. Also provided is a stretched polylactic acid resin film obtained by heating the polylactic acid resin composition to 280° C. or higher, subsequently cooling the composition, thereafter forming the polylactic acid resin composition into a film, and then stretching the film in at least one direction. This film can be used at high temperatures and has excellent suitability for various kinds of processing, excellent transparency, etc.