| 摘要 |
A polylactic acid resin foamed molding obtained by placing in a mold a cylindrical body having a foamed layer, which is formed by extruding a foamable molten resin composition prepared by kneading together a polylactic acid resin and a physical blowing agent from a die into a low-pressure zone, and molding it, wherein the molding's foamed layer constituting the foamed molding has a difference (&Dgr;Hendo:2° C./min−&Dgr;Hexo:2° C./min) between the endothermic calorific value (&Dgr;Hendo:2° C./min) and the exothermic calorific value (&Dgr;Hexo:2° C./min) obtained by heat flux differential scanning calorimetry (heating rate of 2° C./min) of 10 J/g or more and a melt tension at 190° C. of 2 cN or more.
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