POLYLACTIC ACID RESIN FOAM AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a good-quality polylactic acid resin foam having a uniform and fine foam, particularly a foam of high magnification and high closed cell ratio by the extrusion foaming of the polylactic acid resin. SOLUTION: The extrusion foaming is carried out by selecting and using the amorphous polylactic acid resin having a melt viscosity ranging from 1.0×10<8> to 3.0×10<6> PaS at 75 deg.C and ranging from 1.0×10<6> to 3.0×10<5> PaS at 100 deg.C, and by using a hydrocarbon and carbon dioxide as foaming agents.