POLYLACTIC ACID-BASED RESIN COMPOSITION AND FOAM AND MANUFACTURING PROCESS OF THE FOAM

摘要

PROBLEM TO BE SOLVED: To provide a resin compound for extrusion foaming the main raw material of which is a commercially easily available crystalline polylactic acid resin, a highly expandable polylactic acid-based foam composed of the resin compound and a safe and stable manufacturing process of the foam only using chemically stable carbon dioxide for expanding gas.;SOLUTION: The polylactic acid-based resin composition mainly consists of a crystalline polylactic acid which has a crystal melting enthalpy (ΔHm) after crystallization by vacuum dry heat treatment at 100°C for 72 hours of ≥2 J/g and ≤35 J/g and melt viscosity at 190°C and 60 sec^-1 of 10³-10⁵ Pa×S.;COPYRIGHT: (C)2005,JPO&NCIPI