BIODEGRADABLE RESIN COMPOSITION, PACKAGING MATERIAL, METHOD FOR PRODUCING BIODEGRADABLE RESIN COMPOSITION AND METHOD FOR IMPROVING ELASTIC MODULUS OF THE BIODEGRADABLE RESIN COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a biodegradable resin composition having improved elastic modulus by compounding synthetic mica in an aliphatic polyester resin. SOLUTION: This resin is obtained by compounding 0.5-20.0 wt.% synthetic mica in polylactic acid as an aliphatic polyester resin. The synthetic mica is preferably nonswelling mica. A carbodiimide compound (0.1-2.0 wt.% per resin) is preferably compounded in the polylactic acid as an additive for suppressing hydrolysis of the polylactic acid. The biodegradable resin composition is preferably aged at 80-130 deg.C for 30-180 s. The biodegradable resin is useful as a raw material for household electric appliances and packaging materials and the like.