Patent ID: 7235287
Filing Date: 2007-06-26
Classification: B32B,C08L,Y10T

Abstract:
1. A biodegradable laminated sheet comprising at least two layers, each of said two layers comprising: a resin composition containing 75 to 25 mass percent of a polylactic acid resin, and 25 to 75 mass percent of a polyester resin having a glass transition temperature not exceeding 0 degrees C, and having a melting point higher than the glass transition temperature of said polylactic acid resin, and not exceeding the melting point of said polylactic acid resin, based on 100 mass percent of the total amount of said polylactic acid resin and said polyester resin, wherein the content Da (%) of D-lactic acid of the polylactic acid resin contained in one of said at least two layers and the content Db (%) of D-lactic acid of the polylactic acid resin contained in the other of said at least two layers satisfy the following relations (1): said laminated sheet being subjected to crystallization treatment.