| 摘要 |
PROBLEM TO BE SOLVED: To provide a film-like molding prepared by molding an aliphatic polyester biodegradable resin which is industrially suppliable and has practical physical properties. SOLUTION: The aliphatic polyester biodegradable resin composition comprises a high molecular weight aliphatic polyester copolymer (a) composed of a repeating unit (P) in which the molecular chain is expressed by formula (1): (-CO-R<1> -COO-R<2> -O-) and a repeating unit (Q) in which the molecular chain is expressed by formula (2): (-CO-R<3> -O-), or a high molecular weight polyester copolymer having a weight average molecular weight of 40,000 or more prepared by coupling a low molecular weight aliphatic polyester copolymer (D), which is a polymerization intermediate of the high molecular weight aliphatic polyester copolymer (a), with a bifunctional coupling agent (E), or a mixture thereof with another biodegradable resin (b). The aliphatic polyester biodegradable resin composition is molded into a film.
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