Patent ID: 8445628

Claim:
A copolymer resin composition comprising: a lactic acid copolymer, the lactic acid copolymer containing monomer units represented by the following chemical formulas [1], [2], and [3], wherein a content of a monomer unit represented by the chemical formula [1] is 4 mol %, a content of a monomer unit represented by the chemical formula [2] is 1 mol %, a content of a monomer unit represented by the chemical formula [3] is 95 mol %, a weight-average molecular weight of the lactic acid copolymer is 20,000 or more and 1,000,000 or less, and a deflection temperature of the lactic acid copolymer under load is 65° C. or higher and 100° C. or lower at a bending stress of 1.80 MPa; and the copolymer resin composition further comprising a crystallization nucleating agent, wherein the crystallization nucleating agent comprises at least one of nucleating agents composed of a metal salt-type material having a phenyl group and benzoyl-type nucleating agents.