Patent ID: 6861468

Claim:
A polyester resin composition comprising: a thermoplastic polyester resin, a polyester copolymer containing a monomer having at least one of an amino group, an imino group, an amido group, and a sulfonic acid group, a layerd silicate, and an antioxidant, wherein: the monomer having at least one of an amino group, an imino group, an amido group, and a sulfonic acid group is contained in the polyester copolymer in an amount of 5 to 15 mol %; the monomer having at least one of an amino group, an imino group, an amido group, and a sulfonic acid group is contained in the polyester resin composition in an amount of 1 to 5 mol % based on a total polyester content of the polyester resin composition; and the antioxidant is contained in the polyester resin composition in an amount of 0.01% to 1.0% by mass.