| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester resin composition capable of obtaining a blow molded article having excellent heat stability and transparency with good productivity without causing a problem of whitening by draw down or crystallization during blow molding, and to provide a polyester resin composition having excellent recyclability so that an edge material of the polyester resin once generated during blow molding can be molded favorably even when used for blow molding again.SOLUTION: There is provided a polyester resin composition which is a resin composition containing ethylene terephthalate as a main repeating unit and mainly comprising a polyester resin containing 2 to 20 mol% of 1,4-cyclohexane dicarboxylic acid as a copolymerization component, in which the intrinsic viscosity is 0.7 to 1.4, the ratio between the weight average molecular weight and the number average molecular weight (weight average molecular weight/number average molecular weight) is 1.9 to 2.5 and the carboxyl terminal group concentration is 20 equivalent/t or less. There is provided a polyester resin having a cyclic trimer content of 0.6 mass% or less. |
