| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester resin composition from which a blow-molded article excellent in thermal stability and transparency can be obtained with high productivity without causing a drawdown problem or a whitening problem due to crystallization and which has such excellent recyclability that even an odd material generated at a molding step can be blow-molded again in a good state.SOLUTION: The polyester resin composition contains a polyester resin as a principal component, which resin contains: ethylene terephthalate as a main repeating unit; and 2-20 mol% of 1,4-cyclohexanedimethanol as a copolymerization component. The polyester resin composition has: 0.7-1.4 intrinsic viscosity; 4-10 of a ratio (&eegr;e/&eegr;) of the elongational viscosity (&eegr;e) to the shear viscosity (&eegr;) at 500 sshear rate in an elongational viscosity-shear rate curve obtained when the elongational viscosity is measured at 300°C; and 20 equivalent/ton or lower carboxyl end group concentration. |
