| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester composition effective for efficiently producing a blow-molded article having excellent transparency, pressure resistance or high-temperature dimensional stability, especially a blow-molded article having excellent heat resistance by a high-speed molding process while suppressing the formation of aldehydes such as acetaldehyde and cyclic ester oligomers in molding, by using a polyester composition having a water-content falling within a specific range and composed of a polyester having low water-content and a polyester having high water-content and having an intrinsic viscosity difference falling within a specific range. SOLUTION: The polyester composition contains a polyester A having a water-content of≤100 ppm and a polyester B having a water-content of 0.05-0.6 wt.% as main components. The composition of the polyester A is essentially same as that of the polyester B, the intrinsic viscosity difference of the polyesters is 0.05-0.40 dL/g and the water-content of the polyester composition is 10-700 ppm. COPYRIGHT: (C)2007,JPO&INPIT
|
