| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester composition capable of being suitably used as a raw material for a molded product and a coating material on a base material, including a hollow molded product, a sheet-like product, and an oriented film, which are excellent in transparency and scarcely cause fluctuation of transparency and in which formation of aldehydes, such as acetaldehyde, and fluctuation of the formation are prevented, when molded, and capable of efficiently producing the hollow molded product excellent in pressure resistance and dimensional stability under heat, especially, a hollow molded article excellent in the pressure resistance and pressure resistance under heat, through high-speed molding, and to provide the polyester molded product formed out of the same. SOLUTION: This polyester composition contains at least two kinds of polyesters of which the constitutions are substantially same as main components, wherein a difference of intrinsic viscosity between the polyesters is in a range of 0.05-0.30 dL/g, a difference of crystallization temperature between the polyesters is not more than 15°C when temperature is raised, and a difference of crystallization temperature between the polyesters is not more than 20°C when the temperature is lowered. COPYRIGHT: (C)2006,JPO&NCIPI
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