| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester composition excellent in crystallization- controlling property on melt-molding and long time continuous molding property, and a hollow molded material, sheet material and stretched film obtained from the same excellent in transparency, heat resistant dimensional stability especially having an appropriate range of shrinkage at a mouth part of a hollow molded material and hardly generating a residual foul taste or foul smell on using it as a liquid container. SOLUTION: This polyester composition comprises chips of a polyester having main recurring unit of ehtylene terephthalate with 0.1-5,000 ppm polyester fine and 0.1 ppb-50,000 ppm at least 1 kind of resin selected from the group consisting of a polyolefin resin, polyamide resin and polyacetal resin. The polyester fine exhibits≤265°C melting peak temperature at the highest temperature side of the melting peak temperature in the case of measuring with a DSC, and further, the increased amount of a cyclic trimer is≤0.50 wt.% on melting the polyester composition at 290°C for 60 min. COPYRIGHT: (C)2004,JPO
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