| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polyester composition that efficiently gives a heat-resistant hollow molding having excellent transparency and a molding comprising the same. SOLUTION: The polyester composition comprises chips of a solid-phase polymerization polyester mainly composed of an aromatic dicarboxylic acid component and a glycol component and 0.1-5,000 ppm of fine powder of polyester having the same composition as that of the solid-phase polymerization polyester. The ratio (IVs)/(IV) of the intrinsic viscosity (IVs) of chip surface layer part of the solid-phase polymerization polyester to the intrinsic viscosity (IV) of the chip is 1.05-1.35 and the ratio (IVc)/(IVs) of the intrinsic viscosity (IVc) of the central part of the chip of the solid-phase polymerization polyester to the intrinsic viscosity (IVs) of the chip surface layer part is 0.70-0.95. The polyester composition is mixed with 0.1 ppb-1,000 ppm of at least one kind of a resin selected from the group consisting of a polyolefin resin, a polyamide resin and a polyacetal resin. COPYRIGHT: (C)2005,JPO&NCIPI
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