| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polyester composition designed to suppress rise in filter pressure in undergoing fiber/film manufacture and accomplish stable operability. SOLUTION: This polyester composition is such one that a polyester is produced by polycondensation reaction between a terephthalic acid-based dicarboxylic acid component and an ethylene glycol-based diol component in the presence of calcium acetate to form internal particles. For the internal particles, particles whose size is 0.8 time or less the average size of the internal particles account for≥35 vol.% of the total particles while particles whose size is 1.4 times or greater account for≤20 vol.% of the total particles. COPYRIGHT: (C)2005,JPO&NCIPI
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