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    • 33. 发明专利
    • Crystallization of polyester
    • 聚酯的结晶
    • JPS5925815A
    • 1984-02-09
    • JP13509982
    • 1982-08-04
    • Teijin Ltd
    • SUZUOKA AKIHIROSOGA AKIRAHAYASHI EIKICHI
    • C08G63/00C08G63/78C08G63/88
    • PURPOSE: To carry out the crystallization of polyester granules in an extremely short time, and to prevent the troubles caused by mositure during the drying and solid-phase polymerization process, by treating the polyester granules with steam heated above a specific temperature.
      CONSTITUTION: Granules of a polyester having alkylene terephthalate as the recurring unit (preferably having ethylene terephthalate as recurring unit) are treated with steam (preferably super-heated steam) heated at ≥110°C to effect the crystallization of polyester.
      EFFECT: Agglomeration of pellets during the crystallization process can be prevented, and the energy cost can be reduced.
      COPYRIGHT: (C)1984,JPO&Japio
    • 目的:在极短的时间内进行聚酯颗粒的结晶,并且为了防止在干燥和固相聚合过程中引起的问题,通过在特定温度以上加热的蒸汽处理聚酯颗粒。 构成:用加热至> 110℃的蒸汽(优选超热蒸汽)处理具有对苯二甲酸亚烷基二醇酯作为重复单元(优选具有对苯二甲酸乙二醇酯作为重复单元)的聚酯颗粒,以实现聚酯的结晶。 效果:可以防止结晶过程中颗粒团聚,降低能量成本。