发明名称 |
Process for producing polyester resin powder, process for producing polyester preform and apparatus for heat-treatment of polyester resin powder |
摘要 |
The present invention relates to a process for producing polyester resin powder by heat-treatment thereof comprising holding the polyester resin powder in plural vessels and subjecting the polyester resin powder to contact with a heated gas, which process comprises repeating the steps of: (a) supplying a certain amount of polyester resin powder to said treatment vessels, (b) carrying out heat-treatment of said polyester resin powder by supplying the heated gas to said treatment vessels for a certain period of time and (C) discharging the treated polyester resin powder from said treatment vessels; and which process carries out said steps (a), (b) and (c) successively with a different operational phase for each treatment vessel. By this process, it is possible to attain effective heat-treatment of resin powder and more homogeneous quality of products.
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申请公布号 |
US2006036067(A1) |
申请公布日期 |
2006.02.16 |
申请号 |
US20050206307 |
申请日期 |
2005.08.18 |
申请人 |
MITSUBISHI CHEMICAL CORPORATION |
发明人 |
KIMURA HISASHI |
分类号 |
C08F6/00;C08C2/06;C08G63/88;C08J3/12 |
主分类号 |
C08F6/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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