Title:
【発明の名称】熱可塑性ポリマーの濾過方法
Document Type and Number:
Japanese Patent JP3316119
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent a molten polymer from becoming thermally deteriorated due to its residence and eliminate an operating complicacy by decreasing the outer diameter of a leaf disc filter on the extreme downstream side of a polymer flow in a housing than the outer diameter of another filter, and arranging the leaf disc filter in such a manner that its outer diameter does not enlarge toward the downstream side. SOLUTION: The outer diameters of 1 to 5 pieces of lead disc filter 31', 31"... from the extreme downstream side of a polymer flow in a housing 1 are smaller than those of other filters. In addition, the leaf disc filters are arranged in such a manner that their outer diameters do not enlarge toward the downstream side. In this case, it is preferred that the inner diameter of the housing 1 be reducible in compliance with the outer diameters of the filters on the downstream side. Further, the leaf disc filters 31', 31"... should be arranged so that their outer diameters do not enlarge toward the downstream side of a molten polymer flow, and preferably become gradually smaller toward the downstream side. Besides, the inner surface of a flange connected to the housing 1 is spaced almost constantly with the filters of smaller outer diameter.
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Inventors:
Norio Takagi
Uenoyama Masaki
Uenoyama Masaki
Application Number:
JP31392895A
Publication Date:
August 19, 2002
Filing Date:
December 01, 1995
Export Citation:
Assignee:
Teijin Limited
International Classes:
B01D29/39; B01D35/02; C08J3/00; (IPC1-7): B01D29/39; B01D35/02; C08J3/00
Domestic Patent References:
| JP6090017A | ||||
| JP5252781U | ||||
| JP4616872B1 | ||||
| JP6505669A |
Attorney, Agent or Firm:
Sumihiro Maeda