Title:
HOLLOW FIBER MEMBRANE SPINNERET AND METHOD OF MANUFACTURING HOLLOW FIBER MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2020/090494
Kind Code:
A1
Abstract:
An objective of the present invention is to provide a hollow fiber membrane spinneret where there is little concern regarding outlet damage as a result of impact, and where fiber breakage is unlikely to occur even at high draft ratios. Another objective is to include the hollow fiber membrane spinneret of the present invention and provide a method for manufacturing a hollow fiber membrane having the separating capability and water permeability performance required for a water filter. To these ends, the present invention is configured as follows. The hollow fiber membrane spinneret of the present invention is a hollow fiber membrane spinneret having, in an outlet face, a double-walled pipe structure where an injection liquid outlet for discharging an injection liquid and an annular slit (spinning dope outlet), surrounding the injection liquid outlet, for discharging spinning dope are formed, wherein an annular recess encompassing the annular slit is further formed in the outlet face.
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Inventors:
TAMIYA RYUTA (JP)
YAMADA MASAYUKI (JP)
UENO YOSHIYUKI (JP)
TANAKA KAZUMI (JP)
YAMADA MASAYUKI (JP)
UENO YOSHIYUKI (JP)
TANAKA KAZUMI (JP)
Application Number:
PCT/JP2019/040860
Publication Date:
May 07, 2020
Filing Date:
October 17, 2019
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B01D69/08; D01D5/24
Foreign References:
| JP2008231639A | 2008-10-02 | |||
| JP2001254221A | 2001-09-21 | |||
| JPS61133390A | 1986-06-20 | |||
| JPS6197412A | 1986-05-15 |
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