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Title:
POROUS HOLLOW FIBER MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2019/225730
Kind Code:
A1
Abstract:
A porous hollow fiber membrane in which a polysulfone-based polymer is used as a main component, wherein the porous hollow fiber membrane has an asymmetrical structure in which the inner-surface side is fine and the outer-surface side is rough, the average value of the minor diameter of pores in the inner surface is 20-40 nm (inclusive), the aperture rate of the inner surface is 10-30% (inclusive), and a monocarboxylic-acid-vinyl-ester-containing polymer is supported on at least one surface from among the outer surface and the inner surface. There is thereby provided a porous hollow fiber membrane that has exceptional performance in terms of removing materials to be separated, such as viruses, and that has high permeability even during low-pressure treatment.

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Inventors:
HAYASHI AKIHIRO (JP)
AKAIKE KAORI (JP)
USHIRO SUGURU (JP)
UENO YOSHIYUKI (JP)
Application Number:
PCT/JP2019/020597
Publication Date:
November 28, 2019
Filing Date:
May 24, 2019
Export Citation:
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Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B01D69/08; B01D69/00; B01D71/40; B01D71/68; C08J9/26; C08J9/42
Domestic Patent References:
WO2009123088A12009-10-08
WO2011111679A12011-09-15
WO2013012024A12013-01-24
WO2016113964A12016-07-21
Foreign References:
JP2014073487A2014-04-24
JP2010053108A2010-03-11
Other References:
See also references of EP 3766567A4
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