Title:
POROUS MEMBRANE AND COMPOSITE POROUS MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2020/262490
Kind Code:
A1
Abstract:
A porous membrane according to the present invention contains a branched polyvinylidene fluoride-based resin and a hydrophilic resin, wherein regarding the intensity ratio A/A' of a hydrophilic resin-derived peak intensity A to a polyvinylidene fluoride-based resin-derived peak intensity A', as detected by infrared spectroscopic measurement at intervals of 5 μm from the surface of the porous membrane in the thickness direction, the maximum value of the intensity ratios A/A' at four points of 5, 10, 15, and 20 μm from the dense surface of the porous membrane in the thickness direction is greater than the maximum value of the intensity ratios A/A' at three points of 25, 30, and 35 μm in the thickness direction, and the average value of the intensity ratios A/A' at five points of 5, 10, 15, 20, and 25 μm from the dense surface in the thickness direction is 0.90-1.20.
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Inventors:
SATO RYO (JP)
HANAKAWA MASAYUKI (JP)
IWAI KENTA (JP)
SHIMURA SHUN (JP)
HANAKAWA MASAYUKI (JP)
IWAI KENTA (JP)
SHIMURA SHUN (JP)
Application Number:
PCT/JP2020/024906
Publication Date:
December 30, 2020
Filing Date:
June 24, 2020
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B01D69/00; B01D69/10; B01D69/12; B01D71/34
Domestic Patent References:
| WO2010032808A1 | 2010-03-25 | |||
| WO2017217446A1 | 2017-12-21 |
Foreign References:
| JP2016510688A | 2016-04-11 | |||
| JP2006326497A | 2006-12-07 | |||
| JP2018008272A | 2018-01-18 | |||
| JP2000505719A | 2000-05-16 | |||
| JP2014076446A | 2014-05-01 | |||
| JP2020104104A | 2020-07-09 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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