Title:
POROUS MEMBRANE AND METHOD FOR MANUFACTURING POROUS MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2023/054228
Kind Code:
A1
Abstract:
Conventional porous membranes had a mesh structure having a relatively large pore diameter in order to improve the removability of a relatively large component such as a virus. When a filtration raw liquid that is easily stained was filtered, contaminants were easily accumulated in the porous membranes, clogging or the like occurred in the porous membranes, and contamination of the porous membranes easily occurred. Accordingly, the purpose of the present invention is to provide a porous membrane having high contamination resistance and high-precision removability. To achieve the purpose, provided is a porous membrane wherein, in at least one surface, a surface part spanning from the surface to a position at a thickness of 10 μm is denser than the inside and has a removal rate T of dextran having a weight-average molecular weight of 40,000 Da of 60-95%, and the number of surface holes per unit area observed on the surface of the surface part is 200 holes/μm2 to 2,000 holes/μm2.
Inventors:
SHIMURA SHUN (JP)
SATO RYO (JP)
HANAKAWA MASAYUKI (JP)
KITABATA MASAHIRO (JP)
YAMAMOTO NAOKI (JP)
SATO RYO (JP)
HANAKAWA MASAYUKI (JP)
KITABATA MASAHIRO (JP)
YAMAMOTO NAOKI (JP)
Application Number:
PCT/JP2022/035592
Publication Date:
April 06, 2023
Filing Date:
September 26, 2022
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B01D69/00; B01D69/08; B01D69/12; B01D71/16; B01D71/34
Domestic Patent References:
| WO2020262490A1 | 2020-12-30 | |||
| WO2018182027A1 | 2018-10-04 | |||
| WO2016031834A1 | 2016-03-03 |
Foreign References:
| JPH01176407A | 1989-07-12 | |||
| JP2006082006A | 2006-03-30 | |||
| JP2010094670A | 2010-04-30 |
Other References:
KOZENY-CARMAN, JOURNAL OF THE JAPANESE ASSOCIATION FOR PETROLEUM TECHNOLOGY, vol. 75, no. 2, March 2010 (2010-03-01), pages 164 - 176
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H. C. ANDERSEN, J. CHEM. PHYS, vol. 72, 1980, pages 2384
S. L. MAYOB. D. OLAFSONW. A. GODDARD III, J. PHYS. CHEM, vol. 94, 1990, pages 8897
J. WANGR. M. WOLFJ. W. CALDWELLP. A. KOLLMAND. A. CASE, J. COMPUT. CHEM, vol. 25, 2004, pages 1157
W. L. JORGENSEND. S. MAXWELLJULIAN TIRADO-RIVES, J. AM. CHEM. SOC., vol. 118, 1996, pages 11225
B. R. BROOKSR. E. BRUCCOLERIB. D. OLAFSOND. J. STATESS. SWAMINATHANM. KARPLUS, J. COMPUT. CHEM, vol. 4, 1983, pages 187
HOOVER, W. G., PHYS. REV. A, vol. 31, 1985, pages 1695
H. C. ANDERSEN, J. CHEM. PHYS, vol. 72, 1980, pages 2384
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