Title:
CELLULOSE ACETATE-TYPE ASYMMETRIC HOLLOW FIBER MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2018/079807
Kind Code:
A1
Abstract:
[Problem] The purpose of the present invention is to optimize the structure of a dense layer on the inner surface of a hollow fiber membrane and to thereby provide a hollow fiber membrane that can achieve stable performance in response to increases in blood flow rate and filtration rate. [Solution] A hollow fiber membrane comprising a dense layer at least on the inner surface side thereof, said hollow fiber membrane being characterized in that when the inner surface thereof is observed using an atomic force microscope, a plurality of groove-like recesses oriented in the lengthwise direction of the hollow fiber membrane can be observed, an aspect ratio defined as the ratio of the length and the width of the recesses is 3-30, the yield strength of the hollow fiber membrane in a dry state is 30 g/filament or more, and the breaking elongation is 20%/filament or less.
Inventors:
MABUCHI KIMIHIRO (JP)
KOHYAMA HARUHIKO (JP)
TAKII YOSHINORI (JP)
KOHYAMA HARUHIKO (JP)
TAKII YOSHINORI (JP)
Application Number:
PCT/JP2017/039247
Publication Date:
May 03, 2018
Filing Date:
October 31, 2017
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B01D69/08; A61M1/18; B01D63/02; B01D69/02; B01D71/16; D01F1/08; D01F2/28
Domestic Patent References:
| WO2016159333A1 | 2016-10-06 |
Foreign References:
| JP2011212638A | 2011-10-27 | |||
| JPH0655047A | 1994-03-01 | |||
| JP2009095515A | 2009-05-07 | |||
| JP2011078920A | 2011-04-21 |
Other References:
See also references of EP 3533514A4
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