Title:
COMPOSITE HOLLOW FIBER MEMBRANE, AND METHOD FOR PRODUCING COMPOSITE HOLLOW FIBER MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2019/131304
Kind Code:
A1
Abstract:
One aspect of the present invention is a composite hollow fiber membrane provided with a semipermeable membrane layer and a hollow-fiber-like porous support layer, wherein the semipermeable membrane layer contains a crosslinked polyamide polymer formed from a polyfunctional amine compound and a polyfunctional acid halide compound, the support layer has a gradient structure such that the sizes of cells in the support layer gradually increase in a direction from one of an inner surface and an outer surface of the support layer toward the other, the fractionated particle diameter is 0.001 to 0.3 μm, a crosslinked hydrophilic resin is contained in at least a dense surface which corresponds to one of the inner surface and the outer surface in which the cells are smaller, and the semipermeable membrane layer comes into contact with the dense surface in the support layer.
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Inventors:
YABUNO YOUHEI (JP)
KOMATSU KENSAKU (JP)
SHIMAMURA SHIGETAKA (JP)
HAMADA KENICHI (JP)
KOMATSU KENSAKU (JP)
SHIMAMURA SHIGETAKA (JP)
HAMADA KENICHI (JP)
Application Number:
PCT/JP2018/046462
Publication Date:
July 04, 2019
Filing Date:
December 18, 2018
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
B01D69/08; B01D69/02; B01D69/10; B01D69/12; B01D71/34; B01D71/38; B01D71/44; B01D71/56; B01D71/68; B32B5/18; B32B27/34; C08G69/26
Domestic Patent References:
| WO2015146469A1 | 2015-10-01 | |||
| WO2016114051A1 | 2016-07-21 | |||
| WO2014133133A1 | 2014-09-04 | |||
| WO2014050701A1 | 2014-04-03 |
Foreign References:
| US20140175006A1 | 2014-06-26 | |||
| JPH09512857A | 1997-12-22 | |||
| JP2000015067A | 2000-01-18 | |||
| JP2013545593W | ||||
| JP2017251938A | 2017-12-27 |
Other References:
See also references of EP 3733269A4
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (JP)
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