Title:
POROUS HOLLOW FIBER MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2017/146211
Kind Code:
A1
Abstract:
The objective of the present invention is to provide a porous hollow fiber membrane which achieves a good balance between high strength and high pure water permeability, while having excellent bending resistance. The present invention relates to a porous hollow fiber membrane which is formed from a fluororesin-based polymer and has a columnar structure that is oriented in the longitudinal direction of the porous hollow fiber membrane, and which satisfies the requirements (1) and (2) described below if a photograph of a cross-section of the porous hollow fiber membrane, said cross-section being parallel to the longitudinal direction of the porous hollow fiber membrane, is subjected to binarization processing with respect to the structural part and the pore parts.
(1) The area ratio of the pore parts is from 20% to 50% (inclusive).
(2) The value obtained by dividing the total perimeter of the pore parts by the total area of the pore parts is 2.0 μm-1 or less.
Inventors:
YASUDA TAKAAKI (JP)
HANAKAWA MASAYUKI (JP)
IWAI KENTA (JP)
ISHIZAKI TOSHIYUKI (JP)
HANAKAWA MASAYUKI (JP)
IWAI KENTA (JP)
ISHIZAKI TOSHIYUKI (JP)
Application Number:
PCT/JP2017/007117
Publication Date:
August 31, 2017
Filing Date:
February 24, 2017
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B01D71/32; B01D69/00; B01D69/02; B01D69/08
Domestic Patent References:
| WO2004081109A1 | 2004-09-23 | |||
| WO2016104743A1 | 2016-06-30 |
Foreign References:
| JP2006297383A | 2006-11-02 | |||
| JP2003210954A | 2003-07-29 | |||
| JP2003320228A | 2003-11-11 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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