Title:
METHOD FOR MANUFACTURING HOLLOW FIBER MEMBRANE AND NOZZLE FOR HOLLOW FIBER MEMBRANE SPINNING
Document Type and Number:
WIPO Patent Application WO/2017/037912
Kind Code:
A1
Abstract:
The purpose of the present invention is to suppress detachment of membrane forming stock solution outside of a nozzle at a location of attachment covering the outer peripheral surface of a hollow porous base material and occurrences of trouble caused by the same in the manufacturing of a hollow fiber membrane. Provided is a method for manufacturing a hollow fiber membrane having a spinning step of applying a first membrane forming stock solution (3) and a second membrane forming stock solution (4) for forming a porous membrane layer to the outer peripheral surface of a hollow porous base material (2) using a nozzle (1) for hollow fiber membrane spinning and solidifying these membrane forming stock solutions, wherein a draft ratio (VB/VA), which is the ratio of feed velocity VB for hollow porous base material (2) fed out from a base material feed opening (7a) to linear velocity VA for the first membrane forming stock solution (3) and the second membrane forming stock solution (4) discharged from a membrane forming stock solution discharge opening (27a) of the nozzle (1) for hollow fiber membrane spinning, is set to 1 - 6.
Inventors:
MIZUTA MASAHIKO (JP)
SHINADA KATSUHIKO (JP)
SUMI TOSHINORI (JP)
SHINADA KATSUHIKO (JP)
SUMI TOSHINORI (JP)
Application Number:
PCT/JP2015/075054
Publication Date:
March 09, 2017
Filing Date:
September 03, 2015
Export Citation:
Assignee:
MITSUBISHI RAYON CO (JP)
International Classes:
B01D69/08; B01D69/10; B01D69/12; D01D5/24
Domestic Patent References:
| WO2013137438A1 | 2013-09-19 | |||
| WO2010123094A1 | 2010-10-28 |
Foreign References:
| JP2007126783A | 2007-05-24 | |||
| JP2013000619A | 2013-01-07 | |||
| JP2010227932A | 2010-10-14 | |||
| JP2014079709A | 2014-05-08 | |||
| JPH08229358A | 1996-09-10 |
Attorney, Agent or Firm:
SHIGA Masatake et al. (JP)
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