JPS57128211A - Preparation of regenerated hollow cellulosic fiber - Google Patents
Preparation of regenerated hollow cellulosic fiberInfo
- Publication number
- JPS57128211A JPS57128211A JP1020681A JP1020681A JPS57128211A JP S57128211 A JPS57128211 A JP S57128211A JP 1020681 A JP1020681 A JP 1020681A JP 1020681 A JP1020681 A JP 1020681A JP S57128211 A JPS57128211 A JP S57128211A
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- solution
- regenerated
- spinneret
- dimethylacetamide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Artificial Filaments (AREA)
Abstract
PURPOSE: To obtain the titled fibers, having improved uniformity without pinholes, and useful for hemodialysis, etc., by extruding a cellulosic ester solution of specific substitution degree through the outer annular part of a spinneret of double pipe structure, wet spinning the solution, and saponifying the resultant fibers.
CONSTITUTION: A cellulosic ester having an acyl group substitution degree ≥2.7, e.g. cellulose acetate, is dissolved in a nonvolatile organic solvent, e.g. dimethylacetamide, to give a spinning solution, which is then extruded through the outer annular part of a spinneret having a double pipe structure while extruding a core solution, e.g. a mixed solution of ethanol-dimethylacetamide, simultaneously through the inner pipe part, and the extruded fibers are then led to a coagulating bath, e.g. an aqueous solution of dimethylformamide, and wet molded at 5°C or below to give hollow fibers. The resultant fibers are saponified and regenerated to afford the aimed regenerated hollow cellulosic fibers. A hemodialytic membrane of high safety without fear for dissolving out of toxic substances due to the absence of a swelling agent.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1020681A JPS57128211A (en) | 1981-01-28 | 1981-01-28 | Preparation of regenerated hollow cellulosic fiber |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1020681A JPS57128211A (en) | 1981-01-28 | 1981-01-28 | Preparation of regenerated hollow cellulosic fiber |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57128211A true JPS57128211A (en) | 1982-08-09 |
Family
ID=11743790
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1020681A Pending JPS57128211A (en) | 1981-01-28 | 1981-01-28 | Preparation of regenerated hollow cellulosic fiber |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57128211A (en) |
-
1981
- 1981-01-28 JP JP1020681A patent/JPS57128211A/en active Pending
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