JPS56136825A - Preparation of selectively permeable film - Google Patents
Preparation of selectively permeable filmInfo
- Publication number
- JPS56136825A JPS56136825A JP4081380A JP4081380A JPS56136825A JP S56136825 A JPS56136825 A JP S56136825A JP 4081380 A JP4081380 A JP 4081380A JP 4081380 A JP4081380 A JP 4081380A JP S56136825 A JPS56136825 A JP S56136825A
- Authority
- JP
- Japan
- Prior art keywords
- film
- under heating
- vinyl alcohol
- solvent
- ethylene
- 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)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
PURPOSE: To obtain the titled permeable film having improved penetrating properties of micropores and high water penetration rate, by dissolving an ethylene-vinyl alcohol type copolymer in a specific mixed solvent under heating, clouding it at low temperature, followed by making a film by a wet method.
CONSTITUTION: An ethylene-vinyl alcohol type copolymer (preferably vinyl alcohol content 50W80mol%) is dissolved in a mixed solvent of its poor solvent (e.g., water, THF, etc.) and 1W4C aliphatic alcohol under heating preferably at 50W 100°C. The prepared dope is maintained at a temperature lower than the temperature in the dissolution under heating, preferably 10°C lower than it so that the dope is clouded and has a per cent transmission 3W35%, and it is processed into a film by a wet method, to give the desired film. The concentration of the above-mentioned copolymer is preferably 12W40g based on 100ml solvent.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4081380A JPS56136825A (en) | 1980-03-29 | 1980-03-29 | Preparation of selectively permeable film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4081380A JPS56136825A (en) | 1980-03-29 | 1980-03-29 | Preparation of selectively permeable film |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56136825A true JPS56136825A (en) | 1981-10-26 |
Family
ID=12591084
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4081380A Pending JPS56136825A (en) | 1980-03-29 | 1980-03-29 | Preparation of selectively permeable film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56136825A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5328724A (en) * | 1993-09-02 | 1994-07-12 | E. I. Du Pont De Nemours And Company | Solution coating process for packaging film |
JP2001079370A (en) * | 1999-09-14 | 2001-03-27 | Kuraray Co Ltd | Film-forming stock solution and production of ethylene- vinyl alcohol polymer film |
WO2003031038A1 (en) * | 2001-10-04 | 2003-04-17 | Toray Industries, Inc. | Hollow fiber film and method for production thereof |
JP2008105019A (en) * | 2006-09-29 | 2008-05-08 | Toray Ind Inc | Porous film and its manufacturing method |
-
1980
- 1980-03-29 JP JP4081380A patent/JPS56136825A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5328724A (en) * | 1993-09-02 | 1994-07-12 | E. I. Du Pont De Nemours And Company | Solution coating process for packaging film |
JP2001079370A (en) * | 1999-09-14 | 2001-03-27 | Kuraray Co Ltd | Film-forming stock solution and production of ethylene- vinyl alcohol polymer film |
WO2003031038A1 (en) * | 2001-10-04 | 2003-04-17 | Toray Industries, Inc. | Hollow fiber film and method for production thereof |
JPWO2003031038A1 (en) * | 2001-10-04 | 2005-01-20 | 東レ株式会社 | Hollow fiber membrane and method for producing the same |
US7182870B2 (en) | 2001-10-04 | 2007-02-27 | Toray Industries, Inc. | Hollow fiber membrane and method of producing the same |
CN100443148C (en) * | 2001-10-04 | 2008-12-17 | 东丽株式会社 | Hollow fiber film and method for prodn thereof |
US7504034B2 (en) | 2001-10-04 | 2009-03-17 | Toray Industries, Inc. | Hollow fiber membrane and method of producing the same |
KR100904943B1 (en) | 2001-10-04 | 2009-06-29 | 도레이 카부시키가이샤 | Hollow fiber film and method for production thereof |
JP2008105019A (en) * | 2006-09-29 | 2008-05-08 | Toray Ind Inc | Porous film and its manufacturing method |
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