JPS57162607A - Polyvinyl alcohol dialysis membrane having no elongation or contraction in water and its production - Google Patents
Polyvinyl alcohol dialysis membrane having no elongation or contraction in water and its productionInfo
- Publication number
- JPS57162607A JPS57162607A JP4776381A JP4776381A JPS57162607A JP S57162607 A JPS57162607 A JP S57162607A JP 4776381 A JP4776381 A JP 4776381A JP 4776381 A JP4776381 A JP 4776381A JP S57162607 A JPS57162607 A JP S57162607A
- Authority
- JP
- Japan
- Prior art keywords
- polyvinyl alcohol
- water
- contraction
- vertical
- horizontal directions
- 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 Macromolecular Shaped Articles (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
PURPOSE: To eliminate elongation or contraction in water by making the dimensional change when this membrane is immersed in water of 30°C at specific % or below in both vertical and horizontal directions and the coefft. of dialysis of an aq. caustic soda soln. at specific value or above.
CONSTITUTION: The dimensional change when polyvinyl alcohol is immersed in water of 30°C is assumed to be ≤10% in both vertical and horizontal directions and the coefft. of dialysis of an aq. caustic soda at 30°C is assumed to be ≥5× 10-3cm/sec. To manufacture such polyvinyl alcohol film, an amorphous polyvinyl alcohol film of ≥1,000 degree of polymn. and ≥98% saponification value is controlled to 5W25% moisture contents, and is biaxially oriented in vertical and horizontal directions within a 1.2W1.5 times range and is heat treated at 60W 130°C, whereby it is obtd. This film is ideally suited as a diaphragm for alkali recovering dialyzer, battery separators, artificial kidneys, etc.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4776381A JPS57162607A (en) | 1981-03-30 | 1981-03-30 | Polyvinyl alcohol dialysis membrane having no elongation or contraction in water and its production |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4776381A JPS57162607A (en) | 1981-03-30 | 1981-03-30 | Polyvinyl alcohol dialysis membrane having no elongation or contraction in water and its production |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57162607A true JPS57162607A (en) | 1982-10-06 |
Family
ID=12784405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4776381A Pending JPS57162607A (en) | 1981-03-30 | 1981-03-30 | Polyvinyl alcohol dialysis membrane having no elongation or contraction in water and its production |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57162607A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107000270A (en) * | 2014-12-12 | 2017-08-01 | 株式会社可乐丽 | Polyvinyl alcohol film and its manufacture method |
WO2017170484A1 (en) * | 2016-03-30 | 2017-10-05 | 住友化学株式会社 | Method for manufacturing stretch film, and device for manufacturing stretch film |
CN108774327A (en) * | 2018-05-25 | 2018-11-09 | 湖州斯蔓生物材料有限公司 | It is used to prepare the method for PVA hydrogels, using the PVA hydrogels and composite material of its preparation |
-
1981
- 1981-03-30 JP JP4776381A patent/JPS57162607A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107000270A (en) * | 2014-12-12 | 2017-08-01 | 株式会社可乐丽 | Polyvinyl alcohol film and its manufacture method |
CN107000270B (en) * | 2014-12-12 | 2019-08-13 | 株式会社可乐丽 | Polyvinyl alcohol film and its manufacturing method |
WO2017170484A1 (en) * | 2016-03-30 | 2017-10-05 | 住友化学株式会社 | Method for manufacturing stretch film, and device for manufacturing stretch film |
CN108883566A (en) * | 2016-03-30 | 2018-11-23 | 住友化学株式会社 | The manufacturing method of stretched film and the manufacturing device of stretched film |
CN108883566B (en) * | 2016-03-30 | 2021-06-04 | 住友化学株式会社 | Method for producing stretched film and apparatus for producing stretched film |
CN108774327A (en) * | 2018-05-25 | 2018-11-09 | 湖州斯蔓生物材料有限公司 | It is used to prepare the method for PVA hydrogels, using the PVA hydrogels and composite material of its preparation |
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