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 production

Info

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
Application number
JP4776381A
Other languages
Japanese (ja)
Inventor
Kiyoshi Kitagawa
Junkichi Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unitika Ltd
Original Assignee
Unitika Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Unitika Ltd filed Critical Unitika Ltd
Priority to JP4776381A priority Critical patent/JPS57162607A/en
Publication of JPS57162607A publication Critical patent/JPS57162607A/en
Pending legal-status Critical Current

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  • 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
JP4776381A 1981-03-30 1981-03-30 Polyvinyl alcohol dialysis membrane having no elongation or contraction in water and its production Pending JPS57162607A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (6)

* Cited by examiner, † Cited by third party
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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