JPS56136825A - Preparation of selectively permeable film - Google Patents

Preparation of selectively permeable film

Info

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
Application number
JP4081380A
Other languages
Japanese (ja)
Inventor
Tsukasa Ochiumi
Takashi Ichinose
Keiji Nakamoto
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.)
Nitto Denko Corp
Original Assignee
Nitto Electric Industrial Co 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 Nitto Electric Industrial Co Ltd filed Critical Nitto Electric Industrial Co Ltd
Priority to JP4081380A priority Critical patent/JPS56136825A/en
Publication of JPS56136825A publication Critical patent/JPS56136825A/en
Pending legal-status Critical Current

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
JP4081380A 1980-03-29 1980-03-29 Preparation of selectively permeable film Pending JPS56136825A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (9)

* Cited by examiner, † Cited by third party
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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