JPS6434407A - Porous membrane of polytetrafluoroethylene-base resin and production thereof - Google Patents

Porous membrane of polytetrafluoroethylene-base resin and production thereof

Info

Publication number
JPS6434407A
JPS6434407A JP19332287A JP19332287A JPS6434407A JP S6434407 A JPS6434407 A JP S6434407A JP 19332287 A JP19332287 A JP 19332287A JP 19332287 A JP19332287 A JP 19332287A JP S6434407 A JPS6434407 A JP S6434407A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
membrane
polytetrafluoroethylene
liquid
pore diameter
base resin
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.)
Withdrawn
Application number
JP19332287A
Other versions
JPH0468010B2 (en )
Inventor
Takashi Kawai
Tomoko Katsu
Toshio Yoshioka
Original Assignee
Toray Industries
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

Links

Abstract

PURPOSE:To obtain a separation membrane wherein control of pore diameter is made easy and membrane thickness can be made thin by constituting the separation membrane of a porous membrane of polytetrafluoroethylene-base resin which consists of a fine porous network structure having a specified average pore diameter. CONSTITUTION:A uniform raw liquid is obtained by adding the aq. soln. of a fiber formable polymer such as sodium alginate to an aqueous dispersion in which polytetrafluoroethylene is dispersed in an aqueous medium contg. a surfactant. This raw liquid is extruded through a mouthpiece for hollow yarn together with core liquid consisting of a coagulating liquid such as a calcium chloride aq. soln. and coagulated in the coagulating liquid and washed with water and thereafter heat-treated at the temp. not lower than m.p. of the resin. This molded form is immersed into the mixed liquid of sulfuric acid and nitric acid to remove the fiber formable polymer and washed with water to obtain a porous hollow yarn membrane. Whereby the porous membrane of polytetrafluoroethylene-base resin which consists of a fine porous network structure having 0.01-2mu average pore diameter is obtained.
JP19332287A 1987-07-30 1987-07-30 Expired - Fee Related JPH0468010B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19332287A JPH0468010B2 (en) 1987-07-30 1987-07-30

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP19332287A JPH0468010B2 (en) 1987-07-30 1987-07-30
DE19883878899 DE3878899D1 (en) 1987-07-30 1988-07-28 Porous polytetrafluoroethylene membrane, separation apparatus using this membrane and process for making.
DE19883878899 DE3878899T2 (en) 1987-07-30 1988-07-28 Porous polytetrafluoroethylene membrane, separation apparatus using this membrane and process for making.
PCT/JP1988/000755 WO1989000879A1 (en) 1987-07-30 1988-07-28 Porous polymetrafluoroethylene membrane, separating apparatus using same, and process for their production
EP19880906883 EP0343247B1 (en) 1987-07-30 1988-07-28 Porous polytetrafluoroethylene membrane, separating apparatus using same, and process for their production
US07358205 US5158680A (en) 1987-07-30 1989-05-30 Polytetrafluoroethylene resin porous membrane, separator making use of the porous membrane and methods of producing the porous membrane and the separator
US07918060 US5286324A (en) 1987-07-30 1992-07-24 Polytetrafluoroethylene resin porous membrane, separator making use of the porous membrane and methods of producing the porous membrane and the separator

Publications (2)

Publication Number Publication Date
JPS6434407A true true JPS6434407A (en) 1989-02-03
JPH0468010B2 JPH0468010B2 (en) 1992-10-30

Family

ID=16305977

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19332287A Expired - Fee Related JPH0468010B2 (en) 1987-07-30 1987-07-30

Country Status (1)

Country Link
JP (1) JPH0468010B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02284634A (en) * 1989-04-26 1990-11-22 Toray Ind Inc Production of porous membrane of polytetrafluoroethylene resin and production of membrane separation apparatus with the same membrane
US5217666A (en) * 1991-05-29 1993-06-08 Daikin Industries Ltd. Process for producing porous polytetrafluoroethylene film
JP3001634B2 (en) * 1991-03-19 2000-01-24 スターテック ベンチャーズ インコーポレイテッド Production of highly precise electronic component using an ultra high purity liquid
US6214173B1 (en) 1996-06-05 2001-04-10 Air Liquide Electronics Chemicals & Services, Inc. On-site manufacture of ultra-high-purity nitric acid
DE112009000693T5 (en) 2008-03-24 2011-03-24 NTN Corporation, Osaka-shi Lash adjuster
DE112010004871T5 (en) 2009-12-18 2012-11-22 Ntn Corporation Valve lifters of Armtyps
JPWO2011016410A1 (en) * 2009-08-06 2013-01-10 住友電気工業株式会社 Water treatment apparatus and water treatment method

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5071759A (en) * 1973-10-26 1975-06-13
JPS5140902A (en) * 1974-10-04 1976-04-06 Fujitsu Ltd Jikikirokubaitainohogomaku
JPS5342794A (en) * 1976-09-29 1978-04-18 Shimadzu Corp Magnetic defectoscope for internal wall defect
JPS5378269A (en) * 1976-12-20 1978-07-11 Ici Ltd Production of porous polytetrafluoroethylene article
JPS56159128A (en) * 1980-05-15 1981-12-08 Asahi Chem Ind Co Ltd Thermoplastic resin porous film and production thereof
JPS5898105A (en) * 1981-12-07 1983-06-10 Toray Ind Inc Fluoride type wet separation membrane and preparation thereof
JPS59178228A (en) * 1983-03-28 1984-10-09 Sumitomo Electric Ind Ltd Method and apparatus for preparing porous material of ethylene tetrafluoride resin
JPS61166824U (en) * 1985-04-08 1986-10-16
JPS62106808A (en) * 1985-11-01 1987-05-18 Asahi Chem Ind Co Ltd Porous membrane of ethylene-tetrafluoroethylene copolymerizate and its preparation

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5071759A (en) * 1973-10-26 1975-06-13
JPS5140902A (en) * 1974-10-04 1976-04-06 Fujitsu Ltd Jikikirokubaitainohogomaku
JPS5342794A (en) * 1976-09-29 1978-04-18 Shimadzu Corp Magnetic defectoscope for internal wall defect
JPS5378269A (en) * 1976-12-20 1978-07-11 Ici Ltd Production of porous polytetrafluoroethylene article
JPS56159128A (en) * 1980-05-15 1981-12-08 Asahi Chem Ind Co Ltd Thermoplastic resin porous film and production thereof
JPS5898105A (en) * 1981-12-07 1983-06-10 Toray Ind Inc Fluoride type wet separation membrane and preparation thereof
JPS59178228A (en) * 1983-03-28 1984-10-09 Sumitomo Electric Ind Ltd Method and apparatus for preparing porous material of ethylene tetrafluoride resin
JPS61166824U (en) * 1985-04-08 1986-10-16
JPS62106808A (en) * 1985-11-01 1987-05-18 Asahi Chem Ind Co Ltd Porous membrane of ethylene-tetrafluoroethylene copolymerizate and its preparation

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02284634A (en) * 1989-04-26 1990-11-22 Toray Ind Inc Production of porous membrane of polytetrafluoroethylene resin and production of membrane separation apparatus with the same membrane
JP3001634B2 (en) * 1991-03-19 2000-01-24 スターテック ベンチャーズ インコーポレイテッド Production of highly precise electronic component using an ultra high purity liquid
USRE37972E1 (en) 1991-03-19 2003-02-04 American Air Liquide, Inc. Manufacture of high precision electronic components with ultra-high purity liquids
US5217666A (en) * 1991-05-29 1993-06-08 Daikin Industries Ltd. Process for producing porous polytetrafluoroethylene film
US6214173B1 (en) 1996-06-05 2001-04-10 Air Liquide Electronics Chemicals & Services, Inc. On-site manufacture of ultra-high-purity nitric acid
DE112009000693T5 (en) 2008-03-24 2011-03-24 NTN Corporation, Osaka-shi Lash adjuster
JPWO2011016410A1 (en) * 2009-08-06 2013-01-10 住友電気工業株式会社 Water treatment apparatus and water treatment method
DE112010004871T5 (en) 2009-12-18 2012-11-22 Ntn Corporation Valve lifters of Armtyps

Also Published As

Publication number Publication date Type
JPH0468010B2 (en) 1992-10-30 grant

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees