JPS6434407A - Porous membrane of polytetrafluoroethylene-base resin and production thereof - Google Patents
Porous membrane of polytetrafluoroethylene-base resin and production thereofInfo
- Publication number
- JPS6434407A JPS6434407A JP62193322A JP19332287A JPS6434407A JP S6434407 A JPS6434407 A JP S6434407A JP 62193322 A JP62193322 A JP 62193322A JP 19332287 A JP19332287 A JP 19332287A JP S6434407 A JPS6434407 A JP S6434407A
- Authority
- JP
- Japan
- Prior art keywords
- polytetrafluoroethylene
- membrane
- liquid
- base resin
- pore diameter
- 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.)
- Granted
Links
Landscapes
- Molding Of Porous Articles (AREA)
- Artificial Filaments (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
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.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62193322A JPS6434407A (en) | 1987-07-30 | 1987-07-30 | Porous membrane of polytetrafluoroethylene-base resin and production thereof |
DE8888906883T DE3878899T2 (en) | 1987-07-30 | 1988-07-28 | POROESE POLYTETRAFLUORAETHYLENE MEMBRANE, SEPARATING DEVICE USING THIS MEMBRANE AND METHOD FOR THE PRODUCTION THEREOF. |
EP88906883A EP0343247B1 (en) | 1987-07-30 | 1988-07-28 | Porous polytetrafluoroethylene membrane, separating apparatus using same, and process for their production |
PCT/JP1988/000755 WO1989000879A1 (en) | 1987-07-30 | 1988-07-28 | Porous polymetrafluoroethylene membrane, separating apparatus using same, and process for their production |
US07/358,205 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 |
US07/918,060 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 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62193322A JPS6434407A (en) | 1987-07-30 | 1987-07-30 | Porous membrane of polytetrafluoroethylene-base resin and production thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6434407A 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 |
---|---|---|---|
JP62193322A Granted JPS6434407A (en) | 1987-07-30 | 1987-07-30 | Porous membrane of polytetrafluoroethylene-base resin and production thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6434407A (en) |
Cited By (7)
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 | Manufacture of high precision electronic components using 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 lifter of the arm type |
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)
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 | Sumitomo Metal Ind Ltd | 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 |
-
1987
- 1987-07-30 JP JP62193322A patent/JPS6434407A/en active Granted
Patent Citations (9)
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 | Sumitomo Metal Ind Ltd | 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)
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 | Manufacture of high precision electronic components using 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 lifter of the arm type |
Also Published As
Publication number | Publication date |
---|---|
JPH0468010B2 (en) | 1992-10-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |