JPS54111569A - Preparation of porous polytetrafluoroethylene molded article - Google Patents
Preparation of porous polytetrafluoroethylene molded articleInfo
- Publication number
- JPS54111569A JPS54111569A JP1866278A JP1866278A JPS54111569A JP S54111569 A JPS54111569 A JP S54111569A JP 1866278 A JP1866278 A JP 1866278A JP 1866278 A JP1866278 A JP 1866278A JP S54111569 A JPS54111569 A JP S54111569A
- Authority
- JP
- Japan
- Prior art keywords
- molded article
- foaming agent
- article
- drawn
- ptfe
- 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
Abstract
PURPOSE: To prepare a porous PTFE molded article having uniform pore size and excellent mechanical strength and dimensional stability, by molding a mixture of PTFE powders, a foaming agent and a liquid lubricant, drawing the molded article, and foaming and simultaneously heat-treating the drawn article.
CONSTITUTION: A composition composed of 100 parts by weight of PTFE powders, 0.1W15 parts of a foaming agent, and 5W50 parts of a liquid lubricant, is extrusion- or compression-molded to a desired form. The molded article is uni- or bi-axially drawn by 20W700% at a temperature below the decomposition temperature of the foaming agent, and the drawn article is heated at a temperature between the decomposition temperature of the foaming agent and the melting point of the PTFE resin for 1W30 minutes to decompose the foaming agent, and, at the same time, to skrink the drawn article along at least one of the drawing directions by 20W90%; and the objective porous PTFE molded article having a porosity of 20W85% and a pore size range of 0.01W100μ is obtained.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1866278A JPS54111569A (en) | 1978-02-20 | 1978-02-20 | Preparation of porous polytetrafluoroethylene molded article |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1866278A JPS54111569A (en) | 1978-02-20 | 1978-02-20 | Preparation of porous polytetrafluoroethylene molded article |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54111569A true JPS54111569A (en) | 1979-08-31 |
JPS5730372B2 JPS5730372B2 (en) | 1982-06-28 |
Family
ID=11977814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1866278A Granted JPS54111569A (en) | 1978-02-20 | 1978-02-20 | Preparation of porous polytetrafluoroethylene molded article |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54111569A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62279920A (en) * | 1986-05-28 | 1987-12-04 | Daikin Ind Ltd | Porous heat-shrinkable tetrafluoroethylene polymer pipe and its manufacture |
US6683255B2 (en) * | 2000-01-28 | 2004-01-27 | 3M Innovative Properties Company | Extruded polytetrafluoroethylene foam |
WO2007096472A1 (en) * | 2006-02-24 | 2007-08-30 | Conenor Oy | Method and apparatus for producing plastic film |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3281511A (en) * | 1964-05-15 | 1966-10-25 | Gen Plastics Corp | Method of preparing microporous tetrafluoroethylene resin sheets |
JPS4844664A (en) * | 1971-01-06 | 1973-06-27 | ||
JPS5226547A (en) * | 1975-08-25 | 1977-02-28 | Showa Electric Wire & Cable Co Ltd | Method for storing silicone-grafted polyolefin molding composition |
-
1978
- 1978-02-20 JP JP1866278A patent/JPS54111569A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3281511A (en) * | 1964-05-15 | 1966-10-25 | Gen Plastics Corp | Method of preparing microporous tetrafluoroethylene resin sheets |
JPS4844664A (en) * | 1971-01-06 | 1973-06-27 | ||
JPS5226547A (en) * | 1975-08-25 | 1977-02-28 | Showa Electric Wire & Cable Co Ltd | Method for storing silicone-grafted polyolefin molding composition |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62279920A (en) * | 1986-05-28 | 1987-12-04 | Daikin Ind Ltd | Porous heat-shrinkable tetrafluoroethylene polymer pipe and its manufacture |
JPH0533650B2 (en) * | 1986-05-28 | 1993-05-20 | Daikin Ind Ltd | |
US6683255B2 (en) * | 2000-01-28 | 2004-01-27 | 3M Innovative Properties Company | Extruded polytetrafluoroethylene foam |
WO2007096472A1 (en) * | 2006-02-24 | 2007-08-30 | Conenor Oy | Method and apparatus for producing plastic film |
Also Published As
Publication number | Publication date |
---|---|
JPS5730372B2 (en) | 1982-06-28 |
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