JPS54111568A - Preparation of porous polytetrafluoroethylene molded article - Google Patents
Preparation of porous polytetrafluoroethylene molded articleInfo
- Publication number
- JPS54111568A JPS54111568A JP1866178A JP1866178A JPS54111568A JP S54111568 A JPS54111568 A JP S54111568A JP 1866178 A JP1866178 A JP 1866178A JP 1866178 A JP1866178 A JP 1866178A JP S54111568 A JPS54111568 A JP S54111568A
- Authority
- JP
- Japan
- Prior art keywords
- foaming agent
- ptfe
- molded article
- parts
- article
- 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
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
PURPOSE: To prepare a porous PTFE molded article having uniform pore size and excellent mechanical properties and dimensional stability, by the successive molding, foaming, drawing and heat-shrinking of a composition composed of PTFE powders, a foaming agent and a liquid lubricant.
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% while heating at a temperature above the decomposition temperature of the foaming agent and below the melting point of PTFE resin thereby decomposing the foaming agent. The foamed drawn article is heated below the melting point of PTFE resin, and let to shrink by 20W90% along at least one of the drawing directions. The resulting porous article having a porousity of 20W90% and a pore size of 0.01W100μ, is heat-treated while restricting the shrinkage along the orientation direction.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1866178A JPS54111568A (en) | 1978-02-20 | 1978-02-20 | Preparation of porous polytetrafluoroethylene molded article |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1866178A JPS54111568A (en) | 1978-02-20 | 1978-02-20 | Preparation of porous polytetrafluoroethylene molded article |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54111568A true JPS54111568A (en) | 1979-08-31 |
JPS5730371B2 JPS5730371B2 (en) | 1982-06-28 |
Family
ID=11977786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1866178A Granted JPS54111568A (en) | 1978-02-20 | 1978-02-20 | Preparation of porous polytetrafluoroethylene molded article |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54111568A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56159128A (en) * | 1980-05-15 | 1981-12-08 | Asahi Chem Ind Co Ltd | Thermoplastic resin porous film and production thereof |
JPS62279920A (en) * | 1986-05-28 | 1987-12-04 | Daikin Ind Ltd | Porous heat-shrinkable tetrafluoroethylene polymer pipe and its manufacture |
WO2007096472A1 (en) * | 2006-02-24 | 2007-08-30 | Conenor Oy | Method and apparatus for producing plastic film |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59314U (en) * | 1982-06-25 | 1984-01-05 | 三菱自動車工業株式会社 | Engine air intake device |
JPS59315U (en) * | 1982-06-25 | 1984-01-05 | 三菱自動車工業株式会社 | window equipment |
JPS593985U (en) * | 1982-06-30 | 1984-01-11 | 三菱自動車工業株式会社 | window equipment |
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 JP1866178A patent/JPS54111568A/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 |
---|---|---|---|---|
JPS56159128A (en) * | 1980-05-15 | 1981-12-08 | Asahi Chem Ind Co Ltd | Thermoplastic resin porous film and production thereof |
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 | |
WO2007096472A1 (en) * | 2006-02-24 | 2007-08-30 | Conenor Oy | Method and apparatus for producing plastic film |
Also Published As
Publication number | Publication date |
---|---|
JPS5730371B2 (en) | 1982-06-28 |
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