JPS5476668A - Production of porous polytetrafluoroethylene film - Google Patents
Production of porous polytetrafluoroethylene filmInfo
- Publication number
- JPS5476668A JPS5476668A JP14434577A JP14434577A JPS5476668A JP S5476668 A JPS5476668 A JP S5476668A JP 14434577 A JP14434577 A JP 14434577A JP 14434577 A JP14434577 A JP 14434577A JP S5476668 A JPS5476668 A JP S5476668A
- Authority
- JP
- Japan
- Prior art keywords
- film
- blowing agent
- production
- parts
- polytetrafluoroethylene film
- 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 obtain the title film at a relatively low draw ratio and a high porosity, by rolling polytetrafluoroethylene together with a blowing agent, and by drawing the foamed film under specific conditions.
CONSTITUTION: A blend of 100 parts by wt. of polytetrafluoroethylene, 0.1W15 parts by wt. of a blowing agent, and an adequate amount of a liquid lubricant is rolled into a film, which is heated to decompose the blowing agent. The microporous film is uniaxially drawn in the direction perpendicular to the long direction to increase the porosity of the film, thus giving a microporous film. The film thus obtained is heat-treated, if necessary.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14434577A JPS5476668A (en) | 1977-11-30 | 1977-11-30 | Production of porous polytetrafluoroethylene film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14434577A JPS5476668A (en) | 1977-11-30 | 1977-11-30 | Production of porous polytetrafluoroethylene film |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5476668A true JPS5476668A (en) | 1979-06-19 |
JPS5730061B2 JPS5730061B2 (en) | 1982-06-26 |
Family
ID=15359939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14434577A Granted JPS5476668A (en) | 1977-11-30 | 1977-11-30 | Production of porous polytetrafluoroethylene film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5476668A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012033752A (en) * | 2010-07-30 | 2012-02-16 | Nitto Denko Corp | Wiring circuit board and method of manufacturing the same |
Citations (2)
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 |
JPS52130162A (en) * | 1976-04-23 | 1977-11-01 | Matsushita Electric Ind Co Ltd | Dehydratig washer |
-
1977
- 1977-11-30 JP JP14434577A patent/JPS5476668A/en active Granted
Patent Citations (2)
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 |
JPS52130162A (en) * | 1976-04-23 | 1977-11-01 | Matsushita Electric Ind Co Ltd | Dehydratig washer |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012033752A (en) * | 2010-07-30 | 2012-02-16 | Nitto Denko Corp | Wiring circuit board and method of manufacturing the same |
US9288903B2 (en) | 2010-07-30 | 2016-03-15 | Nitto Denko Corporation | Printed circuit board and method of manufacturing the same |
Also Published As
Publication number | Publication date |
---|---|
JPS5730061B2 (en) | 1982-06-26 |
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