JPS5476668A - Production of porous polytetrafluoroethylene film - Google Patents

Production of porous polytetrafluoroethylene film

Info

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
Application number
JP14434577A
Other languages
Japanese (ja)
Other versions
JPS5730061B2 (en
Inventor
Kanji Kawakami
Yasuhiro Moriyama
Nobufumi Okamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitto Denko Corp
Original Assignee
Nitto Electric Industrial Co Ltd
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
Application filed by Nitto Electric Industrial Co Ltd filed Critical Nitto Electric Industrial Co Ltd
Priority to JP14434577A priority Critical patent/JPS5476668A/en
Publication of JPS5476668A publication Critical patent/JPS5476668A/en
Publication of JPS5730061B2 publication Critical patent/JPS5730061B2/ja
Granted legal-status Critical Current

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
JP14434577A 1977-11-30 1977-11-30 Production of porous polytetrafluoroethylene film Granted JPS5476668A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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