JPS54111569A - Preparation of porous polytetrafluoroethylene molded article - Google Patents

Preparation of porous polytetrafluoroethylene molded article

Info

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
Application number
JP1866278A
Other languages
Japanese (ja)
Other versions
JPS5730372B2 (en
Inventor
Kanji Kawakami
Yasuhiro Moriyama
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 JP1866278A priority Critical patent/JPS54111569A/en
Publication of JPS54111569A publication Critical patent/JPS54111569A/en
Publication of JPS5730372B2 publication Critical patent/JPS5730372B2/ja
Granted legal-status Critical Current

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
JP1866278A 1978-02-20 1978-02-20 Preparation of porous polytetrafluoroethylene molded article Granted JPS54111569A (en)

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)

* Cited by examiner, † Cited by third party
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)

* 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
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

Patent Citations (3)

* 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
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)

* Cited by examiner, † Cited by third party
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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