JPS54111568A - Preparation of porous polytetrafluoroethylene molded article - Google Patents

Preparation of porous polytetrafluoroethylene molded article

Info

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
Application number
JP1866178A
Other languages
Japanese (ja)
Other versions
JPS5730371B2 (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 JP1866178A priority Critical patent/JPS54111568A/en
Publication of JPS54111568A publication Critical patent/JPS54111568A/en
Publication of JPS5730371B2 publication Critical patent/JPS5730371B2/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 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
JP1866178A 1978-02-20 1978-02-20 Preparation of porous polytetrafluoroethylene molded article Granted JPS54111568A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* 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
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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