JPH04351645A - Production of porous polytetrafluoroethylene film with asymmetrical pore diameter - Google Patents

Production of porous polytetrafluoroethylene film with asymmetrical pore diameter

Info

Publication number
JPH04351645A
JPH04351645A JP12594591A JP12594591A JPH04351645A JP H04351645 A JPH04351645 A JP H04351645A JP 12594591 A JP12594591 A JP 12594591A JP 12594591 A JP12594591 A JP 12594591A JP H04351645 A JPH04351645 A JP H04351645A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
film
polytetrafluoroethylene
porous polytetrafluoroethylene
production
pore diameter
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
JP12594591A
Other versions
JP3099416B2 (en )
Inventor
Osamu Inoue
Hirofumi Nishibayashi
Shinji Tamaru
Osamu Tanaka
Katsutoshi Yamamoto
Original Assignee
Daikin Ind 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

Links

Abstract

PURPOSE: To obtain the title film in which the layers are completely integrated and which is excellent in permeability to various gases and liquids.
CONSTITUTION: A process for producing the title film which is a porous polytetrafluoroethylene film made of at least two layers with different mean pore diameters, comprising coating a porous polytetrafluoroethylene film substrate which has not been heated to a temperature equal to or higher than the melting point of an unfired polytetrafluoroethylene with an emulsified polytetrafluoroethylene dispersion, semi-firing the film by heating to a temperature equal to or higher than the melting point of fired polytetrafluoroethylene, and stretching the film at least monoaxially.
COPYRIGHT: (C)1992,JPO&Japio
JP12594591A 1991-05-29 1991-05-29 Method for producing an asymmetric pore size polytetrafluoroethylene membrane Expired - Fee Related JP3099416B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12594591A JP3099416B2 (en) 1991-05-29 1991-05-29 Method for producing an asymmetric pore size polytetrafluoroethylene membrane

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP12594591A JP3099416B2 (en) 1991-05-29 1991-05-29 Method for producing an asymmetric pore size polytetrafluoroethylene membrane
US07889187 US5217666A (en) 1991-05-29 1992-05-28 Process for producing porous polytetrafluoroethylene film
DE1992616914 DE69216914T2 (en) 1991-05-29 1992-05-29 A process for producing a porous Polytetrafluoroethylenfolie
EP19920109053 EP0516121B1 (en) 1991-05-29 1992-05-29 Process for producing porous polytetrafluoroethylene film
DE1992616914 DE69216914D1 (en) 1991-05-29 1992-05-29 A process for producing a porous Polytetrafluoroethylenfolie

Publications (2)

Publication Number Publication Date
JPH04351645A true true JPH04351645A (en) 1992-12-07
JP3099416B2 JP3099416B2 (en) 2000-10-16

Family

ID=14922864

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12594591A Expired - Fee Related JP3099416B2 (en) 1991-05-29 1991-05-29 Method for producing an asymmetric pore size polytetrafluoroethylene membrane

Country Status (1)

Country Link
JP (1) JP3099416B2 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007510801A (en) * 2003-11-04 2007-04-26 ポーレックス コーポレイション How to use and their making composite porous material as well as their
WO2007135994A1 (en) 2006-05-19 2007-11-29 Fujifilm Corporation Crystalline polymer microporous membrane, method for producing the same, and filter for filtration
US7378020B2 (en) 2002-08-14 2008-05-27 Pall Corporation Fluoropolymer membrane
JP2008290069A (en) * 2007-04-25 2008-12-04 Fujifilm Corp Crystalline polymer microporous membrane, method for manufacturing the same, and filter for filtration
US7470488B2 (en) 2000-08-12 2008-12-30 Lg Chemical Co., Ltd. Multi-component composite film method for preparing the same
EP2033704A2 (en) 2007-09-04 2009-03-11 Fujifilm Corporation Crystalline polymer microporous film, manufacturing method of the same, and filtration filter
EP2060317A1 (en) 2007-11-16 2009-05-20 Fujifilm Corporation Crystalline polymer microporous film, manufacturing method of the same, and filtration filter
JP2009119416A (en) * 2007-11-16 2009-06-04 Fujifilm Corp Microfiltration filter and manufacturing method thereof
JP2009119413A (en) * 2007-11-16 2009-06-04 Fujifilm Corp Crystalline polymer microporous film, method of manufacturing the same and filter for filtration
JP2009119415A (en) * 2007-11-16 2009-06-04 Fujifilm Corp Microfiltration filter and manufacturing method thereof
US8668093B2 (en) 2006-04-03 2014-03-11 Entegris, Inc. Atmospheric pressure microwave plasma treated porous membranes
JP2016120490A (en) * 2011-04-01 2016-07-07 イー・エム・デイー・ミリポア・コーポレイシヨン Nanofiber containing composite structure
US9623352B2 (en) 2010-08-10 2017-04-18 Emd Millipore Corporation Method for retrovirus removal
US9750829B2 (en) 2009-03-19 2017-09-05 Emd Millipore Corporation Removal of microorganisms from fluid samples using nanofiber filtration media

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8617645B2 (en) 2000-08-12 2013-12-31 Lg Chem. Ltd. Multi-component composite film method for preparing the same
US7709153B2 (en) 2000-08-12 2010-05-04 Lg Chemical Co., Ltd. Multi-component composite film method for preparing the same
US7470488B2 (en) 2000-08-12 2008-12-30 Lg Chemical Co., Ltd. Multi-component composite film method for preparing the same
US7378020B2 (en) 2002-08-14 2008-05-27 Pall Corporation Fluoropolymer membrane
JP2007510801A (en) * 2003-11-04 2007-04-26 ポーレックス コーポレイション How to use and their making composite porous material as well as their
US8349400B2 (en) 2003-11-04 2013-01-08 Porex Corporation Method of making a composite porous material
JP2011190465A (en) * 2003-11-04 2011-09-29 Porex Corp Composite porous material and methods of making and using the same
US8789708B2 (en) 2006-04-03 2014-07-29 Entegris, Inc. Atmospheric pressure microwave plasma treated porous membranes
US8668093B2 (en) 2006-04-03 2014-03-11 Entegris, Inc. Atmospheric pressure microwave plasma treated porous membranes
WO2007135994A1 (en) 2006-05-19 2007-11-29 Fujifilm Corporation Crystalline polymer microporous membrane, method for producing the same, and filter for filtration
JP2008290069A (en) * 2007-04-25 2008-12-04 Fujifilm Corp Crystalline polymer microporous membrane, method for manufacturing the same, and filter for filtration
EP2033704A2 (en) 2007-09-04 2009-03-11 Fujifilm Corporation Crystalline polymer microporous film, manufacturing method of the same, and filtration filter
US8011518B2 (en) 2007-09-04 2011-09-06 Fujifilm Corporation Crystalline polymer microporous film, manufacturing method of the same, and filtration filter
JP2009119415A (en) * 2007-11-16 2009-06-04 Fujifilm Corp Microfiltration filter and manufacturing method thereof
JP2009119413A (en) * 2007-11-16 2009-06-04 Fujifilm Corp Crystalline polymer microporous film, method of manufacturing the same and filter for filtration
JP2009119412A (en) * 2007-11-16 2009-06-04 Fujifilm Corp Crystalline polymer microporous film, method of manufacturing the same and filter for filtration
JP2009119416A (en) * 2007-11-16 2009-06-04 Fujifilm Corp Microfiltration filter and manufacturing method thereof
EP2060317A1 (en) 2007-11-16 2009-05-20 Fujifilm Corporation Crystalline polymer microporous film, manufacturing method of the same, and filtration filter
US9750829B2 (en) 2009-03-19 2017-09-05 Emd Millipore Corporation Removal of microorganisms from fluid samples using nanofiber filtration media
US9623352B2 (en) 2010-08-10 2017-04-18 Emd Millipore Corporation Method for retrovirus removal
JP2016120490A (en) * 2011-04-01 2016-07-07 イー・エム・デイー・ミリポア・コーポレイシヨン Nanofiber containing composite structure

Also Published As

Publication number Publication date Type
JP3099416B2 (en) 2000-10-16 grant

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