CN116926776B - 多孔ptfe膜 - Google Patents

多孔ptfe膜

Info

Publication number
CN116926776B
CN116926776B CN202310684722.2A CN202310684722A CN116926776B CN 116926776 B CN116926776 B CN 116926776B CN 202310684722 A CN202310684722 A CN 202310684722A CN 116926776 B CN116926776 B CN 116926776B
Authority
CN
China
Prior art keywords
membrane
tensile stress
machine direction
peak tensile
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.)
Active
Application number
CN202310684722.2A
Other languages
English (en)
Chinese (zh)
Other versions
CN116926776A (zh
Inventor
A·苏塔尔
R·布拉达曼特
R·J·小潘尼佩克
S·S·拉贾瑞亚
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.)
Donaldson Co Inc
Original Assignee
Donaldson Co Inc
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 Donaldson Co Inc filed Critical Donaldson Co Inc
Publication of CN116926776A publication Critical patent/CN116926776A/zh
Application granted granted Critical
Publication of CN116926776B publication Critical patent/CN116926776B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1692—Other shaped material, e.g. perforated or porous sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/30—Polyalkenyl halides
    • B01D71/32—Polyalkenyl halides containing fluorine atoms
    • B01D71/36—Polytetrafluoroethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
    • B29C55/065—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed in several stretching steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • B29C55/08—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique transverse to the direction of feed
    • B29C55/085—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique transverse to the direction of feed in several stretching steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
    • B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
    • B29C55/14—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • D04H1/4318—Fluorine series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/023—Porous and characterised by the material
    • H01M8/0239—Organic resins; Organic polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
    • B01D2239/025—Types of fibres, filaments or particles, self-supporting or supported materials comprising nanofibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0618—Non-woven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1216—Pore size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1233—Fibre diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1291—Other parameters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2325/00—Details relating to properties of membranes
    • B01D2325/02—Details relating to pores or porosity of the membranes
    • B01D2325/0281—Fibril, or microfibril structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2325/00—Details relating to properties of membranes
    • B01D2325/02—Details relating to pores or porosity of the membranes
    • B01D2325/0283—Pore size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2325/00—Details relating to properties of membranes
    • B01D2325/04—Characteristic thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2325/00—Details relating to properties of membranes
    • B01D2325/20—Specific permeability or cut-off range
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2325/00—Details relating to properties of membranes
    • B01D2325/24—Mechanical properties, e.g. strength
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Sustainable Development (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Energy (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Fuel Cell (AREA)
  • Nonwoven Fabrics (AREA)
CN202310684722.2A 2018-12-17 2019-12-16 多孔ptfe膜 Active CN116926776B (zh)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201862780776P 2018-12-17 2018-12-17
US62/780,776 2018-12-17
PCT/US2019/066646 WO2020131752A1 (en) 2018-12-17 2019-12-16 Porous ptfe membrane
CN201980081952.1A CN113396007B (zh) 2018-12-17 2019-12-16 多孔ptfe膜

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN201980081952.1A Division CN113396007B (zh) 2018-12-17 2019-12-16 多孔ptfe膜

Publications (2)

Publication Number Publication Date
CN116926776A CN116926776A (zh) 2023-10-24
CN116926776B true CN116926776B (zh) 2026-03-27

Family

ID=69182615

Family Applications (2)

Application Number Title Priority Date Filing Date
CN202310684722.2A Active CN116926776B (zh) 2018-12-17 2019-12-16 多孔ptfe膜
CN201980081952.1A Active CN113396007B (zh) 2018-12-17 2019-12-16 多孔ptfe膜

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN201980081952.1A Active CN113396007B (zh) 2018-12-17 2019-12-16 多孔ptfe膜

Country Status (7)

Country Link
US (2) US12318722B2 (https=)
EP (1) EP3897914A1 (https=)
JP (2) JP2022511842A (https=)
KR (1) KR20210101305A (https=)
CN (2) CN116926776B (https=)
SG (1) SG11202105370XA (https=)
WO (1) WO2020131752A1 (https=)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116926776B (zh) 2018-12-17 2026-03-27 唐纳森公司 多孔ptfe膜
SE547778C2 (en) * 2021-11-24 2025-11-25 Nss Water Enhancement Tech Ab Membrane distiller and membrane distillation assembly comprising such membrane distiller
CN117861465B (zh) * 2022-12-19 2025-03-07 飞潮(上海)新材料股份有限公司 一种具有梯度孔结构的聚四氟乙烯膜及其制备方法
WO2024249562A2 (en) * 2023-05-30 2024-12-05 Rensselaer Polytechnic Institute Systems and methods including fused particle membranes for filtration

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105829415A (zh) * 2013-11-29 2016-08-03 大金工业株式会社 多孔质体、高分子电解质膜、过滤器用滤材和过滤器单元

Family Cites Families (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3315020A (en) 1962-03-21 1967-04-18 Gore & Ass Process for preparing biaxially fibrillated sheets
CA962021A (en) 1970-05-21 1975-02-04 Robert W. Gore Porous products and process therefor
US5234751A (en) * 1989-09-12 1993-08-10 Sumitomo Electric Industries, Ltd. Porous material of polytetrafluoroethylene and process for producing the same
JP2533229B2 (ja) 1989-09-12 1996-09-11 住友電気工業株式会社 ポリテトラフルオロエチレン多孔質体とその製造方法
WO1992021715A1 (en) * 1991-06-04 1992-12-10 Donaldson Company, Inc. Fluid treated polytetrafluoroethylene products and their manufacture
CA2074349C (en) 1991-07-23 2004-04-20 Shinji Tamaru Polytetrafluoroethylene porous film and preparation and use thereof
JP3003500B2 (ja) * 1994-04-28 2000-01-31 ダイキン工業株式会社 ポリテトラフルオロエチレン複合多孔膜
US5599614A (en) 1995-03-15 1997-02-04 W. L. Gore & Associates, Inc. Integral composite membrane
US5547551A (en) 1995-03-15 1996-08-20 W. L. Gore & Associates, Inc. Ultra-thin integral composite membrane
US5804286A (en) * 1995-11-22 1998-09-08 Fiberweb North America, Inc. Extensible composite nonwoven fabrics
US5476589A (en) * 1995-03-10 1995-12-19 W. L. Gore & Associates, Inc. Porpous PTFE film and a manufacturing method therefor
US5814405A (en) 1995-08-04 1998-09-29 W. L. Gore & Associates, Inc. Strong, air permeable membranes of polytetrafluoroethylene
US5838406A (en) 1995-08-29 1998-11-17 W. L. Gore & Associates, Inc. Light reflectant surface of expanded polytetrafluoroethylene with nodes and fibrils for backlit liquid crystal displays
US6110333A (en) 1997-05-02 2000-08-29 E. I. Du Pont De Nemours And Company Composite membrane with highly crystalline porous support
US6517919B1 (en) * 1998-07-10 2003-02-11 Donaldson Company, Inc. Laminate and pulse jet filter bag
US6613203B1 (en) 2001-09-10 2003-09-02 Gore Enterprise Holdings Ion conducting membrane having high hardness and dimensional stability
JP3672868B2 (ja) * 2001-12-26 2005-07-20 日東電工株式会社 ポリテトラフルオロエチレン多孔質膜複合材の製造方法
US6737158B1 (en) * 2002-10-30 2004-05-18 Gore Enterprise Holdings, Inc. Porous polymeric membrane toughened composites
US8895139B2 (en) * 2003-03-27 2014-11-25 Robert Roberts Isotropic nano crystallites of polytetrafluoroethylene (PTFE) resin and products thereof that are biaxially planar oriented and form stable
US20050095943A1 (en) * 2003-10-30 2005-05-05 Kimberly-Clark Worldwide, Inc. Cross machine direction extensible nonwoven webs
JP2005314593A (ja) * 2004-04-30 2005-11-10 Sumitomo Electric Ind Ltd 二軸延伸ポリテトラフルオロエチレン多孔質膜とその製造方法
DE602004009463T2 (de) 2004-12-23 2008-07-24 W. L. Gore & Associates Gmbh Luftfilter für Turbineneinlass
JP4683957B2 (ja) * 2005-02-25 2011-05-18 花王株式会社 不織布
US7306729B2 (en) * 2005-07-18 2007-12-11 Gore Enterprise Holdings, Inc. Porous PTFE materials and articles produced therefrom
US8652705B2 (en) * 2005-09-26 2014-02-18 W.L. Gore & Associates, Inc. Solid polymer electrolyte and process for making same
US7754041B2 (en) * 2006-07-31 2010-07-13 3M Innovative Properties Company Pleated filter with bimodal monolayer monocomponent media
JP5207694B2 (ja) 2007-09-20 2013-06-12 日本ゴア株式会社 延伸多孔質ポリテトラフルオロエチレンフィルム積層ガスケットシート及びこのガスケットシートから構成されるガスケット
US7942275B2 (en) * 2008-07-08 2011-05-17 Bha Group, Inc. Expanded PFTE membrane and method of making
US8267681B2 (en) * 2009-01-28 2012-09-18 Donaldson Company, Inc. Method and apparatus for forming a fibrous media
CN102333913B (zh) * 2009-02-26 2014-10-29 旭硝子株式会社 无纺布及电解质膜
US9944044B2 (en) * 2010-05-06 2018-04-17 W. L. Gore & Associates, Inc. Contamination resistant air permeable fabric laminate and garments made therefrom
US11180876B2 (en) * 2011-03-18 2021-11-23 Donaldson Company, Inc. High temperature treated media
JP5204266B2 (ja) * 2011-04-25 2013-06-05 日東電工株式会社 ポリテトラフルオロエチレン多孔質膜の製造方法およびバグフィルタ用濾材の製造方法
KR20160029821A (ko) * 2013-07-05 2016-03-15 더 노스 훼이스 어패럴 코오포레이션 섬유 및 필라멘트의 힘방사
KR102112645B1 (ko) * 2013-11-29 2020-05-19 아사히 가세이 가부시키가이샤 고분자 전해질막
JP6338054B2 (ja) 2014-05-30 2018-06-06 住友電工ファインポリマー株式会社 多孔質フィルタの製造方法
JP6492441B2 (ja) * 2014-07-25 2019-04-03 東レ株式会社 不織布の製造方法
CN116926776B (zh) 2018-12-17 2026-03-27 唐纳森公司 多孔ptfe膜

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105829415A (zh) * 2013-11-29 2016-08-03 大金工业株式会社 多孔质体、高分子电解质膜、过滤器用滤材和过滤器单元

Also Published As

Publication number Publication date
WO2020131752A1 (en) 2020-06-25
JP2022511842A (ja) 2022-02-01
CN113396007B (zh) 2023-06-30
JP2025004137A (ja) 2025-01-14
US12318722B2 (en) 2025-06-03
CN116926776A (zh) 2023-10-24
EP3897914A1 (en) 2021-10-27
CN113396007A (zh) 2021-09-14
US20250303330A1 (en) 2025-10-02
US20220062806A1 (en) 2022-03-03
SG11202105370XA (en) 2021-07-29
KR20210101305A (ko) 2021-08-18

Similar Documents

Publication Publication Date Title
CN116926776B (zh) 多孔ptfe膜
KR101353726B1 (ko) 폴리테트라플루오로에틸렌 다공질막의 제조 방법과 필터 여과재 및 필터 유닛
JP3672927B2 (ja) 多孔質ｐｔｆｅフィルムとその製造方法
TWI526243B (zh) Porous multi - layer filter
US11547973B2 (en) Asymmetric polytetrafluoroethylene composite having a macro-textured surface and method for making the same
US20110052900A1 (en) Porous multilayer filter and method for producing same
JP2010018800A (ja) 延伸ｐｔｆｅ膜及び製造方法
JP2015226877A (ja) 多孔質フィルタ
JP2013067076A (ja) ポリテトラフルオロエチレン多孔質膜の製造方法
JP5154784B2 (ja) フィルター
US20250135406A1 (en) Porous membrane laminate
US20250108340A1 (en) Porous membrane, porous membrane laminate, and method of manufacturing porous membrane
KR20240136350A (ko) 다공질막 및 다공질막 적층체
JP7816841B2 (ja) グラジエント孔構造を有するポリテトラフルオロエチレン膜及びその製造方法
WO2019107746A1 (ko) 불소계 수지 다공성 막의 제조방법

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant