CA2027687A1 - Filtration media and method of manufacture - Google Patents

Filtration media and method of manufacture

Info

Publication number
CA2027687A1
CA2027687A1 CA002027687A CA2027687A CA2027687A1 CA 2027687 A1 CA2027687 A1 CA 2027687A1 CA 002027687 A CA002027687 A CA 002027687A CA 2027687 A CA2027687 A CA 2027687A CA 2027687 A1 CA2027687 A1 CA 2027687A1
Authority
CA
Canada
Prior art keywords
filtration material
fibers
pressure drop
particle removal
planar
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
CA002027687A
Other languages
French (fr)
Other versions
CA2027687C (en
Inventor
Douglas C. Sundet
Albert H. Fox
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of CA2027687A1 publication Critical patent/CA2027687A1/en
Application granted granted Critical
Publication of CA2027687C publication Critical patent/CA2027687C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/08—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of fibres or yarns
    • 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
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2003—Glass or glassy material
    • B01D39/2017—Glass or glassy material the material being filamentary or fibrous
    • 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
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
    • 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
    • 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
    • D04H1/56—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 in association with fibre formation, e.g. immediately following extrusion of staple fibres
    • 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/12—Glass fibres
    • 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
    • B01D2239/10—Filtering material manufacturing
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/903—Microfiber, less than 100 micron diameter
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/39—Electrets separator
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24612—Composite web or sheet
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24628—Nonplanar uniform thickness material
    • Y10T428/24669—Aligned or parallel nonplanarities
    • Y10T428/24686—Pleats or otherwise parallel adjacent folds
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2904—Staple length fiber
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
    • Y10T442/619—Including other strand or fiber material in the same layer not specified as having microdimensions

Abstract

The present invention relates to filtration material, more particularly, filtration material that is suitable for air filtration in heating, ventilating, and air conditioning systems. The primary objective of a high performance air filter is to provide maximum particle removal while maintaining an acceptable pressure drop. Conventional fibrous filters obtain improved particle removal efficiency by using filaments having small diameter, which can be packed closely together. This close packing results in smaller voids between the fibers, which increases the probability that particles will be intercepted by a fiber. This increase in particle removal is, however, accompanied by an increase in pressure drop.
Excessive pressure drops can restrict air flow and shorten filter life. This invention provides filtration material comprising a web comprising continuous, meltblown fibers and staple, electrically charged fibers randomly dispersed among the continuous fibers. The filtration material can be formed in planar configurations and in configurations other than planar. Non-planar configurations can extend the useful working area for a given filter element's cross-section without requiring an additional corrugating or pleating process step. The filtration material exhibits high strength and low pressure drop.
CA 2027687 1989-11-14 1990-10-15 Filtration media and method of manufacture Expired - Fee Related CA2027687C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US43623689A 1989-11-14 1989-11-14
US436,236 1989-11-14

Publications (2)

Publication Number Publication Date
CA2027687A1 true CA2027687A1 (en) 1991-05-15
CA2027687C CA2027687C (en) 2002-12-31

Family

ID=23731655

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2027687 Expired - Fee Related CA2027687C (en) 1989-11-14 1990-10-15 Filtration media and method of manufacture

Country Status (10)

Country Link
US (1) US5350620A (en)
EP (1) EP0428400B1 (en)
JP (1) JPH03185169A (en)
KR (1) KR0162896B1 (en)
AU (1) AU634595B2 (en)
BR (1) BR9005749A (en)
CA (1) CA2027687C (en)
DE (1) DE69020501T2 (en)
ES (1) ES2073540T3 (en)
HK (1) HK1009316A1 (en)

Families Citing this family (90)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5273565A (en) * 1992-10-14 1993-12-28 Exxon Chemical Patents Inc. Meltblown fabric
DE4241514C2 (en) * 1992-12-10 1995-09-07 Freudenberg Carl Fa Method for producing a sheet loaded with dipoles and device for carrying out the method
KR100336012B1 (en) * 1993-08-17 2002-10-11 미네소타 마이닝 앤드 매뉴팩춰링 캄파니 How to charge the electret filter media
DE9314925U1 (en) * 1993-10-01 1993-12-09 Wildfang Dieter Gmbh Filter screen for water outlet fittings
KR950010936A (en) * 1993-10-20 1995-05-15 시바타 미노루 Electret filter
CA2124237C (en) 1994-02-18 2004-11-02 Bernard Cohen Improved nonwoven barrier and method of making the same
CA2136576C (en) 1994-06-27 2005-03-08 Bernard Cohen Improved nonwoven barrier and method of making the same
WO1996017569A2 (en) 1994-12-08 1996-06-13 Kimberly-Clark Worldwide, Inc. Method of forming a particle size gradient in an absorbent article
GB9425655D0 (en) * 1994-12-20 1995-02-22 British United Shoe Machinery Filter
CA2153278A1 (en) 1994-12-30 1996-07-01 Bernard Cohen Nonwoven laminate barrier material
US5593479A (en) * 1995-02-02 1997-01-14 Hmi Industries, Inc. Filter system
US6090469A (en) * 1995-04-21 2000-07-18 The University Of Tennessee Research Corporation Mechanically interlocked and thermally fused staple fiber pleated and non-pleated webs
WO1996037276A1 (en) 1995-05-25 1996-11-28 Kimberly-Clark Worldwide, Inc. Filter matrix
ZA965786B (en) 1995-07-19 1997-01-27 Kimberly Clark Co Nonwoven barrier and method of making the same
US5709735A (en) * 1995-10-20 1998-01-20 Kimberly-Clark Worldwide, Inc. High stiffness nonwoven filter medium
US5834384A (en) 1995-11-28 1998-11-10 Kimberly-Clark Worldwide, Inc. Nonwoven webs with one or more surface treatments
US6162535A (en) 1996-05-24 2000-12-19 Kimberly-Clark Worldwide, Inc. Ferroelectric fibers and applications therefor
US5772713A (en) * 1996-05-30 1998-06-30 Salinas; Irma C. Adjustable filter assembly
US5989303A (en) * 1996-08-19 1999-11-23 Hodge; Joseph Fan-fold filter for a forced air ventilation system
CA2283259A1 (en) * 1997-03-11 1998-09-17 The University Of Tennessee Research Corporation Meltblown composites and uses thereof
WO1998050616A1 (en) * 1997-05-08 1998-11-12 Minnesota Mining & Mfg Sorbent, pillowed nonwoven webs
US6176239B1 (en) * 1997-08-06 2001-01-23 The United States Of America As Represented By The Secretary Of The Army Advanced chemical-biological mask
US6537932B1 (en) 1997-10-31 2003-03-25 Kimberly-Clark Worldwide, Inc. Sterilization wrap, applications therefor, and method of sterilizing
US6090184A (en) * 1998-02-27 2000-07-18 Hmi Industries, Inc. Filter system
US6365088B1 (en) 1998-06-26 2002-04-02 Kimberly-Clark Worldwide, Inc. Electret treatment of high loft and low density nonwoven webs
US6759356B1 (en) 1998-06-30 2004-07-06 Kimberly-Clark Worldwide, Inc. Fibrous electret polymeric articles
US6110260A (en) * 1998-07-14 2000-08-29 3M Innovative Properties Company Filter having a change indicator
US6103643A (en) * 1998-07-15 2000-08-15 E. I. Du Pont De Nemours And Company High performance fabrics for cartridge filters
US6036752A (en) * 1998-07-28 2000-03-14 3M Innovative Properties Company Pleated filter
EP1157152A1 (en) * 1998-11-17 2001-11-28 Eldim, Inc. Method and apparatus for manufacturing non-woven articles
US6146580A (en) * 1998-11-17 2000-11-14 Eldim, Inc. Method and apparatus for manufacturing non-woven articles
US6573205B1 (en) * 1999-01-30 2003-06-03 Kimberly-Clark Worldwide, Inc. Stable electret polymeric articles
DE19920983C5 (en) * 1999-05-06 2004-11-18 Fibermark Gessner Gmbh & Co. Ohg Two-layer or multi-layer filter medium for air filtration and filter element made from it
US7128835B1 (en) 1999-11-23 2006-10-31 Pall Corporation Fluid treatment packs, fluid treatment elements, and methods for treating fluids
US20020070471A1 (en) * 1999-12-10 2002-06-13 George Lee Method and apparatus for controlling flow in a drum
JP4746247B2 (en) * 2000-04-18 2011-08-10 エイヴォン プロテクション システムズ，インク． Self-sealing filter connection and gas mask and filter assembly incorporating it
US6763830B1 (en) 2000-04-18 2004-07-20 Avon Rubber & Plastics, Inc. Respirator with hinged visor
US6616722B1 (en) 2000-05-09 2003-09-09 Hmi Industries, Inc. Room air cleaner
US6815383B1 (en) 2000-05-24 2004-11-09 Kimberly-Clark Worldwide, Inc. Filtration medium with enhanced particle holding characteristics
AU2002233940A1 (en) 2000-11-27 2002-06-03 Kimberly-Clark Worldwide, Inc. Face mask filtration media with improved breathability
US6511531B1 (en) 2001-01-26 2003-01-28 Hmi Industries, Inc. Room air filtering and freshening device
US6464745B2 (en) 2001-01-26 2002-10-15 Freudenberg Nonwovens Limited Partnership Minipleat synthetic air filter assembly
DE10111892C1 (en) * 2001-03-13 2002-08-22 Gkn Sinter Metals Gmbh Sintered, highly porous body
JP2002339221A (en) * 2001-03-13 2002-11-27 Toyoda Spinning & Weaving Co Ltd 3-d nonwoven fabric and method for producing the same
US6488744B2 (en) 2001-03-19 2002-12-03 Hmi Industries, Inc. Filter system
US7208026B2 (en) * 2001-08-09 2007-04-24 Dainippon Ink And Chemicals, Inc. Heat-resistant filter
US20040161993A1 (en) * 2001-09-06 2004-08-19 Gary Tripp Inorganic fiber insulation made from glass fibers and polymer bonding fibers
US7815967B2 (en) * 2001-09-06 2010-10-19 Alain Yang Continuous process for duct liner production with air laid process and on-line coating
US20050160711A1 (en) * 2004-01-28 2005-07-28 Alain Yang Air filtration media
US6656243B2 (en) 2002-02-06 2003-12-02 Joseph Hodge Filtered air vent
US7018438B2 (en) * 2002-03-29 2006-03-28 Hmi Industries, Inc. Filtering system
US6827764B2 (en) 2002-07-25 2004-12-07 3M Innovative Properties Company Molded filter element that contains thermally bonded staple fibers and electrically-charged microfibers
US6878193B2 (en) * 2003-01-13 2005-04-12 James W. Kasmark, Jr. Filter material and method of making same
US20040163372A1 (en) * 2003-02-25 2004-08-26 Nguyen Ledu Q. Environmentally friendly air filter for an internal combustion engine
US6932923B2 (en) * 2003-03-03 2005-08-23 Arvin Technologies, Inc. Method of making a melt-blown filter medium for use in air filters in internal combustion engines and product
US20040178135A1 (en) * 2003-03-13 2004-09-16 Beplate Douglas K. Filtering device incorporating nanoparticles
DE10332439B3 (en) * 2003-07-16 2004-12-30 Sandler Ag Two-layer synthetic filter element
US20050026526A1 (en) * 2003-07-30 2005-02-03 Verdegan Barry M. High performance filter media with internal nanofiber structure and manufacturing methodology
EP1761350A2 (en) * 2004-06-29 2007-03-14 NV Bekaert SA Metal fiber web with filamentary reinforcements at outer surfaces
US20060057351A1 (en) * 2004-09-10 2006-03-16 Alain Yang Method for curing a binder on insulation fibers
US20070068391A1 (en) * 2004-12-01 2007-03-29 Stanley Wiener Biological home defense system
RU2281144C1 (en) * 2005-01-11 2006-08-10 ЗАО "Кондор-Эко" Filter
US7682927B2 (en) * 2005-03-25 2010-03-23 Kabushiki Kaisha Toshiba Method of manufacturing semiconductor device
US7828869B1 (en) 2005-09-20 2010-11-09 Cummins Filtration Ip, Inc. Space-effective filter element
US7674425B2 (en) 2005-11-14 2010-03-09 Fleetguard, Inc. Variable coalescer
US8114183B2 (en) 2005-09-20 2012-02-14 Cummins Filtration Ip Inc. Space optimized coalescer
US20070062886A1 (en) 2005-09-20 2007-03-22 Rego Eric J Reduced pressure drop coalescer
US7959714B2 (en) 2007-11-15 2011-06-14 Cummins Filtration Ip, Inc. Authorized filter servicing and replacement
US8231752B2 (en) 2005-11-14 2012-07-31 Cummins Filtration Ip Inc. Method and apparatus for making filter element, including multi-characteristic filter element
US7990650B2 (en) * 2006-07-14 2011-08-02 Hitachi Global Storage Technologies, Netherlands B.V. Reducing the obstruction of air flow through a bypass channel associated with a disk drive using an electrostatic pass-by filter
US20080013206A1 (en) * 2006-07-14 2008-01-17 Feliss Norbert A Reducing the obstruction of air flow through a bypass channel associated with a disk drive
US8257459B2 (en) 2007-02-28 2012-09-04 Hollingsworth & Vose Company Waved filter media and elements
EP2620205B1 (en) * 2007-02-28 2018-11-07 Hollingsworth & Vose Company Waved filter media
US8202340B2 (en) * 2007-02-28 2012-06-19 Hollingsworth & Vose Company Waved filter media and elements
US7989371B2 (en) * 2007-06-22 2011-08-02 3M Innovative Properties Company Meltblown fiber web with staple fibers
US7989372B2 (en) * 2007-06-22 2011-08-02 3M Innovative Properties Company Molded respirator comprising meltblown fiber web with staple fibers
DE102008047552A1 (en) * 2008-09-16 2010-04-08 Carl Freudenberg Kg Electret filter element and method for its production
DE102008050264A1 (en) * 2008-10-07 2010-04-08 Carl Freudenberg Kg Filter element for filtering fine dust, has electrically charged pile fibers and filament with middle diameter of ten micrometers, where mixture of pile fibers is made of polyolefin and pile fibers are made of polyacrylonitrile
EP2283901B1 (en) * 2009-08-14 2013-01-02 Moldex-Metric AG & Co. KG Filter material and respirator mask
CN103025941B (en) 2010-07-07 2016-08-10 3M创新有限公司 The gas of patterning spins non-woven webs and preparation and application thereof
US20130108831A1 (en) * 2010-07-07 2013-05-02 3M Innovative Properties Company Patterned air-laid nonwoven electret fibrous webs and methods of making and using same
US10441909B2 (en) 2014-06-25 2019-10-15 Hollingsworth & Vose Company Filter media including oriented fibers
US10507566B2 (en) * 2015-03-18 2019-12-17 The Clorox Company Process for manufacturing scrubby substrates and substrates made therefrom
TWM518119U (en) 2015-08-06 2016-03-01 K J Filtration Technologies Ltd Self-supporting electrostatic filter material and its filter
US10449474B2 (en) 2015-09-18 2019-10-22 Hollingsworth & Vose Company Filter media including a waved filtration layer
US10561972B2 (en) 2015-09-18 2020-02-18 Hollingsworth & Vose Company Filter media including a waved filtration layer
CA2928138A1 (en) * 2015-11-10 2017-05-10 3M Innovative Properties Company Air filter use indicators
US10252200B2 (en) * 2016-02-17 2019-04-09 Hollingsworth & Vose Company Filter media including a filtration layer comprising synthetic fibers
US11014030B2 (en) 2016-02-17 2021-05-25 Hollingsworth & Vose Company Filter media including flame retardant fibers
CN110354994A (en) * 2019-06-10 2019-10-22 袁野 One kind being applied to industrial flue gas cleaning equipment

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3016599A (en) * 1954-06-01 1962-01-16 Du Pont Microfiber and staple fiber batt
US3849241A (en) * 1968-12-23 1974-11-19 Exxon Research Engineering Co Non-woven mats by melt blowing
US3920428A (en) * 1974-03-25 1975-11-18 Ethyl Corp Filter element
US4103058A (en) * 1974-09-20 1978-07-25 Minnesota Mining And Manufacturing Company Pillowed web of blown microfibers
CA1073648A (en) * 1976-08-02 1980-03-18 Edward R. Hauser Web of blended microfibers and crimped bulking fibers
US4215682A (en) * 1978-02-06 1980-08-05 Minnesota Mining And Manufacturing Company Melt-blown fibrous electrets
US4286977A (en) * 1979-10-15 1981-09-01 Max Klein High efficiency particulate air filter
DE3065174D1 (en) * 1980-09-15 1983-11-10 Freudenberg Carl Fa Filtering material
JPS57105217A (en) * 1980-12-22 1982-06-30 Nitta Kk Fibrous filter medium
US4375718A (en) * 1981-03-12 1983-03-08 Surgikos, Inc. Method of making fibrous electrets
US4547420A (en) * 1983-10-11 1985-10-15 Minnesota Mining And Manufacturing Company Bicomponent fibers and webs made therefrom
US4729371A (en) * 1983-10-11 1988-03-08 Minnesota Mining And Manufacturing Company Respirator comprised of blown bicomponent fibers
AU569108B2 (en) * 1983-10-11 1988-01-21 Minnesota Mining And Manufacturing Company Web of bicomponent fibers
US4824451A (en) * 1985-12-31 1989-04-25 Kimberly-Clark Corporation Melt-blown filter medium
US4988560A (en) * 1987-12-21 1991-01-29 Minnesota Mining And Manufacturing Company Oriented melt-blown fibers, processes for making such fibers, and webs made from such fibers
JPH01168364A (en) * 1987-12-24 1989-07-03 Toray Ind Inc Filtration method
US4874399A (en) * 1988-01-25 1989-10-17 Minnesota Mining And Manufacturing Company Electret filter made of fibers containing polypropylene and poly(4-methyl-1-pentene)

Also Published As

Publication number Publication date
KR910009317A (en) 1991-06-28
ES2073540T3 (en) 1995-08-16
BR9005749A (en) 1991-09-24
AU6558690A (en) 1991-05-23
KR0162896B1 (en) 1998-12-01
DE69020501D1 (en) 1995-08-03
EP0428400B1 (en) 1995-06-28
US5350620A (en) 1994-09-27
AU634595B2 (en) 1993-02-25
CA2027687C (en) 2002-12-31
DE69020501T2 (en) 1996-02-29
HK1009316A1 (en) 1999-05-28
EP0428400A1 (en) 1991-05-22
JPH03185169A (en) 1991-08-13

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