+

WO1996013320A1 - Materiau polymere composite et electroconducteur - Google Patents

Materiau polymere composite et electroconducteur Download PDF

Info

Publication number
WO1996013320A1
WO1996013320A1 PCT/GB1995/002521 GB9502521W WO9613320A1 WO 1996013320 A1 WO1996013320 A1 WO 1996013320A1 GB 9502521 W GB9502521 W GB 9502521W WO 9613320 A1 WO9613320 A1 WO 9613320A1
Authority
WO
WIPO (PCT)
Prior art keywords
accordance
electrically conductive
composite material
polymeric material
section
Prior art date
Application number
PCT/GB1995/002521
Other languages
English (en)
Other versions
WO1996013320B1 (fr
Inventor
Christopher John Mould
Original Assignee
Btr Plc
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
Priority claimed from GB9421691A external-priority patent/GB9421691D0/en
Application filed by Btr Plc filed Critical Btr Plc
Publication of WO1996013320A1 publication Critical patent/WO1996013320A1/fr
Publication of WO1996013320B1 publication Critical patent/WO1996013320B1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2411—Filter cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/4209—Prevention of static charge, e.g. by grounding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • 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
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/72—Encapsulating inserts having non-encapsulated projections, e.g. extremities or terminal portions of electrical components
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/88—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
    • B29C70/882—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced partly or totally electrically conductive, e.g. for EMI shielding
    • B29C70/885—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced partly or totally electrically conductive, e.g. for EMI shielding with incorporated metallic wires, nets, films or plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/50—Means for dissipating electrostatic charges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
    • B29K2995/0005—Conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/14—Filters

Definitions

  • This invention relates generally to an electrically conductive composite polymeric material and to an article such as a filter element in which at least a part of the article is required to be electrically conductive to enable a build up of static electricity to be avoided.
  • the invention relates in particular though not exclusively to a material and an article comprising a material which also is compressible.
  • a filter element for removal of explosible particulate matter such as wood dust from a stream of air commonly comprises a filter medium of an envelope shape. Dust laden air is drawn inwards through the walls of the envelope. Filtered air flows out from the inside of the envelope through an opening in an integrally moulded compressible end section known as a header end.
  • the header end is sealed to a separator plate which divides a filter housing into a filtered side and an unfiltered side.
  • the separator plate has an opening for each filter element header end to allow filtered air to flow from inside each filter element to the clean side of the separator plate.
  • header end is moulded from non-conductive material a special earthing connection needs to be made between the filter coating and frame structure of the filter housing.
  • a disadvantage of this is that when replacing a filter element it is necessary to re-establish the earth connection. This involves additional maintenance time. Also there is the risk that an operator will fail to make a good connection or check that a good connection has been made.
  • the present invention seeks to provide an improved article such as a filter element in which the foregoing disadvantages are addressed. It seeks also to provide an improved electrically conductive composite polymeric material, e g a material of a compressible type and method for the manufacture said article or composite material.
  • the present invention provides an electrically conductive composite polymeric material comprising a body of polymeric material which has moulded therein an array of interconnected filamentary type electrically conductive elements which are in electrically conductive association with one another, the filamentary type elements having free ends and at least some of said free ends lying exposed at a surface region of the polymeric material.
  • the present invention provides a method for the manufacture of an electrically conductive composite polymeric material comprising providing a mould, positioning in the mould an array of interconnected filamentary type electrically conductive elements, adding liquid polymeric material to the mould to surround and embed the conductive material and allowing the liquid polymeric material to solidify.
  • the polymeric material may be a compressible type material such as one having a hardness which is in the range 60 to 70 Shore A, preferably in the order of 65 Shore A.
  • An example of a compressible type polymeric material for use in the present invention is polyurethane.
  • Use may be made preferably of a polyurethane which during moulding has a viscosity in the range 3,000 to 4,000 mPas at 25 ° C.
  • the polymeric material may be substantially incompressible.
  • An example of such a material for use in the present invention is epoxy resin.
  • the polymeric material may be shaped for example by moulding or by cutting.
  • the body of polymeric material may comprise a first region of substantially incompressible polymeric material and a second region of a polymeric material of a compressible type.
  • the filamentary type electrically conductive elements may be provided in only one of said regions or may lie in both of said regions.
  • the body of polymeric material may comprise, at least in part, a section of elongate form. That section preferably has a cross-sectional shape for which the aspect ratio, being the maximum ratio of the dimensions of the cross-section in any two mutually perpendicular directions, is less than 5:1 , more preferably less than 3:1.
  • the method preferably comprises positioning in at least a section of the mould an array of interconnected filamentary type electrically conductive elements which is over size such that end regions of at least some of the filaments inherently tend respectively to bear resiliently against confronting surface areas of the mould.
  • the array of interconnected filamentary type elements may be in the form of a three dimensional mesh at outer surface regions of which the elements have free ends.
  • the array of filamentary type elements comprises at least one electrically conductive core strand from which a plurality of filaments extend radially outwardly in a configuration such as that of tinsel.
  • the electrically conductive elements extend substantially wholly through a cross-section of the body of polymeric material, or a region thereof in the case of a body comprising two or more regions of different polymeric materials.
  • the conductive elements are not confined to just a surface region or coating layer, and are not excluded from any specific zone of the body or region. They may lie randomly or be distributed in a substantially uniform manner. 4
  • Two or more lengths of tinsel or other arrays of interconnected filamentary type elements may be provided, e.g. to extend substantially side-by-side in which instance preferably those lengths are electrically interconnected.
  • Suitable electrically conductive materials for the filamentary type elements are metallic materials such as copper, aluminium and stainless steel, and non-metallic materials such as carbon fibre.
  • Filaments such as those of tinsel typically may have a length in the order of 10 to 80 mm, a thickness in the order of 0.01 to 0.05 mm and, if of rectangular section, a width between 0.01 and 0.5 mm.
  • a preferred tinsel filament may have a length in the order of 15 mm and a section of 0.02 mm thick and width between 0.25 and 0.5 mm.
  • the present invention provides also an article such as a filter element comprising at least in part a body of said composite polymeric material or a composite polymeric material made by said method. That material may be moulded and it may be moulded to form a structural interconnection, preferably a substantially fluid- or air-tight interconnection, with another part of the article. Said another part of the article may be at least in part electrically conductive and arranged in electrical contact with the elements of the body of polymeric material.
  • Said article may be a filter element comprising a first section of a filter medium which is, or has a surface coating of, electrically conducting material and a second section which comprises an electrically conductive composite polymeric material of the invention and arranged in electrically conductive contact with the filter medium or surface coating thereof.
  • the second section may be a header end section and preferably is compressible so as to be suitable for forming a substantially fluid-tight seal with the frame structure of a filter housing.
  • Preferably ends of the filamentary type elements are exposed at that surface region of the polymeric material which forms a fluid tight seal. The ends are then able to form an electrical connection with an earthed metal part of the filter housing.
  • Said second section may be another part, e g a closed tail end section, of the filter element. In that case it may be substantially incompressible. It may be clamped to an electrically conductive structure which is earthed for example via the frame of a filter housing.
  • Figures 1 and 2 are edge and side face views respectively of a filter element of the invention
  • Figure 3 is a perspective view of the filter element of Figures 1 and 2;
  • Figure 4 is a side view of a multi-ended metallic insert
  • FIG. 5 shows in detail an end section of the filter element of Figures 1 to 3;
  • Figure 6 is a top view of another filter element of the invention.
  • Figure 7 is a side view of part of the element of Figure 6;
  • Figure 8 is a detail of part of the element of figures 6 and 7, and
  • Figure 9 is a part section on the line 9-9 of Figure 6
  • a flat type filter element 10 for the filtration of dust laden air comprises two superimposed layers 11 ,12 of pleated filter material.
  • Each layer 11 ,12 has on its outer surface a carbon loaded surface coating to render it electrically conductive.
  • the ends of the corrugated layers are embedded in a moulded header end section 13 and a moulded tail end section 1 .
  • the header end section 13 is of a moulded compressible type polymeric material (in this case a polyurethane resin) adapted for forming a substantially fluid tight seal against a separator plate (not illustrated) which separates contaminated and filtered zones of a filter housing.
  • the header section defines an opening 15 through which filtered air can flow from the space between the pleated layers 11 ,12 through an opening in the separator plate and into the filtered zone of the housing.
  • the tail end section 14 is also of a moulded polymeric material (in this case of the same material as the header end section, i e polyurethane), but is not compressible. In this case it is substantially incompressible.
  • the header and tail sections each have moulded therein at least one length of copper tinsel 16 (illustrated in Figure 4). It is found that surprisingly the hair like elements 17 which radiate outwards from the core strand 18 (as shown in Figure 4) remain substantially in that orientation even when moulded into the body of polymeric material and are not forced to lie flat against the core strand.
  • the tinsel hair elements 17 and length of the core strand 18 are chosen so that in the moulded end sections 13, 14 each length of tinsel extends along the whole length of the end section and so that the hair like elements do not stop short of outer surface regions of the moulded material.
  • the end sections are formed by a moulding operation in which part of the mould shape is defined by the pleated filter medium. A moulded interconnection and bond between the end sections and filter medium results.
  • the tinsel elements are positioned in the mould in the narrow channel formed between apex, i e ridge zones of the filter pleats and confronting mould surfaces.
  • the free ends of the tinsel hair elements 17 are present at outwardly facing surfaces of the end sections and also those surfaces which form a moulded interface with the filter medium and the stiffness of the elements is sufficient to resist displacement when the mould space is filled with polyurethane.
  • the elements 17 therefore lie in electrical contact with the conductive carbon coatings on the corrugated layers 1 1 , 12.
  • the tail end section 14 may be clamped in electrical contact with said tray which is connected to earth.
  • Each end section 13,14 may have two or more sections of copper tinsel embedded therein.
  • one length of tinsel is folded back on itself to provide a U-shaped configuration of two sections 21 ,22 as shown by the dashed line of Figure 3 and arranged to lie alongside the respective corrugated layers 1 1 ,12.
  • the filter element 30 of a second embodiment of the invention as shown in Figures 6 to 9 comprises a header section 31 that incorporates lengths of copper tinsel 34 over only a central part 32 of the length of each of the longer side regions 33 of the header section.
  • the tinsel is folded back on itself such that two halves of the length of that tinsel lie side-by-side.
  • Each half length is of a size which in a free condition would more than wholly occupy the cross-section (see figure 9) of the header section.
  • tinsel fibre end regions 37 will bear resiliently against confronting mould cavity surfaces (one of which may be defined by the filter medium 36) that form the opposite sides 38,39 of the header sections as shown in Figure 9.
  • each half length is arranged to wholly occupy said header cross-section, by laying the tinsel in a doubled form there is achieved a higher degree of conductivity between surface regions.
  • the other end of the filter medium 36 is moulded into a stainless steel tray 40.
  • Three lengths 41 of tinsel extend transversely across the tray and are embedded in the moulded material (see figure 8), e.g. polyurethane, to provide electrical conductivity between the tray and filter medium.
  • the conductive material 34 is embedded in and extends randomly throughout a body of polymeric material in contrast to being merely a surface coating.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Geometry (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

Ce matériau polymère composite, électroconducteur, destiné à former au moins un élément de filtre (10), tel qu'une section (13) d'extrémité de support de filtre, comprend un corps (13, 14, 31) en matériau polymère dans lequel on a moulé une matrice (16) d'éléments (17, 18) électroconducteurs de type filament, reliés entre eux, associés les uns aux autres de manière électroconductrice et possédant des extrémités libres dont une partie au moins se trouve exposée au niveau d'une région superficielle du matériau polymère.
PCT/GB1995/002521 1994-10-27 1995-10-26 Materiau polymere composite et electroconducteur WO1996013320A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9421691.8 1994-10-27
GB9421691A GB9421691D0 (en) 1994-10-27 1994-10-27 Tapered plug valve
GB9423939A GB9423939D0 (en) 1994-10-27 1994-11-28 Electrically conductive composite polymeric material
GB9423939.9 1994-11-28

Publications (2)

Publication Number Publication Date
WO1996013320A1 true WO1996013320A1 (fr) 1996-05-09
WO1996013320B1 WO1996013320B1 (fr) 1996-06-20

Family

ID=26305879

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1995/002521 WO1996013320A1 (fr) 1994-10-27 1995-10-26 Materiau polymere composite et electroconducteur

Country Status (2)

Country Link
GB (1) GB2294468B (fr)
WO (1) WO1996013320A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19848774A1 (de) * 1998-10-22 2000-05-04 Herding Gmbh Filtereinheit zum auswechselbaren Einsetzen in das Gehäuse einer Filteranlage
EP1594590B1 (fr) * 2003-01-31 2008-04-02 Cft Gmbh Compact Filter Technic Filtre a poussiere destine a etre utilise dans des exploitations exposees au danger provoque par des gaz

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19715196C2 (de) * 1997-04-11 1999-04-22 Herding Gmbh Filterelement
GB0725015D0 (en) 2007-12-21 2008-01-30 Madison Filter 981 Ltd Filter element frames
AU2009207467B2 (en) 2008-01-21 2013-03-28 Madison Filter 981 Limited Improvements in belt seams
JP5300416B2 (ja) * 2008-10-31 2013-09-25 三洋電機株式会社 バッテリシステム
DE102012223927A1 (de) * 2012-12-20 2014-06-26 Mahle International Gmbh Filterelement

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2075771A5 (fr) * 1970-01-21 1971-10-08 Grace W R Ltd
FR2132440A1 (fr) * 1971-04-06 1972-11-17 Ici Ltd
FR2347854A1 (fr) * 1976-04-06 1977-11-04 Vibrachoc Sa Nappe de protection, notamment pour appareils electriques ou radioelectriques
US4128251A (en) * 1977-09-21 1978-12-05 Champion Laboratories, Inc. Sealing gasket for air filter
GB2134811A (en) * 1983-02-08 1984-08-22 Ross Bryan Barrington Filter unit
FR2591530A1 (fr) * 1985-12-17 1987-06-19 Stratinor Materiau composite stratifie, un procede pour sa preparation et son application au traitement des phenomenes electrostatiques ou electromagnetiques
DE3918342C1 (fr) * 1989-06-06 1990-06-07 Knecht Filterwerke Gmbh, 7000 Stuttgart, De
WO1991001621A2 (fr) * 1989-07-27 1991-02-21 Hyperion Catalysis International, Inc. Composites et procedes de fabrication
US5066318A (en) * 1990-04-13 1991-11-19 Pcf Group, Inc. Filter element gasket

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4882089A (en) * 1982-03-16 1989-11-21 American Cyanamid Company Compositions convertible to reinforced conductive components and articles incorporating same
CA2007161C (fr) * 1989-01-23 2001-09-18 David C. Koskenmaki Produit constitue d'un substrat polymerique renfermant des fibres metalliques
JPH02307551A (ja) * 1989-05-20 1990-12-20 Abisare:Kk 静電吸着シート
JPH03289004A (ja) * 1990-04-04 1991-12-19 Matsushita Electric Ind Co Ltd 導電性樹脂組成物
US5111178A (en) * 1990-06-15 1992-05-05 Bourns, Inc. Electrically conductive polymer thick film of improved wear characteristics and extended life
US5262229A (en) * 1991-11-04 1993-11-16 United Technical Products, Inc. Conductive releasable adhesive and method of making same

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2075771A5 (fr) * 1970-01-21 1971-10-08 Grace W R Ltd
FR2132440A1 (fr) * 1971-04-06 1972-11-17 Ici Ltd
FR2347854A1 (fr) * 1976-04-06 1977-11-04 Vibrachoc Sa Nappe de protection, notamment pour appareils electriques ou radioelectriques
US4128251A (en) * 1977-09-21 1978-12-05 Champion Laboratories, Inc. Sealing gasket for air filter
GB2134811A (en) * 1983-02-08 1984-08-22 Ross Bryan Barrington Filter unit
FR2591530A1 (fr) * 1985-12-17 1987-06-19 Stratinor Materiau composite stratifie, un procede pour sa preparation et son application au traitement des phenomenes electrostatiques ou electromagnetiques
DE3918342C1 (fr) * 1989-06-06 1990-06-07 Knecht Filterwerke Gmbh, 7000 Stuttgart, De
WO1991001621A2 (fr) * 1989-07-27 1991-02-21 Hyperion Catalysis International, Inc. Composites et procedes de fabrication
US5066318A (en) * 1990-04-13 1991-11-19 Pcf Group, Inc. Filter element gasket

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19848774A1 (de) * 1998-10-22 2000-05-04 Herding Gmbh Filtereinheit zum auswechselbaren Einsetzen in das Gehäuse einer Filteranlage
US6183530B1 (en) 1998-10-22 2001-02-06 Herding Gmbh Filtertechnik Filter unit suitable for exchangeable insertion in the housing of a filter system
EP1594590B1 (fr) * 2003-01-31 2008-04-02 Cft Gmbh Compact Filter Technic Filtre a poussiere destine a etre utilise dans des exploitations exposees au danger provoque par des gaz

Also Published As

Publication number Publication date
GB2294468B (en) 1997-04-16
GB2294468A (en) 1996-05-01
GB9521964D0 (en) 1996-01-03

Similar Documents

Publication Publication Date Title
KR100913629B1 (ko) 전면 유입용 필터 요소
EP0170643B1 (fr) Joint rétrécissant pour ensemble de filtre plié
US4902306A (en) Dual-dipole electrostatic air filter
US6740136B2 (en) Interconnected filter frame and filter framing method
AU762646B2 (en) Filtration disc including electric field formation
US8080086B2 (en) Static dissipative filtration media
WO1996013320A1 (fr) Materiau polymere composite et electroconducteur
KR20000065029A (ko) 홈형필터매체및그제조방법
CA2187963A1 (fr) Boite filtrante et procede pour le filtrage de peintures contenant des particules
US5851250A (en) Filter element for air cleaner
WO1987001301A1 (fr) Cartouche a filtre conductrice et son procede de production
CN111135651A (zh) 具有反向折叠结构的过滤元件、盒式过滤器和滤芯
KR960000004B1 (ko) 공기필터 및 이러한 필터를 구축하는데 사용되는 모듈(Module)
US4016928A (en) Heat exchanger core having expanded metal heat transfer surfaces
KR100763063B1 (ko) 유동 채널 여과 매개체와 흡착제 미립자 여과 매개체를포함하는 복합 필터 시스템
US20040065203A1 (en) Disc type air filters
JP4203787B2 (ja) 流体フィルタ
US3620873A (en) Making metal-plastic gasket materials
WO1996013320B1 (fr) Materiau polymere composite et electroconducteur
GB2375494A (en) Filter assembly
JP3841475B2 (ja) 中空糸膜モジュール
US20030080043A1 (en) Filter cell design
US6672909B2 (en) Electrical connection and connectors
EP0199528A2 (fr) Filtre
RU2031694C1 (ru) Фильтрующий модуль с ребрами жесткости для фильтра тонкой очистки воздуха

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载