DE3815146C1 - Web-shaped filter material, in particular filter paper for liquid filters or gas filters, having moulded beads - Google Patents

Web-shaped filter material, in particular filter paper for liquid filters or gas filters, having moulded beads

Info

Publication number
DE3815146C1
DE3815146C1 DE3815146A DE3815146A DE3815146C1 DE 3815146 C1 DE3815146 C1 DE 3815146C1 DE 3815146 A DE3815146 A DE 3815146A DE 3815146 A DE3815146 A DE 3815146A DE 3815146 C1 DE3815146 C1 DE 3815146C1
Authority
DE
Germany
Prior art keywords
filter material
beads
filter
web
thickness
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.)
Expired
Application number
DE3815146A
Other languages
German (de)
Inventor
Sigbert 7322 Donzdorf De Widmann
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.)
Mahle Filtersysteme GmbH
Original Assignee
Knecht Filterwerke 7000 Stuttgart De GmbH
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 Knecht Filterwerke 7000 Stuttgart De GmbH filed Critical Knecht Filterwerke 7000 Stuttgart De GmbH
Priority to DE3815146A priority Critical patent/DE3815146C1/en
Priority to DE3844539A priority patent/DE3844539C1/en
Priority to EP89710035A priority patent/EP0341192A1/en
Priority to EP89905067A priority patent/EP0415954A1/en
Priority to JP1504451A priority patent/JPH03505058A/en
Priority to PCT/DE1989/000277 priority patent/WO1989010781A1/en
Priority to US07/603,775 priority patent/US5080790A/en
Application granted granted Critical
Publication of DE3815146C1 publication Critical patent/DE3815146C1/en
Expired legal-status Critical Current

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
    • B01D46/52—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
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/016—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements with corrugated, folded or wound filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
    • B01D29/07—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/23—Supported filter elements arranged for outward flow filtration
    • B01D29/232—Supported filter elements arranged for outward flow filtration with corrugated, folded or wound sheets
    • 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
    • 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
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)

Abstract

In a web-shaped filter material, in particular filter paper for liquid filters or gas filters having moulded beads, in which the filter material is folded in a zigzag shape into individual sections and these sections are spaced from each other by the beads, the stiffness and the strength of the beads is to be increased in order to prevent loss of the spacing action of the beads after relatively long service lives. This is achieved by the filter material having a thickness in cross-sections perpendicular to the plane of the web, which thickness continuously decreases within the region of the beads starting from the undeformed filter web sections as far as a zenith height H of the individual beads, and the filter material being increasingly compressed in the course of this for the decreasing thickness. The ratio of zenith height H to width B of a bead is to be as far as possible less than 2. <IMAGE>

Description

Die Erfindung betrifft bahnenförmiges Filtermaterial, insbesondere Filterpapier für Flüssigkeits- oder Gasfilter, mit eingeformten Sicken nach dem Oberbe­ griff des Patentanspruchs 1.The invention relates to web-shaped filter material, especially filter paper for liquid or Gas filter, with molded beads on the top handle of claim 1.

Ein derartiges Filtermaterial ist beispielsweise aus DE-OS 19 30 715 bekannt. Wie dort beschrieben ist, sind solche Filtermaterialien relativ flexibel und können ein Harz oder einen anderen Stoff enthalten, der durch Wärme aushärtbar ist, um der Filterbahn eine ausreichende Steifigkeit zu geben. Zumindest der Abschluß der unter Wärme erfolgenden Aushärtung des die Steifigkeit des Filtermaterials bewirkenden Zu­ satzstoffes erfolgt gleichzeitig mit dem Einformen der Sicken und/oder im Anschluß an den Einformvor­ gang. Durch das Aushärten bei oder nach dem Einformen der Sicken erhalten die Sicken die für den Einsatz des Filtermaterials erforderliche Steifigkeit. Eine Steifigkeit der Sicken ist zur Erfüllung ihrer Ab­ standhalterfunktion zwischen den zick-zack-förmig ge­ falteten einzelnen Faltenabschnitten notwendig. Denn insbesondere abströmseitig stehen die von zwei be­ nachbarten Filterbahnabschnitten aneinanderliegenden Sicken unter dem sich durch den Durchgangswiderstand des Filtermaterials beim Filtern aufbauenden Druck des anströmenden zu filternden Mediums.Such a filter material is made of, for example DE-OS 19 30 715 known. As described there such filter materials are relatively flexible and can contain a resin or other substance, which is heat curable around the filter web to give sufficient rigidity. At least that Completion of the heat curing of the the rigidity of the filter material Substitute occurs simultaneously with the molding the beads and / or following the molding corridor. By curing during or after molding the beads receive the beads for use of the filter material required rigidity. A Stiffness of the beads is to fulfill their ab stand function between the zig-zag ge folded individual fold sections necessary. Because in particular on the downstream side there are two be adjacent filter web sections adjacent to each other  Beading under the through resistance of the filter material when the pressure builds up of the inflowing medium to be filtered.

Bei nichtausreichender Steifigkeit der Sicken geben diese bei Betrieb des Filters nach mit der Folge, daß die durch sie gestützten Filterbahnabschnitte ihren durch den Ausgangszustand der Sicken gegebenen Ab­ stand zueinander verlieren. Dadurch kann es zumindest in den Flächen zwischen den einzelnen Sicken zu einem Aneinanderstoßen benachbarter Filterbahnabschnitte kommen. In solchen Flächen, in denen benachbarte Fil­ terabschnitte aneinanderliegen, kann bei zick-zack­ förmig gefalteten Filterbahnen eine Filtration nicht mehr erfolgen. Daher ist es wichtig, die Sicken so steif auszuführen, daß ein Nachgeben unter normalen Betriebsbedingungen des Filters vermieden ist.If the beads are not sufficiently rigid, give this after operation of the filter with the consequence that the filter web sections supported by it Ab given by the initial state of the beads got lost to each other. At least it can in the areas between the individual beads to one Butting of adjacent filter web sections come. In areas where neighboring fil with zig-zag filter sheets folded in the form of a filtration done more. Therefore it is important to keep the beads like this stiff to execute that a yield under normal Operating conditions of the filter is avoided.

Dieses Ziel konnte bei den gattungsgemäßen bahnenför­ migen Filtermaterialien bisher noch nicht zufrieden­ stellend erreicht werden.This goal could be achieved with the generic Bahnför not yet satisfied with filter materials be achieved.

Hier eine Verbesserung zu schaffen, ist die Aufgabe der vorliegenden Erfindung.The task is to create an improvement here of the present invention.

Gelöst wird diese Aufgabe durch nach den kennzeich­ nenden Merkmalen des Patentanspruchs 1 geformte und aufgebaute Sicken.This problem is solved by according to the characteristics nenden features of claim 1 shaped and built-up beads.

Die Ausführung der Sicken nach Anspruch 2 erhöht die Sicherheit bei der Einhaltung einer vorgegebenen Sik­ kensteifigkeit bzw. Festigkeit noch zusätzlich. The design of the beads according to claim 2 increases the Certainty when complying with a given sik additional rigidity or strength.  

Eine solche Sicherheit läßt sich insbesondere bei länglich ausgerichteten Sicken nach Anspruch 3 recht zuverlässig erreichen.Such security can be found in particular elongated beads according to claim 3 right Reach reliably.

Eine weitere äußerst wirkungsvolle Steigerung der Sickensteifigkeit läßt sich nach Anspruch 4 dadurch erzielen, daß die Sicke in zumindest einer senkrecht zum ungeprägten Filtermaterial verlaufenden Quer­ schnittsebene einer Kettenlinie folgend gewölbt ist.Another extremely effective increase in Bead stiffness can be according to claim 4 achieve the bead in at least one perpendicular to the unembossed filter material running cross section plane is curved following a chain line.

Beste Filtrationsergebnisse lassen sich mit Sicken erzielen, deren Abmessungen durch die Merkmale des Anspruchs 5 bestimmt sind.The best filtration results can be achieved with beads achieve whose dimensions by the characteristics of Claim 5 are determined.

Zur Veranschaulichung der durch die Erfindung angege­ benen Sickenform ist in der Zeichnung ein senkrecht zur Ebene der Filterbahn verlaufender Querschnitt durch eine Sicke dargestellt.Illustrating those indicated by the invention Ben bead shape is a vertical in the drawing Cross-section running to the level of the filter web represented by a bead.

Mit H ist die Zenithöhe der Sicke, mit B die Sicken­ breite in Filterbahnebene und mit D die Dicke des Filtermaterials in unverformtem Zustand angegeben. H is the zenith height of the corrugation, B the corrugation width in the filter path plane and D the thickness of the filter material in the undeformed state.

Die Dicke des Filtermaterials im Zenit der Sicke be­ trägt mindestens 80% der Dicke D des unverformten Filtermaterials. Sie ist im übrigen abhängig von der Ausgangsdichte des Filterpapiers. Die geringere Dik­ ke im Zenit der Sicke wird bei dem Verformungsvorgang durch Verdichten des Filtermaterials bewirkt.The thickness of the filter material in the zenith of the bead is at least 80% of the thickness D of the undeformed filter material. It is also dependent on the initial density of the filter paper. The lower thickness in the zenith of the bead is brought about in the deformation process by compressing the filter material.

Um eine solche Verdichtung des Filtermarerials im Ze­ nit einer Sicke zu erreichen, kann die Fittermateri­ albahn durch ein die Sicken einformendes Walzenpaar geführt werden, bei dem die die Sicke formende posi­ tive Erhebung auf der einen Walze und die entspre­ chende negative Ausnehmung in der Gegenwalze unter­ schiedliche Formen aufweisen. Die unterschiedliche Formgebung geht dabei dahin, daß bei Eingriff der po­ sitiven Erhebung der einen Walze in die entsprechende negative Ausnehmung der Gegenwalze der Oberflächenab­ stand in dem sich bildenden von dem Filtermaterial ausgefüllten Spalt vom Zenit der zu formenden Sicke ausgehend sich kontinuierlich zum Sickenfuß hin er­ weitert. Dadurch wird das Filtermaterial beim Ein­ greifen der positiven Erhebung der einen Walze in die Gegenausnehmung der Gegenwalze entsprechend verdich­ tet, wenn der gegenseitige Abstand der Walzen so ein­ gestellt ist, daß das Filterpapier in den nicht zu verformenden Bereichen in dem Walzenspalt beidseitig so anliegt, daß es gerade noch nicht verdichtet wird. In order to compress the filter material in the Ze The Fittermatteri cannot reach with a bead  albahn through a pair of rollers forming the beads in which the posi tive survey on one roller and the corresponding Negative recess in the counter roll below have different shapes. The different Shaping goes that when the po sitative elevation of a roller in the corresponding negative recess of the counter roll of the surfaces stood in the forming of the filter material filled gap from the zenith of the bead to be formed proceeding continuously towards the corrugated foot continues. This will cause the filter material to turn on engage the positive elevation of one roller Compress the counter recess of the counter roller accordingly tet when the mutual distance between the rollers is that the filter paper is not in the deforming areas in the nip on both sides so that it is just not being compressed.  

Gute Ergebnisse erhält man bei einem Verhältnis B/H von kleiner als 2.Good results are obtained with a ratio B / H of less than 2.

Claims (5)

1. Bahnenförmiges Filtermaterial, insbesondere Fil­ terpapier für Flüssigkeits- oder Gasfilter, mit eingeformten Sicken, wobei das Filtermaterial zick-zack-förmig in einzelne Abschnitte gefaltet ist und diese Abschnitte über die Sicken in Ab­ stand zueinander gehalten sind, dadurch gekennzeichnet, daß das Filtermaterial in senkrecht zur Bahnebene gelegten Querschnitten eine Dicke aufweist, die innerhalb des Bereiches der Sicken ausgehend von den unverformten Filterbahnabschnitten bis hin zu einer Zenithöhe (H) der einzelnen Sicken stetig abnimmt, und daß dabei das Filtermaterial im Sin­ ne der abnehmenden Dicke zunehmend verdichtet ist. .1. Web-shaped filter material, in particular Fil terpapier for liquid or gas filters, with molded beads, the filter material is folded in a zigzag shape into individual sections and these sections are held in relation to each other in Ab, characterized in that the filter material in cross-sections perpendicular to the plane of the web has a thickness which steadily decreases within the area of the beads, starting from the undeformed filter web sections up to a zenith height ( H ) of the individual beads, and that the filter material is increasingly compressed in the sense of the decreasing thickness. . 2. Filtermaterial nach Anspruch 1, dadurch gekennzeichnet, daß in jeder senkrecht zur Filterbahnebene durch eine Sicke gelegten Querschnittsebene eine maß­ lich gleiche Dickenverminderung in Richtung einer jeden Zenithöhe (H) der einzelnen Sicke gegeben ist. 2. Filter material according to claim 1, characterized in that in each perpendicular to the filter web plane through a bead cross-sectional plane a dimensionally equal thickness reduction in the direction of each zenith height ( H ) of the individual bead is given. 3. Filtermaterial nach Anspruch 1, dadurch gekennzeichnet, daß bei länglich ausgerichteten Sicken die Dicke zumindest in den quer zur Längsrichtung gegen­ überliegenden Flanken einer Sicke bei jeweils gleichem senkrechten Abstand zur unverformten Filterbahnehene jeweils gleich ist.3. Filter material according to claim 1, characterized, that with elongated beads the thickness at least in the transverse to the longitudinal direction overlying flanks of a bead at each same vertical distance to the undeformed Filter path level is the same in each case. 4. Filtermaterial nach einem der vorhergehenden An­ sprüche, dadurch gekennzeichnet, daß die Sicken eine Breite (B) innerhalb der un­ geprägten Filterbahnebene aufweisen, die zu der Zenithöhe (H) in einem Verhältnis von kleiner als 2 steht.4. Filter material according to one of the preceding claims, characterized in that the beads have a width ( B ) within the un-embossed filter track plane, which is in a ratio of less than 2 to the zenith height ( H ). 5. Filtermaterial nach einem der vorhergehenden An­ sprüche, dadurch gekennzeichnet, daß die Dicke des Filtermaterials im Zenit der Sicken weniger als 80% der Dicke des unverformten Filtermaterials beträgt.5. Filter material according to one of the preceding An claims, characterized, that the thickness of the filter material at the zenith of Beading less than 80% of the thickness of the undeformed Filter material.
DE3815146A 1988-05-04 1988-05-04 Web-shaped filter material, in particular filter paper for liquid filters or gas filters, having moulded beads Expired DE3815146C1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE3815146A DE3815146C1 (en) 1988-05-04 1988-05-04 Web-shaped filter material, in particular filter paper for liquid filters or gas filters, having moulded beads
DE3844539A DE3844539C1 (en) 1988-05-04 1988-05-04 Web-form filter material, in particular filter paper for liquid filters or gas filters, having shaped-in beadings
EP89710035A EP0341192A1 (en) 1988-05-04 1989-04-29 Filter web with formed crimps and filter body using this material
EP89905067A EP0415954A1 (en) 1988-05-04 1989-04-29 Strips of filter material with moulded corrugations and filter bodies made of this material
JP1504451A JPH03505058A (en) 1988-05-04 1989-04-29 Band-shaped filter media with integrally molded corrugated portions and filter bodies made of this material
PCT/DE1989/000277 WO1989010781A1 (en) 1988-05-04 1989-04-29 Strips of filter material with moulded corrugations and filter bodies made of this material
US07/603,775 US5080790A (en) 1988-05-04 1989-04-29 Strip-shaped filter material with crimps molded in and filter elements made of this material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3815146A DE3815146C1 (en) 1988-05-04 1988-05-04 Web-shaped filter material, in particular filter paper for liquid filters or gas filters, having moulded beads
DE3844539A DE3844539C1 (en) 1988-05-04 1988-05-04 Web-form filter material, in particular filter paper for liquid filters or gas filters, having shaped-in beadings

Publications (1)

Publication Number Publication Date
DE3815146C1 true DE3815146C1 (en) 1989-09-21

Family

ID=25867736

Family Applications (2)

Application Number Title Priority Date Filing Date
DE3844539A Expired DE3844539C1 (en) 1988-05-04 1988-05-04 Web-form filter material, in particular filter paper for liquid filters or gas filters, having shaped-in beadings
DE3815146A Expired DE3815146C1 (en) 1988-05-04 1988-05-04 Web-shaped filter material, in particular filter paper for liquid filters or gas filters, having moulded beads

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE3844539A Expired DE3844539C1 (en) 1988-05-04 1988-05-04 Web-form filter material, in particular filter paper for liquid filters or gas filters, having shaped-in beadings

Country Status (1)

Country Link
DE (2) DE3844539C1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1930715A1 (en) * 1968-09-16 1970-11-26 Cambridge Filter Corp Gas filter insert

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1930715A1 (en) * 1968-09-16 1970-11-26 Cambridge Filter Corp Gas filter insert

Also Published As

Publication number Publication date
DE3844539C1 (en) 1989-09-21

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