EP2072667A1 - Bande pour une machine destinée à la fabrication de matériaux en bande et procédé de fabrication d'une telle bande - Google Patents

Bande pour une machine destinée à la fabrication de matériaux en bande et procédé de fabrication d'une telle bande Download PDF

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Publication number
EP2072667A1
EP2072667A1 EP08161408A EP08161408A EP2072667A1 EP 2072667 A1 EP2072667 A1 EP 2072667A1 EP 08161408 A EP08161408 A EP 08161408A EP 08161408 A EP08161408 A EP 08161408A EP 2072667 A1 EP2072667 A1 EP 2072667A1
Authority
EP
European Patent Office
Prior art keywords
measure
layer
layers
fiber material
polymer
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.)
Withdrawn
Application number
EP08161408A
Other languages
German (de)
English (en)
Inventor
Robert Crook
Robert Eberhardt
Arved Westerkamp
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.)
Voith Patent GmbH
Original Assignee
Voith Patent 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 Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2072667A1 publication Critical patent/EP2072667A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0036—Multi-layer screen-cloths
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/083—Multi-layer felts
    • 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.]
    • Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
    • Y10T428/24124—Fibers

Definitions

  • the present invention relates to a belt for a machine for producing sheet material and to a method for producing such a belt.
  • Such belts which are used, for example, in press sections of paper machines, can be constructed so that a plurality of layers of fiber material, for example by needle punching, are attached to a support structure, for example a woven fabric, a scrim or a so-called spiral link structure, on a web material contact side , Particulate polymer material is then first introduced into these layers of fiber material, for example by applying an aqueous dispersion with polymer particles from the web material contact side. The polymer particles move together with the liquid in the inner volume region of the fiber material.
  • this object is achieved by a belt, in particular press felt, for a machine for the production of web material, in particular paper or cardboard, comprising a support structure and at least one layer of fibrous material firmly bonded to the support structure and containing fibers thereof Layer at least partially covers as a polymer film.
  • fibers of at least one layer of fiber material are coated with a polymer film.
  • This polymer film causes a stiffening of the layer of fiber material, which is why this layer compacts significantly less in operation than a conventional fiber layer.
  • the band is especially permeable to fluid, such as water.
  • the layer containing the polymeric material is disposed on the side of the support structure facing the web material contact surface of the belt. Since substantially the water absorption capacity of the band is made available between the web material contact surface and the support structure, this ensures a permanently high water absorption capacity of the band.
  • the tape of the invention comprises a plurality of layers of fibrous material in which the fibers are coated with a film coating polymer material is included.
  • the fibers of the at least one fiber layer are glued to one another at fiber crossing and / or fiber contact points by the polymer film.
  • the fibers of the fiber layer are crosslinked together and it is a highly elastic structure consisting of the fibers and the film covering this film formed.
  • the polymer film is formed from or comprises an elastomeric polymer material.
  • an elastomeric polymer material is, for example, elastomers polyurethane into consideration.
  • the content of polymer material is higher in a layer of fiber material which is closer to a web material contact surface than in a layer of fiber material located farther away from the web material contact surface.
  • the content of polymer material is lower in a layer of fiber material which is closer to the web material contact surface than in a layer of fiber material located farther away from the web material contact surface.
  • This concentration of the film-forming polymer material which is primarily provided in the volume range of the band, has a particularly advantageous effect on the compaction behavior and the ability to return the band.
  • fiber material it may be contained in several layers of fiber material, the same polymer material. Of course it is also possible, depending on the desired elasticity property and different polymer material in several Use layers of fiber material.
  • At least one of the layers of fiber material are formed as a nonwoven layer.
  • the support structure may be fabric-like or random.
  • the polymer material forming the film may further influence the permeability of the fiber material layer containing it.
  • at least one of the layers of fiber material whose fibers are coated with the film has a permeability of at most 30cfm, preferably at most 10cfm, more preferably at most 7cfm.
  • At least one of the layers of fiber material contains a polymer film forming a polymer film and at least one layer of fiber material in which no polymer material is contained.
  • the particulate polymer material is introduced as an aqueous dispersion of particulate, in particular fine particulate polymer material in the layer of fiber material.
  • aqueous dispersions are known, for example, under the name "witcobond polymer dispersion” and are obtained, for example, from Baxenden Chemicals Ltd. distributed in England.
  • To provide the film of the polymer material it is possible to use preferably polymer dispersions based on polyurethane or polyacrylate, but also other or mixtures of several polymer dispersions, such as e.g. Impranil DLH or Witcobond 372-95 or any similar material having properties in comparable ranges.
  • the aqueous dispersion liquid is removed, whereby the polymer film is formed.
  • the individual layers of fiber material can be connected in the measure d) with the support structure by needling.
  • the needlepunching has the advantage that when entering needles in the fiber material in the needle channels thus formed particles are dragged into adjacent layers, so that by the particles also a connection between individual layers is generated.
  • An embodiment of the method according to the invention provides that the measure c) is performed before the measure d).
  • the measure c) before the measure d) and the measure d) before the measure e) is carried out.
  • the polymer material is introduced into the at least one fiber layer, subsequently this layer is bonded to the support structure before the polymer material is caused to form a fiber of the fiber layer covering film.
  • the polymeric material may be incorporated separately into each of the layers of fibrous material, i. as long as they are not yet connected to each other and to the support structure. In this case, the amount and type of the introduced polymer material can be adjusted selectively and independently.
  • the measure c) before the measure e) and the measure e) before the measure d) is carried out.
  • the polymeric material introduced into the layer of fibrous material is caused to first form a film before the fibrous material layer is bonded to the support structure.
  • the polymer material can be introduced separately into each of the layers of fiber material, ie, as long as they are not yet together and with each other Trage Modell are connected. In this case, the amount and type of the introduced polymer material can be adjusted selectively and independently.
  • the measure d) before the measure c) and the measure c) before the measure e) is performed.
  • the at least one layer of fibrous material is first bonded to the support structure, before subsequently the polymer material forming the film is introduced into the at least one fiber layer and subsequently the film formation is effected.
  • At least 50% of the particles of the particulate polymer material have a size in the range of 2.0nm to 10 ⁇ m.
  • all particles of the particulate polymer material have a size of not more than 10 .mu.m, in particular of not more than 2 .mu.m.
  • the particle size the maximum dimension of the particles in a spatial direction, i. in length or width or height, to be understood.
  • the polymer material is introduced only over part of the width of the at least one layer of fiber material.
  • a further embodiment of the invention provides that at least one of the layers of fiber material, which contains the polymer material, is formed by a plurality of partial width, in relation to the width of the layer, partial-width layer portions which are arranged adjacent to each other to provide the layer overlapping or abutting each other.
  • the method comprises a hot calendering, wherein the hot calendering always takes place after the measure d).
  • a development of the method according to the invention further provides that in at least one of the layers of fiber material, in particular in the web material contact surface providing position and / or in the machine contact surface providing position, another polymer material is introduced, which together with fibers of this layer a permeable composite structure forms by the polymer material fills only partially formed between fibers of this layer formed cavities.
  • the further polymer material is introduced in particulate form, in particular in the form of an aqueous dispersion of particles, into the fiber layer and subsequently abraded to form the permeable composite structure and solidifies again.
  • the further polymer material preferably forms an integral and permeable polymer layer.
  • a one-piece polymer layer is to be understood here as meaning a polymer layer which is formed from a single coherent piece.
  • the polymer layer has openings extending therethrough, the openings in the polymer layer being formed by the polymer material forming the polymer layer only partially filling and / or bridging voids formed between fibers of the fiber layer.
  • the fiber material if it is, for example, of polyamide, for example, be dissolved out by means of formic acid.
  • the particles of the further polymer material have a larger particle size than the particles of the polymer material forming the film.
  • the Fig. 1 shows in sectional view a belt 10 for the production of web material, which is used for example in a press section of a paper machine to move through the paper to be manufactured by press nips.
  • the band 10 comprises as a load-receiving layer a support structure 12, which may be formed for example as a fabric, as a scrim or as a so-called spiral link structure.
  • a layer 16 of fiber material may be connected to the support structure 12, for example, by needling.
  • a plurality of layers 20, 22, 24, 26 are provided of fiber material.
  • Each of these layers 20, 22, 24, 26 of fiber material contains in the illustrated intermediate production phase fine particles 28 of polymer material, for example polyurethane material, in aqueous dispersion. It can be seen that the density of the particles 28 in the individual layers 20, 22, 24, 26 is not the same. Thus, in the illustrated example, in the finished state then a web material contact surface 30 providing layer 20 of fiber material a comparatively high density of particles 28 is present, while the layers 22 and 26 have a significantly lower, mutually substantially equal density.
  • the layer 24 of fibrous material contains substantially no particles. The particles contained in this layer 24 are at boundary regions to the adjacent layers 22, 26 of fiber material and have entered these layers 24 in the situation.
  • the procedure is such that first the individual layers 20, 22, 24, 26 of fiber material or the starting material therefor, which for example is non-woven or felt-like, are interspersed with the particles 28. This can be done, for example, by applying to this material, for example, an aqueous dispersion containing the particles 28 therein.
  • particles 28 in the individual layers 20, 22, 24, 26 of fibrous material can be achieved by the content of the particles 28 in the dispersion, by the number of repetitions of the step of applying such a dispersion in accordance with the porous structure of the individual layers ,
  • the carrier liquid of the dispersion for example water, for example, removed by the action of temperature, whereby in each of the layers on the fibers of a polymer film is formed, the fibers of these layers at least partially covers and connects at the intersections.
  • the layers are layered over the support structure 12, for example, by being wound spirally or helically around the support structure 12 carried over two rollers.
  • the layers 20, 22, 24, 26 of fiber material are then connected to the support structure 12, wherein this bonding is preferably carried out by needling.

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EP08161408A 2007-12-21 2008-07-30 Bande pour une machine destinée à la fabrication de matériaux en bande et procédé de fabrication d'une telle bande Withdrawn EP2072667A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1581607P 2007-12-21 2007-12-21

Publications (1)

Publication Number Publication Date
EP2072667A1 true EP2072667A1 (fr) 2009-06-24

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Family Applications (1)

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EP08161408A Withdrawn EP2072667A1 (fr) 2007-12-21 2008-07-30 Bande pour une machine destinée à la fabrication de matériaux en bande et procédé de fabrication d'une telle bande

Country Status (2)

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US (1) US20090169804A1 (fr)
EP (1) EP2072667A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2267221A1 (fr) * 2009-06-23 2010-12-29 Voith Patent GmbH Procédé de fabrication d'un attelage de machine à papier
WO2011036164A1 (fr) * 2009-09-22 2011-03-31 Voith Patent Gmbh Bande de séchage pour un dispositif de séchage par condensation
US8496785B2 (en) 2009-08-04 2013-07-30 Voith Patent Gmbh Combination of a press felt with a pressure roll covering and/or suction roll covering for a paper machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007055902A1 (de) * 2007-12-21 2009-06-25 Voith Patent Gmbh Band für eine Maschine zur Herstellung von Bahnmaterial
DE102007055801A1 (de) * 2007-12-21 2009-06-25 Voith Patent Gmbh Band für eine Maschine zur Herstellung von Bahnmaterial und Verfahren zur Herstellung eines derartigen Bands

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4267227A (en) * 1980-01-11 1981-05-12 Albany International Corp. Press fabric resistant to wad burning
US4439481A (en) * 1983-03-04 1984-03-27 Albany International Corp. Resole treated papermakers felt and method of fabrication
WO2003091498A1 (fr) * 2002-04-26 2003-11-06 Tamfelt Oyj Abp Feutre de presse
WO2004085727A2 (fr) * 2003-03-25 2004-10-07 Voith Fabrics Patent Gmbh Feutre presse composite
EP1757728A1 (fr) * 2005-08-26 2007-02-28 Voith Patent GmbH Mélange contenant des particules de polymère et des fibres, procédé de fabrication et produits comme toiled d'essorage fabriqué avec ce procédé
WO2008122461A1 (fr) * 2007-04-04 2008-10-16 Voith Patent Gmbh Tissu de machine à papier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004006103A1 (de) * 2004-02-06 2005-10-20 Voith Fabrics Patent Gmbh Modular aufgebaute Papiermaschinenbespannung
JP2006176904A (ja) * 2004-12-21 2006-07-06 Ichikawa Co Ltd 抄紙搬送フェルトおよび該抄紙搬送フェルトを備えた抄紙機のプレス装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4267227A (en) * 1980-01-11 1981-05-12 Albany International Corp. Press fabric resistant to wad burning
US4439481A (en) * 1983-03-04 1984-03-27 Albany International Corp. Resole treated papermakers felt and method of fabrication
WO2003091498A1 (fr) * 2002-04-26 2003-11-06 Tamfelt Oyj Abp Feutre de presse
WO2004085727A2 (fr) * 2003-03-25 2004-10-07 Voith Fabrics Patent Gmbh Feutre presse composite
EP1757728A1 (fr) * 2005-08-26 2007-02-28 Voith Patent GmbH Mélange contenant des particules de polymère et des fibres, procédé de fabrication et produits comme toiled d'essorage fabriqué avec ce procédé
WO2008122461A1 (fr) * 2007-04-04 2008-10-16 Voith Patent Gmbh Tissu de machine à papier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2267221A1 (fr) * 2009-06-23 2010-12-29 Voith Patent GmbH Procédé de fabrication d'un attelage de machine à papier
US8496785B2 (en) 2009-08-04 2013-07-30 Voith Patent Gmbh Combination of a press felt with a pressure roll covering and/or suction roll covering for a paper machine
WO2011036164A1 (fr) * 2009-09-22 2011-03-31 Voith Patent Gmbh Bande de séchage pour un dispositif de séchage par condensation

Also Published As

Publication number Publication date
US20090169804A1 (en) 2009-07-02

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