EP1770203A2 - Toile pour machine à papier - Google Patents

Toile pour machine à papier Download PDF

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Publication number
EP1770203A2
EP1770203A2 EP20060119221 EP06119221A EP1770203A2 EP 1770203 A2 EP1770203 A2 EP 1770203A2 EP 20060119221 EP20060119221 EP 20060119221 EP 06119221 A EP06119221 A EP 06119221A EP 1770203 A2 EP1770203 A2 EP 1770203A2
Authority
EP
European Patent Office
Prior art keywords
covering according
fabric
layers
layer
polyurethane film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20060119221
Other languages
German (de)
English (en)
Other versions
EP1770203A3 (fr
Inventor
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 EP1770203A2 publication Critical patent/EP1770203A2/fr
Publication of EP1770203A3 publication Critical patent/EP1770203A3/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Withdrawn legal-status Critical Current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
    • 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
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D21F3/0227—Belts or sleeves therefor
    • 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
    • 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
    • D21F7/086—Substantially impermeable for transferring fibrous webs
    • 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
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/902—Woven fabric for papermaking drier section
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31554—Next to second layer of polyamidoester
    • 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]
    • Y10T442/674—Nonwoven fabric with a preformed polymeric film or sheet

Definitions

  • the invention relates to a fabric for a machine for treating a material web, in particular fibrous web. It also relates to particular uses of this fabric.
  • Coatings of transfer belts or belts for use in paper machines are currently produced mainly by doctor blade methods.
  • polymers are applied to a textile support, which is based on a press felt in most cases, and the surface is doctored.
  • a film solution has already been proposed in which polyurethane films are endlessly welded in the transverse direction and then wrapped around a carrier.
  • the carrier is a conventional felt base fabric which is combined with nonwoven layers and a so-called "arcus" thread layer.
  • this solution tends to delaminate, since the support layer on which the films are laminated, with high shear stress, such as may occur in a press nip dissolves. As a result, delamination occurs.
  • the invention has for its object to provide an improved covering of the type mentioned.
  • the covering should be easier in particular be produced.
  • there should be the possibility of increasing the functionality of the covering for example in the case of a transfer belt, in particular for critical applications, to which, for example, a double nip counts, for example in a so-called centerbelt or central band application.
  • the fabric has a multilayer structure with at least two layers each formed by at least one polyurethane film between which a layer of a reinforcing fabric is located, the mesh sizes are chosen so that the two adjacent layers of polyurethane film in the Touch stitches.
  • the fabric can be made easier.
  • the particular desired functionality of the fabric can be increased accordingly. It is thus possible, for example, a design of the fabric especially for critical applications. It can, for example, in a press arrangement with a double nip, so for example, in a so-called “centerbelt" arrangement are used with appropriate design.
  • the two layers of polyurethane film adjacent to a respective reinforcing fabric are joined together in the meshes of the reinforcing fabric.
  • the mesh sizes of the reinforcing fabric are so dimensioned that the two adjacent layers of polyurethane film enter into a mesh in the mesh.
  • the reinforcing fabric preferably comprises a glass fabric.
  • a corresponding fiberglass mesh structure is characterized in particular by the fact that it is very light and stable.
  • the reinforcing fabric comprises a so-called leno fabric.
  • the fabric has a multilayer structure with more than two layers each formed by at least one polyurethane film, wherein viewed in the thickness direction, at least in sections, between each two layers of polyurethane film in each case a layer of a reinforcing fabric is arranged.
  • the mesh widths of a respective layer of reinforcing fabric are again selected such that the two adjacent layers of polyurethane film touch each other in the meshes and in these preferably reconnect with one another or are finally joined together in these meshes.
  • the respective reinforcement fabric preferably again comprises a glass fabric.
  • the thickness of a respective polyurethane film is in a range of about 50 to about 500 microns.
  • the thickness of a respective layer of polyurethane film in this range is from about 50 to about 500 microns.
  • At least one textile reinforcing layer is provided, which is preferably arranged between successive polyurethane films.
  • the at least one textile reinforcement layer preferably comprises: a fabric or a scrim or a knit or a knit or a wound bundle of threads or a fleece.
  • a reinforcing layer can be formed, for example, by a fabric of polymer threads, such as PA or PE. Additionally or alternatively, it is conceivable that a reinforcing layer is formed by a fleece of glass fibers. Furthermore, for example, additionally or alternatively, it is conceivable that a reinforcing layer is formed by a scrim of glass or carbon or aramid fibers.
  • a respective reinforcing fabric comprises weft and warp threads whose density is selected such that the resulting stitches are sufficiently large for the two adjacent laminated layers of polyurethane film to contact each other in the stitches and preferably to form a join in them.
  • the various layers are wound up into a layer structure.
  • the layers may in particular be wound diagonally or obliquely to the running direction of the clothing.
  • the layers may overlap at least partially, wherein the thickness of a respective layer in this case should be suitably ⁇ 300 microns smaller.
  • each layer in thicker layers, these can additionally abut on the edge in the area.
  • the thickness of each layer is preferably ⁇ 300 ⁇ m.
  • the different layers are at least partially differently designed or configured.
  • the different layers of polyurethane film can at least partially procure or be designed differently.
  • the different layers differ at least partially in terms of their functionality.
  • the different layers of polyurethane film may in particular at least partially differ in terms of their functionality again.
  • a preferred embodiment is characterized in that the position on the side of the material web is such that it allows the best possible detachment of the material web.
  • the position on the side of the material web can advantageously be such that it has the lowest possible tendency to become soiled.
  • the position on the running side ie the machine side
  • the position on the running side can expediently also have a profiled or three-dimensionally structured polyurethane cover film. With a correspondingly resistant, for example, profiled cover sheet on the running side, a corresponding abrasion resistance results.
  • the cover layer formed on the running side from one or more films may in this case have a thickness of up to 1.5 mm.
  • the layer on the side of the material web comprises a dirt-repellent polyurethane cover film.
  • the covering comprises at least one hydrophobic layer.
  • it may advantageously also comprise at least one hydrophilic layer.
  • the different layers of reinforcing fabric are at least partially differently designed or configured.
  • the different layers of reinforcing fabric differ at least partially in terms of thread density. Alternatively or additionally, they may also differ at least partially in terms of the denier.
  • At least one layer of reinforcing fabric preferably glass fabric, with a thickness of ⁇ 0.5 mm is provided.
  • the multilayer construction of the fabric can be permeable overall or impermeable overall. The same applies to the individual layers.
  • At least one outer layer is formed by a layer of polyurethane film, wherein preferably both outer layers are each formed by such a layer of polyurethane film.
  • the covering comprises a total of more than two layers, in particular more than four layers, preferably more than six layers, in particular more than eight layers, preferably more than ten layers and in particular about twelve layers.
  • a preferred embodiment is characterized in that the fabric is designed as a transfer belt.
  • this transfer belt preferably has a thickness ⁇ 4 mm, in particular a thickness ⁇ 3 mm.
  • the covering can be designed in particular as a dryer fabric.
  • the covering is made permeable.
  • the fabric according to the invention is therefore particularly advantageously usable in particular as a transfer belt or dryer fabric.
  • the single FIGURE of the drawing shows a schematic partial representation of the multilayer structure of a fabric for a machine for treating a material web, in particular fibrous web, which may be, for example, a paper, board or tissue web.
  • the reinforcing fabric 16 is preferably made of a glass fabric.
  • the string in question thus has a multilayer structure with at least two layers each formed by at least one polyurethane film, between which is a layer of a reinforcing fabric, the mesh sizes are chosen so that the two adjacent layers of polyurethane film in the mesh touch and the two layers of polyurethane film are connected to each other in these stitches.
  • the relevant clothing can be designed in particular as a transfer belt or as a dryer fabric.
  • polyurethane films of a thickness in a range of, for example, about 50 to about 500 ⁇ m are layered one over the other.
  • layers of polyurethane film glass fabrics are introduced, which are adjusted in terms of weft and warp thread density so that the resulting meshes are large enough for the laminated films to touch in the mesh and enter into a connection.
  • the layers can be wound in particular diagonally. They may at least partially overlap, provided that they are sufficiently thin, i. for example, have a thickness ⁇ 300 microns. Thicker layers can be added together in the surface at the edge.
  • the individual layers may differ in their functionality.
  • the paper-side layer expediently guarantees a corresponding so-called "release" of the paper web, wherein it preferably also shows the lowest possible tendency to become soiled.
  • the multilayer construction of the fabric results from a combination of polyurethane films and glass fabrics distributed over several layers.
  • the polyurethane film on the running or machine side is preferably structured in three dimensions.
  • the equipment and / or configuration of the polyurethane films can be varied according to the use within the structure or the multilayer structure of the fabric.
  • a wear-resistant polyurethane film on the running side and / or a dirt-repellent polyurethane film on the paper side is conceivable.
  • Both individual polyurethane films and the entire multilayer construction of the clothing can be, for example, hydrophobic or hydrophilic.
  • the configuration of the reinforcing fabric can also be varied.
  • different thread densities and / or different thread counts are conceivable.
  • a glass fabric is used.
  • the respective reinforcement fabric preferably has a thickness ⁇ 0.5 mm.
  • the corresponding glass fiber mesh structure is characterized in particular by being light and stable.
  • the glass fiber mesh structure can in particular also be designed as a so-called leno fabric.
  • the different material components are preferably wound up into a layer structure. These can, as already mentioned, overlap partially sideways or even abut each other.
  • the multi-layer structure or the structure of the fabric may be permeable or impermeable.
  • the covering in question can be used with particular advantage, in particular as a transfer belt or as a dryer fabric.
  • the band preferably has a thickness of ⁇ 3 mm.
  • Table 1 Location 1 (paper-contacting situation) polyurethane 0.30 mm Location 2 glass fabric 0.20 mm Location 3 polyurethane 0.20 mm Location 4 polyurethane 0.25 mm Location 5 glass fabric 0.20 mm Location 6 polyurethane 0.15 mm Location 7 glass fabric 0.25 mm Location 8 polyurethane 0.25 mm Location 9 glass fabric 0.25 mm Location 10 polyurethane 0.20 mm Location 11 glass fabric 0.25 mm Location 12 (running position) polyurethane 0.50 mm Location 1 (paper-contacting situation) polyurethane 0.30 mm Location 2 glass fabric 0.20 mm Location 3 polyurethane 0.20 mm Location 4 poly
  • the glass fabric may, for example, be formed as a conventional fabric or as a leno fabric. With the conventional fabric, simple or complex weaves are conceivable.
  • the fabric according to the invention may comprise one or more textile reinforcing layers, which are formed, for example, from polymer material.

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  • Laminated Bodies (AREA)
  • Paper (AREA)
EP20060119221 2005-09-30 2006-08-21 Toile pour machine à papier Withdrawn EP1770203A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510046902 DE102005046902A1 (de) 2005-09-30 2005-09-30 Papiermaschinenbespannung

Publications (2)

Publication Number Publication Date
EP1770203A2 true EP1770203A2 (fr) 2007-04-04
EP1770203A3 EP1770203A3 (fr) 2007-12-19

Family

ID=37621991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060119221 Withdrawn EP1770203A3 (fr) 2005-09-30 2006-08-21 Toile pour machine à papier

Country Status (3)

Country Link
US (1) US7871497B2 (fr)
EP (1) EP1770203A3 (fr)
DE (1) DE102005046902A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008131979A1 (fr) * 2007-04-27 2008-11-06 Voith Patent Gmbh Courroies de transfert

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007055864A1 (de) 2007-12-19 2009-06-25 Voith Patent Gmbh Transportband und Verfahren zu seiner Herstellung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4139634A1 (de) 1991-12-02 1993-06-03 Wuertt Filztuchfab Sieb
DE4312174A1 (de) 1993-04-14 1994-10-20 Wuertt Filztuchfab Trockensieb für Papiermaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4762751A (en) * 1984-07-30 1988-08-09 Ppg Industries, Inc. Flexible, chemically treated bundles of fibers, woven and nonwoven fabrics and coated bundles and fabrics thereof
IN163767B (fr) * 1985-05-29 1988-11-05 Pipercross Ltd
US5759927A (en) * 1995-07-24 1998-06-02 Meeker; Brian L. Glass-fiber-containing non-woven polymer web, and process for preparing same
EP1541337A1 (fr) * 2003-12-01 2005-06-15 Icopal Plastic Membranes A/S Membrane et son procédé de fabrication

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4139634A1 (de) 1991-12-02 1993-06-03 Wuertt Filztuchfab Sieb
DE4312174A1 (de) 1993-04-14 1994-10-20 Wuertt Filztuchfab Trockensieb für Papiermaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008131979A1 (fr) * 2007-04-27 2008-11-06 Voith Patent Gmbh Courroies de transfert

Also Published As

Publication number Publication date
US20070111011A1 (en) 2007-05-17
DE102005046902A1 (de) 2007-04-05
EP1770203A3 (fr) 2007-12-19
US7871497B2 (en) 2011-01-18

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