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EP1813715A1 - Conveyor belt - Google Patents

Conveyor belt Download PDF

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Publication number
EP1813715A1
EP1813715A1 EP06126078A EP06126078A EP1813715A1 EP 1813715 A1 EP1813715 A1 EP 1813715A1 EP 06126078 A EP06126078 A EP 06126078A EP 06126078 A EP06126078 A EP 06126078A EP 1813715 A1 EP1813715 A1 EP 1813715A1
Authority
EP
European Patent Office
Prior art keywords
conveyor belt
layers
web material
web
different
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Withdrawn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
EP06126078A
Other languages
German (de)
French (fr)
Inventor
Arved Westerkamp
Matthias Schmitt
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 EP1813715A1 publication Critical patent/EP1813715A1/en
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • 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
    • D21F3/0236—Belts or sleeves therefor manufacturing methods
    • 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

Definitions

  • the present invention relates to a conveyor belt as used, for example, in machines for producing web material, e.g. Paper or cardboard, can be used.
  • a conveyor belt as used, for example, in machines for producing web material, e.g. Paper or cardboard, can be used.
  • Such conveyor belts are used for example in the production of paper in areas in which the still moist paper material is passed through pressing areas to remove liquid contained in this material.
  • During the passage for example, by two pressure rollers formed between the conveyor belt and the web material, so the paper or the starting material for the paper, a thin liquid film through the water pressed out of this material.
  • the conveyor belt is impervious to water to provide as smooth a surface as possible and to produce a correspondingly unstructured image of that surface on the web material, where the conveyor belt is to be guided away from the web material there is the problem that the existing thin liquid or Water film creates a cling effect. This affects the detachment of the conveyor belt from the web material.
  • the object of the present invention is to provide a conveyor belt, in particular for machines for producing web material, e.g. Paper or board, can be produced with which high quality web material without the risk of unwanted sticking.
  • web material e.g. Paper or board
  • this object is achieved by a conveyor belt, in particular for machines for the production of web material, for.
  • a conveyor belt in particular for machines for the production of web material, for.
  • As paper or cardboard comprising at a web material contact side at least two superimposed material layers of different material, wherein the conveyor belt is at least partially treated material decreasing before the first commissioning on the web material contact side, such that the conveyor belt on the web material contact page a web material Contact surface, which is provided by different layers of material.
  • the web material contact surface is provided by various materials, namely those materials with which the material layers which are initially arranged one above the other and then partially removed or uncovered by material-removing treatment are constructed. This means that, although a uniform and with appropriate processing also smooth and thus provided substantially without Markierneson surface in contact with the web material occurs.
  • the conveyor belt according to the invention may, for example, have a belt core on which at least two layers of material are arranged one above the other on the web material contact side.
  • a belt core on which at least two layers of material are arranged one above the other on the web material contact side.
  • at least two surface regions of the web material contact surface can be provided by different materials or different material layers, which are not already part of the ribbon core.
  • the ribbon core can be constructed to optimally meet the demands placed on it, particularly in terms of durability and tensile strength, without having to worry about the ribbon core itself having to meet even special surface requirements.
  • the different layers can be formed by layers of different polymer material.
  • the different layers may differ in that they have a filler type which is different from one another and / or a mutually different filler fraction.
  • the different layers can further from films different thickness are formed.
  • At least one of the layers of material may have a thickness in the range of 5 to 50 ⁇ m. Furthermore, at least one of the material layers may comprise or be constructed of polyurethane material. In order to be able to influence the surface properties in a defined manner, it is proposed that at least one of the material layers contains filling material, preferably titanium dioxide, calcium carbonate, graphite, metal material, in particular aluminum or steel.
  • the web material contact surface may comprise, in a conveyor belt longitudinal direction, adjacent strip-like surface areas of the different material layers.
  • the measure b) may include the grinding of the conveyor belt blank at the web material contact side.
  • an inventive conveyor belt is generally designated 10.
  • the conveyor belt 10 comprises a belt core 12, which occupies a substantial volume range of the conveyor belt 10.
  • a reinforcement 14 is provided, which ensures above all the tensile strength of the conveyor belt 10.
  • This reinforcement 14 may comprise fiber material, for example also a fabric structure or the like.
  • the reinforcement 14 is embedded in elastic material 16 which can also provide the substantial volume area of the ribbon core 12.
  • the material 16 may be, for example, polyurethane material. It is of course also possible that the tape core 12 is constructed in multiple layers and is constructed, for example, on the coming into contact with the guide or drive element side with other material than at the web material contact page 18th
  • FIG. 1 It can be seen in FIG. 1 that three material layers 20, 22, 24 are provided on the web material contact side 18 of the band core 12.
  • the material layers 20, 22, 24 are formed as films and thus have a comparatively small thickness compared to the thickness of the ribbon core 12.
  • the proportions shown in Fig. 1 do not correspond to the actual circumstances. While the thickness of the ribbon core 12 is in the range of a few millimeters, the thickness of the material layers 20, 22, 24 is in the range of 5 to 50 microns.
  • the material layers 20, 22, 24 are laminated on the tape core 12 and also on each other and can be connected to each other, for example, by the use of adhesives or by the action of heat materially become.
  • the material layers 20, 22, 24 may in principle also be constructed of polyurethane material, may differ in terms of their structure material and thus also in terms of their properties, in particular surface properties, such as surface energy, by the introduction of filler. Titanium dioxide, calcium carbonate (CaCO 3 ), graphite and metal materials such as aluminum or steel, for example, are suitable as such filling material. These materials may, for example, be contained in particulate form in the material of the various material layers.
  • the conveyor belt blank thus produced is subjected to a material-reducing processing.
  • material is removed, for example, in a grinding process at the web material contact side, so that, for example, the web material contact surface 26, which can also be seen in FIG. 2, is produced with surface regions provided by different material layers 20, 22, 24. This results in a running in the conveyor belt longitudinal direction MD pattern of adjacent strips, each of the strips formed from one of the material layers 20, 22, 24.
  • the shape or orientation of the various surface areas of the web material contact surface 26 can be varied by appropriate processing of the conveyor belt blank. Also, different stripe patterns or different surface patterns can be generated in different areas of the conveyor belt. Also point- or island-like variations can be generated. Furthermore, it is possible to further influence the surface properties by the manner of the surface treatment.
  • the surface roughness or also the variation of the surface roughness on the web material contact surface can be influenced, for example, by the selection of the abrasive material or by the manner in which the grinding process is carried out.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Paper (AREA)
  • Structure Of Belt Conveyors (AREA)

Abstract

The transport belt (10) has a web material contact side (18) having at least two material layers (20,22,24) made of different materials and arranged one above the other. The material layers are exposed at a web material contact surface (26) in at least two regions of the transport belt on the web material contact side. A belt core (12) is provided on the web material contact side on which the material layers are arranged one above the other. An independent claim is included for the transport belt manufacture method.

Description

Die vorliegende Erfindung betrifft ein Transportband, wie es beispielsweise in Maschinen zur Herstellung von Bahnmaterial, z.B. Papier oder Karton, eingesetzt werden kann.The present invention relates to a conveyor belt as used, for example, in machines for producing web material, e.g. Paper or cardboard, can be used.

Derartige Transportbänder werden beispielsweise bei der Herstellung von Papier in Bereichen eingesetzt, in welchen das noch feuchte Papiermaterial durch Pressbereiche hindurchgeführt wird, um in diesem Material noch enthaltene Flüssigkeit zu entfernen. Beim Durchlauf beispielsweise durch zwei Presswalzen bildet sich zwischen dem Transportband und dem Bahnmaterial, also dem Papier bzw. dem Ausgangsmaterial für das Papier, ein dünner Flüssigkeitsfilm durch das aus diesem Material herausgepresste Wasser. Da im Allgemeinen das Transportband zum Bereitstellen einer möglichst glatten Oberfläche und zum Erzeugen eines entsprechend unstrukturierten Abbildes dieser Oberfläche auf dem Bahnmaterial wasserundurchlässig ist, besteht dort, wo das Transportband von dem Bahnmaterial weggeführt werden soll, das Problem, dass der vorhandene dünne Flüssigkeits- bzw. Wasserfilm einen Anhafteffekt erzeugt. Dieser beeinträchtigt das Ablösen des Transportbands von dem Bahnmaterial.Such conveyor belts are used for example in the production of paper in areas in which the still moist paper material is passed through pressing areas to remove liquid contained in this material. During the passage, for example, by two pressure rollers formed between the conveyor belt and the web material, so the paper or the starting material for the paper, a thin liquid film through the water pressed out of this material. In general, since the conveyor belt is impervious to water to provide as smooth a surface as possible and to produce a correspondingly unstructured image of that surface on the web material, where the conveyor belt is to be guided away from the web material there is the problem that the existing thin liquid or Water film creates a cling effect. This affects the detachment of the conveyor belt from the web material.

Um diesem Problem entgegenzutreten, ist es aus der US 6,962,885 B1 bekannt, an derjenigen Seite des Transportbandes, die in Kontakt mit dem Bahnmaterial kommt, eine dünne Schicht vorzusehen, die keine plane bzw. glatte Oberflächenstruktur aufweist, sondern die eine Vielzahl kleiner Einsenkungen bereitstellt. Diese können beispielsweise dadurch gebildet werden, dass beim Herstellen dieser dünnen Schicht Salzkörner in das Material eingebettet werden. Dort wo die Salzkörner nicht vollständig eingebettet sind, können sie nachträglich durch Auflösen in Wasser entfernt werden, um auf diese Art und Weise die zur Oberfläche dann offenen Hohlräume bzw. Einsenkungen zu erhalten. In diesen Einsenkungen kann das aus dem Bahnmaterial heraus gepresste Wasser angesammelt werden und es kann der Anhafteffekt zumindest abgeschwächt werden.To counter this problem, it is from the US 6,962,885 B1 It is known to provide a thin layer on the side of the conveyor belt which comes into contact with the web material, which does not have a plane or smooth surface structure, but instead provides a multiplicity of small depressions. These can be formed, for example, by embedding salt grains in the material during the production of this thin layer. Where the salt grains are not completely embedded are, they can be removed later by dissolving in water, in order to obtain in this way the surface then open cavities or depressions. In these depressions, the water pressed out of the web material can be accumulated and at least the adhesion effect can be weakened.

Aus der EP 0 576 115 B1 ist es bekannt, die Oberfläche des Transportbandes, die in Kontakt mit dem Bahnmaterial kommt, vergleichsweise rauh zu gestalten, gleichzeitig jedoch diesen Bereich des Transportbandes auch aus elastischem Material zu bilden. Beim Pressen zwischen zwei Presswalzen wird die vergleichsweise rauhe Oberfläche komprimiert. Nach dem Durchlauf durch diesen Presswalzenbereich entspannt sich das komprimierte Transportband mit der Folge, dass die die Oberflächenrauhigkeit generierenden zackenartigen Erhebungen eine Störung in dem vorhandenen Wasserfilm erzeugen und somit das Lösen des Transportbands vom Bahnmaterial erleichtert wird.From the EP 0 576 115 B1 It is known to make the surface of the conveyor belt, which comes in contact with the web material, comparatively rough, but at the same time to form this region of the conveyor belt also made of elastic material. When pressing between two press rollers, the comparatively rough surface is compressed. After passing through this press roll area, the compressed conveyor belt relaxes with the result that the serrated ridges generating the surface roughness create a disturbance in the existing water film and thus facilitate the release of the conveyor belt from the web material.

Die Aufgabe der vorliegenden Erfindung ist es, ein Transportband, insbesondere für Maschinen zur Herstellung von Bahnmaterial, z.B. Papier oder Karton, bereitzustellen, mit welchem Bahnmaterial hoher Qualität ohne die Gefahr eines ungewünschten Anhaftens erzeugt werden kann.The object of the present invention is to provide a conveyor belt, in particular for machines for producing web material, e.g. Paper or board, can be produced with which high quality web material without the risk of unwanted sticking.

Erfindungsgemäß wird diese Aufgabe gelöst durch ein Transportband, insbesondere für Maschinen zur Herstellung von Bahnmaterial, z. B. Papier oder Karton, umfassend an einer Bahnmaterial-Kontaktseite wenigstens zwei übereinander angeordnete Materiallagen unterschiedlichen Materials, wobei das Transportband vor der ersten Inbetriebnahme an der Bahnmaterial-Kontaktseite wenigstens bereichsweise materialabnehmend behandelt wird, derart, dass das Transportband an der Bahnmaterial-Kontaktseite eine Bahnmaterial-Kontaktoberfläche aufweist, die durch verschiedene Materiallagen bereitgestellt ist.According to the invention, this object is achieved by a conveyor belt, in particular for machines for the production of web material, for. As paper or cardboard comprising at a web material contact side at least two superimposed material layers of different material, wherein the conveyor belt is at least partially treated material decreasing before the first commissioning on the web material contact side, such that the conveyor belt on the web material contact page a web material Contact surface, which is provided by different layers of material.

Bei dem erfindungsgemäßen Transportband ist die Bahnmaterial-Kontaktoberfläche durch verschiedene Materialien bereitgestellt, nämlich diejenigen Materialien, mit welchen die zunächst übereinander angeordneten und dann teilweise durch materialabnehmende Behandlung abgetragenen bzw. freigelegten Materiallagen aufgebaut sind. Dies bedeutet, dass zwar eine einheitliche und bei entsprechender Bearbeitung auch glatte und somit im Wesentlichen ohne Markierneigung bereitgestellte Oberfläche in Kontakt mit dem Bahnmaterial tritt. Gleichwohl hat sich gezeigt, dass durch das Ausgestalten der Bahnmaterial-Kontaktoberfläche aus verschiedenen Oberflächenbereichen mit entsprechend verschiedenen Oberflächeneigenschaften das Loslösen des Transportbandes von dem Bahnmaterial beispielsweise nach dem Durchlaufen eines Pressnips im Vergleich zu aus einheitlichem Material aufgebauten Bahnmaterial-Kontaktoberflächen deutlich erleichtert wird.In the conveyor belt according to the invention, the web material contact surface is provided by various materials, namely those materials with which the material layers which are initially arranged one above the other and then partially removed or uncovered by material-removing treatment are constructed. This means that, although a uniform and with appropriate processing also smooth and thus provided substantially without Markierneigung surface in contact with the web material occurs. However, it has been found that by forming the web material contact surface from different surface areas with correspondingly different surface properties, the disengagement of the conveyor belt from the web material, for example after passing through a press nip, is significantly facilitated as compared to web material contact surfaces constructed from unitary material.

Das erfindungsgemäße Transportband kann beispielsweise einen Bandkern aufweisen, an dem an der Bahnmaterial-Kontaktseite wenigstens zwei Materiallagen übereinander angeordnet sind. Dies hat zur Folge, dass wenigstens zwei Oberflächenbereiche der Bahnmaterial-Kontaktoberfäche durch unterschiedliche Materialien bzw. unterschiedliche Materiallagen bereitgestellt werden können, die nicht auch bereits Teil des Bandkerns sind. Die Folge davon ist, dass der Bandkern so aufgebaut werden kann, dass er die an ihn gestellten Forderungen, insbesondere hinsichtlich Haltbarkeit und Zugfestigkeit, in optimaler Art und Weise erfüllt, ohne darauf achten zu müssen, dass der Bandkern selbst auch spezielle Oberflächenanforderungen erfüllen muss.The conveyor belt according to the invention may, for example, have a belt core on which at least two layers of material are arranged one above the other on the web material contact side. As a result, at least two surface regions of the web material contact surface can be provided by different materials or different material layers, which are not already part of the ribbon core. The consequence of this is that the ribbon core can be constructed to optimally meet the demands placed on it, particularly in terms of durability and tensile strength, without having to worry about the ribbon core itself having to meet even special surface requirements.

Die unterschiedlichen Lagen können hierbei durch Lagen aus unterschiedlichem Polymermaterial gebildet werden. Dazu alternativ oder zusätzlich können sich die unterschiedlichen Lagen dadurch unterscheiden, dass diese eine zueinander unterschiedliche Füllstoffart und / oder einen zueinander unterschiedlichen Füllstoffanteil haben.
Die unterschiedlichen Lagen können des weiteren aus Folien unterschiedlicher Dicke gebildet werden.The different layers can be formed by layers of different polymer material. As an alternative or in addition, the different layers may differ in that they have a filler type which is different from one another and / or a mutually different filler fraction.
The different layers can further from films different thickness are formed.

Wenigstens eine der Materiallagen kann eine Dicke im Bereich von 5 bis 50 µm aufweisen. Ferner kann wenigstens eine der Materiallagen Polyurethanmaterial umfassen bzw. damit aufgebaut sein. Um die Oberflächeneigenschaften definiert beeinflussen zu können, wird vorgeschlagen, dass wenigstens eine der Materiallagen Füllmaterial, vorzugsweise Titandioxid, Calciumcarbonat, Graphit, Metallmaterial, insbesondere Aluminium oder Stahl, enthält.At least one of the layers of material may have a thickness in the range of 5 to 50 μm. Furthermore, at least one of the material layers may comprise or be constructed of polyurethane material. In order to be able to influence the surface properties in a defined manner, it is proposed that at least one of the material layers contains filling material, preferably titanium dioxide, calcium carbonate, graphite, metal material, in particular aluminum or steel.

Die Bahnmaterial-Kontaktoberfläche kann in einer Transportband-Längsrichtung sich nebeneinander erstreckende, streifenartige Oberflächenbereiche der unterschiedlichen Materiallagen umfassen.The web material contact surface may comprise, in a conveyor belt longitudinal direction, adjacent strip-like surface areas of the different material layers.

Die vorliegende Erfindung betrifft ferner ein Verfahren zur Herstellung eines Transportbandes, insbesondere für Maschinen zur Herstellung von Bahnmaterial, z. B. Papier oder Karton, insbesondere eines insbesondere eines erfindungsgemäßen Transportbandes, umfassend die Maßnahmen:

  1. a) Bereitstellen eines Transportband-Rohlings der an einer Bahnmaterial-Kontaktseite wenigstens zwei Materiallagen aus unterschiedlichen Materialien aufweist,
  2. b) Bearbeiten einer Oberfläche des Transportband-Rohlings an der Bahnmaterial-Kontaktseite derart, dass eine aus Bereichen der unterschiedlichen Materiallagen gebildete Bahnmaterial-Kontaktoberfläche bereitgestellt wird.
The present invention further relates to a method for producing a conveyor belt, in particular for machines for producing web material, for. As paper or cardboard, especially one in particular a conveyor belt according to the invention, comprising the measures:
  1. a) providing a conveyor belt blank which has at least two layers of material made of different materials on a web material contact side,
  2. b) machining a surface of the conveyor belt blank at the web material contact side so as to provide a web material contact surface formed of regions of the different material layers.

Dabei kann die Maßnahme b) das Abschleifen des Transportband-Rohlings an der Bahnmaterial-Kontaktseite umfassen.The measure b) may include the grinding of the conveyor belt blank at the web material contact side.

Die vorliegende Erfindung wird nachfolgend mit Bezug auf die beiliegenden Zeichnungen detailliert beschrieben. Es zeigt:

Fig. 1
eine Teil-Schnittdarstellung eines erfindungsgemäß aufgebauten Transportbandes;
Fig. 2
eine Draufsicht auf das Transportband der Fig. 1 in Blickrichtung 11.
The present invention will be described below in detail with reference to the accompanying drawings. It shows:
Fig. 1
a partial sectional view of a conveyor belt constructed according to the invention;
Fig. 2
a plan view of the conveyor belt of Fig. 1 in the viewing direction 11th

In Fig. 1 ist ein erfindungsgemäßes Transportband allgemein mit 10 bezeichnet. Das Transportband 10 umfasst einen Bandkern 12, der einen wesentlichen Volumenbereich des Transportbandes 10 einnimmt. Im Bandkern 12 ist beispielsweise näherungsweise zentral in Dickenrichtung eine Verstärkung 14 vorgesehen, die vor allem die Zugfestigkeit des Transportbandes 10 sicherstellt. Diese Verstärkung 14 kann Fasermaterial, beispielsweise auch eine Gewebestruktur oder dergleichen, umfassen. Die Verstärkung 14 ist in elastisches Material 16 eingebettet, welches auch den wesentlichen Volumenbereich des Bandkerns 12 bereitstellen kann. Das Material 16 kann beispielsweise Polyurethanmaterial sein. Auch ist es selbstverständlich möglich, dass der Bandkern 12 mehrlagig aufgebaut ist und beispielsweise an der in Kontakt mit Führungs- oder Antriebselement tretenden Seite mit anderem Material aufgebaut ist, als an der Bahnmaterial-Kontaktseite 18.In Fig. 1, an inventive conveyor belt is generally designated 10. The conveyor belt 10 comprises a belt core 12, which occupies a substantial volume range of the conveyor belt 10. In the band core 12, for example, approximately centrally in the thickness direction, a reinforcement 14 is provided, which ensures above all the tensile strength of the conveyor belt 10. This reinforcement 14 may comprise fiber material, for example also a fabric structure or the like. The reinforcement 14 is embedded in elastic material 16 which can also provide the substantial volume area of the ribbon core 12. The material 16 may be, for example, polyurethane material. It is of course also possible that the tape core 12 is constructed in multiple layers and is constructed, for example, on the coming into contact with the guide or drive element side with other material than at the web material contact page 18th

Man erkennt in Fig. 1, dass an der Bahnmaterial-Kontaktseite 18 des Bandkerns 12 drei Materiallagen 20, 22, 24 vorgesehen sind. Die Materiallagen 20, 22, 24 sind als Folien ausgebildet und weisen somit im Vergleich zur Dicke des Bandkerns 12 eine vergleichsweise geringe Dicke auf. Die in Fig. 1 dargestellten Proportionen entsprechen dabei nicht den tatsächlichen Gegebenheiten. Während die Dicke des Bandkerns 12 im Bereich von einigen Millimetern liegt, liegt die Dicke der Materiallagen 20, 22, 24 im Bereich von 5 bis 50 µm. Die Materiallagen 20, 22, 24 sind auf den Bandkern 12 und auch aufeinander laminiert und können beispielsweise durch Einsatz von Klebstoffen oder durch Wärmeeinwirkung materialschlüssig miteinander verbunden werden.It can be seen in FIG. 1 that three material layers 20, 22, 24 are provided on the web material contact side 18 of the band core 12. The material layers 20, 22, 24 are formed as films and thus have a comparatively small thickness compared to the thickness of the ribbon core 12. The proportions shown in Fig. 1 do not correspond to the actual circumstances. While the thickness of the ribbon core 12 is in the range of a few millimeters, the thickness of the material layers 20, 22, 24 is in the range of 5 to 50 microns. The material layers 20, 22, 24 are laminated on the tape core 12 and also on each other and can be connected to each other, for example, by the use of adhesives or by the action of heat materially become.

Die Materiallagen 20, 22, 24 können grundsätzlich ebenfalls aus Polyurethanmaterial aufgebaut sein, können sich hinsichtlich ihres Aufbaumaterials und somit auch hinsichtlich ihrer Eigenschaften, insbesondere Oberflächeneigenschaften, wie z.B. Oberflächenenergie, durch das Einbringen von Füllmaterial unterscheiden. Als derartiges Füllmaterial kommt beispielsweise Titandioxid, Calciumcarbonat (CaCO3), Graphit sowie Metallmaterialien, wie z.B. Aluminium oder Stahl, in Frage. Diese Materialien können beispielsweise in Partikelform in dem Material der verschiedenen Materiallagen enthalten sein.The material layers 20, 22, 24 may in principle also be constructed of polyurethane material, may differ in terms of their structure material and thus also in terms of their properties, in particular surface properties, such as surface energy, by the introduction of filler. Titanium dioxide, calcium carbonate (CaCO 3 ), graphite and metal materials such as aluminum or steel, for example, are suitable as such filling material. These materials may, for example, be contained in particulate form in the material of the various material layers.

Nachdem die Materiallagen 20, 22, 24 auf den Bandkern 12 aufgebracht worden sind, und noch bevor das Transportband 10 beispielsweise bei einer Papierfertigungsmaschine zum Einsatz gebracht wird, wird der so hergestellte Transportband-Rohling einer materialabnehmenden Bearbeitung unterzogen. Dabei wird an der Bahnmaterial-Kontaktseite Material beispielsweise in einem Schleifverfahren abgetragen, so dass beispielsweise die auch in Fig. 2 erkennbare Bahnmaterial-Kontaktoberfläche 26 mit durch verschiedene der Materiallagen 20, 22, 24 bereitgestellten Oberflächenbereichen erzeugt wird. Es ergibt sich hier also ein in der Transportband-Längsrichtung MD verlaufendes Muster nebeneinander liegender Streifen, jeder der Streifen gebildet aus einer der Materiallagen 20, 22, 24. Dies hat zur Folge, dass insbesondere dann, wenn die verschiedenen Materiallagen 20, 22, 24 aus verschiedenen Aufbaumaterialien bzw. aus Aufbaumaterialien mit sich unterscheidenden Oberflächeneigenschaften aufgebaut werden, über die Bahnmaterial-Kontaktoberfläche 26 hinweg eine Variation der Oberflächeneigenschaften, insbesondere der Oberflächenenergie, vorhanden ist. Dies führt dazu, dass dort, wo das Transportband 10 von dem darauf transportierten Bahnmaterial weg geführt wird, auch ein zwischen dem Transportband 10 und dem Bahnmaterial generierter dünner Wasserfilm das Loslösen deutlich weniger beeinträchtigt, als dies der Fall ist, wenn eine einheitliche bzw. aus einem Material aufgebaute Bahnmaterial-Kontaktoberfläche vorgesehen ist. Gleichwohl wird durch die die verschiedenen Bereiche der Bahnmaterial-Kontaktoberfläche 26 bereitstellenden Materiallagen 20, 22, 24 eine sehr glatte, im Wesentlichen unstrukturierte Oberfläche bereitgestellt, die die Gefahr der Erzeugung von Markierungen im gefertigten Bahnmaterial entsprechend mindert.After the layers of material 20, 22, 24 have been applied to the tape core 12, and even before the conveyor belt 10 is used, for example, in a paper making machine, the conveyor belt blank thus produced is subjected to a material-reducing processing. In this case, material is removed, for example, in a grinding process at the web material contact side, so that, for example, the web material contact surface 26, which can also be seen in FIG. 2, is produced with surface regions provided by different material layers 20, 22, 24. This results in a running in the conveyor belt longitudinal direction MD pattern of adjacent strips, each of the strips formed from one of the material layers 20, 22, 24. This has the consequence that, in particular, when the different material layers 20, 22, 24 are built up from different construction materials or from construction materials with differing surface properties, over the web material contact surface 26 there is a variation of the surface properties, in particular of the surface energy. As a result, where the conveyor belt 10 is guided away from the sheet material carried thereon, even a thin film of water generated between the conveyor belt 10 and the sheet material significantly lessens detachment than it does when it does uniform or constructed of a material web material contact surface is provided. However, the layers of material 20, 22, 24 providing the various regions of the web material contact surface 26 provide a very smooth, substantially unstructured surface which correspondingly reduces the risk of creating marks in the manufactured web material.

Die Formgebung bzw. die Orientierung der verschiedenen Oberflächenbereiche der Bahnmaterial-Kontaktoberfläche 26 kann durch entsprechende Bearbeitung des Transportband-Rohlings variiert werden. Auch können in verschiedenen Bereichen des Transportbandes verschiedene Streifenmuster bzw. verschiedene Oberflächenmuster generiert werden. Auch punkt- bzw. inselartige Variationen können erzeugt werden. Ferner ist es möglich, durch die Art und Weise der Oberflächenbehandlung die Oberflächeneigenschaften weiter zu beeinflussen. Die Oberflächenrauhigkeit oder auch die Variation der Oberflächenrauhigkeit an der Bahnmaterial-Kontaktoberfläche kann beispielsweise durch die Auswahl des Schleifmaterials bzw. durch die Art und Weise, in welcher der Schleifvorgang durchgeführt wird, beeinflusst werden.The shape or orientation of the various surface areas of the web material contact surface 26 can be varied by appropriate processing of the conveyor belt blank. Also, different stripe patterns or different surface patterns can be generated in different areas of the conveyor belt. Also point- or island-like variations can be generated. Furthermore, it is possible to further influence the surface properties by the manner of the surface treatment. The surface roughness or also the variation of the surface roughness on the web material contact surface can be influenced, for example, by the selection of the abrasive material or by the manner in which the grinding process is carried out.

Claims (8)

Transportband, insbesondere für Maschinen zur Herstellung von Bahnmaterial, z. B. Papier oder Karton, umfassend an einer Bahnmaterial-Kontaktseite (18) wenigstens zwei übereinander angeordnete Materiallagen (20, 22, 24) unterschiedlichen Materials, wobei das Transportband (10) vor der ersten Inbetriebnahme an der Bahnmaterial-Kontaktseite (18) wenigstens bereichsweise materialabnehmend behandelt wird, derart, dass das Transportband (10) an der Bahnmaterial-Kontaktseite (18) eine Bahnmaterial-Kontaktoberfläche (26) aufweist, die durch verschiedene Materiallagen (20, 22, 24) bereitgestellt ist.Conveyor belt, in particular for machines for the production of web material, z. B. paper or cardboard comprising at a web material contact side (18) at least two superimposed material layers (20, 22, 24) of different material, wherein the conveyor belt (10) before the first startup at the web material contact side (18) at least partially material handling, such that the conveyor belt (10) has a sheet material contacting surface (26) on the sheet material contacting face (18) provided by different layers of material (20, 22, 24). Transportband nach Anspruch 1,
gekennzeichnet durch einen Bandkern, wobei an dem Bandkern an der Bahnmaterial-Kontaktseite (18) wenigstens zwei Materiallagen (20, 22, 24) übereinander angeodnet sind.Conveyor belt according to claim 1,
characterized by a ribbon core, wherein on the ribbon core at the web material contact side (18) at least two layers of material (20, 22, 24) are arranged one above the other. Transportband nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass wenigstens eine der Materiallagen (20, 22, 24) eine Dicke im Bereich von 5 bis 50 µm aufweist.Conveyor belt according to claim 1 or 2,
characterized in that at least one of the layers of material (20, 22, 24) has a thickness in the range of 5 to 50 microns. Transportband nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass wenigstens eine der Materiallagen (20, 22, 24) Polyurethanmaterial umfasst.Conveyor belt according to one of claims 1 to 3,
characterized in that at least one of the material layers (20, 22, 24) comprises polyurethane material. Transportband nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, dass wenigstens eine der Materiallagen (20, 22, 24) Füllmaterial, vorzugsweise Titandioxid, Calciumcarbonat, Graphit, Metallmaterial, insbesondere Aluminium oder Stahl, enthält.Conveyor belt according to one of claims 1 to 4,
characterized in that at least one of the layers of material (20, 22, 24) comprises filling material, preferably titanium dioxide, calcium carbonate, Graphite, metal material, in particular aluminum or steel. Transportband nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dass die Bahnmaterial-Kontaktoberfläche (26) in einer Transportband-Längsrichtung (MD) sich nebeneinander erstreckende, streifenartige Oberflächenbereiche der unterschiedlichen Materiallagen (20, 22, 24) umfasst.Conveyor belt according to one of claims 1 to 5,
characterized in that the web material contact surface (26) in a conveyor belt longitudinal direction (MD) adjacent to each other, strip-like surface areas of the different material layers (20, 22, 24). Verfahren zur Herstellung eines Transportbandes, insbesondere für Maschinen zur Herstellung von Bahnmaterial, z. B. Papier oder Karton, insbesondere eines Transportbandes nach einem der vorhergehenden Ansprüche, umfassend die Maßnahmen: a) Bereitstellen eines Transportband-Rohlings der an einer Bahnmaterial-Kontaktseite (18) wenigstens zwei Materiallagen (20, 22, 24) aus unterschiedlichen Materialien aufweist, b) Bearbeiten einer Oberfläche des Transportband-Rohlings an der Bahnmaterial-Kontaktseite (18) derart, dass eine aus Bereichen der unterschiedlichen Materiallagen (20, 22, 24) gebildete Bahnmaterial-Kontaktoberfläche (26) bereitgestellt wird. Method for producing a conveyor belt, in particular for machines for producing web material, eg. As paper or cardboard, in particular a conveyor belt according to one of the preceding claims, comprising the measures: a) providing a conveyor belt blank which has at least two layers of material (20, 22, 24) of different materials on a web material contact side (18), b) machining a surface of the conveyor belt blank at the web material contact side (18) such that a web material contact surface (26) formed of regions of the different material layers (20, 22, 24) is provided. Verfahren nach Anspruch 7,
dadurch gekennzeichnet, dass die Maßnahme b) das Abschleifen des Transportband-Rohlings an der Bahnmaterial-Kontaktseite umfasst.Method according to claim 7,
characterized in that the measure b) comprises the grinding of the conveyor belt blank at the web material contact side.
EP06126078A 2006-01-26 2006-12-14 Conveyor belt Withdrawn EP1813715A1 (en)

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US7419050B2 (en) 2008-09-02
DE102006003705A1 (en) 2007-08-02

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