WO2007085324A1 - Conveyor belt with non-stick coating - Google Patents

Conveyor belt with non-stick coating Download PDF

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Publication number
WO2007085324A1
WO2007085324A1 PCT/EP2006/069472 EP2006069472W WO2007085324A1 WO 2007085324 A1 WO2007085324 A1 WO 2007085324A1 EP 2006069472 W EP2006069472 W EP 2006069472W WO 2007085324 A1 WO2007085324 A1 WO 2007085324A1
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WO
WIPO (PCT)
Prior art keywords
rubber
conveyor belt
stick coating
cover plate
carrying
Prior art date
Application number
PCT/EP2006/069472
Other languages
German (de)
French (fr)
Inventor
Wolfgang Kerwel
Original Assignee
Contitech Transportbandsysteme 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 Contitech Transportbandsysteme Gmbh filed Critical Contitech Transportbandsysteme Gmbh
Publication of WO2007085324A1 publication Critical patent/WO2007085324A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/30—Belts or like endless load-carriers
    • B65G15/32—Belts or like endless load-carriers made of rubber or plastics
    • B65G15/34—Belts or like endless load-carriers made of rubber or plastics with reinforcing layers, e.g. of fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/042—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/14—Layered products comprising a layer of natural or synthetic rubber comprising synthetic rubber copolymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/16—Layered products comprising a layer of natural or synthetic rubber comprising polydienes homopolymers or poly-halodienes homopolymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B32B2260/023—Two or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/048—Natural or synthetic rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2433/00—Closed loop articles
    • B32B2433/02—Conveyor belts

Definitions

  • the invention relates to a conveyor belt, comprising at least one reinforcing layer made of rubberized fabric or rubberized cords, a support-side rubber cover plate and a non-stick coating of ultra-high molecular weight polyethylene (UHMW-PE) on the supporting surface.
  • UHMW-PE ultra-high molecular weight polyethylene
  • Such conveyor belts are known, for example, from WO 02/094692 A1.
  • a film of ultra-high molecular weight polyethylene is applied.
  • the conveyor belts according to WO 02/094692 A1 are characterized by a practicable, durable and durable non-stick coating. The life of such straps is extended.
  • load-bearing rubber cover layer is based on oil-resistant nitrile rubber or chloroprene rubber, sufficient adhesion between non-stick coating of ultra-high molecular weight polyethylene and load-bearing rubber cover layer can not be achieved. It comes to the separation of the layers.
  • the invention is therefore based on the object to provide a conveyor belt, which shows a high flame retardancy, sufficient temperature resistance, high oil and grease resistance and reduced contamination of the bearing surface.
  • This object is achieved according to the invention in that the support-side rubber cover plate based on nitrile rubber or chloroprene rubber and between the On the rubber side cover plate and the non-stick coating a rubber layer based on styrene-butadiene rubber is arranged as a bonding layer.
  • the basic idea of the invention resides in the fact that the layers of ultrahigh molecular weight polyethylene and rubber plates of nitrile or chloroprene rubber, which are normally not adhered, are bonded via a layer of a further rubber mixture based on styrene-butadiene rubber.
  • a layer of a further rubber mixture based on styrene-butadiene rubber In this way it is possible to combine the good properties of nitrile and chloroprene rubber in terms of temperature and oil resistance with the properties of a provided with an anti-adhesive layer conveyor belt. Materials do not stick to the belt surface, the cleaning effort is reduced and you can time consuming, expensive and the life of the belt shortening belt scraper, z. B. carbide, dispense.
  • the conveyor belt according to the invention additionally has good flame retardancy.
  • the service life of the straps is further increased by reducing the wear on the bearing surface, even with a reduction in the existing rubber cover plate thickness.
  • the conveyor belts according to the invention can, for. B. for the promotion of oil or fat products, eg. B. in grain handling ports, are used advantageously.
  • One possible area of use is, for example, the promotion of soybean meal in soybean oil production.
  • the adhesion-promoting rubber layer based on styrene-butadiene rubber (SBR) preferably has a thickness of 0.3 to 1.0 mm to a sufficient
  • the support-side rubber cover plate is preferably based on nitrile rubber.
  • the conveyor belt according to the invention has one or more reinforcement layers of rubberized fabric or rubberized cords.
  • the straps according to the invention can withstand a more stringent flame retardancy test, in which wear-resistant and possibly present running rubber cover layers are removed, the gumming of the fabric or of the cords is preferably based on styrene-butadiene rubber.
  • the gumming is therefore composed of a rubber mixture containing at least styrene-butadiene rubber. Other types of rubber and conventional additives are present or may be present.
  • the conveyor belt can on the running side have a fabric guide, the
  • the conveyor belt has a running-side rubber cover plate based on nitrile or chloroprene rubber. For technical reasons, it makes sense if the support and running side cover plates are based on the same rubber.
  • the conveyor belt has lateral solid rubber edges, so that the reinforcement layer is covered laterally.
  • These solid rubber edges are made for ease of manufacture of the conveyor belt, preferably of a rubber mixture based on the same type of rubber as the running and supporting side rubber cover plates.
  • the non-stick coating of the conveyor belt preferably has a thickness of min. 0.2 mm, so that a good anti-adhesive effect and a high abrasion resistance are ensured.
  • the non-stick coating has a thickness of 0.2 to 0.3 mm, in order not to adversely affect the elasticity and trough capacity of the belt with good anti-adhesive effect.
  • the conveyor belt according to the invention can be produced by methods known to the person skilled in the art, as described, for example, in WO 02/094692 A1. First the fabric or cord layers are gummed (calendered) with the help of calenders with a rubber mixture. Then, a belt blank is produced from the un-vulcanized layers of rubberized fabric or corduroy and, if present, running side cover plate mixtures. On the support-side unvulcanized mixture for the cover plate, a film made of UHMW-PE or a powder made of UHMW-PE and the composite is vulcanized continuously or discontinuously, wherein the film or the powder of UHMW-PE forms the non-stick coating and firmly adhering to the connecting side cover plate is connected.
  • FIG. 1 shows schematically a section of a conveyor belt according to the invention in a section perpendicular to the running direction.
  • the conveyor belt shown in Fig. 1 has three reinforcement layers Ia, Ib and Ic of rubberized polyester-polyamide blended fabric.
  • the rubber coating is based on styrene-butadiene rubber.
  • the rubberized reinforcement layers Ia, Ib and Ic are surrounded by a support-side rubber cover plate 2, a running side rubber cover plate 3 and a lateral solid rubber edge 4.
  • the supporting and running side cover plates 2 and 3 and the lateral solid rubber edge 4 are all made of the same rubber mixture based on nitrile rubber.
  • On the support-side cover plate 2 is a
  • Rubber layer 5 based on styrene-butadiene rubber, which acts as a bonding layer between the support-side rubber cover plate 2 and the outwardly facing non-stick coating 6 made of UHMW-PE.
  • the conveyor belt according to FIG. 1 was tested with regard to its properties; in doing so it showed a high oil and grease resistance, a particularly high flame retardancy and a sufficient temperature resistance. Carrying on the belt, even sticky or oily material could be easily and completely removed due to the non-stick coating. There were no signs of detachment between the carrier side cover layer 2 and non-stick coating 6. In a conveyor belt similar structure, but without the rubber layer acting as a bonding layer 5, no adhesion between the support side cover plate 2 and non-stick coating 6 could be achieved, thus no anti-adhesive layer remained on the conveyor belt and transported goods remained stuck. The residues could only be removed with elaborate and expensive wiper systems, which also strongly attacked the belt mechanically and shortened the service life of the belt.

Abstract

The invention relates to a conveyor belt, having at least one strength carrier layer made from rubberized woven fabric or rubberized cords (1a, 1b, 1c), a carrying-side rubber covering plate (2) and a non-stick coating (6) made from ultra-high molecular weight polyethylene (UHMW-PE) on the carrying-side surface. For high flame retardance, sufficient temperature stability, high oil and grease stability and reduced soiling of the carrying-side surface, the carrying-side rubber covering plate (2) is based on nitrile rubber or chloroprene rubber, and a rubber layer (5) on the basis of styrene-butadiene rubber is arranged as adhesion bridge between the carrying-side rubber covering plate (2) and the non-stick coating (6).

Description

ContiTech Transportbandsysteme GmbH 206-014-PWO.l/FoContiTech Transportbandsysteme GmbH 206-014-PWO.l / Fo
08.12.2006 Beschreibung08.12.2006 Description
Fördergurt mit AntihaftbeschichtungConveyor belt with non-stick coating
Die Erfindung betrifft einen Fördergurt, aufweisend zumindest eine Festigkeitsträgerlage aus gummiertem Gewebe oder gummierten Corden, eine tragseitige Gummideckplatte und eine Antihaftbeschichtung aus ultrahochmolekularem Polyethylen (UHMW-PE) auf der tragseitigen Oberfläche.The invention relates to a conveyor belt, comprising at least one reinforcing layer made of rubberized fabric or rubberized cords, a support-side rubber cover plate and a non-stick coating of ultra-high molecular weight polyethylene (UHMW-PE) on the supporting surface.
Derartige Fördergurte sind beispielsweise aus der WO 02/094692 Al bekannt. Auf die Kautschukmischung für die tragseitige Gummideckplatte wird bei diesen Gurten im Verlauf der Herstellung eine Folie aus ultrahochmolekularem Polyethylen aufgelegt. Basiert die tragseitige Gummideckplatte auf Naturkautschuk oder Styrol-Butadien-Such conveyor belts are known, for example, from WO 02/094692 A1. On the rubber compound for the support-side rubber cover plate in these belts in the course of production, a film of ultra-high molecular weight polyethylene is applied. Is the load-bearing rubber cover plate based on natural rubber or styrene-butadiene
Kautschuk so verbindet sich die Folie fest haftend mit der tragseitigen Gummideckplatte. Die Fördergurte gemäß WO 02/094692 Al, zeichnen sich durch ein praxistaugliche, strapazierfähige und dauerhafte Antihaftbeschichtung aus. Die Lebensdauer solche Gurte ist verlängert. Es hat sich aber herausgestellt, dass bei Fördergurten, deren tragseitige Gummideckschicht auf ölbeständigem Nitrilkautschuk oder Chloroprenkautschuk basiert, keine ausreichende Haftung zwischen Antihaftbeschichtung aus ultrahochmolekularem Polyethylen und tragseitiger Gummidecklage erzielt werden kann. Es kommt zur Trennung der Lagen.Rubber so the film connects firmly adhering to the supporting side rubber cover plate. The conveyor belts according to WO 02/094692 A1, are characterized by a practicable, durable and durable non-stick coating. The life of such straps is extended. However, it has been found that in conveyor belts whose load-bearing rubber cover layer is based on oil-resistant nitrile rubber or chloroprene rubber, sufficient adhesion between non-stick coating of ultra-high molecular weight polyethylene and load-bearing rubber cover layer can not be achieved. It comes to the separation of the layers.
Der Erfindung liegt daher die Aufgabe zugrunde, einen Fördergurt bereit zu stellen, der eine hohe Flammwidrigkeit, ausreichende Temperaturbeständigkeit, hohe Öl- und Fettbeständigkeit und ein reduziertes Verschmutzen der tragseitigen Oberfläche zeigt.The invention is therefore based on the object to provide a conveyor belt, which shows a high flame retardancy, sufficient temperature resistance, high oil and grease resistance and reduced contamination of the bearing surface.
Gelöst wird diese Aufgabe erfindungsgemäß dadurch, dass die tragseitige Gummideckplatte auf Nitrilkautschuk oder Chloroprenkautschuk basiert und zwischen der tragseitigen Gummideckplatte und der Antihaftbeschichtung eine Gummischicht auf der Basis von Styrol-Butadien-Kautschuk als Haftbrücke angeordnet ist.This object is achieved according to the invention in that the support-side rubber cover plate based on nitrile rubber or chloroprene rubber and between the On the rubber side cover plate and the non-stick coating a rubber layer based on styrene-butadiene rubber is arranged as a bonding layer.
Der Grundgedanke der Erfindung ist darin zu sehen, dass die normalerweise nicht miteinander zu Haftung zu bringenden Schichten aus ultrahochmolekularem Polyethylen und Gummiplatten aus Nitril- oder Chloroprenkautschuk über eine Schicht aus einer weiteren Kautschukmischung auf der Basis von Styrol-Butadien-Kautschuk zur Haftung gebracht werden. Auf diese Weise gelingt es, die guten Eigenschaften von Nitril- und Chloroprenkautschuk hinsichtlich der Temperatur- und Ölbeständigkeit mit den Eigenschaften eines mit einer Antihaftschicht versehenen Fördergurtes zu verbinden. Materialien bleiben nicht an der Gurtoberfläche kleben, der Reinigungsaufwand ist reduziert und man kann auf aufwändige, teure und die Lebensdauer des Gurtes verkürzende Gurtabstreifer, z. B. aus Hartmetall, verzichten.The basic idea of the invention resides in the fact that the layers of ultrahigh molecular weight polyethylene and rubber plates of nitrile or chloroprene rubber, which are normally not adhered, are bonded via a layer of a further rubber mixture based on styrene-butadiene rubber. In this way it is possible to combine the good properties of nitrile and chloroprene rubber in terms of temperature and oil resistance with the properties of a provided with an anti-adhesive layer conveyor belt. Materials do not stick to the belt surface, the cleaning effort is reduced and you can time consuming, expensive and the life of the belt shortening belt scraper, z. B. carbide, dispense.
Der erfindungsgemäße Fördergurt weist zusätzlich eine gute Flammwidrigkeit auf. Die Standzeit der Gurte ist durch die Reduzierung des Verschleißes an der tragseitigen Oberfläche zusätzlich erhöht, selbst bei Reduzierung der bisherigen Gummideckplattendicke .The conveyor belt according to the invention additionally has good flame retardancy. The service life of the straps is further increased by reducing the wear on the bearing surface, even with a reduction in the existing rubber cover plate thickness.
Die erfindungsgemäßen Fördergurte können z. B. zur Förderung von öl- oder fetthaltigen Produkten, z. B. in Getreideumschlaghäfen, vorteilhaft eingesetzt werden. Ein mögliches Einsatzgebiet ist beispielsweise die Förderung von Sojaschrot bei der Sojaölgewinnung.The conveyor belts according to the invention can, for. B. for the promotion of oil or fat products, eg. B. in grain handling ports, are used advantageously. One possible area of use is, for example, the promotion of soybean meal in soybean oil production.
Die als Haftbrücke wirkende Gummischicht auf der Basis von Styrol-Butadien-Kautschuk (SBR) weist vorzugsweise eine Dicke von 0,3 bis 1,0 mm auf, um eine ausreichendeThe adhesion-promoting rubber layer based on styrene-butadiene rubber (SBR) preferably has a thickness of 0.3 to 1.0 mm to a sufficient
Verbindung zwischen Antihaftbeschichtung und Gummidecklage zu gewährleisten und die Muldungsfähigkeit des Gurtes nicht zu beeinflussen.To ensure connection between non-stick coating and rubber cover layer and not to influence the trough capacity of the belt.
Um einen Fördergurt mit besonders guter Öl- und Fettbeständigkeit zu erhalten, basiert die tragseitige Gummideckplatte bevorzugt auf Nitrilkautschuk. Der erfindungsgemäße Fördergurt weist eine oder mehrere Festigkeitsträgerlagen aus gummiertem Gewebe oder gummierten Corden auf. Damit die erfindungsgemäßen Gurte auch einer verschärften Flammwidrigkeitsprüfung, bei der trag- und ggf. vorliegenden laufseitigen Gummidecklagen entfernt werden, standhalten, basiert die Gummierung des Gewebes oder der Corde vorzugsweise auf Styrol-Butadien-Kautschuk. Die Gummierung setzt sich demnach aus einer Kautschukmischung zusammen, die zumindest Styrol- Butadien-Kautschuk enthält. Weitere Kautschuktypen und übliche Zusatzschlagstoffe sind vorhanden oder können vorhanden sein.In order to obtain a conveyor belt with particularly good oil and grease resistance, the support-side rubber cover plate is preferably based on nitrile rubber. The conveyor belt according to the invention has one or more reinforcement layers of rubberized fabric or rubberized cords. In order that the straps according to the invention can withstand a more stringent flame retardancy test, in which wear-resistant and possibly present running rubber cover layers are removed, the gumming of the fabric or of the cords is preferably based on styrene-butadiene rubber. The gumming is therefore composed of a rubber mixture containing at least styrene-butadiene rubber. Other types of rubber and conventional additives are present or may be present.
Der Fördergurt kann laufseitig eine Gewebegleitlage aufweisen, die dieThe conveyor belt can on the running side have a fabric guide, the
Festigkeitsträgerlagen abdeckt. Gemäß einer vorteilhaften Weiterbildung der Erfindung weist der Fördergurt jedoch eine laufseitige Gummideckplatte auf der Basis von Nitril- oder Chloroprenkautschuk auf. Aus produktionstechnischen Gründen ist es sinnvoll, wenn die trag- und laufseitigen Deckplatten auf demselben Kautschuk basieren.Reinforcing layers covers. According to an advantageous development of the invention, however, the conveyor belt has a running-side rubber cover plate based on nitrile or chloroprene rubber. For technical reasons, it makes sense if the support and running side cover plates are based on the same rubber.
Um die Festigkeitsträgerlagen seitlich zu schützen, hat es sich als positiv erwiesen, wenn der Fördergurt seitliche Vollgummikanten aufweist, so dass die Festigkeitsträgerlage seitlich abgedeckt ist. Diese Vollgummikanten bestehen für einfache Herstellbarkeit des Fördergurtes vorzugsweise aus einer Kautschukmischung, die auf dem gleichen Kautschuktyp basiert, wie die lauf- und tragseitigen Gummideckplatten.To protect the reinforcement layers laterally, it has proven to be positive if the conveyor belt has lateral solid rubber edges, so that the reinforcement layer is covered laterally. These solid rubber edges are made for ease of manufacture of the conveyor belt, preferably of a rubber mixture based on the same type of rubber as the running and supporting side rubber cover plates.
Die Antihaftbeschichtung des Fördergurtes weist bevorzugt eine Dicke von min. 0,2 mm auf, so dass eine gute Antihaftwirkung und eine hohe Abriebfestigkeit gewährleistet werden.The non-stick coating of the conveyor belt preferably has a thickness of min. 0.2 mm, so that a good anti-adhesive effect and a high abrasion resistance are ensured.
Gemäß einer vorteilhaften Weiterbildung der Erfindung weist die Antihaftbeschichtung eine Dicke von 0,2 bis 0,3 mm auf, um die die Elastizität und Muldungsfähigkeit des Gurtes bei guter Antihaftwirkung nicht negativ zu beeinflussen.According to an advantageous embodiment of the invention, the non-stick coating has a thickness of 0.2 to 0.3 mm, in order not to adversely affect the elasticity and trough capacity of the belt with good anti-adhesive effect.
Der erfindungsgemäße Fördergurt kann nach dem Fachmann bekannten Verfahren, wie sie beispielsweise in der WO 02/094692 Al beschrieben sind, hergestellt werden. Zunächst werden die Gewebe- oder Cordlagen mit Hilfe von Kalandern mit einer Kautschukmischung gummiert (geskimmt). Dann wird aus den un vulkanisierten Lagen aus gummiertem Gewebe oder Cord und trag- und ggf. vorhandenen laufseitigen Deckplattenmischungen ein Gurtrohling erzeugt. Auf die tragseitige unvulkanisierte Mischung für die Deckplatte wird eine Folie aus UHMW-PE oder ein Pulver aus UHMW- PE auf gebracht und der Verbund kontinuierlich oder diskontinuierlich vulkanisiert, wobei die Folie oder das Pulver aus UHMW-PE die Antihaftbeschichtung bildet und fest haftend mit der tragseitigen Deckplatte verbunden wird.The conveyor belt according to the invention can be produced by methods known to the person skilled in the art, as described, for example, in WO 02/094692 A1. First the fabric or cord layers are gummed (calendered) with the help of calenders with a rubber mixture. Then, a belt blank is produced from the un-vulcanized layers of rubberized fabric or corduroy and, if present, running side cover plate mixtures. On the support-side unvulcanized mixture for the cover plate, a film made of UHMW-PE or a powder made of UHMW-PE and the composite is vulcanized continuously or discontinuously, wherein the film or the powder of UHMW-PE forms the non-stick coating and firmly adhering to the connecting side cover plate is connected.
Anhand eines Ausführungsbeispiels, das in der einzigen Zeichnungsfigur Fig. 1 dargestellt ist, soll die Erfindung näher erläutert werden. Dabei zeigt Fig. 1 schematisch einen Ausschnitt eines erfindungsgemäßen Fördergurtes im Schnitt senkrecht zur Laufrichtung.Reference to an embodiment, which is shown in the single drawing figure Fig. 1, the invention will be explained in more detail. 1 shows schematically a section of a conveyor belt according to the invention in a section perpendicular to the running direction.
Der in Fig. 1 dargestellte Fördergurt weist drei Festigkeitsträgerlagen Ia, Ib und Ic aus gummiertem Polyester-Polyamid-Mischgewebe auf. Die Gummierung basiert auf Styrol- Butadien-Kautschuk. Die gummierten Festigkeitsträgerlagen Ia, Ib und Ic sind von einer tragseitigen Gummideckplatte 2, einer laufseitigen Gummideckplatte 3 und einer seitlichen Vollgummikante 4 umgeben. Die trag- und laufseitigen Deckplatten 2 und 3 sowie die seitliche Vollgummikante 4 bestehen allesamt aus derselben Kautschukmischung auf der Basis von Nitrilkautschuk. Auf der tragseitigen Deckplatte 2 befindet sich eineThe conveyor belt shown in Fig. 1 has three reinforcement layers Ia, Ib and Ic of rubberized polyester-polyamide blended fabric. The rubber coating is based on styrene-butadiene rubber. The rubberized reinforcement layers Ia, Ib and Ic are surrounded by a support-side rubber cover plate 2, a running side rubber cover plate 3 and a lateral solid rubber edge 4. The supporting and running side cover plates 2 and 3 and the lateral solid rubber edge 4 are all made of the same rubber mixture based on nitrile rubber. On the support-side cover plate 2 is a
Gummischicht 5 auf der Basis von Styrol-Butadien-Kautschuk, die als Haftbrücke zwischen der tragseitigen Gummideckplatte 2 und der nach außen weisenden Antihaftbeschichtung 6 aus UHMW-PE wirkt.Rubber layer 5 based on styrene-butadiene rubber, which acts as a bonding layer between the support-side rubber cover plate 2 and the outwardly facing non-stick coating 6 made of UHMW-PE.
Der Fördergurt gemäß Figur 1 wurde hinsichtlich seiner Eigenschaften überprüft, dabei zeigte er eine hohe Öl- und Fettbeständigkeit, eine besonders hohe Flammwidrigkeit und eine ausreichende Temperaturbeständigkeit. Auf dem Gurt transportiertes, auch klebriges oder öliges Material ließ sich auf Grund der Antihaftbeschichtung problemlos und vollständig entfernen. Dabei zeigten sich keine Ablöseerscheinungen zwischen tragseitiger Decklage 2 und Antihaftbeschichtung 6. Bei einem Fördergurt ähnlichen Aufbaus, allerdings ohne die als Haftbrücke wirkende Gummischicht 5, konnte keine Haftung zwischen tragseitiger Deckplatte 2 und Antihaftbeschichtung 6 erzielt werden, somit verblieb keine Antihaftschicht auf dem Fördergurt und transportiertes Gut blieb haften. Die Rückstände ließen sich nur mit aufwändigen und teuren Abstreifersysteme entfernen, die außerdem noch den Gurt stark mechanisch angriffen und die Standzeit des Gurtes verkürzten. The conveyor belt according to FIG. 1 was tested with regard to its properties; in doing so it showed a high oil and grease resistance, a particularly high flame retardancy and a sufficient temperature resistance. Carrying on the belt, even sticky or oily material could be easily and completely removed due to the non-stick coating. There were no signs of detachment between the carrier side cover layer 2 and non-stick coating 6. In a conveyor belt similar structure, but without the rubber layer acting as a bonding layer 5, no adhesion between the support side cover plate 2 and non-stick coating 6 could be achieved, thus no anti-adhesive layer remained on the conveyor belt and transported goods remained stuck. The residues could only be removed with elaborate and expensive wiper systems, which also strongly attacked the belt mechanically and shortened the service life of the belt.

Claims

Patentansprüche claims
1. Fördergurt, aufweisend zumindest eine Festigkeitsträgerlage aus gummiertem Gewebe oder Corden (Ia, Ib, Ic), eine tragseitige Gummideckplatte (2) und eine Antihaftbeschichtung (6) aus ultrahochmolekularem Polyethylen (UHMW-PE) auf der tragseitigen Oberfläche, dadurch gekennzeichnet, dass die tragseitige Gummideckplatte (2) auf Nitrilkautschuk oder Chloroprenkautschuk basiert und zwischen der tragseitigen Gummideckplatte (2) und der Antihaftbeschichtung (6) eine Gummischicht (5) auf der Basis von Styrol-Butadien-Kautschuk als Haftbrücke angeordnet ist.A conveyor belt, comprising at least one reinforcing layer made of rubberized fabric or cords (Ia, Ib, Ic), a support-side rubber cover plate (2) and a non-stick coating (6) of ultra-high molecular weight polyethylene (UHMW-PE) on the supporting surface, characterized in that the supporting-side rubber cover plate (2) is based on nitrile rubber or chloroprene rubber and a rubber layer (5) based on styrene-butadiene rubber is arranged as a bonding layer between the support-side rubber cover plate (2) and the non-stick coating (6).
2. Fördergurt nach Anspruch 1, dadurch gekennzeichnet, dass die Gummischicht (5) auf der Basis von Styrol-Butadien-Kautschuk eine Dicke von 0,3 bis 1,0 mm aufweist.2. Conveyor belt according to claim 1, characterized in that the rubber layer (5) on the basis of styrene-butadiene rubber has a thickness of 0.3 to 1.0 mm.
3. Fördergurt nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die tragseitige Gummideckplatte (2) auf Nitrilkautschuk basiert.3. Conveyor belt according to claim 1 or 2, characterized in that the support-side rubber cover plate (2) based on nitrile rubber.
4. Fördergurt nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Gummierung des Gewebes oder der Corde der Festigkeitsträgerlage (Ia, Ib, Ic) auf Styrol-Butadien-Kautschuk basieren.4. Conveyor belt according to at least one of the preceding claims, characterized in that the rubber coating of the fabric or the cords of the reinforcement layer (Ia, Ib, Ic) are based on styrene-butadiene rubber.
5. Fördergurt nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass er eine laufseitige Gummideckplatte (3) auf der Basis von Nitrilkautschuk oder Chloroprenkautschuk aufweist.5. Conveyor belt according to at least one of the preceding claims, characterized in that it comprises a running side rubber cover plate (3) on the basis of nitrile rubber or chloroprene rubber.
6. Fördergurt nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass er seitliche Vollgummikanten (4) aufweist, so dass die Festigkeitsträgerlage (Ia, Ib, Ic) seitlich abgedeckt ist. 6. Conveyor belt according to at least one of the preceding claims, characterized in that it has lateral solid rubber edges (4), so that the reinforcement layer (Ia, Ib, Ic) is covered laterally.
7. Fördergurt nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Antihaftbeschichtung (6) eine Dicke von min. 0,2 mm aufweist.7. Conveyor belt according to at least one of the preceding claims, characterized in that the non-stick coating (6) has a thickness of min. 0.2 mm.
8. Fördergurt nach Anspruch 7, dadurch gekennzeichnet, dass die Antihaftbeschichtung (6) eine Dicke von 0,2 bis 0,3 mm aufweist 8. Conveyor belt according to claim 7, characterized in that the non-stick coating (6) has a thickness of 0.2 to 0.3 mm
PCT/EP2006/069472 2006-01-27 2006-12-08 Conveyor belt with non-stick coating WO2007085324A1 (en)

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DE102006003912.2A DE102006003912B4 (en) 2006-01-27 2006-01-27 Conveyor belt with non-stick coating
DE102006003912.2 2006-01-27

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CN107380893B (en) * 2017-09-01 2019-05-21 闫镇达 Ultra high molecular weight polyethylene fiber fabric core/polyureas coating conveyer belt and preparation method thereof
DE102017121303A1 (en) 2017-09-14 2019-03-14 Arntz Beteiligungs Gmbh & Co. Kg Rubberised textile material for a belt layer, associated rubber compound and belt

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US3650874A (en) * 1968-03-15 1972-03-21 Pneumatiques Caoutchouc Mfg Adhering rubbers and polyolefines by other than peroxide curing agents
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