EP2090695B1 - Method for producing a scour-proof overlay - Google Patents

Method for producing a scour-proof overlay Download PDF

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Publication number
EP2090695B1
EP2090695B1 EP09001209A EP09001209A EP2090695B1 EP 2090695 B1 EP2090695 B1 EP 2090695B1 EP 09001209 A EP09001209 A EP 09001209A EP 09001209 A EP09001209 A EP 09001209A EP 2090695 B1 EP2090695 B1 EP 2090695B1
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EP
European Patent Office
Prior art keywords
paper web
wet
metering
application
resin
Prior art date
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EP09001209A
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German (de)
French (fr)
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EP2090695A1 (en
Inventor
Dr. Reinhard Kreuder
Klaus Fischer
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Dekor-Kunststoffe GmbH
Dekor Kunststoffe GmbH
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Dekor-Kunststoffe GmbH
Dekor Kunststoffe GmbH
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Application filed by Dekor-Kunststoffe GmbH, Dekor Kunststoffe GmbH filed Critical Dekor-Kunststoffe GmbH
Priority to PL09001209T priority Critical patent/PL2090695T3/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/385—Oxides, hydroxides or carbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B44C5/0469—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper
    • B44C5/0476—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper with abrasion resistant properties
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/18—Paper- or board-based structures for surface covering
    • D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
    • D21H27/26—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures

Definitions

  • the invention relates to a method for producing a scrub-resistant overlay, in particular for laminates.
  • overlay papers are used whose purpose is to produce a highly transparent and at the same time very hard-wearing surface on the actual decorative layer.
  • Durability has hitherto been understood as meaning high chemical resistance and water resistance of the surface, and also the ability to counteract mechanical wear and, above all, to prevent damage to the decorative layer.
  • a method directed thereto discloses, for example, the EP 0 875 399 A2 ,
  • the former is achieved through the use of melamine-formaldehyde resins, which provide a compact resistant surface by compression and resin condensation.
  • the mechanical resistance is enhanced by the incorporation of hard particles such as e.g. Corundum granules secured in the resin matrix.
  • the surface of the finished laminate is produced by molding the pressure plate surface in the compression. To prevent damage to the press plate by corundum in the overlay during the pressing process, this is covered by a pulp layer.
  • Such overlays are mainly produced by the liquid overlay method in which the amount of corundum (hereinafter referred to as coarse corundum) necessary for achieving the abrasion-resistant properties is obtained by rinsing and metering a resin coarse corundum dispersion onto an overlay base paper ,
  • the prior art is a method in which an overlay base paper, usually with a basis weight of 25-35 g / m 2 , is unwound from a roll. On this paper web, a resin solution is then applied on one side by means of a scoop roller in the first step, so that the cellulose fibers of the paper can be filled with the resin solution and as much air as possible is replaced with resin from the fiber capillaries.
  • the paper is guided by deflection rollers over a longer "breathing distance", in which the paper web swells due to the moisture absorption, then the web is passed through a second resin pan, is received in the further resin in the paper structure.
  • the paper web now saturated with resin solution, is passed between two metering rolls which form a gap of defined width and thus control the application weight of the resin solution on the paper web.
  • a resin coarse corundum dispersion is applied to the already resin-impregnated paper web on one side, the application weight of which is then determined and adjusted by means of a further nip.
  • the paper web thus treated and provided with coarse corundum on one side was dried to a defined residual moisture content in a drying tunnel designed as a floating dryer.
  • the overlay in addition to its function as a transparent and abrasion-resistant cover layer in the laminate floor, obtains further surface properties (eg abrasion resistance of the surface), it is provided according to the methods hitherto known from the prior art that an appropriate additive is added "in bulk" becomes. This means, that the complete amount of resin must undergo a modification as part of the core impregnation.
  • an additive which is intended to exert its effect only on the surface must be used in large quantities in the core resin for effect development, with the result that this leads to a considerable increase in the cost of the overlay to be produced.
  • the paper web fed to the drying device is provided in its partly dried state with an additional top-side application in such a way that the partially dried web gets an additional top-side application via a coating unit in the middle of the drying device present in the form of a drying channel.
  • the application unit can be, for example, an anilox roller or a squeegee device.
  • the application of the latter method on the anilox roller is usually at the expense of production speed. It has also been shown that the anilox roller application is only possible with an already partially dried web and a wet-on-wet application can not be accomplished by this method.
  • the present invention therefore has for its object to provide a method in which by another unilateral wet-on-wet application step additives on the surface can be applied, which give the overlay more important properties.
  • any other resin additive dispersion can be applied to achieve a certain effect in the surface.
  • the wet-on-wet application and metering of the resin additive dispersion is achieved by passing the resin additive dispersion under sufficient pressure into the nip between doctor blades and applying it to the paper web.
  • the dosage of the introduced dispersion takes place via a rotating squeegee, which can be designed as a plain or wire squeegee and which can rotate both counter-rotating or the same direction.
  • the metered amount depends on the doctor blade surface, the direction of rotation and the speed.
  • a uniform concern of the paper web and thus a uniform application of the resin additive dispersion are achieved by a slight pressing of the paper web on the doctor, which is controlled by the strength of the wrap of the applicator.
  • a doctor blade on which the method according to the invention is based, it is ensured that small application quantities of a coating composition can be applied uniformly on one side wet-on-wet.
  • a great advantage of the invention is the fact that the entire drying device is available for efficient paper web drying.
  • the wet-on-wet application also ensures that there are no interfaces between the already applied resin and the new application layer can arise as they can occur when applied to a partially dried resin surface.
  • FIG. 1 schematically illustrated method 100 is used for the production of resin-impregnated papers, which should also be equipped with certain functionalities.
  • the method 100 is used in particular for producing abrasion-resistant overlays of laminate floors.
  • the method 100 begins with the processing of a so-called overlay base paper from a role, not shown here.
  • the paper web 10 is then pressed by the rollers 11 on the Anfeuchtwalze 12, which from the first resin pan 13 which applies the impregnating agent 14 in the form of a resin to the paper web 10 on one side.
  • the single-sided coated paper web 10 is then guided by means of the guide rollers 17 and can swell in this time by moisture and resin absorption in the fiber structure of the paper.
  • the thus impregnated paper web 10 is guided in a further process step over the guide rollers 25 to a spray nozzle over which a resin coarse corundum dispersion 27 is rinsed in excess to the paper web 10.
  • the desired application weight of the resin-corundum dispersion is then adjusted across the gap width between the metering rollers 26.
  • a coating composition 29 in the form of a fine corundum dispersion is applied as described above after application and dosing of the coarse corundum dispersion on the opposite paper side and metered via the doctor blade 32 (see also US Pat FIG. 2 ).
  • the coated paper web 10 is dried and adjusted in the residual moisture so that a well processable overlay is obtained.
  • the present invention is not limited in its embodiment to the above-mentioned, preferred embodiments. Rather, a number of variants are conceivable, which make use of the illustrated solution even with fundamentally different types of execution.
  • the doctor blades 31, 32 can have different configurations.
  • other metering devices can be used as pairs of rollers.
  • the method is not limited to the production of abrasion-resistant overlays with a top-side additive coat. Rather, the method can also be used for the production of non-abrasion-resistant overlays or other resin-impregnated papers, which should also be equipped with functionalities.

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  • Application Of Or Painting With Fluid Materials (AREA)
  • Paper (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Laminated Bodies (AREA)
  • Saccharide Compounds (AREA)

Abstract

The method for producing abrasion-resistant overlays for laminates, comprises rolling an overlay-based paper of a roll for receipt of a paper web (10), one-sided dampening the paper web with an impregnating agent (14), impregnating the paper web in the core and metering the application of an impregnating agent, one-sided wet-in-wet applying a rough corundum-resin dispersion (27) on the paper web and metering, mutually wet-in-wet applying a coating mass (29) on the paper web, metering the applied coating mass by a metering unit through blades on the desired weight, and drying the paper web. The method for producing abrasion-resistant overlays for laminates, comprises rolling an overlay-based paper of a roll for receipt of a paper web (10), one-sided dampening the paper web with an impregnating agent (14), impregnating the paper web in the core and metering the application of an impregnating agent, one-sided wet-in-wet applying a rough corundum-resin dispersion (27) on the paper web and metering, mutually wet-in-wet applying a coating mass (29) on the paper web, metering the applied coating mass by a metering unit through blades on the desired weight, and drying the paper web using an entire drying channel length and -capacity. After impregnation of the paper web, a one-sided washing of the paper web takes place via the resin-rough corundum dispersion. The application of the coating mass takes place in form of resin-additive application. The coating mass is guided between the two blades. The lower surface of the paper web is brought towards the blades and is removed by the blades. The coating mass is applied in a uniformly distributed manner and is supplied by an inlet gate of the paper web. An independent claim is included for an impregnation device for producing overlays for laminates.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines scheuerfesten Overlays, insbesondere für Laminate.The invention relates to a method for producing a scrub-resistant overlay, in particular for laminates.

Im Bereich der Herstellung von Fußbodenlaminaten finden Overlaypapiere Verwendung, deren Zweck es ist, auf der eigentlichen Dekorlage eine hochtransparente und zugleich sehr strapazierfähige Oberfläche zu erzeugen. Unter Strapazierfähigkeit wurde bislang eine hohe chemische Resistenz und Wasserfestigkeit der Oberfläche verstanden, ferner die Fähigkeit, mechanischer Abnutzung entgegenzuwirken und damit vor allem die Beschädigung der Dekorlage zu verhindern. Ein hierauf gerichtetes Verfahren offenbart beispielsweise die EP 0 875 399 A2 .In the field of the production of floor laminates, overlay papers are used whose purpose is to produce a highly transparent and at the same time very hard-wearing surface on the actual decorative layer. Durability has hitherto been understood as meaning high chemical resistance and water resistance of the surface, and also the ability to counteract mechanical wear and, above all, to prevent damage to the decorative layer. A method directed thereto discloses, for example, the EP 0 875 399 A2 ,

Ersteres wird durch die Verwendung von Melamin-Formaldehydharzen erreicht, die durch Verpressung und Harzkondensation eine kompakte resistente Oberfläche ergeben. Die mechanische Widerstands-fähigkeit wird durch das Einbringen von Hartpartikeln wie z.B. Korundkörnchen in die Harzmatrix sichergestellt.The former is achieved through the use of melamine-formaldehyde resins, which provide a compact resistant surface by compression and resin condensation. The mechanical resistance is enhanced by the incorporation of hard particles such as e.g. Corundum granules secured in the resin matrix.

Die Oberfläche des fertigen Laminats wird durch Abformung der Pressblechoberfläche in der Verpressung erzeugt. Um eine Beschädigung des Pressbleches durch Korund im Overlay während des Pressvorgangs zu verhindern, wird dieser durch eine Zellstofflage abgedeckt.The surface of the finished laminate is produced by molding the pressure plate surface in the compression. To prevent damage to the press plate by corundum in the overlay during the pressing process, this is covered by a pulp layer.

Derartige Overlays werden heute hauptsächlich nach dem Flüssig-Overlay-Verfahren produziert, bei dem die zur Erreichung der abriebfesten Eigenschaften notwendige Menge an Korund (im Folgenden immer Grobkorund genannt) durch Anspülen und Dosieren einer Harz-Grobkorund-Dispersion an ein Overlay-Basispapier erhalten wird.Today, such overlays are mainly produced by the liquid overlay method in which the amount of corundum (hereinafter referred to as coarse corundum) necessary for achieving the abrasion-resistant properties is obtained by rinsing and metering a resin coarse corundum dispersion onto an overlay base paper ,

Stand der Technik ist ein Verfahren, bei dem ein Overlay-Basispapier, meist mit einem Flächengewicht von 25 - 35 g/m2, von einer Rolle abgewickelt wird. An diese Papierbahn wird dann im ersten Schritt einseitig eine Harzlösung mittels einer Schöpfwalze angetragen, so dass sich die Zellulosefasern des Papiers mit der Harzlösung füllen können und möglichst viel Luft aus den Faserkapillaren mit Harz ersetzt wird.The prior art is a method in which an overlay base paper, usually with a basis weight of 25-35 g / m 2 , is unwound from a roll. On this paper web, a resin solution is then applied on one side by means of a scoop roller in the first step, so that the cellulose fibers of the paper can be filled with the resin solution and as much air as possible is replaced with resin from the fiber capillaries.

Anschließend wird das Papier mittels Umlenkwalzen über eine längere "Atemstrecke" geführt, in der die Papierbahn durch die Feuchtigkeitsaufnahme quillt, dann wird die Bahn durch eine zweite Harzwanne geführt, in der weiteres Harz in die Papierstruktur aufgenommen wird.Subsequently, the paper is guided by deflection rollers over a longer "breathing distance", in which the paper web swells due to the moisture absorption, then the web is passed through a second resin pan, is received in the further resin in the paper structure.

Nach dieser sogenannten Imprägnierung der Papierbahn im Kern wird die nun mit Harzlösung gesättigte Papierbahn zwischen zwei Dosierwalzen hindurchgeführt, die einen Spalt mit definierter Breite bilden und damit das Auftragsgewicht der Harzlösung auf der Papierbahn steuern.After this so-called impregnation of the paper web in the core, the paper web, now saturated with resin solution, is passed between two metering rolls which form a gap of defined width and thus control the application weight of the resin solution on the paper web.

Im nächsten Verfahrensschritt wird an die bereits harzdurchtränkte Papierbahn einseitig eine Harz-Grobkorund-Dispersion angetragen, wobei deren Auftragsgewicht dann durch einen weiteren Walzenspalt bestimmt und eingestellt wird.In the next process step, a resin coarse corundum dispersion is applied to the already resin-impregnated paper web on one side, the application weight of which is then determined and adjusted by means of a further nip.

Nach dem bisher bekannten Verfahren wurde die so beharzte und einseitig mit Grobkorund versehene Papierbahn in einem als Schwebetrockner ausgebildeten Trockenkanal auf eine definierte Restfeuchte getrocknet.According to the previously known method, the paper web thus treated and provided with coarse corundum on one side was dried to a defined residual moisture content in a drying tunnel designed as a floating dryer.

Soll das Overlay neben seiner Funktion als transparente und abriebfeste Deckschicht im Laminatfußboden weitere Oberflächeneneigenschaften (z. B. Scheuerfestigkeit der Oberfläche) erhalten, so ist nach den bisher aus dem Stand der Technik bekannten Verfahren vorgesehen, dass ein entsprechender Zusatzstoff "in der Masse" zugegeben wird. Dies bedeutet, dass die komplette Harzmenge im Rahmen der Kemimprägnierung eine Modifikation erfahren muss. Hierdurch ergibt sich jedoch der Nachteil, dass ein Additiv, welches seine Wirkung nur an der Oberfläche entfalten soll, in großen Mengen im Kernharz zur Wirkungsentfaltung eingesetzt werden muss, mit der Folge, dass dies zu einer nicht geringen Verteuerung des herzustellenden Overlays führt.If the overlay, in addition to its function as a transparent and abrasion-resistant cover layer in the laminate floor, obtains further surface properties (eg abrasion resistance of the surface), it is provided according to the methods hitherto known from the prior art that an appropriate additive is added "in bulk" becomes. This means, that the complete amount of resin must undergo a modification as part of the core impregnation. However, this has the disadvantage that an additive which is intended to exert its effect only on the surface must be used in large quantities in the core resin for effect development, with the result that this leads to a considerable increase in the cost of the overlay to be produced.

Alternativ wird bei den bisher bekannten Verfahren die der Trocknungsvorrichtung zugeführte Papierbahn in ihrem teilgetrockneten Zustand mit einem zusätzlichen oberseitigen Auftrag versehen und zwar dergestalt, dass die teilgetrocknete Bahn in der Mitte der in Gestalt eines Trockenkanals vorliegenden Trockenvorrichtung einen zusätzlichen oberseitigen Auftrag über einen Auftragsaggregat bekommt. Bei dem Auftragsaggregat kann es sich bspw. um eine Rasterwalze oder eine Rakelvorrichtung handeln. Die Auftragung nach dem letztgenannten Verfahren über die Rasterwalze geht jedoch meist zulasten der Produktionsgeschwindigkeit. Es hat sich zudem gezeigt, dass der Rasterwalzenauftrag erst bei einer bereits teilweise getrockneten Bahn möglich ist und sich ein Nass-in-nass-Auftrag nach diesem Verfahren nicht bewerkstelligen lässt.Alternatively, in the previously known methods, the paper web fed to the drying device is provided in its partly dried state with an additional top-side application in such a way that the partially dried web gets an additional top-side application via a coating unit in the middle of the drying device present in the form of a drying channel. The application unit can be, for example, an anilox roller or a squeegee device. The application of the latter method on the anilox roller is usually at the expense of production speed. It has also been shown that the anilox roller application is only possible with an already partially dried web and a wet-on-wet application can not be accomplished by this method.

Ausgehend von den dargelegten Nachteilen sowie unter Würdigung des aufgezeigten Standes der Technik bei Verfahren der eingangs genannten Art liegt der vorliegenden Erfindung daher die Aufgabe zugrunde, ein Verfahren zu schaffen, in dem durch einen weiteren einseitigen Nass-in-nass-Auftragungsschritt Additive auf der Oberfläche aufgebracht werden können, die dem Overlay weitere wichtige Eigenschaften verleihen.Based on the disadvantages presented and in appreciation of the cited prior art method of the type mentioned above, the present invention therefore has for its object to provide a method in which by another unilateral wet-on-wet application step additives on the surface can be applied, which give the overlay more important properties.

Diese Aufgabe löst die Erfindung durch ein Verfahren gemäß Patentanspruch 1.This object is achieved by the invention by a method according to claim 1.

Vorteilhafte Ausgestaltungen der Erfindung manifestieren sich in den Unteransprüchen.Advantageous embodiments of the invention manifest themselves in the subclaims.

Gemäß der Erfindung erfolgt - beispielsweise nach der Imprägnierung der Papierbahn und einseitigem Auftrag der Harz-Grobkorund-Dispersion - ein Nass-in-Nass-Auftrag einer Harz-Feinkorund-Dispersion und Dosierung desselben auf der Gegenseite der Papierbahn. An Stelle der Harz-Feinkorund-Dispersion kann auch jede andere Harz-Additiv-Dispersion aufgetragen werden, um einen bestimmten Effekt in der Oberfläche zu erreichen.According to the invention takes place - for example after the impregnation of the paper web and one-sided application of the resin coarse corundum dispersion - a wet-on-wet application of a resin fine corundum dispersion and dosage thereof on the opposite side of the paper web. In place of the resin fine corundum dispersion, any other resin additive dispersion can be applied to achieve a certain effect in the surface.

Der Nass-in-nass-Auftragung und Dosierung der Harz-Additiv-Dispersion wird dadurch erreicht, dass die Harz-Additiv-Dispersion mit ausreichendem Druck in den Spalt zwischen Rakeln geführt und an die Papierbahn angetragen. Die Dosierung der angetragenen Dispersion erfolgt über eine sich drehende Rakel, die als Glatt- oder Drahtrakel ausgebildet sein kann und die sowohl gegen- oder gleichläufig rotieren kann. Die dosierte Menge hängt von der Rakeloberfläche, der Rotationsrichtung und - geschwindigkeit ab.The wet-on-wet application and metering of the resin additive dispersion is achieved by passing the resin additive dispersion under sufficient pressure into the nip between doctor blades and applying it to the paper web. The dosage of the introduced dispersion takes place via a rotating squeegee, which can be designed as a plain or wire squeegee and which can rotate both counter-rotating or the same direction. The metered amount depends on the doctor blade surface, the direction of rotation and the speed.

Ein gleichmäßiges Anliegen der Papierbahn und damit eine gleichmäßiger Auftrag der Harz-Additive-Dispersion werden durch ein leichtes Anpressen der Papierbahn auf die Rakel erreicht, was durch die Stärke der Umschlingung der Auftragseinrichtung gesteuert wird.A uniform concern of the paper web and thus a uniform application of the resin additive dispersion are achieved by a slight pressing of the paper web on the doctor, which is controlled by the strength of the wrap of the applicator.

Durch die dem erfindungsgemäßen Verfahren zugrunde liegende Dosiermethode mittels einer Rakel ist sichergestellt, dass geringe Auftragsmengen einer Beschichtungsmasse nass-in-nass einseitig gleichmäßig aufgetragen werden können. Zudem ist ein großer Vorteil der Erfindung darin zu sehen, dass die gesamte Trocknungsvorrichtung für eine effiziente Papierbahnentrocknung zur Verfügung steht.By means of a doctor blade on which the method according to the invention is based, it is ensured that small application quantities of a coating composition can be applied uniformly on one side wet-on-wet. In addition, a great advantage of the invention is the fact that the entire drying device is available for efficient paper web drying.

Der Nass-in-nass-Auftragung stellt zudem sicher, dass zwischen dem bereits aufgetragenen Harz und der neuen Auftragsschicht keine Grenzflächen entstehen können, wie sie beim Auftragen auf eine partiell getrocknete Harzoberfläche auftreten können.The wet-on-wet application also ensures that there are no interfaces between the already applied resin and the new application layer can arise as they can occur when applied to a partially dried resin surface.

Ein Ausführungsbeispiel der Erfindung wird im Folgenden anhand der Figuren erläutert. Es zeigen in schematischer Darstellung:

Fig. 1
eine Darstellung des erfindungsgemäßen Verfahrens; und
Fig. 2
eine Ansicht der Auftragung und Dosierung der Beschichtungsmasse gemäß der Erfindung.
An embodiment of the invention will be explained below with reference to the figures. In a schematic representation:
Fig. 1
a representation of the method according to the invention; and
Fig. 2
a view of the application and dosage of the coating composition according to the invention.

Das in der Figur 1 schematisch dargestellte Verfahren 100 dient der Herstellung von harzimprägnierten Papieren, die zusätzlich mit bestimmten Funktionalitäten ausgestattet werden sollen. In der hier gezeigten Ausführungsform dient das Verfahren 100 insbesondere der Herstellung von abriebfesten Overlays von Laminatfußböden.That in the FIG. 1 schematically illustrated method 100 is used for the production of resin-impregnated papers, which should also be equipped with certain functionalities. In the embodiment shown here, the method 100 is used in particular for producing abrasion-resistant overlays of laminate floors.

Das Verfahren 100 beginnt mit der Abwicklung eines so genannten Overlay-Basispapiers von einer hier nicht dargestellten Rolle. Die Papierbahn 10 wird dann durch die Walzen 11 auf die Anfeuchtwalze 12 gedrückt, welche aus der ersten Harzwanne 13 die das Imprägniermittel 14 in Gestalt eines Harzes an die Papierbahn 10 einseitig anträgt.The method 100 begins with the processing of a so-called overlay base paper from a role, not shown here. The paper web 10 is then pressed by the rollers 11 on the Anfeuchtwalze 12, which from the first resin pan 13 which applies the impregnating agent 14 in the form of a resin to the paper web 10 on one side.

Die einseitig beschichtete Papierbahn 10 wird dann mittels der Umlenkwalzen 17 weiter geführt und kann in dieser Zeit durch Feuchtigkeits- und Harzaufnahme in die Faserstruktur des Papiers quellen.The single-sided coated paper web 10 is then guided by means of the guide rollers 17 and can swell in this time by moisture and resin absorption in the fiber structure of the paper.

Durch anschließendes Untertauchen der Papierbahn 10 in der zweiten Harzwanne 19 wird weiteres Imprägniermittel 18 in Form von Harz aufgenommen. Die so auf die Papierbahn 10 aufgebrachte Harzmenge wird durch die Spaltweite des Walzenspalts 24 zwischen den Dosierwalzen 22 und 23 gesteuert.Subsequent immersion of the paper web 10 in the second resin tub 19 further impregnating agent 18 is received in the form of resin. The amount of resin thus applied to the paper web 10 becomes controlled by the nip width of the nip 24 between the metering rollers 22 and 23.

Um ein abriebfestes Overlay herzustellen, wird die so imprägnierte Papierbahn 10 in einem weiteren Verfahrensschritt über die Umlenkwalzen 25 an einer Anspüldüse vorbei geführt, über die an die Papierbahn 10 eine Harz-Grobkorund-Dispersion 27 im Überschuss angespült wird. Das gewünschte Auftragsgewicht der Harz-Korund-Dispersion wird dann über die Spaltbreite zwischen den Dosierwalzen 26 eingestellt.
Um ein scheuerfestes Overlay zu erhalten, wird wie oben beschrieben nach dem Auftragen und Dosieren der Grobkorund-Dispersion auf der gegenüberliegenden Papierseite eine Beschichtungsmasse 29 in Form einer Feinkorund-Dispersion angetragen und über die Rakel 32 dosiert (siehe auch Figur 2).In order to produce an abrasion-resistant overlay, the thus impregnated paper web 10 is guided in a further process step over the guide rollers 25 to a spray nozzle over which a resin coarse corundum dispersion 27 is rinsed in excess to the paper web 10. The desired application weight of the resin-corundum dispersion is then adjusted across the gap width between the metering rollers 26.
In order to obtain a scrub-resistant overlay, a coating composition 29 in the form of a fine corundum dispersion is applied as described above after application and dosing of the coarse corundum dispersion on the opposite paper side and metered via the doctor blade 32 (see also US Pat FIG. 2 ).

Im Anschluss wird die beschichtete Papierbahn 10 getrocknet und in der Restfeuchte so eingestellt dass ein mit gut verarbeitbares Overlay erhalten wird.Subsequently, the coated paper web 10 is dried and adjusted in the residual moisture so that a well processable overlay is obtained.

Die vorliegende Erfindung beschränkt sich in ihrer Ausführungsform nicht auf die vorstehend angegebenen, bevorzugten Ausführungsbeispiele. Vielmehr ist eine Anzahl von Varianten denkbar, welche von der dargestellten Lösung auch bei grundsätzlich anders gearteten Ausführungen Gebrauch machen. Somit können die Rakel 31, 32 verschiedene Ausgestaltungen haben. Auch können andere Dosiervorrichtungen als Walzenpaare Verwendung finden. Zudem ist das Verfahren nicht auf die Herstellung von abriebfesten Overlays mit einem oberseitigen Additivstrich beschränkt. Vielmehr kann das Verfahren auch zur Herstellung von nichtabriebfesten Overlays bzw. sonstigen harzimprägnierten Papieren herangezogen werden, die zusätzlich mit Funktionalitäten ausgestattet werden sollen.The present invention is not limited in its embodiment to the above-mentioned, preferred embodiments. Rather, a number of variants are conceivable, which make use of the illustrated solution even with fundamentally different types of execution. Thus, the doctor blades 31, 32 can have different configurations. Also, other metering devices can be used as pairs of rollers. In addition, the method is not limited to the production of abrasion-resistant overlays with a top-side additive coat. Rather, the method can also be used for the production of non-abrasion-resistant overlays or other resin-impregnated papers, which should also be equipped with functionalities.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

100100
Verfahrenmethod
1010
Papierbahnpaper web
1111
Umlenkwalzedeflecting
1212
Anfeuchtwalzemoistening roller
1313
erste Harzwannefirst resin tub
1414
Imprägniermittel (Harz)Impregnating agent (resin)
1717
Umlenkwalzedeflecting
1818
Imprägniermittel (Harz)Impregnating agent (resin)
1919
zweite Harzwannesecond resin tub
2222
Dosierwalzemetering
2323
Dosierwalzemetering
2424
Walzenspaltnip
2525
Umlenkwalzedeflecting
2626
Dosierwalzemetering
2727
Harz-Grobkorund-DispersionResin-coarse corundum dispersion
2828
Umlenkwalzendeflection rollers
2929
Beschichtungsmassecoating
3131
Rakeldoctor
3232
Rakeldoctor

Claims (7)

  1. A method (100) for producing an overlay, in particular for laminates, comprising the following process steps:
    a) unrolling an overlay base paper from a roll to obtain a paper web (10);
    b) moistening the paper web (10) on one side with an impregnating agent (14);
    c) impregnating the paper web (10) to the core of the same and metering the application of an impregnating agent provided for the impregnation;
    d) wet-in-wet application of a coarse corundum-resin dispersion (27) on one side of the paper web (10) and metering the application;
    e) wet-in-wet application of a coating compound (29) on the opposite side of the paper web (10);
    f) metering the applied coating compound (29) by means of a metering apparatus, in particular by means of at least one doctor blade (31, 32) to the desired application weight;
    g) drying the paper web (10) using an entire drying channel length and capacity.
  2. The method according to claim 1, characterised in that after impregnating the paper web (10), one-sided washing of the paper web (10) by means of a resin-coarse corundum dispersion (27) is carried out.
  3. The method according to claim 1 or 2, characterised in that the one-sided wet-in-wet application of the coating compound (29) is made in the form of a resin-additive application.
  4. The method according to any one of the preceding claims, characterised in that the coating compound (29) is guided between two doctor blades (31, 32).
  5. The method according to any one of the preceding claims, characterised in that the underside of the paper web (10) is brought against the doctor blade (31, 32) and spread by means of the doctor blade (31, 32).
  6. The method according to any one of the preceding claims, characterised in that the coating compound (29) is distributed uniformly.
  7. The method according to any one of the preceding claims, characterised in that the coating compound (29) is supplied through an inlet gap (33) to the paper web (10).
EP09001209A 2008-02-12 2009-01-29 Method for producing a scour-proof overlay Revoked EP2090695B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09001209T PL2090695T3 (en) 2008-02-12 2009-01-29 Method for producing a scour-proof overlay

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Application Number Priority Date Filing Date Title
DE102008008808A DE102008008808A1 (en) 2008-02-12 2008-02-12 Method for producing a scuff-resistant overlay

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EP2090695A1 EP2090695A1 (en) 2009-08-19
EP2090695B1 true EP2090695B1 (en) 2010-04-21

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US (1) US20090208646A1 (en)
EP (1) EP2090695B1 (en)
AT (1) ATE465297T1 (en)
CA (1) CA2653921A1 (en)
DE (2) DE102008008808A1 (en)
ES (1) ES2344819T3 (en)
PL (1) PL2090695T3 (en)
PT (1) PT2090695E (en)

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Also Published As

Publication number Publication date
CA2653921A1 (en) 2009-08-12
ES2344819T3 (en) 2010-09-07
DE102008008808A1 (en) 2009-08-13
EP2090695A1 (en) 2009-08-19
PL2090695T3 (en) 2010-09-30
US20090208646A1 (en) 2009-08-20
ATE465297T1 (en) 2010-05-15
PT2090695E (en) 2010-07-22
DE502009000013D1 (en) 2010-06-02

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