EP1423208B1 - Method for producing parts having a sealing layer on the surface - Google Patents

Method for producing parts having a sealing layer on the surface Download PDF

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Publication number
EP1423208B1
EP1423208B1 EP02742758A EP02742758A EP1423208B1 EP 1423208 B1 EP1423208 B1 EP 1423208B1 EP 02742758 A EP02742758 A EP 02742758A EP 02742758 A EP02742758 A EP 02742758A EP 1423208 B1 EP1423208 B1 EP 1423208B1
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EP
European Patent Office
Prior art keywords
roller
release agent
layer
smoothing
melt layer
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.)
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EP02742758A
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German (de)
French (fr)
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EP1423208B2 (en
EP1423208A2 (en
Inventor
Klaus Becker-Weimann
Oliver BÜKER
Uwe Schroeder
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Kleiberit SE and Co KG
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Klebchemie MG Becker GmbH and Co KG
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Application filed by Klebchemie MG Becker GmbH and Co KG filed Critical Klebchemie MG Becker GmbH and Co KG
Priority to SI200230353T priority Critical patent/SI1423208T2/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/06Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
    • B05D7/08Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood using synthetic lacquers or varnishes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00Processes for applying liquids or other fluent materials
    • B05D1/26Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
    • B05D1/265Extrusion coatings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00Processes for applying liquids or other fluent materials
    • B05D1/28Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2503/00Polyurethanes

Definitions

  • the invention relates to a method for producing parts with a sealing layer on the surface and on such parts.
  • lacquers are currently used as a sealing layer on the surface of parts in large quantities, such as in the furniture and woodworking industry, but also in parts made of steel, non-ferrous metals, plastic, paper, cardboard, paper mache or mineral materials .
  • a widespread paint system are UV-curing coatings, which are usually applied by roller application, less often sprayed on the parts. The subsequent curing process is carried out with UV light or UV lamps.
  • the mechanical complexity of painting with UV coatings is very high and requires a very large amount of space.
  • the large space requirement is also due to the fact that coating operations with UV-curing systems usually require several jobs - in practice, three to four jobs are common. Due to the viscosity, but especially due to the UV curing, only about 10 to 20 my layers can be applied with each coating application, which is why several coating jobs are necessary. UV lamps and the necessary energy for curing are very expensive.
  • Object of the present invention is to develop the prior art advantageous.
  • a water- and solvent-free, moisture-curing, polyurethane-based reactive melt layer can also be advantageously used to replace a previous coating on various other materials to form a sealant layer. So this is possible for furniture parts that may consist of solid wood or fumed parts with a wood or wood-based material and glued veneer.
  • a reactive melt layer can also be used for sealing wood-like materials, parts of steel, non-ferrous metals, plastic, paper, cardboard, paper mache or mineral substances.
  • a single coat without intermediate treatment in the form of grinding, curing or the like can be used to form a sealing layer with layer thicknesses between 5 and 150 microns, which has a very high abrasion resistance, high hardness and scratch resistance, good impact resistance and residual elasticity
  • a high chemical resistance and depending on requirements and needs has a high UV resistance.
  • this type of surface refinement is mechanically simple and therefore more economical.
  • any parts having a sealing layer on its surface formed as a water-free, solvent-free, moisture-curing reactive polyurethane-based melt layer an improvement in surface properties can be achieved by applying to the surface after application the portion of the reactive melt layer is smoothed. As a result, unevenness of the surface can be avoided, which can result from the mere application of the hot reactive melt and it results in an even smoother surface. It is then also possible to work with smaller amounts of material between 70 and 100 g / m 2 of reactive melt.
  • the water- and solvent-free reactive-melt layer is applied to the surface to be sealed at a temperature above 100 ° C, about 100 ° C to 140 ° C. In this case, about 70 to 100 g of reactive melt are applied per square meter of surface to be coated.
  • the reactive melt usually has a density of about 1.1 g / m 2 and a Brookfield viscosity at 120 ° C of about 4,000 mPas and at 140 ° C of about 2,400 mPas. It is advantageous to apply the reactive melt layer under exclusion of air and shielding from atmospheric moisture to prevent premature Ausreagieren.
  • the layer can, for example, be doctored, rolled, sprayed or applied by means of a nozzle or slot die. Even when cured as a 100% solid, the reactive melt layer still has some residual elasticity.
  • the parts Before any further processing of the surface-coated parts, the parts should be able to crosslink for 3 to 5 days depending on the moisture content, so that an almost complete cross-linking has occurred and then surface scratches are avoided.
  • further processing can, for example, consist in the profiling of the tongue and groove joints. If necessary, further processing may also be necessary for other parts, or the production process is terminated with the surface coating according to the invention.
  • the smoothing by means of a roller, for example a steel roller, which may optionally be provided with a polyurethane coating.
  • the roller is wetted with a release agent during smoothing.
  • the release agent is applied as a solvent-free and low-viscosity agent based on paraffin wax.
  • Such a means prevents on the one hand the sticking of the reactive melt layer on the roller and, moreover, the surface of the reactive melt layer becomes much smoother and immediately block-free. An increase in the gloss level of the finished sealing layer can also be achieved with this release agent.
  • the release agent based on paraffin wax is clear and has a density of about 0.85 g / cm 3 and a viscosity at 20 ° C according to Brookfield of about 34 mPas.
  • the order amount is about 20 to 35 g / m 2 .
  • the release agent is applied to the roller, for example, by the spray method or vacuum spray method. However, it is preferred to apply the release agent to the roll by means of a soaked felt, which is a particularly simple and safe way of providing a uniform, thin release film during the smoothening of the reactive blacksmith compound layer.
  • An apparatus for producing parts having a sealing layer on its surface includes an application station, a transporting device and a smoothing station. It is advantageous if a heating device is arranged between the application station and the smoothing station.
  • the smoothing station comprises at least one roller, which is for example a steel roller and may have a polyurethane coating. Moreover, it is advantageous if the roller is wettable with a release agent. This release agent is about a paraffin wax-based agent. For wetting the roller with the release agent, for example, a spray device, a vacuum spray device or a soaked felt may be provided.
  • a section of any part 1 is shown, for example, a floorboard for parquet floors.
  • the actual plank usually consists of several, not shown in the drawing layers, namely at least one cover layer of wood, which is glued to one or more sub-layers.
  • a sealant layer 2 of a water and solvent free, moisture-cured, polyurethane-based reactive melt layer which has been smoothed during manufacture by means of a roller wetted with a paraffin-based release agent after application.
  • This smoothing process results in a particularly smooth surface of the sealing layer, which is indicated by the further line 3.
  • the production line 4 contains a transport device 5 for the parts to be coated.
  • the reactive melt layer is heated to at least 100 ° C under exclusion of air and shielding and then pumped by a pumping device, not shown, into a heated hose, passed through the hose to an applicator, such as a slot 7 and of the slot nozzle is applied to the part 1.
  • the production line and its components are controlled by an indicated control unit 13 and controlled.
  • a schematic drive unit 14 for the transport device 5 is indicated.
  • the coated with the reactive melt Part 1 is transported by the application station to the fixing and smoothing station 8. Between the application of the reactive melt layer 2 and the fixing station 8, the surface of the reactive melt layer is supplied with heat via an indicated heating device 9 in order to keep the reactive melt layer at least viscous.
  • rollers 10 are rotatably mounted and optionally height-adjustable.
  • the rollers are for example provided with a polyurethane coating.
  • the felt releases a uniform small amount of the release agent as a thin layer on the surface of the rollers 10 which they pass on contact with the surface of the reactive melt layer 2.
  • the release agent the surface of the reactive melt layer 2 is immediately block-free and the smoothing process supported.
  • the coated and smoothed parts are transported further from the fixing and smoothing station 8 by the transport device 5 and are usually temporarily stored for crosslinking of the reactive melt layer 2 for about three to five days.
  • the reactive melt layer 2 forms a sealant layer integral with part 1, which is a 100% solids and whose thickness can be adjusted between 5 and 150 microns during application depending on requirements.
  • a further processing of Part 1 could consist in the case of the floorboard for parquet floors in a profiling of the tongue and groove area of the floorboard.
  • inventive method is not limited to the application in planks for parquet boards, but can be used for the production of any parts with a sealing layer on the surface.

Abstract

The invention relates to a method and a device for producing parts (1) having a sealing layer (2) on the surface, and corresponding parts. Said method and device are improved in that the sealing layer (2) is applied to the surface in the form of a water-free and solvent-free reactive hot melt layer based on polyurethane and hardened by atmospheric humidity, and the inventive device comprises an application station (6), a transport device (5) and a smoothing station (8).

Description

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung von Teilen mit einer Versiegelungsschicht auf der Oberfläche und auf derartige Teile.The invention relates to a method for producing parts with a sealing layer on the surface and on such parts.

In den verschiedensten Anwendungsgebieten kommen zur Zeit Lacke als Versiegelungsschicht auf der Oberfläche von Teilen in großen Mengen zum Einsatz, so etwa in de Möbel- und holzverarbeitenden Industrie, aber auch bei Teilen aus Stahl, Nichteisenmetallen, Kunststoff, Papier, Pappe, Pappmaché oder mineralischen Stoffen. Ein weitverbreitetes Lacksystem sind UV-härtende Lacke, die meist per Walzenauftrag, seltener im Sprühauftrag auf die Teile aufgetragen werden. Der anschließende Aushärtevorgang erfolgt mit UV-Licht bzw. UV-Lampen. Der maschinelle Aufwand bei der Lackierung mit UV-Lacken ist sehr hoch und erfordert einen sehr großen Raumbedarf. Der große Raumbedarf liegt auch darin begründet, daß Lackiervorgänge mit UV-härtenden Systemen meist mehrere Aufträge - in der Praxis sind drei bis vier Aufträge gängig - erfordern. Mit jedem Lackauftrag können aufgrund der Viskosität, speziell aber aufgrund der UV-Durchhärtung nur ca. 10 bis 20 my Schichten appliziert werden, weshalb auch mehrere Lackaufträge notwendig sind. UV-Lampen und die notwendige Energie zur Aushärtung sind sehr teuer.In various fields of application, lacquers are currently used as a sealing layer on the surface of parts in large quantities, such as in the furniture and woodworking industry, but also in parts made of steel, non-ferrous metals, plastic, paper, cardboard, paper mache or mineral materials , A widespread paint system are UV-curing coatings, which are usually applied by roller application, less often sprayed on the parts. The subsequent curing process is carried out with UV light or UV lamps. The mechanical complexity of painting with UV coatings is very high and requires a very large amount of space. The large space requirement is also due to the fact that coating operations with UV-curing systems usually require several jobs - in practice, three to four jobs are common. Due to the viscosity, but especially due to the UV curing, only about 10 to 20 my layers can be applied with each coating application, which is why several coating jobs are necessary. UV lamps and the necessary energy for curing are very expensive.

Auch andere Lacksysteme, wie z.B. 2-K-PUR-Lacke, Nitrolacke oder Wasserlacke müssen ebenfalls in mehreren Schichten aufgetragen werden. Füller, Grundierungen und gegebenenfalls Zwischenschliffe sind auch hier immer notwendig und machen die Oberflächenbeschichtung komplex und maschinell sehr aufwendig und teuer.Other coating systems, such as 2-component PUR coatings, nitro lacquers or water-based paints, must also be applied in several coats. Filler, primers and optionally intermediate grinding are always necessary here and make the surface coating complex and very complex and expensive machine.

Aus der DE 198 06 136 C2 ist es bekannt, bei einer Diele für Parkettböden mit wenigstens einer Holzschicht und einer Versiegelungsschicht auf ihrer Oberfläche vorzusehen, daß die Versiegelungsschicht als eine wasser- und lösungsmittelfreie, mit der Luftfeuchtigkeit aushärtende Reaktiv-Schmelzmasse-Schicht auf Polyurethanbasis ausgebildet ist. Die Reaktiv-Schmelzmasse-Schicht wird dabei auf die Holzschicht aufgerakelt, aufgewalzt oder aufgesprüht. Bei diesem Auftrag kann es zu unerwünschten Unebenheiten in der Versiegelungssschicht kommen. Außerdem ist die Reaktiv-Schmelzmasse-Schicht nach dem Auftragen noch klebrig, so daß bei der Handhabung der Parkettdielen-Halbfabrikate die Versiegelungsschicht beschädigt werden kann oder die einzelnen Teile beim Stapeln aneinander kleben können. Die nach der DE 198 06 136 C2 vorgeschlagene Kühlzone ist in der Praxis mit einem hohen Aufwand für die Bereitstellung der sehr kalten, feuchten Luft verbunden.From DE 198 06 136 C2 it is known to provide in a floorboard for parquet floors with at least one layer of wood and a sealing layer on its surface, that the sealing layer as a water and solvent-free, with the humidity curing reactive melt layer formed polyurethane-based is. The reactive enamel composition layer is doctored onto the wood layer, rolled or sprayed on. This job can cause unwanted unevenness in the sealant layer. In addition, the reactive-melt layer after application is still sticky, so that in the handling of parquet flooring semifinished products, the sealing layer can be damaged or the individual parts can stick together when stacking. The proposed according to DE 198 06 136 C2 cooling zone is connected in practice with a high cost for the provision of very cold, humid air.

Aufgabe der vorliegenden Erfindung ist es, den Stand der Technik vorteilhaft weiterzubilden.Object of the present invention is to develop the prior art advantageous.

Gelöst wird diese Aufgabe mit den Merkmalen des unabhängigen Anspruchs 1.This problem is solved by the features of independent claim 1.

Zunächst ist erkannt worden, daß eine wasser- und lösungsmittelfreie, mit der Luftfeuchtigkeit aushärtende Reaktiv-Schmelzmasse-Schicht auf Poyurethanbasis auch zur Bildung einer Versiegelungsschicht auf verschiedenen anderen Materialien vorteilhaft zum Ersatz der bisherigen Lacke eingesetzt werden kann. So ist dies bei Möbelteilen, die aus Vollholz oder fumierten Teilen mit einem Holz- oder Holzwerkstoffträgermaterial und aufgeklebtem Furnier bestehen können, möglich. Daneben kann eine solche Reaktive-Schmelzmasse-Schicht auch zur Versiegelung von holzartigen Stoffen, von Teilen aus Stahl, Nichteisenmetallen, Kunststoff, Papier, Pappe, Pappmaché oder mineralischen Stoffen verwendet werden. Bei allen diesen unterschiedlichen Materialien kann mit einem einzigen Auftrag ohne Zwischenbehandlung in Form von Schleifen, Aushärten oder ähnliches eine Versiegelungsschicht mit Schichtstärken zwischen 5 und 150 my ausgebildet werden, die eine sehr hohe Abriebbeständigkeit, eine hohe Härte- und Kratzfestigkeit, eine gute Stoßfestigkeit und Restelastizität zur Vermeidung von Sprödrissen, eine hohe Chemikalienbeständigkeit und je nach Anforderung und Bedarf eine hohe UV-Beständigkeit aufweist. Zudem ist diese Art der Oberflächenveredelung maschinell einfach und dadurch wirtschaftlicher.First, it has been recognized that a water- and solvent-free, moisture-curing, polyurethane-based reactive melt layer can also be advantageously used to replace a previous coating on various other materials to form a sealant layer. So this is possible for furniture parts that may consist of solid wood or fumed parts with a wood or wood-based material and glued veneer. In addition, such a reactive melt layer can also be used for sealing wood-like materials, parts of steel, non-ferrous metals, plastic, paper, cardboard, paper mache or mineral substances. For all these different materials, a single coat without intermediate treatment in the form of grinding, curing or the like can be used to form a sealing layer with layer thicknesses between 5 and 150 microns, which has a very high abrasion resistance, high hardness and scratch resistance, good impact resistance and residual elasticity To prevent Sprödrissen, a high chemical resistance and depending on requirements and needs has a high UV resistance. In addition, this type of surface refinement is mechanically simple and therefore more economical.

Daneben kann bei beliebigen Teilen, mit einer Versiegelungsschicht auf ihrer Oberfläche, die als eine wasser- und lösungsmittelfreie, mit der Luftfeuchtigkeit aushärtende Reaktiv-Schmelzmasse-Schicht auf Polyurethanbasis ausgebildet ist, eine Verbesserung der Oberflächeneigenschaften dadurch erzielt werden, daß nach dem Aufbringen auf die Oberfläche des Teils die Reaktiv-Schmelzmasse-Schicht geglättet wird. Dadurch werden Unebenheiten der Oberfläche vermieden, die sich durch den bloßen Auftrag der heißen Reaktiv-Schmelzmasse ergeben können und es ergibt sich eine noch glattere Oberfläche. Es ist dann auch möglich, mit geringeren Materialmengen zwischen 70 und 100 g/m2 an Reaktiv-Schmelzmasse zu arbeiten.Besides, in any parts having a sealing layer on its surface formed as a water-free, solvent-free, moisture-curing reactive polyurethane-based melt layer, an improvement in surface properties can be achieved by applying to the surface after application the portion of the reactive melt layer is smoothed. As a result, unevenness of the surface can be avoided, which can result from the mere application of the hot reactive melt and it results in an even smoother surface. It is then also possible to work with smaller amounts of material between 70 and 100 g / m 2 of reactive melt.

Die wasser- und lösungsmittelfreie Reaktiv-Schmelzmasse-Schicht wird auf die zu versiegelnde Fläche bei einer Temperatur oberhalb von 100 °C, etwa 100 °C bis 140 °C aufgebracht. Dabei werden pro Quadratmeter zu beschichtender Oberfläche etwa 70 bis 100 g Reaktiv-Schmelzmasse aufgetragen. Die Reaktiv-Schmelzmasse besitzt üblicherweise eine Dichte von ca. 1,1 g/m2 und ein Viskosität nach Brookfield bei 120 °C von ca. 4.000 mPas und bei 140 °C von ca. 2.400 mPas. Günstig ist es, die Reaktiv-Schmelzmasse-Schicht unter Luftabschluß und Abschirmung von Luftfeuchtigkeit aufzubringen, um ein vorzeitiges Ausreagieren zu verhindern. Die Schicht kann beispielsweise aufgerakelt, ausgewalzt, aufgesprüht oder mittels einer Düse oder Schlitzdüse aufgebracht werden. Selbst im ausgehärteten Zustand als 100-%-iger Festkörper weist die Reaktiv-Schmelzmasse-Schicht noch eine gewisse Restelastizität auf.The water- and solvent-free reactive-melt layer is applied to the surface to be sealed at a temperature above 100 ° C, about 100 ° C to 140 ° C. In this case, about 70 to 100 g of reactive melt are applied per square meter of surface to be coated. The reactive melt usually has a density of about 1.1 g / m 2 and a Brookfield viscosity at 120 ° C of about 4,000 mPas and at 140 ° C of about 2,400 mPas. It is advantageous to apply the reactive melt layer under exclusion of air and shielding from atmospheric moisture to prevent premature Ausreagieren. The layer can, for example, be doctored, rolled, sprayed or applied by means of a nozzle or slot die. Even when cured as a 100% solid, the reactive melt layer still has some residual elasticity.

Vor einer möglichen Weiterverarbeitung der oberflächenbeschichteten Teile sollten die Teile je nach Feuchteangebot 3 bis 5 Tage vernetzen können, damit eine nahezu vollständige Vernetzung eingetreten ist und dann Oberflächenkratzer vermieden werden. Bei Parkettdielen kann eine Weiterverarbeitung etwa in der Profilierung der Nut-Feder-Verbindungen bestehen. Auch bei anderen Teilen kann gegebenenfalls eine Weiterverabeitung notwendig sein, oder der Herstellungsvorgang ist mit der erfindungsgemäßen Beschichtung der Oberfläche beendet.Before any further processing of the surface-coated parts, the parts should be able to crosslink for 3 to 5 days depending on the moisture content, so that an almost complete cross-linking has occurred and then surface scratches are avoided. In the case of parquet planks, further processing can, for example, consist in the profiling of the tongue and groove joints. If necessary, further processing may also be necessary for other parts, or the production process is terminated with the surface coating according to the invention.

Mit den erfindungsgemäßen Verfahren können die unterschiedlichsten Teile hergestellt werden. Neben Dielen für Parkettböden können damit Möbelteile oder andere Teile aus holzartigen Stoffen hergestellt werden. Daneben können Stahlteile und Teile aus Nichteisenmetallen, Kunststoff, Papier, Pappe, Pappmaché und mineralischen Stoffen beschichtet werden. Auch weitere Einsatzgebiete der Oberflächenbschichtung sind denkbar.With the method according to the invention, the most varied parts can be produced. In addition to planks for parquet floors so that furniture parts or other parts made of wood-like materials can be produced. In addition, steel parts and parts made of non-ferrous metals, plastic, paper, cardboard, paper mache and mineral materials can be coated. Other applications of Oberflächenbschichtung are conceivable.

Vorteilhaft ist es, der Oberfläche der Reaktiv-Schmelzmasse-Schicht zwischen dem Aufbringen und dem Glätten noch einmal Wärme zuzuführen, um das Ergebnis der Glättung weiter zu verbessern. Günstigerweise erfolgt das Glätten mittels einer Walze, beispielsweise einer Stahlwalze, die gegebenenfalls mit einer Polyurethan-Beschichtung versehen sein kann.It is advantageous to once again supply heat to the surface of the reactive hotmelt layer between the application and smoothing, in order to further improve the result of the smoothing. Conveniently, the smoothing by means of a roller, for example a steel roller, which may optionally be provided with a polyurethane coating.

Besonders vorteilhaft ist es, wenn die Walze während des Glättens mit einem Trennmittel benetzt wird. Auf diese Weise wird es wirksam verhindert, daß die noch nicht ausgehärtete Reaktiv-Schmelzmasse-Schicht auf dem zu versiegelnden Teil abreißt und an der Walze anklebt. Vorzugsweise wird das Trennmittel als lösemittelfreies und niedrigviskoses Mittel auf Paraffinwachs-Basis aufgebracht. Ein solches Mittel verhindert zum einen das Ankleben der Reaktiv-Schmelzmasse-Schicht an der Walze und darüber hinaus wird die Oberfläche der Reaktiv-Schmelzmasse-Schicht wesentlich glatter und sofort blockfrei. Auch eine Erhöhung des Glanzgrades der fertigen Versiegelungsschicht ist mit diesem Trennmittel erreichbar. Das Trennmittel auf Paraffinwachs-Basis ist klar und besitzt eine Dichte von ca. 0,85 g/cm3 sowie eine Viskosität bei 20 °C nach Brookfield von ca. 34 mPas. Die Auftragsmenge beträgt ca. 20 bis 35 g/m2.It is particularly advantageous if the roller is wetted with a release agent during smoothing. In this way, it is effectively prevented that the not yet cured reactive melt layer breaks off on the part to be sealed and adheres to the roller. Preferably, the release agent is applied as a solvent-free and low-viscosity agent based on paraffin wax. Such a means prevents on the one hand the sticking of the reactive melt layer on the roller and, moreover, the surface of the reactive melt layer becomes much smoother and immediately block-free. An increase in the gloss level of the finished sealing layer can also be achieved with this release agent. The release agent based on paraffin wax is clear and has a density of about 0.85 g / cm 3 and a viscosity at 20 ° C according to Brookfield of about 34 mPas. The order amount is about 20 to 35 g / m 2 .

Das Trennmittel wird beispielsweise im Sprühverfahren oder Vakuum-Sprühverfahren auf die Walze aufgebracht. Bevorzugt ist es jedoch, das Trennmittel mittels eines getränkten Filzes auf die Walze aufzubringen, was eine besonders einfache und sichere Möglichkeit zur Schaffung eines gleichmäßigen, dünnen Trennmittelfilms während des Glättens der Reaktiv-Schmetzmasse-Schicht darstellt.The release agent is applied to the roller, for example, by the spray method or vacuum spray method. However, it is preferred to apply the release agent to the roll by means of a soaked felt, which is a particularly simple and safe way of providing a uniform, thin release film during the smoothening of the reactive blacksmith compound layer.

Eine Vorrichtung zur Herstellung von Teilen mit einer Versiegelungsschicht auf ihrer Oberfläche enthält eine Auftragsstation, eine Transporteinrichtung und eine Glättstation. Dabei ist es günstig, wenn zwischen der Auftragsstation und der Glättstation eine Wärmeeinrichtung angeordnet ist.An apparatus for producing parts having a sealing layer on its surface includes an application station, a transporting device and a smoothing station. It is advantageous if a heating device is arranged between the application station and the smoothing station.

In einer bevorzugten Ausführungsform der Vorrichtung enthält die Glättstation mindestens eine Walze, die beispielsweise eine Stahlwalze ist und eine Polyurethan-Beschichtung aufweisen kann. Außerdem ist es vorteilhaft, wenn die Walze mit einem Trennmittel benetzbar ist. Dieses Trennmittel ist etwa ein Mittel auf Paraffinwachs-Basis. Zur Benetzung der Walze mit dem Trennmittel kann beispielsweise eine Sprüheinrichtung, eine Vakuum-Sprüheinrichtung oder ein getränkter Filz vorgesehen sein.In a preferred embodiment of the device, the smoothing station comprises at least one roller, which is for example a steel roller and may have a polyurethane coating. Moreover, it is advantageous if the roller is wettable with a release agent. This release agent is about a paraffin wax-based agent. For wetting the roller with the release agent, for example, a spray device, a vacuum spray device or a soaked felt may be provided.

In der Zeichnung ist die Erfindung anhand eines Ausführungsbeispiels erläutert. Es zeigen:

Fig. 1
einen schematisch dargestellten Ausschnitt eines erfindungsgemäßen Teiles mit einer Versiegelungsschicht auf der Oberfläche,
Fig. 2
eine Ansicht einer Fertigungsstraße für erfindungsgemäße Teile und
Fig. 3
einen Schnitt entlang der Linie III-III der Fig. 2.
In the drawing, the invention is explained with reference to an embodiment. Show it:
Fig. 1
a schematically illustrated section of a part according to the invention with a sealing layer on the surface,
Fig. 2
a view of a production line for parts according to the invention and
Fig. 3
a section along the line III-III of FIG. 2.

In Fig. 1 ist ein Ausschnitt eines beliebigen Teiles 1 dargestellt, beispielsweise einer Diele für Parkettböden. Im Falle einer Diele für Parkettböden besteht die eigentliche Diele üblicherweise aus mehreren, in der Zeichnung nicht dargestellten Schichten, nämlich mindestens einer Deckschicht aus Holz, die mit einer oder mehreren Unterschichten verklebt ist. Es könnte sich aber auch um einen Ausschnitt von Möbelteilen, die aus Vollholz oder furnierten Teilen mit einem Holz- oder Holzwerkstoffträgermaterial und aufgeklebtem Furnier bestehen können, oder von holzartigen Stoffen, von Teilen aus Stahl, Nichteisenmetallen, Kunststoff, Papier, Pappe, Pappmaché oder mineralischen Stoffen handeln.In Fig. 1, a section of any part 1 is shown, for example, a floorboard for parquet floors. In the case of a plank for parquet floors, the actual plank usually consists of several, not shown in the drawing layers, namely at least one cover layer of wood, which is glued to one or more sub-layers. It could also be a section of furniture parts, which may consist of solid wood or veneered parts with a wood or wood-based material and glued veneer, or of wood-like materials, parts made of steel, non-ferrous metals, plastic, paper, cardboard, paper mache or mineral Act substances.

Auf der Oberseite des Teiles 1 ist eine Versiegelungsschicht 2 aus einer wasser- und lösungsmittelfreien, mit der Luftfeuchtigkeit aushärtende Reaktiv-Schmelzmasse-Schicht auf Polyurethanbasis aufgebracht, die bei der Herstellung mittels einer mit einem Trennmittel auf Paraffinbasis benetzten Walze nach dem Aufbringen geglättet worden ist. Dieser Glättungsvorgang ergibt eine besonders glatte Oberfläche der Versiegelungsschicht, die durch den weiteren Strich 3 angedeutet ist.On the top of the part 1 there is applied a sealant layer 2 of a water and solvent free, moisture-cured, polyurethane-based reactive melt layer which has been smoothed during manufacture by means of a roller wetted with a paraffin-based release agent after application. This smoothing process results in a particularly smooth surface of the sealing layer, which is indicated by the further line 3.

Die Fig. 2 und 3 zeigen eine schematisch dargestellte Fertigungsstraße 4 zur kontinuierlichen Herstellung der erfindungsgemäßen Teile. Die Fertigungsstraße 4 enthält eine Transporteinrichtung 5 für die zu beschichtenden Teile. In einer Auftragsstation 6 wird die Reaktiv-Schmelzmasse-Schicht unter Luftabschluß und Abschirmung von Luftfeuchtigkeit auf mindestens 100 °C erhitzt und anschließend von einer nicht dargestellten Pumpvorrichtung in einen beheizten Schlauch gepumpt, durch den Schlauch zu einer Auftragseinrichtung, beispielsweise einer Schlitzdüse 7 geleitet und von der Schlitzdüse auf das Teil 1 aufgebracht. Die Fertigungsstraße und deren Bestandteile werden von einer angedeuteten Steuereinheit 13 kontrolliert und gesteuert. Außerdem ist eine schematische Antriebseinheit 14 für die Transporteinrichtung 5 angedeutet.2 and 3 show a schematically illustrated production line 4 for the continuous production of the parts according to the invention. The production line 4 contains a transport device 5 for the parts to be coated. In an application station 6, the reactive melt layer is heated to at least 100 ° C under exclusion of air and shielding and then pumped by a pumping device, not shown, into a heated hose, passed through the hose to an applicator, such as a slot 7 and of the slot nozzle is applied to the part 1. The production line and its components are controlled by an indicated control unit 13 and controlled. In addition, a schematic drive unit 14 for the transport device 5 is indicated.

Das mit der Reaktiv-Schmelzmasse beschichtete Teil 1 wird von der Auftragsstation zur Fixier- und Glättstation 8 weitertransportiert. Zwischen dem Aufbringen der Reaktiv-Schmelzmasse-Schicht 2 und der Fixierstation 8 wird der Oberfläche der Reaktiv-Schmelzmasse-Schicht über eine angedeutete Wärmeeinrichtung 9 Wärme zugeführt, um die Reaktiv-Schmelzmasse-Schicht zumindest zähflüssig zu halten.The coated with the reactive melt Part 1 is transported by the application station to the fixing and smoothing station 8. Between the application of the reactive melt layer 2 and the fixing station 8, the surface of the reactive melt layer is supplied with heat via an indicated heating device 9 in order to keep the reactive melt layer at least viscous.

In der Fixier- und Glättstation 8 sind drei Walzen 10 drehbar und gegebenenfalls höhenverstellbar gelagert. Die Walzen sind beispielsweise mit einer Polyurethan-Beschichtung versehen. Oberhalb jeder der Walzen 10 stehen diese in Kontakt mit einem Filz 11, der mit einem Trennmittel 12 auf Paraffinwachs-Basis getränkt ist. Durch die Drehung der Walzen gibt der Filz eine gleichmäßige geringe Menge des Trennmittels als eine dünne Schicht auf die Oberfläche der Walzen 10 ab, die diese beim Kontakt mit der Oberfläche der Reaktiv-Schmelzmasse-Schicht 2 weitergeben. Durch das Trennmittel wird die Oberfläche der Reaktiv-Schmelzmasse-Schicht 2 sofort blockfrei und der Glättvorgang unterstützt.In the fixing and smoothing station 8, three rollers 10 are rotatably mounted and optionally height-adjustable. The rollers are for example provided with a polyurethane coating. Above each of the rolls 10, they are in contact with a felt 11 impregnated with a paraffin wax-based release agent 12. By the rotation of the rollers, the felt releases a uniform small amount of the release agent as a thin layer on the surface of the rollers 10 which they pass on contact with the surface of the reactive melt layer 2. By the release agent, the surface of the reactive melt layer 2 is immediately block-free and the smoothing process supported.

Die beschichteten und geglätteten Teile werden aus der Fixier- und Glättstation 8 von der Transporteinrichtung 5 weitertransportiert und üblicherweise zur Vernetzung der Reaktiven-Schmelzmasse-Schicht 2 ca. drei bis fünf Tage zwischengelagert. Nach der vollständigen Vernetzung bildet die Reaktiv-Schmelzmasse-Schicht 2 eine mit dem Teil 1 fest verbundene Versiegelungsschicht, die einen 100-%-igen Festkörper darstellt und deren Dicke während des Auftrags je nach Anforderungen zwischen 5 und 150 my eingestellt werden kann. Eine Weiterverarbeitung des Teils 1 könnte im Fall der Diele für Parkettböden in einer Profilierung des Nut-Feder-Bereichs der Diele bestehen.The coated and smoothed parts are transported further from the fixing and smoothing station 8 by the transport device 5 and are usually temporarily stored for crosslinking of the reactive melt layer 2 for about three to five days. After complete crosslinking, the reactive melt layer 2 forms a sealant layer integral with part 1, which is a 100% solids and whose thickness can be adjusted between 5 and 150 microns during application depending on requirements. A further processing of Part 1 could consist in the case of the floorboard for parquet floors in a profiling of the tongue and groove area of the floorboard.

Abschließend sei jedoch nochmals darauf hingewiesen, daß das erfindungsgemäße Verfahren nicht auf die Anwendung bei Dielen für Parkettdielen beschränkt ist, sondern zur Herstellung beliebiger Teile mit einer Versiegelungsschicht auf der Oberfläche genutzt werden kann.Finally, it should again be noted that the inventive method is not limited to the application in planks for parquet boards, but can be used for the production of any parts with a sealing layer on the surface.

Claims (11)

  1. Method for producing a part having on its surface a sealing layer which is applied as a water-free and solvent-free reactive hot-melt layer, based on polyurethane and hardening by atmospheric humidity, to the surface of the part, characterized in that application is followed by smoothing of the reactive hot-melt layer.
  2. Method according to Claim 1, characterized in that between the application and the smoothing of the surface of the reactive hot-melt layer heat is supplied.
  3. Method according to Claim 1 or 2, characterized in that the smoothing of the reactive hot-melt layer takes place by means of at least one roller.
  4. Method according to Claim 3, characterized in that a steel roller is used.
  5. Method according to Claim 3 or 4, characterized in that the roller has a polyurethane coating.
  6. Method according to one of Claims 3 to 5,
    characterized in that the roller is wetted with a release agent during smoothing.
  7. Method according to Claim 6, characterized in that the release agent is applied as a solvent-free and low-viscosity agent based on paraffin wax.
  8. Method according to Claim 6 or 7, characterized in that the release agent is applied to the roller in a spraying procedure.
  9. Method according to Claim 6 or 7, characterized in that the release agent is applied in a vacuum spraying procedure.
  10. Method according to Claim 6 or 7, characterized in that the release agent is applied to the roller by means of an impregnated felt.
  11. Method according to one of Claims 1 to 10, characterized in that the part is a furniture part or a part composed of a wood-like material, steel, a non-ferrous metal, plastic, paper, cardboard or papier maché or of a mineral material.
EP02742758A 2001-05-18 2002-05-16 Method for producing parts having a sealing layer on the surface Expired - Lifetime EP1423208B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200230353T SI1423208T2 (en) 2001-05-18 2002-05-16 Method for producing parts having a sealing layer on the surface

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10124676A DE10124676A1 (en) 2001-05-18 2001-05-18 Production of furniture parts and flooring with a polyurethane surface sealing layer, useful in production of parquet flooring as well as furniture parts
DE10124676 2001-05-18
PCT/DE2002/001771 WO2002094457A2 (en) 2001-05-18 2002-05-16 Method and device for producing parts having a sealing layer on the surface, and corresponding parts

Publications (3)

Publication Number Publication Date
EP1423208A2 EP1423208A2 (en) 2004-06-02
EP1423208B1 true EP1423208B1 (en) 2006-04-05
EP1423208B2 EP1423208B2 (en) 2009-01-07

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Country Status (10)

Country Link
US (1) US7939137B2 (en)
EP (1) EP1423208B2 (en)
JP (1) JP2004531388A (en)
AT (1) ATE322350T1 (en)
AU (1) AU2002338833A1 (en)
CA (1) CA2447609C (en)
DE (3) DE10124676A1 (en)
ES (1) ES2265042T5 (en)
SI (1) SI1423208T2 (en)
WO (1) WO2002094457A2 (en)

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Also Published As

Publication number Publication date
WO2002094457A3 (en) 2004-03-11
JP2004531388A (en) 2004-10-14
DE10124676A1 (en) 2002-11-28
SI1423208T1 (en) 2006-10-31
DE50206330D1 (en) 2006-05-18
EP1423208B2 (en) 2009-01-07
ES2265042T5 (en) 2009-05-04
US7939137B2 (en) 2011-05-10
US20050255250A1 (en) 2005-11-17
EP1423208A2 (en) 2004-06-02
SI1423208T2 (en) 2009-06-30
ES2265042T3 (en) 2007-02-01
DE10292159D2 (en) 2003-12-24
WO2002094457A2 (en) 2002-11-28
CA2447609A1 (en) 2002-11-28
AU2002338833A1 (en) 2002-12-03
ATE322350T1 (en) 2006-04-15
CA2447609C (en) 2012-02-28

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