EP0371371A2 - Method for producing a texture, particularly a wood-like texture, in the surface of a hardened fibre board - Google Patents

Method for producing a texture, particularly a wood-like texture, in the surface of a hardened fibre board Download PDF

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Publication number
EP0371371A2
EP0371371A2 EP89121478A EP89121478A EP0371371A2 EP 0371371 A2 EP0371371 A2 EP 0371371A2 EP 89121478 A EP89121478 A EP 89121478A EP 89121478 A EP89121478 A EP 89121478A EP 0371371 A2 EP0371371 A2 EP 0371371A2
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EP
European Patent Office
Prior art keywords
resin
fiberboard
water mixture
texture
hardened
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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.)
Granted
Application number
EP89121478A
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German (de)
French (fr)
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EP0371371B1 (en
EP0371371A3 (en
Inventor
Harald Dipl.-Ing. Risius
Wilhelm Oldemeyer
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Glunz AG
Original Assignee
TOPAN GmbH
Glunz AG
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Publication of EP0371371A2 publication Critical patent/EP0371371A2/en
Publication of EP0371371A3 publication Critical patent/EP0371371A3/en
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Publication of EP0371371B1 publication Critical patent/EP0371371B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/20—Applying plastic materials and superficially modelling the surface of these materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/24—Pressing or stamping ornamental designs on surfaces

Definitions

  • the invention relates to a method for producing a structure, in particular a wood structure, on the surface of fiberboard, in particular medium-density fiberboard, by applying a substance to the surface of a hardened fiberboard as the starting material and then applying the fiberboard with the substance in a short-cycle press of pressure and heat and using a structured press plate.
  • a structured press plate It is known to equip or equip fiberboard in the surface so that the surface does not appear as a flat surface, but has a certain structure, which can have very different shapes depending on the requirements.
  • Such structured surfaces are particularly needed in furniture manufacturing. For example, in the production of kitchen fronts, but also in the carcass area, fiberboard and other panels made of wood material can be used where a relief-like, structured surface is desired.
  • the present invention is concerned with the attachment of a structure to the surface of a fiberboard which has already hardened and which has therefore already gone through the usual manufacturing process.
  • melamine-resin-coated papers are placed on the fiberboard, particle board and the like after they have hardened, and the plate is pressed as a starting material with the melamine-resin-coated paper in a short-cycle press.
  • a short-cycle press is understood to be a known type of press with which pressures of up to about 27 kp / qcm and temperature applications of up to about 180 ° C. are usually used.
  • a structured press plate is placed on the paper layer and this results in an impression of the structure of the press plate in the area of the paper, that is to say on the surface of the fiberboard. If smooth press plates are used this results high-gloss flat surfaces.
  • the structure practically only covers the surface in the melamine-resin-coated paper, which is placed as a substance on the starting material.
  • the actual surface of the fibreboard is only slightly or hardly deformed.
  • this structure is created on the surface of the fiberboard.
  • the advantage of this known method is that the surface of the fiberboard is given some protection by the melamine paper. By curing the melamine resin, the surface of the paper is sealed or closed, as it were.
  • the known method can be carried out comparatively inexpensively, so that it can compete with a coating application in terms of expenditure.
  • the decorative structures that can be produced are disadvantageously satisfactory only for subordinate claims.
  • the paper surface usually remains recognizable, so that, for example, the structure of natural wood cannot be produced in this way, or only very incompletely. For this reason, this method is used to refine such surfaces of fiberboard, which are mostly used only in the body area of furniture, but not in the front area.
  • a hardened particle board is used as the starting material, which is particularly soft.
  • This hardened chipboard is pressed and crushed in its surface by applying pressure and heat, whereby macro structures, that is, circumferential grooves, grooves, reliefs and. Like. Can be stamped into the surface. Temperatures up to about 180 ° C are used. The depth of the embossed grooves can be up to 8 mm. Films and papers can also be melted onto the surface. Subsequent paint treatment of such deformed surfaces is also possible afterwards.
  • a milling process for producing the relief is advantageous with this known method avoided, although a similar optical effect occurs. Disadvantageously, presses must be available for this process, the working pressures of which are very high.
  • the method is only suitable and applicable for certain particularly soft wood chipboards.
  • the invention is based on the object of demonstrating a method by which it is possible, using known systems, in particular short-cycle presses, to introduce a structure, in particular a wooden structure, directly into the surface of a fiberboard, in particular a medium-density fiberboard.
  • a resin-water mixture is used as the substance. It is no longer a melamine-resin-coated paper that is applied to the surface of the fiberboard, but a resin-water mixture.
  • This resin-water mixture softens penetrates into the surface of the fully cured fiberboard, so that the structure of the press plate can be molded in this surface during the subsequent pressing in the short-cycle press.
  • the resin portion of the resin-water mixture hardens while the water portion evaporates. This means that the structure is applied in the surface and not only on the surface or on the surface, which is essential for a better decorative appearance.
  • the surface of the fiberboard is immediately deformed because the structure is stamped into it. A disruptive layer of paper or a film on the surface is eliminated.
  • Such disruptive media such as in particular papers, films and. The like. are saved, which also means a cheaper manufacturing process.
  • Another advantage lies in the fact that the tools for the further processing of the plates finished in this way in the surface become blunt less quickly and therefore result in a longer service life.
  • edge milling from Surfaces which have been produced using a melamine-resin-coated paper are known to dull the milling cutters very quickly at the point at which the paper has to be removed by the milling process.
  • milling is carried out directly in the material of the fiberboard, so that tears at the transition between fiberboard and paper, as occur in the prior art, are avoided.
  • any necessary spatula work is saved at this point.
  • Another major advantage is that the resin from the resin-water mixture after curing, as it were, is a seal of the finished surface, which not only means protection, but also represents a saving in a subsequent painting process, because by the closed surface of the cured resin the paint consumption is lower.
  • a surface can be produced which is very difficult to distinguish from a natural wooden surface which also carries a varnish.
  • the resin content of the surface is increased by using the resin-water mixture.
  • resistance to moisture and chemicals is achieved, which is not only important for the end product, but is also advantageous for all further processing steps of the finished material up to the creation of the piece of furniture.
  • a particularly natural appearance is created because the surface of the fiberboard is embossed.
  • other structures can also be produced in this way, particularly advantageously microstructures.
  • Melamine can advantageously be used as the resin within the resin / water mixture. This sets one in the Particle board and fiberboard industry is common resin, which is not only inexpensive, but with which users already have the appropriate experience. Of course, other resins are also suitable.
  • the resin-water mixture can be used in a proportion of 25 to 50%, in particular 30% resin, i. H. 30% are, for example, resin and 70% water. From this ratio it can be seen how important the presence of water is, which changes to the vapor state due to the application of pressure and heat during the pressing. This steam also penetrates to a certain depth into the surface of the fiberboard, making it soft and deformable, so that the structures of the press plates can be reproduced accordingly.
  • Structured press plates with a roughness depth of in a range from 100 to 200 ⁇ m, in particular approximately 180 ⁇ m, are advantageously used. These structures are therefore deeper than the structures used in connection with melamine-coated papers. Of course, the depth of the structure depends on the desired effect. However, structures of natural wood can be produced very well with the specified limits.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to a process for producing a wood-like texture on the surface of, in particular, medium-density fibre boards by applying, as the starting material, a resin/water mixture to the surface of a hardened fibre board, and subsequently pressing the fibre board in a short-cycle press under the action of pressure and heat and using a textured press pattern.

Description

Die Erfindung bezieht sich auf ein Verfahren zur Erzeugung einer Struktur, insbesondere Holzstruktur, an der Oberfläche von Faserplatten, insbesondere mitteldichten Faserplatten, indem auf die Oberfläche einer ausgehärteten Faserplatte als Ausgangsmaterial ein Stoff aufgebracht wird und die Faserplatte anschließend mit dem Stoff in einer Kurztaktpresse unter Einwirkung von Druck und Hitze und unter Verwendung eines strukturierten Preßbleches verpreßt wird. Es ist bekannt, Faserplatten in der Oberfläche so auszurüsten bzw. auszustatten, daß die Oberfläche nicht als ebene Fläche erscheint, sondern eine bestimmte Struktur aufweist, die je nach den Anforderungen ganz verschiedene Gestalt besitzen kann. Solche strukturierten Oberflächen werden insbesondere in der Möbelherstellung benötigt. Beispielsweise bei der Herstellung von Küchenfronten, aber auch im Korpusbereich können und werden Faserplatten sowie andere aus Holzmaterial bestehende Platten eingesetzt, bei denen eine reliefartige, strukturierte Oberfläche gewünscht ist. Es geht bei der vorliegenden Erfindung um die Anbringung einer Struktur an der Oberfläche einer Faserplatte, die bereits ausgehärtet ist, die also bereits den üblichen Herstellungsvorgang durchlaufen hat.The invention relates to a method for producing a structure, in particular a wood structure, on the surface of fiberboard, in particular medium-density fiberboard, by applying a substance to the surface of a hardened fiberboard as the starting material and then applying the fiberboard with the substance in a short-cycle press of pressure and heat and using a structured press plate. It is known to equip or equip fiberboard in the surface so that the surface does not appear as a flat surface, but has a certain structure, which can have very different shapes depending on the requirements. Such structured surfaces are particularly needed in furniture manufacturing. For example, in the production of kitchen fronts, but also in the carcass area, fiberboard and other panels made of wood material can be used where a relief-like, structured surface is desired. The present invention is concerned with the attachment of a structure to the surface of a fiberboard which has already hardened and which has therefore already gone through the usual manufacturing process.

Bei einem bekannten Verfahren der eingangs beschriebenen Art werden auf die Faserplatte, Spanplatte und dergleichen nach ihrer Aushärtung Melamin-beharzte Papiere aufgelegt und die Platte als Ausgangsmaterial mit dem Melamin-beharzten Papier in einer Kurztaktpresse verpreßt. Unter einer Kurztaktpresse wird ein bekannter Pressentyp verstanden, mit dem üblicherweise Drücke bis zu etwa 27 kp/qcm und Temperaturanwendungen bis etwa 180° C zur Anwendung gelangen. Auf die aufgelegte Papierschicht wird ein strukturiertes Preßblech aufgelegt und auf diese Weise ergibt sich eine Abformung der Struktur des Preßbleches im Bereich des Papieres, also an der Oberfläche der Faserplatte. Wenn glatte Preßbleche Verwendung finden ergeben sich auf diese Weise hochglänzende ebene Oberflächen. Die Struktur erfaßt dabei aber praktisch nur die Oberfläche in dem Melamin-beharzten Papier, welches als Stoff auf das Ausgangsmaterial aufgelegt wird. Die eigentliche Oberfläche der Faserplatte wird dabei nur wenig oder kaum verformt. Insoweit wird diese Struktur an der Oberfläche der Faserplatte erzeugt. Der Vorteil dieses bekannten Verfahrens liegt darin, daß die Oberfläche der Faserplatte durch das Melamin-Papier einen gewissen Schutz erhält. Durch die Aushärtung des Melamin-Harzes wird die Oberfläche des Papieres gleichsam versiegelt bzw. geschlossen. Das bekannte Verfahren ist vergleichsweise preisgünstig durchführbar, so daß es vom Aufwand her mit einem Lackauftrag konkurrieren kann. In nachteiliger Weise sind die dabei erzeugbaren Strukturen in dekorativer Hinsicht nur für untergeordnete Ansprüche befriedigend. Die Papieroberfläche bleibt meist erkennbar, so daß beispielsweise die Struktur von natürlichem Holz auf diese Art und Weise nicht oder nur sehr unvollkommen herstellbar ist. Aus diesem Grund findet dieses Verfahren zur Veredelung vom solchen Oberflächen von Faserplatten Verwendung, die meist nur im Korpusbereich von Möbeln, nicht aber im Frontbereich, eingesetzt werden.In a known method of the type described in the introduction, melamine-resin-coated papers are placed on the fiberboard, particle board and the like after they have hardened, and the plate is pressed as a starting material with the melamine-resin-coated paper in a short-cycle press. A short-cycle press is understood to be a known type of press with which pressures of up to about 27 kp / qcm and temperature applications of up to about 180 ° C. are usually used. A structured press plate is placed on the paper layer and this results in an impression of the structure of the press plate in the area of the paper, that is to say on the surface of the fiberboard. If smooth press plates are used this results high-gloss flat surfaces. However, the structure practically only covers the surface in the melamine-resin-coated paper, which is placed as a substance on the starting material. The actual surface of the fibreboard is only slightly or hardly deformed. In this respect, this structure is created on the surface of the fiberboard. The advantage of this known method is that the surface of the fiberboard is given some protection by the melamine paper. By curing the melamine resin, the surface of the paper is sealed or closed, as it were. The known method can be carried out comparatively inexpensively, so that it can compete with a coating application in terms of expenditure. The decorative structures that can be produced are disadvantageously satisfactory only for subordinate claims. The paper surface usually remains recognizable, so that, for example, the structure of natural wood cannot be produced in this way, or only very incompletely. For this reason, this method is used to refine such surfaces of fiberboard, which are mostly used only in the body area of furniture, but not in the front area.

Es gibt auch bereits Verfahren, die sich wie das anmeldungsgemäße Verfahren, mit der Anbringung einer Struktur unmittelbar in der Oberfläche einer Faserplatte beschäftigen. Dabei werden Faserplatten zunächst nach dem üblichen bekannten Verfahren hergestellt. Dann werden diese Platten vermittels eines Prägekalanders behandelt, dessen Prägewalzen ein- oder beiseitig strukturiert sind. Unter Anwendung von Druck und Hitze wird die Struktur gleichsam in die Oberfläche der Faserplatte eingebrannt. Die anzuwendenden Temperaturen können bis etwa 1100° C an der Oberfläche der Prägewalzen erreichen. Durch Variation von Druck, Hitze und Vorschubgeschwindigkeit der zu veredelnden Faserplatte durch den Prägekalander kann die Farbe der eingebrannten Struktur variiert werden. Vorteilhaft ist es mit diesem Verfahren möglich, überhaupt einmal eine Struktur in der Oberfläche und nicht etwa nur an der Oberfläche einer Faserplatte zu bekommen. Es entfällt auch die zusätzliche Verwendung eines Stoffes, beispielsweise eines melaminharzgetränkten Papieres. Nachteilig an diesem Verfahren ist, daß die Einbrenn-­Verfärbung nicht immer gleichmäßig ausfällt. Auch ergibt sich kein zufriedenstellendes Aussehen, wenn eine natürlich Holzstruktur nachgeahmt werden soll. Die Oberfläche der Faserplatten ist auch nach dem Einbrennen roh und ungeschützt. Es können insbesondere Feuchtigkeitsschäden und mechanische Schäden bei nachfolgenden Bearbeitungsschritten auftreten, die auch durch einen Schleifvorgang nicht beseitigt werden können, weil hierdurch zugleich die eingebrannte Oberfläche so verändert würde, daß die Schadensstellen noch deutlicher hervortreten und erkennbar sind. Nachteilig ist auch, daß für eine solche Veredelung von Faserplatten spezielle Anlagen und Prägekalander erforderlich sind und die Steuerung der Temperatur und des Druckes äußerst präzise durchgeführt werden müssen, wenn das Arbeitsergebnis einigermaßen konstant sein soll.There are also methods which, like the method according to the application, deal with the attachment of a structure directly in the surface of a fiberboard. In this case, fiberboard is first produced using the usual known method. Then these plates are treated by means of an embossing calender, the embossing rollers of which are structured on one or both sides. The structure is burned into the surface of the fiberboard using pressure and heat. The temperatures to be used can reach up to about 1100 ° C on the surface of the embossing rollers. The color of the burned-in structure can be varied by varying the pressure, heat and feed rate of the fibreboard to be finished through the embossing calender can be varied. With this method it is advantageously possible to get a structure in the surface at all and not just on the surface of a fiberboard. There is also no additional use of a substance, for example a paper soaked in melamine resin. A disadvantage of this process is that the stoving discoloration is not always uniform. There is also no satisfactory appearance if a natural wood structure is to be imitated. The surface of the fiberboard is raw and unprotected even after baking. In particular, moisture damage and mechanical damage can occur in subsequent processing steps, which cannot be removed even by a grinding process, because this would also change the baked surface in such a way that the damage points emerge even more clearly and are recognizable. It is also disadvantageous that special systems and embossing calenders are required for such a refinement of fiberboard and the control of the temperature and the pressure must be carried out extremely precisely if the work result is to be reasonably constant.

Bei einem weiteren bekannten Verfahren, welches insbesondere zur Herstellung von Möbelfronten dient, wird als Ausgangsmaterial eine ausgehärtete Spanplatte eingesetzt, die besonderes weich ausgebildet ist. Diese ausgehärtete Spanplatte wird in ihrer Oberfläche durch Anwendung von Druck und Hitze eingedrückt und zerdrückt, wobei Makro-Strukturen, also umlaufende Nuten, Rillen, Reliefs u. dgl. in die Oberläche eingeprägt werden können. Dabei werden Temperaturen bis etwa 180° C angewandt. Die Tiefe der eingeprägten Nuten kann bis zu 8 mm betragen. Es können auch Folien und Papiere auf die Oberfläche aufgeschmolzen werden. Auch eine nachfolgende Lackbehandlung derart verformter Oberflächen ist nachträglich möglich. Vorteilhaft wird mit diesem bekannten Verfahren ein Fräsvorgang zur Herstellung des Reliefs vermieden, wobei durchaus ein ähnlicher optischer Effekt auftritt. In nachteiliger Weise müssen für dieses Verfahren Pressen zur Verfügung stehen, deren Arbeitsdrücke sehr hoch sind. Außerdem ist das Verfahren nur für bestimmte besonders weich gestaltete Holzspanplatten geeignet und anwendbar.In another known method, which is used in particular for the production of furniture fronts, a hardened particle board is used as the starting material, which is particularly soft. This hardened chipboard is pressed and crushed in its surface by applying pressure and heat, whereby macro structures, that is, circumferential grooves, grooves, reliefs and. Like. Can be stamped into the surface. Temperatures up to about 180 ° C are used. The depth of the embossed grooves can be up to 8 mm. Films and papers can also be melted onto the surface. Subsequent paint treatment of such deformed surfaces is also possible afterwards. A milling process for producing the relief is advantageous with this known method avoided, although a similar optical effect occurs. Disadvantageously, presses must be available for this process, the working pressures of which are very high. In addition, the method is only suitable and applicable for certain particularly soft wood chipboards.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren aufzuzeigen, mit dem es möglich ist, unter Verwendung bekannter Anlagen, insbesondere Kurztaktpressen, eine Struktur, insbesondere Holzstruktur, direkt in die Oberfläche einer Faserplatte, insbesondere einer mitteldichten Faserplatte, einzubringen.The invention is based on the object of demonstrating a method by which it is possible, using known systems, in particular short-cycle presses, to introduce a structure, in particular a wooden structure, directly into the surface of a fiberboard, in particular a medium-density fiberboard.

Erfindungsgemäß wird dies dadurch erreicht, daß als Stoff ein Harz-Wassergemisch Verwendung findet. Es wird also nicht mehr ein Melamin-beharztes Papier als Stoff auf die Oberfläche der Faserplatte aufgebracht, sondern ein Harz-Wassergemisch. Dieses Harz-Wassergemisch dringt erweichend in die Oberfläche der fertig ausgehärteten Faserplatte ein, so daß sich bei der nachfolgenden Verpressung in der Kurztaktpresse die Struktur des Preßbleches in dieser Oberfläche abformen kann. Dabei härtet der Harzanteil des Harz-Wassergemisches aus, während der Wasseranteil verdampft. Damit wird die Struktur in der Oberfläche und nicht nur an der Oberfläche bzw. auf die Oberfläche aufgebracht, was grundlegend für ein besseres dekoratives Aussehen ist. Es wird unmittelbar die Oberfläche der Faserplatte verformt, weil die Struktur hier hineingeprägt wird. Eine störende Papierschicht oder eine Folie an der Oberfläche kommen in Fortfall. Derartige störende Medien, wie insbesondere Papiere, Folien u. dgl. werden eingespart, was zugleich eine Verbilligung des Herstellungsvorganges bedeutet. Ein weiterer Vorteil liegt darin, daß die Werkzeuge für die Weiterbearbeitung der auf diese Art und Weise in der Oberfläche veredelten Platten weniger schnell stumpf werden und daher eine längere Standzeit ergeben. Insbesondere beim Kantenfräsen von Oberflächen, die unter Verwendung eines Melamin-beharzten Papieres hergestellt wurden, werden die Fräser an der Stelle, an der das Papier durch den Fräsvorgang abgetragen werden muß, bekanntlich sehr schnell stumpf. Beim Fräsvorgang der nach dem neuen Verfahren veredelten Faserplatte, insbesondere beim Fräsen einer abgerundeten Kante, wird direkt in dem Material der Faserplatte gefräst, so daß Einrißstellen am Übergang zwischen Faserplatte und Papier, wie sie im Stand der Technik vorkommen, vermieden werden. Natürlich werden auch im Stand der Technik erforderlich werdende Spachtelarbeiten an dieser Stelle eingespart. Ein weiterer wesentlicher Vorteil ist darin zu sehen, daß das Harz aus dem Harz-Wassergemisch nach dem Aushärten gleichsam eine Versiegelung der veredelten Oberfläche darstellt, die nicht nur einen Schutz bedeutet, sondern auch eine Einsparung bei einem sich meist anschließenden Lackierungsvorgang darstellt, weil durch die geschlossene Oberfläche des ausgehärteten Harzes der Lackverbrauch geringer ist. Insbesondere mit einer Lackierung kann überraschenderweise eine Oberfläche erzeugt werden, die von einer natürlichen Holzoberfläche, die ebenfalls eine Lackierung trägt, nur sehr schwer unterscheidbar ist. Durch die Anwendung des Harz-­Wassergemisches wird der Harzanteil der Oberfläche erhöht. Gleichzeitig wird damit eine Resistenz gegen Feuchtigkeit und Chemikalien erreicht, die nicht nur Bedeutung für das Endprodukt hat, sondern sich auch bereits vorteilhaft für alle Weiterverarbeitungsschritte des veredelten Materials bis zur Erstellung des Möbelstückes besitzt. Bei Verwendung einer Holzstruktur entsteht ein besonders natürliches Aussehen, weil in die Oberfläche der Faserplatte hineingeprägt wird. Natürlich können auch andere Strukturen auf diese Art und Weise hergestellt werden, besonders vorteilhaft Mikro-­Strukturen.According to the invention, this is achieved in that a resin-water mixture is used as the substance. It is no longer a melamine-resin-coated paper that is applied to the surface of the fiberboard, but a resin-water mixture. This resin-water mixture softens penetrates into the surface of the fully cured fiberboard, so that the structure of the press plate can be molded in this surface during the subsequent pressing in the short-cycle press. The resin portion of the resin-water mixture hardens while the water portion evaporates. This means that the structure is applied in the surface and not only on the surface or on the surface, which is essential for a better decorative appearance. The surface of the fiberboard is immediately deformed because the structure is stamped into it. A disruptive layer of paper or a film on the surface is eliminated. Such disruptive media, such as in particular papers, films and. The like. Are saved, which also means a cheaper manufacturing process. Another advantage lies in the fact that the tools for the further processing of the plates finished in this way in the surface become blunt less quickly and therefore result in a longer service life. Especially when edge milling from Surfaces which have been produced using a melamine-resin-coated paper are known to dull the milling cutters very quickly at the point at which the paper has to be removed by the milling process. During the milling process of the fibreboard refined according to the new method, in particular when milling a rounded edge, milling is carried out directly in the material of the fiberboard, so that tears at the transition between fiberboard and paper, as occur in the prior art, are avoided. Of course, in the prior art, any necessary spatula work is saved at this point. Another major advantage is that the resin from the resin-water mixture after curing, as it were, is a seal of the finished surface, which not only means protection, but also represents a saving in a subsequent painting process, because by the closed surface of the cured resin the paint consumption is lower. Surprisingly, in particular with a varnish, a surface can be produced which is very difficult to distinguish from a natural wooden surface which also carries a varnish. The resin content of the surface is increased by using the resin-water mixture. At the same time, resistance to moisture and chemicals is achieved, which is not only important for the end product, but is also advantageous for all further processing steps of the finished material up to the creation of the piece of furniture. When using a wooden structure, a particularly natural appearance is created because the surface of the fiberboard is embossed. Of course, other structures can also be produced in this way, particularly advantageously microstructures.

Als Harz innerhalb des Harz-Wassergemisches kann vorteilhaft Melamin Verwendung finden. Dies stellt ein in der Spanplatten- und Faserplattenindustrie übliches Harz dar, welches nicht nur preiswert ist, sondern mit dem auch bereits die Anwender entsprechende Erfahrungen haben. Aber auch andere Harze sind natürlich geeignet.Melamine can advantageously be used as the resin within the resin / water mixture. This sets one in the Particle board and fiberboard industry is common resin, which is not only inexpensive, but with which users already have the appropriate experience. Of course, other resins are also suitable.

Das Harz-Wassergemisch kann mit einem Anteil von 25 bis 50%, insbesondere 30% Harz Anwendung finden, d. h. 30% sind bespielsweise Harz und 70% Wasser. Aus diesem Verhältnis wird erkennbar, wie wichtig die Anwesenheit von Wasser ist, die durch die Anwendung von Druck und Hitze während des Verpressens in den dampfförmigen Zustand übergeht. Auch dieser Dampf dringt bis zu einer gewissen Tiefe in die Oberfläche der Faserplatte ein, mach sie weich und verformbar, so daß sich die Strukturen der Preßbleche entsprechend abbilden können.The resin-water mixture can be used in a proportion of 25 to 50%, in particular 30% resin, i. H. 30% are, for example, resin and 70% water. From this ratio it can be seen how important the presence of water is, which changes to the vapor state due to the application of pressure and heat during the pressing. This steam also penetrates to a certain depth into the surface of the fiberboard, making it soft and deformable, so that the structures of the press plates can be reproduced accordingly.

Vorteilhaft werden strukturierte Preßbleche mit einer Rauhigkeitstiefe von in einem Bereich von 100 bis 200µ, insbesondere etwa 180µ, eingesetzt. Diese Strukturen sind also tiefer als die Strukturen die in Verbindung mit Melamin-­beharzten Papieren Verwendung finden. Natürlich richtet sich die Tiefe der Struktur nach dem gewünschten Effekt. Bereits aber mit den angegebenen Grenzen lassen sich Strukturen von natürlichem Holz sehr gut erzeugen.Structured press plates with a roughness depth of in a range from 100 to 200 μm, in particular approximately 180 μm, are advantageously used. These structures are therefore deeper than the structures used in connection with melamine-coated papers. Of course, the depth of the structure depends on the desired effect. However, structures of natural wood can be produced very well with the specified limits.

Beim Verpressen der mit dem Harz-Wassergemisch benetzten Oberfläche können Drücke zwischen 20 und 30 kp/qcm und Temperaturen zwischen 150 und 200° C in der Oberfläche der Preßbleche angewendet werden. Vorteilhaft läßt sich das Veredelungsverfahren sowohl einseitig als auch beidseitig an Faserplatten einsetzen. Auch bei einseitiger Anwendung verlieren die Platten nicht ihre Geradheit, was insoweit einen Vorteil gegenüber der Veredelung mit Melamin-beharzten Papieren darstellt, die immer beidseitig angewendet werden müssen, damit die Faserplatten nicht krumm werden.When pressing the surface wetted with the resin-water mixture, pressures between 20 and 30 kp / qcm and temperatures between 150 and 200 ° C in the surface of the press plates can be used. The finishing process can advantageously be used both on one side and on both sides of fiberboard. Even when used on one side, the boards do not lose their straightness, which is an advantage over finishing with melamine-coated papers, which must always be used on both sides so that the fiberboard does not become crooked.

Es hat sich als vorteilhaft erwiesen, die Oberfläche der Faserplatten mit etwa 20 bis 40 g/qm Harz-Wassergemisch zu benetzen. Bereits dieser geringe flächenmäßige Anteil reicht aus, um die gewünschte strukturierte Oberfläche zu erzielen.It has proven to be advantageous to wet the surface of the fiberboard with about 20 to 40 g / m 2 resin-water mixture. Even this small area is sufficient to achieve the desired structured surface.

Claims (6)

1. Verfahren zur Erzeugung einer Struktur, insbesondere Holzstruktur, in die Oberfläche einer ausgehärteten Faserplatte, insbesondere mitteldichten Faserplatte, hinein, in dem ein- oder beidseitig auf die Oberfläche der Faserplatte ein Harz-Wassergemisch aufgebracht wird, welches erweichend in die Oberfläche der Faserplatte eindringt, und die Faserplatte anschließend mit einer Kurztaktpresse unter Einwirkung von Druck und Hitze und unter Verwendung eines strukturierten Preßblechs verpreßt wird, wobei der Wasseranteil des Harz-Wassergemischs zum Verdampfen und der Harzanteil zur Aushärtung gebracht werden, während die Struktur des Preßblechs unmittelbar in die Oberfläche der Faserplatte hinein abgeformt wird.1. A process for producing a structure, in particular a wood structure, into the surface of a hardened fiberboard, in particular medium-density fiberboard, in which a resin-water mixture is applied to the surface of the fiberboard on one or both sides and which penetrates into the surface of the fiberboard in a softening manner , and the fiberboard is then pressed with a short-cycle press under the action of pressure and heat and using a structured press plate, whereby the water portion of the resin-water mixture is evaporated and the resin portion is hardened, while the structure of the press plate is directly in the surface of the Fibreboard is molded into it. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Harz Melamin Verwendung findet.2. The method according to claim 1, characterized in that melamine is used as the resin. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Harz-Wassergemisch mit einem Anteil von 25 bis 50%, insbesondere 30% Harz Anwendung findet.3. The method according to claim 1 or 2, characterized in that the resin-water mixture with a proportion of 25 to 50%, in particular 30% resin is used. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß strukturierte Preßbleche mit einer Rauhigkeitstiefe in einem Bereich von 100 bis 200µ, insbesondere etwa 180µ, eingesetzt werden.4. The method according to claim 1, characterized in that structured press plates with a roughness depth in a range from 100 to 200µ, in particular about 180µ, are used. 5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß beim Verpressen der mit dem Harz-Wassergemisch benetzten Oberfläche Drücke zwischen 20 und 30 kp/qcm und Temperaturen zwischen 150 und 200° C in der Oberfläche der Preßbleche angewendet werden.5. The method according to claim 1, characterized in that when pressing the surface wetted with the resin-water mixture, pressures between 20 and 30 kp / qcm and temperatures between 150 and 200 ° C in the surface of the press plates are used. 6. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Oberfläche der Faserplatte mit etwa 20 bis 40 g/qm Harz-­Wassergemisch benetzt wird.6. The method according to claim 1, characterized in that the surface of the fiberboard is wetted with about 20 to 40 g / m² resin-water mixture.
EP89121478A 1988-11-30 1989-11-21 Method for producing a texture, particularly a wood-like texture, in the surface of a hardened fibre board Expired - Lifetime EP0371371B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3840292A DE3840292A1 (en) 1988-11-30 1988-11-30 METHOD FOR GENERATING A STRUCTURE, IN PARTICULAR WOOD STRUCTURE, ON THE SURFACE OF FIBER PANELS
DE3840292 1988-11-30

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EP0371371A2 true EP0371371A2 (en) 1990-06-06
EP0371371A3 EP0371371A3 (en) 1991-12-04
EP0371371B1 EP0371371B1 (en) 1995-05-17

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EP89121478A Expired - Lifetime EP0371371B1 (en) 1988-11-30 1989-11-21 Method for producing a texture, particularly a wood-like texture, in the surface of a hardened fibre board

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US (1) US5008057A (en)
EP (1) EP0371371B1 (en)
AT (1) ATE122596T1 (en)
CA (1) CA2004182A1 (en)
DE (1) DE3840292A1 (en)
ES (1) ES2072884T3 (en)

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EP0548758A1 (en) * 1991-12-20 1993-06-30 Bison-Werke Bähre & Greten GmbH & Co. KG Board and method to manufacture it
EP0553420A1 (en) * 1992-01-28 1993-08-04 Glunz Ag MNF-board and method for its manufacture
EP0710533A1 (en) * 1994-11-02 1996-05-08 Houthandel Lambert Van Den Bosch B.V. Method, device and relief roller for applying a pattern to a surface of a fibreboard
DE19718770A1 (en) * 1997-05-03 1998-11-05 Dieffenbacher Gmbh Maschf Procedure for manufacture of structured surfaces of cold derived timber product board
DE19718771A1 (en) * 1997-05-03 1998-11-05 Dieffenbacher Gmbh Maschf Procedure for manufacture of derived timber product board, such as chip board and fibre board
DE19812523A1 (en) * 1998-03-21 1999-11-18 Schenck Panel Production Syste Surface structuring method for panels of derived timber products
DE10017581C1 (en) * 2000-04-08 2001-10-18 Valmet Corp Process and plant for the production of chipboard or similar board materials
DE19749849B4 (en) * 1997-11-11 2005-02-03 Kvaerner Panel Systems Gmbh Maschinen- Und Anlagenbau Process and plant for the production of single-sided surface-structured, plate-shaped composite materials
EP2562003A3 (en) * 2007-05-27 2013-06-19 Thomas Schneider Planar element and method for the production thereof

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GB2324061B (en) * 1997-04-10 2002-05-08 Findlay Alice Rosemary A moulded door skin
GB2367783B (en) * 1997-04-10 2002-05-29 Mdf Inc Method of manufacturing a molded door skin from a wood composite
US6689301B1 (en) 1997-04-10 2004-02-10 Mdf, Inc. Method of manufacturing a molded door skin from a wood composite, door skin produced therefrom, and door manufactured therewith
GB2364343B (en) * 1997-04-10 2002-05-08 Mdf Inc A door
EP0916460A1 (en) * 1997-11-17 1999-05-19 Lindauer Dornier Gesellschaft M.B.H Method for cooling of hot pressed boards, especially particle boards and fibreboards, and plant for carrying out the process
GB2340060B (en) * 1998-07-29 2003-08-13 Mdf Inc Method of manufacturing a molded door skin from a flat wood composite, door skin produced therefrom and door manufactured therewith
US6764625B2 (en) * 2002-03-06 2004-07-20 Masonite Corporation Method of producing core component, and product thereof
DE10252863B4 (en) * 2002-11-12 2007-04-19 Kronotec Ag Wood fiber board, in particular floor panel
PL2349663T3 (en) 2008-10-21 2017-10-31 Uniboard Canada Inc Embossed monolayer particleboards and methods of preparation thereof
ES2351131B1 (en) * 2009-07-15 2011-11-21 Guadalupe Sanchez Manzanares PROCEDURE FOR MARKING AND TEXTURIZATION OF DECORATIVE SURFACES.
DE102010046503A1 (en) 2010-09-24 2012-03-29 Homatherm Ag Process for producing a surface-reinforced wood-based panel

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EP0548758A1 (en) * 1991-12-20 1993-06-30 Bison-Werke Bähre & Greten GmbH & Co. KG Board and method to manufacture it
EP0553420A1 (en) * 1992-01-28 1993-08-04 Glunz Ag MNF-board and method for its manufacture
EP0710533A1 (en) * 1994-11-02 1996-05-08 Houthandel Lambert Van Den Bosch B.V. Method, device and relief roller for applying a pattern to a surface of a fibreboard
DE19718770A1 (en) * 1997-05-03 1998-11-05 Dieffenbacher Gmbh Maschf Procedure for manufacture of structured surfaces of cold derived timber product board
DE19718771A1 (en) * 1997-05-03 1998-11-05 Dieffenbacher Gmbh Maschf Procedure for manufacture of derived timber product board, such as chip board and fibre board
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DE19749849B4 (en) * 1997-11-11 2005-02-03 Kvaerner Panel Systems Gmbh Maschinen- Und Anlagenbau Process and plant for the production of single-sided surface-structured, plate-shaped composite materials
DE19812523A1 (en) * 1998-03-21 1999-11-18 Schenck Panel Production Syste Surface structuring method for panels of derived timber products
DE10017581C1 (en) * 2000-04-08 2001-10-18 Valmet Corp Process and plant for the production of chipboard or similar board materials
EP2562003A3 (en) * 2007-05-27 2013-06-19 Thomas Schneider Planar element and method for the production thereof

Also Published As

Publication number Publication date
EP0371371B1 (en) 1995-05-17
CA2004182A1 (en) 1990-05-31
DE3840292A1 (en) 1990-05-31
US5008057A (en) 1991-04-16
ES2072884T3 (en) 1995-08-01
ATE122596T1 (en) 1995-06-15
DE3840292C2 (en) 1991-02-28
EP0371371A3 (en) 1991-12-04

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