EP0371371B1 - 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 PDFInfo
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- EP0371371B1 EP0371371B1 EP89121478A EP89121478A EP0371371B1 EP 0371371 B1 EP0371371 B1 EP 0371371B1 EP 89121478 A EP89121478 A EP 89121478A EP 89121478 A EP89121478 A EP 89121478A EP 0371371 B1 EP0371371 B1 EP 0371371B1
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- Prior art keywords
- resin
- fiberboard
- fibreboard
- texture
- pressure
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- 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
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- 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
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- 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 wooden 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 on the starting material as a substance.
- the actual surface of the fiberboard is only slightly or hardly deformed. To this extent, 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 is comparatively inexpensive to carry out, so that it can compete with a coating application in terms of effort.
- the decorative structures that can be produced are disadvantageously satisfactory only for subordinate claims.
- the paper surface usually remains recognizable, so that the structure of natural wood, for example, cannot be produced in this way or can only be produced very incompletely. For this reason, this process 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 of 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 with 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 fundamental 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 reduction in the cost of the 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 Surfaces that were produced using a melamine-resin-coated paper are known to dull the 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.
- Melamine can advantageously be used as the resin within the resin / water mixture. This sets in Particle board and fibreboard industry is common resin, which is not only inexpensive, but with which the 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% is 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 » in particular approximately 180 » 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
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 wooden 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 on the starting material as a substance. The actual surface of the fiberboard is only slightly or hardly deformed. To this extent, 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 is comparatively inexpensive to carry out, so that it can compete with a coating application in terms of effort. The decorative structures that can be produced are disadvantageously satisfactory only for subordinate claims. The paper surface usually remains recognizable, so that the structure of natural wood, for example, cannot be produced in this way or can only be produced very incompletely. For this reason, this process 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.
Aus der US 4 073 672 ist es bekannt, die Oberflächen von fertig ausgehärteten Hartfaserplatten, Spanplatten u. dgl. mit einer Chemikalie zu präparieren, um nachfolgend Strukturen in diese Oberfläche einformen zu können. Als geeignete Chemikalien werden Salzsäure, Schwefelsäure, Salpetersäure und Phosphorsäure genannt. Als organische Säure wird Oxalsäure genannt. Wichtig ist es dabei, daß die Oberfläche der Platte mit dieser speziellen Chemikalie durchnäßt wird. Bei dem nachfolgenden Abformen einer Struktur muß ein zusammendrückbares Kissen oder eine Rückenplatte aus beispielsweise Gummi, Schaumgummi o. dgl. eingesetzt werden, also einer Platte, die zugleich wasserdurchlässig ist. Die eingesetzten Säuren werden in wässriger Lösung eingesetzt.From US 4 073 672 it is known that the surfaces of fully cured hardboard, chipboard and the like. To be prepared with a chemical in order to subsequently mold structures into this surface. Hydrochloric acid, sulfuric acid, nitric acid and phosphoric acid are mentioned as suitable chemicals. Oxalic acid is mentioned as the organic acid. It is important that the surface of the plate is wetted with this special chemical. In the subsequent molding of a structure, a compressible cushion or a back plate made of, for example, rubber, foam rubber or the like must be used, that is to say a plate which is at the same time permeable to water. The acids used are used in aqueous solution.
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 customary 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 approximately 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 refined 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 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 of 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 with 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 fundamental 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 reduction in the cost of the 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 Surfaces that were produced using a melamine-resin-coated paper are known to dull the 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 significant advantage is the fact 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, it is possible to produce a surface which is very difficult to distinguish from a natural wood 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 wood structure, a particularly natural appearance is created because the surface of the fibreboard 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 in Particle board and fibreboard industry is common resin, which is not only inexpensive, but with which the 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. For example, 30% is 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 200», insbesondere etwa 180», 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 », in particular approximately 180», 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)
- A method for producing a structure, especially a wooden structure, in a surface of a hardened fibreboard, especially a medium-density fibreboard, comprising the steps of :
applying a resin-water mix to the surface of the fibreboard on one or both sides to soften and penetrate into the surface of the fibreboard; and pressing the fibreboard with a short-cycle press, under the action of pressure and heat, and using a structured pressure-plate; the water-part of the resin-water mix being caused to evaporate and the resin-part to cure, whereas the structure of the pressure-plate is moulded into the surface of the fibreboard. - A method according to claim 1, wherein the resin used is a melamine.
- A method according to claim 1 or 2, wherein the resin-water mix contains between 25 and 50 %, more particulary 30 %, of resin.
- A method according to claim 1, wherein the structured pressure-plate is used with a roughness-depth of between 100 and 200 », preferably about 180 ».
- A method according to claim 1, wherein in pressing the surface wetted with the resin-water mix, pressures of between 20 and 30 kp/cm² and temperatures of between 150 and 200°C at the surface of the pressure-plate are used.
- A method according to claim 1, wherein the surface of the fibreboard is wetted with about 20 to 40 g/m² of the resin-water mix.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3840292 | 1988-11-30 | ||
| DE3840292A DE3840292A1 (en) | 1988-11-30 | 1988-11-30 | METHOD FOR GENERATING A STRUCTURE, IN PARTICULAR WOOD STRUCTURE, ON THE SURFACE OF FIBER PANELS |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0371371A2 EP0371371A2 (en) | 1990-06-06 |
| EP0371371A3 EP0371371A3 (en) | 1991-12-04 |
| EP0371371B1 true EP0371371B1 (en) | 1995-05-17 |
Family
ID=6368137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5008057A (en) |
| EP (1) | EP0371371B1 (en) |
| AT (1) | ATE122596T1 (en) |
| CA (1) | CA2004182A1 (en) |
| DE (1) | DE3840292A1 (en) |
| ES (1) | ES2072884T3 (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4142438A1 (en) * | 1991-12-20 | 1993-06-24 | Baehre & Greten | PLATE AND METHOD FOR THE PRODUCTION THEREOF |
| DE4202190C1 (en) * | 1992-01-28 | 1993-07-15 | Glunz Ag, 4700 Hamm, De | |
| NL9401818A (en) * | 1994-11-02 | 1996-06-03 | Houthandel Lambert Van Den Bos | Method, device and embossing roller to pattern a fiberboard surface. |
| 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 |
| GB2364269B (en) * | 1997-04-10 | 2002-05-29 | Mdf Inc | Method of manufacturing a molded door skin from a wood composite |
| GB2324061B (en) * | 1997-04-10 | 2002-05-08 | Findlay Alice Rosemary | A moulded door skin |
| 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 |
| DE19718770A1 (en) * | 1997-05-03 | 1998-11-05 | Dieffenbacher Gmbh Maschf | Procedure for manufacture of structured surfaces of cold derived timber product board |
| 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 |
| 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 |
| DE19812523A1 (en) * | 1998-03-21 | 1999-11-18 | Schenck Panel Production Syste | Surface structuring method for panels of derived timber products |
| 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 |
| DE10017581C1 (en) * | 2000-04-08 | 2001-10-18 | Valmet Corp | Process and plant for the production of chipboard or similar board materials |
| US6764625B2 (en) * | 2002-03-06 | 2004-07-20 | Masonite Corporation | Method of producing core component, and product thereof |
| DE10262235B4 (en) * | 2002-11-12 | 2010-05-12 | Kronotec Ag | Particle board, in particular floor panel or furniture panel, and method for its production |
| DE202008018559U1 (en) * | 2007-05-27 | 2015-11-13 | Thomas Schneider | Flat element |
| CA2721390C (en) * | 2008-10-21 | 2012-04-03 | 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 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE895524C (en) * | 1951-09-13 | 1953-11-02 | Basf Ag | Process for finishing the surfaces of cardboard, wood fiber, chipboard and plywood panels and the like. Like. Flat fiber products |
| US2803188A (en) * | 1954-09-28 | 1957-08-20 | Wood Conversion Co | Production of embossed porous coated porous fiberboard |
| US4007076A (en) * | 1974-12-30 | 1977-02-08 | Masonite Corporation | Post-press embossing of a consolidated man-made board |
| AT351744B (en) * | 1976-04-09 | 1979-08-10 | Oesterr Hiag Werke Ag | WOOD CHIPBOARD WITH A SCRATCH-RESISTANT, PREFERABLY DECORATIVE COVER AND PROCESS FOR THEIR MANUFACTURING |
| AT342872B (en) * | 1976-05-03 | 1978-04-25 | Oesterr Hiag Werke Ag | WOODEN CHIPBOARD WITH A COATING LAYER OF MELAMINE RESIN ON AT LEAST ONE SIDE AND A METHOD FOR MANUFACTURING SUCH A PANEL |
| US4275027A (en) * | 1977-07-28 | 1981-06-23 | Masonite Corporation | Post-press molding of man-made boards to produce contoured furniture parts |
| JPS55123447A (en) * | 1979-03-16 | 1980-09-22 | Daiken Trade & Ind Co Ltd | Method for production of decorative laminated board |
| CA1129265A (en) * | 1979-04-30 | 1982-08-10 | Otto Kopp | Substrates impregnated with thermosetting synthetic resins and a process for the preparation thereof |
| US4237087A (en) * | 1979-10-05 | 1980-12-02 | Armstrong Cork Company | Method of embossing wood composition board |
| DD256478A1 (en) * | 1987-01-22 | 1988-05-11 | Wtz Holzverarbeitende Ind | METHOD FOR PRODUCING PROFILED SURFACES ON WOODEN MATERIAL PANELS |
-
1988
- 1988-11-30 DE DE3840292A patent/DE3840292A1/en active Granted
-
1989
- 1989-11-21 AT AT89121478T patent/ATE122596T1/en active
- 1989-11-21 ES ES89121478T patent/ES2072884T3/en not_active Expired - Lifetime
- 1989-11-21 EP EP89121478A patent/EP0371371B1/en not_active Expired - Lifetime
- 1989-11-29 US US07/443,654 patent/US5008057A/en not_active Expired - Fee Related
- 1989-11-29 CA CA002004182A patent/CA2004182A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP0371371A2 (en) | 1990-06-06 |
| CA2004182A1 (en) | 1990-05-31 |
| ATE122596T1 (en) | 1995-06-15 |
| DE3840292A1 (en) | 1990-05-31 |
| EP0371371A3 (en) | 1991-12-04 |
| ES2072884T3 (en) | 1995-08-01 |
| DE3840292C2 (en) | 1991-02-28 |
| US5008057A (en) | 1991-04-16 |
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