EP1754583B1 - Wood based panel and method for the production thereof - Google Patents

Wood based panel and method for the production thereof Download PDF

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Publication number
EP1754583B1
EP1754583B1 EP06016822.6A EP06016822A EP1754583B1 EP 1754583 B1 EP1754583 B1 EP 1754583B1 EP 06016822 A EP06016822 A EP 06016822A EP 1754583 B1 EP1754583 B1 EP 1754583B1
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Prior art keywords
layer
outer layer
fabric
wood
strands
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EP06016822.6A
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German (de)
French (fr)
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EP1754583A1 (en
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Swiss Krono Tec AG
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Swiss Krono Tec AG
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Priority to PL06016822T priority Critical patent/PL1754583T3/en
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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
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/10—Moulding of mats
    • B27N3/14—Distributing or orienting the particles or fibres
    • B27N3/143—Orienting the particles or fibres

Definitions

  • the invention relates to a wood-based panel, in particular OSB panel, which has at least one upper cover layer, at least one middle layer and at least one lower cover layer, all of which consist of resin-coated strands and processes for their production in the resin-coated and at least one lower cover layer.
  • at least one topsheet and at least one middle layer forming strands are provided separately, the strands of the backsheet being deposited in a first orientation substantially longitudinal to the panel direction, the strands of the midlayer in a second orientation substantially transverse to the panel main direction on the backsheet are stored, the strands of the upper cover layer are placed back in the first orientation on the middle layer and a lower cover layer, middle layer and upper cover layer existing layer structure under increased pressure and elevated temper nature is pressed.
  • From the DE 44 34 876 A1 is a method for producing a coated wood-based panel is known in which with resin-coated wood chips in several layers too a chip cake are sprinkled and the wood chips are arranged in the first layer and in the last position substantially in alignment.
  • the US 4,058,580 discloses a method for producing a reinforced wood-based panel.
  • binder-coated cellulose particles are scattered, to which various reinforcing fibers, for example glass fibers or steel wires, are admixed. These scattered glued fibers are then pressed into the desired shape.
  • the WO 99/32285 discloses a wood-based panel according to the preamble of claim 1 and a method for producing a wood-based panel according to the preamble of claim 6, wherein a chipboard is made of several layers of resin-coated strands.
  • a chipboard is made of several layers of resin-coated strands.
  • existing tissue, scrims or nonwovens are provided in particular within or between the individual layers of glued wood chips made of natural fibers.
  • the FR 2 312 363 discloses a method for the continuous production of a wood-based panel in which a three-ply chip cake is sprinkled on a paper sheet and then continuously pressed.
  • the DE 1 945 779 describes a fiber reinforced plate and method for its endless manufacture.
  • a reinforcing layer of a glass fiber material or the like is applied to a wood-based panel, which is embedded on both sides in a connecting layer.
  • a reinforcing and a bonding layer is applied on both sides of the carrier plate, and then pressed continuously under pressure and heat.
  • the US 4,364,984 describes a multilayer wood-based panel which has a core of three layers of coarse wood chips scattered at an angle of 90 degrees with respect to each other. Both the top and the bottom are covered with a layer of fine wood particles.
  • All chips and wood particles are coated with an adhesive and the layer structure thus formed is then pressed in a hot press.
  • the WO 00/68527 discloses a quick-assembly and chopping board and method of dressing such and a method and apparatus for making the same.
  • a plate may be formed, for example, in the form of a chipboard or OSB board, to which an outer layer, for example, of a microforming is applied to the top and bottom.
  • the US 4,355,754 discloses various embodiments of railway sleepers made of a wood material which are reinforced in the area in which the rails are laid over the remaining area.
  • a two-layered threshold may contain chips of hardwood, such as oak, in the top layer, and chips of a softer wood, such as aspen, in the remainder of the layer.
  • the area of the threshold on which the rails rest consist of hardwood shavings from the top to the bottom throughout.
  • This area may additionally comprise reinforcing fibers such as carbon, glass fiber, plastic or metal. The reinforcing fibers may be present in this area only in the upper portion of the threshold.
  • Coated wood-based panels are used as furniture panels, as building elements, as shuttering panels or as floor panels.
  • walkable formwork panels e.g. In the roof area and in the floor slabs, it is important for the safety of the craftsmen that the wood-based panels have a non-slip surface, so that e.g. A roofer does not slip when walking the roof formwork.
  • Floor slabs are used in the commercial sector, eg in the work area of woodworking machines. To ensure that workers have a firm footing when operating the machines and reduce the risk of Accidents due to slipping must be prevented, the floor slabs must be non-slip equipped. Often, floor slabs, in particular OSB slabs, which have a smooth surface and are not slip-proof, must subsequently be provided with an anti-slip coating, for example made of sand, in order to meet the requirements of occupational safety.
  • an anti-slip coating for example made of sand
  • the grinding of the outer layers is particularly disadvantageous in OSB boards, which are used outdoors as roofing or facade board, because by the grinding of the surface on the one hand, the moisture resistance is reduced because the water-repellent press skin (Harzverflustik) is abraded or reduced, and on the other hand Bending strength of the wood-based panels decreases because the marginal layers, which have the greatest bulk density and thus strength, are ground down.
  • coatings such as paints, screeds, plastic or mineral plasters on OSB boards, because the adhesion of these coatings to the OSB boards is reduced due to the press skin.
  • the tensile strength of the cover layer is enhanced and the bending properties of the wood-based panel improved.
  • fabric fibers of different lengths, thicknesses and properties can be incorporated in a cover layer for this purpose. By introducing a defined amount of fabric fibers, the tensile strength of the cover layer can be adjusted to the particular intended use of the wood-based panel.
  • the layer comprising the textile fibers has at least one fabric layer on the surface.
  • the flexural properties of an OSB board are also increased.
  • the fabric layer on the opposite side of the force acting the tension side arranged.
  • the application of the fabric mat also reduces the swelling and shrinkage behavior of an OSB board when wood moisture changes.
  • the technical properties of the wood-based panel in particular the flexural and modulus of elasticity, the flexural strength, the swelling behavior and the fire behavior are improved.
  • an OSB board can serve as a carrier material for applied paint, screed or plaster systems through the rough surface of the fabric layer, which can be applied directly.
  • the fabric layer creates a slip-resistant surface on an OSB board, which enables the use of these OSB boards in new applications, such as in the roof formwork or in the stage covering area. For these applications, the fabric layer is placed on the top of the board.
  • the fabric layer has a weight of at least 50 to 400 g / m 2 , preferably 200 g / m 2 , so that a significant increase in flexural strength, as well as an improvement of the swelling and shrinkage behavior of an OSB board is realized.
  • the fabric insert may have a resin impregnation and / or a glue layer.
  • a paper layer can be applied below the fabric layer.
  • the paper layer to a weight of at least 50 to 400 g / m 2 , preferably 80 to 100 g / m 2 .
  • the paper layer may have various optical designs and so create a decorative effect on the plate, such as signal colors for walk-roofing slabs.
  • the paper layer may have a resin impregnation and / or a glue layer.
  • an OSB board may have a fabric layer with a weight of at least 50 to 400 g / m 2 , preferably 200 g / m 2 .
  • the fabric layer may have a resin impregnation and / or a glue layer.
  • a method for producing a generic wood-based panel is characterized by the features of claim 6.
  • the process for producing a wood-based panel, in particular an OSB board in a continuous process since so achieved a uniform application of lower and / or upper cover layer on the forming belt and continuous addition of the fabric fibers to the strands. It is particularly advantageous that for the entry of the fabric fibers no additional equipment or equipment parts must be provided and so the production costs are particularly low.
  • At least one layer of fabric is applied to the layer comprising the textile fibers prior to pressing.
  • the OSB board thus obtains a non-slip surface, such that the OSB board has e.g. can be used as a walk-in roof planking or as a stage covering.
  • These OSB boards are suitable for applications with particularly high requirements, for which conventional OSB boards are not suitable.
  • At least one paper layer may be applied to the top cover layer and / or the bottom cover layer to further enhance the resistance of an OSB panel to moisture absorption and the flexural strength of an OSB panel.
  • this method is continuous, in order to achieve both the uniform distribution of the fabric fibers only in the upper or only in the lower cover layer as well as to realize a uniform order of the fabric layer on the upper and / or lower cover layer cost.
  • FIG. 1 shows an OSB board 1, consisting of an upper cover layer 2, a middle layer 3 and a lower cover layer 4 of long, glued chips.
  • a paper layer 7 and a fabric layer 5 is applied on the upper side of the cover layer 2.
  • Fabric and paper layers 5, 7 each have a glue layer 6, 8, which fixes the paper 7 or the fabric 5 on the cover layer 2 of the OSB board 1.
  • the fabric layer 5 serves the purpose of providing a non-slip surface on the OSB board 1.
  • the OSB board 1 can also be used in applications in which they could not be used because of the smooth surface, for example, as a roof formwork panel or in the stage covering area.
  • the fabric layer 5 is arranged on the surface of the upper cover layer 2.
  • FIG. 2 shows a process scheme for producing an OSB board1.
  • the strands are scattered in conventional processes on a continuously circulating forming belt to a layer structure 9, wherein the strands of the two cover layers 2 and 4 are deposited substantially along the plate main direction x.
  • the fabric fibers can be mixed. This leads to an increase in the tensile strength of the cover layer 2 or 4 and therefore has a positive effect on the bending properties of the OSB board 1.
  • a fabric layer 5 is given to the layer structure 9 and pressed together with this in the hot press.
  • the fabric layer 5 has the task of increasing the bending properties of the OSB board 1.
  • the OSB plate 1 For this purpose is used the OSB plate 1, the fabric layer 5 on the opposite side of the force acting force (tension side).
  • the fabric layer 5 reduces the swelling and shrinkage behavior of the OSB board 1.
  • the OSB board 1 can serve as a carrier material for applied paint, screed or plaster systems.
  • the fabric layer 5 also produces a slip-resistant surface.
  • FIG. 3 shows the Roh Whyverlauf over the thickness of an OSB board 1.
  • the outer cover layers 2 and 4 show gross density maxima, indicating that the strength of the OSB board 1, especially in these outdoor areas are particularly high.

Description

Die Erfindung betrifft eine Holzwerkstoffplatte, insbesondere OSB-Platte, die mindestens eine obere Deckschicht, mindestens eine Mittelschicht und mindestens eine untere Deckschicht aufweist, die allesamt aus harzbeleimten Strands bestehen und Verfahren zu ihrer Herstellung bei dem mit Harz beleimte und als mindestens eine untere Deckschicht, als mindestens eine obere Deckschicht und als mindestens eine Mittelschicht bildende Strands separat bereitgestellt werden, die Strands der unteren Deckschicht in einer ersten Orientierung im Wesentlichen längs zur Plattenhauptrichtung abgelegt werden, die Strands der Mittelschicht in einer zweiten Orientierung im Wesentlichen quer zur Plattenhauptrichtung auf die untere Deckschicht abgelegt werden, die Strands der oberen Deckschicht wieder in der ersten Orientierung auf die Mittelschicht abgelegt werden und ein aus unterer Deckschicht, Mittelschicht und oberer Deckschicht bestehender Schichtaufbau unter erhöhtem Druck und unter erhöhter Temperatur verpresst wird.The invention relates to a wood-based panel, in particular OSB panel, which has at least one upper cover layer, at least one middle layer and at least one lower cover layer, all of which consist of resin-coated strands and processes for their production in the resin-coated and at least one lower cover layer. as at least one topsheet and at least one middle layer forming strands are provided separately, the strands of the backsheet being deposited in a first orientation substantially longitudinal to the panel direction, the strands of the midlayer in a second orientation substantially transverse to the panel main direction on the backsheet are stored, the strands of the upper cover layer are placed back in the first orientation on the middle layer and a lower cover layer, middle layer and upper cover layer existing layer structure under increased pressure and elevated temper nature is pressed.

Aus der DE 44 34 876 A1 ist ein Verfahren zur Herstellung einer beschichten Holzwerkstoffplatte bekannt, bei dem mit harzbeleimte Holzspäne in mehreren Lagen zu einem Spankuchen gestreut werden und die Holzspäne in der ersten Lage und in der letzten Lage im Wesentlichen in einer Ausrichtung angeordnet sind.From the DE 44 34 876 A1 is a method for producing a coated wood-based panel is known in which with resin-coated wood chips in several layers too a chip cake are sprinkled and the wood chips are arranged in the first layer and in the last position substantially in alignment.

Die US 4,058,580 offenbart ein Verfahren zur Herstellung einer verstärkten Holzwerkstoffplatte. Dabei werden mit Bindemittel beschichtete Zellulosepartikel aufgestreut, denen verschiedene verstärkende Fasern, beispielsweise Glasfasern oder Stahldrähte, beigemischt werden. Diese aufgestreuten beleimten Fasern werden anschließend in die gewünschte Form verpresst.The US 4,058,580 discloses a method for producing a reinforced wood-based panel. In this case, binder-coated cellulose particles are scattered, to which various reinforcing fibers, for example glass fibers or steel wires, are admixed. These scattered glued fibers are then pressed into the desired shape.

Die WO 99/32285 offenbart eine Holzwerkstoffplatte gemäß dem Oberbegriff des Anspruchs 1 und ein Verfahren zur Herstellung einer Holzwerkstoffplatte gemäß dem Oberbegriff des Anspruchs 6, wobei eine Holzspanplatte aus mehreren Schichten harzbeleimter Strands hergestellt wird. Dabei werden insbesondere innerhalb oder zwischen den einzelnen Schichten aus beleimten Holzspänen aus Naturfasern bestehende Gewebe, Gelege oder Vliese vorgesehen.The WO 99/32285 discloses a wood-based panel according to the preamble of claim 1 and a method for producing a wood-based panel according to the preamble of claim 6, wherein a chipboard is made of several layers of resin-coated strands. In this case, existing tissue, scrims or nonwovens are provided in particular within or between the individual layers of glued wood chips made of natural fibers.

Die FR 2 312 363 offenbart ein Verfahren zum kontinuierlichen Herstellen einer Holzwerkstoffplatte, bei dem ein dreilagiger Spankuchen auf eine Papierlage aufgestreut und anschließend kontinuierlich verpresst wird.The FR 2 312 363 discloses a method for the continuous production of a wood-based panel in which a three-ply chip cake is sprinkled on a paper sheet and then continuously pressed.

Die DE 1 945 779 beschreibt ein faserverstärkte Platte und ein Verfahren zu ihrer endlosen Herstellung. Dabei wird auf eine Holzwerkstoffplatte eine Verstärkungsschicht aus einem Glasfaserwerkstoff oder ähnlichem aufgebracht, der beidseitig in einer Verbindungsschicht eingebettet ist. Bei dem dort beschriebenen Verfahren wird auf die Trägerplatte beidseitig eine Verstärkungs- und eine Verbindungsschicht aufgebracht, und anschließend kontinuierlich unter Druck- und Wärmeeinwirkung verpresst.The DE 1 945 779 describes a fiber reinforced plate and method for its endless manufacture. In this case, a reinforcing layer of a glass fiber material or the like is applied to a wood-based panel, which is embedded on both sides in a connecting layer. In the method described there, a reinforcing and a bonding layer is applied on both sides of the carrier plate, and then pressed continuously under pressure and heat.

Die US 4,364,984 beschreibt eine mehrlagige Holzwerkstoffplatte, die einen Kern aus drei Schichten grober Holzspäne aufweist, die in einem Winkel von 90 Grad zueinander versetzt aufgestreut wurden. Sowohl die Oberseite als auch die Unterseite wird mit einer Schicht aus feinen Holzpartikeln abgedeckt.The US 4,364,984 describes a multilayer wood-based panel which has a core of three layers of coarse wood chips scattered at an angle of 90 degrees with respect to each other. Both the top and the bottom are covered with a layer of fine wood particles.

Alle Späne und Holzpartikel sind mit einem Klebstoff beschichtet und der so gebildete Schichtaufbau wird anschließend in einer Heißpresse verpresst.All chips and wood particles are coated with an adhesive and the layer structure thus formed is then pressed in a hot press.

Die WO 00/68527 offenbart eine Schnellbau- und Schaltafel sowie Verfahren zum Zurichten einer solchen und ein Verfahren und eine Vorrichtung zu ihrer Herstellung. Eine derartige Platte kann beispielsweise in Form einer Span- oder OSB-Platte ausgebildet sein, auf die auf die Ober- und Unterseite eine Außenschicht beispielsweise aus einem Mikrofurnier aufgebracht ist.The WO 00/68527 discloses a quick-assembly and chopping board and method of dressing such and a method and apparatus for making the same. Such a plate may be formed, for example, in the form of a chipboard or OSB board, to which an outer layer, for example, of a microforming is applied to the top and bottom.

Die US 4,355,754 offenbart verschiedene Ausführungsformen von Eisenbahnschwellen aus einem Holzwerkstoff, die in dem Bereich, in dem die Schienen aufgelegt werden, gegenüber dem übrigen Bereich verstärkt sind. Eine zweischichtig gestreute Schwelle kann in der Deckschicht Späne aus Hartholz, wie beispielsweise Eiche, und in der übrigen Schicht Späne aus einem weicheren Holz wie beispielsweise Espe, enthalten. Auch kann der Bereich der Schwelle, auf dem die Schienen aufliegen, von der Oberseite bis zur Unterseite durchgängig aus Hartholzspänen bestehen. Dieser Bereich kann zusätzlich auch Verstärkungsfasern, wie beispielsweise Karbon, Glasfaser, Kunststoff oder Metall aufweisen. Die Verstärkungsfasern können in diesem Bereich auch nur in dem oberen Abschnitt der Schwelle vorhanden sein.The US 4,355,754 discloses various embodiments of railway sleepers made of a wood material which are reinforced in the area in which the rails are laid over the remaining area. A two-layered threshold may contain chips of hardwood, such as oak, in the top layer, and chips of a softer wood, such as aspen, in the remainder of the layer. Also, the area of the threshold on which the rails rest, consist of hardwood shavings from the top to the bottom throughout. This area may additionally comprise reinforcing fibers such as carbon, glass fiber, plastic or metal. The reinforcing fibers may be present in this area only in the upper portion of the threshold.

Beschichtete Holzwerkstoffplatten werden als Möbelplatten, als Bauelemente, als Schalungsplatten oder als Bodenplatten verwendet. Insbesondere bei begehbaren Schalungsplatten, z.B. im Dachbereich und bei der Bodenplatten ist es für die Sicherheit der Handwerker wichtig, dass die Holzwerkstoffplatten eine rutschsichere Oberfläche aufweisen, damit z.B. ein Dachdecker beim Begehen der Dachschalung nicht ausrutscht.Coated wood-based panels are used as furniture panels, as building elements, as shuttering panels or as floor panels. In particular with walkable formwork panels, e.g. In the roof area and in the floor slabs, it is important for the safety of the craftsmen that the wood-based panels have a non-slip surface, so that e.g. A roofer does not slip when walking the roof formwork.

Bodenplatten werden im gewerblichen Bereich, z.B. im Arbeitsbereich von Holzbearbeitungsmaschinen eingesetzt. Um sicherzustellen, dass Arbeiter beim Bedienen der Maschinen einen festen Stand haben und die Gefahr von Unfällen durch Ausrutschen auszuschließen ist, müssen die Bodenplatten rutschsicher ausgerüstet sein. Häufig müssen Bodenplatten, insbesondere OSB-Platten, die eine glatte Oberfläche aufweisen und nicht rutschsicher sind, dann nachträglich mit einer rutschhemmenden Beschichtung, z.B. aus Sand, versehen werden, um den Anforderungen an Arbeitssicherheit gerecht zu werden.Floor slabs are used in the commercial sector, eg in the work area of woodworking machines. To ensure that workers have a firm footing when operating the machines and reduce the risk of Accidents due to slipping must be prevented, the floor slabs must be non-slip equipped. Often, floor slabs, in particular OSB slabs, which have a smooth surface and are not slip-proof, must subsequently be provided with an anti-slip coating, for example made of sand, in order to meet the requirements of occupational safety.

Darüber hinaus besteht ein zunehmender Bedarf an Holzwerkstoffplatten, die auch bei vergleichsweise geringen Plattenstärken hohe Festigkeitseigenschaften aufweisen und sich für eine Verwendung im Baubereich gut eignen, da sie leichter sind und damit einfacher zu handhaben sind.In addition, there is an increasing demand for wood-based panels that have high strength properties even with comparatively low board thicknesses and are well suited for use in the construction sector, as they are lighter and thus easier to handle.

Das Schleifen der Deckschichten ist insbesondere bei OSB-Platten nachteilig, die im Außenbereich z.B. als Dachschalungsplatte oder Fassadenpatte eingesetzt werden, weil durch das Schleifen der Oberfläche einerseits die Feuchtigkeitsbeständigkeit verringert wird, da die wasserabweisende Presshaut (Harzverflusschicht) abgeschliffen oder reduziert wird, und andererseits die Biegefestigkeit der Holzwerkstoffplatten abnimmt, weil die Randschichten, die die größte Rohdichte und damit Festigkeit aufweisen, abgeschliffen werden. Zudem ist es problematisch, Beschichtungen, wie zum Beispiel Anstriche, Estriche, Kunststoff- oder Mineralputze auf OSB-Platten aufzubringen, da die Anhaftfähigkeit dieser Beschichtungen auf den OSB-Platten aufgrund der Presshaut vermindert ist.The grinding of the outer layers is particularly disadvantageous in OSB boards, which are used outdoors as roofing or facade board, because by the grinding of the surface on the one hand, the moisture resistance is reduced because the water-repellent press skin (Harzverflusschicht) is abraded or reduced, and on the other hand Bending strength of the wood-based panels decreases because the marginal layers, which have the greatest bulk density and thus strength, are ground down. In addition, it is problematic to apply coatings, such as paints, screeds, plastic or mineral plasters on OSB boards, because the adhesion of these coatings to the OSB boards is reduced due to the press skin.

Von dieser Problemstellung ausgehend ist es Aufgabe der Erfindung gattungsgemäße Holzwerkstoffplatten und das Verfahren zur Herstellung von Holzwerkstoffplatten so zu verbessern, dass sie höhere mechanische Festigkeiten und verbesserte physikalische Werte aufweisen, dass sie direkt mit Anstrich- oder Putzsystemen beschichtet werden können und kostengünstig herstellbar sind.Starting from this problem, it is an object of the invention to improve generic wood-based panels and the process for the production of wood-based panels so that they have higher mechanical strength and improved physical properties, that they can be coated directly with paint or plaster systems and are inexpensive to produce.

Zur Problemlösung zeichnet sich eine gattungsgemäße Holzwerkstoffplatte durch die Merkmale des Anspruchs 1 aus.To solve the problem, a generic wood-based panel characterized by the features of claim 1.

Dadurch wird die Zugfestigkeit der Decklage verstärkt und die Biegeeigenschaften der Holzwerkstoffplatte verbessert. Vorteilhafterweise können dazu Gewebefasern unterschiedlicher Länge, Dicke und Beschaffenheit in einer Deckschicht eingebracht werden. Durch das Einbringen einer definierten Menge von Gewebefasern kann die Zugfestigkeit der Decklage auf den jeweiligen späteren Verwendungszweck der Holzwerkstoffplatte eingestellt werden.As a result, the tensile strength of the cover layer is enhanced and the bending properties of the wood-based panel improved. Advantageously, fabric fibers of different lengths, thicknesses and properties can be incorporated in a cover layer for this purpose. By introducing a defined amount of fabric fibers, the tensile strength of the cover layer can be adjusted to the particular intended use of the wood-based panel.

Vorteilhafterweise weist die die Gewebefasern aufweisende Schicht auf der Oberfläche mindestens eine Gewebelage auf.Advantageously, the layer comprising the textile fibers has at least one fabric layer on the surface.

Durch das Aufbringen einer Gewebelage, zum Beispiel in Form einer Gewebematte, werden ebenfalls die Biegeeigenschaften einer OSB-Platte erhöht. Zu diesem Zweck wird beim Einsatz der OSB-Platten die Gewebelage auf der der einwirkenden Kraft gegenüberliegenden Seite, der Zugseite, angeordnet. Vorteilhafterweise wird durch das Aufbringen der Gewebematte auch das Quell- und Schwindverhalten einer OSB-Platte bei Holzfeuchteänderungen reduziert.By applying a fabric layer, for example in the form of a fabric mat, the flexural properties of an OSB board are also increased. For this purpose, when using the OSB boards the fabric layer on the opposite side of the force acting, the tension side arranged. Advantageously, the application of the fabric mat also reduces the swelling and shrinkage behavior of an OSB board when wood moisture changes.

Wird als Gewebelage eine Glasfaserbahn verwendet, werden die technischen Eigenschaften der Holzwerkstoffplatte, insbesondere der Biege- und E-Modul, die Biegefestigkeit, das Quell- und das Brandverhalten verbessert.If a glass fiber web is used as the fabric layer, the technical properties of the wood-based panel, in particular the flexural and modulus of elasticity, the flexural strength, the swelling behavior and the fire behavior are improved.

Zudem kann eine OSB-Platte durch die raue Oberfläche der Gewebelage als Trägermaterial für aufzubringende Anstrich-, Estrich- oder Putzsysteme dienen, die direkt aufgebracht werden können.In addition, an OSB board can serve as a carrier material for applied paint, screed or plaster systems through the rough surface of the fabric layer, which can be applied directly.

Durch die Gewebelage wird eine rutschhemmende Oberfläche auf einer OSB-Platte erzeugt, die den Einsatz dieser OSB-Platten in neuen Einsatzgebieten, beispielsweise in der Dachschalung oder im Bühnenbelagsbereich ermöglicht. Für diese Anwendungsbereiche wird die Gewebelage auf der Plattenoberseite angeordnet.The fabric layer creates a slip-resistant surface on an OSB board, which enables the use of these OSB boards in new applications, such as in the roof formwork or in the stage covering area. For these applications, the fabric layer is placed on the top of the board.

Vorteilhafterweise weist die Gewebelage ein Gewicht von mindestens 50 bis 400 g/m2, vorzugsweise 200 g/m2 auf, damit eine deutliche Steigerung der Biegefestigkeit, sowie eine Verbesserung des Quell- und Schwindverhaltens einer OSB-Platte realisiert wird.Advantageously, the fabric layer has a weight of at least 50 to 400 g / m 2 , preferably 200 g / m 2 , so that a significant increase in flexural strength, as well as an improvement of the swelling and shrinkage behavior of an OSB board is realized.

Um die Haftung der Gewebelage auf der Oberfläche einer OSB-Platte zu gewährleisten, kann die Gewebeeinlage über eine Harzimprägnierung und/oder eine Leimschicht verfügen.In order to ensure the adhesion of the fabric layer to the surface of an OSB board, the fabric insert may have a resin impregnation and / or a glue layer.

Um die Biegeeigenschaften einer OSB-Platte noch weiter zu verbessern, kann unterhalb der Gewebelage eine Papierlage aufgebracht werden. Vorteilhafterweise weist die Papierlage dazu ein Gewicht von mindestens 50 bis 400 g/m2, vorzugsweise 80 bis 100 g/m2 auf. Weiterhin kann die Papierlage verschiedene optische Gestaltungen aufweisen und so einen dekorativen Effekt auf der Platte erzeugen, z.B. Signalfarben für begehbare Dachschalungsplatten.In order to further improve the bending properties of an OSB board, a paper layer can be applied below the fabric layer. Advantageously, the paper layer to a weight of at least 50 to 400 g / m 2 , preferably 80 to 100 g / m 2 . Furthermore, the paper layer may have various optical designs and so create a decorative effect on the plate, such as signal colors for walk-roofing slabs.

Um die Haftung der Papierlage auf einer OSB-Platte zu verbessern, kann diese über eine Harzimprägnierung und/oder eine Leimschicht verfügen.In order to improve the adhesion of the paper layer to an OSB board, it may have a resin impregnation and / or a glue layer.

Durch die Kombination von Gewebefasern in der oberen Deckschicht und einer Gewebelage auf der Oberfläche der oberen und/oder der unteren Deckschicht werden OSB-Platten geschaffen, die extrem hohe Biegefestigkeitseigenschaften aufweisen, ein noch weiter verbessertes Quell- und Schwindverhalten besitzen und sich gleichzeitig für die Beschichtung mit Anstrich- oder Putzsystem eignen und darüber hinaus als rutschfeste Bodenplatte eingesetzt werden können.The combination of fabric fibers in the upper cover layer and a fabric layer on the surface of the upper and / or the lower cover layer OSB plates are created, which have extremely high flexural strength properties, have an even better swelling and shrinkage behavior and at the same time for the coating suitable with paint or plaster system and can also be used as a non-slip floor plate.

Vorteilhafterweise kann eine OSB-Platte dazu eine Gewebelage mit einem Gewicht von mindestens 50 bis 400 g/m2 aufweisen, vorzugsweise 200 g/m2.Advantageously, an OSB board may have a fabric layer with a weight of at least 50 to 400 g / m 2 , preferably 200 g / m 2 .

Damit die Gewebelage auf einer OSB-Platte haftet, kann die Gewebelage über ein Harzimprägnierung und/oder eine Leimschicht verfügen.
Ein Verfahren zur Herstellung einer gattungsgemäßen Holzwerkstoffplatte zeichnet sich durch die Merkmale des Anspruchs 6 aus.So that the fabric layer adheres to an OSB board, the fabric layer may have a resin impregnation and / or a glue layer.
A method for producing a generic wood-based panel is characterized by the features of claim 6.

Durch die Zugabe der Gewebefasern zu den Strands nur für die untere oder nur für die obere Deckschicht wird eine homogene Verteilung der Gewebefasern und der Strands über die vorhandenen Streueinrichtungen in der Deckschicht der Platte erreicht. Dies resultiert in einer gleichmäßigen Biegefestigkeit der Holzwerkstoffplatte. Je nachdem, wie hoch der Anteil der Gewebefasern nur in der unteren oder nur in der oberen Deckschicht ist, können die Festigkeitseigenschaften und die Quell- und Schwindeigenschaften der Holzwerkstoffplatte eingestellt werden.
Vorteilhafterweise läuft das Verfahren zur Herstellung einer Holzwerkstoffplatte, insbesondere eine OSB-Platte in einem kontinuierlichen Prozess ab, da so ein gleichmäßiger Auftrag von unterer und/oder oberer Deckschicht auf das Formband erreicht werden kann und eine kontinuierliche Zugabe der Gewebefasern in die Strands erfolgt. Besonders vorteilhaft ist, dass zum Eintrag der Gewebefasern keine zusätzlichen Anlagen oder Anlagenteile bereitgestellt werden müssen und so die Produktionskosten besonders niedrig sind.By adding the fabric fibers to the strands only for the lower or only the upper cover layer, a homogeneous distribution of the fabric fibers and the strands over the existing scatterers in the cover layer of the plate is achieved. This results in a uniform bending strength of the wood-based panel. Depending on how high the proportion of the fabric fibers is only in the lower or only in the upper cover layer, the strength properties and the swelling and shrinkage properties of the wood-based panel can be adjusted.
Advantageously, the process for producing a wood-based panel, in particular an OSB board in a continuous process, since so achieved a uniform application of lower and / or upper cover layer on the forming belt and continuous addition of the fabric fibers to the strands. It is particularly advantageous that for the entry of the fabric fibers no additional equipment or equipment parts must be provided and so the production costs are particularly low.

Vorteilhafterweise wird vor dem Verpressen mindestens eine Gewebelage auf die die Gewebefasern aufweisende Schicht aufgebracht.Advantageously, at least one layer of fabric is applied to the layer comprising the textile fibers prior to pressing.

So kann eine noch deutlichere Steigerung der Festigkeitseigenschaften und eine Verbesserung des Quell- und Schwindverhalten einer OSB-Platte erreicht werden. Weiterhin erhält die OSB-Platte so eine rutschfeste Oberfläche, so dass die OSB-Platte z.B. als begehbare Dachbeplankung oder als Bühnenbelag eingesetzt werden kann. Diese OSB-Platten eignen sich für Einsatzgebiete mit besonders hohen Anforderungen, für die herkömmliche OSB-Platten nicht geeignet sind.Thus, an even clearer increase in the strength properties and an improvement in the swelling and shrinkage behavior of an OSB board can be achieved. Furthermore, the OSB board thus obtains a non-slip surface, such that the OSB board has e.g. can be used as a walk-in roof planking or as a stage covering. These OSB boards are suitable for applications with particularly high requirements, for which conventional OSB boards are not suitable.

Vorteilhafterweise kann vor dem Aufbringen der Gewebelage mindestens eine Papierlage auf die obere Deckschicht und/oder die untere Deckschicht aufgebracht werden, um die Widerstandsfähigkeit einer OSB-Platte vor Aufnahme von Feuchtigkeit sowie die Biegefestigkeit einer OSB-Platte weiter zu verbessern.Advantageously, prior to application of the fabric layer, at least one paper layer may be applied to the top cover layer and / or the bottom cover layer to further enhance the resistance of an OSB panel to moisture absorption and the flexural strength of an OSB panel.

Wenn das Verfahren zum Aufbringen der Gewebelage auf die obere Deckschicht und/oder auf die untere Deckschicht kontinuierlich abläuft, können zum einen Kosten für zusätzliche Maschinen gespart werden und zum anderen kann ein gleichmäßiger Auftrag der Gewebelage auf die obere und/oder auf die untere Gewebelage erfolgen.If the method for applying the fabric layer to the upper cover layer and / or to the lower cover layer proceeds continuously, on the one hand costs for additional machines can be saved and on the other hand a uniform application of the fabric layer to the upper and / or the lower fabric layer can take place ,

Vorteilhafterweise verläuft dieses Verfahren kontinuierlich, um sowohl die gleichmäßige Verteilung der Gewebefasern nur in der oberen oder nur in der unteren Deckschicht zu erreichen als auch einen gleichmäßigen Auftrag der Gewebelage auf die obere und/oder die untere Deckschicht kostengünstig zu realisieren.Advantageously, this method is continuous, in order to achieve both the uniform distribution of the fabric fibers only in the upper or only in the lower cover layer as well as to realize a uniform order of the fabric layer on the upper and / or lower cover layer cost.

Mit Hilfe einer Zeichnung soll ein Ausführungsbeispiel der Erfindung nachfolgend näher erläutert werden. Es zeigen:

Figur 1 -
den Querschnitt eine OSB-Platte mit Gewebe- und Papierlage;
Figur 2 -
ein Prozessschema zur Herstellung einer Holzwerkstoffplatte;
Figur 3 -
das Rohdichte-Profil über die Dicke einer Holzwerkstoffplatte.
With the aid of a drawing, an embodiment of the invention will be explained in more detail below. Show it:
FIG. 1 -
the cross section of an OSB plate with tissue and paper layer;
FIG. 2 -
a process scheme for producing a wood-based panel;
FIG. 3 -
the gross density profile across the thickness of a wood-based panel.

Figur 1 zeigt eine OSB-Platte 1, bestehend aus einer oberen Deckschicht 2, einer Mittelschicht 3 und einer unteren Deckschicht 4 aus langen, beleimten Spänen. Auf die Oberseite der Deckschicht 2 ist eine Papierlage 7 und eine Gewebelage 5 aufgebracht, um die Festigkeitseigenschaften sowie das Quell- und Schwindverhalten der OSB-Platte 1 zu erhöhen. Gewebe- und Papierlage 5, 7 weisen jeweils eine Leimschicht 6, 8 auf, die das Papier 7 bzw. das Gewebe 5 auf der Deckschicht 2 der OSB-Platte 1 fixiert. Zusätzlich dient die Gewebelage 5 dem Zweck, eine rutschfeste Oberfläche auf der OSB-Platte 1 bereitzustellen. Dadurch lässt sich die OSB-Platte 1 auch in Einsatzbereichen anwenden, in denen sie bisher wegen der glatten Oberfläche nicht eingesetzt werden konnte, beispielsweise als Dachschalungsplatte oder im Bühnenbelagsbereich. Für diese Anwendungsbereiche wird die Gewebelage 5 auf der Oberfläche der oberen Deckschicht 2 angeordnet. FIG. 1 shows an OSB board 1, consisting of an upper cover layer 2, a middle layer 3 and a lower cover layer 4 of long, glued chips. On the upper side of the cover layer 2, a paper layer 7 and a fabric layer 5 is applied in order to increase the strength properties and the swelling and shrinkage behavior of the OSB board 1. Fabric and paper layers 5, 7 each have a glue layer 6, 8, which fixes the paper 7 or the fabric 5 on the cover layer 2 of the OSB board 1. In addition, the fabric layer 5 serves the purpose of providing a non-slip surface on the OSB board 1. As a result, the OSB board 1 can also be used in applications in which they could not be used because of the smooth surface, for example, as a roof formwork panel or in the stage covering area. For these applications, the fabric layer 5 is arranged on the surface of the upper cover layer 2.

Figur 2 zeigt ein Prozessschema zur Herstellung einer OSB-Platte1. Die Strands werden in herkömmlichen Verfahren auf einem kontinuierlich umlaufenden Formband zu einem Schichtaufbau 9 gestreut, wobei die Strands der beiden Deckschichten 2 und 4 im Wesentlichen längs zur Plattenhauptrichtung x abgelegt werden. In den Streustationen für die äußeren Deckschichten 2 und 4 können die Gewebefasern beigemischt werden. Dies führt zu einer Verstärkung der Zugfestigkeit der Deckschicht 2 oder 4 und wirkt sich daher positiv auf die Biegeeigenschaften der OSB-Platte 1 aus. Vor dem Einlauf des Schichtaufbaus 9 in die Heißpresse wird von einer Rollabwicklung eine Gewebelage 5 mit auf den Schichtaufbau 9 gegeben und mit diesem in der Heißpresse zusammen verpresst. Dabei hat die Gewebelage 5 die Aufgabe, die Biegeeigenschaften der OSB-Platte 1 zu erhöhen. Zu diesem Zweck wird beim Einsatz der OSB-Platte 1 die Gewebelage 5 auf der der einwirkenden Kraft gegenüberliegenden Seite (Zugseite) angeordnet. Zusätzlich reduziert die Gewebelage 5 das Quell- und Schwindverhalten der OSB-Platte 1. Dadurch und durch die raue Oberfläche der Gewebelage 5 kann die OSB-Platte 1 als Trägermaterial für aufzubringende Anstrich-, Estrich- oder Putzsystemen dienen. Die Gewebelage 5 erzeugt zum anderen auch eine rutschhemmende Oberfläche. FIG. 2 shows a process scheme for producing an OSB board1. The strands are scattered in conventional processes on a continuously circulating forming belt to a layer structure 9, wherein the strands of the two cover layers 2 and 4 are deposited substantially along the plate main direction x. In the scattering stations for the outer cover layers 2 and 4, the fabric fibers can be mixed. This leads to an increase in the tensile strength of the cover layer 2 or 4 and therefore has a positive effect on the bending properties of the OSB board 1. Before the inlet of the layer structure 9 in the hot press of a roll handling a fabric layer 5 is given to the layer structure 9 and pressed together with this in the hot press. The fabric layer 5 has the task of increasing the bending properties of the OSB board 1. For this purpose is used the OSB plate 1, the fabric layer 5 on the opposite side of the force acting force (tension side). In addition, the fabric layer 5 reduces the swelling and shrinkage behavior of the OSB board 1. Thereby, and by the rough surface of the fabric layer 5, the OSB board 1 can serve as a carrier material for applied paint, screed or plaster systems. On the other hand, the fabric layer 5 also produces a slip-resistant surface.

Bei der Plattenherstellung werden nur Gewebefasern einer der beiden äußeren Deckschichten 2, 4 beigemischt. Vor dem Einlauf des Schichtaufbaus 9 in die Heißpresse kann eine Gewebelage 5 auf die obere Deckschicht 2 aufgelegt werden.In the case of plate production, only textile fibers are admixed with one of the two outer cover layers 2, 4. Before entering the layer structure 9 in the hot press, a fabric layer 5 can be placed on the upper cover layer 2.

Figur 3 zeigt den Rohdichteverlauf über die Dicke einer OSB-Platte 1. Im Bereich der äußeren Deckschichten 2 und 4 zeigen sich Rohdichtemaxima, die darauf hinweisen, dass die Festigkeiten der OSB-Platte 1 vor allem in diesen Außenbereichen besonders hoch sind. FIG. 3 shows the Rohdichteverlauf over the thickness of an OSB board 1. In the area of the outer cover layers 2 and 4 show gross density maxima, indicating that the strength of the OSB board 1, especially in these outdoor areas are particularly high.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
OSB-PlatteOSB
22
obere Deckschichtupper cover layer
33
mittlere Schichtmiddle layer
44
untere Deckschichtlower cover layer
55
Gewebelagefabric layer
66
Leimschichtlayer of glue
77
Papierlagepaper layer
88th
Leimschichtlayer of glue
99
Schichtaufbaulayer structure
xx
PlattenlängsrichtungPlate longitudinal direction

Claims (10)

  1. Wood-based panel, in particular OSB panel (1), which has at least one upper outer layer (2), at least one middle layer (3) and at least one lower outer layer (4), which all consist of resin-glued strands, characterized in that, by adding textile fibres to the strands only for the upper outer layer (2) or only for the lower outer layer (4), the wood-based panel (1) has a homogeneous distribution of the fabric fibres and strands only in the upper outer layer (2) or only in the lower outer layer (4).
  2. Wood-based panel according to Claim 1, characterized in that the layer (2, 4) comprising the fabric fibres has at least one fabric ply (5) on the surface.
  3. Wood-based panel according to Claim 2, characterized in that the fabric ply (5) has a weight of at least 50 to 400 g/m2, preferably 200 g/m2.
  4. Wood-based panel according to Claim 3, characterized in that the fabric ply (5) comprises a resin impregnation and/or a glue layer (6).
  5. Wood-based panel according to one or more of Claims 2-4, characterized in that the fabric ply (5) is a glass fibre web.
  6. Method for producing a wood-based panel, in particular an OSB panel (1), in which
    - strands glued with resin and
    - forming at least one lower outer layer (4), at least one upper outer layer (2) and at least one middle layer (3) are separately provided,
    - the strands of the lower outer layer (4) are laid down in a first orientation substantially longitudinally in relation to the main panel direction (x),
    - the strands of the middle layer (3) are laid down onto the lower outer layer (4) in a second orientation substantially transversely in relation to the main panel direction (x),
    - the strands of the upper outer layer (2) are laid down onto the middle layer (3), again in the first orientation (x),
    - and a laminate (9) consisting of the lower outer layer (4), the middle layer (3) and the upper outer layer (2) is pressed under elevated pressure and elevated temperature,
    characterized in that
    - fabric fibres are provided,
    - the fabric fibres are added to the strands only for the lower outer layer (4) or only for the upper outer layer (2),
    - a homogeneous distribution of the fabric fibres and strands is achieved only in the lower outer layer (4) or only in the upper outer layer (2).
  7. Method according to Claim 6, characterized in that the method proceeds continuously.
  8. Method according to Claim 6 or 7, characterized in that, before the pressing, at least one fabric ply (5) is applied to the layer (2, 4) comprising the fabric fibres.
  9. Method according to Claim 8, characterized in that, before the application of the fabric ply (5), at least one paper ply (7) is applied to the upper layer (2, 4).
  10. Method according to Claim 8 or 9, characterized in that the method proceeds continuously.
EP06016822.6A 2005-08-17 2006-08-11 Wood based panel and method for the production thereof Not-in-force EP1754583B1 (en)

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DE102007054711B4 (en) 2007-11-14 2014-12-04 Fritz Egger Gmbh & Co. Og Method for producing a thin chipboard with increased stability and thin chipboard with increased stability
PT2236313E (en) * 2009-03-31 2012-08-10 Flooring Technologies Ltd Method for manufacturing panels and panels manufactured according to this method
EP2319671B1 (en) 2009-11-05 2014-03-26 Kronotec AG Manufacturing method for an OSB-panel
CN103118878B (en) * 2010-09-23 2016-01-20 地材科技有限公司 The manufacture method of panel and the panel according to the method manufacture
EP2939807B1 (en) 2014-05-02 2017-02-01 SWISS KRONO Tec AG Method and apparatus for manufacturing a wood fibreboard
PL3023261T3 (en) 2014-11-20 2017-12-29 Flooring Technologies Ltd. Method for finishing a wooden material panel
PL3216574T3 (en) 2016-03-10 2020-04-30 SWISS KRONO Tec AG Method for manufacturing an osb

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ES2633537T3 (en) 2017-09-21
EP1754583A1 (en) 2007-02-21
PL1754583T3 (en) 2017-10-31
DE102005038833A1 (en) 2007-02-22

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