WO2005002840A2 - Composite panel and method for the production thereof - Google Patents
Composite panel and method for the production thereof Download PDFInfo
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- WO2005002840A2 WO2005002840A2 PCT/EP2004/006282 EP2004006282W WO2005002840A2 WO 2005002840 A2 WO2005002840 A2 WO 2005002840A2 EP 2004006282 W EP2004006282 W EP 2004006282W WO 2005002840 A2 WO2005002840 A2 WO 2005002840A2
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- WIPO (PCT)
- Prior art keywords
- layer
- construction
- composite
- composite panel
- furniture
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
- B29C44/06—Making multilayered articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/56—After-treatment of articles, e.g. for altering the shape
- B29C44/569—Shaping and joining components with different densities or hardness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/04—Layered products comprising a layer of synthetic resin as impregnant, bonding, or embedding substance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/024—Woven fabric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/021—Fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/02—Synthetic macromolecular particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/02—Cellular or porous
- B32B2305/026—Porous
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2607/00—Walls, panels
Definitions
- the invention relates to a composite panel according to claim 1.
- Construction panels for the furniture and building materials industry with cellulose-containing components are primarily wood-based panels but also solid wood panels, gypsum fiber and plasterboard panels as well as calcium silicate panels and the like. These panels are used for a wide variety of purposes, such as in furniture and interior design, for interior doors, for packaging, in construction, etc. Porous wood-based panels are used for heat and sound insulation purposes.
- wood-based panels a distinction is made between wood chipboard and wood fiber boards as well as OSB and plywood boards.
- wood fiber boards shredded wood is hot pressed, for example by production in a hydrothermal pretreatment in a disc refiner, after the addition of synthetic binder.
- wood fiber boards can use the inherent cross-linking properties of the fiber material, with fiber matting being important.
- condensation resins as binders, for example urea-formaldehyde or melamine-formaldehyde or phenol-formaldehyde (formaldehyde resins) or polyaddition resins such as PMDI adhesives or mixtures of these resins.
- condensation resins for example urea-formaldehyde or melamine-formaldehyde or phenol-formaldehyde (formaldehyde resins) or polyaddition resins such as PMDI adhesives or mixtures of these resins.
- the size, shape and arrangement of the chips and the amount of synthetic resin content can vary the properties of the chipboard.
- High-quality chipboard is produced in multiple layers with particularly fine covering chips. It is also generally known to provide wood-based panels with single- or multi-layer coatings, for example melamine coatings, decorative films, funtions, etc.
- wood-based panels For example, their surface quality is essential for a surface coating. Mechanical properties such as compressive strength and bending stiffness are important for certain applications. Furthermore, the wood-based panels have to withstand weathering in certain areas of application or have moisture, fire or soundproofing properties that are matched to the application. Wood-based panels are also coated for optical reasons, but in particular in order to counter mechanical stresses or to form a protective layer against the effects of weather and radiation, and for example for scaffolding panels with anti-slip coatings and special concrete formwork panels with release properties.
- Flawed surfaces can also appear on plywood panels when inferior veneers are used.
- a single grinding process is usually not sufficient to achieve a surface that can be coated.
- the imperfections in the surface must be filled so that the imperfections in the subsequent coating do not appear on the surface finish through the coating material, or to prepare the material for a coating. Flaws of this type are filled, for example, by doctor blade systems in which the raw plate surface is filled with filler. After the filler has dried, the calibration is carried out.
- the invention has for its object to provide a composite panel on the basis of a construction panel for the furniture and construction sector, in particular a wood-based panel, which does not have the disadvantages mentioned above and can be provided with a desired surface without complex measures and, if necessary, has an excellent coatability.
- the composite panel according to the invention consists of at least two layers, e.g. a wood-based panel with a coarse, open-pore and / or porous surface structure and at least one second layer.
- the second layer is applied to at least one side of the construction board. It consists of a composite material which in turn consists of a web-like carrier material which is impregnated with a hardenable, not fully hardened resin and contains expandable thermoplastic particles and a solvent with not more than 40% by weight.
- Such a second layer is connected to the wood-based panel by heat and possibly by pressure.
- a composite as specified in claim 1, has become generally known from EP 0 647 182 B1. It is intended to be connected to one or more other laminate materials, for example a foamed plastic, a woven or non-woven organic or inorganic fiber material, an expanded metal or the like.
- the composite material forms the core layer, while the other laminate material is applied to the core layer on one or both sides.
- the application is done by hot pressing, whereby the semi-finished composite reacts and the thermoplastic particles, for example microspheres, expand and the resin cures.
- the invention provides for the use of such a composite on construction panels, in particular wood-based panels for the furniture and construction sectors, the properties and / or surfaces of which are significantly improved as a result.
- the composite Due to its properties, the composite is self-adhesive on the surface of the construction panel, the composite foaming during the hot pressing process due to the embedded thermoplastic particles.
- the second layer is therefore pressed by a heat-foaming, self-adhesive web reinforced with a carrier material under the action of heat and possibly pressure to form a coating on the surface of the construction panel.
- the second layer according to the invention can be placed as an additional layer on the ground or unground surface of the construction plate.
- the composite material is therefore glued and foamed with the addition of pressure and heat, so that a closed, calibrated and ready-to-coat surface is produced in one operation after the end of the process.
- the connection of the construction board, eg wood-based board, and composite material can take place in conventional pressure-controlled pressing devices or also in path-controlled pressing devices.
- a commercially available coating material self-adhesive or non-self-adhesive
- a commercially available coating material can also be placed on the second layer, so that a closed, calibrated and completely coated surface is produced with a pressing process.
- a surface is obtained which can be coated with any material, e.g. also with metal or plastics.
- a desired surface structure can be produced on a large scale, for example by pressing with embossing rollers or embossing sheets or negative molds, the embossing depth being able to exceed the thickness of the finish material. This is made possible by the foaming process of the second layer.
- Loose crystalline materials such as Quartz sand can be applied to the wood-based panel with the second layer.
- the composite acts as a primer film.
- the second layer serves as a water-repellent layer.
- Example 1 Composite on an unpolished OSB board
- OSB wood-based panel unground, gross density approx. 650 kg / m 3 , thickness 15 mm,
- OSB wood-based panel sanded, gross density approx. 650 kg / m 3 , thickness 15 mm,
- a wood material board is indicated, which can be a wood fiber or chipboard, an OSB board, a plywood board with a porous or uneven surface, as indicated at 12.
- a second layer 16 is applied to the uneven and possibly porous surface 12.
- the second layer is composed of a web-like carrier material, here a fleece, knitted fabric or fabric, as indicated at 16, which is impregnated with a hardenable resin and arranged in the microspheres 18, which expand when heated.
- Solvent is also contained in a proportion of not more than 40% by weight.
- Such a composite is disclosed in EP 0 647 182 B1.
- a third layer 20 is applied to the second layer 14, for example for decorative purposes, for optical reasons or the like. All three layers 10, 14 and 20 are connected to one another in one operation by the action of heat and possibly by pressure. The partially cured resin hardens and the microspheres 18 expand. In this way, a composite panel with the desired surface of predetermined thickness is obtained. As can be seen, the thickness can be varied within limits and, of course, can not be less than the maximum thickness of the wood-based panel 10. The thickness is limited at the top by the mechanical property of the second layer 14.
- the third layer 20 is not necessary, but rather can Composite panels can also be used with first and second layers. It is also possible to apply the second layer 14 on both sides of the wood-based panel 10.
- the second layer 16 has a maximum thickness of 6 mm.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Laminated Bodies (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
Description
Verbundplatte und Verfahren zur Herstellung einer Verbundplatte Composite panel and method of manufacturing a composite panel
Die Erfindung bezieht sich auf eine Verbundplatte nach dem Patentanspruch 1.The invention relates to a composite panel according to claim 1.
Konstruktionsplatten für die Möbel- und Baustoffindustrie mit cellulosehaltigen Bestandteilen sind vor allem Holzwerkstoffplatten aber auch Vollholzplatten, Gipsfaser und Gipskartonplatten sowie Kaliciumsilicatplatten und dergleichen. Diese Platten werden für die verschiedensten Zwecke eingesetzt, etwa im Möbel- und Innenausbau, bei Innentüren, für Verpackungszwecke, im Bauwesen usw.. Poröse Holzwerkstoffplatten werden für Wärme- und Schalldämmzwecke eingesetzt.Construction panels for the furniture and building materials industry with cellulose-containing components are primarily wood-based panels but also solid wood panels, gypsum fiber and plasterboard panels as well as calcium silicate panels and the like. These panels are used for a wide variety of purposes, such as in furniture and interior design, for interior doors, for packaging, in construction, etc. Porous wood-based panels are used for heat and sound insulation purposes.
Bei Holzwerkstoffplatten unterscheidet man unter anderem zwischen Holzspan- und Holzfaserplatten sowie OSB und Sperrholzplatten. Bei Holzfaserplatten wird zerfasertes Holz, beispielsweise durch Herstellung in einer hydrotherrnischen Vorbehandlung in einem Scheibenrefiner, nach Zugabe von synthetischem Bindemittel heiß verpreßt. Im Naßverfahren können Holzfaserplatten die inhärenten Verque- rungseigenschaften des Faserstoffes verwenden, wobei die Faserverfilzung von Bedeutung ist. Bei Holzspanplatten werden Holzspäne mit Kondensationsharzen als Bindemittel, beispielsweise Harnstoff-Formaldehyd oder Melamin-Formaldehyd oder Phenol-Formaldehyd (Formaldehyd-Harze) oder Polyadditionsharze wie PMDI-Klebstoffe oder Abmischungen aus diesen Harzen, warm verpreßt. Größe, Form und Anordnung der Späne und die Menge des Kunstharzanteils können die Eigenschaften der Holzspanplatten variieren. Hochwertige Spanplatten werden mehrschichtig mit besonders feinen Deckspänen hergestellt. Es ist auch allgemein bekannt, Holzwerkstoffplatten mit ein- oder mehrschichtigen Beschichtungen zu versehen, z.B. Melamin-Beschichtungen, Dekorfilmen, Funieren usw..In the case of wood-based panels, a distinction is made between wood chipboard and wood fiber boards as well as OSB and plywood boards. In the case of wood fiber boards, shredded wood is hot pressed, for example by production in a hydrothermal pretreatment in a disc refiner, after the addition of synthetic binder. In the wet process, wood fiber boards can use the inherent cross-linking properties of the fiber material, with fiber matting being important. In the case of wood chipboards, wood chips are hot-pressed with condensation resins as binders, for example urea-formaldehyde or melamine-formaldehyde or phenol-formaldehyde (formaldehyde resins) or polyaddition resins such as PMDI adhesives or mixtures of these resins. The size, shape and arrangement of the chips and the amount of synthetic resin content can vary the properties of the chipboard. High-quality chipboard is produced in multiple layers with particularly fine covering chips. It is also generally known to provide wood-based panels with single- or multi-layer coatings, for example melamine coatings, decorative films, funtions, etc.
An Holzwerkstoffplatten werden je nach Anwendung die verschiedensten Anforderungen gestellt. So ist z.B. ihre Oberflächenqualität wesentlich für eine Ober- flächenbeschichtung. Mechanische Eigenschaften wie Druckfestigkeit und Biege- steifigkeit sind für bestimmte Anwendungsfälle von Bedeutung. Ferner müssen die Holzwerkstoffplatten in bestimmten Anwendungsgebieten einer Bewitterung standhalten oder auf den Einsatz abgestimmte Feuchte-, Brand- oder Schallschutzeigenschaften aufweisen. Eine Beschichtung von Holzwerkstoffplatten erfolgt auch aus optischen Gründen, aber insbesondere, um mechanischen Beanspruchungen zu begegnen bzw. eine Schutzschicht vor Witterung- und Strahlungseinflüssen zu bilden sowie beispielsweise für Gerüstbauplatten mit Anti-Slip Beschichtungen sowie spezielle Betonschalungsplatten mit Releaseeigenschaften.Depending on the application, a wide range of requirements are placed on wood-based panels. For example, their surface quality is essential for a surface coating. Mechanical properties such as compressive strength and bending stiffness are important for certain applications. Furthermore, the wood-based panels have to withstand weathering in certain areas of application or have moisture, fire or soundproofing properties that are matched to the application. Wood-based panels are also coated for optical reasons, but in particular in order to counter mechanical stresses or to form a protective layer against the effects of weather and radiation, and for example for scaffolding panels with anti-slip coatings and special concrete formwork panels with release properties.
Insbesondere bei Holzwerkstoffplatten geringerer Dichte oder aus groben Partikeln, z.B. OSB, kommt es zu Fehlstellen an der Oberfläche. Oberflächen mit Fehlstellen können auch bei Sperrholzplatten entstehen, wenn minderwertige Furniere verwendet werden. Bei Holzwerkstoffplatten mit offenen Oberflächen reicht zumeist ein einziger Schleifprozeß nicht aus, um eine beschichtungsfähige Oberfläche zu erzielen. Zusätzlich zum Schleifprozeß müssen die Fehlstellen in der Oberfläche gefüllt werden, damit sich die Fehlstellen bei der nachfolgenden Beschichtung nicht durch den Beschichtungswerkstoff hindurch auf dem Oberflächenfinish abzeichnen, bzw. den Werkstoff auf eine Beschichtung vorzubereiten. Das Füllen derartiger Fehlstellen erfolgt z.B. durch Rakelanlagen, in denen die rohe Plattenoberfläche mit Spachtelmasse gefüllt wird. Nach dem Abtrocknen der Spachtelmasse erfolgt der Kalibrierschliff. Damit Holzwerkstoffplatten beschichtungsfähig werden, erhalten diese in einer speziellen Schleifeinrichtung einen in der Regel beidseitigen Oberflächenschliff (Kalibrierschliff). Dieser Schleifvorgang hat das Ziel, Unebenheiten der Werkstoffplatte zu beseitigen, eine einheitliche Dicke sicherzustellen sowie die Oberflächen- haftung für den Beschichtungswerkstoff zu verbessern und die damit einhergehende ausreichende Qualität der fertig beschichteten Oberfläche zu gewährleisten.In particular with wood-based panels of lower density or from coarse particles, eg OSB, there are imperfections on the surface. Flawed surfaces can also appear on plywood panels when inferior veneers are used. In the case of wood-based panels with open surfaces, a single grinding process is usually not sufficient to achieve a surface that can be coated. In addition to the grinding process, the imperfections in the surface must be filled so that the imperfections in the subsequent coating do not appear on the surface finish through the coating material, or to prepare the material for a coating. Flaws of this type are filled, for example, by doctor blade systems in which the raw plate surface is filled with filler. After the filler has dried, the calibration is carried out. To ensure that wood-based panels can be coated, they are given a surface sanding (calibration sanding) on both sides in a special grinding device. The aim of this grinding process is to remove unevenness in the material plate, to ensure a uniform thickness and to improve the surface adhesion for the coating material and to ensure the associated sufficient quality of the finished coated surface.
Dem Prozeß des Kalibrierschliffs schließt sich eine Obenflächenveredelung in Form der Beschichtung mit den verschiedensten Materialien an. Man unterscheidet zwischen natürlichen und künstlichen Beschichtungswerkstoffen, die unter Zugabe von Druck und Temperatur in einer Preßeinreichtung mit der Holzwerkstoffplatte verpreßt werden.The process of calibration grinding is followed by surface finishing in the form of a coating with a wide variety of materials. A distinction is made between natural and artificial coating materials, which are pressed with the wood-based panel in a press setup with the addition of pressure and temperature.
Neben den erwähnten Nachteilen bei der Herstellung beschichteter Holzwerkstoffplatten treten weitere hinzu. So kann es durch thermische- und hygrische Formänderungen an der mit einer Finishbeschichtung belegten Oberfläche der Holzwerkstoffplatte mangels ausreichender Steifigkeit zu Rissen kommen, die zu einer Entwertung der Platte fuhren. Werden über den Beschichtungen Holzwerkstoffplatten mit einer strukturierten Oberfläche versehen, beispielsweise durch eine Prägeform, so ist die Prägetiefe auf die Dicke der Finishschicht begrenzt ansonsten wird die darunterliegende Oberfläche zerstört. Ferner kann es bei der spanenden Bearbeitung der beschichteten Holzwerkstoffplatte zu Materialausbrüchen in den Schnittkanten kommen.In addition to the disadvantages mentioned in the production of coated wood-based panels, there are further disadvantages. Due to a lack of sufficient rigidity, cracks can occur due to thermal and hygric changes in shape on the surface of the wood-based panel covered with a finish coating, which lead to a devaluation of the panel. If wood-based panels are provided with a structured surface above the coatings, for example by means of an embossing mold, the embossing depth is limited to the thickness of the finish layer, otherwise the underlying surface is destroyed. Furthermore, material cutting in the cut edges can occur during the machining of the coated wood-based panel.
Der Erfindung liegt die Aufgabe zugrunde auf der Basis einer Konstruktionsplatte für den Möbel- und den Baubereich, insbesondere einer Holzwerkstoffplatte, eine Verbundplatte zu schaffen, welche die oben genannten Nachteile nicht aufweist und ohne aufwendige Maßnahmen mit einer gewünschten Oberfläche versehen und erforderlichenfalls hervorragend beschichtungsfähig ist.The invention has for its object to provide a composite panel on the basis of a construction panel for the furniture and construction sector, in particular a wood-based panel, which does not have the disadvantages mentioned above and can be provided with a desired surface without complex measures and, if necessary, has an excellent coatability.
Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.This object is achieved by the features of patent claim 1.
Die erfindungsgemäße Verbundplatte besteht aus mindestens zwei Schichten, z.B. einer Holzwerkstoffplatte mit grober, offenporiger und/oder poröser Oberflächenstruktur und mindestens einer zweiten Schicht. Die zweite Schicht ist auf mindestens auf einer Seite der Konstruktionsplatte aufgebracht. Sie besteht aus einem Verbundstoff, der seinerseits aus einem bahnartigen Trägermaterial besteht, das mit einem härtbaren nicht vollständig gehärteten Harz imprägniert ist und expandierbare thermoplastische Teilchen und ein Lösungsmittel mit nicht mehr als 40 Gew.-% enthält. Eine derartige zweite Schicht wird durch Hitze und ggf. durch Druck mit der Holz- werkstoffplatte verbunden.The composite panel according to the invention consists of at least two layers, e.g. a wood-based panel with a coarse, open-pore and / or porous surface structure and at least one second layer. The second layer is applied to at least one side of the construction board. It consists of a composite material which in turn consists of a web-like carrier material which is impregnated with a hardenable, not fully hardened resin and contains expandable thermoplastic particles and a solvent with not more than 40% by weight. Such a second layer is connected to the wood-based panel by heat and possibly by pressure.
Ein Verbundstoff, wie er in Patentanspruch 1 angegeben ist, ist allgemein aus der EP 0 647 182 Bl bekannt geworden. Er ist dafür gedacht, mit einem oder mehreren anderen Laminatmaterialien verbunden zu werden, beispielsweise einem geschäumten Kunststoff, einem gewebten oder nicht gewebten organischen oder anorganischen Fasermaterial, einem Streckmetall oder dergleichen. Dabei bildet der Verbundstoff die Kernschicht, während das andere Laminatmaterial auf die Kernschicht einseitig oder beidseitig aufgebracht wird. Das Aufbringen geschieht durch Warmpreßen, wobei der Halbfertigverbundstoff reagiert und die thermoplastischen Teilchen, beispielsweise Mikrokügelchen, expandieren und das Harz aushärtet. Die Erfindung sieht die Anwendung eines derartigen Verbundstoffes auf Konstruktionsplatten, insbesondere Holzwerkstoffplatten für den Möbel- und Baubereich vor, deren Eigenschaften und/oder deren Oberflächen dadurch signifikant verbessert werden. Aufgrund seiner Eigenschaften ist der Verbundstoff auf der Oberfläche der Konstruktionsplatte selbstklebend, wobei während des Warmpressprozess der Verbundstoff wegen der eingelagerten thermoplastischen Teilchen aufschäumt. Mithin wird die zweite Schicht von einer bei Hitze aufschäumenden selbstklebenden und mit einem Trägermaterial bewehrten Bahn unter Einwirkung von Wärme und ggf. von Druck zu einer Beschichtung auf der Oberfläche der Konstruktionsplatte verpreßt. Die zweite Schicht nach der Erfindung kann als zusätzliche Lage auf die geschliffene oder ungeschliffene Oberfläche der Konstruktionsplatte aufgelegt werden. In der Presse erfolgt mithin unter Zugabe von Druck und Hitze das Verkleben und Aufschäumen des Verbundwerkstoffes, so daß nach Beendigung des Vorgangs eine geschlossene, kalibrierte und beschichtungsfertige Oberfläche in einem Arbeitsgang entsteht. Die Verbindung von Konstruktionsplatte, z.B. Holzwerkstoffplatte, und Verbundstoff kann in herkömmlichen druckgesteuerten Presseinrichtungen oder auch in weggesteuerten Presseinrichtungen erfolgen.A composite, as specified in claim 1, has become generally known from EP 0 647 182 B1. It is intended to be connected to one or more other laminate materials, for example a foamed plastic, a woven or non-woven organic or inorganic fiber material, an expanded metal or the like. The composite material forms the core layer, while the other laminate material is applied to the core layer on one or both sides. The application is done by hot pressing, whereby the semi-finished composite reacts and the thermoplastic particles, for example microspheres, expand and the resin cures. The invention provides for the use of such a composite on construction panels, in particular wood-based panels for the furniture and construction sectors, the properties and / or surfaces of which are significantly improved as a result. Due to its properties, the composite is self-adhesive on the surface of the construction panel, the composite foaming during the hot pressing process due to the embedded thermoplastic particles. The second layer is therefore pressed by a heat-foaming, self-adhesive web reinforced with a carrier material under the action of heat and possibly pressure to form a coating on the surface of the construction panel. The second layer according to the invention can be placed as an additional layer on the ground or unground surface of the construction plate. In the press, the composite material is therefore glued and foamed with the addition of pressure and heat, so that a closed, calibrated and ready-to-coat surface is produced in one operation after the end of the process. The connection of the construction board, eg wood-based board, and composite material can take place in conventional pressure-controlled pressing devices or also in path-controlled pressing devices.
Auf die erfindungsgemäße Verbundplatte kann zusätzlich ein handelsüblicher Beschichtungs werkstoff (selbstklebend oder nicht selbstklebend) auf die zweite Schicht gelegt werden, so daß mit einem Preßvorgang eine geschlossene, kalibrierte und fertig beschichtete Oberfläche entsteht.On the composite panel according to the invention, a commercially available coating material (self-adhesive or non-self-adhesive) can also be placed on the second layer, so that a closed, calibrated and completely coated surface is produced with a pressing process.
Bei der erfindungsgemäßen Verbundplatte bzw. bei dem Verfahren zu ihrer Herstellung ergeben sich weitere Vorteile:The composite panel according to the invention and the method for its production have further advantages:
Auch sehr grobe Oberflächenstrukturen, z.B. bei Holzwerkstoffplatten, können ggf. ohne Vorhandlung eine Beschichtung erhalten, wobei die Oberfläche nach dem Aufschäumvorgang gute haptische Eigenschaften aufweist. - Durch das Aufbringen der zweiten Schicht nach der Erfindung erhält die Verbundplatte eine verbesserte Zug- und Biegesteifigkeit. Ferner wird das Entstehen von Oberflächenrissen aufgrund thermischer oder hygrisch bedingter Formänderungen unterbunden.Even very coarse surface structures, for example in the case of wood-based panels, can optionally be given a coating without being present, the surface having good haptic properties after the foaming process. - The application of the second layer according to the invention gives the composite panel improved tensile and flexural strength. Furthermore, the formation of surface cracks due to thermal or hygric changes in shape is prevented.
- Die Bearbeitbarkeit der Verbundplatte wird vereinfacht. Kantenbruch bei spanender Bearbeitung, z.B. Formatierungsschnitten, wird verhindert.- The workability of the composite panel is simplified. Edge breakage during machining, e.g. Formatting cuts is prevented.
- Durch das Aufbringen der Schicht nach der Erfindung wird eine Oberfläche erhalten, die mit einem beliebigen Material beschichtet werden kann, z.B. auch mit Metall oder Kunststoffen.- By applying the layer according to the invention, a surface is obtained which can be coated with any material, e.g. also with metal or plastics.
- Durch zusätzliches Einlegen weiterer Vliese, Gewebe oder dergleichen können die mechanischen Eigenschaften der Verbundplatte signifikant verbessert werden.- The additional properties of the nonwovens, fabrics or the like can significantly improve the mechanical properties of the composite panel.
Durch das Aufbringen der erfindungsgemäßen zweiten Schicht läßt sich in großem Umfang eine gewünschte Oberflächenstruktur etwa durch Verpressen mit Prägewalzen oder Prägeblechen oder Negativformen herstellen, wobei die Prägetiefe die Dicke des Finishwerkstoffes übersteigen kann. Dies ist durch den Aufschäumprozeß der zweiten Schicht ermöglicht.By applying the second layer according to the invention, a desired surface structure can be produced on a large scale, for example by pressing with embossing rollers or embossing sheets or negative molds, the embossing depth being able to exceed the thickness of the finish material. This is made possible by the foaming process of the second layer.
Lose kristalline Materialien, wie z.B. Quarzsand, können mit der zweiten Schicht auf die Holzwerkstoffplatte aufgebracht werden.Loose crystalline materials such as Quartz sand can be applied to the wood-based panel with the second layer.
Direktes Beschichten mit handelsüblichen Flüssigbeschichtungen, z.B. Lacksystemen, ist möglich zur Herstellung fertiger Oberflächen. Es sind keine vorbehandelnden Schritte, z.B. Schleifen oder Grundieren, notwendig. Der Verbundstoff fungiert als Grundierfilm. Bei der erfindungsgemäßen Verbundplatte dient die zweite Schicht als wasserabweisende Schicht.Direct coating with commercially available liquid coatings, such as paint systems, is possible for the production of finished surfaces. No pre-treatment steps, e.g. sanding or priming, are necessary. The composite acts as a primer film. In the composite panel according to the invention, the second layer serves as a water-repellent layer.
Nachstehend werden einige Beispiele für die erfindungsgemäße Verbundplatte angeführt:Below are some examples of the composite panel according to the invention:
Beispiel 1: Verbundstoff auf ungeschliffener OSB-PlatteExample 1: Composite on an unpolished OSB board
Ausgangsstoffe:Starting materials:
Verbundstoff: Rohdichte 210 kg/m3, davon 55 kg/m3 Glasfaservlies, Feuchtegehalt ca. 12 %, Aufschäumkapazität 1 mmComposite: gross density 210 kg / m 3 , of which 55 kg / m 3 glass fiber fleece, moisture content approx. 12%, foaming capacity 1 mm
OSB Holzwerkstoffplatte: ungeschliffen, Rohdichte ca. 650 kg/m3, Dicke 15 mm,OSB wood-based panel: unground, gross density approx. 650 kg / m 3 , thickness 15 mm,
Feuchtegehalt 6 - 12 % (in Abhängigkeit von Lagerdauer und -klima)Moisture content 6 - 12% (depending on storage time and climate)
Pressparameter:Press parameters:
Druck: 1,0 N/mm2, Presszeit 90 sec, Temperatur 140 °CPressure: 1.0 N / mm 2 , pressing time 90 sec, temperature 140 ° C
Beispiel 2: Verbundstoff auf geschliffener OSB-PlatteExample 2: Composite on sanded OSB board
Ausgangsstoffe:Starting materials:
Verbundstoff: Rohdichte 210 kg/m3, davon 55 kg/m3 Glasfaservlies, Feuchtegehalt ca. 12 %, Aufschäumkapazität 1 mmComposite: gross density 210 kg / m 3 , of which 55 kg / m 3 glass fiber fleece, moisture content approx. 12%, foaming capacity 1 mm
OSB Holzwerkstoffplatte: geschliffen, Rohdichte ca. 650 kg/m3, Dicke 15 mm,OSB wood-based panel: sanded, gross density approx. 650 kg / m 3 , thickness 15 mm,
Feuchtegehalt 6 - 12 % (in Abhängigkeit von Lagerdauer und -klima).Moisture content 6 - 12% (depending on storage time and climate).
Anhand eines in einer Zeichnung dargestellten Ausführungsbeispiels soll die Erfindung näher erläutert werden.The invention will be explained in more detail with reference to an embodiment shown in a drawing.
Die einzige Figur zeigt im Schnitt einen Teil einer Verbundplatte nach der Erfindung. Bei 10 ist in der Figur eine Holzwerkstoffplatte angedeutet, die eine Holzfaser- oder Holzspanplatte, eine OSB-Platte, eine Sperrholzplatte sein kann mit poröser bzw. unebener Oberfläche, wie bei 12 angedeutet. Auf die unebene und ggf. poröse Oberfläche 12 ist eine zweite Schicht 16 aufgebracht. Die zweite Schicht setzt sich zusammen aus einem bahnartigen Trägermaterial, hier ein Vlies, Gewirk oder Gewebe, wie bei 16 angedeutet, das mit einem härtbaren Harz imprägniert ist und in dem Mikrokügelchen 18 angeordnet sind, die bei Wärme expandieren. Ferner ist Lösungsmittel enthalten in einem Anteil von nicht mehr als 40 Gew.-%. Ein derartiger Verbundstoff ist in EP 0 647 182 Bl offenbart. Auf der zweiten Schicht 14 ist eine dritte Schicht 20 aufgebracht, beispielsweise zu Dekorzwecken, aus optischen Gründen oder dergleichen. Alle drei Schichten 10, 14 und 20 werden in einem Arbeitsgang durch Einwirkung von Wärme und ggf. durch Druck miteinander verbunden. Dabei härtet das teilweise ausgehärtete Harz aus und die Mikrokügelchen 18 expandieren. Auf diese Weise wird eine Verbundplatte mit gewünschter Oberfläche vorgegebener Dicke erhalten. Wie erkennbar, kann die Dicke in Grenzen variiert werden und naturgemäß nicht kleiner sein als die maximale Dicke der Holzwerkstoffplatte 10. Nach oben hin ist die Dicke begrenzt durch die mechanische Eigenschaft der zweiten Schicht 14. Die dritte Schicht 20 ist keine Notwendigkeit, vielmehr kann die Verbundplatte auch mit erster und zweiter Schicht eingesetzt werden. Es ist auch möglich, die zweite Schicht 14 auf beiden Seiten der Holzwerkstoffplatte 10 aufzubringen.The single figure shows in section a part of a composite panel according to the invention. At 10 in the figure, a wood material board is indicated, which can be a wood fiber or chipboard, an OSB board, a plywood board with a porous or uneven surface, as indicated at 12. A second layer 16 is applied to the uneven and possibly porous surface 12. The second layer is composed of a web-like carrier material, here a fleece, knitted fabric or fabric, as indicated at 16, which is impregnated with a hardenable resin and arranged in the microspheres 18, which expand when heated. Solvent is also contained in a proportion of not more than 40% by weight. Such a composite is disclosed in EP 0 647 182 B1. A third layer 20 is applied to the second layer 14, for example for decorative purposes, for optical reasons or the like. All three layers 10, 14 and 20 are connected to one another in one operation by the action of heat and possibly by pressure. The partially cured resin hardens and the microspheres 18 expand. In this way, a composite panel with the desired surface of predetermined thickness is obtained. As can be seen, the thickness can be varied within limits and, of course, can not be less than the maximum thickness of the wood-based panel 10. The thickness is limited at the top by the mechanical property of the second layer 14. The third layer 20 is not necessary, but rather can Composite panels can also be used with first and second layers. It is also possible to apply the second layer 14 on both sides of the wood-based panel 10.
Die zweite Schicht 16 hat im fertigen Zustand eine maximale Dicke von 6 mm. In the finished state, the second layer 16 has a maximum thickness of 6 mm.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10329727A DE10329727A1 (en) | 2003-07-01 | 2003-07-01 | Composite panel and method of making a composite panel |
| DE10329727.8 | 2003-07-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2005002840A2 true WO2005002840A2 (en) | 2005-01-13 |
| WO2005002840A3 WO2005002840A3 (en) | 2005-05-26 |
Family
ID=33559794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2004/006282 Ceased WO2005002840A2 (en) | 2003-07-01 | 2004-06-11 | Composite panel and method for the production thereof |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE10329727A1 (en) |
| WO (1) | WO2005002840A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007114786A1 (en) * | 2006-04-04 | 2007-10-11 | Andersson Composite Technologies Ab | Web-like or sheet-like semi-finished product, polymeric foam composite material and plate and method for production thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH521849A (en) * | 1971-03-19 | 1972-04-30 | Alusuisse | Composite panel |
| SE436332B (en) * | 1980-05-21 | 1984-12-03 | Kema Nord Ab | FOAM COMPOSITION MATERIAL FOR MANUFACTURING LAMINATE AND ITS USE AS A LAYOUT |
| SE508051C2 (en) * | 1991-06-12 | 1998-08-17 | Glasis Ab | Composite materials and their use and process for their preparation |
| WO1999015582A1 (en) * | 1997-09-22 | 1999-04-01 | Siemens Aktiengesellschaft | Duro-plastic composite material with expandable hollow microspheres and use of the same for encapsulation |
| DE19939227B4 (en) * | 1999-08-18 | 2004-07-29 | Möller Plast GmbH | Composite material |
-
2003
- 2003-07-01 DE DE10329727A patent/DE10329727A1/en not_active Withdrawn
-
2004
- 2004-06-11 WO PCT/EP2004/006282 patent/WO2005002840A2/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007114786A1 (en) * | 2006-04-04 | 2007-10-11 | Andersson Composite Technologies Ab | Web-like or sheet-like semi-finished product, polymeric foam composite material and plate and method for production thereof |
| US7943233B2 (en) | 2006-04-04 | 2011-05-17 | Andersson Composite Technologies Ab | Web-like or sheet-like semi-finished product, polymeric foam composite material and plate and method for the production thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10329727A1 (en) | 2005-02-03 |
| WO2005002840A3 (en) | 2005-05-26 |
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