DE102009045194A1 - Producing a wooden material, comprises adjusting the moisture content in a veneer of wood, arranging the wooden material by placing at least one veneer between at least two plastic films, and evaporating water from the veneer - Google Patents

Abstract

Producing a wooden material (1), comprises adjusting the moisture content in a veneer (2) of wood; arranging the wooden material by placing at least one veneer between at least two plastic films (3); and evaporating water from the veneer, so that the veneer is at least partially disintegrated into fibers. Independent claims are also included for: (1) the wooden material, comprising at least one veneer, which is arranged between two plastic films, where the veneer is at least partially disintegrated; (2) molding a component of the wooden material having at least partially disintegrated veneer, which is arranged between at least two plastic films, comprising placing the wooden material in a mold, closing the mold, deforming the wooden material under the influence of pressure and temperature to form the component, and cooling of the component; and (3) the component of the wooden material, which is molded in three dimensions.

Description

The invention relates to a method for producing a wood material, a wood material, a method for molding a component of this wood material and a component of this wood material.

Wood-based materials that are produced using veneers made of real wood are known. Plywood, for example, consists of glued veneers. In addition, numerous materials are known, which are constructed in the form of layer or composite materials from a combination of veneers and plastic films.

In layer materials, veneers and plastic films are processed in layers. Veneers and foils touch each other in recognizable layers. The WO 2008/007 360 describes such a typical product. Also the FR 2 868 733 and the DE 41 10 640 and the DE 10 2004 007 543 describe processes and products in which it is desired to transfer veneers undamaged, in particular with undamaged surface or optics in coating materials. As a rule, plastic films and veneers are layered and then compressed in the area of the softening temperature or melting temperature of the film under elevated pressure and then cooled. A disadvantage of these coating materials is that bending, which does not take place parallel to the fiber running direction of the veneer, is hardly possible without the veneer breaking. Fibers are extremely long in relation to the diameter. Bending about an axis parallel to the fiber direction (longitudinal direction of the fiber) can be done with small bending radii without a breakage of fibers being visible. Bending about an axis that is not parallel to the fiber direction is either possible only with very large bending radii or the deformation requires special measures.

Alternatively, composite materials are proposed in which plastic is introduced into a veneer layer. The result is a material in which individual layers can no longer be clearly identified. The WO 96/32257 describes a method in which the outer layers of a veneer are crushed so that they can be better impregnated with synthetic resin. The US 2002/0142 145 describes the impregnation of an extremely thin veneer with plastic, describes the similar JP 61-197 226 , The production of veneers with a thickness between 0.075 mm and 0.25 mm is very expensive. If such thin veneers are processed, which are completely impregnated with synthetic resin, they often no longer give the impression of real wood.

A disadvantage of the products described above is that the coating materials are not sufficiently flexible, and that the composite materials are expensive to manufacture.

It is therefore an object of the invention to provide an inexpensive material that allows a good three-dimensional deformability of a veneer.

This object is achieved with a method for producing a wood-based material according to claim 1, a wood material, a method for processing the wood material with the aim to produce a finished component and with a component made of the wood material according to the invention, and that is three-dimensionally bent ,

• – der Feuchtegehalt des Furniers aus Holz eingestellt wird,
• – der Holzwerkstoff durch Anordnen mindestens eines Furniers zwischen mindestens zwei Kunststofffolien aufgebaut wird, und dass
• – Wasser aus dem Furnier verdampft wird, so dass das Furnier mindestens teilweise in Fasern zerlegt wird.

The inventive method provides that

• - the moisture content of the veneer is set out of wood,
• - The wood material is constructed by arranging at least one veneer between at least two plastic films, and that
• - Water is evaporated from the veneer, so that the veneer is at least partially decomposed into fibers.

The evaporation of the water contained in the veneer, the veneer is at least partially decomposed into fibers. However, according to an advantageous embodiment of the method, the fibers are not removed from their existing order. In this embodiment, the fibers reproduce the previous structure of the veneer, without any cracks or joints becoming visible between the separated fibers. Alternatively, the fibers of the veneer can also change their position between the plastic films, if they z. B. entrained after the release of the fiber composite by the escaping steam. The evaporation of the water and the escape of water vapor creates a wood material in which the plastic films and the wood fibers or the veneer are firmly connected.

The evaporation of the water is done by adjusting pressure and temperature. In practice, a pressure above ambient pressure and a temperature above ambient temperature are usually set to to achieve evaporation of the water. The increased pressure will usually be set in a press, in which also the desired temperature can be set. In principle, however, any pressure and temperature can be set, which lead to the evaporation of the water.

Already the partial dissolution of the fiber composite leads to the fact that the wood material produced according to the invention can be shaped extremely well. Both about an axis that is parallel to the fiber direction as well as about axes that are not parallel, z. B. perpendicular to the length of the fiber, the wood material of the invention is to bend with tight radii easily, without causing breaks or cracks in the fibers or fiber composites. With the method according to the invention, it is possible to achieve bending radii of 30 mm in one step of forming. Narrow bending radii can be achieved if z. B. with multi-stage pressing a steady reduction of the bending radius is achieved. According to the invention, therefore, a wood material is provided which is easy to produce, which preserves the optical effect of the veneer made of real wood and which can be very flexibly processed into a three-dimensional component. The bending can be done, for example, in such a way that the at least three-ply wood material is formed as a sheet, and that the sheet is bent centrally and transversely to the fiber direction, so that two partial surfaces of the sheet-shaped wood material are folded 180 ° to each other and lie one above the other.

For the production of the wood material according to the invention, it is expedient that the veneer is not completely dry but contains a certain amount of water or liquid. This is stated as the moisture content, ie as the proportion of the water or the liquid in the total mass of the veneer. The water or liquid is needed to produce the steam for defibration. The steam separates at least individual fibers of the veneer from each other, so that the planar veneer is broken down into individual sections or lots.

The amount of water or liquid contained in the veneer significantly affects the extent to which the veneer is fiberized. Little water or liquid causes only a slight defibration, in which essentially remains in the batches or sections of the veneer, the original image of the veneer. Much water often causes the fibers to shift due to the large volume of vapor generated under the action of pressure and heat. Under certain circumstances, then the original image of the veneer is no longer preserved, z. If too much steam is released too quickly. As a result, at least sections or parts of the veneer no longer provide the original image of the veneer. This change in appearance of the veneer or veneers can be used specifically for optical effects.

The moisture content of the veneer is preferably in a known manner, for. B. set by drying, humidifying and / or storage in a defined climate environment in a range between 5% moisture content and fiber moisture saturation. The fiber saturation moisture is reached when the veneer is so saturated with moisture that just no free-flowing water is present in the cells of the veneer. Technically, it is also possible to achieve a mostly partial defibration of the veneer with a lower moisture content, but the effect is less pronounced at a moisture content below 5%. On the other hand, it is also possible to achieve a defibration of the veneer with a moisture content that is above the fiber saturation. However, then arise such amounts of steam that it can lead to a shift of fibers or fiber bundles in the veneer. Although this may be desired in some cases for design reasons, but is usually not provided.

In the preferred range of moisture content, the extent of defibration of the veneer can be controlled particularly precisely. In coordination with the respectively selected pressure and the temperature, the time or period of evaporation can be set well and precisely with just a few tests. Likewise, it can be adjusted whether the fibers of the veneer are separated from each other without causing visible gaps between the fibers or fiber bundles. Alternatively, the evaporation of the water can be adjusted so that the fibers or fiber bundles of the veneer, although separated, but not further spatially separated from each other. Thus, the visual impression of a veneer is maintained unchanged. It is to be regarded as a particular advantage of the method according to the invention that both options are given, namely to obtain an unchanged veneer appearance or to create a new look after the disassembly of the veneer into fibers or fiber bundles, are visible in the spaces between the fibers or fiber bundles ,

The veneer, which is placed between the plastic films to be at least partially broken down into fibers, is limited in terms of veneer strength only by technical parameters. The veneer must be at least as thin that it is manageable. It may be as strong as possible that the setting of the moisture content and the evaporation of the water is still controllable. Preferably, the veneer has a Thickness of up to 10 mm. For veneers made of particularly high density wood, it may be possible to process only veneers up to 5 mm thick. Commercially available veneers with a thickness of between 0.5 mm and 2 mm, usually around 1 mm, can be used in any case for the method according to the invention. For these veneers, the moisture content can be adjusted quickly and precisely.

Veneers of various types of wood can be used in the context of the inventive production of a wood material. This is important because it is preferred to use real wood veneers with a particularly decorative character for decorative components. Decorative real wood veneers such. As maple, oak, ash or walnut, but also veneers tropical woods (teak, mahogany) or conifers can be used for the production of wood materials by this method.

Since the evaporation of the water for carrying out the method according to the invention is essential, the production of the wood material is carried out at least at a temperature which is above the respective boiling point of the water. In order to accelerate the escape of the vapor, significantly higher temperatures are often set in practice. Temperatures above 150 ° C, preferably above 170 ° C, often up to 220 ° C, ensure that the veneer is heated quickly, allowing the evaporation of the water and the movement or escape of the vapor quickly and, above all, evenly across both the starch of the veneer as well as over the surface of the veneer. The movement of the steam in the veneer causes the above-described effects of the looseness of the fiber structure or the release of fibers from each other. The escape of the steam from the veneer or from the wood material finally takes place over the narrow side edges of the veneer, which are not covered by plastic film. It has been found that under otherwise the same conditions higher temperatures produce a stronger defibration. However, the temperature has, according to previous experiments, no influence on the flexibility of the wood-based material produced.

Since the production of the wood material takes place simultaneously under increased pressure, pressure and temperature for the production of a specific wood-based material are matched to each other. The lower limits for the temperature are given by the boiling point of the water, the lower limits for the pressure are where sufficient force opposes the escaping steam, so that a material is formed in which plastic films and veneer are interconnected. Upper limits are set by economic considerations and the resilience of plastic films and veneer.

Typical values for the pressure, which acts on the wood material to be produced during the escape of steam, are between 5 N / mm ² and 100 N / mm ² , preferably between 20 N / mm ² and 30 N / mm ² . In this area, the structure of the veneered in the plastic films, at least partially defibered veneer and the extent of fiberization can be adjusted particularly well. If the pressure is below 5 N / mm ² , under certain circumstances no sufficiently strong bond develops between the plastic film and veneer or fibers. A pressure of more than 100 N / mm ² often requires uneconomically complex presses. At the same time it has to be taken into account that, under otherwise equal conditions, with increasing pressure during the production of the wood-based material the defibration becomes more uneven. The stronger defibration initially occurs in the edge areas of the veneer, the inner areas remain initially ordered.

Since the escape of steam is a prerequisite for the production of the wood material, short reaction times are sufficient. The vaporization of the water does not take more than 30 minutes for strong veneers with a high moisture content. As a rule, reaction times of up to 10 minutes are sufficient; usually the escape of steam has taken place in up to two minutes. If, under otherwise identical conditions, the pressing time is prolonged, the sheet or veneer made of wood is more defibered. On the flexibility has a prolonged pressing time has no effect.

Numerous plastic films can be used to produce the wood-based material according to the invention. The plastic films have to meet only a few requirements: they must withstand the pressure and temperature that prevail during the evaporation of the water and they must subsequently adhere to the veneer, so that a layer material is formed. Plastic films can z. B. can be selected according to whether they act after processing into a layer material particularly transparent or whether they develop a special visual effect, eg. B. are colored or whether they develop a special technical effect, eg. B. are scratch resistant.

In particular, thermoplastic films, z. As polyethylene (PE) or polypropylene (PP) are suitable for use in the process according to the invention. But also thermosetting films such. B. melamine films are quite suitable. Inventive wood materials, which are produced with thermosetting films, set reaction conditions during the evaporation of water from the veneer leading to a joining of veneer and plastic films, but do not lead to complete curing of the thermosetting plastic films. Thus, a storable and manageable intermediate product is produced, which is only exposed to a pressure and a temperature during the molding of a three-dimensional object, which leads to a complete curing of the thermosetting plastic films.

Plastic films of different thicknesses can be used. The plastic films must be thick enough to be suitable for processing by the method of the invention and they must be thin enough so as not to unnecessarily hinder the heat transfer into the wet veneer. Typical are films with a thickness of 10 microns up to 2000 microns. In practice, plastic films are often used, which have a thickness of 20 microns to 50 microns. Such films are usually strong enough to be easily processed. They are sufficiently thick to ensure protection of the surface, on the other hand, they are sufficiently thin to ensure the most desired transparency of the surface coating. The thickness of the film web influences the extent of fiberization under otherwise identical processing conditions, but also on the position of the separated fibers or fiber bundles after the escape of the water vapor. In general, it can be said that a thicker film leads to stronger displacements of the fibers or fiber bundles, which are dissolved out of the composite of the veneer.

According to a further improved embodiment of the invention, means for absorbing ultraviolet radiation are added to the plastic films. This addition works in two ways. On the one hand, these known substances considerably improve the heat transfer to the real wood veneer when plastic films and veneer are heated together by means of UV radiation. Since only a small mass is to be heated overall, and since the proportion of plastic films is high, in this way a particularly rapid and penetrating heating of the layers of the wood material to be produced is achieved. On the other hand, the plastic films are prepared in such a way that they protect the veneer they cover from the effect of UV radiation and, of course, the plastic film itself is also protected against the action of UV rays.

Further, the plastic films may be colored. For example, they may have a color layer on a surface or they may be colored through. It is possible to use dyes which are immutable under the action of pressure and temperature or which develop their color at elevated pressure and / or elevated temperature.

However, the wood-based material according to the invention is not only suitable for thin, three-layered designs. This embodiment is merely to be regarded as the simplest, basic embodiment of the method or of the product resulting therefrom. The three-layered embodiment described above can be supplemented by at least one further veneer and at least one further plastic film. The arrangement of veneers and plastic films is in each case such that the outer layers or layers of the wood material are formed from plastic films. Alternating between veneers and other plastic films are arranged. In the manufacture of the wood material, the veneers may be arranged with the fiber flow in the same or in alternating directions.

In general, veneers and plastic films for carrying out the method according to the invention may be identical or different. So z. For example, the veneers have different thickness or the plastic films may have different properties. For example, they can be made of different materials. Thus, the plastic film that forms the surface or the outer surface of the material, particularly well absorb UV radiation, while the plastic film, which forms the other outer surface is formed particularly well adhesive, so that the material is easy to laminate to other surfaces ,

The invention further relates to a wood material comprising at least one veneer, which is arranged between two plastic films, wherein the veneer is at least partially defibrated. Ways of producing such a wood material are described above, as well as the individual components (plastic films and veneer) are described in various embodiments above. The features described include, among other things, the thickness of the veneer integrated in the wood material and the type and thickness of the plastic films used. In particular, a wood material is described above, in which the simplest embodiment of the wood material according to the invention, namely a veneer arranged between two plastic films, is supplemented in such a way that at least one veneer and a plastic film are more integrated into the wood material. Plastic films form the outer layers, ie the surfaces of the wood material. The veneers are arranged inside. They are each separated by a plastic film. The veneers are at least partially defibred.

The wood material according to the invention is characterized in that it is easily bendable without showing any visible cracks or compressions with the naked eye. In particular, bending around tight radii and / or bending by up to 180 ° are readily possible. The appearance of the veneer is not disturbed by cracks or compression. Bending around tight radii is often a criterion when creating surfaces with apertures, e.g. B. keyboards. In order to avoid sharp edges in the field of vision or grip area of the wood material is bent. It is advantageous if no cracks or compressions occur at these visible edges or grip edges.

Bending of the wood-based material according to the invention can go so far that two partial surfaces of the wood-based material are parallel to each other after bending at a close distance. This can be achieved with single-stage pressing at a radius of at least 30 mm, with multi-stage pressing smaller radii can be achieved.

According to the invention it is also possible to produce the wood material directly as a three-dimensionally shaped component. For this purpose, plastic films and real wood veneer are arranged in a press, which is not equipped with flat press plates but with negatives of the molds or components to be produced. In connection with the above-described heating by means of UV radiation, for. B. a membrane press can be used to produce both flat wood materials as well as molded components.

• – Anordnen des Holzwerkstoffs in einer Form
• – Schließen der Form
• – Verformen des Holzwerkstoffs unter Einwirkung von Druck und Temperatur zu einem Bauteil
• – Kühlen des Bauteils.

The invention further relates to a method for forming a component from a wood material, comprising at least one at least partially defibered veneer, which is arranged between at least two plastic films, with the steps:

• - Arranging the wood material in a mold
• - closing the mold
• - Deformation of the wood material under the influence of pressure and temperature to a component
• - cooling the component.

With the method according to the invention, the wood material described above is used to produce a component. It is a particular advantage of the wood material according to the invention that it can be formed not only directly in the production but also subsequently to a three-dimensional component. According to the invention, first blanks or semi-finished products can be produced, which then also allow the economical production of small series or individual pieces according to the method for molding a component.

The method for molding a component can be carried out in a simple and economical manner if the deformation of the wood material takes place at a pressure of at least 0.1 N / mm ² , preferably at least 0.2 N / mm ² . Advantageously, a pressure of 0.4 to 0.9 N / mm ^{2 is} used. A pressure of up to 1.0 N / mm ² and more is also possible to make the components. However, a pressure of more than 1.0 N / mm ^{2 is} usually not necessary for economic reasons.

Furthermore, it is expedient to perform the molding of a component at elevated temperatures (above 20 ° C). This speeds up the shaping process. Preferably, a temperature of above 90 ° C, advantageously set above 120 ° C. A temperature of over 160 ° C is usually not required to achieve the subsequent deformation of the wood material. Higher temperatures can technically be achieved and used, but they increasingly lead to an often undesirable discoloration of the wood material. A combination of pressure and temperature makes the process particularly efficient, because the deformation can be carried out in a short time.

The above-mentioned conditions for pressure and temperature are in the range of what conventional presses or molding tools do. The wood material according to the invention can therefore be processed with existing tools or production equipment. In this case, presses can be used both with a one-piece mold and with two-part molds. In particular membrane presses can be advantageously used for the production and deformation of the wood material according to the invention.

The cooling of the component is expedient because it ensures the dimensional stability of the three-dimensionally deformed wood material. The cooling preferably takes place in the mold (passive cooling). Again, it should be noted that existing tools and production equipment are usually equipped with means for cooling (active cooling), so that existing production equipment and tools for the inventive method can be used.

In an advantageous development of the method according to the invention, partial surfaces of the wood-based material are deformed or bent. Typically, for example, edges are rounded. It is further preferred that the radius in the transition to the curved partial surface of the wood material is at least 10 mm.

Before or during pressing cutouts can be formed in the wood material to be produced or in the component to be produced, for. B. by sawing, cutting or punching. The double-sided plastic coating and the at least partially shredded veneer can be processed neatly, so that even components with numerous openings in high quality and aesthetically pleasing can be made.

Finally, the invention comprises a component made of a wood material having at least one at least partially defibered veneer, which is arranged between two plastic films, wherein this component is formed in three dimensions. One possible way of producing the component according to the invention is described above. The component can be used for structural purposes, for example as a profiled panel, door frame or door leaf, as a handle for doors or containers, as well as a seat for benches or chairs. But it can also be used above all for decorative purposes, eg. B. for trays, containers, also for housing. In particular, for high-quality housings which have passages for keys, such as keyboards, remote controls, telephones, mobile telephones and the like, the components described above can be used.

In this case, the component according to the invention can be used directly as a wall of a housing. But it can also be glued as a decorative element on the wall of the housing, snapped or secured in any other way.

Essential details of the invention are explained in more detail below with reference to an embodiment. Show it:

1 a schematic representation of the structure of the material according to the invention,

2 a schematic representation of a component according to the invention.

1 shows a wood material 1 made of plastic films 3 and real wood veneers 2 is constructed. From bottom to top is first a polyethylene film 3 of 20 microns thickness arranged. On it will be a first oak veneer 2 of 0.5 mm thickness. On the first oak veneer is a same polyethylene film 3 20 μm thick. On it lies a second oak veneer 2 of 0.5 mm thickness. Finally, there is 20 micron thick polyethylene film 3 on the second sheet of wood. Both oak veneers 2 have a wood moisture content of 20%. The grain direction of both oak veneers 2 is the same the veneers are arranged with parallel fiber direction to each other.

These five layers of oak veneer 2 and polyethylene film 3 stick firmly together. These layers of different material in dimensions of 150 mm × 150 mm were pressed without preheating in a press between two flat press plates at 125 ° C and a pressure of 30 N / mm ² for 2 minutes together. Without the addition of binder, a strong bond between the layers has arisen.

During the pressing process, large parts of the water evaporate. The resulting water vapor can not penetrate the layers of polyethylene film. It escapes between the foils, usually over the side edges of the veneer. The water vapor is generated inside the fibers. To escape, he must penetrate the fiber walls of the oak veneer. In this case, the bonds or interfaces between the individual fibers prove to be the weakest section of the veneer. Numerous bonds between the individual fibers break away from each other so that the oak veneer is broken down into individual fibers and fiber bundles (lots or sections). But the fibers retain their position. The image of the oak veneer does not change for the viewer. At the same time, the strong bond between plastic film and veneer arises. The water vapor is created and escapes in a short time, so that the pressing time of 2 minutes proves to be sufficient to connect in addition, the layers of plastic and wood together.

The resulting wood material 1 gives the impression of a wooden surface, because the plastic film is transparent. However, the surface is sealed by the polyethylene film so that it is ready for use. The wood material 1 is perpendicular to the longitudinal direction of the fibers of the oak veneer - compared with an untreated oak veneer flexible. The individual fibers or fiber bundles can be shaped or bent much better than in the composite of the oak veneer in the direction of its longitudinal axis. The degree of Defibration is detected by visual inspection. Level 1 denotes a closed veneer picture. Levels 2, 3 and 4 indicate an increasingly resolved fiber image. Step 5 denotes a dissolved fiber or veneer image. For the degree of defibration, starting from the untreated veneer, the following steps are defined:
Level 1 optically no defibration recognizable
Stage 2 Defibration in transmitted light visible
Level 3 Recognizable spaces
Level 4 Clear intervals
Level 5 fiber composite dissolved

The flexibility is captured by bending by hand. The required bending forces are compared to the untreated veneer. The untreated veneer has a flexibility of level 5 (minimum flexibility). A maximum flexible wood material is assigned to level 1. It is ideal to refer to a wood material that has a Level 1 defibration and Level 1 flexibility. As degrees of flexibility about an axis, which become perpendicular to the fiber direction, starting from the untreated veneer, which is used in the wood material, apply:
Level 1 good bendable
Level 2 slightly bendable
Level 3 significantly improved bendability
Level 4 slightly improved bendability
Stage 5 unchanged bendability

The five-ply wooden material made of polyethylene film and oak veneer described above in the exemplary embodiment has a partially ordered veneer image, but in the marginal areas defibred sections (step 3). The wood material is far more flexible than an untreated oak veneer. The flexibility of the wooden material is assigned to level 2.

The wooden material thus produced 1 is under pressure and temperature to the in 2 represented component 4 , a component formed for the interior of a vehicle. The five-ply material 1 of plastic film and oak veneer is pressed in a two-part mold in a press at 100 ° C and 0.8 N / mm ² in five minutes. The mold is removed from the press and the wood material molded into a component remains in the press until the mold with the component has cooled to room temperature. 2 shows the component 4 after molding and cooling in one half 5 the two-part form. The component is then completely demolded and can be used for the intended use, possibly after further finishing such as grinding, deburring or the like.

Further examples

Further examples of the wood-based material according to the invention are shown in Table 1. In each case, a three-ply wood material with two outer layers made of polyethylene with film thicknesses of between 10 μm and 35 μm was produced. The veneer (beech, ash and walnut) has a thickness of 0.5 mm. Samples were made with a size of 100 mm × 100 mm and, for walnut, 120 mm × 250 mm. The other conditions of manufacture (temperature: 120 ° C and 140 ° C, pressure: 33.3 N / mm ² or 11 N / mm ² , time: 60 seconds or 120 seconds) and the respective assessment of the degree of fiberization and the Flexibility is given in Table 1. The assessment of the wood material is carried out according to the classification given above. Table 1 temperature Time Press printing Degree of defibration flexibility Species rehearse ° C s N / mm ² 120 120 33.3 5 2 beech 100 × 100 120 60 33.3 3 4 beech 100 × 100 120 60 33.3 2 3 beech 100 × 100 120 60 33.3 2 2 beech 100 × 100 120 60 33.3 2 4 beech 100 × 100 120 60 33.3 5 2 beech 100 × 100 120 60 33.3 5 1 beech 100 × 100 120 60 33.3 5 1 beech 100 × 100 130 120 33.3 4 3 beech 100 × 100 120 120 33.3 2 2 beech 100 × 100 130 120 33.3 5 1 beech 100 × 100 120 120 33.3 2 4 beech 100 × 100 120 120 33.3 3 3 beech 100 × 100 120 120 33.3 5 1 beech 100 × 100 130 60 33.3 1 2 beech 100 × 100 130 60 33.3 1 3 ash-tree 100 × 100 130 60 33.3 5 1 ash-tree 100 × 100 130 60 33.3 5 1 beech 100 × 100 130 60 33.3 4 4 beech 100 × 100 130 60 33.3 5 2 ash-tree 100 × 100 120 120 33.3 4 1 beech 100 × 100 130 120 33.3 1 3 ash-tree 100 × 100 130 120 33.3 3 5 beech 100 × 100 130 120 33.3 5 1 ash-tree 100 × 100 130 120 33.3 5 1 ash-tree 100 × 100 140 60 11.1 3 2 walnut 120 × 250

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2008/007360 [0003]
• FR 2868733 [0003]
• DE 4110640 [0003]
• DE 102004007543 [0003]
• WO 96/32257 [0004]
• US 2002/0142145 [0004]
• JP 61-197226 [0004]

Claims (19)

Method for producing a wood-based material with the steps - Setting the moisture content in a veneer made of wood - Building the wood material by arranging at least one veneer between at least two plastic films Vaporizing water from the veneer so that the veneer is at least partially decomposed into fibers. A method according to claim 1, characterized in that a moisture content of the veneer between 5% wood moisture and fiber moisture saturation is set. A method according to claim 1 or 2, characterized in that veneer of a thickness of up to 10 mm is used, preferably of up to 5 mm thickness. Method according to at least one of the preceding claims, characterized in that the evaporation of water at a pressure between 5 N / mm ² and 100 N / mm ² , preferably at a pressure between 20 N / mm ² and 30 N / mm ² . Method according to at least one of the preceding claims, characterized in that the evaporation of water in up to 30 minutes, preferably in up to 10 minutes, particularly preferably takes place in up to 2 minutes. Method according to at least one of the preceding claims, characterized in that a thermoplastic or a thermosetting plastic film is used. Method according to at least one of the preceding claims, characterized in that the plastic film has a thickness of 10 microns to 2000 microns, preferably from 20 microns to 50 microns. Method according to at least one of the preceding claims, characterized in that the plastic film means for absorbing ultraviolet radiation and / or dyes are added. A method according to claim 1, characterized in that for constructing the wood material arranged between two plastic sheets veneer is supplemented by at least one further veneer and at least one further plastic film, wherein plastic films are arranged as outer layers of the wood material. A method according to claim 1, characterized in that plastic films and veneer are arranged in a mold which is shaped to produce a three-dimensional component. Wood material, comprising at least one veneer, which is arranged between two plastic films, characterized in that the veneer is at least partially defibrated. Wood material according to claim 12, characterized in that the wood material comprises at least one further veneer and at least one further plastic film, wherein the wood material plastic film and veneer in alternating layers and plastic film in each case forms the outer layers. Wood material according to claim 12 or 13, characterized in that the at least partially defibered veneer has a thickness of 0.5 mm up to 10 mm, preferably of up to 5 mm. Wood material according to at least one of claims 12 to 14, which is bent perpendicular to the longitudinal direction of the wood fibers of the veneer without breaks or compressions are visible in the veneer, wherein the bending radius of the wood material is at least 10 mm. Method for molding a component from a wood-based material, comprising at least one at least partially defibered veneer, which is arranged between at least two plastic films, with the steps: - Arranging the wood material in a mold - closing the mold - Deformation of the wood material under the influence of pressure and temperature to a component - cooling the component. A method according to claim 16, characterized in that the deformation takes place at a pressure of 0.1 N / mm ² to 1.0 N / mm ² . A method according to claim 16, characterized in that the deformation takes place at a temperature of above 90 ° C. Method according to at least one of claims 16 to 18, characterized in that the deformation includes bending of partial surfaces of the wood material, the radius being 10 mm or more. Component of a wood material, comprising at least one at least partially defibered veneer, which is arranged between two plastic films, characterized in that the component is formed in three dimensions.

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