DE202017000815U1 - Wood panel - Google Patents

Abstract

Wood-based panel with a flat, a large-scale top (1) and a corresponding bottom (2) and these connecting edges (3) comprising body (4) made of a wood material, in particular of a compressed with an adhesive wood material chip material or fiber material, wherein the Wood material of the body (4) is executed by default without special water-repellent finish, characterized by, on the top (1) of the body (4) adherently applied cover layer (5) made of a water-repellent treated wood material.

Description

The invention relates to a wood-based panel having the features of the preamble of claim 1 and a worktop, in particular a kitchen countertop, having the features of the preamble of claim 5 or the features of the preamble of claim 8.

Wood-based panels of the type in question are comprehensively known. It is used as a carrier or precursor for composite elements for interior work, worktops, especially kitchen countertops, window sills, but also floor panels, wall cladding panels, etc. Typically, a wood-based panel of the type in question has a flat body made of a wood material, a large area Has top and an opposite, correspondingly large underside, which are peripherally connected by edges. The body typically consists of a wood-material chip material or fiber material compressed with a binder, the wood-based material and the binder being made without special water-repellent finish.

For a chipboard as a corpus applies the DIN EN 312, for MDF (medium-density fiberboard) and HDF (high-density fiberboard) applies to DIN EN 622. The cohesion of wood fibers in the body is by the same time pressed together with the wood fibers binder, In particular, a thermosetting binder (eg., Formaldehyde-urea resin) achieved ( DE 10 2010 003 437 A1 ).

A worktop using a wood-based panel of the type in question typically has as a body a wood-based panel, which is provided on the top with a decorative laminate (HPL = high pressure laminate) as a surface layer. On the underside of the body is provided with a return usually a resin-impregnated kraft paper as protection against the influence of steam and water as well as compensation for deformation of the worktop as a whole. Typically, for a 38mm thick wood board panel, the surface layer of a high pressure laminate panel will have a thickness of 0.6mm to 0.8mm, and the backing kraft will have a thickness of 0.1mm to 0.2mm. The total thickness of such a worktop is therefore about 39 mm.

For certain applications one would like to have waterproof plates. In this case, one will preferably realize a high compression of the chips or fibers in the body and also work with a high proportion of a water-repellent equipped adhesive. The corresponding wood-based panel is thereby difficult, moreover, it is expensive to manufacture.

Alternatively, one can also realize high-pressure laminate panels of greater thickness, which are pressed in multiple layers of kraft paper with impregnating resins and are used in themselves only for surface coating. Also, such larger thickness panels of high pressure laminate material are heavy and expensive.

Wood-based panels that are water-repellent are particularly interesting as a basis for kitchen worktops, where, for example, according to the latest requirements, a built-in sink should be installed flush with the surface. The state of the art, from which the present invention proceeds, is known from practice. It is a kitchen worktop, in which the body of the wood-based panel is designed as lightweight chipboard (specific gravity at about 500 kg / m ³ ). This is a three-ply chipboard with a lower density middle layer and surface-ground cover layers on top and bottom. On the top side glued on the body is a waterproof surface layer of a high-pressure laminate plate. Glued on the underside is a counter-pull, here also from a high-pressure laminate, which is much thinner than the surface layer. The edges connecting the top and the top of the wood-based panel are protected by a plastic edge strip.

With a total thickness of the worktop of 38 mm, the chipboard body has a thickness of only about 35 mm, while the surface layer of a high-pressure laminate (HPL) has a thickness of about 2.4 mm and the backing of a high pressure -Hichstoffplatte (HPL) has a thickness of about 0.6 mm. In this worktop so the water-repellent high-pressure laminate plate, which forms the surface layer, about three times as thick as a normal worktop.

Despite the greater thickness of the surface layer you have to work very precisely when flush mounting a sink in a worktop of the type in question and make a perfect waterproof gluing at the edge of the sink, so no moisture between the edge of the sink and the edge of the high-pressure laminate , penetrates. Incoming moisture would otherwise lead to swelling of the light chipboard.

In practice, it has been found that difficulties arise with worktops of the type described above. For this reason, it has already been proposed, in the cutout of the worktop additionally waterproof plastic wall part einuleimen, which in turn forms the receptacle for the edge of the sink or other built-in part ( DE 10 2006 056 786 A1 ). It is obvious that such a manufacturing process is very expensive, especially since the plastic wall part only on site, so when installing, for example, the sink, in turn can be installed.

The teaching is based on the problem to provide a wood-based panel and a worktop, which avoids the aforementioned difficulties, without having to resort to an additional plastic wall part.

The aforementioned problem is solved according to the invention by a wood-based panel, which is characterized by a cover layer of a water-repellent treated wood material, which is firmly adhered to the top of the body. Completed to a countertop is then the waterproof surface layer, which is also provided in the prior art, not on the top of the body, but in turn on top of the aforementioned cover layer. Thus, a water-repellent finished or waterproof total layer thickness is achieved on the body top side, which is substantially larger than in the prior art, from which the invention proceeds, in particular at least twice, usually more three to four times that of the the practice known prior art existing layer thickness.

The probability that at such a large layer thickness of water-repellent or waterproof material equipped moisture reaches the body of non-water repellent treated wood material is very low in view of the long, filled with waterproof adhesive and / or sealant joint. As a result, the effect of a completely water-repellent finished wood-based panel is achieved as a result of the installation situation, nevertheless, the body still consists of inexpensive standard wood-based material without special water-repellent finish. This is inexpensive and has a much lower total weight of the wood-based panel in comparison with a completely water-repellent equipped plate, be it from wood-based material, be it from high-pressure laminate, the result.

As a result, one has all the advantages with regard to the flush mounting of sinks, etc., without the disadvantages - high costs and high weight.

The adherent connection of the cover layer with the top of the body is preferably carried out by gluing with a glue which is customary for this purpose, for example a urea-based glue etc. To that extent reference may be made to the general state of the art known for the gluing of wood-based materials.

The inventively larger layer thickness of the applied on the top of the body cover layer makes it possible, for example, a built-in hob with a thickness of 7 mm to 10 mm flush mounted completely in the top layer. The underlying body has even in the area of the support of the built-in hob nor a protection by a thin layer of the material of the cover layer. This results in a perfect protection of the non-water repellent equipped body.

According to a particularly preferred teaching, the body itself is in the wood-based panel according to the invention with a top layer of a water-repellent treated wood material as chipboard, especially as light chipboard executed. Alternatives are insofar z. As plywood, MDF material, HDF material, depending on the desired application, with a normal binder such. B. formaldehyde-urea resin. Basically, a lightweight board such as a honeycomb panel can be used as a body.

As far as the cover layer is concerned, according to the invention, a water-repellent treated MDF layer is recommended. Due to the higher density compared to a light chip board, an MDF layer is inherently more resistant to moisture. You can with a water-repellent binder, z. As a melamine resin or a PMDI material and is then practically waterproof. Alternative for a water-repellent finish of the MDF layer is also the use of a phenolic-reinforced urea resin. Also known methods for the use of acetylated or thermally treated wood fibers (thermowood) come alternatively or cumulatively in question. Typically, admixtures of waxes or paraffins are also often used to improve function. The costs of a MDF layer as a cover layer are hardly higher even with water-repellent equipment than with a non-water-repellent treated MDF layer. In any case, they are much lower than the cost of a thicker high-pressure laminate plate.

According to the invention, it is recommended that the thickness of the cover layer is 10% to 30% of the thickness of the body. With a standard thickness of the wood-based panel of about 37 mm, as it is particularly often found in interior design, you have z. B. a thickness of the body between 25 mm and 32 mm and a thickness of the cover layer between 3 mm and 12 mm. The vast majority of the wood-based panel therefore still consists of the cost-effective standard wood-based material. There, where one Water-repellent equipped wood material is really necessary, namely near the surface, this is inventively available.

As far as a worktop according to the invention is concerned, this is a glued, waterproof surface layer made of a high-pressure laminate (HPL) in this on the top of the already mentioned cover layer of the wood-based panel according to the invention. Alternatively, a direct coating can be used as a surface layer. In a direct coating, the application of the surface layer of resin-impregnated decor paper is applied directly to the top of the wood-based panel.

However, particularly preferred is the embodiment of the worktop according to the invention, in particular in the form of a kitchen worktop, with a surface layer of a high-pressure laminate (HPL), which has been manufactured separately and then glued in a further processing step on the wood-based panel.

Also for the worktop according to the invention, in particular kitchen worktop, it is true that a corresponding counter-pull, which matches the surface layer, should be used on the underside, so that the worktop does not deform. This corresponds to the usual procedure in the prior art.

Assuming a total thickness of the worktop of about 38 mm, so it is recommended according to preferred teaching of the invention that the body has a thickness of 25 mm to 32 mm, the top layer has a thickness of 3 mm to 12 mm, the surface layer a Thickness of 0.5 mm to 3 mm, preferably from 0.7 mm to 1.5 mm, and the backing, if present, preferably a thickness of about 0.4 mm at HPL or of about 0.1 mm having Kraft paper.

If one is dealing with a direct-coated wood-based panel, it is accordingly the case that with a total thickness of the worktop of about 38 mm, the body has a thickness of 25 mm to 34 mm, the cover layer has a thickness of 3 mm to 12 mm and the surface layer a thickness of 0.1 mm to 1.2 mm, preferably from 0.1 mm to 0.8 mm.

In the following, the invention will be explained briefly with reference to an embodiment. In the single figure, a worktop constructed according to the invention can be seen in partial section.

The worktop shown in the single figure initially has a wood-based panel with a flat, a large-scale top 1 and a corresponding bottom 2 as well as these connecting edges 3 having body 4 made of wood-based material. In particular, there is the body 4 from a pressed with an adhesive wood material chip material or fiber material, so it is designed as chipboard, but possibly also as MDF board or HDF board, possibly also as a plywood board.

According to the invention is on the top 1 a tightly applied topcoat there 5 made of a water-repellent treated wood material. While the wood material of the carcass 4 is designed as standard without special water-repellent finish, the top layer is 5 Although also made of a wood-based material, but water-repellent equipped. The body 4 is in the illustrated embodiment, as indicated, designed as light chipboard, while the cover layer 5 designed as a water-repellent treated MDF layer. On the edge are the edges 3 of the body 4 and of course the top layer 5 with a plastic edge strip 3. ' protected.

On the top of the topcoat 5 there is a waterproof surface layer 6 , which consists in the illustrated and preferred embodiment of a high-pressure laminate plate (HPL). In the illustrated and preferred embodiment, there are on the underside of the body 4 a return 7 which consists in the illustrated and so far preferred embodiment of a Gegenzugpapier.

As far as the dimensions are concerned, it is true that with a total thickness of the worktop of about 38 mm, the body 4 a thickness of 25 mm to 32 mm, the top layer 5 a thickness of 3 mm to 12 mm, the surface layer 6 a thickness of 2 mm to 3 mm and the counter-pull 7 , if present, has a thickness of 0.5 mm to 3 mm, preferably 0.7 mm to 1.5 mm.

The concrete embodiment shown has a thickness of the light chipboard, the body 4 forms, from 27 mm, a thickness of the cover layer 5 of 10 mm, a thickness of the surface layer 6 HPL of 1.0 mm and a thickness of the counter 7 mm of 0.1 mm. Overall, this results in about 38 mm, which are desired as the total thickness of the worktop in this embodiment.

At z. B. a nominal thickness of the wood-based panel of about 28 mm resulting in adapted thickness of the body 4 and topcoat 5 , z. B. 15 mm to 22 mm for the body 4 and 3 mm to 12 mm for the cover layer 5 ,

How to get in 1 recognizes left, is the thickness of the edge adjustment of the Worktop grown on a sink with waterproof or water-repellent equipped material grown to 11 mm, is thus more than four times the height, which in the prior art alone with the surface layer 6 made of high-pressure laminate material (HPL). The problem area of the joint at the edge of a built-in sink, which is installed flush, has thus been defused sustainably, without the weight of the countertop is inappropriately high or exceed the cost of the desired frame.

LIST OF REFERENCE NUMBERS

1

top

2

bottom

3

edge

3 '

edgebandings

4

corpus

5

topcoat

6

surface layer

7

return

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

• DE 102010003437 A1 [0003]
• DE 102006056786 A1 [0010]

Claims (10)

Wood-based panel with a flat, a large-scale top (1) and a corresponding bottom (2) and these connecting edges (3) comprising body (4) made of a wood material, in particular from a compressed with an adhesive wood material chip material or fiber material, wherein the Wood material of the body (4) is executed by default without special water-repellent finish, characterized by , on the top (1) of the body (4) adherently applied cover layer (5) made of a water-repellent treated wood material. Wood-based panel after Claim 1 , characterized in that the body (4) is designed as chipboard, in particular as light chipboard. Wood-based panel after Claim 1 or 2 , characterized in that the cover layer (5) is designed as a water-repellent treated MDF layer, preferably pressed with melamine-reinforced urea resin. Wood based on one of the Claims 1 to 3 , characterized in that the thickness of the cover layer (5) is 10% to 30% of the thickness of the body (4). Worktop, in particular kitchen worktop, with a wood-based panel according to one of Claims 1 to 4 with body (4) and cover layer (5) and with a waterproof surface layer (6), which has been glued on top of the cover layer (5), made of a high-pressure laminate (HPL) plate. Worktop after Claim 5 , characterized in that on the underside of the body (4) of the wood-based panel a counter-pull (7), preferably from a kraft paper, is glued. Worktop after Claim 5 or 6 , characterized in that at a total thickness of the worktop of about 38 mm, the body (4) has a thickness of 25 mm to 32 mm, the cover layer (5) has a thickness of 3 mm to 12 mm and the surface layer (6) has a thickness from 0.5 mm to 3 mm, preferably from 0.7 mm to 1.5 mm. Worktop, in particular kitchen worktop, with a wood-based panel according to one of Claims 1 to 4 with body (4) and covering layer (5) and with a waterproof surface layer (6) applied by direct coating on the upper side of the covering layer (5) made of decorative paper impregnated with a suitable binder, such as melamine resin and / or urea resin. Worktop after Claim 8 , characterized in that on the underside of the body (4) of the wood-based panel a counter-pull (7) is applied from a impregnated kraft paper. Worktop after Claim 8 or 9 , characterized in that at a total thickness of the worktop of about 38 mm, the body (4) has a thickness of 25 mm to 34 mm, the cover layer (5) has a thickness of 3 mm to 12 mm, the surface layer (6) has a thickness from 0.1 mm to 1.2 mm, preferably from 0.1 mm to 0.8 mm.

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