EP2977524A1 - Wood material panel with reduced noise emission and method for producing the same - Google Patents

Abstract

The invention relates to a Holzwerkstoffpaneel, in particular a floor panel, with a top and a bottom with two longitudinal edges a, a 'and two width edges b, b', wherein on the underside of the wood-based panel at least one survey of plastic is provided with a predetermined height. The invention also relates to a process for its preparation.

Description

The present invention relates to a wood-based panel with reduced acoustic emission according to claim 1 and a method for its production according to claim 12.

Laminate flooring, which can be produced from wood-based panels or floor panels, has been marketed for about 25 years with a focus on Central Europe. The market share of laminate flooring in the total floor market is now more than 10% in individual countries. The focus of the use then as now in the non-commercial area for almost all domestic applications. A particular advantage of laminate flooring is that it can be easily installed using floor panels, without these panels must be glued together.

Although laminate floors are becoming increasingly popular, the product still suffers from certain shortcomings that are repeatedly highlighted by users. The product laminate flooring is predominantly made of wood and is therefore moisture-sensitive or not dimensionally stable in the event of changing air humidity. For this reason, use of laminate flooring e.g. to classify as critical in humid areas.

Furthermore, the surface of laminate flooring is perceived as cold compared to oiled or lacquered woods. There are various approaches to improve the surface properties of laminate flooring and to make the haptics more attractive.

Another frequently mentioned disadvantage of laminate flooring is a significant room sound and impact sound level, which z. B. the use of laminate flooring in apartment buildings is severely limited or even advised against its use.

Laminate floors are mainly laid floating using individual panels, whereby a connection between the individual panels is effected in the laying plane, but with no contact with the underlying ground layer. At a suggestion of the laminate floor, z. B. by committing, audible sound waves are generated. These sound waves are on the one hand audible as Begehschall in the same room in which the excited laminate floor is, or are audible as impact sound in underlying rooms. The buyer of the product perceives the room / walking noise as particularly negative.

To reduce the noise level z. B. between the floor panels and the floor sound-absorbing or sound-absorbing layers, such. As wood fiber insulation panels, rubber mats, Gummikorkgranulatmatten, polyethylene foam sheets and the like provided. Another measure for reducing impact and room sound is the sticking of mineral-filled insulating mats (heavy foils) on the back of the floor panels. However, these measures are complex and only lead to minor improvements in the acoustic behavior of the laminate floor, especially the impact sound affect. Incidentally, such films are expensive and cause a significant increase in product weight, which has not contributed to the acceptance of this system in the market to date.

Another approach is based on the Parket in a full-surface bonding of the laminate floor with the underlying soil such. B. a screed floor. In contrast to the Parket, a repair of laminate flooring by sanding the wear layer and re-sealing is not possible. This leads to significantly shorter service lives, combined with a considerable effort in removing the old laminate floor in the event of a refurbishment. In addition, a laminate floor as mentioned above, undergoes a significant change in dimension when changing the relative humidity, which leads to the buildup of tension. These stresses can cause peeling or lifting of the laminate floor from the screed. From these For reasons of non-adhesive bonding of the laminate floor to the corresponding floor surface, it is currently not recommended.

To avoid a complete gluing or gluing of the laminate floor is in the DE 100 34 407 C1 a partial gluing described. In this case, an insulating layer is fixed by means of Streifenverleimung on the underside of a panel, wherein the glue strips are transverse and are so thick that gaps between the insulation layer and the panel are formed.

Another approach of partial gluing will be in the DE 10 2011 001 102 A1 tracked. Here, adhesive cords or strips of synthetic rubber are applied in parallel at regular intervals on the backs of the laminate floor panels. These adhesive strips are applied to the laying surface before laying the floor panels. After installation, the adhesive strips of synthetic rubber act as viscoelastic adhesive strips, which can be removed together with the plank in an acceptable manner from the floor. These adhesive strips cause a frictional coupling of the floor panels on the underlying floor, such. B. cement or screed floor. As a result, a reduction of footstep and room sound is achieved. However, the individual floor panels must be provided with a siliconized paper before use, which must be disposed of later. Also, the order quantities of the synthetic rubber on the back of the floor panels are at least 250 g / m ² , whereby the product is considerably more expensive. In addition to the high cost of this approach is technically complex, since the laying of the floor panels is difficult, and an additional disposal problem arises.

It was therefore an object of the present invention to find a technical solution that causes a significant reduction in the impact and room sound emission and at the same time is much cheaper and more ecological than the approaches pursued so far. Moreover, it is desirable to integrate a corresponding manufacturing process in a conventional laminate flooring production. In addition, it should be avoided by the application of thick layers to increase the overall strength of the product. It is also an object of the present invention to cause no additional disposal problems and to facilitate the installation of the soil as simple and without time.

This object is achieved by providing a wood-based panel having the features of claim 1 and a corresponding manufacturing method for this wood-based panel.

Accordingly, a Holzwerkstoffpaneel, in particular a floor panel, with a top and a bottom with two longitudinal edges a, a 'and two width edges b, b' is provided. The panel which is preferably used has a rectangular area according to A = a * b, where a represents the panel side length and b the panel width and where a ≥ b.

The panel side length a is, for example, in the range of 500 to 2,000 mm, preferably in the range of 600 to 1400 mm, particularly preferably in the range of 1,200 to 1,400 mm.

The panel width b is, for example, in the range of 100 mm to 500 mm, preferably in the range of 150 to 400 mm, particularly preferably in the range of 150 to 200 mm.

Typical panels used have, for example, a panel side length a x a panel width b of 600 × 400 mm, 1,380 × 193 mm, 1,380 × 157 mm, 1,845 × 188 mm or 1,383 × 116 mm.

According to the invention, at least one elevation of plastic with a predetermined height h is provided on the underside of such a wood-based panel.

The height h of the at least one plastic recovery is preferably such that after the curing or cooling of the plastic in the installed state of the wood-based panel or floor panel between the panel bottom or - back and the bottom, z. As cement floor or screed floor, a distance or a height of 1 to 10 mm, preferably 1 to 3 mm is formed.
The Kunststofsehebungen may have various shapes, in particular those that may arise during application of the adhesive in the direction of transport moving panels, such as ovals or stripes.

Preferably, the Kunststofsehebungen are circular, for example, obtainable by applying the plastic to the bottom or back of a static panel.

The wood-based panels according to the invention are surprisingly characterized by an improved acoustic behavior. In particular, footsteps and walking noise of the present wood-based panels in comparison to conventionally used wood-based panels, z. As laminate floors, characterized by a reduced acoustic emission, as evidenced by the below-mentioned measurement data for determining the Begehschalles. After hardening / cooling of the plastic applied to the underside of the panel, a distance or a joint with a thickness depending on the height of the plastic reinforcement arises between the underside of the panel and the floor on which the panels are laid. Typically, the distance between the panel bottom and the bottom is 1 to 10 mm, preferably 1 to 3 mm. It is believed that due to the induced by the plastic lifting coupling of the floor panel to the floor to an increase in the oscillating mass, so it comes when walking on laminate flooring made of the existing floor panel over conventional laminate floors to a reduced sound radiation. It has also been found that the greater the distance and thus the air gap between the floor panel or laminate floor and the floor, the more improved the sound reduction can be.

In one embodiment of the present panel, the height h of the at least one plastic reinforcement with respect to the underside of the panel is 1 to 10 mm, preferably 2 to 7 mm, particularly preferably 3 to 5 mm. The height of the plastic recovery determines the distance between floor panel and floor and thus influences the sound reduction, as stated above.

In a further embodiment, the at least one plastic increase is circular and has a diameter d of 10 to 100 mm, preferably 20 to 80 mm, particularly preferably 40 to 60 mm.

It is furthermore preferred if a multiplicity of synthetic material elevations are arranged on the underside of the panel in symmetrical form.

Thus, the number of Kunststofsehebungen depending on the size or dimension of the wood-based panel used between 2 to 20, preferably 5 to 15. In addition to the size of the floor panel, the number of synthetic material elevations is also influenced by the type of plastic used and the type of floor on which the floor panel is laid.

It is particularly preferred if the plastic material elevations are arranged on the underside of the panel in the form of parallel double rows.

In a variant of the present wood-based panel, a plurality of synthetic material elevations, but at least two synthetic material elevations, are arranged in a row parallel to the longitudinal edges a, a 'and parallel to the width edges b, b' of the panel at a distance of 10 to 50 mm, preferably 20 to 40 mm, particularly preferably 30 mm from the respective longitudinal and / or width edge. In other words, the one or more rows of plastic heats have a predetermined distance from the longitudinal edges of the panel as well as the widthwise edges of the panel. In this case, the one or two rows of plastic hoops are preferably provided close to the edges, wherein the center of a panel may be free of plastic hoops, or as further explained below in detail, another series of plastic hoops may be provided. However, the distances mentioned (as well as the distance values given below) vary depending on the total area of the panel and must be adapted to the respective total area.

In one embodiment of the present panel, the distance between in each case at least two synthetic material elevations in a row along the respective longitudinal edges a, a 'is between 100 and 500 mm, preferably 200 and 400 mm, particularly preferably 300 mm. On the other hand, the distance between at least two synthetic material elevations in a row from each other is between 50 and 150 mm, preferably 70 and 130 mm, particularly preferably 100 mm, along the respective width edge b, b '. Accordingly, the distance between the synthetic material elevations in a row along the longitudinal edge is greater than along a width edge. These different distances are primarily due to the typically rectangular shape of a floor panel. So typical floor panels have a length a, which is many times greater than the width b.

As already mentioned, it is provided in a further variant of the panel that an additional single row of synthetic material elevations runs parallel to the longitudinal and width edges on the underside of the panel, in particular along the center of a panel, wherein the synthetic material elevations of the additional single row offset from the Synthetic material elevations of the double rows, which preferably extend close to the longitudinal and width edges of the panel, are arranged.

Due to the above-mentioned central arrangement of this additional single row of synthetic material elevations, these also have a greater distance from the respective longitudinal edges and width edges. Thus, the distance of the additional central single row to a longitudinal edge a, a 'be 100 mm and to the respective width edges b, b' be 150 mm. The distance between the Kunststofsehebungen in the additional single row, however, does not differ from the distance of the Kunststofsehebungen in the double rows and is z. B. along the longitudinal edges a, a '300 mm. The symmetrically offset arrangement of the Kunststofsehebungen in such an additional single row favors a uniform support and connection of the floor panel with the ground, z. As a screed or cement floor, and thus promotes further noise reduction.

In a further preferred embodiment of the present wood-based panel, the at least one plastic reinforcement is provided in at least one depression in the panel underside. This is a depression, z. B. a bore or a groove available through milling, introduced into the panel bottom and filled with the at least one plastic, wherein the amount of the registered plastic is dimensioned so that the plastic protrudes from the recess with a predetermined height of the panel bottom or protrudes ,

Preferably, the plastic protrudes from the recess with a height h of 1 to 10 mm, preferably 2 to 7 mm, particularly preferably 3 to 5 mm, and thus corresponds to the height of the plastic recovery.

The shape of the Kunststofsehebungen will be dictated by the nature of the wells that are introduced in the production run in the Paneelunterseite or back, such as by producible by milling depressions such as slots or tub-shaped rectangles, the trough shape by immersion in the panel and extending a router from the panel is formed when the panel moves in the usual way in the transport direction.

Preferably, the Kunststofsehebungen are circular, for example, predetermined by introducing circular holes in the Paneelunterseite or back.

It is provided that the at least one recess in the form of bores with a diameter d of 10 to 100 mm, preferably 20 to 80 mm, particularly preferably 40 to 60 mm and with a depth h1 of up to 50% of the thickness of the panel, z. B. with a depth h1 of 1 to 10 mm, preferably 2 to 8 mm, particularly preferably 4 to 6 mm, is present. The arrangement of the plastic in such wells improves the sound insulation over that of a plastic recovery without depression.

The arrangement of the recesses provided corresponds to the above-described number and arrangements of the Kunststofsehebungen. Accordingly, the wells z. B. circular holes or produced by milling trough-shaped depressions inserted in double rows on the underside of the panel and then filled with the predetermined amount of plastic, which is sufficient to effect a plastic recovery with the desired height. As also described for the Kunststofsehebungen, the wells in several rows, z. B. double rows, which is to pay attention to an offset symmetrical arrangement of the adjacent rows of wells.

It is also advantageous if a plastic or an adhesive with a permanent tackiness is used as the plastic. Here, the term "stickiness" or the "Tacks" is the property of an adhesive, for. As a pressure sensitive adhesive that causes immediate adhesion to almost all materials.

Adhesives may generally have a permanent tack or a temporary tack. In this case, have adhesives by a chemical reaction Curing, typically no permanent stickiness on because the adhesive layers are in a solid state. By contrast, permanent tack adhesives typically have a liquid or highly viscous state and have less cohesive strength than the chemically cured adhesives.

A typical property of permanent tack adhesives is their creep at creep load, i. If a constant pressure is applied to an adhesive with permanent tack, limited spread of the adhesive may occur. A permanent stickiness requires a relatively large mobility of the macromolecules, so that crystalline or strongly crosslinked polymers just do not cause permanent stickiness.

In the present case, it is preferable to use as plastic a pressure-sensitive hot melt adhesive based on synthetic rubber, acrylates and / or polyolefins.

Preferably, pressure-sensitive hot-melt adhesives are used which have suitable tackiness, for example sufficient peel strength. The peel strength of the pressure-sensitive hotmelt adhesives used is preferably greater than 1 N (Newton), 2 N or 3 N, particularly preferably greater than 4 N, 5 N or 6 N, most preferably greater than 7 N, 8 N, 9 or 10 N.

The peel strength can be measured by the so-called peel test. For this test strips of mostly 25 mm wide and 100 mm long are glued to a standard test plate made of metal or glass. These strips are peeled off at a peel angle of 180 ° and the force required for detachment determined in Newton. Suitable testing devices are, for example, the Zugmessgeräte the company Zwick, Ulm, Germany.

• Auftragen einer vorbestimmten Menge an Kunststoff auf die Unterseite des Holzwerkstoffpaneels an vorbestimmten Auftragspunkten, insbesondere in Form einer Doppelreihe an Auftragspunkten; und
• Anpressen des aufgetragenen Kunststoffes, insbesondere unter Verwendung einer Walze und eines Abstandhalters unter Ausbildung der Kunststofferhebungen.

The present wood-based panel is produced in a process by the following steps:

• Applying a predetermined amount of plastic to the underside of the wood material panel at predetermined application points, in particular in the form of a double row of application points; and
• Pressing the applied plastic, in particular using a roller and a spacer to form the Kunststofsehebungen.

Accordingly, the present panel is made such that initially the plastic z. B. a pressure sensitive hot melt adhesive is selectively applied to the back of the panel and the line-shaped, plate-shaped or circular Kunststauehebungen be generated by pressing.

The amount of adhesive used per intended plastic lift will vary with the desired height and diameter of the circular plastic lift and the adhesive used. Thus, the amount of adhesive can be between 1 and 5 g, preferably between 2 and 4 g, particularly preferably 3 g. Overall, the required amount of adhesive (about 100 g / m ² ) compared to the in DE 10 2011 001 102 A1 mentioned variant (about 250 g / m ² ) are significantly reduced,

In a further variant of the present method, at least one or more depressions are first introduced onto the underside of the panel and a corresponding amount of plastic is filled into these depressions accordingly.

For this purpose, in a variant of the method in the back of the panels before, during or after the profile generation on the panels bores introduced, which then with the plastic, z. B. a viscoplastic curing plastic filled. The holes have a diameter of 10 to 100 mm, preferably 20 to 80 mm, more preferably from 40 to 60 mm and a depth of up to 50% of the thickness of the floor panel used.

The bore is filled with the plastic in such a way that forms a spherical structure of the plastic above the back of the floor panel. The height of this crowned structure should give rise to a distance between the floor panel and the bottom of at least 1 mm, preferably up to 10 mm after curing of the plastic.

The coupling to the floor can by the order of z. B. a pressure-sensitive hot melt adhesive such. B. on the basis of a synthetic rubber or polyolefin in the upper region of the spherical geometry of the plasticizer. In a particular embodiment of the present process, this pressure-sensitive hot-melt adhesive may be used in an amount of from 0.1 to 1 g / m ² , preferably from 0.5 to 0.7 g / m ² , depending on the size of the surface of the spherical geometry, for example. B. be applied using a nozzle. After applying the plastic of the hotmelt adhesive, a release paper is placed on the underside of the panel, so that bonding between the planks are avoided.

Another approach is to introduce the hotmelt adhesive directly into the bore, so that a defined amount of pressure-sensitive hotmelt adhesive protrudes beyond the bore and is then pressed together with the aid of a pressing device to a defined height. The area of the panel provided with such depressions is preferably from 1 to 10%, in particular from 3 to 7%, based on the total area of the underside of the panel.

As already described in detail above, the recesses or holes along the longitudinal edges of the panels are mounted in a double row. These double rows of wells or holes are z. B. milled at a distance of 20 to 40 mm from the respective edge in the Paneelunterseite. The distance of the recesses or holes in a row is approximately 100 mm. In addition to the arrangement of the holes in double rows, it is also possible to realize other patterns. Thus, a double row can be provided in each case in the edge region of the panel and a single row in the center of the panel between the double rows.

Fig. 1

eine Draufsicht auf die Unterseite eines Fußbodenpaneels gemäß einer ersten Ausführungsform,

Fig. 2

eine Querschnittsansicht der Ausführungsform der Figur 1,

Fig. 3

ein Schalldiagramm einer ersten Ausführungsform des vorliegenden Holzwerkstoffpaneels, und

Fig. 4

ein weiteres Schalldiagramm einer zweiten Ausführungsform eines Holzwerkstoffpaneels.

The present invention will be described in more detail with reference to the following embodiments with reference to the figures. Show it:

Fig. 1

a plan view of the underside of a floor panel according to a first embodiment,

Fig. 2

a cross-sectional view of the embodiment of the FIG. 1 .

Fig. 3

a sound diagram of a first embodiment of the present wood-based panel, and

Fig. 4

a further sound diagram of a second embodiment of a wood-based panel.

FIG. 1 shows the bottom of a wood-based panel 1, which can be used as a floor panel in a laminate floor used. The rectangular panel 1 has longitudinal edges a, a 'and widths b, b'. On the underside of the panel 1, a plurality of circular Kunststaishebungen 2 a, 2 b, 2 c are provided, which are each arranged in a row.

The synthetic material elevations 2a, 2c each extend in a double row parallel to and along the longitudinal and latitudinal edges. The respective distance to the longitudinal and width edges of the double-row synthetic material elevations 2a, 2c is relatively small on the total area of the panel. Thus, the distance between the respective outer synthetic material elevations 2 a, 2 c from the longitudinal and width edges can be 30 mm.

The series of synthetic material elevations 2b runs centrally on the underside of the panel, wherein the plastic elevations 2b are each arranged offset relative to the plastic elevations 2a, 2c.

FIG. 2 shows a cross section through the panel of FIG. 1 , wherein it is clearly recognizable that the synthetic material elevations 2a, 2b, 2c are produced by the introduction of plastic into depressions or bores made on the underside of the panel. The Kunststofsehebungen have a spherical structure with a predetermined height, which is determined by the introduced into the wells amount of plastic.

Embodiment 1

A profiled laminated floor board (8 mm) is provided in the pass with a double row holes, the diameter of 40 mm, a depth of 4 mm and at a distance of 30 mm from the longitudinal edge at a distance of 100 mm from each other are attached. In the holes, a heated plastic based on a pressure sensitive hotmelt adhesive (SK 249.10, Jowat, Detmold, Germany) using an applicator with nozzle filled (about 3g / bore).

The amount of plastic is dimensioned so that the material protrudes spherical over the back of the laminate floor. With the aid of a roller and a spacer, the pressure-sensitive hotmelt adhesive which projects beyond the back of the laminate floorboard is pressed onto the rear side of the laminate floorboard at a defined height. In the specific case it was 2.4 mm. Thereafter, a siliconized paper is placed on the adhesive melt adhesive to cover. The planks are then packed.

In order to test the effectiveness with regard to sound reduction, a comparative test is carried out on a sample (size: 30 x 20 cm) using a pulse hammer. The measurement is done after the DE 10 2008 053 757 A1 carried out. As a reference, an 8 mm laminate floor with a Noppaschaum (2 mm) was tested as a base with. A duplicate determination was made on the test product.

The sound spectrum of the two laminate floors is in FIG. 3 and shows a significantly reduced noise emission, in particular in the range of 200-2000 hertz. The A-weighted sound pressure level is reduced by 11 dB in the test product.

Embodiment 2:

Defined quantities of an adhesive hot-melt adhesive (SK 249.10, Jowat, Detmold, Germany) were applied to a profiled laminate floor board (8 mm) at defined points. A double series of application points was created, spaced at a distance of 30 mm from the longitudinal edge at a distance of 100 mm from each other.

The amount of plastic is dimensioned so that the material shows plate-shaped areas after passing through a roller and a spacer on the back of the laminate plank. These have in the present example a diameter of 4 cm and a height of 2.4 mm. The order quantity for the production of this plate-shaped Survey was about 2.7 g. Thereafter, a siliconized paper is placed on the adhesive melt adhesive to cover. The planks are then packed.

In order to test the effectiveness with regard to sound reduction, a comparative test is carried out on a sample (size: 30 x 20 cm) using a pulse hammer. The measurement is done after the DE 10 2008 053 757 A1 carried out. A triplicate determination was made on the test product. As a reference, an 8 mm laminate floor with a Noppaschaum (2 mm) was tested as a base with.

The sound spectrum of the two laminate floors is in FIG. 4 shown and indicates a significantly reduced acoustic emission, especially in the range of 200 -1000 hertz. The A-weighted sound pressure level is reduced by 5 dB in the test product.

Claims (15)

Wood material panel, in particular a floor panel, having a top side and a bottom side with two longitudinal edges a, a 'and two width edges b, b'
characterized in that
on the underside of the wood-based panel at least one elevation of plastic is provided with a predetermined height h. Holzwerkstoffpaneel according to claim 1, characterized in that the height h of the at least one plastic reinforcement with respect to the panel underside 1 to 10 mm, preferably 2 to 7 mm, particularly preferably 3 to 5 mm. Holzwerkstoffpaneel according to claim 1 or 2, characterized in that the at least one plastic increases a diameter d of 10 to 100 mm, preferably 20 to 80 mm, particularly preferably 40 to 60 mm. Holzwerkstoffpaneel according to any one of the preceding claims, characterized in that a plurality of Kunststofsehebungen on the underside of the panel are arranged symmetrically, in particular in the form of double rows. Holzwerkstoffpaneel according to any one of the preceding claims, characterized in that the Kunststofsehebungen in a row parallel to the longitudinal edges a, a 'and parallel to the width edges b, b' of the panel with a distance of 10 to 50 mm, preferably from 20 to 40 mm , in particular preferably of 30 mm from the respective longitudinal and / or width edge are arranged. Holzwerkstoffpaneel according to any one of the preceding claims, characterized in that the distance between at least two Kunststofferhebungen in a row along the respective longitudinal edges a, a 'between 100 and 500 mm, preferably 200 and 400 mm, particularly preferably 300 mm. Holzwerkstoffpaneel according to any one of the preceding claims, characterized in that the distance between at least two Kunststofferhebungen in a row from each other along the respective width edge b, b 'between 50 and 150 mm, preferably 70 and 130 mm, particularly preferably 100 mm. Holzwerkstoffpaneel according to any one of the preceding claims, characterized in that an additional single row of Kunststofsehebungen is provided parallel to the longitudinal and width edges, wherein the plastic material elevations of the additional single row are offset from the plastic material elevations of the double rows. Holzwerkstoffpaneel according to any one of the preceding claims, characterized in that the at least one plastic reinforcement is provided in at least one recess in the Paneelunterseite, wherein the at least one recess is filled with at least one plastic, so that the plastic from the recess with a predetermined height of the Panel underside protruding or protruding. Holzwerkstoffpaneel according to claim 9, characterized in that the plastic protrudes from the recess with a height h of 1 to 10 mm, preferably 2 to 7 mm, particularly preferably 3 to 5 mm. Holzwerkstoffpaneel according to claim 9 or 10, characterized in that the at least one recess in the form of holes with a diameter d of 10 to 100 mm, preferably 20 to 80 mm, insbesondre preferably 40 to 60 mm, and with a depth h1 of up to 50% of the thickness of the panel, for example from 1 to 10 mm, preferably 2 to 8 mm, particularly preferably 4 to 6 mm is present. Holzwerkstoffpaneel according to any one of the preceding claims, characterized in that a plastic with a permanent tackiness is used as the plastic. Holzwerkstoffpaneel according to any one of the preceding claims, characterized in that a pressure-sensitive hot melt adhesive based on synthetic rubber, acrylates and / or polyolefins is used as the plastic. Process for producing a wood-based panel according to one of the preceding claims, comprising the following steps: - Applying a predetermined amount of plastic on the underside of the wood-based panel at predetermined order points, in particular in the form of a double row of application points; and - Pressing the applied plastic, in particular using a roller and a spacer to form the Kunststofsehebungen. A method according to claim 14, characterized in that a predetermined amount of plastic is introduced into at least one introduced on the underside of the panel recess.

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