EP2857221B1 - Panel with super-matt surface - Google Patents

Description

The invention relates to a method for producing a panel, in particular for a floor covering, as well as such a panel.

From the prior art panels are known which are used in particular as a floor covering. These have a carrier plate which is provided on the top with a decor. The decor is preferably on a finish foil. The finish film is then again applied to the carrier plate, preferably laminated. A finish film in this application is usually a resinated or glued paper. The print may have been applied to the film before or after the resin or glue application. For floor finishes, finish foils are used as they have good splitting resistance. Decorative support materials that do not have a cleavage strength are unsuitable for floor applications. For protection against environmental influences, a seal is provided which, for example, consists of a paint system comprising one or more clearcoat films. In this case, in particular hardenable paints are used. These are cured by heat radiation techniques, UV radiation or electron beam radiation. Coating layers applied in this way usually lead to a more or less shiny surface.

Although it is from the DE 10 2009 044 802 A1 or the EP 1 645 339 A1 It is known to structure an uppermost sealing layer, but a substantially glossy impression of the surface remains.

In order to produce a matt surface impression, lacquers are used in the prior art which have microparticles of different size and concentration and thus create a rough surface. However, such paints are unsatisfactory in terms of their visual appearance as well as their other property in terms of transparency, abrasion and scratch resistance, haptics, etc.

From the WO 2012/013364 A1 is a method for refining transparent plastic substrates, in particular polymethyl methacrylate (PMMA short), which is also known as Plexiglas described. There, a so-called nanocomposite is proposed, the SiO _x nanoparticles, at least one highly crosslinkable binder and contains at least one reactive diluent, wherein the applied nanocomposite lacquer is cured after application first with extremely short-wave UV light only at the surface and brought to the photochemical microfolding and the remainder of the lacquer is then cured with a second UV lamp with long-wave UV light.

Out EP 2418019 A1 a method for the partial matting of UV lacquer layers is known, wherein on a support substrate, a UV lacquer layer is applied and this is subsequently treated with an excimer radiator, wherein the excimer radiator within a template, the permeable to excimer radiation and for the excimer radiation impermeable areas, is located, and the UV lacquer layer is partially exposed through the template with the excimer radiator.

Out WO 2012/048747 A1 . F. Bauer et al., Progress in Organic Coatings 69 (2010), 287-293 , and DE 10 2008 024 149 A1 surface coatings are known methods in which a lacquer layer is first partially cured by means of monochromatic radiation in the range 172 nm and the remaining layer is cured in a next step by means of vacuum UV radiation.

Out DE 10 2011 001 807 A1 is a Bodenpaneel and a method for its production is known, wherein above a carrier layer, an additional decorative layer is applied.

Out DE 10 2007 019 871 A1 is a method and an apparatus for coating a plate-shaped workpiece with a flowable medium known with a three-dimensional structure, wherein the order of the flowable medium via an engraved applicator roll takes place in such a way.

The paints used in the prior art for floor panels, which give a matte visual impression are unsatisfactory in terms of their property combinations such as good transparency, high abrasion and scratch resistance, excellent chemical resistance and UV resistance, good workability and pleasant feel.

The invention is thus based on the technical object of providing an improved panel, in particular for a floor covering, and a method for the production thereof, which create a matted surface which mats an optimum optical surface impression and at the same time a high abrasion and scratch resistance, a good chemical resistance as well as a pleasant haptic in combination offer.

The object is achieved by a method having the features of claim 1 and a panel having the features of claim 4. Advantageous embodiments of the invention will become apparent from the dependent claims.

The invention is based on the idea of providing a panel which has a carrier plate on the top side of which a decoration is applied or applied. For sealing the upper side, the panel has a paint system of one or more paint layers. In order to provide the matte surface appearance, it is provided to use a curable lacquer, to irradiate it first with very high energy light, in particular with a wavelength so-called vacuum ultraviolet wavelength range, and thereby at least partially polymerize a very thin surface layer of the lacquer and thereby harden , Due to the high photon energy, the light penetrates only in a layer of about 100 nm thickness and triggers the curing. In this process, shrinkage processes occur in the uppermost lacquer layer, which lead to a so-called photochemical microfolding. On the surface of the outermost lacquer layer, which is also referred to as the topcoat layer, thus creating a microfill. When irradiated with the very short-wave UV light (light in the ultraviolet Spectral region) thus creates a micro-skin having skin, which floats on the otherwise uncured remaining material of the top coat layer. In order to cure this remaining material of the top coat layer and to achieve complete curing of the top layer already polymerized with the very short-wave UV light and optionally further paint layers of the paint structure, a subsequent treatment with electron radiation for complete curing of the paint layers of the paint structure is performed. Under very short-wave UV light is understood in particular light with wavelengths less than 200 nm. UV light with a wavelength less than 200 nm is also referred to as VUV light or VUV radiation, where VUV is the abbreviation for vacuum ultraviolet.

It turns out that surprisingly, unlike other lacquer surfaces, such a surface of a top coat layer formed in this way has an anti-slip step of R10 according to DIN 51130. This is completely atypical for paint surfaces that otherwise have no slip resistance according to the above standard. The matted surface thus created also has improved abrasion and scratch resistance. It offers a pleasant feel. The transparency and perceptibility of the decoration located under the paint structure are not limited.

Due to the complete curing of both the top coat layer and other paint layers of the paint structure due to electron beam curing is despite the superficial microstructuring before a completely closed paint layer structure, so that a good protection against pollution, moisture and other liquids. In addition, the surface has a low tendency to make fingerprints, which result from a contact with the naked hand, in particular visible in a grazing light observation. During production, there are no panels whose surface is greasy. Furthermore, the surface shows little or no tendency for lightening in use. Overall, thus, a panel, especially for a floor covering created, which gives an excellent visual impression and also has very good mechanical properties in terms of chemical resistance, skid resistance and wear.

In addition, optimum transparency is given to the decor under the paint structure without any falsification of the visual impression.

The lacquers of the lacquer structure used are preferably all lacquers, which are clear and transparent in volume.

In particular, the invention provides a method for producing a panel, in particular for a floor covering, comprising the steps of providing a support plate, applying a decor to an upper side of the support plate, covering the decor with a lacquer structure which comprises one or more lacquer layers an outer topcoat layer of the paint system is first partially polymerized with very short-wavelength light, in particular light in the VUV wavelength range, so that a microfolding occurs, and then a complete polymerization and curing of the paint structure by means of electron beam curing is performed. The VUV wavelength range includes UV light with a wavelength less than 200 nm.

One thus obtains a panel, in particular for a floor covering, which comprises: a support plate which is provided on a top side with a decor, which is covered by a lacquer structure of one or more lacquer layers, wherein the lacquer structure comprises an outer top lacquer layer, which on its Outside has a microfolding. The microfolding is formed by a photochemical reaction.

According to the invention, the topcoat layer is structured in addition to the microstructure to form structuring depressions (wood pores, knotholes in wood reproductions, veins in stone replicas, etc.), so that the structuring depressions divide at least one material layer of the topcoat layer, in which the microstructure is or will be trained. According to the invention, a panel is obtained in which the at least one topcoat layer, in addition to the microstructure, has a deep structuring in the form of patterning recesses which divide at least one outer material layer of the topcoat layer in which the microstructure is formed. Such a structuring, in contrast to the surface structuring produced by the photochemical folding, is referred to here as deep structuring. The structuring is accordingly called deep structuring.

According to the invention, the topcoat layer is applied and cured in such a way that a surface-closed, hardened material layer is formed on an inner side opposite the outside of the topcoat layer. This ensures that a closed outer surface is formed, which has the high scratch resistance and abrasion resistance and moisture protection.
The partial polymerization with the very short-wavelength light, in particular the VUV light of an excimer laser, in particular a xenon excimer laser, is carried out so that a height of the micro-microfiltration is of the order of about 100 nm. As a result, the micro-folding is created, on the one hand, the good slip resistance and on the other hand provides a very pleasant warm feel of the material.
In order to provide improved protection of the panel, in one embodiment it is provided that the coating structure has, in addition to the outer topcoat layer, at least one further lacquer layer in the form of a basecoat layer for covering the decoration. This is preferably formed with a corundum-containing paint in an application amount of 60 g / m ² to 100 g / m ² . As a result, a sufficient hardness and abrasion resistance is achieved.
In one development of the invention, the basecoat layer or an intermediate lacquer layer which is applied between the basecoat layer and the topcoat layer and directly adjoins the topcoat layer, is made shiny. In such an embodiment, the coating structure additionally has at least one further lacquer layer which directly adjoins the top lacquer layer and is formed as a glossy lacquer layer. As a result, a stone look can be imitated deceptively real with suitably selected decor.

In one embodiment not according to the invention, the structuring depressions are introduced in such a way that parts of a lacquer layer having a glossy surface are uncovered or remain exposed. Here, in one embodiment, it is provided that at least one another lacquer layer is applied in front of the topcoat layer, which immediately adjoins the topcoat layer, and this at least one further lacquer layer is formed with a glossy surface and the outer topcoat layer is patterned in addition to the formation of the microfolding to provide patterning wells, so that at least some the structuring depressions the at least one further glossy lacquer layer partially exposed. The further, glossy lacquer layer may in particular be a base lacquer layer or an intermediate lacquer layer.

As an alternative or in addition, the at least partially polymerized material layer of the topcoat layer having the microstructure formed when the topcoat layer is irradiated can be patterned in order to create structuring depressions that divide this material layer prior to electron beam curing.

If the structuring depressions extend only into the residual material of the topcoat layer that has not yet been polymerized by the VUV radiation, glossy areas can be formed from the material of the topcoat layer itself, since then exposed areas of the not yet polymerized material of the topcoat layer during electron beam curing no microfolding occurs.

The support plate may be any suitable for a floor covering plate of a suitable material for this purpose. However, particularly preferred are high quality materials with low swelling tendency and low thermal expansion.

Particular preference is given to carrier plates made of mineral material, for example gypsum plasterboard, gypsum fiberboard, cement fiber board, cement particleboard or magnesium oxide plates. It is also possible to use wood composite materials, such as in the form of high-density fiberboard (HDF).

The decor is applied to the top of the carrier plate in one embodiment by means of a printed finish foil. The finish foil can be based on a white paper, which is printed in color, with any desired colors. Likewise, however, the finishing film can also be dyed through in the volume and optionally additionally printed in color.

The decor can also be applied by means of a different printed or otherwise graphically designed film. Generalized is spoken of a finish foil, which can also be a decorative paper.

The application of the finish film is preferably carried out by lamination, wherein a polyvinyl acetate glue (PVAc glue) with hardener or a polyurethane hotmelt, in particular a reactive polyurethane hotmelt, or an epoxide hotmelt is used in the lamination.

In a preferred embodiment, a footfall sound insulation layer is additionally applied to an underside of the support plate, which is also preferably carried out by means of a lamination using a polyvinyl acetate adhesive with hardener, a polyurethane hotmelt or an epoxy hotmelt. As a result, a footfall sound insulation for the panels is improved. When laying a separate introduction of a footfall sound insulation layer can be saved or improved footfall sound insulation can be achieved by the additional applied to the panel impact sound insulation layer.

Fig. 1

ein schematisches Flussdiagramm für ein Verfahren zur Herstellung eines Fußbodenpaneels mit matter Oberflächenoptik;

Fig. 2

eine schematische Schnittdarstellung eines Fußbodenpaneels; und

Fig. 3

eine schematische Darstellung einer Vorrichtung zur Herstellung eines Fußbodenpaneels.

The invention will be explained in more detail with reference to a drawing. Hereby show:

Fig. 1

a schematic flow diagram for a method for producing a floor panel with a matt surface appearance;

Fig. 2

a schematic sectional view of a floor panel; and

Fig. 3

a schematic representation of an apparatus for producing a floor panel.

In Fig. 1 schematically a flow diagram of a method 100 for producing a panel for a floor covering is shown. First, a support plate 110 is provided which may already be provided with groove and spring recesses on the end edges.

On a top of the support plate, a decor is applied 120. In the illustrated embodiment, the decor is applied by means of a finish foil. A finish foil is a foil that consists of a preimpregnated paper. For this purpose, for example, the printed finish film is provided 130, which is made in particular on the basis of a printed decorative paper. Here, any decorative paper and any printing can be selected as long as a lamination to the material of the support plate is possible. The printed decor paper or generally the finish film is laminated onto the upper side of the carrier plate 140. In this case, preference is given to using a reactive polyvinyl acetate glue, a polyurethane hotmelt or an epoxy hotmelt. To protect the upper side of the carrier plate provided with the decoration, this carrier plate provided with the decoration is sealed with a paint system 150. First, a corundum-containing basecoat layer with an application amount of preferably 60 g / m ² to 100 g / m ^{2 is} applied to the finish film 160. Depending on the nature of the finish film, it may be necessary to apply a primer first.

In subsequent steps, one of which is shown here by way of example, none, one or more intermediate lacquer layers are applied over the base lacquer layer 170. The corundum-containing intermediate lacquer layers are preferably applied in an application amount of 60 g / m ² to 100 g / m ² . Both the base coat layer and the intermediate coat layers, but in particular the uppermost intermediate coat layer, are preferably formed as a glossy layer.

Finally, a topcoat layer 180 is applied to the outermost layer of the resist structure. To this end, a nanocomposite lacquer is first applied in an amount of between 5 g / m ² and 20 g / m ² 190. The nanocomposite lacquer is preferably an acrylate lacquer which Nanoparticles, preferably SiO _x nanoparticles. The diameters of the nanoparticles are preferably below 300 nm.

The applied nanocomposite lacquer is then irradiated with very short-wave ultraviolet light, preferably in the vacuum ultraviolet spectral range 200. This partial polymerization of the topcoat layer is carried out, which also leads to a photochemical microfolding. As a result of shrinkage effects occurring during the polymerization, the outermost surface of the topcoat layer is thus structured irregularly. This structuring is referred to as microfolding. During the irradiation with the VUV light, which is provided, for example, by a xenon excimer laser, an uppermost material layer of the topcoat layer is partially polymerized with a layer thickness of about 100 nm. It thus forms a kind of skin which floats on the not yet polymerized remainder of the topcoat layer.

Subsequently, irradiation with electron radiation is carried out in order to cure the topcoat layer and optionally further not yet or not completely polymerized paint layers of the paint system 210. In this process step, the microstructure formed by the partial polymerization under VUV irradiation remains intact. Due to a high efficiency in the double bond conversion and an additional generation of radicals during irradiation with the VUV light, a particularly high degree of crosslinking is achieved in comparison to conventional UV curing. As a result, a significant increase in the curing of the outer, the micro-forming outer material layer of the topcoat layer is achieved. This is further enhanced by the fact that the subsequent electron beam curing is carried out.

After completion of the paint structure, a footfall sound insulation layer is preferably applied 220. First, the footfall sound insulation layer 230 is provided. The footfall sound insulation layer is laminated onto an underside of the support plate 240. This is preferably carried out with a reactive polyvinyl acetate glue or alternatively with a polyurethane hotmelt or an epoxy resin. hotmelt. A thickness and condition of the impact sound insulation layer is selected according to the requirements at the planned installation location of the panels.

Finally, the provided with the decor and the paint structure carrier plate is reworked 250, wherein the carrier plate optionally divided and / or groove and tongue are milled into end edges.
The method described so far represents only an exemplary and schematically slightly simplified embodiment. In the method according to the invention, the cover layer is additionally deep-structured, with a surface-closed, hardened material layer being formed on the inside of the cover slip. The individual process steps shown may be subdivided into a plurality of sub-steps, in particular the application of the base coat layer and the intermediate coat layers. In addition to the application, drying and partial curing steps, for example by irradiation with soft UV radiation or by thermal polymerization, may also be carried out here.
In addition, individual process steps can also be performed in different order. For example, a lamination of the impact sound insulation could also be carried out as a final process step. Likewise, a milling of groove and spring components in the end faces of the panel can be made before a lamination of the impact sound insulation.
In Fig. 2 schematically a section of a cross section through a finished panel 1 is shown. The individual layers are shown only schematically and not shown to scale relative to each other both in terms of their internal structure and their strength ratios.
The panel 1 comprises as a main component a support plate 2. This may, for example, a plate of a mineral material, such as a gypsum composite, so for example, a plasterboard or a gypsum fiber board, act. Other mineral materials or wood-based materials are also suitable, for example a high-density fiberboard (HDF). On a bottom 4 of the support plate 2, a footfall sound insulation layer 5 is laminated. The lamination is preferably carried out with a polyvinyl acetate glue which contains a hardener, or a polyurethane hotmelt or an epoxy hotmelt.
On a top 3 of the support plate 2, a decor is applied. In the illustrated embodiment, a printed finish film 6, which preferably consists of a paper material, is applied for this purpose. The finish foil 6 is on the top 3 of the Support plate 2 preferably laminated. For this purpose, a reactive Polyvinylacetatleim, a polyurethane hotmelt or an epoxy hotmelt can be used.
To protect the finish film 6 and the top 3 of the support plate 2, a paint system 7 is applied to the finish film 6. The paint system 7 comprises in the illustrated embodiment, first, a base coat layer 8, an applied thereon intermediate lacquer layer 9 and an outer topcoat 10. The corundum basecoat 6 is a clearcoat, which is applied so that an application rate of 60 g / m ² to 100 g / m ² results. Also, the corundum-containing intermediate coating layer 9 formed thereon preferably has an application amount of 60 g / m ² to 100 g / m ² . The intermediate lacquer layer 9 is preferably formed so that an upper side 11 of the intermediate lacquer layer 9 is formed shiny. Also, the lacquer of the intermediate lacquer layer is a clear, transparent lacquer.
The topcoat 10 is applied to the top 11 of the intermediate coat 9. The topcoat layer 10 has on an upper side 12 an outer thin material layer 13 with a micro stop 14. The micro-cladding 14 in the outer thin material layer is formed via a partial polymerization of the applied topcoat layer 10 during an irradiation of extremely short-wave UV light in the vacuum ultra-violet wavelength range, ie with light whose wavelength is less than 200 nm. Particularly suitable for this purpose is the radiation of a xenon excimer laser whose radiation has a wavelength of 172 nm. The microfolding is due to shrinkage processes that have occurred in the partial polymerization initiated by the irradiation with the VUV light. Due to a low penetration depth of the VUV radiation or of the VUV light, the outer thin material layer (13) has a material layer thickness 15 of approximately 100 nm.

The residual material 16 of the topcoat layer 10 is fully cured by electron beam curing and crosslinked. Due to this exposure to electron radiation, the outer thin material layer 13 of the topcoat layer 10 as well as the basecoat layer 8 and the intermediate lacquer layer 9 are completely cured. Thus, all layers of the paint assembly 7 are completely cured. As a result, a complete sealing of the finish foil 6 or upper side 3 of the carrier plate 2 is achieved.

The finished panel 1 now has a matte optical structure and beyond a pleasant feel. In addition, the photochemically produced micro-cladding 14 which has been retained during electron-beam curing leads to the panel having a slip resistance according to DIN 51130 of R10. During production, there are no panels showing baconiness. The extremely low gloss of the surface of the panel is maintained even when the surface is touched with an unprotected palm. The surface does not tend to visually reproduce fingerprints. A tendency to glare is also absent.
Notwithstanding the in Fig. 2 described embodiment, in which the topcoat layer is initially applied areally with approximately constant paint layer thickness, a structured application of the paint layer is possible, so that different paint layer thicknesses of the topcoat layer already exist before carrying out the first curing step. Here, coarser structures for deep structuring can be realized. This can be done for example by applying the topcoat with a structured paint application roller.
If a matt-gloss surface structure is to be produced, in which deepened areas resulting from the deep structuring show a gloss effect in structuring depressions such as wood pores or other structures, but the rest of the surface has a matt surface impression, then advantageously at least those directly adjacent to the topcoat layer Intermediate lacquer layer or the base lacquer layer, if no intermediate lacquer layer exists, formed as a glossy lacquer layers.

Alternatively or additionally, a deep structuring can take place via a structured roller, in that fine structures are pressed into the not yet completely cured topcoat layer.
In any case, the deep structuring is carried out so that their structures have structure depths which are greater than the structure depths of the microstructuring due to the microstructure.
Preferably, the deep structuring will be done between the VUV curing step and the electron beam curing step. This can be achieved in a simple manner that the micro-layer is not completely closed. In the subsequent electron beam hardening, high-gloss sections thus arise in the deep-structured area. Nevertheless, the overall impression of the surface is dull and only at certain viewing angles is a gloss effect observable in small areas. As a result, stone surfaces can be imitated deceptively real with appropriately selected graphic print decor.
In Fig. 3 schematically a device 300 for producing a panel 1 with a matte finish is shown. The device 300 is designed as a production line. First, a carrier plate 2 is provided. In a decorative station 310, the decor is applied to the upper side 3 of the carrier plate 2. In the illustrated embodiment, this is designed as a laminating station in which a finish foil 6, preferably a printed decorative paper, is laminated onto the upper side 3 of the carrier plate 2. Alternatively, it is possible to directly print on the carrier plate 2 on its upper side. Subsequently, the base coat is applied in a first painting station 320 with a paint application device 330. The application of the paint can take place in any suitable form, for example via a roller or the like. Optionally, in a first curing device 340, partial polymerization, drying or the like of the base coat layer may be carried out. In a second painting station 350, the intermediate lacquer layer is applied analogously. The second painting station likewise comprises a paint application device 360 and optionally a second curing device 370, for example a UV light source or the like.
A topcoat application device 400 comprises a paint application device 410 for applying the topcoat layer and a VUV light source 420, for example a xenon excimer laser, for partially polymerizing the topmost material layer of the topcoat layer and forming the microfill. For subsequent electron beam curing, an electron beam device 430 is provided.
After the electron beam hardening, in the illustrated embodiment, a footfall sound insulation layer 5 is laminated on the underside of the support plate 2 in a footfall sound insulation laminating station 440. Connecting is usually carried out at a post-processing station 450, a division of the support plate and / or introduced tongue and groove in the support plate or the plate sections, preferably milled. Finally, one or more finished panels 1 are present.
It will be apparent to those skilled in the art that only a greatly simplified production facility is described herein and individual intermediate processing and refining stations and steps are not described.

LIST OF REFERENCE NUMBERS

1

paneling

2

support plate

3

Top side (the carrier plate)

4

Bottom (the carrier plate)

5

impact sound insulation

6

finish foil

7

paint system

8th

Base coat layer

9

Intermediate coat layer

10

Topcoat

11

Top (the intermediate lacquer layer 9)

12

Top side (the topcoat layer)

13

material layer

14

micro fold

15

material thickness

16

Residual material (the topcoat layer)

100

Process for the production of a panel

110

Providing a carrier plate

120

Applying a decoration on the carrier plate

130

Providing a printed finish foil

140

Laminate the finish foil

150

Applying a paint structure

160

Applying a base coat layer

170

Applying an intermediate lacquer layer

180

Forming the topcoat layer

190

Applying a nanocomposite paint

200

Irradiation with VUV light

210

electron beam

220

Applying a footfall sound insulation layer

230

Providing a footfall sound insulation layer

240

Laminate the

250

Reworking (cutting and / or milling in tongue and groove)

300

Device for producing a panel (production line)

310

decorative furnishings

320

first painting station

330

Paint applicator

340

curing apparatus

350

second painting station

360

Paint applicator

370

curing apparatus

400

Topcoat application device

410

Paint applicator

420

VUV light source

430

electron beam device

440

Trittschalldämmungskaschiervorrichtung

450

post-processing station

Claims (9)

1. Method for producing a panel (1) for a floorcovering, comprising the steps:

   providing a core board (2),

   applying a decoration to an upper side (3) of the core board (2),

   covering the decoration with a lacquer structure (7) which comprises one or more lacquer layers,

   an outer top lacquer layer (10) of the lacquer structure (7) initially being irradiated with short-wave UV light and in this way at least partially polymerised, so that micro-creasing (14) occurs,

   characterized in that

   complete polymerisation of the lacquer structure (7) is then carried out by means of electron-beam curing, and

   in that the top layer is additionally depth-structured, forming structuring depressions, so that the structuring depressions divide at least an outer material layer (13) of the top lacquer layer (10), in which the micro-creasing (14) is formed,

   wherein the top lacquer layer (10) is applied and cured in such a way that an extensively closed, cured material layer is formed on an inner side of the top lacquer layer (10), located opposite the outer side.
2. Method according to Patent Claim 1, characterized in that, before the irradiation with the short-wave UV light to form the micro-creasing (14), the top lacquer layer (10) is depth-structured.
3. Method according to Patent Claim 1, characterized in that the at least partially polymerised outer material layer (13) of the top lacquer layer (10) formed during the irradiation of the top lacquer layer (10) and having the micro-creasing (14) is depth-structured, in order to create structuring depressions dividing this outer material layer (13) before the electron-beam curing.
4. Panel (1), in particular for a floorcovering, comprising
   a core board (2),
   which is provided with a decoration on an upper side (3),
   which is covered by a lacquer structure (7) of one or more lacquer layers,
   the lacquer structure (7) comprising an outer top lacquer layer (10) which has micro-creasing (14) on its outer side,
   characterized in that
   in addition to the micro-creasing (14), the top lacquer layer (10) has depth structuring in the form of structuring depressions, which divide at least one outer material layer (13) of the top lacquer layer (10) in which the micro-creasing (14) is formed,
   wherein the top lacquer layer (10) has an extensively closed material layer on an inner side located opposite the outer side.
5. Panel (1) according to Claim 4, characterized in that a height of the micro-creasing (14) is of the order of magnitude of 100 nm.
6. Panel (1) according to either of Claims 4 and 5, characterized in that the lacquer structure (7) additionally has at least one further lacquer layer (8, 9), which adjoins the top lacquer layer (10) directly and is formed as a glossy lacquer layer.
7. Panel (1) according to one of Claims 4 to 6, characterized in that the decoration is formed by means of a finishing foil (6) laminated onto an upper side (3) of the core board (2), and/or a footstep damping layer (5) is laminated onto an underside (4) of the core board (2).
8. Panel (1) according to one of Claims 4 to 7, characterized in that at least the top lacquer layer (10), preferably all the lacquer layers, of the lacquer structure (7) are cured completely by means of electron-beam curing.
9. Panel (1) according to one of Claims 4 to 8, characterized in that the lacquer layers (8, 9, 10) of the lacquer structure (7) are respectively clear in the volume when completely cured.

Images