Method for manufacturing a construction device for structuring a surface of an embossable material, and such construction device

Abstract

The invention relates to a method for producing a construction device for structuring the surface of an embossable material, comprising the following steps: providing a web-shaped carrier material (5) made of paper and / or plastic, applying a layer of ultraviolet-hardening lacquer (7) made of acrylic oligomers on the carrier material (5), shaping three-dimensional embossing structures (13) in the lacquer layer (7) applied on the carrier material (5), curing the lacquer layer (7) by means of high-energy radiation during the shaping of the embossing structures (13). Before applying the layer of ultraviolet-hardening lacquer (7), at least one layer of an adhesion promoter (8) consisting of acrylic oligomers, reactive diluent and a photoinitiator which is reactive with high-energy radiation is applied on the carrier material (5), and the lacquer layer (7) with the embossing structures (13) is cured by irradiation with high-energy radiation. Furthermore, the invention relates to such a construction device (17).

Description

TECHNICAL FIELD

[0001] The present invention relates to a method for producing a construction device for structuring the surface of an embossable material, in particular the surface of a resin-containing laminate, comprising the following steps: providing a web-shaped carrier material made of paper and / or plastic, applying a layer of a UV-hardening lacquer made of acrylic oligomers on the carrier material, shaping a three-dimensional embossing structure in the lacquer layer applied on the carrier material, and curing the lacquer layer by high-energy radiation, preferably UV irradiation, during the shaping of the embossing structure.

[0002] In the present invention, high-energy radiation irradiation particularly refers to UV light (UV light) irradiation and electron beam irradiation.

[0003] Furthermore, the present invention also relates to a construction device for structuring the surface of an embossable material, in particular the surface of a resin-containing laminate, in particular produced according to the method of the present invention, having a web-shaped carrier material made of paper and / or plastic, and a lacquer layer made of acrylic oligomers applied on the carrier material, the lacquer layer having a three-dimensional embossing structure. The construction device can also be referred to as an embossing die. BACKGROUND

[0004] Decorative laminates are known in the prior art, for example, as floor coverings or as surface materials for walls, ceilings or furniture, such as cabinets, worktops and table tops or similar furniture. Such laminates usually consist of a substrate, such as a medium- or high-density fiberboard or a resin-impregnated paper layer, a decorative layer and a transparent protective layer applied thereon. The function of the protective layer is to protect the decorative layer from wear and tear, in particular from scratching. For example, conventional floor laminate panels have a layer of transparent, cured, melamine resin-impregnated cover paper as a protective layer. The material of the protective layer usually contains particles that increase the resistance to wear, such as quartz or corundum particles.

[0005] In order to accurately imitate the appearance and feel of natural materials such as wood flooring or stone slabs with decorative laminates, such laminates in the prior art have a three-dimensional surface structure, which preferably corresponds to the printed image of the decorative layer of the laminate panel. For example, in order to imitate a wood panel, when pressing a laminate structure comprising a wood decorative paper, indentations are pressed into the transparent protective layer, wherein the indentations substantially overlap the wood pores depicted on the wood decorative paper. The formation of such indentations corresponding to the displayed pores is also referred to in the professional field as synchronous pores.

[0006] In the prior art, decorative laminates with multicolored or monochromatic (unidecor) decorations are also known, for example, table or tabletop laminates with a three-dimensional surface structure on the transparent protective layer or top layer.

[0007] In order to produce laminates having a three-dimensional surface structure, the prior art uses, for example, press plates having a surface structure formed by engraving. The laminates are produced using so-called short-cycle presses (KT presses) at high pressure and high temperature, wherein the engraved press plates are mounted on the press plate facing the transparent solidification protection layer. During the pressing of the laminates, for example, temperatures of more than 120°C and pressures of more than 50 bar prevail. The production of engraved press plates is very cost-intensive. Furthermore, due to the high pressure load, the press plates are also subject to high wear.

[0008] Furthermore, it is known from the prior art that the surface of resin-impregnated laminates is structured using pressure and temperature by means of a web-like structuring device, also referred to as an embossing die, even if the laminate surface has a three-dimensional surface structure.

[0009] For example, a method for producing such a web-like structuring device is described in EP 2 146 805. The method provides for applying a curable coating on a web-like plastic film and then bringing it into contact with a structure roll. During the contact with the structure roll, the coating is cured by means of electron or UV radiation, causing a three-dimensional structure to be permanently transferred to the coating of the plastic film. The cured coating is then peeled off from the structure roll together with the plastic film. Here, before curing, the coating contains 20 to 50% of an acrylic oligomer, 15 to 35% of a monofunctional monomer and 20 to 50% of a multifunctional monomer for crosslinking. The investment costs for curing the coating using electron radiation are high and the energy consumption is high. Furthermore, it has been shown in the subsequent processing of the method described in EP 2 146 805 that the adhesion of various resins or radiation-cured lacquers on the web-like carrier material is often insufficient, so that parts of the resins or lacquers deposit in the structures of the structure roll and cure there. The cured coating on the web-like carrier material thus exhibits recurring surface defects. Cleaning the structure roll in order to completely remove the resin or lacquer deposits from its structures is very laborious.

[0010] EP 3 720 673 discloses another method for transferring an embossed structure to at least a portion of the surface of a coating agent. The basic steps of the method are carried out using an embossing die as an embossing tool, which is composed of a substrate and a coating which is embossed and at least partially cured. The coating agent used to produce the composite coating is a radiation-curable coating agent of defined composition. EP 3 720 673 teaches that preferably no further layers are present between the substrate and the composite coating. However, internal tests have shown that the method described in EP 3 720 673 does not produce satisfactory adhesion between the substrate and the relatively hard coating; on the contrary, when the corresponding composite material is used as an embossing die under conventional pressing conditions at a temperature of approximately 185°C and a pressure of more than 50 bar, the coating peels off (delaminates) from the substrate.

[0011] In DE 10 2013 007 429 it is proposed to produce a structured surface film or a structured embossing mold using a polyethylene terephthalate film (PET film) etched on at least one surface. The etched PET film should have excellent wettability and adhesion to the resins or paints used for the coating, so that no resin or paint deposits occur on the structured structure rollers used in the production of the structured surface film or embossing mold. For the etching of the PET film, DE 10 2013 007 429 proposes the use of trichloroacetic acid in the presence of precipitated silicon dioxide. This method of treating the PET film, although it can improve adhesion, is problematic from an environmental point of view. In addition, such films are difficult to obtain on the market. SUMMARY

[0012] On this basis, it is the object of the present application to provide a method of the kind mentioned at the outset, with which a structured device for structuring the surface of embossable materials, in particular of resin-containing laminates, can be produced at low cost, which has a high mechanical and thermal resistance when used in a press. In particular, a corresponding structured device is to be provided.

[0013] The object of the present application is achieved by a method having the features of claim 1 or a structured device having the features of claim 14. Advantageous embodiments of the solution according to the application are the solutions of claim 1 or claim 14.

[0014] The method according to the application is characterized in that, before the application of the layer of ultraviolet-hardening paint, at least one layer of an adhesion-promoting agent consisting of an acrylic oligomer, a reactive diluent and a photoinitiator that can react with high-energy radiation, preferably ultraviolet radiation, is applied to the carrier material, and the layer of paint with the embossed structure is irradiated with high-energy radiation, preferably ultraviolet radiation, so that it cures, so that in the cured state the structured device has an average Martens hardness of 10 to 80 N / mm 2 , preferably 30 to 80 N / mm 2 , according to the DIN EN ISO 14577 standard, wherein the indenter used for measuring the Martens hardness is pressed into the surface of the layer of paint with the embossed structure.

[0015] By means of at least one adhesion-promoting agent layer (primer layer) according to the application, a structured device for structuring the surface of embossable materials, in particular of resin-containing laminates, can be produced at low cost using the method mentioned at the outset, which has a high mechanical and thermal resistance when used in a press.

[0016] The adhesion-promoting layer according to the application makes it possible for a lacquer layer which can be cured partially or completely after the formation of a three-dimensional embossed structure in the lacquer layer by means of high-energy radiation, preferably UV radiation, to adhere well to the carrier material, so that, whether the cured lacquer layer is removed together with the carrier material from the embossing device used to form the embossed structure or the structured device produced in this way is removed from the material or the laminate surface structured with it, the structured lacquer layer does not detach or flake off from the carrier material in a manner visible to the naked eye or in an unacceptable manner.

[0017] The crosshatch test according to DIN EN ISO 2409 (date: June 2013) is generally used to determine the adhesion of a coating. Although the test result does not provide any direct measurement, it can be evaluated by comparison with standard images showing different degrees of damage (characteristic values). The standard specifies the use of a cutting blade of a certain shape and size as test equipment. When using a multi-blade device for the measurement, a continuous cutting band consisting of a plurality of parallel cuts is to be made on the coating to be tested up to the substrate. Then, at right angles thereto, another cutting band is to be made. This results in a grid with a large number of squares, the so-called crosshatch. In the evaluation, an adhesive tape with a certain adhesion is pressed onto the crosshatch and then pulled off the surface in order to remove the detached parts. By comparison with the standard images, the characteristic values Gt0 to Gt5 can be obtained, wherein Gt0 indicates a low damage with no peeling of the coating and Gt5 indicates a high detachment or high damage with a peeling area of more than 65%.

[0018] Using the method according to the application, it is possible to produce a structured device with a very good adhesion of the structured lacquer layer to the carrier material. The crosshatch test according to DIN EN ISO 2409 (date: June 2013) shows that the crosshatch characteristic value of the structured device produced according to the application is 0 to less than / equal to 0.5.

[0019] In the case of lacquers which can be hardened by means of high-energy radiation, preferably UV radiation, the adhesion-promoting layer makes it possible to achieve a wide processing range from elastic to hard. Furthermore, the acrylate oligomer lacquer which can be hardened by means of high-energy radiation, preferably UV radiation, used according to the method according to the application makes it possible for the lacquer layer produced therefrom or the embossed structure formed therein to have a high hardness. According to the application, the average Martens hardness of the structured device in the finished state is 10 to 80 N / mm 2 , preferably 30 to 80 N / mm 2When used in a heated press, this facilitates an improved mechanical and thermal resistance of the constructional device. The relatively hard embossed structure can prolong the service life of the constructional device. Furthermore, the high hardness of the lacquer layer including the embossed structure facilitates an improved forming accuracy, in particular when pressing a negative structure into the surface of a embossable material or a resin-containing laminate. This way, for example, a correspondingly structured floor panel or laminate can be produced, which has a relatively high surface roughness or roughness depth Rz according to the DIN EN ISO 4287 standard.

[0020] When determining the indentation hardness or Martens hardness according to DIN EN ISO 14577, the test force F and the indentation depth h are measured continuously during the loading and unloading phase. The definition of the Martens hardness (HM) is the ratio of the maximum force F to the corresponding contact area of the test body, in units of N / mm 2 . The test body (indenter) is a pyramid-shaped or spherical indenter, which is slowly pressed into the surface to be measured at a constant speed. The conversion between the indentation depth and the contact area must be determined for each indenter shape. For the Vickers or Berkovich pyramid indenter, which is usually used as an indenter, the contact area is calculated by the product of the square of the indentation depth h and the constant 26.43. This is the so-called Martens hardness (HM), which is calculated as follows: HM = F / (26.43 · h 2 ).

[0021] The Martens hardness is measured using a FischerScope HM2000S brand measuring device from the company Helmut Fischer, at a measurement temperature of approximately 23°C and a relative air humidity of approximately 50%. The measurement is carried out in accordance with the DIN EN ISO 14577 standard, with a test range of 300 mN / 20 s to a maximum test force of 300 mN.

[0022] According to an advantageous design of the method according to the application, at least one adhesion promoter layer is applied to the carrier material, the layer thickness of which, based on the dry state of the adhesion promoter layer, is in the range from 0.5 to 12 pm, preferably in the range from 1 to 10 pm, particularly preferably in the range from 2 to 5 pm. The thickness of the applied adhesion promoter layer is preferably as thin as possible. The inventors have surprisingly found that this allows a particularly good adhesion between the lacquer layer and the carrier material. The inventors assume that a thin adhesion promoter layer can improve or intensify the bond between the lacquer layer and the carrier material, since a thin adhesion promoter layer can also form a chemical bond between the substrate surface of the carrier material and the binder of the lacquer layer.

[0023] The adhesion promoter layer is preferably dried or cured to at least the point of contact drying before the application of the UV-hardening coating.

[0024] As already mentioned above, the at least one adhesion promoter layer applied on the carrier material in the method according to the application can be specified in more detail, in particular with regard to the layer thickness in the dry state. Alternatively or additionally, the at least one adhesion promoter layer can be specified in more detail with regard to the weight per area (coating weight) in the dry state, which can be calculated from the thickness and the density of the adhesion promoter applied on the carrier material in the dry state. If the carrier material is made of a film, or if the surface provided with the adhesion promoter is defined by a film, the weight per area of the adhesion promoter in the dry state is for example in the range of about 0.3 to 15 g / m2, preferably in the range of about 1 to 5 g / m2. If the carrier material is paper, or if the surface provided with the adhesion promoter is made of paper, the weight per area of the adhesion promoter in the dry state is in the range of about 1 to 15 g / m2, preferably in the range of about 4 to 7 g / m2. 2 2 2 2

[0025] A further advantageous design feature of the method according to the application is that a web-shaped carrier material made of paper and / or plastic, which is at least partially permeable to high-energy radiation, in particular to UV light, is used as the web-shaped carrier material, wherein the curing of the lacquer layer takes place by means of high-energy radiation, preferably UV irradiation, in the process of embossing the structure, such that the irradiation is at least partially directed away from the side of the carrier material on which the embossing structure is formed.

[0026] In this way, the web-shaped carrier material can be moved at a relatively high conveying speed through the device for forming the three-dimensional embossing structure, for example a device equipped with an embossing roller, wherein the initially flowable lacquer layer is hardened sufficiently quickly at a favorable location within the device by means of at least one high-energy radiation, preferably a UV radiator, during the process of forming the embossing structure, such that the carrier material and the lacquer layer with the embossing structure are extracted or removed from the embossing roller or embossing tool in a form-stable manner. This design of the application is particularly advantageous in terms of production technology.

[0027] The web-shaped carrier material which is at least partially permeable to high-energy radiation, in particular to UV light, used in the method according to the application can also be referred to as a transparent web-shaped carrier material. A transparent carrier material is understood to mean a light-permeable carrier material, which can be transparent or light-permeable. A transparent material allows most of the light to pass through, usually with a small amount of light being absorbed and scattered. Thin films made of polyethylene terephthalate (PET), polycarbonate (PC) or polymethyl methacrylate (PMMA) are examples of such transparent carrier materials. A light-permeable material is characterized in that light can pass through the material, but is scattered in the material. An example of a light-permeable carrier material is paper, in particular so-called parchment paper, which can be more or less light-permeable depending on the design. The grammage of the transparent paper can be for example in the range of 80 to 180 g / m2.​​​​2 between 900 and 1760 mJ / cm 2 , in particular between 1300 and 1500 mJ / cm 2 . 2

[0028] The web-shaped carrier material used according to the application can transmit, for example, 60 to 80 % of the UV radiation dose in the range of 1500 to 2200 mJ / cm 2 . The measured transmitted UV radiation is approximately between 900 and 1760 mJ / cm 2 , in particular between 1300 and 1500 mJ / cm 2 .

[0029] A further advantageous design feature of the method according to the application is that a web-shaped material consisting of paper is used as the web-shaped carrier material, wherein an aqueous adhesion promoter is applied to the carrier material to produce an adhesion promoter layer, wherein the adhesion promoter layer is dried at least in the surface region before the UV-hardening lacquer layer is applied thereon, and wherein the drying temperature is between 80 °C and 160 °C, preferably between 90 °C and 140 °C, particularly preferably between 100 °C and 120 °C.

[0030] The water content of the aqueous adhesion promoter can increase the adhesion of the adhesion promoter to the fibres of the paper web. By means of the drying process, the water content is removed or greatly reduced. In this way, a relatively thin adhesion promoter layer can be obtained, which produces a particularly good adhesion between the base material surface of the web-shaped carrier material (paper) and the adhesive of the UV-hardening lacquer layer.

[0031] One advantageous variant of the method according to the application provides that a plastic film is used as the web-shaped carrier material, wherein the adhesion promoter layer is at least partially cured by means of high-energy radiation, preferably UV radiation, in particular UV-C radiation, before the UV-hardening lacquer layer is applied to the adhesion promoter layer, so that the adhesion promoter layer is cured on its surface and / or substantially no longer has tackiness, wherein the photoinitiator of the adhesion promoter layer is suitable for absorbing light having a wavelength in the range of 250 to 350 nm, preferably in the range of 270 to 330 nm, and the adhesion promoter layer is cured with a UV radiation dose of 60 to 200 mJ / cm 2 , preferably 100 to 160 mJ / cm 2 .

[0032] The use of a plastic film as a web-shaped carrier material has advantages in terms of material costs and the firmness of the carrier material, and thus in terms of the firmness of the construction. Pre-hardening or hardening of the adhesion promoter layer before the application of the UV-hardening lacquer layer, which solidifies the surface and / or makes it substantially non-tacky, increases the adhesion between the base material surface of the carrier material (plastic film) and the adhesive of the UV-hardening lacquer layer. This design has the particular advantage that the adhesion promoter can be optimally effective directly at the interface, and thus a relatively small amount of adhesion promoter can achieve a high or very good adhesion value. The light initiators used in the adhesion promoter layer according to the design can rapidly and with high energy efficiency solidify or at least pre-solidify the adhesion promoter layer at the specified UV radiation dose, and thus allow high-speed production of the construction.

[0033] A further advantageous embodiment of the application is that the adhesion promoter layer contains 10 to 90% by weight, preferably 40 to 70% by weight, of an acrylic oligomer, at least 8% by weight, preferably at least 20% by weight, of a reactive diluent, 0.5 to 10% by weight of a UV radiation-reactive light initiator, and optionally 0.1 to 3% by weight of one or more additives from the group of antifoams and base material wetting agents, wherein the sum of the amounts of all components contained in the adhesion promoter layer amounts to 100% by weight. The acrylic oligomer is preferably at least difunctional or trifunctional, and particularly preferably higher functional. For example, urethane acrylates can be used as acrylic oligomers. The reactive diluent reduces the viscosity of the adhesion promoter. A low-viscosity adhesion promoter facilitates the formation of a thin, full-surface adhesion promoter layer on the base material surface of the web-shaped carrier material with a small amount of adhesion promoter. For this reason, the viscosity of the adhesion promoter is preferably reduced to a minimum.

[0034] The optional inclusion of an antifoam in the adhesion promoter serves to eliminate (dissolve) air or gas inclusions that occur in the liquid adhesion promoter layer. These inclusions occur in the form of foam bubbles, such as microfoam and macrofoam, and can cause pores and indentations in the adhesion promoter layer, which can prevent optimal adhesion between the base material surface of the web-shaped carrier material and the adhesive of the subsequently applied UV-hardening lacquer layer, and / or reduce the surface quality of the construction.

[0035] The optional inclusion of a base material wetting agent in the adhesion promoter serves to adjust the interfacial energy between the base material surface of the web-shaped carrier material and the liquid adhesion promoter. For example, the base material wetting agent can reduce the interfacial energy or surface tension of the base material. This allows the wetting of the base material surface to be optimized, so that all areas of the base material surface are uniformly and well wetted, and thus a well-adhered, pore-free adhesion promoter layer is obtained.

[0036] UV radiation active diluents which can be used in the adhesion promoter include, for example, 1,6-hexanediol diacrylate (HDDA), dipropylene glycol diacrylate (DPGDA), tripropylene glycol diacrylate (TPGDA), ethylene glycol dimethacrylate (EGDMA), triethylene glycol divinyl ether (DVE-3) or combinations / mixtures of these diluents. Photoinitiators which can be used in the UV radiation active adhesion promoter layer include, for example, monoacyl phosphine oxides (MAPO), bisacyl phosphine oxides (BAPO), 2-hydroxy-2-methylphenylpropanone (HMPP), 1 -hydroxycyclohexyl phenyl ketone (CPK) and / or methylbenzoyl formate (MBF).

[0037] Optionally, the adhesion promoter layer can contain aminopropyl triethoxysilane (AMEO), for example, in a proportion of 3 to 8% by weight.

[0038] According to a further embodiment of the method according to the application, the lacquer for the UV radiation hardenable lacquer layer contains

[0039] 30 to 95% by weight of an acrylic oligomer,

[0040] 10 to 70% by weight of a monofunctional or polyfunctional monomer,

[0041] 1 to 5% by weight of a photoinitiator, and optionally

[0042] 1 to 6% by weight of one or more additives, including antifoams, substrate wetting agents, release additives, waxes and anti-settling agents, wherein the content of all components in the UV radiation hardenable lacquer adds up to 100% by weight. The UV radiation hardenable lacquer of the respective composition makes it possible for the lacquer layer produced therefrom or the embossed structure formed therein to have a high hardness.

[0043] The inventors have surprisingly found that a UV radiation hardenable lacquer composed in this way can be used to produce the construction device of the kind mentioned at the outset at low cost, which has a very high hardness and a high degree of accuracy of the embossed structure formed in the lacquer layer, and, as a result, the construction device according to the application can be used to emboss a correspondingly large structure depth into the surface of an embossable material, in particular a resin-containing laminate, without there being a significant or considerable loss of depth.

[0044] According to another embodiment, the lacquer for the ultraviolet-hardening lacquer layer contains 50 to 95% by weight of acrylic oligomers and / or 10 to 40% by weight of monofunctional or polyfunctional monomers and / or 1 to 3% by weight of a photoinitiator and / or 1 to 5% by weight of one or more additives, including antifoams, substrate wetting agents, release additives, waxes and anti-settling agents, the total weight of all components contained in the ultraviolet-hardening lacquer amounting to 100% by weight. By using this lacquer, a construction device of the type mentioned at the outset can be realized particularly advantageously. The combination of a higher proportion of acrylic oligomers with monofunctional or polyfunctional monomers makes it possible for the embossed structure formed from the lacquer to have a higher hardness. By adding release additives, the precise separation of the embossed structure produced in the lacquer layer from the shape of the embossing tool, such as an embossing roller, and the precise separation of the construction device from the material surface structured by it can be optimized. By adding waxes as additives, it is possible to prevent non-ideal hardening of the lacquer layer surface, which is accompanied by permanent tackiness of the lacquer layer. The interaction of atmospheric oxygen with the applied lacquer layer can lead to non-ideal hardening and permanent tackiness. The addition of anti-settling agents makes it possible to prevent the settling of one or more specific components in the lacquer, so that the composition of the components, and in particular the hardness of the lacquer layer or embossed structure produced, is substantially uniform over the entire lacquer layer thickness. With regard to the addition of antifoams and / or substrate wetting agents in the lacquer composition and their effects, reference is made to the above explanations regarding the corresponding additives of the adhesion promoters, in order to avoid repetition.

[0045] According to another advantageous design of the method according to the application, the photoinitiator of the ultraviolet-hardening lacquer should be selected such that it is suitable for absorbing light having a wavelength in the range from 360 to 420 nm, preferably in the range from 390 to 400 nm. This embodiment of the application makes it possible to cure the lacquer layer having an embossed structure quickly and with high energy efficiency, so that a web-shaped construction device can be produced at high speed. In the production method according to the application, the production speed or web speed of the construction device can be in the range from, for example, 5 to 15 m / min.

[0046] According to another design variant of the method according to the application, the adhesion promoter or adhesion promoter layer and / or the lacquer used for the ultraviolet-hardening lacquer layer contains urethane acrylate, polyester acrylate, epoxy acrylate or a mixture of two or three of the acrylates mentioned as acrylic oligomers. These acrylates, in particular urethane acrylate, have the characteristics of high toughness, good adhesion and high wear resistance. The construction device produced according to the application thus has corresponding toughness and strength properties, which make it very robust when used multiple times. This design variant also contributes to an improved forming or embossing precision when structuring a relevant material surface, such as a laminate surface.

[0047] According to another advantageous design of the method according to the application, the ultraviolet-hardening lacquer layer is cured by means of at least one ultraviolet light-emitting diode radiator, wherein the ultraviolet radiation power is in the range from 8 to 16 W / cm2.2 Between 10 and 14 W / cm² is preferred. 2 Between. This design of the present invention makes it possible to manufacture the above-mentioned type of structural device in a highly energy-efficient and low-cost manner, requiring only relatively little equipment and technical resources.

[0048] Another advantageous design of the method according to the invention involves final curing of the UV-curable paint layer by at least one medium-pressure mercury vapor radiator or at least one UV-C radiator, preferably using 500 to 3000 mJ / cm². 2 The ultraviolet radiation dose is within the specified range. This design of the present invention makes it possible to produce the above-mentioned type of construction device at a high production rate. Here, during the forming process of the embossed structure, the ultraviolet-cured paint layer applied to the adsorbent layer is partially cured (pre-cured). Here, the paint layer is cured (partially cured) to such an extent that the composite material composed of the radial carrier material, adsorbent, and paint layer can be removed from the embossing tool, preferably an embossing roller with high forming accuracy, so that the embossed structure formed into the paint layer can be removed from the embossing tool with substantially no loss and stable shape. For example, in the first curing step, about 50% to 80% of the hardness required for complete curing can be achieved. Then, the composite material removed from the embossing tool is finally cured (post-cured) by at least one medium-pressure mercury vapor radiator or at least one ultraviolet-C radiator, and the ultraviolet radiation dose used is preferably between 500 and 3000 mJ / cm. 2 For example, 800 to 2800 mJ / cm 2 Especially 1000 to 2500 mJ / cm 2 Therefore, the curing (pre-curing) of the UV-cured paint layer applied to the adhesion promoter layer occurs when the paint layer comes into contact with the embossing tool, while the final curing (post-curing) of the paint layer occurs when the paint layer does not come into contact with the embossing tool.

[0049] If an embossing roller or similar device is used to form the embossed structure in the method according to the invention, the structure or composite material formed by the radial carrier material, the adsorbent layer and the paint layer is preferably guided around the embossing roller at an angle of about 60° to 200°, particularly preferably in the range of about 100° to 180°.

[0050] A further advantageous design of the method according to the application is characterized in that the embossed structure is formed in the UV-hardening lacquer layer in such a way that, after hardening of the lacquer layer, the average roughness depth Rz is between 40 and 200 μm, preferably between 100 and 200 μm, in accordance with the DIN EN ISO 4287 standard. By means of the correspondingly designed construction means, a three-dimensional surface structure can be produced on the surface of the embossable material, in particular of the resin-containing laminate, so that the surface concerned has the appearance of a natural material, for example the appearance of a wood grain with pores.

[0051] The application amount and the application weight of the UV-hardening lacquer layer depend, inter alia, on the average roughness depth Rz which is desired or should be achieved for the cured lacquer layer. In addition, it is also advantageous for economic reasons to limit the application amount and the application weight of the UV-hardening lacquer layer in order to avoid unnecessary material costs. According to the method according to the application, the application weight (application amount) of the UV-hardening lacquer layer is, for example, in the range from 10 to 250 g / m2, preferably in the range from 25 to 200 g / m2, particularly preferably in the range from 30 to 100 g / m2. 2 2 2

[0052] The average roughness depth Rz is the arithmetic mean of the individual roughness depths of five successive measurement paths in the roughness profile. The method for determining the average roughness depth Rz is as follows: one defined measurement path on the surface of the workpiece or the construction means is divided into seven individual measurement paths, the average measurement path being of equal size. The roughness depth Rz is determined only by these five measurement paths, since the Gaussian filter to be used requires a half measurement path before and after. The difference between the maximum and the minimum of the profile is determined for each individual measurement path. The average value is calculated from the five individual roughness depths obtained in this way.

[0053] The measurement of the roughness depth Rz is in accordance with the DIN EN ISO 4287 and DIN EN ISO 4288 standards. The measuring apparatus used for measuring the roughness depth Rz must be in accordance with the DIN EN ISO 3274 standard. The profile filter used must be in accordance with the DIN EN ISO 11562 standard.

[0054] ​​​A further subject of the invention is a construction device for structuring the surface of an embossable material, in particular the surface of a resin-containing laminate, in particular a construction device produced according to one of the above-mentioned design variants, having a web-shaped carrier material made of paper and / or plastic and a lacquer layer made of acrylic oligomers applied to the carrier material, the lacquer layer having a three-dimensional embossed structure, characterized in that the lacquer layer is connected to the carrier material by at least one adhesive layer consisting of acrylic oligomers, reactive diluents and photoinitiators that are reactive with ultraviolet radiation, wherein in the final state the average Martens hardness of the construction device is 10 to 80 N / mm 2 , preferably 30 to 80 N / mm 2 , wherein for measuring the Martens hardness a pressure head used as a test body is pressed into the surface of the lacquer layer having the embossed structure.

[0055] The construction device according to the invention has the advantages described above in connection with the method according to the invention for producing the construction device.

[0056] One advantageous design variant of the construction device according to the invention is characterized in that the adhesive layer contains 10 to 90% by weight, preferably 40 to 70% by weight, of acrylic oligomers, at least 8% by weight, preferably at least 20% by weight, of reactive diluents, 0.5 to 10% by weight of photoinitiators that are reactive with ultraviolet radiation, and 0.1 to 3% by weight of one or more additives from the group of defoamers and base material wetting agents, the sum of the weights of all components contained in the adhesive layer amounting to 100% by weight. A construction device of this design has a high mechanical and thermal resistance and can be used in heated printing machines, such as CPL double-belt printing machines.

[0057] According to a further design variant of the construction device, the lacquer layer having the embossed structure of the construction device has an average roughness depth Rz of 10 to 200 μm, preferably 40 to 200 μm, in particular preferably 100 to 200 μm, after curing according to the DIN EN ISO 4287 standard.

[0058] The lacquer layer is applied with a weight of, for example, 10 to 250 g / m 2 , preferably 25 to 200 g / m 2 , in particular preferably 30 to 100 g / m 2 .

[0059] If the web-shaped carrier material of the construction device according to the application is a plastic film web which is at least partially permeable to high-energy radiation, in particular to UV radiation, this construction device can also be used very well for the so-called CCI method for texturing a pressable lacquer surface. CCI is an abbreviation for Calander Coating Inert. The CCI method can be used to provide a lacquered material board, such as a medium-density fiberboard, a high-density fiberboard or a plastic board, with a high-gloss or a matt lacquer surface. In this method, the material surface, preferably a wooden material surface, is dried or hardened with UV light in a calendering machine after the application of a UV lacquer, through a transparent film. In the CCI method, the material surface is preferably first coated with a primer and then the UV lacquer is applied as a final lacquer. The material board with the liquid UV lacquer is directly fed into the calendering machine. There, the surface is hardened under inert conditions. In other words, the lacquered material board is "encapsulated dried" under a film. The construction device according to the application with a plastic film web which is at least partially permeable to UV radiation as a carrier material can be used as a film in this way. In this way, it is possible to produce material boards with a textured lacquer surface which meet the highest quality requirements. BRIEF DESCRIPTION OF DRAWINGS

[0060] The application is explained in more detail below with the aid of a schematic drawing which shows an embodiment.

[0061] The drawing shows schematically

[0062] Figure 1 a side view of a method and a device for producing a construction device for structuring a pressable material surface, in particular a resin-containing laminate surface; and

[0063] Figure 2 a side view of another embodiment of a method and a device for producing a construction device for structuring a pressable material surface, in particular a resin-containing laminate surface. DETAILED DESCRIPTION

[0064] Figure 1 A device 1 is shown schematically which can be used to carry out the method according to the application and on which the method according to the application is illustrated by way of example. By means of this device, a three-dimensional structure 2, in particular a copy of a wood grain, a natural stone, a mosaic pattern structure and / or a tile pattern structure, can be transferred from a corresponding master structure, for example in the form of an embossing roller 3, to a carrier material 5 which is coated with a UV-hardening lacquer 4.

[0065] The carrier material 5 is a web-shaped carrier material made of paper and / or plastic, which is at least partially permeable to high-energy radiation, in particular to UV radiation. The carrier material 5 is provided in the form of a wound roll 6. For example, a UV radiation-permeable film made of polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polycarbonate (PC), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC) or another UV radiation-permeable plastic can be used as the carrier material 5. The film can also be referred to as a transparent film. For example, the film has a thickness of between 50 and 200 pm, preferably between 75 and 125 pm, particularly preferably between 100 and 125 pm. Alternatively, a transparent paper permeable to UV radiation can also be used as the web-shaped carrier material 5. For example, the paper has a grammage of between 80 and 180 g / m2, preferably between 150 and 170 g / m2. 2 2

[0066] A UV-hardening lacquer layer 7 consisting of an acrylic oligomer is applied to the carrier material 5, and a three-dimensional embossed structure is then formed in the lacquer layer. According to the application, at least a layer of an adhesion promoter 8 consisting of an acrylic oligomer, a reactive diluent and a photoinitiator which is reactive with UV radiation is applied to the carrier material 5 before the UV-hardening lacquer layer 7 is applied.

[0067] For example, the adhesion promoter layer 8 contains 10 to 90% by weight, preferably 40 to 70% by weight, of an acrylic oligomer, at least 8% by weight, preferably at least 20% by weight, of a reactive diluent and 0.5 to 10% by weight, preferably 0.5 to 5% by weight, of a photoinitiator which is reactive with UV radiation.

[0068] According to one preferred design, the adhesion promoter for the adhesion promoter layer 8 or the adhesion promoter layer formed therefrom can have the following composition:

[0069] 60 to 90% by weight of Ebercryl 4265 from Allnex (acrylic oligomer or similar polyurethane acrylate),

[0070] 10 to 30% by weight of triethylene glycol divinyl ether (such as Ashland Rapidure DVE-3 or a similar monomer),

[0071] 5 to 10% by weight of methyl formate (MBF or a similar UV-reactive photoinitiator) and

[0072] 0.1 to 3% by weight of one or more additives, including defoamers and substrate wetting agents, the sum of the weights of all components in the adhesion promoter layer amounting to 100%.

[0073] ​​For example, the photoinitiator is adapted to absorb light having a wavelength of between 250 and 350 nm, preferably between 270 and 330 nm. The adhesion promoter is applied to the web-shaped carrier material 5, for example, by means of an engraved or rubberized application roller 9.

[0074] If a transparent paper which is permeable to ultraviolet radiation is used as the carrier material 5, the adhesion promoter is preferably applied to the paper web in the form of an aqueous solution to form the adhesion promoter layer 8, and the adhesion promoter layer 8 is thermally dried before the ultraviolet-hardening lacquer layer 7 is applied. The drying can be carried out, for example, by means of a radiation heater device 10 which faces the adhesion promoter layer 8. Alternatively or additionally, a thermal drying device, for example a radiation heater device (not shown), can also be arranged on the side (bottom or back side) 11 of the paper web 5 which faces away from the adhesion promoter layer 8.

[0075] The amount of application of the aqueous adhesion promoter is adjusted such that the layer thickness of the adhesion promoter layer 8 in the dry state is in the range from 0.5 to 12 μm, preferably in the range from 1 to 10 μm, particularly preferably in the range from 2 to 5 μm. In other words, the amount of application of the aqueous adhesion promoter on the paper web is adjusted, for example, such that the grammage of the adhesion promoter layer 8 in the dry state is in the range from about 1 to 15 g / m 2 , preferably in the range from about 4 to 7 g / m 2 . The drying of the adhesion promoter layer 8 is carried out, for example, at a temperature in the range from 80°C to 160°C, preferably from 90°C to 140°C, in particular from 100°C to 120°C.

[0076] If a plastic film web which is permeable to ultraviolet radiation is used instead of a paper web, the adhesion promoter is preferably applied to the plastic film web in the form of a non-aqueous solution to form the adhesion promoter layer 8, and the adhesion promoter layer 8 is hardened by ultraviolet radiation until the surface of the adhesion promoter layer 8 is solid and / or substantially tack-free before the ultraviolet-hardening lacquer layer 7 is applied.

[0077] The at least partial hardening of the adhesion promoter layer 8 can be carried out, for example, by means of one or more ultraviolet radiation devices 12, preferably one or more ultraviolet LEDs, which face the adhesion promoter layer and / or are arranged on the side (bottom or back side) 11 of the web-shaped plastic film which faces away. The adhesion promoter layer 8 is hardened, for example, with an ultraviolet radiation dose of from 60 to 200 mJ / cm 2 , preferably from 100 to 160 mJ / cm 2 .

[0078] Furthermore, the at least partial hardening of the adhesion promoter layer 8 by a combination of thermal drying and radiation hardening also lies within the scope of the application, as described above.

[0079] The application amount of the non-aqueous adhesion promoter is adjusted such that the layer thickness of the adhesion promoter layer 8 formed thereby in the dry state is in the range of 0.5 to 12 μm, preferably in the range of 1 to 10 μm, particularly preferably in the range of 2 to 5 μm. In other words, the application amount of the non-aqueous adhesion promoter on the plastic film web can be adjusted, for example, such that the grammage of the adhesion promoter layer 8 in the dry state is in the range of about 0.3 to 15 g / m2, preferably in the range of about 1 to 5 g / m2. 2 2

[0080] After the adhesion promoter layer 8 has at least partially dried or at least partially hardened, an ultraviolet-curable lacquer consisting of an acrylic oligomer is applied thereon in order to subsequently form the three-dimensional embossed structure 13.

[0081] For the ultraviolet-curable lacquer layer 7, a structural lacquer is preferably used which contains the following components:

[0082] 30 to 95 % by weight of an acrylic oligomer,

[0083] 10 to 70 % by weight of a monofunctional or polyfunctional monomer,

[0084] 1 to 5 % by weight of a photoinitiator, and optionally

[0085] 1 to 6 % by weight of one or more additives, including antifoams, substrate wetting agents, release additives, waxes and anti-settling agents, the sum of the weights of all components contained in the ultraviolet-curable lacquer amounting to 100 %. The photoinitiator of the ultraviolet-curable lacquer is adapted to absorb light having a wavelength of between 360 and 420 nm, preferably between 390 and 400 nm.

[0086] The ultraviolet-curable lacquer layer can be applied by means of a roller or blade application device, preferably a comma bar (Comma bar) application device 14. The comma bar application device 14 has a special blade which is composed of a roller on which a groove 14.1 of approximately 90° is machined. This groove 14.1 makes the strip-shaped blade look like a comma in a side view (cross-sectional view). The comma bar or the outlet limited by the comma bar and the associated lacquer cartridge can be adjusted by changing the horizontal and vertical position and by changing the angle of rotation. Due to the roundness of the blade geometry, the shear forces acting on the ultraviolet-curable lacquer are lower than with conventional blades. The comma bar system has advantages when applying dilute, viscoelastic UV lacquers. The possible variations in application weight and viscosity are particularly great when using the comma bar system.

[0087] ​​The UV-curing lacquer layer is in a flowable state when it comes into contact with the embossing roller 3 or the other main structure at relatively low pressure, so that the UV-curing lacquer can reach into the recesses of the outer surface of the embossing roller 3. The composite material consisting of the carrier material 5, the adhesion promoter layer 8 and the lacquer layer 7 is guided around the embossing roller (main structure) 3 with a well-defined wrap angle (see Figure 1 ). The wrap angle can be, for example, between 60° and 200°, preferably between 100° and 180°.

[0088] The lacquer layer 7 is cured when it comes into contact with the embossing roller (main structure) 3, i.e. during the formation of the embossing structure 13, by irradiation with high-energy radiation, preferably UV radiation, preferably from the side of the radiation- permeable, web-shaped carrier material 5 that is remote from the embossing structure 13. The irradiation device for this purpose is denoted by 15 in Figure 1 . In addition to the irradiation from below in the region of the embossing roller 3, the lacquer layer located in the region of the embossing roller 3 can also be irradiated from at least one side of the embossing roller 3.

[0089] Preferably, at least one LED radiator emitting UV radiation is used as the irradiation device 15. The irradiation device 15 cures the lacquer layer 7 by emitting a UV radiation power of 8 to 16 W / cm 2 , preferably 10 to 14 W / cm 2 , for example approximately 12 W / cm 2 .

[0090] The lacquer layer 7 is cured to a certain extent (partially cured) when it comes into contact with the embossing roller (main structure) 3, so that the composite material consisting of the web-shaped carrier material 5, the adhesion promoter layer 8 and the lacquer layer 7 can be peeled off the embossing roller 3 with high forming accuracy. In particular, the embossing structure 13 formed in the lacquer layer can be removed from the embossing roller 3 substantially without loss of depth and with a stable shape after this curing. Subsequently, the lacquer layer 7 and the adhesion promoter layer 8 located thereunder are post-cured (final curing) by at least one medium-pressure mercury vapor emitter 16 or at least one UV-C emitter, the post-curing or final curing preferably being carried out in the range of a UV radiation dose of 500 to 3000 mJ / cm 2 . The post-curing or final curing of the construction device 17 is carried out, for example, by a specific area power of approximately 200 W / cm 2 .

[0091] After the final post-curing (final curing), the embossing structure 13 of the construction device 17 produced in this way has an average roughness depth Rz in the range of 10 to 200 μm, preferably in the range of 40 to 200 μm, particularly preferably in the range of 100 to 200 μm, according to DIN EN ISO 4287.

[0092] At the end of the equipment 1 used to perform the production method of the present invention, the completed construction device 17 is wound up.

[0093] Figure 2 The illustrated embodiments and Figure 1 The disclosed embodiments differ in that the embossing roller 3' is a hollow roller with a transmissive or transparent roller shell, and at least one radiating device 15 is arranged inside the embossing roller 3' and points to the contact area where the ultraviolet-cured paint layer 7 contacts the embossing roller 3'.

[0094] The following are examples and comparative examples of the adhesitant compositions used in the methods or corresponding tests of the present invention, as well as radiation-cured varnish (cap coat) used to form the embossed structure 13 of the constructing device 17. In particular, average values ​​of martensitic hardness measured in laboratory tests and measurements of the roughness depth Rz of certain radial carrier materials are also provided. Furthermore, measurement results of cross-cut tests are provided.

[0095] Adhesives used in the testing of the method of this invention:

[0096]

[0097] The radiation-curable capping varnish used in the experiments according to the method of the present invention:

[0098] The martensitic hardness of the structural device and the comparative material produced according to the present invention:

[0099]

[0100] The martensitic hardness in Examples 1 to 10 listed above was measured using a Helmut Fischer FISCHERSCOPEH M2000S measuring instrument according to DIN EN ISO 14577, with a test range of 300 mN / 20s. To illustrate the effect of carrier material 5 on the measured surface hardness of the structural device 17, the carrier material (a Mitsubishi PET film) was also measured separately. The Marlowan hardness of the paint (or paper) was measured without the admixture and topcoat (see Examples 1 and 8). Additionally, the Marlowan hardness of a radiation-curable paint was measured separately for comparison, by separating the paint (i.e., topcoat C) from a previously untreated film (without the primer (admixture)) and then measuring it separately (see Example 10).

[0101] By means of a scribe test on the construction devices 17 of the above Examples 2, 3, 4 and 6, the adhesion of the lacquer layers was determined, and in each case a characteristic value Gt of 0 was obtained. This means that in these examples no peeling or significant damage (detachment) of the respective lacquer layers of the construction devices 17 was detected. In Examples 5 and 7, the characteristic values Gt of the scribe test were 2 and 1, respectively. However, these Gt values are also good characteristic values, since a generally average characteristic value Gt of at least 3.5 is still classified as an adequate adhesion value.

[0102] In a comparative test, the above-mentioned UV-hardening lacquer layers of the top lacquers A, B or C were applied directly on a plastic film (75 μm PET film from Mitsubishi ), i.e. without using any of the above-mentioned adhesion promoters V1, V2 or V2B, and in each case a Gt value of 5 in the scribe test was obtained, which shows a very high degree of detachment.

[0103] In order to assess the forming accuracy of the embossing structure 13 of the construction device 17 produced according to the application, the average roughness depth Rz was measured according to DIN EN ISO 4287 and compared with the average roughness depth Rz of the embossing rollers 3 used. One of these embossing rollers had a wood grain structure as the main structure, and the other embossing structure had a large number of negative pyramids as the main structure.

[0104]

[0105] From the above-mentioned average roughness depth Rz values, it can be seen that the embossing structure of the construction device produced according to the application has a very high forming accuracy. It can also be determined from the microscope images that, by means of the method according to the application, the main structure of the embossing roller 3 is reproduced true to scale in the embossing structure 13 of the radiation-hardening top lacquer of the construction device 17.

[0106] The implementation of the application is not limited to the embodiments shown in the drawings. Rather, a variety of variants can be envisaged, i.e. the application disclosed in the claims is used even if the design differs from the examples. For example, the adhesion promoter layer 8 can be thermally dried or cured only from one side, for example from the top of the adhesion promoter layer 8, and subsequently the UV-hardening lacquer layer 7 is applied. Furthermore, a plurality of radiation devices, preferably LED radiators emitting ultraviolet light, can be provided for the hardening of the lacquer layer 7, which are arranged on the outside and on the inside of the embossing roller 3 having a transparent roller shell.

Claims

1. A method for producing a structural device (17) for structuring the surface of an embossed material, comprising the following steps: Provide a web-shaped carrier material (5) made of paper and / or plastic, and apply a UV-curable varnish layer (7) made of acrylic oligomers onto the carrier material. A three-dimensional embossed structure (13) is formed in the paint layer (7) applied to the carrier material (5), and During the molding process of the embossed structure (13), the paint layer (7) is cured by high-energy radiation. The feature is that, prior to applying the UV-curable paint layer (7), at least one layer of adhesion promoter (8) consisting of acrylic oligomers, reactive diluents, and photoinitiators capable of reacting with high-energy radiation is applied to the carrier material, and the paint layer (7) having an embossed structure (13) is cured by high-energy radiation, such that, in the final state, the average martensitic hardness of the construction device (17) is 10 to 80 N / mm according to DIN EN ISO 14577. 2 The indenter used to measure martensitic hardness is pressed into the surface of the paint layer (7) with embossed structure (13).

2. The method according to claim 1, characterized in that, The surface of the embossed material is a resin-containing laminate surface.

3. The method according to claim 1, characterized in that, In its final state, the average martensitic hardness of the construction device (17) is 30 to 80 N / mm. 2 .

4. The method according to claim 1, characterized in that, At least one adhesive layer (8) is applied to the carrier material (5), and the thickness of the adhesive layer (8) is between 0.5 and 12 μm, depending on the dry state of the adhesive layer (8).

5. The method according to claim 4, characterized in that, The thickness of the adhesive layer (8) applied to the carrier material (5) is between 1 and 10 μm.

6. The method according to claim 5, characterized in that, The thickness of the adhesive layer (8) applied to the carrier material (5) is between 2 and 5 μm.

7. The method according to claim 1, characterized in that, A radial carrier material (5) made of paper and / or plastic that is at least partially permeable to high-energy radiation is used as the radial carrier material (5), wherein the curing of the paint layer (7) is carried out by high-energy radiation during the molding process of the embossed structure (13), such that the irradiation is carried out at least partially from the side of the carrier material (5) away from the embossed structure (13).

8. The method according to claim 1, characterized in that, A web of paper is used as a web-shaped carrier material (5), wherein an aqueous adhesive is applied to the carrier material (5) to produce an adhesive layer (8), wherein the adhesive layer (8) is dried at least in the surface area before an ultraviolet-curable paint layer (7) is applied thereon, and wherein the drying is carried out at a temperature between 80°C and 160°C.

9. The method according to claim 8, characterized in that, Drying is carried out at a temperature between 90°C and 140°C.

10. The method according to claim 9, characterized in that, Drying is carried out at a temperature between 100°C and 120°C.

11. The method according to claim 1, characterized in that, A plastic film is used as the carrier material in a sectional form (5), wherein the adhesive layer (8) is cured to a certain extent by high-energy radiation before the UV-curable paint layer (7) is applied to the adhesive layer (8), such that the surface of the adhesive layer is cured and / or substantially no longer tacky, wherein the photoinitiator of the adhesive layer (8) is suitable for absorbing light in the wavelength range of 250 to 350 nm, wherein the adhesive layer (8) has an absorption capacity of 60 to 200 mJ / cm 2 Hardening is performed within the range of ultraviolet radiation doses.

12. The method according to claim 11, characterized in that, The photoinitiator of the adsorbent layer (8) is suitable for absorbing light in the wavelength range of 270 to 330 nm.

13. The method according to claim 11, characterized in that, Adhesive layer (8) at 100 to 160 mJ / cm 2 Hardening is performed within the range of ultraviolet radiation doses.

14. The method according to claim 1, characterized in that, The adhesive layer (8) contains 10 to 90% by weight of acrylic oligomers, At least 8% by weight of active diluent, 0.5 to 10% by weight of a photoinitiator capable of reacting with ultraviolet radiation, and Selectively 0.1 to 3% by weight of one or more additives, including defoamers and substrate wetting agents, wherein the total weight of all components contained in the adhesion promoter layer is 100% by weight.

15. The method according to claim 14, characterized in that, The adhesive layer (8) contains 40 to 70% by weight of acrylic oligomer.

16. The method according to claim 14, characterized in that, The adsorbent layer (8) contains at least 20% by weight of an active diluent.

17. The method according to claim 1, characterized in that, The paint used in the UV-curable paint layer (7) contains... 30 to 95% by weight of acrylic oligomers, 10 to 70% by weight of monofunctional or polyfunctional monomers, 1 to 5% by weight of photoinitiator, and selective One or more additives, ranging from 1 to 6% by weight, including defoamers, substrate wetting agents, release agents, waxes, and antisettling agents, wherein the sum of all components contained in the UV-curable paint is 100% by weight.

18. The method according to claim 1, characterized in that, The adhesive layer (8) and / or the paint used for the UV-curable paint layer (7) contain urethane acrylate, polyester acrylate, epoxy acrylate or a mixture of two or three of the above acrylates as acrylic oligomers.

19. The method according to claim 1, characterized in that, The UV-curable paint layer (7) is cured by at least one UV-emitting diode radiator with a UV radiation power of 8 to 16 W / cm². 2 between.

20. The method according to claim 19, characterized in that, At least one light-emitting diode radiator emits ultraviolet light with an ultraviolet radiation power of 10 to 14 W / cm². 2 between.

21. The method according to claim 1, characterized in that, The paint layer capable of UV curing is ultimately cured by at least one mercury vapor medium-pressure radiator or at least one ultraviolet-C radiator.

22. The method according to claim 21, characterized in that, Final hardening uses 500 to 3000 mJ / cm 2 Ultraviolet radiation dose within the range.

23. The method according to claim 1, characterized in that, Photoinitiators for UV-curable paints are suitable for absorbing light in the wavelength range of 360 to 420 nm.

24. The method according to claim 23, characterized in that, Photoinitiators for UV-curable paints are suitable for absorbing light in the wavelength range of 390 to 400 nm.

25. The method according to claim 1, characterized in that, The embossed structure (13) is formed in a UV-curable paint layer (7) such that, after the paint layer (7) has cured, the average roughness depth Rz of the embossed structure (13) is between 10 and 200 μm, according to DIN EN ISO 4287.

26. The method according to claim 25, characterized in that, After the paint layer (7) has hardened, the average roughness depth Rz of the embossed structure (13) is between 40 and 200 μm.

27. The method according to claim 26, characterized in that, After the paint layer (7) has hardened, the average roughness depth Rz of the embossed structure (13) is between 100 and 200 μm.

28. The method according to claim 1, characterized in that, Embossing structures (13) are formed using embossing rollers (3, 3'), and composite materials formed from a radial carrier material (5), an adhesive layer (8), and a paint layer (7) are guided around the embossing rollers (3, 3') with an embossing angle ranging from 60° to 200°.

29. The method according to claim 28, characterized in that, The surrounding angle ranges from 100° to 180°.

30. The method according to any one of claims 1 to 29, characterized in that, The high-energy radiation mentioned is ultraviolet radiation.

31. A constructing device (17) produced according to the method of claim 1 for structuring the surface of an embossed material, comprising a web-shaped carrier material (5) made of paper and / or plastic and a lacquer layer (7) made of acrylic oligomers applied to the carrier material (5), the lacquer layer having a three-dimensional embossed structure (13), characterized in that, The paint layer (7) is bonded to the carrier material (5) by at least one adhesive layer (8), which consists of acrylic oligomers, reactive diluents, and photoinitiators that can react with ultraviolet radiation. In the final state, the average martensitic hardness of the construction device (17) is 10 to 80 N / mm according to DIN EN ISO 14577. 2 The indenter used to measure martensitic hardness is pressed into the surface of the paint layer (7) with embossed structure (13).

32. The structural device (17) according to claim 31, characterized in that, The surface of the embossed material is a resin-containing laminate surface.

33. The structural device (17) according to claim 31, characterized in that, In the final state, the average martensitic hardness of the construction device (17) is 30 to 80 N / mm2.

34. The structural device (17) according to claim 31, characterized in that, After curing, the paint layer (7) with embossed structure (13) has an average roughness depth Rz between 10 and 200 μm according to DIN ENISO 4287 standard.

35. The structural device (17) according to claim 34, characterized in that, After hardening, the paint layer (57) with embossed structure (13) has an average roughness depth Rz between 40 and 200 μm.

36. The structural device (17) according to claim 35, characterized in that, After hardening, the paint layer (57) with embossed structure (13) has an average roughness depth Rz between 100 and 200 μm.

Images