Apparatus and method for the surface modification of a carrier

Abstract

The invention relates to a method and an apparatus for the surface modification of a carrier. In the method, a carrier is introduced into a conveying device of the apparatus at an input position, a radiation-curable fluid is applied to a surface of the carrier by means of a first application device, the radiation-curable fluid is pre-treated by means of a pre-treatment device taking into account an optical pattern, the carrier is irradiated substantially over the entire surface by means of a light source, in particular an LED, laser, or excimer, and the radiation-curable fluid is cured by means of at least one first curing device such that a surface topology of the carrier corresponds to the optical pattern.

Description

Device and method for surface modification of a carrier

[0001] The invention relates to a device and a method for surface modification of a carrier.

[0002] Devices and methods are known in the prior art which manipulate a surface, in particular a surface, in such a way that the haptics, function and / or visual appearance of the surface is altered in a predefined manner. Within the scope of functional manipulation, for example, the roughness of a surface can be increased; within the scope of haptic manipulation, for example, a topology can be manipulated in such a way that a user experiences a different touch sensation; and within the scope of optical manipulation, for example, the surface can be modified such that light reflection is increased, reduced, or made more diffuse.

[0003] One objective of surface manipulation, especially in the design of everyday objects, is to create a natural appearance for an essentially artificial surface. A natural appearance results at least from a visual perception of the surface by an observer and a sensation when touching the surface, for example, with the palm of a hand.

[0004] In the state of the art, mechanical removal processes are used, for example, to create a wood grain on to replicate a lacquer layer on an object. Chemical etching processes are also known as removal methods.

[0005] EP 2 418 019 A1 discloses a method for partially matting UV lacquer layers. The method comprises applying a UV lacquer layer to a carrier substrate and subsequently treating it with an excimer radiator. The excimer radiator is situated within a stencil having regions that are transparent to the excimer radiation and regions that are opaque to the excimer radiation, and the UV lacquer layer is partially exposed through the stencil with the excimer radiator.

[0006] A process for producing matt and scratch-resistant coatings which takes place under the action of actinic radiation on coating systems containing double bonds by radical polymerization is disclosed in EP 2 794 126 B1.

[0007] EP 3 453 463 A1 discloses a method for adjusting the amplitude and frequency of microfolding during the photochemical matting of radiation-curable coatings.

[0008] A method for producing an embossed surface on a building board is disclosed in EP 3 626 478 A1. The method comprises providing a substrate and producing a color matrix by applying a color to an upper part of the substrate, forming a cavity in a surface layer of the building board by pressing a lower part of the substrate and the embossed surface located on the upper part of the substrate Color matrix against the surface layer of the building board, thereby forming an embossed surface of the building board and removing the substrate with the color matrix from the embossed surface.

[0009] The current methods and devices do not allow for the efficient production of a spatially resolved matte and / or glossy pattern. The use of stencils offers only very limited design variations, which at least hampers the creation of a natural impression.

[0010] Furthermore, the current technology only allows very simple structures to be introduced into a surface layer. The creation of intermediate stages and thus a complex topology is not possible with the known methods and devices.

[0011] Thus, in the prior art, no synchronous structures can be produced on a surface of a carrier which correspond to a pattern of the carrier, a pattern applied to the carrier and / or a pattern to be applied to the carrier.

[0012] The object of the invention is to improve the state of the art.

[0013] The object is achieved by a method for surface modification of a carrier. In the method, a carrier is introduced into a conveyor device of the device at an input position, a radiation-curable fluid is introduced by means of a first Application device applied to a surface of the carrier, the radiation-curable fluid pretreated by means of a pretreatment device taking into account an optical pattern, the carrier is irradiated essentially over its entire area by means of an excimer and the radiation-curable fluid cured by means of at least one first curing device so that a surface topology of the carrier corresponds to the optical pattern.

[0014] By means of the method according to the invention, spatially resolved matt and / or gloss patterns can advantageously be produced in a manner suitable for mass production, which contribute to the creation of a natural impression.

[0015] In addition, such complex structures can be introduced into a surface layer that resemble a natural topology. Complex topologies can be easily produced using differentiated pretreatment.

[0016] In this way, it is possible to produce a synchronous structure on the surface of the carrier based on an ad-hock determined optical pattern of the surface of the carrier or by means of predefined optical pattern data, which corresponds to an optical pattern of the carrier, a pattern applied to the carrier, a predefined pattern and / or a pattern to be applied to the carrier.

[0017] An essential idea of the invention is that, taking into account a respective local optical appearance of an object a Surface topology of the object is realized in a flow production.

[0018] The following terms are explained:

[0019] “Insertion” is understood in particular to mean the insertion of the carrier into a device. The insertion can be carried out manually or automatically. Additionally or alternatively, carriers can be stored prior to insertion and inserted into the device by a semi-automatic system. In this case, the insertion takes place in particular taking into account a predefined orientation of the carrier, whereby in particular a surface of the carrier to be treated is in a predefined orientation, such as top side up and insertion direction along a long edge, with respect to the device.

[0020] Insertion takes place, in particular, at an input position of the device. This can be characterized, in particular, by a housing of the device having an opening and / or by a conveyor device of the device being accessible at the input position. This advantageously ensures secure insertion of the carrier.

[0021] At least the implementation of the process steps of application, pretreatment and irradiation takes place in particular at processing stations assigned to the device and / or processing areas assigned to the device. Additionally or alternatively, the curing can be carried out at least partially at a the device and / or in a processing area assigned to the device. Alternatively, curing can start at a corresponding processing station and / or a corresponding processing area and continue after the carrier has been manually or automatically removed from the device at the dispensing position and / or be completed after the carrier has been manually or automatically removed from the device at the dispensing position.

[0022] The processing stations and / or areas are arranged, particularly upstream, essentially in a predefined sequence. Starting from the input position to the output position, the sequence of the processing stations and / or areas is, in particular: application, pretreatment, irradiation, and curing, whereby curing can occur in addition to or as an alternative to irradiation.

[0023] Within the scope of the surface treatment of the carrier, the aforementioned processing stations and / or areas can be passed through several times by a carrier or can be arranged repeatedly in order to advantageously realize a higher gradual gradation of a surface topology.

[0024] A carrier is at a time particularly partially present in the working area of a processing station and / or a processing area. Additionally or alternatively, a first area of the carrier can be in the working area of a first processing station and / or a first processing area and at least a second area of the same carrier in the working area of a second processing station and / or a second processing area. Finally, different carriers, in particular positioned parallel to one another, can be present simultaneously in one and the same processing station and / or the same processing area.

[0025] A first processing station and / or a first processing area can at least partially spatially cover a second processing station and / or a second processing area, can be directly connected to the second processing station and / or the second processing area and / or can be at a distance from the second processing station and / or the second processing area.

[0026] The transport of the carriers between the processing stations and / or processing areas and / or within the processing stations and / or processing areas is realized in particular by means of the conveyor device. The process steps of application, pretreatment, irradiation, and possibly curing are thus carried out particularly during the transport of the carrier through the device.

[0027] The conveyor device is designed in particular for the secure reception and transport of the carrier and / or a plurality of carriers simultaneously. "Secured" is understood in particular to mean that a position of a The length of the picked-up carrier relative to the contact area of the conveyor device essentially remains unchanged, i.e., in particular, there is little to no slippage, so that a position of a specific carrier within the device can advantageously be derived from a movement of the conveyor device. The length of a carrier may exceed the length of the conveyor device, particularly if the carrier is "web-shaped."

[0028] The conveyor device can be a roller conveyor, a belt conveyor, a carousel, and / or a segment conveyor, and / or can convey a particularly web-shaped carrier according to the roll-to-roll principle. Advantageously, the conveyor device enables a predefinable and / or adjustable transport speed of the carriers along the "processing stations" within the device.

[0029] The conveying device conveys in particular continuously and / or discontinuously. The conveying speed can be 1 m / min to 250 m / min, in particular 3 - 10 m / min. The conveying speed can correlate to a process duration of the individual process stations of the device. Additionally or alternatively, the conveying speed can be adjustable and / or can be assigned to a predefined Follow speed profile .

[0030] A "carrier" is understood to be an essentially flat, web-shaped and / or piece goods-like object. A longitudinal extension of the carrier is in particular greater as a transverse extension of a carrier and a thickness of the carrier. A carrier, in particular, has a top side and a bottom side. The area of the carrier to be treated is also referred to as the surface of the carrier. The thickness of the carrier can be 10 gm to 100 mm, in particular 50 gm to 23 mm.

[0031] The substrate can be made of wood, ceramic, metal, paper, and / or plastic, and can be in particular a solid material, composite material, woven fabric, or nonwoven. A substrate can be surface-treated, coated, laminated, for example, with plastics, and / or painted. The substrate can have an optical pattern and / or be plain-colored.

[0032] "Applying" is understood in particular to mean the application of the radiation-curable fluid to a surface of the carrier. The application is carried out in particular by means of a first application device. A "first application device" is understood in particular to mean an applicator for a particularly radiation-curing fluid, which applies the radiation-curing fluid essentially over the entire surface of a predefined area of the carrier. Additionally or alternatively, at least one second application device can be used.

[0033] In other words, the radiation-curable fluid is applied to the carrier in a continuous process by the first and / or second application device in cooperation with the conveying device of the device.

[0034] The first and / or second application device can be a roller applicator, a pressure applicator, a pouring applicator, an inkjet, also called an inkjet applicator, and / or a spray applicator and produces a layer of radiation-curable fluid with, advantageously, a particularly uniform layer thickness and / or a predefined surface structure on the carrier. A layer thickness of the radiation-curing fluid can decrease in an edge region of the carrier so that the radiation-curing fluid does not flow off the carrier.

[0035] The “radiation-curable fluid”, also called fluid, is in particular a photopolymerizable coating agent. The radiation-curable fluid is applied in particular over the entire surface of the carrier, i.e. covering the entire surface of the carrier, in a layer with a layer thickness of at least 3 μm by means of the first application device and / or second application device. The application can be successive, which in particular does not mean application over the entire surface at the same time, but rather application starting from a starting point. The radiation-curable fluid can comprise acrylates, epoxies, vinyl ethers, composite systems and / or other curable components.

[0036] "Pretreatment" is understood to mean, in particular, an action on the radiation-curable fluid applied to the surface of the carrier, in particular by means of a "pretreatment device". During the pretreatment, the carrier can be treated in particular with at a speed of 1 - 250 m / min, preferably 3 - 50 m / min. Pretreatment is generally not carried out across the entire surface of the carrier, but rather by taking an "optical pattern" into account. In other words, the areas to be pretreated are derived, in particular, from the optical pattern. This advantageously allows for structured pretreatment of the carrier.

[0037] The "optical pattern", also called pattern, can already be applied to the carrier to be pretreated, already present on the carrier and / or predefined. The optical pattern is in particular visually perceptible.

[0038] An already applied optical pattern can be applied to the substrate by means of printing processes, and an already existing optical pattern can be material-related. To derive the areas to be pretreated on the substrate, taking into account an already applied or existing optical pattern, the already applied or existing optical pattern can be determined, in particular using a sensor, and the sensor information can be transmitted via data technology to a control device of the pretreatment device.

[0039] A predefined optical pattern can be stored in a memory associated with the device and can be transmitted in data terms to a control device of the Pre-treatment facility, which The areas to be pretreated are determined based on the data and the pretreatment device is controlled accordingly. The pattern can be created artificially, in particular using a drawing program and / or taken from a natural object, so that the pattern essentially resembles a pattern of a natural material. A natural material is understood to mean, in particular, wood and / or natural stone. A predefined pattern can be applied to the carrier additionally or alternatively after the surface treatment.

[0040] Taking the optical pattern into account during the pretreatment of the substrate, a partial exposure to the radiation-curable fluid is advantageously achieved. The exposure duration and / or intensity can influence the pretreatment in such a way that a complex topology is advantageously realized in a single pretreatment step.

[0041] In one embodiment, the pretreatment comprises partial polymerization, also called partial pregelation, of the radiation-curable fluid in regions predefined by the optical pattern. The pregelation is realized, in particular, by means of an initiator as a pretreatment device, which stimulates a curing reaction of the radiation-curable fluid in a region of the radiation-curable fluid treated by the pretreatment device. The initiator can be a light source, in particular an LED, laser, or PAG.

[0042] In one embodiment, the pretreatment device may comprise a laser. In other words, according to this embodiment, a laser beam emitted by the laser onto the radiation-curable fluid is the initiator. Using a laser, the pretreatment device emits, in particular, a laser beam with a wavelength of 200 nm to 400 nm, in particular 395 nm.

[0043] In one embodiment, irradiation of a predefined position on the surface of the carrier with a laser beam can be achieved using a guide device on which the laser is arranged and which positions the laser in a working range of the pretreatment device relative to the carrier. By means of a pretreatment device having at least one laser, a first region of the radiation-curable fluid can advantageously be pre-gelled in a predefined region, whereas a second region of the radiation-curable fluid in the predefined region is not pre-gelled. The coating irradiated with the laser is finally irradiated in particular with UV light having wavelengths from > 200 nm to < 420 nm, preferably from > 280 nm to < 420 nm, at a radiation dose of 25 to 120 mJ / cm2, preferably from 30 to 100 mJ / cm2.

[0044] In an alternative embodiment, the pretreatment device comprises at least one illuminant, in particular PAG, and a template, wherein the template corresponds to the optical pattern. The illuminant carries out a pretreatment, in particular a pre-gelling, of the irradiated regions of the radiation-curable fluid. The stencil is arranged in particular between the illuminant and the surface of the carrier to be pretreated. In other words, the illuminant is the initiator. Thus, the radiation-curable fluid applied to the surface of the carrier (105) is partially pre-gelled by means of the illuminant in the regions not covered by the stencil, so that the treated regions advantageously correspond to the optical pattern. The coating irradiated with the illuminant is finally irradiated in particular with short-wave, monochromatic radiation from a low-pressure mercury lamp with emission lines at 185 and 254 nm and doses of 15 to 600 mJ / cm2.

[0045] The total dose of irradiation during pretreatment is in particular 15 - 300 mJ / cm2 and depends on the reactivity of the radiation-curable fluid and the desired result.

[0046] In one embodiment, a further layer of a radiation-curable fluid or the radiation-curable fluid can be applied to the surface of the carrier by means of a second application device, which can correspond to the first application device, in particular if the conveying device is additionally or alternatively configured to transport carriers additionally upstream. The second application can thus take place before the pretreatment or after the pretreatment of the first layer of the radiation-curable fluid. In particular, when applying the further layer of the radiation-curable fluid after pretreating the initially applied layer of the radiation-curable fluid, a second pretreatment of the carrier can additionally or alternatively be carried out. Additional or alternatively, further layers of the or a radiation-curable fluid can be applied to the carrier. By applying and specifically pretreating a large number of layers of the or a radiation-curable fluid, a particularly multi-layered surface topology of the carrier can advantageously be realized. In addition, the at least one layer of the radiation-curable fluid can function as a protective layer of the carrier.

[0047] Pretreatment in a reduced oxygen atmosphere advantageously reduces process time and allows for optimal predefined parameterization of the pretreatment device. Typical oxygen concentrations in a reduced oxygen atmosphere are below 1%. Performing the treatment in air is also possible at high radiation doses (close to 300 mJ / cm2).

[0048] Additionally or additionally, at least one basic pretreatment device can be arranged downstream of the pretreatment device and / or after the pretreatment device, which in particular realizes a full-surface pregelation of the radiation-curable fluid present on the surface of the carrier. By arranging the at least one basic pretreatment device, the power of the pretreatment device can advantageously be reduced. The basic pretreatment device can in particular have a laser or a light source as an initiator.

[0049] "Irradiation" is understood in particular to mean the action on the, in particular, pretreated surface of the carrier by means of a light source, in particular LED, laser and / or excimer. By means of irradiation, the coating, in particular the radiation-curable fluid, is in particular microstructured. The irradiation is carried out in particular over the entire surface of the carrier.

[0050] An “excimer” is in particular an excimer radiator, also called a short-wave lamp. By means of the excimer, the particularly partially pretreated, particularly partially pre-gelled, radiation-curable fluid on the carrier is illuminated essentially over its entire area. “Essentially” is understood to mean that the surface of the carrier is largely illuminated, although areas such as edge areas can be left out. The excimer can in particular illuminate an area of the carrier along its longitudinal extent at a time. The illumination can in particular take place with respect to the carrier being guided in a continuous movement along the illumination area of the excimer, whereby advantageously high cycle times can be achieved and the overlap areas of the illumination with the excimer are predefined, so that an illumination intensity is essentially constant over the longitudinal extent of the carrier. Alternatively, the illumination can be carried out in a clocked manner.

[0051] Illumination of a partially pre-gelled, radiation-curable fluid applied to a surface of a carrier with a light source, in particular with an excimer, advantageously creates a surface topology, also called microtopology, that resembles the haptics of a natural surface. In addition, pretreatment of the radiation-curable fluid in accordance with the optical pattern advantageously creates a haptically and, in particular, optically perceptible surface topology that corresponds to the optically perceptible optical pattern of the carrier.

[0052] The light source irradiates in particular by means of emission lines with a wavelength in the range of 172 nm to 222 nm with a dose of 0 , 1 mJ / cm 2 up to 10 mJ / cm 2 .

[0053] Surprisingly, it has been shown that irradiation of a pretreated, in particular pregelled, area of a substrate with a light source, in particular with an excimer, produces a first surface modulation, while irradiation of a non-pregelled area with a light source, in particular an excimer, produces a second surface modulation that differs substantially from the first surface modulation. Thus, highly complex surface structuring can advantageously be realized using assembly line technology.

[0054] To manifest the realized surface structuring, the "curing" finally takes place. For this purpose, a curing device is used in particular. Curing under Reduced oxygen atmosphere advantageously realizes a reduction in process time as well as an optimal predefined parameterization of the curing device.

[0055] In one embodiment, the curing device emits UV light, which is used to cure the radiation-curable fluid applied to the surface of the carrier and, in particular, partially pretreated. The curing device is, in particular, a UV lamp, in particular a medium-pressure mercury lamp, an LED lamp, and / or an electron beam.

[0056] Curing can occur before irradiation and / or after irradiation. Accordingly, a first curing device and / or a second curing device can be used.

[0057] In a further aspect, the object is achieved by a device which is configured to carry out the method according to the invention.

[0058] The device comprises in particular at least a first application device, a conveying device, a pretreatment device and a light source, in particular LED, laser and / or excimer. By means of the conveying device, the device is in particular designed to convey a received carrier, in particular downstream at a predefined conveying speed, first to the first application device, the pretreatment device and finally to the Light source, in particular LED, laser and / or excimer. In this way, a first layer of a radiation-curable fluid applied to the surface of the carrier by means of the first application device is partially pretreated, in particular partially pre-gelled, by means of the pretreatment device taking an optical pattern into account, so that an advantageously essentially full-area irradiation of the surface of the carrier by means of the light source, in particular LED, laser and / or excimer, realizes a surface topology on the surface of the carrier corresponding to the optical pattern.

[0059] A "device" is understood to mean, in particular, a production plant for surface modification, also called a coating plant. The device has at least one conveyor device and, starting from an input position downstream to an output position, a first application device, a pretreatment device and a light source, in particular LED, laser and / or excimer. In other words, the first application device, the pretreatment device and the light source, in particular LED, laser and / or excimer, are each individual process stations of the device. In addition or supplementarily, the device has sensors, data transmission systems, supply lines, operating resources, actuators, safety systems, a housing and control devices, which in particular implement or support the machine operation. The device can be additionally or supplementarily coupled or connected to other production systems.

[0060] "Partial" means, in particular, that only a portion of the surface of the carrier is treated, while another portion of the surface remains untreated. The portion to be treated is determined, in particular, by the optical pattern.

[0061] The advantages for the second aspect are analogous to those for the first aspect.

[0062] In the following, the invention is explained with reference to Examples of implementation are shown. Figure 1 is a schematic representation of a Topcoating system Figure 2 is a flow diagram of an inventive procedure .

[0063] A vinyl tile 105 printed with a predefined pattern 131 is introduced 901 into an input area 115 of a topcoating system 101 and thereby brought into engagement with a belt conveyor 103. The belt conveyor 103 transports the vinyl tile 105 at a speed of 10 m / sec first to a roller applicator 107, which applies a photopolymerizable coating agent over the entire surface of the Vinyl tile 105 applies 903.

[0064] The vinyl tile 105 coated with the photopolymerizable coating agent subsequently passes through a Working area of a conveyor in the conveying direction and across the The movable laser 109 is connected to a memory 119 for data exchange, in which a predefined pattern 131 is stored. The movable laser 109 is operated in a nitrogen atmosphere and transfers the predefined pattern 131 to the photopolymerizable coating agent by means of illumination 905, so that a partially pre-gelled cover layer 133 is present.

[0065] Further downstream, the photopolymerizable coating agent applied to the vinyl tile 105 and partially pre-gelled with the laser 109 is irradiated 907 over its entire surface with an excimer 111, so that a vinyl tile 105 with a covering layer having a surface topology 135 corresponding to the predefined pattern 131 is realized. The excimer 111 is operated in a nitrogen atmosphere.

[0066] Finally, the photopolymerizable coating agent is cured 909 over the entire surface using a medium-pressure mercury lamp 113 in a nitrogen atmosphere, so that a vinyl tile 105 with a surface topology corresponding to a predefined pattern 131 is present as the final cover layer 137. Finally, the vinyl tile 105 is discharged from the cover coating system 101 at an output area 117. Reference symbol list 101 Topcoating Plant 103 Belt conveyors 105 Vinyl tile 107 Roller applicator 109 movable laser 111 Excimer 113 medium-pressure mercury lamps 115 Input area 117 Output area 119 storage 131 predefined pattern 133 partially pre-gelled top layer 135 Cover layer with surface topology 137 final cover layer

Claims

Patent claims:

1. A method for surface modification of a carrier (105), comprising the steps: - introducing (901) a carrier (105) at an input position (115) into a conveyor device (103) of a device (101), - applying (903) a radiation-curable fluid by means of a first application device (107) to a surface of the carrier (105), - pretreating (905) the radiation-curable fluid by means of a pretreatment device (109) taking into account an optical pattern (131), - essentially full-surface irradiation (907) of the carrier (105) by means of a light source (111), in particular LED, laser, excimer, - Curing (909) the radiation-curable fluid by means of at least one first curing device (113) so that a surface topology of the carrier (105) corresponds to the optical pattern (131).

2. Method according to the preceding claim, wherein the Conveying device (103) is arranged to convey the introduced carrier (105) downstream at a predefined conveying speed at least at the first application device (107), the Pretreatment device (109) and finally past the light source.

3. Method according to one of the preceding claims, wherein at least the pretreatment (905) and / or the curing (909) is carried out under a reduced oxygen atmosphere.

4. Method according to one of the preceding claims, wherein the Pretreatment (905) a pre-gelling of the layer of the radiation-curable fluid applied to the surface of the carrier (105) by means of the Pretreatment device (109).

5. Method according to one of the preceding claims, additionally comprising downstream before and / or after the pretreatment (905) the step: - Applying a further layer of the radiation-curable fluid using a second application device.

6. Method according to one of the preceding claims, wherein the first curing device (113) emits UV light and a UV emitter, in particular a mercury medium pressure lamp, an LED lamp and / or an electron beam lamp.

7. Method according to one of the preceding claims, wherein the optical pattern (131) is stored in a memory (119) assigned to the device and / or is determined by means of an optical sensor.

8. Method according to one of the preceding claims, wherein the light source (111), in particular an excimer, emits emission lines in the range from 172 to 222 nm with doses of 0.1 mJ / cm 2 up to 10 mJ / cm 2 sends out.

9. Method according to one of the preceding claims, wherein the carrier (105) is a piece goods or web-shaped and comprises wood, ceramic, metal, paper, plastic and / or composite materials.

10. Method according to one of the preceding claims, wherein the pretreatment device (109) for pretreatment (905) comprises a laser held by a guide device and is designed to guide the laser by means of the Guide device taking into account the optical pattern (131) and the predefined conveying speed of the conveying device (103) over the surface of the carrier (105) and thus partially pre-gelling the radiation-curable fluid.

11. The method according to the preceding claim, wherein the laser has a wavelength of 200 nm to 420 nm.

12. The method according to any one of claims 1 to 9, wherein the pretreatment device (109) for pretreating (905) comprises at least one illuminant and a stencil, wherein the stencil corresponds to the optical pattern (131) and the pretreatment device (109) is configured to partially pregel the radiation-curable fluid applied to the surface of the carrier (105) by means of the illuminant and using the stencil in accordance with the optical pattern (131).

13. Device (101) for surface modification of a carrier (105), wherein the device (101) is configured to carry out the method according to one of the preceding claims.

14. Device (101) according to the preceding claim, wherein the Device (101) at least a first Application device (107), a conveying device (103), a pretreatment device (109) and a light source (111), in particular LED, laser, excimer, and is designed to convey the carrier (105) by means of the conveying device (103) downstream at a predefined conveying speed first to the first application device (107), the Pretreatment device (109) and finally past the light source (111), characterized in that a first by means of the first application device (107) a layer of a radiation-curable fluid applied to the surface of the carrier (105) is partially pretreated, in particular partially pregelled, by means of the pretreatment device (109) taking into account an optical pattern (131), so that a substantially full-surface irradiation of the surface of the carrier (105) by means of the light source (111) realizes a surface topology on the surface of the carrier (105) corresponding to the optical pattern (131).

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