Method for applying a surface structure and panel comprising a surface structure

Abstract

The invention relates to a method for applying a surface structure onto a surface of a panel (101, 201), in particular a floor, wall or ceiling panel, comprising the steps of providing at least one extruded core layer comprising an upper core surface and a bottom core surface, wherein the at least one extruded core layer comprises at least one thermoplastic composite material having a Vicat softening temperature of at least 80 degrees Celsius, laminating at least one decorative top layer (110) onto the upper core surface of the core layer such that a laminated panel is formed, wherein at least part of the at least one decorative top layer has a Vicat softening temperature of at most 70 degrees Celsius, applying at least one surface structure onto at least part of at least one surface of the laminated panel by subjecting the laminated panel to at least one pressing step by means of at least one embossing roller (102, 202) and / or at least one press plate (214).

Description

The invention relates to a method for applying a surface structure onto a surface of a panel, in particular a floor, wall or ceiling panel. The invention also relates to a panel comprising a surface structure. To produce an extruded thermoplastic decorative panel, for example a decorative floor panel, the panel is generally first provided with a decor film that conveys a pattern that for example mimics the look of natural wood or stone. The panel is subsequently passed through a series of rollers to emboss a tactile pattern onto the surface. This process may be done in a single pass through specialized equipment that is designed to handle the panel size and thickness. The result is a floor panel with a textured surface that looks and feels like a natural wood or stone floor. To achieve a more realistic-looking panel, a pressed bevel may further be applied to at least one side edge of the panel before cutting it into shape. However, a malleable thermoplastic panel may be stretched up to 2-5% during the extrusion-laminationembossing process due to flow fluctuations in the extruded melt exiting the die and stretching during the lamination process, causing issues with length alignment of at least 1% when cutting and milling panels provided with a pressed bevel, resulting in a misaligned position of pressed bevel on the panel edge, specifically the edges perpendicular to the extrusion direction, and unsightly height differences outside of acceptable standards when cut and milled to a standard specification. In order to create a consistent and high quality (floor) covering comprising multiple panels, the presence of such height differences of two opposing pressed bevels is highly undesired. It is therefore a goal of the invention to provide a solution for extruded panels that are provided with a pressed bevel during an extrusion-lamination-embossing process and that have qualified height differences, and thus to produce a panel having uniform pressed bevel dimensions, in particular a uniform thickness and length, and evenness of bevels, in particular within 0.1 mm. The invention provides thereto a method for producing a panel and / or applying a surface structure onto a surface of a panel, in particular an (extruded) floor, wall or ceiling panel, comprising the steps of: - providing at least one core layer, in particular at least one extruded core layer, comprising an upper core surface and a bottom core surface; - laminating at least one decorative top layer onto the upper core surface of the core layer such that a laminated panel is formed; and - applying at least one surface structure onto at least part of at least one surface of the laminated panel by subjecting the laminated panel to at least one pressing step by means of: o at least one embossing roller and / or o at least one press plate. The at least one (extruded) core layer preferably comprises at least one thermoplastic composite material having a Vicat softening temperature of at least 80 degrees Celsius. The at least one decorative top layer preferably has a Vicat softening temperature of at most 70 degrees Celsius. It is preferred that the at least one (extruded) core layer comprises at least one thermoplastic composite material having a Vicat softening temperature of at least 10 degrees Celsius higher than the Vicat softening temperature of at least one decorative top layer. The invention may include optionally applying a surface structure onto at least part of at least one surface of the laminated panel by guiding the laminated panel over at least one roller, in particular at least one embossing roller or optionally applying a surface structure onto at least part of at least one surface of the laminated panel by guiding the laminated panel through a set of rollers comprising at least one embossing roller. It is preferred that the temperature of at least one embossing roller is at least 20 degrees Celsius below the Vicat softening temperature of the at least one decorative top layer and / or the at least one core layer in particular during at least one pressing step. This means typically that at least one embossing roller is cooled to a temperature at least 20 degrees Celsius below the Vicat softening temperature of the at least one decorative top layer and / or the at least one core layer in particular during at least one pressing step. Counterintuitively, a low temperature, of thus at least 20 degrees Celsius below the Vicat softening temperature of the at least one decorative top layer and / or the at least one core layer, allows the temperature of the thermoplastic material to drop below the glass transition temperature Tg of the core composition and / or the (thermoplastic) decorative top layer, which prevents these from rebounding. Rebounding is a phenomenon that occurs in long chain polymers where a deformation of the polymer creates stresses in the composition, which under elevated temperatures may lead to deformation or a “rebound”, causing the applied surface structure or texture to disappear or become less pronounced in depth and / or width. This is particularly advantageous when applying a relatively deep texture, such as larger than 0.10 mm, preferably larger than 0.15mm, more preferably larger than 0.20mm depth. This is also particularly advantageous when a texture is applied in an at least partially foamed core (or optionally at time of application of a texture, still undergoing foaming in at least part of the volume of the core), as it will solidify the polymeric melt to below its Tg and / or halt the foaming process,thereby creating a rigid support structure. The at least one embossing roller according to the invention can be configured to apply a surface texture having a minimum depth of 0.10 mm, preferably 0.15 mm, more preferably 0.20 mm. The applied depth is preferably smaller than the thickness of the decorative layer. It is for example conceivable that the temperature of at least one embossing roller is in the range of 0-50 degrees Celsius during at least one pressing step and preferably in the range of 5-30 degrees Celsius, more preferably in the range of IQ-20 degrees Celsius.The temperature of at least one embossing roller can for example be below 50 degrees Celsius and preferably below 40 degrees Celsius. This is in particular interesting when applying a texture in a PVC composition comprising at least 40%, more preferably at least 50%, most preferably at least 60% of mineral filler such as limestone. It is conceivable that other ranges are applied more suitable for higher filler ratios and / or thermoplastics with a differing Tg, such as PP, PET and / or PETg. It is also possible that the temperature of at least one press plate is at least 10 degrees Celsius above the Vicat softening temperature of the at least one decorative top layer and / or the at least one core layer and / orwherein the temperature of at least one press plate is at least 10 degrees Celsius above the Vicat softening temperature of the at least one extruded core layer and / or the at least one core layer. This embodiment in particular enables the provision of at least one bevel and preferably at least two bevels to the laminated panel. This embodiment allows the temporary deformation of the at least one top layer and / or at least part of an upper region of the core, in particular the polymeric composition of the extruded core layer. This is particularly advantageous when the at least one top layer has already been provided with at least one surface texture or embossing, as the resulting panel will exhibit both a deep synchronized embossing or texture, an at least partially concavely or irregularly pressed bevel, said bevel surface further comprising a texture or embossing. Preferably, at least one embossing roller and / or at least one press plate is (actively) cooled and / or heated to achieve the desired temperature during at least one pressing step. It is conceivable that the temperature of at least one embossing roller and / or at least one press plate is controlled prior to and / or during at least one pressing step. This can for example be done by at least one control unit. It is also possible that at least one embossing roller and at least one press plate are applied for at least two subsequent pressing steps. Preferably, a first pressing step is applied by at least one embossing roller providing an embossing, preferably an embossing in register and a second pressing step is applied by at least one press plate providing at least one bevel. It is preferable that at least one decorative top layer is applied onto the upper core surface of the core layer in particular such that a laminated panel is formed. This can for example be provided by a thermolamination step. It is conceivable that at least one lamination roller or at least one pair of lamination rollers is applied. The temperature of at least one lamination roller during the lamination step is preferably at least 10 degrees above the adhesive activation temperature of the thermoplastic core and / or the carrier layer of said at least one decorative top layer. The carrier layer of said at least one decorative top layer preferably comprises at least one polymeric material that is also present in the polymeric composition of the at least one (extruded) core layer. It is conceivable that the temperature of the at least one lamination roller is at least, 60°C, preferably at least 80°C. In another advantageous embodiment the temperature of the at least one lamination roller can be at least 100°C, preferably at least 110°C. It is conceivable that a transparent polymeric wear layer is provided on top of said at least one decorative top layer, wherein it is preferred that said transparent polymeric wear layer comprises at least one polymeric material that is also present in the polymeric composition of the at least one (extruded) core layer. It is further conceivable that said at least one decorative top layer comprises at least one ink and / or at least one adhesive resin. The temperature of at least one lamination roller during the lamination step is preferably at least 10 degrees above the adhesive activation temperature of said at least one adhesive resin and / or the polymeric material present in the transparent wear layer. During lamination, preferably at least one nip roller applies at least a lamination pressure to the surface of said laminated panel. It is conceivable that during at least one pressing step at least one back support roller is applied. At least one back support roller is preferably applied in combination with at least one embossing roller. At least one back support roller preferably has a Shore A hardness of 50-70. Such back support roller allows a uniform distribution of force, ensuring a strong lamination strength of for example more than 35N / mm, preferably more than 40N / mm and prevents the panel from becoming too thin during the application of the surface structure. Such back support roller can also be applied in combination with at least one lamination roller. The at least one (extruded) core layer preferably comprises at least one thermoplastic composite material having a Vicat softening temperature of at least 80 degrees Celsius, possibly at least 85 degrees Celsius or at least 90 degrees Celsius. The at least one decorative top layer preferably has a Vicat softening temperature of at most 70 degrees Celsius, possibly at most 65 degrees Celsius or at most 60 or even 50 degrees Celsius. In another advantageous example the at least one core layer comprises at least one thermoplastic composite material, preferably at least one partially foamed thermoplastic composite material having a Vicat softening temperature of at least 60 degrees Celsius, possibly at least 65 degrees Celsius, further possibly at least 70 degrees Celsius or at least 75 degrees Celsius. It is conceivable that the (extruded) core layer comprises a thermoplastic composite material that is designed to have a vicat softening point, and as found by experimentation therefore a Tg, that is at least 10C higher than the at least one decorative top layer and / or the transparent wear layer. The at least one core layer and / or at least one decorative top layer preferably comprises a plurality of stretching markers, wherein the rotational speed of at least one roller, in particular at least one embossing roller is determined and / or adjusted based upon a determined distance between at least two stretching markers, in particular at least two distinct stretching markers. Optionally, the floor, wall, or ceiling panel is an extruded floor, wall, or ceiling panel. This embodiment of the method according to the present invention enables that a batch of extruded panels can be produced wherein all panels have uniform dimensions and / or wherein all panels have a bevel in particular a pressed bevel, having a uniform bevel depth. The use of a plurality of stretching markers, provided on the core layer and / or the decorative top layer allows more precise control over the production process. In particular, by determining and / or adjusting the rotational speed of at least one roller, in particular at least one embossing roller based upon a determined distance between at least two stretching markers, in particular at least two distinct stretching markers, the production process of the panels can be optimized on the spot such that it can be prevented that dimensional differences, specifically uneven stretching, occur. The method according to the present invention allows adjustment of the rate of lamination and embossing according to flow fluctuations in the extrudate. The method according to the present invention further enables that the accuracy of the embossing structure or embossing in register structure and / or at least one bevel, if applied, is optimized and therefore that the dimension deviation between two opposing pressed bevels is minimized. The accuracy of the embossing structure and / or at least one pressed bevel can thus be controlled during the production process of the panel. This solves the technical problem of uncontrolled misaligning during production and / or height differences after profiling. This further reduces production costs and resource losses during the manufacturing process of the decorative panels. The method according to the invention in particular includes the step of applying at least one surface structure onto at least part of at least one surface of the laminated panel by subjecting the laminated panel to at least one pressing step by means of at least one embossing roller and / or at least one press plate. It is also conceivable that a surface structure is applied onto at least part of at least one surface of the laminated panel by guiding the laminated panel through at least one set of rollers comprising at least one embossing roller and / or subjecting the laminated panel to at least one pressing step by means of at least one press plate. When it is referred to a surface structure a surface texture and / or at least one bevel can be meant. At least one press plate can for example be configured to provide a secondary surface structure in the form of at least one bevel and preferably at least two bevels. At least one embossing roller is preferably configured to provide a primary surface structure in the form of an embossing in register (EIR), or an EIR texture. The at least one pressing step, in particular applied via at least one embossing roller, can provide a EIR texture having a maximum texture depth which is less than the total thickness of the decorative top layer. At least one bevel, if applied, preferably has a minimum depth which is greater than the total thickness of the decorative top layer. The surface structure applied during at least one pressing step preferably further comprises at least one positioning marker, preferably a plurality of positioning markers. Said positioning marker if applied, preferably has a minimum depth of at least 0.1mm, preferably 0.2mm, most preferably at least 0.3mm, and / or a maximum depth of at most 1mm, preferably 0.5mm, most preferably at most 0.4mm. The application of said at least one positioning marker may be achieved by means of at least one embossing roller and / or embossing press plate according to the invention, in sequence, parallel or simultaneously to the application at least one further surface texture such as but not limited to at least one pressed bevel and / or surface embossing. Said at least one, preferably a plurality of positioning markers may be utilized by at least one positioning device, at least one sensing device and / or at least one cutting device at a downstream position allowing the accurate cutting, sawing, guillotining or separation of the at least one laminated panel into strips or planks suitable for applying an interlocking mechanism. In particular, the application of said at least one, preferably a plurality of positioning markers enable the automation of said at least one cutting, sawing, guillotining or separation step. In a preferred embodiment, said at least one surface structure further comprises at least one machine readable code, such as a barcode, Aztec code, a MaxiCode, a DotCode, and / or a QR code comprising data related to at least one process or SKU. A surface structure can be applied onto at least part of at least one upper surface of the laminated panel, in particular of the upper surface of the decorative top layer, in particular by guiding the laminated panel over at least one embossing roller, or through a set of rollers comprising at least one embossing roller. The method can also include the step of extruding at least one core layer, said core layer comprising an upper core surface and a bottom core surface. The steps for applying an embossing structure and / or at least one (pressed) bevel are typically related to extrusion. During the lamination step, an extruded core layer and a decorative top layer, for example comprising at least a decor film layer and preferably also a wear layer, can be thermally laminated. The layers of the panel are laminated together, and in one step a surface structure can be provided onto at least part of at least one surface of the laminated panel by guiding the laminated panel over at least one embossing roller or through a set of rollers comprising at least one embossing roller. Guiding the extruded and / or laminated layers over (heated) rollers or through sets of (heated) rollers can cause stretching of the panels. A problem arises from the stretching of the decorative top layer during the production process, wherein the stretching causes the dimensions of bevels placed on the panels to vary. This poses a problem as variable placements of for example pressed bevels on the decorative panel may result in height differences on the edges of the bevels. An edge of a bevel is to be understood as a location on an outer surface of the panel where a non-beveled part of this surface transitions to a beveled part. An edge of a bevel is not to be confused with a beveled or chamfered edge which is generally cut from the material of at least one edge of a panel by means of a double end tenoner. Stretching of the panel can also cause the surface structure of different panels and / or the colour of said panels to deviate outside of qualified ranges. To minimize a length variation between two opposing pressed bevels resulting from the stretching of the panels, a plurality of stretching markers is used and the rotational speed of at least one embossing roller is determined and / or adjusted based upon a determined distance between at least two stretching markers, in particular at least two distinct stretching markers. A length variation is herein also understood as a length difference. A length variation or length difference with respect to a pressed bevel is defined as the difference from a standard length. A bevel placed on an edge of a panel has an edge bevel that is located at a certain height of the panel, measured from a bottom surface of the panel to an upper surface of the panel, i.e. along a thickness of the panel. The height from the lower surface of the panel up to the bevel edge, measured along a side surface of the panel, towards the upper surface of the panel, is defined as the height of the edge of the bevel. The method can include controlling the distance between two distinct stretching markers such that said distance is always same. In particular, the distance between two distinct stretching markers of a panel or extruded core layer can be the same as a distance between two other distinct stretching markers on another panel or extruded core layer. This ensures control and consistency of stretching, and thus the control over placement of the pressed bevels while maintaining the length of the panel. The method according to the present invention in particular enables that the stretching of the produced panel is reduced to 0.2% and pattern and colour differences due to stretching are likewise avoided. Conventional production methods typically experience stretching of panels up to 5%. The decorative top layer of the panel preferably comprises a decorative pattern and / or decorative surface. At least part of the decorative pattern and / or decorative surface defines for example a wood or stone image. The surface structure, if applied, is preferably aligned with at least part of the decorative pattern and / or decorative surface. The rotational speed of at least one embossing roller is typically determined in rpm, or revolutions per minute, the distance between the stretching markers in mm, or millimeters. The determined distance can for example be based on at least two adjacent stretching markers. This can further contribute to the accuracy of the applied method and thus the accuracy of panels produced. In a preferred embodiment, the method includes that the rotational speed of at least one embossing roller is determined and / or adjusted such that the stretching of the laminated panel is below 0.4%, preferably below 0.3%, more preferably below 0.2%. Such a stretching percentage is defined as an elongation percentage. A panel having a length of 1.000 mm prior to stretching, and wherein the stretching is 0.4%, has a length of 1.004 mm after stretching. In another preferred embodiment, the method includes that the rotational speed of at least one embossing roller is determined and / or adjusted such that the stretching of the laminated panel is in a range of 0.01% to 0.2%, in particular in a range of 0.05% to 0.15%, more in particular in a range of 0.75% to 0.1%. Based on experimental tests, it was found that the claimed ranges for stretching result in the dimensional deviation of the panel being within an acceptable error margin and international standards which conventionally require a dimensional deviation of less than 0.1 mm. A deviation is herein also understood as a tolerance. A deviation is an absolute value of half the difference between a measured dimension (such as length, width, or height) of a first panel and the same measured dimension of a second panel. The deviation or tolerance as defined herein is not to be confused with standard deviation. More particularly, these international standards refer to ASTM F2055 (Standard Test Method for Size and Squareness of Resilient Floor Tile by Dial Gauge Method) wherein the size tolerance for resilient floors is 0.4mm / 305mm, and EN 13329:2016 (Elements with a surface layer based on aminoplastic thermosetting resins. Specifications, requirements and test methods), wherein the length tolerance is AL < 0.5mm for panels with I < 1500mm, and AL < 0.3mm for panels with I > 1500mm. One particular advantageous embodiment of an embossing roller applied in a method according to the present invention is a pressed bevel embossing roller, and / or an embossing roller comprising a pressed bevel, wherein a pressed bevel comprises at least one surface which, when viewed from an edge, forms a rounded shape following a circle with radius R for an arc length from the top surface of the panel to a panel edge. An initial distance between at least two stretching markers can be determined prior to at least one pressing step, for example the embossing and / or beveling step and a final distance between said two stretching markers can be determined after the at least one pressing step, for example the embossing and / or beveling step, or after guiding the laminated panel over at least one roller, in particular at least one embossing roller, and wherein the rotational speed of at least one embossing roller can be determined and / or adjusted based upon the difference between the final distance and the initial distance between said two stretching markers. It is also imaginable that at least two initial distances are determined and / or at least two final distances. It is for example also imaginable that the rotational speed of at least one embossing roller is decreased when the final distance between said at least two stretching markers is larger than the initial distance between said two stretching markers and / or that the rotational speed of at least one embossing roller is increased when the final distance between said at least two stretching markers is smaller than the initial distance between said two stretching markers. Decreasing or increasing the rotational speed of at least one embossing roller can contribute to the extent of stretching of the panel, and thus to the dimensional differences between a batch of panels. The extent to which the rotational of at least one embossing needs to be decreased or increased can depend on several process factors. Hence, the required change in rotational speed can for example be experimentally determined for different stretching situations which data can be used in practice. In yet another embodiment, it is imaginable that the pressure applied by at least one embossing roller is based upon a determined distance between at least two different stretching markers and / or based upon the visual inspection by at least one sensor. This can further contribute to control of the production process. In a preferred embodiment, the distance between at least two stretching markers is determined via at least one sensor. At least one sensor can for example comprise at least one optical sensor, at least one image sensor, at least one infrared sensor, at least one laser scanner, or combinations thereof. It is for example useful if at least one sensor is configured to measure and / or determine the distance between at least two stretching markers instantaneous and with a high accuracy, such that at least one process parameter can be adjusted if needed. It is for example imaginable that a first sensor determines the initial distance between at least two stretching markers at a first position and that a second sensor determines the final distance between said at least two stretching markers at a second position. The first position is preferably upstream of a position where the laminated panel is subjected to at least one embossing roller and the second position is preferably downstream of a position where the laminated panel is subjected to at least one embossing roller. It is for example imaginable that the method and / or system according to the invention makes use of multiple sensors, which can be positioned at multiple positions along the production line. The distance between at least two stretching markers can be determined at several positions along the production line. In a particularly efficient embodiment, a single sensor aligns at least one starting marker on at least one lateral edge of the laminated panel with a starting marker on at least one lateral edge of the at least one embossing roller upstream of the embossing roller, while a single sensor aligns at least one, preferably a plurality of accuracy and / or stretching markers on at least one opposite lateral edge of the laminated panel with at least one, preferably a plurality of accuracy and / or stretching markers on at least one opposite lateral edge of the at least one embossing roller upstream of the embossing roller. This simple setup allows for accurate alignment of the start or end of the embossing setup, accurate application of the EIR texture, and / or control of the stretching ratio of the panel during the embossing / lamination process. At least one optical sensor, for example but not limited to a camera and / or an infrared sensor, can for example probe and follow the edges of the decorative top layer via the applied stretching markers. The sensor can determine where the stretching markers are placed and / or determine the distance between at least two stretching markers. A control unit can also be used to compute speed adjustments of at least one embossing roller based upon the data obtained via at least one sensor. The stretching markers and the detection thereof can also be applied for determining the position where the panels need to be cut. The stretching markers themselves can then also be cut away upon finishing of the panel. The stretching markers are in particular for manufacturing purposes. Hence, the method can include the step of cutting the panel such that the stretching markers are removed. At least one sensor can for example be configured to optically probe stretching markers provided on the decorative top layer or core layer to indicate the stretching. The stretching markers can for example be provided by printing, etching, or embossing. The stretching markers are preferably provided at predetermined intervals. The sensor can be configured to check the changes in the stretching of the panel, and in particular the decorative top layer due to the pressing step, or embossing step. The spacing and / or intervals between at least two stretching markers can for example be in the range of 15 to 25 mm, preferably substantially 20 mm. It is for example imaginable that the distance between at least two stretching marker is at least 10 mm and / or at most 30 mm. Examples of imagecapturing devices or optical sensors include infrared sensor, camera for example a line scan camera, an area scan camera and / or laser sensor. In another embodiment, the at least one sensor is chosen from a colour mark sensor or an image sensor. It is also conceivable that at least one subsequent sensor is a position sensor, a displacement sensor, or a rotation speed sensor. At least one sensor can for example also be applied to confirm the position of at least one bevel that is provided by at least one embossing roller. Hence, the method according to the present invention can include the step of validating if at least part of the applied surface structure is applied correctly. Alternatively, or in addition to control of the rotational speed of at least one embossing roller, it is also conceivable that the position of at least one embossing roller is adjusted based upon the determined distance between at least two stretching markers and / or based upon the position of the surface structure applied by at least one embossing roller. It is for example imaginable that the method includes the validation of the depth of at least part of the surface structure and / or of at least one bevel. Subsequently, the pressure applied by at least one embossing roller could be adjusted based upon the determined depth. The method preferably comprises continuously checking the quality of the panel and in particular the amount of stretching and / or the accuracy of the applied surface structure, in particular via visual inspection. It is also imaginable that the method comprises calibration of at least one embossing roller after a predetermined number of revolutions for example after 50,000 to 80,000 revolutions of the embossing roller. It is conceivable that the method includes that an alert to a user is given once the roller has gone through 50,000 revolutions, and / or that a warning once the roller has gone through 80,000 revolutions in particular to prompt the user to calibrate the embossing roller. It is also possible that the circumference of at least one embossing roller is at least 1 to 15% larger, more preferably 3-8% larger or 5-10% than the length and / or width of the at least one decorative top layer. It is also imaginable that at least one embossing roller has a circumference that is larger, for example up to 15% larger, than the length and / or width of the decorative top layer in order to simultaneously apply an embossing onto the surface of the laminated panel and to apply a pressed bevel on the edges of these panels. It is beneficial if the circumference of the embossing roller is at least 5% larger than the length and / or width of the decorative top layer as it allows very accurate control of the stretching of the laminate panels. It is further beneficial if at least one embossing roller has a circumference which is up to 15% larger than the length and / or width of the decorative film / layer as it allows very accurate control of the stretching of the laminate boards or planks. In particular, the present invention aims to control the 5% larger circumference of the embossing roller compared to the decor film and the stretching markers on the edge of the film, which are probed by the sensor to control the accuracy of the embossing and pressed bevel. This solves the technical problem of uncontrolled misaligning during production and height differences after profiling. It is conceivable that at least one embossing roller has a circumference larger than 1200mm, preferably larger than 1500mm, more preferably larger than 1800. However, it is also conceivable that at least one embossing roller has a circumference of at most 2400mm, preferably at most 2600mm, more preferably at most 2800mm. This can result in the provision of extended lengths of visuals and panels. In a possible embodiment, multiple embossing rollers could be used when applying the method according to the present invention. In a possible embodiment, the panel, and in particular the decorative top layer is provided with multiple textures, in particular, a digitally created embossing structure and / or a mechanically created embossing structure. The mechanically applied texture and the digitally applied texture can also be combined resulting in a large number of texture design variations that can be realized for example by varying the digitally applied texture. The surface structure, or texture, as applied can include an embossing structure, wherein relatively deep embossing, such as, for example, an artificial knothole, grouts, grooves, brushstroke structures, plastering techniques, natural and organic structures, stones, artificial animal skin, may be created, which leads to a more realistic appearance of the panel as such. A digitally created first texture and / or the mechanically created second texture may also be used to create one or more bevels, preferably located at one or more panel edges, but which may also artificially and visually divide the panel into two or more smaller panels, such as the case with imitation parquetry. For example, by means of an embossing roller, bevels may be mechanically pressed into the core and / or the decorative top structure. If at least one bevel is applied on at least one edge of the panel, it is preferred that said bevel is provided on the decorative top layer and preferably does not extend into the core layer. It is further imaginable that at least one layer of (cured) coatings is applied on the surface of the decorative top layer and / or upon at least one bevel. If applied, said at least one layer of cured coating covers at least 50%, preferably at least 75%, more preferably at least 95% of the decorative top layer, and at least 50%, preferably at least 75%, more preferably at least 95% of at least one bevel. Said at least one layer or a plurality of cured coatings, applied to the surface of the decorative top layer and / or the surface of said bevel, can be called a top coating. A particularly advantageous coating is one that may be UV-, EB- and / or excimer-cured, in particular when cured to form an ultra matte coating with a gloss level of 2-4Gu, which creates a particularly striking effect in combination with at least one pressed bevel, preferably a pressed bevel extending below the level of at least one decorative design and / or to a depth that is greater than the thickness of the at least one decorative top layer, and at least one deep texture, preferably a texture of at least 0.2mm up to at most a depth equal to the thickness of the at least one decorative top layer. Said coating will then be applied in a subsequent step, preferably prior before cutting into strips, planks or tiles, but after application of the at least one texture and / or pressed bevel. It is for example imaginable that at least one embossing roller has a diameter in the range of 300 to 650 mm, preferably in the range of 350 to 500 mm, more preferably in the range of 400 to 450 mm. At least one embossing roller can for example have a diameter of at least 300 mm, preferably at least 400 mm, more preferably at least 425 mm. At least one embossing roller may for example also have a diameter of up to 600mm, preferably up to 700mm, or up to 800mm. The dimension of the roller(s) applied can depend on the intended product which is to be produced. In a beneficial embodiment a plurality of stretching markers is provided on at least one longitudinal edge and / or lateral of the core layer and / or the decorative top layer. At least part of the plurality of stretching markers can for example provided at intervals in a range of 5 to 50 mm, preferably 10 to 40 mm, more preferably 15 to 25 mm in particular from center to center. Such intervals provide a good reference for determining deviations due to for example stretching. It is imaginable that the stretching markers are formed by stripes, lines, circles, figures and / or combination thereof. The stretching markers are preferably visually observable. When the stretching markers are provided on at least one longitudinal edge and / or lateral edge of the decorative top layer, the decorative top layer is preferably guided through a dancing roller system or dancer roller in order to maintain consistent tension in the film, allowing the roller to adjust its position according to changes in tension or speed, ensuring smooth and even movement of the decorative top layer without excessive stretching or slack. Hence, the at least one decorative top layer may be guided over at least one dancer roller configured to regulate tension fluctuations. At least one dancer roller can be rotatably mounted on a lever, wherein for example at least one end of the lever is pivotally mounted. At least one dancer roller may provide a particularly useful synergy with the described system and avoids any variations in position of the stretching markers before, during or after lamination. At least one embossing roller can comprise at least one motor, preferably at least one servo motor. The rotational speed of the embossing roller can be controlled via said at least one motor. It is for example imaginable that the motor is actuated and / or adjusted based upon at least one determined distance between at least two stretching markers. Control of the rotational speed of at least one embossing roller can for example be done by making use of at least one control unit. At least one control unit can for example be configured to run calculations to provide real-time adjustment to match the (rotational) speed of at least one (embossing) roller with the changes in the stretching of the panel, determined via the distance between at least two stretching markers. The control unit can for example take at least one of the following process parameters into account upon adjusting the rotation speed of at least one embossing roller: the diameter of at least one embossing roller, the initial and final distance between at least two stretching markers, the duration and / or distance between at least two sensed stretching markers, the initial position of at least one stretching marker and / or the initial position of at least one (servo) motor of at least one embossing roller. The control unit can be configured to calculate the rotational speed and / or a deviation of a distance between at least two stretching markers prior and after at least one pressing step, in particular at least one embossing and / or beveling step and adjust the rotational speed of at least one embossing roller. The motor speed of at least one servo motor can for example be adjusted. The stretching markers are in particular uniformly spaced line marks on the decorative top layer and / or core layer that indicate where the design starts and ends and serve as means to aid in the control of the stretching of the panel. More preferably, the at least one stretching marker is imprinted on at least one longitudinal edge on the decorative top layer and / or core layer of the panel. A non-limiting example on how to adjust the rotational speed of at least one embossing roller is described hereinafter. The adjusted rotational speed of the (servo) motor that drives at least one embossing roller to offset the stretching of the decorative top layer can be calculated by the control unit using the following steps: (1) determine the initial rotational speed of at least one embossing roller; determine the initial calculation parameters, for example a stretching marker initial position, the distance between at least two stretching markers and / or the initial position of the motor, and determine the position of the i-th stretching marker; (2) calculate the circumferential angle corresponding to the initial velocity of the embossing roller surface speed and / or motor initial speed of the i-th frame and stretching speed; (3) calculate the working length of the panel for the i-th frame of the roll of the embossing roller; (4) calculate the basic rotation speed Hi of the i-th frame of the embossing roller; 5) in turn, let i take the values 1, 2, 3,... m, and m is the total number of frames, and optionally repeat steps (2) to (4) to obtain the required base speed Hi for each; (6) calculate the adjustment speed of the embossing roller; and (7) adjust the speed of the embossing roller according to the adjustment speed. It is conceivable that the longitudinal and / or lateral deviation of the decorative panel is adjusted by adjusting the feeding tension of the decorative foil. In another embodiment, the distance between at least two stretching markers constitutes a specific section of a pattern on the decorative top layer. Alternatively, the at least one stretching marker could be a colored printing line, preferably a black or other colored line, positioned along the longitudinal side of the decorative top layer. It is a possibility that the measured deviation as used herein pertains to a deviation range that is difficult to detect visually, such as a deviation of 0-2 mm, with a preference for 0-0.5 mm. At least one embossing roller can be configured to provide surface structure to a panel. At least one embossing roller can for example comprise a surface texture, which surface texture can be transferred to a panel. At least one embossing roller is preferably configured to provide at least one embossing structure or embossing in register structure and / or at least one embossing roller is configured to provide at least one bevel. It is for example possible that at least one embossing roller is configured to provide both an embossing structure and at least one bevel. Hence, the provision of an embossing structure and at least one bevel can be done simultaneously and / or performed in a single step. It is for example also imaginable that at least one embossing roller is configured to provide multiple bevels to the same panel. The use of a multifunctional embossing roller is very effective and efficient. In such embodiment, it is preferred that the temperature of at least one embossing roller is at least 10 degrees Celsius above the Vicat softening temperature of the at least one decorative top layer and / or the at least one core layer. However, this requires the provision of a controlled system in order to prevent misalignment of the applied structures. Alternatively, or additionally, the method can include the step of applying at least one bevel to the laminated panel by guiding the laminated panel over at least one bevel roller. It is imaginable that the method comprises the step of validating the position of the at least one bevel and determining and / or adjusting the rotational speed of at least one embossing roller and / or at least one bevel roller based upon the validated position of the at least one bevel. It is also possible that the method includes two pressing steps, wherein a first pressing step is applied by at least one primary embossing roller operating at a temperature which is at least 20 degrees Celsius below the Vicat softening temperature of the at least one decorative top layer and / or at least 20 degrees Celsius below the Vicat softening temperature of the at least one decorative top layer and wherein a second pressing step is applied by at least one secondary embossing and / or bevel roller of which the temperature is at least 10 degrees Celsius above the Vicat softening temperature of the at least one decorative top layer and / or at least 10 degrees Celsius above the Vicat softening temperature of the at least one core layer. In this way, for example both an EIR texture and at least one bevel can be applied in a continuous process. Possibly, the method comprises the step of applying at least one bevel to the laminated panel during at least one pressing step, wherein the at least one press plate is provided in a traveling press. At least one traveling press can for example be configured to move synchronously with the extruded panel along the extrusion and / or process line. In one particularly advantageous embodiment, the traveling press is located downstream of the at least one extrusion-lamination process, specifically downstream of at least one first texturing or embossing roller. At least one travelling press can for example comprise a lower pressing element and an upper pressing element which are mutually displaceable, wherein at least one of the pressing elements is configured to impart a surface structure to the panel. At least one drive unit can be applied for moving the travelling press along the extrusion line. At least one control unit can be applied to control the displacement of at least one traveling press. It is conceivable that the embossing or surface structure created during the rolling process on the decorative top layer aligns longitudinally with the corresponding pattern on said surface structure or embossing. At least part of the surface structure applied onto at least part of at least one surface of the laminated panel by guiding the laminated panel over at least one embossing roller can be aligned longitudinally with the corresponding pattern on the decorative top layer. In instances where the designated section is observed to be lagging behind its corresponding part, the approach involves reducing the feeding tension of the decorative top layer before rolling, thereby reducing its stretching length. This leads to an increased lag value of the designated part during subsequent rolling until the deviation between the designated part and the corresponding part reaches zero. Consequently, this ensures that the embossing created during the rolling step on the decorative top layer aligns longitudinally with the corresponding (decorative) pattern on the surface structure. It is also a possibility that the longitudinal difference in the surface structure can be assessed either by a disparity in distance or a variation in time between the identified predetermined section on each unit pattern of the decorative top layer and the identified corresponding part on the embossing roller associated with the predetermined part. It is conceivable that a first plurality of stretching markers is provided on a first longitudinal edge of the core layer and / or the decorative top layer and a second plurality of stretching markers is provided on a second longitudinal edge of the core layer and / or the decorative top layer. It is for example conceivable that a plurality of stretching markers is provided on at least one longitudinal edge and / or lateral edge of the decorative top layer, and that the decorative top layer is preferably guided through a dancing roller system or dancer roller in order to maintain consistent tension in the film. It is for example possible that the first plurality of stretching markers, or primary markers, identify the start and finish of the decorative design. The first plurality of stretching markers can for example be placed 1000mm, 1200mm, 1500mm, 1800mm, 2400mm apart from each other. The primary markers can be applied to control the stretching. The second plurality of stretching markers, or secondary markers, are placed at a distance of 1-50mm, preferably 5-40mm, more preferably 10-30mm apart from each other. Such secondary markers can be used to accurately apply the surface structure. In an exemplary embodiment of the present invention, if the at least one stretching marker is identified as being ahead of another stretching marker, the feeding tension of the decorative top layer is increased to extend its stretching length before rolling. This action diminishes the leading value of the at least one stretching marker during subsequent rolling until the deviation between two stretching markers reaches zero. As a result, the decorative pattern and / or decorative surface on the decorative top layer aligns longitudinally with the corresponding surface structure. In another exemplary embodiment of the present invention, the control unit also includes a detection mechanism for identifying the longitudinal difference between the embossed design on the embossing roller and the corresponding pattern on the decorative top layer during the rolling process. Optionally, at least one tension control device is positioned on an at least one subsequent feeding mechanism. Upon the detection of a longitudinal discrepancy between the embossed design on the embossing roller and the corresponding pattern on the decorative top layer, the control unit controls the at least one tension control device to regulate the tension of the decorative top layer between the second feeding mechanism and the at least embossing roller based on the longitudinal difference. This adjustment is carried out to modify the stretching length of the decorative top layer before rolling, thereby minimizing the longitudinal discrepancy during subsequent rolling until the embossed design aligns with the corresponding pattern on the decorative top layer during rolling, ensuring that the embossing structure corresponds longitudinally with the pattern on the decorative top layer. The method can also include the step of profiling and / or edging at least one side edge of at least one laminated panel. It is for example imaginable that the step includes the provision of coupling elements or coupling parts, preferably complementary coupling elements or coupling parts. The core layer may optionally comprise complementary coupling parts. The core could for example comprise at least one pair of opposite side edges which are provided with complementary coupling parts. The complementary coupling parts, if applied, are typically configured for interconnecting adjacent panels. Typically, at least one pair of opposite side edges of the core layer is provided with complementary coupling parts. For example, the core layer comprises at least one pair of complementary coupling parts on at least two of its opposite side edges. Said coupling parts may for example be interlocking coupling parts configured for mutual coupling of adjacent panels in multiple directions. Preferably, said interlocking coupling parts provide locking in both horizontal and vertical directions. Any suitable interlocking coupling parts as known in the art could be applied. For example, said interlocking coupling parts may be in the form of complementary tongue and groove, male and female receiving parts, a projecting strip, and a recess configured to receive said strip or any other suitable form. It is conceivable the complementary coupling parts require a downward scissoring motion when engaging, or are locked together by means of a horizontal movement. It is further conceivable that the interconnecting coupling mechanism comprise a tongue and a groove wherein the tongue is provided on one side edge of one pair of opposite side edges, and the groove is provided on the other side edge, or an adjacent side relative to that of the tongue, of the same pair of opposite side edges. Such design of coupling mechanism is well-known in the art and has proven highly suitable for panels for floor coverings such as a floating floor. In a further embodiment it is possible that the interconnecting coupling mechanism has an interlocking feature which prevents interconnected panels from any free movement (play). Such an interlocking feature may be a projection and a respective recess provided on the respective opposite side edges by which neighboring panels interlock with each other. It is conceivable for provisions of reinforcement in the interlocking coupling parts to improve strength and prevent breakage thereof during the installation of the panels. For example, the complementary or interlocking coupling parts may be reinforced with materials such as but not limited to fiberglass mesh, reinforcing sheets, carbon fibers, carbon nanotubes, ceramics, glass, arrays of metallic or non-metallic rods, or polymer compounds integrally formed in the core layer. It is also conceivable that a strengthening coat layer of micro or nanotechnology is added on the surface of the interlocking coupling parts. The panel according to the present invention and / or the panel obtained via the method according to the present invention is suitable for use in flooring, wall or ceiling coverings preferably featuring a locking mechanism. As such a 'floating' covering can be assembled by interconnecting the individual panels with each other at all four sides, without the need for adhesives. It is possible that the method provides for the provision of a laminated board comprises a core layer and at least one decorative top layer, and that said board is cut into panels. The coupling parts can be provided on the panels. In a preferred embodiment, the method includes that at least part of the laminated panel is heated prior to the structuring step, for example the embossing and / or bevelling step. It is imaginable that at least part of the surface which is to be structured is heated prior to the structuring step. In an exemplary embodiment, the panels are heated by the at least one embossing roller at a temperature of at least 170°C, preferably at a temperature of 180°C. This can further optimize the transfer of the surface structure and / or enhance the quality of the applied surface structure. Alternatively and / or additionally, the panels are cooled by the at least one embossing roller at a temperature below 60°C, preferably below 50°C. It is also imaginable that at least one embossing roller has a cooling and heat dissipation structure which can for example be configured to stop the shrinking of the core layer and therefore of the panel. At least one cooling conduit can be provided, and the cooling conduit can cooperate with an external device to convey a cooling liquid for cooling the panel. In an exemplary embodiment, the panels are guided through a feeding device at a speed of at least 1.5 meters per minute, preferably at a speed of at least 2.5 meters per minute. This speed may, for example, be 2 meters per minute. The feeding device comprises two parallel belts or bands for feeding rectangular-either elongated or square-decorative panels through the system. The system is configured to, during this feed-through operation, keep the first pair of edges of the decorative panels parallel to the feed-through direction of the panels through the roller. The feeding device may also comprise one or more second bands or second belts, to press the panels against the one or more belts or bands when said panels are being fed through the system, such that the panels can be guided between the one or more belts or bands and the one or more second bands or second belts through at least a part of the system. The at least one pair of belts / bands is preferably configured to carry the panels while the panels are being fed through the feeding device. The at least one pair of belts / bands are configured to carry the panels in such a way that the panels, if these comprise a core layer and a top layer comprising a decor film layer, the panels rest with its top layer on the at least one pair of belts / bands. The at least one pair of belts / bands are also configured to carry the panels so that they rest with their core layer side on the one or more belts or bands. The invention alternatively also relates to a method for producing a panel, in particular a floor, wall or ceiling panel, comprising the steps of providing at least one core layer comprising an upper core surface and a bottom core surface, laminating at least one decorative top layer onto the upper core surface of the core layer such that a laminated panel is formed, guiding the laminated panel over at least one roller, wherein at least one core layer and / or at least one decorative top layer comprises a plurality of stretching markers, and wherein at least one process parameter, for example the rotational speed of at least one roller, is determined and / or adjusted based upon a determined distance between at least two stretching markers, in particular at least two distinct stretching markers. The invention also relates to panel, in particular a floor, wall or ceiling panel, preferably obtained via a method according to the present invention, said panel comprising at least one core layer comprising an upper core surface and a bottom core surface and at least one decorative top layer laminated onto the upper core surface of the core layer, wherein optionally at least one surface of the panel comprises a surface structure and wherein at least one edge of the panel comprises at least one bevel. Preferably, wherein an absolute difference in a projected vertical height of a bevel edge of a first of these panels and a projected vertical height of a bevel edge of a second of these panels is smaller than 0.05 mm. A definition of the projected vertical height of a bevel edge is provided herein below. At least one core layer is preferably an extruded core layer. At least one core layer may comprise at least one thermoplastic composite material having a Vicat softening temperature of at least 80 degrees Celsius and / or at least part of the at least one decorative top layer may have a Vicat softening temperature of at most 70 degrees Celsius. The panel according to the present invention in particular benefits of a relatively low stretching. It if for example imaginable that the panel according to the present invention has a stretching of maximum 0.2%. When a pressed bevel is applied on at least one outer end, preferably on two outer ends of the panel, with at least one pressed bevel, preferably two pressed bevels, each pressed bevel can have an outside surface that is shaped cross-sectionally as an arc of a circle with radius R. Such a bevel has a bevel edge at cut-off point p. Cut-off point p identifies the location on an outer surface of the bevel seen from a cross-sectional view of the edge of panel perpendicular to a direction of extension of the bevel after profiling. It is particularly advantageous if the first bevel edge identified with point pi is located at a standard height and length Hi and Li, respectively, where Hi is the vertical height projected and identified by Hi = R x cos(ai), and Li is the horizontal length projected and identified by Li = R x sin(ai), where oil is the angle in radians formed between a line extending from the centre of the circle, that is, from the bottom point of the arc up to point pi, and Li, and wherein x is a multiplication operator. The second edge may then comprise a cut-off point p2 located at a height and length H2 and L2, defined by H2 = R x cos(a2), and L2 = R x sin(a2), respectively, where the length variation of the panel, in particularly a length variation between two opposing pressed bevels, must then be less than any L2 for which H2 is within a 0.05mm variation of Hi, for a total acceptable variation of 0.10mm. This can then be understood to be a range of L2.min, defining a minimum length, to L2,max, defining a maximum length, corresponding to an H2,min to H2,max, defining a minimum height and a maximum height, respectively, wherein H2,min = |Hi -tolerance|, H2,max = |Hi + tolerance|, and, logically, L2,min = arccosine(H2,max I R) and L2,max = arccosine(H2,min / R). The acceptable length variation of the panel, in particular between a length variation between two opposing pressed bevels and / or between any two cutoff points pi and p2 is then defined as L2,max - L2,min = [arccosine(H2,min / R) - arccosine(H2,max / R)] where H2,max - H2,min < 0.1mm. It is conceivable that a length variation for a pressed bevel with a cutoff point at a standard height Hs may then be described in function of a max allowed height difference of |0.1mm|, an absolute deviation of +1- 0.05mm and / or |0.05mm| vs Hs, With Hmax — HS + 0.05, Hmin — Hs — 0.05, with Hmax / R — COS(CXmax), Hmin / R — COS(CXmin), an accepted total difference in distance between two pressed bevels or total length difference Ldif = [arccosine(Hmin / R) - arccosine(Hmax / R)] and / or [arccosine((Hs+0.05) / R) - arccosine(Hs-0.05) / R)], and an accepted length variation Lvar = + / - [arccosine(Hmin / R) - arccosine(Hmax / R)] and / or +1- [arccosine((Hs-0.05) / R) -arccosine((Hs+0.05) / R)]. A panel with nominal length LnOm may then have a predefined length or nominal distance between pressed bevels Lpb,nom with a tolerance or variation of Lpb,var = Lpb,nOm +1- [arccosine((Hs-0.05) / R) -arccosine((Hs+0.05) / R)] / 2. It is further imaginable that the at least one edge of the panel comprises a pressed bevel wherein an outer surface of the bevel, seen from a cross-sectional view in a direction perpendicular to a direction of extension of the bevel is definable with an arc of a circle having a radius R with and with cut-off points pi and p2, wherein cutoff points p1 and p2 have corresponding heights Hi and H2, respectively, wherein the variance between Hi and H2 is expressed by s2 and wherein this s2 is <0.1 mm. s2 is defined as follows: 1 _ 2 s2=^“r / n - Wherein n is an integer defining the number of heights H, and H is the average height. For a variance between Hi and H2, n equals 2, and H equals (Hi + H2) I n. When two opposing pressed bevels on extruded panels have a controlled distance in between with a nominal and accurate cutting length, the panel may be exposed to stretching during production, causing an irregular distance between two pressed bevels. This distance can be defined by the allowed absolute deviation in height, being the standard height of the cut-off point on the pressed bevel (when cut at the nominal length of the panel) and the radius defining the rounded contour of the pressed bevel. In exemplary embodiment of the present invention, the total allowed height difference between projected heights of two panels is 0.1mm or +1- 0.05mm, according to ISO 10582, which pertains to the absolute deviation or tolerance. The absolute deviation therefore differs from the standard deviation, which is a derived limitation. In another exemplary embodiment and in view of the above, the tolerance or absolute deviation of projected height differences, being |0.05mm|, the square of each difference, being each variation from the standard height, is expected to fall between 0.0001 and 0.0025, The variance herein, is approximately 0.0013, and a standard deviation, which is the square root of said variance is approximately 0.036, such that the standard deviation of the projected height may be 0.036mm or less. Variance is defined the average of all squared differences between an actual measured distance, such as a height of a bevel and a standard distance, such as a standard height or mean height of the bevel. It is further conceivable that the variance is not analogous nor directly linked with the allowed 0.1mm absolute deviation. Further, taking the square root of the variance gives the standard deviation which is a derived limitation. It is likewise conceivable that variation / difference should therefore be understood as the difference from a standard, such that the standard is +1- 0.05mm, and conversely the difference being the subtractive result between two numbers. It is imaginable that the controlled distance between two opposing pressed bevels on an extruded panel with a nominal and accurate cutting length, where the panel may be exposed to stretching during production, resulting in an irregular distance between two pressed bevels. Said distance can be defined by the allowed absolute deviation in height, being the standard height of the cut-off point on the pressed bevel, such that when cut at the nominal length of the panel, and the radius defining the rounded contour of the pressed bevel. It is therefore conceivable that the allowable height deviation or tolerance of a cutoff point is +1- 0.05mm, pertaining to the height that is projected on the vertical axis of the rounded edge of an at least one pressed bevel. It is preferable that the method according to an aspect of the present invention considers the length of the length of the panel and / or distance between two adjacent pressed bevels and adjusts the speed of the at least one stretching marker according to the length variation, thus, to increase the accuracy of the stretching adjustments for long panels, and decrease for short panels. The panel according to the present invention is for example a floor, wall or ceiling panel, but can also be a decorative panel or a building panel. The panel according to the present invention preferably comprises a surface structure. Said surface structure can for example comprise an embossing (in register) structure and / or at least one bevel. It is for example imaginable that at least one bevel is provided on at least one side edge of the panel, in particular at least one lateral side edge. It is also imaginable that at least one panel comprises two opposing bevels, preferably provided at two opposing lateral side edges. At least one bevel can for example have a linear shape such that the bevels of at least two adjacent panels form a V-shape. In another embodiment at least one bevel has a convex shape such that the bevels of two adjacent panels form a U-shape. In another embodiment at least one bevel has a concave shape, such that the bevels of adjacent panels form a curved V-shape. The surface structure preferably has a maximum texture depth which is less than the total thickness of the decorative top layer and / or at least one bevel has a minimum depth of which is greater than the total thickness of the decorative top layer. Preferably, at least one surface of the panel comprises a surface structure wherein the maximum texture depth of the surface structure is less than the total thickness of the decorative top layer and / or the panel, preferably at least one edge of the panel, comprises at least one bevel wherein the minimum depth of at least one bevel is greater than the total thickness of the decorative top layer. An upper surface of the panel can comprise at least one, and preferably at least two bevels positioned at a distance from at least one lateral edge of the panel. This can provide an embodiment of the panel that has a visual appearance resembling multiple panels. The edges of the panel can for example feature an optional chamfer or bevel to enhance the visual effect of real material such as wood, real stone, or ceramic, simulating a grout or mortar of a tile, or the chiselled or milled edge of a wood panel. Possibly, the bevels of two adjacent panels having a substantially square shape define a grout, for example an imitation grout. An advantage of beveled panels is that beveled panels allow for a higher degree of error in both production and installation as height differences are not noticeable even if the panels are not perfectly levelled. The chamfer or bevel provides a very slight angle or inclination visible on the finished flooring, wall panel, or ceiling panel surface, thereby providing further some degree of dimensionality and realism to the panel. The method according to the present invention aims to apply at least one bevel and an at least partial embossing on a top surface of a decorative panel while reducing the effects of panel stretching during processing and the misalignment of the pressed bevels. Further, the method according to the present invention can address the effects of changes in the environment that affect the stretching of the panel during manufacturing by confirming the placement of the bevels and calibrating the speed of at least one embossing roller accordingly to reduce stretching. At least one decorative top layer can for example comprise at least one decor layer and / or at least one transparent wear layer. At least one decorative top layer can for example comprise at least one layer selected from the group of: a PVC decorative film, a PP decorative film, a PE decorative film, a PET decorative film, a PET -glycol decorative film, a stone veneer and / or a wood veneer. It is also imaginable that at least one decorative layer comprises a decorative print which is printed directly on the upper core surface of the core layer and / or on a carrier foil. According to the present invention, at least one decorative top layer is provided or attached to the top surface of the core layer. Herein, the decorative top layer can also be referred to as decor layer or decorative layer, decorative surface, print layer, or a digitally printed layer. At least one decorative top layer can for example be a veneer layer, such as but not limited to wood veneer, a stone veneer, a flexible stone veneer, a flexible tile, and / or a natural veneer layer. The decorative top layer may for example comprise a flexible ceramic tile. The decorative top layer preferably comprises cellulose, fibrous, or paper layer having a decorative image or pattern that is provided via digital printing, laser printing, inkjet printing, rotogravure printing machine, electronic line shaft (ELS) rotogravure printing machine, automatic plastic printing machine, offset printing, flexography, or rotary printing press. Preferably, at least one decorative top layer is a flexible paper or foil that can used with roller press or lamination machines which requires that the flexible paper is rollable, pliable, or roller-compatible. Preferably, the thickness of at least one decorative top layer is in the range of 0.05 mm and 0.10 mm, for example substantially 0.07 mm. The at least one decorative top layer preferably comprises at least one decor layer and / or at least one protective layer. It is conceivable that at least one decor layer is attached to said core layer, if applied. It is also conceivable that the decor layer is a print layer. It is also conceivable that at least one decorative layer is a print layer, in particular a digital print layer. It is conceivable that the print layer, such as a rotogravure print or digital print layer, further comprises at least one resin allowing thermolamination between said print layer and said at least one protective layer, such as a transparent wear layer. The decor layer may also form integral part of the core layer. In a beneficial embodiment of the panel, at least part of the upper surface of the core layer is provided with at least one decorative pattern or decorative image. It is for example possible that such decorative image or pattern is provided via printing, for example via digital and / or inkjet printing. It is also possible that at least one decorative pattern is formed by relief provided in the upper surface of the core layer or panel. It is also conceivable that the decor layer or decorative layer is a separate layer, for example a high-pressure laminate (HPL), a veneer layer, a directly laminated paper layer, and / or a ceramic tile. In a preferred embodiment, at least one decorative layer comprises a thermoplastic film or a ply of cellulose. It is for example possible that the decor layer comprises a plurality of impregnated layers containing lignocellulose but also a wood veneer, a thermoplastic layer, a stone veneer, a veneer layer or the like and / or a combination of said materials. The veneer layer is preferably selected from the group comprising of wood veneer, cork veneer, bamboo veneer, and the like. Other materials such as ceramic tiles or porcelain, a real stone veneer, a rubber veneer, a decorative plastic or vinyl, linoleum, and laminated decorative thermoplastic material in the form of foil or film. The thermoplastic material can be PP, PE, PET, PETg, PVC and the like. The design of the decorative layer can be chosen from a design database which includes digitally processed designs, traditional patterns, pictures or image files, customized digital artworks, randomized image pattern, abstract art, wood-patterned images, ceramic or concrete style images, Al-generated or user-defined patterns. The designs can be printed or reproduced using laser printers, inkjet printers, or any other digital printing means including the conventional printing methods. Various types of inks can also be used to suit the design needs of the decor layer. Preferably, the ink used during the printing method comprises properties such as but is not limited to waterproofness, lightfastness, acid-free, metallic, glossy, sheen, shimmering, or deep black, among others. It is desirable that the decorative layer is visually exposed by the coating layer being a substantially transparent coating layer. The decor layer may comprise a pattern, wherein the pattern is printed via digital printing, laser printing, inkjet printing, rotogravure printing machine, electronic line shaft (ELS) rotogravure printing machine, automatic plastic printing machine, offset printing, flexography, or rotary printing press. It is further conceivable that the panel, and in particular at least one decorative top layer includes a surface structure and / or a tactile texture, preferably of at least 0.1 mm depth, preferably at least 0.15 mm, more preferably at least 0.20 mm, most preferably at least 0.3 mm depth. Such tactile texture may provide an enhanced visual effect. The enhanced visual effect could also be referred to as embossing. In a possible embodiment of the invention, a texture or embossing can be provided during the production process by means of rotary or plate imprinting. It is possible that at least one wear layer, if applied, is embossed with a surface texture design. The texture design can be any design desired, such as the natural texture found in wood, stone and the like. The tactile structure, if applied, may for example have an irregular tactile texture. It is also conceivable that only part of the decorative top layer is provided with a tactile texture. In another possible embodiment, both the upper surface of the decorative top layer and the surface of a chamfer, which may be applied, can include a tactile texture, preferably of at least 0.1 mm depth. Especially when the top layer is provided via a lamination process, a single press machine can be used which makes it cost efficient to use a press plate with matching embossing for each decorative pattern in order to obtain a relief pattern on the top surface of the panel that matches the decorative pattern. It is further conceivable that at least one bevel, and in particular at least one pressed bevel has a depth of at least 0.5 mm, preferably at least 1 mm. Such pressed bevel may provide an enhanced visual effect. The enhanced visual effect could also be referred to as an enhanced bevel, circular bevel, chiselled edge, irregular edge and / or rounded bevel. In a possible embodiment of the invention, said pressed bevel can be provided during the production process by means of rotary imprinting. It is possible that at least one wear layer, if applied, is embossed with said pressed bevel. It is conceivable that the depth of the pressed extends into the core layer. It is further conceivable that at least one edge, preferably at least two opposing edges, most preferably two pairs of opposing edges, comprise at least one pressed bevel. In one possible embodiment, the depth of the pressed bevel on at least one pair of opposing edges is different from the other pair of opposing edges. It is further conceivable that at least one bevel, and in particular at least one pressed bevel has a width of at least 0.5 mm, preferably at least 1 mm, more preferably at least 2 mm, most preferably around 2.5 mm. Such pressed bevel may provide an enhanced visual effect. The enhanced visual effect could also be referred to as an enhanced bevel, circular bevel and / or rounded bevel. It is also conceivable that at least one bevel, and in particular at least one pressed bevel, defines an irregular edge pattern imitating a chiselled edge, saw cut edge, natural stone edge or the like where the width of said at least one pressed bevel may fluctuate across the lateral width and / or length of the panel, such as but not limited to 0.5-3mm, 1-2mm, 2-3mm and the like. It is further possible that at least one pressed bevel is applied across the surface of at least one panel to create the illusion of multiple smaller panels and / or tiles, a pillowed surface, and the like. In a possible embodiment of the invention, said pressed bevel can be provided during the production process by means of rotary imprinting. It is possible that at least one wear layer, if applied, is embossed with said pressed bevel. It is conceivable that the width of the pressed extends into the core layer. It is further conceivable that at least one edge, preferably at least two opposing edges, most preferably two pairs of opposing edges, comprise at least one pressed bevel. In one possible embodiment, the width of the pressed bevel on at least one pair of opposing edges is different from the other pair of opposing edges. It is also conceivable that the decorative top layer comprises at least one decor layer and at least one base coating layer. In a further embodiment, the panel comprises at least one base coating layer which covers at least part of the upper surface of the decor layer. In case the decorative top layer also comprises at least one wear layer, the base coating layer is preferably provided on an upper surface of the wear layer. The base coating layer is applied to protect the panel, and in particular the decorative top layer, during further processing, for example during cutting, sawing, punching, profiling, edging and / or beveling of the panel. The base coating layer is preferably applied prior to the chamfer(s) are provided and / or prior to profiling of the panel. The base coating layer is preferably substantially transparent or translucent. The decor layer can be better observed. The base coating layer can for example be formed by a substantially transparent primer. The base coating layer can also be formed of any of the coating as described for the present invention for forming the at least one coating layer. The application of at least one base coating layer to the upper surface of the decor layer prior to steps of cutting, profiling and / or bevelling can contribute to the reduction of resistance between the cutting tools and the floor panel during the cutting, profiling and / or bevelling step. This can prevent that a white line is forming in the panels and may also reduce irregularities in the cut line between adjacent panels. The thickness of the panel, and in particular the thickness of the core layer is preferably at most 6 mm, more preferably at most 5 mm. In a preferred embodiment, the panel comprises at least one core layer having a maximum thickness of 8 mm, more preferably 6 mm, or most preferably 4 mm. The density of said at least one core layer is preferably in the range of 700-2100kg / m3, more preferably 700-1400kg / m3 in the case of decorative wall or ceiling panels, more preferably 1400-2100kg / m3 in the case of decorative floor panels. It is also conceivable that the panel comprises multiple core layers with different densities, such as a first core layer having a density of 700-1400kg / m3, more preferably 900-1200kg / m3, and a second core layer having a density of 1600-2100kg / m3, more preferably 1700-2000kg / m3. At least one core layer is preferably an extruded core layer. The panel according to the present invention is preferably an extruded panel. It is imaginable that the panel is made via co-extrusion. In a possible embodiment, the core may comprise at least a natural material, a mineral material, a thermoplastic or thermosetting material, or a combination thereof. The natural material may comprise wood, engineered wood, a fibreboard such as medium-density fibreboard (MDF) or high-density fibreboard (HDF), green fibreboard, mycelium, and the like. The mineral material may comprise magnesium oxide (MgO), magnesium carbonate, magnesium chloride (MgCI), magnesium oxychloride (MOC), magnesium oxysulfate (MOS), Aluminium Trihydroxide (ATH), Magnesium Dihydroxide (MDH), phosphates, phosphinates, and / or phosphonates. It is also conceivable that the mineral material may comprise calcium carbonate (CaCO3), chalk, clay, calcium silicate, talc, and / or any other mineral material suitable for use in manufacturing decorative floor or wall panels. The use of at least one mineral material in the core layer is conceived to impart sufficient rigidity thereby ensuring dimensional stability of the panel. The thermoplastic material may comprise of at least a polyvinyl chloride (PVC), polystyrene (PS), polyethylene (PE), polyurethane (PU), polyethylene terephthalate (PET), polyethylene terephthalate glycol (PETg), acrylonitrile butadiene styrene (ABS), polypropylene (PP), phenolic, melamine or formaldehyde resins and / or any other thermoplastic or thermoplastic material suitable for use in manufacturing decorative building panels or floor panels. The use of at least one thermoplastic or thermosetting material in the core layer is conceived to impart flexibility characteristics to the floor panel when deemed necessary, for example when flexibility is required to achieve engagement of a locking mechanism. The core layer may also comprise a combination of any of the materials previously mentioned. It is conceivable that the composite material comprises at least 20% by weight of mineral material and / or 15%-40% by weight of thermoplastic or thermosetting material, more preferably at least 50% by weight of a mineral material, most preferably at least 70% by weight of a mineral material. This range is found to secure sufficient stability and strength of the core layer while also allowing for necessary flexibility thereof and improving temperature resistance as well. Different types of bevels can be included in a panel according to the present invention, for example, rounded bevels. Rounded bevels, of which a length (L) of an outer surface area of the bevel is definable by x = R x theta, have a crosssectional shape of a circular arc. Theta is defined as the central angle. If for example represents an individual arc length measurements and x is the mean length of the arc for a plurality of bevels of different panels, then theta is the smallest angle to ensure that only a 0.1mm height difference between two panels. The difference can thus largely depend on the radius of the circle (roundness of the bevel) and length of the arc. In case a rounded bevel is applied, the arc length is preferably chosen such that a projected height difference between two bevel edges of two different panels is 0.2 mm or less, more preferably 0.1 mm or less, most preferably 0.05 mm or less. Other possible bevels can include, square bevels. The stretching can then be determined via the perimeter of the square. However, also V-shaped bevels and / or U-shaped bevels are imaginable. V-shaped bevels can enclose an angle of more than 30 degrees, for example in the range of 35 degrees to 60 degrees, and preferably approximately 45 degrees. The angle can for example range from 2 degrees to 30 degrees, preferably from 4 to 15 degrees, and even more preferably 6 to 9 degrees. The depth of at least one bevel can for example range from 0.1 mm to 0.55 mm, from 0.2 mm to 0.35 mm, and more in particular from 0.5 mm to 3 mm, and even more in particular from 1.5 mm to 2.5 mm. U-shaped bevels can for example define a half-circle. It is alternatively also imaginable that at least one panel comprises at least one irregular or irregularly shaped bevel. In a possible embodiment, for example when applying irregular bevels, it is imaginable to consider the stretching material properties to determine the stretching of the beveled panel. For example, we can consider equation S = k*B, wherein S is the panel length stretching due to the (pressed) bevels, B is the length of the bevel, and k is the coefficient of proportionality. Parameter k can be a constant that represents how much the panel length stretches for a unit increase in bevel length. The value of k would depend on the material properties, the pressing process, and / or other relevant factors. Any of the embodiments described for the method according to the present invention apply to the panel, and vice versa. The invention also relates to a floor covering comprising a plurality of panels according to the present invention. The invention also relates to a plurality of panels according to the present invention. The invention in particular relates to a plurality of panels according to the present invention, wherein the stretching of at least one panel, and preferably each panel, is in a range of 0.01 % to 0.2% with respect to the predefined length or intended length. The amount of stretching can optionally be determined via any of the described examples. When it is referred to a preferred length also an intended length can be meant. The invention further relates to a system for producing a panel according to the present invention and / or a applying a method according to the present invention, said system comprising at least one sensor, at least one embossing roller and at least one control unit. The system can for example comprise at least one first sensor and at least one second sensor for determining a distance between stretching markers. The control unit can be connected to at least one sensor. The control unit can also be configured to apply any of the method steps according to the present invention. The invention will be further elucidated by means of the following non-limitative clauses. 1. Method for applying a surface structure onto a surface of a panel, in particular a floor, wall or ceiling panel, comprising the steps of: - providing at least one extruded core layer comprising an upper core surface and a bottom core surface; - laminating at least one decorative top layer onto the upper core surface of the core layer such that a laminated panel is formed; - applying a surface structure onto at least part of at least one surface of the laminated panel by guiding the laminated panel through a set of rollers comprising at least one embossing roller; wherein the core layer and / or the decorative top layer comprises a plurality of stretching markers, wherein the rotational speed of at least one embossing roller is determined and / or adjusted based upon a determined distance between at least two stretching markers, in particular at least two distinct stretching markers. 2. Method according to clause 1, wherein the rotational speed of at least one embossing roller is determined and / or adjusted such that the stretching of the laminated panel is in a range of 0.01% to 0.2%. 3. Method according to any of the previous clauses, wherein an initial distance between at least two stretching markers is determined prior to the embossing step and wherein a final distance between said two stretching markers is determined after the embossing step and wherein the rotational speed of at least one embossing roller is determined and / or adjusted based upon the difference between the final distance and the initial distance between said two stretching markers. 4. Method according to clause 3, wherein the rotational speed of at least one embossing roller is decreased when the final distance between said at least two stretching markers is larger than the initial distance between said two stretching markers and / or wherein the rotational speed of at least one embossing roller is increased when the final distance between said at least two stretching markers is smaller than the initial distance between said two stretching markers. 5. Method according to any of the previous clauses, wherein the distance between at least two stretching markers is determined via at least one sensor, in particular at least one optical sensor, at least one image sensor, at least one infrared sensor, at least one laser scanner, or combinations thereof. 6. Method according to any of the previous clauses, wherein the laminated panel is guided over multiple rollers, and wherein the circumference of at least one embossing roller is larger than a total length and / or width of the at least one decorative top layer, in particular wherein the circumference of at least one embossing roller is larger than a total print length of the at least one decorative top layer. 7. Method according to clause 6, wherein the circumference of at least one embossing roller is from 5% to 15% larger, most preferably at least 8% larger, than the length and / or width of the decorative top layer. 8. Method according to any of the previous clauses, wherein at least one embossing roller has a diameter in the range of 300 to 650 mm, preferably in the range of 350 to 500 mm, more preferably in the range of 400 to 650 mm. 9. Method according to any of the previous clauses, wherein a plurality of stretching markers is provided on at least one longitudinal edge of the core layer and / or the decorative top layer. 10. Method according to any of the previous clauses, wherein at least part of the plurality of stretching markers is provided at intervals in a range of 5 to 50 mm, preferably 10 to 40 mm, more preferably 15 to 25 mm in particular from center to center. 11. Method according to any of the previous clauses, wherein at least one embossing roller comprises at least one motor, preferably at least one servo motor, and wherein the rotational speed of the embossing roller can be controlled via the motor. 12. Method according to any of the previous clauses, wherein at least one embossing roller is configured to provide at least one embossing structure and / or at least one bevel. 13. Method according to any of the previous clauses, comprising the step of applying at least one bevel to the laminated panel by guiding the laminated panel over at least one bevel roller. 14. Method according to any of the previous clauses, wherein the plurality of stretching markers is provided on at least one longitudinal edge and / or lateral edge of the decorative top layer, and wherein the decorative top layer is preferably guided through a dancing roller system or dancer roller in order to maintain consistent tension in the film. 15. Method according to any of clauses 12 to 14, comprising the step of validating the position of the at least one bevel and determining and / or adjusting the rotational speed of at least one embossing roller and / or at least one bevel roller based upon the validated position of the at least one bevel. 16. Method according to any of the previous clauses, comprising the step of profiling and / or edging at least one side edge of at least one laminated panel. 17.    Method according to any of the previous clauses, wherein at least part of the laminated panel is heated prior to the embossing step. 18. Method according to any of the previous clauses, wherein the distance between at least two stretching markers defines a specific section of a pattern on the decorative top layer, and wherein a longitudinal difference in the surface structure is assessed by a disparity in distance or a variance in time between the identified predetermined section on each unit pattern of the decorative top layer and the identified corresponding part on the embossing roller associated with the corresponding predetermined section. 19. Method according to any of the previous clauses, wherein if the at least one stretching marker is identified as being ahead of another stretching marker, the feeding tension of the at least one decorative top layer is increased to extend its stretching length before rolling. 20. Method according to any of the previous clauses, comprising wherein tension control the decorative top layer is applied in case a longitudinal discrepancy between the embossed design on the embossing roller and the corresponding pattern on the decorative top layer is detected. 21. Panel, in particular a floor, wall or ceiling panel, obtained via a method according to any of the previous clauses, said panel comprising at least one core layer comprising an upper core surface and a bottom core surface and at least one decorative top layer laminated onto the upper core surface of the core layer, wherein at least one surface of the panel comprises a surface structure and wherein at least one edge of the panel comprises a bevel. 22. Panel according to clause 21, wherein the surface structure comprises an embossing structure and / or at least one bevel. 23. Panel according to clause 21 or clause 22, wherein at least one bevel is provided on at least one side edge of the panel and / or wherein a bevel is provided on at least two opposing side edges of the panel. 24. Panel according to any of clauses 21 to 23, wherein at least one bevel has a linear shape such that the bevels of at least two adjacent panels form a V-shape or wherein at least one bevel has a convex shape such that the bevels of two adjacent panels form a U-shape, or at least one bevel has a concave shape such that the bevels of two adjacent panels form a rounded V-shape. 25. Panel according to any of clauses 21 to 24, wherein an upper surface of the panel comprises at least two opposing bevels posited at a distance from at least one lateral edge of the panel and / or wherein a length variation of the panel, in particular a horizontal projected length variation between two opposing pressed bevels, is smaller than L2max l-2min = [arccosine(H2min / R) - arccosine(H2max / R)] for (H2imax " H2,min) < 0.1mm. 26. Panel according to any of clauses 21 to 25, wherein at least one decorative top layer comprises at least one decor layer and / or at least one transparent wear layer. 27. Panel according to any of clauses 21 to 26, wherein at least one decorative top layer comprises at least one layer selected from the group of: a PVC decorative film, a PP decorative film, a PET decorative film, a stone veneer and / or a wood veneer. 28. Panel according to any of clauses 21 to 27, wherein at least part of the surface structure comprises a tactile texture of at least 0.1 mm depth. 29. Panel according to any of clauses 21 to 28, wherein a length deviation between two opposing pressed bevels, in particular a deviation of projected horizontal length of a bevel, ranges between +0.5% to -0.5% of a predefined length between said bevels. 30. Panel, according to any of clauses 21 to 29, wherein the bevel is a pressed bevel, and, wherein a standard deviation of projected vertical heights of a plurality of pressed bevel of different panels is expressed by s, and wherein this s is less than or equal to 0.036 mm. 31. Panel according to clause 30, wherein a distance between the pressed bevel of a first panel and the pressed bevel of an opposing second panel is expressed by Lpb, and wherein a tolerance or variation of Lpb is expressed by Lpd,Var and wherein Lpb,var = Lpb,nom + / - [arccosine((Hs-0.05) / R) - arccosine((Hs+0.05) / R)] / 2. 32. Panel according to any of clauses 21 to 31, wherein an absolute projected vertical height difference between a bevel edge located on a side surface of a first panel and a bevel edge located on a side surface of a second panel is at most 0.05mm. 33. Plurality of panels according to any of clauses 21 to 32, wherein a variation, absolute deviation, or tolerance of a length of each panel of the plurality of panels is at most 0.01%. 34. Plurality of panels according to clause 33, wherein the stretching of at least one panel, and preferably each panel, is in a range of 0.01% to 0.2%, and preferably at most 0.1%with respect to a predefined length of each panel and / or wherein a length deviation and / or thickness deviation, or variance, between at least two panels is in the range of 0.005% to 0.2% and preferably at most 0.01%. The invention will be further elucidated by means of non-limiting exemplary embodiments illustrated in the following figures, in which: - figure 1 shows a possible embodiment of a panel according to the present invention provided with stretching markers; - figure 2 shows a visualization of the method according to the present invention; - figure 3 shows a more detailed example of a visualization of the method according to the present invention; - figure 4 shows a perspective view of a system performing the method according to the present invention; - figures 5a and 5b show respectively a cross sectional view of a panel according to the prior art and a panel according to the present invention; and - figures 6a and 6b show a cross sectional view of respectively conventional panels and panels according to the present invention as obtained by applying the method according to the present invention; - figure 7 shows a cross sectional view of the bevel edges on the panels; and - figure 8 shows a schematic representation of the method according to the present invention. Within these figures, similar reference numbers correspond to similar or equivalent elements or features. Figure 1 shows a schematic representation of a top view of a possible embodiment of a panel 101 according to the present invention provided with stretching markers S. The figure shows only part of the panel 101. The figures show that the distance D between adjacent stretching markers S is not consistent. In case the stretching markers S where consistently applied, the irregular intervals of the stretching markers S are an indication that the panel 101 is stretched during the pressing / embossing step. The panel further shows an initial stretching marker Si indicating a distal end of the panel where the panel can be cut. The panel 101 comprises a decorative top layer 110 provided with a wood print. The panel 101 preferably comprises at least one (extruded) core layer comprising at least one thermoplastic composite material having a Vicat softening temperature of at least 80 degrees Celsius. The panel preferably also comprises at least one decorative top layer having a Vicat softening temperature of at most 70 degrees Celsius. Figure 2 shows a schematic representation of the method according to the present invention. The method makes use of a system 100 for applying a surface structure onto a surface of a panel 101. The figure shows a side view of the system 100. The figure schematically shows a panel 101 which comprises a core layer and a decorative top layer wherein the core layer and / or the decorative top layer comprises a plurality of stretching markers S, for example as shown in figure 1. The detailed parts of figure 2 indicatively show the presence of the stretching markers S at an edge of the panel 101 seen from a top view. The system 100 comprises an embossing roller 102 configured for applying a surface structure A onto at least part of at least one surface of the laminated panel 101 by guiding the laminated panel 101 over the embossing roller 102. The embossing roller 102 comprises a texture 102A which is transferred to the panel 101. An initial distance Di between at least two stretching markers S is determined prior to the pressing or embossing step by a first sensor 103. A final distance Df between said two stretching markers S is determined after the pressing / embossing step by a second sensor 104. The embossing roller 102 comprises a (servo) motor 105 for driving said embossing roller 102. Based on the difference between the initial distance Di and the final distance Df between the stretching markers S on the panel 101, the rotational speed of the embossing roller 102 can be adjusted. The system 100 can therefore make use of a control unit 106 configured to activate and / or control the motor 105 based on the information obtained by the first sensor 103 and the second sensor 104. The system 100 can further comprise a validation unit 107 which validates the determined data. The validation unit 107 can also be configured to visualize the data. Figure 3 shows a more detailed example of a system 200 according to the present invention, applying a method according to the present invention. The system shows a (laminated) panel 201 coming out of an extruder 250 and which panel 201 is guided through the system 200. The direction of the panel 201, or in particular the board which can be cut into panels 201, is indicated with an arrow. The system 200 comprises multiple rollers whereover the panel 201 is guided. A first pair of rollers 251 A, 251B is for example configured to define the thickness of the panel 201. At least one of the rollers can be configured to heat the panel 201. The panel 201 is guided over an embossing roller 202 comprises a (servo) motor 205 for driving said embossing roller 202. Prior the panel 201 being guided over the embossing roller 202, the panel 201 is guided over a further roller 240. The embossing roller 202 is slightly bigger than the further roller 240. The embossing roller 202 is preferably at most 5% bigger than the further roller 240. The embossing roller 202 being slightly bigger than the further roller 240 positively contributes to the control of the stretching. The system 200 further comprises a first sensor 203 and a second sensor 204 for determining respectively an initial distance and a final distance between at least two stretching markers of the panel 201 and / or to control the position of at least one (pressed) bevel, if applied. Figure 4 shows a perspective view of a system 300 according to the present invention performing the method according to the present invention. The figure shows a perspective view. The system 300 comprises an embossing roller 302 configured to apply a surface structure upon the panel 301. The panel 301 which comprises a core layer and a decorative top layer comprises a plurality of stretching markers S provided at an edge of the panel 301. An initial distance between at least two stretching markers S is determined prior to the pressing / embossing step by a first sensor 303 and a final distance between said two stretching markers S is determined after the pressing / embossing step by a second sensor 304. The rotational speed of the embossing roller 302 can be adjusted based upon the determined distance. Figures 5a and 5b show a cross sectional view of respectively a panel 40 according to the prior art (figure 5a) and a panel 400 according to the present invention (figure 5b) as obtained by applying the method according to the present invention. Figure 5a shows the panel 40 being provided with multiple bevels B1, B2, B3, B4. The distance between adjacent bevels B1, B2, B3, B4 is inconsistent. The distance between the first bevel B1 and the second bevel is smaller than the distance between the third bevel B3 and the fourth bevel B4. Figure 5b shows that the bevels B of the panel 400 are equally spaced apart. The thickness Ti of the panel 400 according to the present invention will be slightly bigger than the thickness Tp of the panel 40 according to the prior art, due to the panel 40 according to the prior art being subjected to a higher amount of stretching. Figure 6a shows a cross sectional view of respectively a first conventional panel 50a and a second conventional panel 50b. Figure 6b shows a first panel 500a and a second panel 500b according to the present invention as obtained by applying the method according to the present invention. The first conventional panel 50a and the second conventional panel 50b are provided with a bevel B1 in between, with bevel heights H1 and H2, respectively, having different values. Figure 6b shows that the bevel heights H on bevel B of the first panel 500a and the second panel 500b are equal, influenced by equal panel lengths. The bevel heights H of the panels 500a and 500b according to the present invention have a lower variance. Figure 7 shows a cross sectional view of two adjacent pressed bevels being provided with projected bevel heights Hi and H2, an arc of a circle with radius R, cut-off points pi and p2 identifying at least one outer edge of a bevel after profiling, and corresponding angles oil and a2. Figure 8 shows a possible production line and process for applying a method for applying a surface structure onto a surface of a panel, in particular a floor, wall or ceiling panel, in particular according to the present invention. Figure 8 depicts a production line and process for applying a surface structure onto a panel, particularly a floor, wall, or ceiling panel. The process line comprises multiple sections A-G and can be referred to as an extruder-laminator. The first section A of the system comprises an extruder 250. A panel 201, or at least a core layer thereof is the produced by the extruder 250. The extruder 250 is comparable to the extruder shown in Figure 3 and in comprises in a preferred embodiment at least one infeed, at least one barrel and at least two counter-rotating twin screws connected to at least one clotheshanger die to form a continuously extruded core or substrate comprising a thermoplastic composite, which in some embodiments may be foamed. The second section is the laminator section B which comprises a laminating device where a heating device 208, connected to a nip roller pair 251A and 251B, maintains the panel 201 at an elevated temperature while defining its thickness and a laminating nip roller pair 252A and 252B receives at least one thermoplastic foil (f), such as a decorative film and / or transparent wear layer from infeed rollers 209A and 209B to continuously press the layers together, forming a laminated panel comprising a decorative top layer. Following lamination, the panel 201 moves to the first embossing device 270 which applies a primary surface texture, preferably an Embossing In Register (EIR). This device includes an embossing roller 202 that creates a texture on the panel surface, with a texture depth that is typically less than the thickness of the decorative layer, having a minimum depth of 0.10 mm, and preferably 0.15 mm or 0.20 mm. A sensor 203, connected to a servo 205, is used to measure the distance between stretching markers on the panel, such as on the decorative top layer, which in turn controls the rotational speed of the embossing roller 202. A cooling device or chiller 206 is connected to the embossing roller 202 for cooling said roller 202, maintaining at a temperature preferably at least 20 degrees Celsius below the Vicat softening temperature of the decorative top layer, with the temperature of the embossing roller 202 ranging from 0-50 degrees Celsius, and more preferably between 5-30 or 10-20 degrees Celsius, allowing for a pronounced, deep texture with a controlled rebound. A back roller 207, with a Shore A hardness of 50-70, supports the panel, ensuring even force distribution during the embossing process. The panel may then proceed to a secondary structuring section C, which applies a secondary surface structure, such as a bevel. This section contains an embossing roller 212, a sensor 213 connected to a servo 215 for process control, and a heating device 216 to heat the embossing roller for beveling, with the temperature of the embossing roller possibly exceeding the Vicat softening temperature of the decorative top layer, preferably the core, by at least 10 degrees Celsius. A back roller 217 supports the panel during the second embossing process. Alternatively, a traveling press 290 may be provided as second embossing device in the secondary structuring section C. This press 290 comprises a sensor 213 connected to a positioning device 218, which includes guide rails (to number) to move said press synchronously with the speed of the panel extrusion. A press plate 214 then imparts at least a secondary texture, preferably a bevel onto the panel under a pressure provided by a plurality of hydraulic cylinders (to number). The system employs stretching markers and sensors to adjust the embossing and beveling processes, thus ensuring consistent surface structures and dimensions and minimizing length variation between two opposing pressed bevels. The method also ensures a controlled stretching of the panel, typically in the range of 0.01% to 0.2%. Said secondary texture, applied by secondary embossing device 280 and / or 290 preferably comprises at least one positioning marker. Following the application of a primary surface texture, the panel progresses to a secondary embossing device 280 and / or 290 applies a secondary texture, which secondary texture preferably comprises at least one bevel and preferably at least one positioning marker. Said laminator 260, along with the embossing devices 270, 280 and / or 290, form a laminating-embossing device 200. The laminating-embossing device 200 is followed by a cutting section D comprising at least one cutting device 300, which incorporates a sensor 223 for detecting positioning markers, a positioning device, and at least one cutting blade 224 to separate the laminated and embossed sheet into individual boards. After cutting, the boards move to an UV curing section E comprising at least one UV device 400, which includes a conveyer (440) for transporting the embossed boards, a bottom UV applicator (441), a top UV applicator (442), and a plurality of UV- and / or Excimer curing units (443). Said UV device ensures the curing of any coatings applied to the board. The conveyor 440 may extend over the further sections of the process line. Finally, the boards proceed to a separating and edging sections F, G. The production line comprises thereto a device 500, which is equipped with at least one sensor 233 to sense said at least one, preferably said plurality of positioning markers, at least one positioning device (550), a plurality of blades (551) for separating the board into strips or planks, and a double end tenoner (552) to provide intercoupling means on at least one opposing side edge of the panel. The positioning markers enable the accurate cutting, sawing, or separation of the laminated panel into boards, strips and / or planks, ensuring accurate separation and the creation of interlocking mechanisms on the panels, allowing for easy assembly and allows for accurate cutting and profiling without height differences. The system as a whole facilitates the production of decorative panels with precise surface structures, dimensions, and interlocking features, while minimizing stretching, height differences and misalignments. It will be clear that the invention is not limited to the exemplary embodiments which 5 are illustrated and described here, but that countless variants are possible within the framework of the attached claims, which will be obvious to the person skilled in the art. In this case, it is conceivable for different inventive concepts and / or technical measures of the above-described variant embodiments to be completely or partly combined without departing from the inventive idea described in the 10 attached claims. The verb 'comprise' and its conjugations as used in this patent document are understood to mean not only 'comprise', but to also include the expressions 'contain', 'substantially contain', 'formed by' and conjugations thereof. 15

Claims

1. Method for applying a surface structure onto a surface of a panel, in particular a floor, wall or ceiling panel, comprising the steps of:- providing at least one extruded core layer comprising an upper core surface and a bottom core surface, wherein the at least one extruded core layer comprises at least one thermoplastic composite material having a Vicat softening temperature of at least 80 degrees Celsius;- laminating at least one decorative top layer onto the upper core surface of the core layer such that a laminated panel is formed, wherein at least part of the at least one decorative top layer has a Vicat softening temperature of at most 70 degrees Celsius;- applying at least one surface structure onto at least part of at least one surface of the laminated panel by subjecting the laminated panel to at least one pressing step by means of:o at least one embossing roller and / or o at least one press plate.

2. Method according to claim 1, wherein the temperature of at least one embossing roller is at least 20 degrees Celsius below the Vicat softening temperature of the at least one decorative top layer.

3. Method according to claim 1 or 2, wherein the temperature of at least one press plate is at least 10 degrees Celsius above the Vicat softening temperature of the at least one decorative top layer and / or the at least one core layer.

4. Method according to any of the previous claims, wherein at least one embossing roller and / or at least one press plate is cooled and / or heated to achieve the desired temperature during at least one pressing step.

5. Method according to any of the previous claims, wherein the core layer and / or the decorative top layer comprises a plurality of stretching markers, wherein the rotational speed of at least one embossing roller is determined and / or adjusted based upon a determined distance between at least two stretching markers, in particular at least two distinct stretching markers.

6. Method according to claim 5, wherein the rotational speed of at least one embossing roller is determined and / or adjusted such that the stretching of the laminated panel is in a range of 0.01% to 0.2%.

7. Method according to any of claims 5-6, wherein an initial distance between at least two stretching markers is determined prior to at least one pressing step and wherein a final distance between said two stretching markers is determined after the at least one pressing step and wherein the rotational speed of at least one embossing roller is determined and / or adjusted based upon the difference between the final distance and the initial distance between said two stretching markers.

8. Method according to claim 7, wherein the rotational speed of at least one embossing roller is decreased when the final distance between said at least two stretching markers is larger than the initial distance between said two stretching markers and / or wherein the rotational speed of at least one embossing roller is increased when the final distance between said at least two stretching markers is smaller than the initial distance between said two stretching markers.

9. Method according to any of claims 5-8, wherein the distance between at least two stretching markers is determined via at least one sensor, in particular at least one optical sensor, at least one image sensor, at least one infrared sensor, at least one laser scanner, or combinations thereof.

10. Method according to any of claims 5-9, wherein a plurality of stretching markers is provided on at least one longitudinal edge of the core layer and / or the decorative top layer.

11. Method according to any of claims 5-10, wherein at least part of the plurality of stretching markers is provided at intervals in a range of 5 to 50 mm, preferably 10 to 40 mm, more preferably 15 to 25 mm in particular from center to center.

12. Method according to any of claims 5-11, wherein the distance between at least two stretching markers defines a specific section of a pattern on the decorative top layer, and wherein a longitudinal difference in the surface structure is assessed by a disparity in distance or a variance in time between the identifiedpredetermined section on each unit pattern of the decorative top layer and the identified corresponding part on the embossing roller associated with the corresponding predetermined section.

13. Method according to any of claims 5-12, wherein a first plurality of stretching markers is provided on a first longitudinal edge of the core layer and / or the decorative top layer and a second plurality of stretching markers is provided on a second longitudinal edge of the core layer and / or the decorative top layer.

14. Method according to any of the previous claims, wherein the laminated panel is guided over multiple rollers, and wherein the circumference of at least one embossing roller is larger than a total length and / or width of the at least one decorative top layer, in particular wherein the circumference of at least one embossing roller is larger than a total print length of the at least one decorative top layer.

15. Method according to claim 14, wherein the circumference of at least one embossing roller is from 5% to 15% larger, most preferably at least 8% larger, than the length and / or width of the decorative top layer.

16. Method according to any of the previous claims, wherein at least one embossing roller has a diameter in the range of 300 to 650 mm, preferably in the range of 350 to 500 mm, more preferably in the range of 400 to 650 mm.

17. Method according to any of the previous claims, wherein at least one embossing roller comprises at least one motor, preferably at least one servo motor, and wherein the rotational speed of the embossing roller can be controlled via the motor.

18. Method according to any of the previous claims, wherein at least one embossing roller is configured to provide at least one embossing structure and at least one bevel, wherein the temperature of at least one embossing roller is at least 10 degrees Celsius above the Vicat softening temperature of the at least one decorative top layer.

19. Method according to any of the previous claims, comprising the step of applying at least one bevel to the laminated panel during at least one pressing step, wherein the at least one press plate is provided in a traveling press.

20. Method according to any of the previous claims, comprising the step of validating the position of the at least one bevel and determining and / or adjusting the rotational speed of at least one embossing roller and / or at least one bevel roller based upon the validated position of the at least one bevel.

21. Method according to any of the previous claims, comprising the step of profiling and / or edging at least one side edge of at least one laminated panel.

22. Method according to any of the previous claims, wherein at least part of the laminated panel is heated prior to at least one pressing step.

23. Method according to any of the previous claims, comprising wherein tension control the decorative top layer is applied in case a longitudinal discrepancy between the embossed design on the embossing roller and the corresponding pattern on the decorative top layer is detected.

24. Method according to any of the previous claims, comprising the step of providing at least one positioning marker by means of at least one embossing roller and / or embossing press plate.

25. Method according to any the previous claims, wherein at least one embossing roller provides at least one texture or embossing synchronized with the decorative design on the decorative top layer and at least one press plate provides at least one bevel structure.

26. Panel, in particular a floor, wall or ceiling panel, in particular obtained via a method according to any of the previous claims, said panel comprising at least one core layer comprising an upper core surface and a bottom core surface and at least one decorative top layer laminated onto the upper core surface of the core layer, wherein at least one surface of the panel comprises a surface structure wherein the maximum texture depth of the surface structure is less than the total thickness ofthe decorative top layer and wherein the panel, preferably at least one edge of the panel, comprises at least one bevel wherein the minimum depth of at least one bevel is greater than the total thickness of the decorative top layer.

27. Panel according to claim 26, wherein the at least one core layer comprises at least one thermoplastic composite material having a Vicat softening temperature of at least 80 degrees Celsius and / or wherein at least part of the at least one decorative top layer has a Vicat softening temperature of at most 70 degrees Celsius.

28. Panel according to claim 26 or claim 27, wherein at least one bevel is provided on at least one side edge of the panel and / or wherein at least two bevels are provided on at least two opposing side edges of the panel.

29. Panel according to any of claims 26-28, wherein at least one bevel has a linear shape such that the bevels of at least two adjacent panels form a V-shape or wherein at least one bevel has a convex shape such that the bevels of two adjacent panels form a U-shape, or at least one bevel has a concave shape such that the bevels of two adjacent panels form a rounded V-shape.

30. Panel according to any of claims 26-29, wherein an upper surface of the panel comprises at least two opposing bevels posited at a distance from at least one lateral edge of the panel and / or wherein a length variation of the panel, in particular a horizontal projected length variation between two opposing pressed bevels, is smaller than L2max l-2min = [arccosine(H2min / R) - arccosine(H2max / R)] for (H2 max “ H2imin) < 0.1mm.

31. Panel according to any of claims 26-30, wherein at least one decorative top layer comprises at least one decor layer and / or at least one transparent wear layer.

32. Panel according to any of claims 26-31, wherein at least one decorative top layer comprises at least one layer selected from the group of: a PVC decorative film, a PP decorative film, a PET decorative film, a stone veneer and / or a woodveneer.

33. Panel according to any of claims 26-32, wherein at least part of the surface structure comprises a tactile texture of at least 0.1 mm depth, preferably at least 0.15 mm, more preferably at least 0.20 mm.

34. Panel according to any of claims 26-33, wherein a length deviation between two opposing pressed bevels, in particular a deviation of projected horizontal length of a bevel, ranges between +0.5% to -0.5% of a predefined length between said bevels.

35. Panel, according to any of claims 26-34, wherein the bevel is a pressed bevel, and, wherein a standard deviation of projected vertical heights of a plurality of pressed bevel of different panels is expressed by s, and wherein this s is less than or equal to 0.036 mm.

36. Panel according to claim 35, wherein a distance between the pressed bevel of a first panel and the pressed bevel of an opposing second panel is expressed by Lpb, andwherein a tolerance or variation of Lpb is expressed by Lpd,var and wherein Lpb,var = Lpb,nom + / - [arccosine((Hs-0.05) / R) - arccosine((Hs+0.05) / R)] / 2.

37. Panel according to any of claims 26-36, wherein an absolute projected vertical height difference between a bevel edge located on a side surface of a first panel and a bevel edge located on a side surface of a second panel is at most 0.05mm.

38. Plurality of panels according to any of claims 26-37, wherein a variation, absolute deviation, or tolerance of a length of each panel of the plurality of panels is at most 0.01%.

39. Plurality of panels according to claim 38, wherein the stretching of at least one panel, and preferably each panel, is in a range of 0.01% to 0.2%, and preferably at most 0.1%with respect to a predefined length of each panel and / or wherein a length deviation and / or thickness deviation, or variance, between at least two panels is in the range of 0.005% to 0.2% and preferably at most 0.01%.

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