Method and device for producing a film body, film body, method for producing a layer composite, layer composite, method for producing a heating film composite, heating film composite, and device

Abstract

The invention relates to a method for producing a film body (100), to a film body (100), to a layer composite (2), and to a device for producing a film body (100). The film body (100) comprises at least one carrier film (20), at least one decorative layer (22, 23), and at least one heating wire (21) with a minimum width and / or a minimum diameter of 50 µm and a minimum cross-sectional surface area of 2500 µm2 and / or a multi-wire heating line (9) comprising at least one heating wire (21) and one or more additional heating wires (211, 212, 213, 214). The at least one heating wire (21) and the one or more additional heating wires (211, 212, 213, 214) are provided so as to be at least partly galvanically isolated from one another, and the at least one decorative layer is optional in the case of the multi-wire heating line (9). The components of the film body are provided with a first support component (1) in the film body (100) and with a second support component (3) on a visible face (101).

Description

[0001] Method and device for producing a film body, film body, method for producing a layered composite, layered composite, method for producing a heating film composite, heating film composite and device

[0002] The invention relates to a method for producing a film body, a method for producing a layered composite, a method for producing a heating film composite, a device for producing a film body and a film body, a heating film composite and a layered composite.

[0003] It is known to use decorative coverings for vehicle components with transparent metal layers to heat surfaces. Such metal layers can be vapor-deposited in a thin layer. On the one hand, the thin layer of vapor deposition allows the transmission of electromagnetic waves from the radiation sources covered by it. On the other hand, however, the heating output is limited by the low vapor deposition. However, due to the increasing use of light sources with very low heat output, which are also located in positions exposed to adverse weather conditions, such as LED headlights with and without integrated radar devices in the front area of ​​vehicles, the requirements for the design of these heaters are increasing.To ultimately achieve the desired heating effect, large-area heating expansions based on thin metal layers or even long heating tracks extending into the areas to be heated may be necessary. This, in turn, increases manufacturing tolerances and increases the possibility of delamination of these metal layers or long heating tracks, particularly in molded part areas subject to high mechanical stress. This can limit design options, such as the use of additional layers to decorate the cover. Such products are therefore relatively fragile, the production of reliable products is complex, and the possible applications in terms of heating performance and integration into an overall decorative concept are limited.

[0004] Heating devices for other applications, for example with a pure heating function without decoration, can negatively influence the permeability for certain electromagnetic waves and optical properties because they are opaque and / or reflective due to the materials used and / or large dimensions, for example for the radiation from radar devices or the light beams from headlights.

[0005] It is therefore an object of the invention to provide improved possibilities for heatable covers, as well as for a method and for a device for producing heatable covers.

[0006] The object is achieved by means of a method for producing a film body according to claim 1, a method for producing a layered composite according to claim 18, a layered composite according to claim 38, a method for producing a heating film composite according to claim 17, a heating film composite according to claim 37, a film body according to claim 48 and a device according to claim 49.

[0007] The object is achieved by a method for producing a film body with a heatable surface of a cover element which is permeable in particular to electromagnetic waves, comprising the following steps, in particular in the specified order: a) Providing at least one carrier film, at least one decorative layer and at least one heating wire, wherein the at least one heating wire has a minimum width and / or a smallest diameter of 50 pm and a minimum cross-sectional area of ​​2500 pm 2has and / or providing: at least one carrier film, optionally at least one decorative layer, and a multi-core heating cable comprising at least one heating wire and one or more further heating wires, wherein the at least one heating wire and the one or more further heating wires are at least partially galvanically separated from one another, b) back-injection or back-flooding of the at least one carrier film and / or the at least one heating wire and / or the at least one decorative layer with a first flowable composition to obtain a first carrier component of the film body; c) applying at least a second flowable composition to a front side starting from the at least one carrier film to obtain a second carrier component and / or a protective lacquer layer on a visible side of the film body.

[0008] The object is further achieved by a method for producing a layered composite, in particular in the form of an insert element, preferably for use in the method for producing the film body. The method for producing the layered composite comprises the steps: i) providing at least one carrier film, ii) providing at least one decorative layer, and iii) providing at least one heating wire with a minimum width and / or a smallest diameter of 50 μm and a minimum cross-sectional area of ​​2500 μm. 2and / or a multi-core heating cable comprising at least one heating wire and one or more further heating wires, wherein the at least one heating wire and the one or more further heating wires are at least partially galvanically separated from one another, iv) connecting, preferably by material bonding, the at least one carrier film, the at least one decorative layer and the at least one heating wire. Preferably, the method for producing the layered composite or one or more steps thereof is carried out in the method for producing the film body, in particular before step a) or as one or more substeps of step a) and / or of step b) and / or of step c).

[0009] The object is further achieved by a layered composite, in particular in the form of an insert element, preferably produced by the method for producing a layered composite and / or for use in a method for producing a film body. The layered composite comprises: at least one carrier film, at least one decorative layer, and at least one heating wire with a minimum width and / or a smallest diameter of 50 μm and a minimum cross-sectional area of ​​2500 μm. 2 and / or a multi-core heating cable comprising at least one heating wire and one or more further heating wires, wherein the at least one heating wire and the one or more further heating wires are at least partially galvanically separated from one another, wherein the at least one carrier film, the at least one decorative layer and the at least one heating wire are connected, preferably integrally connected.

[0010] The problem is further solved by a method for producing a heating foil composite. The method for producing the composite comprises the following steps:

[0011] I) Providing at least one carrier film,

[0012] II) optionally providing at least one decorative layer,

[0013] III) Providing a multi-core heating cable comprising at least one heating wire and one or more further heating wires, wherein the at least one heating wire and the one or more further heating wires are at least partially galvanically separated from one another,

[0014] IV) Connecting, preferably by material bonding, the at least one carrier film and the multi-core heating cable and optionally the at least one decorative layer.

[0015] The object is further achieved by a heating foil composite comprising at least one carrier foil and a multi-core heating cable. The multi-core heating cable comprises at least one heating wire and one or more additional heating wires, wherein the at least one heating wire and the one or more additional heating wires are at least partially galvanically isolated from one another. Optionally, the heating foil composite comprises at least one decorative layer. The at least one carrier foil and the at least one heating wire, and optionally the at least one decorative layer, are connected, preferably bonded.

[0016] The heating foil composite is in particular in the form of an insert element. Preferably, the heating foil composite, in particular as an insert element, serves for use in a process for producing the foil body and / or in a process for producing the layered composite and / or is suitable for this purpose. The heating foil composite can be a composite referred to as the first composite.

[0017] The object is achieved by a film body, in particular produced according to the method for producing the film body and / or preferably the method for producing the layered composite and / or the method for producing the heating film composite, in particular the first composite. The film body has a heatable surface of a cover element that is particularly permeable to electromagnetic radiation and comprises at least one carrier film, at least one decorative layer and at least one heating wire with a minimum width and / or a smallest diameter of 50 μm and a minimum cross-sectional area of ​​2500 μm. 2and / or the film body comprises at least one carrier film, optionally comprises at least one decorative layer, and comprises a multi-core heating cable. The multi-core heating cable comprises at least one heating wire and one or more further heating wires, wherein the at least one heating wire and the one or more further heating wires are at least partially galvanically isolated from one another. In particular, the film body comprises the layer composite according to the invention and / or the heating film composite according to the invention, preferably the first composite. In addition, the film body comprises a first carrier component and a second carrier component and / or a protective lacquer layer, wherein the second carrier component and / or the protective lacquer layer are formed on a visible side of the film body.

[0018] The object is achieved by a device, in particular an injection molding device, preferably for carrying out the method for producing the film body. The device comprises:

[0019] Means for forming a cavity. The means for forming a cavity have at least a first tool mold and a second tool mold, which can be placed in a closed state, in which the cavity is formed by at least the first tool mold and the second tool mold. The at least one first tool mold and a second tool mold are preferably designed such that an insert element, in particular the layer composite, can be arranged in the cavity in the closed state and can be coated by means of the first flowable composition, in particular in a first free space, and / or by means of the second flowable composition, in particular in a second free space.

[0020] Means for forming a defined gap adjoining the cavity. The means for forming the defined gap adjoining the cavity have at least a first gap shape and a second gap shape, wherein the gap is formed in the closed state by at least the first gap shape and the second gap shape. At least one of the first gap shape and the second gap shape is connected to the first tool mold and / or to the second tool mold via a detachable connecting element. The gap is designed in particular such that a partial region of an insert element, in particular the contacting element, preferably of the layer composite, can be led out of the cavity in the closed state.

[0021] This results in a film body that can provide a particularly powerful heating function using the heating wire and / or the multi-core heating cable. At the same time, improved heat distribution can be achieved, particularly due to the embedding of the heating wire and / or the multi-core heating cable within a preferably closed plastic body. This can improve the reliability of the sensor technology for distance measurements in adverse weather conditions, for example, and enable rapid and even illumination of the roadway during initial operation of headlights. This allows for a high degree of flexibility in decorative options.

[0022] It is particularly possible to provide optionally existing layers of the film body and / or the layer composite and / or the heating film composite as well as the second carrier component, which are arranged between the surface to be heated and the heating wire, with decorative elements and at the same time to design them in an optimized manner with regard to heat distribution, so that the heat is distributed in the second carrier component in such a way that a more uniform heating of the surface to be heated on the visible side is achieved. This also improves the design options for the film body, in particular for the second carrier component on the visible side, for example if the surface of the visible side is to be at a greater distance from the heating wire. Furthermore, by means of the at least one decorative layer, the heating function can be concealed from the observer, integrated into the design, or visibly highlighted.It is also possible to use the multiple heating wires of the multi-core heating cable to achieve sufficient heating output with inexpensive materials (e.g., those with a high copper content), while simultaneously using the multiple heating wires for special decorative effects. For example, the multi-core heating cable can have a surface structure formed by the heating wires and / or by sheath layers that each enclose a heating wire. Furthermore, the multi-core heating cable offers a wide range of possibilities for visibly arranging special color effects within the foil body.For example, multiple sheath layers, such as differently colored baked enamel layers, can be provided around the individual heating wires and formed in such a way that the heating cable has a locally iridescent color effect and / or locally iridescent brightness effect and / or shows different colors at different viewing angles. In addition, the arrangement of the heating wires relative to one another can be used to achieve other special optical effects, e.g. by means of parallel, twisted and / or curved heating wires. Furthermore, the multiple heating wires can result in better visibility compared to a single heating wire in that a larger contiguous area is occupied by the multi-core heating cable. Furthermore, the sheath layers or other layers with which the heating wire is provided can be further processed, for example using a laser.This can, for example, simplify the customization of a decor, improve setup times, and / or reduce batch sizes. Adequate heating output can be ensured, particularly when using copper, despite its low specific resistance, by specifically adjusting the total resistance of the multi-core heating cable. For this purpose, the number of heating wires, the structure and cross-section of the multi-core heating cable, as well as the diameter of the individual heating wires can be adjusted and optimized, particularly according to the requirements of the final film body. The multi-core heating cable thus offers a wide range of adjustment options with regard to heating output and decorative effects.

[0023] Advantageously, it is particularly possible in the film body to achieve a special decorative function while simultaneously providing sufficient heating power by means of the at least one heating wire in combination with the at least one decorative layer and also by means of the multi-core heating cable. A further advantage of the multi-core heating cable is that it can be designed as a particularly flexible cable, which enables simplified application to the at least one carrier film and / or application with complex geometries. A further advantage of the multi-core heating cable can be seen in an enlarged surface area compared to a single heating wire, which can, for example, improve the adhesion of the embedded heating cable in the film body.

[0024] In addition, a particularly robust film body can be provided. This makes it possible for the film body to have comparatively low elasticity, which means that the heating wire contained therein is only exposed to minimal bending stresses or vibrations. Furthermore, the surface area of ​​the heating wire can be designed to be comparatively small compared to its volume. This reduces the likelihood of, for example, delamination of adjacent layers in an interface region, as well as subsequent moisture formation and corrosion. Furthermore, despite a comparatively irregular material distribution in the film body, the relatively large heating wire areas allow for the formation of adhesive bridges, which at the same time enable optimal permeability for corresponding electromagnetic waves.

[0025] Due to the detachable connection of the device, it is advantageously possible, by adjusting or replacing the first gap shape, to exert a defined, sufficient pressure on an element of a component to be back-injected, in particular of the layered composite, guided through the gap in a compact design. This allows an area of ​​the component, in particular of the layered composite, to be free of injection molding compound without being damaged by, for example, one of the molds. At the same time, it can be ensured that no material escapes from the cavity through the gap during injection molding, i.e., no "blowout" occurs.

[0026] The film body is obtainable in particular by the process for producing a film body and preferably has the features obtainable by the process for producing a film body. The layered composite is obtainable in particular by the process for producing a layered composite and preferably has the features obtainable by the process for producing a layered composite. The heating film composite, preferably the first composite, is obtainable in particular by the process for producing a heating film composite and preferably has the features obtainable by the process for producing a composite. The film body preferably has the layered composite and / or the heating film composite. The layered composite is preferably used or provided in the process for producing a film body.It is also possible for process steps of the process for producing the layered composite to be carried out in the process for producing a film body. For example, it is possible for the steps of the process for producing the layered composite to be carried out in or before step a) or in step b) or in step c). It is also possible for the film body to have the features obtainable by the process for producing a layered composite. Preferably, the process for producing the heating film composite or one or more steps thereof is carried out in the process for producing the film body, in particular before step a) or as one or more sub-steps of step a) and / or of step b) and / or of step c).It is also possible for one or more steps for producing the layered composite, such as steps i), ii) and iii) or i) and iii), to be carried out by providing the heating foil composite, in particular the first composite. The heating foil composite can in particular be an intermediate product for and / or during the production of the layered composite and / or the film body. The layered composite can in particular be an intermediate product for and / or during the production of the film body or can also only be created during the production of the film body as a part of the film body. The device is preferably used in the method for producing a film body and / or is configured such that it is suitable for carrying out one or more method steps of the method for producing a film body.

[0027] The film body is preferably a vehicle part, more preferably a headlight, a vehicle interior trim, or a vehicle exterior trim. A cover element permeable to electromagnetic waves is understood to mean, in particular, a cover element for one or more radiation sources, preferably measuring devices, such as radar devices, and / or lighting devices, such as headlights, preferably LED headlights, preferably for a vehicle.In particular, a heatable cover element that is permeable to electromagnetic waves is understood to mean a cover element that is permeable to certain wavelengths, preferably at least in some regions, preferably outside the at least one heating wire and / or the multi-core heating cable, for certain wavelengths, preferably at least for wavelengths in a range from 1 GHz to 150 GHz for radar applications and / or in a range from 350 THz to 850 THz for visible light, and preferably has a transmittance, in particular for these wavelengths, of 5% to 100%. In particular, a surface of the cover element can be heated by means of the at least one heating wire and / or the multi-core heating cable. The film body can form the cover element and / or have additional layers and / or one or more radiation sources, preferably a measuring device, in particular a radar device, and / or a lighting device, in particular LED headlights.

[0028] Transparent means in particular a transmittance in a range of at least 70%, preferably up to 99%, in particular for radar radiation and / or visible light. Opaque means in particular a transmittance in a range of 0% to 70%, in particular for radar radiation and / or visible light. The transmittance can preferably be measured using a photometer. Visible to the human eye or visible light means in particular visible in daylight and / or visible in the form of visible wavelengths in a range from 380 nm to 780 nm. Radar radiation in particular has wavelengths in a range from 2.4 cm to 3.75 cm.

[0029] A layer or ply is preferably understood to mean a substantially planar structure, which itself can in particular be single-layered or multi-layered.

[0030] The visible side is preferably a side of the film body and / or of the layer composite which is or will be intended for viewing by a viewer. The visible side of the film body therefore has a free and / or visible surface, in particular during the intended use. A front side is in particular a side of an object facing the visible side, such as the at least one carrier film or the layer composite or the heating film composite, in particular the first composite, a layer or a component. A back side is in particular a side of an object facing away from the visible side, such as the at least one carrier film or the layer composite or the heating film composite, a layer or a component.

[0031] The minimum width is understood to mean, in particular, the smallest distance between two points on the outer contour of a cross-section, especially a cross-section with the smallest area. For a circular cross-section, for example, the minimum width corresponds to the diameter.

[0032] The minimum cross-sectional area is preferably the surface area of ​​a cross section with the smallest surface area. The minimum width and / or the minimum cross-sectional area preferably refers to a region of the heating wire with essentially constant dimensions. In particular, optionally present or later introduced locally reduced minimum widths or cross-sectional areas, for example, by or for contacting the heating wire with an energy source, are preferably not used to determine the minimum width and / or the minimum cross-sectional area. The minimum width and / or minimum cross-sectional area is preferably measured without taking into account any optionally present insulation.

[0033] In the case of the multi-core heating cable, it is particularly possible that dimensions such as a width, in particular a minimum width, and / or a diameter of the multi-core heating cable refer to the multi-core heating cable including optionally present layers, such as sheath layers, preferably insulation layers and / or bonding varnish layers. In particular, optionally present or subsequently introduced locally reduced or increased widths or diameters, for example, by or for contacting the multi-core heating cable with an energy source, should preferably not be used to determine the minimum width and / or the minimum cross-sectional area.

[0034] It is possible for the at least one heating wire to either have the above-mentioned minimum dimensions or for the at least one heating wire to be comprised of a multi-core heating cable. However, it is also possible for the at least one heating wire of the multi-core heating cable to have the above-mentioned minimum dimensions. In particular, if a multi-core heating cable is provided, the at least one decorative layer is optional. The heating foil composite, in particular the first composite, can therefore be regarded in particular as the layered composite, but a composite without a separate decorative layer can also be referred to. In preferred embodiments, the heating foil composite can therefore correspond to the layered composite with at least one decorative layer and the corresponding dimensions of the at least one heating wire.In particular, the multi-core heating cable of the heating foil composite, in particular of the first composite, may itself already have a decorative function, which differs, for example, from the visual appearance of a single heating wire that is supplemented in the layered composite with the at least one decorative layer. However, properties and / or steps related to the at least one heating wire are also conceivable, in particular with regard to the at least one heating wire of the multi-core heating cable.

[0035] It is particularly possible that the above-mentioned object is achieved by means of a layer composite or heating foil composite, preferably a first composite, in particular in the form of an insert element, preferably produced according to the method according to the invention and / or for use in the method according to the invention, comprising at least one carrier foil and comprising at least one heating wire, wherein the at least one heating wire A) has a minimum width and / or a smallest diameter of 50 pm and a minimum cross-sectional area of ​​2500 pm 2is present and / or B) is comprised of a multi-core heating cable, wherein the multi-core heating cable comprises one or more further heating wires, wherein the at least one heating wire and the one or more further heating wires are at least partially galvanically separated from one another, wherein the layer composite comprises the at least one heating wire of embodiment A) and at least one decorative layer or the heating foil composite comprises the at least one heating wire of embodiment B) and optionally at least one decorative layer, wherein in embodiment A) the at least one carrier foil, the at least one decorative layer and the at least one heating wire are connected, preferably materially connected, and in embodiment B) the at least one carrier foil and the multi-core heating cable and optionally the at least one decorative layer are connected, preferably materially connected.

[0036] It is particularly conceivable that the above-mentioned object is achieved by means of a method for producing a layered composite or a heating foil composite, preferably a first composite, in particular in the form of an insert element, preferably for use in the method according to the invention, comprising the steps: i) providing at least one carrier foil, ii) providing at least one decorative layer, and iii) providing at least one heating wire with a minimum width and / or a smallest diameter of 50 pm and a minimum cross-sectional area of ​​2500 pm 2 , iv) connecting, preferably by means of a material bond, the at least one carrier film (20), the at least one decorative layer and the at least one heating wire while maintaining the layer composite, and / or comprising the steps:

[0037] I) Providing at least one carrier film,

[0038] II) optionally providing at least one decorative layer, and

[0039] III) Providing a multi-core heating cable comprising at least one heating wire and one or more further heating wires, wherein the at least one heating wire and the one or more further heating wires are at least partially galvanically separated from one another,

[0040] IV) Connecting, preferably by material bonding, the at least one carrier foil and the multi-core heating cable (9) and optionally the at least one decorative layer while obtaining the heating foil composite, in particular the first composite.

[0041] "At least partially galvanically isolated" preferably means that the multi-core heating cable has at least one insulation that galvanically isolates several or all of the heating wires from one another. In particular, the multi-core heating cable has a contact point at at least one or two ends, at which several or all of the heating wires of the at least one heating wire and the one or more further heating wires are or will be galvanically connected, i.e., in particular, electrically conductively contacted, and / or galvanically connectable, i.e., in particular, electrically conductively contacted, with one another.

[0042] It is therefore possible that several or all heating wires of the multi-core heating cable are or will be connected in parallel or can be connected in parallel.

[0043] It is also conceivable that, in addition to the multi-core heating cable, one or more additional multi-core heating cables and / or one or more additional heating wires are provided. It is also possible for the at least one heating wire and / or one or more of the one or more additional heating wires to each be formed by a stranded wire, in particular by a plurality of individual wires in conductive contact with one another.

[0044] A preferably locally changing color effect and / or brightness effect is to be understood in particular as meaning that a change in viewing angle is accompanied by a change in color and / or brightness of the color effect and / or that when viewed from a certain viewing angle, the color effect is projected into the viewer's eye in different colors and / or different brightnesses in certain areas.

[0045] The gap of the device is, in particular, a gap for a part of the heating foil composite and / or the layer composite and / or the foil body, preferably for a contacting element. The gap is, in particular, not to be equated with an injection channel, in which, for example, a sprue can form.

[0046] Advantageous embodiments of the invention are described in the subclaims.

[0047] Step a) is to be understood in particular in such a way that the at least one carrier film, the at least one decorative layer and the at least one heating wire can be provided simultaneously or the at least one carrier film and / or the at least one decorative layer and / or the at least one heating wire are provided at different times.

[0048] The first carrier component obtained by step b) is or will be connected, in particular, to the at least one carrier film, the at least one heating wire and / or the multi-core heating cable and / or the at least one decorative film, in particular connected on the front side and / or rear side. It is thus possible for the first flowable composition to be applied, starting from the at least one carrier film, to a rear side or to a front side in step b). The first carrier component is thus preferably arranged on or as a rear side of the film body, starting from the at least one carrier film and / or starting from the second carrier component.It is also possible for the first carrier component to be arranged on or as a rear side of the film body, starting from the second carrier component, and for the at least one carrier film, in particular a first carrier film of the at least one carrier film, to be arranged on or as a rear side starting from the first carrier component. An arrangement of the first carrier component, in particular directly or indirectly, on a front side and / or a rear side of the at least one carrier film is preferably provided when the at least one decorative layer is connected, preferably by means of an in-mold decoration process (IMD process), to the at least one carrier film, which is preferably already connected to the at least one heating wire and / or the multi-core heating cable. The first flowable composition is preferably injected between the at least one decorative layer and the at least one carrier film.

[0049] Preferably, the back-injection molding or back-flooding in step b) takes place in such a way that a first body comprising the first carrier component, the at least one carrier film and the at least one heating wire and / or the multi-core heating cable and optionally the at least one decorative layer is obtained. It is particularly possible for the at least one decorative layer to be applied to the at least one carrier film before step b) or during step b) or to be applied to the first body after step b) and in particular before step c), for example by means of hot stamping. In particular, it is possible for the first body with the at least one decorative layer to be provided with the second carrier component and / or the protective lacquer layer in step c).It is possible that, preferably in step a), the at least one carrier film, the at least one decorative layer and / or the at least one heating wire and / or the multi-core heating cable are provided in the form of a layered composite. Alternatively or additionally, it is possible that in step a) the at least one carrier film and the at least one heating wire and / or the multi-core heating cable are provided in the form of a first composite, which is preferably the heating film composite, preferably wherein the at least one decorative layer is firmly integrated into the layered composite and / or into the film body in step b) or in step c), in particular by an in-mold decoration process (IMD process).To produce the layered composite, it is conceivable that the at least one carrier film and the at least one heating wire and / or the multi-core heating cable are provided in the form of a first composite, which is preferably the heating film composite, into which the at least one decorative layer is preferably integrated, in particular by an IMD process, preferably in step b) or in step c) and / or in step iv), to obtain the layered composite. In the IMD process, the at least one carrier film and the at least one decorative layer are preferably arranged on opposite sides of a cavity and back-injected therebetween, ie in particular between the at least one carrier film, which is preferably provided with the at least one heating wire and / or the multi-core heating cable, and the at least one decorative layer provided with the first carrier component or the second carrier component.For this purpose, the at least one decorative layer is provided in particular as a transfer layer of an IMD film that can be detached from a carrier film, preferably wherein the carrier film is pressed against a wall of the cavity during back-injection molding.

[0050] As can be seen from the previous explanations, but is also possible independently thereof, it is possible, for example, that the joining of step iv) for producing the layer composite takes place in or after step b) or in step c).

[0051] A layered composite or heating foil composite is understood in particular to mean a composite of two or more layers. In this composite, all layers are or are preferably held together by the layered composite or heating foil composite or composite itself. The layered composite, heating foil composite or composite is preferably self-supporting. Adhesion promoter layers and adhesive layers can be provided on and / or between layers of the layered composite or the heating foil composite or composite. It is possible for the heating foil composite or the layered composite to be a laminate or to comprise a laminate and one or more further layers, preferably wherein the laminate comprises at least the carrier film and the at least one decorative layer.

[0052] The application of the second flowable composition to a front side starting from the at least one carrier film is preferably carried out such that a direct arrangement of the second carrier component and / or the protective lacquer layer is or will be formed on the at least one carrier film, or such that an indirect arrangement of the second carrier component and / or the protective lacquer layer is or will be formed on the at least one carrier film. An indirect arrangement means, in particular, with one or more intermediate layers, such as the at least one decorative layer, the at least one heating wire, and / or the first carrier component.

[0053] A layered composite in the form of an insert element or a heating foil composite, in particular a first composite, in the form of an insert element is to be understood in particular as a layered composite or heating foil composite which is suitable for coating by injection molding. In the method for producing the film body, the insert element can be arranged in a cavity and further processed to form the film body and / or arranged in the cavity of the device and in particular further processed to form the film body. Recesses, in particular for pin receptacles of the device, are preferably provided in the insert element and / or the device has pin receptacles. The recesses in the - are conceivable in particular in conjunction with pin receptacles of the device engaging in the recesses for the precise positioning of the insert element in the cavity.Preferably, a minimum distance in a range of 0.2 mm to 4 mm, preferably 0.9 mm, is or will be formed between the at least one heating wire and the heatable surface and / or between the multi-core heating cable and the heatable surface. Advantageously, improved heat distribution can be achieved by the minimum distance, in particular by a "heat cone" forming around the at least one heating wire during heating, which then heats the heatable surface over a correspondingly larger area and / or more homogeneously. The second carrier component preferably has a layer thickness in a range of 200 μm to 40,000 μm.

[0054] It is possible for the second carrier component to be or be formed with a thermal conductivity of more than 0.02 W / (m*K), preferably in a range from 0.02 W / (m*K) to 0.06 W / (m*K). It is also possible for agents to be added to the second flowable composition or the second carrier component to increase thermal conductivity and / or for agents to be added to the first flowable composition or the first carrier component to reduce thermal conductivity. One or more of the following materials are or are preferably added to the second flowable composition or the second carrier component as agents to increase thermal conductivity: glass and / or glass fibers, metals and / or metal fibers, additives of an inorganic nature (fillers and the like).

[0055] As a means for reducing the thermal conductivity, the second flowable composition or the second carrier component preferably contains fibers made of plastics whose thermal conductivity is lower than the plastic surrounding them, in particular in a cured state.

[0056] In this context, it is preferable to ensure that increasing or decreasing thermal conductivity by introducing appropriate additives does not negatively impact the transmission of, for example, radar waves. A targeted and optimized adjustment is therefore preferred.

[0057] Thus, a further improved heat distribution directed towards the heatable surface can advantageously be achieved, in particular without undesirably influencing the transmission of radar waves and the like.

[0058] Preferably, the at least one heating wire and / or the multi-core heating cable is connectable to a control unit and / or an electrical energy source or is or will be connected thereto. The control unit is preferably configured such that, in an active heating state, the maximum temperature of the at least one heating wire and / or the multi-core heating cable lies in a range from 50°C to 75°C and / or the maximum temperature of the at least one heating wire and / or the multi-core heating cable is at least 20°C or 20 K lower than the minimum temperature of the glass transition temperature of the layered composite and / or the heating foil composite, in particular the first composite, and / or the film body and the decomposition temperature of the layered composite and / or the heating foil composite, in particular the first composite, and / or the film body, in particular in order to prevent melting of the surrounding plastic.

[0059] The at least one heating wire is or will be provided with a lacquer insulation, preferably before step iv) and / or before step a), and / or has a lacquer insulation. It is also possible for the at least one heating wire to have no lacquer insulation and / or to be or will be insulated, preferably only after step iv) or after at least one of steps b) and c).

[0060] The at least one heating wire preferably comprises or consists of at least one metal wire or one or more metal layers. The at least one heating wire further preferably comprises or consists of one or more of the following materials and / or the one or more further heating wires preferably comprise or consist of one or more of the following materials: NiCr15Fe, Cu, CuNi(Omn), CuMn12Ni, Constants, Alloy 30Mn70Cu, X10CrAISi13. It is also possible to use other materials for the at least one heating wire and / or the one or more further heating wires, provided they have sufficient conductivity and thermal output. Preferably, especially at an ambient temperature of 20°C, the specific resistance of the material is more than 0.3 Ω-mm 2 / m and / or the electrical conductivity is less than 3 S / m or m / Q-mm 2

[0061] In particular, for providing the at least one heating wire in step iii) and / or the multi-core heating cable in step III) and / or in step a), it is possible for the at least one heating wire and / or the multi-core heating cable to be provided in the form of a wire mesh and preferably arranged on the at least one carrier film. A wire mesh is preferably self-supporting. The wire mesh can also be formed by feeding the at least one heating wire and / or the multi-core heating cable onto the at least one carrier film by means of an ultrasonic sonotrode, in particular through an ultrasonic sonotrode.

[0062] It is possible that, in order to provide the at least one heating wire in step iii) and / or in step a), the at least one heating wire is provided by printing, in particular multilayer printing, one or more metal layers to which at least one carrier film is or will be applied. Multilayer printing is, in particular, printing of several overlapping layers, so that expediently a layer is or will be printed with a total layer thickness that corresponds to the sum of the layer thicknesses of the overlapping printed layers.

[0063] It is possible that, in order to provide the at least one heating wire in step iii) and / or in step a), the at least one heating wire is or will be applied to the at least one carrier film by single- or multi-layer printing of an electrically conductive lacquer, preferably in conjunction with one or more corresponding drying steps of printed lacquer layers of the lacquer, and preferably subsequently one or more electroplating steps of the printed lacquer layer and / or the printed lacquer. During the drying of the printed lacquer layers, in particular, solvents are expelled and / or the structure of the conductive particles in the lacquer changes, thus supporting electroplating.

[0064] It is possible that, in particular after or during one of steps iii) and iv) and / or after or during one of steps III) and IV) or before step iv) and / or before step IV) and / or before step a), the at least one heating wire and / or the multi-core heating cable is or will be at least partially introduced or applied, preferably has at least partially penetrated or penetrates, into or onto one or more layers of the layer composite and / or the heating foil composite, in particular of the first composite, and / or into the at least one carrier foil, in particular into the first carrier foil and / or the second carrier foil, and / or the at least one heating wire and / or the multi-core heating cable between two layers of the layer composite and / or the heating foil composite, in particular of the first composite,and / or is or will be introduced between the at least one carrier film and a substrate and / or between the first carrier film and the second carrier film.,

[0065] It is possible that, preferably after or during one of steps iii) and iv) and / or after or during one of steps III) and IV) and / or before step a), the following step is carried out: a1) at least partial introduction, in particular penetration, of the at least one heating wire and / or the multi-core heating cable into the at least one carrier film, in particular into the first carrier film or the second carrier film. It is possible that, in particular after step iv) and / or after step IV) and / or after one of steps b) and c), the at least one heating wire and / or the multi-core heating cable completely penetrates one or more decorative layers of the at least one decorative layer and / or one or more decorative layers of the at least one decorative layer.

[0066] The heating wire and / or the multi-core heating cable can be arranged, in particular in different ways, on and / or in the at least one decorative layer and / or on and / or in the at least one carrier film. This different arrangement can depend on one or more of the following conditions: energy input during the attachment of the heating wire and / or the multi-core heating cable to a respective substrate, the material of the carrier film, the material of the heating wire, the minimum width and / or smallest diameter of the heating wire and / or the multi-core heating cable, the cross-sectional shape of the heating wire and / or the multi-core heating cable, the dwell time of the energy input during the attachment of the heating wire and / or the multi-core heating cable to the respective substrate, the thermal conductivity of the heating wire and / or the multi-core heating cable, the thermal conductivity of the decorative layer, the thermal conductivity of the carrier film.

[0067] The arrangement of the heating wire and / or the multi-core heating cable, in particular this respective different arrangement of the heating wire and / or the multi-core heating cable, can be or be provided, for example, as follows: a) the heating wire and / or the multi-core heating cable can be embedded in the carrier film and in the decorative layer or b) the heating wire and / or the multi-core heating cable can only be embedded in the decorative layer or c) the heating wire and / or the multi-core heating cable can be partially embedded in the carrier film in the decorative layer and, depending on the location, in the area or d) the heating wire and / or the multi-core heating cable can lie on the decorative layer and be only partially embedded in the decorative layer and not be embedded in the carrier film.It is also possible that the at least one heating wire and / or the multi-core heating cable is introduced or is introduced into one or more layers or parts and / or between at least two layers or parts, in particular of the heating foil composite, preferably of the first composite, and / or of the layer composite and / or of the foil body, selected from: the first carrier component, the second carrier component, the protective lacquer layer, the at least one carrier foil, a first carrier foil of the at least one carrier foil, a second carrier foil of the at least one carrier foil, a substrate with a reflective layer, the at least one decorative layer, a first decorative layer of the at least one decorative layer, a second decorative layer of the at least one decorative layer.

[0068] It is particularly possible that, preferably after or during one of steps iii) and iv) and / or after or during one of steps III) and IV) and / or before step a), the following step is carried out: a2) at least partial introduction of the at least one heating wire and / or the multi-core heating cable between two layers of the layer composite and / or the heating foil composite, in particular the first composite, and / or between the at least one carrier foil and a substrate and / or between the first carrier foil and the second carrier foil.

[0069] The first carrier film is or will preferably be arranged further to the front and / or closer to the visible side than the second carrier film. The first decorative layer is or will preferably be arranged further to the front and / or closer to the visible side than the second decorative layer. The second decorative layer is preferably arranged on a rear side, starting from the at least one carrier film. In particular, the second decorative layer does not necessarily require the first decorative layer.

[0070] The term “has penetrated” or “penetrate” is to be understood in particular as meaning that the layer or component into which the at least one heating wire and / or the multi-core heating cable has penetrated or is penetrating, in particular as a result of the application process, has elevations and depressions, wherein the at least one heating wire and / or the multi-core heating cable is or will be arranged in one or more of the depressions. The at least one heating wire and / or the multi-core heating cable is preferably at least partially enclosed by elevations adjacent to the one or more depressions. It is also possible for the at least one heating wire and / or the multi-core heating cable to be completely enclosed by a layer into which it has penetrated. It is also possible for the at least one heating wire and / or the multi-core heating cable to be completely enclosed by a layer into which it orit has penetrated through the application process and in the other areas is not completely enclosed by a layer into which it has partially penetrated through the application process.

[0071] It is possible that the heating wire is or will be introduced into the at least one carrier film, in particular into the first carrier film or into the second carrier film and / or into the at least one decorative layer, in particular into the first and / or second decorative layer and / or into the layer composite and / or into the heating film composite, in particular the first composite, with a penetration depth in a range of 20% to 100%, in particular 50% to 80%, of its thickness, in particular its minimum width and / or its diameter.It is also possible for the multi-core heating cable to be introduced into the at least one carrier film, in particular into the first carrier film or the second carrier film and / or into the at least one decorative layer, in particular into the first and / or second decorative layer and / or into the layer composite and / or into the heating film composite, in particular the first composite, with a penetration depth in a range of 20% to 100%, in particular 50% to 80%, of its thickness, in particular its minimum width and / or minimum height and / or its diameter. A penetration depth can preferably be measured in cross-section, preferably in a plane with the direction of extension of the heating wire and / or the multi-core heating cable as a normal to this plane.The penetration depth is preferably determined by comparing the depth of elevations and depressions of layers adjacent to the heating wire and / or the multi-core heating cable with the width of the heating wire and / or the multi-core heating cable, measured in the same direction as the surface normal of the element in which the heating wire and / or the multi-core heating cable is / was introduced.

[0072] It is also possible for the at least one heating wire and / or the multi-core heating cable to be or be introduced into one or more adhesive layers, in particular a first adhesive layer or a second adhesive layer, provided by the at least one carrier film, in particular the first and / or second carrier film. It is particularly possible for the at least one carrier film to have or be provided with a first adhesive layer, to which in particular the at least one heating wire and / or the multi-core heating cable is or is applied and / or into which the at least one heating wire and / or the multi-core heating cable is or is introduced. The first adhesive layer is preferably arranged on a front side or a back side of the at least one carrier film.

[0073] It is preferred that, prior to step a) and / or for connecting step iv) and / or step IV), penetration of the heating wire and / or the multi-core heating cable is carried out by means of ultrasound, in particular with a frequency in a range from 20 kHz to 150 kHz, preferably from 50 kHz to 100 kHz, wherein lower ultrasonic frequencies are usually associated with a higher amplitude and higher ultrasonic frequencies with a lower amplitude.

[0074] Preferably, the ultrasound is generated by one or more sonotrodes, and the at least one heating wire and / or the multi-core heating cable is applied, in particular, to the one or more sonotrodes, but preferably guided by the corresponding sonotrode during the process, in particular to facilitate guidance around curves and the like. The layer into which the heating wire and / or the multi-core heating cable is to penetrate and the at least one heating wire and / or the multi-core heating cable are preferably arranged adjacent to one another.

[0075] In particular, the ultrasound increases the flowability of the layer into which the heating wire and / or the multi-core heating cable is intended to penetrate, such that the penetration of the at least one heating wire and / or the multi-core heating cable occurs under the existing application pressure, with the at least one heating wire and / or the multi-core heating cable displacing material of this layer. Preferably, the ultrasound causes a local energy input due to friction at contact areas with the at least one heating wire and / or the multi-core heating cable, accompanied by a local melting of this layer.

[0076] Preferably, the at least one heating wire and / or the multi-core heating cable is guided through the sonotrode or guided to the sonotrode, wherein the sonotrode vibrates and / or oscillates with ultrasound, for example at 70 kHz. Preferably, by means of the sonotrode, in particular by means of a mouthpiece of the sonotrode, the at least one heating wire and / or the multi-core heating cable is attached, preferably successively attached, to the surface of the at least one carrier film and introduced, preferably successively introduced, into the surface. This is done in particular by the surface and / or an insulation of the at least one heating wire and / or at least one sheath layer, in particular at least one baked enamel layer, of one or more sheath layers, being melted locally at the location of the sonotrode, in particular the mouthpiece, as a result of the ultrasound, and preferably the surface is connected to the insulation and / or the at least one sheath layer.At the same time, the sonotrode is preferably moved along a path that follows the final shape of the at least one heating wire and / or the multi-core heating cable. In this context, but also independently thereof, an embodiment may be advantageous in which the at least one heating wire and / or the multi-core heating cable is or will be arranged in a curved, preferably loop-shaped, manner in the heating foil composite, in the layered composite and / or in the film body, at least in some regions, and / or is or will be arranged in a curved, preferably loop-shaped, manner in at least some regions on a flat or curved surface of the at least one carrier film. In particular, the at least one heating wire and / or the multi-core heating cable, preferably in the heating foil composite, in the layered composite and / or in the film body, i.e., in a Cartesian coordinate system, has a curvature in all three spatial directions.The sonotrode is expediently movable and / or rotatable in one or more spatial directions. The sonotrode is preferably moved by a robot arm, preferably automatically, and / or is movable by means of the robot arm. Alternatively or additionally, it is possible for the at least one carrier foil to be arranged on a table during the production of the layered composite and / or the heating foil composite, which is movable and / or rotatable in one or more spatial directions. A particular advantage is that complex surfaces can be reliably and efficiently provided with the at least one heating wire and / or the multi-core heating cable.

[0077] Furthermore, a feed device for applying the at least one heating wire and / or the multi-core heating cable together with the sonotrode and a supply unit, in particular a supply roll, for providing the at least one heating wire and / or the multi-core heating cable can be provided, wherein the supply unit, preferably together with the sonotrode, is movably arranged and / or moved. The at least one heating wire and / or the multi-core heating cable is expediently guided from the supply unit to the sonotrode and / or through the sonotrode, for example by unwinding from the supply roll.

[0078] After the at least one heating wire and / or the multi-core heating cable has been applied by means of the sonotrode, it is particularly possible to perform the following step: severing, in particular automatically severing, the at least one heating wire and / or the at least one heating cable. After the severing, the feed device and / or the sonotrode are preferably removed from the at least one carrier film with the at least one heating wire and / or the multi-core heating cable.

[0079] The at least one heating wire is preferably opaque, in particular to visible light, preferably for wavelengths in a range from 380 nm to 780 nm. The one or more further heating wires are preferably opaque, in particular to visible light, preferably for wavelengths in a range from 380 nm to 780 nm. It is possible for the at least one heating wire and / or the multi-core heating cable to be visible from the visible side of the film body, in particular to the human eye, preferably to the unaided human eye. It is possible for the shape of the at least one heating wire to be logically linked to a motif formed by the at least one decorative layer. It is also possible for the at least one heating wire and / or the multi-core heating cable to be invisible from the visible side of the film body, in particular to the human eye, preferably to the unaided human eye.

[0080] It is possible for the at least one heating wire and / or the multi-core heating cable to have one or more of the following shapes, particularly when viewed perpendicular to a plane spanned by the layer composite and / or the at least one carrier film: spiral path, loop-shaped path, jagged paths, oscillating paths with constant or changing amplitude, U-shaped paths, straight paths, which are preferably connected by curved paths, wherein, for example, each or every second curved path has the same sign of the curvature, merging, preferably straight, paths, which are preferably connected by corner points.

[0081] Conveniently, the at least one heating wire and / or the multi-core heating cable overlaps at least partially with a radiation region, wherein the radiation region is or will be provided in particular to be irradiated with electromagnetic radiation from a radiation source enclosed by the film body or connected or connectable to the film body. The radiation from the radiation source can be at least partially reflected, for example, by a reflective layer before irradiation. The radiation region can also be or will be designed to be larger than the actually irradiated area.In particular, the radiation region can be present over its entire surface in the layer composite and / or the heating foil composite, in particular the first composite, and / or in the film body when viewed perpendicular to a plane spanned by the layer composite and / or the heating foil composite, in particular the first composite, and / or the at least one carrier film, or when viewed from the visible side of the film body, or can be present over its partial surface in the layer composite and / or the heating foil composite, in particular the first composite, and / or in the film body.

[0082] The film body is preferably connected to a radiation source, in particular a measuring device, preferably a radar device, for example for distance measurement, and / or a light source, for example for forming a headlight and / or for forming backlighting of the at least one decorative layer, in particular in addition to a headlight function. Advantageously, despite the at least one decorative layer and the at least one heating wire and / or the multi-core heating cable, an overall sufficient transparency of the film body, in particular of the cover element, can be achieved.The influence of the heating wire and / or the multi-core heating cable on measured values ​​of a measuring device optionally provided with the foil body is preferably negligible and / or can be taken into account, for example, by adapting the processing of measured data using training data and / or in the design of the heating windings and the surface area of ​​the heating wires to provide the heating, taking into account the required electrical resistances of the heating wires. In particular, this ensures that the heating output in the component is so high that the areas through which the radiation passes are ice-free or can be defrosted, and is also designed in particular to maximize the transmission of the respective radiation or minimize its absorption.It is possible for the at least one heating wire and / or the multi-core heating cable, in particular when viewed perpendicular to a plane spanned by the heating foil composite, in particular the first composite, the layer composite and / or the at least one carrier foil, preferably the first carrier foil, to occupy an area in a range from 0.1% to 50%, preferably in a range from 1% to 10%, particularly preferably in a range from 1% to 5%, wherein the occupied area is the surface area of ​​the region of the heating foil composite, in particular the first composite, and / or the layer composite, in particular the at least one carrier foil, preferably the first carrier foil, overlapping with the at least one heating wire and / or the multi-core heating cable, divided by the total area of ​​the heating foil composite and / or layer composite, in particular the first carrier foil.Such a surface coverage can advantageously provide a particularly high heat output, in particular, wherein the at least one heating wire can be designed to be visually visible and, for example, can be easily integrated into a design. In this context, the surface coverage of the heating wire and / or the multi-core heating cable across the surface of the cover element can preferably be inhomogeneous rather than homogeneous, which allows for the formation of regions with both higher and lower heat outputs.

[0083] It is also possible that several heating wires with one or more features that are described for the at least one heating wire are or will be provided.

[0084] The heating foil composite, in particular the first composite, and / or the layer composite preferably has a length and / or width in a range of 3 cm to 350 cm and / or an area in a range of 5 cm 2 up to 60000 cm 2 , in particular when viewed perpendicular to a plane spanned by the heating foil composite and / or the layer composite and / or the at least one carrier foil, preferably in plan view. The heating foil composite and / or the layer composite preferably has a thickness in a range of 0.1 cm to 10 cm, preferably in a range of 0.2 cm to 5 cm. The foil body preferably has a length and / or width in a range of 3 cm to 350 cm and / or an area in a range of 5 cm 2 up to 60000 cm 2, in particular when viewed perpendicular to a plane spanned by the film body, preferably in plan view. The film body preferably has a thickness in a range from 0.1 cm to 10 cm, preferably in a range from 0.2 cm to 5 cm.

[0085] It is possible for the at least one heating wire and / or the multi-core heating cable, in particular when viewed perpendicular to a plane spanned by the layer composite and / or the heating foil composite, in particular the first composite, and / or the at least one carrier foil, to occupy an area in a range from 0.1% to 50%, preferably in a range from 1% to 10%, particularly preferably in a range from 1% to 5%. The occupied area is in particular the surface area of ​​the region of the layer composite and / or the heating foil composite, in particular the first composite, and / or the at least one carrier foil that overlaps with the at least one heating wire and / or the multi-core heating cable, divided by the total area of ​​the layer composite and / or the heating foil composite, in particular the first composite, and / or the at least one carrier foil.

[0086] It is particularly possible that the at least one carrier foil, which is provided with the at least one heating wire and / or the multi-core heating cable, and / or the heating foil composite and / or the layer composite has the following exemplary properties:

[0087] Width of 100 cm, length of 100 cm, area 10000 cm 2 ,

[0088] Distance d, preferably minimum distance d, of opposite, in particular parallel, conductor tracks of the at least one heating wire: 0.5 cm Number of opposite, in particular parallel, conductor tracks of the at least one heating wire: 200, preferably 10000 cm 2

[0089] Distance of at least one heating wire from opposite ends of the layer composite: 1 cm.

[0090] Length of at least one heating wire: 19600 cm,

[0091] Diameter of at least one heating wire: 100 pm,

[0092] Occupied area: 196 cm 2(= length of at least one heating wire x diameter of at least one heating wire).

[0093] Area coverage of the at least one heating wire: 1.96% (= percentage of the area of ​​the at least one heating wire in relation to the total area).

[0094] The total area can therefore be determined in particular based on the product of the width and the length of the layer composite and / or the at least one carrier film.

[0095] It is possible that step c) comprises one or more of the following steps: c1) overmolding the at least one carrier film, in particular the layer composite and / or the heating film composite, in particular the first composite, with the second flowable composition in the form of a plastic injection molding compound to obtain the second carrier component, c2) flooding the at least one carrier film, in particular the layer composite and / or the heating film composite, in particular the first composite, with the second flowable composition, which preferably comprises or consists of polyurethane (PUR), to obtain the second carrier component, c3) painting the at least one carrier film, in particular the layer composite and / or the heating film composite, in particular the first composite, with the second flowable composition to obtain a protective paint layer.

[0096] It is also possible that step c3) is carried out after step c1) and / or after step c2) as follows: c3) coating the at least one carrier film, in particular the layer composite and / or the heating film composite, in particular the first composite, with a third flowable composition to obtain a protective lacquer layer.

[0097] It is possible that step c3) is carried out by wet painting, preferably by spraying or flooding or dipping.

[0098] The second and / or third flowable composition applied to the at least one carrier film in step c1), c2) and / or c3) can in particular be applied directly or indirectly.

[0099] It is possible that the first and / or second and / or third flowable composition and / or the first carrier component, the second carrier component and / or the protective lacquer layer comprises or consists of a 2K lacquer.

[0100] A 2K paint is, in particular, a two-component paint. It is possible for the first and / or second and / or third flowable composition and / or the first carrier component, the second carrier component and / or the protective paint layer to comprise or consist of one or more of the following materials: polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), melamine, acrylates. Preferably, the first and / or second and / or third flowable composition comprising or consisting of a 2K paint is free of polymers and / or free of thermoplastic polyurethane (TPU). The second carrier component, which is or will be produced in particular by means of step c2) and / or c3), and / or the protective paint layer, which is or will be produced in particular by means of step c3), preferably comprises or consists of a thermoset and / or is free of thermoplastic.

[0101] It is also possible for the first and / or second and / or third flowable composition to comprise or consist of a radiation-curing lacquer, preferably a radiation-curing dual-cure lacquer. In particular, the first and / or second carrier component and / or the protective lacquer layer is or will be produced from a radiation-curing lacquer, preferably a radiation-curing dual-cure lacquer. In particular, the radiation-curing lacquer, preferably a radiation-curing dual-cure lacquer, is or will be thermally pre-crosslinked in a first step during and / or after application in liquid form. Preferably, in a second step, in particular after processing the heating foil composite and / or the layer composite, the radiation-curing lacquer, preferably a radiation-curing dual-cure lacquer, is post-crosslinked radically, in particular via high-energy radiation, preferably UV radiation.Dual-cure coatings of this type can consist of or comprise various polymers or oligomers which contain unsaturated acrylate or methacrylate groups. These functional groups can be radically crosslinked with one another, particularly in the second step. For thermal pre-crosslinking in the first step, it is particularly advantageous if these polymers or oligomers also contain at least two or more alcohol groups. These alcohol groups can be crosslinked with multifunctional isocyanates or melamine-formaldehyde resins. Preferred unsaturated oligomers or polymers are various UV raw materials such as epoxy acrylates, polyether acrylates, polyester acrylates and, in particular, acrylate acrylates. Both blocked and unblocked isocyanates based on TDI (TDI = toluene-2,4-diisocyanate), HDI (HDI = hexamethylene diisocyanate) or IPDI (IPDI = isophorone diisocyanate).The melamine crosslinkers can be fully etherified versions, imino types, or benzoguanamine types. The protective coating layer preferably has a thickness in the range of 5 μm to 20 μm.

[0102] The protective lacquer layer can be formed alternatively or in addition to the second carrier component, and in particular can be arranged on the front side of the heating foil composite, in particular the first composite, and / or the layer composite and / or on the visible side of the second carrier component. To form the protective lacquer layer, the heating foil composite and / or layer composite, in particular with the first carrier component and optionally the second carrier component, is previously removed from the cavity in order to place it, for example, in a second cavity, in particular with a precise fit, and to apply the protective lacquer layer, preferably to apply it to the layer composite.

[0103] The backflooding of step b) and / or the flooding of step c2) is, in particular, a flooding process. During the backflooding of step b) and / or the flooding of step c2), the first and / or second flowable composition is or will preferably be formed by a flooding mass. The flooding mass is preferably flowed into a cavity at a pressure of not more than 10 bar and / or a temperature in a range from 30°C to 100°C. The flooding mass preferably comprises one or more materials selected from: PUR, PUR derivatives, or consists thereof.

[0104] The first carrier component preferably has a layer thickness in a range of 50 pm to 2000 pm.

[0105] The overmolding in step c1) is, in particular, an injection molding process, wherein the second flowable composition is a plastic injection-molding compound. The resulting second carrier component is preferably transparent, more preferably crystal-clear. The backmolding in step b) is, in particular, an injection molding process. The first flowable composition in the backmolding process is preferably a plastic injection-molding compound.

[0106] During injection molding, the plastic injection molding compound is preferably injected at a pressure in a range of 100 bar to 2000 bar and / or a temperature in a range of 100°C to 350°C into a cavity in which in particular the heating foil composite and / or the layer composite is inserted and preferably one or more closed free spaces are formed adjacent to the layer composite, into which the plastic injection molding compound is injected.

[0107] A plastic injection molding compound preferably comprises or consists of one or more of the following materials: thermoplastic, in particular polyurethane, thermosetting plastic, or a mixture. Suitable plastic injection molding compounds are preferably selected from the group consisting of acrylonitrile-butadiene-styrene copolymers (abbreviation: ABS), polycarbonate (abbreviation: PC), a mixture of ABS and PC, polyoxymethylene (abbreviation: POM), polymethyl methacrylate (abbreviation: PMMA), styrene-acrylonitrile copolymers (abbreviation: SAN), acrylonitrile-styrene-acrylate copolymers (abbreviation: ASA), polypropylene (abbreviation: PP), olefin-based thermoplastic elastomers (abbreviation: TPO), polyamides (abbreviation: PA), and mixtures of at least two materials from this group that are compatible with each other.

[0108] To carry out step b), in particular to carry out the back-injection molding, and / or step c1), in particular to carry out the over-injection molding, the heating foil composite, in particular the first composite, and / or the layer composite and / or in particular the at least one carrier foil, which is provided with the at least one heating wire and / or the multi-core heating cable, is or will be placed into a cavity formed by preferably at least two tool molds, in particular by the first and second tool molds of the device according to the invention. The cavity is formed in particular by preferably closing the at least two tool molds.Subsequently, the first carrier component is preferably formed by back-injection molding of the heating foil composite and / or the layer composite and / or the at least one carrier foil, which is provided with the at least one heating wire and / or the multi-core heating cable, with the first flowable composition, wherein the first flowable composition assumes a shape that follows the cavity and is cured to form the first carrier component, and / or the second carrier component is preferably formed by over-injection molding of the heating foil composite and / or the layer composite and / or the at least one carrier foil, which is provided with the at least one heating wire and / or the multi-core heating cable, with the second flowable composition, wherein the second flowable composition assumes a shape that follows the cavity and is cured to form the second carrier component.For this purpose, in particular before the back-injection or over-injection, a first free space is formed on the heating foil composite and / or layer composite and / or on the at least one carrier foil which is provided with the at least one heating wire and / or the multi-core heating cable, for forming the first carrier component from the cavity and / or a second free space is formed on the heating foil composite and / or layer composite and / or the at least one carrier foil which is provided with the at least one heating wire and / or the multi-core heating cable, for forming the second carrier component from the cavity and / or a further cavity, which is preferably formed by changing at least one of the at least two tool molds.

[0109] The first and second free spaces are or will preferably be arranged on opposite sides of the heating foil composite and / or layer composite and / or the at least one carrier foil provided with the at least one heating wire and / or the multi-core heating cable, and / or the back-injection molding and the over-injection molding are preferably carried out, in particular successively, on two opposite sides of the heating foil composite and / or layer composite and / or the at least one carrier foil provided with the at least one heating wire and / or the multi-core heating cable. For this purpose, the cavity between the back-injection molding and the over-injection molding can be adapted, for example, by exchanging a tool mold or by rotating a tool mold.To carry out step c), the heating foil composite and / or layer composite, in particular together with the first carrier component, and / or the at least one carrier foil which is provided with the at least one heating wire and / or the multi-core heating cable and in particular is provided with the first carrier component, is preferably arranged in a further cavity of a further injection molding device and / or a flooding device or the further cavity is formed in the same injection molding device and the further cavity is closed or a second free space is formed on a side of the heating foil composite and / or layer composite and / or the at least one carrier foil which is provided with the at least one heating wire and / or the multi-core heating cable, which is opposite the first carrier component, in the cavity used for back-injection molding or back-flooding.

[0110] Subsequently, the second carrier component is formed by over-injecting or flooding the layer composite and / or the at least one carrier film, which is provided with the at least one heating wire, with the second flowable composition, wherein the second carrier component assumes a shape following the further cavity and / or a shape following the second free space.

[0111] It is possible that step b) and / or step iv) involves an IMD process (IMD = In-Mold Decoration). Preferably, during the back-injection molding of step b), the first flowable composition or the first carrier component obtained therefrom is or will be bonded to the at least one carrier film, which is provided with the at least one heating wire and / or the multi-core heating cable, and / or to the at least one decorative layer and / or to the layered composite and / or to the heating film composite, and thus preferably decorated using an IMD process.

[0112] It is possible for the heating foil composite and / or the layer composite and / or the at least one carrier foil provided with the at least one heating wire and / or the multi-core heating cable to be an in-mold label and / or for step b) to be an IML process (IML = in-mold labeling). In this case, the at least one carrier foil provided with the at least one heating wire and / or the multi-core heating cable and / or, preferably after step iv) or after step IV), the layer composite or the heating foil composite is or will be obtained by a separation process, preferably punching, in particular from the layers joined in step iv) or step IV).

[0113] The method for producing the heating foil composite or the layer composite, which can preferably be included in the method for producing the foil body, and / or the method for producing the foil body comprises in particular one or more of the following steps, in particular in the specified order:

[0114] - Laminating and / or screen printing and / or hot stamping the at least one decorative layer onto the at least one carrier film, in particular to obtain a roll or a sheet with the at least one decorative layer and the at least one carrier layer,

[0115] - punching the at least one carrier film with the at least one decorative layer, in particular the roll or the sheet, preferably to obtain an in-mold label,

[0116] - Placing the at least one heating wire and / or the multi-core heating cable onto the at least one carrier film with the at least one decorative layer, in particular while maintaining the layer composite - Inserting the layer composite into an injection molding tool,

[0117] - carrying out step b), in particular back-injection of the layered composite with the first flowable composition, which is a thermoplastic composition,

[0118] - carrying out step c), in particular flooding the layer composite with the second flowable composition, which preferably comprises or consists of PUR, and optionally overcoating the layer composite and / or the second carrier component with the third flowable composition to obtain a protective lacquer layer,

[0119] - Installation in a vehicle, in particular as exterior or interior paneling.

[0120] - Establish contact between the heating element and the corresponding voltage supply of the vehicle, in particular via the contacting element.

[0121] It is possible that the application of the at least one heating wire and / or the multi-core heating cable is carried out before or after punching, wherein the layer composite is obtained by punching.

[0122] It is also possible for the heating foil composite and / or the layered composite to be formed, in particular using an HPF process (HPF = High Pressure Forming). In this case, the heating foil composite and / or the layered composite is formed using high pressure and low temperature, in particular a pressure in the range of 80 bar to 120 bar at a temperature in the range of 80°C to 150°C. Forming can be carried out, in particular, after step iv) and / or before step b).

[0123] Furthermore, it is possible to feed the heating film composite and / or the layer composite as an insert element into an injection molding process, whereby the film body can be obtained, as described in particular for the method for producing a film body. Preferably, the at least one carrier film comprises or consists of polycarbonate (PC). It is also possible for the at least one carrier film to be single-layer or multi-layered and / or, preferably as an extrudate, coextrudate, or triextrudate, to comprise or consist of one or more thermoplastics, in particular to comprise or consist of one or more of the following materials: PC, acrylonitrile-butadiene-styrene copolymer (ABS), polymethyl methacrylate (PMMA), polypropylene (PP). Coextrudates or triextrudates can in particular have several layers of the same materials or several layers of different materials.

[0124] The at least one heating wire and / or the multi-core heating cable is or will preferably be introduced directly into such a carrier film and / or into an adhesive layer provided by such a carrier film.

[0125] Preferably, the at least one carrier film, particularly in the heating film composite and / or in the layer composite and / or in the film body, is transparent, more preferably crystal-clear, preferably for wavelengths of light visible to the human eye. The layer thickness of the carrier film, particularly of the at least one carrier film comprising or consisting of PC, is in particular in a range from 50 μm to 2000 μm, preferably 375 μm.The at least one carrier film, in particular the first carrier film and / or the second carrier film, is preferably continuous and / or hole-free, in particular over the entire surface and / or at least in one or more regions occupied by the at least one heating wire and / or the multi-core heating cable, and more preferably outside a contacting element and / or outside a contact region and / or outside a contact point, such as, for example, an area with a soldering point, for contacting the at least one heating wire and / or the multi-core heating cable. It is also possible for the at least one carrier film and / or the layer composite and / or the heating film composite, in particular the first composite, to have a first carrier film and a second carrier film, both preferably consisting of or comprising PC.One or more of the following components are preferably contained between the first carrier film: the at least one heating wire, a substrate with a reflective layer, the at least one decorative layer, in particular a first decorative layer and / or a second decorative layer.

[0126] The front side of the film body and / or, for example, at least the materials of the layers that are or will be arranged from the visible side to the at least one heating wire, to the at least one decorative layer, and / or to the at least one carrier film, are preferably transparent and / or non-opaque, in particular to visible light. In particular, the at least one heating wire and / or the at least one decorative layer and / or the multi-core heating cable are thus visible from the visible side of the film body.

[0127] It is possible for the at least one heating wire and / or the multi-core heating cable, particularly in the process for producing the film body and in the produced film body, to be arranged directly adjacent to the second carrier component or the protective lacquer layer. For this purpose, it is possible for the second and / or third flowable composition to be brought into direct contact with the at least one heating wire and / or the multi-core heating cable.

[0128] It is possible for a first side of the at least one carrier film to be or be provided with at least one first decorative layer and the at least one heating wire and / or the multi-core heating cable, and for a second side, which is opposite the first side, to be or be provided with at least one further decorative layer, in particular the second decorative layer. In particular, the first side can represent either the front side or the back side of the at least one carrier film. The first decorative layer preferably does not necessarily require the second decorative layer. However, it is possible for both to be present.

[0129] It is also possible that the at least one heating wire and / or the multi-core heating cable, preferably with at least one of the at least one decorative layer, more preferably with the first and / or the second decorative layer, is or will be arranged between two carrier films, in particular the first carrier film and the second carrier film of the at least one carrier film.

[0130] It is possible for the at least one decorative layer and / or one or more additional layers to be arranged in the heating foil composite and / or in the layer composite and / or in the foil body. In particular, one or more of the at least one decorative layer and / or the one or more additional layers are or will be formed as an intermediate layer, an adhesive layer, and / or as a dirt-repellent layer.

[0131] One or more of the at least one decorative layer and / or the additional layers can be applied using one of the following methods: physical vapor deposition (PVD), in particular vapor deposition and / or sputtering, preferably by means of organic vapor deposition and / or magnetron sputtering; chemical vapor deposition (CVD), in particular parylene deposition. A layer comprising or consisting of parylene can preferably be used for the dirt-repellent function of a layer.

[0132] It is particularly possible for one or more of the at least one decorative layer and / or the one or more further layers to be arranged between two or more layers of the heating foil composite and / or the layer composite and / or the film body. It is preferably possible for one or more of the at least one decorative layer and / or the one or more further layers to be arranged as an outermost layer of the heating foil composite and / or the layer composite and / or the film body and / or to be arranged between the heating foil composite or the layer composite and the first flowable composition or the first carrier component, between the heating foil composite or the layer composite and the second flowable composition or the second carrier component or the protective lacquer layer.

[0133] The film body, in particular the film body obtained by the method, preferably has a visible side and a back side. The visible side can be understood in particular as the side facing the viewer of the film body during its intended use.

[0134] The at least one carrier film has in particular a back side and a front side, preferably wherein the visible side of the film body can be formed, is formed or will be formed at least on the front side and / or the back side of the film body can be formed, is formed or will be formed on the back side of the at least one carrier film. The at least one heating wire and / or the multi-core heating cable is or will preferably be applied to a front side or the back side of the at least one carrier film. It is also possible for the at least one decorative layer to comprise a plurality of decorative layers, in particular wherein one or more decorative layers are or will be arranged on the front side and / or one or more decorative layers are or will be arranged on the back side. The at least one heating wire and / or the multi-core heating cable is preferably applied to one side of the at least one carrier film with or without a decorative layer.In particular, the at least one heating wire and / or the multi-core heating cable forms only one layer and / or only one preferably coherent heating wire structure and / or one preferably coherent heating cable structure and / or is arranged on only one side, for example only the front or the back of the heating foil composite and / or the layer composite. Preferably, the at least one carrier foil and / or the layer composite and / or the heating foil composite, in particular the first composite, and / or in particular the foil body, comprises a substrate, which preferably has a reflective layer.It is possible that the at least one carrier film comprises a first carrier film and a second carrier film, wherein the substrate comprising at least one reflection layer is or will be arranged between the first carrier film and the second carrier film and in particular wherein the at least one heating wire and / or the multi-core heating cable is or will be arranged between the first carrier film and the substrate or between the second carrier film and the substrate.Preferably, the reflective layer comprises a material which, together with at least one adjacent layer, in particular selected from the at least one carrier film, preferably the first carrier film and / or the second carrier film, and / or an adhesive layer on the at least one carrier film, preferably on the first carrier film and / or on the second carrier film, and / or the material comprising this layer(s) in the finished film body, forms an optical interface, preferably in such a way that there is a difference in the refractive index of materials at the interface. Reflection therefore takes place at this optical interface. This optical interface is then in particular at least partially reflective, i.e.In particular, a portion of laterally radiated light, in particular light radiated laterally at least into the first carrier component, is reflected at the interface, while another portion is allowed to pass, in particular in the direction of the at least one decorative layer and the at least one heating wire and / or the multi-core heating cable. Thus, light radiated into the film body, in particular into at least the first carrier component, is partially captured in the layer structure, in particular to enable at least weak backlighting of the at least one decorative layer.

[0135] The film body, in particular the film body with the previously described reflective layer, is or will preferably be provided with a light source for radiating light, in particular into at least the first carrier component. The light source is applied in particular laterally, preferably on a side that does not form the rear and / or front side of the film body.

[0136] It is also possible for one or more decorative layers of the at least one decorative layer to be arranged between the first carrier film and the substrate and / or between the second carrier film and the substrate. Preferably, the at least one heating wire and / or the multi-core heating cable and the at least one decorative layer are arranged on a visible side of the substrate, in particular arranged together on a visible side of the substrate. The visible side of the substrate is in particular visible in the film body and / or faces the visible side of the film body.

[0137] The substrate is preferably multi-layered. The reflective layer preferably comprises or consists of PMMA. It is possible for the reflective layer to be provided as a film insert, in particular as a sheet or as a roll. Preferably, the substrate has one or more adhesive layers on the reflective layer, in particular an adhesive layer on each side. The at least one heating wire and / or the multi-core heating cable is or will preferably be applied to one of the adhesive layers and / or incorporated into it. The heating foil composite and / or the layer composite is or will also preferably be provided with a first carrier film, in particular on the visible side, and a second carrier film, in particular on the back, which in particular form outer surfaces of the heating foil composite and / or the layer composite and / or comprise or consist of PC.In steps b) and c), the first carrier film is preferably bonded directly to the second carrier component and / or the protective lacquer layer, and the second carrier film is preferably bonded directly to the first carrier component. This advantageously allows a particularly stable bond between the heating foil composite and / or the layer composite and the carrier components or the protective lacquer layer in the film body to be achieved. Optionally, one or more additional adhesive layers are or will be arranged on the first and / or second carrier film.

[0138] It is possible for the film body to be provided with at least one light guide layer. Light can be irradiated into the light guide layer and is at least partially reflected by the reflective layer, as already described above. The light guide layer preferably comprises one or more of the following materials: PC, PC derivatives, modified PC. The at least one light guide layer can in particular be the first carrier component. The reflective layer in particular comprises one or more of the following materials: PMMA, PMMA derivatives, modified PMMA. The reflective layer is or will preferably be applied with a layer thickness in a range from 2 pm to 200 pm, in particular 50 pm. The reflective layer is or will preferably be brought into contact with a radiation source, in particular an LED radiation source, and / or is or will be designed to be connectable thereto.

[0139] Thus, the film body produced can in particular be a headlight which has a cover element which is particularly permeable to light with wavelengths in a range from 380 nm to 780 nm and which has a heatable surface.

[0140] One or a combination of the following adhesive groups can be used as material for the one or more adhesive layers and / or the one or more further adhesive layers: solvent-based adhesives, dispersion adhesives, contact adhesives, plastisols, hot melt adhesives, chemically curing adhesives.

[0141] The at least one decorative layer is or will preferably be applied to the at least one carrier film, in particular the first carrier film and / or the second carrier film.

[0142] The at least one first decorative layer is or will preferably be applied to the front side and / or the back side of the carrier film. The at least one heating wire and / or the multi-core heating cable and the at least one decorative layer are or will preferably be applied to the same side of the carrier film and / or to opposite sides of the carrier film. The at least one decorative layer preferably comprises at least one first decorative layer and / or in particular at least one second decorative layer. It is particularly possible for the first decorative layer and / or the second decorative layer to be applied to the front side or the back side of the carrier film. It is particularly possible for the first decorative layer to be applied to the front side of the at least one carrier film and the one second decorative layer to be applied to the back side of the carrier film.It is also possible that the first decorative layer is or will be applied to the back of the carrier film and the second decorative layer to the front of the carrier film.

[0143] Preferably, one or more decorative layers of the at least one decorative layer, in particular the first and / or second decorative layer, are or will be applied in a motif-like manner and / or over the entire surface. The term "motif" or "motif-like" refers, for example, to one or more shapes selected individually or in combination from a geometric shape, guilloche pattern, continuous pattern, image, symbol, logo, coat of arms, portrait, alphanumeric characters, QR code, or barcode. A motif can be or will be formed as a single image and / or as a continuous pattern.

[0144] It is possible that one or more decorative layers of the at least one decorative layer, in particular the first and / or the second decorative layer, are or will be applied by means of one or more of the following methods: hot stamping, cold stamping, gravure printing, screen printing, inkjet printing, flexographic printing, digital printing, offset printing.

[0145] One or more of the at least one decorative layer, in particular the first and / or second decorative layer, are in particular selected from one or more of the following layers or layer structures: decorative layer with a continuous pattern, decorative layer with a single image, partial decorative layer, full-surface decorative layer, decorative layer on only one side, in particular the back or the front of the first carrier film, decorative layer on both sides, in particular the back and the front of the first carrier film, decorative layer comprising or consisting of metal, decorative layer with one or more preferably partial surface reliefs, decorative layer with a full-surface surface relief, reflective layer, in particular metal layer or HRI layer (HRI = High Refractive Index), replication layer, colored lacquer layer, in particular colored lacquer layer in full tone and / or colored lacquer layer in half tone, preferably colored lacquer layer with a printing screen.

[0146] Advantageously, by virtue of the fact that in the heating foil composite and / or in the layer composite the multi-core heating cable and optionally the at least one decorative layer and / or the at least one decorative layer and the at least one heating wire are or are first provided on the carrier foil, and then the heating foil composite and / or the layer composite is coated or encased on both sides with flowable materials, a foil body with improved heat conduction can be achieved, since, for example, air inclusions are avoided.

[0147] The second carrier component arranged on the visible side forms, for example, a lens, preferably of a headlight. The second carrier component can form the cover element, in particular of a headlight, or can be enclosed by a cover element. The first carrier component arranged on the rear side forms, for example, a contact surface or a holder for a radiation source and / or for installing the film body.

[0148] The at least one decorative layer preferably has at least one indium layer comprising or consisting of indium. The indium layer is or is preferably vapor-deposited. The indium layer is advantageously transparent to electromagnetic radiation, in particular for wavelengths in a range from 1 GHz to 150 GHz for radar applications and / or in a range from 350 THz to 850 THz for visible light. The indium layer is advantageously reflective to the human eye, in particular wavelengths in a range from 380 nm to 780 nm. The indium layer preferably forms islands, particularly during vapor deposition, which preferably produce the aforementioned effects.

[0149] The bonding in step iv) preferably comprises hot stamping. Preferably, one or more decorative layers of the at least one decorative layer are or will be applied as a transfer layer, preferably a hot stamping foil, preferably to the at least one carrier foil, in particular the first and / or second carrier foil. A hot stamping foil comprises, in particular, the transfer layer, which is detachably arranged on a carrier layer. A release layer can be provided between the transfer layer and the carrier layer.

[0150] A transfer layer comprises in particular one or more of the following layers:

[0151] - One or more release layers, preferably with a layer thickness in a range from 0.01 pm to 10 pm, preferably from 1 pm to 2 pm. One or more release layers of these release layers can be removed after transferring the transfer layer, in particular to the at least one carrier film, or can remain thereon and serve as a protective layer or as an adhesion promoter.

[0152] - One or more protective layers, preferably with a layer thickness in a range from 0.1 pm to 50 pm, more preferably from 1.5 pm to 35 pm. One or more protective layers of these protective layers can protect further transfer layer layers, particularly during the transfer of the transfer layer to the at least one carrier film, and optionally also serve as adhesion promoters in the layer composite, for example.

[0153] - One or more decorative layers, preferably with a layer thickness in a range from 0.2 pm to 20 pm, preferably from 1.5 pm to 7 pm. Such decorative layers can, for example, be a printed layer produced by printing on the transfer layer, or layers that are or will be applied, for example, by a hot or cold stamping process.

[0154] - One or more vapor-deposited layers, preferably with a layer thickness in a range of 5 nm to 200 nm, preferably 30 nm.

[0155] - One or more primer layers, preferably with a layer thickness in a range from 0.5 pm to 10 pm, preferably from 0.8 pm to 5 pm. One or more primer layers can enable sufficient adhesion of the at least one decorative layer to the at least one carrier film during the transfer of the transfer layer to the at least one carrier film.

[0156] The decorative layer is provided, for example, as a removable transfer layer of a hot stamping foil. In particular, the hot stamping foil is brought into contact with the first carrier foil, and the transfer layer is transferred to the first carrier foil using a heated embossing tool. For this purpose, the transfer layer can, for example, have a hot-melt adhesive layer. The transfer can be full-surface or motif-shaped. For this purpose, the embossing tool can, for example, have a full-surface or motif-shaped embossed surface. The embossed surface can be smooth and even or have a surface relief structure. For example, the surface relief structure can be a matte structure.

[0157] It is possible that one or more adhesive layers are or will be applied to bond the at least one decorative layer, in particular to the at least one carrier film, preferably to the first and / or second carrier film, and / or to further layers. These adhesive layers can already be included in a transfer layer or can be applied separately.

[0158] It is also conceivable that a hot stamping foil as described above is used as the IMD foil, for example in step b). It is also possible for one or more decorative layers of the at least one decorative layer to be a printing layer, preferably a printing varnish layer, and / or to be printed on. The bonding can in particular comprise one or more of the following steps for applying one or more decorative layers of the at least one decorative layer: gravure printing, screen printing, inkjet printing, flexographic printing, digital printing, offset printing. These one or more decorative layers can be applied over the entire surface and / or in the form of a motif. It is possible for the printing to already be carried out for the production of a transfer layer and / or, for example, to be carried out on the at least one carrier foil.

[0159] It is possible that the at least one decorative layer is or will be applied for the full-surface or partial lamination, in particular covering, of the at least one heating wire and / or the multi-core heating cable, in particular when viewing the visible side of the film body and / or the front side of the layer composite and / or the heating film composite.

[0160] It is also possible for the at least one decorative layer to be applied in such a way that the at least one heating wire and / or the multi-core heating cable, together with the at least one decorative layer, forms a decoration, for example by the at least one heating wire and / or the multi-core heating cable continuing one or more lines provided by the at least one decorative layer and / or picking up motifs and / or representing a partial design element and / or a partial design element being or being explicitly highlighted by its own coloring and / or a partial design element highlighting the technical aspect of the entire component. For example, it is possible for the decorative layer to have or be formed from a so-called “black piano” lacquer. It is conceivable for the at least one heating wire and / or the multi-core heating cable to be colored, in particular red.A "Black Piano" finish is specifically defined as a high-gloss, deep black finish. This finish preferably has a very thick layer of clear lacquer over a black lacquer layer, which preferably creates a depth effect.

[0161] It is also possible for the at least one heating wire and / or the multi-core heating cable to have one or more sheath layers. The one or more sheath layers preferably each at least partially enclose one heating wire or several heating wires of the at least one heating wire and / or the one or more further heating wires. This makes it possible, for example, to provide an enlarged contact surface, by means of which improved adhesion to surrounding layers in the film body is achieved. In addition, the sheath layers advantageously offer an increase in optical design options and the possibility of creating special optical effects. Furthermore, it is possible for the one or more sheath layers to insulate several heating wires or all heating wires of the multi-core heating cable, i.e., in particular, to galvanically separate them from one another.This can result in a multi-core heating cable with a high degree of flexibility, which can, for example, be formed into complex shapes, which, together with the optical effects, can be particularly advantageous.

[0162] One or more first sheath layers of the one or more sheath layers preferably have a first color. One or more second sheath layers of the one or more sheath layers preferably have a second color. The sheath layers having the first or second color are or will be arranged so as to be visible, at least in some areas, in the heating foil composite, in the layer composite and / or in the film body. The first color preferably differs from the second color. This makes particularly impressive optical effects possible. For example, it is possible to select the colors of the one or more sheath layers such that the multi-core heating cable has a locally iridescent color effect. In particular, different colors are thus visible from different viewing angles of the multi-core heating cable, preferably in the heating foil composite, in the layer composite and / or in the film body.If the multi-core heating cable has curves, the color changes and / or changes, for example, at least in certain areas, according to the curvature of the multi-core heating cable, particularly when viewed from the same angle relative to different areas of the multi-core heating cable and / or when viewing a section of the multi-core heating cable when changing from a first viewing angle to a second viewing angle. However, it is also conceivable for the one or more sheath layers to be the same color.

[0163] It is also possible for two or more first heating wires of the at least one heating wire and the one or more further heating wires to run parallel to one another and, for example, to have different colored sheath layers, in particular the first color and the second color. It is also possible for the sheath layers of these first heating wires or of two or more heating wires of the first heating wires to be the same color.

[0164] Preferably, one or more heating wires of the at least one heating wire and the one or more further heating wires, in particular the heating wires running parallel to one another, run straight at least in sections in the heating foil composite, in the layer composite and / or in the foil body.

[0165] Alternatively or additionally, it is possible for one or more second heating wires of the at least one heating wire and the one or more further heating wires to be twisted, in particular twisted around at least one other heating wire of the at least one heating wire and the one or more further heating wires, for example around one or more of the first heating wires. Twisted can be understood here in particular to mean wound, e.g. spirally, preferably helically. Differently colored sheath layers of at least one twisted heating wire and of a heating wire around which this twisted heating wire is twisted are conceivable, so that, for example, more complex locally iridescent color effects can be achieved. It is also conceivable for several heating wires to be twisted around one heating wire. Differently colored sheath layers of twisted heating wires and / or the same-colored sheath layers of twisted heating wires are preferred.It is also conceivable that, particularly in the case of a strip-shaped multi-core heating cable, a plurality of heating wires running parallel to one another are each connected to one another via a sheath layer, in particular a baked enamel layer, of one or more twisted heating wires which extend through a space between the heating wires running parallel to one another.

[0166] Preferably, in the multi-core heating cable, several outer heating wires are arranged around a centrally arranged inner heating wire, in particular evenly distributed around the inner heating wire. The outer heating wires can comprise one or more of the first and / or second heating wires. Preferably, there are four, five, or six, or at least four, or at least five, or at least six outer heating wires. It is possible for the outer heating wires and the inner heating wire to have the same cross-sectional dimensions, in particular the same diameter. It is also possible for one or more of the outer heating wires and the inner heating wire to have the same cross-sectional dimensions, in particular the same diameter.

[0167] Alternatively or additionally, it is possible for further outer heating wires to be arranged around the centrally arranged heating wire. Preferably, the further outer heating wires are arranged evenly distributed around the inner heating wire and / or the number of outer heating wires corresponds to the number of further outer heating wires. The further outer heating wires can have a larger or smaller diameter than the outer heating wires. Preferably, a heating wire of the further outer heating wires is arranged between two of the outer heating wires. The further outer heating wires can comprise one or more of the first and / or second heating wires. It is also possible for several heating wires to run parallel to one another and for one or more heating wires, in particular of the second heating wires, to be twisted around the heating wires running parallel to one another.

[0168] Alternatively or additionally, it is possible for the multi-core heating cable to have an axially symmetrical and / or rotationally symmetrical cross-section and / or to be band-shaped. In particular, the axially symmetrical and / or rotationally symmetrical cross-section has varying widths, i.e., it is preferably not circular, like a single wire. Band-shaped means, in particular, that the cross-sectional width is at least twice, preferably at least three times, the height of the multi-core heating cable. The multi-core heating cable can, for example, be a multi-core flat stranded wire.

[0169] It is possible for at least one sheath layer or all sheath layers of the one or more sheath layers to have an insulation layer and / or a baked enamel layer. It is therefore possible for the multi-core heating cable to have one or more insulation layers and / or one or more baked enamel layers. Preferably, an insulation layer is arranged directly on a respective heating wire and / or closer to a respective heating wire than the baked enamel layer. A baked enamel layer is preferably a layer which envelops the respective heating wire and / or the respective insulation layer and can be or combines to form a matrix, preferably as a result of exposure to temperature and / or during a preferably subsequent exposure to temperature. The respective heating wire and / or the respective heating wires are or will then preferably be embedded in this matrix.One or more outer layers of the multi-core heating cable are preferably formed by one or more baked enamel layers.

[0170] An insulation layer provides, in particular, electrical insulation for one or more heating wires of the at least one heating wire and / or the one or more further heating wires. A baked enamel layer is understood, in particular, to mean at least one layer that can be combined to form a matrix as a result of and / or upon exposure to temperature. The respective heating wire and / or the respective heating wires are or will preferably be embedded in this matrix. The one or more cladding layers, in particular their insulation layers and / or their baked enamel layers, can be applied around the respective heating wire by means of a method selected individually or in combination from: dip coating, nozzle coating, spray coating, vapor deposition.

[0171] The one or more sheath layers, in particular the one or more baked enamel layers, preferably connect the heating wires of the multi-core heating cable covered thereby to one another, preferably in a materially bonded manner. The connection is made in particular via contact points and / or contact surfaces of two or more of the one or more sheath layers. Such a connection is preferably present when the multi-core heating cable is applied to the at least one carrier foil by means of a sonotrode. This advantageously enables reliable feeding to the sonotrode and / or passage through the sonotrode of the multi-core heating cable. Furthermore, it is possible to fasten the multi-core heating cable to the at least one carrier foil by means of at least one sheath layer, in particular to connect it to it in a materially bonded manner. This is done, for example, by melting using the ultrasonic sonotrode.

[0172] The multi-core heating cable has, in particular, one or more leveling layers. In particular, a leveling layer compensates for one or more elevations and / or depressions formed, for example, by the one or more sheath layers. This makes it possible for the multi-core heating cable to have a surface and / or outer surface with a flat surface and / or with a surface that is smoother than a surface formed by one or more sheath layers. Furthermore, the stability of the multi-core heating cable can be improved. The one or more leveling layers preferably have one or more adhesive layers, which can, in particular, ensure improved adhesion of the multi-core heating cable, and / or one or more decorative layers, which can, in particular, produce additional optical effects, for example, depth effects and / or optically variable effects.An optically variable effect is understood here to mean, in particular, an effect with defined different optical appearances under defined different viewing situations, in particular different viewing angles.

[0173] The one or more leveling layers are, in particular, lacquer layers. Preferably, the one or more leveling layers, in particular the one or more decorative layers, are transparent and / or colorless and / or colored. The one or more leveling layers can, for example, have a third color that differs from the first and / or second color or that corresponds to the first color and / or the second color. Alternatively or additionally, it is possible for the one or more leveling layers to have one or more replication layers, which are or will be provided, in particular, with a surface structure, preferably a microstructure.

[0174] In a multi-core heating cable that is strip-shaped, a first leveling layer is or will preferably be provided on a first side of the multi-core heating cable, in particular such that the leveling layer extends along a surface that is parallel to a surface spanned by a longitudinal direction of a heating wire and a direction that connects a plurality of center lines of the heating wires. Furthermore, it is possible for a second leveling layer to be or will be provided on a second side of the multi-core heating cable opposite the first side. It is possible for the first leveling layer to have the third color and / or the second leveling layer to have the third color and / or a fourth color that differs from the first and / or second and / or third color or corresponds to the first and / or second and / or third color.It is also possible for one or more recesses and / or structures to be provided in the one or more cladding layers and / or the one or more leveling layers, in particular in the first and / or second leveling layer, which are in particular motif-shaped, for example having the shape of one or more lines, lettering and / or a logo. A motif formed by the one or more recesses and / or structures can, for example, also extend over several cladding layers, which is particularly preferred for a ribbon-shaped multi-core heating cable. The one or more recesses and / or structures are or will preferably be produced by laser ablation, preferably after step iv) and / or after step IV) and / or during step a), and / or by laser blackening, for example before or after one of steps b) and c).This allows the design options to be further improved and, for example, film bodies with short set-up times can be provided with individualized multi-core heating cables.

[0175] It is also possible to expose one or more regions of the at least one heating wire and / or the one or more further heating wires by means of the one or more cutouts, in particular so that a metal used for the heating wires is visible in the heating foil composite, in the layer composite and / or in the foil body and / or contributes to a visible effect. In particular due to regions in which the respective sheath layers are retained, the heating wires are preferably spaced apart from one another. Advantageously, this makes it possible, for example, to use the optical effect of the metallization of the heating wire in certain regions without having to accept additional material and / or an increase in the thickness of the multi-core heating cable. It is also conceivable to combine such cutouts and / or structuring with several differently colored sheath layers.In a preferred embodiment of the film body, lens structures can be or will be provided in the film body, preferably for the enlarged representation of motifs and / or color effects provided by means of the multi-core heating cable, in particular for the enlargement of one or more motifs formed by the one or more recesses and / or structurings, for example a logo, and / or of one or more motifs and / or color effects formed by the first, second, third and / or fourth color and / or of surface structures of the one or more lateral surfaces. Such lens structures can be or will be provided in particular in one or more of the following layers and / or components: the first carrier component, the second carrier component, the protective lacquer layer, the baked lacquer layer.The lens structures are preferably produced by stamping processes and / or embossing processes and / or replication processes and / or laser structuring processes.

[0176] The enlarged image can be localized, meaning, in particular, that partial areas of the multi-core heating cable are enlarged. The enlarged image can be further emphasized by partial backlighting, for which purpose a backlighting device can be provided in the film body, and / or by subsequently applied lens structures.

[0177] The one or more sheath layers preferably comprise or consist of one or more of the following materials: polyester, polyacrylate, PMMA, melamine, melamine formaldehyde resins, epoxy acrylates, polyether acrylates, polyester acrylates, acrylates, epoxy polymethacrylate, polyurethane, polystyrene, polybutyrate, nitrocellulose, polyvinyl chlorides, ethylene vinyl acetates, their copolymers or similar polymers, additives, fillers, pigments, dyes.

[0178] The one or more insulation layers preferably comprise or consist of one or more of the following materials: polyester, polyacrylate, PMMA, melamine, melamine formaldehyde resins, epoxy acrylates, polyether acrylates, polyester acrylates, acrylates, epoxy polymethacrylate, polyurethane, polystyrene, polybutyrate, nitrocellulose, polyvinyl chlorides, ethylene vinyl acetates, their copolymers or similar polymers, additives, fillers, pigments, dyes.

[0179] The one or more bonding varnish layers preferably comprise or consist of one or more of the following materials: thermosetting water-based hot melt adhesives, thermosetting solvent-based hot melt adhesives, epoxy resins, epoxy resin mixtures.

[0180] The one or more leveling layers preferably comprise or consist of one or more of the following materials: polyester, polyacrylate, PMMA, melamine, melamine formaldehyde resins, epoxy acrylates, polyether acrylates, polyester acrylates, acrylates, epoxy polymethacrylate, polyurethane, polystyrene, polybutyrate, nitrocellulose, polyvinyl chlorides, ethylene vinyl acetates, their copolymers or similar polymers, additives, fillers, pigments, dyes.

[0181] The one or more cladding layers preferably have a layer thickness in a range from 0.5 pm to 100 pm. The one or more insulation layers preferably have a layer thickness in a range from 0.5 pm to 100 pm. The one or more bonding lacquer layers preferably have a layer thickness in a range from 0.5 pm to 100 pm. The one or more leveling layers preferably have a layer thickness in a range from 1 pm to 500 pm.

[0182] There is preferably a minimum distance in a range of 0.5 pm to 10 pm between two or more heating wires of the at least one heating wire and the one or more further heating wires. There is preferably a maximum distance in a range of 10 pm to 500 pm between two or more heating wires of the at least one heating wire and the one or more further heating wires and / or the multi-core heating cable has a width and / or a diameter in a range of 10 pm to 500 pm. The width and / or the diameter is measured in particular in the cross-section, preferably with the smallest surface area. Depending on the direction of measurement, the width of the cross-section of the multi-core heating cable can vary.

[0183] It is preferred that the at least one heating wire and / or the one or more additional heating wires consist of copper or comprise copper, in particular predominantly, i.e., preferably more than 50 percent by mass, more preferably more than 95 percent by mass. This allows the use of a particularly inexpensive and readily available material. As already explained above, by adapting the multi-core heating cable, for example, sufficient heating power can be achieved with inexpensive materials and special optical effects.

[0184] It is preferably possible for the multi-core heating cable to have 2 to 10 heating wires. Alternatively or additionally, it is preferred that in the multi-core heating cable, the sum of the minimum widths and / or the sum of the diameters of all heating wires of both the at least one heating wire and the one or more additional heating wires is at least 50 μm, preferably at least 80 μm and / or a maximum of 1000 μm, preferably a maximum of 120 μm. The diameter refers in particular only to the conductive material of the heating wires. The total resistance, which can be calculated in particular using the resistances of the heating wires of both the at least one heating wire and the one or more additional heating wires, is preferably at least 0.5 Ω, preferably at least 22 Ω, and / or a maximum of 1000 Ω, preferably a maximum of 137 Ω. The multi-core heating cable preferably has a length of at least 0.5 m and / or a maximum of 250 m, for example a length of 4 m.

[0185] It is also possible for one or more heating wires of the one or more further heating wires to have a first diameter and one or more heating wires of the one or more further heating wires to have a second diameter, wherein the first diameter differs from the second diameter and is located on the inside. The first diameter is preferably in a range from 100% to 500% of the second diameter, for example 150% of the second diameter. Advantageously, thin heating wires can thus be used, for example to provide fine surface structures and / or fine color differences on the surface of the multi-core heating cable. In this way, sufficient heating output can be achieved, while burning through thin wires is avoided by having thicker wires with lower resistance connected in parallel with them.

[0186] The at least one heating wire preferably also has the second diameter or a diameter that is larger than the second diameter. It is possible for the same number of heating wires to be present with the first diameter and the same number of heating wires with the second diameter. Alternatively or additionally, it is possible for the number of heating wires with the first diameter and / or the number of heating wires with the second diameter to be in a range from 1 to 10, for example, 4.

[0187] The layer composite and / or the heating foil composite, in particular the first composite, and / or the at least one carrier foil preferably has a passive heating layer or is provided or provided with a passive heating layer. The passive heating layer has, in particular, low transparency for infrared radiation and / or is opaque to infrared radiation and / or absorbs infrared radiation. Thus, the passive heating layer can be heated, for example, by sunlight and thus, in particular, support the heating and advantageously reduce the necessary heat output of the heating wire. It is also possible for the passive heating layer to be advantageously arranged such that the thermal radiation emitted by the heating wire is at least partially absorbed by the passive heating layer and is thus directed, preferably more homogeneously and / or with greater intensity, towards the surface to be heated in the foil body.The passive heating layer is preferably arranged behind the one or more decorative layers from the visible side. The passive heating layer preferably comprises or consists of one or a combination of the following materials: organic and / or inorganic layers, inorganic layers, organic pigments, inorganic pigments, polymers, active substances, nanotubes. The passive heating layer can, in particular, also have a surface structure that supports the absorption effect, for example, as matte structures or moth-eye structures, especially with a high depth-to-width ratio.

[0188] Preferably, a contacting element is or will be provided in the layer composite and / or the heating foil composite, in particular the first composite, and / or a contacting element is exhibited by the at least one carrier foil. It is thus possible for the foil body and / or the layer composite and / or the heating foil composite, in particular the first composite, to be or will be provided with a contacting element. The contacting element, in particular of the layer composite and / or the heating foil composite, in particular the first composite, and / or the foil body, is or will preferably be designed to be freely accessible at least in some regions, preferably designed to be freely accessible after step iv) and / or after step IV) and / or after step b) and / or after step c). In particular, the at least one heating wire and / or the multi-core heating cable can be electrically contacted by means of the contacting element.It is also possible for the at least one heating wire and / or the multi-core heating cable to be contactable and / or to be contacted by means of a soldering point, i.e. in particular to be connectable and / or to be connected to an energy source and preferably to a control unit. The multi-core heating cable preferably has a contact point at one or both ends, in particular by means of a soldering point, at which contact point several or all heating wires of the at least one heating wire and the one or more further heating wires are galvanically connected and / or electrically conductively contacted with one another. It is possible for the soldering point to be created before and / or during one of the following steps: step a), step 1), step i), and / or for the soldering point to be created after one of the following steps: step iv, step IV), step b), step c). Preferably, a soldering station is guided automatically to create the soldering point, in particular by means of a robot arm.Preferably, in a previous step, for example, by laser ablation, a portion of the heating wires at one end or both ends of the multi-core heating cable is exposed by removing one or more sheath layers in a region. For this purpose, a laser unit is used, which is guided automatically, in particular by a robotic arm.

[0189] The contacting element is or will be designed in particular such that it is suitable for electrically contacting the at least one heating wire and / or the multi-core heating cable. During the production of the film body, the contacting element remains free of the first and second carrier components, particularly at least in one contacting area.

[0190] It is possible for the contacting element to be formed with at least one end, in particular two ends, of the at least one heating wire and / or the multi-core heating cable and / or at least one end of the at least one heating wire and / or the multi-core heating cable provided with a contact reinforcement, in particular two ends of the at least one heating wire and / or the multi-core heating cable, which are preferably each provided with a contact reinforcement. Such contact reinforcements advantageously provide both an enlarged contact surface and mechanical reinforcement in the contacting region.Alternatively or additionally, it is possible for the contacting element to be or be formed with one or more of the following layers: at least one electrically conductive layer, in particular comprising or consisting of one or more materials selected individually or in combination from Cu, Ag, Au, Zn, at least one electrically insulating layer, at least one adhesion promoter layer, at least one anti-adhesion layer. The contacting element can be or be glued on, in particular by means of electrically conductive adhesive, preferably at least to the at least one heating wire and / or the multi-core heating cable. The contacting element is or will be brought into contact with the at least one heating wire and / or the one or more further heating wires, preferably partially between two layers of the heating foil composite and / or layer composite, in particular before step iv) and / or before step IV) and / or step a).

[0191] Within the contacting region, the contacting element comprises in particular at least the at least one carrier film, in particular the first carrier film or the second carrier film, as well as the at least one heating wire and / or the one or more further heating wires. The heating wire and / or the one or more further heating wires can thus be led out of the body provided with the first and second carrier components via the at least one carrier film. Optionally, it is possible for the contacting element to have the at least one decorative layer in regions or over the entire surface, for example if one or more decorative layers of the at least one decorative layer is or will be applied over the entire surface or almost the entire surface to the at least one carrier film or another layer of the layer composite.

[0192] The contacting region can be formed, for example, by a region that is not accessible to the first and / or second flowable composition during step b) and / or c), for example by means of a corresponding cavity of an injection molding tool, in particular the first and / or second tool mold and / or the first and / or second gap mold and / or one or more metallic inserts for adapting the cavity. Alternatively or additionally, it is possible for the contacting region to be formed by a region that is not accessible to the first and / or second flowable composition during step b) and / or c), by means of the gap of the device.Alternatively or additionally, it is also possible, in particular after steps b) and / or c), to free up an area of ​​the film body while preserving the contacting area, for example by means of grinding, milling, drilling, cutting, punching, etching, chemical removal and / or laser ablation.

[0193] It is expedient that at least one outer surface of the contacting element is or will be formed by an anti-adhesion layer in some regions. The at least one anti-adhesion layer advantageously forms at least one outer surface of the contacting element. During production of the film body, this outer surface can be brought into contact with a tool mold, in particular with the first and / or second gap mold, so that the contacting element can be or will be designed, at least in some regions, not in the cavity and / or at least in some regions free of the first carrier component and the second carrier component. In this case, damage-free detachment from the first and / or second gap mold can advantageously be achieved by means of the anti-adhesion layer.

[0194] The device is, in particular, an injection molding device. It is possible for the device to have one or more injection channels for introducing the first and / or second and / or third flowable injection molding compound into the cavity.

[0195] It is possible for the second gap mold and the second mold to be formed at least partially by a monolithic component. A monolithic component is understood, in particular, to be a component that consists of a single piece and / or has no detachable connection. It is also conceivable for component halves, in particular a monolithic component, to be inserted into the cavity and then back-injected in conjunction with the said film body.

[0196] It is possible for the first gap shape and the second gap shape to be designed such that, in the closed state, the gap has a first cross-sectional area and a second cross-sectional area, wherein the first cross-sectional area is arranged closer to the cavity and has a smaller surface area than the second cross-sectional area. The first gap shape and / or the second gap shape are each designed, in particular, as a tool insert for forming part of a corresponding cavity half. Preferably, the first and second gap shapes form, at least in part or completely, a contact edge of both cavity halves. Preferably, the gap is or will be designed, in the closed state, according to the geometry of the contacting element. The tightness of the gap is preferably ensured as part of a seal for the cavity.The gap is preferably adapted exactly to the thickness of the contacting element so that the gap is left wide enough that the contacting element is not mechanically destroyed, e.g. crushed or sheared off, when the mold is closed, and at the same time the gap is narrow enough that the first gap shape and the second gap shape lie close to the contacting element in order to seal the cavity together with the contacting element, in particular even at the high pressures and temperatures during back-injection molding. For this purpose, it is advantageous if at least one of the gap shapes is not formed integrally with the respective tool mold, but rather forms an exchangeable module which can be adapted accordingly so that the gap can be adjusted to different thicknesses of the tail.

[0197] In particular, when viewed perpendicular to the first cross-sectional area and the second cross-sectional area, the first cross-sectional area is completely surrounded by the second cross-sectional area. Preferably, when viewed perpendicular to the first cross-sectional area, a first region of the gap is spanned, preferably with a constant cross-section and / or a defined length, for example in a range from 3 cm to 350 cm. In particular, when viewed perpendicular to the second cross-sectional area, a second region of the gap is spanned, preferably with a constant or spatially varying cross-section and / or a defined length, for example in a range from 3 cm to 350 cm. This makes it possible, in particular, to generate high pressure and thus a strong sealing effect at the cavity, which, for example, enables a compact design of the device and increased process reliability.Preferably, the detachable connection is introduced into a cavity with the second cross-sectional area.

[0198] This has the particular advantage of allowing easy adjustment of the gap with a more compact and lightweight design, thus saving capacities and resources for the manufacture of the device as well as during operation of the device.

[0199] It is possible for the device to comprise an ultrasonic sonotrode which is configured in particular such that the heating wire can be introduced into a layer of the layer composite and / or the multi-core heating cable into a layer of the heating foil composite and / or the layer composite.

[0200] The invention is explained below using several exemplary embodiments with the aid of the accompanying drawings. In the drawings:

[0201] Fig. 1 to 9 schematic representations of a layer composite and a film body,

[0202] Fig. 10 schematically shows a process,

[0203] Fig. 11 to 13 schematic representations of a layer composite,

[0204] Fig. 14 schematically shows a section of a device,

[0205] Fig. 15 schematically shows a device,

[0206] Fig. 16 schematically shows a heating wire,

[0207] Fig. 17 to 20 schematic representations of a multi-core heating cable,

[0208] Fig. 21a and 21b schematically show a method for producing contact points, and Fig. 22 is a schematic representation of a heating foil composite and a foil body.

[0209] Fig. 1 shows a schematic cross section of a film body 100. The film body 100 has a first carrier component 1, a layer composite 2 and a second carrier component 3. The layer composite 2 is preferably produced according to the method according to the invention for producing a layer composite. The layer composite 2 is preferably suitable for use in a method for producing a film body 100 and / or is used in such a method, in particular wherein the layer composite 2 is provided with the first carrier component 1 and the second carrier component 3 and the film body 100 is thus obtained. The layer composite 2 is in particular an insert element. The insert element can, for example, be inserted into a cavity of an injection molding device, in particular the device according to the invention, in the method for producing the film body 100.The layer composite 2 is in particular an insert element for carrying out steps b) and c), which is provided in step a).

[0210] The layered composite 2 has at least one carrier film, which is illustrated in Fig. 1 by way of example by the first carrier film 20. Furthermore, the layered composite 2 has at least one decorative layer, which is illustrated in Fig. 1 by way of example by the first decorative layer 22. In addition, the layered composite 2 has at least one heating wire, which is illustrated in Fig. 1 by way of example by the heating wire 21. The at least one heating wire 21 has a minimum width and / or a smallest diameter of 50 μm. The at least one heating wire 21 also has a minimum cross-sectional area of ​​2500 μm. 2 which is particularly measurable in a cross-section as shown in Fig. 1.

[0211] The at least one carrier film 20, the at least one decorative layer 22, and the at least one heating wire 21 are connected to one another, preferably by a material bond. It is conceivable to provide additional layers, such as adhesive layers or adhesive layers, between the layers of the layered composite 2.

[0212] The heating wire 21 can, in particular in the embodiments shown in Fig. 1 and Fig. 2, be arranged in different ways on and / or in the decorative layer 22 and / or on and / or in the carrier film 20. This different arrangement can depend on one or more of the following conditions: energy input when attaching the heating wire 21 to the respective base, the material of the carrier film 20, the material of the heating wire 21, the minimum width and / or smallest diameter of the heating wire 21, the cross-sectional shape of the heating wire 21, the residence time of the energy input when attaching the heating wire 21 to the respective base, the thermal conductivity of the heating wire 21, the thermal conductivity of the decorative layer 22, the thermal conductivity of the carrier film 20.

[0213] This different arrangement of the heating wire 21 can be, for example, as follows: a) the heating wire 21 can be embedded in the carrier film 20 and in the decorative layer 22 or b) the heating wire 21 can only be embedded in the decorative layer 22 or c) the heating wire 21 can be in the decorative layer 22 and, depending on the location, partially embedded in the carrier film 20 or d) the heating wire 21 can lie on the decorative layer 22 and be only partially embedded in the decorative layer 22 and not be embedded in the carrier film 20.

[0214] The layered composite 2 can be obtained by the method for producing a layered composite. The method comprises the steps: i) providing at least one carrier film, which in Fig. 1 comprises, by way of example, the first carrier film 20, ii) providing at least one decorative layer, which in Fig. 1 comprises, by way of example, the first decorative layer 22, iii) providing at least one heating wire, which in Fig. 1 comprises, by way of example, the heating wire 21, wherein the heating wire 21 has a minimum width and / or a smallest diameter of 50 μm and a minimum cross-sectional area of ​​2500 μm 2 and iv) connecting, preferably by material bonding, the at least one carrier film, in particular the first carrier film 20, the at least one decorative layer, in particular the first decorative layer 21, and the at least one heating wire, in particular the heating wire 21.

[0215] It is possible that ultrasound is used for connecting the at least one heating wire, in particular the heating wire 21, in step iv), as described in particular further above.

[0216] The bonding iv) preferably comprises hot stamping one or more decorative layers of the at least one decorative layer, in particular the first decorative layer 21, preferably onto the at least one carrier film 20. The decorative layer 21 is provided, for example, as a removable transfer layer of a hot stamping foil. In particular, the hot stamping foil is brought into contact with the first carrier film 20 and the transfer layer is transferred to the first carrier film 20 by means of a heated embossing tool. For this purpose, the transfer layer can, for example, have a hot-melt adhesive layer, which is, for example, brought into contact with the carrier film 20 and subsequently the transfer layer is released from the hot stamping foil. The transfer can take place over the entire surface or in the form of a motif. For this purpose, the embossing tool can, for example, have a full-surface or motif-shaped embossed surface.The embossed surface can be smooth and flat or have a surface relief structure. For example, the surface relief structure can be matte.

[0217] It is also possible for one or more decorative layers of the at least one decorative layer, in particular the decorative layer 22, to be and / or to be printed with a full-surface and / or motif-shaped print layer, preferably a print varnish layer. For bonding in step iv), such print layers can be applied, in particular, to the at least one carrier film using one or more of the following steps: gravure printing, screen printing, inkjet printing, flexographic printing, digital printing, or offset printing. The print layers can also first be produced in a transfer layer of a transfer film, in particular hot stamping foil, and bonded to the at least one carrier film using the transfer layer.

[0218] Fig. 1 shows in particular a visible side 101 and a rear side 102. The terms rear side and front side are to be understood in particular as opposite sides, in particular as opposite sides of a respective layer or of the layer composite 2. Preferably, a front side of a respective layer or of the layer composite 2 or of parts thereof faces the visible side 101 and a rear side of a respective layer or of the layer composite 2 or of parts thereof faces away from the visible side 101. The rear side of the first carrier film 20 is or will be provided in particular as a side of the carrier film 20 facing away from the visible side 101 of the film body 100. The first decorative layer 22 is or will be arranged in particular on a rear side of the first carrier film 20. The front side of the first carrier film 20 is or will be provided in particular as a side of the carrier film 20 facing the visible side 101 of the film body 100. From the visible side 101 orOn this side, the film body 100 is viewed, in particular in an installed state, and / or the film body 100 and the layer composite 2 are or will be designed for viewing this visible side 101. The visible side of the film body 100 is therefore to be understood in particular as the part of the film body 100 visible from the visible side 101.

[0219] It is possible that, alternatively or in addition to the first decorative layer 22, one or more further decorative layers, such as in particular the second decorative layer 23, is or will be arranged on the back of the carrier film 20. This is illustrated in particular by way of example with reference to Figs. 2, 4, 5 and 6. As illustrated by way of example in one of Figs. 7, 8 and 9, it is also possible that the first decorative layer 22 and / or a second decorative layer 23 are or will be arranged between a first carrier film 20 and a second carrier film 201, that is to say are or will be arranged on a front side of a second carrier film 201 and / or a back side of a first carrier film 20. As can be seen from Figs. 1 and 2, for example, the second decorative layer 23 does not necessarily require the first decorative layer 22 to be present.

[0220] As is exemplified by Fig. 1, it is possible for the film body 100 to comprise the carrier film 20, the decorative layer 22 and the heating wire 21 with a minimum width and / or a smallest diameter of 50 pm and a minimum cross-sectional area of ​​2500 pm 2 comprises, in particular in the form of the layer composite 2, and the first carrier component 1 and the second carrier component 3. Optionally, a protective lacquer layer in the film body

[0221] 100 may be or will be provided. It is particularly possible that instead of the second carrier component 3 or in addition to the second carrier component 3, preferably on the second carrier component 3, in particular on the visible side

[0222] 101 of the second carrier component 3, a protective lacquer layer is or will be provided. The second carrier component 3 and / or the protective lacquer layer is thus formed in particular on a visible side of the film body 100. The layer composite 2 can preferably be or will be produced independently of the film body 100 and, for example, be temporarily stored and / or transported before the film body 100 is produced with the layer composite 2. However, it is also conceivable that the layer composite 2 only arises as a result of the method for producing the film body 100 and / or that one or more components from the at least one decorative layer, the at least one carrier film and the at least one heating wire are provided individually in the method for producing the film body 100 and, for example, are only connected to one another by means of the first carrier component 1.

[0223] The surface of the film body 100, in particular of the second carrier component 3 and / or the protective lacquer layer not shown here, forms, in some regions or over its entire surface, the heatable surface of a cover element that is particularly permeable to electromagnetic waves. It is possible for the layer composite 2 to be connectable or to be connected to a radiation source, as explained by way of example in particular with regard to the optional embodiments of Figs. 7 to 9. The cover element is therefore formed in particular by at least the second carrier component 3 and / or the protective lacquer layer not shown here. It is also possible for the cover element to be or to be additionally formed by the layer composite 2 or by the entire film body 100.It is particularly possible for the film body 100, in particular on the back side 102, to have a radiation source or to be connectable thereto, preferably wherein the cover element is formed by the first carrier component 1, the layer composite 2 and the second carrier component 3 and / or the protective lacquer layer.

[0224] The film body 100 is produced in particular using the method for producing the film body. The method for producing the film body 100 with a heatable surface of a cover element that is permeable in particular to electromagnetic waves comprises the following steps. a) Providing at least one carrier film, such as the first carrier film 20 described by way of example with reference to one of FIGS. 1 to 9 and / or the first carrier film 20 described by way of example with reference to one of FIGS.

[0225] 7 to 9, at least one decorative layer, such as the first decorative layer 22 and / or second decorative layer 23 described by way of example with reference to one of Figs. 1 to 9, and at least one heating wire, such as the heating wire 21 described by way of example with reference to one of Figs. 1 to 9, wherein the heating wire 21 has a minimum width and / or a smallest diameter of 50 pm and a minimum cross-sectional area of ​​2500 pm 2b) back-injection or back-flooding of the at least one carrier film, such as the first carrier film 20 described by way of example with reference to one of Figs. 1 to 9 and / or the second carrier film 201 described by way of example with reference to one of Figs. 7 to 9, the at least one decorative layer, such as the first decorative layer 22 and / or second decorative layer 23 described by way of example with reference to one of Figs. 1 to 9, and the at least one heating wire, such as the heating wire described by way of example with reference to one of Figs.1 to 9, in particular back-injection or back-flooding of a rear side of the layer composite 2, with a first flowable composition to obtain the first carrier component 1, in particular on the rear side of the film body 100; c) applying a second flowable composition to a front side starting from the at least one carrier film, in particular the first carrier film 20 and / or the second carrier film 201, preferably of the layer composite 2, to obtain the second carrier component 3 on a visible side of the film body 100. Alternatively or additionally, a protective lacquer layer can be obtained on a visible side of the film body 100 by applying a second flowable composition, in particular by flooding and / or over-painting.It is also possible that a third flowable composition is used for the flooding and / or overcoating, in particular wherein this is applied to the second carrier component 3, which is preferably obtained from the second flowable composition.

[0226] The steps can be performed in the specified order. It is also conceivable for step a) to occur only after step b), in that the layered composite is obtained in step b). Preferably, the provision of the at least one decorative layer, the at least one carrier film, and the at least one heating wire can be carried out in the form of the layered composite 2, which is back-injected or back-flooded, preferably on its rear side, in step b).

[0227] Not shown, but also possible, in particular, is that in step a) the first carrier film 20 and the at least one heating wire 21 are provided in the form of a first composite, wherein the first decorative layer 22 is firmly integrated into the layer composite 2 and / or into the film body 100 in step b) or in step c), in particular by an IMD process. In this case, the carrier film 20 together with the heating wire 21 and the decorative layer 22 are preferably arranged on opposite sides of a cavity and the first carrier component 1 is formed therebetween. Step b) can be carried out in particular with the materials of the above embodiments. In this example, PC is preferred for the first flowable composition.

[0228] Step c) can be carried out, in particular, with the materials described above. In this example, PC is preferred for the second flowable composition for overspraying, and / or PUR is preferred for flooding, and / or a 2K paint is preferred for overcoating.

[0229] In the layer composite 2 described in relation to Fig. 1, preferably after the at least one decorative layer, in particular the first decorative layer 22, has been applied, the at least one heating wire is placed and / or inserted onto the at least one decorative layer, in particular the first decorative layer 21. The at least one heating wire 21 is thus arranged on the front side of the layer composite 2 and / or the visible side 101 of the film body 100 and covers, in particular when viewing the layer composite 2 or the film body 100, preferably from the visible side, the at least one decorative layer, in particular the first decorative layer 22. The application of the at least one decorative layer, in particular the first decorative layer 22, is or will be carried out by means of gravure printing, screen printing, hot stamping, cold stamping, inkjet printing, flexographic printing, digital printing, or offset printing.Subsequently, to produce the film body 100, the back side is or will be back-injected, for example with a first flowable composition comprising or consisting of PC, and the front side of the layered composite 2 is or will be flooded, for example with a second flowable composition comprising or consisting of PU, and / or the front side of the layered composite 2 and optionally the second carrier component 3 obtained by flooding is or will be over-painted, for example with a third flowable composition, which is, for example, a lacquer, preferably a clear lacquer, which preferably comprises or consists of acrylates. It is possible for the steps for back-injecting or flooding the first, second and / or third flowable composition and / or all flooding process steps to be carried out in one device.It is possible that a cavity is formed in each case for introducing the first, second and / or third flowable composition, preferably by two mold halves, in particular wherein by exchanging at least one of the mold halves, for example after step b), preferably a first back-injection or back-flooding, the cavity is changed or a different cavity is created, so that then, for example, step c) can take place with this other cavity, in particular a further back-injection and / or flooding can take place into this other cavity. This can also be done several times in succession by exchanging at least one mold half in each case. This can enable high process reliability and low costs. Subsequent printing steps and / or painting steps are preferably carried out outside the cavity.

[0230] A particular advantage of a layered composite 2 and film body 100 as described by way of example in FIG. 1 is that the at least one heating wire 21 can be arranged particularly close to the upper side of the part, and thus preferably at least a portion of the generated heat can reach the heatable surface without first heating the at least one carrier film. Advantageously, the film body 100 has the at least one heating wire directly adjacent to the second carrier component 3 and / or the protective lacquer layer, and / or the layered composite 2 has the at least one heating wire 21 on an exposed surface on a front side of the layered composite 2.

[0231] As illustrated by way of example in Fig. 2, it is also possible for one or more decorative layers of the at least one decorative layer, in particular the second decorative layer 23, and the at least one heating wire 21 to be arranged on the same side, in particular the back side, of the at least one carrier film, in particular the first carrier film 20. Preferably, the at least one decorative layer, in particular the second decorative layer 23, is or will be arranged on the back side of the at least one carrier film, preferably the first carrier film 20, and the at least one heating wire 21 is arranged on a back side of the at least one carrier film, preferably the first carrier film 20, and in particular is introduced into the at least one decorative layer, preferably the second decorative layer 23, and the at least one carrier film, preferably the first carrier film 20.Thus, a decoration is visible through the at least one carrier film from the front side of the layer composite 2 and / or the visible side of the film body 100. It is possible for the at least one heating wire to penetrate or have penetrated into the at least one decorative layer and the at least one carrier film with a penetration depth in a range of 50% to 80% of its minimum width and / or its thickness in the direction of the layer thickness of the at least one decorative layer and / or the at least one carrier film. In this case, the at least one heating wire penetrates, in particular, the layer thickness of the at least one decorative layer. In particular, it is possible for the at least one heating wire to have a thickness in the direction of the layer thickness of the at least one decorative layer that is at least 5 times, preferably at least 20 times, the layer thickness of the at least one decorative layer. The heating wire can thus advantageously be used as a decoration.At the same time, it is possible to additionally provide a distance optimized for heat distribution by means of at least one carrier film.

[0232] As illustrated by way of example in Fig. 3, it is also possible for one or more decorative layers of the at least one decorative layer, in particular the first decorative layer 22, and the at least one heating wire 21 to be arranged on opposite sides of the at least one carrier film, in particular the first carrier film 20. Preferably, the at least one decorative layer, in particular the first decorative layer 22, is or will be arranged on the front side of the at least one carrier film, preferably the first carrier film 20, and the at least one heating wire 21 is or will be arranged on a rear side of the at least one carrier film, preferably the first carrier film 20. In this case, it is possible for the at least one heating wire to be applied to and / or introduced into the at least one carrier film before the at least one decorative layer is applied.It is possible that the at least one decorative layer, in particular after the application of the at least one heating wire, is carried out by means of hot stamping.

[0233] If, for example, the application of the at least one heating wire takes place first, subsequent decoration can be carried out, for example by hot stamping. It is also possible for the at least one decorative layer to be applied using an IMD process, in particular after the application of the at least one heating wire. In this IMD process, an IMD film comprising the at least one decorative layer, in particular the first decorative layer 22, is preferably arranged on one side of a cavity and the at least one carrier film, in particular the carrier film 20, with the at least one heating wire 21 is arranged on another side of the cavity, and an injection molding compound, in particular with the first or the second flowable composition, is introduced between the at least one decorative layer, in particular the decorative layer 22, and the at least one carrier film, in particular the carrier film 20.

[0234] After the IMD process, it is preferably possible for the overmolding and / or flooding to be carried out. It is also possible for the application of the at least one decorative layer to be carried out using other methods, such as, in particular, the other methods described.

[0235] A particular advantage of an embodiment as described in Fig. 3 is that at least one decorative layer can be formed which is not penetrated by the at least one heating wire and thus provides more flexible design options and that, depending on requirements, an optimized heat distribution can be provided by the distance to the heated surface which can be adjusted by means of the at least one carrier film.

[0236] As illustrated by way of example in Fig. 4, it is also possible for one or more decorative layers of the at least one decorative layer, in particular the second decorative layer 23, and the at least one heating wire 21 to be arranged on opposite sides of the at least one carrier film, in particular the first carrier film 20, preferably with the at least one decorative layer, in particular the second decorative layer 23, being arranged on the back of the at least one carrier film, preferably the first carrier film 20, and the at least one heating wire 21 being arranged on a front side of the at least one carrier film, preferably the first carrier film 20. In this case, it is possible for the at least one heating wire to be applied to and / or introduced into the at least one carrier film before the at least one decorative layer is applied.It is possible that the at least one decorative layer, in particular after the application of the at least one heating wire, is carried out by means of hot stamping.

[0237] If, for example, the application of the at least one heating wire takes place first, subsequent decoration can be carried out, for example by hot stamping. It is also possible for the at least one decorative layer to be applied using an IMD process, in particular after the application of the at least one heating wire 21. In the IMD process, an IMD film comprising the at least one decorative layer is preferably arranged on one side of a cavity and the at least one carrier film with the at least one heating wire is arranged on another side of the cavity, and an injection molding compound, in particular with the first or the second flowable composition, is introduced between the at least one decorative layer and the carrier film. After the IMD process, it is preferably possible for the overmolding and / or flooding to be carried out.

[0238] It is also possible that the application of the at least one decorative layer is carried out by means of other methods, such as in particular the other methods described.

[0239] In contrast to the example illustrated by Fig. 3, in which the decoration is located in particular on the visible side of the at least one carrier film, the decoration in Fig. 4 is, for example, on the back of the carrier film, ie visible through the at least one carrier film from the visible side of the film body 100 and / or from the front side of the layer composite 2. The at least one heating wire 21 is arranged in front of or above the decoration, in particular when viewed from the visible side, and is visible, as is also illustrated in particular in Fig. 1.

[0240] An advantage of an embodiment as described in Fig. 4, for example, is that the at least one heating wire 21 can be arranged close to the heatable surface. Furthermore, more diverse design options can advantageously be achieved for the at least one decorative layer, since the at least one heating wire is not in direct contact with the decorative layer arranged on the opposite side.

[0241] It is also possible to combine the embodiments described in Figs. 1 and 4. In particular, a layered composite 2 and / or film body 100 as shown in Fig. 5 can be obtained or produced.

[0242] It is also possible to combine the embodiments described in Figs. 2 and 3. In particular, a layered composite 2 and / or film body 100 as shown in Fig. 6 can be obtained or produced in this way.

[0243] It is therefore particularly possible for a first side of the at least one carrier film to be or to be provided with at least one first decorative layer and the at least one heating wire, and for a second side, which is opposite the first side, to be or to be provided with at least one further decorative layer. In particular, the first side can represent either the front side or the back side of the at least one carrier film. This makes it possible to achieve optimized heat distribution with increased design options. The at least one decorative layer on the first side and the at least one further decorative layer on the second side preferably overlap and / or visually complement one another, for example as complementary patterns and / or motifs and / or as a color mixture or as combinations thereof. As shown by way of example in Fig. 1 to Fig.6, it is possible for the at least one heating wire 21 to be applied to a front side or a back side of the at least one carrier film. Furthermore, it is possible for the at least one heating wire 21 to be incorporated into one or more layers or to be selected from: the at least one decorative layer, in particular the first decorative layer 22 or the second decorative layer 23, the first carrier film 20, the second decorative layer 23. Furthermore, it is possible for the at least one heating wire 21 to be applied to and / or incorporated into the first side of the first carrier film 20 or the second side of the first carrier film 20.Preferably, the at least one heating wire 21 can be incorporated into multiple layers by completely penetrating a layer, such as the at least one decorative layer, in particular the first decorative layer 22 or the second decorative layer 23, and / or the at least one decorative layer, in particular the first decorative layer 22 and / or the second decorative layer 23, is or will be applied only over part of the area, in particular in the form of a motif, wherein the at least one heating wire 21 extends in particular beyond the at least one decorative layer, in particular the first decorative layer 21 and / or the second decorative layer 23. The at least one decorative layer, in particular the first decorative layer 22 and / or the second decorative layer 23, is or will be arranged preferably on a front side and / or a back side of the first carrier film 21.

[0244] The following is an optional example of layer thicknesses and materials for the embodiments illustrated in Figs. 1 to 6. The first carrier component 1 is formed, in particular, from transparent PU and has a layer thickness of 0.2 mm to 20 mm, preferably when the carrier component 1 is the A-side (visible side) of the finished component. The second carrier component 3, in this case, is formed, in particular, from PC and has a layer thickness of 0.2 mm to 20 mm.

[0245] However, the first carrier component 1 can also be made of PC with a layer thickness of 0.2 mm to 20 mm. In this case, the second carrier component 3, which now represents the A-side (visible side) of the component, is or will preferably be made of transparent PU. The layer thickness of the second carrier component 3 is preferably in a range of 0.2 mm to 20 mm.

[0246] The heating wire 21 is formed in particular from copper and has a circular cross-section with a diameter of 100 μm. The first carrier film 20 is formed in particular from PC and has a layer thickness of 375 μm. The first decorative layer 22 is in particular a printing layer with a layer thickness of 10 μm or a transfer layer of a hot stamping foil and has a layer thickness of 15 μm. The first decorative layer 22 can be transparent or colored transparently, or translucent or opaque, over the entire surface or only in partial areas. The second decorative layer 23 is in particular a printing layer with a layer thickness of 25 μm or a transfer layer of a hot stamping foil and has a layer thickness of 5 μm. The second decorative layer 23 can be transparent or colored transparently, or translucent or opaque, over the entire surface or only in partial areas.The optional protective lacquer layer has in particular a layer thickness of 12 pm and is formed by a dual cure lacquer and is in particular transparent, preferably crystal clear.

[0247] In a preferred embodiment, which can be shown in particular by way of example with reference to Fig. 7 to Fig. 9, it is possible for the at least one heating wire 21 to be additionally arranged between the first carrier film 20 and a substrate 4, which has a reflective layer 41. Furthermore, it is possible that, in particular after steps b) and c), the at least one heating wire 21 is or will be arranged in the film body 100 between the first carrier component 1 and the second carrier component 3. Furthermore, it is possible for the at least one heating wire 21 and / or a contacting element 5 to protrude from the film body 100 and to be or will be formed free of the first carrier component 1 and / or second carrier component 3, as is explained in more detail, in particular by way of example with reference to one of Figs. 13 to 15. In addition to the heating wire 21, one or more further heating wires can optionally also be introduced into the layer composite 2.It is preferred that only one heating wire and / or only one level of the layer composite 2 and / or the film body 100 is or will be provided with one or more heating wires.

[0248] Fig. 7 schematically shows a layer composite 2 and a film body 100 with the layer composite 2 and the first carrier component 1 and the second carrier component 3. As illustrated by way of example in Fig. 7, it is possible for the layer composite 2 to additionally have a substrate 4. The substrate 4 has in particular at least one reflective layer 41, wherein the reflective layer 41 preferably comprises or consists of PMMA. The reflective layer 41 has in particular one or more of the following materials: PMMA, PMMA derivatives, modified PMMA. The reflective layer 41 is or will preferably be applied with a layer thickness in a range from 1 pm to 75 pm, in particular 50 pm. As further illustrated by Fig. 7, it is possible for the film body 100 to have or be provided with a light source 44. By means of this light source 44, it is possible to radiate light into the film body 100.The incident light is preferably radiated onto or at the rear side 102 and / or laterally. In particular, the incident light is radiated at least into the first carrier component 1 or into a material of the finished film body 100 comprising the first carrier component 1 and optionally, for example, the carrier film 201.

[0249] The reflective layer 41 preferably comprises a material which, at least in the finished film body 100, forms an optical interface together with at least one adjacent layer, in Fig. 7 for example at least with the carrier film 201 and / or the adhesive layer 42 or the material comprising this layer(s), for example comprising the first carrier component 1 and the carrier film 201. In this case, the reflective layer 41 is designed in particular such that there is a difference in refractive index at the interface. At this optical interface, the light radiated in by means of the light source 44 is therefore reflected. This optical interface is at least partially reflective, ie in particular that a portion of the light radiated in laterally by the light source 44 is reflected at the interface and another portion is allowed to pass through the interface in the direction of the decorative layer 22 and the heating wire 21.Thus, the incident light is advantageously partially trapped in the layer structure to achieve at least weak backlighting of the decorative layer 22. This can, in particular, enable, in addition to a headlight function, for example, a preferably slight glow for backlighting the at least one decorative layer.

[0250] It is also possible for the substrate 4 to have one or more adhesive layers, such as the first adhesive layer 42 and / or the second adhesive layer 43, which is preferably arranged on a side of the substrate 4 facing the first carrier film 20 and / or a side of the substrate 4 facing away from the first carrier film 20.

[0251] The first decorative layer 22 is also shown here over the entire surface, but can also be provided over part of the surface, in particular in the form of a motif.

[0252] The first carrier component 1 preferably comprises or consists of PC. In particular, the first carrier component is or will be applied by back-injection molding. The second carrier component 3 preferably also comprises or consists of PC. In particular, the second carrier component 3 is or will be applied by over-injection molding.

[0253] PC and PMMA, in particular, are frequently chosen transparent materials. Therefore, in a preferred embodiment, the layers formed from PC and / or PMMA are preferably transparent. However, back-injected materials may also be opaque on the rear side (opposite the visible side 101), in particular up to the at least one decorative layer, thus completely covering the rear side opaquely, for example, when no backlighting is required, or only partially covering the rear side opaquely, for example, as a backlight mask and / or backlight shield, with the remainder of the rear side being transparent or translucent.

[0254] The front side of the film body 100 and / or, for example, at least the materials from the visible side 101 to the heating wire 21, to the at least one decorative layer, in particular the decorative layer 22, to the at least one carrier film, in particular the carrier film 20 and / or the carrier film 201, are preferably transparent, at least translucent, and in particular have the correspondingly applied materials (e.g. by injection molding, flooding, printing).

[0255] The first adhesive layer 42 and / or the second adhesive layer 43 is or will preferably be applied with a layer thickness in a range of 5 μm to 120 μm, in particular 50 μm. The first adhesive layer 42 and / or the second adhesive layer 43 is preferably transparent.

[0256] The first carrier film 20 and / or the second carrier film 201 is or will preferably be applied with a layer thickness in a range of 100 pm to 375 pm, in particular of 120 pm.

[0257] Transparent or translucent here preferably refers to visible light.

[0258] Fig. 8 schematically shows a layer composite 2 as described in particular with reference to Fig. 7, as well as a film body 100 with the layer composite 2, the first carrier component 1 and the second carrier component 3. The adhesive layers 42 and 43 can optionally be formed by an adhesive mass enclosing the reflective layer 41. Preferably, instead of the enclosing adhesive mass, as can be seen, for example, in Fig. 7, two separate adhesive layers 42 and 43 are formed. It is therefore also possible for the substrate 4 to have one or more adhesive layers, such as the first adhesive layer 42 and / or the second adhesive layer 43, which is preferably arranged on a side of the substrate 4 facing the first carrier film 20 and / or a side facing away from the first carrier film 20.

[0259] As illustrated by way of example in Fig. 8, it is possible for the at least one decorative layer, in particular the first decorative layer 22, to be applied to the first carrier film 20 in a decoration step, in particular to be applied to the first side of the carrier film 20.

[0260] In a coating step, it is particularly possible for the reflective layer 41 to be provided with one or more adhesive layers, in particular the first adhesive layer 42 and / or the second adhesive layer 43. Furthermore, it is possible for the second carrier film 201 to be provided and bonded to the substrate 4 in a further step.

[0261] The at least one heating wire 21 is preferably applied to the at least one decorative layer, in particular the first decorative layer 22. In this case, the at least one heating wire 21 can also be introduced into the first decorative layer 22 and optionally the first carrier film 20. It is then possible to connect the first carrier film 21 to the first decorative layer 22 and the at least one heating wire 21 to the substrate 4, which preferably has one or more adhesive layers. In particular, the at least one heating wire 21 is arranged between the substrate 4 and the first carrier film 20. The second carrier film 201 can be applied beforehand or subsequently to the side facing away from the heating wire 21.

[0262] The first carrier film 20 can advantageously produce good adhesion with the second carrier component 3 and / or the protective lacquer layer. The second carrier film 201 can advantageously produce good adhesion with the first carrier component 1. As illustrated by way of example in Fig. 9, it is also possible for one or more decorative layers, in particular the second decorative layer 23, to be applied to the second carrier film 201. In this case, it is possible, for example, for the first carrier film 20 to have no decorative layer, as can be seen in Fig. 9, for example, or for the first carrier film 20 to have the first decorative layer 22 and, in addition, at least one further decorative layer, such as the second decorative layer 23, to be arranged on the second carrier film 201.Terms such as “first” and “second” are used accordingly, in particular to differentiate, whereby a “second” decorative layer does not necessarily presuppose the existence of a “first” decorative layer. It is therefore also possible for the at least one heating wire 21 to be first applied to the first carrier film 20 and in particular to be introduced into the first carrier film 20. It is particularly possible for the at least one heating wire 21 to be merely applied to the first carrier film 20 and in the process preferably to be introduced into the first carrier film 20. Preferably, the at least one heating wire 21 is then arranged between the substrate 4 and the first carrier film 20 and the substrate 4, first carrier film 20 and the at least one heating wire 21 are connected.

[0263] It is also possible that the second carrier film 201 is or will be connected to the substrate 4, wherein the second decorative layer 23 is or will be arranged between the second carrier film and the substrate.

[0264] As described by way of example with reference to Fig. 8 and Fig. 9, a preferred layer composite 2 has a substrate 4, which is preferably arranged at least in regions between a first carrier film 20 and a second carrier film 21. More preferably, the first carrier film 20 is or will be arranged between the substrate 4 and the second carrier component 3 and / or the second carrier film 201 between the substrate 4 and the first carrier component 1. Alternatively or additionally, it is also possible for the first carrier film 20 to be arranged between the substrate 4 and the optional protective lacquer layer 31. It is also conceivable that, in an exemplary embodiment as described in particular with reference to Figs. 1 to 9, a multi-core heating line is or will be provided instead of the heating wire 21 and / or a multi-core heating line comprising the heating wire 21.In this case, the first decorative layer 22 and / or the second decorative layer 23 may or may not be present. As described in more detail in Fig. 22, the multi-core heating cable itself may already have a special optical effect.

[0265] Fig. 10 schematically shows an exemplary method for producing a layer composite 2. Here, the at least one heating wire 21 is applied in particular to the substrate 4 and / or introduced into the substrate 4.

[0266] In a first step 1001, the reflection layer 41 of the substrate 4 is provided, for example, on both sides with the adhesive layers 42 and 43.

[0267] In a second step 1002, the first carrier film 20 is provided and applied, in particular laminated, to the substrate 4. Laminating is understood here, in particular, to mean a process using pressure and / or temperature.

[0268] In a third step 1003, the at least one heating wire 21 is introduced into the substrate 4, in particular into an adhesive layer which is arranged on a side of the reflection layer 41 facing away from the first carrier film 20, such as preferably the adhesive layer 42.

[0269] In a fourth step 1004, which can be performed in a sequence independent of steps 1001, 1002, and 1003, a second carrier film 201 is provided with one or more decorative layers of the at least one decorative layer. For example, the decorative layer 22 is shown in Fig. 10. In a fifth step 1005, the first carrier film 20, the decorative layer 22, and the at least one heating wire 21 are bonded, resulting in the layered composite 2.

[0270] In particular, the second carrier film 201 is applied, preferably laminated, to the substrate 4. Preferably, the decorative layer 22 and the at least one heating wire 21 are arranged between the second carrier film 201 and the substrate 4.

[0271] Subsequently, the layered composite 2 can be formed, in particular using an HPF process (HPF = High Pressure Forming). In this process, the layered composite 2 is formed using high pressure and low temperature, in particular a pressure in the range of 80 bar to 120 bar at a temperature in the range of 80°C to 150°C.

[0272] Furthermore, it is possible to supply the layer composite 2 as an insert element to the method for producing the film body 100, in particular to an injection molding process, whereby the film body 100 is obtainable, as is described in particular for the method for producing a film body.

[0273] It is also conceivable that in the method, instead of the heating wire 21, the multi-core heating cable is introduced into the substrate 4 and / or that the heating wire 21 is encompassed by the multi-core heating cable when introduced into the substrate 4.

[0274] Fig. 11 schematically shows a cross section in the left image and a plan view of a layer composite 2 in the right image. Such a plan view is in particular a view perpendicular to a plane spanned by the layer composite. It is possible that when viewing the visible side of the film body 100, the layer composite 2 is visible, as is shown in particular schematically by the plan view in Fig. 11, in particular is visible through the second carrier component 3 and / or the protective lacquer layer, more preferably is visible at least in regions or completely. As is also illustrated by way of example in Fig. 11, it is possible for the at least one heating wire 21 to be visible and in particular the at least one decorative layer, preferably the first decorative layer 21, to be arranged behind the at least one heating wire 21 when viewing the visible side.

[0275] Optionally, the layered composite 2 can have one or more protective layers, such as the illustrated protective layer 27. Instead of the protective layers 27, an adhesive layer can also be arranged, or the protective layer 27 can fulfill an adhesive function.

[0276] Optionally, the layered composite 2 can have one or more primer layers, such as the illustrated primer layer 26. Instead of the primer layer 26, an adhesive layer can also be arranged, or the primer layer 26 can fulfill an adhesive function.

[0277] It is possible for the at least one heating wire, particularly when viewed perpendicular to a plane spanned by the layered composite 2, to occupy an area in a range from 0.1% to 50%, preferably in a range from 1% to 10%, particularly preferably in a range from 1% to 5%. The occupied area is, in particular, the surface area of ​​the region of the layered composite 2 overlapping with the at least one heating wire 21 divided by the total area of ​​the layered composite 2, in particular of the at least one carrier film.

[0278] It is particularly possible that the layer composite 2, for example when considering Fig. 11, has the following exemplary properties:

[0279] Width of 100 cm,

[0280] Length of 100 cm, area 10000 cm 2 , Distance d, preferably minimum distance d, of opposite, in particular parallel, conductor tracks of the at least one heating wire: 0.5 cm

[0281] Number of opposite, in particular parallel, conductor tracks of the at least one heating wire: 200,

[0282] Distance of the at least one heating wire from opposite ends of the layer composite, in particular ends at the top and bottom in Fig. 11: 1 cm.

[0283] Length of at least one heating wire 19600 cm,

[0284] Diameter of at least one heating wire: 100 pm,

[0285] Occupied area: 196 cm 2 (= length of at least one heating wire x diameter of at least one heating wire).

[0286] Area coverage of the at least one heating wire: 1.96% (= percentage share occupied by the area of ​​the at least one heating wire in relation to the total area, which can be seen in particular in plan view as in Fig. 11).

[0287] The total area can therefore be determined in particular using the product of the width and the length of the layer composite 2.

[0288] A preferred determination of the above values ​​can be made as follows: Sheet ~ Sheet Lsheet with Fsheet=area of ​​the heating support; Bsheet=width; Lsheet=length) where L = length of the heating wire (preferably without bends); So = upper edge distance; Su = lower edge distance; A = number of wire paths) (F heating wire = area of ​​the heating wire (preferably without bends); L heating wire = length of the heating wire (preferably without bends); D heating wire = diameter of the heating wire) 100

[0289] (Fsheet=area of ​​the heating support; Fheating wire = area of ​​the heating wire (preferably without bends); Belheating wire=percentage coverage of the total heating support surface with heating wire).

[0290] Fig. 12 schematically shows a cross section in the left image and a plan view of a layer composite 2 in the right image. It is possible that when the visible side of the film body 100 is viewed, the layer composite 2 is visible, as is shown particularly schematically in the plan view of Fig. 11, in particular is visible through the second carrier component 3 and / or the protective lacquer layer, more preferably is visible at least in regions or completely. As is also illustrated by way of example in Fig. 12, it is possible that the at least one heating wire 21 is concealed and in particular the at least one decorative layer, preferably the first decorative layer 21, is arranged in front of the at least one heating wire 21 when the visible side is viewed. The layer composite 2 of the example shown in Fig. 12 can in particular be like that of Fig.11 described layer composite 2, except that the at least one heating wire is or will be arranged on a back side of the layer composite 2.

[0291] The decorative layer 22, which is shown, for example, in Fig. 11 and / or Fig. 12, can in particular also be a transparent or semi-transparent decorative layer. In the exemplary Figs. 11 and 12, the decorative layer 22 is provided over the entire surface. It is also possible for the decorative layer 22 to be arranged in the form of a motif. In particular, the decorative layer 22 can also be partially concealed by the at least one heating wire 21 when viewed from the visible side and / or the heating wire can be at least partially concealed by the decorative layer 22.

[0292] It is also possible for the decorative layer 22 itself to be single-layered or multi-layered. For example, the decorative layer 22 can be a printed layer, in particular a printing ink layer, or a vapor-deposited layer, in particular a metal layer, or a printed layer, in particular a printing ink layer, with a vapor-deposited layer, in particular a metal layer, arranged thereon.

[0293] Fig. 13 shows, by way of example, a schematic cross section of a layer composite 2 with a contacting element 5. The layer composite 2 can in particular be constructed as described for one of Figs. 1 to 12, wherein the layer composite additionally has the contacting element 5.

[0294] The contacting element 5 is or will be designed in particular such that it is suitable for electrically contacting the at least one heating wire 21 and / or the multi-core heating cable, which may in particular comprise the heating wire 21.

[0295] Although the layer composite 2 is shown in Fig. 13 as part of the film body 100, it can in particular also be or will be produced separately and preferably used as an insert element in the method for producing the film body 100, so that a film body 100 comprising the layer composite 2 is obtained. It is also possible for the layer composite 2 to be formed as part of the film body 100 during the method for producing the film body 100. Optionally, the film body 100 can have the protective lacquer layer 31 or be provided with it. The film body 100, as illustrated by way of example in Fig. 13, has the layer composite 2, which is or will be arranged in regions between the first carrier component 1 and the second carrier component 3, in particular before steps b) and c) are carried out.In addition, the film body 100 and / or the layer composite 2, in particular also after step b) and after step c), has a contacting region 50 that is free of the first carrier component 1 and the second carrier component 3. This contacting region 50 is provided in particular by the contacting element 5.

[0296] The contacting element 5 is or will be brought into contact with the at least one heating wire 21, in particular before step iv) and / or step a), preferably partially between two layers of the layer composite, or comprises the at least one heating wire 21. The at least one heating wire 21 can in particular be provided by the contacting element 5 or can be or will be arranged between the contacting element 5 and the first carrier component 1 or between the contacting element 5 and the second carrier component 3. It is possible for the contacting element 5 itself to comprise or be formed by one or more layers of the layer composite 2.It is possible for the contacting element 5 to be formed with one or more of the following layers: at least one electrically conductive layer comprising or consisting of a conductive layer made of Cu, Ag, Au, and / or Zn, at least one electrically insulating layer, at least one adhesion promoter layer, and at least one anti-adhesion layer. The contacting element 5 can be bonded, in particular, by means of electrically conductive adhesive, in particular bonded to the at least one heating wire 21. Preferably, the at least one heating wire 21 is or will be bonded directly to the electrically conductive layer.

[0297] It is also possible for the contacting element 5 to be formed from at least one end, in particular two ends, of the at least one heating wire 21. Preferably, the heating wire 21 is fixed to the end of the contacting element 5 in the contacting region 50. Optionally, a contact reinforcement 52 can be provided in the contacting region 50. It is possible for the contacting element 5 to have two ends of the heating wire 21, each end being provided with a contact reinforcement 52. Such contact reinforcements advantageously provide both an enlarged contact surface and mechanical reinforcement in the contacting region 50.

[0298] The contacting element 5 comprises, in particular, at least the first carrier film 20 and the heating wire 21 within the contacting region 50. Optionally, it is possible for the contacting element 5 to have the decorative layer 22 or 23 in regions or over its entire surface, for example if at least one of them is or will be applied over its entire surface or almost its entire surface to the carrier film 20 or another layer of the layer composite 2. The contacting region 50 can be formed, for example, free from the first carrier component 1 and free from the second carrier component 3 by an area that is not accessible to the first and / or second flowable composition during step b) and / or c), for example by means of a corresponding cavity of an injection molding tool, in particular the first and / or second tool mold and / or the first gap shape and / or the second gap shape and / or one or more metallic inserts for adapting the cavity.Alternatively or additionally, it is possible for the contacting region 50 to be formed by a region that is not accessible to the first and / or second flowable composition during step b) and / or c) by means of the gap of the device, preferably a first gap shape and / or a second gap shape. An exemplary device with a corresponding first gap shape 81 and a second gap shape 82 is described in particular with reference to Fig. 15. Alternatively or additionally, it is also possible, in particular after steps b) and / or c), to leave a region of the film body 100 free while retaining the contacting region 50, for example by means of grinding, milling, drilling, cutting, punching, etching, chemical removal and / or laser ablation. Fig. 14 shows a view from below, in particular from the visible side 101, of a layer composite 2 as described for Fig. 13. It is also possible for Fig. 14 to be a view from below of a layer composite 2 as described for Fig.13, wherein additionally the first carrier component 1, the second carrier component 3 and optionally the protective lacquer layer 31 are or will be provided in the region with the layers 20, 21 and 22.

[0299] As shown by way of example in Fig. 14, it is also possible for the layer composite to have an anti-adhesion layer 51 in the contacting region 50. It is expedient that at least in some regions an outer surface of the contacting element 5 is or will be formed by the anti-adhesion layer 51. The anti-adhesion layer 51 advantageously forms at least one outer surface of the contacting element 5. During the production of the film body 100, this outer surface can be brought into contact with a tool mold, in particular with the first and / or second gap mold, as described in particular with reference to Fig. 15, so that the contacting element 5 can be or will be designed at least in some regions not in the cavity and / or at least in some regions free of the first carrier component 1 and the second carrier component 3.

[0300] It is possible for the contacting element 5 to have a layer, in particular the first carrier film 20 shown in Fig. 13, which is present over the entire surface or partially in the contacting region 50 and between the first carrier component 1 and the second carrier component 3, preferably in the layer composite 2. The contacting element 5 can optionally also have further layers in the contacting region 50, in particular layers on the carrier film 20, which are also present over the entire surface or partially between the first carrier component 1 and the second carrier component 3, preferably in the layer composite 2. Fig. 15 schematically shows a section of an example of a device, in particular an injection molding device. This device is used in particular for carrying out a method for producing the film body 100, preferably as described for one of Figs. 13 and 14, or is suitable for such a method.Preferably, the device is used to carry out step b) and / or step c).

[0301] The upper two sections refer in particular to a first embodiment and the lower two sections to a second embodiment.

[0302] The device comprises means for forming a cavity 70, which comprises at least a first mold 71 and a second mold 72. The first mold 71 and the second mold 72 can be placed in a closed state, in which the cavity 70 is formed by at least the first mold 71 and the second mold 72, as can be seen, for example, in the upper image.

[0303] The device further comprises means for forming a defined gap 80 adjoining the cavity, which gap has at least a first gap shape 81 and a second gap shape 82, wherein the gap 80 is formed in the closed state by at least the first gap shape 81 and the second gap shape 82. At least one of the first gap shape 81 and the second gap shape 82 is connected to the first tool shape 71 and / or to the second tool shape 72 via a detachable connecting element 83. By way of example, in Fig. 15, the first gap shape 81 is connected to the first tool shape 81 via a screw connection by means of the screw 83.

[0304] Furthermore, it is preferably possible for the second gap shape 82 and the second tool shape 72 to be formed at least partially by a monolithic component, as can be seen by way of example in Fig. 15. It is also possible, as illustrated by way of example in Fig. 15, for the first gap shape 81 and the second gap shape 82 to be designed such that, in the closed state, the gap 80 has a first cross-sectional area and a second cross-sectional area, wherein the first cross-sectional area is arranged closer to the cavity 70 and has a smaller surface area than the second cross-sectional area. In particular, the contacting element can thus be clamped by means of the first and second gap shapes in a region of the contacting element provided for this purpose, which region is provided, for example, with an anti-adhesive layer.Furthermore, the detachable connection can be or will be provided in the region of the second cross-sectional area, in particular without impairing the contacting element 5 in the closed state.

[0305] The upper two sections of Fig. 15 show a gap shape 81 which is configured, for example, to use a layered composite 2 as an insert element, which has the at least one heating wire 21 on the back and / or the front of the layered composite 2, in particular of the at least one carrier film. As can be seen in particular from the dashed area of ​​the lower two sections of Fig. 15, it is possible to use a gap shape 81 which is configured to use a layered composite 2 as an insert element, which has the at least one heating wire 81 on the visible side and / or the first side of the at least one carrier film. Advantageously, changing the gap shape is easy due to the detachable connection and the gap shape can be integrated in a compact and process-reliable design, in particular due to the widened cross-section in the area of ​​the detachable connection.

[0306] In this case, a tightness of the gap 80 is preferably ensured as part of the sealing of the cavity 70. The gap 80 is preferably adapted exactly to the thickness of the contacting element 5 so that the gap 80 is left wide enough that the contacting element 5 is not mechanically destroyed, e.g. crushed or sheared off, when the mold is closed, and the gap 80 is simultaneously narrow enough that the first gap shape 81 and the second gap shape 82 lie tightly against the contacting element 5 in order to seal the cavity 70 together with the contacting element 5, in particular even at the high pressures and temperatures during back-injection molding. For this purpose, it is advantageous if at least one of the gap shapes 81 and 82 is not formed integrally with the respective tool shape 71 or 72, but rather each forms an exchangeable module which can be adapted accordingly so that the gap 80 can be adapted to different thicknesses of the contacting element 5.

[0307] It is possible that, to produce the film body 100, steps b) and / or c) for back-injection or back-flooding and / or for applying the first, second and / or third flowable composition and / or all back-injection, back-flooding, over-injection and / or flooding process steps are carried out in the device. It is possible that, to introduce the first, second and / or third flowable composition, a cavity is formed in each case, preferably by mold halves, such as the first tool mold 71 and the second tool mold 72. In particular, by exchanging at least one of the first tool mold 71 and the second tool mold 72, for example after a first back-injection of step b), the cavity 70 is changed or a different cavity is created, so that, for example, a further back-injection and / or flooding can then take place in this other cavity to carry out step c).This can also be done several times in succession by replacing at least one mold half.

[0308] Fig. 16 shows a schematic view of the heating wire 21. As is illustrated by way of example, it is possible for the heating wire 21 to have a sheath layer 90. The sheath layer 90 comprises, in particular, an insulation layer 901 and a baked enamel layer 902. The insulation layer 901 is, in particular, arranged directly on the heating wire 21 and is preferably coated by means of at least one nozzle coating and / or at least one dip coating and / or at least one spray coating and / or at least one vapor deposition coating, preferably from one or more materials from the group consisting of:the groups of polyesters, polyacrylates, PMMA, melamines, melamine-formaldehyde resins, epoxy acrylate, polyether acrylate, polyester acrylates, acrylates, epoxy polymethacrylate, polyurethane, polystyrene, polybutyrate, nitrocellulose, polyvinyl chlorides, ethylene-vinyl acetates, their copolymers or similar polymers, additives, fillers, pigments, dyes, and in particular with a layer thickness of 10 μm. The baked enamel layer 902 is connected to the heating wire 21 in particular via the insulation layer 902 and is produced in particular by means of at least one nozzle coating and / or at least one dip coating and / or at least one spray coating and / or at least one vapor deposition coating from one or more materials from the group of thermosetting water-based hot melt adhesives, thermosetting solvent-based hot melt adhesives, epoxy resins, epoxy resin mixtures, and in particular with a layer thickness of 20 μm.The cladding layer 90 preferably has a layer thickness of 30 pm.

[0309] The heating wire 21 , which is illustrated by Fig. 16, has a minimum width and a smallest diameter of 50 pm and a minimum cross-sectional area of ​​2500 pm 2Fig. 17 to Fig. 20 show the heating wire 21 by way of example in a multi-core heating cable 9. Here, the heating wire 21 can be designed as described for Fig. 16, with the difference that it is also possible for the heating wire 21 to have a smaller width and / or a smaller diameter and / or a smaller cross-sectional area. In addition to the heating wire 21, the multi-core heating cable 9 also comprises one or more further heating wires, such as the heating wires 211, 212, 213 and 214 illustrated in Figs. 17 to 20. The further heating wires, such as the heating wires 211, 212, 213 and 214, can also be designed like the heating wire 21 described in Fig. 16, with the difference that it is also possible for the further heating wires to have a smaller width and / or a smaller diameter and / or a smaller cross-sectional area.The heating wire 21 and the other heating wires are galvanically separated from one another by one or more sheath layers, such as the sheath layers 90, 91, 92 and / or 93. The one or more sheath layers, such as the sheath layers 90, 91, 92 and / or 93, are or will be arranged in the film body so as to be at least partially visible, particularly when viewed from the visible side. Preferably, all heating wires are made of copper or predominantly comprise copper. Despite the possibly small cross-sections of the individual heating wires and the low specific resistance of the copper, it is possible to control the overall resistance of the multi-core heating cable 9 by specifically determining the number of heating wires, by selecting the structure and / or cross-section of the multi-core heating cable and also by selecting and determining the diameters of the heating wires and to adapt them to the requirements of the final component. As will be shown below with reference to Fig.16 to 20, different multi-core heating cables 9 can thus be realized, which can advantageously be used for a wide variety of optical effects with sufficient heating power.

[0310] Fig. 17 illustrates, in particular, an example of a multi-core heating cable 9 with parallel heating wires 21 and 211. The diameters of all heating wires are preferably the same. For example, in the example of Fig. 17, six heating wires 211 are arranged around the heating wire 21, preferably evenly around the heating wire 21. All heating wires have a diameter of 17 μm, for example. The length of the multi-core heating cable 9 is, for example, 4 m. The material of the heating wires 21 and 211 is, for example, copper with a specific resistance of 0.0171 Ω mm. 2 / m. Thus, the multi-core heating cable, for example, has a resistance of 42.3352 Ω.

[0311] Further examples of a multi-core heating cable 9 are the following, in particular with a length of the multi-core heating cable of 4 m and, for example, copper as the material of the heating wires with a specific resistance of 0.0171 Ω mm 2 / m: Number of heating wires: 2, diameter per heating wire 60 pm; Number of heating wires: 3, diameter per heating wire 40 pm;

[0312] Number of heating wires: 4, diameter per heating wire 30 pm;

[0313] Number of heating wires: 5, diameter per heating wire 24 pm;

[0314] Number of heating wires: 6, diameter per heating wire 20 pm;

[0315] Number of heating wires: 7, diameter per heating wire 17 pm;

[0316] Number of heating wires: 8, diameter per heating wire 15 pm;

[0317] Number of heating wires: 9, diameter per heating wire 13 pm;

[0318] Number of heating wires: 10, diameter per heating wire 12 pm;

[0319] Number of heating wires: 2, diameter per heating wire 50 pm;

[0320] Number of heating wires: 3, diameter per heating wire 33 pm;

[0321] Number of heating wires: 4, diameter per heating wire 25 pm;

[0322] Number of heating wires: 5, diameter per heating wire 20 pm;

[0323] Number of heating wires: 6, diameter per heating wire 17 pm;

[0324] Number of heating wires: 7, diameter per heating wire 14 pm;

[0325] Number of heating wires: 8, diameter per heating wire 13 pm;

[0326] Number of heating wires: 9, diameter per heating wire 11 pm;

[0327] Number of heating wires: 10, diameter per heating wire 10 pm;

[0328] Number of heating wires: 2, diameter per heating wire 40 pm;

[0329] Number of heating wires: 3, diameter per heating wire 27 pm;

[0330] Number of heating wires: 4, diameter per heating wire 20 pm;

[0331] Number of heating wires: 5, diameter per heating wire 16 pm;

[0332] Number of heating wires: 6, diameter per heating wire 13 pm;

[0333] Number of heating wires: 7, diameter per heating wire 11 pm;

[0334] Number of heating wires: 8, diameter per heating wire 10 pm;

[0335] Number of heating wires: 9, diameter per heating wire 9 pm;

[0336] Number of heating wires: 10, diameter per heating wire 8 pm.

[0337] By determining the resistance of the multi-core heating cable, the heating power of the multi-core heating cable can be determined, and the multi-core heating cable, a control unit, and / or power supply can be configured or provided according to the requirements in the film body. As illustrated in Fig. 17, it is possible for one or more heating wires, in particular all heating wires 21 and 211, of the multi-core heating cable 9 to run straight, at least in sections.

[0338] It is possible for the sheath layers 91 of the outer heating wires 211 to be the same color. Particularly in the case of a curved multi-core heating cable 9 in the heating foil composite, in the layer composite, and / or in the foil body, a locally varying color effect and / or locally varying brightness effect can be provided. For example, the surface structure of the multi-core heating cable can be used for this purpose. For example, the surface structures may be below the resolution of the human eye in a normal viewing situation, but influence the visible color and / or brightness. Thus, in addition to the heating function, special optical effects are advantageously possible.

[0339] It is also possible for multiple sheath layers 91 of the outer heating wires 211 to be of different colors. An example of this is illustrated in Fig. 22. As described in more detail, the surface structure of the multi-core heating cable 9 with corresponding color differences can be used to create optically variable effects. This allows for the creation of further special optical effects.

[0340] The sheath layers 91 of the outer heating wires 211 of Fig. 17 are, for example, connected both directly to one another and directly to the heating wire 21. It is also possible for the sheath layers 91 of the outer heating wires 211 to be spaced apart from one another and / or to be spaced apart from one another via sheath layers of heating wires with a smaller diameter, such as the sheath layers 92 of the heating wires 212 of Fig. 18, or with a gap without further heating wires, in particular apart from the heating wire 21. Preferably, the sheath layers 91 each have an insulation layer on the inside and a baked enamel layer on the outside, wherein the color of the respective sheath layer is preferably determined at least by the baked enamel layer.The baked enamel layer of the jacket layers 91 is connected to the respective heating wire in particular via the insulation layer of the respective jacket layer and is produced by means of at least one nozzle coating and / or at least one dip coating and / or at least one spray coating and / or at least one vapor deposition coating of one or more materials from the group of thermosetting water-based hot melt adhesives, thermosetting solvent-based hot melt adhesives, epoxy resins, epoxy resin mixtures, in particular with a layer thickness of 20 μm. The insulation layer preferably has a layer thickness in a range from 0.5 μm to 100 μm. The baked enamel layer preferably has a layer thickness in a range from 0.5 μm to 100 μm. The jacket layers 90 and 91 preferably have a layer thickness in a range from 1 μm to 200 μm. The jacket layers 90 and 91 in particular provide a distance between the heating wires.There is preferably a minimum distance in a range of 0.5 pm to 10 pm between two or more heating wires of the heating wires 21 and 211. The multi-core heating cable 9 has, in particular, a width or diameter in a range of 10 pm to 500 pm.

[0341] Fig. 18 schematically shows a multi-core heating cable 9 with heating wires of different diameters. In the example of Fig. 18, four heating wires 211 and four heating wires 212 are arranged around the heating wire 21. The heating wires 211 and 212 are arranged uniformly around the heating wire 21, for example, so that in particular a rotationally symmetrical and axially symmetrical cross-section is present. The heating wire 21 and the heating wires 211 here in particular have the same diameter. The heating wires 211 have, for example, a first diameter, wherein the heating wires 212 have a second diameter which corresponds to approximately 66% of the first diameter. For example, the first diameter of the heating wires 211 is 16 pm and the second diameter of the heating wires 212 is 11 pm. The length of the multi-core heating cable 9 is, in particular, 4 m. The material of the heating wires 21, 211, and 212 is, for example, copper with a specific resistance of 0.0171 Ω mm.2 / m. The resistance of the multi-core heating cable 9 is thus 50.4559 Ω.

[0342] Further examples of multi-core heating cables with different diameters of the heating wires for a 4 m long multi-core heating cable with, for example, copper with a specific resistance of 0.0171 Ω mm 2 / m as material of the heating wires are the following:

[0343] Number of heating wires with the first diameter (heating wires 211 and heating wire 21 ): 5, first diameter: 20 pm, number of heating wires 212 with the second diameter: 4, second diameter: 13 pm, resistance of the multi-core heating cable: 32.2918 Q;

[0344] Number of heating wires with the first diameter (heating wires 211 and heating wire 21 ): 5, first diameter: 24 pm, number of heating wires 212 with the second diameter: 4, second diameter: 16 pm, resistance of the multi-core heating cable: 22.4246 Ω;

[0345] Preferably, the heating wires 211 each have a sheath layer 91, as described in particular with reference to Fig. 17.

[0346] Fig. 19 schematically shows a multi-core heating cable 9 with the heating wire 21 and a further heating wire 213. As illustrated by Fig. 19, the heating wire 21 can be guided straight, at least in sections. In this example, the further heating wire 213 is twisted around the heating wire 21. The heating wire 213 thus has the shape of a spiral, in particular a helix. The heating wire 213 has a sheath layer 93, via which it is connected to the sheath layer 90 of the heating wire 21. The sheath layer 93 can, as has already been described in particular with regard to the sheath layer 90 and / or the sheath layer 91, have a baked enamel layer and / or an insulation layer. The twisted heating wire 213 preferably has a smaller diameter than the heating wire 21.The cladding layer 93 preferably has a different color than the cladding layer 90, in particular by the cladding layer 93 having a baked enamel layer and the cladding layer 90 having an insulating layer, wherein the baked enamel layer of the cladding layer 93 has a different color than the insulating layer of the cladding layer 90. Alternatively, it is possible that, in the example illustrated by Fig. 19, the cladding layer 93 and the cladding layer 90 are the same color.

[0347] It is also conceivable to arrange several heating wires 21 with twisted heating wires 213 next to one another, as illustrated in Fig. 19, in particular so that a ribbon-shaped multi-core heating cable 9 is produced, preferably wherein a connection between two sheath layers 90 of two heating wires 21 is created via the sheath layer 93, in particular the baked enamel layer, of a heating wire 213 arranged between the two heating wires 21. Thus, in particular, several heating wires 21 running parallel to one another can each be connected to one another via a sheath layer 93, in particular its baked enamel layer, by each heating wire 213 including the sheath layer 93 extending through an intermediate space between two heating wires 21 running parallel to one another. This results in particular in contact points or contact surfaces between the respective sheath layer 90 and the respective sheath layer 93.

[0348] In this case, several sheath layers 93 can be provided which are of the same color or of different colors.

[0349] Fig. 20 shows a schematic representation of a strip-shaped multi-core heating cable 9 with several parallel heating wires. In this example, the multi-core heating cable 9 has, in addition to the heating wire 21, further heating wires 214. In total, there are therefore four heating wires. However, it is also conceivable for there to be only 2 or, for example, 6 heating wires. The heating wire 21 has the sheath layer 90, and the heating wires 214 each have a sheath layer 94. This results in particular in contact points or contact surfaces between the sheath layer 90 and the respective sheath layer 94 or between the respective sheath layers 94, which connect the heating wires 21 and 214 to one another. The sheath surfaces 90 and 94 can be the same color or different colors. A strip-shaped multi-core heating cable with several sheath surfaces of the same color and / or several different colors is therefore conceivable.

[0350] In this example, the multi-core heating cable 9 additionally has a leveling layer 930, which is optional, however. The leveling layer 930 is arranged on one side of the multi-core heating cable and extends along a surface parallel to a plane spanned by a longitudinal direction of the heating wires 21 and 214 and a direction connecting a plurality of center lines of the heating wires 21 and 214. The center lines extend in particular along the longitudinal direction. The leveling layer 930 smooths out the elevations and depressions present beneath the leveling layer 930. The multi-core heating cable 9 thus has a surface leveled by the leveling layer 930. Alternatively or additionally, a leveling layer can also be arranged on the opposite side.

[0351] The leveling layer 930 preferably has one or more adhesive layers, which in particular ensure improved adhesion of the multi-core heating cable 9. Alternatively or additionally, the leveling layer 930 has one or more decorative layers, which can in particular produce additional optical effects, for example, depth effects and / or optically variable effects. For example, it is possible for the leveling layer 930 to have one or more replication layers, which are or will be provided in particular with a surface structure, preferably a microstructure. The leveling layer 930 is in particular a lacquer layer.The leveling layer 930 is applied, for example, by means of at least one spray coating and / or at least one doctor blade coating and / or at least one transfer coating and / or at least one nozzle coating and / or at least one dry coating of one or more materials from the group(s) of polyesters, polyacrylates, PMMA, melamines, melamine-formaldehyde resins, epoxy acrylate, polyether acrylate, polyester acrylates, acrylates, epoxy polymethacrylate, polyurethane, polystyrene, polybutyrate, nitrocellulose, polyvinyl chlorides, ethylene-vinyl acetates, their copolymers, or similar polymers, additives, fillers, pigments, and dyes. Its layer thickness is, for example, 150 μm. The leveling layer 930 is preferably transparent and / or colorless and / or colored.

[0352] It is possible that one or more recesses and / or structures are or will be provided in the one or more cladding layers, e.g. the cladding layer 90, 91, 92, 93 and / or 94, and / or the one or more leveling layers, e.g. the leveling layer 930 and / or a leveling layer opposite it, which are in particular motif-shaped, for example having the shape of one or more lines, lettering and / or a logo. A motif formed by the one or more recesses and / or structures can, for example, also extend over several cladding layers, which is particularly preferred in the case of a strip-shaped multi-core heating cable. The one or more recesses and / or structures are or will preferably be produced by laser ablation and / or laser blackening.It is also possible to expose one or more regions of the heating wires 21, 211, 212, 213, and / or 214 by means of the recesses, in particular so that a metal used for the heating wires is visible in the heating foil composite 900, in the layer composite 2, and / or in the foil body 100 or contributes to a visible effect. In this case, the heating wires preferably remain separate from one another by maintaining a spacing between the heating wires by means of the respective sheath layers.

[0353] 21a and 21b show schematic representations of a method for creating a contact point 922 by means of a soldering point 921. To create the soldering point 921, in this example, the laser unit 920 is first used to expose the heating wires 21 and 214. The laser unit 920 is preferably guided automatically, in particular by means of a robot arm. The soldering point 921 can then be applied by means of a soldering station. The soldering station is preferably guided automatically, in particular by means of the robot arm or another robot arm. The soldering station preferably comprises at least one soldering iron and a supply of solder, for example on a roll. This makes it possible, in particular, to automate the process of creating the contact points and thus to carry out a resource-saving and safe process.

[0354] To fix the multi-core heating cable 9, it is particularly possible for the multi-core heating cable 9 to be held by means of a vacuum and / or to be fixed on the at least one carrier film, wherein the at least one carrier film is held by means of one or more holding means (for example by means of vacuum suction using vacuum strips).

[0355] By means of the soldering point 921, a parallel connection of the otherwise galvanically isolated heating wires of the multi-core heating cable 9 can be or become created. As a result, the contact point 922 can be or become created, wherein at the contact point 922, in particular in the film body 100, a connection to the energy source and / or to the control unit is or is or can be created. A section of one end of the multi-core heating cable 9 is illustrated in particular with reference to Figs. 21a and 21b. It is particularly possible that a contact point or soldering point as illustrated with reference to Figs. 21a and 21b is or will also be provided at the other end of the multi-core heating cable 9 (not shown here).

[0356] Fig. 22 shows a schematic representation of a heating foil composite 900 and of a foil body 100 with the heating foil composite 900. In particular, a cross-section is shown, wherein a plan view can be shown schematically, for example, similar to that shown in Fig. 11 (right). The foil body 100 is manufactured, for example, like the foil body 100 of Fig. 1, with the difference that the heating foil composite 900 is or will be provided instead of the layer composite 2 or as at least a part of the layer composite 2. The heating foil composite 900 comprises, in particular, the first carrier foil 20 and the multi-core heating cable 9 and can optionally also have further layers, such as the at least one decorative layer, in particular the first decorative layer 22 and / or the second decorative layer 23.

[0357] In the example illustrated by Fig. 22, the multi-core heating cable 9 is in particular a heating cable 9 as described for Fig. 17, wherein two of the outer jacket layers 91 have a first color which is a different color than a second color which the rest of the outer jacket layers 91 have, which is illustrated in Fig. 22 by the two patterned cross-sectional areas of the respective heating wires. A view from the top right thus shows the multi-core heating cable 9 in a color that is largely determined by the first color. A view from the bottom right, on the other hand, shows the multi-core heating cable 9 in a color that is largely determined by the second color.If the multi-core heating cable 9 exhibits changes in direction, such as curves, when viewed from a specific angle, it is possible that the multi-core heating cable 9 exhibits a color change corresponding to the change in direction. This can, for example, provide an optically variable effect, such as a preferably locally iridescent color effect.

[0358] It is also possible for further layers and / or plies, such as the at least one decorative layer, preferably the first decorative layer 22 and / or the second decorative layer 23, to be provided in the film body 100 with the multi-core heating cable 9 and / or to be connected thereto. The multi-core heating cable 9 can also be provided on a rear side of the carrier film 20. In particular, it is also conceivable that the multi-core heating cable 9 is or will be provided instead of the heating wire 21 described in relation to Figures 1 to 15 and / or that the heating wire 21 described in relation to Figures 1 to 15 is encompassed by a multi-core heating cable 9. First carrier component 00 Film body 01 Visible side 02 Back side Layer composite 0 First carrier film 01 Second carrier film 1 Heating wire 2 First decorative layer 3 Second decorative layer 6 Primer layer 7 Protective layer Second carrier component 1 Protective lacquer layer Substrate 1 Reflective layer 2 First adhesive layer 3 Second adhesive layer 4 Light source Contacting element 0 Contacting area 1 Non-stick layer 2 Contact reinforcement 0 Cavity 1 First tool shape 2 Second tool shape 0 Gap 1 First gap shape 2 Second gap shape 83 Fastening element, screw

[0359] 9 multi-core heating cable

[0360] 90, 91 , 92 Mantle layers

[0361] 211 , 212, 213, 214 additional heating wires 900 heating foil composite

[0362] 901 Insulation layer

[0363] 902 backing coat

[0364] 920 laser unit

[0365] 921 Solder joint 922 Contact point

[0366] 930 Leveling layer

Claims

1. A method for producing a film body (100) with a heatable surface of a cover element which is permeable in particular to electromagnetic waves, comprising the following steps, in particular in the specified order: a) Providing: at least one carrier film (20, 201), at least one decorative layer (22, 23) and at least one heating wire (21) with a minimum width and / or a smallest diameter of 50 pm and a minimum cross-sectional area of ​​2500 pm 2and / or providing: at least one carrier film (20, 201), optionally at least one decorative layer (22, 23), and a multi-core heating cable (9) comprising at least one heating wire (21) and one or more further heating wires (211, 212, 213, 214), wherein the at least one heating wire (21) and the one or more further heating wires (211, 212, 213, 214) are at least partially galvanically separated from one another, b) back-injection or back-flooding of the at least one carrier film (20, 201), the at least one heating wire (21) and / or the at least one decorative layer (22, 23) with a first flowable composition to obtain a first carrier component (1) of the film body (100); c) applying a second flowable composition to a Front side starting from the at least one carrier film (20, 201) while obtaining a second carrier component (3) on a visible side of the film body (100) and / or a protective lacquer layer (31) on a visible side of the film body (100).

2. Method according to claim 1, characterized in that in step a) the at least one carrier film (20, 201), the at least one decorative layer (22, 23) and the at least one heating wire (21) are provided in the form of a layer composite (2) or that in step a) the at least one carrier film (20, 201) and the at least one heating wire (21) and / or the multi-core heating cable (9) are provided in the form of a first composite, preferably wherein the at least one decorative layer (22, 23), in particular by an IMD process, is firmly integrated into the layer composite (2) and / or into the film body (100) in step b) or in step c).

3. Method according to one of the preceding claims, characterized in that the at least one heating wire (21) and the at least one decorative layer (22, 23) and / or the multi-core heating cable (9) are or become at least partially visible when viewed from the visible side, in particular with the human eye.

4. Method according to one of the preceding claims, characterized in that the at least one heating wire (21) and / or the multi-core heating cable (9) is or will be arranged directly adjacent to the second carrier component (3) or to the protective lacquer layer (31).

5. Method according to one of the preceding claims, characterized in that a minimum distance in a range of 0.2 mm to 4 mm, preferably 0.9 mm, is or will be formed between the at least one heating wire and the heatable surface and / or between the multi-core heating cable (9) and the heatable surface.

6. Method according to one of the preceding claims, characterized in that the second carrier component is or will be formed with a thermal conductivity of more than 0.02 W / (m*K), preferably in a range from 0.02 W / (m*K) to 0.06 W / (m*K).

7. Method according to one of the preceding claims, characterized in that agents for increasing the thermal conductivity are or will be added to the second flowable composition or the second carrier component and / or that agents for reducing the thermal conductivity are or will be added to the first flowable composition or the first carrier component.

8. Method according to one of the preceding claims, characterized in that step c) comprises one or more of the following steps: c1) over-injection of the at least one carrier film (20, 201), in particular over-injection of the layer composite (2) and / or the first composite, with the second flowable composition in the form of a plastic injection molding compound to obtain the second carrier component (3), c2) flooding of the at least one carrier film (20, 201), in particular flooding of the layer composite (2) and / or the first composite, with the second flowable composition, which comprises polyurethane or consisting of this, while obtaining the second carrier component (3), c3) painting the at least one carrier film (20, 201), in particular painting the layer composite (2) and / or the first composite, with the second flowable composition and / or painting the at least one carrier film (20, 201), in particular painting the layer composite (2) and / or the first composite, in particular the layer composite (2) provided with the second carrier component and / or the first composite, with a third flowable composition while obtaining a protective lacquer layer.

9. Method according to one of the preceding claims, characterized in that step c3) is carried out by means of wet painting, preferably spraying or flooding.

10. Method according to one of the preceding claims, characterized in that, in particular in step c2) and / or in step c3), the second and / or third flowable composition comprises or consists of a 2K varnish.

11. Method according to one of the preceding claims, characterized in that the protective lacquer layer has a layer thickness in a range of 5 pm to 20 pm.

12. Method according to one of the preceding claims, characterized in that the first carrier component (1) has a layer thickness in a range from 50 pm to 2000 pm.

13. Method according to one of the preceding claims, characterized in that the second carrier component (3) has a layer thickness in a range from 200 pm to 40,000 pm.

14. Method according to one of the preceding claims, characterized in that the film body (100) and / or the layer composite (2) and / or the first composite, and / or the at least one carrier film (20, 201) is or will be provided with a contacting element (5) or has this, in particular wherein the contacting element (5) is freely accessible at least in some regions, preferably remains freely accessible after step b) and / or c).

15. Method according to one of the preceding claims, characterized in that in the multi-core heating cable (9) the sum of the diameters and / or sum of the minimum widths of all heating wires of both the at least one heating wire (21) and the one or more further heating wires (211, 212, 213, 214) is at least 50 pm, preferably at least 80 pm.

16. Method according to one of the preceding claims, characterized in that the at least one heating wire and / or the multi-core heating cable has one or more sheath layers (90, 91, 92, 93).

17. A method for producing a heating foil composite (900), in particular the first composite and / or in the form of an insert element, preferably for use in a method according to one of the preceding claims, comprising the steps: I) providing at least one carrier film (20), II) optionally providing at least one decorative layer (22, 23) and III) Providing a multi-core heating cable (9) comprising at least one heating wire (21) and one or more further heating wires (211, 212, 213, 214), wherein the at least one heating wire (21) and the one or more further heating wires (211, 212, 213, 214) are at least partially galvanically separated from one another, IV) Connecting, preferably by material bonding, the at least one carrier film (20) and the multi-core heating cable (9) and optionally the at least one decorative layer (22, 23).

18. A method for producing a layered composite (2), in particular in the form of an insert element, preferably for use in a method according to one of the preceding claims, comprising the steps: i) providing at least one carrier film (20), ii) providing at least one decorative layer (22, 23) and iii) providing at least one heating wire (21) with a minimum width and / or a smallest diameter of 50 pm and a minimum cross-sectional area of ​​2500 pm 2and / or a multi-core heating cable (9) comprising at least one heating wire (21) and one or more further heating wires (211, 212, 213, 214), wherein the at least one heating wire (21) and the one or more further heating wires (211, 212, 213, 214) are at least partially galvanically separated from one another, iv) connecting, preferably by material bonding, the at least one carrier film (20), the at least one decorative layer (22, 23) and the at least one heating wire (21).

19. Method according to one of the preceding claims, characterized in that a first side of the at least one carrier film (20), in particular a first carrier film (20), is provided with at least one first decorative layer (22) and which is or will be provided with at least one heating wire (21) and / or the multi-core heating cable (9), and in that a second side of the at least one carrier film (20), which is opposite the first side, is or will be provided with at least one further decorative layer, in particular a second decorative layer (23), wherein the first side represents either a front side or a back side of the at least one carrier film (20).

20. Method according to one of the preceding claims, characterized in that one or more decorative layers of the at least one decorative layer (22, 23), in particular the first decorative layer (22) and / or the second decorative layer (23), are or are applied to the at least one carrier film (20, 201), in particular the first carrier film (20) and / or the second carrier film (201), over the entire surface or in the form of a motif, in particular by means of one or more of the following methods: hot stamping, cold stamping, gravure printing, screen printing, inkjet printing, flexographic printing, digital printing, offset printing.

21. Method according to one of the preceding claims, characterized in that for providing the at least one heating wire (21) in step iii) and / or the multi-core heating cable (9) in step III), the at least one heating wire (21) is provided in the form of a wire mesh and is arranged on the at least one carrier film (20).

22. Method according to one of the preceding claims, characterized in that for providing the at least one heating wire (21) in step iii), the at least one heating wire (21) is applied by single-layer or multi-layer printing of an electrically conductive lacquer, and preferably subsequently one or more electroplating steps of the printed lacquer layer, to which at least one carrier film (20) is applied.

23. Method according to one of the preceding claims, characterized in that the at least one heating wire (21) and / or the multi-core heating cable (9) is or is being introduced or applied at least partially, preferably has penetrated or penetrates at least partially, into or onto one or more layers of the layer composite (2) and / or the heating foil composite (900), in particular of the first composite, and / or the at least one heating wire (21) and / or the multi-core heating cable (9) is or is being introduced between two layers of the layer composite (2) and / or the heating foil composite (900), in particular of the first composite.

24. Method according to one of the preceding claims, characterized in that, preferably after or during one of steps iii) and iv) and / or after or during one of steps III) and IV), the following step is carried out: a1) at least partial introduction, in particular penetration, of the at least one heating wire and / or the multi-core heating cable (9) into the at least one carrier film (20).

25. Method according to one of the preceding claims, characterized in that, preferably after or during one of steps iii) and iv) and / or after or during one of steps III) and IV), the following step is carried out: a2) at least partial introduction of the at least one heating wire and / or the multi-core heating cable (9) between two layers of the layer composite and / or the heating foil composite (900), in particular of the first composite.

26. Method according to one of the preceding claims, characterized in that that the at least one heating wire and / or the multi-core heating cable (9) is or will be introduced into the at least one carrier film and / or into the at least one decorative layer and / or into the layer composite and / or into the heating film composite (900), in particular the first composite, with a penetration depth in a range of 20% to 100%, in particular 50% to 80%, of its thickness, in particular its diameter.

27. Method according to one of the preceding claims, characterized in that the at least one heating wire and / or the multi-core heating cable (9) completely passes through one or more decorative layers of the at least one decorative layer.

28. Method according to one of the preceding claims, characterized in that for the connection in step iv) and / or in step IV) a penetration of the at least one heating wire and / or the multi-core heating cable (9) is carried out by means of ultrasound, in particular with a frequency in a range from 20 kHz to 150 kHz, preferably from 50 kHz to 100 kHz.

29. Method according to one of the preceding claims, characterized in that the at least one heating wire and / or the multi-core heating cable, in particular when viewed perpendicular to a plane spanned by the layer composite and / or the heating foil composite (900), in particular the first composite, and / or the at least one carrier foil, occupies an area in a range from 0.1% to 50%, preferably in a range from 1% to 10%, particularly preferably in a range from 1% to 5%, preferably wherein the occupied area is the area of ​​the area of ​​the layer composite and / or the heating foil composite overlapping with the at least one heating wire and / or the multi-core heating cable. Composite (900), and / or the at least one carrier film, divided by the total area of ​​the layer composite and / or the heating film composite (900) and / or the first carrier film.

30. Method according to one of the preceding claims, characterized in that the at least one heating wire, preferably before step iv), has a lacquer insulation and / or, preferably before step iv), is provided with a lacquer insulation.

31. Method according to one of the preceding claims, characterized in that the at least one carrier film comprises a first carrier film (20) and a second carrier film (201), wherein a substrate (4) comprising at least one reflection layer (41) is or will be arranged between the first carrier film (20) and the second carrier film (201), and wherein the at least one heating wire (21) and / or the multi-core heating cable (9) is or will be arranged between the first carrier film (20) and the substrate (4) or between the second carrier film (201) and the substrate (4).

32. Method according to one of the preceding claims, characterized in that one or more decorative layers of the at least one decorative layer are or will be arranged between the first carrier film (20) and the substrate (4) and / or between the second carrier film (201) and the substrate (4).

33. Method according to one of the preceding claims, characterized in that the layer composite (2) and / or the heating foil composite (900), in particular the first composite, is provided with a passive heating layer.

34. Method according to one of the preceding claims, characterized in that a contacting element (5) is or will be provided in the layer composite (2) and / or the heating foil composite (900), in particular the first composite.

35. Method according to one of the preceding claims, characterized in that at least in some regions an outer surface of the contacting element (5) is or will be formed by an anti-adhesive layer (51).

36. Method according to one of the preceding claims, characterized in that, for producing the layer composite (2), the at least one carrier film (20, 201) and the at least one heating wire (21) and / or the multi-core heating cable (9) are provided in the form of a first composite, which is preferably the heating film composite (900), preferably in which the at least one decorative layer (22, 23) is integrated, in particular by an IMD method, preferably in step b) or in step c) and / or in step iv), to obtain the layer composite (2).

37. Heating foil composite (900), in particular a first composite and / or in the form of an insert element, preferably produced according to one of the preceding claims and / or for use in a method according to one of the preceding claims, comprising at least one carrier foil (20) and a multi-core heating cable (9) comprising at least one heating wire (21) and one or more further heating wires (211, 212, 213, 214), wherein the at least one heating wire (21) and the one or more further heating wires (211, 212, 213, 214) are at least partially galvanically separated from one another present, and optionally at least one decorative layer (22, 23), wherein the at least one carrier film (20) and the at least one heating wire (21) and optionally the at least one decorative layer (22, 23) are connected, preferably materially connected.

38. Layered composite (2), in particular in the form of an insert element, preferably produced according to one of the preceding claims and / or for use in a method according to one of the preceding claims, comprising at least one carrier film (20), at least one decorative layer (22, 23) and at least one heating wire (21) with a minimum width and / or a smallest diameter of 50 pm and a minimum cross-sectional area of ​​2500 pm 2 and / or a multi-core heating cable (9) comprising at least one heating wire (21) and one or more further heating wires (211, 212, 213, 214), wherein the at least one heating wire (21) and the one or more further heating wires (211, 212, 213, 214) are at least partially galvanically separated from one another, wherein the at least one carrier film (20), the at least one decorative layer (22, 23) and the at least one heating wire (21) are connected, preferably integrally connected.

39. Layer composite (2) or heating foil composite (900) according to one of the preceding claims, characterized in that the sum of the diameters and / or minimum widths of all heating wires of both the at least one heating wire (21) and the one or more further heating wires (211, 212, 213, 214) of the multi-core heating cable (9) at least 50 m, preferably at least 80 pm.

40. Layered composite (2) or heating foil composite (900) according to one of the preceding claims, characterized in that the at least one heating wire (21) and / or the multi-core heating cable (9) has one or more sheath layers (90, 91, 92, 93), each of which at least partially encloses one or more heating wires of the at least one heating wire and / or the one or more further heating wires.

41. Layered composite (2) or heating foil composite (900) according to one of the preceding claims, characterized in that one or more first jacket layers of the one or more jacket layers have a first color and that one or more second jacket layers of the one or more jacket layers have a second color which is different from the first color.

42. Layer composite (2) or heating foil composite (900) according to one of the preceding claims, characterized in that two or more first heating wires of the at least one heating wire (21 ) and one or more further heating wires run parallel to each other.

43. Layered composite (2) or heating foil composite (900) according to one of the preceding claims, characterized in that one or more second heating wires of the at least one heating wire (21) and the one or more further heating wires are twisted.

44. Layered composite (2) or heating foil composite (900) according to one of the preceding claims, characterized in that the multi-core heating cable has one or more leveling layers (930).

45. Layer composite (2) or heating foil composite (900) according to one of the preceding claims, characterized in that one or more recesses and / or structures are provided in the one or more cladding layers (90) and / or the one or more leveling layers (930), which are in particular motif-shaped.

46. ​​Layer composite (2) or heating foil composite (900) according to one of the preceding claims, characterized in that the at least one heating wire (21) and / or the one or more further heating wires (211, 212, 213, 214) consist of copper or comprise copper, in particular predominantly, ie preferably more than 50 mass percent, more preferably more than 95 mass percent.

47. Layered composite (2) or heating foil composite (900) according to one of the preceding claims, characterized in that the multi-core heating cable (9) has at one or both ends a contact point (922), in particular by means of a soldering point (921), at which several or all heating wires of the at least one heating wire (21) and the one or more further heating wires (214) are galvanically connected and / or electrically conductively contacted with one another.

48. Film body (100), in particular produced by a method according to one of the preceding claims, with a heatable surface of a cover element which is in particular permeable to electromagnetic radiation and comprises at least one carrier film (20), at least one decorative layer (22, 23) and at least one heating wire (21) with a minimum width and / or a smallest diameter of 50 pm and a minimum cross-sectional area of ​​2500 pm 2and / or comprising at least one carrier film (20), optionally at least one decorative layer (22, 23), and a multi-core heating cable (9) comprising at least one heating wire (21) and one or more further heating wires (211, 212, 213, 214), wherein the at least one heating wire (21) and the one or more further heating wires (211, 212, 213, 214) are at least partially galvanically separated from one another, in particular comprising the layer composite (2) and / or the heating film composite (900), preferably the first composite, according to one of the preceding claims, and comprising a first carrier component (1) and a second carrier component (3) and / or a protective lacquer layer, wherein the second carrier component and / or the protective lacquer layer are formed on a visible side of the film body (100).

49. Device, in particular injection molding device, in particular for carrying out a method according to one of the preceding claims, comprising: Means for forming a cavity (70), which have at least a first tool mold (71) and a second tool mold (72), which can be placed in a closed state in which the cavity is formed by at least the first tool mold (71) and the second tool mold (72), and Means for forming a defined gap (80) adjoining the cavity, which has at least a first gap shape (81) and a second gap shape (82), wherein the gap (80) in the closed state of at least the first gap shape (81) and the second gap shape (82), wherein at least one of the first gap shape (81) and the second gap shape (82) is connected to the first tool shape (71) and / or to the second tool shape (72) via a detachable connecting element (83).

50. Device according to one of the preceding claims, characterized in that the second gap shape and the second tool shape are at least partially formed by a monolithic component.

51. Device according to one of the preceding claims, characterized in that the first gap shape and the second gap shape are designed such that in the closed state the gap has a first cross-sectional area and a second cross-sectional area, wherein the first cross-sectional area is arranged closer to the cavity and has a smaller surface area than the second cross-sectional area.

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