Security element for value documents having optically variable primary surface pattern and hidden secondary surface pattern, and method for producing security element

Abstract

The invention relates to a security element (1) for value documents, said security element (1) comprising: an optically variable main surface pattern (2) comprising a metal layer (4) having a relief structure (4a); and at least one hidden secondary surface pattern (3), which comprises a plurality of elements (6) perforated on the metal layer (4) and at least one light-emitting layer (7), which is arranged at least in the region of the secondary surface pattern (3).

Description

[0001] The invention relates to a security element for value documents having an optically variable primary surface pattern and a hidden secondary surface pattern and to a method for producing the security element.

[0002] Optically variable surface patterns are known in the prior art and are used as security features and / or security elements which achieve a motion effect, for example, by means of microreflectors. In particular, security elements are known in the prior art in which the color is generated by means of nanostructures having structural dimensions in the subwavelength range.

[0003] The combination formed by the micro-mirror with the nanostructure thereon can produce colored rolling and / or 3D effects (the rolling effect "RollingBar" using micro-reflectors is shown in DE 10 2010 047 250 A1 and the 3D effect is shown in DE 10 2009 056 934 A1). Here, the micro-mirror basically generates a rolling and / or 3D effect and the nanostructure dyes it or can also produce a multi-color effect if necessary. For example, the impression of a colored visual object in motion is produced for the observer. Patent documents WO 2015 / 078572 A1 and WO 2016 / 180522 A1 also show this exemplary motion effect. The micro-reflector or micro-lens is arranged relative to the main plane in this way so that when the security element is tilted and / or rotated, the visual object has or maps a motion effect.

[0004] Typically, such nanostructures are molded into a transparent embossing lacquer and coated with a metallic or highly refractive layer, as described, for example, in patent specification WO 2021 / 028076 A1.

[0005] In order to improve security against counterfeiting, security features and / or security elements sometimes have so-called secondary features which can be read by auxiliary means, for example UV light.

[0006] The technical problem to be solved by the present invention is to provide a security element having alternative properties and effects.

[0007] Another technical problem to be solved by the present invention is to provide a security element having an alternative secondary feature.

[0008] Another technical problem to be solved by the present invention is to provide an anti-counterfeiting element with higher anti-counterfeiting security.

[0009] Another technical problem to be solved by the present invention is to make it more difficult or impossible to remove the security element from the object without causing any damage.

[0010] Another technical problem to be solved by the present invention is that the effect of the security element that can be identified with the aid of an auxiliary device appears particularly simple and / or aesthetically pleasing to an observer.

[0011] Another technical problem to be solved by the present invention is to provide a security element which is not perceived as an interfering element and makes the object for which security is provided by the security element appear more aesthetically pleasing.

[0012] The technical problem to be solved by the present invention is also to provide a corresponding method for producing a security element.

[0013] At least one of the technical problems is solved by the corresponding technical solutions of the independent claims.

[0014] According to one aspect, a security element for a value document comprises an optically variable primary surface pattern, which has or includes a metal layer, which has a relief structure, in particular a microstructure, a nanostructure and / or a subwavelength structure, and at least one hidden secondary surface pattern, which comprises a plurality of elements perforated in the metal layer and at least one luminescent layer, preferably an at least partially transparent luminescent layer, which is at least partially arranged in the region of the plurality of elements perforated in the metal layer. Elements perforated in the metal layer are also referred to as perforated elements.

[0015] The security element has additional and / or alternative properties and effects relative to known security elements. The security element has additional and / or alternative secondary features relative to known security elements. The security element has a higher security against counterfeiting than known security elements. The effect of the security element, which can be identified with the aid of an auxiliary device, is particularly concise and / or aesthetically pleasing to the observer. In addition, the security element is not perceived as an interfering element on the value document, product and / or substrate and makes the object, which is provided with security by it, more aesthetically pleasing.

[0016] The metal layer is an opaque layer, which is opaque, i.e. impermeable, to light and in particular to emitted and luminescent light (also called "Lumineszenzanregung"). The optically variable main surface pattern can form a visual object with optically variable properties. Here, the visual object can include a mapping of a real object, a symbol, a decoration, a fantasy element and / or other visual objects. The optically variable main surface pattern can be visible to an observer in reflected light. For example, daylight can be used here, which is incident or incident from the side of the security element where the observer is located. The optically variable main surface pattern can be visible or become visible to the observer, in particular, when visible light is incident. Light incident from the side of the security element facing the observer can be scattered, reflected and / or diffracted on the perforated metal layer having the main surface pattern in this way to reveal an optically variable visual object that is dependent on the viewing angle.

[0017] The relief structures, in particular microstructures, nanostructures and / or subwavelength structures, can include optically variable microreliefs and / or nanoreliefs, preferably with dimensions or sizes in and / or below the visible wavelength range, in particular holograms, micromirrors, microlenses and / or corresponding or different nanostructures.

[0018] The hidden secondary surface pattern can only be recognized with difficulty and preferably completely unrecognizable to an observer, especially in the reflected light of daylight and / or in a white light source. The hidden secondary surface pattern corresponds to the perforation of at least one luminous layer together with the metal layer, especially in the perforation area and / or according to a predetermined pattern. Here, the perforation can be produced by punching, etching or other removal or demetallization of the metal layer. The hidden secondary surface pattern can form other visual objects and / or information with the help of perforated elements or perforated structures or perforated patterns. Here, the perforated elements can form the substructure of the visual object. The perforated elements can correspond to a grid. The element can, for example, have the shape of a cross (as a substructure element) and map a cross as a superior structure on its entirety. The element perforated into the main surface pattern basically corresponds to the demetallized area of ​​the metal layer, that is, the area not blocked and / or covered by the metal layer. Therefore, the metal layer of the main surface pattern is porous or has gaps. The perforated elements can be arranged regularly or randomly in the surface. A plurality of elements perforated into the metal layer or a plurality of elements perforated on the metal layer (referred to as "perforated elements") form a substructure as described above, wherein the perforated elements can together form a superordinate (rational) visual object. In addition, the hidden secondary surface pattern can be machine-readable, i.e., when excited by luminescence, it generates invisible radiation (e.g. UV light), which is detectable for a measuring device and / or a detector.

[0019] The luminescent layer can be arranged above and / or below at least a portion of the main surface pattern and / or inside the perforated element or perforation or gap. The luminescent layer can correspond to a luminescent material layer. The area of ​​the demetallized grid of the security element, especially the thin film security element, can be used as a background by one or more fluorescent inks as a luminescent layer or as a plurality of luminescent layers. The luminescent layer can be excited in the invisible UV range and emit light in the visible wavelength range, so that the hidden secondary surface pattern becomes recognizable to the human eye. Additionally or alternatively, the emitted light can also be in the invisible wavelength range as described above and is therefore (only) machine readable. The hidden secondary surface pattern can also include machine-readable security features, which emit light that can be detected, for example, in the invisible wavelength range, especially in the UV range. The main surface pattern can include optical security features that can be identified in the visible wavelength range.

[0020] The combination of perforated elements (corresponding to the demetallized areas in the metal layer) and the luminous layer located above, below and / or between them has the effect that the hidden secondary surface pattern and any superordinate visual objects formed thereby become visible to an observer when stimulated by radiation, in particular by UV radiation. The UV radiation can impinge on the security element from the observer's side and / or from its rear side.

[0021] Furthermore, the perforations have the effect that the hidden secondary surface pattern and any superordinate visual objects formed thereby become visible to an observer in transmitted light. In this case, the light visible to the observer passes through the perforated element from the back of the security element. The visible light can be, for example, daylight and / or light from a white light source.

[0022] In other words, the hidden secondary surface pattern and the hidden superordinate visual object can become visible on the metallized thin film security element under transmitted light and under luminous excitation, such as UV light, respectively, and the thin film security element is formed by multiple demetallized small areas of the hidden secondary surface pattern.

[0023] Therefore, security elements, in particular strips, so-called LEADs, and / or patches, can be equipped with secondary features to further provide security. Secondary features are generally understood to be security features that can be authenticated by auxiliary devices, such as UV lamps. Therefore, the hidden secondary surface pattern is used as a secondary feature or a secondary security feature. LEAD corresponds to a strip and can extend over the length and / or width of a valuable document, such as a banknote. On the contrary, patches are locally limited, so the size (length and / or width) of the patch may be smaller than the valuable document itself. L-shaped patches or L-LEADs correspond to applied and / or inserted patches or strips, which have their own carriers or their own substrates. Such L-shaped patches or L-shaped strips correspond to applying a carrier to a valuable document and / or inserting it into a valuable document. T-shaped patches or T-shaped strips correspond to applied and / or inserted patches or strips, which are detached from the transfer carrier and applied to and / or inserted into a target substrate and / or a valuable document and / or inserted into a target substrate and / or a valuable document. The T-shaped patch or T-shaped strip may not have its own carrier or may alternatively have its own carrier.

[0024] The security element may have a sandwich structure having a metal layer perforated by a hidden secondary surface pattern and at least one luminous layer without determining the order of the layers, the metal layer having a relief structure of an optically variable primary surface pattern. In other words, the security element may have a sandwich structure having a metal layer with holes and at least one luminous layer in the region of the holes of the metal layer. The sandwich structure may be formed and / or arranged on a carrier, wherein the carrier may be removed from the sandwich structure. In addition to the two layers of the sandwich structure, some other functional layers may also be present, which are described in the specification as possible embodiments, for example, later. At least one luminous layer can be arranged directly above and / or below the perforated metal layer and thereby span a plurality of elements perforated in the metal layer, so that the luminous layer can be illuminated through the perforated elements, i.e. through the holes, and luminescent radiation (also called emitted radiation) can be emitted through them, i.e. for an observer, a visual object can be recognized when transmitted light and / or luminescent excitation occurs, which visual object is generated and / or composed of the elements perforated in the metal layer of the hidden secondary surface pattern, but cannot be recognized in reflected light with visible light.

[0025] The light-emitting layer may include a light-emitting material layer, a fluorescent layer and / or a phosphorescent layer, wherein the fluorescent layer may be configured to emit fluorescence and the phosphorescent layer may be configured to emit phosphorescence.

[0026] Here, luminescence can be understood as a general term for luminescence phenomena that are essentially free of thermal radiation. If the light emits luminescence radiation immediately after the luminescent material is excited, that is, within a period of a few microseconds after the luminescent material medium is excited, this is typical fluorescence. However, if the light is emitted with a longer delay time after excitation, wherein the delay time is in the range of a few seconds or longer, it is phosphorescence. Excitation by ultraviolet light (UV light) is particularly described here. However, the present invention is not limited to this excitation method. In general, the luminescent layer of the present invention can be the following types of luminescence: photoluminescence, X-ray luminescence, sonoluminescence, radioluminescence, chemiluminescence, bioluminescence, luminescence of technical luminescent materials, such as luminescence in luminescent lamps.

[0027] Photoluminescence used in the present invention is the most common and preferred luminescence mode. The UV lamp used to excite the luminescent layer can be operated simply and uncomplicatedly and can quickly and conveniently verify the security element. Photoluminescence usually occurs during and / or after irradiation or excitation with UV light, wherein, due to the loss of energy during the excitation process, the wavelength of the emitted radiation is usually greater than the wavelength of the excitation radiation.

[0028] The optically variable main surface pattern can comprise an embossed layer, in particular an embossed lacquer layer, the metal layer being arranged above and / or below the embossed layer.

[0029] The embossed layer may comprise a polymer, such as a resin and / or a lacquer, into which a relief is worked. The relief is predetermined and its structure corresponds to the optically variable primary surface pattern. The relief may have a relief structure, such as a subwavelength structure, a nanostructure and / or a microstructure, which, in particular after application of a metal layer, produces an optically variable and viewing angle-dependent effect, such as an optically variable color impression and / or another optically variable effect, such as a scrolling effect, a 3D and / or floating effect, a hologram, a motion effect or the like.

[0030] The metal layer can correspond to a thin metal film and / or to a metal layer applied by evaporation, sputtering and / or electrochemical application. Thus, the metal layer can be used as a mirror coating. Suitable reflective metals, such as aluminum, can be used as metal.

[0031] The metal layer can be arranged directly or indirectly with the intermediate layer on the embossed layer, below the embossed layer and / or above the embossed layer. The arrangement of one layer above or below another layer can generally be understood as an indirect or direct arrangement or layering.

[0032] The perforating element (on the metal layer) can also perforate the embossed layer and / or other layers, but this is not absolutely necessary but purely optional.

[0033] The security element may further comprise an opaque area surrounding the main surface pattern.

[0034] Opaque areas are areas that are essentially impermeable to visible light. Thus, a hidden first visual object area and / or a hidden second visual object area and in particular a metal layer with a primary surface pattern and a hidden secondary surface pattern therein can be embedded in an opaque (edge) area, which can appear particularly aesthetically pleasing, for example.

[0035] Opaque area can have uniform color or multiple colors, and they appear particularly beautiful.Opaque area can also comprise coating, and this coating comprises and / or covers other elements, such as adhesive layer and / or electronic component.Opaque area can comprise opaque layer or be formed by opaque layer, wherein, opaque layer can be used as substrate and / or supporting layer, especially for porous metal layer.Otherwise, opaque area can be formed by opaque layer.In any case, opaque area can be formed by opaque layer, and opaque layer supports and / or stabilizes the first visual object area and / or the second visual object area and especially the metal layer hidden from the side and / or bottom side.Therefore, for example, the metal layer can be prevented from tearing unintentionally on its side.

[0036] The security element may further comprise a transparent area surrounding the main surface pattern.

[0037] The at least partially transparent region which at least partially surrounds the main surface pattern, i.e. the perforated metal layer, can give the observer the impression that only a central element, i.e. the security element according to the invention, is arranged on the value document without further visible edge regions. Visible regions around the central element which could be considered as interfering are thus omitted, while at the same time sufficient contact surfaces are provided to fix the security element to the value document and / or the substrate. As a result, such a security element can be perceived on the value document as a particularly aesthetically pleasing feature rather than an interfering element.

[0038] In particular in the case of patches, a central region with an optically variable feature (such as a color shift) can be embedded in a transparent and / or opaque edge region, which comprises an opaque metal layer.

[0039] The perforated element can have at least one of the following shapes: a geometric shape, in particular a triangle, rectangle, rhombus, circle, preferably an annular or full-surface circle, alphanumeric characters, symbols, decorations, lines and grids. Circular elements, in particular when the radius is very small, can also be understood as dot elements.

[0040] In general, perforated elements can have individual shapes, and their entirety and arrangement can form a superior shape or structure. In other words, multiple elements that perforate (metal layer) can have substructures, wherein these elements can form a superior visual object together. For example, as described above, a small cross-shaped element can form a superior cross. The shapes of these elements are preferably recognizable to the observer itself and have corresponding sizes. For example, a uniform shape, such as only a circular shape, can exist. However, different shapes, such as a circle and a rectangle, can also exist.

[0041] The perforated element may have a size, such as length and / or width, of 10-500 μm and preferably 50-250 μm. The length (or the maximum size in one direction) and width (or the minimum size in one direction) of the perforated element are preferably within the described (or preferred) range. Alternatively, only the width is within the described (or preferred) range. For example, the circular shape may have a diameter of 10-500 μm and preferably 50-250 μm, respectively. The size of the perforated element may be uniform or non-uniform. For perforated elements of this size, their shape is still visible or recognizable under transmitted light and / or luminous excitation. The light reflected and / or scattered in the reflected light of the metal layer of the main surface pattern will not obviously exceed the light emitted by the luminous layer under luminous excitation and / or the transmitted light passing through the perforated element, respectively, so the observer can recognize the shape of the perforated element by the light passing through the perforated element.

[0042] The perforated elements can have a lateral distance of 10-500 μm, preferably 50-250 μm, from each other. The distance between the perforated elements is preferably greater than their size. The lateral distance or side distance between two perforated elements can be in particular the distance between two mutually facing contour edges of the two perforated elements. Here, the lateral distance is selected so that it corresponds to the shortest distance between two mutually facing contour edges of the two perforated elements. Alternatively, the lateral distance can also be the distance between the midpoint and / or the geometric center of gravity or center. These distances are preferably selected so that they can be perceived as individual perforated elements and their shapes are still substantially recognizable.

[0043] In the region of the perforation elements, the surface proportion of the perforation elements (ratio of perforation area to perforated area) is preferably between 10% and 60%, preferably between 20% and 49%, particularly preferably between 20% and 42%.

[0044] The luminescent layer can be excited in a discrete wavelength or in a continuous spectral range in the UV range. The luminescent layer can preferably only be excited by light in the range between 315nm and 405nm, further preferably between 350nm and 400nm. For example, it can be excited at 254nm, 395nm and / or 365nm. The luminescent layer can have a luminescent material, which can be excited in the wavelength range and thus emits light with different, usually longer wavelengths. Different luminescent materials with different excitation wavelengths and / or emission wavelengths or frequencies can also be used. In addition, there can also be a plurality of luminescent layers with different excitation wavelengths and / or emission wavelengths in the security element, which are arranged, for example, adjacent to each other, superimposed and / or arranged in a plane. Luminescent layers with different excitation wavelengths and / or emission wavelengths are also referred to as different types of luminescent layers here. The security element can thus be read under the influence of multiple excitation wavelengths, which achieves further anti-counterfeiting security. In addition, broadband UV excitation can also make hidden secondary surface patterns visible, and the secondary surface patterns have a variety of emission colors, which appear particularly beautiful. One emission wavelength may be in the visible range and the other emission wavelength may be in the invisible range, so that the visible emission can be detected by an observer and the invisible emission can be detected (machine-readable) by the device, thereby achieving additional security regarding authentication.

[0045] At least in the region of the hidden secondary surface pattern, in particular in the region of the plurality of perforated elements, at least one semi-transparent layer may be arranged, which has a transparency of at least 25%. Above and / or below the primary surface pattern, at least one semi-transparent layer may be arranged substantially over the entire surface. The semi-transparent layer may have a filtering effect, so that light of a certain wavelength cannot pass through the layer. Additionally or alternatively, the semi-transparent layer may also correspond to a protective layer.

[0046] At least a portion of the plurality of elements perforating the metal layer may be at least partially filled with an adhesive material, which may thereby form an island-like layer, and wherein the adhesive material may preferably comprise a UV-hardening polymer.

[0047] The security element can then be applied to the valuable document in such a way that the adhesive material is in contact with the surface of the valuable document and / or the substrate. If the adhesive material comprises a UV-hardened polymer, the polymer can be hardened by irradiation with an appropriate wavelength after being arranged on the valuable document. If the irradiation of the adhesive layer is achieved by a plurality of perforated elements, a corresponding plurality of hardened adhesive islands will be formed in the adhesive layer. The formation of adhesive islands is particularly suitable for the anti-counterfeiting of valuable documents, because the security element cannot be removed non-destructively. The multi-point, more stable fixation of the security element on the valuable document can be reliably achieved, and when an attempt is made to remove the security element, the security element tears. Therefore, the security element cannot be transferred non-destructively from one valuable document to another object.

[0048] The adhesive material or the bonding layer is preferably at least partially transparent in such a way that the light for exciting the luminescent layer and the light emitted thereby passes through or is transmitted through and does not interfere with or even prevent the function and effect of the security element according to the invention.

[0049] According to one aspect, the method for producing a security element comprises: arranging a metal layer on a substrate and / or a carrier, in particular a carrier film, and forming a relief structure in order to produce an optically variable primary surface pattern; perforating the metal layer in the form of a plurality of perforated elements or demetallizing the metal layer in order to produce a secondary surface pattern; and arranging an at least partially transparent luminescent layer in the region of the plurality of perforated elements of the hidden secondary surface pattern. The method for producing a security element has all the advantages and effects of the security element in the corresponding embodiment.

[0050] The substrate may optionally be removable and / or peelable, so that the security element can be removed from the substrate after its production and transferred to the value document. In this case, there may be an adhesive layer between the substrate and the (uppermost / lowermost) layer of the security element, or the adhesive layer may be applied after the substrate is removed. The substrate may already be a component of the value document.

[0051] The formation of the relief structure can include: arranging an embossed layer, in particular an embossed lacquer layer, on the substrate and in particular on the substrate or on another layer arranged on the substrate; embossing the relief structure into the embossed layer; and applying the metal layer on the embossed layer. The embossed layer, in particular an embossed lacquer layer, for example a polymer, in particular a resin, is particularly suitable for being embedded in the relief structure (microstructure and / or nanostructure and / or subwavelength structure), and then arranging the metal layer on the relief structure to form the main surface pattern.

[0052] The perforation and / or demetallization of the metal layer may include at least one of the following methods: a cleaning method, an etching method, laser ablation, metal pigment printing with cutouts, a metal transfer method, stamping, mechanical and / or electrochemical stripping, peeling.

[0053] Alternatively, the metal layer can also be coated or applied or arranged (for example by vapor deposition) in such a way that no full-surface coating is formed, but rather a metal coating (also referred to as "metallization") with predetermined gaps that correspond to the perforated elements of the hidden secondary surface pattern. Before the vapor deposition of the metal layer, a mask corresponding to the shape of the plurality of perforated elements can be applied and subsequently removed (stripped, removed and / or etched). Thus, a plurality of elements perforated in the metal layer can be formed as "shadows" during the metallization or metal coating process.

[0054] The first luminescent layer and / or the second luminescent layer are preferably printed. One or both luminescent layers may be vapour deposited.

[0055] The first and second luminous layers can be arranged in transparent areas and / or perforated areas. The method can further include arranging a metal layer, which includes a relief structure, which corresponds to the optically variable surface pattern, and / or is regionally opaque and / or is provided with perforated elements, thereby forming one or more opaque areas and / or one or more perforated areas.

[0056] According to one aspect, a security element for a valuable document comprises: an optically variable main surface pattern visible in reflected light; and an element pattern perforated on the main surface pattern which is visible in transmitted light and is visible or becomes visible upon luminescent excitation, in particular fluorescent excitation.

[0057] The perforation element pattern substantially corresponds to the plurality of perforation elements of the secondary surface pattern described here and has the property that it emits light, in particular visible light, when excited by luminescence and partially transmits light to the back side of the security element in transmitted light.

[0058] According to other aspects and other embodiments described herein, the security element may have the above features, but are not explicitly mentioned as a combination here. The optically variable main surface pattern may form or be a visual object with optically variable properties. The element pattern may have a substructure formed by a perforated element, which interrupts or has holes in the main surface pattern, especially the metal layer of the main surface pattern. At least partially transparent and luminous, especially fluorescent materials can be filled or applied in, on and / or under the perforated elements of the element pattern. The element pattern is only visible under transmitted light and luminous excitation, especially fluorescent excitation.

[0059] The term "transmitted light" is generally understood to mean that light, such as daylight, is incident from the side of the security element facing away from the observer (the back side, "from behind") through the perforations of the secondary surface pattern and / or the element pattern. The element pattern can include other visual objects and / or information formed by the perforated structure (substructure formed by the perforated element). Thus, the secondary surface pattern or the element pattern can become visible to the viewer when transmitted light is incident and when light of at least one specific excitation wavelength that can excite the luminescent material used is incident.

[0060] The optically variable primary surface pattern may be formed by at least one visual object layer having a relief structure, such as a microstructure, a nanostructure and / or a subwavelength structure. The at least one visual object layer may comprise: a metal layer; and preferably an embossed layer, the metal layer being arranged above and / or below the embossed layer.

[0061] At least one at least partially transparent luminescent layer, in particular at least one fluorescent layer, can be arranged above and / or below the main area pattern, at least in the region of the element pattern.

[0062] In general, the security element can be an element applied to a substrate and / or placed in a substrate as a "strip" (e.g. end to end on a banknote) or as a "lead" or as a "patch" (locally defined). The security element can be an element arranged as a "thread", placed on a substrate and / or a carrier and / or applied in a substrate and / or a carrier. The security element can also be created directly on a target substrate, such as a value document.

[0063] In general, the security element can exist with or without its own substrate or its own carrier. The substrate or carrier can be a plastic carrier and / or a film, such as a PET film. The substrate or carrier can be transferred to the valuable document or can be present in advance on the transport / manufacturing carrier. The substrate and / or carrier of the valuable document can include one or more paper layers or one or more plastic layers or a combination of paper layers and plastic layers.

[0064] Generally speaking, the security features of the security element may be features printed on or present in the substrate, for example. The security features may include features used to provide security for banknotes, such as printed infrared / ultraviolet dyes and / or luminescent layers and / or fibers.

[0065] Generally speaking, the term "optically variable" primarily means that different impressions related to the viewing angle, viewing direction (including tilt / rotation), side (front / back), reflection (looking down) and / or transmission (see-through, i.e. facing the light source) of the security feature become visible or recognizable to the observer, wherein the optically variable security feature can have color effects, moving visual objects, floating visual objects and / or scrolling effects.

[0066] Figure 1a A schematic diagram showing a security element according to one embodiment under reflected light;

[0067] Figure 1b Show Figure 1a Schematic diagram of the anti-counterfeiting element under transmitted light;

[0068] Figure 1c Show Figure 1a Schematic diagram of the anti-counterfeiting element under luminescence excitation;

[0069] Figure 1d Show Figure 1c A fragment of a schematic diagram of a security element schematically showing a portion of a plurality of perforated elements of a secondary surface pattern;

[0070] Figure 1e Show Figure 1d A partial view according to a possible implementation manner;

[0071] Figure 1f Show Figure 1d According to Figure 1e A partial view of an alternative embodiment of;

[0072] Figure 1g Shown in Figure 1e A schematic diagram of a perforated element shown in ;

[0073] Figure 1h A schematic diagram showing a security element according to another embodiment under transmitted light and / or luminescent excitation;

[0074] Figure 2a A schematic diagram showing a layered structure of a security element as a T-bar according to one embodiment;

[0075] Figure 2b A schematic diagram showing a layered structure of a security element as an L-shaped strip according to one embodiment;

[0076] Figure 3 A schematic diagram showing a layered structure of a security element as a patch according to one embodiment;

[0077] Figure 4aA schematic diagram showing a layered structure of a security element as an L-shaped patch according to one embodiment;

[0078] Figure 4b A schematic diagram showing a layered structure of a security element as a T-shaped patch according to one embodiment; and

[0079] Figure 5 A schematic diagram of a method for producing a security element according to one embodiment is shown.

[0080] In the following, unless otherwise indicated, the same reference numerals are used for identical and identically acting elements and / or features. A redundant description of repeated features and possibly a redundant use of repeated reference numerals are partially avoided. The different embodiments and features of the figures described below can be explicitly combined but are not to be understood as a closed description.

[0081] Figure 1a is a schematic diagram of a security element 1 under reflected light according to one embodiment. Figure 1b yes Figure 1a Schematic diagram of the security element 1 in transmitted light, Figure 1c yes Figure 1a Schematic diagram of the security element 1 under luminescence excitation (also referred to as "excitation").

[0082] The anti-counterfeiting element 1 of this embodiment has an outer contour 1a of a star and can be used to inspect and protect valuable documents and / or valuables. Figure 1a The optically variable main surface pattern 2 shown in FIG. 1 forms the shape of a star 2a which appears three-dimensionally to the observer. Figure 1a As shown, under reflected light, i.e. when visible light, for example white light, falls on the security element 1 from the side of the observer, stars 2a that emerge three-dimensionally from the surface appear as visual objects of the main surface pattern 2. The stars 2a that are generated by the optically variable main surface pattern 2 and appear to emerge from the surface are indicated by dashed lines. The main surface pattern 2 generates the three-dimensionally appearing visual object 2a because it has a relief structure 4a, which has a metal layer 4 located thereon, which can generate this visual object. In this case, the relief structure 4a corresponds to a microstructure and / or nanostructure, which comprises a plurality of mirror elements (such as micromirrors) and / or lens elements (such as microlenses), which can generate interference that is dependent on the viewing angle and thus generate this 3D effect.

[0083] The metal layer does not fill the entire star shape of the security element 1, but forms a smaller star within the outer contour 1a of the star of the security element 1. The metal layer is surrounded by a transparent area 8, which is formed in the area between the outer contour 1a and the smaller star-shaped contour of the metal layer. The transparent area 8 can form a substantially transparent surface. The transparent (edge) area 8 completely surrounds the main surface pattern 2 (as an inner area). In particular, in the design scheme designed as a strip (optionally also for a patch), the main surface pattern 2 is surrounded by exactly two lateral transparent edge areas. This can prevent the metal layer from being accidentally torn and / or worn on its side, for example.

[0084] For example, the anti-counterfeiting element can include a carrier layer and / or an embossed lacquer layer and / or a transparent protective layer and / or an adhesive layer in the transparent area 8. The above layers can be present in the same manner in (the area of) the main surface pattern 2, where the metal layer is preferably located on the embossed lacquer layer and / or under the protective layer. The transparent area 8 can also regionally include the first and / or second luminescent layer as a transparent luminescent layer. For example, the metal layer can be prevented from being accidentally torn and / or worn on its side.

[0085] In the region of the main surface pattern 2, the metal layer can be present in a perforated manner in certain areas. In this respect, the main surface pattern 2 comprises an opaque area 4 and one (or more) perforated areas 5. These areas of the main surface pattern cannot be identified in reflected light and are therefore not shown. Figure 1a The viewer sees the visual object of the main surface pattern 2 in the opaque areas 4 (and preferably in the perforated areas 5). The transparent areas 8 are preferably barely recognizable to the user in reflected light, and therefore in particular not recognizable outside of glancing angles.

[0086] The embodiment shown is only shown with the star shape as an example and any other shape is conceivable. The three-dimensional effect shown of the optically variable main surface pattern 2 is also only shown by way of example, and instead or in addition, the security element can have other effects, such as color effects, scrolling, floating or motion effects.

[0087] Only in Figure 1a Under the reflected light shown, the hidden secondary surface pattern 3 cannot be identified or perceived. Figure 1b In the case shown (transmitted light), the perforated area 5 is visible. Figure 1c Only in the situation shown (luminescence activation) can the hidden secondary surface pattern 3 be seen or recognized by the observer.

[0088] exist Figure 1b1 shows a security element 1 observed under transmitted light. The metal layer comprises an opaque area 4 and a perforated area 5, in which a plurality of perforated elements 6 are present. The elements 6 perforated in the metal layer are therefore illuminated “from behind” or from the side of the security element 1 facing away from the observer. Circular perforated elements 6 with a regular distance from one another and a uniform radius form a substructure 15. The observer can recognize that the plurality of perforated elements 6 together have a cross-shaped superordinate shape 5a. The superordinate shape 5a of the perforated area 5 with perforated elements 6 can also be referred to as a light-transmitting visual object of the security element.

[0089] In the region of the main surface pattern 2, there is one (or more) perforated region 5 and at least one non-perforated or opaque region 4. The perforated region 5 is preferably surrounded by the non-perforated or opaque region 4. In the present example, the main surface pattern 2 itself is surrounded by a transparent region 8. The transparent region 8 is not recognizable in transmitted light (preferably also in reflected light). The substructure 15 is preferably also not recognizable to an observer with the naked eye (without auxiliary means) in transmitted light.

[0090] The hidden secondary surface pattern 3 has not only a plurality of elements 6 perforated on the metal layer 4, but also at least one (preferably at least partially transparent) luminescent layer, which is arranged in the region of the perforated elements 6. The luminescent layer can be at least partially transparent so that light can pass through from the back. At least one luminescent layer can be arranged above, below and / or in at least a portion of the perforated element 6. In particular, the at least one luminescent layer can be present in the perforated region 5 and the edge region 8.

[0091] exist Figure 1c In the embodiment of the present invention, UV light including a corresponding excitation wavelength is irradiated onto an area of ​​the secondary surface pattern 3 to excite the luminescent material of the luminescent layer. The luminescent material can be irradiated in transmitted light ("from behind", i.e. the side of the security element 1 facing away from the observer) and / or in reflected light ("from the front", i.e. the side of the security element 1 facing the observer). Since the excitation wavelength and / or emission wavelength of the luminescent layer may be different, the hidden secondary surface pattern 3 can be excited regionally with different excitation wavelengths, or include two hidden visual object areas, and / or can present multiple colors, especially when the luminescent layers are arranged at least partially adjacent to each other under the perforated element 6.

[0092] For example, the first luminescent layer may be present in the perforated region 5 and the second luminescent layer may be present over the entire surface (or both in the perforated region 5 and in the edge region 8). Figure 1cThe representation is the emission of the two luminescent layers, i.e. the hidden visual object area 3, in the perforated area 5, and the emission of the second luminescent layer or its visual object area 3b in the transparent area 8. In addition, only the first / second visual object area 3 / 3b can be displayed when the luminescent excitation is only performed using the first / second excitation wavelength. If the emission of the two luminescent layers can be distinguished by the observer in terms of color, the security element is particularly easy to check.

[0093] For an observer, the substructure is preferably not visible to the naked eye during the luminescence excitation process. The observer can see the luminescence of the luminescent layer in the perforated area 5a (and the transparent area 8) and can recognize the shape of the perforated area and / or, if necessary, the luminescent layer subarea located thereunder.

[0094] Figure 1d yes Figure 1c (or 1b) and schematically shows a portion of a plurality of perforation elements 6 of a secondary surface pattern 3. It can be seen that the perforation elements 6 form a substructure 5, wherein the perforation elements 6 are circular, have uniform size and uniform distance from each other. Figure 1e and Figure 1f They are Figure 1d Detailed illustration of two possible alternative embodiments of the invention. Figure 1e The perforated element 6 can be circular and designed in the whole surface or in a dotted manner. Therefore, light can be transmitted and emitted in the entire area of ​​the circular perforated element 6. As an alternative to this, Figure 1e The perforated element 6 in the embodiment can be designed as a circle or annular shape. Therefore, light can only be transmitted and emitted in the annular region of the perforated element 6.

[0095] according to Figure 1e and Figure 1f Now, another advantageous effect of the perforated element 6 will be briefly described. The security element can include an adhesive layer and / or be fixed to the target substrate via an adhesive layer. The adhesive layer is preferably an adhesive layer that can be hardened by (UV) radiation. If the adhesive layer that can be hardened by radiation is now irradiated through the perforated element 6 (with corresponding UV light), the adhesive layer is only hardened locally, i.e. in the area of ​​the perforated element 6. As a result, at the time of irradiation or transfer to the target substrate, an adhesive layer that is only hardened locally (or in islands) is formed. Figure 1e and Figure 1f, the position of the adhesion island 9 in the otherwise unhardened adhesion layer is shown in a simplified manner, the size and position of which correspond to the perforated elements 6 in the metal layer 14 (located thereon). This is an optional method to prevent the security element 1 from being removed from the target substrate without loss and transferred to other substrates and / or objects different from the original valuable document, to which the security element is connected via the adhesive island 9. The security element (via the adhesion island 9) is better connected locally to the valuable document, and when the security element 1 is peeled off from the valuable document, the security element 1 or the target substrate will tear. All perforated elements 6 shown here can optionally produce such hardened adhesion islands 9 made of adhesive or other adhesive materials, without explicit mention in the corresponding paragraphs of the following or previous description.

[0096] Figure 1g is Figure 1e Schematic diagram of the dot-shaped perforating element 6 shown in . The distance between the first perforating element 6a and the second perforating element 6b is da. The distance between the second perforating element 6b and the third perforating element 6c is db. The distances d1 and d2 between two immediately adjacent perforating elements 6 are the same here. The distances d1 and d2 correspond to the shortest distance between the corresponding outer contours of the two perforating elements 6. The size of the perforating element 6, i.e. the radius r, is also uniform here.

[0097] exist Figure 1h An alternative to the previous perforated element 6 is shown in FIG. Figure 1h is a schematic diagram of a security element 1 under luminescence excitation by UV-A light of a first and a second excitation wavelength (and / or under transmitted light) according to another embodiment.

[0098] Each perforated element 6 has the shape of a cross. The substructure 15 formed by the arrangement of the cross-shaped perforated elements 6 again forms a cross as a superordinate shape 5a. The observer can recognize the superordinate shape 5a and the shape of the perforated elements 6. In the example of FIG. 2h, the individual perforated elements 6 can, for example, be provided with different luminous layers 7a, 7b, 7c as a background alternately or in a (multi-color) pattern. The perforated elements 6 can be designed (in terms of their size) in such a way that the shape of the perforated elements 6 can only be recognized by the observer using auxiliary devices, such as a magnifying glass or a camera (see FIG. 2h). Figure 1c ) or can be identified by the naked eye without auxiliary devices (see Figure 1h ). Similarly, the substructure 15 can be recognized only by auxiliary means, such as a magnifying glass or a camera, or can be recognized by the naked eye without auxiliary means.

[0099] Alternatively, a small micro symbol, such as "A", can also generate a macro symbol, such as "A". A small micro symbol, such as "A", can also generate a micro symbol, such as "B". In addition, different symbols, such as "§&A+T&#..." can also generate or form a macro number, such as "100".

[0100] Different possible layer structures of the security element 1 are shown below for different embodiments. These layer structures each have two types of luminescent layers 7 a , 7 b , they partially overlap each other. The two light-emitting layers 7 a , 7 b With different excitation and / or emission wavelengths. In all the following designs, the described designs, in particular regions including vision object regions, perforated regions, opaque regions and / or transparent (edge) regions, may also be present even if not mentioned again or shown graphically.

[0101] Figure 2a Schematic diagram of a layered structure 200a of a security element 1 as a transfer strip (T-LEAD) on a transfer carrier 300 according to one embodiment. The layered structure 200a is located on the transfer carrier 300 in the form of a carrier film. First, a release layer 202 (and / or an adhesive layer) is applied to the transfer carrier 300. The release layer connects the other layers to the transfer carrier 300 on the one hand, but when necessary, i.e. when the security element is transferred to the target substrate, the release layer can remove the other layers from the transfer carrier 300. Therefore, the transfer carrier 300 can be peeled off from the remaining layers. Therefore, the transfer carrier 300 can be regarded as not belonging to the security element 1.

[0102] The release layer 202 is adjacent to the embossed layer 4b having the relief structure 4a and the metal layer 14 located therebelow. The embossed layer 4b having the relief structure 4a and the metal layer 14 essentially forms an optically variable main surface pattern 2. The relief structure 4a can be processed into the embossed layer 4b during the manufacturing process. The metal layer 14 can then be coated and / or arranged to form a mirror coating. The metal layer 14 has perforations in the form of perforated elements 6. These perforations can be formed after the metal layer 14 is applied according to the different methods described herein. At least two luminous layers 7a, 7b can be applied directly or indirectly to the perforated metal layer 14 together with an intermediate layer. In Figure 2aIn the embodiment of , there are three exemplary luminescent layers 7a, 7b in the region, which can be fluorescent layers in particular. The first luminescent layer 7a (first type luminescent layer 7a, shown on the far left) with a first excitation wavelength and a first emission wavelength does not overlap with the second luminescent layer 7b (second type luminescent layer 7b, shown on the far right) with a second excitation wavelength and a second emission wavelength, while another first luminescent layer 7a or first type luminescent layer 7a shown in the middle overlaps with the second luminescent layer 7b with the second excitation and emission wavelengths (right side).

[0103] The two luminous layers 7a, 7b can usually be adjacent to each other and basically in one plane or at least partially overlapped. Thus, the secondary surface pattern may require multiple excitation wavelengths to be fully recognized, but can also emit different wavelengths or colors, thereby appearing particularly beautiful and effective, and making the security element 1 have a higher verification quality.

[0104] The luminescent layers 7a, 7b are covered by a primer layer and / or a protective layer 203 to prevent them from falling off the metal layer. An HSL layer (HSL: heat seal lacquer) as an adhesion layer 204 is arranged on the primer layer and / or the protective layer 203. The anti-counterfeiting element, in particular the layers 4b, 14, 7a, 7b and 203, can be fixed on the target substrate by means of the adhesion layer 204. The metal layer 14 can be understood as a layer that is opaque (impermeable) to the luminescent excitation light and the emitted light. However, the luminescent layers 7a, 7b, the HSL layer 204 and the primer layer and / or the protective layer 203 are at least partially transparent to the luminescent excitation light and the emitted light, so that the observer can recognize the effect achieved from this side, that is, the hidden secondary surface pattern 3 during luminescent excitation. During the luminescent excitation process, especially after the transfer carrier 300 is peeled off, the hidden secondary surface pattern 3 may also be recognized from the opposite side. The release layer 202 can be transparent to the emitted light. After the security element has been transferred (peeled off from the transfer carrier 300), it may be visible. The carrier layer may at least partially or completely remain on the substrate and / or at least partially or completely be transferred to the target substrate, e.g. Figure 2b Shown in.

[0105] Position A2 represents an alternative or additional position, namely a position between the release layer 202 and the embossing layer 4 b , in particular an embossing lacquer layer, at which the luminescent layer or one or more additional or alternative luminescent layers can be arranged.

[0106] Figure 2b 2 is a schematic diagram of a layered structure 200b of a security element 1 according to one embodiment, the layered structure 200b being a strip (L-LEAD) that can be transferred to a target substrate. Figure 2aThe main difference in the layered structure of is that the carrier layer 201 is part of the security element 1. Optionally, an uppermost ink receiving layer 205 is also present.

[0107] Position B2 represents another alternative or additional position, namely, a position between the ink receiving layer 205 and the substrate 201, especially the PET layer, at which the luminescent layer or one or more additional or alternative luminescent layers can be arranged.

[0108] Figure 3 Schematic diagram of a security element 1 as a patch on a transfer carrier 300 according to one embodiment. In particular, there are multiple patches (not shown) on the transfer carrier 300. Unlike the layered structures 200a and 200b, the layered structure of the security element has multiple, here four HSL sublayers 204. These HSL sublayers then jointly form an adhesion layer with the target substrate. In addition, the layered structure has an optional carrier layer 211 and multiple optional protective layers or primer layers 213.

[0109] In this and all other embodiments, the transfer carrier 300 can have two carrier layers 301, which are connected to each other via an adhesive layer 302. The transfer carrier 300 comprises an uppermost carrier layer 301 serving as a support film and an indirect carrier layer 301 located therebelow, which is separated from the support film by a laminating adhesive layer serving as an adhesive layer 302. As is known, the layer structure of the security element on such a transfer carrier can be well divided / separated into a plurality of regions (e.g. by stamping or laser cutting the layer structure) without the transfer carrier 300 being torn as a result. The uppermost three layers 301 and 302 can be peeled off or removed from the security element 1.

[0110] In the layered structure of the security element, two different types of luminescent layers 7a, 7b (ie, different excitation wavelengths) are arranged adjacent to each other. The carrier layer 211 of the security element is located between the protective layer 203 and the lowermost HSL sublayer 204.

[0111] Figure 4aSchematic diagram of a layered structure 400a of a security element 1 as a patch according to one embodiment, which patch can be transferred to a target substrate. The layered structure 400a has in the following order: the uppermost PET layer 201, the lacquer layer 401, the other PET layer 201, the other lacquer layer 401, the other PET layer 201, the primer layer 203, the embossing lacquer layer 4b, the perforated metal layer 14, two different types of luminescent layers 7a, 7b stacked and adjacent to each other, the protective layer 203 and the HSL layer 204. Positions A4 and B4 represent alternative or additional positions where the luminescent layer or other or alternative luminescent layers can be arranged, namely A4: between the release layer 202 and the other lacquer layer 401, B4: between the uppermost primer layer 203 and the embossing lacquer layer 4b.

[0112] Figure 4b is a schematic diagram of a layered structure 400b of a security element 1 as a T-shaped patch on a transfer carrier 300 according to one embodiment. The layered structure 400b has in the following order: an uppermost PET layer 301, a first release layer 402 and a second release layer 403, an embossing lacquer layer 4b, a perforated metal layer 14, two different types of luminescent layers 7a, 7b stacked and adjacent to each other, a primer layer 203 and an HSL layer 204. Position C4 represents an alternative or additional position where other or alternative luminescent layers can be arranged, namely C4: between the second release layer 403 and the embossing lacquer layer 4b.

[0113] The described hierarchical structures 200a, 200b, 400a, 400b are all schematically equipped with the UV-A active luminescent layer (also referred to as UV-A layer) shown. In the hierarchical structure, more UV active layers, especially UV-A active layers, such as three, four, five, six or more, can also be present. Here, these UV layers can be adjacent to each other or overlap. These hierarchical structures can also be used in wires. However, since the area of ​​the wire is usually small, this use is limited. Preferably, the wire is placed in a paper substrate in a paper machine. In principle, all designs are suitable for placing between the sublayers of the target substrate. In these designs, for example, a second adhesion layer can be used, which is arranged on the other side of the security element to achieve good adhesion of the security element in the target substrate.

[0114] The layers of the layered structures 200a, 200b, 400a, 400b or the previous figures with the same reference numerals and / or names may have similar or identical properties, such as transparency or partial transparency, so that redundant information is not reproduced separately for each embodiment.

[0115] Figure 5 is a schematic diagram of a method 100 for manufacturing a security element 1 according to one embodiment. Figure 5 The left-aligned method steps 101, 102, 106 and 107 shown in FIG. 1 correspond essentially to the method 100 according to the invention. Figure 5 The indented method steps 103 , 104 , 105 and 108 shown in FIG. 1 correspond to preferred method steps.

[0116] According to one embodiment, a method 100 for manufacturing a security element 1 comprises: arranging 101 a metal layer 4 on a substrate and forming 102 a relief structure 4a to produce an optically variable primary surface pattern 2; perforating and / or demetallizing 106 the metal layer 4 in the form of a plurality of perforating elements 6 to produce a secondary surface pattern 3; and arranging 107 an at least partially transparent luminous layer in the area of ​​the secondary surface pattern 3.

[0117] In the method 100, forming the relief structure 4a may include the following steps: arranging 103 an embossed layer 4b on a substrate; embossing 104 the relief structure 4a into the embossed layer 4b; and applying 105 a metal layer 4 onto the embossed layer 4b. In the method 100, perforating and / or demetallizing 106 the metal layer 4 may also include at least one of the following method steps: a cleaning method, an etching method, laser ablation, metal pigment printing with cutouts, a metal transfer method, stamping, mechanical and / or electrochemical stripping, peeling.

[0118] The manufactured security element can be applied to a target substrate or placed in a target substrate and comprises an adhesion layer. Here, the formation 108 of adhesion islands can be realized in the adhesion layer. For this purpose, the adhesion layer that can be hardened by (UV) radiation is irradiated through the perforated element with (UV light). Hardened adhesion islands are formed in the adhesion layer. Compared with the unhardened surrounding areas of the adhesion layer, the adhesion islands locally provide better adhesion between the security element and the target substrate. Therefore, the lossless detachment of the security element from the target substrate can be prevented.

[0119] The method 100 may be performed in the order shown, but the method 100 does not have to be performed in this order.

[0120] Some general descriptions, examples and features will also be made or described below for (other) embodiments:

[0121] Generally speaking, wavelengths of 365 nm and 254 nm are suitable for wavelength-dependent fluorescence when detecting the second type of security features.

[0122] In the optically variable micro-reliefs (such as holograms, micro-mirrors, nanostructures, etc.) of the metal layer (reflective metal), the reflective metal (such as aluminum) can be removed in a small area to produce perforated elements. This demetallization can be formed by suitable methods, such as cleaning methods, etching methods, laser ablation, metal pigment printing with cutouts, metal transfer methods, etc. The perforated elements corresponding to the demetallized areas can preferably be grid points and / or grid elements with a diameter of 10-500 μm (preferably 50-250 μm). Here, the grid elements can not only be points, but also, for example, small alphanumeric characters, symbols, decorations or lines. The grid elements can be arranged regularly or randomly. The entirety of the grid points can represent information or visual objects. However, the size of these demetallized grid elements is preferably no more than 5 times the resolution of the human eye (100 μm).

[0123] When using high-resolution symbols, suitable demetallization methods can be used to achieve the required resolution. In this case, in a top view viewed in reflection, the grid elements or cutouts (so-called "negative text") are barely perceptible, since these areas are not as bright as the adjacent reflective areas to the human eye. These areas of the thin-film security element with the demetallized grid are then backed by one or more luminescent and / or fluorescent inks (luminescent layers).

[0124] A semi-transparent layer with a transmittance of more than 25% can also be applied to the demetallized area. Luminescent and / or fluorescent inks can be excited at one or more wavelengths (such as UV broadband at 365nm, 395nm, 254nm). Only under transmitted light and UV light can the demetallized image, that is, the substructure composed of perforated elements, be seen with the naked eye. In the area of ​​the grid-type demetallized part, the area share of luminescence and / or fluorescence is significantly smaller than the area share in the outer area, and the outer area can be completely demetallized. This leads to a certain extent that the grid area is not as bright as the outer area, but this can be compensated by cleverly choosing the color, for example, the inner fluorescent color is brighter and the outer fluorescent color is darker. Compensation can also be achieved by changing the pigment content or reducing the layer thickness. The same compensation principle can be applied when the semi-transparent metallized part is not retained.

[0125] List of Reference Numerals

[0126] 1Anti-counterfeiting elements

[0127] 1a The outer contour of the star

[0128] 2 (Optically variable) main surface pattern

[0129] 2a Visual object with 3D effect (star) produced by optically variable main surface pattern

[0130] 3 (Hidden) Secondary Face Patterns

[0131] 4 Opaque Area

[0132] 4a embossed structure

[0133] 4b embossing layer

[0134] 5 Perforation Area

[0135] 5a A superordinate shape (eg a cross) formed by a perforated element or a substructure of a perforated element

[0136] 6. Components with holes (on the metal layer) or components with holes in the metal layer

[0137] 6a First (perforated) element

[0138] 6b Second (perforated) element

[0139] 6c Third (perforated) element

[0140] 7a A first light-emitting layer having a first excitation and / or emission wavelength

[0141] 7b A second light-emitting layer having a second excitation and / or emission wavelength

[0142] 8 Opaque Areas

[0143] 9 Attached Island

[0144] 14 Metal Layers

[0145] 15 Substructure

[0146] 100 Method for producing a security element

[0147] 101 Arranging a metal layer on a substrate

[0148] 102 forming a relief structure to produce an optically variable main surface pattern

[0149] 103 Arrange the imprint layer on the substrate

[0150] 104 Pressing the relief structure into the embossed layer

[0151] 105 Applying a metal layer on the embossed layer

[0152] 106: punching holes in the metal layer in the form of a plurality of perforated elements to produce a secondary surface pattern

[0153] 107 Arranging an at least partially transparent luminescent layer in the region of the secondary surface pattern

[0154] 108 Formation of Attachment Island

[0155] 200a Layered structure of security element as transfer strip

[0156] 200b Layered structure as laminated strip of security element

[0157] 201 carrier layer

[0158] 202 release layer and / or adhesive layer

[0159] 203 primer or protective layer

[0160] 204 Adhesion layer

[0161] 205 ink receiving layer

[0162] 211 carrier layer

[0163] 213 protection layer

[0164] 300 Transfer carrier for anti-counterfeiting elements

[0165] 301 film layer, especially PET carrier and / or support film

[0166] 302 Laminating Adhesive

[0167] Layered structure of 400a security element as a laminated patch

[0168] Layered structure of 400b anti-counterfeiting element as transfer patch

[0169] 401 paint layer

[0170] 402 Release Level 1

[0171] 403 Release Layer 2

[0172] A. Position of an alternative or additional light-emitting layer in a layered structure

[0173] B Other positions in the layered structure for alternative or additional light-emitting layers

[0174] Other positions in the C layered structure for alternative or additional light-emitting layers

[0175] da first distance: lateral distance between the first and second perforated elements

[0176] db Second distance: lateral distance between the second and third perforated elements

[0177] r is the radius of the circular element

Claims

1. A security element (1) for a valuable document, wherein: The anti-counterfeiting element (1) comprises: an optically variable main surface pattern (2), the main surface pattern comprising a metal layer (4) having a relief structure (4a); and At least one hidden secondary surface pattern (3), the secondary surface pattern comprising a plurality of elements (6) perforated on the metal layer (4) and at least one luminous layer (7), the luminous layer being at least partially arranged in the region of the plurality of elements (6) perforated on the metal layer (4).

2. The security element (1) according to claim 1, wherein: The light-emitting layer (7) comprises a fluorescent layer and / or a phosphorescent layer, wherein the fluorescent layer is configured to emit fluorescence and the phosphorescent layer is configured to emit phosphorescence.

3. The security element (1) according to claim 1 or 2, wherein: The optically variable main surface pattern (2) comprises an embossed layer (4b), above and / or below which the metal layer (4) is arranged.

4. The security element (1) according to claim 1, which also comprises a transparent region (8) surrounding the main surface pattern.

5. The security element (1) according to claim 1, wherein: The perforated element (6) has at least one of the following shapes: a geometric shape, in particular a triangle, rectangle, rhombus, circle, preferably a ring or full-surface circle, alphanumeric characters, symbols, decorations, lines and grids.

6. The security element (1) according to claim 1, wherein: The perforated element (6) has a length and / or width of 10-500 μm and preferably 50-250 μm.

7. The security element (1) according to claim 1, wherein: The perforated elements ( 6 ) have a lateral distance from one another of 10-500 μm, preferably 50-250 μm.

8. The security element (1) according to claim 1, wherein: The luminescent layer ( 7 ) can be excited at discrete wavelengths or in a continuous spectral range in the UV range, in particular between 315 and 405 nm, further preferably between 350 and 400 nm.

9. The security element (1) according to claim 1, wherein: At least one semi-transparent layer is arranged at least in the region of the secondary surface pattern (3), said semi-transparent layer having a transparency of at least 25%.

10. The security element (1) according to claim 1, wherein: The security element (1) also comprises an adhesive layer (204) which can be activated by radiation, wherein adhesive islands (9) can preferably be produced in the adhesive layer (204) by irradiating the adhesive layer (204) through the element (6) which perforates the metal layer (14).

11. A method (100) for manufacturing a security element (1), comprising: Arranging (101) a metal layer (4) on a substrate and forming (102) a relief structure (4a) in order to produce an optically variable main surface pattern (2); perforating (106) the metal layer (4) in the form of a plurality of perforating elements (6) to produce a secondary surface pattern (3); and An at least partially transparent luminous layer (7) is arranged (107) in the region of the plurality of perforated elements (6).

12. The method (100) according to claim 11, wherein: Forming the convex structure (4a) comprises: Arranging (103) an imprinting layer (4b) on a substrate; embossing (104) the relief structure (4a) into the embossed layer (4b); and A metal layer (4) is applied (105) onto the embossed layer (4b).

13. The method (100) according to claim 11 or 12, wherein: Perforating (106) the metal layer (4) comprises at least one of the following methods: a cleaning method, an etching method, laser ablation, metal pigment printing with cutouts, a metal transfer method, stamping, mechanical and / or electrochemical stripping, peeling.

14. The method (100) according to any one of claims 11 to 13, wherein: When the produced security element is applied or placed on a target substrate, adhesion islands (9) are formed (108), in particular by irradiating the radiation-curable adhesion layer (204) through the perforated element (6).

15. The method (100) according to claim 14, wherein: The adhesive layer (204) having a UV-hardening polymer and / or the adhesive islands (9) of the adhesive layer (204) provide locally better adhesion to the target substrate as an anti-detachment protection for the security element (1).

Images