EP4334138A1 - Verfahren zum herstellen eines sicherheitselements und sicherheitselement - Google Patents
Verfahren zum herstellen eines sicherheitselements und sicherheitselementInfo
- Publication number
- EP4334138A1 EP4334138A1 EP22717729.2A EP22717729A EP4334138A1 EP 4334138 A1 EP4334138 A1 EP 4334138A1 EP 22717729 A EP22717729 A EP 22717729A EP 4334138 A1 EP4334138 A1 EP 4334138A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- adhesion promoter
- stabilization
- transfer element
- feature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/324—Reliefs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/351—Translucent or partly translucent parts, e.g. windows
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/369—Magnetised or magnetisable materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/378—Special inks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/378—Special inks
- B42D25/382—Special inks absorbing or reflecting infrared light
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/378—Special inks
- B42D25/387—Special inks absorbing or reflecting ultraviolet light
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
- B42D25/45—Associating two or more layers
- B42D25/465—Associating two or more layers using chemicals or adhesives
- B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives
Definitions
- the invention relates to a method for producing a security element, a security element and a security document.
- WO 2014/095039 A1 describes a continuous, windowless sheet of security paper that is provided with a stabilization coating.
- EP 2461970 B1 describes a production process for security paper and a security paper obtainable with it, a window opening being provided which is covered by a film. A stabilization coating is provided around this opening for stabilization.
- DE 102019005551 A1 describes a method for producing security paper, in which a stabilization coating is applied to the back and a transfer element is applied to the front of a continuous section of a paper substrate.
- the stabilization coating can cover less than 98% of the area of the transfer element in plan view and/or extend beyond the transfer element.
- the invention is based on the object of specifying an efficient method for producing a security element and a security element, with which the counterfeit security of the security element is promoted at the same time.
- the method for producing a security element with a security feature comprises the following steps. providing a sheet-like stretched substrate having a front and a back and at least one portion; applying a stabilizing coating to the backside portion of the substrate; applying an adhesion promoter coating in the front side portion of the substrate; and applying a transfer element to the adhesion promoter coating. Seen in a plan view of the planar substrate, the transfer element is arranged delimited on at least a first and a second side by an edge lying within the section. The stabilization coating and the adhesion promoter coating are each formed on at least one of the first and second sides of the transfer element, extending beyond its edge.
- the stabilization coating and the adhesion promoter coating each comprise a feature component, in particular an optical or machine-readable feature component.
- the stabilization coating and the adhesion promoter coating with their feature components together form the security feature.
- the method produces a security element in which an optical or machine-readable feature component of the stabilization coating is combined with an optical or machine-readable feature component of the adhesion promoter coating to form a security feature.
- the reuse of the two selected functional coatings simplifies production, but at the same time increases the security of the security element.
- the ability to rework is made more difficult by the integration of the transfer element.
- the detachability of the transfer element is ensured by the adhesion promoter coating. difficult and recognizable in the case of a successful detachment by the destruction of the adhesion promoter layer.
- the stabilization coating and/or the adhesion promoter coating are particularly preferably formed so as to reach beyond the edge of the transfer element.
- the stabilization coating on the first and second sides of the transfer element can extend beyond its edge.
- the stabilization coating can only extend beyond its edge on one of the two sides, ie in particular not extend beyond at least the second side.
- the adhesion promoter coating on the first and the second side of the transfer element can extend differently beyond its edge or only on the first side beyond its edge, i.e. in particular not on the second side.
- the stabilization coating and/or the adhesion promoter coating can (each) be formed with at least one pattern.
- the pattern can be different.
- the stabilizing coating preferably has at least one first pattern and the adhesion promoter coating has at least one second pattern.
- the stabilization coating preferably comprises a first, in particular optically effective or machine-readable, feature component and the adhesion promoter coating comprises a second different, in particular optically active or machine-readable, feature component.
- the asymmetrical arrangement and/or the pattern can be used to design the optical security feature that is visible to the viewer or machine-readable. It should be noted that by a pattern in the corresponding coating only optionally an asymmetrical arrangement arises. For example, if the same pattern is placed symmetrically on either side of the rim, or a pattern is placed within the rim, the array extending beyond the rim will remain symmetric.
- the stabilization coating and the adhesion promoter coating can therefore have the same pattern and different feature components, different patterns and the same feature components, or preferably different patterns and different feature components.
- the stabilization coating and the adhesion promoter coating could both be arranged symmetrically to the transfer element, only one could be arranged asymmetrically, or both could be arranged asymmetrically.
- the stabilization coating and/or the adhesion promoter coating can be arranged symmetrically and have different feature components, (one or both) can be arranged asymmetrically and have the same feature components, or preferably arranged differently asymmetrically and have different feature components.
- the stabilizing coating and/or the adhesion promoter coating could have patterns. Since the two coatings are on different sides of the transfer element, security features can be created for a wide variety of viewing and lighting situations (top view/through view/front/back).
- the stabilizing coating and the adhesion promoter coating are preferably arranged in register with one another in at least one direction—preferably in two mutually perpendicular directions.
- the stabilization coating and/or the adhesion promoter coating can be formed in register in at least one direction—preferably in two mutually perpendicular directions—to the transfer element and/or to a pattern of the substrate, such as a watermark.
- the feature components of the two coatings can be optically effective or machine-readable feature components for the viewer.
- An optically effective feature component is visible to the viewer when irradiated, in particular in the UV range, in the visible range or in the IR range. It is preferably only visible to the viewer when irradiated in the UV range or IR range, ie in particular either transparent in the visual range or designed in the color of the (paper) substrate.
- a machine-readable component is preferably only mechanically recognizable, in particular magnetically recognizable or, upon irradiation, for example in the UV range, in the visible range or in the IR range, only spectrally recognizable by machine.
- the feature component when illuminated in one of the ranges (IR, VIS, UV), the feature component can be excited to emit one or more specific wavelengths (luminescence) or reflect the radiation unchanged, optionally only reflect selectively for one or more specific wavelengths .
- the security feature is particularly preferably an optical security feature that is visible to the viewer, preferably with both patterns.
- the security feature in a predetermined viewing situation, preferably a predetermined viewing and lighting side, being visible.
- the security feature is visible in reflected light and/or in transmitted light from one viewing side, optionally from both viewing sides.
- the security feature can be perceptible to the viewer with a change of viewing and/or lighting side. By changing the viewing side (front/back) and/or the lighting side (reflected light/transmitted light), the different optical effects of the two feature components and/or their different patterns become recognizable.
- the adhesion promoter coating and the stabilization coating are on opposite sides of the substrate, only the pattern on the illuminated side of the security element is visible, for example when viewed in incident light (and a paper substrate with correspondingly low translucency). For example, only the fluorescent pattern of the illuminated side is visible in UV reflected light if the paper substrate absorbs the UV radiation (or the luminescent radiation of the opposite side).
- both patterns e.g. the UV-fluorescent patterns
- the security feature formed by the two coatings can be a machine-readable security feature, which is preferably machine-readable with a single measurement step. In particular, neither the Measurement and / or lighting side are changed, a separate measurement of the feature components are made to capture the effect of the two feature components.
- the security feature could also only be machine-readable with several, preferably simultaneous, measuring steps of different types or different measuring situations, in particular the measuring and/or lighting side.
- the authenticity of the security element can thus be checked by the viewer using the optically effective security feature or by the checking machine using the machine-readable security feature.
- the stabilization coating and/or the adhesion promoter coating are applied outside the edge with its at least one pattern.
- the transfer element can have opaque areas and only optionally have transparent or translucent areas. Configurations with two patterns lying outside the edge are therefore particularly advantageous, in particular in cases in which the transfer element has opaque areas or because it is independent of the presence/position of the opaque area.
- the at least one pattern of the stabilization coating and/or the adhesion promoter coating can be formed within the edge.
- An embodiment with a pattern lying within the edge is particularly advantageous for transparent or translucent transfer elements or when arranged in a transparent or translucent area of the transfer element.
- the transfer element is usually as a strip, which extends in particular re over an entire length or width of the substrate, or as Patch, which only extends locally, be designed.
- the transfer element has a basic shape, the basic shape being in particular a geometric basic shape, in particular a rectangle, circle, polygon or regular n-gon, or a motif-like basic shape.
- the transfer element is bounded on exactly two sides by its two edges.
- As a patch it is bordered on the two sides by two sections of its peripheral border.
- the transfer element is preferably an optically variable transfer element with more than two transfer element layers.
- An adhesive layer as a transfer element layer connects the transfer element (permanently) to the adhesive coating.
- Further transfer element layers can be in particular: a relief structure layer, in particular an embossing lacquer layer with an embossed relief structure, and/or a reflection-increasing layer, which in particular follows the relief of the relief structure layer, and/or a color-shifting transfer element layer, which in particular comprises at least one electrical layer or comprises a layer with color-shifting pigments, and/or a machine-readable feature layer, in particular with an IR feature, a phosphorescent feature or a magnetic feature; and/or a carrier layer, in particular made of paper or plastic, which is preferably transparent.
- the transfer element will have an adhesive layer, which is preferably a thermally activatable or steel-hardening adhesive layer.
- the transfer element can have its own carrier layer, in particular carrier film. Alternatively, the transfer element is carrier-free.
- the transfer element When applied to the adhesion promoter coating, the transfer element—with or without its own carrier film—is generally transferred as an element from an intermediate carrier to the coated substrate.
- the adhesion promoter coating promotes the adhesion of the trans- ferelements on the substrate. Adhesion promoter coatings are also referred to as primer coatings. They are well known and should not be confused with the adhesive layer that connects the transfer element to the substrate.
- the adhesion promoter component of the adhesion promoter coating is therefore only discussed as an example.
- the adhesion promoter coating can contain at least one or more identical or different elements selected from a polyurethane, an acrylate, an isocyanate, an epoxy, an aziridine, a carbodiimide and any other
- an aqueous polyurethane and/or acrylate dispersion in particular an aqueous polyurethane and/or acrylate dispersion.
- the isocyanate, the epoxide, the aziridine and/or the carbodiimide can be used as crosslinkers for the aqueous polyurethane and/or acrylate dispersion.
- the starting materials for a lacquer material can be provided.
- the stabilization coating per se is also well known in terms of its purpose and design. For example, reference can be made to EP 2461970 B1 and in particular to the formation as a crosslinked lacquer layer.
- the stabilization coating maintains the flatness of the substrate, in particular during the application of the transfer element and/or during later printing steps, such as banknote printing, in particular intaglio printing (steel engraving). If the transfer element is applied or, in the case of banknote printing, intaglio printing is carried out, a compressive force is applied to the front side of the substrate with the transfer element, which counteracts the stabilizing coating by means of a counterforce.
- a possible stabilization component of the stabilization coating is therefore only briefly discussed as an example.
- the stabilization coating can have at least one or more identical or different contain different elements selected from a polyurethane, an acrylate, an at least partially, preferably completely, UV-curable material and any combination thereof, in particular an aqueous polyurethane and/or acrylate dispersion. It is also possible to use 100% UV-curable mixtures, aqueous UV-curable mixtures and dual-cure mixtures, for example mixtures that can be cured with UV light and a crosslinking agent.
- the transfer element has a basic shape defined by the two-sided or peripheral edge of the transfer element.
- the edge is linear or circular, i.e. the basic shape is an n-corner, rectangle or circle.
- transfer elements with a motif-like basic shape such as apple-shaped patches or strips with round or angular bulges, are also known. Since the two coatings are applied functionally for the transfer element, they are applied at least oriented to the basic shape of the transfer element.
- DE 102019005551 A1 shows corresponding examples of the stabilization coating.
- the asymmetrical arrangement already described (reaching over the edge in different ways) of one or both coatings can be designed independently of or depending on the basic shape.
- the sections (with a straight edge) of the (stabilizing or adhesion promoter) coating that reach over the edge in strip form on both sides can have different widths.
- a transfer strip (with a straight edge) could be provided with an elongated oval or elongated cloud-shaped (stabilizing or adhesion promoter) coating in plan view.
- one of the two or both coatings can be applied with at least one independent pattern—independent of the basic shape of the transfer element.
- the pattern(s) of the (both) coating(s) can alternatively or additionally comprise repeating pattern elements.
- a geometric, character-like (letter(s), number(s), symbol(s)) or motif-like recess in the corresponding coating can serve as a pattern.
- the at least one pattern of one or both coatings can comprise (optionally separate) geometric, character-like (letter(s), number(s), symbol(s)) or motif-like pattern elements, which are preferably separate from the further section (s) of the corresponding coating are arranged.
- the two coatings each extend with their areas FS and FH, area FS of the stabilization coating outside the edge and area FH of the adhesion promoter coating outside the edge, beyond the edge of the transfer element.
- the larger surface (FS or FH) of the two surfaces (FS, FH) of the coatings extending beyond the edge is at least 1.2 times larger than the (other of the two) smaller surface (FH or FS). So FS > 1.2*FH or FH > 1.2*FS applies.
- the larger area is between 1.2 and 8 times larger than the smaller of the two areas.
- 8*FH > FS > 1.2*FH or 8*FS > FH > 1.2*FS applies. More preferably, the larger area is between 1.25 and 4 times larger. Accordingly, either 4*FH > FS > 1.25*FH or 4*FS > FH > 1.25*FS applies.
- the stabilization coating and the adhesion promoter coating overlap when viewed from above on the planar substrate, but at least partially do not overlap outside the edge.
- a first Motif of the stabilization coating and a second motif of the adhesion promoter coating simultaneously visible to the viewer.
- the two patterns preferably complement each other to form an overall motif that is optionally repeated in one direction, or to form a continuous motif.
- the stabilization coating and/or the adhesion promoter coating are printed on, in particular by means of screen printing, optionally by means of offset printing, gravure printing or flexographic printing.
- the two coatings can be applied in one operation, so the coatings and their patterns are in register with each other.
- the two coatings can also be applied in two operations in register with one another, in particular with two or more than two patterns that are in register with one another—at least in one direction. These measures promote the efficiency of the process and reduce its costs.
- the stabilization coating is preferably applied before the transfer element.
- the stabilization coating can be applied before the primer coating and before the transfer element, or it can be applied after the primer coating and before the transfer element. It is only conceivable as an alternative to apply the stabilization coating after the adhesion promoter coating and after the transfer element.
- the stabilization coating comprises a stabilization component and may comprise less than 10% of the (first) feature component, in particular between 0.1 to 10%, more preferably between 0.1 to 3% of the first feature component.
- the adhesion promoter coating comprises an adhesion promoter component and preferably less than 10% of a (second) feature component, in particular between 0.1 to 10%, more preferably between 0.1 to 3% of the second feature component.
- the coating or the adhesion promoter coating can also contain less than 10% of a further (third or fourth) feature component, in particular between 0.1 to 10% or 0.1 to 5%, more preferably between 0.1 to 3%.
- the sum of the proportions of the first and third or second and fourth feature components in the respective coating is preferably less than 10%.
- the percentages relate to parts of the dry weight in the applied state.
- the stabilization coating and/or the adhesion promoter coating can extend over more than 50%, preferably less than 98%, over the surface of the transfer element, as is described in more detail in DE 102019005551 A1, for example.
- the feature components of the stabilization coating and the adhesion promoter coating are both luminescent feature components.
- the luminescent feature components can be luminescent, preferably fluorescent or phosphorescent, colorants, which are preferably present as luminescent dyes or as luminescent pigments.
- the luminescent feature components can each range in different spectral ranges, be excitable, in particular in the UV range and in the IR range, or both be excitable in the same spectral range, in particular in the UV range or in the IR range.
- the luminescent feature components can be excitable separately from one another and/or together, in particular with non-overlapping, partially overlapping or with overlapping excitation bands.
- the (paper) substrate can be translucent for the excitation light or contain an excitation light absorber, such as a UV or IR absorber.
- the stabilization coating and/or the The adhesion promoter coating can contain (additionally) an excitation light absorber, such as a UV or IR absorber, as a further component.
- At least one of the feature components of the stabilization coating and the adhesion promoter coating can be an optically variable feature component.
- the optically variable feature component in particular a pigment or dye, is an iridescent feature component (e.g. pigment that shimmers in rainbow colors), a specularly reflecting feature component (e.g. platelet-shaped, specularly reflecting pigment, preferably magnetically alignable) or a color-shifting feature component (interference pigment or diffractive effect pigment).
- the optically variable pigments can, for example, be platelet-shaped and/or be iridescent pigments. In particular, these pigments may be flakes coated or coated with metal oxide (e.g.
- the optically variable feature component of the stabilization coating or the adhesion promoter coating can advantageously differ from at least one optically invariable feature component of the other coating, which is formed in particular by a color-stable colorant and/or luminescent colorant and/or a matting agent.
- at least one of the feature components of the stabilization coating and the adhesion promoter coating is a magnetic feature component or the stabilization coating and/or the adhesion promoter coating additionally comprises a further, magnetic feature component.
- the stabilization coating and/or the adhesion promoter coating with the magnetic feature component are preferably applied in such a way that a magnetic code can be read.
- the stabilization coating and the adhesion promoter coating can contain the same magnetic feature component, in particular with low or high magnetic strength, or each comprise different magnetic feature components, in particular with low magnetic strength in one and with high magnetic strength in the other of the two coatings. In this way, both coatings can be combined to form a common, magnetically testable security feature.
- At least one of the feature components of the stabilization coating and the adhesion promoter coating is a coloring feature component (or additionally: the stabilization coating and/or the adhesion promoter coating additionally comprises a further coloring feature component).
- the color-imparting feature component(s) can be a semitransparent colorant, such as dyes or color pigments, in particular pigments with variable or constant color.
- the coloring feature component(s) of the two coatings can be of different colors. The colors of the coloring
- Feature component(s) are preferably visible in transmitted light, with a mixed color resulting in transmitted light, in particular—if the stabilization coating and adhesion promoter coating overlap.
- the adhesion promoter coating preferably extends beyond the edge of the transfer element by 0.5 to 24 mm, preferably by 1 to 12 mm, as seen in a plan view of the flat substrate. The same initially applies to the stabilization coating.
- an area of the adhesion promoter coating or the stabilization coating that extends beyond the edge of the transfer element corresponds to less than 150% of the area of the transfer element, preferably less than 100%, more preferably between 5% and 95%.
- a surface of the adhesion promoter coating that extends beyond the edge of the transfer element can be larger than the surface of the stabilization coating that reaches out; this variant is particularly advantageous because it has a smaller layer thickness.
- the adhesion promoter coating and the stabilization coating are only provided locally in the section of the transfer element. They each cover less than 50% of the front and back of the substrate.
- the substrate can contain an element selected from a reduced thickness, a varying thickness, a reduced thickness forming a substrate pattern, a varying thickness forming a substrate pattern, a window or a hole, and any combination thereof.
- the substrate is particularly translucent in the visual range and/or UV/IR range, ie not transparent and not opaque but semi-transparent.
- the substrate is preferably a paper substrate. A thinning of the substrate provided in this way in the region of the transfer element and beyond is advantageous since the substrate then becomes more translucent. In addition, the thinning of the substrate can also be modulated or configured figuratively.
- a transfer element with its own carrier layer can be combined with a window or a hole in the substrate.
- a further stabilization or adhesion promoter coating with a further (fifth) feature component can be applied in the section on the Substrate applied to who.
- the additional stabilization or adhesion promoter coating is, in particular, an additional stabilization coating with the same stabilization component or an additional adhesion promoter coating with the same adhesion promoter component.
- the additional stabilization or adhesion promoter coating can also be printed in the aforementioned one operation or in one of the two aforementioned operations.
- the additional stabilization coating is applied to the back of the substrate or the additional adhesion promoter coating to the front of the substrate in a third or fourth pattern, preferably in certain areas, in particular in strips. Areas of the additional stabilization or adhesion promoter coating can be surrounded by the stabilization or adhesion promoter coating on at least two sides, preferably on exactly two sides or completely.
- the further stabilization or adhesion promoter coating is also applied both within the edge of the transfer element and beyond it, as seen in plan view.
- a sixth, optical or machine-readable, feature component could be applied, in particular printed, to the stabilization coating with its first (and third) feature component or to the adhesion promoter coating with its second (and fourth) feature component.
- a multi-layer structure which has four layers arranged one on top of the other, namely the stabilization coating, the substrate, the adhesion promoter coating and the transfer element.
- the layers are arranged in such a way that the substrate is located at least partially, preferably completely, between the stabilization coating and the adhesion promoter coating and is enclosed in this area, in particular over a large area.
- the pattern of the stabilization coating and the pattern of the adhesion promoter coating can be designed and/or arranged as follows, particularly when viewed from above on the planar substrate: at least partially, preferably completely, matched to one another; at least partially, preferably completely, complementing one or more motifs, in particular in transmitted light; at least partially, preferably fully, non-overlapping; and/or at least partially, preferably completely, overlapping.
- the pattern of the stabilization coating and the pattern of the adhesion promoter coating can form a security feature, selected from a common front/back side feature, a common incident light/transmitted light feature or a common transmitted light feature.
- the pattern of the stabilization coating and/or the pattern of the adhesion promoter coating can be formed at least partially, preferably completely, outside the edge on one or more sides of the transfer element and/or on the same or different sides of the transfer element, seen in a plan view of the flat substrate. In this way, a large variety of variants of the security element can be produced.
- the pattern or patterns can be formed, for example, by means of gaps in the stabilization coating and/or in the adhesion promoter coating.
- the stabilization coating and/or the adhesion promoter coating can be formed, for example, by means of gaps in the stabilization coating and/or in the adhesion promoter coating.
- Pattern on one or both sides of the transfer element one or more motif elements, one or more numbers, one or more digits, one or more letters or a currency symbol and any combination thereof.
- a full-area pattern of the stabilization coating and/or the adhesion promoter coating, in particular also under the transfer element, for example a pattern with recessed numbers, can be formed.
- the present security element in particular in the form of security paper or a banknote, is preferably produced using a method according to one of the preceding aspects.
- the security element comprises: an areally extended substrate which has a front side and a back side and at least one section; a stabilizing coating in the backside portion of the substrate; an adhesion promoter lamination in the front side portion of the substrate; and a transfer element on the primer coating. Seen in a plan view of the planar substrate, the transfer element is delimited on at least a first and a second side by an edge lying within the section.
- the stabilization coating and the adhesion promoter coating are each formed on at least one of the first and second sides of the transfer element, extending beyond its edge.
- the stabilization coating and the adhesion promoter coating each comprise a feature component, in particular an optical or machine-readable feature component.
- the stabilization coating and the adhesion promoter coating together form the security feature.
- the two coatings are arranged or provided with a pattern and the feature components are selected in such a way that an optical or a machine-readable security feature is created that is perceptible to the viewer.
- the security element is particularly suitable for improving the security against forgery of security papers for banknotes, but also for other documents of value, such as identity cards, passports, etc.
- the substrate is preferably paper, particularly preferably banknote paper, for example as a paper web or sheet of paper .
- substrates made of polymers or composite products, such as hybrid composites, such as foil-paper composites or foil-foil composites, can also be used.
- the present solution is actually only relevant if the plastic or composite substrate is exceptionally so soft (in particular stretchable and deformable) that the transfer element, which for example comprises a carrier layer that is less stretchable or deformable compared to the composite, requires the use of a Stabilization coating on the back to maintain the flatness of the substrate makes necessary.
- the substrate can be a single-layer or multi-layer substrate.
- the method comprises the following steps. providing a planar extended substrate which has a front side and a back side and at least one section; applying a stabilizing coating to the backside portion of the substrate; applying an adhesion promoter coating in the section on the front side of the substrate; and applying a transfer element to the primer coating. Seen in a plan view of the flat substrate, the transfer element is delimited on at least a first and a second side by an edge lying within the section.
- the stabilization coating and the adhesion promoter coating are each formed on at least one of the first and second sides of the transfer element, extending beyond its edge.
- the stabilization coating and the adhesion promoter coating each comprise a feature component, in particular an optical or machine-readable feature component.
- the stabilization coating and the adhesion promoter coating with their feature components each form an independent security feature.
- One of the two coatings, in particular the adhesion promoter coating preferably forms an optical security feature and the other of the two coatings, correspondingly in particular the stabilization coating, forms a machine-readable security feature.
- the security element in particular in the form of a security paper or a bank note, which is preferably produced using the other method, comprises: an areally extended substrate which has a front and a back side and at least one portion; a stabilizing coating in the backside portion of the substrate; an adhesion promoter coating in the front side portion of the substrate; and a transfer element on the primer coating.
- the transfer element is delimited on at least a first and a second side by an edge lying within the section, and the stabilization coating and the adhesion promoter coating each extend beyond the edge of the transfer element on at least one of the first and second sides educated.
- the stabilization coating and the adhesion promoter coating each comprise a feature component, in particular an optical or machine-readable one.
- the stabilization coating and the adhesion promoter coating with their feature components each form an independent security feature.
- One of the two coatings, in particular the adhesion promoter coating preferably forms an optical security feature and the other of the two coatings, correspondingly in particular the stabilization coating, forms a machine-readable security feature.
- the other method or the security element with the independent security features increases the number of security features provided and in particular their variety (but without using the advantages of a common security feature).
- the security element can be obtained or obtained using a method according to one of the above embodiments and modifications.
- the security element can also have the features and configurations of the security element obtained and obtainable by the measures of the method of the above embodiments and modifications.
- the same features, advantages and effects can be realized with the embodiments and modifications of the security element as with the method for producing a security element of the above embodiments and modifications, in particular with identical and/or analogous features.
- a further embodiment relates to a security document, in particular a bank note, having a security element according to one of the embodiments and modifications described here.
- FIG. 2 schematically shows a cross-sectional view of an exemplary security element obtainable with the method of embodiments
- FIG. 3 schematically shows a cross-sectional view of an exemplary security element obtainable with the method of embodiments
- FIG. 5 schematically shows a cross-sectional view of an exemplary security element obtainable with the method of embodiments
- FIG. 6 schematically shows a cross-sectional view of an exemplary security element obtainable with the method of embodiments
- FIGS. 9a to 9c each schematically show a top view of the security element of FIG. 7, in a view in transmitted light, a view of the front of the security element/ Substrate in reflected light and a view of the back of the security element/substrate in reflected light, and Fig. 10 schematically steps of the method of embodiments.
- FIG. 1 schematically represents a cross-sectional view of an exemplary security element 10 obtainable with the method of embodiments, steps a) to c) of which are illustrated in FIG. 10 with steps S1 to S3.
- step a an elongated, flat, rectangular substrate 12 with two long and two short sides and a rear side 15 and a front side 14 is provided (step S1 of FIG. 10).
- the (paper) substrate 12 has a section 16 in which, in step b), a stabilization coating 17 is applied to the rear side 15 of the substrate and an adhesion promoter coating 18 is applied to the front side 14 of the substrate (step S2 of FIG. 10).
- step c) a transfer element 19 with its adhesive layer is applied to the adhesion promoter coating 18 (step S3 of FIG. 10). So in section 16, for example, an optically variable strip as
- Transfer element applied which connects the long sides of the rectangular substrate 12 in section 16 and which itself can already have a large number of un ferent security features.
- the stabilization coating 17 and the adhesion promoter coating 18 are printed on in step b), preferably applied by means of screen printing, either in two or in one operation. With just one work step, the quality for processing and circulation is promoted at the same time and an optical safety feature generated.
- the printing units can be controlled in the longitudinal direction with an averaged printed register mark. The register mark can be recognized and read with an optical scanning in reflection.
- the circumferential position of the respective printing unit can be determined. This can be done using a scanning device on the side screen holder. The same register mark can be used for applying the transfer element if this step is done in a separate operation on a separate machine.
- an optically variable multilayer structure is formed overall from the stabilization coating 17, the substrate 12, the adhesion promoter coating 18 and the transfer element 19, as can be seen from FIG.
- the stabilization coating 17 contains, for example, 80-95% of a conventional stabilization component and, in addition, a fluorescent dye with a dry weight content of approximately 1%. It is formed, for example, with a width of 21 mm.
- a standard primer which is also less than 10%, in particular
- the adhesion promoter coating 18 is applied with a width of 18 mm, for example.
- the fluorescent dyes of the two coatings 17, 18 differ, preferably in their emission color, for example red-emitting in the adhesion promoter coating 18 and blue-emitting in the stabilization coating 17. Both fluorescent dyes preferably appear transparent in the visible range (or have the color of the substrate).
- a transfer strip with a constant width of 14 mm is provided as the transfer element 19 . It includes sub-layers that are not shown, in particular Specially an adhesive layer, a relief structure layer with a reflection-increasing layer designed in certain areas, and a foil layer.
- the multi-layer transfer element 19 is significantly thicker (> 10-20 gm) than the adhesion promoter layer 18, whose maximum thickness is more in the single-digit gm range (e.g. 0.25 gm to 5 gm ) is, or the stabilization coating 17, the thickness of which is at most in the low two-digit gm range (approx. 2 gm to 20 gm or 2-6 gm).
- the stabilization coating 17, the adhesion promoter coating 18 and the transfer element 19 are positioned on the substrate 12 in such a way that the distance to the nearest short side of the substrate 12 is at least 25 mm.
- the transfer element 19 is delimited by an edge 22 on at least a first and a second side 20, 21 and is arranged in step c) with its edge 22 lying within the section 16 on the adhesion promoter coating 18.
- the stabilization coating 17 is arranged in step b) in such a way that, after the transfer element 19 has been applied in step c), it extends beyond the edge 22 on the first and the second side 20, 21 of the transfer element 19.
- the stabilizing coating 17 extends in strips on both sides by 3.5 mm over the edge.
- the adhesion promoter coating 18 is arranged in step b) in such a way that, after the transfer element 19 has been applied, it extends beyond the edge 22 of the transfer element 19 on the first and second side 20, 21 thereof. In the example from FIG. 1, the adhesion promoter coating 18 extends in strips on both sides by 2 mm over the edge.
- the stabilization coating 17 and the Haftvermittlerbe coating 18 can optionally be formed with two patterns 30, the after step c), ie after the application of the transfer element 19, at least partially outside the edge 22 of the transfer element 19 posi tioned.
- the patterns 30 of the stabilization coating 17 and the adhesion promoter coating 18 are each arranged on both sides 20, 21 of the transfer element.
- the patterns 30 are shown as cutouts in the figures.
- a pattern can also actually be designed as a geometric, character-like or motif-like recess in the coating in question (negative representation of the geometric shape or motif).
- the pattern 30 of the stabilization coating 17 and the adhesion promoter coating 18 can also be designed differently (in particular as a positive representation of a geometric shape, a character or a character string, with letter(s), number(s) and/or symbol(s), or a motif).
- the pattern can also be a local (sinusoidal, triangular or rectangular) modulation (+/- 1mm) of the width of the coating along the strip in plan view.
- the pattern 30 of the stabilization coating 17 and the pattern 30 of the adhesion promoter coating 18 are at least partially arranged in register with one another, ie in particular in the direction in which the substrate 12 extends in the figure and preferably also perpendicular thereto.
- the patterns 30 on the front side 14 and on the back side 15 are arranged identically and completely matched to one another, that is to say both are congruent overall when viewed from above.
- the security element 10 provided in section 16 has a symmetrical structure. Both coatings 17, 18 extend beyond the transfer element 19 on both sides 21, 22 and each extend with the same width on both sides.
- the patterns 30 arranged on the front and back 14, 15 are congruent.
- the substrate 12 is transparent or translucent for UV light, in particular just as translucent as for visible light. In the UV light, the viewer sees an outer blue, here 1.5 mm wide, emitting section and an inner red-blue (mixed color: magenta) emitting section, here 2 mm wide, on both sides next to the transfer element 19.
- the Pattern 30 is designed as a recess in this example, ie it can be seen as a non-emitting recess in the inner red-blue section. If, on the other hand, the pattern 30 is a modulation, for example a sinusoidal one, of a coating edge, then the pattern can be recognized in plan view as a modulation of the local width of the section (or both sections).
- the optical effect of the security feature is so far independent of the viewing situation.
- the optical effect of the security feature can be seen both from the front 14 and from the back 15 and both in reflected light (illumination from the viewing side) and in transmitted light (illumination from the side opposite the viewing side).
- the sections and patterns 30 of the stabilization coating 17 and the adhesion promoter coating 18 arranged outside the edge 22 of the transfer element 19 are particularly relevant for the appearance of the security element 10 .
- an opaque area of the transfer element 19 there is no emission from the front in incident light (due to the lack of UV excitation).
- the mixed color can also be seen in the opaque area from the back in UV reflected light.
- transmitted UV light no emission is visible when viewed from the back (due to lack of excitation) and when viewed from the front (due to lack of transmission).
- Transparent areas of the transfer element 19 may preferably extend from edge to edge or be surrounded by an opaque area.
- a transparent area following the edge of the transfer element 19 is preferably provided, which in particular surrounds a central opaque and/or translucent area.
- the substrate 12 absorbs UV light or is significantly less translucent than for visible light, for example because it contains a UV absorber.
- incident UV light the viewer sees the red emission (and/or pattern 30) of adhesion promoter coating 18 from front side 14 and the blue emission (and/or pattern 30) of stabilization coating 17 from the back.
- transmitted UV light the viewer sees the blue emission of the stabilization coating 17 from the front and the red emission of the adhesion promoter coating 18 from the rear.
- the red luminous section next to the transfer element 19 is 2 mm wide, the blue luminous section is 3.5 mm wide.
- the sections are designed in the form of strips in plan view, with the pattern 30 as a non-luminous recess.
- Correspondingly luminous sections can be visible in transparent areas of the transfer element 19 . Opaque areas of the transfer element 19 remain dark/not luminous both in UV transmitted light and from the front in UV incident light.
- the two coatings with their fluorescent substances form an attractive optical security feature that the viewer can check.
- the security can thus - be increased - in particular without additional production costs.
- the present example was and further examples will be described with two fluorescent substances as feature components. All examples are however, it can also be used conceptually with other optical feature components, such as two other luminescent substances, two optically variable colorants, one optically variable and one optically invariable colorant or two (invariable) colorants, or with machine-readable feature components, such as IR absorbers, phosphorescent substances or magnetic substances.
- optical feature components such as two other luminescent substances, two optically variable colorants, one optically variable and one optically invariable colorant or two (invariable) colorants, or with machine-readable feature components, such as IR absorbers, phosphorescent substances or magnetic substances.
- a comparable translucency can be present in the sense of the first variant in the entire (UV range as) excitation range and in the entire (VIS range as) emission range or only selectively in an excitation band and, for example, the two emission bands.
- the comparable translucency can be, for example, in the range from 10 to 80% transmission, that is to say for example 80%, 60% or 40% transmission for all areas/bands.
- FIG. 2 shows a schematic of an exemplary security element 100 which is designed as a variant of the security element 10 .
- the adhesion promoter coating 18 extends on both sides 20, 21 of the transfer element 19 by a total of 2 mm beyond its edge 22. In contrast to the security element 10 from FIG. 1, however, the adhesion promoter coating 18 contains the pattern 30 only in the part extending beyond the side 20.
- the stabilizing coating 17 extends on the side 21 of the transfer element beyond its edge 22 by a total of 6 mm and contains its pattern 30 only in the part extending beyond side 21. On the other side 20, the stabilizing coating 17 does not extend beyond the edge 22 (or alternatively, if necessary, exactly up to the edge 22 or, for example, 1 mm beyond the edge 22 ).
- the patterns 30 are now provided on different sides of the transfer element 19 and on different sides of the substrate 12 .
- the two patterns 30 could also be designed differently.
- the two coatings with their fluorescent substances form an optical security feature that is even more recognizable and therefore verifiable. Safety can thus be increased in particular without additional production costs.
- the security feature shows three different colors (first color, second color and mixed color).
- the substrate 12 is in turn transparent or translucent to UV light.
- UV light the viewer sees an outer blue section (4mm wide) on side 21 of rim 22 as well as an inner one red-blue (magenta) section (2 mm wide).
- an inner red-blue (magenta) section could optionally be present. In variants, however, this can also be avoided.
- the stabilizing coating 17 can be applied in such a way that it does not extend beyond the edge 22 on the side 20 , ie it ends in front of the edge 22 or ends at the edge 22 . Only a red section can then be seen to the left of the transfer element 19 (on the side 20).
- the substrate 12 is again absorbent for UV light, the visible luminescence changes less in comparison to the embodiment according to FIG.
- the viewer sees the red luminescent coating 17 as a strip with the pattern 30, for example as an internal recess or as edge modulation.
- the viewer sees the blue luminescent adhesion promoter coating 18 as a strip with its possibly different pattern 30.
- the aspects of the dependency on opaque and/or transparent areas of the transfer element and on the viewing situation that have already been discussed apply analogously and are therefore discussed here and below not repeated again.
- the same luminescence colors are always used in the same coating for the sake of simplicity; the color and the associated coating can of course be freely selected.
- FIG. 3 schematically illustrates an exemplary security element 200 that is produced as a variant of the security element 100 .
- the security selement 200 is also constructed asymmetrically in section 16. In comparison to the security element 100, it is primarily formed in the wrong direction.
- the adhesion promoter coating 18 contains its second pattern 30 only on the side 21 of the transfer element 19 beyond its edge 22.
- the stabilizing coating 17 contains its first pattern 30 only on the side 20 in this way an asymmetrical arrangement of the coatings 17, 18 is realized.
- the coatings 17, 18 also extend differently beyond the edge—the reverse of FIG.
- the patterns 30 are in turn provided on different sides of the transfer element 19 and on different sides of the substrate 12 .
- the pattern 30 in the adhesion promoter coating 18 can consist of a large number of similar (or different) pattern elements, such as numbers, numerals or symbols.
- the pattern elements are arranged next to one another in plan view, for example following the edge 22 .
- the pattern 30 of a coating here the adhesion promoter coating 18, can be configured as a strip-shaped cutout, for example, so that it is flush with an edge of the other coating, ending here with the right-hand edge of the stabilization coating 17 congruently.
- the non-luminescent recess thus borders on two different ones colored/luminescent sections (on the right luminescent in blue, on the left luminescent in mixed color).
- one of the coatings could be present with its width modulated on one side or on both sides.
- the stabilization coating 17 on the left side 20 of the edge 22 of the transfer element 19 could have a sinusoidally modulated edge as a pattern 30, for example.
- the amplitude of the modulation preferably corresponds to half or the entire width of the section of the stabilization coating 17 which extends beyond an edge of the adhesion promoter coating 18 or beyond the edge of the transfer element.
- the width of the red luminescent section changes along the edge 22 of the transfer element 19 .
- FIG. 4 schematically shows an exemplary security element 300 obtainable with the method of embodiments.
- the adhesion promoter coating 18 and the stabilization coating 17 each on both sides 21, 22 of the transfer element 19 extend further beyond its edge 22, the adhesion promoter coating 18 as a whole by 3.5 mm, the stabilization coating by 8 mm overall.
- the stabilization coating 17 therefore extends on the side 21 of the transfer element 19 by 4.5 mm beyond the adhesion promoter coating 18 .
- the adhesion promoter coating 18 and the stabilization coating 17 each contain different or differently arranged patterns 30 in the part extending out on both sides 20, 21 Way also creates an asymmetrical arrangement.
- the patterns 30 are in turn provided on both sides of the transfer element 19 and on different sides of the substrate 12 .
- the two patterns 30 provided on the side 20 of the transfer element 19 are arranged in register with one another, but do not have to be identical.
- the two patterns 30 provided on the side 21 of the transfer element 19 are completely (or partially) arranged without overlapping. Patterns arranged without overlapping can also be identical or different.
- the patterns 30 are considered below as gaps or as patterns that form gaps; further alternatives have already been named.
- the pattern 30 of the two coatings 17, 18 complement each other to form an overall motif.
- the pattern 30 of the two coatings 17, 18 are arranged without overlapping. Both patterns are visible and can complement each other to form an overall motif.
- a rectangular recess 30 in the adhesion promoter ler Anlagen 18 and a circle as a pattern 30 of the stabilization coating 17 complement each other to form a red glowing letter "i".
- FIG. 5 schematically shows another exemplary security element 400 obtainable with the method of embodiments.
- the adhesion promoter coating 18 and the stabilization coating 17 each on the side 21 of the transfer element 19 extend further beyond its edge 22, the adhesion promoter coating 18 by a total of 9 mm, the stabilization coating by a total of 6 mm.
- the adhesion promoter coating 18 therefore extends—with a section of width 3 mm—laterally from the side 21 beyond the stabilization coating 17.
- the coatings extend less far beyond its edge 22, for example 2.5 and 1 mm.
- the adhesion promoter coating 18 and the stabilization coating 17 each contain patterns 30 in the part extending out on both sides 20, 21 of the transfer element.
- the patterns 30 are provided on both sides of the transfer element 19 and on under different sides of the substrate 12 .
- the patterns 30 provided laterally from the side 20 of the transfer element 19 and on the front and rear sides 14, 15 of the substrate 12 are arranged in register.
- a pattern along the edge, repeated or locally different, in the width of the two sections is used. Be preferably repeated the change in width of the sections such that along the edge 22, the color regularly between two or three of changes colors (e.g. red/blue/red... or red/magenta/blue/magenta/red).
- FIG. 6 schematically shows another exemplary security element 500 obtainable with the method of embodiments.
- the coatings in this example are arranged almost symmetrically to one another.
- the coatings 17, 18 (and/or the patterns 30) are both arranged asymmetrically with respect to the transfer element 19 or its edge 22.
- the substrate 12 is preferably a paper substrate.
- Paper substrate is translucent for visible light and can be made absorbing for UV light.
- the transmissivity of the substrate can be varied locally, for example with a local variation in the thickness of the substrate, such that the viewer recognizes a motif in transmitted light (watermark).
- patterns 30 in one or both of the coatings may be replaced by a substrate pattern, or a substrate pattern may be provided in addition.
- the two patterns 30 on the side 21 of the edge 22 of the transfer element 19 can be replaced by a substrate pattern.
- the local variation in the transmissivity/translucency of the substrate can locally influence UV excitation through the substrate and/or visibility of the luminescence through the substrate.
- a watermark in the paper substrate is visible in transmitted UV light as a pattern 30 recognizable in the color (hue of the mixed color varies locally) and the brightness of the fluorescence (intensity of the light varies locally).
- the transfer element 19 can be a transfer strip or a transfer patch.
- a transfer patch for example in the form of an oval
- the edge 22 of the transfer element 19 runs once around the transfer element.
- Each of the coatings 17, 18 can be arranged with its own motif shape, such as rectangle or apple, and/or - as shown in the figure - arranged asymmetrically at least in the direction of the cross-section shown.
- the coatings 17, 18 could therefore be designed with a larger area--for example both also as ovals--but be shifted in plan view in (the same or) different directions with respect to the oval of the transfer element.
- FIG. 7 schematically illustrates an exemplary security element 600 obtainable with the method of embodiments.
- the arrangement of the coatings 17 , 18 is in turn designed asymmetrically, reaching beyond the edge 22 of the transfer element 19 .
- the stabilization coating 17 contains an additional pattern 31 within the edge 22, here arranged centrally to the transfer element 19.
- the pattern 31 is shown as a recess.
- Both coatings 17, 18 can have such patterns, which can be either completely inside the rim 22 or both inside the rim 22 and outside the rim 22 (the pattern extends beyond the rim).
- DE 102019005551 describes examples of such patterns, at least also on the inside, in more detail, in particular with regard to FIGS. 4 to 6 there, which can be used as patterns in the present sense in one or both coatings.
- the coatings 17, 18 in FIG. 7 can have a dye as the feature component or as an additional feature component.
- the luminescent feature components of the coatings 17, 18, such as the red and blue fluorescent feature substances, could also be visible in the visual range.
- the stabilization coating 17 is visible in red and the adhesion promoter coating 18 is blue and luminescent in the visual range.
- the colors are of course - here as in every other figure - freely selectable.
- yellow and blue with a corresponding (green) mixed color
- VIS incident light ie incident light with visible light
- the observer in FIG. 7 sees the coating 18 with the patterns 30, 31 from the back 15 and the coating 17 with the pattern 30 from the front 14.
- the sides are the side 21 of the transfer element 19 and on the front and back sides 14, 15 the substrate provided pattern 30 arranged in register and identical table.
- the pattern 30 of the front and the back 14, 15 are recognizable in the section on the side 21 of the Trans ferelements 19.
- the patterns 30 are discernible in a mixed tone (purple) when formed by the coatings 17, 18, or are discernible as colorless in a portion with a mixed tone (purple) when formed by recesses.
- the coatings 17, 18 provide the viewer with an easily verifiable see-through security feature.
- machine-readable feature components such as IR absorbers (measurement usually in IR transmitted light) or phosphorescent substances (measurement in reflected or transmitted light), in the selectively arranged coatings 17, 18 form a security feature that is only machine-readable.
- the adhesion promoter coating 18 may include a first magnetic feature component and the stabilizer coating 17 may include the same or a stronger (more magnetic) second magnetic feature component.
- a magnetic security feature in particular a machine-readable magnetic coding, is produced.
- a magnetic security feature for example (on one or both of the sides 20, 21) in plan view along the edge 22 of the transfer element 19 coding can be done by one or both of the coatings 17, 18 alternately extending beyond the edge and not extending beyond.
- such a magnetic coding could be formed only within half or only outside of the edge. If FIG.
- FIG. 7 shows, for example, the cross section through a point with a recess 31, when viewed from above, the point with a recess can be followed by a point without a recess. If positions with and without gaps alternate, a magnetic coding is produced which, in a plan view in FIG. 7, runs along the edge 22 or in the plane of the drawing. If gaps have a magnetic strength of 0, the stabilizing layer has a magnetic strength of 4 and the adhesion promoter layer has a magnetic strength of 1, four different magnetic strengths (0+0, 0+1, 4+0 and 4+1) or two can be used locally
- a coding by the local magnet strength and/or by the size of the sections (with the same strength) can be done.
- a coding can then, for example, be appropriately arranged pattern, for example with the magnet strength sequence 4, 0,
- a security element 600 is shown schematically in incident light in FIG. 8a and in transmitted light in FIG. 8b.
- the adhesion promoter coating 18 and the stabilizing coating 17 contain, as before, two differently fluorescent dyes.
- the security element 600 is irradiated on its front side 14 with UV light 50 (ultraviolet light) in incident light and the fluorescence 60 is seen by the observer of the front side.
- the transfer element 19 can be opaque, for example. Then the viewer sees a magenta glowing section on both sides next to the edge of the transfer element 19 . On the right side the section is wider than on the left side and also has the pattern 30 on it. On the left, the magenta glowing section is followed by a red glowing section. Only with UV excitation and observation from the rear does the observer also see the pattern 31, in the example as a blue-glowing section between the magenta-glowing sections, which extend beyond the edge of the transfer element.
- the security element 600 is irradiated on its rear side 15 with UV light 50 and if the fluorescence 60 is viewed from the front side 14, the result (with a transparent substrate 12) is the same for the viewer as in reflected light.
- the occurrence or the visibility of the fluorescence can be controlled by means of appropriate absorbers (UV absorbers or VIS absorbers)—in particular in the substrate 12 or the coatings.
- a security element 600 which can be designed according to FIG. 7, is shown schematically. A strip is applied as the transfer element 19 in section 16 of the substrate 12 .
- 9b shows the front side 14 of the security element 600.
- a security strip is applied as the transfer element 19 to the adhesion promoter coating 18.
- the adhesion promoter coating 18 extends asymmetrically--at least with its pattern 30--over the transfer element 19, here for example only or more on the right side. It includes a fluorescent feature component.
- the pattern 30 is a repeating sequence of digits "200". It includes the digits or the sequence of digits as pattern elements. The pattern elements can be connected to one another and/or to the strip-shaped section or - as shown - be separated by a recess.
- the applied Adhesive coating 18 forms the pattern 30.
- the adhesive layer 18 with its strip-shaped section which preferably already extends beyond the edge of the transfer element on at least one side and with the repeating sequence of digits.
- the illustration assumes a transparent transfer element.
- the transfer element usually includes opaque and/or UV-absorbing and / or optically variable areas.
- FIG. 9c shows the rear side 15 of the security element 600.
- the stabilization coating 17 is applied to the rear side 15 in strip form.
- a pattern 30, as before is formed as a sequence of pattern elements, and a pattern 31 through a recess in the stabilizer lisation coating 17 formed.
- the pattern 31 is designed as a geometric shape.
- Stabilization coating 17 includes the same fluorescent feature component (eg, green) as the primer coating, or a different fluorescent feature component (eg, red and blue). If the stabilization coating 17 is visible to the viewer (optional), he sees a strip with a recess and a repeating sequence of numbers on only one side.
- the 9a shows the security element 600 in UV light when viewed from the front 14.
- Both coatings 17, 18 fluoresce due to the UV light (UV incident light or UV transmitted light).
- the patterns 30, 31 are recognizable to the observer .
- the patterns 30 lying on different sides of the substrate complement each other to form an overall motif.
- the patterns 30 are arranged in a non-overlapping manner in plan view.
- the pattern 31 can be seen as a darker, because less brightly lit, geometric shape in the brightly lit strip.
- the pattern 30 can be seen alternating with the corresponding color (blue 200, red mirrored 200, ).
- the strips of the two coatings 17, 18, which overlap—for example completely—light up in a mixed color (red+blue >magenta).
- the pattern 31 can then be recognized, for example, as a geometric shape that lights up in blue in the magenta-colored strip.
- the transfer element 19 should therefore actually be transparent for the example from FIG. 9c, at least in the area of the pattern 31, ie in the middle third.
- Non-transparent areas, in particular in the upper and/or lower third of the transfer element 19, could—as already described above, depending on the viewing situation—prevent the excitation of the fluorescence and/or the visibility of the fluorescence.
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| Application Number | Priority Date | Filing Date | Title |
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| DE102021002416.8A DE102021002416A1 (de) | 2021-05-06 | 2021-05-06 | Verfahren zum Herstellen eines Sicherheitselements und Sicherheitselement |
| PCT/EP2022/025112 WO2022233449A1 (de) | 2021-05-06 | 2022-03-21 | Verfahren zum herstellen eines sicherheitselements und sicherheitselement |
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| EP (1) | EP4334138B1 (de) |
| DE (1) | DE102021002416A1 (de) |
| ES (1) | ES3050892T3 (de) |
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| DE59104959D1 (de) | 1990-12-12 | 1995-04-20 | Sihl Zuercher Papierfabrik An | Sicherheitspapier für Banknoten oder dergl. und Verfahren zu seiner Herstellung. |
| CH701535A1 (de) | 2009-07-17 | 2011-01-31 | Landqart | Vorrichtung zum auftragen von farbeffektpigmenten. |
| DE102009036314A1 (de) | 2009-08-06 | 2011-02-10 | Giesecke & Devrient Gmbh | Verfahren zur Herstellung eines Sicherheitselements und nach dem Verfahren erhältliches Sicherheitselement |
| DE102012024768A1 (de) | 2012-12-18 | 2014-04-03 | Giesecke & Devrient Gmbh | Substratbogen für die Herstellung von Sicherheits- und Wertdokumenten |
| DE102012014294A1 (de) | 2012-07-19 | 2014-01-23 | Giesecke & Devrient Gmbh | Verfahren zur Herstellung eines mehrschichtigen Sicherheitselements |
| DE102019005551A1 (de) | 2019-08-07 | 2021-02-11 | Giesecke+Devrient Currency Technology Gmbh | Herstellverfahren für ein Sicherheitspapier und damit erhältliches Sicherheitspapier |
| DE102019006890A1 (de) | 2019-10-02 | 2021-04-08 | Giesecke+Devrient Currency Technology Gmbh | Herstellverfahren für ein Sicherheitspapier und damit erhältliches Sicherheitspapier |
-
2021
- 2021-05-06 DE DE102021002416.8A patent/DE102021002416A1/de not_active Withdrawn
-
2022
- 2022-03-21 PL PL22717729.2T patent/PL4334138T3/pl unknown
- 2022-03-21 EP EP22717729.2A patent/EP4334138B1/de active Active
- 2022-03-21 WO PCT/EP2022/025112 patent/WO2022233449A1/de not_active Ceased
- 2022-03-21 ES ES22717729T patent/ES3050892T3/es active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP4334138B1 (de) | 2025-10-01 |
| DE102021002416A1 (de) | 2022-11-10 |
| WO2022233449A1 (de) | 2022-11-10 |
| ES3050892T3 (en) | 2025-12-23 |
| PL4334138T3 (pl) | 2026-01-26 |
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