DE102018003030A1 - Security element, method for producing the same and equipped with the security element disk - Google Patents

Abstract

The invention relates to a security element for securing documents of value with a carrier, a layer structure arranged on the carrier via an embossing lacquer layer and an adhesive layer suitable for bonding the security element to a valuable article, wherein the layer structure comprises opaque, metallic regions, semitransparent regions which are suitable for a viewer the viewing in reflected light and when viewed in transmitted light give a different color impression, and having transparent areas, wherein (i) both the transparent areas and the opaque, metallic areas are each in the form of patterns, characters or a coding and the semitransparent Regions represent a background, or (ii) both the transparent areas and the semi-transparent areas are each formed in the form of patterns, characters or a coding and the opaque, metallic areas represent a background.

Description

The invention relates to a security element for securing value documents with a carrier, a layer structure arranged on the carrier via an embossing lacquer layer and an adhesive layer suitable for bonding the security element to a valuable article, wherein the layer structure comprises opaque, metallic regions, semitransparent regions which aid a viewer the viewing in reflected light and viewing in transmitted light give a different color impression, and has transparent areas. The invention further relates to methods for producing such a security element and a data carrier with such a security element.

Data carriers, such as valuables or identity documents, or other valuables, such as branded articles, are often provided with security elements for the purpose of security, which permit verification of the authenticity of the data carriers and at the same time serve as protection against unauthorized reproduction. Security elements with viewing-angle-dependent effects play a special role in the authentication of authenticity since they can not be reproduced even with the most modern copiers. The security elements are thereby equipped with optically variable elements that give the viewer a different image impression under different viewing angles and, for example, show a different color or brightness impression and / or another graphic motif depending on the viewing angle.

In this context, it is known to use security elements with multilayer thin-film elements whose color impression changes with the viewing angle for the viewer (referred to below as the color-shift effect). The color shift effect in such thin-film elements is based on viewing angle-dependent interference effects due to multiple reflections in the different sub-layers of the element. The path difference of the light reflected at the different layers depends on the one hand on the optical thickness of a dielectric spacer layer, which determines the distance between a semi-transparent absorber layer and a reflective layer, and on the other hand varies with the respective viewing angle. Since the path difference is on the order of the wavelength of the visible light, the result is an angle-dependent color impression for the viewer due to the extinction and amplification of certain wavelengths. By a suitable choice of material and thickness of the dielectric spacer layer a variety of different color shift effects can be designed.

In addition, (see-through) security elements with multilayer thin-film elements are known which, when viewed in incident light, ie in reflection, appear in a first color and, when viewed in transmitted light, ie in transmission, appear in a second color. The WO 2011/082761 A1 describes a thin-film element with a multilayer structure, which appears gold-colored when viewed in reflected light and blue when viewed in transmitted light. The multilayer structure is based on two semitransparent mirror layers and a dielectric spacer layer arranged between the two mirror layers.

Proceeding from this, the object of the invention is to provide a security element of the type mentioned above with high security against forgery and an attractive visual appearance.

This object is solved by the features of the independent claims. Further developments of the invention are the subject of the dependent claims.

Summary of the invention

1. 1. (First aspect of the invention) security element for securing value documents with a carrier, a layer structure arranged on the carrier via an embossing lacquer layer and an adhesive layer suitable for bonding the security element to a valuable article, the layer structure comprising opaque, metallic regions, semitransparent regions, which impart a different color impression to a viewer when viewed in reflected light and when viewed in transmitted light, and has transparent areas, wherein both the transparent areas and the opaque, metallic areas are each in the form of patterns, characters or an encoding and the semitransparent areas constitute a background.
2. 2. (Second aspect of the invention) security element for securing value documents with a carrier, a layer structure arranged on the carrier via an embossing lacquer layer and an adhesive layer suitable for bonding the security element to a valuable article, the layer structure comprising opaque, metallic regions, semitransparent regions, which convey a different color impression to a viewer when viewed in reflected light and when viewed in transmitted light, and has transparent areas, where both the transparent areas and the semi-transparent areas are each in the form of patterns, characters or an encoding and which are opaque, metallic areas represent a background.
3. 3. (Preferred embodiment) Security element according to one of clauses 1 or 2, wherein the opaque, metallic regions are based on a metallization obtainable, for example, by vapor deposition, in particular an Al or Ag metallization, or can be obtained by printing technology and are based on platelet-shaped metal pigments.
4. 4. (Preferred embodiment) Security element according to one of the clauses 1 to 3, wherein the semi-transparent areas, which give a viewer a different color impression when viewed in incident light and when viewed in transmitted light, on a two semitransparent mirror layers and one between the two mirror layers are arranged, the thin-film element is in particular an Al / SiO ₂ / Al or Ag / SiO ₂ / Ag thin-film element.
5. 5. (Preferred embodiment) Security element according to one of the clauses 1 to 3, wherein the semi-transparent areas, which give a viewer a different color impression when viewed in incident light and when viewed in transmitted light, are available by means of an effect pigment composition.
6. 6. (Preferred Embodiment) A security element according to one of the clauses 1 to 5, wherein the embossing lacquer layer is provided with an embossed relief structure and the relief structure is in particular a diffractive structure, such as a hologram, a holographic grating image or a hologram-like diffraction structure, or an achromatic structure, such as a matte structure, or a micromirror array or blazed grating with a saw-toothed ridge profile, or a Fresnel lens array, or a combination of two or more of the aforementioned elements.
7. 7. (Preferred embodiment) A security element according to one of the clauses 1 to 6, wherein the embossing lacquer layer has an embossed relief structure in the respective regions in the form of patterns, characters or a coding, namely the transparent regions on the one hand and the opaque, metallic regions on the other hand or the transparent regions on the one hand and the semitransparent regions on the other hand, is formed with two different relief structures, in particular such that the one relief structure forms a diffractive structure and the second relief structure forms a micromirror arrangement.
8. 8. (Preferred embodiment) Security element according to clause 7, wherein the embossing lacquer layer with a stamped relief structure has a third relief structure in the areas representing a background.
9. 9. (Preferred embodiment) Security element according to one of the clauses 1 to 6, wherein the embossing lacquer layer with an embossed relief structure has the same relief structure in the areas formed in each case in the form of patterns, characters or a coding and in the areas representing a background a further relief structure in particular such that the one relief structure forms a diffractive structure and the second relief structure forms a micromirror arrangement.
10. 10. (Preferred embodiment) Security element according to one of the clauses 1 to 9, wherein the areas formed in each case in the form of patterns, characters or a coding are arranged at least partially register-accurate to one another.
11. 11. (Preferred embodiment) Security element according to one of the clauses 1 to 10, wherein (i) the color impression of the semi-transparent regions when viewed in reflected light is identical to the color impression of the opaque, metallic regions and the color impression of the semitransparent regions when viewed in transmitted light is different from the color impression of the opaque, metallic areas, or (ii) both the color impression of the semitransparent areas when viewed in incident light, and the color impression of the semitransparent areas when viewed in transmitted light from the color impression of the opaque, metallic areas is different.
12. 12. (Preferred embodiment) A security element according to one of the clauses 1 to 11, wherein the embossed lacquer embossed relief structure has the transparent areas, the metallic, opaque areas and the semi-transparent areas in three separate sub-areas.
13. 13. (Preferred embodiment) A security element according to any one of clauses 1 to 11, wherein the relief structure embossed in the embossing lacquer layer comprises the transparent regions and the semi-transparent regions in two separate subregions and a part of the semi-transparent regions is additionally coated with e.g. provided by vapor deposition metallized or is printed with platelet-shaped metal pigments, to form in this way the metallic, opaque areas.
14. 14. (Preferred embodiment) Security element according to one of the clauses 1 to 13, wherein the Layer order of the security element is the following:
    1. a) carrier;
    2. b) embossing lacquer layer with embossed relief structure;
    3. c) layer structure, the opaque, metallic areas, semitransparent areas, which give a viewer a different color impression when viewed in reflected light and when viewed in transmitted light, and has transparent areas;
    4. d) for the bonding of the security element with a valuable item suitable adhesive layer.
15. 15. (Preferred embodiment) Security element according to one of the clauses 1 to 13, wherein the layer sequence of the security element is the following:
    1. a) for the bonding of the security element with a valuable item suitable adhesive layer;
    2. b) carrier;
    3. c) embossing lacquer layer with embossed relief structure;
    4. d) layer structure, the opaque, metallic areas, semi-transparent areas, which give a viewer a different color impression when viewed in reflected light and when viewed in transmitted light, and has transparent areas;
    5. e) protective layer, in particular protective layer based on a protective lacquer.
16. 16. (Preferred Embodiment) A security element according to any one of clauses 1 to 15, wherein the security element is a security tape, a security strip, a patch or a label for application to a security paper, value document or the like.
17. 17. (Third aspect of the invention) Data carrier with a security element according to one of the clauses 1 to 16.
18. 18. (Preferred Embodiment) Data carrier according to clause 17, wherein the security element is arranged in a transparent window region of the data carrier.
19. 19. (Preferred embodiment) Data carrier according to clause 17 or 18, wherein the data carrier is a value document, such as a banknote, in particular a paper banknote, polymer banknote or composite film banknote, or identity card.
20. 20. (Fourth aspect of the invention) Method for producing a security element for securing value documents in particular a security element according to one of the clauses 1 to 16, with a carrier, a layer structure arranged on the carrier via an embossing lacquer layer and an adhesive layer suitable for bonding the security element to a valuable article, the layer structure comprising opaque, metallic regions, semitransparent regions, the one Viewers when viewing in reflected light and when viewing in transmitted light to convey a different color impression, and has transparent areas, the method comprising the following steps:
    • the step of providing a carrier substrate having an embossing lacquer layer applied thereto;
    • the step of printing a soluble wash ink in the areas outside the metallic, opaque areas to be created;
    • the step of applying a metallization, eg a reflective Al, Cr, Cu or Au layer, in particular by means of vapor deposition, an Al layer being preferred;
    • the step of washing off the soluble wash paint together with the above the wash paint metallization by means of a solvent, so that metallic, opaque areas remain on the embossing lacquer layer;
    • the step of printing a soluble wash ink in the areas outside the semitransparent areas to be created;
    • the step of producing a multilayer structure comprising two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers, in particular by means of vapor deposition;
    • the step of washing off the soluble wash paint together with the multi-layered structure above the wash color so that, in addition to the metallic, opaque areas, semi-transparent areas remain on the embossing lacquer layer and transparent areas are formed between the metallic, opaque areas and the semi-transparent areas;
    • optionally the step of applying an optional primer layer; and
    • optionally the step of applying an adhesive layer, eg a heat-sealing lacquer layer.
21. 21. (Fifth Aspect of the Invention) A method for producing a security element for securing value documents, in particular a security element according to one of the clauses 1 to 16, comprising a carrier, a layer structure arranged on the carrier via an embossing lacquer layer and one for gluing the security element an adhesive layer which is suitable for a valuable article, the layer structure comprising opaque, metallic regions, semitransparent regions which give a viewer a different color impression when viewed in reflected light and when viewed in transmitted light, and transparent regions, comprising the following steps:
    • the step of providing a carrier substrate having an embossing lacquer layer applied thereto;
    • the step of producing metallic, opaque areas on the embossing lacquer layer by means of a printing ink based on platelet-shaped metal pigments;
    • the step of printing a soluble wash ink in the areas outside the semitransparent areas to be created;
    • the step of producing a multilayer structure comprising two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers, in particular by means of vapor deposition;
    • the step of washing off the soluble wash paint together with the multi-layered structure above the wash color so that, in addition to the metallic, opaque areas, semitransparent areas remain on the embossing lacquer layer and transparent areas are formed between the metallic, opaque areas and the semi-transparent areas;
    • optionally the step of applying an optional primer layer; and
    • optionally the step of applying an adhesive layer, eg a heat-sealing lacquer layer.
22. 22. (Sixth aspect of the invention) A method for producing a security element for securing value documents, in particular a security element according to one of the clauses 1 to 16, comprising a carrier, a layer structure arranged on the carrier via an embossing lacquer layer, and one for gluing the security element an adhesive layer suitable for a valuable article, the layer structure comprising opaque, metallic regions, semitransparent regions which give a viewer a different color impression when viewed in reflected light and when viewed in transmitted light, and transparent regions, comprising the following steps:
    • the step of providing a carrier substrate having an embossing lacquer layer applied thereto;
    • the step of printing a soluble wash ink in the areas outside semi-transparent areas to be produced;
    • the step of producing a multilayer structure comprising two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers, in particular by means of vapor deposition;
    • the step of washing off the soluble wash paint together with the multi-layered structure located above the wash color so that semitransparent areas remain on the embossing lacquer layer;
    • the step of printing a soluble wash ink in the areas of metallic, opaque areas to be generated outside;
    • the step of applying a metallization, eg a reflective Al, Cr, Cu or Au layer, by means of vapor deposition, wherein an Al layer is preferred, the step being such that a part of the semi-transparent regions additionally with a provided by vapor deposition metallization, so as to form the metallic, opaque areas;
    • the step of washing off the soluble wash paint together with the metallization above the wash color;
    • optionally the step of applying an optional primer layer; and
    • optionally the step of applying an adhesive layer, eg a heat-sealing lacquer layer.

Detailed description of the invention

For the purposes of this invention, an observation in incident light is an illumination of the data carrier from one side and a viewing of the data carrier from the same side. A reflection in incident light is thus present, for example, when the front of the data carrier is illuminated and also viewed.

A viewing in transmitted light is in the sense of this invention an illumination of a data carrier from one side and a viewing of the data carrier from another side, in particular the opposite side. A reflection in transmitted light is thus, for example, when the back of the disk illuminated and the Front of the disk is considered. The light thus shines through the data carrier.

The data carrier substrate of the data carrier, e.g. A value document substrate, such as a banknote substrate, is particularly a paper substrate or a paper-like substrate, a polymer substrate, a paper / film / paper composite substrate, or a film / paper / film composite substrate. A security document provided with a window portion may be used in the case of a paper substrate, a paper / foil / paper composite substrate, or a film / paper / foil composite substrate, e.g. be produced by means of a continuous recess within the paper layer (s). Alternatively, the paper layer may be coated by means of a suitable liquid, e.g. be made transparent by means of aqueous sulfuric acid solution in a certain range. In the case of a value document based on a transparent polymer substrate, a window area may e.g. be created by means of congruent recesses in the applied on the front and back of the polymer substrate opaque print layers.

According to the invention, in a generic security element, a carrier, i. a carrier substrate such as a film to be provided with an embossing lacquer layer with embossed relief structure and a layer structure, the opaque, metallic areas, semitransparent areas that give a viewer a different color impression when viewed in incident light and when viewed in transmitted light, and has transparent areas ,

The opaque, metallic regions are formed, in particular, by means of a metallization or reflection layer obtainable, for example, by vapor deposition, preferably by means of an aluminum layer. In principle, however, other metals such as silver, nickel, copper, iron, chromium or gold come into consideration for the metallization. Alternatively, the opaque, metallic regions can be formed by a printing technology-available reflection layer. To produce the reflective layer suitable platelet-shaped metal pigments are known from WO 2013/186167 A2 . WO 2010/069823 A1 . WO 2005/051675 A2 (See, for example, the description on page 11, line 10, to page 12, penultimate paragraph) and WO 2011/064162 A2 known. The platelet-shaped metal pigments described therein have the advantage that they conform to a substrate having a relief structure, in particular a relief with microstructures and / or nanostructures, so well that the difference to a conventional metallization obtainable by vapor deposition is almost no longer recognizable. The simple, printing-technical production of the reflection layer makes it possible to dispense with complex process steps, such as printing the carrier with a soluble wash in the form of a desired recess within the reflection layer to be produced, generating a metallization by vapor deposition and washing the washing paint together with the above the washing paint applied metallization.

The layer structure of the security element according to the invention according to a first variant has opaque, metallic areas, semi-transparent areas, which give a viewer a different color impression when viewed in reflected light and when viewed in transmitted light, and transparent areas, wherein both the transparent areas and the opaque, metallic areas are each formed in the form of patterns, characters or an encoding and the semitransparent areas represent a background. The layer structure of the security element according to the invention according to a second variant has opaque, metallic areas, semi-transparent areas, which give a viewer a different color impression when viewed in reflected light and when viewed in transmitted light, and transparent areas, wherein both the transparent areas and the semitransparent areas are each formed in the form of patterns, characters or a coding and the opaque, metallic areas represent a background. Both variants are based on the general idea of providing a security element in which two separate regions are each formed in the form of patterns, characters or a code, wherein a region formed in the form of patterns, characters or a code, depending on the viewing in reflected light or in the Transmitted light has a different color impression. According to a preferred embodiment, the one area formed in the form of patterns, characters or a coding is initially imperceptible when viewed in incident light, but only when viewed in transmitted light. In this case, in particular, the color of the semi-transparent regions when viewed in reflected light is identical to the color of the opaque, metallic regions. A hidden information in the incident light, which is only visible when viewed in transmitted light, increases the interest of the observer and increases the security against counterfeiting of the respective object of value.

The semitransparent areas, which give a viewer a different color impression when viewed in incident light and when viewed in transmitted light, are based in particular on a multilayer structure with two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers. Such a multilayer structure, which in the Viewing in incident light appears golden and when viewed in transmitted light shows a blue hue is, for example, from the WO 2011/082761 A1 known.

• - die beiden semitransparenten metallischen Schichten werden bevorzugt von Al oder Ag gewählt; die dielektrische Schicht ist insbesondere eine SiO₂-Schicht;
• - im Falle, dass jede der beiden semitransparenten metallischen Schichten auf Al beruht, liegt die jeweilige bevorzugte Schichtdicke in einem Bereich von 5 nm bis 20 nm, insbesondere bevorzugt in einem Bereich von 10 nm bis 14 nm; die dielektrische SiO₂-Schicht hat vorzugsweise eine Schichtdicke in einem Bereich von 50 nm bis 450 nm, weiter bevorzugt in einem Bereich von 80 nm bis 260 nm und insbesondere bevorzugt in einem Bereich von 210 nm bis 260 nm, wobei die Bereiche von 80 nm bis 100 nm und von 210 nm bis 240 nm speziell für die Bereitstellung eines Gold/Blau-Farbwechsels besonders bevorzugt werden;
• - im Falle, dass jede der beiden semitransparenten metallischen Schichten auf Ag beruht, liegt die jeweilige bevorzugte Schichtdicke in einem Bereich von 15 nm bis 25 nm; die dielektrische SiO₂-Schicht hat vorzugsweise eine Schichtdicke in einem Bereich von 50 nm bis 450 nm, weiter bevorzugt in einem Bereich von 80 nm bis 260 nm und insbesondere bevorzugt in einem Bereich von 210 nm bis 260 nm, wobei die Bereiche von 80 nm bis 100 nm und von 210 nm bis 240 nm speziell für die Bereitstellung eines Gold/Blau-Farbwechsels besonders bevorzugt werden.

Suitable multi-layered structures with two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers typically have the following physical properties:

• the two semitransparent metallic layers are preferably selected from Al or Ag; the dielectric layer is in particular an SiO ₂ layer;
• in the case where each of the two semitransparent metallic layers is based on Al, the respective preferred layer thickness is in a range of 5 nm to 20 nm, particularly preferably in a range of 10 nm to 14 nm; the SiO ₂ dielectric layer preferably has a layer thickness in a range of 50 nm to 450 nm, more preferably in a range of 80 nm to 260 nm, and particularly preferably in a range of 210 nm to 260 nm, wherein the ranges of 80 nm up to 100 nm and from 210 nm to 240 nm are especially preferred for providing a gold / blue color change;
• in the case where each of the two semitransparent metallic layers is based on Ag, the respective preferred layer thickness is in a range of 15 nm to 25 nm; the SiO ₂ dielectric layer preferably has a layer thickness in a range of 50 nm to 450 nm, more preferably in a range of 80 nm to 260 nm, and particularly preferably in a range of 210 nm to 260 nm, wherein the ranges of 80 nm to 100 nm and from 210 nm to 240 nm are especially preferred for providing a gold / blue color change.

• - im Auflicht Magenta, im Durchlicht Blau-Grün;
• - im Auflicht Türkis, im Durchlicht Orange-Gelb;
• - im Auflicht Gold, im Durchlicht Blau-Violett;
• - im Auflicht Silber, im Durchlicht Violett.

The abovementioned multi-layered layer structures not only make it possible to produce a semitransparent functional layer that appears gold-colored when viewed in reflected light and shows a blue hue when viewed in transmitted light, but further color changes can be produced depending on the choice of the layer thickness, in particular of the dielectric layer, eg

• Magenta in transmitted light, blue-green in transmitted light;
• - in incident light turquoise, in transmitted light orange-yellow;
• - in reflected light gold, in transmitted light blue-violet;
• - in reflected light silver, in transmitted light violet.

The semitransparent areas, which give a viewer a different color impression when viewed in incident light and when viewed in transmitted light, can furthermore be obtained by means of an effect pigment composition. Printed layers based on an effect pigment composition which, when viewed in reflected light, exhibit a different color than when viewed in transmitted light, in particular a gold / blue color change, a gold / violet color change, a green / gold / magenta color change, a Violet / green color change or a silver / opaque color change, are eg in the WO 2011/064162 A2 described. The pigments preferably have a longest dimension of edge length from end-to-end in a range of 15 nm to 1000 nm and are based on a transition metal selected from the group consisting of Cu, Ag, Au , Zn, Cd, Ti, Cr, Mn, Fe, Co, Ni, Ru, Rh, Pd, Os, Ir and Pt. The transition metal is preferably Ag. The aspect ratio (ie the ratio of the longest dimension from end to end relative to the thickness) is preferably at least 1.5, in particular in a range from 1.5 to 300. The ratio of the binder to metal pigment is preferably below 10: 1, in particular below 5: 1. Depending on the choice of aspect ratio of the pigment, its longest end-to-end dimension, and adjustment of the pigment / binder ratio, the color can be seen in transmission and the color when viewed in reflection (eg, blue in Transmission and silver, gold, bronze, copper or violet in reflection, in addition also violet, magenta, pink, green or brown in transmission and different colors in reflection, which depend on the choice of pigment / binder ratio). Colors with gold / blue color change between reflection and transmission (in other words, between incident light and transmitted light observation) are, for example, in Examples 1, 2 and 3 in Table 1 of FIG WO 2011/064162 A2 called. Further, Example 4 shows a color with gold / violet color change, Example 5 a color with green-gold / magenta color change, Example 7 a color with violet / green color change and Example 8 a color with silver / opaque color change.

The security element according to the invention can be used in particular as a so-called laminate film be configured, in which the carrier or the carrier substrate is firmly anchored to the embossing lacquer layer. The laminate film, which is in particular in the form of a patch, a strip or a thread, can then be applied to a value document substrate together with the carrier. In particular, a window or a recess in the value document substrate can be closed in this way.

The security element according to the invention can furthermore be designed as a so-called transfer film, in which the carrier or the carrier substrate is not firmly anchored to the embossing lacquer layer, but can be detached from the embossing lacquer layer. The transfer film, which is in particular in the form of a patch, a strip or a thread, can be applied to a value document substrate without the carrier substrate of the transfer film remaining on the value document substrate. Such a procedure is particularly suitable in the case that the value document substrate to be equipped with the security element is a polymer substrate. In this way, the layer thickness in the product obtained is not too high.

• - eine optionale Farbannahmeschicht bzw. Druckannahmeschicht;
• - ein Trägersubstrat, z.B. Polyethylenterephthalat(PET)-Folie;
• - eine Prägelackschicht, die insbesondere eine diffraktive Struktur bildende Reliefstruktur und/oder eine Mikrospiegelanordnung bildende Reliefstruktur aufweist;
• - die Schicht bzw. die Schichten, die die opaken, metallischen Bereiche einerseits und die semitransparenten Bereiche, die einem Betrachter bei der Betrachtung im Auflicht und bei der Betrachtung im Durchlicht einen unterschiedlichen Farbeindruck vermitteln, bilden; dazwischen sind die transparenten Bereiche angeordnet;
• - optional eine Primerschicht;
• - eine Klebschicht, z.B. eine Heißsiegelbeschichtung, die für das Verkleben des Sicherheitselements mit dem Datenträgersubstrat geeignet ist.

According to an advantageous variant, the security element according to the invention, in particular in the case of being present as a laminate film, has the following layers in the sequence:

• an optional ink receiving layer or pressure receiving layer;
• a carrier substrate, eg polyethylene terephthalate (PET) film;
• an embossing lacquer layer which in particular has a relief structure forming a diffractive structure and / or a relief structure forming a micromirror arrangement;
• the layer or layers which form the opaque, metallic areas on the one hand and the semitransparent areas which give a viewer a different color impression when viewed in incident light and when viewed in transmitted light; in between the transparent areas are arranged;
• optionally a primer layer;
• an adhesive layer, eg a heat-seal coating, which is suitable for bonding the security element to the data carrier substrate.

• - eine Klebschicht, z.B. eine Heißsiegelbeschichtung, die für das Verkleben des Sicherheitselements mit dem Datenträgersubstrat geeignet ist;
• - eine optionale Primerschicht;
• - ein Trägersubstrat, z.B. Polyethylenterephthalat(PET)-Folie;
• - eine Prägelackschicht, die insbesondere eine diffraktive Struktur bildende Reliefstruktur und/oder eine Mikrospiegelanordnung bildende Reliefstruktur aufweist;
• - die in die Prägelackschicht eingeprägte Reliefstruktur weist die transparenten Bereiche und die semitransparenten Bereiche in zwei separaten Teilbereichen auf und ein Teil der semitransparenten Bereiche ist zusätzlich mit einer mittels Aufdampfen erhältlichen Metallisierung versehen oder ist mit plättchenförmigen Metallpigmenten bedruckt, um auf diese Weise die metallischen, opaken Bereiche zu bilden;
• - eine optionale Schutzschicht;
• - eine optionale Farbannahmeschicht bzw. Druckannahmeschicht.

According to a further advantageous variant, the security element according to the invention, in particular in the case of being present as a laminate film, has the following layers in the following order:

• an adhesive layer, eg a heat-seal coating, which is suitable for bonding the security element to the data carrier substrate;
• an optional primer layer;
• a carrier substrate, eg polyethylene terephthalate (PET) film;
• an embossing lacquer layer which in particular has a relief structure forming a diffractive structure and / or a relief structure forming a micromirror arrangement;
• the relief structure embossed into the embossing lacquer layer has the transparent regions and the semitransparent regions in two separate subregions and a part of the semi-transparent regions is additionally provided with metallization obtainable by vapor deposition or is printed with platelet-shaped metal pigments, in this way the metallic, opaque ones To form areas;
• - an optional protective layer;
• an optional ink receiving layer or printing receiving layer.

The inventive security element according to the above further advantageous variant can in particular be designed such that the semi-transparent regions are based on a multi-layered structure which appears gold-colored when viewed in reflected light and shows a blue hue when viewed in transmitted light, whereby a part of the semitransparent Areas additionally with eg provided by vapor deposition metallization or is printed with platelet-shaped metal pigments, to form in this way silver, metallic, opaque areas.

• - eine optionale Farbannahmeschicht bzw. Druckannahmeschicht;
• - ein Trägersubstrat, z.B. Polyethylenterephthalat(PET)-Folie;
• - eine Prägelackschicht, die insbesondere eine diffraktive Struktur bildende Reliefstruktur und/oder eine Mikrospiegelanordnung bildende Reliefstruktur aufweist;
• - die Schicht bzw. die Schichten, die die opaken, metallischen Bereiche einerseits und die semitransparenten Bereiche, die einem Betrachter bei der Betrachtung im Auflicht und bei der Betrachtung im Durchlicht einen unterschiedlichen Farbeindruck vermitteln, bilden; dazwischen sind die transparenten Bereiche angeordnet;
• - eine optionale Primerschicht;
• - eine Klebschicht, z.B. eine Heißsiegelbeschichtung, die für das Verkleben des Sicherheitselements mit dem Datenträgersubstrat geeignet ist.

According to an advantageous variant, the security element according to the invention, in particular in the case of being present as a transfer film, has the following layers in the sequence:

• an optional ink receiving layer or pressure receiving layer;
• a carrier substrate, eg polyethylene terephthalate (PET) film;
• an embossing lacquer layer which in particular has a relief structure forming a diffractive structure and / or a relief structure forming a micromirror arrangement;
• the layer or layers which form the opaque, metallic areas on the one hand and the semitransparent areas which give a viewer a different color impression when viewed in incident light and when viewed in transmitted light; in between the transparent areas are arranged;
• an optional primer layer;
• an adhesive layer, eg a heat-seal coating, which is suitable for bonding the security element to the data carrier substrate.

In the above variant, in the case of the presence of a transfer film, the embossing lacquer layer has only a weak adhesion to the carrier substrate, which is due, for example, to poor adhesion of the embossing lacquer to the substrate Carrier substrate or by the introduction of a special separation layer can be achieved.

• - den Schritt des Bereitstellens eines Trägersubstrats mit einer darauf aufgebrachten Prägelackschicht;
• - den Schritt des Aufdruckens einer löslichen Waschfarbe in den Bereichen außerhalb der zu erzeugenden metallischen, opaken Bereiche;
• - den Schritt des Aufbringens einer Metallisierung, z.B. eine reflektierende Al-, Cr-, Cu- oder Au-Schicht, insbesondere mittels Aufdampfen, wobei eine Al-Schicht bevorzugt wird;
• - den Schritt des Abwaschens der löslichen Waschfarbe zusammen mit der oberhalb der Waschfarbe befindlichen Metallisierung mittels eines Lösungsmittels, sodass metallische, opake Bereiche auf der Prägelackschicht zurückbleiben;
• - den Schritt des Aufdruckens einer löslichen Waschfarbe in den Bereichen außerhalb der zu erzeugenden semitransparenten Bereiche;
• - den Schritt des Erzeugens eines mehrschichtigen Aufbaus mit zwei semitransparenten metallischen Schichten und einer zwischen den zwei semitransparenten metallischen Schichten angeordneten dielektrischen Schicht, insbesondere mittels Aufdampfen;
• - den Schritt des Abwaschens der löslichen Waschfarbe zusammen mit der oberhalb der Waschfarbe befindlichen mehrschichtigen Aufbaus, sodass außer den metallischen, opaken Bereichen auch semitransparente Bereiche auf der Prägelackschicht zurückbleiben und zwischen den metallischen, opaken Bereichen und den semitransparenten Bereichen transparente Bereiche gebildet sind;
• - optional den Schritt des Aufbringens einer optionalen Primerschicht; und
• - optional den Schritt des Aufbringens einer Klebschicht, z.B. eine Heißsiegellackschicht.

The invention further relates to a method for producing the security element according to the invention for securing value documents with a carrier, a layer structure arranged on the carrier via an embossing lacquer layer and an adhesive layer suitable for bonding the security element to a valuable article, the layer structure comprising opaque, metallic regions, semi-transparent areas, which give a viewer a different color impression when viewed in reflected light and when viewed in transmitted light, and have transparent areas, the method comprising the following steps:

• the step of providing a carrier substrate having an embossing lacquer layer applied thereto;
• the step of printing a soluble wash ink in the areas outside the metallic, opaque areas to be created;
• the step of applying a metallization, eg a reflective Al, Cr, Cu or Au layer, in particular by means of vapor deposition, an Al layer being preferred;
• the step of washing off the soluble wash paint together with the above the wash paint metallization by means of a solvent, so that metallic, opaque areas remain on the embossing lacquer layer;
• the step of printing a soluble wash ink in the areas outside the semitransparent areas to be created;
• the step of producing a multilayer structure comprising two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers, in particular by means of vapor deposition;
• the step of washing off the soluble wash paint together with the multi-layered structure above the wash color so that, in addition to the metallic, opaque areas, semi-transparent areas remain on the embossing lacquer layer and transparent areas are formed between the metallic, opaque areas and the semi-transparent areas;
• optionally the step of applying an optional primer layer; and
• optionally the step of applying an adhesive layer, eg a heat-sealing lacquer layer.

• - den Schritt des Bereitstellens eines Trägersubstrats mit einer darauf aufgebrachten Prägelackschicht;
• - den Schritt des drucktechnischen Erzeugens metallischer, opaker Bereiche auf der Prägelackschicht mittels einer auf plättchenförmigen Metallpigmenten beruhenden Druckfarbe;
• - den Schritt des Aufdruckens einer löslichen Waschfarbe in den Bereichen außerhalb der zu erzeugenden semitransparenten Bereiche;
• - den Schritt des Erzeugens eines mehrschichtigen Aufbaus mit zwei semitransparenten metallischen Schichten und einer zwischen den zwei semitransparenten metallischen Schichten angeordneten dielektrischen Schicht, insbesondere mittels Aufdampfen;
• - den Schritt des Abwaschens der löslichen Waschfarbe zusammen mit der oberhalb der Waschfarbe befindlichen mehrschichtigen Aufbaus, sodass außer den metallischen, opaken Bereichen auch semitransparente Bereiche auf der Prägelackschicht zurückbleiben und zwischen den metallischen, opaken Bereichen und den semitransparenten Bereichen transparente Bereiche gebildet sind;
• - optional den Schritt des Aufbringens einer optionalen Primerschicht; und
• - optional den Schritt des Aufbringens einer Klebschicht, z.B. eine Heißsiegellackschicht.

A further method for producing the security element according to the invention for securing value documents with a carrier, a layer structure arranged on the carrier via an embossing lacquer layer and an adhesive layer suitable for bonding the security element to a valuable article, wherein the layer structure comprises opaque, metallic regions, semitransparent regions To give a viewer a different color impression when viewed in reflected light and when viewed in transmitted light, and having transparent areas, comprises the following steps:

• - the step of providing a carrier substrate having an embossing lacquer layer applied thereto;
• the step of producing metallic, opaque areas on the embossing lacquer layer by means of a printing ink based on platelet-shaped metal pigments;
• the step of printing a soluble wash ink in the areas outside the semitransparent areas to be created;
• the step of producing a multilayer structure comprising two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers, in particular by means of vapor deposition;
• the step of washing off the soluble wash paint together with the multi-layered structure above the wash color so that, in addition to the metallic, opaque areas, semi-transparent areas remain on the embossing lacquer layer and transparent areas are formed between the metallic, opaque areas and the semi-transparent areas;
• optionally the step of applying an optional primer layer; and
• optionally the step of applying an adhesive layer, eg a heat-sealing lacquer layer.

• - den Schritt des Bereitstellens eines Trägersubstrats mit einer darauf aufgebrachten Prägelackschicht;
• - den Schritt des Aufdruckens einer löslichen Waschfarbe in den Bereichen außerhalb zu erzeugender semitransparenter Bereiche;
• - den Schritt des Erzeugens eines mehrschichtigen Aufbaus mit zwei semitransparenten metallischen Schichten und einer zwischen den zwei semitransparenten metallischen Schichten angeordneten dielektrischen Schicht, insbesondere mittels Aufdampfen;

• - den Schritt des Abwaschens der löslichen Waschfarbe zusammen mit der oberhalb der Waschfarbe befindlichen mehrschichtigen Aufbaus, sodass semitransparente Bereiche auf der Prägelackschicht zurückbleiben;
• - den Schritt des Aufdruckens einer löslichen Waschfarbe in den Bereichen außerhalb zu erzeugenden metallischen, opaken Bereiche;
• - den Schritt des Aufbringens einer Metallisierung, z.B. eine reflektierende Al-, Cr-, Cu- oder Au-Schicht, mittels Aufdampfen, wobei eine Al-Schicht bevorzugt wird, wobei der Schritt so erfolgt, dass ein Teil der semitransparenten Bereiche zusätzlich mit einer mittels Aufdampfen erhältlichen Metallisierung versehen ist, um auf diese Weise die metallischen, opaken Bereiche zu bilden;
• - den Schritt des Abwaschens der löslichen Waschfarbe zusammen mit der oberhalb der Waschfarbe befindlichen Metallisierung;
• - optional den Schritt des Aufbringens einer optionalen Primerschicht; und
• - optional den Schritt des Aufbringens einer Klebschicht, z.B. eine Heißsiegellackschicht.

A further method for producing the security element according to the invention for securing value documents with a carrier, a layer structure arranged on the carrier via an embossing lacquer layer and an adhesive layer suitable for bonding the security element to a valuable article, wherein the layer structure comprises opaque, metallic regions, semitransparent regions To give a viewer a different color impression when viewed in reflected light and when viewed in transmitted light, and having transparent areas, comprises the following steps:

• the step of providing a carrier substrate having an embossing lacquer layer applied thereto;
• the step of printing a soluble wash ink in the areas outside semi-transparent areas to be produced;
• the step of producing a multilayer structure comprising two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers, in particular by means of vapor deposition;

• the step of washing off the soluble wash paint together with the multi-layered structure located above the wash color so that semitransparent areas remain on the embossing lacquer layer;
• the step of printing a soluble wash ink in the areas of metallic, opaque areas to be generated outside;
• the step of applying a metallization, eg a reflective Al, Cr, Cu or Au layer, by means of vapor deposition, wherein an Al layer is preferred, the step being such that a part of the semi-transparent regions additionally with a provided by vapor deposition metallization, so as to form the metallic, opaque areas;
• the step of washing off the soluble wash paint together with the metallization above the wash color;
• optionally the step of applying an optional primer layer; and
• optionally the step of applying an adhesive layer, eg a heat-sealing lacquer layer.

The security element according to the invention can additionally be equipped with magnetic and / or fluorescent security features.

The invention further relates to a data carrier with a security element of the type described above. The data carrier can be a value document, such as a banknote, in particular a paper banknote, a polymer banknote or a film composite banknote, a share, a bond, a deed, a coupon , a check, a high-quality entrance ticket, as well as an identification card, such as a credit card, a bank card, a cash card, an authorization card, an identity card or a pass personalization page.

Further exemplary embodiments and advantages of the invention are explained below with reference to the figures, in the representation of which a representation true to scale and proportion has been dispensed with in order to increase the clarity.

• 1 eine schematische Darstellung einer Banknote mit einem erfindungsgemäßen Sicherheitselement;
• 2 ein erfindungsgemäßes Sicherheitselement gemäß einem ersten Ausführungsbeispiel in Draufsicht;
• 3 einen Ausschnitt des erfindungsgemäßen Sicherheitselements gemäß dem ersten Ausführungsbeispiel in Querschnittansicht;
• 4 einen Ausschnitt eines erfindungsgemäßen Sicherheitselements gemäß einem zweiten Ausführungsbeispiel in Querschnittansicht;
• 5 einen Ausschnitt eines erfindungsgemäßen Sicherheitselements gemäß einem dritten Ausführungsbeispiel in Querschnittansicht;
• 6 ein erfindungsgemäßes Sicherheitselement gemäß einem vierten Ausführungsbeispiel in Draufsicht;
• 7 eine schematische Darstellung einer Banknote mit einem erfindungsgemäßen Sicherheitselement in Form eines Sicherheitsfadens;
• 8 ein erfindungsgemäßes Sicherheitselement gemäß einem fünften Ausführungsbeispiel in Draufsicht;
• 9 einen Ausschnitt des erfindungsgemäßen Sicherheitselements gemäß dem fünften Ausführungsbeispiel in Querschnittansicht;
• 10 ein erfindungsgemäßes Sicherheitselement gemäß einem sechsten Ausführungsbeispiel in Draufsicht;
• 11 ein erfindungsgemäßes Sicherheitselement gemäß einem siebten Ausführungsbeispiel bei der Betrachtung im Auflicht; und
• 12 das erfindungsgemäße Sicherheitselement gemäß dem siebten Ausführungsbeispiel bei der Betrachtung im Auflicht.

Show it:

• 1 a schematic representation of a banknote with a security element according to the invention;
• 2 a security element according to the invention according to a first embodiment in plan view;
• 3 a detail of the security element according to the invention according to the first embodiment in cross-sectional view;
• 4 a detail of a security element according to the invention according to a second embodiment in cross-sectional view;
• 5 a detail of a security element according to the invention according to a third embodiment in cross-sectional view;
• 6 a security element according to the invention according to a fourth embodiment in plan view;
• 7 a schematic representation of a banknote with a security element according to the invention in the form of a security thread;
• 8th a security element according to the invention according to a fifth embodiment in plan view;
• 9 a detail of the security element according to the invention according to the fifth embodiment in cross-sectional view;
• 10 a security element according to the invention according to a sixth embodiment in plan view;
• 11 a security element according to the invention according to a seventh embodiment when viewed in incident light; and
• 12 the security element according to the invention according to the seventh embodiment when viewed in incident light.

The invention will now be explained using the example of security elements for banknotes. 1 shows a schematic representation of a banknote 1 with a transparent window area 3 (shown in dashed lines), with a security element according to the invention 2 is provided in the form of a patch. The banknote 1 Based on a paper substrate that is in the range 3 has a continuous recess. The continuous recess is on at least one side of the Paper substrate of the security element according to the invention, which is present as a laminate film covered. On the opposite side of the paper substrate from the security element, the paper substrate may optionally be provided with an additional transparent film. The additional transparent film can cover, for example, at least the area of the continuous recess. The in the 1 banknote shown has the typographically generated denomination in the lower left area " 20 " on.

The 2 shows a security element according to the invention 2 according to a first embodiment in plan view. The security element 2 is semitransparent in the shaded area, the viewer perceives this area when viewed in reflected light in the form of a gold-colored metallization, when viewed in transmitted light the viewer perceives this area in a blue hue. In the black area (see the numeral " 2 ") Is the security element 2 opaque, metallic, both when viewed in reflected light and when viewed in transmitted light. In the white area (see the figure " 0 ") Is the security element 2 transparent.

• 5 bis 15 nm Al / 85 bis 250 nm SiO₂ / 5 bis 15 nm Al, insbesondere
• 5 bis 15 nm Al / 85 bis 125 nm SiO₂ / 5 bis 15 nm Al; oder
• 15 bis 25 nm Ag / 80 bis 105 nm SiO₂ / 15 bis 25 nm Ag;

The 3 shows a section of the security element according to the invention 2 according to the first embodiment in cross-sectional view. The carrier 4 in the form of a transparent plastic film, for example a PET film, has an embossing lacquer 5 on. The relief structure (ie the surface) of the embossing lacquer 5 contains eg a microstructure. Above the embossing lacquer 5 On the left and on the right side there are semitransparent thin-film elements, which give a viewer a different color impression when viewed in reflected light and when viewed in transmitted light, in the present case thin-film elements, each having two semitransparent mirror layers (with the reference numbers 6 and 8th ) and a dielectric spacer layer disposed between the two mirror layers 7 exhibit. Such a thin-film element, which appears golden in reflected light and blue in transmitted light, is in the WO 2011/082761 A1 described. Exemplary layer arrangements are, as mentioned earlier in the description:

• 5 to 15 nm Al / 85 to 250 nm SiO ₂ / Al from 5 to 15 nm, in particular
• 5 to 15 nm Al / 85 and 125 nm SiO ₂ / Al from 5 to 15 nm; or
• 15 to 25 nm Ag / 80 to 105 nm SiO _2/15 to 25 nm Ag;

The semitransparent areas are in the 3 with the letter " A "And make that in the 2 hatched, the number " 20 "Surrounding background.

The middle area of the embossing lacquer 6 is provided with an opaque, reflective Al layer. The opaque, metallic area is in the 3 with the letter " C "Provided and forms the in the 2 shown number "2".

The transparent areas are in the 3 with the letter " B "And form the in the 2 number shown " 0 ".

That in the 3 illustrated security element in the form of a laminate film is by means of an adhesive layer 11 , in particular a heat sealing lacquer layer, on the paper substrate of the banknote 1 applied so that the recess 3 the banknote of the security element is closed on one side and the viewer in the window area of the banknote, the optical reflected light and transmitted light effects can perceive particularly well. The adhesive layer 11 may optionally have an optional primer layer 10 to be ordered.

Yes, after refinement of the microstructure of the embossing lacquer layer 5 shows the security element in the areas " A " and or " B "Eg interesting three-dimensional arch effects. The 5 shows a section of a security element according to the invention according to a third embodiment, which is connected to the first embodiment according to the 3 is ajar, in cross-sectional view. In the 5 is the micro- or nanostructure of the embossing lacquer layer 5 and to the relief of the embossing lacquer layer 5 adaptive semi-transparent thin-film elements (with the layers 6 . 7 and 8th ) on the one hand, and the opaque, metallic Al layer 9 on the other hand, highlighted graphically.

The 4 shows a section of a security element according to the invention according to a second embodiment in cross-sectional view. That in the 4 shown security element is also like that in the 3 and 5 shown security elements in the form of a laminate film and is suitable for covering the recess 3 the Indian 1 banknote shown 1 , That in the 4 shown security element contains a carrier 4 in the form of a transparent plastic film, eg a PET film. Above the carrier 4 is an embossing lacquer 5 before, which is provided with a relief structure in the form of a micro or nanostructure. Above the embossing lacquer 5 On the left side, on the right side and in the central area, there are semitransparent thin-film elements which give a viewer a different color impression when viewed in reflected light and when viewed in transmitted light. In the present case, these are thin-film elements, each of which has two semitransparent mirror layers. with the reference numbers 6 and 8th ) and a dielectric spacer layer disposed between the two mirror layers 7 exhibit. Such a thin-film element appears gold-colored, for example, in incident light and blue in transmitted light. In addition, certain areas of the left and right semitransparent thin-film elements have a reflective Al layer 12 and form in this way opaque, metallic areas. The semitransparent thin-film elements (the respective layers 6 . 7 and 8th included) and the opaque, metallic layer 12 be from the protective varnish 10 covered. Above the protective varnish 10 Optionally, a paint receiving layer or pressure receiving layer (not shown in the figure) can be arranged so that the security element can additionally be printed with ink.

That in the 4 illustrated security element in the form of a laminate film is by means of an adhesive layer 11 , in particular a heat sealing lacquer layer, on the paper substrate of the banknote 1 applied so that the recess 3 the banknote of the security element is closed on one side and the viewer in the window area of the banknote, the optical reflected light and transmitted light effects can perceive particularly well.

That in the 4 The security element shown appears to the viewer in the areas "C" metallic and opaque (eg silver), in the semitransparent areas "A" when viewed in incident light gold and when viewed in transmitted light in blue hue. The areas "B" represent the transparent areas.

The 6 shows a security element according to the invention according to a fourth embodiment in plan view. The fourth embodiment is connected to that in connection with the 1 to 4 described embodiment ajar. Other than that in the 2 shown security element takes the viewer in the case of 6 the number " 2 "When viewed in reflected light gold and true when viewed in transmitted light in blue hue, ie the number" 2 "Is formed in the shape of a semi-transparent region, for example, by means of a semi-transparent Al / SiO ₂ / Al thin-film element. The number " 0 "Is formed in the shape of a transparent area. The numbers " 2 " and " 0 "Surrounding background is in the shape of an opaque, metallic surface, in the example in the form of a reflective Al layer.

The 7 shows a schematic representation of a banknote 13 with a security element according to the invention 14 in the form of a security thread or security strip. The banknote 13 is a plastic banknote and is based on a polymer substrate. The security element 14 was applied to the polymer substrate of the banknote prior to application 13 in the form of a transfer film (ie with a removable carrier substrate).

The 8th shows the detail of a security element according to the invention 14 according to a fifth embodiment in plan view. The security element 14 is semitransparent in the shaded area, the viewer perceives this area when viewed in reflected light in the form of a gold-colored metallization, when viewed in transmitted light the viewer perceives this area in a blue hue. In the black area (see the left and right black numbers) 20 ") Is the security element 14 opaque, metallic, both when viewed in reflected light and when viewed in transmitted light. In the white area (see the middle white number " 20 ") Is the security element 2 transparent.

• 5 bis 15 nm Al / 85 bis 250 nm SiO₂ / 5 bis 15 nm Al, insbesondere
• 5 bis 15 nm Al / 85 bis 125 nm SiO₂ / 5 bis 15 nm Al; oder
• 15 bis 25 nm Ag / 80 bis 105 nm SiO₂ / 15 bis 25 nm Ag;

The 9 shows a section of the security element according to the invention 14 according to the fifth embodiment in cross-sectional view. The carrier 4 in the form of a transparent plastic film, for example a PET film, has an embossing lacquer 5 on. The relief structure (ie the surface) of the embossing lacquer 5 contains eg a microstructure. Above the embossing lacquer 5 On the left and on the right side there are semitransparent thin-film elements, which give a viewer a different color impression when viewed in reflected light and when viewed in transmitted light, in the present case thin-film elements, each having two semitransparent mirror layers (with the reference numbers 6 and 8th ) and a dielectric spacer layer disposed between the two mirror layers 7 exhibit. Such a thin-film element, which appears golden in reflected light and blue in transmitted light, is in the WO 2011/082761 A1 described. Exemplary layer arrangements are, as mentioned earlier in the description:

• 5 to 15 nm Al / 85 to 250 nm SiO ₂ / Al from 5 to 15 nm, in particular
• 5 to 15 nm Al / 85 and 125 nm SiO ₂ / Al from 5 to 15 nm; or
• 15 to 25 nm Ag / 80 to 105 nm SiO _2/15 to 25 nm Ag;

The semitransparent areas are in the 9 with the letter " A "And make that in the 8th hatched, the numbers " 20 "Surrounding background.

The middle area of the embossing lacquer 6 is provided with an opaque, reflective Al layer. The opaque, metallic area is in the 9 with the letter " C "Provided and forms the in the 8th left and right black numbers shown " 20 ".

The transparent areas are in the 9 with the letter " B "And form the in the 8th shown, mean, white number " 20 ".

That in the 9 illustrated security element in the form of a transfer film is by means of an adhesive layer 11 , in particular a heat sealing lacquer layer, on the polymer substrate of the banknote 13 applied. After application to the polymer substrate, the detachment of the temporary carrier takes place 4 from the security element applied to the banknote. In this way, the layer thickness of the banknote 14 in the area of the security element 14 not too high.

The 10 shows a security element according to the invention according to a sixth embodiment in plan view. The sixth embodiment is connected to that in connection with the 7 to 9 described embodiment ajar. Other than that in the 8th shown security element takes the viewer in the case of 10 the numbers shown hatched on the left and right " 20 "When viewed in reflected light, gold-colored and when viewed in transmitted light in the blue hue, ie the hatched numbers" 20 Are each formed in the shape of a semitransparent region, for example by means of a semi-transparent Al / SiO ₂ / Al thin-film element. The mean, white number " 20 "Is formed in the shape of a transparent area. The numbers " 20 "Surrounding background is in the shape of an opaque, metallic surface, in the example in the form of a reflective Al layer.

In the case of in the 8th and 10 security threads shown, the viewer can see all numbers " 20 "Recognize both when viewing in reflected light and when viewing in transmitted light. The 11 and 12 describe a seventh embodiment, which in connection with the 7 to 9 ajar the described embodiment, in which the viewer the numbers shown on the left and right " 20 "But not when viewing in reflected light (see the 11 ), but only when viewed in transmitted light (see the 12 ) can recognize.

In the case of the seventh embodiment is also in the 9 used layer structure shown, wherein the middle region of the embossing lacquer 5 is not provided with an opaque, reflective, silver Al layer, but with an opaque, reflective, gold-colored layer (eg an Au layer or a Cu layer). This opaque, metallic, gold colored area forms in the 11 and 12 the black background. The numbers shown on the left and right " 20 "Are each based on a semi-transparent thin film, which is golden when viewed in reflected light and is bluish when viewed in transmitted light. Therefore, the observer can see the two numbers "20" left and right when viewed in incident light (see Figs 11 ), but only when viewed in transmitted light (see the 12 ).

The in the 11 and 12 shown mean number " 20 "Is in the shape of a transparent area (see the area" B " in the 9 ) educated.

In an alternative variant to the seventh embodiment described above, for the opaque, metallic, reflective layer (see the reference number 9 in the 9 ) a silver Al layer can be used and for the semitransparent thin layer (see the layers 6 . 7 and 8th in the 9 ) is an Al / SiO ₂ / Al layer structure or an Al / SiO ₂ / Al layer structure which is silver when viewed in reflected light and purple when viewed in transmitted light.

Basically, the in the 5 shown relief structure of the embossing lacquer layer 5 are present in all other embodiments, in the 3 . 4 and 9 For the sake of simplicity, drawing was omitted from the relief.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2011/082761 A1 [0004, 0013, 0033, 0045]
• WO 2013/186167 A2 [0011]
• WO 2010/069823 A1 [0011]
• WO 2005/051675 A2 [0011]
• WO 2011/064162 A2 [0011, 0016]

Claims (22)

A security element for securing value documents with a carrier, a layer structure arranged on the carrier via an embossing lacquer layer and an adhesive layer suitable for bonding the security element to a valuable article, wherein the layer structure comprises opaque, metallic regions, semitransparent regions which are visible to the viewer when viewed in incident light and when viewed in transmitted light, give a different color impression, and have transparent areas, wherein both the transparent areas and the opaque, metallic areas are each in the form of patterns, characters or an encoding and the semi-transparent areas represent a background. A security element for securing value documents with a carrier, a layer structure arranged on the carrier via an embossing lacquer layer and an adhesive layer suitable for bonding the security element to a valuable article, wherein the layer structure comprises opaque, metallic regions, semitransparent regions which are visible to the viewer when viewed in incident light and when viewed in transmitted light, impart a different color impression, and have transparent areas, wherein both the transparent areas and the semi-transparent areas are each in the form of patterns, characters or an encoding and the opaque, metallic areas represent a background. Security element according to one of Claims 1 or 2 , wherein the opaque, metallic areas are based on a metallization obtainable by vapor deposition or are available by printing technology and are based on platelet-shaped metal pigments. Security element according to one of Claims 1 to 3 in which the semi-transparent regions, which give a viewer a different color impression when viewed in reflected light and when viewed in transmitted light, are based on a two semitransparent mirror layers and a dielectric spacer layer having a thin dielectric layer between the two mirror layers. Security element according to one of Claims 1 to 3 , wherein the semi-transparent areas, which give a viewer a different color impression when viewed in reflected light and when viewed in transmitted light, can be obtained by means of an effect pigment composition. Security element according to one of Claims 1 to 5 wherein the embossing lacquer layer is provided with an impressed relief structure and the relief structure in particular a diffractive structure, such as a hologram, a holographic grating image or a hologram-like diffraction structure, or an achromatic structure, such as a matte structure, or a micromirror arrangement or a blaze grating with a sawtooth-like Grove profile or a Fresnel lens arrangement or a combination of two or more of the above elements forms. Security element according to one of Claims 1 to 6 wherein the embossing lacquer layer has an embossed relief structure in the respective regions in the form of patterns, characters or a coding, namely the transparent regions on the one hand and the opaque, metallic regions on the other hand or the transparent regions on the one hand and the semitransparent regions on the other hand, with two different relief structures is formed, in particular so that the one relief structure forms a diffractive structure and the second relief structure forms a micromirror arrangement. Security element after Claim 7 wherein the embossing lacquer layer with an embossed relief structure has a third relief structure in the areas representing a background. Security element according to one of Claims 1 to 6 wherein the embossing lacquer layer with an embossed relief structure has the same relief structure in the regions formed in each case in the form of patterns, characters or an encoding and has a further relief structure in the areas representing a background, in particular such that the one relief structure forms a diffractive structure and the second relief structure forms a micromirror arrangement. Security element according to one of Claims 1 to 9 , Wherein each formed in the form of patterns, characters or a coding areas are at least partially arranged register accurate to each other. Security element according to one of Claims 1 to 10 in which (i) the color impression of the semitransparent regions is identical to the color impression of the opaque, metallic regions when viewed in incident light and the color impression of the semitransparent regions differs from the color impression of the opaque, metallic regions when viewed in transmitted light, or (ii) Both the color impression of the semitransparent areas when viewed in reflected light, and the color impression of the semi-transparent areas when viewed in transmitted light from the color impression of the opaque, metallic areas is different. Security element according to one of Claims 1 to 11 in which the relief structure embossed into the embossing lacquer layer has the transparent regions, the metallic, opaque regions and the semi-transparent regions in three separate partial regions. Security element according to one of Claims 1 to 11 in which the embossing layer embossed relief structure has the transparent regions and the semi-transparent regions in two separate subregions and a part of the semi-transparent regions is additionally provided with a metallization obtainable by vapor deposition or printed with platelet-shaped metal pigments, in this way the metallic, opaque To form areas. Security element according to one of Claims 1 to 13 wherein the layer sequence of the security element is the following: a) carrier; b) embossing lacquer layer with embossed relief structure; c) layer structure, the opaque, metallic areas, semitransparent areas, which give a viewer a different color impression when viewed in reflected light and when viewed in transmitted light, and has transparent areas; d) for the bonding of the security element with a valuable item suitable adhesive layer. Security element according to one of Claims 1 to 13 wherein the layer sequence of the security element is the following: a) adhesive layer suitable for bonding the security element to a valuable article; b) carrier; c) embossing lacquer layer with embossed relief structure; d) layer structure, the opaque, metallic areas, semi-transparent areas, which give a viewer a different color impression when viewed in reflected light and when viewed in transmitted light, and has transparent areas; e) protective layer, in particular protective layer based on a protective lacquer. Security element according to one of Claims 1 to 15 wherein the security element is a security tape, a security strip, a patch or a label for application to a security paper, value document or the like. Disk with a security element according to one of Claims 1 to 16 , Disk after Claim 17 , wherein the security element is arranged in a transparent window area of the data carrier. Disk after Claim 17 or 18 wherein the data carrier is a value document, such as a banknote, in particular a paper banknote, polymer banknote or composite film banknote, or identity card. Method for producing a security element for securing value documents, in particular a security element according to one of Claims 1 to 16 with a carrier, one on the carrier over an embossing lacquer layer arranged layer structure and a suitable for bonding the security element with a valuable item adhesive layer, wherein the layer structure opaque, metallic areas, semitransparent areas that give a viewer when viewed in incident light and when viewed in transmitted light a different color impression, and transparent areas, the method comprising the steps of: - the step of providing a carrier substrate having an embossing lacquer layer applied thereto; the step of printing a soluble wash ink in the areas outside the metallic, opaque areas to be created; the step of applying a metallization, eg a reflective Al, Cr, Cu or Au layer, in particular by means of vapor deposition, an Al layer being preferred; the step of washing off the soluble wash paint together with the above the wash paint metallization by means of a solvent, so that metallic, opaque areas remain on the embossing lacquer layer; the step of printing a soluble wash ink in the areas outside the semitransparent areas to be created; the step of producing a multilayer structure comprising two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers, in particular by means of vapor deposition; the step of washing off the soluble wash paint together with the multi-layered structure above the wash color so that, in addition to the metallic, opaque areas, semi-transparent areas remain on the embossing lacquer layer and transparent areas are formed between the metallic, opaque areas and the semi-transparent areas; optionally the step of applying an optional primer layer; and optionally the step of applying an adhesive layer, eg a heat-sealing lacquer layer. Method for producing a security element for securing value documents, in particular a security element according to one of Claims 1 to 16 , comprising a support, a layer structure arranged on the support via an embossing lacquer layer and an adhesive layer suitable for bonding the security element to a valuable article, wherein the layer structure comprises opaque, metallic regions, semitransparent regions which the viewer sees when viewed in incident light and when viewed transmit a different color impression in transmitted light, and has transparent regions, comprising the following steps: the step of providing a carrier substrate with an embossing lacquer layer applied thereto; the step of producing metallic, opaque areas on the embossing lacquer layer by means of a printing ink based on platelet-shaped metal pigments; the step of printing a soluble wash ink in the areas outside the semitransparent areas to be created; the step of producing a multilayer structure comprising two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers, in particular by means of vapor deposition; the step of washing off the soluble wash paint together with the multi-layered structure above the wash color so that, in addition to the metallic, opaque areas, semi-transparent areas remain on the embossing lacquer layer and transparent areas are formed between the metallic, opaque areas and the semi-transparent areas; optionally the step of applying an optional primer layer; and optionally the step of applying an adhesive layer, eg a heat-sealing lacquer layer. Method for producing a security element for securing value documents, in particular a security element according to one of Claims 1 to 16 , comprising a support, a layer structure arranged on the support via an embossing lacquer layer and an adhesive layer suitable for bonding the security element to a valuable article, wherein the layer structure comprises opaque, metallic regions, semitransparent regions which the viewer sees when viewed in incident light and when viewed in transmitted light to give a different color impression, and has transparent areas, comprises the following steps: the step of providing a carrier substrate with an embossing lacquer layer applied thereto; the step of printing a soluble wash ink in the areas outside semi-transparent areas to be produced; the step of producing a multilayer structure comprising two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers, in particular by means of vapor deposition; the step of washing off the soluble wash paint together with the multi-layered structure located above the wash color so that semitransparent areas remain on the embossing lacquer layer; the step of printing a soluble wash ink in the areas of metallic, opaque areas to be generated outside; the step of applying a metallization, eg a reflective Al, Cr, Cu or Au layer, by means of vapor deposition, wherein an Al layer is preferred, the step being such that a part of the semi-transparent regions additionally with a provided by vapor deposition metallization, so as to form the metallic, opaque areas; the step of washing off the soluble wash paint together with the metallization above the wash color; optionally the step of applying an optional primer layer; and optionally the step of applying an adhesive layer, eg a heat-sealing lacquer layer.

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