EP4112326A1 - Security substrate and valuable document produced therefrom - Google Patents

Abstract

The invention relates to a security substrate for documents of value, such as a banknote (1), a check, a credit or other payment card, an identity card or the like, which has a front and a back, covers a specific area in plan view and further has: a first carrier film (10), which extends over at least 50% of the specified area, an essentially opaque layer (17) arranged over the first carrier film (10) and covering at least 25%, preferably more than 50% and particularly preferably more than 75% of the specified area, a first print acceptance layer (18) arranged over the opaque layer (17) with at least one first colored printing element (29) applied thereto, and at least one relief structure (14, 15) between the first opaque layer (17) and the first carrier film (10) and is provided with a reflection-increasing coating (15), which causes an optically variable effect together with the relief structure (11) or alone. As an alternative to this, the first essentially opaque layer can also be omitted and the first pressure acceptance layer can have an opacity.

Description

The invention relates to a security substrate for documents of value, such as banknotes, cheques, credit or other payment cards, identity cards or the like, which has a front and a back and covers a specific area in plan view, is film-based and has at least one relief structure.

Banknotes with different substrates currently exist. Paper, polymer and mixed forms of paper and polymer in the form of so-called hybrid banknotes are known. Special process steps are required for each banknote type in order to apply security elements to the banknote paper or to create them on the banknote paper when the banknotes are printed.

For documents of value, such as banknotes, foil-based security features, e.g. B. holograms, optically variable elements and / or transparent windows can be used. They are produced on foil and later applied to banknote paper to obtain a security substrate that can be printed. Security features are known in the prior art that have at least one relief structure, usually produced by embossing, such as holograms, nanostructures, micromirrors, moiré magnifiers, etc.

The security features are film-based, and the substrate comprising at least one film is applied to a security substrate as a transfer element. This has the disadvantage that such security features can only be distributed or arranged on the security substrate and the document of value later produced from it with restrictions. stripes and security threads, for example, with their security elements, can only be attached in a defined, rectangular area. The application of individual patches is associated with high production costs. With the number of security features, the manufacturing effort for the security substrate or the document of value increases.

In addition, with a security substrate with security elements glued on, for example in the form of patches, there is always the risk that these will later become detached from the document of value either in circulation or will be detached with fraudulent intent in order to use them to upgrade counterfeits. Foil elements give banknotes additional protection against counterfeiting, but are also difficult in terms of registering with the printed image and the watermark.

the WO 98/13211 A1 describes as well as the WO 2008/031170 A1 , the EP 2384901 A1 and the WO 2017/055824 A1 a security substrate.

From the WO 2016/096095 A1 a document of value is known which is made up entirely of a film body. The film body consists of two films that are connected to each other via an intermediate layer. The foils each have sub-wavelength structures on the sides facing the intermediate layer. All optical views that are normally generated by printing processes and presented by the document of value are now generated by these sub-wavelength structures. Other image-forming elements, such as printed elements, are deliberately excluded.

The problems and requirements mentioned exist not only with regard to banknotes, ie paper-based or foil-based documents of value, but also with payment transaction cards or identification cards. The Term "Security Substrate" is therefore understood here to include sheet-like security substrates, such as precursors for printing banknotes, cheques, etc., as well as comparatively rigid security substrates, e.g. B. precursors for security, ID or payment cards.

The invention is based on the object of creating a security substrate and a document of value in which film-based security elements can be easily combined with security elements that are generated by displaying images etc. with the greatest possible freedom of design, without producibility becoming more difficult. At the same time, a particularly good coloration of the appearance should be achieved.

The invention is defined in independent claims 1, 2 and 15. The dependent claims relate to advantageous developments of the invention.

The security substrate has a front and a back. It covers a certain area in plan view. It has a first carrier film which extends over at least 50%, preferably over 75% or 100% of this area. A first, essentially opaque layer is arranged over the first carrier film and covers at least 25%, preferably more than 50% and particularly preferably more than 75% of the specific area. A first print acceptance layer is arranged over this first opaque layer, on which a first, colored printing element is preferably formed. A first relief structure is arranged between the first opaque layer and the first carrier film. It is provided with a first reflection-increasing coating, which brings about a first optically variable effect together with the first relief structure or alone.

As an alternative to this, the first essentially opaque layer can also be omitted and the first pressure acceptance layer can have an opacity. In this case, a first print acceptance layer is arranged over the first carrier film, which is essentially opaque and covers at least 25%, preferably more than 50% and particularly preferably more than 75% of the specific area and on which a first, colored printing element is preferably formed . A first relief structure is arranged between the first print acceptance layer and the first carrier film. It is provided with a first reflection-increasing coating, which brings about a first optically variable effect together with the first relief structure or alone.

The term "opaque" means an opacity of at least 50%, preferably 75% or more.

In a development, the first opaque layer or first print acceptance layer is arranged on a second carrier film, which lies between the first opaque layer or first print acceptance layer and the first relief structure. This makes it easier to produce, since the first opaque layer or first print acceptance layer is applied to the second carrier film and then connected to the first carrier film on which the first relief structure is formed, for example by lamination. Of course, this then happens in such a way that the first relief structure lies between the first opaque layer or first print acceptance layer and the first carrier film on which the first relief structure is located. As a result, the second carrier film lies between the first opaque layer or first print acceptance layer and the first relief structure.

A second essentially opaque layer is provided on the side of the first relief structure opposite the first opaque layer or first pressure acceptance layer. A second print acceptance layer is then also provided on this side, on which a second, colored printing element is formed.

In this way there are several possible executions. The security substrate can be made from a single film with embossing of the first relief structure and embedding in protective lacquer. It is equally possible to laminate the first and the second carrier film to one another. A three-foil structure, of which the middle one is then the first carrier foil with the first relief structure, is equally possible.

The relief structure can be embossed on one side of the carrier film. It is equally possible to emboss on both sides, ie to provide a second relief structure with a second reflection-increasing coating on the other side of the first carrier film, so that there is a coated relief structure on both sides of the carrier film in an embossing lacquer applied accordingly.

The security substrate can be purely film-based. Equally, however, a combination with paper is also possible. A paper layer can be used as the core, on the surfaces of which the foils are applied over the entire surface, one of the foils then being the first carrier foil. Of course, foils applied to both sides of the paper core can also have relief structures. Then the already mentioned second relief structure is provided. An inversion of this structure is possible to the extent that the carrier film, which has the first (and possibly also the second) relief structure carries, paper layers are applied as the core. This can be done by lamination.

With regard to the reflection-increasing coating, metallizations such as aluminum, gold, silver, chromium, Cr-Al, Cr-Al-Cr or alloys, e.g. B. Cu-Al in question. Likewise, so-called color-shift or color-change coatings are possible, ie layer sequences made of metal-dielectric-metal. Another option is semi-transparent metallization to only partially cover the colored print elements, or metal pigment inks or flakes. The relief structure, which is usually produced by embossing, can then be metalized using printing technology.

The reflection-increasing coating can be structured laterally. This is commonly referred to as demetallization and is done to reveal underlying effect or print elements. A large number of means are known to the person skilled in the art for demetallization, for example so-called wash ink printing, etching techniques, metal transfer processes, printing with an oil film before vaporization, etc. The appearance of a watermark can be produced by the lateral structuring of the opacity of the reflection-increasing coating.

A wide variety of metal pigment colors or flakes, translucent colors, fluorine colors, structural or binary colors in the form of nanostructures, etc. can be used for the colored printing element. The print acceptance layer can be an opaque white or a semi-transparent or fully transparent ink acceptance layer.

If, as already mentioned above, a combination with paper layers is carried out, a low grammage can be particularly preferred can be selected in order to locally vary the transparency of the paper portion. In this way, embossed optical effects can be made visible through the paper - again a watermark appearance is obtained. As already mentioned above, gaps are also possible in the paper. This can be done by a laser cut etc. Another option is to use colored mottled fibers.

The relief structure can realize the optically variable effect using a wide variety of known techniques. Examples are hologram structures, nanostructures, micromirrors, blazed gratings, sawtooth structures, microstructures, microfocusing elements such as lenses, Fresnel lenses, concave mirrors, Fresnel concave mirrors, pinhole and slit diaphragms, each in combination with microstructures to create modulo mapper or moiré -Magnifier structures. Microfocusing elements are of particular interest in connection with two- or multi-layer foils, since the thicker composite structures then allow longer focal lengths and optical effect and printing elements can interact better with the microfocusing elements.

According to a preferred embodiment, the micromirrors can be arranged in the z-direction at different height levels, as is particularly evident from FIG DE 102018005474 A1 , DE 102018005447 A1 or DE 102018005454 A1 is known.

If foils are laminated to one another or foils to paper or paper to one another, customary laminating adhesives can be used. Equally, colored and/or semi-transparent laminating adhesives are possible, or laminating adhesives that contain fluorescence effects, OVI, metal flakes, etc. realize. A lamination without adhesive is equally possible, for example by melting under pressure or temperature.

The security elements formed on the security substrate by the options mentioned above can be arbitrarily distributed over the entire security substrate. This also makes it possible to design particularly individual security features, since the arbitrary distribution of the security elements that has now been achieved was not possible in the prior art.

When laminating film layers, the printed image, i.e. the colored printing elements and/or the print acceptance layer, can be aligned inwards, which is of course expedient in the case of multi-layer structures. A bare film surface can then be obtained as the outside of the security substrate, so that the security features are particularly well protected. This leads to a high resistance to circulation.

Furthermore, completely transparent or partially transparent windows can also be realized, for example via demetallized areas, in the relief structure and/or the reflection-increasing coating and/or the opaque layer. These windows can also be provided with semi-transparent color shift coatings etc. In addition, it is possible to apply different vaporizations in an overlapping manner in order to create different optical impressions from the front and back, for example different primary colors.

The machine readability of the security substrate can be improved by applying or introducing conductive materials.

The security substrate can be produced both in the known sheet-fed banknote printing, as has been the case up to now, and in printing roll-to-roll. With the latter method, the colored print element is printed onto the already laminated end product or onto the foils to be laminated together.

In particular, it is provided to form a window in the first opaque layer or first print acceptance layer and/or the second opaque layer - if the latter is present - so that the security substrate becomes at least partially transparent in the area of the window or the relief structure with the reflection-increasing coating through the window is visible in the opaque layer or the first print acceptance layer. A see-through security feature is obtained if windows are applied one on top of the other in two opaque layers or a print acceptance layer and an opaque layer. The first opaque layer or first print acceptance layer and—if present—the second opaque layer can each be formed as a white layer, in particular as an opaque white layer.

Various embossing processes can be used to produce the relief structure. In particular, an embossing layer is provided on the carrier film for this purpose. The relief structure can also be designed in sections as a sub-wavelength structure and have a periodicity of 150 nm to 500 nm there or be configured aperiodically with a structure width of 150 nm to 500 nm.

A laterally structured opacity is preferred for the opaque layer or print acceptance layer and/or the reflection-increasing coating, so that a light/dark representation is visible when viewed through transmitted light. This, of course, applies to any opaque layers and anti-reflective coatings that may be provided.

In addition, a further layer with laterally structured opacity is provided between the first opaque layer or first pressure acceptance layer and the second opaque layer. This can be the anti-reflective coating itself, which has gaps or recesses.

In addition, each opaque layer can also be in the form of a further print acceptance layer, so that additional print images are possible, even on the inside of the security substrate.

A translucent colored ink can be printed above or below the reflection-increasing coating, so that the optically variable effect is influenced with regard to its color impression.

A tactile embossing can be formed on the outside of the security substrate, preferably in the form of a steel intaglio print.

Each of the colored printing elements provided can be applied at least in regions over the relief structure and the reflection-increasing coating in such a way that the optically variable effect appears in a color influenced by the colored printing element.

Within the scope of the invention, of course, a document of value is also provided which was produced from a security substrate of the type described and is individualized by printing on one of the print acceptance layers provided, in particular by a printed serial number etc.

For the purposes of this description, metallization means a coating that consists of metal or that contains metal. Also is one Layer structure possible, consisting of a composite layer that has metal inclusions. However, it can also consist of a multi-layer structure in which one or more layers are metallic.

Embossing processes, in particular direct exposure techniques, e.g. B. with the help of a laser writer in question. The original of the embossed structure is written into a substrate coated with photoresist by direct exposure using a laser writer, and the exposed portion of the photoresist is then removed. More complex processes for original production such as electron beam or "Focused Ion Beam" exposure processes allow a particularly fine design of the embossing structure. The original exposed in this way can then be galvanically molded and thus an embossing stamp can be produced as a master, with which an embossing cylinder for embossing a foil web is produced "Ultimately, the structure is replicated via an embossing process, for example in UV varnish on the foil, or directly (e.g. by hot embossing into the surface of the foil). Alternatively, a nanoimprint process can be used. The embossed foil surface is then metallised, e.g e.g. with a reflection layer and/or a structure causing a color effect, e.g. an interference layer structure, and/or a colored layer, e.g. a color-fix coating vacuum in question the film is laminated together with the intermediate layer.

It goes without saying that the features mentioned above and those still to be explained below can be used not only in the specified combinations, but also in other combinations or on their own, without departing from the scope of the present invention.

Fig. 1

eine Draufsicht auf eine Banknote,

Fig. 2 und 3

Schnittdarstellungen für verschiedene Ausführungsformen für das Sicherheitssubstrat, aus dem die Banknote der Fig. 1 hergestellt ist, und

Fig. 4 und 5

Vorder- und Rückseitenansicht einer weiteren Banknote.

The invention is explained in more detail below by way of example with reference to the accompanying drawings, which also disclose features that are essential to the invention. Show it:

1

a top view of a banknote,

Figures 2 and 3

Sectional views for various embodiments for the security substrate from which the banknote of 1 is made, and

Figures 4 and 5

Front and back view of another banknote.

1 shows schematically a bank note 1 which is surface-structured over its entire surface with an embossing structure and is composed of a substrate body 2 which implements a security substrate and has a height H and a width B. The substrate body 2 thus covers, in plan view, the 1 is shown, a certain area. He is in a first embodiment, the sectional view of 2 shows constructed from a sheet covering the same area. These and other variants for the structure of the substrate body are explained below with reference to the other figures.

In 1 it can be seen that the banknote 1, which is an example of a document of value, is presented to a viewer from the front, which in 1 is shown, provides a representation 3 as is customary for banknotes. The representation 3 can include, for example, a graphically designed background 4, a moiré image 5, a hologram 6, a value indication 7 and a serial number 8. It is also possible to provide a window 9 in which the bank note is partially transparent. In window 9, for example, see-through effects present, ie a motif visible on the front complements a motif visible on the back when viewed through to form a further motif.

The substrate body 2 with the height H and the width B is made up of at least one first carrier film of the same or smaller dimensions. In the embodiments, the carrier film covers at least 50% of the specific area, preferably the entire area.

The sectional views of figures 2 and 3 differ with regard to the embodiment of the substrate body 2. They have in common that a relief structure is provided. In the embodiments of 3 includes the substrate body 2 multiple carrier films, in the embodiment of 2 a carrier film.

The substrate body 2 has a first (and in the embodiment of 2 also single) carrier film 10 on which a first relief structure 11 is formed in a suitable (not shown) embossing lacquer layer. This can be embodied as a microstructure 12, for example as a diffractive hologram structure, as a subwavelength structure 13 and/or as a micromirror structure 14. how 2 shows, different types of structures can be used in the relief structure 11 . The structures are provided with a reflection-increasing coating 15 on their upper side. An opaque layer 17 is arranged over the reflection-increasing coating 15 by means of a leveling intermediate layer, for example in the form of a lamination 16 , on which a pressure acceptance layer 18 is implemented. A colored printing element 19 is printed on this.

3 shows an embodiment with substrate body 2 made of several carrier foils. Here the opaque layer 17 is located on a second carrier film 20 which lies between the first relief structure 11 and the opaque layer 17 . The lamination 16 is not only provided here over the first relief structure 11, but also on the underside of the first carrier film 10, since a third carrier film 21 is optionally provided here on the underside of the first carrier film 10, which on its underside, i.e. that of the side facing away from the first relief structure 11, a second opaque layer 22 and a second pressure acceptance layer 23 for a (in 3 not shown) second colored printing element. The use of additional carrier foils facilitates production, since the first relief structure 11, the first and second opaque layers 17, 22 and the print acceptance layer 18, 23 are each produced on their own carrier foils and then in the direction of the symbolically in 3 Registered arrows are joined by the lamination 16.

A second, reflection-increasingly coated relief structure is optionally formed on the underside of the first carrier film 10 or on the upper side of the third carrier film 21 . For them, what was said about the first relief structure applies analogously.

3 shows another optional feature, namely that windows 24 can be provided in the first and second opaque layer 17, 22 as well as pressure acceptance layer 18, 23, the mode of action of which has already been explained in the general part of the description. You can, other than in 3 shown, are also formed at an identical lateral position. In the embodiments, the pressure acceptance layer can also be combined with the opaque layer.

the Figures 4 and 5 show exemplary designs for a substrate body 2 once from the front ( 4 ) and once from the back ( figure 5 ). Here, reference number 25 designates a security feature with micromirrors in a window design, reference number 26 superficial micromirror effects, reference number 27 relief structures producing hologram effects, and reference number 28 glazing colors on a micromirror structure as a relief structure. Also provided on the front side is the first print acceptance layer 18, on which a first colored printing element 29 is formed, essentially covering the entire front side here.

figure 5 shows the rear view, corresponding to the bottom in 3 . In addition to the in 3 The elements shown are located on the back of the first carrier film 10, a further, second relief structure with a reflection-increasing coating, so that the micromirror structures are also present on the back. The transparent window 30 that can already be seen on the front can of course also be seen on the back. The second relief structure, which is formed on the rear side of the carrier film 10, also includes holograms 31, and a colored printing element 32 is also applied to the lower print acceptance layer 23. Reference numeral 33 designates glazing colors on a micromirror structure as a relief structure.

Although this is a matter of course due to the optical requirements, it should also be pointed out that the carrier films are of course transparent. The same applies to the embossing lacquer coating in which the relief structures are formed.

1. 1. Sicherheitssubstrat für Wertdokumente, wie eine Banknote (1), einen Scheck, eine Kredit- oder sonstige Zahlungskarte, eine Ausweiskarte oder dergleichen, das eine Vorder- und eine Rückseite aufweist, in Draufsicht eine bestimmte Fläche überdeckt und aufweist:
   • eine erste Trägerfolie (10), die sich über mind. 50 % der bestimmten Fläche erstreckt,
   • eine über der ersten Trägerfolie (10) angeordnete, im Wesentlichen opake Schicht (17), die mindestens 25 %, bevorzugt mehr als 50 % und besonders bevorzugt mehr als 75 % der bestimmten Fläche bedeckt,
   • eine erste, über der opaken Schicht (17) angeordnete Druckannahmeschicht (18) und
   • mindestens eine Reliefstruktur (14,15), die zwischen der ersten opaken Schicht (17) und der ersten Trägerfolie (10) angeordnet und mit einer reflexionserhöhenden Beschichtung (15) versehen ist, welche zusammen mit der Reliefstruktur (11) oder alleine einen optisch-variablen Effekt bewirkt.
2. 2. Sicherheitssubstrat für Wertdokumente, wie eine Banknote (1), einen Scheck, eine Kredit- oder sonstige Zahlungskarte, eine Ausweiskarte oder dergleichen, das eine Vorder- und eine Rückseite aufweist, in Draufsicht eine bestimmte Fläche überdeckt und aufweist:
   • eine erste Trägerfolie (10), die sich über mind. 50 % der bestimmten Fläche erstreckt,
   • eine erste, über der ersten Trägerfolie (10) angeordnete erste Druckannahmeschicht (18), die im Wesentlichen opak ist und mindestens 25 %, bevorzugt mehr als 50 % und besonders bevorzugt mehr als 75 % der bestimmten Fläche bedeckt, und
   • mindestens eine Reliefstruktur (14,15), die zwischen der ersten Druckannahmeschicht (18) und der ersten Trägerfolie (10) angeordnet und
   mit einer reflexionserhöhenden Beschichtung (15) versehen ist, welche zusammen mit der Reliefstruktur (11) oder alleine einen optisch-variablen Effekt bewirkt.
3. 3. Sicherheitssubstrat nach Nummer 1 oder 2, wobei auf der ersten Druckannahmeschicht (18) mind. ein erstes farbiges Druckelement (29) aufgebracht ist.
4. 4. Sicherheitssubstrat nach einer der Nummern 1 bis 3, wobei die erste opake Schicht (17) bzw. erste Druckannahmeschicht (18) auf einer zweiten Trägerfolie (20) angeordnet ist, die zwischen der ersten opaken Schicht (17) bzw. ersten Druckannahmeschicht (18) und der Reliefstruktur (11) liegt.
5. 5. Sicherheitssubstrat nach einer der Nummern 1 bis 4, wobei eine zweite im Wesentlichen opake Schicht (22) auf einer der ersten opaken Schicht (17) bzw. der ersten Druckannahmeschicht (18) gegenüberliegenden Seite der Reliefstruktur (11) angeordnet ist und auf dieser Seite auch eine zweite Druckannahmeschicht (23) und ein darauf aufgebrachtes zweites farbiges Druckelement (32) ausgebildet ist.
6. 6. Sicherheitssubstrat nach einer der Nummern 1 bis 5, wobei ein Fenster (24) in der ersten opaken Schicht (17) bzw. ersten Druckannahmeschicht (18) und/oder der zweiten opaken Schicht (22) - soweit letztere vorhanden ist - ausgebildet ist, so dass das Sicherheitssubstrat im Bereich des Fensters (24) transparent wird oder die Reliefstruktur (11) mit der reflexionserhöhenden Beschichtung (15) durch das Fenster (24) in der opaken Schicht (17, 22) bzw. ersten Druckannahmeschicht (18) sichtbar ist.
7. 7. Sicherheitssubstrat nach einer der Nummern 1 bis 6, jeweils in Verbindung mit Anspruch 2, wobei die Fenster (24) in der ersten und in der zweiten opaken Schicht (17, 22) bzw. ersten Druckannahmeschicht (18) in Draufsicht mindestens teilweise überlappen.
8. 8. Sicherheitssubstrat nach einer der Nummern 1 bis 7, wobei die erste opake Schicht (17) bzw. erste Druckannahmeschicht (18) und/oder die zweite opake Schicht (22) - soweit letztere vorhanden ist - eine weiße Schicht ist.
9. 9. Sicherheitssubstrat nach einer der Nummern 1 bis 8, dadurch gekennzeichnet, dass die Reliefstruktur (11) in Abschnitten als Subwellenlängenstruktur (13) ausgebildet ist und dort eine Periodizität von 150 nm bis 500 nm hat oder dort aperiodisch mit einer Strukturweite von 150 nm bis 500 nm ausgebildet ist.
10. 10. Sicherheitssubstrat nach einer der Nummern 1 bis 9, wobei die erste opake Schicht (17) bzw. erste Druckannahmeschicht (18) und/oder die zweite opake Schicht (22) - soweit letztere vorhanden ist - eine lateral strukturierte Opazität hat, so dass bei Durchlichtbetrachtung eine Hell/Dunkel-Darstellung sichtbar ist.
11. 11. Sicherheitssubstrat nach einer der Nummern 1 bis 10, jeweils in Verbindung mit Anspruch 2, wobei zwischen der ersten opaken Schicht (17) bzw. ersten Druckannahmeschicht (18) und der zweiten opaken Schicht (22) eine weitere Schicht mit lateral strukturierter Opazität angeordnet ist, so dass bei Durchlichtbetrachtung eine Hell/Dunkel-Darstellung sichtbar ist.
12. 12. Sicherheitssubstrat nach Nummer 11, wobei die weitere Schicht durch die reflexionserhöhende Beschichtung (15) gebildet ist, die mit Lücken oder Aussparungen zur lateral strukturierten Opazitätsvariation versehen ist.
13. 13. Sicherheitssubstrat nach einer der Nummern 1 bis 12, wobei die erste opake Schicht (17) bzw. erste Druckannahmeschicht (18) und/oder die zweite opake Schicht (22) - soweit letztere vorhanden ist - als weitere Druckannahmeschicht (23) ausgebildet ist.
14. 14. Sicherheitssubstrat nach einer der Nummern 1 bis 13, wobei über oder unter der reflexionserhöhenden Beschichtung (15) eine lasierende Buntfarbe (28) gedruckt ist, die einen Farbeindruck des optisch variablen Effekts beeinflusst.
15. 15. Sicherheitssubstrat nach einer der Nummern 1 bis 14, wobei auf einer Außenseite eine fühlbare Verprägung ausgebildet ist, bevorzugt in Form eines Stahlstich-Druckes.
16. 16. Sicherheitssubstrat nach einer der Nummern 1 bis 15, wobei das erste farbige Druckelement (29) und/oder das zweite farbige Druckelement (32) - soweit letzteres vorhanden ist - zumindest bereichsweise über der Reliefstruktur (11) und der reflexionserhöhenden Beschichtung (15) angebracht ist, so dass der optisch variable Effekt in einer durch das Druckelement (19) beeinflussten Farbigkeit erscheint.
17. 17. Wertdokument mit einem Sicherheitssubstrat nach einer der Nummern 1 bis 16, wobei das Wertdokument durch einen Druck auf die erste Druckannahmeschicht (18) und/oder die zweite Druckannahmeschicht (23) - soweit letztere vorhanden ist - individualisiert ist, insbesondere eine gedruckte Seriennummer (8).

Bezugszeichenliste 1 Banknote 23 zweite Druckannahmeschicht 2 Substratkörper 24 Fenster 3 Darstellung 25 Sicherheitsmerkmal mit Mikrospiegeln 4 Hintergrund 26 Mikrospiegeleffekte 5 Moire-Bild 27 Hologrammeffekte erzeugende Reliefstrukturen 6 Hologramm 28 lasierende Farben 7 Wertangabe 29 erstes farbiges Druckelement 8 Seriennummer 30 durchsichtiges Fenster 9 Fenster 31 Hologramme 10 erste Trägerfolie 32 zweites farbiges Druckelement 11 erste Reliefstruktur 33 lasierende Farben 12 Mikrostruktur 13 Subwellenlängenstruktur 14 Mikrospiegelstruktur 15 reflexionserhöhende Beschichtung 16 Kaschierung 17 erste opake Schicht 18 Druckannahmeschicht 19 farbiges Druckelement 20 zweite Trägerfolie 21 dritte Trägerfolie 22 zweite opake Schicht For example, the invention can also be characterized as follows:

1. 1. Security substrate for documents of value, such as a bank note (1), a check, a credit or other payment card, an identity card or the like, which has a front and a back, covers a certain area in plan view and has:
   • a first carrier film (10) which extends over at least 50% of the specified area,
   • an essentially opaque layer (17) arranged over the first carrier film (10) and covering at least 25%, preferably more than 50% and particularly preferably more than 75% of the specific area,
   • a first print acceptance layer (18) disposed over the opaque layer (17) and
   • at least one relief structure (14,15) which is arranged between the first opaque layer (17) and the first carrier film (10) and is provided with a reflection-increasing coating (15) which, together with the relief structure (11) or alone, has an optically variable effect.
2. 2. Security substrate for documents of value, such as a bank note (1), a check, a credit or other payment card, an ID card or the like, which has a front and a back, covers a certain area in plan view and has:
   • a first carrier film (10) which extends over at least 50% of the specified area,
   • a first pressure acceptance layer (18) arranged over the first carrier film (10) which is essentially opaque and covers at least 25%, preferably more than 50% and particularly preferably more than 75% of the given area, and
   • at least one relief structure (14,15) which is arranged between the first print acceptance layer (18) and the first carrier film (10) and
   is provided with a reflection-increasing coating (15), which causes an optically variable effect together with the relief structure (11) or alone.
3. 3. Security substrate according to number 1 or 2, wherein at least one first colored printing element (29) is applied to the first print acceptance layer (18).
4. 4. Security substrate according to one of numbers 1 to 3, wherein the first opaque layer (17) or first pressure acceptance layer (18) is arranged on a second carrier film (20) which is located between the first opaque layer (17) or first pressure acceptance layer ( 18) and the relief structure (11).
5. 5. Security substrate according to one of numbers 1 to 4, wherein a second substantially opaque layer (22) is arranged on a side of the relief structure (11) opposite the first opaque layer (17) or the first print acceptance layer (18) and on this Side also a second pressure receiving layer (23) and applied thereto a second colored printing element (32) is formed.
6. 6. Security substrate according to one of numbers 1 to 5, wherein a window (24) is formed in the first opaque layer (17) or first print acceptance layer (18) and/or the second opaque layer (22) - if the latter is present , so that the security substrate becomes transparent in the area of the window (24) or the relief structure (11) with the reflection-increasing coating (15) is visible through the window (24) in the opaque layer (17, 22) or the first print acceptance layer (18). is.
7. 7. Security substrate according to one of numbers 1 to 6, in each case in connection with claim 2, wherein the windows (24) in the first and in the second opaque layer (17, 22) or first pressure acceptance layer (18) at least partially overlap in plan view .
8. 8. Security substrate according to one of numbers 1 to 7, wherein the first opaque layer (17) or first print acceptance layer (18) and/or the second opaque layer (22) - if the latter is present - is a white layer.
9. 9. Security substrate according to one of numbers 1 to 8, characterized in that the relief structure (11) is formed in sections as a sub-wavelength structure (13) and has a periodicity of 150 nm to 500 nm there or is aperiodic there with a structure width of 150 nm to 500 nm is formed.
10. 10. Security substrate according to one of numbers 1 to 9, wherein the first opaque layer (17) or first pressure acceptance layer (18) and/or the second opaque layer (22) - if the latter is present - has a laterally structured opacity, so that a light/dark representation is visible when viewed through transmitted light.
11. 11. Security substrate according to one of numbers 1 to 10, in each case in conjunction with claim 2, wherein a further layer with laterally structured opacity is arranged between the first opaque layer (17) or first pressure acceptance layer (18) and the second opaque layer (22). is, so that a light/dark representation is visible when viewed through transmitted light.
12. 12. Security substrate according to number 11, wherein the further layer is formed by the reflection-increasing coating (15), which is provided with gaps or recesses for laterally structured opacity variation.
13. 13. Security substrate according to one of numbers 1 to 12, wherein the first opaque layer (17) or first pressure acceptance layer (18) and/or the second opaque layer (22) - if the latter is present - is designed as a further pressure acceptance layer (23). .
14. 14. Security substrate according to one of numbers 1 to 13, wherein a translucent colored ink (28) is printed above or below the reflection-increasing coating (15), which influences a color impression of the optically variable effect.
15. 15. Security substrate according to one of numbers 1 to 14, wherein a tactile embossing is formed on an outside, preferably in the form of a steel engraved print.
16. 16. Security substrate according to one of numbers 1 to 15, wherein the first colored printing element (29) and/or the second colored printing element (32) - if the latter is present - at least in regions over the relief structure (11) and the reflection-increasing coating (15) is attached, so that the optically variable effect appears in a color influenced by the printing element (19).
17. 17. Document of value with a security substrate according to one of numbers 1 to 16, wherein the document of value by printing on the first print acceptance layer (18) and/or the second print acceptance layer (23) - if the latter is available - is individualized, in particular a printed serial number (8).

<u>Reference List</u> 1 bank note 23 second pressure acceptance layer 2 substrate body 24 window 3 depiction 25 Security feature with micromirrors 4 background 26 micromirror effects 5 Moire image 27 Relief structures producing hologram effects 6 hologram 28 translucent colors 7 indication of value 29 first colored printing element 8th serial number 30 transparent window 9 window 31 holograms 10 first carrier film 32 second colored print element 11 first relief structure 33 translucent colors 12 microstructure 13 sub-wavelength structure 14 micromirror structure 15 anti-reflective coating 16 lamination 17 first opaque layer 18 pressure acceptance layer 19 colored print element 20 second carrier foil 21 third carrier film 22 second opaque layer

Claims (15)

Security substrate for documents of value, such as a bank note (1), a check, a credit or other payment card, an identity card or the like, which has a front and a back, covers a specific area in plan view and has: - a first carrier film (10) which extends over at least 50% of the specified area, - an essentially opaque layer (17) arranged over the first carrier film (10) and covering at least 25%, preferably more than 50% and particularly preferably more than 75% of the specific area, - a first pressure acceptance layer (18) arranged over the opaque layer (17) and - At least one relief structure (14, 15), which is arranged between the first opaque layer (17) and the first carrier film (10) and is provided with a reflection-increasing coating (15), which together with the relief structure (11) or alone an optically -variable effect causes characterized in that a second essentially opaque layer (22) is arranged on a side of the relief structure (11) opposite the first opaque layer (17) and a second print acceptance layer (23) and a second colored printing element (32) applied thereto are also formed on this side , and a further layer with laterally structured opacity is arranged between the first opaque layer (17) and the second opaque layer (22), so that a light/dark representation is visible when viewed through transmitted light. Security substrate for documents of value, such as a bank note (1), a check, a credit or other payment card, an identity card or the like, which has a front and a back, covers a specific area in plan view and has: - a first carrier film (10) which extends over at least 50% of the specified area, - a first pressure acceptance layer (18) arranged over the first carrier film (10), which is essentially opaque and covers at least 25%, preferably more than 50% and particularly preferably more than 75% of the determined area, and - At least one relief structure (14, 15) which is arranged between the first print acceptance layer (18) and the first carrier film (10) and is provided with a reflection-increasing coating (15) which, together with the relief structure (11) or alone, has an optical causes variable effect, characterized in that a second, essentially opaque layer (22) is arranged on a side of the relief structure (11) opposite the first print acceptance layer (18) and a second print acceptance layer (23) and a second colored printing element (32) applied thereto are also formed on this side, and A further layer with laterally structured opacity is arranged between the first print acceptance layer (18) and the second opaque layer (22), so that a light/dark representation is visible when viewed through transmitted light. Security substrate according to Claim 1 or 2, characterized in that the further layer is formed by the reflection-increasing coating (15), which is provided with gaps or recesses for laterally structured opacity variation. Security substrate according to Claim 1 or 2, characterized in that at least one first colored printing element (29) is applied to the first print acceptance layer (18). Security substrate according to one of Claims 1 to 4, characterized in that the first opaque layer (17) or first pressure acceptance layer (18) is arranged on a second carrier film (20) which lies between the first opaque layer (17) or first pressure acceptance layer (18) and the relief structure (11). Security substrate according to one of claims 1 to 5, wherein a window (24) is formed in the first opaque layer (17) or first pressure acceptance layer (18) and/or the second opaque layer (22) - if the latter is present - see above that the security substrate becomes transparent in the area of the window (24) or the relief structure (11) with the reflection-increasing coating (15) is visible through the window (24) in the opaque layer (17, 22) or the first print acceptance layer (18). Security substrate according to Claim 6, characterized in that the windows (24) in the first and in the second opaque layer (17, 22) or first pressure acceptance layer (18) overlap at least partially in plan view. Security substrate according to one of claims 1 to 7, wherein the first opaque layer (17) or first print acceptance layer (18) and/or the second opaque layer (22) - if the latter is present - is a white layer. Security substrate according to one of Claims 1 to 8, characterized in that the relief structure (11) is formed in sections as a sub-wavelength structure (13) and has a periodicity of 150 nm to 500 nm there or is aperiodic there with a structure width of 150 nm to 500 nm is trained. Security substrate according to one of claims 1 to 9, wherein the first opaque layer (17) or first pressure acceptance layer (18) and / or the second opaque layer (22) - if the latter is present - has a laterally structured opacity, so that when viewed through transmitted light a light/dark representation is visible. Security substrate according to one of claims 1 to 10, wherein the first opaque layer (17) or first pressure acceptance layer (18) and/or the second opaque layer (22) - if the latter is present - is formed as a further pressure acceptance layer (23). Security substrate according to one of Claims 1 to 11, in which a translucent colored ink (28) is printed above or below the reflection-increasing coating (15) and influences a color impression of the optically variable effect. Security substrate according to one of claims 1 to 12, wherein a tactile embossing is formed on an outer side, preferably in the form of a steel intaglio print. Security substrate according to one of claims 1 to 13, wherein the first colored printing element (29) and/or the second colored printing element (32) - if the latter is present - is applied at least in regions over the relief structure (11) and the reflection-increasing coating (15). , so that the optically variable effect appears in a color influenced by the printing element (19). Document of value with a security substrate according to one of claims 1 to 14, wherein the document of value is individualized by printing on the first print acceptance layer (18) and/or the second print acceptance layer (23) - if the latter is present - in particular a printed serial number (8) .

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