EP2196321B1 - Transparent security feature - Google Patents

Transparent security feature Download PDF

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Publication number
EP2196321B1
EP2196321B1 EP09014878.4A EP09014878A EP2196321B1 EP 2196321 B1 EP2196321 B1 EP 2196321B1 EP 09014878 A EP09014878 A EP 09014878A EP 2196321 B1 EP2196321 B1 EP 2196321B1
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Prior art keywords
layer
security element
element according
transparent layer
transparent
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German (de)
French (fr)
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EP2196321A2 (en
EP2196321A3 (en
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Klaus Dr. Schmidegg
Jürgen Dr. Keplinger
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Hueck Folien GmbH
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Hueck Folien GmbH
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/373—Metallic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D25/465—Associating two or more layers using chemicals or adhesives
    • B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives
    • B42D2035/24—

Definitions

  • a transparent layer with a high refractive index is applied on the carrier substrate. This layer can be applied over the entire surface or partially.
  • the thickness of the HRI layer is preferably about 30-100 nm, but also higher or lower layer thicknesses are possible.
  • the cluster layer can be applied over the entire surface or partially.
  • the described layer structure can also be laminated against a further carrier substrate.

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  • General Chemical & Material Sciences (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Business, Economics & Management (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)
  • Credit Cards Or The Like (AREA)

Description

Die Erfindung betrifft transparente Sicherheitselemente, die einen Farbkippeffekt, bewirkt durch metallische Cluster, die über eine definierte transparente Schicht von einer Schicht mit hohem Brechungsindex getrennt sind, aufweisen.The invention relates to transparent security elements which have a color shift effect, caused by metallic clusters which are separated by a defined transparent layer from a layer with a high refractive index.

Aus WO 02/18155 ist ein Verfahren zur fälschungssicheren Markierung von Gegenständen bekannt, wobei der Gegenstand mit einer Markierung bestehend aus einer elektromagnetische Wellen reflektierenden ersten Schicht auf die eine für elektromagnetische Wellen durchlässige inerte Schicht mit einer definierten Dicke aufgebracht wird, worauf auf diese inerte Schicht eine aus metallischen Clustern gebildet dritte Schicht folgt, versehen wird.Out WO 02/18155 a method for the counterfeit-proof marking of objects is known, wherein the article is applied with a mark consisting of an electromagnetic wave reflecting first layer on an electromagnetic wave transmitting inert layer having a defined thickness, whereupon said inert layer is formed of metallic clusters third layer follows, is provided.

Aus EP 1 716 007 A ist ein fälschungssicheres Sicherheitselement bestehend aus jeweils mindestens einer elektromagnetische Wellen reflektierenden Schicht, einer polymeren Abstandsschicht und einer Schicht gebildet von metallischen Clustern, wobei eine oder mehrere der Schichten zusätzlich zu ihrer Funktion im Farbkippeffekt-Setup weitere Sicherheitsfunktionen erfüllen, bekannt.Out EP 1 716 007 A is a tamper-proof security element consisting of at least one electromagnetic wave reflecting layer, a polymeric spacer layer and a layer formed by metallic clusters, wherein one or more of the layers in addition to their function in Farbkippeffekt setup fulfill other security functions known.

Dabei wird jeweils durch Aufbringung von Clusterschichten, in Kombination mit einer polymeren Abstandschicht und einer metallischen Reflexionsschicht, ein Farbkippeffekt erzeugt.In each case by applying cluster layers, in combination with a polymeric spacer layer and a metallic reflection layer, a color shift effect is generated.

Nachteil dabei ist, dass weitere Elemente oder Sicherheitselemente, wie beispielsweise Fluoreszenzen, Texte, Mikrotexte, Bilder und dergleichen unterhalb der metallischen Reflexionsschicht nicht mehr erkennbar sind.Disadvantage is that other elements or security elements, such as fluorescence, texts, microtes, images and the like below the metallic reflection layer are no longer recognizable.

Aufgabe der Erfindung ist daher ein Sicherheitselement bereitzustellen, das einen Farbkippeffekt aufweist, der auch ohne metallische Reflexionsschicht erkennbar ist und außerdem das darunter liegende Element oder Sicherheitselement, beispielsweise ein Foto, ein Text, ein Mikrotext oder ein fluoreszierendes Merkmal erkennbar ist.The object of the invention is therefore to provide a security element having a color shift effect, which is also recognizable without a metallic reflection layer and also the underlying element or Security element, such as a photo, a text, a microtext or a fluorescent feature is recognizable.

Gegenstand der Erfindung ist daher Sicherheitselement aufweisend ein Trägersubstrat, bestehend aus jeweils mindestens einer ersten Schicht, einer polymeren Abstandsschicht und einer Schicht gebildet von metallischen Clustern, dadurch gekennzeichnet, dass die erste Schicht eine transparente Schicht mit hohem Brechungsindex (HRI-Schicht) ist und die polymere Abstandsschicht einen fluoreszierenden Farbstoff aufweist, wobei die transparente Schicht einen Brechungsindex, der größer ist als der Brechungsindex der Abstandsschicht, aufweist und die transparente Schicht aus einem Metalloxid oder Metallsulfid besteht.The invention therefore relates to a security element having a carrier substrate, each consisting of at least a first layer, a polymeric spacer layer and a layer formed by metallic clusters, characterized in that the first layer is a transparent layer having a high refractive index (HRI layer) and the polymeric spacer layer comprises a fluorescent dye, wherein the transparent layer has a refractive index which is greater than the refractive index of the spacer layer, and the transparent layer consists of a metal oxide or metal sulfide.

Als Trägersubstrat kommen vorzugsweise transparente flexible Kunststofffolien, beispielsweise aus PI, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC in Frage. Die Trägerfolien weisen vorzugsweise eine Dicke von 5 - 700 µm, bevorzugt 5 - 200 µm, besonders bevorzugt 5 - 50 µm auf.The carrier substrate used is preferably transparent flexible plastic films, for example of PI, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC Question. The carrier films preferably have a thickness of 5 to 700 .mu.m, preferably 5 to 200 .mu.m, particularly preferably 5 to 50 .mu.m.

Auf das Trägersubstrat wird eine transparente Schicht mit hohem Brechungsindex aufgebracht. Diese Schicht kann vollflächig oder partiell, aufgebracht werden.On the carrier substrate, a transparent layer with a high refractive index is applied. This layer can be applied over the entire surface or partially.

Diese Schicht weist einen Brechungsindex auf, der höher ist, als der Brechungsindex der Abstandsschicht, vorzugsweise einen Brechungsindex von > 2.0 auf und wird auch als HRI-Schicht (high refractive index - Schicht) bezeichnet.This layer has a refractive index which is higher than the refractive index of the spacer layer, preferably a refractive index of> 2.0, and is also referred to as a high refractive index (HRI) layer.

Dabei kommen beispielsweise im Vakuum aufgedampfte, oder gedruckte oder lackierte transparente Materialien, wie beispielsweise Metalloxide oder Metallsulfide, beispielsweise Ti-oxide , Ta-oxide, Si-oxide oder ZnS in Frage. Zur partiellen Aufbringung eignet sich besonders ein Verfahren unter Verwendung eines löslichen Farbauftrags zur Herstellung der partiellen HRI-Schicht. Dabei wird in einem ersten Schritt auf dem Trägersubstrat ein in einem Lösungsmittel löslicher Farbauftrag aufgebracht, in einem zweiten Schritt diese Schicht gegebenenfalls mittels eines Inline-Plasma-, Corona- oder Flammprozesses behandelt und in einem dritten Schritt eine Schicht des zu strukturierenden Materials in einem Vakuumaufdampfverfahren oder durch Drucken oder durch Lackieren aufgebracht, worauf in einem vierten Schritt der Farbauftrag mittels eines Lösungsmittels, gegebenenfalls kombiniert mit einer mechanischen Einwirkung, entfernt wird.
Der lösliche Farbauftrag erfolgt partiell, die Aufbringung der HRI-Schicht kann vollflächig oder partiell erfolgen.For example, vacuum-deposited, printed or lacquered transparent materials, for example metal oxides or metal sulfides, for example Ti oxides, Ta oxides, Si oxides or ZnS are suitable. For partial application, a method using a soluble paint for producing the partial HRI layer is particularly suitable. In this case, in a first step on the carrier substrate, a soluble in a solvent paint application is applied, in a second step, this layer optionally by means of an inline plasma, corona or Treated flame process and applied in a third step, a layer of the material to be patterned in a vacuum evaporation method or by printing or by painting, and in a fourth step, the paint application by means of a solvent, optionally combined with a mechanical action, is removed.
The soluble paint application takes place partially, the application of the HRI layer can take place over the entire surface or partially.

Die Dicke der HRI- Schicht beträgt vorzugsweise etwa 30-100 nm, wobei aber auch höhere bzw. geringere Schichtdicken möglich sind.The thickness of the HRI layer is preferably about 30-100 nm, but also higher or lower layer thicknesses are possible.

In einer besonderen Ausführungsform kann die partielle transparente Schicht durch eine nicht-transparente Schicht, z.B. durch eine Metallschicht, die vollflächig oder partiell, entweder genau oder partiell deckungsgleich oder versetzt zu der HRI-Schicht aufgebracht ist, ergänzt werden..In a particular embodiment, the partial transparent layer may be defined by a non-transparent layer, e.g. be supplemented by a metal layer, which is applied over the whole area or partially, either exactly or partially congruent or offset to the HRI layer.

Die darauf folgende polymere Abstandschicht bzw. die polymeren Abstandsschichten können ebenfalls vollflächig oder partiell aufgebracht werden. Die polymeren Schichten bestehen beispielsweise aus konventionell oder strahlungshärtenden, insbesondere UV-härtenden, Farb- oder Lacksystemen auf Basis von Nitrocellulose, Epoxy-, Polyester-, Kolophonium-, Acrylat-, Alkyd-, Melamin-, PVA-, PVC-, Isocyanat-, Urethan- oder PS-Copolymersystemen.The following polymeric spacer layer or the polymeric spacer layers can also be applied over the entire surface or partially. The polymeric layers consist for example of conventional or radiation-curing, in particular UV-curing, paint or coating systems based on nitrocellulose, epoxy, polyester, rosin, acrylate, alkyd, melamine, PVA, PVC, isocyanate , Urethane or PS copolymer systems.

Diese polymere Abstandsschicht, ist nach Zusammensetzung in einem bestimmten Spektralbereich fluoreszierend. Gegebenenfalls kann diese Eigenschaft auch durch Beimengung eines geeigneten Chromophors verstärkt werden. Durch die Auswahl verschiedener Chromophore kann ein geeigneter Spektralbereich ausgewählt werden. Dadurch kann neben dem Kippeffekt auch die polymere Schicht zusätzlich maschinenlesbar gestaltet werden. So kann beispielsweise im blauen Spektralbereich (im Bereich von etwa 400 nm) ein gelber AZO-Farbstoff, beispielsweise Anilide, Rodural, Eosin, eingesetzt werden. Der Farbstoff ändert darüber hinaus des Spektrum des Sicherheitsmerkmals in charakteristischer Weise.This polymeric spacer layer is fluorescent upon composition in a particular spectral range. Optionally, this property can also be enhanced by the addition of a suitable chromophore. By choosing different chromophores, a suitable spectral range can be selected. As a result, in addition to the tilting effect, the polymeric layer can additionally be made machine-readable. For example, in blue Spectral region (in the range of about 400 nm) a yellow AZO dye, for example, anilides, rodural, eosin, are used. The dye also changes the spectrum of the security feature in a characteristic manner.

Bei Einsatz eines Fluorophors mit Anregung außerhalb des sichtbaren Bereichs (z. B. im UV) und Abstrahlung im sichtbaren Bereich, läßt sich bei Wahl einer geeigneten Konzentration sogar eine Markierung mit Farbwechsel bei Beleuchtung generieren. Optimalerweise weist dabei der Schichtaufbau bei dem anvisierten Beobachtungswinkel ein Spektrum mit hoher Absorption im Wellenlängenbereich der Emission des Fluorophors auf.When using a fluorophore with excitation outside the visible range (eg in the UV) and radiation in the visible range, can even generate a marker with color change when illuminated by choosing a suitable concentration. Optimally, the layer structure at the targeted viewing angle on a spectrum with high absorption in the wavelength range of the emission of the fluorophore.

In einer besonderen Ausführungsform weist die polymere Abstandsschicht Bereiche unterschiedlicher Dicke auf. Durch definierte Variation der Dicke (Gradient, definierte Stufen, definierte Strukturen) der polymeren Abstandsschicht wird eine Kombination unterschiedlicher Farbkippeffekte in einem fertigen Sicherheitselement erzeugt (Mehrfarbenkippeffekt).In a particular embodiment, the polymeric spacer layer has regions of different thickness. By defined variation of the thickness (gradient, defined steps, defined structures) of the polymeric spacer layer, a combination of different color shift effects is produced in a finished security element (multicolor tilting effect).

Die Dicke der Schicht kann dabei in einem weiten Bereich gezielt variiert werden, beispielsweise in einem Bereich von 10 nm bis 3 µm.The thickness of the layer can be selectively varied within a wide range, for example in a range of 10 nm to 3 microns.

Bei einer Abstandsschichtdicke über ca. 1,5 µm ergibt der Schichtaufbau keine für das menschliche Auge mehr erkennbare Farbe. Das liegt daran, dass das Spektrum mit zunehmender Schichtdicke immer komplexer wird (Multipeak) und nicht mehr aufgelöst werden kann. Für Lesegeräte ist das Spektrum aber weiterhin gut messbar und sogar hoch charakteristisch, wobei die maximal zu vermessende Abstandsschichtdicke vom Auflösungsvermögen des jeweiligen Gerätes abhängt. Dies stellt eine Möglichkeit dar, eine unscheinbare aber maschinenlesbare Markierung zu erzeugen.With a spacer layer thickness of more than about 1.5 μm, the layer structure does not produce any discernible color to the human eye. This is because the spectrum becomes more and more complex with increasing layer thickness (multipeak) and can no longer be resolved. For readers, however, the spectrum is still easy to measure and even highly characteristic, with the maximum distance layer thickness to be measured depending on the resolution of the respective device. This provides a way to create a nondescript but machine-readable mark.

Ferner kann bei der Aufbringung der polymeren Abstandsschicht ein bestimmter definierter Schichtdickenverlauf, entweder in einem Aufbringungsschritt oder durch Aufbringung mehrerer Schichten, die wiederum je nach gewünschtem Schichtdickenverlauf vollflächig bzw. partiell sein kann, eingestellt werden.
Der Schichtdickenverlauf kann auch in Form eines Stufenaufbaus ausgeführt sein, wobei auf eine Basisschicht unterschiedliche Dicken einer weiteren polymeren Schicht partiell aufgebracht werden.
Ferner ist es möglich mehrere Schichten aus unterschiedlichen Polymeren, beispielsweise Polymeren mit unterschiedlichen Brechungsindizes aufzubringen.Furthermore, during the application of the polymeric spacer layer, it is possible to set a specific defined layer thickness profile, either in one application step or by applying a plurality of layers, which in turn can be full-surface or partial depending on the desired layer thickness profile.
The layer thickness profile can also be embodied in the form of a step structure, wherein different thicknesses of a further polymer layer are partially applied to a base layer.
Furthermore, it is possible to apply several layers of different polymers, for example polymers with different refractive indices.

In einer besonderen Ausführungsform kann mindestens eine Schicht der polymeren Abstandsschicht optisch aktive Strukturen, beispielsweise Beugungsgitter, Beugungsstrukturen, Hologramme und dergleichen aufweisen, die in die polymere Abstandsschicht, vorzugsweise vor der vollständigen Aushärtung geprägt werden können. Ein entsprechendes Verfahren ist beispielsweise aus EP -A 1352732 A oder aus EP -A 1310381 bekannt.In a particular embodiment, at least one layer of the polymeric spacer layer may comprise optically active structures, such as diffraction gratings, diffraction structures, holograms, and the like, which may be embossed into the polymeric spacer layer, preferably prior to complete cure. A corresponding method is for example off EP-A 1352732 A or off EP-A 1310381 known.

Üblicherweise weist die polymere Abstandsschicht einen Brechungsindex von ca. 1,3 bis 1,7 auf, jedenfalls aber einen niedrigeren Brechungsindex als die aufgebrachte HRI - Schicht.Usually, the polymeric spacer layer has a refractive index of about 1.3 to 1.7, but in any case a lower refractive index than the applied HRI layer.

Anschließend wird eine Schicht aus metallischen Clustern aufgebracht.
Die metallischen Cluster können beispielsweise aus Aluminium, Gold, Palladium, Platin, Chrom, Silber, Kupfer, Nickel, Tantal, Zinn und dergleichen oder deren Legierungen, wie beispielsweise Au/Pd, Cu/Ni oder Cr/Ni bestehen. Vorzugsweise können auch Clustermaterialien aufgebracht werden, beispielsweise halbleitende Elemente der III. bis VI. Haupt- bzw. der II. Nebengruppe, deren Plasmonenanregung extern (z.B. über Röntgen- oder lonenstrahlung oder elektromagnetische Wechselwirkungen) triggerbar ist. Dadurch wird bei Betrachtung mit einem geeigneten Lesegerät eine Änderung im Farbspektrum (z.B. Intensitätsänderung) bzw. ein Blinken des Farbkippeffekts sichtbar.
Die Clusterschicht kann auch zusätzliche Eigenschaften, beispielsweise elektrisch leitfähige, magnetische oder fluoreszierende Eigenschaften aufweisen. So weist beispielsweise eine Clusterschicht aus Ni, Cr/Ni, Fe bzw. Core-Shell-Strukturen mit diesen Materialien bzw. Mischungen dieser Materialien mit den oben erwähnten Clustermaterialien derartige zusätzliche Merkmale auf.Subsequently, a layer of metallic clusters is applied.
The metallic clusters can consist, for example, of aluminum, gold, palladium, platinum, chromium, silver, copper, nickel, tantalum, tin and the like or their alloys, such as, for example, Au / Pd, Cu / Ni or Cr / Ni. Preferably, cluster materials can also be applied, for example semiconducting elements of III. to VI. Main or the II. Subgroup, whose plasmon excitation externally (eg via X-ray or ion radiation or electromagnetic interactions) can be triggered. This will change when viewed with a suitable reader in the color spectrum (eg intensity change) or a blinking of the color shift effect visible.
The cluster layer may also have additional properties, for example electrically conductive, magnetic or fluorescent properties. For example, a cluster layer of Ni, Cr / Ni, Fe or core-shell structures with these materials or mixtures of these materials with the cluster materials mentioned above has such additional features.

Diese Clusterschicht kann auf bekannte Weise durch Sputtern (beispielsweise lonenstrahl oder Magnetron) oder Verdampfen (thermisch, mittels Elektronenstrahl, aus einer Lösung) oder durch Adsorption aufgebracht werden.This cluster layer can be applied in a known manner by sputtering (for example ion beam or magnetron) or evaporation (thermally, by electron beam, from a solution) or by adsorption.

Die Clusterschicht kann vollflächig oder partiell aufgebracht werden.The cluster layer can be applied over the entire surface or partially.

Aufgrund der transparenten HRI - Schicht ändert sich auch die Farbe winkelabhängig, sodass ein auf beiden Seiten sichtbarer Farbkippeffekt entsteht, dessen Farbänderungen auf der Vorder- und Rückseite des Aufbaus unterschiedlich sein können.Due to the transparent HRI layer, the color also changes depending on the angle, resulting in a visible color shift effect on both sides, whose color changes can be different on the front and back of the setup.

In analoger Weise kann auch ein inverser Setup mit einer Clusterschicht (Aufbringen der Clusterschicht auf das Trägersubstrat, anschließendes Aufbringen der polymeren Abstandsschicht und der HRI-Schicht) hergestellt werden, wobei die Eigenschaften der einzelnen Schichten der vorangehenden Beschreibung entsprechen.In an analogous manner, it is also possible to produce an inverse setup with a cluster layer (application of the cluster layer to the carrier substrate, subsequent application of the polymeric spacer layer and the HRI layer), the properties of the individual layers corresponding to the preceding description.

Der Schichtaufbau kann anschließend gegebenenfalls ein oder beidseitig mit einer Haftvermittlerschicht und einer Klebebeschichtung zur Aufbringung auf ein Substrat versehen werden.
Als Klebeschichtung kommen dabei Heiß- oder Kaltsiegelkleber oder Selbstklebebeschichtungen in Frage.The layer structure can then optionally be provided on one or both sides with a primer layer and an adhesive coating for application to a substrate.
Hot or cold seal adhesives or self-adhesive coatings come into question as the adhesive coating.

Gegebenfalls kann der beschriebene Schichtaufbau auch gegen ein weiteres Trägersubstrat kaschiert werden.Optionally, the described layer structure can also be laminated against a further carrier substrate.

Das Sicherheitselement kann beispielsweise auf ein Substrat aufgebracht werden, das Elemente oder Sicherheitselemente, beispielsweise ein Foto, einen Text, ein fluoreszierendes Merkmal, Graphiken, Bilder, Symbole und dergleichen aufweist.For example, the security element may be applied to a substrate having elements or security elements, such as a photograph, a text, a fluorescent feature, graphics, images, symbols, and the like.

An der Grenzfläche zwischen Abstandsschicht und HRI-Schicht wird nur ein Teil des einfallenden Lichts reflektiert und erzeugt durch Interferenzeffekte einen Farbkippeffekt. Der Anteil des Lichts, der durch die HRI-Schicht transmittiert wird, gelangt zu dem Substrat, auf das das Sicherheitselement aufgebracht ist und durch den Mehrschichtaufbau wieder zum Betrachter zurück. Dadurch bleiben Elemente oder Sicherheitselemente, die auf dem Substrat vorhanden sind, für den Betrachter sichtbar.At the interface between the spacer layer and the HRI layer, only a portion of the incident light is reflected and produces a color shift effect due to interference effects. The portion of the light which is transmitted through the HRI layer returns to the substrate on which the security element is applied and through the multi-layer structure back to the viewer. As a result, elements or security elements that are present on the substrate remain visible to the viewer.

Das erfindungsgemäße Sicherheitselement kann als Laminierfolie, beispielsweise für Wertdokumente, wie Ausweisdokumente, Karten, Banknoten und dergleichen verwendet werden.
Nach Kaschierung mit einem weiteren Trägersubstrat, kann das Sicherheitselement aber auch zur Einbringung in Wertdokumente verwendet werden, wobei der Farbkippeffekt durch eine Aussparung im Wertdokument (Fenster) sichtbar wird. Ist die Aussparung so ausgeführt, dass das Sicherheitselement von beiden Seiten sichtbar ist, kann ein von beiden Seiten unterschiedlicher Farbkippeffekt erkennbar werden.The security element according to the invention can be used as a laminating film, for example for value documents, such as identity documents, cards, banknotes and the like.
After lamination with a further carrier substrate, the security element can also be used for incorporation into value documents, wherein the color shift effect is visible through a recess in the document of value (window). If the recess is made so that the security element is visible from both sides, a different color shift effect can be recognized from both sides.

Claims (9)

  1. Security element comprising a backing substrate, consisting of in each case at least one first layer, one polymeric spacer layer and one layer formed of metallic clusters, characterized in that the first layer is a transparent layer of high refractive index (HRI layer) and the polymeric spacer layer comprises a fluorescent dye, the transparent layer having a refractive index greater than the refractive index of the spacer layer, and the transparent layer consisting of a metal oxide or metal sulphide.
  2. Security element according to Claim 1, characterized in that the transparent layer consists of a metal oxide or metal sulphide applied in a vacuum vapour deposition process.
  3. Security element according to Claim 2, characterized in that the transparent layer consists of ZnS or Ti oxides, Si oxides or Ta oxides.
  4. Security element according to any of Claims 1 to 3, characterized in that the layer of metallic clusters is applied over the full area.
  5. Security element according to any of Claims 1 to 3, characterized in that the layer of metallic clusters is applied partially.
  6. Security element according to any of Claims 1 to 5, characterized in that the transparent layer is applied over the full area.
  7. Security element according to any of Claims 1 to 5, characterized in that the transparent layer is applied partially either exactly or partially congruent or offset relative to the full-area or partial cluster layer.
  8. Security element according to any of Claims 1 to 7, characterized in that it is provided with a single- or double-sided adhesive coating or is laminated to a second backing film.
  9. Use of the security elements according to any of Claims 1 to 8 as laminating film for documents of value or for application to or for at least partial incorporation into documents of value.
EP09014878.4A 2008-12-11 2009-12-01 Transparent security feature Active EP2196321B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0192608A AT507647B1 (en) 2008-12-11 2008-12-11 TRANSPARENT SAFETY ELEMENT

Publications (3)

Publication Number Publication Date
EP2196321A2 EP2196321A2 (en) 2010-06-16
EP2196321A3 EP2196321A3 (en) 2011-06-29
EP2196321B1 true EP2196321B1 (en) 2013-08-14

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ID=42062435

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09014878.4A Active EP2196321B1 (en) 2008-12-11 2009-12-01 Transparent security feature

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Country Link
EP (1) EP2196321B1 (en)
AT (1) AT507647B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011088154A1 (en) 2011-12-09 2013-06-13 CFC Europe GmbH Layered product for coating and substrate used for hologram, has optical structure comprising layer(s) with high refractive nanoparticles and/or layer(s) with low refractive nanoparticles
DE102013108666A1 (en) 2013-08-09 2015-03-05 Leonhard Kurz Stiftung & Co. Kg Method for producing a multilayer body and multilayer body
AT515670B1 (en) * 2014-06-23 2015-11-15 Hueck Folien Gmbh Security element with modified color-shift effect

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070195392A1 (en) * 1999-07-08 2007-08-23 Jds Uniphase Corporation Adhesive Chromagram And Method Of Forming Thereof
GB0015873D0 (en) * 2000-06-28 2000-08-23 Rue De Int Ltd Optically variable security device
AT413360B (en) * 2002-08-06 2006-02-15 Hueck Folien Gmbh METHOD FOR PRODUCING FAKE-SECURE IDENTIFICATION FEATURES
DE10337331A1 (en) * 2003-08-12 2005-03-17 Giesecke & Devrient Gmbh Security element with thin-film element
DE102004032565A1 (en) * 2004-07-05 2006-02-16 Giesecke & Devrient Gmbh Security element with color shift effect
DE102007061828A1 (en) * 2007-12-20 2009-06-25 Giesecke & Devrient Gmbh Security element and method for its production
DE102009008853A1 (en) * 2009-02-13 2010-08-19 Giesecke & Devrient Gmbh Through security element

Also Published As

Publication number Publication date
EP2196321A2 (en) 2010-06-16
EP2196321A3 (en) 2011-06-29
AT507647B1 (en) 2011-06-15
AT507647A1 (en) 2010-06-15

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