EP2006116A1 - Safety element with colour-switching effect and visually imperceptible safety characteristics - Google Patents

Safety element with colour-switching effect and visually imperceptible safety characteristics Download PDF

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Publication number
EP2006116A1
EP2006116A1 EP07012111A EP07012111A EP2006116A1 EP 2006116 A1 EP2006116 A1 EP 2006116A1 EP 07012111 A EP07012111 A EP 07012111A EP 07012111 A EP07012111 A EP 07012111A EP 2006116 A1 EP2006116 A1 EP 2006116A1
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EP
European Patent Office
Prior art keywords
layer
identification feature
feature according
carrier substrate
counterfeit identification
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Application number
EP07012111A
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German (de)
French (fr)
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EP2006116B1 (en
Inventor
Jürgen Dr. Keplinger
Hans Hermann Kammerer
Matthias Müller
Martin Dr. Bergsmann
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Hueck Folien GmbH
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Hueck Folien GmbH
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Application filed by Hueck Folien GmbH filed Critical Hueck Folien GmbH
Priority to EP07012111A priority Critical patent/EP2006116B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • 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
    • 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
    • B42D25/364—Liquid crystals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/369—Magnetised or magnetisable materials
    • B42D2035/24—

Definitions

  • the invention relates to a security element with color shift effect and visually unrecognizable security features.
  • WO 2004/014663 is a method for producing tamper-resistant identification features consisting of at least one electromagnetic wave reflecting layer, a spacer layer and a layer formed by metallic clusters known, wherein on a carrier substrate, a partial or full surface electromagnetic wave reflecting layer and then one or more partial and / or full-surface polymeric layers of defined thickness are applied, after which a layer of metallic clusters, which is produced by means of a vacuum-technical method or from solvent-based systems, is applied to the spacer layer.
  • the identification feature produced in this way shows a visually visible, viewing angle dependent color shift effect.
  • the object of the invention was to provide a security feature with a color shift effect, which additionally has visually unrecognizable security features.
  • the invention therefore relates to a forgery-proof identification feature consisting of a carrier substrate, a electromagnetic wave reflecting layer, a spacer layer and a layer formed by metallic clusters, characterized in that a further layer consisting of nematic or cholesteric liquid crystalline polymers is applied.
  • the carrier substrate used is, for example, flexible plastic films, for example made from P 1, PP, OPP, PE, PPS, PEEK, PEK, PEI, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC, PTFE, fluoropolymers such as Teflon, PVB, etc. in 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.
  • metal foils for example Al, Cu, Sn, Ni, Fe or stainless steel foils having a thickness of 5-200 ⁇ m, preferably 10 to 80 ⁇ m, particularly preferably 20-50 ⁇ m, may also serve as the carrier substrate.
  • the films can also be surface-treated, coated or laminated, for example with plastics, or painted.
  • carrier substrates it is also possible to use cellulose-free or cellulose-containing paper, heat-activatable paper or composites with paper, for example composites with plastics having a basis weight of 20-500 g / m 2 , preferably 40-200 g / m 2 .
  • an electromagnetic wave reflecting layer is applied on the carrier substrate.
  • This layer may preferably consist of metals such as aluminum, gold, chromium, silver, copper, tin, platinum, nickel, iron, palladium and their alloys, for example nickel / chromium, copper / aluminum, gold / palladium and the like.
  • the electromagnetic wave reflecting layer may be applied all over or partially by known methods such as spraying, vapor deposition, sputtering, printing (gravure, flexographic, screen, digital printing), painting, roller coating and the like.
  • the subsequent polymeric layer or the polymeric layers may also be applied over the entire surface or partially.
  • the polymeric layer may consist of paint or coating systems based on nitrocellulose, epoxy, polyester, rosin, acrylate, alkyd, melamine, PVA, PVC, isocyanate or urethane systems.
  • the polymeric layer is preferably applied by gravure printing and may be applied over the whole area or preferably partially.
  • this layer can be applied, for example, in the form of letters, character symbols, guilloche lines, lettering in micro or macro text.
  • the metallic clusters may consist, for example, of aluminum, gold, palladium, iron, platinum, chromium, silver, copper, nickel and the like or their alloys, such as, for example, Au / Pd or Cr / Ni.
  • This cluster layer can be deposited by sputtering (for example ion beam or magnetron) or evaporation (electron beam) from a solution or by adsorption.
  • nematic or cholesteric liquid-crystalline polymers are applied.
  • suitable nematic liquid-crystalline polymers are derivatives of cinnamic acid esters or cyanobiphenyl derivatives.
  • the layer of liquid-crystalline polymers may be applied to the polymeric spacer layer or to the cluster layer.
  • another carrier substrate which is provided with a layer of nematic liquid-crystalline polymers can be laminated onto the described cluster structure.
  • the security feature may in particular have magnetic properties.
  • a magnetic layer can be present all over or partially on both sides or on one side of the carrier substrate and can be situated above and / or below the structure or in the structure which effects the color shift effect.
  • the magnetic layers may be arranged symmetrically or asymmetrically (with the carrier substrate or other layers as the plane of symmetry).
  • a dark colored magnetic layer may, for example, be located above or below or adjacent to the spacer layer and form a background for the subsequent layer of liquid crystalline cholesteric polymers, thereby causing different color effects in the different areas.
  • paramagnetic, diamagnetic and also ferromagnetic substances such as iron, nickel and cobalt or their compounds or salts (for example oxides or sulfides) can be used.
  • the elementary magnets can be oriented or oriented (permanently aligned by an external magnetic field).
  • the carrier substrate can also already have one or more functional and / or decorative layers or can subsequently be provided therewith, wherein these layers can be integrated into the security feature by laminating a further carrier substrate which carries these layers or by direct application to the described construction.
  • color or lacquer layers a wide variety of compositions can be used in each case.
  • the composition of the individual Layers may in particular vary according to their purpose, depending on whether the individual layers serve exclusively decorative purposes or should be a functional layer or whether the layer should be both a decorative and a functional layer.
  • the layers may be pigmented or unpigmented.
  • pigments it is possible to use all known pigments, for example titanium dioxide, zinc sulfide, kaolin, ATO, FTO, ITO, aluminum, chromium oxides and silicon oxides, as well as colored pigments.
  • solvent-based coating systems and systems without solvents can be used.
  • Suitable binders are various known natural or synthetic binders.
  • the functional layers may for example have certain electrical, magnetic, special chemical, physical and also optical properties.
  • Electrode properties such as conductivity, for example, graphite, carbon black, conductive organic or inorganic polymers.
  • Metal pigments for example, copper, aluminum, silver, gold, iron, chromium lead and the like
  • metal alloys such as copper-zinc or copper-aluminum or their sulfides or oxides, or amorphous or crystalline ceramic pigments such as ITO and the like may be added.
  • doped or non-doped semiconductors such as, for example, silicon, germanium or ionic conductors, such as amorphous or crystalline metal oxides or metal sulfides, as an additive.
  • polar or partially polar compounds such as surfactants or nonpolar compounds such as silicone additives or hygroscopic or non-hygroscopic salts can be used or added to adjust the electrical properties of the layer.
  • the optical properties of the layer can be visualized by visible dyes or pigments, luminescent dyes or pigments which fluoresce or phosphoresce in the visible, in the UV range or in the IR range, effect pigments, such as liquid crystals, pearlescent, bronzes and / or heat-sensitive Influence colors or pigments. These can be used in all possible combinations.
  • phosphorescent pigments can also be used alone or in combination with other dyes and / or pigments.
  • Fig. 1 to 5 Inventive structures are shown.
  • 1 is the carrier substrate
  • 2 is the electromagnetic wave reflecting layer
  • 3 is the spacer layer
  • 4 is the cluster layer
  • 5 is a layer of cholesteric liquid-crystalline polymers
  • 5a is a layer of nematic liquid-crystalline polymers
  • 6 is a protective lacquer layer
  • 7 is a magnetic layer, a, b and c the different color effects.
  • the security features according to the invention if appropriate after appropriate assembly (for example into threads, strips, patches or other formats), therefore, can be used as security elements on data carriers, in particular value documents such as identity cards, cards, banknotes or labels, seals and the like, but also in packaging materials for sensitive goods. such as pharmaceuticals, cosmetics, data carriers, electronic components and the like.

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  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Polarising Elements (AREA)
  • Laminated Bodies (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

The mark has a reflecting layer (2) reflecting electromagnetic waves, and another layer (5a) made of nematic liquid crystalline polymers. The nematic liquid crystalline polymer layer is directly attached to a metallic cluster layer (4) and provided on a carrier substrate (1), which is laminated against the metallic cluster layer. The nematic liquid crystalline polymer layer is attached to a polymer spacer layer (3), and a set of magnetic layers are provided on both sides of the carrier substrate symmetrically or asymmetrically. An independent claim is also included for a method for visibly making color tilting effect.

Description

Die Erfindung betrifft ein Sicherheitselement mit Farbkippeffekt und visuell nicht erkennbaren Sicherheitsmerkmalen.The invention relates to a security element with color shift effect and visually unrecognizable security features.

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 gebildete dritte Schicht folgt, versehen wird.Out WO 02/18155 a method for the counterfeit-proof marking of objects is known, wherein the article with a mark consisting of an electromagnetic wave-reflecting first layer, on which an electromagnetic-wave-transmitting inert layer having a defined thickness is applied, to which this inert layer one of metallic clusters formed third layer follows, is provided.

Aus WO 2004/014663 ist ein Verfahren zur Herstellung von fälschungssicheren Identifikationsmerkmalen bestehend aus jeweils mindestens einer elektromagnetische Wellen reflektierenden Schicht, einer Abstandsschicht und einer Schicht gebildet von metallischen Clustern bekannt, wobei auf ein Trägersubstrat eine partielle oder vollflächige elektromagnetische Wellen reflektierende Schicht und anschließend eine oder mehrere partielle und/oder vollflächige polymere Schichten definierter Dicke aufgebracht werden, worauf auf die Abstandschicht eine Schicht gebildet aus metallischen Clustern, die mittels eines vakuumtechnischen Verfahrens oder aus lösungsmittelbasierten Systemen hergestellt wird, aufgebracht wird.Out WO 2004/014663 is a method for producing tamper-resistant identification features consisting of at least one electromagnetic wave reflecting layer, a spacer layer and a layer formed by metallic clusters known, wherein on a carrier substrate, a partial or full surface electromagnetic wave reflecting layer and then one or more partial and / or full-surface polymeric layers of defined thickness are applied, after which a layer of metallic clusters, which is produced by means of a vacuum-technical method or from solvent-based systems, is applied to the spacer layer.

Das so hergestellte Identifikationsmerkmal zeigt einen visuell sichtbaren vom Betrachtungswinkel abhängigen Farbkippeffekt.The identification feature produced in this way shows a visually visible, viewing angle dependent color shift effect.

Aufgabe der Erfindung war es ein Sicherheitsmerkmal mit einem Farbkippeffekt bereitzustellen, das zusätzlich visuell nicht erkennbare Sicherheitsmerkmale aufweist.The object of the invention was to provide a security feature with a color shift effect, which additionally has visually unrecognizable security features.

Gegenstand der Erfindung ist daher ein fälschungssicheres ldentifikationsmerkmal bestehend aus einem Trägersubstrat, einer elektromagnetische Wellen reflektierenden Schicht, einer Abstandsschicht und einer Schicht gebildet von metallischen Clustern, dadurch gekennzeichnet, dass eine weitere Schicht, die aus nematischen oder cholesterischen flüssigkristallinen Polymeren besteht, aufgebracht ist.The invention therefore relates to a forgery-proof identification feature consisting of a carrier substrate, a electromagnetic wave reflecting layer, a spacer layer and a layer formed by metallic clusters, characterized in that a further layer consisting of nematic or cholesteric liquid crystalline polymers is applied.

Als Trägersubstrat kommen beispielsweise flexible Kunststofffolien, beispielsweise aus Pl, PP, OPP, PE, PPS, PEEK, PEK, PEI, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC, PTFE, Fluorpolymere wie Teflon, PVB etc. in Frage.
Die Trägerfolien weisen vorzugsweise eine Dicke von 5 - 700 µm, bevorzugt 5 - 200 µm, besonders bevorzugt 5 - 50 µm auf.
Ferner können als Trägersubstrat auch Metallfolien, beispielsweise Al-, Cu-, Sn-, Ni-, Fe- oder Edelstahlfolien mit einer Dicke von 5 - 200 µm, vorzugsweise 10 bis 80 µm, besonders bevorzugt 20 - 50 µm dienen. Die Folien können auch oberflächenbehandelt, beschichtet oder kaschiert, beispielsweise mit Kunststoffen, oder lackiert sein.The carrier substrate used is, for example, flexible plastic films, for example made from P 1, PP, OPP, PE, PPS, PEEK, PEK, PEI, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC, PTFE, fluoropolymers such as Teflon, PVB, etc. in 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.
Furthermore, metal foils, for example Al, Cu, Sn, Ni, Fe or stainless steel foils having a thickness of 5-200 μm, preferably 10 to 80 μm, particularly preferably 20-50 μm, may also serve as the carrier substrate. The films can also be surface-treated, coated or laminated, for example with plastics, or painted.

Ferner können als Trägersubstrate auch zellstofffreies oder zellstoffhaltiges Papier, thermoaktivierbares Papier oder Verbunde mit Papier, beispielsweise Verbunde mit Kunststoffen mit einem Flächengewicht von 20 - 500 g/m2, vorzugsweise 40 - 200 g/m2 verwendet werden.Furthermore, as carrier substrates it is also possible to use cellulose-free or cellulose-containing paper, heat-activatable paper or composites with paper, for example composites with plastics having a basis weight of 20-500 g / m 2 , preferably 40-200 g / m 2 .

Auf das Trägersubstrat ist eine elektromagnetische Wellen reflektierende Schicht aufgebracht. Diese Schicht kann vorzugsweise aus Metallen, wie beispielsweise Aluminium, Gold, Chrom, Silber, Kupfer, Zinn, Platin, Nickel, Eisen, Paladium und deren Legierungen, beispielsweise Nickel/Chrom, Kupfer/Aluminium, Gold/Palladium und dergleichen bestehen.On the carrier substrate, an electromagnetic wave reflecting layer is applied. This layer may preferably consist of metals such as aluminum, gold, chromium, silver, copper, tin, platinum, nickel, iron, palladium and their alloys, for example nickel / chromium, copper / aluminum, gold / palladium and the like.

Die elektromagnetische Wellen reflektierende Schicht kann vollflächig oder partiell durch bekannte Verfahren, wie Sprühen, Bedampfen, Sputtern, Drucken (Tief-, Flexo-, Sieb-, Digitaldruck), Lackieren, Walzenauftragsverfahren und dergleichen aufgebracht werden.The electromagnetic wave reflecting layer may be applied all over or partially by known methods such as spraying, vapor deposition, sputtering, printing (gravure, flexographic, screen, digital printing), painting, roller coating and the like.

Die darauf folgende polymere Schicht bzw. die polymeren Schichten können ebenfalls vollflächig oder partiell aufgebracht sein.The subsequent polymeric layer or the polymeric layers may also be applied over the entire surface or partially.

Die polymere Schicht kann aus Farb- oder Lacksystemen auf Basis von Nitrocellulose, Epoxy-, Polyester-, Kolophonium-, Acrylat-, Alkyd-, Melamin-, PVA-, PVC-, Isocyanat- oder Urethansystemen bestehen.The polymeric layer may consist of paint or coating systems based on nitrocellulose, epoxy, polyester, rosin, acrylate, alkyd, melamine, PVA, PVC, isocyanate or urethane systems.

Die polymere Schicht wird vorzugsweise im Tiefdruckverfahren aufgebracht und kann vollflächig oder vorzugsweise partiell aufgebracht sein. Partiell kann diese Schicht beispielsweise in Form von Buchstaben, Zeichen Symbolen, Linien Guillochen, Schriftzügen im Mikro- oder Makrotext aufgebracht sein.The polymeric layer is preferably applied by gravure printing and may be applied over the whole area or preferably partially. Partially, this layer can be applied, for example, in the form of letters, character symbols, guilloche lines, lettering in micro or macro text.

Ferner wird eine Schicht gebildet aus metallischen Clustern aufgebracht. Die metallischen Cluster können beispielsweise aus Aluminium, Gold, Palladium, Eisen, Platin, Chrom, Silber, Kupfer, Nickel und dergleichen oder deren Legierungen, wie beispielsweise Au/Pd oder Cr/Ni bestehen.
Diese Clusterschicht kann durch Sputtern (beispielsweise lonenstrahl oder Magnetron) oder Verdampfen (Elektronenstrahl) aus einer Lösung oder durch Adsorption aufgebracht werden.Furthermore, a layer formed of metallic clusters is applied. The metallic clusters may consist, for example, of aluminum, gold, palladium, iron, platinum, chromium, silver, copper, nickel and the like or their alloys, such as, for example, Au / Pd or Cr / Ni.
This cluster layer can be deposited by sputtering (for example ion beam or magnetron) or evaporation (electron beam) from a solution or by adsorption.

Ferner ist eine Schicht aus nematischen oder cholesterischen flüssigkristallinen Polymeren aufgebracht.
Beispiele für geeignete nematische flüssigkristalline Polymere sind Derivate von Zimtsäureestern oder Cyanobiphenylderivate.Furthermore, a layer of nematic or cholesteric liquid-crystalline polymers is applied.
Examples of suitable nematic liquid-crystalline polymers are derivatives of cinnamic acid esters or cyanobiphenyl derivatives.

Die Schicht aus flüssigkristallinen Polymeren kann auf die polymere Abstandsschicht oder auf die Clusterschicht aufgebracht sein.The layer of liquid-crystalline polymers may be applied to the polymeric spacer layer or to the cluster layer.

In einer weiteren Ausführungsform kann auf den beschriebenen Clusteraufbau ein weiteres Trägersubstrat, das mit einer Schicht aus nematischen flüssigkristallinen Polymeren versehen ist, kaschiert sein.In a further embodiment, another carrier substrate which is provided with a layer of nematic liquid-crystalline polymers can be laminated onto the described cluster structure.

Durch Einsatz eines Polarisationsfilters können dann diese Merkmale, die mit freiem Auge nicht erkennbar sind, sichtbar gemacht werden.By using a polarizing filter, these features, which are not visible to the naked eye, can be visualized.

In einer besonderen Ausführungsform kann das Sicherheitsmerkmal insbesondere magnetische Eigenschaften aufweisen.
Dabei kann eine magnetische Schicht vollflächig oder partiell auf beiden Seiten oder auf einer Seite des Trägersubstrats vorhanden sein und über und/oder unter dem Aufbau oder im Aufbau, der den Farbkippeffekt bewirkt, situiert sein. Dabei können die magnetischen Schichten symmetrisch oder asymmetrisch (mit dem Trägersubstrat oder anderen Schichten als Symmetrieebene) angeordnet sein.
Ferner kann eine dunkel gefärbte magnetische Schicht beispielsweise über oder unter oder neben der Abstandsschicht situiert sein und für die darauf folgende Schicht aus flüssigkristallinen cholesterischen Polymeren einen Hintergrund bilden, wodurch es zu unterschiedlichen Farbeffekten in den unterschiedlichen Bereichen kommt.In a particular embodiment, the security feature may in particular have magnetic properties.
In this case, a magnetic layer can be present all over or partially on both sides or on one side of the carrier substrate and can be situated above and / or below the structure or in the structure which effects the color shift effect. In this case, the magnetic layers may be arranged symmetrically or asymmetrically (with the carrier substrate or other layers as the plane of symmetry).
Further, a dark colored magnetic layer may, for example, be located above or below or adjacent to the spacer layer and form a background for the subsequent layer of liquid crystalline cholesteric polymers, thereby causing different color effects in the different areas.

Zur Einstellung der magnetischen Eigenschaften können paramagnetische, diamagnetische und auch ferromagnetische Stoffe, wie Eisen, Nickel und Cobalt oder deren Verbindungen oder Salze (beispielsweise Oxide oder Sulfide) verwendet werden.To adjust the magnetic properties, paramagnetic, diamagnetic and also ferromagnetic substances, such as iron, nickel and cobalt or their compounds or salts (for example oxides or sulfides) can be used.

Die Elementarmagnete können dabei ausgerichtet bzw. orientiert ausgerichtet sein (durch ein externes Magnetfeld permanent ausgerichtet).The elementary magnets can be oriented or oriented (permanently aligned by an external magnetic field).

Das Trägersubstrat kann auch bereits eine oder mehrere funktionelle und/oder dekorative Schichten aufweisen oder anschließend damit versehen werden, wobei diese Schichten durch Kaschieren eines weiteren Trägersubstrats, das diese Schichten trägt, oder durch direktes Aufbringen auf den beschriebenen Aufbau in das Sicherheitsmerkmal integriert werden können.
Als solche Farb- bzw. Lackschichten können jeweils verschiedenste Zusammensetzungen verwendet werden. Die Zusammensetzung der einzelnen Schichten kann insbesondere nach deren Aufgabe variieren, je nach dem ob die einzelnen Schichten ausschließlich Dekorationszwecken dienen oder eine funktionelle Schicht sein sollen oder ob die Schicht sowohl eine Dekorationsals auch eine funktionelle Schicht sein soll.The carrier substrate can also already have one or more functional and / or decorative layers or can subsequently be provided therewith, wherein these layers can be integrated into the security feature by laminating a further carrier substrate which carries these layers or by direct application to the described construction.
As such color or lacquer layers, a wide variety of compositions can be used in each case. The composition of the individual Layers may in particular vary according to their purpose, depending on whether the individual layers serve exclusively decorative purposes or should be a functional layer or whether the layer should be both a decorative and a functional layer.

Die Schichten können pigmentiert oder nicht pigmentiert sein. Als Pigmente können alle bekannten Pigmente, wie beispielsweise Titandioxid, Zinksulfid, Kaolin, ATO, FTO, ITO, Aluminium, Chrom- und Siliciumoxide als auch farbige Pigmente verwendet werden. Dabei sind lösungsmittelhaltige Lacksysteme als auch Systeme ohne Lösungsmittel verwendbar.
Als Bindemittel kommen verschiedene bekannte natürliche oder synthetische Bindemittel in Frage.The layers may be pigmented or unpigmented. As pigments, it is possible to use all known pigments, for example titanium dioxide, zinc sulfide, kaolin, ATO, FTO, ITO, aluminum, chromium oxides and silicon oxides, as well as colored pigments. In this case, solvent-based coating systems and systems without solvents can be used.
Suitable binders are various known natural or synthetic binders.

Die funktionellen Schichten können beispielsweise bestimmte elektrische, magnetische, spezielle chemische, physikalische und auch optische Eigenschaften aufweisen.The functional layers may for example have certain electrical, magnetic, special chemical, physical and also optical properties.

Zur Einstellung elektrischer Eigenschaften, beispielsweise Leitfähigkeit können beispielsweise Graphit, Ruß, leitfähige organische oder anorganische Polymere. Metallpigmente (beispielsweise Kupfer, Aluminium, Silber, Gold, Eisen, Chrom Blei und dergleichen), Metalllegierungen wie Kupfer-Zink oder Kupfer- Aluminium oder deren Sulfide oder Oxide, oder auch amorphe oder kristalline keramische Pigmente wie ITO und dergleichen zugegeben werden. Weiters können auch dotierte oder nicht dotierte Halbleiter wie beispielsweise Silicium, Germanium oder lonenleiter wie amorphe oder kristalline Metalloxide oder Metallsulfide als Zusatz verwendet werden. Ferner können zur Einstellung der elektrischen Eigenschaften der Schicht polare oder teilweise polare Verbindungen, wie Tenside oder unpolare Verbindungen wie Silikonadditive oder hygroskopische oder nicht hygroskopische Salze verwendet oder zugesetzt werden.To adjust electrical properties, such as conductivity, for example, graphite, carbon black, conductive organic or inorganic polymers. Metal pigments (for example, copper, aluminum, silver, gold, iron, chromium lead and the like), metal alloys such as copper-zinc or copper-aluminum or their sulfides or oxides, or amorphous or crystalline ceramic pigments such as ITO and the like may be added. Furthermore, it is also possible to use doped or non-doped semiconductors, such as, for example, silicon, germanium or ionic conductors, such as amorphous or crystalline metal oxides or metal sulfides, as an additive. Furthermore, polar or partially polar compounds such as surfactants or nonpolar compounds such as silicone additives or hygroscopic or non-hygroscopic salts can be used or added to adjust the electrical properties of the layer.

Die optischen Eigenschaften der Schicht lassen sich durch sichtbare Farbstoffe bzw. Pigmente, lumineszierende Farbstoffe bzw. Pigmente, die im sichtbaren, im UV-Bereich oder im IR-Bereich fluoreszieren bzw. phosphoreszieren, Effektpigmente, wie Flüssigkristalle, Perlglanz, Bronzen und/oder wärmeempfindliche Farben bzw. Pigmente beeinflussen. Diese sind in allen möglichen Kombinationen einsetzbar. Zusätzlich können auch phosphoreszierende Pigmente allein oder in Kombination mit anderen Farbstoffen und/oder Pigmenten eingesetzt werden.The optical properties of the layer can be visualized by visible dyes or pigments, luminescent dyes or pigments which fluoresce or phosphoresce in the visible, in the UV range or in the IR range, effect pigments, such as liquid crystals, pearlescent, bronzes and / or heat-sensitive Influence colors or pigments. These can be used in all possible combinations. In addition, phosphorescent pigments can also be used alone or in combination with other dyes and / or pigments.

In den Fig. 1 bis 5 sind erfindungsgemäße Aufbauten dargestellt.
Dabei bedeuten 1 das Trägersubstrat, 2 die elektromagnetische Wellen reflektierende Schicht, 3 die Abstandsschicht, 4 die Clusterschicht, 5 eine Schicht aus cholesterischen flüssigkristallinen Polymeren, 5a eine Schicht aus nematischen flüssigkristallinen Polymeren, 6 eine Schutzlackschicht und 7 eine Magnetschicht, a, b und c die unterschiedlichen Farbeffekte.In the Fig. 1 to 5 Inventive structures are shown.
1 is the carrier substrate, 2 is the electromagnetic wave reflecting layer, 3 is the spacer layer, 4 is the cluster layer, 5 is a layer of cholesteric liquid-crystalline polymers, 5a is a layer of nematic liquid-crystalline polymers, 6 is a protective lacquer layer and 7 is a magnetic layer, a, b and c the different color effects.

Die erfindungsgemäßen Sicherheitsmerkmale werden gegebenenfalls nach entsprechender Konfektionierung (beispielsweise zu Fäden, Bändern Streifen, Patches oder anderen Formaten) daher als Sicherheitselemente auf Datenträgern, insbesondere Wertdokumenten wie Ausweisen, Karten, Banknoten oder Etiketten, Siegeln und dergleichen, aber auch in Verpackungsmaterialien für sensible Güter, wie Pharmazeutika, Kosmetika, Datenträger, elektronische Bauteile und dergleichen verwendet.The security features according to the invention, if appropriate after appropriate assembly (for example into threads, strips, patches or other formats), therefore, can be used as security elements on data carriers, in particular value documents such as identity cards, cards, banknotes or labels, seals and the like, but also in packaging materials for sensitive goods. such as pharmaceuticals, cosmetics, data carriers, electronic components and the like.

Claims (12)

Fälschungssicheres Identifikationsmerkmal bestehend aus einem Trägersubstrat, einer vollflächigen oder partiellen elektromagnetische Wellen reflektierenden Schicht, einer Abstandsschicht und einer Schicht gebildet von metallischen Clustern, dadurch gekennzeichnet, dass das Identifikationsmerkmal eine weitere Schicht, die aus flüssigkristallinen Polymeren besteht, aufweist.Counterfeit-proof identification feature consisting of a carrier substrate, a full-surface or partial electromagnetic wave reflecting layer, a spacer layer and a layer formed by metallic clusters, characterized in that the identification feature comprises a further layer consisting of liquid-crystalline polymers. Fälschungssicheres Identifikationsmerkmal nach Anspruch 1, dadurch gekennzeichnet, das eine Schicht aus nematischen flüssigkristallinen Polymeren direkt auf die Schicht aus metallischen Clustern aufgebracht ist.Anti-counterfeit identification feature according to claim 1, characterized in that a layer of nematic liquid-crystalline polymers is applied directly to the layer of metallic clusters. Fälschungssicheres ldentifikationsmerkmal nach Anspruch 1, dadurch gekennzeichnet, dass eine Schicht aus nematischen flüssigkristallinen Polymeren auf einem weiteren Trägersubstrat vorhanden ist, das gegen die Clusterschicht kaschiert ist.Anti-counterfeit identification feature according to claim 1, characterized in that a layer of nematic liquid-crystalline polymers is present on a further carrier substrate, which is laminated against the cluster layer. Fälschungssicheres Identifikationsmerkmal nach Anspruch 1, dadurch gekennzeichnet, dass die Schicht aus nematischen flüssigkristallinen Polymeren auf die polymere Abstandsschicht aufgebracht ist.Anti-counterfeit identification feature according to claim 1, characterized in that the layer of nematic liquid-crystalline polymers is applied to the polymeric spacer layer. Fälschungssicheres Identifikationsmerkmal nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass zusätzlich eine oder mehrere magnetische Schichten vollflächig oder partiell auf beiden Seiten oder auf einer Seite des Trägersubstrats vorhanden sind.Anti-counterfeit identification feature according to one of claims 1 to 4, characterized in that in addition one or more magnetic layers are present over the entire surface or partially on both sides or on one side of the carrier substrate. Fälschungssicheres Identifikationsmerkmal nach Anspruch 5, dadurch gekennzeichnet, dass die magnetischen Schichten asymmetrisch oder symmetrisch mit dem Trägersubstrat oder anderen Schichten als Symmetrieebene vorhanden sind.Anti-counterfeit identification feature according to claim 5, characterized in that the magnetic layers asymmetric or are present symmetrically with the carrier substrate or other layers as the plane of symmetry. Fälschungssicheres Identifikationsmerkmal nach einem der Ansprüche 5 oder 6, dadurch gekennzeichnet, dass zumindest eine magnetische Schicht auf der Abstandsschicht aufgebracht ist.Anti-counterfeit identification feature according to one of claims 5 or 6, characterized in that at least one magnetic layer is applied to the spacer layer. Fälschungssicheres Identifikationsmerkmal nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass die magnetische Schicht unter einer Schicht aus cholesterischen flüssigkristallinen Polymeren aufgebracht ist.Anti-counterfeit identification feature according to one of claims 5 to 7, characterized in that the magnetic layer is applied under a layer of cholesteric liquid-crystalline polymers. Fälschungssicheres Identifikationsmerkmal nach Anspruch 8, dadurch gekennzeichnet, dass die Elementarmagnete ausgerichtet sindAnti-counterfeit identification feature according to claim 8, characterized in that the elementary magnets are aligned Fälschungssicheres Identifikationsmerkmal nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass auf dem Trägersubstrat weitere funktionelle Schichten vorhanden sind.Anti-counterfeit identification feature according to one of Claims 1 to 9, characterized in that further functional layers are present on the carrier substrate. Verfahren zum Sichtbarmachen des Farbkippeffekts, dadurch gekennzeichnet, dass der Farbkippeffekt durch einen Polarisationsfilter sichtbar gemacht wird.A method for visualizing the color shift effect, characterized in that the color shift effect is made visible by a polarizing filter. Verwendung des Identifikationsmerkmals nach einem der Ansprüche 1 bis 9 als Sicherheitselemente auf Datenträgern, insbesondere Wertdokumenten wie Ausweisen, Karten, Banknoten oder Etiketten, Siegeln und dergleichen, aber auch in Verpackungsmaterialien für sensible Güter, wie Pharmazeutika, Kosmetika, Datenträger, elektronische Bauteile.Use of the identification feature according to one of claims 1 to 9 as security elements on data carriers, in particular value documents such as identity cards, cards, banknotes or labels, seals and the like, but also in packaging materials for sensitive goods, such as pharmaceuticals, cosmetics, data carriers, electronic components.
EP07012111A 2007-06-21 2007-06-21 Safety element with colour-switching effect and visually imperceptible safety characteristics Revoked EP2006116B1 (en)

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Cited By (2)

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DE102008061608A1 (en) * 2008-12-11 2010-06-17 Giesecke & Devrient Gmbh security element
WO2016096086A1 (en) * 2014-12-15 2016-06-23 Hueck Folien Ges.M.B.H. Security element with colour shift effect and fluorescent features and method for production and use of same

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EP0752323A1 (en) * 1994-12-28 1997-01-08 Dai Nippon Printing Co., Ltd. Ticket and its rewrite processor
WO2002018155A2 (en) * 2000-08-29 2002-03-07 november Aktiengesellschaft Gesellschaft für Molekulare Medizin Method for forgery-proof labeling of items, and forgery-proof label
WO2004028824A2 (en) * 2002-09-19 2004-04-08 Giesecke & Devrient Gmbh Security element
WO2005108108A2 (en) * 2004-04-30 2005-11-17 Giesecke & Devrient Gmbh Security element and methods for the production thereof
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EP0752323A1 (en) * 1994-12-28 1997-01-08 Dai Nippon Printing Co., Ltd. Ticket and its rewrite processor
WO2002018155A2 (en) * 2000-08-29 2002-03-07 november Aktiengesellschaft Gesellschaft für Molekulare Medizin Method for forgery-proof labeling of items, and forgery-proof label
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DE102008061608A1 (en) * 2008-12-11 2010-06-17 Giesecke & Devrient Gmbh security element
EP2196322B1 (en) 2008-12-11 2017-10-25 Giesecke+Devrient Currency Technology GmbH Security element
WO2016096086A1 (en) * 2014-12-15 2016-06-23 Hueck Folien Ges.M.B.H. Security element with colour shift effect and fluorescent features and method for production and use of same
US10214045B2 (en) 2014-12-15 2019-02-26 Hueck Folien Ges.M.B.H. Security element with colour shift effect and fluorescent features and method for production and use of same
EP3233516B1 (en) 2014-12-15 2020-06-03 Hueck Folien Gesellschaft m.b.H. Security element with colour shift effect and fluorescent features

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