EP3233516A1 - Security element with colour shift effect and fluorescent features and method for production and use of same - Google Patents

Security element with colour shift effect and fluorescent features and method for production and use of same

Info

Publication number
EP3233516A1
EP3233516A1 EP15812951.0A EP15812951A EP3233516A1 EP 3233516 A1 EP3233516 A1 EP 3233516A1 EP 15812951 A EP15812951 A EP 15812951A EP 3233516 A1 EP3233516 A1 EP 3233516A1
Authority
EP
European Patent Office
Prior art keywords
security element
layer
element according
optically variable
variable effect
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15812951.0A
Other languages
German (de)
French (fr)
Other versions
EP3233516B1 (en
Inventor
Marco Mayrhofer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hueck Folien GmbH
Original Assignee
Hueck Folien GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Hueck Folien GmbH filed Critical Hueck Folien GmbH
Publication of EP3233516A1 publication Critical patent/EP3233516A1/en
Application granted granted Critical
Publication of EP3233516B1 publication Critical patent/EP3233516B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B42D25/378—Special inks
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—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
    • 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
    • B42D25/328—Diffraction gratings; Holograms
    • 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
    • B42D25/346—Perforations
    • 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
    • B42D25/364—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
    • 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

Definitions

  • the invention relates to a, a color shift effect exhibiting security element, which additionally recognizable in transmitted light recesses and fluorescent features, a method for its preparation, and its use.
  • Color-shift effects can be achieved by various means, such as thin-film interference, such as structures having an electromagnetic wave reflecting layer, a spacer layer, and a metallic cluster layer.
  • Such security elements are described, for example, in US 2005/042449 A or in EP 1 558 449 A.
  • Another way to provide a security element that has a color shift effect is to use a coating of liquid crystals, either in the form of a pigmented layer or a polymerized film.
  • EP 0 435 129 A discloses a data carrier with a liquid-crystalline security element, wherein the material is a liquid-crystal polymer which is present in an oriented form and at room temperature as a solid.
  • WO 00/50249 A discloses a security element comprising an optically variable material, which may be, for example, a liquid-crystalline material, and at least one additional machine-readable feature substance in the same layer.
  • an optically variable material which may be, for example, a liquid-crystalline material
  • additional machine-readable feature substance in the same layer.
  • the light-absorbing, preferably black, background is clearly visible as a dark area on the back of a security element, such as a thread or strip at least partially embedded in a value document, such as a banknote or the like.
  • This light-absorbing background must therefore be covered so as not to discern the security element from the outset. This cover can be done for example by a metallic layer.
  • a method for producing a substrate comprising the steps of applying a resist to at least a portion of a metal layer on a first side of a transparent polymer film, removing metal from the areas not covered by the cap layer for formation metal-free portions and applying a further layer to cover the resist and the metal-free portions, wherein the further layer is a layer of liquid crystal polymer material, and the resist is dark colored and the underlying metal areas masked and in the areas covered by the liquid crystal polymer material when viewed under reflection leading to a color change effect from the first side, and wherein the contrast between the metallized and metal-free regions can be clearly distinguished.
  • security elements that have a color shift effect can be produced by layers with optically variable pigments.
  • Such pigments are known, for example, in US 2003/0207113 or US Pat. No. 5,171,363.
  • These security elements can also have further security features, in particular also fluorescent features which, however, are present on the side facing away from the side with the optically variable effect. On the side on which the optically variable effect is visible, fluorescent colors are not used, because they affect the visibility of the optical variable effect significantly by their opacity.
  • the object of the invention was to provide a security element comprising a material having an optically variable effect, preferably a color shift effect, and recesses recognizable in transmitted light, wherein the security element is designed such that it provides both optimum recognition of the optically variable effect allows, and additionally as a further security feature one or more coatings with fluorescent colors on the side on which the optically variable effect can be seen, which correspond to the optical security element, which has an optically variable effect.
  • the invention therefore relates to a security element which has a coating of a material which has an optically variable effect, in particular a color shift effect and recognizable recesses in the transmitted light, wherein the security element comprises a carrier substrate and a partial layer with recesses and a color shift effect causing layer structure , characterized in that the security element on the side on which the coating of the material having an optically variable effect comprises one or more partial coatings of a layer of transparent in visible light and fluorescent in UV light colors (pigments ??) having.
  • the layer structure comprising an optically variable effect may comprise a carrier substrate and a partial layer with recesses, wherein the partial layer T EP2015 / 002377
  • the partial opaque coating consists of a light-absorbing metallic layer and a reflective metallic layer.
  • the material having an optically variable effect may be an ink containing pigments of liquid crystal material.
  • the pigments consist of cholesteric or a mixture of nematic and cholesteric liquid crystals.
  • OMI pigments optically variable interference pigments
  • Such pigments are described, for example, in US 2003/0207113.
  • iridescent pigments for example, Iriodine ® pigments can be used.
  • Iriodine ® is based on naturally occurring mineral mica flakes encased in semi-transparent metal oxides.
  • the material having an optically variable effect may consist of a liquid crystal polymer which is applied as a solution of the cholesteric monomers or the mixture of cholesteric and nematic monomers and then crosslinked.
  • the crosslinking can be effected thermally or by treatment with UV radiation or electron radiation.
  • the recesses when viewed in transmitted light, the recesses can be seen as a clear contrast to the areas which have a light-absorbing and a reflective metallic layer. Due to the reflective metallic layer, the security element, if it is embedded in a value document, is also in the document Incident light from the back through the paper surface not or hardly recognizable. From the back, however, the recesses are clearly visible in transmitted light. From the front of the optically variable effect and the recesses in Auf Licht are clearly visible.
  • a light-absorbing metallic layer are preferably non-stoichiometric alumina and stoichiometric or unstoichiometric copper oxide in question.
  • the light-absorbing metallic layer has a preferably dark to black coloration. The stronger the absorption of the background in the visible spectral range (350 - 800 nm), the stronger the visible optically variable effect.
  • metals such as Al, Sn, Cu, Zn, Pt, Au, Ag, Cr, Ti, Mo, Fe, Pd, Ni, Co or their alloys, for example Cu / Al in question.
  • the light-absorbing metallic layer may consist of unstoichiometric alumina, preferably having an oxygen content of about 19-58 at%, and the reflective metallic layer of aluminum.
  • the recesses in the light absorbing metallic layer and the reflective metallic layer are perfectly congruent and may be in the form of characters, letters, numbers, images, symbols, lines, guilloches, and the like. Also combinations of these forms are possible.
  • the recesses may also be in negative form, that is, for example, the area around a character, a letter and the like forms the recess.
  • the layer structure having an optically variable effect can consist of at least one electromagnetic wave reflecting layer, one polymeric spacing layer and one layer of metallic clusters.
  • an electromagnetic wave-reflecting layer is applied to a carrier substrate.
  • This layer may preferably be made of metals such as aluminum, gold, chromium, silver, copper, tin, platinum, nickel or tantalum, of semiconductors such as silicon, and their alloys, for example nickel / chromium, copper / aluminum and the like or a Printing ink with metal pigments exist.
  • the electromagnetic wave reflecting layer is wholly or partially by known methods, such as spraying, vapor deposition, sputtering, or for example as a printing ink by known printing (gravure, flexo, screen, digital printing), by painting, roller application method, slot nozzle (slot). Eye), roll dip coating or curtain coating method and the like.
  • the following polymeric spacer layer or the polymeric spacer layers can also be applied over the whole area or preferably partially.
  • the polymeric layers consist for example of conventional or radiation-curing, in particular UV-curing, dye or paint systems based on nitrocellulose, epoxy polyester rosin, acrylate, alkyd, melamine, PVA, PVC, isocyanate, urethane or PS copolymer systems.
  • On the polymeric layer is then applied a full-area or partial layer formed of metallic clusters.
  • 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.
  • the fluorescent colors according to the invention have a high transparency in visible light and thus do not affect the appearance of the optically variable element.
  • the fluorescent colors are tuned to the optically active effect.
  • fluorescent colors in yellow and green can be present on the security element, analogous to a farking effect from red to blue, fluorescent colors in red and blue.
  • the color-shift effect can select contrasting or more than two different fluorescence colors.
  • the fluorescent colors can also be arranged in the form of a so-called rainbow layout.
  • the fluorescent colors can be present in the form of bars in an alternating sequence on the security element, wherein the extent of the individual different fluorescent colors can correspond to the recesses recognizable in the transmitted light.
  • the fluorescent coating according to the invention is such that it appears completely transparent in visible light.
  • transparent fluorescent dyes are dissolved in a suitable solvent, for example dlacetone alcohol, i-propyl alcohol, ethanol, ethoxypropanol, ethylene glycol, methoxypropanol, methoxydipropanol, n-propanol, ethoxybutanol, n-butanol, ethoxypropanol, butylglycol, hexane, cyclopentanone, acetone, Ethyl acetate, butyl acetate, cyclohexanone, I-propyl acetate, Metyhlethylketon, methoxypropyl acetate, n-propyl acetate, special gasoline, toluene, water, xylene, methyl isobutyl ketone at elevated temperature, preferably up to the boiling temperature of Solvent solved.
  • a suitable solvent for example dlacetone alcohol, i-propyl alcohol, ethanol, eth
  • Suitable transparent standard coating compositions are, for example, nitrocellulose-based paints, PE acrylate, PET acrylate, urethane acrylate, PVC, PMMA ethylene acrylate copolymers, styrene acrylates or epoxy acrylate, PET, PC.
  • organic fluorescent dyes Particularly suitable as transparent fluorescent dyes are organic fluorescent dyes. Particularly suitable are organic fluorescent dyes, for example based on chelates, oxinates, derivatives of thermophthalic acid, anthranilic acid, whether benzimidazole,
  • Salicylic acid organic complexes of rare earth metals, in particular pigments from the Lumilux ® - series (Honeywell), such as Lumilux ® CD 335, Lumilux ® CD 740, Lumilux ® CD 340, Lumilux ® Red CD 335, Lumilux ® Red CD 332 (red fluorescence) , optical brighteners, as Tinopal® OB, Lumilux CD ® Blue 302 Blue ® Lumilux CD 311, Lumilux ® Blue 710 Blue ® Lumilux CD 310 (blue fluorescence), Lumilux CD 702 ®, Lumilux Green CD 302 ®, Lumilux Green ® CD 708, lumilux ® green CD 308 lumilux ® green CD 396 (green
  • Lumilux CD 792 or ® Lumilux CD 792, CD 797 Lumilux ®, ® Lumilux CD 782, CD 382 ® Lumilux (yellow-green fluorescence).
  • the intensity of fluorescence depends on the concentration of dissolved dye in the paint. The greatest intensity is therefore achieved when the solubility limit at the boiling point of the solvent used is reached. Depending on the concentration of the dye, any desired levels of intensity can be achieved.
  • carrier films are preferably transparent flexible plastic films, for example, from PI, PP, MOPP, PE, PS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC, PTFE, ETFE (ethylene tetrafluoroethylene), PFA (tetrafluoroethylene-perfluoropropyl vinyl ether fluorocopolymer), MFA (tetrafluoromethylene-perfluoropropyl vinyl ether fluorocopolymer), PTFE (polytetrafluoroethylene), PVF (polyvinyl fluoride), PVDF (polyvinylidene fluoride), and EFEP (ethylene-tetrafluoroethylene-hexafluoropropylene fluoropolymer).
  • the carrier films preferably have a thickness of 5 to 700 ⁇ m, preferably 5 to 200 ⁇ m, particularly preferably 5 to 50 ⁇ m.
  • the security element according to the invention can also have further security features which can be present in further layers.
  • These security features for example, can have certain chemical, physical and also optical or optical active 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.
  • magnétique pigment paints with pigments based on Fe oxides, iron, nickel cobalt and their alloys, barium or cobalt ferrites, hard and soft magnetic iron and steel grades in aqueous or solvent-containing dispersions.
  • suitable solvents are i-propanol, ethyl acetate, methyl ethyl ketone, methoxypropanol and mixtures thereof.
  • the pigments are preferably incorporated in acrylate polymer dispersions having a molecular weight of from 150,000 to 300,000, in nitrocellulose, acrylate-urethane dispersions, acrylate-styrene or PVC-containing dispersions or in solvent-containing dispersions of this type.
  • the magnetic layer may also have a coding. Both magnetic materials of the same coercivity and / or remanence, as also different coercivity and / or remanence can be used to form the coding.
  • the reflective metallic layer may itself have magnetic properties. This is achieved, for example, by the use of a magnetic material such as Fe, Ni, Co.
  • the optical properties of the layer can be influenced by visible dyes or pigments, heat-sensitive inks or pigments. These can be used individually or in all possible combinations.
  • optically active characteristics are here diffraction structures, diffraction gratings, kinegrams, holograms, DID understood ® (0th order in conjunction with thin films microstructures).
  • optically active features can be produced, for example, by known UV embossing processes, as described, for example, in EP 1 310 381 A or by hot embossing processes
  • this adhesive coating can be carried out either in the form of a heat-seal, cold-seal or self-adhesive coating.
  • the adhesive may also be pigmented, it being possible to use as pigments all known pigments or dyes, for example ⁇ 2, ZnS, kaolin, ATO, FTO, aluminum, chromium and silicon oxides or, for example, organic pigments such as pthalocyanine blue, i-indolold yellow, dioxazine violet and the like , Furthermore, it is possible to add heat-sensitive dyes or pigments to luminescent dyes or pigments which fluoresce or phosphoresce in the visible, in the UV region or in the IR region.
  • luminescent pigments can also be used alone or in combination with other dyes and / or pigments.
  • the security element can also be protected by one or more protective lacquer layer (s), which may be pigmented or unpigmented, or further refined, for example, by laminating or the like.
  • a metallic layer for example an aluminum layer
  • the security element according to the invention is suitable for at least partially embedding in or application on identity cards, cards, banknotes or labels, seals and the like, but also as packaging material, for example in the pharmaceutical, electronics and / or food industry, for example in the form of blister foils, cartons , Covers, foil packaging and the like.
  • the substrates or film materials are preferably cut into strips, threads or patches, wherein the width of the strips or threads may preferably be 0.5-20 mm and the patches preferably have average widths or lengths of 0.3. 20 mm.
  • the film material is preferably cut into strips, tapes, threads or patches, the width of which of the threads, strips or tapes being preferably 0.5-50 mm and the patches preferably being average widths and lengths of 2 - 30 mm.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Credit Cards Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention relates to a security element having a coating consisting of a material which has an optically variable effect, in particular a colour shift effect, and has recesses that can be recognised in transmitted light, wherein the security element comprises a support substrate, a partial layer with recesses, and a layer structure that generates a colour shift effect, characterised in that the security element, on the face which has the coating consisting of the material that has an optically variable effect, comprises one or more partial coatings consisting of a layer which has colours that are transparent in visible light and fluorescent in UV light.

Description

Sicherheitselement mit Farbkippeffekt und fluoreszierenden Merkmalen, Verfahren zu dessen Herstellung und dessen Verwendung  Security element with color shift effect and fluorescent features, process for its preparation and its use
Die Erfindung betrifft ein, einen Farbkippeffekt aufweisendes Sicherheitselement, das zusätzlich im Durchlicht erkennbare Aussparungen und fluoreszierende Merkmale aufweist, ein Verfahren zu dessen Herstellung, sowie dessen Verwendung. The invention relates to a, a color shift effect exhibiting security element, which additionally recognizable in transmitted light recesses and fluorescent features, a method for its preparation, and its use.
Sicherheitselemente, die einen Farbkippeffekt aufweisen sind bekannt. Farbkippeffekte können durch unterschiedliche Maßnahmen erzielt werden, beispielsweise durch Dünnschichtinterferenz, wie durch Aufbauten, die eine elektromagnetische Wellen reflektierende Schicht, eine Abstandsschicht und eine Schicht gebildet aus metallischen Cluster aufweisen. Derartige Sicherheitselemente sind beispielsweise in US 2005/042449 A oder in EP 1 558 449 A beschrieben. Security elements that have a color shift effect are known. Color-shift effects can be achieved by various means, such as thin-film interference, such as structures having an electromagnetic wave reflecting layer, a spacer layer, and a metallic cluster layer. Such security elements are described, for example, in US 2005/042449 A or in EP 1 558 449 A.
Eine weitere Möglichkeit ein Sicherheitselement bereitzustellen, das einen Farbkippeffekt aufweist, ist die Verwendung einer Beschichtung aus Flüssigkristallen, entweder in Form einer pigmentierten Schicht oder eines polymerisierten Films. Another way to provide a security element that has a color shift effect is to use a coating of liquid crystals, either in the form of a pigmented layer or a polymerized film.
Aus EP 0 435 129 A ist ein Datenträger mit einem flüssigkristallinem Sicherheitselement bekannt, wobei das Material ein Flüssigkristallpolymer ist, das in orientierter Form und bei Raumtemperatur als Festkörper vorliegt. EP 0 435 129 A discloses a data carrier with a liquid-crystalline security element, wherein the material is a liquid-crystal polymer which is present in an oriented form and at room temperature as a solid.
In WO 00/50249 A ist ein Sicherheitselement geoffenbart, das ein optisch variables Material, das beispielweise ein flüssigkristallines Material sein kann, und zumindest einen zusätzlichen maschinenlesbaren Merkmalstoff in derselben Schicht aufweist. Um den Farbkippeffekt optimal zu erkennen, ist es erforderlich einen lichtabsorbierenden, vorzugsweise schwarzen, Hintergrund bereitzustellen. Der lichtabsorbierende, vorzugsweise schwarze Hintergrund ist jedoch auf der Rückseite eines Sicherheitselements, wie beispielsweise eines Fadens oder Streifens, das zumindest teilweise in ein Wertdokument, wie eine Banknote oder dergleichen eingebettet ist, deutlich als dunkler Bereich sichtbar. Dieser lichtabsorbierende Hintergrund muss also, um das Sicherheitselement nicht von vornherein erkennbar zu machen, abgedeckt werden. Diese Abdeckung kann beispielsweise durch eine metallische Schicht erfolgen. WO 00/50249 A discloses a security element comprising an optically variable material, which may be, for example, a liquid-crystalline material, and at least one additional machine-readable feature substance in the same layer. In order to optimally recognize the color shift effect, it is necessary to provide a light-absorbing, preferably black, background. However, the light-absorbing, preferably black, background is clearly visible as a dark area on the back of a security element, such as a thread or strip at least partially embedded in a value document, such as a banknote or the like. This light-absorbing background must therefore be covered so as not to discern the security element from the outset. This cover can be done for example by a metallic layer.
Aus EP 1 467 873 A ist ein Verfahren zur Herstellung eines Substrats bekannt, das folgende Schritte umfasst: Auftragen eines Abdecklacks auf wenigstens einem Teil einer Metallschicht auf einer ersten Seite eines transparenten Polymerfilms, Entfernen von Metall von den nicht durch die Abdeckschicht bedeckten Bereichen zur Bildung metallfreier Abschnitte und Auftragen einer weiteren Schicht zur Abdeckung des Abdecklacks und der metallfreien Abschnitte, wobei die weitere Schicht eine Schicht aus Flüssigkristallpolymermaterial ist, und der Abdecklack dunkel gefärbt ist und die darunter liegenden Metallbereiche maskiert und in den durch das Flüssigkristallpolymermaterial bedeckten Bereichen bei Betrachtung unter Reflexion von der ersten Seite zu einem Farbveränderungseffekt führt und wobei der Kontrast zwischen den metallisierten und den metallfreien Bereichen deutlich unterschieden werden kann. From EP 1 467 873 A, a method for producing a substrate is known comprising the steps of applying a resist to at least a portion of a metal layer on a first side of a transparent polymer film, removing metal from the areas not covered by the cap layer for formation metal-free portions and applying a further layer to cover the resist and the metal-free portions, wherein the further layer is a layer of liquid crystal polymer material, and the resist is dark colored and the underlying metal areas masked and in the areas covered by the liquid crystal polymer material when viewed under reflection leading to a color change effect from the first side, and wherein the contrast between the metallized and metal-free regions can be clearly distinguished.
Ferner können Sicherheitselemente, die einen Farbkippeffekt aufweisen durch Schichten mit optisch variablen Pigmenten hergestellt werden. Furthermore, security elements that have a color shift effect can be produced by layers with optically variable pigments.
Derartige Pigmente sind beispielsweise in US 2003/0207113 oder US 5,171 ,363 bekannt. Diese Sicherheitselemente können auch weitere Sicherheitsmerkmale aufweisen, insbesondere auch fluoreszierende Merkmale, die allerdings auf der der Seite mit dem optisch variablen Effekt abgewandten Seite vorhanden sind. Auf der Seite, auf der der optisch variable Effekt sichtbar ist, werden fluoreszierende Farben nicht eingesetzt, da diese durch ihre Opazität die Erkennbarkeit des optische variablen Effekts erheblich beeinträchtigen. Such pigments are known, for example, in US 2003/0207113 or US Pat. No. 5,171,363. These security elements can also have further security features, in particular also fluorescent features which, however, are present on the side facing away from the side with the optically variable effect. On the side on which the optically variable effect is visible, fluorescent colors are not used, because they affect the visibility of the optical variable effect significantly by their opacity.
Aufgabe der Erfindung war es, ein Sicherheitselement, das ein Material aufweist, das einen optisch variablen Effekt, vorzugsweise einen Farbkippeffekt, und im Durchlicht erkennbare Aussparungen aufweist, bereitzustellen, wobei das Sicherheitselement derart ausgeführt ist, dass es sowohl eine optimale Erkennung des optisch variablen Effekts erlaubt, und zusätzlich als weiteres Sicherheitsmerkmal eine oder mehrere Beschichtungen mit fluoreszierenden Farben auf der Seite, auf der der optisch variable Effekt erkennbar ist, aufweist, die mit dem optisch Sicherheitselement, das einen optisch variablen Effekt aufweist, korrespondieren. The object of the invention was to provide a security element comprising a material having an optically variable effect, preferably a color shift effect, and recesses recognizable in transmitted light, wherein the security element is designed such that it provides both optimum recognition of the optically variable effect allows, and additionally as a further security feature one or more coatings with fluorescent colors on the side on which the optically variable effect can be seen, which correspond to the optical security element, which has an optically variable effect.
Gegenstand der Erfindung ist daher ein Sicherheitselement, das eine Beschichtung aus einem Material aufweist, das einen optisch variablen Effekt, insbesondere einen Farbkippeffekt und im Durchlicht erkennbare Aussparungen aufweist, wobei das Sicherheitselement ein Trägersubstrat und eine partielle Schicht mit Aussparungen sowie einen einen Farbkippeffekt hervorrufenden Schichtaufbau umfasst , dadurch gekennzeichnet, dass das Sicherheitselement auf der Seite, auf der die Beschichtung aus dem Material, das einen optisch variablen Effekt aufweist eine oder mehrere partielle Beschichtungen aus einer Schicht mit im sichtbaren Licht transparenten und im UV- Licht fluoreszierenden Farben (Pigmenten??) aufweist. The invention therefore relates to a security element which has a coating of a material which has an optically variable effect, in particular a color shift effect and recognizable recesses in the transmitted light, wherein the security element comprises a carrier substrate and a partial layer with recesses and a color shift effect causing layer structure , characterized in that the security element on the side on which the coating of the material having an optically variable effect comprises one or more partial coatings of a layer of transparent in visible light and fluorescent in UV light colors (pigments ??) having.
In einer Ausführungsform kann der einen optisch variablen Effekt, insbesondere einen Farbkippeffekt aufweisende Schichtaufbau ein Trägersubstrat und eine partielle Schicht mit Aussparungen umfassen, wobei die partielle Schicht T EP2015/002377 In one embodiment, the layer structure comprising an optically variable effect, in particular a color-shift effect, may comprise a carrier substrate and a partial layer with recesses, wherein the partial layer T EP2015 / 002377
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gebildet ist aus einer opaken Beschichtung, die auf der, der Beschichtung aus dem Material, das einen optisch variablen Effekt aufweist, zugewandten, Seite lichtabsorbierende Eigenschaften aufweist und auf der, der Beschichtung aus dem Material das einen optisch variablen Effekt aufweist, abgewandten Seite eine metallische Färbung aufweist, wobei die partielle opake Beschichtung aus einer lichtabsorbierenden metallischen Schicht und einer reflektierenden metallischen Schicht besteht. is formed of an opaque coating on the, the coating of the material having an optically variable effect, side facing light-absorbing properties and on the, the coating of the material having an optically variable effect, the side facing away from a metallic Coloring, wherein the partial opaque coating consists of a light-absorbing metallic layer and a reflective metallic layer.
Das Material, das einen optisch variablen Effekt aufweist, kann eine Druckfarbe sein, die Pigmente aus flüssigkristallinem Material enthält. Insbesondere bestehen die Pigmente aus cholesterischen oder einer Mischung aus nematischen und cholesterischen Flüssigkristallen. The material having an optically variable effect may be an ink containing pigments of liquid crystal material. In particular, the pigments consist of cholesteric or a mixture of nematic and cholesteric liquid crystals.
Ferner können optisch variable Interferenzpigmente (OVI-Pigmente) verwendet werden. Derartige Pigmente sind beispielsweise in US 2003/0207113 beschrieben.  Furthermore, optically variable interference pigments (OVI pigments) can be used. Such pigments are described, for example, in US 2003/0207113.
In einer weiteren Ausführungsform können irisierende Pigmente, beispielsweise Iriodine® Pigmente verwendet werden. Iriodine® basieren auf natürlich vorkommenden mineralischen Glimmerplättchen, die mit halbtransparenten Metalloxiden ummantelt sind. In another embodiment, iridescent pigments, for example, Iriodine ® pigments can be used. Iriodine ® is based on naturally occurring mineral mica flakes encased in semi-transparent metal oxides.
Weiters kann das Material, das einen optisch variablen Effekt aufweist, aus einem Flüssigkristallpolymer bestehen, das als Lösung der cholesterischen Monomere oder der Mischung aus cholesterischen und nematischen Monomeren aufgetragen und anschließend vernetzt wird. Die Vernetzung kann thermisch oder durch Behandlung mit UV- Strahlung oder Elektronenstrahlung erfolgen.  Furthermore, the material having an optically variable effect may consist of a liquid crystal polymer which is applied as a solution of the cholesteric monomers or the mixture of cholesteric and nematic monomers and then crosslinked. The crosslinking can be effected thermally or by treatment with UV radiation or electron radiation.
Bei einem derartigen Schichtaufbau sind bei der Betrachtung im Durchlicht die Aussparungen als deutlicher Kontrast gegenüber den Bereichen, die eine lichtabsorbierende und eine reflektierende metallische Schicht aufweisen, erkennbar. Durch die reflektierende metallische Schicht ist das Sicherheitselement, wenn es in ein Wertdokument eingebettet ist, auch im Auflicht von der Rückseite durch die Papieroberfläche nicht bzw. kaum erkennbar. Von der Rückseite sind im Durchlicht die Aussparungen aber deutlich erkennbar. Von der Vorderseite sind der optisch variable Effekt und die Aussparungen im Auf licht deutlich erkennbar. With such a layer structure, when viewed in transmitted light, the recesses can be seen as a clear contrast to the areas which have a light-absorbing and a reflective metallic layer. Due to the reflective metallic layer, the security element, if it is embedded in a value document, is also in the document Incident light from the back through the paper surface not or hardly recognizable. From the back, however, the recesses are clearly visible in transmitted light. From the front of the optically variable effect and the recesses in Auf Licht are clearly visible.
Als lichtabsorbierende metallische Schicht kommen vorzugsweise unstöchiometrisches Aluminiumoxid und stöchiometrisches oder unstöchiometrisches Kupferoxid in Frage. Die lichtabsorbierende metallische Schicht weist eine vorzugsweise dunkle bis schwarze Färbung auf. Je stärker die Absorption des Hintergrundsim sichtbaren Spektralbereich (350 - 800 nm), desto stärker der sichtbare optisch variable Effekt. As a light-absorbing metallic layer are preferably non-stoichiometric alumina and stoichiometric or unstoichiometric copper oxide in question. The light-absorbing metallic layer has a preferably dark to black coloration. The stronger the absorption of the background in the visible spectral range (350 - 800 nm), the stronger the visible optically variable effect.
Als reflektierende metallische Schicht kommen Metalle, wie AI, Sn, Cu, Zn, Pt, Au, Ag, Cr, Ti, Mo, Fe, Pd, Ni, Co oder deren Legierungen, beispielsweise Cu/Al in Frage. As a reflective metallic layer, metals such as Al, Sn, Cu, Zn, Pt, Au, Ag, Cr, Ti, Mo, Fe, Pd, Ni, Co or their alloys, for example Cu / Al in question.
In einer besonderen Ausführungsform kann die lichtabsorbierende metallische Schicht aus unstöchiometrischem Aluminiumoxid, vorzugsweise mit einem Sauerstoffgehalt von etwa 19 - 58 at%, und die reflektierende metallische Schicht aus Aluminium bestehen. In a particular embodiment, the light-absorbing metallic layer may consist of unstoichiometric alumina, preferably having an oxygen content of about 19-58 at%, and the reflective metallic layer of aluminum.
Die Aussparungen in der lichtabsorbierenden metallischen Schicht und der reflektierenden metallischen Schicht sind vollkommen deckungsgleich und können in Form von Zeichen, Buchstaben, Ziffern, Bildern, Symbolen, Linien, Guillochen und dergleichen vorliegen. Auch Kombinationen dieser Formen sind möglich. The recesses in the light absorbing metallic layer and the reflective metallic layer are perfectly congruent and may be in the form of characters, letters, numbers, images, symbols, lines, guilloches, and the like. Also combinations of these forms are possible.
Die Aussparungen können auch in negativer Form vorliegen, das heißt, dass beispielsweise der Bereich um ein Zeichen, einen Buchstaben und dergleichen die Aussparung bildet. EP2015/002377 The recesses may also be in negative form, that is, for example, the area around a character, a letter and the like forms the recess. EP2015 / 002377
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In einer weiteren Ausführungsform kann der einen optisch variablen Effekt aufweisende Schichtaufbau aus jeweils mindestens einer elektromagnetische Wellen reflektierenden Schicht, einer polymeren Abstandsschicht und einer Schicht gebildet von metallischen Clustern bestehen. In a further embodiment, the layer structure having an optically variable effect can consist of at least one electromagnetic wave reflecting layer, one polymeric spacing layer and one layer of metallic clusters.
Dabei wird eine elektromagnetische Wellen reflektierende Schicht auf ein Trägersubstrat aufgebracht. Diese Schicht kann vorzugsweise aus Metallen, wie beispielsweise Aluminium, Gold, Chrom, Silber, Kupfer, Zinn, Platin, Nickel oder Tantal, aus Halbleitern, wie beispielsweise Silizium, und deren Legierungen, beispielsweise Nickel/Chrom, Kupfer/Aluminium und dergleichen oder einer Druckfarbe mit Metallpigmenten bestehen. In this case, an electromagnetic wave-reflecting layer is applied to a carrier substrate. This layer may preferably be made of metals such as aluminum, gold, chromium, silver, copper, tin, platinum, nickel or tantalum, of semiconductors such as silicon, and their alloys, for example nickel / chromium, copper / aluminum and the like or a Printing ink with metal pigments exist.
Die elektromagnetische Wellen reflektierende Schicht wird vollflächig oder partiell durch bekannte Verfahren, wie Sprühen, Bedampfen, Sputtern, oder beispielsweise als Druckfarbe durch bekannte Druckverfahren (Tief-, Flexo-, Sieb-, Digitaldruck), durch Lackieren, Walzenauftragsverfahren, Schlitzdüsen- (Slot-Eye), Tauch- (roll dip coating) oder Vorhangauftragsverfahren (curtain coating) und dergleichen aufgebracht.  The electromagnetic wave reflecting layer is wholly or partially by known methods, such as spraying, vapor deposition, sputtering, or for example as a printing ink by known printing (gravure, flexo, screen, digital printing), by painting, roller application method, slot nozzle (slot). Eye), roll dip coating or curtain coating method and the like.
Die darauf folgende polymere Abstandschicht bzw. die polymeren Abstandsschichten können ebenfalls vollflächig oder vorzugsweise partiell aufgebracht werden.  The following polymeric spacer layer or the polymeric spacer layers can also be applied over the whole area or preferably partially.
Die polymeren Schichten bestehen beispielsweise aus konventionell oder Strahlungshärtenden, insbesondere UV-härtenden, Färb- oder Lacksystemen auf Basis von Nitrocellulose, Epoxy- Polyester- Kolophonium-, Acrylat-, Alkyd-, Melamin-, PVA-, PVC-, Isocyanat-, Urethan- oder PS-Copolymersystemen . Auf die polymere Schicht wird anschließend eine vollflächige oder partielle Schicht, gebildet 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. Die fluoreszierenden Farben weisen erfindungsgemäß im sichtbaren Licht eine hohe Transparenz auf und beeinträchtigen so das Erscheinungsbild des optisch variablen Elements nicht. The polymeric layers consist for example of conventional or radiation-curing, in particular UV-curing, dye or paint systems based on nitrocellulose, epoxy polyester rosin, acrylate, alkyd, melamine, PVA, PVC, isocyanate, urethane or PS copolymer systems. On the polymeric layer is then applied a full-area or partial layer formed of metallic clusters. 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. The fluorescent colors according to the invention have a high transparency in visible light and thus do not affect the appearance of the optically variable element.
Bei Betrachtung unter UV-Licht sind die fluoreszierenden Farben dann deutlich (über dem optisch aktiven Effekt) erkennbar.  When viewed under UV light, the fluorescent colors are then clearly visible (above the optically active effect).
In einer bevorzugten Ausführungsform sind die fluoreszierenden Farben auf den optisch aktiven Effekt abgestimmt. So können beispielsweise bei einem Farbkippeffekt von goldfarben zu grün fluoreszierende Farben in gelb und grün auf dem Sicherheitselement vorhanden sein, analog bei einem Farkippeffekt von rot zu blau, Fluoreszenzfarben in rot und blau.  In a preferred embodiment, the fluorescent colors are tuned to the optically active effect. Thus, for example, in the case of a color-shift effect from gold-to-green, fluorescent colors in yellow and green can be present on the security element, analogous to a farking effect from red to blue, fluorescent colors in red and blue.
Es ist jedoch auch möglich zum Farbkippeffekt kontrastierende bzw. mehr als zwei unterschiedliche Fluoreszenzfarbeh zu wählen. Gegebenenfalls können die Fluoreszenzfarben auch in Form eines sogenannten Regenbogenlayouts angeordnet sein.  However, it is also possible for the color-shift effect to select contrasting or more than two different fluorescence colors. If appropriate, the fluorescent colors can also be arranged in the form of a so-called rainbow layout.
In einer weiteren bevorzugten Ausführungsform können die Fluoreszenzfarben balkenförmig in abwechselnder Abfolge auf dem Sicherheitselement vorhanden sein, wobei die Ausdehnung der einzelnen unterschiedlichen Fluoreszenzfarben mit den im Durchlicht erkennbaren Aussparungen korrespondieren kann. In a further preferred embodiment, the fluorescent colors can be present in the form of bars in an alternating sequence on the security element, wherein the extent of the individual different fluorescent colors can correspond to the recesses recognizable in the transmitted light.
Die fluoreszierende Beschichtung ist erfindungsgemäß so beschaffen, dass sie im sichtbaren Licht vollkommen transparent erscheint. The fluorescent coating according to the invention is such that it appears completely transparent in visible light.
Zur Herstellung dieser Beschichtung werden transparente fluoreszierende Farbstoffe in einem geeigneten Lösungsmittel, beispielsweise Dlacetonalkohol, i-Propylalkohol, Ethanol, Ethoxypropanol, onoethylenglykol, Methoxypropanol, Methoxydipropanol, n-Propanol, ethoxybutanol, n-Butanol, Ethoxypropanol, Butylglykol, Hexan, Cyclopentanon, Aceton, Ethylacetat, Butylacetat, Cyclohexanon, I-Propylacetat, Metyhlethylketon, Methoxypropylacetat, n- Propylacetat, Spezialbenzin, Toluol, Wasser, Xylol, Methylisobutylketon bei erhöhter Temperatur, vorzugsweise bis zur Siedetemperatur des Lösungsmittels gelöst. Sobald der Farbstoff vollständig gelöst ist, wird das Gemisch in einen transparenten Standardlack eingerührt. Als transparente Standardlackzusammensetzungen kommen beispielsweise Lacke auf Basis von Nitrocellulose, PE-Acrylat, PET-Acrylat, Urethan-Acrylat, PVC, PMMA Ethylenacrylatcopolymeren, Styrolacrylaten oder Epoxyacrylat, PET, PC in Frage. To prepare this coating, transparent fluorescent dyes are dissolved in a suitable solvent, for example dlacetone alcohol, i-propyl alcohol, ethanol, ethoxypropanol, ethylene glycol, methoxypropanol, methoxydipropanol, n-propanol, ethoxybutanol, n-butanol, ethoxypropanol, butylglycol, hexane, cyclopentanone, acetone, Ethyl acetate, butyl acetate, cyclohexanone, I-propyl acetate, Metyhlethylketon, methoxypropyl acetate, n-propyl acetate, special gasoline, toluene, water, xylene, methyl isobutyl ketone at elevated temperature, preferably up to the boiling temperature of Solvent solved. Once the dye is completely dissolved, the mixture is stirred into a transparent standard paint. Suitable transparent standard coating compositions are, for example, nitrocellulose-based paints, PE acrylate, PET acrylate, urethane acrylate, PVC, PMMA ethylene acrylate copolymers, styrene acrylates or epoxy acrylate, PET, PC.
Als transparente fluoreszierende Farbstoffe kommen vor allem organische fluoreszierende Farbstoffe in Frage. Besonders geeignet sind organische fluoreszierende Farbstoffe beispielsweise auf Basis von Chelaten, Oxinaten, Derivaten der Therphthalsäure, der Anthranilsäure, ob Benzimidazol, Particularly suitable as transparent fluorescent dyes are organic fluorescent dyes. Particularly suitable are organic fluorescent dyes, for example based on chelates, oxinates, derivatives of thermophthalic acid, anthranilic acid, whether benzimidazole,
Benzthiazol, Benzoxazinon, Quinazolinon, oder von Thioxanthen, der  Benzothiazole, benzoxazinone, quinazolinone, or thioxanthene, the
Salicylsäure, organische Komplexe von Seltenerdmetallen, insbesondere Pigmente aus der Lumilux® - Serie (Honeywell), beispielsweise Lumilux® CD 335, Lumilux® CD 740, Lumilux® CD 340, Lumilux® Red CD 335, Lumilux® Red CD 332 (rote Fluoreszenz), optische Aufheller, wie Tinopal® OB, Lumilux® Blue CD 302, Lumilux® Blue CD 311 , Lumilux® Blue 710, Lumilux® Blue CD 310 (blaue Fluoreszenz), Lumilux® CD 702, Lumilux® Green CD 302, Lumilux® Green CD 708, Lumilux® Green CD 308, Lumilux® Green CD 396 (grüne Salicylic acid, organic complexes of rare earth metals, in particular pigments from the Lumilux ® - series (Honeywell), such as Lumilux ® CD 335, Lumilux ® CD 740, Lumilux ® CD 340, Lumilux ® Red CD 335, Lumilux ® Red CD 332 (red fluorescence) , optical brighteners, as Tinopal® OB, Lumilux CD ® Blue 302 Blue ® Lumilux CD 311, Lumilux ® Blue 710 Blue ® Lumilux CD 310 (blue fluorescence), Lumilux CD 702 ®, Lumilux Green CD 302 ®, Lumilux Green ® CD 708, lumilux ® green CD 308 lumilux ® green CD 396 (green
Fluoreszenz) oder Lumilux® CD 792, Lumilux® CD 797, Lumilux® CD 782, Lumilux® CD 382 (gelbgrüne Fluoreszenz). Fluorescence) or ® Lumilux CD 792, CD 797 Lumilux ®, ® Lumilux CD 782, CD 382 ® Lumilux (yellow-green fluorescence).
Die Intensität der Fluoreszenz ist abhängig von der Konzentration an gelöstem Farbstoff im Lack. Die größte Intensität wird daher bei Erreichung der Löslichkeitsgrenze bei Siedetemperatur des verwendeten Lösungsmittels erzielt. Je nach Konzentration des Farbstoffs können beliebige Abstufungen der Intensität erreicht werden.  The intensity of fluorescence depends on the concentration of dissolved dye in the paint. The greatest intensity is therefore achieved when the solubility limit at the boiling point of the solvent used is reached. Depending on the concentration of the dye, any desired levels of intensity can be achieved.
Als Trägersubstrate kommen beispielsweise Trägerfolien vorzugsweise transparente flexible Kunststofffolien, beispielsweise aus PI, PP, MOPP, PE, PS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC, PTFE, ETFE (Ethylentetrafluorethylen), PFA (Tetrafluorethylen-Perfluorpropylvinylether-Fluorcopolymer), MFA (Tetrafluor- methylen-Perfluorpropylvinylether-Fluorcopolymer), PTFE (Polytetra- fluorethylen), PVF (Polyvinylfluorid), PVDF (Polyvinylidenfluorid), und EFEP (Ethylen-Tetrafluorethylen-Hexafluorpropylen-Fluorterpolymer) in Frage. As carrier substrates, for example carrier films are preferably transparent flexible plastic films, for example, from PI, PP, MOPP, PE, PS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC, PTFE, ETFE (ethylene tetrafluoroethylene), PFA (tetrafluoroethylene-perfluoropropyl vinyl ether fluorocopolymer), MFA (tetrafluoromethylene-perfluoropropyl vinyl ether fluorocopolymer), PTFE (polytetrafluoroethylene), PVF (polyvinyl fluoride), PVDF (polyvinylidene fluoride), and EFEP (ethylene-tetrafluoroethylene-hexafluoropropylene fluoropolymer).
Die Trägerfolien weisen vorzugsweise eine Dicke von 5 - 700 μηη, bevorzugt 5 - 200 μιτι, besonders bevorzugt 5 - 50 μηη auf.  The carrier films preferably have a thickness of 5 to 700 μm, preferably 5 to 200 μm, particularly preferably 5 to 50 μm.
Das erfindungsgemäße Sicherheitselement kann auch weitere Sicherheitsmerkmale aufweisen, die in weiteren Schichten vorliegen können. Diese Sicherheitsmerkmale beispielsweise können bestimmte chemische, physikalische und auch optische oder optische aktive Eigenschaften aufweisen. The security element according to the invention can also have further security features which can be present in further layers. These security features, for example, can have certain chemical, physical and also optical or optical active properties.
Zur Einstellung der magnetischen Eigenschaften einer Schicht 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 of a layer, 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.
Besonders geeignet sind Magnetpigmentfarben mit Pigmenten auf Basis von Fe-oxiden, Eisen, Nickel Cobalt und deren Legierungen, Barium oder Cobalt- ferrite, hart- und weich magnetische Eisen- und Stahlsorten in wässrigen bzw. lösungsmittelhaltigen Dispersionen. Als Lösungsmittel kommen beispielsweise i-Propanol, Ethylacetat, Methylethylketon, Methoxypropanol und deren Mischungen in Frage. Particularly suitable are magnetic pigment paints with pigments based on Fe oxides, iron, nickel cobalt and their alloys, barium or cobalt ferrites, hard and soft magnetic iron and steel grades in aqueous or solvent-containing dispersions. Examples of suitable solvents are i-propanol, ethyl acetate, methyl ethyl ketone, methoxypropanol and mixtures thereof.
Vorzugsweise sind die Pigmente in Acrylat- Polymerdispersionen mit einem Molekulargewicht von 150.000 bis 300.000, in Nitrocellulose, Acrylat-Urethan- Dispersionen, Acrylat- Styrol oder PVC-haltigen Dispersionen oder in lösemittelhaltige derartige Dispersionen eingebracht.  The pigments are preferably incorporated in acrylate polymer dispersions having a molecular weight of from 150,000 to 300,000, in nitrocellulose, acrylate-urethane dispersions, acrylate-styrene or PVC-containing dispersions or in solvent-containing dispersions of this type.
Die magnetische Schicht kann auch eine Codierung aufweisen. Dabei können sowohl magnetische Materialien gleicher Koerzitivtät und/oder Remanenz, als auch unterschiedlicher Koerzitivität und/oder Remanenz zur Bildung der Codierung verwendet werden. The magnetic layer may also have a coding. Both magnetic materials of the same coercivity and / or remanence, as also different coercivity and / or remanence can be used to form the coding.
In einer weiteren Ausführungsform kann die reflektierende metallische Schciht selbst magnetische Eigenschaften aufweisen. Die wird beispielsweise durch die Verwendung eines magnetischen Materials, wie Fe, Ni, Co, erreicht.  In a further embodiment, the reflective metallic layer may itself have magnetic properties. This is achieved, for example, by the use of a magnetic material such as Fe, Ni, Co.
Die optischen Eigenschaften der Schicht lassen sich durch sichtbare Farbstoffe bzw. Pigmente, wärmeempfindliche Farben bzw. Pigmente beeinflussen. Diese sind einzeln bzw. in allen möglichen Kombinationen einsetzbar. The optical properties of the layer can be influenced by visible dyes or pigments, heat-sensitive inks or pigments. These can be used individually or in all possible combinations.
Unter optisch aktiven Merkmalen, werden hier Beugungsstrukturen, Beugungsgitter, Kinegramme, Hologramme, DID® (Mikrostrukturen 0. Ordnung in Verbindung mit Dünnschichten) verstanden. Among optically active characteristics are here diffraction structures, diffraction gratings, kinegrams, holograms, DID understood ® (0th order in conjunction with thin films microstructures).
Diese optisch aktiven Merkmale können beispielsweise durch bekannte UV- Prägeverfahren, wie sie beispielsweise in EP 1 310 381 A beschrieben sind oder durch Heißprägeverfahren hergestellt werden  These optically active features can be produced, for example, by known UV embossing processes, as described, for example, in EP 1 310 381 A or by hot embossing processes
Um das Sicherheitselement im oder am Wertdokument zu verankern, wird dieses üblicherweise ein- oder beidseitig mit einer Klebebeschichtung versehen. Diese Klebebeschichtung kann entweder in Form einer Heißsiegel-, Kaltsiegel- oder Selbstklebebeschichtung ausgeführt sein. Der Kleber kann auch pigmentiert sein, wobei als Pigmente alle bekannte Pigmente oder Farbstoffe, beispielsweise ΤΊΟ2, ZnS, Kaolin, ATO, FTO, Aluminium, Chrom- und Siliziumoxide oder beispielsweise organische Pigmente wie Pthalocyaninblau, i-lndolidgelb, Dioxazinviolett und dergleichen verwendet werden können. Ferner können lumineszierende Farbstoffe bzw. Pigmente, die im sichtbaren, im UV-Bereich oder im IR-Bereich fluoreszieren bzw. phosphoreszieren, wärmeempfindliche Farben bzw. Pigmente zugegeben werden. Diese sind in allen möglichen Kombinationen einsetzbar. Zusätzlich können auch lumineszierende Pigmente allein oder in Kombination mit anderen Farbstoffen und/oder Pigmenten eingesetzt werden. Gegebenenfalls kann das Sicherheitselement auch noch durch eine oder mehrere Schutzlackschicht(en) geschützt werden, die pigmentiert oder unpigmentiert sein kann, oder beispielsweise durch Kaschieren oder dergleichen weiterveredelt werden. To anchor the security element in or on the document of value, this is usually provided on one or both sides with an adhesive coating. This adhesive coating can be carried out either in the form of a heat-seal, cold-seal or self-adhesive coating. The adhesive may also be pigmented, it being possible to use as pigments all known pigments or dyes, for example ΤΊΟ2, ZnS, kaolin, ATO, FTO, aluminum, chromium and silicon oxides or, for example, organic pigments such as pthalocyanine blue, i-indolold yellow, dioxazine violet and the like , Furthermore, it is possible to add heat-sensitive dyes or pigments to luminescent dyes or pigments which fluoresce or phosphoresce in the visible, in the UV region or in the IR region. These can be used in all possible combinations. In addition, luminescent pigments can also be used alone or in combination with other dyes and / or pigments. Optionally, the security element can also be protected by one or more protective lacquer layer (s), which may be pigmented or unpigmented, or further refined, for example, by laminating or the like.
In den Figuren 1 bis 4 sind Ausführungsformen des erfindungsgemäßen Sicherheitselements dargestellt. In the figures 1 to 4 embodiments of the security element according to the invention are shown.
Darin bedeuten Mean in it
1 ein Trägersubstrat,  1 a carrier substrate,
2 eine fluoreszierende Schicht  2 a fluorescent layer
3 eine LC Schicht  3 an LC layer
4 eine Haftvermittlerschicht  4 a primer layer
5 eine Klebebeschichtung  5 an adhesive coating
6 eine schwarze Metallisierung  6 a black metallization
7 eine schwarze Druckschicht  7 a black print layer
8 eine schwarze Ätzresistschicht  8 is a black etching resist layer
9 eine metallische Schicht, beispielsweise eine Aluminiumschicht  9 a metallic layer, for example an aluminum layer
10 eine Kaschierkleberschicht.  10 a laminating adhesive layer.
Das erfindungsgemäße Sicherheitselement ist für die zumindest teilweise Einbettung in oder Applikation auf Ausweisen, Karten, Banknoten oder Etiketten, Siegeln und dergleichen geeignet, aber auch als Verpackungsmaterial beispielsweise in der pharmazeutischen, der Elektronik- und/oder Lebensmittelindustrie, beispielsweise in Form von Blisterfolien, Faltschachteln, Abdeckungen, Folienverpackungen und dergleichen geeignet. Für die Anwendung als Sicherheitsmerkmale werden die Substrate bzw. Folienmaterialien bevorzugt in Streifen, Fäden oder Patches geschnitten, wobei die Breite der Streifen oder Fäden vorzugsweise 0,5 - 20 mm betragen kann und die Patches vorzugsweise mittlere Breiten bzw. Längen von 0,3 - 20 mm aufweisen. The security element according to the invention is suitable for at least partially embedding in or application on identity cards, cards, banknotes or labels, seals and the like, but also as packaging material, for example in the pharmaceutical, electronics and / or food industry, for example in the form of blister foils, cartons , Covers, foil packaging and the like. For use as security features, the substrates or film materials are preferably cut into strips, threads or patches, wherein the width of the strips or threads may preferably be 0.5-20 mm and the patches preferably have average widths or lengths of 0.3. 20 mm.
Für die Anwendung in oder auf Verpackungen wird das Folienmaterial bevorzugt in Streifen, Bänder, Fäden oder Patches geschnitten, wobei die Breite der der Fäden, Streifen bzw. Bänder vorzugsweise 0,5 - 50 mm beträgt und die Patches vorzugsweise mittlere Breiten und Längen von 2 - 30 mm aufweisen. For use in or on packaging, the film material is preferably cut into strips, tapes, threads or patches, the width of which of the threads, strips or tapes being preferably 0.5-50 mm and the patches preferably being average widths and lengths of 2 - 30 mm.

Claims

Patentansprüche: claims:
1 ) Sicherheitselement, das eine Beschichtung aus einem Material aufweist, das einen optisch variablen Effekt, insbesondere einen Farbkippeffekt und im Durchlicht erkennbare Aussparungen aufweist, wobei das Sicherheitselement ein Trägersubstrat und eine partielle Schicht mit Aussparungen sowie einen einen Farbkippeffekt hervorrufenden Schichtaufbau umfasst, dadurch gekennzeichnet, dass das Sicherheitselement auf der Seite, auf der die Beschichtung aus dem Material, das einen optisch variablen Effekt aufweist eine oder mehrere partielle Beschichtungen aus einer Schicht mit im sichtbaren Licht transparenten und im UV- Licht fluoreszierenden Farben aufweist. 1) security element comprising a coating of a material having an optically variable effect, in particular a color shift effect and recognisable recesses, wherein the security element comprises a carrier substrate and a partial layer with recesses and a color shift effect causing layer structure, characterized in that the security element on the side on which the coating of the material which has an optically variable effect has one or more partial coatings of a layer with visible-light-transparent and UV-fluorescent colors.
2) Sicherheitselement nach Anspruch 1 dadurch gekennzeichnet, dass der den optisch variablen Effekt, insbesondere den Farbkippeffekt hervorrufende Schichtaufbau, aus einer Beschichtung aus einem Material, das einem optisch variablen Effekt hervorruft und einer partiellen Schicht, die gebildet ist aus einer opaken Beschichtung, die auf der, der Beschichtung aus dem Material, das einen optisch variablen Effekt aufweist, zugewandten, Seite lichtabsorbierende Eigenschaften aufweist und auf der, der Beschichtung aus einem einen optisch variablen Effekt hervorrufenden Material abgewandten Seite, eine metallische Färbung aufweist, wobei die partielle opake Beschichtung aus einer lichtabsorbierenden metallischen Schicht und einer reflektierenden metallischen Schicht besteht. 2) Security element according to claim 1, characterized in that the optically variable effect, in particular the color shift effect causing layer structure, from a coating of a material which causes an optically variable effect and a partial layer which is formed of an opaque coating on the, the coating of the material having an optically variable effect facing side having light-absorbing properties and on which, the coating of an optically variable effect causing material side facing away, a metallic coloration, wherein the partial opaque coating of a light-absorbing metallic layer and a reflective metallic layer.
3) Sicherheitselement nach Anspruch 2, dadurch gekennzeichnet, dass das den optisch variablen Effekt hervorrufenden Material eine Flüssigkristallpolymerschicht gebildet aus cholesterischen oder einer Mischung aus cholesterischen und nematischen Flüssigkristallen ist. 4) Sicherheitselement nach Anspruch 2, dadurch gekennzeichnet, dass das den optisch variablen Effekt aufweisende Material eine Druckfarbe mit optisch variablen Pigmenten, ausgewählt aus cholesterischen oder einer Mischung aus nematischen und cholesterischen flüssigkristallinen Pigmenten, optisch variablen Interferenzpigmenten oder irisierenden Pigmenten ist. 3) A security element according to claim 2, characterized in that the optically variable effect causing material is a liquid crystal polymer layer formed from cholesteric or a mixture of cholesteric and nematic liquid crystals. 4) A security element according to claim 2, characterized in that the optically variable effect material comprising a printing ink with optically variable pigments selected from cholesteric or a mixture of nematic and cholesteric liquid crystalline pigments, optically variable interference pigments or iridescent pigments.
5) Sicherheitselement nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass die lichtabsorbierende metallische Schicht aus unstöchiometrischem Aluminiumoxid oder stöchiometrischem oder unstöchiometrischem Kupferoxid besteht. 5) A security element according to any one of claims 2 to 4, characterized in that the light-absorbing metal layer consists of unstoichiometric alumina or stoichiometric or unstoichiometric copper oxide.
6) Sicherheitselement nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass die reflektierende metallische Schicht aus AI, Sn, Cu, Zn, Pt, Au, Ag, Cr, Ti, Mo, Fe, Pd, Ni, Co oder deren Legierungen besteht. 6) Security element according to one of claims 2 to 5, characterized in that the reflective metallic layer of Al, Sn, Cu, Zn, Pt, Au, Ag, Cr, Ti, Mo, Fe, Pd, Ni, Co or their alloys consists.
7) Sicherheitselement nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, dass die im Durchlicht sichtbaren Aussparungen in Form von positiven oder negativen Zeichen, Buchstaben, Ziffern, Bildern, Symbolen, Linien, Guillochen, eines Punkt- oder Linienrasters oder eines Halbtonrasters vorliegen. 7) Security element according to one of claims 2 to 6, characterized in that the visible in transmitted light recesses in the form of positive or negative characters, letters, numbers, images, symbols, lines, guilloches, a dot or line grid or a halftone screen are present.
8) Sicherheitselement nach Anspruch 1, dadurch gekennzeichnet, dass der den optisch variablen Effekt, insbesondere den Farbkippeffekt hervorrufende Schichtaufbau, aus jeweils mindestens einer elektromagnetische Wellen reflektierenden Schicht, einer polymeren Abstandsschicht und einer Schicht gebildet von metallischen Clustern besteht. 9) Sicherheitselement nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die fluoreszierenden Farben aus organischen fluoreszierenden Farbstoffen bestehen. 8) A security element according to claim 1, characterized in that the optically variable effect, in particular the color shift effect causing layer structure consists of at least one electromagnetic wave reflecting layer, a polymeric spacer layer and a layer formed by metallic clusters. 9) Security element according to one of claims 1 to 6, characterized in that the fluorescent colors consist of organic fluorescent dyes.
10) Sicherheitselement nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die optische Erscheinung der fluoreszierenden Farben auf das Erscheinungsbild des optisch aktiven Sicherheitsmerkmals abgestimmt sind. 10) Security element according to one of claims 1 to 7, characterized in that the visual appearance of the fluorescent colors are matched to the appearance of the optically active security feature.
11 ) Sicherheitselement nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die fluoreszierenden Farben mit den Farben des optische aktiven Sicherheitselement korrespondieren. 11) Security element according to one of claims 1 to 8, characterized in that the fluorescent colors correspond with the colors of the optical active security element.
12) Sicherheitselement nach einem der Ansprüche 1 bis 9 dadurch gekennzeichnet, dass die fluoreszierenden Farben mit der Abfolge der Aussparungen abgestimmt sind. 12) Security element according to one of claims 1 to 9, characterized in that the fluorescent colors are matched with the sequence of recesses.
13) Sicherheitselement nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass das Sicherheitselement eine oder mehrere weitere partielle oder vollflächige Schichten mit optischen, optisch aktiven, elektrisch leitfähigen oder magnetischen Eigenschaften aufweist. 13) Security element according to one of claims 1 to 10, characterized in that the security element has one or more further partial or full-surface layers with optical, optically active, electrically conductive or magnetic properties.
14) Sicherheitselement nach Anspruch 11 , dadurch gekennzeichnet, dass die magnetische Schicht eine codierte magnetische Schicht ist. 14) A security element according to claim 11, characterized in that the magnetic layer is a coded magnetic layer.
15) Sicherheitselement nach Anspruch 10 oder 1 , dadurch gekennzeichnet, dass die magnetische Schicht aus magnetischen Materialien mit gleicher oder unterschiedlicher Koerzitivität und/oder Remanenz besteht. 15) A security element according to claim 10 or 1, characterized in that the magnetic layer consists of magnetic materials with the same or different coercivity and / or remanence.
16) Sicherheitselement nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass das Sicherheitselement ein- oder beidseitig mit einer oder mehreren pigmentierten oder unpigmentierten Schutzlackschicht(en) versehen ist. 16) Security element according to one of claims 1 to 13, characterized in that the security element on one or both sides with a or more pigmented or unpigmented protective lacquer layer (s) is provided.
17) Sicherheitselement nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass das Sicherheitselement ein- oder beidseitig mit einer pigmentierten oder unpigmentierten Heißsiegel-, Kaltsiegel- oder Selbstklebebeschichtung versehen ist. 17) Security element according to one of claims 1 to 14, characterized in that the security element is provided on one or both sides with a pigmented or unpigmented heat seal, cold seal or self-adhesive coating.
EP15812951.0A 2014-12-15 2015-11-26 Security element with colour shift effect and fluorescent features Active EP3233516B1 (en)

Applications Claiming Priority (2)

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ATA903/2014A AT516688A1 (en) 2014-12-15 2014-12-15 Security element with color shift effect and fluorescent features, process for its preparation and its use
PCT/EP2015/002377 WO2016096086A1 (en) 2014-12-15 2015-11-26 Security element with colour shift effect and fluorescent features and method for production and use of same

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EP3233516B1 EP3233516B1 (en) 2020-06-03

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AT516688A1 (en) 2016-07-15
US10214045B2 (en) 2019-02-26
WO2016096086A1 (en) 2016-06-23
US20170334235A1 (en) 2017-11-23

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