• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a security element comprising a carrier substrate, in each case at least one electromagnetic wave reflecting layer, a polymeric spacer layer and a layer formed by metallic clusters, wherein at least one surface of the carrier substrate has recesses by mechanical surface modification, wherein the mean depth of the recesses in the range of 1 to 10? 1m, and to this surface of the supporting substrate is deposited a thin film structure including a layer of metallic clusters, a polymeric transparent spacer layer, and an electromagnetic wave reflecting layer.
    公开号:AT515670A4
    申请号:T488/2014
    申请日:2014-06-23
    公开日:2015-11-15
    发明作者:Jürgen Dr Keplinger
    申请人:Hueck Folien Gmbh；
    IPC主号:
    专利说明:

    Security element with modified color-shift effect
    The invention relates to a security element, in particular for value documents, banknotes and the like, which has a modified color shift effect.
    From WO 02/18155 a method for counterfeit-proof marking of objects is known, wherein the article is applied with a mark consisting of an electromagnetic wave reflecting first layer on the electromagnetic wave transmissive layer having a defined thickness, whereupon on this layer from metallic clusters formed third layer follows, is provided.
    EP 1 716 007 B1 discloses security elements with optically variable layers which impart different color impressions at certain viewing angles and which have additional security levels in addition to this color-shift effect in the color-shift effect setup.
    WO 2006/040069 A discloses a security element for protecting valuables with an optically variable layer, which likewise gives different color impressions at different viewing angles. In addition, a semitransparent ink layer is arranged in a limited coverage area over the optically variable layer, the color impression of which is adapted to the color impression of the optically variable layer under predetermined viewing conditions.
    EP 2 420 391 A discloses a security element having an optically variable layer which has different color impressions at different viewing angles, wherein a colored metallic layer is arranged in a defined area above or next to the optically variable layer, the color impression of this layer the color impression of the optically variable layer is adjusted under a defined viewing angle.
    The object of the present invention was to provide a new tamper-proof security element for value documents, bank notes and the like, which has an increased security against counterfeiting and a modified color shift effect.
    The invention therefore relates to a security element comprising a carrier substrate, in each case at least one electromagnetic wave reflecting layer, a polymeric spacer layer and a layer formed by metallic clusters, characterized in that at least one surface of the carrier substrate by surface modification has recesses, wherein the average depth of the recesses is in the range of 1 to 10 microns and on this surface of the support substrate, a thin film structure comprising a layer of metallic clusters, a polymeric transparent spacer layer and an electromagnetic wave reflecting layer, is applied.
    Due to the surface modification, the polymeric transparent spacer layer, which is responsible for the generation of the viewing angle-dependent color-shift effect, can not be applied by the depressions with a uniform thickness over the entire surface.
    As a result, the thickness of the spacer layer is modified in areas. Depending on the extent of the modification, either a different color-shift effect then occurs in these areas or, with a correspondingly high reduction or a large increase in the thickness of the spacer layer, no visually discernible color-shift effect occurs any more. the color shift effect produced by the structure applied to the support film is suppressed or canceled by the modification of the thickness of the spacer layer by the recesses
    As a result, different color-shift effects occur over the entire surface or the color-shift effect is partially extinguished.
    As carrier substrates, for example carrier films are preferably flexible plastic films, for example of PI, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC , 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 μm, preferably 5 to 200 μm, more preferably 5 to 50 μm.
    Particular preference is given to using PET films.
    These plastic films are surface-modified to create depressions. This is preferably done mechanically, by brushing or embossing.
    The brushing can be present in the transverse or longitudinal direction, and / or in the form of motifs or circular brushing, the brushing depth being advantageously 1 to 10 μm, preferably 1 to 5 μm.
    The distances between the depressions formed by the brushing are advantageously 1 to 50 μm.
    Furthermore, brushed or embossed 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 serve as the carrier substrate.
    Alternatively, the surface modification may also be chemical, for example by etching and the like.
    Subsequently, a full-area or partial layer formed of metallic clusters is applied to the carrier substrate. The metallic clusters can consist, for example, of aluminum, gold, palladium, platinum, chromium, silver, copper, nickel, tantalum, tin and the like or their alloys, such as, for example, Au / Pd, Cu / Ni or Cr / Ni.
    Preferably, cluster materials can also be applied, for example semiconducting elements of III. to VI. Major or II subgroup whose plasmon excitation is externally triggerable (e.g., via X-ray or ionic radiation or electromagnetic interactions). Thus, when viewed with a suitable reader, a change in the color spectrum (e.g., intensity change) or blinking of the color-shift effect becomes visible.
    The cluster layer may also have additional properties, for example electrically conductive, magnetic or fluorescent properties. For example, a cluster layer of Ni, Cr / Ni, Fe or core-shell structures with these materials or mixtures of these materials with the cluster materials mentioned above has such additional features. Inter alia, by core-shell structures, fluorescent clusters can also be prepared, e.g. using Quantum Dots® from Quantum Dot Corp.
    The polymeric spacer layer following the layer formed of metallic clusters consists for example of physically 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.
    The recesses produced by surface modification do not make the polymeric transparent spacer layer uniform in thickness.
    The thickness of the layer is in each case dependent on the depth of the depressions and can vary within a wide range. Preferably, the spacer layer has a nominal thickness in a range of 10 nm to 3 μιτι. Nominal thickness is understood to be the layer thickness which is achieved on a smooth surface for a given use of material.
    In essence, the thickness of the spacer layer over the entire area may also be less than 10 nm to greater than 3 μm in regions.
    An electromagnetic wave reflecting layer is applied to the polymeric spacer layer. 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. Alternatively, it is also possible to apply layers with a high refractive index, so-called HRI layers.
    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). The), roll dip coating or curtain coating method and the like are applied. For partial application, in particular known demetallization processes are suitable.
    The thickness of the electromagnetic wave reflecting layer is preferably about 10-50 nm, but also higher or lower layer thicknesses are possible.
    In a further embodiment, the polymeric waveguide layer can first be applied to the carrier substrate and then the polymeric spacer layer can be applied to the electromagnetic waveguide layer and the metallic clusters layer can be applied to this spacer layer (direct setup).
    Furthermore, the thin-film structure present on the security element according to the invention can be combined with further functional layers which have, for example, magnetic, electrically conductive, physical, optical or optically active properties.
    As layers having magnetic properties, layers containing paramagnetic, diamagnetic and also ferromagnetic substances, such as iron, nickel and cobalt or their alloys, their compounds or salts (for example oxides or sulfides), barium or cobalt-ferrite, hard and soft magnetic iron and steel grades used.
    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 region or in the IR region, effect pigments, such as liquid crystals, pearlescent, bronzes and / or multilayers Color change pigments and heat-sensitive colors or pigments influence. These can be used individually or in all possible combinations.
    As electrically conductive layers, layers that include graphite, carbon black, conductive organic or inorganic polymers. Metal pigments (for example copper, aluminum, silver, gold, iron, chromium and the like), metal alloys such as copper-zinc or copper-aluminum or else amorphous or crystalline ceramic pigments such as ITO and ATO, doped or non-doped semiconductors such as silicon, germanium or ionic conductors such as amorphous or crystalline metal oxides or metal sulfides, are used.
    Optically active structures are, for example, diffractive structures, diffraction structures, surface reliefs, holograms, kinegrams and the like.
    To protect the layer structure, the security element can be provided on one or both sides with a protective lacquer layer or be laminated on one or both sides.
    Optionally, the security element may further be provided on one or both sides with an adhesive coating, for example a self-adhesive hot or cold coating.
    In the figures 1 to 3 embodiments of the invention are shown.
    In the figures, 1 means the carrier substrate having recesses 2, an electromagnetic wave reflecting layer 3, a spacer layer 4, a layer formed by metallic clusters 5, a protective varnish layer.
    FIG. 1 shows a so-called direct structure of the security element according to the invention.
    Here, on the surface-modified carrier substrate 1, only the electromagnetic wave reflecting layer 2, on this electromagnetic wave reflecting layer 2, the spacer layer 3 and on the spacer layer 3, the layer formed of metallic clusters 4 applied. The structure is provided with a protective lacquer layer 5.
    FIG. 2 shows a so-called indirect construction of the security element according to the invention.
    In this case, the layer formed of metallic clusters 4 on this layer of metallic clusters 4, the spacer layer 3 and on the spacer layer 3, the electromagnetic wave reflecting layer 2 is applied to the surface-modified carrier substrate 1. The structure is provided with a protective lacquer layer 5.
    In this case, the color shift effect can be recognized by the transparent carrier substrate.
    FIG. 3 shows a direct structure of the security element according to the invention, wherein the carrier substrate 1 is surface-modified only partially, that is to say partially.
    The security element according to the invention is suitable for securing valuable documents, such as identification 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, folding boxes, covers, Foil packaging and the like suitable. 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.
    In this case, the security element can at least partially be embedded in the value document or applied to it. 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. 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.
    权利要求:
    Claims (14)
    [1]
    1. A security element comprising a carrier substrate, in each case at least one electromagnetic wave reflecting layer, a polymeric spacer layer and a layer formed by metallic clusters, characterized in that at least one surface of the carrier substrate by mechanical surface modification has recesses, wherein the average depth of the recesses in Range of 1 to 10 pm and on this surface of the carrier substrate, a thin film structure containing a layer of metallic clusters, a polymeric transparent spacer layer and an electromagnetic wave reflecting layer, is applied.
    [2]
    2. Security element according to claim 1, characterized in that brushed plastic films or brushed or embossed metal foils are used as the carrier substrate.
    [3]
    3. Security element according to one of claims 1 to 2, characterized in that the brushing is present in the longitudinal or transverse direction and / or in the form of motifs or as Kreisbürstung.
    [4]
    4. Security element according to claim 1, characterized in that the carrier substrate used are chemically surface-modified plastic or metal foils.
    [5]
    5. Security element according to one of claims 1 to 5, characterized in that on the carrier substrate, a thin film element is applied with the following layer sequence: a) a layer of metallic clusters, b) on this layer of metallic clusters, a polymeric transparent spacer layer and c) on this polymeric transparent spacer layer an electromagnetic wave reflecting layer.
    [6]
    6. Security element according to one of claims 1 to 5, characterized in that on the carrier substrate, a thin film element is applied with the following layer sequence: a) an electromagnetic wave reflecting layer, b) on this electromagnetic wave reflecting layer, a polymeric transparent spacer layer and c) this polymeric transparent spacer layer is a layer of metallic clusters.
    [7]
    7. The security element according to one of claims 1 to 7, characterized in that the metallic cluster layer of aluminum, gold, palladium, platinum, chromium, silver, copper, nickel, tantalum, tin their alloys, such as Au / Pd, Cu / Ni or Cr / Ni, exists.
    [8]
    8. A security element according to any one of claims 1 to 8, characterized in that the polymeric spacer layer of radiation-curable, such as UV-curing or physically drying, paint or coating systems based on nitrocellulose, epoxy, polyester, rosin, acrylate, Alkyd, melamine, PVA, PVC, isocyanate, urethane or PS copolymer systems.
    [9]
    9. Security element according to one of claims 1 to 9, characterized in that the nominal thickness of the spacer layer is 10 nm to 3 pm.
    [10]
    10. Security element according to one of claims 1 to 10, characterized in that the electromagnetic wave reflecting layer is a reflective metallic layer or an HRI layer.
    [11]
    11. Security element according to one of claims 1 to 11, characterized in that it comprises further functional layers with electrically conductive, magnetic, optical or optically active properties.
    [12]
    12. Security element according to one of claims 1 to 12, characterized in that it is provided on one or both sides with a protective lacquer layer or laminated.
    [13]
    13. Security element according to one of claims 1 to 13, characterized in that it is provided on one or both sides with an adhesive coating.
    [14]
    14. Use of the security element according to one of claims 1 to 14 for securing documents of value, such as identity cards, cards, banknotes or labels, seals or as or on packaging.
    类似技术:
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    同族专利:
    公开号 | 公开日
    EP2960068B1|2017-07-19|
    EP2960068A1|2015-12-30|
    AT515670B1|2015-11-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2002020280A1|2000-09-08|2002-03-14|Giesecke & Devrient Gmbh|Data support with an optically variable element|
    WO2004014663A1|2002-08-06|2004-02-19|Hueck Folien Ges.M.B.H.|Method for producing tamper-proof identification elements|
    DE10243863A1|2002-08-13|2004-02-26|Giesecke & Devrient Gmbh|Data carrier, e.g. a banknote, with at least a security marking area to prevent counterfeiting in the form of an optically variable embossed structure with optically varying coatings arranged over the embossed area|
    WO2004022355A2|2002-08-13|2004-03-18|Giesecke & Devrient Gmbh|Data carrier comprising an optically variable structure|
    DE102004046695A1|2004-09-24|2006-03-30|Giesecke & Devrient Gmbh|Optically variable security element|
    AT505452A1|2007-04-16|2009-01-15|Hueck Folien Gmbh|FALSE-SAFE IDENTIFICATION FEATURE|
    DE10042461C2|2000-08-29|2002-11-07|November Ag Molekulare Medizin|Method for counterfeit-proof marking of objects and counterfeit-proof marking|
    AT504587A1|2004-02-16|2008-06-15|Hueck Folien Gmbh|IMPACT-SAFE SAFETY FEATURE WITH COLOR TIP EFFECT|
    DE102004049118A1|2004-10-07|2006-04-13|Giesecke & Devrient Gmbh|Security element and method for its production|
    DE102005021514B4|2005-05-10|2020-10-29|Giesecke+Devrient Currency Technology Gmbh|Security element and process for its production|
    AT507647B1|2008-12-11|2011-06-15|Hueck Folien Gmbh|TRANSPARENT SAFETY ELEMENT|
    AT510220B1|2010-07-19|2013-07-15|Hueck Folien Gmbh|SECURITY ELEMENT WITH AN OPTICAL VARIABLE LAYER|DE102018009912A1|2018-12-17|2020-06-18|Giesecke+Devrient Currency Technology Gmbh|Method for producing an optically variable security element|
    法律状态:
    2022-02-15| MM01| Lapse because of not paying annual fees|Effective date: 20210623 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA488/2014A|AT515670B1|2014-06-23|2014-06-23|Security element with modified color-shift effect|ATA488/2014A| AT515670B1|2014-06-23|2014-06-23|Security element with modified color-shift effect|
    EP15001150.0A| EP2960068B1|2014-06-23|2015-04-20|Security element with modified colour shift effect|
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