EP3760450B1 - Élément de sécurité pour un document de valeur - Google Patents

Élément de sécurité pour un document de valeur Download PDF

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Publication number
EP3760450B1
EP3760450B1 EP19184053.7A EP19184053A EP3760450B1 EP 3760450 B1 EP3760450 B1 EP 3760450B1 EP 19184053 A EP19184053 A EP 19184053A EP 3760450 B1 EP3760450 B1 EP 3760450B1
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EP
European Patent Office
Prior art keywords
layer
oxide
security element
refractive index
fluoride
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EP19184053.7A
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German (de)
English (en)
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EP3760450A1 (fr
EP3760450C0 (fr
Inventor
Martin EGGINGER
Gottfried Brandstetter
Marco Mayrhofer
Andreas WEINBERGER
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Hueck Folien GmbH
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Hueck Folien GmbH
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Priority to EP19184053.7A priority Critical patent/EP3760450B1/fr
Priority to PCT/EP2020/068649 priority patent/WO2021001475A1/fr
Publication of EP3760450A1 publication Critical patent/EP3760450A1/fr
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Publication of EP3760450C0 publication Critical patent/EP3760450C0/fr
Publication of EP3760450B1 publication Critical patent/EP3760450B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—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
    • B42D25/355—Security threads

Definitions

  • the invention relates to a security element for a document of value, a security paper and the like according to the preamble of claim 1.
  • the solution according to the invention creates an additional, measurable color shift effect in areas of the recesses, which is not superficially visible to a user and, as a hidden security feature, contributes significantly to increasing security against forgery.
  • the at least one recess is designed as a letter, number, character, symbol or part of an image or pattern.
  • a variant has proven to be particularly advantageous in which the at least one recess in the reflector layer is free of material from the at least one spacer layer or is at least partially filled, in particular completely filled, by at least a portion of the at least one spacer layer.
  • the at least one spacer layer extends uninterruptedly, at least over the entire length and width of the thin-film element.
  • the at least one absorber layer of the thin-film element completely covers the at least one recess in the reflector layer in a top view of the security element.
  • the first recesses and the second recesses overlap each other at least in sections, preferably completely, in a plan view of the security element.
  • the at least one first absorber layer is uninterrupted and extends over the entire length and width of the thin-film element.
  • the at least one first absorber layer has a transmittance that is between 0.1 and 0.99, in particular between 0.5 and 0.99, particularly preferably between 0.7 and 0.99.
  • the at least one reflector layer can be at least one metallic material, in particular selected from the group of aluminum, silver, copper, gold, platinum, niobium, tin, or nickel, titanium, vanadium, chromium, cobalt and palladium or alloys thereof Materials, in particular cobalt-nickel alloys, or at least one high-index dielectric material with a refractive index of greater than 1.65, in particular selected from the group of zinc sulfide (ZnS), zinc oxide (ZnO), titanium dioxide (TiO 2 ), carbon (C ), indium oxide (In 2 O 3 ), indium tin oxide (ITO), tantalum pentoxide (Ta 2 O 5 ), cerium oxide (CeO 2 ), yttrium oxide (Y 2 O 3 ), europium oxide (Eu 2 O 3 ), iron oxides such as (II)iron(III) oxide (Fe 3 O 4 ) and iron oxide (Fe 2 O 3 ), ha
  • the at least one absorber layer can be at least one metallic material, in particular selected from the group of nickel, titanium, vanadium, cobalt, palladium, iron, tungsten, molybdenum, niobium, chromium, aluminum, also silver, copper or alloys of these materials include and/or be made from at least one of these materials.
  • the at least one spacer layer can contain at least one high-refractive index dielectric material with a refractive index greater than or equal to 1.65, in particular selected from the group of zinc sulfide (ZnS), zinc oxide (ZnO), titanium dioxide (TiO 2 ), carbon (C ), indium oxide (In 2 O 3 ), indium tin oxide (ITO), tantalum pentoxide (Ta 2 O 5 ), cerium oxide (CeO 2 ), yttrium oxide (Y 2 O 3 ), europium oxide (Eu 2 O 3 ), iron oxides such as (II)iron(III) oxide (Fe 3 O 4 ) and iron oxide (Fe 2 O 3 ), hafnium nitride (HfN), hafnium carbide (HfC), hafnium oxide (HfO 2 ), lanthanum oxide (La 2 O 3 ), Magnesium oxide (MgO), neodymium oxide (N
  • Na 3 AlF 6 or Na 5 Al 3 F 14 neodymium fluoride (NdF 3 ), lanthanum fluoride (LaF 3 ), samarium fluoride (SmF 3 ), barium fluoride (BaF 2 ), calcium fluoride (CaF 2 ), lithium fluoride (LiF), depressing organic monomers and/ or break-down organic polymers or be made from at least one of these materials.
  • the reflector layer facing away from the spacer layer there is at least one additional one Layer made of the same material as the spacer layer is arranged, the reflector layer being embedded, in particular completely embedded, between the additional layer and the spacer layer.
  • the security element has at least one carrier layer made of plastic, in particular made of a translucent plastic, which carries the at least one thin-film element, the carrier layer preferably having at least one of the materials from the group polyimide (PI), polypropylene (PP) , monoaxially oriented polypropylene (MOPP), biaxially oriented polypropylene (BOPP), polyethylene (PE), polyphenylene sulfide (PPS), polyetheretherketone, (PEEK) polyetherketone (PEK), polyethyleneimide (PEI), polysulfone (PSU), polyaryletherketone (PAEK), Polyethylene naphthalate (PEN), liquid crystalline polymers (LCP), polyester, polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyamide (PA), polycarbonate (PC), cycloolefin copolymers (COC), polyoxymethylene (POM), acrylonitrile butadiene sty
  • PI polyimide
  • All information on value ranges in this description should be understood to include any and all sub-ranges, e.g. the information 1 to 10 should be understood to include all sub-ranges, starting from the lower limit 1 and the upper limit 10 , i.e. all subranges start with a lower limit of 1 or greater and end with an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.
  • Fig.1 shows a security element 1.
  • This security element serves as anti-counterfeit protection for a document of value, a security paper, value cards, such as credit cards, and the like.
  • the security element can be applied to the object to be secured or embedded in it.
  • the security element is particularly suitable for attachment in a “window area” of the object, for example in a window area of a banknote.
  • a window is understood to be a transparent area of the object.
  • the security element is not limited to use in a window area, but can generally be attached to any surface area of a valuable document, security paper, a prepaid card and the like.
  • the security element 1 can have a carrier layer 2 made of plastic.
  • the carrier layer 2 can be made of a translucent plastic.
  • plastics such as transparent carrier films, preferably flexible plastic films, for example made of polyimide (PI), polypropylene (PP), monoaxially oriented polypropylene (MOPP), biaxially oriented polypropylene (BOPP), polyethylene (PE), polyphenylene sulfide (PPS), polyetheretherketone (PEEK) polyether ketone (PEK), polyethyleneimide (PEI), polysulfone (PSU), polyaryl ether ketone (PAEK), polyethylene naphthalate (PEN), liquid crystalline polymers (LCP), polyester, polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyamide (PA) , polycarbonate (PC), cycloolefin copolymers (COC), polyoxymethylene (POM), acrylonitrile butadiene styrene (ABS), polyvinyl chloride (P
  • a color-shifting thin-film element 3 can be applied to the carrier layer 2.
  • the thin-film element 3 has an absorber layer 4 and a reflector layer 5.
  • a spacer layer 6 is arranged between the absorber layer 4 and the reflector layer 5.
  • the reflector layer 5 has one or more recesses 7, which can be designed, for example, as letters, numbers, characters, symbols or as part of an image or pattern.
  • the spacer layer 6 covers the entire surface of the absorber layer 4 and the reflector layer 5 on mutually facing sides of these layers.
  • the recesses 7 in the reflector layer 5 are also covered by the spacer layer 6.
  • the recess 7 in the reflector layer can also be partially filled or completely filled by partial areas of the spacer layer 6.
  • the spacer layer 6 can extend over the entire length and width of the thin-film element 3 without interruptions in the layer.
  • a color-shifting element 3a consisting of the absorber layer 4 and the spacer layer 6 is formed.
  • the color-shifting element 3a formed from the spacer layer 6 and the absorber layer 4 generates a second color-shifting effect in the areas of the recesses 7 in addition to a first color-shifting effect caused by the absorber layer 4, the spacer layer 6 and the full-surface, uninterrupted areas of the reflector layer 5.
  • the first color shift effect can be seen with the naked eye, while the second color shift effect is significantly weaker due to the absence of the reflector layer 5 and can at least be detected mechanically.
  • FIG. 1 The absorber layer 4 of the thin-film element 3 can be seen, the recesses 7 in or in the reflector layer 5 in a top view of the security element 1 completely cover.
  • the absorber layer 4 can completely cover the recesses 7 when viewed from the direction of the carrier layer 2, with the recesses 7 lying behind the absorber layer 4 when viewed from the direction of the carrier layer 2.
  • the absorber layer 4 is preferably made of a metal, for example nickel, titanium, vanadium, cobalt, palladium, iron, tungsten, molybdenum, niobium, chromium, aluminum, copper or silver or alloys of these materials.
  • the absorber layer 4 can, for example, have a transmission coefficient that is between 0.1 and 0.99, in particular between 0.5 and 0.99, particularly preferably between 0.7 and 0.99.
  • the spacer layer is usually made of a dielectric material.
  • the spacer layer can be made from a material with a low refractive index, for example a refractive index less than or equal to 1.65.
  • Suitable materials with a low refractive index are, for example, silicon oxide ( SIOx ), silicon dioxide ( SiO2 ), aluminum oxide ( Al2O3 ) , metal fluorides, for example magnesium fluoride ( MgF2 ), aluminum fluoride ( AlF3 ), cerium fluoride ( CeF3 ), sodium -Aluminum fluorides (e.g.
  • Na 3 AlF 6 or Na 5 Al 3 F 14 Na 3 AlF 6 or Na 5 Al 3 F 14 ), neodymium fluoride (NdF 3 ), lanthanum fluoride (LaF 3 ), samarium fluoride (SmF 3 ), barium fluoride (BaF 2 ), calcium fluoride (CaF 2 ), lithium fluoride ( LiF), or combinations of these materials.
  • NdF 3 neodymium fluoride
  • LaF 3 lanthanum fluoride
  • SmF 3 samarium fluoride
  • BaF 2 barium fluoride
  • CaF 2 calcium fluoride
  • LiF lithium fluoride
  • the spacer layer can also be made from a material with a high refractive index, for example a refractive index greater than 1.65.
  • Suitable materials with a high refractive index are, for example, zinc sulfide (ZnS), zinc oxide (ZnO), titanium dioxide (TiO 2 ), carbon (C), indium oxide (In 2 O 3 ), indium tin oxide (ITO), tantalum pentoxide (Ta 2 O 5 ), cerium oxide (CeO 2 ), yttrium oxide (Y 2 O 3 ), europium oxide (Eu 2 O 3 ), iron oxides such as (II)iron (III) oxide (Fe 3 O 4 ) and iron oxide (Fe 2 O 3 ), hafnium nitride (HfN), hafnium carbide (HfC), hafnium oxide (HfO 2 ), lanthanum oxide (La 2 O 3 ), magnesium oxide (MgO), neodymium
  • the layer thickness of the spacer layer 6 is preferably 50 nm - 800 nm, in particular between 100 nm - 700 nm, particularly preferably 150 - 600 nm.
  • the spacer layer 6 can have an optical thickness in Quarter Wave Optical Thinkness (QWOT) of approximately 2 QWOT at a wavelength of 400 nm to approximately 9 QWOT at a wavelength of approximately 700 nm, preferably the spacer layer 6 at 400 - 700 nm has an optical thickness of 2 - 6 QWOT.
  • QWOT Quarter Wave Optical Thinkness
  • the values given are not just areas of fluctuation, but the thickness of the layer 6 varies depending on the color shift effect to be achieved in each case.
  • the reflector layer 5 can be made, for example, from metals such as aluminum, silver, copper, gold, platinum, niobium, tin, or from nickel, titanium, chromium, vanadium, cobalt and palladium or cobalt-nickel alloys.
  • the reflection layer can also consist of a high-refractive index dielectric layer with a refractive index of greater than 1.65, in particular selected from the group consisting of zinc sulfide (ZnS), zinc oxide (ZnO), titanium dioxide (TiO 2 ), carbon (C).
  • an optical density (OD) of the reflector layer 5 is preferably between 1 and 3, preferably between 1.5 and 2.5%.
  • the reflector layer 5 can be quasi-transparent.
  • the spacer layer 6 is made of a dielectric material with a low refractive index and the reflection layer is made of a dielectric material with a high refractive index.
  • the absorber layer of the thin-film element 11 of the security element 10 has at least a first absorber layer 4, which completely covers the recesses 7 of the reflector layer 5 in a plan view of the security element 10, and a second absorber layer 8, which is applied to the first absorber layer 4.
  • the second absorber layer 8 can be partially applied to the first absorber layer 4 and has first recesses 12, with the reflector layer 5 having second recesses 7.
  • the second absorber layer 8 lies between the reflector layer 5 and the first absorber layer 4.
  • the spacer layer 6 is arranged between the reflector layer 5 and the first absorber layer 4 and between the reflector layer 5 and the second absorber layer 8.
  • the second absorber layer 8 preferably has an optical density (OD) of 0.1 - 0.9, in particular 0.3 - 0.4, and can be made from the same materials as the first absorber layer 4.
  • the first recesses 12 and the second recesses 7 can overlap one another in sections in a top view of the security element 1.
  • the first recesses 12 and the second recesses 7 preferably overlap completely.
  • the first recesses 12 and the second recesses 7 can be designed to be congruent with one another.
  • At least one further layer 9 made of the same material as the spacer layer 6 can be arranged on a side of the reflector layer 5 facing away from the spacer layer 6. After the layer 9 has been applied, it borders directly on the spacer layer 6 in areas of the recesses 12 or merges into it.
  • the reflector layer 5 can be embedded, in particular completely embedded, between the further layer 9 and the spacer layer 6.
  • the layer 9 preferably has a layer thickness between 100 nm - 400 nm, in particular between 150 nm - 300 nm, particularly preferably 160 - 200.
  • washing paint can be applied in the areas in which the second absorber layer 8 should have the recesses 12.
  • the second absorber layer 8 can then be applied and the washing color can be removed, leaving the recesses 12 as demetallized areas.
  • a coating with the spacer layer 6 can then take place.
  • Washing paint can in turn be applied to the spacer layer 6 in areas in which the reflector layer 5 should have the recesses 7.
  • the washing color can be removed, so that the recesses 7 remain as demetallized areas.
  • the layer 9 can then be applied to the reflector layer, whereby the recesses 7 in the reflector layer 5 are completely or partially filled with the material of the layer 9.
  • the recesses 7 in the reflector layer 5 can also be left unfilled so that no material is present in the recesses.
  • first absorber layer 4 and the second absorber layer 8 can be designed as a single absorber layer with varying layer thickness, onto which the spacer layer 6 and optionally washing ink as well as the reflector layer 5 are applied in the course of production.
  • the spacer layer 6 and the layer 9 can also form a single continuous layer.
  • the individual layers can be applied to one another in a manner known per se, for example using physical vapor deposition (PVD) processes, sputtering or printing processes.
  • PVD physical vapor deposition
  • the absorber layer 8 and the reflector layer 5 can only be partially applied or produced using etching processes.
  • the security element 1 can be produced analogously to the method described above.

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Claims (13)

  1. Élément de sécurité (1, 10) pour un document de valeur, un papier de sécurité et similaire, dans lequel l'élément de sécurité (1, 10) comprend au moins un élément à couche mince de couleur changeante (3, 11) avec au moins une couche absorbante (4, 8), au moins une couche réflectrice (5) et au moins une couche d'espacement (6) disposée entre la couche absorbante (4, 8) et la couche réflectrice (5), dans lequel l'au moins une couche réflectrice (5) comprend au moins un évidement (7), dans lequel l'au moins une couche d'espacement (6) recouvre l'au moins une couche absorbante (4, 8) et la couche réflectrice (5) sur toute leur surface sur leurs faces orientées l'une vers l'autre, dans lequel la couche d'espacement (6) recouvre l'au moins un évidement (7) dans l'au moins une couche réflectrice (5) sur toute sa surface, dans lequel, dans une partie de l'au moins un évidement (7), est formé un élément à couleur changeante (3a) constitué de l'au moins une couche absorbante (4) et de l'au moins une couche d'espacement (6), caractérisé en ce que l'au moins une couche absorbante (4, 8) de l'élément à couche mince (11) comprend au moins une première couche absorbante (5) recouvrant entièrement l'au moins un évidement (7) de la couche réflectrice (5) en vue de dessus de l'élément de sécurité (1, 10) et au moins une deuxième couche absorbante (8), dans lequel l'au moins une deuxième couche absorbante (8) comprend des premiers évidements (12) et l'au moins une couche réflectrice comprend des deuxièmes évidements (7), dans lequel l'au moins une deuxième couche absorbante (8) est disposée entre l'au moins une couche réflectrice et l'au moins une première couche absorbante (4) et l'au moins une couche d'espacement (6) est disposée entre l'au moins une couche réflectrice (5) et l'au moins une première couche absorbante (4) et entre l'au moins une couche réflectrice (5) et l'au moins une deuxième couche absorbante (8).
  2. Élément de sécurité selon la revendication 1, caractérisé en ce que l'au moins un évidement (7) est conçu comme une lettre, un chiffre, un caractère, un symbole ou une partie d'une image ou d'un motif.
  3. Élément de sécurité selon la revendication 1 ou 2, caractérisé en ce que l'au moins un évidement (7) dans la couche réflectrice (5) est exempt de matériau de l'au moins une couche d'espacement (6) ou est au moins partiellement rempli, plus particulièrement entièrement rempli, par au moins une partie de l'au moins une couche d'espacement (6).
  4. Élément de sécurité selon l'une des revendications 1 à 3, caractérisé en ce que l'au moins une couche d'espacement (6) s'étend de manière ininterrompue, au moins sur toute la longueur et la largeur de l'élément à couche mince (3).
  5. Élément de sécurité selon l'une des revendications 1 à 4, caractérisé en ce que l'au moins une couche absorbante (4) de l'élément à couche mince (3) recouvre entièrement l'au moins un évidement (7) de la couche réflectrice en vue de dessus de l'élément de sécurité (1).
  6. Élément de sécurité selon la revendication 5, caractérisé en ce que les premiers évidements (12) et les deuxièmes évidements (7) se superposent au moins à certains endroits, de préférence entièrement, en vue de dessus de l'élément de sécurité (1).
  7. Élément de sécurité selon l'une des revendications 1 à 6, caractérisé en ce que la couche absorbante ou l'au moins une première couche absorbante (4) est ininterrompue et s'étend sur toute la longueur et largeur de l'élément à couche mince (3, 11).
  8. Élément de sécurité selon l'une des revendications 1 à 7, caractérisé en ce que l'au moins une première couche absorbante (4) présente un coefficient de transmission qui se trouve entre 0,1 et 0,99, plus particulièrement entre 0,5 et 0,99, plus particulièrement de préférence entre 0,7 et 0,99.
  9. Élément de sécurité selon l'une des revendications 1 à 8, caractérisé en ce que l'au moins une couche réflectrice comprend au moins un matériau métallique, plus particulièrement sélectionné dans le groupe suivant : aluminium, argent, cuivre, or, platine, niobium, étain ou est constituée de nickel, titane, vanadium, chrome, cobalt et palladium ou d'alliages de ces matériaux, plus particulièrement des alliages cobalt-nickel ou d'au moins un matériau diélectrique hautement réfringent avec un indice de réfraction supérieur à 1,65, plus particulièrement sélectionné dans le groupe suivant : sulfure de zinc (ZnS), oxyde de zinc (ZnO), dioxyde de titane (TiO2), carbone (C), oxyde d'indium (In2O3), Oxyde d'indium-étain (ITO), pentoxyde de tantale (Ta2O5), oxyde de cérium (CeO2), oxyde d'yttrium (Y2O3), oxyde d'europium (Eu2O3), des oxydes de fer, par exemple (II) oxyde de fer (III) (Fe3O4) et oxyde de fer (Fe2O3), nitrure de hafnium (HfN), carbure de hafnium (HfC), oxyde de hafnium (HfO2), oxyde de lanthane (La2O3), oxyde de magnésium (MgO), oxyde de néodyme (Nd2O3), oxyde de praséodyme (Pr6O11), oxyde de samarium (Sm2O3), trioxyde d'antimoine (Sb2O3), carbure de silicium (SiC), nitrure de silicium (Si3N4), oxyde de silicium (SiO), trioxyde de sélénium (Se2O3), oxyde d'étain (SnO2), trioxyde de tungstène (WO3), des monomères organiques hautement réfringents et/ou des polymères organiques hautement réfringents ou est constituée d'au moins un de ces matériaux.
  10. Élément de sécurité selon l'une des revendications 1 à 9, caractérisé en ce que l'au moins une couche absorbante (4, 8) comprend au moins un matériau métallique, plus particulièrement sélectionné dans le groupe suivant : nickel, titane, vanadium, chrome, cobalt, palladium, fer, tungstène, molybdène, niobium, aluminium, argent, cuivre et/ou des alliages de ces matériaux ou est constituée d'au moins un de ces matériaux.
  11. Élément de sécurité selon l'une des revendications 1 à 10, caractérisé en ce que l'au moins une couche d'écartement comprend au moins un matériau diélectrique faiblement réfringent avec un indice de réfraction inférieur ou égal à 1,65, plus particulièrement sélectionné dans le groupe suivant : oxyde de silicium (SiOx), dioxyde de silicium (SiO2), oxyde d'aluminium (Al2O3), fluorures métalliques, par exemple le fluorure de magnésium (MgF2), le fluorure d'aluminium (AlF3), le fluorure de cérium (CeF3), des fluorures sodium-aluminium (par exemple Na3AlF6 ou Na5Al3F14), le fluorure de néodyme (NdF3), le fluorure de lanthane (LaF3), le fluorure de samarium (SmF3), le fluorure de baryum (BaF2), le fluorure de calcium (CaF2), le fluorure de lithium (LiF), des monomères organiques faiblement réfringents et/ou des polymères organiques faiblement réfringents ou au moins un matériau diélectrique hautement réfringent avec un indice de réfraction supérieur à 1,65, plus particulièrement sélectionné dans le groupe suivant : sulfure de zinc (ZnS), oxyde de zinc (ZnO), dioxyde de titane (TiO2), carbone (C), oxyde d'indium (In2O3), Oxyde d'indium-étain (ITO), pentoxyde de tantale (Ta2O5), oxyde de cérium (CeO2), oxyde d'yttrium (Y2O3), oxyde d'europium (Eu2O3), des oxydes de fer, par exemple (II) oxyde de fer (III) (Fe3O4) et oxyde de fer (Fe2O3), nitrure de hafnium (HfN), carbure de hafnium (HfC), oxyde de hafnium (HfO2), oxyde de lanthane (La2O3), oxyde de magnésium (MgO), oxyde de néodyme (Nd2O3), oxyde de praséodyme (Pr6O11), oxyde de samarium (Sm2O3), trioxyde d'antimoine (Sb2O3), carbure de silicium (SiC), nitrure de silicium (Si3N4), monoxyde de silicium (SiO), trioxyde de sélénium (Se2O3), oxyde d'étain (SnO2), trioxyde de tungstène (WO3), des monomères organiques hautement réfringents et/ou des polymères organiques hautement réfringents ou est constituée d'au moins un de ces matériaux.
  12. Élément de sécurité selon l'une des revendications 1 à 11, caractérisé en ce que, sur une face, opposée à la couche d'écartement (6), de la couche réflectrice (5), est disposée au moins une couche supplémentaire (9) constituée du même matériau que la couche d'écartement (6), dans lequel la couche réflectrice (5) est incorporée, plus particulièrement entièrement incorporée entre la couche supplémentaire (9) et la couche d'écartement (6).
  13. Élément de sécurité selon l'une des revendications 1 à 12, caractérisé en ce qu'il comprend au moins une couche de support en matière plastique supportant l'au moins un élément à couche mince, plus particulièrement constituée d'une matière plastique transparente, dans lequel la couche de support comprend de préférence au moins un des matériaux du groupe suivant : polyimide (PI), polypropylène (PP), polypropylène orienté monoaxialement (MOPP), polypropylène orienté biaxialement (BOPP), polyéthylène (PE), sulfure de polyphényle (PPS), polyétheréthercétone (PEEK), polyéthercétone (PEK), polyéthylimide (PEI), polysulfone (PSU), polyaryléthercétone (PAEK), polyéthylène-naphthalate (PEN), polymères à cristaux liquides (LCP), polyester, polybutylène-téréphthalate (PET), polyamide (PA), polycarbonate (PC), copolymères cyclo-oléfines (COC), polyoxyméthylène (POM), acrylnitrile-butadiène-styrène (ABS), chlorure de polyvinyle (PVC), éthylène-tétrafluoroéthylène (ETFE), polytétrafluoroéthylène (PTFE), fluorure de polyvinyle (PVF), fluorure de polyvinylidène (PVDF) et éthylène-tétrafluoroéthylène-hexafluoropropylène-fluorterpolymère (EFEP) et/ou des mélanges et/ou des copolymères de ces matériaux ou est constituée d'au moins un de ces matériaux.
EP19184053.7A 2019-07-03 2019-07-03 Élément de sécurité pour un document de valeur Active EP3760450B1 (fr)

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Application Number Priority Date Filing Date Title
EP19184053.7A EP3760450B1 (fr) 2019-07-03 2019-07-03 Élément de sécurité pour un document de valeur
PCT/EP2020/068649 WO2021001475A1 (fr) 2019-07-03 2020-07-02 Élément de sécurité pour un document de valeur

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EP19184053.7A EP3760450B1 (fr) 2019-07-03 2019-07-03 Élément de sécurité pour un document de valeur

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EP3760450A1 EP3760450A1 (fr) 2021-01-06
EP3760450C0 EP3760450C0 (fr) 2024-03-06
EP3760450B1 true EP3760450B1 (fr) 2024-03-06

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DE10319232A1 (de) * 2003-04-28 2004-11-18 Giesecke & Devrient Gmbh Flächiges Sicherheitselement und Herstellungsverfahren für dasselbe
DE102004049118A1 (de) * 2004-10-07 2006-04-13 Giesecke & Devrient Gmbh Sicherheitselement und Verfahren zu seiner Herstellung

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EP3760450C0 (fr) 2024-03-06
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