EP3374197B1 - Élément de sécurité, procédé de fabrication de l'élément de sécurité, et support de données équipé de cet élément de sécurité - Google Patents

Élément de sécurité, procédé de fabrication de l'élément de sécurité, et support de données équipé de cet élément de sécurité Download PDF

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Publication number
EP3374197B1
EP3374197B1 EP16797741.2A EP16797741A EP3374197B1 EP 3374197 B1 EP3374197 B1 EP 3374197B1 EP 16797741 A EP16797741 A EP 16797741A EP 3374197 B1 EP3374197 B1 EP 3374197B1
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EP
European Patent Office
Prior art keywords
layer
semitransparent
security element
metallic layer
semitransparent metallic
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.)
Active
Application number
EP16797741.2A
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German (de)
English (en)
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EP3374197A1 (fr
Inventor
Björn Teufel
Giselher Dorff
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.)
Giesecke and Devrient Currency Technology GmbH
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Giesecke and Devrient Currency Technology GmbH
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Publication of EP3374197A1 publication Critical patent/EP3374197A1/fr
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Publication of EP3374197B1 publication Critical patent/EP3374197B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—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
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/23—Identity cards
    • 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
    • B42D25/351—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/373—Metallic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B42D25/445—Marking by removal of material using chemical means, e.g. etching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers

Definitions

  • the invention relates to a security element, a method for producing the same and a data carrier equipped with the security element, e.g. a document of value such as a bank note.
  • Data carriers such as value or ID documents, or other valuables, such as branded items, are often provided with security elements for protection, which allow the authenticity of the data carrier to be checked and which also serve as protection against unauthorized reproduction.
  • (see-through) security elements with multilayer thin-layer elements which appear in a first color when viewed in reflected light, ie in reflection, and in a second color when viewed in transmitted light, ie in transmission.
  • the WO 2011/082761 A1 describes a thin film element with a multilayer structure which appears gold when viewed in reflected light and blue when viewed in transmitted light.
  • the multilayer structure is based on two semi-transparent mirror layers and a dielectric spacer layer arranged between the two mirror layers.
  • the EP 1504 923 A2 describes a document of value with a thin-layer, optically variable security device.
  • the security device is obtained by changing an exposed reflective layer so that the security device has an image, a pattern or text.
  • the WO 03/070482 A1 describes a security document with a substrate and a multi-layer security element which is connected to the substrate in such a way that it is accessible from at least one of the two substrate surfaces is visually recognizable from , wherein the security element comprises an interference element that produces a color shift effect and a layer with diffraction structures that at least partially overlaps with the interference element, or the security element comprises a multilayer interference element that produces a color shift effect and has gaps in at least one layer.
  • the DE 10 2008 031325 A1 describes a security element for protecting valuables with an optically variable layer, which conveys different color impressions from different viewing angles, and a color layer arranged in an overlapping area over the optically variable layer, the color impression of the optically variable layer in an area not covered by the color layer Viewing is adapted from a predetermined viewing angle to the color impression of the color layer in the overlapping area and a metal layer is arranged between the color layer and the optically variable layer.
  • the WO 2011/064162 A1 describes a security or decorative element comprising a substrate that may contain indicia or other visible features in or on its surface, an optically variable image on a discrete portion of the substrate, and a coating on at least a portion of the optically variable image, the coating includes platelet-shaped transition metal particles with a longest edge length dimension of 14nm to 1000nm and a thickness of 2nm to 100nm.
  • the invention is based on the object of specifying a security element of the type mentioned at the outset with a high degree of protection against counterfeiting and an attractive visual appearance, as well as a production method for this.
  • the document of value referred to in the present description can be a banknote, in particular a paper banknote, a polymer banknote or a film composite banknote, a share, a bond, a certificate, a voucher, a check, a high-value admission ticket, but also an identification card, such as a credit card, a bank card, a cash payment card, an authorization card, an ID card or a passport personalization page.
  • a banknote in particular a paper banknote, a polymer banknote or a film composite banknote, a share, a bond, a certificate, a voucher, a check, a high-value admission ticket, but also an identification card, such as a credit card, a bank card, a cash payment card, an authorization card, an ID card or a passport personalization page.
  • viewing in incident light is illumination of the security element from one side and viewing of the security element from the same side, preferably at a viewing angle of the security element of approximately 90°. Observation in reflected light is therefore present, for example, when the front side of the security element is illuminated and also viewed.
  • a viewing angle-dependent color impression in reflected light means that viewing the security element in reflected light at a viewing angle of approx. 90° leads to a specific optically perceptible color and at a viewing angle of approx. 20° to 40° leads to another optically perceptible color.
  • viewing in transmitted light is illumination of a security element from one side and viewing of the security element from another side, in particular the opposite side.
  • An observation in transmitted light is therefore present, for example, when the rear side of the security element is illuminated and the front side of the security element is viewed. The light thus shines through the security element.
  • the security element according to the invention can be present, for example, as a patch or label, as a (continuous) strip or as a (continuous) thread.
  • the data carrier substrate of the data carrier to be equipped with the security element according to the invention is in particular a paper substrate or a Paper-like substrate, a polymeric substrate, a paper/foil/paper composite substrate, or a foil/paper/foil composite substrate.
  • a document of value or security paper provided with a window area can be produced in the case of a paper substrate, a paper/foil/paper composite substrate or a foil/paper/foil composite substrate, for example by means of a continuous recess within the paper layer(s).
  • the paper layer can be made transparent in a certain area by means of a suitable liquid, for example by means of an aqueous sulfuric acid solution.
  • a window area can be produced, for example, by means of congruent gaps in the opaque printed layers applied to the front and back of the polymer substrate.
  • the semi-transparent functional layer has different shades of color when viewed in incident light on the one hand and when viewed in transmitted light on the other.
  • the two different hues are, for example, complementary colors.
  • Such a semitransparent functional layer is based, for example, on a multilayer structure with two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers.
  • Such a multilayer structure which appears gold when viewed in reflected light and shows a blue hue when viewed in transmitted light, is, for example, from WO 2011/082761 A1 famous.
  • the security element according to the invention has a first semi-transparent functional layer with a multi-layer structure with a first semi-transparent metallic layer, a second semi-transparent metallic layer and a dielectric layer arranged between the first and the second semi-transparent metallic layer, the semi-transparent functional layer being such that the second Semitransparent metallic layer is at least partially present in a greater layer thickness than the first semitransparent metallic layer. It is preferable that the layer thickness of the second semitransparent metallic layer is 1.5 to 2 times the layer thickness of the first semitransparent metallic layer.
  • the security element according to the invention is such that, in addition to the first semitransparent functional layer, the transparent carrier substrate also has a second semitransparent functional layer that can be obtained by printing using an effect pigment composition, the second semitransparent functional layer when viewed in incident light, both from the back , as well as from the front, appears in the first visually recognizable color and when viewed in transmitted light, from both the back and from the front, appears in the third visually recognizable color.
  • the pigments preferably have a longest dimension of edge length from end-to-end in a range of 15 nm to 1000 nm and are based on a transition metal selected from the group consisting of Cu, Ag, Au, Zn, Cd, Ti, Cr, Mn, Fe, Co, Ni, Ru, Rh, Pd, Os, Ir and Pt is selected.
  • the transition metal is preferably Ag.
  • the aspect ratio i.e. the ratio of the longest end-to-end dimension to the thickness
  • the ratio of binder to metal pigment is preferably below 10: 1, especially below 5:1.
  • the color when viewing the print layer in transmission and the color when viewed in reflection can be adjusted (e.g. blue in transmission and silver, gold, bronze, copper or violet in reflection; also violet, magenta, pink, green or brown in transmission and various colors in reflection depending on the choice of pigment/binder ratio).
  • Colors with a gold/blue color change between reflection and transmission are, for example, in Examples 1, 2 and 3 in Table 1 of WO 2011/064162 A2 called.
  • example 4 shows a gold/violet color change color
  • example 5 a green-gold/magenta color change color
  • example 7 a violet/green color change color
  • example 8 a silver/opaque color change color.
  • the first semi-transparent functional layer mentioned in the above variants can alternatively be an Ag/SiO 2 /Ag structure instead of an Al/SiO 2 /Al structure.
  • the order of the layers can be changed.
  • the semi-transparent metallic layer with a high layer thickness can first be arranged on the carrier substrate, followed by the dielectric layer and finally the further metallic layer with a thin layer thickness.
  • the following description relates in particular to the variant according to which the two semi-transparent metallic layers are based on different metals.
  • the layer structure shows on the one hand when viewing the front side in incident light (i.e. 90°) and on the other hand when viewing the rear side in incident light (i.e. 90°). different colors on.
  • the layer structure has another color when viewed in transmitted light.
  • the layer structure shows a color impression that is dependent on the viewing angle.
  • the layer sequence can also be a, b, e, d, c, f, i.e. the Al layer (or Ag layer) and the Cr layer are in interchanged form.
  • the aluminum metallization 4 with a comparatively high layer thickness represents the front of the layers 4, 5, and 6 comprising the semi-transparent functional layer.
  • the aluminum metallization 6 with a comparatively small layer thickness represents the back of the layers 4, 5, and 6 comprising the semi-transparent functional layer.
  • the block arrow 8 shows the front side of the security element being viewed. The observer perceives the security element in silver color when viewing the front side of the security element in reflected light.
  • the block arrow 9 shows the rear side of the security element. The observer perceives the security element in reflected light when looking at the back of the security element in a golden color.
  • the security element When viewed in transmitted light, the security element appears in the color blue, both from the front and from the back.
  • the security element shown comprising the layers 3 to 7 can additionally have an embossing lacquer layer, eg a UV lacquer, between the aluminum metallization 6 and the carrier substrate 7, which in particular contains a relief structure forming a diffractive structure and/or a relief structure forming a micromirror arrangement.
  • embossing lacquer layer eg a UV lacquer
  • the aluminum metallizations 13 and 14, which together form a metallization with a comparatively high layer thickness, represent the front side of the layers 11, 12, 13 and 14, the semi-transparent functional layer.
  • the aluminum metallization 11 represents the back of the layers 11, 12, 13 and 14 comprising the semi-transparent functional layer.
  • the block arrows 15 and 16 show the view of the front side of the security element.
  • the observer perceives the security element in silver color at the location of the block arrow 15 .
  • the observer perceives the security element in incident light at the location of the block arrow 16 in golden color when viewing the front side of the security element.
  • Block arrows 17 and 18 show the rear side of the security element being viewed. When looking at the back of the security element in reflected light, the observer perceives the security element in golden color both at the location of the block arrow 17 and at the location of the block arrow 18 .
  • the security element When viewed in transmitted light, both from the front and from the back, the security element appears in the color blue, namely at all points of the block arrows 15, 16, 17 and 18.
  • the security element can have an adhesive layer, in particular a hot-seal coating, for gluing the security element to a value-document substrate.
  • the layers 10 to 14 comprehensive security element additionally have between the aluminum metallization 11 and the carrier substrate 10 an embossing lacquer layer, eg a UV lacquer, which in particular contains a relief structure forming a diffractive structure and/or a relief structure forming a micromirror arrangement.
  • an embossing lacquer layer eg a UV lacquer, which in particular contains a relief structure forming a diffractive structure and/or a relief structure forming a micromirror arrangement.
  • the aluminum metallization 22 represents the front of the security element.
  • the aluminum metallization 20 represents the back of the security element.
  • the block arrows 24 and 25 show the view of the front side of the security element.
  • the observer perceives the security element in silver color at the location of the block arrow 24 .
  • the observer perceives the security element in golden color at the location of the block arrow 25 .
  • the block arrows 26 and 27 show the view of the back of the security element. When looking at the back of the security element in incident light, the observer perceives the security element in golden color both at the location of the block arrow 26 and at the location of the block arrow 27 .
  • the security element can have an adhesive layer, in particular a heat-seal coating, for gluing the security element to a value-document substrate.
  • security element shown additionally have an embossing lacquer layer, e.g. a UV lacquer, between the aluminum metallization 20 and/or the effect pigment layer 23 on the one hand, and the carrier substrate 19 on the other hand, which in particular contains a relief structure forming a diffractive structure and/or a relief structure forming a micromirror arrangement.
  • embossing lacquer layer e.g. a UV lacquer
  • aluminum was chosen to produce the semi-transparent metallic layer.
  • silver could be used instead of aluminum.

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

Claims (20)

  1. Elément de sécurité destiné à la sécurisation de documents de valeur, comprenant un substrat porteur transparent (7; 10; 19) et une première couche fonctionnelle semi-transparente qui, lors de l'observation en lumière incidente d'une part et lors de l'observation en lumière transmise d'autre part, présente différentes teintes, et comporte une structure multicouche ayant une première couche métallique semi-transparente (6; 11; 20), une deuxième couche métallique semi-transparente (4; 13, 14; 22) et une couche diélectrique (5; 12; 21) agencée entre la première et la deuxième couche métallique semi-transparente, cependant que la deuxième couche métallique semi-transparente (4; 13, 14; 22) se trouve au moins partiellement en une plus grande épaisseur de couche que celle de la première couche métallique semi-transparente (6; 11; 20), caractérisé en ce que la deuxième couche métallique semi-transparente (4; 13, 14; 22) définit la face avant de la couche fonctionnelle semi-transparente et la première couche métallique semi-transparente (6; 11; 20) définit la face arrière de la couche fonctionnelle semi-transparente, et la couche fonctionnelle semi-transparente
    - lors de l'observation de la face arrière en lumière incidente, présente une première couleur visuellement reconnaissable ;
    - lors de l'observation de la face avant en lumière incidente, à l'endroit où la deuxième couche métallique semi-transparente (4; 13, 14; 22) se trouve en une plus grande épaisseur de couche que la première couche métallique semi-transparente (6; 11; 20), présente une deuxième couleur visuellement reconnaissable et présente du reste la première couleur visuellement reconnaissable ;
    - lors de l'observation tant de la face avant en lumière transmise que de la face arrière en lumière transmise, présente une troisième couleur visuellement reconnaissable.
  2. Elément de sécurité selon la revendication 1, cependant que tant la première couche métallique semi-transparente (6; 11; 20) que la deuxième couche métallique semi-transparente (4; 13, 14; 22) sont basées sur le même métal.
  3. Elément de sécurité selon la revendication 1 ou 2, cependant que l'élément de sécurité comporte, dans l'ordre, la structure en couches suivante :
    - substrat porteur transparent (7; 10; 19)
    - première couche métallique semi-transparente (6; 11; 20) ;
    - couche diélectrique (5; 12; 21) ;
    - deuxième couche métallique semi-transparente (4; 13, 14; 22) qui se trouve au moins partiellement en une plus grande épaisseur de couche que celle de la première couche métallique semi-transparente (6; 11; 20) ;
    ou l'élément de sécurité comporte, dans l'ordre, la structure en couches suivante :
    - substrat porteur transparent (7; 10; 19) ;
    - deuxième couche métallique semi-transparente (4; 13, 14; 22) qui se trouve au moins partiellement en une plus grande épaisseur de couche que celle de la première couche métallique semi-transparente (6; 11; 20) ;
    - couche diélectrique (5; 12; 21) ;
    - première couche métallique semi-transparente (4; 13, 14; 22).
  4. Elément de sécurité selon une des revendications de 1 à 3, cependant que les deux couches métalliques semi-transparentes sont choisies parmi Al ou Ag, et la couche diélectrique (5; 12; 21) est une couche de SiO2 et les couleurs visuellement reconnaissables sont de préférence les couleurs suivantes :
    - la première couleur visuellement reconnaissable est dorée ;
    - la deuxième couleur visuellement reconnaissable est argentée ;
    - la troisième couleur visuellement reconnaissable est bleue.
  5. Elément de sécurité selon une des revendications de 1 à 4, cependant que la première couche fonctionnelle semi-transparente à structure multicouche est telle que la première couche métallique semi-transparente (6; 11; 20) et la couche diélectrique se trouvent respectivement en une épaisseur de couche uniforme, et la deuxième couche métallique semi-transparente (4; 13, 14; 22) présente dans des premières zones la même épaisseur de couche que la première couche métallique semi-transparente (6; 11; 20) et présente dans des deuxièmes zones une épaisseur de couche plus grande que celle de la première couche métallique semi-transparente (6; 11; 20).
  6. Elément de sécurité selon la revendication 5, cependant que l'élément de sécurité
    - lors de l'observation de la face arrière en lumière incidente, apparaît doré ;
    - lors de l'observation de la face avant en lumière incidente, apparaît doré dans des premières zones, et argenté dans des deuxièmes zones ;
    - lors de l'observation tant de la face avant en lumière transmise que de la face arrière en lumière transmise, apparaît bleuâtre.
  7. Elément de sécurité selon une des revendications de 1 à 6, cependant que le substrat porteur transparent (7; 10; 19) de l'élément de sécurité, en plus de la première couche fonctionnelle semi-transparente, comporte en outre une deuxième couche fonctionnelle semi-transparente (23) pouvant être obtenue par technique d'impression au moyen d'une composition de pigments à effets, cependant que la deuxième couche fonctionnelle semi-transparente (23) apparaît, lors de l'observation en lumière incidente, tant depuis la face arrière que depuis la face avant, dans la première couleur visuellement reconnaissable, et apparaît, lors de l'observation en lumière transmise, tant depuis la face arrière que depuis la face avant, dans la troisième couleur visuellement reconnaissable.
  8. Elément de sécurité selon la revendication 7, cependant que la deuxième couche fonctionnelle semi-transparente (23), lors de l'observation en lumière incidente, tant depuis la face arrière que depuis la face avant, apparaît dorée, et, lors de l'observation en lumière transmise, tant depuis la face arrière que depuis la face avant, apparaît bleuâtre.
  9. Elément de sécurité selon la revendication 1, cependant que le métal de la première couche métallique semi-transparente (6; 11; 20) et le métal de la deuxième couche métallique semi-transparente (4; 13, 14; 22) sont des métaux différents.
  10. Elément de sécurité selon la revendication 9, cependant que l'élément de sécurité comporte, dans l'ordre, la structure en couches suivante :
    - substrat porteur transparent (7; 10; 19)
    - première couche métallique semi-transparente (6; 11; 20) ;
    - couche diélectrique (5; 12; 21) ;
    - deuxième couche métallique semi-transparente (4; 13, 14; 22) qui se trouve au moins partiellement en une plus grande épaisseur de couche que celle de la première couche métallique semi-transparente (6; 11; 20) ;
    ou l'élément de sécurité comporte, dans l'ordre, la structure en couches suivante :
    - substrat porteur transparent (7; 10; 19) ;
    - deuxième couche métallique semi-transparente (4; 13, 14; 22) qui se trouve au moins partiellement en une plus grande épaisseur de couche que celle de la première couche métallique semi-transparente (6; 11; 20) ;
    - couche diélectrique (5; 12; 21) ;
    - première couche métallique semi-transparente (6; 11; 20).
  11. Elément de sécurité selon la revendication 9 ou 10, cependant que la deuxième couche métallique semi-transparente (4; 13, 14; 22) définit la face avant de la couche fonctionnelle semi-transparente, et la première couche métallique semi-transparente (6; 11; 20) définit la face arrière de la couche fonctionnelle semi-transparente, et la couche fonctionnelle semi-transparente
    - lors de l'observation de la face arrière en lumière incidente, présente une première couleur visuellement reconnaissable ;
    - lors de l'observation de la face avant en lumière incidente, présente une deuxième couleur visuellement reconnaissable ;
    - lors de l'observation tant de la face avant en lumière transmise que de la face arrière en lumière transmise, présente une troisième couleur visuellement reconnaissable ; et
    - lors de l'observation de la face arrière et/ou lors de l'observation de la face avant en lumière incidente, présente un effet de couleur dépendant de l'angle d'observation.
  12. Elément de sécurité selon la revendication 9, 10 ou 11, cependant que la une couche métallique semi-transparente est choisie parmi Al ou Ag, l'autre couche métallique semi-transparente est une couche de Cr, et la couche diélectrique est une couche de SiO2, cependant que l'épaisseur de la couche de Al ou de Ag a une hauteur d'au moins partiellement entre 1,25 et 3 fois, en particulier de préférence entre 1,5 et 2 fois l'épaisseur de couche de la couche de Cr.
  13. Elément de sécurité selon la revendication 12, cependant que la une couche métallique semi-transparente est une couche de Al, l'autre couche métallique semi-transparente est une couche de Cr, et la couche diélectrique est une couche de SiO2.
  14. Elément de sécurité selon une des revendications de 1 à 13, cependant que l'élément de sécurité est un ruban (sans fin), un fil (sans fin) ou bien un patch ou une étiquette.
  15. Elément de sécurité selon une des revendications de 1 à 14, cependant que, entre le substrat porteur transparent (7; 10; 19) et la couche fonctionnelle semi-transparente, il y a une couche de vernis de gaufrage qui comporte en particulier une structure en relief constituant une structure diffractive et/ou une structure en relief constituant un agencement de micro-miroirs.
  16. Support de données ayant un élément de sécurité selon une des revendications de 1 à 15.
  17. Support de données selon la revendication 16, cependant que le support de données est un document de valeur tel que par exemple un billet de banque, en particulier un billet de banque en papier, billet de banque en polymère ou billet de banque en film composite, ou carte d'identification.
  18. Support de données selon la revendication 16 ou 17, cependant que l'élément de sécurité est agencé au-dessus d'une zone fenêtre (2) constituée dans le substrat de support de données.
  19. Procédé de fabrication d'un élément de sécurité selon une des revendications de 1 à 15 pour la sécurisation de documents de valeur, comprenant un substrat porteur transparent (7; 10; 19) et une première couche fonctionnelle semi-transparente qui, lors de l'observation en lumière incidente d'une part et lors de l'observation en lumière transmise d'autre part, présente différentes teintes, et comporte une structure multicouche ayant une première couche métallique semi-transparente (6; 11; 20), une deuxième couche métallique semi-transparente (4; 13, 14; 22) et une couche diélectrique agencée entre la première et la deuxième couche métallique semi-transparente, cependant que la deuxième couche métallique semi-transparente (4; 13, 14; 22) se trouve au moins partiellement en une plus grande épaisseur de couche que celle de la première couche métallique semi-transparente (6; 11; 20), et cependant que la deuxième couche métallique semi-transparente définit la face avant de la couche fonctionnelle semi-transparente et la première couche métallique semi-transparente définit la face arrière de la couche fonctionnelle semi-transparente, et la couche fonctionnelle semi-transparente
    - lors de l'observation de la face arrière en lumière incidente, présente une première couleur visuellement reconnaissable ;
    - lors de l'observation de la face avant en lumière incidente, à l'endroit où la deuxième couche métallique semi-transparente se trouve en une plus grande épaisseur de couche que la première couche métallique semi-transparente, présente une deuxième couleur visuellement reconnaissable et présente du reste la première couleur visuellement reconnaissable ;
    - lors de l'observation tant de la face avant en lumière transmise que de la face arrière en lumière transmise, présente une troisième couleur visuellement reconnaissable, cependant que le procédé comporte les étapes suivantes:
    a) la mise à disposition d'un substrat porteur transparent;
    c) l'application à pleine surface d'une structure multicouche ayant une première couche métallique semi-transparente (6; 11; 20), une deuxième couche métallique semi-transparente (4; 13, 14; 22) et une couche diélectrique agencée entre la première et la deuxième couche métallique semi-transparente,
    d) l'impression partielle d'une encre lavable soluble sur la deuxième couche métallique semi-transparente (4; 13, 14; 22) appliquée en dernier lieu;
    e) l'application à pleine surface d'une autre métallisation semi-transparente;
    f) le lavage de l'encre lavable conjointement avec la zone de la métallisation semi-transparente appliquée à l'étape e), générée au-dessus de l'encre lavable.
  20. Procédé selon la revendication 19, cependant que le procédé comprend entre l'étape a) et l'étape c) en outre l'étape suivante b):
    b) le placement d'une couche de vernis de gaufrage sur le substrat porteur transparent, laquelle comporte en particulier une structure en relief constituant une structure diffractive et/ou une structure en relief constituant un agencement de micro-miroirs.
EP16797741.2A 2015-11-10 2016-11-08 Élément de sécurité, procédé de fabrication de l'élément de sécurité, et support de données équipé de cet élément de sécurité Active EP3374197B1 (fr)

Applications Claiming Priority (2)

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DE102015014505.3A DE102015014505A1 (de) 2015-11-10 2015-11-10 Sicherheitselement, Verfahren zum Herstellen desselben und mit dem Sicherheitselement ausgestatteter Datenträger
PCT/EP2016/001843 WO2017080641A1 (fr) 2015-11-10 2016-11-08 Élément de sécurité, procédé de fabrication de l'élément de sécurité, et support de données équipé de cet élément de sécurité

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EP3374197A1 EP3374197A1 (fr) 2018-09-19
EP3374197B1 true EP3374197B1 (fr) 2022-04-20

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CN (1) CN108349290B (fr)
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WO (1) WO2017080641A1 (fr)

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MX2021004736A (es) 2018-10-25 2021-06-04 Basf Se Composiciones, que comprenden nanoplaquetas de plata.
WO2020152021A1 (fr) 2019-01-21 2020-07-30 Basf Se Élément de sécurité
WO2020156858A1 (fr) 2019-01-29 2020-08-06 Basf Se Élément de sécurité
EP3965983A1 (fr) 2019-05-06 2022-03-16 Basf Se Compositions comprenant des nanoplaquettes d'argent
WO2021009161A1 (fr) * 2019-07-15 2021-01-21 Jt International Sa Filigrane argenté très brillant
DE102019005551A1 (de) * 2019-08-07 2021-02-11 Giesecke+Devrient Currency Technology Gmbh Herstellverfahren für ein Sicherheitspapier und damit erhältliches Sicherheitspapier
DE102019006977A1 (de) * 2019-10-08 2021-04-08 Giesecke+Devrient Currency Technology Gmbh Sicherheitselement- Transfermaterial, Verfahren zum Herstellen desselben und Verwendung
CN110767075B (zh) * 2019-12-05 2022-04-08 南方科技大学 一种基于金属微纳米网络的柔性防伪层、其制备方法和用途
CN115279518A (zh) 2020-04-23 2022-11-01 巴斯夫欧洲公司 包含片状过渡金属颗粒的组合物
CN117203007A (zh) 2021-02-03 2023-12-08 巴斯夫欧洲公司 包含银纳米片的组合物
CN115230277A (zh) * 2021-04-25 2022-10-25 中钞特种防伪科技有限公司 薄膜元件、透明防伪元件、及数据载体
CA3218468A1 (fr) 2021-05-12 2022-11-17 Basf Se Compositions comprenant des particules de metal de transition en forme de plaquettes
WO2023072740A1 (fr) 2021-10-26 2023-05-04 Basf Se Procédé pour la production d'éléments d'interférence

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DE10207622A1 (de) * 2002-02-22 2003-09-04 Giesecke & Devrient Gmbh Sicherheitsdokument und Sicherheitselement für ein Sicherheitsdokument
US7161738B2 (en) * 2003-08-07 2007-01-09 Agra Vadeko Inc. Secure document of value and method of manufacturing same
DE102008031325A1 (de) * 2008-07-02 2010-01-07 Giesecke & Devrient Gmbh Sicherheitselement sowie Verfahren zu seiner Herstellung
US9453132B2 (en) * 2009-11-27 2016-09-27 Basf Se Coating compositions for security elements and holograms
DE102009058243A1 (de) * 2009-12-14 2011-06-16 Giesecke & Devrient Gmbh Dünnschichtelement mit Mehrschichtstruktur

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MX2018005812A (es) 2018-08-01
DE102015014505A1 (de) 2017-05-11
AU2016352335A1 (en) 2018-05-31
WO2017080641A1 (fr) 2017-05-18
CN108349290B (zh) 2019-10-25
CN108349290A (zh) 2018-07-31
EP3374197A1 (fr) 2018-09-19
AU2016352335B2 (en) 2019-09-19

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