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EP3290225B1 - Element de securite avec une pluralite de caracteristiques de securite - Google Patents

Element de securite avec une pluralite de caracteristiques de securite Download PDF

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Publication number
EP3290225B1
EP3290225B1 EP17001359.3A EP17001359A EP3290225B1 EP 3290225 B1 EP3290225 B1 EP 3290225B1 EP 17001359 A EP17001359 A EP 17001359A EP 3290225 B1 EP3290225 B1 EP 3290225B1
Authority
EP
European Patent Office
Prior art keywords
layer
optically variable
metallic
security element
substrate
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
EP17001359.3A
Other languages
German (de)
English (en)
Other versions
EP3290225A1 (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
Original Assignee
Giesecke and Devrient Currency Technology 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
Application filed by Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Publication of EP3290225A1 publication Critical patent/EP3290225A1/fr
Application granted granted Critical
Publication of EP3290225B1 publication Critical patent/EP3290225B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40Manufacture
    • B42D25/45Associating two or more layers
    • B42D25/465Associating two or more layers using chemicals or adhesives
    • B42D25/47Associating two or more layers using chemicals or adhesives using adhesives

Definitions

  • the invention relates to methods for producing a security element for security papers, documents of value or the like, which has a transparent or translucent substrate made of a plastic film, a metallic or optically variable coating being applied to the substrate.
  • a security element with a substrate, to which an optically variable coating in the form of an interference-capable, multilayer structure is applied is for example from US Pat WO 2005/108110 A1 or the WO 2005/038136 A1 known.
  • the multi-layer structure capable of interference consists of a reflection layer, a dielectric layer and a partially transparent layer, the dielectric layer being arranged between the reflective layer and the partially transparent layer. Because of its mode of operation, such a security element is also referred to as a thin film layer interference layer structure or as a color shift element.
  • an optically variable coating in the sense of this invention is a coating whose visual appearance changes when the Elements changes. For example, when the optically variable coating is tilted, its color changes from purple to green, a bar appears to move from one side of the element to another, different characters are displayed when tilted, or there is a so-called pumping effect in the form of an enlarging or reducing Outline of a picture motif.
  • An optically variable coating is also a coating into which a diffractive structure known from the prior art or a hologram is embossed.
  • a metallic coating in the sense of this invention consists of a metal or a material that has a reflective and shiny metallic surface, for example a lacquer layer in which metallic pigments are embedded.
  • the invention has for its object to develop a generic security element such that the protection against counterfeiting is further increased.
  • a security element for security papers, documents of value or the like is produced with the method steps according to claim 1.
  • Translucency in the sense of this invention means that an object, such as the substrate or the plastic film, allows incident light to pass through in a certain proportion. If light strikes one side of the object, a certain proportion of the light is let through to the other side of the object and exits there. The greater the percentage of light passing through based on the incident light, the more translucent the object. If the percentage is at least 90%, i.e. if the object allows the incident light to pass through almost unattenuated like a window, the object is said to be transparent.
  • An object, however, that allows less than 10% and preferably about 0% of the incident light to pass through, i.e. in which the proportion of the light passing through is small or close to or equal to zero in relation to the incident light, is referred to as opaque or not translucent.
  • a register or register in the sense of this invention, the positional accuracy of printed images or other elements relative to one another on the front and / or back of a substrate or on different substrates designated. For example, even small deviations of less than 0.1 mm between the respective printed images considerably disrupt the visual impression when looking through in the case of parts of printed images which complement one another to form an overall printed image.
  • DIN 16500-2: 1987-01 defines the accuracy in printing technology with which the intended reproduction quality of the details to be reproduced is achieved or maintained.
  • diffractive structures and / or micromirrors are introduced into the first substrate before method step [1.2] and in step [1.2] the first optically variable coating is arranged on the diffractive structures and / or micromirrors.
  • diffractive structures and / or micromirrors can be introduced into the second substrate before method step [1.4] and in step [1.4] the second metallic or optically variable coating is arranged on the diffractive structures and / or micromirrors.
  • the first optically variable coating is formed by a color layer which contains platelet-shaped metallic particles whose longest edge length is 15 nm to 1000 nm and whose thickness is 2 nm to 100 nm, so that the color layer is reflected in incident light metallic, preferably golden hue and in transmitted light shows a colorful, preferably blue hue.
  • the platelet-shaped metallic particles preferably have a longest edge length of 15 nm to 600 nm and particularly preferably 20 nm to 500 nm and a thickness of 2 nm to 40 nm and particularly preferably 4 nm to 30 nm.
  • a color layer is, for example, from the WO 2011/064162 A2 known and is also called gold-blue color. Transmitted light is present when an object is illuminated from one side and viewed from the other side. incident is when the lighting and viewing are from the same side of an object.
  • a color layer with a metallic color tone is a color layer that has a metallic reflecting surface with a metallic color tone that is preferably golden or gold-colored, silver-colored or silver-colored or bronze-colored.
  • a color layer with a colored hue is a color layer which has a single or multi-colored surface, preferably a single-color blue, a single-color green or a single-color red.
  • the metallic coating consists of a metal, preferably of aluminum.
  • a gold-blue effect can be obtained with other colors of a top view / see-through effect with a hologram or with micromirrors.
  • a top view shows gold and see through blue and a top view shows purple and see through green.
  • a film composite that contains two different metallic overlay colors and two different see-through colors thus results particularly advantageously.
  • a printing acceptance layer which would have to be laminated or printed on the first film anyway, is also present due to the lamination. An additional effort or additional expense is therefore only due to the embossing of the UV varnish and the metallization.
  • a film composite can be produced which contains areas with a gold-blue effect obtained in the PVD process in addition to color shift or aluminum areas.
  • the color palette mentioned above is by no means limited to gold / blue.
  • Other colors or see-through colors are e.g. B. pink / turquoise; Silver / Purple; Blue yellow; Purple / green.
  • the invention is not only limited to the gold-blue effect mentioned above, but other color pairs can also be used, since the different color impressions result only from the layer thickness of the dielectric layer.
  • the metallic or optically variable coating is designed in a pattern and represents visually perceptible information.
  • This can form, for example, a graphic illustration, an image, a number, a letter, a text or other characters.
  • the information particularly preferably consists of positive or negative motifs.
  • a positive motif a motif element itself is applied to the substrate, whereas with a negative motif the area surrounding the motif element is applied to the substrate.
  • a positive motif is, for example, a letter printed in dark color on the light substrate.
  • a negative motif is, for example, a surface that is applied to the substrate in dark color and has an unprinted area in the form of a letter within the surface.
  • At least one of the dielectric layers of the interference-capable, multilayer structure consists of silicon dioxide (SiO 2 ).
  • a dielectric layer can consist of a transparent printing layer that has a constant thickness.
  • the partially permeable layer of the multi-layer structure capable of interference preferably consists of at least chromium and / or nickel.
  • a film which contains areas with a gold-blue effect obtained in the PVD process in addition to color shift or aluminum areas cannot be produced on a film by a mere metallization known from the prior art, since there are too few control marks, liability problems occur and multiple wash color printing is required.
  • the translucent, preferably transparent substrate, on which the security element according to the invention can be applied particularly preferably consists of at least one plastic film.
  • a lacquer layer which preferably consists of an embossing lacquer, can particularly preferably be arranged between the security element and the carrier.
  • Such an embossing lacquer can, for example, be a UV lacquer, i.e. a varnish that hardens under the influence of ultraviolet light, or a thermoplastic embossing varnish. Diffractive structures, holograms or micromirrors are preferably embossed in this embossing lacquer.
  • the thickness of this lacquer layer is 1 ⁇ m to 12 ⁇ m, preferably 2 ⁇ m to 7 ⁇ m.
  • Valuable documents in which a security element according to the invention can be used are, in particular, banknotes, shares, bonds, certificates, vouchers, checks, high-quality admission tickets, but also other papers which are at risk of forgery, such as passports and other identification documents, as well as cards, such as credit or debit cards, and also product securing elements such as labels, seals, packaging and the like.
  • These documents of value particularly preferably have at least one opening, above which the security element according to the invention is arranged.
  • the security element according to the invention is arranged on the surface of the document of value in such a way that it at least partially overlaps the opening or opening of a document of value.
  • the security element according to the invention particularly preferably completely overlaps the opening or opening of the value document, so that it closes the opening or opening of the value document.

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Credit Cards Or The Like (AREA)
  • Holo Graphy (AREA)

Claims (12)

  1. Procédé de fabrication d'un élément de sécurité pour papier sécurisé, documents de valeur et apparentés, avec les étapes de procédé suivantes
    [1.1] préparation d'un premier substrat à partir d'un film plastique translucide,
    [1.2] dépôt d'un premier revêtement optiquement variable sur le premier substrat,
    [1.3] préparation d'un deuxième substrat à partir d'un film plastique,
    [1.4] dépôt d'un deuxième revêtement métallique ou optiquement variable sur le deuxième substrat, dans lequel le deuxième revêtement métallique ou optiquement variable est différent du premier revêtement optiquement variable,
    [1.5] lamination en parfait repérage du premier substrat sur le deuxième substrat, de façon à obtenir une composition à plusieurs couches,
    [1.6] soustraction du deuxième substrat de la composition à plusieurs couches,
    dans lequel le premier revêtement optiquement variable est formé d'une couche de couleur, laquelle contient des particules métalliques en forme de paillettes, dont la plus grande longueur d'arête vaut entre 15 nm et 1000 nm et dont l'épaisseur vaut entre 2 nm et 100 nm, de sorte que la couche de couleur présente à la lumière incidente une teinte métallique, de préférence dorée, et à la lumière transmise une teinte colorée, de préférence bleue, ou
    est formé d'une composition à plusieurs couches, laquelle comporte au moins deux couches-miroirs semi-transparentes et au moins une couche diélectrique agencée entre les au moins deux couches-miroirs, dans lequel le revêtement optiquement variable présente, à la mesure de la transmission de lumière non-polarisée dans la gamme de longueurs d'onde bleue de 420 nm à 490 nm, une résonance avec une largeur à mi-hauteur de 70 nm à 150 nm.
  2. Procédé selon la revendication 1, caractérisé en ce que préalablement à l'étape de procédé [1.2] des structures diffractives et/ou des micro-miroirs sont introduits dans le premier substrat et le premier revêtement métallique ou optiquement variable est agencé sur les structures diffractives et/ou les micro-miroirs à l'étape [1.2].
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que préalablement à l'étape de procédé [1.4] des structures diffractives et/ou des micro-miroirs sont introduits dans le deuxième substrat et le deuxième revêtement métallique ou optiquement variable est agencé sur les structures diffractives et/ou les micro-miroirs à l'étape [1.4].
  4. Élément de sécurité, fabriqué selon l'une des revendications précédentes, caractérisé en ce que les particules métalliques en forme de paillettes possèdent une longueur d'arête la plus grande valant de préférence entre 15 nm et 600 nm et plus particulièrement entre 20 nm et 500 nm et une épaisseur valant de préférence entre 2 nm et 40 nm et plus particulièrement entre 4 nm et 30 nm.
  5. Élément de sécurité, fabriqué selon l'une des revendications 1 à 3, caractérisé en ce que la résonance est l'unique résonance dans le spectre visible.
  6. Élément de sécurité selon la revendication 5, caractérisé en ce que les au moins deux couches-miroirs semi-transparentes sont formées à partir d'aluminium ou d'un alliage d'aluminium et la couche d'écartement diélectrique d'une épaisseur h et avec un indice de réfraction v satisfait la relation 120 nm < h · v < 190 nm.
  7. Élément de sécurité selon la revendication 5, caractérisé en ce que les au moins deux couches-miroirs semi-transparentes sont formées à partir d'argent ou d'un alliage d'argent et la couche d'écartement diélectrique d'une épaisseur h et avec un indice de réfraction v satisfait la relation 120 nm < h · v < 170 nm ou 340 nm < h · v < 400 nm.
  8. Élément de sécurité selon l'une des revendications 4 à 7, caractérisé en ce que le revêtement métallique ou optiquement variable est constitué d'une composition à plusieurs couches susceptible d'interférence, dans lequel la composition à plusieurs couches susceptible d'interférence comporte au moins les couches suivantes : une couche de réflexion, une couche diélectrique et une couche semi-translucide, dans lequel la couche diélectrique est agencée entre la couche de réflexion et la couche semi-translucide.
  9. Élément de sécurité selon l'une des revendications 4 à 7, caractérisé en ce que le revêtement métallique ou optiquement variable est constitué d'un métal, de préférence d'aluminium.
  10. Élément de sécurité selon l'une des revendications 4 à 9, caractérisé en ce que le revêtement métallique ou optiquement variable est conçu en forme de motif et produit une information visuellement perceptible, par exemple une figure graphique, une image, un nombre, un caractère, un texte ou d'autres signes.
  11. Élément de sécurité selon l'une des revendications 4 à 10, caractérisé en ce qu'au moins une des couches diélectriques est constituée d'une couche imprimée transparente ou de dioxyde de silicium.
  12. Élément de sécurité selon l'une des revendications 4 à 11, caractérisé en ce que la couche semi-translucide est constituée au moins de chrome et/ou de nickel.
EP17001359.3A 2016-09-01 2017-08-08 Element de securite avec une pluralite de caracteristiques de securite Active EP3290225B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016010616.6A DE102016010616A1 (de) 2016-09-01 2016-09-01 Sicherheitselement mit mehreren Sicherheitsmerkmalen

Publications (2)

Publication Number Publication Date
EP3290225A1 EP3290225A1 (fr) 2018-03-07
EP3290225B1 true EP3290225B1 (fr) 2020-01-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17001359.3A Active EP3290225B1 (fr) 2016-09-01 2017-08-08 Element de securite avec une pluralite de caracteristiques de securite

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EP (1) EP3290225B1 (fr)
DE (1) DE102016010616A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019003947A1 (de) * 2019-06-06 2020-12-10 Giesecke+Devrient Currency Technology Gmbh Verfahren zum Herstellen eines optisch variablen Sicherheitselements
DE102020007728A1 (de) 2020-12-17 2022-06-23 Giesecke+Devrient Currency Technology Gmbh Datenträger mit Verbundsubstrat mit einem in einem Durchsichtsbereich angeordneten Sicherheitselement

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10349000A1 (de) 2003-10-17 2005-05-19 Giesecke & Devrient Gmbh Sicherheitselement mit Farbkippeffekt
DE102004022080A1 (de) 2004-05-05 2005-11-24 Giesecke & Devrient Gmbh Wertdokument mit visuell erkennbaren Kennzeichnungen
AU2010323218B2 (en) 2009-11-27 2014-07-31 Basf Se Coating compositions for security elements and holograms
DE102009058243A1 (de) 2009-12-14 2011-06-16 Giesecke & Devrient Gmbh Dünnschichtelement mit Mehrschichtstruktur
SI2578414T1 (sl) * 2011-10-04 2014-08-29 Hueck Folien Gesellschaft M.B.H. Varnostni element z učinkom barve, ki se spreminja glede na zorni kot, postopek za njegovo izdelavo in njegova uporaba
RU2621558C9 (ru) * 2012-08-17 2017-12-05 Визуал Физикс, Ллс Процесс переноса микроструктур на конечную подложку

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3290225A1 (fr) 2018-03-07
DE102016010616A1 (de) 2018-03-01

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