EP3486092B1 - Procédé de fabrication d'un élément de sécurité - Google Patents

Procédé de fabrication d'un élément de sécurité Download PDF

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Publication number
EP3486092B1
EP3486092B1 EP18000911.0A EP18000911A EP3486092B1 EP 3486092 B1 EP3486092 B1 EP 3486092B1 EP 18000911 A EP18000911 A EP 18000911A EP 3486092 B1 EP3486092 B1 EP 3486092B1
Authority
EP
European Patent Office
Prior art keywords
layer
metallic layer
polymeric carrier
metallic
security element
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
EP18000911.0A
Other languages
German (de)
English (en)
Other versions
EP3486092A1 (fr
Inventor
Andreas Rauch
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 EP3486092A1 publication Critical patent/EP3486092A1/fr
Application granted granted Critical
Publication of EP3486092B1 publication Critical patent/EP3486092B1/fr
Active legal-status Critical Current
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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
    • B42D25/30—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
    • B42D25/324—Reliefs
    • 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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser

Definitions

  • the invention relates to a method for producing a strip-shaped security element for documents of value such as bank notes, identity cards or the like, the security element consisting of a polymeric carrier layer with a front side and a rear side.
  • a strip-shaped security element is, for example, a security thread which is at least partially introduced into the substrate of a value document, or a security strip which is applied to the surface of a value document.
  • a method for producing a security element in which a substrate which is translucent for laser radiation has a watermark which modulates the opacity of the substrate.
  • An embossed layer which at least partially covers the watermark is applied to one side of the substrate.
  • a hologram structure is embossed into the embossing layer and a reflector layer is applied to it.
  • the substrate is irradiated with the laser radiation from the opposite side, the intensity of the radiation being set so that the watermark acts as a mask by means of the opacity modulation it causes, so that the reflector layer is ablated in a structured manner by the radiation in the register with the watermark.
  • WO 2009/109343 A2 is a metal transfer process for the production of a foil element with metallic layers registered to one another and a film element that can be produced by means of such a method is known.
  • a first metallic layer provided on a first surface of a flexible, single-layer or multilayer carrier film and a masking layer provided on the second surface of the carrier film opposite the first surface are structured in register with one another by means of synchronized, structuring processes. After the first metallic layer and the masking layer have been structured, one or more additional layers are applied to the first metallic layer.
  • a second metallic layer, to which a first photoactivatable layer is applied, is applied to the one or more further layers.
  • the first photoactivatable layer is structured by means of exposure through the masking layer, the first metallic layer, the one or more further layers and the second metallic layer on the part of the masking layer by means of electromagnetic radiation of a wavelength to which the first photoactivatable layer is sensitive, or the first The photoactivatable layer is exposed, controlled by the masking layer, from the side of the film body opposite the masking layer.
  • the invention is therefore based on the object of developing a method for producing a security element in such a way that the disadvantages of the prior art are eliminated and the number of method steps and the complexity of the production method are reduced overall.
  • a wash color is a laser-resistive color, i.e. a color that is impermeable to laser radiation and almost unaffected, which can be removed again by a subsequent washing process.
  • a wash color is off, for example EP 1023499 B1 , EP 1609619 B1 or
  • EP 1972462 B1 known.
  • Applications of this washing color are for example off EP 1 747 905 A2 , DE 10 2008 008 685 A1 or DE 10 2015 007 233 A1 known.
  • the washing ink is arranged below a metallic coating, so that during a washing process the part of the metallic coating that is located directly above the washing ink is washed off and an opening is created within the metallic coating, the so-called clear text.
  • the clear text is created by removing or transparentizing the metallic layer by means of a laser beam, the metallic layer not being removed or made transparent at the points where it is covered with the washing ink that is impermeable to laser radiation.
  • the wash color thus serves as a mask for the laser radiation and shields it in the entire area of the layer sequence which are arranged in the "core shadow" below the wash color. In these areas, the security element remains opaque; in the surrounding areas next to the wash color, the security element becomes translucent or transparent.
  • the washing color is completely removed again with a washing liquid, for example water, preferably with the aid of a rotating roller coated with felt.
  • a washing liquid for example water
  • the method according to the invention has the particular advantage that there are no adhesion problems on a substrate of a document of value due to remaining toning.
  • the stated toning and the resulting adhesion problems are caused by the fact that gravure printing is used in the methods known from the prior art.
  • gravure printing however, a toning film is always created, as the squeegee is never 100% able to remove the ink in areas of the gravure cylinder that are not to be printed.
  • This thin toning film is now an additional layer, which can lead to weaknesses in the layer structure or in the adhesion to a substrate.
  • the layer thickness of the embossing lacquer layer is preferably 0.5 ⁇ m to 20 ⁇ m and particularly preferably 2 ⁇ m to 5 ⁇ m in each case per layer of embossing lacquer.
  • the layer thickness of the metallic layer is preferably 5 nm to 200 nm or the metallic layer has an optical density of 0.1 oD (optical density) to 5 oD WO 2005/108110 A1 known colorshift coating is used, the visible thicknesses are greater.
  • the layer thickness of the washing color is preferably 0.5 ⁇ m to 15 ⁇ m.
  • At least one further layer sequence comprising an embossed lacquer layer and an opaque metallic layer is applied.
  • the wash color serves as a laser mask for all layers underneath.
  • steps a to c and e are also carried out on the rear side of the polymeric carrier layer.
  • an embossing lacquer layer and an opaque metallic layer or such a layer sequence applied to the front side of the polymeric carrier layer, but also to the rear side of the polymeric carrier layer.
  • the wash color is only applied to the top metallic layer on the front side and serves as a laser mask for all the layers below and the layers on the rear side of the polymeric carrier layer.
  • An exact registration of the demetallization of the two metal layers on the front and back is particularly advantageous.
  • a washing color is also applied to the top of the outermost metallic layer, which is located on the back of the polymeric carrier layer.
  • the wash color is applied to the back of the polymeric carrier layer in exact register with the wash color on the front of the polymeric carrier layer.
  • this wash color is also washed off again from the surface of the metallic layer.
  • Translucency in the context of this invention means that an object, such as the substrate or the plastic film, allows a certain amount of light to pass through. 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 again. The greater the percentage of light passing through in relation to 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 unimpaired like a window, the object is referred to as transparent. On the other hand, an object that allows less than 10% and preferably around 0% of the incident light to pass through, i.e. in which the proportion of the light passing through is low, close to or equal to zero in relation to the incident light, is referred to as opaque or not translucent.
  • See-through is present when the substrate is illuminated from one side and viewed from the other side. There is a top view when the lighting and viewing take place from the same side of the substrate.
  • Documents of value into which such a security element can be inserted or applied are in particular banknotes, shares, bonds, certificates, vouchers, checks, high-quality admission tickets, but also other papers at risk of forgery, such as passports and other identification documents, as well as cards, such as credit or debit cards, the card body of which has at least one layer of security paper, and also product security elements such as labels, seals, packaging, folding boxes, package inserts and the like.
  • the simplified designation of value document includes all of the above materials, documents and product security means.
  • register the positional accuracy of printed images or other elements with respect to one another on the front and / or back of a substrate.
  • register For example, in the case of parts of printed images which, when viewed through, complement one another to form an overall printed image, even slight deviations of less than 0.1 mm between the respective printed images significantly disturb the visual impression when viewed through.
  • DIN 16500-2: 1987-01 defines register as the accuracy in printing technology with which the intended reproduction quality of the details to be reproduced is achieved or maintained.
  • front side or back side of the substrate or value document are relative terms which can also be referred to as “one” and “the opposite” side and which form the major part of the total surface of the substrate or value document. These terms expressly do not include the side surfaces of a substrate or document of value which, with a thickness of a substrate or document of value that is only about one millimeter for card bodies or only fractions of a millimeter for banknotes, are negligible and usually not provided with security elements or coatings will or can become. In particular, no see-through effects can be achieved with the side surfaces.
  • Information within the meaning of this invention is a visually perceptible representation designed in the form of a pattern. This can, for example, form an alphanumeric string of digits and / or letters, a graphic image, an image, a text or other characters.
  • the information particularly preferably consists of positive and / or negative motifs.
  • a motif element itself is applied to the substrate, whereas in the case of 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, an area applied in dark color to the light-colored substrate, which has an unprinted area in the form of a letter within the area.
  • the Fig. 1 shows a side view of a first embodiment of a security element according to the invention before exposure to laser radiation, which consists of a transparent polymeric carrier 1, on the front side of which a first transparent embossed lacquer layer 2.1 with an embossed structure (indicated by the wave-like surface of the embossed lacquer layer 2.1) is applied and a first opaque metallic layer 3.1 is vapor-deposited.
  • a transparent polymeric carrier 1 on the front side of which a first transparent embossed lacquer layer 2.1 with an embossed structure (indicated by the wave-like surface of the embossed lacquer layer 2.1) is applied and a first opaque metallic layer 3.1 is vapor-deposited.
  • layers that are the same, of the same type or are functionally similar are represented by the same hatching.
  • a washing color 4.1 which is impermeable to laser radiation is applied to the metallic layer 3.1, the washing color only covering parts of the metallic layer 3.1.
  • the outline of the wash color forms information that can be
  • the same sequence of layers is applied in mirror image as on the front, consisting of a second transparent embossing lacquer layer 2.2, a second opaque metallic layer 3.2 and wash color 4.2.
  • the laser radiation penetrates the entire sequence of layers of the security element from the front to the rear, with the exception of the parts the sequence of layers below the wash color 4.1.
  • the metallic layers 3.1 and 3.2 are removed by the laser radiation at all points that are not below the wash color 4.1. In contrast, the metallic layers 3.1 and 3.2 are retained at the points below the washing color 4.1.
  • the laser beam changes or only removes the metallic layers 3.1 and 3.2, all other layers of the security element are not or almost not influenced by the laser beam or to an extent that is not relevant for this invention.
  • Openings 6.1 and 6.2 are located between points 5.1 and 5.2 with the opaque metallic layer, which, like points 5.1 and 5.2, are aligned with one another in exact register.
  • a viewer only looks at the transparent embossing lacquer layers 2.1 and 2.2 and the transparent polymeric carrier 1 and can thus look through the security element.
  • the result is an opaque graphic image made up of letters, digits or geometrical structures consisting of points 5.1 and 5.2 and transparent openings 6.1 and 6.2.
  • Fig. 3 shows a side view of a second embodiment of a security element according to the invention before exposure to laser radiation, which is in contrast to the embodiment FIGS. 1 and 2 located only on the front of the carrier 1.
  • the security element consists of a transparent polymeric carrier 1, on the front side of which a first transparent embossed lacquer layer 2.1 with a first embossed embossed structure is applied and a first opaque metallic layer 3.1 is vapor-deposited thereon.
  • a further transparent embossed lacquer layer 2.3 is applied to the metallic layer 3.1, which at least partially fills the embossed structure of the first embossed lacquer layer 2.1 and into which a second embossed structure, preferably different from the first embossed structure, is embossed.
  • the second embossed structure can of course also be designed in the same way as the first embossed structure.
  • a second metallic layer 3.2 is vapor-deposited onto the second embossed structure and a washing color 4.1 that is impermeable to laser radiation is applied to it, the washing color being the same as in FIG Fig. 1 only parts of the metallic layer 3.1 covered.
  • the outline of the wash color forms information that can be recognized by a viewer, for example a graphic image, letters, numbers or geometric structures.
  • the second metallic layer 3.2 is transparent to laser radiation, so that the laser radiation penetrates the layer structure up to the first metallic layer 3.1 and changes, evaporates or removes it and thereby also evaporates or removes the layers overlying the first metallic layer 3.1.
  • the second metallic layer 3.2 can also be made opaque to laser radiation, so that the laser beam initially changes or removes the second metallic layer 3.2 and, given a sufficiently long exposure time, then changes or removes the first metallic layer 3.1 through the layer structure and thereby the layers lying above the first metallic layer 3.1 are also changed or removed.
  • the subsequent washing process corresponds to the washing process of the first embodiment FIGS. 1 and 2 .

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Credit Cards Or The Like (AREA)

Claims (4)

  1. Procédé de production d'un élément de sécurité en forme de bande destiné à des documents de valeur tels que des billets de banque, des cartes d'identité ou analogues, l'élément de sécurité comprenant une couche de support polymère (1) pourvue d'une face avant et d'une face arrière, le procédé comprenant les étapes suivantes
    a. appliquer une couche de vernis gaufrée (2.1) sur la face avant de la couche de support polymère (1),
    b. introduire une structure gaufrée dans la couche de vernis gaufrée (2.1),
    c. appliquer une couche métallique opaque (3.1) sur la face supérieure de la structure gaufrée, la couche métallique (3.1) recouvrant au moins partiellement la face supérieure de la structure gaufrée,
    d. appliquer une couleur de lavage (4.1) sur la face supérieure de la couche métallique (3.1), la couleur de lavage (4.1) et la couche métallique (3.1) se chevauchant au moins partiellement et le contour de la couleur de lavage (4.1) formant une information qui peut être reconnue par un observateur,
    e. enlever la couche métallique (3.1) de la face supérieure de la structure gaufrée, ou rendre la couche métallique transparente, au moyen d'un faisceau laser (L), la couche métallique (3.1) n'étant pas retirée ou rendue transparente aux emplacements (5.1) où elle chevauche la couleur de lavage (4.1),
    f. laver la couleur de lavage (4.1) de la surface de la couche métallique (3.1) au moyen d'un liquide de lavage.
  2. Procédé selon la revendication 1, caractérisé en ce que au moins une autre succession de couches comprenant la couche de vernis gaufrée (2.3) et la couche métallique opaque (3.2) est appliquée entre les étapes c et d.
  3. Procédé selon l'une au moins des revendications précédentes, caractérisé en ce que les étapes a à c et e sont en outre réalisées sur la face arrière de la couche de support polymère (1).
  4. Procédé selon la revendication 3, caractérisé en ce que une couleur de lavage (4.2) est appliquée sur la face supérieure de la couche métallique la plus externe (3.2), qui est située sur la face arrière de la couche de support polymère (1), la couleur de lavage (4.2) étant appliquée sur la face arrière de la couche de support polymère (1) en étant calée exactement sur la couleur de lavage (4.1) présente sur la face avant de la couche de support polymère (1) et étant à nouveau lavée de la surface de la couche métallique (3.2) après avoir enlevé la couche métallique (3.2) de la face supérieure de la structure gaufrée, ou après avoir rendu la couche métallique transparente, au moyen d'un faisceau laser (L).
EP18000911.0A 2017-11-21 2018-11-19 Procédé de fabrication d'un élément de sécurité Active EP3486092B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017010744.0A DE102017010744A1 (de) 2017-11-21 2017-11-21 Verfahren zum Herstellen eines Sicherheitselementes mit einer durch Laserstrahlung erzeugten Öffnung in einer metallischen Schicht

Publications (2)

Publication Number Publication Date
EP3486092A1 EP3486092A1 (fr) 2019-05-22
EP3486092B1 true EP3486092B1 (fr) 2021-01-06

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Application Number Title Priority Date Filing Date
EP18000911.0A Active EP3486092B1 (fr) 2017-11-21 2018-11-19 Procédé de fabrication d'un élément de sécurité

Country Status (2)

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EP (1) EP3486092B1 (fr)
DE (1) DE102017010744A1 (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19739193B4 (de) 1997-09-08 2006-08-03 Giesecke & Devrient Gmbh Verfahren zur Herstellung von Sicherheitsfolien für Wertpapiere
DE10333469A1 (de) * 2003-07-22 2005-02-10 Giesecke & Devrient Gmbh Sicherheitselement
DE102004022080A1 (de) 2004-05-05 2005-11-24 Giesecke & Devrient Gmbh Wertdokument mit visuell erkennbaren Kennzeichnungen
DE102004031043A1 (de) 2004-06-25 2006-01-12 Giesecke & Devrient Gmbh Sicherheitselement mit eingebrachten Motiven
DE102005034671A1 (de) * 2005-07-25 2007-02-01 Giesecke & Devrient Gmbh Sicherheitselement und Verfahren zu seiner Herstellung
DE102007055112A1 (de) 2007-01-05 2008-07-10 Giesecke & Devrient Gmbh Verfahren zur Herstellung von Sicherheitsfolien
DE102008008685A1 (de) * 2008-02-12 2009-08-13 Giesecke & Devrient Gmbh Sicherheitselement und Verfahren zu seiner Herstellung
DE102008013073B4 (de) 2008-03-06 2011-02-03 Leonhard Kurz Stiftung & Co. Kg Verfahren zur Herstellung eines Folienelements und Folienelement
DE102010019766A1 (de) * 2010-05-07 2011-11-10 Giesecke & Devrient Gmbh Verfahren zur Erzeugung einer Mikrostruktur auf einem Träger
DE102014106340B4 (de) * 2014-05-07 2021-05-12 Ovd Kinegram Ag Mehrschichtkörper und Verfahren zu dessen Herstellung sowie Sicherheitsdokument
DE102015007233A1 (de) * 2015-06-05 2016-12-08 Giesecke & Devrient Gmbh Verfahren zum Herstellen eines Sicherheitselements, daraus erhältliches Sicherheitselement, Sicherheitspapier und Wertdokument
DE102016009440A1 (de) 2016-08-03 2018-02-08 Giesecke+Devrient Currency Technology Gmbh Verfahren zum Herstellen eines Sicherheitselementes

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
EP3486092A1 (fr) 2019-05-22
DE102017010744A1 (de) 2019-05-23

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