WO2022106050A1 - Élément de sécurité, document de valeur équipé de celui-ci et procédé de fabrication - Google Patents

Élément de sécurité, document de valeur équipé de celui-ci et procédé de fabrication Download PDF

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Publication number
WO2022106050A1
WO2022106050A1 PCT/EP2021/025411 EP2021025411W WO2022106050A1 WO 2022106050 A1 WO2022106050 A1 WO 2022106050A1 EP 2021025411 W EP2021025411 W EP 2021025411W WO 2022106050 A1 WO2022106050 A1 WO 2022106050A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
security element
functional layer
embossing lacquer
relief structure
Prior art date
Application number
PCT/EP2021/025411
Other languages
German (de)
English (en)
Inventor
Winfried HOFFMÜLLER
Andreas Rauch
Friedrich Kretschmar
Florian FRÖHLICH
Original Assignee
Giesecke+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+Devrient Currency Technology Gmbh filed Critical Giesecke+Devrient Currency Technology Gmbh
Publication of WO2022106050A1 publication Critical patent/WO2022106050A1/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
    • B42D25/30—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
    • B42D25/328—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
    • B42D25/425—Marking by deformation, e.g. embossing
    • 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
    • B42D25/465—Associating two or more layers using chemicals or adhesives
    • B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives

Definitions

  • the invention relates to a method for producing a security element suitable for protecting a document of value.
  • the invention also relates to a security element that can be obtained using the method and, moreover, to a document of value that has the security element.
  • Documents of value such as banknotes, branded items or identification documents
  • security elements for security purposes, which allow the authenticity of the documents of value to be checked and which at the same time serve as protection against unauthorized reproduction.
  • Security elements with effects that depend on the viewing angle play a special role in securing authenticity, as these cannot be reproduced even with the most modern copiers.
  • the security elements are equipped with optically variable elements that give the viewer a different image impression from different viewing angles and, for example, show a different color or brightness impression and/or a different graphic motif depending on the viewing angle.
  • the color shift effect is based on viewing-angle-dependent interference effects due to multiple reflections in the various sub-layers of the element.
  • the path difference of the light reflected at the different layers depends on the one hand on the optical thickness of a dielectric Spacer layer, which defines the distance between a semi-transparent absorber layer and a reflection layer, and on the other hand varies with the respective viewing angle.
  • microstructures as optically variable structures, with the microstructures usually being embossed in an embossing lacquer.
  • the optically variable structures can be present, for example, in the form of holograms or hologram-like diffraction structures.
  • EP 1 879154 A2 describes the use of a multi-layer embossing varnish for embossing a microstructure, all layers being initially arranged one on top of the other without or without complete intermediate drying and then being embossed. The coating is fully cured only after embossing.
  • WO 2017/211450 A1 describes the use of a printing ink containing platelet-shaped metal pigments for producing a reflection layer.
  • EP 3392054 A1 describes a security element provided with a liquid crystal material layer, with a relief structure being embossed into the liquid crystal material layer. It has been shown that certain security features for protecting documents of value can only be produced in a manner which, due to the production process, results in irregular contours. Providing a (UV) embossing varnish with embossing structures can often only be carried out in such a way that the varnish is liquid at the time of embossing, which may lead to the formation of bubbles. Furthermore, when embossing layers that are printed in the form of a motif, there is often squeezing, ie the layer is rolled out, which is why fine structuring is not possible.
  • the functional layers arranged above a document of value eg motifs based on effect pigment ink or motifs based on thin-layer systems with a color shift effect, are preferably arranged underneath a protective carrier substrate such as a film.
  • the object of the invention is to provide a method for producing a security element suitable for protecting a document of value with an improved visual appearance. Another object is to provide a security element with a high level of security against forgery and an attractive visual appearance.
  • Method for producing a security element (12) suitable for protecting a document of value (13), comprising a) providing a temporary carrier substrate (1); b) providing the temporary carrier substrate (1) with an embossing lacquer layer (3) into which a relief structure (4) is embossed; c) the typographical application of a functional layer (5) to the embossing lacquer layer (3) in the form of a motif, so that the functional layer (5) adapts to the relief structure (4) on the side facing the embossing lacquer layer (3); d) the application of an opaque layer (6) as a layer adjoining the functional layer (5), the opaque layer (6) masking the functional layer (5), ie overlapping the edge region of the functional layer (5); e) the application of an adhesive layer (7); f) applying a stationary carrier substrate (8) to the adhesive layer (7); and g) removing the temporary carrier substrate (1) from the embossing lacquer layer (3).
  • step c) Method according to one of paragraphs 1 to 3, wherein step c) is followed by the additional step of embossing a further relief structure in the functional layer (5), namely on the side of the functional layer (5) that of the embossing lacquer layer (3) opposite.
  • a functional layer (5) applied by printing in the form of a motif to the embossing lacquer layer (3), the functional layer (5) adapting to the relief structure (4) on the side facing the embossing lacquer layer (3);
  • Security element (12) according to paragraph 12, wherein the security element (12) additionally comprises an adhesive layer (10) suitable for gluing the security element (12) to a document of value (13).
  • value document (14) according to paragraph 14, wherein the value document is based on a value document substrate which has a transparent partial area, in particular a recess, in the area in which the security element (12) is arranged.
  • the document of value mentioned in the present description can be a banknote, in particular a paper banknote, a A polymer banknote or a foil bonded banknote, a stock, a bond, a certificate, a voucher, a check, a high-value admission ticket, but also an identification card, such as a credit card, bank card, cash card, authorization card, ID card or passport personalization page act.
  • a banknote in particular a paper banknote, a A polymer banknote or a foil bonded banknote, a stock, a bond, a certificate, a voucher, a check, a high-value admission ticket, but also an identification card, such as a credit card, bank card, cash card, authorization card, ID card or passport personalization page act.
  • the method according to the invention for producing a security element suitable for protecting documents of value comprises: a) providing a temporary carrier substrate; b) providing the temporary carrier substrate with an embossing lacquer layer into which a relief structure is embossed; c) the typographical application of a functional layer to the embossing lacquer layer in the form of a motif, so that the functional layer adapts to the relief structure on the side facing the embossing lacquer layer; d) the application of an opaque layer as a layer adjoining the functional layer, the opaque layer masking the functional layer, i.e. overlapping the edge region of the functional layer; e) applying an adhesive layer; f) applying a stationary support substrate to the adhesive layer; and g) removing the temporary support substrate from the embossing lacquer layer.
  • a release layer or separating layer can optionally be present between the temporary carrier substrate and the embossing lacquer layer in order to facilitate the detachment of the temporary carrier substrate from the embossing lacquer layer provided with the release layer.
  • embossing varnish a single embossing lacquer layer performs the function of a release layer.
  • the embossing lacquer layer is preferably UV-curing and can optionally have a multilayer structure, as is known, for example, from EP 1 879 154 A2.
  • the embossing lacquer layer is provided with an embossing in order in this way to provide a relief structure such as a diffractive structure or a micro-optical structure.
  • a functional layer is applied by printing in the form of a motif.
  • the functional layer differs from the embossing lacquer layer in particular with regard to the light absorption properties in at least one property.
  • the functional layer is UV-curing and can be embossed in the not yet cured state.
  • the functional layer is provided with an embossing in the course of an additional embossing step in order in this way to provide a further relief structure such as a diffractive structure or a micro-optical structure.
  • the functional layer thus has a relief structure on each of its two main surfaces, independently of one another.
  • the relief structure forming a diffractive structure is in particular a hologram structure.
  • the dimensions of the structural elements of the diffractive structure are preferably in the order of magnitude of the light wavelength, more preferably in a range greater than 100 nm and less than 1 pm, with a range greater than 300 nm and less than 1 pm being particularly preferred.
  • Micro-optical relief structures are known in the prior art (see, for example, WO 2014/060089 A2).
  • the dimensions of the structural elements of a micro-optical relief structure are preferably in a range that is greater than lpm and less than 40 pm, with a range greater than lpm and less than 30 pm being particularly preferred.
  • the dimensions of the structural elements of a micro-optical relief structure have, for example, a height of up to 15 ⁇ m and a lateral extent of up to 30 ⁇ m. Included Both the height and the lateral extent of the structural elements of the micro-optical relief structure are preferably greater than I m.
  • the step of embossing the functional layer a so-called rolling out occurs, which leads to an unsightly deformation of the functional layer in the edge area. Covering up the unsightly edges is therefore desirable in order to improve the visual attractiveness of the security element.
  • This is accomplished with the help of the opaque layer as a layer adjoining the functional layer, with the opaque layer masking the functional layer, ie overlapping the edge region of the functional layer.
  • the opaque layer thus serves to a certain extent as a kind of optical mask.
  • a layer with a high index of refraction as a full-surface layer or a partial-surface layer in the form of a motif which allows embossing to become visible even in non-metallized areas.
  • the production of the security element is completed by arranging an adhesive layer and then a permanent carrier substrate, ie one that remains in the end product. This is followed by separation winding in order to remove the temporary carrier substrate from the layer structure in this way. If necessary, a primer layer is applied to the side of the layer structure on which the temporary carrier substrate was removed. This is followed by the application of an adhesive layer suitable for gluing to a document of value, for example a heat-sealing lacquer.
  • the adhesive layer is preferably applied above the embossing lacquer layer, in particular above the release layer which may be present.
  • the opaque layer is protected by the adhesive layer and the permanent carrier substrate.
  • the permanent Carrier substrate are equipped on its free surface with an ink acceptance layer that is suitable for printing with ink.
  • the ink-receiving layer that may be present is in particular a transparent, printable ink layer that can be obtained by printing technology, which is known, for example, from WO 2012/003947 A1.
  • the printing ink for creating the ink-receptive layer is preferably based on a filler, e.g., silica gel, a crosslinker and a binder.
  • binders used are polyvinyl alcohol, modified polyvinyl alcohol, polyurethane dispersions, acrylate dispersions, and derivatives or mixtures thereof.
  • the crosslinking agent can be selected in particular from the substance class isocyanate, aziridine, carbodiimide or glycidyl ether. Additives, e.g.
  • leveling additives deaerators and/or monoprotic acids can also be included.
  • silica gel a pigment or a mixture of several pigments from the group consisting of boehmite, pseudo-boehmite, zeolite and Al2O3 can be selected as the filler. It can also contain pigments to increase opacity, e.g. TiO?, BaSO4, CaCOs, silicic acids, or polymer-based hollow sphere pigments such as "ROPAQUE" from Rohm & Haas, or effect pigments that create a pearlescent or metallic sheen.
  • the opaque layer is a layer that can be obtained by printing and has black pigments.
  • the opaque layer can in particular be a metallization, a color-shifting thin-layer system with an absorber/dielectric/reflector structure or a reflection layer based on platelet-shaped metal pigments.
  • a printing ink containing platelet-shaped metal pigments for producing a reflection layer is known in the prior art, see for example WO 2017/211450 A1.
  • a metallization is preferably provided by vapor deposition, optionally by means of a mask or by using a wash ink.
  • a soluble wash ink takes place in the form of a desired recess within the reflective layer to be produced, metallization is produced by vapor deposition, and the wash ink is washed off together with the metallization applied above the wash ink.
  • a suitable wash color is described, for example, in EP 1 972462 A2.
  • Suitable platelet-shaped metal pigments for producing an opaque layer are, for example, from WO 2013/186167 A2, WO 2010/069823 A1, WO 2005/051675 A2 (see, for example, the description on page 11, line 10, to page 12, penultimate paragraph ) and WO 2011/064162 A2.
  • the platelet-shaped metal pigments described therein have the advantage that they adapt so well to a substrate with a relief structure, in particular a relief with microstructures and/or nanostructures, that the difference to a conventional metallization obtainable by vapor deposition is almost no longer discernible.
  • the simple, printing-related production of the reflective layer makes it possible to dispense with complex process steps, such as printing with a soluble wash ink in the form of a desired recess within the reflective layer to be produced, creating a metallization by vapor deposition and washing off the wash ink together with that above the wash ink applied metallization.
  • the functional layer is preferably a layer containing dyes and/or color pigments and/or effect pigments or a layer of liquid crystal material. More particularly, the functional layer is a liquid crystal material layer doped with at least one dichroic dye.
  • a security element provided with a liquid crystal material layer and having a relief structure embossed into the liquid crystal material layer is known, for example, from EP 3392054 A1.
  • the dichroic dye can have a functional group which makes it possible to incorporate the dye into the network.
  • An example are dyes with an acrylate head group (which can be incorporated into the network of liquid crystal diacrylates, for example).
  • the dichroic dye can absorb in the visible wavelength range, but also show fluorescence and can be excited with UV light, for example. Liquid crystals by themselves do not show any noticeable light absorption or light reflection. The light absorption is determined by the dichroic dye.
  • fluorescent dyes with polarized fluorescence such as fluorescent dyes with a 9,10-diphenylanthracene fluorophore or a coumarin fluorophore, are suitable.
  • a blue anthraquinone dye and a red azo dye for incorporation into liquid-crystalline polymer networks are described, for example, in WO 02/37147 A1.
  • Dichroic dye-doped liquid crystal material layers can be aligned by means of a relief structure, which has several areas with different orientation directions, in order to produce a hidden motif in the dichroic dye-doped liquid crystal material layer in this way, which is visible to the viewer when illuminated with polarized light with the naked eye is recognizable.
  • the functional layer is provided in the form of a layer containing effect pigments, effect pigments that assume a different shade depending on the viewing angle are particularly suitable.
  • Such effect pigments have, in particular, an interference layer structure which typically comprises a reflection layer, a partially transparent layer or absorber layer and one or more dielectric spacer layers located in between.
  • the dielectric spacer layers are based, for example, on mica, on SiC>2 or on Al2O3.
  • interference layers are referred to as single or multi-layer according to the number of dielectric layers.
  • Printing inks with pigments of such thin-film interference layers are marketed, for example, under the name Iriodin® (single-layer) or Colorcrypt® (multi-layer) by Merck KGaA.
  • OVI® optically variable ink.
  • a special case are magnetically orientable OVI pigments, which are aligned in a preferred direction by means of a magnetic field during or after the printing of the substrate.
  • FIGS. 1 to 6 show an example of the production of a security element according to the invention
  • FIG. 7 shows a further example of a device according to the invention
  • FIG. 8 shows a schematic representation of a bank note with a security element according to the invention.
  • FIG. 8 shows a schematic representation of a banknote 13 with the denomination "20”, which is provided with a strip-shaped security element 12.
  • the banknote 13 is based on a paper substrate 11, which is bonded to the strip-shaped security element 12 by means of an adhesive layer, namely a heat-sealing lacquer is.
  • a temporary carrier substrate 1 is first provided, in the example a polyethylene terephthalate (PET) film.
  • PET polyethylene terephthalate
  • An optional release layer 2 and a UV-curing embossing lacquer layer 3 are applied above the temporary carrier substrate 1 .
  • the embossing lacquer layer 3 is then provided with an embossing structure 4, im Example of a diffractive structure.
  • the embossing lacquer layer 3 is then cured by exposure to UV light.
  • a liquid crystal material layer 5 doped with a dichroic dye is applied in the form of a motif by means of a screen printing process.
  • the liquid-crystalline substance is applied from the melt at elevated temperature.
  • the temperature being set according to the type of liquid-crystalline material, e.g. in a range from 70°C to 110°C, the liquid-crystalline layer 5 doped with at least one dichroic dye is removed with the aid of the relief structure 4 embossed in the embossing lacquer layer 3 aligned and can be crosslinked by UV radiation.
  • the liquid crystal material layer 5 Before crosslinking by means of UV radiation, the liquid crystal material layer 5 can optionally be embossed, so that the liquid crystal material layer 5 is provided on the side opposite the embossing lacquer layer 3, e.g. with a relief structure formed by a microstructure or a nanostructure.
  • an opaque layer 6 is applied as a masking layer adjacent to the liquid crystal material layer 5 such that the edges of the liquid crystal material layer 5 are overlapped by the opaque layer 6.
  • the opaque layer 6 is applied by printing and is based on the printing ink with platelet-shaped metal pigments (in particular Al pigments) known from WO 2005/051675 A2 and leads to produce a reflection layer, in the present case a "silver" mirror layer.
  • the layer structure obtained is provided with an adhesive layer 7 via an optionally present intermediate layer or primer layer (not shown in the figure) and then with a permanent carrier substrate 8, in the example a polyethylene terephthalate (PET) film.
  • a permanent carrier substrate 8 in the example a polyethylene terephthalate (PET) film.
  • the temporary carrier substrate 1 is detached from the embossing lacquer layer 3 provided with the optional release layer 2.
  • the security element is completed by providing the embossing lacquer layer 3 with an optional intermediate layer or primer layer 9 via the optional release layer 2 and then with a heat-sealing lacquer 10 suitable for gluing the security element to a value document substrate 11 .
  • FIG. 7 illustrates a further example of a security element according to the invention, which is based on the security element shown in FIG.
  • the opaque layer in the case of FIG. 7 is formed by a color-shifting thin-layer system.
  • the color-shifting thin-layer system comprises a reflective layer 61, in the example an Al layer, a dielectric layer 62, in the example a SiCb layer, and an absorber layer 63, in the example a Cr layer.

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

Abstract

L'invention concerne un procédé pour fabriquer un élément de sécurité (12) approprié pour sécuriser un document de valeur (13), lequel procédé consiste à a) fournir un substrat de support temporaire (1) ; b) doter le substrat de support temporaire (1) d'une couche de vernis de gaufrage (3) dans laquelle une structure en relief (4) est gaufrée ; c) appliquer, par impression, une couche fonctionnelle (5) sous la forme d'un motif sur la couche de vernis de gaufrage (3) de telle sorte que la couche fonctionnelle (5), sur le côté faisant face à la couche de vernis de gaufrage (3), se conforme à la structure en relief (4) ; d) appliquer une couche opaque (6) en tant que couche adjacente à la couche fonctionnelle (5), la couche opaque (6) masquant la couche fonctionnelle (5), c'est-à-dire recouvrant la région de bord de la couche fonctionnelle (5) ; e) appliquer une couche adhésive (7) ; f) appliquer un substrat de support stationnaire (8) sur la couche adhésive (7) ; et à g) retirer le substrat de support temporaire (1) de la couche de vernis de gaufrage (3).
PCT/EP2021/025411 2020-11-17 2021-10-19 Élément de sécurité, document de valeur équipé de celui-ci et procédé de fabrication WO2022106050A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020007028.0 2020-11-17
DE102020007028.0A DE102020007028A1 (de) 2020-11-17 2020-11-17 Sicherheitselement, mit demselben ausgestattetes Wertdokument und Herstellungsverfahren

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WO2022106050A1 true WO2022106050A1 (fr) 2022-05-27

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