WO2011057759A1 - Procédé pour fabriquer un élément de sécurité avec des métallisations adaptées et élément de sécurité obtenu avec ce procédé - Google Patents

Procédé pour fabriquer un élément de sécurité avec des métallisations adaptées et élément de sécurité obtenu avec ce procédé Download PDF

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Publication number
WO2011057759A1
WO2011057759A1 PCT/EP2010/006819 EP2010006819W WO2011057759A1 WO 2011057759 A1 WO2011057759 A1 WO 2011057759A1 EP 2010006819 W EP2010006819 W EP 2010006819W WO 2011057759 A1 WO2011057759 A1 WO 2011057759A1
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WO
WIPO (PCT)
Prior art keywords
layer
security element
resist
reflective
areas
Prior art date
Application number
PCT/EP2010/006819
Other languages
German (de)
English (en)
Inventor
Winfried HOFFMÜLLER
Theodor Burchard
Original Assignee
Giesecke & Devrient 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 Gmbh filed Critical Giesecke & Devrient Gmbh
Priority to EP10778569.3A priority Critical patent/EP2498998B1/fr
Publication of WO2011057759A1 publication Critical patent/WO2011057759A1/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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • 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
    • 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
    • B42D25/351—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
    • B42D25/425—Marking by deformation, e.g. embossing
    • B42D2033/18—
    • B42D2033/26—
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/391—Special inks absorbing or reflecting polarised light
    • 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 having two metallizations which have been matched to one another and two optically active layers which are arranged on both sides of the security element and which each form a phase delay layer for light passing through, the security element having visually recognizable signs in transmitted light and preferably also in incident light , a security element obtainable by the method, the security element designed as a transfer element, the use of the security element or transfer element for product security, a valuable article equipped with the security element and a method for producing such a valuable article.
  • Valuables in particular value documents such as banknotes, shares, identity cards, credit cards, certificates, checks, and other forgery-prone papers, such as identification documents of various kinds, as well as branded articles and packaging of branded goods, are often provided with security elements to secure their authenticity and at the same time serve as protection against unauthorized reproduction.
  • the security elements may, for example, take the form of security threads or stickers or any other form insertable or attachable to a valuable article or security paper, a "valuable article" within the meaning of the present invention being any objectionable to counterfeiting, in particular a value document, while a "security paper "represents the precursor to a value document, which is not yet ready for use.
  • Security elements are typically multilayer elements with multiple functional layers.
  • Functional layers are generally layers that have any properties that can be detected visually or by machine. Functional layers therefore contain, for example, dyes, luminescent substances, thermochromic substances, liquid crystals, interference pigments, electrically conductive substances, magnetic substances, light-diffractive or refractive structures or combinations thereof.
  • the functional layers are usually designed as geometric or figurative patterns or motifs, ie there are functional areas within a layer with the detectable property (for example luminescence) and recesses in between. If a plurality of functional layers are arranged one above the other, it is generally desirable for the functional regions and the recesses in the individual functional layers to be formed exactly in register, ie with high register accuracy, and with contour-sharp edges between the functional regions and the recesses. In this way, one functional layer can be hidden under another, for example magnetic substances under a colored layer, or security elements with multiple functional layers and "negative writing" can be produced.
  • Negative-type security elements comprise a transparent substrate having at least one non-transparent coating having recesses (the negative writing). These recesses may have any shapes, such as letters, numbers or patterns of any kind, especially line patterns.
  • the term "negative writing" as used in this application accordingly comprises recesses of any shape, ie any non-solidity in a non-transparent coating The more transparent, ie the more translucent, the carrier substrate is, the more pronounced is the contrast between coated and uncoated regions. In the case of very transparent substrates, the negative writing is clearly recognizable in incident light, with less transparent substrates only in transmitted light. If such a security element with negative writing has two different functional layers, for example a motif in the form of a gold-colored metallic coating and the same motif as the red printing ink, then this motif appears to the viewer golden-colored from one side and red from the other side.
  • the tamper-proof is the higher the finer the structures in the functional layers are with the matched-to-each other motifs. Finely contoured structures and forming the perfect register with each other, however, also pose a challenge for authorized manufacturers.
  • a number of methods are known which are intended to enable recesses in a plurality of superimposed functional layers to be registered precisely. H. congruent in all layers, train.
  • WO 92/11142 it is known to produce negative writings in functional layers by means of heat-activatable printing inks.
  • the printing inks are printed in the form of the desired negative writing under the functional layers and contain waxes or intumescent additives which soften when heated or split off a gas and thereby produce foam structures. This reduces the adhesion in the areas printed with the activatable ink, and the functional layers can be mechanically removed in these areas.
  • DE 10 2007 055 112 discloses a method for register-containing, d. H. Conformity of forming a negative typeface in a plurality of functional layers with the aid of a printed in the form of trainees negatives printed under the functional layers ink containing a component which causes a process when irradiated or heated or in contact with a washing liquid, which causes the side
  • the ink is applied to the overlying coating a force that breaks the coating. This force can be exerted by a gas generated from constituents of the ink when they come into contact with washing liquid, irradiated and / or heated, or by a source in the ink, which swells upon contact with a washing liquid. Once the multilayer coating has been broken, it is relatively easily accessible for washing with washing liquid.
  • Object of the present invention is also to provide a security element with two motif layers with corresponding patterns or motifs, which have a high registration accuracy.
  • One aspect of the invention relates to a method for producing a security element with negative writing for a security paper or a valuable article, in particular a value document, comprising the following steps:
  • a further aspect of the invention relates to a security element with negative writing which is obtainable according to the above-mentioned method for attachment to or at least partial introduction into a security paper or a valuable article, in particular a value document which is made up of several layers which each cover the entire security - or at least part of the security element, the layers having at least the following:
  • a first reflective layer optionally with first reflective areas and first recesses forming a pattern, if necessary. is due to the pattern of the resist layer,
  • a second reflective layer having second reflective regions and second recesses forming a pattern at least partially due to the pattern of the resist layer, a first optically active layer forming a phase retardation layer for transmitted light above the second reflective regions, and a second optically active layer, which forms a phase retardation layer for transmitted light, above the side of the first carrier substrate opposite the first optically active layer,
  • the resist areas directly adhere the first reflective layer and the second reflective layer
  • the security element between the first carrier substrate and the first reflective layer has at least one embossing lacquer layer.
  • the basic idea of the present invention is to use a stickable resist layer to form congruent patterns in two functional layers.
  • a resist layer in the form of the desired pattern is applied to a first functional layer.
  • the pattern is exactly reproduced in the first functional layer, not by the be removed by the resist protected areas of the first functional layer.
  • the pattern in the second functional layer is reproduced by adhering the second functional layer to the resist.
  • the bonding only takes place in the areas in which the second functional layer makes contact with the resist.
  • the non-bonded regions of the second functional layer are then removed, while the bonded regions can not be removed, whereby an exact reproduction of the pattern of the resist layer and the first functional layer is produced in the second functional layer.
  • the security element according to the invention is produced from a layer structure obtainable from two partial elements.
  • the layer structure is expelled on both sides, each with an optically active layer which forms a phase retardation layer for light passing through.
  • a first subelement consists at least of a carrier substrate and a functional layer, preferably with recesses therein. Additional layers may be present.
  • the functional layer can also be composed of several individual layers.
  • the carrier substrate of the first security element partial element is preferably a film, for example made of polypropylene, polyethylene, polystyrene, polyester, in particular polycarbonate or polyethylene terephthalate. Transparent or translucent films are particularly preferred. When using such films, the register-formed recesses in the individual functional layers can be clearly recognized as negative writing.
  • a great advantage of the method according to the invention is that it does not require an exposure step, since the resist in the form of the desired motif can be applied by means of methods known per se. Accordingly, the method according to the invention makes it possible to produce precisely calibrated functional layers without exposure steps, the security elements according to the invention nevertheless being characterized by a very high security against counterfeiting.
  • the functional layer is a reflective layer, eg, a metal layer or metallization, preferably selected from the group consisting of aluminum, iron, copper, gold, nickel, and alloys of one or more of these elements.
  • a layer of metallic effect paints, a layer with interference pigments or a thin-film element layer can also be used as the functional layer.
  • High-index layers of, for example, T1O2 or Si0 2 are also suitable as functional layers.
  • the application of the functional layers is carried out by known methods that are suitable for the respective functional layer, for example by physical vapor deposition (PVD) in metals or by printing on color pigments. The application can be made over the entire area or only in partial areas.
  • PVD physical vapor deposition
  • the functional layer can be formed directly on the carrier substrate, or one or more intermediate layers can be provided.
  • intermediate layers are absolutely necessary, for example if the motif of the functional layer is is a metallized hologram, kinegram, pixelgram or other metallized diffraction structure.
  • first an embossing lacquer layer is applied and embossed into the embossing lacquer layer, before or after the metallization, the desired diffractive structure.
  • the carrier film can also be suitably treated.
  • one of the motif layers is a metallized diffraction structure such as a metallized hologram
  • a further motif layer is particularly preferably a metallized diffraction structure, such as a metallized hologram.
  • holograms are used below, it is understood that the same applies to other diffraction structures and refractive structures as well as to so-called “matte structures” (lattice images with achromatic grating regions), as defined, for example, in WO 2007/107235 A1 and are described (see in particular claim 1).
  • an embossing lacquer layer which contains the desired structural information embossed.
  • the structure information is transmitted when glued to the second security element subelement.
  • Holograms or structural information in general can be identical or different in the functional layers of a security element according to the invention.
  • Materials for embossing lacquer layers are known to a person skilled in the art. Suitable embossing lacquers are disclosed, for example, in DE 10 2004 035 979 A1, which discloses heat-sealing lacquers which can likewise be used as an embossing lacquer.
  • a resist is applied to the functional layer of the first security element partial element in a further step.
  • a resist is understood to mean any material which allows the process according to the invention to be carried out to produce a security element according to the invention.
  • a resist material must be able to protect regions of the first functional layer from removal in order to produce first recesses in the first functional layer only in the unprotected regions.
  • the resist material must have sufficient adhesiveness to bond first and second functional areas together.
  • suitable as resist materials are compounds which can protect areas of the first functional layer from removal and are sufficiently adhesive. Suitable resist materials are therefore, for example, various thermoplastic materials. Preference is given to using thermoplastic resist coatings. Examples of resist coatings according to the invention are given below.
  • the resist is preferably applied in the form of the desired pattern, for example printed.
  • the person skilled in the art is known for suitable printing methods.
  • the functional layer of the first security element partial element ie the first functional layer
  • the pattern of the resist layer is transferred into the first functional layer.
  • the transmission takes place in such a way that the regions of the first functional layer not protected by resist are removed, in the case of metallic functional layers for example by etchants such as alkalis or acids, for printing inks for example by washing out with suitable solvents. Suitable methods are known to the person skilled in the art.
  • the first safety The subunit element now has a pattern which has congruent functional areas and resist areas and also congruent recesses between these areas.
  • the pattern may, for example, form an encoding or a geometric or figurative motif.
  • the second security element partial element has, like the first security element partial element, at least two layers, namely a carrier substrate and a functional layer formed thereon.
  • additional layers may be present, or must be present, as stated above for the first security element subelement.
  • the carrier substrate of the second security element subelement is later separated together with parts of the functional layer of the second security element subelement, for. B.
  • the functional layer has only a slight adhesion to the carrier substrate.
  • the adhesive force between the carrier substrate and the functional layer is too high, it can be reduced by treating the carrier substrate with suitable additives.
  • the carrier substrate can be washed off with water and / or solvents with or without suitable additives.
  • suitable additives are, for example, surface-active substances, defoamers or thickeners. Additives can also be introduced into the carrier substrate itself. Alternatively, adhesion-reducing layers can be provided under the functional layer.
  • adhesion reducing layers materials are selected on the surfaces of which, as is generally known, a relatively poor adhesion occurs, for example siliconizations, layers containing release additive (eg Byk 3500), waxes, cured UV lacquers, metallizations, untreated films, such as, for example , Eg PET.
  • the adhesive force between the intermediate layer and the functional layer ie for example between the embossing lacquer layer and a metallization applied thereon, must be correspondingly low. If the adhesive force is too high, the intermediate layer should be treated with the above-mentioned additives or an adhesion-reducing layer should be provided.
  • residues of the additives can remain on the functional layer after the carrier substrate or the intermediate layer has been separated off. These can normally be washed away simply with an aqueous solution whose pH is suitably adjusted and which may optionally also contain surfactants. Even a laundry with solvents is possible. In persistent cases, high-pressure nozzles and / or mechanical support (felts, brushes) can be used, but this is usually not necessary. Small additive residues can also be "burned off" by corona treatment. Moreover, in many cases can be completely dispensed with a removal of additive residues. Suitable formulated conformal coatings can also adhere adequately to "additive-loaded" functional layers.
  • the first security element subelement, which has a functional layer with functional areas and recesses, and the second security element subelement, which has a functional layer essentially without recesses, are now joined with the aid of the resist layer located on the functional areas of the first security element subelement. the connected.
  • the second security element subelement is placed on the resist layer in such a way that its functional layer contacts the resist layer.
  • the two sub-elements are pressed together, optionally at elevated temperature, whereby the resist layer adheres to the functional layer of the second security element sub-element.
  • Suitable bonding conditions for thermoplastic resist coatings are typically about 60 ° C to 160 ° C and a line pressure of typically 0.1 N / mm to 15 N / mm, more preferably about 5 N / mm.
  • the carrier film of the second security element sub-element is peeled off, optionally together with intermediate layers between carrier film and functional layer, wherein the functional layer is peeled off in the non-bonded areas, while of course can not be deducted in the bonded areas, so that a layer structure with two to each other completely congruent patterns arises.
  • the blurs in the separation are less than 10 ⁇ .
  • the second motif layer may optionally be covered with a protective layer. So structures with a width of about 50 ⁇ or less congruent and sharp edges can be formed.
  • the layer structure thus obtained is, as explained below, on both sides, each with an optically active layer which forms a phase retardation layer for passing light equipped.
  • the absence of tack can be checked by the following test: Coated pieces of film of about 100 cm 2 are stacked and loaded with a weight of 10 kg and stored for 72 hours at 40 ° C. If the pieces of film can then be easily separated without damaging the coatings, the coating should be considered tack-free. Under increased pressure and increased temperature (about 100 ° C is 160 ° C) coated with the resist coatings substrates can be bonded to other substrates. According to the invention, the following resist coatings, in some cases tack-free resist coatings, may be used. The following formulas are to be considered as illustrative and not restrictive.
  • VMCH vinyl chloride copolymer with acid groups
  • VMCA vinyl chloride copolymer with acid groups
  • DOW 18% Plasticizer (eg phthalates, citric acid ester 1) ) 2%
  • Plasticizer eg phthalates, citric acid ester 1
  • VMCH vinyl chloride copolymer with acid groups
  • VYHH vinyl chloride copolymer, manufacturer: DOW 8.35%
  • Plasticizers eg phthalates, citric acid ester 1 ) 3.30%
  • MEK methyl ethyl ketone, 2-butanone 80.00% l
  • suitable plasticizers are: Citrofol B II (ATBC), Citrofol AH II (ATEHV), Citrofol BI (TBC) from Jungbunzlauer, Palatinol N from BASF.
  • the first security element partial element can be printed directly before bonding with a solvent, for example with cyclopentanone, or exposed to a solvent-containing atmosphere ,
  • the resist lacquer absorbs the solvent and becomes sticky or melts at low temperature than in the dry state.
  • the security element according to the invention which has two motif layers arranged on a carrier substrate, is equipped on both sides with a so-called "polarization feature". These are security features that use polarization effects for authenticity assurance.
  • the functional areas which form the surface on one side of the layer structure described above, for example metallized holograms, and the side opposite the functional areas of the carrier substrate are each fully or partially with an optically active layer, which forms a "phase retardation layer" for passing light, ie one Phase-retardation layers are capable of changing the polarization and phase of transmitted light, because the light is split into two mutually perpendicular directions of polarization, which pass through the layer at different speeds, their phases thus shifted from one another
  • the displacement varies in size and has different effects:
  • a ⁇ / 4 layer that is to say a layer which diffracts the light in one direction by a quarter wavelength from the one to the other delayed in the right direction, can make circularly polarized light circularly or elliptically polarized light and linearly polarized again from circularly polarized light.
  • phase delay layers is preferably formed from nematic liquid-crystalline material.
  • a security element that uses polarization effects for authenticity assurance is described, for example, in DE 10 2006 021 429 A1.
  • the phase-retarding layer portions of such a security element are hardly noticeable, but when viewed under polarized light, the phase-retardation-layer portions become recognizable. If light is incident on a light-reflecting surface, which is partially coated with polarizing material, through a polarizer, the light is reflected in the coated and in the uncoated regions with different polarization. When viewed through a polarizer observed by light / dark contrasts.
  • Suitable reflective layers are layers of metallizations, eg vapor-deposited metallizations, layers of metallic effect paints, layers with interference pigments or thin-film element layers.
  • High-index layers of, for example, TiO 2 or SiO 2 are also suitable as reflection layers.
  • metallic functional layers for example metallized diffraction structures
  • a polarization feature may, for example, be embodied as a ⁇ / 4-layer, applied in motif form, over the entire area or in regions, with only one orientation or with two or more different orientations.
  • the security element according to the invention which has two motif layers arranged on a carrier substrate, more precisely two reflective layers bonded with a resist, is provided on both sides with the same or different polarization characteristics.
  • the transparent areas (recesses) are not disturbing.
  • the carrier substrate should be isotropic or at least show no excessive dispersion in the optical range.
  • alignment layers of linear photopolymers, which can be patterned by exposure to polarized light, are known.
  • alignment layers for example, two alignment directions with photo-resolution can be predetermined by exposing the alignment layer in a first step through a mask with linearly polarized UV radiation.
  • the mask is removed and the previously unexposed areas are exposed with 90 ° rotated linearly polarized UV radiation. If nematic liquid crystals are applied to such an alignment layer (eg by evaporation or by gravure printing, screen printing, flexographic printing, knifecoating or curtain coating), then they respectively orient themselves to the local orientation of the alignment layer.
  • structured, in particular embossed, alignment layers which are subdivided into regions with different alignment directions, can also be provided in another way for aligning the phase-delay layers.
  • the embossed alignment layer has a diffractive structure. If nematic liquid crystals are applied to such an alignment layer, they are oriented in each case to the local orientation of the alignment layer, as in the case of the above-described photoalignment layer.
  • the motifs may also be formed by a partially different thickness of one or both of the phase delay layers.
  • the degree of phase rotation may be proportional to the layer thickness, so that the influence of the polarized light on the layer thickness can be adjusted specifically.
  • phase delay layers may also be present only in regions in the form of a motif. This design presents itself as Extreme case of the above-mentioned embodiment, when the recessed portions of the phase-delay layers are detected as layers with a layer thickness of zero.
  • the phase retardation layers are advantageously produced by means of a transfer material.
  • the transfer material comprises a layer sequence with a phase retardation layer partially applied to a carrier film (for example by intaglio, screen printing, flexographic printing, creasecoating or curtaincoating) and a transfer assist layer provided over the entire area, which is arranged directly above the phase retardation layer, and with an adhesive layer for transferring the layer sequence on the target substrate.
  • the transfer assist layer expediently has a greater adhesion to the partial layer than to the carrier film to be removed, so that the latter can be removed after transfer to the target substrate without damaging the phase delay layer.
  • a smooth film having good surface quality is preferably provided.
  • a film specially designed for the alignment of liquid crystals can be provided. the.
  • plastic film is films made of PET, OPP, BOPP, PE or cellulose acetate.
  • the carrier foil may also itself comprise a plurality of partial layers, for example the carrier foil may be provided with an alignment layer for the alignment of liquid crystals.
  • a transfer assist layer preferably a UV-curing lacquer layer is applied, in particular printed.
  • the UV-curable lacquer layer expediently contains photoinitiators, it being necessary to search for a sufficiently high adhesion of the transfer assist layer to the layer to be transferred and sufficiently low adhesion to the substrate to be removed in order to select the optimal photoinitiator.
  • the security elements can also have negative information in the form of patterns, characters or codes that are formed by recesses in one or both optically active layers.
  • the functional layers which have to be separated in areas remaining on the resist layer on the one hand and in areas to be subtracted with the carrier substrate on the other hand may not have too high internal strength in the horizontal direction (in the direction of extension of the resist layer) to ensure a clean and sharp separation.
  • Functional layers whose internal strength is undesirably high are preferably applied in a screened manner.
  • the edge of each halftone dot represents a predetermined breaking point, whereby the transfer to the resist layer in this case comprises a halftone dot as the smallest unit.
  • the security elements have three different views to be perceived by the viewer: a front view in reflected light (front incident light view), a rear view in reflected light (rear side illumination view) and a view in transparency (transmitted light view).
  • These different views can be achieved by equipping the functional areas of the first security element partial element and of the second security element partial element in each case with motifs which can only be perceived from one side (front side or rear side) and also the functional areas, d. H. their areal extent, so varied that the surface variation, another pattern, a so-called sub-pattern is formed.
  • the pattern perceived in front and back views may be formed by straight or curved, parallel or intersecting lines of a certain width with recesses therebetween.
  • This pattern may additionally be a support for a motif which is primarily perceived by the observer in the form of a view, for example a first hologram visible in front elevational view and a second hologram different therefrom, which is perceived in rear elevational view.
  • a motif which is primarily perceived by the observer in the form of a view, for example a first hologram visible in front elevational view and a second hologram different therefrom, which is perceived in rear elevational view.
  • Such an effect can be achieved if the lines are formed by first and second functional areas. those that consist of metallizations with different holographic information.
  • the lines are made wider in places.
  • the larger line width is not noticeable in supervision, but in transmitted light, when the motif information, such as the holograms, is no longer perceptible to the viewer, the areal extent of the lines becomes the only recognizable information, and deviations in the line width become sub-patterns perceived.
  • This modulation of line-like features is known for the generation of halftone images.
  • WO 2004/020217 A1 the disclosure content of which is the subject of the present application.
  • the patterns of the functional layers can be formed from linear structural elements, as disclosed in WO 2004/020217 Al.
  • the present invention is by no means limited to the illustrated functional layers, their particular spatial arrangement and sequence.
  • the layers can each be present over the entire surface or in subregions of the security elements.
  • further layers may be contained in the security element constructions, for example protective layers or release layers in the case of transfer elements, adhesion-reducing layers for facilitated separation of the functional layer regions which are used on the security layer Resist layer should remain etc .. It is understood that the additional layers must not interfere with the process flow.
  • the representations are not are true to scale. In particular, the individual layers are shown greatly exaggerated.
  • FIG. 1 shows a security element according to the invention in a transparent view
  • Fig. 1 shows an inventive security element 1 in a view in transmitted light.
  • the security element 1 has inter alia the following layers: a transparent substrate 11, a first and a second functional layer (motif layers), and a resist layer which glues the first and the second functional layer.
  • the two motif layers have the same size and shape in the exemplary embodiment and only partially cover the carrier substrate 11.
  • the motif layers may be the carrier substrate also cover the entire surface. Additionally, one of the motif layers may only partially cover or partially overlap the other motif layer.
  • the two motif layers form a triangular pattern 7 of lines 4, the lines 4 being formed from the functional regions of the functional layers (motif layers) bonded by means of resist.
  • the lines 4 are separated by recesses 3, wherein the recesses 3 are formed by the congruent recesses in the functional areas and the resist layer.
  • the lines 4 vary in their width y, whereby a sub-pattern 7 'becomes perceptible when viewed through the security element, in the embodiment shown another triangle.
  • FIG. 2 illustrates the process sequence in the production of a layer structure which serves as a precursor for the security element 1 according to the invention. Shown is a section along the line A-A 'of the security element shown in Fig. 1, but again to emphasize that the sequence of layers is merely exemplary.
  • FIG. 2a shows a first security element partial element 10, consisting of a first carrier substrate 11, for example a film of PET, an embossing lacquer layer 15 applied thereto with embossed diffraction structure 15 'with a gold-colored metallization.
  • the metallization forms a first te functional layer 12, on which in turn a layer 30 of thermoplastic resist in the form of a pattern with resist areas 33 and recesses 34 is printed therebetween.
  • the diffraction structure 15 ' continues in the functional layer as a diffraction structure 12'.
  • Fig. 2b shows the same view as Fig. 2a, but after treatment with an etchant.
  • the regions of the first functional layer 12 not protected by resist regions 33 were removed, while the regions of the first functional layer 12 protected by resist regions 33 were retained and form the first functional regions 13.
  • the first functional areas 13 represent an exact reproduction of the pattern of the resist areas 33.
  • the second security element subelement 20 consists of the second carrier substrate 21, the second functional layer 22 and an embossing lacquer layer 25 therebetween.
  • embossing lacquer layer 25 a diffraction structure 25 'is impressed, which continues in the second functional layer 22 as a diffraction structure 22'.
  • the second functional layer 22 is a silver-colored metallization.
  • the embossing lacquer 25 was washed off with an aqueous surfactant solution before the application of the metallization 22, with the result that the metallization 22 badly adheres to the embossing lacquer.
  • FIG. 2d shows how the first security element partial element 10 from FIG. 2b and the second security element partial element 20 from FIG. 2c are assembled into a composite 5.
  • the two sub-elements are pressed together, whereby the diffraction structure 22 'of the second functional layer 22 transmits into the resist areas 33, since the resist used is a deformable, preferably thermoplastic resist.
  • the resist areas 33 By means of the resist areas 33, the first security element partial element and the second security element partial element are glued together.
  • bonding is advantageously carried out at elevated temperature.
  • the pressing together of the two security elements sub-elements can take place in one or more stages, ie the two sub-elements are preferably pressed together at elevated temperature in a heating roller with one (single-stage compression) or several so-called calender rolls (multi-stage compression), or else the two parts. Elements are pressed against one another at several heating rollers, each of which is equipped with one or more so-called calender rollers (multi-stage compression).
  • the multi-stage compression can, depending on the particular embodiment, lead to a particularly strong connection of the safety element sub-elements. When using several heating rollers and temperature profiles during compression can be realized.
  • the second carrier substrate 21 and the second embossing lacquer layer 25 are peeled off, for example by a separating winding.
  • the result is shown in Fig. 2e. Only the regions 23 of the second functional layer 22, which were in contact with resist regions 33, were bonded to the first security element partial element 10. These areas form the second functional areas 23, the one represent exact reproduction of the pattern of the resist areas 33.
  • the remaining regions of the second functional layer 22 were removed together with the second carrier substrate and the embossing lacquer layer, while the regions 23 of the second functional layer 22 bonded to the resist regions 33 were pulled off the embossing lacquer layer.
  • the regions 13, 33 and 23 are each exactly congruent and in the illustration of FIG. 1 form the lines 4.
  • the recesses 3 between the lines 4 are also exactly congruent and are formed by the recesses 14 in the first functional layer 12, the Recesses 34 formed in the resist layer 30 and the recesses 24 in the second functional layer 22.
  • the lines 4 (which are formed by the first functional regions 13, the resist regions 33 and the second functional regions 23) are in each case carriers of a diffraction structure in the layer structure illustrated in FIG. 2e.
  • the diffraction structures may, for example, be hologram structures, with different hologram structures preferably being present in the first functional areas 13 and the second functional areas 23.
  • an observer of the security elements according to the invention shown in FIG. 3 and FIG. 4a in the transmitted-light view recognizes the line pattern shown in FIG. Specifically, in the front-side reflected light view, when viewing the side of the first supporting substrate 11 as the front side, the viewer recognizes the hologram of the first functional layer 12, and in the rear-side incident light view, the hologram of the second functional layer 22.
  • a hot stamping foil can be used as a second security element sub-element.
  • a hot stamping foil can be used in this case, in the case of the separation Only the second carrier substrate 21 are peeled off, while the embossing lacquer layer 25 would remain on the formed security element 1.
  • It can also serve as a protective layer.
  • the provision of a protective layer (not shown in the figure) over the second functional area or the second functional layer is expedient, in particular, therefore, z.
  • the diffraction structure 22 'shown in FIG. 2e or the impression of the diffraction structure 25' in the functional layer 22 are covered and thus are not accessible to counterfeiting attacks.
  • Fig. 3 shows the layer structure of a security element according to the invention according to an embodiment.
  • the precursor layer structure of FIG. 2e is provided with a first alignment layer 51, for example a photoalignment layer, a first phase retardation layer 52 of a nematic liquid crystal material, and a second alignment layer 61, for example a photoalignment layer, and a second retardation layer 62 of a nematic liquid crystal material.
  • a first alignment layer 51 for example a photoalignment layer
  • a first phase retardation layer 52 of a nematic liquid crystal material for example a photoalignment layer
  • a second alignment layer 61 for example a photoalignment layer
  • a second retardation layer 62 of a nematic liquid crystal material for example a photoalignment layer
  • the two phase delay layers 52 and 62 are each given a motif which is produced on the second functional layer 22 is a photostructurable layer 51 of polyvinyl cinnamate or polyimide which can be patterned by exposure to polarized light in accordance with a first desired motif ,
  • a nematic liquid crystal layer 52 is then applied, which is oriented in the areas 52-1 and 52-2, respectively, in accordance with the respective orientation predetermined by the layer 51.
  • the layer 51 acts as an alignment layer for the nematic liquid crystal layer 52, so that the imprinted motif of the photoacoustic alignment layer 51 continues into the liquid crystal layer 52.
  • a photostructurable layer 61 of polyvinylminnamate or polyimide is applied to the carrier substrate 11, which can be patterned by exposure to polarized light in accordance with a second desired motif.
  • a nematic liquid crystal layer 62 is then applied, which is oriented in the regions 62-1 or 62-2 in accordance with the orientation predetermined by the layer 61 in each case.
  • the layer 61 acts as an alignment layer for the nematic liquid crystal layer 62, so that the imprinted motif of the photoalignment layer 61 continues into the liquid crystal layer 62.
  • the security element 1 shown in FIG. 3 is viewed in a plan view of the phase retardation layer 52 or in a plan view of the phase retardation layer 62 by a suitably superimposed linear polarization filter, then the motif of the retardation layer 52 or the motif of the retardation layer 62 emerges with clear contrast.
  • the contrast is due to the fact that the reflective metallizations 22 and the reflective metallizations 12 appear in different brightness levels.
  • a viewer or a machine recording system can thus perceive the motif of the first phase retardation layer 52 formed by the areas 52-1 and 52-2 with high contrast, while the motif of the opposite phase retardation layer 62 does not appear when viewing the front side.
  • the motif appears as a negative image during a rotation of the linear polarizing filter (for example by 90 °, if the phase retardation layer is a ⁇ / 4 layer due to its layer thickness).
  • a viewer or a machine recording system may perceive the scene formed by the areas 62-1 and 62-2 of the second high-contrast phase retardation layer 62 while the subject of the opposite retardation layer 52 does not appear when viewing the front side.
  • the motif appears as a negative image during a rotation of the linear polarizing filter (for example by 90 °, if the phase retardation layer is a ⁇ / 4 layer due to its layer thickness).
  • a layer 72 of nematic liquid-crystalline material is partially printed on a smooth plastic film 73 of good surface quality in the form of a first desired motif.
  • a transfer assist layer 71 is printed over its entire surface, the adhesion to the plastic film 73 is less than the Nematen für 72 and the subsequent transfer of the only partially present Nematen für 72 is used.
  • this transfer assist layer 71 can be, for example, a UV-crosslinkable lacquer layer.
  • a second Schichrverbund 80 is prepared by a layer 82 of nematic liquid crystalline material partially on a smooth plastic film 83 good surface quality in the form of a second desired Mo- is printed on. Also on the Nematen für 82 and the plastic film 83 a transfer surface 81 is printed over its entire surface, the adhesion to the plastic film 83 is lower than the Nematen für 82. Then, the first and second layer composite 70 and 80 on the Obertial. Laminated on the lower side of the layer structure of FIG. 2e, as indicated by the arrows 101 and 102. The lamination can preferably take place via an adhesive layer.
  • the two layer composites 70 and 80 may additionally be provided with adhesion promoters in order to improve the laminating resistance with the laminating adhesive. Subsequently, the carrier sheets 73 and 83 are removed by separating coils to form the layer structure shown in Fig. 4 (a).
  • phase retardation layers 72 and 82 are now not printed over the entire surface, but only partially printed, the shape and arrangement of the printed areas 72 and 82 two independent motifs in the form of patterns, characters or Form codes that serve to verify the security element from opposite sides.
  • the motives of the phase retardation layers 72 and 82 are not apparent to the viewer.
  • the security element is viewed in plan view by a suitably superimposed linear polarization filter, for example from the side of the phase retardation layer 72, the reflective metallizations 22 will appear differently bright, depending on whether a printed area 72 is present above the metallization.
  • the method according to the invention allows a register-accurate and sharp-edged formation of very fine structures with a width or a diameter of about 50 ⁇ m or less.
  • the present invention has always been described in the context of a transparent or translucent first carrier substrate.
  • an opaque first carrier substrate it is also possible to use an opaque first carrier substrate, as a result of which, however, the negative writing becomes poorly recognizable, and only one of the two reflected light views is easily recognizable.
  • An opaque carrier substrate 11 is therefore less preferred.
  • the formation of recesses 14 in the first functional layer 12 can be dispensed with, ie the first security element partial element 10 can be glued to the second security element partial element 20 in the form shown for example in FIG.
  • the pattern of the resist layer 30 is reproduced exactly only in the second functional layer 22, which, however, can also lead to very satisfactory results with clearly visible negative writing, for example if the first functional layer 12 is formed as a transparent color.
  • a first security element partial element 10 with congruent first functional areas 13 and resist areas 33 can be glued to a second security element partial element 20 whose second functional layer 22 already has a pattern but which does not match the pattern of the first functional layer 13 and the sist Schemee 33 matches.
  • the first functional areas 13 and the resist areas 33 form a line pattern as in FIG.
  • first functional layer 12 is printed with a resist layer 30 in the form of parallel straight lines 33.
  • a second security element partial element 20 is adhesively bonded thereto, in the second functional layer 22 of which a pattern of functional regions 23 in the form of likewise parallel straight lines is formed which form an angle with the resist region lines 33.
  • the second functional areas 23 stick together with the first security element partial element 10 in the areas in which they come to lie over resist areas 33.
  • All security elements according to the invention have, inter alia, in common that two of their functional layers are bonded directly to one another by means of a resist, wherein at least the pattern of one functional layer, preferably also the pattern of the other functional layer, is at least partly due to the pattern of the resist layer.
  • the security elements according to the invention can be provided in the form of transfer materials, ie films or tapes having a multiplicity of finished security elements prepared for the transfer.
  • the layer structure of the later security element is prepared on a carrier material in the reverse order in which the layer structure is later to be stored on a valuable object, wherein the layer structure of the security element in continuous form or already in the final outline form used as security element on the Carrier material can be prepared.
  • a hot melt adhesive is used for this purpose.
  • an adhesive layer can be provided for transfer either only in the areas of the security element to be transferred, or the adhesive is activated only in the areas to be transferred.
  • the carrier material of the transfer elements is usually deducted from the layer structure of the security elements during or after their transfer to the valuable article.
  • a separating layer release layer
  • the carrier material can also remain on the transmitted security element.
  • the security elements according to the invention can be used to authenticate goods of any kind. Preferably, they are used to authenticate value documents, for example banknotes, checks or identity cards.
  • the security elements according to the invention can be arranged on a surface of the value document or be completely or partially embedded in the value document. With particular advantage they are used in value documents hole hole hole.
  • the advantages of the security elements according to the invention with transparent carrier substrates and from both sides of the value document to be considered, carefully matched motifs, can be particularly beautiful. Even negatives with the finest structures and sub-patterns can be clearly recognized in transmitted light. You are in the achievable according to the invention precision of a counterfeiter practically imitated.
  • a detachment of the security elements in order to transfer them to another valuable item is practically not possible, because the security elements of the invention always contain at least two adhesive layers, ie they contain an adhesive resist layer and are connected with an adhesive layer with the valuable object to be secured. If, for the bonding of the security element to the object of value, an adhesive which is similar in terms of its chemical and physical properties to the resist in the layer structure of the security element, the layer structure of the security element is always destroyed during detachment attempts.

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  • Engineering & Computer Science (AREA)
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  • Business, Economics & Management (AREA)
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Abstract

La présente invention concerne un procédé pour fabriquer un élément de sécurité (1), un élément de sécurité (1) obtenu selon le procédé conforme à l'invention, des matériaux de transfert comprenant les éléments de sécurité conformes à l'invention et les objets de valeur sécurisés avec les éléments de sécurité selon l'invention. L'élément de sécurité (1) selon l'invention a deux couches (12, 22) réfléchissantes, qui sont collées l'une avec l'autre au moyen d'une couche resist (30), et deux couches optiquement actives (52, 62 ; 72, 82), qui sont disposées des deux côtés de l'élément de sécurité. La couche resist (30) présente un motif qui est utilisé pour générer un motif coïncidant dans la première couche réfléchissante (12). Ensuite, le motif de la couche resist (30), et donc également de la seconde couche réfléchissante (12), est reproduit de façon précise dans la seconde couche réfléchissante (22). On y arrive par le fait que la seconde couche réfléchissante (22) est collée sous la forme du motif de la couche resist (30). Les zones non collées de la seconde couche réfléchissante (22) sont enlevées, de sorte qu'on obtient une écriture négative.
PCT/EP2010/006819 2009-11-11 2010-11-09 Procédé pour fabriquer un élément de sécurité avec des métallisations adaptées et élément de sécurité obtenu avec ce procédé WO2011057759A1 (fr)

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DE102009052792A DE102009052792A1 (de) 2009-11-11 2009-11-11 Verfahren zur Herstellung eines Sicherheitselements mit gepasserten Metallisierungen und daraus erhältliches Sicherheitselement
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9724955B2 (en) 2013-02-01 2017-08-08 De La Rue International Limited Security devices and methods of manufacture thereof
US9902187B2 (en) 2013-02-01 2018-02-27 De La Rue International Limited Security devices and methods of manufacture thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012014294A1 (de) * 2012-07-19 2014-01-23 Giesecke & Devrient Gmbh Verfahren zur Herstellung eines mehrschichtigen Sicherheitselements
DE102014001688A1 (de) * 2014-02-07 2015-08-13 Giesecke & Devrient Gmbh Herstellung eines Sicherheitselements mit Farbänderungseigenschaften

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992011142A1 (fr) 1990-12-20 1992-07-09 Gao Gesellschaft Fúr Automation Und Organisation Mbh Fil de securite metallique magnetique avec une ecriture negative
EP1327895A1 (fr) * 2000-10-19 2003-07-16 NHK Spring Co., Ltd. Support d'identification d'une matiere a identifier et procede de production correspondant
WO2004020217A1 (fr) 2002-08-09 2004-03-11 Giesecke & Devrient Gmbh Support de donnees
WO2005108108A2 (fr) * 2004-04-30 2005-11-17 Giesecke & Devrient Gmbh Element de securite et son procede de production
DE102004035979A1 (de) 2004-07-14 2006-02-02 Giesecke & Devrient Gmbh Sicherheitselement und Verfahren zu seiner Herstellung
DE102005052928A1 (de) * 2005-11-03 2007-05-16 Giesecke & Devrient Gmbh Durchsichtssicherheitselement und Verfahren zu seiner Herstellung
WO2007107235A1 (fr) 2006-03-17 2007-09-27 Giesecke & Devrient Gmbh Image tramée
DE102006021429A1 (de) 2006-05-05 2007-11-08 Giesecke & Devrient Gmbh Prüfmittel für die Echtheitsprüfung eines Prüfobjekts
DE102007055112A1 (de) 2007-01-05 2008-07-10 Giesecke & Devrient Gmbh Verfahren zur Herstellung von Sicherheitsfolien
DE102008006533A1 (de) * 2008-01-29 2009-07-30 Giesecke & Devrient Gmbh Sicherheitselement mit Polarisationsmerkmal

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992011142A1 (fr) 1990-12-20 1992-07-09 Gao Gesellschaft Fúr Automation Und Organisation Mbh Fil de securite metallique magnetique avec une ecriture negative
EP1327895A1 (fr) * 2000-10-19 2003-07-16 NHK Spring Co., Ltd. Support d'identification d'une matiere a identifier et procede de production correspondant
WO2004020217A1 (fr) 2002-08-09 2004-03-11 Giesecke & Devrient Gmbh Support de donnees
WO2005108108A2 (fr) * 2004-04-30 2005-11-17 Giesecke & Devrient Gmbh Element de securite et son procede de production
DE102004035979A1 (de) 2004-07-14 2006-02-02 Giesecke & Devrient Gmbh Sicherheitselement und Verfahren zu seiner Herstellung
DE102005052928A1 (de) * 2005-11-03 2007-05-16 Giesecke & Devrient Gmbh Durchsichtssicherheitselement und Verfahren zu seiner Herstellung
WO2007107235A1 (fr) 2006-03-17 2007-09-27 Giesecke & Devrient Gmbh Image tramée
DE102006021429A1 (de) 2006-05-05 2007-11-08 Giesecke & Devrient Gmbh Prüfmittel für die Echtheitsprüfung eines Prüfobjekts
DE102007055112A1 (de) 2007-01-05 2008-07-10 Giesecke & Devrient Gmbh Verfahren zur Herstellung von Sicherheitsfolien
DE102008006533A1 (de) * 2008-01-29 2009-07-30 Giesecke & Devrient Gmbh Sicherheitselement mit Polarisationsmerkmal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9724955B2 (en) 2013-02-01 2017-08-08 De La Rue International Limited Security devices and methods of manufacture thereof
US9902187B2 (en) 2013-02-01 2018-02-27 De La Rue International Limited Security devices and methods of manufacture thereof

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EP2498998B1 (fr) 2015-02-25
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