EP2498998B1 - 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
EP2498998B1
EP2498998B1 EP10778569.3A EP10778569A EP2498998B1 EP 2498998 B1 EP2498998 B1 EP 2498998B1 EP 10778569 A EP10778569 A EP 10778569A EP 2498998 B1 EP2498998 B1 EP 2498998B1
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EP
European Patent Office
Prior art keywords
layer
resist
regions
security element
security
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.)
Not-in-force
Application number
EP10778569.3A
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German (de)
English (en)
Other versions
EP2498998A1 (fr
Inventor
Winfried HOFFMÜLLER
Theodor Burchard
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Giesecke and Devrient GmbH
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Giesecke and Devrient GmbH
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Publication of EP2498998A1 publication Critical patent/EP2498998A1/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
    • 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
    • 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 documents of value such as banknotes, shares, identity cards, credit cards, certificates, checks, and other forgery-prone papers, such as identity documents of various kinds, but also branded goods and packaging of branded goods are often equipped 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, d. H. within a layer, there are functional areas with the detectable property (eg, luminescence) and recesses therebetween. If a plurality of functional layers are arranged one above the other, it is generally desirable for the functional areas and the recesses in the individual functional layers to be exactly in register, that is to say in the individual functional layers. H.
  • 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" 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 fonts 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, ie congruent, formation of a negative writing 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 constituent that causes a process when irradiated or heated or in contact with a washing liquid, the As a result, the ink exerts a force on the overlying coating which causes the coating to break.
  • This force can be exerted by a gas generated from constituents of the printing ink when they come into contact with washing liquid, irradiated and / or heated, or by a swelling agent in the printing 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.
  • the objects are achieved by the method for producing a security element having the features specified in claim 1, by the security element having the features specified in claim 5, by the transfer material having the features specified in claim 9, by the security paper or the valuable article according to claim 10 and by the method according to claim 11.
  • 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 takes place only in the areas in which the second functional layer has 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 equipped on both sides with an optically active layer which forms a phase delay 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, wherein the security elements according to the invention are nevertheless characterized by a very high security against counterfeiting.
  • the functional layer is first formed on the carrier substrate.
  • 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, TiO 2 or SiO 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.
  • PVD physical vapor deposition
  • the application can be made over the entire area or only in partial areas.
  • 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.
  • an embossing lacquer layer containing the desired structure information is to be provided.
  • 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 in, for example DE 10 2004 035 979 A1 , which discloses heat sealing lacquers which can be used equally as 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 e.g. different 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.
  • suitable printing methods are known.
  • the functional layer of the first security element partial element ie the first functional layer
  • the functional layer of the first security element partial element is patterned, ie the pattern of the resist layer is transferred into the first functional layer.
  • the transfer 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, in the case of printing inks, for example by washing out with suitable solvents. Suitable methods are known to the person skilled in the art.
  • the first security element subelement now has a pattern that 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 subelement has, like the first security element subelement, 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 recesses are only produced by cooperation with the first security element subelement or the resist layer thereon.
  • 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. peeled off by separation winding (eg, the parts of the functional layer, which are arranged in the composite security element via recesses in the functional layer of the first security element subelement), while the carrier substrate of other parts of the functional layer of the second security element sub-element (z B. the parts that are arranged in the composite security element over functional areas of the first security element sub-element, must be replaced. Therefore, it is necessary the functional layer has only a slight adhesion to the carrier substrate.
  • the required low adhesion force is already achieved in many functional layer materials, in particular metallizations, by omitting adhesion-promoting measures between the carrier substrate and the functional layer.
  • adhesion-promoting measures between the individual layers of a security element is otherwise customary, and the corresponding provisions are known to a person skilled in the art.
  • 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 away" by means of a 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 partial element which has a functional layer with functional areas and recesses
  • the second security element partial element which has a functional layer essentially without recesses
  • the resist layer located on the functional areas of the first security element partial element connected.
  • the second security element sub-element is placed so 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 microns.
  • the second motif layer may optionally be covered with a protective layer.
  • structures with a width of about 50 microns 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 film pieces can then easily be separated from one another without damaging the coatings, the coating must be considered tack-free. Under elevated pressure and elevated 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.
  • 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 picks up the solvent and becomes sticky or melts at low temperature than when dry.
  • a solvent for example with cyclopentanone
  • 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 birefringent layer, coated.
  • Phase retardation layers are capable of changing the polarization and phase of transmitted light. The reason is that the light is split into two mutually perpendicular polarization directions, which pass through the layer at different speeds, their phases are thus shifted from each other.
  • a ⁇ / 4 layer that is, a layer that delays the light in a direction one-quarter wavelength from the direction perpendicular thereto, can make circularly or elliptically polarized light from linearly polarized light and linearly polarize again from circularly polarized light.
  • the phenomenon of polarization and polarizing materials are known.
  • one or both of the phase delay layers is preferably formed from nematic liquid-crystalline material.
  • phase-retarding layer portions of such a security element When viewed under ambient light, 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.
  • 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.
  • the light-reflecting surface does not change the polarization state of the incident light uncontrollably.
  • 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 vapor deposition 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, as in the case of the above-described photoalignment layer, respectively at the local alignment of the alignment 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 aforementioned embodiment, when the recessed portions of the phase delay layers are considered as layers with a layer thickness of zero.
  • phase retardation layers are to be present only partially, they 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, flexo printing, edgecoating or curtaincoating) and a transfer assist layer provided over the entire area directly above the phase retardation layer and with an adhesive layer for transferring the layer sequence onto the film 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.
  • plastic film is films made of PET, OPP, BOPP, PE or cellulose acetate.
  • the carrier film may also itself comprise a plurality of sub-layers, for example, the carrier film 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 choose a balance between 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 optimum 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 regions 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 transfer of the grid must be repeated with a further second security element sub-element (another donor film) in order to cover the resist completely substantially with the second functional layer.
  • the security elements have three different views to be perceived by the viewer: a front view in reflected light (front side incident view), a rear view in incident light (rear side view) and a view in transparency (transmitted light view).
  • These different views can be achieved by providing the functional areas of the first security element partial element and the second security element partial element respectively with motifs which can only be perceived from one side (front side or rear side) and also the functional areas, ie. 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.
  • 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. It is referred to in this regard WO 2004/020217 A1 , the disclosure of which is the subject of the present application.
  • the patterns of the functional layers can be made of linear structural elements as shown in FIG WO 2004/020217 A1 disclosed are formed.
  • 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 structures, for example protective layers or release layers in the case of transfer elements, adhesion-reducing layers for facilitating separation of the functional layer areas which are to remain on the resist layer, etc ..
  • the additional layers must not interfere with the procedure.
  • the representations are not are true to scale. In particular, the individual layers are shown greatly exaggerated.
  • 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 areas 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 flow 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 AA 'of in Fig. 1 illustrated security elements, 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 an impressed diffraction structure 15 'with a gold-colored metallization.
  • the metallization forms a first 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 representation 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.
  • Fig. 2c 2 shows a section through the second security element subelement 20 to be combined with the first security element subelement 10.
  • 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 subelement 10 Fig. 2b and the second security element subelement 20 Fig. 2c be 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 used is a deformable, preferably thermoplastic resist.
  • 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 compression of the two security elements sub-elements can take place in one or more stages, i. the two sub-elements are preferably pressed together at elevated temperature in a heat roller with a (single-stage compression) or more so-called calender rolls (multi-stage compression), or but the two sub-elements are pressed against each other at several heat rollers, each equipped with one or more so-called calender rolls ( 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 in Fig. 2e shown. 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 peeled off 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 areas 13, 33 and 23 are each exactly congruent and form in the representation of Fig. 1 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 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 shown in FIG Fig. 2e Layer structure shown each carrier of a diffraction structure.
  • 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.
  • a viewer recognizes the in Fig. 3 and Fig. 4a shown security elements according to the invention in the transmitted light view in Fig. 1 shown line pattern.
  • 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 would be at the isolation winding only the second carrier substrate 21 are removed, while the embossing lacquer layer 25 would remain on the formed security element 1.
  • It can also serve as a protective layer.
  • a protective layer (not shown in the figure) on the second functional areas or the second functional layer is useful, in particular therefore z.
  • B. the in Fig. 2e As shown diffraction structure 22 'and the impression of the diffraction structure 25' covered in the functional layer 22 and thus is not accessible to counterfeiting attacks.
  • Fig. 3 shows the layer structure of a security element according to the invention according to an embodiment.
  • the serving as a precursor layer structure of Fig. 2e receives 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 photoalignment layer 51 continues into the liquid crystal layer 52.
  • a photostructurable layer 61 of polyvinyl cinnamate or polyimide is applied to the carrier substrate 11, which can be patterned by exposure to polarized light according to a second desired motif.
  • a nematic liquid crystal layer 62 is then applied, which is oriented in the areas 62-1 and 62-2, respectively, in accordance with the respective orientation predetermined by the layer 61.
  • 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 motif of the retardation layer 52 or the motif of the retardation layer 62 emerges with distinct 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 subject appears as a negative image upon rotation of the linear polarizing filter (e.g., 90 ° when the phase retardation layer is ⁇ / 4 due to its layer thickness).
  • FIG Fig. 4 explains Fig. 4 (a) the finished security element 1 and Fig. 4 (b) the separately produced layers or layer composites before laminating schematically shows.
  • 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 layer composite 80 is produced by applying a layer 82 of nematic liquid-crystalline material partially to a smooth plastic film 83 of good surface quality, in the form of a second desired motif is printed. Also on the Nematen für 82 and the plastic film 83, a transfer assist layer 81 is printed over the entire surface, the adhesion to the plastic film 83 is lower than the Nematen für 82nd
  • 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.
  • the carrier films 73 and 83 are removed by separating coils, so that the in Fig. 4 (a) shown layer structure arises.
  • phase delay 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 encodings, the verification of the security element from opposite sides serve.
  • 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 edge-sharp 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 first security element sub-element 10 so in the example in Fig. 2a shown form are glued to the second security element sub-element 20.
  • the pattern of the resist layer 30 is accurately reproduced only in the second functional layer 22, which, however, can also give very satisfactory results with highly visible negative writing, for example, when 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 resist regions 33 matches.
  • the first functional areas 13 and the resist areas 33 are a line pattern as in FIG Fig. 1 forming a bond with a second functional layer 22 having a perpendicular line pattern of parallel lines, this results in a security element 1 with punctiform second functional areas 23.
  • the second functional areas 23 are then like pearls on a string on the through the first functional areas lines "strung". In supervision of the second functional areas, the viewer recognizes lines with dots.
  • first functional layer 12 has functional regions 13 in the form of circular concentric lines.
  • the 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 glued thereon, in the second functional layer 22 of which a pattern of functional areas 23 in the form of likewise parallel straight lines is formed, which form an angle with the resist area 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.
  • an observer then, after separating the second carrier substrate 21, sees the circular pattern of the first functional layer with punctiform regions formed by the second functional layer. If a colored resist is used, the resist lines 33 are additionally recognizable.
  • 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.
  • they are used to authenticate value documents, for example banknotes, checks or identity cards.
  • they can be arranged on a surface of the value document or be completely or partially embedded in the value document.
  • 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.
  • the security elements of the invention always contain at least two layers of adhesive, d. H. they contain an adhesive resist layer and are bonded with an adhesive layer to 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.

Claims (11)

  1. Procédé de fabrication d'un élément de sécurité (1) comprenant une écriture en négatif (3) pour un papier de sécurité ou un objet de valeur, notamment un document de valeur, comportant les étapes suivantes:
    a) Fabrication d'un premier élément partiel (10) d'élément de sécurité par
    • mise à disposition d'un premier substrat porteur (11) transparent ou translucide,
    • application d'une première couche de vernis de gaufrage (15) en tant que couche intermédiaire sur le premier substrat porteur (11),
    • application d'une première couche réfléchissante (12) sur la première couche de vernis de gaufrage (15),
    • gaufrage de la première couche de vernis de gaufrage (15) avant ou après l'application de la première couche réfléchissante (12),
    • application d'une couche de résist (30) sur la première couche réfléchissante (12) sous forme d'un motif prédéterminé (7) ayant des zones de résist (33) et des évidements (34) entre les zones de résist,
    • enlèvement des zones de la première couche réfléchissante (12) non protégées par des zones de résist (33) afin de constituer des premières zones réfléchissantes (13) et des premiers évidements (14) entre elles,
    caractérisé en ce que le procédé comporte en outre les étapes suivantes:
    b) Fabrication d'un deuxième élément partiel (20) d'élément de sécurité par
    • mise à disposition d'un deuxième substrat porteur (21),
    • application d'une deuxième couche de vernis de gaufrage (25) en tant que couche intermédiaire sur le deuxième substrat porteur (21),
    • application d'une deuxième couche réfléchissante (22) sur la deuxième couche de vernis de gaufrage (25),
    • gaufrage de la deuxième couche de vernis de gaufrage (25) avant ou après l'application de la deuxième couche réfléchissante (22),
    c) Jonction du premier (10) et du deuxième (20) élément partiel d'élément de sécurité de manière à obtenir un composite (5) de telle manière que la couche de résist (30) et la deuxième couche réfléchissante (22) se font face, et collage du premier (10) et du deuxième (20) élément partiel d'élément de sécurité, de préférence sous pression élevée et à température élevée, et
    d) Détachement du deuxième substrat porteur (21) du composite (5) collé, la deuxième couche réfléchissante (22) adhérant aux zones de résist (33) en formant des deuxièmes zones réfléchissantes (23), tandis que les autres zones de la deuxième couche réfléchissante (22) sont détachées conjointement avec le deuxième substrat porteur (21), ce par quoi, dans la deuxième couche réfléchissante (22), des deuxièmes évidements (24) sont formés et, conjointement avec les évidements (34) dans la couche de résist (30) et le cas échéant avec les premiers évidements (14) dans la première couche réfléchissante (12), constituent l'écriture en négatif (3),
    e) Agencement d'une première couche optiquement active (52; 72), constituant pour de la lumière traversante une couche de retard de phase, au-dessus des deuxièmes zones réfléchissantes (23), et agencement d'une deuxième couche optiquement active (62; 82), constituant pour de la lumière traversante une couche de retard de phase, au-dessus du côté du premier substrat porteur (11) opposé à la première couche optiquement active (52; 72).
  2. Procédé selon la revendication 1, caractérisé en ce que les zones de résist (33) sont formées sous forme de lignes (4) d'une largeur définie y.
  3. Procédé selon une des revendications 1 ou 2, caractérisé en ce que la couche de résist (30) est appliquée en tant qu'un motif (7), ce qui a lieu en ce que les zones de résist (33) et les évidements (34) constituent en plus un sous-motif (7').
  4. Procédé selon la revendication 3, caractérisé en ce que le sous-motif (7') est généré par variation de la largeur y des lignes (4).
  5. Elément de sécurité (1) comprenant une écriture en négatif (3) pour agencement sur ou au moins insertion partielle dans un papier de sécurité ou un objet de valeur, notamment un document de valeur, qui peut être obtenu suivant un procédé selon une des revendications de 1 à 4 et consiste en plusieurs couches qui s'étendent respectivement sur l'ensemble de l'élément de sécurité (1) ou sur des zones partielles de l'élément de sécurité, les couches comportant au moins celles qui suivent:
    • un substrat porteur (11) transparent ou translucide,
    • une couche de résist (30) ayant des zones de résist (33) et des évidements (34) qui constituent un motif prédéterminé (7),
    • une première couche réfléchissante (12), le cas échéant avec des premières zones réfléchissantes (13) et des premiers évidements (14) qui constituent un motif dû le cas échéant au motif (7) de la couche de résist (30),
    caractérisé en ce que les couches comportent en outre les suivantes:
    • une deuxième couche réfléchissante (22) ayant des deuxièmes zones réfléchissantes (23) et des deuxièmes évidements (24) qui constituent un motif dû au moins partiellement au motif (7) de la couche de résist (30),
    • une première couche optiquement active (52; 72), constituant pour de la lumière traversante une couche de retard de phase, au-dessus des deuxièmes zones réfléchissantes (23), et une deuxième couche optiquement active (62; 82), constituant pour de la lumière traversante une couche de retard de phase, au-dessus du côté du premier substrat porteur (11) opposé à la première couche optiquement active (52; 72),
    cependant que
    • les zones de résist (33) collent directement l'une à l'autre la première couche réfléchissante (12) et la deuxième couche réfléchissante (22), et
    • l'élément de sécurité (1) comporte, entre le premier substrat porteur (11) et la première couche réfléchissante (12), au moins une couche de vernis de gaufrage (15)
  6. Elément de sécurité (1) selon la revendication 5, caractérisé en ce que la première couche réfléchissante (12) comporte des premières zones réfléchissantes (13) et des premiers évidements (14) qui constituent un motif (7) dû au motif (7) de la couche de résist, et en ce que les zones de résist (33) collent directement l'une à l'autre les premières zones réfléchissantes (13) et deuxièmes zones réfléchissantes (23), en ce que les premières zones réfléchissantes (13) et deuxièmes zones réfléchissantes (23) et les zones de résist (33) coïncident entre elles quand l'élément de sécurité est vu de dessus, et en ce que les premiers (14) et les deuxièmes (24) évidements et les évidements (34) dans la couche de résist (30) coïncident entre eux et constituent l'écriture en négatif (3).
  7. Elément de sécurité (1) selon une des revendications 5 ou 6, caractérisé en ce que les deuxièmes zones réfléchissantes (23) et les zones de résist (33), de préférence aussi les premières zones réfléchissantes (13), présentent la forme de lignes (4) d'une largeur définie y.
  8. Elément de sécurité (1) selon une des revendications de 5 à 7, caractérisé en ce que, vu à travers l'élément de sécurité (1), un sous-motif (7') est reconnaissable.
  9. Matériau de transfert destiné au transfert d'éléments de sécurité sur un papier de sécurité ou sur un objet de valeur tel qu'un document de valeur, caractérisé en ce qu'il comporte une pluralité d'éléments de sécurité (1) selon une des revendications de 5 à 8 réalisés en tant qu'éléments de transfert.
  10. Elément de sécurité ou objet de valeur tel qu'un document de valeur, caractérisé en ce qu'il comporte un élément de sécurité (1) selon une des revendications de 5 à 8.
  11. Procédé de fabrication d'un papier de sécurité ou d'un objet de valeur tel qu'un document de valeur, caractérisé en ce qu'un élément de sécurité (1) selon une des revendications de 5 à 8 est placé dessus ou inséré au moins partiellement dedans.
EP10778569.3A 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 Not-in-force EP2498998B1 (fr)

Applications Claiming Priority (2)

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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
PCT/EP2010/006819 WO2011057759A1 (fr) 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

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GB201301790D0 (en) 2013-02-01 2013-03-20 Rue De Int Ltd Security devices and methods of manufacture thereof
GB201301788D0 (en) 2013-02-01 2013-03-20 Rue De Int Ltd Security devices and methods of manufacture thereof
DE102014001688A1 (de) * 2014-02-07 2015-08-13 Giesecke & Devrient Gmbh Herstellung eines Sicherheitselements mit Farbänderungseigenschaften

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DE10237059A1 (de) 2002-08-09 2004-02-26 Giesecke & Devrient Gmbh Datenträger
EP2287011B1 (fr) * 2004-04-30 2017-06-28 Giesecke & Devrient GmbH Elément de sécurité et son procédé de fabrication
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
DE102006012732A1 (de) 2006-03-17 2007-09-20 Giesecke & Devrient Gmbh Gitterbild
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

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