EP1744904B1 - Materiau en feuille et son procede de fabrication - Google Patents

Materiau en feuille et son procede de fabrication Download PDF

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Publication number
EP1744904B1
EP1744904B1 EP05747862.0A EP05747862A EP1744904B1 EP 1744904 B1 EP1744904 B1 EP 1744904B1 EP 05747862 A EP05747862 A EP 05747862A EP 1744904 B1 EP1744904 B1 EP 1744904B1
Authority
EP
European Patent Office
Prior art keywords
layer
liquid crystal
foil
security
substrate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP05747862.0A
Other languages
German (de)
English (en)
Other versions
EP1744904A1 (fr
EP1744904B2 (fr
Inventor
Winfried HOFFMÜLLER
Theodor Burchard
Thorsten Pillo
Manfred Heim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient Currency Technology GmbH
Original Assignee
Giesecke and Devrient 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34969287&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1744904(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE102004021246A external-priority patent/DE102004021246A1/de
Priority claimed from DE102004039355A external-priority patent/DE102004039355A1/de
Priority claimed from DE200410053008 external-priority patent/DE102004053008A1/de
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP1744904A1 publication Critical patent/EP1744904A1/fr
Application granted granted Critical
Publication of EP1744904B1 publication Critical patent/EP1744904B1/fr
Publication of EP1744904B2 publication Critical patent/EP1744904B2/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B44DECORATIVE ARTS
    • B44CPRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/10Applying flat materials, e.g. leaflets, pieces of fabrics
    • B44C1/14Metallic leaves or foils, e.g. gold leaf
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30Identification or security features, e.g. for preventing forgery
    • B42D25/36Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/364Liquid crystals
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29Securities; Bank notes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30Identification or security features, e.g. for preventing forgery
    • B42D25/36Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/373Metallic materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40Manufacture
    • B42D25/405Marking
    • B42D25/425Marking by deformation, e.g. embossing
    • B42D2033/26
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30Identification or security features, e.g. for preventing forgery
    • B42D25/36Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378Special inks
    • B42D25/391Special inks absorbing or reflecting polarised light

Definitions

  • the invention relates to a film material for transfer to a target substrate, and to methods for producing such a film material and to a security element that can be produced with the film material.
  • the invention further relates to a method for transferring a film material onto a target substrate, to a method for producing a security element and to a method for producing a valuable article, such as a security paper or a value documentary.
  • Valuables such as branded goods or documents of value, are often provided with security elements for the purpose of protection, which allow verification of the authenticity of the object of value and at the same time serve as protection against unauthorized reproduction.
  • optically variable elements are used as security elements, which give the viewer a different image impression, for example a different color impression, at different viewing angles.
  • holograms holographic grating images and other hologram-like diffraction structures are used for authenticity assurance, which offer the viewer a viewing angle-dependent diffraction pattern.
  • Security elements with hologram-like diffraction structures are transferred, inter alia, in the transfer process to the target substrate, for example a banknote.
  • the detachment of the security element from the carrier film takes place either via so-called separation or release layers, which are usually thermally activated, or by the low adhesion of the Adhesive system coated.
  • Other security features, such as luster pigments or other optically variable effect colors, are usually printed directly onto a paper substrate.
  • a transfer element with a plastic-like layer of a liquid crystal polymer which exhibits a pronounced color-interplay at room temperature.
  • the transfer element comprises, in addition to a carrier film, an optional wax layer, a protective lacquer layer, a layer of a liquid crystal polymer, a colored layer and a hot-melt adhesive layer.
  • the publication EP 1 120 737 A1 relates to an optical authentication device in combination with a verification tool, wherein the authentication device comprises a first layer of optically anisotropic material which is selectively oriented in different orientations over its surface such that an object is inscribed therein.
  • the verification tool includes another layer of optically anisotropic material that is selectively oriented in different orientations across its surface to decipher the object so that the object can be viewed as the authentication device is viewed through the examination tool.
  • the publication WO 2004/032099 A relates to a liquid crystal marker, a liquid crystal continuous label body, and a method for producing the liquid crystal marker.
  • the publication EP 1422 283 A1 which is a document under Article 54 (3) EPC, relates to the use of a printable polymerizable liquid crystal material as a printable system for the production of polymers and pigments.
  • the publication EP 1132 450 A2 relates to a multilayer reflective film or pigment having viewing-angle-dependent reflective properties.
  • Solvent-based liquid crystal coatings require orientation-promoting conditions in order to be effective.
  • special alignment layers are used for this purpose.
  • alignment layers are used which consist of a linear photopolymer which is exposed to align suitable radiation.
  • liquid crystalline materials can also be aligned by means of alignment layers provided by a finely-structured layer or a shear-stress-oriented layer. The orientation of the liquid-crystalline materials on such alignment layers is complicated by the additional work steps that are usually necessary for this.
  • the object of the invention is to provide a film material and a method for its production, which avoids the disadvantages of the prior art.
  • the liquid-crystalline material is prepared on a plastic carrier film. Due to its internal structure, the plastic carrier film has a preferred direction which is sufficient to align the liquid-crystalline material in the desired shape.
  • the plastic film has a surface structure produced in the production.
  • plastic carrier sheets suitable for aligning liquid crystal material are PET, PE, BOPP, OPP films and cellulose triacetate.
  • liquid-crystalline material can therefore be applied directly to the plastic carrier film without further alignment layers, preferably printed.
  • the liquid-crystalline material is partially applied.
  • liquid-crystalline layer is preferably applied in the form of patterns, characters or codes.
  • a functional layer is applied over the entire area of the carrier film to the liquid-crystalline layer and in the exposed areas.
  • a functional layer it is also possible to provide security elements made of liquid-crystalline material that are not present over the entire surface area, for example printed as a motif Target substrate to be transmitted.
  • the carrier film for the liquid-crystalline layer and the functional layer may be removed during or after the application of the film material to the target substrate.
  • the adhesion of the functional layer to the carrier film is advantageously lower than to the liquid-crystalline layer.
  • an adhesive layer is further applied for transfer to a target substrate.
  • additional layers of liquid-crystalline material may be applied partially, in particular in the form of patterns, characters or codes, between the partially applied liquid-crystalline layer and the functional layer. These may advantageously overlap at least partially with the first applied liquid-crystalline layer.
  • the liquid-crystalline layers are preferably applied as a lacquer layer of nematic, cholesteric or smectic liquid-crystalline material, preferably printed.
  • a lacquer layer of nematic, cholesteric or smectic liquid-crystalline material preferably printed.
  • gravure printing, screen printing, flexographic printing, knifecoating or curtain coating are particularly suitable.
  • a UV-curing lacquer layer is preferably applied, in particular printed.
  • a balance must be sought between sufficiently high adhesion of the functional layer to the liquid-crystalline layer to be detached and sufficiently low adhesion to the carrier film.
  • a layer of cholesteric liquid-crystalline material is applied, in particular printed, as the functional layer.
  • An embossing lacquer layer can also be advantageously used as a functional layer.
  • the embossing lacquer layer is expediently printed on and subsequently embossed, provided with a reflective layer, in particular a metal layer, and optionally demetallised in regions, for example, to introduce a negative writing into the metallized embossed structure.
  • the embossed structure advantageously forms an optically active microstructure, in particular a diffractive diffraction structure, a matt structure, an arrangement of microlenses or an arrangement of micromirrors.
  • the functional layer can advantageously be subjected to a corona treatment or be provided with an adhesion promoter.
  • one or more further layers can be applied to the functional layer, in particular printed, in order to produce more complex layer structures.
  • an embossing lacquer layer can be applied as a further layer, in particular be printed. After embossing, the embossing lacquer layer is advantageously embossed, metallized and optionally demetallised in some areas.
  • a machine-readable and / or decorative layer which is applied at least regionally, in particular in the form of patterns, characters or codes.
  • the machine-readable and / or decorative layer can be printed with a printing ink on the functional layer or on this already applied further layer.
  • a reflective layer can be applied.
  • this can also be formed by a reflective thin-film element.
  • a thin-film element is preferably formed with a reflection layer, an absorber layer and a dielectric spacer layer arranged between the reflection layer and the absorber layer.
  • one or more further layer collars are produced and, for example, connected to one another via laminating lacquer layers.
  • Optimal production conditions can be selected for the individual layer composites by the separate production.
  • a second security layer composite present on a second carrier film can be provided, which is connected via a second adhesive layer to the layer composite of carrier film, partial liquid-crystalline layer and optionally further layers.
  • the second security layer composite is produced by applying an embossing lacquer layer to the second carrier foil, embossing, metallizing and optionally demarcating the embossing lacquer layer by area.
  • the second security layer composite is produced by applying to the second carrier film a rastered metal layer, in particular in the form of patterns, characters or codes, or a semi-transparent metal layer, and on the metal layer a machine-readable and / or decorative layer, especially in the form of patterns, characters or codes.
  • the second security layer composite may also comprise a reflective layer.
  • the reflective layer may advantageously be formed by a metal layer or, in the case of more complex structures, by a reflective thin-film element having a viewing angle-dependent color impression.
  • the thin-film element is preferred formed with a reflective layer, an absorber layer and a dielectric spacer layer disposed between the reflective layer and the absorber layer.
  • the reflection layer of the thin-film element is preferably formed from an opaque or semitransparent metal layer.
  • the thin-film element can also be formed with at least one absorber layer and at least one dielectric spacer layer, the absorber layers and the dielectric spacer layers being arranged alternately one above the other.
  • the thin-film element is formed with a plurality of dielectric spacer layers, wherein adjoining layers having greatly different refractive indices are formed.
  • the second security layer composite comprises an optically active microstructure which is preferably formed as a diffractive diffraction structure, as a matt structure, as an arrangement of microlenses or as an arrangement of micromirrors.
  • a layer which contains machine-readable feature substances in particular magnetic, electrically conductive, phosphorescent, fluorescent or other luminescent substances, can be imprinted as a machine-readable and / or decorative layer.
  • the invention also includes a sheet material for security elements, which can be produced in particular according to one of the above-described manufacturing methods, and which contains a security layer sequence with a Plastic carrier film, which is suitable for the alignment of liquid-crystalline material, as well as with a first partially present layer of liquid-crystalline material, which is present in aligned form on the plastic carrier film.
  • the first liquid-crystalline layer of the film material is also advantageously formed from a nematic liquid-crystalline material.
  • the first liquid-crystalline layer preferably forms a phase-shifting layer.
  • At least one further layer of liquid-crystalline material is present between the partially applied liquid-crystalline layer and a functional layer projecting over the entire area.
  • the at least one further liquid-crystalline layer is preferably formed from cholesteric liquid-crystalline material.
  • the functional layer preferably consists of a UV-curing lacquer layer.
  • the functional layer may also be formed of a cholesteric liquid-crystalline material.
  • the film material may comprise an adhesive layer for transferring the security layer sequence to the target substrate.
  • the invention also includes a security element for securing valuables with a partially present layer of a liquid-crystalline material, in particular a nematic liquid-crystalline material, and a functional layer provided over the entire area, which is arranged directly above the partially present layer of liquid-crystalline material.
  • the functional layer is characterized by a UV-curing lacquer layer, a Layer of cholesteric liquid-crystalline material or an embossing lacquer layer formed.
  • the security element comprises a plastic carrier film which is suitable for aligning liquid-crystalline material.
  • the functional layer is preferably formed by an embossing lacquer layer into which an optically effective microstructure is embossed and which is provided with a reflective layer, in particular a metal layer, and optionally demetallized in certain areas.
  • the optically effective microstructure may advantageously be formed by a diffractive diffraction structure, a matt structure, an arrangement of microlenses or an arrangement of micromirrors.
  • the invention also includes a method of transferring a sheet material to a target substrate, wherein a sheet material of the type described is placed on the target substrate with the adhesive layer and bonded to the target substrate by heat and / or pressure.
  • the film material is correspondingly connected by pressure and radiation with the target substrate. If the film material is formed as a transfer material, the plastic carrier film of the liquid-crystalline layer is expediently removed during or shortly after application to the target substrate.
  • a film material of the type described is produced and with further layers for embedding in or for application to a security paper or a valuable item, in particular value document equipped.
  • the security element preferably contains a carrier substrate made of paper or plastic.
  • a film material of the type described is applied to an object to be protected, in particular adhered by heat and / or pressure and / or radiation.
  • the surface of the security paper or valuables can be specially treated to improve the adhesion of the film material on the surface and the optical efficiency of the film material.
  • a bonding agent can be used, which is applied to the surface of the security paper.
  • Valuables within the meaning of the present invention are in particular banknotes, stocks, bonds, certificates, vouchers, checks, high-quality admission tickets, but also other counterfeit-endangered papers, such as passports and other identification documents, as well as product security elements, such as labels, seals, packaging and the like.
  • object of value in the following includes all such objects, documents and product protection means.
  • security paper is understood to mean the precursor that can not yet be processed to a value document, which besides the security element can have further authenticity features, such as, for example, luminescent substances provided in the volume. security paper is usually in quasi endless form and will be further processed at a later date.
  • Fig.1 shows a schematic representation of a banknote 10 with two security elements 12 and 16, which are each made using a film material according to the invention.
  • the first security element represents a security thread 12 that emerges at certain window areas 14 on the surface of the banknote 10, while it is embedded in the intervening areas inside the banknote 10.
  • the second security element is formed by a wide security strip 16 glued onto the banknote paper with a heat-seal adhesive.
  • Fig. 2 shows a plan view of a portion of the security strip 16, as it appears when viewed without aids or when viewed through a linear polarizer 20. Viewed without aids, the security strip 16 shows shiny metallic, optically variable diffraction structures 22, such as holograms or kinegrams. Such diffraction structures are known to the person skilled in the art and are therefore not explained further below. Instead of the diffraction structures 22, matt structures or refractive structures may also be provided, for example.
  • additional structures in the exemplary embodiment a honeycomb pattern 24, appear.
  • the structures can also be visualized with a circular polarizer. These structures, which are virtually invisible to the naked eye, can be used to check the authenticity of the banknote 10.
  • Fig. 3 shows a cross-sectional view of an intermediate step in the production of a film material 30, for example, in a security thread 12 or a security strip 16 of the in Fig. 1 shown type can be used.
  • a layer 34 of nematic liquid-crystalline material is printed on a transparent carrier film 32, for example a smooth plastic film of good surface quality.
  • the Nematen für 34 is typically printed in the form of a motif of patterns, characters or a coding, for example in the form of in Fig. 2 shown honeycomb pattern. Due to the surface structure of the carrier film 32, which specifies a preferred direction for the alignment of the liquid-crystalline material, the nemate layer 34 can be printed directly onto the carrier film.
  • the functional layer On the Nematen für 34 and the carrier film 32 is fully functional layer, e.g. a UV-crosslinkable lacquer layer 36 printed. Alternatively, it is also possible to use a layer of cholesteric liquid-crystalline material or an embossing lacquer layer as the functional layer 36. In order to be able to transfer the regionally present nematic layer 34 and, if appropriate, the further layer of cholesteric liquid-crystalline material to a target substrate, such as a security paper or a document of value, with removal of the carrier film 32 in a subsequent operation, the functional layer is preferably designed such that the latter Adhesion to the carrier film 32 is less than to the Nematen für 34th
  • an adhesive layer 38 is applied to the functional layer 36, with which the layer composite of carrier film 32, Nematen slaughter 34 and functional layer 36 on a target substrate, such as a security paper, a document of value or another thread or strip structure 35, can be laminated.
  • a target substrate such as a security paper, a document of value or another thread or strip structure 35.
  • the carrier film 32 for the liquid-crystalline materials 34 and 36 can be removed by separation winding last. The damage-free detachability of the carrier film 32 is ensured by the greater adhesion of the functional layer 36 to the nemate layer 34.
  • both the functional layer and the adhesive layer may contain machine-readable feature substances, such as, for example, magnetic, electrically conductive, phosphorescent or fluorescent substances.
  • a further, not shown here layer can be printed on the functional layer 36.
  • the further layer can be provided in particular with recesses or in the form of patterns, characters or codes.
  • the layer can be provided by an absorbent imprint or a reflective metal layer.
  • the layer can be produced by printing the functional layer 36 with a commercially available, in particular black printing ink. This is particularly suitable when the functional layer 36 consists of cholesteric liquid-crystalline material.
  • the further layer can be provided by a metal layer into which recesses, for example in the form of a negative writing, can be introduced by partial demetallization. Under the layer another, eg machine-readable layer can be printed. Machine-readable security features can also be accommodated in the further layer itself. The further manufacturing process then proceeds, as already related to Fig. 3 described.
  • a nematic liquid crystal layer 34 is printed on a carrier film 32.
  • a nematic liquid crystal layer 34 is printed over the carrier film 32 and the Nematen für 34.
  • UV-curable Embossing lacquer layer 62 is printed, whose adhesion to the carrier film 32 is less than to the Nematen für 34, so that the embossing lacquer layer 62 fulfills the function of the functional layer described above during the transfer of the film material 60 to a target substrate.
  • a desired embossed structure 64 for example a diffraction structure, is embossed into the embossing lacquer layer 62, and a reflective layer 66 is applied, for example in the form of a metal layer, in particular vapor-deposited, into which recesses 68, in the exemplary embodiment in the form of a negative writing, are introduced by partial demetallization .
  • the embossing structure 64 may also be provided with a high refractive index layer. Examples of suitable high-index materials are CaS, CrO 2 , ZnSi, TiO 2 or SiO x .
  • an adhesive layer 38 is applied to the composite layer for transfer to the target substrate.
  • the embossing pattern 64 can also be provided with a color shift effect thin film element, as described below with reference to FIG Fig. 6 is described in detail.
  • further machine-readable and / or decorative layers can be applied to the partially demetallized embossing lacquer layer 62, in particular also in overlap with the metal layer 66.
  • a commercially available printing ink can be printed, which is then recognizable in the recesses or demetallized areas of the embossing lacquer layer when viewing the foil material applied to a substrate.
  • the ink can as well as the Adhesive layer 38 also contain machine-readable feature substances, such as magnetic, electrically conductive, phosphorescent or fluorescent substances.
  • Fig. 5 illustrates the production of a sheet material 70 according to another embodiment of the invention. It will, as in Fig. 5 (a) a first layer composite 72 is produced from a first carrier foil 32, a nematic liquid crystal layer 34 and a functional layer 36, as described in connection with FIG Fig. 3 described.
  • the functional layer 36 may be formed, for example, by a UV-crosslinkable lacquer layer or a layer of cholesteric liquid-crystalline material.
  • a second security layer composite 74 is produced by printing on a second carrier film 80 an embossing lacquer layer, embossing a desired embossed structure, in the exemplary embodiment a diffraction structure, into the embossing lacquer, onto which embossed layer 82 a metal layer 84 is vapor-deposited, and by partial demetallization of the Metal layer 84 recesses 86, for example, be generated in the form of negative writing.
  • the second security layer composite 74 is applied via an adhesive layer 76 (FIG. Fig. 5 (c) ) laminated on the first layer composite 72, as by the FIGS. 5 (b) and 5 (a) connecting arrow 78 indicated. Subsequently, the second carrier film 80 is removed by a separation winding and applied for the transfer of an adhesive layer 38 on the Schichtverbünd thus produced, as in Fig. 5 (c) shown. If the film material is to be used as a transfer material for transfer to a target substrate, the carrier film 32 can be used are removed after the application of the transfer material 70 to the target substrate, so that the entire security layer composite is then present without carrier films. The polarization effect features are thus not affected by films in their effect and can be viewed with high contrast.
  • the carrier film 32 can also be removed by separating windings and further layers of the thread structure, such as a primer and a heat sealing lacquer, can be applied to the then exposed liquid crystal layers 34 and 36.
  • the reduced by the detachment of the second carrier film 80 protection function for the metallization can be compensated by protective lacquer layers.
  • Conventional protective lacquer layers are optically largely isotropic and therefore do not impair the recognizability of polarizing effects.
  • an additional, dark-colored layer can optionally be partially applied to the security layer composite 74, in order to ensure good visibility of the color effect of the cholesteric liquid crystal layer.
  • the embossing lacquer layer 82 can be darkened.
  • the second security layer composite may also contain only a metallic reflection layer instead of the embossed structure, which is preferably integrated with large Demetallmaschinesan turnover in a print motif.
  • the film material according to the invention then with the Nematen für 34 an additional test level, which can be authenticated with a polarizer.
  • the thin-film element 92 has a reflection layer 94, an absorber layer 98 and a dielectric spacer layer 96 arranged between the reflection layer and the absorber layer.
  • the color shift effect in such thin-film elements is based on viewing angle-dependent interference effects due to multiple reflections in the different sub-layers of the element.
  • the absorber layer 98 and / or the dielectric spacer layer 96 may have recesses in the form of patterns, characters or codes in which no color-shift effect can be recognized.
  • the reflection layer 94 may also have recesses in the form of patterns, characters or codes, which then form transparent or semi-transparent regions in the thin film element 92.
  • the thin-film element may have a layer sequence of absorber layer / dielectric layer / absorber layer or a sequence of several layers of alternating high-index and low-index dielectrics.
  • a layer sequence of reflection layer and an absorbing dielectric layer is also possible.
  • the second security layer composite produced in this way is then laminated onto the first layer composite via an adhesive layer 76 and the second carrier film is removed by a separation winding.
  • an adhesive layer 38 is exposed to the now exposed one. Rear side of the thin-film element 92 applied. On the exposed back side of the thin-film element 92, prior to the application of the adhesive layer 38, further machine-readable and / or decorative layers, e.g. with a magnetic paint, are applied. After the transfer, the first carrier film 32 can also be removed.
  • a sheet material for a double-sided security thread having a liquid crystal-based color-tilting or polarizing effect which is recognizable to the viewer from one side and a thin-film element having a color-shift effect recognizable from the second side is produced.
  • the film material differs from that in Fig. 6 shown in that the functional layer 36 is formed of cholesteric liquid crystalline material.
  • the adhesive layer 76 also forms a dark, preferably black background.
  • the adhesive layer 76 can be dyed or, if appropriate, subsequently blackened by the action of a laser beam.
  • the thin film element 92 has an order reverse to the layer order described above, ie, the reflective layer is in the film material adjacent to the adhesive layer 76, and the absorber layer is adjacent to the adhesive layer 38.
  • Fig. 7 shows a film material 100 according to another embodiment of the invention, in which, as in Fig. 3 on a smooth plastic carrier film 32, which is suitable for aligning liquid-crystalline material, a nematic liquid crystal layer 34 and a UV-crosslinkable functional layer 36, for example of cholesteric liquid crystal material, are printed.
  • An embossing lacquer layer is further printed onto the functional layer 36, a desired embossed structure, in the exemplary embodiment a diffraction structure, embossed into the embossing lacquer layer, and a metal layer 104 is vapor-deposited onto the embossed layer 102.
  • Metal layer 104 are introduced by partial demetallization recesses 106 in the form of negative writing.
  • the metal layer 104 it is also possible to use a transparent high-index layer which has a refractive index greater than 2.
  • a transparent high-index layer which has a refractive index greater than 2.
  • a dark background which is formed by a corresponding additional layer, for example a black imprint, or can also be present on the target substrate, both the Diffraction structure and the liquid-crystalline layers 34 and 36 over the entire surface perceptible.
  • the embossing lacquer layer 102 on the functional layer 36 is advantageously subjected beforehand to a corona treatment or it is provided with a suitable adhesion promoter.
  • An adhesive layer 38 is applied to the entire layer composite for application to the target substrate.
  • the carrier film 32 can be removed after the application of the film material 100 or left on the structure.
  • a second security layer composite 114 is produced by applying to a second carrier foil 120 a screened aluminum layer 122 with recesses in the form of negative writing, and onto the aluminum layer a magnetic layer 124, in the exemplary embodiment in the form of a coding, is applied.
  • This second security layer composite 114 is in Fig. 8 (b) shown.
  • the aluminum layer 122 can also be provided as a full-surface layer with recesses, for example in the form of a negative writing, to which in turn the magnetic layer 124 is applied.
  • the second security layer composite 114 is then applied via an adhesive layer 116 (FIG. Fig. 8 (c) ) laminated on the first layer composite 112.
  • further layers 118 such as a white cover layer, which are required for the embedding of the security thread in a security paper, can be applied to the back side of the second carrier film 120.
  • an adhesive layer 38 for example a heat sealing lacquer, is applied for the transfer to the target substrate.
  • the carrier film 32 may be removed by means of parting, and further layers of the thread structure, such as a primer and a heat sealing lacquer, may be applied to the then exposed liquid crystal layers 34 and 36.
  • FIG Fig. 8 For example, instead of the magnetic layer 124 applied in the form of a coding, it is also possible to use a dark, in particular black layer with recesses and a magnetic layer in regions, for example in the form of magnetic bits. In particular, not all black areas need to be magnetic at the same time. In this way, a magnetic coding in the black layer can be optically hidden.
  • FIG. 9 Another variant of the embodiment of Fig. 8 , which differs only in the configuration of the second security layer composite, is in Fig. 9 shown.
  • the second security layer composite 132 of the film material 130 of the Fig. 9 instead of the screened aluminum layer, a full-area, semitransparent metal layer 136 applied to a carrier film 134, on which a magnetic layer 138 is arranged, for example, in the form of a coding.
  • the further procedure in the production of the security thread 130 follows that described above in connection with FIG Fig. 8 given description.
  • Fig. 10 illustrates the production of a film material 140 for a hologram security thread with magnetic coding and nematic printing according to a further embodiment of the invention.
  • a first layer composite 150 is produced from a first plastic carrier film 152, a nematic liquid crystal layer 154, a functional layer 156 made of a modified UV-curing lacquer and a first adhesive layer 158, as shown in FIG Fig. 10 (a) shown.
  • a second security layer composite 160 which in Fig. 10 (b) an embossing lacquer layer is printed on a second plastic carrier foil 162, a desired diffraction structure is embossed into the embossing lacquer and a metal layer 166, for example an aluminum layer, vapor deposited on the embossed layer 164, in which, as already described in connection with FIG Fig. 5 described by partial demetallization recesses 168, for example, be generated in the form of negative writing.
  • a magnetic layer 170 in the form of a coding is applied to the rear side of the carrier foil 162 not coated with embossing lacquer. The magnetic bits of the magnetic coding are then covered with a cover layer 172.
  • a third layer composite 180 which functions as a cover element in the finished security thread, is produced by applying a full-area metal layer 184 to a third, particularly thin plastic carrier film 182 and providing the metal layer 184 with another full-surface adhesive layer 186, as in FIG Fig. 10 (c) shown.
  • the first layer composite 150 with the nematic print is then laminated onto the top side of the hologram layer composite 160 (arrow 142) and the cover layer composite 180 is laminated via the adhesive layer 186 onto the underside of the hologram layer composite 160 carrying the magnetic code (arrow 144).
  • Additional layers 146 such as a white topcoat, required for embedding the security thread in a security paper can then be applied to the back side of the third carrier film 182.
  • an adhesive layer 38 such as a heat sealing lacquer, is applied as in Figure 10 (d) shown.
  • the backing film 152 of the first layer composite 150 may then be removed by means of parting and other layers of the thread structure, such as a primer and a heat sealing lacquer, may be applied to the then exposed liquid crystal layers 154 and 156.
  • a target substrate 200 eg a security paper or a plastic film
  • the transfer material 70 is placed with the heat seal adhesive layer 38 on the target substrate 200 and pressed.
  • the pressing for example, with a not shown heated Transfer stamp or a transfer roll done.
  • the adhesive layer 38 connects in the desired regions 202 with the target substrate 200, so that a transfer element, possibly with a predetermined outline shape, arises.
  • the carrier film 32 of the liquid crystal layers 34, 36 can be removed during the application process or shortly thereafter.
  • the surface of the target substrate 200 may be specially treated. As a result, in particular the adhesive effect of the transfer material and the optical efficiency of the security features provided by this can be improved.
  • a bonding agent can be applied to the surface of the transfer material.
  • Fig. 12 shows a security element 190 according to a further embodiment of the invention, in which, as in Fig. 4 on a smooth plastic carrier film 32, for example a PET film, which is suitable for aligning liquid-crystalline material, a nematic liquid crystal layer 34 and over the entire surface of a UV-curable embossing lacquer layer 192 are printed as a functional layer.
  • a metal layer 194 is vapor-deposited onto the diffraction structure impressed into the embossing lacquer layer 192, into which cut-outs can be introduced, if appropriate, by partial demetallization.
  • a machine-readable layer 196 which contains machine-readable feature substances, such as, for example, magnetic, electrically conductive, phosphorescent or fluorescent substances, and a white cover layer 198, which is required for the embedding of the security thread in a security paper, partially applied, for example in the form of a motif.
  • machine-readable feature substances such as, for example, magnetic, electrically conductive, phosphorescent or fluorescent substances
  • white cover layer 198 which is required for the embedding of the security thread in a security paper, partially applied, for example in the form of a motif.
  • the layer composite of plastic carrier film 32, nematic liquid crystal layer 34, metallized embossing lacquer layer 192, 94, machine-readable layer 196 and cover layer 198 is then laminated by means of the adhesive layer 38 onto a target substrate 199, such as a PET film.
  • the plastic carrier film 32 can be removed by separation winding again. In this case, it is to be ensured that the adhesion of the functional layer 192 to the carrier film 32 is lower than to the nemate layer 34.
  • the carrier film 32 in the layer composite. Such a configuration is particularly suitable when the security element is present in the form of a security strip in a papermaking-made or punched-out window of a banknote.
  • the carrier film 32 then serves, inter alia, as a cover film.
  • Fig. 13 (a) shows in cross-sectional representation a film material 210 according to a further embodiment of the invention, in which, as in Fig. 3 On a smooth, transparent plastic carrier film 32, a nematic liquid crystal layer 34 and a functional layer 36 are printed from cholesteric liquid-crystalline material.
  • the nemate layer 34 is typically printed in the form of a motif of patterns, characters or a code, for example in the form of in Fig. 13 (b) shown letter sequences "PL".
  • a reflective metal layer 216 is applied over the nemate layer 34.
  • an absorbent imprint with a commercially available, in particular black ink is further printed. This provides a background dark layer 218 essential to the visibility of the color shift effects of the cholesteric liquid crystal layer.
  • the adhesive layer 38 is applied, with which the layer composite of carrier film 32, Nematen für 34, functional layer 36, Meta Horn 216 and dark background layer 218 on a target substrate, such as a security paper, a document of value or another thread or strip structure, can be laminated , If desired or required, the carrier film 32 for the liquid-crystalline materials 34 and 36 can be removed by separation winding last. The damage-free detachability of the carrier film 32 is ensured by the greater adhesion of the functional layer 36 to the Nematen für 34.
  • the nemate layer 34 may also be present in the region 214 in the form of a motif.
  • the cholesteric liquid-crystal layer 36 can be seen.
  • the films formed by the nemate layer 34 appear.

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Claims (51)

  1. Procédé pour la fabrication d'un matériau en feuille (30) pour des éléments de sécurité, avec les étapes suivantes du Procédé :
    a) mise à disposition d'une feuille de support en plastique (32), laquelle convient pour l'orientation d'un matériau cristallin liquide,
    b) application partielle d'une première couche (34) en un matériau cristallin liquide sur la feuille de support (32), le matériau cristallin liquide étant orienté,
    caractérisé en ce que
    à l'étape a), en guise de feuille de support (32), on met à disposition une feuille qui présente une structure de surface obtenue lors de la fabrication et qui possède une direction préférentielle en raison de sa structure intérieure, laquelle suffit pour orienter selon la forme souhaitée le matériau cristallin liquide à l'étape b).
  2. Procédé selon la revendication 1, caractérisé en ce que, en guise de feuille de support en plastique (32), on met à disposition une feuille en PET, PE, BOPP, OPP ou en triacétate de cellulose.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'on applique, en particulier imprime, sur la première couche cristalline liquide (34) et la feuille de support (32), sur toute la surface, une couche fonctionnelle (36) sous la forme d'une couche de vernis durcissant aux UV.
  4. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'on applique, en particulier imprime, sur la première couche cristalline liquide (34) et la feuille de support (32), sur toute la surface, une couche fonctionnelle (36) sous la forme d'une couche en matériau cristallin liquide cholestérique.
  5. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'on applique, en particulier imprime, sur la première couche cristalline liquide (34) et la feuille de support (32), sur toute la surface, une couche fonctionnelle sous la forme d'une couche de vernis de gaufrage (62), laquelle est gaufrée consécutivement.
  6. Procédé selon la revendication 5, caractérisé en ce que la couche de vernis de gaufrage (62) est métallisée, et le cas échéant démétallisée par endroits.
  7. Procédé selon l'une au moins des revendications 1 à 6, caractérisé en ce qu'une couche adhésive (38) pour le transfert de la liaison de couches formée est appliquée sur un substrat cible.
  8. Procédé selon l'une au moins des revendications 1 à 7, caractérisé en ce que le matériau en feuille (30) est réalisé en tant que matériau d'application.
  9. Procédé selon l'une au moins des revendications 1 à 7, caractérisé en ce que le matériau en feuille (30) est réalisé en tant qu'un matériau de transfert.
  10. Procédé selon la revendication 9 et l'une des revendications 3 à 6,
    caractérisé en ce que l'adhérence de la couche fonctionnelle (62) à la feuille de support (32) est moins importante que celle à la couche cristalline liquide (34).
  11. Procédé selon l'une au moins des revendications 3 à 10, caractérisé en ce que, entre la première couche cristalline liquide (34) partiellement appliquée et la couche fonctionnelle (36), au moins une autre couche cristalline liquide est partiellement appliquée.
  12. Procédé selon l'une au moins des revendications 1 à 11, caractérisé en ce que la première couche cristalline liquide (34) et/ou les autres couches cristallines liquides sont appliquées sous la forme de motifs, symboles ou codages.
  13. Procédé selon l'une au moins des revendications 1 à 12, caractérisé en ce que la première couche cristalline liquide (34) et/ou les autres couches cristallines liquides sont appliquées, de préférence imprimées, en tant que couche de vernis en un matériau cristallin liquide nématique, cholestérique ou smectique.
  14. Procédé selon l'une au moins des revendications 1 à 13, caractérisé en ce que la première couche cristalline liquide (34) et/ou les autres couches cristallines liquides et/ou la couche fonctionnelle (36) sont imprimées au moyen d'une impression en creux, d'une sérigraphie, d'une flexographie, d'une enduction à la racle ou d'un couchage au rideau.
  15. Procédé selon l'une au moins des revendications 3 à 14, caractérisé en ce que la couche fonctionnelle (36) est soumise à un traitement corona ou bien est munie d'un agent d'adhérence.
  16. Procédé selon l'une au moins des revendications 3 à 15, caractérisé en ce que qu'une ou plusieurs autres couches sont appliquées, en particulier imprimées, sur la couche fonctionnelle (36).
  17. Procédé selon la revendication 16, caractérisé en ce qu'en guise d'une autre couche, on applique, en particulier imprime, une couche de vernis de gaufrage qui est consécutivement gaufrée, métallisée, et le cas échéant démétallisée par endroits.
  18. Procédé selon la revendication 16 ou 17, caractérisé en ce qu'en guise d'une autre couche, on applique, en particulier imprime, au moins par endroits, une couche lisible par machine et/ou décorative.
  19. Procédé selon la revendication 18, caractérisé en ce que la couche lisible par machine et/ou décorative est imprimée sous forme de motifs, symboles ou codages.
  20. Procédé selon l'une au moins des revendications 16 à 19, caractérisé en ce qu'en guise d'une autre couche, on applique une couche réfléchissante.
  21. Procédé selon l'une au moins des revendications 1 à 20, caractérisé en ce que la couche de support (32) forme, avec le matériau cristallin liquide (34) et les autres couches le cas échéant, une première liaison de couches (72) et en ce qu'une deuxième liaison de couches de sécurité (74) se trouvant sur la deuxième feuille de support (80) est mise à disposition, laquelle est en liaison via une couche adhésive (76) avec la première liaison de couches (72).
  22. Procédé selon la revendication 21, caractérisé en ce que la deuxième liaison de couches de sécurité (74) est fabriquée grâce à l'application d'une couche de vernis de gaufrage sur la deuxième feuille de support (80), à un gaufrage, une métallisation, et le cas échéant une démétallisation par endroits de la couche de vernis de gaufrage.
  23. Procédé selon la revendication 21, caractérisé en ce que la deuxième liaison de couches de sécurité (74) est fabriquée grâce à l'application d'une couche métallique tramée, en particulier sous la forme de motifs, symboles ou codages, ou d'une couche métallique semi-transparente sur la deuxième feuille de support (80) et grâce à l'application consécutive d'au moins une couche lisible par machine et/ou décorative sur la couche métallique, en particulier sous la forme de motifs, symboles ou codages.
  24. Procédé selon l'une au moins des revendications 21 à 23, caractérisé en ce que la deuxième liaison de couches de sécurité (74) comprend une couche réfléchissante.
  25. Procédé selon la revendication 19 ou 24, caractérisé en ce que la couche réfléchissante est formée par une couche métallique.
  26. Procédé selon la revendication 19 ou 24, caractérisé en ce que la couche réfléchissante est formée par un élément à couche mince (92) réfléchissant avec un effet de couleur en fonction de l'angle d'observation.
  27. Procédé selon la revendication 26, caractérisé en ce que l'élément à couche mince (92) est formé avec une couche de réflexion (94), une couche d'absorption (98) et une couche d'espacement diélectrique (96) disposée entre la couche de réflexion et la couche d'absorption.
  28. Procédé selon l'une au moins des revendications 21 à 23, caractérisé en ce que la deuxième liaison de couches de sécurité (74) comprend une microstructure à efficacité optique.
  29. Procédé selon la revendication 28, caractérisé en ce que la microstructure à efficacité optique est formée en tant que structure de diffraction diffractive, en tant que structure matte, en tant qu'agencement de microlentilles ou en tant qu'agencement de micro-miroirs.
  30. Procédé selon l'une au moins des revendications 1 à 29, caractérisé en ce que, en guise de couche lisible par machine et/ou décorative, on imprime une couche contenant des substances caractéristiques lisibles par machine, en particulier des substances magnétiques, électroconductrices, phosphorescentes, fluorescentes ou d'autres substances luminescentes.
  31. Matériau en feuille (30) pour éléments de sécurité, pouvant en particulier être fabriqué selon l'une des revendications 1 à 30, avec
    - une feuille de support en plastique (32), laquelle convient pour l'orientation d'un matériau cristallin liquide, ainsi qu'avec
    - une première couche (34) partiellement présente en un matériau cristallin liquide, lequel se présente sous une forme orientée,
    caractérisé en ce que
    la feuille de support en plastique (32) présente une structure de surface obtenue lors de la fabrication et possède une direction préférentielle en raison de sa structure intérieure, laquelle suffit pour orienter un matériau cristallin liquide selon une forme souhaitée lors de l'application.
  32. Matériau en feuille (30) selon la revendication 31, caractérisé en ce que la feuille de support en plastique (32) est une feuille en PET, PE, BOPP, OPP ou en triacétate de cellulose.
  33. Matériau en feuille (30) selon la revendication 31 ou 32, caractérisé en ce qu'une couche fonctionnelle présente sur toute la surface est disposée par-dessus la première couche cristalline liquide (34) partiellement présente et la couche de support (32), laquelle couche fonctionnelle est formée par une couche de vernis durcissant aux UV ou un matériau cristallin liquide cholestérique.
  34. Matériau en feuille (30) selon la revendication 31 ou 32, caractérisé en ce qu'une couche fonctionnelle (36) présente sur toute la surface est disposée par-dessus la première couche cristalline liquide (34) présente partiellement et la feuille de support (32), laquelle couche fonctionnelle est formée par une couche de vernis de gaufrage (62), laquelle est gaufrée.
  35. Matériau en feuille (30) selon la revendication 34, caractérisé en ce que la couche de vernis de gaufrage (62) est métallisée, et le cas échéant démétallisée par endroits.
  36. Matériau en feuille (30) selon l'une des revendications 33 à 35, caractérisé en ce que, entre la première couche cristalline liquide (34) appliquée partiellement et la couche fonctionnelle (36), au moins une autre couche cristalline liquide est appliquée partiellement.
  37. Matériau en feuille (30) selon l'une au moins des revendications 31 à 36, caractérisé en ce que la première couche cristalline liquide (34) est formée en un matériau cristallin liquide nématique.
  38. Matériau en feuille (30) selon l'une au moins des revendications 31 à 37, caractérisé en ce que la première couche cristalline liquide (34) forme une couche de déphasage.
  39. Matériau en feuille (30) selon l'une au moins des revendications 31 à 38, caractérisé en ce que cette au moins une autre couche cristalline liquide est formée en un matériau cristallin liquide cholestérique.
  40. Matériau en feuille (30) selon l'une au moins des revendications 33 à 39, caractérisé en ce que l'adhérence de la couche fonctionnelle (62) à la feuille de support (32) est moins importante que celle à la couche cristalline liquide (34).
  41. Matériau en feuille (30) selon l'une au moins des revendications 33 à 40, caractérisé en ce qu'une ou plusieurs autres couches sont appliquées sur la couche fonctionnelle (36).
  42. Matériau en feuille (30) selon la revendication 41, caractérisé en ce que, en guise d'une autre couche, on applique une couche lisible par machine et/ou décorative et/ou réfléchissante.
  43. Matériau en feuille (30) selon la revendication 42, caractérisé en ce que, en guise de couche lisible par machine et/ou décorative, on applique une couche contenant des substances caractéristiques lisibles par machine, en particulier des substances magnétiques, électroconductrices, phosphorescentes, fluorescentes ou d'autres substances luminescentes.
  44. Matériau en feuille (30) selon l'une au moins des revendications 31 à 43, caractérisé en ce que le matériau en feuille (30) comprend une couche adhésive (38) pour transmettre la succession de couches de sécurité sur un substrat cible.
  45. Procédé pour le transfert d'un matériau en feuille (30), en particulier d'un matériau de transfert, sur un substrat cible, dans lequel un matériau en feuille (30) selon l'une au moins des revendications 1 à 44 est posé avec la couche adhésive (38) sur le substrat cible et est lié au substrat cible grâce à l'effet de la chaleur et/ou d'une impression et/ou d'un rayonnement.
  46. Procédé selon la revendication 45, caractérisé en ce que la feuille de support en plastique (32) est enlevée lors de l'application sur le substrat cible ou juste après celle-ci.
  47. Procédé pour la fabrication d'un élément de sécurité, en particulier d'un fil de sécurité ou d'un élément de sécurité à appliquer ou à transférer, dans lequel un matériau en feuille (30) selon l'une au moins des revendications 1 à 44 est fabriqué, et est muni d'autres couches pour l'intégration dans un papier de sécurité ou un objet de valeur ou pour l'application sur celui-ci.
  48. Procédé selon la revendication 47, caractérisé en ce que l'élément de sécurité contient un substrat de support en papier ou plastique.
  49. Procédé pour la fabrication d'un objet de valeur, tel un papier de sécurité ou un document de valeur, dans lequel un matériau en feuille (30) selon l'une au moins des revendications 1 à 44 est appliqué, en particulier collé grâce à l'effet de la chaleur et/ou d'une impression et/ou d'un rayonnement, sur un objet à sécuriser.
  50. Elément de sécurité pour la sécurisation d'objets de valeur, avec
    - une couche (34) partiellement présente en un matériau cristallin liquide,
    - une couche fonctionnelle (36) présente sur toute la surface, laquelle est directement disposée par-dessus la couche (34) partiellement présente en matériau cristallin liquide,
    dans lequel la couche fonctionnelle (36) est formée par une couche de vernis durcissant aux UV, une couche en matériau cristallin liquide cholestérique ou une couche de vernis de gaufrage (62), et dans lequel l'élément de sécurité comprend en outre une feuille de support en plastique (32), laquelle convient pour l'orientation d'un matériau cristallin liquide et laquelle présente une structure de surface obtenue lors de la fabrication et possède une direction préférentielle en raison de sa structure intérieure, laquelle suffit pour orienter selon une forme souhaitée un matériau cristallin liquide lors de l'application.
  51. Elément de sécurité selon la revendication 50, caractérisé en ce que la couche fonctionnelle est formée par une couche de vernis de gaufrage (62), est gaufrée, métallisée, et le cas échéant démétallisée par endroits.
EP05747862.0A 2004-04-30 2005-04-29 Materiau en feuille et son procede de fabrication Not-in-force EP1744904B2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102004021246A DE102004021246A1 (de) 2004-04-30 2004-04-30 Sicherheitselement und Verfahren zu seiner Herstellung
DE102004039355A DE102004039355A1 (de) 2004-08-12 2004-08-12 Sicherheitselement und Verfahren zu seiner Herstellung
DE200410053008 DE102004053008A1 (de) 2004-10-29 2004-10-29 Folienmaterial und Verfahren zu seiner Herstellung
PCT/EP2005/004684 WO2005105475A1 (fr) 2004-04-30 2005-04-29 Materiau en feuille et son procede de fabrication

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EP1744904A1 EP1744904A1 (fr) 2007-01-24
EP1744904B1 true EP1744904B1 (fr) 2015-09-09
EP1744904B2 EP1744904B2 (fr) 2019-11-06

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EP (1) EP1744904B2 (fr)
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US20070165182A1 (en) 2007-07-19
EP1744904A1 (fr) 2007-01-24
RU2377133C2 (ru) 2009-12-27
EP1744904B2 (fr) 2019-11-06
WO2005105475A1 (fr) 2005-11-10
RU2006141814A (ru) 2008-06-10

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