EP1291463B1 - Procédé de préparation d'un feuille métallisée sélectivement, et le produit correspondant - Google Patents

Procédé de préparation d'un feuille métallisée sélectivement, et le produit correspondant Download PDF

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Publication number
EP1291463B1
EP1291463B1 EP02019580.6A EP02019580A EP1291463B1 EP 1291463 B1 EP1291463 B1 EP 1291463B1 EP 02019580 A EP02019580 A EP 02019580A EP 1291463 B1 EP1291463 B1 EP 1291463B1
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EP
European Patent Office
Prior art keywords
layer
accordance
carrier substrate
ink
metal
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.)
Expired - Lifetime
Application number
EP02019580.6A
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German (de)
English (en)
Other versions
EP1291463A1 (fr
Inventor
Friedrich Dr. Kastner
Martin Dr. Bergsmann
Roland Einsiedler
Johann Hillburger
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.)
Hueck Folien GmbH
Original Assignee
Hueck Folien GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hueck Folien GmbH filed Critical Hueck Folien GmbH
Publication of EP1291463A1 publication Critical patent/EP1291463A1/fr
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Publication of EP1291463B1 publication Critical patent/EP1291463B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0027—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or layers by lamination or by fusion of the coatings or layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/355—Security threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06Q—DECORATING TEXTILES
    • D06Q1/00—Decorating textiles
    • D06Q1/04—Decorating textiles by metallising
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
    • D21H21/42—Ribbons or strips
    • B42D2033/10—

Definitions

  • the invention relates to a selectively metallized film, in particular for use as a security element, in particular in value documents, as well as a method for producing the selectively metallized film.
  • security elements in particular security threads consisting of a translucent plastic film, an over the entire security element extending opaque coating having recesses in the form of the introduced coding, in particular in the form of characters and patterns known.
  • coloring and / or luminescent substances may be present at least in the regions defined by the recesses, by means of which the coding differs from the opaque coating under the corresponding influence of light in contrasting color.
  • the DE-A-197 39 193 describes security films for securities in which a metallic coating is applied to a translucent film, which is not full-surface in the finished film, but has recesses that are clearly visible in transmitted light.
  • the preparation of this film takes place in that a carrier film is printed with a highly pigmented printing ink, wherein the inking is not carried out over the entire surface, the ink is dried to form a porous paint, then a metallic cover layer is applied and in a further step, the highly pigmented ink by washing is removed with a solvent, optionally also under mechanical action.
  • the metallic cover layer mitentfernt also, whereby the recognizable in transmitted light recesses are formed.
  • the ink which has been printed with a high pigment content after drying is formed on the printing substrate with a raised application of paint having a porous, porous structure with a high surface area.
  • a covering layer of small thickness applied to such a paint application does not result in a continuous, area-covering coating, but covers the dried solid body only partially because of its large surface area and porous structure, so that the color body is at least partially readily accessible from the outside for solvents remains.
  • a method for producing a decorated film having a metal layer with a predetermined pattern will be described.
  • a base film is provided with a metal layer which is then provided with a water-insoluble resin, whereupon the metal layer printed with the resin layer is immersed in an aqueous alkaline or acidic solution to dissolve and remove the metal layer which does not coexist the resinous pattern is covered.
  • security elements for use as security elements for value documents, in particular banknotes, identity documents and the like, it is necessary that these security elements, for example in thread or tape form as inconspicuous as possible in the carrier, in particular paper or the like, can be integrated. Therefore, it is necessary to strive for the smallest possible thickness of the security elements. Furthermore, however, at the same time a great precision in the dimensions of the recesses to be produced is necessary to ensure sufficient security against counterfeiting, since irregularities in the dimensions of the recesses forming a coding make it difficult to clearly establish the authenticity or any imitation. Furthermore, it is sometimes also desirable to register corresponding coatings and codings on both sides of the carrier substrate of the security element in order to ensure a mutual identification of the authenticity.
  • the object of the invention is therefore to provide metallized films and a process for their preparation, which avoids the disadvantages described above and, in particular, due to the small thickness and high precision at the same time are particularly suitable as security elements to be integrated into value documents.
  • the invention therefore provides a selectively metallised film produced by a process of claims 1 to 10.
  • the subject matter is a process for the production of a selectively metallized film, characterized in that a carrier substrate in a first step, a solvent-soluble inking in the form of an inverse coding is applied to one or both sides of the carrier substrate, in a second step, this layer is treated by means of a corona or flame process, and in a third step, a functional layer of a material to be structured is applied, this layer consisting of metals, metal compounds or alloys and having a thickness of 0.001 to 50 ⁇ m, whereupon in a fourth step the paint application is removed by means of a solvent combined with a mechanical action, characterized in that the method steps 1 to 4 are carried out at least twice.
  • Encoding is understood below to mean characters, patterns, images, lines and the like.
  • carrier foils are preferably flexible plastic foils, for example, from Pl, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC in question.
  • the carrier films preferably have a thickness of 5 to 700 .mu.m, preferably 8 to 200 .mu.m, more preferably 12 to 50 .mu.m.
  • metal foils for example Al, Cu, Sn, Ni, Fe or stainless steel foils having a thickness of 5-200 ⁇ m, preferably 10 to 80 ⁇ m, particularly preferably 20-50 ⁇ m, may also serve as the carrier substrate.
  • the films can also be surface-treated, coated or laminated, for example, with plastics or painted.
  • carrier substrates also paper or composites with paper, for example, composites with plastics with a grammage 20-500 g / m 2, preferably 40-200 g / m 2. be used.
  • nonwovens such as continuous fiber webs, staple fiber webs and the like, which may optionally be needled or calendered, can be used as carrier substrates.
  • nonwovens consist of plastics, such as PP, PET, PA, PPS and the like, but it is also possible to use nonwovens of natural, optionally treated fibers, such as viscose fiber webs.
  • the nonwovens used have a basis weight of about 20 g / m 2 to 500 g / m 2 .
  • the lacquer layer can be, for example, an adhesive lacquer layer or a release-transfer lacquer layer, it can be thermally or reactively crosslinked or crosslinkable by radiation, for example UV radiation, or additional properties such as scratch resistant and / or antistatic equipment or chemical resistance.
  • radiation for example UV radiation
  • Both aqueous and solvent-based coating systems are suitable, in particular coating systems based on PE acrylate, PET acrylate, urethane acrylate, PVC, PMMA or epoxy acrylate.
  • the carrier substrate may be provided on one or both sides with a hot or cold seal adhesive or a self-adhesive coating.
  • plastic films and metal foils are particularly preferred, but nonwovens are also well suited for security features in textiles.
  • the surface of the carrier substrate may be structured or unstructured, or be embossed, for example, with micro- or macro-lines, that is to say two or three-dimensional structures may possibly be present on the surface.
  • the application of the paint can be done by any method, for example by gravure printing, flexographic printing, screen printing, digital printing and the like.
  • the color or lacquer used is soluble in a solvent, preferably water, but it is also possible to use a dye soluble in any solvent, for example in alcohol, esters and the like.
  • the color or the colored lacquer can be customary compositions based on natural or artificial macromolecules.
  • the soluble color may be pigmented or unpigmented.
  • pigments all known pigments can be used. Particularly suitable are TiO 2 , ZnS, kaolin and the like.
  • the printed carrier substrate is treated by means of a corona or flame process.
  • High-energy plasma for example Ar or Ar / O 2 plasma, cleans the surface of toning residues of the printing inks. The necessary sharp delimitation of the contours of the recesses, which is necessary for the necessary precision of the coding is achieved.
  • the surface is activated. In this case, terminal polar groups on the Surface generated. This improves the adhesion of metals and the like to the surface.
  • a thin metal or metal oxide layer can be applied as adhesion promoter, for example by sputtering or vapor deposition.
  • adhesion promoter particularly suitable are Cr, Al, Ag, Ti, Cu, TiO 2 , Si oxides or chromium oxides.
  • This adhesion promoter layer generally has a thickness of 0.1 nm to 5 nm, preferably 0.2 nm to 2 nm, particularly preferably 0.2 to 1 nm.
  • This layer consists of a metal, a metal compound, an alloy or an insulator.
  • the metal layer layers of Al, Cu, Fe, Ag, Au, Cr, Ni, Zn and the like are suitable.
  • suitable metal compounds are oxides or sulfides of metals, in particular TiO 2 , Cr oxides, ZnS, ZnO, Al 2 O 3 or silicon oxides.
  • Suitable alloys are, for example, Cu-Al alloys, Cu-Zn alloys and the like.
  • the radiation-curing can be, for example, by heat or UV radiation, suitable.
  • This functional layer may be applied by known methods such as sputtering, sputtering, printing (gravure, flexo, screen, digital printing and the like), spraying, electroplating and the like.
  • the Thickness of the functional layer is 0.001 to 50 ⁇ m, preferably 0.1 to 20 ⁇ m.
  • the color layer is removed by a suitable solvent, which is adapted to the composition of the color layer.
  • a suitable solvent which is adapted to the composition of the color layer.
  • the application of paint is preferably water-soluble.
  • the separation can be supported by mechanical action.
  • the functional layer or, if the method described is used several times, the respective functional layers can be applied over the entire surface or partially onto the carrier substrate, in particular the carrier foil.
  • the layers applied to each other may have different properties.
  • different properties of the individual layers for example layers having different conductivity, magnetizability, optical properties, absorption behavior and the like, it is possible to produce constructions for security elements with several precise authenticity features, for example.
  • the process steps can be repeated as often as desired, wherein, for example, in full-surface application of a functional layer of the paint can be omitted if necessary, the inline plasma, corona or Flame treatment may optionally be advantageous with simultaneous application of an adhesion promoter.
  • the coated film produced in this way can also be protected by a protective lacquer layer or further refined, for example, by laminating or the like.
  • the metallized films according to the invention are used in particular as security elements, in particular in value documents and data carriers, for example banknotes, securities, identity documents, cards and the like, or as security elements or security labels in packaging, textiles, seals and the like.
  • the films of the invention are particularly suitable for embedding in banknotes and the like.
  • the product can be applied with a sealable adhesive, such as a hot or cold seal adhesive to the appropriate substrate, or embedded in paper for security papers by conventional methods, for example.
  • sealants can be equipped with visible or visible in the UV light, fluorescent, phosphorescent or laser and IR radiation absorbing features to increase the security against counterfeiting.
  • These features may also be present in the form of patterns or characters or show color effects, in principle any number of colors, preferably 1 to 10 colors or color mixtures, are possible.
  • the carrier substrate may be removed after application or remain on the product in one-sided coating.
  • the carrier film may optionally be specially equipped on the uncoated side, for example, scratch-resistant, antistatic and the like. The same applies to a possible lacquer layer on the carrier substrate.
  • a water-soluble ink layer based on a thickness of 3 microns is applied by gravure, with recesses are provided in the form of letters.
  • the printed film is subjected to a low-pressure plasma process with Ar plasma and simultaneously applied a layer of Cr as a primer with a thickness of 0.3 nm. Then it is steamed with Al.
  • the layer thickness of the vapor-deposited layer is 0.2 ⁇ m.
  • the film is washed with water and thus the paint application is removed with the adhesion promoter on the paint application and the metal layer located in this area.
  • the finished product has a selective Al coating with a coding in the form of letters.
  • a water-soluble ink based on 9 wt% TiO 2 pigments with recesses in the form of defined lines is applied.
  • the printed film is subjected to a corona process and at the same time a layer of silicon dioxide is applied as a primer with a thickness of 0.3 nm.
  • the thus treated film is vapor-deposited with Cu, wherein the thickness of the layer is 0.5 microns.
  • the film is washed with water and thus the paint application is removed with the adhesion promoter on the paint application and the metal layer located in this area.
  • the film now has a selective metallic coating in the form of defined lines.
  • a film prepared according to Example 1 is subjected to a plasma treatment with Ar / O 2 plasma and then printed over the entire surface of a functional layer of a urethane coating system by gravure printing. Subsequently, the thus treated film is provided with a paint application with an alcohol-soluble ink with 10% ZnS as a pigment, wherein partially with the recesses of the first inking overlapping recesses are provided in the form of a pattern. Subsequently, the film is again subjected to a plasma treatment with Ar / O 2 plasma and simultaneously applied a 0.2 nm thick layer of chromium (III) oxide as a primer. Subsequently, a layer of Al is sprayed with a layer thickness of 0.2 microns. Subsequently, a washing process is carried out with alcohol, which in turn the paint application is replaced with the layers thereon.
  • the one film is produced analogously to Example 1, wherein, however, all the process steps described there are performed on both sides of the carrier film registration and registration.
  • the film thus produced is then provided with a protective lacquer layer with a fluorescent color in UV light.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)
  • Printing Methods (AREA)

Claims (12)

  1. Procédé de fabrication d'un film métallisé de façon sélective pour des éléments de sécurité, procédé, dans lequel, sur un substrat porteur,
    une couche de peinture soluble dans un solvant est appliquée au cours d'une première étape sous la forme d'un codage inverse sur une des deux faces d'un substrat porteur,
    cette couche de peinture est traitée selon le procédé corona ou à la flamme au cours d'une seconde étape,
    une couche fonctionnelle d'un matériau à structurer est appliquée au cours d'une troisième étape, cette couche étant constituée de métaux, de combinaisons de métaux ou d'alliages et présentant une épaisseur de 0,001 à 50 µm,
    la couche de peinture étant, par la suite, au cours d'une quatrième étape, enlevée au moyen d'un solvant combiné avec une action mécanique,
    caractérisé en ce que les étapes de procédé 1 à 4 sont exécutées au moins 2 fois.
  2. Procédé suivant la revendication 1, caractérisé en ce que simultanément avec le traitement corona ou à la flamme, une mince couche d'un agent d'adhérence est appliquée.
  3. Procédé suivant une des revendications 1 ou 2, caractérisé en ce que, comme agent d'adhérence, une couche d'un métal, d'un semi-métal ou de son oxyde d'une épaisseur de 0,1 à 5 nm est appliquée.
  4. Procédé suivant une des revendications 1 ou 3, caractérisé en ce que comme substrat porteur sont utilisés des films en matière artificielle ou des films support métalliques ou des non-tissés ou des papiers.
  5. Procédé suivant une des revendications 1 à 4, caractérisé en ce que comme couche de peinture sont utilisés une peinture soluble dans l'eau ou un vernis couleur soluble dans l'eau.
  6. Procédé suivant une des revendications 1 à 5, caractérisé en ce que, pour améliorer la détachabilité de la couche de peinture, est appliquée , en plus, sur toute la surface de celle-ci ou de manière adaptée avec précision, une mince couche de peinture pigmentée ou une couche de pigments pure.
  7. Procédé suivant une des revendications 1 à 6, caractérisé en ce que comme métal de la couche fonctionnelle sont utilisés Cu, Al, Fe, Ag, Au, Cr, Ni, Zn, comme combinaisons de métaux, TiO2, des oxydes de Cr, Zns, ZnO, Al2O3 et des oxydes de silicium et comme alliages, Cu-Al, ainsi que des alliages Cu-Zn.
  8. Procédé suivant une des revendications 1 à 7, caractérisé en ce que le substrat porteur reçoit un traitement anti-rayures ou antistatique sur la face non enduite.
  9. Procédé suivant une des revendications 1 à 8, caractérisé en ce que le substrat porteur est muni d'une couche de vernis adhérente ou d'une couche de vernis de transfert enlevable qui peut avoir reçu un traitement anti-rayures ou antistatique ou qui est pourvue, ensuite, d'un adhésif pour scellage à chaud ou à froid ou d'un revêtement autocollant sur une ou les deux faces.
  10. Procédé suivant une des revendications 1 à 9, caractérisé en ce que la surface du substrat porteur est structurée.
  11. Film métallisé de façon sélective, fabriqué selon un procédé suivant la revendication 1 à 10.
  12. Utilisation du film métallisé de façon sélective suivant la revendication 11, destiné à l'application sur un matériau porteur au moyen d'un adhésif pour scellage ou à l'enrobage dans un matériau porteur pendant le processus de fabrication de celui-ci.
EP02019580.6A 2001-09-05 2002-09-02 Procédé de préparation d'un feuille métallisée sélectivement, et le produit correspondant Expired - Lifetime EP1291463B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10143523A DE10143523B4 (de) 2001-09-05 2001-09-05 Verfahren zur Herstellung einer selektiv metallisierten Folie
DE10143523 2001-09-05

Publications (2)

Publication Number Publication Date
EP1291463A1 EP1291463A1 (fr) 2003-03-12
EP1291463B1 true EP1291463B1 (fr) 2014-12-10

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EP02019580.6A Expired - Lifetime EP1291463B1 (fr) 2001-09-05 2002-09-02 Procédé de préparation d'un feuille métallisée sélectivement, et le produit correspondant

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EP (1) EP1291463B1 (fr)
DE (1) DE10143523B4 (fr)

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ES2325805T3 (es) * 2000-10-09 2009-09-18 Hueck Folien Gesellschaft M.B.H. Lamina metalizada y procedimiento para su fabricacion, asi como su uso.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3337675B1 (fr) 2015-08-17 2019-11-13 Giesecke+Devrient Currency Technology GmbH Élément de sécurité, procédé de production de ce dernier et support de données équipé de l'élément de sécurité

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DE10143523A1 (de) 2003-03-27
EP1291463A1 (fr) 2003-03-12
DE10143523B4 (de) 2008-08-21

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