EP3363652A1 - Matériau de transfert d'éléments de sécurité et son procédé de fabrication - Google Patents

Matériau de transfert d'éléments de sécurité et son procédé de fabrication Download PDF

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Publication number
EP3363652A1
EP3363652A1 EP18000151.3A EP18000151A EP3363652A1 EP 3363652 A1 EP3363652 A1 EP 3363652A1 EP 18000151 A EP18000151 A EP 18000151A EP 3363652 A1 EP3363652 A1 EP 3363652A1
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EP
European Patent Office
Prior art keywords
layer
security element
recess
layers
carrier 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.)
Granted
Application number
EP18000151.3A
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German (de)
English (en)
Other versions
EP3363652B1 (fr
EP3363652B2 (fr
Inventor
Christian Fuhse
Josef Schinabeck
Björn Teufel
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Giesecke and Devrient Currency Technology GmbH
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Giesecke and Devrient Currency Technology GmbH
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Publication of EP3363652A1 publication Critical patent/EP3363652A1/fr
Publication of EP3363652B1 publication Critical patent/EP3363652B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/324—Reliefs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—Diffraction gratings; Holograms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/342—Moiré effects
    • 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
    • B42D25/346—Perforations
    • 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
    • B42D25/364—Liquid crystals
    • 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
    • B42D25/369—Magnetised or magnetisable materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/373—Metallic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/425—Marking by deformation, e.g. embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D25/455—Associating two or more layers using heat
    • 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
    • B42D25/46—Associating two or more layers using pressure
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
    • B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
    • B44C1/17—Dry transfer
    • B44C1/1712—Decalcomanias applied under heat and pressure, e.g. provided with a heat activable adhesive

Definitions

  • the invention relates to a security element transfer material, comprising: a security element laminate having a plurality of layers including at least one optically variable effect deploying feature layer and an adhesive layer, the feature layer being the layer following transfer of a security element a value document substrate faces a viewer; a carrier substrate detachably connected to the feature layer of the security element laminate; a mask layer having at least one recess, which is arranged so that the security element layer composite can be bonded in the region of the at least one recess of the mask layer by the action of pressure and optionally heat by means of the adhesive layer with the value document substrate and then detached from the carrier substrate, wherein in the area outside the at least one recess of the mask layer, adhesion of the security element layer composite to the value document substrate and subsequent detachment of the security element layer composite from the carrier substrate is prevented.
  • the invention further relates to methods for producing the security element transfer material.
  • Valuables such as branded goods or documents of value, in particular banknotes, are often provided with security elements which allow verification of the authenticity of the object of value and at the same time serve as protection against unauthorized reproduction.
  • the security elements used for this purpose are not individually, but in the form of transfer belts with a variety of as a transfer element provided trained security elements. Characteristic of transfer belts is that the security elements are prepared on a carrier layer, wherein the order of the layers of the transfer elements must be reversed, as it should be present later on the object to be protected.
  • the carrier layer is typically removed from the layer structure of the security elements during transfer.
  • the transfer tapes On the opposite side of the carrier layer, the transfer tapes have an adhesive layer, usually of a heat-sealing adhesive or heat-sealing lacquer, which melts during the transfer of the security elements and glued the security elements with the object to be secured.
  • the transfer tape is placed with the heat-seal adhesive layer on the object and pressed by means of a heated transfer punch or a transfer roller and transferred in the outline of the heated transfer punch on the object.
  • Transfer elements, transfer belts and the transfer of transfer elements to target substrates are for example in EP 0 420 261 B1 and the WO 2005/108108 A2 described.
  • transfer elements e.g. Do not tear off transfer patches cleanly at the edge of the heated area. This leads to unclean edges and possibly also to the fact that remains stuck to the transferred patches remnants of the film composite, which were torn from the layer composite in the non-bonded area. These residues are undesirable because they later dissolve and, in the form of impurities, undergo subsequent processing steps, e.g. Printing processes, affect.
  • the individual transfer elements can also already prefabricated on the transfer belt in the desired outline shape.
  • the prefabrication of separate individual security elements is useful, for example, if the security elements have a layer structure which makes exact separation of the entire layer structure during the transfer process difficult. This is the case, for example, when the layer structure of the security element to be transferred contains a permanent carrier substrate, for example a plastic film.
  • Carrier substrates within the layer structure of security elements are useful if the security elements must be made particularly stable, for example, if they must be self-supporting, because they should be used to close a through opening in the object to be secured. Depending on the object and size of the opening to be closed, high demands can be placed on the stability of the security elements.
  • Banknotes for example, are exposed to high stresses during their orbit, are tapped, kinked and possibly exposed to moisture.
  • the security elements must be able to withstand these stresses as well as the banknote paper itself, since otherwise there would be the danger that after a certain circulation time the through opening in the banknote would be exposed.
  • Security elements whose layer construction comprises a stable carrier substrate, typically a plastic film, must be present on a transfer material as prefabricated individual elements, which means that the outline shapes of the security elements in the security element material must be precut beforehand.
  • the pre-cutting can be carried out for example by means of a laser. This results in the problem that the depth of cut must be controlled very precisely, on the one hand the complete layer structure of On the other hand, cut the security material, which is separated during the transfer, not to injure.
  • support materials usually plastic films are used. Although plastic films have a high tear resistance, but a low tear resistance. When they are cut, it is almost unavoidable that the security element transfer material in the form of continuous material tears on valuables in some places during the transfer process of the security elements.
  • the layer structures to be cut or the carrier sheets which are not to be cut are materials with thicknesses in the micrometer range.
  • the security element laminates typically have thicknesses in the range of about 20 ⁇ m to 30 ⁇ m
  • the carrier foils typically have thicknesses in the range of 10 ⁇ m to 20 ⁇ m.
  • a security element transfer material in the form of a continuous material, pre-cut in the security elements in the desired contours, and the precut elements can then be transferred without risk of tearing of the carrier material on products to be secured, is known from WO 2010/031543 A1 known.
  • the security element transfer material is a continuous material, in particular a band of several hundred meters in length and a width of a few millimeters / centimeter to several meters.
  • the security element transfer material comprises a security element layer composite, ie the actual security element material, and a temporary carrier, ie the material on which the security elements are "stored".
  • the temporary carrier is based on a carrier layer composite, consisting of a first and a second temporary carrier substrate, which are permanently bonded by means of an adhesive layer.
  • the security element laminate is connected to a temporary support either directly or by means of a release layer.
  • the release layer is conventional and facilitates the detachment of the security elements from the temporary carrier during the transfer process to a valuable item.
  • the temporary support is located on the side of the security element layer composite facing an observer after the transmission of the security elements.
  • temporary carrier substrates expresses that, in contrast to the "permanent" carrier substrate, these carrier substrates are not part of the security elements.
  • the formation of the temporary carrier as a carrier layer composite avoids that when cutting the outline shapes of the security elements, the stability of the temporary carrier is impaired by cutting the temporary carrier.
  • a comparable result can not be achieved simply by making a single temporary carrier film thicker, since plastic films have a low resistance to tear propagation, ie if a film is even slightly cut, it easily tears further and possibly completely through.
  • the carrier layer composite consisting of a first and a second temporary carrier substrate, which are permanently bonded by means of an adhesive layer: even if one the temporary carrier substrate is completely severed, remains the other temporary carrier substrate (or possibly the other temporary carrier substrates) as a rule undamaged and therefore stable.
  • the adhesive also forms an additional "buffer zone" between the temporary carrier substrates.
  • the in the WO 2010/031543 A1 The method described is to de-mesh patch films before application.
  • the forms of the patch are punched with a punch into the layers to be transferred, ie the layers are pierced with the punch.
  • these layers are then peeled off in the areas outside the patch, while remaining in the patch areas on the carrier film. This ensures that the patches have clean edges after application.
  • a disadvantage of this method is that the layer structure must have sufficient stability for weeding, which can be done for example by introducing a stabilizing film layer. However, this is again associated with a thickness increase of the finished patch, which is undesirable in practice.
  • a transfer element e.g. a transfer patch
  • An observation in incident light is for the purposes of this invention an illumination of the value document from one side and a viewing of the value document from the same side.
  • a reflection in incident light is therefore present, for example, when the front of the document of value is illuminated and also viewed.
  • a reflection in transmitted light in the sense of this invention is a lighting of a value document from one side and a viewing of the value document from another side, in particular the opposite side.
  • a reflection in transmitted light is thus present, for example, when the back of the document of value illuminates and the front of the value document is considered. The light thus shines through the document of value.
  • value document In the case of a document of value within the meaning of the invention, it can be e.g. to trade banknotes or identity documents, but also shares, certificates, stamps, checks, tickets, tickets, air tickets, identity cards, visa stickers or the like, as well as labels, seals, packaging or other elements.
  • value document therefore always includes documents of the type mentioned below.
  • value document also includes security paper for the production of banknotes.
  • banknote includes in particular a paper banknote, a polymer banknote or a film composite banknote.
  • the security element to be transferred can in particular be a transfer patch or transfer label or a transfer strip or transfer thread.
  • the invention will be described in the following detailed description with reference to the example of a transfer patch, so it should not be construed as limited to a patch.
  • the functional layer can be a single (functional) layer or multiple (functional) layers.
  • shadow mask is also used herein.
  • Transfer patches find e.g. in the first series of EURO banknotes application, e.g. in the form of the hologram patch applied to the EURO 50 banknote.
  • the starting point is an ordinary transfer film structure, as e.g. also used for the application of transfer strips.
  • Such a construction is based on a carrier film, one or more functional layers located thereon, and a heat sealing lacquer layer.
  • the functional layers provide optically variable security features, e.g. Embossed holograms, micromirror elements, subwavelength structures, and the like.
  • the optically variable security features are typically provided by an embossing lacquer, e.g. a UV embossing lacquer, with microstructures embossed therein and a metallization present at least in some areas.
  • there are still other layers e.g. Protective lacquers or primers, which are then joined at the end of the heat sealing lacquer.
  • the heat sealing lacquer layer may actually consist of several layers of different lacquers.
  • the functional layers have only weak adhesion to the carrier film, which is e.g. can be achieved by poor adhesion of the embossing lacquer to the carrier film or by the introduction of a special separating layer.
  • a shadow mask is applied according to the invention.
  • the shadow mask can in particular be given by a perforated foil from which the shapes of the desired patches are punched out.
  • a perforated film is applied to the transfer film structure advantageously laminated or glued. This can be done with a laminating adhesive or simply by using the bond strength of the already existing heat sealing lacquer.
  • the side facing the heat sealing lacquer may be provided beforehand with a primer which allows a better bonding of perforated foil and functional layers.
  • Perforated film and functional layers can also be bonded only in certain areas. Theoretically, the perforated film can only be glued to the functional layers by the melting of the heat-sealing lacquer during application. In practice, however, it is advantageous to prevent slippage of the perforated film by adhering at least in regions.
  • micromirrors, hologram structures, subwavelength structures or (eg embedded) microlenses can be incorporated in the functional layers.
  • Microlenses may be present in particular in combination with microimages formed in a separate plane and in this way produce optically variable security features in the form of so-called moiré magnifier, modulo mapper, tilt images and the like.
  • On microlenses in combination with microimages based security features are for example from WO 2006/087138 A1 known. Micromirrors, hologram structures, etc.
  • an at least partially present metallization which may consist of a metal, for example Al or Ag, a high-index coating, eg ZnS or TiO 2 , or a color-shifting three-layer system reflector / dielectric / absorber (eg Al / SiO 2 / Cr structure).
  • a metal for example Al or Ag
  • a high-index coating eg ZnS or TiO 2
  • a color-shifting three-layer system reflector / dielectric / absorber eg Al / SiO 2 / Cr structure
  • Essential for the heat-sealing gel lacquer is that it ensures the desired adhesion at the end by the application by pressure and possibly elevated temperature. Due to the heat, it can melt and / or be activated. It may also be provided to subsequently heat seal the enamel, e.g. to be further treated by means of UV radiation (post-crosslinking).
  • the perforated foil is preferably as thin as possible. It can be used with advantage thicknesses in a range of 4.5 microns to 19 microns.
  • the film used is preferably a polyethylene terephthalate (PET) film.
  • PET polyethylene terephthalate
  • the carrier films used are preferably thicker films, for example a 19 ⁇ m thick PET film. In the embodiments in which punched into the functional layers by punching, something is usually also punched into the carrier film. It must be ensured that the carrier film does not tear after application of the patch to the (value-document) substrate.
  • a laminating compound consisting of two foils as is known from US Pat WO 2010/031543 A1 is known (for example, a 12 micron thick film and a 19 microns thick film, which are glued together): then only one of the two foils is punched while punching, while the second foil remains undamaged.
  • the carrier film may be advantageous to pull the carrier film over a sharp edge (or a wedge) from the rest of the layer composite.
  • the embossed structure which can be used according to the invention is embossed, in particular, into an embossing lacquer.
  • the term "optically variable effect” in addition to holograms also includes Hologram-like diffraction structures, so for example, structures that produce no defined image, but a blurry colored impression.
  • Also subsumed under the term “optically variable effect” are diffraction patterns, color shift effect structures, kinoforms, microlens effect structures, structures with isotropic or anisotropic scattering effects, or other interference effects, subwavelength structures, moth-eye structures, microlens structures, and microstructures for Moire Magnifier or Modulo Mapper , Micromirror structures and microprism structures.
  • a liquid crystal layer which shows a different color when viewed in reflected light as when viewed in transmitted light.
  • a different reflected-light / transmitted-light appearance can be achieved by combining the liquid-crystal layer with a relief structure, in particular a diffractive relief structure, a micro-optical relief structure or a sublambda structure.
  • a printing layer having an effect pigment composition which, when viewed in reflected light, exhibits a different color than when viewed in transmitted light in particular a gold / blue color change, a gold / violet color change, a green-gold / Magenta color change, violet / green color change, or silver / opaque color change.
  • Such inks are eg in the WO 2011/064162 A2 described.
  • a different reflected-light / transmitted-light appearance can be achieved by combining the printed layer with a relief structure, in particular a diffractive relief structure, a microoptical relief structure or a sublambda structure.
  • the relief structure forming a diffractive structure is in particular a hologram structure.
  • the dimensions of the structural elements of the diffractive structure are preferably on the order of the wavelength of light, more preferably in a range greater than 100 nm and less than 1 ⁇ m, with a range greater than 300 nm and less than 1 ⁇ m being particularly preferred.
  • the relief structure forming a micromirror arrangement is also referred to herein as a micro-optical relief structure.
  • the production of a micro-optical relief structure is known in the art (see, for example, the WO 2014/060089 A2 ).
  • the dimensions of the structural elements of the micromirror arrangement are preferably in a range which is greater than 1 ⁇ m and less than 40 ⁇ m, an area greater than 1 ⁇ m and less than 30 ⁇ m being particularly preferred.
  • the dimensions of the structural elements of the micromirror arrangement have, for example, a height of up to 15 ⁇ m and a height of up to 15 ⁇ m lateral extent up to 30 ⁇ m. In this case, both the height and the lateral extent of the structural elements of the micromirror arrangement are preferably greater than 1 ⁇ m.
  • micro-optical relief structures are, for example, from WO 2007/079857 A1 known.
  • the reflective microstructure is in the form of a mosaic of a plurality of reflective mosaic elements characterized by the parameters of size, outline, relief, reflectivity, and spatial orientation, and which form a predetermined motif by exposing incident light to various groups of mosaic elements having different characteristic parameters reflect different spatial areas, and in which the mosaic elements have a lateral dimension below the resolution limit of the eye.
  • Figures 1 and 2 illustrate the preparation of a transfer material according to the invention according to a first embodiment.
  • the transfer film structure is based on a carrier film 1, one or more functional layers 2 located thereon, and a heat sealing lacquer layer 3.
  • the functional layers 2 provide optically variable security features, eg embossed holograms, micromirror elements, subwavelength structures and the like.
  • the optically variable security features are generally provided by an embossing lacquer, for example a UV embossing lacquer, with microstructures embossed therein and metallization present at least in some areas.
  • the functional layers 2 have only a weak adhesion to the carrier film 1, which can be achieved, for example, by a poor adhesion of the embossing lacquer to the carrier film 1 or by the introduction of a special separating layer.
  • the perforated mask 4 may in particular be provided by a perforated foil from which the shapes of the desired patches are punched out.
  • a perforated film 4 is advantageously laminated onto the transfer film structure. This can be done with an additional laminating adhesive (in the FIG. 2 Not shown) or simply by using the bond strength of the already existing heat-sealing lacquer 3.
  • the heat-sealing lacquer 3 facing side may be previously provided with a primer, which allows a better bonding of perforated film 4 and functional layers 2. Hole film 4 and functional layers 2 can also be glued only partially.
  • FIGS. 3 and 4 illustrate the application of a transfer patch according to the first embodiment on a value document substrate, in the present example, a security paper for the production of banknotes.
  • the patch is heated as usual, wherein the heat-sealing lacquer 3 melts and glued to the paper substrate 5 (see FIG. 3 ).
  • the heating can be carried out in regions (ie in an area which is slightly larger than the patch itself) or over the entire area.
  • the film assembly 6 is then separated, the film assembly 6 from the paper substrate 5.
  • the functional layers 2 remain in the patch area on the paper substrate 5, since the heat sealant 3 to the paper 5 provides greater adhesion than the adhesion between the carrier film 1 and Functional layers 2.
  • the functional layers 2 remain on the carrier foil 1.
  • FIGS. 5 to 8 illustrate the preparation of a transfer material according to the invention according to a second embodiment.
  • the transfer film structure is based on a carrier film 7, one or more functional layers 8 located thereon and a heat sealing lacquer layer 9.
  • the functional layers 8 provide optically variable security features, eg embossed holograms, micromirror elements, subwavelength structures and the like.
  • the optically variable security features are generally provided by an embossing lacquer, for example a UV embossing lacquer, with microstructures embossed therein and metallization present at least in some areas.
  • the functional layers 8 have only a weak adhesion to the carrier film 7, which can be achieved, for example, by a poor adhesion of the embossing lacquer to the carrier film 7 or by the introduction of a special separating layer.
  • the transfer laminate shown in the areas outside the later patch is provided with a laminating adhesive 10 (the laminating adhesive 10, however, is not absolutely necessary; alternatively, the already existing heat-sealing lacquer 9 could be regionally melted or activated) and then glued to a film 11. Due to the positioning tolerances of bonding and punching cut, it is advantageous to let the bond end with sufficient distance from the patch.
  • the patch shapes are punched out (the solid lines 12 illustrate the punching tool) and the film 11 is removed in the areas of the holes, for example by means of compressed air or by pulling over a sharp edge.
  • a significant advantage of this variant is that after application to the value document substrate, the patches do not have to be torn out of the functional layer composite (ie a break must occur within the functional layers), but the functional layers at the patch edge are already severed cleanly by punching (see the in the FIG. 8 dashed lines shown 13). This leads to very clean patch edges.
  • FIGS. 9 and 10 illustrate the application of the transfer patch according to the second embodiment of a value document substrate, in the present example, a security paper for the production of banknotes.
  • the patch is heated as usual, wherein the heat-sealing lacquer 9 melts and glued to the paper substrate 14 (see FIG. 9 ).
  • the heating can be carried out in regions (ie in an area which is slightly larger than the patch itself) or over the entire area.
  • the functional layers 8 remain in the patch area on the paper substrate 14, since the heat sealing lacquer 9 to the paper 14 for a stronger adhesion than the adhesion between the carrier film 7 and functional layers 8. In the area outside the patch, the functional layers 8 remain on the carrier film. 7

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Finance (AREA)
  • Accounting & Taxation (AREA)
  • Business, Economics & Management (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Credit Cards Or The Like (AREA)
EP18000151.3A 2017-02-17 2018-02-15 Matériau de transfert d'éléments de sécurité et son procédé de fabrication Active EP3363652B2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017001598.8A DE102017001598A1 (de) 2017-02-17 2017-02-17 Sicherheitselement-Transfermaterial und Verfahren zum Herstellen desselben

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EP3363652A1 true EP3363652A1 (fr) 2018-08-22
EP3363652B1 EP3363652B1 (fr) 2021-04-07
EP3363652B2 EP3363652B2 (fr) 2024-02-28

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3789207A1 (fr) * 2019-09-04 2021-03-10 Giesecke+Devrient Currency Technology GmbH Papier de sécurité et document de sécurité protégés contre la coupure
EP4050387A4 (fr) * 2019-10-23 2023-11-22 Zeon Corporation Matière et joint de transfert de couche durcie de cristaux liquides et procédé d'évaluation de l'authenticité d'un joint de transfert de couche durcie de cristaux liquides

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019008642A1 (de) * 2019-12-13 2021-06-17 Giesecke+Devrient Currency Technology Gmbh Verfahren zur Herstellung von plättchenförmigen Effektpigmenten

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EP0420261B1 (fr) 1989-09-28 1999-03-24 GAO Gesellschaft für Automation und Organisation mbH Support d'information avec élément optique variable et son procédé de fabrication
WO2005108108A2 (fr) 2004-04-30 2005-11-17 Giesecke & Devrient Gmbh Element de securite et son procede de production
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WO2007079857A1 (fr) 2005-12-23 2007-07-19 Henkel Kommanditgesellschaft Auf Aktien Fixation de parfums a partir d'agents de lavage et de nettoyage sur des surfaces dures ou souples
WO2009149831A2 (fr) 2008-06-12 2009-12-17 Giesecke & Devrient Gmbh Élément de sécurité à élément à variation optique
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WO2011064162A2 (fr) 2009-11-27 2011-06-03 Basf Se Compositions de revêtement destinées à des éléments de sécurité et à des hologrammes
WO2011082761A1 (fr) 2009-12-14 2011-07-14 Giesecke & Devrient Gmbh Elément à couche mince de couleur dorée présentant une structure multicouche
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WO2014060089A2 (fr) 2012-10-16 2014-04-24 Giesecke & Devrient Gmbh Motif surfacique optiquement variable

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GB9203568D0 (en) 1992-02-20 1992-04-08 Amblehurst Ltd Transfer method and device
US20090250158A1 (en) 2005-10-27 2009-10-08 Christina Streb Method for Transferring a Multilayer Body and a Transfer Film
DE102011117044B4 (de) 2011-10-27 2019-05-29 Bundesdruckerei Gmbh Sicherheitselement
DE102013007484A1 (de) 2013-04-29 2014-10-30 Giesecke & Devrient Gmbh Optisch variables Sicherheitselement

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US4246307A (en) * 1977-12-23 1981-01-20 Trautwein Hansjoerg Tamper-proof laminated sticker or card
EP0420261B1 (fr) 1989-09-28 1999-03-24 GAO Gesellschaft für Automation und Organisation mbH Support d'information avec élément optique variable et son procédé de fabrication
WO2005108108A2 (fr) 2004-04-30 2005-11-17 Giesecke & Devrient Gmbh Element de securite et son procede de production
WO2006087138A1 (fr) 2005-02-18 2006-08-24 Giesecke & Devrient Gmbh Element de securite et procede de production de cet element
WO2007079857A1 (fr) 2005-12-23 2007-07-19 Henkel Kommanditgesellschaft Auf Aktien Fixation de parfums a partir d'agents de lavage et de nettoyage sur des surfaces dures ou souples
WO2009149831A2 (fr) 2008-06-12 2009-12-17 Giesecke & Devrient Gmbh Élément de sécurité à élément à variation optique
WO2010031543A1 (fr) 2008-09-17 2010-03-25 Giesecke & Devrient Gmbh Matériau de transfert d'élément de sécurité à support multicouche
WO2010072339A2 (fr) * 2008-12-16 2010-07-01 Ovd Kinegram Ag Procédé de fabrication d'un élément de sécurité et film de transfert
WO2011064162A2 (fr) 2009-11-27 2011-06-03 Basf Se Compositions de revêtement destinées à des éléments de sécurité et à des hologrammes
WO2011082761A1 (fr) 2009-12-14 2011-07-14 Giesecke & Devrient Gmbh Elément à couche mince de couleur dorée présentant une structure multicouche
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Publication number Priority date Publication date Assignee Title
EP3789207A1 (fr) * 2019-09-04 2021-03-10 Giesecke+Devrient Currency Technology GmbH Papier de sécurité et document de sécurité protégés contre la coupure
EP4050387A4 (fr) * 2019-10-23 2023-11-22 Zeon Corporation Matière et joint de transfert de couche durcie de cristaux liquides et procédé d'évaluation de l'authenticité d'un joint de transfert de couche durcie de cristaux liquides

Also Published As

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DE102017001598A1 (de) 2018-08-23
EP3363652B1 (fr) 2021-04-07
EP3363652B2 (fr) 2024-02-28

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