EP3363652B2 - 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
EP3363652B2
EP3363652B2 EP18000151.3A EP18000151A EP3363652B2 EP 3363652 B2 EP3363652 B2 EP 3363652B2 EP 18000151 A EP18000151 A EP 18000151A EP 3363652 B2 EP3363652 B2 EP 3363652B2
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EP
European Patent Office
Prior art keywords
layer
security element
layers
cutout
composite
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German (de)
English (en)
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EP3363652B1 (fr
EP3363652A1 (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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    • 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 layer composite which has a plurality of layers, which include at least one feature layer that has an optically variable effect and an adhesive layer, the feature layer being the layer that is applied after a security element has been transferred a value document substrate faces a viewer; a carrier substrate which is separably connected to the feature layer of the security element layer composite; a mask layer having at least one recess, which is designed such that the security element layer composite is bonded to the value document substrate in the area of the at least one recess in the mask layer by the action of pressure and, if necessary, heat using the adhesive layer and can then be detached from the carrier substrate, in the area Outside the at least one recess in the mask layer, sticking 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.
  • Valuable items such as branded items or valuable documents, especially banknotes, are often equipped with security elements that allow the authenticity of the valuable item to be checked and at the same time serve as protection against unauthorized reproduction.
  • the security elements used for this are often not provided individually, but in the form of transfer tapes with a large number of security elements designed as transfer elements.
  • a characteristic feature of transfer tapes is that the security elements are prepared on a carrier layer, whereby the order of the layers of the transfer elements must be reversed to that which will later be present on the object to be protected. During transfer, the carrier layer is typically removed from the layer structure of the security elements.
  • the transfer tapes On the side opposite the carrier layer, the transfer tapes have an adhesive layer, usually made of a heat-sealing adhesive or heat-sealing varnish, which melts during the transfer of the security elements and bonds the security elements to the object to be secured.
  • the transfer tape is placed on the object with the heat-sealing adhesive layer and pressed using a heated transfer stamp or a transfer roller and transferred to the object in the outline shape of the heated transfer stamp.
  • Transfer elements, transfer belts and the transfer of transfer elements on target substrates are, for example, in the EP 0 420 261 B1 and the WO 2005/108108 A2 described.
  • transfer elements e.g. transfer patches
  • transfer elements do not tear off cleanly at the boundary of the heated area. This leads to unclean edges and possibly also to the fact that remnants of the film composite that have been torn from the layer composite in the non-glued area get stuck on the transferred patches. These residues are undesirable because they later dissolve and impair subsequent processing steps, e.g. printing processes, in the form of contamination.
  • the individual transfer elements can also be prefabricated on the transfer belt in the desired outline shape.
  • the prefabrication of separate individual security elements makes sense, for example, if the security elements have a layer structure that makes it difficult to precisely cut through the entire layer structure during the transfer process. This is the case, for example, if 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 have to be made particularly stable, for example if they have to be self-supporting because they are to be used to close a through opening in the object to be secured.
  • Security elements whose layer structure includes 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 must be pre-cut in the security element material.
  • the pre-cutting can be carried out using a laser, for example.
  • the problem that arises is that the cutting depth must be controlled very precisely in order, on the one hand, to cut through the entire layer structure of the security element, but on the other hand not to injure the carrier material that is separated during the transfer.
  • Plastic films are usually used as carrier materials. Although plastic films have a high tear resistance, they have a low tear resistance. If they are cut, it can hardly be avoided that the security element transfer material, which is in the form of an endless material, tears in some places during the transfer process of the security elements to valuables. It must also be taken into account that the layer structures to be cut or the carrier films not to be cut are materials with thicknesses in the micrometer range.
  • the security element layer structures typically have thicknesses in the range of approximately 20 ⁇ m to 30 ⁇ m, and the carrier films typically have thicknesses in the range of 10 ⁇ m to 20 ⁇ m. Given the precision required here, it is problematic to carry out a cutting process in such a way that the security element layer composite is completely severed, but the cutting process is stopped in time so that the carrier film is not cut anywhere. However, due to the partially cut carrier film, the security element transfer material loses stability and may even tear, which is why precise and smooth application of the security elements made of the endless material to the products to be protected is no longer guaranteed.
  • a security element transfer material in the form of a continuous material in which security elements are pre-cut in the desired outline shapes, and the pre-cut elements can then be transferred to products to be secured without the risk of tearing of the carrier material is from the WO 2010/031543 A1 known.
  • the security element transfer material is an endless material, in particular a band with a length of several hundred meters and a width of a few millimeters/centimeters to several meters.
  • the security element transfer material has a security element layer composite, ie the actual security element material, and a temporary carrier, ie the material on which the security elements are "stocked".
  • the temporary carrier is based on a carrier layer composite, consisting of a first and a second temporary carrier substrate, which are permanently bonded using an adhesive layer.
  • the security element layer composite is connected to a temporary carrier either directly or by means of a release layer.
  • the release layer is of a conventional type and facilitates the detachment of the security elements from the temporary carrier during the transfer process valuable item.
  • the temporary carrier is located on the side of the security element layer composite, which faces a viewer after the security elements have been transferred.
  • temporary carrier substrates expresses the fact that, in contrast to the “permanent” carrier substrate, these carrier substrates are not part of the security elements.
  • the design of the temporary carrier as a carrier layer composite prevents the stability of the temporary carrier from being impaired by cutting the temporary carrier when cutting the outline shapes of the security elements.
  • a comparable result cannot be achieved simply by making a single temporary carrier film correspondingly thicker, since plastic films have a low resistance to tearing, that is, if a film is cut even slightly, it will easily tear further and, under certain circumstances, completely.
  • the carrier layer composite consisting of a first and a second temporary carrier substrate, which are inextricably bonded by means of an adhesive layer: even if one of the temporary carrier substrates is completely severed, the further temporary carrier substrate (or, if applicable, the further temporary carrier substrates) generally remains undamaged and therefore stable.
  • the adhesive also forms an additional “buffer zone” between the temporary carrier substrates.
  • the ones in the the WO 2010/ 031543 A1 The method described consists of weeding patch films before application. To do this, the shapes of the patch are punched into the layers to be transferred using a punch, ie the layers are broken through with the punch. During weeding, these layers are then removed in the areas outside the patch, while they remain on the carrier film in the patch areas. This ensures that the patches have clean edges after application.
  • a disadvantage of this process 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 an increase in the thickness of the finished patch, which is undesirable in practice.
  • the WO 2010/072339 A2 and the WO 2012/164011 A1 each describe a method for producing a security element and a transfer film.
  • the invention is based on the object of providing a method for transferring a transfer element, for example a transfer patch, in which, on the one hand, a small thickness of the finished patch and, on the other hand, a reliable transfer of the patch with clean edges can be achieved.
  • the carrier substrate of the security element transfer material is in particular a film.
  • the carrier substrate of the security element transfer material can also be a carrier layer composite, consisting of a first film and a second film, which are permanently bonded using an adhesive layer.
  • viewing in incident light means illuminating the document of value from one side and viewing the document of value from the same side Page. Viewing in incident light occurs, for example, when the front of the document of value is illuminated and also viewed.
  • viewing in transmitted light means illuminating a document of value from one side and viewing the document of value from another side, in particular the opposite side.
  • Viewing in transmitted light occurs, for example, when the back of the document of value is illuminated and the front of the document of value is viewed. The light thus shines through the document of value.
  • a document of value within the meaning of the invention can be, for example, banknotes or identification documents, but also stocks, certificates, stamps, checks, admission tickets, tickets, airline tickets, ID cards, visa stickers or the like, as well as labels, seals, packaging or other elements.
  • the simplified term “document of value” therefore always includes documents of the type mentioned below.
  • the term document of value 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 transfer element i.e. the security element to be transferred
  • the invention is described in the following detailed description using the example of a transfer patch and is therefore not to be construed as being 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 are used, for example, in the first series of EURO banknotes, e.g. in the form of the hologram patch applied to the EURO 50 banknote.
  • a transfer material can be realized according to the following preferred embodiment:
  • the starting point is a normal transfer film structure, such as the one used for applying transfer strips.
  • a structure is based on a carrier film, one or more functional layers on it and a heat-sealing lacquer layer.
  • the functional layers provide optically variable security features, for example embossed holograms, micromirror elements, subwavelength structures and the like.
  • the optically variable security features are usually provided by an embossing varnish, e.g. a UV embossing varnish, with microstructures embossed therein and metallization present at least in some areas.
  • the heat seal lacquer layer can actually consist of several layers of different lacquers.
  • the functional layers have only weak adhesion to the carrier film, which can be achieved, for example, by poor adhesion of the embossing varnish to the carrier film or by introducing a special separating layer.
  • a shadow mask is applied to the transfer film structure mentioned above.
  • the perforated mask can in particular be provided by a perforated film from which the shapes of the desired patches are punched out.
  • a perforated film is advantageously laminated or glued onto the transfer film structure. This can be done with a laminating adhesive or simply by using the adhesive power of the existing heat sealing lacquer.
  • the side facing the heat sealing lacquer can advantageously be provided with a primer beforehand, which enables better bonding of the perforated film and functional layers.
  • Perforated film and functional layers can also only be glued in certain areas. Theoretically, the perforated film can only stick to the functional layers when the heat sealing lacquer melts during application. In practice, however, it is advantageous to prevent the perforated film from slipping by gluing it at least in certain areas.
  • the patch is heated as usual, whereby the heat sealing lacquer melts and sticks to the (value document) substrate.
  • the (document of value) substrate can be, for example, a paper or polymer substrate or a paper/polymer composite substrate.
  • the heating can take place in certain areas (i.e. in an area that is slightly larger than the patch itself) or over the entire area. If you then separate the film structure from the (value document) substrate, the functional layers remain in the patch area on the (value document) substrate, since the heat sealing lacquer to the paper ensures a stronger adhesion than the adhesion between the carrier film and functional layers. In the area outside the patch, the functional layers remain on the carrier film.
  • the corresponding film can also be perforated only after lamination.
  • the film is only glued to the transfer film in the areas outside of the later patch (by melting or activating the heat sealing lacquer or using a laminating adhesive applied in areas). Due to the positioning tolerances of bonding and punching-cutting, it is advantageous to end the bonding with sufficient distance from the patch.
  • the patch shapes are then punched out and the film in the areas of the holes is removed, for example using compressed air or by pulling over a sharp edge.
  • a significant advantage of this variant is that the patches do not have to be torn out of the functional layer composite after application to the (value document) substrate (i.e. a break must occur within the functional layers), but the functional layers on the edge of the patch are already clean by punching are severed. This results in very clean patch edges.
  • micromirrors, hologram structures, subwavelength structures or (eg embedded) microlenses can be incorporated into the functional layers.
  • Microlenses can be present in particular in combination with microimages formed in a separate plane and in this way generate optically variable security features in the form of so-called Moire magnifiers, modulo mappers, tilt images and the like.
  • Security features based on microlenses in combination with microimages are, for example, from WO 2006/087138 A1 known.
  • Micromirrors, hologram structures, etc. are usually coated with a metallization that is present at least in some areas, which can consist of a metal, e.g. Al or Ag, a high-refractive index coating, e.g. ZnS or TiO2, or a color-shifting three-layer system reflector/dielectric/absorber (e.g. an Al/SiO2/Cr -Construction).
  • a metal e.g. Al or Ag
  • a high-refractive index coating e.g. ZnS or TiO2
  • a color-shifting three-layer system reflector/dielectric/absorber e.g. an Al/SiO2/Cr -Construction
  • heat seal gel varnish is that at the end it ensures the desired bonding through pressure and, if necessary, increased temperature.
  • the heat can cause it to melt and/or be activated. It can also be provided that the heat sealing lacquer is then post-treated, for example using UV radiation (post-crosslinking).
  • the perforated film is preferably as thin as possible. Films with thicknesses in a range from 4.5 ⁇ m to 19 ⁇ m can advantageously be used.
  • a foil preferably a polyethylene terephthalate (PET) film is used.
  • PET polyethylene terephthalate
  • Thicker films are preferably used as carrier films, for example a 19 ⁇ m thick PET film.
  • the carrier film used is not a single carrier film, but rather a laminating composite consisting of two films, as described in WO 2010/031543 A1 is known (e.g.
  • embossing structure that can be used according to the invention is in particular embossed into an embossing varnish.
  • the term “optically variable effect” includes not only holograms but also hologram-like diffraction structures, for example structures that do not produce a defined image but rather a blurry colored impression.
  • optically variable effect are diffraction patterns, structures with a color shift effect, kinoforms, structures with a microlens effect, structures with isotropic or anisotropic scattering effects or with other interference effects, subwavelength structures, moth-eye structures, microlens structures and microstructures for moire magnifiers or modulo mappers , micromirror structures and microprism structures.
  • the interference-capable, multi-layer structure that can be seen when the front side is viewed in reflected light and a second appearance of the interference-capable, multi-layer structure that can be seen when the front side is viewed in transmitted light, for example through recesses in the reflective layer and/or the semi-transparent layer Layer.
  • a film security element with different reflected light/transmitted light appearance is from the WO 2009/149831 A2 known.
  • the semi-transparent layer can have a large number of recesses arranged in a grid-like manner, which as a whole form a character, an image or a pattern. The pattern created in this way is visible in reflected light and disappears in transmitted light.
  • a different reflected light/transmitted light appearance of the multilayer structure can be achieved be that the structure is combined with a relief structure, in particular a diffractive relief structure, a micro-optical relief structure or a sublambda structure.
  • Further preferred reflective embossed structures contain, for example, a liquid crystal layer which, when viewed in reflected light, shows a different color than 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.
  • Further preferred reflective embossed structures contain, for example, a print layer with an effect pigment composition which, when viewed in reflected light, shows 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, a violet/green color change or a silver/opaque color change.
  • a print layer with an effect pigment composition which, when viewed in reflected light, shows 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, a violet/green color change or a silver/opaque color change.
  • Such printing inks are used, for example, in the WO 2011/064162 A2 described.
  • a different reflected light/transmitted light appearance can be achieved by combining the print layer with a relief structure, in particular a diffractive relief structure, a micro-optical
  • 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 in the order of magnitude of the light wavelength, more preferably in a range that is 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, WO 2014/060089 A2 ).
  • the dimensions of the structural elements of the micromirror arrangement are preferably in a range that is larger than 1 ⁇ m and less than 40 ⁇ m, with a range larger 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 lateral extent of up to 30 ⁇ m. 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 has the form of a mosaic made up of a large number of reflective mosaic elements, which are characterized by the parameters size, outline shape, relief shape, reflectivity and spatial orientation and which form a predetermined motif by different groups of mosaic elements with different characteristic parameters incident light 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 production of a transfer material according to the invention according to a first exemplary embodiment.
  • a transfer film structure is initially provided.
  • 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, for example embossed holograms, micromirror elements, subwavelength structures and the like.
  • the optically variable security features are generally provided by an embossing varnish, for example a UV embossing varnish, with microstructures embossed therein and a metallization present at least in some areas.
  • the functional layers 2 have only weak adhesion to the carrier film 1, which can be achieved, for example, by poor adhesion of the embossing varnish to the carrier film 1 or by introducing a special separating layer.
  • a shadow mask 4 is applied to the transfer film structure shown.
  • the perforated mask 4 can in particular be provided by a perforated film from which the shapes of the desired patches are punched out.
  • Such a perforated film 4 is advantageously laminated onto the transfer film structure. This can be done with an additional laminating adhesive (in the Figure 2 not shown) or simply by using the adhesive strength of the already existing heat sealing lacquer 3.
  • the side facing the heat sealing lacquer 3 can advantageously be provided with a primer beforehand, which enables better bonding of the perforated film 4 and functional layers 2.
  • Perforated film 4 and functional layers 2 can also only be glued in certain areas.
  • Figures 3 and 4 illustrate the application of a transfer patch according to the first exemplary embodiment to a value document substrate, in the present example a security paper for the production of banknotes.
  • the patch is heated as usual, whereby the heat sealing lacquer 3 melts and sticks to the paper substrate 5 (see Figure 3 ).
  • the heating can take place in areas (ie in an area that is slightly larger than the patch itself) or over the entire area.
  • the film structure 6 is then separated from the paper substrate 5.
  • the functional layers 2 thus remain in the patch area on the paper substrate 5, since the heat sealing lacquer 3 to the paper 5 ensures a stronger adhesion than the adhesion between the carrier film 1 and functional layers 2. In the area Outside the patch, the functional layers 2 remain on the carrier film 1.
  • Figures 5 to 8 illustrate the production of a transfer material according to the invention according to a second exemplary embodiment.
  • a transfer film structure is initially provided.
  • 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, for example embossed holograms, micromirror elements, subwavelength structures and the like.
  • the optically variable security features are generally provided by an embossing varnish, for example a UV embossing varnish, with microstructures embossed therein and a metallization present at least in some areas.
  • the functional layers 8 have only weak adhesion to the Carrier film 7, which can be achieved, for example, by poor adhesion of the embossing varnish to the carrier film 7 or by introducing a special separating layer.
  • a significant advantage of this variant is that the patches do not have to be torn out of the functional layer composite after application to the value document substrate (i.e. a break must occur within the functional layers), but rather the functional layers at the edge of the patch are already cleanly severed by punching (see the ones in the Figure 8 Punching lines 13 shown in dashed lines). This results in very clean patch edges.
  • Figures 9 and 10 illustrate the application of the transfer patch according to the second exemplary embodiment to a value document substrate, in the present example a security paper for the production of banknotes.
  • the patch is heated as usual, whereby the heat sealing lacquer 9 melts and sticks to the paper substrate 14 (see Figure 9 ).
  • the heating can take place in areas (ie in an area that is slightly larger than the patch itself) or over the entire area.
  • the film structure 15 is then separated from the paper substrate 14.
  • the functional layers 8 thus remain in the patch area on the paper substrate 14, since the heat sealing lacquer 9 to the paper 14 ensures 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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Claims (8)

  1. Matériau de transfert pour élément de sécurité, comprenant
    un composite de couches pour élément de sécurité, ayant une pluralité de couches à laquelle appartiennent au moins une couche caractéristique (2, 8) déployant un effet optiquement variable et une couche de colle (3, 9), cependant que la couche caractéristique est la couche qui, après une transposition d'un élément de sécurité sur un substrat pour document de valeur, est tournée vers un observateur ; et
    un substrat porteur (1, 7) joint de manière séparable à la couche caractéristique (2, 8) du composite de couches pour élément de sécurité ;
    une couche de masquage (4, 11) comprenant au moins un évidement, laquelle est telle que le composite de couches pour élément de sécurité, dans la zone du au moins un évidement de la couche de masquage (4, 11), par l'effet de pression et éventuellement de chaleur, peut être collé avec le substrat pour document de valeur (5, 14) au moyen de la couche de colle (3, 9) et ensuite détaché du substrat porteur (1, 7), cependant que, dans la zone à l'extérieur du au moins un évidement de la couche de masquage (4, 11), un collage du composite de couches pour élément de sécurité avec le substrat pour document de valeur (5, 14) et un détachement subséquent du composite de couches pour élément de sécurité du substrat porteur (1, 7) est empêché,
    caractérisée en ce que la couche de masquage (4, 11) est constituée par une feuille.
  2. Matériau de transfert pour élément de sécurité selon la revendication 1, cependant que la couche caractéristique (2, 8) déployant un effet optiquement variable repose sur une structure gaufrée réfléchissante.
  3. Matériau de transfert pour élément de sécurité selon la revendication 2, cependant que la structure gaufrée réfléchissante est telle que suit : (a) une structure diffractive réfléchissante ou (b) une microstructure réfléchissante sous forme d'une mosaïque en une pluralité d' éléments de mosaïque réfléchissants qui sont caractérisés par les paramètres taille, forme de contours, forme de relief, réflectivité et orientation spatiale et qui constituent un motif prédéterminé, ce qui a lieu en ce que différents groupes d'éléments de mosaïque ayant différents paramètres caractéristiques réfléchissent de la lumière incidente dans différentes zone spatiales, et dans lequel les éléments de mosaïque ont une dimension latérale en-dessous de la limite de résolution de l'oeil humain.
  4. Matériau de transfert pour élément de sécurité selon la revendication 2 ou 3, cependant que la structure gaufrée réfléchissante (i) comporte comme couches de réflexion des couches opaques de métal, ou comporte (ii) comme couches de réflexion des couches transparentes à indice de réfraction élevé, ou comporte (iii) comme couches de réflexion des éléments en couche mince à effet de changement des couleurs par basculement, en particulier avec une couche réfléchissante et une couche semi-transparente et une couche diélectrique agencée entre elles, ou comporte (iv) comme couches de réflexion des couches en matériau cristaux liquides, en particulier en matériau cristaux liquides cholestérique, ou comporte (v) comme couches de réflexion des couches imprimées sur la base de compositions de pigments à effets à effet dépendant de l'angle d'observation ou à couleurs différentes lors d'une observation en lumière incidente et lors d'une observation en lumière transmise, ou comporte (vi) comme couches de réflexion la disposition multicouche suivante : deux couches semi-transparentes et une couche diélectrique agencée entre les deux couches semi-transparentes, cependant que la disposition multicouche présente, lors d'une observation en lumière incidente d'une part, et lors d'une observation en lumière transmise d'autre part, différentes teintes.
  5. Procédé de fabrication d'un matériau de transfert pour élément de sécurité selon une des revendications de 1 à 4, comprenant
    a) la mise à disposition d'un substrat porteur (1, 7)
    b) le placement, sur le substrat porteur (1, 7), d'un composite de couches pour élément de sécurité ayant une pluralité de couches à laquelle appartiennent au moins une couche caractéristique (2, 8) déployant un effet optiquement variable et une couche de colle (3, 9), cependant que la couche caractéristique (2, 8) est la couche qui, après une transposition d'un élément de sécurité sur un substrat pour document de valeur, est tournée vers un observateur, cependant que le substrat porteur (1, 7) est joint de manière séparable à la couche caractéristique (2, 8) du composite de couches pour élément de sécurité ;
    c) la mise a disposition distincte d'une couche de masquage (4, 11) comprenant au moins un évidement ;
    d) le collage de la couche de masquage avec le composite de couches pour élément de sécurité obtenu à l'étape b), de telle sorte qu'un matériau de transfert pour élément de sécurité est obtenu, dans lequel le composite de couches pour élément de sécurité, dans la zone du au moins un évidement de la couche de masquage (4, 11), par l'effet de pression et éventuellement de chaleur, peut être collé avec un substrat pour document de valeur au moyen de la couche de colle (3, 9) et ensuite détaché du substrat porteur (1, 7), cependant que, dans la zone a l'extérieur du au moins un un évidement de la couche de masquage (4, 11), un collage du composite de couches pour élément de sécurité avec le substrat pour document de valeur et un détachement subséquent du composite de couches pour élément de sécurité du substrat porteur (1, 7) est empêché.
  6. Procédé de fabrication d'un matériau de transfert pour élément de sécurité selon une des revendications de 1 à 4, comprenant
    a) la mise a disposition d'un substrat porteur (1, 7)
    b) le placement, sur le substrat porteur (1, 7), d'un composite de couches pour élément de sécurité ayant une pluralité de couches à laquelle appartiennent au moins une couche caractéristique (2, 8) déployant un effet optiquement variable et une couche de colle (3, 9), cependant que la couche caractéristique (2, 8) est la couche qui, après une transposition d'un élément de sécurité sur un substrat pour document de valeur, est tournée vers un observateur, cependant que le substrat porteur est joint de manière séparable à la couche caractéristique (2, 8) du composite de couches pour élément de sécurité ;
    c) l'application d'une feuille adaptée à la génération d'une couche de masquage (4, 11) comportant au moins un évidement sur le composite de couches pour élément de sécurité obtenu à l'étape b), cependant que la feuille est collée au composite de couches pour élément de sécurité seulement dans la zone à l'extérieur du au moins un évidement à générer et n'est pas collée au composite de couches pour élément de sécurité dans la zone du au moins un évidement à générer ;
    d) la génération d'au moins un évidement dans la feuille obtenue à l'étape c) afin de, de cette façon, générer une couche de masquage (4, 11), de telle sorte qu'un matériau de transfert pour élément de sécurité est obtenu, dans lequel le composite de couches pour élément de sécurité, dans la zone du au moins un évidement de la couche de masquage (4, 11), par l'effet de pression et éventuellement de chaleur, peut être collé avec un substrat pour document de valeur au moyen de la couche de colle (3, 9) et ensuite détaché du substrat porteur (1, 7), cependant que, dans la zone à l'extérieur du au moins un évidement de la couche de masquage (4, 11), un collage du composite de couches pour élément de sécurité avec le substrat pour document de valeur (5, 14) et un détachement subséquent du composite de couches pour élément de sécurité du substrat porteur (1, 7) est empêché.
  7. Procédé selon la revendication 6, cependant que, à l'étape d), la génération d'au moins un évidement dans la feuille obtenue à l'étape c) a lieu par découpe, et que le matériau de feuille découpé est enlevé.
  8. Procédé selon la revendication 7, cependant que, à l'étape de la découpe, non seulement la feuille à faire insérer dans une couche de masquage (4, 11) est pourvue de lignes de découpe, mais aussi le composite de couches pour élément de sécurité à transférer est pourvu de lignes de découpe.
EP18000151.3A 2017-02-17 2018-02-15 Matériau de transfert d'éléments de sécurité et son procédé de fabrication Active EP3363652B2 (fr)

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DE102019006255A1 (de) * 2019-09-04 2021-03-04 Giesecke+Devrient Currency Technology Gmbh Gegen Spaltung geschütztes Sicherheitspapier und Wertdokument
CN114556460B (zh) * 2019-10-23 2024-05-28 日本瑞翁株式会社 液晶固化层转印贴签、液晶固化层转印物、以及液晶固化层转印贴签的真实性判定方法
DE102019008642A1 (de) * 2019-12-13 2021-06-17 Giesecke+Devrient Currency Technology Gmbh Verfahren zur Herstellung von plättchenförmigen Effektpigmenten

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DE102011117044A1 (de) † 2011-10-27 2013-05-02 Bundesdruckerei Gmbh Sicherheitselement
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EP1940618B1 (fr) † 2005-10-27 2016-08-17 OVD Kinegram AG Procede de transfert d'un corps multicouche et feuille de transfert
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DE102013007484A1 (de) † 2013-04-29 2014-10-30 Giesecke & Devrient Gmbh Optisch variables Sicherheitselement

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