Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/40—Manufacture
  • B42D25/45—Associating two or more layers
  • B42D25/465—Associating two or more layers using chemicals or adhesives
  • B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives

Definitions

• the invention relates to a method for producing foil material for security elements in the form of foil patches, as well as foil material produced accordingly and security elements in the form of a foil patch.
• Foil patches arranged on a carrier tape and a method are known for patch-like sealing of windows in a valuables document substrate.
• the foil patches must be equipped with permanently adhesive adhesives for bonding to the valuables document substrate and also with release agents for removal from the carrier tape. The latter negatively impacts both the firm, permanent bond to the valuables document substrate and impairs the adhesion of any printing inks applied over the foil patch, particularly in intaglio or offset printing.
• the WO 2021069096 A1 This shows two ways in which a security feature transfer material can be bonded to a temporary carrier, i.e., a carrier substrate.
• a temporary carrier i.e., a carrier substrate.
• a coextruded film is used, with one layer of this composite film acting as the carrier substrate and another layer as the plastic layer of the security feature transfer material. Both layers are prone to delamination.
• a coextruded film is used as the carrier substrate, which is detached from the security feature layer composite, specifically from a UV-impregnated lacquer layer, acting as a release layer.
• the first option has the disadvantage that only certain pairings of different plastics result in a co-extruded film, where the different plastics then tend to delaminate.
• the second option has the disadvantage that the UV embossed lacquer layer is located on the outside of the final security element, leaving it unprotected against external influences as an optically effective layer.
• One object of the invention is to produce a foil material for foil patches with optically recognizable and/or machine-readable security features, which can securely seal windows in banknotes or other security and valuable documents and meets the requirements for durability and, with regard to banknotes, their circulation suitability, in particular better than hot stamping foils.
• the foil patches should be removable from the rest of the foil material with as little residue as possible.
• the foil material should be processable on commercially available application equipment, i.e., the foil patches should be die-cut on commercially available equipment and applied to a security or valuable document.
• the substrate can be opaque, transparent, or translucent. Papers, coated papers, or polymer films can all be used. In the case of applying the first plastic film by means of prior electrostatic coating... For charging or corona treatment, the substrate should have a surface coating and/or smoothness on at least the side facing the first plastic film, which provides adhesive properties. PET films or PE-coated kraft papers are suitable for this purpose.
• Flexible plastic films are also suitable as carrier substrates, for example those made of polyimide (PI), polypropylene (PP), monoaxially oriented polypropylene (MOPP), biaxially oriented polypropylene (BOPP), polyethylene (PE), polyphenylene sulfide (PPS), polyetheretherketone (PEEK), polyetherketone (PEK), polyethyleneimide (PEI), polysulfone (PSU), polyaryletherketone (PAEK), polyethylene naphthalate (PEN), liquid crystal polymers (LCP), polyester, polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyamide (PA), polycarbonate (PC), cycloolefin copolymers (COC), polyoxymethylene (POM), acrylonitrile butadiene styrene (ABS), polyvinyl chloride (PVC), ethylene tetrafluoroethylene (ETFE), polytetrafluoroethylene (PTFE), polyvin
• Ethylene tetrafluoroethylene hexafluoropropylene fluoroterpolymers cellulose- or lignin-based plastics, polyhydroxyalkanoates (PHA), thermoplastic starch (TPS), polylactic acid (PLA), polycaprolactone (PCL), polybutylene succinate (PBS), polybutylene adipate terephthalate (PBAT), and/or at least one recycled and/or biodegradable and/or marine-degradable plastic, and/or mixtures and/or copolymers of these materials.
• the carrier substrates in particular carrier films, can be transparent, translucent, semi-opaque, or opaque.
• the support substrate preferably has a thickness of 5-700 ⁇ m, preferably 5-200 ⁇ m, particularly preferably 5-50 ⁇ m.
• the first plastic film is the same width as the carrier substrate, and in particular, it will have the same width.
• the width of the carrier substrate corresponds at least to the width of one film patch, but usually to the width of several film patches spaced apart. After the film patches have been produced and the carrier substrate removed, the first plastic film protects the subsequent safety feature in the layer sequence from external influences.
• the first plastic film is preferably transparent.
• the first plastic film can be a PET film with a thickness of 3 ⁇ m to 15 ⁇ m, preferably 6 ⁇ m to 8 ⁇ m.
• PET films are especially well-suited for capacitor production due to their defect-free and pure nature.
• capacitor films are generally biaxially oriented PET films. Examples of capacitor films are found in the DE19736398A1 The results show that capacitor films exhibit low shrinkage values at high temperatures. Therefore, capacitor films are particularly advantageous for designs with electrostatic charging and corona treatment.
• the advantage of electrostatic charging lies in the fact that no material needs to be placed between the substrate and the first plastic film, thus saving a corresponding work step. Furthermore, no residue remains on the first plastic film after it is separated from the substrate, allowing it to be easily printed on.
• the adhesion resulting from the electrostatic charge is further enhanced by the glass plate effect, which occurs between the smooth surfaces of the substrate and the first plastic film.
• the electrostatic charge and the glass plate effect bond the substrate and the first plastic film so firmly and permanently that the resulting film composite can be processed efficiently and economically.
• the resulting film patches are later applied to security or valuable documents, they can be easily separated from each other without leaving any residue on the first plastic film.
• either the substrate for example, in the case of multi-layer substrates, the layer facing the first plastic film
• the first plastic film is electrostatically charged.
• the plastic with the higher dielectric constant is preferably electrostatically charged.
• both the substrate and the first plastic film are electrostatically charged, in which case the substrate and the first plastic film could, for example, have an opposite electrical potential difference.
• the electrostatic charging can be achieved, for example, by the use of non-electrically conductive guide rollers. Pressure rollers or rollers in general apply pressure to the film web or a plastic coating of the carrier substrate.
• the advantages of corona treatment are similar to those of electrostatic charging; here, too, the glass plate effect promotes adhesion between the smooth surfaces of the substrate and the first plastic film.
• the substrate for example, in the case of multilayer substrates, the layer facing the first plastic film), the first plastic film, or both can be corona-treated.
• a film web or a plastic-coated, web-shaped substrate is exposed to a high-voltage electrical discharge, for example, between a grounded, polished steel or aluminum roller and a closely fitting insulated electrode, or between an insulated roller and an uninsulated electrode.
• the film web or coated substrate rests on the polished roller, and only the side of the film web or coated substrate facing the electrode is treated.
• the electrode is usually supplied by a high-frequency generator with an alternating voltage of 10 to 20 kV and a frequency between 10 and 60 kHz.
• the substrate and/or the first plastic film undergo corona treatment first, followed by electrostatic charging of the substrate and/or the first plastic film.
• the prior corona treatment improves the subsequent electrostatic charging.
• the release liner containing a UV-curing release layer, between the substrate and the first plastic film
• the first film can be made thinner—for example, thinner than with electrostatic charging or corona treatment—and the film material is then easier to handle during further processing.
• the adhesive properties of the release liner can be precisely controlled by the chemical formulation of the UV-curing release layer, thus ensuring residue-free removal of the UV-curing release layer.
• the application of at least one security feature can be done either directly onto the first plastic film or via one or more intermediate layers.
• Several security features, identical or different, can be arranged side by side or on top of each other.
• optical detectable means that an optical effect on the security feature is visible to the naked eye or with the use of an optical device, such as a filter.
• the optical effect can be a static color effect (caused, for example, by color printing in certain areas or by metallization in certain areas) or a variable color effect, an optically variable effect such as a color shift (where the color changes with the viewing angle), effects produced by embossed structures such as holograms, moving images, and/or optically achromatic embossed structures.
• Machine readable means that an effect on the security feature can be read using technical aids, such as a magnetic effect through magnetic particles, or an optical effect in the infrared or UV range.
• a second, sheet-like plastic film or a protective lacquer layer is applied to it—either directly or via one or more intermediate layers.
• the second plastic film can have the same width as the first plastic film and/or the substrate.
• the protective lacquer layer is generally applied over the entire area defined by the first plastic film, or only over parts of it.
• the protective lacquer layer can consist of one or more partial layers, i.e., several layers stacked on top of each other and/or different layers placed side by side.
• the second plastic film is bonded to the security feature using adhesive.
• the protective lacquer layer can be applied directly to the security feature and, if necessary, to intermediate layers arranged on top of it, such as other security features.
• a second plastic film is advantageous when the film patch is applied over an opening, so that the second plastic film lies over the opening.
• this second plastic film is preferably transparent so that the security feature remains visible even through the opening.
• the perforation allows visibility through the film.
• the second plastic film is preferably the same as the first, i.e., made of the same material, particularly the same polymer, and with the same thickness. This has the advantage that the final film patch does not tend to curl due to differing material properties between the first and second plastic films.
• the second plastic film can be replaced by a protective varnish layer, because this side of the finished film patch is not exposed but is, for example, attached to a polymer banknote substrate or plastic card material.
• Suitable protective varnishes include those based on nitrocellulose, acrylates and their copolymers, polyamides and their copolymers, polyvinyl chlorides and their copolymers, crosslinking varnishes, solvent-based varnishes, waterborne varnishes, or UV-curing varnishes.
• the heat-activated adhesive layer applied to the second plastic film or the protective lacquer layer, can be a heat-seal adhesive, a heat-seal lacquer, or a hot melt adhesive.
• This adhesive layer serves to attach the finished foil patch to the security or valuable document, particularly through the application of heat, and is specifically formulated for the material of the security or valuable document.
• the adhesive can be applied across the entire surface or only partially, for example, in a grid pattern or adapted to the shape of the finished foil patch.
• the foil material produced in this way offers a high level of counterfeit protection due to the integrated security feature. It can securely seal windows in banknotes or other security and valuable documents because the first plastic film provides sufficient stability. Since the first plastic film of the foil patch, when attached to a security or valuable document, is positioned away from the document, it protects the security feature from external influences and increases the durability of the foil patch, thus improving the circulation of banknotes.
• the film material according to the invention is present as a web due to the web-shaped carrier substrate and can be processed on commercially available application systems by die-cutting film patches that are placed on the web-shaped carrier substrate.
• the material remains and is then either applied directly from this web to a security or valuable document, or, in the case of banknotes, to a substrate for security or valuable documents – preferably in webs or sheets.
• the individual security or valuable documents, such as banknotes, are then cut or punched from this substrate.
• the first plastic film is provided in web form and is bonded to the substrate using a roll-to-roll process. In this way, the first plastic film can be easily bonded to the substrate using commercially available machinery, such as a laminating machine.
• a heated laminating system when bonding the first plastic film to the substrate by means of prior electrostatic charging or corona treatment, a heated laminating system is used which heats the substrate and the first plastic film from one or both sides. This increases the initial adhesion and compensates for any deformations of the substrate or the first plastic film. If a PE-coated substrate is used, a hot melt coating station (HMCS) can also be used.
• HMCS hot melt coating station
• a first plastic film when applying a first plastic film to a web-shaped carrier substrate by means of a release agent coating containing a UV-curing release layer, it is provided that either the UV-curing release layer is applied to the carrier substrate or to the first plastic film, a laminating adhesive layer is applied to this release layer, and subsequently the carrier substrate and the first plastic film are bonded together by a laminating process.
• the release layer is designed to be non-adhesive, meaning that it adheres to a non-adhesive layer, such as paper or a plastic film, but can be separated from the adjacent paper or plastic layer without leaving any residue.
• the UV-curing release layer is cured by UV irradiation.
• the adhesive properties of the UV-curing release layer can be specifically adjusted by its chemical formulation.
• the UV-curing release layer would be applied to the first plastic film, cured with UV light, coated with a laminating adhesive layer, and the laminating adhesive layer bonded to the substrate. This would allow the substrate, along with the laminating adhesive layer and the UV-cured release layer, to be separated from the first plastic film without leaving any residue.
• the UV-curing release layer could be applied to the substrate, cured with UV light, coated with a laminating adhesive layer, and the laminating adhesive layer bonded to the first plastic film. This would allow the substrate to be separated from the UV-cured release layer later, leaving the laminating adhesive layer and the UV-cured release layer attached to the first plastic film.
• a UV-curing embossing varnish which is also used for embossing structures, can be used as a UV-curing release layer.
• precisely such an embossed structure is produced by first applying a UV-curing embossing lacquer to the first plastic film, embossing it, and then curing it with UV light.
• Embossed structures made of UV-curing embossing lacquer are thermally and mechanically more stable than hot-embossed structures.
• structures made of UV-curing embossing lacquer with a high aspect ratio are often more faithfully molded than hot-embossed structures.
• the embossed structure After the application of an optically effective layer, the embossed structure, together with this layer, forms an optically variable security feature, such as a hologram, a kinegram, a lens arrangement, micromirrors, achromatic structures, or color-reflecting structures.
• an optically variable security feature such as a hologram, a kinegram, a lens arrangement, micromirrors, achromatic structures, or color-reflecting structures.
• Several identical or several different security features can be produced side-by-side (in the plane of the first plastic film) using the embossed structure.
• One or more embossed structures can be applied only to partial areas of the first plastic film, which then later form the entire surface area of a film patch or only a partial area of the film patch.
• Several identical embossed structures can also be applied at regular intervals, which can then later be separated, for example by die-cutting, into individual sections. belong to the foil patch.
• the embossed structure can
• the optically active layer is typically applied directly to the embossed structure, either partially or across the entire surface.
• This layer can be reflective, absorbent, or refractive. It can consist of several sublayers that overlap completely or partially. It is preferably applied to the embossed structure using vacuum deposition (PVD) processes such as metallization, electron beam evaporation, or sputtering. Depending on the optical properties and desired effect, the layers, particularly those vapor-deposited, are transparent, partially transparent, translucent to opaque, or completely opaque.
• PVD vacuum deposition
• the optically active layer can be structured using known demetallization, washing, laser, and/or etching processes, for example, to create security features visible in transmitted light in the form of cutouts. These cutouts can be precisely aligned with the embossed structures and complement them, perhaps forming a common motif. Alternatively, the cutouts can also overlap the embossed structures.
• the visually detectable security feature can generally be visible in reflected and/or transmitted light.
• the security feature with embossed lacquer structure and optically effective layer can be visible in reflected light when viewed from the side of the optically effective layer. It can also be detectable in transmitted light, which first passes through the embossed structure and then through the optically effective layer into the eye of the viewer located on the side of the optically effective layer.
• Additional security features can be incorporated onto, beneath, or between sublayers of the optically effective layer, either across the entire surface or only in specific areas. Examples include UV security features, fluorescent security features, and infrared security features. These additional security features can generally be optical, particularly those using the The security features can produce effects visible to the human eye or machine-readable effects. Other security features can also be optically variable, such as a color-shifting coating, e.g., based on thin-film elements, liquid crystals, thin-film pigments, or liquid crystal pigments. Other security features can also be partially applied translucent layers, printed colored layers, printed metallic layers (each without an optically variable effect), or fluorescent layers.
• the foil patches can be produced on standard die-cutting machines, such as those used for high-quality jewelry labels or overlay foils.
• the backing material is not die-cut, it can continue to serve as a web-like backing until the foil patches are applied to a security or valuable document, which facilitates feeding the foil patches to the documents.
• the die-cut foil web is typically wound up, and during winding, the excess material outside the die-cut area, i.e., outside the foil patches, is removed ("weeded") in the form of a die-cut grid and wound up separately.
• the die-cutting can extend to or even into the release agent. This would prevent the backing material from being die-cut and allow it to continue serving as a web-like backing.
• the foil patches can have any shape, such as circular, oval, triangular, quadrilateral, polygonal, or star-shaped.
• the die-cutting can, but does not have to, be precisely registered to the embossed structures, meaning that identical shapes are present. Foil patches with the same embossed structures at the same locations within the contour of the individual foil patches are produced.
• the carrier substrate can be cut into individual strips, on which preferably only one foil patch is arranged in the width direction, but many identical foil patches are arranged one behind the other in a line in the length direction.
• the foil patches are placed on the security or valuable document with the adhesive side facing up and attached to the document, such as security paper for banknotes, for example, by heat transfer and activation of the adhesive layer.
• the heat can be supplied through the carrier substrate and/or through the security or valuable document. Simultaneously with the heat supply, the foil patch is pressed down. After the foil patches have been applied to the target substrate, the carrier substrate can be removed and, if necessary, reused.
• the foil patch is preferably applied over a window area of the target substrate, i.e., the security or valuable document or the source material (e.g., sheets, rolls) for security or valuable documents.
• the window can either be an opening in the material of the security or valuable document, which is closed by the foil patch, or the window can be a transparent area in the material of the security or valuable document onto which the foil patch is applied.
• the invention also includes a film material that can be produced by the inventive method.
• the invention also includes a safety element in the form of a foil patch, which safety element can be produced from a foil material manufactured by the inventive method.
• the invention also includes a security or valuable document that incorporates a security element according to the invention in the form of foil patches.
• This element can preferably be applied as a closure over window-shaped openings in banknotes and documents.
• It contains at least one security feature and can also contain further security features, as already explained above.
• These security features can include, in particular, optically active structures, optically variable elements, partial metal layers with cutouts in the form of characters, patterns and images, and luminescent elements and images.
• the security features can be visible in reflected light as well as transmitted light in the window area of the banknote or document.
• FIG. 1 shows how a film material for security elements in the form of film patches 4 can be manufactured and constructed in a first embodiment.
• a first plastic film 1 which is also web-shaped, is applied to a web-shaped carrier substrate 3, preferably using a roll-to-roll process.
• the first plastic film 1, or the carrier substrate 3, or both are subjected to corona treatment or electrostatic charging.
• the two web-shaped materials are then pressed together by means of rollers and adhere to each other. This pressing together can take place in a heated laminating machine, which can additionally heat the carrier substrate 3 and the first plastic film 1 from one or both sides to improve adhesion and equalize stresses between the two materials.
• the carrier substrate can then later be separated from the first plastic film 1, as indicated by the horizontal dashed lines.
• At least one security feature 7, which is optically detectable and/or machine-readable, is then applied to the unprinted side of the first plastic film 1.
• This can be, for example, an embossed structure, where a UV-curing embossing varnish is first applied to the first plastic film 1, embossed, and then cured with UV light, and where, as a rule, an optically effective layer is applied directly to the embossed structure.
• the optically effective layer can be a reflective, absorbing, or refractive layer. It can consist of several sublayers that overlap completely or partially. In this way, holograms, kinegrams, microlens arrangements, micromirrors, other achromatic structures, or color-reflecting structures, especially with a color-shifting effect, can be formed.
• a second, sheet-like plastic film 2 is applied over it.
• a laminating varnish 8 is applied to the safety element 7, acting as an adhesive for the second plastic film 2 and thus permanently bonding it to the existing layered composite.
• an adhesive layer 10 is applied to the second plastic film 2 – here covering the entire surface. The adhesive layer 10 can be activated by heat.
• Fig. 2 is shown how the foil material is made from Fig. 1 Individual foil patches 4 are produced.
• a die-cutting tool represented by thick vertical lines, cuts through the foil material from the side of the adhesive layer 10 down to the carrier substrate 3, creating individual foil patches 4 consisting of congruent sections of the first plastic film 1, the security feature 7, the laminating varnish 8, the second plastic film 2, and the adhesive layer 10.
• the adhesive layer 10 does not need to be continuous but could also be smaller in area than the sections of the first or the second plastic film 1, 2.
• the security feature 7 does not need to extend over the entire cross-section of the foil patch 4; if necessary, the two adjacent layers, here the first plastic film 1 and the laminating varnish 8, would then touch in some areas.
• the excess material outside the die-cut i.e., outside the film patches 4 can be removed ("weeded") in the form of a die-cut grid and wound up separately.
• Individual film patches 4 then remain on the carrier substrate 3, usually also arranged in a grid in two dimensions.
• the carrier substrate 3 can then be cut into strips (see thick vertical line), on which strips preferably only one film patch 4 is arranged in the width direction, but many identical film patches are arranged one behind the other in a line in the length direction.
• the strips can be rolled up and then unrolled to apply the foil patches 4 to a security or valuable document 11 and adhered with the adhesive layer 10, for example over a window of the security or valuable document 11, see
• a heated stamp can then be applied to the side of the security or valuable document 11 and/or to the side of the carrier substrate 3. This activates the adhesive layer 10 and permanently bonds it to the surface of the security or valuable document 11. Once this has occurred, the carrier substrate can be peeled off the first plastic film 1, as indicated by the arrow. This film then protects the security feature from below, while the security feature is protected from above by the second plastic film 2.
• Fig. 5 This shows how a film material for security elements in the form of film patches 4 can be manufactured and constructed in a second embodiment.
• a first plastic film 1 which is also in a web shape, is applied to a web-shaped carrier substrate 3, preferably using a roll-to-roll process.
• the carrier substrate 3 is first provided with a release agent containing a UV-curing release layer 5:
• a UV-curing release layer 5 is applied to the first plastic film 1, cured with UV light, and then a laminating adhesive layer 6 is applied to the UV-cured release layer 5.
• the carrier substrate 3 and the first plastic film 1 are bonded together by means of a laminating process, i.e., essentially pressed together by rollers.
• the laminating adhesive layer 6 forms a permanent bond with both the UV-crosslinked release layer 5 and the other adjacent layer, here the substrate 3.
• the UV-crosslinked release layer 5, with its side opposite the laminating adhesive layer 6, only forms a detachable bond and can later be separated from the first plastic film 1 together with the substrate 3 and the laminating adhesive layer 6, as is again shown by the dashed lines.
• a UV-curing release layer 5 could first be applied to the carrier substrate 3, cured with UV light, and then a laminating adhesive layer 6 applied to the UV-cured release layer 5. Subsequently, the carrier substrate 3 and the first plastic film 1 are bonded together using a laminating process, essentially by pressing them together with rollers. The laminating adhesive layer 6 forms a permanent bond with both the UV-cured release layer 5 and the other adjacent layer, then the plastic film 1.
• the UV-crosslinked release layer 5 forms only a detachable connection with its side that is opposite the laminating adhesive layer 6, so that later the carrier substrate 3 can be separated from the laminating adhesive layer 6 and thus from the remaining layer composite containing the first plastic film 1.
• This can, for example, again be an embossed structure, where a UV-curing embossing varnish is first applied to the first plastic film 1, this is embossed, and then cured with UV light, and where, as a rule, an optically effective layer is applied directly to the embossed structure.
• the optically effective layer can be a reflective, absorbing, or refractive layer. It can consist of several sublayers that overlap completely or partially. In this way, holograms, kinegrams, microlens arrangements, micromirrors, other achromatic structures, or color-reflecting structures, especially with a color-shifting effect, can be formed.
• a protective lacquer layer 9 is applied over the security element 7, covering the entire cross-section of the film material.
• an adhesive layer 10 is applied to the protective lacquer layer 9 – here covering the entire surface. The adhesive layer 10 can be activated by heat.
• the protective coating layer 9 does not need to be applied over the entire cross-section of the film material, but can also be applied only partially, in certain areas.
• the adhesive layer 10 could be applied to partial areas. Accordingly, the adhesive layer 10 could then be applied partially to the protective coating layer 9 and partially to the safety element 7, or only to the (partially present) protective coating layer 9, or only to the safety element 7.
• FIG. 5 The figure also shows how individual film patches 4 are produced from the film material.
• a die-cutting tool represented by thick vertical lines, cuts through the film material from the side of the adhesive layer 10 at least as far as the UV-curing release layer 5, creating individual film patches 4 consisting of congruent sections of the first plastic film 1, the security feature 7, the protective lacquer layer 9, and the adhesive layer 10.
• the film material could also be cut through as far as the laminating adhesive layer 6, or as far as the carrier substrate 3.
• the adhesive layer 10 need not be continuous, but could also be smaller in area than the sections of the first plastic film 1.
• the excess material outside the die-cut i.e., outside the foil patches 4 can be removed ("weeded") in the form of a die-cut grid and wound up separately.
• Individual foil patches 4 then remain on the carrier substrate 3, usually also arranged in a grid-like pattern in two dimensions.
• the carrier substrate 3 can then be cut into strips, on which strips preferably only one foil patch 4 is arranged in the width direction, but many identical foil patches are arranged one behind the other in a line in the length direction.
• the strips can be rolled up and then unwound to apply the foil patches 4 to a security or valuable document 11 and adhered to it with the adhesive layer 10, for example, see [reference].
• a heated stamp can then be applied from the side of the security or valuable document 11 and/or from the side of the carrier substrate 3, which activates the adhesive layer 10 and permanently bonds it to the surface of the security or valuable document 11.
• the carrier substrate can be peeled off the first plastic film 1, as indicated by the arrow. This film then protects the security feature from below, while the security feature is protected from above by the security or valuable document 11 is protected, as well as by the protective lacquer layer 9.
• the layers above at least one security feature 7 in the version of the Figs. 1-4 with those in the version of the Figs. 5-6 Interchangeable. It could therefore be in the Figs. 1-4 Instead of the laminating lacquer 8 and the second plastic film 2, a protective lacquer layer 9 – partial or full-surface – could be applied, or it could be in the Figs. 5-6 Instead of the protective lacquer layer 9, a laminating lacquer 8 and a second plastic film 2 are applied.

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Citations (6)

• 2024
  • 2024-07-15 EP EP24188576.3A patent/EP4681935A1/fr active Pending

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