EP4230426A1 - Security element transfer material and method for producing the same - Google Patents
Security element transfer material and method for producing the same Download PDFInfo
- Publication number
- EP4230426A1 EP4230426A1 EP22020540.5A EP22020540A EP4230426A1 EP 4230426 A1 EP4230426 A1 EP 4230426A1 EP 22020540 A EP22020540 A EP 22020540A EP 4230426 A1 EP4230426 A1 EP 4230426A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- security element
- transfer material
- element transfer
- release layer
- 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.)
- Pending
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- 239000010410 layer Substances 0.000 claims abstract description 187
- 239000002346 layers by function Substances 0.000 claims abstract description 83
- 239000012790 adhesive layer Substances 0.000 claims abstract description 31
- 230000000694 effects Effects 0.000 claims abstract description 20
- 239000000758 substrate Substances 0.000 claims description 28
- 238000001465 metallisation Methods 0.000 claims description 25
- 238000004049 embossing Methods 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 11
- 238000004080 punching Methods 0.000 claims description 6
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 239000004920 heat-sealing lacquer Substances 0.000 description 11
- 239000004922 lacquer Substances 0.000 description 10
- 239000000049 pigment Substances 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
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- 238000005530 etching Methods 0.000 description 2
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Images
Classifications
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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
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/324—Reliefs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
- B41M1/30—Printing on other surfaces than ordinary paper on organic plastics, horn or similar materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/12—Transfer pictures or the like, e.g. decalcomanias
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
- B41M5/03—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/42—Intermediate, backcoat, or covering layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/328—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
- B42D25/351—Translucent or partly translucent parts, e.g. windows
-
- 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
- B42D25/40—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
Definitions
- the invention relates to a security element transfer material, a method for producing the security element transfer material and a method for producing an object of value, in particular a document of value, using the security element transfer material.
- Valuables such as branded items or documents of value, in particular banknotes, are often equipped with security elements that allow the authenticity of the valuables to be checked and at the same time serve as protection against unauthorized reproduction.
- Security elements that have an optically variable effect are often encountered. So-called tilting effects, in which an optical appearance changes depending on the viewing angle, are particularly popular. Tilting effects can be B. produce by metallized prehistories. Examples of this are diffractive embossed structures with dimensions in the order of magnitude of visible light, so-called embossed holograms, or embossed structures with larger dimensions in the form of micromirrors.
- a corresponding functional layer structure can first be built up on a carrier film and later transferred from there to the object of value.
- transfer elements e.g. B. in the form of patches that can be applied, labels, strips or threads that can be embedded in a security paper.
- adhesive layer e.g. B. a heat-seal lacquer layer, by means of which the security element is glued to the object of value.
- the security element retains the carrier film after transfer to the object of value, which then forms an integral part of the security element.
- a security element in the form of a transfer element and a method for producing the same are known from the publication DE 10 2016 009 318 A1 known.
- the security element comprises a carrier film, a release layer that is applied over the entire surface of the carrier film, a functional layer structure that is applied over the entire surface of the release layer, a grid-like stabilization layer that is partially applied to the functional layer structure, and a heat-seal lacquer layer that is applied to the functional layer structure and the grid-like stabilization layer is applied over the entire surface.
- the grid-like stabilization layer including the heat-sealing lacquer layer, the functional layer structure and the release layer, is punched out as the area on the carrier film that is not to be transferred and then "weeded" in such a way that the remaining part contains the security element or the area to be transferred. Weeding is made possible by the tough grid-like stabilization layer, which gives the material of the non-transmission area the necessary stability. The remaining transfer area, which forms the security element, is then glued to a banknote substrate by means of the heat-seal lacquer layer, and finally the carrier film is detached from the security element.
- the invention is based on the object of specifying a method for producing a security element transfer material in a simple manner and of providing a corresponding security element transfer material.
- a first aspect of the present disclosure relates to a method for producing a security element transfer material, in which a carrier film is provided, a release layer is applied to the carrier film, one or more superimposed layers to produce an optically variable effect having a functional layer structure are applied over part of the surface in such a way that the functional layer structure lies completely with an outer contour on the release layer, and an adhesive layer is applied to the functional layer structure in such a way that it either exactly covers the functional layer structure or over the outer contour of the functional layer structure until it reaches the release layer protrudes.
- the carrier film serves to support the security element transfer material during manufacture and, after the security element transfer material has been transferred to a substrate of an object of value, e.g. B. a value document substrate to be detached from the security element transfer material.
- the carrier film can, for. B. be a PET film.
- the carrier film is available as roll goods in endless form or as a multi-use sheet, on which a number of security elements are built up side by side.
- the release layer adheres only weakly to the carrier film, so that later detachment of the carrier film from the security element transfer material is made possible.
- the release layer is, for example, a UV lacquer layer, a wax layer or a release lacquer layer.
- the release layer is applied to the carrier film either over the entire surface or preferably only over part of the surface.
- a motif shape of the release layer can be freely selected and preferably corresponds to a motif shape of the functional layer structure applied above it.
- the release layer is preferably transparent.
- the functional layer structure offers the optically variable effect, e.g. B. a tilting effect, a security function of the security element transfer material.
- the functional layer structure is applied over part of the surface in such a way that its outer contour lies completely on the release layer.
- the functional layer structure as a whole does not have to lie completely on the release layer.
- the functional layer structure can lie partly on the release layer and partly on the carrier film. It is important that its outer contour lies completely on the release layer.
- a motif form of the part-area functional layer structure can also be freely selected.
- the motif shapes of the release layer and the functional layer structure are preferably similar, preferably identical, except that the release layer protrudes laterally beyond the functional layer structure, ie has a larger outer contour.
- the adhesive layer ensures the desired adhesion of the functional layer structure to the substrate of the object of value, in particular a value document substrate, and has stronger adhesion to the substrate than the adhesion between the carrier film and the release layer and, insofar as the functional layer structure is not completely on the release layer, than adhesion between the carrier film and the functional layer structure.
- the adhesive layer is applied to the functional layer structure in such a way that it either covers the functional layer structure exactly or protrudes a little beyond the outer contour of the functional layer structure until it reaches the release layer. "A little way” means that the adhesive layer does not reach a limit of the release layer and only slightly protrudes beyond the functional layer structure, preferably as slightly as possible in terms of production technology.
- Adhesive layer that defines the contour of the security element transferred from the carrier film to the object of value.
- An overhang of the adhesive layer should therefore be less than 2 mm, preferably less than 1 mm, particularly preferably less than 0.5 mm.
- the adhesive layer is z.
- the adhesive layer can be transparent and applied to a transparent window in the substrate of the valuable, so that the optically variable effect can also be seen from the opposite side of the valuable.
- a core of the present method lies in the fact that the contour of the adhesive layer applied over part of the area essentially defines the region of the security element transfer material to be transferred and thus the contour of the security element.
- the present method for producing the security element transfer material with the carrier film which can be detached from it does not require a grid-like stabilizing layer, a stamping operation or weeding. Thus, manufacturing is easy.
- a primer can be applied to the functional layer structure in such a way that it either covers the functional layer structure exactly or protrudes a little beyond the outer contour of the functional layer structure until it reaches the release layer.
- the adhesive layer is then applied to the primer.
- the primer serves to improve the bond between the functional layer structure and the adhesive layer.
- the release layer is only applied to part of the surface of the carrier film, such that the outer contour of the release layer protrudes all around over the outer contour of the functional layer structure.
- the protruding part of the release layer effectively prevents adhesion between the adhesive layer and the carrier film. Such an adhesion is undesirable because it prevents the carrier film from being detached later from the security element transfer material and can lead to the security element breaking.
- the functional layer structure is produced in such a way that it either lies completely on the release layer over part of the area or protrudes beyond an inner contour of the release layer over part of the area.
- the functional layer structure lies completely between the adhesive layer and the release layer, while in the second variant it is completely covered on one side by the adhesive layer and on the other side partially by the release layer and partially by the carrier film.
- the security element transfer material according to the second variant can be produced even thinner. In particular, an observer looks at the security element applied to the object of value directly at the functional layer structure and not through the release layer, so that the optically variable effect is particularly effective.
- the release layer is preferably transparent or at least translucent in order not to impede the optically variable effect of the functional layer structure. This is because the release layer is the uppermost layer of the security element that is ultimately applied to the object of value and through which an observer can see.
- the release layer can also have other security features, e.g. B. interference layer pigments, liquid crystal pigments or fluorescent substances. If, however, the functional layer structure lies only with its outer contour on the release layer, the release layer can also be opaque and form a kind of framework for the optically variable effect of the functional layer structure.
- an embossing layer is applied, into which a motif is embossed.
- the embossing layer can be, for example, a UV embossing lacquer layer which is applied in such a way, e.g. B. printed, that it is completely with its outer contour on the release layer.
- a metallization layer is then applied to the embossed motif in order to create a metallized embossed layer as a functional layer structure.
- the structures of the embossing layer can be so small that they act diffractively and produce a holographic effect, or they can be larger and form micromirrors with the metallization layer.
- the metallized embossing layer thus exhibits a tilting effect in which an optical appearance changes depending on the viewing angle.
- a wash color layer can be applied to the embossing layer in such a way that the wash color layer only partially covers the embossing layer.
- the wash color layer with the overlying metallization layer is removed by washing so that the metallization layer forms at least one pattern or character, e.g. B. as negative writing (clear text).
- the metallization layer may be partially demetallized by etching or laser instead of by the wash-color layer.
- the demetallized areas of the metallization layer also produce a see-through effect, which allows the pattern or character to be recognized particularly clearly when viewed in transmitted light.
- a closed or interrupted punching line can be provided through the adhesive layer and the release layer.
- B. is generated by means of a mechanical punching tool or laser on the carrier film.
- the punching line is not essential for detaching the carrier film from the security element transfer material, because the contour is essentially predetermined by the contour of the adhesive layer.
- the die-cut line ensures a clean and sharp detachment edge.
- a second aspect of the present disclosure relates to a corresponding security element transfer material as such.
- the security element transfer material comprises a carrier foil, a release layer which is applied to the carrier foil, a functional layer structure which comprises one or more superimposed layers and has an optically variable effect and the with an outer contour lying completely on the release layer, and an adhesive layer which is applied in register to the functional layer structure in such a way that it protrudes a little beyond the outer contour of the functional layer structure until it reaches the release layer.
- a third aspect of the present disclosure relates to a method for producing an object of value, in which the security element transfer material is produced according to either the first aspect of the present disclosure or the second aspect of the present disclosure is provided, a substrate of an object of value, e.g. B. a value document substrate, is provided, the security element transfer material is bonded to the substrate by means of the adhesive layer of the security element transfer material, and the carrier film is detached from the security element transfer material, so that the security element remains on the object of value.
- the security element allows the authenticity of the valuable to be checked and at the same time serves as protection against unauthorized reproduction.
- the substrate of the valuable is z.
- the adhesive layer comprises a heat-seal lacquer layer
- heating takes place either over the entire security element transfer material or only in the area where the Heat seal lacquer layer is located.
- the adhesive layer is preferably activated by means of UV radiation.
- the banknote 1 shows a schematic representation of a banknote 1 with a security element 12.
- the banknote 1 comprises a banknote substrate 14, on which the security element 12 is applied.
- the banknote substrate 14 is z.
- B a paper substrate, polymeric substrate or composite substrate.
- the motif shape of the security element 12 can be different than the illustrated star.
- the security element 12 allows the authenticity of the banknote 1 to be checked and at the same time serves as protection against unauthorized reproduction.
- FIG. 2 shows a plan view of a security element transfer material 10 comprising an endless carrier film 16, z. B. an endless PET film as rolled goods, on which a plurality of security elements 12 is applied. Deviating from 2 it is also possible for only a single security element 12 to be provided on a carrier film 16, or the carrier film 16 is present as a multiple-use sheet.
- the security element transfer material 10 comprises a carrier film 16, a transparent release layer 22, which is applied over the entire surface of the carrier film 16, a functional layer structure 70, which is only partially applied to the release layer 22, an optional primer 60, which is applied to the functional layer structure 70 in such a way that it coincides with an outer contour 71 of the functional layer structure 70 or, as in this case, protrudes a little beyond the outer contour 71 of the functional layer structure 70 until it reaches the release layer 22, and a heat-sealing lacquer layer 50 which is applied to the optional primer 60 in such a way that it ends with the outer contour 71 of the functional layer structure 70 or at most protrudes a little beyond the outer contour 71 of the functional layer structure 70 until it reaches the release layer 22 .
- an overhang of the heat-sealing lacquer layer 50 can be less than 2 mm, preferably less than 1 mm, particularly preferably less than 0.5 mm.
- the security element transfer material 10 according to 4 differs from the security element transfer material 10 according to FIG 3 in that the release layer 22 is applied to the carrier film 16 only over part of the area.
- the release layer 22 has an outer contour 33 which protrudes all around beyond the outer contour 71 of the functional layer structure 70 .
- the motif shapes defined by the outer contours 33 and 71 of the release layer 22 and the functional layer structure 70 are preferably similar, preferably identical, except that the release layer 22 has a larger outer contour 33 than the functional layer structure 70.
- figure 5 12 shows a third exemplary embodiment of the security element transfer material 10 in cross section.
- the Security element transfer material 10 according to figure 5 differs from the security element transfer material 10 according to FIG 4 in that the release layer 22 also includes an inner contour 34 in addition to the outer contour 33 .
- the release layer 22 can also only include the inner contour 34 and otherwise, as in 3 , are present over the entire surface (not shown).
- the functional layer structure 70 is applied over part of the surface of the release layer 22 in such a way that the functional layer structure 70 protrudes beyond the inner contour 34 of the release layer 42 .
- the shape of the motif defined by the inner contour 34 of the release layer 22 preferably corresponds to the shape of the motif defined by the outer contour 33 of the release layer 22 , so that the release layer 22 forms a frame with a constant width for the functional layer structure 70 .
- the security element transfer material 10 according to figure 5 is thinner than the security element transfer materials 10 according to FIG Figures 3 and 4 .
- the security element transfer material 10 according to 6 differs from the security element transfer material 10 according to FIG figure 5 only through a punched line 55.
- the punched line 55 runs either closed or interrupted around the functional layer structure 70.
- the punching line 55 is not mandatory for the later detachment of the carrier film 16 from the security element 12 because the contour of the security element 12 is essentially predetermined by the contour of the heat-sealing lacquer layer 50 .
- the security element transfer materials 10 according to Figures 3 and 4 can also include such a punched line 55 .
- FIG 7 12 shows the security element transfer material 10.
- FIG 6 inverted on a banknote substrate 14 in cross section.
- the heat-sealing lacquer layer 50 melts as a result of pressure and increased temperature and then cools down again, so that the security element 12 sticks to the banknote substrate 14 .
- the heating takes place either over the entire surface of the entire security element transfer material 10 or only in the area where the heat-sealing lacquer layer 50 is located.
- the heat-sealing lacquer layer 50 can be activated by means of UV radiation.
- FIG. 8 shows the arrangement 7 with the carrier film 16 detached from the security element 12 in cross section. Detachment is made possible by the fact that the adhesion between the banknote substrate 14 and the heat-seal lacquer layer 50 is stronger than the adhesion between the carrier film 16 and the functional layer structure 70 and than the adhesion between the carrier film 16 and the release layer 22.
- the punched line 55 ensures that that the security element 12 receives a clean and sharp outer contour.
- the functional layer structure 70 is a single layer, e.g. B. a printing layer with interference layer pigments or liquid crystal pigments.
- 9 shows a fifth embodiment of the security element transfer material 10 in cross section.
- the security element transfer material 10 according to 9 differs from the security element transfer materials 10 described above in that the functional layer structure 70 is not a single layer but a multilayer structure.
- the functional layer structure 70 comprises an embossing layer 80, e.g. B. an embossing lacquer layer, with a thin metallization layer 85, which the embossed structures of the embossing layer 80 follows.
- the embossing layer 80 is applied in such a way that it projects beyond the inner contour 34 of the release layer 22 without reaching the outer contour 33 of the release layer 22 .
- the metallization layer 85 is applied over the entire surface in such a way that it also covers the embossing layer 80 , the release layer 22 and the carrier film 16 .
- the dimensions of the embossed structures of the embossing layer 80 can be so small that they have a diffractive effect and produce a holographic effect, or they can be larger and form micromirrors with the metallization layer 85 .
- the functional layer structure 70 according to 9 thus exhibits a tilting effect in which an optical appearance changes depending on the viewing angle. Deviating from 9 the metallization layer 85 can only be applied locally. Also in the embodiments according to Figures 3 to 6 Instead of a single-layer, a multi-layer functional layer structure 70 can be used, in particular according to FIG 9 , be provided.
- Figures 10A to 10F show diagrammatically individual process stages in the production and application of a sixth exemplary embodiment of the security element transfer material 10 in cross section.
- a carrier film 16 is provided, to which a release layer 22 is applied partially or over the entire surface.
- the release layer 22 includes an outer contour 33 and an inner contour 34 at the same time, ie it is present over part of the area.
- an embossing layer 80 is first applied in such a way that it protrudes beyond the inner contour 34 of the release layer 22 only so far that the outer contour 33 of the release layer 22 protrudes all around over an outer contour 71 of the embossing layer 80.
- a motif is embossed into the embossing layer 80 and a wash color layer 82 is partially applied to the embossed motif.
- a metallization layer 85 is then applied in such a way that it covers at least the embossing layer 80 and the washed ink layer 82 and, in this exemplary embodiment, also the release layer 22 and the carrier film 16 .
- the washed color layer 82 with the metallization layer 85 lying thereon is removed by washing, so that the remaining metallization layer 85 only partially covers the embossing layer 80 and forms at least one pattern or character, e.g. B. as negative writing (clear text).
- the metallization layer 85 may be partially demetallized by etching or laser.
- an optional primer 60 and a heat-sealing lacquer layer 50 are applied to the functional layer structure 70 in the manner already described in connection with FIG 6 mentioned.
- the security element transfer material 10 produced in this way according to FIG Figure 10D differs from the security element transfer material 10 according to FIG 9 only through the demetallized areas in the metallization layer 85.
- den Figures 10E and 10F is shown as the security element transfer material 10 according to FIG Figure 10D first bonded to a banknote substrate 14 and finally the carrier film 16 is detached from the security element 12.
- the gluing step in Figure 10E and the detachment operation in Figure 10F are identical to the in Figures 7 and 8 mentioned work steps.
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- Credit Cards Or The Like (AREA)
Abstract
Verfahren zum Herstellen eines Sicherheitselement-Transfermaterials (10), welches die folgenden Schritte umfasst: Bereitstellen einer Trägerfolie (16); Aufbringen einer Releaseschicht (22) auf die Trägerfolie (16); teilflächiges Aufbringen einer oder mehrerer übereinanderliegender Schichten zur Erzeugung eines einen optisch variablen Effekt aufweisenden Funktionsschichtaufbaus (70) derart, dass er mit einer Außenkontur (71) vollständig auf der Releaseschicht (22) liegt; und Aufbringen einer Klebstoffschicht (50) auf den Funktionsschichtaufbau (70) derart, dass sie den Funktionsschichtaufbau (70) entweder exakt abdeckt oder über die Außenkontur (71) des Funktionsschichtaufbaus (70) bis zum Erreichen der Releaseschicht (22) ein Stück weit hinausragt. Außerdem betrifft die Offenbarung ein entsprechendes Sicherheitselement-Transfermaterial (10) als solches und ein Verfahren zum Herstellen eines Wertgegenstands (10) unter Verwendung des Sicherheitselement-Transfermaterials (10). Die Releaseschicht (22) wird nur teilflächig aufgebracht, derart dass eine Außenkontur (33) der Releaseschicht (22) über die Außenkontur (71) des Funktionsschichtaufbau (70) rundherum hinausragt.Method for producing a security element transfer material (10), comprising the following steps: providing a carrier film (16); applying a release layer (22) to the carrier film (16); partial surface application of one or more superimposed layers to produce a functional layer structure (70) having an optically variable effect in such a way that its outer contour (71) lies completely on the release layer (22); and applying an adhesive layer (50) to the functional layer structure (70) in such a way that it either covers the functional layer structure (70) exactly or projects a little beyond the outer contour (71) of the functional layer structure (70) until it reaches the release layer (22). The disclosure also relates to a corresponding security element transfer material (10) as such and a method for producing an object of value (10) using the security element transfer material (10). The release layer (22) is only applied over part of the surface in such a way that an outer contour (33) of the release layer (22) protrudes all around over the outer contour (71) of the functional layer structure (70).
Description
Die Erfindung betrifft ein Sicherheitselement-Transfermaterial, ein Verfahren zum Herstellen des Sicherheitselement-Transfermaterials und ein Verfahren zum Herstellen eines Wertgegenstands, insbesondere Wertdokuments, unter Verwendung des Sicherheitselement-Transfermaterials.The invention relates to a security element transfer material, a method for producing the security element transfer material and a method for producing an object of value, in particular a document of value, using the security element transfer material.
Wertgegenstände, wie Markenartikel oder Wertdokumente, insbesondere Banknoten, werden oft mit Sicherheitselementen ausgestattet, die eine Überprüfung der Echtheit der Wertgegenstände erlauben und zugleich als Schutz vor unerlaubter Reproduktion dienen. Häufig anzutreffen sind Sicherheitselemente, die einen optisch variablen Effekt aufweisen. Besonders beliebt sind sogenannte Kippeffekte, bei denen sich ein optisches Erscheinungsbild abhängig vom Betrachtungswinkel ändert. Kippeffekte lassen sich z. B. durch metallisierte Prägeschichten erzeugen. Beispiele dafür sind diffraktive Prägestrukturen mit Abmessungen in der Größenordnung des sichtbaren Lichts, sogenannte Prägehologramme, oder Prägestrukturen mit größeren Abmessungen in Form von Mikrospiegeln.Valuables, such as branded items or documents of value, in particular banknotes, are often equipped with security elements that allow the authenticity of the valuables to be checked and at the same time serve as protection against unauthorized reproduction. Security elements that have an optically variable effect are often encountered. So-called tilting effects, in which an optical appearance changes depending on the viewing angle, are particularly popular. Tilting effects can be B. produce by metallized prehistories. Examples of this are diffractive embossed structures with dimensions in the order of magnitude of visible light, so-called embossed holograms, or embossed structures with larger dimensions in the form of micromirrors.
Bei der Herstellung des mehrschichtigen Sicherheitselements kann ein entsprechender Funktionsschichtaufbau zunächst auf einer Trägerfolie aufgebaut und später von dort auf den Wertgegenstand übertragen werden. Man spricht insoweit auch von Transferelementen, z. B. in Form von applizierbaren Patches, Etiketten, Streifen oder in ein Sicherheitspapier einlagerbaren Fäden. In der Regel ist die oberste Schicht des Sicherheitselements eine Klebstoffschicht, z. B. eine Heißsiegellackschicht, mittels der das Sicherheitselement auf dem Wertgegenstand verklebt wird.In the production of the multi-layer security element, a corresponding functional layer structure can first be built up on a carrier film and later transferred from there to the object of value. One also speaks of transfer elements, e.g. B. in the form of patches that can be applied, labels, strips or threads that can be embedded in a security paper. Usually the top layer of the security element an adhesive layer, e.g. B. a heat-seal lacquer layer, by means of which the security element is glued to the object of value.
In manchen Gestaltungen ist es von Vorteil, wenn das Sicherheitselement nach der Übertragung auf den Wertgegenstand die Trägerfolie behält, die dann einen integrierten Bestandteil des Sicherheitselements bildet. In anderen Gestaltungen ist es dagegen wünschenswert, die Trägerfolie nach der Übertragung vom Sicherheitselement abzulösen. Im Vergleich zur integrierten Trägerfolie bildet diese Trägerfolie somit nur einen temporären Bestandteil des Sicherheitselements, welches nach der Ablösung sehr dünn ist. So kann ein Stapelproblem bei Wertgegenständen vermieden werden. Problematisch ist insoweit, das Sicherheitselement von der Trägerfolie zuverlässig und konturengenau abzulösen.In some configurations it is advantageous if the security element retains the carrier film after transfer to the object of value, which then forms an integral part of the security element. In other designs, on the other hand, it is desirable to detach the carrier film from the security element after the transfer. Compared to the integrated carrier film, this carrier film thus forms only a temporary component of the security element, which is very thin after detachment. In this way, a stacking problem with valuables can be avoided. In this respect, it is problematic to detach the security element from the carrier film reliably and with precise contours.
Ein Sicherheitselement in Gestalt eines Transferelements und ein Verfahren zum Herstellen desselben sind aus der Druckschrift
Das Verfahren gemäß der Druckschrift
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren anzugeben, um ein Sicherheitselement-Transfermaterial in einfacher Weise herzustellen, sowie ein entsprechendes Sicherheitselement-Transfermaterial bereitzustellen.The invention is based on the object of specifying a method for producing a security element transfer material in a simple manner and of providing a corresponding security element transfer material.
Diese Aufgabe wird durch ein Verfahren zum Herstellen eines Sicherheitselement-Transfermaterials und ein entsprechendes Sicherheitselement-Transfermaterial mit den Merkmalen der unabhängigen Ansprüche gelöst. Weiterbildungen der Offenbarung sind Gegenstand der abhängigen Ansprüche.This object is achieved by a method for producing a security element transfer material and a corresponding security element transfer material having the features of the independent claims. Developments of the disclosure are the subject matter of the dependent claims.
Ein erster Aspekt der vorliegenden Offenbarung betrifft ein Verfahren zum Herstellen eines Sicherheitselement-Transfermaterials, bei dem eine Trägerfolie bereitgestellt wird, eine Releaseschicht auf die Trägerfolie aufgebracht wird, eine oder mehrere übereinanderliegende Schichten zur Erzeugung eines einen optisch variablen Effekt aufweisenden Funktionsschichtaufbaus teilflächig aufgebracht werden, derart dass der Funktionsschichtaufbau mit einer Außenkontur vollständig auf der Releaseschicht liegt, und eine Klebstoffschicht auf den Funktionsschichtaufbau derart aufgebracht wird, dass sie den Funktionsschichtaufbau entweder exakt abdeckt oder über die Außenkontur des Funktionsschichtaufbaus bis zum Erreichen der Releaseschicht ein Stück weit hinausragt.A first aspect of the present disclosure relates to a method for producing a security element transfer material, in which a carrier film is provided, a release layer is applied to the carrier film, one or more superimposed layers to produce an optically variable effect having a functional layer structure are applied over part of the surface in such a way that the functional layer structure lies completely with an outer contour on the release layer, and an adhesive layer is applied to the functional layer structure in such a way that it either exactly covers the functional layer structure or over the outer contour of the functional layer structure until it reaches the release layer protrudes.
Grundsätzlich dient die Trägerfolie dazu, während der Herstellung das Sicherheitselement-Transfermaterial zu stützen und nach einer Übertragung des Sicherheitselement-Transfermaterials auf ein Substrat eines Wertgegenstands, z. B. ein Wertdokumentsubstrat, vom Sicherheitselement-Transfermaterial abgelöst zu werden. Die Trägerfolie kann z. B. eine PET-Folie sein. Zur Massenproduktion von Sicherheitselement-Transfermaterialien liegt die Trägerfolie als Rollenware in endloser Form oder als Mehrfachnutzenbogen vor, worauf eine Mehrzahl von Sicherheitselementen nebeneinander aufgebaut wird.In principle, the carrier film serves to support the security element transfer material during manufacture and, after the security element transfer material has been transferred to a substrate of an object of value, e.g. B. a value document substrate to be detached from the security element transfer material. The carrier film can, for. B. be a PET film. For the mass production of security element transfer materials, the carrier film is available as roll goods in endless form or as a multi-use sheet, on which a number of security elements are built up side by side.
Die Releaseschicht weist zur Trägerfolie nur eine schwache Haftung auf, damit das spätere Ablösen der Trägerfolie vom Sicherheitselement-Transfermaterial ermöglicht wird. Bei der Releaseschicht handelt es sich beispielsweise um eine UV-Lackschicht, eine Wachsschicht oder eine Releaselackschicht. Die Releaseschicht wird auf die Trägerfolie entweder vollflächig oder vorzugsweise nur teilflächig aufgebracht. Beim teilflächigen Aufbringen der Releaseschicht ist eine Motivform der Releaseschicht frei wählbar und entspricht vorzugsweise einer Motivform des darüber aufgebrachten Funktionsschichtaufbaus. Vorzugsweise ist die Releaseschicht transparent.The release layer adheres only weakly to the carrier film, so that later detachment of the carrier film from the security element transfer material is made possible. The release layer is, for example, a UV lacquer layer, a wax layer or a release lacquer layer. The release layer is applied to the carrier film either over the entire surface or preferably only over part of the surface. When applying the release layer over part of the area, a motif shape of the release layer can be freely selected and preferably corresponds to a motif shape of the functional layer structure applied above it. The release layer is preferably transparent.
Der Funktionsschichtaufbau bietet durch den optisch variablen Effekt, z. B. einem Kippeffekt, eine Sicherheitsfunktion des Sicherheitselement-Transfermaterials. Der Funktionsschichtaufbau wird teilflächig aufgebracht, derart dass er mit seiner Außenkontur vollständig auf der Releaseschicht liegt. Allerdings muss der Funktionsschichtaufbau als Ganzes nicht vollständig auf der Releaseschicht liegen. Zum Beispiel kann der Funktionsschichtaufbau teilweise auf der Releaseschicht und teilweise auf der Trägerfolie liegen. Wichtig ist, dass seine Außenkontur vollständig auf der Releaseschicht liegt. Eine Motivform des teilflächigen Funktionsschichtaufbaus ist auch frei wählbar. Vorzugsweise sind die Motivformen der Releaseschicht und des Funktionsschichtaufbaus ähnlich, vorzugsweise identisch, nur dass die Releaseschicht den Funktionsschichtaufbau seitlich überragt, also eine größere Außenkontur besitzt.The functional layer structure offers the optically variable effect, e.g. B. a tilting effect, a security function of the security element transfer material. The functional layer structure is applied over part of the surface in such a way that its outer contour lies completely on the release layer. However, the functional layer structure as a whole does not have to lie completely on the release layer. For example, the functional layer structure can lie partly on the release layer and partly on the carrier film. It is important that its outer contour lies completely on the release layer. A motif form of the part-area functional layer structure can also be freely selected. The motif shapes of the release layer and the functional layer structure are preferably similar, preferably identical, except that the release layer protrudes laterally beyond the functional layer structure, ie has a larger outer contour.
Die Klebstoffschicht sorgt für eine gewünschte Verklebung des Funktionsschichtaufbaus mit dem Substrat des Wertgegenstands, insbesondere also einem Wertdokumentsubstrat, und weist zum Substrat eine stärkere Haftung auf als die Haftung zwischen der Trägerfolie und der Releaseschicht und, soweit der Funktionsschichtaufbau nicht vollständig auf der Releaseschicht liegt, als eine Haftung zwischen der Trägerfolie und dem Funktionsschichtaufbau. Die Klebstoffschicht wird auf den Funktionsschichtaufbau derart aufgebracht, dass sie den Funktionsschichtaufbau entweder exakt abdeckt oder über die Außenkontur des Funktionsschichtaufbaus bis zum Erreichen der Releaseschicht ein Stück weit hinausragt. "Ein Stück weit" heißt, dass die Klebstoffschicht eine Grenze der Releaseschicht nicht erreicht und nur geringfügig über den Funktionsschichtaufbau hinausragt, vorzugsweise so geringfügig, wie fertigungstechnisch möglich. Denn es ist letztlich die Klebstoffschicht, die die Kontur des von der Trägerfolie auf den Wertgegenstand übertragenen Sicherheitselements definiert. Ein Überstand der Klebstoffschicht sollte daher weniger als 2 mm, vorzugsweise weniger als 1 mm, besonders bevorzugt weniger als 0,5 mm betragen. Bei der Klebstoffschicht handelt es sich z. B. um eine Heißsiegellackschicht, die bei Einwirkung von Druck und erhöhter Temperatur aufschmilzt. Die Klebstoffschicht kann transparent sein und auf ein transparentes Fenster im Substrat des Wertgegenstands aufgebracht werden, sodass der optisch variable Effekt auch von der gegenüberliegenden Seite des Wertgegenstands erkennbar ist.The adhesive layer ensures the desired adhesion of the functional layer structure to the substrate of the object of value, in particular a value document substrate, and has stronger adhesion to the substrate than the adhesion between the carrier film and the release layer and, insofar as the functional layer structure is not completely on the release layer, than adhesion between the carrier film and the functional layer structure. The adhesive layer is applied to the functional layer structure in such a way that it either covers the functional layer structure exactly or protrudes a little beyond the outer contour of the functional layer structure until it reaches the release layer. "A little way" means that the adhesive layer does not reach a limit of the release layer and only slightly protrudes beyond the functional layer structure, preferably as slightly as possible in terms of production technology. Because it is ultimately the Adhesive layer that defines the contour of the security element transferred from the carrier film to the object of value. An overhang of the adhesive layer should therefore be less than 2 mm, preferably less than 1 mm, particularly preferably less than 0.5 mm. The adhesive layer is z. B. a heat-sealing lacquer layer that melts under the influence of pressure and elevated temperature. The adhesive layer can be transparent and applied to a transparent window in the substrate of the valuable, so that the optically variable effect can also be seen from the opposite side of the valuable.
Ein Kern des vorliegenden Verfahrens liegt darin, dass die Kontur der teilflächig aufgebrachten Klebstoffschicht im Wesentlichen den zu übertragenden Bereich des Sicherheitselement-Transfermaterials und damit die Kontur des Sicherheitselements definiert. Bei der späteren Übertragung wird nur das Sicherheitselement mittels der Klebstoffschicht mit dem Substrat des Wertgegenstands verklebt, während ein etwaiger nicht zu übertragender Bereich des Sicherheitselement-Transfermaterials aufgrund des Fehlens der Klebstoffschicht mit dem Substrat nicht verkleben kann. Das vorliegende Verfahren zum Herstellen des Sicherheitselement-Transfermaterials mit der von ihm ablösbaren Trägerfolie erfordert keine gitterartige Stabilisierungsschicht, keinen Stanzarbeitsgang und kein Entgittern. Somit ist die Herstellung einfach.A core of the present method lies in the fact that the contour of the adhesive layer applied over part of the area essentially defines the region of the security element transfer material to be transferred and thus the contour of the security element. During the subsequent transfer, only the security element is bonded to the substrate of the object of value by means of the adhesive layer, while any area of the security element transfer material that is not to be transferred cannot bond to the substrate due to the lack of the adhesive layer. The present method for producing the security element transfer material with the carrier film which can be detached from it does not require a grid-like stabilizing layer, a stamping operation or weeding. Thus, manufacturing is easy.
Vor dem Aufbringen der Klebstoffschicht kann ein Primer auf den Funktionsschichtaufbau derart aufgebracht werden, dass er den Funktionsschichtaufbau entweder exakt abdeckt oder über die Außenkontur des Funktionsschichtaufbaus bis zum Erreichen der Releaseschicht ein Stück weit hinausragt. Die Klebstoffschicht wird dann auf den Primer aufgebracht. Der Primer dient dazu, die Verklebung zwischen dem Funktionsschichtaufbau und der Klebstoffschicht zu verbessern.Before the adhesive layer is applied, a primer can be applied to the functional layer structure in such a way that it either covers the functional layer structure exactly or protrudes a little beyond the outer contour of the functional layer structure until it reaches the release layer. The adhesive layer is then applied to the primer. The primer serves to improve the bond between the functional layer structure and the adhesive layer.
In einer Ausgestaltung wird, wie bereits erwähnt, die Releaseschicht auf die Trägerfolie nur teilflächig aufgebracht, derart dass die Außenkontur der Releaseschicht über die Außenkontur des Funktionsschichtaufbaus rundherum hinausragt. Durch den hinausragenden Teil der Releaseschicht wird eine Verklebung zwischen der Klebstoffschicht und der Trägerfolie effektiv vermieden. Eine solche Verklebung ist unerwünscht, weil sie das spätere Ablösen der Trägerfolie vom Sicherheitselement-Transfermaterial verhindern und zum Brechen des Sicherheitselements führen kann.In one embodiment, as already mentioned, the release layer is only applied to part of the surface of the carrier film, such that the outer contour of the release layer protrudes all around over the outer contour of the functional layer structure. The protruding part of the release layer effectively prevents adhesion between the adhesive layer and the carrier film. Such an adhesion is undesirable because it prevents the carrier film from being detached later from the security element transfer material and can lead to the security element breaking.
Im Falle einer nur teilflächig aufgebrachten Releaseschicht wird der Funktionsschichtaufbau derart erzeugt, dass er entweder vollständig auf der teilflächigen Releaseschicht liegt oder eine Innenkontur der teilflächigen Releaseschicht überragt. Bei der ersten Variante liegt der Funktionsschichtaufbau vollständig zwischen der Klebstoffschicht und der Releaseschicht, während er bei der zweiten Variante einseitig vollständig von der Klebstoffschicht und auf der anderen Seite teilweise von der Releaseschicht und teilweise von der Trägerfolie bedeckt wird. Im Vergleich zu der ersten Variante lässt sich das Sicherheitselement-Transfermaterial gemäß der zweiten Variante noch dünner herstellen. Insbesondere schaut ein Betrachter das auf den Wertgegenstand aufgebrachte Sicherheitselement unmittelbar auf den Funktionsschichtaufbau und nicht durch die Releaseschicht hindurch, sodass der optisch variable Effekt besonders gut zur Wirkung kommt.In the case of a release layer applied only over part of the area, the functional layer structure is produced in such a way that it either lies completely on the release layer over part of the area or protrudes beyond an inner contour of the release layer over part of the area. In the first variant, the functional layer structure lies completely between the adhesive layer and the release layer, while in the second variant it is completely covered on one side by the adhesive layer and on the other side partially by the release layer and partially by the carrier film. In comparison to the first variant, the security element transfer material according to the second variant can be produced even thinner. In particular, an observer looks at the security element applied to the object of value directly at the functional layer structure and not through the release layer, so that the optically variable effect is particularly effective.
Sofern der Funktionsschichtaufbau vollständig auf der Releaseschicht liegt, ist die Releaseschicht vorzugsweise transparent oder zumindest transluzent, um den optisch variablen Effekt des Funktionsschichtaufbaus nicht zu behindern. Denn die Releaseschicht ist die oberste Schicht des letztlich auf den Wertgegenstand aufgebrachten Sicherheitselements, durch die ein Betrachter hindurchblickt. Die Releaseschicht kann auch weitere Sicherheitsmerkmale aufweisen, z. B. Interferenzschichtpigmente, Flüssigkristallpigmente oder Fluoreszenzstoffe. Sofern aber der Funktionsschichtaufbau nur mit seiner Außenkontur auf der Releaseschicht liegt, kann die Releaseschicht auch opak sein und eine Art Rahmen für den optisch variablen Effekt des Funktionsschichtaufbaus bilden.If the functional layer structure lies completely on the release layer, the release layer is preferably transparent or at least translucent in order not to impede the optically variable effect of the functional layer structure. This is because the release layer is the uppermost layer of the security element that is ultimately applied to the object of value and through which an observer can see. The release layer can also have other security features, e.g. B. interference layer pigments, liquid crystal pigments or fluorescent substances. If, however, the functional layer structure lies only with its outer contour on the release layer, the release layer can also be opaque and form a kind of framework for the optically variable effect of the functional layer structure.
Beim Schritt des Erzeugens des Funktionsschichtaufbaus wird in einer Ausführungsform eine Prägeschicht aufgebracht, in die ein Motiv geprägt wird. Die Prägeschicht kann beispielsweise eine UV-Prägelackschicht sein, die derart aufgebracht, z. B. gedruckt, wird, dass sie mit ihrer Außenkontur vollständig auf der Releaseschicht liegt.In one embodiment, in the step of producing the functional layer structure, an embossing layer is applied, into which a motif is embossed. The embossing layer can be, for example, a UV embossing lacquer layer which is applied in such a way, e.g. B. printed, that it is completely with its outer contour on the release layer.
Anschließend wird eine Metallisierungsschicht auf das geprägte Motiv aufgebracht, um eine metallisierte Prägeschicht als Funktionsschichtaufbau zu erzeugen. Die Strukturen der Prägeschicht können so klein sein, dass sie diffraktiv wirken und einen holographischen Effekt erzeugen, oder sie können größer sein und mit der Metallisierungsschicht Mikrospiegel bilden. Die metallisierte Prägeschicht weist so einen Kippeffekt auf, bei dem sich ein optisches Erscheinungsbild abhängig vom Betrachtungswinkel ändert.A metallization layer is then applied to the embossed motif in order to create a metallized embossed layer as a functional layer structure. The structures of the embossing layer can be so small that they act diffractively and produce a holographic effect, or they can be larger and form micromirrors with the metallization layer. The metallized embossing layer thus exhibits a tilting effect in which an optical appearance changes depending on the viewing angle.
Vor dem Aufbringen der Metallisierungsschicht kann eine Waschfarbeschicht auf die Prägeschicht derart aufgebracht werden, dass die Waschfarbeschicht die Prägeschicht nur teilweise bedeckt. Nach dem Aufbringen der Metallisierungsschicht wird die Waschfarbeschicht mit der darüber liegenden Metallisierungsschicht durch Waschen entfernt, sodass die Metallisierungsschicht mindestens ein Muster oder Zeichen bildet, z. B. als Negativschrift (Cleartext). Anstatt mittels der Waschfarbeschicht kann die Metallisierungsschicht alternativ durch Ätzen oder Laser teilweise demetallisiert werden. Die demetallisierten Bereiche der Metallisierungsschicht erzeugen zusätzlich einen Durchsichteffekt, der bei Betrachtung im Durchlicht das Muster oder Zeichen besonders deutlich erkennen lässt.Before applying the metallization layer, a wash color layer can be applied to the embossing layer in such a way that the wash color layer only partially covers the embossing layer. After the metallization layer has been applied, the wash color layer with the overlying metallization layer is removed by washing so that the metallization layer forms at least one pattern or character, e.g. B. as negative writing (clear text). Alternatively, the metallization layer may be partially demetallized by etching or laser instead of by the wash-color layer. The demetallized areas of the metallization layer also produce a see-through effect, which allows the pattern or character to be recognized particularly clearly when viewed in transmitted light.
Um sicherzustellen, dass das Sicherheitselement beim späteren Ablösen der Trägerfolie vom Sicherheitselement-Transfermaterial möglichst scharfe Konturen erhält, kann eine geschlossene oder unterbrochene Stanzlinie durch die Klebstoffschicht und die Releaseschicht vorgesehen werden, die z. B. mittels eines mechanischen Stanzwerkzeugs oder Lasers auf der Trägerfolie erzeugt wird. Die Stanzlinie ist für das Ablösen der Trägerfolie vom Sicherheitselement-Transfermaterial nicht zwingend, weil die Umrisskontur im Wesentlichen durch die Kontur der Klebstoffschicht vorgegeben wird. Die Stanzlinie stellt demgegenüber jedoch einen sauberen und scharfen Ablösungsrand sicher.In order to ensure that the security element has contours that are as sharp as possible when the carrier film is later detached from the security element transfer material, a closed or interrupted punching line can be provided through the adhesive layer and the release layer. B. is generated by means of a mechanical punching tool or laser on the carrier film. The punching line is not essential for detaching the carrier film from the security element transfer material, because the contour is essentially predetermined by the contour of the adhesive layer. However, the die-cut line ensures a clean and sharp detachment edge.
Ein zweiter Aspekt der vorliegenden Offenbarung betrifft ein entsprechendes Sicherheitselement-Transfermaterial als solches. Das Sicherheitselement-Transfermaterial umfasst eine Trägerfolie, eine Releaseschicht, die auf die Trägerfolie aufgebracht ist, einen Funktionsschichtaufbau, der eine oder mehrere übereinanderliegende Schichten umfasst und einen optisch variablen Effekt aufweist und der mit einer Außenkontur vollständig auf der Releaseschicht liegt, und eine Klebstoffschicht, die registergenau auf dem Funktionsschichtaufbau derart aufgebracht ist, dass sie über die Außenkontur des Funktionsschichtaufbaus bis zum Erreichen der Releaseschicht ein Stück weit hinausragt.A second aspect of the present disclosure relates to a corresponding security element transfer material as such. The security element transfer material comprises a carrier foil, a release layer which is applied to the carrier foil, a functional layer structure which comprises one or more superimposed layers and has an optically variable effect and the with an outer contour lying completely on the release layer, and an adhesive layer which is applied in register to the functional layer structure in such a way that it protrudes a little beyond the outer contour of the functional layer structure until it reaches the release layer.
Ein dritter Aspekt der vorliegenden Offenbarung betrifft ein Verfahren zum Herstellen eines Wertgegenstands, bei dem das Sicherheitselement-Transfermaterial gemäß entweder dem ersten Aspekt der vorliegenden Offenbarung hergestellt oder dem zweiten Aspekt der vorliegenden Offenbarung bereitgestellt wird, ein Substrat eines Wertgegentands, z. B. ein Wertdokumentsubstrat, bereitgestellt wird, das Sicherheitselement-Transfermaterial mit dem Substrat mittels der Klebstoffschicht des Sicherheitselement-Transfermaterials verklebt wird, und die Trägerfolie von dem Sicherheitselement-Transfermaterial abgelöst wird, sodass das Sicherheitselement auf dem Wertgegenstand verbleibt. Das Sicherheitselement erlaubt eine Überprüfung der Echtheit des Wertgegenstands und dient zugleich als Schutz vor unerlaubter Reproduktion.A third aspect of the present disclosure relates to a method for producing an object of value, in which the security element transfer material is produced according to either the first aspect of the present disclosure or the second aspect of the present disclosure is provided, a substrate of an object of value, e.g. B. a value document substrate, is provided, the security element transfer material is bonded to the substrate by means of the adhesive layer of the security element transfer material, and the carrier film is detached from the security element transfer material, so that the security element remains on the object of value. The security element allows the authenticity of the valuable to be checked and at the same time serves as protection against unauthorized reproduction.
Bei dem Substrat des Wertgegenstands handelt es sich z. B. um ein Papiersubstrat, Polymersubstrat, oder Verbundsubstrat zur Herstellung von Wertdokumenten wie Banknoten, Ausweisen, Aktien, Urkunden, Briefmarken, Schecks, Eintrittskarten, Fahrkarten oder Flugscheinen.The substrate of the valuable is z. B. a paper substrate, polymer substrate, or composite substrate for the production of documents of value such as banknotes, ID cards, shares, certificates, stamps, checks, tickets, tickets or airline tickets.
Wenn die Klebstoffschicht eine Heißsiegellackschicht umfasst, erfolgt eine Erwärmung entweder vollflächig über das gesamte Sicherheitselement-Transfermaterial oder nur in dem Bereich, wo sich die Heißsiegellackschicht befindet. Zum Aushärten der Klebstoffschicht wird die Klebstoffschicht vorzugsweise mittels UV-Strahlung aktiviert.If the adhesive layer comprises a heat-seal lacquer layer, heating takes place either over the entire security element transfer material or only in the area where the Heat seal lacquer layer is located. In order to cure the adhesive layer, the adhesive layer is preferably activated by means of UV radiation.
Weitere Ausführungsbeispiele sowie Vorteile werden nachfolgend anhand der schematisch stark vereinfachten Figuren erläutert, bei deren Darstellung auf eine maßstabs- und proportionsgetreue Wiedergabe verzichtet wird, um die Anschaulichkeit zu erhöhen. Darin zeigen:
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Fig. 1 schematisch eine Banknote 1mit einem Sicherheitselement 12, -
Fig. 2 eine Aufsicht auf ein Sicherheitselement-Transfermaterial 10 umfassend eine endlose Trägerfolie 16, auf der eineMehrzahl von Sicherheitselementen 12 aufgebracht ist, -
Fig. 3 schematisch ein erstes Ausführungsbeispiel des Sicherheitselement-Transfermaterials 10 im Querschnitt, -
Fig. 4 schematisch ein zweites Ausführungsbeispiel des Sicherheitselement-Transfermaterials 10 im Querschnitt, -
Fig. 5 schematisch ein drittes Ausführungsbeispiel des Sicherheitselement-Transfermaterials 10 im Querschnitt, -
Fig. 6 schematisch ein viertes Ausführungsbeispiel des Sicherheitselement-Transfermaterials 10 im Querschnitt, -
Fig. 7 schematisch das Sicherheitselement-Transfermaterial 10 ausFig. 6 auf einem Banknotensubstrat 14 im Querschnitt, -
Fig. 8 die Anordnung ausFig. 7 mit vom Sicherheitselement 12abgelöster Trägerfolie 16 im Querschnitt, -
Fig. 9 schematisch ein fünftes Ausführungsbeispiel des Sicherheitselement-Transfermaterials 10 im Querschnitt, und -
Figuren 10A bis 10F schematisch einzelne Verfahrensstadien beim Herstellen und Applizieren eines sechsten Ausführungsbeispiels des Sicherheitselement-Transfermaterials 10 im Querschnitt.
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1 schematically abanknote 1 with asecurity element 12, -
2 a top view of a securityelement transfer material 10 comprising anendless carrier film 16 on which a plurality ofsecurity elements 12 is applied, -
3 schematically a first embodiment of the securityelement transfer material 10 in cross section, -
4 schematically a second embodiment of the securityelement transfer material 10 in cross section, -
figure 5 schematically a third embodiment of the securityelement transfer material 10 in cross section, -
6 schematically a fourth embodiment of the securityelement transfer material 10 in cross section, -
7 schematically the securityelement transfer material 10 from6 on abanknote substrate 14 in cross section, -
8 the arrangement7 with thecarrier film 16 detached from thesecurity element 12 in cross section, -
9 schematically a fifth embodiment of the securityelement transfer material 10 in cross section, and -
Figures 10A to 10F schematically individual process stages in the production and application of a sixth exemplary embodiment of the securityelement transfer material 10 in cross section.
In den bisher beschriebenen Ausführungsbeispielen ist der Funktionsschichtaufbau 70 einschichtig, z. B. eine Druckschicht mit Interferenzschichtpigmenten oder Flüssigkristallpigmenten.
Claims (15)
eine Klebstoffschicht (50), die registergenau auf dem Funktionsschichtaufbau (70) derart aufgebracht ist, dass sie über die Außenkontur (71) des Funktionsschichtaufbaus (70) bis zum Erreichen der Releaseschicht (22) ein Stück weit hinausragt.
an adhesive layer (50) which is applied to the functional layer structure (70) in register in such a way that it protrudes a little beyond the outer contour (71) of the functional layer structure (70) until it reaches the release layer (22).
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DE102022000409.7A DE102022000409A1 (en) | 2022-02-03 | 2022-02-03 | Security element transfer material and method of making same |
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DE102013108906A1 (en) * | 2013-08-19 | 2015-02-19 | Ovd Kinegram Ag | System and method for producing an individualized security element |
DE102016009318A1 (en) | 2016-08-02 | 2018-02-08 | Giesecke+Devrient Currency Technology Gmbh | Method and transfer film for transferring motif-shaped security elements onto a target substrate |
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DE3932505C2 (en) | 1989-09-28 | 2001-03-15 | Gao Ges Automation Org | Data carrier with an optically variable element |
DE4423291A1 (en) | 1994-07-02 | 1996-01-11 | Kurz Leonhard Fa | Embossing foil, in particular hot stamping foil with decoration or security elements |
TR201808896T4 (en) | 2002-12-02 | 2018-07-23 | Avery Dennison Corp | Heat transfer label. |
JP6648756B2 (en) | 2015-03-26 | 2020-02-14 | 大日本印刷株式会社 | Transfer medium |
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2022
- 2022-02-03 DE DE102022000409.7A patent/DE102022000409A1/en active Pending
- 2022-11-08 EP EP22020540.5A patent/EP4230426A1/en active Pending
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DE102013108906A1 (en) * | 2013-08-19 | 2015-02-19 | Ovd Kinegram Ag | System and method for producing an individualized security element |
DE102016009318A1 (en) | 2016-08-02 | 2018-02-08 | Giesecke+Devrient Currency Technology Gmbh | Method and transfer film for transferring motif-shaped security elements onto a target substrate |
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