EP2340175A2 - Method for the production of security elements having mutually registered designs - Google Patents
Method for the production of security elements having mutually registered designsInfo
- Publication number
- EP2340175A2 EP2340175A2 EP09777643A EP09777643A EP2340175A2 EP 2340175 A2 EP2340175 A2 EP 2340175A2 EP 09777643 A EP09777643 A EP 09777643A EP 09777643 A EP09777643 A EP 09777643A EP 2340175 A2 EP2340175 A2 EP 2340175A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- security element
- layer
- adhesive
- functional layer
- functional
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000002346 layers by function Substances 0.000 claims abstract description 208
- 239000000853 adhesive Substances 0.000 claims abstract description 92
- 230000001070 adhesive effect Effects 0.000 claims abstract description 92
- 239000012790 adhesive layer Substances 0.000 claims abstract description 77
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000010410 layer Substances 0.000 claims description 128
- 239000000758 substrate Substances 0.000 claims description 71
- 238000004049 embossing Methods 0.000 claims description 38
- 239000004922 lacquer Substances 0.000 claims description 34
- 229920002120 photoresistant polymer Polymers 0.000 claims description 27
- 238000001465 metallisation Methods 0.000 claims description 21
- 239000002131 composite material Substances 0.000 claims description 13
- 238000004132 cross linking Methods 0.000 claims description 4
- 230000001143 conditioned effect Effects 0.000 claims 4
- 230000003750 conditioning effect Effects 0.000 claims 2
- 230000001678 irradiating effect Effects 0.000 claims 2
- 230000005855 radiation Effects 0.000 description 24
- 239000000976 ink Substances 0.000 description 20
- 238000000576 coating method Methods 0.000 description 15
- 239000000654 additive Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 12
- 230000010287 polarization Effects 0.000 description 11
- 238000007639 printing Methods 0.000 description 11
- 238000005406 washing Methods 0.000 description 11
- 239000000049 pigment Substances 0.000 description 10
- 239000010408 film Substances 0.000 description 9
- 239000011888 foil Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 238000000926 separation method Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 238000007906 compression Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 6
- 238000001723 curing Methods 0.000 description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000011241 protective layer Substances 0.000 description 6
- 238000003847 radiation curing Methods 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 5
- 239000012876 carrier material Substances 0.000 description 4
- 125000002091 cationic group Chemical group 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 235000012489 doughnuts Nutrition 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- 229920002799 BoPET Polymers 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910003930 SiCb Inorganic materials 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000003848 UV Light-Curing Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000004920 heat-sealing lacquer Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000012939 laminating adhesive Substances 0.000 description 1
- 238000000608 laser ablation Methods 0.000 description 1
- 238000010329 laser etching Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920003009 polyurethane dispersion Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000005510 radiation hardening Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/21—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose for multiple purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/324—Reliefs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/351—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
- B42D25/355—Security threads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—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
- B42D25/405—Marking
- B42D25/425—Marking by deformation, e.g. embossing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
- B42D25/405—Marking
- B42D25/43—Marking by removal of material
- B42D25/445—Marking by removal of material using chemical means, e.g. etching
-
- 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
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
- B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
- B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
- B44C1/17—Dry transfer
- B44C1/1704—Decalcomanias provided with a particular decorative layer, e.g. specially adapted to allow the formation of a metallic or dyestuff layer on a substrate unsuitable for direct deposition
-
- B42D2035/08—
-
- B42D2035/24—
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1039—Surface deformation only of sandwich or lamina [e.g., embossed panels]
Definitions
- the invention relates to a method for producing a security element with two or more motif layers matched to one another, in particular motif layers having characters visually recognizable in transmitted light and preferably also in incident light, a security element obtainable by the method, the security element designed as a transfer element, the use of the security element or transfer element for product assurance, a valuables item equipped with the security element and a method for producing such a valuables item.
- Valuables in particular value documents, such as banknotes, shares, identity cards, credit cards, certificates, checks, and other forgery-prone papers, such as identification documents of various kinds, but also branded goods and packaging of branded goods are often provided with security elements to secure, checking their authenticity while protecting against unauthorized reproduction.
- the security elements may, for example, take the form of security threads or stickers or any other form insertable or attachable to a valuable article or security paper, a "valuable article" within the meaning of the present invention being any objectionable to counterfeiting, in particular a value document, while a "security paper "represents the precursor to a value document, which can not yet be processed.
- Security elements are typically multilayer elements with multiple functional layers.
- Functional layers are generally layers that have any properties that can be detected visually or by machine. Functional layers therefore contain, for example, dyes, luminescent substances, thermochromic substances, liquid crystals. metals, interference pigments, electrically conductive substances, magnetic substances, light-diffractive or refractive structures or combinations thereof.
- the functional layers are usually designed as geometric or figurative patterns or motifs, ie there are functional areas within a layer with the detectable property (for example luminescence) and recesses in between.
- Negative-type security elements comprise a transparent substrate having at least one non-transparent coating having recesses (the negative writing). These recesses may have any shapes, such as letters, numbers or patterns of any kind, especially line patterns.
- negative writing accordingly comprises recesses of any shape, ie any non-solidity in a non-transparent coating
- the negative writing is clearly recognizable in incident light, and in transmitted light only in the case of less transparent substrates
- a negative-type security element has two different functional layers, for example a motif in the form of a gold-colored metallic coating and the same motif as a red printing ink , so this motif appears golden to the viewer from one side, red from the other side.
- WO 92/11142 it is known to produce negative writings in functional layers by means of heat-activatable printing inks.
- the printing inks are printed in the form of the desired Negativschrif t below the functional layers and contain waxes or intumescent additives which soften when heated or split off a gas and thereby produce foam structures.
- the adhesion in the areas which can be printed with the activatable ink is reduced, and the functional layers can be removed mechanically in these areas.
- DE 102007055 112 A1 discloses a method for register-based, ie congruent, formation of a negative writing in a plurality of functional layers by means of a printed in the form of trainees negative typeface under the functional layers ink containing a component that causes a process on irradiation or heating or in contact with a washing liquid, which causes the part of the ink on the overlying coating a force is exercised, which breaks the coating.
- This force can be exerted by a gas generated from constituents of the printing ink when they come into contact with washing liquid, irradiated and / or heated, or by a swelling agent in the printing ink, which swells upon contact with a washing liquid. Once the multilayer coating has been broken, it is relatively easily accessible for washing with washing liquid.
- the object of the present invention is, in particular, to provide such a method, with which congruent motifs can be formed with sharp contours and with high register accuracy.
- the objects are achieved by the method for producing a security element having the features specified in claim 1, by the security element having the features specified in claim 8, by the transfer material having the features specified in claim 15, by the security paper or the valuable article according to claim 16 and by the method according to claim 17.
- the basic idea of the present invention is to transfer the motif of a functional layer into another functional layer with the aid of an adhesive layer.
- an exact image of the motif of the first functional layer is reproduced in the adhesive layer, and this image of the motif in the adhesive layer is in turn used to produce a precise image Reproduce the image of this motif or its photographic negative in another functional layer.
- the transfer of the motif from one functional layer to the other is achieved by structuring the adhesive between the functional layers with the aid of the motif of the first functional layer such that it adheres only to certain regions of the second functional layer, with the other regions of the second functional layer However, no adhesive bond is received.
- the non-bonded regions of the second functional layer are then removed, while the bonded regions can not be removed, whereby an exact reproduction or a photographic negative of the motif of the first functional layer arises in the second functional layer.
- the security element according to the invention is produced from at least two partial elements.
- a first sub-element consists at least of a carrier substrate and a functional layer with recesses therein. Additional layers may be present.
- the functional layer can also be composed of several individual layers.
- the carrier substrate of the first security element partial element is preferably a film, for example made of polypropylene, polyethylene, polystyrene, polyester, in particular polycarbonate or polyethylene terephthalate. Transparent or translucent films are particularly preferred. When such films are used, the recesses formed in the exact register in the individual functional layers can be clearly recognized as negatives.
- the functional layer can basically be of any type as used in security elements.
- metal layers from for example aluminum, iron, copper, gold, nickel, etc., metal alloys, or layers of metallic effect paints, layers with color pigments or fluorescent pigments, liquid crystal layers, coatings with a color shift effect, layer combinations, such as a color-shaded layer with a specific color, Layers with machine-detectable features, for example, with magnetic pigments, which can be hidden under a cover layer if necessary.
- the mentioned layer with color pigments it may, for. Example, a black ink based on "Microlith Black" (Ciba), which forms a dark background for example, liquid crystal layers in the security element according to the invention, which allows the generation of impressive color shift effects.
- the application of the functional layers is carried out by known methods that are suitable for the respective functional layer, for example by physical vapor deposition (PVD) in metals or by printing on color pigments or fluorescent pigments.
- PVD physical vapor deposition
- functional layers are printed on, they can, if desired, already be printed in the form of the functional layer motif, i. H. in the form of functional areas and recesses between these areas. In all other cases, there is a full-surface application of the functional layer, whereby of course also printed functional layers can be printed over the entire surface.
- the functional layer can be formed directly on the carrier substrate, or one or more intermediate layers can be provided.
- intermediate layers are absolutely necessary, for example if the motif of the functional layer is is a metallized hologram, kinegram, pixelgram or other metallized diffraction structure.
- embossing lacquer layer is applied and embossed into the embossing lacquer layer, before or after the metallization, the desired diffractive structure.
- an intermediate layer is generally required which ensures a suitable orientation of the liquid crystals. Suitable orientation layers can be, for example, embossed lacquer layers embossed diffractive structures.
- the carrier film can also be suitably treated.
- one of the motif layers is a metallized diffraction structure, such as a metallized hologram, and a further motif layer is particularly preferably a metallized diffraction structure, such as a metallized hologram.
- a metallized diffraction structure such as a metallized hologram
- a further motif layer is particularly preferably a metallized diffraction structure, such as a metallized hologram.
- an embossing lacquer layer containing the desired structure information is to be provided.
- the structure information is transmitted when glued to the second security element subelement.
- Materials for embossing lacquer layers are known to a person skilled in the art. Suitable embossing lacquers are disclosed, for example, in DE 102004 035 979 A1, which discloses heat-sealing lacquers which can likewise be used as embossing lacquer.
- the functional layer is structured to produce a motif, ie, certain areas are removed from the functional layer. The remaining functional areas and the recesses together form the motif, which can be any geometric or figurative representation.
- the motif can also form an encoding, or the shape of the recesses can be designed so that the recesses are perceived by a viewer as the "motif".
- Methods for producing the recesses are known. Suitable examples are laser ablation, etching and washing procedures. Etching processes are particularly suitable for metallic functional layers. On the metallic layer, a photoresist is applied and exposed through a mask in the form of the desired motif. In the case of positive-working photoresists, the areas of the later recesses must be exposed; for later-acting photoresists, the later functional areas must be exposed. After exposure, the photoresist in the soluble areas is removed by developer and the metal layer in the exposed areas is etched away by etchants such as caustics or acids to form the desired recesses.
- washing processes are universally applicable. Suitable washing processes are disclosed, for example, in WO 99/13157, WO 92/11142, WO 97/23357 and in DE 10 2007 055 112. Particularly suitable is the process disclosed in DE 10 2007 055 112, with which thicker coatings, for example multi-layer coatings, are also suitable , can be removed. If this method is used in the present invention, a special printing ink is applied to the carrier substrate or an intermediate layer, if present, at least under the functional layer, in the regions in which recesses are to be formed in the functional layer. prints.
- the printing ink contains a reactive constituent and / or a precursor of a reactive constituent which, on contact with a washing liquid, causes a process which leads to a break-up of the regions of the functional layer lying above the ink, and / or a reactive constituent which is present Irradiation or when heated causes a process that leads to a rupture of lying over the ink areas of the functional layer.
- the reactive component in the ink is, for example, a component of a two-component gas evolution system such as a carbonate or a hydrogencarbonate, wherein the second component of the two-component gas evolution system, for example an acid such as citric acid or tartaric acid, is contained in the scrubbing liquid.
- the functional layer On contact with the washing liquid, a small amount of acid penetrates the ink through the functional layer, a gas develops and the functional layer is broken up at the appropriate point and can now be easily removed, if necessary with mechanical assistance.
- swelling agents contained in the printing ink for example starch or cellulose derivatives, swell on contact with a washing liquid, such as water, and break up the functional layer.
- the ink may contain blowing agents which release a gas upon irradiation and / or heating, such as azoisobutyric acid nitrile, which in turn results in an increase in pressure under the functional layer and rupture of the functional layer in the areas printed with the ink.
- blowing agents which release a gas upon irradiation and / or heating, such as azoisobutyric acid nitrile, which in turn results in an increase in pressure under the functional layer and rupture of the functional layer in the areas printed with the ink.
- the broken-up areas of the functional layer can now be easily washed out together with
- the second security element subelement has, like the first security element subelement, at least two layers, namely a carrier substrate and a functional layer formed thereon. In addition, other layers may be present or need to be present as stated above for the first security element subelement.
- the carrier substrate of the second security element subelement is later separated together with parts of the functional layer of the second security element subelement, for. B.
- isolation winding eg, the parts of the functional layer, which are arranged in the composite security element via recesses in the functional layer of the first security element subelement
- carrier substrate from other parts of the functional layer of the second security element subelement
- the functional layer has only a slight adhesion to the carrier substrate.
- the adhesive force between the carrier substrate and the functional layer is too high, it can be reduced by treating the carrier substrate with suitable additives.
- suitable additives are, for example, surface-active substances, defoamers or thickeners.
- any intermediate layers present between the carrier substrate and the functional layer for example embossing lacquer layers for a hologram. If such an embossing lacquer layer or other intermediate layer is to be taken off together with the carrier substrate, the adhesive force between the intermediate layer and the functional layer, ie for example between the embossing lacquer layer and a metallization applied thereon, must be correspondingly low. If the adhesive force is too high, the intermediate layer should be treated with the additives mentioned.
- the first security element subelement, which has a functional layer with functional regions and recesses, and the second security element subelement, which has a functional layer without recesses, are connected to one another with the aid of an adhesive layer.
- a suitable adhesive layer may possibly already be present on the first security element subelement, namely if the recesses were produced in the functional layer of the first security element subelement with the aid of a stickable resist.
- the recesses are produced by coating with photoresist, exposing by means of an external mask, developing and etching away the areas of the functional layer which are no longer protected by photoresist. On the other areas of the functional layer, the functional areas, there is still photoresist material, which is necessarily congruent with the functional areas.
- this photoresist material can be used as the adhesive layer. If an unsuitable photoresist has been used or if the photoresist areas are no longer sufficiently intact for exact bonding, the photoresist is removed and then moved as in all other cases in which the recesses in the functional layer of the first security element subelement are used Photoresists were generated.
- the photoresist used may be a positive photoresist such as AZ 1512 (AZ 1500 series) or AZ P 4620 from Clariant or S 1822 from Shipley, which is applied in an areal density of about 0.1 g / m 2 to about 40 g / m 2 .
- a radiation-curing, preferably a UV-curing, or a radiation-activatable, adhesive is used for bonding the first security element partial element and the second security element partial element.
- the adhesive force of the adhesive is changed by irradiation using the functional layer of the first security element sub-element as a mask so that substantially no adhesive force is left either in the recess regions while in the functional areas the adhesive force remains essentially unchanged, or alternatively the adhesive is activated in the recess areas, but remains inactive in the functional areas.
- the first case is described below. For the latter, with respect to the adhesive and the non-adhesive regions of the adhesive layer, and thus with regard to the bonded and the separated regions of the functional layer of the second security element partial element, the reverse applies in each case.
- the adhesive is applied to the first security element sub-element on the functional layer.
- the adhesive-coated security element partial element is irradiated from the side of the carrier foil, ie, through the functional layer, with radiation of a suitable wavelength.
- the adhesive cures in the areas in which the functional layer has recesses, and is thereby deactivated.
- the radiation is completely or at least largely shielded and the adhesive force of the adhesive therefore remains unchanged or at least substantially unchanged.
- the second security element partial element is then placed on the adhesive layer such that its functional layer contacts the adhesive layer.
- the two sub-elements are pressed together, optionally at elevated temperature, whereby the adhesive layer in the non-deactivated areas glued to the functional layer of the second security element sub-element. Since the adhesive-capable areas of the adhesive layer correspond in dimension and shape to the functional areas of the functional layer of the first security element partial element, the bonding to the functional layer of the second security element partial element takes place in such a way that it exactly matches the motif of the functional layer of the first security element partial element reproduces. Then, if necessary, irradiated again to further crosslink the adhesive in the previously or barely irradiated areas and thus protect the structure against destruction in the following steps.
- the carrier foil of the second security element partial element is pulled off, optionally together with intermediate layers between carrier foil and functional layer, the functional layer in the non-bonded regions is deducted with, while it can not be deducted in the bonded areas, of course, so that a security element with two completely congruent motifs arises.
- the second motif layer may optionally be covered with a protective layer.
- This orientation of the security element sub-elements to each other should also be selected when an existing photoresist is used as an adhesive.
- the radiation-crosslinkable adhesive is applied to the first security element partial element, but to the carrier film, not to the functional layer as in the first variant.
- the adhesive is deactivated by irradiation with a suitable wavelength using the first functional layer as an exposure mask in the areas of the recesses of the first functional layer, while maintaining its adhesive strength unchanged or at least substantially unchanged in the other areas. Due to the greater distance between the exposure mask and the adhesive layer, the image of the motif of the functional layer in the adhesive may not be as accurate as in the first variant.
- the second security element partial element is placed with its functional layer on the adhesive layer of the first security element partial element and moved as in the first variant. In the already crosslinked, ie hardened, areas of the adhesive layer, no bonding takes place with the functional layer of the second security element partial element, so that the two functional layers of the resulting security element have congruent recesses.
- the adhesive layer is applied to the functional layer of the second security element partial element.
- the two security element subelements in order for the functional layer of the first security element subelement to be used as an exposure mask, the two security element subelements must first be assembled before the irradiation.
- the assembly can be effected, for example, in such a way that the functional layer of the first security element partial element adjoins the adhesive layer.
- care must be taken that no premature bonding takes place, ie it must be used an adhesive that does not stick the two security element sub-elements when merely joining, but only under increased pressure and optionally at elevated temperature causes bonding. Suitable adhesives are given below.
- the composite security element sub-elements are then irradiated through the functional layer of the first security element sub-element, whereby the adhesive is cured in the not shielded by the functional layer areas and deactivated, but not in the shielded by the functional layer areas. Due to the immediate proximity of the adhesive layer and the exposure nipples, as in the first variant, an extremely good fidelity of the image of the motif of the first security element partial element in the adhesive layer is achieved. This motif is passed on to the functional layer of the second security element partial element, whereby the separation of the functional layer of the second security element partial element from the carrier substrate or the carrier substrate and further layers also requires the adhesive layer to be severed. This can lead to a slightly lower edge sharpness than in the first variant. Variant 4:
- the adhesive is applied to the functional layer of the second security element partial element, as in variant 3.
- the two security element partial elements are assembled in such a way that the carrier substrate of the first security element partial element is glued to the adhesive layer. Otherwise, as in variant 3, d. H. It must be used an adhesive that does not stick the two security element sub-elements in the mere loose assembly yet. Then, it is irradiated through the functional layer of the first security element partial element, with the adhesive curing in the unshielded regions. Subsequently, the two security element sub-elements are interconnected under increased pressure and optionally elevated temperature. If necessary, re-radiation is applied to achieve good curing in the screened adhesive areas.
- the carrier substrate, and possibly further layers, of the second security element partial element are removed together with the non-bonded regions of the functional layer.
- the regions of the functional layer remaining on the adhesive layer can be covered with a protective layer.
- the distance between the exposure mask and the adhesive layer is greater in the case of irradiation than in variant 3.
- the image of the motif of the functional layer of the first security element partial element in the adhesive layer, and thus the transmission into the functional layer of the second security element partial element, is therefore not complete as precise as in variant 3.
- the compression of the two security elements sub-elements can be done in one or more stages. That the two sub-elements are preferably pressed together at elevated temperature in a heat roller with a (single-stage compression) or more so-called calender rolls (multi-stage compression), or but the two sub-elements are pressed against each other at several heat rollers, each equipped with one or more so-called calender rolls ( multi-stage compression).
- the multi-stage compression can, depending on the respective embodiment, lead to a particularly strong connection of the safety element partial elements. When using several heating rollers and temperature profiles during compression can be realized.
- the process sequence of variants 3 and 4 can also be applied when the adhesive is applied to the first security element sub-element, ie, the two security element sub-elements can first loosely assembled, then irradiated, and finally connected together under pressure and optionally elevated temperature.
- a suitable adhesive must be used, ie an adhesive, which ensures that no bonding takes place with the areas of the functional layer of the second security element sub-element, which is to be removed to form recesses.
- Suitable bonding conditions are typically about 60 0 C to 160 0 C and a line pressure of, typically, 0.1 N / mm to 15 N / mm, more preferably from about 5 N / mm.
- Suitable adhesives are disclosed, for example, in DE 10 2004 035 979 A1. They are adhesives, in particular dispersion adhesives, which contain at least one radiation-crosslinkable component and are crosslinked by short-wave radiation, such as ultraviolet radiation or short-wave visible radiation, or by electron radiation, preferably by UV radiation.
- the coatings are substantially tack free after physical drying and have a smooth, substantially non-sticky surface. The absence of tack can be checked by the following test: Coated pieces of film of about 100 cm 2 are stacked and loaded with a weight of 10 kg and stored at 40 ° C. for 72 hours. If the film pieces can then easily be separated from one another without damaging the coatings, the coating must be considered tack-free. Under elevated pressure and elevated temperature (about 60 0 C to 160 0 C) coated with the adhesives substrates can be bonded to other substrates.
- Suitable radiation-curable adhesives are acrylated polyurethane dispersions, such as DW 7770 and DW 7773 (UCB, Surface Specialties), anionic and nonionic dispersions, such as NeoRad R-440 (NeoResins), Laromer 8983 (BASF), LUX 101 UV dispersion (Alberdingk), Halwedrol UV 95/92 W (Hütteness-Albertus) and Beyhydrol UV VP LS 2280 (Bayer), cationic radiation curing resins such as UCAR VERR-40 (The Dow Chemical Company ).
- Particularly preferred adhesives are radiation-curing compositions with photoinitiators.
- Suitable photoinitiators are, for. Irgacure 500 (Ciba) and Irgacure 819 DW (Ciba).
- a radiation-curable adhesive has the following composition:
- the formulations may optionally contain mixtures of the dispersions and further additives, such as additives (defoamers, leveling agents, anti-block additives, tackifiers, etc.).
- additives defoamers, leveling agents, anti-block additives, tackifiers, etc.
- powder coatings may be added in dispersed form, which on the one hand can provide a defined melting point or else can melt and participate in radiation curing.
- the radiation-curing compositions disclosed in DE 10 2004 035 979 A1 can be used not only as adhesives but also as embossing lacquer. They can therefore also be used advantageously in the present invention when embossing lacquer structures are required, for example for metallized holograms.
- "intarsia” motifs can also be produced in this variant, as described above, one does not use an adhesive which is cured by radiation, ie deactivated, but an adhesive which activates by radiation
- the functional layer regions of the second security element partial element are contacted, which contact non-irradiated regions of the adhesive layer, while the function of FIG Onstik Schemee of the second security element partial element, which come into contact with irradiated areas of the adhesive layer, adhere to the adhesive layer and can be glued firmly to it, optionally under elevated pressure and elevated temperature ent, which has a motif on one side of the adhesive layer and a photographic negative of this motif on the other side of the adhesive layer.
- the finished security element shows an "inlay" motif on both sides, ie the observer sees the motif of the first functional layer, wherein the recesses are exactly through the second functional layer be filled.
- the same effect is obtained for variants 1 and 3 described above, but the motif can only be seen from one side.
- the observer sees on one side of the security element the motif of the first security element subelement, and on the other side of the security element the corresponding negative.
- Embodiments of the security element according to the invention which are reflective layers as functional layers or one of the functional layers Layer can also be equipped very well with a so-called "polarization feature". These are security features that use polarization effects for authenticity assurance.
- Light-reflecting surfaces for example metallized holograms, are coated over the entire surface or in regions with a birefringent layer, a so-called "phase delay layer”.
- Phase retardation layers are capable of changing the polarization and phase of transmitted light. The reason is that the light is split into two mutually perpendicular polarization directions, which pass through the layer at different speeds, their phases are thus shifted from each other. The shift is, depending on the type and thickness of the layer, different sizes and has different effects.
- a ⁇ / 4 layer that is, a layer that delays the light in a direction one-quarter wavelength from the direction perpendicular thereto, can make circularly or elliptically polarized light from linearly polarized light and linearly polarize again from circularly polarized light.
- the phenomenon of polarization and polarizing materials are known.
- a security element that uses polarization effects for authenticity assurance is described, for example, in DE 10 2006 021 429 A1. When viewed under ambient light, the phase delay layer regions of such a security element are barely perceptible, but when viewed under polarized light, the phase delay layer regions become discernible.
- Suitable reflective layers are layers of vapor-deposited metallizations, layers of metallic effect paints, layers with interference pigments or thin-film element layers. High-index layers of, for example, TiO 2 or SiCb are also suitable as reflection layers.
- metallic functional layers for example metallized diffraction structures or matt structures
- the polarization feature may, for example, be embodied as a ⁇ / 4-layer, applied in motif form, over the entire surface or in regions, with only one orientation or with two or more different orientations.
- both reflective functional layers can be provided with the same or different polarization features. Transparent areas (recesses) are not disturbing. If the reflective layers are located on the same side of the carrier substrate, the carrier substrate should be isotropic or at least not exhibit excessive dispersion in the optical region.
- the method according to the invention in which the motif of a functional layer is used as an irradiation mask in order to transfer the motif into an adhesive layer, and from there into a further functional layer, can also be carried out in combination with an external irradiation mask.
- external radiation masks With external radiation masks, the same high precision can not be achieved as with the internal radiation mask, but if extreme precision can be dispensed with, the combination of inter- ner and external radiation mask interesting effects can be achieved.
- the adhesive layer can be irradiated not only by the first functional layer as radiation mask, but also by a further external radiation mask, wherein the external radiation mask is a motif has in the region of the recesses of the first functional layer. In this way, a combination of the motifs of the first functional layer and the external radiation mask is obtained in the second functional layer.
- the inventive method can also be carried out several times, d. H. More than two security element subelements can be combined with each other. Bonding more than two security element subelements can be useful, in particular, if a machine-detectable functional layer is to be hidden as a middle layer between two visually recognizable functional layer motifs.
- the functional layers which have to be separated in areas remaining on the adhesive layer on the one hand and in areas to be subtracted with the carrier substrate on the other hand may not have too high internal strength in the horizontal direction (in the direction of extension of the adhesive layer) in order to achieve a clean and sharp-edged separation to ensure.
- Functional layers whose internal strength is undesirably high are preferably applied in a screened manner.
- the edge of each raster point represents a predetermined breaking point, whereby the transfer to the adhesive layer in this case comprises a grid point as the smallest unit. If a functional layer is made up of several individual layers, it may be sufficient to implement only one of the individual layers as a stationary grid.
- the functional layers are shown as metal layers, in each case in combination with an embossing lacquer layer. It is to be expressly understood, however, that the present invention is by no means limited to such functional layers. Rather, any functional layers in any combination, for example, layers of printing inks, metallic effect colors, interference pigments, liquid crystal layers and combinations of layers, for example, color layers with layers of interference pigments are used.
- further layers as are customary in the field of security elements, may be contained in the security element constructions, for example protective layers or release layers in the case of transfer elements, adhesion-reducing layers for facilitating separation of the functional layer regions which are to remain on the adhesive layer, etc ..
- the additional layers must not interfere with the process flow, for example, may not shield the radiation used to irradiate the adhesive layer too strong.
- a material which is sufficiently permeable to the radiation used must be used as the carrier substrate of the first security element partial element.
- FIGS. 2 to 6 each show procedures in the production of a Safety element according to the invention, illustrated in sections through the security element of Fig. 1 along the line AA 1 in the cutout B, wherein
- FIG. 7a to 7c show a method sequence in the production of a security element 1 according to the invention, in which, instead of the second security element part element shown in FIG. 2c, the security element part element shown in FIG. 7a is used.
- FIG. 1 shows a section of a Vvert productivity 2 invention with a security element according to the invention 1.
- the security element 1 is also shown only as a section. It shows a sun on golden background, whereby the sun 3 is a transparent disk with fine transparent rays.
- the symbol 41 for the currency "EURO" can be recognized in the interior of the transparent solar disc, silver-colored.
- the gold-colored and silver-colored areas are each designed as a diffraction structure. Based on the following figures, it will be exemplified how such a security element according to the invention can be obtained. Shown are each sections through the security element, or its sub-elements, along the line AA 1 in the section B.
- FIG. 2 a shows a first security element partial element 10, comprising a first carrier substrate 11, a PET film permeable to UV radiation, an embossing lacquer layer 15 applied thereto with embossed diffraction structure 15 'with a gold-colored metallization.
- the metallization forms a first functional layer 12 with golden first functional areas 13 and first recesses 14 therein.
- the diffraction structure 15 'of the embossing lacquer layer 15 can also be seen in the first functional regions 13 as a diffraction structure 13'.
- an adhesive layer 30 is applied.
- FIG. 2 b shows the same illustration as FIG. 2 a, wherein the arrows indicate that the security element subelement 10 is irradiated with UV radiation.
- the adhesive layer 30 are separated by dashed lines, through the first functional areas 13 shielded and therefore not significantly changed in their adhesive force adhesive regions 33 and irradiated and thus deactivated adhesive regions 34 indicated.
- the line 40 under the first carrier substrate 11 indicates an external radiation mask, the meaning of which will be explained later.
- the second security element subelement 20 consists of the second carrier substrate 21, the second functional layer 22 and an embossing lacquer layer 25 therebetween.
- embossing lacquer layer 25 is a diffraction structure 25 'a shaped, which is reproduced in the second functional layer 22 as a diffraction structure 22 '.
- the second functional layer 22 is a silver-colored metallization.
- the embossing lacquer 25 was washed off with an aqueous surfactant solution before the application of the metallization 22, with the result that the metallization 22 badly adheres to the embossing lacquer.
- Embodiments with different metallizations are particularly preferred.
- FIG. 2 d shows how the irradiated first security element partial element 10 from FIG. 2 b and the second security element partial element 20 from FIG. 2 c are assembled to form a composite 5.
- the two sub-elements are slightly compressed, whereby the diffraction structure 22 'of the second functional layer in the non-hardened regions 33 of the adhesive layer 30 is transferred to the adhesive layer.
- the first security element sub-element and the second security element sub-element are glued together. No adhesion takes place in the irradiated, and thus deactivated, regions 34 of the adhesive layer.
- the adhesive is hard and inert, so that the diffraction structure 22 'in the regions 34 does not transfer to the adhesive layer, which is indicated by the smooth surface in the regions 34.
- the second carrier substrate 21 and the embossing lacquer layer 25 are peeled off, for example by a separating winding.
- the result is shown in Fig. 2e.
- the regions of the second functional layer 22 lying over the adhesive regions 34 were removed together with the second carrier substrate and the embossing lacquer layer, while the regions of the second functional layer 22 bonded to the adhesive regions 33 were pulled off the embossing lacquer layer.
- the glued areas now form second functional areas 23 with second recesses 24 in between.
- the first recesses 14 and the second recesses 24 are exactly congruent and together form an opening 3 passing through both functional layers.
- the first functional regions 13 and the second functional regions 23 are also exactly congruent.
- a hot stamping foil can be used as a second security element sub-element.
- the second carrier substrate 21 would be stripped off during the separation winding, while the embossing lacquer layer 25 remains on the formed security element 1.
- It can also serve as a protective layer.
- a protective layer (not shown in the figure) over the second functional areas or the second functional layer is expedient.
- the method described can also be repeated.
- a further adhesive layer can be applied and irradiated through the functional layers.
- another security element subelement (as shown in FIG. 2c) can be combined.
- Fig. 2b is indicated by the reference numeral 40, an external exposure mask.
- the use of external masks is required when one of the functional layers is to contain functional areas at locations where the other functional layer has recesses. If the recesses are correspondingly large, there are no problems with regard to the achievable precision.
- the two recesses 14 in the first functional layer 12 respectively correspond to beams of the solar motif shown in FIG. The rays are very fine and therefore rather unsuitable for use with an additional external exposure mask. If one imagines that one of the recesses corresponds to the solar disk, then there would be a relatively large recess in terms of area, into which a further representation can be integrated, for example the EURO symbol 41 shown in FIG. 1.
- the first security element partial element 10 is irradiated with the gold-colored first functional layer 12, as shown in Fig. 2b, but in the region of that recess 14, which corresponds to the sun disc, directly under the support substrate 11, an exposure mask such as the exposure mask 40 is mounted in the form of the EURO symbol, so hardens the adhesive layer in a corresponding area is not enough.
- the silver-colored second functional layer 22 also adheres in these areas.
- a second functional region 41 integrated into the solar disk is excluded. formed, in the case described the EURO symbol, which seems to float within the transparent solar disk.
- both functional layers become visible from one viewing side at the same time.
- FIG. 1 a transparent sun in a gold-colored hologram, in the interior of which a silver-colored hologram in the form of the EURO symbol hovers, is seen in plan view of the first functional layer.
- Figures 3a to 3e show the same security elements sub-elements 10 and 20 as the figures 2a to 2e.
- Like reference numerals designate like elements.
- the adhesive layer 30 is applied to the first carrier substrate so that during irradiation with the first functional layer 12 as radiation mask (FIG. 3 b), the irradiation mask is not directly adjacent to the adhesive layer to be irradiated , With the arrangement shown in FIG. 2, therefore, a more precise imaging and thus also a more precise reproduction of very fine structures can generally take place.
- both functional layers 12 and 22 are arranged on the same side of the carrier substrate 11, while they are at the variant shown in Fig. 3 are on different sides of the carrier substrate.
- the adhesive layer 30 is applied to the second security element subelement 20.
- the illustrations correspond to the Figures 4a to 4e and 5a to 5e the representations of Figures 2a to 2e and 3a to 3e.
- Like reference numerals designate like elements.
- the adhesive layer 30 is applied to the second functional layer 22 of the second security element partial element.
- the two security element partial elements must be joined together before the irradiation to form the composite 5. This is possible with different orientation of the first security element subelement, as shown in Fig. 4c and Fig. 5c.
- the first functional layer 12 is adhesively bonded, and in the variant according to FIG. 5c the first carrier substrate 11 is glued.
- an adhesive In order to avoid a full-surface bonding, an adhesive must be used which does not cause sticking when the two safety element sub-elements, as required for the irradiation, contact each other.
- the above tack-free adhesives satisfy this condition. So that the partial elements do not shift against each other during the irradiation, they can be provisionally fixed by means of a weak laminating adhesive.
- the two security element sub-elements 10 and 20 are then glued together by means of the non-irradiated adhesive regions 33 under increased pressure and elevated temperature.
- the diffraction structure 13 'of the first functional regions 13 is transferred into the adhesive layer, as shown in FIG. 4d.
- the adhesive thus acts like an embossing lacquer layer.
- Figures 2 to 5 describe the present invention by the use of a radiation deactivatable (curing) adhesive.
- a radiation-activatable adhesive can also be used.
- the regions 34 of the adhesive layer 30 would stick to the second functional layer 22, but the regions 33 would not.
- FIGS. 6a to 6e show the variant of the present invention, in which a thermoplastic resist is used as an adhesive.
- Like reference numerals again designate like elements as in the previous figures.
- FIG. 6a shows a first security element partial element 10 with the first carrier substrate 11, embossing lacquer layer 15 with embossed diffraction structure 15 ', a metallization applied thereon as the first functional layer 12 and a resist lacquer layer 35 in the form of the desired motif.
- Fig. 6a shows aiso the state of the first security element partial element 10 in which the photoresist 35 has already been irradiated and developed. Specifically, as shown in FIG. 6f, the photoresist 35 is irradiated through a mask, the mask being patterned to irradiate only those portions of the photoresist 35 in which recesses 14 are to be formed. In the embodiment shown, therefore, a positive photoresist is used.
- a negative photoresist would require irradiation in the areas where the resist areas are to be formed. After the irradiation, the photoresist is developed with a suitable developer, whereby the security element subelement 10 shown in Fig. 6a is obtained.
- FIG. 6c shows a second security element subelement 20 that is identical to the security element subelement shown in FIG. 2c.
- the two elements shown in FIGS. 6b and 6c are assembled into a composite 5, as shown in FIG. 6b.
- the layer sequence is the same as in the composite 5 shown in FIG. 2 d.
- the pressure-sensitive, in particular thermoplastic resist lacquer is activated by increased pressure and elevated temperature and now bonds with the latter in the regions in which it is in contact with the second functional layer 22 functional layer. At the same time, the diffraction structure is transferred into the adhesive.
- the security element 1 shown in FIG. 6e is obtained, which appears to be identical to the security element 1 shown in FIG. 2e.
- there are still adhesives in the recesses which can optionally be used for additional effects (for example, can be colored), whereas in the security element shown in FIG. 6e no adhesive is present in the recesses.
- security element subelements with adhesive, in particular thermoplastic, resist adhesive such as that shown in FIG. 6b, can be combined with security elements which already have a plurality of functional layers, such as the security element 1 shown in FIG. 2e ,
- the method according to the invention allows a register-accurate and edge-sharp formation of very fine structures with a width or a diameter of about 50 ⁇ m or less.
- a second security element subelement in which the motif of the functional layer is a metallized hologram or another metallized diffraction structure, a second security element subelement can alternatively be used, which has a carrier substrate with a layer formed thereon, which is used to form a metallized hologram or another metallized diffraction structure is suitable, has.
- an embossed metal donation foil 20 shown in FIG. 7a can be used without embossing, which has a carrier substrate 21 with a metallization 220 formed thereon.
- the metallization 220 of the metal donut foil 20 is glued to the adhesive layer 30 analogously to the method according to the invention shown in FIG.
- the metallization 220 is formed into regions 23 as shown in FIG. 7b.
- the regions 23 shown in FIG. 7b are suitable regions for forming diffraction structures.
- embossing is performed under pressure and temperature to form the regions 23 into metallized diffraction structures.
- the embossing tool can be, for example, an embossing cylinder, a normal embossed foil or a metallised embossed foil.
- the use of a metal donut foil without embossing as the second security element subelement allows optimum freedom in setting the metal adhesion and perfect uniformity, so that a metallization transfer succeeds even at low temperatures.
- the security elements according to the invention can be provided in the form of transfer materials, ie films or tapes having a multiplicity of finished security elements prepared for the transfer.
- the layer structure of the later security element is prepared on a carrier material in the reverse order in which the layer structure is later to be stored on a valuable object, the layer structure of the security element being in continuous form or already in the final outline form used as security element can be prepared on the substrate.
- the transfer of the security element onto the valuable item to be secured takes place with the aid of an adhesive layer, which is typically provided on the transfer material, but can also be provided on the valuable item.
- an adhesive layer can be provided for transfer either only in the areas of the security element to be transferred, or the adhesive is activated only in the areas to be transferred.
- the carrier material of the transfer elements is usually deducted from the layer structure of the security elements during or after their transfer to the valuable article.
- a separating layer release layer
- the carrier material can also remain on the transmitted security element.
- the security elements according to the invention can be used to authenticate goods of any kind.
- they are used to authenticate value documents, for example banknotes, checks or identity cards. They can be arranged on a surface of the value document or completely or partially in the value document will be embedded. With particular advantage they are used in value documents hole hole hole.
- the advantages of the security elements according to the invention with transparent carrier substrates and motifs to be considered from both sides of the value document can be particularly beautifully emphasized. Even negatives with the finest structures can be clearly recognized in transmitted light. You are in the achievable according to the invention precision of a counterfeiter practically imitated.
- a detachment of the security elements to transfer them to another valuable item, is practically not possible, because the security elements according to the invention always contain at least two adhesive layers, or they contain an adhesive layer and are connected with a further adhesive layer with the valuable object to be secured. If, for the bonding of the security element to the object of value, an adhesive is used which, in terms of its chemical and physical properties, is similar to the adhesive in the layer structure of the security element, the layer structure of the security element is always destroyed during detachment attempts.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Credit Cards Or The Like (AREA)
- Printing Methods (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008036481A DE102008036481A1 (en) | 2008-08-05 | 2008-08-05 | Method for producing security elements with matched motifs |
PCT/EP2009/005640 WO2010015381A2 (en) | 2008-08-05 | 2009-08-04 | Method for the production of security elements having mutually registered designs |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2340175A2 true EP2340175A2 (en) | 2011-07-06 |
EP2340175B1 EP2340175B1 (en) | 2012-10-10 |
Family
ID=41258916
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09777643A Active EP2340175B1 (en) | 2008-08-05 | 2009-08-04 | Method for the production of security elements having mutually registered designs |
Country Status (6)
Country | Link |
---|---|
US (1) | US9238383B2 (en) |
EP (1) | EP2340175B1 (en) |
CN (1) | CN102177033B (en) |
DE (1) | DE102008036481A1 (en) |
RU (1) | RU2496653C9 (en) |
WO (1) | WO2010015381A2 (en) |
Cited By (1)
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DE102017011917A1 (en) | 2017-12-21 | 2019-06-27 | Giesecke+Devrient Currency Technology Gmbh | Method for producing a multilayer film security element |
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GB201003136D0 (en) * | 2010-02-24 | 2010-04-14 | Rue De Int Ltd | Optically variable security device comprising a coloured cast cured hologram |
DE102010019766A1 (en) | 2010-05-07 | 2011-11-10 | Giesecke & Devrient Gmbh | Method for producing a microstructure on a support |
TWI436107B (en) * | 2010-06-25 | 2014-05-01 | Prime View Int Co Ltd | A transfer print structure and manufacture method thereof |
AT510366B1 (en) * | 2010-08-27 | 2012-12-15 | Hueck Folien Gmbh | VALUE DOCUMENT WITH AT LEAST PARTIALLY EMBEDDED SAFETY ELEMENT |
ITUD20110042A1 (en) * | 2011-03-22 | 2012-09-23 | Genefinity S R L | METHOD FOR THE REALIZATION OF A DECORATIVE ELEMENT APPLICABLE ON SURFACES AND ITS DECORATIVE ELEMENT |
DE102011114750A1 (en) * | 2011-09-29 | 2013-04-04 | Giesecke & Devrient Gmbh | Process for producing a microstructure support |
EP2579217A1 (en) * | 2011-10-04 | 2013-04-10 | Deutsche Post AG | Method and device for marking value labels |
ITRM20130007A1 (en) * | 2013-01-07 | 2014-07-08 | Zecca Dello Ist Poligrafico | METHOD OF REALIZATION OF DIFFRACTIVE METALLIC MICROELEMENTS VARIABLE IN A LAMINABLE PLASTIC BODY. |
DE102013106827A1 (en) | 2013-06-28 | 2014-12-31 | Leonhard Kurz Stiftung & Co. Kg | Method for producing a multilayer body and multilayer body |
DE102013113283A1 (en) | 2013-11-29 | 2015-06-03 | Leonhard Kurz Stiftung & Co. Kg | Multilayer body and method for its production |
GB201400910D0 (en) * | 2014-01-20 | 2014-03-05 | Rue De Int Ltd | Security elements and methods of their manufacture |
DE102014001842A1 (en) * | 2014-02-11 | 2015-08-13 | Giesecke & Devrient Gmbh | Method for producing a security element with negative writing and security element available therefrom |
DE102014106340B4 (en) * | 2014-05-07 | 2021-05-12 | Ovd Kinegram Ag | Multi-layer body and process for its production and security document |
US9527340B2 (en) | 2014-08-29 | 2016-12-27 | Illinois Tool Works Inc. | Composite laminate assembly and method of manufacturing the same |
DE102015015991A1 (en) | 2015-12-10 | 2017-06-14 | Giesecke & Devrient Gmbh | Security element with lenticular image |
EP3467551B1 (en) * | 2016-06-02 | 2021-05-26 | Toppan Printing Co., Ltd. | Method for manufacturing display body |
DE102016012111A1 (en) | 2016-10-10 | 2018-04-12 | Giesecke+Devrient Currency Technology Gmbh | A method of creating a motif security element on a target substrate |
WO2018141388A1 (en) * | 2017-02-02 | 2018-08-09 | Fedrigoni S.P.A. | Double metal security element having transparent pattern |
DE102018103236A1 (en) * | 2018-02-14 | 2019-08-14 | Leonhard Kurz Stiftung & Co. Kg | Security element and method for producing a security element |
DE102018002306A1 (en) * | 2018-03-21 | 2019-09-26 | Giesecke+Devrient Currency Technology Gmbh | A method of manufacturing a security element transfer material and security element transfer material |
GB2576218B (en) * | 2018-08-10 | 2021-09-15 | De La Rue Int Ltd | Security devices and methods of authentication thereof |
DE102020005268A1 (en) * | 2020-08-27 | 2022-03-03 | Giesecke+Devrient Currency Technology Gmbh | Optically variable security element |
CN112634743B (en) * | 2020-12-31 | 2022-06-17 | 季华实验室 | Optical anti-counterfeiting structure and manufacturing method thereof |
DE102022002839A1 (en) | 2022-08-04 | 2024-02-15 | Giesecke+Devrient Currency Technology Gmbh | Security element for a document of value with an optically variable primary surface pattern and hidden secondary surface pattern and method for its production |
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DE102006021429A1 (en) | 2006-05-05 | 2007-11-08 | Giesecke & Devrient Gmbh | Testing unit for checking authencity of test object, has circular polarizer and light partially reflects predetermined circular polarizer which is provided in partial area with light scattering diffuser |
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DE102007055112A1 (en) | 2007-01-05 | 2008-07-10 | Giesecke & Devrient Gmbh | Producing safety foil for valuable document e.g. check, comprises printing a side of substrate with a printing ink in the form of characters to be produced, applying a coating on the printed side and removing the printing ink |
JP4875003B2 (en) * | 2008-01-22 | 2012-02-15 | 日本発條株式会社 | Identification medium and manufacturing method thereof |
DE102008013073B4 (en) * | 2008-03-06 | 2011-02-03 | Leonhard Kurz Stiftung & Co. Kg | Process for producing a film element and film element |
DE102008052067A1 (en) * | 2008-10-17 | 2010-04-22 | Ovd Kinegram Ag | Volume hologram with expansion layer or contraction agent layer |
-
2008
- 2008-08-05 DE DE102008036481A patent/DE102008036481A1/en not_active Withdrawn
-
2009
- 2009-08-04 US US13/055,508 patent/US9238383B2/en not_active Expired - Fee Related
- 2009-08-04 CN CN2009801367142A patent/CN102177033B/en active Active
- 2009-08-04 EP EP09777643A patent/EP2340175B1/en active Active
- 2009-08-04 RU RU2011108210/12A patent/RU2496653C9/en not_active IP Right Cessation
- 2009-08-04 WO PCT/EP2009/005640 patent/WO2010015381A2/en active Application Filing
Non-Patent Citations (1)
Title |
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See references of WO2010015381A2 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102017011917A1 (en) | 2017-12-21 | 2019-06-27 | Giesecke+Devrient Currency Technology Gmbh | Method for producing a multilayer film security element |
Also Published As
Publication number | Publication date |
---|---|
RU2496653C9 (en) | 2014-05-10 |
RU2496653C2 (en) | 2013-10-27 |
WO2010015381A3 (en) | 2010-04-08 |
US20110127762A1 (en) | 2011-06-02 |
CN102177033B (en) | 2013-06-12 |
RU2011108210A (en) | 2012-10-27 |
WO2010015381A2 (en) | 2010-02-11 |
DE102008036481A1 (en) | 2010-02-11 |
EP2340175B1 (en) | 2012-10-10 |
US9238383B2 (en) | 2016-01-19 |
CN102177033A (en) | 2011-09-07 |
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