AT501320A1 - PASSIVE ACTIVE SAFETY FEATURE - Google Patents

Description

Passive activatable security feature

The invention relates to a passive Sicherheitsrnerkmal for application to documents of value, such as banknotes, identity documents and the like, which is activated only after the application.

Security documents, such as banknotes, identification papers and the like, are provided with security features that have different functional features in order to protect against counterfeiting and counterfeiting. Thus, for example, hologram strips or patches, security elements with conductive and / or magnetic properties, with optical properties (color shift effect, luminescence properties) and the like are applied to the value document.

These security elements are already active before application to the value document and can thus be applied by imitators as a valid security element on fake documents.

Furthermore, it is known to apply printing technology, for example, line grids on documents of value, which are provided with hidden information that can be read by means of lenses, filters or the like, but can not be copied.

The object of the invention was to provide a security element that is suitable only by register and register accurate application with high accuracy to the base material of the document of value for authentication and thus becomes a security feature.

The invention therefore relates to a security element for application to the base material of a value document, characterized in that the security element has layers and / or structures that are compatible with the layers and / or structures on the base material of a value document and by register and register accurate application on the 17/09 '03 MI 15:51 [SE / EM NR 9588] 17/09 2003 KI 15:34 FAX @ 005/022 ·· ···· ··

2

Base material of the value document is activated as a security feature, the hidden information is visually or mechanically recognizable. _

This creates a clear, unmistakable relation between the security element and the value document. The security feature is activated only by the register- and register-accurate application, only in combination of the layers and / or structures on the base material of the value document and the security element is the authenticity of the value document recognizable. Furthermore, thereby the requirements for the security measures during transport of the security features lower because the security feature alone is virtually worthless for imitators and counterfeiters.

The security element has layers and / or structures, for example line grids or fine structures.

These screens and / or structures may be in the form of characters, lines, guilloches, curves, waves, patterns, geometric figures and the like, optionally also in the form of a code.

The rasters and / or structures have optical properties (for example luminescences, reflective properties, optically active properties, diffraction structures, optically active filters and the like), and / or electrically conductive and / or magnetic properties.

Such structures can be made for example by printing, metallizing and demetallizing, by partial vapor deposition of the corresponding layer or structure onto a carrier substrate.

The security feature with the layers and / or structures and information present thereon is applied to the base material of the value document in register and registration. 17/09 '03 HI 15:51 [SE / EM NO 9588] ΒθΟβ / 022

17 / q9 2003 MI 15:35 FAX ····· ♦ · * · · ···························································································. ···

In this case, the partial layers, partial structures or partial information present on the security feature can form the desired complete information only by covering with the partial layers, partial structures or partial information present on the base material of the valuable document.

However, new effects can also be created by combination or superposition of the layers and / or structures or information present on the security feature and the base material of the value document.

Thus, for example, a corresponding security feature can also be applied to the base material of the value document, and thus activated, whereupon an additional identification feature is generated by subsequent overprinting of security feature and base material of the value document with further information. In this case, the overprinting of the security feature can take place over the entire area or partially, leaving certain areas which contain an identification feature or parts of an identification feature from the structures present on the security feature and the base material of the value document.

In addition to the layers and / or structures which are to become active security features in register and registration with respect to the base material of the value document, both the security element and the base material of the value document can have additional functional features or represent reference features for the activatable feature.

The security element, which is applied to the base material of the value document and / or embedded in the base material of the document, is produced by applying the desired screens, layers, structures or functional features to a carrier substrate. 17/09 '03 MI 15:51 [SE / EM NR 9588]

I X \ J 0007/022

17 / (19 2003 MI 15:35 FAX ·· # ··· · ··· «·· # * • · ····« ··· 9 I ··· · · # • · · · · · · # # »·« T · · ····· ·················

As support substrates are for example carrier films, preferably flexible transparent plastic films, for example, from PI, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PAEK, LCP, PEN. PBT, PET, PA, PC, COC, POM, ABS, PVC.

The carrier films preferably have a thickness of 5 to 700 μm, preferably 5 to 200 μm, particularly preferably 5 to 50 μm.

Furthermore, metal foils, for example Al, Cu, Sn, Ni, Fe or stainless steel foils having a thickness of 5 to 200 μm, preferably 10 to 80 μm, particularly preferably 20 to 50 μm, may serve as the carrier substrate. The films can also be surface-treated, coated or laminated, for example, with plastics or painted.

Furthermore, paper or composites with paper, for example composites with plastics having a weight per unit area of 20 to 500 g / m 2, preferably 40 to 200 g / m 2, can also be used as the carrier substrates. be used.

Furthermore, woven or nonwoven fabrics, such as continuous fiber webs, staple fiber webs and the like, which may possibly be needled and / or calendered, can be used as carrier substrates. Preferably such fabrics or webs of plastics, such as PP, PET, PA, PPS and the like, but it can also be woven or nonwovens made of natural, optionally treated fibers, such as viscose fibers are used. The webs or fabrics used have a basis weight of about 20 g / m2 to 500 g / m2. If necessary, the nonwovens or fabrics must be surface-treated.

The corresponding structures and information are then applied to this carrier substrate.

The application of these features may be accomplished in any known conventional manner, for example by spin coating, brushing, vapor deposition, by 17/09 '03 MI 15:51 [SE / GM NR 9588] 17/09 2003 BI 15:35 FAX @ 008 / 022 5 ··· ··· · · · · · · · · ·

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Printing (gravure, flexo, screen, offset, digital, and the like) by spraying, sputtering or roller coating techniques.

In this case, for example, a transfer lacquer layer may be present on the carrier substrate, as a result of which the applied features may be transferable.

Likewise, the corresponding features are applied to the base material of the value document at a certain defined location.

The base material of the value document can be made of cellulose-free, cellulose-containing paper, cotton paper, paper with thermochromic or chemically activatable coating, paper with watermarks, these papers also connected with plastics or metal foils, plastics, composites with plastics, metal foils or composites of metal foils with plastics and / or paper and the like. The thickness of the value document can be 6 -1000 pm.

The described features can be applied to the base material of the value document in any known printing process, for example by gravure printing, indirect gravure, gravure, intaglio printing, embossing, blind embossing, offset printing, flexographic printing, letterpress printing, digital printing, vapor deposition, sputtering, metallizing and possibly partial demetallization and the like are applied.

In one embodiment, the corresponding layers and / or structures can be applied both to the security element and to the base material of the value document in a defined area, wherein the security element in the form of a thread, strip. Melierfaser, planchettes, patches or other formats, for example, on a document of value covering the entire surface covering laminate film (full-surface or partial) may be present. 17/09 '03 MI 15:51 [SE / EM NR 9588]

Thus, electrically conductive and / or magnetic layers and / or structures can again be applied in defined areas on the security element and on the base material of the value document. By registering and registering the application of the layers and / or structures present on the security element to the layers and / or structures present on the base material of the document of value, either a corresponding machine recognizable or measurable property can be generated or by overlaying the two detectable measurable features Properties a defined size or intensity or coding are generated. Only then does the superimposition of the two elements, the layer and / or structure present on the base material of the value document and the layer and / or structure present on the security feature produce a closed magnetic or electrically conductive path, for example a resonant circuit by a combination of antenna and Capacitor, or electromagnetic interference or coding.

As electrically conductive layers, for example metallic or non-metallic or polymeric conductive layers can be used.

Suitable metallic conductive layers are, for example, paints or coatings with metal pigments (for example copper, aluminum, silver, gold, iron, chromium and the like), metal alloys such as copper-zinc or copper-aluminum.

Furthermore, it is also possible to use doped or non-doped semiconductors, such as, for example, silicon, germanium or ionic conductors, such as amorphous or crystalline metal oxides or metal sulfides, as an additive. Furthermore, polar or partially polar compounds such as surfactants or non-polar compounds such as silicone additives or hygroscopic or non-hygroscopic salts can be used or added to adjust the electrical properties of the layer. 17/09 '03 HI 15:51 [SE / EM NO 9588] 17/09 2003 MI 15:38 FAX Q010 / 022 17/09 2003 MI 15:38 FAX Q010 / 022 • · ···· 9 · e • # # ·· • ee • ··· e • # • ·· 7

The application of the can be done for example by known, PVD or CVD method, by sputtering, by known printing methods and the like and by known D Demetailisierungsverfahren for example using an etchant or preferably a soluble wash color.

This electroconductive metallic layer may be applied by known methods such as sputtering, sputtering, printing (gravure, flexographic, screen, digital printing and the like), spraying, electroplating and the like, and by known demetallization methods using, for example, an etchant or preferably be structured a soluble wash. The thickness of the functional layer is 0.001 to 50 μm, preferably 0.1 to 20 μm.

As a non-metallic conductive layer, for example, a carbon black, graphite, amorphous or crystalline ceramic pigment such as ITO, ATO, FTO and the like pigmented dispersion or solution in ethylene acrylate copolymer, nitrocellulose, PVB, PA, acrylate or PVC or their copolymers is used.

Optionally, known binders (for Intaglio or Offfsetfarben) can be added.

As electrically conductive polymeric layers, for example, polyacetylene. Poly-p-phenylene, polypyrroles, polythiophenes, poly-p-phenylenevinylene, low molecular weight macrocycles, organopolysilanes, polysulfur nitride and / or polyanilines and / or derivatives thereof can be used. Polyaniline or polythiophenes are preferably used as the electrically conductive polymers. Pdlyethylenedioxythiophene is particularly preferably used as the electrically conductive polymer

The polymers may be in the form of a dispersion or in the form of their monomers or prepolymers, with subsequent application of an initiator and / or MI / O

17/09 2003 MI 15:36 FAX ····

8th

Catalyst or already applied in mixture with an initiator and / or catalyst on a carrier substrate.

Baytron® P from H.C., for example, is commercially available as an electrically conductive polymer suspension. Strongly replaceable. Suitable dispersants are, for example, inert solvents, preferably aqueous solvents or alcohols, such as i-propanol. If desired, it is also possible to add matrix polymers, for example water-soluble polyesters, polyurethanes, polystyrene sulfonates, polyacrylates or ethylene acrylate copolymers, as matrix polymers to the polymer dispersions.

For example, polyethylenedioxythiophene can be used with polystyrene sulfonate as the matrix polymer.

However, the monomers or prepolymers are preferably applied to form the electrically conductive polymers and polymerized in situ.

Thus, if ethylenedxythiophene is used as monomer, for example Baytron® M or Baytron® M-V2 from H.C. Strong, and Feflll ^ oluolsulfonat, for example Baytron® C types, for example Baytron® CB-40 Fa Fa Bayer, used as an initiator and / or catalyst, is the polymer present on the carrier substrate after the polymerization Polyethylendbxy-thiophene / toluenesulfonate (PEDT-TS ). If higher layer thicknesses are acceptable, it is also possible to use polyethylenedioxythiophene / polystyrenesulfonate.

Depending on the use, the electrically conductive polymer layers may each have a thickness of 0.1-50 μm, preferably 0.5-10 μ / η. For certain applications, thinner layers of 0.001-50 μm, preferably 0.05-10 μm, are readily producible.

Furthermore, these polymeric layers are excellent in conductivity. The extensibility of the layer can be variably controlled depending on the polymerization process. 17/09 '03 UI 15:51 [SE / EH NR 9588]

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0012/022

The electrically conductive polymeric layers are generally temperature resistant, it may optionally temperature resistances of -40 6 to> 100 * C can be achieved.

If desired, the transparency of > 80% can be achieved.

The electrically erertfähigen polymers can also be pigmented, all known pigments are suitable. If the transparency is not to be significantly influenced, however, highly opaque or coloring pigments such as carbon black or graphite are not suitable

The proportion of pigments in the solid state can be up to 40%.

The magnetic properties of the respective layer on the security feature or the base material of the value document can be generated for example with known magnetic pigment colors. Particularly suitable for the production of layers with optionally variable magnetic properties are magnetic colors which are able to produce or conduct a magnetic field with high flux density. The measurable gradient of the magnetic flux is then generated, for example, by thickness modulation of the magnetic layers or by combination of different magnetic layers and substances.

Particularly suitable are magnetic pigment pigments with pigments based on Fe oxides, such as FejOa or Fe304, iron, nickel, cobalt and their alloys, barium or cobalt-ferrite, hard and soft magnetic iron and steel grades in aqueous or solvent-containing dispersions. Suitable solvents include, for example, i-propanol, ethyl acetate, methyl ethyl ketone, methoxypropanol and mixtures thereof.

Preferably, the pigments are in acrylate polymer dispersions having a molecular weight of 150,000 to 300,000 in acrylic-urethane dispersions, 17/09 '03 MI 15:51 [SE / EM NR 9588]

@ 013/022 17 / Q8 2003 MI 15:40 FAX > 10

Acrylate-styrene or PVC-containing dispersions or introduced in lösemittelhattigen such dispersions.

Particularly suitable are magnetic paints with pigments based on Cr / Ni steel. These magnetic colors, in contrast to the conventional magnetic colors, which appear black, brown or gray, have a silvery appearance and at the same time have the required magnetic properties described above.

This makes it possible to produce the desired or required for many applications shiny metallic appearance in one operation already by printing these magnetic colors. Overprinting or coating with metallic or metal layers to produce the desired appearance is therefore not necessary, but can be done easily, for example, to introduce additional identification features.

Analogously, new optically active layers or structures can also be produced by direct superimposition of the optically active layer or structure present on the security element, or the respective Tellsehlchten or substructures after application or embedding of the Add security elements in the value document to a new optically effective layer or structure.

Likewise, different features may initially be congruent on the security element or the base material of the security, so that one of the features is completely or partially covered. In the event of tampering, such as stretching, bleaching, etching and the like, the previously covered feature will either be uncovered generates a new feature from the two characteristics.

The optically active layers or structures can be prepared in any known manner. Preferably these will be 17/09 '03 MI 15:57 [SE / EM NR 9589] 0014/022. ·· ····

17/09 2003 Ml 15:40 FAX ·· ♦ · < However, eee e 11 diffraction-effective structures by coating the support substrate, which may already aulweist one or more of the described layers, with a radiation-curable lacquer, which is pre-cured to the gel point by excitation with radiation of a defined wavelength, and simultaneous molding of the surface structure, where the further hardening (main hardening) of the radiation-curable lacquer is carried out by exciting radiation of a wavelength different from the pre-hardening step, whereupon optionally a postcuring takes place.

On analogous catfish optical effects, such as color effects, color gradients or mixed colors can be generated by appropriate superimposition or supplement of each present on the security feature and on the base material of the value document colored or luminescent layers.

The optical properties of the respective layer are indicated by visible dyes or pigments, luminescent dyes or pigments which fluoresce or phosphoresce in the visible, in the UV range or in the IR range, by TiO 2, ZnS, kaolin, ATO, FTO, aluminum , Chromium and silicon oxides or, for example, organic pigments such as phthalocyanine blue, i-indolidingelb, dioxazine violet and the like, by effect pigments, such as liquid crystals, pearlescent, bronzes and / or multilayer color change pigments and / or heat-sensitive inks or pigments. These can be used in all possible combinations. In addition, these pigments can also be used alone or in combination with other dyes and / or pigments.

Furthermore, for example, the described features can be present in coded form on both layers, whereby the desired readable code is formed only by the joining together of the two layers. For example, encapsulated dye constituents may be present on the value document and on the security element, respectively. When joining the two elements, if necessary under pressure 17/09 '03 MI 15:57 [SE / EM NR 9589] 17/09 2003 KI 15:41 FAX ··· »# · Q015 / 022 12 ··

By reacting the two components of the colorant, the corresponding optical effects are produced, for example luminescences, such as fluorescences or phosphorescence or color effects or defined color gradations or mixed colors.

Thus, for example, white fluorescence can be generated by applying a red fluorescence to the base material of the value document, to the registration and registration the security feature, which has a blue fluorescence in the corresponding areas, and then register and register accurate overprinting with a green fluorescent color or a Paint. However, there is also the possibility of partial overprinting that is not precise in register, with a fluorescent moiree effect then being produced in the regions not overprinted in register. In a similar manner, luminescences can be produced with different persistence times.

Furthermore, layers with different proportions of long-wave and short-wave excitable colors may be present on the security feature and on the base material of the value document, with a characteristic effect occurring when excited in the entire wavelength range

In order to produce further counterfeit-proof identification features, an electromagnetic wave-reflecting layer and a transparent, for example polymeric, oxidic or sulfidic spacer layer can be applied to the base material of the value document. On the security feature can then be applied a layer of metallic clusters. By register-accurate combination of security feature and base material of the value document then appears according to the key / lock principle, a characteristic color effect.

It is also possible in each case in or on the surface of the two elements (security element and base material of the value document) to provide corresponding parts of DNA encodings, which after the joining of the two elements according to the key-lock principle a unique 17/09 '03 MI 15:57 [SE / EM NR 9589]

17/09 2003 UI 15:41 FAX ····· «► ·« > ···································································································································································· in the form of characteristic fluorescences.

Likewise, the security element can have a layer or structure which reacts when applied or embedded in the value document or when producing the base material of the value document with a layer or structure located on the base material and only then becomes recognizable.

The described features can be generated individually or combined.

Furthermore, the security elements can be provided with a protective lacquer layer on one or both sides. The protective lacquer may be pigmented or unpigmented, using as pigments all known pigments or dyes, for example ΠΟ2, ZnS, kaolin, ATO, FTO, aluminum, chromium and silicon oxides or, for example, organic pigments such as phthalocyanine blue, l-indolidine, Dloxazlnviolett and the like can be. Furthermore, luminescent dyes or pigments which fluoresce or phosphoresce in the visible, in the UV range or in the IR range, effect pigments, such as liquid crystals, pearlescent, bronzes and / or multilayer color change pigments and heat-sensitive colors or pigments can be added. These are replaceable in all possible combinations. In addition, phosphorescent pigments can also be used alone or in combination with other dyes and / or pigments.

The application or the complete or partial embedding of the security element on or in the base material of the value document can be carried out in register, depending on the desired effect

The register-accurate application 'is preferably carried out by means of a register-controlled method, wherein the present on the base material of the document of value register marks are measured over the area, the roll catches adjusted accordingly and the security feature 17/09 '03 MI 15:57 [SE / GM NR 9589] 17 / Q9 2003 MI 15:41 FAX 121017/022 17 / Q9 2003 MI 15:41 FAX 121017/022 I • • • e ··· • e 14 register-accurate application. The register marks are positioned very precisely, the application can be carried out by means of an application machine, or, for example, during the application of patches, by x / y-controlled application punches, or an embossing head.

The wide document can then be provided with a known coating to increase the circulation capability or a protective lacquer or a protective film.

Furthermore, the security element according to the invention in the edge region of value documents can optionally be applied in registration with the layer or structure present on the value document and at the same time be used as edge reinforcement, whereby both a forgery-proof security feature is generated and the circulation capability of the value document is increased. 17/09 '03 MI 15:57 [SE / EM NR 9589]

Claims (1)

17/09 2003 UI 15:41 FAX 15 • 9 »············································································································································································································································· Value document, characterized in that the security element has layers and / or structures which are compatible with the layers and / or structures on the base material of the value document and by application to the base material of the value document or by complete or partial embedding in the base material of the value document as Security feature is activated, the hidden information is visually or mechanically recognizable. 2) Security element according to claim 1, characterized in that the application or the embedding on or in the base material of the value document register and register accurate. 3) Security element according to one of claims 1 or 2, characterized in that the information by superimposing or supplementing the partial layers, partial structures or partial information on security element and the base material of the document of value is visually or mechanically recognizable. 4) A security element according to any one of claims 1 to 3, characterized in that defined by superimposing or supplementing the two layers and / or structures machine recognizable electrically conductive properties arise. 5) A security element according to any one of claims 1 to 4, characterized in that defined by superimposing or supplementing the two structures machine-recognizable magnetic properties arise. 17/09 '03 HI 15:57 [SE / EM NR 9589] @ 019/022. · · ··· · ·. 6) Security element according to one of claims 1 to 5, characterized in that by superimposing or supplementing the two structures defined visually or machine-recognizable optical properties or structures arise. 7) A security element according to any one of claims 1 to 6, characterized in that by overlaying or supplementing the two structures defined DNA-encoded properties or structures arise. 8) Security element according to one of claims 1 to 7, characterized in that a plurality of different functional feature features are present on the security element and the base material of the value document. 9) Security element according to one of claims 1 to 8, characterized in that is generated by overprinting of the security element and the base material of the value document after the application of the security feature on the base material of the value document, a first or an additional identification feature. 10) Security element according to one of claims 1 to 9, characterized in that it has a latent feature that is recognizable only by manipulation attempts. 11) Security element according to one of claims 1 - 10, characterized in that the security element is provided on one or both sides with a protective lacquer layer. 12) Safety elements according to claim 11, characterized in that the protective lacquer layer is pigmented. 17/09 '03 MI 15:57 [SE / EH NR 9589] 1 · 7/68 2003 MI 15:42 FAX 17 ···: ··· ···· • e • «®020 / 022» · ··· * 13) value document, characterized in that a security element according to one of claims 1 to 12 is applied to the basic material value document. 14) value document, characterized in that in the document of value at least one security feature according to any one of claims 1-12 is partially or completely embedded. 15) value document according to one of claims 13 or 14, characterized in that the Sicherheitsmerkmai applied at least in an edge region of the value document or at least partially embedded. 16) value document according to one of claims 13 to 15, characterized in that the security element and the base material is completely or partially overprinted after application of the security element on the base material of the value document to produce a first or additional identification mark with another layer or structure. 17) A method for producing Sicherheitsmeikmalen for application to or embedding in the base material of a value document, characterized in that applied to a security element structures that are compatible with the structures on the base material of the value document and activating application to the base material of the value document as a security feature becomes, whereby the hidden information becomes visually or mechanically recognizable. 18) A method for producing security features for application or embedding in the base material of a value document according to claim 17, characterized in that the application or embedding is carried out register and register accurate 17/09 '03 MI 15:57 [SE / EM NR 9589] 1 , 7/09 2003 MI 18:42 FAX * ·· ···· 18 ····················································································································································································································· A method for the application or embedding of security elements on or in a base material of a value document by a register-controlled method, wherein the existing on the base material of the value document register marks are measured over the area, the roll length adjusted accordingly and the security feature accurately by means of an application machine, an application stamp or an embossing stamp is applied or embedded. 20) Use of the security features according to claims 1 to 12 for application to or at least partial embedding in a document of value. 17/09 '03 MI 15:57 [SE / EM NR 9589]