RU2574969C2 - Security document with at least partially integrated protective element - Google Patents

Abstract

FIELD: printing.

SUBSTANCE: invention relates to a security document with at least partially integrated protective element, and this security document consists of a paper with protection against forgery with two or more layers of the same or various materials. The protective element is made in the form of a transfer element and is applied on the surface of one of the paper layers with protection against forgery, located inside, and this protective element is at least partially coated with at least one more layer of the multilayer paper with protection against forgery, and at least one of the paper layers with protection against forgery has at least one recess through which the protective element is observable.

EFFECT: increased protection.

29 cl, 5 dwg

Description

The invention relates in particular to a bilayer or multilayer security document, for example, a banknote, a security or an identity document with an integrated security element in the form of a transfer element.

Bilayer or multilayer security documents are mainly obtained from multilayer materials or composite materials that contain layers of various materials.

In particular, combinations of paper and polymers in the form of a multilayer material find diverse applications, since such multilayer materials increase the strength of paper, in particular, have improved tensile strength, resistance to pollution, and the like.

For example, EP 1599346 B discloses a multilayer material that can be used as counterfeit paper, which optionally has a multilayer polymer layer with an upper and lower side and at least one paper layer connected to the polymer layer on the upper side of the polymer layer . A paper layer may also be located on the underside of the polymer layer. In this case, at least one paper layer and / or in the polymer layer can be embedded protective protective sign in the form of an electrical, electronic, magnetic or optical source of information or a combination thereof. Examples of these marks are watermarks, printing, microperforation, iridescent paints, embedded fibers or the like.

At the same time, paper with anti-counterfeiting has the appearance and quality of the touch like paper, but much higher tensile strength and resistance than paper.

From WO 2004/028825 A there is known a paper with anti-counterfeiting for obtaining security documents such as banknotes and the like, which consists of a creaseable multilayer substrate comprising at least one paper layer and at least one film.

Protective elements can be applied to the paper layer, for example, in the form of prints, as well as in the form of optically variable elements. Then, the paper surface is provided on one or both sides with a polymer film to increase resistance to pollution. Further, it is possible to embed the security thread at least partially in the paper layer or place it between the paper layer and the polymer film.

From WO 2005/038135 A a multilayer paper with counterfeit protection is known, which consists of at least two paper layers, one of the paper layers having at least one security element.

The incorporation of security elements, such as, for example, security threads into counterfeit laminated paper has proved difficult. Counterfeit multilayer paper consists of two or more layers, most often of different materials with different properties, for example, layers of paper and polymer. Separate layers in comparison with the thickness of single-layer paper with anti-counterfeiting paper, respectively, have a much smaller thickness.

Numerous security features may be imparted to security elements, such as, for example, security threads, such as, for example, a color changing effect, a fluorescence effect, conductive properties, magnetic properties, magnetic coding, etc.

These security features can be combined in almost any combination, but as a result of this, the thickness of the security element generally increases.

According to the prior art, security filaments are understood to mean a structure that contains at least one film-like carrier substrate (for example a polymer film) onto which security features are applied or incorporated, and these security features are optionally protected by another similar film-like substrate. Such security threads have long been used around the world in traditional papers with counterfeit protection and in a large number of currencies. Due to the thickness of the film-like substrates, which should provide sufficient stability in the manufacturing and processing processes, as well as sufficient resistance to the handling of security documents, the thickness of such security threads is usually from 23 to 45 microns.

It is known from WO 2006/086431 A that in a multilayer printed security sheet consisting of two thin layers of anti-counterfeit paper and an inside polymer layer, security threads can be introduced that are located between the anti-counterfeit paper layers and inside polymer layer. In this case, the thickness of the security threads at least partially contributes to the overall thickness of the printed substrate.

Security threads, as a rule, are provided with an adhesive layer on both sides of the surface, which should provide a fixed fixation in security documents. This usually refers to hot-melt adhesive, which is activated by paper production. With a short duration of heat exposure, often there is not enough time for heat exposure so that the security threads are activated so that good adhesion is achieved. This, in particular, refers to the side of the security thread that is in contact with the paper layer.

Generally, counterfeit single-layer paper has a weight per unit area of 80-110 g / m ² and a thickness of about 80 to 130 microns. A separate paper layer of anti-counterfeit multilayer paper typically has a weight per unit area of 35 g / m ² and a thickness of about 35 to 50 microns, a thickness of the inside of the polymer layer is usually 30 to 40 microns with a weight per unit area, from 30 to 40 g / m ² . For anti-counterfeit multilayer paper with the inside of the paper layer and the outside of the polymer layers, the weight per unit area of the paper layer is usually from 80 to 100 g / m ² and the thickness of the polymer layers is usually from 4 to 12 μm. The security threads, as already mentioned, are generally about 23 to 45 microns thick, and therefore difficult to fix in thin layers of paper with anti-counterfeiting. The security threads have only a slight adhesion in these layers and may even protrude from these layers outward, since the paper fibers cannot completely cover the security threads.

If, however, they try to embed the security threads in the paper, while both the paper layers and the security threads have a similar thickness, and then wrap the paper webs in large rolls, then the local difference in thickness in the place of the built-in security threads increases turnover. In professional terminology, this effect is often called a “ring screed.” In extreme cases, even partial stretching, blocking (due to local higher pressure), or rupture can occur. The application of thick security threads is even more significant when several sheets are folded onto each other. Due to the threads lying on each other, the stack of sheets becomes wavy, which can greatly complicate further processing. Recycling is usually prevented by the fact that the security threads, when introduced into the paper with anti-counterfeiting paper, change their position, so that they do not lie exactly on top of each other in the stack, but are distributed in a wide area, for example, an area 6 mm wide.

A significant disadvantage of this method is that it is not possible to integrate security threads into the overall design of security documents. This interferes, in particular, when the position of the security threads must be in a certain relationship with transparent windows or also with single-sided openings in a multilayer security document. For example, it may be desirable to pass a security thread through a transparent window of a multilayer security document, with the security thread in each individual security document passing exactly through the middle of the transparent window. If the position of the security threads varies for a more comfortable position in the stack, then such integration into the design is not possible.

If anti-counterfeit paper has slits in the layers or perforations, i.e. the so-called windows, the security threads in these areas have less adhesion to the substrate, the security threads in these areas can move away from the substrate, if adhesion to one layer is poor. This impairs the ability to fold security documents in a wet and dry state, and thus also in handling stability. Falsification is facilitated at the same time.

Therefore, the object of the present invention is to provide a security document consisting of two- or multi-layer paper with counterfeit protection with at least partially built-in security element and a method for its manufacture, which achieves excellent fixing in the substrate and prevents the disadvantages of the prior art.

Therefore, an object of the present invention is a security document with at least partially integrated security element, wherein the security document consists of counterfeit paper with two or more layers of the same or different materials, characterized in that the security element is a transfer element, and this the element is applied to the inside surface of the anti-counterfeit paper layer, and this element is coated with at least one further layer of anti-counterfeit multilayer paper of at least her least in part.

The next object of the present invention is, respectively, a security element that can combine several security decals, but much thinner than traditional security threads with the same functionality.

Further, the object of the present invention is accordingly to provide a method in which the fixing of the security element on or in the paper layer is separated from the process of obtaining multilayer paper with anti-counterfeiting.

Therefore, a further object of the present invention is a method for producing counterfeit paper for a security document with an at least partially integrated transfer element, characterized in that the transfer element is first placed on a substrate and applied to the inner surface of the paper layer with protection against counterfeits by separating the substrate and fixing with an adhesive coating, and then during one or more subsequent stages, one or more of the following layers are connected to the first layer.

According to the method according to the invention, the protective element in the form of a transfer element in the first stage is applied to one of the layers during the transfer. The transfer element in this method enters deposited on a substrate, the transfer element is brought into contact with the paper layer during transfer and, using pressure and / or elevated temperature, is transferred or applied onto the paper layer. By this we mean that the transfer element is fixed on the surface of the paper with an integral connection. The substrate in this process is separated so that only the transfer element remains on the paper layer. In a second step, a paper layer with a transfer element applied is connected to the following layers.

Such transfer elements may be in the form of strips, tapes or sheets. They can be continuous or separate or have a continuous or separate design. They can be distinguishable or indistinguishable with the naked eye, distinguishable by auxiliary means, and can also be read by a machine.

Using the method according to the invention, it is possible to very well integrate into the design, in which the transfer element, for example, passes exactly through the window, since the thickness of the transfer element is much less than the thickness of the security threads with the same functionality according to the prior art, and therefore the position of the protective element does not occur.

A further advantage of the security document of the invention is its high resistance to counterfeiting. While security threads, which are known to consist of at least one similar substrate film on which the functional layer is located, are fully embedded in the security document, and they can be because of their thickness and strength like a substrate film with due skill pull out of the security document, then with the transfer element according to the invention this is impossible or very difficult, since there is no longer a sufficiently thick, strong, similar to the substrate film and transfer element, consisting only from one functional layer can no longer, without destroying, pull out from a protected document.

An anti-counterfeit document may, for example, consist of a three-layer paper / polymer / paper, paper / paper / polymer composite material, or a two-layer polymer / paper or paper / paper composite material.

In this case, the individual layers consist of paper, cotton paper, paper containing synthetic, natural fibers or recycled fibers, synthetic paper, polymers, such as, for example, disclosed in EP 1599346 A, natural polymers, such as, for example, PLA, modified starches, as well as mixtures of these materials, for example cotton paper or cellulose, enriched with synthetic fibers to increase handling stability or resistance to pollution. Further, the paper layers may contain components known to those skilled in the art, such as fillers, agents for moisture resistance, adhesives for bonding surfaces and in bulk. Further, the paper layers may contain known additives to enhance microbiological or antiviral resistance (silver ions, etc.), as well as various types of protective decals (pigments, dyes, fibers, etc.).

The thickness of the paper layers is calculated mainly on the basis of the desired total thickness and the number of paper layers in the composite material. If it is, for example, a three-layer combined paper-polymer-paper material with a total thickness of 100 μm, then the thickness of an individual paper layer is in the range from 10 to 50 μm, preferably in the range from 20 to 40 μm.

A protective element in the form of a transfer element is applied to the inside surface of one of the layers of bilayer or multilayer paper with counterfeit protection.

The transfer element may be in the form of a thread, tape or sheets. By a transfer element in the form of a thread is meant a transfer element, the length of which is much greater than the width. Typically, such a transfer element extends over the entire length or width of the security document, that is, several centimeters, and has a width of 0.5-6 mm. Tapes usually have a large width, approximately in the range of 6-30 mm. The edges of the thread or tape are usually straight and parallel to each other, however, they can be cut along the contour and take the form of curving lines or, accordingly, have wavy edges, extensions or narrowings in certain places, and the edges may not be parallel to each other.

If necessary, several transfer elements can also be on the security document at the same time, as a result of which the resistance to counterfeiting is further enhanced.

If we consider, for example, a three-layer composite material consisting of paper / polymer / paper layers, then the transfer element is preferably applied to the inner surface of the paper layer.

If the transfer element is made in the form of a thread, and the paper layers are continuous on both sides, then this transfer element in the finished security documents is practically no different from traditional security threads. But if one paper layer has slots, it is possible to simulate the so-called windows with threads, which are located periodically in certain places on the surface of the paper, using the transfer element visible on one side.

In this case, the transfer element consists of one or more functional layers, and in this case, the transfer element enters the transfer process deposited on the substrate. The boundary surface between the functional layers of the transfer element and the substrate is made so that it is possible to separate the substrate from the transfer element (Release) during the transfer. In the case of traditional security threads, this does not happen, since it is especially desirable for them to have the best possible and strongest connection between the film-like substrate and the functional layers to provide resistance to mechanical, physical and chemical influences. An adhesive coating is applied to the surface of the transfer element, which is facing away from the substrate, which during the transfer process is activated by pressure and / or elevated temperature and / or radiation and provides an adhesive connection between the transfer element and the corresponding layer of multilayer paper with counterfeit protection. There is no adhesive coating on the side of the transfer element facing the substrate or, respectively, on the side of the substrate facing the transfer element. When applied, the substrate is separated, so that only layers of the transfer element remain on the anti-counterfeit paper layer.

The transfer element due to the lack of a substrate and as a result of this small thickness does not form a self-supporting layer. Rather, the anti-counterfeit paper layer onto which the transfer element is applied takes on a load-bearing function after application. Conventional security threads always have at least one film-like backing which, before, during, and after being inserted into the security paper, provides security for the security element. This entails that properties such as elasticity, tensile strength and puncture strength of the transfer element according to the invention are worse than those of the transfer elements known in the art.

The thickness of the transfer element depends on the number and properties of the functional layers and is in the range from 3 to 25 microns, preferably in the range from 3 to 18 microns, in particular preferably in the range from 6 to 18 microns.

As substrates, carrier films, preferably flexible polymer films, for example from PI, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, are taken into account , POM, ABS, PVC, PTFE, ETFE (ethylenetetrafluoroethylene), PFA (fluoropolymer tetrafluoroethylene - perfluoropropyl vinyl ether), MFA (fluoropolymer tetrafluoromethylene - perfluoropropyl vinyl ether), PTFE (polytetrafluoroethylene), PVF (polydivide) EFEP (Ethylene Tetrafluoroethylene - Hexafluoropropylene Fluoropolymer).

The substrate preferably has a thickness of from 5 to 100 μm, preferably from 5 to 36 μm.

The first layer of varnish is applied to the substrate, which promotes separation, which means that its adhesion to the substrate is less than the adhesion of the remaining layers of the transfer element to each other. If the substrate is properly selected relative to its surface and varnish layer, it is possible to obtain a separation-promoting varnish layer without additional measures.

In this case, for example, a thin layer based on copolymers of cycloolefins, nitrocellulose, acrylates, polyvinyl chloride, copolymers of ethylene acrylates or styrene acrylates in suitable solvents is taken into account, for example. To control adhesion, chlorinated polyolefins are preferably added. The amount of chlorinated polyolefins in the composition may be from 0 to 130 mass% with respect to the base polymer. In particular, radiation curable, for example UV curable or electron curable, varnish layers or a liquid crystal layer can also be used.

Optionally, this first lacquer layer may already contain security signs, such as protective pigments or coloring materials, for example, color, heat sensitive, luminescent pigments or coloring materials, embossed micro or macro structures, surface relief, diffraction gratings, diffraction structures, holograms, lenticular structures, moire structures and the like.

If the first varnish layer contains security signs in the form of a hologram obtained by embossing, microlenses or other surface relief, preferably the first varnish layer is a thermoplastic embossable varnish layer, for example based on PMMA, or a UV curable varnish layer with embossing. Such layers and methods for their preparation are known, for example, from EP 1352732 A or EP 1 310 381 A, references to which are included in this work.

The applied mass of the first layer of varnish is from 1 to 10 g / m ² , preferably from 1 to 5 g / m ² ,

In addition to regulating adhesion to the substrate, the first layer of varnish also has a protective function, since after transfer this layer is at the very top and is subjected to mechanical and / or chemical and / or thermal stress during further processing of the layer with the applied transfer element. Therefore, it is preferable that the first varnish layer, due to a suitable varnish composition, have excellent physical and chemical resistance.

In another embodiment, the first lacquer layer may be any lacquer layer, but a layer is further applied between the given varnish layer and the substrate to facilitate separation. This separation-promoting layer may, for example, consist of a thin layer of wax or silicone, and this layer enables targeted regulation of adhesion between the first layer of varnish and the substrate. Upon transfer, the separation promoting layer is separated along with the substrate. The applied mass of such a separation promoting layer is typically less than 0.5 g / m ² .

The transfer element may contain other mono- or multifunctional layers, which are also known from common security elements.

In particular, in this work, fully or partially deposited layers of metals, metal alloys and metal compounds are proposed. Suitable metal layers are layers of Al, Cu, Fe, Ag, Au, Cr, Ni, Zn, Sn, Pt, Ti, Pd and the like. Suitable alloys are, for example, Cu-Al alloys, Cu-Zn alloys and the like. Suitable metal compounds are, for example, metal oxides or sulfides, in particular TiO ₂ , Cr oxide, ZnS, indium tin oxide, antimony tin oxide, antimony zinc, FTO, ZnO, Al ₂ O ₃ or silicon oxide. Metal layers can be applied using the PVD or CVD (ion sputtering, thermal sputtering) method. Metal layers in the visible and / or infrared and / or ultraviolet region of the spectrum can be opaque, or partially transparent, or transparent and have a high or low refractive index so that it is possible to purposefully create an optical layer system.

Preferably, the metal layers have recesses in the form of letters, signs, symbols, lines, guilloche, numbers or inscriptions, which when viewed in transmitted light form a contrast. Suitable methods for producing such partial metal layers, for example, are described in DE 19739193 A or EP 1332238 A.

Instead of sprayed metal layers, printing or applying varnish with metallic pigments can also be used.

Further, the transfer element may also have layers of paint and / or varnish with optical, optically variable, magnetic or electrically conductive properties.

As the layers of paint or varnish, various compositions can be used. The compositions of the individual layers can, in particular, vary depending on the task, that is, on whether the separate layer serves exclusively decorative purposes or should it be a functional layer, or should there be a layer of both decorative and functional.

These layers may be pigmented or non-pigmented. As pigments, all known pigments can be used, such as, for example, titanium dioxide, zinc sulfide, kaolin, ITO, ATO, FTO, aluminum, chromium and silicon oxides, as well as colored pigments. In this case, aqueous and solvent-based varnish systems can be used, as well as solvent-free or radiation curable systems.

Preferably, the pigments are in dispersions of polymer acrylates with a molecular weight of 150,000 to 300,000, in acrylate-urethane dispersions, acrylate-styrene or PVC containing dispersions, or similar solvent containing dispersions.

The optical properties of the layer can be influenced by visible dyes or pigments, luminescent dyes or pigments that fluoresce or phosphoresce in the visible region, the UV region or in the IR region, effective pigments such as liquid crystals, pearlescent, bronze and / or multilayer color-changing pigments and photochromic, heat-sensitive paints or pigments. These substances can be used in all possible combinations. Additionally, phosphorescent pigments can also be used alone or in combination with other coloring agents and / or pigments.

The electrically conductive layers may be metallic or non-metallic or polymeric conductive layers, whereby the already mentioned metal layers can be substantially taken into account as a metallic electric conductive layer.

It is also possible to use dispersions pigmented with soot, graphite or silver or solutions in an ethylene acrylate copolymer, nitrocellulose, PVB, PA, acrylate or PVC, or in their copolymers.

The pigment content can be up to 90%, preferably the binder content is from 20 to 70%.

The polymer conductive layer of electricity can be formed from, for example, polyacetylene, poly-p-phenylene, polypyrrole, polythiophene, poly-p-phenylenevinylene, low molecular weight macrocyclic semiconductors, organopolysilanes, sulfur polynitride and / or polyaniline and / or their derivatives. Preferably, polyaniline or polythiophene is used as the conductive polymer.

Magnetic properties of a layer can be imparted with the help of paramagnetic, diamagnetic, and also ferromagnetic substances, such as iron, nickel, and cobalt, or their compounds or salts (for example, oxides or sulfides), or alloys of rare-earth metals, such as, for example, cobalt alloy /samarium.

Especially suitable for obtaining magnetic protective signs of paint with magnetic pigments based on oxides of iron, nickel, cobalt and their alloys, barium or cobalt ferrites, hard magnetic and soft magnetic grades of iron and steel in an aqueous or solvent-containing dispersion. As solvents, for example, isopropanol, ethyl acetate, methyl ethyl ketone, methoxy propanol and mixtures thereof are taken into account.

Preferably, the pigments are in a dispersion of polymeric acrylate with a molecular weight of from 150,000 to 300,000, in dispersions of acrylate-urethane, styrene-acrylate, nitrocellulose or PVC-containing dispersions or similar solvent-containing dispersions.

You can also combine several layers with different magnetic materials, while the magnetic decals can have different coercivity and / or residual magnetization. The magnetic layers can completely or partially overlap each other, be near each other, on top of each other or can be applied to different layers of the transfer element.

The layers of paint or varnish described above are applied by a suitable method of application to an already coated substrate. Examples of suitable methods include the printing method (intaglio, flexographic, screen, offset, pad printing), bitmap or roll application, application through slot nozzles, dipping, casting and extrusion methods.

In principle, all possible combinations of protective decals in one and the same transfer element are possible, and protective decals can be found both individually and in combination in order, for example, to combine a visually recognizable protective decimal sign with a machine-readable inconspicuous protective decimal sign .

The composition in the conclusion or in the intermediate layer may be provided with a protective layer of varnish, which can also be pigmented. The protective layer of varnish has the function of better protection of the layers below it from chemical and physical influences.

In the last step, an adhesive coating is applied to the transfer element. Depending on the substrate on which the transfer element is applied, the adhesive coatings of hot and cold gluing, self-adhesive, radiation-curable adhesive coatings are taken into account as an adhesive layer.

In particular, when applied to temperature-sensitive layers of bilayer or multilayer paper with counterfeit protection, it is preferable to use a radiation curable adhesive system. For applying to paper or paper-like layers, it is preferable to use a thermosetting adhesive.

To embed the transfer element in bilayer or multi-ply paper with anti-counterfeiting paper, the adhesive transfer element is brought into contact with the surface of the material, which forms a layer of a security document, and this surface will be inside.

The transfer element can be applied precisely with lateral and / or longitudinal registering to these optionally provided in the layer of multilayer paper with protection against falsification or on it protective distinctive signs, such as, for example, printing, watermarks and the like, or optionally cutouts in the layers .

In a particular embodiment, the placement of the transfer element takes place in such a way that the transfer element is visible in the recesses of the anti-counterfeit paper layer deposited above it or in existing cutouts.

The transfer element is applied to the anti-counterfeit paper layer and the transfer element is separated from the substrate on which the transfer element arrives during transfer from roll to roll or from sheet to sheet using suitable standard application devices. Depending on the type of adhesive coating, the application takes place under the influence of pressure, and / or temperature, and / or UV or electronic radiation. In the transfer process, the carrier function of the substrate immediately takes the paper layer, and therefore for the transfer element, the self-supporting function is not necessary.

When separating the substrate during the transfer process, only layers with protective decals with an adhesive coating are firmly fixed to the inner surface of the paper layer with anti-counterfeiting. Subsequent receipt of counterfeit multilayer paper does not cause any damage or change to the transfer element.

The thickness of the transferred composition is <20 μm, preferably <10 μm. This is significantly less than that of traditional protective threads and, as a rule, also significantly less than the thickness of individual layers of the combined material. If the transfer element is applied to the paper layer under the influence of pressure and / or elevated temperature, then the transfer process compresses the paper locally, as a result of which, for example, a transfer element with a thickness of 20 μm causes an unexpected local thickening of 20 μm as well, but leads to a local thickening < 5 microns. Due to the small thickness of the transfer element, and additionally due to the compression of the paper during the transfer process, a uniform thickness of the security paper is ensured along the entire length and the problems described at first are not encountered when stacking or winding in rolls.

In order to further improve the uniformity of the thickness, it is possible to make recesses before applying the transfer element, for example, by calendering in the area of subsequent application or by purposefully thinning the paper layer during paper production.

Application can be made both on a continuous layer of paper with protection against counterfeiting, and on a layer with slots previously obtained by cutting, cutting or similar methods. Then the transfer element is superimposed over the through holes. Further, the layers can be cut or cut after being applied in the area of the transfer element, so that both the anti-counterfeit paper layer and the transfer element are cut in at least some areas. As a result, the window area remains completely transparent and the application of the transfer element is not an obstacle.

After the transfer element was applied to the layer of anti-counterfeit multilayer paper in the first stage, this layer was combined with one or more other layers of anti-counterfeit paper. This process can take place from sheet to sheet or, preferably, from roll to roll. The application of the transfer element can be carried out in the same technological operation as receiving multilayer paper with counterfeit protection (in-line (built-in)) or in a separate technological operation (off-line (offline)).

The connection of the individual layers occurs, as a rule, in the gap between the optionally heated pair of rollers, which exert pressure and / or temperature on one or more materials of the layers of the combined material, which have a sufficiently low melting point so that other materials are not destroyed, the joining process can only occur under the influence of pressure and temperature so that a stable connection is achieved. If there is a danger that individual layers can be destroyed by too high a temperature, the process temperature can be significantly reduced by using glue to join the layers. This glue can harden or cure at room temperature or at a significantly lower temperature than the temperature at which the layer materials melt. It is also possible to use a radiation curable adhesive, then the temperature load during the connection is very small.

In a preferred embodiment, the production of counterfeit multilayer paper is carried out by the method of so-called extrusion lamination of two or more layers. In this case, between two layers, which, as a rule, consist of paper, a liquid polymer melt is introduced using a slot nozzle, the layers are connected in the gap between the rollers, and then cooled. The extruded layer is a counterfeit paper layer. A similar method, for example, is described in WO 2006/066431 A, the contents of which are given in full.

The figures show an exemplary embodiment of a security document according to the invention and a transfer element.

List of Reference Items

1 Protected Document

2 Holographic tape deposited on the surface of a security document

3 Fully integrated translation element

4 Partially visible translation element

5, 5a, 5b cutouts in the upper paper layer

6 Cutouts in the bottom paper layer

7 Top paper layer

8 polymer layer

9 Bottom paper layer

10 Carrier film

11 Transfer layer

12 Metal coating

13 Adhesion enhancing layer

14 Glue coating

15 Low Coercive Magnetic Ink

15a High Coercive Magnetic Ink

16 Cutouts in the form of characters, coding, etc.

17 surface cutouts

18, 18a Paper layer with printed transfer element

19 Color Change Coating

20 fluorescent coating

21 color printed text

22 layer reflecting electromagnetic waves

23 intermediate layer

24 Layer of metal clusters

25 Partially visible transfer element with cut out contour

26 Bends

27 polymer layer

28 Paper layer without a transfer element

29 Pair of rollers

In FIG. 1 shows a security document 1 according to the invention with a traditional holographic tape 2, which is deposited on the outer surface of the security document. Further, the security document presented has two transfer elements 3 and 4, which are located inside the paper with counterfeit protection. The transfer element 3 is completely embedded between the opaque paper layers 7, 9 and therefore is distinguishable only in transmitted light and not distinguishable in reflected light, like traditional, fully integrated security threads. The transfer element 4 is integrated in such a way that it is visible through the slot 5 in the upper paper layer 7 in place of the slot 6 in reflected light. In the region of the slot 5a, the lower paper layer 9 is cut together with the applied transfer element 4 so that a transparent window is formed if the polymer layer 8 consists of a transparent material.

In FIG. 2a shows the region of the transfer element 3 in cross section along the dashed line A-A in FIG. 1. A security document consists in this case of one upper paper layer 7, a polymer layer 8 and a lower paper layer 9. A transfer element 3 is applied to the lower paper layer 9 and is protected on both sides by at least one paper or polymer layer. The difference in thickness of the lower paper layer 9 in the region of the applied transfer element 3 is partially compensated by the slightly reduced thickness of the polymer layer 8. Nevertheless, the total thickness of the security document 1 in place of the integrated transfer element 3 does not differ significantly from the thickness outside this area.

In FIG. 2b shows a security document in the cutout region 5 in cross section along the dotted line B-B in FIG. 1. In this case, the same protected document consists of an upper paper layer 7, a polymer layer 8 and a lower paper layer 9. However, the upper paper layer 7 is cut in place of the transfer element 4 (slot 5), for example, by cutting or cutting. If a transparent polymer is used for the polymer layer 8, then the transfer element 4 is distinguishable in reflected light from the side of the upper paper layer 7. On the reverse side, the transfer element 4 is hidden and distinguishable only in transmitted light.

In FIG. 2c shows a security document in the area of the slot 5a in cross section along the dotted line C-C in FIG. 1. In contrast to the situation in FIG. 2b here also the lower paper layer 9, together with the applied transfer element 4, is cut in the form of a slot 6. This is achieved by the fact that the lower paper layer 9, after applying the transfer element 4, is cut or cut.

It is also assumed that both paper layers 7 and 9 in place of the transfer element 4 have slots, and the transfer element 4 does not have and overlaps the slot 8. The transfer element 4 is at the same time distinguishable from both sides in reflected light. The slots 5a and 6 can also be offset on the upper and lower paper layers so that the transfer element 4 on the upper and lower sides of the security document 1 is distinguishable in reflected light at different places.

In FIG. 3 shows an exemplary structure of a transfer element 3 or 4 with optical and machine-readable security decals before application. On the substrate is first a detachable layer of varnish 11. Then follows a layer of metal 12 with slots 16 in the form of negatives of signs, symbols, encodings or other structures distinguishable in transmitted light. Machine-readable structures, such as low coercive magnetic regions 15 and high coercive magnetic regions 15a, are located in a region not provided with cutouts 16. To overlap, as a rule, the dark magnetic regions, then the next reflective layer of metal 12 is applied, which has slots 17, which are arranged so that the cuts 16 in the first metal layer 12 are visible in transmitted light. This sequence of layers is protected by a protective varnish 13 from physical and chemical influences. Finally, an adhesive layer 14 is applied by which the transfer element can be applied to the layer of the security document.

The state after applying protective decals to one of the layers of the security document is shown in FIG. 4a in a plan view and in FIG. 4b in cross section along the dashed line D-D in FIG. 4a. Substrate 10 is no longer available after application. In the top view, the recesses 16 in the metal layer 12 are clearly distinguishable as the text “TEST” and the number “100”. The magnetic regions 15 and 15a on both sides are completely covered with layers of metal 12 and therefore do not optically differ from non-magnetic metallized regions, but are detected only using appropriate reading devices. A paper layer coated with a transfer element 18 is used in order to obtain multilayer paper with counterfeit protection for a security document 1.

Further, the transfer element 4 according to the invention with optical properties already applied to the paper layer 9 is shown in FIG. 5a in reflected light and in FIG. 5b in cross section along the dashed line E-E in FIG. 5a. The transfer element 4 has three protective decals in the form of a coating with the effect of a color change when tilted 19, printed at a specific location on the fluorescent coating in the form of the text “100” and the color microprint 21 in the form of the text “TEST”. If we consider the conversion element 4 in daylight, then in places with a coating with the effect of changing light 19, depending on the angle of view, a different color appears. Typically, color changes in such coatings occur, for example, from magenta to green or from green to blue. The color change coating 19 shown in FIG. 5a and 5b, for example, consists of 3 layers: a layer 22 reflecting electromagnetic waves, a transparent intermediate layer 23 and a layer of metal clusters 24. By using the optical properties of the individual layers and the various thicknesses of the intermediate layer, the desired color change effect can be established. Details of the principle of action of such compositions are described, for example, in EP 1716007 A. The printed text 21 is printed with ink having a different color than the ink of the coating with a color-changing effect (e.g., opaque white). Thus, text 21 is clearly distinguishable under daylight conditions and does not change color when changing the angle of view. If the transfer element 4 is illuminated with UV radiation, then the fluorescent coating emits radiation in the visible region of the spectrum. Thus, the transfer element can, on the one hand, be easily checked with the naked eye due to a coating with the effect of a color change 19 and microprint 21, and on the other hand, a second level of protection with a fluorescent coating 20 is additionally offered, which can even be used by non-specialists by simple means. Such a transfer element is especially attractive if it is combined with recesses in one of the layers of the security document and is clearly distinguishable at this point.

Further, in FIG. 6 shows a security document 1 according to the invention, which, on the one hand, has a holographic ribbon 2 deposited on the outer surface and, on the other hand, has a transfer element 25, which is distinguishable in two regions through recesses 5b in the upper paper layer 7. The transfer element 25 has two ground bends 26, one angular and the other elliptical in shape. The shape of the transfer element 25 was given already upon receipt by cutting along the contour. A visible and invisible transfer element may be located in the recess area. Using this method, you can better use the area of the windows, while in areas in which protective decals are fully integrated, the impression of a traditional protective thread.

Various methods for producing a composite material are shown in FIG. 7a-7c. The paper layer coated with the transfer element 18 or 18a, the polymer layer 21 and the paper layer without the transfer element 22 are connected in the gap between the pair of rollers 29 when exposed to pressure and / or temperature and / or radiation. The preformed paper layer with the transfer element 18 or 18a may be either the outer layer of the composite material (FIG. 7a) or the central of the three layers of the composite material (FIG. 7b). It is always important that the transfer element is located on the surface of the composite material lying inside. In FIG. 7c shows a two-layer composite material consisting of one layer with a transfer element 18 or 18a and another layer 28.

Example of structure 1 (machine-readable translation element, for comparison, Fig. 4a and 4b):

23 micron PET substrate

UV-curable transfer varnish, applied weight 3 g / m ² , detachable

partial metallization 2.0 OD,

adhesive coating, applied weight 0.5 g / m ²

low coercive magnetic ink, partial printing

printing ink with metallic pigment, applied weight 1.5 g / m ²

thermosetting varnish, applied weight 10 g / m ²

Example of structure 2 (optically variable transfer element, for comparison, Fig. 5a and 5b):

19 micron PET substrate

cycloolefin copolymer transfer varnish, 4 g / m ² , detachable

partial printing in black ink

partial printing with blue fluorescent printing ink

layer of aluminum clusters, nominal thickness 3 nm

UV curable intermediate layer, 550 nm thick

2.0 OD aluminum reflective layer, sprayed

thermosetting varnish, applied weight 8 g / m ²

Building example 3 (supporting combined material with integrated transfer element):

counterfeit paper with watermarks, weight per unit area, 35 g / m ²

applied to her transfer element according to example 1 or 2, without substrate

polyamide polymer base, approximately 30 microns thick

counterfeit watermarked paper with felling, weight per unit area, 35 g / m ² _.

Claims (29)

1. A security document with at least a partially integrated security element, this security document consisting of counterfeit paper with two or more layers of the same or different materials, characterized in that the security element is made in the form of a transfer element and is applied to inside the surface of one of the layers of anti-counterfeit paper and this security element is at least partially covered with at least one more layer of counterfeit anti-counterfeit paper, at least m Here, one of the layers of anti-counterfeit paper has at least one recess through which the security element is visible. 2. A security document according to claim 1, characterized in that the transfer element is located exactly with the lateral and / or longitudinal register to this at least one recess and is preferably at least partially aligned with this recess. 3. A security document according to claim 1 or 2, characterized in that at least one of the layers of anti-counterfeit paper has at least one security distinctive mark. 4. A security document according to claim 3, characterized in that the transfer element is located precisely with a longitudinal and / or side register to this at least one protective distinguishing mark. 5. A security document according to claim 1, characterized in that the transfer element on the inside of the surface of the paper layer with anti-counterfeiting is fixed with an adhesive coating. 6. A security document according to claim 5, characterized in that the adhesive coating is a thermosetting adhesive coating or cold curing adhesive coating, a self-adhesive coating, a hot-melt adhesive coating or radiation-curable adhesive coating. 7. A security document according to claim 1, characterized in that the layers of anti-counterfeit paper consist of paper, synthetic paper, paper made from cotton raw materials and / or polymer. 8. A security document according to claim 1, characterized in that the anti-counterfeit paper layer on which the transfer element is applied has a recess at the place of application of the transfer element. 9. A protected document according to claim 8, characterized in that this recess is made before applying the transfer element. 10. A security document according to claim 8 or 9, characterized in that this recess is obtained due to the compression of a layer of paper with anti-counterfeiting when applying the transfer element. 11. A security document according to claim 1, characterized in that the transfer element is formed of a varnish layer and one or more continuous and / or non-continuous layers with functional properties, wherein the thickness of the transfer element is from 3 to 25 μm, preferably lies in the range from 3 up to 18 microns, particularly preferably in the range of 6 to 18 microns. 12. A security document according to claim 11, characterized in that a thin layer of varnish and a layer or layers with functional properties are applied to a similar film substrate before being applied to one of the layers of the security document. 13. A security document according to claim 12, characterized in that the thin layer of varnish is detachable. 14. A security document according to claim 13, characterized in that a detachable coating is located between a thin layer of varnish and a similar film substrate. 15. Protected document according to one of paragraphs. 11-14, characterized in that the thin layer of varnish has an embossed structure. 16. Protected document according to one of paragraphs. 11-14, characterized in that the layer or layers with functional properties have electrically conductive and / or optical and / or optically active signs. 17. Protected document according to one of paragraphs. 11-14, characterized in that the layer or layers with functional properties have magnetic signs. 18. A protected document according to claim 17, characterized in that the transfer element has several layers with magnetic decals made of materials with the same or different coercivity and / or residual magnetization. 19. A security document according to claim 18, characterized in that the magnetic decals are applied on the entire surface or partially next to each other, one above the other, with partial or complete overlap and / or are in different planes of the transfer element. 20. Protected document according to one of paragraphs. 11, 18 or 19, characterized in that the transfer element has a combination of several protective decals in the form of continuous and / or non-continuous layers. 21. A security document according to claim 11, characterized in that the transfer element is provided with a protective layer of varnish. 22. A method of producing counterfeit paper for a security document with at least a partially integrated transfer element, characterized in that this transfer element is first fed onto the substrate, applied to the inner surface of the anti-counterfeit paper layer when the substrate is separated and fixed using an adhesive coating, and then in one or more of the following steps, one or more of the following layers are connected to this first layer, and at least one of the layers of anti-counterfeit paper has at least one recess through which the protective element is distinguishable. 23. The method according to p. 22, characterized in that both stages are carried out jointly or independently. 24. The method according to p. 22 or 23, characterized in that the application of the transfer element is carried out from roll to roll or from sheet to sheet. 25. The method according to p. 22, characterized in that the application of the transfer element is carried out with accurate registration to a watermark, print and / or cutout in at least one layer of paper with protection against counterfeiting. 26. The method according to p. 22, characterized in that the layers of paper with anti-counterfeiting are connected using extrusion caching. 27. The method according to p. 22, characterized in that the layers of paper with anti-counterfeiting are connected using glue for caching. 28. The method according to p. 22, characterized in that the layers of paper with anti-counterfeiting are connected by lamination without glue. 29. The method according to p. 22, characterized in that the preparation of the multilayer composite material is carried out under the influence of pressure and / or temperature, and / or UV or electronic radiation.

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