EP1857295B1 - Safety element - Google Patents
Safety element Download PDFInfo
- Publication number
- EP1857295B1 EP1857295B1 EP07009604.5A EP07009604A EP1857295B1 EP 1857295 B1 EP1857295 B1 EP 1857295B1 EP 07009604 A EP07009604 A EP 07009604A EP 1857295 B1 EP1857295 B1 EP 1857295B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- metallic
- security element
- machine
- verifiable
- 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.)
- Revoked
Links
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
- D21H21/42—Ribbons or strips
-
- 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
-
- B42D2033/04—
-
- B42D2033/10—
-
- B42D2033/16—
Definitions
- the invention relates to security elements for security papers or documents of value, such as banknotes or identity cards.
- the security elements have at least in transmitted light, possibly also in incident light, visually recognizable characters, patterns or codes as well as additional substances for machine testing.
- the invention also relates to methods for producing the security elements and security papers and security documents equipped with the security elements.
- Security elements in the form of threads, tapes or labels used to authenticate banknotes, checks, credit cards, identity cards and the like or used for product marking are known.
- Such security elements typically consist of a light-permeable, ie translucent carrier material with a metallic coating.
- the metallic coating contains recesses in the form of letters, numbers, patterns or other signs. The recesses are visually recognizable and are particularly visible when looking at the security element against the light. The recesses then form a bright contrast against the dark appearing metallic coating.
- a security element for a security document such as a banknote, identity card or the like, which consists of a translucent plastic layer comprising an opaque layer with visible in transmission recesses in the form of characters, patterns or the like and a magnetic layer, which is arranged under the opaque layer , wherein the magnetic layer is in the form of spaced-apart magnetic regions which form an encoding and the recesses are arranged in the magnetic-layer-free intermediate regions of the coding.
- Machine readable filaments using electrical conductivity and / or magnetism as test criteria are often used for automated banknote processing. These machine-readable properties of the threads are produced by printing suitable colors (functional colors) inside the laminate structure of the threads. The internal structures are well protected from chemical and mechanical stresses by covering films. The imprint of the functional colors, which impart the machine-testable properties, typically takes place in strip form along the thread axis or in the form of blocks perpendicular to the thread axis.
- a security element for security documents which has both a negative writing and a magnetic security feature.
- the security element consists of a translucent plastic film as a carrier material with a first metallization layer, to which in turn a layer of magnetic ink and a further metallization layer are applied.
- the metallization layers are vacuum-deposited metal layers or metallic effect layers, ie layers of metal pigment-containing paint or metalimitation paint.
- the negative writing is produced by printing the carrier material with an activatable printing ink in the region of the later negative writing before applying the layer structure. Activating the ink will cause the areas of the ink over the ink to become darker Layer structure removed and there are recesses in the form of negative writing.
- the activatable inks are inks that soften by heat, thereby reducing adhesion to the substrate, or inks that contain intumescent additives that release gas when heated, thereby also reducing adhesion to the substrate and the overlying layers be arched.
- the disadvantage is that the simultaneous removal of several layers leads to recesses whose contours are not as sharp as would be desirable, which is not tolerable, especially with small characters.
- the first metallization layer and the magnetic pigment-containing printing ink are applied only to partial regions of the carrier material.
- the negative writing is printed with an activatable ink and then applied over the entire surface of the other metallization.
- a security element which consists of an at least translucent plastic layer having an opaque layer with recesses, which form a negative font, and a machine-readable magnetic coding, wherein the recesses are arranged in the retegnet harshelle areas of the security element.
- the magnetic coding is covered by another opaque layer so that it is invisible to a viewer.
- the opaque layers are metallization layers, ie vapor deposited metallic layers or layers printed with metallic pigment containing colors.
- the recesses of the negative writing and the magnetic regions may be geometrically arranged on the security element in different ways.
- the negative writing in the metallic coating is produced by printing a soluble ink layer in the form of negative writing to be formed on the support plastic layer, then vapor-depositing the metal and then dissolving the soluble ink with a solvent, the ink together with the ink thereon evaporated metal is removed.
- the machine-readable security features are generated by means of so-called function colors.
- the functional colors contain metallic pigments, such as. As iron oxides, for the award of magnetic properties (magnetic paint), or electrically conductive particles, such as. Conductive carbon black, for imparting electrical conductivity (conductive ink), or both metallic pigments and conductive particles when magnetic properties in combination with electrical properties are desired.
- the functional colors are therefore usually physically black or brown and roughly structured. Since the machine-readable layers should not disturb the optics of the security element and the machine readability of a security element should not be apparent to the unaided eye, the layers are covered, usually by means of metallization layers, as disclosed in the aforementioned publications. The visual appearance in terms of color and texture of the surfaces should be as far as possible identical on both sides of the security element, d. h., the security element should not be "two-sided".
- the functional colors with metallic and / or conductive pigments Due to the composition of the functional colors with metallic and / or conductive pigments, it can in direct contact with a metallic Layer, for example, a vapor-deposited aluminum layer, as is often used for security elements, in the presence of moisture to the formation of a galvanic element and thus come to corrosion. Traces of moisture are sufficient. The presence of moisture can be found in security papers and documents of value such. B. banknotes, can not be excluded. For example, they are used in humid climates or may accidentally be washed with a garment. Also in the manufacturing process, especially in the generation of negative writing, the security elements can come into contact with moisture, as will be explained later.
- a metallic Layer for example, a vapor-deposited aluminum layer, as is often used for security elements, in the presence of moisture to the formation of a galvanic element and thus come to corrosion. Traces of moisture are sufficient. The presence of moisture can be found in security papers and documents of value such. B. banknotes, can not be excluded. For example,
- plastic carrier film metallic effect layer
- machine-testable layer metallic effect layer
- metallic layer metallic layer
- the metallic effect layer between the machine-testable layer and the metallic layer prevents with good reliability the formation of a galvanic element and thus a corrosion of the security element, but also has a number of disadvantages.
- the pressure of the metallic pigments is relatively expensive.
- the paint does not print well because of the high level of metal particles that give the metallic sheen, and if the viscosity is too low, the paint tends to splash.
- the poor processability leads to great problems in controlling the printing, because the cover must be printed in the register on the magnetic pressure, which in turn leads to increased waste.
- the squeegees must be changed frequently during production, since the metal pigment-containing colors are highly abrasive, so that production often comes to a standstill.
- the drying of the layer sequence of metal effect layer, machine testable layer, metal effect layer is extremely difficult, which is due to the high porosity of the layers, which allows a displacement of the solvent from one layer to another.
- the solvent appears to strike away from the metallic effect layer in the machine coat of functional ink.
- the stripped solvents may "boil" during later drying operations and form bubbles in the layers.
- the high residual solvent levels lead to problems in the metallization, because no good vacuum can be achieved, during lamination, because unwanted reactions can occur with the laminating lacquer, and when cutting the security elements to the desired dimensions, since magnetic abrasion can occur.
- the security element shows a clearly two-sided appearance.
- the reason is that the pressure of a metal effect layer on a smooth plastic carrier film gives a relatively smooth glossy image, while the printing of a metallic effect layer with the same composition on the machine testable layer does not give a smooth, but a rather coarse textured image.
- the functional colors magnetic coatings, conductive inks
- the metal pigment-containing paints or imitation paints for forming the metallic effect layer are relatively expensive, and their use also entails high tooling costs because of their high abrasiveness. Gravure cylinder and squeegee must be changed frequently.
- the object of the present invention is therefore to provide a security element for a security paper or a document of value, which has a metallic coating with recesses recognizable at least in transmitted light as well as a machine-testable layer with at least one machine-testable feature, in which corrosion problems are avoided and those mentioned above Disadvantages eliminated or at least reduced.
- a security element with the above-mentioned layer sequence, plastic carrier film, Metal effect layer, machine-testable layer of functional ink, metallic layer with recesses in function-color-free areas, between the machine-testable layer and the metallic layer, a paint layer applied.
- the security element can be created as follows:
- a translucent, transparent or at least translucent carrier film which is as transparent as possible for example a polyester film, preferably a PET film, is coated with a metallic effect composition, i. H. a metal pigment-containing paint or a Metallimitations shall, printed, wherein at least the portions of the film, which are to have the recesses later, must remain free (open areas of the metallic effect layer).
- a mechanically testable layer in particular a composition with at least one machine-testable substance, eg. As magnetic paint and / or conductive ink, printed, the printed area must not be greater than the area printed with the metallic effect composition surface, so that the machine-testable layer, viewed from the opposite side, is not visible.
- a lacquer layer is printed.
- a colorless paint can be printed over the entire surface, a dyed paint must be printed so that it remains invisible when the security element is viewed from the opposite side.
- a removable ink in the form of characters, patterns or codes is printed on the free areas of the carrier film or optionally on the printed only with the paint layer areas of the carrier film.
- the order of the printing processes is not essential. It can also be printed first, the removable ink and then the remaining layers, but where possible the removable ink not from the Protective lacquer layer should be overprinted.
- Suitable peelable inks and methods of detachment are, for example, in EP 0 330 733 , in the WO 92/11142 and in the WO 99/13157 which is incorporated herein by reference. Particularly preferred is in the WO 99/13157 revealed soluble color.
- the paint has a high pigment content and, after drying on the printing substrate, forms a raised application of paint having a porous structure with a large surface area. Subsequently, a metallic coating, for example made of aluminum, iron, cobalt or nickel, applied over the entire surface, preferably by evaporation in vacuo. The machine-testable layer is no longer visible, no matter from which side the security element is viewed. In the areas of the recesses, the removable printing ink with the metallic coating overlying it is then removed again. With regard to appropriate procedures, reference is made to EP 0 330 733 , the WO 92/11142 and the WO 99/13157 directed.
- the security element preferably further protective and / or the application to or the introduction into a paper facilitating layers are applied. Suitable layers are associated with Figure 11 described. Finally, the finished layer structure can then be cut to the desired dimensions of the security element.
- the metallic coating does not form a coherent metal layer due to the highly porous surface of the paint application.
- the Demetallmaschine in the field of printed characters, patterns or codes is particularly easy by means of a washing process possible.
- the washing liquid may be the discontinuous coating easily penetrate. It is therefore easy to wash off the ink together with the discontinuous metal layer.
- the action of the washing liquid can be assisted by mechanical means such as brushing, rolling, or ultrasound.
- the releasable ink contains water-soluble binders, so that water can be used as a washing liquid.
- the carrier film For demetallizing, ie for removing the printing ink together with the applied on the ink areas of the metal layer, the carrier film is completely immersed in water. After demetallization is carefully dried. Nevertheless, traces of residual water can remain, which act as an electrolyte and cause corrosion. Also, by later migrating moisture over the cut edges of the security element in the layer structure inside corrosion can be caused.
- the lacquer layer between the machine-testable layer and the metal layer reliably prevents such corrosion phenomena. In addition, it has a number of other advantages over the metallic effect layer used hitherto.
- the lacquers In contrast to the metallic effect compositions, the lacquers contain no solid particles and are therefore easy to print. Difficulties in controlling a register-containing pressure do not occur or only to a small extent and the rejects are noticeably reduced. In addition, the service life of cylinders and squeegees are very high.
- a paint For a paint, other solvents may be used than for a metallic effect composition, for example, ethanol instead of ethyl acetate.
- ethanol instead of ethyl acetate.
- the drying of the paint is thereby much easier, since a displacement of the solvent are avoided in another layer can. Also resulting from the difficult drying resulting problems are avoided.
- the smoother surface achieved by coating with paint has even more advantages.
- the risk of breakage of the vapor-deposited metallic coating under mechanical stress, for example when demetallizing, is reduced.
- the electrical conductivity of the security element is thus better protected against circulation conditions.
- the smoother surface of the covered machine-testable layer also simplifies the demetallization in the washing process.
- Another advantage is the low cost of a paint compared to a metal pigment-containing ink or a Metallimitations unit.
- the reduced tool costs due to the lack of abrasion of a protective varnish also make a book.
- the paint protects the layer structure against chemical attack.
- a suitable chemically resistant lacquer must be chosen.
- suitable lacquers are chemically resistant and transparent nitrocellulose-based lacquers, polyamide, PVC-based or else crosslinking, transparent lacquers, for example isocyanate-crosslinking polyurethanes.
- the embodiment described above also has some disadvantages that it has in common with the prior art and that inter alia related to the fact that the metallic layer in which the recesses are formed as the last layer of the layer sequence metallic effect layer, machine testable layer, metallic layer, is applied.
- the metallic effect layer and the machine-testable layer build up relatively strongly. For winding technical reasons, therefore, the roll length is limited before the application of the metallic layer. In addition, only relatively short webs can be printed because of the high abrasiveness of the magnetic paint / conductive ink. The vacuum deposition of the metallic layer therefore takes place on rollers of relatively small length, so that relative to the roll length of the produced at startup and stop Committee is correspondingly high.
- the surface to which the metallic layer is vapor-deposited is relatively uneven, because the metallic effect layer and the machine-testable layer deposited thereon form raised areas with deeper areas therebetween.
- the metallic layer covers elevations and depressions alike.
- demetallization between the functional-color blocks may become difficult. It can lead to unclean washout and imprecise recesses. Unwanted washouts during demetallization can also be caused by a so-called toning of the binder, which occurs again and again when printing magnetic paint / conductive ink.
- toning here refers to the phenomenon that when gravure on the surface of the gravure cylinder, a more or less thin binder film remains, which can lead to doctor blade in the printed image.
- the uneven surface can also lead to the fact that in certain geometrical arrangements of the machine-testable layer, for example in the form of functional color blocks, such as magnetic paint blocks, the thin, vapor-deposited metal layer is mechanically stressed during demetallization so that it breaks, and the previously given conductivity is interrupted. For security elements with required conductivity, it is therefore necessary to additionally provide a printed conductive ink layer.
- the security element according to the second aspect of the invention has the following layer sequence: transparent or at least translucent plastic film, metallic layer with recesses in the form of characters, patterns or codes in functional color-free areas, protective lacquer layer or primer or primer layer, machine-testable layer of functional ink (eg Magnetic lacquer / Leitlack), Metalltechnischs harsh, ie for the Viewer metallic appearing layer.
- the layer that appears metallic to the viewer is expediently provided by a metallic effect layer or a metallic layer.
- a releasable printing ink in the form of the recesses to be formed, ie with the desired demetallizing motif, is printed on a transparent or at least translucent carrier film.
- the printed carrier film is provided with a metallic layer, for example of aluminum or another metal; Preferably, the metal is evaporated in vacuo.
- the carrier film is demetallized, ie in the areas printed with the ink, the releasable ink is removed together with the metal deposited thereon.
- the demetallization process depends on the removable printing ink used. It may optionally be mechanically supported.
- a transparent or at least translucent adhesive layer or protective lacquer layer is now printed over the entire surface.
- the primer layer protects against the formation of a galvanic element between the metallic layer and the subsequent machine-testable layer. Depending on the type of paint, it can also improve the adhesive properties between the metallic layer and the machine-testable layer (adhesion promoter) and / or increase the chemical and / or mechanical resistance of the security element compound.
- suitable lacquers are lacquers based on nitrocellulose, PVC-based, polyamide-based or crosslinking lacquers, in particular isocyanate-crosslinking polyurethanes.
- the machine testable layer z. B. of magnetic paint and / or conductive ink, printed on and followed by a seemingly metallic layer, for. B. a layer of metallic effect paint, such as a metal pigment-containing printing ink.
- the metallic effect color covers the machine-testable layer, which is now no longer visible from any side of the security element.
- the machine-testable layer is expediently formed from a composition containing at least one machine-testable substance.
- the materials to be used for this aspect of the invention are the same as in the first aspect of the invention.
- This embodiment has the advantages of the first-mentioned embodiment as well as additional advantages.
- the mechanical stress during demetallization is low, whereby the risk of interruption of the electrical conductivity is substantially reduced.
- the pressure of (additional) Leitlackspuren can therefore be omitted.
- the flat surface also allows a more precise, contour-sharp demetallization without dirty washouts. Since the demetallization takes place prior to printing the function color, any toning of the function colors also has no influence on the demetallization.
- the inner layers are optically laminated very well.
- the appearance of this side of the security element corresponds to a security element which has only one metallic layer with recesses.
- the security element is applied to a security paper in the correct direction, the further layers and in particular the machine-testable layer can not be recognized. If the security element is not to be visible on the back of the paper, the security element on its back side can be additionally printed with an opaque white layer. This opaque white print can also be used at the same time for online checking of the page-correct insertion on the paper machine.
- a second transparent or at least translucent protective lacquer layer can be provided over the entire surface between the layer of metallic effect ink and the machine-testable layer. Preferably, this layer is printed.
- the second layer of protective lacquer provides the additional advantage that the rough, granular surface of the machine-testable layer is leveled, and on the smoother surface of the machine-testable layer, the metallic effect color results in a more optically homogeneous printed image.
- the optical two-sidedness of the security element is therefore reduced.
- a second metallic layer can also be used as the layer appearing to be metallic.
- the second metallic layer is preferably substantially only in the areas in which the machine testable Layer is provided, provided so that the recesses remain well visible in the applied to the carrier film, the first metallic layer.
- a second protective lacquer layer is printed over the entire area between these layers. In order not to hinder the visibility of the recesses, the second layer of protective lacquer must be transparent or at least translucent.
- the second protective lacquer layer is printed over the whole area and then printed on the areas which are not to be covered with a metallic layer later on, a removable printing ink. At least the area of the recesses in the first metallic layer is to be printed with the removable printing ink. Thereafter, the second metallic layer is evaporated and then demetallized with a suitable demetallization process, depending on the used Ablösbarer printing ink in the releasable ink printed areas.
- the cover by the second metallic layer has the advantage that it greatly reduces the visibility of the magnetic paint or Leitlack blocks, since the optical properties are dictated by the metal layer. It remains only the visibility by a certain roughness of the covered layers, especially in the magnetic paint printing, which is already well balanced by the protective coating. It can be even further reduced by additionally printing the machine-testable layer with metallic effect ink and providing the second protective lacquer layer on the layer of metallic effect ink.
- the metallic appearing layer can be printed with an additional covering layer of protective lacquer.
- Fig. 1 shows an inventive document of value 1, such as a banknote, in which a security element 2 is embedded in the form of a so-called window security thread.
- the security thread 2 is quasi woven into the pulp during paper production, so that it occurs at regular intervals directly to the work document surface, which is indicated by the hatched box.
- Fig. 2 shows a security element according to the invention, as it presents itself to a viewer in supervision.
- the observer sees a metallic or at least metallic appearing layer, the recesses 9, in the embodiment in the form of a so-called negative writing has.
- a machine-testable layer 5 is covered by a metallic layer 7 and therefore can not be located without additional aids.
- the machine-testable layer 5 is arranged in a region of the element 2, in which there are no recesses 9, around the recesses 9 not to cover up. It is understood that the recesses do not necessarily have to be a "font", but that they include any characters, representations or motifs.
- the Fig. 3 and 4 show a security element according to the invention, cut along the line AA in Fig. 2 , in different stages of production.
- a translucent plastic carrier film 3 for example a PET film, is printed with a metallic effect layer 4, for example a metal pigment-containing printing ink.
- the metallic effect layer 4 and the machine testable layer 5 are flush with each other. This is not mandatory; It is only essential that the machine-testable layer is completely covered by the metallic effect layer 4 when the security element 2 is removed from the film side (lower side in FIG Fig. 3 ).
- the machine-testable layer 5 is covered by a metallic layer 7 vapor-deposited over the entire area.
- the metallic layer 7 also extends over the regions of the plastic carrier film 3 which are not printed with the metallic effect layer 4 (free areas). In these areas, the plastic film 3 is printed with a removable printing ink 8 in the form of the recesses 9 to be formed.
- a layer of protective lacquer 6 which prevents the formation of a galvanic element between the machine-testable layer 5 and the metallic layer 7.
- the layer of protective lacquer 6 should be larger than the machine-testable layer 5, ie it should extend beyond the areas printed with the layer 5. In this way, contact between the metallic layer 7 and the machine-testable layer 5 on the flanks is prevented.
- Fig. 4 shows the security element 2 according to Fig. 3 after demetallization.
- the metallic layer 7 now has recesses 9 in the form of negative writing. By demetallizing the metallic layer 7 was removed together with the removable printing ink 8 at these points.
- Fig. 5 shows the same type of security element as the Fig. 3 and 4 in the production as rolls before cutting.
- the security elements 2 according to the invention can theoretically be produced individually, in practice they are produced and cut to size as roll goods.
- Fig. 5 shows a section with two security elements, which are to be separated along the line BB.
- the geometric arrangement of the layers metal effect layer 4, machine testable layer 5, protective lacquer layer 6 and metallic layer 7 differs Fig. 5 from in the Fig. 3 and 4 shown arrangement. They are not flush with each other, but designed so that the machine-testable layer 5 is completely covered on one side by the metallic effect layer 4 and on the other side is completely covered by the metallic layer 7.
- the protective lacquer layer 6 covers both the machine-testable layer 5 and the metallic effect layer 4 and extends to the plastic film 3. However, this is only possible if the protective lacquer is transparent or translucent, since it would otherwise be visible on at least one side of the security element. If he does not hinder the demetallization of the recesses 9, a transparent or translucent protective lacquer can alternatively also be applied over the entire surface.
- the protective coating on the metallic effect layer and on the mechanically testable layer provides a substantially smooth surface. This is particularly advantageous if, as the removable printing ink 8, a washing ink according to FIG WO 99/13157 with very porous surface is chosen. The contrast between the surface textures is then particularly high and favors a clean washout in demetallization, ie recesses with sharp contours.
- the Fig. 6 to 10 show the layer structure of security elements 2, in which the metallic layer 7, in which the recesses 9 are formed, applied as a first layer directly on the carrier film 3, in particular vapor-deposited.
- a printing ink 8 preferably a soluble printing ink, in the form of the recesses to be produced, for example in the form of a negative writing, is printed on the carrier film.
- a metallic coating such as aluminum, applied over the entire surface, for. B. vapor-deposited in vacuo. This condition is in Fig. 6 shown.
- the carrier film is demetallized with the metallic layer 7 formed thereon, preferably by immersion in water, when the printing ink 8 is a soluble printing ink.
- the printing ink and the areas of the metallic layer 7 thereon are washed off, and the recesses 9 are revealed.
- the washing can be assisted by mechanical means, wherein the planar formation of the metallic layer 7 keeps the mechanical stress of the layer 7 during demetallization low, so that cracking of the layer and a concomitant loss of electrical conductivity can be avoided.
- the metallic layer 7 including the regions of the recesses 9 is covered by a lacquer layer 10 after drying.
- the lacquer layer 10 must be transparent or at least translucent in order not to hinder the visual visibility of the recesses.
- the machine-testable layer 5 for example a magnetic layer of magnetic lacquer, is printed. This procedural status is in Fig. 7 to see. How out Fig.
- the magnetic layer 5 covers only the recess-free areas (the areas with recesses are free areas of the magnetic layer) and is dimensioned, that it remains invisible when viewing the security element from the side of the metallic layer 7, since it is completely covered by the metallic layer 7.
- the magnetic layer 5 is covered by a printed metal effect layer 4.
- the metallic effect layer 4 is either printed directly onto the machine-testable layer 5 or first a second protective lacquer layer 11 is printed over the entire surface of the entire layer structure, as in FIG Fig. 8 shown.
- the metallic effect layer 4 is to be dimensioned so that on the one hand it makes the magnetic layer 5 invisible to a viewer, ie completely covers the magnetic layer 5, but on the other hand leaves the areas of the recesses 9 free, so that they remain visible.
- the protective lacquer layer 11 must also be transparent or at least translucent in order not to impair the visibility of the recesses 9.
- the protective lacquer layer 11 causes a smoothing of the surface of the rough magnetic layer 5 and thus provides a better substrate for the metallic effect layer 4.
- the metallic effect layer 4 thus appears smoother and more glossy to a viewer and thus more similar to the metallic layer 7.
- the protective lacquer layer 11 thus causes a reduction in the optical two-sidedness of the security element 2.
- a metallic layer 12 shown can also be provided.
- care must be taken that the areas of the recesses 9 remain visible and the machine-testable layer 5 is covered.
- at least the areas of the recesses 9 are overprinted with a removable printing ink 8, for example, with the same removable printing ink, as in the application of the metallic layer 7 was used.
- the entire metallic layer 12, for example an aluminum layer can be evaporated over the whole area.
- Fig. 9 shows the resulting layer structure.
- the machine-testable layer 5 is completely covered by the second metallic layer 12 so that it remains invisible to a viewer.
- This layer structure after the demetallization of the metallic layer 12 is in Fig. 10 shown.
- This in Fig. 10 shown security element 2 here additionally has an optional transparent or at least translucent third lacquer layer 13, which additionally protects the security element.
- the second metallic layer 12 has opposite the metal effect layer 4 (FIG. Fig. 8 ) has the advantage that it is visually more similar to the metallic layer 7 which covers the magnetic layer 5 on the other side than the metallic effect layer 4.
- the security element 2 therefore shows, viewed from both sides, a largely identical appearance.
- a further metal effect layer 4 is provided.
- This metallic effect layer 4 is optional and may be omitted. It serves to further improve the visual appearance by laminating the magnetic layer 5 and leveling the rough surface of this layer.
- Security elements such as security threads or security tapes, typically have further layers that serve to protect against chemical and / or mechanical effects and / or the Aufoder or attachability of the security element on or in a security paper promote.
- a suitable layer structure is in Fig. 11 shown. Exactly shows Fig. 11 a security element 2, as it is in Figure 10 is shown, with further layers, before cutting, ie, is shown a section of a roll goods, the three individual security elements 2a, 2b and 2c shows.
- a primer or adhesion promoter layer 15a and a heat sealing lacquer layer 14a are provided on the side of the carrier film 3.
- Protective lacquer layer 13 is followed by an adhesive layer 18, a further plastic film 17, for example made of PET, a primer layer 15b, an opaque white layer 16, a further primer layer 15c and a heat sealing lacquer layer 14b, in this order. It should be particularly pointed to the opaque white layer 16, which represents a certain feature in the layer structure.
- the opaque white layer 16 is provided when a security element should only be visible on one side of a security paper or value document.
- the opaque white print on the back of the security element reduces the visibility of the security element on the back of the paper. In addition, it can be used for online checking of the correct page load on the paper machine.
- the security elements according to the invention can have any desired shape.
- the most common forms are security threads and security tapes.
- the machine-testable areas and the areas with z. B. in the form of a negative writing present recesses geometrically different, for example, in the direction of a security thread alternately or in parallel in the direction of the thread.
- the machine-testable layer may be formed to form an encoding.
- Magnetic encodings in combination with a negative writing is on the WO 98/25236 directed.
- the layer structures listed above are suitable for all security elements with specified magnetic and conductive properties, in particular for corresponding security threads and security tapes. These include, for example, magnetic filaments with and without specified conductivity, magnetically coded filaments with and without electrical conductivity, hologram filaments with recesses, and magnetic tracks or magnetic codes with and without electrical conductivity and filaments with recesses, and magnetic tracks or magnetic codes with and without electrical conductivity, which additionally has a color shift effect for example due to interference effects.
Description
Die Erfindung betrifft Sicherheitselemente für Sicherheitspapiere oder Wertdokumente, wie Banknoten oder Ausweiskarten. Die Sicherheitselemente weisen zumindest im Durchlicht, gegebenenfalls auch im Auflicht, visuell erkennbare Zeichen, Muster oder Codierungen sowie zusätzliche Stoffe zur maschinellen Prüfung auf. Die Erfindung betrifft, auch Verfahren zur Herstellung der Sicherheitselemente sowie mit den Sicherheitselementen ausgestattete Sicherheitspapiere und Wertdokumente.The invention relates to security elements for security papers or documents of value, such as banknotes or identity cards. The security elements have at least in transmitted light, possibly also in incident light, visually recognizable characters, patterns or codes as well as additional substances for machine testing. The invention also relates to methods for producing the security elements and security papers and security documents equipped with the security elements.
Sicherheitselemente in Form von Fäden, Bändern oder Etiketten, die zur Echtheitssicherung von Banknoten, Schecks, Kreditkarten, Ausweisen und dergleichen dienen oder zur Warenkennzeichnung verwendet werden, sind bekannt. Derartige Sicherheitselemente bestehen typischerweise aus einem möglichst lichtdurchlässigen, d. h. transluzenten Trägermaterial mit metallischer Beschichtung. Die metallische Beschichtung enthält Aussparungen in Form von Buchstaben, Zahlen, Mustern oder anderen Zeichen. Die Aussparungen sind visuell erkennbar und werden besonders gut sichtbar, wenn man das Sicherheitselement gegen das Licht betrachtet. Die Aussparungen bilden dann einen hellen Kontrast gegen die dunkel erscheinende metallische Beschichtung. Beispielsweise ist aus der
Zur Erhöhung der Fälschungssicherheit ist es wünschenswert, zusätzliche Sicherheitsmerkmale vorzusehen, die maschinell prüfbar sind. Besonders vorteilhaft sind Merkmale, deren Vorhandensein vom Betrachter und von einem potentiellen Fälscher nicht ohne Weiteres erkennbar ist. Als derartige Merkmale werden beispielsweise Lumineszenzeigenschaften, elektrische . Leitfähigkeit und Magnetismus genutzt. Die metallische Beschichtung verleiht elektrische Leitfähigkeit, die mit geringem Aufwand geprüft werden kann. Ebenfalls mit einfachen und kostengünstigen Prüfvorrichtungen prüfbar sind magnetische Eigenschaften. Besonders vorteilhaft an magnetischen Sicherheitsmerkmalen ist, dass viele Codierungsmöglichkeiten zur Verfügung stehen, da ein Fälscher nicht erkennen kann, welche der magnetischen Eigenschaften, wie Permeabilität, Magnetisierung, Remanenz etc., als Prüfkriterium verwendet wird.To increase anti-counterfeiting security, it is desirable to provide additional security features that are machine-testable. Particularly advantageous are features whose presence is not easily recognizable by the viewer and by a potential counterfeiter. As such features, for example, luminescence properties, electrical. Conductivity and magnetism used. The metallic coating gives electrical conductivity, which can be tested with little effort. Also testable with simple and inexpensive testing devices are magnetic properties. It is particularly advantageous for magnetic security features that many coding options are available, since a counterfeiter can not recognize which of the magnetic properties, such as permeability, magnetization, remanence, etc., is used as the test criterion.
Maschinenlesbare Fäden, bei denen elektrische Leitfähigkeit und/ oder Magnetismus als Prüfkriterien verwendet werden, werden häufig zur automatisierten Banknotenbeärbeitung herangezogen. Diese maschinell lesbaren Eigenschaften der Fäden werden durch Aufdruck geeigneter Farben (Funktionsfarben) im Inneren des Laminataufbaus der Fäden erzeugt. Die innen liegenden Strukturen sind durch abdeckende Folien gut vor chemischen und mechanischen Beanspruchungen geschützt. Der Aufdruck der Funktionsfarben, die die maschinell prüfbaren Eigenschaften verleihen, erfolgt typischerweise in Streifenform längs zur Fadenachse oder in Form von Blöcken senkrecht zur Fadenachse.Machine readable filaments using electrical conductivity and / or magnetism as test criteria are often used for automated banknote processing. These machine-readable properties of the threads are produced by printing suitable colors (functional colors) inside the laminate structure of the threads. The internal structures are well protected from chemical and mechanical stresses by covering films. The imprint of the functional colors, which impart the machine-testable properties, typically takes place in strip form along the thread axis or in the form of blocks perpendicular to the thread axis.
Aus der
Deshalb werden gemäß einer anderen in dieser Schrift beschriebenen Ausführungsform die erste Metallisierungsschicht und die magnetpigmenthaltige Druckfarbe nur auf Teilbereiche des Trägermaterials aufgebracht. In den freien Teilbereichen wird die Negativschrift mit einer aktivierbaren Druckfarbe aufgedruckt und dann vollflächig die weitere Metallisierungsschicht aufgebracht. Durch das Aktivieren der Druckfarbe braucht nun lediglich eine Schicht abgelöst zu werden, was zu einer Negativschrift mit scharfen Konturen führt. 'Therefore, according to another embodiment described in this specification, the first metallization layer and the magnetic pigment-containing printing ink are applied only to partial regions of the carrier material. In the free sections, the negative writing is printed with an activatable ink and then applied over the entire surface of the other metallization. By activating the ink now only one layer needs to be peeled off, which leads to a negative writing with sharp contours. '
Aus der
Generell werden bei Sicherheitselementen die maschinenlesbaren Sicherheitsmerkmale mithilfe sogenannter Funktionsfarben erzeugt. Die Funktionsfarben enthalten metallische Pigmente, wie z. B. Eisenoxide, zur Verleihung magnetischer Eigenschaften (Magnetlack), oder elektrisch leitfähige Partikel, wie z. B. Leitruß, zur Verleihung elektrischer Leitfähigkeit (Leitlack), oder sowohl metallische Pigmente als auch leitfähige Partikel, wenn magnetische Eigenschaften in Kombination mit elektrischen Eigenschaften erwünscht sind. Die Funktionsfarben sind daher physikalisch bedingt meist schwarz oder braun und grob strukturiert. Da die maschinenlesbaren Schichten die Optik des Sicherheitselements nicht stören sollen und die Maschinenlesbarkeit eines Sicherheitselements nicht mit dem unbewaffneten Auge offensichtlich erkennbar sein soll, werden die Schichten abgedeckt, und zwar üblicherweise mittels Metallisierungsschichten, wie in den vorgenannten Druckschriften offenbart. Das optische Erscheinungsbild hinsichtlich Farbe und Struktur der Oberflächen soll dabei nach Möglichkeit auf beiden Seiten des Sicherheitselements identisch sein, d. h., das Sicherheitselement soll nicht "zweiseitig" sein.In general, with security elements, the machine-readable security features are generated by means of so-called function colors. The functional colors contain metallic pigments, such as. As iron oxides, for the award of magnetic properties (magnetic paint), or electrically conductive particles, such as. Conductive carbon black, for imparting electrical conductivity (conductive ink), or both metallic pigments and conductive particles when magnetic properties in combination with electrical properties are desired. The functional colors are therefore usually physically black or brown and roughly structured. Since the machine-readable layers should not disturb the optics of the security element and the machine readability of a security element should not be apparent to the unaided eye, the layers are covered, usually by means of metallization layers, as disclosed in the aforementioned publications. The visual appearance in terms of color and texture of the surfaces should be as far as possible identical on both sides of the security element, d. h., the security element should not be "two-sided".
Bedingt durch die Zusammensetzung der Funktionsfarben mit metallischen und/oder leitfähigen Pigmenten kann es bei direktem Kontakt mit einer metallischen Schicht, beispielsweise einer aufgedampften Aluminiumschicht, wie sie für Sicherheitselemente häufig verwendet wird, bei Anwesenheit von Feuchtigkeit zur Entstehung eines galvanischen Elements und damit zu Korrosion kommen. Spuren von Feuchtigkeit sind ausreichend. Die Anwesenheit von Feuchtigkeit kann bei Sicherheitspapieren und Wertdokumenten, wie z. B. Banknoten, nicht ausgeschlossen werden. So werden diese beispielsweise in feuchten Klimazonen benutzt oder unter Umständen versehentlich mit einem Kleidungsstück mit gewaschen. Auch beim Herstellungsverfahren, insbesondere bei der Erzeugung einer Negativschrift, können die Sicherheitselemente mit Feuchtigkeit in Berührung kommen, wie später noch ausgeführt wird.Due to the composition of the functional colors with metallic and / or conductive pigments, it can in direct contact with a metallic Layer, for example, a vapor-deposited aluminum layer, as is often used for security elements, in the presence of moisture to the formation of a galvanic element and thus come to corrosion. Traces of moisture are sufficient. The presence of moisture can be found in security papers and documents of value such. B. banknotes, can not be excluded. For example, they are used in humid climates or may accidentally be washed with a garment. Also in the manufacturing process, especially in the generation of negative writing, the security elements can come into contact with moisture, as will be explained later.
Es ist daher erforderlich, Schutzmaßnahmen gegen die Entstehung derartiger galvanischer Elemente zu treffen. Zu diesem Zweck ist es bekannt, bei einem Sicherheitselement mit der Schichtfolge Kunststofffolie, Metalleffektschicht, maschinell überprüfbare Schicht aus Funktionsfarbe, metallische Schicht (mit Aussparungen in funktionsfarbefreien Bereichen), wie es beispielsweise aus der
Es ergibt sich dann die Schichtfolge: Kunststoffträgerfolie, Metalleffektschicht, maschinell prüfbare Schicht, Metalleffektschicht, metallische Schicht.The result is then the sequence of layers: plastic carrier film, metallic effect layer, machine-testable layer, metallic effect layer, metallic layer.
Die Metalleffektschicht zwischen der maschinell prüfbaren Schicht und der metallischen Schicht verhindert mit guter Zuverlässigkeit die Bildung eines galvanischen Elements und damit eine Korrosion des Sicherheitselements, ist aber auch mit einer Reihe von Nachteilen verbunden.The metallic effect layer between the machine-testable layer and the metallic layer prevents with good reliability the formation of a galvanic element and thus a corrosion of the security element, but also has a number of disadvantages.
Der Druck der metallpigmenthaltigen Farben ist verhältnismäßig aufwendig. Die Farbe lässt sich wegen des hohen Anteils an Metallpartikeln, die den metallischen Glanz ergeben, nicht gut verdrucken, und bei zu niedriger Viskosität neigt die Farbe zum Spritzen. Die schlechte Verarbeitbarkeit führt zu großen Problemen bei der Steuerung des Drucks, denn die Abdeckung muss im Register auf den Magnetdruck gedruckt werden, was wiederum zu erhöhtem Ausschuss führt. Außerdem müssen während der Produktion häufig die Rakel gewechselt werden, da die metallpigmenthaltigen Farben stark abrasiv sind, so dass die Produktion häufig zum Stillstand kommt.The pressure of the metallic pigments is relatively expensive. The paint does not print well because of the high level of metal particles that give the metallic sheen, and if the viscosity is too low, the paint tends to splash. The poor processability leads to great problems in controlling the printing, because the cover must be printed in the register on the magnetic pressure, which in turn leads to increased waste. In addition, the squeegees must be changed frequently during production, since the metal pigment-containing colors are highly abrasive, so that production often comes to a standstill.
Die Trocknung der Schichtfolge Metalleffektschicht, maschinell prüfbare Schicht, Metalleffektschicht, ist extrem schwierig, was durch die hohe Porosität der Schichten bedingt ist, die ein Wegschlagen der Lösemittel von einer Schicht in eine andere ermöglicht. Insbesondere scheint das Lösemittel von der Metalleffektschicht in die maschinell prüfbare Schicht aus Funktionsfarbe wegzuschlagen. Die weggeschlagenen Lösemittel können bei späteren Trocknungsvorgängen "aufkochen" und Bläschen in den Schichten bilden. Außerdem führen die hohen Restlösemittelgehalte zu Problemen bei der Metallisierung, weil kein gutes Vakuum erzielbar ist, beim Kaschieren, weil ungewollte Reaktionen mit dem Kaschierlack auftreten können, und beim Schneiden der Sicherheitselemente auf die gewünschten Abmessungen, da Magnetabrieb auftreten kann.The drying of the layer sequence of metal effect layer, machine testable layer, metal effect layer is extremely difficult, which is due to the high porosity of the layers, which allows a displacement of the solvent from one layer to another. In particular, the solvent appears to strike away from the metallic effect layer in the machine coat of functional ink. The stripped solvents may "boil" during later drying operations and form bubbles in the layers. In addition, the high residual solvent levels lead to problems in the metallization, because no good vacuum can be achieved, during lamination, because unwanted reactions can occur with the laminating lacquer, and when cutting the security elements to the desired dimensions, since magnetic abrasion can occur.
Das Sicherheitselement zeigt ein deutlich zweiseitiges Erscheinungsbild. Der Grund liegt darin, dass der Druck einer Metalleffektschicht auf eine glatte Kunststoffträgerfolie ein relativ glattes glänzendes Bild ergibt, während der Druck einer Metalleffektschicht mit der gleichen Zusammensetzung auf die maschinell prüfbare Schicht kein glattes, sondern ein eher grob strukturiertes Bild ergibt. Die Funktionsfarben (Magnetlacke, Leitlacke) ergeben wegen der in ihnen enthaltenen groben Pigmente einen sehr rauen Untergrund für den Druck der Metalleffektschicht, und die Metalleffektschicht kann die raue Struktur der Oberfläche nicht ausnivellieren. Wird dann eine metallische Schicht aufgedampft, wirkt sie im Bereich der gedruckten Funktionsfarben daher grob strukturiert, während das Sicherheitselement, von der Gegenseite her betrachtet, homogen glänzend erscheint.The security element shows a clearly two-sided appearance. The reason is that the pressure of a metal effect layer on a smooth plastic carrier film gives a relatively smooth glossy image, while the printing of a metallic effect layer with the same composition on the machine testable layer does not give a smooth, but a rather coarse textured image. The functional colors (magnetic coatings, conductive inks) result due to the coarse pigments contained therein a very rough substrate for the pressure of the metallic effect layer, and the metallic effect layer can not level out the rough texture of the surface. If a metallic layer is then vapor-deposited, it therefore has a coarse structure in the area of the printed functional colors, while the security element, seen from the opposite side, appears homogeneously shiny.
Im Übrigen sind die metallpigmenthaltigen Farben oder Metallimitationsfarben zur Erzeugung der Metalleffektschicht relativ teuer, und ihre Verwendung zieht überdies wegen ihrer hohen Abrasivität hohe Werkzeugkosten nach sich. Tiefdruckzylinder und Rakel müssen häufig gewechselt werden.Incidentally, the metal pigment-containing paints or imitation paints for forming the metallic effect layer are relatively expensive, and their use also entails high tooling costs because of their high abrasiveness. Gravure cylinder and squeegee must be changed frequently.
Aufgabe der vorliegenden Erfindung ist es daher, ein Sicherheitselement für ein Sicherheitspapier oder ein Wertdokument bereitzustellen, das eine metallische Beschichtung mit zumindest im Durchlicht erkennbaren Aussparungen sowie eine maschinell prüfbare Schicht mit mindestens einem maschinell prüfbaren Merkmal aufweist, bei dem Korrosionsprobleme vermieden werden und die vorstehend genannten Nachteile beseitigt oder zumindest verringert werden.The object of the present invention is therefore to provide a security element for a security paper or a document of value, which has a metallic coating with recesses recognizable at least in transmitted light as well as a machine-testable layer with at least one machine-testable feature, in which corrosion problems are avoided and those mentioned above Disadvantages eliminated or at least reduced.
Diese Aufgabe wird durch die Sicherheitselemente mit den Merkmalen gemäß den Ansprüchen 1 und 9 gelöst. Verfahren zur Herstellung derartiger Sicherheitselemente sowie ein Sicherheitspapier und ein Wertdokument mit solchen Sicherheitselementen sind in den nebengeordneten Ansprüchen angegeben. Weiterbildungen der Erfindung sind Gegenstand der abhängigen Ansprüche.This object is achieved by the security elements with the features according to
Nach einem ersten Aspekt der vorliegenden Erfindung wird bei einem Sicherheitselement mit der oben genannten Schichtfolge Kunststoffträgerfolie, Metalleffektschicht, maschinell prüfbare Schicht aus Funktionsfarbe, metallische Schicht mit Aussparungen in funktionsfarbefreien Bereichen, zwischen der maschinell prüfbaren Schicht und der metallischen Schicht eine Lackschicht aufgetragen. Das Sicherheitselement kann folgendermaßen hergestellt werden:According to a first aspect of the present invention, in a security element with the above-mentioned layer sequence, plastic carrier film, Metal effect layer, machine-testable layer of functional ink, metallic layer with recesses in function-color-free areas, between the machine-testable layer and the metallic layer, a paint layer applied. The security element can be created as follows:
Eine möglichst lichtdurchlässige, transparente oder zumindest transluzente Trägerfolie, beispielsweise eine Polyesterfolie, bevorzugt eine PET-Folie, wird mit einer Metalleffekt-Zusammensetzung, d. h. einer metallpigmenthaltigen Farbe oder einer Metallimitationsfarbe, bedruckt, wobei zumindest die Teilbereiche der Folie, die später die Aussparungen aufweisen sollen, frei bleiben müssen (Freibereiche der Metalleffektschicht). Auf die Metalleffektschicht wird registerhaltig eine maschinell prüfbare Schicht, insbesondere eine Zusammensetzung mit mindestens einem maschinell prüfbaren Stoff, z. B. Magnetlack und/oder Leitlack, aufgedruckt, wobei die bedruckte Fläche nicht größer als die mit der Metalleffekt-Zusammensetzung bedruckte Fläche sein darf, damit die maschinell prüfbare Schicht, von der entgegengesetzten Seite her betrachtet, nicht sichtbar ist. Darauf wiederum wird eine Lackschicht gedruckt. Ein farbloser Lack kann vollflächig aufgedruckt werden, ein eingefärbter Lack muss so aufgedruckt werden, dass er unsichtbar bleibt, wenn das Sicherheitselement von der entgegengesetzten Seite her betrachtet wird.A translucent, transparent or at least translucent carrier film which is as transparent as possible, for example a polyester film, preferably a PET film, is coated with a metallic effect composition, i. H. a metal pigment-containing paint or a Metallimitationsfarbe, printed, wherein at least the portions of the film, which are to have the recesses later, must remain free (open areas of the metallic effect layer). In register, a mechanically testable layer, in particular a composition with at least one machine-testable substance, eg. As magnetic paint and / or conductive ink, printed, the printed area must not be greater than the area printed with the metallic effect composition surface, so that the machine-testable layer, viewed from the opposite side, is not visible. Then, in turn, a lacquer layer is printed. A colorless paint can be printed over the entire surface, a dyed paint must be printed so that it remains invisible when the security element is viewed from the opposite side.
Auf die freien Bereiche der Trägerfolie oder gegebenenfalls auf die nur mit der Lackschicht bedruckten Bereiche der Trägerfolie wird eine ablösbare Druckfarbe in Form von Zeichen, Mustern oder Codierungen aufgedruckt. Die Reihenfolge der Druckvorgänge ist dabei nicht wesentlich. Es kann auch zuerst die ablösbare Druckfarbe gedruckt werden und dann die übrigen Schichten, wobei jedoch möglichst die ablösbare Druckfarbe nicht von der Schutzlackschicht überdruckt werden sollte. Geeignete ablösbare Druckfarben und Verfahren zur Ablösung sind beispielsweise in der
Auf das Sicherheitselement werden vorzugsweise weitere schützende und/oder die Aufbringung auf bzw. die Einbringung in ein Papier erleichternde Schichten aufgebracht. Geeignete Schichten werden im Zusammenhang mit
Bei Verwendung der bevorzugten löslichen Farbe gemäß der
Die Lackschicht zwischen der maschinell prüfbaren Schicht und der Metallschicht verhindert derartige Korrosionserscheinungen zuverlässig. Außerdem weist sie gegenüber der bisher verwendeten Metalleffektschicht eine Reihe von weiteren Vorteilen auf.The lacquer layer between the machine-testable layer and the metal layer reliably prevents such corrosion phenomena. In addition, it has a number of other advantages over the metallic effect layer used hitherto.
Die Lacke enthalten im Gegensatz zu den Metalleffekt-Zusammensetzungen keine festen Partikel und sind daher problemlos zu verdrucken. Schwierigkeiten bei der Steuerung eines registerhaltigen Drucks treten nicht oder nur in geringem Umfang auf und der Ausschuss reduziert sich merklich. Außerdem sind die Standzeiten von Zylindern und Rakeln sehr hoch.In contrast to the metallic effect compositions, the lacquers contain no solid particles and are therefore easy to print. Difficulties in controlling a register-containing pressure do not occur or only to a small extent and the rejects are noticeably reduced. In addition, the service life of cylinders and squeegees are very high.
Für einen Lack können andere Lösungsmittel verwendet werden als für eine Metalleffekt-Zusammensetzung, beispielsweise Ethanol anstelle von Ethylacetat. Die Trocknung des Lacks wird dadurch wesentlich einfacher, da ein Wegschlagen des Lösungsmittels in eine andere Schicht vermieden werden kann. Auch die sich aus der schwierigen Trocknung ergebenden Folgeprobleme werden vermieden.For a paint, other solvents may be used than for a metallic effect composition, for example, ethanol instead of ethyl acetate. The drying of the paint is thereby much easier, since a displacement of the solvent are avoided in another layer can. Also resulting from the difficult drying resulting problems are avoided.
Bei einer ausreichenden Auftragsmenge des Lacks füllt dieser die raue Oberfläche der maschinell prüfbaren Schicht aus z. B. Magnetlack und/oder Leitlack weitgehend auf, so dass eine relativ glatte Oberfläche erhalten wird. Wird auf diese Oberfläche nun eine metallische Schicht aufgedampft, erscheint auch die metallische Schicht relativ glatt, was bedeutet, dass das optische Erscheinungsbild der Vorder- und Rückseite des Sicherheitselements nach der Metallisierung homogener ist, dass sich die optische Zweiseitigkeit des Sicherheitselements also verringert.With a sufficient order amount of paint this fills the rough surface of the machine-testable layer of z. B. magnetic paint and / or conductive ink largely on, so that a relatively smooth surface is obtained. If a metallic layer is vapor-deposited on this surface, the metallic layer also appears to be relatively smooth, which means that the optical appearance of the front and back of the security element after homogenization is more homogeneous, thus reducing the optical two-sidedness of the security element.
Die durch die Beschichtung mit Lack erzielte glattere Oberfläche hat noch weitere Vorteile. So wird die Gefahr des Bruches der aufgedampften metallischen Beschichtung bei mechanischer Beanspruchung, beispielsweise beim Demetallisieren, verringert. Die elektrische Leitfähigkeit des Sicherheitselements ist damit gegenüber Umlaufbedingungen besser geschützt. Im Übrigen wird durch die glattere Oberfläche der abgedeckten maschinell prüfbaren Schicht auch die Demetallisierung im Waschverfahren einfacher.The smoother surface achieved by coating with paint has even more advantages. Thus, the risk of breakage of the vapor-deposited metallic coating under mechanical stress, for example when demetallizing, is reduced. The electrical conductivity of the security element is thus better protected against circulation conditions. Incidentally, the smoother surface of the covered machine-testable layer also simplifies the demetallization in the washing process.
Ein weiterer Vorteil sind die geringen Kosten eines Lacks gegenüber einer metallpigmenthaltigen Druckfarbe bzw. einer Metallimitationsfarbe. Zu Buche schlagen auch die verringerten Werkzeugkosten aufgrund fehlender Abrasivität eines Schutzlacks. Zudem schützt der Lack den Schichtaufbau gegen chemische Angriffe. Dafür ist ein geeigneter chemisch resistenter Lack zu wählen. Als Beispiele geeigneter Lacke sind chemisch resistente und transparente Lacke auf Nitrocellulosebasis, Polyamid-, PVC-Basis oder auch vernetzende, transparente Lacke, beispielsweise isocyanatvernetzende Polyurethane zu nennen.Another advantage is the low cost of a paint compared to a metal pigment-containing ink or a Metallimitationsfarbe. The reduced tool costs due to the lack of abrasion of a protective varnish also make a book. In addition, the paint protects the layer structure against chemical attack. For this, a suitable chemically resistant lacquer must be chosen. Examples of suitable lacquers are chemically resistant and transparent nitrocellulose-based lacquers, polyamide, PVC-based or else crosslinking, transparent lacquers, for example isocyanate-crosslinking polyurethanes.
Neben den zahlreichen Vorteilen weist die oben beschriebene Ausführungsform auch einige Nachteile auf, die sie mit dem Stand der Technik gemeinsam hat und die unter anderem damit zusammenhängen, dass die metallische Schicht, in der die Aussparungen ausgebildet werden, als letzte Schicht der Schichtfolge Metalleffektschicht, maschinell prüfbare Schicht, metallische Schicht, aufgetragen wird.In addition to the numerous advantages, the embodiment described above also has some disadvantages that it has in common with the prior art and that inter alia related to the fact that the metallic layer in which the recesses are formed as the last layer of the layer sequence metallic effect layer, machine testable layer, metallic layer, is applied.
Die Metalleffektschicht und die maschinell prüfbare Schicht bauen relativ stark auf. Aus wickeltechnischen Gründen ist daher die Rollenlänge vor dem Aufbringen der metallischen Schicht beschränkt. Außerdem können wegen der hohen Abrasivität des Magnetlacks/ des Leitlacks nur relativ kurze Bahnen bedruckt werden. Die Vakuumaufdampfung der metallischen Schicht findet deshalb an Rollen relativ kleiner Länge statt, so dass relativ zur Rollenlänge der beim Anfahren und Stoppen produzierte Ausschuss entsprechend hoch ist.The metallic effect layer and the machine-testable layer build up relatively strongly. For winding technical reasons, therefore, the roll length is limited before the application of the metallic layer. In addition, only relatively short webs can be printed because of the high abrasiveness of the magnetic paint / conductive ink. The vacuum deposition of the metallic layer therefore takes place on rollers of relatively small length, so that relative to the roll length of the produced at startup and stop Committee is correspondingly high.
Zudem ist die Oberfläche, auf die die metallische Schicht aufgedampft wird, relativ uneben, da die Metalleffektschicht und die darauf aufgebrachte maschinell prüfbare Schicht erhabene Bereiche mit tiefer liegenden Bereichen dazwischen bilden. Die metallische Schicht bedeckt Erhebungen und Senken gleichermaßen. Bei bestimmten geometrischen Anordnungen der maschinell prüfbaren Schicht, beispielsweise in Form von Blöcken von Funktionsfarben, wie Magnetlack-Blöcken, kann eine Demetallisierung zwischen den Funktionsfarbe-Blöcken schwierig werden. Es kann zu unsauberem Auswaschen und unpräzisen Aussparungen kommen. Unerwünschte Auswaschungen beim Demetallisieren können auch durch eine sogenannte Tonung des Bindemittels, zu der es beim Drucken von Magnetlack/Leitlack immer wieder kommt, entstehen. Der Begriff "Tonung" bezeichnet hierbei das Phänomen, dass beim Tiefdruck an der Oberfläche des Tiefdruckzylinders ein mehr oder weniger dünner Bindemittelfilm verbleibt, der zu Rakelstreifen im Druckbild führen kann.In addition, the surface to which the metallic layer is vapor-deposited is relatively uneven, because the metallic effect layer and the machine-testable layer deposited thereon form raised areas with deeper areas therebetween. The metallic layer covers elevations and depressions alike. In certain geometrical arrangements of the machine-testable layer, for example in the form of blocks of functional colors, such as magnetic-lacquer blocks, demetallization between the functional-color blocks may become difficult. It can lead to unclean washout and imprecise recesses. Unwanted washouts during demetallization can also be caused by a so-called toning of the binder, which occurs again and again when printing magnetic paint / conductive ink. The term "toning" here refers to the phenomenon that when gravure on the surface of the gravure cylinder, a more or less thin binder film remains, which can lead to doctor blade in the printed image.
Die unebene Oberfläche kann auch dazu führen, dass bei bestimmten geometrischen Anordnungen der maschinell prüfbaren Schicht, beispielsweise in Form von Funktionsfarbe-Blöcken, wie Magnetlack-Blöcken, die dünne, aufgedampfte Metallschicht beim Demetallisieren mechanisch so stark belastet wird, dass sie reißt, und die vorher gegebene Leitfähigkeit unterbrochen wird. Für Sicherheitselemente mit geforderter Leitfähigkeit ist es daher erforderlich, zusätzlich eine gedruckte Leitlackschicht vorzusehen.The uneven surface can also lead to the fact that in certain geometrical arrangements of the machine-testable layer, for example in the form of functional color blocks, such as magnetic paint blocks, the thin, vapor-deposited metal layer is mechanically stressed during demetallization so that it breaks, and the previously given conductivity is interrupted. For security elements with required conductivity, it is therefore necessary to additionally provide a printed conductive ink layer.
Eine weitere Folge der unebenen Oberfläche, auf die die Metallschicht aufgedampft wird, ist, dass von der Metallseite her die unterschiedlichen Bereiche (mit bzw. ohne Magnetlack und/ oder Leitlack) des Sicherheitselements oftmals erkennbar sind. Auch von der Rückseite her sind diese Bereiche identifizierbar, da die Metalleffektfarbe nicht völlig äquivalent zur aufgedampften Metallschicht ist.Another consequence of the uneven surface on which the metal layer is vapor-deposited is that the different areas (with and without magnetic paint and / or conductive ink) of the security element are often recognizable from the metal side. These areas can also be identified from the rear, since the metallic effect color is not completely equivalent to the vapor-deposited metal layer.
Gemäß einem zweiten Aspekt der vorliegenden Erfindung werden diese Probleme durch eine Änderung der Schichtfolge des Sicherheitselements und eine damit einhergehende Änderung des Verfahrensablaufs zur Herstellung des Sicherheitselements gelöst.According to a second aspect of the present invention, these problems are solved by a change in the layer sequence of the security element and a concomitant change in the procedure for producing the security element.
Das Sicherheitselement gemäß dem zweiten Erfindungsaspekt weist folgende Schichtfolge auf: transparente oder zumindest transluzente Kunststofffolie, metallische Schicht mit Aussparungen in Form von Zeichen, Mustern oder Codierungen in funktionsfarbefreien Bereichen, Schutzlackschicht oder Primer- bzw. Haftvermittlerschicht, maschinell prüfbare Schicht aus Funktionsfarbe (z. B. Magnetlack/Leitlack), Metallisierungsschicht, d.h. für den Betrachter metallisch erscheinende Schicht. Die für den Betrachter metallisch erscheinende Schicht wird zweckmäßig durch eine Metalleffektschicht oder eine metallische Schicht bereitgestellt.The security element according to the second aspect of the invention has the following layer sequence: transparent or at least translucent plastic film, metallic layer with recesses in the form of characters, patterns or codes in functional color-free areas, protective lacquer layer or primer or primer layer, machine-testable layer of functional ink (eg Magnetic lacquer / Leitlack), Metallisierungsschicht, ie for the Viewer metallic appearing layer. The layer that appears metallic to the viewer is expediently provided by a metallic effect layer or a metallic layer.
Zur Erzeugung dieser Schichtfolge wird zuerst eine ablösbare Druckfarbe in Form der zu bildenden Aussparungen, d. h. mit dem gewünschten Demetallisierungsmotiv, auf eine transparente oder zumindest transluzente Trägerfolie aufgedruckt. Anschließend wird die bedruckte Trägerfolie mit einer metallischen Schicht, beispielsweise aus Aluminium oder einem anderen Metall, versehen; bevorzugt wird das Metall im Vakuum aufgedampft. Dann wird die Trägerfolie demetallisiert, d. h. in den mit der Druckfarbe bedruckten Bereichen wird die ablösbare Druckfarbe zusammen mit dem darauf aufgebrachten Metall entfernt. Das Demetallisierungsverfahren richtet sich dabei nach der verwendeten ablösbaren Druckfarbe. Es kann gegebenenfalls mechanisch unterstützt werden. Auf die metallische Schicht wird nun vollflächig eine transparente oder zumindest transluzente Haftvermittlerschicht oder Schutzlackschicht aufgedruckt. Die Haftvermittler- bzw. Schutzlackschicht schützt gegen die Bildung eines galvanischen Elements zwischen der metallischen Schicht und der nachfolgenden maschinell prüfbaren Schicht. Je nach Art des Lacks kann sie auch die Hafteigenschaften zwischen der metallischen Schicht und der maschinell prüfbaren Schicht verbessern (Haftvermittler) und/ oder die chemische und/ oder mechanische Beständigkeit des Sicherheitselementverbunds erhöhen. Als Beispiele geeigneter Lacke sind Lacke auf Nitrocellulosebasis, PVC-Basis, Polyamidbasis oder vernetzende Lacke, insbesondere isocyanatvernetzende Polyurethane, zu nennen. Auf die Haftvermittler- bzw. Schutzlackschicht werden nun weitere Schichten in Folge im sogenannten Insetter-Verfahren im Register zum demetallisierten Motiv aufgedruckt, d. h. das demetallisierte Motiv wird nicht verdeckt.In order to produce this layer sequence, first a releasable printing ink in the form of the recesses to be formed, ie with the desired demetallizing motif, is printed on a transparent or at least translucent carrier film. Subsequently, the printed carrier film is provided with a metallic layer, for example of aluminum or another metal; Preferably, the metal is evaporated in vacuo. Then, the carrier film is demetallized, ie in the areas printed with the ink, the releasable ink is removed together with the metal deposited thereon. The demetallization process depends on the removable printing ink used. It may optionally be mechanically supported. On the metallic layer, a transparent or at least translucent adhesive layer or protective lacquer layer is now printed over the entire surface. The primer layer protects against the formation of a galvanic element between the metallic layer and the subsequent machine-testable layer. Depending on the type of paint, it can also improve the adhesive properties between the metallic layer and the machine-testable layer (adhesion promoter) and / or increase the chemical and / or mechanical resistance of the security element compound. Examples of suitable lacquers are lacquers based on nitrocellulose, PVC-based, polyamide-based or crosslinking lacquers, in particular isocyanate-crosslinking polyurethanes. On the primer or protective coating now more layers are printed in sequence in the so-called insetter process in the register for demetallisierten motif, ie the demetallized motif is not obscured.
Als Erstes wird die maschinell prüfbare Schicht, z. B. aus Magnetlack und/ oder Leitlack, aufgedruckt und darauf folgt eine metallisch erscheinende Schicht, z. B. eine Schicht aus Metalleffektfarbe, wie eine metallpigmenthaltige Druckfarbe. Die Metalleffektfarbe bedeckt die maschinell prüfbare Schicht, die nun von keiner Seite des Sicherheitselements her mehr sichtbar ist. Die maschinell prüfbare Schicht wird zweckmäßig aus einer Zusammensetzung gebildet, die mindestens einen maschinell prüfbaren Stoff enthält.First, the machine testable layer, z. B. of magnetic paint and / or conductive ink, printed on and followed by a seemingly metallic layer, for. B. a layer of metallic effect paint, such as a metal pigment-containing printing ink. The metallic effect color covers the machine-testable layer, which is now no longer visible from any side of the security element. The machine-testable layer is expediently formed from a composition containing at least one machine-testable substance.
Die für diesen Erfindungsaspekt zu verwendenden Materialien, wie Kunststofffolie, Metalle, Schutzlacke, Magnetlacke, Leitlacke, Metalleffektfarben, ablösbare Druckfarben (und Verfahren zur Ablösung) etc., sind dieselben wie bei dem zuerst genannten Erfindungsaspekt.The materials to be used for this aspect of the invention, such as plastic film, metals, conformal lacquers, magnetic paints, conductive inks, metallic effect paints, peelable inks (and peeling methods), etc., are the same as in the first aspect of the invention.
Diese Ausführungsform weist die Vorteile der zuerst genannten Ausführungsform auf sowie zusätzliche Vorteile. Insbesondere ist aufgrund der ebenen Oberfläche, auf der sich die Metallschicht befindet, die mechanische Belastung beim Demetallisieren gering, wodurch die Gefahr einer Unterbrechung der elektrischen Leitfähigkeit wesentlich verringert ist. Der Druck von (zusätzlichen) Leitlackspuren kann deshalb entfallen. Die ebene Oberfläche ermöglicht auch eine präzisere, konturenscharfe Demetallisierung ohne unsaubere Auswaschungen. Da die Demetallisierung vor dem Drucken der Funktionsfarbe stattfindet, bleibt eine eventuelle Tonung der Funktionsfarben auch ohne Einfluss auf die Demetallisierung.This embodiment has the advantages of the first-mentioned embodiment as well as additional advantages. In particular, due to the flat surface on which the metal layer is located, the mechanical stress during demetallization is low, whereby the risk of interruption of the electrical conductivity is substantially reduced. The pressure of (additional) Leitlackspuren can therefore be omitted. The flat surface also allows a more precise, contour-sharp demetallization without dirty washouts. Since the demetallization takes place prior to printing the function color, any toning of the function colors also has no influence on the demetallization.
Beim Aufbringen der Metallschicht befinden sich noch keine auftragenden Schichten auf der Trägerfolie. Daher ist eine Vakuum-Metallisierung großer Rollenlängen möglich. Der beim Anfahren und Beenden unvermeidbare Ausschuss ist deshalb, relativ zur Rollenlänge, nur klein.When applying the metal layer, there are still no depositing layers on the carrier film. Therefore, a vacuum metallization of large roll lengths is possible. The unavoidable at startup and termination Committee is therefore, relative to the roll length, only small.
Die innen liegenden Schichten werden optisch sehr gut kaschiert. Durch die vollflächig auf die Trägerfolie aufgebrachte metallische Beschichtung entspricht das Erscheinungsbild dieser Seite des Sicherheitselements einem Sicherheitselement, das lediglich eine metallische Schicht mit Aussparungen aufweist. Bei einer seitenrichtigen Aufbringung des Sicherheitselements auf ein Sicherheitspapier sind die weiteren Schichten und insbesondere die maschinell prüfbare Schicht nicht zu erkennen. Wenn das Sicherheitselement auf der Rückseite des Papiers nicht sichtbar sein soll, kann das Sicherheitselement an seiner Rückseite zusätzlich mit einer Deckweißschicht bedruckt werden. Dieser Deckweißdruck kann auch gleichzeitig zur Online-Überprüfung der seitenrichtigen Einbringung auf der Papiermaschine genutzt werden.The inner layers are optically laminated very well. As a result of the metallic coating applied to the carrier film over the entire surface, the appearance of this side of the security element corresponds to a security element which has only one metallic layer with recesses. When the security element is applied to a security paper in the correct direction, the further layers and in particular the machine-testable layer can not be recognized. If the security element is not to be visible on the back of the paper, the security element on its back side can be additionally printed with an opaque white layer. This opaque white print can also be used at the same time for online checking of the page-correct insertion on the paper machine.
Gemäß einer weiteren Ausführungsform dieses Aspekts der Erfindung kann zwischen der Schicht aus Metalleffektfarbe und der maschinell prüfbaren Schicht eine zweite transparente oder zumindest transluzente Schutzlackschicht vollflächig vorgesehen werden. Bevorzugt wird diese Schicht aufgedruckt.According to a further embodiment of this aspect of the invention, a second transparent or at least translucent protective lacquer layer can be provided over the entire surface between the layer of metallic effect ink and the machine-testable layer. Preferably, this layer is printed.
Durch die zweite Schutzlackschicht ergibt sich der zusätzliche Vorteil, dass die raue, körnige Oberfläche der maschinell prüfbaren Schicht eingeebnet wird und auf der glatteren Oberfläche der maschinell prüfbaren Schicht ergibt die Metalleffektfarbe ein optisch homogeneres Druckbild. Die optische Zweiseitigkeit des Sicherheitselements wird daher verringert.The second layer of protective lacquer provides the additional advantage that the rough, granular surface of the machine-testable layer is leveled, and on the smoother surface of the machine-testable layer, the metallic effect color results in a more optically homogeneous printed image. The optical two-sidedness of the security element is therefore reduced.
Anstelle der Schicht aus Metalleffektfarbe kann als metallisch erscheinende Schicht auch eine zweite metallische Schicht verwendet werden. Wie die Schicht aus Metalleffektfarbe wird auch die zweite metallische Schicht bevorzugt im Wesentlichen nur in den Bereichen, in denen die maschinell prüfbare Schicht aufgedruckt ist, vorgesehen, damit die Aussparungen in der auf die Trägerfolie aufgebrachten, ersten metallischen Schicht gut sichtbar bleiben. Zur Verhinderung der Bildung eines galvanischen Elements zwischen der maschinell prüfbaren Schicht und der zweiten metallischen Schicht wird zwischen diesen Schichten eine zweite Schutzlackschicht vollflächig aufgedruckt. Um die Sichtbarkeit der Aussparungen nicht zu behindern, muss die zweite Schutzlackschicht transparent oder zumindest transluzent sein.Instead of the layer of metallic effect color, a second metallic layer can also be used as the layer appearing to be metallic. Like the layer of metallic effect ink, the second metallic layer is preferably substantially only in the areas in which the machine testable Layer is provided, provided so that the recesses remain well visible in the applied to the carrier film, the first metallic layer. To prevent the formation of a galvanic element between the machine-testable layer and the second metallic layer, a second protective lacquer layer is printed over the entire area between these layers. In order not to hinder the visibility of the recesses, the second layer of protective lacquer must be transparent or at least translucent.
Zur Herstellung eines derartigen Sicherheitselements wird nach dem Aufdrucken der maschinell prüfbaren Schicht vollflächig die zweite Schutzlackschicht aufgedruckt und dann auf die Bereiche, die später nicht mit einer metallischen Schicht bedeckt sein sollen, eine ablösbare Druckfarbe aufgedruckt. Zumindest der Bereich der Aussparungen in der ersten metallischen Schicht ist mit der ablösbaren Druckfarbe zu bedrucken. Danach wird die zweite metallische Schicht aufgedampft und anschließend mit einem geeigneten Demetallisierungsverfahren, je nach verwendeter ablösbarer Druckfarbe, in den mit ablösbarer Druckfarbe bedruckten Bereichen demetallisiert.In order to produce such a security element, after the machine-testable layer has been printed on, the second protective lacquer layer is printed over the whole area and then printed on the areas which are not to be covered with a metallic layer later on, a removable printing ink. At least the area of the recesses in the first metallic layer is to be printed with the removable printing ink. Thereafter, the second metallic layer is evaporated and then demetallized with a suitable demetallization process, depending on the used Ablösbarer printing ink in the releasable ink printed areas.
Die Abdeckung durch die zweite metallische Schicht hat den Vorteil, dass sie die Sichtbarkeit der Magnetlack- bzw. Leitlack-Blöcke stark reduziert, da die optischen Eigenschaften durch die Metallschicht vorgegeben werden. Es bleibt lediglich die Sichtbarkeit durch eine gewisse Rauigkeit der abgedeckten Schichten, vor allem beim Magnetlack-Druck, die jedoch bereits durch den Schutzlack gut ausgeglichen wird. Sie kann noch weiter verringert werden, indem die maschinell prüfbare Schicht zusätzlich mit Metalleffektfarbe bedruckt wird und die zweite Schutzlackschicht auf der Schicht aus Metalleffektfarbe vorgesehen wird.The cover by the second metallic layer has the advantage that it greatly reduces the visibility of the magnetic paint or Leitlack blocks, since the optical properties are dictated by the metal layer. It remains only the visibility by a certain roughness of the covered layers, especially in the magnetic paint printing, which is already well balanced by the protective coating. It can be even further reduced by additionally printing the machine-testable layer with metallic effect ink and providing the second protective lacquer layer on the layer of metallic effect ink.
Auch Kombinationen der vorstehend erläuterten Ausführungsformen sind möglich.Combinations of the above-described embodiments are possible.
Zum besseren Schutz des Schichtaufbaus des Sicherheitselements kann bei allen Ausführungsformen die metallisch erscheinende Schicht (Metalleffektschicht oder metallische Schicht) mit einer zusätzlichen abdeckenden Schicht aus Schutzlack bedruckt werden.For better protection of the layer structure of the security element in all embodiments, the metallic appearing layer (metallic effect layer or metallic layer) can be printed with an additional covering layer of protective lacquer.
Weitere Ausführungsbeispiele sowie Vorteile der Erfindung werden im Folgenden anhand der Figuren, die erläuternd, aber nicht beschränkend zu verstehen sind, genauer beschrieben. Zur besseren Anschaulichkeit wird in den Figuren auf eine maßstabs- und proportionsgetreue Darstellung verzichtet.Further embodiments and advantages of the invention will be described in more detail below with reference to the figures, which are to be understood as illustrative but not restrictive. For better clarity, a scale and proportioned representation is omitted in the figures.
Es zeigen:
- Fig. 1
- eine schematische Darstellung eines Wertdokuments mit einem erfindungsgemäßen Sicherheitselement,
- Fig. 2
- ein erfindungsgemäßes Sicherheitselement in Aufsicht,
- Fig. 3, 4
- einen Schichtaufbau eines Sicherheitselements nach einem Ausführungsbeispiel der Erfindung entlang Schnitt A-A in
Fig. 2 in verschiedenen Herstellungsstadien, - Fig. 5
- einen Schichtaufbau eines erfindungsgemäßen Sicherheitselements wie in
Fig. 3 ,4 entlang Schnitt A-A inFig. 2 bei der Herstellung als Rollenware, - Fig. 6-8
- einen Schichtaufbau eines Sicherheitselements nach einem anderen Ausführungsbeispiel der Erfindung entlang Schnitt A-A in
Fig. 2 in verschiedenen Herstellungsstadien, - Fig. 9 - 10
- einen Schichtaufbau eines Sicherheitselements nach einem weiteren Ausführungsbeispiel der Erfindung entlang Schnitt A-A in
Fig. 2 in verschiedenen Herstellungsstadien, und - Fig. 11
- einen typischen Schichtaufbau eines erfindungsgemäßen Sicherheitselements.
- Fig. 1
- a schematic representation of a value document with a security element according to the invention,
- Fig. 2
- an inventive security element in supervision,
- Fig. 3, 4
- a layer structure of a security element according to an embodiment of the invention along section AA in
Fig. 2 in different stages of production, - Fig. 5
- a layer structure of a security element according to the invention as in
Fig. 3 .4 along section AA inFig. 2 in the production as roll goods, - Fig. 6-8
- a layer structure of a security element according to another embodiment of the invention along section AA in
Fig. 2 in different stages of production, - Fig. 9 - 10
- a layer structure of a security element according to a further embodiment of the invention along section AA in
Fig. 2 in different stages of production, and - Fig. 11
- a typical layer structure of a security element according to the invention.
Die
Die
An der anderen Seite des Sicherheitselements 2 wird die Magnetschicht 5 von einer aufgedruckten Metalleffektschicht 4 abgedeckt. Die Metalleffektschicht 4 wird entweder unmittelbar auf die maschinell prüfbare Schicht 5 aufgedruckt oder es wird zuerst eine zweite Schutzlackschicht 11 vollflächig auf den gesamten Schichtaufbau aufgedruckt, wie in
Anstelle der in
Bei dem in den
Sicherheitselemente, wie beispielsweise Sicherheitsfäden oder Sicherheitsbänder, weisen typischerweise weitere Schichten auf, die dem Schutz gegen chemische und/oder mechanische Einwirkungen dienen und/oder die Aufoder Einbringbarkeit des Sicherheitselements auf bzw. in ein Sicherheitspapier fördern. Ein geeigneter Schichtaufbau ist in
Die erfindungsgemäßen Sicherheitselemente können jede beliebige Form aufweisen. Die gängigsten Formen sind Sicherheitsfäden und Sicherheitsbänder. In diesen Sicherheitselementen können die maschinell prüfbaren Bereiche und die Bereiche mit z. B. in Form einer Negativschrift vorliegenden Aussparungen geometrisch unterschiedlich angeordnet sein, beispielsweise in Laufrichtung eines Sicherheitsfadens alternierend oder jeweils parallel in Laufrichtung des Fadens. Die maschinell prüfbare Schicht kann so ausgebildet werden, dass sie eine Codierung bildet. Hinsichtlich möglicher Anordnungen einer Negativschrift in Kombination mit einer maschinell prüfbaren Schicht und insbesondere hinsichtlich möglicher Arten und Anordnungen magnetischer Codierungen in Kombination mit einer Negativschrift, wird auf die
Die vorstehend aufgeführten Schichtaufbauten sind für alle Sicherheitselemente mit spezifizierten Magnet- und Leitfähigkeitseigenschaften, insbesondere für entsprechende Sicherheitsfäden und Sicherheitsbänder, geeignet. Hierzu gehören beispielsweise Magnetfäden mit und ohne spezifizierte Leitfähigkeit, magnetcodierte Fäden mit und ohne elektrische Leitfähigkeit, Hologrammfäden mit Aussparungen, und Magnetpisten oder Magnetcodes mit und ohne elektrische Leitfähigkeit sowie Fäden mit Aussparungen, und Magnetpisten oder Magnetcodes mit und ohne elektrische Leitfähigkeit, die zusätzlich einen Farbkippeffekt beispielsweise aufgrund von Interferenzeffekten zeigen.The layer structures listed above are suitable for all security elements with specified magnetic and conductive properties, in particular for corresponding security threads and security tapes. These include, for example, magnetic filaments with and without specified conductivity, magnetically coded filaments with and without electrical conductivity, hologram filaments with recesses, and magnetic tracks or magnetic codes with and without electrical conductivity and filaments with recesses, and magnetic tracks or magnetic codes with and without electrical conductivity, which additionally has a color shift effect for example due to interference effects.
Claims (34)
- A security element (2) for a security paper or a value document (1), such as a banknote, an identification card or the like, having characters, patterns or codings that are visually recognizable at least in transmitted light, comprising- a transparent or at least translucent plastic layer (3),- a first metallic layer (7) having gaps (9) in the form of the characters, patterns or codings,- a machine-verifiable layer (5) having free regions,- a layer appearing to be metallic to the viewer having free regions,which are arranged above each other in the stated order, wherein the free regions of the machine-verifiable layer (5) and of the layer appearing to be metallic are so dimensioned and arranged that the visual recognizability of the gaps (9) of the first metallic layer is ensured,
characterized in that between the first metallic layer (7) and the machine-verifiable layer (5) there is provided over the full area a transparent or at least translucent adhesion promoter layer or first protective lacquer layer (10). - The security element (2) according to claim 1, characterized in that the layer appearing to be metallic is a metallic effect layer (4).
- The security element (2) according to claim 2, characterized in that between the machine-verifiable layer (5) and the metallic effect layer (4) there is provided over the full area a second transparent or at least translucent protective lacquer layer (11).
- The security element (2) according to claim 1, characterized in that the layer appearing to be metallic is formed by a second metallic layer (12), and that between the machine-verifiable layer (5) and the second metallic layer (12) there is provided over the full area the full area a transparent or at least translucent second protective lacquer layer (11).
- The security element (2) according to claim 4, characterized in that between the machine-verifiable layer (5) and the transparent or at least translucent second protective lacquer layer (11) there is provided a metallic effect layer (4) with free regions which are so dimensioned and arranged that the visual recognizability of the gaps (9) of the first metallic layer (7) is ensured.
- The security element (2) according to any of the claims 1 to 5, characterized in that on the layer structure there is provided over the full area the full area a transparent or at least translucent third protective lacquer layer (13).
- The security element (2) according to any of the claims 1 to 6, characterized in that the security element (2) is equipped with an opaque white layer (16) on the side facing away from the first metallic layer (7).
- The security element (2) according to any of the claims 1 to 7, characterized in that the first (10) and/or the second (11) and/or the third (13) protective lacquer layer consists of a lacquer on a nitrocellulose basis, PVC basis, polyamide basis or of a crosslinking lacquer.
- A security element (2) for a security paper or a value document (1) such as a banknote, an identification card or the like, having characters, patterns or codings that are visually recognizable at least in transmitted light, comprising- a transparent or at least translucent plastic layer (3),- a metallic effect layer (4) having free regions,- a machine-verifiable layer (5) having free regions,- a metallic layer (7) having gaps (9) in the form of characters, patterns or codings,which are arranged above each other in the stated order, wherein the free regions of the metallic effect layer (4) and of the machine-verifiable layer (5) are so dimensioned and arranged that the visual recognizability of the gaps (9) of the metallic layer (7) is ensured,
characterized in that between the machine-verifiable layer (5) and the metallic layer (7) there is provided a lacquer layer (6) which does not impair the visual recognizability of the gaps (9) of the metallic layer (7). - The security element (2) according to claim 9, characterized in that the lacquer layer (6) is transparent or translucent and provided at least regionally.
- The security element (2) according to claim 9, characterized in that the lacquer layer (6) is colored and has free regions that are so dimensioned and arranged that the visual recognizability of the gaps (9) of the metallic layer (7) is ensured.
- The security element (2) according to any of the claims 9 to 11, characterized in that the lacquer layer (6) consists of a lacquer on a nitrocellulose basis, PVC basis, polyamide basis or of a crosslinking lacquer.
- The security element (2) according to any of the claims 1 to 12, characterized in that the machine-verifiable layer (5) forms a code.
- The security element (2) according to any of the claims 1 to 13, characterized in that the machine-verifiable layer (5) comprises a composition having at least one machine-verifiable substance.
- The security element (2) according to any of the claims 1 to 14, characterized in that the security element (2) has further layers for protection against chemical and/or mechanical influences and/or for promoting the capability of being applied to or incorporated in paper.
- The security element (2) according to any of the claims 1 to 15, characterized in that the security element (2) is a security thread or a security band.
- A value document (1) or security paper for manufacturing a value document (1), such as a banknote, an identification card or the like, characterized in that the value document (1) or security paper is equipped with at least one security element (2) according to at least one of the claims 1 to 16.
- The value document (1) or security paper for manufacturing a value document (1) according to claim 17, characterized in that the security element (2) is at least partially embedded in the material of the value document (1) or security paper.
- The value document (1) or security paper for manufacturing a value document (1) according to claim 17, characterized in that the security element (2) is arranged on the surface of the value document (1) or security paper.
- A method for manufacturing a security element (2) according to any of the claims 1 to 8, characterized by the following steps of:- applying a removable printing ink (8) in the form of the characters, patters or codings which are to be visually recognizable at least in transmitted light as gaps (9) in the finished security element (2) to partial regions of a transparent or at least translucent carrier foil (3),- applying over the full area a metallic layer (7) to the transparent or at least translucent carrier foil (3),- demetalizing the metallic layer (7) by removing the removable printing ink (8) and the regions of the metallic layer (7) applied to the removable printing ink (8),- applying over the full area a transparent or at least translucent adhesion promoter layer or first protective lacquer layer (10) to the metallic layer (7),- applying a machine-verifiable layer (5) to partial regions of the adhesion promoter layer or of the first protective lacquer layer (10) in such a fashion that the recognizability of the gaps (9) of the metallic layer (7) is not impaired,- applying a metallic effect layer (4) to the machine-verifiable layer (5) and possibly to partial regions of the adhesion promoter layer or of the first protective lacquer layer (10) in such a fashion that the recognizability of the gaps (9) of the metallic layer (7) is not impaired, and- possibly cutting the security element (2) to a desired size.
- The method according to claim 20, characterized in that between the machine-verifiable layer (5) and the metallic effect layer (4) there is applied over the full area a second transparent or at least translucent protective lacquer layer (11).'
- The method according to claim 20 or 21, characterized in that the removable printing ink (8) is removed by washing out with a liquid, preferably with water.
- The method according to any of the claims 20 to 22, characterized in that on the formed layer structure a third transparent or at least translucent protective lacquer layer (13) is applied over the full area.
- A method for manufacturing a security element (2) according to any of the claims 1 to 8, characterized by the following the steps of:- applying a first removable printing ink (8) in the form of the characters, patters or codings which are to be visually recognizable at least in transmitted light as gaps (9) in the finished security element (2) to partial regions of a transparent or at least translucent carrier foil (3),- applying over the full area a first metallic layer (7) to the transparent or at least translucent carrier foil (3),- demetalizing the first metallic layer (7) by removing the first removable printing ink (8) and the regions of the first metallic layer (7) applied to the first removable printing ink (8),- applying over the full area a transparent or at least translucent adhesion promoter layer or a first protective lacquer layer (10) to the first metallic layer (7),- applying a machine-verifiable layer (5) to partial regions of the adhesion promoter layer or of the first protective lacquer layer (10) in such a fashion that the visual recognizability of the gaps (9) of the first metallic layer (7) is not impaired,- applying over the full area a second transparent or at least translucent lacquer layer (11) to the machine-verifiable layer (5) and to partial regions of the adhesion promoter layer or of the first protective lacquer layer (10),- applying a second removable printing ink (8) in such a fashion that at least the gaps (9) in the first metallic layer (7) are covered by the second removable printing ink (8),- applying over the full area a second metallic layer (12) to the layer structure,- demetalizing the second metallic layer (12) by removing the second removable printing ink (8) and the regions of the second metallic layer (12) applied to the second removable printing ink (8), and- possibly cutting the security element (2) to a desired size.
- The method according to claim 24, characterized in that upon applying the second removable printing ink (8) the regions remain free where the machine-verifiable layer (5) is provided.
- The method according to claim 24 or 25, characterized in that to the machine-verifiable layer (5) a metallic effect layer (4) is applied in register, so that the machine-verifiable layer (5) is covered completely by the metallic effect layer (4).
- The method according to any of the claims 24 to 26, characterized in that to the formed layer structure there is applied over the full area a third transparent or at least translucent protective lacquer layer (13).
- The method according to any of the claims 24 to 27, characterized in that the first and/or the second removable printing ink (8) is removed by washing out with a liquid, preferably with water.
- A method for manufacturing a security element (2) according to any of the claims 9 to 19, characterized by the following steps of:- applying a metallic effect layer (4) to partial regions of a transparent or at least translucent carrier foil (3),- applying in register a machine-verifiable layer (5) to the metallic effect layer (4),- applying a lacquer layer (6) to the machine-verifiable layer (5) and possibly to partial regions of the metallic effect layer (4) and/or of the transparent or at least translucent carrier foil (3),- applying a removable printing ink (8) in the form of the characters, patterns or codings which are to be visually recognizable at least in transmitted light as gaps (9) in the finished security element (2) to partial regions of the carrier foil (3) or of the lacquer layer (6), wherein the removable printing ink (8) is applied in different partial regions of the carrier foil (3) than the metallic effect layer (4),- applying over the full area a metallic layer (7) to the layer structure,- demetalizing the metallic layer (7) by removing the removable printing ink (8) and the regions of the metallic layer (7) applied to the removable printing ink (8), and- possibly cutting the security element (2) to a desired size.
- The method according to claim 29, characterized in that the lacquer layer (6) is colored and is applied in register to the machine-verifiable layer (5) and possibly to partial regions of the metallic effect layer (4).
- The method according to claim 29, characterized in that the lacquer layer (6) is transparent or at least translucent and is applied in register to the machine-verifiable layer (5) and possibly to partial regions of the metallic effect layer (4) and/or of the carrier foil (3) or over the full area to the formed layer structure.
- The method according to any of the claims 29 to 31, characterized in that the removable printing ink (8) is removed by washing out with a liquid, preferably with water.
- The method according to any of the claims 20 to 32, characterized in that the security element (2) is equipped with further layers for protection against chemical and/or mechanical influences and/or for promoting the capability of being applied to or incorporated in paper.
- The method according to any of the claims 20 to 33, characterized in that the security element (2) is cut to size as a security thread or as a security band.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006023866A DE102006023866A1 (en) | 2006-05-19 | 2006-05-19 | security element |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1857295A2 EP1857295A2 (en) | 2007-11-21 |
EP1857295A3 EP1857295A3 (en) | 2014-04-02 |
EP1857295B1 true EP1857295B1 (en) | 2015-07-08 |
Family
ID=38362869
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07009604.5A Revoked EP1857295B1 (en) | 2006-05-19 | 2007-05-14 | Safety element |
Country Status (2)
Country | Link |
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EP (1) | EP1857295B1 (en) |
DE (1) | DE102006023866A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012153114A1 (en) * | 2011-05-06 | 2012-11-15 | D W Spinks (Embossing) Limited | Windowed security device |
DE102020125128A1 (en) | 2020-09-25 | 2022-03-31 | Leonhard Kurz Stiftung & Co. Kg | Multi-layer body and method for producing a multi-layer body |
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WO1992011142A1 (en) | 1990-12-20 | 1992-07-09 | Gao Gesellschaft Fúr Automation Und Organisation Mbh | Magnetic metallic security thread with negative inscription |
WO1997023357A1 (en) | 1995-12-22 | 1997-07-03 | Giesecke & Devrient Gmbh | Security document with a security component and method for the production thereof |
WO1999013157A1 (en) | 1997-09-08 | 1999-03-18 | Giesecke & Devrient Gmbh | Secure sheet for bank note paper and method for making same |
WO2001026060A2 (en) | 1999-10-07 | 2001-04-12 | Technical Graphics Security Products, Llc | Security device with foil camouflaged magnetic regions and methods of making same |
WO2003061980A1 (en) | 2002-01-25 | 2003-07-31 | De La Rue International Limited | Improvements in methods of manufacturing substrates |
DE10226177A1 (en) | 2002-06-12 | 2003-12-24 | Giesecke & Devrient Gmbh | Layered composite for security element |
WO2004111338A1 (en) | 2003-06-17 | 2004-12-23 | Hueck Folien Ges.M.B.H | Security element with visually recognisable and machine readable characteristics |
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DE3887497D1 (en) | 1988-03-04 | 1994-03-10 | Gao Ges Automation Org | Security element in the form of a thread or tape for embedding in security documents and method for producing the same. |
DE19650759A1 (en) * | 1996-12-06 | 1998-06-10 | Giesecke & Devrient Gmbh | Security element |
DE19731968A1 (en) * | 1997-07-24 | 1999-01-28 | Giesecke & Devrient Gmbh | Security document |
-
2006
- 2006-05-19 DE DE102006023866A patent/DE102006023866A1/en not_active Withdrawn
-
2007
- 2007-05-14 EP EP07009604.5A patent/EP1857295B1/en not_active Revoked
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WO1992011142A1 (en) | 1990-12-20 | 1992-07-09 | Gao Gesellschaft Fúr Automation Und Organisation Mbh | Magnetic metallic security thread with negative inscription |
WO1997023357A1 (en) | 1995-12-22 | 1997-07-03 | Giesecke & Devrient Gmbh | Security document with a security component and method for the production thereof |
WO1999013157A1 (en) | 1997-09-08 | 1999-03-18 | Giesecke & Devrient Gmbh | Secure sheet for bank note paper and method for making same |
WO2001026060A2 (en) | 1999-10-07 | 2001-04-12 | Technical Graphics Security Products, Llc | Security device with foil camouflaged magnetic regions and methods of making same |
WO2003061980A1 (en) | 2002-01-25 | 2003-07-31 | De La Rue International Limited | Improvements in methods of manufacturing substrates |
DE10226177A1 (en) | 2002-06-12 | 2003-12-24 | Giesecke & Devrient Gmbh | Layered composite for security element |
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EIDESSTATTLICHE ERKLÄRUNG ?FORINT'' MIT ANLAGEN A UND B, 8 April 2016 (2016-04-08), XP055270971 |
Also Published As
Publication number | Publication date |
---|---|
DE102006023866A1 (en) | 2007-11-22 |
EP1857295A3 (en) | 2014-04-02 |
EP1857295A2 (en) | 2007-11-21 |
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