EP0435029B2 - Datenträger mit einem Flüssigkristall-Sicherheitselement - Google Patents
Datenträger mit einem Flüssigkristall-Sicherheitselement Download PDFInfo
- Publication number
- EP0435029B2 EP0435029B2 EP90123341A EP90123341A EP0435029B2 EP 0435029 B2 EP0435029 B2 EP 0435029B2 EP 90123341 A EP90123341 A EP 90123341A EP 90123341 A EP90123341 A EP 90123341A EP 0435029 B2 EP0435029 B2 EP 0435029B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid crystal
- data carrier
- security element
- carrier
- crystal material
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/364—Liquid crystals
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
- G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
- G07F7/086—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means by passive credit-cards adapted therefor, e.g. constructive particularities to avoid counterfeiting, e.g. by inclusion of a physical or chemical security-layer
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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
-
- 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
-
- B42D2033/26—
Definitions
- the invention relates to data carriers, such as securities or identity cards with a optically variable security element that serves as an authenticity feature and different color impressions at different viewing angles mediates, and which contains a liquid crystalline material containing a liquid crystal polymer is, which in oriented form at room temperature as a solid is present and in which the liquid crystalline state in a polymer matrix is frozen.
- the invention also relates to a method for producing the data carrier.
- optically variable elements as security elements propagated. Such elements have in common that depending on lighting and viewing conditions different color or brightness renditions exhibit.
- optically variable elements include diffraction gratings, Holograms, interference coatings, metameric colors and polarizing coatings.
- a card is already from WO-A-82/02445 known that contains optically recognizable markings, these markings in turn with a liquid crystal element are covered.
- the normal state is the liquid crystalline layer opaque so that the mark underneath is not can be seen.
- By inserting the card in the liquid crystal is an electric field But put the layer in a transparent state, so that the marking for test purposes becomes recognizable.
- Holograms and gratings are based on diffraction effects.
- Interference coatings exist usually from several superimposed ones Layers, the layer thicknesses in size the wavelength of light.
- Metameric printing inks usually exist from mixtures of pigments with different Remission gangs. This composition causes a change in the type of lighting the metameric colors their visual color impression change.
- Dichroic dyes have the property white light depending on the polarization direction in different Absorb wavelength ranges. The result is a polarization-dependent color impression.
- liquid crystal polymers are more appropriately oriented Manufacture a plastic-like one at room temperature Solid body with a pronounced Color interplay.
- Such a suitable manufacturing process consists, for example, of doctoring of the still liquid material on a base and the subsequent curing by UV radiation.
- liquid crystal polymers in particular liquid crystal silicone polymers and cholesteric organopolysiloxanes.
- suitable Liquid crystal polymers, their chemical structure and their manufacture are published in the Patent applications EP-OS 0 136 501, EP-OS 0 060 335 and EP-PS 0 066 137. On the disclosure content of these publications expressly referred.
- Liquid crystals behave despite a structural one Anisotropy usually like a liquid, which is why it is necessary to use these materials enclosed in capsules or cavities. From this results in a complicated manufacturing technique.
- the complex encapsulation of the FK materials it is because of the risk of injury to the cavities or capsules not possible the suggested Security elements in the conventional Way under pressure and heat application (classic laminating technology) in foils or identity papers embed.
- the suggested Security elements in the conventional Way under pressure and heat application (classic laminating technology) in foils or identity papers embed.
- Liquid crystals can, however, also be used accordingly Processing in solid form and depending on the processing method have high level alignment of their molecules, whereby the optically variable properties in full Stand out in scope and in full brilliance. at exceeds the LC systems according to the invention the color purity of the reflected light is rare a range of 100 nm, the color change effects with the change in the viewing angle are very pronounced, the reflected and transmitted Light has a pronounced circular polarization on.
- the fully trained optically variable Properties make such FK polymers in particularly suitable for use as Security element on data carriers, securities and ID cards. The color changing games are themselves easy to observe for laypeople.
- the wavelength selective Make reflectivity and the polarization effects the material highly suitable for one automated testing.
- the object of the invention is to further modify the known security feature. This task is carried out by the independent Features mentioned claims solved.
- the invention makes itself known take advantage of the fact that due to the IR transmission of the LC polymers Machine features can be arranged under the FK polymers.
- the solid state properties of the FK polymers significantly ease it out of them To manufacture security elements. For the first time it does not apply enclosing the liquid crystals in one Hollow body, secondly there is no risk of Bursting and leakage of the liquid crystals during subsequent processing steps and during the life of the disk.
- the Design manufacturing processes and the application very easy.
- the plastic-like properties of the Liquid crystal polymers enable easy Processing to semi-finished or finished product.
- the starting material is generally as granules and can be used with those from plastic production known methods and machines shaped and processed. Thereby it becomes in the field of security technology possible, entirely on the basis of LC polymers different types of security elements manufacture and various use cases cover.
- So carrier webs can be made from a tearproof Plastic coated with a layer of FK polymer become.
- the resulting web of material can subsequently become narrow webs or threads to be cut in as security threads Paper or other substances can be embedded can.
- multi-layer Foil sheets are made that have an embedded Contain a layer of an FK polymer.
- Such sheets can be used as adhesive or transfer tapes be designed to stick on or stamping transfer elements on paper or plastic surfaces.
- FK polymers can also be used as Produce self-supporting foils. These slides can for example as film layers for multilayer ID cards are used.
- FIGS. 9a and b relate to FIGS. 9a and b, not the invention.
- FK polymers are a special variant of Liquid crystals, in which the liquid crystalline Is "frozen" in a polymer matrix, which makes the optical properties special stand out significantly. So absorb liquid crystal polymers usually no light, their coloring arises from multiple interference of light at the individual crystal levels. The color impression in reflected and transmitted light is accordingly different. Contains the reflected color spectrum only a narrow frequency range around a central one Wavelength and thereby shows a high Color saturation. The transmitted spectrum is complementary to reflect and shows a slump in the range around the central wavelength.
- the lattice constants of inventive oriented FK polymers can range from 300 nm to 1,000 nm set or at Synthesis can be defined so that the reflected Central wavelength with vertical incidence in the near Infrared or in the visible. With flatter the observation angle that shifts Central wavelength of the reflection band in the direction shorter wavelengths. For example the wavelength reflected in supervision in comparison for reflection at 60 ° larger by approx. 20%.
- Fig. 1 shows the spectral reflection R one FC layer with vertically incident lighting in curve 1 and with one direction of illumination of 60 ° in curve 2.
- the color impression can accordingly for special FK polymers from green to violet, from yellow to blue, from light red to green or with an IR reflection band of black change to red.
- the lattice constant and therefore the basic color of the liquid crystal polymer depends on the exact chemical structure of the liquid crystal and can by the synthesis conditions defined in the range between 300 and 1,000 nm can be set.
- Fig. 2 shows an application of an LC polymer for a window security thread.
- a security thread 13 during papermaking is embedded in such a way that he was in the windows 14 on the surface of the paper lies and is therefore visually recognizable.
- the width of such fluctuates Security threads between 0.5 and a few Millimeters.
- FIG. 3 shows a first variant in cross section for a security thread 13a; it consists of one Plastic carrier 20, preferably for this a polyester film with a typical thickness of 20 - 100 microns used.
- the carrier 20 is on one side with a thickness of several micrometers Layer 21 coated from an FK polymer.
- Layer 21 coated from an FK polymer.
- the film 20 is preferred colored black.
- the thread is during the papermaking so oriented that the liquid crystal layer is present on the visible outer surface.
- Fig. 4 shows in cross section as a further variant a security thread 13b with a symmetrical Layer structure.
- Symmetrical security threads have the advantage that during the embedding in the paper does not depend on the orientation must pay attention to the thread.
- the thread 13b is made of two carrier films 20, both one-sided coated from a layer 21 of LC polymers are.
- the carrier films 20 are with a laminating agent 22 connected so that a symmetrical layer structure with external FK layers are created.
- To the richness of color you can choose to increase the carrier webs 20 and / or the laminating agent 22 with Color transparent or pigment colors. A In terms of manufacturing technology, it is only the Coloring agent 22, preferably opaque black is used for this.
- Fig. 5 shows a further variant of a symmetrical constructed security thread 13c in Cross-section.
- the carrier films 20 on the outer sides of the thread 13c and thus protect the internal FK layers 21 from damage.
- the lamination mediator colored with a dye. Because the outside Backing layers 20 must remain transparent, they either fail or become weak colored.
- FIG. 6a and 6b show a further variant of a security thread 13d in cross section (Fig. 6a) and in supervision (Fig. 6b).
- the thread 13d has analogous to FIG. 5, a symmetrical layer structure from two carrier films 20, two FK layers 21 and an adhesive layer 22.
- a Manufacturing process became the thread of two coated film pairs 30, 31 assembled.
- Print image 34 provided in black color and although on the surface of a FK polymer layer in a conventional printing process
- Alphanumeric characters applied in micro script In addition, a transparent lamination agent 22 used. Appear in transmitted light now in the window areas of the paper the characters black in front of the optically variable Color background of the polymer layer. In incident light however, only the micro characters show one Color change.
- the security thread 6a and 6b are the characters 34 in green microprint on one of the FK layers applied while the lamination agent 22nd is colored black.
- the FK material chosen so that it is under a certain Viewing angle, for example under a vertical one Incidence on the black background appears in green.
- the total area then appears at this angle green.
- the viewing angle changes the color of the FK polymer layer changes, while in the font the green hue remains dominant. The result is a security thread whose writing only when the Thread becomes visible.
- the security thread consists of a carrier film 20 and a layer 21 made of LC polymers.
- the polymer layer was made in a conventional Printing process with a pattern of different colored, diagonal stripes 40 printed.
- pattern 40 red 41, yellow 42, green 43, blue 44 selected Patterns repeated any number of times over the thread length.
- the FK polymer can with appropriate color matching of the FK polymer with the colored stripes with the one shown Arrangement when the thread is tilted Illusion of a moving along the thread colored stripe.
- Analogous 5 this embodiment variant can also be used to a security thread with a symmetrical Expand layer structure.
- the variants shown in Figs. 3-7 can depending on the desired appearance can be varied in many ways.
- the optically variable Effects of the FK polymers can be Coloring any layers with "classic" Combine colors, being both dyes transparent dyes as well as pigment dyes can be used.
- the dyes themselves can be in any layer (also in the FK layer, then only in low concentrations) of the security thread and / or as a printed image on any other Layer of thread to be applied.
- the variants of Security threads can be based on a produce a single semi-finished product.
- a film web 20 from a Backing material such as polyester plastic with a Layer 21 of FK polymers coated.
- the thickness of the film web is preferably in the range of less than a tenth of a millimeter, for the FK coating there is usually a film thickness of about 10 microns is sufficient.
- the typical web widths of the semi-finished product in the range of one meter.
- the thread width depends on the desired application between an area from 0.5 - 5.0 mm.
- the threads thus obtained are particularly suitable for embedding in paper, can also between the plastic layers an ID card can be embedded.
- Another class of security elements form the transfer elements, they are often up Credit cards, ID cards, banknotes, securities and the like applied to them from counterfeiting and especially before duplication protect by copying.
- Security elements on the base are also suitable of FK polymers due to their optically variable Characteristics.
- the transfer elements are after the transfer process of carrier tapes on the surface of the objects to be protected transfer.
- the 8a and 8b show an identification card 50 with a symbolically indicated data record 49 and with a transfer security element 51 in supervision and as a sectional view.
- the security element 51 contains a layer of an FK polymer, which is why it is typical of these materials Has color change interactions.
- Fig. 8b shows a section through the ID card along the line l / l in Fig 8a.
- the height of the element is strong exaggerated, usually it is only a few 10 microns.
- Lie on the substrate 53 successively an adhesive layer 54, a protective lacquer layer 55, an FK layer 56 and to the outside final protective lacquer layer 57.
- This security element this in a very simple Embodiment is shown, can be varied Ways vary.
- Fig. 8 crest shape 61 shown is therefore representative for a strip, a seal, a company logo, an alphanumeric character, a number, Guilloche pattern, etc.
- shape of the Outline 61 receives the optically variable element an individual expression.
- FIG. 9a and 9b show in supervision and as Sectional view of an application variant according to the invention, in the map data with an FK element at the same time inconspicuous camouflaged and protected from falsification.
- FK polymers with visually visible color change interactions are mostly transparent and in the infrared can thus be effortlessly in the infrared range legible codes can be combined.
- the first printing process was done on the surface a card 70 with an IR absorbent Ink 71 applied a code 72.
- this IR coding 72 an IR-transparent, in the visible spectral range but opaque opaque color 73 overprinted.
- an FK security element was created 74 on this area on the Cover color 73 sealed.
- Fig. 10 shows the structure of a transfer belt 100 in cross section as it is for applying Security elements with an LC layer on one Substrate surface is suitable.
- a carrier film 101 On a carrier film 101 there are successively a layer of wax 102, a protective lacquer layer 103, a Layer of an FK polymer 104, a color layer 105 and a hot glue layer 106.
- Die Carrier film preferably consists of a tear-resistant Plastic (polyester) with a thickness in the area less than a tenth of a millimeter.
- the remaining layers of a transfer belt usually a thickness of a few micrometers up to a few 10 micrometers.
- the one on the Form layers 103-106 lying in the wax layer the later security element.
- the transfer belt can be of color effects during colored in different layers during its manufacture or printed.
- the substrate becomes the transfer belt 100 as shown in FIG. 11, with the hot-melt adhesive layer 106 on the Substrate 111 placed and pressed.
- the pressing is done with a heated transfer stamp 112 or alternatively with a transfer roller. Under pressure and heat combines the hot glue layer with the substrate. simultaneously melts the separation layer 102 and enables this Peeling off the carrier material 101.
- FK polymers can also be processed into films. In this form, they are particularly suitable as large or full-surface security elements for multi-layer ID cards.
- a laminated ID card 120 which consists of a Paper liner 121 and two external thermoplastic Cover foils 122 and 123 exist.
- the Layers are applied under pressure and heat pressed into a compact ID card.
- the card information is usually on printed on the ticker, in the example shown an image of the holder 124, card data 125 and a Has company logo 126.
- To increase the security against counterfeiting was in between building the map the ticking and the top cover foil in the left half of the card is a film made of FK polymer 127 inserted.
- the color change interactions of the liquid crystal film can be through the transparent cover film watch, with the colored printed company logo 126 additional color effects added.
- FK connections network under the influence high energy (e.g. UV) radiation and This is the only way to form a chemically stable film.
- Unexposed, i.e. H. unhardened areas can be removed with solvents.
- Analogous to the known phototechnical processes of Semiconductor and printing plate manufacturing technology can be used to define a defined area of a FK film exposed through a mask and then the coating in the unexposed areas be chemically removed so that patterns, Letters, numbers etc. arise.
- Such slides are preferably made of a liquid crystal substance manufactured.
- the LC substance processed on a roller mill.
- the alignment necessary for the optical effects the liquid crystal molecules are caused by shear forces, that occur during rolling.
- the so made Foil material is particularly suitable for production of ID cards, but can also be other authenticity marks, such as a security thread.
- Liquid crystal polymers are particularly suitable Way their polarization properties and their Wavelength selectivity.
- the reflected light is initially spectrally on a range around the central wavelength constricted, moreover it becomes unpolarized Light in liquid crystal operators in right and left rotating components disassembled. ever according to the chemical composition of the polymer only one of the two parts is reflected while the complementary part is transmitted.
- One way of machine testing is the following on a film made of FK polymer depicted on a black, complete absorbent carrier 128.
- element 130 is placed under a predetermined angle with an unpolarized Light beam 131, for example an incandescent lamp 129 illuminated. After reflection, the light beam hits 132 to the detector system shown in FIG. 14 133 with which the detection of the spectral Filtering and circular polarization performed becomes.
- the structure of the detector system 133 shows Fig. 14. Passes through detector system 133 the reflected beam 132 is initially a color filter 141, the only light of the expected central wavelength lets happen. Then the light beam hits a lambda / 4 plate 142, which is the circular polarization converted to a linear polarization. Subsequently the light falls on a 1: 1 beam splitter 143, from where the two partial beams 144, 145 on two detectors 146, 147 arranged in front of it Polarization filters 148, 149 arrive.
- the polarization planes 150, 151 of the two filters are available perpendicular to each other, they are at the same time under both optical axes of the Lambda / 4 plate 45 ° aligned.
- the detector system can be realized in many ways.
- 15 shows as a maintenance friendly alternative an arrangement using optical fibers.
- the basis of the optical arrangement is again Fig. 13.
- the detector system 133 runs through the light beam 132 first reflected a color filter 161 for checking the central wavelength.
- Lambda / 4 plate 162 becomes the circular Polarization converted to linear.
- a coupling optics 153 couples the light beam 132 into Optical fiber system 154, known beam switches split the beam into equivalent sub-beams. At the end of each sub-bundle there is a pair of polarizers and detectors 155/156 and 157/158 for the two different directions of polarization.
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Credit Cards Or The Like (AREA)
- Liquid Crystal (AREA)
- Laminated Bodies (AREA)
- Burglar Alarm Systems (AREA)
Description
- Fig. 1
- die spektralen Transmissions- und Reflexionseigenschaften von FK-Polymeren unter verschiedenen Betrachtungswinkeln,
- Fig. 2
- eine Banknote mit einem Fenster-Sicherheitsfaden mit einer oder mehreren Schichten aus FK-Polymeren,
- Fig. 3
- einen Sicherheitsfaden mit einer Schicht aus einem FK-Polymer,
- Fig. 4
- einen symmetrisch aufgebauten Sicherheitsfaden mit außenliegenden Schichten aus FK-Polymeren,
- Fig. 5
- einen symmetrisch aufgebauten Sicherheitsfaden mit innenliegenden Schichten aus FK-Polymeren,
- Fig. 6a, b
- einen bedruckten, symmetrischen Fenster-Sicherheitsfaden im Querschnitt und Aufsicht,
- Fig. 7a, b
- einen bedruckten Sicherheitsfaden mit Bewegungseffekten im Querschnitt und Aufsicht,
- Fig. 8a, b
- eine Ausweiskarte mit einem Transferelement mit einer FK-Schicht in Aufsicht und als Schnittbild,
- Fig. 9a, b
- eine Ausweiskarte nach der Erfindung mit einer visuell nicht lesbaren, durch das Sicherheitselement abgedeckten Kodierung,
- Fig. 10
- einen Querschnitt durch ein Transferband,
- Fig. 11
- den Transfer eines FK-Sicherheitselements auf ein Substrat,
- Fig. 12a, b
- eine Ausweiskarte mit einer einkaschierten Schicht aus FK-Polymer.
- Fig. 13
- eine Prüfanordnung für FK-Sicherheitselemente,
- Fig. 14, 15
- Detektoranordnungen zum Nachweis von FK-Sicherheitselementen.
Claims (20)
- Datenträger, wie Wertpapier oder Ausweiskarte mit einem optisch variablen Sicherheitselement, das als Echtheitsmerkmal dient und bei unterschiedlichen Betrachtungswinkeln unterschiedliche Farbeindrücke vermittelt, und das ein flüssigkristallines Material enthält, das ein Flüssigkristallpolymer ist, welches in orientierter Form bei Raumtemperatur als Festkörper vorliegt und bei dem der flüssigkristalline Zustand in einer Polymermatrix eingefroren ist, dadurch gekennzeichnet daß auf dem Datenträger unter dem Sicherheitselement eine visuell nicht sichtbare Kodierung (72) aufgebracht ist.
- Datenträger nach Anspruch 1, dadurch gekennzeichnet, daß das Material ein vernetztes Flüssigkristall-Silikonpolymer ist.
- Datenträger nach Anspruch 1, dadurch gekennzeichnet, daß das Material ein vernetztes Organopolysiloxan oder ein vernetztes Organooxysilan ist oder eine vernetzte Verbindung mit einem Organopolysiloxan oder einem Organooxysilan darstellt.
- Datenträger nach Anspruch 1, dadurch gekennzeichnet, daß das Flüssigkristallpolymer als Schicht oder Film im Sicherheitselement oder im Datenträger vorliegt
- Datenträger nach Anspruch 4, dadurch gekennzeichnet, daß die Schicht oder der Film mehrfach jeweils auf Trägerfolien (20) vorliegen, die paarweise mit einem Kaschiervermittler (22) so aneinander gefügt sind, daß ein symmetrischer Schichtaufbau (13c, 13d) entsteht.
- Datenträger nach Anspruch 4, dadurch gekennzeichnet, daß zumindest eine Fläche des Sicherheitselementes mit transparenten, absorbierenden und/oder reflektierenden Farben (34,40) bedruckt oder eine Schicht des Sicherheitselements mit derartigen Farben eingefärbt ist.
- Datenträger nach Anspruch 6, dadurch gekennzeichnet, daß das Sicherheitselement in einem bedruckten und/oder beschrifteten Bereich (60) des Datenträgers aufgebracht ist..
- Datenträger nach mindestens einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das Flüssigkristallpolymer als Folie (127) verarbeitet ist.
- Datenträger nach Anspruch 8, dadurch gekennzeichnet, daß die Folie (127) als Sicherheitselement in den Aufbau eines mehrschichtigen Datenträgers (120) eingefügt ist.
- Datenträger nach Anspruch 9, dadurch gekennzeichnet, daß die Folie eine Deckfolie (122, 123) des Datenträgers ist.
- Verfahren zur Herstellung eines Datenträgers mit einem optisch variablen Sicherheitselement, das als Echtheitsmerkmal dient und bei unterschiedlichen Betrachtungswinkeln unterschiedliche Farbeindrücke vermittelt, nach mindestens einem der vorangehenden Ansprüche, gekennzeichnet durch folgende Schritte:Aufbringen einer visuell nicht sichtbaren Kodierung auf den DatenträgerAufbringen des noch flüssigen polymeren Flüssigkristallmaterials auf eine Trägerfläche,Orientieren des polymezen Flüssigkristallmaterials durch mechanische Einwirkung von Scherkräften,Aushärten des orientierten Materials zum Festkörper, so daß der flüssigkristalline Zustand in der Polymermatrix eingefroren wird,Ein- oder Aufbringen des polymeren Flüssigkristallfestkörpermaterials in oder auf den Schichtaufbau des Datenträgers über der Kodierung.
- Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß das noch flüssige polymere Flüssigkristallmaterial auf eine separate Trägerfolie aufgebracht wird.
- Verfahren nach Anspruch 11 oder 12, dadurch gekennzeichnet, daß die Orientierung durch Aufrakeln des Flüssigkristallmaterials erfolgt.
- Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß die Trägerfläche eine Druckwalze ist, auf die das Flüssigkristallmaterial direkt aufgerakelt oder aufgewalzt wird und von der das Flüssigkristallmaterials durch einen Druckvorgang auf eine Fläche des Datenträgers übertragen wird.
- Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß das Aushärten durch definierte Energiezufuhr erfolgt.
- Verfahren nach Anspruch 15, dadurch gekennzeichnet, daß die Energiezufuhr durch Bestrahlung mit UV- oder IR-Licht erfolgt.
- Verfahren nach Anspruch 15, dadurch gekennzeichnet, daß die Energie-Zuruhr durch Einwirkung eines Elektronenstrahls erfolgt.
- Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß das Flüssigkristallmaterial auf der Trägerfläche einen selbsttragenden Film bildet, der nach dem Aushärten abgelöst wird.
- Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß das polymere Flüssigkristallmaterial in orientierter und ausgehärteter Form von der Trägerfläche auf den Datenträger oder eine Schicht des Datenträgers im Transferverfahren übertragen wird.
- Verfahren nach mindestens einem der Ansprüche 11 bis 19, dadurch gekennzeichnet, daß das Aushärten des Flüssigkristallmaterials nur in Teilbereichen erfolgt und die nicht ausgehärteten Bereiche nach dem Aushärtungsschritt entfernt werden.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3942663 | 1989-12-22 | ||
DE3942663A DE3942663A1 (de) | 1989-12-22 | 1989-12-22 | Datentraeger mit einem fluessigkristall-sicherheitselement |
Publications (4)
Publication Number | Publication Date |
---|---|
EP0435029A2 EP0435029A2 (de) | 1991-07-03 |
EP0435029A3 EP0435029A3 (en) | 1991-09-18 |
EP0435029B1 EP0435029B1 (de) | 1995-08-09 |
EP0435029B2 true EP0435029B2 (de) | 2003-01-02 |
Family
ID=6396250
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90123341A Expired - Lifetime EP0435029B2 (de) | 1989-12-22 | 1990-12-05 | Datenträger mit einem Flüssigkristall-Sicherheitselement |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0435029B2 (de) |
JP (1) | JP3244278B2 (de) |
AT (1) | ATE126135T1 (de) |
CA (1) | CA2032587C (de) |
DE (2) | DE3942663A1 (de) |
ES (1) | ES2075871T5 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007023560A1 (de) | 2007-05-21 | 2008-11-27 | Ovd Kinegram Ag | Mehrschichtkörper |
DE102007034716A1 (de) | 2007-07-23 | 2009-01-29 | Giesecke & Devrient Gmbh | Sicherheitselement |
US7560156B2 (en) | 2002-05-22 | 2009-07-14 | Leonhard Kurz Gmbh & Co. Kg | Strip shaped safeguarding element |
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-
1989
- 1989-12-22 DE DE3942663A patent/DE3942663A1/de not_active Withdrawn
-
1990
- 1990-12-05 AT AT90123341T patent/ATE126135T1/de not_active IP Right Cessation
- 1990-12-05 ES ES90123341T patent/ES2075871T5/es not_active Expired - Lifetime
- 1990-12-05 EP EP90123341A patent/EP0435029B2/de not_active Expired - Lifetime
- 1990-12-05 DE DE59009504T patent/DE59009504D1/de not_active Expired - Lifetime
- 1990-12-18 CA CA002032587A patent/CA2032587C/en not_active Expired - Fee Related
- 1990-12-21 JP JP40517890A patent/JP3244278B2/ja not_active Expired - Fee Related
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7560156B2 (en) | 2002-05-22 | 2009-07-14 | Leonhard Kurz Gmbh & Co. Kg | Strip shaped safeguarding element |
US7812343B2 (en) | 2005-04-15 | 2010-10-12 | Polyic Gmbh & Co. Kg | Multilayer composite body having an electronic function |
US7940340B2 (en) | 2005-07-04 | 2011-05-10 | Polyic Gmbh & Co. Kg | Multilayer body with electrically controllable optically active systems of layers |
US7846838B2 (en) | 2005-07-29 | 2010-12-07 | Polyic Gmbh & Co. Kg | Method for producing an electronic component |
US8315061B2 (en) | 2005-09-16 | 2012-11-20 | Polyic Gmbh & Co. Kg | Electronic circuit with elongated strip layer and method for the manufacture of the same |
DE102007023560A1 (de) | 2007-05-21 | 2008-11-27 | Ovd Kinegram Ag | Mehrschichtkörper |
DE102007023560B4 (de) * | 2007-05-21 | 2009-02-05 | Ovd Kinegram Ag | Mehrschichtkörper |
DE102007034716A1 (de) | 2007-07-23 | 2009-01-29 | Giesecke & Devrient Gmbh | Sicherheitselement |
Also Published As
Publication number | Publication date |
---|---|
DE59009504D1 (de) | 1995-09-14 |
DE3942663A1 (de) | 1991-06-27 |
CA2032587A1 (en) | 1991-06-23 |
ATE126135T1 (de) | 1995-08-15 |
JPH04144796A (ja) | 1992-05-19 |
EP0435029A2 (de) | 1991-07-03 |
EP0435029A3 (en) | 1991-09-18 |
ES2075871T5 (es) | 2003-07-16 |
EP0435029B1 (de) | 1995-08-09 |
CA2032587C (en) | 1996-07-09 |
JP3244278B2 (ja) | 2002-01-07 |
ES2075871T3 (es) | 1995-10-16 |
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