Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/40—Manufacture
  • B42D25/45—Associating two or more layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
  • B41M5/28—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
  • B41M5/34—Multicolour thermography
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/30—Identification or security features, e.g. for preventing forgery
  • B42D25/324—Reliefs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/30—Identification or security features, e.g. for preventing forgery
  • B42D25/328—Diffraction gratings; Holograms
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/30—Identification or security features, e.g. for preventing forgery
  • B42D25/351—Translucent or partly translucent parts, e.g. windows
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/30—Identification or security features, e.g. for preventing forgery
  • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
  • B42D25/378—Special inks
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/40—Manufacture
  • B42D25/405—Marking
  • B42D25/41—Marking using electromagnetic radiation
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/40—Manufacture
  • B42D25/405—Marking
  • B42D25/43—Marking by removal of material
  • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/40—Manufacture
  • B42D25/45—Associating two or more layers
  • B42D25/455—Associating two or more layers using heat
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • 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
  • B42D25/46—Associating two or more layers using pressure
• • 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

Definitions

• the invention relates to a multi-layer body as a multi-layer film, preferably transfer film or laminating film or as a layer composite formed from laminated at least one overlay film and preferably inlet, with a laser-sensitive layer.
• the invention further relates to a method for producing a multilayer image in such a multilayer body.
• Bodies which consist of laser-sensitive material.
• plastic bodies namely as a solid body or coating, each containing a mixture of different pigments.
• Color treatment is performed on the plastic body or in the coating by laser treatment.
• WO 98/19868 describes a process which works with special yellow, magenta and cyan pigments which can be activated by UV light in a first step and are only bleached in a subsequent second step.
• DE 199 55 338 also discloses a method for producing color markings by laser treatment using a mixture of cyan pigment, magenta pigment and yellow pigment, these pigments being selectively bleached by red laser light, green laser light and blue laser light. This method is described for the use of a plastic body which is made of a material with the pigment mixture in question.
• EP 0 327 508 discloses a process in which a laser-sensitive dye A and a laser-insensitive dye B are contained in two separate layers one above the other or alternatively in a common layer and the dye A is bleached by laser treatment. With the laser treatment, a color marking is thus obtained which, however, only contains a color change in the dye A, that is to say that only a maximum of two-color image is obtained.
• a method is known from EP 0 190 997 B1, in which in a plastic layer designed as a coating of a metal plate or in a Plastic plate an additive is included, which should change color during laser treatment, either by changing color from one color to another or by converting it to black.
• GB 2 240 948 A also describes the laser marking of identity cards. Laser marking is done here by removing different layers of color. The laser marking obtained appears as a colored marking.
• a hot stamping foil with a hologram structure is known from EP 0 420 261, which is individualized via laser treatment for the purpose of security against forgery.
• the laser beam is used to change the material or color or to remove partial areas in the layer structure of the film.
• EP 0 219 011 B1 describes a special method for laser marking identification cards. In this process, black markings are made in various transparent layers of the card using the laser. In Paralax images are obtained in this way with the interacting transparent layers.
• the invention has for its object to provide a multi-layer body which ensures particularly high security against forgery by laser treatment and enables special laser-induced markings.
• the object of the invention is to provide a method for producing new types of complex laser-induced markings.
• the invention solves the problem with the multilayer body according to claim 1 and the method for producing a laser-induced multilayer image in such a multilayer body according to method claim 9.
• the multilayer body has a first laser-sensitive layer and a second laser-sensitive layer, in which differently designed laser-induced image components can be generated, creates the possibility of generating a complex composite laser-induced multilayer image.
• the laser-sensitive layer with the laser-sensitive colorant it becomes possible to generate a colorful laser-induced image component which can be designed as a multicolor or full-color image when using a corresponding laser-sensitive colorant mixture of two or three bleachable colorant components.
• Another laser-sensitive material can be used in the other laser-sensitive layer, ie a different colorant mixture or also a material doped with carbon or carbon black, in which a different color marking, preferably multi-colored, is used in the laser treatment
• Color image or a black marker, preferably a grayscale image can be generated.
• the various laser-sensitive layers can be arranged more or less, preferably overlapping one another in some areas, and more or less, if necessary, can only be made transparent in some areas.
• specific control of the laser treatment of the different laser-sensitive layers specific different image components can be generated in a laser-induced manner, which can work together to form an arbitrarily complex multilayer image.
• Multilayer images with particularly interesting optical effects are possible if, in addition to the several laser-sensitive layers, the layer structure also contains diffraction and / or hologram structures, which e.g. result in different optical effects in different viewing angles in connection with the different laser-induced image components arranged in the different layers.
• the laser-sensitive layers can be formed in such a way that they are sensitive only under certain laser conditions, for example only at a certain laser wavelength or angle of incidence.
• a special background layer can be arranged as an intermediate layer between the laser-sensitive layers, which acts like a barrier layer for certain layers Laser radiation, for example depending on the laser wavelength, the angle of incidence etc.
• this background layer which acts as a barrier layer, can also be formed only in regions, that is to say only under a partial region of the laser-sensitive layer arranged above it, preferably only in an region which lies below the laser-induced marking.
• barrier and intermediate layers By arranging such barrier and intermediate layers only in regions, special additional effects can also be obtained, namely that, for example in laser irradiation in regions with an intermediate layer, only laser-induced marking in the upper laser-sensitive layer and then in regions without an intermediate layer in both laser-sensitive layers, different laser-induced layers lying one above the other Markers can be obtained as combined markers.
• Particularly interesting optical effects are obtained when the laser-sensitive materials of the layers are different, so that, for example, a color marking is generated in one layer and a black marking, preferably a grayscale image, is generated in the other layer.
• FIG. 1 shows a sectional view of an exemplary embodiment of a transfer film with two laser-sensitive layers
• FIG. 2 shows a sectional view of an exemplary embodiment of a laminating film with a structure corresponding to that of the transfer film in FIG. 1;
• Fig. 3 is a sectional view of another embodiment of a
• FIG. 4 is an exploded view of a laminated body made of several overlay foils and inlets, two laser-sensitive layers also being present.
• Fig. 5 is a sectional view of another embodiment
• Fig. 6 is a sectional view of the embodiment in Fig. 5 for
• Fig. 7 is a plan view of a laser-induced image of the
• the hot stamping foil shown in FIG. 1 is a multilayer body with two laser-sensitive layers 4, which are formed on both sides of a reflection layer 5r. By laser treatment of this multilayer body, different laser-induced markings can be made in the laser-sensitive layers, so that a composite laser-induced multilayer image is generated.
• layer 4 also has two laser-sensitive layers, namely layer 4, which is arranged on the underside of upper overlay film 30 in a hot stamping film applied there, and layer 32, which is designed as a separate doped overlay film.
• layer 4 which is arranged on the underside of upper overlay film 30 in a hot stamping film applied there
• layer 32 which is designed as a separate doped overlay film.
• the layers in the film in FIG. 1 are in the following order:
• the laser-sensitive layers 4 formed on both sides of the reflection layer 5r can be identical, ie the reflection layer is then in this laser-sensitive overall layer arranged. However, the laser-sensitive layers can also be designed differently.
• a diffraction structure 5b is formed in mutually adjacent regions of the laser-sensitive layer 4 and the reflection layer 5r. Alternatively, structure 5b can also be designed as a hologram structure. In the exemplary embodiment, increased security against forgery results from the fact that two laser-sensitive layers adjoin the diffraction or hologram structure, which can be of the same or different design.
• the lacquer layer 5, which is optional, is designed here as a transparent layer or as a light backup layer.
• the lacquer layer 5 and the adhesive layer 6 can also be omitted and the second laser-sensitive layer 4 shown in FIG. 1 under the reflection layer 5r can be designed as a laser-sensitive adhesive layer.
• Fig. 2 shows an embodiment of a laminating film with an order of the layers corresponding to the structure of the hot stamping film. It comprises a so-called overlay film 30, a laser-sensitive layer 40, an intermediate layer 50 forming a background layer, which is optional, and an adhesive layer 60, which is also optional.
• the laser-sensitive layer 40 is arranged in a corresponding manner like the laser-sensitive layer 4 on both sides of the reflection layer 50r, in a corresponding manner as in FIG.
• the two laser-sensitive layers are designed differently or identically.
• a diffraction and / or hologram structure 50b is also provided in the laminating film in FIG. 2, likewise in the area of the two laser-sensitive layers 40 and the reflection layer 50r in between.
• laser-induced image components which are present in different layers, are produced in the laser-sensitive layers lying one on top of the other.
• the laser treatment is preferably carried out after the film in question has been applied to the substrate, ie by irradiating the film applied to the substrate from the outside.
• the film it is also possible for the film to be laser-treated before being applied. In this case, the laser irradiation can take place from different sides of the film.
• Different laser-induced image components in the superimposed laser-sensitive layers are obtained in that the laser-sensitive layers have different laser-sensitive material and thus the laser-induced under different material-specific laser conditions Components can be generated in the different laser-sensitive layers.
• the upper laser-sensitive layer can be treated separately by appropriately adjusting the angle of incidence of the laser radiation in order to generate a specific laser-induced image component there without the radiation reaching the lower laser-sensitive layer.
• two laser-sensitive layers 4, 4a are also provided. However, these are separated from one another by a background layer 5 arranged between them.
• the background layer is a layer which is highly reflective for the laser radiation used in laser treatment.
• the layer is not transparent and absorbent with regard to the non-reflected portion of the laser radiation, so that during laser treatment to generate the laser-induced marking in the upper laser-sensitive layer 4, no laser radiation enters the laser-sensitive layer 4a underneath.
• the background layer 5 is arranged under the laser-sensitive layer 4 exclusively in the area in which a laser-induced image component is to be generated in the laser-sensitive layer 4.
• the background layer 5 is not formed, ie in this area there is a for the laser radiation-permeable material or preferably the laser-sensitive material of the lower laser-sensitive layer 4a is arranged. In those areas in which the background layer is not formed, the laser-induced image component can be generated in the lower laser-sensitive layer 4a by laser irradiation.
• the two laser-sensitive layers 4, 4a are preferably formed from different laser-sensitive material, for which different material-specific laser treatment conditions apply. In this way, it is also possible that a laser-induced change in the upper laser-sensitive layer 4 does not take place simultaneously in the lower laser-sensitive layer 4a during the generation of the laser-induced marking.
• a further background layer 5a is arranged on the underside of the lower laser-sensitive layer 4a. This background layer 5a prevents laser radiation from reaching the substrate during the laser treatment.
• the upper overlay film 4 is a body laminated from various overlay foils and inlets.
• the upper overlay film has a layer structure on its underside, consisting of a lacquer layer 5c, a reflection layer 5r, a laser-sensitive layer 4, a background layer 5 and an adhesive layer 6.
• a lacquer layer 5c the reflection layer 5r and the laser-sensitive layer 4 there is a diffraction - And / or hologram structure 5b formed.
• the overlay film 32 arranged under the overlay film 30 is designed as a laser-sensitive film. It therefore forms a second laser-sensitive layer.
• the laser-sensitive material is designed as carbon and / or soot-doped material. It is material which carbonizes when exposed to laser, so that a laser-induced image component is blackened in this layer formed by the overlay film 32.
• a grayscale image can be generated by varying the laser conditions, for example varying the laser power and / or laser wavelength.
• An inlet 90 is arranged below the doped overlay film 32 and a further inlet 90 below it. These inlets can preferably be made of paper material, but also of plastic material, preferably as inlet foils.
• An overlay film 30 is applied to the underside of the lower inlet 90 and a further overlay film 30 is applied thereon.
• the laser treatment for generating the different laser-induced image components in the laser-sensitive layers 4 and 32 takes place in exemplary embodiments in a manner corresponding to that in FIGS. 1 to 3.
• a full-color image component can be produced in a laser-sensitive layer, which consists of a colorant mixture of three laser-sensitive colorant components, by laser-induced bleaching.
• the laser-sensitive material is a three-component mixture with a cyan pigment component, a magenta pigment component and a yellow pigment component.
• a blue or green or red color marking is produced by irradiating this area with a specific laser wavelength with which a specific pigment component is bleached.
• this point is laser-treated in a second step, with a laser wavelength with which one of the pigment components not yet bleached at this point is bleached. If a blue color marking was created in the first step, the cyan pigment component and the magenta pigment component are unbleached at this point. In order to produce the color cyan at this point, the magenta pigment component must be bleached in this second step. This is done with green laser light. This results in a cyan marking at this point.
• magenta-colored marking is to be obtained in the second step instead of this cyan-colored marking
• the blue color marking generated in the first step must be treated with red laser light. This bleaches the cyan pigment at this point, leaving the magenta pigment unbleached at this point. This results in the magenta marking at this point.
• a green color marking generated in the first step which is formed from the unbleached cyan pigment and yellow pigment remaining there, can be used to produce a cyan marking or a yellow marking, by treatment with blue laser light or red laser light.
• a red color marking generated in the first step can be converted into a yellow or magenta colored marking in the second step, by laser treatment in the second step with green laser light or blue laser light.
• this spot In order to obtain a transparent area at the point treated in the first and second step, i.e. To obtain a white spot when the background layer 5 is white, in a third step this spot must be treated with a laser beam whose wavelength is set in such a way that the pigment component remaining unbleached at this point after the second step is bleached, i.e. the yellow color marking must be bleached with blue laser light, the magenta colored marking with green light and the cyan colored marking with red laser light.
• Laser treatment can also be used to generate color markings or a full-color image in the colorant or the colorants in the laser-sensitive layer by color change.
• the laser treatment can be carried out in a corresponding manner with successive process steps.
• Pigments can be used as colorants, ie coloring substances. These are mostly insoluble and are usually inorganic substances. However, soluble, organic colorants are also usually suitable as colorants. The color change occurs in each case under specific laser conditions, which are then used in the laser treatment in the individual steps.
• the bleaching and color conversion process described can also be used if the laser-sensitive material consists of only one or two colorant components.
• Other colorant components and also other laser conditions, in particular other laser wavelength ranges, can also be used in the laser treatment.
• the laser treatment is usually carried out on the film applied to the substrate. Alternatively, however, it can also take place before the film is applied by irradiating the film alone, in particular when the protective layer 3 or some other layer, for example a background layer 5, is used as a layer which is not or only partially transparent for laser radiation or one for laser radiation certain wavelength range non-transparent layer is formed or an additional UV-absorbing protective layer is provided.
• the laser treatment then takes place, preferably before the film is applied, by placing the laser beam on the back of the film, ie on the lower one Background layer 5 or the adhesive layer 6 is directed and thus the laser-sensitive layer 4 is thus treated from the other side in order to generate the color markings in the same way.
• the background layer 5 and the adhesive layer 6 are transparent or at least partially transparent for the laser radiation in question.
• Extender (aluminum silicate) 4.0 parts
• Laser-sensitive layer 4 (first colored lacquer layer):
• Linear polyurethane (mp.> 200 ° C) 3.5 parts
• High molecular weight dispersing additive (40%, amine number 20) 2.0 parts e.g. Pigment Blue 15: 4 0.5 parts
• Dispersing additive (50%, acid number 51) 1.0 part
• Titanium dioxide (d 3.8-4.2 g / cm 3 ) 26.0 parts
• Adhesive layer 6 is Adhesive layer 6
• Methacrylate copolymer (Tg: 80 ° C) 5.0 parts Unsaturated polyester resin (softening point 103 ° C) 3.5 parts
• a multi-layer data carrier is created which contains at least two different laser-sensitive layers, one laser-sensitive layer 1 preferably being laser-personalizable in multiple colors and another laser-sensitive layer 2 preferably being monochrome laser-personalizable.
• the laser-sensitive materials can be set in such a way that a marking can be achieved in both materials by means of laser radiation of a defined wavelength and intensity.
• the laser-sensitive layers are preferably superimposed over part of the area.
• This optical barrier layer 3 is a reflective layer, in a preferred embodiment a diffusely reflective layer. It preferably contains a sufficient proportion of white pigment and thus prevents the laser light from penetrating into the layers below. This is the prerequisite for the arrangement according to the invention of the different laser-personalizable layers.
• the multi-colored laser-personalizable layer 1 can lie above the monochrome laser-personalizable layer 2 without the color laser personalization there is an unintentional carbonization in the underlying monochrome laser-personalizable layer 2.
• the optical barrier layer can be installed as an additional layer in various ways.
• the optical barrier layer is preferably applied to one of the cover layers in decorative printing.
• the multi-layer data carrier described can be produced using one of the following methods:
• Injection molding process preferably multi-component injection molding or in-mold
• Foil transfer process on paper or plastic carriers or a combination of the methods mentioned.
• FIG. 1 shows a preferred structure of a data carrier.
• the optical barrier layer can also be arranged above the laser-sensitive layers and thus cause partial coverage of the laser-sensitive layers.
• This optical barrier layer is then preferably designed as a decorative print, preferably in the form of line patterns such as guilloches.
• the image information of the decor print is then, after the laser personalization, into the laser-personalizable layers transmit that here the laser-personalized image information is interrupted by the image information of the optical barrier layer.
• color laser personalization and laser personalization in grayscale in a data carrier takes place in such a way that the different laser-personalizable layers are only partially superimposed on one another. This results in different options for integrated color laser personalization.
• FIG. 6 shows the possibilities of laser marking on a preferred structure of a data carrier.
• the laser personalization takes place at the point where only the multi-colored layer 1 that can be personalized by laser is not above that for the laser radiation permeable layer 3 and lies above the monochrome laser-personalizable layer 2, a multicolored marking 8 is generated.
• FIG. 7 shows how integrating picture elements can be achieved by combining laser personalization in color with classic grayscale lasering.
• the absorption of the laser-personalizable layers is set such that the laser power required for bleaching is sufficient to carbonize in the monochrome laser-personalizable layer additionally used in the document.
• the monochrome laser-personalizable layer 2 lies under the multi-color laser-personalizable layer 1 and if this is only partially covered by the optical barrier layer 3, this structure allows image elements such as lines or alphanumeric characters which are lasered beyond the boundary of the optical barrier layer 3, cause the background to carbonize. In this way, continuous image elements can be generated by changing the type of marking within the element.
• Integrating image elements are also possible, which are achieved by combining laser personalization in color with other graphic elements.
• the transparency of the multi-color laser-personalizable layer increases with increasing bleaching.
• layout elements such as guilloches, which are printed on layers below the multi-color laser-personalizable layer, for example on the core material, to appear in the color image after the color laser.
• picture elements such as printed lines, which are only partially covered by the multi-colored laser-personalizable layer 1, appear as integrating elements after the color laser personalization. Integrating elements such as these, which extend over the edge of a personalized feature, make it very difficult to falsify the data carrier.
• the additional layer allows a targeted adjustment of the brightness of the background, regardless of the carrier material used.
• an additional effect can be achieved by using optical brighteners or by using pigment additives.
• the subject of the invention is a multi-layer data carrier which contains at least two different laser-sensitive layers, one laser-sensitive layer being laser-personalizable in multiple colors and another laser-sensitive layer being monochrome laser-personalizable. These laser-sensitive layers are superimposed over part of the area, and preferably the multi-color laser-personalizable layer lies over the monochrome laser-personalizable layer.
• the laser-sensitive layers can be designed such that in a laser marking step with the same wavelength and energy Laser radiation can be achieved in both the multicolor laser-personalizable layer and in the monochrome laser-personalizable layer.
• a layer which is not transparent to the laser radiation is preferably arranged at least over part of the area between these laser-sensitive layers.
• the layer which is not transparent to the laser radiation is preferably a reflective layer, which in a preferred embodiment can be a diffusely reflective layer and contains a sufficient proportion of an additive which reflects or scatters the laser light.
• the laser personalization can take place in an upper laser-personalizable layer, preferably in a multi-color laser-personalizable layer, without a laser-personalizable layer lying below this layer being changed by the laser radiation, in that the laser personalization takes place where the laser-sensitive layers are provided by a layer that is not transparent to the laser radiation are optically separated from each other.
• Laser personalization can be carried out with a laser beam both in an upper laser-personalizable layer, preferably in a multi-color laser-personalizable layer, and in a laser-personalizable layer lying below this layer, in that the laser personalization takes place where the laser-sensitive layers are not transparent to the laser radiation Layer are optically separated.
• the laser personalization can be carried out with a laser beam both in an upper laser-personalizable layer, preferably in a multi-color laser-personalizable layer, and in a laser-personalizable layer lying below this layer, in that the laser personalization takes place in such a way that graphic image elements over the partial areas of the respective laser-personalizable Layer, preferably the multi-colored laser personalizable layer, are arranged so that a change from multi-colored to monochrome is achieved within the picture element.
• the laser personalization can be carried out with a laser beam in a laser-personalizable layer, in that the laser personalization takes place in such a way that graphic image elements are arranged beyond the partial areas of the optical barrier layer arranged above the laser-personalizable layer, so that an interruption of the so in the laser-personalizable layer generated graphic picture elements is achieved.
• Printed elements such as guilloches, can preferably be arranged above the laser-personalizable layer as interrupting elements in the sense of an optical barrier layer.
• the laser personalization can be carried out with a laser beam in a multi-color laser-personalizable layer, so that design elements, preferably printed elements such as guilloches, which are printed on layers below the multi-color laser-personalizable layer, for example on the carrier material, appear after the color laser in the color image, by increasing the transparency of the multi-colored laser-personalizable layer through the process of laser marking.
• design elements preferably printed elements such as guilloches, which are printed on layers below the multi-color laser-personalizable layer, for example on the carrier material
• An important advantage of the invention is that the known laser personalization in gray levels is combined with the new method of color laser personalization. The security of documents can be significantly increased by the combination in the manner described.

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• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Physics & Mathematics (AREA)
• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Toxicology (AREA)
• Optics & Photonics (AREA)
• Electromagnetism (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Thermal Transfer Or Thermal Recording In General (AREA)
• Photoreceptors In Electrophotography (AREA)
• Credit Cards Or The Like (AREA)
• Inspection Of Paper Currency And Valuable Securities (AREA)
• Heat Sensitive Colour Forming Recording (AREA)

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• 2002
  • 2002-05-08 RU RU2004116691/11A patent/RU2296378C2/ru not_active IP Right Cessation
  • 2002-05-08 AT AT02742734T patent/ATE381445T1/de active
  • 2002-05-08 WO PCT/DE2002/001675 patent/WO2003039888A1/de active IP Right Grant
  • 2002-05-08 JP JP2003541954A patent/JP4018632B2/ja not_active Expired - Fee Related
  • 2002-05-08 EP EP02742734A patent/EP1439964B8/de not_active Expired - Lifetime
  • 2002-05-08 CN CNB02825998XA patent/CN100349754C/zh not_active Expired - Fee Related
  • 2002-05-08 DE DE50211413T patent/DE50211413D1/de not_active Expired - Lifetime
  • 2002-05-08 ES ES02742734T patent/ES2298375T3/es not_active Expired - Lifetime

Patent Citations (11)

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