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EP2252470B1 - Couche d'impression comprenant des pixels principaux et des pixels satellites sur un composite polymère stratifié pour un document de sécurité et/ou de valeur - Google Patents

Couche d'impression comprenant des pixels principaux et des pixels satellites sur un composite polymère stratifié pour un document de sécurité et/ou de valeur Download PDF

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Publication number
EP2252470B1
EP2252470B1 EP08872939.7A EP08872939A EP2252470B1 EP 2252470 B1 EP2252470 B1 EP 2252470B1 EP 08872939 A EP08872939 A EP 08872939A EP 2252470 B1 EP2252470 B1 EP 2252470B1
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EP
European Patent Office
Prior art keywords
pixels
satellite
security
print
pixel
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.)
Active
Application number
EP08872939.7A
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German (de)
English (en)
Other versions
EP2252470A1 (fr
Inventor
Oliver Muth
Manfred Paeschke
Arthur Mathea
Edward Springmann
Jörg Fischer
Malte Pflughoefft
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bundesdruckerei GmbH
Covestro Deutschland AG
Original Assignee
Bundesdruckerei GmbH
Covestro Deutschland AG
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Publication of EP2252470A1 publication Critical patent/EP2252470A1/fr
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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
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D25/46—Associating two or more layers using pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • 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
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/21—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose for multiple purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F1/00—Designs or pictures characterised by special or unusual light effects
    • B44F1/08—Designs or pictures characterised by special or unusual light effects characterised by colour effects
    • B42D2035/14—
    • B42D2035/50—
    • 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

Definitions

  • the present invention relates to a polymer layer composite for a security and / or value document and to a method for its production. Furthermore, the invention relates to a security and / or value document which can be produced from the polymer layer composite according to the invention, for example by welding the composite into transparent protective films. Moreover, the invention relates to the use of the security and / or value document as identity card, passport, credit card, bank card, cash card, customer card, Visa card, ID card or driver's license.
  • Card-shaped data carriers are used, for example, for the identification of persons and / or objects and / or for cashless payment transactions. You have u.a. visually identifiable features that they clearly assign to a person and / or an item and / or a money or securities account and only allow the owner to identify himself or to dispose of the item or account and arrange for money transfers. For this reason, these data carriers must have security features that make it virtually impossible for unauthorized persons to falsify or falsify the cards, so that abuse can be prevented as much as possible. In addition, a fake should therefore be easily recognizable.
  • Essential security features in the card-shaped data carriers are personalized and / or individualized features that are stored in the data carrier.
  • Personalized features are, for example, passport photos and data of the person to whom the card is associated, such as date of birth, address or identification number in a company, as well as biometric data such as a digitized record of fingerprints or the size, or the person's eye color or affiliation health insurance.
  • Individualized features are data associated with a particular device such as a motor vehicle, a bank account, or a security.
  • Such personalized and / or individualized features are applied individually to the card-shaped data carriers for the person using them. Therefore, the process for their generation must be flexible.
  • methods and apparatus for applying such data to card-shaped data carriers are known in the art US 6,022,429 A . US 6,264,296 B1 . US 6,685,312 B2 . US 6,932,527 B2 . US Pat. No. 6,979,141 B1 and US 7,037,013 B2 , wherein the personalized and / or individualized features can be applied to the cards, inter alia, by means of inkjet printing technology.
  • EP 0 384 274 A2 a method for producing a multi-layer ID card is described in which security-specific data are introduced with an ink-jet printing process.
  • the point overlap compensated error diffusion method is used.
  • the compensation of the point overlap depends on the point size and the dot shape.
  • satellite pixels may be generated in addition to the main printing pixels produced in printing. Such satellite pixels are avoided at a pressure to produce a perfect print image.
  • droplet formation not only forms a uniform droplet, but occurs depending on the ink properties and the conditions under which the droplets are formed (for example, the flank shape of the droplet ejection from the pressure nozzle determining electrical signal to drive the nozzle; or bubble jet actuator), more or less long "drop tails" whose velocity is smaller than that of the leading drops and from which therefore further successive satellite drops can form ( H.Wijshoff in: "Drop formation mechanisms in piezo-acoustic inkjet", available at http://www.flow3d.com/pdfs/tp/micro_tp/FloSci-Bib01-07.pdf on 8.2.2008 ).
  • a method for encoding a primary image with a secondary image in which the primary image and the secondary image are rasterized.
  • the secondary image is hidden in the primary image by being compensated for with its own inverse representation.
  • a coding method is used in which the points of the rasterized primary image can be modified or changed so that the balanced secondary image in the primary image is invisible.
  • the points in the primary image are grouped and the information of the secondary image is fed into these point groups.
  • Such variations may be in the density, shape and shape, angle, position, size, or frequency of the individual points in the point groups.
  • variable graphic elements in particular alphanumeric characters, images, barcodes, specified in value and security documents
  • at least the surfaces of the variable graphic elements are provided with microscopic fine structures and in which between spectral and / or geometric properties of the structures in terms of color and pattern and the variable graphic elements to be protected a defined context in the form of a code is made.
  • a color information of the graphic structure is proposed as a security feature.
  • color codes can be defined for alphanumeric characters, which recur in the structures of the individual elements.
  • the letter "c" is changed on the letter surface by picking up a c-shaped strip, which is a protective structure.
  • the letter is assigned a color identical to the color of the protective structure in the "c".
  • High-quality card-shaped data carriers today consist in particular of polycarbonate.
  • Personalization and / or customization of polycarbonate-based cards typically takes place by laser engraving.
  • a laser beam is focused into the material and guided over the material.
  • the laser beam produces pungencies in the interior through pyrolysis, which vary in intensity depending on the laser intensity and duration at the respective points.
  • an image or other graphics or even a lettering or a number and / or letter combination can be generated.
  • the present invention is based initially on the problem that a layer composite with personalized and / or individualized features that have been produced by printing, may be delaminated or split by unauthorized manipulation, so that it is desirable to find a method with this is certainly prevented.
  • print reproduction which is structured in some way and a print reproduction over the entire surface.
  • Structured print reproduction can be, for example, an image, such as a passport photograph, or a graphic print reproduction, for example guilloches or a background screening, or alphanumeric Characters or a one-dimensional or two-dimensional barcode or emblem, coats of arms, national emblems or any other print reproduction.
  • Pixel means the smallest possible element in printing a rasterized image. Pixels usually have simple geometric shapes, such as circles or squares. In ink-jet printing, usually circular or circular shapes are generated which are defined by the ink spot spreading in the printing medium. The entirety of all pixels of an image forms a representation in their relative arrangement to one another.
  • the term "satellite pixel” is to be understood as an ink stain on the print medium which, in a drop-dot based printing process, under certain conditions, in addition to the actual main ink spot, the main pixel.
  • a satellite pixel is associated with a main pixel and therefore has a close spatial relationship with it.
  • the satellite pixel is typically very close to the main pixel and may ideally merge with it or be separated therefrom if additional satellite pixels are to be generated and the satellite pixels are formed at a greater distance from the main pixel.
  • Satellite pixels are characterized, inter alia, by being in a fixed geometric relationship relative to the main pixels to which they are associated, for example by always being on the connecting line between adjacent main pixels or appearing at a certain angle to that connecting line, if not spattering of printing ink, which statistically produce ink stains. If the printing direction (relative direction of movement between the printing head and the printing medium) is reversed, this angle is also mirrored on a perpendicular to the printing direction.
  • certain print pixels composed of main pixels and satellite pixels are in a first spatial orientation and other pixels, for example in a different color and / or size, in one varying geometric relationship.
  • main and satellite pixels in adjacent main pixel satellite pixel ensembles may also be arranged in a different geometric arrangement relative to one another, wherein only ensembles with the same geometric orientation occur within a group.
  • adjacent ensembles can also appear in different geometric orientations, provided that they belong to different groups.
  • An essential feature of satellite pixels is that they are typically smaller than the major pixels to which they are associated.
  • digital printing method is to be understood as a printing method in which the data required for imaging digitally created and printing directly, as in the inkjet printing process, or indirectly, as in a xerographic printing process can be used to produce the printed image without the need for an explicit printing plate.
  • This is a non-impact printing process, i. a method in which no solid printing form (a printing cylinder or a stamp) is used.
  • a polymer layer composite for a security and / or value document for example for a credit card, bank card, cash card, customer card, visa card, ID card or driver's license, passport, identity card, is proposed according to the invention, which comprises at least two having cohesively interconnected polymer layers, wherein on at least one surface of at least one of the polymer layers each consisting of printing pixels pressure layers are formed in a pressure range.
  • the print pixels each consist of a main pixel and at least one satellite pixel assigned to the main pixel.
  • Such a polymer layer composite is produced according to the invention using the following method steps: (a) providing the polymer layers for the polymer layer composite; (b) forming respective print layers of print pixels on at least one surface of at least one of the polymer layers in a print area; In this case, the print pixels are each formed from a main pixel and at least one satellite pixel associated with the main pixel; and (c) bonding the polymer layers together.
  • the starting point of the present invention is the recognition that novel security features in security and / or value documents can be generated if pixel-oriented printing methods are used and the individual screen dots of a screened representation, in particular of personalized and / or individualized features, are modified in such a way that respectively a main pixel and satellite pixels associated therewith are generated.
  • the entire representation is then preferably composed of main pixels and associated with them satellite pixels.
  • pixel-oriented printing methods in particular the inkjet printing method, are set up such that the respectively printed pixels have the most reproducible shapes, areas and color densities.
  • the print is optimized so that no satellite pixels form.
  • Each printing pixel then ideally consists of a circular surface. Therefore, the presence of satellite pixels, in addition to the main pixels to which they are associated, constitutes a security feature in the security and / or value document. Thus, if no such satellite pixels are detected in a security and / or value document, even though the standard document is printed with such pixel shapes it is easy to identify a forgery or falsification.
  • satellite pixels are smaller than the main pixels to which they are assigned.
  • the relative diameter of the two pixel types reference is made to the above definition.
  • each generated main pixel in the representation may be associated with a single satellite pixel.
  • the rising edge of the actuator piezoelectric crystal, resistance heating in the bubble jet inkjet printer
  • the single ink drops are ejected from the print head. This is because the main part of a drop is ejected from a discharge port in the print head at a high speed, but a smaller part still leaks when the discharge operation is actually already completed and the meniscus of the ink liquid in the discharge port is already starting to retire ( "fill-before-fire action").
  • the security feature that can be produced with the invention can be realized in an arbitrarily designed representation: It can be structured, such as an image, for example a passport photograph, or as a graphic, such as guilloche, or as a raster, in particular a background raster (for example diamond, hahentritt -, pepita-, herringbone, checkerboard-shaped screening), or as alphanumeric characters, for example for the representation of personalized data of the holder or the marked object (for example motor vehicle), or as a barcode or as an emblem, coats of arms, insignia, a flag, a test mark, warranty, seal.
  • the representation can also be just a uniformly colored surface without structure, such as a white, black, gray or somehow colored surface.
  • all or only certain, uniquely identifiable groups of print pixels can be embodied as main pixel satellite pixel ensembles.
  • all print pixels that are not black may be provided with satellite pixels.
  • the present invention relates to a composite of polymer layers, which may optionally also contain layers of other materials, such as cardboard, paper, textiles, fabrics, knitted or prepregs, for the production of security and / or value documents.
  • the polymer layers can, identically or differently, be based on a polymer material from the group comprising PC (polycarbonate, especially bisphenol A polycarbonate), PET (polyethylene glycol terephthalate), PMMA (polymethyl methacrylate), TPU (thermoplastic polyurethane elastomers), PE (polyethylene), PP (Polypropylene), PI (polyimide or poly-trans-isoprene), PVC (polyvinyl chloride) and copolymers of such polymers. Furthermore, coextruded films of these materials can be used.
  • PC polycarbonate, especially bisphenol A polycarbonate
  • PET polyethylene glycol terephthalate
  • PMMA polymethyl methacrylate
  • TPU thermoplastic polyurethane elastomers
  • PE polyethylene
  • PP Polypropylene
  • PI polyimide or poly-trans-isoprene
  • PVC polyvinyl chloride
  • low-T g polycarbonate-based materials are polymers whose glass transition temperature is below 140 ° C.
  • the polymer layers can be filled or unfilled.
  • the filled polymer layers contain in particular color pigments or other fillers.
  • the polymer layers may also be dyed with dyes or colorless and, in the latter case, transparent, translucent or opaque.
  • the base polymer of at least one of the polymer layers to be joined contains identical or different mutually reactive groups, wherein react at a laminating temperature of less than 200 ° C reactive groups of a first polymer layer with each other and / or with reactive groups of a second polymer layer.
  • the lamination temperature can be lowered without jeopardizing the intimate bond of the laminated layers.
  • this is due to the fact that the various polymer layers can no longer be readily delaminated due to the reaction of the respective reactive groups. Because between the polymer layers takes place a reactive coupling, as it were a reactive lamination.
  • the glass transition temperature T g of the at least one polymer layer before the thermal lamination is less than 120 ° C. (or even less than 110 ° C. or less than 100 ° C.). is, wherein the glass transition temperature of this polymer layer after the thermal lamination by reacting reactive groups of the base polymer of the polymer layer with each other by at least 5 ° C, preferably at least 20 ° C, higher than the glass transition temperature before the thermal lamination. In this case, not only is a reactive coupling of the layers to be laminated together.
  • the lamination temperature when using such polymer materials less than 180 ° C, more preferably still less than 150 ° C.
  • suitable reactive groups is readily possible for a person skilled in the art of polymer chemistry.
  • the reactive groups may be attached directly to the base polymer or linked to the base polymer via a spacer group.
  • Suitable spacer groups are all spacer groups known to the person skilled in the art of polymer chemistry.
  • the spacer groups may also be oligomers or polymers which impart elasticity, whereby a risk of breakage of the security and / or value document is reduced. Such elasticity-promoting spacer groups are known to the person skilled in the art and therefore need not be further described here.
  • base polymer in the context of the above statements designates a polymer structure which does not bear any groups reactive under the lamination conditions used. These may be homopolymers or copolymers. Compared to the polymers mentioned also modified polymers are included.
  • the present invention serves to produce security features in security and / or value documents.
  • the security features may in particular be personalized and / or individualized features.
  • the personalized feature may in particular be a passport photograph.
  • a personalized feature can also include data of the person to whom the security and / or value document is assigned, for example the date of birth, the address or identification number in a company, as well as biometric data, such as a digitized record of fingerprints, or the size, eye color of the person or their affiliation to a health insurance company.
  • an individualized feature may represent data pertaining to a particular item, such as a motor vehicle, or to a particular entity, such as a bank account or a security.
  • the personalized and / or individualized feature in turn is changed by the formation of the individual print pixels in the main pixels and satellite pixels as another security feature. That despite the change, the printed image can be seen with the naked eye, while it can be seen, given a corresponding optical magnification, that the individual printing pixels are formed as ensembles of main pixels and satellite pixels.
  • the particular grid structure according to the invention with main pixels and satellite pixels is preferably realized with a digital printing method (non-impact printing), more preferably with a drop-on-demand printing method, and most preferably with an ink-jet printing method. If an inkjet printing process is used, ensembles of main and satellite pixels can be set by simply adjusting the printing process be generated. In other cases, these ensembles are merely simulated. In principle, therefore, all printing methods can be used with which such ensembles can be simulated in a screened representation of the individual picture elements (pixels).
  • the printing method used achieves a sufficient resolution in order to be able to produce the picture elements composed of main and satellite pixels in addition to a conventional image composed of picture elements in the form of a sufficiently high quality image.
  • the following printing methods are also basically applicable: conventional printing methods, such as wet and dry offset and other planographic printing, gravure, high-pressure, but also electrophotographic or thermographic process.
  • digital printing methods in addition to the ink-jet printing method, for example, xerographic methods, preferred because they are very flexible, in particular for the production of personalized and / or individualized pattern.
  • the pattern is formed with an ink jet print head on one of the surfaces, the pattern being subdivided into pixels, and at least a portion of these pixels consisting of main and satellite pixels in the sense of the invention.
  • each satellite pixel is relative to a respective main pixel to which it is assigned at a predetermined angle ⁇ to the direction in which the inkjet printhead and the surface are moved relative to each other (printing direction) on the surface generated. This means that the satellite pixels, when viewed from the surface after printing, are arranged in a specific orientation to the associated main pixels, for example in the "5 o'clock position" or in the "half-o'clock position".
  • said angle ⁇ is not 0 ° or 180 °, relative to the printing direction.
  • the satellite pixels would lie on the connecting lines of main pixels which are successively printed in the process (scanning) of the print head and the print medium relative to each other.
  • Such orientation would typically result in conventional ink jet printing, even though there are no particular devices to suppress satellite pixels, because the satellite drops are later due to their lower exit velocity from the print head exit ports than the main drop hit the print medium and impinge on the connecting line successively printed main pixels because of the now made offset in the process of the printhead next to the main pixel.
  • a satellite drop might appear to the right or left of the main pixel.
  • the satellite pixel would always appear behind the main pixel, taking into account the direction of travel of the printhead.
  • the satellite pixels are not printed on the connecting lines, but above or below the connecting lines.
  • Such an orientation can only be established if specific measures have been taken to specifically divert the satellite drops at an angle ⁇ with respect to a plane defined by the respective main pixel and the printing direction.
  • each satellite pixel irrespective of the printing direction relative to the respective main pixel to which it is associated, may be formed at a predetermined angle ⁇ to a connecting line of adjacent printed major pixels on the surface.
  • a device for deflecting the satellite drops emerging from the print head is provided on the print head.
  • This device may, in particular, be a through-opening device, which is arranged directly adjacent to the outlet openings of the print head.
  • the portion of the intervening liquid which ultimately forms the satellite pixels passes at an angle ⁇ to a plane passing through the respective main pixel and the printing direction is defined, off.
  • This part of the ink liquid is formed by the tail of the ejected ink liquid whose airspeed is lower than the part of the ink liquid at the head of the ejected liquid stream and forming during the flight to the main droplet.
  • the device for deflecting the satellite drops can, as in US 7,093,915 B2 or US 2003/0179258 A1 formed by a through-hole plate, which is brought into direct contact with the part of the print head in contact, in the the outlet openings for the ink liquid are located.
  • the passage openings in this plate are inserted in register with the outlet openings in the printhead in the plate.
  • the plate is not mounted on the print head so that the outlet openings are aligned with the through holes, but such that there is a small offset, so that although there is a free cross section for the passage of the ink liquid, but this cross-section is narrowed.
  • the tail of the fluid path receives a pulse parallel to the plane of the plate so that the satellite drop forming from the tail is deflected from the original exit direction in which the bulk of the ink fluid is expelled. become.
  • the main drop maintains the exit direction defined by the normal to the plane defined by the exit ports of the printhead.
  • the passage openings in the plate are indeed adjusted in register with the outlet openings in the print head.
  • these through-holes are designed in a special way, in such a way that the trajectory of the satellite drop is deflected, for instance through through-holes with a curved, S-shaped or otherwise specially designed profile.
  • a predetermined color ⁇ at which a satellite pixel is generated relative to the main pixel to which it is associated is assigned a particular color.
  • the main pixel and the associated satellite pixel are generated according to this embodiment at this angle ⁇ and printed in this color associated with the angle ⁇ .
  • Another security feature is available. This security feature is that a particular color is associated with a particular orientation of a satellite pixel relative to the main pixel to which it is associated, and that the main and satellite pixels are also printed in that color. A forgery or falsification occurs when such a shaped printing pixel is not printed in the associated color.
  • a plurality of predefined angles ⁇ 1 , ⁇ 2 ,..., ⁇ n ,... Below which satellite pixels are generated relative to the respective main pixels to which they are associated are each assigned a specific color be.
  • the main pixel and the associated satellite pixels are generated under the respective angles ⁇ n and printed in this angle ⁇ n associated color.
  • a pattern may include printing pixels that appear at the 1 o'clock position, 4 o'clock position, 7 o'clock position, and 10 o'clock position on the printed surface, relative to the associated main pixels ,
  • the respective orientations are assigned specific colors, such as the colors of the CMYK color space, for example the 1 o'clock position of the color yellow, the 4 o'clock position of the color magenta, the 7 o'clock position of the color cyan and the 10 o'clock. Clock position of the color "Black”.
  • a representation which consists of pixels, each consisting of main and satellite pixels, wherein at least individual pixels are printed in a color that does not correspond to the respective associated orientation of the satellite pixels to their associated main pixels, so for example Printing pixel with satellite pixels in 7 o'clock position in yellow, the document proves to be fake or as falsified.
  • the main pixels and the associated satellite pixels are generated in this case at the respective angle ⁇ n and on this surface associated with the angle ⁇ n .
  • the print pixels are printed on each surface with a different orientation of the satellite pixels to the associated main pixels, for example on the first surface with satellite pixels in the 2 o'clock position, on the second surface in the 5 o'clock position, on the third surface in 8 o'clock position and on the fourth surface in 11 o'clock position. If it turns out that in a document with such coding of the pixels with colors an incorrect assignment takes place, it can be determined that this document is forged or falsified.
  • This embodiment is particularly advantageous when the different surfaces are spaced from each other by at least one layer of the composite, so that a distinction of the individual composite layers is made possible.
  • the representations in the above embodiment may be printed on the different surfaces in different colors.
  • multiple representations printed on different surfaces may be color separations of a color image.
  • the individual color separations according to the above embodiments of the invention can be provided with different orientations of the satellite pixels and color-coded.
  • the said security features may in principle be formed on a single surface of a layer of the composite layer, or it may be formed on different surfaces in the multilayer composite layers, these multiple surfaces are preferably separated from each other by at least one polymer layer and thus spaced from each other, and wherein the layers of the layer composite are joined together such that the representations of all printed layers, for example color separations of a photo, preferably lie exactly above one another on the different surfaces.
  • polymer layers which are colorless and transparent in order to be able to visually visually recognize the printed layers in the different layers of the layer composite from the outside.
  • a suitable representation for example a passport picture
  • a division of the fields on two surfaces can be made such that the first, third, fifth ... field of successive in a row Fields in the representation on a first surface and the second, fourth, sixth, ... field on a second surface and the corresponding fields of further rows, for example offset from the adjacent rows, are distributed in the same way to the two surfaces.
  • the result is a spatial impression of the representation, which is the more the more printed layers on different surfaces in the laminate are included in this representation. Furthermore, it is also possible to produce different color separations of the representation and to print the color separations on different surfaces in the layer composite so that the desired colored representation results when the individual polymer layers are combined to form the layer composite.
  • a further printing layer can also be applied, this further printing layer being printed on a surface which is modified in partial regions, for example with a screen or other type of pattern. Screening or other patterning in the modification of the surface is performed in this embodiment by changing the surface energy of the surface to be screened in partial areas corresponding to the grid, so that the ink liquid does not wet the surface in these partial areas. This change in surface energy may consist in hydrophilizing an otherwise hydrophobic surface or in hydrophobing an otherwise hydrophilic surface.
  • the portions of the surfaces in the printing areas may be modified by increasing their hydrophilicity, i. their tendency is increased to be wetted by water. This ensures that the ink is not absorbed during the printing process of the modified areas but rejected. Hydrophilization can be carried out, for example, by using reactive reagents on the surfaces in the subregions to be modified.
  • the surface can be provided with a raster-shaped printing with a raster reproducing this silicone stamp in microcontact printing process.
  • an aerosol writing method can also be used, for example the M 3 D® method from Optomec®, US. This is a maskless application method in which the reactive reagents are atomized with a sprayer, the generated aerosol is transported with a first gas stream to a nozzle and sprayed by means of a second gas stream focused on the surface sub-areas.
  • the surface may be contacted with the reactive reagents which react with and hydrophilize the material of the surface.
  • Such hydrophilic reagents may, in particular, be compounds which have at least one group reactive with the material of the polymer layers to be modified and at least one hydrophilic group.
  • Spacer groups may be provided between the reactive groups and the hydrophilic groups.
  • the reactive groups may, inter alia, be selected from the group comprising carboxylic acid chloride, carboxylic acid anhydride, Oxirane and phthalimide groups.
  • the portions of the surface to be modified may be provided with a hydrophilic coating, such as a hydrophilic paste or a hydrophilic dispersion. To impart adhesion of the paste or dispersion to the hydrophobic surface, the paste or dispersion contains, for example, a surfactant.
  • hydrophilic surfaces are rendered hydrophobic, for example by fluorination or siliconization, for example by applying a hydrophobic layer, for example a layer containing fluorinated binder components.
  • the structuring to produce the hydrophobic subregions can in turn be realized with a stamp in the microcontact printing process or with a drop-on-demand printing process or with a photolithographic process.
  • Polycarbonate layers can also be rendered hydrophobic.
  • diamond-shaped, triangular, square or hexagonal or also differently sized printing pixels can be produced.
  • a color can be assigned, for example, triangular pressure pixels of cyan, squared pressure pixels of the color magenta, hexagonal pressure pixels of the color yellow and diamond-shaped printing pixels of the color black .
  • any other pattern may be created as a secondary latent visible image superimposing the primary visible image, such as guilloches.
  • the security feature formed by the primary visible image and the secondary latent visible pattern may be generated in a print area other than the print area in which the security feature of the invention formed by print pixels with satellite pixels is created becomes.
  • the two pressure areas may preferably be on surfaces in the layer composite, which are separated from each other by at least one layer of the composite.
  • these two pressure ranges can overlap at least partially, so that overlapping partial images result in a common representation, for example a passport photograph.
  • different security features are realized in this case: first, in a first printing area, the security feature formed by additional satellite pixels at the associated main pixels, and in a second printing area, the security feature realized by the modification of the partial areas of the surfaces.
  • the generation of security features according to the invention by generating satellite pixels in addition to main pixels can also be combined with the above further embodiment, in which the surface is modified in subregions, in the same printing area and thus on the same surface of a polymer layer.
  • the primary visible print image is to be printed with satellites
  • the secondary latent visible information results in surface screening with grid areas that are larger than the areas of the print pixels.
  • the satellites are visible at the main pixels because the print pixels in the grid areas are substantially completely contained.
  • the presence of both the rasterization and the formation of the print pixels with main and satellite pixels represents further security features.
  • the above embodiments may also refer to a black / white representation, optionally with gray tones, instead of colored representations. These embodiments represent additional security features to the security features according to the invention and can be combined with these.
  • the respective printed layers are arranged in the polymer layer composite on inner layers of the composite. In this case is prevents or even precludes forgery or falsification of printed layers serving as security features.
  • diphenols of the formula (Ia) may also be mixed with other diphenols, for example with those of the formula (Ib) HO-Z-OH (Ib), be used for the preparation of high molecular weight, thermoplastic, aromatic polycarbonate derivatives.
  • Suitable other diphenols of the formula (Ib) are those in which Z is an aromatic radical having 6 to 30 C atoms, which may contain one or more aromatic nuclei, may be substituted, and aliphatic radicals or cycloaliphatic radicals other than those of the formula (II) Ia) or heteroatoms may contain as bridge members.
  • diphenols of the formula (Ib) are hydroquinone, resorcinol, dihydroxydiphenyls, bis (hydroxyphenyl) alkanes, bis (hydroxyphenyl) cycloalkanes, bis (hydroxyphenyl) sulfides, bis (hydroxyphenyl) ether, bis ( hydroxyphenyl) ketones, bis (hydroxyphenyl) sulfones, bis (hydroxyphenyl) sulfoxides, ⁇ , ⁇ 'bis (hydroxyphenyl) diisopropylbenzenes and their nuclear alkylated and nuclear halogenated compounds.
  • diphenols of the formula (Ib) are hydroquinone, resorcinol, dihydroxydiphenyls, bis (hydroxyphenyl) alkanes, bis (hydroxyphenyl) cycloalkanes, bis (hydroxyphenyl) sulfides, bis (hydroxyphenyl) ether, bis ( hydroxyphenyl) ketones, bis
  • Preferred other diphenols are, for example: 4,4'-dihydroxydiphenyl, 2,2-bis (4-hydroxyphenyl) propane, 2,4-bis (4-hydroxyphenyl) -2-methylbutane, 1,1-bis ( 4-hydroxyphenyl) cyclohexane, ⁇ , ⁇ - bis (4-hydroxyphenyl) -p-diisopropylbenzene, 2,2-bis- (3-methyl-4-hydroxyphenyl) -propane, 2,2-bis (3-chloro-4-hydroxyphenyl) -propane, bis (3,5-dimethyl-4-hydroxyphenyl) - methane, 2,2-bis (3,5-dimethyl-4-hydroxyphenyl) propane, bis (3,5-dimethyl-4-hydroxyphenyl) sulfone, 2,4-bis (3,5-dimethyl 4-hydroxyphenyl) -2-methylbutane, 1,1-bis (3,5-dimethyl-4-hydroxyphenyl) cyclohexan
  • diphenols of the formula (Ib) are, for example, 2,2-bis (4-hydroxyphenyl) propane, 2,2-bis (3,5-dimethyl-4-hydroxyphenyl) -propane, 2,2-bis- (3,5-dichloro-4-hydroxyphenyl) -propane, 2,2-bis (3,5-dibromo-4-hydroxyphenyl) -propane and 1,1-bis (4-hydroxyphenyl) -cyclohexane.
  • 2,2-bis (4-hydroxyphenyl) propane is preferred.
  • the other diphenols can be used both individually and in a mixture.
  • the molar ratio of diphenols of the formula (Ia) to the other diphenols of the formula (Ib) which may optionally be used should be between 100 mol% (Ia) to 0 mol% (Ib) and 2 mol% (Ia) 98 mol% (Ib), preferably between 100 mol% (Ia) to 0 mol% (Ib) and 10 mol% (Ia) to 90 mol% (Ib) and in particular between 100 mol% (Ia ) to 0 mol% (Ib) and 30 mol% (Ia) to 70 mol% (Ib).
  • the high molecular weight polycarbonate derivatives from the diphenols of the formula (Ia), optionally in combination with other diphenols, can be prepared by the known polycarbonate production processes.
  • the various diphenols can be linked together both statistically and in blocks.
  • the polycarbonate derivatives used can be branched in a manner known per se. If the branching is desired, this can in known manner by condensing small amounts, preferably amounts of 0.05 to 2.0 mol% (based on diphenols), of trifunctional or more than trifunctional compounds, especially those with three or more than three phenolic hydroxyl groups.
  • Some branching agents having three or more than three phenolic hydroxyl groups are phloroglucinol, 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) -heptene-2,4,6-dimethyl-2,4,6-tri - (4-hydroxyphenyl) heptane, 1,3,5-tri (4-hydroxyphenyl) benzene, 1,1,1-tri- (4-hydroxyphenyl) -ethane, tri- (4-hydroxyphenyl) -phenylmethane , 2,2-bis [4,4-bis (4-hydroxyphenyl) cyclohexyl] propane, 2,4-bis (4-hydroxyphenyl-isopropyl) -phenol, 2,6-bis (2-bis) hydroxy-5-methylbenzyl) -4-methylphenol, 2- (4-hydroxyphenyl) -2- (2,4-dihydroxyphenyl) -propane, hexa- [4- (4-hydroxyphenyl-isopropyl
  • Suitable compounds are, for example, phenol, tert-butylphenols or other alkyl-substituted phenols.
  • R represents a branched C 8 and / or C 9 alkyl radical.
  • R represents a branched C 8 and / or C 9 alkyl radical.
  • R represents a branched C 8 and / or C 9 alkyl radical.
  • R represents a branched C 8 and / or C 9 alkyl radical.
  • R represents a branched C 8 and / or C 9 alkyl radical.
  • R represents a branched C 8 and / or C 9 alkyl radical.
  • the proportion of CH 3 protons between 47 and 89% and the proportion of CH and CH 2 protons between 53 and 11%; also preferably R is in the o- and / or p-position to the OH group, and more preferably the upper limit of the ortho-portion is 20%.
  • the chain terminators are generally used in amounts of 0.5 to 10, preferably 1.5 to 8 mol%, based on diphenols used.
  • the polycarbonate derivatives may preferably be prepared according to the interfacial behavior (cf. H. Schnell, Chemistry and Physics of Polycarbonates, Polymer Reviews, Vol. IX, p. 33ff., Interscience Publ. 1964 ) are prepared in a conventional manner. In this case, the diphenols of the formula (Ia) are dissolved in an aqueous alkaline phase. For the preparation of copolycarbonates with other diphenols, mixtures of diphenols of the formula (Ia) and the other diphenols, for example those of the formula (Ib), are used.
  • chain terminators of, for example, the formula (Ic) can be added.
  • organic phase is reacted with phosgene by the method of interfacial condensation.
  • the reaction temperature is in the range of 0 ° C to 40 ° C.
  • branching agents preferably 0.05 to 2.0 mol% can be presented either with the diphenols in the aqueous alkaline phase or dissolved in the organic solvent added before phosgenation.
  • diphenols of the formula (Ia) and, if appropriate, other diphenols (Ib), their mono- and / or bis-chloroformates may also be used, these being dissolved in organic solvents be added.
  • the amount of chain terminators and of branching agents then depends on the molar amount of diphenolate radicals corresponding to formula (Ia) and optionally formula (Ib); When using chloroformates the amount of phosgene can be reduced accordingly in a known manner.
  • Suitable organic solvents for the chain terminators and optionally for the branching agents and the chloroformates are, for example, methylene chloride, chlorobenzene and in particular mixtures of methylene chloride and chlorobenzene.
  • the chain terminators and branching agents used can be dissolved in the same solvent.
  • methylene chloride, chlorobenzene and mixtures of methylene chloride and chlorobenzene serve as the organic phase for the interfacial polycondensation.
  • the aqueous alkaline phase used is, for example, NaOH solution.
  • the preparation of the polycarbonate derivatives by the interfacial process can be catalyzed in a conventional manner by catalysts such as tertiary amines, in particular tertiary aliphatic amines such as tributylamine or triethylamine; the catalysts can be used in amounts of 0.05 to 10 mol%, based on moles of diphenols used.
  • the catalysts can be added before the beginning of the phosgenation or during or after the phosgenation.
  • the polycarbonate derivatives can be prepared by the known method in the homogeneous phase, the so-called "pyridine process” and by the known melt transesterification process using, for example, diphenyl carbonate instead of phosgene.
  • the polycarbonate derivatives may be linear or branched, they are homopolycarbonates or copolycarbonates based on the diphenols of the formula (Ia). By arbitrary composition with other diphenols, in particular with those of the formula (Ib), the polycarbonate properties can be varied in a favorable manner.
  • the diphenols of the formula (Ia) are present in amounts of from 100 mol% to 2 mol%, preferably in amounts of from 100 mol% to 10 mol% and in particular in amounts of from 100 mol% to 30 mol% %, based on the total amount of 100 mol% of diphenol units contained in polycarbonate derivatives.
  • the polycarbonate derivative may be a copolymer comprising, in particular consisting thereof, monomer units M1 based on the formula (Ib), preferably bisphenol A, and monomer units M2 based on the geminally disubstituted dihydroxydiphenylcycloalkane, preferably the 4,4 '- (3,3,5 -trimethylcyclohexane-1,1-diyl) diphenol, wherein the molar ratio M2 / M1 is preferably greater than 0.3, in particular greater than 0.4, for example greater than 0.5. It is preferred if the polycarbonate derivative has an average molecular weight (Weight average) of at least 10,000, preferably from 20,000 to 300,000.
  • component B may be substantially organic or aqueous.
  • Substantially aqueous means that up to 20% by weight of component B) can be organic solvents.
  • Substantially organic means that up to 5% by weight of water may be present in component B).
  • Component B preferably contains one or consists of a liquid aliphatic, cycloaliphatic and / or aromatic hydrocarbon, a liquid organic ester and / or a mixture of such substances.
  • the organic solvents used are preferably halogen-free organic solvents.
  • aliphatic, cycloaliphatic, aromatic hydrocarbons such as mesitylene, 1,2,4-trimethylbenzene, cumene and solvent naphtha, toluene, xylene
  • (organic) esters such as methyl acetate, ethyl acetate, butyl acetate, methoxypropyl acetate, ethyl 3-ethoxypropionate
  • mesitylene, 1,2,4-trimethylbenzene, cumene and solvent naphtha toluene, xylene, methyl acetate, ethyl acetate, methoxypropyl acetate.
  • Ethyl 3-ethoxypropionate is particularly suitable.
  • a suitable solvent mixture comprises, for example, L1) 0 to 10% by weight, preferably 1 to 5% by weight, in particular 2 to 3% by weight, mesitylene, L2) 10 to 50% by weight, preferably 25 to 50% by weight %, in particular 30 to 40% by weight, 1-methoxy-2-propanol acetate, L3) 0 to 20% by weight, preferably 1 to 20% by weight, in particular 7 to 15% by weight, 1 , 2,4-trimethylbenzene, L4) 10 to 50 wt.%, Preferably 25 to 50 wt.%, In particular 30 to 40 wt.%, Ethyl 3-ethoxypropionate, L5) 0 to 10 wt.
  • the preparation may contain in detail: A) 0.1 to 10 wt .-%, in particular 0.5 to 5 wt .-%, of a binder with a polycarbonate derivative based on a geminal disubstituted dihydroxydiphenylcycloalkane, B) 40 to 99.9 wt %, in particular 45 to 99.5% by weight, of an organic solvent or solvent mixture, C) 0.1 to 6% by weight, in particular 0.5 to 4% by weight, of a colorant or colorant mixture, D ) 0.001 to 6 wt .-%, in particular 0.1 to 4 wt .-%, of a functional material or a Mixture of functional materials, E) 0.1 to 30 wt .-%, in particular 1 to 20 wt .-%, additives and / or auxiliaries, or a mixture of such substances.
  • colorant is all colorants. That means it can be both colorant (a review of dyes there Ullmann's Encyclopedia of Industrial Chemistry, Electronic Release 2007, Wiley Publishing, Chapter “Dyes, General Survey ”) as well as pigments (gives an overview of organic and inorganic pigments Ullmann's Encyclopedia of Industrial Chemistry, Electronic Release 2007, Wiley Verlag, chapter “Pigments, Organic Dyes should be soluble or (stably) dispersible or suspendible in the solvents of component B.
  • the colorant is heated at temperatures of 160 ° C and more for a period of time It is also possible for the colorant to undergo a predetermined and reproducible color change under the processing conditions and to be selected accordingly .Pigments must be present not only in temperature stability, but also in the finest particle size distribution In practice, this means that the particle size should not exceed 1.0 ⁇ m, since otherwise blockages in the print head are the result.As a rule, nanoscale solid-state pigments and dissolved dyes have proved useful.
  • the colorants can be cationic, anionic or even neutral. Only as examples of inkstr Colorants which can be used for printing are: Brilliant black CI No. 28440, Chromogen black CI No.
  • anthraquinone, azo, quinophthalone, coumarin, methine, perinone and / or pyrazole dyes can be used as soluble colorants.
  • colorants can be added either directly as a dye or pigment or as a paste, a mixture of dye and pigment together with another binder additional binder should be chemically compatible with the other components of the formulation, if such a paste is used as a colorant, the quantity of component B refers to the colorant without the other components of the paste, these other components of the paste are then included in component E.
  • so-called colored pigments in the scale colors cyan-magenta-yellow and preferably also (soot) black solid color images are possible.
  • Component D comprises substances that can be seen directly by the human eye or by the use of suitable detectors using technical aids.
  • materials known to those skilled in the art (see also van Renesse in: Optical document security, 3rd ed., Artech House, 2005 ), which are used to secure value and security documents.
  • luminescent substances dye or pigments, organic or inorganic
  • photoluminophores such as photoluminophores, electroluminophores, Antistokes luminophores, fluorophores, but also magnetizable, photoacoustically addressable or piezoelectric materials.
  • Raman-active or Raman-reinforcing materials can be used, as well as so-called barcode materials.
  • the preferred criteria are either the solubility in the component B or pigmented systems particle sizes ⁇ 1 micron and a temperature stability for temperatures> 160 ° C in the sense of the comments on the component C.
  • Functional materials can be added directly or via a paste, ie a mixture with a further binder, which then forms part of component E, or the binder of component A.
  • Component E in ink-jet inks comprises conventionally prepared materials such as anti-foaming agents, modifiers, wetting agents, surfactants, flow agents, dryers, catalysts, (light) stabilizers, preservatives, biocides, surfactants, organic Polymers for viscosity adjustment, and buffer systems.
  • adjusting agents are customary actuating salts in question. An example of this is sodium lactate.
  • biocides all commercially available preservatives which are used for inks come into question. Examples are Proxel® GXL and Parmetol® A26.
  • Suitable surfactants are all commercially available surfactants which are used for inks. Preferred are amphoteric or nonionic surfactants.
  • surfactants which do not alter the properties of the dye.
  • suitable surfactants are betaines and ethoxylated diols. Examples are the product series Surfynol® and Tergitol®.
  • the amount of surfactants is particularly selected when used for ink-jet printing, for example, provided that the surface tension of the ink is in the range of 10 to 60 mN / m, preferably 20 to 45 mN / m, measured at 25 ° C.
  • a buffer system can be set up which stabilizes the pH in the range from 2.5 to 8.5, in particular in the range from 5 to 8.
  • Suitable buffer systems are lithium acetate, borate buffer, triethanolamine or acetic acid / sodium acetate.
  • a buffer system will be considered in particular in the case of a substantially aqueous component B.
  • To adjust the viscosity of the ink (possibly water-soluble) polymers can be provided. Here all suitable for conventional ink formulations polymers come into question.
  • Examples are water-soluble starch, in particular with an average molecular weight of 3,000 to 7,000, polyvinylpyrrolidone, in particular with an average molecular weight of 25,000 to 250,000, polyvinyl alcohol, in particular with an average molecular weight of 10,000 to 20,000, xanthan gum, carboxymethyl cellulose, ethylene oxide / propylene oxide Block copolymer, especially having an average molecular weight of 1,000 to 8,000.
  • An example of the latter block copolymer is the product series Pluronic®.
  • the proportion of biocide, based on the total amount of ink may be in the range of 0 to 0.5% by weight, preferably 0.1 to 0.3% by weight.
  • the proportion of surfactant can range from 0 to 0.2 wt .-%.
  • the proportion of adjusting agents based on the total amount of ink, 0 to 1 wt .-%, preferably 0.1 to 0.5 wt .-%, amount.
  • the auxiliaries also include other components, such as, for example, acetic acid, formic acid or n-methyl-pyrrolidone or other polymers from the dye solution or paste used.
  • component E is supplemented, for example, on Ullmann's Encyclopaedia of Chemical Industry, Electronic Release 2007, Wiley Publishing, Chapter “Paints and Coatings", Section “Paint Additives ", directed.
  • the above-described ink composition is particularly suitable for ink-jet printing, but may be used for any other printing technique as long as the ratio of the individual components to the application is adjusted.
  • An advantage in this context is that the composition described contains a polycarbonate derivative as a binder, if the polymer layers of the composite also consist of polycarbonate.
  • Fig. 1 Two typical main pixel satellite pixel ensembles are shown.
  • the respective satellite pixel B is assigned to the corresponding main pixel A. It is located in a defined relative position to the main pixel A, in the present case approximately in the "7 o'clock position".
  • the satellite pixel B is not so far away from the main pixel A that both pixels are separated from each other.
  • both pixels are separated from each other. This can be achieved each time by adjusting the deflection when ejecting the ink drops from the print head.
  • FIG Fig. 2 Various embodiments of matrices of major and associated satellite pixels are shown.
  • a printhead 1 is shown, which is moved in a printing direction 2 via a printing medium 3, for example a polymer film.
  • a printing medium for example a polymer film.
  • ink outlet openings 4 at the bottom of the printhead 1 single ink drops emerge, which are initially formed in the form of droplets and then split into a main drop and a satellite drop.
  • the main drop is ejected along the normal to the plane formed by the underside of the print head 1 in which the exit openings 4 are located.
  • the path of the main drop is marked 5.
  • the main drop forms the main pixel 11.
  • the satellite drop is ejected onto the polymer film 3 in a direction deflected from the normal. This path is marked 6.
  • the satellite drop forms the satellite pixel 12.
  • the angle at which the satellite drop is deflected with respect to a plane defined by the printing direction 2 and the main pixel 11 is denoted by ⁇ .
  • the angle at which the satellite pixel 11 appears on the polymer film 3 relative to the main pixel 12 to the printing direction 2 is denoted by ⁇ .
  • a deflection device 7 is shown schematically on a drop generator 8 of a print head 1.
  • the droplet generating device 8 has outlet openings 4.
  • the deflection device 7 is provided with channels 9 whose inlet openings 10 are aligned with the outlet openings 4 of the droplet generating device 8.
  • the channels 9 are S-shaped and thus deflect the satellite drops, while the deflection of the trajectories of the main drops is negligible.
  • the satellite drops are deflected in the example shown to the left.
  • Example 1 Preparation of polycarbonate derivatives for an ink composition as a binder
  • the polycarbonate derivative shows a relative solution viscosity of 1.263.
  • the glass transition temperature is determined to be 183 ° C. (DSC).
  • Example 2 Preparation of a liquid preparation suitable for the production of an ink jet ink
  • a liquid preparation is prepared from 17.5 parts by weight of the polycarbonate derivative from Example 1 and 82.5 parts by weight of a solvent mixture according to Table I (data in% by weight, based on the solvent mixture).
  • Table I material Wt .-% mesitylene 2.4 1-methoxy-2-propanol 34.95 1,2,4-trimethylbenzene 10.75 Ethyl 3-ethoxypropionate 33.35 cumene 0.105 Solvent naphtha 18.45
  • the polycarbonate solution obtained is additionally admixed with about 2% of Pigment Black 28.
  • the result is an ink by means of which black and white images can be printed on polycarbonate films.
  • other pigments or dyes can be prepared according to monochrome and / or colored inks.
  • a change in the resolution of a pixel pattern printed with the ink almost does not occur in a joining operation in which the substrate layer printed with the pixel pattern is connected to a substrate layer arranged above it. This means that the pixel pattern is maintained in almost the same resolution even after lamination.
  • This black ink is used with an inkjet printer with a printhead in accordance with Fig. 4 is modified, a pixel pattern printed on a polycarbonate sheet. It results in the Fig. 5 reproduced pixel matrix.
  • Each of the print pixels is bimodal and consists of a larger main pixel and a smaller satellite pixel. The satellite pixel appears at an angle ⁇ to the transport direction (defined from right to left by the rows of print pixels) of approximately 60 ° relative to the main pixel to which it is associated.
  • Example 4 Formation of satellites on a pattern produced by ink-jet printing on surfaces previously rendered hydrophobic in diamond-shaped structures.
  • the main pixels are printed with associated satellite pixels on a first polycarbonate film ( Fig. 6A ).
  • a further polycarbonate film is first hydrophobized in a printing area with a diamond-shaped pattern.
  • the diamonds are so large that at least one print pixel can be printed completely afterwards.
  • the polycarbonate film is printed in a waterless offset process, the so-called Toray process, with a UV-curable and invisible to the human eye color.
  • This color is silicone-containing, without colorants and optionally provided with fluorinated binder proportions.
  • a print motif in the form of diamond lines is copied onto a printing form and printed on a PC film. This will make the in Fig. 6B Diamond lines, not visible to the human eye, printed on the surface.
  • each printing pixel is printed in the form of a main pixel and a satellite pixel appearing at an angle ⁇ relative to the main pixel with respect to the printing direction. This angle ⁇ is indicated by a 1 o'clock position. Where the diamond-shaped rasterization is located, the pixels can not be printed ( Fig. 6C ).
  • the position of the satellite pixels of the yellow color separation becomes relative to that of the main pixels in a 4 o'clock position set.
  • the location of the satellite pixels of the cyan color separation is relative to that of the Main pixels set in a 7 o'clock position.
  • the position of the satellite pixels of the magenta color separation is set relative to that of the main pixels in a 10 o'clock position.
  • the satellite drops are partially recognizable and partially suppressed by the diamond patterns.
  • the films are then stacked and laminated. It forms a monolithic composite of the films.
  • the printed color separations in the layer composite can be assigned to the individual layers of the layer composite: the black color separation can be recognized by the fact that this satellite pixel contained in the 1 o'clock position; the yellow color separation is indicated by the fact that this satellite pixel is in the 4 o'clock position; The cyan color separation is indicated by the fact that this satellite pixel is in the 7 o'clock position, and the magenta color separation is indicated by the fact that it contains satellite pixels in the 10 o'clock position.

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Claims (14)

  1. Composite polymère stratifié pour un document de sécurité et/ou de valeur, comprenant au moins deux couches de polymère reliées les unes aux autres par liaison de matière, dans lequel respectivement des couches d'impression constituées de pixels d'impression sont appliquées dans une zone d'impression sur au moins une surface d'au moins une des couches de polymère,
    dans lequel la couche d'impression est générée au moyen d'une impression à jet d'encre, caractérisé en ce que les pixels d'impression sont constitués respectivement d'un pixel principal et d'au moins un pixel satellite associé au pixel principal et la présence de pixels satellites constitue en plus des pixels principaux, auxquels ils sont associés, une caractéristique de sécurité pour un document de sécurité et/ou de valeur.
  2. Composite polymère stratifié pour un document de sécurité et/ou de valeur selon la revendication 1, caractérisé en ce que la couche d'impression reproduit une caractéristique personnalisée et/ou individualisée.
  3. Composite polymère stratifié pour un document de sécurité et/ou de valeur selon l'une quelconque des revendications précédentes, caractérisé en ce que la couche d'impression est générée avec une tête d'impression à jet d'encre sur une des surfaces, et que chaque pixel satellite est généré sur la surface par rapport à un pixel principal respectif, auquel il est associé, selon une orientation prédéfinie par rapport aux pixels principaux respectifs.
  4. Composite polymère stratifié pour un document de sécurité et/ou de valeur selon la revendication 3, caractérisé en ce que chaque pixel satellite est généré sur la surface par rapport au pixel principal, auquel il est associé, selon un angle α spécifié par rapport à une ligne de liaison de pixels principaux imprimés adjacents, dans lequel α ≠ 0° et α ≠ 180°.
  5. Composite polymère stratifié pour un document de sécurité et/ou de valeur selon l'une quelconque des revendications précédentes, caractérisé en ce que les couches d'impression respectives dans le composite polymère stratifié sont disposées sur des surfaces situées à l'intérieur des couches du composite.
  6. Procédé servant à fabriquer un composite polymère stratifié pour un document de sécurité et/ou de valeur, comprenant au moins deux couches de polymère reliées les unes aux autres par liaison de matière, comprenant les étapes de procédé de : fourniture des couches de polymère pour le composite polymère stratifié, de formation de couches d'impression respectivement constituées de pixels d'impression sur au moins une surface d'au moins une des couches de polymère dans une zone d'impression et de liaison des couches de polymère les unes aux autres,
    dans lequel la couche d'impression est générée au moyen d'une impression à jet d'encre, caractérisé en ce que les pixels d'impression sont constitués respectivement d'un pixel principal et d'au moins un pixel satellite associé au pixel principal, et
    la présence de pixels satellites en plus des pixels principaux, auxquels ils sont associés, constitue une caractéristique de sécurité du document de sécurité et/ou de valeur.
  7. Procédé servant à fabriquer un composite polymère stratifié pour un document de sécurité et/ou de valeur selon la revendication 6, caractérisé en ce que la couche d'impression est pratiquée sous la forme d'une caractéristique personnalisée ou individualisée.
  8. Procédé servant à fabriquer un composite polymère stratifié pour un document de sécurité et/ou de valeur selon l'une quelconque des revendications 6 et 7, caractérisé en ce que la couche d'impression est générée avec une tête d'impression à jet d'encre sur une des surfaces, et que chaque pixel satellite est généré sur la surface par rapport à un pixel principal respectif, auquel il est associé, selon un angle spécifié α par rapport à la direction, selon laquelle la tête d'impression à jet d'encre et la surface sont déplacées l'une par rapport à l'autre.
  9. Procédé servant à fabriquer un composite polymère stratifié pour un document de sécurité et/ou de valeur selon la revendication 8, caractérisé en ce qu'indépendamment de la direction, selon laquelle la tête d'impression à jet d'encre et la surface sont déplacées l'une par rapport à l'autre, chaque pixel satellite est généré sur la surface par rapport au pixel principal, auquel il est associé, selon un angle α spécifié par rapport à une ligne de liaison de pixels principaux imprimés adjacents.
  10. Procédé servant à fabriquer un composite polymère stratifié pour un document de sécurité et/ou de valeur selon l'une quelconque des revendications 8 et 9, caractérisé en ce que l'angle α est réglé par l'ajustement d'un équipement prévu au niveau de la tête d'impression à jet d'encre, servant à dévier des gouttes d'encre satellites sortant de la tête d'impression ou en ce que le système servant à dévier des gouttes d'encres satellites sortant de la tête d'impression est un système présentant des ouvertures traversantes, qui est disposé directement de manière à jouxter des ouvertures de sortie de la tête d'impression.
  11. Procédé servant à fabriquer un composite polymère stratifié pour un document de sécurité et/ou de valeur selon la revendication 10, caractérisé en ce que le système servant à dévier des gouttes d'encre satellites sortant de la tête d'impression est ajusté de telle manière et/ou est réalisé de telle manière qu'un liquide d'encre sortant des ouvertures de sortie de la tête d'impression, formant les pixels satellites sort selon un angle β par rapport à un plan, qui est défini par le pixel principal respectif et la direction, selon laquelle la tête d'impression et la surface sont déplacées l'une par rapport à l'autre.
  12. Procédé servant à fabriquer un composite polymère stratifié pour un document de sécurité et/ou de valeur selon l'une quelconque des revendications 6 à 11, caractérisé en ce que les couches d'impression respectives du composite polymère stratifié sont disposées sur des surfaces situées à l'intérieur des couches de polymère du composite.
  13. Document de sécurité et/ou de valeur contenant un composite polymère stratifié selon l'une quelconque des revendications 1 à 5.
  14. Utilisation du document de sécurité et/ou de valeur selon la revendication 13 en tant que pièce d'identité, passeport, carte de crédit, une carte d'espèces, une carte de paiement en espèces, une carte client, une carte visa, une carte ID ou un permis de conduire.
EP08872939.7A 2008-02-29 2008-10-31 Couche d'impression comprenant des pixels principaux et des pixels satellites sur un composite polymère stratifié pour un document de sécurité et/ou de valeur Active EP2252470B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008012428A DE102008012428B3 (de) 2008-02-29 2008-02-29 Polymerschichtverbund für ein Sicherheits- und/oder Wertdokument und Verfahren zu dessen Herstellung sowie Sicherheits- und/oder Wertdokument und deren Verwendung
PCT/EP2008/009335 WO2009106106A1 (fr) 2008-02-29 2008-10-31 Couche d'impression comprenant des pixels principaux et des pixels satellites sur un composite polymère stratifié pour un document de sécurité et/ou de valeur

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EP2252470A1 EP2252470A1 (fr) 2010-11-24
EP2252470B1 true EP2252470B1 (fr) 2018-10-03

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EP (1) EP2252470B1 (fr)
DE (1) DE102008012428B3 (fr)
ES (1) ES2702817T3 (fr)
WO (1) WO2009106106A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102013000717A1 (de) * 2013-01-17 2014-07-17 Bayer Material Science Ag Datenblatt für ein Sicherheits- und/oder Wertdokument
RU2733702C2 (ru) * 2017-08-31 2020-10-06 Роман Леонидович Пушко Способ контроля подлинности продукции и защиты от контрафакта и фальсификации

Citations (1)

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US5049899A (en) * 1988-10-18 1991-09-17 Imaje (Sa) Method of high resolution printing using satellite ink drops in a continuous ink jet printer

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FR2571663B1 (fr) * 1984-10-11 1987-01-16 Matra Document d'identite difficilement falsifiable et procede de fabrication d'un tel document
US4687526A (en) * 1986-01-08 1987-08-18 Identification Systems Company L.P. Method of making an identification card
CH677905A5 (fr) * 1989-02-20 1991-07-15 Orell Fuessli Graph Betr Ag
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Also Published As

Publication number Publication date
ES2702817T3 (es) 2019-03-05
EP2252470A1 (fr) 2010-11-24
WO2009106106A1 (fr) 2009-09-03
DE102008012428B3 (de) 2009-07-23

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