EP3725537A1 - Produit d'impression pourvu d'au moins une marque d'impression luminescente, son procédé de fabrication et feuille de transfert - Google Patents

Produit d'impression pourvu d'au moins une marque d'impression luminescente, son procédé de fabrication et feuille de transfert Download PDF

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Publication number
EP3725537A1
EP3725537A1 EP20173260.9A EP20173260A EP3725537A1 EP 3725537 A1 EP3725537 A1 EP 3725537A1 EP 20173260 A EP20173260 A EP 20173260A EP 3725537 A1 EP3725537 A1 EP 3725537A1
Authority
EP
European Patent Office
Prior art keywords
transfer film
printed product
cavities
film
product
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.)
Pending
Application number
EP20173260.9A
Other languages
German (de)
English (en)
Inventor
Franziska Peinze
Olga Kulikovska
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
Original Assignee
Bundesdruckerei GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bundesdruckerei GmbH filed Critical Bundesdruckerei GmbH
Publication of EP3725537A1 publication Critical patent/EP3725537A1/fr
Pending legal-status Critical Current

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Classifications

    • 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
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/38278—Contact thermal transfer or sublimation processes using ink-containing structures, e.g. porous or microporous layers, alveoles or cellules
    • 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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/06—Printing methods or features related to printing methods; Location or type of the layers relating to melt (thermal) mass transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/30—Thermal donors, e.g. thermal ribbons
    • 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
    • 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
    • B41M3/16—Braille printing

Definitions

  • the present invention relates to a printed product provided with at least one print feature, a method for producing the printed product provided with the at least one print feature, and a transfer film.
  • the present invention relates to a valuable or security product provided with at least one printing feature, a method for its production and a transfer film which can be used for producing a valuable or security product.
  • Value or security products can be, for example, a personal document, a check card, a non-personalized authorization ID such as a ticket or a means of payment, or a value or security element intended for product security.
  • Value or security products serve to verify the identity of a person or thing or a claim, for example for payment of a sum of money or for the surrender of a product or the provision of a service. For this purpose, it must be ensured that the product cannot be imitated, counterfeited or adulterated, or only with considerable effort.
  • the product therefore contains security features which it is extremely difficult or even practically impossible to copy. For example, like banknotes, the product is made of a material that is not readily available.
  • security features can be formed by special colors, for example luminescent or optically variable colors, optical elements such as holograms, tilt images, kinegrams, lens or prism arrays, as well as guilloches, mottled fibers, security threads and others. Furthermore, it is also necessary that the value or security documents can be easily produced.
  • printed security features come into consideration which are individualizing, for example, such as a passport photo of the owner of the document or the like.
  • Such features can be generated, for example, with a thermal transfer process ( DE 100 47 460 A1 ).
  • thermo protective layer transfer sheet which is used for application to an image, for example.
  • This transfer layer is initially on a substrate film.
  • the transfer layer is formed by a layer sequence, namely a separating layer, a writable protective layer and a heat-sensitive resin adhesive layer.
  • the writable protective layer is porous.
  • the transfer layer is transferred from the substrate film to the image by means of a thermal transfer process. This achieves good resistance to moisture and solvents as well as good writability with an aqueous ink.
  • a safety sheet specified as a printable substrate which contains a transparent or translucent layer.
  • This layer is applied to a sheet of paper and is formed by a composition which can be prepared in an aqueous medium.
  • This composition contains colloidal silicon dioxide in the form of an aqueous dispersion, an elastic binder, likewise in the form of an aqueous dispersion, optionally a crosslinking agent and possibly other additives used in the paper industry. The applied composition is then dried.
  • a method for producing a security document with a microporous laminatable printing film is specified.
  • the film has cavities for receiving ink on at least one surface.
  • the ink is printed flat in at least one area on the surface. This film is joined and laminated with other films to produce a document body.
  • the present invention is therefore based on the object of forming a print feature (printed security feature) of a value or security product which is particularly forgery-proof and which is preferably also perceptible by touch.
  • a security feature should be able to be implemented with simple means and without complex apparatus be.
  • the printed product can be a valuable product or a security product.
  • the value or security product can be a value or security document or a security element or transfer element, i.e. an element which is inextricably connected, for example, to an object to be protected against imitation, forgery or forgery, for example a sticker, label or the like.
  • a passport, identity card, driver's license or another ID card or an access control card a vehicle registration document, vehicle registration document, visa, check, Means of payment, in particular a bank note, a check, bank, credit or cash card, customer card, health card, chip card, company ID, proof of eligibility, membership card, gift or shopping voucher, waybill or other proof of authorization, tax code, postage stamp, ticket, (game -)
  • adhesive labels e.g. for product security
  • Such products are value or security documents.
  • a product according to the invention is also to be understood as a security element which has a printed security feature of the type according to the invention (printing feature) and which can be permanently connected to an object to be protected, such as a product or a value or security document, for example a sticker, label or like that.
  • the value or security document can be in ID 1, ID 2, ID 3 or in any other format, for example in booklet form, as in the case of a passport-like object. It is generally formed by a laminate of several document layers, which are connected to one another over a large area under the action of heat and under increased pressure. These products should meet the standardized requirements, for example ISO 10373, ISO / IEC 7810, ISO 14443.
  • the product layers consist, for example, of a carrier material that is suitable for lamination.
  • the valuable or security product can be formed from a polymer selected from a group comprising polycarbonate (PC), in particular bisphenol A polycarbonate or a polycarbonate formed with a geminally disubstituted bis (hydroxyphenyl) cycloalkane, polyethylene terephthalate (PET ), their derivatives such as glycol-modified PET (PETG), polyethylene naphthalate (PEN), polyvinyl chloride (PVC), polyvinyl butyral (PVB), polymethyl methacrylate (PMMA), polyimide (PI), polyvinyl alcohol (PVA), polystyrene (PS), polyvinyl phenol (PVP), polypropylene (PP), polyethylene (PE), thermoplastic elastomers (TPE), in particular thermoplastic polyurethane (TPU), acrylonitrile-butadiene-styrene copolymer (ABS) and their derivatives, and / or paper (cellulose) and / or cardboard and / or a glass and
  • the product can also be made from several of these materials, in particular if it is made from several layers and the individual layers are made from different materials. It preferably consists of PC or PC / TPU / PC.
  • the polymers can be either filled or unfilled. In the latter case, they are preferably transparent or translucent. If the polymers are filled, they are opaque.
  • the above information relates both to films to be joined together and to liquid formulations that are applied to a preliminary product, such as a protective or topcoat.
  • the product is preferably made from 3 to 12, preferably 4 to 10, films.
  • the foils can carry further printing layers arranged on the outside of the valuable or security product or arranged on the inside thereof.
  • a laminate formed in this way can then be coated on one or both sides with the protective or topcoat or with a film.
  • the film can in particular be a volume hologram, a film with a surface hologram (for example a kinegraphic element) or a scratch protection film.
  • Overlay layers formed in this way protect a security feature arranged underneath and / or give the document the required abrasion resistance.
  • pattern a somehow designed distribution of elements that convey an optical impression for the human eye and / or that convey an impression that a person can tactilely perceive is preferred in a two-dimensional arrangement on one or more surfaces, which result in a self-contained representation, for example an image, picture element, character, in particular an alphanumeric character, a symbol, coat of arms, a line, formula or the like.
  • the pattern can, for example, contain information and therefore form an identification.
  • the visual impression can be perceived by contrasting surface areas, with a contrast between individual pattern elements being produced by different color tones, brightnesses or different surface properties (gloss, roughness or the like).
  • pattern element Insofar as the term “pattern element” is mentioned in the description and in the claims of the present application, this is to be understood as a component / element of a pattern.
  • the printed product according to the invention has a printed product main body with a first and a second main side. At least one pattern element arranged in the form of a pattern is located on at least one of the two main sides. According to the present invention, the pattern forms a printing feature.
  • the at least one pattern element contains a contrast substance in at least one layer area arranged on the inside in the at least one pattern element. This contrast substance is visually perceptible.
  • the layer area is designed in particular in the form of a layer and extends over a part of the main body of the printed product, i.e. in particular forms a layer of the main body.
  • the at least one pattern element is raised on the respective main side. It is inextricably linked to the main body of the printed product. However, the contrast substance need not be restricted to the layer area.
  • the film is a transfer film.
  • the process has the following additional process step: c. Transfer of at least one partial surface area of the transfer film by mechanical and preferably additional thermal action on the at least one partial surface area on the main printed product body, the at least one partial surface area of the transfer film with its surface on the loading side inextricably connected to the printed product main body and on the respective main side Pattern is formed with at least one raised pattern element.
  • the transfer film according to the invention has the open cavities on the loading side of the transfer film.
  • the cavities are loaded with the contrast substance.
  • the printed product can in particular be a valuable or security product.
  • the main body of the printed product is a preliminary product of the valuable or security product, i.e. an object that can be converted into the valuable or security product (the printed product) by performing process steps (a), (b) and (c).
  • the printed product according to the invention, the method according to the invention and the transfer film according to the invention allow, for example, a simple production of an individualizing value or security product because the transfer film can be individually transferred to the main body of the printed product using simple means and forms the printing feature there.
  • This print feature is visually perceptible due to its loading with the contrast substance, in particular a color substance, and, moreover, because the print feature is formed on the main body of the printed product by a pattern of raised pattern elements, can be perceived (palpably) by touch, but only if the thickness of the pattern elements on the printed product main body is sufficiently large (at least about 30 ⁇ m, more preferably at least about 100 ⁇ m thick, and preferably at most 500 ⁇ m).
  • the loading of the transfer film with the contrast substance can be implemented very easily with conventional material application processes, for example with an immersion process.
  • the individual pattern elements to be formed on the respective main side of the main body of the printed product can then be produced using a conventional thermal transfer process. Since the contrast substance is not located on the outside of the pattern elements but in their inner volume, the method according to the invention also ensures that the individualizing visual impression produced by the contrast substance is produced by the contrast substance contained inside the raised pattern elements. It has also been found that despite the loading of the cavities with the contrast substance, it is ensured that the raised pattern elements adhere firmly to the main sides of the main body of the printed product.
  • the contrast substance in the pattern elements does not form a layer at the interfaces between these and the main body of the printed product that would allow a simplified separation of the pattern elements from the main body, since the contrast substance is not located at the interfaces. Rather, the contrast substance is distributed at least in part of the inner volume of the pattern elements. A contrast substance can therefore also be selected which would otherwise facilitate detachment of the pattern elements from the main body.
  • the cavities in the transfer film absorb the contrast substance. Penetration is mediated by capillary forces.
  • the contrast substance penetrates the transfer film and is held there firmly. If, after the loading of the cavities in the transfer film, there is still excess contrast substance on the loading side of the transfer film, this can be removed in a preferred embodiment of the present invention so that the contrast substance is ultimately only in the cavities. This can be done, for example, by doctoring / wiping off excess contrast substance.
  • the contrast substance can be a color substance or another visually perceptible substance, for example a metal.
  • a coloring substance is a paint containing one or more pigments, or an ink containing one or more dyes.
  • the color substance can have a spectrally colored, black or gray hue.
  • a metal can be deposited in the cavities from a solution containing ions of this metal and a reducing agent for these ions, so that a shiny metallic effect results.
  • a Fehling's solution titanium copper (II) complex in water
  • II tartrate copper
  • ammonia an aqueous solution containing sugar or an aldehyde to deposit silver will.
  • the transfer film is then heated to generate the metal in the cavities.
  • a conventional coating process can be used to load the cavities of the transfer film with the contrast substance, for example a printing process such as an offset or screen printing process, a doctor blade process, a roller coating process, a dipping process, a curtain casting process, a spin coating process or the like.
  • a printing process such as an offset or screen printing process, a doctor blade process, a roller coating process, a dipping process, a curtain casting process, a spin coating process or the like.
  • the partial surface areas of the transfer film to form the pattern elements are transferred to these transfer film areas on the main body of the printed product by mechanical action (pressing the transfer film onto the main side of the printed product) and thermal action (supplying heat to the transfer film), wherein the layer area in which the cavities with the contrast substance contained therein are located comes into contact with the main side of the main body of the printed product.
  • the partial surface areas are then permanently connected to the main body.
  • the transfer film is pressed locally against the surface of the main body of the printed product in the partial surface areas corresponding to the pattern elements to be formed and also heated. This leads in particular to the permanent connection when the material of the transfer film is formed by a thermoplastic material, so that it at least partially melts when heated.
  • the transfer film can also be chemically functionalized on the contact side so that it connects to the main body by supplying thermal energy.
  • thermal action which is used for the permanent connection of the partial surface area of the transfer film with the main side of the printed product
  • action by means of electromagnetic radiation for example UV radiation, can also be selected. This can cause a chemical reaction at the interface between the partial surface area of the transfer film and the main side of the printed product, which leads to the permanent connection.
  • a tool is used for the heating, with which the transfer film is pressed against the main side of the main body of the printed product in certain areas.
  • a tool in particular a printing tool, is used, for example, in printing devices for the thermal transfer process, for example a stamp suitable for this purpose.
  • Heat is supplied to the tool, which it then passes on locally to the transfer film, or the tool is designed to generate the heat itself, for example via resistance heating or an ultrasonic vibration device.
  • a separate tool can also be used for the heating, for example an electromagnetic radiation source, for example a laser device, the radiation of which is absorbed in the transfer film so that it is heated.
  • the transfer film can contain special absorbers, in particular substances that are selectively absorbent in the infrared spectral range (thermosensitive substances). These are preferably located in an area in the transfer film which is arranged adjacent to its loading side.
  • the transfer film in the partial surface area can first be brought into contact with the main side of the main body and the partial surface area brought into contact can then be heated.
  • the partial surface area is optionally additionally pressed onto the main side of the main body.
  • the part of the transfer film that has not been connected to the main body ie does not correspond to the partial surface areas, can be mechanically separated from the connected partial surface areas of the transfer film, which now form the pattern elements, and lifted off the main body.
  • the mechanical separation of the partial surface areas of the transfer film from the remainder of the film occurs, for example, by means of a punching process that is carried out by means of the tool for pressing on and supplying the thermal energy. If the heating takes place by means of electromagnetic radiation or electromagnetic radiation is used to trigger a chemical reaction, this can be passed through suitable pressure elements.
  • the pressing elements must be transparent / translucent for the electromagnetic radiation. It can also be provided that parts of the transfer film that are not connected to the main body are mechanically and / or chemically removed, for example in a brushing and / or washing process, if these are not related to the remaining film.
  • the spatial distribution of the contrast substance in the inner layer area given by the cavities can be canceled out, for example by melting the material of the partial surface area of the transfer film, so that the contrast substance is evenly distributed in the layer area.
  • the spatial distribution given by the cavities is retained or partially retained.
  • the material of the main body of the printed product can be any of the materials mentioned above for these products, particularly in the case of the production of a valuable or security product.
  • other materials and materials can also be considered, for example composite materials, in particular fiber composite materials, made of the materials mentioned and also filled materials, the composite materials and filled materials being made up of a base material made of one of the materials mentioned and fillers or fibers, for example made of polymer, Paper (cellulose), ceramic, glass, metal or the like are formed.
  • the fillers can be formed by fibers, grains or other particles.
  • the main body of the printed product is formed from or can contain a polymer material selected from PET and PC, wherein the polymer can additionally contain fillers, for example for coloring.
  • the main body of the printed product can be a preliminary product for a valuable or security product, in particular for a valuable or security document.
  • the main body of the printed product can therefore be formed in the form of a preferably monolithic laminate made up of several layers.
  • the individual layers can each be opaque or transparent or translucent.
  • the preliminary product can already have other security features and / or an internal electrical circuit, for example an RFID circuit with an RFID chip and an antenna, and / or electronic display elements on the outside.
  • the main body of the printed product can be in the format intended for end use or in a multiple use, from which, after the method according to the invention has been carried out, the printed product equipped with the printing feature is formed in the intended format by separating, for example, cutting or punching out.
  • the main body of the printed product can also have the thickness required for this: it can preferably be at least 500 ⁇ m and especially preferably at least 700 ⁇ m.
  • the thickness is preferably a maximum of 2 mm and particularly preferably a maximum of 1 mm.
  • the thickness can be adapted to the respective requirements. For example, in these cases the thickness can preferably be at least 50 ⁇ m, more preferably at least 200 ⁇ m and most preferably at least 700 ⁇ m. It can preferably be a maximum of 5 mm, more preferably a maximum of 2 mm and most preferably a maximum of 1 mm.
  • the material of the transfer film can also be any of the materials mentioned above for valuable or security products, especially in the case of the production of a valuable or security product. In principle, however, other materials can also be used for the transfer film, it being possible in principle to use the materials and materials mentioned for the main body of the printed product.
  • the transfer film is transparent or translucent (translucent) so that the contrast substance can be seen through the transfer film. Therefore the material from which the transfer film is made is transparent or translucent.
  • the transfer film can, however, contain dyes or fillers, provided that the transparency or translucency of the transfer film is at least not significantly impaired.
  • the transfer film is formed from or can contain a polymer material which is selected from PET and PC.
  • the thickness of the transfer film can preferably be at least 2 ⁇ m, more preferably at least 2.5 ⁇ m, even more preferably at least 5 ⁇ m and most preferably at least 7 ⁇ m.
  • the transfer film is preferably a maximum of 250 ⁇ m, more preferably a maximum of 100 ⁇ m, more preferably a maximum of 75 ⁇ m, even more preferably a maximum of 50 ⁇ m and most preferably a maximum of 25 ⁇ m thick. It can be 10 ⁇ m thick, for example.
  • the cavities in the transfer film can be created during its production or only introduced into it after its production.
  • the film can be provided with an expanding material, for example during extrusion, which outgasses at an elevated temperature and creates the cavities.
  • inorganic or organic materials that have a porosity can also be incorporated into the polymer material of the transfer film, for example silicon dioxide or aluminum oxide, which can be in the form of nanoscale particles.
  • larger particles with correspondingly small cavities can also be used, for example zeolites.
  • filled materials are exemplified in WO 2008/011919 A1 specified as a coating material that contains inorganic nanoparticles. For this reason, this document is hereby fully incorporated into the disclosure content of the present application, at least at least with regard to the production of such materials.
  • DE 10 2010 035 890 A1 also shows a method of making a microporous film.
  • a particulate material is extruded into a film.
  • the particles have defined cavities. It can, for example, be zeolites or fullerenes.
  • a suspension of polymer particles, for example PC particles is applied to a film carrier. The liquid components of the suspension are then evaporated, so that the remaining PC particles combine with one another and form a porous film.
  • the film carrier can also consist of PC or at least contain this.
  • the PC particles can also be crosslinked by suitable crosslinkers present.
  • suitable crosslinkers present.
  • this document is also hereby included in its entirety, at least at least with regard to the production of such materials, in the disclosure content of the present application.
  • the polymers mentioned there it is also possible to use the abovementioned polymers that are suitable for forming the transfer film.
  • a foamed resin emulsion composition can also be used.
  • Such a manufacturing method with an acrylic ester resin is in DE 600 36 341 T2 described. For this reason, this document is also hereby included in its entirety, at least at least with regard to the production of such a polymer material, in the disclosure content of the present application.
  • polymers other than acrylic ester resins are also used for such a process, for example PC or PET, appropriate adaptations to be made by a person skilled in the art are necessary.
  • These materials can be produced using the resin emulsion and also foaming agents, foam stabilizers and thickeners.
  • the cavities are only formed in the transfer film after it has been manufactured, they can be created by perforation processes, for example by laser drilling (laser ablation, either thermally with a CO 2 laser or by photolytic decomposition of the polymer material with a UV (excimer) laser .
  • the cavities can be formed by holes, depressions, cavities, channels, pores, recesses, cavities and the like.
  • the film material can be porous.
  • the cavities can penetrate the transfer film completely or only partially.
  • the cavities are preferably characterized in that they are elongated and have a length to diameter / thickness ratio of at least 5, more preferably at least 10, even more preferably at least 20, even more preferably at least 50 and most preferably at least 100. This ratio can be up to 5000, preferably up to 2000, more preferably up to 500 and most preferably up to 100.
  • the cavities have a size in the micrometer range, i.
  • the diameter / the thickness of the cavities is in the range from 1 ⁇ m to 1000 ⁇ m, preferably in the range from 1 ⁇ m to 500 ⁇ m and very particularly preferably in the range from 1 ⁇ m to 100 ⁇ m.
  • the cavities can also be smaller: their size can, for example, be at least 50 nm and more preferably at least 100 nm and a maximum of 1000 ⁇ m, better a maximum of 500 ⁇ m and best of all a maximum of 100 ⁇ m.
  • the cavities on the loading side of the transfer film preferably occupy the smallest possible opening cross-section, so that the surface proportion of the transfer film material on this side is as large as possible is.
  • the area proportion of the opening cross section of the cavities is preferably less than 50%, more preferably less than 40%, even more preferably less than 30%, even more preferably less than 20% and most preferably less than 10%, based on the area of the transfer film on this side.
  • the openings of the cavities are preferably distributed as uniformly as possible on the loading side.
  • the cavities are located exclusively in a layer area adjacent to the loading side in the transfer film, this layer area not taking up the entire volume of the transfer film but only a portion of it.
  • the cavities are open to the surface on the loading side so that the contrast substance can be introduced into them.
  • the layer area can preferably occupy half the thickness of the transfer film or a lesser or greater proportion, for example in a range from 5% to 40% or 60% to 90% of the thickness.
  • the contrast substance in the print feature appears to be internal, even when examined not only with the naked eye but also by means of a microscope.
  • the contrast substance can be formed by any color substance suitable for a printing process, for example a printing ink that contains the color-forming agents in the form of inorganic and / or organic pigments, or a printing ink that contains the color-forming agents in the form of inorganic and / or organic dyes .
  • the color substance can also be formed by a luminescent agent.
  • the pigments or dyes can also be luminescent. Examples of printing inks and printing inks are in DE 10 2007 052 947 A1 specified. For this reason, this document is hereby fully incorporated into the disclosure content of the present application, at least at least with regard to the colors and inks specified there.
  • the luminescent means can also be formed by inorganic and / or organic pigments and / or luminescent substances. It can be, for example, photoluminophores (fluorophores, phosphorophores), electroluminophores or Antistokes luminophores.
  • the color substance contains further usual constituents, which a printing ink or a printing ink also has, for example binders, solvents and other usual constituents.
  • the binder is a PC derivative. Such PC derivatives are also in DE 10 2007 052 947 A1 specified. For this reason, too, this document is hereby fully included in the disclosure content of the present application, at least with regard to the PC derivatives specified there as binders.
  • the solvent can be aqueous or organic. In particular, it can be a mixture. The mixture can be purely organic or additionally contain water. Such solvents are also in DE 10 2007 052 947 A1 specified. For this reason, too, this document is hereby fully incorporated into the disclosure content of the present application, at least with regard to the solvents specified there.
  • the transfer film has regularly arranged thin areas (reduced thickness of the transfer film compared to the rest of the film) so that the partial surface areas to be applied are easily mechanically separated from the rest of the transfer film along thin areas that border the partial surface areas can be.
  • the partial surface areas can be separated very easily and precisely from the film remainder that is not to be applied, because the thin areas represent intended separation points.
  • the grid of the thin areas and the raised areas preferably extends over the entire surface of the transfer film. This results in a controlled shaping of the pattern elements. If the thin areas are arranged, for example, in a hexagonal grid (honeycomb structure), a regular edge structure of the pattern areas corresponding to this grid results.
  • the thin areas preferably do not extend completely through the transfer film. They are rasterized two-dimensionally, that is to say formed in a preferably regular two-dimensional arrangement. Accordingly, the raised areas in between are also arranged regularly.
  • the thin regions can be formed, for example, by continuous trenches or also by recesses or perforations that are spaced apart from one another.
  • the trenches can also have perforations.
  • the thin regions can either be formed exclusively by trenches, which for example have a uniform depth, or, in addition to trenches with a uniform depth, can also have perforations which completely penetrate the material of the film. Alternatively, only perforations or trenches with varying depths or other types of thin areas can also be present.
  • the cavities, recesses, incisions, recesses, openings, hollows and the like that form the thin regions are preferably in a regular one-dimensional or two-dimensional arrangement.
  • the thin regions can be designed in the form of a square, rectangular, parallelogram-like grid formed by hexagons or also by curved groups of boundary lines that cross each other at any given angle.
  • Grid cells are formed by the grid of the thin areas (grid cells between the thin areas form pixels in a raised shape, so that a pixelated transfer film formed by the thin areas in grid form is formed).
  • the pixels can be “punctiform” or in the form of stripes or in yet another form raised in relation to the thin areas.
  • the minimum dimensions of the grid cells are determined by the desired fineness of the film element.
  • the grid has grid cells with lateral dimensions of 50 ⁇ m to 500 ⁇ m, preferably 70 ⁇ m to 200 ⁇ m.
  • the depth of the depressions or the like. is determined by the total thickness of the film.
  • the remaining thickness should be so small that the film preferably only tears slightly in the thin areas.
  • the remaining thickness can be 5 ⁇ m to 200 ⁇ m, more preferably 30 ⁇ m to 100 ⁇ m.
  • the thin areas can be formed by material removal or material reshaping, for example using an etching process or an embossing process, after the transfer film has been produced.
  • the thin areas can also be produced during the production of the transfer film, for example by means of targeted material build-up.
  • the print features to be formed on the main body of the printed product can be screened or non-screened. Any desired raised printing features can be created on the main body. It is therefore possible not only to produce the raised printing features in a single design, for example for a larger set of value or security documents, which is common to all of these documents, but also to form an individual design of the printing feature for each individual document.
  • the raised printing features can thus also be designed in the form of individualizing, in particular personalizing, identifications, i.e. in the form of markings which, for example, reproduce individualizing data of a person or thing to which the value or security document is assigned, either in plain text or in encrypted form. For example, the name or another identifier of the person can be presented in a raised manner in this way.
  • the raised printing feature can encode information.
  • the raised identification can be reproduced with alphanumeric characters or, more preferably, in Braille, in particular in Braille.
  • the raised printing feature can thus represent an authentication feature.
  • the raised printing feature can also be a verification or authenticity feature.
  • FIG. 11 is a cross-sectional view along section II in FIG Fig. 1a which represents the individual polymer layers as well as external protective lacquer layers 150, which are intended to protect against abrasion.
  • An electronic RFID circuit with a chip 161 and an antenna 162 is located on an inner layer 160.
  • the individual layers are shown separately, but can no longer be distinguished from one another in the laminated state since they are fused together during lamination (monolithic structure).
  • the polymer layers can for example consist of PC and / or PET or contain these materials.
  • the single ones Layers can be unfilled or filled with fillers. In the latter case they are opaque, otherwise transparent.
  • the protective lacquer is transparent so that the information underneath is visible from the outside. If the pattern elements are to be haptically perceptible on the card according to the present invention, they must be significantly thicker than the protective lacquer layer that covers them.
  • the card 100 has a top side 101 and a bottom side 102.
  • the data in the first and in the second data field are produced by printing layers which are arranged on an outer inner layer 140 of the document, but directly below the outer protective lacquer layer 150.
  • the card 100 furthermore contains an additional field 170 in which a copy of the facial image of the holder of the card is arranged.
  • This facial image is designed in the form of a printed feature 200 according to the present invention and is formed by a pattern of a plurality of raised pattern elements which are produced by the method according to the invention.
  • the method according to the invention for producing the printed product provided with the at least one printed feature 200, namely the card 100, is step-by-step in FIG Fig. 2 shown schematically:
  • a first process step Fig. 2a
  • a transfer film 300 having cavities 310 and a printed product main body 400 Figure 2c
  • This step corresponds to process step (a) of the process according to the invention.
  • the main body can, for example, be an almost completed identity card, which already has all the other security features including the externally visible print features, such as the facial image 110 of the card holder and the data of the card holder in the data fields 120, 130, however not yet the printing feature according to the present invention and optionally the protective lacquer layers 150 to be applied externally.
  • the card can already be present in the final format.
  • the film 300 having the cavities 310 is designed as a transfer film, i.e. In a further step of the method according to the invention, it is applied in regions to a main side 410 of the main body 400 and is permanently connected to the main body.
  • the transfer film can be formed from PC or PET, for example, and have a thickness of, for example, 10 ⁇ m. However, it can also be thicker, in particular if it is intended to form a tactile security feature, in this case for example at least 30 ⁇ m and for example at most 500 ⁇ m.
  • the transfer film is preferably transparent, but can also be translucent.
  • the transfer film can be colored, but this coloring is not intended to impair the visual perception of the contrast substance to be introduced into the cavities 310.
  • the transfer film has an upper side 301 and a lower side 302.
  • the transfer film 300 has cavities 310 on its underside which, for example, as in FIG Fig. 2a shown starting from the underside 302 in the form of elongated channels and extending into the interior of the film. Since these channels in a further process step (see Figure 2b ) are loaded with a contrast substance, the underside to which the channels are open is designed as the loading side of the transfer film. The channels do not extend completely through the transfer foil but end inside the transfer foil. The area in which the cavities are located forms the layer area 320 in the transfer film. This layer area is located in the lower area of the transfer film adjacent to its loading side. The layer area thus extends exclusively to a layered partial area of the transfer film.
  • the channels can be produced, for example, with a method in which the layer region formed by the channels is applied to a carrier 600, the channels being formed during this application process (see FIG Fig. 5 ). The totality of layer area and carrier then finally forms the transfer film.
  • the channels 310 are loaded with a contrast substance K ( Figure 2b ).
  • This process step corresponds to process step (b) of the process according to the invention.
  • the contrast substance K can, for example, be a color substance, for example an ink.
  • an ink is exemplified in DE 10 2007 052 947 A1 specified. It contains, for example, a PC derivative as a binder in an organic solvent mixture and a pigment, for example Pigment Black 28.
  • the channels 310 of the transfer film 300 are loaded with this ink, for example using a roller coating process.
  • the transfer film has first been conditioned in an atmosphere which is formed by a vapor of the solvent mixture of the ink in order to saturate the channels with the solvent mixture. This ensures that the ink easily penetrates the channels. Due to the chemical affinity of the PC ink to the PC film, the ink easily penetrates the channels through the capillary forces.
  • the transfer film 300 loaded in this way is then brought into contact with the printed product main body 400, namely the preproduct of the identity card ( Figure 2c ).
  • Individual partial surface areas 330 of the transfer film 300 loaded with the contrast substance K are then permanently connected to the preliminary product 400 of the card 100 by means of a suitable tool 500.
  • the sub-area is drawn as a broken line and separated from the rest of the transfer film.
  • the film remainder 300 'not connected to the preliminary product 400 is then lifted off ( Fig. 2e ).
  • This sequence corresponds to method step (c) of the method according to the invention.
  • the material of the partial surface areas is melted so that the contrast substance is evenly distributed in the inner layer area 320 ( Fig. 2e ).
  • the loaded transfer film 300 is placed on a main side 410 of the preliminary product 400 in such a way that the layer region 320 in which the channels 310 are located comes into contact with this main side.
  • a thermal printing tool 500 is placed on a partial surface area 330 of the transfer film 300 from above, which corresponds to a pattern element 350 to be formed ( Fig. 2e ).
  • This tool can, for example, be a heated needle that punches out a small subarea of the transfer film pixel by pixel.
  • this punching tool is pressed onto the upper side 301 of the transfer film.
  • thermal energy is transferred from the heated tool to the transfer film.
  • the resultant increase in temperature leads to the transfer film partially melting in the pressed area, so that it is firmly bonded to the surface 410 of the preliminary product 400 of the card 100.
  • This process step can be carried out in a conventional thermal printing device.
  • a pattern element 350 therefore remains on the surface 410 of the preliminary product 400 of the card 100 and is inextricably linked to the card surface.
  • the Layer region 320 loaded with the ink K. Due to the partial melting of the transfer film material, the channels 310 are no longer present. For this, the ink has distributed itself in the layer region 320. Since this is located on the side of the element adjacent to the card surface and is still covered by an unloaded area, the ink is arranged inside the pattern element. This can also be checked with a microscope.
  • Fig. 3 a cross-section of several sub-elements of the raised printing feature 200 produced by the method according to the invention on the card 100 is shown.
  • the individual sub-elements form pattern elements 350 of the pattern forming the print feature.
  • the pattern elements are raised above the card surface 410 and are inextricably linked to it. They have a layer region 320 of the contrast substance, here the ink K, arranged below and thus on the inside.
  • these pattern elements can be visually perceived separately with the human eye and, if the thickness of the pattern elements is sufficiently large (greater than 30 ⁇ m), can also be perceived haptically.
  • Fig. 4 are diverse with the in Fig. 2 Raised patterns 360 produced from a plurality of possible pattern elements 350 are shown.
  • each character being formed by a single pattern element 350 or by a group of several pattern elements arranged next to one another without gaps.
  • the tool 500 used to form the respective pattern element must be designed in the shape of the pattern element to be formed.
  • the individual pattern elements can each have the same shape, for example a hexagonal or circular shape, so that they can always be produced with the same tool.
  • each line can be formed by a single pattern element 350 or by a plurality of pattern elements arranged next to one another without gaps. In this respect, the same applies as for the embodiment of FIG Figure 4a .
  • the transfer film 300 used for this must be at least 30 ⁇ m thick. It is preferably about 100 ⁇ m thick so that the writing can be easily perceived by a person.
  • the individual Braille writing points are formed by individual, preferably circular, pattern elements 350.
  • a method for creating cavities 310 between polymer particles 370 in a layer region 320 of a transfer film 300 is shown schematically:
  • a suspension 380 of polymer particles 370 for example PC particles
  • a film carrier 600 for example made of a polymer, in particular made of PC.
  • all of the liquid fractions 390 of the suspension are evaporated, so that the remaining polymer particles combine with one another and form a layer region 320 provided with cavities 310 between the polymer particles.
  • a metal strip is used as the film carrier instead of PC, the layer area can be lifted off, so that a continuous transfer film with cavities is formed.
  • the polymer particles can be partially dissolved in the suspension in order to improve the adhesion of the polymer particles to one another when the liquid constituents evaporate.
  • the polymer particles can have reactive groups on the surface in order to bring about a subsequent crosslinking, so that the layer area has a firm internal cohesion.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Methods (AREA)
EP20173260.9A 2013-10-21 2014-10-20 Produit d'impression pourvu d'au moins une marque d'impression luminescente, son procédé de fabrication et feuille de transfert Pending EP3725537A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE201310221324 DE102013221324A1 (de) 2013-10-21 2013-10-21 Mit mindestens einem Druckmerkmal versehenes Druckprodukt, Verfahren zu dessen Herstellung und Transferfolie
PCT/EP2014/072400 WO2015059074A1 (fr) 2013-10-21 2014-10-20 Produit imprimé pourvu d'au moins un signe imprimé, procédé de fabrication et film de transfert
EP14792428.6A EP3060409B1 (fr) 2013-10-21 2014-10-20 Produit imprimé pourvu d'au moins un signe imprimé, procédé de fabrication et film de transfert

Related Parent Applications (2)

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EP14792428.6A Division-Into EP3060409B1 (fr) 2013-10-21 2014-10-20 Produit imprimé pourvu d'au moins un signe imprimé, procédé de fabrication et film de transfert
EP14792428.6A Division EP3060409B1 (fr) 2013-10-21 2014-10-20 Produit imprimé pourvu d'au moins un signe imprimé, procédé de fabrication et film de transfert

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EP3725537A1 true EP3725537A1 (fr) 2020-10-21

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EP20173260.9A Pending EP3725537A1 (fr) 2013-10-21 2014-10-20 Produit d'impression pourvu d'au moins une marque d'impression luminescente, son procédé de fabrication et feuille de transfert

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Citations (12)

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US4507346A (en) * 1982-04-08 1985-03-26 Gao Gesellschaft Fur Automation Und Organisation Mbh Multilayer identification card and a method of producing it
EP0318717A2 (fr) * 1987-12-04 1989-06-07 GAO Gesellschaft für Automation und Organisation mbH Document avec des reliefs pour éviter sa falsification et procédé de fabrication d'un tel document
US6004419A (en) * 1994-12-27 1999-12-21 Dai Nippon Printing Co., Ltd. Heat transfer printing process for producing raised images
DE10047460A1 (de) 2000-09-21 2002-04-11 Orga Kartensysteme Gmbh Personalisiertes Sicherheitserzeugnis
DE10247591A1 (de) * 2002-10-11 2004-04-22 Giesecke & Devrient Gmbh Wertdokument
EP1683826A2 (fr) * 2005-01-25 2006-07-26 Hansgeorg Neubig Procédé de fabrication d'une structure en relief tridimensionnel sur la surface d'un support, composite stratifié pour la préparation d'un tel procédé et utilisation d'une structure en relief préparée au moyen de ce procédé
EP1518708B1 (fr) 2003-09-25 2006-08-30 Dai Nippon Printing Co., Ltd. Feuille pour le transfert thermique d'une couche protectrice et impression protégée par ladite couche
DE60036341T2 (de) 1999-07-23 2008-01-10 Dainichiseika Color & Chemicals Mfg. Co., Ltd. Verfahren zur Herstellung von bedruckten Artikeln
WO2008011919A1 (fr) 2006-07-28 2008-01-31 Ilford Imaging Switzerland Gmbh Matériaux flexibles pour applications optiques
DE60131180T2 (de) 2000-09-11 2008-08-07 Arjowiggins Security Sicherheitsblatt, das eine durchsichtige oder transluzente schicht enthält
DE102007052947A1 (de) 2007-10-31 2009-05-07 Bayer Materialscience Ag Verfahren zur Herstellung eines Polycarbonat-Schichtverbundes
DE102010035890A1 (de) 2010-08-30 2012-03-01 Bundesdruckerei Gmbh Verfahren zur Herstellung eines Sicherheitsdokuments mit einer mikroporösen laminierfähigen Druckfolie und Sicherheitsdokument

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JPS60189488A (ja) * 1984-03-09 1985-09-26 Canon Inc 感熱転写材
DE102005017169B4 (de) * 2005-04-13 2023-06-22 Ovd Kinegram Ag Transferfolie
US20100194093A1 (en) * 2009-12-23 2010-08-05 Bank Of Canada Security devices, their production and use

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4507346A (en) * 1982-04-08 1985-03-26 Gao Gesellschaft Fur Automation Und Organisation Mbh Multilayer identification card and a method of producing it
EP0318717A2 (fr) * 1987-12-04 1989-06-07 GAO Gesellschaft für Automation und Organisation mbH Document avec des reliefs pour éviter sa falsification et procédé de fabrication d'un tel document
US6004419A (en) * 1994-12-27 1999-12-21 Dai Nippon Printing Co., Ltd. Heat transfer printing process for producing raised images
DE60036341T2 (de) 1999-07-23 2008-01-10 Dainichiseika Color & Chemicals Mfg. Co., Ltd. Verfahren zur Herstellung von bedruckten Artikeln
DE60131180T2 (de) 2000-09-11 2008-08-07 Arjowiggins Security Sicherheitsblatt, das eine durchsichtige oder transluzente schicht enthält
DE10047460A1 (de) 2000-09-21 2002-04-11 Orga Kartensysteme Gmbh Personalisiertes Sicherheitserzeugnis
DE10247591A1 (de) * 2002-10-11 2004-04-22 Giesecke & Devrient Gmbh Wertdokument
EP1518708B1 (fr) 2003-09-25 2006-08-30 Dai Nippon Printing Co., Ltd. Feuille pour le transfert thermique d'une couche protectrice et impression protégée par ladite couche
EP1683826A2 (fr) * 2005-01-25 2006-07-26 Hansgeorg Neubig Procédé de fabrication d'une structure en relief tridimensionnel sur la surface d'un support, composite stratifié pour la préparation d'un tel procédé et utilisation d'une structure en relief préparée au moyen de ce procédé
WO2008011919A1 (fr) 2006-07-28 2008-01-31 Ilford Imaging Switzerland Gmbh Matériaux flexibles pour applications optiques
DE102007052947A1 (de) 2007-10-31 2009-05-07 Bayer Materialscience Ag Verfahren zur Herstellung eines Polycarbonat-Schichtverbundes
DE102010035890A1 (de) 2010-08-30 2012-03-01 Bundesdruckerei Gmbh Verfahren zur Herstellung eines Sicherheitsdokuments mit einer mikroporösen laminierfähigen Druckfolie und Sicherheitsdokument

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EP3060409A1 (fr) 2016-08-31
EP3060409B1 (fr) 2021-05-12
WO2015059074A1 (fr) 2015-04-30

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