US20070017647A1 - Security paper and method for the production thereof - Google Patents

Security paper and method for the production thereof Download PDF

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Publication number
US20070017647A1
US20070017647A1 US10/544,182 US54418204A US2007017647A1 US 20070017647 A1 US20070017647 A1 US 20070017647A1 US 54418204 A US54418204 A US 54418204A US 2007017647 A1 US2007017647 A1 US 2007017647A1
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Prior art keywords
layer
lacquer
lacquer layer
substrate
security paper
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US10/544,182
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English (en)
Inventor
Klaus Habik
Christoph Mengel
Jorg Langer
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Giesecke and Devrient GmbH
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Giesecke and Devrient GmbH
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Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Assigned to GIESECKE & DEVRIENT GMBH reassignment GIESECKE & DEVRIENT GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LANGER, JORG, MENGEL, CHRISTOPH, HABIK, KLAUS
Assigned to GIESECKE & DEVRIENT GMBH reassignment GIESECKE & DEVRIENT GMBH TO CORRECT ERROR ON ASSIGNMENT RECORDED AT REEL 018352 AND FRAME 0111. Assignors: LANGER, JORG, MENGEL, CHRISTOPH, HABIK, KLAUS
Publication of US20070017647A1 publication Critical patent/US20070017647A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0036—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or layers dried without curing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0045—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or film forming compositions cured by mechanical wave energy, e.g. ultrasonics, cured by electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams, or cured by magnetic or electric fields, e.g. electric discharge, plasma
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0054—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or film forming compositions cured by thermal means, e.g. infrared radiation, heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2425/00—Cards, e.g. identity cards, credit cards
    • 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
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/18—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising waxes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/26—Aminoplasts
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/32—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming a linkage containing silicon in the main chain of the macromolecule
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • D21H19/824—Paper comprising more than one coating superposed two superposed coatings, both being non-pigmented
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/27—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
    • Y10T428/273—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.] of coating

Definitions

  • This invention relates to a security paper for producing value documents, such as bank notes, passports, identification documents or the like, having a flat substrate provided at least partly with a dirt-repellent protective layer for extending the life time and fitness for circulation.
  • the invention further relates to a value document having such a security paper and to a method for producing such a security paper.
  • Value and security prints such as bank notes, shares, bonds, certificates and coupons, checks, high-quality admission tickets, but also other papers at risk of forgery, such as passports, or other identification documents, are often provided with elaborate printed images to increase their falsification security.
  • Printing processes that are technically sophisticated and not accessible to everyone, such as intaglio printing, are used at least for some of the picture elements here.
  • security elements which are difficult to imitate and permit even a layman to check the authenticity of the print or the document.
  • security elements can be for example windowed security threads which are visible in certain areas on the surface of the paper of value, applied foils which have a transparent or metallized embossed hologram, blind embossings, so-called “latent images” produced by printing technology or by printing and embossing technology which render different information from different viewing angles, prints containing optically variable pigments and producing different color effects depending on the viewing angles, or prints comprising metallic effect ink which have metallic luster for example in a gold, silver or bronze tone.
  • An important component of value documents is their flat substrate which preferably consists predominantly of cotton paper and whose typical haptics is also influenced by the one-sided or two-sided calendering during steel engraving.
  • the haptic character of a bank note is manifested mainly by its feel and its flexural stiffness; it furthermore has a characteristic sound when being deformed and creased.
  • the print EP 0 256 170 B2 proposes providing printed bank notes with a protective layer which contains cellulose ester or cellulose ether for the greater part and micronized wax for a lesser part and which is applied to the bank notes all over.
  • the micronized wax is dispersed by kneading or mixing with oil, an ink binder or a mixture thereof.
  • the sheets freshly printed with the protective layer can be stacked without difficulties without any black ink from one sheet staining the sheet therebelow.
  • the print WO 00/00697 discloses a security paper for bank notes having a dirt-repellent coating which despite the coating remains largely unchanged in its typical properties, such as printability, sound and color, compared to an uncoated paper.
  • a coating composition containing only a binder and no fillers is applied to the bank note paper, which has a large surface area or high surface roughness due to its porosity.
  • the composition is applied in a layer thickness such that a smooth surface and thus little possibility for dirt deposit results, on the one hand, and the coating is thin enough not to impair the other stated properties of the paper, on the other hand.
  • Known protective layers have in common that the wearing protection is not particularly high.
  • Conventional protective layers comprising water-based lacquers usually fail to completely meet a demanding requirement profile. For example, very good dirt repellence and adhesion quality go against resistance to the penetration of liquid, and vice versa.
  • Water-based lacquers therefore currently meet the high requirements for a protective layer in security printing and in particular bank-note printing only if a second component in the form of a crosslinking agent is added. Since such crosslinking agents are very reactive themselves, the operating staff must be sensitized to risks and suitable protective measures taken.
  • the invention is therefore based on the problem of specifying a security paper and method for producing it which avoids the disadvantages of the prior art.
  • the security paper should have a longer life time due to good dirt repellence and high resistance to the penetration of liquid.
  • the protective layer comprises at least two lacquer layers, a first lower lacquer layer being formed by a physically drying lacquer layer applied to the substrate which makes contact with the substrate therebelow and closes its pores, and a second upper lacquer layer being present which protects the substrate from physical and chemical influences and ensures good protection against the penetration of liquids and ink penetration.
  • UV lacquers Radiation-curing lacquers and in particular UV-drying lacquers (hereinafter “UV lacquers”) have the disadvantage that residual monomers and free photoinitiators as a rule remain as very reactive components in the depressions and pores of the substrate after radiation curing in dependence on the substrate quality, the radiated power, the initiator system and the monomer system (UV: ultraviolet).
  • the flat substrate of the security paper is formed in particular by an unprinted or printed cotton paper.
  • the cotton paper of security and value documents, such as bank notes, has high porosity and surface roughness with microscopic projections and cavities where residual monomers and photoinitiators of the radiation-curing lacquer layer would be deposited without the inventive use of a lower lacquer layer.
  • the lower lacquer layer is advantageously formed by a water-based dispersion lacquer layer. It is expediently applied to the substrate in a layer thickness such that it forms a smooth and contiguous layer on the substrate.
  • the lower lacquer layer is advantageously elastic, so as to avoid cracks from forming in the lacquer layer through mechanical motions or swelling of the fiber, e.g. through moisture absorption. This has the advantage of longer retaining the haptics typical of bank notes, that is, the flexural stiffness and sound, under stress. This has a positive effect in particular under extreme climatic and mechanical stress.
  • the elastic lacquers preferably comprise polyurethane systems which give the lacquer its elasticity.
  • the upper lacquer layer is preferably a radiation-curing and/or physically drying lacquer layer and particularly preferably comprises silicones and/or waxes to improve the dirt-repellent properties.
  • the radiation-curing lacquer layer is a UV-crosslinking lacquer layer (hereinafter “UV lacquer”).
  • UV lacquer UV-crosslinking lacquer layer
  • Its extremely high physical and chemical resistance permits a corresponding qualitative increase and adaptation of the requirement profile.
  • the higher physical resistance causes in particular high abrasion resistance and an extension of the life time of the security paper.
  • the higher chemical resistance furthermore makes the protective layer a long-term stable, effective barrier against water vapor and liquids, such as ink.
  • UV lacquer offers a multitude of possibilities for selectively influencing the haptics of a security paper, in particular bank note. Adjusting the parameters of brittleness, luster and smoothness of the uppermost protective layer makes it possible to directly influence the haptic properties of the coated paper in diverse ways, in particular its flexural stiffness, smoothness and sound.
  • the composition of the UV lacquer layer is advantageously selected particularly with respect to brittleness and surface tension so as to obtain a predetermined haptics of the security paper, in particular a predetermined smoothness, flexural stiffness and/or sound.
  • the physically drying layer as the upper lacquer layer alternatively comprises water-based dispersions, preferably without a polyurethane component, e.g. based on styrene-acrylic.
  • the upper lacquer layer may contain a hybrid lacquer containing both physically drying components, such as a water-based dispersion lacquer component, and a radiation-curing lacquer component.
  • a hybrid lacquer containing both physically drying components, such as a water-based dispersion lacquer component, and a radiation-curing lacquer component.
  • the water component is first removed physically, e.g. by heat, and then the radiation-curing lacquer component cured e.g. by means of UV radiation.
  • Suitable hybrid lacquers are for example aqueous dispersions based on aliphatic urethane acrylates and suitable monomers or reactive oligomers, in particular acrylates with photoinitiators.
  • the upper lacquer layer is applied directly to the lower lacquer layer.
  • a further lacquer layer comprising water-based dispersion lacquer can be provided between the upper and lower lacquer layers.
  • the lacquer layers of the protective layer are expediently coordinated with each other in their adhesion properties so as to form a highly resistant bond.
  • the composition of the lower lacquer layer is selected so as to ensure optimal adhesion of the subsequently applied radiation-curing lacquer.
  • an optimization of the wettability of the lower lacquer layer is obtained by reducing the glass transition temperature of the lacquer system. This causes both higher adhesion and improved adhesion promotion.
  • the upper lacquer layer or the lower lacquer layer is transparent and colorless.
  • both lacquer layers can also advantageously be formed to be transparent and colorless. The protective effect and the adjustability of the haptics of the security paper are still completely retained.
  • At least the upper lacquer layer has antibacterial fungus proofing.
  • the lower lacquer layer is present on the substrate in a coating weight of from 1 to 6 g/m 2 , preferably 2 to 4 g/m 2 .
  • the layer thicknesses must suffice to close the irregular depressions and pores of the flat substrate.
  • the upper lacquer layer it suffices if it is present on the substrate with a slightly lower coating weight of from 0.5 to 3 g/m 2 , preferably 1 to 2 g/m 2 . This corresponds for the preferred range in the uncrosslinked state to an amount of approx.
  • UV systems are so-called “100% systems” (100% solids content). With surfaces already smoothed and/or compressed by previous intaglio printing the values tend to be in the lower range, while with raw paper or the backs of intaglio printed pages they tend to be in the upper range.
  • the substrate is printed with characters or patterns and the protective layer is applied, to the printed substrate. This also protects the print.
  • the protective layer can also contain gaps, for example in the form of characters or patterns, in which optically variable elements or other security elements have been incorporated or will be incorporated at a later time.
  • the protective layer is applied to the substrate all over. It can likewise be expedient, as with a bank note for example, if the flat substrate of the security paper is provided with the dirt-repellent protective layer on its two main faces.
  • the invention also includes a value document, such as a bank note, coupon, certificate, passport, identification document or the like, which has a security paper of the described type.
  • a value document such as a bank note, coupon, certificate, passport, identification document or the like, which has a security paper of the described type.
  • a flat substrate is supplied in a step a), and a dirt-repellent protective layer applied to the substrate in a step b).
  • the protective layer is applied by first applying a physically drying lacquer layer to the substrate as the lower layer of the protective layer to make contact with the substrate therebelow and close its pores in a step b 1 ), and applying a lacquer layer which protects the substrate from physical and chemical influences as the upper layer of the protective layer in a step b 2 ).
  • the lower lacquer layer is dried before the upper lacquer layer is applied. Drying can be effected simply during a sufficiently long waiting time, for example during transport of a sheet over a sufficiently long transport path.
  • fast lacquering it is expedient in terms of production engineering and economy to accelerate physical drying by additional measures.
  • dryers which have a hot-air blower and/or an infrared emitter.
  • the invention offers particularly great advantages if the flat substrate supplied is a printed or unprinted cotton paper.
  • a printed image is printed on the substrate prior to application of the protective layer.
  • a printed image can be printed on the lower lacquer layer after application of the lower lacquer layer to the substrate.
  • the upper lacquer layer is then applied to the lower lacquer layer and to the printed image which is typically not all-over. It is of course also conceivable for the upper lacquer layer to be also printed.
  • the lower, upper or both lacquer layers are advantageously applied by a flexographic printing process.
  • the lacquer layers are expediently thereby applied in an amount of coating of from 1 to 8 g/m 2 .
  • the lower, upper or both lacquer layers are applied by a screen printing process.
  • the lacquer layers are expediently applied in an amount of coating of from 5 to 15 g/m 2 .
  • the lower and/or upper lacquer layer is applied by the offset printing process, by dry offset or by the indirect letterpress printing process.
  • the flat substrate supplied in step a) is a paper-of-value sheet comprising a multiplicity of single copies for which steps b), b 1 ) and b 2 ) are carried out at the same time.
  • the lower and upper lacquer layers are applied to the substrate especially advantageously in-line, i.e. in one run, in a sheet-fed lacquering machine.
  • the apparatus for carrying out the described method preferably comprises a first lacquering module for applying the lower, physically drying lacquer layer to the substrate, an intermediate dryer for drying the lower lacquer layer, a second lacquering module for applying the upper lacquer layer, and a final dryer for curing and/or drying the upper lacquer layer.
  • the first and/or second lacquering module is formed by a flexographic printing unit with a chambered doctor blade, anilox roller and plate cylinder.
  • the anilox roller advantageously has small cells whose volume and/or density determines the lacquer application rate.
  • the chambered doctor blade lies against the anilox roller, filling the cells and scraping off surplus lacquer at the same time.
  • the anilox roller transfers lacquer to the plate cylinder which is preferably formed by a rubber blanket.
  • the rubber blanket finally transfers lacquer to the flat substrate, in particular a paper sheet or paper web.
  • a lacquer conditioning device is preferably provided for adjusting the viscosity of the lacquer and the crosslinker concentration.
  • the lacquer conditioning device expediently has a tempering device for adjusting the viscosity and flow behavior of the lacquer. Since there are thus only two influencing variables for the lacquer application rate, namely cell volume and viscosity of the lacquer, such a flexographic printing unit with a chambered doctor blade permits realization of a lacquering method by which a uniform, homogeneous and cohesive lacquer film can be applied to the whole sheet reproducibly and over a very long time period.
  • the intermediate dryer is advantageously a controllable IR-hot air combination dryer (IR: Infrared). It is likewise expedient if two dryer modules are used in the intermediate dryer so that sufficient drying is guaranteed even at high speed.
  • the final dryer preferably has power-controlled UV drying modules which are coordinated with the wavelength required for curing the upper lacquer layer and with the layer thickness thereof.
  • the elastic lacquer is an aqueous dispersion based on styrene-acrylic polyurethane (designation: L51073 from the company Pröll).
  • the upper, second lacquer layer is applied over the first lacquer layer with a 9 cm 3 /m 2 roller at an application rate of approx. 1.8 g/m 2 dry in the lacquering unit 2 .
  • the second lacquer is a UV lacquer (designation: UV L50733+UV L50734, mixing ratio 3:2, from the company Pröll).
  • the two-ply coating is produced as described under Example 1, with the exception that a 20 cm 3 /m 2 roller is used and the lacquer applied at an application rate of approx. 2.0 g/m 2 dry in the lacquering unit 2 .
  • the second lacquer is a hybrid lacquer (designation: L50807+L50806, mixing ratio 1:1, from the company Pröll).
  • the lower elastic lacquer layer is applied to a cotton paper with a 13 cm 3 /m 2 roller at an application rate of approx. 1.3 g/m 2 dry in lacquering unit 1 .
  • the elastic lacquer is an aqueous dispersion based on styrene-acrylic polyurethane (designation L51073 from the company Pröll).
  • the upper second lacquer layer is applied over the first lacquer layer with a 13 cm 3 ⁇ m 2 roller at an application rate of approx. 1.3 g/m 2 dry in the lacquering unit 2 .
  • the second lacquer is a styrene-acrylic-based aqueous dispersion.
  • FIG. 1 shows a detail of a cross section through a bank note with a two-layered protective layer according to one embodiment of the invention
  • FIG. 2 shows the layer structure of the bank note of FIG. 1 in a schematic representation
  • FIGS. 3 and 4 show the layer structure of further designs of bank notes according to embodiments of the invention.
  • FIG. 5 shows a schematic representation of a sheet-fed lacquering plant for performing the invention.
  • FIGS. 1 and 2 show in cross section the structure of a bank note 10 with a two-layered protective layer 14 according to one embodiment of the invention.
  • the protective layer 14 applied to the paper fiber composite 12 of the cotton paper includes a lower lacquer layer 16 comprising a water-based dispersion lacquer and an upper lacquer layer 18 comprising a UV-curing lacquer applied thereto.
  • the lower lacquer layer 16 makes the necessary contact with the paper fiber composite 12 and at the same time closes its capillaries.
  • the lacquer layer 16 is applied in an amount of coating so as to form a smooth and cohesive surface which ensures optimal adhesion of the subsequently applied UV lacquer.
  • the composition of the UV lacquer 18 is selected so as to obtain the desired haptic and dirt-repellent properties of the bank note.
  • the brittleness of the UV lacquer is adjusted so as to yield desired haptics and sound of the bank note.
  • the dirt-repellent properties of the bank note are determined substantially by the selected surface tension of the UV lacquer.
  • the high physical and chemical resistance of the TV lacquer gives the bank note 10 high abrasion resistance and great resistance to the penetration of water vapor and liquids.
  • the variability existing in the selection of the material parameters of the UV lacquer also makes it possible to realize new properties with respect to haptics and sound of the bank notes that were hitherto hardly attainable in security printing.
  • the water-based dispersion lacquer 14 is applied to the cotton paper 12 in a coating weight of 3 g/m 2 , the UV lacquer 18 in a coating weight of 1.5 g/m 2 .
  • the water-based dispersion lacquer 14 has a styrene-acrylic polymer and the UV lacquer 18 an acrylate system in this embodiment.
  • FIGS. 1 and 2 show the protective layer 14 on an unprinted paper
  • the substrate 12 can obviously also be already printed. This is shown schematically in FIG. 3 .
  • a printed image 20 comprising characters or patterns is printed on the cotton paper 12 of a bank note 10
  • the protective layer 14 is applied to the printed image 20 and the substrate 12 .
  • a printed image 22 can also be disposed between the lower lacquer layer 14 and the upper UV lacquer layer 16 , as shown in the representation of FIG. 4 .
  • FIG. 5 shows a sheet-fed lacquering machine 30 for applying an inventive combination coating comprising two lacquer layers.
  • the sheet-fed lacquering machine 30 comprises a lacquer conditioning device (not shown), two lacquering units 32 and 36 , an intermediate dryer 34 and a final dryer 38 .
  • the lacquer conditioning device serves to adjust the viscosity of the lacquer and the crosslinker concentration.
  • a tempering device adjusts the viscosity and flow behavior of the UV lacquer.
  • the first and second lacquering units 32 , 36 are each formed by a modern flexographic printing unit with a chambered doctor blade, anilox roller and plate cylinder.
  • the anilox roller has tiny cells whose volume determines the lacquer application rate.
  • the chambered doctor blade lies against the anilox roller, filling the cells and scraping off surplus lacquer at the same time.
  • the anilox roller transfers lacquer to the plate cylinder which is formed by a rubber blanket in this embodiment.
  • the rubber blanket finally transfers the lacquer to the paper-of-value sheets to be coated.
  • the protective layer can also be applied to a continuous web. This is preferred in particular for unprinted paper webs.
  • the IR-hot air combination dryer 34 used as the intermediate dryer has two dryer modules to guarantee sufficient drying even at high lacquering speed.
  • the UV lacquer layer is cured by irradiation with intensive UV light and the protective layer additionally dried with infrared radiation and hot air.
  • the power and wavelength of the drying modules of the final dryer 38 is coordinated with the required wavelength of the UV lacquer and with the layer thickness on the paper-of-value sheet.

Landscapes

  • Mechanical Engineering (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Business, Economics & Management (AREA)
  • Plasma & Fusion (AREA)
  • Paper (AREA)
  • Laminated Bodies (AREA)
  • Printing Methods (AREA)
  • Credit Cards Or The Like (AREA)
  • Burglar Alarm Systems (AREA)
US10/544,182 2003-02-11 2004-02-03 Security paper and method for the production thereof Abandoned US20070017647A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10305614 2003-02-11
DE10305614.9 2003-02-11
DE10327083.3 2003-06-13
DE10327083A DE10327083A1 (de) 2003-02-11 2003-06-13 Sicherheitspapier und Verfahren zur Herstellung desselben
PCT/EP2004/000973 WO2004072378A1 (de) 2003-02-11 2004-02-03 Sicherheitspapier und verfahren zur herstellung desselben

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US20070017647A1 true US20070017647A1 (en) 2007-01-25

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EP (1) EP1595029B8 (de)
JP (1) JP4709742B2 (de)
AT (1) ATE509158T1 (de)
AU (1) AU2004211469B2 (de)
BR (1) BRPI0407237A (de)
CA (1) CA2515420C (de)
DE (1) DE10327083A1 (de)
MX (1) MXPA05008459A (de)
MY (1) MY143722A (de)
PL (1) PL212423B1 (de)
RU (1) RU2339755C2 (de)
WO (1) WO2004072378A1 (de)

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US20100090455A1 (en) * 2006-11-21 2010-04-15 Ciba Corporation Apparatus and method for manufacturing a security product
US20100201115A1 (en) * 2007-09-20 2010-08-12 Agfa-Gevaert Nv Security laminates with interlaminated transparent embossed polymer hologram
US20100316841A1 (en) * 2008-04-01 2010-12-16 Agfa-Gevaert Lamination process for producing security laminates
US20100320743A1 (en) * 2008-04-01 2010-12-23 Agfa-Gevaert Security laminate having a security feature
US20100330304A1 (en) * 2008-04-01 2010-12-30 Agfa-Gevaert Nv Security laminates with a security feature detectable by touch
US20110146510A1 (en) * 2008-08-29 2011-06-23 Kba-Notasys Sa Method for Varnishing Security Documents, Especially Intaglio-Printed Security Document Such as Banknotes, and Varnishing Machine for Carrying Out the Same
US20110156382A1 (en) * 2008-11-04 2011-06-30 Agfa-Gevaert N.V. Security document and methods of producing it
US20110200765A1 (en) * 2008-12-22 2011-08-18 Agfa-Gevaert Security laminates for security documents
US20110204616A1 (en) * 2007-09-20 2011-08-25 Agfa-Gevaert N.V. Security laminates with interlaminated transparent embossed polymer hologram
WO2012156904A1 (fr) 2011-05-18 2012-11-22 Arjowiggins Security Feuille a haute durabilite pour la fabrication de billets de banque
FR2980491A1 (fr) * 2011-09-27 2013-03-29 Oberthur Technologies Procede de traitement de surface d'un document de securite
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WO2014067715A1 (en) 2012-10-29 2014-05-08 Sicpa Holding Sa Protective coatings for security documents
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US9012018B2 (en) 2009-12-18 2015-04-21 Agfa-Gevaert N.V. Laser markable security film
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ITVR20080065A1 (it) * 2008-06-10 2009-12-11 Cartiere Fedrigoni & C Spa Procedimento per il trattamento antisporco di banconote e/o di carta di sicurezza in generale
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FR2991627B1 (fr) * 2012-06-07 2014-11-21 Banque De France Document de securite a haute durabilite
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EP2442987B1 (de) 2009-06-16 2016-08-10 Giesecke & Devrient GmbH Folienverbundbanknote
US8827315B2 (en) 2009-12-10 2014-09-09 Agfa-Gevaert N.V. Security document with security feature on edge
US9067451B2 (en) 2009-12-18 2015-06-30 Agfa-Gevaert N.V. Laser markable security film
US9012018B2 (en) 2009-12-18 2015-04-21 Agfa-Gevaert N.V. Laser markable security film
WO2012156904A1 (fr) 2011-05-18 2012-11-22 Arjowiggins Security Feuille a haute durabilite pour la fabrication de billets de banque
US9404219B2 (en) * 2011-05-18 2016-08-02 Arjowiggins Security High-durability sheet for manufacturing bank notes
US20140116634A1 (en) * 2011-05-18 2014-05-01 Arjowiggins Security High-Durability Sheet for Manufacturing Bank Notes
WO2013045496A1 (fr) * 2011-09-27 2013-04-04 Oberthur Fiduciaire Sas Procede de traitement de surface d'un billet de banque
CN103998685A (zh) * 2011-09-27 2014-08-20 欧贝特信托公司 用于处理钞票的表面的方法
FR2980491A1 (fr) * 2011-09-27 2013-03-29 Oberthur Technologies Procede de traitement de surface d'un document de securite
RU2611503C2 (ru) * 2011-09-27 2017-02-27 Обертур Фидюсьер Сас Способ поверхностной обработки банкноты
US9827803B2 (en) 2011-12-09 2017-11-28 Giesecke+Devrient Currency Technology Gmbh Security paper, value document obtainable therefrom and method for manufacturing said paper and document
US9242481B2 (en) * 2012-09-26 2016-01-26 Oce-Technologies B.V. Method of applying a curable liquid and apparatus for performing the method
WO2014067715A1 (en) 2012-10-29 2014-05-08 Sicpa Holding Sa Protective coatings for security documents
CN103144457A (zh) * 2012-12-28 2013-06-12 允昌科技(苏州)有限公司 触控面板之油墨断差填补方法
WO2016097187A1 (fr) 2014-12-19 2016-06-23 Arjowiggins Security Procede de traitement d'un element de securite
WO2020234211A1 (en) 2019-05-22 2020-11-26 Sicpa Holding Sa Security document and manufacturing method thereof
US11712917B2 (en) 2019-05-22 2023-08-01 Sicpa Holding Sa Security document and manufacturing method thereof
WO2022207658A1 (en) 2021-04-01 2022-10-06 Sicpa Holding Sa Cationic uv-led radiation curable protective varnishes for security documents

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MY143722A (en) 2011-06-30
EP1595029A1 (de) 2005-11-16
WO2004072378A1 (de) 2004-08-26
PL376306A1 (en) 2005-12-27
DE10327083A1 (de) 2004-08-19
PL212423B1 (pl) 2012-09-28
AU2004211469B2 (en) 2008-07-31
CA2515420C (en) 2012-05-08
EP1595029B1 (de) 2011-05-11
MXPA05008459A (es) 2005-10-18
AU2004211469A1 (en) 2004-08-26
EP1595029B8 (de) 2011-09-28
ATE509158T1 (de) 2011-05-15
JP4709742B2 (ja) 2011-06-22
BRPI0407237A (pt) 2006-01-31
RU2339755C2 (ru) 2008-11-27
CA2515420A1 (en) 2004-08-26
JP2006517266A (ja) 2006-07-20

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