EP1023499B2 - Procédé de fabrication de feuilles de securité - Google Patents

Procédé de fabrication de feuilles de securité Download PDF

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Publication number
EP1023499B2
EP1023499B2 EP98948925.7A EP98948925A EP1023499B2 EP 1023499 B2 EP1023499 B2 EP 1023499B2 EP 98948925 A EP98948925 A EP 98948925A EP 1023499 B2 EP1023499 B2 EP 1023499B2
Authority
EP
European Patent Office
Prior art keywords
carrier film
printing
metal layer
inking
printed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98948925.7A
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German (de)
English (en)
Other versions
EP1023499B1 (fr
EP1023499A1 (fr
Inventor
Walter Schneider
Theo Burchard
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.)
Giesecke and Devrient GmbH
Original Assignee
Giesecke and Devrient 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
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Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP1023499A1 publication Critical patent/EP1023499A1/fr
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Publication of EP1023499B1 publication Critical patent/EP1023499B1/fr
Publication of EP1023499B2 publication Critical patent/EP1023499B2/fr
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Classifications

    • 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
    • D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
    • 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

Definitions

  • the invention relates to a process for the production of films, such as security film for storage or application in or on securities, consisting of a translucent carrier film and a cover layer applied thereto, the coating-free areas in the form of letters, numbers, characters, points and / or patterns , which are clearly visible especially in transmitted light.
  • packaging material For the production of packaging material, it is from the DE-A-36 10 379 It is known to first print a printed image onto the films, as it will later appear as a negative image in the metal coating, and to apply the metal coating only in a second process step. For the application of the printed image while printing inks or paints are used, which have a low adhesion to the metal coating. The metal coating is then removed mechanically by the action of an air or liquid jet or also via a mechanical scraping device. Alternatively, it is also proposed to chemically dissolve the inks under the metal coating and to provide an ultrasonic source in the solution bath. The use of particularly brittle printing inks is known.
  • the film is steamed after printing with metal and pulled after evaporation over a sharp edge when using this color.
  • the brittle paint will break and flake away, taking along the overlying metal layer and also removing it.
  • an ultrasonic bath can also be used here for removing the metal layer over the lacquer print.
  • contour-sharp characters i. H. the edges of the negative representation should be smooth and linear.
  • the known methods are in need of improvement in this regard.
  • the known methods are also time-consuming and burden partly the environment.
  • the invention has for its object to provide a method by which negative representations can be generated in metal-coated films, which are characterized by a high contour sharpness.
  • the process should be simple and environmentally friendly.
  • Essential to the invention is the finding that a color printed in a printing process with a high pigment content of at least 10% by weight in the dry printing ink after drying on the printing substrate forms a raised inking which has a porous, porous structure with a large surface area ,
  • a covering layer of small thickness applied to such an application of paint does not result in a continuous, surface-covering coating, but covers the dried color body only partially because of its large surface area and porous structure, so that the color body remains at least partially accessible from the outside for solvent.
  • a water-soluble binder is used for the paint, the application of paint and, with the application of paint, also the covering layer deposited thereon can be washed out by exposure to water. The washing can be assisted by mechanical means.
  • cover layer opaque metal coatings such as aluminum, iron, cobalt or nickel coatings are used.
  • Such a method leads to surprisingly sharp and defined edge contours and is therefore particularly suitable for producing a negative writing for security threads, which are stored in securities, such as banknotes.
  • a translucent transparent carrier sheet 10 is provided.
  • the preferred material is polyester; Other plastics can also be used provided they are translucent, have sufficient strength, and have a surface that can be printed and coated with metal.
  • the thickness of the film is about 6 to 36 microns.
  • the film is usually used in the form of endless belts, since the process is preferably carried out continuously. In the event that security threads are to be produced, the strips are cut to size after their completion.
  • the film is printed in a first step with characters, symbols or patterns.
  • the printing can be done with a common printing method, but preferably a gravure cylinder is used, since in gravure printing particularly clear edge contours and a correspondingly high paint application can be achieved.
  • the ink used is a high-pigment color.
  • the pigment content based on the dry weight of the paint, should be between about 10% and 80%, preferably about 60%, to produce the porous structure.
  • pigments preference is given to choosing natural raw materials, preferably chalk, but also bentonite, aerosil and titanium dioxide. Suitable pigments are offered by Martinswerke under the name Pergopak, by Rohm & Haas under the name Rhopaque and by Degussa under the name Aerosil. In addition, organic particles such as uncooked starch can also be used. Due to the high pigment content, the paint forms a porous, porous structure with an irregular, comparatively high surface area after drying.
  • water-soluble binders are used, so that the paint can be redissolved with water and washed off.
  • a binder for example, cooked or dissolved starch, polyvinyl alcohol (PVA) or carboxymethyl cellulose (CMC) is suitable.
  • a suitable, preferably opaque metal layer is applied, which can be removed again in the areas of the paint application.
  • the film after drying in vacuo e.g. steamed with an approximately 0.1 micron layer of aluminum.
  • nickel or another suitable metal can also be used.
  • the in the Fig. 1 and 2 20 denoted metallic coating also deposits on the paint application 30; however, due to the porous structure and the associated high surface area of paint, it does not form a coherent layer there.
  • the coating particles here the metal particles that are vapor-deposited, deposit in the pores of the paint application 30.
  • the coating particles penetrate, so to speak, in the paint application 30, so that no coherent layer is produced on the surface.
  • the porous surface area into which the metal particles have penetrated and which consequently has no coherent metal layer is in Fig. 1 hatched and designated 40.
  • the printed with the high-pigmented ink carrier sheet is then subjected to a washing process.
  • the washing liquid can easily penetrate the discontinuous coating.
  • the wash cycle is followed by the metallization.
  • the action of the washing liquid can be assisted by mechanical means such as brushing, rolling or ultrasound.
  • water can be used as a washing liquid.
  • other binders would have a corresponding organic solvent be used.
  • the film web After washing out the ink, the film web is dried and cut to form, for example, security threads, which can then be stored in paper for banknotes.
  • the film web can also be formed as a transfer film, with the help of security elements of any shape can be transferred to security documents or any other products to be secured.
  • the use as label material is possible.
  • any other effect layer e.g. a print pattern, a diffractive optical effective layer (liquid crystal pigments, interference layers, holograms, etc.) was provided.
  • a diffractive optical effective layer liquid crystal pigments, interference layers, holograms, etc.
  • the described method results in particularly sharp and well-defined edge structures of the negative representations.
  • the sharpness of the printed symbols and / or patterns is therefore particularly good, and counterfeits that do not have this quality are easy to spot.
  • the advantage of the inventive method lies in its environmental compatibility. There is no need to use harmful chemicals. Because of the use of water-soluble paints, the washed-out pigments can be removed from the wastewater by known methods. It has also been found that the inventive method is less time-consuming compared to other methods.

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  • Printing Methods (AREA)
  • Credit Cards Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Materials For Medical Uses (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Paper (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Claims (9)

  1. Procédé de fabrication de feuilles, de préférence des feuilles de sécurité pour des papiers valeur, se composant d'une feuille de support translucide et d'une couche métallique appliquée sur celle-ci, qui présente des zones dépourvues de revêtement, en forme de lettres, de chiffres, de signes, de points et/ou de motifs, etc., particulièrement faciles à reconnaître par transparence, caractérisé par les étapes suivantes :
    a) préparation de la feuille de support ;
    b) impression de la feuille de support avec des lettres, des chiffres, des signes, des points et/ou des motifs, etc. ;
    c) utilisation d'une encre d'impression soluble dans l'eau ayant une teneur en pigments élevée qui, dans l'encre d'impression sèche, représente au moins 10% en poids ;
    d) séchage de l'encre d'impression avec formation d'un revêtement de couleur poreux, saillant ;
    e) dépôt par vaporisation d'une couche métallique mince sur la feuille de support imprimée, qui n'est pas continue, en raison de la présence dans la zone imprimée du revêtement de couleur à la fois poreux et saillant, dans lequel l'épaisseur de la couche métallique métallisée sous vide s'élève à environ 0,1 µm;
    f) élimination du revêtement de couleur et de la couche métallique présente dans les zones imprimées de la feuille de support sur le revêtement de couleur, ou ayant pénétré dans le revêtement de couleur, grâce à un lavage avec de l'eau, éventuellement combiné avec une action mécanique ;
    g) séchage et, le cas échéant, découpage de la feuille de support.
  2. Procédé selon la revendication 1, caractérisé en ce que la couche métallique est une couche d'aluminium ou de nickel.
  3. Procédé selon la revendication 1, caractérisé en ce que la feuille de support est préparée sous la forme d'une bande en continu, et en ce que le procédé est mis en oeuvre sans interruption.
  4. Procédé selon la revendication 1, caractérisé en ce que l'encre d'impression contient de l'amidon, de l'alcool polyvinylique ou de la carboxyméthylcellulose comme produit liant.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que des matières primaires naturelles sont choisies comme pigments, de préférence dans le groupe constitué par la craie, la bentonite, l'aérosil et le dioxyde de titane.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que les particules de pigment présentent un diamètre équivalent moyen de 0,1 à 15 µm.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que l'impression de la feuille de support s'effectue par héliogravure.
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que le lavage est effectué à l'aide de moyens mécaniques, comme un tambour rotatif, une brosse ou par ultrasons.
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce que la feuille de support est découpée dans l'étape g) de la revendication 1 pour en faire des fils de sécurité qui présentent une largeur d'au plus 5 mm.
EP98948925.7A 1997-09-08 1998-09-07 Procédé de fabrication de feuilles de securité Expired - Lifetime EP1023499B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19739193A DE19739193B4 (de) 1997-09-08 1997-09-08 Verfahren zur Herstellung von Sicherheitsfolien für Wertpapiere
DE19739193 1997-09-08
PCT/EP1998/005668 WO1999013157A1 (fr) 1997-09-08 1998-09-07 Feuilles de securite pour papier billet de banque et leur procede de fabrication

Publications (3)

Publication Number Publication Date
EP1023499A1 EP1023499A1 (fr) 2000-08-02
EP1023499B1 EP1023499B1 (fr) 2004-05-06
EP1023499B2 true EP1023499B2 (fr) 2015-02-25

Family

ID=7841527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98948925.7A Expired - Lifetime EP1023499B2 (fr) 1997-09-08 1998-09-07 Procédé de fabrication de feuilles de securité

Country Status (8)

Country Link
EP (1) EP1023499B2 (fr)
AT (1) ATE266122T1 (fr)
AU (1) AU9537398A (fr)
DE (2) DE19739193B4 (fr)
DK (1) DK1023499T3 (fr)
ES (1) ES2217587T3 (fr)
PT (1) PT1023499E (fr)
WO (1) WO1999013157A1 (fr)

Families Citing this family (82)

* Cited by examiner, † Cited by third party
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JPH0679997A (ja) † 1991-02-20 1994-03-22 Reiko Co Ltd 部分蒸着転写箔

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DE3610379A1 (de) * 1986-03-27 1987-10-01 Helmuth Schmoock Folie mit mindestens einer von einer metallschicht ueberdeckten oberflaeche sowie verfahren und vorrichtung zu ihrer herstellung
US4685997A (en) * 1986-06-16 1987-08-11 Beckett Donald E Production of demetallized packaging material
ATE100880T1 (de) * 1988-03-04 1994-02-15 Gao Ges Automation Org Sicherheitselement in form eines fadens oder bandes zur einbettung in sicherheitsdokumente sowie verfahren zur herstellung desselben.

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JPH0679997A (ja) † 1991-02-20 1994-03-22 Reiko Co Ltd 部分蒸着転写箔

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WO1999013157A1 (fr) 1999-03-18
DE19739193B4 (de) 2006-08-03
PT1023499E (pt) 2004-09-30
EP1023499B1 (fr) 2004-05-06
EP1023499A1 (fr) 2000-08-02
DE59811343D1 (de) 2004-06-09
ES2217587T3 (es) 2004-11-01
DE19739193A1 (de) 1999-03-11
ATE266122T1 (de) 2004-05-15
AU9537398A (en) 1999-03-29
DK1023499T3 (da) 2004-08-09

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