EP0790895A1 - Feuille de securite auto-adhesive mettant en evidence toute tentative d'effraction, et son procede de production - Google Patents

Feuille de securite auto-adhesive mettant en evidence toute tentative d'effraction, et son procede de production

Info

Publication number
EP0790895A1
EP0790895A1 EP95936742A EP95936742A EP0790895A1 EP 0790895 A1 EP0790895 A1 EP 0790895A1 EP 95936742 A EP95936742 A EP 95936742A EP 95936742 A EP95936742 A EP 95936742A EP 0790895 A1 EP0790895 A1 EP 0790895A1
Authority
EP
European Patent Office
Prior art keywords
adhesive
self
layer
film
film according
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.)
Granted
Application number
EP95936742A
Other languages
German (de)
English (en)
Other versions
EP0790895B1 (fr
Inventor
Elio Fusco
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.)
Istituto Poligrafico e Zecca Dello Stato
Original Assignee
Istituto Poligrafico e Zecca Dello Stato
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 Istituto Poligrafico e Zecca Dello Stato filed Critical Istituto Poligrafico e Zecca Dello Stato
Priority to SI9530083T priority Critical patent/SI0790895T1/xx
Publication of EP0790895A1 publication Critical patent/EP0790895A1/fr
Application granted granted Critical
Publication of EP0790895B1 publication Critical patent/EP0790895B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—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

Definitions

  • the present invention relates to a self-adhesive safety film capable of indicating any attempt to tamper with documents, using holograms, and a process for the production thereof.
  • the main object of the present invention is to provide a film that, when cut and reduced to a suitable shape and size, is destined to be applied to an object, for example a document, to indicate and in this way also prevent any attempt to tamper with that document.
  • an object for example a document
  • the film, arranged in a suitable manner will prevent the alteration of data, replacement of photographs or other paper object attached to the document and forming an integral or complementary part thereof, and likewise the replacement of any part of the document itself.
  • the metal layer reacts at any attempt to detach, fracturing and adhering in part to the film and in part to the object to be protected; in both these examples the film, which is already plated and treated with suitable lakes, is made to undergo embossing to receive the holographic imprint with the desired design or picture, but in any case the film is fully plated and prevents vision of the elements (whether written or other) written or printed or shown in the area to be protected from tampering, and onto which the film has been applied.
  • the holographic technique is again used to obtain (as far as possible) a safety film incapable of being forged, in order to prevent any form of reconstruction on the part of forgers.
  • a safety film incapable of being forged, in order to prevent any form of reconstruction on the part of forgers.
  • the safety film according to the present invention is formed, in this order, of: transparent film in polyester, PVC or other equally transparent material and of suitable mechanical strength, capable of undergoing a holographic embossing operation; a hologram is embossed on the back of said film, said hologram optionally containing information invisible to the naked eye, but visible using laser reading instruments and capable of being displayed on viewers, displays or, if the reading device is connected to a personal computer, on the monitor, of the OSC HOLOSCOPE or HOLOCODE type.
  • the area occupied by the hologram is limited and of the geometrical shape desired.
  • the hologram is made up of the following layers: a) release layer, that is to say a layer of a product with a synthetic and/or natural wax base, silicon substances, in either simple or complex mixtures, with a thickness of a few micrometers, b) layer of paint or lake for registration of the holographic information, that is to say of thermoformable lake that acquires the holographic imprint at a moderately high temperature and maintains it at ordinary temperatures and at higher temperatures of up to 150° and above, with a thickness of a few micrometers, c) layer of reflecting metal, for example aluminium, but also of another equally ⁇ "•- ⁇ -fleeting metal element, with a thickness of a few hundredths of a micrometer.
  • the transparent film and the three embossable layers a) , b) , c) are normally commercially available under various names under the trade name of "films for holographic embossing" ; a layer of glue for hot-application, of the type that tempers under the action of pressure and high temperature (up to 120 ⁇ 140°C) , based on a mixture of silicon substances in a water solution a layer of cold adhesive glue, with an acrylic resin base, water soluble, such as NACOR 9863 manufactured by the National Starch Chemical Company, or the like, modified with additives, spread in solution with a percentage of solids of 50 ⁇ 60% and in such a way as to obtain a dry thickness of approximately 10 micrometers a layer of removable, non-adhesive, silicon coated paper, to preserve the film described above and to facilitate its application.
  • a layer of glue for hot-application of the type that tempers under the action of pressure and high temperature (up to 120 ⁇ 140°C) , based on a mixture
  • the safety function of the film described is seen when, having removed the layer of silicon paper protecting the self-adhesive glue, the film is applied to the document or object to be protected.
  • the self-adhesive glue sticks the film to the surface of the document, and, as it is distributed over the whole surface, comprising the metal coated and embossed, that is to say holographed, areas, it also sticks the hologram to the document or object to be protected.
  • the hologram In applying the film to the document or object to be protected from alteration or falsification the hologram must naturally be positioned in a suitable way, for example covering in part any photograph of the owner of the document and in part the surface of the sheet of paper on which it is positioned, or else the hologram must be positioned close to the information to - 5 - be protected without covering it, or it must be repeated at the edges of the film, corresponding to the edges of the sheet of paper on which the film is to be applied.
  • a polyester, polychlorurvinyl or other film (layer 1 of figure 1) is spread with a suitable release lake (layer 2) , then with lake suitable to record the holographic information (layer 3) and finally the whole is covered with a reflecting metal layer deposited with vacuum plating or another process capable of depositing an extremely thin layer of metal (a few hundredths of a micrometer) (layer 4) ; the composite material obtained in this way is made to undergo an embossing process with a holographic matrix to obtain images, which are confined to small areas of suitable size and shape, spaced and positioned according to the needs dictated, for example, by the size of the sections of film to be made, and/or the position of the information, photograph, and elements to be protected (figure 2) on a document; - after further working the structure of figure 3 is created, in which on the composite film made up of the film (layer 1) , with the release lake (layer 2) , the holographic recording layer (layer 3)
  • figure 6 illustrates the method of application of the film (detail a) to documents, with the possible position of the holograms (detail b) in order to protect the document from tampering.

Landscapes

  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Holo Graphy (AREA)
  • Adhesive Tapes (AREA)
  • Credit Cards Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

Feuille de sécurité transparente constituée d'une structure auto-adhésive mince comportant des hologrammes métalliques réfléchissants et parfaitement visibles répartis de manière appropriée dans certaines zones, de sorte que l'on peut voir les informations présentes à la surface du document ou objet à protéger. On décrit également le procédé de fabrication de cette feuille.
EP95936742A 1994-11-16 1995-11-14 Feuille de securite auto-adhesive mettant en evidence toute tentative d'effraction, et son procede de production Expired - Lifetime EP0790895B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9530083T SI0790895T1 (en) 1994-11-16 1995-11-14 Self-adhesive safety film for indication of tampering, and relative process for the production thereof

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITRM940748 1994-11-16
ITRM940748A IT1275083B (it) 1994-11-16 1994-11-16 Pellicola di sicurezza autoadesiva atta ad evidenziare tentativi di manomissione e relativo procedimento di produzione
PCT/IT1995/000184 WO1996014992A1 (fr) 1994-11-16 1995-11-14 Feuille de securite auto-adhesive mettant en evidence toute tentative d'effraction, et son procede de production

Publications (2)

Publication Number Publication Date
EP0790895A1 true EP0790895A1 (fr) 1997-08-27
EP0790895B1 EP0790895B1 (fr) 1998-09-16

Family

ID=11402821

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95936742A Expired - Lifetime EP0790895B1 (fr) 1994-11-16 1995-11-14 Feuille de securite auto-adhesive mettant en evidence toute tentative d'effraction, et son procede de production

Country Status (8)

Country Link
EP (1) EP0790895B1 (fr)
AT (1) ATE171116T1 (fr)
AU (1) AU3855095A (fr)
DE (1) DE69504861T2 (fr)
DK (1) DK0790895T3 (fr)
ES (1) ES2122693T3 (fr)
IT (1) IT1275083B (fr)
WO (1) WO1996014992A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6372341B1 (en) 1998-04-27 2002-04-16 3M Innovative Properties Company Tampa-indicating article for reusable substrates
US6351537B1 (en) 1998-10-05 2002-02-26 3M Innovative Properties Company Verifiable holographic article

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4971646A (en) * 1989-03-21 1990-11-20 Schell Russell W Method for forming a hologram film laminate and the hologram laminated product formed thereby
US5350199A (en) * 1993-09-17 1994-09-27 Young Aurelia G Security facsimile paper

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9614992A1 *

Also Published As

Publication number Publication date
ITRM940748A0 (it) 1994-11-16
EP0790895B1 (fr) 1998-09-16
IT1275083B (it) 1997-07-30
DK0790895T3 (da) 1999-03-01
DE69504861D1 (de) 1998-10-22
DE69504861T2 (de) 1999-03-04
AU3855095A (en) 1996-06-06
ITRM940748A1 (it) 1996-05-16
WO1996014992A1 (fr) 1996-05-23
ATE171116T1 (de) 1998-10-15
ES2122693T3 (es) 1998-12-16

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