EP0500726B1 - Watermarked plastic support - Google Patents

Watermarked plastic support Download PDF

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Publication number
EP0500726B1
EP0500726B1 EP90917296A EP90917296A EP0500726B1 EP 0500726 B1 EP0500726 B1 EP 0500726B1 EP 90917296 A EP90917296 A EP 90917296A EP 90917296 A EP90917296 A EP 90917296A EP 0500726 B1 EP0500726 B1 EP 0500726B1
Authority
EP
European Patent Office
Prior art keywords
fact
mark
opacity
substrate
composition
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.)
Revoked
Application number
EP90917296A
Other languages
German (de)
French (fr)
Other versions
EP0500726A1 (en
Inventor
Christophe Halope
Alain Barthez
Jean-Paul Menez
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.)
ArjoWiggins SAS
Original Assignee
ArjoWiggins SAS
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Filing date
Publication date
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Application filed by ArjoWiggins SAS filed Critical ArjoWiggins SAS
Priority to AT90917296T priority Critical patent/ATE89514T1/en
Publication of EP0500726A1 publication Critical patent/EP0500726A1/en
Application granted granted Critical
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Anticipated expiration legal-status Critical
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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
    • B41M3/10—Watermarks
    • 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
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
    • B41M5/508—Supports
    • 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
    • B42D25/333—Watermarks
    • 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
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/369—Magnetised or magnetisable materials
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/373—Metallic materials
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/382—Special inks absorbing or reflecting infrared light
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • 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
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24835—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including developable image or soluble portion in coating or impregnation [e.g., safety paper, etc.]
    • 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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/252—Glass or ceramic [i.e., fired or glazed clay, cement, etc.] [porcelain, quartz, etc.]
    • 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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers

Definitions

  • the present invention relates to a watermarked printable plastic support containing security marks having an effect resembling that of watermarks. These marks are subsequently designated under the term pseudo watermarks.
  • watermark sheets of paper It is common to watermark sheets of paper.
  • the watermarking of the paper can be done in different ways depending on whether watermarks called “real” or artificial watermarks called “pseudo watermarks" are produced.
  • fiduciary and security papers have watermarks which are obtained, during the manufacture of the sheet of paper, by round shapes comprising intaglio and / or relief imprints or by means of watermark rollers comprising drawings. recessed and / or raised associated with a flat table (Fourdrinier machine).
  • the light areas are due to the fact that the sheet thickness and the density of the fibers are smaller than the sheet thickness and the density of the fibers in the areas where the watermark has not been imprinted .
  • the dark areas are due to the fact that the thickness of the sheet and the density of the fibers are greater.
  • pseudo watermarks by printing or depositing a composition, generally fatty, which permanently transparentizes the sheet of paper. Transparentization can also be done using a hot-melt material; in patent application EP-203499 this material is a polyethylene.
  • Patent application FR-2 353 676 describes a process using an opacity modifying agent, namely which increases the opacity or, in a variant, which decreases the opacity.
  • This agent can be an aqueous suspension of a pigment or a filler or a solution of a chemical compound, a colored compound or a dye. This agent is applied during the manufacture of the sheet, on the fibrous web and before its removal from the fabric, so that said agent penetrates into the interstices of the web and causes a change in the opacity of the web to be treated in the selected areas, after drying.
  • This technique has the disadvantage of requiring special roller devices to apply this agent and preferably using a suction device to penetrate the agent into the interstices of the sheet.
  • US Patent 4,520,063 describes a synthetic resin sheet containing security marks similar to a watermark. Two dyes are applied having different migration rates in the sheet, the migration of the one migrating the fastest being stopped by the crosslinking of a crosslinking agent contained in the sheet or added to the dye. One observes, in reflected light a pattern which has the color of this dye on the surface of the sheet, and in transmitted light a pattern of mixed color is observed.
  • This method of producing a pseudo watermark in a plastic sheet is delicate because it requires an unobvious selection of dyes having different migration speeds in a given material and it requires a crosslinking operation.
  • Such documents may be diplomas, the diplomas having to last for at least the entire life of its holder. he can also other documents, particularly of value, such as titles, banknotes, identity cards, passports.
  • An object of the invention is therefore to provide a sheet made in particular of synthetic material which is printable and which includes authentication or security marks which are not very visible and even invisible in reflected light and perfectly visible in transmitted light.
  • Another object of the invention is to prevent counterfeiters or imitators from reproducing such marks of authenticity.
  • a third object of the invention is to provide a process for manufacturing such a sheet, this process being rapid and economical.
  • a sheet made in particular of synthetic material can be pseudo-watermarked by deposition or printing of a composition modifying the opacity at determined locations on a substrate of synthetic material.
  • This composition is then covered with a printable pigmented layer. It is remarkable that the marks obtained are not or hardly visible in reflected light and visible in transmitted light. This process is advantageously simple.
  • Another notable advantage of this method is that it allows the creation of pseudo watermarks of several tones (shades from light to dark, for example shaded); this type of watermark is more difficult to imitate and has more authentication data than a solid watermark.
  • the counterfeiters produce false watermarks by depositing a composition modifying the opacity at the places suitably chosen on the surface of a sheet of paper.
  • this method of counterfeiting is not possible.
  • the counterfeiter obtains commercially from a sheet of synthetic material coated with a printable layer, for example POLYART® manufactured and sold by the company ARJOBEX, several solutions arise.
  • the counterfeiter could dissolve the printable surface layer of POLYART® using solvent, then deposit a composition modifying the opacity in the desired locations, and then deposit the printable layer again on the surface.
  • the counterfeiter could obtain a sheet of synthetic material not coated with the printable layer, then deposit a composition modifying the opacity and then deposit a printable surface layer.
  • the brand is mono or polychrome.
  • the composition modifying the opacity is a pigmentary and / or colored, and / or fluorescent composition, it can be produced in an aqueous medium, in a non-aqueous solvent medium, or in a mixed water-solvent medium.
  • this composition is pigmentary, it preferably contains a mineral filler, for example titanium dioxide. It can also contain colored pigments.
  • the list of dyes suitable for the invention is not limited.
  • the composition modifying the opacity comprises at least one mineral filler and / or at least one pigmentary and / or soluble dye and / or at least one fluorescent agent, at least one binder or varnish, optionally at least one dispersant and optionally others additives.
  • composition modifying the opacity is advantageously a colored and / or fluorescent ink.
  • any basic synthetic substrate can be used to carry out the invention. It is preferable to use a film or a sheet made up of at least one polyolefin, in particular polyethylene or polypropylene. More particularly, the basic synthetic substrate contains essentially polyethylene, is formed by extrusion and is bi-stretched. This film may advantageously have undergone a chemical or Corona discharge treatment on its surface in order to improve its receptivity to the various compositions with which it will be coated.
  • the printable pigment composition is preferably a composition comprising a preferably mineral filler, at least one dispersant, at least one binder, optionally an insolubilizing agent, optionally an antistatic agent, optionally a pH regulating agent and optionally other additives.
  • additives can, for example, be anti-foaming agents, viscosity regulating agents, waxes.
  • Such a pigment composition may, for example, be chosen from those described in British patent GB 2,177,413. Other formulas making it possible to improve the printability may be suitable. Some compositions kill the fluorescence of the undercoat. A person skilled in the art will know how to adapt this composition to the chosen undercoat.
  • fillers are in the form of fine powders (average particle size less than 10 micrometers in general).
  • plastic pigments binders of acrylonitrile-vinylidene copolymers, of polystyrene for example.
  • any fluorescent agent may be suitable, however it is necessary to test this agent because certain agents exhibit fluorescence in a given environment and no fluorescence under other conditions. It may also be important that these agents exhibit good resistance to visible or invisible light, this depends on the use of the finished product. Agents which more particularly exhibit phosphorescence are not excluded.
  • a preferred method of producing a sheet according to the invention consists in printing at least once preferably, by photogravure, at least one of the faces of the basic plastic substrate by means of at least one opacity modifying composition. , then to lay on this or these faces, and possibly on the other face, the pigmented layer printable with one of the coating means used in the field of printing or the paper industry.
  • composition modifying the opacity taken in particular in the techniques of printing or the graphic arts may be suitable, but gravure printing is the method which provides the most regular and uniform deposit.
  • the composition modifying the opacity is deposited in one or more installments at places chosen above the first deposit.
  • the same composition or another composition can be used.
  • the marks obtained according to the invention form a pseudo watermark which can also be detected with a reading and / or recognition of watermarks.
  • the marks are fluorescent, they can be detected and observed on the surface of the document using UV light.
  • the basic plastic substrate is a bi-stretched film composed essentially of high density polyethylene sold under the brand Polyart® by the company ARJOBEX
  • composition modifying the opacity is carried out in an aqueous medium:
  • This opacifying composition is deposited on the plastic film by a laboratory gravure machine so as to print a pattern.
  • the film thus printed is then coated on both sides with a pigmentable composition which can be printed using an air knife coater; the pigment charge used is a mixture of calcium carbonate powder and calcined kaolin.
  • the final product has a plain pattern that is not visible in reflected light and visible in transmitted light.
  • the product produced according to the invention is therefore a flexible support of synthetic, printable material which includes a pseudo watermark allowing it to be authenticated.
  • Example 1 We return to Example 1; to the opacifying composition an optical brightener is added.
  • the optical brightener is sold under the brand BLANKOPHOR P, by BAYER; 0.24 part by commercial weight is added.
  • the final support can be further authenticated in UV light.
  • composition modifying the opacity is produced in a nonaqueous solvent medium, it contains:
  • a final printable support is produced as in Example 1.
  • a support is obtained comprising a pseudo dark watermark.
  • composition modifying the opacity is produced in a nonaqueous solvent medium, it contains:
  • a final printable support is produced as in Example 1.
  • a support is obtained which can be authenticated by a pseudo fluorescent watermark.
  • Example 1 we use Example 1 again, to the opacifying composition a VISCOFIL 4 RL PATE violet dye sold by SANDOZ is added. 0.08 part by commercial weight is added.
  • the opacifying composition of example 1 is used, for which the black dye is replaced by a liquid UNIPERSE GP green dye sold by CIBA GEIGY. 0.32 part by commercial weight is added.
  • a first motif is deposited using an airbrush. On a part of this motif, the opacifying composition is again deposited by airbrush.
  • Example 1 a printable pigmented layer is deposited as in Example 1.

Landscapes

  • Credit Cards Or The Like (AREA)
  • Paper (AREA)
  • Printing Methods (AREA)
  • Laminated Bodies (AREA)

Abstract

A printable flexible synthetic support bearing at least one authenticating or security marking. The support comprises: a synthetic substrate; at least one marking on at least one of the sides of the substrate, said marking consisting of at least one layer of a composition which alters the opacity of the substrate; and at least one layer of a printable pigmentary composition deposited on the marked side, and optionally on the unmarked side, of the substrate. The marking is invisible or barely visible in reflected light, but clearly visible in transmitted light. Applications in synthetic paper security.

Description

La présente invention concerne un support plastique imprimable filigrané contenant des marques de sécurité présentant un effet ressemblant à celui des filigranes. Ces marques sont désignées par la suite sous le vocable pseudo filigranes.The present invention relates to a watermarked printable plastic support containing security marks having an effect resembling that of watermarks. These marks are subsequently designated under the term pseudo watermarks.

Il est courant de filigraner des feuilles de papier. Le filigranage du papier peut se faire de différentes manières selon que l'on réalise des filigranes dits "véritables" ou des filigranes artificiels appelés "pseudo filigranes".It is common to watermark sheets of paper. The watermarking of the paper can be done in different ways depending on whether watermarks called "real" or artificial watermarks called "pseudo watermarks" are produced.

On sait que les papiers fiduciaires et de sécurité comportent des filigranes qui sont obtenus, lors de la fabrication de la feuille de papier par des formes rondes comportant des empreintes en creux et/ou en relief ou à l'aide de rouleaux filigraneurs comportant des dessins en creux et/ou en relief associés à une table plate (machine Fourdrinier). On obtient alors une image qui, lorsqu'on regarde la feuille de papier en transmission, apparaît soit claire, si le rouleau filigraneur comporte un dessin en relief, soit ombrée, si le rouleau filigraneur comporte un dessin en creux. Les zones claires sont dues au fait que l'épaisseur de la feuille et la densité des fibres sont plus faibles que l'épaisseur de la feuille et la densité des fibres dans les zones où il n'y a pas eu empreinte par le rouleau filigraneur. Au contraire, les zones foncées sont dues au fait que l'épaisseur de la feuille et la densité des fibres sont plus importantes.It is known that fiduciary and security papers have watermarks which are obtained, during the manufacture of the sheet of paper, by round shapes comprising intaglio and / or relief imprints or by means of watermark rollers comprising drawings. recessed and / or raised associated with a flat table (Fourdrinier machine). One then obtains an image which, when looking at the sheet of paper in transmission, appears either clear, if the watermark roller has a relief design, or shaded, if the watermark roller has a hollow design. The light areas are due to the fact that the sheet thickness and the density of the fibers are smaller than the sheet thickness and the density of the fibers in the areas where the watermark has not been imprinted . On the contrary, the dark areas are due to the fact that the thickness of the sheet and the density of the fibers are greater.

Il est connu également de réaliser des pseudo filigranes par impression ou dépôt d'une composition, généralement grasse, qui transparentise la feuille de papier de façon permanente. La transparentisation peut être faite également grâce à une matière thermofusible ; dans la demande de brevet EP-203499 cette matière est un polyéthylène.It is also known to produce pseudo watermarks by printing or depositing a composition, generally fatty, which permanently transparentizes the sheet of paper. Transparentization can also be done using a hot-melt material; in patent application EP-203499 this material is a polyethylene.

La réalisation d'un pseudo filigrane dans une feuille de papier peut aussi se faire en opacifiant des zones déterminées, grâce à l'utilisation d'un agent opacifiant.
La demande de brevet FR-2 353 676 décrit un procédé utilisant un agent modifiant l'opacité, à savoir qui augmente l'opacité ou en variante qui diminue l'opacité.The realization of a pseudo watermark in a sheet of paper can also be done by opacifying certain zones, thanks to the use of an opacifying agent.
Patent application FR-2 353 676 describes a process using an opacity modifying agent, namely which increases the opacity or, in a variant, which decreases the opacity.

Cet agent peut être une suspension aqueuse d'un pigment ou d'une charge ou une solution d'un composé chimique, d'un composé coloré ou d'une teinture. Cet agent est appliqué pendant la fabrication de la feuille, sur la nappe fibreuse et avant son enlèvement de la toile, de sorte que ledit agent pénètre dans les interstices de la nappe et provoque une modification de l'opacité de la nappe à traiter dans les zones choisies, après séchage.This agent can be an aqueous suspension of a pigment or a filler or a solution of a chemical compound, a colored compound or a dye. This agent is applied during the manufacture of the sheet, on the fibrous web and before its removal from the fabric, so that said agent penetrates into the interstices of the web and causes a change in the opacity of the web to be treated in the selected areas, after drying.

Cette technique a l'inconvénient de nécessiter des dispositifs spéciaux de rouleaux pour appliquer cet agent et d'employer de préférence un dispositif d'aspiration pour faire pénétrer l'agent dans les interstices de la nappe.This technique has the disadvantage of requiring special roller devices to apply this agent and preferably using a suction device to penetrate the agent into the interstices of the sheet.

Cette technique complexe donne des pseudo filigranes non homogènes, le dépôt se faisant non uniformément.This complex technique gives non-homogeneous pseudo-watermarks, the deposit being made non-uniformly.

Le brevet US-4 520 063 décrit une feuille en résine synthétique contenant des marques de sécurité analogues à un filigrane. On applique deux colorants ayant des vitesses de migration différentes dans la feuille, la migration de celui migrant le plus vite étant arrêtée par la réticulation d'un agent de réticulation contenu dans la feuille ou ajouté au colorant. On observe, en lumière réfléchie un motif qui a la couleur de ce colorant à la surface de la feuille, et en lumière transmise on observe un motif de couleur mixte.US Patent 4,520,063 describes a synthetic resin sheet containing security marks similar to a watermark. Two dyes are applied having different migration rates in the sheet, the migration of the one migrating the fastest being stopped by the crosslinking of a crosslinking agent contained in the sheet or added to the dye. One observes, in reflected light a pattern which has the color of this dye on the surface of the sheet, and in transmitted light a pattern of mixed color is observed.

Ce procédé de réalisation d'un pseudo filigrane dans une feuille plastique est délicat car il nécessite une sélection non évidente de colorants ayant des vitesses de migration différentes dans un matériau donné et il nécessite une opération de réticulation.This method of producing a pseudo watermark in a plastic sheet is delicate because it requires an unobvious selection of dyes having different migration speeds in a given material and it requires a crosslinking operation.

Il est parfois intéressant d'employer une feuille en matière synthétique à la place d'une feuille en papier, constituée essentiellement de fibres de cellulose, par exemple pour fabriquer des documents devant être conservés longtemps ou devant résister à des conditions de manipulations néfastes. De tels documents peuvent être des diplômes, les diplômes devant durer pendant au moins toute la vie de son détenteur. Il peut s'agir aussi d'autres documents notamment de valeur comme par exemple des titres, billets de banque, cartes d'identité, passeports.It is sometimes advantageous to use a sheet of synthetic material in place of a sheet of paper, consisting essentially of cellulose fibers, for example for manufacturing documents which have to be kept for a long time or which have to withstand adverse handling conditions. Such documents may be diplomas, the diplomas having to last for at least the entire life of its holder. he can also other documents, particularly of value, such as titles, banknotes, identity cards, passports.

Il est important que de tels documents portent des marques d'authentification, en particulier des filigranes comme les documents en papier.It is important that such documents bear authentication marks, in particular watermarks such as paper documents.

Les techniques de filigranage décrites précédemment pour le papier sont difficilement applicables aux feuilles en matière synthétique. Elles ne sont pas applicables notamment aux feuilles ayant pour base un film thermoplastique.The watermarking techniques described above for paper are difficult to apply to sheets of synthetic material. They are not applicable in particular to sheets based on a thermoplastic film.

Un but de l'invention est donc de fournir une feuille constituée notamment de matière synthétique qui soit imprimable et qui comporte des marques d'authentification ou de sécurité qui soient peu visibles et même invisibles en lumière réfléchie et parfaitement visibles en lumière transmise.An object of the invention is therefore to provide a sheet made in particular of synthetic material which is printable and which includes authentication or security marks which are not very visible and even invisible in reflected light and perfectly visible in transmitted light.

Un autre but de l'invention est d'empêcher les contrefacteurs ou imitateurs de reproduire de telles marques d'authenticité.Another object of the invention is to prevent counterfeiters or imitators from reproducing such marks of authenticity.

Un troisième but de l'invention est de fournir un procédé de fabrication d'une telle feuille, ce procédé étant rapide et économique.A third object of the invention is to provide a process for manufacturing such a sheet, this process being rapid and economical.

La demanderesse a découvert de manière surprenante qu'une feuille constituée notamment de matière synthétique peut être pseudofiligranée par dépôt ou impression d'une composition modifiant l'opacité à des endroits déterminés sur un substrat en matière synthétique. Cette composition est ensuite recouverte par une couche pigmentée imprimable. Il est remarquable que les marques obtenues soient pas ou peu visibles en lumière réfléchie et visibles en lumière transmise. Ce procédé est avantageusement simple. Un autre avantage notable de ce procédé est de permettre la réalisation de pseudo filigranes de plusieurs tons (dégradés de clair à foncé, par exemple ombrés) ; ce type de filigrane est plus difficile à imiter et présente plus de données d'authentification qu'un filigrane uni.The Applicant has surprisingly discovered that a sheet made in particular of synthetic material can be pseudo-watermarked by deposition or printing of a composition modifying the opacity at determined locations on a substrate of synthetic material. This composition is then covered with a printable pigmented layer. It is remarkable that the marks obtained are not or hardly visible in reflected light and visible in transmitted light. This process is advantageously simple. Another notable advantage of this method is that it allows the creation of pseudo watermarks of several tones (shades from light to dark, for example shaded); this type of watermark is more difficult to imitate and has more authentication data than a solid watermark.

De plus, le fait qu'on dépose finalement une couche pigmentée imprimable rend les marques réalisées difficilement accessibles à un contrefacteur.In addition, the fact that a printable pigmented layer is finally deposited makes the marks produced difficult to access by a counterfeiter.

Dans le cas du papier, les contrefacteurs réalisent de faux filigranes en déposant une composition modifiant l'opacité aux endroits convenablement choisis à la surface d'une feuille de papier. Dans le cas de l'invention, qui concerne une feuille synthétique, cette méthode de contrefaçon n'est pas possible. En effet, si le contrefacteur se fournit dans le commerce en feuille de matière synthétique revêtue d'une couche imprimable, par exemple du POLYART ® fabriqué et vendu par la société ARJOBEX, plusieurs solutions se présentent à lui.In the case of paper, the counterfeiters produce false watermarks by depositing a composition modifying the opacity at the places suitably chosen on the surface of a sheet of paper. In the case of the invention, which relates to a synthetic sheet, this method of counterfeiting is not possible. In fact, if the counterfeiter obtains commercially from a sheet of synthetic material coated with a printable layer, for example POLYART® manufactured and sold by the company ARJOBEX, several solutions arise.

En premier lieu, il peut déposer à la surface d'une telle feuille, une composition modifiant l'opacité à certains endroits, pour tenter de reproduire le filigrane. Mais alors, les marques ainsi réalisées à la surface de la feuille seront nettement visibles en lumière réfléchie.First, it can deposit on the surface of such a sheet, a composition modifying the opacity in certain places, in an attempt to reproduce the watermark. But then, the marks thus produced on the surface of the sheet will be clearly visible in reflected light.

En second lieu, le contrefacteur pourrait dissoudre la couche superficielle imprimable du POLYART ® à l'aide de solvant, puis déposer une composition modifiant l'opacité aux endroits désirés, pour ensuite déposer à nouveau la couche imprimable en surface.Secondly, the counterfeiter could dissolve the printable surface layer of POLYART® using solvent, then deposit a composition modifying the opacity in the desired locations, and then deposit the printable layer again on the surface.

En troisième lieu, le contrefacteur pourrait se fournir en feuille de matière synthétique non revêtue de la couche imprimable puis déposer une composition modifiant l'opacité et déposer ensuite une couche superficielle imprimable.Thirdly, the counterfeiter could obtain a sheet of synthetic material not coated with the printable layer, then deposit a composition modifying the opacity and then deposit a printable surface layer.

Or, toutes ces conditions sont extrêmement difficiles à réunir et la reproduction correcte du pseudo filigrane, notamment s'il a plusieurs tons, n'est pas possible. La méthode utilisée pour sécuriser une feuille plastique selon l'invention est donc particulièrement bien adaptée à un film synthétique imprimable.However, all these conditions are extremely difficult to assemble and the correct reproduction of the pseudo watermark, especially if it has several tones, is not possible. The method used to secure a plastic sheet according to the invention is therefore particularly well suited to a printable synthetic film.

Ainsi l'invention vise à fournir un support synthétique souple imprimable portant au moins une marque d'authentification ou de sécurité, ledit support comprenant :

  • un substrat en matière synthétique,
  • au moins une marque déposée ou imprimée sur au moins l'une des faces du substrat, la marque étant constituée par au moins une composition modifiant l'opacité du substrat,
  • au moins une couche d'une composition pigmentaire imprimable couvrant la marque, ladite couche étant déposée sur la face portant la marque et éventuellement sur la face du substrat ne portant pas de marque ; la marque étant peu à non visible en lumière réfléchie et parfaitement visible en lumière transmise.
Thus, the invention aims to provide a flexible synthetic printable support bearing at least one authentication or security mark, said support comprising:
  • a plastic substrate,
  • at least one trademark or printed mark on at least one of the faces of the substrate, the mark being constituted by at least one composition modifying the opacity of the substrate,
  • at least one layer of a printable pigment composition covering the mark, said layer being deposited on the face bearing the mark and optionally on the face of the substrate not bearing mark; the mark being little to not visible in reflected light and perfectly visible in transmitted light.

La marque est mono ou polychrome.The brand is mono or polychrome.

La composition modifiant l'opacité est une composition pigmentaire et/ou colorée, et/ou fluorescente, elle peut être réalisée en milieu aqueux, en milieu solvant non-aqueux, ou en milieu mixte eau-solvant. Quand cette composition est pigmentaire, elle contient de préférence une charge minérale, par exemple du dioxyde de titane. Elle peut aussi contenir des pigments colorés. La liste des colorants convenant à l'invention n'est pas limitée. La composition modifiant l'opacité comprend au moins une charge minérale et/ou au moins un colorant pigmentaire et/ou soluble et/ou au moins un agent fluorescent, au moins un liant ou vernis, éventuellement au moins un dispersant et éventuellement d'autres additifs.The composition modifying the opacity is a pigmentary and / or colored, and / or fluorescent composition, it can be produced in an aqueous medium, in a non-aqueous solvent medium, or in a mixed water-solvent medium. When this composition is pigmentary, it preferably contains a mineral filler, for example titanium dioxide. It can also contain colored pigments. The list of dyes suitable for the invention is not limited. The composition modifying the opacity comprises at least one mineral filler and / or at least one pigmentary and / or soluble dye and / or at least one fluorescent agent, at least one binder or varnish, optionally at least one dispersant and optionally others additives.

La composition modifiant l'opacité est avantageusement une encre colorée et/ou fluorescente.The composition modifying the opacity is advantageously a colored and / or fluorescent ink.

N'importe quel substrat synthétique de base est utilisable pour réaliser l'invention. On emploie de préférence un film ou une feuille constituée d'au moins une polyoléfine, en particulier du polyéthylène ou du polypropylène. Plus particulièrement, le substrat synthétique de base contient essentiellement du polyéthylène, est formé par extrusion et est biétiré. Ce film peut avantageusement avoir subi un traitement chimique ou de décharge Corona à sa surface afin d'améliorer sa réceptivité aux diverses compositions dont il sera revêtu.Any basic synthetic substrate can be used to carry out the invention. It is preferable to use a film or a sheet made up of at least one polyolefin, in particular polyethylene or polypropylene. More particularly, the basic synthetic substrate contains essentially polyethylene, is formed by extrusion and is bi-stretched. This film may advantageously have undergone a chemical or Corona discharge treatment on its surface in order to improve its receptivity to the various compositions with which it will be coated.

La composition pigmentaire imprimable est de préférence une composition comprenant une charge de préférence minérale, au moins un dispersant, au moins un liant, éventuellement un agent insolubilisant, éventuellement un agent antistatique, éventuellement un agent régulateur de pH et éventuellement d'autres additifs. Ces additifs peuvent par exemple être des agents anti-mousse, des agents régulateurs de la viscosité, des cires.The printable pigment composition is preferably a composition comprising a preferably mineral filler, at least one dispersant, at least one binder, optionally an insolubilizing agent, optionally an antistatic agent, optionally a pH regulating agent and optionally other additives. These additives can, for example, be anti-foaming agents, viscosity regulating agents, waxes.

Une telle composition pigmentaire pourra par exemple être choisie parmi celles décrites dans le brevet britannique GB 2 177 413. D'autres formules permettant d'améliorer l'imprimabilité peuvent convenir. Certaines compositions tuent la fluorescence de la sous-couche. L'homme du métier saura adapter cette composition à la sous-couche choisie.Such a pigment composition may, for example, be chosen from those described in British patent GB 2,177,413. Other formulas making it possible to improve the printability may be suitable. Some compositions kill the fluorescence of the undercoat. A person skilled in the art will know how to adapt this composition to the chosen undercoat.

Le liant de la couche modifiant l'opacité peut par exemple être choisi dans le groupe suivant non limitatif :

  • amidons, éventuellement modifiés
  • protéines de soja
  • dérivés de la cellulose, en particulier une carboxyméthylcellulose
  • alginate
  • latex, notamment synthétiques, contenant :
    • . des copolymères styrène-butadiène, éventuellement carboxylés
    • . des copolymères d'acrylates
  • alcool polyvinylique
  • résines vinyliques
  • résines epoxy
  • résines mélamine-phénolique et leurs mélanges
The binder of the opacity-modifying layer can for example be chosen from the following non-limiting group:
  • starches, possibly modified
  • soy protein
  • cellulose derivatives, in particular a carboxymethylcellulose
  • alginate
  • latex, especially synthetic, containing:
    • . styrene-butadiene copolymers, optionally carboxylated
    • . acrylate copolymers
  • polyvinyl alcohol
  • vinyl resins
  • epoxy resins
  • melamine-phenolic resins and mixtures thereof

Les charges pigmentaires pour réaliser la couche modifiant l'opacité peuvent par exemple être choisies dans le groupe suivant, donné à titre indicatif :

  • oxydes de titane
  • carbonates de calcium
  • argiles
  • hydroxydes d'aluminium
  • sulfoaluminates de calcium (blanc de satin)
  • sulfates de baryum (blanc fixe)
  • talcs
  • kaolins
  • silices
  • autres silicates que les talcs, kaolins
The pigment fillers for producing the opacity-modifying layer can for example be chosen from the following group, given for information:
  • titanium oxides
  • calcium carbonates
  • clays
  • aluminum hydroxides
  • calcium sulfoaluminates (satin white)
  • barium sulfates (fixed white)
  • talcs
  • kaolins
  • silicas
  • other silicates than talcs, kaolins

Ces charges sont sous forme de fines poudres (granulométrie moyenne inférieure à 10 micromètres en général). On peut envisager également l'utilisation de pigments plastiques (poudres de copolymères acrylonitrile-vinylidène, de polystyrène par exemple).These fillers are in the form of fine powders (average particle size less than 10 micrometers in general). One can also consider the use of plastic pigments (powders of acrylonitrile-vinylidene copolymers, of polystyrene for example).

Les pigments colorés (ou colorants pigmentaires) peuvent par exemple être choisis dans le groupe suivant non limitatif :

  • oxydes de fer (rouge, noir par exemple)
  • oxydes de chrome
  • phtalocyanines (bleues, vertes)
  • anthraquinones (violettes par exemple)
  • quinacridones
  • noir de carbone
  • chromates de plomb, de calcium, de baryum, de strontium
  • chromomolybdates de plomb
  • sulfoséléniures de plomb
  • composés monoazoïques, dérivés naphtamide, dérivés naphta-ortho-toluidinique, dérivés acétoacétyle
  • composés disazoïques, dérivés benzidinique.
The colored pigments (or pigmentary dyes) can for example be chosen from the following non-limiting group:
  • iron oxides (red, black for example)
  • chromium oxides
  • phthalocyanines (blue, green)
  • anthraquinones (violets for example)
  • quinacridones
  • carbon black
  • lead, calcium, barium, strontium chromates
  • lead chromomolybdates
  • lead sulfoselenides
  • monoazo compounds, naphthamide derivatives, naphtha-ortho-toluidine derivatives, acetoacetyl derivatives
  • disazo compounds, benzidine derivatives.

Comme autres colorants, on peut utiliser les colorants solubles en milieu aqueux qui sont habituellement classés en trois catégories :

  • les colorants basiques ; ce sont généralement des sels chlorhydriques de bases colorantes (par exemple la fuschine, le vert malachite) ; ces colorants ont souvent les configurations triphénilméthane ou de type azoïque.
  • les colorants acides ; ce sont généralement des sels alcalins, en particulier de sodium ou de potassium, de combinaisons de composés diazoiques et de l'acide sulfonique.
  • les colorants directs, dits aussi substantifs, ils sont apparentés aux colorants acides ; ce sont surtout des sels de sodium de combinaisons azoïques avec des groupes sulfoniques ou carboxyliques.
As other dyes, it is possible to use dyes soluble in an aqueous medium which are usually classified in three categories:
  • basic dyes; these are generally hydrochloric salts of coloring bases (for example fuschine, malachite green); these dyes often have the triphenilmethane or azo type configurations.
  • acid dyes; these are generally alkaline salts, in particular sodium or potassium, of combinations of diazo compounds and sulfonic acid.
  • direct dyes, also called substantives, they are related to acid dyes; they are mainly sodium salts of azo combinations with sulfonic or carboxylic groups.

On peut combiner ces divers colorants et/ou pigments. Il faut éventuellement tenir compte du pH de la couche imprimable à déposer finalement, pour choisir ces colorants ou pigments qui pourraient être instables dans certaines conditions.These various dyes and / or pigments can be combined. It may be necessary to take into account the pH of the printable layer to be deposited finally, to choose these dyes or pigments which could be unstable under certain conditions.

A priori, n'importe quel agent fluorescent peut convenir, cependant il est nécessaire de tester cet agent car certains agents présentent une fluorescence dans un environnement donné et pas de fluorescence dans d'autres conditions. Il peut être important aussi que ces agents présentent une bonne tenue à la lumière visible ou invisible, cela dépend de l'utilisation du produit fini. Des agents présentant plus particulièrement une phosphorescence ne sont pas pas exclus.A priori, any fluorescent agent may be suitable, however it is necessary to test this agent because certain agents exhibit fluorescence in a given environment and no fluorescence under other conditions. It may also be important that these agents exhibit good resistance to visible or invisible light, this depends on the use of the finished product. Agents which more particularly exhibit phosphorescence are not excluded.

Les agents fluorescents peuvent par exemple être choisis dans le groupe suivant, donné à titre indicatif mais non limitatif :

  • les agents d'azurage optique habituellement employés dans le papier pour augmenter sa blancheur ; il peut s'agir de dérivés de l'acide diamino-stilbène-disulfonique en particulier des dérivés du 4,4'diaminostilbène-2,2' de l'acide sulfonique, de dérivés d'hétérocycles azotés
  • des chlélates de terres rares (par un exemple un oxysulfure d'yttrium dopé à l'Europium) ou d'autres produits dopés (fluorures de métaux alcalins dopés, ferrites dopées), des sulfures de zinc, des sulfures de zinc et de cadmium (activés par du cuivre)
  • des dérivés de la coumarine
  • des dérives du B-naphtol disulfoné
  • des dérivés monoazoiques
  • des dérivés disazoiques
  • la fluorescéine, l'éosine

   et leurs mélanges éventuellement.The fluorescent agents can, for example, be chosen from the following group, given as an indication but not limiting:
  • the optical brighteners usually used in paper to increase its whiteness; they may be derivatives of diamino-stilbene-disulfonic acid, in particular derivatives of 4,4'diaminostilbene-2,2 'of sulfonic acid, derivatives of nitrogen heterocycles
  • rare earth chlelates (for example an europium doped yttrium oxysulfide) or other doped products (doped alkali metal fluorides, doped ferrites), zinc sulfides, zinc and cadmium sulfides ( activated by copper)
  • coumarin derivatives
  • derivatives of disulfonated B-naphthol
  • monoazo derivatives
  • disazo derivatives
  • fluorescein, eosin

and their mixtures if necessary.

On peut utiliser aussi des pigments magnétiques, métalliques, des produits luminescents aux infra-rouges.We can also use magnetic and metallic pigments, luminescent and infrared products.

Des pigments à base de sulfure de zinc éméttant dans diverses longueurs ont été décrits dans les demandes de brevets EP-A-34059, EP-A-78538 et EP-A-91184 déposées par KASEI OPTONIX.Pigments based on zinc sulfide emitting in various lengths have been described in patent applications EP-A-34059, EP-A-78538 and EP-A-91184 filed by KASEI OPTONIX.

Un procédé préféré de réalisation d'une feuille selon l'invention consiste à imprimer au moins une fois de préférence, par héliogravure, au moins l'une des faces du substrat plastique de base au moyen d'au moins une composition modificatrice d'opacité, puis à coucher sur cette ou ces faces, et éventuellement sur l'autre face, la couche pigmentée imprimable avec l'un des moyens de couchage utilisés dans le domaine de l'impression ou de l'industrie papetière.A preferred method of producing a sheet according to the invention consists in printing at least once preferably, by photogravure, at least one of the faces of the basic plastic substrate by means of at least one opacity modifying composition. , then to lay on this or these faces, and possibly on the other face, the pigmented layer printable with one of the coating means used in the field of printing or the paper industry.

D'autres procédés pour déposer la composition modifiant l'opacité pris notamment dans les techniques de l'impression ou des arts graphiques peuvent convenir, mais l'héliogravure est le procédé qui fournit le dépôt le plus régulier et uniforme.Other methods for depositing the composition modifying the opacity taken in particular in the techniques of printing or the graphic arts may be suitable, but gravure printing is the method which provides the most regular and uniform deposit.

Pour réaliser un filigrane présentant plusieurs tons on dépose en une ou plusieurs fois la composition modifiant l'opacité à des endroits choisis par dessus le premier dépôt. On peut utiliser la même composition ou une autre composition.To make a watermark presenting several tones, the composition modifying the opacity is deposited in one or more installments at places chosen above the first deposit. The same composition or another composition can be used.

D'autres éléments de sécurité peuvent être incorporés au film de base et/ou dans la couche imprimable et/ou dans la composition modifiant l'opacité.Other security elements can be incorporated in the base film and / or in the printable layer and / or in the composition modifying the opacity.

Les marques obtenues selon l'invention forment un pseudo filigrane qui peut également être détecté avec un appareil de lecture et/ou de reconnaissance de filigranes. Lorsque les marques sont fluorescentes, on peut les détecter et les observer en surface du document en utilisant une lumière UV.The marks obtained according to the invention form a pseudo watermark which can also be detected with a reading and / or recognition of watermarks. When the marks are fluorescent, they can be detected and observed on the surface of the document using UV light.

L'invention sera mieux comprise à l'aide des exemples suivants, nullement limitatifs mais donnés à titre d'illustration.The invention will be better understood using the following examples, which are in no way limiting but are given by way of illustration.

EXEMPLESEXAMPLES

Dans les exemples suivants, le substrat en matière synthétique de base est un film biétiré composé essentiellement de polyéthylène haute densité commercialisé sous la marque Polyart ® par la société ARJOBEXIn the following examples, the basic plastic substrate is a bi-stretched film composed essentially of high density polyethylene sold under the brand Polyart® by the company ARJOBEX

Exemple 1Example 1

La composition suivante modifiant l'opacité est réalisée en milieu aqueux :

Figure imgb0001
The following composition modifying the opacity is carried out in an aqueous medium:
Figure imgb0001

On dépose cette composition opacifiante sur le film plastique par une machine d'héliogravure de laboratoire de façon à imprimer un motif.This opacifying composition is deposited on the plastic film by a laboratory gravure machine so as to print a pattern.

On couche ensuite le film ainsi imprimé sur les deux faces avec une composition pigmentaire imprimable à l'aide d'une coucheuse à lame d'air ; la charge pigmentaire utilisée est un mélange de poudre de carbonate de calcium et de kaolin calciné.The film thus printed is then coated on both sides with a pigmentable composition which can be printed using an air knife coater; the pigment charge used is a mixture of calcium carbonate powder and calcined kaolin.

Le produit final présente un motif uni non visible en lumière réfléchie et visible en lumière transmise.The final product has a plain pattern that is not visible in reflected light and visible in transmitted light.

Le produit réalisé selon l'invention est donc un support souple en matière synthétique, imprimable qui comporte un pseudo filigrane permettant de l'authentifier.The product produced according to the invention is therefore a flexible support of synthetic, printable material which includes a pseudo watermark allowing it to be authenticated.

Exemple 2Example 2

On reprend l'exemple 1 ; à la composition opacifiante on ajoute un azurant optique. L'azurant optique est commercialisé sous la marque BLANKOPHOR P, par BAYER ; on en ajoute 0,24 partie en poids commercial.We return to Example 1; to the opacifying composition an optical brightener is added. The optical brightener is sold under the brand BLANKOPHOR P, by BAYER; 0.24 part by commercial weight is added.

On obtient dans ce cas un pseudo filigrane fluorescent.In this case, a pseudo fluorescent watermark is obtained.

Le support final peut être authentifié de plus en lumière UV.The final support can be further authenticated in UV light.

Exemple 3Example 3

La composition modifiant l'opacité est réalisée en milieu solvant non aqueux, elle contient :

Figure imgb0002
The composition modifying the opacity is produced in a nonaqueous solvent medium, it contains:
Figure imgb0002

On réalise un support imprimable final comme dans l'exemple 1. On obtient un support comportant un pseudo filigrane sombre.A final printable support is produced as in Example 1. A support is obtained comprising a pseudo dark watermark.

Exemple 4Example 4

La composition modifiant l'opacité est réalisée en milieu solvant non aqueux, elle contient :

Figure imgb0003
The composition modifying the opacity is produced in a nonaqueous solvent medium, it contains:
Figure imgb0003

On réalise un support imprimable final comme dans l'exemple 1. On obtient un support authentifiable par un pseudo filigrane fluorescent.A final printable support is produced as in Example 1. A support is obtained which can be authenticated by a pseudo fluorescent watermark.

Exemple 5Example 5

On reprend l'exemple 1, à la composition opacifiante on ajoute un colorant violet VISCOFIL 4 RL PATE commercialisé par SANDOZ. On en ajoute 0,08 partie en poids commercial.We use Example 1 again, to the opacifying composition a VISCOFIL 4 RL PATE violet dye sold by SANDOZ is added. 0.08 part by commercial weight is added.

On obtient alors un pseudo filigrane coloré.We then obtain a pseudo colored watermark.

Exemple 6Example 6

On reprend la composition opacifiante de l'exemple 1 pour laquelle on remplace le colorant noir par un colorant vert UNIPERSE GP liquide commercialisé par CIBA GEIGY. On en ajoute 0,32 partie en poids commercial.The opacifying composition of example 1 is used, for which the black dye is replaced by a liquid UNIPERSE GP green dye sold by CIBA GEIGY. 0.32 part by commercial weight is added.

On dépose à l'aide d'un aérographe un premier motif. Sur une partie de ce motif, on dépose à nouveau par aérographe de la composition opacifiante.A first motif is deposited using an airbrush. On a part of this motif, the opacifying composition is again deposited by airbrush.

Finalement on dépose une couche pigmentée imprimable comme dans l'exemple 1.Finally, a printable pigmented layer is deposited as in Example 1.

On obtient alors un support avec un pseudo filigrane coloré comportant une partie claire et une partie plus foncée ; ce filigrane est donc à deux tons.We then obtain a support with a pseudo colored watermark comprising a light part and a darker part; this watermark is therefore in two tones.

Claims (13)

  1. Imprintable, flexible synthetic support bearing at least one authentication or security mark, said support comprising:
    - a substrate of synthetic material,
    - at least one mark deposited or imprinted on at least one of the faces of the substrate, said mark being constituted by at least one composition altering the substrate opacity,
    - at least one layer of an imprintable pigment composition covering the mark, said layer being deposited on the face carrying the mark and optionally on the face of the substrate without the mark; the mark being barely visible in reflected light and perfectly visible in transmitted light.
  2. Support according to claim 1, characterized by the fact that the mark is monochromatic or polychromatic.
  3. Support according to one of claims 1 or 2, characterized by the fact that the opacity-altering composition contains at least one mineral filler and at least one binder.
  4. Support according to one of claims 1 to 3, characterized by the fact that the opacity-altering composition contains at least one soluble dye and/or a pigment colorant.
  5. Support according to one of claims 1 to 4, characterized by the fact that the opacity-altering composition contains a fluorescing agent.
  6. Support according to one of claims 1 to 5, characterized by the fact that the opacity-altering composition is a dyed and/or fluorescent ink.
  7. Support according to one of claims 1 to 6, characterized by the fact that the substrate in synthetic material is a film or a sheet constituted of at least one polyolefin.
  8. Support according to claim 7, characterized by the fact that the polyolefin is selected from among polyethylene or polypropylene.
  9. Support according to one of claims 7 or 8, characterized by the fact that the substrate is essentially constituted of high-density polyethylene, is formed by extrusion, is biaxially stretched and is optionally surface-treated with corona discharges.
  10. Support according to one of claims 1 to 9, characterized by the fact that the imprintable pigment composition is preferably a composition comprising a mineral filler, at least one dispersant, at least one binder, optionally an insolubilizer, optionally an anti-static agent, optionally a pH regulating agent, and optionally other additives.
  11. Method for manufacturing a support according to one of claims 1 to 10, characterized by the fact that at least one opacity-altering composition is deposited in specific areas on at least one of the faces of a substrate in synthetic material to form at least one authentication or security mark and in that an imprintable, pigmented layer is deposited on the face with the mark and optionally also on the other face, said layer covering the mark.
  12. Method according to claim 11, characterized by the fact that the opacity altering composition is deposited by photo-etching.
  13. Method according to one of claims 11 or 12, characterized by the fact that the imprintable pigmented layer has a dry specific weight comprised between 5 and 30 g/m² and preferably about 10 g/m².
EP90917296A 1989-11-14 1990-11-13 Watermarked plastic support Revoked EP0500726B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90917296T ATE89514T1 (en) 1989-11-14 1990-11-13 PLASTIC CARRIER WITH WATERMARK.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8914925A FR2654386B1 (en) 1989-11-14 1989-11-14 FILIGRANE PLASTIC SUPPORT.
FR8914925 1989-11-14

Publications (2)

Publication Number Publication Date
EP0500726A1 EP0500726A1 (en) 1992-09-02
EP0500726B1 true EP0500726B1 (en) 1993-05-19

Family

ID=9387387

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90917296A Revoked EP0500726B1 (en) 1989-11-14 1990-11-13 Watermarked plastic support

Country Status (6)

Country Link
US (1) US5275870A (en)
EP (1) EP0500726B1 (en)
DE (1) DE69001677T2 (en)
ES (1) ES2042314T3 (en)
FR (1) FR2654386B1 (en)
WO (1) WO1991007285A1 (en)

Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5536468A (en) * 1993-11-26 1996-07-16 Arjobex Limited Method of making watermarks on synthetic paper
US5935696A (en) * 1997-06-11 1999-08-10 Mobil Oil Corporation Multilayer film structures for use in the production of banknotes or the like
ZA955144B (en) * 1994-06-27 1996-12-23 Mobil Oil Corp Cross-laminated multilayer film structures for use in the production of banknotes or the like
US5698333A (en) * 1994-06-27 1997-12-16 Mobil Oil Corporation Multilayer film structures for use in the production of banknotes or the like
US5879028A (en) * 1998-04-23 1999-03-09 Mobil Oil Corporation Weakened oriented high density polyethylene film for multilayer security document lamination
US6294267B1 (en) 1994-06-27 2001-09-25 Exxonmobil Oil Corporation Core printed security documents
US5716695A (en) * 1996-02-15 1998-02-10 Mobil Oil Corp Cross-laminated multilayer film structures for use in the production of banknotes or the like
US6249588B1 (en) * 1995-08-28 2001-06-19 ECOLE POLYTECHNIQUE FéDéRALE DE LAUSANNE Method and apparatus for authentication of documents by using the intensity profile of moire patterns
US5995638A (en) * 1995-08-28 1999-11-30 Ecole Polytechnique Federale De Lausanne Methods and apparatus for authentication of documents by using the intensity profile of moire patterns
US6819775B2 (en) 1996-07-05 2004-11-16 ECOLE POLYTECHNIQUE FéDéRALE DE LAUSANNE Authentication of documents and valuable articles by using moire intensity profiles
DE19709606C1 (en) * 1997-03-08 1998-10-15 Beiersdorf Ag Patches with long afterglow printing and process for its manufacture
BR9907149A (en) * 1998-01-21 2000-10-24 Securency Pty Ltd Method for verifying the authenticity of a security document and document for use in such a method
GB9906452D0 (en) * 1999-03-19 1999-05-12 Rue De Int Ltd Security sheet and method
US6358596B1 (en) 1999-04-27 2002-03-19 The Standard Register Company Multi-functional transparent secure marks
DE69917947T2 (en) 1999-11-29 2005-07-21 Ecole polytechnique fédérale de Lausanne (EPFL) NEW METHOD AND DEVICE FOR AUTHENTICATING DOCUMENTS BY APPLYING THE INTENSITY PROFILE OF MOIREMUSTER
FR2804448B1 (en) * 2000-02-01 2002-04-05 Arjo Wiggins Sa SECURITY PAPER COMPRISING A SECURITY ZONE, METHOD FOR PRODUCING SUCH PAPER AND DEVICE FOR CARRYING OUT SAID METHOD
FR2804447B1 (en) * 2000-02-01 2002-04-05 Arjo Wiggins Sa PAPER COMPRISING A MULTI-TONING FILIGRANE AND CANVAS FOR MANUFACTURING THIS PAPER
DE10021896C2 (en) * 2000-05-05 2002-04-25 Mitsubishi Hitec Paper Flensbu Translucent sheet-like recording material and process for its production
ES2182718B1 (en) * 2001-07-30 2004-09-16 Giro Gh, S.A. PROCEDURE FOR PRINTING A FLEXIBLE SUPPORT.
US6607813B2 (en) 2001-08-23 2003-08-19 The Standard Register Company Simulated security thread by cellulose transparentization
DE50107391D1 (en) 2001-10-16 2005-10-13 Mitsubishi Hitec Paper Flensbu RAILED RECORDING MATERIAL IN TRANSLUCENT VERSION AND METHOD FOR THE PRODUCTION THEREOF
ITBZ20020016A1 (en) * 2002-03-29 2003-09-29 Ara Paolo Dall METHOD FOR THE REALIZATION OF A VERIFIABLE REGISTRATION SUPPORT ON AUTHENTICITY AND REGISTRATION SUPPORT SO OBTAINED.
US7058202B2 (en) * 2002-06-28 2006-06-06 Ecole polytechnique fédérale de Lausanne (EPFL) Authentication with built-in encryption by using moire intensity profiles between random layers
US7097899B2 (en) * 2002-09-13 2006-08-29 Agfa-Gevaert Carrier of information bearing a watermark
EP1398175B1 (en) * 2002-09-13 2011-05-18 Agfa-Gevaert Carrier of information bearing a watermark
FR2871174B1 (en) * 2004-06-08 2011-07-15 Arjowiggins Security SECURITY AND / OR VALUE DOCUMENT
US8412671B2 (en) * 2004-08-13 2013-04-02 Hewlett-Packard Development Company, L.P. System and method for developing a star schema
DE102004041828A1 (en) 2004-08-27 2006-03-23 Bundesdruckerei Gmbh Security feature for a value and security document and corresponding document
DE502005004468D1 (en) * 2005-06-22 2008-07-31 Mitsubishi Hitec Paper Flensbu SAFETY FEATURES FOR RECORDING MATERIALS
FR2941713B1 (en) 2009-02-03 2011-04-01 Arjowiggins Security METHOD FOR SECURING A COLORED OPAQUE OBJECT
US8351087B2 (en) * 2009-06-15 2013-01-08 Ecole Polytechnique Federale De Lausanne (Epfl) Authentication with built-in encryption by using moire parallax effects between fixed correlated s-random layers
EP2329955B1 (en) * 2009-12-01 2012-07-25 Mitsubishi HiTec Paper Europe GmbH Heat-sensitive recording material with authenticity characteristic
EP2580068B1 (en) 2010-06-10 2015-07-29 Arjowiggins Security Secure structure
US20120224230A1 (en) * 2011-03-03 2012-09-06 Xerox Corporation Watermarking comprising ultraviolet curable solid inks and methods for producing the same
FR2984799A1 (en) 2011-12-22 2013-06-28 Arjowiggins Security MULTILAYER STRUCTURE COMPRISING AT LEAST ONE DIFFUSING LAYER
EP2636532B1 (en) * 2012-03-10 2014-09-24 Mitsubishi HiTec Paper Europe GmbH Method for producing a recording material with authentication characteristic
FR3004471B1 (en) 2013-04-11 2015-10-23 Arjowiggins Security SECURITY ELEMENT COMPRISING A MASKING STRUCTURE CONTAINING A MIXTURE OF NANOMETER CHARGES.
FR3004470B1 (en) 2013-04-11 2015-05-22 Arjowiggins Security SECURITY ELEMENT COMPRISING AN INTERFERENTIAL PIGMENT AND A NANOMETRIC LOAD.
SG11201700017SA (en) * 2014-07-08 2017-01-27 Xyleco Inc Marking plastic-based products
JP6545116B2 (en) * 2015-03-31 2019-07-17 特種東海製紙株式会社 Anti-counterfeit paper and manufacturing method thereof
WO2016197197A1 (en) * 2015-06-10 2016-12-15 Innovia Security Pty Ltd Optical device having a hidden depiction
GB2542783B (en) 2015-09-29 2018-02-07 De La Rue Int Ltd Security print media and method of manufacture thereof
BR112019017363B1 (en) 2017-02-27 2023-02-23 Crane & Co., Inc PAPER WHICH INCLUDES ONE OR MORE MULTITUDE WATERMARKS THAT HAVE FULL TONE, AND AN IMPROVED WATERMARK TOOL FOR MANUFACTURING SUCH PAPER
CN107418023A (en) * 2017-05-25 2017-12-01 山西宇皓环保纸业有限公司 A kind of preparation method of false proof stone paper

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2331575A (en) * 1940-08-03 1943-10-12 George La Monte & Son Safety paper and method of making same
US3736133A (en) * 1971-06-21 1973-05-29 Xerox Corp Transparent ink absorbent lacquers
DE2724681A1 (en) * 1976-06-03 1977-12-22 Wiggins Teape Ltd METHOD AND APPARATUS FOR MAKING MARKINGS IN PAPER Web
DE3129400C2 (en) * 1981-07-25 1985-06-27 Dynamit Nobel Ag, 5210 Troisdorf Use of a flat structure made of plastic
US4520083A (en) * 1983-03-02 1985-05-28 Standard Oil Company (Indiana) Non-aqueous electrochemical cell and electrolyte
GB8413922D0 (en) * 1984-05-31 1984-07-04 Continu Forms Holdings Plc Paper with watermark effect
EP0325346B1 (en) * 1988-01-18 1996-04-10 The Wiggins Teape Group Limited Watermarked paper sheet for use in xerographic imaging processes

Also Published As

Publication number Publication date
WO1991007285A1 (en) 1991-05-30
US5275870A (en) 1994-01-04
FR2654386B1 (en) 1992-01-17
ES2042314T3 (en) 1993-12-01
DE69001677T2 (en) 1993-10-28
EP0500726A1 (en) 1992-09-02
FR2654386A1 (en) 1991-05-17
DE69001677D1 (en) 1993-06-24

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