WO2018073320A1 - Security substrate - Google Patents

Security substrate Download PDF

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Publication number
WO2018073320A1
WO2018073320A1 PCT/EP2017/076637 EP2017076637W WO2018073320A1 WO 2018073320 A1 WO2018073320 A1 WO 2018073320A1 EP 2017076637 W EP2017076637 W EP 2017076637W WO 2018073320 A1 WO2018073320 A1 WO 2018073320A1
Authority
WO
WIPO (PCT)
Prior art keywords
substrate according
metal oxide
substrate
doped
metal
Prior art date
Application number
PCT/EP2017/076637
Other languages
French (fr)
Inventor
Pierre Sarrazin
Original Assignee
Oberthur Fiduciaire Sas
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 Oberthur Fiduciaire Sas filed Critical Oberthur Fiduciaire Sas
Priority to EP17791021.3A priority Critical patent/EP3529416B1/en
Publication of WO2018073320A1 publication Critical patent/WO2018073320A1/en

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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
    • D21H21/42—Ribbons or strips
    • 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
    • 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
    • B42D25/355—Security threads
    • 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
    • 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
    • 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
    • D21H21/48—Elements suited for physical verification, e.g. by irradiation

Definitions

  • the present invention relates to safety substrates and methods of making them.
  • a security substrate is a substrate used in the manufacture of secure documents, protected against counterfeiting by means making it difficult for them to be reproduced or falsified by counterfeiters.
  • the invention applies to papermaking substrates, for example for the production of banknotes, as well as to plastic substrates, used especially in the manufacture of banknotes, security elements such as security threads, movies or fo they.
  • the invention is more particularly concerned with conferring on the substrate a specific signature in the infrared (IR), this signature making it possible to authenticate or even identify the substrate by comparison with a reference signature.
  • IR infrared
  • JP 2010084079 also discloses an IR-absorbing ink based on tin oxide doped with antimony and / or indium oxide doped with tin.
  • tin oxide doped with antimony and / or indium oxide doped with tin The use of these substantially colorless materials allows better compatibility with the colored pigments used elsewhere to give the ink the desired color.
  • detection can be done by reflection.
  • Application KR10-1131145 discloses a security paper comprising an absorbent substance in the IR. This application aims to overcome the color problems encountered when using certain known substances, absorbing in the IR, and offers white or opaline materials based on alkali metals, alkaline earth or transition.
  • WO 2012/103578 discloses a security material comprising a transparent polymeric carrier medium having nanoparticles absorbing in IR dispersed in the medium.
  • WO 2007/132214 discloses a composition comprising an ink and an absorbent material in the IR.
  • WO 00/32700 discloses a filler or a papermaking coating derived from hydrated clay having a metal oxide and / or a precursor of a metal oxide of a lean metal aggregated with the clay.
  • the aim of the invention is to further improve the securing of the substrates, in particular to confer a signature, preferably a unitary signature, in the machine-detectable IR in transmission, while preserving the optical properties of whiteness and opacity of the substrate when the latter is papermaker, and intended for example for the manufacture of banknotes.
  • unitary signature it is necessary to understand a signature associated bijectively with a given substrate; for example the substrate used for the manufacture of all the notes corresponding to the same cut has the same signature. In another example, all the notes issued by the same central bank have the same signature, regardless of the value of the cuts.
  • a security substrate comprising, dispersed in its mass, a particulate absorbing system in the IR comprising:
  • said particulate system conferring on said substrate a specific transmission response in the IR, preferably with at least one absorption peak in the IR, in particular between 700 and 1000 nm, better with several absorption peaks in the IR, in particular between 700 and 1000 nm.
  • the lean metal may be in the form of ionic (salt), molecular (oxide, especially SnO 2 ) doped or non-doped, or atomic (doping, in particular Al or Ga).
  • “Lean metal” denotes a metal selected from the group consisting of aluminum, bismuth, tin, gallium, indium, lead, polonium and thallium, the latter two metals being, however, preferred.
  • Said oxide or metal oxide salt is preferably an oxide or an oxide salt of a transition metal or a metalloid, respectively.
  • the filler comprises as metal oxide S1O2 or ⁇ 2 and as poor metal Sn.
  • the particle size of the charge is preferably between 0.2 and 5 ⁇ , being preferably less than 1 ⁇ and / or greater than 0.5 ⁇ .
  • the shape of the particles of the filler may be spherical, platelet or acicular.
  • the particles of the filler have an en2 or S102 core coated with antimony-doped tin oxide.
  • the invention makes it possible, according to the particulate system used, to have a spectral signature in the unitary IR, readable in transmission over the entire substrate, due to the mass incorporation during its manufacture.
  • IR is meant infra-red in the spectral band 700 nm - 1500 nm.
  • the invention also offers the advantage, by the detection in transmission, to avoid scrambling the responses of other security elements detected in reflection.
  • the detection can be carried out according to the invention in non-printed areas, which offers a complementary security with respect to an absorbing ink in the IR and detected in reflection.
  • the invention also makes it possible, if desired, to overcome the use of certain conventional paper-based fillers such as titanium dioxide, kaolin or calcium carbonate, or to reduce their content, while achieving the optical properties of whiteness and opacity usually sought in the manufacture of a paper for bank note including.
  • the substrate may thus comprise less than 4% by dry weight of ⁇ 2 in the form of particles of T1O2, with respect to the total dry weight of the substrate, more preferably completely free of ⁇ 2 in the form of particles of TiO 2.
  • the substrate may comprise less than 4% by dry weight of kaolin or calcium carbonate relative to the total dry weight of the substrate.
  • Another advantage of the present invention is to provide electroconductivity to the substrate, which can give it a specific electrical signature and contribute to dissipate the electrostatic charges in the presence of large areas of plastic material, in particular during use in conjunction with a paperboard substrate of at least one plastic element such as a wide security thread, a lamination tape, a foil or a film, especially in the case of hybrid paper / plastic ticket.
  • charge is meant a compound introduced in the particulate state into the rest of the substrate, and which remains in the particulate state.
  • the particulate system may comprise or consist of a mixture of at least one filler composed of at least one metal oxide or metal oxide salt, in particular a mica, and at least one lean metal in ionic, molecular form , or atomic.
  • the particulate system may further comprise or consist of a filler consisting of at least one metal oxide or metal oxide salt, especially a mica, and at least one lean metal in ionic, molecular, or atomic form.
  • This is in particular a core-shell type charge comprising a core consisting of said metal oxide or metal oxide salt and a bark consisting of said lean metal in ionic form, molecular or atomic, preferably in molecular form.
  • metal oxide or metal oxide salt being doped with said poor metal in atomic form.
  • the metal oxide is preferably selected from Ti0 2, ZnO, Zr0 2, Ce0 2, Si0 2, A1 2 0 3, mica, talc and mixtures thereof.
  • the metal oxide may especially have a refractive index greater than 1.8 (Ti0 2 , ZnO, ...) or less than 1.8 (Si0 2 , Al 2 O 3 , 7) allowing, for example, have a colorless charge that does not modify the optical properties of a paperboard substrate.
  • the doped lean metal oxide is preferably doped with metalloids or poor metals, especially with antimony, aluminum or germanium. Depending on the poor metals and metalloids selected, the infra-red absorption can be modified and thus obtain a different spectral response, to make it specific to each substrate if desired.
  • the lean metal can be in the form of tin oxide.
  • the metal oxide of poor metal, in particular doped metal, on the one hand, and the metal oxide or the metal oxide salt, in particular a mica, on the other hand, can respectively constitute the bark and the core of a pigment with core bark structure.
  • the heart can be hollow.
  • the particulate system may consist of particles of maximum size less than or equal to 100 ⁇ , preferably less than 60 ⁇ .
  • the particulate system can consist of particles of average size D50 less than or equal to 10 ⁇ , preferably 5 ⁇ .
  • the particulate system can consist of particles of average size D50 less than or equal to 1 ⁇ , preferably 0.5 ⁇ .
  • the particulate system may consist of particles with a maximum size of less than or equal to 5 ⁇ m, preferably less than 1 ⁇ m.
  • the particulate system may consist of particles of minimum size greater than or equal to 0.2 ⁇ , preferably 0.5 ⁇ .
  • the particulate system may comprise and / or consist of spherical particles.
  • the particulate system may comprise and / or consist of acicular and / or platelet particles, which has the advantage of increasing the specific surface area.
  • the particulate system may comprise a single doped metal oxide or alternatively several doped metal oxides.
  • the particulate system may be substantially white and opaque to visible light, or alternatively may be transparent.
  • the substrate preferably comprises between 0.1 and 20% by weight, relative to the total mass of the dry-finished substrate, of said particulate system, better still between 0.2 and 5, better still between 0.5 and 2.5%. .
  • the amount of said particulate system is adjusted so as not to unduly darken the substrate giving it a greyish appearance.
  • the substrate can be paper.
  • the substrate may especially be suitable for the manufacture of banknotes.
  • the substrate can be highlighted.
  • the substrate may still be non-fibrous.
  • the substrate, when paper maker, may comprise natural and / or synthetic fibers. In the case in particular of a substrate for banknotes, it may comprise flax fibers and / or cotton fibers, in particular cotton linters.
  • the substrate may be of plastic, that is to say polymeric, in particular polyethylene terephthalate (PET), polycarbonate (PC), polypropylene (PP) or polyethylene (PE).
  • PET polyethylene terephthalate
  • PC polycarbonate
  • PP polypropylene
  • PE polyethylene
  • the plastic material can be extruded or coextruded with the particulate system.
  • the invention also relates to a security document comprising a substrate according to the invention, in particular a banknote.
  • the invention also relates to a wire, a film, a lamination tape or a foil security comprising a substrate according to the invention.
  • Samples made Paper samples are made using a paper machine from a fibrous 100% cotton linters composition.
  • the particulate system for the samples according to the invention is introduced into the fibrous dispersion 100% cotton linters before papermaking.
  • IR absorption measurements (percentage absorption rate) are carried out between 400 nm and 1000 nm. Absorption spectra are then normalized (as abscissa) at a wavelength of 500 nm to analyze the behavior of the pigment in the IR.
  • the opacity and whiteness measurements were carried out according to ISO 2471-1 and ISO 2470-2 respectively.
  • the tests show that the pigment used in test 1 has a discriminant absorption from 2% by weight of the pigment. Pigments other than that of test 1, for example of different shape and size, such as those of tests 2,3 and 4, also have a discriminant response in IR from a mass content of 2% .
  • the pigments of tests 2 and 3 have a titanium dioxide (TiO 2 ) core coated with antimony-doped tin oxide.
  • the pigments of tests 1 and 4 show a more intense IR response because they have a particle size greater than that of tests 2 and 3, which facilitates their retention within the paper structure during the manufacture of that -this.
  • the pigment of Run 4 has a particle size that greatly influences optical properties such as whiteness and opacity.
  • Tests A and B demonstrate that the increase in grammage does not significantly alter the IR absorption.
  • the level of pigment used in test 7 makes it possible to have a very high absorption in IR but that this leads to marked changes in optical properties such as whiteness and opacity.
  • the IR response of the pigments of the tests 5 and 6 has a look different from the other tests, which makes it possible to discriminate the IR signatures between them.
  • the two pigments reduce the optical properties such as whiteness and opacity which can be compensated by the addition of conventional paper charges. It can be seen that the pigments of tests 8 and 9 make it possible to have a very high absorption in IR, but this leads to marked changes in optical properties such as whiteness and opacity.
  • the pigments of the tests 10 and 11 have a small contribution on the IR absorption because their small particle size ( ⁇ 0.2 ⁇ ) does not allow to have optimal retention within the paper during its manufacture.
  • charge mixtures according to the invention can be used.

Abstract

The present invention relates to a security substrate comprising, dispersed in the mass thereof, an IR-absorbing particulate system, comprising: a mixture of at least one filler consisting of at least one metal oxide or metal oxide salt and of at least one filler consisting of at least one poor metal in ionic, molecular or atomic form, and/or - at least one filler consisting of at least one metal oxide or metal oxide salt and of at least one poor metal in ionic, molecular or atomic form, said particulate system giving said substrate a specific response in transmission in the IR, preferably with an absorption peak in the IR, in particular between 700 and 1000 nm, better still with several absorption peaks in the IR, in particular between 700 and 1000 nm.

Description

SUBSTRAT DE SECURITE  SAFETY SUBSTRATE
La présente invention concerne les substrats de sécurité et leurs procédés de fabrication.  The present invention relates to safety substrates and methods of making them.
Un substrat de sécurité est un substrat utilisé dans la fabrication de documents sécurisés, protégés contre la contrefaçon par des moyens rendant difficile leur reproduction ou leur falsification par des contrefacteurs.  A security substrate is a substrate used in the manufacture of secure documents, protected against counterfeiting by means making it difficult for them to be reproduced or falsified by counterfeiters.
L'invention s'applique à des substrats papetiers, destinés par exemple à la fabrication de billets de banque, ainsi qu'à des substrats en matière plastique, utilisés notamment dans la fabrication de billets de banque, d'éléments de sécurité tels que des fils de sécurité, des films ou des fo ils.  The invention applies to papermaking substrates, for example for the production of banknotes, as well as to plastic substrates, used especially in the manufacture of banknotes, security elements such as security threads, movies or fo they.
L'invention s'intéresse plus particulièrement à conférer au substrat une signature spécifique dans l'infrarouge (IR), cette signature permettant d'authentifier, voire d'identifier, le substrat par comparaison à une signature de référence.  The invention is more particularly concerned with conferring on the substrate a specific signature in the infrared (IR), this signature making it possible to authenticate or even identify the substrate by comparison with a reference signature.
Il est déjà bien connu d'utiliser des moyens de sécurité présentant une réponse spécifique dans l'IR.  It is already well known to use security means having a specific response in the IR.
En particulier, il a été proposé dans la demande de brevet EP 1790701 d'utiliser une encre pour impression taille douce absorbant dans l'IR de façon sélective à des longueurs d'onde particulières. La détection peut s'effectuer par réflexion à la surface du support imprimé avec une telle encre.  In particular, it has been proposed in patent application EP 1790701 to use an intaglio printing ink which absorbs IR in a selective manner at particular wavelengths. The detection can be carried out by reflection on the surface of the printed medium with such an ink.
La demande JP 2010084079 divulgue également une encre absorbant dans l'IR à base d'oxyde d'étain dopé par de l'antimoine et/ou d'oxyde d'indium dopé par de l'étain. L'utilisation de ces matériaux sensiblement incolores permet une meilleure compatibilité avec les pigments colorés utilisés par ailleurs pour conférer à l'encre la couleur recherchée. Là encore, la détection peut s'effectuer par réflexion.  JP 2010084079 also discloses an IR-absorbing ink based on tin oxide doped with antimony and / or indium oxide doped with tin. The use of these substantially colorless materials allows better compatibility with the colored pigments used elsewhere to give the ink the desired color. Here again, detection can be done by reflection.
La demande KR10-1131145 divulgue un papier de sécurité comprenant une substance absorbant dans l'IR. Cette demande vise à s'affranchir des problèmes de coloration rencontrés lors de l'utilisation de certaines substances connues, absorbant dans l'IR, et propose des matériaux de couleur blanche ou opaline à base de métaux alcalins, alcalinoterreux ou de transition.  Application KR10-1131145 discloses a security paper comprising an absorbent substance in the IR. This application aims to overcome the color problems encountered when using certain known substances, absorbing in the IR, and offers white or opaline materials based on alkali metals, alkaline earth or transition.
La demande WO 2012/103578 divulgue un matériau de sécurité comportant un milieu porteur polymère transparent ayant des nanoparticules absorbant dans l'IR dispersées dans le milieu. La demande WO 2007/132214 divulgue une composition comportant une encre et un matériau absorbant dans l'IR. The application WO 2012/103578 discloses a security material comprising a transparent polymeric carrier medium having nanoparticles absorbing in IR dispersed in the medium. WO 2007/132214 discloses a composition comprising an ink and an absorbent material in the IR.
WO 00/32700 divulgue une charge ou un revêtement papetier dérivé d'une argile hydratée ayant un oxyde métallique et/ou un précurseur d'un oxyde métallique d'un métal pauvre agrégé avec l'argile.  WO 00/32700 discloses a filler or a papermaking coating derived from hydrated clay having a metal oxide and / or a precursor of a metal oxide of a lean metal aggregated with the clay.
L'invention vise à améliorer encore la sécurisation des substrats afin notamment de conférer une signature, de préférence unitaire, dans l'IR détectable par machine en transmission, tout en préservant les propriétés optiques de blancheur et d'opacité du substrat lorsque celui-ci est papetier, et destiné par exemple à la fabrication de billets de banque.  The aim of the invention is to further improve the securing of the substrates, in particular to confer a signature, preferably a unitary signature, in the machine-detectable IR in transmission, while preserving the optical properties of whiteness and opacity of the substrate when the latter is papermaker, and intended for example for the manufacture of banknotes.
Par « signature unitaire », il faut comprendre une signature associée de façon bijective à un substrat donné ; par exemple le substrat utilisé pour la fabrication de tous les billets correspondant à une même coupure présente la même signature. Dans un autre exemple, tous les billets issus par une même banque centrale présentent la même signature, indépendamment de la valeur des coupures.  By "unitary signature", it is necessary to understand a signature associated bijectively with a given substrate; for example the substrate used for the manufacture of all the notes corresponding to the same cut has the same signature. In another example, all the notes issued by the same central bank have the same signature, regardless of the value of the cuts.
L'invention atteint cet objectif grâce à un substrat de sécurité comportant, dispersé dans sa masse, un système particulaire absorbant dans l'IR comprenant :  The invention achieves this objective by virtue of a security substrate comprising, dispersed in its mass, a particulate absorbing system in the IR comprising:
- un mélange d'au moins une charge constituée d'au moins un oxyde métallique ou sel d'oxyde métallique et d'au moins une charge constituée d'au moins un métal pauvre sous forme ionique, moléculaire ou atomique, et/ou au moins une charge constituée d'au moins un oxyde métallique ou sel d'oxyde métallique et d'au moins un métal pauvre sous forme ionique, moléculaire ou atomique,  a mixture of at least one filler consisting of at least one metal oxide or metal oxide salt and at least one filler consisting of at least one lean metal in ionic, molecular or atomic form, and / or at least one filler consisting of at least one metal oxide or salt of metal oxide and at least one lean metal in ionic, molecular or atomic form,
ledit système particulaire conférant audit substrat une réponse spécifique en transmission dans l'IR, de préférence avec au moins un pic d'absorption dans l'IR, notamment entre 700 et 1000 nm, mieux avec plusieurs pics d'absorption dans l'IR, notamment entre 700 et 1000 nm.  said particulate system conferring on said substrate a specific transmission response in the IR, preferably with at least one absorption peak in the IR, in particular between 700 and 1000 nm, better with several absorption peaks in the IR, in particular between 700 and 1000 nm.
Le métal pauvre peut être sous la forme ionique (sel), moléculaire (oxyde, notamment Sn02) dopée ou non, ou atomique (dopant, notamment Al ou Ga). Par "métal pauvre", on désigne un métal choisi dans le groupe constitué par l'aluminium, le bismuth, l'étain, le gallium, l'indium, le plomb, le polonium et le thallium, ces deux derniers métaux étant toutefois non préférés. The lean metal may be in the form of ionic (salt), molecular (oxide, especially SnO 2 ) doped or non-doped, or atomic (doping, in particular Al or Ga). "Lean metal" denotes a metal selected from the group consisting of aluminum, bismuth, tin, gallium, indium, lead, polonium and thallium, the latter two metals being, however, preferred.
Ledit oxyde ou sel d'oxyde métallique est de préférence respectivement un oxyde ou un sel d'oxyde d'un métal de transition ou d'un métalloïde. De façon préférée, la charge comporte comme oxyde métallique S1O2 ou ΤΊΟ2 et comme métal pauvre Sn. La taille des particules de la charge est de préférence comprise entre 0,2 et 5 μιη, étant de préférence inférieure à 1 μιη et/ou supérieure à 0,5μιη. La forme des particules de la charge peut être sphérique, plaquettaire ou aciculaire. Said oxide or metal oxide salt is preferably an oxide or an oxide salt of a transition metal or a metalloid, respectively. Preferably, the filler comprises as metal oxide S1O2 or ΤΊΟ2 and as poor metal Sn. The particle size of the charge is preferably between 0.2 and 5 μιη, being preferably less than 1 μιη and / or greater than 0.5μιη. The shape of the particles of the filler may be spherical, platelet or acicular.
De manière préférée, les particules de la charge ont un cœur en ΤΊΟ2 ou S1O2 recouvert d'oxyde d'étain dopé à l'antimoine.  Preferably, the particles of the filler have an en2 or S102 core coated with antimony-doped tin oxide.
L'invention permet, selon le système particulaire utilisé, d'avoir une signature spectrale dans l'IR unitaire, lisible en transmission sur la totalité du substrat, du fait de l'incorporation en masse durant sa fabrication. Par "IR", on désigne l'infra-rouge dans la bande spectrale 700nm - 1500nm. L'invention offre aussi l'avantage, de par la détection en transmission, d'éviter de brouiller les réponses d'autres éléments de sécurité détectés en réflexion. De plus, la détection peut s'effectuer selon l'invention dans des zones non imprimées, ce qui offre une sécurité complémentaire par rapport à une encre absorbant dans l'IR et détectée en réflexion.  The invention makes it possible, according to the particulate system used, to have a spectral signature in the unitary IR, readable in transmission over the entire substrate, due to the mass incorporation during its manufacture. By "IR" is meant infra-red in the spectral band 700 nm - 1500 nm. The invention also offers the advantage, by the detection in transmission, to avoid scrambling the responses of other security elements detected in reflection. In addition, the detection can be carried out according to the invention in non-printed areas, which offers a complementary security with respect to an absorbing ink in the IR and detected in reflection.
L'invention permet en outre, si on le souhaite, de s'affranchir de l'utilisation de certaines charges papetières conventionnelles telles que le dioxyde de titane, le kaolin ou le carbonate de calcium, ou d'en réduire la teneur, tout en atteignant les propriétés optiques de blancheur et d'opacité habituellement recherchées dans la fabrication d'un papier pour billet de banque notamment. Le substrat peut ainsi comporter moins de 4% en poids sec de ΤΊΟ2 sous forme de particules de T1O2, par rapport au poids sec total du substrat, mieux étant totalement dépourvu de ΤΊΟ2 sous forme de particules de T1O2. Le substrat peut comporter moins de 4% en poids sec de kaolin ou de carbonate de calcium par rapport au poids sec total du substrat.  The invention also makes it possible, if desired, to overcome the use of certain conventional paper-based fillers such as titanium dioxide, kaolin or calcium carbonate, or to reduce their content, while achieving the optical properties of whiteness and opacity usually sought in the manufacture of a paper for bank note including. The substrate may thus comprise less than 4% by dry weight of ΤΊΟ 2 in the form of particles of T1O2, with respect to the total dry weight of the substrate, more preferably completely free of ΤΊΟ 2 in the form of particles of TiO 2. The substrate may comprise less than 4% by dry weight of kaolin or calcium carbonate relative to the total dry weight of the substrate.
Un autre avantage de la présente invention est d'apporter de l'électro- conductivité au substrat, qui peut lui conférer une signature électrique spécifique et contribuer à dissiper les charges électrostatiques en cas de présence de zones étendues en matière plastique, notamment lors de l'utilisation conjointe à un substrat papetier d'au moins un élément en matière plastique tel qu'un fil de sécurité large, une bande de lamination, un foil ou un film, notamment en cas de billet hybride papier/plastique.  Another advantage of the present invention is to provide electroconductivity to the substrate, which can give it a specific electrical signature and contribute to dissipate the electrostatic charges in the presence of large areas of plastic material, in particular during use in conjunction with a paperboard substrate of at least one plastic element such as a wide security thread, a lamination tape, a foil or a film, especially in the case of hybrid paper / plastic ticket.
Système particulaire  Particulate system
Par « charge » il faut comprendre un composé introduit à l'état particulaire dans le reste du substrat, et qui demeure à l'état particulaire. Le système particulaire peut comprendre ou être constitué d'un mélange d'au moins une charge constituée d'au moins un oxyde métallique ou sel d'oxyde métallique, notamment un mica, et d'au moins un métal pauvre sous forme ionique, moléculaire, ou atomique. By "charge" is meant a compound introduced in the particulate state into the rest of the substrate, and which remains in the particulate state. The particulate system may comprise or consist of a mixture of at least one filler composed of at least one metal oxide or metal oxide salt, in particular a mica, and at least one lean metal in ionic, molecular form , or atomic.
Le système particulaire peut encore comprendre ou être constitué par une charge constituée d'au moins un oxyde métallique ou sel d'oxyde métallique, notamment un mica, et d'au moins un métal pauvre sous forme ionique, moléculaire, ou atomique.  The particulate system may further comprise or consist of a filler consisting of at least one metal oxide or metal oxide salt, especially a mica, and at least one lean metal in ionic, molecular, or atomic form.
Il s'agit en particulier d'une charge de type cœur-écorce (« core-shell » en anglais) comprenant un cœur constitué dudit oxyde métallique ou sel d'oxyde métallique et d'une écorce constituée dudit métal pauvre sous forme ionique, moléculaire ou atomique, de préférence sous forme moléculaire.  This is in particular a core-shell type charge comprising a core consisting of said metal oxide or metal oxide salt and a bark consisting of said lean metal in ionic form, molecular or atomic, preferably in molecular form.
Selon une variante il s'agit d'une charge dopée, ledit oxyde métallique ou sel d'oxyde métallique étant dopé par ledit métal pauvre sous forme atomique.  According to a variant it is a doped charge, said metal oxide or metal oxide salt being doped with said poor metal in atomic form.
L'oxyde métallique est de préférence choisi parmi Ti02, ZnO, Zr02, Ce02, Si02, A1203, le mica, le talc et leurs mélanges. L'oxyde métallique peut notamment présenter un indice de réfraction supérieur à 1,8 (Ti02, ZnO, ...) ou inférieur à 1,8 (Si02,Al203, ...) permettant par exemple d'avoir une charge incolore ne modifiant pas les propriétés optiques d'un substrat papetier. The metal oxide is preferably selected from Ti0 2, ZnO, Zr0 2, Ce0 2, Si0 2, A1 2 0 3, mica, talc and mixtures thereof. The metal oxide may especially have a refractive index greater than 1.8 (Ti0 2 , ZnO, ...) or less than 1.8 (Si0 2 , Al 2 O 3 , ...) allowing, for example, have a colorless charge that does not modify the optical properties of a paperboard substrate.
L'oxyde métallique de métal pauvre dopé est de préférence dopé avec des métalloïdes ou des métaux pauvres, notamment avec de l'antimoine, de l'aluminium ou du germanium. Selon les métaux pauvres et métalloïdes choisis, on peut modifier l'absorption infra-rouge et ainsi obtenir une réponse spectrale différente, pour la rendre spécifique à chaque substrat si on le souhaite.  The doped lean metal oxide is preferably doped with metalloids or poor metals, especially with antimony, aluminum or germanium. Depending on the poor metals and metalloids selected, the infra-red absorption can be modified and thus obtain a different spectral response, to make it specific to each substrate if desired.
Le métal pauvre peut être sous forme d'oxyde d'étain.  The lean metal can be in the form of tin oxide.
L'oxyde métallique de métal pauvre, notamment dopé, d'une part, et l'oxyde métallique ou le sel d'oxyde métallique, notamment un mica, d'autre part, peuvent constituer respectivement l'écorce et le cœur d'un pigment à structure cœur écorce. Le cœur peut être creux.  The metal oxide of poor metal, in particular doped metal, on the one hand, and the metal oxide or the metal oxide salt, in particular a mica, on the other hand, can respectively constitute the bark and the core of a pigment with core bark structure. The heart can be hollow.
Le système particulaire peut être constitué de particules de taille maximale inférieure ou égale à 100 μιη, de préférence inférieure à 60 μιη.  The particulate system may consist of particles of maximum size less than or equal to 100 μιη, preferably less than 60 μιη.
Le système particulaire peut être constitué de particules de taille moyenne en nombre D50 inférieure ou égale à 10 μιη, de préférence à 5 μιη.  The particulate system can consist of particles of average size D50 less than or equal to 10 μιη, preferably 5 μιη.
Le système particulaire peut être constitué de particules de taille moyenne en nombre D50 inférieure ou égale à 1 μιη, de préférence à 0,5 μιη. Le système particulaire peut être constitué de particules de taille maximale inférieure ou égale à 5μιη, de préférence inférieure à 1 μιη. Le système particulaire peut être constitué de particules de taille minimale supérieure ou égale à 0,2 μιη, de préférence à 0,5 μιη. The particulate system can consist of particles of average size D50 less than or equal to 1 μιη, preferably 0.5 μιη. The particulate system may consist of particles with a maximum size of less than or equal to 5 μm, preferably less than 1 μm. The particulate system may consist of particles of minimum size greater than or equal to 0.2 μιη, preferably 0.5 μιη.
Le système particulaire peut comporter et/ou être constitué de particules sphériques. En variante, le système particulaire peut comporter et/ou être constitué de particules aciculaires et/ou plaquettaires, ce qui offre l'avantage d'accroître la surface spécifique.  The particulate system may comprise and / or consist of spherical particles. Alternatively, the particulate system may comprise and / or consist of acicular and / or platelet particles, which has the advantage of increasing the specific surface area.
Le système particulaire peut comporter un seul oxyde métallique dopé ou en variante plusieurs oxydes métalliques dopés.  The particulate system may comprise a single doped metal oxide or alternatively several doped metal oxides.
Le système particulaire peut être sensiblement blanc et opaque à la lumière visible, ou en variante être transparent.  The particulate system may be substantially white and opaque to visible light, or alternatively may be transparent.
Le substrat comporte de préférence entre 0,1 et 20 % en masse, par rapport à la masse totale du substrat fini à sec, dudit système particulaire, mieux entre 0,2 et 5, encore mieux entre 0,5 et 2,5%.  The substrate preferably comprises between 0.1 and 20% by weight, relative to the total mass of the dry-finished substrate, of said particulate system, better still between 0.2 and 5, better still between 0.5 and 2.5%. .
De préférence, la quantité dudit système particulaire est ajustée pour ne pas assombrir outre mesure le substrat en lui donnant un aspect grisâtre.  Preferably, the amount of said particulate system is adjusted so as not to unduly darken the substrate giving it a greyish appearance.
Substrat  substratum
Le substrat peut être papetier. Le substrat peut notamment convenir à la fabrication de billets de banque. Le substrat peut être fïligrané. Le substrat peut encore être non fibreux. Le substrat, lorsque papetier, peut comporter des fibres naturelles et/ou synthétiques. Dans le cas notamment d'un substrat pour billets de banque, celui-ci peut comporter des fibres de lin et/ou des fibres de coton, notamment des linters de coton.  The substrate can be paper. The substrate may especially be suitable for the manufacture of banknotes. The substrate can be highlighted. The substrate may still be non-fibrous. The substrate, when paper maker, may comprise natural and / or synthetic fibers. In the case in particular of a substrate for banknotes, it may comprise flax fibers and / or cotton fibers, in particular cotton linters.
Le substrat peut être en matière plastique, c'est-à-dire polymérique, notamment en polyéthylène téréphtalate (PET), polycarbonate (PC), polypropylène (PP) ou polyéthylène (PE). La matière plastique peut être extrudée ou co-extrudée avec le système particulaire.  The substrate may be of plastic, that is to say polymeric, in particular polyethylene terephthalate (PET), polycarbonate (PC), polypropylene (PP) or polyethylene (PE). The plastic material can be extruded or coextruded with the particulate system.
L'invention a encore pour objet un document de sécurité comportant un substrat selon l'invention, notamment un billet de banque.  The invention also relates to a security document comprising a substrate according to the invention, in particular a banknote.
L'invention a encore pour objet un fil, un film, une bande de lamination ou un foil de sécurité comportant un substrat selon l'invention.  The invention also relates to a wire, a film, a lamination tape or a foil security comprising a substrate according to the invention.
Exemples  Examples
Échantillons réalisés Des échantillons de papier sont réalisés à l'aide d'une machine à papier à partir d'une composition fibreuse 100 % linters de coton. Samples made Paper samples are made using a paper machine from a fibrous 100% cotton linters composition.
Le système particulaire pour les échantillons selon l'invention est introduit dans la dispersion fibreuse 100% linters de coton avant la fabrication du papier. The particulate system for the samples according to the invention is introduced into the fibrous dispersion 100% cotton linters before papermaking.
Références : References :
Figure imgf000009_0001
Figure imgf000009_0001
Systèmes particulaires testés (grammage papiers Particulate systems tested (paper weight
Figure imgf000009_0002
Figure imgf000009_0002
Mesures  Measures
Des mesures d'absorption IR (taux d'absorption en pourcentage) sont effectuées transmission entre 400 nm et 1000 nm. Les spectres d'absorption sont ensuite normalisés (en abscisses) à une longueur d'onde de 500 nm pour analyser le comportement du pigment dans l'IR. IR absorption measurements (percentage absorption rate) are carried out between 400 nm and 1000 nm. Absorption spectra are then normalized (as abscissa) at a wavelength of 500 nm to analyze the behavior of the pigment in the IR.
Les mesures d'opacité et de blancheur ont été réalisées selon respectivement les normes ISO 2471-1 et ISO 2470-2  The opacity and whiteness measurements were carried out according to ISO 2471-1 and ISO 2470-2 respectively.
Résultats  Results
Sur les graphiques : en ordonnée on a le pourcentage d'absorption et en abscisse la longueur d'onde.  On the graphs: on the ordinate we have the absorption percentage and on the abscissa the wavelength.
Les essais montrent que le pigment utilisé lors de l'essai 1 présente une absorption discriminante à partir de 2% en masse du pigment. Des pigments autres que celui de l'essai 1, par exemple de forme et de taille différentes, tels que ceux des essais 2,3 et 4, présentent aussi une réponse discriminante dans l'IR à partir d'une teneur massique de 2%. Les pigments des essais 2 et 3 présentent un cœur en dioxyde de titane (Ti02), recouvert d'oxyde d'étain dopé à l'antimoine. The tests show that the pigment used in test 1 has a discriminant absorption from 2% by weight of the pigment. Pigments other than that of test 1, for example of different shape and size, such as those of tests 2,3 and 4, also have a discriminant response in IR from a mass content of 2% . The pigments of tests 2 and 3 have a titanium dioxide (TiO 2 ) core coated with antimony-doped tin oxide.
Les pigments des essais 1 et 4 présentent une réponse dans l'IR plus intense car ils ont une taille de particule supérieure à celle des essais 2 et 3, ce qui facilite leur rétention au sein de la structure du papier lors de la fabrication de celui-ci.  The pigments of tests 1 and 4 show a more intense IR response because they have a particle size greater than that of tests 2 and 3, which facilitates their retention within the paper structure during the manufacture of that -this.
Des mesures dont les résultats sont reportés dans les tableaux ci-dessous ont permis de constater que les pigments des essais 1,2,3 ont pu être incorporés dans le papier en substitution d'une charge de référence de 5% de dioxyde de titane, sans dégradation outre mesure de la blancheur, qui reste acceptable, et en conservant l'opacité, voire en l'améliorant malgré le fait que la charge introduite ne présente plus que 2,5% ou 2% au lieu de 5%.  Measurements whose results are reported in the tables below made it possible to note that the pigments of the tests 1,2,3 could be incorporated in the paper in substitution of a reference charge of 5% of titanium dioxide, without undue degradation of the whiteness, which remains acceptable, and maintaining opacity, even improving it despite the fact that the introduced charge has more than 2.5% or 2% instead of 5%.
Le pigment de l'essai 4 présente une taille de particule qui influence beaucoup plus les propriétés optiques telles que la blancheur et l'opacité.  The pigment of Run 4 has a particle size that greatly influences optical properties such as whiteness and opacity.
Les essais A et B mettent en évidence que l'augmentation de grammage ne modifie pas de façon significative l'absorption IR.  Tests A and B demonstrate that the increase in grammage does not significantly alter the IR absorption.
On voit également que le taux de pigment utilisé dans l'essai 7 permet d'avoir une très forte absorption dans l'IR mais que cela entraine des modifications marquées des propriétés optiques telles que la blancheur et l'opacité.  It can also be seen that the level of pigment used in test 7 makes it possible to have a very high absorption in IR but that this leads to marked changes in optical properties such as whiteness and opacity.
Par ailleurs, la réponse IR des pigments des essais 5 et 6 a une allure différente des autres essais, ce qui permet de discriminer les signatures IR entre elles. Enfin les deux pigments diminuent les propriétés optiques telles que la blancheur et l'opacité ce qui pourra être compensé par l'ajout de charges papetières conventionnelles. On voit que les pigments des essais 8 et 9 permettent d'avoir une très forte absorption dans l'IR mais cela entraine des modifications marquées des propriétés optiques telles que la blancheur et l'opacité. Moreover, the IR response of the pigments of the tests 5 and 6 has a look different from the other tests, which makes it possible to discriminate the IR signatures between them. Finally, the two pigments reduce the optical properties such as whiteness and opacity which can be compensated by the addition of conventional paper charges. It can be seen that the pigments of tests 8 and 9 make it possible to have a very high absorption in IR, but this leads to marked changes in optical properties such as whiteness and opacity.
Les pigments des essais 10 et 11 ont une faible contribution sur l'absorption IR car leur faible taille de particules (< 0.2μιη) ne permet pas d'avoir une rétention optimale au sein du papier lors de sa fabrication.  The pigments of the tests 10 and 11 have a small contribution on the IR absorption because their small particle size (<0.2μιη) does not allow to have optimal retention within the paper during its manufacture.
Figure imgf000011_0001
Figure imgf000011_0001
Figure imgf000011_0002
Figure imgf000011_0002
Figure imgf000011_0003
Figure imgf000011_0003
L'invention n'est pas limitée aux exemples qui viennent d'être donnés. The invention is not limited to the examples which have just been given.
En particulier, des mélanges de charges selon l'invention peuvent être utilisés.  In particular, charge mixtures according to the invention can be used.

Claims

REVENDICATIONS
1. Substrat de sécurité papetier comportant dispersé dans sa masse un système particulaire absorbant dans l'IR, comprenant : A papermaking security substrate comprising dispersed in its mass a particulate absorbing system in IR, comprising:
- un mélange d'au moins une charge constituée d'au moins un oxyde métallique ou sel d'oxyde métallique et d'au moins une charge constituée d'au moins un métal pauvre sous forme ionique, moléculaire ou atomique, et/ou  a mixture of at least one filler consisting of at least one metal oxide or metal oxide salt and at least one filler consisting of at least one lean metal in ionic, molecular or atomic form, and / or
- au moins une charge constituée d'au moins un oxyde métallique ou sel d'oxyde métallique et d'au moins un métal pauvre sous forme ionique, moléculaire ou atomique,  at least one filler consisting of at least one metal oxide or salt of metal oxide and at least one lean metal in ionic, molecular or atomic form,
ledit système particulaire conférant audit substrat une réponse spécifique en transmission dans l'IR, de préférence avec au moins un pic d'absorption dans l'IR, notamment entre 700 et 1000 nm, mieux avec plusieurs pics d'absorption dans l'IR, notamment entre 700 et 1000 nm.  said particulate system conferring on said substrate a specific transmission response in the IR, preferably with at least one absorption peak in the IR, in particular between 700 and 1000 nm, better with several absorption peaks in the IR, in particular between 700 and 1000 nm.
2. Substrat selon la revendication 1, le métal pauvre étant sous forme ionique 2. Substrate according to claim 1, the lean metal being in ionic form
(sel), moléculaire (oxyde, notamment SnC ) dopée ou non, ou atomique (dopant, notamment Al ou Ga). (salt), molecular (doped, in particular SnC) doped or non-doped, or atomic (doping, in particular Al or Ga).
3. Substrat selon la revendication 2, ledit oxyde ou sel d'oxyde métallique étant respectivement un oxyde ou un sel d'oxyde d'un métal de transition ou d'un métalloïde.  3. The substrate according to claim 2, said oxide or metal oxide salt being respectively an oxide or a salt of oxide of a transition metal or a metalloid.
4. Substrat selon la revendication 1, le système particulaire comprenant un mélange d'au moins une charge constituée d'au moins un oxyde métallique ou sel d'oxyde métallique, notamment un mica, et d'au moins une charge constituée d'au moins un métal pauvre sous forme ionique, moléculaire ou atomique.  4. Substrate according to claim 1, the particulate system comprising a mixture of at least one filler consisting of at least one metal oxide or metal oxide salt, in particular a mica, and at least one filler consisting of less a lean metal in ionic, molecular or atomic form.
5. Substrat selon la revendication 1 , le système particulaire comprenant une charge constituée d'au moins un oxyde métallique ou sel d'oxyde métallique, notamment un mica, et d'au moins un métal pauvre sous forme ionique, moléculaire ou atomique.  5. Substrate according to claim 1, the particulate system comprising a filler consisting of at least one metal oxide or metal oxide salt, especially a mica, and at least one lean metal in ionic, molecular or atomic form.
6. Substrat selon l'une quelconque des revendications précédentes, l'oxyde métallique étant choisi parmi T1O2, ZnO, ZrCh, CeC , S1O2, AI2O3, le mica, le talc, et leurs mélanges, de préférence T1O2, S1O2, ZnO, mica ou talc, mieux T1O2 ou S1O2.  6. Substrate according to any one of the preceding claims, the metal oxide being selected from among TiO2, ZnO, ZrCh, CeC, SiO2, Al2O3, mica, talc, and mixtures thereof, preferably TiO2, SiO2, ZnO, mica. or talc, better T1O2 or S1O2.
7. Substrat selon l'une quelconque des revendications précédentes, le métal pauvre étant sous forme d'oxyde métallique de métal pauvre dopé avec des métalloïdes ou des métaux pauvres. The substrate of any preceding claim, wherein the lean metal is in the form of a lean metal oxide doped with metalloids or poor metals.
8. Substrat selon la revendication 7, l'oxyde métallique de métal pauvre dopé étant dopé avec de l'antimoine. 8. Substrate according to claim 7, the doped lean metal oxide being doped with antimony.
9. Substrat selon la revendication 7, l'oxyde métallique de métal pauvre dopé étant dopé avec de l'aluminium ou du germanium.  9. Substrate according to claim 7, the doped lean metal oxide being doped with aluminum or germanium.
10. Substrat selon l'une quelconque des revendications précédentes, l'oxyde métallique de métal pauvre dopé étant un oxyde d'étain, ou d'indium, de préférence d'étain.  The substrate of any preceding claim, the doped lean metal oxide being tin oxide, or indium oxide, preferably tin.
11. Substrat selon l'une quelconque des revendications précédentes, la charge étant constituée de particules ayant un cœur S1O2 ou T1O2 recouvert d'oxyde d'étain dopé à l'antimoine.  11. Substrate according to any one of the preceding claims, the filler consisting of particles having a core S1O2 or T1O2 coated with antimony-doped tin oxide.
12. Substrat selon l'une quelconque des revendications précédentes, comportant entre 0,1 et 20 % en masse, par rapport à la masse totale du substrat, dudit système particulaire, mieux entre 0,2 et 5, encore mieux entre 0,5 et 2,5.  12. Substrate according to any one of the preceding claims, comprising between 0.1 and 20% by weight, relative to the total mass of the substrate, of said particulate system, better still between 0.2 and 5, more preferably between 0.5. and 2.5.
13. Substrat selon l'une quelconque des revendications précédentes, étant papetier.  Substrate according to any one of the preceding claims, being a papermaker.
14. Substrat selon l'une quelconque des revendications 1 à 12, étant polymérique, notamment en PET, PC, PP ou PE.  14. Substrate according to any one of claims 1 to 12, being polymeric, in particular PET, PC, PP or PE.
15. Substrat selon l'une quelconque des revendications précédentes, le métal pauvre d'une part, et l'oxyde métallique ou le sel d'oxyde métallique, notamment un mica, d'autre part, constituant respectivement l'écorce et le cœur d'un pigment à structure cœur écorce.  15. Substrate according to any one of the preceding claims, the lean metal on the one hand, and the metal oxide or the metal oxide salt, in particular a mica, on the other hand constituting respectively the bark and the heart. a pigment with a core bark structure.
16. Substrat selon la revendication 15, le cœur étant creux.  16. Substrate according to claim 15, the core being hollow.
17. Substrat selon l'une quelconque des revendications précédentes, comportant moins de 4% en poids sec de T1O2 sous forme de particules de T1O2, par rapport au poids sec total du substrat, mieux étant totalement dépourvu de T1O2 sous forme de particules de  17. Substrate according to any one of the preceding claims, comprising less than 4% by dry weight of T1O2 in the form of T1O2 particles, relative to the total dry weight of the substrate, better being totally free of TiO 2 in the form of
18. Substrat selon l'une quelconque des revendications précédentes, comportant moins de 4% en poids sec de kaolin ou de carbonate de calcium par rapport au poids sec total du substrat. 18. Substrate according to any one of the preceding claims, comprising less than 4% by dry weight of kaolin or calcium carbonate relative to the total dry weight of the substrate.
19. Substrat selon l'une quelconque des revendications précédentes, le système particulaire étant constitué de particules de taille moyenne en nombre D50 inférieure ou égale à ΙΟμιη, de préférence inférieure à 5μιη. 19. Substrate according to any one of the preceding claims, the particulate system consisting of particles of average size D50 less than or equal to ΙΟμιη, preferably less than 5μιη.
20. Substrat selon l'une quelconque des revendications 1 à 17, le système particulaire étant constitué de particules de taille moyenne en nombre D50 inférieure ou égale à Ιμιη, de préférence inférieure à 0,5 μιη. 20. Substrate according to any one of claims 1 to 17, the particulate system consisting of particles of average size D50 less than or equal to Ιμιη, preferably less than 0.5 μιη.
21. Substrat selon l'une quelconque des revendications précédentes, le système particulaire comportant et/ou étant constitué de particules sphériques.  21. Substrate according to any one of the preceding claims, the particulate system comprising and / or consisting of spherical particles.
22. Substrat selon l'une quelconque des revendications 1 à 20, le système particulaire comportant et/ou étant constitué de particules aciculaires et/ou plaquettaires  22. Substrate according to any one of claims 1 to 20, the particulate system comprising and / or consisting of acicular and / or platelet particles.
23. Substrat selon l'une quelconque des revendications précédentes, le système particulaire comportant un seul oxyde métallique dopé.  23. Substrate according to any one of the preceding claims, the particulate system comprising a single doped metal oxide.
24. Substrat selon l'une quelconque des revendications 1 à 22, le système particulaire comportant plusieurs oxydes métalliques dopés.  24. Substrate according to any one of claims 1 to 22, the particulate system comprising a plurality of doped metal oxides.
25. Substrat selon l'une quelconque des revendications précédentes, le système particulaire étant sensiblement blanc et opaque à la lumière visible.  25. Substrate according to any one of the preceding claims, the particulate system being substantially white and opaque to visible light.
26. Substrat selon l'une quelconque des revendications 1 à 24, le système particulaire étant transparent.  26. Substrate according to any one of claims 1 to 24, the particulate system being transparent.
27. Document de sécurité comportant un substrat selon l'une quelconque des revendications précédentes, le substrat étant notamment fïligrané  27. Security document comprising a substrate according to any one of the preceding claims, the substrate being in particular imigranated
28. Fil, film ou foil de sécurité comportant un substrat selon l'une quelconque des revendications 1 à 26 dont la revendication 14.  28. Safety wire, film or foil comprising a substrate according to any one of claims 1 to 26, claim 14.
PCT/EP2017/076637 2016-10-20 2017-10-18 Security substrate WO2018073320A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17791021.3A EP3529416B1 (en) 2016-10-20 2017-10-18 Security substrate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1660177 2016-10-20
FR1660177A FR3057881B1 (en) 2016-10-20 2016-10-20 SECURITY SUBSTRATE

Publications (1)

Publication Number Publication Date
WO2018073320A1 true WO2018073320A1 (en) 2018-04-26

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Country Status (3)

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EP (1) EP3529416B1 (en)
FR (1) FR3057881B1 (en)
WO (1) WO2018073320A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000032700A1 (en) 1998-12-02 2000-06-08 Engelhard Corporation High opacity kaolin hybrid pigments
EP1790701A1 (en) 2005-11-25 2007-05-30 Sicpa Holding S.A. IR-absorbing intaglio ink
WO2007132214A1 (en) 2006-05-13 2007-11-22 Inovink Limited Security inks containing infrared absorbing metal compounds
JP2010084079A (en) 2008-10-01 2010-04-15 Kyodo Printing Co Ltd Infrared absorbing ink for preventing counterfeiting and printed matter
KR101131145B1 (en) 2010-02-02 2012-04-03 한국조폐공사 Infrared Absorption Paper for counterfeit prevention
WO2012103578A1 (en) 2011-02-01 2012-08-09 Commonwealth Scientific And Industrial Research Organisation Transparent infrared absorbing materials

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000032700A1 (en) 1998-12-02 2000-06-08 Engelhard Corporation High opacity kaolin hybrid pigments
EP1790701A1 (en) 2005-11-25 2007-05-30 Sicpa Holding S.A. IR-absorbing intaglio ink
WO2007132214A1 (en) 2006-05-13 2007-11-22 Inovink Limited Security inks containing infrared absorbing metal compounds
JP2010084079A (en) 2008-10-01 2010-04-15 Kyodo Printing Co Ltd Infrared absorbing ink for preventing counterfeiting and printed matter
KR101131145B1 (en) 2010-02-02 2012-04-03 한국조폐공사 Infrared Absorption Paper for counterfeit prevention
WO2012103578A1 (en) 2011-02-01 2012-08-09 Commonwealth Scientific And Industrial Research Organisation Transparent infrared absorbing materials

Also Published As

Publication number Publication date
EP3529416B1 (en) 2021-08-04
FR3057881A1 (en) 2018-04-27
EP3529416A1 (en) 2019-08-28
FR3057881B1 (en) 2020-06-12

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