EP3529416A1 - Substrat de sécurité - Google Patents
Substrat de sécuritéInfo
- Publication number
- EP3529416A1 EP3529416A1 EP17791021.3A EP17791021A EP3529416A1 EP 3529416 A1 EP3529416 A1 EP 3529416A1 EP 17791021 A EP17791021 A EP 17791021A EP 3529416 A1 EP3529416 A1 EP 3529416A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- substrate according
- metal oxide
- substrate
- doped
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 72
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 46
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 46
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 27
- 239000000945 filler Substances 0.000 claims abstract description 20
- 238000010521 absorption reaction Methods 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 19
- 239000000049 pigment Substances 0.000 claims description 16
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000010445 mica Substances 0.000 claims description 9
- 229910052618 mica group Inorganic materials 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 229910052681 coesite Inorganic materials 0.000 claims description 6
- 229910052906 cristobalite Inorganic materials 0.000 claims description 6
- 229910052682 stishovite Inorganic materials 0.000 claims description 6
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 6
- 229910001887 tin oxide Inorganic materials 0.000 claims description 6
- 229910052905 tridymite Inorganic materials 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 229910052752 metalloid Inorganic materials 0.000 claims description 5
- 150000002738 metalloids Chemical class 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 4
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims description 3
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 3
- 229910052733 gallium Inorganic materials 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000454 talc Substances 0.000 claims description 3
- 229910052623 talc Inorganic materials 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 2
- 229910052787 antimony Inorganic materials 0.000 claims description 2
- 229910052732 germanium Inorganic materials 0.000 claims description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 2
- 229910003437 indium oxide Inorganic materials 0.000 claims description 2
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000012798 spherical particle Substances 0.000 claims description 2
- 229910052723 transition metal Inorganic materials 0.000 claims description 2
- 150000003624 transition metals Chemical class 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims 2
- 235000012239 silicon dioxide Nutrition 0.000 claims 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 229910052593 corundum Inorganic materials 0.000 claims 1
- 229910001845 yogo sapphire Inorganic materials 0.000 claims 1
- 239000011787 zinc oxide Substances 0.000 claims 1
- 239000000123 paper Substances 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 229920000742 Cotton Polymers 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000011087 paperboard Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 241000208202 Linaceae Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 150000005324 oxide salts Chemical class 0.000 description 1
- 229910052699 polonium Inorganic materials 0.000 description 1
- HZEBHPIOVYHPMT-UHFFFAOYSA-N polonium atom Chemical compound [Po] HZEBHPIOVYHPMT-UHFFFAOYSA-N 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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.
Landscapes
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- Paper (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1660177A FR3057881B1 (fr) | 2016-10-20 | 2016-10-20 | Substrat de securite |
PCT/EP2017/076637 WO2018073320A1 (fr) | 2016-10-20 | 2017-10-18 | Substrat de sécurité |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3529416A1 true EP3529416A1 (fr) | 2019-08-28 |
EP3529416B1 EP3529416B1 (fr) | 2021-08-04 |
Family
ID=57750207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17791021.3A Active EP3529416B1 (fr) | 2016-10-20 | 2017-10-18 | Substrat de sécurité |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3529416B1 (fr) |
FR (1) | FR3057881B1 (fr) |
WO (1) | WO2018073320A1 (fr) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU1926600A (en) * | 1998-12-02 | 2000-06-19 | Engelhard Corporation | High opacity kaolin hybrid pigments |
SI1790701T2 (sl) | 2005-11-25 | 2012-05-31 | Sicpa Holding Sa | Ir absorbirajoča tiskarska barva za intaglio |
GB2438196B (en) * | 2006-05-13 | 2008-05-28 | Inovink Ltd | Improvements in or relating to printing |
JP5489031B2 (ja) | 2008-10-01 | 2014-05-14 | 共同印刷株式会社 | 偽造防止用赤外線吸収インキ及び印刷物 |
KR101131145B1 (ko) | 2010-02-02 | 2012-04-03 | 한국조폐공사 | 적외선 흡수 특성을 가지는 위조방지용 용지 |
MX365504B (es) * | 2011-02-01 | 2019-06-05 | Australia Reserve Bank | Materiales absorbentes de infrarrojo transparentes. |
-
2016
- 2016-10-20 FR FR1660177A patent/FR3057881B1/fr not_active Expired - Fee Related
-
2017
- 2017-10-18 WO PCT/EP2017/076637 patent/WO2018073320A1/fr unknown
- 2017-10-18 EP EP17791021.3A patent/EP3529416B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
FR3057881A1 (fr) | 2018-04-27 |
EP3529416B1 (fr) | 2021-08-04 |
FR3057881B1 (fr) | 2020-06-12 |
WO2018073320A1 (fr) | 2018-04-26 |
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