EP4611999A1 - Dispositif optique de sécurité - Google Patents
Dispositif optique de sécuritéInfo
- Publication number
- EP4611999A1 EP4611999A1 EP23798181.6A EP23798181A EP4611999A1 EP 4611999 A1 EP4611999 A1 EP 4611999A1 EP 23798181 A EP23798181 A EP 23798181A EP 4611999 A1 EP4611999 A1 EP 4611999A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- glue
- pattern
- spectral band
- optical security
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
- B42D25/45—Associating two or more layers
- B42D25/465—Associating two or more layers using chemicals or adhesives
- B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/378—Special inks
- B42D25/387—Special inks absorbing or reflecting ultraviolet light
-
- 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
- B42D25/40—Manufacture
- B42D25/45—Associating two or more layers
- B42D25/455—Associating two or more layers using heat
Definitions
- the present invention relates to the field of security films.
- identity documents include at least one layer of polycarbonate, for example identity cards in smart card format, known as “ID1”, personal data pages in passports, driving licenses, etc. ...
- a polycarbonate layer is personalized by laser marking.
- DOVIDs are incorporated by a heat transfer process onto a polycarbonate sheet, which is assembled with other polycarbonate sheets containing other functions of the identity document. All these sheets are then hot laminated under pressure to obtain the final identity document.
- the optically variable element (DOVID) used to secure the identity document is not made of polycarbonate. Therefore, during the fusion of the polycarbonate layers which sandwich the optically variable element, the latter does not fuse with said polycarbonate layers. There is therefore a risk of extraction of the DOVID at this location of the identity document. It must therefore be constituted in such a way that any attempt at extraction leads to at least partial destruction of the DOVID.
- DOVIDs include an adhesive layer whose resins are chosen to obtain optimal adhesion.
- An object of the invention is to provide an optical security component that can be heat transferred onto a polycarbonate sheet and hot laminated under pressure, which aims to limit or even avoid its reuse by delamination in the manufacture of a false identity document. .
- the present invention relates to an optical security device (1000) transferable to a polycarbonate substrate (200) of a document to be secured, the device comprising:
- optical security component (100) further comprises:
- the first glue layer (150) and the second glue layer (160) being discontinuous in at least one direction of elongation and representing a set of at least one predetermined pattern.
- the first glue layer (150) presents a first bonding force on the polycarbonate substrate (200), and the second glue layer (160) presents a second bonding force on the polycarbonate substrate (200). , different from the first bonding force. It can be expected that the first layer of glue (150) is in the form of at least one of:
- the second layer of glue (160) is in the form of at least one of:
- the second glue layer (160) is printed on the first glue layer (150), so that the first glue layer (150) and the second glue layer (160) are at least locally superimposed.
- the second layer of glue (160) is coplanar with the first layer of glue (150), the first layer of glue (150) comprising at least one recess whose shape is complementary to that of the pattern of the second layer glue (160), the pattern of the second glue layer (160) being printed in said recess, so that the first glue layer (150) and the second glue layer (160) are at least locally adjacent.
- either only the first layer of glue (150) comprises luminescent pigments which emit in a first spectral band when they are excited in a first spectral band;
- either only the second glue layer (160) comprises luminescent pigments which emit in a second spectral band when they are excited in a second spectral band;
- either the first glue layer (150) and the second glue layer (160) comprise different luminescent pigments which emit in a respective color in the same spectral band when they are excited in the same spectral band;
- first glue layer (150) comprises luminescent pigments which emit in a first spectral band when excited by a first spectral band
- second glue layer (160) comprises luminescent pigments which emit in a second spectral band when they are excited by a second spectral band, different from the first spectral band.
- At least one of the first pattern and the second pattern is invisible to the naked eye under natural light, but becomes visible to the naked eye when the luminescent pigments emit.
- the surface ratio between the first pattern and the second pattern is between two predetermined values.
- the invention relates to a secure document comprising:
- FIG. 1 illustrates an optical security component according to the prior art before transfer
- FIG. 2 illustrates an optical security component according to the prior art after transfer
- FIG. 3 illustrates an optical security component according to the invention before transfer
- FIG. 4 illustrates the optical security component of Figure 3 after transfer, hot deposition and lamination
- FIG. 5 illustrates a partial view of an optical security component according to the invention in exploded, three-quarter view, and in partial transparency
- FIG. 6 illustrates an embodiment of a first pattern and a second pattern according to the invention, in top view
- FIG. 7 illustrates another embodiment of a first pattern and a second pattern according to the invention, in top view
- FIG. 8 illustrates another embodiment of a first pattern and a second pattern according to the invention, in top view
- FIG. 9 illustrates the embodiment of the first pattern and the second pattern of Figure 8, in cross section
- FIG. 10 illustrates another embodiment of the first pattern and the second pattern of Figure 8, in cross section
- FIG. 11 is a photograph of an embodiment of an optical security component according to the invention after a “cross test”;
- FIG. 12 illustrates an optical security component according to the invention before transfer
- FIG. 13 illustrates the optical security component of Figure 12 after transfer, hot deposition and lamination
- FIG. 14 illustrates the selective destruction on the optical component of Figure 4.
- optical security device 1000 An optical security device 1000 according to the prior art is illustrated in Figure 1 and Figure 2.
- the optical component 100 is intended to be transferred to a substrate of a document to be secured.
- the document to be secured is an official, state identity document, for example a national identity card, a passport, a driving license, etc.
- the document to be secured comprises a polycarbonate page 200 or is made up of a polycarbonate page 200.
- the polycarbonate page 200 comprises a plurality of polycarbonate sheets 200 laminated together.
- the polycarbonate page 200 is the data page, called "datapage", which includes a certain number of variable data relating to the bearer of the passport.
- the optical security component 100 is associated with a support film 110.
- the support film 110 is made of plastic polymer (PET, PP, PS, etc.). It facilitates the transfer of the optical security component 100 but it is intended to be eliminated after transfer.
- the support film 110 is in contact with a release layer 120, which allows the support film 110 to be removed after transfer.
- the security of the optical security component 100 is ensured in particular by a set of security layers 140, which give it a recognizable optical effect.
- the set of security layers 140 form an OVD type component for “Optical Variable Device” and particularly the DOVID type components for “Diffractive Optical Variable Image Device”, adapted to generate diffractive effects, in reflection or transmission , commonly called “holograms”.
- the set of security layers 140 comprises a first face and a second face, opposite the first face, and notably comprises:
- adhesion layer 141 also called adhesion primer, or adhesion primer
- one or more reflective layers for example a metal layer 143.
- metal layer 143 is meant a reflective layer which can be opaque metallic (in particular based on at least one of the metals or alloys among: Aluminum, Copper, Chrome) or transparent (in particular based on ZnS or of TiO2).
- the optical security component 100 also comprises a layer of protective varnish 130, which is placed on the first face of the set of security layers 140, and which is in contact with the detachment layer 120.
- the optical security component 100 also comprises a first layer of glue 150, continuous at least over the entire surface of the optical security component 100, transparent, arranged on the second face of the set of security layers 140, at least over the entire surface of the optical security component 100.
- a transfer step makes it possible to glue the optical security component 100, provided with the support film 110 and the detachment layer 120, thanks to the first layer of continuous glue layer 150 which comes into contact with a layer of polycarbonate and which is activated in a hot stamping step which ends with the peeling of the support film 110 thanks to the detachment layer 120.
- the first layer of glue 150 secures the optical security component 100 to the polycarbonate support 200.
- a lamination step is provided in which: at least a second layer of polycarbonate 210 is positioned on the assembly constituted by the layer 200 and the optical component 100 transferred,
- a pressing operation under temperature is then carried out, which makes it possible to fuse the two layers of polycarbonate 200, 210 together.
- An optical security component 100 according to the invention is intended to be transferred to a polycarbonate support 200. As explained previously, it is desirable to limit the risks of fraudulent delamination of the layers between them.
- the present invention proposes a different approach which makes it possible to detect any delamination of the layers between them, in this case by selective and controlled destruction of the hologram in the event of delamination of the latter from its polycarbonate support 200.
- a second layer of transparent glue 160 is provided, in contact with the first layer of glue 150, and intended to fix the set of security layers 140 during the transfer of the optical security component 100 to the substrate.
- the first layer of glue 150 is in contact with the metallization layer 143 before transfer and the second layer of glue 160 is printed on the first layer of glue 150.
- the second layer of glue 160 is printed on the metallization layer 143 before transfer, and that the first layer of glue 150 is coated on the second layer of glue 160, that is to say that the printed surface of the first layer of glue 150 is greater than that of the second layer of glue 160.
- the chemical composition of the second layer of glue 160 may be the same as that of the first layer of glue 150, provided that the luminescent pigments mentioned subsequently are different. In this case, there is no selective and controlled destruction but optical control by luminescence color.
- the chemical composition of the second layer of glue 160 is different from that of the first layer of glue 150, as explained below.
- the first glue layer 150 has a first bonding force on the polycarbonate substrate 200
- the second glue layer 160 has a second bonding force on the polycarbonate substrate 200, different from the first bonding force.
- the bonding force is described for example at https://www.3mfrance.fr/3M/fr_FR/solutions- adhesives-assemblage/formation-apprenticeship/les-forces-de-collage/
- the first bonding force on the polycarbonate substrate 200 is greater than the second bonding force on the polycarbonate substrate 200.
- the bonding force of the first layer of glue 150 on the second layer of glue 160 is greater than one predetermined threshold value; and for example greater than at least one of: the first bonding force of the first glue layer 150 on the polycarbonate substrate 200, and the second bonding force of the second glue layer 160 on the polycarbonate substrate 200
- the two superimposed layers of glue 150, 160 are torn off at the same time as it.
- the bonding force of the first layer of glue 150 on the second layer of glue 160 is less than a predetermined threshold value; and in this case less than at least one of: the first bonding force of the first layer of glue 150 on the polycarbonate substrate 200, and the second bonding force of the second layer of glue 160 on the substrate in polycarbonate 200.
- the first layer of glue 150 is torn off at the same time as it, and the second layer of glue 160 remains stuck to the substrate in polycarbonate 200.
- there is no controlled destruction because the rupture will take place between the first layer of glue 150 and the second layer of glue 160 and not between a layer of glue and the polycarbonate substrate 200 .
- the fragile zones A in this case Al, A2 and A3, depend on the position of the glue pads of the second glue layer 160 and the adhesion forces.
- the fragility can be located: either on the zone of fragility Al, at the interface between the second layer of glue 160 and the first layer of glue 150; either on the fragile zone A2, at the interface between the second layer of glue 160 and the polycarbonate substrate 200. Between two glue pads adjacent to the second layer of glue 160, generally to the right of them, the fragility is located on zone A3, at the interface between the hologram 14 and the second layer of polycarbonate 210.
- hologram 14 we mean all of the following layers, integral with each other: the protective varnish layer 130, all of the security layers 140 which includes the adhesion layer 141, the stamping varnish layer 142 and the metallization layer 143.
- the bonding force between the second layer of glue 160 and the polycarbonate support 200 is lower than the adhesion force between the hologram 14 and the second layer of polycarbonate 210, itself lower than the bonding force between the first layer of glue 150 and the polycarbonate support 200, itself lower than the bonding force between the hologram 14 and the first layer of glue 150;
- the adhesion force between the hologram 14 and the second layer of polycarbonate 210 is greater than the bonding force between the first layer of glue 150 and the second layer of glue 160;
- the adhesion force between the hologram 14 and the second layer of polycarbonate 210 is greater than the bonding force between the second layer of glue 160 and the polycarbonate support 200.
- the bonding force between the first layer of glue 150 and the polycarbonate support 200 is greater than or equal to the bonding force between the first layer of glue 150 and the hologram 14.
- these two bonding forces bonding are greater than the adhesion force between the hologram 14 and the second layer of polycarbonate 210.
- the glue of the first layer of glue 150 can be considered “strong” glue and is an glue based on polyester and/or acrylic copolymer and/or styrene-acrylic copolymer and/or an epoxy resin and/or a polyurethane. and/or ethylene vinyl acetate copolymer (EVA).
- a crosslinking agent can also be added.
- the families of crosslinking agents are following, taken alone or in combination, a carbodiimide, a melamine resin, an aziridine, an isocyanate.
- the glue of the second layer of glue 160 can be considered “weak” glue. It is, for example, an adhesive based on an acrylic copolymer and/or a styrene-acrylic copolymer and/or a polyester and/or an epoxy resin and/or a polyurethane and/or ethylene vinyl acetate copolymer (EVA). .
- the first layer of glue 150 can be in the form of a uniform layer, continuous in at least one direction of elongation, and typically covers the entire surface of the hologram.
- the first layer of glue 150 is in the form of a discontinuous layer, comprising a set of at least one first predetermined pattern.
- the second layer of glue 160 can be in the form of a continuous uniform layer in at least one direction of elongation, or, preferably, in discontinuous form, and in this case in the form of a set of at least one second predetermined pattern.
- the second pattern is smaller than the first pattern, and included in the first pattern when it is observed perpendicular to the plane of the optical security component 100.
- the second pattern matches the shape of the first pattern.
- the first layer of glue 150 and the second layer of glue 160 are not both uniform and continuous in two directions of elongation.
- At least one of the first glue layer 150 and the second glue layer 160 is discontinuous in at least one direction of elongation and represents a set of at least one predetermined pattern, so as to allow to selective destruction.
- each first pattern includes a plurality of second patterns.
- the first pattern represents a possibly distorted oval shape
- the second pattern represents the “Fail” characters in Figure 6 and polygons in Figure 7.
- the shape of the first pattern can be any.
- the surface ratio between the first pattern and the second pattern is between two predetermined values, so that the first pattern and the second pattern are both observable, advantageously with the naked eye.
- the second layer of glue 160 has a bonding force lower than the bonding force of the first layer of glue 150, it is advantageously provided that the surface ratio between the first pattern and the second pattern is at most '/z.
- the second layer of glue 160 is printed on the first layer of glue 150.
- the second layer of glue 160 is coplanar with the first layer of glue 150.
- the first layer of glue 150 comprises at least one recess whose shape is complementary to that of the pattern of the second layer of glue. glue 160, the pattern of the second layer of glue 160 being printed in said recess, for example as illustrated in Figure 9.
- the second layer of glue 160 is interposed with the first layer of glue 150.
- At least one of the first glue layer 150 and the second glue layer 160 comprises luminescent pigments, that is to say phosphorescent or, in this case, fluorescent.
- Luminescent pigments are pigments which emit in a determined emission spectral band when they are previously excited by photons in a first excitation spectral band, in particular UV.
- the emission spectral band is generally different from the excitation spectral band.
- only the first layer of glue 150 comprises luminescent pigments.
- only the second layer of glue 160 comprises luminescent pigments.
- the first layer of glue 150 and the second layer of glue 160 each comprise luminescent pigments.
- the luminescent pigments of the first layer of glue 150 and the luminescent pigments the second layer of glue 160 all emit in the same predetermined emission spectral band, but the luminescent pigments of the first layer of glue 150 emit in a first color, and the luminescent pigments of the second layer of glue 160 emit in a second color different from the first color. That is to say that the luminescent pigments of the first glue layer 150 emit in a first emission spectral band, and the luminescent pigments of the second glue layer 160 emit in a second emission spectral band, such that the first emission spectral band and the second emission spectral band are at least partially identical.
- the first layer of glue 150 comprises luminescent pigments which emit blue light when they are previously excited by UV light
- the second layer of glue 160 comprises luminescent pigments which emit yellow light when they are previously excited by the same UV light.
- the first pattern appears blue in color and the second pattern appears yellow.
- the first glue layer 150 and the second glue layer 160 also each comprise luminescent pigments, but which are excited in a respective spectral band.
- the first glue layer 150 comprises luminescent pigments which emit in a first emission spectral band when they are previously excited by photons of a first excitation spectral band
- the second glue layer 160 comprises luminescent pigments which emit in a second emission spectral band, possibly the same as the first emission spectral band, but when they are previously excited by photons of a second excitation spectral band, different from the first excitation spectral band.
- the luminescent pigments of the first glue layer 150 emit when they have been excited by UV-A photons
- the luminescent pigments of the second glue layer 160 emit when they have been excited by UV photons.
- -B or UV-C it is thus possible to check the optical security component 100, possibly on its polycarbonate support 200, by subjecting it to UV light.
- this type of control is non-destructive.
- At least one of the first pattern and the second pattern is invisible to the naked eye under natural light, thanks to transparent glues, but becomes visible to the naked eye when the luminescent pigments emit.
- At least one of the patterns among the first pattern and the second pattern does not have symmetry, which adds an additional level of security by making any attempt at fraudulent copying even more difficult.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Credit Cards Or The Like (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2211447A FR3141639B1 (fr) | 2022-11-03 | 2022-11-03 | Dispositif optique de sécurité |
| PCT/EP2023/079813 WO2024094521A1 (fr) | 2022-11-03 | 2023-10-25 | Dispositif optique de sécurité |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4611999A1 true EP4611999A1 (fr) | 2025-09-10 |
Family
ID=85221876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23798181.6A Pending EP4611999A1 (fr) | 2022-11-03 | 2023-10-25 | Dispositif optique de sécurité |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4611999A1 (fr) |
| FR (1) | FR3141639B1 (fr) |
| WO (1) | WO2024094521A1 (fr) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993005124A1 (fr) * | 1991-09-06 | 1993-03-18 | Bank Of Canada | Adhesif pour dispositif de securite a couche mince |
| WO1996002048A1 (fr) * | 1994-07-08 | 1996-01-25 | Minnesota Mining And Manufacturing Company | Pellicule multicouche transparente et son utilisation pour proteger des donnees contenues dans un document et comme etiquette inviolable |
| DE102008062149B3 (de) * | 2008-12-16 | 2010-04-29 | Ovd Kinegram Ag | Verfahren zur Herstellung eines Sicherheitselements sowie Transferfolie |
| DE102015121849A1 (de) * | 2015-12-15 | 2017-06-22 | Ovd Kinegram Ag | Verfahren zur Herstellung eines Sicherheitselements sowie Transferfolie |
| JP7044068B2 (ja) * | 2016-10-12 | 2022-03-30 | 凸版印刷株式会社 | 転写箔、セキュリティ積層体、および、セキュリティ積層体の製造方法 |
-
2022
- 2022-11-03 FR FR2211447A patent/FR3141639B1/fr active Active
-
2023
- 2023-10-25 WO PCT/EP2023/079813 patent/WO2024094521A1/fr not_active Ceased
- 2023-10-25 EP EP23798181.6A patent/EP4611999A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3141639B1 (fr) | 2024-09-20 |
| FR3141639A1 (fr) | 2024-05-10 |
| WO2024094521A1 (fr) | 2024-05-10 |
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