WO2023031239A1 - Étiquette de sécurité - Google Patents

Étiquette de sécurité Download PDF

Info

Publication number
WO2023031239A1
WO2023031239A1 PCT/EP2022/074142 EP2022074142W WO2023031239A1 WO 2023031239 A1 WO2023031239 A1 WO 2023031239A1 EP 2022074142 W EP2022074142 W EP 2022074142W WO 2023031239 A1 WO2023031239 A1 WO 2023031239A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
laser
writable
security label
label according
Prior art date
Application number
PCT/EP2022/074142
Other languages
German (de)
English (en)
Inventor
Johann Hilburger
Markus Heimel
Stefanie Keber
Georg Aigner
Original Assignee
Hueck Folien Gesellschaft M.B.H.
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 Hueck Folien Gesellschaft M.B.H. filed Critical Hueck Folien Gesellschaft M.B.H.
Publication of WO2023031239A1 publication Critical patent/WO2023031239A1/fr

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F2003/0208—Indicia
    • G09F2003/021—Indicia behind the front foil
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F2003/0208—Indicia
    • G09F2003/0213—Concealed data
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F2003/0257—Multilayer
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F2003/0276—Safety features, e.g. colour, prominent part, logo

Definitions

  • the laser-writable layer having a top and a bottom which are arranged opposite one another and point away from one another,
  • At least one transparent protective layer which is arranged in front of the laser-writable layer, seen in a first direction, in order to protect the laser-writable layer from external influences, the first direction pointing from the top to the bottom, and
  • contrast layer which is arranged behind the laser-writable layer, seen in the first direction.
  • Security labels for identifying goods are known per se and are used in the most varied of fields of technology. For example, components supplied to the automobile industry are provided with such security labels.
  • security labels known to provide a laser writable layer.
  • Black aluminum oxide is particularly suitable for such a layer, which has a black metallic color due to a substoichiometric oxygen content of the aluminum oxide.
  • laser-writable layer is to be understood as meaning such a black aluminum oxide layer (sometimes also referred to as “black metallization”), unless otherwise stated.
  • a particularly efficient production of foils that have such a black aluminum oxide layer is known from EP 1522606 B1.
  • Corresponding layers can be "written" by means of a laser, with the resulting energy input making the aluminum oxide layer transparent along the track of the laser beam.
  • the processes responsible for this, which take place due to the energy input, can include evaporation, oxidation, ablation and the like, such as e.g is known from US Pat.
  • a most desirable property of security labels is the so-called Document authenticity, which in particular includes the property that manipulation or even removal of the security label is not possible without leaving traces.
  • so-called "Void labels” are known, which are used to indicate tampering attempts on objects and packaging, cf. about EP 2603910 Bl or EP 2603911 Bl
  • a security feature that was previously invisible or in the affixed state appears as soon as the void label is detached from the respective substrate it is mostly about lettering, pictures, patterns or the like.
  • a security label with a laser-writable layer can be produced for such a void label.
  • too much energy is typically introduced into the existing layer system of the void label introduced so that the existing layer system of the void label no longer works reliably and document authenticity is not guaranteed.
  • the laser-writable layer having a top and a bottom which are arranged opposite one another and point away from one another,
  • At least one transparent protective layer which is arranged in front of the laser-writable layer seen in a first direction in order to protect the laser-writable layer from external influences, the first direction of the The top side faces the bottom side, and a contrast layer, which is arranged behind the laser-writable layer when viewed in the first direction, the invention provides that at least one of the several layers is designed as a fracture layer made of a brittle plastic film in order to prevent the at least one fracture layer from being destroyed as well as the laser-writable layer, and optionally one or more intermediate layers, in the event of manipulation or detachment of the security label stuck on a substrate.
  • one or more further layers, in particular protective layers, are arranged in front of the at least one transparent protective layer.
  • the at least one transparent protective layer does not have to be arranged directly in front of the laser-writable layer, d. H .
  • One or more further layers can also be arranged between the at least one transparent protective layer and the laser-writable layer.
  • the laser-writable layer appears dark, in particular black.
  • the contrast layer serves to generate an optical contrast of the, in particular transparent, inscription in the laser-writable layer.
  • the contrast layer can be white.
  • the contrast layer does not have to be located directly behind the laser-writable layer, i. H .
  • One or more further layers can also be arranged between the laser-writable layer and the contrast layer, for example a laminating adhesive layer.
  • the at least one fracture layer can theoretically be formed by the laser-writable layer and/or by the at least one transparent protective layer and/or by the contrast layer and/or by at least one further layer be. If the laser-writable layer forms the fracture layer, the aluminum oxide of the laser-writable layer can be applied to a plastic film of the laser-writable layer, which plastic film is brittle or has the desired brittle properties.
  • Said destruction of the at least one fracture layer and the laser-writable layer, and optionally one or more layers lying in between, includes breaking open or tearing open.
  • the fracture layer Due to its brittleness, the fracture layer is reliably destroyed when the security label is manipulated or removed. According to what was said above, the laser-writable layer incl. any intervening layers are destroyed when the fracture layer is destroyed. Accordingly, document authenticity is secured.
  • a characteristic value for the brittleness of a material is its elongation at break.
  • plastic films with thicknesses of 10 ⁇ m to 100 ⁇ m, in particular from 12 ⁇ m to 100 ⁇ m, as are usually used with security labels the latter is typically in the range of approx. 100% or even significantly more than 100%.
  • a 50 ⁇ m thick film of polyethylene terephthalate (PET) has an elongation at break of 190% in the machine direction and 120% in the transverse direction. If the elongation at break of the plastic film is more than 60%, in particular more than 80%, there is in any case insufficient brittleness.
  • the brittle plastic film of the at least one fracture layer has an elongation at break of less than 20%, preferably less than 15%, particularly preferably less than 10 %, having.
  • elongation at break values apply to the plastic film as such, ie considered alone - without the entire structure of the security label with the additional layers.
  • the brittle plastic film of the at least one fracture layer is an acrylate film or a polyvinyl chloride film (PVC film) or a polyurethane film (PU film). Said foils are sufficiently brittle per se. Additional embrittlement, for example through targeted UV irradiation, is not necessary. Furthermore, there is usually no significant additional embrittlement of the plastic films used during the production process.
  • the contrast layer is designed as a fracture layer.
  • a particularly preferred embodiment of the security label according to the invention provides for at least one additional layer to be arranged between the laser-writable layer and the contrast layer, with the at least one additional layer comprising at least one partial release lacquer layer.
  • the at least one additional layer can also include additional layers in addition to the partial release coating layer, e.g. B. a layer of laminating adhesive.
  • the partial separating lacquer layer is not completely continuous, so that certain symbols or characters can be seen when the security label is removed arise in order to further increase the document authenticity.
  • the partial release lacquer layer provides different adhesion between the layers arranged in front of and behind the release lacquer layer in comparison to the adhesion of these layers without an intermediate release lacquer layer, in order to avoid detachment of certain shaped areas when peeling off or removing. to cause the security label to be tampered with and to allow the symbols mentioned to become visible.
  • the security label in a particularly preferred embodiment of the security label according to the invention there is provision for at least one further layer to be arranged between the protective layer and the laser-writable layer, with the at least one further layer having at least one includes partial release coating layer.
  • the at least one further layer can also comprise further layers in addition to the partial release lacquer layer, e.g. B. a layer of laminating adhesive.
  • the partial separating lacquer layer is not completely continuous, so that certain symbols or characters appear when the security label is peeled off in order to (still) further increase the authenticity of the document.
  • the at least one partial release lacquer layer has the form of one or more letters, one or more characters, one or more symbols, one or more lines, one or has several guilloches, one or more numbers or one or more lettering.
  • the corresponding form(s) will appear when peeling off the security label due to the local different detachment of the to the partial
  • the at least one protective layer comprises a layer of UV transfer lacquer. This represents a solution that is particularly favorable in terms of process engineering for the production of the at least one protective layer.
  • an additional, in particular transparent, layer made of plastic, in particular PET, or a plastic film, in particular PET film, can be provided, which, seen in the first direction, is arranged immediately in front of the layer of UV transfer lacquer and is subsequently removed again (by peeling it off), typically before the security label is applied.
  • the at least one protective layer comprises a layer of a plastic film, in particular polyethylene terephthalate film (PET film).
  • PET film polyethylene terephthalate film
  • the at least one protective layer consists of at least one layer of plastic film, in particular PET film. is fully formed by this.
  • a protective lacquer layer is applied as the "top" or first layer seen in the first direction, which can be arranged over said at least one transparent protective layer.
  • This protective lacquer layer protects the surface of the Security labels from abrasion and can in particular be slightly matt. The latter reduces the reflection of the surface and can therefore prove to be advantageous if e.g. B. a barcode written in the laser-writable layer is to be read out by means of a scanner.
  • the at least one protective layer comprises a layer of protective lacquer or printing lacquer.
  • a layer of a printable adhesion promoter can be provided above the at least one transparent protective layer—and below the protective lacquer layer mentioned. This proves z. B. as favorable if the security label is first supplied with the layer of adhesion promoter as the top layer to a customer who then z on the adhesion promoter layer. B. can print a logo and then apply the mentioned, in particular matt, protective lacquer layer.
  • the at least one protective layer comprises at least one breakable layer.
  • the fracture layer is preferably arranged directly in front of the laser-writable layer, viewed in the first direction, so that the direct adhesion of the fracture layer to the laser-writable layer results in the greatest possible security for the destruction of the laser-writable layer if the fracture layer is destroyed.
  • the contrast layer does not have to be arranged directly behind the laser-writable layer, seen in the first direction. In order to ensure the greatest possible contrast, however, it is In a preferred embodiment of the security label according to the invention, the contrast layer is arranged directly behind the laser-writable layer, viewed in the first direction. In terms of contrast, this guarantees optimal readability of what is written in the laser-writable layer.
  • Fig. 1 shows a schematic sectional view of a first embodiment of a laser-writable security label according to the invention applied to a substrate
  • Fig. 2 shows a schematic sectional view of a second embodiment of the laser-writable security label according to the invention applied to a substrate
  • Fig. 3 shows a schematic sectional view of a third embodiment of the laser-writable security label according to the invention
  • Fig. 4 shows a schematic sectional view of a fourth embodiment of the laser-writable security label according to the invention applied to a substrate
  • Fig. 5 shows a schematic sectional view of a fifth embodiment of the laser-writable security label according to the invention applied to a substrate
  • Figures 1 to 5 show schematic sectional views of embodiments of a security label 1 with several layers, which is a "laser-writable security label", i.e. a security label 1 comprising a laser-writable layer 2 with black aluminum oxide.
  • the laser-writable layer 2 has an upper side 4 and a lower side 5, which are arranged opposite one another and point away from one another.Viewed in a first direction 6, the upper side 4 is arranged in front of the lower side or the first direction 6 points from the upper side 4 to the lower side 5.
  • a transparent protective layer 3 is arranged directly in front of the laser-writable layer 2 in order to protect the laser-writable layer 2 from external influences.
  • the white contrast layer 7 is arranged behind the laser-writable layer 2 as viewed in the first direction 6 , the contrast layer 7 not having to follow the laser-writable layer 2 directly. If, as described at the outset, the laser-writable layer 2 is written with a laser, the laser-writable layer 2 becomes transparent along the track of the laser beam, with the contrast layer 7 making the said track particularly clearly visible.
  • the contrast layer 7 can be adorned with a self-adhesive layer 15 on a substrate 9 appli, the substrate 9 z. B. is formed by a product whose authenticity is to be guaranteed by means of the security label 1 .
  • At least one of the several layers is designed as a rupture layer 8 from a brittle plastic film in order to prevent destruction of the at least one rupture layer 8 and the laser-writable layer 2 , and optionally one or more intervening layers, in the event of manipulation or detachment of the security label 1 glued to a substrate 9 .
  • the brittle plastic film of the at least one fracture layer 8 can have an elongation at break of less than 20%, preferably less than 15%, particularly preferably less than 10%.
  • PET polyethylene terephthalate
  • the fracture layer 8 breaks and destroys the one above it arranged layers, ie those layers which are arranged in front of the fracture layer 8 seen in the first direction 6, and thus in particular also the laser-writable layer 2.
  • the partial separating lacquer layer 10 is not completely continuous, so that certain symbols or characters also appear when the security label 1 is peeled off, in order to further increase the authenticity of the document.
  • the partial separating lacquer layer 10 imparts different adhesion between layers—d—arranged in front of and behind the separating lacquer layer 10 . H . in particular between the laser-writable layer 2 and the white acrylate film 16 or of the laminating adhesive layer 11 - in comparison to the adhesion of these layers without an intervening separating lacquer layer 10, in order to prevent certain shaped areas from detaching when peeling off or To cause manipulation of the security label 1 and to let the symbols mentioned become visible.
  • the partial release lacquer layer 10 can in particular be in the form of one or more letters, one or more characters, one or more symbols, one or more lines, one or more guilloches, one or more numbers or one or more letters have ft trains .
  • Fig. 2 shows a second embodiment of the security label 1 according to the invention with a particularly compact structure that manages with a minimum number of layers.
  • the transparent protective layer 3 is again provided as the first layer, which in this case is formed by a transparent acrylate film 17 and thus also forms the fracture layer 8 at the same time.
  • the laser-writable layer 2 is arranged directly behind the protective layer 3, so that if the fracture layer 8 is destroyed, the laser-writable layer 2 is also reliably destroyed.
  • the laser-writable layer 2 is in turn arranged directly on the contrast layer 7 , the contrast layer 7 being formed by a white lacquer layer 18 . Behind the contrast layer 7 is the self-adhesive layer 15 with which the security label 1 is applied or bonded to the substrate 9 . is glued on.
  • Fig. 3 shows a third embodiment of the security label 1 according to the invention, the breakable layer 8 in turn being formed by the contrasting layer 7 in that the contrasting layer 7 is formed as a white acrylate film 16 .
  • the transparent protective layer 3 includes not only the transparent PET film 13 but also a transparent UV transfer lacquer layer 19 , which represents a particularly favorable solution in terms of process engineering for the production of the at least one protective layer 3 .
  • the transparent PET film 13 arranged directly in front of the UV transfer lacquer layer 19 in the first direction 6 is usually removed again before the security label 1 is applied to the substrate 9 (by peeling it off), which can happen in different process steps.
  • the security label 1 is also not shown applied to the substrate 9 .
  • the overall result is the following sequence of layers arranged one behind the other: the transparent PET film 13; the UV transfer varnish layer 19; the laser writable layer 2; the (transparent) laminating adhesive layer 11; the white acrylate film 16; and the self-adhesive layer 15 with which the security label 1 can be applied to the substrate 9 .
  • the fracture layer 8 is destroyed, all of the layers arranged above the fracture layer 8—and thus in particular the laser-writable layer 2—of the security label 1 applied to the substrate 9 are also reliably destroyed.
  • Fig. 4 shows a fourth embodiment of the security label 1 according to the invention, where the breakable layer 8 is again formed by the contrast layer 7 and a particularly compact structure can be achieved with a minimum number of layers.
  • the transparent protective layer 3 is formed by a protective lacquer layer 20, which not only protects the surface of the security label 1 from abrasion, but can in particular be matt in order to prevent reflections and thus improve the readability, in particular by machine, of the layer in the laser-writable layer 2 coded information ( symbols , writing , etc. ) .
  • the laser-writable layer 2 Seen in the first direction 6, the laser-writable layer 2 is arranged directly behind the protective lacquer layer 20 and the contrast layer 7 or fracture layer 8 . Accordingly, the laser-writable layer 2 is destroyed in a highly reliable manner when the fracture layer 8 breaks or breaks. gets destroyed . Only the self-adhesive layer 15 with which the security label 1 is applied to the substrate 9 is arranged behind the fracture layer 8 .
  • Fig. 5 shows a fifth embodiment of the security label 1 according to the invention, in which two fracture layers 8 are provided in order to guarantee a particularly thorough destruction of the security label 1 in the event of manipulation or an attempt to remove it.
  • One of the two fracture layers 8 is formed by the transparent protective layer 3, which is designed as a transparent acrylate film 17.
  • the transparent protective layer 3 which is designed as a transparent acrylate film 17.
  • the layer 2 that can be written on by a laser is arranged directly behind the transparent acrylate film 17, which layer 2 is accordingly destroyed in a highly reliable manner if the transparent acrylate film 17 breaks or breaks. gets destroyed .
  • the laser-writable layer 2 is arranged with a laminating adhesive layer 11 on the contrast layer 7, which is formed by a white acrylate film 16 and so that the second fracture layer 8 is formed.
  • the self-adhesive layer 15 with which the security label 1 is applied to the substrate 9 .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

L'invention concerne une étiquette de sécurité (1) à couches multiples, comprenant : - une couche inscriptible au laser (2) à oxyde d'aluminium noir, ladite couche inscriptible au laser (2) ayant une face supérieure (4) et une face inférieure (5) qui sont disposées en regard l'une de l'autre et qui sont éloignées l'une à l'autre, - au moins une couche de protection transparente (3) qui est disposée devant la couche inscriptible au laser (2) lorsqu'elle est vue dans une première direction (6) afin de protéger la couche inscriptible au laser (2) des influences externes, la première direction (6) faisant face de la face supérieure (4) à la face inférieure (5), et - une couche de contraste (7) qui est disposée derrière la couche inscriptible au laser (2) lorsqu'elle est vue dans la première direction (6). Selon l'invention, au moins une couche parmi la pluralité de couches se présente sous forme de couche de rupture (8) qui est constituée d'un matériau plastique cassant afin de provoquer la destruction des couches de rupture (8) et de la couche inscriptible au laser (2), et éventuellement d'une ou plusieurs couches se trouvant entre la couche de rupture et la couche inscriptible au laser, lorsque l'étiquette de sécurité (1) collée sur une surface sous-jacente (9) est manipulée ou retirée.
PCT/EP2022/074142 2021-09-01 2022-08-31 Étiquette de sécurité WO2023031239A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP21194263.6 2021-09-01
EP21194263.6A EP4145426A1 (fr) 2021-09-01 2021-09-01 Étiquette de sûreté

Publications (1)

Publication Number Publication Date
WO2023031239A1 true WO2023031239A1 (fr) 2023-03-09

Family

ID=77595392

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/074142 WO2023031239A1 (fr) 2021-09-01 2022-08-31 Étiquette de sécurité

Country Status (2)

Country Link
EP (1) EP4145426A1 (fr)
WO (1) WO2023031239A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5766827A (en) 1995-03-16 1998-06-16 Minnesota Mining And Manufacturing Co. Process of imaging black metal thermally imageable transparency elements
US5770283A (en) * 1993-11-02 1998-06-23 Minnesota Mining And Manufacturing Company Tamper-indicating label
US6066437A (en) * 1996-10-11 2000-05-23 Schreiner Etiketten Und Selbstklebetechnik Gmbh & Co. Film which can be lettered using a laser beam
DE102005061124A1 (de) * 2005-12-19 2007-06-21 Tesa Ag Etikett mit erhöhter Fälschungssicherheit
EP1522606B1 (fr) 2003-10-10 2009-12-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procédé pour revêter d'un materiau en forme de bande avec oxyde noir d'aluminium
US20190147775A1 (en) * 2016-05-03 2019-05-16 Schreiner Group Gmbh & Co. Kg Film structure with protection against manipulation
EP2603911B1 (fr) 2010-08-13 2020-05-27 Hueck Folien Gesellschaft m.b.H. Étiquette ou bande adhésive de sécurité dotée d'un indicateur d'inviolabilité
EP2603910B1 (fr) 2010-08-13 2020-05-27 Hueck Folien Gesellschaft m.b.H. Étiquette ou bande adhésive de sécurité dotée d'un indicateur d'inviolabilité

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5770283A (en) * 1993-11-02 1998-06-23 Minnesota Mining And Manufacturing Company Tamper-indicating label
US5766827A (en) 1995-03-16 1998-06-16 Minnesota Mining And Manufacturing Co. Process of imaging black metal thermally imageable transparency elements
US6066437A (en) * 1996-10-11 2000-05-23 Schreiner Etiketten Und Selbstklebetechnik Gmbh & Co. Film which can be lettered using a laser beam
EP1522606B1 (fr) 2003-10-10 2009-12-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procédé pour revêter d'un materiau en forme de bande avec oxyde noir d'aluminium
DE102005061124A1 (de) * 2005-12-19 2007-06-21 Tesa Ag Etikett mit erhöhter Fälschungssicherheit
EP2603911B1 (fr) 2010-08-13 2020-05-27 Hueck Folien Gesellschaft m.b.H. Étiquette ou bande adhésive de sécurité dotée d'un indicateur d'inviolabilité
EP2603910B1 (fr) 2010-08-13 2020-05-27 Hueck Folien Gesellschaft m.b.H. Étiquette ou bande adhésive de sécurité dotée d'un indicateur d'inviolabilité
US20190147775A1 (en) * 2016-05-03 2019-05-16 Schreiner Group Gmbh & Co. Kg Film structure with protection against manipulation

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