EP4145426A1 - Étiquette de sûreté - Google Patents

Étiquette de sûreté Download PDF

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Publication number
EP4145426A1
EP4145426A1 EP21194263.6A EP21194263A EP4145426A1 EP 4145426 A1 EP4145426 A1 EP 4145426A1 EP 21194263 A EP21194263 A EP 21194263A EP 4145426 A1 EP4145426 A1 EP 4145426A1
Authority
EP
European Patent Office
Prior art keywords
layer
laser
security label
writable
fracture
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
Application number
EP21194263.6A
Other languages
German (de)
English (en)
Inventor
Johann Hilburger
Markus Heimel
Stefanie Keber
Georg Aigner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hueck Folien GmbH
Original Assignee
Hueck Folien GmbH
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 GmbH filed Critical Hueck Folien GmbH
Priority to EP21194263.6A priority Critical patent/EP4145426A1/fr
Priority to PCT/EP2022/074142 priority patent/WO2023031239A1/fr
Publication of EP4145426A1 publication Critical patent/EP4145426A1/fr
Pending legal-status Critical Current

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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

  • Security labels for identifying goods are known per se and are used in the most varied of fields of technology. For example, components supplied in the automotive industry are provided with such security labels.
  • Corresponding layers can be "written on” by the action 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 from the US5766827A is known.
  • an opaque, optically contrasting layer can be arranged below the aluminum oxide layer.
  • a most desirable property of security labels is the so-called document authenticity, which includes in particular the property that manipulation or even removal of the security label is not possible without leaving traces.
  • so-called “void labels” are known from the prior art, which are used to indicate attempts to manipulate objects and packaging, cf EP 2603910 B1 or the EP 2603911 B1 .
  • void labels With these void labels, a layer structure with at least one separating lacquer layer ensures that a security feature that was previously invisible or in the affixed state appears on the label surface as soon as the void label is detached from the respective substrate.
  • the security feature it is mostly in the form of lettering, images, patterns or the like.
  • one or more further layers, in particular protective layers, are arranged above or in front of the at least one transparent protective layer as seen in the first direction.
  • the at least one transparent protective layer does not have to be arranged directly in front of the laser-writable layer, i.e. one or more further layers can 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 arranged directly behind the laser-writable layer, i.e. one or more further layers can 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 has been said above, the laser-writable layer, including any layers lying in between, is also 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 in security labels the latter is typically in the range of approx. 100% or even significantly more than 100%.
  • PET polyethylene terephthalate
  • a 50 ⁇ m thick polyethylene terephthalate (PET) film 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. These elongation at break values apply to the plastic film as such, ie considered alone - without the entire structure of the security label with the other 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).
  • PVC film polyvinyl chloride film
  • PU film polyurethane film
  • Said foils are sufficiently brittle per se. Additional embrittlement, for example through targeted UV radiation, is not necessary. In addition, there is usually no significant additional embrittlement of the plastic films used during the manufacturing process.
  • the contrast layer is designed as a fracture layer. In this way, extremely compact structures can be realized with a minimum number of layers, it being possible for the contrast layer to be arranged directly or not directly behind the laser-writable layer, seen in the first direction.
  • a particularly preferred embodiment of the security label according to the invention provides that at least one further layer is arranged between the laser-writable layer and the contrast layer, the at least one further layer comprising at least one partial release lacquer layer.
  • the at least one further layer can also comprise further layers in addition to the partial release lacquer layer, for example 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 peeled off arise in order to further increase the document authenticity.
  • the partial separating lacquer layer provides different adhesion between layers arranged in front of and behind the separating lacquer layer compared to the adhesion of these layers without an intermediate separating lacquer layer, in order to cause a detachment of certain shaped areas when the security label is removed or manipulated and to make the symbols mentioned 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 partial release lacquer layer includes.
  • the at least one further layer can also comprise further layers in addition to the partial release lacquer layer, e.g. 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) increase the authenticity of the document.
  • the at least one partial release lacquer layer is 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 characters.
  • the corresponding shape(s) will be used when peeling off the security label due to the local different detachment of the layers adjacent to the partial release coating layer visible.
  • the at least one protective layer comprises a layer of a UV transfer lacquer. This represents a particularly favorable solution in terms of process engineering for the production of the at least one protective layer.
  • a particularly transparent layer of plastic, particularly PET, or a plastic film, particularly PET film can first be provided, which is arranged immediately in front of the layer of UV transfer lacquer, seen in the first direction, and subsequently—typically already in front the application of the security label - is removed again (by peeling it off).
  • the at least one protective layer comprises a layer made 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, or is completely formed by this.
  • these layers include or consist of different plastic films.
  • a protective lacquer layer is applied as the "topmost" layer or as the first layer seen in the first direction, which layer can be arranged over the said at least one transparent protective layer.
  • This protective lacquer layer protects the surface of the Security labels from abrasion and can be designed in particular slightly matt. The latter reduces the reflection of the surface and can therefore prove to be advantageous if, for example, a barcode written in the laser-writable layer is to be read using a scanner.
  • the at least one protective layer comprises a layer of a 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 to be beneficial, for example, if the security label is first delivered to a customer with the layer of adhesion promoter as the top layer, who can then print a logo, for example, on the adhesion promoter layer and then apply the said, in particular matt, protective lacquer layer.
  • the at least one protective layer comprises at least one fracture layer.
  • the fracture layer is preferably arranged immediately 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 A preferred embodiment of the security label according to the invention provides that the contrast layer is arranged directly behind the laser-writable layer, seen in the first direction. In terms of contrast, this guarantees optimal readability of what is written in the laser-writable layer.
  • FIGS. 1 to 5 show schematic sectional views of embodiments of a security label 1 with several layers, which is a “laser-writable security label”, ie 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 an underside 5, which are arranged opposite one another and point away from one another. Seen 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.
  • a contrast layer 7 for example white, is arranged behind the layer 2 that can be written on by a laser, as seen in the first direction 6 , with the contrast layer 7 not having to follow the layer 2 that can be written on by a laser. If, as described above, 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 said track particularly easily visible optically.
  • the contrast layer 7 can be applied to a substrate 9 with a self-adhesive layer 15, the substrate 9 being formed, for example, by a product whose authenticity is to be guaranteed by means of the security label 1.
  • the security label 1 In order to ensure document authenticity, it is provided with the security label 1 according to the invention that at least one of the several layers is formed 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 layers lying in between , in the event of a 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, i.e. 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 provides different adhesion between layers arranged in front of and behind the separating lacquer layer 10 - i.e. in particular between the laser-writable layer 2 and the white acrylate film 16 or the laminating adhesive layer 11 - in comparison to the adhesion of these layers without an intermediate separating lacquer layer 10, in order to cause a detachment of certain shaped areas when removing or manipulating the security label 1 and to let the mentioned symbols 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 lettering exhibit.
  • 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 .
  • the self-adhesive layer 15 with which the security label 1 is applied or glued to the substrate 9 is arranged behind the contrast layer 7 .
  • 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 for the production of the at least one protective layer 3 in terms of process technology.
  • 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 lacquer 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. If 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. 1 shows a fourth embodiment of the security label 1 according to the invention, wherein the fracture 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 immediately behind this is the contrast layer 7 or fracture layer 8 formed by the white acrylate film 16. Accordingly, the laser-writable layer 2 is destroyed with great reliability if the fracture layer 8 breaks or is destroyed. Only the self-adhesive layer 15 with which the security label 1 is applied to the substrate 9 is arranged behind
  • 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 correspondingly destroyed in a highly reliable manner if the transparent acrylate film 17 breaks or is 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 is arranged directly behind the contrast layer 7 .

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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)
EP21194263.6A 2021-09-01 2021-09-01 Étiquette de sûreté Pending EP4145426A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21194263.6A EP4145426A1 (fr) 2021-09-01 2021-09-01 Étiquette de sûreté
PCT/EP2022/074142 WO2023031239A1 (fr) 2021-09-01 2022-08-31 Étiquette de sécurité

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
EP4145426A1 true EP4145426A1 (fr) 2023-03-08

Family

ID=77595392

Family Applications (1)

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

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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Publication number Publication date
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