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
  • G09F3/0292—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time tamper indicating labels
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
  • Y10T428/2843—Web or sheet containing structurally defined element or component and having an adhesive outermost layer including a primer layer
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
  • Y10T428/2848—Three or more layers

Definitions

• the invention relates to a security element, in particular a security label, which allows a proof of tampering.
• the present invention relates to security labels which have an optically active structure which is invisible in the intact state and which becomes recognizable only after a manipulation attempt.
• WO 01/93231 is a security label that has two microstructures, one of which is a diffractive structure, also recognizable in an unmanipulated state, and the other a release-controlling structure. In a manipulation attempt, at least parts of a reflective layer are peeled off, whereby a new visually recognizable information becomes visible.
• FR-A-2 867 590 discloses a method for protecting an object, wherein a protective film consisting of several layers is applied to at least part of the surface.
• the first layer consists of the source forming the finished pattern, the pattern being unreadable in this state.
• a so-called decoding layer is applied to this layer, which appears transparent and makes the pattern recognizable.
• the decoding layer is detached from the layer forming the pattern source, the pattern is no longer recognizable.
• EP-A-0 401 466 discloses a composite layer with a diffraction structure embedded between two layers of lacquer which has an optically clear stabilizing layer over the first lacquer layer.
• the stabilization layer serves to evenly distribute the heat when the layer composite is adhered.
• Stamps or labels can be punched out of the laminate, which are then applied to an object for securing purposes.
• WO 03/066344 A describes a security device that includes a first layer and a second layer.
• the first layer has hidden features
• the second layer has decoding optical elements and is adapted to be moved from one position to another on the first layer, the hidden features becoming recognizable only in one of the positions.
• Transfer applications are also described.
• the object of the present invention was to provide a security element, in particular a security label, which permits a proof of tampering, wherein the security feature is recognizable only during manipulation and can not be recognized in a non-manipulated state.
• the security element should have a smooth, non-sticky surface on both surfaces in a manipulated state.
• an adhesion promoter layer can be situated between the layers a) and b).
• Optically active structures are understood here to be, in particular, diffraction-optically active structures, such as holograms, surface reliefs, diffraction structures, diffraction gratings, kinegrams and the like.
• a reflective layer is understood to mean in particular a metallic layer or a metallic appearing layer.
• a layer with optical features is understood here in particular to be a colored layer or a layer having luminescent, in particular fluorescent or phosphorescent properties.
• the optical properties of the layer can also be visualized by visible dyes or pigments, luminescent dyes or pigments which fluoresce or phosphoresce in the visible, in the UV region or in the IR region, effect pigments, such as liquid crystals, pearlescent, bronzes and / or multilayer color change pigments and heat-sensitive inks or pigments. These can be used in all possible combinations.
• phosphorescent pigments can also be used alone or in combination with other dyes and / or pigments.
• carrier films are preferably flexible plastic films, for example of PI, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC , Fluoropolymers such as Teflon and the like in question.
• the carrier films preferably have a thickness of 5 to 700 ⁇ m, preferably 5 to 200 ⁇ m, particularly preferably 5 to 100 ⁇ m.
• coextruded or chemically or physically pretreated plastic films for example acrylate-coated plastic films, can also be used as the carrier substrate.
• metal foils for example Al, Cu, Sn, Ni, Fe or stainless steel foils having a thickness of 5-200 ⁇ m, preferably 10 to 80 ⁇ m, particularly preferably 20-50 ⁇ m, may also serve as the carrier substrate.
• the films can also be surface-treated, coated or laminated, for example, with plastics or painted.
• carrier substrates also paper or composites with paper, for example, composites with plastics with a grammage 20-500 g / m 2, preferably 40-200 g / m 2. be used.
• the carrier substrate may be coated with a bonding agent.
• a resist layer b is applied on the carrier substrate.
• This lacquer layer may be a radiation-curable lacquer layer or a thermoplastic lacquer layer.
• the radiation-curable lacquer may contain, for example, a radiation-curable lacquer system based on a polyester, an epoxy or polyurethane system which contains two or more different photoinitiators familiar to the person skilled in the art, which can initiate curing of the lacquer system to varying degrees at different wavelengths.
• a photoinitiator can be activated at a wavelength of 200 to 400 nm, the second photoinitiator then activatable at a wavelength of 370 to 600 nm.
• Sufficient difference should be maintained between the activation wavelengths of the two photoinitiators to prevent over-excitation of the second photoinitiator while the first photoinitiator is activated.
• the region in which the second photoinitiator is excited should be in the transmission wavelength range of the carrier substrate used.
• electron radiation can be used for the main curing (activation of the second photoinitiator) also electron radiation can be used.
• a water-thinnable varnish can also be used. Preference is given to polyester-based paint systems.
• the impression of the surface structure that is, the diffraction, diffraction or relief structure, for example, at controlled temperature by means of a die or using a stamping die in the radiation-curable lacquer layer, which was pre-cured by activation of the first photoinitiator to the gel point and at the time of molding in this stage is located.
• a water-dilutable radiation-curable lacquer is used, it is optionally possible to precede predrying, for example by means of IR radiators.
• thermoplastic varnish which is subsequently stabilized, consists of a base MMA or ethylcellulose or cycloolefin copolymer, modifiers being added to the base polymer to adjust the required thermoplastic properties or to adjust the subsequent stabilizability.
• modifiers include, for example, additives for adjusting the desired glass transition temperature, the range in which the paint is in the thermoplastic state, or modifiers for achieving permanent curing of the paint.
• the components are dissolved in a solvent, for example in aqueous solvents, water, alcohols, ethyl acetate, methyl ethyl ketone and the like or mixtures thereof.
• a solvent for example in aqueous solvents, water, alcohols, ethyl acetate, methyl ethyl ketone and the like or mixtures thereof.
• nitrocellulose for increasing the glass transition temperature is particularly advantageously added to a paint based on MMA.
• polyethylene waxes to a lacquer based on cycloolefin copolymers.
• crosslinkers are added to an ethylcellulose-based lacquer to adjust the hardenability.
• the concentration of the base polymer in the finished paint is 4-50%.
• thermoplastic paint can be carried out by means of a conventional thermal embossing process.
• the layer thickness of the applied paint can vary depending on the requirements of the end product and thickness of the substrate and is generally between 0.5 and 50 .mu.m, preferably between 2 and 10 .mu.m, more preferably between 2 and 5 microns.
• a further lacquer layer c which may have the same or a different composition as the first lacquer layer b), is then applied to this lacquer layer b).
• this lacquer layer c) have a second optically active structure.
• the optically active structure introduced into the first lacquer layer b) is extinguished, ie invisible.
• This reflective layer may consist of a metal, a metal compound, or an alloy.
• the metal layer layers of Al, Cu, Fe, Ag, Au, Cr, Ni, Zn and the like are suitable.
• suitable metal compounds are oxides or sulfides of metals, in particular TiO 2 , Cr oxides, ZnS, ITO, ATO, FTO, ZnO, Al 2 O 3 or silicon oxides.
• suitable Alloys are, for example, Cu-Al alloys, Cu-Zn alloys and the like.
• the layer can be applied over the entire surface or partially.
• a layer with optical features can be applied.
• This layer can be applied over the entire surface or partially.
• both a metallic and a layer having optical properties can be applied, wherein the layers are applied over the whole area or partially, register-accurate and / or register-accurate or at least partially overlapping.
• An adhesive coating preferably a self-adhesive coating, cold seal adhesive coating or heat seal adhesive coating, is applied to this structure.
• the security element is fixed on the object to be secured.
• the adhesion between the layers a and b must be greater than the adhesion between the layers b and c.
• the adhesion between the layers a and b is less than the adhesion between the layers b and c.
• the first lacquer layer b) is separated from the second lacquer layer c), the optically active structure introduced into the first lacquer layer b) is applied both in the first (peeled ) as well as in the second (on the object to be secured remaining) paint layer as a negative recognizable.
• the security element in the form of a transfer element applied to the object to be secured the authenticity can be detected by means of an aid, for example by means of the so-called Tesa test.
• an adhesive strip is applied to the security element and then removed.
• the optically active structure introduced into the first lacquer layer is recognizable as negative both on the adhesive strip and in the lacquer layer remaining on the object to be protected.
• the surface of the paint layer remaining on the article to be protected, as well as the surface of the removed part is smooth and dry and does not feel sticky (dry peel effect).
• the security element according to the invention can be applied as a security element on packaging materials or used in ready-made form as labels in any form (square, round, oval) or as adhesive tape for securing objects or packaging.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Theoretical Computer Science (AREA)
• Laminated Bodies (AREA)
• Credit Cards Or The Like (AREA)

Priority Applications (12)

Applications Claiming Priority (1)

Publications (2)

Family

ID=40910786

Family Applications (1)

Country Status (12)

Cited By (1)

Families Citing this family (3)

Family Cites Families (21)

• 2009
  • 2009-03-27 EP EP09004424.9A patent/EP2234091B1/de not_active Revoked
  • 2009-03-27 ES ES09004424.9T patent/ES2534234T3/es active Active
  • 2009-03-27 PL PL09004424T patent/PL2234091T3/pl unknown
  • 2009-03-27 SI SI200931206T patent/SI2234091T1/sl unknown
• 2010
  • 2010-02-04 UA UAA201110491A patent/UA105515C2/uk unknown
  • 2010-02-04 RU RU2011135077/12A patent/RU2533665C2/ru active
  • 2010-02-04 US US13/139,827 patent/US20120003469A1/en not_active Abandoned
  • 2010-02-04 WO PCT/EP2010/000697 patent/WO2010108567A1/de not_active Ceased
  • 2010-02-04 CN CN201080004123.2A patent/CN102272811B/zh active Active
  • 2010-02-04 JP JP2012501151A patent/JP5787260B2/ja not_active Expired - Fee Related
  • 2010-02-04 MX MX2011010147A patent/MX2011010147A/es active IP Right Grant
  • 2010-02-04 MY MYPI2011003511A patent/MY165994A/en unknown

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