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
  • G09F3/08—Fastening or securing by means not forming part of the material of the label itself
  • G09F3/10—Fastening or securing by means not forming part of the material of the label itself by an adhesive layer
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
  • B41M5/267—Marking of plastic artifacts, e.g. with laser
• • 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
  • Y10T428/14—Layer or component removable to expose adhesive
• • 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
  • Y10T428/14—Layer or component removable to expose adhesive
  • Y10T428/1405—Capsule or particulate matter containing [e.g., sphere, flake, microballoon, etc.]
• • 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
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
  • Y10T428/24851—Intermediate layer is discontinuous or differential
  • Y10T428/24868—Translucent outer layer
  • Y10T428/24876—Intermediate layer contains particulate material [e.g., pigment, etc.]
• • 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
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
  • Y10T428/24893—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
• • 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
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
  • Y10T428/24893—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
  • Y10T428/24901—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material including coloring matter
• • 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
  • Y10T428/2839—Web or sheet containing structurally defined element or component and having an adhesive outermost layer with release or antistick coating
• • 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
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]

Definitions

• DE G 81 30 861.2 describes a multi-layer label in which a different colored cover layer is removed by the laser beam and thus the color contrast to the next layer enables labels of high quality and legibility.
• This label is a type of engraving, which eliminates the possibility of manipulation as with traditional printing with colors and inks.
• the label film is so brittle due to the raw materials used and the manufacturing process that removal of the bonded labels from the adhesive substrates is only possible with destruction.
• the aim of the development was to develop the label material for the later labeling so that it can be used as authentic original material at any time can be identified with little effort and non-destructively. For those already subsequent identification is in principle also possible, however with unacceptable analytical effort and not non-destructive.
• JP 08/328474 describes a textile clothing label which is printed on the top side with a transparent, fluorescent color, the woven design and printed image being said to be approximately congruent.
• a similar superficial printing with UV-active, photochromic inks is described in WO 8801288; however, an additional protective layer against oxygen and water is necessary to protect the chemicals in this colored layer.
• FR 2734655 security marking for checks is achieved in that the printing under an only IR-permeable layer is invisible in the visible wavelength range, but is machine-readable / identifiable with special IR light.
• the ink ribbons described in JP 07/164 760 with fluorescent particles that can be excited by IR are transferred by heat using thermal transfer printers. Although the prints contain a concealed tamper-evident designation, the printing is applied superficially both with solvents, heat and mechanically removable or changeable.
• DE 4231800 describes labels which, for security against counterfeiting , leave indelible traces on the adhesive substrates by means of sublimation dyes or corrosive substances - however, the traces can only be identified after the label has been removed, which is often undesirable or impossible.
• EP 453131 describes for highly secured papers such as passports, shares, bank notes etc. that fluorescent, especially UV-fluorescent indicators are incorporated into an intermediate layer between two permanently bonded layers of paper, which are only detectable when light of suitable wavelength is transmitted through the laminate, but not through reflection in reflected light. This system is unsuitable for applications in which a transmission of light through the glued label is not possible, as well as for the completely opaque laser labels.
• DE 195 09 505 C discloses a multi-layer label, the backing layer of which contains an additive which shows a color change under laser irradiation, that is to say changes irreversibly.
• the object of the present invention was therefore to provide a largely "invisible” additional Install security level in the label stock, so that with as possible verification of originality is carried out quickly and non-destructively with little effort can be.
• This invention became an example of the laser-inscribable labels carried out, but is for the specialist for problems similar to printed labels, self-adhesive tapes, etc. available.
• Base layer an additive suitable for reversible optical identification, the Additive by means of electron beams, X-rays, in particular by visible light, especially recognizable by IR or UV rays, in particular made visible is, or a suitable for reversible magnetic or electrical labeling Additively incorporated.
• the top layer itself for e.g. high-gloss nameplates remains unchanged, the base layer is only partially attached to the laser engraving The labeling is exposed.
• white Base layer color pigments, color particles, colored fibers, etc. so these are attached to the engraved areas visible.
• the coloring particles can be fine Color pigments are or preferably visible particles of the order of magnitude from 0.1 - 5 mm.
• finely ground color pigments a slight change in color of the lettering created with the visible particles characteristic color mosaic.
• daylight fluorescent colors is without aids the "fingerprint” to recognize what is often undesirable.
• color pigments or particles used in the range of visible light do not absorb and are therefore normally invisible - only when the label is illuminated the color pigments are excited with a lamp of a suitable wavelength and shine characteristic.
• color pigments excited by IR radiation mainly UV-active systems.
• Phosphors that are emitted by electron beams, X-rays, etc. be excited as well thermochromic pigments that change color reversibly when the temperature changes - however
• thermochromic pigments that change color reversibly when the temperature changes - however
• Advantageous for permanent label applications is that these mostly sensitive phosphors are embedded in a polymer matrix and are additionally protected by the cover layer. Further measures against mechanical abrasion and protection against direct contact with oxygen and water unnecessary.
• RADGLO® pigments from Radiant Color N.V./Holland or Lumilux® CD pigments by Riedel-de-Haen.
• Inorganic phosphors are also suitable; as long afterglow Fabrics, especially those with light emission in the yellow area, have been found Metal sulfides and oxides, usually in combination with suitable activators, as cheap proved. These are, for example, under the trade name Lumilux® N or as Stability, luminosity and afterglow duration improved luminous pigments the trade name LumiNova® from Nemoto / Japan.
• Such labels, the phosphors in the base layer, especially those only after UV or IR excitation in the visible wavelength range, are suitable also for precise registration (printing, punching, application, etc.).
• the light emission of the base layer can be used for this: especially after Labeling and cutting the labels using a laser beam made from uncut punched material can be located in a downstream control unit at a defined point in the Labels the excitation and emission with suitable equipment as a tax stamp for further processing steps or for the production of the next label can be used.
• An alternative to the use of phosphors is the incorporation of substances into the Base layer that can be detected magnetically or electrically.
• magnetic field changes as with alarm labels for e.g. Garments are possible in principle, but for the fields of application (marking of machine and auto parts mainly from Metal) not predestined.
• there is a hidden security level in which Add base layer substances that lead to an electrical conductivity of the layer to lead.
• suitable measuring devices which are portable, easy to use and inexpensive are available, and suitable electrodes can be attached to the adhesive label the conductivity of the base layer can be determined directly.
• the electrodes are on two stopped different points A and B of the base layer and applied a voltage.
• a conductivity measurement not only from edge to edge of the labels, but between any points exposed by lasering: so here If a conductivity can be detected, the entire base layer must be continuous be three-dimensionally conductive, which is only possible in the context of the original manufacturing process can guarantee.
• Such a laser-inscribable label can be produced by adding electrically conductive substances to the formulation of the base layer; this can be in addition to the previous pigments or at least partially in the replacement of the existing pigments happen to the good processing properties to maintain the paint pastes.
• conductive additives are electrical conductive metallic, organic, polymeric and inorganic substances suitable, the use of metals is preferred. Especially for white or light base layers the inherent color of the conductive additive must be taken into account for the selection.
• Conductive carbon black is also suitable, but only for black or dark base layers.
• a minimum limit concentration should be set Additively ensure that sufficient particles are present in the base layer are to touch and to have contact with each other. When falling below this Limit concentration is a conductive one in the three-dimensional structure of the base layer No longer ensured from A to B.
• Metallic particles are therefore preferred used, fibers with a high length to cross-section ratio preferred because with lower concentrations there is a three-dimensional conductivity can be ensured than with spherical particles; besides, the falls Color change of the base layer with the fibers from less.
• Preferred metals are preferred for cost-benefit considerations copper, iron, aluminum and steel and their Alloys used, but also expensive, highly conductive metals such as silver, Suitable for gold.
• the fiber dimensions are 0.1 - 50 mm in length and cross sections with 1 - 100 microns, preferably metal fibers with a diameter of 2 - 20 microns at a Cross-sectional to length ratio of approx. 1: 100 to 1: 1000 are used. Fibers of this type are incorporated into the known formulation at 0.5-25%, preferably at 2-10% homogeneously incorporated and acc. DE G 81 30 861.2 coated and cured. To Adhesive coating and covering with release paper are available label material, which can be labeled with a laser beam.
• the lettering of the base layer becomes the top layer exposed - when a voltage is applied to two different ones via suitable electrode contacts
• Locations A and B of these logos are measured for conductivity is characteristic of the base layer and i.a. by amount and type of conductive Additive is determined. There is thus the possibility of customer-specific using defined recipes Manufacture label stock.
• the base layer of a two- or multi-layer label Modify to provide additional counterfeit protection in the label stock can also be used in a modified form for a single-layer label are, however, the advantages of the invention are not in part to the full extent Come wear.
• a patented two-layer laser label consists, for example, of a thin black cover layer and a thick white base layer.
• the basic formulation for the respective paint paste consists of 90% of a commercially available aliphatic polyurethane acrylate and 10% hexanediol acrylate.
• the black paste is made with soot, as is known, the white paste with titanium dioxide as a color pigment.
• Black paste 10% carbon black, viscosity approx. 15 dPas.
• the black paste is spread evenly with 13 g / m 2 onto a high-gloss, biaxially stretched polyester film of 50 ⁇ m and crosslinked with EB radiation [4 kGy]; after coating with the white paste on the black top layer with 100 g / m 2 , the complete crosslinking takes place with 80 kGy.
• Coating with a polyacrylate PSA of 25 g / m 2 and covering with a commercially available silicone paper result in the label material for further customer-specific uses.
• the white paste is used the long-afterglow pigment Luninova® G 300 M from Nemoto / Japan 20% incorporated.
• UV lamp achieved, but also by a strong, in the visible wavelength range emitting light source. In contrast to A, this light is not switched off the light source disappeared, but remains recognizable for minutes.

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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)
• Laminated Bodies (AREA)

Applications Claiming Priority (2)

Publications (3)

Family

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Family Applications (1)

Country Status (4)

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• 1997
  • 1997-10-24 DE DE1997146998 patent/DE19746998B4/de not_active Expired - Fee Related
• 1998
  • 1998-10-15 EP EP19980119458 patent/EP0911786B1/de not_active Expired - Lifetime
  • 1998-10-15 DE DE59805492T patent/DE59805492D1/de not_active Expired - Lifetime
  • 1998-10-15 ES ES98119458T patent/ES2182200T3/es not_active Expired - Lifetime
  • 1998-10-15 US US09/173,278 patent/US6309724B1/en not_active Expired - Fee Related

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