EP0911786B1 - Laserlabels and their use - Google Patents
Laserlabels and their use Download PDFInfo
- Publication number
- EP0911786B1 EP0911786B1 EP19980119458 EP98119458A EP0911786B1 EP 0911786 B1 EP0911786 B1 EP 0911786B1 EP 19980119458 EP19980119458 EP 19980119458 EP 98119458 A EP98119458 A EP 98119458A EP 0911786 B1 EP0911786 B1 EP 0911786B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- additive
- laser
- label according
- polymer
- layer
- 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.)
- Expired - Lifetime
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Classifications
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- 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
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- 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
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- 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
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- 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.]
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- 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.]
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- 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
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- 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
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- 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
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- 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)
Description
Technische Etiketten werden in vielen Bereichen für hochwertige Anwendungen eingesetzt, so als Typenschilder für Fahrzeuge, Maschinen, elektrische und elektronische Geräte, als Steueretiketten für Prozeßabläufe sowie als Garantie- und Prüfplaketten. Vielfach beinhalten diese Anwendungen inhärent die Anforderung nach einem mehr oder minder ausgeprägten Maß an Fälschungssicherheit. Diese Fälschungssicherheit gilt vordergründig für den Zeitraum der Anbringung und die gesamte Nutzungsdauer auf dem zu kennzeichnenden Teil: eine Entfernung oder Manipulation soll nur unter Zerstörung oder sichtbarer, irreversibler Veränderung möglich sein. In besonders sensitiven Anwendungsfeldern muß eine Sicherheitsstufe auch für die Herstellung der Etiketten gelten: eine zu leichte Beschaffung und Kennzeichnung derartiger Etiketten sowie die Herstellung von Plagiaten würde Unbefugten die nicht authorisierte Verbreitung von Artikeln ermöglichen.Technical labels are used in many areas for high quality applications, as type plates for vehicles, machines, electrical and electronic devices, as control labels for process flows as well as guarantee and test badges. frequently these applications inherently involve the need for a more or less pronounced level of security against counterfeiting. This security against counterfeiting applies primarily for the period of attachment and the entire useful life on the part to be marked: removal or manipulation is only to be done with destruction or visible, irreversible change. In particularly sensitive fields of application a security level must also apply to the manufacture of the labels: too easy procurement and labeling of such labels and production Plagiarism would prevent unauthorized persons from distributing articles enable.
Für die rationelle und variable Herstellung hochwertiger Etiketten setzt sich speziell in technisch-industriellen Anwendungen die Laserkennzeichnung von geeignetem Basismaterial immer stärker durch. Mit DE G 81 30 861.2 wird ein mehrschichtiges Etikett beschrieben, bei dem eine andersfarbige Deckschicht durch den Laserstrahl entfernt wird und somit der farbliche Kontrast zur nächsten Schicht Beschriftungen hoher Güte und Lesbarkeit ermöglicht. Bei dieser Beschriftung handelt es sich um eine Art von Gravur, womit Manipulationsmöglichkeiten wie bei traditionellen Bedruckungen mit Farben und Tinten entfallen. Bei DE G 81 30 861.2 ist die Etikettenfolie durch die eingesetzten Rohstoffe und den Herstellungsprozeß derart spröde eingestellt, daß eine Entfernung der verklebten Etiketten von den Haftuntergründen nur unter Zerstörung möglich ist. For the rational and variable production of high-quality labels, especially in technical-industrial applications, the laser marking of suitable base material is becoming increasingly popular. 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. In DE G 81 30 861.2 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.
Eine zusätzliche Sicherheitsstufe wird in dem Einschichtlaseretikett nach DE G 94 21 868 beschrieben: zusätzlich zu den vorteilhaften Eigenschaften von DE G 81 30 861.2 wird hier die Beschriftung nicht durch Gravur in der Deckschicht, sondern durch eine Farbveränderung in der Kunststoffschicht selbst bewirkt, was spätere Manipulationen an den Beschriftungen weitestgehend verhindert.An additional security level is given in the single-layer laser label according to DE G 94 21 868: in addition to the advantageous properties of DE G 81 30 861.2 the inscription is not here by engraving in the cover layer, but by a Color change in the plastic layer itself causes subsequent manipulations the labels largely prevented.
Als potentielle Lücke in der Sicherheitskette stellt sich somit nur noch dar, daß derartige Ein- und Mehrschichtetiketten für Laserbeschriftung frei zugänglich sind - für entsprechend hochwertige Güter könnte somit die Beschaffung der Etiketten und Beschriftung selbst mit kostspieligen Laseraggregaten als möglich und lohnend anzusehen sein.The only potential gap in the security chain is that such Single and multilayer labels for laser marking are freely accessible - for accordingly High quality goods could thus be sourced from the labels and lettering to be regarded as possible and worthwhile even with expensive laser units.
Um hier Abhilfe zu schaffen, war es Ziel der Entwicklung, das Etikettenvormaterial für die spätere Beschriftung so auszugestalten, daß es jederzeit als authentisches Originalmaterial mit geringem Aufwand sowie zerstörungsfrei zu identifizieren ist. Für die bereits benannten Laseretiketten ist eine nachträgliche Identifizierung zwar prinzipiell auch möglich, jedoch mit unakzeptablem analytischem Aufwand und nicht zerstörungsfrei.In order to remedy this, 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.
Bekannt für besonders sicherheitsrelevante Güter wie Geldscheine, Schecks, Scheckund Personalidentifizierungskarten u.ä. sind diverse Verfahren, um Fälschungssicherheit zu gewährleisten. Neben Wasserzeichen, Bedruckung mit filigranen Mustern, Aufbringen von Hologrammen werden vereinzelt auch "unsichtbare" Kennzeichnungen genutzt.Known for particularly security-related goods such as banknotes, checks, checks and Personal identification cards etc. are various procedures to prevent counterfeiting to ensure. In addition to watermarks, printing with filigree patterns, application Holograms also occasionally use "invisible" markings.
In JP 08/328474 wird ein textiles Kleidungsetikett beschrieben, welches oberseitig mit einer transparenten, fluoreszierender Farbe bedruckt wird, wobei gewebtes Design und Druckbild annähernd deckungsgleich sein sollen. Eine ähnliche oberflächliche Bedrukkung mit UV-aktiven, photochromatischen Farben wird in WO 8801288 beschrieben; zum Schutz der Chemikalien dieser Farbschicht ist jedoch eine zusätzliche Schutzschicht gegen Sauerstoff und Wasser notwendig. 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.
In FR 2734655 wird eine Sicherheitskennzeichnung bei Schecks dadurch erreicht, daß partiell die Bedruckung unter einer nur IR-durchlässigen Schicht unsichtbar im sichtbaren Wellenlängenbereich ist, jedoch mit speziellem IR-Licht maschinenlesbar/-identifizierbar ist.In 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.
In EP 727316 wird eine verdeckte Fälschungssicherheit dadurch erreicht, daß in einer Extraschicht speziell auf Papier zwei reaktive Komponenten vorhanden sind, die unter Druck eine Farbreaktion ergeben - diese ist jedoch irreversibel.In EP 727316 , hidden protection against forgery is achieved in that two reactive components are present in an extra layer , especially on paper, which give rise to a color reaction under pressure - this is, however, irreversible.
Die Verwendung von elektrisch-leitfähigen bzw. magnetischen Farben zur Bedruckung auf der Oberfläche werden in JP 08/054825 und CN 1088239 beschrieben. Derartige Systeme sind für Etikettenanwendungen auf komplexen Metallteilen wie z.B. Fahrzeugund Maschinenteilen nur stark eingeschränkt einsatzfähig.The use of electrically conductive or magnetic inks for printing on the surface are described in JP 08/054825 and CN 1088239 . Such systems can only be used to a very limited extent for label applications on complex metal parts such as, for example, vehicle and machine parts.
Die in JP 07/164 760 beschriebenen Farbbänder mit fluoreszierenden Partikeln, die IRanregbar sind, werden mit Thermotransferdruckern durch Hitze übertragen. Die Drucke beinhalten zwar eine verdeckte Originalitätskennung, die Bedruckung ist jedoch oberflächlich aufgebracht sowohl mit Lösemitteln, Wärme als auch mechanisch entfern- oder veränderbar.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.
In DE 4231800 werden Etiketten beschrieben, die zur Fälschungssicherheit unentfernbare Spuren mittels Sublimationsfarben oder korrosiven Substanzen auf den Haftuntergründen hinterlassen - zu identifizieren sind die Spuren jedoch erst nach Entfernung des Etiketts, was vielfach nicht wünschenswert oder unmöglich ist. 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.
In EP 453131 wird für hochgesicherte Papiere wie Pässe, Aktien, Geldscheine etc. beschrieben, daß in eine Zwischenschicht zwischen zwei permanent verklebten Lagen Papier mit dem Kaschierkleber fluoreszierende, speziell UV-fluoreszierende Indikatoren inkorporiert werden, die nur detektierbar sind bei Transmission von Licht geeigneter Wellenlänge durch das Laminat, nicht jedoch durch Reflektion in Auflicht. Dieses System ist für Anwendungen, bei denen eine Transmission von Licht durch das verklebte Etikett nicht möglich ist, sowie für die völlig lichtundurchlässigen Laseretiketten ungeeignet. 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.
In der DE 195 09 505 C wird ein mehrschichtiges Etikett offenbart, dessen Trägerschicht ein Additiv enthält, das unter Laser-Bestrahlung einen Farbumschlag zeigt, also sich dabei irreversibel verändert. 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.
Alle diese Methoden werden oberflächlich aufgebracht bzw. sind oberflächlich wirksam und somit nicht oder nur stark eingeschränkt für die bekannten Laseretiketten nutzbar, da hier die für z.B. Typenschildanwendungen optisch hochwertige und extrem widerstandsfähige Oberfläche verändert und verschlechtert würde. Besonders störend würde eine derartige Modifikation bei den als technischen Standard für Typenschilder anzusehenden Zweischicht-Etiketten mit hochglänzender schwarzer Deckschicht und weißer Basisschicht auffallen. Außerdem beinhalten die nach Stand der Technik bekannten nachträglich oberflächlich aufgebrachten Fälschungssicherheiten das Potential, mechanisch oder unter Anwendung von Wärme, Chemikalien etc. Manipulationen durchzuführen.All of these methods are applied superficially or are superficially effective and therefore not or only to a very limited extent for the known laser labels, because here for e.g. Nameplate applications optically high quality and extremely resistant Surface would change and deteriorate. Would be particularly annoying such a modification in the as a technical standard for type plates viewable two-layer labels with high-gloss black top layer and white base layer. Also include those known in the art Subsequent superficial counterfeit security, the potential, mechanical or manipulations using heat, chemicals, etc.
Aufgabe der vorliegenden Erfindung war es somit, eine weitgehend "unsichtbare" zusätzliche Sicherheitsstufe in das Etikettenvormaterial einzubauen, so daß mit möglichst geringem Aufwand schnell und zerstörungsfrei der Nachweis der Originalität geführt werden kann. Diese Erfindung wurde beispielhaft für die laserbeschriftbaren Etiketten durchgeführt, ist aber für den Fachmann ohne weiteres für ähnliche Problemfälle wie bedruckte Etiketten, Selbstklebebänder u.ä. nutzbar.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.
Gelöst wird diese Aufgabe durch ein Laseretikett, wie dies im einzelnen in den Ansprüchen näher gekennzeichnet ist.This task is solved by a laser label, as detailed in the claims is characterized in more detail.
Als sowohl verfahrenstechnisch günstige als auch preiswerte Problemlösungen ergibt sich die Möglichkeit, die sich gegenüber dem Stand der Technik dadurch abhebt, daß weder die hochwertige Oberflächenbeschaffenheit der Deckschicht noch die Deckschicht selber verändert wird; geringfügige Eingriffe finden nur in der Basisschicht statt. Somit werden weder der optische Gesamteindruck noch die für mechanische, chemische und physikalische Widerstandsfähigkeit des Etikettes maßgebliche Deckschicht verändert. Desweitern läßt sich auf einfache Art und Weise eine kundenspezifische Markierung herstellen, was die unbefugte Beschaffung und Verwendung von Etiketten zusätzlich erschwert.As both technically favorable and inexpensive solutions to problems the possibility that stands out from the prior art in that neither the high quality surface quality of the top layer nor the top layer itself is changed; minor interventions only take place in the base layer. Consequently neither the overall optical impression nor that for mechanical, chemical and physical resistance of the label changed the top layer. Furthermore, a customer-specific marking can be easily created manufacture what the unauthorized procurement and use of labels in addition difficult.
Bei den Zwei- und Mehrschichtetiketten wird somit in die für die Schrift maßgebliche Basisschicht ein zur reversiblen optischen Kennzeichnung geeignetes Additiv, wobei das Additiv mittels Elektronenstrahlen, Röntgenstrahlen, insbesondere durch sichtbares Licht, ganz besonders durch IR- oder UV-Strahlen erkennbar, insbesondere sichtbar gemacht wird, oder ein zur reversiblen magnetischen oder elektrischen Kennzeichnung geeignetes Additiv eingearbeitet. Die Deckschicht selber für die z.B. hochglänzenden Typenschilder bleibt somit unverändert, erst bei der Lasergravur wird die Basisschicht partiell an den Stellen der Beschriftung freigelegt. Befinden sich in der hier beispielsweise weißen Basisschicht Farbpigmente, Farbpartikel, farbige Fasern u.ä., so werden diese an den gravierten Stellen sichtbar. Werden der Rezeptur der Basisschicht unterschiedliche Partikel (verschieden in Farbe, Form und/oder Größe) in definierten Verhältnissen zugesetzt und homogen verteilt, so kann eine derartige Verteilung in der Etikettenbasisschicht als "Fingerabdruck" dienen, der kundenspezifisch hergestellt und vertrieben werden kann. Bei den farbgebenden Partikeln kann es sich um feine Farbpigmente handeln oder aber auch bevorzugt um sichtbare Partikel in der Größenordnung von 0,1 - 5 mm. Bei Verwendung feingemahlener Farbpigmente wird eine leichte Farbtonveränderung der Schriftzüge erzeugt, mit den sichtbaren Partikeln ein charakteristisches Farbmosaik. Bei Einsatz von Tageslichtleuchtfarben ist ohne Hilfsmittel der "Fingerabdruck" zu erkennen, was häufig unerwünscht ist. Bevorzugt werden deshalb Farbpigmente oder Partikel eingesetzt, die im Bereich des sichtbaren Lichtes nicht absorbieren und somit im Normalfall unsichtbar sind - erst bei Beleuchtung des Etikettes mit einer Lampe geeigneter Wellenlänge werden die Farbpigmente angeregt und leuchten charakteristisch. Neben durch IR-Strahlung angeregten Farbpigmenten kommen hauptsächlich UV-aktive Systeme zum Einsatz. Prinzipiell geeignet sind auch Leuchtstoffe, die durch Elektronenstrahlen, Röntgenstrahlen u.ä. angeregt werden sowie thermochrome Pigmente, die sich bei Temperaturänderung reversibel umfärben - jedoch ist in diesen Fällen die Durchführung der Identifizierung am verklebten Etikett in Praxis umständlich und aufwendiger als die Sichtbarmachung mittels Licht geeigneter Wellenlänge. Bei der Auswahl der Farbpigmente ist darauf zu achten, daß sie für den Herstellprozeß der Etiketten (Folienherstellung, Kleberbeschichtung) ausreichend stabil sind und sich nicht irreversibel bei den Prozeßbedingungen (ggf. thermische Trocknung, Elektronenstrahl- oder UV-Härtung, u.ä.) verändern. Vorteilhaft für Daueranwendungen der Etiketten ist, daß diese meist empfindlichen Leuchtstoffe in einer Polymermatrix eingebettet und durch die Deckschicht zusätzlich geschützt sind. Weitergehende Maßnahmen gegen mechanischen Abrieb sowie Schutz vor direkten Sauerstoff- und Wasserkontakt sind nicht notwendig.In the case of two-layer and multi-layer labels, the one that is decisive for the font is thus 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. Are in the example here white Base layer color pigments, color particles, colored fibers, etc., so these are attached to the engraved areas visible. Become the recipe of the base layer different particles (different in color, shape and / or size) in defined Such relationships can be added and distributed homogeneously serve in the label base layer as a "fingerprint" that is custom made and can be distributed. The coloring particles can be fine Color pigments are or preferably visible particles of the order of magnitude from 0.1 - 5 mm. When using finely ground color pigments, a slight change in color of the lettering created with the visible particles characteristic color mosaic. When using daylight fluorescent colors is without aids the "fingerprint" to recognize what is often undesirable. To be favoured therefore 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. In addition to color pigments excited by IR radiation mainly UV-active systems. In principle, are also suitable 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 In these cases, it is practical to carry out identification on the glued label cumbersome and more complex than visualization using light of a suitable wavelength. When selecting the color pigments, care must be taken that they are used in the manufacturing process the labels (film production, adhesive coating) are sufficiently stable and do not become irreversible in the process conditions (possibly thermal drying, electron beam or UV curing, etc.) change. 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.
Für die erfindungsgemäße Anwendung können unterschiedliche Farbpigmente und -stoffe zum Einsatz kommen. Am weitesten verbreitet sind langnachleuchtende (phosphorizierende) oder fluoreszierende Pigmente, die nur oder überwiegend durch UV-Strahlung angeregt werden und im sichtbaren Bereich des Spektrums emittieren (als Übersicht s. z.B. Ullmanns Enzyklopädie der technischen Chemie, 4.Auflage, 1979, Verlag Chemie). Bekannt sind aber auch IR-aktive Leuchtpigmente. Beispiele für Systeme mit UV-Fluoreszenz sind Xanthene, Cumarine, Naphthalimide usw., die teilweise unter dem Oberbegriff 'organische Leuchtstoffe' oder 'optische Aufheller' in der Literatur geführt werden. Die Zugabe von einigen Prozenten der betreffenden Leuchtstoffe ist ausreichend, wobei besonders die Einbindung in eine feste Polymermatrix günstig ist in Bezug auf Leuchtkraft und Stabilität. Eingesetzt werden können beispielsweise Rezepturen mit RADGLO®-Pigmenten der Fa. Radiant Color N.V./Holland oder Lumilux® CD-Pigmente von Fa. Riedel-de-Haen. Auch anorganische Leuchtstoffe sind geeignet; als langnachleuchtende Stoffe, besonders mit Emission von Licht im gelben Bereich, haben sich Metallsulfide und -oxide, meist in Verbindung mit geeigneten Aktivatoren, als günstig erwiesen. Diese sind beispielsweise unter dem Handelsnamen Lumilux® N oder als bezüglich Stabiltät, Leuchtkraft und Nachleuchtdauer verbesserte Leuchtpigmente unter dem Handelsnamen LumiNova® von Fa. Nemoto/Japan erhältlich.For the application according to the invention, different color pigments and substances are used. Long afterglow are the most common (phosphorescent) or fluorescent pigments that are only or predominantly by UV radiation are excited and emit in the visible region of the spectrum (as Overview see e.g. Ullmann's Encyclopedia of Technical Chemistry, 4th edition, 1979, publisher Chemistry). However, IR-active luminescent pigments are also known. Examples of systems with UV fluorescence are xanthenes, coumarins, naphthalimides etc., some of which are below the generic term 'organic phosphors' or 'optical brighteners' in the literature become. The addition of a few percent of the phosphors in question is sufficient the integration into a solid polymer matrix is particularly favorable in relation on luminosity and stability. For example, recipes can be used with 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.
Diese exemplarisch aufgeführten Farbstoffe/-pigmente werden in die Rezeptur der Basisschicht in Mengen von 0,1 - 50 %, bevorzugt mit 1-25% eingearbeitet und beschichtet. Nach der abschließenden Kleberbeschichtung der Basisschicht und ggf. Eindeckung mit Trennpapier oder Trennfolie liegt das Etikettenvormaterial für die kundenspezifische Nutzung vor. Nach Stanzen/Laserschneiden der gewünschten Etikettengeometrien sowie der abschließenden Beschriftung mittels Laserstrahl mit Schriftzügen, Barcodes, Logos etc. liegt das Etikett in seiner Endform vor. Bei Inkorporation von z.B. langnachleuchtenden Pigmenten in die Basisschicht weist das Etikett nach entsprechender Anregung der Leuchtpigmente ein charakteristisches Nachleuchten im Bereich der Laserbeschriftung und an den Rändern auf, was eine leichte und schnelle Identifizierung als Originaletikett erlaubt. Außer der speziellen Lichtquelle und ggf. einem Sichtschutz gegen störendes Umgebungslicht ist kein weiteres aufwendiges Equipment notwenig - nach der Prüfung verbleibt das Etikett unverändert zurück.These dyes / pigments listed as examples are included in the formulation of the base layer in amounts of 0.1-50%, preferably incorporated and coated with 1-25%. After the final adhesive coating of the base layer and, if necessary, covering with Release paper or release film is the label material for customer-specific use in front. After punching / laser cutting the desired label geometries as well the final inscription using a laser beam with lettering, barcodes, logos etc. the label is in its final form. When incorporating e.g. afterglow After appropriate stimulation, the label assigns pigments to the base layer Luminous pigments a characteristic afterglow in the area of laser marking and on the edges on what an easy and quick identification as an original label allowed. In addition to the special light source and, if necessary, a privacy screen against disturbing Ambient light does not require any additional complex equipment - after the test the label remains unchanged.
Derartige Etiketten, die in der Basisschicht Leuchtstoffe, speziell die nur nach UV- oder IR-Anregung im sichtbaren Wellenlängenbereich emittierenden, enthalten, eignen sich auch für eine passergenaue Fertigung (Bedrucken, Stanzen, Applizieren etc.). Anstelle von gesondert aufzubringende Druck- oder Steuermarkierungen kann bei der Verarbeitung die Lichtemission der Basisschicht dafür genutzt werden: insbesondere nach dem Beschriften und Schneiden der Etiketten mittels Laserstrahl aus ungestanztem Rollenmaterial kann in einer nachgeschalteten Steuereinheit an einer definierten Stelle des Etiketts die Anregung und Emission mit geeignetem Equipment als Steuermarke für weitere Verarbeitungsschritte bzw. für die Herstellung des nächsten Etiketts genutzt werden.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.). Instead of of separately applied pressure or control marks can be used during processing 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.
Eine Alternative zur Verwendung von Leuchtstoffen ist der Einbau von Substanzen in die Basisschicht, die sich magnetisch oder elektrisch detektieren lassen. Magnetfeldänderungen wie bei Alarmetiketten für z.B. Kleidungsstücke sind prinzipiell möglich, jedoch für die Anwendungsfelder (Kennzeichnung von Maschinen- und Autoteilen überwiegend aus Metall) nicht prädestiniert. Dagegen bietet sich als verdeckte Sicherheitsstufe an, in die Basisschicht Substanzen zuzugeben, die zu einer elektrischen Leitfähigkeit der Schicht führen. Mit geeigneten Meßgeräten, welche transportabel, leicht zu bedienen und preisgünstig zu beschaffen sind, und geeigneten Elektroden kann an dem verklebten Etikett direkt die Leitfähigkeit der Basisschicht ermittelt werden. Die Elektroden werden an zwei unterschiedliche Punkte A und B der Basisschicht angehalten und eine Spannung angelegt. Bei Vorhandensein einer durchgängigen elektrischen Leitfähigkeit zwischen A und B kann ein Stromfluß gemessen werden, der je nach Art und Menge des verwendeten Additivs einen charakteristischen Wert aufweisen kann. Da selbst bei Verwendung des Etikettes direkt auf Metallen die Basischicht durch die elektrisch isolierende Klebemassenschicht von dem leitfähigem Metall getrennt ist, sind keine fehlerhaften Messungen zu befürchten.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. In contrast, there is a hidden security level, in which Add base layer substances that lead to an electrical conductivity of the layer to lead. With 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. If there is a continuous electrical conductivity between A and B a current flow can be measured, depending on the type and amount of the used Additive can have a characteristic value. Because even when using the Labels directly on metals the base layer through the electrically insulating adhesive layer separated from the conductive metal are not erroneous measurements to fear.
Eine Fälschung durch nachträgliche Manipulation wird besonders dadurch ausgeschlossen, daß die Leitfähigkeitsmessung nicht nur von Rand zu Rand der Etiketten, sondern zwischen beliebigen, durch Belaserung freigelegte Punkten erfolgen kann: damit hier eine Leitfähigkeit detektiert werden kann, muß die komplette Basisschicht durchgängig dreidimensional leitfähig sein, was sich nur im Rahmen des ursprünglichen Herstellprozeßes gewährleisten läßt. Ein derartiges laserbeschriftbares Etikett läßt sich herstellen, indem in die Rezeptur der Basisschicht elektrisch leitfähige Substanzen zugegeben werden; dies kann zusätzlich zu den bisherigen Pigmenten oder aber auch zumindest teilweise im Ersatz der vorhandenen Pigmente geschehen, um die guten Verarbeitungseigenschaften der Lackpasten beizubehalten. Als leitfähige Additive sind prinzipiell elektrisch leitfähige metallische, organische, polymere und anorganische Substanzen geeignet, wobei die Verwendung von Metallen bevorzugt ist. Speziell für weiße oder helle Basisschichten ist für die Auswahl die Eigenfarbe des leitfähigen Additvs zu berücksichtigen. Leitfähiger Ruß ist ebenfalls geeignet, jedoch nur für schwarze bzw. dunkle Basisschichten.Counterfeiting through subsequent manipulation is particularly ruled out if that the 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. In principle, 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.
Um eine gute Leitfähigkeit zu gewährleisten, sollte eine minimale Grenzkonzentration an Additiv sichergestellt sein, so daß ausreichend Partikel in der Basisschicht vorhanden sind, um sich zu berühren und Kontakt miteinander zu haben. Bei Unterschreitung dieser Grenzkonzentration ist in dem dreidimensionalen Gefüge der Basisschicht ein leitfähiger Weg von A nach B nicht mehr sichergestellt. Bevorzugt werden deshalb metallische Partikel eingesetzt, wobei Fasern mit einem hohen Längen- zu Querschnittsverhältnis bevorzugt werden, da hierbei mit geringeren Konzentrationen eine dreidimensionale Leitfähigkeit sichergestellt werden kann als mit sphärischen Partikeln; außerdem fällt die Farbveränderung der Basisschicht mit den Fasern geringer aus. Als Metalle werden bevorzugt aus Kosten-Nutzen-Erwägungen Kupfer, Eisen, Aluminium und Stahl sowie deren Legierungen eingesetzt, jedoch sind auch teure, hochleitfähige Metalle wie Silber, Gold geeignet. Die Faserdimensionen sind 0,1 - 50 mm Länge und Querschnitte mit 1 - 100 µm, wobei bevorzugt Metallfasern mit einem Durchmesser von 2 - 20 µm bei einem Querschnitts- zu Längenverhältnis von ca 1 : 100 bis 1 : 1000 zum Einsatz kommen. Derartige Fasern werden mit 0,5 - 25 %, bevorzugt mit 2 - 10 % in die bekannte Rezeptur homogen eingearbeitet und gem. DE G 81 30 861.2 beschichtet und ausgehärtet. Nach Kleberbeschichtung und Eindeckung mit Trennpapier steht Etikettenmaterial zur Verfügung, welches sich mittels Laserstrahl beschriften läßt. Durch das Entfemen der oberen Deckschicht werden im Bereich der Laserbeschriftung die Schriftzüge der Basisschicht freigelegt - bei Anlegen einer Spannung über geeignete Elektrodenkontakte an zwei unterschiedlichen Stellen A und B dieser Schriftzüge wird ein Leitfähigkeit gemessen, die charakteristisch für die Basisschicht ist und u.a. durch Menge und Art des leitfähigen Additivs bestimmt wird. Somit besteht die Möglichkeit, über definierte Rezepturen kundenspezifisches Etikettenvormaterial herzustellen.To ensure good conductivity, 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. By removing the top In the area of laser marking, 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.
Beide genannten Alternativmöglichkeiten, die Basisschicht eines Zwei- oder Mehrschichtetiketts zu modifizieren, um zusätzliche Fälschungssicherheit in das Etikettenvormaterial einzubauen, können in abgewandelter Form auch für ein Einschichtetikett angewandt werden, wobei jedoch die Vorteile der Erfindung zum Teil nicht in vollem Umfang zum Tragen kommen. Both alternative options mentioned, 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.
Wie ausführlich in DE G 81 30 861.2 beschrieben, besteht ein patentgemäßes Zweischichtlaseretikett
aus z.B. einer dünnen schwarzen Deckschicht und einer dicken
weißen Basisschicht. Die Grundrezeptur für die jeweilige Lackpaste besteht aus 90%
eines handelsüblichen aliphatischen Polyurethanacrylats sowie 10% Hexandiolacrylat.
Die Schwarzpaste wird wie bekannt mit Ruß, die Weißpaste mit Titandioxid als Farbpigment
hergestellt.
10 % Pigment Lumilux® ROT CD 105 FF von Firma Riedel de Haen mit zusätzlich 10% Reaktivverdünner zur Einstellung einer geeigneten Verarbeitungsviskosität.
10% pigment Lumilux® ROT CD 105 FF from Riedel de Haen with an additional 10% reactive thinner to adjust a suitable processing viscosity.
Die Schwarzpaste wird gleichmäßig mit 13 g/m2 auf eine hochglänzende, biaxial gereckte Polyesterfolie von 50 µm ausgestrichen und mit EB-Strahlung [4 kGy] anvernetzt; nach Beschichtung mit der Weißpaste auf die schwarze Deckschicht mit 100 g/m2 erfolgt mit 80 kGy die komplette Durchvernetzung. Beschichtung mit einer Polyacrylathaftklebemasse von 25 g/m2 und Eindeckung mit einem handelsüblichen Silikonpapier ergeben das Etikettenvormaterial für weitere kundenspezifische Verwendungen.The black paste is spread evenly with 13 g / m 2 onto a high-gloss, biaxially stretched polyester film of 50 µm 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.
Nach Belaserung des Zweischichtetiketts mit Logos, Schriftzügen, Barcodes etc. ist bei normalen Tageslicht keine Veränderung gegenüber dem bisherigen Etikett zu erkennen, erst bei Bestrahlung des Etiketts mit einer starken Lichtquelle im nahen UV-Bereich [Wellenlängenmaximum bei ca. 360 nm] leuchtet der belaserte Schriftbereich sowie die Ränder des Etiketts im Bereich der weißen Basisschicht rot-violett. Hilfreich für eine deutliche Erkennung ist ein Sichtschutz zum Abdunkeln des Etikettenbereiches vor Umgebungslicht. After lasering the two-layer label with logos, lettering, barcodes etc. normal daylight no change compared to the previous label, only when the label is irradiated with a strong light source in the near UV range [Wavelength maximum at approx. 360 nm] the lasered writing area and the Edges of the label in the area of the white base layer red-violet. Helpful for one Clear detection is provided by a privacy screen to darken the label area Ambient light.
Analog zu Beispiel A, jedoch anstelle des Leuchtstoffs Luminlux CD, wird in die Weißpaste das langnachleuchtende Pigment Luninova® G 300 M der Fa. Nemoto/Japan mit 20% eingearbeitet.Analogous to example A, but instead of the luminophore Luminlux CD, the white paste is used the long-afterglow pigment Luninova® G 300 M from Nemoto / Japan 20% incorporated.
Nach geeigneter Abdunkelung gegenüber Umgebungslicht wird hier ein charakteristisches Nachleuchten in der Farbe Gelb zum einen durch eine wie in Beispiel A beschriebene UV-Lampe erzielt, aber auch durch eine starke, im sichtbaren Wellenlängenbereich emittierende Lichtquelle. Im Gegensatz zu A ist dieses Leuchten nicht mit Ausschalten der Lichtquelle verschwunden, sondern bleibt noch minutenlang erkennbar.After suitable darkening against ambient light, a characteristic becomes here Afterglow in the color yellow on the one hand by one as described in example A. 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.
Claims (9)
- Laser label comprising at least one polymer layer which is coated on one side with a self-adhesive composition, which is in turn optionally covered with a release paper or a release film, characterized in that an additive for reversible optical labelling, the additive being made recognizable, and especially visible, by means of electron beams, X-rays, in particular by visible light and, very particularly by IR or UV radiation, or an additive suitable for reversible magnetic or electrical labelling has been incorporated into the polymer.
- Laser label according to Claim 1, characterized in that the additive consists of colour pigments, ink particles and/or coloured fibres.
- Laser label according to Claim 1, characterized in that the additive is arranged in the form of various particles in defined proportions as patterns or the like in the polymer, as in the form of a fingerprint.
- Laser label according to Claim 1, characterized in that the additive consists of colour pigments having particle sizes of 0.1 - 5 mm.
- Laser label according to Claim 1, characterized in that the additive is present in the polymer in amounts of 0.1 - 50% by weight, in particular 1 - 25% by weight.
- Laser label according to Claim 1, characterized in that the polymer comprises a further additive which shows a reversal of colour under laser irradiation.
- Laser label according to Claim 1, characterized in that electrically conductive substances are present in the polymer.
- Laser label according to Claim 1, characterized in that on that side of the polymer facing away from the self-adhesive composition there has been applied a further polymer layer which is partially removable by means of laser radiation, said further layer consisting in particular of an electron-beam-cured coating film whose thickness is 1 - 20 µm and whose colour contrasts with that of the underlying layer.
- Use of a laser label according to one of Claims 1 - 8 for anti-counterfeit marking.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997146998 DE19746998B4 (en) | 1997-10-24 | 1997-10-24 | Laser labels and their use |
DE19746998 | 1997-10-24 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0911786A2 EP0911786A2 (en) | 1999-04-28 |
EP0911786A3 EP0911786A3 (en) | 1999-12-29 |
EP0911786B1 true EP0911786B1 (en) | 2002-09-11 |
Family
ID=7846489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19980119458 Expired - Lifetime EP0911786B1 (en) | 1997-10-24 | 1998-10-15 | Laserlabels and their use |
Country Status (4)
Country | Link |
---|---|
US (1) | US6309724B1 (en) |
EP (1) | EP0911786B1 (en) |
DE (2) | DE19746998B4 (en) |
ES (1) | ES2182200T3 (en) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19907940A1 (en) * | 1999-02-24 | 2000-08-31 | Bundesdruckerei Gmbh | Process for the production of multi-layer security products and a security product produced by the process |
DE10112375A1 (en) * | 2001-03-15 | 2002-09-26 | Tesa Ag | Backing material based on fleece, in particular for an adhesive tape with improved hand tearability |
DE10139653A1 (en) * | 2001-08-11 | 2003-02-20 | Tesa Ag | Label with increased protection against counterfeiting |
DE10142638A1 (en) | 2001-08-31 | 2003-05-08 | Tesa Ag | Process for producing a laser-inscribable film |
DE10209497A1 (en) * | 2002-03-05 | 2003-09-25 | Roehm Gmbh | Easily thermoformable plastic board with markings in the protective film |
DE10217120A1 (en) * | 2002-03-14 | 2003-09-25 | Tesa Ag | Information hiding label |
US20040026921A1 (en) * | 2002-03-14 | 2004-02-12 | Tesa Aktiengesellschaft | Label for concealing information |
US6983475B2 (en) | 2002-03-26 | 2006-01-03 | Hewlett-Packard Development Company, L.P. | Method and data storage device that utilizes blocking material |
DE10232197B4 (en) * | 2002-07-16 | 2005-03-03 | Peter Seitz | Label element and use of the same |
AT414227B (en) * | 2002-07-29 | 2006-10-15 | Hueck Folien Gmbh | DATA CARRIER AND SAFETY ELEMENT WITH VISIBLY VISIBLE AND / OR MACHINE READABLE MANIPULATION NOTICE |
DE10256470A1 (en) * | 2002-12-03 | 2004-06-24 | Schreiner Gmbh & Co. Kg | Laser-inscribable film |
US20040244907A1 (en) * | 2003-06-06 | 2004-12-09 | Huffer Scott W. | Methods of making printed labels and labeling articles |
WO2005069868A2 (en) * | 2004-01-15 | 2005-08-04 | Joel Sterling Douglas | Security marking and security mark |
US20050156318A1 (en) * | 2004-01-15 | 2005-07-21 | Douglas Joel S. | Security marking and security mark |
US20060097513A1 (en) * | 2004-07-01 | 2006-05-11 | Caldwell Mason A | Identification Label |
DE102004038774A1 (en) * | 2004-08-09 | 2006-02-23 | Tesa Ag | Laser film of an at least single-layer carrier layer of a transparent film, which is coated on one side with a self-adhesive |
DE102005043221A1 (en) * | 2005-09-09 | 2007-03-15 | Tesa Ag | self-adhesive tape |
US8263213B2 (en) * | 2006-12-19 | 2012-09-11 | E I Du Pont De Nemours And Company | Painted composite thermoplastic articles |
WO2009081415A2 (en) * | 2007-12-24 | 2009-07-02 | Prs Solutions Private Limited | Process of manufacturing audio/visual detectable and tamper evident label stock for authentication |
ES2731136T3 (en) * | 2009-06-05 | 2019-11-14 | Techno Medica Co Ltd | Labeling device for an automatic test tube placement device |
JP5652496B2 (en) * | 2013-03-29 | 2015-01-14 | カシオ電子工業株式会社 | Label mount, label with mount and adhesive label, and method for producing the same |
LU101796B1 (en) * | 2020-05-14 | 2021-11-15 | Phoenix Contact Gmbh & Co | Laser markable label |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8130861U1 (en) * | 1981-10-22 | Beiersdorf Ag, 2000 Hamburg | Multi-layer label | |
EP0453131A3 (en) * | 1990-04-12 | 1992-04-29 | James River Corporation | Security paper and method of manufacturing same |
DE4231800A1 (en) * | 1992-09-23 | 1994-03-24 | Schreiner Etiketten | Identification label or plate to mark objects - leaves undissolvable traces on object after removal from it |
DE4405612C2 (en) * | 1994-02-22 | 1997-02-20 | Gerecke & Lauer Gmbh Fa | Laser-inscribable multi-layer label material |
JP3418746B2 (en) * | 1993-10-05 | 2003-06-23 | 日立マクセル株式会社 | ink ribbon |
CN1088239A (en) * | 1993-11-30 | 1994-06-22 | 中国科学院上海技术物理研究所 | A kind of magnetic colour-changing ink and its production and application |
DE9421868U1 (en) * | 1994-06-22 | 1997-02-13 | Beiersdorf Ag, 20253 Hamburg | Single-layer laser label |
DE4421865A1 (en) * | 1994-06-22 | 1996-01-04 | Beiersdorf Ag | Single-layer laser label |
JPH0854825A (en) * | 1994-08-11 | 1996-02-27 | Honda Motor Co Ltd | Label |
FR2730671B1 (en) * | 1995-02-17 | 1997-04-04 | Sibille Dalle | PRINTABLE DOCUMENT COMPRISING MEANS REVEALING FALSIFICATION |
DE19509505C1 (en) | 1995-03-16 | 1996-01-25 | Beiersdorf Ag | Multilayer laser codable label |
FR2734655B1 (en) * | 1995-05-23 | 1997-08-14 | Seror Marc Allain | METHOD FOR ESTABLISHING A TRUSTED FALSIFICATION DOCUMENT, AND FIDUCIARY DOCUMENT OBTAINED |
JPH08328474A (en) * | 1995-05-30 | 1996-12-13 | Hideaki Nakai | Multilayered woven label |
DE19531332C2 (en) * | 1995-08-25 | 1998-07-16 | Beiersdorf Ag | Use of labels for marking rubber parts, in particular tires |
US5914165A (en) * | 1996-07-29 | 1999-06-22 | Avery Dennison Corporation | Peelable label for articles for resale |
DE19642040C1 (en) * | 1996-10-11 | 1998-01-15 | Schreiner Etiketten | Label with hologram, written by laser beam passing through clear, protective upper film |
-
1997
- 1997-10-24 DE DE1997146998 patent/DE19746998B4/en not_active Expired - Fee Related
-
1998
- 1998-10-15 DE DE59805492T patent/DE59805492D1/en not_active Expired - Lifetime
- 1998-10-15 US US09/173,278 patent/US6309724B1/en not_active Expired - Fee Related
- 1998-10-15 ES ES98119458T patent/ES2182200T3/en not_active Expired - Lifetime
- 1998-10-15 EP EP19980119458 patent/EP0911786B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ES2182200T3 (en) | 2003-03-01 |
EP0911786A3 (en) | 1999-12-29 |
DE19746998A1 (en) | 1999-04-29 |
DE19746998B4 (en) | 2008-06-05 |
US6309724B1 (en) | 2001-10-30 |
EP0911786A2 (en) | 1999-04-28 |
DE59805492D1 (en) | 2002-10-17 |
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