EP1628279B1 - Laserfilm - Google Patents

Laserfilm Download PDF

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Publication number
EP1628279B1
EP1628279B1 EP05106839A EP05106839A EP1628279B1 EP 1628279 B1 EP1628279 B1 EP 1628279B1 EP 05106839 A EP05106839 A EP 05106839A EP 05106839 A EP05106839 A EP 05106839A EP 1628279 B1 EP1628279 B1 EP 1628279B1
Authority
EP
European Patent Office
Prior art keywords
adhesive
laser
film
film according
laser film
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 - Fee Related
Application number
EP05106839A
Other languages
German (de)
English (en)
Other versions
EP1628279A3 (fr
EP1628279A2 (fr
Inventor
Christian Kreft
Sören Kahlcke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tesa SE
Original Assignee
Tesa SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tesa SE filed Critical Tesa SE
Publication of EP1628279A2 publication Critical patent/EP1628279A2/fr
Publication of EP1628279A3 publication Critical patent/EP1628279A3/fr
Application granted granted Critical
Publication of EP1628279B1 publication Critical patent/EP1628279B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • 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
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/41—Base layers supports or substrates
    • 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

Definitions

  • the invention relates to a laser film of an at least single-layer carrier layer of a transparent film, which is coated on one side with a self-adhesive, and the use of the same on packaging or objects to be transported.
  • the laser film according to the preamble of claim 1 is known from US 2004 026921 known.
  • Labeling and labeling of materials by laser is a widely used process.
  • material is removed from the material to be inscribed during the inscription process. If a thin, differently colored cover layer is removed from a base layer, high-contrast lettering can be achieved.
  • Such a multilayer label of a thin and a thick self-supporting, opaque pigmented lacquer layer is disclosed. Both layers consist of an electron beam-hardened solvent-free applied paint, wherein the layer thicknesses are different.
  • the labeling of the label takes place in that with the aid of a laser, the upper thinner lacquer layer is burned away, so that the lower thicker lacquer layer is visible, the lower layer preferably having a contrasting color to the former.
  • This lettering is a type of engraving, which eliminates the manipulation possibilities as with traditional printing with inks and inks.
  • the label is set by the raw materials used and the manufacturing process so brittle that removal of the same from the adhesive substrates is almost always possible only with destruction.
  • a laser-writable multi-layer label material is shown which is composed of a first layer, a second layer differing optically from the first layer, the first layer being removable by laser radiation in accordance with a desired typeface or print image to visualize the surface of the second layer.
  • a transparent plastic film forming a carrier layer is furthermore arranged.
  • the DE 44 21 865 A1 shows a Ein harshlaseretikett from a carrier layer made of plastic, which contains an additive that shows a color change under laser irradiation.
  • the carrier layer is coated on one side with a self-adhesive, which is optionally covered with a release paper or a release film.
  • the carrier layer consists of a lacquer, in particular of a cured lacquer, preferably a radiation-cured lacquer, in particular of an electron beam-cured polyurethane acrylate lacquer.
  • the carrier layer is made of a polybutylene terephthalate.
  • a security film which has a carrier layer in which an identification medium is contained.
  • the diffusion properties of this identification medium can be specifically selectively and locally changed. If the security film labeled in this way is adhered to a workpiece, the identification medium diffuses toward the substrate surface, where it causes a detectable reaction. In this case, this diffusion or reaction takes place only in those areas of the substrate surface in which the diffusion capability was triggered or not hindered by the inscription process.
  • the security film allows a clear labeling and identification of the workpiece.
  • the security film is labeled by means of a non-contact method.
  • the labeling of the security film - and thus the change of the diffusion properties of the identification medium - can be done in particular by means of electromagnetic radiation.
  • Particularly advantageous for labeling the security film is the use of a laser, with the help of both a temperature and a light-sensitive labeling can be done (where the term "light” in this Case covers the entire range of the electromagnetic spectrum accessible to the laser).
  • Lasers have the additional advantage of enabling high-contrast labels with any choice of pattern, allowing rapid changes to the labeling pattern and being able to be used reliably in the factory environment.
  • An additional safety aspect is in the DE 199 04 823 A1 disclosed.
  • a method for producing a film is described in which initially a support carrier film is embossed by means of an embossing tool, wherein the embossing tool has holographic structures. Subsequently, a film is produced on the embossed support carrier film, so that at least one hologram appears on the film.
  • a laser-writable rubber compound known as a laser-writable rubber compound known.
  • a rubber preferably a natural rubber, to which an additive having a color change under laser irradiation is added, is used.
  • the rubber may also be blended with conventional additives such as anti-aging agents, crosslinking agents, light stabilizers, antiozonants, carbon black, zinc oxide, fatty acids, resins, plasticizers or accelerators.
  • Suitable additives for producing the color change are, in particular, color pigments and metal salts, in particular copper hydroxide phosphate or else iriodine. These additives are added to the rubber on the order of 0.1 to 10% by weight, especially 0.5 to 5% by weight. Furthermore, titanium dioxide can additionally be added to the additive.
  • a label is produced in the carrier layer of the adhesive tape or label.
  • the carrier layer consists of a PET or PP film. Further preferably, the carrier layer has a thickness of 10 to 200 .mu.m, in particular from 50 to 100 .mu.m.
  • the carrier layer can also be formed by a multilayer laminate of different films, wherein each individual film must be transparent.
  • the laser-sensitive additive is present in the adhesive, which produces a color change under laser irradiation.
  • the adhesive has in addition to the writability of a laser in particular the properties of a pressure-sensitive adhesive.
  • the adhesive has a light hue.
  • the properties of the adhesive are based on the requirements in the applications typical of laser films or of labels produced therefrom.
  • the basis for the adhesive is a rubber, for example natural rubber or a blend of natural and synthetic rubbers.
  • This rubber or rubber blend is added to said absorber pigment, which is responsible for the color change.
  • the rubber may be blended with conventional additives such as fillers, anti-aging agents, crosslinkers, color pigments, zinc oxide or resins.
  • crosslinking by UV radiation, electron beam curing can be carried out by thermal or chemical means.
  • the adhesive layer has a thickness of 15 to 200 ⁇ m, in particular 30 to 100 ⁇ m.
  • the absorber pigments used to produce the color change are, in particular, color pigments or metal salts, in particular copper hydroxide phosphate.
  • This additive is added to the adhesive in the range of 0.1 to 10 wt .-%, in particular 0.5 to 5 wt .-%, based on the total weight of the adhesive.
  • the term laser film comprises an adhesive tape which can be wound into an Archimedean spiral, and laser labels or sections which are cut to length from the adhesive tape depending on the application.
  • the laser labels / sections can also be punched.
  • Laser marking has the further advantage over conventional printing systems, such as thermal transfer printing, that the flexibility of the lettering (continuous serial numbering, short-term change from plain text to barcode or the like) is significantly greater.
  • a particularly advantageous use of the label according to the invention is in the packaging and printing of packages or objects to be transported for shipping or in the logistics area.
  • the optionally labeled label is applied to the packaging unit manually or by machine.
  • the labeling can be done before or after application.
  • an individual inscription for example addresses, control codes is glued to the packaging unit; a separate gluing process with a barcode or address label is unnecessary.
  • the inscription of the adhesive can be carried out with the aid of Nd-Yag solid-state lasers, in particular at a light wavelength of 1064 nm.
  • electroplating systems or masks can be used.
  • the additive embedded in the adhesive such as preferred copper hydroxide phosphate, absorbs the energy. This creates a strong heat in the immediate vicinity of the irradiated Particles by absorption of the high-energy radiation, so that a carbonization of the adjacent polymer matrix takes place.
  • the adhesive which is preferably brightly colored mainly by admixing titanium dioxide, changes its color in the region of the carbonization that has occurred, to gray to black shades, depending on the amount of energy used. This color change produces high-contrast labels. When labeling the carrier film of the tape remains unchanged and the color change in the adhesive takes place without or with minimal material removal.
  • the laser-writable film can advantageously cover new applications.
  • a preferred use are by the use of tear-resistant film carrier, combined with laser-inscribable adhesive bonds in the packaging area with additional labeling option or other temporary or permanent bonding of all kinds.
  • the previously known solutions for gluing / gluing and labeling of a product provide at least two adhesive applications used side by side.
  • an adhesive tape which ensures the bonding
  • a label with printed data such as addresses, control barcodes, etc.
  • the invention described herein combines these adhesive applications together, that is, the invention describes a film which simultaneously assures bonding as well as provides the ability to make labels thereon.
  • the FIG. 1 shows a laser film, which consists of a carrier layer 1, here a transparent 40 micron PET film, on which an adhesive 2 is applied.
  • the laser film is irradiated at the desired locations with a Nd-YAag laser 3.
  • the jet 3 penetrates through the transparent film 1 and is absorbed by the additive in the adhesive 2, resulting in a carbonization of the immediate environment 4 leads.
  • the carbonized material gives the desired label after completion of the irradiation.
  • FIG. 2 a particularly advantageous use of the laser film is shown.
  • the laser film is glued to a substrate 5.
  • the lettering of the film takes place in such a way that the adhesive 2 is carbonized at the point of impact of the laser beam 3 over the entire thickness of the layer.
  • the beam 3 is guided so that the surface of the substrate 5 is also changed / labeled by the laser beam 3.
  • An image 41 of the inscription in the laser film appears in the background 5. Should the laser film be removed from the background 5, this manipulation attempt would be immediately visible because the inscription 41 in the background 5 is no longer covered by the laser film.
  • the laser film according to the invention thus also includes the option of being used as a security label.
  • Wt .-% natural rubber 42.40 chalk 10.10 C 5 -fractionated aliphatic hydrocarbon resin 39.40 ZnO 5.10 Titanium dioxide 1.00 copper hydroxide 1.00 Anti-aging agents 1.00 total 100.00
  • the preparation of the adhesive takes place discontinuously in two steps; Preparation of a premix and the final mixture.
  • the total formulation corresponding amount of elastomer (natural rubber), filler, zinc oxide, titanium dioxide, anti-aging agents, copper hydroxide and about 1 ⁇ 4 of the total amount of adhesive resin (C 5 -fractionated aliphatic hydrocarbon resin Piccotac 1100E Eastman) are weighed to the nearest gram for the following steps and kneading ( Internal mixer) of the type Werner & Pfleiderer, which by intermeshing waves with a maximum speed of 50 U / min. is presented submitted.
  • the kneading time is 3 minutes at a kneading temperature of 95 ° C.
  • the premix is taken out of the kneader and transferred with the remaining amount of tackifier resin (3/4 of the total) in a common for rubber adhesives universal kneader.
  • the kneading time of the premix with the adhesive resin takes place over a period of 15 minutes at a kneading temperature of 95 ° C.
  • the adhesive resin is added in portions in time intervals of 4 minutes in the kneading premix.
  • the preparation of the adhesive can also be carried out in continuous production.
  • the required raw materials are compounded directly via dosing according to the recipe in the extruder process.
  • the process offers itself over the planetary roller extruder.
  • the molding of the adhesive takes place to an adhesive film in a 3-roll coating unit.
  • the carrier film is threaded through the coating gap and this adjusted so that Klebmasseetzträge of 15 to 200 microns, preferably from 30 to 100 microns, or the film is pressed after the coating gap on the transfer roller against the molded adhesive and thus transferred.
  • the coated carrier film is wound into rolls, If necessary, a masking paper or a cover film can be laminated to the adhesive.
  • the rolled goods produced in this way can now be subjected to UV radiation or electron beam curing on the adhesive side.
  • the labeling of the adhesive is carried out with a Nd-Yag solid-state laser with Galvanoablenksystem.
  • the parameters can be varied accordingly.

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

Claims (8)

  1. Film laser en une couche support (1) au moins monoface formée par une feuille transparente, qui est revêtue sur une face par une masse autoadhésive (2), la masse autoadhésive (2) étant le cas échéant recouverte par un papier de séparation ou une feuille de séparation, caractérisé en ce que la masse autoadhésive (2) contient un additif qui présente un changement de couleur sous l'effet d'un rayonnement au laser (3).
  2. Film laser selon la revendication 1, caractérisé en ce que la couche support (1) est constituée par une feuille en PET ou en PP.
  3. Film laser selon la revendication 1 ou 2, caractérisé en ce que l'additif est un pigment coloré ou un sel métallique, surtout un hydroxyde-phosphate de cuivre.
  4. Film laser selon au moins l'une quelconque des revendications 1 à 3, caractérisé en ce que l'additif est utilisé en des quantités de 0,1 à 10% en poids, en particulier de 0,5 à 5% en poids, par rapport au poids total de la masse adhésive (2).
  5. Film laser selon au moins l'une quelconque des revendications précédentes, caractérisé en ce qu'outre l'additif, du dioxyde de titane est présent en plus dans la masse adhésive (2).
  6. Film laser selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la couche support (1) présente une épaisseur de 10 à 200 µm, en particulier de 50 à 100 µm.
  7. Film laser selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la couche de masse adhésive (2) présente une épaisseur de 15 à 200 µm, en particulier de 30 à 100 µm.
  8. Utilisation d'un film laser selon au moins l'une quelconque des revendications précédentes dans l'emballage et l'impression de paquets ou d'objets à transporter pour l'envoi ou dans le domaine logistique.
EP05106839A 2004-08-09 2005-07-26 Laserfilm Expired - Fee Related EP1628279B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004038774A DE102004038774A1 (de) 2004-08-09 2004-08-09 Laserfilm aus einer zumindest einschichtigen Trägerschicht aus einer transparenten Folie, die einseitig mit einer Selbstklebemasse beschichtet ist

Publications (3)

Publication Number Publication Date
EP1628279A2 EP1628279A2 (fr) 2006-02-22
EP1628279A3 EP1628279A3 (fr) 2006-09-27
EP1628279B1 true EP1628279B1 (fr) 2008-10-29

Family

ID=35395698

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05106839A Expired - Fee Related EP1628279B1 (fr) 2004-08-09 2005-07-26 Laserfilm

Country Status (4)

Country Link
US (1) US20060029760A1 (fr)
EP (1) EP1628279B1 (fr)
DE (2) DE102004038774A1 (fr)
ES (1) ES2314575T3 (fr)

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DE102017005999A1 (de) 2017-05-28 2018-11-29 Entex Rust & Mitschke Gmbh Herstellung von essbaren Wurstpellen aus Kollagen oder gleichartigen Stoffen durch Extrudieren
DE102017005998A1 (de) 2017-06-23 2018-12-27 Entex Rust & Mitschke Gmbh Chemische Prozeßführung für fließfähiges Einsatzgut in einem Planetwalzenextruder
DE102017006638A1 (de) 2017-07-13 2019-01-17 Entex Rust & Mitschke Gmbh Füllteilmodul in Planetwalzenextruderbauweise
DE102018001412A1 (de) 2017-12-11 2019-06-13 Entex Rust & Mitschke Gmbh Entgasen beim Extrudieren von Stoffen, vorzugsweise von Kunststoffen
WO2019166125A1 (fr) 2018-02-28 2019-09-06 Entex Rust & Mitschke Gmbh Procédé pour la préparation et la transformation de polymères et de mélanges polymères dans une extrudeuse planétaire de structure modulaire
KR20210072392A (ko) 2019-12-09 2021-06-17 쓰리엠 이노베이티브 프로퍼티즈 컴파니 접착 필름
DE102020007239A1 (de) 2020-04-07 2021-10-07 E N T E X Rust & Mitschke GmbH Kühlen beim Extrudieren von Schmelzen
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Also Published As

Publication number Publication date
US20060029760A1 (en) 2006-02-09
DE102004038774A1 (de) 2006-02-23
EP1628279A3 (fr) 2006-09-27
EP1628279A2 (fr) 2006-02-22
ES2314575T3 (es) 2009-03-16
DE502005005785D1 (de) 2008-12-11

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