EP1056602A1 - Use of a heat-sensitive recording material as a label - Google Patents

Use of a heat-sensitive recording material as a label

Info

Publication number
EP1056602A1
EP1056602A1 EP99913163A EP99913163A EP1056602A1 EP 1056602 A1 EP1056602 A1 EP 1056602A1 EP 99913163 A EP99913163 A EP 99913163A EP 99913163 A EP99913163 A EP 99913163A EP 1056602 A1 EP1056602 A1 EP 1056602A1
Authority
EP
European Patent Office
Prior art keywords
layer
heat
sensitive recording
recording material
protective 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.)
Granted
Application number
EP99913163A
Other languages
German (de)
French (fr)
Other versions
EP1056602B1 (en
Inventor
Wolfgang Wagner
Jutta Berndt
Bernd Gerecht
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.)
Mitsubishi HiTech Paper Flensburg GmbH
Stora Spezialpapiere GmbH
Original Assignee
Mitsubishi HiTech Paper Flensburg GmbH
Stora Spezialpapiere GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi HiTech Paper Flensburg GmbH, Stora Spezialpapiere GmbH filed Critical Mitsubishi HiTech Paper Flensburg GmbH
Publication of EP1056602A1 publication Critical patent/EP1056602A1/en
Application granted granted Critical
Publication of EP1056602B1 publication Critical patent/EP1056602B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B41M5/40—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
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
    • 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
    • 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
    • B41M5/42—Intermediate, backcoat, or covering layers
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2848—Three or more layers

Definitions

  • the present invention relates to the use of a heat-sensitive recording material consisting of a support, a heat-sensitive recording layer arranged on the front of the support, comprising a dye precursor and a color acceptor which undergoes a color formation reaction when in contact with the dye precursor, an intermediate layer arranged between the support and the heat-sensitive recording layer and a protective layer covering the heat-sensitive recording layer and hardened by means of actinic radiation.
  • a heat-sensitive recording material of the type specified above is known from DE-C-3312716.
  • the protective layer specified there serves to limit harmful influences which act on the recording material through water, plasticizers, oils or organic solvents and impair the stability of the image density.
  • a heat-sensitive recording material with a glossy surface which has a protective layer hardened by actinic radiation, which is said to show excellent adaptability to the thermal head without causing pressure drops.
  • a heat-sensitive recording material which has a protective layer arranged over the heat-sensitive recording layer and a back coating, both of which are hardened by means of electron beams.
  • An intermediate layer of crosslinked polymers, also hardened by means of electron beams, is additionally arranged between the carrier material and the drawing layer. This intermediate layer is intended to limit the influence of the carrier material on the color formation reaction and the contrast of the resulting image with the background of the image.
  • DE-A-42 25 419 discloses a heat-sensitive recording material with a cover layer which has a resin curable by ionizable radiation, the cover layer containing a silicone surface active agent and microspheres of low molecular weight olefin polymer resin.
  • the known heat-sensitive recording material is intended as a sticker, for. B, can be used in a fully automatic labeling machine, on the one hand avoiding contamination of the recording head by components of the cover layer, but on the other hand that perfect printability should be ensured.
  • a process for producing a heat-sensitive layer and a protective layer to be applied to the heat-sensitive layer from the mixture of a water-soluble or water-dispersible binder which can be crosslinked with electron beams and a prepolymer or monomers curable by electron beams is known from EP-B-0 159 659. It is stated that better resistance to water or moisture should be obtained compared to the conventional heat sensitive recording materials. The use of polysiloxane compounds is proposed for this purpose.
  • a heat-sensitive recording material is also known from EP-A-0 780 241, the protective layer of which contains a silicone component. This proposal is intended to achieve better behavior of the recording material on the thermal head and to reduce the so-called fogging.
  • a heat-sensitive recording material is known from the unpublished DE-A-19757 589, which has two intermediate layers applied to the heat-sensitive recording layer, namely a barrier layer and a release layer provided on the barrier layer, the release layer consisting mainly of silicone-containing compounds.
  • Heat-sensitive recording papers the protective layer of which contains a silicone component
  • the addition of silicone is intended to prevent the adhesive layer on the back from sticking to the protective layer. This creates the disadvantage that the printability in flexographic and offset printing is impaired by the addition of silicone.
  • the invention provides to use a heat-sensitive recording material which comprises:
  • a substrate on the front of which a heat-sensitive recording layer is arranged, which contains a dye precursor and a color acceptor, which undergoes a color formation reaction when in contact with the dye precursor
  • b) an intermediate layer arranged between the substrate and the heat-sensitive recording layer c) a heat-sensitive recording layer covering and protective layer free of silicone-containing compounds hardened by actinic radiation
  • a self-adhesive layer arranged on the back of the layer support, e) label material which can be wound up on a roll and printed on using the offset or flexographic printing process, in which the self-adhesive layer with the protective layer in Contact is there.
  • actinic radiation used in claims and description is to be understood as UV or ionizing radiation, such as electron beams. If the top layer is to be hardened by means of UV rays, the monomers or prepolymers used to produce the top layer must contain additives of initiators in a known manner.
  • Electron beam hardening was able to achieve a particularly uniform cross-section, i. H. cured top layer can be achieved.
  • the formation of the cover layer with a basis weight in the range from 0.5 to 3.5 g / m 2 is preferred.
  • the resin component present in the protective layer and hardened by means of actinic radiation is formed from the monomers or prepolymers of acrylate and / or methacrylate.
  • pigments and crosslinking aids can be present in a minor amount in the top layer; in any case, however, the cover layer is free of silicone-containing compounds.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Adhesive Tapes (AREA)

Abstract

A heat-sensitive recording material, comprising a layer support, on whose front face a heat-sensitive recording layer is arranged, containing a colorant precursor and a colorant acceptor which undergoes a colorant formation reaction when it comes into contact with the colorant precursor, an intermediate layer arranged between the layer support and heat-sensitive recording layer, a protective layer that is free from compounds containing silicone, is hardened by actinic radiation and covers the heat-sensitive recording layer and a self-adhesive layer arranged on the back of the layer support, is used as a label material which can be wound on a roll and printed by the offset or flexographic printing process and in which the self-adhesive layer is in contact with the protective layer in the roll.

Description

Verwendung eines wärmeempfindlichen Aufzeichnungsmaterials als Etikett Use of a heat-sensitive recording material as a label
Die vorliegende Erfindung betrifft die Verwendung eines wärmeempfindlichen Aufzeichnungsmaterials, bestehend aus einem Schichtträger, einer auf der Vorderseite des Schichtträgers angeordneten wärmeempfindlichen Aufzeichnungsschicht, enthaltend einen Farbstoffvorläufer und einen Farbakzeptor, der bei Kontakt mit dem Farbstoffvorläufer einer Farbbildungsreaktion unterliegt, einer zwischen Schichtträger und wärmeempfindlicher Aufzeichnungsschicht angeordneten Zwischenschicht und einer die wärmeempfindliche Aufzeichnungsschicht abdeckenden mittels aktinischer Strahlung gehärteten Schutzschicht.The present invention relates to the use of a heat-sensitive recording material consisting of a support, a heat-sensitive recording layer arranged on the front of the support, comprising a dye precursor and a color acceptor which undergoes a color formation reaction when in contact with the dye precursor, an intermediate layer arranged between the support and the heat-sensitive recording layer and a protective layer covering the heat-sensitive recording layer and hardened by means of actinic radiation.
Ein wärmeempfindliches Aufzeichnungsmaterial der vorstehend angegebenen Art ist aus der DE-C-3312716 bekannt. Die dort angegebene Schutzschicht dient der Einschränkung schädlicher Einflüsse, die durch Wasser, Weichmacher, Öle oder organische Lösungsmittel auf das Aufzeichnungsmaterial einwirken und die Beständigkeit der Bilddichte beeinträchtigen.A heat-sensitive recording material of the type specified above is known from DE-C-3312716. The protective layer specified there serves to limit harmful influences which act on the recording material through water, plasticizers, oils or organic solvents and impair the stability of the image density.
Gemäß der DE-A-3935070 wird ein wärmeempfindliches Aufzeichnungsmaterial mit einer glänzenden Oberfläche vorgeschlagen, das eine durch aktinische Strahlung gehärtete Schutzschicht aufweist, die ein ausgezeichnetes Anpassungsvermögen an den Thermokopf ohne Verursachung von Druckausfällen zeigen soll. 2According to DE-A-3935070, a heat-sensitive recording material with a glossy surface is proposed which has a protective layer hardened by actinic radiation, which is said to show excellent adaptability to the thermal head without causing pressure drops. 2
Aus der DE-C-40 12 185 ist ein wärmeempfindliches Aufzeichnungsmaterial bekannt, das eine über der wärmeempfϊndlichen Aufzeichnungsschicht angeordnete Schutzschicht und eine Rückseitenbeschichtung aufweist, die beide mittels Elektronenstrahlen ausgehärtet sind. Zwischen Trägermaterial und Auf Zeichnungsschicht ist zusätzlich eine ebenfalls mittels Elektronenstrahlen ausgehärtete Zwischenschicht aus vernetzen Polymeren angeordnet. Mit dieser Zwischenschicht soll der Einfluß des Trägermaterials auf die Farbbildungsreaktion und den Kontrast des entstehenden Bildes gegenüber dem Bildhintergrund eingeschränkt werden.From DE-C-40 12 185 a heat-sensitive recording material is known which has a protective layer arranged over the heat-sensitive recording layer and a back coating, both of which are hardened by means of electron beams. An intermediate layer of crosslinked polymers, also hardened by means of electron beams, is additionally arranged between the carrier material and the drawing layer. This intermediate layer is intended to limit the influence of the carrier material on the color formation reaction and the contrast of the resulting image with the background of the image.
Die DE-A-42 25 419 offenbart ein wärmeempfindliches Aufzeichnungsmaterial mit einer Deckschicht, die ein durch ionisierbare Strahlung härtbares Harz aufweist, wobei in der Deckschicht ein Silikon - Oberflächenaktivmittel und Mikro- kugeln von niedrig molekularem Olefinpolymerharz vorliegen. Das bekannte wärmeempfindliche Aufzeichnungsmaterial soll als Aufkleber, z. B, in einer vollautomatischen Etikettiermaschine, eingesetzt werden, wobei einerseits eine Verschmutzung des Aufzeichnungskopfes durch Bestandteile der Deckschicht zu vermeiden ist, andererseits aber eine einwandfreie Bedruckbarkeit gewährleistet bleiben soll.DE-A-42 25 419 discloses a heat-sensitive recording material with a cover layer which has a resin curable by ionizable radiation, the cover layer containing a silicone surface active agent and microspheres of low molecular weight olefin polymer resin. The known heat-sensitive recording material is intended as a sticker, for. B, can be used in a fully automatic labeling machine, on the one hand avoiding contamination of the recording head by components of the cover layer, but on the other hand that perfect printability should be ensured.
Ein Verfahren zur Herstellung einer wärmeempfindlichen Schicht sowie einer auf die wärmeempfindliche Schicht aufzubringenden Schutzschicht aus der Mischung eines mit Elektronenstrahlen vernetzbaren wasserlöslichen oder wasserdispergierbaren Bindemittels und einem durch Elektronenstrahlen härtbaren Prepolymeren oder Monomeren ist aus der EP-B-0 159 659 bekannt. Es wird angegeben, daß eine bessere Beständigkeit gegen Wasser oder Feuchtigkeit im Vergleich zu den konventionellen wärmeempfindlichen Aufzeichnungsmaterialien erziert werden soll. Dazu wird die Verwendung von Polysilox- anverbindungen vorgeschlagen.A process for producing a heat-sensitive layer and a protective layer to be applied to the heat-sensitive layer from the mixture of a water-soluble or water-dispersible binder which can be crosslinked with electron beams and a prepolymer or monomers curable by electron beams is known from EP-B-0 159 659. It is stated that better resistance to water or moisture should be obtained compared to the conventional heat sensitive recording materials. The use of polysiloxane compounds is proposed for this purpose.
Der vorstehend diskutierte Stand der Technik zeigt, daß die bisher bekannten Schutzschichten vorwiegend zur Verbesserung der Chemikalienbeständigkeit, Wasserfestigkeit oder Weichmacherfestigkeit dienen sollen. Andererseits sind auch Vorschläge bekannt, wärmeempfindliche Aufzeichnungsmaterialien als Etikett einzusetzen. Solche Vorschläge sind bekannt aus der US-A-4717709 und der EP-A-0373903. Diese Vorschläge zielen darauf ab, die wärmeempfindlichen Etiketten auf Releasepapier anzuordnen, so daß sie auf Rollen aufgewickelt und als Rolle einem Thermodrucker vorgelegt werden können. Die Verwendung von Releasepapieren verteuert das Produkt insgesamt und ist daher nachteilig.The prior art discussed above shows that the previously known protective layers are primarily intended to improve chemical resistance, water resistance or plasticizer resistance. On the other hand also known proposals to use heat-sensitive recording materials as a label. Such proposals are known from US-A-4717709 and EP-A-0373903. These proposals aim to arrange the heat-sensitive labels on release paper so that they can be wound up on rolls and presented as a roll to a thermal printer. The use of release papers makes the product more expensive overall and is therefore disadvantageous.
Aus der EP-A-0 780 241 ist auch ein wärmeempfindliches Aufzeichnungsmaterial bekannt, in dessen Schutzschicht eine Silikonkomponente enthalten ist. Mit diesem Vorschlag soll ein besseres Verhalten des Aufzeichnungsmaterials am Thermokopf erzielt und die sogenannte Schleierbildung vermindert werden.A heat-sensitive recording material is also known from EP-A-0 780 241, the protective layer of which contains a silicone component. This proposal is intended to achieve better behavior of the recording material on the thermal head and to reduce the so-called fogging.
Aus der nicht vorveröffentlichten DE-A-19757 589 ist ein wärmeempfindiiches Aufzeichnungsmaterial bekannt, das zwei auf die wärmeempfindliche Aufzeichnungsschicht aufgebrachte Zwischenschichten aufweist, nämlich eine Sperrschicht und eine auf der Sperrschicht vorgesehene Ablöseschicht, wobei die Ablöseschicht hauptsächlich aus silikonhaltigen Verbindungen besteht.A heat-sensitive recording material is known from the unpublished DE-A-19757 589, which has two intermediate layers applied to the heat-sensitive recording layer, namely a barrier layer and a release layer provided on the barrier layer, the release layer consisting mainly of silicone-containing compounds.
Wärmeempfindliche Aufzeichnungspapiere, deren Schutzschicht eine Silikonkomponente enthält, sind auch bereits ohne zusätzliche Verwendung von Releasepapier zur Herstellung von von Rollen abwickelbaren Etiketten eingesetzt worden. Durch den Silikonzusatz soll dabei ein Verkleben der rückseitigen Klebeschicht mit der Schutzschicht vermieden werden. Hier entsteht der Nachteil, daß durch den Silikonzusatz die Bedruckbarkeit im Flexo - und Offsetdruck beeinträchtigt wird.Heat-sensitive recording papers, the protective layer of which contains a silicone component, have also been used without additional release paper for the production of labels that can be unwound from rolls. The addition of silicone is intended to prevent the adhesive layer on the back from sticking to the protective layer. This creates the disadvantage that the printability in flexographic and offset printing is impaired by the addition of silicone.
Es ist ein Ziel der vorliegenden Erfindung, diese Nachteile zu beseitigen und ein wärmeempfindliches Aufzeichnungsmaterial mit einer auf seiner Rückseite angebrachten Selbstklebeschicht zur Verfügung zu stellen, das in Rollenform einem Thermodrucker zugeführt wird, wobei auf den Einsatz eines Releasepapiers oder auf einen Silikonzusatz in der Schutzschicht verzichtet wird, so daß 4 auch eine befriedigende Bedruckbarkeit im Flexo - und Offsetdruck gewährleistet ist.It is an object of the present invention to overcome these disadvantages and to provide a heat-sensitive recording material with a self-adhesive layer applied to its rear side, which is supplied in roll form to a thermal printer, without the use of release paper or a silicone additive in the protective layer is so that 4 satisfactory printability in flexographic and offset printing is also guaranteed.
Zur Lösung dieser Aufgabe sieht die Erfindung vor, ein wärmeempfindliches Aufzeichnungsmaterial zu verwenden, das umfaßt:To achieve this object, the invention provides to use a heat-sensitive recording material which comprises:
a) einen Schichtträger, auf dessen Vorderseite eine wärmeempfindliche Aufzeichnungsschicht angeordnet ist, die einen Farbstoffvorläufer und einen Farbakzeptor enthält, der bei Kontakt mit dem Farbstoffvorläufer einer Farbbildungsreaktion unterliegt, b) eine zwischen Schichtträger und wärmeempfindlicher Aufzeichnungsschicht angeordnete Zwischenschicht, c) eine die wärmeempfindliche Aufzeichnungsschicht abdeckende und mittels aktinischer Strahlung gehärtete von silikonhaltigen Verbindungen freie Schutzschicht, sowie d) eine auf der Rückseite des Schichtträgers angeordnete Selbstklebeschicht, e) als auf Rolle aufwickelbares und im Offset - oder Flexodruckverfahren zu bedruckendes Etikettenmaterial, bei dem in der Rolle die Selbstklebeschicht mit der Schutzschicht in Kontakt steht.a) a substrate, on the front of which a heat-sensitive recording layer is arranged, which contains a dye precursor and a color acceptor, which undergoes a color formation reaction when in contact with the dye precursor, b) an intermediate layer arranged between the substrate and the heat-sensitive recording layer, c) a heat-sensitive recording layer covering and protective layer free of silicone-containing compounds hardened by actinic radiation, and d) a self-adhesive layer arranged on the back of the layer support, e) label material which can be wound up on a roll and printed on using the offset or flexographic printing process, in which the self-adhesive layer with the protective layer in Contact is there.
Es hat sich in der Praxis gezeigt, daß bei genügender Aushärtung der Schutzschicht ein Verkleben der Selbstklebeschicht mit der Schutzschicht nicht erfolgt, daß ferner ein einwandfrei verlaufender Druckvorgang auf einem Thermodrucker möglich ist und Rückstände der Selbstklebeschicht auf der Deckschicht, mit der die Selbstklebeschicht auf der Rolle in Kontakt steht, nicht in nennenswertem und den Druckvorgang beeinträchtigendem Umfang auftreten.It has been shown in practice that with sufficient hardening of the protective layer, the self-adhesive layer does not adhere to the protective layer, that a flawless printing process on a thermal printer is also possible, and residues of the self-adhesive layer on the cover layer with which the self-adhesive layer on the roll is in contact, does not occur to any significant extent and may affect the printing process.
Unter dem in Ansprüchen und Beschreibung verwendeten Begriff "aktinische Strahlung" sind UV - oder ionisierende Strahlungen, wie Elektronenstrahlen, zu verstehen. Sofern die Deckschicht mittels UV-Strahlen gehärtet werden soll, müssen die zur Herstellung der Deckschicht verwendeten Monomeren bzw. Prepolymeren in bekannter Weise Zusätze von Initiatoren enthalten. Durch 5The term "actinic radiation" used in claims and description is to be understood as UV or ionizing radiation, such as electron beams. If the top layer is to be hardened by means of UV rays, the monomers or prepolymers used to produce the top layer must contain additives of initiators in a known manner. By 5
Elektronenstrahlhärtung konnte eine über ihren Querschnitt besonders gleichmäßig ausgebildete, d. h. ausgehärtete, Deckschicht erzielt werden.Electron beam hardening was able to achieve a particularly uniform cross-section, i. H. cured top layer can be achieved.
Erfindungsgemäß wird die Ausbildung der Deckschicht mit einer Flächenmasse im Bereich von 0,5 bis 3,5 g/m2 bevorzugt.According to the invention, the formation of the cover layer with a basis weight in the range from 0.5 to 3.5 g / m 2 is preferred.
Es wird bevorzugt, daß die in der Schutzschicht vorliegende und mittels aktini- scher Strahlung ausgehärtete Harzkomponente aus den Monomeren oder Prepolymeren von Acrylat und/oder Methacrylat gebildet ist.It is preferred that the resin component present in the protective layer and hardened by means of actinic radiation is formed from the monomers or prepolymers of acrylate and / or methacrylate.
Neben den bereits bei der Härtung der Deckschicht mittels UV-Strahlen erforderlichen Fotoinitiatoren können in der Deckschicht in untergeordneter Menge Pigmente und Vernetzungshilfsmittel vorliegen; in jedem Fall ist die Deckschicht jedoch frei von silikonhaltigen Verbindungen.In addition to the photoinitiators that are already required when the top layer is hardened by means of UV rays, pigments and crosslinking aids can be present in a minor amount in the top layer; in any case, however, the cover layer is free of silicone-containing compounds.
Unter dem in Beschreibung und Patentansprüchen angegebenen Offsetdruck- verfahren ist das Naßoffsetdruckverfahren zu verstehen. The offset printing process specified in the description and claims is to be understood as the wet offset printing process.

Claims

Patentansprüche claims
1. Verwendung eines wärmeempfindlicheπ Aufzeichnungsmaterials, bestehend aus: b) einem Schichtträger, auf dessen Vorderseite eine wärmeempfindliche Aufzeichnungsschicht, angeordnet ist, die einen Farbstoffvorläufer und einen Farbakzeptor enthält, der bei Kontakt mit dem Farbstoffvorläufer einer Farbbildungsreaktion unterliegt, f) einer zwischen Schichtträger und wärmeempfindlicher Aufzeichnungsschicht angeordneten Zwischenschicht, g) einer die wärmeempfindliche Aufzeichnungsschicht abdeckenden und mittels aktinischer Strahlung gehärteten von silikonhartigen Verbindungen freien Schutzschicht, sowie h) einer auf der Rückseite des Schichtträgers angeordneten Selbstklebeschicht, i) als auf Rolle aufwickelbares und im Offset - oder Flexodruckverfahren zu bedruckendes Etikettenmaterial, bei dem in der Rolle die Selbstklebeschicht mit der Schutzschicht in Kontakt steht.1. Use of a heat-sensitive recording material, consisting of: b) a substrate, on the front of which a heat-sensitive recording layer is arranged, which contains a dye precursor and a color acceptor, which is in contact with the dye precursor undergoes a color-forming reaction, f) one between the substrate and heat-sensitive Intermediate layer arranged on the recording layer, g) a protective layer covering the heat-sensitive recording layer and free of silicone-like compounds by means of actinic radiation, and h) a self-adhesive layer arranged on the back of the substrate, i) as a label material that can be wound up on a roll and printed using the offset or flexographic printing process, in which the self-adhesive layer in the roll is in contact with the protective layer.
2. Verwendung eines wärmeempfindlichen .Aufzeichnungsmaterials nach Anspruch 1 mit einer Schutzschicht, deren mittels aktinischer Strahlung ausgehärtete Harzkomponente aus den Monomeren oder Prepolymeren von Acrylat und/oder Methacrylat gebildet ist. 2. Use of a heat-sensitive. Recording material according to claim 1 with a protective layer, the resin component hardened by means of actinic radiation is formed from the monomers or prepolymers of acrylate and / or methacrylate.
EP99913163A 1998-02-17 1999-02-13 Use of a heat-sensitive recording material as a label Expired - Lifetime EP1056602B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19806433 1998-02-17
DE19806433A DE19806433B4 (en) 1998-02-17 1998-02-17 Use of a heat-sensitive recording material as a label
PCT/EP1999/000964 WO1999042298A1 (en) 1998-02-17 1999-02-13 Use of a heat-sensitive recording material as a label

Publications (2)

Publication Number Publication Date
EP1056602A1 true EP1056602A1 (en) 2000-12-06
EP1056602B1 EP1056602B1 (en) 2002-05-15

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EP99913163A Expired - Lifetime EP1056602B1 (en) 1998-02-17 1999-02-13 Use of a heat-sensitive recording material as a label

Country Status (8)

Country Link
US (1) US6623852B1 (en)
EP (1) EP1056602B1 (en)
JP (1) JP2002503573A (en)
AT (1) ATE217583T1 (en)
DE (2) DE19806433B4 (en)
ES (1) ES2177266T3 (en)
NO (1) NO20000768L (en)
WO (1) WO1999042298A1 (en)

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ES2177266T3 (en) 2002-12-01
JP2002503573A (en) 2002-02-05
DE19806433B4 (en) 2004-11-11
WO1999042298A1 (en) 1999-08-26
DE59901445D1 (en) 2002-06-20
NO20000768L (en) 2000-03-24
EP1056602B1 (en) 2002-05-15
ATE217583T1 (en) 2002-06-15
US6623852B1 (en) 2003-09-23
DE19806433A1 (en) 1999-08-19
NO20000768D0 (en) 2000-02-16

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