EP0283651B1 - Method of making coating layers and films - Google Patents

Method of making coating layers and films Download PDF

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Publication number
EP0283651B1
EP0283651B1 EP88100821A EP88100821A EP0283651B1 EP 0283651 B1 EP0283651 B1 EP 0283651B1 EP 88100821 A EP88100821 A EP 88100821A EP 88100821 A EP88100821 A EP 88100821A EP 0283651 B1 EP0283651 B1 EP 0283651B1
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Prior art keywords
layer
weight
plastic
colour
surface layer
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EP88100821A
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German (de)
French (fr)
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EP0283651A1 (en
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Manfred Dipl.-Ing. Schneider
Heinrich Dr. Dipl.-Ing. Heitz
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Alkor GmbH Kunstoffverkauf
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Alkor GmbH Kunstoffverkauf
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B05D1/286—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers using a temporary backing to which the coating has been applied
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/068—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using ionising radiations (gamma, X, electrons)

Definitions

  • the paint must therefore be processed immediately in the "wet state", so that storage of the layers is not possible.
  • the varnish cannot be printed in a damp state. A possible pressure when squeezing onto the flat material, preferably paper, would change its colors.
  • At least one non-heat-sealable cover layer with a total thickness (measured according to the Hardening or drying) of 2 to 40 microns applied, which contains free reactive chemical groups and color pigments and / or dyes and at least one solvent and / or a diluent of more than 35 wt .-% (based on the total weight of the top layer to be applied) andloder (at room temperature ) has liquid monomers and / or liquid prepolymers, prepolymers or precondensates.
  • a 0.1 to 6 ⁇ m, preferably 0.5 to 4 ⁇ m, thick adhesive layer (measured after curing or drying), the free chemical reactive groups and synthetic resin are first applied to the release film as part of the cover layer , Plastic and / or (at room temperature) liquid monomers and / or liquid prepolymers, prepolymers and / or pre-condensates and / or organic chemical solvents or diluents and thereon as a further part of the top layer one or more color pigment top layers with a total thickness of 1.9 to 30 ⁇ m, preferably 4.5 to 15 pm
  • the invention further relates to a device combination for the production of paint film webs, with the aid of which the paint is first applied to a radiation-permeable plastic film or plastic film web and cured by an irradiation device and separated from the plastic film or plastic film web (plastic release film).

Abstract

A process and an apparatus for the production of printed coated films in which at least one plastic-containing, prepolymer- and/or precondensate-containing, non-heat-sealable outer layer (3) having a total thickness (measured after curing or drying) of from 2 to 40 mu m and containing free reactive chemical groups and coloured pigments and/or dyes and containing at least one solvent and/or diluent of more than 35 % by weight and/or liquid monomers and/or liquid prepolymers or precondensates is applied to a plastic release film (1) at temperatures between 10 DEG C and 90 DEG C, preferably from 20 DEG C to 60 DEG C, and a 10 to 95 mu m thick, transparent or translucent coating (5) having a coloured pigment content of less than 3 % by weight and made from a coating material which can be cured by means of electron beams is applied immediately on top of the outer layer or on top of an intermediate layer arranged above the outer layer, and the coating is cured with exposure to electron beams, and the coated film formed on the release plastic film after curing is peeled off the release plastic film. <IMAGE>

Description

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von Lackschichten oder Lackfolien, wobei Lack zunächst auf eine strahlendurchlässige Kunststoffolie aufgetragen, durch Bestrahlung ausgehärtet und von der Kunststoffreleasefolie (wiederverwendbaren Kunststoffolie) getrennt wird, wobei nach der Erfindung mehrere Schichten bestimmter Zusammensetzung zur Herstellung der bedruckten Lackfolien aufgebracht werden.The present invention relates to a process for the production of lacquer layers or lacquer films, wherein lacquer is first applied to a radiation-permeable plastic film, cured by radiation and separated from the plastic release film (reusable plastic film), with several layers of a specific composition being applied to produce the printed lacquer films according to the invention will.

Aus der EU-A-0 043 063 ist bereits ein Verfahren zur Herstellung einer mit durch Elektronenstrahlen gehärteten, lackbeschichteten Trägerfolie bekannt, wobei auf eine Trägerfolie, vorzugsweise aus Papier, Vlies oder textile Bahnen, ein durch Elektronenstrahlen härtbarer Lack aufgebracht und auf den Lack ein Polyesterfilm aufkaschiert wird. Dieser Schichtstoff wird durch Bestrahlung mit Elektronenstrahlen gehärtet und der Polyesterfilm abgezogen, so daß nach der Bestrahlung und dem Abziehen des Polyesterfilms ein auf einen Träger (Papier, Vlies oder Textil) angeordneter ausgehärteter Lack verbleibt. Bei dem Abziehen des Polyesterfilms besteht die Gefahr der Beschädigung der Lackoberfläche. Die dabei verwendete Trägerfolie stellt keine Releasefolie dar. Weiterhin fehlt auch eine Deckschicht innerhalb dieses Verfahrens.EU-A-0 043 063 already discloses a process for producing a backing film which has been coated with lacquer and has been hardened by electron beams, a lacquer curable by electron beams being applied to a backing film, preferably made of paper, nonwoven or textile webs, and applied to the lacquer Laminated polyester film. This laminate is hardened by irradiation with electron beams and the polyester film is peeled off, so that after the irradiation and peeling of the polyester film there remains a cured lacquer arranged on a support (paper, fleece or textile). When the polyester film is peeled off, there is a risk of damage to the paint surface. The carrier film used is not a release film. Furthermore, a cover layer is also missing within this process.

Aus der DE-OS 2619 315 ist bereits ein Verfahren zum Lackieren von Flachmaterial wie Papieren, Kartons, Blechen und dgl., mit photopolymerisierbaren Lacken bekannt, bei dem Lack in einer Schicht auf das Flachmaterial aufgetragen und durch Bestrahlung mit einer Lichtquelle ausgehärtet wird, wobei der Lack zunächst auf eine für das härtende Licht durchlässige Folie aufgetragen, mit der Folie in Kontakt mit der zu beschichtenden Flachmaterial-Oberfläche gebracht wird und nach dem Bestrahlen durch die Folie hindurch und Aushärten des Lackes die Folie von der Lackschicht abgezogen wird.From DE-OS 2619 315 a method for painting flat material such as paper, cardboard, metal sheets and the like is known, with photopolymerizable lacquers, in which the lacquer is applied in one layer to the flat material and cured by irradiation with a light source, whereby the lacquer is first applied to a film which is permeable to the curing light, is brought into contact with the surface of the flat material to be coated, and after the radiation has been irradiated through the film and the lacquer has hardened, the film is removed from the lacquer layer.

Nachteilig ist dabei, daß in einem Farbauftragswerk der Lack aufgetragen wird und daß anschließend sofort zwischen einem Walzenpaar mit der Lackseite auf das zu beschichtende Flachmaterial aufgequetscht werden muß.The disadvantage here is that the paint is applied in a paint coater and that immediately afterwards it has to be squeezed onto the flat material to be coated between a pair of rollers with the paint side.

Der Lack muß somit im "nassen Zustand" sofort weiterverarbeitet werden, so daß eine Lagerung der Schichten nicht möglich ist. Darüber hinaus kann der Lack nicht zusätzlich in feuchtem Zustand bedruckt werden. Ein evtl. Druck bei der Aufquetschung auf das Flachmaterial, vorzugsweise Papier, würde seine Farben ändern.The paint must therefore be processed immediately in the "wet state", so that storage of the layers is not possible. In addition, the varnish cannot be printed in a damp state. A possible pressure when squeezing onto the flat material, preferably paper, would change its colors.

Diese nicht transparente oder translucente Lackschicht weist keine zusätzliche Deckschicht und keine an der Deckschicht angeordnete Zwischenschicht, vorzugsweise keine Druckschicht auf, so daß die Lackschicht unmittelbar auf das zu beschichtende Flachmaterial aufgebracht werden muß, ohne das eine Zwischenschicht, Deckschicht und/oder Haftschicht zu dem Flachmaterial hin angeordnet ist.This non-transparent or translucent lacquer layer has no additional top layer and no intermediate layer arranged on the top layer, preferably no printing layer, so that the lacquer layer must be applied directly to the flat material to be coated without an intermediate layer, top layer and / or adhesive layer to the flat material is arranged.

Ziel und Aufgabe der vorliegenden Erfindung war es die vorgenannten Nachteile zu vermeiden und ein verbessertes Verfahren und eine Lackfolie mit verbesserten Eigenschaften zu finden. Die aus den flüssigen Beschichtungen hergestellte Schicht sollte leicht von der Trägerfolie trennbar und zwischenlagerbar und mittels Klebstoff oder Haftvermittler auch auf unterschiedliche Substrate oder Gegenstände, vorzugsweise auf Holz oder Holzwerkstoffe, Möbelteile aus Holzwerkstoffen, aufzubringen sein.The aim and object of the present invention was to avoid the aforementioned disadvantages and to find an improved method and a paint film with improved properties. The layer produced from the liquid coatings should be easily separable from the carrier film and temporarily storable and should also be able to be applied to different substrates or objects, preferably to wood or wood-based materials, furniture parts made from wood-based materials, by means of an adhesive or adhesion promoter.

Erfindungsgemäß wurde festgestellt, daß diesen Zielen und Aufgaben ein Verfahren zur Herstellung von Lackschichten oder Lackfolien sowie eine Lackfolie selbst gerecht werden. Gemäß dem erfindungsgemäßen Verfahren wird auf eine Kunststoffreleasefolie (wiederverwendbaren Kunststoffolie) bei Temperaturen zwischen 10 °C bis 90 °C, mindestens eine, aus einer oder mehreren kunstharz-, kunststoffhaltigen, vorpolymerisat-undladervorkondensathaltigen Schichten bestehende nicht heißsiegelfähige Deckschicht mit einer Gesamtdicke (gemessen nach der Aushärtung oder Trocknung) von 2 bis 40 µm aufgebracht, die freie reaktive chemische Gruppen und Farbpigmente undloder Farbstoffe enthält und mindestens ein Lösungsmittel- undloder ein Verdünnungsmittel von mehr als 35 Gew.-% (bezogen auf das Gesamtgewicht der aufzubringenden Deckschicht) undloder (bei Raumtemperatur) flüssige Monomere und/oder flüssige Prepolymere, Vorpolymerisate oder Vorkondensate aufweist. Über einer oberhalb der Deckschicht angeordneten Zwischenschicht, vorzugsweise einer Druckschicht oder Farbdruckschicht wird mit einer Gesamtdicke von 0,5 bis 12 pm, eine 10 bis 95 µm dicke, transparente oder translucente Lackschicht mit einem Farbpigmentgehalt unter 3 Gew.-%, vorzugsweise ohne Farbpigmente, aus einem mit Elektronenstrahlen härtbaren Lack aufgebracht, die Lackschicht unter Einwirkung der Elekronenstrahlen gehärtet und die auf der Releasekunststoffolie nach der Härtung gebildete Lackfolie von der Releasekunststoffolie abgezogen.According to the invention, it was found that a process for the production of lacquer layers or lacquer films and a lacquer film itself do justice to these objectives and tasks. According to the method according to the invention, at least one non-heat-sealable cover layer with a total thickness (measured according to the Hardening or drying) of 2 to 40 microns applied, which contains free reactive chemical groups and color pigments and / or dyes and at least one solvent and / or a diluent of more than 35 wt .-% (based on the total weight of the top layer to be applied) andloder (at room temperature ) has liquid monomers and / or liquid prepolymers, prepolymers or precondensates. A 10 to 95 μm thick, transparent or translucent lacquer layer with a color pigment content of less than 3% by weight, preferably without color pigments, is applied over an intermediate layer, preferably a printing layer or color printing layer, with a total thickness of 0.5 to 12 pm. applied from a lacquer curable with electron beams, the lacquer layer hardened under the action of the electron beams and the lacquer film formed on the release plastic film after the curing is peeled off from the release plastic film.

Nach einer vorzugsweisen Ausführungsform des erfindungsgemäßen Verfahrens wird auf die Kunststoffreleasefolie bei Temperaturen zwischen 20 °C bis 60 °C, mindestens eine, aus einer oder mehreren kunstharz-, kunststoffhaltigen, vorpolymerisat- und/odervorkondensathaltigen Schichten bestehende nicht heißsiegelfähige Deckschicht mit einer Gesamtdicke (gemessen nach derAushärtung oder Trocknung) von 5 bis 15 µm, die freie reaktive chemische Gruppen und Farbpigmente und/oder Farbstoffe enthält und mindestens ein Lösungsmittel- undloder ein Verdünnungsmittel von mehr als 35 Gew.-% (bezogen auf das Gesamtgewicht der aufzubringenden Deckschicht) und/oder (bei Raumtemperatur) flüssige Monomere undloderflüssige Prepolymere, Vorpolymerisate oder Vorkondensate aufweist, und übereineroberhalb der Deckschicht angeordneten Zwischen schicht, vorzugsweise einer Druckschicht oder Farbdruckschicht, mit einer Gesamtdicke von 1 bis 5 pm, eine 30 bis 50 pm dicke, transparente oder translucente Lackschicht mit einem Farbpigmentgehalt unter 3 Gew.-%, vorzugsweise ohne Farbpigmente, aus einem mit Elektronenstrahlen härtbaren Lack aufgebracht, die Lackschicht unter Einwirkung der Elekronenstrahlen gehärtet und die auf der Releasekunststoffolie nach der Härtung gebildete Lackfolie von der Releasekunststoffolie abgezogen.According to a preferred embodiment of the method according to the invention, at least one non-heat-sealable top layer with a total thickness (measured according to.) Consisting of one or more layers containing synthetic resin, plastic, prepolymer and / or pre-condensate is applied to the plastic release film at temperatures between 20 ° C. to 60 ° C. the curing or drying) of 5 to 15 μm, which contains free reactive chemical groups and color pigments and / or dyes and at least one solvent and / or diluent of more than 35% by weight (based on the Total weight of the top layer to be applied) and / or (at room temperature) liquid monomers and / or liquid prepolymers, prepolymers or pre-condensates, and above an intermediate layer arranged above the top layer, preferably a printing layer or color printing layer, with a total thickness of 1 to 5 pm, a 30 to 50 pm thick, transparent or translucent lacquer layer with a color pigment content of less than 3% by weight, preferably without color pigments, applied from a lacquer curable with electron beams, the lacquer layer hardened under the action of the electron beams and the lacquer film formed on the release plastic film after the curing is peeled off from the release plastic film.

Nach einer weiteren bevorzugten Ausführungsform des erfindungsgemäßen Verfahrens werden auf die Releasefolie als Teil der Deckschicht zunächst eine 0,1 bis 6 µm, vorzugsweise 0,5 bis 4 µm, dicke Haftschicht (gemessen nach derAushärtung oder Trocknung), die freie chemische reaktive Gruppen und Kunstharz, Kunststoff undloder (bei Raumtemperatur) flüssige Monomere undloder flüssige Prepolymere, Vorpolymerisate und/oder Vorkondensate und/oder organisch-chemische Lösungsmittel oder Verdünnungsmittel enthält und darauf als weitererTeil der Deckschicht eine oder mehrere Farbpigmentdeckschichten mit einer Gesamtdicke von 1,9 bis 30 µm, vorzugsweise 4,5 bis 15 pm, aufgebrachtAccording to a further preferred embodiment of the method according to the invention, a 0.1 to 6 µm, preferably 0.5 to 4 µm, thick adhesive layer (measured after curing or drying), the free chemical reactive groups and synthetic resin are first applied to the release film as part of the cover layer , Plastic and / or (at room temperature) liquid monomers and / or liquid prepolymers, prepolymers and / or pre-condensates and / or organic chemical solvents or diluents and thereon as a further part of the top layer one or more color pigment top layers with a total thickness of 1.9 to 30 µm, preferably 4.5 to 15 pm

Die Einwirkung von Elektronenstrahlen erfolgt bevorzugt durch die Releasekunststoffschicht hindurch (also von der Gegenseite der Lackschicht her). Die Schichten dürfen daher vorzugsweise keine Metallschichten oder Metallisierungen enthalten.The action of electron beams preferably takes place through the release plastic layer (ie from the opposite side of the lacquer layer). The layers may therefore preferably not contain any metal layers or metallizations.

Nach einer bevorzugten Ausführungsform des erfindungsgemäßen Verfahrens besteht die Haftschicht aus Polyisocyanaten, vorzugsweise Polyisocyanat von Hexamethylendiisocyanat, und hydroxy- und/oder amingruppenhaltigen Harzen, Vorkondensaten und/oder Vorpolymerisaten in flüssiger Form, vorzugsweise Hexamethoxymethylmelaminharz, und/oder hydroxylgruppenhaltiges Polyacrylat und/oder Polymethacrylat und/oder Vinylchloridcopolymerisat oder enthält eines oder mehrere dieser Verbindungen als Hauptbestandteil.According to a preferred embodiment of the process according to the invention, the adhesive layer consists of polyisocyanates, preferably polyisocyanate of hexamethylene diisocyanate, and hydroxyl and / or amine group-containing resins, precondensates and / or prepolymers in liquid form, preferably hexamethoxymethylmelamine resin, and / or hydroxyl group-containing polyacrylate and / or polymethacrylate and / / or vinyl chloride copolymer or contains one or more of these compounds as the main constituent.

Die Farbpigmentschicht(en), die auf die Haftschicht aufgetragen wird bzw. werden, weist oder weisen einen Verdünnungsmittel- und/oder Lösungsmittelgehalt, vorzugsweisen einen Gehalt von organisch-chemischen Lösungsmitteln, von 40 bis 70 Gew.-%, vorzugsweise 50 bis 66 Gew.-%, und einen Festkörpergehalt, bestehend aus Farbpigmenten und/oder Farbstoffen und Kunstharzbindemitteln, sowie ggf. Verarbeitungshilfsmitteln von 60 bis 30 Gew.-%, vorzugsweise 50 bis 34 Gew.-% auf. Das Verdünnungsmittel oder Lösungsmittel wird nach dem Aufbringen durch Wärmeeinwirkung zu mehr als 30 Gew.-%, vorzugsweise mehr als 50 Gew.-% (bezogen auf 100 Gew.-% enthaltendes Verdünnungs- oder Lösungsmittel) entfernt, vorzugsweise bevor eine weitere Schicht darüber aufgetragen wird.The color pigment layer (s) which is or are applied to the adhesive layer has or have a diluent and / or solvent content, preferably an organic chemical solvent content, of 40 to 70% by weight, preferably 50 to 66% by weight .-%, and a solids content consisting of color pigments and / or dyes and synthetic resin binders, and optionally processing aids of 60 to 30 wt .-%, preferably 50 to 34 wt .-%. The diluent or solvent is removed after application by the action of heat to more than 30% by weight, preferably more than 50% by weight (based on 100% by weight of diluent or solvent), preferably before another layer is applied over it becomes.

Nach einer bevorzugten Ausführungsform des erfindungsgemäßen Verfahrens besteht bzw. bestehen die Farbpigmentdeckschicht(en), die auf die Haftschicht aufgetragen wird bzw. werden, aus flüssigen Monomeren, Vorkondensaten und/oder flüssigen Prepolymeren, vorzugsweise einem Gemisch von flüssigen Monomeren mit flüssigen Prepolymeren, mit einem geringen Lösungsmittelgehalt und/oder Verdünnungsmittelgehalt, vorzugsweise ohne Lösungs- und Verdünnungsmittel, mit einem Gesamtgewicht von 90 bis 30 Gew.-%, vorzugsweise 80 bis 50 Gew.-%, und Farbpigmenten und/oder Farbstoffen, sowie ggf. Verarbeitungshilfsmitteln in Gewichtsmengen von 10 bis 70 Gew.-%, vorzugsweise 20 bis 50 Gew.-%.According to a preferred embodiment of the method according to the invention, the color pigment top layer (s) which is or are applied to the adhesive layer consist of liquid monomers, precondensates and / or liquid prepolymers, preferably a mixture of liquid monomers with liquid prepolymers, with a low solvent content and / or diluent content, preferably without solvents and diluents, with a total weight of 90 to 30% by weight, preferably 80 to 50% by weight, and color pigments and / or dyes, and optionally processing aids in amounts by weight of 10 to 70% by weight, preferably 20 to 50% by weight.

Nach einerweiteren bevorzugten Ausführungsform besteht oder bestehen die Farbpigmentdeckschicht oder Farbpigmentdeckschichten aus 10 bis 70 Gew.-%, vorzugsweise 20 bis 50 Gew.-%, Farbpigmenten und/oder Farbstoffen und 90 bis 30 Gew.-%, vorzugsweise 80 bis 50 Gew.-%, Kunstharzbindemitteln oder deren Ausgangsbestandteile in Form der Monomeren, Vorkondensate undloder Prepolymeren (gerechnet als Festkörper), bezogen auf den Gesamtfestkörpergehalt der Farbpigmentdeckschicht(en).According to a further preferred embodiment, the color pigment top layer or color pigment top layers consist of 10 to 70% by weight, preferably 20 to 50% by weight, color pigments and / or dyes and 90 to 30% by weight, preferably 80 to 50% by weight. %, Synthetic resin binders or their starting constituents in the form of the monomers, precondensates and / or prepolymers (calculated as solids), based on the total solids content of the color pigment top layer (s).

Nach einer bevorzugten Ausführungsform des Verfahrens wird die nasse Lackschicht über eine glatte oder eine strukturierte Walze, vorzugsweise mattierte Strukturwalze, ausgehärtet, wobei die Struktur und/oder die Mattierung von der Lackschicht übemommen wird.According to a preferred embodiment of the method, the wet lacquer layer is cured via a smooth or a structured roller, preferably a matted structure roller, the structure and / or the matting being carried out by the lacquer layer.

Die Kunststoffreleasefolie oder die -bahn besteht aus oder enthält bevorzugt Fluorpolymere, Polyolefin, Polybutylenterephthalat und/oder Polyethylenterephthalat usw., vorzugsweise Polyvinylidenfluorid, Polytetrafluorethylen undloder Polyethylen.The plastic release film or web consists of or preferably contains fluoropolymers, polyolefin, polybutylene terephthalate and / or polyethylene terephthalate, etc., preferably polyvinylidene fluoride, polytetrafluoroethylene and / or polyethylene.

Das Kunstharzbindemittel der Farbpigmentdeckschicht besteht vorzugsweise aus Vinylchloridcopolymerisaten, Vinylchlorid-Acrylatcopolymeren, Nitrocellulose mit Maleinat- oder Ketonharz, Nitrocellulose mit Acrylatharzen und/oder Methacrylatharzen, vorzugsweise Acrylatharz.The synthetic resin binder of the color pigment top layer preferably consists of vinyl chloride copolymers, vinyl chloride-acrylate copolymers, nitrocellulose with maleate or ketone resin, nitrocellulose with acrylate resins and / or methacrylate resins, preferably acrylate resin.

Die transparente oder translucente Lackschicht besteht oder enthält als Kunststoffbindemittel kationisch härtende Harze, vorzugsweise Epoxidharze, Vinyläther und/oder Vinylesterpolymerisate, -copolymerisate und/oder zu Harzen radikalisch härtende Monomere, Prepolymere, Vorkondensate, vorzugsweise Monomere oder Prepolymere von Acrylaten und/oder Methacrylaten, oder Mischungen von zwei oder mehreren Harzen untereinander oder Gemische mit einem oder mehrere dieser Harze.The transparent or translucent lacquer layer consists or contains, as a plastic binder, cationically curing resins, preferably epoxy resins, vinyl ethers and / or vinyl ester polymers, copolymers and / or monomers free-radically curing to resins, prepolymers, precondensates, preferably monomers or prepolymers of acrylates and / or methacrylates, or Mixtures of two or more resins with one another or mixtures with one or more of these resins.

Die Bestrahlung kann bei Vorhandensein der unterschiedlichsten Gase bei kationisch härtbaren Harzen erfolgen, vorzugsweise Luft oder Sauerstoff. Eine Bestrahlung unter spezieller Verwendung eines inerten Gases oder einer inerten Atmosphäre ist dabei nicht erforderlich und wird bevorzugt vermieden. Ebenso braucht die Einwirkung der Strahlung nicht bei abwechselnd unterschiedlichen Gaszusammensetzungen zu erfolgen. Bei den radikalisch aushärtbaren Harzen erfolgt die Aushärtung durch Bestrahlung, vorzugsweise unter Verwendung oder Mitverwendung inerter Gase, vorzugsweise in Stickstoffatmosphäre.Irradiation can take place in the presence of a wide variety of gases in the case of cationically curable resins, preferably air or oxygen. Irradiation with the special use of an inert gas or an inert atmosphere is not necessary and is preferably avoided. Likewise, the action of the radiation need not take place with alternating gas compositions. In the case of the radically curable resins, curing takes place by irradiation, preferably using or using inert gases, preferably in a nitrogen atmosphere.

Die Strahlung sind Beta-Strahlen bzw. Elektronenstrahlen, die von der Strahlungsquelle in einem Elektronenbeschleuniger beschleunigt und vorzugsweise über Linear- und/oder Flächenkathoden auf das Substrat geleitet werden. Die Beschleunigungsspannung beträgt 150 - 500 KV, vorzugsweise 200 - 300 KV.The radiation is beta rays or electron beams, which are accelerated by the radiation source in an electron accelerator and are preferably guided onto the substrate via linear and / or surface cathodes. The acceleration voltage is 150 - 500 KV, preferably 200 - 300 KV.

Die Erfindung betrifft weiterhin bedruckte Folien, bestehend aus mehreren kunststoff- oder kunstharzhaltigen Schichten, wobei die Folie eine Lackfolie ist, die aus mindestens einer, aus einer oder mehreren kunstharz- oder kunststoffhaltigen Schichten bestehenden nicht heißsiegelbaren Deckschicht mit einer Gesamtdicke (gemessen nach der Aushärtung oder Trocknung) von 2 bis 40 µm, vorzugsweise 5 bis 15 µm, die freie reaktive chemische Gruppen und Farbpigmente undloder Farbstoffe enthält, einer oberhalb der Deckschicht angeordneten Druckschicht, vorzugsweise Farbdruckschicht, mit einer Gesamtdikke von 0,5 bis 12 µm, vorzugsweise 1,0 bis 5 µm (gemessen nach der Aushärtung oder Trocknung), und einer darüber angeordneten 10 bis 95 pm, vorzugsweise 30 bis 50 µm, dicken, transparenten oder translucenten Lackschicht mit einem Farbpigmentgehalt unter 3 Gew.-%, vorzugsweise ohne Farbpigmente, bestehend oder enthaltend einen mit Elektronenstrahlen gehärteten, vorzugsweise mit Betastrahlen gehärteten Lack, zusammengesetzt istThe invention further relates to printed films consisting of a plurality of layers containing plastic or synthetic resin, the film being a lacquer film which consists of at least one non-heat-sealable top layer consisting of one or more synthetic resin or plastic-containing layers with a total thickness (measured after curing or Drying) of 2 to 40 μm, preferably 5 to 15 μm, which contains free reactive chemical groups and color pigments and / or dyes, a printing layer arranged above the top layer, preferably a color printing layer, with a total thickness of 0.5 to 12 μm, preferably 1.0 up to 5 μm (measured after curing or drying), and a 10 to 95 μm, preferably 30 to 50 μm, thick, transparent or translucent lacquer layer arranged thereon with a color pigment content of less than 3% by weight, preferably without color pigments, consisting of or containing one hardened with electron beams, preferably with beta beam en hardened lacquer, is composed

Als untere Schicht, als Bestandteil der Deckschicht, enthält die bedruckte Folie nach einervorzugsweisen Ausführungsform eine 0,1 bis 6 µm, vorzugsweise 0,5 bis 4 J.1m, dicke Haftschicht (gemessen nach der Aushärtung oder Trocknung), die freie chemische reaktive Gruppen und Kunstharz oder Kunststoff enthält Darauf sind als weiterer Teil der Deckschicht eine oder mehrere Farbpigmentdeckschichten mit einer Gesamtdicke von 1,9 bis 30 µm, vorzugsweise 4,5 bis 15 µm, angeordnet.As a lower layer, as a component of the cover layer, the printed film according to a preferred embodiment contains a 0.1 to 6 µm, preferably 0.5 to 4 J.1m, thick adhesive layer (measured after curing or drying), the free chemical reactive groups and synthetic resin or plastic contains thereon, as a further part of the cover layer, one or more color pigment cover layers with a total thickness of 1.9 to 30 μm, preferably 4.5 to 15 μm, are arranged.

Die Farbpigmentdeckschicht oder Farbpigmentdeckschichten bestehen nach einer bevorzugten Ausführungsform aus 10 bis 70 Gew.-%, vorzugsweise 20 bis 50 Gew.-%, Farbpigmenten und/oder Farbstoffen und 90 bis 30 Gew.-%, vorzugsweise 80 bis 50 Gew.-%, Kunstharzbindemitteln (gerechnet als Festkörper), bezogen auf den Gesamtfestkörpergehalt der Farbpigmentdeckschicht(en).According to a preferred embodiment, the color pigment top layer or color pigment top layers consist of 10 to 70% by weight, preferably 20 to 50% by weight, color pigments and / or dyes and 90 to 30% by weight, preferably 80 to 50% by weight, Resin binders (calculated as solids), based on the total solids content of the color pigment top layer (s).

Die Erfindung betrifft weiterhin eine Vorrichtungskombination zur Herstellung von Lackfolienbahnen, mit Hilfe deren der Lack zunächst auf eine strahlendurchlässige Kunststoffolie oder Kunststoffolienbahn aufgetragen und durch eine Bestrahlungsvorrichtung ausgehärtet und von der Kunststoffolie oder Kunststoffolienbahn (Kunststoffreleasefolie) getrennt wird. Die Vorrichtungskombination besteht aus einer Abwicklungsvorrichtung für die Kunststoffreleasefolie oder -folienbahn, mindestens einem danach angeordneten Druckwalzenpaar oder Druckwerk zum Aufbringen einer Haftschicht, mindestens einem danach angeordneten Druckwalzenpaar oder Druckwalzwerk zum Aufbringen der Deckschicht, mindestens einem, vorzugsweisen mehreren danach angeordneten Druckwalzenpaaren oder Druckwalzwerken zum Aufbringen mindestens einer Druckschicht, mindestens einem danach angeordneten Lackierwerk zum Aufbringen einer transparenten oder translucenten Lackschicht, mindestens einem danach angeordneten Elektronenstrahler oder einer Elektronenstrahlvorrichtung, mindestens einer Aufwikkelvorrichtung für die Releasefolie und mindestens einer Aufwickelvorrichtung für die fertiggestellte Lackfolie oder Lackfolienbahn.The invention further relates to a device combination for the production of paint film webs, with the aid of which the paint is first applied to a radiation-permeable plastic film or plastic film web and cured by an irradiation device and separated from the plastic film or plastic film web (plastic release film). The device combination consists of an unwinding device for the plastic release film or film web, at least one printing roller pair or printing unit arranged thereafter for applying an adhesive layer, at least one printing roller pair or printing roller unit arranged thereafter for applying the top layer, at least one, preferably a plurality of printing roller pairs or printing roller units arranged thereafter for application at least a printing layer, at least one coating unit arranged thereafter for applying a transparent or translucent coating layer, at least one electron emitter or an electron beam device arranged thereafter, at least one winding device for the release film and at least one winding device for the finished lacquer film or film web.

Figurenbeschreibung :Figure description:

In den beigefügten Figuren 1 und 2 sind Ausführungsbeispiele der Erfindung schematisch dargestellt Unter Figur 1 ist ein Querschnitt durch die auf einer Releasefolie (1) angeordneten Lackschicht abgebildet. Die Kunststoffreleasefolie (1) steht mit der Haftschicht (2) und diese mit der Deckschicht (3) in Verbindung. Auf der Deckschicht sind ein oder mehrere Druckschichten (4) angeordnet, die von der transparenten oder translucenten Lackschicht (5) überdeckt sind.Exemplary embodiments of the invention are shown schematically in the attached FIGS. 1 and 2. FIG. 1 shows a cross section through the lacquer layer arranged on a release film (1). The plastic release film (1) is connected to the adhesive layer (2) and this to the cover layer (3). One or more printing layers (4) are arranged on the cover layer and are covered by the transparent or translucent lacquer layer (5).

In Figur 2 ist die erfindungsgemäße Vorrichtung bzw. Vorrichtungskombination schematisch dargestellt.In Figure 2, the device or device combination according to the invention is shown schematically.

Die Kunststoffreleasefolie (1) gelangt von der Abwicklungsvorrichtung (6) für die Releasefolie zu dem Druckwerk oder Druckwalzenpaar (7), das zur Aufbringung der Haftschicht (2) dient, und nachfolgend zu dem Druckwerk oder Druckwalzenpaar (9), das zur Aufbringung der Deckschicht (3) auf die mit der Haftschicht (2) versehene Releasefolie (1) bestimmt ist.The plastic release film (1) passes from the unwinding device (6) for the release film to the printing unit or pair of printing rollers (7), which is used to apply the adhesive layer (2), and subsequently to the printing unit or pair of printing rollers (9), which is used to apply the cover layer (3) is intended for the release film (1) provided with the adhesive layer (2).

Zum Aufbringen von Druckschichten (4), insbesondere mehrfarbigen Druckschichten, werden bevorzugt mehrere Druckwerke oder Druckwalzenpaare (9 bis 12) angeordnet, mit Hilfe deren auf die Deckschicht die Druckschicht oder Druckschichten aufgebracht werden. Die so beschichtete und bedruckte Kunststoffolie oder Kunststoffolienbahn gelangt danach zu den Elektronenstrahler(n) oder der Elektronenbestrahlungsvorrichtung (13), wird nach der Bestrahlung so getrennt, daß die Releasefolie (I) zurAufwicklungsvonichtung (15) für die Releasefolie oder zu der Station (6 oder 7) gelangt, während die von der Releasefolie abgetrennte Lackfolie von der Aufwickelvorrichtung (16) aufgenommen oder in Folienbahnen bestimmter Länge geschnitten wird.To apply printing layers (4), in particular multicolor printing layers, a plurality of printing units or pairs of printing rollers (9 to 12) are preferably arranged, by means of which the printing layer or layers are applied to the cover layer. The so coated and printed Plastic film or plastic film web then reaches the electron emitter (s) or the electron irradiation device (13), is separated after the irradiation so that the release film (I) reaches the winding device (15) for the release film or to the station (6 or 7) while the lacquer film separated from the release film is taken up by the winding device (16) or cut into film webs of a certain length.

Ausführungsbeispiel :Design example:

Auf eine Kunststoff-Releasefolie, vorzugsweise eine Polyolefinfolie, wurden bei Temperaturen zwischen 20-80 °C Schichten mitfolgender Zusammensetzung aufgebracht und von der Releasefolie als Lackfolie abgetrennt:

Figure imgb0001
Figure imgb0002
 Layers of the following composition were applied to a plastic release film, preferably a polyolefin film, at temperatures between 20-80 ° C. and separated from the release film as a lacquer film:
Figure imgb0001
Figure imgb0002

Claims (13)

1. Method for producing coating layers or coating films, in which at least one surface layer which cannot be heat-sealed and which consists of one or more synthetic resin-containing, plastic-containing, partially polymerised material-containing and/or precondensate-containing layers is applied to a plastic release film (reusable plastic film) at temperatures between
Figure imgb0043
with a total thickness (measured after hardening or drying) of
Figure imgb0044
which contains free reactive chemical groups and colour pigments and/or dyes and has at least one solvent and/or a diluent of more than 35% by weight (relative to the total weight of the surface layer to be applied) and/or liquid (at room temperature) monomers and/or liquid prepolymers, partially polymerised materials or precondensates and a
Figure imgb0045
thick, transparent or translucent coating layer having a colour pigment content of less than 3% by weight, preferably without colour pigments, of a coating which can be hardened with electron beams is applied over an intermediate layer, preferably a printed layer or printed colour layer, arranged above the surface layer and having a total thickness of
Figure imgb0046
and the coating layer is hardened under the action of the electron beams and the coating film formed on the plastic release film after hardening is pulled off the plastic release film.
2. Process according to Claim 1, characterised in that at least one surface layer which cannot be heat-sealed and which consists of one or more synthetic resin-containing, plastic-containing, partially polymerised material-containing and/or precondensate-containing layers onto a plastic release film (reusable plastic film) at temperatures between
Figure imgb0047
with a total thickness (measured after hardening or drying) of
Figure imgb0048
which contains free reactive chemical groups and colour pigments and/or dyes and has at least one solvent and/or a diluent of more than 35% by weight (relative to the total weight of the surface layer to be applied) and/or liquid (at room temperature) monomers and/or liquid prepolymers, partially polymerised materials or precondensates, and a
Figure imgb0049
thick, transparent or translucent coating layer with a colour pigment content of less than 3% by weight, preferably without colour pigments, of a coating which can be hardened with electron beams is applied over an intermediate layer, preferably a printed layer or printed colour layer, arranged above the surface layer, with a total thickness of
Figure imgb0050
and the coating layer is hardened under the action of the electron beams and the coating film formed on the plastic release film after hardening is pulled off the plastic release film.
3. Process according to Claims 1 and 2, characterised in that first of all as part of the surface layer an adhesive layer
Figure imgb0051
preferably
Figure imgb0052
thick (measured after hardening or drying) and containing free reactive chemical groups and synthetic resin, plastic and/or liquid (at room temperature) monomers and/or liquid prepolymers, partially polymerised materials and/or precondensates and/or organic-chemical solvents or diluents and thereon one or more colour pigment surface layers having a total thickness of
Figure imgb0053
preferably
Figure imgb0054
are applied to the release film as another part of the surface layer.
4. Process according to one or more of Claims 1 to 3, characterised in that the action of electron beams takes place through the plastic release layer (hence from the opposite side of the coating layer).
5. Process according to one or more of Claims 1 to 4, characterised in that the adhesive layer consists of polyisocyanates, preferably the polyisocyanate of hexamethylene diisocyanate, and hydroxy-containing and/or amine group-containing resins, precondensates and/or partially polymerised materials in liquid form, preferably hexamethoxymethylmelamine resin, and/or hydroxyl group-containing polyacrylate and/or polymethacrylate and/or vinyl chloride copolymer or contains one or more of these compounds as a main constituent.
6. Process according to one or more of Claims 1 to 5, characterised in that the colour pigment surface layer(s) which is or are applied to the adhesive layer has or have a diluent and/or solvent content, preferably a content of organic-chemical solvents, of
Figure imgb0055
preferably
Figure imgb0056
and a solids content, consisting of colour pigments and/or dyes and synthetic resin binding agents, and also optionally processing aids, of
Figure imgb0057
weight, preferably
Figure imgb0058
by weight, and
Figure imgb0059
by weight, preferably
Figure imgb0060
50% by weight, (relative to diluent or solvent containing 100% byweight) of the diluent or solvent is removed after application by the action of heat before another layer is applied thereover.
7. Process according to one or more of Claims 1 to 6, characterised in that the colour pigment surface layer(s) which is or are applied to the adhesive layer consist(s) of liquid monomers, precondensates and/or liquid prepolymers, preferably a mixture of liquid monomers with liquid prepolymers, with a low solvent content and/or diluent content, preferably without solvent and diluent, with a total weight of
Figure imgb0061
by weight, preferably
Figure imgb0062
by weight, and colour pigments and/or dyes, and also optionally processing aids in quantities of weight of
Figure imgb0063
by weight, preferably
Figure imgb0064
by weight
8. Process according to one or more of Claims 1 to 7, characterised in that the colour pigment surface layer or colour pigment surface layers consist(s) of
Figure imgb0065
by weight, preferably
Figure imgb0066
by weight, colour pigments and/or dyes and
Figure imgb0067
by weight, preferably
Figure imgb0068
by weight, synthetic resin binding agents or their starting constituents in the form of the monomers, precondensates and/or prepolymers (calculated as solids), relative to the total solids content of the colour pigment surface layer(s).
9. Process according to one or more of Claims 1 to 8, characterised in that the wet coating layer is hardened via a smooth roller or a structure roller, preferably delustred structure roller.
10. Printed films, consisting of a plurality of plastic-containing or synthetic resin-containing layers, which are composed of at least one surface layer which cannot be heat-sealed consisting of one or more synthetic resin-containing or plastic-containing layers and having a total thickness (measured after hardening or drying) of
Figure imgb0069
µm, preferably
Figure imgb0070
which contains free reactive chemical groups and colour pigments and/or dyes, of a printed layer, preferably printed colour layer, arranged above the surface layer with a total thickness of
Figure imgb0071
preferably
Figure imgb0072
(measured after hardening or drying) and a transparent or translucent coating layer
Figure imgb0073
preferably
Figure imgb0074
thick arranged thereover with a colour pigment content of less than 3% by weight, preferably without colour pigments, or containing a painted coating hardened with electron beams, preferably hardened with beta rays.
11. Printed films according to Claim 10, characterised in that an adhesive layer
Figure imgb0075
preferably
Figure imgb0076
thick (measured after hardening or drying) which contains free chemical reactive groups and synthetic resin or plastic as the lower layer of the surface layer and one or more colour pigment surface layers having a total thickness of
Figure imgb0077
pm, preferably
Figure imgb0078
 Am, are arranged thereon as another part of the surface layer.
12. Printed films according to Claims 10 and 11, characterised in that the colour pigment surface layer or colour pigment surface layers consist(s) of
Figure imgb0079
Figure imgb0080
colour pigments and/or dyes and
Figure imgb0081
by weight, preferably
Figure imgb0082
, by weight, synthetic resin binding agents (calculated as solids) relative to the total solids content of the colour pigment surface layer(s).
13. Apparatus combination for producing coated film webs, consisting of a combination of an unwinding device for the plastic release film or film web, at least one subsequent pair of printing rollers or printing unit for applying an adhesive layer, at least one subsequent pair of printing rollers or printing roller unit for applying the surface layer, at least one, preferably several, subsequent pairs of printing rollers or printing roller units for applying at least one printed layer, at least one subsequent coating machine for applying a transparent or translucent coating layer, at least one subsequent electron gun or an electron beam device, at least one winding device for the release film and at least one winding device for the finished coated film or coated film web.
EP88100821A 1987-03-19 1988-01-21 Method of making coating layers and films Expired - Lifetime EP0283651B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88100821T ATE59590T1 (en) 1987-03-19 1988-01-21 PROCESSES FOR THE MANUFACTURE OF PAINT COATINGS AND PAINT FOILS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3708908 1987-03-19
DE19873708908 DE3708908A1 (en) 1987-03-19 1987-03-19 METHOD FOR PRODUCING LACQUER LAYERS AND LACQUER FILMS

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Publication Number Publication Date
EP0283651A1 EP0283651A1 (en) 1988-09-28
EP0283651B1 true EP0283651B1 (en) 1991-01-02

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AT (1) ATE59590T1 (en)
DE (2) DE3708908A1 (en)
ES (1) ES2019409B3 (en)

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Publication number Priority date Publication date Assignee Title
DE4425792A1 (en) * 1994-07-21 1996-02-01 Manfred Keppeler Sheet, films and coatings prodn. with micro-porous, etc. structures
DE19535934C2 (en) 1995-09-27 2002-11-07 Basf Coatings Ag Adhesive paint film
DE19535935A1 (en) * 1995-09-27 1997-04-03 Basf Lacke & Farben Radiation-curable coating
DE19751607B4 (en) * 1997-11-21 2010-01-14 Usp Indicator Solutions Gmbh Protective film for protecting and framing graphic images and methods for their production
DE10057107C1 (en) * 2000-11-16 2002-06-20 Rohrscheidt Friedrich Von Method for printing or embossing or manufacturing a flexible material, e.g. a synthetic leather, uses two or more coating steps performed on a conveyor belt with a surface fitted with release film comprising e.g. cellulose acetate

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0009885B1 (en) * 1978-09-01 1983-11-02 Mobil Oil Corporation Method for applying coatings to substrates
DE3024582A1 (en) * 1980-06-28 1982-01-21 Letron GmbH, 8750 Aschaffenburg METHOD FOR PRODUCING A CARRIER FILM COATED WITH ELECTRON BEAMS
JPS59189969A (en) * 1983-04-12 1984-10-27 Fuji Photo Film Co Ltd Formation of multilayered coating film
GB2142279B (en) * 1983-06-30 1987-04-23 Letraset International Ltd Dry transfer materials
EP0228671A1 (en) * 1985-12-23 1987-07-15 General Electric Company Method for the production of a coated substrate with controlled surface characteristics

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ES2019409B3 (en) 1991-06-16
EP0283651A1 (en) 1988-09-28
DE3861335D1 (en) 1991-02-07
ATE59590T1 (en) 1991-01-15

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