EP2921312B1 - Method for producing a multilayered printed sheet of film - Google Patents

Method for producing a multilayered printed sheet of film Download PDF

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Publication number
EP2921312B1
EP2921312B1 EP15159724.2A EP15159724A EP2921312B1 EP 2921312 B1 EP2921312 B1 EP 2921312B1 EP 15159724 A EP15159724 A EP 15159724A EP 2921312 B1 EP2921312 B1 EP 2921312B1
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Prior art keywords
layer
film
film layer
printing
pattern
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EP15159724.2A
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German (de)
French (fr)
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EP2921312A1 (en
Inventor
Ralf Imbery
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Konrad Hornschuch AG
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Konrad Hornschuch AG
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Priority to PL15159724T priority Critical patent/PL2921312T3/en
Publication of EP2921312A1 publication Critical patent/EP2921312A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/10—Intaglio printing ; Gravure printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/18—Curved printing formes or printing cylinders
    • B41C1/184—Curved printing formes or printing cylinders by transfer of the design to the cylinder, e.g. from a lithographic printing plate; by drawing the pattern on the cylinder; by direct cutting of the pattern on the cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/26—Printing on other surfaces than ordinary paper
    • B41M1/30—Printing on other surfaces than ordinary paper on organic plastics, horn or similar materials

Definitions

  • the invention relates to a method for producing a multilayer film web, in which a first film layer is provided in regions with at least one document in accordance with a printing pattern and then on the first film layer, a second film layer is applied as a protective layer, including the at least one print layer.
  • Such film webs are known and are applied for example as privacy films on glass surfaces, wherein the first and second film layer are transparent and a print layer is arranged in accordance with a print pattern between these film layers, which causes prismatic effects and refractions, the glass surface thus equipped similar to a make textured glass opaque.
  • the second film layer is often an acrylate film and serves as a protective film for the print layer and the underlying first film layer, which may be formed for example based on PVC.
  • multilayer film webs are known as decorative films in self-adhesive equipment, for example, to provide plastic window profiles with a colored surface.
  • additional effects come into consideration here, such as the application of the printing layer of a paint containing effect pigments in order to give the multilayer film web a metallic gloss effect.
  • the object of the invention is therefore to propose a method for producing such a multilayer film web in which a high-quality printing results are achieved in a rational manner and, moreover, the adhesion between the first and second film layer is ensured even with a very dense and intensive print pattern of the print layer.
  • the proposal according to the invention is based on the fact that the at least one printing layer is applied to the first film layer by means of a gravure printing cylinder having the printing pattern, wherein the printing pattern is formed as a frequency-modulated grid of irregularly arranged discrete points of a predetermined minimum diameter, between which non-printed areas remain in which the first and second film layers are bonded together immediately adherent.
  • the proposal according to the invention is based on applying a specially selected printing pattern of irregularly arranged discrete dots in a frequency-modulated screen in the gravure printing method to the first film layer, wherein the frequency-modulated screen opens the possibility of providing areas not printed adjacent to each individual dot of the printing pattern.
  • the first and second film layers are adhesively bonded to one another immediately, so that even with dense and intensive printing of the first film layer, an always satisfactory adhesion to the second film layer is ensured.
  • the frequency-modulated screen opens the possibility to arrange all points without rigid grid or line specification, so that the print layer can be applied with much more detail and without recognizable regular structures. This is particularly desirable in the production of privacy films or metallic effect films, since the visual impression is greatly improved.
  • the frequency-modulated grid provided according to the invention offers the possibility of designing the individual points of the print layer with regard to their dimensioning according to requirements, it being possible in particular to specify a minimum diameter which is required, for example, for receiving effect pigments to be applied.
  • the irregular arrangement of the dots of the print pattern is chosen according to a proposal of the invention so that no regular line or screen pattern for a viewer with the naked eye is recognizable.
  • the printing pattern is applied for example by means of a gravure cylinder, in the surface of which the printing pattern was introduced by means of a laser or electron beam system by direct removal or evaporation of material of the gravure cylinder, as for example from DE 101 34 150 A1 is known.
  • the minimum diameter of the dots of the printed pattern is not subject to any general restrictions and can be selected by a person skilled in the art depending on the application. If commercially available effect pigments containing coatings to achieve a metallic effect in the multilayer film web to be introduced as a reference, a minimum diameter of the dots of the print pattern in the range of 30 to 50 microns is considered suitable.
  • the first film layer may be based on polyvinyl chloride (PVC) and the second layer based on an acrylate, for example polymethylmethacrylate (PMMA), and serves as a protective layer for the first film layer and the printing layer applied thereon.
  • PVC polyvinyl chloride
  • PMMA polymethylmethacrylate
  • the second film layer is laminated after the application of the printing layer to the first film layer, for example by the action of pressure and heat, wherein adhesion occurs in the areas in which due to the printing pattern, the first film layer is not printed with dots of the printing layer, i. in the areas where the first and second film layers come into contact with each other immediately superficially.
  • the first film layer can be provided not only with a print layer but also with a plurality of, for example, successively applied print layers in the manner according to the invention before the second film layer is applied to the first film layer, including the at least one print layer.
  • Such multilayer film webs are also widely used as decorative films when they are equipped with a self-adhesive bottom, for example, to glue them on a plastic window frame profile or in the case of a privacy film on a glass surface.
  • a first film layer 1 for example based on a PVC film
  • a gravure cylinder 10 indicated only symbolically, which is in peripheral connection with the upper side of the first film layer 1 and onto which by means of a laser or electron beam system by direct removal or evaporation of material of the gravure cylinder 10, a printing pattern has been applied to the type shown in more detail below, which transmits this gravure cylinder 10 in the gravure printing process by means of a paint containing effect pigments on the surface of the first film layer.
  • a printing layer 3 is thus applied to the first film layer in the gravure printing method by means of the gravure cylinder 10.
  • the print layer 3 is dried and the thus provided with a print layer 3 first film layer 1 runs to a laminating station 4, which is also a second film layer 2 supplied from a supply roll, not shown, such that the second film layer 2, including the print layer. 3 is placed on the top of the first film layer 1 and together the thus formed composite passes through the laminating station 4.
  • the second film layer can be formed, for example, from a polyacrylate film.
  • the laminating station 4 takes place by the action of pressure and heat between the two indicated laminating an adhesive bond of the first and second film layer 1, 2, including the at least one printing layer, so that a composite is produced, which in sectional view also from FIG. 2 is apparent.
  • the lower layer formed by the first film layer 1 can be seen, to which points 30 of a printing layer 3 are applied in accordance with a printing pattern explained below.
  • the second film layer 2 which is adhesively bonded directly to this first film layer 1 in those surface regions of the first film layer 1 which are not covered by dots 30 of the print layer 3.
  • the printing pattern is a frequency-modulated raster of irregularly arranged discrete dots 30, the irregular arrangement of the dots 30 of the printing pattern being chosen such that no regular line or raster pattern can be recognized.
  • Each individual discrete point 30 of the printing pattern has a predetermined minimum diameter, which in the exemplary embodiment is approximately 30 to 50 ⁇ m in adaptation to the effect pigments used in the printing ink of the printing layer.
  • the films which can be produced by the process according to the invention in the previously described manner are therefore distinguished not only by extremely advantageous printing, but also by particularly firm bonding of the first and second film layers 1, 2.
  • the method according to the invention is, of course, not limited to the selection of only a first and a second film layer, but it is equally possible to produce multilayer film webs with a higher number of layers.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen einer mehrschichtigen Folienbahn, bei welchem eine erste Folienschicht bereichsweise mit mindestens einer Druckschrift nach Maßgabe eines Druckmusters versehen wird und anschließend auf die erste Folienschicht eine zweite Folienschicht als Schutzschicht unter Einschluss der mindestens einen Druckschicht aufgebracht wird.The invention relates to a method for producing a multilayer film web, in which a first film layer is provided in regions with at least one document in accordance with a printing pattern and then on the first film layer, a second film layer is applied as a protective layer, including the at least one print layer.

Derartige Folienbahnen sind bekannt und werden beispielsweise als Sichtschutzfolien auf Glasflächen aufgebracht, wobei die erste und zweite Folienschicht transparent ausgebildet sind und eine Druckschicht nach Maßgabe eines Druckmusters zwischen diesen Folienschichten angeordnet wird, welche prismatische Effekte und Lichtbrechungen hervorruft, die eine solchermaßen ausgerüstete Glasfläche ähnlich wie ein texturiertes Glas undurchsichtig machen. Die zweite Folienschicht ist dabei häufig eine Acrylatfolie und dient als Schutzfolie für die Druckschicht und die darunter befindliche erste Folienschicht, die beispielsweise auf Basis von PVC gebildet sein kann.Such film webs are known and are applied for example as privacy films on glass surfaces, wherein the first and second film layer are transparent and a print layer is arranged in accordance with a print pattern between these film layers, which causes prismatic effects and refractions, the glass surface thus equipped similar to a make textured glass opaque. The second film layer is often an acrylate film and serves as a protective film for the print layer and the underlying first film layer, which may be formed for example based on PVC.

Auch sind derartige mehrschichtige Folienbahnen als Dekorfolien in selbstklebender Ausrüstung bekannt, beispielsweise um Kunststoff-Fensterprofile mit einer farbigen Oberfläche zu versehen. Hierbei kommen neben einer Einfärbung der Folienschichten zusätzliche Effekte in Betracht, etwa das Aufbringen der Druckschicht aus einem Effektpigmente enthaltenden Lack, um der mehrschichtigen Folienbahn einen metallischen Glanzeffekt zu verleihen.Also, such multilayer film webs are known as decorative films in self-adhesive equipment, for example, to provide plastic window profiles with a colored surface. In addition to a coloring of the film layers, additional effects come into consideration here, such as the application of the printing layer of a paint containing effect pigments in order to give the multilayer film web a metallic gloss effect.

Aus dem Stand der Technik ist es dazu bislang bekannt, die Druckschichten auf die bereitgestellte erste Folienschicht mit geeigneten Druckverfahren, insbesondere dem Tiefdruckverfahren aufzubringen, wobei amplitudenmodulierte Raster zur Anwendung kommen. Die in diesem Fall im Druckzylinder anzuordnenden Näpfchen für die Lackübertragung müssen dabei eine erhebliche Größe und bedingt durch die Herstellung auch Tiefe aufweisen, um die eine gewisse Mindestgröße aufweisenden Effektpigmente aufzunehmen. Im Ergebnis wird daher ein ästhetisch nicht ansprechendes gerastertes Druckbild mit regelmäßigen Strukturen erhalten, wobei darüber hinaus an den Stellen, wo die Druckschicht, ggf. enthaltend Metalleffektpartikel, auf der ersten Folienschicht aufgebracht ist, keine Haftung zwischen der ersten und zweiten Folienschicht entsteht, so dass unerwünscht große Bereiche ohne ausreichende Haftung zwischen der ersten und zweiten Folienschicht verbleiben, was als nachteilig angesehen wird.To date, it is known from the state of the art to apply the printed layers to the provided first film layer with suitable printing methods, in particular the gravure printing method, wherein amplitude-modulated screens are used. The to be arranged in this case in the printing cylinder cups for the paint transfer must have a significant size and due to the production also depth to accommodate the effect of a certain minimum size effect pigments. As a result, therefore, an aesthetically unattractive screened printed image having regular structures is obtained, and, moreover, adhesion is not generated between the first and second film layers at the locations where the print layer, possibly containing metallic effect particles, is applied to the first film layer undesirably large areas remain without sufficient adhesion between the first and second film layers, which is considered disadvantageous.

In der US 6 120 907 A ist ein Verfahren beschrieben, dass der Herstellung einer formstabilen Datenkarte, enthaltend eine Polymerfolie als Grundschicht und eine Glasschicht, dient. Das Aufzeichnungsmedium wird mittels Laser beschriftet und zum Schutz mit einer formstabilen Glasschicht versehen.In the US 6 120 907 A a method is described that the production of a dimensionally stable data card containing a polymer film as a base layer and a glass layer is used. The recording medium is laser-marked and provided with a dimensionally stable glass layer for protection.

Aufgabe der Erfindung ist es daher, ein Verfahren zum Herstellen einer solchen mehrschichtigen Folienbahn vorzuschlagen, bei welchem auf rationelle Weise qualitativ hochwertige Druckergebnisse erzielt werden und überdies die Haftung zwischen der ersten und zweiten Folienschicht auch bei einem sehr dichten und intensiven Druckmuster der Druckschicht gewährleistet bleibt.The object of the invention is therefore to propose a method for producing such a multilayer film web in which a high-quality printing results are achieved in a rational manner and, moreover, the adhesion between the first and second film layer is ensured even with a very dense and intensive print pattern of the print layer.

Zur Lösung der gestellten Aufgabe wird erfindungsgemäß die Ausgestaltung eines Verfahrens gemäß den Merkmalen des Patentanspruchs 1 vorgeschlagen.To achieve the object, the embodiment of a method according to the features of claim 1 is proposed according to the invention.

Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind Gegenstand der abhängigen Ansprüche.Advantageous embodiments and modifications of the invention are the subject of the dependent claims.

Der erfindungsgemäße Vorschlag beruht darauf, dass die mindestens eine Druckschicht im Tiefdruckverfahren mittels eines das Druckmuster aufweisenden Tiefdruckzylinders auf die erste Folienschicht aufgebracht wird, wobei das Druckmuster als frequenzmoduliertes Raster von unregelmäßig angeordneten diskreten Punkten eines vorgegebenen Mindestdurchmessers ausgebildet ist, zwischen denen nicht bedruckte Bereiche verbleiben, in welchen die erste und zweite Folienschicht unmittelbar haftfest miteinander verbunden werden.The proposal according to the invention is based on the fact that the at least one printing layer is applied to the first film layer by means of a gravure printing cylinder having the printing pattern, wherein the printing pattern is formed as a frequency-modulated grid of irregularly arranged discrete points of a predetermined minimum diameter, between which non-printed areas remain in which the first and second film layers are bonded together immediately adherent.

Mit anderen Worten beruht der erfindungsgemäße Vorschlag darauf, ein speziell ausgewähltes Druckmuster aus unregelmäßig angeordneten diskreten Punkten in einem frequenzmodulierten Raster im Tiefdruckverfahren auf die erste Folienschicht aufzubringen, wobei das frequenzmodulierte Raster die Möglichkeit eröffnet, benachbart zu jedem einzelnen Punkt des Druckmusters nicht bedruckte Bereiche vorzusehen, in denen die erste und zweite Folienschicht unmittelbar haftfest miteinander verbunden werden, so dass selbst bei dichter und intensiver Bedruckung der ersten Folienschicht eine stets zufriedenstellende Haftung zur zweiten Folienschicht gewährleistet ist. Darüber hinaus eröffnet das frequenzmodulierte Raster die Möglichkeit, alle Punkte ohne starre Raster oder Linienvorgabe anzuordnen, so dass die Druckschicht erheblich detailreicher und ohne erkennbare regelmäßige Strukturen aufgebracht werden kann. Dies ist insbesondere bei der Herstellung von Sichtschutzfolien oder Metalleffektfolien besonders wünschenswert, da der optische Eindruck enorm verbessert wird. Überdies bietet die erfindungsgemäß vorgesehene frequenzmodulierte Rasterung die Möglichkeit, die einzelnen Punkte der Druckschicht hinsichtlich ihrer Dimensionierung den Anforderungen entsprechend auszulegen, wobei insbesondere möglich ist, einen Mindestdurchmesser vorzugeben, der beispielsweise zur Aufnahme von aufzubringenden Effektpigmenten erforderlich ist.In other words, the proposal according to the invention is based on applying a specially selected printing pattern of irregularly arranged discrete dots in a frequency-modulated screen in the gravure printing method to the first film layer, wherein the frequency-modulated screen opens the possibility of providing areas not printed adjacent to each individual dot of the printing pattern. in which the first and second film layers are adhesively bonded to one another immediately, so that even with dense and intensive printing of the first film layer, an always satisfactory adhesion to the second film layer is ensured. In addition, the frequency-modulated screen opens the possibility to arrange all points without rigid grid or line specification, so that the print layer can be applied with much more detail and without recognizable regular structures. This is particularly desirable in the production of privacy films or metallic effect films, since the visual impression is greatly improved. Moreover, the frequency-modulated grid provided according to the invention offers the possibility of designing the individual points of the print layer with regard to their dimensioning according to requirements, it being possible in particular to specify a minimum diameter which is required, for example, for receiving effect pigments to be applied.

Die unregelmäßige Anordnung der Punkte des Druckmusters wird nach einem Vorschlag der Erfindung so gewählt, dass kein regelmäßiges Linien- oder Rastermuster für einen Betrachter mit bloßem Auge erkennbar ist.The irregular arrangement of the dots of the print pattern is chosen according to a proposal of the invention so that no regular line or screen pattern for a viewer with the naked eye is recognizable.

Das Druckmuster wird beispielsweise mittels eines Tiefdruckzylinders aufgebracht, in dessen Oberfläche das Druckmuster mittels eines Laser- oder Elektronenstrahlsystems durch direktes Entfernen oder Verdampfen von Material des Tiefdruckzylinders eingebracht wurde, wie es beispielsweise aus der DE 101 34 150 A1 bekannt ist.The printing pattern is applied for example by means of a gravure cylinder, in the surface of which the printing pattern was introduced by means of a laser or electron beam system by direct removal or evaporation of material of the gravure cylinder, as for example from DE 101 34 150 A1 is known.

Der Mindestdurchmesser der Punkte des Druckmusters unterliegt keinen generellen Beschränkungen und kann vom Fachmann je nach Anwendungsfall ausgewählt werden. Sofern handelsübliche Effektpigmente enthaltende Lacke zur Erzielung eines Metallic-Effektes in die mehrschichtige Folienbahn als Druckschrift eingebracht werden sollen, wird ein Mindestdurchmesser der Punkte des Druckmusters im Bereich von 30 bis 50 µm als geeignet angesehen.The minimum diameter of the dots of the printed pattern is not subject to any general restrictions and can be selected by a person skilled in the art depending on the application. If commercially available effect pigments containing coatings to achieve a metallic effect in the multilayer film web to be introduced as a reference, a minimum diameter of the dots of the print pattern in the range of 30 to 50 microns is considered suitable.

Die erste Folienschicht kann nach einem Vorschlag der Erfindung auf Basis von Polyvinylchlorid (PVC) und die zweite Schicht auf Basis eines Acrylats, beispielsweise Polymethylmethacrylat (PMMA) ausgebildet sein und dient als Schutzschicht für die erste Folienschicht sowie die darauf aufgebrachte Druckschicht. Die zweite Folienschicht wird nach dem Aufbringen der Druckschicht auf die erste Folienschicht beispielsweise durch Einwirkung von Druck und Wärme aufkaschiert, wobei eine Haftung in den Bereichen erfolgt, in denen aufgrund des Druckmusters die erste Folienschicht nicht mit Punkten der Druckschicht bedruckt ist, d.h. in den Bereichen, in denen die erste und zweite Folienschicht unmittelbar oberflächlich aneinander zur Anlage kommen.According to a proposal of the invention, the first film layer may be based on polyvinyl chloride (PVC) and the second layer based on an acrylate, for example polymethylmethacrylate (PMMA), and serves as a protective layer for the first film layer and the printing layer applied thereon. The second film layer is laminated after the application of the printing layer to the first film layer, for example by the action of pressure and heat, wherein adhesion occurs in the areas in which due to the printing pattern, the first film layer is not printed with dots of the printing layer, i. in the areas where the first and second film layers come into contact with each other immediately superficially.

Es versteht sich, dass die erste Folienschicht nicht nur mit einer Druckschicht, sondern auch mit mehreren, beispielsweise aufeinanderfolgend aufgebrachten Druckschichten in der erfindungsgemäßen Weise versehen werden kann, bevor die zweite Folienschicht unter Einschluss der mindestens einen Druckschicht auf die erste Folienschicht aufgebracht wird.It is understood that the first film layer can be provided not only with a print layer but also with a plurality of, for example, successively applied print layers in the manner according to the invention before the second film layer is applied to the first film layer, including the at least one print layer.

Darüber hinaus ist es möglich, die solchermaßen hergestellte mehrschichtige Folienbahn zu prägen, um ihr eine dreidimensional strukturierte Oberfläche zu verleihen, wie es beispielsweise bei Dekorfolien für Kunststoff-Fensterprofile wünschenswert ist.In addition, it is possible to emboss the multilayer film web produced in this way in order to give it a three-dimensionally structured surface, as is desirable, for example, in decorative films for plastic window profiles.

Derartige mehrschichtige Folienbahnen sind darüber hinaus als Dekorfolien vielfältig verwendbar, wenn sie mit einer selbstklebenden Unterseite ausgerüstet werden, um sie beispielsweise auf einem Kunststoff-Fensterrahmenprofil oder im Falle einer Sichtschutzfolie auf einer Glasfläche aufzukleben.Such multilayer film webs are also widely used as decorative films when they are equipped with a self-adhesive bottom, for example, to glue them on a plastic window frame profile or in the case of a privacy film on a glass surface.

Weitere Einzelheiten der Erfindung werden nachfolgend anhand der ein Ausführungsbeispiel darstellenden Zeichnung erläutert. Es zeigen:

Figur 1
eine Prinzipdarstellung des erfindungsgemäßen Verfahrens zum Herstellen einer mehrschichtigen Folienbahn;
Figur 2
einen Schnitt durch eine nach dem erfindungsgemäßen Verfahren hergestellte mehrschichtige Folienbahn;
Figur 3
in vergrößerter Darstellung eine Aufsicht auf die Druckschicht der nach dem erfindungsgemäßen Verfahren hergestellten Folienbahn.
Further details of the invention are explained below with reference to an embodiment illustrative drawing. Show it:
FIG. 1
a schematic representation of the inventive method for producing a multilayer film web;
FIG. 2
a section through a prepared by the novel multilayer film web;
FIG. 3
in an enlarged view, a plan view of the printing layer of the film web produced by the process according to the invention.

Aus der Figur 1 ist ein Verfahren zum Herstellen einer mehrschichtigen Folienbahn ersichtlich.From the FIG. 1 For example, a method of making a multilayer film web is apparent.

Von einer nicht näher gekennzeichneten Vorratsrolle wird eine erste Folienschicht 1 beispielsweise auf Basis einer PVC-Folie einem lediglich symbolhaft angedeuteten Tiefdruckzylinder 10 zugeführt, der mit der Oberseite der ersten Folienschicht 1 in umfänglicher Verbindung steht und auf welchen mittels eines Laser- oder Elektronenstrahlsystems durch direktes Entfernen oder Verdampfen von Material des Tiefdruckzylinders 10 ein Druckmuster der nachfolgend noch näher dargestellten Art aufgebracht worden ist, welches dieser Tiefdruckzylinder 10 im Tiefdruckverfahren mittels eines Effektpigmente enthaltenden Lackes auf die Oberfläche der ersten Folienschicht überträgt. Im Ergebnis wird somit eine Druckschicht 3 im Tiefdruckverfahren mittels des Tiefdruckzylinders 10 auf die ersten Folienschicht aufgebracht.From a supply roll not marked in detail, a first film layer 1, for example based on a PVC film, is fed to a gravure cylinder 10 indicated only symbolically, which is in peripheral connection with the upper side of the first film layer 1 and onto which by means of a laser or electron beam system by direct removal or evaporation of material of the gravure cylinder 10, a printing pattern has been applied to the type shown in more detail below, which transmits this gravure cylinder 10 in the gravure printing process by means of a paint containing effect pigments on the surface of the first film layer. As a result, a printing layer 3 is thus applied to the first film layer in the gravure printing method by means of the gravure cylinder 10.

Nachfolgend wird die Druckschicht 3 getrocknet und die solchermaßen mit einer Druckschicht 3 versehene erste Folienschicht 1 läuft einer Kaschierstation 4 zu, welcher auch eine zweite Folienschicht 2 von einer nicht näher dargestellten Vorratsrolle zugeführt wird, dergestalt, dass die zweite Folienschicht 2 unter Einschluss der Druckschicht 3 auf die Oberseite der ersten Folienschicht 1 aufgelegt wird und gemeinsam der solchermaßen gebildete Verbund die Kaschierstation 4 durchläuft. Die zweite Folienschicht kann beispielsweise aus einer Polyacrylatfolie gebildet sein.Subsequently, the print layer 3 is dried and the thus provided with a print layer 3 first film layer 1 runs to a laminating station 4, which is also a second film layer 2 supplied from a supply roll, not shown, such that the second film layer 2, including the print layer. 3 is placed on the top of the first film layer 1 and together the thus formed composite passes through the laminating station 4. The second film layer can be formed, for example, from a polyacrylate film.

In der Kaschierstation 4 erfolgt durch Einwirkung von Druck und Wärme zwischen den beiden angedeuteten Kaschierwalzen eine haftfeste Verbindung der ersten und zweiten Folienschicht 1, 2 unter Einschluss der mindestens einen Druckschicht, so dass ein Verbund hergestellt wird, der in Schnittdarstellung auch aus der Figur 2 ersichtlich ist.In the laminating station 4 takes place by the action of pressure and heat between the two indicated laminating an adhesive bond of the first and second film layer 1, 2, including the at least one printing layer, so that a composite is produced, which in sectional view also from FIG. 2 is apparent.

Man erkennt die von der ersten Folienschicht 1 gebildete untere Lage, auf die Punkte 30 einer Druckschicht 3 nach Maßgabe eines nachfolgend noch erläuterten Druckmusters aufgebracht sind. Darüber befindet sich die zweite Folienschicht 2, welche in denjenigen Oberflächenbereichen der ersten Folienschicht 1, die nicht von Punkten 30 der Druckschicht 3 bedeckt sind, unmittelbar mit dieser ersten Folienschicht 1 haftfest verbunden ist.The lower layer formed by the first film layer 1 can be seen, to which points 30 of a printing layer 3 are applied in accordance with a printing pattern explained below. Above this is the second film layer 2, which is adhesively bonded directly to this first film layer 1 in those surface regions of the first film layer 1 which are not covered by dots 30 of the print layer 3.

Aus der angedeuteten Vergrößerungsdarstellung der Druckschicht 3 entsprechend der Aufsicht auf die Darstellung gemäß Figur 2 ist in der Figur 3 die spezifische Ausgestaltung des aufgebrachten Druckmusters der Druckschicht 3 erkennbar. Es handelt sich bei dem Druckmuster um ein frequenzmoduliertes Raster von unregelmäßig angeordneten diskreten Punkten 30, wobei die unregelmäßige Anordnung der Punkte 30 des Druckmusters so gewählt ist, dass kein regelmäßiges Linien- oder Rastermuster erkennbar ist.From the indicated magnification representation of the printing layer 3 according to the plan view of the illustration FIG. 2 is in the FIG. 3 the specific embodiment of the applied print pattern of the print layer 3 can be seen. The printing pattern is a frequency-modulated raster of irregularly arranged discrete dots 30, the irregular arrangement of the dots 30 of the printing pattern being chosen such that no regular line or raster pattern can be recognized.

Jeder einzelne diskrete Punkt 30 des Druckmusters weist einen vorgegebenen Mindestdurchmesser auf, der im Ausführungsbeispiel in Anpassung an die verwendeten Effektpigmente in der Druckfarbe der Druckschicht etwa 30 bis 50 µm beträgt.Each individual discrete point 30 of the printing pattern has a predetermined minimum diameter, which in the exemplary embodiment is approximately 30 to 50 μm in adaptation to the effect pigments used in the printing ink of the printing layer.

Zwischen jedem einzelnen Punkt 30 des Druckmusters verbleibt trotz der hohen Druckdichte und der Abwesenheit sichtbarer regelmäßiger Strukturen ein genügend großer unbedruckter Bereich, in welchem eine unmittelbare Verbindung der ersten und zweiten Folienschicht 1, 2 durch unmittelbare Anlage aneinander und haftfeste Verbindung in der Kaschierstation 4 bewirkt werden kann.Between each individual point 30 of the printing pattern remains despite the high print density and the absence of visible regular structures, a sufficiently large unprinted area in which a direct connection of the first and second film layer 1, 2 by direct contact with each other and adhesive bond in the laminating station 4 are effected can.

Die nach dem erfindungsgemäßen Verfahren in der vorangehend geschilderten Weise herstellbaren Folien zeichnen sich von daher nicht nur durch eine äußerst vorteilhafte Bedruckung, sondern auch durch besonders feste Verbindung der ersten und zweiten Folienschicht 1, 2 aus.The films which can be produced by the process according to the invention in the previously described manner are therefore distinguished not only by extremely advantageous printing, but also by particularly firm bonding of the first and second film layers 1, 2.

Der Fachmann wird erkennen, dass das erfindungsgemäße Verfahren selbstverständlich nicht auf die Auswahl von lediglich einer ersten und einer zweiten Folienschicht beschränkt ist, sondern es können in gleicher Weise auch mehrschichtige Folienbahnen mit einer höheren Schichtenanzahl hergestellt werden.The person skilled in the art will recognize that the method according to the invention is, of course, not limited to the selection of only a first and a second film layer, but it is equally possible to produce multilayer film webs with a higher number of layers.

Claims (7)

  1. Method for producing a multiple-layer film web, in the case of which method a first film layer (1) is provided in regions with at least one printed layer (3) in accordance with a printing pattern, and a second film layer (2) is subsequently applied to the first film layer as a protective layer with the inclusion of the at least one printed layer (3), characterized in that the at least one printed layer (3) is applied to the first film layer (1) in the gravure printing method by means of a gravure printing cylinder (10) which has the printing pattern, and the printing pattern is configured as a frequency-modulated grid of irregularly arranged discrete dots (30) of a predefined minimum diameter, between which non-printed regions remain, in which the first and second film layer (1, 2) are connected directly to one another in a firmly adhered manner.
  2. Method according to Claim 1, characterized in that the irregular arrangement of the dots (30) of the printing pattern is selected in such a way that no regular line pattern or grid pattern can be detected.
  3. Method according to either of Claims 1 and 2, characterized in that the minimum diameter of the dots (30) of the printing pattern is from 30 to 50 µm.
  4. Method according to one of Claims 1 to 3, characterized in that the printed layer (3) contains effect pigments.
  5. Method according to one of Claims 1 to 4, characterized in that the first film layer (1) is configured on the basis of polyvinyl chloride and the second film layer (2) is configured on the basis of an acrylate, and the second film layer (2) is laminated onto the first film layer (1) after the application of the printed layer (3).
  6. Method according to one of Claims 1 to 5, characterized in that the multiple-layer film web is embossed.
  7. Use of a film web which is produced according to the preceding claims and is configured with a self-adhesive underside as a decorative film.
EP15159724.2A 2014-03-20 2015-03-18 Method for producing a multilayered printed sheet of film Active EP2921312B1 (en)

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PL15159724T PL2921312T3 (en) 2014-03-20 2015-03-18 Method for producing a multilayered printed sheet of film

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DE102014103873.8A DE102014103873B4 (en) 2014-03-20 2014-03-20 Method for producing a multilayer film web and its use as a decorative film

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EP2921312A1 EP2921312A1 (en) 2015-09-23
EP2921312B1 true EP2921312B1 (en) 2018-07-25

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DE (1) DE102014103873B4 (en)
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CN107933087A (en) * 2017-12-21 2018-04-20 重庆渝州印务厂 A kind of film covering device

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DE69032568T2 (en) * 1989-02-20 1999-05-06 Dainippon Printing Co Ltd Process for the production of a decorative film
DE4440853C2 (en) * 1994-11-15 1998-07-16 Dlw Ag Process for decorating documents that are difficult or impossible to print directly in the form of plates, flexible webs or substrates
US6120907A (en) * 1997-10-24 2000-09-19 Agfa-Gevaert, N.V. Data card comprising a laser recording medium and a thin glass layer
DE19920359A1 (en) * 1999-05-04 2000-11-09 Wolff Walsrode Ag Tear strips with security feature, a process for its production and its use in packaging material
DE10018316C1 (en) * 2000-04-13 2001-10-18 Galaxy Media Syst Werbemittel Multiple printing method for transparent material has over-printing of similar ink colors used for providing high color intensity image
DE10134150A1 (en) 2001-07-13 2003-01-30 Heidelberger Druckmasch Ag Laser engraving method for printing plate manufacture uses high power laser pulses with pulse duration between single femtoseconds and single nanoseconds
US8697337B2 (en) * 2012-01-23 2014-04-15 Albert G. Roshelli, JR. Laminating apparatus and method of using the same

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DE102014103873B4 (en) 2015-11-19
EP2921312A1 (en) 2015-09-23
PT2921312T (en) 2018-10-26
PL2921312T3 (en) 2019-03-29
DE102014103873A1 (en) 2015-09-24

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