EP1375189B1 - Process for the production of an image transfer sheet - Google Patents

Process for the production of an image transfer sheet Download PDF

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Publication number
EP1375189B1
EP1375189B1 EP20030405476 EP03405476A EP1375189B1 EP 1375189 B1 EP1375189 B1 EP 1375189B1 EP 20030405476 EP20030405476 EP 20030405476 EP 03405476 A EP03405476 A EP 03405476A EP 1375189 B1 EP1375189 B1 EP 1375189B1
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EP
European Patent Office
Prior art keywords
layer
image
film
adhesive
toner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP20030405476
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German (de)
French (fr)
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EP1375189A1 (en
Inventor
Markus Fritschi
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Kammann Spezialmaschinen und Steuerungstechnik Gmb
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Kammann Spezialmaschinen und Steuerungstechnik GmbH
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
    • B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
    • B44C1/17—Dry transfer
    • B44C1/1712—Decalcomanias applied under heat and pressure, e.g. provided with a heat activable adhesive
    • B44C1/172—Decalcomanias provided with a layer being specially adapted to facilitate their release from a temporary carrier
    • 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
    • B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
    • B41M5/035—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by sublimation or volatilisation of pre-printed design, e.g. sublistatic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0027—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or layers by lamination or by fusion of the coatings or layers
    • 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
    • B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
    • B41M5/0256—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet the transferable ink pattern being obtained by means of a computer driven printer, e.g. an ink jet or laser printer, or by electrographic means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]

Definitions

  • the invention relates to a method for producing an image transfer film for transferring an image from the image transfer film to an image carrier according to the preamble of claim 1 and an image transfer film produced by the process according to the preamble of claim 4.
  • the so-called dry transfer is characterized in that an image is transferred from an image transfer film (hereinafter abbreviated image film) to an image carrier (hereinafter carrier).
  • image film hereinafter abbreviated image film
  • carrier an image carrier
  • the pigments forming the graphic, graphic or other representation are not transferred as clusters (hereinafter toner substrate or substrate) as such, but the substrate is transferred with the image film, which is then separated in remaining on the carrier image sections and removed from the carrier image film residues
  • a picture film which comprises in the form of a laminate a base layer, a layer applied to the base layer of a clearcoat, on the clearcoat layer images corresponding toner substrate and a toner substrate and clearcoat layer covering layer of an adhesive. This laminate is engaged with the carrier via the adhesive layer, for example by pressure and heat.
  • the next production step is the separation of the image film applied to the substrate into image sections and image film residues by removing the image film from the carrier again.
  • the image film breaks off along the break points and, due to the difference in adhesion, separates the carrier layer from the clearcoat layer above the substrate so that the adhesive layer, the substrate and the clearcoat layer covering the substrate remain on the carrier, the remainder being seen from the latter the support surface is free, that is uncovered by image film.
  • This separation process ie the detachment of the image sections from the image film is referred to by the professional world as a "selective release" or "weeding" as a synonym.
  • the invention differs from the prevailing practice in achieving the object of the invention in that when adhesively bonding a picture film with a carrier, it only applies adhesive in accordance with the geometric configurations of the picture parts of the picture film, i. according to which the toner substrates provide by the substrates release in them absorbed quantities of adhesive at the time of bonding or coating.
  • This "sectoral" release eliminates the known from the prior art fracture lines, so that the selective release is circumvented with the problem adhering to it while increasing the manufacturing security.
  • the image film 10 comprises a base layer 11, a clearcoat layer 12 and toner substrates 13 representing print images (only one toner substrate is shown).
  • the coating of the base layer 11 with the clearcoat 12 is carried out according to conventional techniques.
  • the support layer 11 is preferably a film, preferably of a polyester or of a smooth-coated paper, with a thickness of 20 to 50 microns, preferably a thickness of 23 to 26 microns.
  • the clearcoat layer 12 applied to the base layer 11 is formed of an acrylic paint. This acrylic lacquer is mixed with a release agent which favors the separation of the base layer 11 from the clearcoat 12 after printing has taken place.
  • the release agent is preferably a vaporizable wax added to the acrylic varnish of the clearcoat layer 12 in proportions (weight) of 2% to 5%, preferably 2.5% to 3.5%.
  • the printing process is carried out using heat and pressure, wherein the registered in image sheet 10 heat evaporates the wax.
  • the print images, ie, the toner transfer 13 representing toner images are applied.
  • the application of the substrate 13 is preferably carried out by computer-controlled printers, which deposit toner particles according to color, quantity and the area of the printed image in accordance with a prescription or program stored in a computer (computer).
  • the substrate 13 is applied the image surface of the substrate 13 intended for viewing is in engagement with the clearcoat layer.
  • the substrate or substrates 13 After application of the substrate or substrates 13 one or more substrates 13 carrying surface 12a over the entire surface, coated with a substrate 13 covering adhesive layer 14, which is then again all over, except in substrates 13 registered adhesive removed.
  • Application and removal of the adhesive layer 14 take place by means of squeegee-like coating strips, which in the same direction of operation of the loading and unloading device successively withdraw liquid adhesive from a storage container in order to supply it to a receptacle after coating as such.
  • the toner substrate 13 is characterized by a greater roughness and porosity than the clearcoat film 11, with the result that upon removal of the fully applied adhesive layer 14 adhesive of this layer is registered in the toner substrate 13 as there remaining and available adhesive supply.
  • the adhesive is at elevated temperature, ie at a temperature of 100% C to 140% C, preferably 120% - 130% C, in the molten state alsund then removed, wherein the substrate received in the adhesive then cools and can solidify itself upon application of the image film 10 to a carrier 15, according to the heat introduced in the process, to liquefy again to adhesive purposes and then to solidify.
  • Fig. 2 shows in schematic form a device 16 for applying a picture film 10 on a support 15 (eg a compact disc). It shows the carrier 15 and a punch 17, preferably of silicone, between which the image film 10 is arranged according to the invention.
  • the image film 10 heated and connected by depressing the punch 17 with the carrier 15 by the adhesive reactivated by the heating of the substrate 13 is pressed out.
  • the pressure necessary for the connection can also be applied to the image film 10 by a roller (not shown).
  • the pressures to apply the punch 17 or a roller are between 0.75 kg per mm 2 and 1.5 kg per mm 2 , preferably between 1.0 kg per mm 2 and 1.2 kg per mm 2 .
  • the support layer 11 is removed from the clearcoat 12, so that the substrate 13 with the clearcoat layer 12 spanning the substrate 13 remains as a protective layer for the substrate 13 on the support 15.

Landscapes

  • Decoration By Transfer Pictures (AREA)
  • Laminated Bodies (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Herstellung einer Bildübertragungsfolie zur Übertragung eines Bildes von der Bildübertragungsfolie auf einen Bildträger nach dem Oberbegriff des Patentanspruches 1 und eine nach dem Verfahren hergestellte Bildübertragungsfolie nach dem Oberbegriff des Patentanspruches 4.The invention relates to a method for producing an image transfer film for transferring an image from the image transfer film to an image carrier according to the preamble of claim 1 and an image transfer film produced by the process according to the preamble of claim 4.

Der sogenannte Trockentransfer kennzeichnet sich dadurch, dass ein Bild von einer Bildübertragungsfolie (folgend kurz Bildfolie) auf einen Bildträger (folgend kurz Träger) übertragen wird. Dabei werden nicht die die bildliche, graphische oder sonstige Darstellung bildenden Pigmentfarbstoffe als Haufwerke (folgend kurz Tonersubstrat oder Substrat) als solche übertragen, sondern das Substrat wird mit der Bildfolie übertragen, die anschliessend in auf dem Träger verbleibende Bildabschnitte und vom Träger abgezogene Bildfolienreste vereinzelt wird. Dazu ist eine Bildfolie bekannt, die in Form eines Laminates eine Tragschicht, eine auf die Tragschicht aufgebrachte Schicht aus einem Klarlack, auf der Klarlackschicht Bildern entsprechende Tonersubstrat und eine Tonersubstrat und Klarlackschicht abdeckende Schicht aus einem Klebstoff umfasst. Dieses Laminat wird mit dem Träger über die Klebschicht, beispielsweise durch Druck und Wärme in Eingriff gebracht. Bei diesem Vorgang, siehe z.B. die Dokumente US 3 928 710 , US 3 519 456 , EP0 621 142 , bildet sich eine um den Umfang der Fläche des Substrates umlaufende, senkrecht zur Klebschicht stehende Bruchstelle, die sich in die Klarlackschicht fortsetzt. Die Bruchstelle bildet sich, weil das Tonersubstrat mit abdeckender Klebschicht von dem Laminat aus Tragschicht, Klarlackschicht und Klarlackschicht überziehender Klebschicht abragt. Die Adhäsion (Haftungskräfte) sind so eingestellt, dass die Adhäsion zwischen der Klebschicht und dem Substrat und Klarlackschicht grösser ist als die Adhäsion zwischen Klarlackschicht und Tragschicht. Nachdem die Bildfolie mit dem Träger in Eingriff gebracht ist, folgt als nächster Fertigungsschritt die Vereinzelung der auf dem Substrat aufgebrachten Bildfolie in Bildabschnitte und Bildfolienreste, indem die Bildfolie wieder vom Träger abgezogen wird. Dabei löst sich die Bildfolie entlang den Bruchstellen abreissend und aufgrund der Adhäsionsdifferenz die Tragschicht sich von der Klarlackschicht über dem Substrat trennend ab, so dass auf dem Träger von letzterem her gesehen, die Klebschicht, das Substrat und die das Substrat überdeckende Klarlackschicht verbleibt, der Rest der Trägerfläche frei, d.h. unbedeckt von Bildfolie ist. Dieser Trennungsvorgang, d.h. das Herauslösen der Bildabschnitte aus der Bildfolie wird von der Fachwelt als "selective release" oder auch "weeding" als Synonym dazu bezeichnet. Beide Bezeichnungen charakterisieren die Entfernung der Bildfolienreste entlang bestimmter Bruchstellen (in Klebschicht, Substrat und Klarlackschicht), wobei die Delamition von Bildfolienschichten (Tragschicht von der Klarlackschicht) nicht unter den Begriff des "weeding" fällt. Die bekannte Bildfolie hat den Nachteil, dass es beim "selective release" fallweise vorkommt, dass der Bildfolienrest sich nicht einwandfrei entlang der umlaufenden Bruchlinie der auf dem Träger verbleibenden Klebschicht des Bildabschnittes löst, was sich in Form von Fehldrucken darstellt, die mit Blick auf wirtschaftliche Fertigungsgeschwindigkeiten ohne Einzelobjektinspektionen nicht hinnehmbar sind. Ausgehend von diesem Stand der Technik hat sich der Erfinder die Aufgabe gestellt, ein Verfahren zur Herstellung einer Bildfolie und eine nach dem Verfahren ausgestaltete Bildfolie zu entwickeln, mit der eine fehlerbehaftete Abtrennung, d.h. Vereinzelung der Bildfolie in Bildabschnitte und Bildfolienreste vermieden ist und diese Aufgabe wird durch ein Herstellverfahren mit den kennzeichnenden Merkmalen des Patentanspruches 1 und durch eine Bildfolie mit den kennzeichnenden Merkmalen des Patentanspruches 4 gelöst. Vorteilhafte Ausgestaltungen kennzeichnen die den Ansprüchen 1 und 4 folgenden Ansprüche.The so-called dry transfer is characterized in that an image is transferred from an image transfer film (hereinafter abbreviated image film) to an image carrier (hereinafter carrier). In this case, the pigments forming the graphic, graphic or other representation are not transferred as clusters (hereinafter toner substrate or substrate) as such, but the substrate is transferred with the image film, which is then separated in remaining on the carrier image sections and removed from the carrier image film residues , For this purpose, a picture film is known which comprises in the form of a laminate a base layer, a layer applied to the base layer of a clearcoat, on the clearcoat layer images corresponding toner substrate and a toner substrate and clearcoat layer covering layer of an adhesive. This laminate is engaged with the carrier via the adhesive layer, for example by pressure and heat. In this process, see eg the documents US 3,928,710 . US 3,519,456 . EP0 621 142 , forms around the circumference of the surface of the substrate encircling, perpendicular to the adhesive layer breaking point, which continues into the clearcoat. The break point is formed because the toner substrate with covering adhesive layer of the laminate of base layer, clear coat and Clear coat layer coating adhesive layer protrudes. Adhesion (adhesion forces) are adjusted so that the adhesion between the adhesive layer and the substrate and clearcoat layer is greater than the adhesion between the clearcoat layer and the basecoat. After the image film has been brought into engagement with the carrier, the next production step is the separation of the image film applied to the substrate into image sections and image film residues by removing the image film from the carrier again. In the process, the image film breaks off along the break points and, due to the difference in adhesion, separates the carrier layer from the clearcoat layer above the substrate so that the adhesive layer, the substrate and the clearcoat layer covering the substrate remain on the carrier, the remainder being seen from the latter the support surface is free, that is uncovered by image film. This separation process, ie the detachment of the image sections from the image film is referred to by the professional world as a "selective release" or "weeding" as a synonym. Both terms characterize the removal of the image film residues along certain break points (in the adhesive layer, substrate and clearcoat layer), the delamination of image film layers (base layer of the clearcoat layer) not falling under the term "weeding". The known image film has the disadvantage that it occasionally occurs in the "selective release" that the image film residue does not dissolve properly along the circumferential break line of the remaining on the carrier adhesive layer of the image portion, which is in the form of misprints, with a view to economic Production speeds are unacceptable without individual object inspections. Based on this prior art, the inventor has set itself the task of a method for Produce a picture film and designed according to the process image sheet to avoid a faulty separation, ie separation of the image film in image sections and image film residues and this object is achieved by a manufacturing method with the characterizing features of claim 1 and by a picture film with the characterizing Characteristics of claim 4 solved. Advantageous embodiments characterize the claims 1 and 4 following claims.

Die Erfindung weicht zur Lösung der Aufgabe der Erfindung von der herrschenden Praxis dadurch ab, dass sie bei Verklebung einer Bildfolie mit einem Träger, Klebstoff nur entsprechend den geometrischen Konfigurationen der Bildteile der Bildfolie, d.h. entsprechend denen der Tonersubstrate bereitstellt, indem die Substrate in ihnen aufgenommene Klebstoffmengen zum Zeitpunkt der Verklebung oder Beschichtung freisetzen. Mit dieser "sektoriellen" Freisetzung erübrigen sich die aus dem Stand der Technik bekannten Bruchlinien, so dass der selective release mit der ihm anhaftenden Problematik unter Erhöhung der Fertigungssicherheit umgangen ist.The invention differs from the prevailing practice in achieving the object of the invention in that when adhesively bonding a picture film with a carrier, it only applies adhesive in accordance with the geometric configurations of the picture parts of the picture film, i. according to which the toner substrates provide by the substrates release in them absorbed quantities of adhesive at the time of bonding or coating. This "sectoral" release eliminates the known from the prior art fracture lines, so that the selective release is circumvented with the problem adhering to it while increasing the manufacturing security.

Folgend wird das Verfahren zur Herstellung der erfindungsgemässen Bildfolie beschrieben. Eine bevorzugte Ausführungsform einer nach dem Verfahren hergestellten Bildfolie ist in der Zeichnung dargestellt, deren

Fig. 1
eine Bildfolie im Längsschnitt und
Fig. 2
eine Bildfolie vor Aufbringung auf einen Träger
darstellen.The process for producing the image film of the invention is described below. A preferred embodiment of a film produced by the process is shown in the drawing, whose
Fig. 1
a picture film in longitudinal section and
Fig. 2
a picture film before application to a carrier
represent.

Gemäss Fig. 1 umfasst die erfindungsgemässe Bildfolie 10 eine Tragschicht 11, eine Klarlackschicht 12 und Druckbilder darstellende Tonersubstrate 13 (nur ein Tonersubstrat ist dargestellt). Die Beschichtung der Tragschicht 11 mit der Klarlackschicht 12 erfolgt nach herkömmlichen Techniken. Die Tragschicht 11 ist bevorzugt eine Folie, vorzugsweise aus einem Polyester oder aus einem glattbeschichteten Papier, mit einer Stärke von 20 bis 50 µm, vorzugsweise einer Stärke von 23 bis 26 µm. Die auf die Tragschicht 11 aufgebrachte Klarlackschicht 12 ist aus einem Acryllack gebildet. Dieser Acryllack ist mit einem Trennmittel versetzt, das die Trennung der Tragschicht 11 von der Klarlackschicht 12 nach erfolgtem Druckvorgang begünstigt. Das Trennmittel ist vorzugsweise ein verdampfbares Wachs, das dem Acryllack der Klarlackschicht 12 in Anteilen (Gewicht) von 2% bis 5%, vorzugsweise 2,5% bis 3,5%, beigegeben ist. Der Druckvorgang erfolgt unter Anwendung von Wärme und Druck, wobei die in Bildfolie 10 eingetragene Wärme das Wachs verdampfen lässt. Auf die Klarlackschicht 11 werden die Druckbilder, d.h. die Druckbilder darstellenden Tonersubstrate 13 aufgebracht. Die Aufbringung des Substrates 13 wird bevorzugt von Computer gesteuerten Druckern vorgenommen, die nach Massgabe eines in einer EDV (Computer) Einrichtung gespeicherten Vorschrift oder Programm Tonerpartikel nach Farbe, Menge und den Bereich des Druckbildes zur Ablagerung bringen. Das Substrat 13 wird so aufgebracht, dass die zur Ansicht bestimmte Bildfläche des Substrates 13 mit der Klarlackschicht in Eingriff steht. Nach Aufbringung des oder der Substrate 13 wird ein oder mehrere Substrate 13 tragenden Fläche 12a vollflächig, mit einer auch Substrate 13 überdeckende Klebschicht 14 überzogen, die anschliessend wieder vollflächig, ausgenommen in Substrate 13 eingetragenen Klebstoff, entfernt wird. Auftrag und Entfernung der Klebschicht 14 erfolgen durch rakelähnliche Beschichtungsleisten, die in gleichgerichteter Arbeitsrichtung der Be- und Entschichtungseinrichtung einander folgend flüssigen Klebstoff aus einem Vorratsbehälter abziehen, um ihn nach der Beschichtung als solchen einem Aufnahmebehälter wieder zuzuführen. Das Tonersubstrat 13 kennzeichnet sich durch eine grössere Rauhigkeit und Porosität als die Klarlackschicht 11, was zur Folge hat, dass bei Entfernung der vollflächig aufgebrachten Klebschicht 14 Klebstoff dieser Schicht in das Tonersubstrat 13 als ein dort verbleibender und verfügbarer Klebmittelvorrat eingetragen wird. Der Klebstoff wird bei erhöhter Temperatur, d.h. bei einer Temperatur von 100% C bis 140% C, vorzugsweise 120% - 130% C, in schmelzflüssigen Zustand aufund anschliessend abgetragen, wobei der im Substrat aufgenommene Klebstoff anschliessend abkühlt und sich verfestigen kann, um sich bei Aufbringung der Bildfolie 10 auf einen Träger 15 zufolge der dabei eingetragenen Wärme wieder zu Klebzwecken zu verflüssigen und anschliessend zu erstarren. Fig. 2 zeigt in schematisierter Form eine Vorrichtung 16 zur Aufbringung einer Bildfolie 10 auf einen Träger 15 (z.B. eine Compact Disc). Sie zeigt den Träger 15 und einen Stempel 17, vorzugsweise aus Silikon, zwischen denen die Bildfolie 10 nach der Erfindung angeordnet ist. Vor oder während der Aufbringung wird die Bildfolie 10 erhitzt und durch Niederfahren des Stempels 17 mit dem Träger 15 verbunden, indem der durch die Erwärmung reaktivierte Klebstoff aus dem Substrat 13 herausgepresst wird. Der für die Verbindung notwendige Druck kann auch durch eine Walze (nicht gezeigt) auf die Bildfolie 10 aufgebracht werden. Die Drücke, die Stempel 17 oder eine Walze aufzubringen haben, liegen zwischen 0,75 kg pro mm2 und 1,5 kg pro mm2, vorzugsweise zwischen 1,0 kg pro mm2 und 1,2 kg pro mm2. Nach der Verklebung wird die Tragschicht 11 von der Klarlackschicht 12 abgezogen, so dass auf dem Träger 15 der Klebstoff, das Substrat 13 mit der das Substrat 13 überspannenden Klarlackschicht 12 als Schutzschicht für das Substrat 13 verbleibt.According to Fig. 1 For example, the image film 10 according to the invention comprises a base layer 11, a clearcoat layer 12 and toner substrates 13 representing print images (only one toner substrate is shown). The coating of the base layer 11 with the clearcoat 12 is carried out according to conventional techniques. The support layer 11 is preferably a film, preferably of a polyester or of a smooth-coated paper, with a thickness of 20 to 50 microns, preferably a thickness of 23 to 26 microns. The clearcoat layer 12 applied to the base layer 11 is formed of an acrylic paint. This acrylic lacquer is mixed with a release agent which favors the separation of the base layer 11 from the clearcoat 12 after printing has taken place. The release agent is preferably a vaporizable wax added to the acrylic varnish of the clearcoat layer 12 in proportions (weight) of 2% to 5%, preferably 2.5% to 3.5%. The printing process is carried out using heat and pressure, wherein the registered in image sheet 10 heat evaporates the wax. On the clearcoat film 11, the print images, ie, the toner transfer 13 representing toner images are applied. The application of the substrate 13 is preferably carried out by computer-controlled printers, which deposit toner particles according to color, quantity and the area of the printed image in accordance with a prescription or program stored in a computer (computer). The substrate 13 is applied the image surface of the substrate 13 intended for viewing is in engagement with the clearcoat layer. After application of the substrate or substrates 13 one or more substrates 13 carrying surface 12a over the entire surface, coated with a substrate 13 covering adhesive layer 14, which is then again all over, except in substrates 13 registered adhesive removed. Application and removal of the adhesive layer 14 take place by means of squeegee-like coating strips, which in the same direction of operation of the loading and unloading device successively withdraw liquid adhesive from a storage container in order to supply it to a receptacle after coating as such. The toner substrate 13 is characterized by a greater roughness and porosity than the clearcoat film 11, with the result that upon removal of the fully applied adhesive layer 14 adhesive of this layer is registered in the toner substrate 13 as there remaining and available adhesive supply. The adhesive is at elevated temperature, ie at a temperature of 100% C to 140% C, preferably 120% - 130% C, in the molten state aufund then removed, wherein the substrate received in the adhesive then cools and can solidify itself upon application of the image film 10 to a carrier 15, according to the heat introduced in the process, to liquefy again to adhesive purposes and then to solidify. Fig. 2 shows in schematic form a device 16 for applying a picture film 10 on a support 15 (eg a compact disc). It shows the carrier 15 and a punch 17, preferably of silicone, between which the image film 10 is arranged according to the invention. Before or during the application, the image film 10 heated and connected by depressing the punch 17 with the carrier 15 by the adhesive reactivated by the heating of the substrate 13 is pressed out. The pressure necessary for the connection can also be applied to the image film 10 by a roller (not shown). The pressures to apply the punch 17 or a roller are between 0.75 kg per mm 2 and 1.5 kg per mm 2 , preferably between 1.0 kg per mm 2 and 1.2 kg per mm 2 . After bonding, the support layer 11 is removed from the clearcoat 12, so that the substrate 13 with the clearcoat layer 12 spanning the substrate 13 remains as a protective layer for the substrate 13 on the support 15.

Claims (10)

  1. Process for producing an image transfer film for transferring an image from the image transfer film on to an image carrier, including coating a backing layer (11) with a clear lacquer layer (12), applying toner substrates (13) which form an image, covering the clear lacquer layer (12) and the toner substrates (13) with an adhesive layer (14) of liquid adhesive, characterised in that, subsequent to the covering operation, the adhesive layer (14) is removed from the clear lacquer layer (12) and, during the removal operation, liquid adhesive is introduced into toner substrates (13).
  2. Process according to claim 1, characterised in that the backing layer (11) is in the form of a film made of polyester.
  3. Process according to either claim 1 or claim 2, characterised in that a layer made of acrylic lacquer is applied as the clear lacquer layer (12) to the backing layer (11).
  4. Image film consisting of a backing layer (11), a clear lacquer layer (12) applied to the backing layer (11), comprising dyes which form images and are applied to the clear lacquer layer (12), the dyes being in the form of toner substrates (13), the toner substrates (13) having a greater roughness and porosity than the clear lacquer layer (12), characterised in that the toner substrates (13) comprise adhesive which is mechanically introduced into the pores thereof and consolidated, which adhesive can be extruded from the toner substrate by means of reactivation by applying heat and pressure, connecting the image film to a carrier (15).
  5. Image film according to claim 4, characterised in that the backing layer (11) is formed from a film made of polyester or from smooth-coated paper.
  6. Image film according to claim 5, characterised in that the backing layer (11) has a thickness of between 20 and 50 µm, preferably a thickness of between 23 and 26 µm.
  7. Image film according to any of claims 4 to 6, characterised in that the clear lacquer layer (12) is formed from an acrylic lacquer.
  8. Image film according to claim 7, characterised in that a separating agent is added to the acrylic lacquer.
  9. Image film according to claim 7, characterised in that the separating agent is a vaporisable wax.
  10. Image film according to claim 9, characterised in that the separating agent is added to the acrylic lacquer in a proportion of between 2 % and 5 %, preferably between 2.5 % and 3.5 %.
EP20030405476 2002-06-27 2003-06-27 Process for the production of an image transfer sheet Expired - Lifetime EP1375189B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01115/02A CH695991A5 (en) 2002-06-27 2002-06-27 A process for preparing an image transfer sheet.
CH11152002 2002-06-27

Publications (2)

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EP1375189A1 EP1375189A1 (en) 2004-01-02
EP1375189B1 true EP1375189B1 (en) 2013-07-31

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EP20030405476 Expired - Lifetime EP1375189B1 (en) 2002-06-27 2003-06-27 Process for the production of an image transfer sheet

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US (1) US20040013881A1 (en)
EP (1) EP1375189B1 (en)
JP (1) JP2004050832A (en)
CA (1) CA2431300C (en)
CH (1) CH695991A5 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8236122B2 (en) 2008-10-14 2012-08-07 Neenah Paper, Inc. Heat transfer methods and sheets for applying an image to a colored substrate
CN102049955A (en) * 2009-11-06 2011-05-11 杨子德 Transfer film having stereo matt pattern and manufacturing method thereof

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Publication number Priority date Publication date Assignee Title
BE629735A (en) * 1962-03-21
GB1046411A (en) * 1964-02-04 1966-10-26 Letraset International Ltd Transfer materials
US3684545A (en) * 1969-11-07 1972-08-15 James D Worrall Thermosetting dry transfer
US3928710A (en) * 1970-04-29 1975-12-23 Letraset International Ltd Heat activated transfers
GB1364627A (en) * 1970-07-28 1974-08-21 Visutronic Ltd Transfer materials
DE2041865A1 (en) * 1970-08-24 1972-03-02 Ploss U Decorative transfer fixing to glass - employing adhesive applied just prior to sticking
GB1491678A (en) * 1974-01-16 1977-11-09 Marler Ltd E Dry transfer materials
US4064285A (en) * 1975-12-22 1977-12-20 Xerox Corporation Electrophotographic decalcomanias
US4216283A (en) * 1977-05-23 1980-08-05 Ani-Live Film Service Inc. Dry transfer of electrophotographic images
US4517044A (en) * 1981-11-18 1985-05-14 Advanced Graphic Technology Dry transfer decal and method of manufacture
JPS62169880A (en) * 1986-01-22 1987-07-27 Kanzaki Paper Mfg Co Ltd Manufacture of self-ashesive sheet
US4935300A (en) * 1988-04-13 1990-06-19 Dennison Manufacturing Company Heat transferable laminate
US5814402A (en) * 1993-04-20 1998-09-29 Decora Incorporated Pressure sensitive dry transfer graphics article and method of manufacture
JP3715734B2 (en) * 1997-01-21 2005-11-16 キヤノン株式会社 Image retransfer sheet
US5985503A (en) * 1997-03-11 1999-11-16 Agfa-Gevaert, N.V. Electrostatographic method for the production of transfer images
GB2330329B (en) * 1997-10-16 2001-11-14 Trip Productions B V Pattern printing of adhesives

Also Published As

Publication number Publication date
EP1375189A1 (en) 2004-01-02
CA2431300C (en) 2012-02-21
US20040013881A1 (en) 2004-01-22
CA2431300A1 (en) 2003-12-27
CH695991A5 (en) 2006-11-15
JP2004050832A (en) 2004-02-19

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