EP0590322A2 - Support for an image-receiving material for thermal dye diffusion transfer - Google Patents

Support for an image-receiving material for thermal dye diffusion transfer Download PDF

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Publication number
EP0590322A2
EP0590322A2 EP19930113782 EP93113782A EP0590322A2 EP 0590322 A2 EP0590322 A2 EP 0590322A2 EP 19930113782 EP19930113782 EP 19930113782 EP 93113782 A EP93113782 A EP 93113782A EP 0590322 A2 EP0590322 A2 EP 0590322A2
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Prior art keywords
material according
microspheres
intermediate layer
support material
image
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EP19930113782
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German (de)
French (fr)
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EP0590322A3 (en
EP0590322B1 (en
Inventor
Jürgen Dipl.-Ing. Graumann
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Felex Schoeller Jr and GmbH and Co KG
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Felex Schoeller Jr and GmbH and Co KG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/913—Material designed to be responsive to temperature, light, moisture
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/914—Transfer or decalcomania
    • 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
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24893—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
    • 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
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249987—With nonvoid component of specified composition
    • 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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/254—Polymeric or resinous material
    • 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
    • Y10T428/27—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
    • Y10T428/273—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.] of coating
    • 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
    • Y10T428/27—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
    • Y10T428/273—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.] of coating
    • Y10T428/277—Cellulosic substrate
    • 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
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • 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]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/3188—Next to cellulosic
    • Y10T428/31895—Paper or wood
    • Y10T428/31899—Addition polymer of hydrocarbon[s] only
    • Y10T428/31902—Monoethylenically unsaturated

Definitions

  • the object of the invention is to provide a carrier material for an image-receiving material for thermal sublimation processes which, regardless of the type and composition of the image-receiving layer, enables the printing of images with high color density and resolution with uniform color distribution in the area and without unprinted areas .
  • a base paper coated with polyethylene on both sides was used for the coating.
  • This paper is characterized by:
  • the carrier materials produced according to Examples 1 to 3 were also coated with other receiving layers.
  • the test results corresponded to the results obtained with the aid of the receiving layer described in Example 1.
  • “Mottle” here refers to an effect that manifests itself in a cloudy appearance in the printed material. It is assessed in an internal test on the basis of comparison pictures using a scale from 1 to 5, with a 1 for a very uniform and a 5 for a very cloudy appearance of the printed material.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

The invention relates to a process for the production of a support (carrier, substrate) material for an image-receiving material for thermal dye diffusion transfer, comprising a carrier and an interlayer containing microbeads, where the interlayer contains a film-forming binder having a minimum film-formation temperature of at least 25 DEG C and a pigment in the form of hollow polymeric microbeads, the microbeads having a cavity with a volume of between 10 and 55% of the total volume of the bead.

Description

Die Vorliegende Erfindung betrifft ein Trägermaterial für ein Bildempfangsmaterial für thermische Farbstoffdiffusionsübertragung (Dye Diffusion Thermal Transfer, D2T2), das einen Träger und eine Zwischenschicht enthält.The present invention relates to a carrier material for an image-receiving material for thermal dye diffusion transfer (Dye Diffusion Thermal Transfer, D2T2), which contains a carrier and an intermediate layer.

In den letzten Jahren wurde ein Verfahren der thermischen Farbstoffdiffusionsübertragung entwickelt, welches die Wiedergabe eines elektronisch erzeugten Bildes in Form einer "Hardcopy" ermöglicht. Das Prinzip eines solchen Verfahrens ist wie folgt. Ein digitales Bild wird hinsichtlich der Grundfarben Cyan, Magenta, Gelb und Schwarz aufbereitet und in entsprechende elektrische Signale umgewandelt, die dann in Wärme mittels eines Thermokopfs umgesetzt werden. Durch die Wärmeeinwirkung sublimiert der Farbstoff aus der Donorschicht eines im Kontakt mit dem Empfangsmaterial stehenden Farbbandes (Farbblattes) und diffundiert in die Empfangsschicht hinein.In recent years, a method of thermal dye diffusion transfer has been developed which enables the reproduction of an electronically generated image in the form of a "hard copy". The principle of such a procedure is as follows. A digital image is processed with regard to the basic colors cyan, magenta, yellow and black and converted into corresponding electrical signals, which are then converted into heat using a thermal head. Due to the action of heat, the dye sublimes from the donor layer of an ink ribbon (ink sheet) in contact with the receiving material and diffuses into the receiving layer.

Ein Empfangsmaterial für thermische Farbstoffübertragung besteht in der Regel aus einem Träger mit auf dessen Vorderseite aufgebrachter Empfangsschicht. Außer der Empfangsschicht werden oft noch andere Schichten auf die Vorderseite des Trägers aufgebracht. Dazu gehören beispielsweise Zwischenschichten wie Sperr-, Trenn-, Haftschichten u.ä. oder Schutzschichten.A receiving material for thermal dye transfer generally consists of a carrier with a receiving layer applied to its front. In addition to the receiving layer, other layers are often applied to the front of the carrier. These include, for example, intermediate layers such as barrier, separating, adhesive layers and the like. or protective layers.

Als Träger kann eine Kunststoffolie, z. B. Polyesterfilm oder ein beschichtetes Papier dienen.A plastic film, e.g. B. polyester film or coated paper.

Die Hauptkomponente der Empfangsschicht ist in der Regel ein thermoplastisches Harz, das eine Affinität zum Farbstoff aus dem Farbband aufweist. Hierfür können z.B. Kunststoffe mit Esterverbindungen (Polyesterharze, Polyacrylsäureesterharze, Polycarbonatharze, Polyvinylacetatharze und Styrolacrylatharze), Kunststoffe mit Amidbindungen (Polyamidharze) sowie Mischungen der aufgeführten Harze verwendet werden. Es können aber auch Copolymere eingesetzt werden, die als Hauptbestandteil mindestens eine der oben genannten Strukturen aufweisen, z.B. Vinylchlorid/Vinylacetat-Copolymer.The main component of the receiving layer is usually a thermoplastic resin that has an affinity for the dye from the ribbon. For this, e.g. Plastics with ester compounds (polyester resins, polyacrylic acid ester resins, polycarbonate resins, polyvinyl acetate resins and styrene acrylate resins), plastics with amide bonds (polyamide resins) and mixtures of the listed resins can be used. However, copolymers can also be used which have at least one of the structures mentioned above as the main constituent, e.g. Vinyl chloride / vinyl acetate copolymer.

Um Bilder hoher Qualität hinsichtlich optischer Dichte, Farbton (Gradationsreproduzierbarkeit) und Auflösung zu erreichen, werden an die Empfangsmaterialien folgende Anforderungen gestellt:

  • glatte Oberfläche
  • Hitzestabilität
  • Lichtstabilität
  • gute Farbstofflöslichkeit
  • gute Kratz- und Abriebfestigkeit
  • "anti-blocking"-Eigenschaften (kein Kleben)
Es ist bekannt, daß trotz Erreichung der oben genannten Eigenschaften qualitativ minderwertige Bilder entstehen können, was auf einen mangelnden Kontakt des Thermokopfs zur gegenüberliegenden Transportwalze im Printer zurückzuführen ist und sich in unbedruckten Stellen äußert. Um diesem Effekt vorzubeugen, wird an das Empfangsmaterial eine weitere Anforderung gestellt, bei der es sich um eine sog. Weichheit (Softness) handelt.In order to achieve high quality images in terms of optical density, color tone (gradation reproducibility) and resolution, the following requirements are placed on the receiving materials:
  • smooth surface
  • Heat stability
  • Light stability
  • good dye solubility
  • good scratch and abrasion resistance
  • "anti-blocking" properties (no sticking)
It is known that in spite of achieving the above-mentioned properties, low-quality images can arise, which can be attributed to a lack of contact of the thermal head with the opposite transport roller in the printer and is expressed in unprinted areas. In order to prevent this effect, a further requirement is placed on the receiving material, which is a so-called softness.

Ein weiches anschmiegsames Empfangsmaterial kann z.B. durch das Aufbringen einer die Funktion einer Polsterschicht erfüllenden Zwischenschicht hergestellt werden.A soft, supple receiving material can e.g. be produced by the application of an intermediate layer which fulfills the function of a cushion layer.

Dieses Problem soll in JP 62-146 693 durch das Aufbringen einer aus Styrol/Butadien- oder Vinylacetat-Latex bestehender Polsterschicht gelöst werden.This problem is to be solved in JP 62-146 693 by applying a cushion layer consisting of styrene / butadiene or vinyl acetate latex.

In einer anderen Patentschrift J 02-274 592 wird eine Zwischenschicht aus aufgeschäumtem Polypropylen aufgetragen.In another patent specification J 02-274 592, an intermediate layer made of foamed polypropylene is applied.

Das gleiche Problem soll in einer weiteren Patentschrift J 03-092 382 durch das Auftragen einer mikroporösen Harz-Zwischenschicht gelöst werden.The same problem is to be solved in a further patent specification J 03-092 382 by applying a microporous resin intermediate layer.

Ferner ist bekannt (J 03-110 195), in eine Polsterschicht einen kugelförmigen Füller, wie z.B. Polypropylen einzuarbeiten.It is also known (J 03-110 195) to incorporate a spherical filler, such as polypropylene, into a cushion layer.

In der DE 39 34 014 wird ein Empfangsmaterial vorgeschlagen, in dem eine poröse hitzeisolierende Schicht, die makromolekulare Mikrokugeln in Form von hohlen Harzteilchen und/oder heterogenen Harzteilchen enthält, auf ein Substrat aufgetragen wird.DE 39 34 014 proposes a receiving material in which a porous heat-insulating layer, which contains macromolecular microspheres in the form of hollow resin particles and / or heterogeneous resin particles, is applied to a substrate.

Nachteilig an diesem Empfangsmaterial ist die Porosität der Zwischenschicht. Dadurch können Farbstoffe aus der Empfangsschicht ins Innere der Unterlage eindringen, und das übertragene Bild erscheint unscharf.The disadvantage of this receiving material is the porosity of the intermediate layer. This allows dyes from the receiving layer to penetrate into the interior of the base, and the transferred image appears blurred.

Die Aufgabe der Erfindung besteht darin, ein Trägermterial für ein Bildempfangsmaterial für thermische Sublimationsverfahren zur Verfügung zu stellen, welches unabhängig von der Art und der Zusammensetzung der Bildempfangsschicht das Drucken von Bildern mit hoher Farbdichte und Auflösung bei gleichmäßiger Farbverteilung in der Fläche und ohne unbedruckte Stellen ermöglicht.The object of the invention is to provide a carrier material for an image-receiving material for thermal sublimation processes which, regardless of the type and composition of the image-receiving layer, enables the printing of images with high color density and resolution with uniform color distribution in the area and without unprinted areas .

Die Aufgabe wird durch eine Zwischenschicht gelöst, die ein filmbildendes Bindemittel mit einer minimalen Filmbildungstemperatur (MFFT) von mindestens 25°C und ein Pigment in Form von hohlen polymeren Mikrokugeln enthält, wobei die Mikrokugeln einen Innenraum aufweisen, dessen Volumen zwischen 10 und 55 % des gesamten Kugelkörpers beträgt. Insbesondere sind Mikrokugeln geeignet, deren Innenraum-Volumen 12,5 - 25 % des gesamten Kugelkörpers beträgt.The object is achieved by an intermediate layer which contains a film-forming binder with a minimum film-forming temperature (MFFT) of at least 25 ° C. and a pigment in the form of hollow polymeric microspheres, the microspheres having an interior whose volume is between 10 and 55% of the entire spherical body. Microspheres whose interior volume is 12.5-25% of the entire spherical body are particularly suitable.

Die hohlen Mikrokugeln weisen einen Durchmesser von 0,4 bis 1 µm auf, vorzugsweise 0,4 bis 0,6 µm.The hollow microspheres have a diameter of 0.4 to 1 µm, preferably 0.4 to 0.6 µm.

Die erfindungsgemäße Zwischenschicht wird auf ein polyolefinbeschichtetes Basispapier, insbesondere polyethylenschichtetes oder polypropylenbeschichtetes Basispapier aufgetragen.The intermediate layer according to the invention is applied to a polyolefin-coated base paper, in particular polyethylene-coated or polypropylene-coated base paper.

Das Material der hohlen Mikrokugeln ist ausgewählt aus Styrol-, Acryl- und/oder Styrol/AcrylCopolymer-Harzen.The material of the hollow microspheres is selected from styrene, acrylic and / or styrene / acrylic copolymer resins.

Es hat sich entgegen den zu erwartenden Effekten überraschenderweise gezeigt, daß bei einer Menge von 4 bis 30 Gew.-% Mikrokugeln in der Zwischenschicht eine hohe Auflösung der übertragenen Bilder sowie deren gleichmäßiges Erscheinungsbild ohne unbedruckte Stellen zu erreichen ist.Contrary to the effects to be expected, it has surprisingly been found that with a quantity of 4 to 30% by weight of microspheres in the intermediate layer, high resolution of the transferred images and their uniform appearance can be achieved without unprinted areas.

Darüber hinaus wird durch den Einsatz der erfindungsgemäßen Mikrokugeln eine gute Opazität des mit der Zwischenschicht beschichteten Materials erreicht, was zusätzlich die üblichen Rückseiten-Markierungen unsichtbar macht.In addition, by using the microspheres according to the invention, good opacity of the material coated with the intermediate layer is achieved, which additionally renders the customary rear side markings invisible.

Durch den Einsatz der erfindungsgemäßen Zwischenschicht wird eine gute Sperrwirkung zwischen Empfangsschicht und dem polyolefinbeschichteten Papierträger erreicht. Dadurch können Farbstoffe bei Wärmeeinwirkung nicht in die Papierunterlage diffundieren und von Stoffen aus der Polyolefinbeschichtung und dem Papier weitergeschleppt werden, was sich durch eine unscharfe Bilderscheinung äußert.By using the intermediate layer according to the invention, a good barrier effect between the receiving layer and the polyolefin-coated paper carrier is achieved. As a result, dyes cannot diffuse into the paper base when exposed to heat and are dragged along by substances from the polyolefin coating and the paper, which is manifested by a fuzzy image.

Das in der erfindungsgemäßen Zwischenschicht verwendete filmbildende Bindemittel mit einer minimalen Filmbildungstemperatur von mindestens 25°C ist ein in organischen Lösungsmitteln lösliches Harz aus der Gruppe der Acrylnitril-, Acrylsäureester-, Vinylchlorid-, Vinylacetat-, Vinylidenchlorid-, Polyamid-, Urethan-Homopolymere oder - Copolymere sowie Mischungen aus diesen Harzen.The film-forming binder used in the intermediate layer according to the invention with a minimum film-forming temperature at least 25 ° C is a solvent soluble in organic solvents from the group of acrylonitrile, acrylic acid ester, vinyl chloride, vinyl acetate, vinylidene chloride, polyamide, urethane homopolymers or copolymers and mixtures of these resins.

Besonders vorteilhaft hat sich eine Mischung erwiesen, welche neben den aufgeführten Bindemitteln stets Polyvinylidenchlorid enthält, wie z. B. eine Mischung aus Acrylat-Copolymer und Polyvinylidenchlorid, deren minimale Filmbildungstemperatur ca. 26°C beträgt.A mixture has proven to be particularly advantageous which, in addition to the listed binders, always contains polyvinylidene chloride, such as. B. a mixture of acrylate copolymer and polyvinylidene chloride, the minimum film formation temperature is about 26 ° C.

Außerdem kann die Zwischenschicht noch andere Zusatzstoffe wie Dispergierhilfsmittel, Trennmittel, Farbstoffe u.ä. Hilfsmittel enthalten.In addition, the intermediate layer can also contain other additives such as dispersing aids, release agents, dyes and the like. Tools included.

Die Zwischenschicht wird als eine wäßrige Dispersion mit Hilfe aller gebräuchlichen Auftrags- und Dosierungsverfahren wie z. B. Rakel-, Walzen-, Bürsten-, Gravur- oder Nipp-Verfahren auf den Träger aufgetragen und anschließend getrocknet. Die Auftragsmenge der getrockneten Schicht beträgt 0,5 - 50 g/m², insbesondere aber 2 - 10 g/m².The intermediate layer is an aqueous dispersion with the help of all common application and dosing methods such. B. squeegee, roller, brush, engraving or sip process applied to the carrier and then dried. The application amount of the dried layer is 0.5 - 50 g / m², but especially 2 - 10 g / m².

In einer besonderen Ausgestaltung der Erfindung wird auf die Rückseite des Empfangsmaterials eine Schicht aufgetragen, die das Abdrücken der Bilder auf die Rückseite des Materials verhindert. Diese Rückseitenschicht kann Bindemittel wie Stärke, Gelatine und andere Hilfsstoffe, wie z. B. Pigmente enthalten.In a special embodiment of the invention, a layer is applied to the back of the receiving material which prevents the images from being pressed onto the back of the material. This backing layer can contain binders such as starch, gelatin and other auxiliaries, such as. B. contain pigments.

Die Erfindung wird mit Hilfe der nachfolgenden Beispiele erläutert.The invention is explained with the aid of the following examples.

Beispiel 1example 1

Für die Beschichtung wurde ein beidseitig polyethylenbeschichtetes Basispapier eingesetzt. Dieses Papier ist gekennzeichnet durch:

Figure imgb0001
A base paper coated with polyethylene on both sides was used for the coating. This paper is characterized by:
Figure imgb0001

Die Vorderseite des auf Seite 7 beschriebenen Basispapiers wurde mit einer wäßrigen Dispersion folgender Zusammensetzung beschichtet und anschließend getrocknet:

Figure imgb0002
The front of the base paper described on page 7 was coated with an aqueous dispersion of the following composition and then dried:
Figure imgb0002

Sonstige VersuchsbedingungenOther test conditions

- Maschinengeschwindigkeit- machine speed 130 m/min130 m / min - Trocknungstemperatur- drying temperature 110° C110 ° C - Trocknungszeit- drying time 10 sek10 sec

Auf das mit der beschriebenen Zwischenschicht versehene Material wurde eine Empfangsschicht folgender Zusammensetzunmg aufgetragen: Vinylchlorid/Vinylacetat 50 %ig in Wasser 50 Gew.-% Vinylchlorid/Acrylsäuremethylester 50 %ig in Wasser 50 Gew.-% A receiving layer of the following composition was applied to the material provided with the intermediate layer described: Vinyl chloride / vinyl acetate 50% in water 50% by weight Vinyl chloride / acrylic acid methyl ester 50% in water 50% by weight

Die Auftragsmenge der Empfangsschicht betrug 6 g/m².The application amount of the receiving layer was 6 g / m².

Das auf diese Weise erhaltene Empfangsmaterial wurde unter Anwendung des thermischen Bildübertragungsverfahrens bedruckt und anschließend analysiert. Die Ergebnisse sind in Tabelle 1 zusammengestellt.The receiving material thus obtained was printed using the thermal image transfer method and then analyzed. The results are summarized in Table 1.

Beispiel 2Example 2

Ein PE-beschichtetes Basispapier wie im Beispiel 1 wurde mit einer wäßrigen Dispersion folgender Zusammensetzung beschichtet: Bestandteile Zusammensetzung, Gew.-% 2a 2b Acrylat-Copolymer 40 %ig in Wasser MFFT = 30°C (Primal HG 44, Rohm & Haas) 95 70 Polyvinylidenchlorid 55 %ig in Wasser MFFT = 18°C (Diofan 233 D, BASF) - 25 Hohle Mikrokugeln Typ A 5 5 Auftragsmenge, g/m² 8 8 A PE-coated base paper as in Example 1 was coated with an aqueous dispersion of the following composition: Components Composition,% by weight 2a 2 B Acrylate copolymer 40% in water MFFT = 30 ° C (Primal HG 44, Rohm & Haas) 95 70 Polyvinylidene chloride 55% in water MFFT = 18 ° C (Diofan 233 D, BASF) - 25th Hollow type A microspheres 5 5 Order quantity, g / m² 8th 8th

Das auf diese Weise hergestellte Trägermaterial wurde mit einer Bildempfangsschicht wie im Beispiel 1 beschichtet, anschließend bedruckt und analysiert. Die Ergebnisse sind in Tabelle 1 zusammengestellt.The support material produced in this way was coated with an image-receiving layer as in Example 1, then printed and analyzed. The results are summarized in Table 1.

Beispiel 3Example 3

Ein polypropylenbeschichtetes Basispapier wurde mit einer wäßrigen Dispersion folgender Zusammensetzung beschichtet: Vinylchlorid/Vinylacetat 50 %ig in Wasser MFFT = 26°C (30 Teile Vinnol 50 + 70 T. Vinnol 50/25C) 95 Gew.-% Hohle Mikrokugeln Typ A 40 %ig in Wasser (Ropaque OP-90, Rohm & Haas) 5 Gew.-% A polypropylene-coated base paper was coated with an aqueous dispersion of the following composition: Vinyl chloride / vinyl acetate 50% in water MFFT = 26 ° C (30 parts Vinnol 50 + 70 T. Vinnol 50 / 25C) 95% by weight Hollow microspheres type A 40% in water (Ropaque OP-90, Rohm & Haas) 5% by weight

Die Auftragsmenge betrug 8 g/m², bezogen auf das Trockengewicht der Schicht.The amount applied was 8 g / m², based on the dry weight of the layer.

Das Trägermaterial wurde ferner mit einer Empfangsschicht wie im Beispiel 1 versehen und anschließend bedruckt und analysiert (Tab. 1).The carrier material was further provided with a receiving layer as in Example 1 and then printed and analyzed (Tab. 1).

Die gemäß den Beispielen 1 bis 3 hergestellten Trägermaterialien wurden auch mit anderen Empfangsschichten beschichtet. Die Prüfergebnisse entsprachen in der Aussage den Ergebnissen, die mit Hilfe der in Beispiel 1 beschriebenen Empfangsschicht erhalten wurden.The carrier materials produced according to Examples 1 to 3 were also coated with other receiving layers. The test results corresponded to the results obtained with the aid of the receiving layer described in Example 1.

Vergleichsbeispiele V1 und V2Comparative examples V1 and V2

Ein polyethylenbeschichtetes Basispapier wurde wie im Beispiel 1 mit folgender Dispersion beschichtet: Bestandteile Zusammensetzung, Gew.-% V1 V2 Acrylat-Copolymer 40 %ig in Wasser MFFT = 30°C (Primal HG 44, Rohm & Haas) - 5 Ethylen/Vinylacetat/Vinylchlorid 50 %ig in Wasser MFFT = 7°C (Vinnapas CEF 10,Fa.Wacker) 95 - Mikrokugeln Typ A 5 95 Auftragsmenge, g/m² 8 8 A polyethylene-coated base paper was coated with the following dispersion as in Example 1: Components Composition,% by weight V1 V2 Acrylate copolymer 40% in water MFFT = 30 ° C (Primal HG 44, Rohm & Haas) - 5 Ethylene / vinyl acetate / vinyl chloride 50% in water MFFT = 7 ° C (Vinnapas CEF 10, Wacker) 95 - Type A microspheres 5 95 Order quantity, g / m² 8th 8th

Prüfung des gemäß der Beispiele und der Vergleichsbeispiele erhaltenen BildempfangsmaterialsExamination of the image-receiving material obtained according to the examples and the comparative examples

Das erfindungsgemäße Bildempfangsmaterial wurde einem thermischen Bildübertragungsverfahren unterzogen. Hierzu wurde ein Colour Video Printer VY-25 E der Fa. Hitachi eingesetzt unter Anwendung eines Hitachi-Farbbandes. Der Video-Printer hat folgende Daten: Bildspeicher PAL 1-Vollbild-Speicher Druckbild 64 Farbton-Bild Bildelemente: 540:620 Punkte Druckzeit 2 Minuten/Bild The image receiving material according to the invention was subjected to a thermal image transfer process. For this, a color video printer VY-25 E from Hitachi was used using a Hitachi ink ribbon. The video printer has the following data: Image storage PAL 1 full screen memory Printed image 64 color image elements: 540: 620 points Printing time 2 minutes / picture

Bei dem bedruckten Bildempfangsmaterial (Hardcopy) wurden die Farbdensität und die Strichschärfe gemessen. Außerdem wurde das Erscheinungsbild (Mottle- und Topping-Effekt) des bedruckten Materials visuell begutachtet.The color density and line sharpness of the printed image-receiving material (hard copy) were measured. In addition, the appearance (mottle and topping effect) of the printed material was assessed visually.

Die Densitätsmessungen wurde mit Hilfe des Original Reflection Densitometer SOS-45 durchgeführt. Die Messungen erfolgten für die Grundfarben Cyan, Magenta und Gelb. In der Tabelle sind jeweils Mittelwerte von Densitäten für alle drei Farben angegeben.The density measurements were carried out using the original reflection densitometer SOS-45. The measurements were carried out for the basic colors cyan, magenta and yellow. The table shows mean values for densities for all three colors.

Die Strichschärfe (Auflösung) wurde an Hand von in den Grundfarben geprinteten Testbildern ermittelt. Das Testbild zeigt gerade Linien, die sowohl horizontal als auch vertikal geprintet sind. Die Messung erfolgt mit einem Fadenzähler an drei Meßstellen. Daraus wird das arithmetische Mittel berechnet. Je kleiner der gemessene Wert der Strichbreite ist, desto höher ist die Schärfe des Bildes.The line sharpness (resolution) was determined on the basis of test images printed in the basic colors. The test image shows straight lines that are printed both horizontally and vertically. The measurement is carried out with a thread counter at three measuring points. The arithmetic mean is calculated from this. The smaller the measured value of the stroke width, the higher the sharpness of the image.

Die gleichen Messungen der Strichschärfe wurden durchgeführt, nachdem die Proben einem Alterungsschnelltest unterzogen wurden. Hierfür wurden die Proben im Trockenschrank bei 75°C für 24 Stunden belassen.The same line sharpness measurements were made after the samples were subjected to a rapid aging test. For this, the samples were left in the drying cabinet at 75 ° C. for 24 hours.

Mit "Mottle" wird hier ein Effekt bezeichnet, der sich durch eine Wolkigkeit im Erscheinungsbild des bedruckten Materials äußert. Er wird in einem internen Prüftest an Hand von Vergleichsbildern durch eine Notenskala von 1 bis 5 beurteilt, wobei die Note 1 für ein sehr gleichmäßiges und die Note 5 für ein sehr wolkiges Erscheinungsbild des bedruckten Materials stehen."Mottle" here refers to an effect that manifests itself in a cloudy appearance in the printed material. It is assessed in an internal test on the basis of comparison pictures using a scale from 1 to 5, with a 1 for a very uniform and a 5 for a very cloudy appearance of the printed material.

Auf die gleiche Weise, d.h. an Hand von Vergleichsbildern, wird auch der sog. "Topping"-Effekt visuell beurteilt. Mit "Topping" werden unbedruckte, weiße Stellen im Bild bezeichnet, die durch einen mangelnden Kontakt des Thermokopfs zur gegenüberliegenden Transportwalze im Printer zustande kommen. Die Note 1 steht für ein gleichmäßig bedrucktes Material, die Note 5 dagegen für ein Material mit vielen unbedruckten Stellen.In the same way, i.e. The so-called "topping" effect is also assessed visually on the basis of comparison images. "Topping" denotes unprinted, white areas in the image that are caused by insufficient contact of the thermal head with the opposite transport roller in the printer. The grade 1 stands for a uniformly printed material, while the grade 5 stands for a material with many unprinted areas.

Die in der Tabelle 1 zusammengestellten Ergebnisse zeigen, daß mit Hilfe des erfindungsgemäßen Trägermaterials ein Bildempfangsmaterial hergestellt werden kann, welches eine gute Bedruckbarkeit (s. "Mottle" und "Topping") aufweist und das Drucken von Bildern mit hoher Farbdensität und Auflösung erlaubt.

Figure imgb0003
The results summarized in Table 1 show that an image-receiving material can be produced with the support material according to the invention, which has good printability (see "Mottle" and "Topping") and allows the printing of images with high color density and resolution.
Figure imgb0003

Claims (10)

Trägermaterial für ein Bildempfangsmaterial für thermische Farbstoffdiffusionsübertragung, bestehend aus einem Träger und einer Mikrokugeln enthaltenden Zwischenschicht, dadurch gekennzeichnet, daß die Zwischenschicht ein filmbildendes Bindemittel mit einer minimalen Filmbildungstemperatur von mindestens 25° C und ein Pigment in Form von hohlen polymeren Mikrokugeln enthält, wobei die Mikrokugeln einen Innenraum aufweisen, dessen Volumen zwischen 10 und 55 % des gesamten Kugelkörpers beträgt.Support material for an image-receiving material for thermal dye diffusion transfer, consisting of a support and an intermediate layer containing microspheres, characterized in that the intermediate layer contains a film-forming binder with a minimum film-forming temperature of at least 25 ° C and a pigment in the form of hollow polymeric microspheres, the microspheres have an interior whose volume is between 10 and 55% of the entire spherical body. Trägermaterial nach Anspruch 1, dadurch gekennzeichnet, daß das Innenraum-Volumen der Mikrokugeln 12,5 bis 25 % des gesamten Kugelkörpers beträgt.Support material according to claim 1, characterized in that the interior volume of the microspheres is 12.5 to 25% of the entire spherical body. Trägermaterial nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die hohlen Mikrokugeln einen Durchmesser von 0,4 bis 1 µm aufweisen.Support material according to claims 1 and 2, characterized in that the hollow microspheres have a diameter of 0.4 to 1 µm. Trägermaterial nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die Menge der Mikrokugeln in der Zwischenschicht 4 bis 30 Gew.-% beträgt.Support material according to claims 1 to 3, characterized in that the amount of microspheres in the intermediate layer is 4 to 30% by weight. Trägermaterial nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß die hohlen polymeren Mikrokugeln aus Styrol-, Acryl- und/oder Styrol/Acryl-Copolymer-Harz bestehen.Support material according to claim 1 to 4, characterized in that the hollow polymeric microspheres of styrene, acrylic and / or styrene / acrylic copolymer resin. Trägermaterial nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß das Bindemittel ein Harz aus der Gruppe der Polyacrylnitril-, Polyvinylchlorid-, Polyvinylacetat-, Polyvinylidenchlorid-, Polyamid-, Melamin-, Polyurethanharze oder eine Mischung aus diesen ist.Backing material according to claims 1 to 5, characterized in that the binder is a resin from the group of polyacrylonitrile, polyvinyl chloride, polyvinyl acetate, polyvinylidene chloride, polyamide, melamine, polyurethane resins or a mixture of these. Trägermaterial nach Anspruch 6, dadurch gekennzeichnet, daß das Bindemittel eine Polyvinylidenchlorid enthaltende Mischung ist.Support material according to claim 6, characterized in that the binder is a mixture containing polyvinylidene chloride. Trägermaterial nach Anspruch 1 bis 7, dadurch gekennzeichnet, daß die Zwischenschicht auf ein polyolefinbeschichtetes Basispapier aufgetragen ist.Backing material according to Claims 1 to 7, characterized in that the intermediate layer is applied to a polyolefin-coated base paper. Trägermaterial nach Anspruch 1 bis 8, dadurch gekennzeichnet, daß die Auftragsmenge der Zwischenschicht 0,5 bis 50 g/m², insbesondere 2 bis 10 g/m², beträgt.Support material according to claims 1 to 8, characterized in that the application amount of the intermediate layer is 0.5 to 50 g / m², in particular 2 to 10 g / m². Trägermaterial nach Anspruch 1 bis 9, dadurch gekennzeichnet, daß auf die Zwischenschicht eine Empfangsschicht aufgetragen ist.Support material according to claims 1 to 9, characterized in that a receiving layer is applied to the intermediate layer.
EP19930113782 1992-10-01 1993-08-28 Support for an image-receiving material for thermal dye diffusion transfer Expired - Lifetime EP0590322B1 (en)

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EP0742486A1 (en) * 1995-05-10 1996-11-13 Felix Schoeller jr Foto- und Spezialpapiere GmbH & Co. KG Support for forming colour proofs in the analogic proof system
DE19615650A1 (en) * 1996-04-19 1997-10-23 Pelikan Produktions Ag Thermal sublimation printing system with reduced number of layers
EP0850780A1 (en) * 1996-12-27 1998-07-01 Dai Nippon Printing Co., Ltd. Thermal transfer image receiving sheet and method of manufacturing same
EP1216839A1 (en) * 2000-12-20 2002-06-26 Sihl Ink jet recording material
WO2004076194A1 (en) * 2003-02-26 2004-09-10 Eastman Kodak Company Thermal dye-transfer receiving element with microvoided substrate
EP2000318A1 (en) * 2004-07-08 2008-12-10 Oji Paper Co., Ltd. Thermal Transfer Receptive Sheet

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US5858603A (en) * 1995-05-10 1999-01-12 Becker; Dieter Support material for making color test prints in the analog proof system
DE19615650A1 (en) * 1996-04-19 1997-10-23 Pelikan Produktions Ag Thermal sublimation printing system with reduced number of layers
DE19615650C2 (en) * 1996-04-19 2001-04-26 Pelikan Produktions Ag Egg Sublimation printing system
EP0850780A1 (en) * 1996-12-27 1998-07-01 Dai Nippon Printing Co., Ltd. Thermal transfer image receiving sheet and method of manufacturing same
EP1216839A1 (en) * 2000-12-20 2002-06-26 Sihl Ink jet recording material
WO2004076194A1 (en) * 2003-02-26 2004-09-10 Eastman Kodak Company Thermal dye-transfer receiving element with microvoided substrate
EP2000318A1 (en) * 2004-07-08 2008-12-10 Oji Paper Co., Ltd. Thermal Transfer Receptive Sheet
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DE4233018A1 (en) 1994-04-07

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