EP0683057A1 - Paper for thermal image transfer to flat porous surfaces - Google Patents

Paper for thermal image transfer to flat porous surfaces Download PDF

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Publication number
EP0683057A1
EP0683057A1 EP95106784A EP95106784A EP0683057A1 EP 0683057 A1 EP0683057 A1 EP 0683057A1 EP 95106784 A EP95106784 A EP 95106784A EP 95106784 A EP95106784 A EP 95106784A EP 0683057 A1 EP0683057 A1 EP 0683057A1
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EP
European Patent Office
Prior art keywords
paper
paper according
copolymer
ethylene
dye
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95106784A
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German (de)
French (fr)
Other versions
EP0683057B1 (en
Inventor
Rainer Dr. Dipl.-Chem. Gumbiowski
Rolf Dr. Dipl.-Chem. Ebisch
Hartmut Dr. Dipl.-Ing. Schulz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Felix Schoeller Jr Foto und Spezialpapiere GmbH
Original Assignee
Felix Schoeller Jr Foto und Spezialpapiere GmbH
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Publication date
Priority claimed from DE4417520A external-priority patent/DE4417520C1/en
Application filed by Felix Schoeller Jr Foto und Spezialpapiere GmbH filed Critical Felix Schoeller Jr Foto und Spezialpapiere GmbH
Publication of EP0683057A1 publication Critical patent/EP0683057A1/en
Application granted granted Critical
Publication of EP0683057B1 publication Critical patent/EP0683057B1/en
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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
    • G03G7/0053—Intermediate layers for image-receiving members
    • 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
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5254—Macromolecular coatings characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6588—Apparatus which relate to the handling of copy material characterised by the copy material, e.g. postcards, large copies, multi-layered materials, coloured sheet material
    • G03G15/6591—Apparatus which relate to the handling of copy material characterised by the copy material, e.g. postcards, large copies, multi-layered materials, coloured sheet material characterised by the recording material, e.g. plastic material, OHP, ceramics, tiles, textiles
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
    • G03G7/0006—Cover layers for image-receiving members; Strippable coversheets
    • G03G7/002—Organic components thereof
    • G03G7/0026—Organic components thereof being macromolecular
    • G03G7/004—Organic components thereof being macromolecular obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00443—Copy medium
    • G03G2215/00523—Other special types, e.g. tabbed
    • G03G2215/00527—Fabrics, e.g. textiles

Definitions

  • the invention relates to a paper for thermal image transmission on flat porous surfaces such as textiles.
  • a disadvantage of this transfer paper is the silicone coating. During the removal process after the image transfer, in which the silicone-coated paper is peeled off from the textile base, silicone residues stick to the fibers of the textile base. Furthermore, the fastness to washing of the images transferred to the textile material is unsatisfactory.
  • DE 42 10 976 A1 also relates to methods for transferring images on print templates to fabrics, this publication being a print template describes, which either consists of siliconized paper, and therefore has the disadvantages described above, or the print template is coated with a mixture of ethylene / vinyl acetate and paraffin wax. With regard to the detachment process after the image transfer, the printing templates coated with paraffin also proved to be disadvantageous.
  • EP 0 479 882 A1 describes a method and the associated transfer paper for transferring representations to a porous base, the paper consisting of coated, embossed paper containing a PE layer.
  • the images to be transferred are printed on the paper by dry copying and then transferred to the textile base by the action of heat and pressure.
  • a disadvantage of the transfer paper is the insufficient color density of the images transferred onto the base with the aid of this paper.
  • EP 0 466 503 A1 describes an image carrier for use in image transmission methods made of a flexible web material and two layers applied thereon.
  • the first layer formed directly on the sheet material is a polymeric layer based on ethylene or an acrylic varnish
  • the second layer formed on the first layer is a thermoplastic layer.
  • paper for thermal image transfer to flat porous surfaces characterized by a paper support and a layer formed thereon, which contains an ethylene copolymer or an ethylene copolymer mixture and a dye-receiving layer.
  • the ethylene copolymer contains in particular 10 to 35 mol% of another monomer.
  • the ethylene copolymer can in particular be an ethylene / vinyl acetate copolymer or an ethylene / (meth) acrylic acid alkyl ester copolymer. A mixture of these copolymers can also be used.
  • the content of the vinyl acetate or (meth) acrylic acid alkyl ester in the ethylene copolymer is 10 to 35 mol% in the particular embodiment of the invention.
  • the ethylene / (meth) acrylic acid alkyl ester copolymer can be selected from the group of the following copolymers: ethylene / methyl / (meth) acrylate, ethylene / ethyl (meth) acrylate, ethylene / propyl (meth) acrylate, ethylene / n-butyl (meth ) acrylate or ethylene / isobutyl (meth) acrylate and mixtures of these.
  • the layer containing the ethylene copolymer is extruded onto a carrier paper.
  • the application weight of the layer is 10 to 50 g / m2. Before the Extrusion coating exposes the paper surface to a corona discharge.
  • Any paper can be used as backing paper.
  • a highly sized neutral base paper with a basis weight of 60 to 200 g / m2 is particularly suitable.
  • the base paper can be surface-sized with starch or polyvinyl alcohol and has a surface smoothness of 20 to 300 Bekk on both sides. out.
  • the dye-receiving layer applied to the layer containing an ethylene copolymer contains a polymer having a low film-forming temperature.
  • This polymer can in particular be an acrylic acid ester copolymer, a styrene / butadiene or acrylonitrile / butadiene latex.
  • acrylic acid ester copolymer a styrene / butadiene or acrylonitrile / butadiene latex.
  • other polymers which have a good affinity for the dyes or toners used for printing can also be used.
  • the dye-receiving layer can additionally contain an anti-adhesive.
  • Finely divided silicas in particular an aluminum-doped finely dispersed silicic acid, are particularly suitable for this.
  • the paper properties with regard to the stackability and the smooth, trouble-free passage during reproduction on the paper can be considerably improved if the dye-receiving layer additionally contains inorganic and / or organic pigments.
  • Hollow or solid resin particles from the styrene family such as polystyrene, or from acrylic resin, such as polymethyl methacrylate, or resins from a styrene / acrylic acid (ester) copolymer are particularly suitable for this purpose.
  • Starch which is to be regarded as a pigment, is also suitable because it is stirred directly into the coating solution and suspended in it.
  • Suitable inorganic pigments are, for example, TiO2, CaCo3, ZnO, ZnS, ZnSO4, Sb2O3, CaSO4, kaolin, talc or mixtures thereof.
  • the amount of pigment in the ink-receiving layer is 10 to 90% by weight, in particular 30 to 70% by weight, based on the dry layer.
  • the properties mentioned are assessed by measuring a so-called friction coefficient. This is measured in a tensile test court based on the Frank principle.
  • the use of the pigments in the dye-absorbing layer leads to friction coefficients of less than 4N.
  • the friction coefficient is the force to be used to move the back of a sheet against the front.
  • the dye-receiving layer is applied from an aqueous coating solution. All common application and dosing methods can be used for this.
  • the application weight of the dye-receiving layer is 0.1 to 0.5 g / m2.
  • the surface of the paper according to the invention can be created with the aid of non-impact processes, such as laser printers Print and copy with any motif that can then be transferred to all synthetic or natural fabrics, but also to other flat objects.
  • the paper provided with a motif is brought into contact with a flat base. The transfer takes place through heat (130 - 180 ° C) and pressure (34.5 x 104N / m2), and only the backing paper is then removed from the base. The transferred image penetrates completely into the fibers of the base.
  • the front of a neutral sized base paper with a basis weight of 80 g / m 2 was extrusion coated after corona pretreatment with the copolymers or copolymer mixtures given in the following table and then with an aqueous dispersion of a carboxylated styrene / butadiene copolymer (4.5% by weight Solids content) coated and dried (application weight 0.2 g / m2).
  • Copolymer Composition % by weight 1a 1b 1c 1d 1e 1f Ethylene / vinyl acetate with 33 mol% vinyl acetate (ELVAX 150-W, Du Pont) 100 - - - - - - Ethylene / vinyl acetate with 28 mol% vinyl acetate (Evatane 28/40, Elf Atochem) - 100 - - - 25th Ethylene / vinyl acetate with 14 mol% vinyl acetate (Escorene Ultra 00714, Exxon) - - 100 - - - Ethylene / n-butyl acrylate with 35 mol% n-butyl acrylate (Enathene EA 80808, Quantum) - - - 100 - 75 Ethylene / methyl acrylate with 15 mol% methyl acrylate (Lotryl 15 MA 03, Elf Atochem) - - - - 100 -
  • Papers coated in this way were provided with images in a copying process (laser printer) and then brought into contact with a textile base (fabric made of 100% cotton) in a press in which heat (180 ° C.) and pressure (34.5 ⁇ 104 N / m2) the images were transferred to the textile base. After the transfer, the paper base was peeled off.
  • the printed textile underlay was washed at 30 ° C with conventional detergents and then examined.
  • the paper coated with ethylene / vinyl acetate copolymer (28 mol% vinyl acetate) was coated with the following aqueous dispersions: Components Composition,% by weight 2a 2 B 2c 2d Acrylic acid ester / vinyl acetate / vinyl chloride copolymer 50% disp. (Acronal 300 D, BASF) 10th - 10th - Carboxylated acrylic acid ester 32% disp. (Carboset XPD 1242, Goodrich) - 15 - - Carboxyl. Styrene / butadiene latex, 50% disp.
  • the coating compositions were applied to the surface to be coated using a scoop roller system, metered with a smooth doctor blade and dried in a hot air duct at air temperatures of approximately 80.degree.
  • the machine speed was 100 m / min.
  • the papers coated in this way were imaged in a copying process and then brought into contact with a textile base as in Example 1. After the image had been transferred, the paper backing was removed from the textile base.
  • the printed textile underlay was washed at 30 ° C and then examined.
  • a transfer paper produced according to EP 0 479 882 was provided with images as in Example 1 and used for image transfer to a textile base as in Example 1.
  • the papers produced according to the examples were imaged using a laser printer and then brought into contact with a textile base. After the image had been transferred, the color density was measured on the printed textile base.
  • the density measurements were made before and after a washing process with conventional detergents at 30 ° C.
  • the device used for this was an original reflection densitometer SOS-45.
  • the measurements were carried out for the basic colors yellow, cyan, magenta and black.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Textile Engineering (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Laminated Bodies (AREA)
  • Paper (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)

Abstract

Polymer-coated paper (I) for thermal image transfer onto porous sheets consists of a paper base (A) coated with a layer (B) of ethylene copolymer or copolymer mixt. (II) and a dye-absorbing layer (C).

Description

Die Erfindung betrifft ein Papier für thermische Bildübertragung auf flächige poröse Oberflächen wie Textilien.The invention relates to a paper for thermal image transmission on flat porous surfaces such as textiles.

Es gibt verschiedene Verfahren, die es erlauben, individuelle, persönliche Bilder oder Motive auf Textilien zu übertragen.There are various methods that allow individual, personal images or motifs to be transferred to textiles.

Eines dieser Verfahren ist in der DE 26 53 654 A1 beschrieben. Hiebei handelt es sich um die Schaffung langlebiger, auf xerografische Weise erzeugter Bilder auf Tuch. Diese Aufgabe wird durch die Herstellung einer siliconbeschichteten Bahn mit einer darauf nachgeordneten Überzugsschicht, auf der das Bild xerografisch erzeugt werden soll, gelöst. Das Tonerbild auf der Überzugsschicht kann weiter durch Wärme- und Druckeinwirkung in einer Laminierungspresse bei ca. 180°C innerhalb von 30 Sekunden auf das Textilgut übertragen werden.One of these methods is described in DE 26 53 654 A1. This is the creation of long-lasting, xerographically created images on cloth. This object is achieved by producing a silicon-coated web with a subsequent coating layer on which the image is to be generated xerographically. The toner image on the coating layer can be further transferred to the textile material within 30 seconds by the action of heat and pressure in a lamination press at approx. 180 ° C.

Nachteilig an diesem Übertragungspapier ist die Siliconbeschichtung. Beim Ablösevorgang nach der Bildübertragung, bei dem das siliconbeschichtete Papier von der Textilunterlage abgezogen wird, bleiben Siliconreste auf den Fasern der Textilunterlage haften. Ferner ist die Waschechtheit der auf das Textilgut übertragenen Bilder unbefriedigend.A disadvantage of this transfer paper is the silicone coating. During the removal process after the image transfer, in which the silicone-coated paper is peeled off from the textile base, silicone residues stick to the fibers of the textile base. Furthermore, the fastness to washing of the images transferred to the textile material is unsatisfactory.

Auch die DE 42 10 976 A1 betrifft Verfahren zum Übertragen von auf Druckvorlagen befindlichen Abbildungen auf Stoffe, wobei diese Druckschrift eine Druckvorlage beschreibt, die entweder aus silikonisiertem Papier besteht, und deshalb die zuvor beschriebenen Nachteile aufweist, oder aber die Druckvorlage mit einer Mischung aus Ethylen/Vinylacetat und Paraffinwachs beschichtet ist. Im Hinblick auf den Ablösevorgang nach der Bildübertragung erwiesen sich auch die mit Paraffin beschichteten Druckvorlagen als nachteilig.DE 42 10 976 A1 also relates to methods for transferring images on print templates to fabrics, this publication being a print template describes, which either consists of siliconized paper, and therefore has the disadvantages described above, or the print template is coated with a mixture of ethylene / vinyl acetate and paraffin wax. With regard to the detachment process after the image transfer, the printing templates coated with paraffin also proved to be disadvantageous.

In der EP 0 479 882 A1 wird ein Verfahren sowie das dazugehörige Übertragungspapier zum Übertragen von Darstellungen auf eine poröse Unterlage beschrieben, wobei das Papier aus einem gestrichenen, eine PE-Schicht enthaltenden Prägerpapier besteht. Die zu übertragenden Bilder werden auf das Papier durch Trockenkopieren gedruckt und anschließend durch Wärme- und Druckeinwirkung auf die Textilunterlage übertragen.EP 0 479 882 A1 describes a method and the associated transfer paper for transferring representations to a porous base, the paper consisting of coated, embossed paper containing a PE layer. The images to be transferred are printed on the paper by dry copying and then transferred to the textile base by the action of heat and pressure.

Nachteilig an dem Übertragungspapier ist die unzureichende Farbdensität der mit Hilfe dieses Papiers auf die Unterlage übertragenen Bilder.A disadvantage of the transfer paper is the insufficient color density of the images transferred onto the base with the aid of this paper.

Die EP 0 466 503 A1 beschreibt einen Bildträger zur Verwendung in Bildübertragungsverfahren aus einem flexiblen Bahnmaterial und zwei darauf aufgebrachten Schichten. Die erste Schicht, die direkt auf dem Bahnmaterial ausgebildet ist, ist eine polymere Schicht auf der Basis von Ethylen oder eines Acryllacks, die zweite auf der ersten Schicht ausgebildete Schicht ist eine thermoplastische Schicht. Bei der Übertragung des Bilds auf das textile Substrat geht die thermoplastische auf dasselbe über, während das flexible Bahnmaterial mit der polymeren Beschichtung abgetrennt wird.EP 0 466 503 A1 describes an image carrier for use in image transmission methods made of a flexible web material and two layers applied thereon. The first layer formed directly on the sheet material is a polymeric layer based on ethylene or an acrylic varnish, the second layer formed on the first layer is a thermoplastic layer. When the image is transferred to the textile substrate, the thermoplastic passes over to it, while the flexible web material with the polymer coating is separated.

Es ist die Aufgabe der Erfindung, ein Papier zu entwickeln, mit dessen Hilfe xerografisch erzeugte Tonerbilder oder durch thermische Verfahren erzeugte Bilder auf flächige poröse Oberflächen, insbesondere Textilunterlagen, mit hoher Farbdensität und Auflösung übertragen werden können.It is the object of the invention to develop a paper with the aid of which xerographically generated toner images or images generated by thermal processes can be transferred to flat porous surfaces, in particular textile substrates, with high color density and resolution.

Gelöst wird diese Aufgabe durch ein Papier für die thermische Bildübertragung auf flächige poröse Oberflächen, gekennzeichnet durch einen Papierträger und eine darauf ausgebildete Schicht, die ein Ethylen-Copolymer oder ein Ethylen-Copolymergemisch und eine farbstoffaufnehmende Schicht enthält.This object is achieved by paper for thermal image transfer to flat porous surfaces, characterized by a paper support and a layer formed thereon, which contains an ethylene copolymer or an ethylene copolymer mixture and a dye-receiving layer.

Das Ethylen-Copolymer enthält insbesondere 10 bis 35 Mol% eines weiteren Monomers.The ethylene copolymer contains in particular 10 to 35 mol% of another monomer.

Das Ethylen-Copolymer kann insbesondere ein Ethylen/Vinylacetat-Copolymer oder ein Ethylen/(Meth)acrylsäurealkylester-Copolymer sein. Abe auch eine Mischung dieser Copolymere kann eingesetzt werden.The ethylene copolymer can in particular be an ethylene / vinyl acetate copolymer or an ethylene / (meth) acrylic acid alkyl ester copolymer. A mixture of these copolymers can also be used.

Der Gehalt des Vinylacetats oder des (Meth)acrylsäurealkylesters im Ethylen-Copolymer beträgt in der besonderen Ausgestaltung der Erfindung 10 bis 35 Mol.%.The content of the vinyl acetate or (meth) acrylic acid alkyl ester in the ethylene copolymer is 10 to 35 mol% in the particular embodiment of the invention.

Das Ethylen/(Meth)acrylsäurealkylester-Copolymer kann aus der Gruppe folgender Copolymere ausgewählt werden: Ethylen/Methyl/(meth)acrylat, Ethylen/Ethyl(meth)acrylat, Ethylen/Propyl(meth)acrylat, Ethylen/n-Butyl(meth)acrylat oder Ethylen/iso-Butyl(meth)acrylat sowie Mischungen aus diesen.The ethylene / (meth) acrylic acid alkyl ester copolymer can be selected from the group of the following copolymers: ethylene / methyl / (meth) acrylate, ethylene / ethyl (meth) acrylate, ethylene / propyl (meth) acrylate, ethylene / n-butyl (meth ) acrylate or ethylene / isobutyl (meth) acrylate and mixtures of these.

Die das Ethylen-Copolymer enthaltende Schicht wird auf ein Trägerpapier aufextrudiert. Das Auftragsgewicht der Schicht beträgt 10 bis 50 g/m². Vor der Extrusionsbeschichtung wird die Papieroberfläche einer Coronaentladung ausgesetzt.The layer containing the ethylene copolymer is extruded onto a carrier paper. The application weight of the layer is 10 to 50 g / m². Before the Extrusion coating exposes the paper surface to a corona discharge.

Als Trägerpapier kann jedes Papier eingesetzt werden. Insbesondere jedoch geeignet ist ein hochgeleimtes neutrales Basispapier mit einem Flächengewicht von 60 bis 200 g/m². Das Basispapier kann mit Stärke oder Polyvinylalkohol oberflächengeleimt sein und weist von beiden Seiten eine Oberflächenglätte von 20 bis 300 Bekk. aus.Any paper can be used as backing paper. A highly sized neutral base paper with a basis weight of 60 to 200 g / m² is particularly suitable. The base paper can be surface-sized with starch or polyvinyl alcohol and has a surface smoothness of 20 to 300 Bekk on both sides. out.

Die auf der ein Ethylen-Copolymer enthaltenden Schicht aufgebrachte farbstoffaufnehmende Schicht enthält ein Polymer mit niedriger Filmbildungstemperatur.The dye-receiving layer applied to the layer containing an ethylene copolymer contains a polymer having a low film-forming temperature.

Dieses Polymer kann insbesondere ein Acrylsäureester-Copolymer, ein Styrol/Butadien- oder Acrylnitril/Butadien-Latex sein. Aber auch andere Polymere, die eine gute Affinität zu den zum Bedrucken verwendeten Farbstoffen oder Tonern aufweisen, können eingesetzt werden.This polymer can in particular be an acrylic acid ester copolymer, a styrene / butadiene or acrylonitrile / butadiene latex. However, other polymers which have a good affinity for the dyes or toners used for printing can also be used.

In einer anderen Ausgestaltung der Erfindung kann die farbstoffaufnehmende Schicht zusätzlich ein Antihaftmittel enthalten. Besonders gut geeignet sind hierfür feinteilige Kieselsäuren, insbesondere eine Aluminium-dotierte feindisperse Kieselsäure.In another embodiment of the invention, the dye-receiving layer can additionally contain an anti-adhesive. Finely divided silicas, in particular an aluminum-doped finely dispersed silicic acid, are particularly suitable for this.

Es hat sich gezeigt, daß sich die Papiereigenschaften im Hinblick auf die Stapelfähigkeit und den gleichmäßigen störungsfreien Durchlauf während der Reproduktion auf das Papier noch erheblich verbessern lassen, wenn die farbstoffaufnehmende Schicht zusätzlich anorganische und/oder organische Pigmente enthält.It has been shown that the paper properties with regard to the stackability and the smooth, trouble-free passage during reproduction on the paper can be considerably improved if the dye-receiving layer additionally contains inorganic and / or organic pigments.

Insbesondere geeignet sind hierfür hohle oder feste Harzpartikeln aus der Styrolfamilie, wie Polystyrol, oder aus Acrylharz, wie Polymethylmethacrylat, oder Harze aus einem Styrol/Acrylsäure(ester)-copolymer.Hollow or solid resin particles from the styrene family, such as polystyrene, or from acrylic resin, such as polymethyl methacrylate, or resins from a styrene / acrylic acid (ester) copolymer are particularly suitable for this purpose.

Ebenfalls geeignet ist Stärke, die als Pigment zu betrachten ist, weil sie direkt in die Beschichtungslösung eingerührt wird und drin suspendiert ist.Starch, which is to be regarded as a pigment, is also suitable because it is stirred directly into the coating solution and suspended in it.

Geeignete anorganische Pigmente sind beispielsweise TiO₂, CaCo₃, ZnO, ZnS, ZnSO₄, Sb₂O₃, CaSO₄, Kaolin, Talkum oder Mischungen daraus.Suitable inorganic pigments are, for example, TiO₂, CaCo₃, ZnO, ZnS, ZnSO₄, Sb₂O₃, CaSO₄, kaolin, talc or mixtures thereof.

Die Menge des Pigments in der farbempfangenden Schicht beträgt 10 bis 90 Gew.%, insbesondere 30 bis 70 Gew.%, bezogen auf die trockene Schicht.The amount of pigment in the ink-receiving layer is 10 to 90% by weight, in particular 30 to 70% by weight, based on the dry layer.

Die genannten Eigenschaften werden durch Messung eines sogenannten Friktionskoeffizienten beurteilt. Dieser wird in einem Zugkraftprüfgericht nach dem Frank-Prinzip gemessen. Der Einsatz der Pigmente in der farbstoffaufnehmenden Schicht führt zu Friktionskoeffizienten von kleiner als 4N. Der Friktionskoeffizient ist die Kraft, die aufzuwenden ist, um die Rückseite eines Blatts gegen die Vorderseite zu verschieben.The properties mentioned are assessed by measuring a so-called friction coefficient. This is measured in a tensile test court based on the Frank principle. The use of the pigments in the dye-absorbing layer leads to friction coefficients of less than 4N. The friction coefficient is the force to be used to move the back of a sheet against the front.

Die farbstoffaufnehmende Schicht wird aus einer wäßrigen Beschichtungslösung aufgetragen. Hierzu können alle gebräuchlichen Auftrags- und Dosierverfahren verwendet werden. Das Auftragsgewicht der farbstoffaufnehmenden Schicht beträgt 0,1 bis 0,5 g/m².The dye-receiving layer is applied from an aqueous coating solution. All common application and dosing methods can be used for this. The application weight of the dye-receiving layer is 0.1 to 0.5 g / m².

Die Oberfläche des erfindungsgemäßen Papiers läßt sich mit Hilfe von non-impact-Verfahren, wie z.B. Laserdrucker und -Kopierer mit jedem beliebigen Motiv bedrucken, das anschließend auf alle synthetische oder natürliche Gewebe, aber auch auf andere flächige Gegenstände übertragen werden kann. Hierzu wird das mit einem Motiv versehene Papier mit einer flächigen Unterlage in Kontakt gebracht. Die Übertragung findet durch Wäreme (130 - 180°C) und Druckeinwirkung (34,5 x 10⁴N/m²) statt, und nur das Trägerpapier wird danach von der Unterlage abgezogen. Das übertragene Bild dringt völlig in die Fasern der Unterlage ein.The surface of the paper according to the invention can be created with the aid of non-impact processes, such as laser printers Print and copy with any motif that can then be transferred to all synthetic or natural fabrics, but also to other flat objects. For this purpose, the paper provided with a motif is brought into contact with a flat base. The transfer takes place through heat (130 - 180 ° C) and pressure (34.5 x 10⁴N / m²), and only the backing paper is then removed from the base. The transferred image penetrates completely into the fibers of the base.

Im Vergleich zu den herkömmlichen oder im Stand der Technik beschriebenen Übertragungsverfahren können folgende Vorteile genannt werden:

  • höhere Farbbrillanz (bessere Farbwiedergabe);
  • gleichmäßiger störungsfreier Durchlauf während der Reproduktion auf das erfindungsgemäße Papier;
  • bessere Stapelfähigkeit;
  • Waschechtheit des übertragenen Bildes auf dem Textilgut;
  • vollständige Abtrennung der bedruckten Schicht ohne Rückstände auf dem abgezogenen Papier;
  • umweltfreundliche Bildübertragung, da nach Abzug nur noch das unbeschichtete Trägerpapier verbleibt.
The following advantages can be mentioned in comparison to the conventional transmission methods or those described in the prior art:
  • higher color brilliance (better color rendering);
  • uniform, trouble-free passage during reproduction on the paper according to the invention;
  • better stackability;
  • Fastness to washing of the transferred image on the textile;
  • complete separation of the printed layer without residues on the peeled paper;
  • environmentally friendly image transmission, since only the uncoated backing paper remains after deduction.

Die Erfindung soll mit Hilfe nachfolgender Beispiele näher beschrieben werden.The invention will be described in more detail with the aid of the following examples.

Beispiel 1example 1

Die Vorderseite eines neutralgeleimten Basispapieres mit einem Flächengewicht von 80 g/m² wurde nach Corona-Vorbehandlung mit den in der folgenden Tabelle angegebenen Copolymeren bzw. Copolymermischungen extrusionsbeschichtet und anschließend mit einer wäßrigen Dispersion eines carboxylierten Styrol/Butadien-Copolymers (4,5 Gew.% Feststoffgehalt) beschichtet und getrocknet (Auftragsgewicht 0,2 g/m²). Copolymer Zusammensetzung, Gew. % 1a 1b 1c 1d 1e 1f Ethylen/Vinylacetat mit 33 Mol. % Vinylacetat (ELVAX 150-W, Du Pont) 100 - - - - - Ethylen/Vinylacetat mit 28 Mol. % Vinylacetat (Evatane 28/40, Elf Atochem) - 100 - - - 25 Ethylen/Vinylacetat mit 14 Mol. % Vinylacetat (Escorene Ultra 00714, Exxon) - - 100 - - - Ethylen/n-Butylacrylat mit 35 Mol. % n-Butylacrylat (Enathene EA 80808, Quantum) - - - 100 - 75 Ethylen/Methylacrylat mit 15 Mol. % Methylacrylat (Lotryl 15 MA 03, Elf Atochem) - - - - 100 - Auftragsgewicht g/m² 15 25 35 20 20 20 The front of a neutral sized base paper with a basis weight of 80 g / m 2 was extrusion coated after corona pretreatment with the copolymers or copolymer mixtures given in the following table and then with an aqueous dispersion of a carboxylated styrene / butadiene copolymer (4.5% by weight Solids content) coated and dried (application weight 0.2 g / m²). Copolymer Composition,% by weight 1a 1b 1c 1d 1e 1f Ethylene / vinyl acetate with 33 mol% vinyl acetate (ELVAX 150-W, Du Pont) 100 - - - - - Ethylene / vinyl acetate with 28 mol% vinyl acetate (Evatane 28/40, Elf Atochem) - 100 - - - 25th Ethylene / vinyl acetate with 14 mol% vinyl acetate (Escorene Ultra 00714, Exxon) - - 100 - - - Ethylene / n-butyl acrylate with 35 mol% n-butyl acrylate (Enathene EA 80808, Quantum) - - - 100 - 75 Ethylene / methyl acrylate with 15 mol% methyl acrylate (Lotryl 15 MA 03, Elf Atochem) - - - - 100 - Application weight g / m² 15 25th 35 20th 20th 20th

Alle Beschichtungen wurden in einem Schmelztemperaturbereich von 180 - 250°C und 110 m/min Maschinengeschwindigkeit durchgeführt.All coatings were carried out in a melting temperature range of 180 - 250 ° C and 110 m / min machine speed.

Auf diese Weise beschichtete Papiere wurden in einem Kopierverfahren (Laserdrucker) mit Bildern versehen und anschließend mit einer Textilunterlage (Gewebe aus 100 % Baumwolle) in einer Presse in Kontakt gebracht, in der durch Wärme (180°C) und Druck (34,5 x 10⁴ N/m²) die Übertragung der Bilder auf die Textilunterlage erfolgte. Nach der Übertragung wurde der Papierträger abgezogen.Papers coated in this way were provided with images in a copying process (laser printer) and then brought into contact with a textile base (fabric made of 100% cotton) in a press in which heat (180 ° C.) and pressure (34.5 × 10⁴ N / m²) the images were transferred to the textile base. After the transfer, the paper base was peeled off.

Die bedruckte Textilunterlage wurde bei 30°C mit herkömmlichen Waschmitteln gewaschen und danach begutachtet.The printed textile underlay was washed at 30 ° C with conventional detergents and then examined.

Beispiel 2Example 2

Das mit Ethylen/Vinylacetat-Copolymer (28 Mol.% Vinylacetat) beschichtete Papier wurde mit folgenden wäßrigen Dispersionen beschichtet: Bestandteile Zusammensetzung, Gew. % 2a 2b 2c 2d Acrylsäureester/Vinylacetat/Vinylchlorid-Copolymer 50 %ige Disp. (Acronal 300 D, BASF) 10 - 10 - Carboxylierter Acrylsäureester 32 %ige Disp. (Carboset XPD 1242, Goodrich) - 15 - - Carboxyl. Styrol/Butadien-Latex, 50 %ige Disp. (Dow Latex 945, Dow Chem.) - - - 10 pyrogene Kieselsäure 10 %ig im Wasser (Cab-o-sil M5, Cabot GmbH) - - - 30 Al-dotierte feindisperse Kieselsäure, 30 %ig im Wasser (Ludox AM, Du Pont) - - 10 - Wasser 90 85 80 60 Auftragsgewicht g/m² 0,15 0,15 0,25 0,3 The paper coated with ethylene / vinyl acetate copolymer (28 mol% vinyl acetate) was coated with the following aqueous dispersions: Components Composition,% by weight 2a 2 B 2c 2d Acrylic acid ester / vinyl acetate / vinyl chloride copolymer 50% disp. (Acronal 300 D, BASF) 10th - 10th - Carboxylated acrylic acid ester 32% disp. (Carboset XPD 1242, Goodrich) - 15 - - Carboxyl. Styrene / butadiene latex, 50% disp. (Dow Latex 945, Dow Chem.) - - - 10th 10% pyrogenic silica in water (Cab-o-sil M5, Cabot GmbH) - - - 30th Al-doped finely dispersed silica, 30% in water (Ludox AM, Du Pont) - - 10th - water 90 85 80 60 Application weight g / m² 0.15 0.15 0.25 0.3

Die Beschichtungsmassen wurden mit einem Schöpfwalzensystem auf die zu beschichtende Oberfläche aufgetragen, mit einer Glattrakel dosiert und im Heißluftkanal bei Lufttemperaturen von ca. 80°C getrocknet. Die Maschinengeschwindigkeit betrug 100 m/min.The coating compositions were applied to the surface to be coated using a scoop roller system, metered with a smooth doctor blade and dried in a hot air duct at air temperatures of approximately 80.degree. The machine speed was 100 m / min.

Die auf diese Weise beschichteten Papiere wurden in einem Kopierverfahren bebildert und anschließend wie im Beispiel 1 mit einer Textilunterlage in Kontakt gebracht. Nach durchgeführter Bildübertragung wurde der Papierträger von der Textilunterlage abgezogen.The papers coated in this way were imaged in a copying process and then brought into contact with a textile base as in Example 1. After the image had been transferred, the paper backing was removed from the textile base.

Die bedruckte Textilunterlage wurde bei 30°C gewaschen und danach begutachtet.The printed textile underlay was washed at 30 ° C and then examined.

VergleichsbeispielComparative example

Ein nach EP 0 479 882 hergestelltes Übertragungspapier wurde wie im Beispiel 1 mit Bildern versehen und zur Bildübertragung auf eine Textilunterlage wie im Beispiel 1 eingesetzt.A transfer paper produced according to EP 0 479 882 was provided with images as in Example 1 and used for image transfer to a textile base as in Example 1.

PrüfergebnisseTest results

Die gemäß den Beispielen hergestellten Papiere wurden mit Hilfe eines Laserdruckers bebildert und anschließend mit einer Textilunterlage in Kontakt gebracht. Nach durchgeführter Bildübertragung wurde an der bedruckten Textilunterlage die Farbdensität gemessen.The papers produced according to the examples were imaged using a laser printer and then brought into contact with a textile base. After the image had been transferred, the color density was measured on the printed textile base.

Die Densitätsmessungen erfolgten vor und nach einem Waschvorgang mit herkömmlichen Waschmitteln bei 30°C. Das hierzu verwendete Gerät war ein Original Reflection Densitometer SOS-45. Die Messungen erfolgten für die Grundfarben Gelb, Cyan, Magenta und Schwarz.The density measurements were made before and after a washing process with conventional detergents at 30 ° C. The device used for this was an original reflection densitometer SOS-45. The measurements were carried out for the basic colors yellow, cyan, magenta and black.

Die in Tabelle 1 aufgeführten Ergebnisse zeigen, daß mit den erfindungsgemäß hergestellten Transferpapieren die Übertragung von Bildern mit höheren Werten der Farbdensität möglich ist. Insbesondere jedoch ist auf den geringeren Densitätsverlust nach einem Waschvorgang hinzuweisen.

Figure imgb0001
The results listed in Table 1 show that the transfer papers produced according to the invention make it possible to transfer images with higher values of color density. In particular, however, the lower loss of density after a washing process should be pointed out.
Figure imgb0001

Claims (10)

Papier für thermische Bildübertragung auf flächige poröse Oberflächen mit polymeren Schichten, gekennzeichnet durch einen Papierträger und eine darauf ausgebildete Schicht, die ein Ethylen-Copolymer oder ein Ethylen-Copolymergemisch und eine farbstoffaufnehmende Schicht enthält.Paper for thermal image transfer to flat porous surfaces with polymeric layers, characterized by a paper support and a layer formed thereon, which contains an ethylene copolymer or an ethylene copolymer mixture and a dye-receiving layer. Papier nach Anspruch 1, dadurch gekennzeichnet, daß das Copolymer 10 bis 35 Mol% eines weiteren Monomers enthält.Paper according to claim 1, characterized in that the copolymer contains 10 to 35 mol% of a further monomer. Papier nach Anspruch 1 und 2, dadurch gekennzeichnet, daß das Ethylen-Copolymer ein Ethylen/Vinylacetat-Copolymer ist.Paper according to claims 1 and 2, characterized in that the ethylene copolymer is an ethylene / vinyl acetate copolymer. Papier nach Anspruch 1 und 2, dadurch gekennzeichnet, daß das Ethylen-Copolymer ein Ethylen/(Meth)acrylsäurealkylester-Copolymer ist.Paper according to claims 1 and 2, characterized in that the ethylene copolymer is an ethylene / (meth) acrylic acid alkyl ester copolymer. Papier nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß die farbstoffaufnehmende Schicht ein Polymer mit niedriger Filmbildungstemperatur enthält.Paper according to Claims 1 to 4, characterized in that the dye-receiving layer contains a polymer with a low film-forming temperature. Papier nach Anspruch 5, dadurch gekennzeichnet, daß das Polymer ein Acrylsäureester-Copolymer, Styrol-Butadien- oder Acrylnitril-Butadien-Latex ist.Paper according to claim 5, characterized in that the polymer is an acrylic ester copolymer, styrene-butadiene or acrylonitrile-butadiene latex. Papier nach Anspruch 1 bis 6, dadurch gekennzeichnet, daß die farbstoffaufnehmende Schicht noch andere Zusatzstoffe wie Antihaftmittel enthält.Paper according to claims 1 to 6, characterized in that the dye-receiving layer also contains other additives such as non-stick agents. Papier nach Anspruch 7, dadurch gekennzeichnet, daß das Antihaftmittel eine Kieselsäure ist.Paper according to claim 7, characterized in that the non-stick agent is a silica. Papier nach Anspruch 8, dadurch gekennzeichnet, daß die Kieselsäure eine Aluminium-dotierte feindisperse Kieselsäure ist.Paper according to claim 8, characterized in that the silica is an aluminum-doped finely dispersed silica. Papier nach Anspruch 1 bis 9, dadurch gekennzeichnet, daß die farbstoffaufnehmende Schicht zusätzlich anorganische oder organische Pigmente enthält.Paper according to claims 1 to 9, characterized in that the dye-receiving layer additionally contains inorganic or organic pigments.
EP95106784A 1994-05-19 1995-05-05 Paper for thermal image transfer to flat porous surfaces Expired - Lifetime EP0683057B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4417520A DE4417520C1 (en) 1994-05-19 1994-05-19 Thermal transfer paper for printing textiles
DE4417520 1994-05-19
DE4436844 1994-10-14
DE4436844 1994-10-19

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EP0683057A1 true EP0683057A1 (en) 1995-11-22
EP0683057B1 EP0683057B1 (en) 1998-01-21

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997041489A1 (en) * 1996-04-26 1997-11-06 Oez Buelent Transfer paper for tranfer of xerocopies onto textiles
WO1998004418A1 (en) * 1996-07-25 1998-02-05 Minnesota Mining And Manufacturing Company Image receptor medium
WO1998004960A1 (en) * 1996-07-25 1998-02-05 Minnesota Mining And Maufacturing Company Method of providing images on an image receptor medium
WO1998034160A1 (en) * 1997-01-31 1998-08-06 Oez Buelent Method of transferring illustrations to substrates by means of xerography via transfer papers
WO2000001536A1 (en) * 1998-07-02 2000-01-13 Minnesota Mining And Manufacturing Company Image receptor medium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0228835A2 (en) * 1985-12-16 1987-07-15 Minnesota Mining And Manufacturing Company Receptor film for thermal mass transfer printing
EP0466503A1 (en) * 1990-07-13 1992-01-15 Denny Damodar Kalro Image transfer process and carrier material therefor
DE4210976A1 (en) * 1991-10-17 1993-04-22 Buelent Oez Transfer printing esp. for xerographic copy from original coated with polymer to paper or textile - where original consists of siliconised paper coated with EVA, or is coated with mixt. of EVA and paraffin wax
US5242739A (en) * 1991-10-25 1993-09-07 Kimberly-Clark Corporation Image-receptive heat transfer paper

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0228835A2 (en) * 1985-12-16 1987-07-15 Minnesota Mining And Manufacturing Company Receptor film for thermal mass transfer printing
EP0466503A1 (en) * 1990-07-13 1992-01-15 Denny Damodar Kalro Image transfer process and carrier material therefor
DE4210976A1 (en) * 1991-10-17 1993-04-22 Buelent Oez Transfer printing esp. for xerographic copy from original coated with polymer to paper or textile - where original consists of siliconised paper coated with EVA, or is coated with mixt. of EVA and paraffin wax
US5242739A (en) * 1991-10-25 1993-09-07 Kimberly-Clark Corporation Image-receptive heat transfer paper

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997041489A1 (en) * 1996-04-26 1997-11-06 Oez Buelent Transfer paper for tranfer of xerocopies onto textiles
WO1998004418A1 (en) * 1996-07-25 1998-02-05 Minnesota Mining And Manufacturing Company Image receptor medium
WO1998004960A1 (en) * 1996-07-25 1998-02-05 Minnesota Mining And Maufacturing Company Method of providing images on an image receptor medium
US5721086A (en) * 1996-07-25 1998-02-24 Minnesota Mining And Manufacturing Company Image receptor medium
WO1998034160A1 (en) * 1997-01-31 1998-08-06 Oez Buelent Method of transferring illustrations to substrates by means of xerography via transfer papers
WO2000001536A1 (en) * 1998-07-02 2000-01-13 Minnesota Mining And Manufacturing Company Image receptor medium
US6200647B1 (en) 1998-07-02 2001-03-13 3M Innovative Properties Company Image receptor medium

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EP0683057B1 (en) 1998-01-21
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DE59501310D1 (en) 1998-02-26
ES2111986T3 (en) 1998-03-16
ATE162471T1 (en) 1998-02-15

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