WO1998034160A1 - Method of transferring illustrations to substrates by means of xerography via transfer papers - Google Patents

Method of transferring illustrations to substrates by means of xerography via transfer papers Download PDF

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Publication number
WO1998034160A1
WO1998034160A1 PCT/EP1998/000062 EP9800062W WO9834160A1 WO 1998034160 A1 WO1998034160 A1 WO 1998034160A1 EP 9800062 W EP9800062 W EP 9800062W WO 9834160 A1 WO9834160 A1 WO 9834160A1
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WO
WIPO (PCT)
Prior art keywords
paper
ethylene
polymer
substrates
sealing
Prior art date
Application number
PCT/EP1998/000062
Other languages
German (de)
French (fr)
Inventor
Bülent Öz
Original Assignee
Oez Buelent
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oez Buelent filed Critical Oez Buelent
Priority to EP98901344A priority Critical patent/EP0956519A1/en
Priority to AU57659/98A priority patent/AU5765998A/en
Publication of WO1998034160A1 publication Critical patent/WO1998034160A1/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
    • G03G7/0006—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
    • 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
    • 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
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06Q—DECORATING TEXTILES
    • D06Q1/00—Decorating textiles
    • 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
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/22—Polyalkenes, e.g. polystyrene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/10—Post-imaging transfer of imaged layer; transfer of the whole imaged layer
    • 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

Definitions

  • the present invention relates to a method for transferring images by means of xerocopy to substrates such as textile documents, in particular T-shirts, cups, magnetic foils, mirrors or other smooth surfaces made of metal, leather, ceramic, wood, plexiglass, cardboard or plastic by means of transfer papers.
  • the transfer paper is preferably provided with a plastic layer which adheres to the substrate when it is sealed and is detached from the transfer paper.
  • the paper must be easily detached from the plastic layer after sealing.
  • the coatings contain a wax.
  • this wax shows the serious disadvantage that it evaporates in the copier at the prevailing temperatures, sometimes up to 160 ° C., and lies on the surfaces of the device, which leads to the optics becoming dirty and the paper transport means (rollers) being reduced as a result Do not transport friction coefficients properly anymore, the copying machines are therefore very often and cumbersome to clean.
  • a method for this purpose is known, for example, from DE 39 20 864 A1, wherein a xerocopy is produced on a coated paper and this is ironed onto the fabric.
  • the coating consists of three layers, it consists of a polyethylene (copolymer) layer, onto which a hardness layer is applied by screen printing and then a stabilizer layer is applied by screen printing.
  • a polyethylene (copolymer) layer onto which a hardness layer is applied by screen printing and then a stabilizer layer is applied by screen printing.
  • a stabilizer layer is applied by screen printing.
  • the disadvantage of this procedure is the very complex coating by extrusion of the base layer and after curing by screen printing each of the two other essential layers.
  • Another disadvantage of such printed fabrics is that the prints fade after only a few washes. In addition, the print quality is not satisfactory.
  • DE 40 24 419 A1 describes a print carrier for the same purposes as described here. This consists of two polymer layers applied to a carrier paper, a first rubber layer as a melt coating and a second layer made of polyethylene or polyacrylate lying above it. Detaching the paper after applying pressure to the textile requires keeping the paper at the melting temperature of the rubber. Although wax is not used as a release agent here, since the rubber bonds very well to the paper, the removal process may need to be heated (see e.g. Claim 19) in order to maintain the high temperature of 150 to 220 ° C required for this.
  • DE 26 14 078 C2 discloses a hot printing film consisting of a carrier and an EVA copolymer coating in a mixture with a tackifier and wax in a single-layer coating on a carrier together with pigment. This material does not serve the purpose of xerocopying prints and would have the disadvantages outlined above because of the evaporation of wax.
  • DE 39 42 021 A1 uses a single-layer coating for the same purposes.
  • paraffin is added to the plastic layer and, if necessary, additionally paper coated with silicone is used, which has exactly the above disadvantages.
  • DE 39 01 340 C2 describes heat-sensitive image transfer and recording materials for use in computer printers.
  • a heat-meltable layer of paint is melted over a thermal head, transferred to a paper and assembled there into an image.
  • the coating is on an ink ribbon and, in order to improve the image quality, should have a rubber as a release layer which should be free from paraffin and, above it, a heat-melting ink layer composed of colorant and resin component.
  • an applied image is not taken over by a carrier over the entire surface, but rather is put together on the paper after individual points have been removed from the ribbon.
  • the object of the present invention is therefore to create a method and a transfer paper which contain images on print originals.
  • Xerocopy can be transferred to substrates such as textile underlays, in particular T-shirts, cups, magnetic foils, mirrors or other smooth surfaces made of metal, leather, ceramic, wood, plexiglass, cardboard or plastic by means of transfer papers, both in terms of quality and washability
  • substrates such as textile underlays, in particular T-shirts, cups, magnetic foils, mirrors or other smooth surfaces made of metal, leather, ceramic, wood, plexiglass, cardboard or plastic
  • transfer papers both in terms of quality and washability
  • the transferred images meet high demands, but at the same time do not cause the previously unavoidable contamination of the copier.
  • Either only the toner from the xerography or also part or all of the plastic coating of the transfer paper should be able to be transferred.
  • the transfer papers according to the invention consist of machine-smooth papers suitable for xerocopiers with basis weights of z. B. 80-150, preferably 90-100 g / m 2 , which are coated on one side with polyolefins or polyolefin copolymers with a layer thickness of 20-50 g / m 2 , preferably 25-40 g / m 2 .
  • the polyolefins used are, for example, LDPE, EVA with 7-28%, preferably 7-15% VA, ethylene-acrylic acid copolymers or ethylene-methyl acrylate copolymers with 5-12% acrylic acid, ethylene-butyl-acrylate copolymers with 5-20% acrylate, which have a melt index according to ASTM-D-1238 (MFI) of 3.5-22, preferably 7-15 g / 10 min at 2.16 kg / 190 ° C.
  • MFI melt index according to ASTM-D-1238
  • the plastic coating should have a limited adhesion of ⁇ 2 N / 15 mm to the backing paper in the cold so that it can be separated therefrom after the sealing process, on the other hand it should have good adhesion (stickiness) at temperatures of> 80 ° C have a Vyer softening point according to ASTM D 15025 of 70 - 180 ° C so that they do not adhere to the contours of the substrate during sealing, have good adhesion to the toners at the usual xerography temperatures, without causing it to surface mixing comes.
  • high temperature cohesion should be lower than adhesion to the substrate and substrate.
  • the desired image can be applied to the transfer paper thus produced in all commercially available xerocopiers, the toners being commercially available from the corresponding color pigments in a plastic matrix, usually made of polyester with a melting range of e.g. B. 80 - 120 ° C, and auxiliaries exist.
  • This copy can now be pressed onto the substrate at temperatures of 80 - 200 ° C.
  • a cohesive break occurs in the polymer layer, so that parts of the polymer with the toner adhere to the substrate, and some adhere to the paper, so that a very thin flexible Plastic layer remains on the substrate.
  • This is particularly advantageous for textile surfaces that have high adhesiveness for washing resistance. If the detachment takes place at medium temperatures up to room temperature, remains on non-absorbent surfaces of the substrate, e.g. B. glass, ceramic, metal, plastic only the toner on the substrate back and paper and polymer coating are removed together.
  • the paper leads to the desired image properties mentioned above.
  • the paper has the advantage over the known transfer papers that it can be produced in only one coating process, since the separating layer and sealing layer are one.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Decoration By Transfer Pictures (AREA)

Abstract

The invention concerns a method of transferring illustrations to substrates by xerocopying via transfer papers which are coated with a polymer compound, by sealing onto the substrate. According to the invention, a transfer paper is used which comprises a machine-finished paper which is suitable for xerocopiers, has a basis weight of between 80 and 150 g/m2 and is coated with a polyolefin or polyolefin copolymer having a layer thickness of between 20 and 50 g/m2 and a melt index MFI of between 3 and 22 kg/10 min. at 2.16 kg/190 °C.

Description

Verfahren zum Übertragen von Abbildungen auf Substrate mittels Process for transferring images to substrates using
Xerographie über TransferpapiereXerography over transfer papers
Die vorliegende Erfindung betrifft ein Verfahren zum Übertragen von Abbildungen mittels Xerokopie auf Substrate wie textile Unterlagen, insbesondere T-Shirts, Tassen, Magnetfolien, Spiegel oder andere glatte Oberflächen aus Metall, Leder, Keramik, Holz, Plexiglas, Karton oder Kunststoff mittels Transferpapieren.The present invention relates to a method for transferring images by means of xerocopy to substrates such as textile documents, in particular T-shirts, cups, magnetic foils, mirrors or other smooth surfaces made of metal, leather, ceramic, wood, plexiglass, cardboard or plastic by means of transfer papers.
Das Problem bei der Übertragung von beliebigen Abbildungen durch Xerokopie über Transferpapiere, die nach Übertragen der Abbildung heiß auf Substrate aufgesiegelt werden, besteht in folgendem: Zum einen muß die Abbildung qualitativ hochwertig sein, d.h. sie darf nicht zu stark glänzen, die Farben müssen echt wirken und die Abbildung darf auch nach mehrmaligen Reinigungsvorgängen nicht ausbleichen oder abgewaschen werden.The problem with the transfer of arbitrary images by xerocopy over transfer papers, which are hot-sealed onto substrates after transfer of the image, is as follows: On the one hand, the image must be of high quality, i.e. it must not shine too much, the colors must look real and the image must not fade or be washed off even after repeated cleaning processes.
Um einen Schutz der Farben zu gewährleisten, wird vorzugsweise das Transferpapier mit einer Kunststoffschicht versehen, die beim Aufsiegeln am Substrat haften bleibt und von Transferpapier gelöst wird. Dazu muß sich aber das Papier nach dem Aufsiegeln leicht von der Kunststoffschicht lösen lassen. Um dies zu ermöglichen, enthalten die Beschichtungen ein Wachs. Dieses Wachs zeigt aber den gravierenden Nachteil, daß es im Kopiergerät bei den dort herrschenden, teilweise bis zu 160° hohen Temperaturen verdampft und sich auf die Oberflächen des Geräts legt, was dazu führt, daß die Optik verschmutzt und die Papiertransportmittel (Walzen) infolge herabgesetzter Reibungsbeiwerte nicht mehr einwandfrei transportieren, die Kopiergeräte somit sehr häufig und umständlich zu reinigen sind.In order to ensure protection of the colors, the transfer paper is preferably provided with a plastic layer which adheres to the substrate when it is sealed and is detached from the transfer paper. To do this, however, the paper must be easily detached from the plastic layer after sealing. To make this possible, the coatings contain a wax. However, this wax shows the serious disadvantage that it evaporates in the copier at the prevailing temperatures, sometimes up to 160 ° C., and lies on the surfaces of the device, which leads to the optics becoming dirty and the paper transport means (rollers) being reduced as a result Do not transport friction coefficients properly anymore, the copying machines are therefore very often and cumbersome to clean.
Bekannt ist z.B. aus der DE 39 20 864 A1 ein Verfahren zu diesem Zweck, wobei auf einem beschichteten Papier eine Xerokopie hergestellt und diese auf den Stoff aufgebügelt wird. Die Beschichtung ist dabei dreilagig, sie besteht aus einer Polyethylen(Copoly- mer)-Schicht, auf die im Siebdruck eine Härteschicht und danach wiederum im Siebdruck eine Stabilisatorschicht aufgetragen ist. Bei diesem Verfahren werden nur die xerographischen Farbstoffe in die Textilien übertragen und das Papierlaminat insgesamt abgezogen. Nachteilig ist an diesem Vorgehen einmal die sehr aufwendige Beschichtung durch Extrusion der Grundschicht und nach dem Aushärten durch Siebdruck jeweils der beiden unumgänglichen weiteren Lagen. Weiterhin ist an derart bedruckten Stoffen nachteilig, daß die Drucke schon nach wenigen Waschgängen verblassen. Darüber hinaus befriedigt die Druckqualität nicht.A method for this purpose is known, for example, from DE 39 20 864 A1, wherein a xerocopy is produced on a coated paper and this is ironed onto the fabric. The coating consists of three layers, it consists of a polyethylene (copolymer) layer, onto which a hardness layer is applied by screen printing and then a stabilizer layer is applied by screen printing. In this process, only the xerographic dyes are transferred into the textiles and the paper laminate is removed as a whole. The disadvantage of this procedure is the very complex coating by extrusion of the base layer and after curing by screen printing each of the two other essential layers. Another disadvantage of such printed fabrics is that the prints fade after only a few washes. In addition, the print quality is not satisfactory.
In der DE 40 24 419 A1 ist ein Druckträger für die gleichen Zwecke wie vorliegend beschrieben. Dieser besteht aus zwei auf einem Trägerpapier aufgebrachten polymeren Schichten, einer ersten Kautschukschicht als Schmelzbeschichtung und einer darüber liegenden zweiten aus Polyethylen oder Polyacrylat. Das Ablösen des Papiers nach dem Aufbringen des Druckes auf das Textil erfordert das Halten des Papiers auf Schmelztemperatur des Kautschuks. Hier wird zwar auch auf Wachs als Trennmittel verzichtet, da sich der Kautschuk aber sehr gut mit dem Papier verbindet, ist der Ablösevorgang gegebenenfalls auf Wärmezufuhr angewiesen (s. z.B. Anspruch 19), um die hierzu erforderliche hohe Temperatur von 150 bis 220 °C aufrechtzuerhalten.DE 40 24 419 A1 describes a print carrier for the same purposes as described here. This consists of two polymer layers applied to a carrier paper, a first rubber layer as a melt coating and a second layer made of polyethylene or polyacrylate lying above it. Detaching the paper after applying pressure to the textile requires keeping the paper at the melting temperature of the rubber. Although wax is not used as a release agent here, since the rubber bonds very well to the paper, the removal process may need to be heated (see e.g. Claim 19) in order to maintain the high temperature of 150 to 220 ° C required for this.
Das Ablösen könnte zwar durch Verwendung siliconisierten Papiers unterstützt werden, dies will man jedoch möglichst vermeiden, da die Siliconbeschichtung zu unerwünschtem unnatürlich wirkenden Glanz führt. In der DE 26 14 078 C2 ist eine Heißdruckfolie offenbart, bestehend aus einem Träger und einer EVA-Copolymerisatbeschichtung in einer Mischung mit einem Klebrigmacher und Wachs in einer einlagigen Beschichtung auf einem Träger zusammen mit Pigment. Dieses Material dient nicht dem Zweck des Übertragens von Drucken durch Xerokopie und hätte wegen des Verdampfens von Wachs die oben geschilderten Nachteile.Detachment could be supported by using siliconized paper, but this is to be avoided as far as possible, since the silicone coating leads to an undesirable, unnatural gloss. DE 26 14 078 C2 discloses a hot printing film consisting of a carrier and an EVA copolymer coating in a mixture with a tackifier and wax in a single-layer coating on a carrier together with pigment. This material does not serve the purpose of xerocopying prints and would have the disadvantages outlined above because of the evaporation of wax.
Weiterhin verwendet die DE 39 42 021 A1 für die gleichen Zwecke eine lediglich einlagige Beschichtung. Zur Verbesserung der Ablösbarkeit wird der Kunststoffschicht Paraffin zugesetzt und gegebenenfalls zusätzlich mit Silicon beschichtetes Papier verwendet, was genau die obigen Nachteile mit sich bringt.Furthermore, DE 39 42 021 A1 uses a single-layer coating for the same purposes. In order to improve the releasability, paraffin is added to the plastic layer and, if necessary, additionally paper coated with silicone is used, which has exactly the above disadvantages.
In der DE 39 01 340 C2 sind wärmeempfindliche Bildübertragungs- und Aufzeichnungsmaterialien zur Verwendung in Druckern von Computern beschrieben. Dabei wird eine wärmeschmelzbare Farbschicht über einen Thermokopf erschmolzen, auf ein Papier übertragen und dort zu einem Bild zusammengefügt. Die Beschichtung befindet sich auf einem Farbband und soll zwecks Verbesserung der Bildqualität einen Kautschuk als Freisetzungsschicht aufweisen, die frei sein soll von Paraffin und darüberliegend eine wärmeschmelzende Farbschicht aus Färbemittel und Harzkomponente. Dabei wird jedoch nicht ein aufgebrachtes Bild vollflächig von einem Träger übernommen, sondern dieses nach Entnahme von Einzelpunkten vom Farbband auf dem Papier zusammengesetzt.DE 39 01 340 C2 describes heat-sensitive image transfer and recording materials for use in computer printers. Here, a heat-meltable layer of paint is melted over a thermal head, transferred to a paper and assembled there into an image. The coating is on an ink ribbon and, in order to improve the image quality, should have a rubber as a release layer which should be free from paraffin and, above it, a heat-melting ink layer composed of colorant and resin component. However, an applied image is not taken over by a carrier over the entire surface, but rather is put together on the paper after individual points have been removed from the ribbon.
In der DE 33 11 728 A1 sind letztlich "Abziehbilder" beschrieben, die auf saugfähiges Papier aufgebracht sind und von diesem durch Wasser abgelöst werden können, um sie auf andere Unterlagen zu übertragen. Ein solches Material ist für die vorliegenden Zwecke ungeeignet.DE 33 11 728 A1 finally describes "decals" which are applied to absorbent paper and can be detached from it by water in order to transfer it to other documents. Such a material is unsuitable for the present purposes.
Die vorliegende Erfindung hat sich daher die Aufgabe gestellt, ein Verfahren und ein Transferpapier zu schaffen, welches auf Druckvorlagen befindliche Abbildun- gen durch Xerokopie auf Substrate wie textile Unterlagen, insbesondere T-Shirts, Tassen, Magnetfolien, Spiegel oder andere glatte Oberflächen aus Metall, Leder, Keramik, Holz, Plexiglas, Karton oder Kunststoff mittels Transferpapieren übertragen kann, das sowohl hinsichtlich der Qualität und der Waschbarkeit der übertragenen Bilder hohen Ansprüchen genügt, das aber gleichzeitig die bisher unvermeidbare Verschmutzung des Kopiergerätes nicht verursacht. Dabei sollen entweder nur die Toner aus der Xerographie oder auch ein Teil oder die ganze Kunststoffbeschichtung des Transferpapiers übertragen werden können.The object of the present invention is therefore to create a method and a transfer paper which contain images on print originals. Xerocopy can be transferred to substrates such as textile underlays, in particular T-shirts, cups, magnetic foils, mirrors or other smooth surfaces made of metal, leather, ceramic, wood, plexiglass, cardboard or plastic by means of transfer papers, both in terms of quality and washability The transferred images meet high demands, but at the same time do not cause the previously unavoidable contamination of the copier. Either only the toner from the xerography or also part or all of the plastic coating of the transfer paper should be able to be transferred.
Die Lösung dieser Aufgabe gelingt mit einem die Merkmale des Hauptanspruches aufweisenden Verfahrens bzw. mit dem darin beschriebenen Transferpapier. Vorteilhafte Ausgestaltungen finden sich jeweils in den Unteransprüchen.This problem is solved with a method having the features of the main claim or with the transfer paper described therein. Advantageous developments can be found in the subclaims.
Die erfindungsgemäßen Transferpapiere bestehen aus maschinenglatten, für Xerokopierer geeigneten Papieren mit Flächengewichten von z. B. 80 - 150, vorzugsweise 90 - 100 g/m2, welche einseitig mit Polyolefinen oder Polyolefin- copolymeren mit einer Schichtdicke von 20 - 50 g/m2, vorzugsweise 25 - 40 g/m2, beschichtet sind.The transfer papers according to the invention consist of machine-smooth papers suitable for xerocopiers with basis weights of z. B. 80-150, preferably 90-100 g / m 2 , which are coated on one side with polyolefins or polyolefin copolymers with a layer thickness of 20-50 g / m 2 , preferably 25-40 g / m 2 .
Als Polyolefine werden beispielsweise LDPE, EVA mit 7 - 28 %, vorzugsweise 7 - 15 % VA-Anteil, Ethylenacrylsäurecopolymere oder Ethylen-methylacrylat- copolymere mit 5 - 12 % Acrylsäure, Ethylenbutyl-acrylat-copolymere mit 5 - 20 % Acrylat verwendet, die einen Schmelzindex nach ASTM-D-1238 (MFI) von 3,5 - 22, vorzugsweise 7 - 15 g / 10 min bei 2,16 kg / 190 °C aufweisen. Die Kunststoffbeschichtung soll einerseits in der Kälte eine begrenzte Haftung von < 2 N / 15 mm an dem Trägerpapier aufweisen, so daß sie nach dem Siegelvorgang davon getrennt werden kann, andererseits eine gute Haftung (Klebrigkeit) bei Temperaturen von > 80 °C besitzen, um beim Siegeln nicht abgelöst zu werden, einen Vincat Erweichungspunkt nach ASTM D 15025 von 70 - 180 °C aufweisen, um sich beim Siegeln gut an die Konturen des Substrats anzulegen, bei den üblichen Xerographietemperaturen eine gute Adhäsion zu den Tonern aufweisen, ohne daß es zu einer Oberflächenvermischung kommt. Für gewisse Ausführungsformen sollte die Kohäsion bei hohen Temperaturen niedriger als die Adhäsion zum Trägermaterial und Substrat sein.The polyolefins used are, for example, LDPE, EVA with 7-28%, preferably 7-15% VA, ethylene-acrylic acid copolymers or ethylene-methyl acrylate copolymers with 5-12% acrylic acid, ethylene-butyl-acrylate copolymers with 5-20% acrylate, which have a melt index according to ASTM-D-1238 (MFI) of 3.5-22, preferably 7-15 g / 10 min at 2.16 kg / 190 ° C. On the one hand, the plastic coating should have a limited adhesion of <2 N / 15 mm to the backing paper in the cold so that it can be separated therefrom after the sealing process, on the other hand it should have good adhesion (stickiness) at temperatures of> 80 ° C have a Vincat softening point according to ASTM D 15025 of 70 - 180 ° C so that they do not adhere to the contours of the substrate during sealing, have good adhesion to the toners at the usual xerography temperatures, without causing it to surface mixing comes. For certain embodiments, high temperature cohesion should be lower than adhesion to the substrate and substrate.
Auf das so hergestellte Transferpapier kann in allen handelsüblichen Xerokopierern das gewünschte Bild aufgebracht werden, wobei die Toner handelsüblich aus den entsprechenden Farbpigmenten in einer Kunststoffmatrix, üblicherweise aus Polyester mit einem Schmelzbereich von z. B. 80 - 120 °C, und Hilfsstoffen bestehen.The desired image can be applied to the transfer paper thus produced in all commercially available xerocopiers, the toners being commercially available from the corresponding color pigments in a plastic matrix, usually made of polyester with a melting range of e.g. B. 80 - 120 ° C, and auxiliaries exist.
Diese Kopie kann nun bei Temperaturen von 80 - 200 °C auf das Substrat aufgepreßt werden. Durch Trennen von Substrat und Trägerpapier in der Wärme bei Temperaturen oberhalb des Erweichungsbereichs findet ein Kohäsions- bruch in der Polymerschicht statt, so daß Teile des Polymers mit dem Toner am Substrat haften bleiben, und ein Teil am Papier haftet, so daß eine sehr dünne flexible Kunststoffschicht auf dem Substrat verbleibt. Dies ist besonders bei Textiloberflächen, die eine hohe Haftfähigkeit aufweisen, für die Waschbeständigkeit vorteilhaft. Wenn die Ablösung bei mittleren Temperaturen bis zur Raumtemperatur erfolgt, bleibt bei nicht saugfähigen Oberflächen des Substrats, z. B. Glas, Keramik, Metall, Kunststoff ausschließlich der Toner auf dem Substrat zurück und Papier und Polymerbeschichtung werden zusammen abgezogen. Bei saugfähigen Materialien, insbesondere bei Textilien, bleibt das Polymer am Substrat haften, da oberhalb des Vincat Erweichungspunktes eine feste Verbindung entsteht. Bei saugfähigen Substraten kann bei Temperaturen von 80 - 100 °C, d. h. unter der Erweichung des Polymers gesiegelt und nach Abkühlen das Transferpapier mit dem Polymer rückstandsfrei abgezogen werden. Bei Textilien sind solche Beschichtungen zwar hintergrundsfrei und flexibel, aber nicht gut waschbeständig, so daß eine zusätzliche Fixierung erforderlich ist. Für Textilien wird daher die vorstehende Verfahrensweise bevorzugt.This copy can now be pressed onto the substrate at temperatures of 80 - 200 ° C. By separating the substrate and carrier paper in the heat at temperatures above the softening range, a cohesive break occurs in the polymer layer, so that parts of the polymer with the toner adhere to the substrate, and some adhere to the paper, so that a very thin flexible Plastic layer remains on the substrate. This is particularly advantageous for textile surfaces that have high adhesiveness for washing resistance. If the detachment takes place at medium temperatures up to room temperature, remains on non-absorbent surfaces of the substrate, e.g. B. glass, ceramic, metal, plastic only the toner on the substrate back and paper and polymer coating are removed together. This remains with absorbent materials, especially textiles The polymer adheres to the substrate because a firm connection is formed above the vincat softening point. In the case of absorbent substrates, it can be sealed at temperatures of 80 - 100 ° C, ie with the softening of the polymer, and after cooling the transfer paper with the polymer can be removed without leaving any residue. In the case of textiles, such coatings are indeed background-free and flexible, but are not very wash-resistant, so that additional fixation is required. The above procedure is therefore preferred for textiles.
Ein derartiges Transferpapier führt zu den oben genannten gewünschten Bildeigenschaften. Das Papier hat gegenüber den bekannten Transferpapieren den Vorteil, daß es in nur einem Beschichtungsvorgang hergestellt werden kann, da Trennschicht und Siegelschicht eins sind. Such transfer paper leads to the desired image properties mentioned above. The paper has the advantage over the known transfer papers that it can be produced in only one coating process, since the separating layer and sealing layer are one.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Verfahren zum Übertragen von Abbildungen auf Substrate durch Xerokopie über Transferpapiere, die mit einer polymeren Verbindung beschichtet sind durch Aufsiegeln auf das Substrat, dadurch gekennzeichnet, daß man ein Transferpapier einsetzt, das aus einem maschinenglatten, für Xerokopierer geeigneten Papier mit einem Flächengewicht von 80 -1. A method for transferring images on substrates by xerocopying over transfer papers which are coated with a polymeric compound by sealing onto the substrate, characterized in that a transfer paper is used which consists of a machine-smooth paper suitable for xerocopiers with a basis weight of 80 -
150 g/m2 besteht, welches mit einem Polyolefin oder Polyolefincopolymerisat in einer Schichtdicke von 20 - 50 g/m2 und einem Schmelzindex MFI von 3 - 22 kg / 10 min bei 2,16 kg/190 °C beschichtet ist.150 g / m 2 , which is coated with a polyolefin or polyolefin copolymer in a layer thickness of 20-50 g / m 2 and a melt index MFI of 3-22 kg / 10 min at 2.16 kg / 190 ° C.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß die Polymerschicht aus LDPE, EVA, Ethylenacrylsäurecopolymere oder Ethylen- methylacrylat-copolymere , Ethylenbutyl-acrylat-copolymere besteht.2. The method according to claim 1, characterized in that the polymer layer consists of LDPE, EVA, ethylene acrylic acid copolymers or ethylene-methyl acrylate copolymers, ethylene-butyl acrylate copolymers.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Ethylenvinylacetat 7 - 28, vorzugsweise 7 - 18 Gew.-% Vinyiacetatgruppen enthält.3. The method according to claim 1 or 2, characterized in that the ethylene vinyl acetate contains 7-28, preferably 7-18 wt .-% vinyl acetate groups.
4. Verfahren nach mindestens einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Papier ein Flächengewicht von 90 - 100 g/m2 und das Polymer ein Flächengewicht von 25 -40 g/m2 aufweist.4. The method according to at least one of claims 1 to 3, characterized in that the paper has a weight per unit area of 90-100 g / m 2 and the polymer has a weight per unit area of 25-40 g / m 2 .
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Aufsiegeln bei einer Temperatur von 80 - 200 °C erfolgt und das Trägerpapier bei einer Temperatur oberhalb des Vincat Erweichungsbereichs des Polymeren unter Kohäsionsbruch abgezogen wird.5. The method according to any one of claims 1 to 4, characterized in that the sealing is carried out at a temperature of 80 - 200 ° C and the backing paper is removed at a temperature above the Vincat softening range of the polymer with cohesive failure.
6. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Siegeln bei Temperaturen von 80 - 200 °C erfolgt und das Trägerpapier bei mittleren Temperaturen bis zur Raumtemperatur abgezogen wird, wobei bei nicht saugfähigen Substraten das Polymer rückstandsfrei vom Substrat abgetrennt und bei rauhen Substraten vom Papier getrennt wird. 6. The method according to any one of claims 1 to 4, characterized in that the sealing is carried out at temperatures of 80 - 200 ° C and the backing paper is removed at medium temperatures to room temperature, the polymer being separated from the substrate without residues in the case of non-absorbent substrates and is separated from paper for rough substrates.
7. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Siegelung bei Temperaturen von 80 - 100 °C erfolgt und das Papier mit dem Polymer bei Raumtemperatur auch von saugfähigen Substraten abgezogen wird.7. The method according to any one of claims 1 to 4, characterized in that the sealing takes place at temperatures of 80 - 100 ° C and the paper with the polymer is also drawn off from absorbent substrates at room temperature.
8. Transferpapier zum Übertragen von Abbildungen auf Substrate zur Durchführung des Verfahrens nach Anspruch 1 , dadurch gekennzeichnet, daß es aus einem maschinenglatten, für Xerokopierer geeigneten Papier mit einem Flächengewicht von 80 - 150 g/m2 besteht, welches mit einem Polyolefin oder Polyolefincopolymerisat in einer Schichtdicke von 20 - 50 g/m2 und einem Schmelzindex MFI von 3 - 22 kg / 10 min bei 2,16 kg/ 190 °C beschichtet ist.8. transfer paper for transferring images to substrates for performing the method according to claim 1, characterized in that it consists of a machine-smooth, suitable for xerocopiers paper with a basis weight of 80 - 150 g / m 2 , which with a polyolefin or polyolefin copolymer in a layer thickness of 20-50 g / m 2 and a melt index MFI of 3-22 kg / 10 min at 2.16 kg / 190 ° C.
9. Papier nach Anspruch 8, dadurch gekennzeichnet, daß die Polymerschicht aus LDPE, EVA, Ethylenacrylsäurecopolymere oder Ethylen- methylacrylat-copolymere, Ethylenbutyl-acrylat-copolymere besteht.9. Paper according to claim 8, characterized in that the polymer layer consists of LDPE, EVA, ethylene acrylic acid copolymers or ethylene-methyl acrylate copolymers, ethylene-butyl acrylate copolymers.
10. Papier nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß das Ethy- lenvinylacetat 7 - 28, vorzugsweise 7 - 18 Gew.-% Vinylacetatgruppen enthält.10. Paper according to claim 8 or 9, characterized in that the ethylene vinyl acetate contains 7-28, preferably 7-18% by weight of vinyl acetate groups.
11. Papier nach mindestens einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, daß das Papier ein Flächengewicht von 90 - 100 g/m2 und das Polymer ein Flächengewicht von 25 -40 g/m2 aufweist 11. Paper according to at least one of claims 8 to 10, characterized in that the paper has a weight per unit area of 90-100 g / m 2 and the polymer has a weight per unit area of 25-40 g / m 2
PCT/EP1998/000062 1997-01-31 1998-01-08 Method of transferring illustrations to substrates by means of xerography via transfer papers WO1998034160A1 (en)

Priority Applications (2)

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EP98901344A EP0956519A1 (en) 1997-01-31 1998-01-08 Method of transferring illustrations to substrates by means of xerography via transfer papers
AU57659/98A AU5765998A (en) 1997-01-31 1998-01-08 Method of transferring illustrations to substrates by means of xerography via transfer papers

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DE1997103731 DE19703731A1 (en) 1997-01-31 1997-01-31 Process for transferring images to substrates by means of xerography over transfer papers
DE19703731.3 1997-01-31

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2310393A1 (en) * 1972-03-03 1973-09-13 Canon Kk TRANSFER PAPER FOR ELECTROPHOTOGRAPHY
WO1991000385A1 (en) * 1989-06-26 1991-01-10 Hagedorn Juergen Process for transferring designs to a backing
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
EP0683057A1 (en) * 1994-05-19 1995-11-22 FELIX SCHOELLER JR. FOTO- UND SPEZIALPAPIERE GmbH &amp; Co. KG. Paper for thermal image transfer to flat porous surfaces

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2310393A1 (en) * 1972-03-03 1973-09-13 Canon Kk TRANSFER PAPER FOR ELECTROPHOTOGRAPHY
WO1991000385A1 (en) * 1989-06-26 1991-01-10 Hagedorn Juergen Process for transferring designs to a backing
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
EP0683057A1 (en) * 1994-05-19 1995-11-22 FELIX SCHOELLER JR. FOTO- UND SPEZIALPAPIERE GmbH &amp; Co. KG. Paper for thermal image transfer to flat porous surfaces

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
L.R.SAGNERI: "Non-contaminating heat seal formulation", XEROX DISCLOSURE JOURNAL, vol. 5, no. 3, 1 May 1980 (1980-05-01) - 30 June 1980 (1980-06-30), STAMFORD USA, pages 229, XP002061718 *

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