EP0425870A2 - Process for the fabrication of a coated web - Google Patents

Process for the fabrication of a coated web Download PDF

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Publication number
EP0425870A2
EP0425870A2 EP90119645A EP90119645A EP0425870A2 EP 0425870 A2 EP0425870 A2 EP 0425870A2 EP 90119645 A EP90119645 A EP 90119645A EP 90119645 A EP90119645 A EP 90119645A EP 0425870 A2 EP0425870 A2 EP 0425870A2
Authority
EP
European Patent Office
Prior art keywords
printing
web
layer
still wet
ink
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.)
Withdrawn
Application number
EP90119645A
Other languages
German (de)
French (fr)
Other versions
EP0425870A3 (en
Inventor
Willi Kandler
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.)
4P Nicolaus Kempten GmbH
Original Assignee
4P Nicolaus Kempten GmbH
Unilever PLC
Unilever NV
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 4P Nicolaus Kempten GmbH, Unilever PLC, Unilever NV filed Critical 4P Nicolaus Kempten GmbH
Publication of EP0425870A2 publication Critical patent/EP0425870A2/en
Publication of EP0425870A3 publication Critical patent/EP0425870A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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

Definitions

  • the invention relates to a method for producing a printed and coated web of paper, cardboard or the like, which or the like after printing with a plastic. is coated.
  • Such webs were previously either provided with a plastic layer and then printed after cooling, with the applied printing ink having to be allowed sufficient time to dry.
  • UV drying e.g. For materials intended for food packaging, UV drying or electron beam drying is only possible with a precise knowledge of the substances that form. Corresponding protective devices for the operating personnel must also be provided. In addition, the plastics treated with UV or ESH rays can no longer be reused and are also critical in terms of disposal.
  • the invention has for its object to propose an economical method with which an efficient production without damaging the web is possible.
  • This object is achieved in that the plastic layer or the like immediately after printing on the web carried out in a rotary printing device. is extruded onto the still wet ink.
  • a polyethylene layer preferably an LDPE layer, is extruded onto the still wet printing ink.
  • a layer of wax, a two-component lacquer or the like follows the printing on the still wet printing ink. is applied.
  • Another embodiment of the invention is that an offset method is provided as the printing method.
  • a very advantageous development of the method according to the invention is also that the plastic layer or the like. is applied to the still wet ink using the inline process.
  • the solution according to the invention brings about great advantages.
  • a cardboard web for example, coming from a roll-off device, is introduced into a web offset printing device, in which it is printed in succession with several colors.
  • the web which is still wet, reaches an extrusion device in which a plastic film is extruded onto the printed web side.
  • the web can then run through a further extrusion device in which a plastic layer is also extruded onto the back of the web.
  • a wax layer can also be applied on one or both sides. Both the wax layer and the plastic layer dry by cooling, whereby cooling cylinders and the ambient air are already sufficient for cooling.
  • it is also possible to use a 2-component paint for the coating which dries without any external influence.

Landscapes

  • Printing Methods (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

A process for the fabrication of a printed and coated web of paper, cardboard or the like, wherein a layer of plastic or the like is extruded onto the still wet printing ink immediately after the printing of the web undertaken in a rotary printing machine.

Description

Die Erfindung bezieht sich auf ein Verfahren zum Herstellen einer bedruckten und beschichteten Bahn aus Papier, Karton od.dgl., die anschließend an das Bedrucken mit einem Kunststoff od.dgl. beschichtet wird.The invention relates to a method for producing a printed and coated web of paper, cardboard or the like, which or the like after printing with a plastic. is coated.

Derartige Bahnen wurden bisher entweder zuerst mit einer Kunststoffschicht versehen und anschließend nach dem Abkühlen bedruckt, wobei der aufgebrachten Druckfarbe genügend Zeit zum Abtrocknen gelassen werden mußte.Such webs were previously either provided with a plastic layer and then printed after cooling, with the applied printing ink having to be allowed sufficient time to dry.

Es ist zwar auch möglich, eine zusätzliche Trocknung durch Bestrahlung beispielsweise mit UV, Elektronenstrahlen (ESH) oder IR in Kombination mit Anblasen mit Heißluft vorzusehen. Dabei wird zwar die Farbe wirksam getrocknet, gleichzeitig aber die aus Kartonfasern bestehende Bahn geschädigt. Bei einer Trockung mit IR-Bestrahlung tritt dabei noch die geringste Schädigung ein, dafür ist aber ein sehr hoher Energieaufwand notwendig.It is also possible to provide additional drying by irradiation, for example with UV, electron beams (ESH) or IR, in combination with blowing with hot air. The paint is effectively dried, but at the same time the web made of cardboard fibers is damaged. The slightest damage occurs when drying with IR radiation, but this requires a very high amount of energy.

Die Trocknung mit Heißluft bringt eine sehr hohe thermische Belastung der Bahn mitsich; darüber hinaus muß die Abluft wieder gereinigt werden, was ebenfalls einen sehr großen Aufwand darstellt.Drying with hot air brings with it a very high thermal load on the web; In addition, the exhaust air must be cleaned again, which is also a very large effort.

Eine Strahlentrocknung, z.B. UV-Trocknung oder Elektronenstrahltrocknung ist bei für Lebensmittel-­Verpackungen vorgesehenen Materialien nur bei genauer Kenntnis der sich dabei bildenden Stoffe möglich. Darüber hinaus sind entsprechende Schutzeinrichtungen für das Bedienungspersonal vorzusehen. Außerdem können die mit UV- oder ESH-Strahlen behandelten Kunststoffe nicht mehr wiederverwendet werden und sind auch bei der Entsorgung kritisch.Radiation drying, e.g. For materials intended for food packaging, UV drying or electron beam drying is only possible with a precise knowledge of the substances that form. Corresponding protective devices for the operating personnel must also be provided. In addition, the plastics treated with UV or ESH rays can no longer be reused and are also critical in terms of disposal.

Aus der DE-A-37 02 218 ist ein Trockenverfahren für Rollenoffsetdruck bekannt, bei dem nach dem letzten Druckaggregat eine wässrige Lösung aus 65 Teilen Wasser und 35 Teilen feiner Kunstharzteilchen aufgetragen wird. Anschließend erfolgt eine Trocknung durch Luftzufuhr mit auf 40 bis 60°C erwärmter Luft.From DE-A-37 02 218 a drying process for web offset printing is known, in which an aqueous solution of 65 parts of water and 35 parts of fine synthetic resin particles is applied after the last printing unit. This is followed by drying by supplying air with air heated to 40 to 60 ° C.

Bei diesem Verfahren wird der frisch bedruckten Bahn zusätzliches Wasser zugeführt, was sowohl dem Druckbild als auch der Papier od. Kartonbahn nicht zuträglich ist. Darüber hinaus muß das Wasser in einem langwierigen Trocknungsverfahren wieder entfernt werden.In this process, additional water is added to the freshly printed web, which is not beneficial to both the printed image and the paper or cardboard web. In addition, the water has to be removed again in a lengthy drying process.

Der Erfindung liegt die Aufgabe zugrunde, ein wirtschaftliches Verfahren vorzuschlagen, mit dem ein rationelles Herstellen ohne Schädigung der Bahn möglich ist.The invention has for its object to propose an economical method with which an efficient production without damaging the web is possible.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß unmittelbar anschließend an das in einer Rotationsdruckeinrichtung vorgenommene Bedrucken der Bahn die Kunststoffschicht od.dgl. auf die noch nasse Druckfarbe aufextrudiert wird.This object is achieved in that the plastic layer or the like immediately after printing on the web carried out in a rotary printing device. is extruded onto the still wet ink.

Es erschien bisher unmöglich, auf die noch feuchte Druckfarbe eine derartige Schicht aufzubringen; überraschender Weise ergab sich jedoch, daß die aufgebrachte Schicht auf der Farbe eine wenigstens gleich große Haltekraft entwickelt wie auf den benachbarten Bahnabschnitten ohne Druckfarbe.It previously seemed impossible to apply such a layer to the still damp printing ink; Surprisingly, however, it was found that the applied layer on the ink develops at least the same holding force as on the adjacent web sections without printing ink.

Damit muß nicht nur vor dem Beschichten keine Wartezeit eingeschaltet werden, sondern eine Trocknungszeit der Druckfarbe entfällt völlig. Die nachfolgenden Arbeitgänge können ohne verfahrensbedingte Zwischenlagerung sofort erfolgen.This means that not only does a waiting time have to be switched on before coating, but there is also no drying time for the printing ink. The subsequent operations can take place immediately without process-related intermediate storage.

Als sehr vorteilhaft hat sich auch ergeben, wenn erfindungsgemäß eine Polyäthylenschicht, vorzugsweise LDPE-­Schicht, auf die noch nasse Druckfarbe aufextrudiert wird.It has also been found to be very advantageous if, according to the invention, a polyethylene layer, preferably an LDPE layer, is extruded onto the still wet printing ink.

Sehr vorteilhaft ist es auch, wenn erfindungsgemäß anschließend an das Bedrucken auf die noch nasse Druckfarbe eine Wachsschicht, ein 2-Komponentenlack od.dgl. aufgebracht wird.It is also very advantageous if, according to the invention, a layer of wax, a two-component lacquer or the like follows the printing on the still wet printing ink. is applied.

Eine weitere erfindungsgemäße Ausgestaltung liegt darin, daß als Druckverfahren ein Offsetverfahren vorgesehen ist.Another embodiment of the invention is that an offset method is provided as the printing method.

Eine sehr vorteilhafte Weiterbildung des erfindungsgemäßen Verfahrens liegt auch darin, daß die Kunststoffschicht od.dgl. im Inline-Verfahren auf die noch nasse Druckfarbe aufgebracht wird.A very advantageous development of the method according to the invention is also that the plastic layer or the like. is applied to the still wet ink using the inline process.

Gerade in Verbindung mit einem Offsetverfahren und dem Inline-Verfahren werden mit der erfindungsgemäßen Lösung sehr große Vorteile bewirkt.Especially in connection with an offset method and the inline method, the solution according to the invention brings about great advantages.

Die Erfindung wird nachstehend an einem Beispiel beschrieben.The invention is described below using an example.

Eine Kartonbahn wird beispielsweise von einer Abrolleinrichtung kommend, in eine Rollenoffset-­Druckeinrichtung eingeführt, in welcher sie nacheinander mit mehreren Farben bedruckt wird. Unmittelbar nach dem letzten Farbwerk gelangt die noch feuchte Bahn in eine Extrudiereinrichtung, in welcher auf die bedruckte Bahnseite ein Kunststoff-Film aufextrudiert wird. Im Anschluß daran kann die Bahn durch eine weitere Extrudiereinrichtung laufen, in welcher auch auf die Rückseite der Bahn eine Kunststoffschicht aufextrudiert wird. Anstelle des Kunststoffes kann auch ein oder beidseitig eine Wachsschicht aufgebracht werden. Sowohl die Wachsschicht als auch die Kunststoffschicht trocknen durch Kühlung, wobei Kühlzylinder und die Umgebungsluft bereits zur Kühlung ausreichen. Es ist aber auch möglich, zur Beschichtung einen 2-­Komponentenlack zu verwenden, der ohne jede äußere Einwirkung trocknet.A cardboard web, for example, coming from a roll-off device, is introduced into a web offset printing device, in which it is printed in succession with several colors. Immediately after In the last inking unit, the web, which is still wet, reaches an extrusion device in which a plastic film is extruded onto the printed web side. The web can then run through a further extrusion device in which a plastic layer is also extruded onto the back of the web. Instead of the plastic, a wax layer can also be applied on one or both sides. Both the wax layer and the plastic layer dry by cooling, whereby cooling cylinders and the ambient air are already sufficient for cooling. However, it is also possible to use a 2-component paint for the coating, which dries without any external influence.

Claims (5)

1. Verfahren zum Herstellen einer bedruckten und beschichteten Bahn aus Papier, Karton od.dgl., die anschließend an das Bedrucken mit einem Kunststoff od.dgl. beschichtet wird, dadurch gekennzeichnet, daß unmittelbar anschließend an das in einer Rotationsdruckeinrichtung vorgenommene Bedrucken der Bahn die Kunststoffschicht od.dgl. auf die noch nasse Druckfarbe aufextrudiert wird.1. A method for producing a printed and coated web of paper, cardboard or the like, which or the like after printing with a plastic. is coated, characterized in that immediately after the printing of the web carried out in a rotary printing device, the plastic layer or the like. is extruded onto the still wet ink. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß eine Polyäthylenschicht, vorzugsweise LDPE-Schicht, auf die noch nasse Druckfarbe aufextrudiert wird.2. The method according to claim 1, characterized in that a polyethylene layer, preferably LDPE layer, is extruded onto the still wet printing ink. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß anschließend an das Bedrucken auf die noch nasse Druckfarbe eine Wachsschicht, ein 2-Komponentenlack od.dgl. aufgebracht wird.3. The method according to claim 1, characterized in that subsequent to the printing on the still wet printing ink, a wax layer, a two-component varnish or the like. is applied. 4. Verfahren nach Anspruch 1, 2 od. 3, dadurch gekennzeichnet, daß als Druckverfahren ein Offsetverfahren vorgesehen ist.4. The method according to claim 1, 2 or 3, characterized in that an offset method is provided as the printing method. 5. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Kunststoffschicht od.dgl. im Inline-Verfahren auf die noch nasse Druckfarbe aufgebracht wird.5. The method according to any one of the preceding claims, characterized in that the plastic layer or the like. is applied to the still wet ink using the inline process.
EP19900119645 1989-10-28 1990-10-13 Process for the fabrication of a coated web Withdrawn EP0425870A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893936043 DE3936043A1 (en) 1989-10-28 1989-10-28 METHOD FOR PRODUCING A COATED TRAIN
DE3936043 1989-10-28

Publications (2)

Publication Number Publication Date
EP0425870A2 true EP0425870A2 (en) 1991-05-08
EP0425870A3 EP0425870A3 (en) 1993-03-10

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EP19900119645 Withdrawn EP0425870A3 (en) 1989-10-28 1990-10-13 Process for the fabrication of a coated web

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DE (1) DE3936043A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10252553B4 (en) * 2002-11-08 2006-10-19 Sig Combibloc Systems Gmbh Plastic-coated composite material for heat-sealable packages and method for its production

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4595611A (en) * 1985-06-26 1986-06-17 International Paper Company Ink-printed ovenable food containers

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3702218A1 (en) * 1987-01-26 1987-10-22 Klaus Balke Environmentally friendly drying method for web-fed offset printing

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4595611A (en) * 1985-06-26 1986-06-17 International Paper Company Ink-printed ovenable food containers

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Publication number Publication date
EP0425870A3 (en) 1993-03-10
DE3936043C2 (en) 1992-06-17
DE3936043A1 (en) 1991-05-02

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