EP2293947B2 - Use of a printing paper printed with a pattern for sheetlike components - Google Patents

Use of a printing paper printed with a pattern for sheetlike components Download PDF

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Publication number
EP2293947B2
EP2293947B2 EP09772060.1A EP09772060A EP2293947B2 EP 2293947 B2 EP2293947 B2 EP 2293947B2 EP 09772060 A EP09772060 A EP 09772060A EP 2293947 B2 EP2293947 B2 EP 2293947B2
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EP
European Patent Office
Prior art keywords
printing
paper
ink
printing paper
digital
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EP09772060.1A
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German (de)
French (fr)
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EP2293947A1 (en
EP2293947B1 (en
Inventor
Udo Tünte
Richard Schwitte
Frank Petersen
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Flooring Industries Ltd SARL
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Flooring Industries Ltd SARL
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Application filed by Flooring Industries Ltd SARL filed Critical Flooring Industries Ltd SARL
Priority to EP15169902.2A priority Critical patent/EP2942201B1/en
Priority to PL09772060.1T priority patent/PL2293947T5/en
Publication of EP2293947A1 publication Critical patent/EP2293947A1/en
Application granted granted Critical
Publication of EP2293947B1 publication Critical patent/EP2293947B1/en
Priority to HRP20160010TT priority patent/HRP20160010T1/en
Publication of EP2293947B2 publication Critical patent/EP2293947B2/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
    • B41J11/00216—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using infrared [IR] radiation or microwaves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0022—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using convection means, e.g. by using a fan for blowing or sucking air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/18—Particular kinds of wallpapers
    • 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
    • B41M5/0011—Pre-treatment or treatment during printing of the recording material, e.g. heating, irradiating
    • 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
    • B41M7/009—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using thermal means, e.g. infrared radiation, heat

Definitions

  • the invention relates to the use of a printing paper printed with a decor for flat components. Furthermore, the invention relates to a method for producing decorative paper for use in flat components, in particular for floor, wall, ceiling or furniture applications, according to the preamble of claim 2.
  • a method of the type mentioned at the beginning and a related printing device are already available from the EP 1 749 676 A1 known.
  • the known method is used to digitally print printing paper that is used to produce flat components such as covering boards, panels and the like.
  • the aim is to provide an inkjet printing process whereby the printing result on the surface of the objects to be printed should meet the highest quality requirements in terms of appearance.
  • a paper web that is absorbent for liquid synthetic resin along its entire thickness is soaked with liquid synthetic resin from one side in such a way that the synthetic resin does not completely penetrate the paper web, so that the other side of the paper web is at least largely free of synthetic resin.
  • the known method is intended to create surfaces that are optimally adapted to the known printing result through the selection of the paper and the ink liquid and, if necessary, a pretreatment of the surface to be printed.
  • the object of the present invention is to provide a decorative paper for flat components that has high print quality and can be produced easily and inexpensively using an appropriate process.
  • the invention represents a departure from the prior art, since it was previously considered necessary, despite the additional effort, to use the printed paper layer for applications as decorative paper at least partially resinated and/or with an ink-receiving layer.
  • a non-resinized printing paper that is free of an ink-receiving layer on the printing side is used for printing and that the printing paper is applied before, during and/or after printing and/or the printing ink immediately after application the printing paper is heated.
  • This method is defined in detail in claim 2.
  • a common gravure paper without a line is used for digital printing. Until now, the correct assumption has been made that normal printing paper is not suitable for digital printing because this paper acts like blotting paper when printed.
  • the aforementioned problem can be solved by heating or heating the printing paper before, during and/or after printing and/or the printing ink immediately after it has been applied to the printing paper.
  • This heating causes the ink to dry very quickly on the printing paper, so that, depending on the type of paper and heating temperature, the aforementioned problems do not occur or only occur to a minor extent.
  • Tests have shown that the printing result is almost as good as when using printing paper with an ink-receiving layer.
  • the aforementioned heating leads to immediate drying of the ink on the printing paper as soon as the ink has been released from the print head and applied to the top of the printing paper.
  • the present invention has the very important advantage that neither a complex partial resin coating before printing nor the application of an ink-receiving layer is required, so that the printing paper to be used in the invention is very cost-effective.
  • the printing paper In order to achieve rapid drying, taking into account the special features of the digital printing process, especially when using water-based inks/printing inks, it is advantageous for the printing paper to be heated from the top and/or bottom of the printing paper.
  • the (drying) heating should preferably be carried out at a temperature of above 35 °C, in particular between 40 °C and 60 °C. Very good results, which on the one hand lead to quick drying and on the other hand do not affect the printing, were achieved at temperatures between 49 °C and 54 °C.
  • the drop size of the printing ink during printing should be between 4.0 ng and 50 ng, while the printing speed should be greater than 3 m 2 /h.
  • the printing speed is preferably between 4 and 50 m 2 /h and in particular between 6 and 30 m 2 /h.
  • the printing paper is heated in a drying room which is located within a housing that houses the printing device, i.e. H. surrounds the actual digital printer of the printing device.
  • a drying room which is located within a housing that houses the printing device, i.e. H. surrounds the actual digital printer of the printing device.
  • this is a narrow, elongated enclosure that roughly corresponds to the dimensions of the printer, which ultimately limits the heat energy applied during heating to the area of the printer and the printing paper located there.
  • the invention provides that the air within the drying space is constantly circulated during heating. Circulation also means that fresh air is supplied and air containing moisture is removed.
  • the digital printing device 1 has a substructure 2 with a paper guide 3 for printing paper 4. Furthermore, the digital printing device 1 has a carriage guide 5 which is attached to the substructure 2. The carriage guide 5 extends over the entire width of the substructure 2 and is located above the paper guide 3. A printer carriage 6 can be moved along the carriage guide 5. Connected to the printer carriage 6 is an ink tank 7, which can have a corresponding number of printing colors. What is not shown is that the printer carriage 6 has at least one print head for spraying ink/printing ink onto the printer paper transported through the digital printing device 1.
  • the digital printing device 1 is preceded by a paper feed 8, while a paper discharge 9 is connected downstream.
  • the printing paper 4 is fed to the paper feed 8 in roll form, printed in the digital printing device 1 and rolled up again as decorative paper at the paper discharge 9.
  • the rolled-up printed printing paper 4 or decorative paper is removed from the paper discharge 9 and treated with resin.
  • the printing paper is then cut to the desired size and finally pressed with appropriate plates to form flat components for floor, wall, ceiling and/or furniture applications.
  • two heating devices 10, 11 are provided for heating the printing paper 4 before, during and after printing and for heating the printing ink after it has been applied to the printing paper 4. It goes without saying that it is also possible in principle to provide further heating devices, for example in the area of the paper feed or between the paper feed and the digital printing device 1.
  • the heating devices 10, 11 both extend at least essentially over the entire width of the paper guide 3.
  • the heating devices 10, 11 ultimately run transversely to the conveying direction F. Since the paper guide 3 can have a maximum width of greater than 3 m, the two heating devices have 10, 11 an appropriate length.
  • the heating device 1.0 is arranged behind the print head or print heads in the conveying direction F and is primarily used to dry the printing ink after it has been applied to the top of the printing paper 4.
  • the heating device 10 is designed as an IR heater, which has a fan 12 assigned to the fresh air supply.
  • the blower 12 itself, the length of which at least essentially corresponds to the length of the heating device 10, is arranged above the heating device 10, with both structural units in turn being arranged above the printer carriage 6.
  • the blowing direction of the fan 12 is directed vertically downwards.
  • at least one baffle 13 is provided, which is directed vertically downwards.
  • the heating device 10 and the fan 12 are located only a few centimeters behind the print head of the printer carriage 6 in the conveying direction F in order to be able to dry the applied printing ink immediately after it has been applied to the printing paper 4.
  • the printer carriage 6 Since the heating device 10 is located in the vertical direction at least in some areas above the printer carriage 6, the printer carriage 6 is therefore directly exposed to the thermal influence of the heating device 10, there is a heat protection cover 14 above the printer carriage 6 and also above the ink tank 7, which in the present case is angled or is designed in a staircase shape and thermally insulates the surfaces of the printer carriage 6 and the ink tank 7 immediately adjacent to the heating device 10. It goes without saying that the width of the thermal protection cover 14 corresponds at least essentially to the width of the printer carriage 6. The thermal protection cover 14 is firmly connected to the printer carriage 6 and can be moved with it.
  • the further heating device 11 which is provided for preheating the printing paper 4 on the underside.
  • the further heating device 11 only extends in the conveying direction F to just in front of the printer carriage 6.
  • the further heating device 11 it is also fundamentally possible for the further heating device 11 to extend over a larger area of the paper guide 3, i.e. H. can extend under the printer carriage 6.
  • the digital printing device 1 is arranged in a housing 15 together with the heating device 10, at least in some areas.
  • the housing 15 extends at least essentially over the entire width of the digital printing device 1 and thus ultimately runs transversely to the conveying direction F. Except for a slot, not shown in detail, for the passage of the printing paper 4, the present housing 15 is rectangular in cross section on the top and bottom as well closed at the front and back. This results in a drying space 16 between the paper stirrer 3 and the inside housing 15.
  • the housing 15 and thus the drying space 16 are open at least in some areas at the front.
  • One front panel 17 is shown in the figure.
  • the cover 17 ends above the printer carriage 6, so that it is accessible if necessary.
  • a corresponding cover is provided on the opposite side.
  • the housing 15 itself has a width between 40 cm and 50 cm and a height between 50 cm and 60 cm with a length that corresponds approximately to the length of the digital printing device 1.
  • the length of the digital printing device 1 is approximately 2.5 m, while the width of the paper feed is approximately 2.1 m.
  • a temperature of approximately 52 ° C is applied via the heating device 10 and a temperature of approximately 50 ° C is applied via the further heating device 11.
  • the further heating device 11 supports the drying of the printing ink after it has been applied to the top of the printing paper 4 by preheating the underside of the printing paper 4.
  • the printing paper 4 itself is a non-resinized paper with no ink-receiving layer on the printing side, on which the printing ink would run without drying and which, due to the high water content of the printing ink 4, would expand and then curl without drying, which would make further processing impossible .

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Ink Jet (AREA)
  • Paper (AREA)
  • Laminated Bodies (AREA)
  • Printing Methods (AREA)

Description

Die Erfindung betrifft die Verwendung eines mit einem Dekor bedruckten Druckpapiers für flächige Bauteile. Desweiteren betrifft die Erfindung ein Verfahren zur Herstellung von Dekorpapier zur Verwendung bei flächigen Bauteilen, insbesondere für Boden-, Wand-, Decken- oder Möbelanwendungen, nach dem Oberbegriff des Anspruchs 2.The invention relates to the use of a printing paper printed with a decor for flat components. Furthermore, the invention relates to a method for producing decorative paper for use in flat components, in particular for floor, wall, ceiling or furniture applications, according to the preamble of claim 2.

Ein Verfahren der eingangs genannten Art sowie eine diesbezügliche Druckvorrichtung sind bereits aus der EP 1 749 676 A1 bekannt. Das bekannte Verfahren wird eingesetzt, um Druckpapier digital zu bedrucken, das zur Herstellung von flächigen Bauteilen, wie Belagsplatten, Paneelen u. dgl. verwendet wird.A method of the type mentioned at the beginning and a related printing device are already available from the EP 1 749 676 A1 known. The known method is used to digitally print printing paper that is used to produce flat components such as covering boards, panels and the like.

Bei der EP 1 749 676 A1 geht es darum, ein Tintenstrahldruckverfahren zur Verfügung zu stellen, wobei das Druckergebnis auf der Oberfläche der zu bedruckenden Gegenstände hinsichtlich des Aussehens höchsten Qualitätsanforderungen entsprechen soll. Hierzu ist vorgesehen, daß eine längs ihrer gesamten Dicke für flüssiges Kunstharz saugfähige Papierbahn von einer Seite her derart mit flüssigen Kunstharz getränkt wird, daß das Kunstharz die Papierbahn nicht vollständig durchdringt, so daß die andere Seite der Papierbahn zumindest weitgehend frei von Kunstharz ist. Durch das bekannte Verfahren sollen Oberflächen geschaffen werden, die durch die Auswahl des Papiers und der Farbflüssigkeit sowie ggf. einer Vorbehandlung der zu bedruckenden Oberfläche jeweils optimal an das bekannte Druckergebnis angepaßt sind.At the EP 1 749 676 A1 The aim is to provide an inkjet printing process whereby the printing result on the surface of the objects to be printed should meet the highest quality requirements in terms of appearance. For this purpose, it is provided that a paper web that is absorbent for liquid synthetic resin along its entire thickness is soaked with liquid synthetic resin from one side in such a way that the synthetic resin does not completely penetrate the paper web, so that the other side of the paper web is at least largely free of synthetic resin. The known method is intended to create surfaces that are optimally adapted to the known printing result through the selection of the paper and the ink liquid and, if necessary, a pretreatment of the surface to be printed.

Allerdings ist im Zusammenhang mit der aus der EP 1 749 676 A1 bekannten, halb durchbeharzten Papierbahn festgestellt worden, daß es in Abhängigkeit des eingesetzten Papiermaterials und der verwendeten Tinte gerade bei hoher Farbdichte und/oder hohem Wasseranteil dazu kommen kann, daß die mit der Papierbahn in Berührung kommende Tinte im oberen, nicht oder nur geringfügig beharzten Bereich verläuft und sich hierdurch der sogenannte Löschblatteffekt ergibt. Die Folge ist ein relativ unbefriedigendes Druckergebnis.However, in connection with the from the EP 1 749 676 A1 known, semi-resinized paper web, it has been found that, depending on the paper material used and the ink used, especially with high color density and / or a high water content, it can happen that the ink that comes into contact with the paper web is in the upper, not or only slightly resinous area and this results in the so-called blotter effect. The result is a relatively unsatisfactory printing result.

Zur Vermeidung des Löschblatteffekts ist es im übrigen auch bekannt, ein Druckpapier zu verwenden, das auf seiner Druckseite eine Tintenaufnahmeschicht aufweist. Hierbei handelt es sich üblicherweise um einen sogenannten Pigmentstrich. Diesbezüglich wird beispielsweise auf die DE 199 16 546 C2 verwiesen.To avoid the blotter effect, it is also known to use a printing paper that has an ink-receiving layer on its printing side. This is usually a so-called pigment line. In this regard, for example, the DE 199 16 546 C2 referred.

Von Nachteil sowohl bei dem aus der EP 1 749 676 A1 als auch aus dem aus der DE 199 16 546 C2 bekannten Druckpapier ist jedoch, daß diese Papiere vergleichsweise teuer sind. Sowohl die vor dem Druck notwendige unterseitige Teilbeharzung als auch der oberseitige Pigmentstrich fuhren zu zusätzlichen Kosten, was sich gerade bei einem Massenartikel wie Druckpapier für die genannten Anwendungen, bei denen große Mengen an Druckpapier benötigt werden, ungünstig auswirkt.A disadvantage both in the case of the EP 1 749 676 A1 as well as from the from the DE 199 16 546 C2 known printing paper, however, is that these papers are comparatively expensive. Both the partial resin on the bottom and the top pigment coating required before printing lead to additional costs, which is particularly unfavorable for a mass-produced item such as printing paper for the applications mentioned in which large quantities of printing paper are required.

Aus der US 2007/176994 A1 geht bereits ein Verfahren zur Herstellung von Tapeten hervor, wobei das Druckpapier durch eine digitale Druckvorrichtung bedruckt wird. Das Druckpapier wird erwärmt, um die Druckfarbe zu trocknen.From the US 2007/176994 A1 There is already a process for producing wallpaper, whereby the printing paper is printed using a digital printing device. The printing paper is heated to dry the printing ink.

Aufgabe der vorliegenden Erfindung ist es, ein Dekorpapier für flächige Bauteile zur Verfügung zu stellen, das eine hohe Druckqualität aufweist und einfach und kostengünstig über ein entsprechendes Verfahren herstellbar ist.The object of the present invention is to provide a decorative paper for flat components that has high print quality and can be produced easily and inexpensively using an appropriate process.

Zur Lösung der vorgenannten Aufgabe wird eine Verwendung nach Anspruch 1 vorgeschlagen.To solve the aforementioned problem, a use according to claim 1 is proposed.

Die Erfindung stellt eine Abkehr des Standes der Technik dar, da es bisher trotz des zusätzlichen Aufwands als notwendig erachtet wurde, die bedruckte Papierschicht für die Anwendungsfälle als Dekorpapier zumindest teilbeharzt und/oder mit einer Tintenaufnahmeschicht einzusetzen.The invention represents a departure from the prior art, since it was previously considered necessary, despite the additional effort, to use the printed paper layer for applications as decorative paper at least partially resinated and/or with an ink-receiving layer.

Zur Lösung der vorgenannten Aufgabe ist bei einem Verfahren der eingangs genannten Art erfindungsgemäß vorgesehen, daß zum Drucken ein unbeharztes und druckseitig tintenaufhahmeschichtfreies Druckpapier verwendet wird und daß das Druckpapier vor, während und/oder nach dem Drucken und/oder die Druckfarbe unmittelbar nach dem Aufbringen auf das Druckpapier erwärmt wird. Im Einzelnen ist dieses Verfahren im Anspruch 2 definiert. Bei der vorliegenden Erfindung wird im Gegensatz zum Stand der Technik ein übliches Tiefdruckpapier ohne Strich zum Digitaldruck verwendet. Bisher ist man von der an sich richtigen Annahme ausgegangen, daß normales Druckpapier für den Digitaldruck nicht geeignet ist, da dieses Papier beim Bedrucken wie ein Löschpapier wirkt. Hierbei verlaufen nicht nur die Farben beim Aufbringen der Druckfarbe, es ist auch so, daß das Papier Feuchtigkeit aus der Druckfarbe aufnimmt, was zu einer Längung oder Ausdehnung des Papiers führt. Hierdurch ergibt sich dann eine Wellung des bedruckten Druckpapiers. Dies führt letztlich zu einem nicht mehr verwendbaren Druckpapier. Daher wurde es trotz des zusätzlichen Aufwands bisher als notwendig erachtet, die bedruckte Papierschicht für den Anwendungsfall der Verwendung als Dekorpapier für flächige Bauteile zumindest teilbeharzt und/oder mit einer Tintenaufnahmeschicht einzusetzen.To solve the aforementioned problem, in a method of the type mentioned at the outset, it is provided according to the invention that a non-resinized printing paper that is free of an ink-receiving layer on the printing side is used for printing and that the printing paper is applied before, during and/or after printing and/or the printing ink immediately after application the printing paper is heated. This method is defined in detail in claim 2. In the present invention, in contrast to the prior art, a common gravure paper without a line is used for digital printing. Until now, the correct assumption has been made that normal printing paper is not suitable for digital printing because this paper acts like blotting paper when printed. Not only do the colors run when the printing ink is applied, it is also the case that the paper absorbs moisture from the printing ink, which leads to elongation or expansion of the paper. This then results in curling of the printed printing paper. This ultimately leads to printing paper that can no longer be used. Therefore, despite the additional effort, it was previously considered necessary to use the printed paper layer at least partially resinated and/or with an ink-receiving layer for use as decorative paper for flat components.

Im Zusammenhang mit der vorliegenden Erfindung ist nun festgestellt worden, daß das vorgenannte Problem dadurch gelöst werden kann, daß das Druckpapier vor, während und/oder nach dem Bedrucken und/oder die Druckfarbe unmittelbar nach dem Aufbringen auf das Druckpapier erwärmt bzw. beheizt wird. Durch diese Beheizung findet eine sehr schnelle Trocknung der Tinte auf dem Druckpapier statt, so daß es, je nach Papierart und Erwärmungstemperatur, nicht oder nur geringfügig zu den vorgenannten Problemen kommt. Bei Versuchen ist festgestellt worden, daß das Druckergebnis fast so gut wie bei der Verwendung eines Druckpapiers mit Farbaufnahmeschicht ist. Die vorgenannte Beheizung führt im besten Falle zu einer unmittelbaren Trocknung der Tinte auf dem Druckpapier, sobald die Tinte vom Druckkopf abgegeben und auf die Oberseite des Druckpapiers aufgebracht worden ist. In jedem Falle ergibt sich durch die vorliegende Erfindung der ganz wesentliche Vorteil, daß weder eine aufwendige Teilbeharzung vor dem Druck noch das Aufbringen einer Farbaufnahmeschieht erforderlich ist, so daß das bei der Erfindung einzusetzende Druckpapier sehr kostengünstig ist.In connection with the present invention, it has now been found that the aforementioned problem can be solved by heating or heating the printing paper before, during and/or after printing and/or the printing ink immediately after it has been applied to the printing paper. This heating causes the ink to dry very quickly on the printing paper, so that, depending on the type of paper and heating temperature, the aforementioned problems do not occur or only occur to a minor extent. Tests have shown that the printing result is almost as good as when using printing paper with an ink-receiving layer. In the best case, the aforementioned heating leads to immediate drying of the ink on the printing paper as soon as the ink has been released from the print head and applied to the top of the printing paper. In any case, the present invention has the very important advantage that neither a complex partial resin coating before printing nor the application of an ink-receiving layer is required, so that the printing paper to be used in the invention is very cost-effective.

Zur Erzielung einer schnellen Trocknung unter Berücksichtigung der Besonderheiten des digitalen Druckverfahrens insbesondere bei Einsatz von wasserbasierten Tinten/Druckfarben ist es günstig, daß die Erwärmung des Druckpapiers von der Ober- und/oder Unterseite des Druckpapiers her erfolgt. Dabei sollte die (Trocknungs-)Erwärmung vorzugsweise bei einer Temperatur von oberhalb 35 °C, insbesondere zwischen 40 °C und 60 °C durchgeführt werden. Sehr gute Ergebnisse, die einerseits zu einer schnellen Trocknung führen und andererseits aber den Druck nicht beeinträchtigen, sind bei Temperaturen zwischen 49 °C und 54 °C erreicht worden.In order to achieve rapid drying, taking into account the special features of the digital printing process, especially when using water-based inks/printing inks, it is advantageous for the printing paper to be heated from the top and/or bottom of the printing paper. The (drying) heating should preferably be carried out at a temperature of above 35 °C, in particular between 40 °C and 60 °C. Very good results, which on the one hand lead to quick drying and on the other hand do not affect the printing, were achieved at temperatures between 49 °C and 54 °C.

Die Erzielung eines optimalen Druckergebnisses ist neben der Trocknungstemperatur auch von der Tropfengröße bzw. dem Tropfgewicht der Druckfarbe einerseits und der Druckgeschwindigkeit andererseits abhängig. Erfindungsgemäß ist festgestellt worden, daß die Tropfengröße der Druckfarbe beim Drucken zwischen 4,0 ng und 50 ng liegen sollte, während die Druckgeschwindigkeit größer 3 m2/h liegen sollte. Bevorzugt liegt die Druckgeschwindigkeit zwischen 4 und 50 m2/h und insbesondere zwischen 6 und 30 m2/h.Achieving an optimal printing result depends not only on the drying temperature but also on the drop size or drop weight of the printing ink on the one hand and the printing speed on the other. According to the invention, it has been determined that the drop size of the printing ink during printing should be between 4.0 ng and 50 ng, while the printing speed should be greater than 3 m 2 /h. The printing speed is preferably between 4 and 50 m 2 /h and in particular between 6 and 30 m 2 /h.

Um eine möglichst effektive Erwärmung zu gewährleisten und ein Aufheizen von umgebenden Einrichtungen zu verhindern, erfolgt die Erwärmung des Druckpapiers in einem Trocknungsraum, der sich innerhalb eines Gehäuses befindet, das die Druckvorrichtung, d. h. den eigentlichen Digitaldrucker der Druckvorrichtung umgibt. Letztlich handelt es sich hierbei um eine etwa den Abmaßen des Druckers entsprechende, schmale, langgestreckte Einhausung, die letztlich die bei der Erwärmung aufgebrachte Wärmeenergie auf den Bereich des Druckers und das dort befindliche Druckpapier beschränkt.In order to ensure the most effective heating possible and to prevent surrounding devices from heating up, the printing paper is heated in a drying room which is located within a housing that houses the printing device, i.e. H. surrounds the actual digital printer of the printing device. Ultimately, this is a narrow, elongated enclosure that roughly corresponds to the dimensions of the printer, which ultimately limits the heat energy applied during heating to the area of the printer and the printing paper located there.

Da bei der Trocknung der Druckfarbe ein vergleichsweise großer Flüssigkeitsteil verdampft, ist erfindungsgemäß vorgesehen, daß die Luft innerhalb des Trocknungsraums während der Erwärmung permanent umgewälzt wird. Dabei wird unter Umwälzung auch verstanden, daß Frischluft zugeführt und mit Feuchtigkeit beladende Luft abgeführt wird.Since a comparatively large portion of liquid evaporates during the drying of the printing ink, the invention provides that the air within the drying space is constantly circulated during heating. Circulation also means that fresh air is supplied and air containing moisture is removed.

Es versteht sich, daß die vorgenannten Verfahrensmerkmale sich grundsätzlich auch auf die eingangs genannte Verwendung beziehen.It goes without saying that the aforementioned process features also fundamentally relate to the use mentioned at the beginning.

Weitere Merkmale und Vorteile der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels anhand der Zeichnung, die eine schematische Seitenansicht einer Digitaldruckvorrichtung 1 zeigt. Die Digitaldruckvorrichtung 1 weist einen Unterbau 2 mit einer Papierführung 3 für Druckpapier 4 auf. Des weiteren weist die Digitaldruckvorrichtung 1 eine Schlittenführung 5 auf, die am Unterbau 2 befestigt ist. Die Schlittenführung 5 erstreckt sich über die gesamte Breite des Unterbaus 2 und befindet sich oberhalb der Papierführung 3. Entlang der Schlittenführung 5 ist ein Druckerschlitten 6 verfahrbar. Mit dem Druckerschlitten 6 verbunden ist ein Tintentank 7, der eine entsprechende Anzahl von Druckfarben aufweisen kann. Nicht dargestellt ist, daß der Druckerschlitten 6 wenigstens einen Druckkopf zum Aufsprühen von Tinte/Druckfarbe auf das durch die Digitaldruckvorrichtung 1 transportierte Druckerpapier aufweist.Further features and advantages of the present invention result from the following description of an exemplary embodiment based on the drawing, which shows a schematic side view of a digital printing device 1. The digital printing device 1 has a substructure 2 with a paper guide 3 for printing paper 4. Furthermore, the digital printing device 1 has a carriage guide 5 which is attached to the substructure 2. The carriage guide 5 extends over the entire width of the substructure 2 and is located above the paper guide 3. A printer carriage 6 can be moved along the carriage guide 5. Connected to the printer carriage 6 is an ink tank 7, which can have a corresponding number of printing colors. What is not shown is that the printer carriage 6 has at least one print head for spraying ink/printing ink onto the printer paper transported through the digital printing device 1.

Der Digitaldruckvorrichtung 1 vorgeschaltet ist eine Papierzuführung 8, während eine Papierabführung 9 nachgeschaltet ist. Das Druckpapier 4 wird in Rollenform der Papierzuführung 8 zugeführt, in der Digitaldruckvorrichtung 1 bedruckt und als Dekorpapier an der Papierabführung 9 wieder aufgerollt. Nach Beendigung des Druckes wird das aufgerollte bedruckte Druckpapier 4 bzw. Dekorpapier der Papierabführung 9 entnommen und beharzt. Anschließend wird das Druckpapier auf die gewünschten Zuschnitte geschnitten und schließlich mit entsprechenden Platten zu flächigen Bauteilen für Boden-, Wand-, Decken- und/oder Möbelanwendungen verpreßt.The digital printing device 1 is preceded by a paper feed 8, while a paper discharge 9 is connected downstream. The printing paper 4 is fed to the paper feed 8 in roll form, printed in the digital printing device 1 and rolled up again as decorative paper at the paper discharge 9. After printing has ended, the rolled-up printed printing paper 4 or decorative paper is removed from the paper discharge 9 and treated with resin. The printing paper is then cut to the desired size and finally pressed with appropriate plates to form flat components for floor, wall, ceiling and/or furniture applications.

Bei der dargestellten Ausführungsform ist es nun so, daß zwei Heizvorrichtungen 10, 11 zur Erwärmung des Druckpapiers 4, vor, während und nach dem Ducken sowie zur Erwärmung der Druckfarbe nach dem Aufbringen auf das Druckpapier 4 vorgesehen sind. Es versteht sich, daß es grundsätzlich auch möglich ist, weitere Heizvorrichtungen, beispielsweise im Bereich der Papierzuführung oder zwischen der Papierzuführung und der Digitaldruckvorrichtung 1 vorzusehen.In the embodiment shown, two heating devices 10, 11 are provided for heating the printing paper 4 before, during and after printing and for heating the printing ink after it has been applied to the printing paper 4. It goes without saying that it is also possible in principle to provide further heating devices, for example in the area of the paper feed or between the paper feed and the digital printing device 1.

Die Heizeinrichtungen 10, 11 erstrecken sich beide zumindest im wesentlichen über die gesamte Breite der Papierführung 3. Damit verlaufen die Heizeinrichtungen 10, 11 letztlich quer zur Förderrichtung F. Da die Papierführung 3 eine maximale Breite von größer 3 m haben kann, haben die beiden Heizeinrichtungen 10, 11 eine entsprechende Länge. Die Heizeinrichtung 1.0 ist in Förderrichtung F hinter dem Druckkopf oder den Druckköpfen angeordnet und dient zunächst einmal und im wesentlichen zur Trocknung der Druckfarbe nach dem Aufbringen auf die Oberseite des Druckpapiers 4. Vorliegend ist die Heizeinrichtung 10 als IR-Heizung ausgebindet, der ein Gebläse 12 zur Frischluftzufuhr zugeordnet ist. Das Gebläse 12 selbst, dessen Länge zumindest im wesentlichen der Länge der Heizeinrichtung 10 entspricht, ist oberhalb der Heizeinrichtung 10 angeordnet, wobei beide Baueinheiten wiederum oberhalb des Druckerschlittens 6 angeordnet sind. Damit das Gebläse 12 und die Wärmeenergie der Heizeinrichtung 10 unmittelbar auf die Oberseite des gerade bedruckten Druckpapiers 4 gerichtet werden, ist die Ausblasrichtung des Gebläses 12 senkrecht nach unten gerichtet. Zur Unterstützung dieser Ausrichtung ist wenigstens ein Leitblech 13 vorgesehen, das senkrecht nach unten gerichtet ist. Letztlich befindet sich die Heizeinrichtung 10 sowie das Gebläse 12 in Förderrichtung F nur wenige Zentimeter hinter dem Druckkopf des Druckerschlittens 6, um die aufgebrachte Druckfarbe unmittelbar nach dem Aufbringen auf das Druckpapier 4 trocknen zu können.The heating devices 10, 11 both extend at least essentially over the entire width of the paper guide 3. The heating devices 10, 11 ultimately run transversely to the conveying direction F. Since the paper guide 3 can have a maximum width of greater than 3 m, the two heating devices have 10, 11 an appropriate length. The heating device 1.0 is arranged behind the print head or print heads in the conveying direction F and is primarily used to dry the printing ink after it has been applied to the top of the printing paper 4. In the present case, the heating device 10 is designed as an IR heater, which has a fan 12 assigned to the fresh air supply. The blower 12 itself, the length of which at least essentially corresponds to the length of the heating device 10, is arranged above the heating device 10, with both structural units in turn being arranged above the printer carriage 6. So that the fan 12 and the thermal energy of the heating device 10 are directed directly onto the top of the printing paper 4 that is currently being printed, the blowing direction of the fan 12 is directed vertically downwards. To support this alignment, at least one baffle 13 is provided, which is directed vertically downwards. Ultimately, the heating device 10 and the fan 12 are located only a few centimeters behind the print head of the printer carriage 6 in the conveying direction F in order to be able to dry the applied printing ink immediately after it has been applied to the printing paper 4.

Da sich die Heizeinrichtung 10 in senkrechter Richtung zumindest bereichsweise oberhalb des Druckerschlittens 6 befindet, der Druckerschlitten 6 damit dem thermischen Einfluß der Heizeinrichtung 10 direkt ausgesetzt ist, befindet sich oberhalb des Druckerschlittens 6 und auch oberhalb des Tintentanks 7 eine Wärmeschutzabdeckung 14, die vorliegend winklig oder treppenförmig ausgebildet ist und die die der Heizeinrichtung 10 unmittelbar benachbarten Flächen des Druckerschlittens 6 und des Tintentanks 7 wärmeisoliert. Dabei versteht es sich, daß die Breite der Wärmeschutzabdeckung 14 zumindest im wesentlichen der Breite des Druckerschlittens 6 entspricht. Die Wärmeschutzabdeckung 14 ist fest mit dem Druckerschlitten 6 verbunden und mit diesem verfahrbar.Since the heating device 10 is located in the vertical direction at least in some areas above the printer carriage 6, the printer carriage 6 is therefore directly exposed to the thermal influence of the heating device 10, there is a heat protection cover 14 above the printer carriage 6 and also above the ink tank 7, which in the present case is angled or is designed in a staircase shape and thermally insulates the surfaces of the printer carriage 6 and the ink tank 7 immediately adjacent to the heating device 10. It goes without saying that the width of the thermal protection cover 14 corresponds at least essentially to the width of the printer carriage 6. The thermal protection cover 14 is firmly connected to the printer carriage 6 and can be moved with it.

Im Unterbau 2 der Digitaldruckvorrichtung 1 befindet sich im Bereich der Papierführung 3 in Förderrichtung F des Druckpapiers 4 vor dem Druckerkopf Die weitere Heizeinrichtung 11, die zur unterseitigen Vorwärmung des Druckpapiers 4 vorgesehen ist. Im dargestellten Ausführungsbeispiel erstreckt sich die weitere Heizeinrichtung 11 in Förderrichtung F lediglich bis kurz vor den Druckerschlitten 6. Allerdings ist es grundsätzlich auch möglich, daß sich die weitere Heizeinrichtung 11 auch über einen größeren Bereich der Papierführung 3, d. h. bis unter dem Druckerschlitten 6 hindurch, erstrecken kann.In the substructure 2 of the digital printing device 1 there is located in the area of the paper guide 3 in the conveying direction F of the printing paper 4 in front of the printer head the further heating device 11, which is provided for preheating the printing paper 4 on the underside. In the exemplary embodiment shown, the further heating device 11 only extends in the conveying direction F to just in front of the printer carriage 6. However, it is also fundamentally possible for the further heating device 11 to extend over a larger area of the paper guide 3, i.e. H. can extend under the printer carriage 6.

Im übrigen ist es bei der dargestellten Ausführungsform so, daß die Digitaldruckvorrichtung 1 zusammen mit der Heizvorrichtung 10 zumindest bereichsweise in einem Gehäuse 15 angeordnet ist. Das Gehäuse 15 erstreckt sich zumindest im wesentlichen über die gesamte Breite der Digitaldruckvorrichtung 1 und verläuft damit letztlich quer zur Förderrichtung F. Bis auf einen im einzelnen nicht dargestellten Schlitz zur Durchführung des Druckpapiers 4 ist das vorliegende im Querschnitt rechteckige Gehäuse 15 ober- und unterseitig sowie vorder- und rückseitig geschlossen. Hierdurch ergibt sich zwischen der Papierrührung 3 und dem innenseitigen Gehäuse 15 ein Trocknungsraum 16. Stirnseitig ist das Gehäuse 15 und damit der Trocknungsraum 16 zumindest bereichsweise offen. In der Figur ist die eine stirnseitige Verblendung 17 dargestellt. Die Verblendung 17 endet oberhalb des Druckerschlittens 6, so daß dieser bedarfsweise zugänglich ist. Eine entsprechende Verblendung ist auf der gegenüberliegenden Seite vorgesehen. Das Gehäuse 15 selbst hat eine Breite zwischen 40 cm und 50 cm und eine Höhe zwischen 50 cm und 60 cm bei einer Länge, die etwa der Länge der Digitaldruckvorrichtung 1 entspricht. Vorliegend beträgt die Länge der Digitaldruckvorrichtung 1 etwa 2,5 m, während die Breite der Papierzuführung etwa 2,1 m beträgt.Furthermore, in the embodiment shown, the digital printing device 1 is arranged in a housing 15 together with the heating device 10, at least in some areas. The housing 15 extends at least essentially over the entire width of the digital printing device 1 and thus ultimately runs transversely to the conveying direction F. Except for a slot, not shown in detail, for the passage of the printing paper 4, the present housing 15 is rectangular in cross section on the top and bottom as well closed at the front and back. This results in a drying space 16 between the paper stirrer 3 and the inside housing 15. The housing 15 and thus the drying space 16 are open at least in some areas at the front. One front panel 17 is shown in the figure. The cover 17 ends above the printer carriage 6, so that it is accessible if necessary. A corresponding cover is provided on the opposite side. The housing 15 itself has a width between 40 cm and 50 cm and a height between 50 cm and 60 cm with a length that corresponds approximately to the length of the digital printing device 1. In the present case, the length of the digital printing device 1 is approximately 2.5 m, while the width of the paper feed is approximately 2.1 m.

Verfahrensmäßig wird während des Druckens über die Heizeinrichtung 10 eine Temperatur von etwa 52 °C und über die weitere Heizeinrichtung 11 eine Temperatur von etwa 50 °C, aufgebracht. Dabei unterstützt die weitere Heizeinrichtung 11 durch die unterseitige Vorheizung des Druckpapiers 4 die Trocknung der Druckfarbe nach ihrem Aufbringen auf der Oberseite des Druckpapiers 4.During printing, a temperature of approximately 52 ° C is applied via the heating device 10 and a temperature of approximately 50 ° C is applied via the further heating device 11. The further heating device 11 supports the drying of the printing ink after it has been applied to the top of the printing paper 4 by preheating the underside of the printing paper 4.

Bei dem Druckpapier 4 selbst handelt es sich um ein unbeharztes und druckseitig tintenaufnahmeschichtfreies Papier, auf dem die Druckfarbe ohne die Trocknung verlaufen würde und das sich aufgrund des hohen Wasseranteils der Druckfarbe 4 ohne die Trocknung ausdehnen und anschließend wellen würde, was eine Weiterverarbeitung unmöglich machen würde.The printing paper 4 itself is a non-resinized paper with no ink-receiving layer on the printing side, on which the printing ink would run without drying and which, due to the high water content of the printing ink 4, would expand and then curl without drying, which would make further processing impossible .

Bezugszeichenliste:List of reference symbols:

11
DigitaldruckvorrichtungDigital printing device
22
Unterbausubstructure
33
Papierführungpaper guide
44
Druckpapierprinting paper
55
Schlittenführungcarriage guidance
66
Druckerschlittenprinter carriage
77
TintentankInk tank
88th
PapierzuführungPaper feed
99
PapierabführungPaper collection
1010
HeizeinrichtungHeating device
1111
HeizeinrichtungHeating device
1212
Gebläsefan
1313
LeitblechBaffle
1414
WärmeschutzabdeckungThermal protection cover
1515
GehäuseHousing
1616
TrocknungsraumDrying room
1717
Verblendungdelusion
FF
FörderrichtungDirection of conveyance

Claims (6)

  1. Use of a printing paper as a decor paper for planar components, in particular for floor, wall, ceiling or furniture applications, which printing paper has been printed by means of a digital printing process by a digital printing device (1) and which printing paper has been heated before, during and/or after printing to dry the printing ink on the printing paper and is resin-untreated and free of an ink-reception layer and is printed with a decor, wherein the printing paper (4), before printing, is supplied in roll form to a paper feed unit (8), wherein the paper feed unit (8) is connected upstream of the digital printing device (1), while a paper discharge unit (9) is connected downstream of the digital printing device (1), wherein the printing paper (4), after printing, is rolled up again as decor paper on the paper discharge unit (9), wherein the rolled printed decor paper, following the completion of the printing, is removed from the paper discharge unit (9) and treated with resin, is cut to the desired dimensions and is pressed together with plates to form the planar components.
  2. Method for manufacturing planar components, in particular for floor, wall, ceiling or furniture applications, using decor paper, wherein in the manufacture thereof printing paper (4) is printed with a decor by means of a digital printing process by a digital printing device (1) by means of printing ink, and wherein the printing paper (4) is heated before, during and/or after printing, and/or the printing ink is heated immediately after being deposited on the printing paper (4) to dry the printing ink on the printing paper,
    characterized in that
    for printing, a resin-untreated printing paper (4) is used, which is free from an ink-reception layer on its printing side, that a paper feed unit (8) is connected upstream of the digital printing device (1), while a paper discharge unit (9) is connected downstream of the digital printing device (1), that the printing paper (4) is supplied in roll form to the paper feed unit (8) and that the rolled printed decor paper, following the completion of the printing, is removed from the paper discharge unit (9) and treated with resin, is cut to the desired dimensions and is pressed together with plates for form the planar components.
  3. Method according to claim 2, characterized in that the heating of the printing paper (4) is performed from the upper side and/or the lower side of the printing paper (4) and/or that, by means of the heating, a drying is performed at a temperature above 35°C, in particular between 40°C and 60°C.
  4. Method according to any of the preceding claims, characterized in that the drop weight of the printing ink during printing is between 4.0 ng and 50.0 ng and that the printing speed is higher than 3 m2/h, preferably is between 4 m2/h and 50 m2/h, and in particular is between 6 m2/h and 30 m2/h.
  5. Method according to any of the preceding claims, characterized in that solvent-containing and/or water-containing ink is used as a printing ink.
  6. Method according to any of the preceding claims, characterized in that the heating of the printing paper (4) is performed in a drying room (16) forming a housing (15) surrounding the digital printing device (1), and that preferably the air inside the drying room (16) is permanently circulated during said heating.
EP09772060.1A 2008-07-02 2009-05-29 Use of a printing paper printed with a pattern for sheetlike components Active EP2293947B2 (en)

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EP15169902.2A EP2942201B1 (en) 2008-07-02 2009-05-29 Method for manufacturing decorative paper and digital printing apparatus for carrying out the method
PL09772060.1T PL2293947T5 (en) 2008-07-02 2009-05-29 Use of a printing paper printed with a pattern for sheetlike components
HRP20160010TT HRP20160010T1 (en) 2008-07-02 2016-01-05 Use of a printing paper printed with a pattern for sheetlike components

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EP2942201B1 (en) 2022-10-05
EP2942201A2 (en) 2015-11-11
DK2293947T3 (en) 2016-01-25
PL2293947T5 (en) 2024-01-15
PT2293947E (en) 2016-01-28
ES2557596T5 (en) 2024-05-03
HRP20160010T1 (en) 2016-02-12
EP2293947A1 (en) 2011-03-16
ES2557596T8 (en) 2019-01-16
ES2557596T3 (en) 2016-01-27
PL2293947T3 (en) 2016-04-29
HUE025840T2 (en) 2016-05-30
WO2010000360A1 (en) 2010-01-07
EP2942201A3 (en) 2015-12-30
DE102008030955B3 (en) 2009-11-19
EP2293947B1 (en) 2015-10-21

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