EP1361074A1 - Method for improving the metallic appearance, the processability and the flexibility of resin coated decorative paper - Google Patents

Method for improving the metallic appearance, the processability and the flexibility of resin coated decorative paper Download PDF

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Publication number
EP1361074A1
EP1361074A1 EP02009270A EP02009270A EP1361074A1 EP 1361074 A1 EP1361074 A1 EP 1361074A1 EP 02009270 A EP02009270 A EP 02009270A EP 02009270 A EP02009270 A EP 02009270A EP 1361074 A1 EP1361074 A1 EP 1361074A1
Authority
EP
European Patent Office
Prior art keywords
water
sodium aluminate
process according
mixture
gravure printing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02009270A
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German (de)
French (fr)
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EP1361074B1 (en
Inventor
Heinz Kleinerüsskamp
Kimmo Suur-Nuuja
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.)
Keeeper GmbH
Original Assignee
OKT Kunststofftechnik GmbH
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
Priority to PT02009270T priority Critical patent/PT1361074E/en
Application filed by OKT Kunststofftechnik GmbH filed Critical OKT Kunststofftechnik GmbH
Priority to EP02009270A priority patent/EP1361074B1/en
Priority to AT02009270T priority patent/ATE298671T1/en
Priority to ES02009270T priority patent/ES2241919T3/en
Priority to DE50203499T priority patent/DE50203499D1/en
Priority to DK02009270T priority patent/DK1361074T3/en
Priority to AU2003242523A priority patent/AU2003242523A1/en
Priority to BRPI0309565-7A priority patent/BR0309565B1/en
Priority to PL373297A priority patent/PL201674B1/en
Priority to RU2004134585/12A priority patent/RU2304049C2/en
Priority to PCT/EP2003/004247 priority patent/WO2003091470A2/en
Priority to TR2004/03486T priority patent/TR200403486T2/en
Priority to US10/512,036 priority patent/US7348040B2/en
Publication of EP1361074A1 publication Critical patent/EP1361074A1/en
Application granted granted Critical
Publication of EP1361074B1 publication Critical patent/EP1361074B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B44C5/0469—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper

Definitions

  • the present invention relates to methods for improving the metallic effects and further processing criteria as well as the flexibility of resin-coated Decorative papers.
  • Printed decorative papers are used in the coating industry Coating of laminates, or they are directly on wood substitute panels applied for surface improvement and -beautification.
  • the further processing is done by impregnation with melamine resins, phenolic resins, urea resins as well as other mixed resin systems and other resin solutions as well by painting with chemically or physically curing paint systems.
  • Highly absorbent resin-impregnable decorative papers having a weight per unit area of 45 g / m 2 to 200 g / m 2 , preferably 70 g / m 2 to 90 g / m 2 , are used as materials for the substrates for the printed image and for the resin.
  • Water-dispersible decorative printing inks used are paints without organic solvents or with limited solvent content with exclusively organic color pigments and casein-based binder systems, as well as overpressure blends for mother-of-pearl based on polyurethanes.
  • RWO decorative printing inks are known, for example, under the trade names Hartmann / 761 series or Arcolor 1010/1012/3008/3017/5000/7000 and others, metallic effect colors T1332 / 761, T2630 / 761, Arcolor Ardeco brilliant silver, Ardeco brilliant mother among others, iridescent or iriondin ink.
  • Coated wood materials are made by pulling the high-pressure laminate panels (HPL) by mechanically / thermally imageable edges, in pre-milled Wood material, achieved during the bending process. This procedure is called Postforming called.
  • Conventionally produced standard base papers can be in the high pressure laminate area (HPL) not or only insufficiently around these tight Deforming radii, for example in the manufacture of countertops or Furniture fronts with rounded edges.
  • Base papers so-called postforming papers used, this after the State of the art.
  • the sandwich panels themselves receive at the critical narrow radii on the opposite side of the coating differently shaped notches or milling, as described for example in DE19830778C1. The At the outer edge of the sheet applied paper layer is here, however, considerably stretched.
  • optical and physical properties as well as the achieved metallic effect of the Finished wood-based materials are further decisive quality criteria.
  • the maximum optical effects are achieved by applying the highest possible quantities of paint scored in decor printing. These are rear cylinder with the largest possible used theoretical ink transfer volume. The maximum possible Ink transfer is limited by the drying capacity of the printing presses.
  • Binder household reduces the fixation of the pigments on the decorative paper and causes during the impregnation a bleeding of the decor pressure, which in the Flooding of larger amounts of metallic effect pigments in the resin liquor shows.
  • the binder content is too low, the abrasion resistance of the non-resinated material is negligible printed decorative paper so down that a run of the printed paper web as a web through the steering rollers in the impregnating without damage the print image is hardly possible.
  • the possibilities, higher metal effects By increasing the paint job to achieve, are thus limited.
  • the problems are as follows: Unhomogeneous dark and blotchy surfaces, possibly "nacreous abscissa". Increased metallic ink coverage will not result in improved nacreous or metallic effects achieved more.
  • the general solution according to the invention is to delay the curing Solutions of basic metal salts during gravure printing applied. This can help improve the postforming properties the inexpensive plain papers are used, and a costly chemical Pre-treatment of special papers is eliminated.
  • Metallic salts in basic Range are used for improving postforming properties. Furthermore, the improvement of the gloss level and the Metal effects and the reduction of pressing errors, as described above achieved. Further features, details and embodiments emerge from the subclaims.
  • HPL high-pressure laminate sector
  • the fund of homogeneous color funds on decorative papers with basis weights of 70 g / m 2 to 90 g / m 2
  • planar coating methods such as flexographic printing, Haschurwalzen Lucas or similar methods should be possible.
  • the transfer of surface ink quantities should take place wet with high ink coverage on printed or unprinted decorative papers.
  • the ink transfer in rotogravure should be done with a rear cylinder.
  • a gravure printing unit of a Dekor briefly horrinskymaschine is with a pressure cylinder printed with a homogeneously engraved grid, which is always used here as a "rear cylinder” referred to as.
  • the color transfer to the rear cylinder takes place from storage containers by means of electric pumps or pneumatic diaphragm pumps.
  • the metal effect color is constantly stirred to prevent sedimentation and over the Pumps kept in circulation. From the storage containers, the color is in the color pans conveyed under the rear cylinder into the printing unit of Dekortiefdruckmaschine.
  • the application of the metallic effect color takes place by means of An Hugheswalzen, which with a lasered and slightly compressible rubber coating are coated. By means of this will be picked up the paint from the paint tray and applied to the printing cylinder.
  • the rear cylinder is dipped directly into the color stand of the paint tray and picks up a color film on the surface and in the wells.
  • the rear cylinder is further passed by a squeegee, which the excess Metal effect color from the cylinder surface scratches and only a defined Quantity of paint left in a so-called cup.
  • the cylinder comes into the pressure zone.
  • the paper web that over Drives and guide rollers of the pressure zone of the printing unit is supplied by means of a Pressed with mechanical pressure roller pressed on the cylinder.
  • the force with which this press called roller presses the paper is usually 18 N / cm, depending on the application also a higher force.
  • a sodium aluminate solution (Water or water / waste mixture) in the gravure printing method by means of a Rear cylinder applied to the surface of Metallic horre.
  • This is a significantly increased pearlescent or metallic effect with simultaneous improvement Surface homogeneity HPL / LPM achieved.
  • Nacreous pigments are compounds in the form of feldspar or silicic acid (silicon dioxide), which are coated with titanium dioxide.

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  • Printing Methods (AREA)
  • Laminated Bodies (AREA)
  • Paper (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

A process for improving metal effect and further processing criteria and the flexibility of decorative paper coated with resin involves applying solutions of basic metal salts which delay hardening during the intaglio printing of metal effect colors.

Description

Die vorliegende Erfindung bezieht sich auf Verfahren zum Verbessern der Metalleffekte und Weiterverarbeitungskriterien sowie der Flexibilität von harzbeschichteten Dekorpapieren. Bedruckte Dekorpapiere dienen in der Beschichtungsindustrie zur Beschichtung von Schichtstoffen, oder sie werden direkt auf Holzersatzstoffplatten zur Oberflächenverbesserung und -Verschönerung aufgebracht. Die Weiterverarbeitung geschieht mittels Imprägnierung mit Melaminharzen, Phenolharzen, Harnstoffharzen sowie sonstigen Mischharzsystemen und anderen Harzlösungen sowie durch Lackierung mit chemisch oder physikalisch härtenden Lacksystemen. Nach der Bedruckung und Imprägnierung entsteht als nächstes Zwischenprodukt ein beharzter Dekorfilm als Vorprodukt für die Verpressung im Kurztaktverfahren auf Spanplatten und andere Holzwerkstoffe (KT bzw. LPM Verfahren), für die Verpressung mit weiteren Phenolharz- oder anderen harzimprägnierten Papieren im Hochdruckverfahren zu dekorativen Schichtstoffen (DKS bzw. HPL Verfahren) sowie im kontinuierlichen Pressverfahren (CPL Verfahren).The present invention relates to methods for improving the metallic effects and further processing criteria as well as the flexibility of resin-coated Decorative papers. Printed decorative papers are used in the coating industry Coating of laminates, or they are directly on wood substitute panels applied for surface improvement and -beautification. The further processing is done by impregnation with melamine resins, phenolic resins, urea resins as well as other mixed resin systems and other resin solutions as well by painting with chemically or physically curing paint systems. After Printing and impregnation is the next intermediate of a resin Decorative film as precursor for short-cycle compression on chipboard and other wood-based materials (KT or LPM method), for the compression with other Phenol resin or other resin impregnated papers in the high pressure process to decorative laminates (DKS or HPL method) and in continuous Pressing method (CPL method).

Als Materialien für die Träger für das Druckbild sowie für das Harz werden hierbei hochsaugfähige harzimprägnierbare Dekorpapiere mit einem Flächengewicht von 45 g/m2 bis 200 g/m2, vorzugsweise 70 g/m2 bis 90 g/m2, verwendet. Als wasserdispergierbare Dekordruckfarben kommen Farben ohne organische Lösemittel bzw. mit begrenztem Lösemittelanteil mit ausschließlich organischen Farbpigmenten und Kasein-basierenden Bindersystemen als auch Überdruckverschnitte für Perlmutt auf Polyuhrethanbasis zum Einsatz. Handelsübliche RWO Dekordruckfarben sind z.B. unter den Handelsnamen Hartmann/761-Serie oder Arcolor 1010/1012/3008/3017/5000/7000 u.a., Metalleffektfarben T1332/761, T2630/761, Arcolor Ardeco Brillantsilber, Ardeco Brillantperlmutt u.a., irisierende oder Iriondinfarbe bekannt.Highly absorbent resin-impregnable decorative papers having a weight per unit area of 45 g / m 2 to 200 g / m 2 , preferably 70 g / m 2 to 90 g / m 2 , are used as materials for the substrates for the printed image and for the resin. Water-dispersible decorative printing inks used are paints without organic solvents or with limited solvent content with exclusively organic color pigments and casein-based binder systems, as well as overpressure blends for mother-of-pearl based on polyurethanes. Commercially available RWO decorative printing inks are known, for example, under the trade names Hartmann / 761 series or Arcolor 1010/1012/3008/3017/5000/7000 and others, metallic effect colors T1332 / 761, T2630 / 761, Arcolor Ardeco brilliant silver, Ardeco brilliant mother among others, iridescent or iriondin ink.

Es gibt mehrere Probleme. Bei der Weiterverarbeitung kommt der Verformbarkeit der imprägnierten Dekorfilme eine besondere Bedeutung zu. Abgerundete Kanten an beschichteten Holzwerkstoffen werden durch Herumziehen der Hochdruckschichtstoffplatten (HPL) durch mechanisch/thermisch ausbildbare Kanten, in vorgefrästem Holzwerkstoff, während des Biegevorgangs erreicht. Dieses Verfahren wird als Postforming bezeichnet. Herkömmlich hergestellte Standardbasispapiere lassen sich im Hochdruckschichtstoffbereich (HPL) nicht oder nur unzureichend um diese engen Radien nachverformen, beispielsweise bei der Herstellung von Arbeitsplatten oder Möbelfronten mit abgerundeten Kanten. Hier werden zur Zeit sehr teure speziell hergestellte Basispapiere, sogenannte Postformingpapiere verwendet, dies nach dem Stand der Technik. Die Schichtplatten selbst erhalten an den kritischen engen Radien auf der der Beschichtung gegenüberliegenden Seite verschieden geformte Kerben oder Fräsungen, wie dies beispielsweise in DE19830778C1 beschrieben ist. Die am äußeren Bogenrand aufgebrachte Papierschicht wird hierbei jedoch erheblich gereckt.There are several problems. During further processing comes the deformability of the impregnated decorative films to a special importance. Rounded edges Coated wood materials are made by pulling the high-pressure laminate panels (HPL) by mechanically / thermally imageable edges, in pre-milled Wood material, achieved during the bending process. This procedure is called Postforming called. Conventionally produced standard base papers can be in the high pressure laminate area (HPL) not or only insufficiently around these tight Deforming radii, for example in the manufacture of countertops or Furniture fronts with rounded edges. Here are currently very expensive specially made Base papers, so-called postforming papers used, this after the State of the art. The sandwich panels themselves receive at the critical narrow radii on the opposite side of the coating differently shaped notches or milling, as described for example in DE19830778C1. The At the outer edge of the sheet applied paper layer is here, however, considerably stretched.

Der minimale Radius, in dem ein Dekorfilm ohne Beeinträchtigung des Pressergebnisses um eine Holzwerkstoffkante gezogen werden kann, kann maßgeblich nach dem Disc Cure Wert bestimmt werden. Je höher der Disc Cure Wert, desto langsamer ist die Reaktivität des Dekorpapierharzverbundes, desto "weicher" ist das Papier bei der Weiterverarbeitung.The minimum radius in which a decorative film without affecting the Pressergebnisses can be pulled around a wooden material edge, can be significantly after the Disc Cure value. The higher the disc cure value, the slower is the reactivity of the decorative paper resin composite, the "softer" is the paper during further processing.

Es ist deshalb eine Aufgabe der Erfindung, herkömmliche Standardbasispapiere den jeweiligen Kundenwünschen auch in diesem Marktsegment anzupassen.It is therefore an object of the invention to provide conventional standard base papers to adapt to customer wishes in this market segment as well.

Die optischen und physikalischen Eigenschaften sowie der erzielte Metalleffekt des fertig beschichteten Holzwerkstoffes sind weitere entscheidende Qualitätskriterien. The optical and physical properties as well as the achieved metallic effect of the Finished wood-based materials are further decisive quality criteria.

Die maximalen optischen Effekte werden durch den Auftrag möglichst hoher Farbmengen beim Dekordruck erzielt. Dazu werden Fondzylinder mit möglichst großem theoretischen Farbübertragungsvolumen eingesetzt. Die maximal mögliche Farbübertragung ist limitiert durch die Trockenkapazität der Druckmaschinen.The maximum optical effects are achieved by applying the highest possible quantities of paint scored in decor printing. These are rear cylinder with the largest possible used theoretical ink transfer volume. The maximum possible Ink transfer is limited by the drying capacity of the printing presses.

Höhere Pigmentkonzentration in der Metalleffektfarbe erhöht deutlich das Risiko von Druckfehlern wie Streifen, Ablegen von Metallpigmenten und anderen. Ein zu geringer Bindemittelhaushalt reduziert die Fixierung der Pigmente auf dem Dekorpapier und verursacht bei der Imprägnierung ein Ausbluten des Dekordrucks, der sich im Ausschwemmen größerer Mengen Metalleffektpigmente in der Harzflotte zeigt. Zudem setzt ein zu geringer Bindemittelhaushalt die Scheuerfestigkeit des unbeharzten bedruckten Dekorpapieres so herab, dass ein Durchlauf der bedruckten Papierbahn als Bahnware durch die Lenkungswalzen in den Imprägnierbädern ohne Beschädigung des Druckbildes kaum möglich ist. Die Möglichkeiten, höhere Metalleffekte durch Erhöhung des Farbauftrages zu erzielen, sind somit begrenzt. Die Probleme sind wie folgt: Unhomogene dunkle und fleckige Oberflächen, ggf. "Perlmuttabsakken". Durch einen gesteigerten Metallicfarbauftrag werden keine verbesserten Perlmutt- bzw. Metalliceffekte mehr erzielt.Higher pigment concentration in the metallic effect color significantly increases the risk of Printing errors such as streaks, depositing metal pigments and others. One too low Binder household reduces the fixation of the pigments on the decorative paper and causes during the impregnation a bleeding of the decor pressure, which in the Flooding of larger amounts of metallic effect pigments in the resin liquor shows. moreover If the binder content is too low, the abrasion resistance of the non-resinated material is negligible printed decorative paper so down that a run of the printed paper web as a web through the steering rollers in the impregnating without damage the print image is hardly possible. The possibilities, higher metal effects By increasing the paint job to achieve, are thus limited. The problems are as follows: Unhomogeneous dark and blotchy surfaces, possibly "nacreous abscissa". Increased metallic ink coverage will not result in improved nacreous or metallic effects achieved more.

Es ist deshalb eine weitere Aufgabe der Erfindung, den Glanzgrad und den Metalleffekt auf der bedruckten Oberfläche zu steigern sowie die Qualität der beschichteten Oberfläche durch Reduzierung von sichtbaren Pressfehlern zu steigern.It is therefore another object of the invention to improve the gloss level and the metallic effect on the printed surface increase as well as the quality of the coated Surface to increase by reducing visible pressing errors.

Die allgemeine Lösung besteht erfindungsgemäß darin, das Aushärten verzögernde Lösungen von basischen Metallsalzen während des Bedruckens mittels Tiefdruck aufzubringen. Dadurch können für die Verbesserung der Postformingeigenschaften die kostengünstigen Normalpapiere verwendet werden, und eine kostspielige chemische Vorbehandlung von Spezialpapieren entfällt. Metallische Salze im basischen Bereich werden für die Verbesserung der Postformingeigenschaften eingesetzt. Weiterhin wird über dieses Verfahren die Verbesserung des Glanzgrades und der Metalleffekte sowie die Reduzierung von Pressfehlern, wie vorbeschrieben, erzielt. Weitere Merkmale, Einzelheiten und Ausgestaltungen ergeben sich aus den Unteransprüchen. The general solution according to the invention is to delay the curing Solutions of basic metal salts during gravure printing applied. This can help improve the postforming properties the inexpensive plain papers are used, and a costly chemical Pre-treatment of special papers is eliminated. Metallic salts in basic Range are used for improving postforming properties. Furthermore, the improvement of the gloss level and the Metal effects and the reduction of pressing errors, as described above achieved. Further features, details and embodiments emerge from the subclaims.

Wie oben erläutert, lassen sich normal hergestellte Standardbasispapiere im Hochdruckschichtstoffbereich (HPL) nicht oder nur unzureichend um enge Radien nachverformen.As explained above, normally produced standard base papers can be used in the high-pressure laminate sector (HPL) not or only inadequate to deform tight radii.

Im Gegensatz dazu wird nach einem Ausführungsbeispiel der Erfindung durch Aufbringen einer Natriumaluminatlösung (Wasser oder Wasser/Verschnittgemisch) im Tiefdruckverfahren mit Fond oder einem anderen geeigneten Verfahren auf das bedruckte oder unbedruckte Standardbasispapier die Aushärtungsgeschwindigkeit des Imprägnates (Basispapier/ Harz) beim Verpressen verringert und bewirkt somit den gewünschten Effekt der Nachformbarkeit. Hierzu wird Natriumaluminat (=NaAlO2x0,12Na2Ox0,3H2O) gelöst. Dies erfolgt in mehreren Schritten:

  • Natriumaluminat → Diese Chemikalie wird in > 60 °C heißem demineralisiertem Wasser (oder Wasser allgemein) aufgelöst, um so das Gemisch in der gewünschten Konzentration herzustellen;
  • Feststoffgehalt 0,5 bis maximal 5 % bezogen auf den gesamten druckfertigen Ansatz;
  • pH-Wert → Je nach Erfordernis zwischen pH 9 bis 14 einstellen;
  • Auftrag der fertigen Lösung auf das Papier mittels Fond im Tiefdruck. Dies in Abhängigkeit von Fondvolumen und der Maschinengeschwindigkeit. Richtwerte bzw. Sollwertvorgabe minimal 3 g/m2 bis maximal 25 g/m2 nass;
  • Prüfmethode der Aushärtungsgeschwindigkeit mit der branchenüblichen Methode "Disc Cure Test".
In contrast, according to an embodiment of the invention, by applying a sodium aluminate solution (water or water / blend mixture) by gravure or other suitable method to the printed or unprinted standard base paper, the curing speed of the impregnate (base paper / resin) during pressing is reduced and thus effected the desired effect of the Nachformbarkeit. For this purpose, sodium aluminate (= NaAlO 2 x0.12Na 2 Ox0.3H 2 O) is dissolved. This is done in several steps:
  • Sodium aluminate → This chemical is dissolved in> 60 ° C hot demineralized water (or water in general) to make the mixture in the desired concentration;
  • Solids content of 0.5 to a maximum of 5% based on the total ready-to-print batch;
  • pH value → Adjust between pH 9 to 14 as required;
  • Application of the finished solution to the paper by means of gravure gravure printing. This depends on the volume of the fuselage and the speed of the machine. Guideline values or setpoint specification minimum 3 g / m 2 to maximum 25 g / m 2 wet;
  • Cure speed test method using industry standard Disc Cure Test method.

Für die Aufgabe, den Druck der vorgenannten handelsüblichen Metalleffektfarben auf Standarddekorpapier als Fläche oder in Kombination mit Holz-, Stein- oder graphischen Dekoren, vorzugsweise den Fond von homogenen Farbfonds auf Dekorpapiere mit Flächengewichten von 70 g/m2 bis 90 g/m2 zu ermöglichen, soll der Druck als Rotationstiefdruck endlos von Rolle auf Rolle ermöglicht werden. Alternativ hierzu sollen auch flächige Beschichtungsverfahren wie Flexodruck, Haschurwalzenauftrag oder ähnliche Verfahren möglich sein. Die Übertragung von flächigen Farbmengen soll nass mit hoher Farbbelegung auf bedruckte oder unbedruckte Dekorpapiere stattfinden. Die Farbübertragung im Rotationstiefdruck soll mit einem Fondzylinder erfolgen.For the task of printing the aforementioned commercial metallic effect colors on standard decorative paper as a surface or in combination with wood, stone or graphic decors, preferably the fund of homogeneous color funds on decorative papers with basis weights of 70 g / m 2 to 90 g / m 2 To allow the pressure as rotogravure endlessly from roll to roll to be made possible. Alternatively, planar coating methods such as flexographic printing, Haschurwalzenauftrag or similar methods should be possible. The transfer of surface ink quantities should take place wet with high ink coverage on printed or unprinted decorative papers. The ink transfer in rotogravure should be done with a rear cylinder.

Es sollen Dekortiefdruckmaschinen bis zu einer Bahnbreite von 2.750 mm mit konventionellem Tiefdruckwerk und Heißlufttrocknungen verwendet werden. Die Tiefdruckfondzylinder sind elektromechanisch graviert, lasergraviert bzw. geätzt. Stand der Technik sind Fondzylinder mit einer keramischen Oberfläche, in die per Lasertechnik die Näpfchen eingebrannt sind. Alternativ kommen konventionell elektromechanisch in eine Kupferoberfläche gravierte Zylinder zum Einsatz, die anschließend mit einer Chromschicht gegen mechanische Einwirkungen geschützt werden.It will Dekortiefdruckmaschinen up to a web width of 2,750 mm with conventional Gravure printing and hot air drying can be used. The Tiefdruckfondzylinder are electro-mechanically engraved, laser-engraved or etched. was standing The technology consists of rear cylinders with a ceramic surface, in which by laser technology the cups are baked. Alternatively come conventionally electromechanical in a copper surface engraved cylinder for use, which subsequently protected with a chrome layer against mechanical effects.

In einem Tiefdruckwerk einer Dekortiefdruckmaschine wird mit einem Druckzylinder mit einem homogen gravierten Rasterfeld gedruckt, der hier stets als "Fondzylinder" bezeichnet wird. Die Farbübertragung auf den Fondzylinder erfolgt aus Vorratsbehältern mittels elektrischer Pumpen oder pneumatischer Membranpumpen. Die Metalleffektfarbe wird zur Verhinderung der Sedimentation ständig gerührt und über die Pumpen im Umlauf gehalten. Aus den Vorratsbehältern wird die Farbe in die Farbwannen unter den Fondzylinder in das Druckwerk der Dekortiefdruckmaschine gefördert. Der Antrag der Metalleffektfarbe erfolgt mittels Anspülwalzen, die mit einer gelaserten und leicht kompressiblen Gummierung beschichtet sind. Mittels dieser wird die Farbe aus der Farbwanne aufgenommen und an den Druckzylinder angetragen. Alternativ wird der Fondzylinder direkt in den Farbstand der Farbwanne getaucht und nimmt einen Farbfilm an der Oberfläche und in den Näpfchen auf. In Rotationsrichtung wird der Fondzylinder weiter an einer Rakel vorbeigeführt, welche die überschüssige Metalleffektfarbe von der Zylinderoberfläche abrakelt und nur eine definierte Menge Farbe in einem sogenannten Näpfchen zurücklässt. Weiter in Rotationsrichtung kommt der Zylinder in die Druckzone. Hier wird die Papierbahn, die über Antriebe und Leitwalzen der Druckzone des Druckwerkes zugeführt wird, mittels einer mit mechanischem Druck beaufschlagten Walze auf den Zylinder gedrückt. Die Kraft, mit der diese Presseur genannte Walze das Papier anpresst, beträgt üblicherweise um 18 N/cm, je nach Anwendungsfall auch eine höhere Kraft. Durch den Druck sowie Flieh-, Kohäsions- und Kapillarkräfte wird die Farbe aus dem Näpfchen auf und in das Papier übertragen. Nach der Druckzone wird das bedruckte feuchte Papier über Leitwalzen dem Heißlufttrockner der Druckmaschine zugeführt, wo mittels Heißluft mit Temperaturen bis 150 °C und Luftgeschwindigkeiten bis 50 m/sec das als Farbenlösemittel verwendete Wasser wieder ausgetrieben wird. Um auf dem Fertigprodukt eine Farbfläche mit metallischem Effekt darzustellen, werden Metalleffektfarben wie die oben genannten Perlmuttfarben verwendet. Die Homogenität nach dem Druck und nach der Weiterverarbeitung wie auch die erzielbare Farbstärke sind entscheidende Qualitätskriterien. Bedingt durch den hohen Binder- und Pigmentauftrag wird die poröse Oberfläche des Dekorpapieres geschlossen, so dass die Harzaufnahmefähigkeit herabgesetzt und besonders verlangsamt wird. In der Folge werden die erzielbaren Imprägniergeschwindigkeiten deutlich reduziert, was die Wirtschaftlichkeit der Imprägnierung vermindert. Die Fixierung der Metalleffektpigmente ist schwieriger als bei herkömmlichen Dekorfarben, so dass entweder besondere Bindersysteme in der Metalleffektfarbe wie auch bei dem zusätzlich erforderlichen Verschnitt/Binder eingesetzt werden. Alternativ wird ein zusätzlicher Fond ausschließlich mit Verschnitt auf die Metalleffektfarbe gedruckt, um die Metalleffektpigmente besser zu fixieren. Zur Steigerung des Glanzgrades und des Metalleffektes auf der bedruckten Oberfläche ist der Druck mehrerer Schichten Metalleffektfarbe über Wiederholung des Druckvorganges in weiteren Druckwerken möglich. Die genaue Einstellung der Färbung, verglichen zu dem Referenzmuster, ist jedoch kaum möglich, da hieraus größere und kaum kontrollierbare Änderungen der Färbung entstehen. Weiterhin wird durch jeden weiteren Druckgang die Papieroberfläche weiter geschlossen, was die Porosität des Dekorpapieres reduziert und damit die Imprägnierbarkeit beeinträchtigt. In der Folge muss die Geschwindigkeit des Imprägnierprozesses reduziert werden. Bei der Verwendung von Effektfarben (Perlmutt, Silber und irisierende Farben) in höheren Konzentrationen (> 5%) auf den jeweils bedruckten Dekorpapieren können Probleme auf dem Endprodukt, wie oben erwähnt erkennbar werden (Endprodukte = HPL Elemente/ LPM Elemente). Dennoch kann erfindungsgemäß für Effektfarben (Perlmutt, Silber und irisierende Farben) in höheren Konzentrationen (> 5 %) auf den jeweils bedruckten Dekorpapieren eine Natriumaluminatlösung (Wasser oder Wasser/Verschnitt-Gemisch) im Tiefdruckverfahren mit Fond auf die Oberfläche der Metallicdrucke aufgebracht werden.In a gravure printing unit of a Dekortiefdruckmaschine is with a pressure cylinder printed with a homogeneously engraved grid, which is always used here as a "rear cylinder" referred to as. The color transfer to the rear cylinder takes place from storage containers by means of electric pumps or pneumatic diaphragm pumps. The metal effect color is constantly stirred to prevent sedimentation and over the Pumps kept in circulation. From the storage containers, the color is in the color pans conveyed under the rear cylinder into the printing unit of Dekortiefdruckmaschine. The application of the metallic effect color takes place by means of Anspülwalzen, which with a lasered and slightly compressible rubber coating are coated. By means of this will be picked up the paint from the paint tray and applied to the printing cylinder. Alternatively, the rear cylinder is dipped directly into the color stand of the paint tray and picks up a color film on the surface and in the wells. In the direction of rotation the rear cylinder is further passed by a squeegee, which the excess Metal effect color from the cylinder surface scratches and only a defined Quantity of paint left in a so-called cup. Next in the direction of rotation the cylinder comes into the pressure zone. Here is the paper web that over Drives and guide rollers of the pressure zone of the printing unit is supplied by means of a Pressed with mechanical pressure roller pressed on the cylinder. The The force with which this press called roller presses the paper is usually 18 N / cm, depending on the application also a higher force. By the pressure as well as centrifugal, cohesive and capillary forces, the color from the well on and transferred to the paper. After the print zone becomes the printed wet paper fed via guide rollers to the hot air dryer of the printing press, where by means of Hot air with temperatures up to 150 ° C and air speeds up to 50 m / sec the is used as paint solvent used water expelled again. To get on the finished product To create a color surface with a metallic effect becomes metallic effect colors like the above mother of pearl colors used. The homogeneity after the pressure and after further processing as well as the achievable color strength decisive quality criteria. Due to the high binder and pigment application the porous surface of the decor paper is closed so that the resin receptivity is lowered and slowed down especially. In the episode will be the achievable impregnation speeds significantly reduced, which the economic efficiency the impregnation is reduced. The fixation of the metallic effect pigments is more difficult than traditional decor colors, so either special Binder systems in the metallic effect color as well as the additional required Cuttings / binders are used. Alternatively, an additional fund will be exclusive printed with cut to the metallic effect color to the metallic effect pigments better to fix. To increase the gloss level and the metallic effect on the printed surface is the printing of several layers of metallic effect paint via repetition of the printing process in other printing possible. The exact Adjustment of the coloration compared to the reference pattern, however, is scarcely possible, as this results in larger and barely controllable changes in the color. Furthermore, the paper surface will continue through each additional print run closed, which reduces the porosity of the decorative paper and thus the impregnability impaired. As a result, the speed of the impregnation process must be be reduced. When using effect colors (mother of pearl, silver and iridescent colors) in higher concentrations (> 5%) on the respective printed Decor papers may have problems on the final product, as noted above (end products = HPL elements / LPM elements). Nevertheless, according to the invention for effect colors (mother of pearl, silver and iridescent colors) in higher Concentrations (> 5%) on the printed decor papers a sodium aluminate solution (Water or water / waste mixture) in the gravure printing method with Fond applied to the surface of the metallic prints.

Nach einem weiteren Ausführungsbeispiel der Erfindung wird eine Natriumaluminatlösung (Wasser oder Wasser/Verschnitt-Gemisch) im Tiefdruckverfahren mittels eines Fondzylinders auf die Oberfläche der Metallicdrucke aufgebracht. Hierbei wird ein deutlich gesteigerter Perlmutt- bzw. Metalliceffekt mit gleichzeitiger Verbesserung der Oberflächenhomogenität HPL/ LPM erreicht.According to a further embodiment of the invention, a sodium aluminate solution (Water or water / waste mixture) in the gravure printing method by means of a Rear cylinder applied to the surface of Metallicdrucke. This is a significantly increased pearlescent or metallic effect with simultaneous improvement Surface homogeneity HPL / LPM achieved.

Hierbei wird wiederum in folgenden Schritten vorgegangen:

  • Natriumaluminat → Diese Chemikalie wird in > 60 °C heißem demineralisiertem Wasser (oder Wasser allgemein) aufgelöst, um so das Gemisch in der gewünschten Konzentration herzustellen;
  • Feststoffgehalt 0,5 bis maximal 5 % bezogen auf den gesamten druckfertigen Ansatz (Wasser oder Wasser/Verschnitt);
  • pH-Wert → Je nach Erfordernis zwischen pH 9 bis 14 einstellen;
  • Auftrag der fertigen Lösung auf das Papier mittels Fond im Tiefdruck, dies in Abhängigkeit vom Fondvolumen und der Maschinengeschwindigkeit. Richtwerte bzw. Sollvorgaben minimal 3 g/m2 bis maximal 25 g/m2 nass.
Here again the following steps are used:
  • Sodium aluminate → This chemical is dissolved in> 60 ° C hot demineralized water (or water in general) to make the mixture in the desired concentration;
  • Solids content of 0.5 to a maximum of 5% based on the total ready-to-print batch (water or water / blend);
  • pH value → Adjust between pH 9 to 14 as required;
  • Application of the finished solution to the paper by means of gravure in the background, this depending on the fund volume and the machine speed. Guideline values or target specifications minimum 3 g / m 2 to a maximum of 25 g / m 2 wet.

Perlmuttpigmente sind Verbindungen in Form von Feldspat bzw. Kieselsäure (Silicondioxid), welche mit Titandioxid gecoatet sind.Nacreous pigments are compounds in the form of feldspar or silicic acid (silicon dioxide), which are coated with titanium dioxide.

Titandioxid wirkt als Katalysator (beschleunigte Aushärtung bei aminoplastischen Harzen); daher wirkt sich der geeignet eingestellte Überdruck positiv auf das Aushärtungsverhalten (Harzfluss) bei gleichzeitiger Verbesserung der Perlmuttwirkung aus.
Verwendbare aminoplastische Harze sind beispielsweise:

  • Melamin-Formaldehydharze
  • Harnstoff-Formaldehydharze
Titanium dioxide acts as a catalyst (accelerated curing in aminoplastic resins); therefore, the appropriately set overpressure has a positive effect on the curing behavior (resin flow) with simultaneous improvement of the mother of pearl effect.
Useful aminoplastic resins include:
  • Melamine-formaldehyde resins
  • Urea-formaldehyde resins

Claims (16)

Verfahren zum Verbessern der Metalleffekte und Weiterverarbeitungskriterien sowie der Flexibilität von harzbeschichteten Dekorpapieren gekennzeichnet durch Aufbringen von das Aushärten verzögernde Lösungen von basischen Metallsalzen während des Bedruckens mit Metalleffektfarben mittels Tiefdruck.A method for improving the metallic effects and processing criteria and the flexibility of resin-coated decorative papers characterized by applying hardening retarding solutions of basic metal salts during printing with metallic effect inks by gravure printing. Verfahren nach Anspruch 1 gekennzeichnet durch Aufbringen einer Natriumaluminatlösung (=NaAlO2x0,12Na2Ox0,3H2O) (Wasser oder Wasser/Verschnitt-Gemisch) im Tiefdruckverfahren mit Fondzylinder oder einem anderen geeigneten Verfahren auf bedrucktes oder unbedrucktes Standardbasispapier.A method according to claim 1 characterized by applying a sodium aluminate solution (= NaAlO 2 x0.12Na 2 Ox0.3H 2 O) (water or water / blend mixture) by gravure printing with rear cylinder or other suitable method on printed or unprinted standard base paper. Verfahren nach Anspruch 2 dadurch gekennzeichnet, dass Natriumalumniat in > 60 °C heißem demineralisiertem Wasser (oder Wasser allgemein) aufgelöst wird, um ein Gemisch in der gewünschten Konzentration herzustellen.A method according to claim 2, characterized in that sodium alumnate is dissolved in> 60 ° C hot demineralized water (or water in general) to produce a mixture in the desired concentration. Verfahren nach Anspruch 3 dadurch gekennzeichnet, dass das Gemisch eine Konzentration von 10 bis 20 % hat.A method according to claim 3, characterized in that the mixture has a concentration of 10 to 20%. Verfahren nach Ansprüchen 1 bis 3 dadurch gekennzeichnet, dass das Natriumaluminat einen Feststoffgehalt von 0,5 bis maximal 5 % bezogen auf den gesamten druckfertigen Ansatz hat. Process according to Claims 1 to 3, characterized in that the sodium aluminate has a solids content of from 0.5 to a maximum of 5% based on the total ready-to-print batch. Verfahren nach Ansprüchen 1 bis 5 dadurch gekennzeichnet, dass für das Natriumaluminat ein pH-Wert je nach Erfordernis zwischen pH 9 bis 14 eingestellt wird.Process according to Claims 1 to 5, characterized in that, for the sodium aluminate, a pH value of between 9 and 14 is set as required. Verfahren nach Ansprüchen 1 bis 6 dadurch gekennzeichnet, dass das Natriumaluminat in der fertigen Lösung auf das Papier mittels Fondzylinder im Tiefdruck in Abhängigkeit vom Fondvolumen und der Maschinengeschwindigkeit aufgebracht wird,Process according to Claims 1 to 6, characterized in that the sodium aluminate in the finished solution is applied to the paper by means of a gravure cylinder in the gravure printing in dependence on the volume of the backing and the speed of the machine, Verfahren nach Ansprüchen 7 dadurch gekennzeichnet, dass ein Richtwert bzw. eine Sollwertvorgabe minimal 3 g/m2 bis maximal 25 g/m2 nass eingehalten wird.Process according to claims 7, characterized in that a standard value or a setpoint specification of at least 3 g / m 2 to a maximum of 25 g / m 2 wet is maintained. Verfahren nach Anspruch 1 dadurch gekennzeichnet, dass für Effektfarben (Perlmutt, Silber und irisierende Farben) in höheren Konzentrationen (> 5 %) auf den jeweils bedruckten Dekorpapieren eine Natriumaluminatlösung (Wasser oder Wasser/Verschnitt-Gemisch) im Tiefdruckverfahren mit Fond auf die Oberfläche der Metallicdrucke aufgebracht wird.A method according to claim 1, characterized in that for effect colors (mother of pearl, silver and iridescent colors) in higher concentrations (> 5%) on each printed decorative papers a Natriumaluminatlösung (water or water / waste mixture) in the gravure printing with Fond on the surface of the Metallic prints is applied. Verfahren nach Anspruch 9 dadurch gekennzeichnet, dass das Natriumaluminat in > 60 °C heißem demineralisiertem Wasser (oder Wasser allgemein) aufgelöst wird, um so ein Gemisch in der gewünschten Konzentration herzustellen.A method according to claim 9, characterized in that the sodium aluminate is dissolved in> 60 ° C hot demineralized water (or water in general) so as to produce a mixture in the desired concentration. Verfahren nach Ansprüchen 1 und 8 - 10 dadurch gekennzeichnet, dass Natriumaluminat einen Feststoffgehalt von 0,5 bis maximal 5 %, bezogen auf den gesamten druckfertigen Ansatz, hat.Process according to Claims 1 and 8-10, characterized in that sodium aluminate has a solids content of from 0.5 to a maximum of 5%, based on the total ready-to-print batch. Verfahren nach Ansprüchen 1, 8 - 11 dadurch gekennzeichnet, dass für das Natriumaluminat ein pH-Wert, je nach Erfordernis zwischen pH 9 bis 14 eingestellt wird. Process according to Claims 1, 8 - 11, characterized in that a pH value is adjusted for the sodium aluminate, depending on the requirement, between pH 9 to 14. Verfahren nach Ansprüchen 1, 8 - 12 dadurch gekennzeichnet, dass das Natriumaluminat in der fertigen Lösung auf das Papier mittels Fondzylinder im Tiefdruck in Abhängigkeit von Fondvolumen und der Maschinengeschwindigkeit aufgetragen wird.Process according to Claims 1, 8-12, characterized in that the sodium aluminate in the finished solution is applied to the paper by means of a rear cylinder in gravure printing as a function of the volume of the backing and the speed of the machine. Verfahren nach Anspruch 13 dadurch gekennzeichnet, dass ein Richtwert bzw. eine Sollwertvorgabe minimal 3 g/m2 bis maximal 25 g/m2 nass eingehalten wird.A method according to claim 13, characterized in that a guide value or a setpoint specification minimum of 3 g / m 2 to a maximum of 25 g / m 2 wet is maintained. Verfahren nach Anspruch 9 dadurch gekennzeichnet, dass als Perlmuttpigmente Verbindungen in Form von Feldspat bzw. Kieselsäure (Silicondioxid) eingesetzt werden, welche mit Titandioxid gecoatet sind, wobei das Titandioxid als Katalysator zur beschleunigten Aushärtung bei aminoplastischen Harzen führt und der geeignet eingestellte Überdruck positiv auf das Aushärtungsverhalten (Harzfluss) wirkt und gleichzeitig die Perlmuttwirkung verbessert wird.A method according to claim 9, characterized in that are used as pearlescent pigments in the form of feldspar or silica (silicon dioxide), which are coated with titanium dioxide, wherein the titanium dioxide as a catalyst for accelerated curing in aminoplastic resins leads and the suitably set positive pressure on the Curing behavior (resin flow) acts and at the same time the nacreous effect is improved. Verfahren nach Anspruch 15 dadurch gekennzeichnet, dass als aminoplastische Harze Melamin-Formaldehydharze oder Harnstoff-Formaldehydharze verwendet werden.A method according to claim 15, characterized in that are used as aminoplastic resins melamine-formaldehyde resins or urea-formaldehyde resins.
EP02009270A 2002-04-26 2002-04-26 Method for improving the metallic appearance, the processability and the flexibility of resin coated decorative paper Expired - Lifetime EP1361074B1 (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
EP02009270A EP1361074B1 (en) 2002-04-26 2002-04-26 Method for improving the metallic appearance, the processability and the flexibility of resin coated decorative paper
AT02009270T ATE298671T1 (en) 2002-04-26 2002-04-26 METHOD FOR IMPROVING METAL EFFECTS, FURTHER PROCESSING CRITERIA AND FLEXIBILITY OF RESIN COATED DECORATIVE PAPERS
ES02009270T ES2241919T3 (en) 2002-04-26 2002-04-26 PROCEDURE TO IMPROVE METAL EFFECTS AND PROCESSING CRITERIA.
DE50203499T DE50203499D1 (en) 2002-04-26 2002-04-26 Method for improving the metallic effects, the further processing criteria and the flexibility of resin-coated decorative papers
DK02009270T DK1361074T3 (en) 2002-04-26 2002-04-26 Process for improving the metal effects, further processing criteria and the flexibility of resin coated decor paper
PT02009270T PT1361074E (en) 2002-04-26 2002-04-26 METHOD FOR IMPROVING METAL EFFECTS, FINISHING CRITERIA AND FLEXIBILITY OF RESIN-COATED DECORATIVE PAPER
AU2003242523A AU2003242523A1 (en) 2002-04-26 2003-04-24 Method for improving the metallic effects and further processing criteria and flexibility of decorative paper coated with resin
BRPI0309565-7A BR0309565B1 (en) 2002-04-26 2003-04-24 Method for enhancing metal effects and further processing criteria, as well as the flexibility of resin coated decor papers
PL373297A PL201674B1 (en) 2002-04-26 2003-04-24 Method for improving the metallic effects and further processing criteria and flexibility of decorative paper coated with resin
RU2004134585/12A RU2304049C2 (en) 2002-04-26 2003-04-24 Method of improving appearance of metal
PCT/EP2003/004247 WO2003091470A2 (en) 2002-04-26 2003-04-24 Method for improving the metallic effects and further processing criteria and flexibility of decorative paper coated with resin
TR2004/03486T TR200403486T2 (en) 2002-04-26 2003-04-24 The method of improving the metal effects of resin coated decorative papers
US10/512,036 US7348040B2 (en) 2002-04-26 2003-04-24 Method for improving characteristics of resin coated papers comprising applying a solution of one or more alkaline metal salts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02009270A EP1361074B1 (en) 2002-04-26 2002-04-26 Method for improving the metallic appearance, the processability and the flexibility of resin coated decorative paper

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EP1361074A1 true EP1361074A1 (en) 2003-11-12
EP1361074B1 EP1361074B1 (en) 2005-06-29

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EP (1) EP1361074B1 (en)
AT (1) ATE298671T1 (en)
AU (1) AU2003242523A1 (en)
BR (1) BR0309565B1 (en)
DE (1) DE50203499D1 (en)
DK (1) DK1361074T3 (en)
ES (1) ES2241919T3 (en)
PL (1) PL201674B1 (en)
PT (1) PT1361074E (en)
RU (1) RU2304049C2 (en)
TR (1) TR200403486T2 (en)
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US3730828A (en) * 1971-03-23 1973-05-01 Plastics Manuf Co Postformable laminate comprising a barrier sheet of wood fiber impregnated with fully cured unplasticized melamine-formaldehyde resin
DE2537409A1 (en) * 1975-08-22 1977-03-03 Roemmler H Resopal Werk Gmbh Decorative laminated panel for furniture and interior decoration - combining phenolic resin and polyester to gain strength and flexibility
DE2658784A1 (en) * 1976-12-24 1978-07-13 Holtzmann & Cie Ag E LEAF-SHAPED EDITION AND MANUFACTURING PROCESS FOR IT
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TR200403486T2 (en) 2005-05-23
RU2004134585A (en) 2005-05-10
ES2241919T3 (en) 2005-11-01
EP1361074B1 (en) 2005-06-29
US20060008586A1 (en) 2006-01-12
BR0309565A (en) 2005-04-05
PL201674B1 (en) 2009-04-30
RU2304049C2 (en) 2007-08-10
PT1361074E (en) 2005-11-30
AU2003242523A1 (en) 2003-11-10
US7348040B2 (en) 2008-03-25
ATE298671T1 (en) 2005-07-15
WO2003091470A2 (en) 2003-11-06
BR0309565B1 (en) 2014-04-01
AU2003242523A8 (en) 2003-11-10
DK1361074T3 (en) 2005-08-29
PL373297A1 (en) 2005-08-22
WO2003091470A3 (en) 2004-04-01

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