EP2392467B1 - Substrat für den Tintenstrahldruck - Google Patents

Substrat für den Tintenstrahldruck Download PDF

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Publication number
EP2392467B1
EP2392467B1 EP20100165096 EP10165096A EP2392467B1 EP 2392467 B1 EP2392467 B1 EP 2392467B1 EP 20100165096 EP20100165096 EP 20100165096 EP 10165096 A EP10165096 A EP 10165096A EP 2392467 B1 EP2392467 B1 EP 2392467B1
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Prior art keywords
range
sizing
substrate
cationic
compound
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EP20100165096
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English (en)
French (fr)
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EP2392467A1 (de
Inventor
Wim Ballet
Rainer Lex
Jan Philipp Weihs
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Sappi Netherlands Services BV
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Sappi Netherlands Services BV
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
    • B41M5/508—Supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5218—Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5245—Macromolecular coatings characterised by the use of polymers containing cationic or anionic groups, e.g. mordants

Definitions

  • the present invention relates to the field of uncoated inkjet substrates which are particularly suitable for high-speed inkjet printing and which are well printable with current high-speed inkjet printing devices.
  • Inkjet printing has become one of the most popular and commonly used printing techniques. There is a wide range of substrates but also a wide range of different printing devices available on the market.
  • Printable substrates which are useful for ink-jet printing can be coated with a strong pigmented layer which then acts as an ink receiving layer.
  • uncoated inkjet papers which normally on both sides are provided with a so-called sizing layer which is much thinner than the above-mentioned strong pigmented ink receiving layer and which may or may not comprise pigments.
  • EP 0 534 906 discloses a sizing process for the sizing of cellulosic fibre materials with polytertiary amine compounds.
  • the corresponding sizing formulations are applied at a pH of 7.5 such as to make sure that the compounds are cationic.
  • WO 2009/096922 discloses an inkjet printable substrate with a porous ink receiving layer and a sobbing layer.
  • the corresponding coating layer comprises a binder and a metal oxide particulate with an organosilane reagent.
  • WO 2006/067273 discloses a high-speed inkjet printing paper with a sizing layer containing of a single cationic fixing agent applied on the surface of the web.
  • the cationic fixing agent can for example be polydadmac.
  • US2004033377 pertains to a coating composition comprising a blend of at least two dye fixatives, at least one of which is a cationic polymer, and at least one of the other dye fixatives is a polyvalent metal salt, to form a water-insoluble complex.
  • the formation of this water-insoluble complex is made possible by specifically adjusting the pH to a high value where both components are not soluble anymore but precipitate as a water-soluble complex.
  • the pH is adapted to a value of at least 6, in the examples it is adapted to values around 7.
  • the water-soluble complex which precipitates forms particles in the solution and these particles are then deposited on the substrate.
  • the ink recording sheets therefore comprise a layer of these particulate water-insoluble complexes on the substrate.
  • US 7704574 discloses a coated substrate suitable for ink-jet printing comprising several coating layers.
  • the printable substrate comprises, on at least one side, an essentially unpigmented sizing layer, which forms the ink receiving layer, i.e. which is in direct contact with one surface of a raw cellulosic or lignocellulosic substrate layer, and which on the opposite side forms the surface of the printable substrate for receiving the ink.
  • sizing layer essentially consists of a combination of a cationic inorganic polyaluminium hydroxychloride compound with at least one organic cationic polydimethylammonium compound.
  • This sizing formulation is applied as an aqueous formulation at a pH of less than 6 in which the cationic inorganic polyaluminium hydroxychloride is in solution and the cationic polydimethylammonium compound is in dispersion.
  • the cationic inorganic aluminium hydroxychloride is present in solution as a cationic inorganic polyaluminium hydroxychloride in combination with the dispersion of cationic polydimethylammonium compound at this low pH leads to a final dried sizing layer with improved general properties and in particular printing properties.
  • a corresponding printable substrate showed high water fastness, exceptionally high optical densities for a large number of different printer devices and excellent colour gamut as well as sufficient drop spreading in 100% black areas.
  • the sizing layer essentially consists of the above-mentioned constituents.
  • the sizing layer is completely free from additional compounds such as binders, pigments, brighteners.
  • Certain processing aids such as rheology modifiers, defoamers etc. may be present, however only in very minor proportion, typically below 5 weight percent, preferably below 2 weight percent. In principle such processing aids can also be completely absent.
  • the cationic inorganic polyaluminium hydroxychloride is applied as a solution of polymeric (Al 2 (OH) 5 Cl.2.5H 2 O).
  • the organic cationic polydimethylammonium compound is selected from the group of polydadmac, N,N-Dimethyl-1,3-Propanediamine polymer with epichlorhydrin, or mixtures thereof.
  • the organic cationic polydimethylammonium is selected as a N,N-Dimethyl-1,3-Propanediamine polymer with epichlorhydrin, preferably with a molecular weight in the range of 50,000-80,000 g/mol.
  • the dry weight ratio of the cationic inorganic polyaluminium hydroxychloride to the organic cationic polydimethylammonium compound is in the range of 0.25 - 4. Preferably it is in the range of 0.5 - 2, or 0.75 - 1.5, most preferably this ratio is in the range of 1.
  • the raw cellulosic substrate comprises at least 5 weight percent of filler, preferably at least 10 or at least 15 weight percent of filler. Preferably up to 30% or up to 20% filler are present.
  • the filler is preferably a fine particulate pigment filler, preferentially it is a calcium carbonate filler, more preferably precipitated calcium carbonate filler.
  • the corresponding cellulosic constituent of the raw substrate is preferentially softwood and/or Eucalyptus based pulp.
  • the pH of the aqueous formulation is less than 6.
  • the aqueous fonnulation has an even lower pH, namely preferentially a pH of less than 5.5, more preferably of less than 5.3, typically in the range of 4.5-5.5.
  • the dry weight ratio of the cationic inorganic polyaluminium hydroxychloride to the N,N-Dimethyl-1,3-Propanediamine polymer with epichlorhydrin is in the range of 0.5 - 2, preferably in the range of 1, and is applied at a pH in the range of 4.5-5.5, typically around 5.
  • the sizing layer is applied at a dry weight in the range of 1-4 g/m 2 , preferably in the range of 1-2 g/m 2 .
  • the total weight of the inkjet printable substrate (inclusive of the sizing layer(s) is in the range 40-150 g/m 2 , preferably 50 - 130 g/m 2 .
  • the sizing layer can be applied on one single side of the raw cellulosic substrates, preferably it is however applied on both sides of the raw cellulosic substrate.
  • the sizing is applied online, so within the paper machine and subsequent to the actual formation of the web.
  • the web Prior to the sizing step, the web can be only partially dried, preferably to a residual humidity in the range of 1 - 10%, preferably 2-5%, more preferably 3-4%.
  • the sizing layer is applied on both sides using a size press, in which the web is, in an online process, passed through a pair of rolls which deliver the sizing formulation in the desired amount.
  • an essentially untreated raw cellulosic substrate web is coated or impregnated with a sizing formulation essentially consisting of a combination of a cationic inorganic polyaluminium hydroxychloride compound with at least one organic cationic polydimethylammonium compound, preferably with one single organic cationic polydimethylammonium compound and this under conditions such that the sizing formulation is present as an aqueous formulation at a pH of less than 6 in which the cationic inorganic polyaluminium hydroxychloride is in solution and the cationic polydimethylammonium compound is in dispersion.
  • the total solids content in the sizing formulation is in the range of 5-30%, preferably in the range of 10 - 20 % or 12-15%.
  • the sizing formulation on-line and essentially immediately subsequent to the process of the making of the raw cellulosic substrate web (optionally after partial drying) and for the sizing the web is passed through a size press. Further embodiments of the invention are laid down in the dependent claims.
  • C1 and C3 are comparative examples while C7, C10 and C11 are examples according to the invention.
  • Table 1 Sizing formulations, wherein the following definitions are applicable: SC: solids content (as actually analysed in the starting material); contents are given as parts in dry weight in the final coating formulation which had a total solids content adjusted in the range of 12-15 % w/w. SC (%) Formulation C1 Formulation C3 Formulation C7 Formulation C10 Formulation C11 Cartafix DPR 23,8 100 50 25 75 Cartafix LA 42,3 100 50 75 25
  • Cartafix DPR is an aqueous dispersion (> 23% w/w) of a high charge density polyamine/epichlorohydrin-based cationic; main ingredient 1,3-Propanediamine, N,N-dimethyl-, polymer with (chloromethyl)oxirane; Density (20°C) 1.06 kg/l; pH (as supplied) 4.5.
  • Cartafix LA is an aqueous solution (> 40% w/w) of polymeric highly basic aluminium hydroxyl chloride, chemically indicated as Al 2 (OH) 5 Cl.2-3H 2 O; its cationic charge density is about 4-5 times higher than that of aluminium sulphate; Density (20°C) 1,33 kg/l; pH (1% solution) 4.5.
  • an uncoated raw base paper (83 g/m 2 ) which was based on standard softwood kraft pulp (45-50%) and standard Eucalyptus kraft pulp (50-45%).
  • the pulp mixture as such was additionally provided with 18.5 % w/w of a commercially available PCC, with scalenohedral particle size, a mean particle diameter 1.8 ⁇ 0.2 ⁇ m, 57 ⁇ 5% particles ⁇ 2 ⁇ m, a BET specific surface area 5.5 ⁇ 1 m2/g and a Tappi (R 457, ISO 2469) brightness 94.5 ⁇ 1%.
  • the raw base substrate was surface sized on one side by means of a hand sheet rod coater device wherein approximately 1.5 g/m 2 sizing material was applied as to all papers C1, C3, C10 and C11. As to paper C7 the amount of sizing material was also varied to respectively 0.7 g/m 2 , 1.4 g/m 2 , 1.6 g/m 2 , 2.8 g/ M 2 and 3.6 glm 2 . In practice varying application amounts were provided for via appropriate aqueous dilution of the mixture of Cartafix DPR and Cartafix LA. The sizing layer was dried using conventional infrared drying techniques.
  • the final moisture was in the range of 4.5-5.5%.
  • the final grammage (area weight) of the uncoated paper was in the range of 85 g/m 2 . No calendaring was being applied.
  • an uncoated raw base paper (83 g/m 2 ) which was based on standard softwood kraft pulp (45-50%) and standard Eucalyptus kraft pulp (50-45%).
  • the pulp mixture as such was additionally provided with 18.5 % w/w of a commercially available PCC, with scalenohedral particle size, a mean particle diameter 1.8 ⁇ 0.2 ⁇ m, 57 ⁇ 5% particles ⁇ 2 ⁇ m, a BET specific surface area 5.5 ⁇ 1 m2/g and a Tappi (R 457, ISO 2469) brightness 94.5 ⁇ 1 %.
  • the raw base substrate was surface sized on both sides by means of a metered size press and varying amounts sizing material (1.2 - 3.6 g/m 2 /side) were applied to the raw base paper. In practice varying application amounts were provided for via appropriate aqueous dilution of the mixture of Cartafix DPR and Cartafix LA.
  • the sizing layer was dried using conventional infrared drying techniques.
  • the final moisture was in the range of 3.6-4.5%.
  • the final grammage (area weight) of the uncoated paper was in the range of approximately 85 - 90 glm 2 . No calendaring was being applied.
  • the resulting uncoated paper products were full-color printed on high-speed ink-jet press Oce Jetstream 2200.
  • the resulting uncoated paper products were full-color printed on high-speed ink jet press Kodak VL2000.

Landscapes

  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Paper (AREA)
  • Ink Jet (AREA)

Claims (13)

  1. Tintenstrahlbedruckbares Substrat (1) mit einer im Wesentlichen unpigmentierten Leimungsschicht (3) auf mindestens einer Oberfläche eines Substrats aus Rohzellulose oder Lignozellulose (2), wobei die Leimungsschicht (3) im Wesentlichen aus einer Kombination einer kationischen anorganischen Polyaluminiumhydroxychlorid-Verbindung mit mindestens einer organischen kationischen Polydimethylammonium-Verbindung besteht, aufgebracht als eine wässrige Formulierung mit einem pH-Wert von kleiner als 6, in der das Polyaluminiumhydroxychlorid gelöst und die kationische Polydimethylammonium-Verbindung dispergiert vorliegt.
  2. Tintenstrahlbedruckbares Substrat (1) nach Anspruch 1, wobei die Leimungsschicht (3) vollkommen frei von zusätzlichen Verbindungen, wie z.B. Bindemitteln, Pigmenten, Aufhellern, ist.
  3. Tintenstrahlbedruckbares Substrat (1) nach einem der vorhergehenden Ansprüche, wobei das kationische anorganische Polyaluminiumhydroxychlorid als eine Lösung von polymerem (Al2(OH)5Cl.2,5H2O) aufgebracht ist.
  4. Tintenstrahlbedruckbares Substrat (1) nach einem der vorhergehenden Ansprüche, wobei die organische kationische Polydimethylammonium-Verbindung aus der Gruppe von Polydadmac, N,N-Dimethyl-1,3-propandiamin-Polymer mit Epichlorhydrin oder Gemischen dieser ausgewählt ist, wobei vorzugsweise N,N-Dimethyl-1,3-propandiamin-Polymer mit Epichlorhydrin mit einem Molekulargewicht im Bereich von 40.000 bis 80.000 g/mol benutzt wird.
  5. Tintenstrahlbedruckbares Substrat (1) nach einem der vorhergehenden Ansprüche, wobei das Trockengewichtsverhältnis des Polyaluminiumhydroxychlorids zu der organischen kationischen Polydimethylammonium-Verbindung im Bereich von 0,25 bis 4, vorzugsweise im Bereich von 0,5 bis 2 oder 0,75 bis 1,5, am stärksten bevorzugt im Bereich von 1 ist.
  6. Tintenstrahlbedruckbares Substrat (1) nach einem der vorhergehenden Ansprüche, wobei das Substrat aus Rohzellulose (2) mindestens 5 Gewichtsprozent Füllstoff, vorzugsweise mindestens 10 oder mindestens 15 Gewichtsprozent Füllstoff umfasst, wobei der Füllstoff ein Calciumcarbonat-Füllstoff, vorzugsweise gefällter Calciumcarbonat-Füllstoff ist.
  7. Tintenstrahlbedruckbares Substrat (1) nach einem der vorhergehenden Ansprüche, wobei die wässrige Formulierung einen pH-Wert von kleiner als 5,5, vorzugsweise von kleiner als 5,3, stärker bevorzugt im Bereich von 4,5 bis 5,3 aufweist.
  8. Tintenstrahlbedruckbares Substrat (1) nach einem der vorhergehenden Ansprüche, wobei eine einzelne organische kationische Polydimethylammonium-Verbindung vorhanden ist und N,N-Dimethyl-1,3-propandiamin-Polymer mit Epichlorhydrin als diese ausgewählt ist, wobei das kationische anorganische Polyaluminiumhydroxychlorid als eine Lösung von polymerem (Al2(OH)5Cl.2,5H2O) aufgebracht ist und wobei das Trockengewichtsverhältnis des Polyaluminiumhydroxychlorids zu dem N,N-Dimethyl-1,3-propandiamin-Polymer mit Epichlorhydrin im Bereich von 0,5 bis 2 ist und mit einem pH-Wert im Bereich von 4,5 bis 5,5 aufgebracht ist.
  9. Tintenstrahlbedruckbares Substrat (1) nach einem der vorhergehenden Ansprüche, wobei die Leimungsschicht (3) mit einem Trockengewicht im Bereich von 1 bis 4 g/m2, vorzugsweise im Bereich von 1 bis 2 g/m2 aufgebracht ist, wobei die Leimungsschicht vorzugsweise auf beiden Seiten des Substrats aus Rohzellulose (2) aufgebracht ist.
  10. Tintenstrahlbedruckbares Substrat (1) nach einem der vorhergehenden Ansprüche, wobei das Gesamtgewicht des tintenstrahlbedruckbaren Substrats einschließlich der Leimungsschicht(en) im Bereich von 40 bis 150 g/m2, vorzugsweise von 50 bis 130 g/m2 ist.
  11. Verfahren zum Herstellen eines tintenstrahlbedruckbaren Substrats (1) nach einem der vorhergehenden Ansprüche, wobei eine im Wesentlichen unbehandelte Substratbahn aus Rohzellulose (2) mit einer Leimungsformulierung beschichtet wird, die im Wesentlichen aus einer Kombination einer kationischen anorganischen Polyaluminiumhydroxychlorid-Verbindung mit mindestens einer organischen kationischen Polydimethylammonium-Verbindung besteht, die als eine wässrige Formulierung mit einem pH-Wert von kleiner als 6 aufgebracht wird, in der das Polyaluminiumhydroxychlorid gelöst und die kationische Polydimethylammonium-Verbindung dispergiert vorliegt.
  12. Verfahren nach Anspruch 11, wobei der Gesamtfeststoffanteil in der Leimungsformulierung im Bereich von 5 bis 30 %, vorzugsweise im Bereich von 10 bis 20 % ist.
  13. Verfahren nach einem der vorhergehenden Ansprüche 11 und 12, wobei die Bahn, mit dem Prozess des Herstellens der Substratbahn aus Rohzellulose verbunden und diesem nachfolgend, zum Leimen der Bahn durch eine Leimpresse geführt wird.
EP20100165096 2010-06-07 2010-06-07 Substrat für den Tintenstrahldruck Active EP2392467B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20100165096 EP2392467B1 (de) 2010-06-07 2010-06-07 Substrat für den Tintenstrahldruck

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EP2392467B1 true EP2392467B1 (de) 2014-03-05

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Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9120564D0 (en) 1991-09-27 1991-11-06 Sandoz Ltd Improvements in and relating to organic compounds
US20040033377A1 (en) * 2002-06-10 2004-02-19 Koenig Michael F. Waterfast dye fixative compositions for ink jet recording sheets
JP2005280338A (ja) * 2004-03-04 2005-10-13 Oji Paper Co Ltd インクジェット記録用紙
FI120510B (sv) 2004-12-23 2009-11-13 M Real Oyj Tryckpapper och förfarande för framställning därav
US7374800B2 (en) 2005-02-09 2008-05-20 Burch Eric L print media for ink-jet applications having improved image quality
US7651748B2 (en) * 2005-10-25 2010-01-26 Isp Investments Inc. Coating compositions for forming inkjet-receptive coatings on a substrate
US20110003097A1 (en) 2008-01-31 2011-01-06 Tienteh Chen High quality porous ink-jet media

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