EP1044822A1 - Decorative base paper with ink jet ink accepting layer - Google Patents

Decorative base paper with ink jet ink accepting layer Download PDF

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Publication number
EP1044822A1
EP1044822A1 EP00107212A EP00107212A EP1044822A1 EP 1044822 A1 EP1044822 A1 EP 1044822A1 EP 00107212 A EP00107212 A EP 00107212A EP 00107212 A EP00107212 A EP 00107212A EP 1044822 A1 EP1044822 A1 EP 1044822A1
Authority
EP
European Patent Office
Prior art keywords
decorative base
base paper
weight
ink
paper
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
EP00107212A
Other languages
German (de)
French (fr)
Other versions
EP1044822B1 (en
Inventor
Hartmut Dr. Schulz
Rainer Dr. Gumbiowski
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.)
Technocell Dekor GmbH and Co KG
Original Assignee
Technocell Dekor GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Technocell Dekor GmbH and Co KG filed Critical Technocell Dekor GmbH and Co KG
Publication of EP1044822A1 publication Critical patent/EP1044822A1/en
Application granted granted Critical
Publication of EP1044822B1 publication Critical patent/EP1044822B1/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
    • 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
    • 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
    • B44C5/0446—Ornamental plaques, e.g. decorative panels, decorative veneers bearing graphical information
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/18—Paper- or board-based structures for surface covering
    • D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
    • D21H27/26—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures
    • 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
    • B41M5/50—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
    • 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
    • B41M5/5254—Macromolecular coatings characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
    • D21H11/04—Kraft or sulfate pulp
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/47—Condensation polymers of aldehydes or ketones
    • D21H17/49—Condensation polymers of aldehydes or ketones with compounds containing hydrogen bound to nitrogen
    • D21H17/51—Triazines, e.g. melamine
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/675—Oxides, hydroxides or carbonates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24893—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
    • Y10T428/24901—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material including coloring matter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/269—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension including synthetic resin or polymer layer or component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31859—Next to an aldehyde or ketone condensation product
    • Y10T428/31862—Melamine-aldehyde
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31859—Next to an aldehyde or ketone condensation product
    • Y10T428/3187—Amide-aldehyde
    • Y10T428/31873—Urea or modified urea-aldehyde
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31859—Next to an aldehyde or ketone condensation product
    • Y10T428/31877—Phenol-aldehyde
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/3188—Next to cellulosic
    • Y10T428/31895—Paper or wood

Definitions

  • the invention relates to ink jet processes printable decorative base papers or pre-impregnated Decorative base papers for decorative coating materials, especially a film base paper and a Printing base paper.
  • Decorative base papers are used for the production of decorative Laminated materials, decorative films and pre-impregnates needed.
  • Decorative coating materials become Surface coating in furniture manufacturing and in Interior fittings used.
  • Decorative base papers are required for different areas of application in different basis weights. Edged decorative base papers have an average weight per unit area of 200 g / m 2 . In contrast, the basis weight of decorative base papers for surface finishing is in the range from 20 to 200 g / m 2 . Overlay papers with a basis weight of 15 to 40 g / m 2 are required. They serve as cover material for combined laminates made of overlay paper, decorative paper, barrier paper and fiberboard.
  • the decorative base paper is already impregnated during production in the paper machine. After printing, the printed surface is varnished and the back of the pre-impregnate is glued to a base.
  • the pre-impregnate has a basis weight of 20 to 100 g / m 2 .
  • the invention is based on the object to equip decorative base paper in such a way that it can be processed using the ink jet printing process with good printing properties such as low color consumption as well as good image sharpness and high Color density is printable.
  • Coating materials the basis of decorative base papers on which a Ink receiving layer is formed are in particular foil base papers or printing base papers.
  • Foil base papers are therefore pre-impregnated Decorative base papers with an ink absorption layer.
  • Print base papers according to the invention are not impregnated decorative base papers with a Ink receiving layer.
  • Decorative base papers differ in their properties fundamentally of normal ink jet papers that are used for Production of color prints, graphics and photo-like Printouts can be used. These papers have one closed surface covered by a synthetic resin or Cast coating is achieved. After applying the The ink-receiving layer is clearly separated between carrier and coating.
  • decorative base papers have an open one Surface so that the decorative base paper with the Impregnation resin can be soaked quickly and evenly can.
  • Conventional decorative base papers are therefore for the Coating with ink-receiving layers not suitable, because the formation of an evenly thick Ink receiving layer on the surface of a Decorative base paper is impossible.
  • Decorative base paper is a decorative base paper that is smooth on one side pre-impregnated before printing and on the smooth Side is coated with an ink receiving layer.
  • the one-sided smooth decorative base paper is preferably on a Yankee paper machine, the Four wire side of the paper web with the help of a heated Cylinder is smoothed. Due to the long contact time of the Paper with the cylinder can protect against moisture resistant smooth surface can be created.
  • the Pre-impregnation takes place in the paper machine, the amount of the impregnating agent being from 5 to 30% by weight, based on the mass of paper.
  • the decorative base papers used in accordance with another embodiment of the invention are decorative base papers smoothed in a soft calender.
  • the ink-receiving layer is applied on a smoothed side.
  • Suitable impregnating agents are the impregnating resins usually used in this technical field, in particular melamine-formaldehyde resin, urea-formaldehyde resin, phenol-formaldehyde resin, uric acid-acrylic acid ester copolymer or polyvinyl alcohol.
  • the air permeability of the one side of smooth decorative base paper according to Gurley 3 to 20 Seconds.
  • the smoothness after Bekk must not be higher than 50 Bekk seconds.
  • the air permeability of a with a soft calender smoothed decorative base paper is 20 to 40 Gurley seconds, especially 30 to 40 Gurley seconds.
  • the smoothness of this base paper is at least 50 Bekk seconds.
  • the weight per unit area of the decorative base paper according to the invention is in the range from 15 to 400 g / m 2 and is, for example, 15 to 40 g / m 2 or 20 to 200 g / m 2 .
  • the basis weights are selected depending on the particular application.
  • softwood pulp long fiber pulp
  • Hardwood pulp short fiber pulp
  • a mixture of softwood / hardwood pulp is preferred in the ratio 10:90 to 90:10.
  • a mixture of softwood / hardwood pulp is particularly preferred in a ratio of 30:70 to 70:30.
  • the Pulp can have a freeness of 20 ° to 60 ° SR Show Schopper-Riegler.
  • a pigment such as titanium dioxide or opacity Calcium carbonate added.
  • the percentage of pigment based on the weight of the pulp can be 10 to 40 % By weight.
  • Decorative base paper To the pulp suspension used to manufacture the Decorative base paper can also be used Wet strength agents such as polyamide / polyamine-epichlorohydrin resin, cationic polyacrylates, modified melamine-formaldehyde resin or cationized starches added become. Likewise, the addition of retention aids and dyes possible.
  • Sheet formation can be done on Yankee paper machines or Foudrinier paper machines.
  • Ink receiving layer All known ones can be used for the ink receiving layer Receiving layers are used. This is what it is about are mostly hydrophilic coatings that water-soluble or water-dispersible polymers contain, for example polyvinyl alcohol, cationic Polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl acetate, Starch, gelatin, casein or carboxymethyl cellulose.
  • the Ink receiving layer can additionally pigments and cationic substances for fixing the ink dyes contain. Suitable according to the invention Ink receiving layers are used in the German patents 43 22 179 and 43 22 178 and in the German Patent applications 196 04 693 and 196 18 607 are described, the disclosure of which is incorporated herein by reference. Pigment-containing ink-receiving layers are preferred.
  • the application weight of the ink receiving layer is 2 to 20 g / m 2 , in particular 5 to 15 g / m 2 .
  • the ink absorption layer can be applied using the usual application methods such as roller application, engraving or nipping methods and air brush or roller doctor metering.
  • a mixture of 90% by weight hardwood sulfate pulp and 10% by weight softwood sulfate pulp was ground at a consistency of 4% to a freeness of 42 ° SR. Subsequently, 5% by weight of melamine-formaldehyde resin and 15% by weight of titanium dioxide (rutile form) were added (weight details of the additives relate to the pulp).
  • An edged decorative base paper with a basis weight of 200 g / m 2 and a thickness of 300 ⁇ m was produced from this mixture. The paper had a smoothness of 33 Bekk seconds and an air permeability of 7 Gurley seconds.
  • the raw paper obtained was with a Ink receiving layer coated and by means of ink-jet process printed.
  • a decorative base paper for surface finishing with a basis weight of 100 g / m 2 and a thickness of 120 ⁇ m was produced from this mixture.
  • the paper had a smoothness of 35 Bekk seconds and an air permeability of 8 Gurley seconds.
  • the decorative base paper obtained was with a Ink receiving layer provided and by means of ink-jet process printed.
  • a mixture of 20% by weight hardwood sulfate pulp and 80% by weight softwood sulfate pulp was ground at a consistency of 4% to a freeness of 45 ° SR. Subsequently, 4% by weight of polyamide / polyamine-epichlorohydrin resin, 15% by weight of Al 2 O 3 and 0.2% by weight of a sodium salt of a polycarboxylic acid were added as retention aids (weight details of the additives relate to the pulp).
  • An overlay paper with a basis weight of 28 g / m 2 and a thickness of 32 ⁇ m was produced from this mixture. The paper had an air permeability of ⁇ 5 Gurley seconds (5-sheet stack measurement).
  • the decorative base paper obtained was with a Ink receiving layer provided and by means of ink-jet process printed.
  • a mixture of 50% by weight hardwood sulfate pulp and 50% by weight softwood sulfate pulp was ground at a consistency of 4% to a freeness of 42 ° SR. Subsequently, 5% by weight of polyamide / polyamine-epichlorohydrin resin and 20% by weight of titanium dioxide (rutile form) were added (the weight of the additives relates to the pulp). With the help of a Yankee paper machine, this mixture was used to produce a decorative base paper which was smooth on one side and had a smoothness of 30 Bekk seconds and an air permeability of 7 Gurley seconds.
  • a pre-impregnate with a basis weight of 80 g / m 2 and a thickness of 80 ⁇ m was produced by impregnation with a urea acrylate.
  • the application weight of the impregnating agent was 20 g / m 2 .
  • the prepreg obtained was treated with a Ink receiving layer provided and by means of ink-jet process printed.
  • a mixture of 50% by weight hardwood sulfate pulp and 50% by weight softwood sulfate pulp was ground at a consistency of 4% to a freeness of 50 ° SR. 30% by weight of CaCO 3 , 0.60% by weight of cationic starch, 0.10% by weight of cationic polyacrylamide, 0.25% by weight of polyamide / polyamine-epichlorohydrin resin and 0.30% by weight of alkyl ketene dimer ( Quantities based on the pulp) added and a 100 g / m 2 raw paper is made from it, which was then coated with oxidized starch with an application weight of 1 g / m 2 (so-called film base paper).
  • the uncoated base paper had a smoothness of 33 Bekk seconds and an air permeability of 10 Gurley seconds.
  • the film base paper obtained was with a Ink receiving layer provided and by means of ink-jet process printed.
  • a comparative example V1 was a commercially available decorative base paper from Technocell® Dekor GmbH with a weight per unit area of 150 g / m 2 and a thickness of 190 ⁇ m.
  • the paper had a smoothness of 67 Bekk seconds and an air permeability of 22 Gurley seconds.
  • the paper was printed using conventional gravure printing.
  • the ink-receiving layer used in the examples has the following composition: Polyvinyl alcohol, 20% aqueous solution 33 parts by weight Polyacrylamide, 20% aqueous solution 9 parts by weight Acrylic acid ester polymer, 20% dispersion 10 parts by weight Amorphous silicon dioxide, 20% dispersion 48 parts by weight
  • the papers of the invention were with a Inkjet printer HP Deskjet® 550C from Hewlett Packard printed in color. On the printed papers the color densities and sharpness were checked. The Results are shown in Table 2.
  • the color density was measured with a Gretag densitometer on the colors cyan, magenta, yellow and black in incident light.

Landscapes

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

Abstract

A decorative paper (I) for the decorative coating of materials, contains an ink absorbent layer.

Description

Die Erfindung betrifft mittels Ink-Jet-Verfahren bedruckbare Dekorrohpapiere oder vorimprägnierte Dekorrohpapiere für dekorative Beschichtungswerkstoffe, insbesondere ein Folienbasispapier und ein Druckbasispapier.The invention relates to ink jet processes printable decorative base papers or pre-impregnated Decorative base papers for decorative coating materials, especially a film base paper and a Printing base paper.

Dekorrohpapiere werden zur Herstellung von dekorativen Schichtpreßstoffen, Dekorfolien und Vorimprägnaten benötigt. Dekorative Beschichtungswerkstoffe werden zur Oberflächenbeschichtung bei der Möbelherstellung und im Innenausbau verwendet.Decorative base papers are used for the production of decorative Laminated materials, decorative films and pre-impregnates needed. Decorative coating materials become Surface coating in furniture manufacturing and in Interior fittings used.

Dekorrohpapiere werden für die unterschiedlichen Anwendungsgebiete in verschiedenen Flächengewichten benötigt. Kanten-Dekorrohpapiere haben ein mittleres Flächengewicht von 200 g/m2. Das Flächengewicht von Dekorrohpapieren für die Flächenveredelung liegt demgegenüber im Bereich von 20 bis 200 g/m2. Overlay-Papiere werden mit einem Flächengewicht von 15 bis 40 g/m2 benötigt. Sie dienen als Deckmaterial bei kombinierten Laminaten aus Overlay-Papier, Dekorpapier, Barrierepapier und Faserplatte.Decorative base papers are required for different areas of application in different basis weights. Edged decorative base papers have an average weight per unit area of 200 g / m 2 . In contrast, the basis weight of decorative base papers for surface finishing is in the range from 20 to 200 g / m 2 . Overlay papers with a basis weight of 15 to 40 g / m 2 are required. They serve as cover material for combined laminates made of overlay paper, decorative paper, barrier paper and fiberboard.

Herkömmliche Folienrohpapiere oder Vorimprägnate werden mit dem gewünschten Muster bedruckt, mit einem Acrylat/Harnstoffpolymer imprägniert und anschließend mit einer Unterlage verklebt. Das Aufbringen des Druckmusters erfolgt im Tiefdruckverfahren. Dadurch kommt es zu einem hohen Farbverbrauch und oftmals zu einer mangelhaften Bildschärfe durch fehlende Bildpunkte (missing dots). Die Herstellung geringer Mengen des bedruckten Materials ist sehr aufwendig und teuer.Conventional film base paper or pre-impregnated printed with the desired pattern, with a Impregnated acrylate / urea polymer and then with glued to a pad. Applying the print pattern takes place in the gravure printing process. This leads to one high ink consumption and often poor Sharpness due to missing dots. The Production of small quantities of the printed material is very complex and expensive.

Bei einem Vorimprägnat erfolgt eine Imprägnierung des Dekorrohpapiers bereits bei der Herstellung in der Papiermaschine. Nach dem Bedrucken wird die bedruckte Oberfläche lackiert und die Rückseite des Vorimprägnats mit einer Unterlage verklebt. Das Vorimprägnat hat ein Flächengewicht von 20 bis 100 g/m2.In the case of a pre-impregnate, the decorative base paper is already impregnated during production in the paper machine. After printing, the printed surface is varnished and the back of the pre-impregnate is glued to a base. The pre-impregnate has a basis weight of 20 to 100 g / m 2 .

Eine spezielle Form des Folienrohpapiers ist das in der DE 195 03 745 C1 beschriebene Folienrohpapier, das bevorzugt zur Beschichtung von Spielbrettern eingesetzt wird.This is a special form of film base paper in the Film base paper described in DE 195 03 745 C1, the preferably used for coating game boards becomes.

Das Ink-Jet-Druckverfahren ist seit Anfang der achtziger Jahre bekannt. Obwohl fotoähnliche Drucke mit dieser Technologie seit Ende der achtziger Jahre möglich sind, wird zur Bedruckung von Dekorrohpapieren nach wie vor das eingangs erwähnte Tiefdruckverfahren eingesetzt.Ink jet printing has been around since the early 1980s Years known. Although photo-like prints with this one Technology since the late eighties have been possible is still used for printing on decorative base papers intaglio printing method mentioned at the beginning.

Der Erfindung liegt die Aufgabe zugrunde, ein Dekorrohpapier derart auszurüsten, das es durch das Ink-Jet-Druckverfahren bei guten Druckeigenschaften wie geringer Farbverbrauch sowie guter Bildschärfe und hoher Farbdichte bedruckbar ist.The invention is based on the object To equip decorative base paper in such a way that it can be processed using the ink jet printing process with good printing properties such as low color consumption as well as good image sharpness and high Color density is printable.

Gelöst wird die Aufgabe durch Beschichtungswerkstoffe auf der Basis von Dekorrohpapieren, auf denen eine Tintenaufnahmeschicht ausgebildet ist. Solche Beschichtungswerkstoffe auf der Basis von Dekorrohpapieren sind insbesondere Folienbasispapiere oder Druckbasispapiere. Erfindungsgemäße Folienbasispapiere sind also vorimprägnierte Dekorrohpapiere mit einer Tintenaufnahmeschicht. The task is solved by coating materials the basis of decorative base papers on which a Ink receiving layer is formed. Such Coating materials based on Decorative base papers are in particular foil base papers or printing base papers. According to the invention Foil base papers are therefore pre-impregnated Decorative base papers with an ink absorption layer.

Erfindungsgemäße Druckbasispapiere sind nicht imprägnierte Dekorrohpapiere mit einer Tintenaufnahmeschicht.Print base papers according to the invention are not impregnated decorative base papers with a Ink receiving layer.

Dekorrohpapiere unterscheiden sich in ihren Eigenschaften grundlegend von normalen Ink-Jet-Papieren, die zur Herstellung von Farbdrucken, Graphiken und fotoähnlichen Ausdrucken verwendet werden. Diese Papiere besitzen eine geschlossene Oberfläche, die durch eine Kunstharz- oder Gießbeschichtung erzielt wird. Nach dem Auftragen der Tintenaufnahmeschicht besteht eine klare Trennung zwischen Träger und Beschichtung.Decorative base papers differ in their properties fundamentally of normal ink jet papers that are used for Production of color prints, graphics and photo-like Printouts can be used. These papers have one closed surface covered by a synthetic resin or Cast coating is achieved. After applying the The ink-receiving layer is clearly separated between carrier and coating.

Dekorrohpapiere weisen demgegenüber eine offene Oberfläche auf, damit das Dekorrohpapier mit dem Imprägnierharz schnell und gleichmäßig durchtränkt werden kann. Herkömmliche Dekorrohpapiere sind deshalb für die Beschichtung mit Tintenaufnahmeschichten nicht geeignet, weil die Ausbildung einer gleichmäßig dicken Tintenaufnahmeschicht auf der Oberfläche eines Dekorrohpapiers unmöglich ist.In contrast, decorative base papers have an open one Surface so that the decorative base paper with the Impregnation resin can be soaked quickly and evenly can. Conventional decorative base papers are therefore for the Coating with ink-receiving layers not suitable, because the formation of an evenly thick Ink receiving layer on the surface of a Decorative base paper is impossible.

Gemäß einer Ausführungsform der Erfindung ist das Dekorrohpapier ein einseitig glattes Dekorrohpapier, das vor dem Bedrucken vorimprägniert und auf der glatten Seite mit einer Tintenaufnahmeschicht beschichtet wird. Das einseitig glatte Dekorrohpapier wird vorzugsweise auf einer Yankee-Papiermaschine hergestellt, wobei die Langsiebseite der Papierbahn mit Hilfe eines beheizten Zylinders geglättet wird. Durch die lange Kontaktzeit des Papiers mit dem Zylinder kann eine gegen Feuchte resistente glatte Oberfläche erzeugt werden. Die Vorimprägnierung findet in der Papiermaschine statt, wobei die Menge des Imprägniermittels von 5 bis 30 Gew.%, bezogen auf die Papiermasse, betragen kann. According to one embodiment of the invention Decorative base paper is a decorative base paper that is smooth on one side pre-impregnated before printing and on the smooth Side is coated with an ink receiving layer. The one-sided smooth decorative base paper is preferably on a Yankee paper machine, the Four wire side of the paper web with the help of a heated Cylinder is smoothed. Due to the long contact time of the Paper with the cylinder can protect against moisture resistant smooth surface can be created. The Pre-impregnation takes place in the paper machine, the amount of the impregnating agent being from 5 to 30% by weight, based on the mass of paper.

Die erfindungsgemäß verwendeten Dekorrohpapiere gemäß einer anderen Ausführungsform der Erfindung sind in einem Soft-Kalander geglättete Dekorrohpapiere. Die Tintenaufnahmeschicht wird auf einer geglätteten Seite aufgetragen.
Geeignete Imprägniermittel sind die üblicherweise auf diesem technischen Gebiet eingesetzten Tränkharze, insbesondere Melamin-Formaldehyd-Harz, Harnstoff-Formaldehyd-Harz, Phenol-Formaldehyd-Harz, Harnsäure-Acrylsäureester-Copolymer oder Polyvinylalkohol.The decorative base papers used in accordance with another embodiment of the invention are decorative base papers smoothed in a soft calender. The ink-receiving layer is applied on a smoothed side.
Suitable impregnating agents are the impregnating resins usually used in this technical field, in particular melamine-formaldehyde resin, urea-formaldehyde resin, phenol-formaldehyde resin, uric acid-acrylic acid ester copolymer or polyvinyl alcohol.

Um eine ausreichende Harzaufnahme zu erreichen und gleichzeitig ein Absinken der Tintenaufnahmeschicht in das Papier zu verhindern, muß die Luftdurchlässigkeit des einseitig glatten Dekorrohpapiers nach Gurley 3 bis 20 Sekunden betragen. Die Glätte nach Bekk darf nicht höher als 50 Bekk Sekunden sein. Die Luftdurchlässigkeit eines mit einem Soft-Kalander geglätteten Dekorrohpapiers beträgt 20 bis 40 Gurley Sekunden, insbesondere 30 bis 40 Gurley Sekunden. Die Glätte dieses Rohpapiers beträgt mindestens 50 Bekk Sekunden.To achieve sufficient resin absorption and at the same time a sinking of the ink receiving layer in To prevent the paper, the air permeability of the one side of smooth decorative base paper according to Gurley 3 to 20 Seconds. The smoothness after Bekk must not be higher than 50 Bekk seconds. The air permeability of a with a soft calender smoothed decorative base paper is 20 to 40 Gurley seconds, especially 30 to 40 Gurley seconds. The smoothness of this base paper is at least 50 Bekk seconds.

Das Flächengewicht des erfindungsgemäßen Dekorrohpapiers liegt im Bereich von 15 bis 400 g/m2 und beträgt beispielsweise 15 bis 40 g/m2 oder 20 bis 200 g/m2. Die Flächengewichte werden in Abhängigkeit vom besonderen Verwendungszweck gewählt.The weight per unit area of the decorative base paper according to the invention is in the range from 15 to 400 g / m 2 and is, for example, 15 to 40 g / m 2 or 20 to 200 g / m 2 . The basis weights are selected depending on the particular application.

Zur Herstellung dieser unterschiedlichen Dekorrohpapiere können Nadelholz-Zellstoffe (Langfaser-Zellstoffe) oder Laubholz-Zellstoffe (Kurzfaser-Zellstoffe) verwendet werden. Bevorzugt wird eine Mischung aus Nadelholz/Laubholz-Zellstoffen im Verhältnis 10:90 bis 90:10. Besonders bevorzugt wird eine Mischung aus Nadelholz/Laubholz-Zellstoffen im Verhältnis 30:70 bis 70:30. Der Zellstoff kann einen Mahlgrad von 20° bis 60° SR nach Schopper-Riegler aufweisen. Zur Erzielung einer hohen Opazität kann ein Pigment wie Titandioxid oder Calciumcarbonat zugegeben. Der Anteil des Pigments, bezogen auf das Gewicht des Zellstoffs, kann 10 bis 40 Gew.% betragen.For the production of these different decorative base papers can softwood pulp (long fiber pulp) or Hardwood pulp (short fiber pulp) used become. A mixture of softwood / hardwood pulp is preferred in the ratio 10:90 to 90:10. A mixture of softwood / hardwood pulp is particularly preferred in a ratio of 30:70 to 70:30. The Pulp can have a freeness of 20 ° to 60 ° SR Show Schopper-Riegler. To achieve a high A pigment such as titanium dioxide or opacity Calcium carbonate added. The percentage of pigment based on the weight of the pulp, can be 10 to 40 % By weight.

Zu der Zellstoffsuspension, die zur Herstellung des Dekorrohpapiers verwendet wird, können außerdem Naßfestmittel wie Polyamid/Polyamin-Epichlorhydrin-Harz, kationische Polyacrylate, modifiziertes Melamin-Formaldehyd-Harz oder kationisierte Stärken zugegeben werden. Ebenso ist die Zugabe von Retentionshilfsmitteln und Farbstoffen möglich.To the pulp suspension used to manufacture the Decorative base paper can also be used Wet strength agents such as polyamide / polyamine-epichlorohydrin resin, cationic polyacrylates, modified melamine-formaldehyde resin or cationized starches added become. Likewise, the addition of retention aids and dyes possible.

Die Blattbildung kann auf Yankee-Papiermaschinen oder Foudrinier-Papiermaschinen erfolgen.Sheet formation can be done on Yankee paper machines or Foudrinier paper machines.

Für die Tintenaufnahmeschicht können alle bekannten Empfangsschichten eingesetzt werden. Hierbei handelt es sich meistens um hydrophile Beschichtungen, die wasserlösliche oder wasserdispergierbare Polymere enthalten, beispielsweise Polyvinylalkohol, kationischer Polyvinylalkohol, Polyvinylpyrrolidon, Polyvinylacetat, Stärke, Gelatine, Kasein oder Carboxymethylcellulose. Die Tintenaufnahmeschicht kann zusätzlich Pigmente und kationische Substanzen zur Fixierung der Tintenfarbstoffe enthalten. Erfindungsgemäß geeignetete Tintenaufnahmeschichten werden in den deutschen Patenten 43 22 179 und 43 22 178 und in den deutschen Patentanmeldungen 196 04 693 und 196 18 607 beschrieben, auf deren Offenbarung hier Bezug genommen wird. Pigmenthaltige Tintenaufnahmeschichten werden bevorzugt. All known ones can be used for the ink receiving layer Receiving layers are used. This is what it is about are mostly hydrophilic coatings that water-soluble or water-dispersible polymers contain, for example polyvinyl alcohol, cationic Polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl acetate, Starch, gelatin, casein or carboxymethyl cellulose. The Ink receiving layer can additionally pigments and cationic substances for fixing the ink dyes contain. Suitable according to the invention Ink receiving layers are used in the German patents 43 22 179 and 43 22 178 and in the German Patent applications 196 04 693 and 196 18 607 are described, the disclosure of which is incorporated herein by reference. Pigment-containing ink-receiving layers are preferred.

Das Auftragsgewicht der Tintenaufnahmeschicht beträgt 2 bis 20 g/m2, insbesondere 5 bis 15 g/m2. Die Tintenaufnahmeschicht kann mit den üblichen Auftragsverfahren wie Walzenauftrag-, Gravur- oder Nipp-Verfahren und Luftbürsten- oder Rollrakeldosierung aufgetragen werden.The application weight of the ink receiving layer is 2 to 20 g / m 2 , in particular 5 to 15 g / m 2 . The ink absorption layer can be applied using the usual application methods such as roller application, engraving or nipping methods and air brush or roller doctor metering.

Die Erfindung wird durch die folgenden Beispiele weiter erläutert.The invention is further illustrated by the following examples explained.

Beispiel 1example 1

Eine Mischung aus 90 Gew.% Laubholzsulfat-Zellstoff und 10 Gew.% Nadelholzsulfat-Zellstoff wurde bei einer Stoffdichte von 4% bis zu einem Mahlgrad von 42° SR gemahlen. Anschließend erfolgte die Zugabe von 5 Gew.% Melamin-Formaldehyd-Harz und 15 Gew.% Titandioxid (Rutil-Form) (Gewichtsangaben der Zusätze beziehen sich auf den Zellstoff). Aus dieser Mischung wurde ein Kanten-Dekorrohpapier mit einem Flächengewicht von 200 g/m2 und einer Dicke von 300 µm gefertigt. Das Papier hatte eine Glätte von 33 Bekk Sekunden und eine Luftdurchlässigkeit von 7 Gurley Sekunden.A mixture of 90% by weight hardwood sulfate pulp and 10% by weight softwood sulfate pulp was ground at a consistency of 4% to a freeness of 42 ° SR. Subsequently, 5% by weight of melamine-formaldehyde resin and 15% by weight of titanium dioxide (rutile form) were added (weight details of the additives relate to the pulp). An edged decorative base paper with a basis weight of 200 g / m 2 and a thickness of 300 µm was produced from this mixture. The paper had a smoothness of 33 Bekk seconds and an air permeability of 7 Gurley seconds.

Das erhaltene Rohpapier wurde mit einer Tintenaufnahmeschicht beschichtet und mittels Ink-Jet-Verfahren bedruckt.The raw paper obtained was with a Ink receiving layer coated and by means of ink-jet process printed.

Beispiel 2Example 2

Eine Mischung aus 70 Gew.% Laubholzsulfat-Zellstoff und 30 Gew.% Nadelholzsulfat-Zellstoff wurde bei einer Stoffdichte von 4% bis zu einem Mahlgrad von 42° SR gemahlen. Anschließend erfolgte die Zugabe von 5 Gew.% Polyamid/Polyamin-Epichlorhydrin-Harz und 25 Gew.% Titandioxid (Rutil-Form) (Gewichtsangaben der Zusätze beziehen sich auf den Zellstoff).A mixture of 70% by weight hardwood sulfate pulp and 30% by weight of softwood sulfate pulp was used in one Material density of 4% up to a freeness of 42 ° SR ground. Then 5% by weight was added. Polyamide / polyamine-epichlorohydrin resin and 25% by weight Titanium dioxide (rutile form) (weight of the additives refer to the pulp).

Aus dieser Mischung wurde ein Dekorrohpapier zur Flächenveredelung mit einem Flächengewicht von 100 g/m2 und einer Dicke von 120 µm gefertigt. Das Papier hatte eine Glätte von 35 Bekk Sekunden und eine Luftdurchlässigkeit von 8 Gurley Sekunden.A decorative base paper for surface finishing with a basis weight of 100 g / m 2 and a thickness of 120 µm was produced from this mixture. The paper had a smoothness of 35 Bekk seconds and an air permeability of 8 Gurley seconds.

Das erhaltene Dekorrohpapier wurde mit einer Tintenaufnahmeschicht versehen und mittels Ink-Jet-Verfahren bedruckt.The decorative base paper obtained was with a Ink receiving layer provided and by means of ink-jet process printed.

Beispiel 3Example 3

Eine Mischung aus 20 Gew.% Laubholzsulfat-Zellstoff und 80 Gew.% Nadelholzsulfat-Zellstoff wurde bei einer Stoffdichte von 4% bis zu einem Mahlgrad von 45° SR gemahlen. Anschließend erfolgte die Zugabe von 4 Gew.% Polyamid/Polyamin-Epichlorhydrin-Harz, 15 Gew.% Al2O3 und 0,2 Gew.% eines Natriumsalzes einer Polycarbonsäure als Retentionshilfsmittels (Gewichtsangaben der Zusätze beziehen sich auf den Zellstoff). Aus dieser Mischung wurde ein Overlay-Papier mit einem Flächengewicht von 28 g/m2 und einer Dicke von 32 µm gefertigt. Das Papier hatte eine Luftdurchlässigkeit von < 5 Gurley-Sekunden (5-Blatt-Stapelmessung).A mixture of 20% by weight hardwood sulfate pulp and 80% by weight softwood sulfate pulp was ground at a consistency of 4% to a freeness of 45 ° SR. Subsequently, 4% by weight of polyamide / polyamine-epichlorohydrin resin, 15% by weight of Al 2 O 3 and 0.2% by weight of a sodium salt of a polycarboxylic acid were added as retention aids (weight details of the additives relate to the pulp). An overlay paper with a basis weight of 28 g / m 2 and a thickness of 32 μm was produced from this mixture. The paper had an air permeability of <5 Gurley seconds (5-sheet stack measurement).

Das erhaltene Dekorrohpapier wurde mit einer Tintenaufnahmeschicht versehen und mittels Ink-Jet-Verfahren bedruckt. The decorative base paper obtained was with a Ink receiving layer provided and by means of ink-jet process printed.

Beispiel 4Example 4

Eine Mischung aus 50 Gew.% Laubholzsulfat-Zellstoff und 50 Gew.% Nadelholzsulfat-Zellstoff wurde bei einer Stoffdichte von 4 % bis zu einem Mahlgrad von 42° SR gemahlen. Anschließend erfolgte die Zugabe von 5 Gew.% Polyamid/Polyamin-Epichlorhydrin-Harz und 20 Gew.% Titandioxid (Rutil-Form) (Gewichtsangaben der Zusätze beziehen sich auf den Zellstoff). Aus dieser Mischung wurde mit Hilfe einer Yankee-Papiermaschine ein einseitig glattes Dekorrohpapier mit einer Glätte von 30 Bekk Sekunden und mit einer Luftdurchlässigkeit von 7 Gurley Sekunden hergestellt. Anschließend wurde daraus durch Imprägnierung mit einem Harnstoffacrylat ein Vorimprägnat mit einem Flächengewicht von 80 g/m2 und einer Dicke von 80 µm gefertigt. Das Auftragsgewicht des Imprägnierungsmittels betrug 20 g/m2.A mixture of 50% by weight hardwood sulfate pulp and 50% by weight softwood sulfate pulp was ground at a consistency of 4% to a freeness of 42 ° SR. Subsequently, 5% by weight of polyamide / polyamine-epichlorohydrin resin and 20% by weight of titanium dioxide (rutile form) were added (the weight of the additives relates to the pulp). With the help of a Yankee paper machine, this mixture was used to produce a decorative base paper which was smooth on one side and had a smoothness of 30 Bekk seconds and an air permeability of 7 Gurley seconds. Subsequently, a pre-impregnate with a basis weight of 80 g / m 2 and a thickness of 80 μm was produced by impregnation with a urea acrylate. The application weight of the impregnating agent was 20 g / m 2 .

Das erhaltene Vorimprägnat wurde mit einer Tintenaufnahmeschicht versehen und mittels Ink-Jet-Verfahren bedruckt.The prepreg obtained was treated with a Ink receiving layer provided and by means of ink-jet process printed.

Beispiel 5Example 5

Eine Mischung aus 50 Gew.% Laubholz-Sulfatzellstoff und 50 Gew.% Nadelholz-Sulfatzellstoff wurde bei einer Stoffdichte von 4 % bis zu einem Mahlgrad von 50 °SR gemahlen. Der Zellstoffsuspension wurden 30 Gew.% CaCO3, 0,60 Gew.% kationische Stärke, 0,10 Gew.% kationisches Polyacrylamid, 0,25 Gew.% Polyamid/Polyamin-Epichlorhydrin-Harz und 0,30 Gew.% Alkylketendimer (Mengenangaben bezogen auf den Zellstoff) zugesetzt und daraus ein 100 g/m2 schweres Rohpapier gefertigt, das anschließend mit oxidierter Stärke mit einem Auftragsgewicht von 1 g/m2 beschichtet wurde (sogenanntes Folienrohpapier). Das unbeschichtete Rohpapier wies eine Glätte von 33 Bekk Sekunden und eine Luftdurchlässigkeit von 10 Gurley Sekunden auf.A mixture of 50% by weight hardwood sulfate pulp and 50% by weight softwood sulfate pulp was ground at a consistency of 4% to a freeness of 50 ° SR. 30% by weight of CaCO 3 , 0.60% by weight of cationic starch, 0.10% by weight of cationic polyacrylamide, 0.25% by weight of polyamide / polyamine-epichlorohydrin resin and 0.30% by weight of alkyl ketene dimer ( Quantities based on the pulp) added and a 100 g / m 2 raw paper is made from it, which was then coated with oxidized starch with an application weight of 1 g / m 2 (so-called film base paper). The uncoated base paper had a smoothness of 33 Bekk seconds and an air permeability of 10 Gurley seconds.

Das erhaltene Folienrohpapier wurde mit einer Tintenaufnahmeschicht versehen und mittels Ink-Jet-Verfahren bedruckt.The film base paper obtained was with a Ink receiving layer provided and by means of ink-jet process printed.

Vergleichsbeispiel V1Comparative Example V1

Als Vergleichsbeispiel V1 diente ein handelsübliches Dekorrohpapier der Technocell® Dekor GmbH mit einem Flächengewicht von 150 g/m2 und einer Dicke von 190µm. Das Papier hatte eine Glätte von 67 Bekk Sekunden und eine Luftdurchlässigkeit von 22 Gurley Sekunden. Das Papier wurde im herkömmlichen Tiefdruckverfahren bedruckt.A comparative example V1 was a commercially available decorative base paper from Technocell® Dekor GmbH with a weight per unit area of 150 g / m 2 and a thickness of 190 μm. The paper had a smoothness of 67 Bekk seconds and an air permeability of 22 Gurley seconds. The paper was printed using conventional gravure printing.

Die in den Beispielen eingesetzte Tintenaufnahmeschicht hat folgende Zusammensetzung: Polyvinylalkohol, 20 %ige wäßrige Lösung 33 Gew.-Teile Polyacrylamid, 20 %ige wäßrige Lösung 9 Gew.-Teile Acrylsäureester-Polymer, 20 %ige Dispersion 10 Gew.-Teile Amorphes Siliciumdioxid, 20 %ige Dispersion 48 Gew.-Teile The ink-receiving layer used in the examples has the following composition: Polyvinyl alcohol, 20% aqueous solution 33 parts by weight Polyacrylamide, 20% aqueous solution 9 parts by weight Acrylic acid ester polymer, 20% dispersion 10 parts by weight Amorphous silicon dioxide, 20% dispersion 48 parts by weight

Die Beschichtung der Papiere erfolgte mittels Rakeldosierung. Die Auftragsgewichte sind in Tabelle 1 aufgeführt und beziehen sich auf die getrocknete Schicht. Auftragsgewicht g/m2 Beispiel 1 10 Beispiel 2 14 Beispiel 3 5 Beispiel 4 6 Beispiel 5 6 The papers were coated with a doctor knife. The application weights are listed in Table 1 and refer to the dried layer. Application weight g / m 2 example 1 10th Example 2 14 Example 3 5 Example 4 6 Example 5 6

Die erfindungsgemäßen Papiere wurden mit einem Tintenstrahldrucker HP Deskjet® 550C der Firma Hewlett Packard farbig bedruckt. An den bedruckten Papieren wurden die Farbdichten und die Bildschärfe geprüft. Die Ergebnisse sind in Tabelle 2 dargestellt.The papers of the invention were with a Inkjet printer HP Deskjet® 550C from Hewlett Packard printed in color. On the printed papers the color densities and sharpness were checked. The Results are shown in Table 2.

Bestimmung der Farbdichte - Die Farbdichte wurde mit einem Gretag Densitometer an den Farben Cyan, Magenta, Gelb und Schwarz im Auflicht gemessen. Determination of the color density - The color density was measured with a Gretag densitometer on the colors cyan, magenta, yellow and black in incident light.

Bestimmung der Bildschärfe - Die Ermittlung der Bildschärfe erfolgte mittels Bildverarbeitung. Das Muster wurde mit einer CCD-Kamera eingelesen und die Unschärfe an den Farbrändern mit einer idealen Gerade verglichen. Die Abweichung wird als Zahlenwert von 0,00 bis 1,00 (sehr gut bis sehr schlecht) angegeben. Cyan Magenta Gelb Schwarz Bildschärfe B1 1,88 1,12 1,29 1,77 0,25 B2 1,85 1,10 1,25 1,75 0,28 B3 1,80 1,01 1,20 1,69 0,31 B4 1,78 1,02 1,19 1,67 0,32 B5 1,81 1,04 1,24 1,69 0,29 V1 1,31 0,75 1,00 1,54 0,75 Determination of image sharpness - The image sharpness was determined by means of image processing. The pattern was read in with a CCD camera and the blurring at the color edges compared with an ideal straight line. The deviation is given as a numerical value from 0.00 to 1.00 (very good to very bad). Cyan magenta yellow black Sharpness B1 1.88 1.12 1.29 1.77 0.25 B2 1.85 1.10 1.25 1.75 0.28 B3 1.80 1.01 1.20 1.69 0.31 B4 1.78 1.02 1.19 1.67 0.32 B5 1.81 1.04 1.24 1.69 0.29 V1 1.31 0.75 1.00 1.54 0.75

Die Ergebnisse der Prüfungen zeigen, daß mit dem erfindungsgemäßen Dekorpapier Drucke mit einer guten Bildschärfe und hoher Farbdichte erzielt werden können. Entgegen der Vermutung sind bei einem nächsten Verarbeitungsschritt, nämlich der Überlackierung der bedruckten Dekorpapiere, keine Haftungsprobleme aufgetreten. Auch die Trocknungszeit der Tinte bei der Bedruckung eines Vorimprägnats wird nicht beeinträchtigt.The results of the tests show that with the decorative paper prints according to the invention with a good Sharpness and high color density can be achieved. Contrary to the presumption, there is another Processing step, namely the overpainting of the printed decor papers, no liability problems occurred. The drying time of the ink at Printing on a pre-impregnate is not affected.

Claims (9)

Dekorrohpapier für dekorative Beschichtungswerkstoffe, dadurch gekennzeichnet, daß es eine Tintenaufnahmeschicht enthält.Decorative base paper for decorative Coating materials, characterized in that it contains an ink receiving layer. Dekorrohpapier nach Anspruch 1, dadurch gekennzeichnet, daß es mit Melamin-Formaldehyd-Harz, Harnsäure-Formaldehyd-Harz oder Phenol-Formaldehyd-Harz, Harnsäure-Acrylsäureester-Copolymer oder Polyvinylalkohol vorimprägniert ist.Decorative base paper according to claim 1, characterized characterized that it with melamine-formaldehyde resin, Uric acid-formaldehyde resin or phenol-formaldehyde resin, Uric acid-acrylic ester copolymer or polyvinyl alcohol is pre-impregnated. Dekorrohpapier nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß es ein einseitig glattes Dekorrohpapier ist.Decorative base paper according to claim 1 or 2, characterized characterized that it is a one-sided smooth Decorative base paper is. Dekorrohpapier nach Anspruch 1, dadurch gekennzeichnet, daß es ein in einem Soft-Kalander geglättetes Dekorrohpapier ist.Decorative base paper according to claim 1, characterized characterized that there is one in a soft calender smoothed decorative base paper. Dekorrohpapier nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Luftdurchlässigkeit des Dekorrohpapiers 3 bis 20 Gurley Sekunden beträgt.Decorative base paper according to one of claims 1 to 3, characterized in that the air permeability of the Decorative base paper is 3 to 20 Gurley seconds. Dekorrohpapier nach einem der Ansprüche 1 oder 4, dadurch gekennzeichnet, daß die Luftdurchlässigkeit des Dekorrohpapiers 20 bis 40, insbesondere 30 bis 40 Gurley Sekunden beträgt.Decorative base paper according to one of claims 1 or 4, characterized in that the air permeability of the Decorative base paper 20 to 40, in particular 30 to 40 Gurley Seconds. Dekorrohpapier nach einem der Ansprüche 1, 2, 3 oder 5, dadurch gekennzeichnet, daß die Glätte 50 Bekk Sekunden nicht übersteigt. Decorative base paper according to one of claims 1, 2, 3 or 5, characterized in that the smoothness 50 Bekk Seconds. Dekorrohpapier nach einem der Ansprüche 1, 4 oder 6, dadurch gekennzeichnet, daß die Glätte mindestens 50 Bekk Sekunden beträgt.Decorative base paper according to one of claims 1, 4 or 6, characterized in that the smoothness at least 50 Bekk Seconds. Dekorrohpapier nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Tintenaufnahmeschicht ein Pigment enthält.Decorative base paper according to one of claims 1 to 8, characterized in that the ink-receiving layer is a Contains pigment.
EP00107212A 1999-04-13 2000-04-01 Decorative base paper with ink jet ink accepting layer Expired - Lifetime EP1044822B1 (en)

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