EP0870872A1 - One-side impregnated printing paper support - Google Patents

One-side impregnated printing paper support Download PDF

Info

Publication number
EP0870872A1
EP0870872A1 EP19980106207 EP98106207A EP0870872A1 EP 0870872 A1 EP0870872 A1 EP 0870872A1 EP 19980106207 EP19980106207 EP 19980106207 EP 98106207 A EP98106207 A EP 98106207A EP 0870872 A1 EP0870872 A1 EP 0870872A1
Authority
EP
European Patent Office
Prior art keywords
paper
pigment
resin
film
thin
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
EP19980106207
Other languages
German (de)
French (fr)
Other versions
EP0870872B1 (en
Inventor
Klaus Dipl.-Ing. Rienäcker
Bernd Dr.-Ing. Reinhardt
Heinrich Hörnschemeyer
Reinhard Janssen
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.)
Ahlstrom Osnabrueck GmbH
Original Assignee
Kammerer 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 claimed from DE19715268A external-priority patent/DE19715268A1/en
Application filed by Kammerer GmbH filed Critical Kammerer GmbH
Publication of EP0870872A1 publication Critical patent/EP0870872A1/en
Application granted granted Critical
Publication of EP0870872B1 publication Critical patent/EP0870872B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
    • 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
    • D21H17/57—Polyureas; Polyurethanes
    • 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
    • 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
    • D21H17/71—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes
    • D21H17/72—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes of organic material
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/385—Oxides, hydroxides or carbonates
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/62—Macromolecular organic compounds or oligomers thereof obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/70—Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group
    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod
    • D21H25/14—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod the body being a casting drum, a heated roll or a calender
    • 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]
    • Y10T428/31786—Of polyester [e.g., alkyd, 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/3188—Next to cellulosic
    • Y10T428/31895—Paper or wood
    • 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]
    • Y10T428/31942—Of aldehyde or ketone condensation product
    • Y10T428/31949—Next to cellulosic
    • Y10T428/31964—Paper
    • 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]
    • Y10T428/31971—Of carbohydrate
    • Y10T428/31993—Of paper

Definitions

  • the invention relates to pigment coated on one side Thin film based on prepregs.
  • Decorative films with a finish surface are decorative Surface materials for chipboard and MDF boards (medium density fibreboard) in furniture making. This Decorative films are soaked in synthetic resin or resin-impregnated and afterwards surface treated, decoratively printed or unprinted paper webs in one under pressure and warmth state that can no longer be reactivated.
  • Impregnation process is between thermosetting decorative films with fully impregnated core (off line process) and Decorative films based on pre-impregnated materials (online process) distinguished on which subsequently one Finish coating can be made. Consequently creates a decorative film that has a finished surface owns.
  • the desired opacity and coloring become the paper pulp and possibly also lightfastness Pre-impregnated.
  • Pre-impregnates or decorative films with a mass per unit area of between 20 and 80 g / m 2 are referred to as thin-film films.
  • These thin-film films are usually characterized by good flatness and thus easy laminating, while the printability with water-based or solvent-based gravure inks only satisfies moderate demands due to the limited smoothability due to the synthetic resin content.
  • the object of the invention was therefore to provide thin-film films mass as low as possible to provide that with sufficient gap strength good flatness and equally good or even Faster roll lamination with aqueous adhesives exhibit, but also by a very good Characterize deep printability and paintability.
  • the thin film should be comparable area-related mass, if possible a higher one Lightfastness and opacity than normal Japanese papers and have better strengths than known pre-impregnates.
  • pulp fiber mixtures with high absorbency and Strength for example from eucalyptus pulp and Pine wood sulfate pulp.
  • a Ground sizing is not essential and that Cellulose fiber mixture can vary depending on the desired Intended use contain white pigments or color pigments.
  • the pigment coating formed on one side of the thin film has a mass of 1 to 8 g / m 2 , for example 3, 5 or 7 g / m 2 .
  • the ratio of pigment to binder in the pigment coat can be 1: 0.05 to 1: 2 and in a particularly preferred embodiment 0.05 to 1: 2 or 1: 0.08 to 1: 0.35, based on the solids content.
  • white pigments such as kaolin, calcium carbonate, aluminum hydroxide, talc, Titanium dioxide or color pigments, such as iron oxide pigments, Carbon black, copper, aluminum, other metal pigments or organic color pigments used alone or in a mixture optionally with the addition of liquid dyes.
  • color pigments such as iron oxide pigments, Carbon black, copper, aluminum, other metal pigments or organic color pigments used alone or in a mixture optionally with the addition of liquid dyes.
  • Binders such as starch, polyvinyl alcohol, Carboxymethyl cellulose, polymer dispersions based of acrylic acid, acrylic acid ester, styrene, butadiene, Contain vinyl acetate or acrylonitrile.
  • the pigment line contains 1 up to 30% by weight, based on the pigment content, melamine resin, Urea resin, phenolic resin or glyoxal resin. Usual Crosslinking agents and penetration aids can be in the Pigment line can be included.
  • the pigment line has barrier properties aqueous or solvent-containing substances, such as Varnishes and printing inks.
  • aqueous or solvent-containing substances such as Varnishes and printing inks.
  • flaky pigments such as kaolin, aluminum hydroxide or talc is particularly preferred.
  • Aqueous can be used to impregnate the base paper Polymer dispersions based on the above Monomers and melamine, urea, phenol or Glyoxal resins and their mixtures with polymer dispersions be used. By adding a maximum of about ten parts by weight (solid) of white pigment Impregnating liquid can reduce the opacity of white pre-impregnates can still be increased.
  • the resin intake can be 5 to 30 % By weight, based on the weight of the base paper, preferably 5 up to 15% by weight.
  • impregnation mixtures can be further Auxiliaries, such as wetting agents, viscosity regulators, Non-stick and penetration aids, pigments, Dyes and defoamers can be added.
  • the pigment coat can preferably by means of so-called thin-layer technology within the Paper machine can be applied to the base paper. This procedure is described in Das Paper, 1991, Issue 10 A, p. V120-V124 and Kliblatt für Textilfabrikation, 1993, Issue 10, pp. 390-393 and 1994, Issue 17, pp.671-676.
  • Thin film has the so-called differential Coating style of driving proved to be particularly advantageous in "Wochenblatt für Textilfabrikation (1992) No. 6, S.198-205 ".
  • this Application technology becomes thin on one side Pigment coat using the aforementioned Thin coating technology applied to the paper web and at the same time the other is impregnated Paper side in the roller nip (swamp formation).
  • the impregnation turns the paper structure into Depends on the later processing requirements measurable in its elasticity or brittleness / flatness changed.
  • the invention is distinguished Decorative film with the impregnated paper back a fast and firm connection with the laminating chipboard or MDF board. This also contributes the physico-chemical surface design of the Thin film significantly.
  • the impregnated and surface-pigmented thin-film films can be smoothed on one side, with one on-line smoothing using a soft or machine calender Preserving the opacity of the paper as special has proven advantageous.
  • the one-sided pigment-coated Thin film based on prepregs have a sufficiently good flatness and Gap resistance and on the pigment-coated side very good printability and paintability.
  • Synthetic resin impregnated back of the paper allows a quick and easy gluing on Fiberboard.
  • the thin-film film according to the invention is also for other applications where paper backing is suitable excellent one-sided printability or Coatability with aqueous or solvent-based Media are desired and also very good ones Can be glued or laminated to the back of the paper with different substrate materials becomes.
  • Examples include wall coverings, Poster materials and special cover papers for Called packaging.
  • a light brown colored base paper of 45 g / m 2 with a fiber composition of 80% eucalyptus and 20% pine sulfate pulp without bulk sizing and with a filler insert of 25 was placed on an approximately 2.30 m wide paper machine with a machine speed of 400 m / min kg of titanium dioxide per ton of fibrous material produced and provided on one side with a clay pigment coat of high binder content of 3 to 4 g / m 2 on a two-roll applicator (film press) using the differential coating method and impregnated on the back with a synthetic resin mixture of acrylate dispersion and urea resin.
  • the resin absorption was about 10%, based on the weight of the base paper.
  • the paper was then smoothed off line on one side on the pigment-coated side on a technical soft calender.
  • the properties of the paper according to the invention achieved in this way are compared with the paper properties of conventional Japanese films and pre-impregnates of comparable mass per unit area and color.
  • the single-layer pigment-coated thin-film film according to the invention based on "pre-impregnate" of 45 g / m 2 showed in the laboratory test compared to conventional furniture pre-impregnates of 53 g / m 2 better printability in gravure printing and a higher gloss after coating with aqueous acrylate lacquer (9 g / m 2 varnish application) on the pigmented paper top as well as a faster knocking away of the aqueous laminating adhesives (based on acrylate or urea) on the back of the paper (see also water absorption values). From this it can be concluded that the paper according to the invention can be better bonded / laminated to the fiberboard. The somewhat poorer flatness should not have a negative impact on the laminating process. In contrast, the coverage of the fiberboard is somewhat poorer due to the lower ash content and the slightly lower opacity associated with it. In addition, the light fastness is worse.
  • the thin film according to the invention Compared to conventional Japanese films, the thin film according to the invention a slightly better Printability in gravure, a significantly better one Paint level and faster knocking away of the adhesive on the back of the paper (improved stickability / laminability).
  • the cover of the fiberboard is due to the somewhat higher opacity of the paper according to the invention better.
  • the light fastness is compared to the conventional one Japanese film light due to the surface pigmentation better.
  • Example 1 Analogously to Example 1, a white (bleached) base paper of 47 g / m 2 with a fiber composition of 80% eucalyptus and 20% pine sulfate pulp and with a filler insert of 50 kg titanium dioxide per ton of fiber was produced on the paper machine and analogously to Example 1 Apply the pigment coating (clay) on one side using the "differential coating” method and impregnate on the back.
  • the paper was then used online of a soft calender smoothed.
  • a white (bleached) base paper of 80 g / m 2 with a fiber composition of 80% eucalyptus and 20% pine sulfate pulp and with a filler insert of 250 kg clay and 50 kg talc per t fiber was used on the paper machine produced.
  • the paper stock was fully sized in size (resin size) in order to limit the penetration into the paper structure of the impregnating or coating compositions subsequently applied by means of the “differential coating” method.
  • the back of the paper web was, however, with a Latex / synthetic resin mixture analogous to Examples 1 and 2 partially impregnated.
  • the impregnation resin absorption was therefore only 5% of the raw paper weight.
  • This paper which is referred to as printing base paper and is slightly pigmented on the basis of "pre-impregnate"
  • the opacity must influence the influence of the higher mass per unit area of printing base paper will.
  • Example 1 a light brown colored base paper with a weight per unit area of about 45 g / m 2 was produced, the coloring not being carried out using a liquid dye but using iron oxide pigments.
  • the back of the paper web was, however, with the impregnated with the same latex / synthetic resin mixture as in the Examples 1 to 3.
  • the impregnation resin absorption was 30% of the Raw paper weight.
  • a colored base paper with a basis weight of about 45 g / m 2 was produced in accordance with Example 4.
  • the one-sided pigment coating of the paper web was carried out with a mixture of acrylic latex and urea resin in a ratio of 90:10 (solid), to which about twice the amount of clay (solid) was added.
  • the back of the paper web was impregnated with the same latex / synthetic resin mixture as in Examples 1 and 2.
  • the impregnation resin absorption was about 10% of the Raw paper weight.
  • the product Compared to the papers produced according to Examples 1, 2 and 4, the product has slightly better printability and varnishability and higher elasticity.

Landscapes

  • Paper (AREA)
  • Laminated Bodies (AREA)
  • Duplication Or Marking (AREA)
  • Magnetic Heads (AREA)
  • Inorganic Insulating Materials (AREA)

Abstract

Laminating sheet consisting of base paper with pigment marking on the printing or varnishing side, which is impregnated from the other side of the paper with an impregnating resin. Preferably the pigment marking is applied in amounts of 1-8 g/m<2>; it contains 1-30 wt% melamine resin, urea resin, phenolic resin or glyoxal resin, and shows a pigment to binder ratio of (1:0.05)-(1:2.00) based on solid substance. The base paper shows a resin uptake of 5-30% of its wt., based on solid contents.

Description

Die Erfindung betrifft einseitig pigmentgestrichene Dünnschichtfolien auf der Basis von Vorimprägnaten.The invention relates to pigment coated on one side Thin film based on prepregs.

Dekorfolien mit Finishoberfläche sind dekorative Oberflächenmaterialien für Span- und MDF-Platten (mitteldichte Faserplatten) im Möbelbau. Diese Dekorfolien sind kunstharzgetränkte oder kunstharzgetränkte und nachträglich oberflächenbehandelte, dekorativ bedruckte oder unbedruckte Papierbahnen in einem unter Druck und Wärme nicht mehr reaktivierbaren Zustand. Je nach Art des Tränkverfahrens wird zwischen duroplastischen Dekorfolien mit durchimprägniertem Kern (off line-Verfahren) und Dekorfolien auf der Basis von Vorimprägnaten (on line-Verfahren) unterschieden, auf denen anschließend eine Finish-Beschichtung vorgenommen werden kann. Somit entsteht eine Dekorfolie, die eine fertige Oberfläche besitzt.Decorative films with a finish surface are decorative Surface materials for chipboard and MDF boards (medium density fibreboard) in furniture making. This Decorative films are soaked in synthetic resin or resin-impregnated and afterwards surface treated, decoratively printed or unprinted paper webs in one under pressure and warmth state that can no longer be reactivated. Depending on the type of Impregnation process is between thermosetting decorative films with fully impregnated core (off line process) and Decorative films based on pre-impregnated materials (online process) distinguished on which subsequently one Finish coating can be made. Consequently creates a decorative film that has a finished surface owns.

Dekorfolien auf der Basis von Vorimprägnaten werden bereits innerhalb der Papiermaschine, unmittelbar nach der Blattbildung, mit einem Harzgemisch in Abhängigkeit von der flächenbezogenen Masse des Basispapiers mehr oder weniger tief getränkt. Nach der Trocknung muß das Papier oder die Folie spaltfest sein, damit bei den nachfolgenden Verarbeitungsschritten der Finish-Beschichtung und Kaschierung auf entsprechende Träger keine Fasertrennung innerhalb der Dekorfolie eintritt.Decorative films based on pre-impregnates already inside the paper machine, immediately after leaf formation, depending on a resin mixture of the area-related mass of the base paper more or less soaked. After drying, the paper needs to be or the film should be gap-proof so that the subsequent processing steps of the finish coating and lamination on appropriate supports there is no fiber separation within the decorative film.

Durch hohen Zusatz von Weißpigmenten oder Farbpigmenten zu der Papiermasse wird die gewünschte Opazität, Färbung und gegebenenfalls auch Lichtechtheit dieser Vorimprägnate erreicht.By adding white or colored pigments the desired opacity and coloring become the paper pulp and possibly also lightfastness Pre-impregnated.

Vorimprägnate oder Dekorfolien mit einer flächenbezogenen Masse zwischen 20 und 80 g/m2 werden als Dünnschichtfolien bezeichnet. Diese Dünnschichtfolien zeichnen sich meist durch eine gute Planlage und damit problemlose Kaschierbarkeit aus, während die Bedruckbarkeit mit wässrigen oder lösungsmittelhaltigen Tiefdruckfarben aufgrund der begrenzten Glättbarkeit durch den Kunstharzanteil nur mittleren Ansprüchen genügt.Pre-impregnates or decorative films with a mass per unit area of between 20 and 80 g / m 2 are referred to as thin-film films. These thin-film films are usually characterized by good flatness and thus easy laminating, while the printability with water-based or solvent-based gravure inks only satisfies moderate demands due to the limited smoothability due to the synthetic resin content.

Bekannt sind ferner nicht imprägnierte Dünnschichtfolien, sogenannte Japanpapiere, mit flächenbezogenen Massen zwischen 20 und 50 g/m2, die zunehmend als dekorative Oberflächenmaterialien eingesetzt werden.Also known are non-impregnated thin-film films, so-called Japanese papers, with mass per unit area between 20 and 50 g / m 2 , which are increasingly being used as decorative surface materials.

Im Gegensatz zu Vorimprägnaten enthalten diese weißen oder gefärbten Papiere keine oder nur geringe Pigmentanteile und besitzen dadurch im unbehandelten Zustand nur eine geringe Opazität. Dadurch sind sie nur begrenzt in der Lage, die Oberfläche von Span- und MDF-Platten ausreichend abzudecken. Diese Japanpapiere weisen eine sehr gute innere Festigkeit und einseitige Glätte aus, die eine sehr gute Tiefbedruckbarkeit und Lackierbarkeit ermöglichen. Dagegen neigen diese nicht mit Kunstharzen imprägnierten, sondern lediglich oberflächig mit einem unpigmentierten Polymerfilm behandelten Japanpapiere beim Kaschierprozeß unter Verwendung meist wäßriger Klebstoffe sehr stark zum Einrollen an den Kanten. Im allgemein üblichen kontinuierlichen Verfahren mittels Rollenkaschier-Anlagen ist deshalb deren Fixierung und Trocknung auf Span- oder MDF-Platten nur unter Schwierigkeiten möglich. Die damit abgedeckten Platten lassen sich dann aber ebenso problemlos wie bei der Verwendung von Vorimprägnaten bearbeiten, da das aufkaschierte Papier nur einen kurzen Faserausriß zeigt.In contrast to pre-impregnates, these contain white or dyed paper no or little Pigment components and therefore have untreated Condition only low opacity. That's just what they are able to limit the surface of chip and Cover MDF boards sufficiently. These Japanese papers have a very good internal strength and one-sided Smoothness out, which is a very good gravure printability and Enable paintability. On the other hand, they do not tend impregnated with synthetic resins, but only on the surface with an unpigmented polymer film treated Japanese papers during the lamination process Use mostly aqueous adhesives very strongly for Roll up on the edges. Generally common continuous process using roll lamination systems is therefore their fixation and drying on chipboard or MDF boards only possible with difficulty. The one with it covered plates can then also be used as easily as when using pre-impregnates edit, since the laminated paper only a short Fiber tear shows.

Aufgabe der Erfindung war es deshalb, Dünnschichtfolien möglichst niedriger flächenbezogener Masse bereitzustellen, die bei ausreichender Spaltfestigkeit eine gute Planlage und eine gleich gute oder sogar schnellere Rollenkaschierbarkeit mit wäßrigen Klebstoffen aufweisen, sich aber zusätzlich durch eine sehr gute Tiefbedruckbarkeit und Lackierbarkeit auszeichnen. Außerdem sollten die Dünnschichtfolien bei vergleichbarer flächenbezogener Masse möglichst eine höhere Lichtechtheit und Opazität als übliche Japanpapiere und bessere Festigkeiten als bekannte Vorimprägnate besitzen.The object of the invention was therefore to provide thin-film films mass as low as possible to provide that with sufficient gap strength good flatness and equally good or even Faster roll lamination with aqueous adhesives exhibit, but also by a very good Characterize deep printability and paintability. In addition, the thin film should be comparable area-related mass, if possible a higher one Lightfastness and opacity than normal Japanese papers and have better strengths than known pre-impregnates.

Gelöst wird diese Aufgabe durch eine Dünnschichtfolie, die auf der Oberseite des Papiers, der Druck- oder Lackierseite, einen Pigmentstrich aufweist und ausgehend von der Unterseite, der Kaschierseite, mit einem Tränkharzharz imprägniert ist.This task is solved by a thin film, those on the top of the paper, the print or Paint side, has a pigment coat and outgoing from the bottom, the lamination side, with a Impregnation resin is impregnated.

Zur Herstellung der erfindungsgemäßen Dünnschichtfolien werden Zellstoffasergemische hoher Saugfähigkeit und Festigkeit, beispielsweise aus Eukalyptus-Zellstoff und Kiefernholzsulfat-Zellstoff, eingesetzt. Eine Masseleimung ist nicht unbedingt erforderlich und das Zellstoffasergemisch kann je nach gewünschtem Anwendungszweck Weißpigmente oder Farbpigmente enthalten. For the production of the thin-film films according to the invention are pulp fiber mixtures with high absorbency and Strength, for example from eucalyptus pulp and Pine wood sulfate pulp. A Ground sizing is not essential and that Cellulose fiber mixture can vary depending on the desired Intended use contain white pigments or color pigments.

Der auf der einen Seite der Dünnschichtfolie ausgebildete Pigmentstrich besitzt eine Masse von 1 bis 8 g/m2, beispielsweise 3, 5 oder 7 g/m2. Das Verhältnis Pigment zu Bindemittel im Pigmentstrich kann 1 : 0,05 bis 1 : 2 und in einer besonders bevorzugten Ausführungsform 0,05 bis 1 : 2 oder 1 : 0,08 bis 1 : 0,35, bezogen auf den Feststoffgehalt, betragen.The pigment coating formed on one side of the thin film has a mass of 1 to 8 g / m 2 , for example 3, 5 or 7 g / m 2 . The ratio of pigment to binder in the pigment coat can be 1: 0.05 to 1: 2 and in a particularly preferred embodiment 0.05 to 1: 2 or 1: 0.08 to 1: 0.35, based on the solids content.

Zur Herstellung des Pigmentstrichs werden Weißpigmente, wie Kaolin, Calciumcarbonat, Aluminiumhydroxid, Talkum, Titandioxid oder Farbpigmente, wie Eisenoxidpigmente, Ruß, Kupfer-, Aluminium, andere Metallpigmente oder organische Farbpigmente allein oder im Gemisch eingesetzt gegebenenfalls unter Zusatz von Flüssigfarbstoffen. Der Pigmentstrich kann natürliche oder synthetische Bindemittel, wie Stärke, Polyvinylalkohol, Carboxymethylcellulose, Polymerdispersionen auf der Basis von Acrylsäure, Acrylsäureester, Styrol, Butadien, Vinylacetat oder Acrylnitril enthalten. Gemäß einer bevorzugten Ausführungsform enthält der Pigmentstrich 1 bis 30 Gew.%, bezogen auf den Pigmentanteil, Melaminharz, Harnstoffharz, Phenolharz oder Glyoxalharz. Übliche Vernetzungsmittel und Penetrationshilfsmittel können im Pigmentstrich enthalten sein.To produce the pigment coat, white pigments, such as kaolin, calcium carbonate, aluminum hydroxide, talc, Titanium dioxide or color pigments, such as iron oxide pigments, Carbon black, copper, aluminum, other metal pigments or organic color pigments used alone or in a mixture optionally with the addition of liquid dyes. Of the Pigment coat can be natural or synthetic Binders such as starch, polyvinyl alcohol, Carboxymethyl cellulose, polymer dispersions based of acrylic acid, acrylic acid ester, styrene, butadiene, Contain vinyl acetate or acrylonitrile. According to one In a preferred embodiment, the pigment line contains 1 up to 30% by weight, based on the pigment content, melamine resin, Urea resin, phenolic resin or glyoxal resin. Usual Crosslinking agents and penetration aids can be in the Pigment line can be included.

Der Pigmentstrich besitzt Barriereeigenschaften gegenüber wäßrigen oder lösungsmittelhaltigen Substanzen, wie Lacken und Druckfarben. Um bei möglichst dünnen Pigmentstrichen eine gute Glättbarkeit und damit ausreichende Barriereeigenschaften zu erzielen, sind plättchenförmige Pigmente, wie Kaolin, Aluminiumhydroxid oder Talkum besonders bevorzugt.The pigment line has barrier properties aqueous or solvent-containing substances, such as Varnishes and printing inks. To be as thin as possible Pigment lines a good smoothability and thus sufficient barrier properties are to be achieved flaky pigments, such as kaolin, aluminum hydroxide or talc is particularly preferred.

Der Erniedrigung der flächenbezogenen Masse der erfindungsgemäßen einseitig pigmentgestrichenen Dünnschichtfolien sind jedoch Grenzen im Hinblick auf die Festigkeit und Deckkraft (Opazität) der Dekorfolie gesetzt. Einerseits kann zwar durch Zusatz opazitätssteigender, lichtechter Weiß- oder Farbpigmente zur Faserstoffmasse die Opazität erhöht werden, was aber gleichzeitig die Papierfestigkeit negativ beeinflußt. Der Zusatz von Trocken- und Naßfestigkeitsmitteln kann diese negative Beeinflussung der Papierfestigkeit in gewissem Maß vermindern. Andererseits ist es bei der Herstellung von gefärbten Papieren durchaus möglich, teilweise oder vollständig diese Pigmente durch wäßrige Farbstoffe geringerer Lichtechtheit zu ersetzen, da der Pigmentstrich den Nachteil einer geringeren Lichtechtheit solcher gefärbten Papiere auszugleichen vermag. Durch den Zusatz von beispielsweise anionischen oder kationischen Direktfarbstoffen zum Faserstoff wird die gewünschte Färbung des Papiers ohne Festigkeitseinbuße erreicht, gleichzeitig aber durch den einseitig ausgebildeten Pigmentstrich noch die Opazität und die Lichtechtheit verbessert.The lowering of the mass per unit area pigment-coated on one side according to the invention However, thin film films are limits with regard to the Strength and opacity of the decorative film set. On the one hand, by adding opacity-increasing, lightfast white or color pigments to the pulp mass, the opacity are increased, but what at the same time negatively affects paper strength. Of the The addition of dry and wet strength agents can do this negative influence on paper strength in some Reduce dimension. On the other hand, it is in the manufacture of colored paper is possible, partly or complete these pigments by aqueous dyes less light fastness to replace, since the Pigment coating has the disadvantage of lower light fastness such colored papers is able to compensate. By the Addition of, for example, anionic or cationic Direct dyes to the fiber material is the desired one Coloring of the paper achieved without loss of strength, but at the same time through the one-sided training Pigment coat still the opacity and lightfastness improved.

Zur Tränkung des Rohpapiers können wäßrige Polymerdispersionen auf der Basis der oben genannten Monomeren und Melamin-, Harnstoff-, Phenol- oder Glyoxalharze sowie deren Gemische mit Polymerdispersionen eingesetzt werden. Durch anteiligen Zusatz von höchstens etwa zehn Gewichtsteilen (fest) Weißpigment zur Tränkflüssigkeit kann die Opazität weißer Vorimprägnate noch gesteigert werden. Die Harzaufnahme kann 5 bis 30 Gew.%, bezogen auf das Rohpapiergewicht, vorzugsweise 5 bis 15 Gew.% betragen.Aqueous can be used to impregnate the base paper Polymer dispersions based on the above Monomers and melamine, urea, phenol or Glyoxal resins and their mixtures with polymer dispersions be used. By adding a maximum of about ten parts by weight (solid) of white pigment Impregnating liquid can reduce the opacity of white pre-impregnates can still be increased. The resin intake can be 5 to 30 % By weight, based on the weight of the base paper, preferably 5 up to 15% by weight.

Ferner können den Imprägniergemischen weitere Hilfsmittel, wie Benetzungsmittel, Viskositätsregler, Antihaft- und Penetrationshilfsmittel, Pigmente, Farbstoffe und Entschäumer zugesetzt werden.Furthermore, the impregnation mixtures can be further Auxiliaries, such as wetting agents, viscosity regulators, Non-stick and penetration aids, pigments, Dyes and defoamers can be added.

Der Pigmentstrich kann vorzugsweise mittels der sogenannten Dünnstrichtechnologie innerhalb der Papiermaschine auf das Rohpapier aufgebracht werden. Beschrieben ist diese Verfahrensweise in Das Papier, 1991, Heft 10 A, S. V120-V124 sowie Wochenblatt für Papierfabrikation, 1993, Heft 10, S.390-393 und 1994, Heft 17, S.671-676.The pigment coat can preferably by means of so-called thin-layer technology within the Paper machine can be applied to the base paper. This procedure is described in Das Papier, 1991, Issue 10 A, p. V120-V124 and Wochenblatt für Papierfabrikation, 1993, Issue 10, pp. 390-393 and 1994, Issue 17, pp.671-676.

Für die Herstellung der erfindungsgemäßen Dünnschichtfolien hat sich die sogenannte Differential Coating-Fahrweise als besonders vorteilhaft erwiesen, die im "Wochenblatt für Papierfabrikation (1992) Nr. 6, S.198-205" beschrieben ist. Bei Anwendung dieser Auftragstechnologie wird einseitig ein dünner Pigmentstrich mittels der zuvor erwähnten Dünnstrichtechnologie auf die Papierbahn aufgebracht und gleichzeitig erfolgt das Imprägnieren von der anderen Papierseite im Walzennip (Sumpfausbildung).For the production of the invention Thin film has the so-called differential Coating style of driving proved to be particularly advantageous in "Wochenblatt für Papierfabrikation (1992) No. 6, S.198-205 ". When using this Application technology becomes thin on one side Pigment coat using the aforementioned Thin coating technology applied to the paper web and at the same time the other is impregnated Paper side in the roller nip (swamp formation).

Durch die Imprägnierung wird das Papiergefüge in Abhängigkeit von den späteren Verarbeitungsanforderungen in seiner Elastizität oder Sprödigkeit/Planlage meßbar verändert. Außerdem zeichnet sich die erfindungsgemäße Dekorfolie mit der imprägnierten Papierrückseite durch eine schnelle und feste Verbindung mit der zu kaschierenden Span- oder MDF-Platte aus. Dazu trägt auch die physikalisch-chemische Oberflächengestaltung der Dünnschichtfolie wesentlich bei.The impregnation turns the paper structure into Depends on the later processing requirements measurable in its elasticity or brittleness / flatness changed. In addition, the invention is distinguished Decorative film with the impregnated paper back a fast and firm connection with the laminating chipboard or MDF board. This also contributes the physico-chemical surface design of the Thin film significantly.

Die erfindungsgemäßen imprägnierten und oberflächenpigmentierten Dünnschichtfolien können einseitig geglättet werden, wobei sich eine on line-Glättung mittels Soft- oder Maschinenkalander zur Erhaltung der Opazität des Papiers als besonders vorteilhaft erwiesen hat.The impregnated and surface-pigmented thin-film films can be smoothed on one side, with one on-line smoothing using a soft or machine calender Preserving the opacity of the paper as special has proven advantageous.

Die erfindungsgemäßen einseitig pigmentgestrichenen Dünnschichtfolien auf der Basis von Vorimprägnaten besitzen eine ausreichend gute Planlage und Spaltfestigkeit sowie auf der pigmentgestrichenen Seite sehr gute Bedruckbarkeit und Lackierbarkeit. Die mit Kunstharzen imprägnierte Rückseite des Papiers ermöglicht eine schnelle und problemlose Verleimung auf Faserstoffplatten.The one-sided pigment-coated Thin film based on prepregs have a sufficiently good flatness and Gap resistance and on the pigment-coated side very good printability and paintability. With Synthetic resin impregnated back of the paper allows a quick and easy gluing on Fiberboard.

Die erfindungsgemäße Dünnschichtfolie ist ebenfalls für andere Anwendungen geeignet, bei denen Papierträger mit ausgezeichneter einseitiger Bedruckbarkeit bzw. Beschichtbarkeit mit wäßrigen oder lösungsmittelhaltigen Medien erwünscht sind und außerdem sehr gute Verklebbarkeit oder Kaschierbarkeit der Papierrückseite mit unterschiedlichen Untergrundmaterialien gefordert wird. Als Beispiele seien Wandbekleidungen, Postermaterialien und spezielle Abdeckpapiere für Verpackungen genannt.The thin-film film according to the invention is also for other applications where paper backing is suitable excellent one-sided printability or Coatability with aqueous or solvent-based Media are desired and also very good ones Can be glued or laminated to the back of the paper with different substrate materials becomes. Examples include wall coverings, Poster materials and special cover papers for Called packaging.

Die folgenden Beispiele erläutern die Erfindung. Alle Mengenangaben beziehen sich auf den Feststoff oder Feststoffgehalt sofern anderes nicht angegeben ist.The following examples illustrate the invention. All Quantities refer to the solid or Solids content unless otherwise stated.

Beispiel 1example 1

Auf einer etwa 2,30 m breiten Papiermaschine mit einer Maschinengeschwindigkeit von 400 m/Min wurde ein hellbraun eingefärbtes Rohpapier von 45 g/m2 mit einer Faserstoffzusammensetzung von 80 % Eukalyptus- und 20 % Kiefernsulfat-Zellstoff ohne Masseleimung und mit einem Füllstoffeinsatz von 25 kg Titandioxid pro Tonne Faserstoff hergestellt und auf einem Zweiwalzenauftragswerk (Filmpresse) unter Anwendung der Differential Coating-Fahrweise einseitig mit einem Clay-Pigmentstrich hohen Bindemittelanteils von 3 bis 4 g/m2 versehen und auf der Rückseite mit einem Kunstharzgemisch aus Acrylatdispersion und Harnstoffharz imprägniert. Die Harzaufnahme betrug etwa 10 %, bezogen auf das Rohpapiergewicht. Das Papier wurde anschließend off line auf einem Technikums-Softkalander einseitig auf der pigment-gestrichenen Seite geglättet. Die dadurch erzielten Eigenschaften des erfindungsgemäßen Papiers sind den Papiereigenschaften herkömmlicher Japanfolien und Vorimprägnate vergleichbarer flächenbezogener Masse und Färbung gegenübergestellt.A light brown colored base paper of 45 g / m 2 with a fiber composition of 80% eucalyptus and 20% pine sulfate pulp without bulk sizing and with a filler insert of 25 was placed on an approximately 2.30 m wide paper machine with a machine speed of 400 m / min kg of titanium dioxide per ton of fibrous material produced and provided on one side with a clay pigment coat of high binder content of 3 to 4 g / m 2 on a two-roll applicator (film press) using the differential coating method and impregnated on the back with a synthetic resin mixture of acrylate dispersion and urea resin. The resin absorption was about 10%, based on the weight of the base paper. The paper was then smoothed off line on one side on the pigment-coated side on a technical soft calender. The properties of the paper according to the invention achieved in this way are compared with the paper properties of conventional Japanese films and pre-impregnates of comparable mass per unit area and color.

Die erfindungsgemäße einseitig pigmentgestrichene Dünnschichtfolie auf der Basis von "Vorimprägnat" von 45 g/m2 ergab im Labortest im Vergleich zu üblichen Möbelvorimprägnaten von 53 g/m2 eine bessere Bedruckbarkeit im Tiefdruck sowie einen höheren Glanz nach erfolgter Lackierung mit wäßrigem Acrylatlack (9 g/m2 Lackauftrag) auf der pigmentierten Papieroberseite sowie eine schnelleres Wegschlagen der wäßrigen Kaschierklebstoffe (auf Acrylat- oder Harnstoffbasis) auf der Papierrückseite (s. auch Wasserabsorptions-Werte). Daraus läßt sich auf eine bessere Verklebbarkeit/Kaschierbarkeit des erfindungsgemäßen Papiers mit der Faserplatte schließen. Die etwas schlechtere Planlage dürfte sich nicht negativ beim Kaschierprozeß auswirken. Die Abdeckung der Faserplatte ist dagegen aufgrund des geringeren Aschegehalts und der damit verbundenen leicht geringeren Opazität etwas schlechter. Außerdem ist die Lichtechtheit schlechter. The single-layer pigment-coated thin-film film according to the invention based on "pre-impregnate" of 45 g / m 2 showed in the laboratory test compared to conventional furniture pre-impregnates of 53 g / m 2 better printability in gravure printing and a higher gloss after coating with aqueous acrylate lacquer (9 g / m 2 varnish application) on the pigmented paper top as well as a faster knocking away of the aqueous laminating adhesives (based on acrylate or urea) on the back of the paper (see also water absorption values). From this it can be concluded that the paper according to the invention can be better bonded / laminated to the fiberboard. The somewhat poorer flatness should not have a negative impact on the laminating process. In contrast, the coverage of the fiberboard is somewhat poorer due to the lower ash content and the slightly lower opacity associated with it. In addition, the light fastness is worse.

Gegenüber herkömmlichen Japanfolien zeigt die erfindungsgemäße Dünnschichtfolie eine leicht bessere Bedruckbarkeit im Tiefdruck, einen bedeutend besseren Lackstand und ein schnelleres Wegschlagen des Klebstoffes auf der Papierrückseite (verbesserte Verklebbarkeit/Kaschierbarkeit).Compared to conventional Japanese films, the thin film according to the invention a slightly better Printability in gravure, a significantly better one Paint level and faster knocking away of the adhesive on the back of the paper (improved stickability / laminability).

Außerdem ist die Abdeckung der Faserplatte aufgrund der etwas höheren Opazität des erfindungsgemäßen Papiers besser. Die Lichtechtheit ist gegenüber der herkömmlichen Japanfolie aufgrund der Oberflächenpigmentierung leicht besser.In addition, the cover of the fiberboard is due to the somewhat higher opacity of the paper according to the invention better. The light fastness is compared to the conventional one Japanese film light due to the surface pigmentation better.

Beispiel 2Example 2

Es wurde analog Beispiel 1 ein weißes (gebleichtes) Rohpapier von 47 g/m2 mit einer Faserstoffzusammensetzung von 80 % Eukalyptus- und 20 % Kiefernsulfat-Zellstoff und mit einem Füllstoffeinsatz von 50 kg Titandioxid pro t Faserstoff auf der Papiermaschine hergestellt und analog Beispiel 1 unter Anwendung der "Differential Coating"-Fahrweise einseitig mit einem Pigmentstrich (Clay) versehen sowie auf der Rückseite imprägniert.Analogously to Example 1, a white (bleached) base paper of 47 g / m 2 with a fiber composition of 80% eucalyptus and 20% pine sulfate pulp and with a filler insert of 50 kg titanium dioxide per ton of fiber was produced on the paper machine and analogously to Example 1 Apply the pigment coating (clay) on one side using the "differential coating" method and impregnate on the back.

Das Papier wurde anschließend on line unter Verwendung eines Softkalanders geglättet.The paper was then used online of a soft calender smoothed.

Beispiel 3Example 3

Analog Beispiel 1 und 2 wurde ein weißes (gebleichtes) Rohpapier von 80 g/m2 mit einer Faserstoffzusammensetzung von 80 % Eukalyptus- und 20 % Kiefernsulfat-Zellstoff und mit einem Füllstoffeinsatz von 250 kg Clay und 50 kg Talkum pro t Faserstoff auf der Papiermaschine hergestellt. Im Gegensatz zu den Papieren gemäß Beispielen 1 und 2 wurde der Papierstoff in der Masse voll geleimt (Harzleimung), um die Penetration der anschließend mittels "Differential Coating"-Fahrweise aufgebrachten Imprägnier- bzw. Beschichtungsmassen in das Papiergefüge zu begrenzen.Analogous to Examples 1 and 2, a white (bleached) base paper of 80 g / m 2 with a fiber composition of 80% eucalyptus and 20% pine sulfate pulp and with a filler insert of 250 kg clay and 50 kg talc per t fiber was used on the paper machine produced. In contrast to the papers according to Examples 1 and 2, the paper stock was fully sized in size (resin size) in order to limit the penetration into the paper structure of the impregnating or coating compositions subsequently applied by means of the “differential coating” method.

Im Gegensatz zu den Beispielen 1 und 2 wurde die einseitige Pigmentbeschichtung der Papierbahn mit einer Mischung aus Acrylat-Latex und Harnstoffharz im Verhältnis 70 : 30 (fest), der 20 % Titandioxid, bezogen auf die Gesamtmenge Latex/Harnstoffharz (fest), zugesetzt wurden, vorgenommen.In contrast to Examples 1 and 2, the one-sided pigment coating of the paper web with a Mixture of acrylic latex and urea resin in the Ratio 70:30 (solid) of 20% titanium dioxide on the total amount of latex / urea resin (solid) added were made.

Die Rückseite der Papierbahn wurde dagegen mit einer Latex/Kunstharzmischung analog den Beispielen 1 und 2 teilimprägniert. Die Tränkharzaufnahme betrug dadurch nur 5 % des Rohpapiergewichtes.The back of the paper web was, however, with a Latex / synthetic resin mixture analogous to Examples 1 and 2 partially impregnated. The impregnation resin absorption was therefore only 5% of the raw paper weight.

Dieses als Druckbasispapier bezeichnete einseitig leicht pigmentierte Papier auf der Basis von "Vorimprägnat" wurde der erfindungsgemäßen einseitig pigmentgestrichenen und rückseitig imprägnierten Dünnschichtfolie analog Beispiel 2 sowie üblichen 45 g/m2-Japanpapieren sowie Möbelvorimprägnaten von 53 g/m2 vergleichend gegenübergestellt.This paper, which is referred to as printing base paper and is slightly pigmented on the basis of "pre-impregnate", was compared with the thin-film film according to the invention, which was pigment-coated on one side and impregnated on the back as in Example 2, as well as conventional 45 g / m 2 Japanese paper and furniture pre-impregnates of 53 g / m 2 .

Wiederum erweist sich die erfindungsgemäße einseitig pigmentgestriche Dünnschichtfolie auf der Basis von Vorimprägnat den anderen Papieren qualitativ hinsichtlich folgender Eigenschaftsmerkmale überlegen:

  • beste Bedruckbarkeit im Tiefdruck
  • höchster Lackstand
  • schnellstes Wegschlagen des Kaschierklebstoffes auf der Papierrückseite, d. h. beste Verklebbarkeit/Kaschierbarkeit mit anderen Materialien.
Again, the one-sided pigment-coated thin-film film based on pre-impregnate proves qualitatively superior to the other papers in terms of the following property characteristics:
  • best printability in gravure printing
  • highest paint level
  • Fastest knocking away of the lamination adhesive on the back of the paper, ie best bondability / lamination with other materials.

Dagegen fallen Opazität und Lichtechtheit gegenüber üblichen Vorimprägnaten und dem Druckbasispapier schlechter aus.In contrast, opacity and light fastness are compared usual prepregs and the printing base paper worse out.

Dabei muß bezüglich Opazität auf den Einfluß der höheren flächenbezogenen Masse von Druckbasispapier verwiesen werden.The opacity must influence the influence of the higher mass per unit area of printing base paper will.

Damit verbindet die erfindungsgemäße Dünnschichtfolie sowohl die positiven Eigenschaften herkömmlicher Vorimprägnate und als auch diejenigen der Japanpapiere.This connects the thin-film film according to the invention both the positive properties of conventional Pre-impregnated and as well as those of the Japanese papers.

Beispiel 4Example 4

Entsprechend Beispiel 1 wurde ein hellbraun eingefärbtes Rohpapier mit einem Flächengewicht von etwa 45 g/m2 hergestellt, wobei die Färbung nicht mit einem Flüssigfarbstoff sondern durch Eisenoxidpigmente erfolgte.According to Example 1, a light brown colored base paper with a weight per unit area of about 45 g / m 2 was produced, the coloring not being carried out using a liquid dye but using iron oxide pigments.

Im Gegensatz zu den Beispielen 1 bis 3 wurde die einseitige Pigmentbeschichtung der Papierbahn mit einer Mischung von Styrol/Butadien-Latex und Harnstoffharz im Verhältnis 25:75, auf den Feststoffgehalt bezogen, der die doppelte Menge an Clay (fest), bezogen auf die Gesamtmenge Latex/Harnstoff (fest) zugesetzt wurde, vorgenommen.In contrast to Examples 1 to 3, the one-sided pigment coating of the paper web with a Mixture of styrene / butadiene latex and urea resin in the Ratio 25:75, based on the solids content of the twice the amount of clay (solid) based on the Total amount of latex / urea (solid) was added, performed.

Die Rückseite der Papierbahn wurde dagegen mit der gleichen Latex/Kunstharzmischung imprägniert wie in den Beispielen 1 bis 3. Die Tränkharzaufnahme betrug 30% des Rohpapiergewichts. The back of the paper web was, however, with the impregnated with the same latex / synthetic resin mixture as in the Examples 1 to 3. The impregnation resin absorption was 30% of the Raw paper weight.

Im Vergleich zu den gemäß Beispielen 1 und 2 hergestellten Papieren zeichnete sich das Papier durch eine höhere Lichtechtheit (Note 3-4), höhere Opazität (93%) und höhere Sprödigkeit mit einem um etwa 30% niedrigeren Durchreißfaktor aus.In comparison to those according to Examples 1 and 2 manufactured paper, the paper stood out higher lightfastness (grade 3-4), higher opacity (93%) and higher brittleness with a 30% lower tear-through factor.

Beispiel 5Example 5

Es wurde entsprechend Beispiel 4 ein gefärbtes Rohpapier eines Flächengewichts von etwa 45 g/m2 hergestellt. Im Gegensatz zu Beispiel 4 wurde jedoch die einseitige Pigmentbeschichtung der Papierbahn mit einer Mischung von Acryl-Latex und Harnstoffharz im Verhältnis 90:10 (fest), der die etwa doppelte Menge an Clay (fest) zugesetzt wurde, durchgeführt. Die Rückseite der Papierbahn wurde mit der gleichen Latex/Kunstharzmischung wie in den Beispielen 1 und 2 imprägniert.A colored base paper with a basis weight of about 45 g / m 2 was produced in accordance with Example 4. In contrast to Example 4, however, the one-sided pigment coating of the paper web was carried out with a mixture of acrylic latex and urea resin in a ratio of 90:10 (solid), to which about twice the amount of clay (solid) was added. The back of the paper web was impregnated with the same latex / synthetic resin mixture as in Examples 1 and 2.

Die Tränkharzaufnahme betrug etwa 10% des Rohpapiergewichts.The impregnation resin absorption was about 10% of the Raw paper weight.

Im Vergleich zu den gemäß Beispielen 1, 2 und 4 hergestellten Papieren weist das Produkt eine leicht bessere Bedruck- und Lackierbarkeit und höhere Elastizität auf.

Figure 00130001
Figure 00140001
Compared to the papers produced according to Examples 1, 2 and 4, the product has slightly better printability and varnishability and higher elasticity.
Figure 00130001
Figure 00140001

Claims (5)

Dünnschichtfolie aus einem Rohpapier mit Pigmentstrich auf der Druck- oder Lackierseite des Rohpapiers, die ausgehend von der dem Pigmentstrich gegenüberliegenden Seite des Rohpapiers mit einem Tränkharz imprägniert ist.Thin film from a raw paper with Pigment line on the printing or painting side of the Base paper based on that of the pigment coat opposite side of the base paper with a Impregnation resin is impregnated. Dünnschichtfolie nach Anspruch 1, dadurch gekennzeichnet, daß der Pigmentstrich in einer Dicke von 1 bis 8 g/m2 ausgebildet ist.Thin-film film according to claim 1, characterized in that the pigment coat is formed in a thickness of 1 to 8 g / m 2 . Dünnschichtfolie nach Anspruch 1 und 2, dadurch gekennzeichnet, daß das Verhältnis von Pigment zu Bindemittel 1 : 0,05 bis 1 : 2,00, bezogen auf den Feststoff, beträgt.Thin-film sheet according to Claims 1 and 2, characterized in that the ratio of pigment to binder is 1: 0.05 to 1: 2.00, based on the solid. Dünnschichtfolie nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß der Pigmentstrich 1 bis 30 Gew.% Melaminharz, Harnstoffharz, Phenolharz oder Glyoxalharz enthält.Thin-film film according to Claims 1 to 3, characterized in that the pigment coating contains 1 to 30% by weight of melamine resin, urea resin, phenolic resin or glyoxal resin. Dünnschichtfolie nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Harzaufnahme des Rohpapiers, bezogen auf den Feststoffanteil, zwischen 5 und 30 % des Rohpapiergewichts beträgt.Thin-film film according to one of claims 1 to 4, characterized in that the resin absorption of the base paper, based on the solids content, is between 5 and 30% of the base paper weight.
EP19980106207 1997-04-12 1998-04-04 One-side impregnated printing paper support Expired - Lifetime EP0870872B1 (en)

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DE19715268 1997-04-12
DE19715268A DE19715268A1 (en) 1997-04-12 1997-04-12 Laminating sheet, e.g. for chipboard laminates
DE19740638 1997-09-16
DE19740638 1997-09-16

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WO2001021892A1 (en) * 1999-09-21 2001-03-29 Ernst Heller Method for processing paper strips, and paper to be impregnated with synthetic resins
US6887584B2 (en) 1999-03-12 2005-05-03 Premark Rwp Holdings, Inc. System and method for two sided sheet treating
EP2139679B2 (en) † 2007-04-25 2017-05-31 Hülsta-Werke Hüls GmbH & CO. KG Method for the production of a planar, printable semifinished product for a planar building component, particularly for floor, wall, ceiling, and/or furniture uses
US9903072B2 (en) 2011-09-15 2018-02-27 Imerys Usa, Inc. Compositions comprising kaolin treated with a styrene-based polymer and related methods
DE102013007236B4 (en) 2012-12-07 2018-03-01 Mondi Gronau Gmbh Top layer with outside film layer of an elastic plastic and plate with a plate body, which is connected to the cover layer

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ITMI20022737A1 (en) * 2002-12-20 2004-06-21 Gruppo Cordenons Spa PAPER SHEET MATERIAL WITH APPEARANCE AND EFFECT AL
US20070001558A1 (en) * 2005-06-30 2007-01-04 Bush Industries, Inc. Digitally printed furniture and methods for manufacture thereof
EP2222919B2 (en) * 2007-12-21 2016-01-13 Schoeller Technocell GmbH & Co. KG Base paper for decorative coating materials
RU2608416C2 (en) 2011-08-26 2017-01-18 Сералок Инновейшн Аб Method of making multilayer article and floor panel
US11090972B2 (en) 2015-12-21 2021-08-17 Valinge Innovation Ab Method to produce a building panel and a semi finished product
CN115717342B (en) * 2022-11-17 2023-12-22 万邦特种材料股份有限公司 Manufacturing method of single-sided colored forming paper

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US6887584B2 (en) 1999-03-12 2005-05-03 Premark Rwp Holdings, Inc. System and method for two sided sheet treating
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EP2139679B2 (en) † 2007-04-25 2017-05-31 Hülsta-Werke Hüls GmbH & CO. KG Method for the production of a planar, printable semifinished product for a planar building component, particularly for floor, wall, ceiling, and/or furniture uses
US9903072B2 (en) 2011-09-15 2018-02-27 Imerys Usa, Inc. Compositions comprising kaolin treated with a styrene-based polymer and related methods
DE102013007236B4 (en) 2012-12-07 2018-03-01 Mondi Gronau Gmbh Top layer with outside film layer of an elastic plastic and plate with a plate body, which is connected to the cover layer

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DE59806662D1 (en) 2003-01-30
AU6075598A (en) 1998-10-15
AU728365B2 (en) 2001-01-11
PL325772A1 (en) 1998-10-26
CN1125205C (en) 2003-10-22
CN1196421A (en) 1998-10-21
ES2185076T3 (en) 2003-04-16
ATE230048T1 (en) 2003-01-15
TW402651B (en) 2000-08-21
KR19980081326A (en) 1998-11-25
CA2234595A1 (en) 1998-10-12
BR9801042A (en) 1999-09-21
US6001490A (en) 1999-12-14
PL191900B1 (en) 2006-07-31
JPH10292291A (en) 1998-11-04

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