EP2066842B1 - Wallpaper substrate and method for the production thereof - Google Patents

Wallpaper substrate and method for the production thereof Download PDF

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Publication number
EP2066842B1
EP2066842B1 EP07803541A EP07803541A EP2066842B1 EP 2066842 B1 EP2066842 B1 EP 2066842B1 EP 07803541 A EP07803541 A EP 07803541A EP 07803541 A EP07803541 A EP 07803541A EP 2066842 B1 EP2066842 B1 EP 2066842B1
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EP
European Patent Office
Prior art keywords
wallcover
backing
cellulose
fibrous
top side
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Revoked
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EP07803541A
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German (de)
French (fr)
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EP2066842A1 (en
Inventor
Frank Fetkenheuer
Marco Menz
Michael Nogowski
Thomas Ullrich
Horst Leupold
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.)
Glatfelter Dresden GmbH and Co KG
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Dresden Papier GmbH
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Application filed by Dresden Papier GmbH filed Critical Dresden Papier GmbH
Priority to PL07803541T priority Critical patent/PL2066842T3/en
Publication of EP2066842A1 publication Critical patent/EP2066842A1/en
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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
    • D21H27/20—Flexible structures being applied by the user, e.g. wallpaper
    • 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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • 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
    • 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
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate
    • 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
    • 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
    • D21H27/30—Multi-ply
    • D21H27/38—Multi-ply at least one of the sheets having a fibrous composition differing from that of other sheets

Definitions

  • the invention relates to a wallpaper substrate for a dry peelable wallpaper with minimal wet stretch.
  • This consists of a multilayer web with an underside facing the wall when using the wallpaper and a top facing the room when the wallpaper is used.
  • a fibrous cellulosic fibrous base layer and synthetic fibers In between, in the bottom-to-top direction, there are disposed a fibrous cellulosic fibrous base layer and synthetic fibers and a fibrous top layer of a cellulosic non-fiber synthetic pulp mixture.
  • the invention also relates to a method for producing a wallpaper substrate for a dry peelable wallpaper with minimal wet stretch, in which a multilayer web is produced with an underside facing the wall when the wallpaper is used and an upper side facing the room when the wallpaper is used.
  • a fibrous lower layer of a pulp mixture of cellulose and synthetic fibers and a fibrous upper layer of a synthetic fiber-free cellulose fiber mixture are joined together.
  • a wallpaper substrate From the DE 27 14 206 A1 is a wallpaper substrate and a process for its preparation is known which consists of a lower layer, in addition to cellulose fibers and thermoplastic Synthetic fibers contains and an upper layer containing only cellulose fibers known. Both layers are glued together by lamination using glue. In addition, the process is conducted so that the synthetic fibers fuse together. This solution is aimed primarily at a good connection of the layers and a good removability of the wallpaper in the case of renovation. Direct printing of this wallpaper substrate is not provided.
  • a method and a wallpaper substrate of the aforementioned type is also known from EP 0118 221 B1 known.
  • a lower phase containing both cellulose and synthetic fibers and an upper cellulosic fiber-containing upper phase are bonded together.
  • a direct printing of the substrate is not provided here. Rather, a vinyl layer is applied to the top, which is to serve the subsequent printing.
  • the composition of the upper phase serves here for better adhesion of this vinyl layer.
  • the US-A-4460643 refers to a wallpaper substrate.
  • This wallpaper substrate is intended for the production of a vinyl wallpaper.
  • a vinyl wallpaper consists of a wallpaper substrate to which a smooth vinyl layer is applied.
  • This vinyl layer has a sufficiently smooth surface on which then, for example, a high-quality print can be applied.
  • the vinyl layer can after the US-A-4460643 be applied by means of two alternative methods, namely by means of a coating from the liquid phase or by means of a thermal lamination process.
  • the wallpaper substrate consists of a multi-phase structure having an upper phase and a lower phase.
  • the upper phase is free of synthetic polyester fibers, but it probably has synthetic fibers, namely up to 90% by weight of a meltable thermoplastic fiber material, for example consisting of polyolefin fibers.
  • This upper layer is designed so that it forms a good bond with the vinyl layer.
  • the lower phase In US-A-4460643 consists of a pulp mixture based on cellulose and synthetic fibers.
  • a dry strippable wallpaper substrate is described.
  • two paper webs are glued together so that they can be separated in the glued state by applying a tensile force. Dazul is set a deliberately weak bond between the two paper webs.
  • such a wallpaper substrate has the same high wet stretch as other paper wallpapers, as determined by the composition of the material and is not changed by the two-ply.
  • the EP-A-4296162 discloses a wallpaper having a lower layer of a cellulosic material (paper). On top of that is an aluminum layer and on top of it an upper layer of opaque vinyl.
  • the object of the invention is now to provide a wallpaper substrate and a method for its production, with a direct, almost error-free printing of the top in good quality in particular by means of direct printing and in this case in particular by intaglio is possible and which is inexpensive to produce.
  • a printability should be achieved by minimizing the number of imperfections, so-called missing dots, in the printout.
  • the problem is solved on the arrangement side, that the lower layer and the upper layer are matted together by Gautschen, and the upper side satin and is formed by direct printing, especially for gravure, with a maximum of 1 missing dot per cm 2 printable.
  • a multi-layered wallpaper substrate which from a bottom, the bottom facing the wall, consisting of a cellulose and synthetic fiber blend, and an upper facing in the space top, consisting of a cellulose fiber layer, with a top applied pigment coating, which was calendered, prepared and in this way and Way an advantageous surface structure is created, ensures a very good printability in gravure printing with a small number of defects.
  • a lower functional layer is applied to the underside.
  • this functional layer for example, a curling of the wallpaper can be prevented.
  • a further embodiment according to the invention provides that the fibers based on cellulose consist of 50 to 100% of chemically produced fibers and may contain 0 to 50% of mechanically treated fibers and / or 0 to 50% of recovered paper fibers in each case in a supplementary proportion.
  • the possibility of adding mechanically processed fibers and / or recovered paper fibers on the one hand improves the range of variation in the structure and, on the other hand, enables cost-effective production.
  • a pigment coating forming the upper side is applied to the upper layer.
  • the pigment coating contains inorganic, in particular mineral constituents, since these constituents bring about further smoothing with uniform roughness and good ink coverage.
  • Preferred mineral materials for the pigment coating are mixed or individually represented by caolins, titanium dioxide, carbonates, talc and special pigments.
  • the functional layer has a grammage of 0 to 5 g / m 2
  • the upper layer has a grammage of 5 to 40 g / m 2
  • the pigment coating a grammage of 5 to 35 g / m 2
  • the lower layer has a grammage corresponding to the total grammage of the substrate to be adjusted minus the grammages of the functional layer, the upper layer and the pigment stroke.
  • the wallpaper substrate has a total grammage of 60 to 180 g / m 2 .
  • the process-side solution of the problem provides that the lower and upper layers, preferably by means of wires, each made of a cellulosic suspension or a cellulosic suspension with admixing synthetic fibers for the lower layer, are formed and then joined together by Gautschen and the top by means of satin with a high print quality suitable for a direct printing, in particular a gravure printing is created and that all processes are carried out at a temperature below the melting temperature of the synthetic fibers.
  • the adjustment of the temperature prevents crosslinking of the synthetic fibers, so that the wallpaper substrate retains its flexible basic structure.
  • the satin finish for which the pure cellulose structure of the top is very well suited, achieves a very even surface, which helps avoid the creation of missing dots in direct printing.
  • the adhesion and processing properties of the wallpaper can be influenced.
  • it can be used to prevent curling.
  • a pigment coating which forms the upper side is applied in situ, which on the one hand serves to pre-color the wallpaper and on the other hand further improves the surface structure.
  • This pigment coating may conveniently be applied directly during production, thus avoiding an additional treatment step which would require additional handling of the wallpaper substrate rolls.
  • a pigment coating forming the upper side is applied separately to the side of the upper layer facing the surface.
  • the composite is able to withdraw liquid from the pigment coating very quickly, as a result of which it gets into a dry state more quickly.
  • the satinization may be carried out in situ or separately and in both cases by means of a calender.
  • the wallpaper substrate 1 has an underside 2 facing the wall when the wallpaper is used and an upper side 3 pointing into the room when the wallpaper is used.
  • a lower functional layer 4 a fibrous lower layer 5 of a pulp mixture of cellulose and synthetic fibers and a fibrous upper layer 6 of a synthetic fiber-free cellulose fiber mixture are arranged.
  • the lower one Layer 5 and the upper layer 6 are matted together by Gautschen.
  • a top 3 forming pigment coating 7 is applied on the upper layer 6 .
  • the top 3 is satined and designed for printing by direct printing, especially for gravure printing, almost error-free.
  • the wallpaper substrate of the invention is produced on a Duplexlangsiebmaschine. It is quite common to produce both layers 5 and 6 from a same pulp mixture of cellulose and synthetic fibers. In contrast, according to the invention, the synthetic fibers are not dosed in the upper layer 6.
  • the upper layer 6 is the position which shows after wallpapering the finished wallpaper to the inside of the room.
  • the surface 3 thus produced has a structure as it is required for the almost error-free printability in gravure, especially for the small number of defects, so-called missing dots in the expression.
  • a functional layer 4 can be applied to the underside of the lower layer to maintain certain properties, such as anti-curling, fiber adhesion and the like.
  • a wallpaper substrate 1 is specified, which satisfies the highest demands made by the gravure printing.
  • This wallpaper substrate 1 thus has properties as it has provided for a gravure conventional wallpaper paper.
  • the wallpaper substrate 1 according to the invention was in a grammage range made of 130 g / m 2 .
  • the upper layer was made of 100% cellulose fibers and had a grammage of 35 g / m 2.
  • the lower web consisted of a nonwoven wallpaper (cellulose and synthetic fiber mixture) corresponding to the state of the art with a surface weight of 73 g / m 2 .
  • starch was applied in a basis weight range of 0.3 g / m 2 for anticurling treatment.
  • the inorganic pigment sting was applied in a basis weight range of 22 g / m 2 .
  • the wallpaper substrate 1 according to the invention has a surface roughness measured according to Parker Print Surf (DIN ISO 8791-4) of ⁇ 2.0 ⁇ m, in particular ⁇ 1.7 ⁇ m.
  • Papers which are currently used in rotogravure for the particular application in question usually have a Parker Print Surf value of ⁇ 1.7 ⁇ m.
  • test print in the gravure printing process carried out under industrial conditions showed a closed print image without defects (missing dots).

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  • Paper (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to a wallpaper substrate for a wallpaper that can be peeled in a dry manner, has a minimal wet expansion and consists of a multilayer strip with an upper and lower side, between which are arranged a fibrous lower layer of a fibre mixture on cellulose basis and synthetic fibers and a fibrous upper layer of a fibre mixture on cellulose basis and free of synthetic fibres. The invention also relates to a method for producing such a wallpaper substrate. The aim of the invention is to allow a nearly faultless printing of the upper side with high quality, particularly by direct printing, and at low cost. A printability is to be achieved by virtue of the fact that the number of imperfections in the print is reduced to a minimum. The solution provided according to the invention is that the lower and upper layer are felted with one another by couching, the upper side is satinated and configured for direct printing, especially for gravure printing.

Description

Die Erfindung betrifft ein Tapetensubstrat für eine trocken abziehbare Tapete mit minimaler Nassdehnung. Dieses besteht aus einer mehrschichtigen Bahn mit einer beim Einsatz der Tapete zur Wand weisenden Unterseite und einer beim Einsatz der Tapete in den Raum weisenden Oberseite. Dazwischen sind in der Richtung von Unterseite zu Oberseite eine faserige untere Lage aus einem Faserstoffgemisch auf Zellulosebasis und Synthesefasern und eine faserige obere Lage aus einem synthesefaserfreien Faserstoffgemisch auf Zellulosebasis angeordnet.The invention relates to a wallpaper substrate for a dry peelable wallpaper with minimal wet stretch. This consists of a multilayer web with an underside facing the wall when using the wallpaper and a top facing the room when the wallpaper is used. In between, in the bottom-to-top direction, there are disposed a fibrous cellulosic fibrous base layer and synthetic fibers and a fibrous top layer of a cellulosic non-fiber synthetic pulp mixture.

Die Erfindung betrifft auch ein Verfahren zur Herstellung eines Tapetensubstrates für eine trocken abziehbare Tapete mit minimaler Nassdehnung, bei dem eine mehrschichtige Bahn mit einer beim Einsatz der Tapete zur Wand weisenden Unterseite und einer beim Einsatz der Tapete in den Raum weisenden Oberseite, erzeugt wird. Dabei werden eine faserige untere Lage aus einem Faserstoffgemisch aus Zellulose- und Synthesefasern und eine faserige obere Lage aus einem synthesefaserfreien Zellulosefasergemisch miteinander verbunden.The invention also relates to a method for producing a wallpaper substrate for a dry peelable wallpaper with minimal wet stretch, in which a multilayer web is produced with an underside facing the wall when the wallpaper is used and an upper side facing the room when the wallpaper is used. In this case, a fibrous lower layer of a pulp mixture of cellulose and synthetic fibers and a fibrous upper layer of a synthetic fiber-free cellulose fiber mixture are joined together.

Aus der DE 27 14 206 A1 ist ein Tapetensubstrat und ein Verfahren zu dessen Herstellung bekannt, das aus einer unteren Schicht, die neben Zellulosefasern auch thermoplastische Synthesefasern enthält und eine oberen Schicht, die nur Zellulosefasern enthält, bekannt. Beide Schichten sind durch Laminieren unter Einsatz von Klebstoff miteinander verklebt. Außerdem wird der Prozess so geführt, dass die Synthesefasern miteinander verschmelzen. Diese Lösung ist in erster Linie auf eine gute Verbindung der Schichten und auf eine gute Ablösbarkeit der Tapete im Renovierungsfalle gerichtet. Ein direktes Bedrucken dieses Tapetensubstrats ist nicht vorgesehen.From the DE 27 14 206 A1 is a wallpaper substrate and a process for its preparation is known which consists of a lower layer, in addition to cellulose fibers and thermoplastic Synthetic fibers contains and an upper layer containing only cellulose fibers known. Both layers are glued together by lamination using glue. In addition, the process is conducted so that the synthetic fibers fuse together. This solution is aimed primarily at a good connection of the layers and a good removability of the wallpaper in the case of renovation. Direct printing of this wallpaper substrate is not provided.

Ein Verfahren und ein Tapetensubstrat der eingangs genannten Art ist auch aus der EP 0118 221 B1 bekannt. Hierbei wird eine untere Phase, die sowohl Zellulose- als auch Synthesefasern enthält, und eine obere nur Zellulosefasern enthaltende obere Phase miteinander verbunden. Ein direktes Bedrucken des Substrates ist hierbei nicht vorgesehen. Vielmehr wird auf die Oberseite noch eine Vinylschicht aufgebracht, die dem späteren Bedrucken dienen soll. Die Zusammensetzung der oberen Phase dient hier der besseren Haftung dieser Vinylschicht.A method and a wallpaper substrate of the aforementioned type is also known from EP 0118 221 B1 known. Here, a lower phase containing both cellulose and synthetic fibers and an upper cellulosic fiber-containing upper phase are bonded together. A direct printing of the substrate is not provided here. Rather, a vinyl layer is applied to the top, which is to serve the subsequent printing. The composition of the upper phase serves here for better adhesion of this vinyl layer.

Die US-A-4460643 bezieht sich auf ein Tapetensubstrat. Dieses Tapetensubstrat ist für die Herstellung einer Vinyltapete vorgesehen. Nach dem allgemeinen Fachwissen besteht eine Vinyltapete aus einem Tapetensubstrat, auf das eine glatte Vinylschicht aufgebracht wird. Diese Vinylschicht weist eine hinreichend glatte Oberfläche auf, auf die dann beispielsweise auch ein hochqualitativer Druck aufgebracht werden kann.The US-A-4460643 refers to a wallpaper substrate. This wallpaper substrate is intended for the production of a vinyl wallpaper. According to general knowledge, a vinyl wallpaper consists of a wallpaper substrate to which a smooth vinyl layer is applied. This vinyl layer has a sufficiently smooth surface on which then, for example, a high-quality print can be applied.

Die Vinylschicht kann nach der US-A-4460643 mittels zweier alternativer Verfahren aufgebracht werden, nämlich mittels einer Beschichtung aus der Flüssigphase oder mittels eines thermischen Laminierungsprozesses.The vinyl layer can after the US-A-4460643 be applied by means of two alternative methods, namely by means of a coating from the liquid phase or by means of a thermal lamination process.

Zum Aufbringen der Vinylschicht besteht das Tapetensubstrat aus einer Mehrphasenstruktur, mit einer oberen Phase und einer unteren Phase. Die obere Phase ist frei von synthetischen Polyesterfasern, wohl aber weist sie sehr wohl synthetische Fasern, nämlich bis zu 90 Gew.-% eines schmelzbaren thermoplastischen Fasermateriales, beispielsweise bestehend aus Polyolefinfasern auf. Diese obere Schicht ist dabei so konzipiert, dass sie eine gute Bindung mit der Vinylschicht eingeht.For applying the vinyl layer, the wallpaper substrate consists of a multi-phase structure having an upper phase and a lower phase. The upper phase is free of synthetic polyester fibers, but it probably has synthetic fibers, namely up to 90% by weight of a meltable thermoplastic fiber material, for example consisting of polyolefin fibers. This upper layer is designed so that it forms a good bond with the vinyl layer.

Die untere Phase In US-A-4460643 besteht aus einem Faserstoffgemisch auf Zellulosebasis und Synthesefasern.The lower phase In US-A-4460643 consists of a pulp mixture based on cellulose and synthetic fibers.

In der DE-A-2148423 wird ein trocken abziehbares Tapetensubstrat beschrieben. Dabei werden zwei Papierbahnen so miteinander verklebt, dass sie im aufgeklebten Zustand durch Aufbringen einer Zugkraft voneinander getrennt werden können. Dazul wird eine bewusst schwache Bindung zwischen den beiden Papierbahnen eingestellt. Neben der Trockenabziehbarkeit weist ein solches Tapetensubstrat jedoch die selbe hohe Nassdehnung wie andere Papiertapeten auf, da durch die Materialzusammensetzung bestimmt und durch die Zweilagigkeit nicht verändert wird.In the DE-A-2148423 a dry strippable wallpaper substrate is described. In this case, two paper webs are glued together so that they can be separated in the glued state by applying a tensile force. Dazul is set a deliberately weak bond between the two paper webs. In addition to the dry peelability, however, such a wallpaper substrate has the same high wet stretch as other paper wallpapers, as determined by the composition of the material and is not changed by the two-ply.

Die EP-A-4296162 offenbart eine Tapete, welche eine untere Schicht aus einen Zellulosematerial (Papier) aufweist. Darauf ist eine Aluminiumschicht und auf dieser eine obere Schicht aus opaken Vinyl angeordnet.The EP-A-4296162 discloses a wallpaper having a lower layer of a cellulosic material (paper). On top of that is an aluminum layer and on top of it an upper layer of opaque vinyl.

Die Aufgabe der Erfindung besteht nunmehr darin, ein Tapetensubstrat und ein Verfahren zu dessen Herstellung anzugeben, mit dem ein direktes, nahezu fehlerfreies Bedrucken der Oberseite in guter Qualität insbesondere mittels Direktdruck und hierbei insbesondere mittels Tiefdruck ermöglicht wird und das kostengünstig herstellbar ist. Dabei soll insbesondere eine Bedruckbarkeit dadurch erreicht werden, dass die Anzahl an Fehlstellen, so genannten missing dots, im Ausdruck minimiert wird.The object of the invention is now to provide a wallpaper substrate and a method for its production, with a direct, almost error-free printing of the top in good quality in particular by means of direct printing and in this case in particular by intaglio is possible and which is inexpensive to produce. In particular, a printability should be achieved by minimizing the number of imperfections, so-called missing dots, in the printout.

Die Aufgabe wird anordnungsseitig dadurch gelöst, dass die untere Lage und die obere Lage durch Gautschen miteinander verfilzt sind, und die Oberseite satiniert und für durch Direktdruck, insbesondere für Tiefdruck, mit maximal 1 missing dot pro cm2 bedruckbar ausgebildet ist.The problem is solved on the arrangement side, that the lower layer and the upper layer are matted together by Gautschen, and the upper side satin and is formed by direct printing, especially for gravure, with a maximum of 1 missing dot per cm 2 printable.

Ein aus mehreren Lagen aufgebautes Tapetensubstrat, welches aus einer unteren, der zur Wand weisenden Unterseite, bestehend aus einem Zellulose- und Synthesefasergemisch, und einer oberen in den Raum weisenden Oberseite, bestehend aus einer Zellulosefaserschicht, mit einem auf der Oberseite aufgetragenen Pigmentstrich, welcher satiniert wurde, hergestellt und auf diese Art und Weise eine vorteilhafte Oberflächenstruktur geschaffen wird, gewährleistet eine sehr gute Bedruckbarkeit im Tiefdruck mit einer geringen Anzahl an Fehlstellen.A multi-layered wallpaper substrate, which from a bottom, the bottom facing the wall, consisting of a cellulose and synthetic fiber blend, and an upper facing in the space top, consisting of a cellulose fiber layer, with a top applied pigment coating, which was calendered, prepared and in this way and Way an advantageous surface structure is created, ensures a very good printability in gravure printing with a small number of defects.

In einer Ausgestaltung der Erfindung ist vorgesehen, dass auf der Unterseite eine untere Funktionsschicht aufgebracht ist. Mittels dieser Funktionsschicht kann etwa ein Curling der Tapete verhindert werden.In one embodiment of the invention, it is provided that a lower functional layer is applied to the underside. By means of this functional layer, for example, a curling of the wallpaper can be prevented.

Ein weitere erfindungsgemäße Ausgestaltung sieht vor, dass die Fasern auf Zellulosebasis aus 50 bis 100% chemisch hergestellten Fasern bestehen und jeweils in ergänzendem Anteil 0 bis 50% mechanisch aufbereiteter Fasern und/oder 0 bis 50% aus Altpapier gewonnene Fasern enthalten können. Durch die Möglichkeit des Zusatzes von mechanisch aufbereiten Fasern und/oder Altpapierfasern wird einerseits die Variationsbreite in der Struktur verbessert und andererseits eine kostengünstige Herstellung ermöglicht.A further embodiment according to the invention provides that the fibers based on cellulose consist of 50 to 100% of chemically produced fibers and may contain 0 to 50% of mechanically treated fibers and / or 0 to 50% of recovered paper fibers in each case in a supplementary proportion. The possibility of adding mechanically processed fibers and / or recovered paper fibers on the one hand improves the range of variation in the structure and, on the other hand, enables cost-effective production.

Zur Verbesserung der Bedruckbarkeit ist in einer Ausgestaltung der Erfindung vorgesehen, dass auf der oberen Lage ein die Oberseite bildender Pigmentstrich aufgebracht ist.To improve the printability, it is provided in one embodiment of the invention that a pigment coating forming the upper side is applied to the upper layer.

Dabei ist es vorteilhaft, dass der Pigmentstrich anorganische, insbesondere mineralische Bestandteile enthält, da diese Bestandteile eine weitere Glättung bei gleichmäßiger Rauhigkeit und eine gute Farbdeckung mit sich bringen.It is advantageous that the pigment coating contains inorganic, in particular mineral constituents, since these constituents bring about further smoothing with uniform roughness and good ink coverage.

Bevorzugte mineralische Materialien für den Pigmentstrich stellen Caoline, Titandioxid, Carbonate, Talkum und Sonderpigmente gemischt oder einzeln dar.Preferred mineral materials for the pigment coating are mixed or individually represented by caolins, titanium dioxide, carbonates, talc and special pigments.

In einer weiteren bevorzugten Ausgestaltung der Erfindung ist vorgesehen, dass die Funktionsschicht eine Grammatur von 0 bis 5 g/m2, die obere Lage eine Grammatur von 5 bis 40 g/m2, der Pigmentstrich eine Grammatur von 5 bis 35 g/m2 und die untere Lage eine Grammatur aufweist, die der einzustellenden Gesamtgrammatur des Substrats abzüglich der Grammaturen der Funktionsschicht, der oberen Lage und des Pigmentstriches entspricht.In a further preferred embodiment of the invention it is provided that the functional layer has a grammage of 0 to 5 g / m 2 , the upper layer has a grammage of 5 to 40 g / m 2 , the pigment coating a grammage of 5 to 35 g / m 2 and the lower layer has a grammage corresponding to the total grammage of the substrate to be adjusted minus the grammages of the functional layer, the upper layer and the pigment stroke.

Vorzugsweise weist das Tapetensubstrat eine Gesamtgrammatur von 60 bis 180 g/m2 auf.Preferably, the wallpaper substrate has a total grammage of 60 to 180 g / m 2 .

Die Verfahrensseitige Lösung der Aufgabenstellung sieht vor, dass die untere und die obere Lage, vorzugsweise mittels Langsieben, aus je einer Zellulosesuspension oder einer Zellulosesuspension unter Zumischen von Synthesefasern für die untere Lage, gebildet und anschließend mittels Gautschen zusammen gefügt werden und die Oberseite mittels Satinieren mit einer für einen Direktdruck, insbesondere einen Tiefdruck geeignete hohe Druckqualität geschaffen wird und dass alle Vorgänge bei einer Temperatur unterhalb der Schmelztemperatur der Synthesefasern durchgeführt werden. Zu einen verhindert die Einstellung der Temperatur ein Vernetzen der Synthesefasern, so dass das Tapetensubstrat seine flexible Grundstruktur behält. Zum anderen wird mit dem Satinieren, wofür die reine Zellulosestruktur der Oberseite sehr gut geeignet ist, eine sehr ebene Oberfläche erzielt, die das Entstehen von missing dots beim Direktdruck vermeiden helfen.The process-side solution of the problem provides that the lower and upper layers, preferably by means of wires, each made of a cellulosic suspension or a cellulosic suspension with admixing synthetic fibers for the lower layer, are formed and then joined together by Gautschen and the top by means of satin with a high print quality suitable for a direct printing, in particular a gravure printing is created and that all processes are carried out at a temperature below the melting temperature of the synthetic fibers. On the one hand, the adjustment of the temperature prevents crosslinking of the synthetic fibers, so that the wallpaper substrate retains its flexible basic structure. On the other hand, the satin finish, for which the pure cellulose structure of the top is very well suited, achieves a very even surface, which helps avoid the creation of missing dots in direct printing.

In einer Variante des Verfahrens ist vorgesehen, auf die zu der Unterseite weisenden Seite der unteren Lage eine Funktonsschicht aufzubringen. Mittels dieser Funktionsschicht können die Haft- und Verarbeitungseigenschaften der Tapete beeinflusst werden. Insbesondere kann damit ein Curling verhindert werden.In a variant of the method, it is provided to apply a functional layer to the side of the lower layer facing the lower side. By means of this functional layer, the adhesion and processing properties of the wallpaper can be influenced. In particular, it can be used to prevent curling.

In einer weiteren Ausgestaltung des Verfahrens ist vorgesehen, dass auf die zur Oberseite weisende Seite der oberen Lage ein die Oberseite bildender Pigmentstrich in situ aufgebracht wird, der einerseits einer Vorfärbung der Tapete dient und andererseits die Oberflächenstruktur weiter verbessert. Dieser Pigmentstrich kann zweckmäßiger Weise direkt bei der Herstellung aufgebracht, da somit ein zusätzlicher Behandlungsschritt, der ein zusätzliches Handling der Tapetensubstratrollen erfordern würde, vermieden wird.In a further embodiment of the method is provided in that on the upper side of the upper layer facing the upper side, a pigment coating which forms the upper side is applied in situ, which on the one hand serves to pre-color the wallpaper and on the other hand further improves the surface structure. This pigment coating may conveniently be applied directly during production, thus avoiding an additional treatment step which would require additional handling of the wallpaper substrate rolls.

In einer Variante ist dagegen vorgesehen, dass auf die zur Oberfläche weisenden Seite der oberen Lage ein die Oberseite bildender Pigmentstrich separat aufgebracht wird. Somit kann der Hersteller bei der Bereitstellung des Tapetensubstrats dem Kundeninteresse gegebenenfalls besser gerecht werden.In a variant, on the other hand, it is provided that a pigment coating forming the upper side is applied separately to the side of the upper layer facing the surface. Thus, in providing the wallpaper substrate, the manufacturer may be better able to serve the customer's interest.

Wird der Pigmentstrich aus der flüssigen Phase auf den vorgetrockneten Verbund der Lagen aufgebracht, so ist der Verbund in der Lage, dem Pigmentstrich sehr schnell Flüssigkeit zu entziehen, wodurch dieser schneller in einen trockenen Zustand gelangt.If the pigment coating from the liquid phase is applied to the predried composite of the layers, then the composite is able to withdraw liquid from the pigment coating very quickly, as a result of which it gets into a dry state more quickly.

In ähnlicher Weise wie das Aufbringen des Pigmentstriches kann das Satinieren in situ oder separat und in beiden Fällen mittels eines Kalanders durchgeführt werden.In a manner similar to the application of the pigment coating, the satinization may be carried out in situ or separately and in both cases by means of a calender.

Die Erfindung soll nachfolgend anhand eines Ausführungsbeispieles näher beschrieben werden.The invention will be described below with reference to an embodiment in more detail.

Die zugehörige Zeichnung zeigt einen Querschnitt durch ein erfindungsgemäßes Substrat.The accompanying drawing shows a cross section through a substrate according to the invention.

Das erfindungsgemäße Tapetensubstrat 1 weist eine beim Einsatz der Tapete zur Wand weisende Unterseite 2 und eine beim Einsatz der Tapete in den Raum weisenden Oberseite 3 auf. Dazwischen ist eine untere Funktionsschicht 4, eine faserige untere Lage 5 aus einem Faserstoffgemisch aus Zellulose- und Synthesefasern und eine faserige obere Lage 6 aus einem synthesefaserfreien Zellulosefasergemisch angeordnet. Die untere Lage 5 und die obere Lage 6 sind durch Gautschen miteinander verfilzt. Auf der oberen Lage 6 ist ein die Oberseite 3 bildender Pigmentstrich 7 aufgebracht. Die Oberseite 3 ist satiniert und für durch Direktdruck, insbesondere für Tiefdruck, nahezu fehlerfrei bedruckbar ausgebildet.The wallpaper substrate 1 according to the invention has an underside 2 facing the wall when the wallpaper is used and an upper side 3 pointing into the room when the wallpaper is used. In between, a lower functional layer 4, a fibrous lower layer 5 of a pulp mixture of cellulose and synthetic fibers and a fibrous upper layer 6 of a synthetic fiber-free cellulose fiber mixture are arranged. The lower one Layer 5 and the upper layer 6 are matted together by Gautschen. On the upper layer 6 a top 3 forming pigment coating 7 is applied. The top 3 is satined and designed for printing by direct printing, especially for gravure printing, almost error-free.

Das erfindungsgemäße Tapetensubstrat wird auf einer Duplexlangsiebmaschine hergestellt. Es ist durchaus üblich, beide Lagen 5 und 6 aus einen gleichen Faserstoffgemisch aus Zellulose- und Synthesefasern herzustellen. Im Gegensatz dazu werden erfindungsgemäß die synthetischen Fasern, bei der oberen Lage 6 nicht mit dosiert. Die obere Lage 6 ist dabei die Lage, welche nach dem Tapezieren der fertigen Tapete zur Rauminnenseite zeigt.The wallpaper substrate of the invention is produced on a Duplexlangsiebmaschine. It is quite common to produce both layers 5 and 6 from a same pulp mixture of cellulose and synthetic fibers. In contrast, according to the invention, the synthetic fibers are not dosed in the upper layer 6. The upper layer 6 is the position which shows after wallpapering the finished wallpaper to the inside of the room.

Dadurch wird eine wesentlich glattere und weniger poröse Oberfläche geschaffen. Zur weiteren Veredlung der Oberfläche 3 wird ein Pigmentstrich 7 aufgetragen, welcher anschließend satiniert wird. Die so hergestellte Oberfläche 3 weist eine Struktur auf, wie sie für die nahezu fehlerfreie Bedruckbarkeit im Tiefdruck, insbesondere für die geringe Anzahl an Fehlstellen, so genannten missing dots, im Ausdruck erforderlich ist.This creates a much smoother and less porous surface. For further refinement of the surface 3, a pigment coating 7 is applied, which is then satined. The surface 3 thus produced has a structure as it is required for the almost error-free printability in gravure, especially for the small number of defects, so-called missing dots in the expression.

Bei dem Tapetensubstrat 1 kann eine Funktionsschicht 4 zur Wahrung bestimmter Eigenschaften, wie beispielsweise Anticurling, Faserhaftung u.ä., auf die Unterseite der unteren Lage aufgebracht werden.In the wallpaper substrate 1, a functional layer 4 can be applied to the underside of the lower layer to maintain certain properties, such as anti-curling, fiber adhesion and the like.

Damit wird ein Tapetensubstrat 1 angegeben, welches den durch den Tiefdruck gestellten höchsten Anforderungen genügt. Dieses Tapetensubstrat 1 weist somit Eigenschaften auf, wie sie ein für den Tiefdruck vorgesehenes herkömmliches Tapetenpapier aufweist.Thus, a wallpaper substrate 1 is specified, which satisfies the highest demands made by the gravure printing. This wallpaper substrate 1 thus has properties as it has provided for a gravure conventional wallpaper paper.

Das erfindungsgemäße Tapetensubstrat 1 wurde in einem Grammaturbereich von 130 g/m2 hergestellt.The wallpaper substrate 1 according to the invention was in a grammage range made of 130 g / m 2 .

Die obere Lage wurde zu 100% aus Zellulosefasern hergestellt und hatte eine Grammatur von 35 g/m2.The upper layer was made of 100% cellulose fibers and had a grammage of 35 g / m 2.

Die Unterbahn bestand aus einer dem Stand der Technik entsprechenden Vliestapete (Zellulose- und Synthesefasergemisch) mit einem Flächengewicht von 73 g/m2.The lower web consisted of a nonwoven wallpaper (cellulose and synthetic fiber mixture) corresponding to the state of the art with a surface weight of 73 g / m 2 .

Als Funktionsschicht wurde Stärke in einem Flächengewichtsbereich von 0,3 g/m2 zur Anticurlingbehandlung aufgetragen.As a functional layer, starch was applied in a basis weight range of 0.3 g / m 2 for anticurling treatment.

Der anorganische Pigmentstich wurde in einem Flächengewichtsbereich von 22 g/m2 aufgebracht.The inorganic pigment sting was applied in a basis weight range of 22 g / m 2 .

Das erfindungsgemäße Tapetensubstrat 1 weist eine Oberflächenrauhigkeit gemessen nach Parker Print Surf (DIN ISO 8791-4) von < 2,0 µm, insbesondere < 1,7 µm auf.The wallpaper substrate 1 according to the invention has a surface roughness measured according to Parker Print Surf (DIN ISO 8791-4) of <2.0 μm, in particular <1.7 μm.

Gegenwärtig am Markt erhältliche gestrichene Tapetenvliese weisen eine Parker Print Surf Wert von > 2,5 µm auf. Ungestrichene Tapetenvliese weisen einen Parker Print Surf Wert von >> 5 µm auf.Currently, coated wallpaper nonwovens that are available on the market have a Parker Print Surf value of> 2.5 μm. Uncoated wallpapers have a Parker Print Surf value of> 5 μm.

Papiere welche gegenwärtig im Tiefdruck für den gegenständlichen bestimmten Einsatzbereich eingesetzt werden, weisen üblicher Weise einen Parker Print Surf Wert von < 1,7 µm auf.Papers which are currently used in rotogravure for the particular application in question usually have a Parker Print Surf value of <1.7 μm.

Der unter Industriebedingungen durchgeführte Probedruck im Tiefdruckverfahren zeigte ein geschlossenes Druckbild ohne Fehlstellen (missing dots).The test print in the gravure printing process carried out under industrial conditions showed a closed print image without defects (missing dots).

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Tapetensubstratwallpaper substrate
22
Unterseitebottom
33
Oberseitetop
44
Funktionsschichtfunctional layer
55
untere Lagelower position
66
obere Lageupper layer
77
Pigmentstrichpigment coating

Claims (15)

  1. Wallcover backing for a dry-strippable wallcover with minimal elongation when wet, consisting of a multilayered web having a bottom side, which faces the wall in use of the wallcover, and a top side, which faces into the room in use of the wallcover, between which sides are arranged, in the direction from the bottom side to the top side, a fibrous lower ply composed of a fibrous mixture based on cellulose and synthetic fibres and a fibrous upper ply composed of a cellulose-based fibrous mixture free of synthetic fibre, characterized in that the lower ply and the upper ply are interfelted together by couching and the top side is finished such that it is printable by direct printing, more particularly gravure printing, at not more than 1 missing dot per cm2.
  2. Wallcover backing according to Claim 1, characterized in that a lower functional layer is applied to the bottom side.
  3. Wallcover backing according to Claim 1 or 2, characterized in that the cellulose-based fibres consist of 50 to 100% chemically produced fibres and may contain, in each case in a complementary amount, 0 to 50% of mechanically processed fibres and/or 0 to 50% of fibres recovered from wastepaper.
  4. Wallcover backing according to Claim 1 or 3, characterized in that a pigment coat is applied to the upper ply to form the top side.
  5. Wallcover backing according to Claim 4, characterized in that the pigment coat contains inorganic, more particularly mineral constituents.
  6. Wallcover backing according to Claim 5, characterized in that the pigment coat contains kaolins, titanium dioxide, carbonate, talc and speciality pigments singly or in admixture.
  7. Wallcover backing according to any one of Claims 3 to 6, characterized in that the functional layer has a basis weight of 0 to 5 g/m2, the upper ply has a basis weight of 5 to 40 g/m2, the pigment coat has a basis weight of 5 to 35 g/m2 and the lower ply has a basis weight which corresponds to the target overall basis weight for the backing minus the basis weights of the functional layer, of the upper ply and of the pigment coat.
  8. Wallcover backing according to Claim 7, characterized in that the wallcover backing has an overall basis weight of 60 to 180 g/m2.
  9. Process for producing a wallcover backing for a dry-strippable wallcover with minimal elongation when wet, consisting of a multilayered web having a bottom side, which faces the wall in use of the wallcover, and a top side, which faces into the room in use of the wallcover, between which sides are arranged, a fibrous lower ply composed of a fibrous mixture based on cellulose and synthetic fibres and a fibrous upper ply composed of a cellulose-based fibrous mixture free of synthetic fibre, characterized in that the lower and upper plies are each formed, preferably via Fourdrinier wires, from a cellulose suspension or a cellulose suspension with admixture of synthetic fibres for the lower ply and are subsequently joined together by couching and the top side is finished to create a high printable quality for a direct print, more particularly a gravure print, and in that all the operations are carried out at a temperature below the melting point of the synthetic fibres.
  10. Process according to Claim 9, characterized in that a functional layer is applied to the side of the lower ply which faces the bottom side.
  11. Process according to Claim 9 or 10, characterized in that the side of the upper ply which faces the top side has applied to it in situ a pigment coat forming the top side.
  12. Process according to Claim 11, characterized in that the side of the upper ply which faces the surface has applied to it separately a pigment coat forming the top side.
  13. Process according to Claim 11, characterized in that the pigment coat is applied from the liquid phase to the pre-dried bonded assembly of plies.
  14. Process according to any one of Claims 11 to 13, characterized in that the finishing is carried out in situ by means of a calender.
  15. Process according to any one of Claims 11 to 13, characterized in that the finishing is carried out separately by means of a calender.
EP07803541A 2006-09-29 2007-09-18 Wallpaper substrate and method for the production thereof Revoked EP2066842B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07803541T PL2066842T3 (en) 2006-09-29 2007-09-18 Wallpaper substrate and method for the production thereof

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006046794 2006-09-29
DE102006058929A DE102006058929B4 (en) 2006-09-29 2006-12-12 Wallpaper substrate and process for its preparation
PCT/EP2007/059838 WO2008040635A1 (en) 2006-09-29 2007-09-18 Wallpaper substrate and method for the production thereof

Publications (2)

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EP2066842A1 EP2066842A1 (en) 2009-06-10
EP2066842B1 true EP2066842B1 (en) 2011-05-25

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EP07803541A Revoked EP2066842B1 (en) 2006-09-29 2007-09-18 Wallpaper substrate and method for the production thereof

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EP (1) EP2066842B1 (en)
AT (1) ATE510963T1 (en)
DE (1) DE102006058929B4 (en)
ES (1) ES2366928T3 (en)
PL (1) PL2066842T3 (en)
RU (1) RU2428537C2 (en)
UA (1) UA93738C2 (en)
WO (1) WO2008040635A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2682522B1 (en) 2012-07-03 2015-06-24 Ahlstrom Corporation Dimensionally stable paper and production method thereof
FI126699B (en) 2014-05-15 2017-04-13 Metsä Board Oyj Process for making paperboard
EP2949812A1 (en) 2014-05-27 2015-12-02 Jokiel & Ullmann Consulting GbR Mixture for preparing an impregnation liquor for the impregnation of papers and nonwoven hybrid fabrics
EP2966222A1 (en) 2014-07-10 2016-01-13 Schoeller Technocell GmbH & Co. KG Base material for wallpapers

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT57724B (en) 1911-01-07 1913-02-25 Latzel & Kutscha Procedure for cleaning filters with granular filter material.
US2414833A (en) * 1944-05-09 1947-01-28 C H Dexter & Sons Inc Thermoplastic paper and process of preparing the same
CA933851A (en) * 1970-09-28 1973-09-18 R. Gunning John Manufacture of strippable wallpaper and strippable poster paper
GB1578755A (en) * 1976-03-30 1980-11-12 Ici Ltd Reinforced sheet-type wall covering
US4296162A (en) * 1978-03-14 1981-10-20 Jean Raymond W Wallcoverings
US4460643A (en) * 1983-02-07 1984-07-17 The Dexter Corporation Nonwoven fibrous backing for vinyl wallcover
DE20113109U1 (en) * 2001-08-07 2001-10-31 Ratinger Tapetenfabrik Gebhard wallpaper

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RU2009113685A (en) 2010-11-10
DE102006058929B4 (en) 2011-08-25
UA93738C2 (en) 2011-03-10
ATE510963T1 (en) 2011-06-15
PL2066842T3 (en) 2011-11-30
DE102006058929A1 (en) 2008-05-08
RU2428537C2 (en) 2011-09-10
EP2066842A1 (en) 2009-06-10
ES2366928T3 (en) 2011-10-26
WO2008040635A1 (en) 2008-04-10

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