EP4202117B1 - Papier décoratif à deux couches destiné à l'amélioration de la qualité d'impression - Google Patents

Papier décoratif à deux couches destiné à l'amélioration de la qualité d'impression Download PDF

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Publication number
EP4202117B1
EP4202117B1 EP21217264.7A EP21217264A EP4202117B1 EP 4202117 B1 EP4202117 B1 EP 4202117B1 EP 21217264 A EP21217264 A EP 21217264A EP 4202117 B1 EP4202117 B1 EP 4202117B1
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EP
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Prior art keywords
base paper
decorative base
decorative
stock layer
refractive index
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EP21217264.7A
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German (de)
English (en)
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EP4202117C0 (fr
EP4202117A1 (fr
Inventor
Christopher Altenburg
Michael Kloskowski
Knut Hornig
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Schoeller Technocell GmbH and Co KG
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Schoeller Technocell GmbH and Co KG
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    • 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
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply

Definitions

  • the invention relates to a decorative base paper for decorative coating materials, a process for its production, the use of the decorative base paper for the production of decorative coating materials and a decorative coating material comprising the decorative base paper.
  • decorative coating materials so-called decorative papers, also known as decorative films, are primarily used for surface coating in furniture production and in interior design.
  • a decorative paper is a synthetic resin-impregnated or synthetic resin-impregnated and surface-treated, printed or unprinted decorative base paper web.
  • Decorative papers are glued or bonded to a carrier board.
  • High-pressure laminates are laminates that are created by pressing several impregnated papers layered on top of each other.
  • the structure of these laminates generally consists of a transparent overlay that creates the highest surface resistance, a resin-impregnated decorative base paper (decorative paper) and one or more phenol-resin-treated kraft papers. Hardboard and chipboard as well as plywood are used as the base for this.
  • the decorative base paper impregnated with synthetic resin is directly base, for example a chipboard, using low pressure.
  • the decorative paper used for the above-mentioned coating materials is white or colored with or without additional printing.
  • So-called decorative base papers as starting materials for the production of the above-mentioned coating materials have to meet special requirements, such as high opacity for better coverage of the substrate, uniform formation and grammage of the sheet for uniform resin absorption, high light resistance, high purity and uniformity of the color for good reproducibility of the pattern to be printed, high print quality of the patterns to be printed, high wet strength for a smooth impregnation process, appropriate absorbency to achieve the required degree of resin saturation, dry strength during rewinding processes in the paper machine and during printing in the printing machine.
  • Decorative base papers generally consist of high-white sulfate pulp, predominantly hardwood pulp, up to 45% pigments and fillers as well as wet strength agents, dry strength agents, retention agents, rheological additives and fixing agents.
  • Decorative base papers differ from conventional papers in that they have a much higher filler content and do not contain the usual mass sizing or surface sizing with the well-known sizing agents such as alkyl ketene dimers.
  • decorative base papers consisting of a single layer of fibre material.
  • Such decorative base papers are used, for example, in EP 1 207 233 B1 and EP 1 379 729 A1
  • decorative base papers are known in the state of the art with which a good print result can be produced, for example with inkjet printing machines. The problem is that obtaining a good print quality often requires the Impregnation ability of the decorative base papers is impaired. For example, it is EP 1 749 134 A1 It is known to apply a color-receiving layer to the decorative base paper in order to improve its print quality.
  • the color-receiving layer to the decorative base paper leads to a significant deterioration in the impregnation properties and thus in the further processing of the decorative base paper, since the pores of the decorative base paper, particularly on its surface, are reduced or even closed by the mass of the color-receiving layer.
  • the additional work step of applying a color-receiving layer leads to increased use of material and time and thus higher production costs.
  • opacity is one of the most important properties of decorative base paper. This indicates the covering capacity of the carrier material.
  • pigments with a high refractive index are added to the fiber in large quantities. These pigments are necessary because many alternative pigments such as silicates, which are used in other paper products, have a refractive index comparable to the impregnating resins. A small difference in the refractive indices of the pigments, the pulp and the impregnating resins leads to a very low opacity of the decorative film after impregnation.
  • the decorative base paper itself serves as a carrier material for color design or the application of prints and decorations.
  • Wood or stone patterns that are produced using printing processes such as gravure printing or on digital inkjet printing machines are particularly popular.
  • the print is applied to the surface and the components of the inks penetrate the surface of the paper depending on the amount applied.
  • Due to the pigments with a high refractive index, such as titanium dioxide, contained in the decorative base paper a comparatively high proportion of colorants in the inks is required to achieve the desired color intensity, as the light is strongly scattered by these pigments and thus less light hits the colorants.
  • the deeper the inks, and thus the colorants contained therein, penetrate into the decorative base paper the stronger the The color effect of the colorants is weakened by the pigments with a high refractive index present in the decorative base paper.
  • a decorative base paper that ensures good optical coverage of the carrier material due to its high opacity inevitably has negative effects on the achievable color intensity and thus on the print quality and the optical design.
  • FR 2 997 421 A1 describes a decorative paper that has both good printability using inkjet printing and good resin absorption capacity, as the paper contains fillers with a high oil absorption capacity. However, these fillers have a low refractive index, which is why the opacity of the decorative paper is low.
  • EP 1 627 953 A1 describes a decorative paper that contains comparatively small amounts of titanium dioxide and calcined aluminum silicate as a filler.
  • Calcined aluminum silicate has a low refractive index of 0.1 to 1.2 compared to titanium dioxide, but contains enclosed micro air chambers that lead to a high opacity of the decorative paper.
  • the object of the invention was to provide a decorative base paper which does not have the aforementioned disadvantages of the prior art and is characterized in particular by a high print quality combined with good opacity and impregnability.
  • a decorative base paper for decorative coating materials wherein the decorative base paper comprises two fiber layers, wherein the first fiber layer comprises more than 5% by weight of at least one pigment with a refractive index of greater than 2.0, based on the dry pulp of the first fiber layer, and the second fiber layer comprises less than 5% by weight of at least one pigment with a refractive index of greater than 2.0, based on the dry pulp of the second fiber layer, wherein the second fiber layer comprises at least 1% by weight of at least one pigment with a refractive index of less than 2.0, based on the dry pulp of the second fiber layer.
  • the decorative base paper comprises two fiber layers that have a different proportion of pigment(s) with a high refractive index of greater than 2.0.
  • the proportion of pigment(s) with a high refractive index in the first fiber layer is higher than in the second fiber layer.
  • the first fiber layer therefore has a high opacity and behaves in its properties like a decorative base paper known in the prior art that has only one fiber layer.
  • the second fiber layer of the decorative base paper according to the invention can advantageously be specifically adapted to the requirements of the respective printing process.
  • a further advantage of the decorative base paper according to the invention is that a high print quality is obtained without an additional ink-receiving layer having to be applied to the decorative base paper, so that the decorative base paper according to the invention has good impregnability and can be produced more easily and cost-effectively.
  • a decorative base paper within the meaning of the invention is a paper which, in contrast to conventional papers, is neither sized in the mass nor has undergone surface sizing.
  • the decorative base paper according to the invention has at least two fiber layers.
  • the first fiber layer serves as a cover for a carrier material and is in full-surface contact with the carrier material.
  • the second The fiber layer can be printed with a decoration.
  • the second fiber layer is in full contact with the first fiber layer on its back and can have a decoration on its front side (visible side), which faces a viewer in the finished decorative coating material.
  • the two fiber layers of the decorative base paper according to the invention are mechanically connected to one another by the respective pulp fibers of the individual fiber layers.
  • the first fiber layer can contain pulp and pigments as well as common additives.
  • Common additives can be wet strength agents, dry strength agents, retention agents, rheological additives and fixing agents.
  • the first fibrous layer has more than 5% by weight, preferably more than 15% by weight, particularly preferably more than 25% by weight, of at least one pigment with a refractive index of greater than 2.0, based on the dry pulp of the first fibrous layer. It has proven particularly advantageous if the first fibrous layer has a higher amount of pigment(s) with a refractive index of greater than 2.0 than the second fibrous layer.
  • the refractive index is determined using the usual methods known to the person skilled in the art at the wavelength of the sodium D line (nD) of 589 nm using a refractometer.
  • Suitable pigments with a refractive index of greater than 2.0 are, for example, titanium dioxide and zinc sulfide or mixtures thereof. According to a preferred embodiment of the invention, the at least one pigment with a refractive index of greater than 2.0 contains titanium dioxide or consists thereof.
  • pigment(s) with a refractive index greater than 2.0 small amounts (less than 15% by weight) of pigment(s) with a refractive index less than 2.0 can also be used in the first fiber layer.
  • pigments with a refractive index less than 2.0 that can be used in the first fiber layer are the pigments with a refractive index less than 2.0 described below in connection with the second fiber layer.
  • the opacity of the decorative base paper is at least 80%, preferably at least 85%, particularly preferably at least 90%, measured according to DIN 53146 with an ACE colorimeter from Data Color.
  • the titanium dioxide content in the decorative base paper was determined according to DIN 54370.
  • the basis weight of the first fiber layer preferably makes up the majority of the total basis weight of the decorative base paper.
  • the basis weight of the first fiber layer can be at least 40 g/m 2 , preferably between 40 g/m 2 and 250 g/m 2 , particularly preferably between 55 g/m 2 and 120 g/m 2 . This achieves an optimal balance between sufficient coverage of the substrate (sufficient opacity) on the one hand and the lowest possible consumption of starting materials on the other.
  • the second fibrous material layer of the decorative base paper according to the invention can comprise, in addition to pulp and optionally pigments, conventional additives.
  • Conventional additives can be wet strength agents, dry strength agents, retention agents, rheological additives and fixing agents.
  • Fixing agents as used here do not mean the dye-fixing substances that can be used in the second fibrous material layer according to the invention, as defined further below.
  • the usual additives can be used in amounts customary in the prior art in the second fibrous material layer of the decorative base paper according to the invention. According to a preferred embodiment of the invention, the usual additives are used in an amount of 0.02% by weight, preferably at least 0.05% by weight, particularly preferably at least 0.2% by weight to at most 5% by weight, based on the dry pulp of the second fibrous material layer.
  • the second fibrous material layer has less than 5% by weight, preferably less than 3% by weight, particularly preferably less than 1% by weight, very particularly preferably none, of at least one pigment with a refractive index of greater than 2.0, based on the dry pulp of the second fibrous material layer.
  • the same at least one pigment with a refractive index of greater than 2.0 that was already described above in connection with the first fibrous material layer can be present in the second fibrous material layer.
  • the second fibrous material layer has a very low, preferably no, opacity. As a result, the colorants in the ink are used more efficiently when printing the second fibrous material layer of the decorative base paper according to the invention than with a comparable single-layer decorative base paper with high opacity.
  • the second fibrous material layer can additionally contain dye-fixing substances selected from salts and/or cationic polymers.
  • the proportion of salts and/or cationic polymers in the second fibrous material layer is at least 0.5% by weight, preferably at least 2% by weight, particularly preferably at least 5% by weight, and at most 20% by weight, based on the dry pulp of the second fibrous material layer.
  • Suitable cationic polymers are, for example, polyvinylamine, polyacrylamides and polyethyleneimines.
  • Suitable salts are alkaline earth metal salts, in particular alkaline earth metal halides and alkaline earth metal nitrates or mixtures thereof.
  • the dyes usually used in printing inks for gravure printing or for digital printing processes such as inkjet printing are anionically charged. These anionic dyes are fixed to the surface of the fiber layer by the salts and/or cationic polymers. The presence of dye-fixing substances in the second fiber layer therefore improves the printability of the decorative base paper.
  • the second fibrous layer contains at least 1% by weight of at least one pigment with a refractive index of less than 2.0, based on the dry pulp of the second fibrous layer.
  • the second fibrous layer contains at least 5% by weight, particularly preferably at least 10% by weight and at most 40% by weight of at least one pigment with a refractive index of less than 2.0, based on the dry pulp of the second fibrous layer.
  • the at least one pigment with a refractive index of less than 2.0 can be selected from aluminum oxide, aluminum hydroxide, boehmite, clay, calcined clays, kaolins, in particular natural kaolins, delaminated kaolins and other aluminum silicates, including synthetic ones, talc, diatomaceous earth, aluminum trihydrate and silicas (e.g. precipitated or pyrogenically produced silicas) and mixtures thereof.
  • a cationized pyrogenic silica is preferably used as the silica.
  • the at least one pigment with a refractive index of less than 2.0 contained in the second fibrous layer additionally has a specific surface area of at least 1 m 2 /g, preferably at least 50 m 2 /g, particularly preferably at least 100 m 2 /g, in particular 150 m 2 /g, most preferably at least 190 m 2 /g, according to BET (according to DIN ISO 9277).
  • the second fiber layer has at least one pigment with a refractive index of less than 2.0 with a specific surface area of 200 to 330 m 2 /g. It has been found that the addition of at least one pigment with a high specific surface area further improves the printability of the decorative base paper.
  • the basis weight of the second fibrous material layer preferably makes up the smaller proportion of the total basis weight of the decorative base paper.
  • the basis weight of the second fibrous material layer can be at most 100 g/m 2 , preferably between 15 g/m 2 and 100 g/m 2 , particularly preferably between 20 g/m 2 and 50 g/m 2 .
  • the second fibrous material layer advantageously has the lowest possible basis weight. Basis weights of less than 15 g/m 2 cannot be achieved in an economically viable manner using the currently common manufacturing processes.
  • the decorative base paper according to the invention can be used white or colored.
  • Dye(s) can be used to color the decorative base paper according to the invention.
  • inorganic dye(s) are metal oxides, hydroxides and oxide hydrates, metal sulfides, sulfates, chromates and molybdates or mixtures thereof.
  • organic dye(s) are carbonyl colorants (e.g. quinones, quinacridones), cyanine colorants, azo colorants, azomethines and methines, phthalocyanines or dioxazines.
  • mixtures of inorganic dye(s) and organic dye(s) are preferred.
  • commercially available dyes such as iron oxide (EO) yellow (Bayferrox 415), iron oxide (EO) red (Bayferrox 110 M), carbon black (Carbofin LC 2900), dye blue PB 15, dye violet PV 23 and dye yellow PY 97 and mixtures thereof can be used.
  • dye(s) refers to a single dye or a dye mixture.
  • the dyes are brightly colored coloring substances, not white pigments or achromatic, non-coloring substances.
  • the amount of dye(s) in the decorative base paper can be between 0.0001 and 5% by weight, in particular between 0.001 and 4% by weight.
  • the quantity refers to the mass of the total pulp of the decorative base paper.
  • the first and second fibrous layers contain dye(s).
  • the ratio of the weight proportions of dye(s) in the first fibrous layer to the weight proportions of dye(s) in the second fibrous layer is less than 1, particularly preferably less than 0.5.
  • only the second fiber layer comprises dye(s).
  • smoothed paper usually has a lower air permeability than unsmoothed paper.
  • the decorative base paper according to the invention has an impregnation behavior with a value of less than 10 s, particularly preferably less than 5 s.
  • the impregnation behavior is determined according to the method explained in connection with the examples.
  • the first fiber layer is formed in a first wire section and the second fiber layer is formed in a second wire section of a paper machine.
  • the paper machine used can be a fourdrinier paper machine with or without top-side drainage, a cylinder-shaped paper machine or a gap-forming paper machine, as is the case, for example, in the EP 0 851 058 B1
  • the different fiber layers can be formed using several single-layer or multi-layer headboxes.
  • the two fiber layers according to steps a) and b) can also be formed in a common step on a single wire section, such as a fourdrinier wire, a fourdrinier wire with top drainage, a round wire or a gap-former, using a multi-layer headbox. It is also possible to form the second fiber layer wet-on-wet using a secondary headbox placed on the first fiber layer. This can be done with or without subsequent top drainage.
  • Softwood pulp, hardwood pulp or mixtures of both types of pulp can be used to form the first and second fiber layers.
  • 100% hardwood pulp is preferred.
  • mixtures of softwood/hardwood pulp in a mass ratio of 5:95 to 50:50, in particular 10:90 to 30:70, can also be used.
  • the pulp mixture can be ground at a consistency of 2 to 5 wt.% to a degree of grinding of 10 to 45°SR.
  • the components mentioned above in connection with the decorative base paper according to the invention such as pigments, dyes and wet strength agents such as polyamide/polyamine-epichlorohydrin resin, cationic polyacrylates, modified melamine-formaldehyde resin or cationized starches, are added in quantities customary in the production of decorative base papers and mixed well with the pulp mixture.
  • the thick stock produced in the mixing vat or continuously can be diluted to a consistency of about 1%. If necessary, other auxiliary materials such as retention aids, defoamers, dyes and other previously mentioned auxiliary materials or mixtures thereof can be added.
  • This thin stock is fed via the headbox of the paper machine to the wire section or twin-wire section. The respective first or second fiber layer is formed.
  • the first and second fiber layers are combined in step c) to form a decorative base paper.
  • the decorative base paper is then dewatered and dried.
  • dewatering and drying preferably take place after the two fiber layers have been brought together in step c).
  • the basis weight of the dry decorative base paper produced can be 15 to 300 g/m 2 , preferably 60 to 130 g/m 2 .
  • the decorative base papers can first be printed and then impregnated or soaked with synthetic resins commonly used for this purpose.
  • Common synthetic resins used for this purpose include melamine-formaldehyde resin, urea-formaldehyde resin, phenol-formaldehyde resin, polyacrylates, acrylic acid ester-styrene copolymers or their compatible mixtures.
  • the amount of dry weight of the synthetic resin is 40 to 250%, preferably 80 to 125%, based on the basis weight of the decorative base paper.
  • Impregnation can also take place in the paper machine's size press.
  • the decorative base paper can be impregnated in such a way that the paper is not completely impregnated.
  • Such decorative papers are also referred to as pre-impregnated papers.
  • the proportion of synthetic resin introduced into the decorative base paper by impregnation is 25 to 30% by weight, based on the basis weight of the decorative base paper.
  • the impregnated or partially impregnated decorative base papers can be varnished and then applied to a substrate such as a wooden panel or a wood-based material by thermal pressing.
  • Figure 1 shows on the left side a schematic representation of a decorative base paper 1 according to the invention.
  • the decorative base paper 1 comprises a first fibrous material layer 2, which has more than 5% by weight of at least one pigment 3 with a refractive index of greater than 2.0, based on the dry pulp of the first fibrous material layer.
  • the decorative base paper comprises a second fibrous material layer 4, which less than 5% by weight of at least one pigment 3 having a refractive index greater than 2, based on the dry pulp of the second fiber layer.
  • the course of the proportion (in % by weight based on the dry pulp of the respective fiber layer) of the pigment 3 contained in the first and second fiber layer with a refractive index of greater than 2.0 is shown as an example. From the exemplary course of the proportion of pigment 3, it can be seen that this is significantly above 5 % by weight in the first fiber layer 2 and below 5 % by weight in the second fiber layer 4.
  • a pulp suspension was prepared by grinding a pulp mixture of 80% by weight eucalyptus pulp and 20% by weight pine sulphate pulp at a consistency of 5% to a degree of grinding of 33°SR (Schopper-Riegler). 1.8% by weight epichlorohydrin resin was then added as a wet strength agent. This pulp suspension was adjusted to a pH value of 6.5 with aluminium sulphate. A mixture of 30 wt.% titanium dioxide and 5 wt.% talc, 0.11 wt.% of a retention aid and 0.03 wt.% of a defoamer are added. The weight information refers to the weight of the pulp (dry).
  • a pulp suspension was prepared by grinding a pulp mixture of 80% by weight eucalyptus pulp and 20% by weight pine sulphate pulp at a consistency of 5% to a degree of grinding of 33°SR (Schopper-Riegler). 1.5% by weight epichlorohydrin resin was then added as a wet strength agent. This pulp suspension was adjusted to a pH of 6.5 using aluminium sulphate. A mixture of 10% by weight silica (Aerosil 300) and 5% by weight calcined kaolin (Ansilex 93), 1% by weight CaCl2, 0.11% by weight of a retention aid and 0.03% by weight of a defoamer was then added to the pulp suspension. The weights refer to the weight of the pulp (atro).
  • the resulting decorative base paper and the comparison papers were printed using an ink-jet digital printing system from Palis (digital printing system palis 2250) and using commercially available, aqueous ink-jet inks.
  • the color density and print sharpness as well as the penetration and air permeability of the printed decorative base papers were determined in the laboratory.
  • test results in Table 1 show that the decorative base papers 1 and 2 according to the invention have a high opacity and can also be easily impregnated.
  • the examples according to the invention exhibit significantly higher print sharpness and higher color densities.
  • the basis weight was determined according to DIN EN ISO 536.
  • the purpose of the test is to characterize the porosity of the paper structure and thus its impregnation capacity.
  • the time required for a certain amount of air to flow through a paper surface at a constant pressure is measured.
  • the measurement is carried out in accordance with ISO 5636-5 (2014) using the Densometer 121D from Lorenzen & Wettre.
  • the measured values are given in Gurley seconds/100 ml. Values less than 25 s/hml indicate paper with very good air permeability. Values higher than 60 s/hml indicate a compacted structure and thus poor permeability.
  • the opacity was determined using an ACE colorimeter from Data Color according to DIN 53146. The lower the value, the less opaque the paper and the more transparent it is.
  • the penetration test is used to determine the behavior of the decorative base paper during impregnation.
  • the penetration is the time in which the paper is saturated with resin perpendicular to the paper plane.
  • a 70x70 mm sheet of decorative base paper is placed in a resin bath with the decorative side (side to be printed) facing upwards. The time from placing the sheet until it is completely saturated is recorded.
  • a resin solution with 52% by weight resin is used for the resin bath. It is produced by dissolving powdered melamine-formaldehyde resin (Kauramin 773) in distilled water heated to 45 °C.
  • the image quality is assessed by measuring the color density for the primary colors cyan, magenta, yellow and black.
  • the color densities are measured using the SpectroEye densitometer from x-rite. Starting from zero, increasing values mean increasing color density.
  • the visual analysis of the print sharpness of the printed papers was carried out using a panel of three independent observers. Each of the three people gave a rating between 1 (very good) and 6 (very poor) according to the ink dot fineness. The print sharpness values given in the table represent the average of these three independent ratings.

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Claims (14)

  1. Papier support de décoration pour matériaux de revêtement décoratifs,
    caractérisé en ce que le papier support de décoration comprend deux couches de fibres, dans lequel la première couche de fibres présente plus de 5 % en poids d'au moins un pigment comportant un indice de réfraction supérieur à 2,0, par rapport à la pâte de cellulose sèche de la première couche de fibres , et la seconde couche de fibres présente moins de 5 % en poids d'au moins un pigment comportant un indice de réfraction supérieur à 2,0, par rapport à la pâte de cellulose sèche de la seconde couche de fibres, dans lequel la seconde couche de fibres contient au moins 1 % en poids d'au moins un pigment comportant un indice de réfraction inférieur à 2,0, par rapport à la pâte de cellulose sèche de la seconde couche de fibres .
  2. Papier support de décoration pour matériaux de revêtement décoratifs selon la revendication 1, caractérisé en ce que l'au moins un pigment comportant un indice de réfraction inférieur à 2,0 dans la seconde couche de fibres présente une surface spécifique d'au moins 50 m2/g selon la norme DIN ISO 9277.
  3. Papier support de décoration pour matériaux de revêtement décoratifs selon l'une des revendications 1 ou 2, caractérisé en ce que la seconde couche de fibres peut être imprimée avec un décor, en particulier au moyen du procédé d'impression à jet d'encre.
  4. Papier support de décoration pour matériaux de revêtement décoratifs selon l'une des revendications précédentes, caractérisé en ce que la seconde couche de fibres contient en outre des substances fixant les colorants, choisies parmi des sels et/ou des polymères cationiques.
  5. Papier support de décoration pour matériaux de revêtement décoratifs selon la revendication 4, caractérisé en ce que la proportion de sels et/ou de polymères cationiques dans la seconde couche de fibres est d'au moins 0,5 % en poids, par rapport à la pâte de cellulose sèche de la seconde couche de fibres.
  6. Papier support de décoration pour matériaux de revêtement décoratifs selon l'une des revendications précédentes, caractérisé en ce que la seconde couche de fibres présente un grammage de 100 g/m2 au maximum.
  7. Papier support de décoration pour matériaux de revêtement décoratifs selon l'une des revendications précédentes, caractérisé en ce que la première couche de fibres présente un grammage d'au moins 40 g/m2.
  8. Papier support de décoration pour matériaux de revêtement décoratifs selon l'une des revendications précédentes, caractérisé en ce que la première couche de fibres présente plus de 15 % en poids d'au moins un pigment comportant un indice de réfraction supérieur à 2,0, par rapport à la pâte de cellulose sèche de la première couche de fibres.
  9. Papier support de décoration pour matériaux de revêtement décoratifs selon l'une des revendications précédentes, caractérisé en ce que l'opacité du papier support de décoration est d'au moins 80 % selon la norme DIN 53146.
  10. Procédé permettant la fabrication d'un papier support de décoration selon l'une des revendications précédentes, comprenant les étapes suivantes :
    a) formation d'une première couche de fibres dans une première section de toile d'une machine à papier, dans lequel la première couche de fibresprésente plus de 5 % en poids d'au moins un pigment comportant un indice de réfraction supérieur à 2,0, par rapport à la pâte de cellulose sèche de la première couche de fibres,
    b) formation d'une seconde couche de fibresdans une seconde section de toile de la machine à papier, dans lequel la seconde couche de fibres présente moins de 5 % en poids d'au moins un pigment comportant un indice de réfraction supérieur à 2,0, par rapport à la pâte de cellulose sèche de la seconde couche de fibres,
    c) réunir la première et la seconde couche de fibres en un papier support de décoration.
  11. Procédé permettant la fabrication d'un papier support de décoration selon la revendication 10, caractérisé en ce qu'après l'étape c), une déshydratation et un séchage sont effectués.
  12. Procédé permettant la fabrication d'un papier support de décoration selon la revendication 10 ou 11, caractérisé en ce que la machine à papier est une machine à papier à double section de toile.
  13. Utilisation d'un papier support de décoration selon l'une des revendications 1 à 9 pour la fabrication de matériaux de revêtement décoratifs.
  14. Matériau de revêtement décoratif, comprenant un papier support de décoration selon l'une des revendications 1 à 9.
EP21217264.7A 2021-12-23 2021-12-23 Papier décoratif à deux couches destiné à l'amélioration de la qualité d'impression Active EP4202117B1 (fr)

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CN120211143B (zh) * 2025-04-01 2025-10-03 广东冠豪高新技术股份有限公司 一种白芯白卡纸及其制备方法和应用

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Publication number Priority date Publication date Assignee Title
DE19651493A1 (de) 1996-12-11 1998-06-18 Voith Sulzer Papiermasch Gmbh Siebpartie und Verfahren zum Formen einer mehrlagigen Faserstoffbahn
DE10057294C5 (de) 2000-11-17 2005-06-30 Technocell Dekor Gmbh & Co. Kg Dekorrohpapier mit hoher Opazität, sowie Dekorpapier oder Dekorfolie
DE10115570B4 (de) 2001-03-28 2005-09-08 Technocell Dekor Gmbh & Co. Kg Dekorrohpapier mit verbesserter Opazität
FR2870265B1 (fr) 2004-05-13 2006-07-14 Arjowiggins Soc Par Actions Si Papier decoratif et stratifie decoratif le comportant
DE102004038197B4 (de) * 2004-08-05 2010-06-17 Bene_Fit Gmbh Dekorpapier und Verwendung von Aluminiumsilikat zur Herstellung von Dekorpapier
FR2997421B1 (fr) * 2012-10-30 2015-04-17 Munksjo Arches Papier decoratif pour stratifies.

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EP4202117A1 (fr) 2023-06-28

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