EP1722985A2 - Papier decoratif a fibres presentant une charge electrique - Google Patents

Papier decoratif a fibres presentant une charge electrique

Info

Publication number
EP1722985A2
EP1722985A2 EP04821683A EP04821683A EP1722985A2 EP 1722985 A2 EP1722985 A2 EP 1722985A2 EP 04821683 A EP04821683 A EP 04821683A EP 04821683 A EP04821683 A EP 04821683A EP 1722985 A2 EP1722985 A2 EP 1722985A2
Authority
EP
European Patent Office
Prior art keywords
paper
abrasion
fibers
resin
resistant particles
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
EP04821683A
Other languages
German (de)
English (en)
Other versions
EP1722985B1 (fr
Inventor
Dieter DÖHRING
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.)
Lignum Technologies AG
Original Assignee
Kronospan Technical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kronospan Technical Co Ltd filed Critical Kronospan Technical Co Ltd
Priority to PL04821683T priority Critical patent/PL1722985T3/pl
Publication of EP1722985A2 publication Critical patent/EP1722985A2/fr
Application granted granted Critical
Publication of EP1722985B1 publication Critical patent/EP1722985B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B44C5/0469—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper
    • B44C5/0476—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper with abrasion resistant properties
    • 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
    • D21H27/28—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 treated to obtain specific resistance properties, e.g. against wear or weather
    • 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
    • D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/24—Polyesters
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24372—Particulate matter

Definitions

  • the invention relates to a method and an apparatus for the production of paper with an abrasion-resistant surface and to a paper produced in accordance with the method.
  • No. 4,940,503 discloses a method in which abrasion-resistant particles are optionally sprinkled onto an overlay impregnated with melamine resin or onto a decorative paper impregnated with melamine resin. The overlay and decorative paper are then pressed together in such a way that a decorative paper with an abrasion-resistant surface results.
  • the abrasion resistance that can be achieved with such a method is, however, relatively low in comparison to other methods.
  • An overlay, i.e. a paper, must be produced separately.
  • WO 00/44984 AI discloses a method in which a special dispersion containing abrasion-resistant particles such as corundum or silicon carbide is sprayed onto a decorative paper.
  • the decorative paper is in turn used in the production of a laminate floor panel.
  • this method it is possible to achieve high abrasion values.
  • the expenditure on equipment is comparatively great in comparison to the scattering of abrasion-resistant particles.
  • the abrasion-resistant particles applied to the decorative paper have to be covered with an overlay to protect a press if the decorative paper is to be pressed with a plate, for example to produce panels for a laminate floor or a worktop with an abrasion-resistant surface.
  • WO 00/44576 AI discloses a further method in which abrasion-resistant particles such as corundum are sprinkled onto the impregnated decorative paper. Then fibers are applied together with resin and the layer system is pressed. In this way A separate production of the decorative paper is to be avoided. However, it is problematic to provide a protective layer in this way that matches the positive properties of an overlay paper.
  • the object is achieved by a method in which abrasion-resistant particles are applied to a paper. Then fibers are charged electrostatically. When loaded, the fibers are applied to the paper. In this way it is relatively easy to bring fibers onto the paper in an orderly manner. The fibers then stand completely or predominantly vertically on the paper. A regular distribution of the fibers can be achieved in this way.
  • the result is a paper in which abrasion-resistant particles are applied to the surface. Furthermore, there are vertical fibers on the paper surface on the side with the abrasion-resistant particles.
  • a scattering roller is provided, for example, to which electrical charge is supplied.
  • the surface of the spreader roller has recesses into which the fibers pass, the recesses preferably have an irregular shape and are distributed irregularly on the surface of the roller, the fibers are brought onto the spreader roller from above, the spreader roller is preferably made of electrical material non-conductive material such as plastic or rubber, in order to be able to transfer electrical charge from the roller to the fibers. If the roller rotates, the fibers eventually fall off the roller.
  • the paper with the abrasion-resistant particles is then passed , The fibers fall on the paper and stand upright, If the paper is pressed in a press, the vertical fibers lay over the abrasion-resistant particles. The press is thus reliably protected against damage.
  • a press is used as the press, in which pressing is carried out with the aid of circulating belts or rollers.
  • the paper, together with plates enters the press from one side.
  • the vertical fibers are then bent evenly in one direction, This creates a uniform, protective surface,
  • the paper pressed with a plate is moved out of the press at another location,
  • the plate provided with the paper has an abrasion-resistant surface,
  • the product produced in this way can now serve as a worktop.
  • the panel is sawn into individual elements that have a predetermined, desired size.
  • the individual elements can now be provided with coupling elements on the side in order to provide panels for a floor covering.
  • the paper is usually provided with a decor, for this purpose the paper can be printed with a pattern, the abrasion-resistant particles are then on the decor, i.e. on the printed surface, the paper is inserted into the press with the plate brought that the decor is visible, the material of the fibers is then selected so that this practically does not prevent the view of the decor.
  • the fibers can be made of polyester. On the one hand it is possible to apply electrical charge to the fibers, on the other hand a decor remains visible through these fibers. Polyester does have the desired properties for the aforementioned purpose. However, this material is disadvantageously relatively expensive,
  • cotton linters are therefore preferably used. These are very short fibers which are produced and produced in cotton and which cannot be spun. This waste product can also be provided with an electrical charge.
  • a transparent protective layer can be provided so that a decor of an underlying paper remains visible.
  • the length of the fibers can be half a millimeter. However, the fibers can be two to four millimeters long.
  • a further roller is provided in particular next to the spreader roller, which is provided with bristles. This bristled roller also rotates and brushes the fibers out of the recesses of the spreader roller.
  • a doctor blade acts on the spreading roller in one embodiment, which retains excess scattered fiber. In this way, the predetermined amount of fibers reaches the paper,
  • funnels are preferably provided on the side of the paper in order to catch excess fibers and to be able to feed them back to the cleaning roller, etc. This recycling saves costs.
  • electrically charged fibers applied or to be applied to paper are provided with a resin, preferably with melamine resin, so as to provide further desired surface properties. Insensitivity to staining and chemical resistance are regularly desired. Melamine resin also protects the surface particularly well against moisture.
  • the abrasion-resistant particles are sprayed onto the paper together with resin.
  • a method is basically known from WO 00/44984 AI.
  • the paper is previously advantageously impregnated with a resin, in particular with a melamine resin or a mixture of a melamine resin and a urea resin, so as to improve the adhesion of the abrasion-resistant particles to the paper.
  • excess resin is returned to the container in which the abrasion-resistant particles are located with the resin.
  • the return of the resin saves costs on the one hand, but it is more important that the return of the resin creates a flow in the container. This flow helps to keep the abrasion-resistant particles in suspension. This ensures an even distribution of the particles in the resin. In this way, relatively large abrasion-resistant particles can also be processed,
  • the abrasion-resistant particles have been sprayed onto the paper together with the resin, this is advantageously dried in one embodiment of the invention.
  • the drying increases the molecular size, namely polycondensation.
  • a first layer is thus formed on the paper If electrically charged fibers are applied to this first layer, the fibers cannot penetrate this first layer. If the fibers penetrate this first layer, they are no longer available for the desired protection of a press. supply. Predrying thus helps the fibers to develop the desired protective effect,
  • abrasion-resistant particles are sprinkled on impregnated decorative paper.
  • the abrasion-resistant particles are coated with an adhesion promoter before scattering, in order to achieve good abrasion values.
  • electrically charged fibers are applied to the decorative paper.
  • the paper is expediently impregnated with a resin, preferably with the aid of metering rollers.
  • the impregnation can be carried out with a doctor blade. With the help of the resin or impregnation, abrasion-resistant particles are fixed on the paper,
  • the particles provided with the adhesion promoter are preferably dried before being sprinkled on.
  • the adhesion promoter encases the abrasion-resistant particles completely, in order to achieve particularly good abrasion values.
  • the abrasion-resistant particles are first immersed in a liquid that essentially consists of the adhesion promoter, alternatively the abrasion-resistant particles are sprayed with the adhesion promoter, this is still less expensive compared to the effort that has to be carried out according to WO 00/44984 AI, since there is no need to pay attention to metering and circulation ,
  • the particles are then dried and are now particularly suitable for use.
  • the dried, abrasion-resistant particles provided with an adhesion promoter are sprinkled onto the paper, in particular onto a decorative paper.
  • a roller is preferably used for the sprinkling, which is provided with depressions, in particular run unevenly, however, the depth of the depressions is essentially retained, the abrasion-resistant particles provided with the bonding agent are scattered onto the roller from above and thus enter the depressions, by means of a doctor blade excess material, i.e. excess material provided with an bonding agent abrasion-resistant particles are stripped off, then the rotating roller arrives at a brush that sweeps out the abrasion-resistant particles provided with an adhesion promoter,
  • the brush is preferably a rotating roller which is provided with bristles in order to evenly remove the particles provided with an adhesion promoter.
  • the abrasion-resistant particles are sprinkled evenly onto the decorative paper, preferably with an amount of 18 to 25 g / m 2 depending on the desired abrasion class.
  • the grain size is preferably 90 to 130 ⁇ m in diameter. If the diameter is chosen to be smaller, a relatively large amount of abrasion-resistant particles and adhesion promoter are used. If the diameter is chosen larger, the abrasion-resistant particles can damage the press despite a protective layer made of fibers.
  • the respective webs are passed, in particular, through a melamine or a mixture that contains melamine resin.
  • the adhesive promotes the abrasion-resistant particles, e.g. corundum particles or silicon carbide, in the Integrate resin matrix, otherwise an optically visible interface between the abrasion-resistant particles and the resin or the resin matrix can remain, which leads to graying. If no adhesion promoter is used, the abrasion-resistant particles can be torn out of the matrix, which leads to low abrasion values.
  • the surface temperature during the pressing is preferably 1 80 to 1 85 ° C.
  • pressures of 20 to 35 bar are used.
  • the specified temperature is advantageous for the resin material to harden.
  • the pressure mentioned is advantageous for keeping the water which contains the layer system in liquid form. Otherwise it would escape in gaseous form and thereby produce a rough surface.
  • the high pressure also ensures a very homogeneous surface,
  • the decorative paper particularly preferably has a mass of 20 to 60 g / m 2 in order to be able to make do with small amounts of resin.
  • the decorative paper is advantageously filled with acrylate or a dispersion containing acrylate, in order to further reduce the amount of relatively expensive melamine resin required for impregnation.
  • the acrylate or the dispersion is pressed into the decorative paper, in particular from both sides, in order to ensure that it gets inside the paper, WO 02/079 571 AI discloses suitable compositions and a method for bringing the acrylate or the dispersion within the meaning of the present invention inside the paper,
  • funnels are preferably provided on the side of the paper, in order to be able to catch excess abrasion-resistant particles.
  • corundum or aluminum oxide particles to be scattered are provided with an adhesion promoter, since materials such as silicon carbide can be built into a resin matrix relatively easily anyway, but silicon carbide has the disadvantage compared to corundum or aluminum oxide that it is dark particles, in particular with light decorations are clearly visible, usually silicon carbide is therefore less suitable for optical reasons,
  • decorative paper When impregnating, decorative paper is typically provided with 1 00 to 1 20% by weight of resin, based on the decorative paper, so if the basis weight of the decorative paper is, for example, 1 00 g / m 2 , 1 00 to 1 20 g resin is used. If, on the other hand, decorative paper with a weight of only 30 g / m 2 is provided and if an acrylate or an acrylate-containing dispersion has been pressed into the paper, the amount of resin required for impregnation can be reduced to 45 to 55% by weight.
  • mixed resins can also be used.
  • a mixed resin could consist of 70 to 80% by weight of urea resin and 20 to 30% by weight of melamine resin
  • decorative paper is preferably impregnated with a mixed resin, because it can save costs
  • the result is a decorative paper in which corundum lies in one plane when abrasion-resistant particles have been sprinkled onto the paper. This can be determined with a microscope.
  • the wafer mediator then advantageously provided in the finished product, which envelops the abrasion-resistant particles, can be determined.
  • adhesion promoters are particularly well suited to adhere to the corundum or aluminum oxide on the one hand and to achieve the desired adhesion and thus the desired abrasion resistance on the other hand with the resins used,
  • adhesion promoters are also suitable.
  • an amino-silane adhesion promoter has proven to be particularly suitable.
  • FIG. 1 Device for sprinkling abrasion-resistant particles on a paper
  • Fig. 2 paper produced
  • Fig. 3 Panel with manufactured paper
  • Abrasion-resistant particles 1 made of corundum with a diameter of 90 to 130 ⁇ m were coated with a silane coupling agent and dried.
  • the abrasion-resistant particles 1 are now in a free-flowing state and are sprinkled onto a roller 2, as shown in FIG. 1 in cross-section Roller 2 has depressions (not shown) on the surface.
  • the scattered particles reach a doctor blade 4 which bears against the roller 2 with an open end ensures that the abrasion-resistant particles 1 fill the depressions evenly and completely. From here, the abrasion-resistant particles become a rapidly rotating brush 5 transported, which rotates clockwise in the example with the 'in the direction of the arrow.
  • the abrasion-resistant particles are thus completely swept out of the recesses and thus metered onto the surface of a decorative paper 7, the decorative paper 7 is guided below the roller by means of suitably rotating rollers 8 and 9, the decorative paper 7 was made beforehand with a mixture 25% by weight of melamine resin and 74% by weight of urea resin impregnated, the decorative paper has a weight per unit area of 30 g / m 2 and acrylate on the inside, the amount of resin applied is 1 5 g per square meter of paper,
  • the abrasion-resistant particles 1 adjoin the side with the printed decor
  • a device which comprises the components shown in FIG. 1.
  • the components involved in this process step such as roller, brush and doctor blade then consist of electrically non-conductive paints such as rubber or plastic.
  • the components involved such as roller, doctor blade and / or brush are additionally charged with electrical charge. that the fibers that get onto the roller are electrostatically charged. If the fibers are now brushed out of the roller, they are accelerated in the direction of the paper. Due to the repulsion effect, the fibers are evenly distributed on the paper parallel to each other and are essentially perpendicular to the paper,
  • a relatively large amount of resin is preferably used in the application of the abrasion-resistant particles compared to the application of the particles by spraying especially when fibers are applied which have not been provided with a resin.
  • Based on the basis weight of the paper in the dry (raw) state typically 1 when spraying the mixture containing the resin and the abrasion-resistant particles 00 to 250% by weight applied.
  • the amount of resin is therefore chosen in one embodiment of the invention in such a way that the dry paper is provided with a layer whose weight is 2 to 2.5 times or even more,
  • FIG. 2 shows the basic structure.
  • the decorative paper 1 2 thus provided with an abrasion-resistant layer is now pressed, for example at a pressure of 30 bar and temperatures of 1 80 ° C., with a base plate 1 3 made of HDF and a backing paper 1 4.
  • a press is thus protected against damage from the abrasion-resistant particles.
  • panels of the desired size typically 20 to 40 cm wide and typically 80 cm to 160 cm in length, are sawn out and laterally provided with coupling means such as groove 15 or tongue 16.
  • Tongue and groove preferably have further locking means, not shown, which can positively connect two panels to one another so that there is a lock parallel to the surface of the panels.
  • Such locks are known, for example, from WO 02/079 57 1 AI.
  • the backing paper in particular has a low weight per unit area of 20 to 60 g / m 2 and is preferably provided with acrylate and impregnated with a urea resin or a mixture which predominantly contains urea resin before pressing. In this way, the costs for the application of the backing paper are minimized, since comparatively little and also relatively inexpensive resin is used.
  • the backing paper protects a panel or a worktop, etc. from warping,

Landscapes

  • Laminated Bodies (AREA)
  • Paper (AREA)
  • Floor Finish (AREA)

Abstract

Procédé et dispositif de production de papier ayant une surface résistante à l'abrasion, ainsi que papier produit selon ce procédé.
EP04821683.2A 2004-02-25 2004-11-19 Papier decoratif a fibres presentant une charge electrique Active EP1722985B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04821683T PL1722985T3 (pl) 2004-02-25 2004-11-19 Papier dekoracyjny zawierający elektrycznie naładowane włókna

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202004003061U DE202004003061U1 (de) 2004-02-25 2004-02-25 Dekorpapier mit elektrisch geladenen Fasern
PCT/EP2004/053016 WO2005080096A2 (fr) 2004-02-25 2004-11-19 Papier decoratif a fibres presentant une charge electrique

Publications (2)

Publication Number Publication Date
EP1722985A2 true EP1722985A2 (fr) 2006-11-22
EP1722985B1 EP1722985B1 (fr) 2018-02-07

Family

ID=34802053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04821683.2A Active EP1722985B1 (fr) 2004-02-25 2004-11-19 Papier decoratif a fibres presentant une charge electrique

Country Status (7)

Country Link
US (1) US7682668B2 (fr)
EP (1) EP1722985B1 (fr)
CN (1) CN1946572B (fr)
DE (1) DE202004003061U1 (fr)
PL (1) PL1722985T3 (fr)
RU (1) RU2337836C2 (fr)
WO (1) WO2005080096A2 (fr)

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EP1722985B1 (fr) 2018-02-07
WO2005080096A2 (fr) 2005-09-01
DE202004003061U1 (de) 2005-07-14
RU2337836C2 (ru) 2008-11-10
RU2006129800A (ru) 2008-03-27
WO2005080096A3 (fr) 2005-10-06
PL1722985T3 (pl) 2018-07-31
CN1946572A (zh) 2007-04-11
US7682668B2 (en) 2010-03-23
CN1946572B (zh) 2012-01-11
US20070184244A1 (en) 2007-08-09

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