EP3686028A1 - Procédé de fabrication d'une plaque résistante à l'abrasion en matériau dérivé du bois - Google Patents

Procédé de fabrication d'une plaque résistante à l'abrasion en matériau dérivé du bois Download PDF

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Publication number
EP3686028A1
EP3686028A1 EP19153016.1A EP19153016A EP3686028A1 EP 3686028 A1 EP3686028 A1 EP 3686028A1 EP 19153016 A EP19153016 A EP 19153016A EP 3686028 A1 EP3686028 A1 EP 3686028A1
Authority
EP
European Patent Office
Prior art keywords
resin layer
resin
weight
wood
layer
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
EP19153016.1A
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German (de)
English (en)
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EP3686028B1 (fr
Inventor
Christoph Schumacher
Stefan Zick
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.)
Flooring Technologies Ltd
Original Assignee
Flooring Technologies 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
Priority to PL19153016T priority Critical patent/PL3686028T3/pl
Application filed by Flooring Technologies Ltd filed Critical Flooring Technologies Ltd
Priority to PT191530161T priority patent/PT3686028T/pt
Priority to EP19153016.1A priority patent/EP3686028B1/fr
Priority to ES19153016T priority patent/ES2870156T3/es
Priority to CN202310262456.4A priority patent/CN116198253A/zh
Priority to CA3127265A priority patent/CA3127265C/fr
Priority to EP20701257.6A priority patent/EP3914459A1/fr
Priority to AU2020210473A priority patent/AU2020210473B2/en
Priority to JP2021542353A priority patent/JP7033696B2/ja
Priority to US17/424,696 priority patent/US11440341B2/en
Priority to CN202080010411.2A priority patent/CN113365850B/zh
Priority to RU2021120971A priority patent/RU2767202C1/ru
Priority to RU2022102592A priority patent/RU2022102592A/ru
Priority to PCT/EP2020/050300 priority patent/WO2020151949A1/fr
Publication of EP3686028A1 publication Critical patent/EP3686028A1/fr
Application granted granted Critical
Publication of EP3686028B1 publication Critical patent/EP3686028B1/fr
Priority to US17/816,754 priority patent/US11872837B2/en
Priority to AU2022259724A priority patent/AU2022259724B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/58—No clear coat specified
    • B05D7/584—No clear coat specified at least some layers being let to dry, at least partially, before applying the next layer
    • 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
    • B44C5/0407—Ornamental plaques, e.g. decorative panels, decorative veneers containing glass elements
    • 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
    • B44C5/0492—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 containing wooden elements

Definitions

  • the present invention relates to a method for producing an abrasion-resistant wood-based panel provided with a decorative layer, in particular with a wooden-based panel provided with a structure that is synchronous with the decor.
  • a large number of products or product surfaces that are subject to wear due to mechanical stress must be protected against premature damage or destruction by wear by applying wear-resistant layers. These products can be e.g. B. act on furniture, interior panels, floors, etc. Depending on the frequency and strength of use, different protective measures must be applied so that the user can be guaranteed the longest possible service life.
  • a large number of the above-mentioned products have decorative surfaces which, when worn due to intensive use, quickly appear unsightly and / or can no longer be cleaned.
  • These decorative surfaces very often consist of papers impregnated with thermosetting resins, which are pressed onto the wood-based substrate used in so-called short-cycle presses.
  • Melamine-formaldehyde resin is very often used as a thermosetting resin.
  • One approach to improving the wear resistance of decorative surfaces is to apply or introduce abrasion-resistant particles in the near-surface resin layers. This can e.g. by applying a liquid resin containing abrasion-resistant particles to the corresponding surfaces, in the case of decorative wood-based panels mostly corundum particles being used as abrasion-resistant particles.
  • the abrasion-resistant particles can also be sprinkled on using a suitable device.
  • the corundum-containing layer with subsequent resin layers was blocked against the pressed plate to reduce sheet wear.
  • glass spheres can be introduced into the liquid layer structure together with the resin layers, the glass spheres acting as a spacer between abrasion-resistant particles and press plate. With that, the sheet wear could be reduced at least somewhat.
  • the present invention is therefore based on the technical problem of ensuring, in addition to the safe achievement of high abrasion values, in particular the abrasion classes AC4 to AC6, at the same time a low press plate wear.
  • This should primarily be achieved for a process in which printed plates are processed in a wide variety of formats. If possible, process simplification and at least cost neutrality should be achieved. If possible, the disadvantages already discussed should no longer arise due to a new process. This should also enable effective quality control that provides timely information about the current process.
  • the present method accordingly makes it possible to provide wood-based panels provided with a decorative layer, the decorative layer being provided with a structure which is synchronous with the decor, in various formats with high wear resistance in a cost-effective manner.
  • a first resin layer in particular in the form of a first thermosetting resin layer with a high solids content, such as a melamine-formaldehyde resin layer, is applied to the decorative layer (pretreated or not pretreated) of the wood-based panel.
  • a first resin layer in particular in the form of a first thermosetting resin layer with a high solids content, such as a melamine-formaldehyde resin layer
  • There is initially no drying or drying of the first resin layer but rather the abrasion-resistant particles are sprinkled evenly onto the wet or still liquid first resin layer on the top of the wood-based panel using a suitable scattering device.
  • the abrasion-resistant particles can sink into the resin layer. Due to the high solids content of the resin and the resulting increased viscosity, the abrasion-resistant particles are also well embedded in the resin layer.
  • a second resin layer with an increased solids content is applied to the still moist first resin layer.
  • This is done by installing an application unit in the processing direction behind the spreader (ie between the first dryer and the spreader). With its roller application, the additionally installed application unit picks up the abrasion-resistant particles that are not fastened to the first resin layer or did not penetrate into the first resin layer and transports them back into the resin application unit. A compensation concentration is established there and the abrasion-resistant particles that have been removed are evenly applied to the next surfaces via the roller. There is thus an accumulation of the abrasion-resistant particles in the second application unit up to an abrasion-resistant particle content of max. 10%. This prevents blowing away or picking up loose particles in the dryer.
  • the abrasion-resistant particles are covered and no longer protrude from the coated surface due to the existing layer structure of resin layers with increased solids content and conventional, normal solids content, cellulose fibers and glass balls. In this way the adverse effect e.g. can be reduced to a subsequent press plate of corundum particles protruding from the coated surface or even largely eliminated.
  • the service life of the press plates in the subsequent pressing process for laminate formation can be increased. Overall, the process costs are reduced due to reduced material and maintenance costs. Also, no new devices / devices need to be installed in the production line.
  • the present layer structure also enables the embossing of structures that are synchronous with the decor using deeper structured press plates. This is made possible by the thickness of the entire layer, which can only be achieved through the specific resin structure with layers of resins with different solids contents. With the present method, improvements between 25 and 50% can be observed based on the recorded sheet life.
  • the wood-based panel provided with the decorative layer is not placed in a dryer, such as e.g. an IR dryer. This can be done by switching off an IR dryer provided in the production line or there is no IR dryer provided in the production line.
  • a dryer such as e.g. an IR dryer.
  • the protective layer can be a formaldehyde-containing resin, in particular a melamine-formaldehyde resin, urea-formaldehyde resin or melamine-urea-formaldehyde resin and contain glass balls (size 50-150 ⁇ ) as spacers for the intermediate storage of the plates. This protective layer serves to temporarily protect the decorative layer for storage before further refinement.
  • the protective layer on the decorative layer has not yet fully hardened, but is provided with a certain residual moisture content of approximately 10%, preferably approximately 6%, and can be further crosslinked.
  • Such protective layers are for example in the WO 2010/112125 A1 or EP 2 774 770 B1 described.
  • the typically used step of heating decorative layers provided with such a (thermosetting) protective layer serves to dry the protective layer and adjust the degree of residual moisture and thus the stickiness of the protective layer and the adhesion of subsequent resin layers.
  • the step of heating the protective layer has a negative effect on the scatter pattern of the abrasion-resistant particles. If heating of the printed wood-based panel provided with a protective layer is omitted, the scatter pattern is homogenized and thus a uniform distribution of the abrasion-resistant particles on the panel surface.
  • the resin layers used in the present process are preferably based on aqueous formaldehyde-containing resins, in particular melamine-formaldehyde resin, urea-formaldehyde resin or melamine-urea-formaldehyde resin.
  • the resins used preferably each contain additives such as hardeners, wetting agents (surfactants or mixtures thereof), defoamers, release agents and / or other components.
  • the wetting agent is used in the resin layers in an amount of 0.1-1% by weight.
  • Release agents and smoothing agents are preferably added to the fifth and sixth resin layers in amounts between 0.5-1.5% by weight.
  • a latent hardener is preferably used as the hardener, such as alkanolamine salts of acids, for example an alkanolamine salt of a sulfonic acid (see DeuroCure from the manufacturer Deurowood).
  • the latent hardener is preferably added to the resin immediately before the application unit in order to avoid premature curing of the resin and thus losses. Accordingly, preferably no central admixture of the hardener takes place, but rather an admixture of the variable amount of hardener only at the corresponding application units. This has the advantage that if the system malfunctions, the resin can remain in the lines longer without the hardener. Just the application units with resin hardener must be set specifically to the pot life of the system. This significantly reduces losses due to the resin hardener being pumped out at a standstill / malfunction.
  • the proportion of the hardener in the individual resin layers varies and can be between 0.5 to 1.5% by weight, preferably 0.7 to 1.3% by weight. It is particularly preferred that the proportion of hardener per resin application decreases in the direction of production; i.e. The proportion of hardener in the lower resin layers is greater than in the upper resin layers. By reducing the amount of hardener from the lower to the upper resin layers, the individual resin layers can be cured evenly in the KT press.
  • the first resin layer is applied in an amount between 10-100 g / m 2 , preferably 40-80 g / m 2 , particularly preferably 45-60 g / m 2 .
  • the first resin layer is applied, for example, with a grooved applicator roller in a first applicator.
  • the first resin layer can contain cellulose fibers or wood fibers, preferably cellulose fibers.
  • the viscosity of the resin to be applied can be adjusted by adding cellulose fibers and the application of the first cover layer to the wood-based panel can be increased.
  • the amount of cellulose fibers applied with the first resin layer can be between 0.1 and 1% by weight, preferably between 0.5 and 0.8% by weight (based on the amount of resin to be applied) or between 0.1-0. 5 g / m 2 , preferably 0.2-0.4 g / m 2 , particularly preferably 0.25 g / m 2 .
  • the cellulose fibers used with preference have a white color and are in the form of a fine or granular, slightly hygroscopic powder.
  • particles made of corundum (aluminum oxides), boron carbides, silicon dioxide, silicon carbide are used as wear-resistant particles.
  • Corundum particles are particularly preferred. This is preferably high-grade corundum (white) with high transparency so that the visual effect of the underlying decor is adversely affected as little as possible. Corundum has an uneven spatial shape.
  • the amount of scattered abrasion-resistant particles is 10 to 50 g / m 2 , preferably 10 to 30 g / m 2 , particularly preferably 15 to 25 g / m 2 .
  • the amount of abrasion-resistant particles sprinkled on depends on the abrasion class to be achieved and the grain size.
  • the amount of abrasion-resistant particles in the case of abrasion class AC3 is in the range between 10 to 15 g / m 2 , in the abrasion class AC4 between 15 to 20 g / m 2 and in the abrasion class AC5 between 20 to 25 g / m 2 when using the grain size F200.
  • the finished panels preferably have the abrasion class AC4.
  • Abrasion-resistant particles with grits in classes F180 to F240, preferably F200 are used.
  • the grain size of class F180 covers a range from 53 - 90 ⁇ m, F220 from 45-75 ⁇ m, F230 34-82 ⁇ m, F240 28-70 ⁇ m (FEPA norm).
  • high-grade corundum white F180 to F240 preferably in a main grain range of 53-90 ⁇ m, are used as wear-resistant particles.
  • corundum particles of class F200 are used, F200 being a mixture between F180 and F220 and having a diameter between 53 and 75 ⁇ m.
  • the abrasion-resistant particles must not be too fine-grained (risk of dust formation), but also not too coarse-grained. The size of the abrasion-resistant particles is therefore a compromise.
  • silanized corundum particles can be used.
  • Typical silanizing agents are aminosilanes.
  • the second resin layer to be applied to the top of the wood-based panel is applied in an amount between 10-50 g / m 2 , preferably 20-30 g / m 2 , particularly preferably 20-25 g / m 2 . Overall, the amount of the second resin layer is less than the amount of the first resin layer. In a preferred embodiment, the second resin layer to be applied to the top of the wood-based panel does not contain any glass balls.
  • the total amount of first and second resin layers is between 50-100 g / m 2 , preferably 60-80 g / m 2 , particularly preferably 70 g / m 2 .
  • the amount of the first resin layer is 50 g / m 2 and the amount of the second resin layer is 25 g / m 2 .
  • the abrasion-resistant particles in the second resin layer are enriched by loose particles being carried along by the second application unit.
  • a content of abrasion-resistant particles of 5 to 15% by weight, preferably 10% by weight, can be established in the resin to be applied as the second resin layer.
  • the amount of the third resin layer applied to the top of the wood-based panel can be between 10-50 g / m 2 , preferably 20-30 g / m 2 , particularly preferably 25 g / m 2 .
  • the third resin layer contains glass balls that act as spacers.
  • the glass balls used with preference have a diameter of 90-150 ⁇ m.
  • the glass balls can be applied together with the third resin layer or can be sprinkled separately onto the third resin layer.
  • the amount of glass spheres is 10 to 50 g / m 2 , preferably 10 to 30 g / m 2 , particularly preferably 15 to 25 g / m 2 .
  • the batch preferably consists of approx. 40 kg of liquid resin plus glass balls and auxiliary substances.
  • the glass beads can also be in silanized form. The embedding of the glass beads in the resin matrix is improved by the silanization of the glass beads.
  • the amount of the fourth resin layer applied to the top of the wood-based panel can be between 10-40 g / m 2 , preferably 15-30 g / m 2 , particularly preferably 20 g / m 2 .
  • the solids content of the fourth resin layer (as well as the fifth and sixth resin layers) is lower compared to the first to third resin layers.
  • the varying solids content of the resin layers to be applied enables on the one hand a higher total layer thickness due to the increased solids content in the first to third layers, and on the other hand the reduced solids content in the fourth to sixth resin layers ensures that the drying and pressing time is sufficient for the overall structure.
  • the amount of the fifth resin layer applied to the top of the wood-based panel can be between 10-40 g / m 2 , preferably 15-30 g / m 2 .
  • the fifth resin layer also contains glass balls.
  • the glass balls can be applied together with the third resin layer or can be sprinkled separately onto the third resin layer.
  • the glass balls are applied in an amount of 8 to 10 kg per application.
  • the sixth resin layer to be applied to the fifth resin layer after drying contains no glass balls.
  • the omission of glass balls in the sixth resin layer ensures that the underlying resin layers, which have already dried, are not destroyed and the surface of the resin structure does not appear torn.
  • the total layer thickness of the applied resin layers on the wood-based panel can be between 60 and 200 ⁇ m, preferably between 90 and 150 ⁇ m, particularly preferably between 100 and 120 ⁇ m.
  • the total layer thickness is thus significantly higher than the previous methods, with which layer thicknesses of up to 50 ⁇ m are typically achieved.
  • a resin layer is applied to the underside of the wood-based panel together with the second, third, fourth, fifth and sixth resin layer to be applied to the top of the wood-based panel.
  • a resin layer is also applied to the underside of the wood-based panel parallel to the second resin layer on the top of the wood-based panel.
  • the amount of the resin layer applied to the underside of the wood-based panel can be between 50-100 g / m 2 , preferably 60-80 g / m 2 , particularly preferably 60 g / m 2 .
  • the lower resin layer is preferably colored (for example brownish) in order to simulate a counter-movement.
  • the second resin layer is preferably applied in parallel or simultaneously to the top and bottom of the wood-based panel in at least one double application device (roller application unit). After application of the second resin layer, the structure of the first and second resin layers is dried (air-dried) in a first drying device.
  • a third, fourth, fifth and sixth resin layer is applied to the underside parallel to the top in parallel on the carrier plate and dried in each case after the application.
  • the resin layer (s) applied on the underside act as a countermove. Applying the resin layers to the top and bottom of the wood-based panels in approximately the same amounts ensures that the tensile forces created by the layers applied during the pressing onto the wood-based panel cancel each other out.
  • the backing applied to the underside corresponds approximately to the layer sequence applied to the top in the layer structure and the respective layer thickness, but without the addition of glass balls.
  • the resin layers are dried at dryer temperatures between 150 and 220 ° C., preferably between 180 and 210 ° C., in particular in a convection dryer.
  • the temperature is adapted to the respective resin layers and can vary in the individual convection dryers; For example, the temperature in the second, third and fourth convection dryers can be at 205 ° C. and in the fifth and sixth convection dryers 198 ° C. Instead of convection dryers, other dryers can also be used.
  • the layer structure is pressed under the influence of pressure and temperature in a short-cycle press at temperatures between 150 and 250 ° C, preferably between 180 and 230 ° C, particularly preferably at 200 ° C and a pressure between 30 and 60 kg / cm 2 , particularly preferably between 40 and 50 kg / cm 2 .
  • the pressing time is between 5 and 15 seconds, preferably between 7 and 10 seconds. In comparison: in the case of decorative papers, a pressure of 50-60 kg / cm 2 is applied for 16 seconds.
  • the coated wood-based panel is preferably aligned in the short-cycle press to a structured press plate located in the short-cycle press on the basis of markings on the wood-based panel, so that a congruence between the decor on the wood-based panel and the structure of the press plate to be embossed is produced.
  • This enables a decor-synchronous structure to be produced.
  • the melamine resin layers melt and a laminate is formed by a condensation reaction, including the components corundum / glass / fibers.
  • the at least one wood-based panel is a medium-density fiber (MDF), high-density fiber (HDF) or chipboard or coarse chipboard (OSB) or plywood panel and / or a wood-plastic panel.
  • MDF medium-density fiber
  • HDF high-density fiber
  • OSB coarse chipboard
  • an unsanded wood fiber board in particular MDF or HDF, is used, which is also provided with a press skin (rotting layer) on the top.
  • Aqueous melamine resin is applied to the top to fill the press skin.
  • the melamine resin is later melted in the short-cycle press and thus has a tempering effect on this layer; i.e. it counteracts delamination.
  • the decorative layer mentioned above can be applied by direct printing.
  • a water-based, pigmented printing ink is applied by gravure or digital printing, the water-based pigmented printing ink being able to be applied in more than one layer, for example in the form of two to ten layers, preferably three to eight layers.
  • the at least one decorative layer is applied as mentioned by means of an analog gravure and / or a digital printing process.
  • the gravure printing process is a printing technique in which the elements to be imaged are present as depressions in a printing form which is inked before printing.
  • the printing ink is mainly in the depressions and is due to the pressure of the printing form and adhesive forces on the object to be printed, e.g. a wood fiber board.
  • digital printing the print image is transferred directly from a computer to a printing press, e.g. transfer a laser printer or inkjet printer.
  • the use of a static printing form is not necessary. In both processes, the use of aqueous paints and inks or coloring agents based on UV is possible. It is also conceivable to combine the mentioned printing techniques from gravure and digital printing. A suitable combination of the printing techniques can take place either directly on the carrier plate or the layer to be printed or else before printing by adapting the electronic data records used.
  • the markings required for alignment in the press are also printed together with the decor.
  • At least one primer layer is arranged between the wood-based panel or carrier plate and the at least one decorative layer.
  • the primer layer is applied before printing.
  • the primer layer preferably used here comprises a composition of casein or soy protein as a binder and inorganic pigments, in particular inorganic color pigments.
  • White pigments such as titanium dioxide or other color pigments such as calcium carbonate, barium sulfate or barium carbonate can be used as color pigments in the primer layer.
  • the primer can also contain water as a solvent. It is also preferred if the pigmented base layer applied consists of at least one, preferably at least two, particularly preferably at least four layers or orders applied in succession, the application amount between the layers or orders being able to be the same or different.
  • the present method thus enables the production of an abrasion-resistant wood-based panel provided with a decorative layer with a resin structure with abrasion-resistant particles.
  • the wood-based panel comprises at least one decorative layer on the top and a multilayer resin structure containing abrasion-resistant particles, cellulose fibers and Glass spheres, the multilayer resin structure having a total layer thickness between 60 and 200 ⁇ m, preferably between 90 and 150 ⁇ m, particularly preferably between 100 and 120 ⁇ m.
  • the wood-based panel provided with a decorative layer comprises a resin structure consisting of a first and second abrasion-resistant particle-containing resin layer on the top, a corresponding resin layer on the underside, at least a third resin layer on the top and a corresponding resin layer on the underside of the wood-based panel, at least a fourth , fifth and sixth resin layers on the top and in each case corresponding resin layers on the underside of the wood-based panel, it being possible for glass balls to be contained in the third to fifth resin layers provided on the top of the wood-based panel.
  • the present method enables the production of an abrasion-resistant wood-based panel with the following layer structure (seen from bottom to top): counter-pull from six resin layers - wood-based panel - primer layer - print decorative layer - protective layer, in particular a protective layer from a resin that has not yet been fully cured - first resin layer with cellulose fibers - layer of abrasion-resistant particles - second resin layer - third resin layer with glass balls - fourth resin layer with glass balls - fifth resin layer with glass balls - sixth resin layer (without glass balls).
  • the protective layer serves to cover the decor and to protect the decor during intermediate storage (stacking, storage, transport).
  • the other layers of resin on the top form an overlay that protects the finished laminate against abrasion and enables decor-synchronized structuring.
  • no drying device is provided in front of the first application device, or in the event that a drying device is installed as part of the production line, this drying device is not in operation, i.e. not active.
  • the present production line overall comprises a simple, one-sided application unit for applying the first resin layer to the top of the printed wood-based panel and five double application units for applying five further resin layers to the top and bottom of the wood-based panel, with at least one drying device for drying behind each double application unit the upper and / or lower resin layer is provided.
  • the spreading device for the abrasion-resistant particles provided in the present production line is suitable for spreading powder, granules, fibers and comprises an oscillating brush system.
  • the spreader essentially consists of a hopper, a rotating, structured roller and a scraper.
  • the application quantity of abrasion-resistant material is determined via the speed of rotation of the roller.
  • the spreading device preferably comprises a spiked roller.
  • the at least one scattering device is surrounded or arranged in at least one cabin, which is provided with at least one means for removing dusts occurring in the cabin.
  • the means for removing the dusts can be designed in the form of a suction device or also as a device for blowing in air. Air can be blown in via nozzles that are installed at the plate inlet and outlet and blow air into the cabin. In addition, these can prevent air movements from creating an inhomogeneous scatter curtain of abrasion-resistant material.
  • the removal of the dust from abrasion-resistant material from the vicinity of the spreading device is advantageous because, in addition to the obvious health burden for the workers working on the production line, the fine dust from abrasion-resistant particles also deposits on other parts of the production line and leads to increased wear of the same.
  • the arrangement of the spreading device in a cabin is therefore not only used Reduction of health dust pollution around the production line, but also prevents premature wear.
  • the spreading device is preferably controlled by a light barrier, the light barrier being arranged in the processing direction in front of the roller (spreading roller) provided below the spreading device. It is advisable to control the spreading device by means of a light barrier, as there are more or less large gaps between the individual wood-based panels. This starts the spreading process as soon as a plate is in front of the spreading roller.
  • At least one hopper is provided in front of the spreading roller to catch excess abrasion-resistant particles (ie not sprinkled on the at least one wood-based panel, but rather before the wood-based panel is moved under the spreading roller in front of the same, before the same dropping down abrasion-resistant particles) .
  • the funnel is coupled to at least one conveying device and a screening device, the excess abrasion-resistant material collected in the hopper being transported to the screening device via the conveying device.
  • the sieve mesh of the sieve device corresponds to the largest grain of the abrasion-resistant particle material used (i.e. approx. 80-100 ⁇ m). Dirt particles and clumped material (such as clumped resin or clumped abrasion-resistant material) are separated from the collected abrasion-resistant material in the sieving device and the sieved abrasion-resistant material can be returned to the scattering device (recycled).
  • the hardener is specifically mixed with the liquid resin at the corresponding application units or application devices for the different resin layers.
  • at least one metering system is provided for this purpose for adding the hardener to each application device.
  • the hardener is pumped by the at least one dosing system into the reservoir for the resin and in the reservoir with the resin e.g. mixed using a suitable agitator
  • the in the Figure 1 schematically represented production line comprises an IR dryer 1a, which is switched off.
  • the removal of the IR dryer 1a from the production line prevents the electrostatic charging of the plate surface which otherwise takes place in the IR dryer, which enables the formation of a homogeneous scattering curtain of the corundum.
  • the production line also includes a single-sided application unit 1 (grooved roller) and five double application units 2, 3, 4, 5, 6 for simultaneous application of the respective resin layer on the top and bottom of the isolated printed material plates, e.g. of printed HDF boards and four convection dryers 2a, 3a, 4a, 5a, 6a arranged behind the application units in the processing direction.
  • a single-sided application unit 1 grooved roller
  • five double application units 2, 3, 4, 5, 6 for simultaneous application of the respective resin layer on the top and bottom of the isolated printed material plates, e.g. of printed HDF boards and four convection dryers 2a, 3a, 4a, 5a, 6a arranged behind the application units in the processing direction.
  • a first spreading device 20 is provided for uniformly spreading the abrasion-resistant material, such as corundum, onto the first resin layer on the top of the HDF board.
  • Corundum F200 is used as an abrasion-resistant material, which measures approximately 53-75 ⁇ m in diameter according to the FEPA standard.
  • the corundum falls from the spiked roller at a distance of 5 cm onto the plate treated with melamine resin. Since the first resin layer is still liquid at the time of spreading, the abrasion-resistant particles can sink into the resin layer.
  • Under the present spreading device there is at least one hopper (not shown) in front of the spreading roller for collecting excess abrasion-resistant particles (ie not sprinkled on the at least one wood-based panel, but rather before the wood-based panel is moved in with the transport device under the spreading roller in front of the falling down abrasion-resistant particles ) intended.
  • the plate coated with melamine-formaldehyde resin and corundum is coated with further melamine-formaldehyde resin (about 20 g / m 2 ).
  • the unattached corundum is removed in small quantities and accumulates in the melamine resin liquor until it is saturated (about 10% by weight).
  • This lost portion of the corundum is now continuously reapplied to the plate by the roller application of the application unit 1-1.
  • the corundum grains become liquid Resin covered or incorporated into the overlay layer. This prevents the corundum from being removed in the convection dryer due to the high air turbulence.
  • the structure of the first and second resin layers is dried in the convection dryer 2a.
  • the third double application unit 3 for applying the third resin layer can be followed by a further scattering device 20 for applying glass balls to the third resin layer, followed by a third convection dryer 3a for drying the third resin layer.
  • the scattering device 20 for the glass balls is optional.
  • the glass balls can also be applied together with the third resin layer.
  • the layer structure is applied in a short cycle press 7 at a pressing temperature of 180-220 ° C and a pressing time of 8 cured for up to 10 seconds under a specific pressure of 40 kg / cm 2 .
  • the pressed plates are cooled and stored.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Laminated Bodies (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Load-Bearing And Curtain Walls (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
EP19153016.1A 2019-01-22 2019-01-22 Procédé de fabrication d'une plaque résistante à l'abrasion en matériau dérivé du bois Active EP3686028B1 (fr)

Priority Applications (16)

Application Number Priority Date Filing Date Title
PT191530161T PT3686028T (pt) 2019-01-22 2019-01-22 Processo para o fabrico de um painel de derivados de madeira resistente à abrasão
EP19153016.1A EP3686028B1 (fr) 2019-01-22 2019-01-22 Procédé de fabrication d'une plaque résistante à l'abrasion en matériau dérivé du bois
ES19153016T ES2870156T3 (es) 2019-01-22 2019-01-22 Procedimiento para la fabricación de un tablero de material derivado de la madera resistente a la abrasión
PL19153016T PL3686028T3 (pl) 2019-01-22 2019-01-22 Sposób wytwarzania odpornej na ścieranie płyty drewnopochodnej
US17/424,696 US11440341B2 (en) 2019-01-22 2020-01-08 Method for producing an abrasion-resistant wood board
EP20701257.6A EP3914459A1 (fr) 2019-01-22 2020-01-08 Procédé pour la fabrication d'un panneau de bois résistant à l'abrasion
AU2020210473A AU2020210473B2 (en) 2019-01-22 2020-01-08 Method for producing an abrasion-resistant wood board
JP2021542353A JP7033696B2 (ja) 2019-01-22 2020-01-08 耐摩耗性木質ボードの製造方法
CN202310262456.4A CN116198253A (zh) 2019-01-22 2020-01-08 人造板和用于制造人造板的生产线
CN202080010411.2A CN113365850B (zh) 2019-01-22 2020-01-08 用于制造耐磨人造板的方法
RU2021120971A RU2767202C1 (ru) 2019-01-22 2020-01-08 Способ изготовления износостойкой плиты на основе древесного материала
RU2022102592A RU2022102592A (ru) 2019-01-22 2020-01-08 Способ изготовления износостойкой плиты на основе древесного материала
PCT/EP2020/050300 WO2020151949A1 (fr) 2019-01-22 2020-01-08 Procédé pour la fabrication d'un panneau de bois résistant à l'abrasion
CA3127265A CA3127265C (fr) 2019-01-22 2020-01-08 Procede pour la fabrication d'un panneau de bois resistant a l'abrasion
US17/816,754 US11872837B2 (en) 2019-01-22 2022-08-02 Abrasion-resistant wood board
AU2022259724A AU2022259724B2 (en) 2019-01-22 2022-10-25 Method for producing an abrasion-resistant wood board

Applications Claiming Priority (1)

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EP19153016.1A EP3686028B1 (fr) 2019-01-22 2019-01-22 Procédé de fabrication d'une plaque résistante à l'abrasion en matériau dérivé du bois

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EP20701257.6A Pending EP3914459A1 (fr) 2019-01-22 2020-01-08 Procédé pour la fabrication d'un panneau de bois résistant à l'abrasion

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US (2) US11440341B2 (fr)
EP (2) EP3686028B1 (fr)
JP (1) JP7033696B2 (fr)
CN (2) CN116198253A (fr)
AU (2) AU2020210473B2 (fr)
CA (1) CA3127265C (fr)
ES (1) ES2870156T3 (fr)
PL (1) PL3686028T3 (fr)
PT (1) PT3686028T (fr)
RU (2) RU2767202C1 (fr)
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Cited By (1)

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AU2022259724B2 (en) 2024-05-30
CN113365850A (zh) 2021-09-07
CN116198253A (zh) 2023-06-02
US11440341B2 (en) 2022-09-13
PT3686028T (pt) 2021-05-05
RU2767202C1 (ru) 2022-03-16
AU2022259724A1 (en) 2022-12-01
JP2022516810A (ja) 2022-03-02
RU2022102592A (ru) 2022-03-02
US11872837B2 (en) 2024-01-16
EP3914459A1 (fr) 2021-12-01
US20220097445A1 (en) 2022-03-31
JP7033696B2 (ja) 2022-03-10
CN113365850B (zh) 2023-04-04
WO2020151949A1 (fr) 2020-07-30
CA3127265C (fr) 2023-02-14
ES2870156T3 (es) 2021-10-26
US20220363089A1 (en) 2022-11-17
AU2020210473A1 (en) 2021-07-22
PL3686028T3 (pl) 2021-10-25
AU2020210473B2 (en) 2022-07-28
EP3686028B1 (fr) 2021-02-17
CA3127265A1 (fr) 2020-07-30

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