EP3686028B1 - Verfahren zur herstellung einer abriebfesten holzwerkstoffplatte - Google Patents

Verfahren zur herstellung einer abriebfesten holzwerkstoffplatte Download PDF

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Publication number
EP3686028B1
EP3686028B1 EP19153016.1A EP19153016A EP3686028B1 EP 3686028 B1 EP3686028 B1 EP 3686028B1 EP 19153016 A EP19153016 A EP 19153016A EP 3686028 B1 EP3686028 B1 EP 3686028B1
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EP
European Patent Office
Prior art keywords
resin layer
resin
weight
wood
abrasion
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Active
Application number
EP19153016.1A
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German (de)
English (en)
French (fr)
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EP3686028A1 (de
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.)
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Publication date
Priority to EP19153016.1A priority Critical patent/EP3686028B1/de
Application filed by Flooring Technologies Ltd filed Critical Flooring Technologies Ltd
Priority to ES19153016T priority patent/ES2870156T3/es
Priority to PT191530161T priority patent/PT3686028T/pt
Priority to PL19153016T priority patent/PL3686028T3/pl
Priority to CA3127265A priority patent/CA3127265C/en
Priority to JP2021542353A priority patent/JP7033696B2/ja
Priority to CN202080010411.2A priority patent/CN113365850B/zh
Priority to PCT/EP2020/050300 priority patent/WO2020151949A1/de
Priority to CN202310262456.4A priority patent/CN116198253A/zh
Priority to US17/424,696 priority patent/US11440341B2/en
Priority to EP20701257.6A priority patent/EP3914459A1/de
Priority to AU2020210473A priority patent/AU2020210473B2/en
Priority to RU2021120971A priority patent/RU2767202C1/ru
Priority to RU2022102592A priority patent/RU2022102592A/ru
Publication of EP3686028A1 publication Critical patent/EP3686028A1/de
Application granted granted Critical
Publication of EP3686028B1 publication Critical patent/EP3686028B1/de
Priority to US17/816,754 priority patent/US11872837B2/en
Priority to AU2022259724A priority patent/AU2022259724A1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • 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 wood-based panel provided with a structure that is synchronous with the decor.
  • a large number of products or product surfaces that are exposed to wear and tear due to mechanical stress must be protected against premature damage or destruction through wear by applying wear-inhibiting layers.
  • These products can be e.g. B. to furniture, interior construction panels, floors, etc. act.
  • different protective measures must be applied so that the user can be guaranteed the longest possible service life.
  • 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 consists in applying or introducing abrasion-resistant particles into the resin layers close to the surface. This can be done, for example, by applying a liquid resin containing abrasion-resistant particles to the corresponding surfaces, with corundum particles usually being used as abrasion-resistant particles in the case of decorative wood-based panels.
  • the abrasion-resistant particles can also be sprinkled on by means of a suitable device.
  • the present invention is therefore based on the technical problem of ensuring, in addition to reliably achieving high abrasion values, in particular of the abrasion classes AC4 to AC6, at the same time a low level of pressed sheet metal wear.
  • This should be achieved above all for a process in which printed plates are processed in a wide variety of formats. If possible, the process should be simplified and at least cost neutral. The disadvantages already discussed should, if possible, no longer occur through 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 that 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 non-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 uniformly sprinkled 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 applicator in the processing direction behind the spreader (ie between the first dryer and the spreader). With its roller application, the additionally built-in applicator picks up the abrasion-resistant particles that are not attached to the first resin layer or which have not penetrated the first resin layer and transports them back into the resin applicator. An equalizing concentration is established there and the abrasion-resistant particles removed are evenly applied to the next surfaces via the roller. It's coming thus an enrichment of the abrasion-resistant particles in the second application unit up to an abrasion-resistant particle content of max. 10%. This prevents loose particles from being blown away or picked up in the dryer.
  • the abrasion-resistant particles are covered by the present layer structure of resin layers with increased solids content and conventional, normal solids content, cellulose fibers and glass spheres and no longer protrude from the coated surface. In this way, the negative effect, e.g. on a subsequent press plate, of corundum particles protruding from the coated surface can be reduced 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. There is also no need to install new devices / devices in the production line.
  • the present layer structure also enables the embossing of structures that are synchronous to the decor using more deeply structured press plates. This is made possible by the thickness of the overall 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 on the basis of the recorded sheet life.
  • the wood-based panel provided with the decorative layer is not heated in a dryer, such as an IR dryer, before the first resin layer is applied. This can be done by switching off an IR dryer provided in the production line, or no IR dryer is provided in the production line.
  • a dryer such as 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 spheres (size 50-150 ⁇ ) as spacers for the intermediate storage of the panels.
  • This protective layer is used to temporarily protect the decorative layer for storage before further finishing.
  • the protective layer on the decorative layer has not yet fully cured, but has a certain residual moisture content of approx. 10%, preferably approx. 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 is used to dry the protective layer and to set the residual moisture level 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. Omitting the heating of the printed wood-based panel provided with a protective layer brings about a homogenization of the spreading pattern 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 hardener, such as alkanolamine salts of acids, e.g. 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 hardening of the resin and thus losses. Accordingly, there is preferably no central admixing of the hardener, but rather an admixing of the variable amount of hardener only at the corresponding application units. This has the advantage that if the system fails, the resin can remain in the lines longer without the hardener. Only the application units with resin hardener have to be specifically adjusted to the pot life of the system. In this way, losses caused by pumping out resin hardener in the event of a standstill / malfunction can be significantly reduced.
  • the proportion of 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 production direction; 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 hardened 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 application roller in a first application unit.
  • the first resin layer can contain cellulose fibers or wood fibers, preferably cellulose fibers. By adding cellulose fibers, the viscosity of the resin to be applied can be adjusted and the application of the first cover layer to the wood-based panel can be increased.
  • the amount of cellulose fibers that is 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 are white in color and are in the form of a fine or granular, slightly hygroscopic powder.
  • the abrasion-resistant particles used are corundum particles (aluminum oxides), boron carbides, silicon dioxides, silicon carbides. Corundum particles are particularly preferred. This is more preferred Way around fine corundum (white) with a high level of transparency, so that the optical effect of the underlying decoration is adversely affected as little as possible. Corundum has an uneven spatial shape.
  • the amount of abrasion-resistant particles scattered on 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 scattered 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 abrasion class AC4 between 15 to 20 g / m 2 and in abrasion class AC5 between 20 to 25 g / m 2 when used the grit F200.
  • the finished panels preferably have abrasion class AC4.
  • Abrasion-resistant particles with grain sizes 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 standard).
  • white aluminum oxide F180 to F240 preferably in a main grain range of 53-90 ⁇ m, are used as abrasion-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 spheres.
  • the total amount of first and second resin layer is between 50-100 g / m 2 , preferably 60-80 g / m 2 , particularly preferably 70 g / m 2 . In one variant, 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 accumulate in the second resin layer due to the entrainment of loose particles by the second applicator.
  • the resin to be applied as the second resin layer can have an abrasion-resistant particle content of 5 to 15% by weight, preferably 10% by weight.
  • 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 spheres that act as spacers.
  • the glass spheres that are preferably used have a diameter of 90-150 ⁇ m.
  • the glass spheres can be applied together with the third resin layer or separately sprinkled 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 approach preferably consists of approx. 40 kg of liquid resin plus glass balls and auxiliary materials.
  • the glass beads can also be present in silanized form. The silanization of the glass beads improves the embedding of the glass beads in the resin matrix.
  • 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; 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 glass spheres.
  • the glass spheres can be applied together with the third resin layer or separately sprinkled onto the third resin layer.
  • the sixth resin layer to be applied to the fifth resin layer after drying does not contain any glass spheres.
  • the omission of glass spheres 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 thickness of the resin layers applied to 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 well above 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 upper side of the wood-based panel.
  • the amount of 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 (eg brownish) in order to simulate a counter-pull.
  • 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 the second resin layer has been applied, 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 are applied to the underside parallel to the upper side in double applicators on the carrier plate and each dried after the application.
  • the resin layer (s) applied to the underside act as a counterweight.
  • the layer structure and the respective layer thickness of the backing applied to the underside approximately correspond to the layer sequence applied to the upper side, but without the addition of glass spheres.
  • 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; e.g. the temperature in the second, third and fourth convection dryers can be 205 ° C and in the fifth and sixth convection dryers each can be 198 ° C.
  • convection dryers instead of convection dryers, however, 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.
  • 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 with a structured press plate located in the short-cycle press using markings on the wood-based panel so that congruence between the decoration on the wood-based panel and the structure of the press plate to be embossed is produced.
  • This enables the creation of a decor-synchronous structure.
  • 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
  • a non-sanded wood fiber board in particular MDF or HDF, is used, which is also provided with a pressed skin (rotting layer) on the upper side.
  • Aqueous melamine resin is applied to the top, around the pressed skin to fill. The melamine resin is later melted in the short-cycle press and thus has a compensatory effect in the area of this layer; ie it counteracts delamination.
  • the decorative layer already mentioned above can be applied by direct printing.
  • a water-based, pigmented printing ink is applied in gravure or digital printing, the water-based pigmented printing ink being applicable in more than one layer, e.g. in the form of two to ten layers, preferably three to eight layers.
  • the application of the at least one decorative layer takes place, as mentioned, by means of an analog gravure printing and / or a digital printing method.
  • Gravure printing is a printing technique in which the elements to be imaged are present as depressions in a printing form that is colored before printing.
  • the printing ink is mainly located in the depressions and is transferred to the object to be printed, such as a wood fiber carrier plate, due to the pressure of the printing form and the adhesive forces.
  • the print image is transferred directly from a computer to a printing machine, such as a laser printer or inkjet printer. There is no need to use a static printing form. In both processes, the use of water-based paints and inks or UV-based coloring agents is possible. It is also conceivable to combine the aforementioned printing techniques from gravure and digital printing. A suitable combination of the printing techniques can take place on the one hand directly on the carrier plate or on 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 be used alongside the Color pigments and casein or soy protein still 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 successively applied layers or applications, the amount applied between the layers or applications being the same or different.
  • the present method thus enables the production of an abrasion-resistant wood-based panel provided with a decorative layer and having a resin structure with abrasion-resistant particles.
  • the wood-based panel comprises at least one decorative layer on the top and a multi-layer resin structure containing abrasion-resistant particles, cellulose fibers and glass spheres, the multi-layer 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 of a first and second resin layer, each containing abrasion-resistant particles, on the top, a corresponding resin layer on the underside, at least one 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 layer on the top and respective corresponding resin layers on the underside of the wood-based panel, wherein the third to fifth resin layer provided on the top of the wood-based panel can contain glass spheres.
  • the present method enables the production of an abrasion-resistant wood-based panel with the following layer structure (viewed from bottom to top): counter-layer made of six resin layers - wood-based panel - primer layer - printed decorative layer - protective layer, in particular a protective layer made of a resin that has not yet 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 decoration and to protect the decoration during intermediate storage (stacking, storage, transport).
  • the additional resin layers on the top form an overlay that protects the finished laminate against abrasion and enables structuring that is synchronized with the decor.
  • 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 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 behind each double application unit for drying the upper and / or lower resin layer is provided.
  • the scattering device for the abrasion-resistant particles provided in the present production line is suitable for scattering powder, granules, fibers and comprises an oscillating brush system.
  • the spreading device essentially consists of a storage hopper, a rotating, structured roller and a scraper. The amount of abrasion-resistant material applied is determined by the rotational speed of the roller.
  • the spreading device preferably comprises a spiked roller.
  • the at least one spreading device is surrounded or is 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 dust can be in the form of a Suction device or also be designed as a device for blowing air.
  • the injection of air can be achieved via nozzles that are installed at the plate inlet and outlet and blow air into the booth. In addition, these can prevent air movements from creating an inhomogeneous curtain of abrasion-resistant material.
  • the removal of the dust from abrasion-resistant material from the environment of the spreading device is advantageous because, in addition to the obvious health problems for the workers working on the production line, the fine dust from abrasion-resistant particles is also deposited on other parts of the production line and leads to increased wear and tear on the same.
  • the arrangement of the spreading device in a booth therefore not only serves to reduce the dust pollution in the vicinity of the production line, but also prevents premature wear.
  • the scattering device is preferably controlled by a light barrier, the light barrier being arranged in the processing direction in front of the roller (scattering roller) provided below the scattering device.
  • the control of the spreading device by a light barrier makes sense because 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 funnel is provided in front of the spreading roller to collect excess abrasion-resistant particles (i.e. not scattered on the at least one wood-based panel, but rather before the wood-based panel is inserted with the aid of the transport device under the spreading roller in front of the same, abrasion-resistant particles that fall down) .
  • the funnel is coupled to at least one conveyor device and a screening device, the excess abrasion-resistant material collected in the funnel being transported to the screening device via the conveyor device.
  • the sieve mesh of the sieve device corresponds to the largest grain of abrasion-resistant particulate material used (ie approx. 80-100 ⁇ m).
  • dirt particles and lumpy material are separated from the collected abrasion-resistant material and the screened abrasion-resistant material can be returned to the spreader (recycled).
  • the hardener is also made for the hardener to be mixed into the liquid resin in a targeted manner at the corresponding application units or application devices for the various resin layers.
  • at least one metering system is provided for adding the hardener to each application device.
  • the hardener is pumped from the at least one metering system into the reservoir for the resin and mixed with the resin in the reservoir, for example by means of a suitable agitator
  • the production line shown schematically comprises an IR dryer 1a which is switched off.
  • the removal of the IR dryer 1a from the production line avoids the electrostatic charging of the plate surface that otherwise takes place in the IR dryer, which enables the formation of a homogeneous curtain of scattering 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 the simultaneous application of the respective resin layer on the top and bottom of the individual printed material panels, e.g. of printed HDF panels as well as each four convection dryers 2a, 3a, 4a, 5a, 6a arranged in the processing direction behind the application units.
  • a single-sided application unit 1 grooved roller
  • five double application units 2, 3, 4, 5, 6 for the simultaneous application of the respective resin layer on the top and bottom of the individual printed material panels, e.g. of printed HDF panels as well as each four convection dryers 2a, 3a, 4a, 5a, 6a arranged in the processing direction behind the application units.
  • a first scattering device 20 is provided for uniformly scattering the abrasion-resistant material such as corundum onto the first resin layer on the upper side of the HDF board.
  • Corundum F200 is used as an abrasion-resistant material, which measures around 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 scattering, the abrasion-resistant particles can get into the resin layer sink in.
  • the plate coated with melamine-formaldehyde resin and corundum is coated with further melamine-formaldehyde resin (about 20 g / m 2 ).
  • the non-attached corundum is removed in small amounts and accumulates in the melamine resin liquor until it is saturated (approx. 10% by weight).
  • This lost portion of the corundum is now continuously applied again to the plate by the roller application of the applicator unit 1-1.
  • the corundum grains are covered with liquid resin or worked into the overlay layer. This prevents the corundum from being removed in the convection dryer due to the high level of air turbulence.
  • the structure of the first and second resin layers is dried in the convection dryer 2a.
  • the third double applicator 3 for applying the third resin layer can be followed by a further scattering device 20 for applying glass spheres onto 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 up to 10 seconds under a specific pressure of 40 kg / cm 2 .
  • the pressed panels are cooled and stored.
EP19153016.1A 2019-01-22 2019-01-22 Verfahren zur herstellung einer abriebfesten holzwerkstoffplatte Active EP3686028B1 (de)

Priority Applications (16)

Application Number Priority Date Filing Date Title
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
PT191530161T PT3686028T (pt) 2019-01-22 2019-01-22 Processo para o fabrico de um painel de derivados de madeira resistente à abrasão
PL19153016T PL3686028T3 (pl) 2019-01-22 2019-01-22 Sposób wytwarzania odpornej na ścieranie płyty drewnopochodnej
EP19153016.1A EP3686028B1 (de) 2019-01-22 2019-01-22 Verfahren zur herstellung einer abriebfesten holzwerkstoffplatte
US17/424,696 US11440341B2 (en) 2019-01-22 2020-01-08 Method for producing an abrasion-resistant wood board
CN202080010411.2A CN113365850B (zh) 2019-01-22 2020-01-08 用于制造耐磨人造板的方法
PCT/EP2020/050300 WO2020151949A1 (de) 2019-01-22 2020-01-08 Verfahren zur herstellung einer abriebfesten holzwerkstoffplatte
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
CA3127265A CA3127265C (en) 2019-01-22 2020-01-08 Method for producing an abrasion-resistant wood board
EP20701257.6A EP3914459A1 (de) 2019-01-22 2020-01-08 Verfahren zur herstellung einer abriebfesten holzwerkstoffplatte
AU2020210473A AU2020210473B2 (en) 2019-01-22 2020-01-08 Method for producing an abrasion-resistant wood board
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
JP2021542353A JP7033696B2 (ja) 2019-01-22 2020-01-08 耐摩耗性木質ボードの製造方法
US17/816,754 US11872837B2 (en) 2019-01-22 2022-08-02 Abrasion-resistant wood board
AU2022259724A AU2022259724A1 (en) 2019-01-22 2022-10-25 Method for producing an abrasion-resistant wood board

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EP19153016.1A EP3686028B1 (de) 2019-01-22 2019-01-22 Verfahren zur herstellung einer abriebfesten holzwerkstoffplatte

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US20220363089A1 (en) 2022-11-17
JP2022516810A (ja) 2022-03-02
PL3686028T3 (pl) 2021-10-25
AU2020210473B2 (en) 2022-07-28
JP7033696B2 (ja) 2022-03-10
EP3686028A1 (de) 2020-07-29
AU2020210473A1 (en) 2021-07-22
US20220097445A1 (en) 2022-03-31
RU2767202C1 (ru) 2022-03-16
EP3914459A1 (de) 2021-12-01
CA3127265C (en) 2023-02-14
PT3686028T (pt) 2021-05-05
CN116198253A (zh) 2023-06-02
US11440341B2 (en) 2022-09-13
ES2870156T3 (es) 2021-10-26
CN113365850B (zh) 2023-04-04
US11872837B2 (en) 2024-01-16
RU2022102592A (ru) 2022-03-02
WO2020151949A1 (de) 2020-07-30
CA3127265A1 (en) 2020-07-30
CN113365850A (zh) 2021-09-07
AU2022259724A1 (en) 2022-12-01

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