EP4166294A1 - Procédé de fabrication d'une plaque en matériau dérivé du bois et dispositif de fabrication de plaques en matériau dérivé du bois - Google Patents

Procédé de fabrication d'une plaque en matériau dérivé du bois et dispositif de fabrication de plaques en matériau dérivé du bois Download PDF

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Publication number
EP4166294A1
EP4166294A1 EP21203262.7A EP21203262A EP4166294A1 EP 4166294 A1 EP4166294 A1 EP 4166294A1 EP 21203262 A EP21203262 A EP 21203262A EP 4166294 A1 EP4166294 A1 EP 4166294A1
Authority
EP
European Patent Office
Prior art keywords
liquid
wood
based panel
flame retardant
concentration
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.)
Pending
Application number
EP21203262.7A
Other languages
German (de)
English (en)
Inventor
Joachim Hasch
Norbert Kalwa
Georg Seidack
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.)
Swiss Krono Tec AG
Original Assignee
Swiss Krono Tec AG
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 Swiss Krono Tec AG filed Critical Swiss Krono Tec AG
Priority to EP21203262.7A priority Critical patent/EP4166294A1/fr
Priority to PCT/EP2022/078655 priority patent/WO2023066802A1/fr
Publication of EP4166294A1 publication Critical patent/EP4166294A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02—Processes; Apparatus
    • B27K3/0278—Processes; Apparatus involving an additional treatment during or after impregnation
    • B27K3/0285—Processes; Apparatus involving an additional treatment during or after impregnation for improving the penetration of the impregnating fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02—Processes; Apparatus
    • B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/16—Inorganic impregnating agents
    • B27K3/166—Compounds of phosphorus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B27K5/02—Staining or dyeing wood; Bleaching wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N9/00—Arrangements for fireproofing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
    • B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
    • B30B5/06—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K2240/00—Purpose of the treatment
    • B27K2240/30—Fireproofing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/24—Moulding or pressing characterised by using continuously acting presses having endless belts or chains moved within the compression zone

Definitions

  • the invention relates to a method for producing a wood-based panel.
  • the invention relates to a wood-based panel manufacturing device with (a) a press, in particular a belt press, for pressing at least one layer of pre-products to form a raw wood-based panel, (b) a liquid application device for applying a liquid to the raw wood material board and (c) a suction device which is designed to apply a vacuum to a side surface of the raw wood material board.
  • Such methods and wood-based panel manufacturing devices are known and are used to manufacture wood-based panels.
  • renewable raw materials such as wood as building materials, it is often required that they are flame-retardant.
  • the production of flame-retardant wood-based panels has been known for several decades.
  • the preliminary products for example wood chips, wood fibers or coarse chips, are treated with a liquid containing a flame retardant before the preliminary product layer is produced from the preliminary products. This is done by spraying the preliminary products in mixers, glue drums (coils) or blow lines. After that, the preliminary products are scattered onto a belt, so that at least one layer of preliminary products is created. Then the pre-product layer is pressed into a wood-based panel.
  • the object of the invention is to improve the production of flame-retardant wood-based material panels.
  • the invention solves the problem by a method for producing a wood-based material board with the steps (a) producing, in particular by pressing wood-containing precursors, a raw wood-based material board which has a first side surface and a second side surface which runs parallel to the first side surface, (b) applying a liquid containing a flame retardant at least to the first side surface and (c) applying a negative pressure to the second side surface, so that the liquid containing the flame retardant is sucked into the raw wood-based panel, in particular in an edge zone, so that the wood-based panel is formed.
  • the invention also solves the problem by means of a generic wood-based panel production device, in which the liquid contains a flame retardant and in which the suction device is designed to automatically apply the negative pressure for such a suction time that the liquid containing the flame retardant is sucked into an edge zone of the raw wood-based panel, but not sucked through the raw wood-based panel.
  • the invention solves the problem with a wood-based panel that has an in particular continuous concentration gradient of flame retardant, the flame retardant concentration decreasing with increasing distance from a surface to a center of the wood-based panel. It is favorable if the wood-based panel is flame-retardant according to the requirement standard DIN EN 13501-1:2010 and test standard DIN EN 13823:2015.
  • the wood-based panel is a wood-based panel of class B, in particular B -s1 or B -s1 d0, or C, in particular C-s1, C-s1 d0, or B fl , in particular B fl -s1 or B fl - s1 d0, or C fl , in particular C fl -s1, C fl -s1 D0, or in class B1, B2 or B3.
  • the content of flame retardant in the wood-based panel can often be adjusted with a high level of process reliability. This reduces scrap compared to prior art methods.
  • Another advantage of the invention is that the consumption of flame retardants can generally be reduced.
  • flame retardants are lost when the pre-products are sprayed and when the sprayed pre-products are later transported. There are often losses of more than 20% of flame retardant.
  • the introduction of the flame retardant generally does not lead to an increase in the moisture content of the comminuted primary products.
  • a high moisture content can lead to so-called steam cracking in the press, which is undesirable.
  • a steam splitter is an area where the engineered wood board has cracked due to evaporating water.
  • the method according to the invention can also be carried out, at least in principle, independently of the time and place of production of the raw wood-based material board. It is thus possible to subsequently make non-flame-retardant raw wood-based panels that have already been produced flame-retardant.
  • the flame retardant is applied to the raw wood-based panel that has already been pressed.
  • the raw wood-based material board is stored and/or moved after pressing for a longer period of time, in particular at least one minute, in particular at least 10 minutes, before the liquid containing the flame retardant is applied.
  • the raw wood-based panels are stored in a star cooler.
  • the liquid application device is arranged in the vicinity of the press.
  • a distance between the liquid application device and the press is preferably at most 100 m, or at most 50 m, in particular at most 30 m.
  • a raw wood-based material board is understood to mean, in particular, a board made of a wood-based material that can be processed into a wood-based material board by introducing the flame retardant.
  • the application of the liquid is understood in particular to mean that the liquid is brought into contact with the first side surface.
  • a liquid film preferably forms on the side surface.
  • the edge zone is understood as meaning a region of the raw wood-based panel that is delimited on the one hand by a side surface and on the other hand does not extend to the center of the wood-based panel.
  • the feature that the liquid is sucked into the edge zone means in particular that it is possible, but not necessary, for the liquid to be sucked exclusively into the edge zone.
  • the raw wood-based panel is, for example, a medium-density fibreboard (MDF board), a high-density fibreboard (HDF board), a oriented strand board (OSB board), a chipboard, a plywood board, a soft fibreboard, a hard fibreboard, flexible plywood board, a multiplex board, blockboard, laminboard, laminated wood board, low bulk density fibreboard (LDF board) or an insulation board.
  • MDF board medium-density fibreboard
  • HDF board high-density fibreboard
  • OSB board oriented strand board
  • chipboard a plywood board, a soft fibreboard, a hard fibreboard, flexible plywood board, a multiplex board, blockboard, laminboard, laminated wood board, low bulk density fibreboard (LDF board) or an insulation board.
  • a thickness of the wooden board is preferably at least 6 mm, in particular at least 10 mm, particularly preferably at least 15 mm, particularly preferably at least 20 mm.
  • the thickness of the wood-based material board is preferably at most 50 mm, in particular at most 30 mm, in particular at most 28 mm, preferably at most 25 mm.
  • the flame retardant containing liquid contains a flame retardant.
  • the liquid is an aqueous liquid. It is favorable if the flame retardant contains phosphorus.
  • the flame retardant can contain organic and/or inorganic phosphorus compounds, for example phosphate, polyphosphate, phosphonate and/or a guanidine salt. It is possible that the flame retardant is based on melamine or melamine derivatives, aluminum hydroxide or alkali sulfates. However, it is preferred that the boron content of the flame retardant is at most one percent by weight.
  • the flame retardant preferably contains ammonium.
  • the wood-based panel produced is preferably flame-retardant in accordance with DIN EN 13501-1:2010.
  • the wood-based panel produced has the properties of a wood-based panel according to the invention.
  • the raw density of the raw wood-based panel and/or the wood-based panel is at least 550 kg/cubic meter, in particular at least 600 kg/cubic meter.
  • the bulk density of the raw wood-based panel and/or the wood-based panel is at most 1000 kg/cubic meter, in particular at most 800 kg/cubic meter.
  • the bulk density of the raw wood-based material panels is below 350 kg/cubic meter, for example below 300 kg/cubic meter. This is particularly the case when the raw wood-based panel is an insulating panel.
  • the application of the liquid containing the flame retardant and/or the application of the negative pressure can take place both when the raw wood-based panel is in motion and when it is stationary.
  • the negative pressure is preferably applied in such a way that an internal concentration of flame retardant in an internal thickness quintile of a thickness extension from the first side surface to the second side surface of the wood-based panel is at most 0.8 times an external concentration in a first outermost thickness quintile, which extends to the first side surface is. It is favorable if the internal concentration is at most 0.7 times, in particular 0.6 times, preferably 0.5 times, particularly preferably 0.4 times, in particular 0.3 times, particularly preferably 0.2 times, for example at most 0.1 times, the external concentration.
  • a cuboid with a base measuring 5 cm by 5 cm is first cut out of the wood-based panel.
  • the base runs parallel to the first side surface.
  • slices are cut off on both sides parallel to the side surface, the thickness of which is 0.2 times the thickness of the wood-based panel.
  • the mass of flame retardant is determined on the sample obtained in this way and divided by the total mass of the sample. This gives the inside concentration.
  • the outside concentration results from analysis of the material of a disk with a thickness of 0.2 times the thickness of the wood-based panel, with one side of the disk being the first side face.
  • the concentration of flame retardants in at least one top layer is at least 65% higher, preferably at least 50% higher, in particular at least 100% higher than the concentration of flame retardants in a middle layer.
  • the middle layer is arranged between the two top layers.
  • the top layer is created from a layer of pre-products that has been spread separately from another layer, from which the middle layer is formed when pressed.
  • the liquid is applied in such a way that the edge zone of at least 80%, in particular at least 90%, of a side surface area of the wood-based panel contains flame retardants. In other words, this means that at most 10% of the wood-based panel does not contain any flame retardant in its edge zone. This reduces the amount of material board that has to be discarded because it does not contain sufficient flame retardant.
  • the flame retardant is also introduced outside the edge area of the wood-based panel.
  • the edge area includes all points of the wood-based panel whose distance to the edge of the wood-based panel is no more than 10 cm.
  • the liquid can be applied by spraying, rinsing, spreading, rolling, pouring or other application.
  • the spraying can take place, for example, by means of excess pressure, with the liquid being pressed through a nozzle.
  • spraying can be done by atomization.
  • the liquid can be applied to a moving body, in particular a rotating or vibrating body, so that droplets form.
  • a concentration of flame retardant in the liquid corresponds to at least half, in particular at least 65%, of the solubility of the flame retardant.
  • the flame retardant has a solubility that can be measured, for example, in grams per liter. This solubility is the maximum mass of flame retardant that can be in solution per unit volume of liquid.
  • the concentration of the flame retardant in the liquid is at least half of this solubility. This means that only a small amount of liquid has to be applied to the raw wood-based panel.
  • the quotient of the actual concentration according to DIN 1310 of the flame retardant and the solubility is at least 0.5, in particular at least 0.65, preferably at least 0.75.
  • a concentration of flame retardant in the liquid is preferably at least 30 percent by weight, in particular at least 40 percent by weight, preferably at least 50 percent by weight.
  • the liquid is preferably a solution, in particular an aqueous solution, or a suspension, in particular an aqueous suspension.
  • the liquid preferably contains at least one dye.
  • the dye is preferably selected in such a way that a flame retardant content, in particular spatially resolved, can be determined from the color of a cross section of the wood-based panel.
  • the dye is a fluorescent dye, so that the content of flame retardants can be deduced from the flame retardant content by irradiating the cross section of the wood-based panel with excitation light and by spatially resolved measurement of an intensity of the resulting fluorescent radiation. This allows a particularly simple quality control.
  • the liquid temperature of the liquid when applied to the side surface is preferably at least 40°C, in particular at least 50°C, particularly preferably at least 60°C.
  • the solubility of flame retardants generally increases at high temperatures. A higher temperature therefore means that less liquid is required to apply a given amount of flame retardant. It is favorable if the temperature is less than 100°C, in particular less than 90°C.
  • a surface temperature of the first side surface when the liquid is applied is at least 30°C, in particular at least 40°C.
  • the surface temperature is preferably at most 65°C, in particular at most 50°C. It is favorable if the surface temperature is at most 20° C., in particular 10° C., lower than the liquid temperature.
  • the surface temperature is at least as great as the liquid temperature. In this case, the flame retardant does not precipitate out of the liquid and the flame retardant can be sucked into the edge zone.
  • a surface-specific application quantity of liquid is preferably at least 0.3 kg/square meter and/or at most 5 kg/square meter.
  • the surface-specific application quantity of liquid which is measured, for example, in liters per square meter, is chosen such that the moisture content of a surface layer of a surface layer of the wood-based panel deviates by no more than 30% from the core moisture content after the liquid has been sucked into the edge zone.
  • the raw wood-based panel loses water in the edge zone through evaporation. This results in a moisture gradient in the raw wood-based panel, which is undesirable.
  • the liquid containing the flame retardant the loss of moisture in the edge zone can be at least partially compensated for again. Any post-treatment that might otherwise be necessary, for example in a climatic chamber, can thus generally be omitted.
  • the negative pressure is preferably at least 100 hPa, in particular at least 150 hPa, preferably at least 200 hPa, particularly preferably at least 300 hPa. This means that the pressure deviates by at least 300 hPa from the ambient pressure. It is favorable if the negative pressure is at least 400 hPa. For example, the pressure is at least 50 hPa and/or at most 700 hPa.
  • the method comprises the steps: (a) after the liquid has been sucked into the edge zone of the first side surface, rotating the raw wood-based material board, (b) applying the liquid to the second side surface and (c) applying a vacuum to the first Side surface, so that the liquid is sucked into the edge zone of the second side surface of the raw wood-based panel, so that the wood-based panel is formed.
  • the treatment with the solution containing the flame retardant is carried out on both sides.
  • the method includes the steps (a) scattering of a first cover layer of chipboard, (b) scattering of at least one middle layer of chipboard arranged thereon, (c) scattering of a second cover layer of chipboard arranged on the middle chipboard layer, and (d ) Pressing the layers to form the raw wood-based panel, which has a first top layer, which has been created from the first top chipboard layer, a middle layer, formed from the middle layer of chipboard and a second top layer formed from the second top layer of chipboard.
  • the method preferably comprises step (d1) applying the liquid containing the flame retardant with an area-specific application quantity of liquid which corresponds to at least 10 percent by weight of an area-specific mass of the first cover layer.
  • the method preferably comprises step (d2) applying the flame retardant-containing liquid with an area-specific application amount of flame retardant that corresponds to at least 10 percent by weight of the area-specific mass of the top layer. It has been found that a flame-retardant wood-based material panel can generally be obtained in this way.
  • first cover chip layer and/or the second cover chip layer consists of coarse chips.
  • at least one top chip layer can consist of fine chips.
  • the middle chip layer consists of coarse chips.
  • the first cover chip layer and/or the second cover chip layer do not have to consist of coarse chips, they can also consist of other wood-containing primary products. The same applies to the middle chip layer.
  • the coarse chips do not contain flame retardants or contain flame retardants in a concentration that is so small that the proportion of the flame retardant that is introduced into the wood-based panel via the coarse chips is at most 50 percent by weight, in particular at most 30 percent by weight, preferably at most 10 percent by weight, of the total corresponds to the flame retardant contained in the wood-based panel.
  • an internal concentration of flame retardant in an internal thickness quintile of a thickness extension from the first side surface to the second side surface is at most 0.8 times, in particular at most 0.6 times, particularly preferably at most half, in particular at most 0.4 times, preferably at most 0.3 times and more preferably at most 0.1 times an outside concentration in a first outermost thickness quintile extending to the first side surface.
  • the internal concentration of flame retardant is significantly lower than the concentration of flame retardant in the edge zone that is adjacent to the side surface. It has been found that the flame retardant is particularly effective at this point.
  • a second decile concentration of flame retardant in the second thickness decile of the thickness extension is at least 0.1 times a first decile concentration in the first outermost thickness decile.
  • flame retardants are not only found in the outermost deciles, but flame retardants are also introduced further into the interior of the raw wood-based panel.
  • the wooden board according to the invention is a coarse chipboard, it is preferably a fire-protected building board. In particular, this chipboard is designed to be installed in buildings. If the wood-based panel according to the invention is an HDF panel, it can be used, for example, as floor, wall or ceiling cladding.
  • a wood-based panel according to the invention in the form of an MDF panel is suitable, for example, as a door leaf or as a furniture front.
  • an insulating element for example a facade insulating element, which has at least one layer of a wood-based panel according to the invention.
  • figure 1 shows schematically a wood-based panel manufacturing device 10, which has a press 12 in the form of a continuous belt press for pressing at least one pre-product layer 14, in the present case three pre-product layers 14.i to form a raw wood-based panel 16.
  • the at least one layer of preliminary product 14 is produced by a scattering device 18 .
  • the spreading device 18 comprises a first spreader 20.1 for spreading a first layer of pre-product 14.1 in the form of a first layer of chipboard, a second spreader 20.2 for spreading a second layer of pre-product 14.2 in the form of a middle layer of chipboard, and a third spreader 20.3 for spreading a third Pre-product layer 14.3 in the form of a second covering chip layer.
  • the resulting raw wood-based panel 16 After pressing using the press 12, the resulting raw wood-based panel 16 has a first cover layer 22.1, a middle layer 22.2 and a second cover layer 22.3.
  • the press 12 is heated, for example, by means of a thermal fluid 24, which flows in heating tubes 26.1, 26.2, . . .
  • the heat of the thermal fluid 24 is transferred to a circulating press belt 28, which is pressed onto the pre-product layers 14.i by means of pressure rollers 30.1, 30.2, .
  • a liquid application device 32 is arranged downstream of the press 12 in a material flow direction M, by means of which a liquid 34 containing a flame retardant can be applied to a first side surface S1 of the raw wood-based panel 16 .
  • a suction device 36 is arranged behind the press 12 in the direction of material flow M, by means of which the liquid 34 that was applied to the first side surface S1 is sucked into the raw wood-based material board 16 .
  • the liquid application device 32 comprises a liquid reservoir 38 and a pump 40, by means of which the liquid 34 is conducted to at least one nozzle 41 under a liquid pressure p 34 .
  • the nozzle 41 generates a spray mist 42 which settles on the first side surface S1.
  • the nozzle 41 can be part of a nozzle bar 43 that has three or more nozzles.
  • the liquid application device 32 can have a temperature control device 43 which keeps the liquid 34 at a predetermined temperature T 34 .
  • FIG 2 shows an enlarged view of the suction device 36, which has a vacuum table 37, which has a circumferential seal 44, by means of which the second side surface S2 is sealed off from a suction chamber 46.
  • the suction chamber 46 is connected to a vacuum pump 52 by means of a vacuum line 49 .
  • the liquid 34 is drawn into a first edge zone 50.1 of the raw wood-based panel.
  • the suction space is aerated, the raw wood-based panel 16 is turned, the pressure p 46 is applied again to the suction space, and liquid 34 is applied to the second side surface.
  • the suction chamber is ventilated again.
  • the liquid application device 32 can have, for example, an application roller 52 or another device for applying the liquid 34 to the first side surface S1.
  • Figure 3a shows schematically a cross section through a wood-based panel 54 according to the invention, which has a first edge surface K1 and a second edge surface K2.
  • Figure 3b shows the course of the concentration c F,54 of flame retardant in the wood-based panel 54 as a function of the distance z from the respective nearest side surface. It can be seen that the concentration is greatest at the surface. As the distance z from the first side surface S1 of the wood-based panel 54 increases, the concentration decreases up to the middle of the wood-based panel 54 .
  • the wood-based panel 54 has an inner concentration c F,Q3 of flame retardant.
  • the wood-based panel 54 has a first external concentration c F,Q1 of flame retardant.
  • the wood-based panel 54 has a second external concentration c F,Q5 .
  • Figure 3c shows a division into deciles. It can be seen that a second decile concentration c F,D2 of flame retardant in the second thickness decile of the thickness extension, which is in the direction of a middle of the thickness extension next to the first, outermost thickness decile, at least 0.1 times one first decile concentration c F,D1 in the first extreme decile of thickness.
  • PMDI polymeric diphenylmethane diisocyanate
  • raw wood material panel 16 was rotated and the process repeated. Thereafter, raw wood-based panel 16 (base area: DIN A4, sample 1) was made from the panel and this was tested with a conventionally produced flame-retardant OSB panel.
  • the conventionally produced flame-retardant OSB board had a comparable amount of the flame retardant mentioned above in the top layer and had been air-conditioned before the test (humidity: approx. 9%).
  • the samples were flamed for different lengths of time using a gas burner positioned at a defined distance from the surface. After the flaming time had elapsed, it was noted whether burning/continued burning could be observed and the duration of the continued burning was determined.
  • the liquid used corresponds to an amount of 15% by weight based on the top layer strands (thickness of the top layer approx. 3 mm per side).
  • the conventionally produced OSB board had a comparable amount of the flame retardant mentioned above in the top layer and had been air-conditioned before the test (humidity: approx. 9%).
  • the wood-based panels produced using the process according to the invention behave just as well as the reference panel. Even after 15 minutes of flaming, none of the samples continued to burn after the burner was switched off. At the subsequent Investigation showed that the wood-based panels produced according to the invention still had a significantly higher strength after the test. In the case of the reference board, individual charred strands could easily be detached mechanically from the structure, which was only possible with greater expenditure of force in the case of the two wood-based material boards produced according to the invention.
  • the binder content was also increased in this panel (2% more than in the standard).
  • an amount of flame retardant was introduced into the wood-based panel, which is 15 percent by weight based on the top layer (thickness of the top layer about 1.2 mm per side).
  • the raw wood material panel 16 was rotated and the process repeated.
  • the wood-based panel produced conventionally had a comparable amount of the flame retardant mentioned above in the panel and had been air-conditioned before the test (humidity: approx. 9%).
  • the samples When tested for flammability, the samples were tested just like a conventionally manufactured MDF board.
  • the MDF board produced according to the invention has met or exceeded the results in terms of flammability and strength compared to the conventionally produced MDF board.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
EP21203262.7A 2021-10-18 2021-10-18 Procédé de fabrication d'une plaque en matériau dérivé du bois et dispositif de fabrication de plaques en matériau dérivé du bois Pending EP4166294A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21203262.7A EP4166294A1 (fr) 2021-10-18 2021-10-18 Procédé de fabrication d'une plaque en matériau dérivé du bois et dispositif de fabrication de plaques en matériau dérivé du bois
PCT/EP2022/078655 WO2023066802A1 (fr) 2021-10-18 2022-10-14 Procédé de fabrication d'un panneau en matériau dérivé du bois et dispositif de fabrication de panneaux en matériau dérivé du bois

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21203262.7A EP4166294A1 (fr) 2021-10-18 2021-10-18 Procédé de fabrication d'une plaque en matériau dérivé du bois et dispositif de fabrication de plaques en matériau dérivé du bois

Publications (1)

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EP4166294A1 true EP4166294A1 (fr) 2023-04-19

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EP21203262.7A Pending EP4166294A1 (fr) 2021-10-18 2021-10-18 Procédé de fabrication d'une plaque en matériau dérivé du bois et dispositif de fabrication de plaques en matériau dérivé du bois

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EP (1) EP4166294A1 (fr)
WO (1) WO2023066802A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2168738A1 (fr) * 2008-09-26 2010-03-31 Flooring Technologies Ltd. Procédé de fabrication d'une plaque en fibres de bois et dispositif de fabrication de plaques en fibres de bois
EP3127670A2 (fr) * 2012-01-31 2017-02-08 Flooring Technologies Ltd. Procédé d'imprégnation de plaques de matière première
EP3388213A2 (fr) * 2017-02-24 2018-10-17 Cefla Deutschland GmbH Procédé de fabrication d'un panneau de fibres difficilement inflammable et/ou consolidé
CN112440347A (zh) * 2020-11-25 2021-03-05 山东宜居新材料科技有限公司 一种纳镁板加工工艺及阻燃浸渍装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019214793A1 (fr) * 2018-05-11 2019-11-14 Burnblock Holding Aps Composition ignifuge et de durcisseur latent, procédé de fabrication de composites à base de bois et de fibres de cellulose ignifugés et panneaux et panneaux à base de bois et de fibres de cellulose ignifugées

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2168738A1 (fr) * 2008-09-26 2010-03-31 Flooring Technologies Ltd. Procédé de fabrication d'une plaque en fibres de bois et dispositif de fabrication de plaques en fibres de bois
EP3127670A2 (fr) * 2012-01-31 2017-02-08 Flooring Technologies Ltd. Procédé d'imprégnation de plaques de matière première
EP3388213A2 (fr) * 2017-02-24 2018-10-17 Cefla Deutschland GmbH Procédé de fabrication d'un panneau de fibres difficilement inflammable et/ou consolidé
CN112440347A (zh) * 2020-11-25 2021-03-05 山东宜居新材料科技有限公司 一种纳镁板加工工艺及阻燃浸渍装置

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