EP3170635B1 - Plaque en matériau dérivé du bois osb (panneau de lamelles orientées) présentant des caractéristiques améliorées et son procédé de fabrication - Google Patents

Plaque en matériau dérivé du bois osb (panneau de lamelles orientées) présentant des caractéristiques améliorées et son procédé de fabrication Download PDF

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Publication number
EP3170635B1
EP3170635B1 EP15195141.5A EP15195141A EP3170635B1 EP 3170635 B1 EP3170635 B1 EP 3170635B1 EP 15195141 A EP15195141 A EP 15195141A EP 3170635 B1 EP3170635 B1 EP 3170635B1
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EP
European Patent Office
Prior art keywords
wood
strands
osb
torrefied
wood strands
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.)
Active
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EP15195141.5A
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German (de)
English (en)
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EP3170635A1 (fr
Inventor
Norbert Dr. Kalwa
Ingo Lehnhoff
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Swiss Krono Tec AG
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Swiss Krono Tec AG
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Publication date
Priority to HUE15195141A priority Critical patent/HUE036992T2/hu
Application filed by Swiss Krono Tec AG filed Critical Swiss Krono Tec AG
Priority to PT151951415T priority patent/PT3170635T/pt
Priority to ES15195141.5T priority patent/ES2660426T3/es
Priority to PL15195141T priority patent/PL3170635T3/pl
Priority to EP15195141.5A priority patent/EP3170635B1/fr
Priority to EP16794248.1A priority patent/EP3377283B1/fr
Priority to HUE16794248A priority patent/HUE050465T2/hu
Priority to CA3005487A priority patent/CA3005487C/fr
Priority to CN201910288929.1A priority patent/CN110142831B/zh
Priority to RU2018121541A priority patent/RU2684738C1/ru
Priority to ES16794248T priority patent/ES2812200T3/es
Priority to PT167942481T priority patent/PT3377283T/pt
Priority to BR112018009286A priority patent/BR112018009286A8/pt
Priority to US15/773,328 priority patent/US10730202B2/en
Priority to UAA201806272A priority patent/UA124056C2/uk
Priority to CN201680067067.4A priority patent/CN108290311B/zh
Priority to PL16794248T priority patent/PL3377283T3/pl
Priority to JP2018525776A priority patent/JP6518385B2/ja
Priority to PCT/EP2016/076565 priority patent/WO2017084884A1/fr
Publication of EP3170635A1 publication Critical patent/EP3170635A1/fr
Application granted granted Critical
Publication of EP3170635B1 publication Critical patent/EP3170635B1/fr
Priority to RU2019108980A priority patent/RU2766676C2/ru
Priority to JP2019080211A priority patent/JP6752926B2/ja
Active legal-status Critical Current
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    • 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
    • B27K5/0085—Thermal treatments, i.e. involving chemical modification of wood at temperatures well over 100°C
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
    • 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
    • B27N1/00—Pretreatment of moulding material
    • 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
    • B27N1/00—Pretreatment of moulding material
    • B27N1/003—Pretreatment of moulding material for reducing formaldehyde gas emission
    • 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
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/10—Moulding of mats
    • B27N3/12—Moulding of mats from fibres
    • 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
    • B27K1/00—Damping wood
    • 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
    • B27K2200/00—Wooden materials to be treated
    • B27K2200/15—Pretreated particles or fibres
    • 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
    • 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
    • B27K2240/60—Improving the heat-storage capacity
    • 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
    • B27K2240/70—Hydrophobation treatment
    • 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
    • B27K5/001—Heating

Definitions

  • the present invention relates to a process for the production of OSB wood-based panels according to the preamble of claim 1, OSB wood-based panels produced by the method according to claim 11 and the use of torrefected wooden strands according to claim 15.
  • Coated boards also known as OSB (Oriented Strand Boards) are wood-based panels made from long strands.
  • OSB Oriented Strand Boards
  • the OSB boards originally obtained as waste products of the veneer and plywood industry are increasingly being used in wood and prefabricated house construction, since OSB boards are lightweight and nevertheless fulfill the structural requirements set on construction boards.
  • OSB boards are used as building boards and as wall or roof planking or in the floor area.
  • the production of OSB boards is carried out in a multi-stage process, wherein initially the chips or strands of debarked roundwood, preferably coniferous wood, are peeled off in the longitudinal direction by rotating blades. In the subsequent drying process, the natural moisture of the beach is reduced at high temperatures.
  • the degree of moisture of the strands may vary depending on the adhesive used, and the humidity should be well below 10% in order to avoid breakers during later compression. Depending on the adhesive, wetting may be more favorable on rather wet beaches or on dry beaches.
  • as little moisture as possible should be present in the strands during the pressing process, in order to reduce the vapor pressure generated during the pressing process as far as possible, as this could otherwise cause the raw plate to burst.
  • gluing device in which the glue or adhesive is applied finely distributed to the chips.
  • PMDI polymeric diphenylmethane diisocyanate
  • MUPF glues melamine-urea-phenol-formaldehyde
  • the glues can also be mixed in the OSB boards. These glues are used because the OSB boards are often used for structural applications as mentioned above. There must be used moist or moisture-resistant glues.
  • the glued strands are scattered in scattering apparatuses alternately along and across the production direction, so that the strands are arranged crosswise in at least three layers (lower cover layer - middle layer - upper cover layer).
  • the scattering direction of the lower and upper cover layer is the same, but deviate from the scattering direction of the middle layer.
  • the strands used in the top and middle layers differ from each other.
  • the strands used in the outer layers are flat and the strands used in the middle layer are less flat up to span-shaped.
  • two strands of material are used in the manufacture of the OSB boards: one with flat strands for the later cover layers and one with "chips" for the middle layer. Accordingly, the strands in the middle layer may be qualitatively inferior because the flexural strength is generated substantially by the cover layers. Therefore, fines produced during machining can also be used in the middle layer of OSB boards.
  • OSB boards are enjoying increasing popularity and diverse applications, for example as a construction element in house construction or as formwork in concrete construction.
  • the inherent hygroscopic properties of wood-based materials have a detrimental effect in some applications.
  • Volatile organic compounds also called VOCs, include volatile organic compounds that readily evaporate or are already present as gas at lower temperatures, such as room temperature.
  • the volatile organic compounds VOC are either already present in the wood material and are released during workup from this or they are formed according to the current state of knowledge by the degradation of unsaturated fatty acids, which in turn are decomposition products of wood.
  • Typical conversion products that occur during processing for example, pentanal and hexanal, but also octanal, octenal or 1-heptenal.
  • softwoods from which OSB boards are predominantly produced contain large amounts of resin and fats which lead to the formation of volatile organic terpene compounds and aldehydes.
  • VOCs and aldehydes, such as formaldehyde can also be formed or released when certain adhesives are used for the production of wood-based materials.
  • OSB boards are critical mainly because this material is predominantly used uncoated. This allows the ingredients to exude unhindered.
  • OSB boards are often used for cladding / paneling of large areas, which usually results in a high space loading (m 2 OSB / m 3 room air). This leads in addition to a concentration of certain substances in the room air.
  • OSB boards Another problem in the production of OSB boards is the swelling tendency of the wood strands, which can lead to a reduction in the technological values such as strength values of the OSB wood-based boards.
  • One approach to reducing swelling is in eg US 6098679 described.
  • a method and apparatus is shown for pre-treating or post-treating OSB panels to reduce swelling.
  • the OSB plate is charged with superheated steam in a vacuum chamber.
  • the invention is now based on the technical object to improve the known per se method for the production of OSB material boards to produce OSB material plates with a significantly reduced emission of volatile organic compounds (VOCs) and with improved swelling values simply and safely. If possible, the manufacturing process should be changed as little as possible and the cost do not rise disproportionately. Furthermore, the solution should include the greatest possible flexibility. Finally, environmental aspects should also be considered, ie the solution should not cause additional energy consumption or generate additional waste.
  • the present method enables the production of OSB wood-based panels using torrefied wooden strands which are introduced into a known manufacturing process in addition to or as an alternative to untreated wood strands.
  • An OSB wood-based panel produced by the method according to the invention comprising torrefied wood has a reduced emission of volatile organic compounds, in particular of terpenes, organic acids such as acetic acid and aldehydes.
  • OSB wood-based panels By providing the present method, there are several advantages.
  • a simple production of OSB wood-based panels is possible without substantially influencing the usual process chain without the classical drying process with significantly reduced emission of volatile organic compounds from the OSB.
  • the produced OSB wood-based panels also have a significantly lower swelling and higher dimensional stability.
  • simple products are produced, which are produced by the addition of aqueous formulations, with an adjustment of the water balance is possible.
  • Torrefaction is a thermochemical treatment process in which the material to be torrefied is heated in an oxygen-reduced or oxygen-free gas atmosphere at atmospheric pressure. Due to the lack of oxygen, the material does not burn, instead there is a mass loss due to the decomposition of wood components, which are degraded to volatile compounds at Torrefiz istsstemperaturen. These are mainly hemicelluloses and lignins. In addition, low molecular weight compounds such as formic acid, terpenes, hydrocarbons, etc. driven out. Torrefied material is hydrophobic and therefore less susceptible to ambient humidity, so that the risk of rotting torrefected material is extremely low.
  • the tanning step of the wood strands may be provided in various ways in the present process.
  • At least a portion of the wood strands used to make the OSB boards are dried prior to torrefying, i. in this case dried or pre-dried wood strands, e.g. subjected to a degree of moisture of 5 to 15% moisture, preferably 5 to 10% moisture of Torrefizierung.
  • At least a portion of the wood strands are torrefied with a humidity of 20-50% by weight, i.
  • a humidity of 20-50% by weight i.
  • the present method enables torrefaction of wet or dry wood strands.
  • the torrefaction of wet wood strands is advantageous because the drying step is saved.
  • torrefined wood strands or a mixture of torrefied wood strands and untreated (ie non-torrefied) wood strands are used as the middle layer and / or top layer of the OSB material board.
  • the torrequel faced wood strands are used only in the middle layer, only in one or both cover layers or in all layers.
  • the use of a dryer is eliminated.
  • torrefied wood strands In another variant it is possible to form only the middle layer of torrefied wood strands and to use dried and non-tinted wood strands for one or both cover layers. Since torrefected strands have a brown color, it may be advantageous to use torrefied strands only in the middle layer.
  • only one or both cover layers are formed of torrefied wood strands, and for the middle layer, dried and untorn wood strands are used.
  • the middle and outer layers in each case a mixture with any ratio of torrefiz faced wooden strands and non-torrefected wooden strands.
  • the mixture may comprise between 10 and 50% by weight, preferably between 20 and 30% by weight of untreated or non-torrefied wood strands and between 50 and 90% by weight, preferably between 70 and 80% by weight of torrefied wood strands.
  • the step of Torrefizierens the wood strands can be performed separately from the manufacturing process of OSB wood-based panels.
  • the torrefaction step occurs outside the overall process or process line.
  • the wood strands are thereby discharged from the manufacturing process and introduced into the torrefying apparatus (e.g., torrefying reactor).
  • the Torrefiz convinced wood strands may, after an intermediate storage, for example. be returned to the conventional manufacturing process immediately before gluing. This allows a high flexibility in the manufacturing process.
  • the Torrefizianss intimid the wood strands can be integrated in yet another embodiment variant in the manufacturing process of the OSB wood-based panels, ie the Torrefiz michianss Republic is incorporated into the overall process or process line and takes place online.
  • the torrefaction can be carried out immediately after the cutting and provision of the wooden strands, or only after the sifting and separation of the wooden strands according to the use of the wooden strands for the middle or top layer. In the latter case, a separate torrefaction of the wooden strands can be made according to the torrefaction requirements for the wooden strands used in the middle and top layers.
  • the wood strands used herein may have a length of between 50 to 200 mm, preferably 70 to 180 mm, particularly preferably 90 to 150 mm; a width between 5 to 50 mm, preferably 10 to 30 mm, particularly preferably 15 to 20 mm; and a thickness between 0.1 and 2 mm, preferably between 0, 3 and 1.5 mm, particularly preferably between 0, 4 and 1 mm.
  • the wood strands for example, have a length between 150 and 200 mm, a width between 15 and 20 mm, a thickness between 0.5 and 1 mm and a moisture content of max. 50% up.
  • the torrefaction of the wood strands is carried out in at least one Torrefiz réellesreaktor, preferably in two Torrefiz réellesreaktoren.
  • the Torrefiz réellesreaktor used here can be present as a batch system or as a continuously operated system or work.
  • the torrefaction of wood strands used for the middle layer and topsheets of the OSB wood-based panel may each be performed separately in at least two torrefying reactors.
  • the two Torrefizianssreaktoren used are preferably connected in parallel or arranged in this case.
  • the wood strands are torrefied by heating in an oxygen-poor or oxygen-free atmosphere under atmospheric pressure at a temperature between 150 ° C and 300 ° C, preferably between 200 ° C and 280 ° C, particularly preferably between 220 ° C and 260 ° C. It can be torrefied under atmospheric pressure in the presence of an inert gas, preferably nitrogen as the reaction gas or gas stream. It is also possible to use saturated steam, in which case the Torrefiz michellessrea runs at temperatures between 160 ° C and 200 ° C and pressures of 6 bar to 16 bar.
  • Torrefizierens is preferably terminated at a loss of mass of the wood strands of 10 to 30%, preferably 15 to 20%.
  • the duration of the process varies depending on the amount and type of the starting material used and can be between 1 and 5 h, preferably between 2 and 3 h.
  • the pyrolysis gases released during the torrefaction process essentially from hemicelluloses and other low molecular weight compounds, are used to generate process energy.
  • the amount of gas mixture formed as gaseous fuel is sufficient to operate the process energetically self-sufficient.
  • the torrefied wooden strands are cooled in water before gluing with a suitable binder.
  • the torrefected wooden strands can be cooled in a water bath, which ensures complete wetting with water.
  • a wetting agent which facilitates the wetting of the hydrophobic strands can be added to the water.
  • the contacting of the wood strands with the at least one binder in step c) is preferably carried out by spraying or atomizing the binder onto the wood strands.
  • Many OSB systems work with rotating coils (drums with atomizer gluing). A mixer gluing would also be possible.
  • the strands are intimately mixed with the glue in a mixer by rotating blades.
  • a polymer adhesive is preferably used as a binder which is selected from the group consisting of formaldehyde adhesives, polyurethane adhesives, epoxy adhesives, polyester adhesives.
  • formaldehyde condensate adhesive in particular, a phenol-formaldehyde resin adhesive (PF), a cresol / resorcinol-formaldehyde resin adhesive, urea-formaldehyde resin adhesive (UF) and / or melamine-formaldehyde resin adhesive (MF) can be used.
  • polyurethane adhesive based on aromatic polyisocyanates, in particular Polydiphenylmethane diisocyanate (PMDI), tolylene diisocyanate (TDI) and / or diphenylmethane diisocyanate (MDI) is present, with PMDI being particularly preferred.
  • PMDI Polydiphenylmethane diisocyanate
  • TDI tolylene diisocyanate
  • MDI diphenylmethane diisocyanate
  • the torrefied and non-torrefied wood strands having a binder amount of 1.0 to 5.0% by weight, preferably 2 to 4% by weight, especially 3% by weight (based on the total amount of wood strands) glued.
  • the first polymer adhesive at least one polycondensation adhesive such as a polyamide, a polyester, a silicone and / or a formaldehyde condensate adhesive, in particular a phenol-formaldehyde resin adhesive (PF), a cresol / resorcinol formaldehyde resin adhesive , Urea-formaldehyde-resin adhesive (UF) and / or melamine-formaldehyde-resin adhesive (MF) are used, and as the second polymer adhesive at least one polyaddition adhesive such as an epoxy resin, polycyanurate and / or a polyurethane adhesive, in particular a polyurethane adhesive based on polydiphenylmethane diisocyanate (PMDI) can be used.
  • PF phenol-formaldehyde resin adhesive
  • UF cresol / resorcinol formaldehyde resin adhesive
  • UF Urea-formaldehyde-resin adhesive
  • binder variants are particularly preferred: phenol-formaldehyde adhesive (PF); Melamine-urea-formaldehyde-resin adhesive (MUF); Melamine-urea-phenol formaldehyde resin adhesive (MUPF); PMDI adhesives and a combination of MUF / MUPF and PMDI adhesives.
  • PF phenol-formaldehyde adhesive
  • MUF Melamine-urea-formaldehyde-resin adhesive
  • MUPF Melamine-urea-phenol formaldehyde resin adhesive
  • PMDI adhesives and a combination of MUF / MUPF and PMDI adhesives.
  • preference is given to using PMDI for the middle layer and as binder in the outer layers MUF or MUPF.
  • PMDI adhesives for all layers, i. for the cover layers and the middle layer.
  • the flame retardant may typically be added in an amount between 1 and 20% by weight, preferably between 5 and 15% by weight, particularly preferably ⁇ 10% by weight, based on the total amount of wood strands.
  • Typical flame retardants are selected from the group comprising phosphates, borates, in particular ammonium polyphosphate, tris (tri-bromneopentyl) phosphate, zinc borate or boric acid complexes of polyhydric alcohols.
  • the glued (torrefied and / or non-torrefied) wood strands are scattered onto a conveyor belt to form a first cover layer along the transport direction, then to form a middle layer transversely to the transport direction and finally to form a second cover layer along the transport direction.
  • the glued wooden strands are pressed at temperatures between 200 and 250 ° C., preferably 220 and 230 ° C., to form an OSB wood-based panel.
  • the present method enables the production of an OSB wood-based panel with reduced emission of volatile organic compounds (VOCs) comprising torrefied wood strands.
  • VOCs volatile organic compounds
  • the OSB wood-based panel produced by the present method has in particular a reduced emission of aldehydes released during wood pulping, in particular pentanal or hexanal, organic acids such as acetic acid and / or terpenes, in particular carene and pinene.
  • aldehydes released during wood pulping in particular pentanal or hexanal
  • organic acids such as acetic acid and / or terpenes, in particular carene and pinene.
  • the present OSB wood-based panel may consist entirely of torrefied wooden strands or of a mixture of torrefied and non-torrefied wooden strands.
  • the present OSB board has a reduced swelling value, in particular one of 20% to 50%, preferably 30% to 40%, compared to OSB boards made entirely of non-torrefied wood strips. reduced source value by 35%.
  • the swelling tendency of the present OSB wood-based panel is between 5 and 30%, preferably between 10 and 25%, particularly preferably between 15 and 20% (after 24 hours of water storage).
  • the present OSB wood-based panel may have a bulk density between 300 and 1000 kg / m 3 , preferably between 500 and 800 kg / m 3 , particularly preferably between 500 and 600 kg / m 3 .
  • the thickness of the present OSB wood-based panel may be between 5 and 50 mm, preferably between 10 and 40 mm, wherein in particular a thickness between 15 and 25 mm is preferred.
  • the object of the present invention is also achieved with the use of torrefied wood strands to reduce the emission of volatile organic compounds (VOCs) from OSB wood-based panels.
  • VOCs volatile organic compounds
  • the torrefected wood strands are used for reducing aldehydes, organic acids and / or terpenes released during the wood pulping, in particular the cutting of the woods in strands.
  • the torrefied wood strands are preferably used for reducing the emission of organic acids, in particular for reducing the emission of acetic acid from OSB wood-based panels.
  • Organic acids are produced in particular as cleavage products of the wood constituents cellulose, hemicelluloses and lignin, alkanoic acids such as acetic acid and propionic acid or aromatic acids preferably being formed.
  • aldehydes can be formed from the basic building blocks of cellulose or hemicellulose.
  • aldehyde furfural is formed from mono- and disaccharides of cellulose or hemicellulose, while aromatic aldehydes can be liberated during the partial hydrolytic exclusion of lignin.
  • the Torrequel being strands to reduce the emission of C1-C10 aldehydes, particularly preferably from formaldehyde, acetaldehyde, pentanal, hexanal or furfural used in OSB wood-based panels.
  • the torrefied wooden strands are used to reduce the emission of terpenes.
  • the torrefied wood strands can be used to reduce liberated terpenes, in particular C10 monoterpenes and C15 sesquiterpenes, particularly preferably acyclic or cyclic monoterpenes.
  • Typical acyclic terpenes are terpene hydrocarbons such as myrcene, terpene alcohols such as gerianol, linaool, ipsinol and terpene aldehydes such as citral.
  • Typical representatives of the monocyclic terpenes are p-menthane, terpeninol, limonene or carvone, and typical representatives of the bicyclic terpenes are caran, pinane, bornan, in particular 3-carene and ⁇ -pinene being of importance.
  • Terpenes are components of the tree resins and therefore especially in very resinous tree species such as pine or spruce.
  • first embodiment of the method according to the invention describes the individual process steps, starting with the provision of the wood output product to the finished OSB wood-based panel.
  • step 1 suitable wood starting material for the production of the wood strands is first provided.
  • wood source material all conifers, hardwoods or mixtures thereof are suitable.
  • the debarking (step 2) and the cutting (step 3) of the wood starting material takes place in suitable chippers, wherein the size of the wood strands can be controlled accordingly. After comminution and provision of the wood strands, they are optionally subjected to a predrying process, with a moisture content of 5-10% being set with respect to the initial moisture content of the woodchips (not shown).
  • the wooden strands are introduced into a torrefying reactor (step 4).
  • the torrefaction of the wooden strands takes place in a temperature range between 220 ° and 260 ° C.
  • the resulting pyrolysis gases or Torrgase be used to generate the necessary energy for the process plant.
  • the torrefected wooden strands are watered, sighted and separated (step 5).
  • step 6a There is a separation in wooden strands for use as a middle layer (step 6a) or as a cover layer (step 6b) with respective gluing.
  • the glued Torrefiz fortunate wood strands are scattered onto a conveyor belt in the order first lower cover layer, middle layer and second upper cover layer (step 7) and then pressed to form an OSB wood-based panel (step 8).
  • the wood starting material is analogous to FIG. 1 initially provided (step 1), debarked (step 2) and machined (step 3).
  • the strands of wood may be subjected to a predrying process, with a humidity of 5-10% being adjusted in relation to the initial moisture content of the strands of wood (step 3a).
  • a separation in wood strands is already carried out after the optional drying for use as a middle layer or as a cover layer (step 5).
  • the torrefaction of the wooden strands takes place in a temperature range between 220 ° and 260 ° C. Torrefaction can be set to the desired torrefaction level for the center and top layers.
  • the resulting pyrolysis gases or Torrgase be used to generate the necessary energy for the process plant.
  • the glued Torrefiz fortunate wood strands are scattered onto a conveyor belt in the order first lower cover layer, middle layer and second upper cover layer (step 7) and then pressed to form an OSB wood-based panel (step 8).
  • the obtained OSB wood-based panel is assembled in each case in a suitable manner.
  • Strands are produced from pine logs and torrefied in a continuous torrefaction apparatus at 180 ° C to a mass loss of about 20%. This takes place under saturated steam. In the process, the beaches turn from light yellow to light brown. The beaches are then cooled in water.
  • the binder (PMDI, about 3% by weight) in a gluing machine (Beleimtrommel, for example, the Fa. Coil) finely distributed on the torrefiz faced wooden strands applied.
  • the glued torrefied stands are sprinkled in an OSB plant as a middle layer.
  • the cover layer is formed from strands which have been dried in a tumble dryer. These have also been glued with PMDI as a glue (about 3% by weight). The beaches are not z. As a paraffin emulsion additionally hydrophobic, so as not to interfere with the subsequently performed tests by the hydrophobing agent. The scattered strands are pressed in a Contipresse to OSB plates.
  • the percentage distribution between middle and top layer is at least 70% to 30%.
  • the strands are pressed into slabs with a density of about 570 kg / m 3 .
  • test plate After a storage time of about one week, the test plate was tested together with a standard plate in the same strength in a micro-chamber on the VOC delivery.
  • Chamber parameters temperature 23 ° C; Humidity 0%; Air flow 150 ml / min; Air exchange 188 / h; Load 48.8 m 2 / m 3 ; Sample surface 0.003 m 2 , chamber volume: 48 ml
  • Table 1 parameter Test plate ⁇ g / m 2 xh Standard plate ⁇ g / m 2 xh hexanal 1093 3164 3-Carene 388 1962 ⁇ -Pinene 322 1174 pentanal 78 354 ⁇ -pinene 98 314
  • the source values are reduced by about 35% through the use of torrefied strands.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Claims (15)

  1. Procédé de fabrication de plaques en matériau dérivé du bois OSB, en particulier de plaques en matériau dérivé du bois OSB avec une émission réduite de composés organiques volatiles (COV), comprenant les étapes de :
    a) fabrication de lamelles de bois en bois appropriés,
    b) torréfaction d'au moins une partie des lamelles de bois par chauffage dans une atmosphère pauvre en oxygène ou sans oxygène sous pression atmosphérique ou pression accrue à une température entre 150 °C et 300 °C ;
    c) collage des lamelles de bois torréfiées et des lamelles de bois non torréfiées avec au moins un liant ;
    d) répartition des lamelles de bois collées sur une bande de transport ; et
    e) pressage des lamelles de bois collées en une plaque en matériau dérivé du bois OSB.
  2. Procédé selon la revendication 1, caractérisé en ce qu'au moins une partie des lamelles de bois est séchée avant la torréfaction.
  3. Procédé selon la revendication 1, caractérisé en ce qu'au moins une partie des lamelles de bois est torréfiée à une humidité de 20 à 50 % en poids.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que des lamelles de bois torréfiées ou un mélange de lamelles de bois torréfiées et de lamelles de bois non torréfiées sont utilisées comme couche médiane et/ou couche de recouvrement de la plaque en matériau dérivé du bois OSB.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que la torréfaction des lamelles de bois est réalisée dans au moins un réacteur de torréfaction, de préférence dans deux réacteurs de torréfaction.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que la torréfaction des lamelles de bois utilisées pour la couche médiane et les couches de recouvrement de la plaque de matériau dérivé du bois OSB est réalisée respectivement séparément dans au moins deux réacteurs de torréfaction.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que les lamelles de bois sont torréfiées par chauffage dans une atmosphère pauvre en oxygène ou sans oxygène sous pression atmosphérique ou pression accrue à une température entre 200 °C et 280 °C, en particulier de préférence entre 220 °C et 260 °C.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que les lamelles de bois torréfiés sont refroidies avant le collage avec un liant approprié dans l'eau.
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce que les lamelles de bois torréfiées et non torréfiées sont collées avec une quantité de liant de 1,0 à 5,0 % en poids, de préférence de 2 à 4 % en poids, en particulier de 3 % en poids (par rapport à la quantité globale des lamelles de bois).
  10. Procédé selon l'une des revendications précédentes, caractérisé en ce que les lamelles de bois collées sont pressées à des températures entre 200 et 250 °C, de préférence 220 et 230 °C en une plaque de matériau dérivé du bois OSB.
  11. Plaque de matériau dérivé du bois OSB avec une émission réduite de composés organiques volatiles (COV) pouvant être fabriquée dans un procédé selon l'une des revendications précédentes comprenant des lamelles de bois torréfiées.
  12. Plaque de matériau dérivé du bois OSB selon la revendication 11, caractérisée par une émission réduite d'aldéhydes, d'acides organiques et/ou de terpènes libérés pendant le défibrage.
  13. Plaque de matériau dérivé du bois OSB selon la revendication 11 ou 12, caractérisée par un taux de rétention d'humidité réduit par rapport à une plaque de matériau dérivé du bois OSB fabriquée complètement en lamelles de bois non torréfiées, en particulier un taux de rétention d'humidité réduit de 20 % à 50 %, de préférence de 30 % à 40 %.
  14. Plaque de matériau dérivé du bois OSB selon l'une des revendications 11 à 13, caractérisée en ce que celle-ci se compose complètement de lamelles de bois torréfiées ou d'un mélange de lamelles de bois torréfiées et non torréfiées.
  15. Utilisation de lamelles de bois torréfiées pour la réduction de l'émission de composés organiques volatiles (COV) des plaques en matériau dérivé du bois OSB.
EP15195141.5A 2015-11-18 2015-11-18 Plaque en matériau dérivé du bois osb (panneau de lamelles orientées) présentant des caractéristiques améliorées et son procédé de fabrication Active EP3170635B1 (fr)

Priority Applications (21)

Application Number Priority Date Filing Date Title
PT151951415T PT3170635T (pt) 2015-11-18 2015-11-18 Painel de derivados de madeira osb (oriented strand board) com propriedades melhoradas e processo para a sua produção
ES15195141.5T ES2660426T3 (es) 2015-11-18 2015-11-18 Tablero de material derivado de la madera OSB (oriented strand board) con propiedades mejoradas y procedimiento para su producción
PL15195141T PL3170635T3 (pl) 2015-11-18 2015-11-18 Płyta drewnopochodna osb (oriented strand board) o ulepszonych właściwościach i sposób jej wytwarzania
EP15195141.5A EP3170635B1 (fr) 2015-11-18 2015-11-18 Plaque en matériau dérivé du bois osb (panneau de lamelles orientées) présentant des caractéristiques améliorées et son procédé de fabrication
HUE15195141A HUE036992T2 (hu) 2015-11-18 2015-11-18 OSB (Oriented Strand Board - irányított forgácselrendezésû lap) faanyag lap javított tulajdonságokkal és eljárás annak elõállítására
PT167942481T PT3377283T (pt) 2015-11-18 2016-11-03 Painel de derivados de madeira osb (oriented strand board) com propriedades melhoradas e processo para a sua produção
CA3005487A CA3005487C (fr) 2015-11-18 2016-11-03 Panneau a copeaux orientes (osb) en materiau derive du bois presentant des proprietes ameliorees et procede de fabrication associe
CN201910288929.1A CN110142831B (zh) 2015-11-18 2016-11-03 具有改进的特性的osb（取向结构刨花板）人造板和用于其制造的方法
RU2018121541A RU2684738C1 (ru) 2015-11-18 2016-11-03 Плита осп (ориентированно-стружечная плита) на основе древесного материала с улучшенными характеристиками и способ ее изготовления
ES16794248T ES2812200T3 (es) 2015-11-18 2016-11-03 Plancha de materia derivada de la madera OSB (oriented strand board) con propiedades mejoradas y procedimiento para su fabricación
EP16794248.1A EP3377283B1 (fr) 2015-11-18 2016-11-03 Plaque en matériau dérivé du bois osb (panneau de lamelles orientées) présentant des caractéristiques améliorées et son procédé de fabrication
HUE16794248A HUE050465T2 (hu) 2015-11-18 2016-11-03 OSB (irányított forgácselrendezésû lap) faanyag lap javított tulajdonságokkal és eljárás annak elõállítására
US15/773,328 US10730202B2 (en) 2015-11-18 2016-11-03 OSB (oriented strand board) wood material panel having improved properties and method for producing same
UAA201806272A UA124056C2 (uk) 2015-11-18 2016-11-03 Спосіб виготовлення плити осп (орієнтовано-стружкової плити) на основі деревного матеріалу з покращеними характеристиками та плита осп
CN201680067067.4A CN108290311B (zh) 2015-11-18 2016-11-03 Osb人造板和其制造方法以及烘焙过的木材刨花的应用
PL16794248T PL3377283T3 (pl) 2015-11-18 2016-11-03 Płyta drewnopochodna osb (oriented strand board) o ulepszonych właściwościach i sposób jej wytwarzania
JP2018525776A JP6518385B2 (ja) 2015-11-18 2016-11-03 改良された特性を有するｏｓｂ（配向性ストランドボード）木質材料パネルおよびその製造方法
PCT/EP2016/076565 WO2017084884A1 (fr) 2015-11-18 2016-11-03 Panneau à copeaux orientés (osb) en matériau dérivé du bois présentant des propriétés améliorées et procédé de fabrication associé
BR112018009286A BR112018009286A8 (pt) 2015-11-18 2016-11-03 placa de material de madeira osb (oriented strand board), com propriedades aperfeiçoadas e processos para produção da mesma
RU2019108980A RU2766676C2 (ru) 2015-11-18 2019-03-27 Плита осп (ориентированно-стружечная плита) на основе древесного материала с улучшенными характеристиками и способ ее изготовления
JP2019080211A JP6752926B2 (ja) 2015-11-18 2019-04-19 改良された特性を有するｏｓｂ（配向性ストランドボード）木質材料パネルおよびその製造方法

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EP15195141.5A EP3170635B1 (fr) 2015-11-18 2015-11-18 Plaque en matériau dérivé du bois osb (panneau de lamelles orientées) présentant des caractéristiques améliorées et son procédé de fabrication

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EP16794248.1A Active EP3377283B1 (fr) 2015-11-18 2016-11-03 Plaque en matériau dérivé du bois osb (panneau de lamelles orientées) présentant des caractéristiques améliorées et son procédé de fabrication

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BR (1) BR112018009286A8 (fr)
CA (1) CA3005487C (fr)
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RU2019108980A (ru) 2019-04-05
US10730202B2 (en) 2020-08-04
JP6518385B2 (ja) 2019-05-22
EP3170635A1 (fr) 2017-05-24
PL3170635T3 (pl) 2018-06-29
BR112018009286A8 (pt) 2019-02-26
WO2017084884A1 (fr) 2017-05-26
PL3377283T3 (pl) 2020-11-16
JP2018538168A (ja) 2018-12-27
BR112018009286A2 (pt) 2018-11-06
RU2766676C2 (ru) 2022-03-15
CA3005487A1 (fr) 2017-05-26
US20180319037A1 (en) 2018-11-08
RU2019108980A3 (fr) 2021-11-18
HUE050465T2 (hu) 2020-12-28
HUE036992T2 (hu) 2018-08-28
PT3377283T (pt) 2020-08-27
EP3377283A1 (fr) 2018-09-26
JP6752926B2 (ja) 2020-09-09
EP3377283B1 (fr) 2020-06-17
PT3170635T (pt) 2018-02-23
RU2684738C1 (ru) 2019-04-12
CA3005487C (fr) 2020-10-27
UA124056C2 (uk) 2021-07-14
CN108290311A (zh) 2018-07-17
CN108290311B (zh) 2019-05-10
ES2812200T3 (es) 2021-03-16

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