EP3725481A1 - Matériau sous forme de plaque et son procédé de fabrication - Google Patents

Matériau sous forme de plaque et son procédé de fabrication Download PDF

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Publication number
EP3725481A1
EP3725481A1 EP19170159.8A EP19170159A EP3725481A1 EP 3725481 A1 EP3725481 A1 EP 3725481A1 EP 19170159 A EP19170159 A EP 19170159A EP 3725481 A1 EP3725481 A1 EP 3725481A1
Authority
EP
European Patent Office
Prior art keywords
fibers
plate
shaped material
material according
binder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19170159.8A
Other languages
German (de)
English (en)
Other versions
EP3725481B1 (fr
EP3725481C0 (fr
Inventor
Roger Braun
Joachim Hasch
Volker Schwind
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
Priority to ES19170159T priority Critical patent/ES3019583T3/es
Application filed by Swiss Krono Tec AG filed Critical Swiss Krono Tec AG
Priority to PL19170159.8T priority patent/PL3725481T3/pl
Priority to EP19170159.8A priority patent/EP3725481B1/fr
Priority to CA3134193A priority patent/CA3134193A1/fr
Priority to CN202080029160.2A priority patent/CN113710441B/zh
Priority to CN202410418823.XA priority patent/CN118181424A/zh
Priority to JP2021559135A priority patent/JP2022530186A/ja
Priority to BR112021020740A priority patent/BR112021020740A2/pt
Priority to CN202080029521.3A priority patent/CN113840701A/zh
Priority to US17/604,532 priority patent/US12441024B2/en
Priority to EP20701536.3A priority patent/EP3938158B1/fr
Priority to AU2020258486A priority patent/AU2020258486A1/en
Priority to US17/604,544 priority patent/US20220306821A1/en
Priority to UAA202105798A priority patent/UA129218C2/uk
Priority to PCT/EP2020/050451 priority patent/WO2020211988A1/fr
Priority to PCT/EP2020/050452 priority patent/WO2020211989A1/fr
Priority to JP2021559130A priority patent/JP2022529410A/ja
Priority to AU2020259631A priority patent/AU2020259631A1/en
Priority to EP20701537.1A priority patent/EP3934871A1/fr
Priority to CA3137235A priority patent/CA3137235A1/fr
Priority to BR112021020749A priority patent/BR112021020749A2/pt
Priority to ES20170128T priority patent/ES2992159T3/es
Priority to PL20170128.1T priority patent/PL3736095T3/pl
Priority to EP20170128.1A priority patent/EP3736095B1/fr
Publication of EP3725481A1 publication Critical patent/EP3725481A1/fr
Application granted granted Critical
Publication of EP3725481B1 publication Critical patent/EP3725481B1/fr
Publication of EP3725481C0 publication Critical patent/EP3725481C0/fr
Priority to US19/330,388 priority patent/US20260001252A1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B27N1/00—Pretreatment of moulding material
    • B27N1/006—Pretreatment of moulding material for increasing resistance to swelling by 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
    • 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
    • B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
    • 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

Definitions

  • the invention relates to a plate-shaped material and a method for its production and the use of the plate-shaped material.
  • Sheet-like materials made of lignocellulosic fibers are used in a variety of ways because their production is inexpensive and technically mature. Typical is z. B. the use of high-density fibreboard (HDF), whereby wood fibers are pressed using binders to form boards, which are then usually coated with synthetic resin-impregnated papers. This coating hardens under the influence of pressure and temperature, so that a firmly bonded laminate is formed.
  • This laminate is divided and the parts are profiled at the edges, e.g. B. to be used as floor covering laid without glue. However, the material is exposed at the profiled edges.
  • HDF high-density fibreboard
  • WPC wood plastic composites
  • plastic an extruded mixture of wood fibers and plastic.
  • a WPC is dimensionally stable under the influence of water or moisture.
  • the production requires the use of extruders which are not suitable for the production of plate-shaped materials of larger dimensions.
  • non-swelling sheet-like materials can be produced that do not contain wood fibers or other wood components contain.
  • SPC Stone Plastic Composites
  • PVC polyvinyl chloride
  • halogens or terephthalates are used here, so that these products are disadvantageous from an environmental point of view.
  • the plate-shaped material according to the invention is low-emission or emission-free; In particular, the emission of formaldehyde can be largely reduced or avoided, so that the requirements of the State of California for formaldehyde emissions CARB 2 can be met.
  • Volatile organic compounds (VOCs) can also be largely or completely avoided.
  • the invention relates to a plate-shaped material, comprising fibers and binding agent, characterized in that the proportion of the binding agent based on the plate-shaped material is more than 50% by weight.
  • Fibers in the context of this invention are solid particles that are elongated, d. i.e. whose diameter is many times smaller than the longest dimension of the particle.
  • the dimensions of the fibers can be selected within a wide range; they are based in particular on the plate thickness and on the requirements for the homogeneity of the plate-shaped material.
  • the diameter of the fibers is from 10 ⁇ m to 5 mm, the length of the fibers from 0.05 mm to 100 mm.
  • the plate-shaped material therefore has a greater proportion of binding agent than of fibers.
  • the proportion of binder can also be expressed in relation to fibers, that is, the proportion of binder is given in relation to the weight of the fibers used.
  • the proportion of fibers is kept up to constant weight dried fibers indicated (absolutely dry fibers: absolutely dry fibers).
  • the proportion of binder in the plate-shaped material is then more than 100% by weight.
  • Organic or inorganic fibers such as carbon fibers or fibers made of mineral or ceramic raw material or glass fibers can be used for the plate-shaped material according to the invention. Natural fibers, e.g. B.
  • lignocellulosic fibers or synthetic fibers such as fibers made of thermoplastic material such as polyethylene or polypropylene, but also made of polycarbonate, polyacrylic, polymethacrylic or polyurethane can be used to produce the material according to the invention.
  • mixtures of fibers in particular mixtures of the aforementioned fibers, can be used to produce the material according to the invention.
  • Mixtures of fibers allow properties of the material according to the invention to be set, e.g. B. the elasticity or the bending properties, the dimensional stability, the strength, but also the manufacturing properties or processability. If lignocellulosic fibers, e.g.
  • fibers from wood, bamboo or annual plants are used, for example, inexpensive, easy-to-use fibers are available.
  • the use of hygroscopic fibers is not excluded, especially if they are at least partially dried before the production or pressing of the material according to the invention.
  • the lignocellulosic fibers mentioned above include in particular all fibers which have been obtained from plants by chemical or physical processes.
  • Typical examples of physically obtained fibers are softwood fibers, hardwood fibers or bamboo fibers, or fibers from other organic raw materials that have been obtained by mechanical defibration.
  • An example of chemically obtained fibers are e.g. B. pulp fibers from wood, annual plants or other raw materials. Wood fibers from mechanical defibration are particularly typically used, with the aim being to minimize the loss of lignin and hemicelluloses as much as possible.
  • Mixtures of fibers can also be used, in particular to set properties of the material (strength properties, weight), but also to use the raw material fiber in a cost-optimized manner.
  • Fibers in the context of this invention are also fiber bundles; Smaller chips are also included, provided that their fibers can still largely be coated with binder.
  • the material according to the invention is plate-shaped, i. h, he usually has two Main surfaces, which are also referred to below as the top and bottom.
  • the thickness of the finished plate-shaped material can be from 1 mm to 500 mm, typically between 3 mm and 80 mm, mostly between 5 mm and 30 mm. A typical application may require a thickness of the plate-shaped material of 4 mm to 10 mm.
  • the material according to the invention can have flat main surfaces, but the top and / or bottom can also be embossed or milled or processed in some other way so that the material has a variable thickness based on the surface of the material.
  • the material preferably has an essentially homogeneous composition over its thickness.
  • the edges can be machined with conventional tools. They can be sawn, cut or milled.
  • the plate-shaped material according to the invention can be used in many ways. He can z. B. used as floor, ceiling and / or wall covering, for the production of interior fittings or furniture, especially for the interior of vehicles such. B. vehicle cabins, but also outdoors, both as a cladding, z. B. as a curtain wall, as well as for structural uses.
  • the plate-shaped material according to the invention can be coated, colored, lacquered or made decorative in another way. In particular, surface coatings such as those used, for. B. are known from the field of wood materials, can be applied to the surface of the material according to the invention.
  • the material according to the invention differs from the WPC described above in that it is not plastic, in particular thermoplastic plastic with fibers, that is formed into a plate-shaped material, but that a binding agent is used that has a cohesive and / or adhesive interaction with the fibers.
  • binders are known, for example, from the production of wood-based materials according to the prior art.
  • the binder used according to the invention preferably comprises melamine.
  • Melamine is the preferred binder because it is found to be non-swelling and non-hygroscopic, and resistant to hydrolysis. Melamine can either be used alone as a binder or in combination with one or more other binders.
  • binders can be used, either the mixture of two or more binders being applied to the fiber at the same time, e.g. B. as MF resin (melamine-formaldehyde resin). Or it a combination of binders is used which are used sequentially, e.g. B. because they cannot be used in a mixture or because a separate application of different binders has an advantageous effect. In combination with the above-mentioned melamine or alternatively, other binders such as. B.
  • binders can also be used in combination. It is preferred if the binder predominantly comprises melamine. It is further preferred if the proportion of melamine in the binder exceeds 20% by weight, in particular 50% by weight.
  • the binder is preferably urea-free, since urea contributes to the hygroscopicity and thus to the swelling of the lignocellulosic fibers or does not prevent this. Thermoplastic binders are advantageously avoided.
  • the plate-shaped material according to the invention is preferably free from halogens (e.g. fluorine, chlorine), but also from terephthalates.
  • the binder forms the predominant part of the plate-shaped material according to the invention.
  • the plate-shaped material based on the fiber content, more than 100 wt .-%, z. B. 101 wt .-% or 102 wt .-% up to 120 wt .-% binder, the material advantageously has more than 150 wt .-% binder, particularly preferably more than 200 wt .-% binder, a maximum of 500 wt .-% binder, based on the fiber content.
  • the density of the material according to the invention is preferably between 1,000 kg / m 3 and 1,800 kg / m 3 , in particular between 1,000 kg / m 3 and 1,600 kg / m 3 , advantageously between 1,000 kg / m 3 and 1,200 kg / m 3 .
  • the material according to the invention shows, due to the high use of binders, compared to z. B. a wood material, z. B. an HDF board, which in terms of quantity predominantly has lignocellulosic fibers, a higher weight, z. B. between 1,000 kg / m 3 and 1,200 kg / m 3 .
  • the material preferably has fillers. Fillers can help to optimize the weight of the plate-shaped material, usually to minimize it. Fillers can alternatively or additionally serve to optimize certain properties of the panels, e.g. B. conductivity, insulating properties or strength properties. Fillers replace fibers in the material according to the invention. Because the material is in the present of water is to have minimal swelling, in particular minimal thickness swelling, non-hygroscopic or non-swelling fillers and fillers which are resistant to hydrolysis are preferred. Such fillers can be mineral particles, but also ceramic, synthetic or particles made of glass. The size of the particles is preferably no greater than one millimeter, preferably between 10 ⁇ m and 800 ⁇ m. Mixtures of different particles can also be used, e.g. B.
  • the material has wet strength agents.
  • Typical wet strength agents are polyamines, polyimines, e.g. B. polyethyleneimine, polyamides, e.g. B. polyacrylamides or polyamidoamine-epichlorohydrin (PAAE), polyalcohols, e.g. B. polyvinyl alcohols or their copolymers.
  • Wet strength agents further contribute to a reduction in the swelling of the plate-shaped material according to the invention. They are used in amounts of up to 5% based on the weight of the plate-shaped material, preferably in an amount of 0.05% by weight to 2% by weight of the plate-shaped material.
  • the plate-shaped material has water repellants, for. B. paraffin or wax, which are typically used in amounts of up to 5 wt .-% based on the weight of the plate-shaped material, usually in amounts of up to 2 wt .-%, often in an amount of 0.1 wt. -% to 1% by weight.
  • water repellants also helps to reduce the tendency of the sheet-like material to swell.
  • the steps of the method correspond to those of a conventional method e.g. B. for producing a wood-based panel. According to the invention, however, a larger amount of binder is used than previously known, so that the weight fraction of the binder is greater than the weight fraction of the fibers.
  • the fibers may be necessary to at least partially dry the binder on the fibers. If the fibers have moisture, as it is, for. B. is common for lignocellulosic fibers, the moisture content should be adjusted before pressing the fiber cake so that a dimensionally stable, non-swelling or shrinking plate is present after pressing.
  • the lignocellulosic fibers are often used with a moisture content of up to 120% by weight or more before the glue is applied.
  • the lignocellulosic fibers can be dried before or after the application of binder.
  • the lignocellulosic fibers have a moisture content of at most 15% by weight, that is to say with a water content of up to 15% by weight based on the total weight of the fibers.
  • the humidity is preferably between 5% and 10%.
  • the binder is usually provided in liquid form. It can be provided in pure form or, as a rule, in solution, either in solvent or in water.
  • the binder is usually applied to the lignocellulosic fibers by spraying, e.g. By a plurality of spray nozzles which produce a spray of the binder and which are arranged around a downward stream of fibers.
  • a typical design for such a drying device is e.g. B. a blowline, which is used in the manufacture of fiberboard.
  • the surface of the fibers is wetted with binder droplets.
  • the fibers wetted with binder are, after they have optionally been dried, shaped into a fiber cake and pressed.
  • the binder hardens, so that a plate-shaped material is created. When hardening, which takes place under the influence of pressure and temperature, unlike WPC products, irreversible chemical bonds are built up between fibers and binder, but also within the binder.
  • the pressing conditions are essentially the same as those of known wood-based materials with a lower proportion of binding agent compared to the invention.
  • Pressure and temperature as well as pressing time are z. B. in the area of common HDF boards (high density fibreboard).
  • the material according to the invention can be produced excellently in presses such as those used for the production of wood-based materials.
  • panel formats to be produced which - unlike WPC - are not limited to the production of narrow board formats with a width of approx. 30 cm. Rather, conventional panel formats can be provided, as are customary for wood-based panels.
  • the application of the large amounts of binder to the fibers can be done in one step or pass. It has been found, however, that the binding agent can advantageously be applied in at least two steps, with a maximum of 50% of the amount of the binding agent being applied to the fiber in each step. It is particularly preferred to apply a maximum of 35%, in particular a maximum of 25%, of the amount of binder per step to the fiber.
  • the step-by-step application of binder has proven particularly useful for lignocellulosic fibers.
  • the fiber can be dried before or after the binding agent or a partial amount of the binding agent is applied to the fiber.
  • the drying of the fiber after the binder or a partial amount of the binder has been applied has the effect that the fibers provided with binder on the surface do not stick to one another.
  • the aim of drying is therefore not to completely remove water or solvent from the binder and / or the fiber. It should be avoided that the reactivity of the binding agent is impaired during curing under the action of pressure and / or temperature.
  • the only aim is that the fibers no longer adhere to one another or stick together during conveyance or scattering. They are pourable and can z. B. be temporarily stored. But they are also more capable of spreading because they do not stick to the spreading devices, in particular spreading heads.
  • the fibers are preferably dried after each application of a partial amount of the binder. Drying is preferably done with heated air, e.g. B. in a drying tunnel, which is arranged downstream of a device for gluing, or in a drying shaft, the z. B. can be arranged below the device for gluing.
  • heated air e.g. B. in a drying tunnel, which is arranged downstream of a device for gluing, or in a drying shaft, the z. B. can be arranged below the device for gluing.
  • the fiber cake is usually produced by scattering.
  • the fibers either freshly glued or preferably dried with the entire amount of binder, are scattered on a carrier, usually on a conveyor belt, mostly in a homogeneous layer, but alternatively also in several layers.
  • the fiber cake is first passed through a prepress on the carrier and then pressed in a press. Any press that applies sufficient pressure and temperature is suitable, both a plate press in which the material is pressed between two metal sheets and, in particular, a continuous press in which the material is pressed between two rotating metal belts. Suitable pressing temperatures can be selected from 140 ° C. to 220 ° C., preferably from 160 ° C.
  • the pressing time is advantageously 6 seconds / mm sheet thickness (hereinafter: s / mm) to 60 s / mm, usually 10 s / mm to 20 s / mm.
  • a pre-press for compressing the fiber cake can be connected upstream of the actual pressing process.
  • the press can be followed by a device for cooling the plate-shaped material, in particular a device for cooling under a predetermined pressing pressure, which can be less than the pressing pressure during the pressing of the material.
  • the fillers, wet strength agents or water repellants described above can be added to the material according to the invention, typically before the fiber cake is formed.
  • the material produced by the method according to the invention preferably has a surface which essentially has binding agents, particularly preferably a surface which consists of binding agents.
  • hygroscopic fibers e.g. B. lignocellulosic fibers
  • the aim is to have as few fibers as possible in the surface of the material in order to optimize the thickness swelling as much as possible. Water in liquid form or z. B. as air humidity would be absorbed by the hygroscopic fibers and the material would swell as a result. This is undesirable.
  • the high or predominant proportion of binding agent in the plate-shaped material enables a surface of the material which predominantly or completely contains binding agents or which has little or no hygroscopic fibers.
  • the material according to the invention can be like a wood-based panel, e.g. B. like an HDF board, processed.
  • the surface can be coated, embossed or milled; the edges can be profiled, e.g. B. for the production of floor panels.
  • the plate-shaped material according to the invention can be laminated with synthetic resin-impregnated papers, it can be printed, lacquered, glazed or processed in some other way. It is to be regarded as an advantage of this invention that the plate-shaped material can be machined and processed on existing devices.
  • the invention also includes a device for producing the plate-shaped material described above, having means for gluing lignocellulosic fibers with binder, which according to the invention has means for gluing lignocellulosic fibers that have already been glued in advance.
  • the term "glue” here means the application of binder.
  • the means for gluing fibers are advantageously designed as nozzles which generate a spray mist from a liquid-supplied binder. Fibers are guided through the spray of binding agent, on which binding agent droplets from the spray are then deposited.
  • Known means for gluing lignocellulosic fibers are designed so that they apply a maximum of 30% by weight of binder based on the fibers to be glued.
  • the method according to the invention can be carried out in that the fibers to be glued pass the known glueing means several times until sufficient binder has been applied to the fibers.
  • further means for gluing are pre-glued Fibers are used to which a portion of the binder has already been applied.
  • the sheet-like material according to the invention can be adapted to different requirements by different combinations of fibers, binders, fillers and possibly other additives such as waxes. It is therefore expressly pointed out that the features described above can each be freely combined with one another.
  • the invention further relates to the use of the plate-shaped material described above.
  • the plate-like material according to the invention is characterized by the fact that it can be used in a variety of ways because of the minimal swelling, in particular the almost completely reduced swelling in thickness in the area of the edges.
  • the plate-shaped material can be used for.
  • B. can be used as a floor panel or floor laminate.
  • a thickness swelling which is less than 2%, preferably less than 1%, is regarded as insignificant for the purposes of the invention. This z. B.
  • the panel-shaped material according to the invention can also be used as a wall or ceiling panel, as a furniture panel, in particular in the expansion of damp and wet rooms or laboratory and technical rooms or workshops, but not limited to them.
  • the material according to the invention is suitable as a facade panel or for roofing.
  • the plate-shaped material according to the invention can, for. B. can be used for terrace construction including decking or outdoor floors.
  • the plate-shaped material according to the invention can preferably be used for constructions, in particular furniture, in the outdoor area can be used.
  • the expansion of workshops, production halls or stables can, for example, easily take place with the material according to the invention.
  • the figure shows a plate-shaped material 1 with an upper side 2 and an underside 3 and an edge 4.
  • the material has fibers 5 which are embedded in binder.
  • the proportion of the binder is more than 50% by weight of the plate-shaped material. So more binder than fiber 5 is used.
  • Natural, synthetic, organic and inorganic fibers can be used as fibers, both individually and as a mixture.
  • Hygroscopic fibers such as B. wood, cellulose or linen fibers can be used.
  • Melamine is the preferred binder, often in combination with formaldehyde or phenol, but also in a mixture with PMDI. Examples of combinations of fibers and binders are described below.
  • lignocellulosic fibers in this case softwood fibers
  • the fibers were made from steamed wood chips by defibrating in the refiner. Alternatively, any other lignocellulosic fibers or mixtures of such fibers can be used.
  • the softwood fibers are used with a moisture content of 120% before gluing; Before pressing, they are dried to a residual moisture content of 8% with the binding agent on them, d. That is, one ton of fibers contains 80 kg of water.
  • binding agent based on dry wood
  • a binding agent comprising melamine-formaldehyde resin (MF resin).
  • the melamine-formaldehyde resin (MF resin) used had a solids concentration of 60% (measured at 60 min / 120 ° C.).
  • MF resin melamine-formaldehyde resin
  • "atro wood” here refers to lignocellulosic fibers which have been dried at 105 ° C. to constant weight.
  • "atro wood” is a common reference measure for formulations that contain lignocellulosic fibers. The further exemplary embodiments focus on the absolute use of the binder.
  • the binder is applied to the lignocellulosic fibers in four passes, with 27% by weight being applied to the fibers per pass.
  • the liquid binder is sprayed through nozzles in a known device for gluing fibers.
  • the spray generated by the nozzles is deposited on the surface of the fibers that pass the spray, e.g. B. fall from top to bottom through the spray of binder.
  • the device for gluing fibers is followed by a drying of the glued fibers in means for drying, eg. B. a warm air tunnel or duct that applies heated air to the fibers.
  • means for drying eg. B. a warm air tunnel or duct that applies heated air to the fibers.
  • the aim of drying is not to completely remove any liquid, but to dry the binding agent to such an extent that it no longer sticks.
  • the reactivity of the binder during curing under the action of pressure and / or temperature should not be impaired by drying.
  • the fibers can be stored or further glued or processed.
  • a third and fourth passage through the device for gluing and the means for drying are carried out.
  • the 110% by weight binding agent can also be applied to the fibers in one or two passes, alternatively also in five or more passes. The amount of binder applied to the fibers per pass can vary from pass to pass.
  • the plate-shaped material produced in this way is tested for swelling in accordance with DIN 317 and for edge swelling in accordance with DIN 13329.
  • the thickness swelling is determined at one edge of the material as a change in mm based on the initial thickness of 7 mm, absolute and also as a relative change (%).
  • the swelling in thickness according to Table 1 is, as expected, a maximum of approximately 23%.
  • Each pass in which 27% by weight of MF resin is applied, reduces the thickness swelling at the edge of the plate-shaped material.
  • An extremely low value of 1.83% edge swelling is achieved if 108% by weight of binding agent based on dry wood is used.
  • a 50:50 mixture of different fibers here z. B. wood fibers and carbon fibers, alternatively z. B. waste paper fibers and glass wool fibers, alternatively mineral fibers and cellulose fibers are used.
  • the natural fibers wood, waste paper, cellulose fibers
  • the fibers can be mixed before or after gluing and the optional drying of the binder. Both variants allow the production of a homogeneous mixture of glued fibers, which can then be sprinkled into a fiber cake.
  • that is Exemplary embodiment 2 is identical to exemplary embodiment 1 with regard to the use of binder and the use of paraffin.
  • Embodiment 3 relates to a mixture of fibers and binder, in which 50 parts of polyethylene fibers and 20 parts of carbon fibers and 10 parts of filler, e.g. B. glass particles, mineral or ceramic particles form the fiber content, the 115 wt .-% binder, here z. B. with MF resin is glued.
  • the fiber-binder mixture is otherwise treated as in embodiment 1.
  • the aim is to produce a board made of fibers and binders which can be used to produce a floor covering, which can therefore be coated in particular with a decorative surface, in particular either with synthetic resin-impregnated papers or by painting.
  • 5% by weight of other substances are used, here 1.5% by weight of paraffin and 3.5% by weight of "gray" dye.
  • the dye is used to give the plate-shaped material a uniform color.
  • the sheet-like material with the above-mentioned composition is produced on an industrial, continuous press and compared with HDF sheets made from the same fiber material, but with a binder content of 15% by weight, and having a density of 880 kg / m 2 3 have.
  • Table 2 Comparative experiments on the swelling of an HDF board and a board according to the invention attempt Panel thickness (mm) Binder (%) Density (kg / m 3 ) Transverse tensile strength (N / mm 2 ) Swelling raw board (%) Coated edge swell (%) Standard HDF 6 15% 880 > 1.4 18-22 14-18 plate-shaped material 5.8 137.5% 1050 > 4.5 0.1 -, 03 1.0-1.2
  • Table 2 above shows the two panels in comparison, with details of the panel thickness in mm as the gross value (before grinding) and the density in kg / m 3 .
  • the panels were each evaluated for transverse tensile strength (DIN EN 319), swelling (measured according to EN 317) and edge swelling (measured according to EN 13329).
  • the board according to the invention can be compressed more than a fiber board.
  • the use of binding agent is around 9 times higher than with the HDF board according to the state of the art.
  • the sheet-like material according to the invention has a transverse tensile strength that is three times higher and the swelling of the raw sheet is reduced by a factor of 100. After lamination of the top and bottom, the edge swell "coated" is measured. Only the edges are accessible to the action of water, since the top and bottom of the board are sealed by the lamination and are no longer accessible to water. This test is particularly important for floor coverings because the edges of the floor panels usually cannot be sealed and are therefore exposed to water. This shows an edge swelling reduced to a tenth for the panel material according to the invention in comparison with a known HDF panel. Both the HDF board and the sheet-like material according to the invention were produced on the same industrial production facilities.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
EP19170159.8A 2019-04-18 2019-04-18 Matériau sous forme de plaque et son procédé de fabrication Active EP3725481B1 (fr)

Priority Applications (25)

Application Number Priority Date Filing Date Title
PL19170159.8T PL3725481T3 (pl) 2019-04-18 2019-04-18 Materiał płytowy i sposób jego produkcji
EP19170159.8A EP3725481B1 (fr) 2019-04-18 2019-04-18 Matériau sous forme de plaque et son procédé de fabrication
ES19170159T ES3019583T3 (en) 2019-04-18 2019-04-18 Plate-shaped material and method for its manufacture
JP2021559130A JP2022529410A (ja) 2019-04-18 2020-01-09 平面状材料及びその製造方法
CN202410418823.XA CN118181424A (zh) 2019-04-18 2020-01-09 用于涂覆平面工件的方法
JP2021559135A JP2022530186A (ja) 2019-04-18 2020-01-09 平面状ワークピースをコーティングする方法
BR112021020740A BR112021020740A2 (pt) 2019-04-18 2020-01-09 Material plano e método para a produção do mesmo
CN202080029521.3A CN113840701A (zh) 2019-04-18 2020-01-09 用于涂覆平面工件的方法
US17/604,532 US12441024B2 (en) 2019-04-18 2020-01-09 Planar material and method for the production thereof
EP20701536.3A EP3938158B1 (fr) 2019-04-18 2020-01-09 Matériau sous forme de plaque et son procédé de fabrication
AU2020258486A AU2020258486A1 (en) 2019-04-18 2020-01-09 Method for coating a planar workpiece
US17/604,544 US20220306821A1 (en) 2019-04-18 2020-01-09 Method for coating a planar workpiece
UAA202105798A UA129218C2 (uk) 2019-04-18 2020-01-09 Плоский матеріал і спосіб його виготовлення
PCT/EP2020/050451 WO2020211988A1 (fr) 2019-04-18 2020-01-09 Matériau en forme de plaque et son procédé de fabrication
CA3134193A CA3134193A1 (fr) 2019-04-18 2020-01-09 Materiau en forme de plaque et son procede de fabrication
CN202080029160.2A CN113710441B (zh) 2019-04-18 2020-01-09 平面材料和用于生产其的方法
AU2020259631A AU2020259631A1 (en) 2019-04-18 2020-01-09 Planar material and method for the production thereof
EP20701537.1A EP3934871A1 (fr) 2019-04-18 2020-01-09 Procédé pour le revêtement d'une pièce à usiner en forme de plaque
CA3137235A CA3137235A1 (fr) 2019-04-18 2020-01-09 Procede pour le revetement d'une piece a usiner en forme de plaque
BR112021020749A BR112021020749A2 (pt) 2019-04-18 2020-01-09 Método para revestimento de uma peça de trabalho plana
PCT/EP2020/050452 WO2020211989A1 (fr) 2019-04-18 2020-01-09 Procédé pour le revêtement d'une pièce à usiner en forme de plaque
ES20170128T ES2992159T3 (es) 2019-04-18 2020-04-17 Material en forma de tablero y método para su fabricación
PL20170128.1T PL3736095T3 (pl) 2019-04-18 2020-04-17 Materiał w kształcie płyty i sposób jego produkcji
EP20170128.1A EP3736095B1 (fr) 2019-04-18 2020-04-17 Matière sous forme de plaque et son procédé de fabrication
US19/330,388 US20260001252A1 (en) 2019-04-18 2025-09-16 Planar material and method for the production thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19170159.8A EP3725481B1 (fr) 2019-04-18 2019-04-18 Matériau sous forme de plaque et son procédé de fabrication

Publications (3)

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EP3725481A1 true EP3725481A1 (fr) 2020-10-21
EP3725481B1 EP3725481B1 (fr) 2025-03-12
EP3725481C0 EP3725481C0 (fr) 2025-03-12

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EP (1) EP3725481B1 (fr)
ES (2) ES3019583T3 (fr)
PL (2) PL3725481T3 (fr)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
EP4074481A1 (fr) * 2019-07-02 2022-10-19 Flooring Technologies Ltd. Procédé de revêtement d'une pièce à usiner en forme de plaque
EP4364918A1 (fr) * 2022-11-07 2024-05-08 SWISS KRONO Tec AG Procédé de fabrication d'un panneau de particules ainsi que panneau de particules
US12441024B2 (en) 2019-04-18 2025-10-14 SWISS KRONO Tec AG Planar material and method for the production thereof

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US5985429A (en) * 1992-08-31 1999-11-16 Andersen Corporation Polymer fiber composite with mechanical properties enhanced by particle size distribution
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US20070042664A1 (en) * 2005-08-17 2007-02-22 Thompson Gregory J Fiber-containing composite and method for making the same
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WO2011107900A1 (fr) * 2010-03-04 2011-09-09 Basf Se Matériaux lignocellulosiques présentant des propriétés mécaniques satisfaisantes
WO2016071007A1 (fr) * 2014-11-06 2016-05-12 Flooring Technologies Ltd. Panneau dérivé du bois, en particulier sous la forme d'un matériau composite bois-plastique, et procédé pour sa fabrication
CN109249491A (zh) * 2018-07-24 2019-01-22 南京林业大学 一种复合材胶合木的制备方法

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12441024B2 (en) 2019-04-18 2025-10-14 SWISS KRONO Tec AG Planar material and method for the production thereof
EP4074481A1 (fr) * 2019-07-02 2022-10-19 Flooring Technologies Ltd. Procédé de revêtement d'une pièce à usiner en forme de plaque
EP3760403B1 (fr) * 2019-07-02 2023-06-07 SWISS KRONO Tec AG Procédé de revêtement d'une pièce à usiner en forme de plaque
EP4364918A1 (fr) * 2022-11-07 2024-05-08 SWISS KRONO Tec AG Procédé de fabrication d'un panneau de particules ainsi que panneau de particules
WO2024099870A1 (fr) * 2022-11-07 2024-05-16 SWISS KRONO Tec AG Procédé de production d'un panneau de particules et panneau de particules

Also Published As

Publication number Publication date
ES3019583T3 (en) 2025-05-20
PL3725481T3 (pl) 2025-07-14
EP3725481B1 (fr) 2025-03-12
PL3736095T3 (pl) 2024-12-02
EP3725481C0 (fr) 2025-03-12
ES2992159T3 (es) 2024-12-09

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