EP4126484A1 - Production d'un moulage contenant de la lignocellulose, revêtu de matière plastique et imprimable - Google Patents

Production d'un moulage contenant de la lignocellulose, revêtu de matière plastique et imprimable

Info

Publication number
EP4126484A1
EP4126484A1 EP20717100.0A EP20717100A EP4126484A1 EP 4126484 A1 EP4126484 A1 EP 4126484A1 EP 20717100 A EP20717100 A EP 20717100A EP 4126484 A1 EP4126484 A1 EP 4126484A1
Authority
EP
European Patent Office
Prior art keywords
layer
particles
thermoplastic
feature
lignocellulose
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
EP20717100.0A
Other languages
German (de)
English (en)
Inventor
Max Zaher
Volker Thole
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.)
Polymertrend LLC
Original Assignee
Polymertrend LLC
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 Polymertrend LLC filed Critical Polymertrend LLC
Publication of EP4126484A1 publication Critical patent/EP4126484A1/fr
Pending legal-status Critical Current

Links

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
    • B27N3/04—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
    • 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
    • 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
    • B27K5/003—Treating of wood not provided for in groups B27K1/00, B27K3/00 by using electromagnetic radiation or mechanical waves
    • B27K5/0035—Electron beam-radiation
    • 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
    • B27K5/007—Treating of wood not provided for in groups B27K1/00, B27K3/00 using pressure
    • 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
    • B27N3/08—Moulding or pressing
    • B27N3/24—Moulding or pressing characterised by using continuously acting presses having endless belts or chains moved within the compression zone
    • 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
    • B27N7/005—Coating boards, e.g. with a finishing or decorating layer
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/02—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board the layer being formed of fibres, chips, or particles, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
    • C08H8/00—Macromolecular compounds derived from lignocellulosic materials
    • 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
    • B27K2200/10—Articles made of particles or fibres consisting of wood or other lignocellulosic 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
    • 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
    • B27N3/007—Manufacture of substantially flat articles, e.g. boards, from particles or fibres and at least partly composed of recycled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/75—Printability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00—Animal or vegetable based
    • B32B2317/16—Wood, e.g. woodboard, fibreboard, woodchips
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel

Definitions

  • the invention relates to methods and devices for producing a lignocellulose-containing, plastic-coated, printable molded part.
  • the methods and devices use lignocellulosic particles.
  • the particles mentioned here therefore include, in particular, wood-containing and wood-like chips and fibers.
  • Wood chips or wood fibers or wood-like chips or fibers are to be understood here in particular as meaning native cellulose-containing raw materials, such as wood from various tree species and provenance (fresh, old or recycled).
  • wood-like chips or fibers in the context of this description are bamboo, straw from maize or cereals, fiber plants such as flax or jute.
  • ionizing radiation for treatment, in particular for the digestion of native cellulose-containing raw materials for various further processing purposes, is known as such.
  • examples are pest decontamination, the facilitation of so-called refining or fiber disruption in paper production or the acceleration of saccharification and fermentation, e.g. B. in the production of bioethanol.
  • the invention relates to the production of chipboard and MDF / HDF boards.
  • the present application also relates to the problem of printing lignocellulose-containing molded parts, that is to say in particular chipboard and MDF / HDF boards.
  • the printing for example with laser printing or inkjet printing, of lignocellulose-containing molded parts, in particular chipboard and MDF / HDF boards, is very complex.
  • the molded parts or panels must be painted several times with regard to their surface, typically in more than 3 stages.
  • the device is technically and procedural ⁇ renstechnisch consuming and expensive.
  • the present invention has the object to provide methods and devices to which a lignocellulose molding with minimal equipment and process engineering effort is preparable insbeson ⁇ particular so that it can be printed and optionally printed.
  • a method for producing a lignocellulose-containing plastic-coated and printable molded part includes the following steps: molded part to be produced (26); b) applying a layer (C) of particles which contain electron beam-reactive thermoplastic to the layer produced according to the above feature; c) heating the layers (A, C) produced according to the above features in such a way that thermoplastic particles melt into the layer containing lignocellulose-containing particles (Cs); d) pressing the layers heated according to feature (lc); and e) irradiating the layers pressed according to feature (ld) with electrons in the energy range from 1 MeV to 10 MeV.
  • MDF / HDF molded parts, in particular panels can advantageously be produced with regard to the above-mentioned problems / goals in such a way that they have an outer polymer layer that can be easily printed, in particular with laser printing or with inkjet printing.
  • a layer of particles is to be produced before the above-mentioned step a), which contain an electron beam reactive thermoplastic and to which the layer containing the lignocellulose-containing particles is applied in accordance with step a) above.
  • Said particles containing electron beam reactive thermoplastic preferably consist essentially of thermoplastic.
  • the above-mentioned method steps are preferably carried out one after the other in the specified order.
  • the heating according to data ⁇ can times lc) and the pressing in accordance with feature d) are carried out wholly or partly overlapping in time.
  • thermoplastic particles melt into the layer containing lignocellulose-containing particles
  • thermoplastic particles which can also consist entirely of thermoplastic particles, means that not the entire layer of thermoplastic particles melts, but only part of it into the adjacent lignocellulose-containing particles (i.e. in particular wood particles ) containing layer penetrate melted by the heating and thus bring about an optimal connection of the layers, while on the outside of the molded part a smooth layer of essentially thermoplastic material is created, which can be printed without further complex measures, in particular in inkjet printing or laser printing.
  • the layer according to feature a) contains lignocellulose-containing fine particles and after step a) and before step b) the following steps are carried out: aa) applying a layer (A ') containing lignocellulose-containing coarse particles.
  • the invention also relates to apparatuses for carrying out the above Ver ⁇ drive being provided for the individual process steps mentioned above in each case a ⁇ A device for performing the method step.
  • the methods of the invention can also be used to bring a product made in her ⁇ kömmaji manner mold part, such as a chipboard or an MDF / HDF plate in a well-printable state.
  • a layer of particles can be sprinkled on the conventionally produced chipboard or the MDF / HDF board, which contain electron beam reactive thermoplastic or essentially consist of it, after which the intermediate product produced in this way is heated in such a way that some of the thermoplastic particles enter the fitting, lignocellulose-containing particles containing layer penetrate melting, whereupon the so it is pressed ⁇ sired intermediate product and is subsequently irradiated with electrons in said energy range.
  • thermoplastic particles melt into the layer containing lignocellulose-containing particles is preferably carried out at temperatures from 100.degree. C. to 180.degree. C., in particular at 160.degree. C. to 170.degree.
  • the above-mentioned pressing process takes place in particular with pressures of 30 bar to 50 bar.
  • layers containing electron beam reactive thermoplastics are mentioned on the one hand and layers containing lignocellulose-containing particles on the other hand. These are preferably, on the one hand, essentially thermoplastic-containing layers and, on the other hand, layers essentially containing wood-like particles. The particles are each suitable for scattering in the area.
  • a polymer (also in particle form) can be added to the layers containing lignocellulose-containing particles, these added polymer particles bringing about an overall crosslinking including the lignocellulose particles and the polymers when irradiated with electrons.
  • the lignocellulose-containing particles can also be irradiated with electrons in the energy range from 1 MeV to 10 MeV before or when they are used for the first time in one of the processes mentioned here. Two such irradiations then take place in the process.
  • thermoplastic 5% to 30% by weight of a thermoplastic can be added to the layers of lignocellulose-containing particles (wood particles).
  • lignocellulose-containing particles wood particles.
  • WPC molded part wood-plastic composite
  • 30% to 60% by mass of a polymer of the type mentioned above are mixed in.
  • FIG. 1 shows the production of a particle board without a polymer coating
  • FIG. 2 shows a standard chipboard in section, as it is produced with an apparatus and a method according to FIG. 1;
  • FIG. 3 shows the production of a chipboard with a polymer layer on both sides;
  • FIG. 4 shows a chipboard produced with a device according to FIG. 3 with polymer layers on both sides;
  • FIG. 5 shows the production of a particle board with a one-sided polymer layer
  • FIG. 6 shows a chipboard with a one-sided polymer layer produced with a device according to FIG. 5;
  • FIG. 7 shows the production of an MDF / HDF board with polymer layers on both sides
  • FIG. 8 shows an MDF / HDF board produced with a device according to FIG. 7 with polymer layers on both sides;
  • FIG. 9 shows the production of an MDF / HDF board with a polymer layer on one side
  • FIG. 10 shows an MDF / HDF board produced with a device according to FIG. 9 with a one-sided polymer layer.
  • FIG. 1 generally illustrates an apparatus and method 10 for making conventional particle board as a starting point of the present invention.
  • the method in FIG. 1 runs from left to right in terms of time and space.
  • “Lignocellulose-containing particles” are, by way of example, “wood particles” below.
  • a wood fine particle spreader spreads over a large area in a manner known as such
  • wood flour is also used for such fine wood particles.
  • a wood coarse particle spreader 14 scatters a layer of wood coarse particles on the layer of wood fine particles.
  • the coarse wood particles can also be used as wood shavings are designated.
  • a further wood fine particle spreader 16 scatters a layer of wood fine particles on the layer of wood coarse particles.
  • the fine particles and the coarse particles as used here have dimensions that are customary in the manufacture of three-layer chipboard. The fine particles therefore have smaller dimensions than the coarse particles.
  • the conveyor belt 24 conveys the three layers thus scattered on top of one another into a preheater 18 and from there the layers pass into a press 20.
  • the press 20 the pressed molded parts 26 are conveyed to an electron gun 22, where they are filled with electrons in the energy range between 1 MeV and 10 MeV are irradiated.
  • FIG. 2 shows a standard chipboard produced in this way with a central wood coarse particle layer A, an upper wood fine particle layer B and with a lower wood fine particle layer B '.
  • corresponding components are each provided with chen same forceszei ⁇ wherein gegebe at various points components used ⁇ are appropriate, provided with a bar or with two strokes.
  • thermoplastic 3 shows an apparatus and a method for producing a particle board which is provided with a polymer layer on both sides.
  • a polymer which is thermoplastically deformable and meltable by the action of heat is referred to below as a thermoplastic.
  • thermoplastic particle spreader 30 scatters a layer of fine thermoplastic particles onto the conveyor belt 24.
  • a wood fine particle spreader 12 then scatters a layer of wood fine particles onto the layer of thermoplastic particles.
  • a coarse wood particle spreader then scatters a layer of coarse wood particles onto the above-mentioned layer of fine wood particles.
  • another wood fine particle spreader 12 'scatters a layer of wood fine particles on the layer of wood coarse particles.
  • a further thermoplastic particles spreaders 30 ' a layer of fine thermoplastic particles scattered on the produced layer of wood fine ⁇ particles.
  • the layer thicknesses of the thermoplastic particle layers mentioned are preferably in the range from 100 to 500 micrometers ( ⁇ m).
  • the thickness of the polymer layers produced with the thermoplastic particles is preferably the same on both sides of the molded part. This has the advantage that warping (deformation) of the molded part is counteracted (the so-called “banana effect” is avoided).
  • the intermediate product with the five layers mentioned is conveyed into a preheating device 18, where, depending on the polymers or thermoplastics used, heating to temperatures in the range from 100 to 180 ° C., typically takes place in the range from 160 to 170 ° C.
  • the thermoplastic particles melt and the molten thermoplastic partially penetrates the adjacent layer of fine wood particles and thus creates an intimate connection between the polymer layer and the wood particle layer.
  • the intermediate product processed in this way is then fed into a press 20, where the plates are pressed with pressures between 30 and 50 bar.
  • the intermediate products are then fed into the electron gun 22 and irradiated over the entire area with electrons in the energy range between 1 MeV and 10 MeV.
  • the plates are then turned through 180 ° and the other side of the plates is also irradiated with electrons in the energy range between 1 MeV and 10 MeV.
  • a central wood coarse ⁇ particle layer A has on both sides of timber fine particle layers as the outside, lie on either side polymer layers C, C.
  • the outer-side polymer layers C, C are each connected by fusion bonding layers Cs with the respective adjacent timber fine particle layer.
  • Fig. 5 shows a device for producing a chipboard with a polymer ⁇ layer on one side.
  • a thermoplastic particle spreader 30 applies an upper layer of thermoplastic particles and then preheating and pressing with a preheating device 18 or one Press 20 and electron irradiation of the molded parts 26 in an electron gun 22, as described above with reference to FIG. 3.
  • the statements made above in connection with FIGS. 3 and 4 with regard to layer thicknesses, added polymers to the wooden parts, etc. apply to all exemplary embodiments.
  • the molded part 26 produced with the device according to FIG. 5 is shown in section in FIG. 6.
  • a central wood coarse particle layer A ' has wood fine particle layers B' on both sides and a polymer layer C on one side, which is firmly connected to the wood fine particle layer B ’below it via a fusion bonding layer Cs.
  • Fig. 7 shows an apparatus for the production of an MDF / HDF board (medium density fiber board / high density fiber board) with a polymer layer on both the top and the bottom.
  • MDF / HDF board medium density fiber board / high density fiber board
  • thermoplastic particle spreader 30 scatters a layer of thermoplastic particles onto the conveyor belt.
  • a wood fiber spreader 32 scatters a layer of wood fibers from said layer of thermoplastic particles.
  • a mat former 34 forms the two mentioned layers into a fleece.
  • a second thermoplastic particle spreader 30 'scatters a layer of thermoplastic particles thereon. Thereafter, the thus Herge ⁇ passes presented intermediate in the manner already described in a preheater 18 and into a press 20 and an electron gun 22 in the above with reference to for example Fig. Manner described. 5
  • Fig. 9 shows an apparatus for producing an MDF board with a polymer layer on only one side.
  • a wood fiber spreader 332 spreads a layer of Holzfa ⁇ fibers.
  • a mat former 34 forms the wood fiber layer produced in this way.
  • a thermoplastic particle spreader 30 scatters a layer of thermoplastic particles thereon. From there, the intermediate product passes into the preheater 18, the press 20 and the electron gun 22, as described above.
  • Fig. 10 shows the MDF board thus prepared with a single-side coated poly ⁇ cell layer.
  • the wood fine particle layers and the wood coarse particle layers can be mixed with polymers which crosslink under electron bombardment.
  • the references in the claims to figures serve to facilitate the assignment to the exemplary embodiments and are not part of the claims.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Electromagnetism (AREA)
  • Physics & Mathematics (AREA)
  • Toxicology (AREA)
  • General Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

L'invention concerne un procédé de production d'un moulage contenant de la lignocellulose, revêtu de matière plastique et imprimable (26), en particulier sous forme de feuille, comprenant les étapes consistant à : a) produire une couche (A, B') contenant des particules contenant de la lignocellulose en fonction de la forme du moulage à produire (26) ; b) appliquer une couche (C) de particules contenant une matière thermoplastique réactive à un faisceau d'électrons sur la couche produite en fonction de la caractéristique précédente ; c) chauffer les couches (A, C) produite en fonction des caractéristiques précédentes de sorte que les particules thermoplastiques fondent dans la couche contenant les particules contenant de la lignocellulose (Cs) ; d) presser les couches chauffées en fonction de la caractéristique (1c) ; et e) irradier les couches pressées en fonction de la caractéristique (1d) avec des électrons dans la plage d'énergie de 1 MeV à 10 MeV. Le procédé est par exemple explicité en référence à une feuille de MDF pourvue d'une couche de polymère.
EP20717100.0A 2020-03-24 2020-03-24 Production d'un moulage contenant de la lignocellulose, revêtu de matière plastique et imprimable Pending EP4126484A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2020/058087 WO2021190728A1 (fr) 2020-03-24 2020-03-24 Production d'un moulage contenant de la lignocellulose, revêtu de matière plastique et imprimable

Publications (1)

Publication Number Publication Date
EP4126484A1 true EP4126484A1 (fr) 2023-02-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20717100.0A Pending EP4126484A1 (fr) 2020-03-24 2020-03-24 Production d'un moulage contenant de la lignocellulose, revêtu de matière plastique et imprimable

Country Status (3)

Country Link
US (1) US20230130260A1 (fr)
EP (1) EP4126484A1 (fr)
WO (1) WO2021190728A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2740943B2 (ja) * 1994-10-31 1998-04-15 大日本印刷株式会社 耐摩耗性を有する化粧材
SE516696C2 (sv) * 1999-12-23 2002-02-12 Perstorp Flooring Ab Förfarande för framställning av ytelement vilka innefattar ett övre dekorativt skikt samt ytelement framställda enlit förfarandet
US7846295B1 (en) * 2008-04-30 2010-12-07 Xyleco, Inc. Cellulosic and lignocellulosic structural materials and methods and systems for manufacturing such materials
CA2878266A1 (fr) * 2012-07-13 2014-01-16 Darko Pervan Procede de revetement d'un panneau de construction au moyen d'une technique d'impression/de revetement numerique

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