WO2016112554A1 - Panneau décoratif composite bois-plastique et son procédé de fabrication - Google Patents

Panneau décoratif composite bois-plastique et son procédé de fabrication Download PDF

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Publication number
WO2016112554A1
WO2016112554A1 PCT/CN2015/070955 CN2015070955W WO2016112554A1 WO 2016112554 A1 WO2016112554 A1 WO 2016112554A1 CN 2015070955 W CN2015070955 W CN 2015070955W WO 2016112554 A1 WO2016112554 A1 WO 2016112554A1
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WO
WIPO (PCT)
Prior art keywords
wood
plastic composite
core
decorative
plastic
Prior art date
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PCT/CN2015/070955
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English (en)
Chinese (zh)
Inventor
王清文
易欣
王小玉
黄浪
宗广功
陈园
谢延军
于伸
Original Assignee
王清文
易欣
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 王清文, 易欣 filed Critical 王清文
Priority to CN201580068278.5A priority Critical patent/CN107428133A/zh
Priority to PCT/CN2015/070955 priority patent/WO2016112554A1/fr
Publication of WO2016112554A1 publication Critical patent/WO2016112554A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • 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
    • B27N3/08—Moulding or pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse

Definitions

  • the invention relates to a decorative board and a manufacturing method thereof, in particular to a wood plastic composite decorative board and a manufacturing method thereof.
  • a method for manufacturing a wood-plastic composite (WPC) decorative sheet based on extrusion, molding or bonding, and the manufactured sheet has a tendency to creep and warp, resulting in furniture and interior decoration using the decorative panel. Defects in component deformation, poor decorative effect, and high density are too heavy to handle.
  • Most of the solid wood decorative panels in the prior art are subject to the specifications of the materials.
  • the wood-based wood-based panels need to be bonded with a large amount of adhesive on the substrate during the manufacturing process.
  • the adhesive layer is easily exposed to the air. On the one hand, the exposed adhesive layer will continue to pollute the environment with the decomposition and volatilization of the adhesive.
  • the invention solves the problem that the wood plastic composite decorative board is easy to creep, easy to warp and easily deform, and affects the decorative effect, and further proposes a wood plastic composite decorative board and a manufacturing method thereof.
  • the technical proposal adopted by the invention is: using a thermoplastic wood-plastic composite material after being melted and co-extruding with a wood core, and manufacturing a decorative board by a decorative process, the method comprising the steps of preparing a wood core; preparing a thermoplastic wood-plastic composite material mother And melting the wood-plastic composite masterbatch by a co-extrusion device that can feed the wood core, and co-extruding the sheet with the wood core; and performing the b-step extrusion of the sheet a step c of the decorative processing; a step d of cooling the shaped sheet; a step e of cutting the sheet; and a step f of closing the end surface of the sheet in the e step.
  • the wood core By feeding the wood core in the co-extrusion device and coextruding the wood-plastic composite masterbatch with the wood core, the wood core replaces a part of the wood plastic to reduce the overall density of the decorative board, due to the wood core to the wood-plastic
  • the shortcomings of the wood plastics that are easily creepable are greatly weakened, so that the wood-plastic composite decorative board can be used normally under the condition of a certain temperature difference without being affected by the creep of wood plastic; by co-extrusion and after cutting
  • the end face of the plate block is closed, which can solve the problem that the water molecules in the air enter the glue layer or the wood cells, so that the decorative plate has water resistance, avoiding the problems of cracking, warping, deformation, strength drop and mildew decay of the decorative plate.
  • the production of ordinary wood-plastic composite materials is cooled immediately after extrusion of the sheet material, and then subjected to decorative processing after being cooled, and the present invention is carried out on the sheet material extruded in step b.
  • the decorative processing and cooling of the sheet after the step c of the decorative processing is completed, so that the wood-plastic composite has a longer time for the slow knot after the co-extrusion operation.
  • Fig. 1 is a flow chart showing the manufacturing method of the present invention.
  • a method for manufacturing a wood-plastic composite decorative panel comprising the step a of preparing a wood core; preparing a thermoplastic wood-plastic composite master batch and passing the wood-plastic by a co-extrusion device that can feed the wood core a step b of co-extruding the composite masterbatch with the wood core; a step c of decorating the plate extruded in step b; and a step d of cooling and decorating the decorated plate a step e of cutting off the sheet; and a step f of closing the end surface of the sheet of the step e.
  • a method for manufacturing a wood-plastic composite decorative panel includes a step a of preparing a wood core, preparing a thermoplastic wood-plastic composite master batch, and co-extruding through the wood core that can be fed a step b of melt-extruding the wood-plastic composite masterbatch and coextruding the sheet with the wood core; a step c of decorating the sheet extruded by the step b; and a decorative processed sheet a step d of cooling setting; a step e of cutting off the sheet; and a step f of closing the end surface of the sheet in the step e.
  • the technical effect of the embodiment is that the overall density of the decorative panel is reduced by feeding the wood core in the co-extrusion device and coextruding the wood-plastic composite masterbatch with the wood core, so that the wood core replaces a part of the wood plastic. Due to the pinning of the wood core to the wood plastic, the shortcomings of the wood plastic original creep are greatly weakened, so that the wood plastic composite decorative board can be normally used under the condition of a certain temperature difference without being affected by the wood plastic creep; Co-extrusion and sealing of the cut end face of the sheet can solve the problem of water molecules entering the glue layer or wood cells in the air, so that the decorative board has water resistance and avoids cracking, warping, deformation and strength of the decorative board.
  • step b The extruded sheet is subjected to decorative processing and the sheet is cooled and shaped after the step c of the decorative processing is completed, so that the wood-plastic composite is after the co-extrusion operation Slower crystallization for a longer period of time, promote the crystal uniformity and regularity of the polymer matrix, reduce the internal stress and reduce the possibility of deformation and bending of the wood-plastic composite decorative panel, and improve the comprehensive mechanical properties of the wood-plastic composite decorative panel. And dimensional stability.
  • the wood core processing method in the step a is: firstly, a solid wood rotary cutting veneer is selected, and a vinyl acetate emulsion and an acrylic resin are applied on the surface of the veneer. , an acrylic-polyurethane resin, an isocyanate, a melamine-urea aldehyde, a urea-formaldehyde glue or a phenolic aldehyde glue, and then cross-stacked the composite panels in a warp and weft direction according to the veneer texture, and then applying pressure to the blank sheet and standing to obtain a laminate. The laminate is further subjected to a drying treatment, and the dried laminate is cut to obtain the wood core.
  • the technical effect of the embodiment is that the wood core is manufactured by using the method for manufacturing a laminate, which is advantageous for overcoming the heterogeneity of the mechanical properties of the wood in all directions, and the obtained wood core is not easily deformed or warped.
  • the mechanical properties of the finished decorative panel are more stable, and the decorative panel is not easily warped or deformed.
  • the wood core processing method in the step a further comprises: processing the both ends of the dried laminated wood core by a milling cutter to obtain a mutual fit Finger jointing hoe, and then treating the mutually matching finger joints with melamine-urea aldehyde, urea-formaldehyde glue or phenolic glue, and then applying opposing pressure on both ends of the laminate wood core to splicing the laminate wood core end-to-end, Get the wood core.
  • the wooden core can be made shorter by manufacturing the finger joints which are matched with each other and treating the mutually matching finger joints with polyvinyl acetate emulsion, melamine-urea, urea-formaldehyde or phenolic glue.
  • the material is obtained by long-splicing and splicing, which can realize long-term use of short materials and large-scale use of materials; since the method of co-extrusion of wood core and wood-plastic composite material is adopted, the wood core is enclosed in the wood-plastic composite material, so the external The moisture does not enter the interior of the wood-plastic composite decorative board, so that the water-based adhesive and the emulsion adhesive which are not suitable for the manufacture of the decorative board can be used for the wood-plastic composite decorative board, and the method can help reduce the wood-plastic composite decoration.
  • the manufacturing cost of the board at the same time, the volatile emissions that may be generated by the adhesive of the wood core adhered to the interior of the decorative board are not released into the environment, and the thermosetting resin adhesives which are not suitable for the manufacture of the decorative board are all unsuitable. Can be used to make wood-plastic composite decorative panels.
  • step of coextruding the sheet in step b requires simultaneous feeding of a plurality of narrow strips of wood core by a co-extrusion apparatus.
  • the narrow strips of wood that are fed flat are not in direct contact and separated by a certain distance, and the molten wood-plastic composite masterbatch is coextruded with a plurality of said narrow strips of wood core.
  • the technical effect of the embodiment is that by feeding a plurality of the wood cores in parallel at the same time, each wood core is not directly contacted and separated by a certain distance, so that it is convenient to be in the wood core and wood according to the width after the decorative sheet is manufactured.
  • the wood-plastic composite part between the cores is cut without exposing the wood core of the processed wood-plastic composite decorative board to the air, thereby avoiding cracking, warping, deformation, strength reduction of the wood-plastic composite decorative board, and
  • the problem of mildew decay and other problems can improve the application field of wood-plastic composite decorative panels and simplify the production process of wood-plastic composite decorative panels; since wood is an anisotropic material, parallel feeding of multiple wood cores can balance wood The anisotropy may bring stress to the sheet, which makes the sheet obtained by processing more flat and less deformable.
  • the present embodiment differs from Embodiment 4 in that the co-extrusion apparatus described in the step b includes a wood-plastic extruder, a co-extrusion mold, and a wood core conveying device, and the co-extrusion mold has a mold body and a plurality of a root wood co-feed end, a wood-plastic whole plate discharge end, and the co-extrusion die is mounted on the head of the wood-plastic extruder in step b, so that the plurality of wood cores are fed together
  • the wood plastic whole board discharge end is at Arranging in the same plane and in the same direction, the plurality of wood core co-feeding ends and the wood-plastic whole plate discharge ends are respectively located on two sides of the co-extrusion die, thereby further melting the thermoplastic wood-plastic composite
  • the material masterbatch coats the wood core in a co-extrusion mold to obtain a coextruded sheet material wrapped with a thermoplastic wood-
  • the technical effect of the embodiment is that the wood-plastic extruder, the co-extrusion die and the wood core conveying device are arranged to ensure that the plurality of wood cores are controlled by the wood core transmission at the same time, and maintain a stable rate to ensure the plate material. Quality; by setting multiple wood core co-feed ends and wood-plastic whole plate discharge ends in the same direction on the same plane, it is possible to ensure that the co-extruded sheets are flat.
  • Embodiment 6 The difference between this embodiment and Embodiment 5 is that the co-extrusion die used in step b further includes a wood core guiding edge, a co-extrusion flow channel, a split flow channel on the mold body, and the wood core a plurality of the wood core guiding ribs are disposed on the inner wall of the feeding end, and the coextrusion flow passage is distributed by a plurality of places circumferentially distributed along the inner wall of the feeding end of the wood core and communicating with the inner wall of the feeding end of the wood core a split flow channel communicating component, the split flow channel is a tapered flow channel, and a corner of the plurality of split flow channels has a corner, and the split flow channel is connected to the wood core feed end on the mold body The profile discharge end on the mold body is wrapped around the coextrusion flow passage.
  • the technical effect of the embodiment is that the wood core guiding rib is provided to help the wood core enter the mold body in a predetermined direction, so that the relative position of the wood core and the coextrusion flow passage does not change during the feeding process, and
  • the wood-plastic composite material that ensures that the wood core is melted inside the co-extrusion mold maintains a stable feed under pressure, and finally ensures that the position of the wood core relative to the outer surface of the wood-plastic composite floor is fixed.
  • the technical effect of the embodiment is that since the plate which has just been co-extruded has the large heat after the co-extrusion of the wood-plastic composite, the plate is still in a high temperature state inside and outside the wood-plastic composite material, and the co-extruded plate is
  • the thermal transfer decorative processing not only makes the decorative processing process save energy without additional heating of the sheet, but also makes the thermal transfer decorative layer obtained by thermal transfer more firmly because of the high temperature hot processing; ordinary thermal transfer
  • the pressure applied to the surface of the object is generally 4 to 6 kg/cm 2 to ensure that the thermal transfer decorative layer adheres firmly to the printed matter, and the phenomenon of pattern deformation and the printing layer is too thin, and the method of the present invention is used.
  • the step of setting the cooling setting after the step of transferring the pattern is completed is advantageous for obtaining a thermoplastic wood-plastic composite shell layer having a uniform thickness, which can make the appearance of the wood-plastic composite floor more smooth and smooth. More stable, the sheet material can obtain a surface having a stable performance.
  • Embodiment 8 The difference between this embodiment and Embodiment 7 is that the thermoplastic wood-plastic composite masterbatch in step b is obtained by the following steps: weigh 30-60 parts of thermoplastics, 40 ⁇ by mass parts. 70 parts of lignocellulosic material, 0-8 parts of reinforcing material, 1-10 parts of coupling agent or interfacial compatibilizer, 0.1-6 parts of lubricant, 0-6 parts of coloring agent, 0.1-3 parts Anti-aging agent, 0 ⁇ 7 parts of heat stabilizer, 0 ⁇ 20 parts of flame retardant, 0 ⁇ 15 parts of mineral filler, put the weighed raw materials into high-speed mixer, control temperature is 25°C ⁇ The thermoplastic wood-plastic composite masterbatch is obtained by mixing at 500 ° C for 5 min to 20 min, and the wood-plastic composite masterbatch directly enters the co-extrusion equipment to participate in co-extrusion.
  • the technical effect of the embodiment is that by using the above method to manufacture a thermoplastic wood-plastic composite masterbatch, a wood-plastic composite material with sufficient mixing, uniform material, good fluidity and stable performance can be obtained with minimum energy consumption, so that The wood-plastic composite decorative board can make the wood-plastic composite decorative board base material uniform in color, small in color difference and stable in performance, and it is not easy to cause warping deformation of wood-plastic composite decorative board due to internal stress of wood-plastic composite material.
  • the wood-plastic composite masterbatch directly enters the co-extrusion equipment to participate in co-extrusion, which helps to reduce operational complexity, reduce worker workload, reduce energy consumption, and improve production efficiency of wood-plastic composite decorative panels.
  • thermoplastic wood-plastic composite masterbatch in step b also needs to be obtained by cooling the wood-plastic composite material mixed by a high-speed mixer. At room temperature, a premix is obtained, and the premix is placed in a twin-screw granulator at a controlled temperature of 145 ° C to 235 ° C, a rotation speed of 30 r / min to 100 r / min, and then obtained by cooling and cutting process. Granular wood-plastic composite masterbatch, the granular wood-plastic composite masterbatch is reserved.
  • the technical effect of the embodiment is that: by adjusting the temperature and the rotation speed of the twin-screw granulator, the above-mentioned thermoplastic wood-plastic composite material is properly melted without destroying the lignocellulosic material.
  • the properties and effects of reinforcing materials, coupling agents or interfacial compatibilizers, lubricants, colorants, anti-aging agents, heat stabilizers, flame retardants and mineral fillers in wood-plastic composite decorative panels are produced by the above method.
  • thermoplastic wood-plastic composite masterbatch and the use of the granular wood-plastic composite masterbatch obtained by the method to manufacture the wood-plastic composite decorative board can better realize the melt extrusion process in the step b, since the granular wood-plastic material will be prepared
  • the process of the composite masterbatch is separated from the other processes in step b, so that the preparation of the masterbatch and the co-extrusion process may not be completed at the same time, thereby making the extrusion process of the wood-plastic composite decorative panel easy to control, so that the co-extrusion
  • the quality of wood-plastic composite decorative board products is more stable and reliable.
  • thermoplastic described in step b is polypropylene, polyethylene, polystyrene, acrylonitrile-butadiene-styrene copolymer and polychlorinated a mixture of one or more of ethylene, or a thermoplastic which is a maleic anhydride graft modified product of one or a mixture of polypropylene, polyethylene, polystyrene, a thermoplastic being a raw material, a recycled material Or a mixture of a raw material and a recycled material;
  • the lignocellulosic material is a mixture of one or more of wood fiber powder, rice husk powder, bamboo fiber powder, hemp fiber powder, cotton fiber powder, and straw fiber powder;
  • the reinforcing material is polyamide fiber, polyester fiber or carbon fiber;
  • the coupling agent is a silane coupling agent, a titanate coupling agent, maleic anhydride, male
  • the technical effect of the embodiment is that the above embodiment solves the problem of compatibility between different plastic components in the waste plastic, and can use an inexpensive mixture, and on the other hand, solves the problem of plastic and lignocellulosic materials.
  • the wood-plastic composite flooring produced by this method is beneficial to the recycling of recycled plastics and biomass waste, thereby helping to reduce the wood-plastic composite floor.
  • the manufacturing cost, and the wood-plastic composite floor produced by the method can be recycled, crushed, melted and put into use after being discarded; using the method to manufacture the wood-plastic composite floor can also make the floor end face closed without using glue
  • the adhesive is melt-bonded with a thermoplastic, thereby avoiding the problem that the adhesive is not resistant to water due to the end face closure, and the adhesive is not safe to release the adhesive.
  • the present embodiment differs from any of Embodiments 1 to 10 in that it further includes a step of dip-coating a paraffin or a water repellent paint on the end surface in a step e of closing the end surface.
  • the technical effect of the embodiment is that the process of dip-coating the paraffin or the waterproof coating on the exposed wooden core is simple and convenient to realize the industrial operation, and the waterproof and moisture-proof of the end portion can be effectively realized, thereby ensuring the quality of the wood-plastic composite decorative panel.
  • a method for manufacturing a wood-plastic composite decorative panel according to the present embodiment is: preparing a wood core having a cross section of 20 mm ⁇ 20 mm by pine shaving; and weighing 38 high density poly by mass parts.
  • Ethylene plastic 62 parts of 40-80 mesh wood fiber powder, 1 part polyester fiber, 3 parts of silane coupling agent, 1 part of polyethylene wax, 1 part of graphite, 1 part of UV absorber UV-9, 1 part of laurel Dibutyltin acid, 1.5 parts of expandable graphite, 5 parts of calcium carbonate powder, the weighed raw materials are placed in a high-speed mixer, the temperature is controlled at 100 ° C, mixed for 15 min to obtain a thermoplastic wood-plastic composite masterbatch, which can be fed through
  • the wood core co-extrusion device melts the wood-plastic composite masterbatch and coextrudes the sheet with the wood core; performs thermal transfer processing on the extruded sheet; and performs thermal transfer processing
  • the plate is cooled and shaped; the plate is cut to length; the end face of the plate is closed.
  • the technical effect of the embodiment is that the preparation of the wood core composite by using the pine wood square and the wood fiber powder of 40-80 mesh is beneficial to improve the creep resistance of the board.
  • a method for manufacturing a wood-plastic composite decorative panel according to the embodiment is: selecting a solid wood rotary-cut veneer, applying a vinyl acetate emulsion on the surface of the veneer, and crossing the veneer texture according to the veneer texture Laminated assembled panels, pressure applied to the blanks and allowed to stand to obtain a laminate, which is dried, and the dried laminate is cut to obtain a laminate having a cross-section of 20 mm ⁇ 20 mm.
  • a wooden core which is processed by a milling head at both ends of the dried laminated wood core to obtain mutually matching finger joints, and then the mutually matching finger joints are treated with melamine-urea, urea-formaldehyde or phenolic glue, and then Applying opposing pressure to both ends of the laminate wood core to make the wood core of the laminate spliced end to end to obtain a wood core; weighing 40 parts of polypropylene plastic and 60 parts of 40-80 mesh wood fiber powder by mass parts.
  • thermoplastic wood-plastic composite masterbatch melting the wood-plastic composite masterbatch by co-extrusion equipment that can feed the wood core, and coextruding the sheet with the wood core; Plate for thermal transfer processing; will be subjected to thermal transfer processing Cooling and shaping plate material; length limitation no longer than 2.4 meters plate, the plate material fixed length truncation; the end face plate for blocking.
  • the technical effect of the embodiment is that the wood-plastic composite decorative board is prepared by adopting the embodiment, so that the creep resistance and the heat deformation resistance of the decorative board are further improved, and the aging test has no penetration and no deformation.
  • the wood core By feeding the wood core in the co-extrusion device and coextruding the wood-plastic composite masterbatch with the wood core, the wood core replaces a part of the wood plastic to reduce the overall density of the decorative board, due to the wood core to the wood-plastic
  • the shortcomings of the wood plastics that are easily creepable are greatly weakened, so that the wood-plastic composite decorative board can be used normally under the condition of a certain temperature difference without being affected by the creep of wood plastic; by co-extrusion and after cutting
  • the end face of the plate block is closed, which can solve the problem that the water molecules in the air enter the glue layer or the wood cells, so that the decorative plate has water resistance, avoiding the problems of cracking, warping, deformation, strength drop and mildew decay of the decorative plate.
  • the production of ordinary wood-plastic composite materials is cooled immediately after extrusion of the sheet material, and then subjected to decorative processing after being cooled, and the present invention is carried out on the sheet material extruded in step b.
  • the decorative processing and cooling of the sheet after the step c of the decorative processing is completed, so that the wood-plastic composite has a longer time for the slow knot after the co-extrusion operation.
  • DETAILED DESCRIPTION OF THE INVENTION 1 The relevant performance indicators of 2-13 products are shown in Table 1.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Forests & Forestry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
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  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

Panneau décoratif composite bois-plastique (WPC) et son procédé de fabrication, le panneau décoratif WPC comprenant : une couche enveloppe composée d'un matériau WPC thermoplastique et d'une couche noyau composée d'un noyau en bois en forme de panneau. La couche noyau composée du noyau en bois en forme de panneau est recouverte par la couche enveloppe WPC thermoplastique, et une couche décorative imprimée par une technique de transfert thermique est disposée sur l'extérieur de la couche enveloppe. Le procédé de fabrication du panneau décoratif WPC comprend : a, la préparation d'un noyau en bois ; b, la préparation des matériaux sources WPC thermoplastiques, la fusion des matériaux sources WPC par un dispositif de co-extrusion pouvant recevoir le noyau en bois, et la coextrusion des matériaux sources fondus et du noyau en bois pour former un matériau de panneau comprenant le noyau en bois comme intérieur du matériau de panneau et le matériau WPC comme extérieur du matériau de panneau ; c, la réalisation d'un traitement décoratif sur le matériau de panneau extrudé ; d, le refroidissement et le façonnage du matériau de panneau traité décoratif ; e, la découpe du matériau de panneau refroidi et façonné ; et f, la fermeture hermétique d'une surface d'extrémité du matériau de panneau. Le panneau décoratif WPC fabriqué par le procédé est résistant au fluage, et présente une bonne propriété mécanique générale et une bonne stabilité structurale.
PCT/CN2015/070955 2015-01-17 2015-01-17 Panneau décoratif composite bois-plastique et son procédé de fabrication WO2016112554A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201580068278.5A CN107428133A (zh) 2015-01-17 2015-01-17 一种木塑复合装饰板及其制造方法
PCT/CN2015/070955 WO2016112554A1 (fr) 2015-01-17 2015-01-17 Panneau décoratif composite bois-plastique et son procédé de fabrication

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