70 results about "Wood-plastic composite" patented technology

The invention provides a process optimization method for continuous extrusion molding of a wood-plastic composite material, and belongs to the technical field of wood-plastic composite material molding processes. A sectional type temperature control system is established, an extruder charging barrel is divided into four independent temperature control areas, the targeted optimal target temperature is set, a double-layer game model is constructed to achieve collaborative optimization of temperature stability and energy consumption, and parameter iteration adjustment is conducted through an intelligent multi-parameter monitoring platform according to a temperature uniformity index. And finally, online quality detection is carried out on the extruded product, so that the technical problems that wood fibers are easily subjected to thermal degradation at high temperature, a plastic matrix can be fully fused at enough high temperature, a processing temperature window of the wood fibers and the plastic matrix is very narrow, local overheating is easily caused, and the performance of a wood-plastic composite finished product is insufficient are solved.

The invention provides an automotive bacteriostatic polypropylene-based wood-plastic composite material and a preparation method thereof, the automotive bacteriostatic wood-plastic composite material comprises the following raw materials by mass: 90 parts of a polypropylene matrix, 20-40 parts of modified plant fiber, 5-20 parts of an inorganic filler, 1-3 parts of a lubricant, and 0.1-2 parts of an antioxidant; the modified plant fiber comprises plant fiber grafted with a graft polymer and loaded with a pyridine antibacterial agent, and the graft polymer comprises a polyunsaturated carboxylic acid chain segment and a polypropylene chain segment. The modified plant fiber has good compatibility with a polypropylene matrix and can be used for preparing a wood-plastic composite material, so that the mechanical property, the interface stability and the long-term antibacterial property of the composite material are remarkably improved.

A bamboo-based wood-plastic composite material manufacturing process has the following steps: S1, a bamboo processing step; S2, a bamboo core pretreatment step; S3, a wood-plastic composite material raw material preparation step; S4, a wood-plastic composite material hot processing step; S5, a bamboo blank processing step; S6, a wood-plastic composite material blank covering bamboo blank step; S7, a cooling and shaping step. The present application solves the problems of high density, high cost, brittleness and insufficient toughness of the existing wood-plastic composite material based on thermoplastic polymer, realizes the use of bamboo instead of plastic and solves the problem of recycling of waste plastic which is difficult to reuse. The present application can overcome the shortcomings of the prior art, be used for preparing a more practical and durable wood-plastic composite material which still has good mechanical properties after heating and forming. The present application also provides a product prepared by the bamboo-based wood-plastic composite material manufacturing process.

The application relates to the field of high polymer composite materials, and particularly discloses a high-strength and high-toughness wood-plastic composite material based on carboxyl-functionalized ionic liquid modified lignin and a preparation method thereof. The carboxyl-functionalized ionic liquid is covalently grafted with the phenolic hydroxyl group of lignin to form a chemical bond, and the long-chain structure of the carboxyl-functionalized ionic liquid forms physical entanglement at the interface of the wood-plastic composite material, so that the interface bonding strength is improved through the double effects, the tensile property and the bending property are significantly improved, the impact strength can be effectively restored or even improved through improved microwave-assisted homogeneous reaction parameters, and the dilemma of "strengthening and being brittle" is solved.

The invention discloses a green low-carbon wood-plastic composite material continuous production system and an energy consumption management method, and relates to the field of wood-plastic composite material production. The raw material pretreatment module is integrated with a wood powder precise drying device, a plastic recycling device and an auxiliary material proportioning device, and the water content and the recycling purity are controlled; the continuous mixing and plasticizing module adopts a conical double-screw extruder, multi-section temperature control, combined screws and double-layer heat preservation; the forming and shaping module comprises a self-adaptive runner mold, a gradient cooling system and an online detection device; the waste closed-loop utilization module collects dust under negative pressure, crushes leftover materials and modifies and recovers the leftover materials; the clean energy supply module is integrated with a photovoltaic system, a biomass gasification furnace, a ground source heat pump and an energy storage system; the intelligent energy consumption management and control module collects data in real time and optimizes energy consumption through an algorithm. According to the invention, the renewable energy utilization rate and the waste utilization rate are improved, the energy consumption and carbon emission are reduced, the product quality is guaranteed, green low-carbon continuous production is realized, and the industrial sustainable development is promoted.

The invention discloses a high-durability multifunctional composite material for landscape architecture and a preparation method of the high-durability multifunctional composite material, and relates to the technical field of outdoor wood composite materials. Thermoplastic, plant fibers, a hydrophobic agent, a compatilizer and a composite antioxidant are blended to prepare a hydrophobic modified wood-plastic composite material, and the hydrophobic modified wood-plastic composite material is used as a core layer; the preparation method comprises the following steps: blending a wood unit, a low-temperature sintered ceramic precursor, nano titanium dioxide and an inorganic binder to prepare a photocatalyst-loaded microporous ceramic-wood composite material, and forming a functional surface layer of the photocatalyst-loaded microporous ceramic-wood composite material; according to the high-durability multifunctional composite material for the landscape architecture, synchronous co-extrusion is utilized, the surface of the core layer is coated with the functional surface layer, curing and shaping are conducted, and the high-durability multifunctional composite material for the landscape architecture is obtained and is a novel landscape material which integrates high durability, long service life, low maintenance, environment friendliness and aesthetic value and can actively keep the surface clean.

This invention proposes a flat corner protector assembly and packaging process for WPC wall panels, relating to the field of decorative panel packaging. The flat corner protector assembly is a straight strip structure with a thickness of 3mm and a height of 20mm. Its length matches the side length of the WPC wall panel, and it is made of wood-plastic composite material. The height is equal to the sum of the thicknesses of two WPC wall panels and a 2mm thick pearl cotton cushioning layer. The process includes: stacking two 9mm thick WPC wall panels face-to-face, with a 2mm thick pearl cotton cushioning layer between them to form an assembly with a total height of 20mm; attaching the two flat corner protector assemblies to the left and right sides of the assembly, with their height flush with the total height of the assembly; wrapping the entire assembly with EB corrugated paper and reinforcing it with stretch film to form a single package unit; and neatly stacking multiple single package units on a pallet. This application can accurately adapt to a 20mm assembly height, possesses moisture-proof and mildew-proof properties, and has sufficient rigidity, significantly reducing storage and transportation losses.

The invention provides a durable water-resistant low-cost guardrail wood-plastic composite material and a preparation method thereof, and belongs to the technical field of wood-plastic materials. The composite material is mainly formed by the low-cost wood-plastic core material and the complete wrapping coating, the plastic content in the core material formula is low, and the cost is low; and the coating layer is composed of a thermoplastic inner layer coating layer and a thermosetting outer layer coating layer. The content of polyethylene in the core material of the product is reduced, the use amount of wood flour is increased, and the effect of reducing the cost is achieved. Meanwhile, the inner layer adopts a special low-viscosity thermoplastic coating, the surface wetting and permeability of the wood-plastic core material are good, the finally formed inner layer coating is compact and complete, and on the basis of the inner layer coating, the thermosetting coating prepared by virtue of special modified resin and active diluting components is relatively good in toughness and water resistance after being cured and molded, so that the service life of the wood-plastic core material is prolonged. The mechanical property is excellent, and the static bending intensity performance of a final product is also obviously improved.

The invention relates to the technical field of wood-plastic composite materials, and discloses a preparation method of a molded wood-plastic composite material. According to the invention, dibenzoyl peroxide is used as an initiator, 4-glycidyl ether styrene phosphate is subjected to a polymerization reaction to obtain a flame-retardant polymer, and then the flame-retardant polymer is mixed with polystyrene, wood flour and an antioxidant to obtain the molded wood-plastic composite material with synchronously improved mechanical properties and flame retardancy. The flame-retardant polymer disclosed by the invention contains a polystyrene molecular chain and an epoxy group, and can be used as a compatilizer, so that the compatibility between polystyrene and wood flour is improved, and the mechanical properties such as tensile strength of a composite material are obviously improved. The flame-retardant polymer also contains a phosphate group, so that the combustion char-forming capability of polystyrene is improved, and the wood-plastic composite material has relatively high limit oxygen index and flame-retardant property.

The invention discloses a preparation method of an amino acid metal ion complex surface modified ammonium polyphosphate flame retardant, and the method comprises the following steps: generating an amino acid metal ion complex from amino acid and metal salt through chelation, and carrying out ion exchange reaction between the amino acid metal ion complex and ammonium polyphosphate to obtain the surface modified ammonium polyphosphate flame retardant. After the amino acid metal ion complex surface modified ammonium polyphosphate flame retardant and a wood-plastic composite material are subjected to melt blending, the flame retardance, smoke suppression, mechanical property and ultraviolet aging resistance of the composite material can be remarkably improved; the method is cheap in raw materials, simple and environment-friendly in process and suitable for industrial production.

The invention relates to the technical field of wood-plastic composite materials, and particularly discloses a special composite lubricant for PE and PP wood-plastic and a preparation method thereof, the special composite lubricant comprises the following components: EVA solid waste oligomer, polyethylene wax, pentaerythritol stearate, inorganic filler, alkyl quaternary ammonium salt and short-chain fatty acid ester; a residual coordination catalyst in an EVA solid waste oligomer is activated by alkyl quaternary ammonium salt under a heating condition, in-situ polymerization / grafting reaction is carried out through catalysis, nitrogen-containing polar chain segments are directionally introduced, hydroxyl sites are introduced through chain transfer reaction, and the like, so that the dispersity of the fiber is improved, and the interface adhesion is enhanced; by adding the modified polyethylene wax, the short-chain fatty acid ester and the pentaerythritol stearate, friction in a melt can be synergistically adjusted, interface layering can be reduced, the modified polyethylene wax can improve the dispersing performance of the wood flour, and the flame retardance of the wood flour can be improved. The prepared composite lubricant can be compatible with wood flour and PE resin, and is high in stability.

The application discloses modified magnetic wood powder and a preparation process thereof, and is prepared by loading ferroferric oxide particles on the surface of wood powder through in-situ synthesis and combining with modification treatment. The modified magnetic wood powder has good dispersibility in water, can effectively adsorb micro-nano plastic particles in a solution, and can be removed from the solution by using a magnet. The modified magnetic wood powder adsorbed with the micro-nano plastic particles is subjected to hot-pressing forming to prepare functional wood-plastic composite materials with excellent physical and mechanical properties, magnetism, electromagnetic wave absorption and flame retardancy, and realizes the reuse of the magnetic particle materials after adsorbing the micro-nano plastic particles. The application can effectively adsorb and remove micro-nano plastics in water, and simultaneously realizes the high-value utilization of the adsorbed materials, has the advantages of simple operation, low cost and sustainability, and solves the problems of micro-plastic pollution treatment and the reuse of the treated materials.

The utility model discloses a multi-buckle sealing type wood-coated plastic composite window, and relates to the technical field of building doors and windows. A first buckle is installed on the back face of the window frame decoration strip and clamped in a clamping groove of the window frame body profile, a second buckle is installed on the back face of the window sash decoration strip and clamped in a clamping groove of the window sash body profile, and the window sash decoration strip and the window frame decoration strip are sealed through a sealing strip body. The plastic steel window solves the problem that an indoor decorative surface of a traditional plastic steel window is single, achieves the normal indoor effect of a wood window or other effects, has the wood window and other decorative effects while having high cost performance of the plastic steel window, and meanwhile solves the problem that an indoor wood frame / sash decorative profile is damaged and replaced; indoor decoration of the plastic steel window is achieved through the window frame decoration strip and the window sash decoration strip, meanwhile, rapid installation and later disassembly and replacement are achieved in a buckling mode, the circumferential sealing process between the window frame decoration strip and the window sash decoration strip is achieved through the sealing strip body, and it is ensured that the circumferential sealing performance formed by the composite structure is stable and durable.

This wood composite material comprises: an inner layer that includes wood and resin; an obverse layer provided on the obverse surface of the inner layer, the obverse layer including wood and resin; and a reverse layer provided on the reverse surface of the inner layer, the reverse layer including wood and resin. The total of the filling rate of the obverse layer and the filling rate of the reverse layer is no greater than half the filling rate of the wood overall.

The application discloses a kind of full biodegradable straw-plastic composite material and preparation method thereof.Full biodegradable straw-plastic composite material is composed of the following components by mass percentage: straw fiber 80-95% carbon dioxide-based polyester-polycarbonate staple fiber (PPC-P) 5-20%.The application finds through a large number of experiments that because there is physical cross between straw fiber and PPC-P fiber, so processing does not need to add compatilizer and coupling agent, and the use amount of PPC-P fiber can be greatly reduced, only 5%-20% of the use amount, thereby greatly reducing the cost of wood-plastic composite material.The resin used in the application is degradable carbon dioxide-based-polycarbonate, so that the composite material has full biodegradability.Carbon dioxide-based-polycarbonate is prepared from carbon dioxide, and the application reduces carbon dioxide emission.

The invention relates to the technical field of polymer composite materials, and discloses a preparation method of a waste plastic fiber reinforced wood-plastic composite material. According to the invention, 30-70% by weight of waste polyolefin, 10-50% by weight of wood flour, 5-30% by weight of waste PET fiber, 1-10% by weight of an epoxy functionalized elastomer and 0.05-1% by weight of a dynamic rearrangement catalyst are blended. Extruding at a specific thermodynamic window of 185-210 DEG C, and carrying out ring-opening addition on a high-concentration end group generated by degradation of the waste PET and an elastomer, so as to construct a confined dynamic covalent bond network at a multi-phase interface. The network is dynamically exchanged at the temperature higher than the topological freezing transition temperature, and good melt flowability is maintained; after cooling, rigid-flexible-rigid chemical anchoring is formed, and matrix crystallization is not interfered. The performance of conventional physical blending is improved, and the prepared composite material has good creep resistance and notch impact toughness and can be applied to the fields of high-bearing outdoor building materials, automobile anti-collision accessories and the like.

The invention belongs to the technical field of wood-plastic composite materials, and discloses a processing and manufacturing method for a natural eucommia ulmoides wood-plastic composite material, and the processing and manufacturing method comprises the following specific steps: step 1, raw material pretreatment and bark treatment: manually stripping outer rough skin of collected eucommia ulmoides bark; colloid inside the eucommia ulmoides fibers is stimulated by microwaves to migrate, a uniform adhesive film is formed on the surfaces of the eucommia ulmoides fibers, and the interface bonding strength of the fibers and a plastic matrix and the thermal stability of the material are remarkably improved by combining directional bonding of a silane coupling agent and a nano silicon dioxide function modification technology; a three-section gradient temperature control blending process is adopted to synchronously realize full infiltration of a molten-state matrix on fibers and uniform loading of active components, so that the problems of fiber agglomeration and thermosensitive substance decomposition in a traditional process are effectively inhibited, and the composite material has excellent tensile strength and impact resistance on the basis of maintaining excellent tensile strength and impact resistance. The biological activity functions of slow release, antibiosis, weather resistance, aging resistance and the like are realized.

The present application relates to the technical field of wood-plastic composite materials, and discloses a preparation method of a molded wood-plastic composite material. In the present application, 4-glycidyl ether styrene phosphate is subjected to a polymerization reaction to obtain a flame-retardant polymer by using diphenyl benzene peroxide as an initiator, and then the flame-retardant polymer is mixed with polystyrene, wood powder and an antioxidant to obtain a molded wood-plastic composite material with synchronous improvement in mechanical properties and flame-retardant properties. The flame-retardant polymer contains polystyrene molecular chains and epoxy groups, and can be used as a compatibilizer to improve the compatibility between polystyrene and wood powder, so that the mechanical properties such as tensile strength of the composite material are obviously improved. The flame-retardant polymer also contains phosphate groups, which improves the carbonization capacity of polystyrene during combustion, so that the wood-plastic composite material has a high limiting oxygen index and flame-retardant properties.

The utility model provides a raw material drying device for a wood-plastic composite material, which relates to the technical field of wood-plastic composite material processing, and comprises a support seat, an electric heating module, a drying groove, a discharge port, a baffle plate, a door plate, a mounting frame, an electric push rod, a placing table, a motor, a sealing cover, a blanking port, a hopper, an exhaust hole and a material pushing unit, each material pushing unit comprises two material guiding blocks, a cross rod is arranged between the two material guiding blocks, a plurality of material turning plates are arranged on the cross rod at intervals, the lower ends of the material turning plates make contact with the bottom of the drying groove, and the material turning plates in every two adjacent material pushing units are arranged in a staggered mode. And through continuous rotation of a material guide block and a material turning plate, the wood filler can be evenly laid in the drying groove and can be continuously turned and stirred in the drying groove, so that the drying efficiency of the wood filler is improved, coking of the wood filler is avoided, and the use effect is good.

The application provides a vehicle bacteriostatic polypropylene-based wood-plastic composite material and a preparation method. The vehicle bacteriostatic wood-plastic composite material comprises the following raw materials in parts by mass: 90 parts by mass of a polypropylene matrix, 20-40 parts by mass of modified plant fibers, 5-20 parts by mass of inorganic fillers, 1-3 parts by mass of a lubricant, and 0.1-2 parts by mass of an antioxidant. The modified plant fibers comprise plant fibers grafted with a grafting polymer and loaded with a pyridine antibacterial agent, and the grafting polymer comprises a polyunsaturated carboxylic acid segment and a polypropylene segment. The modified plant fibers have good compatibility with the polypropylene matrix and can be used to prepare wood-plastic composite materials, so that the mechanical properties, interface stability and long-term antibacterial properties of the composite materials are significantly improved.

The invention relates to the technical field of wood-plastic composite materials, in particular to a high-strength flame-retardant wood-plastic composite material and a preparation method thereof. The high-strength flame-retardant wood-plastic composite material is prepared from the following raw materials: 30 to 50 parts of wood fiber, 100 parts of polymer matrix, 15 to 25 parts of ammonium polyphosphate modified basalt fiber, 5 to 8 parts of compatilizer and 0.5 to 1.5 parts of flow aid. The preparation method comprises the following steps: S1, immersing basalt fibers into dilute acid for pre-activation, then washing to be neutral, and drying to obtain activated basalt fibers; s2, adding the activated basalt fiber into an alcoholic solution of a coupling agent for soaking, and then filtering and drying to obtain surface modified basalt fiber; and S3, heating and blending the surface modified basalt fiber and ammonium polyphosphate, and cooling to obtain the composite material. The high-strength flame-retardant wood-plastic composite material disclosed by the invention is high in mechanical strength and good in flame retardant property, the adopted raw materials are green and non-toxic, the preparation method is simple, the manufacturing cost is low, and the high-strength flame-retardant wood-plastic composite material can be used as a novel environment-friendly furniture material.

The invention discloses a high-strength flame-retardant lightweight wood-plastic composite material and a preparation method thereof. The composite material is prepared from the following components in parts by weight: 40-70 parts of PVC (polyvinyl chloride), 0-15 parts of calcium powder, 20-55 parts of a wood powder-based flame retardant, 1-5 parts of zinc hydroxystannate, 3-10 parts of a stabilizer, 0.3-1 part of PE (polyethylene) wax, 0.3-1 part of a high-temperature internal lubricant G60 and 4.5-8.5 parts of a flexibilizer HL100. The UL-94 flame retardant grade of the wood-plastic composite material can reach V-0 grade, the bending strength can reach 30-60 MPa, the tensile strength can reach 35-70 MPa, the density can reach 0.8-1.0 g / cm < 3 >, and the wood-plastic composite material has the advantages of simple process, environmental protection and wide application prospect, and is suitable for the fields of building templates, outdoor floors, fireproof doors and windows and the like with high requirements on mechanical properties and fireproof safety.

The invention relates to the field of wood-plastic composite materials, in particular to an automotive PP-based wood-plastic composite material based on a regenerated PP material and a preparation method of the automotive PP-based wood-plastic composite material. The composite material comprises the following substances in parts by weight: 15-30 parts of wood flour; 10 to 20 parts of CaCO3; 0.3 to 1.0 part of a lubricant; 0.1 to 0.8 part of an antioxidant; 0.5 to 1.0 part of an antibacterial auxiliary agent; 40-60 parts of a PP reclaimed material; 3-5 parts of a reinforcing modified material; the reinforcing modified material is magnetic particle coated carbon fiber. According to the invention, by compounding the wood flour, CaCO3, the PP reclaimed material and the reinforcing modified material containing the magnetic particle coated carbon fiber, a matrix-filling-reinforcing ternary composite system is formed. The magnetic particle coated carbon fiber reinforces a skeleton structure through interface stress transfer, and mechanical properties of the magnetic particle coated carbon fiber and rigid filling of CaCO3 are complementary, so that the tensile strength and bending rigidity of the composite material are effectively improved; the magnetic response characteristics of the magnetic particles are utilized to provide a basis for subsequent directional arrangement of a magnetic field.

The invention discloses a preparation method of a supercritical fluid microcellular foaming wood-plastic composite material, and belongs to the field of wood-plastic composite materials and manufacturing thereof. The invention aims to solve the problems of large cell size, low cell density, no more than 30wt.% of wood fiber content and unclear cell form regulation and control process control of a saturated filling foaming product in the existing wood-plastic composite material supercritical microcellular foaming injection molding technology. The method comprises the following steps: 1, preparing nucleating agent modified polymer granules; 2, preparing wood-plastic granules; and 3, preparing the microcellular foaming wood-plastic composite material. The method is used for preparing the supercritical fluid microcellular foaming wood-plastic composite material.

The invention discloses a preparation method of a foamed wood-plastic composite material, and relates to a preparation method of a foamed composite material. The problems that an existing traditional wood-plastic composite material is large in density and poor in heat insulation and sound absorption performance are solved. The method comprises the following steps: 1, fiber pretreatment; 2, high-speed mixing; 3, melting, extruding and pelletizing; 4, moisture content control; and 5, extruding and foaming. The preparation method is used for preparing the foamed wood-plastic composite material.

The invention belongs to the field of wood-plastic composite materials, and provides a wood-plastic composite board with a light core layer and a preparation method of the wood-plastic composite board. A three-layer composite structure design is adopted, a core layer material comprises PVC resin, a hollow core-shell structure composite filler, wood flour and other components, a surface layer material comprises PVC resin, fluorine-containing surface modifier modified aluminum oxide particles and other components, and the hollow core-shell structure composite filler is composed of hollow zinc oxide microspheres and a hydroxide shell layer wrapping the outer walls of the hollow zinc oxide microspheres. Fluorine-containing surface modifier modified aluminum oxide particles are prepared through treatment of modifiers such as perfluoroalkyl silane, a co-extrusion molding process is adopted in the preparation method, a core layer and a surface layer are extruded at 165-180 DEG C and 170-185 DEG C respectively, and the core layer and the surface layer are converged and molded in a co-extrusion die head at the temperature of 180-195 DEG C. According to the invention, excellent wear-resistant, hydrophobic, antibacterial, flame-retardant, heat-insulating and heat-preserving properties are realized, the problem that the existing wood-plastic composite board is insufficient in key properties is solved, and the wood-plastic composite board has wide application value.

The invention relates to the technical field of wood-plastic composite materials, in particular to an antibacterial wood-plastic composite material for furniture customization and a preparation method of the antibacterial wood-plastic composite material. The technical problems that an existing wood-plastic material is insufficient in antibacterial function intelligence, poor in durability and low in environmental protection safety, and performance and functions are difficult to consider at the same time are solved. According to the wood-plastic composite material disclosed by the invention, thermoplastic resin is used as a matrix, and a pretreated plant fiber reinforced material, an intelligent antibacterial microcapsule, a self-repairing microcapsule, a compatible reinforcing agent and a processing aid are added. The intelligent antibacterial microcapsule has humidity / pH dual response characteristics, and a capsule core contains a plant-derived antibacterial agent and nano-zinc oxide, so that on-demand bacteriostasis is realized; the capsule core of the self-repairing microcapsule is an epoxy silane oligomer repairing agent, the capsule wall is organic silicon resin formed by hydrolytic polycondensation, and the self-repairing microcapsule is healed when a material generates microcracks. The material disclosed by the invention shows excellent broad-spectrum lasting antibacterial property and self-healing ability while maintaining good mechanical properties, and is safe and environment-friendly.

Panel for wall or ceiling cladding or floor covering, comprising a carrier layer (10) of HDF or MDF, onto which a decorative layer of plastic is applied, wherein the decorative layer (16) consists of a PVC-free and polyolefinic material, in particular PP or PET, with a wear layer (18) covering the decorative layer (16), which consists of PET or a polyolefinic transparent polymer, and with a damping layer (14) between the decorative layer (16) and the carrier layer (10), wherein the damping layer (14) consists of a wood-plastic compound material, and with a counter-tension layer (12) consisting of cork or polymer foam.

This invention discloses a wood-plastic composite material and its preparation method. The preparation method includes: (1) heating and stirring DES liquid, plant fiber material and water, then adding water to stop the reaction and depositing lignin, then washing and drying to obtain a preliminary DES-treated plant fiber material; finally, heating and pulverizing the preliminary DES-treated plant fiber material to obtain a DES-treated plant fiber material; (2) modifying the DES-treated plant fiber material with a coupling agent to obtain a modified plant fiber material; (3) mixing the modified plant fiber material, polypropylene and maleic anhydride-grafted polypropylene evenly, then mixing and hot pressing to obtain a wood-plastic composite material. The method of this invention can significantly improve the interfacial compatibility between plant fibers and polymer matrix, and provide a superior platform for further coupling agent modification, ultimately synergistically improving the comprehensive mechanical properties and water resistance stability of the wood-plastic composite material.

The invention relates to the technical field of wood-plastic materials, and particularly discloses a wood-plastic composite material applying a glass fiber reinforced plastic powder difficult-to-recover material and a preparation method. The wood-plastic composite material comprises the following raw materials in parts by weight: 20-40 parts of polymer coated glass fiber reinforced plastic powder, 20-35 parts of a polyethylene material, 15-30 parts of a polypropylene material, 15-25 parts of wood flour, 3-8 parts of toughening fibers, 5-10 parts of polyethylene grafted maleic anhydride, 1-2 parts of a lubricant and 0.3-0.8 part of an antioxidant. By forming a multi-phase composite reinforced structure, when the material is stressed, the glass fiber reinforced plastic powder bears main stress, and the flexible fiber network inhibits crack propagation and absorbs impact energy. And the two are combined to realize the state of non-brittleness in rigidity and non-softness in toughness. Therefore, the problem that the mechanical property and durability of the wood-plastic material become poor due to the glass fiber reinforced plastic powder can be solved.