202 results about "Wood flour" patented technology

Provided are a water-resistant wood-plastic reinforced composite flooring and a manufacturing method therefor. Wood flour is boiled in boiling water for 3-4 hours, filtered and dried, to obtain dried wood flour; polypropylene, butyl acrylate, methyl methacrylate, maleic anhydride and dicumyl peroxide are mixed evenly, extruded and granulated, and dried to obtain a compatibilizer; the dried wood flour and polypropylene are mixed evenly, the compatibilizer is added and mixed evenly, then extrusion and granulation, and injection molded, are performed, to obtain a wood-plastic flooring blank; a composite resin emulsion and a photoinitiator are ultrasonically mixed evenly, and the wood-plastic flooring blank is immersed therein, then taken out and dried at room temperature, and then vacuum dried and UV cured, to obtain water-resistant wood-plastic reinforced composite flooring.

The invention provides a method for optimizing the mechanical property of a bio-based composite material based on nano modification, and belongs to the technical field of high-molecular compound compounds.The method includes the steps that wood flour is subjected to silane coupling agent modification pretreatment, a functionalized nano particle dispersion liquid is prepared, the dispersity is evaluated through a graph theory model, and the mechanical property of the bio-based composite material is optimized. The modified wood flour and polyethylene are subjected to melt blending in a twin-screw extruder in proportion, the functionalized nanoparticle dispersion liquid is synchronously added, real-time regulation and control are performed by using an intelligent dispersion optimization model, and the network structure integrity is evaluated through gridding performance indexes. The tensile strength, the bending strength and the impact strength are comprehensively optimized by adopting a multi-objective optimization game model, the process parameters such as the nano-particle addition amount, the mixing temperature and the mixing time are adjusted according to the optimization result, and the optimization is repeated until the preset target values are reached, so that the problems that the nano-particles are non-uniformly dispersed, local stress concentration points are formed, and the stability of the nano-particles is improved are solved. The overall mechanical property is influenced.

The invention discloses a high-weatherability sound insulation wood plastic wallboard and a preparation method thereof, the high-weatherability sound insulation wood plastic wallboard comprises the following raw materials by weight: 30-40 parts of wood flour or plant fiber, 25-35 parts of a sound insulation functional filler, 35-45 parts of high density polyethylene, 2-2.5 parts of maleic anhydride grafted high density polyethylene, 1-1.5 parts of stearic acid, 3-4.5 parts of a weatherability auxiliary agent, and 1-1.5 parts of azodicarbonamide. The problems of cracking, deformation and the like caused by moisture absorption expansion are relieved by optimizing the proportion and compatibility of the wood flour and the plastic, and then the problems of weather resistance and sound insulation of the wallboard outdoors are solved by filling the porous sound absorption material.

The utility model discloses a plastic wood product production system device which comprises a main material storage and conveying area, an auxiliary material feeding and weighing area and at least one mixed material conveying, extruding and feeding area. A CaCO3 main material storage and conveying unit, a CaCO3 transition unit, two groups of PVC main material storage and conveying units and a wood powder main material storage and conveying unit are arranged in the main material storage and conveying area; a group of auxiliary material pouring bin dedusting and weighing units are arranged in the auxiliary material feeding and weighing area; a mixing unit, a mixture conveying unit and a mixture storage and extrusion feeding unit are arranged in the mixture conveying, extruding and feeding area. The device has the advantages of being efficient in operation, high in weighing precision, good in mixing effect, remarkable in energy conservation, environmentally friendly, high in automation degree and the like.

The invention relates to the technical field of saline-alkali land improvement, and particularly discloses a saline-alkali land soil conditioner preparation process capable of preventing salt and alkali return, which comprises the following steps: (1) uniformly mixing vinegar residue powder, zeolite powder and molasses aqueous solution, granulating, adding wood flour into the obtained particles for coating, separating out the particles after coating, and drying to obtain dried particles; and obtaining the core for later use. (2) uniformly mixing the calcium silicate or pseudo-wollastonite powder, zeolite powder and desulfurized gypsum powder, adding water, and uniformly stirring to form slurry; and coating the surface of the inner core with the slurry, and drying to obtain the modifier. The modifier prepared by the process disclosed by the invention not only can reduce the alkali content in the saline alkali soil and improve the microbial environment of the soil, but also can prevent the absorbed salt from returning to the soil to cause alkali and salt return, so that the improvement effect is more lasting.

The invention discloses a wood-plastic composite anti-collision plate and a preparation method thereof.The wood-plastic composite anti-collision plate is mainly composed of PVC resin, thermoplastic polyurethane, PVC-g-MAH, nano calcium carbonate, wood flour, a microencapsulation self-repairing agent and the like, and the wood-plastic composite anti-collision plate prepared based on the formula and the preparation technology has the three advantages of being light in weight, high in impact resistance and resistant to damp and heat; the application scene range of the anti-collision plate is widened, the practicability and environmental adaptability of products are effectively improved through performance optimization, and a more competitive solution is provided for the multi-scene protection requirement.

The invention relates to the technical field of fireproof polymer composite materials, in particular to a fireproof composite material for a fireproof door and a preparation method of the fireproof composite material. A fireproof composite material for a fireproof door is prepared from the following raw materials in parts by mass: 55-60 parts of polyvinyl chloride, 15-20 parts of a flame retardant, 40-50 parts of wood flour, 120-130 parts of modified sepiolite mineral powder, 26-32 parts of reinforced fibers, 2.5-3 parts of a coupling agent, 5-6 parts of a foaming agent, 1-1.3 parts of a lubricant and 3-3.5 parts of a toughening agent. According to the fireproof composite material for the fireproof door, a four-effect synergistic system of smoke suppression, charring, oxygen isolation and heat conduction is constructed through three major technologies of'alkali-silane-organic 'triple modification of sepiolite, 'diamino coupling-nitrogen and phosphorus grafting' modification of alumina fibers and'interface coating 'coating modification of cyclotriphosphazene-silicon nitride; the flame retardant property and the mechanical property of the fireproof composite material are obviously improved.

The invention discloses easy-to-ignite Buddhist incense which comprises an incense rod and an incense body, the incense body covers the outer side of the incense rod, the top of the incense body is connected with an incense head, and the incense body comprises, by mass, 75%-90% of wood flour, 5%-25% of binder and 0.05%-5% of quick burning agent. The incense head comprises the following components in percentage by mass: 70-90% of flammable wood flour, 5-25% of a binder and 0.05-8% of a quick-burning agent, the quick-burning agent is sodium nitrate, the binder is incense making rubber powder, the top of the incense head is provided with raised characters or patterns, the outer side of the incense body is provided with raised patterns or characters, and the outer side of the incense body is provided with raised patterns or characters. The cross section of the incense head is smaller than that of the incense body, the incense body is cylindrical, and a decorative layer is arranged on the outer surface of the incense body. The Buddhist incense is simple in structure, the incense head is easily and rapidly ignited, then the incense body is ignited by the incense head, Buddhist incense is easily and rapidly ignited, ignition time is short, the product is attractive, and consumer experience is good.

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 flame-retardant PVC (polyvinyl chloride) wood-plastic plate which is prepared from the following raw materials in parts by weight: 100 parts of SG-7 type PVC resin; 20-30 parts of modified wood powder; the composite flame retardant is composed of ammonium polyphosphate, aluminum hydroxide, molybdenum trioxide and zinc borate according to the weight ratio of 15: 20: 16: 4; the mass ratio of the aluminum-titanium composite coupling agent to the wood flour is 1: 100; 5-8 parts of a calcium-zinc stabilizer; the lubricant is composed of polyethylene wax, paraffin and calcium stearate according to the weight ratio of 1: 1: 1; and 5-10 parts of an acetyl butyl citrate plasticizer. The invention relates to the technical field of polymer composite materials, in particular to a flame-retardant PVC wood-plastic plate and a preparation method thereof.The flame-retardant PVC wood-plastic plate and the preparation method thereof have the remarkable advantages that due to a composite flame retardant, the oxygen index of the plate reaches 32.1%, the combustion performance reaches the UL94V-0 level, and the smoke density is reduced by 72.1%; the tensile strength, the impact strength and the bending strength are respectively improved by 339.6%, 59.1% and 179.5% when the wood powder is treated by the aluminum-titanium coupling agent; the extrusion temperature of 150-175 DEG C and the screw rotating speed of 12-18 r / min are accurately controlled, the problems of wood powder carbonization and flame retardant decomposition are avoided, and the quality consistency is guaranteed.

The present invention discloses a composite sludge dewatering agent prepared from organic waste acid and its production system, which relates to the field of dewatering agent production. In terms of parts by weight, the raw material composition of the composite sludge dewatering agent prepared from organic waste acid includes: 30-60 parts of diethylenetriamine, 60-180 parts of concentrated hydrochloric acid, an appropriate amount of absolute ethanol, 75-125 parts of epichlorohydrin, 100-200 parts of wood powder, 50-100 parts of sodium hydroxide, 30-50 parts of cationic polyacrylamide, 50-100 parts of natural bamboo charcoal particles, and an appropriate amount of pure water. When producing this dewatering agent, the overall equipment is controlled through an operating platform. After adding an appropriate amount of raw materials to the etherification unit, a water pump will extract the upper-layer etherifying agent and flow it into the alkalization unit, and the purification device will also adsorb the waste gas generated during etherification. Then, the alkalization unit will mix and stir some raw materials such as wood powder with the etherifying agent, and finally form a dewatering agent.

The invention relates to the technical field of sewage treatment, in particular to a biological enzyme-containing deodorizing and antibacterial composition for sewage treatment. The biological enzyme-containing deodorizing and antibacterial composition for sewage treatment is prepared from the following raw materials in parts by mass: 1 to 3 parts of a compound biological enzyme preparation, 5 to 15 parts of bamboo charcoal powder, 1 to 2 parts of chitosan, 1 to 3 parts of dopamine, 0.005 to 0.024 part of glutaraldehyde, 10 to 30 parts of bentonite, 1 to 5 parts of graphene, 1 to 3 parts of nano silicon dioxide, 10 to 20 parts of wood flour, 5 to 10 parts of sodium hydrogen sulfite and 1 to 5 parts of sodium carboxymethyl cellulose. 1-2 parts of polyacrylamide and 1-5 parts of a nonionic surfactant. The composition disclosed by the invention forms a synergistic effect, can remove most suspended matters and metal ions in sewage, can quickly catalyze and decompose organic matters into water-soluble small molecular compounds such as organic acid and alcohol, efficiently and remarkably reduces the contents of nitrogen and phosphorus in the sewage and purifies a water body.

The invention relates to the technical field of high polymer materials, and discloses a tough anti-knurling mud material and a preparation method thereof.The tough anti-knurling mud material is prepared by adding polyurethane, modified polyurethane, diatomaceous earth, wood flour and glycerin into a reactor, stirring and mixing to form uniform slurry, then adding a sodium bicarbonate foaming agent, rapidly stirring, injecting into a mold, and foaming to obtain the tough anti-knurling mud material. And then adding a cross-linking agent epichlorohydrin, and curing to obtain the tough anti-knurling mud material. The tough anti-knurling mud material disclosed by the invention has relatively good flame-retardant, antibacterial and stretch-proof effects.

The utility model relates to the technical field of wood processing, and discloses a dust collection device for a woodworking sliding table saw, which comprises a saw table and a dust collection component, a saw blade is arranged on the saw table, a supporting table is adjacently arranged on the outer side of the saw table, and the dust collection assembly is installed on the supporting table so that wood powder generated during saw blade operation can be adsorbed through the dust collection assembly. Compared with the prior art, the wood flour humidifying device has the following advantages and effects that when the saw bench is used for cutting, wind power is generated through the exhaust fan, wood flour can be sucked into the humidifying bin through the dust suction opening, wetted sponge can adsorb the wood flour so as to conduct dust removal treatment on the wood flour, meanwhile, the plate body can move through the rotating assembly and the synchronous block, and the wood flour can be humidified through the rotating assembly and the synchronous block. The sponge is driven to move, the contact area of the sponge and wood powder is increased, the wood powder adsorption treatment efficiency is improved, and meanwhile, the sponge can be conveniently washed subsequently for secondary use.

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 belongs to the technical field of diaphragma juglandis extraction, and particularly relates to a high-activity diaphragma juglandis aqueous extract as well as a preparation method and application thereof. The preparation method of the high-activity diaphragma juglandis aqueous extract comprises the step of crushing diaphragma juglandis to obtain diaphragma juglandis powder. And mixing the diaphragma juglandis powder and distilled water according to a mass ratio of 1: (10-30), carrying out subcritical extraction at 120-180 DEG C for 30-60 minutes, collecting extract liquor, and filtering to obtain the diaphragma juglandis aqueous extract. Wherein after the subcritical extraction is finished, stirring is kept, condensate water is introduced, the temperature of the extraction liquid is reduced to the room temperature, and then the extraction liquid is collected. The preparation method of the high-activity diaphragma juglandis aqueous extract provided by the invention has the advantages of no solvent residue, short extraction time and high biological activity of the extract.

The application discloses a kind of preservative mildew-proof aging-resistant wood board and preparation method thereof, comprising: multi-walled carbon nanotube is added to oxidizing agent solution, is mixed sufficiently, oxidation reaction is carried out, and is cleaned using detergent;Antibacterial preservative and emulsifier are added to organic solvent and uniformly mixed, add to chitosan aqueous solution, while keeping sufficient stirring, centrifugal, precipitate, dry, obtain antibacterial preservative microcapsule;Multi-walled carbon nanotube and carboxylic acid derivative are stirred, filter, dry, add antibacterial preservative microcapsule, stir, and uniformly mixed with multi-walled carbon nanotube;The mixture before, wood powder, binder, additive and water are added to stirring kettle and stirred, put into plate mold, and heat solidification;Pressing, effectively enhance the performance and durability of antibacterial preservative, also increase the service life of wood board.

The present invention relates to the technical field of wood-plastic composites, and provides a PVC wood-plastic material having strong smoke suppression and flame retardancy, and a preparation method therefor. The PVC wood-plastic material comprises the following components in parts by weight: 70-100 parts of a PVC resin, 20-30 parts of wood powder, 20-30 parts of calcium carbonate, 15-20 parts of a smoke suppression material, 10-15 parts of a flame retardant, 1-6 parts of a foaming agent, 5-10 parts of a stabilizer, 1-2 parts of a coupling agent, 5-10 parts of a processing aid, and 1-4 parts of a lubricant, wherein the smoke suppression material comprises a molybdenum compound, ferrocene and an oxalate dihydrate in a mass ratio of 1:(0.5-1.5):(5-10). The preparation method comprises the end-capping modification of the wood powder and the preparation of the PVC wood-plastic material. The prepared PVC wood-plastic material has excellent flame retardancy and smoke suppression properties.

The invention discloses a corrosion-resistant and mildew-proof wood-plastic floor and a processing method thereof, and relates to the technical field of wood-plastic floors, the processing method comprises the following steps: carrying out refined pretreatment on wood powder to obtain fine wood powder meeting the requirements of particle size and dryness; the method comprises the following steps: pretreating a plastic base material through recycled polyethylene plastic particles, removing impurities and adjusting the particle size of the particles; an epoxy functional mildew preventive is synthesized in situ and is used for forming covalent bonding with a wood-plastic matrix subsequently; mixing the pretreated plastic base material, the wood flour and the epoxy functional mildew preventive in sequence to obtain a uniform material; bonding and plasticizing of the materials are achieved through a reactive extrusion process, and a molten profile is formed; carrying out on-line shaping and gradient cooling on a molten profile obtained by reactive extrusion, eliminating internal stress, and carrying out curing molding; and fixed-length cutting and finish machining are conducted on the sectional material subjected to gradient cooling and curing, and the finished corrosion-resistant and mildew-proof wood-plastic floor is obtained.

A kind of wood grain polypropylene composite material, by weight parts, including the following components: high fluidity polypropylene 45 parts;Metallocene low isotacticity polypropylene 5-15 parts;Wood powder 10-50 parts;Maleic anhydride grafted polypropylene 0.5-5 parts;Amide lubricant 0.5-2 parts;Dimethyl silicone oil 0.5-1.5 parts.The wood powder dispersion effect in the polypropylene composite material of the application is very good, so that the wood grain polypropylene composite material of the application has the advantages of wood grain, high gloss.

A writing instrument part that improves the releasability of a core pin is provided. In a writing instrument part by the insert molding method in which a wooden barrel material made of natural wood flour and a water-soluble resin binder is injected into a mold, the wooden barrel material and a core pin having a paper straw inserted therein are integrated, and a two-layer structure having a paper straw layer as an inner layer and a wooden barrel layer as an outer layer is formed.

The application relates to the technical field of processing and preparation of wood-based functional materials, and particularly discloses a wood-based friction material with a service life self-monitoring function and a preparation method thereof, which comprises the following steps: dispersing poplar powder in a co-solvent formed by mixing choline chloride and dihydroxide oxalic acid to obtain a mixed liquid, diluting and washing with water to obtain filter residue A; dispersing the filter residue A in distilled water I, adding sodium chlorite and acetic acid, stirring, and washing with water to obtain filter residue B; dispersing the filter residue B in distilled water II, adding phenolphthalein, and crushing to obtain a dispersion liquid; adding sodium chloride, solid Tris and tannic acid into the dispersion liquid, stirring, and washing with water to obtain filter residue C; dispersing the filter residue C in distilled water III, adding polyvinyl alcohol, stirring, pouring into a mold, and drying; dispersing the filter residue A in distilled water, adding sodium hydroxide and polyvinyl alcohol, stirring to obtain a mixed base liquid, continuously pouring into the mold, and drying to obtain the wood-based friction material. The friction material has the service life self-monitoring function, and the method is simple and low in cost.

The utility model relates to the technical field of wood powder production, and discloses a batch feeding device of a pulverizer for wood powder production, which comprises a frame, a conveyor belt and a bottom frame, the bottom frame is arranged on one side of a discharge end of the frame, a U-shaped frame is mounted on the bottom frame, a tray for receiving wood is mounted on the U-shaped frame, and the conveyor belt is arranged on the bottom frame. A pair of fixing rods is symmetrically installed at the front end of the n-shaped frame, a fixed rod is installed between the pair of fixing rods, the tray is rotationally connected with the fixed rod through a connecting lug, a first air cylinder is installed at the tail end of the n-shaped frame, the first air cylinder is supported at the tail end of the tray through a supporting frame, and the first air cylinder is hinged to the supporting frame and the n-shaped frame. The tray is arranged to contain transverse wood falling off from the conveying belt, then the tail of the wood is lifted under driving of the first air cylinder, the wood can be vertically poured and discharged, crushing operation of the wood is more convenient, limitation to the length of the wood is relieved, and the adaptability is higher when the wood crushing device is used in cooperation with a crusher.

The invention discloses a composite imitation light ore raw material and a preparation method thereof, and aims to solve the problems of high density, low whiteness, low porosity, high energy consumption, high cost and the like of natural ore. The raw materials comprise, by mass, 40-60% of calcined kaolin, 20-30% of diatomaceous earth, 15-25% of wood flour and 1-3% of a dispersant, and are prepared through mixing, vacuum extrusion, segmented sintering, crushing and screening. The product is irregular particles of 2-8 mm, the true density is 0.4-0.6 g / cm < 3 >, the whiteness is 90% or above, the aperture ratio exceeds 85%, and the compressive strength is 25 + / -3 MPa. The method omits a crushing and purifying process, reduces the cost by 22%, has light weight, high whiteness and high adsorbability, and is suitable for the fields of building, environmental protection and the like.

The invention relates to the technical field of wood-plastic materials, and particularly discloses a high-strength and high-span three-layer co-extrusion wood-plastic floor and a preparation method. The co-extrusion wood-plastic floor comprises a surface layer, a core layer and a middle layer, the middle layer wraps the core layer, the surface layer wraps the middle layer, and the surface layer is a polyethylene material layer; the core layer is prepared from 35 to 45 parts of a polyethylene material, 35 to 50 parts of an ABS (Acrylonitrile Butadiene Styrene) material, 22 to 28 parts of wood flour, 20 to 35 parts of a recycled waste fiber material, 1.2 to 1.8 parts of zinc stearate and 1.2 to 1.8 parts of a titanate coupling agent; the middle layer is prepared from 70 to 85 parts of a polyethylene material, 30 to 50 parts of an ABS (Acrylonitrile Butadiene Styrene) material, 20 to 35 parts of a recycled waste fiber material, 1.2 to 1.8 parts of a titanate coupling agent and 1.2 to 1.8 parts of zinc stearate. According to the wood-plastic floor, the mechanical property of the wood-plastic floor in a high-span use scene can be improved, and the production cost is reduced.

The utility model discloses a wooden floor processing grinding and polishing machine which comprises a grinding and polishing shell, supporting plates are arranged at the front end and the rear end of the interior of the grinding and polishing shell, a wooden floor conveying belt is arranged between the two supporting plates, grinding and polishing rollers are arranged at the upper end of the interior of the grinding and polishing shell respectively, and the wooden floor processing grinding and polishing machine further comprises a wood chip collecting mechanism. And the wood chip collecting mechanism comprises dust collecting covers, dust suction pipes and brushing rollers, the dust collecting covers are arranged between the upper surfaces of the two supporting plates correspondingly, and the grinding and polishing rollers are rotationally connected between the front inner walls and the rear inner walls of the dust collecting covers through first rotating shafts correspondingly. According to the wood flour collecting device, wood flour generated during grinding and polishing of the wood floor is collected in a centralized and multi-directional mode, compared with a single dust collection mode, diffusion of the wood flour to the outside can be reduced, wood flour collection is more comprehensive, residues of the wood flour on the surface of the wood floor are reduced, follow-up machining is facilitated, and the quality of the wood floor machining environment is improved.

The invention relates to a preparation method of lignin-based multi-dimensional interpenetrating network modified wood powder and application of the lignin-based multi-dimensional interpenetrating network modified wood powder in synthetic leather. Lignin, nano barium sulfate, a silane coupling agent and wood powder are subjected to low-temperature reaction in an acid environment to form an organic-inorganic hybrid interpenetrating network, and the modified wood powder rich in active functional groups such as hydroxyl and the like is prepared; then, the modified wood powder is used as a framework material and is cross-linked with polyurethane to form a multi-dimensional interpenetrating network structure, the synthetic leather with a dislocation entanglement and mechanical interlocking structure is prepared, and the tensile strength, the elongation at break, the flexibility, the hydrolysis resistance, the wear resistance and other properties of the synthetic leather are enhanced.

The invention relates to the technical field of plastic-wood material production, in particular to a plastic-wood material production feeding device which comprises a feeding device body and further comprises a rotating assembly, a discharging box is fixedly connected to the top in the feeding device body, a feeding mechanism is arranged on the right side of the feeding device body, and the rotating assembly comprises a driving motor. According to the device, when self vibration of the vibration screening basket is not enough to crush the cakes, the device directly extrudes and crushes the small cakes at the bottom of the screening basket through the rubber extrusion roller, and meanwhile, the rubber extrusion roller is made of an elastic material and can partially fill filter holes of the vibration screening basket in the extrusion process, so that blockage is prevented; the detention of caked particles at the bottom of the screening basket is obviously reduced, smooth discharging of wood flour is ensured, production interruption or maintenance requirements caused by blockage are avoided, meanwhile, the deformation capacity of the elastic material allows the rollers to be filled in the filter holes in a self-adaptive mode, the caked particles are broken, the screen holes are not blocked, and the screening efficiency is improved.

The invention discloses a flame-retardant wood-plastic plate and a preparation method thereof, and relates to the technical field of wood-plastic plates. The flame-retardant wood-plastic plate prepared by the invention comprises modified polyethylene and modified wood flour, and the modified polyethylene is obtained by grafting a functional monomer to polyethylene and then reacting with phosphorus pentoxide; the modified wood flour is obtained by wrapping wood flour with polyether amine and then reacting with o-tolyl biguanide, and the prepared flame-retardant wood-plastic plate has good flame-retardant, antibacterial and anti-aging properties.

The invention belongs to the field of wood-plastic composite materials, and discloses a flame-retardant wood-plastic composite material which comprises the following raw materials: wood flour, a plastic matrix, modified aluminum hydroxide, modified magnesium hydroxide, a flame retardant, a coupling agent, a lubricant and an antioxidant. According to the flame-retardant wood-plastic composite material disclosed by some examples of the invention, by optimizing a flame retardant compounding system and a surface modification process, the flame-retardant properties are as follows: the oxygen index is greater than or equal to 32%, and the UL-94 vertical combustion reaches V-0 level; mechanical properties are as follows: the bending strength is greater than or equal to 28MPa, and the tensile strength is greater than or equal to 18MPa; the durability is as follows: the water absorption is lt; and the turnover frequency of the building template is more than or equal to 15 (the turnover frequency of the traditional WPC template is less than or equal to 8). The flame retardant property and the mechanical property are synergistically improved, meanwhile, the production cost is reduced, and the method is suitable for large-scale application of building templates.