148 results about "Wood-plastic composite" patented technology

A nozzle embedded type 3D printing device for a thermosetting wood-plastic composite material belongs to the technical field of 3D printing, and comprises a rack, and an extrusion movement mechanism, a powder laying mechanism, a powder bed mechanism, a printing platform movement mechanism and a binder feeding system which are arranged on the rack, and the extrusion movement mechanism is fed through the feeding system. The printing efficiency of existing printing equipment can be improved, the manufacturing and maintenance cost of the existing equipment is reduced, the accuracy and consistency of a printing structure are ensured, and printing of a high-precision complex structure is achieved; the provided equipment combines the advantages of extrusion type printing equipment and a powder bed structure, the requirement of single extrusion printing for the formability of extruded materials is met, controllable printing of large-flow, high-viscosity and large-layer-thickness printing shapes and precision is achieved, the equipment is suitable for various types of binder materials, the variety and size range of powder bed materials is large, and the equipment is suitable for large-flow, high-viscosity and large-layer-thickness printing. And the rapid part forming machining requirements of wide material application range, large forming size and high part strength are met.

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 belongs to the field of flame-retardant materials, and particularly relates to a flame-retardant wood-plastic composite material and a preparation method thereof. Raw camphorwood powder is subjected to alkali treatment and hyperbranched silicon dioxide grafting treatment and then is subjected to melt blending with polypropylene, piperazine pyrophosphate and melamine phosphate, and the wood-plastic composite material with the intumescent flame-retardant effect is prepared. Limit oxygen index, vertical combustion, thermogravimetry, cone calorimetry and other tests show that the prepared wood-plastic composite material has excellent flame retardance, the limit oxygen index can reach 36.8%, the vertical combustion test reaches the V-0 grade, the total smoke release amount is reduced to 45.3% of that of raw materials, the flame retardance, smoke suppression and other performance are remarkably improved, and the wood-plastic composite material has good application potential.

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.

The utility model relates to a writing device with an erasable board, which comprises at least two panels, every two panels are integrally arranged and are made of the same PP (polypropylene) plastic or paper-plastic composite material or wood-plastic composite material or metal-plastic composite material; every two panels are oppositely folded through a folding ridge line, the thickness of the folding ridge line is smaller than that of each panel, the section of a folding ridge part formed between every two panels is an inverted trapezoidal groove or a U-shaped groove or a V-shaped groove, and folding is convenient. At least one erasable plane for writing is arranged on the panel; the device is simple in structure and processing technology and convenient to use; the folding structure is small in size and convenient to store and carry; the material is non-toxic, odorless, green and safe; writing is smooth, and erasing is traceless; different structures can be changed and combined to have the functions of a notebook computer, a note board, a table signboard, a writing base plate and the like, and under the clamping of the digital photographing recognition technology, the multifunctional notebook computer can be repeatedly used, and cost is saved.

The invention discloses a wood-plastic composite material for a laboratory fume hood and a preparation method thereof, and relates to the technical field of composite materials, and the wood-plastic composite material is prepared from the following raw materials in parts by weight: 30-40 parts of plant fiber powder, 40-50 parts of functional polycondensate, 20-30 parts of PBT resin, 10-20 parts of aromatic hyperbranched polyester, 1-2 parts of a coupling agent, 0.3-0.8 part of an antioxidant, 0.8-1.5 parts of a lubricant, and 1-2 parts of 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate. 1-2 parts of 2, 7-anthraquinone disulfonic acid and 1-3 parts of a catalyst A; the functional polycondensate comprises structural units introduced by the following monomers: 4, 6-hydroxy-2-cyanobenzothiazole, 2, 2-bis [4-(4-aminophenoxy) phenyl]-1, 1, 1, 3, 3, 3-hexafluoropropane and dimethyl biphenyl diisocyanate. The composite material is high in mechanical strength, sufficient in toughness and excellent in flame retardance and aging resistance.

The invention provides a strong smoke suppression flame retardant PVC wood-plastic material and a preparation method thereof, and relates to the technical field of wood-plastic composites, the PVC wood-plastic material comprises the following components by weight: 70-100 parts of PVC resin, 20-30 parts of wood flour, 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 oxalate dihydrate in a mass ratio of 1: (0.5-1.5): (5-10); the preparation method comprises the steps of wood powder end-capping modification and PVC wood-plastic material preparation. The PVC wood-plastic material prepared by the invention has excellent flame retardant property and smoke suppression property.

The invention discloses a production device for a wood-grain imitation co-extruded mixed-color wood-plastic composite material, comprising a first extrusion component, a component transition connector, a co-extrusion module, an embossing machine, a shaping table and a cutting machine. The co-extrusion module is provided with a second extrusion component and a wood-grain control component, and the wood-grain control component has a cylindrical gap. This production device effectively solves the problem that when the fabric and the masterbatch are added simultaneously, the masterbatch is excessively melted and easily disturbed by the fabric dissolution, resulting in an unsatisfactory or no imitation wood-grain effect, which is caused by unstable flow rate. At the same time, the amount of the masterbatch added is in a controllable state, and the imitation wood-grain produced is naturally in a controllable state. This invention is used in the field of wood-plastic composite material production.

The invention relates to the technical field of new materials, and discloses a functionalized lignin-polylactic acid wood-plastic composite material, which is prepared by introducing the obtained active hydroxyethyl group into lignin, and then under the action of an organic tin catalyst, taking toluene diisocynate tripolymer as a cross-linking agent to prepare the functionalized lignin-polylactic acid wood-plastic composite material. The preparation method comprises the following steps: carrying out an addition reaction on isocyanate groups, hydroxyethyl groups of lignin and hydroxyl groups of dodecyl dimethyl-2-hydroxy ammonium chloride respectively, chemically grafting long-chain alkyl quaternary ammonium salt into lignin to obtain antibacterial quaternary ammonium salt functionalized lignin, and blending the antibacterial quaternary ammonium salt functionalized lignin with polylactic acid to obtain the wood-plastic composite material. The lignin-grafted polylactic acid has excellent antibacterial property and antibacterial spectrum property, has a good antibacterial effect on streptococcus aureus, and has a good toughening effect on polylactic acid due to the fact that lignin-grafted long-chain alkyl is subjected to chain bond winding with polylactic acid molecular chains to form good molecular chain acting force.

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 present application discloses a low-precipitation environmentally friendly WPC wood-plastic floor lubricating material and a preparation method thereof. On the one hand, the present application provides a low-precipitation environmentally friendly WPC wood-plastic floor lubricating material, and the mass proportion of each raw material component of the lubricant includes: 20 to 28 parts of methyl methacrylate grafted polypropylene wax, 32 to 40 parts of MBS resin powder, 8 to 16 parts of chlorinated paraffin, 16 to 22 parts of TPP tritolyl phosphate, 4 to 10 parts of zinc borate, and 2 to 8 parts of silicone powder. On the other hand, the present application provides a preparation method for the above-mentioned low-precipitation environmentally friendly WPC wood-plastic floor lubricating material. The present application effectively improves the compatibility between wood components and polyvinyl chloride without any precipitation, and can comprehensively improve the various properties and flame retardant properties of PVC-based wood-plastic composite panels.

The invention discloses a preparation method of a high-wear-resistance wood-plastic composite material, which comprises the following steps: by taking straw as a raw material, modifying the straw through borax, loading the straw with zirconium dioxide at a high temperature, performing cross weaving on the straw and a thermoplastic plastic film to form a laminated assembly, and finally realizing curing and molding of the composite material through a hot press molding technology. According to the invention, the problem of poor interfacial compatibility of straw and thermoplastic polymer is effectively solved through straw treatment, the wettability and adhesiveness of fibers are improved, and the wear resistance of the wood-plastic composite material is further improved by utilizing the self-lubricating property of zirconium dioxide; meanwhile, a new solution is provided for sustainable development through cyclic utilization of straw resources.

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.

The invention provides a wood-plastic-based composite material with 3D textures and a preparation process thereof, belongs to the technical field of 3D wood-plastic material preparation, and solves the technical problems that an existing wood-plastic composite material is single in function, material textures cannot be customized and the like. The structure of the wood-plastic based composite material with the 3D textures sequentially comprises a functional protection layer, an additive printing texture layer and a wood-plastic base material layer from the surface to the core, and interlayer compounding is achieved through surface heating melting and interlayer mutual pressing. The preparation process comprises the following steps: extruding to prepare a wood-plastic base material, shaping, performing 3D texture printing, laminating and treating a finished product. The composite material is prepared through the processes of extrusion preparation of the wood-plastic base material, cooling and shaping, 3D texture printing, conveying and positioning, synchronous film releasing, film relaxation and oscillation, hot air circulation preheating, multi-angle dynamic air pressure film covering, cold air circulation cooling, film cutting and heat sealing and finished product treatment, the preparation process is high in efficiency and low in energy consumption, and the prepared composite material is good in structure effect and good in application prospect. The multifunctional requirement is met, and the finished product is more stable.

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 belongs to the technical field of wood-plastic plates, and particularly relates to a PE wood-plastic composite material and a preparation method thereof. The carbon beads are introduced into a PE wood-plastic formula system to replace traditional calcium powder / talcum powder, a lubricant, an antioxidant and other raw materials, and meanwhile, through the synergistic effect of HDPE and LDPE in different proportions, on one hand, the problem of precipitation caused by lubricating components is solved, on the other hand, various mechanical properties of the PE wood-plastic composite material are improved, and the service life of the PE wood-plastic composite material is prolonged. Wherein the minimum concentrated load can be increased to 30%, the linear expansion coefficient and the shrinkage rate can be reduced by 40%, the vicat softening point can reach 127 DEG C, and the technical problems that the PE wood-plastic composite material is large in precipitation amount and prone to deformation in application are solved.

The invention discloses a preparation method and application of a nano silicon dioxide / wood-plastic composite material for selective laser sintering, relates to a preparation method and application of a polymer wood-plastic composite material for selective laser sintering, and aims to solve the technical problems of high surface roughness and large size deformation of an existing selective laser sintering wood-plastic printing material. The method comprises the following steps: drying poplar powder, carrying out alkali treatment, adding the alkali-treated poplar powder and KH550 into an ethanol solution, carrying out water-bath heating reflux treatment, and drying to obtain the poplar powder treated by KH550; uniformly mixing with pure polyethersulfone powder, calcium carbonate, nano silicon dioxide powder and glycerol, sealing and standing to obtain the composite material. The surface roughness of a part printed by the material through a selective laser sintering process is 7.6-10.6 mu m, the size deformation is 1.7%-4.2%, the tensile strength is 2.4-3.2 MPa, and the hardness is 49-59 HA. The method can be used in the 3D printing field.

The present invention relates to the technical field of wood-plastic materials, and discloses a flame-retardant wood-plastic composite material for pallets and a preparation method thereof. The present invention uses (3-bromopropyl) trimethoxysilane and cardanol as raw materials, and under the catalysis of potassium carbonate, undergoes a substitution reaction to obtain a cardanol-containing silane intermediate, and then undergoes a polycondensation grafting reaction on its wood powder to obtain a cardanol-modified wood powder. Using DOPO, 4-vinylbenzaldehyde, and melamine as raw materials, a DOPO-containing melamine flame retardant is obtained by a phosphine hydrogenation reaction and a Schiff base reaction in sequence, and finally, cardanol-modified wood powder, polyethylene, a DOPO-containing melamine flame retardant, etc. are added to the wood powder, mixed evenly, and injection molding is performed to obtain a flame-retardant wood-plastic composite material for pallets. The flame-retardant wood-plastic composite material for pallets prepared by the present invention has excellent flame retardant properties and antibacterial properties.

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.

A polydiorganosiloxane can be used in a composition and method for preparing a wood-plastic composite product. The wood-plastic composite product can be used as a building material. The polydiorganosiloxane can be added to the composition in liquid form or can form part of a solid carrier component used to prepare the wood-plastic composite product.

The present invention relates to the technical field of polymer composite materials, and specifically discloses a straw fiber modified wood plastic composite material. In the present invention, the straw fiber modified wood plastic composite material includes the following raw materials in parts by mass: 100 parts of polypropylene resin, 25-35 parts of flame retardant modified straw fiber, 3-5 parts of maleic anhydride grafted polypropylene, 12-20 parts of synergist, 1-3 parts of antibacterial agent, 1-1.5 parts of stabilizer and 1-3 parts of lubricant, wherein the flame retardant modified straw fiber is prepared from straw fiber powder, basalt fiber and organic flame retardant 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, and the straw fiber renewable resources are recycled in the present invention, which improves its added value and has significant ecological and environmental benefits. Through chemical grafting, each raw material has good dispersibility and compatibility, and the obtained composite material exhibits excellent mechanical properties and flame retardant properties.

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 present invention belongs to the field of wood-plastic composite materials, and discloses a tung oil / fiber three-dimensional core-shell structure reinforced polylactic acid-based wood-plastic composite material, its preparation method and application. A tung oil / fiber three-dimensional core-shell structure reinforced polylactic acid-based wood-plastic composite material comprises the following raw material components in parts by mass: 20-100 parts of polylactic acid, 1.4-12 parts of tung oil, 6-30 parts of plant fiber, 0.07-0.6 part of initiator, and 0.006-0.05 part of accelerator. The high impact-resistant and environment-friendly wood-plastic composite material reinforced by the tung oil / fiber three-dimensional core-shell structure prepared by the present invention not only has excellent impact resistance, with an impact strength of up to 4.6 KJ / m<supgt;2< / supgt; and a flexural modulus of up to 6400 MPa at most, but also all materials are derived from natural biomass resources, have complete degradability, and can be applied to industries such as packaging and transportation, home decoration and furniture, electronic appliances, etc.

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.

The invention discloses a preparation method of a damp-heat aging resistant wheat straw / polyvinyl chloride composite material. Wheat straw and polyvinyl chloride are used as main raw materials, a plasma treatment technology is adopted for the wheat straw to enhance the hydrophilicity of the surface of the straw, the surface roughness of the straw is improved through laser etching, an interface modifier is introduced to improve the interface compatibility between the straw and a polyvinyl chloride matrix, the treated wheat straw is mixed with the polyvinyl chloride, and the mixture is prepared. And the composite material is prepared through single-screw melt extrusion. According to the invention, the service life of the composite material in a humid and hot environment is prolonged, and an efficient solution is provided for application of the wood-plastic composite material in an aging environment.