160results about How to "High static bending strength" patented technology

The invention relates to a method for producing high-density recombined wood, which is used for manufacturing plates and recombined module timber by the following steps of planning, processing by high-temperature steam, drying, dipping glue, draining glue, drying after draining glue, tidying or weaving, balancing for nourishing, pressing to shape, solidifying at a high temperature and the like. The density of the high-density recombined wood can reach 0.7-1.2kg/cm<3>; the high-density recombined wood has the characteristics of peculiar texture, fine grain, excellent performance, small possibility of cracking and deforming and the like, does not need to prevent insects, prevent mildew, prevent corrosion, prevent from cracking and the like, and can be directly used for the fields of floor, furniture, building and the like. The method disclosed by the invention has simple working procedures, and abandoned secondarily secondary small fuel wood and secondary small wood are utilized to produce plates and module wood, thereby changing waste materials into things of value, and greatly saving forest resource. The wood is an ideal log substitute.

The invention relates to an anti-corrosion bamboo-wood composite board and a preparation method thereof. The preparation method of the anti-corrosion bamboo-wood composite board comprises the following steps: firstly preparing anti-corrosion bamboo strips and heat-treated wood; next, respectively assembling and compressing the anti-corrosion bamboo strips and the heat-treated wood into anti-corrosion bamboo wood and a heat-treated sheet material; and then carrying out assembling and hot compression on the anti-corrosion bamboo wood and the heat-treated sheet material to obtain the anti-corrosion bamboo-wood composite board. The bamboo-wood composite board prepared by the method of the invention has excellent corrosion resistance which reaches the corrosion resisting level specified in national standard GB/T13942.1-1992 Method for Laboratory Test of Natural Decay Resistance of Woods, and also has very high surface abrasion resistance and high mechanical strength which reach the national standards in GB/T 18103-2000 national composite floor.

It relates to bamboo plate production method. 1) it processes bamboo fiber to thread bamboo sheet, 2) bleach, carbonize and dry after modifying property, 3) soaking the said bamboo sheet in glue agent, dry to the water content 10-12%, taking the bamboo plate of the corresponding weight based on 1.1-1.3g/cm3 intensity to fill into the mold, 5) sending the bamboo sheet to heat compressor with compression force 6-10 MPa for 30-60 minutes, setting the compression temperature 100+-5DEG C for melamine resin adhesive, or 135+-5DEG C for phenol aldehyde resin adhesive, and 6)process the compressed plate. The made bamboo plate is even in intensity, high in static curve strength and hardness, anti wearing and good in stability.

The invention provides a wood working process, which comprises the following steps of: the preparation of first mixed solution; the preparation of second mixed solution; square stock impregnation, namely, impregnating a square stock into the first mixed solution to make the square stock absorb the first mixed solution until reaching a completely saturated state, and placing the square stock impregnated in the first mixed solution into the second mixed solution for impregnation to make spaces among wood cells of the square stock absorb the mixed solution until the mass ratio of furfural to the wood is 0.3-0.5:1; hot-pressing, namely, performing hot-pressing on the impregnated square stock; cutting, namely, cutting the square stock into required wood boards; and sanding and notching, namely, sanding and notching the wood boards. The wood boards obtained by the wood working process provided by the invention have the characteristics of high load-bearing properties, high density, high durability, strong bending strength, low water absorption and low expansion ratio.

The invention discloses a continuous hot-pressing method for a large-section section. The method comprises a pretreatment process, a continuous hot-pressing process and a post-treatment process, and is characterized in that: the continuous hot-pressing process comprises the following steps of: A, preheating and prepressing; B, hot-pressing and curing; and C, cooling to guarantee quality. In the method, a continuous blanking mode is adopted, the preheating and the prepressing are increased, and a microwave or high-frequency heating technology is adopted during hot pressing. By the method, a non-lumber small-diameter class bamboo material, a secondary material of poor quality, a single-plate residual material, saw dust and the like are machined into a high-quality material; and the method has the advantages of wide material sources, simple and convenient material manufacturing process, high utilization rate of the material, convenience of operation, low energy consumption, investment saving and the like. Meanwhile, the method can be used for machining the material with any length in a continuous pressing mode and can also be used for machining the material with the thickness of 500mm.

The invention relates to a plastic-wood material, particularly to an elastomer modified plastic-wood composite board and a preparation method thereof. Plastic particles, maleic anhydride grafted plastic particles, kaolin powder, hollow glass microspheres and stearic acid are placed in a mechanical stirring kettle to be stirred and then are extruded and granulated, so as to obtain modified plastic particles; and the modified plastic particles, wood powder, a polyolefin elastomer, a thermoplastic polyurethane elastomer and pigment are placed into the mechanical stirred kettle to be stirred and uniformly mixed, then are melted, blended and extrusion-molded and finally pass through a flat finish mold, so as to obtain the elastomer modified plastic-wood composite board. The elastomer modified plastic-wood composite board provided by the invention has the advantages as follows: the production-manufacturing is convenient, the degree of mechanization of the production process is higher, less labor is required, and the production cost is low; the consumption of plastics is low, environmental friendliness and creep deformation resistance are achieved, the strength and the rigidity are high, and the service life is longer; and the elastomer modified plastic-wood composite board can be widely applied to various fields such as transportation, decoration, municipal gardens and packaging.

The invention relates to an environment-friendly flame-retardant non-adhesive fiberboard of crop straw and a preparation method thereof. The fiberboard is prepared by the following steps that 1 ) wheat straw and sorghum straw are taken to be cut off correspondingly, and the wheat straw and the sorghum straw are soaked in water to obtain a softened material; 2 ) steam explosion is correspondingly carried out on the softened material to obtain wheat straw fiber and sorghum straw fiber; 3 ) nano calcium carbonate, nano zinc oxide are mixed with nano copper oxide, and modifying is carried out toobtain a modified additive A; nano zinc borate, the nano zinc oxide are mixed with the nano copper oxide, and modifying is carried out to obtain a modified additive B; 4 ) the wheat straw fiber and the sorghum straw fiber are mixed with the modified additive A to obtain a core layer mixture; the wheat straw fiber is mixed with the modified additive B to obtain a surface layer mixture; and 5 ) thecore layer mixture is taken as a core layer, the surface layer mixture is taken as a surface layer to be laid and pre-pressed to obtain a slab, after hot-pressing forming and post-treatment are carried out, the environment-friendly flame-retardant non-adhesive fiberboard is obtained. The fiberboard has no formaldehyde release and has good mechanical property, good anti-water, moisture-proof, anti-corrosion and antibacterial properties; and good in fireproof and flame-retardant effects, and suitable for popularization and application.

The invention relates to emulsion paraffin for producing a waterproof fiberboard. The emulsion paraffin comprises solid paraffin, an emulsifier, a colloid stabilizer, a waterproof agent and water. The emulsion paraffin is obtained by self-emulsification in one step based on weakly hydrophilic polyether and/or phenolic ether as the emulsifier and polyvinyl formal as the colloid stabilizer. The preparation method comprises the following steps of: adding solid paraffin, the emulsifier, the waterproof agent and water; heating to 90-95 DEG C to completely dissolve solid paraffin; then, adding the colloid stabilizer polyvinyl formal aqueous solution to self-emulsify the mixed system to form a milk white emulsion; and cooling the emulsion to room temperature to obtain the target product. The reaction process is free from stirring, the mixed liquid is self-emulsified, and the average grain diameter of product particle is not greater than 300nm.

The invention discloses an environment-friendly high-strength bamboo-wood compound shaving board. An anti-corrosion step of bamboo fibers is omitted. Laccase of 8-10 U/g of bamboo fibers and galactosidase of 1-1.3 U/g of bamboo fibers are adopted to be preserved at a specific temperature for a certain period, proper high-temperature treatment is conducted after pressing is conducted, the bamboo fibers can be modified effectively, high intensity is kept while the use amount of glue is reduced, and the board is more resistant to abrasion and more durable. The environment-friendly high-strength bamboo-wood compound shaving board has the effects that the static bending intensity ranges from 26.1 MPa to 28.6 MPa, the internal bonding strength ranges from 1.21 MPa to 1.30 MPa, the free formaldehyde emission ranges from 2.4 mg to 2.6 mg per 100 g, and the water absorption expansion rate ranges from 4.1% to 4.6%.

The invention discloses a preparation method of a wood plastic composite with good interface compatibility and relates to the preparation method of the wood plastic composite. The preparation method can solve the problems of low mechanical strength and poor durability caused by poor interface compatibility between a polymer and the wood cell wall of the existing wood plastic composite. The method comprises the following steps: preparing a functional monomer, a reactive monomer, an initiator and a grafting promoter into impregnation solution, adding wood and the impregnation solution into a reaction tank, immersing the wood in the impregnation solution, firstly carrying out vacuum pumping, and then carrying out pressurization treatment for leading the impregnation solution to enter into a porous structure of the wood; and further carrying out heating treatment on the wood for polymerizing organic matters, and obtaining the wood plastic composite. The wood plastic composite can lead the polymer to be in close contact with pore walls, improve the compressive strength parallel to grain by 70%-120% in comparison with the wood which is not processed, lead the anti-inflation rate after carrying out continuous water immersion for 200h to be 53%-60% and improve the resistance to fungal erosion by 85%-94%, so that the wood plastic composite can be used as the material for indoor furniture and outdoor structures.

The invention discloses a coconut-fiber-reinforced crop straw composite material and a manufacture method thereof, aiming to provide the strong-toughness and environment-friendly biomass composite material having good mechanical property, gluing property, toughness and vibration damping property. The coconut-fiber-reinforced crop straw composite material is formed by adding coconut fibers in crop straw units and uniformly dispersing as well as crossing and interconnecting the coconut fibers in a composite material system to form a bulky mesh structure, wherein the mass fraction of the coconut fibers in the system is 10-50%. The manufacture method comprises the following steps of: preparing and preprocessing of the straw units, preparing of the coconut fibers, unit mixing, gluing, paving and billet assembling, prepressing, hot-press or cold-press molding, postprocessing and the like. The coconut-fiber-reinforced crop straw composite material is free from isocyanate adhesives, so that the preparation cost of an artificial board can be reduced; and the coconut-fiber-reinforced crop straw composite material can be used as a structure material and a damping material and applied to bearing structures and in rigid use environments with frequent vibration fatigue actions and easily occurring impulse loads so as to play roles of bearing, supporting, damping and denoising, and thus, the application field of the crop straw artificial board is enlarged.

The invention discloses flame-retardant furfural-modified urea-formaldehyde resin floor glue which comprises the following components in parts by weight: 250-280 parts of formaldehyde, 120-130 parts of urea, 5-8 parts of furfural, 10-20 parts of polyvinyl acetate emulsion, 15-20 parts of a flame retardant A, and l0-15 parts of a flame retardant B. A preparation method of the floor glue comprises the following steps: adding measured formaldehyde, urea and furfural into a reaction kettle to obtain a solution, adjusting the PH value of the solution to be 8.0-8.5 with a sodium hydroxide solution, raising the temperature from room temperature to 70-75 DEG C, performing thermal reaction for 50-55 min; adding a formic acid solution to adjust the PH value of the reaction to be 5.2-5.5 after the thermal reaction, measuring the viscosity, when the viscosity reaches 22-25 Pa.s, adding the formic acid solution to adjust the PH value of the reaction to be 6.0, adding a measured polyvinyl acetate emulsion, raising the temperature to 85-90 DEG C, adding the measured flame retardant A after 10 min, performing thermal reaction for 70-75 min; then adding the measured flame retardant B, stirring the solution uniformly and performing reaction for 30-35 min and cooling to room temperature to obtain the flame-retardant furfural-modified urea-formaldehyde resin floor glue.

The invention provides a formula and a production method of copy paper. The copy paper comprises the following components in percentage by weight: 5-10 percent of bleached softwood pulp, 3-5 percent of polylactic acid fiber, 20-40 percent of bleached hardwood pulp, 10-20 percent of alkaline peroxide mechanical pulp, 30-45 percent of straw pulp, 2-3 percent of a powdered ink adhesive agent, 0.2-0.5 percent of water solidification resin, and 3-5 percent of sodium polyacrylate. The production method comprises the following steps: pulping, proportioning, papermaking and forming, surface sizing, rewinding, cutting-sorting, and packaging for forming.