55results about How to "Low water expansion" patented technology

The invention discloses a wood-plastic composite material and a preparation method thereof, and the wood-plastic composite material comprises the following raw materials according to the mixing ratio by parts by weight: 30-80 parts of modified fiber powder; 15-80 parts of plastics; 2-10 parts of phase solvent; 2-10 parts of lubricant; 0-10 parts of stabilizer; 0.2-1.0 part of antioxidant; 5-15 parts of filler; and 2-20 parts of flame retardant. Lignin is utilized for modifying fiber powder, then composition with the plastics is carried out, and a finished-product material is formed by extrusion. The preparation method can solve the problems of the compatibility of wood fibers with the thermoplastic plastics, the surface treatment technology of the raw materials by utilizing the lignin and the like, realize the comprehensive utilization of the lignin and the waste plastics, be capable of replacing wood, increase the additional value of the lignin and solve the utilization problem of the lignin wastes. The manufactured wood-plastic composite material can significantly improve the mechanical performance, the tensile strength, the flexural strength and the impact resistance, and realize the industrial production of high-performance products, such as construction materials.

The invention belongs to the technical field of high polymer materials and relates to a side-chain sulfonic acid type polyarylether polymer which has high thermal stability and is used in a proton exchange membrane of a fuel cell and a preparation method thereof. The preparation method comprises the following steps: adding a diphenol monomer, a sulfonated difluoro-monomer, a difluoro-monomer and anhydrous potassium carbonate in a three-necked bottle provided with a stirrer, a water-carrying device and a nitrogen hole, adding a solvent and an azeotropic dehydrant which accounts for 20% of the solvent by volume in the three-necked bottle, injecting nitrogen, and heating to reflux the azeotropic dehydrant; and refluxing for 2-5h to dehydrate, evaporating the azeotropic dehydrant, heating to 175-190 DEG C to react for 5-8h, then pouring the reaction mixture in water to obtain a polymer, grinding the polymer to fine particles by using a grinder, filtering by using a buchner funnel, washingwith deionized water and ethanol several times, and performing vacuum drying at 100-110 DEG C for 10-15h to obtain the side-chain sulfonic acid type polyarylether polymer with high thermal stability,good solubility and film-forming property and low water absorption rate.

A nano-class composite wooden material for plate, tube, or section is proportionally prepared from laminar silicate, high-molecular resin, natural plant fibers, inorganic filler, and chemical assistant through proportional mixing, and extruding out or injection moudling. It is possible to granulate before it is shaped.

The invention discloses a wood plastic composite and a preparation method thereof. The wood plastic composite comprises the following raw materials according to parts by weight: 30-80 parts of modified wood fiber, 20-70 parts of plastic, 2-10 parts of compatilizer, 2-10 parts of lubricant, 0.2-1.0 part of antioxidant, 5-15 parts of filler and 2-10 parts of fire retardant. 'forestry three waste' wood wastes are prepared onto modified wood fibers with an explosion treatment method, wherein the modified wood fibers are mutually separated, and eh surface of the modified wood fibers is covered with lignin; then the modified wood fiber is compounded with plastic; and the product is extruded to form finished product material. According to the wood plastic composite, the technical problems of poor compatibility of wood fiber and thermoplastic plastics can be solved to realize the purpose of comprehensively utilizing the 'forestry three waste' wood and plastic, the wood can be omitted, and the additional value of the forest residue is increased. The wood plastic composite manufactured with the preparation method has high mechanical property, and strong tensile strength, bending strength and impact strength of composite material, and the industrial production of high-performance products, such as building engineering materials, can be realized.

The invention discloses a high polymer composite for an embedded rail system, which comprises the following components by weight percentage: 100% of base material, a filling material, 2-25% of damping liquid, 0-15% of curing agent, an appropriate amount of defoaming agent, an appropriate amount of colorant and an appropriate amount of plasticizer, wherein the base material is polyurethane modified epoxy resin; the filling material comprises the following components by weight percentage: 20-100% of rubber particle, 5-200% of cork powder, 5-100% of slag, 5-60% of expanded perlite and 5-45% of cement expanded perlite. The high polymer composite can meet three-way rigidity requirements of the rail system, has good damping capacity and fatigue resistance, does not crack after three million fatigue tests, is excellent in electrical insulation, green and environment-friendly, and can be recycled and smashed as filling for repeated use.

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 discloses an organosilane crosslinked polyethylene wood-plastic composite material and a preparation method thereof, relates to wood-plastic composite materials and preparation methods and aims at solving the problem of lowering of performance like strength, tenacity and creep resistance of a PE wood-plastic composite material in the long-time outdoor using process due to water absorbing. The organosilane crosslinked polyethylene wood-plastic composite material is prepared by polyethylene, plant fibers, lubricant, silane coupling agent, initiator, catalyst and antioxidant. The preparation method includes drying and grinding the plant fibers; mixing the plant fibers with polyethylene and the lubricant; mixing with the silane coupling agent, the initiator, the catalyst and the antioxidant; utilizing a double-screw extruder to obtain the organosilane crosslinked polyethylene wood-plastic composite material.

The invention discloses a preparation method for producing a wood board or a flitch beam, which is characterized by comprising the following steps: a, flattening and peeling small wood, brushwood, rotary-cut heart wood or useless natural wood which has a diameter of less than 100 millimeters and more than 10 millimeters; b, radially and roughly separating and finely separating fibers of the wood; c, radially expanding or leveling the finely separated fibers of the wood; d, drying the level fibers of the wood; e, applying a bonding adhesive onto the dried and leveled fibers; f, starting longitudinally splicing and paving the leveled fibers obtained after bonding adhesive application along the direction of the fibers of the wood to form a uniform and level wood fiber board blank; g, forming the wood fiber board blank through hot press to form a rough board; h, cooling the rough board; and I, cutting the rough board to form different boards or flitch beams.

The invention belongs to the filed of wood floors and discloses a new preparation method of a novel composite resin wood floor material. The preparation method of the composite resin wood floor material comprises the following steps: (1) preparing pine processed wastes, poplar saw dust and birch saw dust, and firstly drying the wastes and saw dust of different wood materials; (2) weighing 35-45 parts by weight of the pine processed wastes, 25-35 parts by weight of the poplar saw dust and 20-25 parts by weight of the birch saw dust, and mixing; (3) subsequently adding 10-15 parts of polyvinyl chloride resin, 3-6 parts of magnesium sulfate powder, 5-9 parts of polyvinyl alcohol and 4-10 parts of binary chlorinated paraffin resin into a high-speed mixer, and mixing until the materials are uniform; (4) extruding the uniformly-mixed materials in a production line to obtain the composite resin wood floor material.

The invention provides a camera module, comprising lens assemblies and a base, wherein the base comprises a lens bearing part, optical filter bearing parts and cylinder parts. The optical filter bearing parts are made of a metal material and are integrated with the lens bearing part and the cylinder parts through utilization of an integration technology.

The invention discloses a novel macromolecule veneer bamboo polywood. The novel macromolecule veneer bamboo polywood is formed by pressing bamboo mixed adhesives. The novel macromolecule veneer bamboo polywood comprises an upper plastic board, a lower plastic board and a wood layer located between the plastic boards and thermally molten with the plastic boards. The plastic boards include the upper plastic board and the lower plastic boards. The wood layer is formed by sequentially arranging bamboo chips in a criss-cross mode and pressing the bamboo chips through fixed adhesives; a padding area is formed in a gap with the size being 0.5-5 mm arranged at the contact position between the two bamboo chips, and the filling area is filled with a transverse overflow adhesive layer. According to the novel macromolecule veneer bamboo polywood, the density and mechanical strength are uniform, no separation layer appears, the structure is firm, the shear strength is high, the surface is smooth and not prone to water seepage, and the service life is greatly prolonged.

The invention discloses a low-expansion-rate waste tire rubber powder modified bamboo fiberboard. The low-expansion-rate waste tire rubber powder modified bamboo fiberboard is prepared by the following raw materials in parts by weight: 162-164 parts of bamboo fibers, a proper amount of 0.2% sodium hydroxide solution, 16.2-16.7 of soy isolate proteins, 1.5-1.6 of preservatives, 7-8 of waste tire rubber powder, 0.8-1 of ascorbyl palmitate, 1.3-1.6 of nanometer polytetrafluoroethylene, 1.5-1.8 of cyanuric acid melamine, and 0.4-0.6 of dimethyl dithioglycolic acid diisooctyl tin. The bamboo fiberboard uses the waste tire rubber powder for modifying, so that the board surface shows excellent hydrophobicity; and ascorbyl palmitate, nanometer polytetrafluoroethylene, cyanuric acid melamine and dimethyl dithioglycolic acid diisooctyl tin are used, so that the board is excellent in water and oil resistance, low in water expanding rate, excellent in ageing resistance, excellent in light resistance and suitable for manufacturing indoor and outdoor office furniture and floors.

The invention relates to the technical field of wood processing, in particular to a multi-layer board integral hot pressing process. The method comprises the following steps that firstly, repeatedly spraying and airing is carried out on a wood board so that the water absorption expansion rate of the wood board can be effectively reduced, then the wood board can be effectively prevented from beingprone to absorb water and damaged after being made into a drawing board, and the ageing resistance of the board is enhanced; then the wood board is placed into an anti-corrosion liquid, so that the anti-corrosion effect of the wood board is enhanced, then the moisture content of the wood board is reduced through hot air circulation drying, and therefore the inner temperature and the outer temperature of the wood board are uniform and consistent, the moisture content of the wood board is reduced, and the firmness of the wood board is improved; and finally, the wood board is subjected to coronatreatment, so that the static property of the wood board is enhanced, the adhesion of the subsequent wood board is better, then the wood board is bonded through an adhesive, hot pressing and freezingtreatment are carried out, and then the prepared multi-layer board is good in bonding effect and high in firmness.

The invention discloses a straw particle board and a preparation method thereof. The method comprises the following steps: 1 spraying a phenolic adhesive or adhesive coupling agent mixed solution onto smashed straws till the smashed straws are completely wetted, stewing the straws, then drying the straws, and paving the straws to form a board blank; 2, covering the board blank with steel plates, and carrying out pre-pressing; 3, drying the pre-pressed board blank at 30 to 40 DEG C till the moisture content is less than 5 percent; 4, uniformly covering the surface of the dried board blank with a layer of sodium lignin sulfonate with the thickness of 1 to 3 mm, and carrying out moisture absorption at the humidity of 80 to 100 percent and the temperature of 60 to 65 DEG C till the moisture content is 6 to 8 percent; and 5, placing cushion blocks at the edges between the upper and lower steel plates of the board blank subjected to the moisture absorption, carrying out thermal pressing, and releasing the pressure to obtain the straw particle board. The straw particle board disclosed by the invention is high in performance and low in cost, and has the bending strength of 20 MPa or above and the internal combination strength of 0.2 to 0.3 MPa.

The invention provides a manufacturing method of a crop stalk mixing manufactured formaldehyde-free artificial board. The manufacturing method of the crop stalk mixing manufactured formaldehyde-free artificial board is characterized by comprising the following steps that 1, hemp crop stalks are crushed, a first polymerized MDI adhesive which the weight accounts for 3%-8% of the hemp crop stalks and a formaldehyde-free modifier which the weight accounts for 3%-5% of the hemp crop stalks are added, and stirring and mixing are carried out; 2, cotton stalks are crushed, a second polymerized MDI glue which the weight accounts for 2%-6% of the cotton stalks and the formaldehyde-free modifier which the weight accounts for 2%-5% of the cotton stalks are added, and the stirring and the mixing arecarried out; 3, the cotton stalks which are stirred and mixed are used as a core layer, the hemp crop stalks serve as a surface layer, and layered laying are carried out to form a slab; and 4, compression molding is carried out on the slab, and post-treatment is carried out to obtain the artificial board.

The invention is an environmental-protection complex floor, comprising a surface layer being of a single wood plate with beautiful veins and tenacious quality and a bottom layer being of a singe wood plate with loose quality, and characterized in that it is provided with a core layer being of a formaldehyde-free stalk homogeneous flakeboard; the single wood plates in the surface and bottom layers are 1.5-2.5 mm thick. The invention solves the technical problems: the surface of the floor need be tenacious and wearable, and its bottom surface need be loose and contacts with the base well, it does not get damp and is not slippery, and it can save large amount of wood.

The invention belongs to the technical field of building decoration materials and in particular relates to an energy-saving type humidity-regulating vitrified plate for a building and a preparation method thereof. In order to solve the problem that in the prior art, a material is easily affected with damp, problems of wet swelling, dry shrinking, and mildewing exist, and even if various damp-prooftreatments are carried out, the problems cannot be completely solved, the invention provides the energy-saving type humidity-regulating vitrified plate for the building. The energy-saving type humidity-regulating vitrified plate for the building is composed of a base material 1 and a humidity-regulating vitrified layer 2. The humidity-regulating vitrified layer 2 is arranged on the upper surfaceof the base material 1, the base material 1 is any one of a calcium silicate board, an inorganic honeycomb grouting board and a magnesium sulfate board, and the humidity-regulating vitrified layer 2 is 0.1-3 mm thick. The energy-saving type humidity-regulating vitrified plate for the building provided by the invention is relatively small in water absorbing expansion rate and uniform in material pore size distribution, has a better humidity-regulating function at relative humidity from 40% to 90%, is free of an obvious softening phenomenon on the surface, is pollution-resistant and can be scrubbed.

According to the glue-free fiber plastified plate and the preparation method thereof, wood fibers are prepared by dissociating a wood secondary wall S2 layer, the wood fibers are subjected to directional oxidation through sodium periodate to prepare dialdehyde modified wood fibers, the water content of the dialdehyde modified wood fibers is regulated and controlled to be 9%-15%, the dialdehyde modified wood fibers are subjected to hot pressing at the temperature of 75-100 DEG C to form the plate, and the glue-free fiber plastified plate is obtained. Therefore, the glue-free fiber plastified plate with high static bending intensity and low water absorption expansion rate is prepared.