300 results about "Static bending" patented technology

The invention discloses an oriented chipboard and a processing technology. The chipboard is composed of three layers including two surface layers and one intermediate core layer, which are adhered together by adhesives; the processing technology uses rotary cut veneer wastes remained in a plywood production process as raw materials to substitute small-diameter standard materials, so that a large volume of wood is saved, and production cost is saved; and simultaneously, the length of the oriented chipboard can be increased by using the method, consequently, inherent mechanical property indexes of the oriented chipboard can be improved, and the oriented chipboard has higher carrying capacity; the oriented chipboard and the processing technology provided by the invention have the advantages that the rotary cut veneer wastes can be used as the raw materials, so that the large volume of wood is saved, the production cost is saved, the static bending strength and the elastic modulus of the produced oriented chipboard are synchronously increased, and the carrying capacity of the oriented chipboard is greatly improved.

The invention relates to the field of rail welding and discloses a method for post-weld heat processing of a rail welded joint. The method comprises the steps that first cooling is conducted to the to-be-cooled rail welded joint obtained through welding till the temperature is lower than 400 DEG C; then, the rail welded joint obtained after the first cooling is heated to a temperature between 860 DEG C and 930 DEG C; and second cooling is then conducted to the rail welded joint till a tread face temperature of the joint is between 410 DEG C and 450 DEG C, wherein the rail welded joint is a welded joint of a 75kg/m hypereutectoid steel rail and a pearlite steel rail. The method disclosed by the invention is used for the post-weld heat processing of the welded joint of the hypereutectoid steel rail and the PG4 heat-processing steel rail; and the heterogeneous rail joint has fewer internal defects and stable welding quality, and can satisfy requirements for passing tests such as a fatigue test, a stretching and impact test and a static bending test.

The invention relates to a surface-decorated oriented strand board and a preparation process of the surface-decorated oriented strand board. The surface-decorated oriented strand board comprises a core layer and a surface layer. Rotary cut veneer leftovers left in the plywood production process are selected as raw materials of the core layer. Sawdust, wood shavings, waste fibers and sanding powder produced in the production process of glued-laminated timber, core-boards, particle boards or medium-density fiberboards are selected as raw materials of the surface layer. The raw materials are subjected to drying, screening, gluing, laying, plate blank sawing and cutting and hot-pressing, and then the surface-decorated oriented strand board can be manufactured. The static bending strength of the oriented strand board in the parallel direction can reach 22-30 MPa, the elasticity modulus of the oriented strand board can reach 3500-4800 MPa, and the surface roughness of the oriented strand board is less than 0.8 micron. The surface-decorated oriented strand board can be directly processed into a decorative surface and can also be widely used for replacing artificial boards such as plywood, the core-boards, the particle boards and the medium-density fiberboards.

The invention relates to a method for manufacturing a bamboo macrofiber composite material. Bunchy bamboo fibers of which the green and yellow are removed are taken as raw materials and dipped with awater soluble phenol formaldehyde adhesive, and the production steps comprise material preparation (comprising the preparation of bamboo macrofiber reinforcement and a water soluble phenol formaldehyde resin matrix), adhesive dipping, extraction, warm-pressing, curing and post curing. The method has the advantages that: (1) the method has reasonable process, strong production continuity, high efficiency, low energy consumption, and no environmental pollution; (2) the manufactured bamboo macrofiber composite material has no mold and no crack, and has the density between 0.9 and 1.3g/cm<3>, thehardness between 60 and 150MPa, the static bending strength between 140 and 160MPa, the water-absorbing expansion rate between 0.3 and 2 percent, the surface wear resistance between 0.04 and 0.09g/100r, and the formaldehyde emission between 0.1 and 0.4mg/L; and (3) the invention provides a more positive production technique for reasonably utilizing the bamboo resources, so that the reconstituted bamboo timber application prospect is better.

The invention relates to the technical field of display, and discloses a cover plate, a preparation method of the cover plate, a display panel and a display device. The bending reliability and deformation recovery reliability of the cover plate are improved. The cover plate comprises a transparent substrate layer and a hardening layer located above the transparent substrate layer, wherein the transparent substrate layer comprises a bent area and a non-bent area; soft hardening materials and rigid hardening materials are alternately arranged on the portion, on the bent area, of the hardening layer; the portion, on the non-bent area, of the hardening layer is provided with a rigid hardening material. In the cover plate, the bent area is provided with the flexible hardening materials so thatthe hardening layer breaking phenomenon cannot occur when the bending radius of the bent area of the cover plate is small, and then the bending reliability of the cover plate can be improved. Meanwhile, the rigid hardening materials of the bent area and the rigid hardening material of the non-bent area are arranged so that the surface hardness of the cover plate can be guaranteed, the cover platecan still restore a flat state after dynamic bending or long-time static bending.

The invention relates to a method for producing a building composite rubber plate, in particular to a method for producing a bamboo-wood composite board. The method for producing the bamboo-wood composite board is implemented by the following technical scheme that the method for producing the bamboo-wood composite board comprises the following steps of: (1) preparation of a core board and a surface board; and (2) compounding process of the core board and the surface board. The bamboo-wood composite board prepared by implementing the method disclosed by the invention has the advantages of low buckling deformation and high static bending strength.

The invention relates to an impregnation densified veneer enhanced laminated veneer lumber and a manufacturing method of the impregnation densified veneer enhanced laminated veneer lumber, the impregnation densified veneer enhanced laminated veneer lumber structurally consists of an impregnation veneer or/and an impregnation densified veneer and a wood veneer, wherein the impregnation veneer or the impregnation densified veneer is used as the surface layer and the subsurface layer of a laminated veneer lumber plate blank or all layers of the plate blank and is used for increasing the modulus of elasticity and the static bending strength of the laminated veneer lumber. The impregnation densified veneer enhanced laminated veneer lumber has the advantages that: a thick veneer made of fast-growing wood is adopted as raw material to manufacture the impregnation densified veneer enhanced laminated veneer lumber, the intension is high, the dimensional stability is good, the physical mechanical property can meet the requirement of structural laminated veneer lumber standard in China, the impregnation densified veneer enhanced laminated veneer lumber can totally replace high-quality solid wood converted timber and can be used in a constructional engineering structure and used as a high class cement concrete framework, heavy electro machinery packing material and the like. The fast-growing wood is utilized effectively and comprehensively, nature timber resources are saved, the ecological environment is protected, the additional value of a product is increased, and the supply and demand contradiction to major diameter class nature timber in domestic market is remitted.

The invention discloses a soybean-based formaldehydeless adhesive used for chipboards, and an application method thereof. The soybean-based formaldehydeless adhesive is prepared from, by weight, 10-30 parts of a soybean derivative, 0.1-1 part of an acidity-alkalinity adjusting agent, 1-30 parts of a cross-linking agent, 0.1-1 part of a mildew inhibitor, 0.1-1 part of a leveling agent, 10-100 parts of water and 5-50 parts of a tackifier. Multi-component adhesive application is adopted to solve the problems of unable adhesive application of commercial soybean adhesives and too high water content of wood shavings after adhesive application, and the tackifier is used to solve the problems of poor initial viscosity of chipboards made by using the soybean adhesives, poor pre-forming property after adhesive application of wood shavings, and low static bending strength and large water absorption thickness swelling rate of boards.

The invention belongs to the field of board machining and particularly relates to a production process of a high-grade fir melamine ecological board. The process particularly includes the following steps of poplar middle plate selection, poplar middle plate splicing, fir core veneer selection, fir core veneer sanding, fir core veneer slotting, core veneer gluing, infrared ray board arrangement for forming a blank, cold pressing, core cutting, hot pressing, putty application, maintenance, sanding, semi-checking, secondary putty application, secondary sanding, gluing and veneering, base board cold pressing, base board edge cutting, base board hot pressing, base board putty application, base board fixed-thickness sanding, base board edge sawing, base board inspection, repairing, melamine impregnated paper hot pressing and finished product inspection, packaging and warehousing of finished products. The production process has the advantages that fir core veneers are adopted, the hardness, nail-holding ability and static bending strength of the board is improved; eucalyptus middle plates are replaced with poplar middle plates, and the defects that the surface of the finished products is stained and carbonized caused by multiple burrs and scabs on the surfaces of the gum wood are reduced effectively.

The invention discloses a zero-carbon high-fiber environment-friendly sheet synthesized by waste circuit board powder and a preparation process thereof. The pressing raw materials of the environment-friendly sheet comprise: circuit board recycled powder, wood fiber powder, a cross-linking agent, a waterproofing agent, and carbon filament fiber; the production process of the sheet comprises the following steps of: drying the circuit board recycled powder at a constant temperature; converting high fiber auxiliary materials into wood fiber powder above 80 meshes, drying, and then stirring under 180 DEG C to form carbon fiber powder; adding a processing assistant and blending uniformly again; and feeding materials, paving pressing plates, pressurizing, standing, complementing pressure, and gently decompressing to produce the sheet. The pressure during the production process is controlled so that the sheet is stable in quality and high in intensity; the sheet synthesized by wood fiber powder obtained by recycling crop straw, bamboo and wood saw powder and the like with the waster circuit board powder can be sawn, drilled, processed, and shaped easily; furthermore, the sheet is excellent in waterproof and fireproof performances, and high in static bending strength; and the utilization of waste materials reaches the purposes of environmental protection and low carbon.

The invention discloses a low-cost high-strength flame-retardant smoke-suppressing artificial board inorganic adhesive and a preparation method thereof. The low-cost high-strength flame-retardant smoke-suppressing artificial board inorganic adhesive comprises the following components in parts by weight: 30-50 parts of magnesium oxide, 20-40 parts of magnesium chloride, 30-60 parts of water, 3-8 parts of polyvinyl alcohol, 1-5 parts of trisodium phosphate, 2-7 parts of water glass, 0.08-0.1 part of tartaric acid, 0.5-3 parts of sulfonic acid, 0.05-0.3 part of octylphenol polyvinyl ether and 0.01-0.2 part of sodium carboxymethyl cellulose. The low-cost high-strength flame-retardant smoke-suppressing artificial board inorganic adhesive prepared through the method is noninflammable and achieves outstanding flame-retardant smoke-suppressing property on an artificial board. The fire-proof grade of the prepared artificial board achieves A2 grade through testing; the price of the prepared artificial board only accounts for 5% of the price of an isocyanate adhesive and accounts for 50% of the price of an urea-formaldehyde resin adhesive; the internal bonding strength of the produced artificial board achieves 1.05 MPa, the static bending intensity achieves 16.5 MPa, and the 24-hour water absorption thickness expansion ratio is only 1.1%. The low-cost high-strength flame-retardant smoke-suppressing artificial board inorganic adhesive disclosed by the invention can not release any harmful gas and achieves outstanding environmental-friendly property.

The invention discloses three-laminated composite board type full-nutritional rice seedling breeding bedding and a preparation method thereof and relates to rice seedling breeding bedding and a preparation method thereof. The problems that existing seedling breeding bedding is poor in water-retaining property, fertilizer efficiency in the later period of seedling breeding is poor, strength is low, and the existing seedling breeding bedding is not suitable for being transported and carried are solved. The seedling breeding bedding is divided into three layers from top to bottom, the middle layer is a core layer, and the surface layers are located on the two sides of the core layer. The preparation method comprises the following steps that (1), straw is cut into sections; (2), steaming and softening are conducted; (3), the straw is ground and kneaded to be in a fiber shape and is dried; (4), mixing is conducted; (5), paving is conducted; and (6), hot-pressing is conducted. According to the three-laminated composite board type full-nutritional rice seedling breeding bedding (as shown in figure 1) produced through the preparation method, when no water is absorbed by the three-laminated composite board type full-nutritional rice seedling breeding bedding, the static bending intensity is 21-22.8 MPa, and the internal bonding strength is 0.35-0.40 MPa; and the three-laminated composite board type full-nutritional rice seedling breeding bedding is high in strength, not prone to breakage or damage and easy to cut and can be manufactured to be in different shapes.

The invention discloses a method for manufacturing an anti-insect and anti-mold oriented strand board with full eucalyptus leftover materials. The manufacturing method comprises the following steps of: preparing materials, drying, peeling and removing impurities, sorting and storing, respectively gluing on a surface core layer, hierarchically paving, in advance hot press molding, and sanding wood finishes; an isocyanate sawdust powder hybrid adhesive is coated on the surface, and an anti-insect and anti-mold composite urea-formaldehyde resin adhesive is coated on the core layer; wood shavings on the core layer are divided into three-layer structures, comprising intermediate layer of core layer, upper surface layer of core layer and lower surface layer of core layer; the intermediate layer of the core layer is paved longitudinally, and the upper surface layer of the core layer and the lower surface layer and surface layer of the core layer are paved horizontally. For the oriented strand board prepared by the method, the static bending intensity in a parallel direction is in a scope of 33-39 MPA, the parallel elasticity modulus is in the scope of 4614-4779 MPA, the vertical elasticity modulus is in the scope of 1504-1771 MPA, the thickness swelling rate of water absorption in 24 h is in the scope of 10%-17%, and the vertical nail-holding power reaches up to 89000N. In the manufacturing method, a problem that the board is easy to suffer from erosion of white ants and moths is thoroughly solved by adding an anti-insect and anti-mold additive, and the service life of the board is prolonged.

The invention provides a fiberboard production process for an elecampane non-formaldehyde floor base material and relates to the technical field of artificial board production. The fiberboard production process comprises the steps of using pines and poplars as raw materials, chipping, screening and deironing, preparing fiber and sizing-drying, laying and hot-pressing, processing rough boards, sanding and cutting the boards and the like, a certain proportion of jasmine or sandalwood and other flavoring agents are added in a waterproof agent adopted in the fiber preparing and sizing-drying step, and an urea-formaldehyde resin adhesive is replaced by a polyurethane adhesive. In the fiberboard production process, a continuous flat pressing technology is adopted, and accordingly the elasticity modulus, static bending intensity and physical and mechanical properties of products are further improved by fully mixing the pines and poplars in certain proportion. The products do not contain formaldehyde and is good in waterproof performance by adopting the polyurethane adhesive to replace the urea-formaldehyde resin adhesive during production of fiberboards for floor base materials. In addition, a certain proportion of jasmine or sandalwood and other flavoring agents are added in the waterproof agent, so that the products have fragrance and have the advantages of being stable in quality, environment-friendly and healthy.

The invention discloses a bamboo and wood interface compound board, which includes lengthwise arranged bamboo pieces and transverse arranged wood single boards. The bamboo piece and the single wood boards are compounded together layer by layer from outside in; the external layer is made up of three layers of bamboo pieces, the core layer is made p of single layer wood board and two layers of bamboo pieces. They are also can be compounded: the external layer is one bamboo banquet, the core layer is made up of single layer board and two layers of bamboo pieces, the furthest layer is bamboo piece. The compressing rate is more than 25%, the intensity is more than 21kg/cm2, the static bending modulus is more than 1000kg/cm2, the elastic modulus is more than 100ton/cm2.

The invention discloses a scrimber and a manufacturing method thereof. The scrimber is prepared by the following steps: taking braches as raw materials, and cutting, peeling and grinding the branchesinto bunchy macrofiber; removing hemicelluloses and pectin; dipping a water soluble phenol formaldehyde adhesive; extracting free phenol and water content of the free phenol in vacuum; warmly pressinginto sections; performing curing; and performing after curing. The physical and mechanical properties of the scrimber are as follows: the density is between 0.9 and 1.3g/cm<3>; the hardness is between 60 and 120MPa; the static bending strength is between 90 and 150MPa; the water-absorbing expansion rate is between 0.3 and 2 percent; and the formaldehyde emission is between 0.1 and 0.4mg/L. The invention has the advantages that: the invention provides a scrimber product with no mold, no crack and no horizontal warpage; the manufacturing method for the scrimber has reasonable process, high efficiency, low energy consumption and no environmental pollution, the production flow has strong continuity and high connection degree, and the scrimber can be produced on a large scale; and the prospectof fully utilizing branch resources is better.

The invention relates to a bamboo wood composite plywood for a concrete template and a method for manufacturing the same. The bamboo wood composite plywood is provided with a body which is manufactured from a first log rotary cut veneer and a bamboo curtain in alternate arrangement through hot pressing; the body has odd layers; and the first log rotary cut veneer is positioned on the surface layer of the body. The outer side of the body can also be a composite bamboo mat or a veneer. The method for manufacturing the bamboo wood composite plywood comprises the steps of carrying out assembly, prepressing, aging, and hot pressing on the log rotary cut veneer, the bamboo curtain and/or the bamboo mat, and the like. The bamboo wood composite plywood realizes combination of bamboo and the log rotary cut veneer, improves the utilization rate of wood and the bamboo, simultaneously improves the performance greatly, has a more stable structure, and greatly improves bonding strength and transverse static bending strength; and in the manufacturing process, the method does not need to carry out complex gum dipping and other treatment on the bamboo curtain, the bamboo mat, and the like, greatly reduces the use amount of an adhesive, reduces the machining cost, and is favorable for environmental protection.

The invention relates to a machining process for an artificial board, in particular to a method for producing a uniform-density bamboo shaving board. The invention is realized through the following technical scheme: the method for producing the uniform-density bamboo shaving board is characterized by sequentially comprising the following steps of: (1) selecting materials; (2) first screening; (3) first drying; (4) second screening; (5) second drying; (6) sizing; (7) hot-pressing; and (8) refrigerating. The uniform-density bamboo shaving board has the advantages of density uniformity, high dimensional stability and high static bending strength.

The invention relates to a full-bamboo and high strength composite industrial floor board, which is characterized in that auxiliary materials (offcut materials of semi-finished products) of bamboos (of any variety), bamboo treetop, bamboo branches, waste trifling and waste strips are adopted to make into medium density (more than 750kg/m<3>) or high density (more than 850kg/m<3>) full-bamboo fiber board for manufacturing the core board by the steps of cleaning, softening, burnishing, adhering by modified urea formaldehyde or modified phenolic resin adhesives, and processing at high temperature and high pressure. As result of long length and good flexibility, the bamboo fibers are crosswise rearranged and adhered during the softening, burnishing, adhering and thermally pressing molding processes, the indexes of static bending strength and elastic modulus of longitudinal and transverse texture, and the shearing force are also increased and the characteristics of the bamboo are optimized. Therefore, the composite industrial floor board is an ideal full-bamboo core board material and improves the comprehensive utilization ratio of the full bamboo (the utilization rate is more than 95 percent).

The invention discloses a compound enhanced wood-plastic composite plate and a preparation method thereof. The preparation method comprises the following steps of: diluting vinyltriethoxysilane with tap water; putting wood flour into the above water solution, evenly shaking, and ultrasonically processing with ultrasonic waves to obtain enhanced wood flour; stirring, extruding and pelleting the enhanced wood flour, plastic particles, plastic particles grafted by maleic anhydride, potassium titanate whisker, chopped glass fiber powder and oxidic polyethylene to obtain composite particles; and evenly stirring the composite particles, ethylhexyl stearate, terpene resin and an antioxidant again and then melting, blending and extruding via an extruder to obtain the wood-plastic composite plate. In the invention, the production process is convenient and the production cost is low. The compound enhanced wood-plastic composite plate has the advantages of small dosage of plastic, environmental protection, good ageing resistance and deformation resistance and good buckling deformation resistance; and compared with other wood-plastic composite plates, the mechanical properties such as the static bending intensity, the impact strength and the like are more excellent, the service life is longer, and the application range is wider. The compound enhanced wood-plastic composite plate cannot only be used for making floors, but also can be hung up.

The invention discloses a hard wood board produced by using reclaimed rubber and a preparation method thereof. The hard wood board has the preparation method that the wasted rubber product is desulfurized to produce the reclaimed rubber, and then a kneader is used to make 100 parts weight of reclaimed rubber, 10 to 20 parts of curing agent, 0.3 to 5 parts of curing accelerator, 0.1 to 10 parts of activating agent, 1 to 80 parts of bulk additive, 0.1 to 1.5 parts of anti-aging agent, and 0.1 to 5 parts of plasticizer according to the weight part mixed evenly, then the evenly mixed materials are put to the vulcanizing paste press for pressing and shaping as well as sulfurization, the sulfurization temperature is 140 to 180 DEG C, the pressure is 20 to 40 MPa, and the time is 20 to 60 minutes, finally the required hard wood board is prepared. The hard wood board of the invention has very high static bending intensity and modulus, and can be used as structure material instead of the traditional hard wood, and the hard wood board also has good anti-aging property and long service life.

The invention relates to a glued bamboo board and a preparation method thereof, in particular to a bamboo board prepared by gluing a restructured bamboo board and a bamboo chip glued board and belongs to the technical field of bamboo development and bamboo board processing. The glued bamboo board comprises an upper layer, a middle layer and a lower layer, wherein the upper layer and the lower layer are restructured bamboo boards; and the bamboo filament arrangement direction of the restructured bamboo boards is vertical to board faces per se. The glued bamboo board of the invention has the advantages of high surface finish, high density, high grade, high overall static bending strength, high compression strength, high impact strength, high surface hardness, low thickness swelling rate of water absorption and high size stability.