233results about How to "Stop the spread" patented technology

The invention belongs to the technical field of material preparation, and aims to solve the problems of interface separation and weak oxidation resistance under complex working conditions caused by insufficient interface bonding force of the existing carbon / carbon composite material. In order to achieve the purpose, the invention provides a carbon / carbon composite material and a preparation method thereof. The carbon / carbon composite material comprises the following components in percentage by mass: 40%-55% of polyacrylonitrile-based carbon fibers, 10%-25% of pitch-based carbon fibers, 8%-20% of nano silicon dioxide grafted carbon fibers, 8%-20% of biological pitch, 8%-15% of nano graphene modified phenolic resin, 3%-6% of silicon carbide whiskers, 2%-4% of zirconium boride nanoparticles, 2%-4% of graphitized carbon fibers and 1%-3% of a natural plant extract antioxidant. The carbon / carbon composite material provided by the invention can provide stable interface bonding force and remarkable oxidation resistance, so that the structural integrity and mechanical property stability of the material when bearing various complex stresses such as stretching, compression, bending, shearing and the like are guaranteed, and the application range of the material in the field of high-temperature oxidation resistance is widened.

The invention relates to the technical field of metal surface treatment, and discloses sheet metal part spraying and plastic spraying equipment and a technological method.The sheet metal part spraying and plastic spraying equipment comprises a spraying chamber and a conveying mechanism, the spraying chamber is arranged in the middle of the conveying mechanism, and a material distributing plate is installed at the top of the spraying chamber; two spraying mechanisms are arranged on the side, close to the material distributing plate, of the interior of the spraying chamber, a plurality of evenly-distributed spraying guns are arranged in the two spraying mechanisms, an air pressure tank and a conveying pipe are installed on the side, close to the material distributing plate, of each spraying gun, and a pump body is installed on the side, away from the spraying guns, of each conveying pipe; and a paint storage tank is arranged on the rear side of the spraying chamber. The position and the angle of the spraying gun are accurately controlled, and the automatic adjusting device is utilized, so that the spraying gun can be dynamically adjusted according to the surface shape and the size of the sheet metal part, and all corners of a workpiece are uniformly and comprehensively covered with paint.

The invention provides an explosion-proof lithium battery fire extinguishing method and system. The method comprises the following steps: arranging a temperature sensor with a unique identifier on each battery module; the temperature is detected in real time through a temperature sensor, and the temperature change rate is calculated; when the temperature is lower than a first preset temperature threshold value and the change rate exceeds a preset change rate threshold value, a temperature sensing spray head around the corresponding module is controlled to spray a fire extinguishing medium; when the temperature reaches a first preset temperature threshold value, a temperature sensing nozzle around a corresponding module is started, the spreading direction of thermal runaway is judged, and preventive injection is conducted in the pre-judged direction; and when the temperature exceeds a second preset temperature threshold value, each temperature sensing spray head is controlled to spray. The system comprises an explosion-proof lithium battery box, a fire-fighting device, a detection device and a control device, wherein the control device comprises a data acquisition module, a data processing module, a control module and an alarm module. According to the invention, through a hierarchical control strategy, local-to-global fire extinguishing measure upgrading is realized, and lithium battery thermal runaway accidents can be effectively prevented and controlled.

The invention belongs to the technical field of geotechnical engineering, and particularly relates to a nanocarbon reinforced superfine cement-based blocking material as well as a preparation method and application thereof. The superfine cement-based blocking material prepared by the invention is prepared by uniformly mixing 45-50 parts of cement, 0.5-2.5 parts of a solid waste sintered active material, 0-0.05 part of a water reducing agent, 0.015-0.1 part of carbon nanotubes, 0.5-2.5 parts of a 1% solution of carbon quantum dots and 45-50 parts of water. The material has relatively low porosity and is not dispersed; the high groutability is achieved, and the material can permeate into tiny holes; and it is guaranteed that the material has high strength, the crushed rock bonding and reinforcing strength is high, and the material has wide application prospects.

The invention belongs to the technical field of glass fiber composite materials, and particularly relates to a flame-retardant, heat-insulating and sound-absorbing composite material and a preparation method thereof. By adding zirconium oxychloride, gadolinium nitrate and other materials, the flame retardant property of the composite material is enhanced, the inflammability of the composite material under a high-temperature condition is effectively reduced, and the safety of the material under an extreme condition is improved; the introduction of the phase change material is beneficial to heat management of the material, and heat can be absorbed and stored in a high-temperature environment, so that a good heat insulation effect is provided; the materials such as the modified glass fibers and the basalt fibers are added, and the fibers have good acoustic performance and can effectively reduce noise transmission, so that the sound absorption effect is improved; therefore, the mechanical property of the material is improved, the good durability and stability of the material are ensured, and the long-term reliability of the material is ensured.

The invention relates to the technical field of nylon materials, and discloses a low-moisture-absorption nylon composite material and a preparation method thereof. The nylon composite material prepared by the invention is prepared from the following raw materials in parts by weight: 40-50 parts of nylon 66, 35-55 parts of modified nylon 6, 25-35 parts of reinforcing filler, 0.5-2 parts of a lubricant and 0.5-1 part of an antioxidant, the nylon 66 / modified nylon composite material is prepared by taking nylon 66 and modified nylon 6 as substrate materials, adding auxiliaries such as reinforcing filler, mixing, extruding and granulating, the modified nylon 6 is introduced, so that the toughness of the composite material is improved, and the water absorption rate is reduced; due to the introduction of the reinforcing filler, the synergistic effect of halloysite and boron nitride can be utilized, the flame retardant property of the composite material is improved, and the water absorption rate is further reduced.

The utility model provides a range hood and a kitchen system including the same, the range hood comprises a smoke collecting hood, the air inlet surface of the smoke collecting hood facing a stove is provided with a main air inlet area and at least one auxiliary air inlet area, the suction force of the main air inlet area is greater than that of each auxiliary air inlet area, and the suction force of each auxiliary air inlet area is greater than that of the main air inlet area. The at least one auxiliary air inlet area is located at one end of the main air inlet area, the range hood further comprises a partition part, the partition part is located in the exhaust fume collecting hood and covers the main air inlet area so as to separate the main air inlet area from the auxiliary air inlet areas, and an outlet is formed in at least one surface, away from the auxiliary air inlet area, of the partition part. The suction force of the main air inlet area is larger than that of each auxiliary air inlet area, so that the air inlet amount of the main air inlet area is larger than that of the auxiliary air inlet areas. By adopting the structural form, the airflow of the auxiliary air inlet area is not influenced by the airflow of the main air inlet area, so that the problem that the instantaneous resistance at the inlet of the auxiliary air inlet area is instantaneously increased is solved, and the lampblack can be prevented from escaping.

The invention relates to the technical field of layered product materials, and discloses a polymer-ceramic composite dielectric material, a preparation method and application of the polymer-ceramic composite dielectric material to a capacitor. The preparation method of the polymer-ceramic composite dielectric material comprises the following steps: adding composite modified pullulan and modified composite nanosheets into N, N-dimethylformamide to obtain a mixed solution A, and casting to form a film to obtain an outer film; adding the composite modified pullulan and the modified ceramic-based composite filler into N, N-dimethylformamide to obtain a mixed solution B, and pouring to form a film to obtain an inner-layer film; and clamping the inner-layer film between the outer-layer films, carrying out hot press molding, and cooling to obtain the polymer-ceramic composite dielectric material with a three-layer structure. The polymer-ceramic composite dielectric material provided by the invention has good dielectric property, energy storage property and heat resistance, and can be applied to capacitors.

The utility model discloses a novel wooden activated carbon production device. The novel wooden activated carbon production device comprises a feeding bin, a mixing and extruding mechanism, a liquid inlet mechanism and a driving mechanism, the material stirring and extruding mechanism comprises a material conveying barrel, a rotating shaft, a plurality of stirring rods, a plurality of material pushing blades and a spiral blade; the feeding bin is communicated with an inner cavity at one end of the conveying barrel; the rotating shaft is rotationally connected with the conveying barrel, and the rotating shaft is driven by a driving mechanism to rotate; the stirring rods are fixed on the rotating shaft close to one side of the feeding bin at intervals, and the spiral blades are fixed on the rotating shaft far away from one side of the feeding bin; a liquid conveying hole is formed in the rotating shaft; a liquid guide hole communicated with the liquid conveying hole is formed in the stirring rod, and a plurality of liquid spraying holes communicated with the liquid guide hole are formed in the side wall of the stirring rod; the liquid inlet mechanism comprises a liquid inlet pipe and a rotary connector; one end of the liquid inlet pipe is communicated with the binder, and the other end of the liquid inlet pipe is communicated with the liquid conveying hole through the rotary connector; and the material pushing blades are fixed on the rotating shaft between the adjacent stirring rods.

The invention discloses a thermal barrier coating resistant to high-temperature oxidation and a preparation method thereof, and relates to the technical field of thermal barrier coating materials. According to the preparation method, a NiCoCrAlYHfRu coated coating is prepared on a high-temperature alloy by adopting arc ion plating equipment, and a YSZ / LaZrCeO ceramic surface layer is prepared by adopting electron beam physical vapor deposition equipment. The thermal barrier coating prepared through the technology has a unique columnar crystal structure and meanwhile has good thermal cycle performance. Finally, the anti-oxidation and anti-corrosion requirements of the turbine blade can be met; and the process is simple, industrial production is easy to achieve, and the composite coating is excellent in performance, has application prospects and is suitable for the high-temperature alloy.

The invention belongs to the technical field of aviation, and particularly relates to a supersonic civil aircraft layout. According to the supersonic civil aircraft layout, the engine nacelle is installed above the rear fuselage between the wing and the horizontal tail, the lower portion of the air inlet is shielded by the rear edge of the wing, the lower portion of the air outlet is shielded by the front edge of the horizontal tail, shock waves generated by the engine are prevented from spreading to the ground through the shielding effect of the wing and the horizontal tail, and the ground sound explosion loudness of the aircraft is effectively reduced; the engine and the hanger can perform small-angle pitching deflection around the rotating shaft in the hanger, so that the mounting angle of the engine is adjusted, and the propulsive efficiency of the engine under the non-design-point working condition is improved; the horizontal tail tip can be folded upwards to provide additional vertical tail capacity during supersonic cruising, loss of vertical tail efficiency during supersonic cruising is made up, and expansion waves generated by an engine exhaust nozzle and a horizontal tail are prevented from spreading to the ground. And the wingtip is put down during low-speed take-off and landing, so that a larger horizontal tail area is ensured, and the trimming requirement of a take-off and landing structure is met.

The invention relates to a regulation and control method and system for mine fireproof doors, a terminal and a medium, and belongs to the technical field of mine fireproofing. The regulation and control method comprises the steps that sensing data sent by sensors around each fireproof door are received; according to the multiple sets of sensing data, whether a fire occurs in the mine or not is judged; if yes, determining a target fireproof door according to the fire spreading area; acquiring personnel position information of workers around the target fireproof door; based on the personnel position information, whether a worker is on a fire spreading path and is located between the target fireproof door and a fire spreading boundary is judged; if yes, the closing degree of the target fireproof door is controlled according to the spreading speed of the fire; if not, the closing degree of the target fireproof door is controlled according to the fire behavior of the fire. The intelligent monitoring management system has the beneficial effect that intelligent monitoring management of the fireproof door can be conveniently realized according to the field environment.

The invention belongs to the field of lithium-sulfur secondary batteries, and relates to a lithium-sulfur battery positive electrode and a preparation method thereof.The positive electrode active layer of the positive electrode comprises an active sulfur-graphene composite material, a conductive agent and polyvinylidene fluoride; the active sulfur is sublimed sulfur particles of which the surfaces are loaded with cerium single atoms. The cerium monatomic catalyst can form strong chemical bonding with polysulfide, and shuttling of the polysulfide can be effectively inhibited in cooperation with a physical barrier of graphene; the cerium has relatively high selective adsorption on long-chain polysulfide, the redox reaction energy barrier of the polysulfide is reduced, the utilization rate of sulfur is improved, the loss of active substances is reduced, and the coulombic efficiency, the cycle stability and the charge-discharge efficiency of the battery are improved; the conductivity of sulfur can be enhanced, rapid transmission of electrons in the whole electrode is promoted, and the rate capability of the battery is improved; meanwhile, cerium single atoms can form a stable coordination structure on the surface of sulfur, so that the volume expansion of sulfur in the charge-discharge process is limited, and the cycle life of the battery is prolonged.

The invention relates to the technical field of high polymer materials, and discloses a flame-retardant fireproof phenolic resin laminated board and a preparation method thereof.The preparation method comprises the steps that phenolic resin and absolute ethyl alcohol are mixed, then a paper-based material is subjected to infiltration treatment with the prepared mixed solution and dried, and prepreg is obtained; carrying out stacking hot press molding treatment on the prepreg to obtain a phenolic resin laminated board; and spraying and drying the flame-retardant liquid on the surface of the phenolic resin laminated board to obtain the flame-retardant fireproof phenolic resin laminated board. The phenolic resin laminated board disclosed by the invention has relatively good flame-retardant and fireproof effects.

The invention provides an environment-friendly anti-freezing dust suppressant and a preparation method thereof. The environment-friendly anti-freezing dust suppressant comprises a surfactant, a binder, an anti-freezing agent, a corrosion inhibitor, a green tea extract and a solvent. According to the environment-friendly anti-freezing dust suppressant, the natural component green tea extract is used as an environment-friendly additive, the environment-friendly performance and biodegradability of the dust suppressant can be effectively improved, the green tea extract and other components in the environment-friendly anti-freezing dust suppressant cooperate with each other, the anti-freezing performance of the dust suppressant is effectively improved, and the dust suppressant has a good anti-freezing effect. The dust suppressant can keep a good dust suppression effect under a low-temperature condition, the problems of water resource waste and road icing are avoided, and the risk of environmental pollution can be reduced. The environment-friendly anti-freezing dust suppressant disclosed by the invention is used for removing dust, can be effectively sprayed and cover an area under a cold condition, effectively prevents dust from raising and diffusing, and realizes effective treatment on the problem of dusting in winter.

The invention relates to the technical field of fireproof roller shutters, in particular to a fireproof roller shutter with basalt fiber cloth, which comprises fireproof roller shutter cloth, the fireproof roller shutter cloth is arranged in multiple layers, the thickness of the fireproof roller shutter cloth is less than or equal to 0.5 mm, the fireproof roller shutter cloth comprises a fireproof heat insulation layer, and the fireproof heat insulation layer is formed by interweaving and blending basalt fibers and aluminum silicate refractory fibers. The thickness of the fireproof heat insulation layer is 0.1 mm to 0.3 mm; the fireproof roller shutter cloth further comprises a fire receiving surface layer and a heat radiation prevention layer, the fire receiving surface layer is combined with the fireproof heat insulation layer, the side, away from the fire receiving surface layer, of the fireproof heat insulation layer is combined with the heat radiation prevention layer, the fire receiving surface layer, the fireproof heat insulation layer and the heat radiation prevention layer are combined through fireproof adhesive, and the thickness of the fire receiving surface layer and the thickness of the heat radiation prevention layer range from 0.1 mm to 0.3 mm.

The invention discloses an inorganic fiber composite board adhesive with high durability and environmental protection performance and a method, according to the adhesive, rock wool fiber powder and surface modified nanoparticles are combined to form an inorganic filler, a synergistic effect is achieved on a microstructure, and the hardness and wear resistance of the adhesive and the stability of a composite board are effectively improved. By adding the quaternary ammonium salt catalyst, the curing temperature is remarkably reduced, the production efficiency is improved, and complex environments are adapted. And the phosphorus-nitrogen composite flame retardant is adopted, so that the fireproof performance of the composite board is enhanced, a compact carbonized layer is formed in case of fire, and flame diffusion is prevented. And the internal structure of the plate is uniform and stable through the section-by-section heating and pressurizing process, and high-precision application is achieved.

The invention discloses a soundproof door bottom sealer and a soundproof door applying the soundproof door bottom sealer, the soundproof door bottom sealer comprises a bottom cover plate, a profile is mounted in the bottom cover plate, and the profile is used for mounting a sealing piece; the bottom cover plate is provided with a plurality of sealing pieces, the sealing pieces extend to the outer side of the bottom cover plate from the sectional material, and when the bottom cover plate moves downwards to be attached to the ground, the sealing pieces are extruded by the ground to deform, and the sealing effect is achieved. The sealing strip is ensured to be tightly attached to the doorsill stone so as to prevent sound transmission, so that the sealing and sound insulation effects are better, the sealing strip is particularly suitable for being installed at the place where a lower doorsill cannot be arranged, the section and the bottom cover plate are connected more stably through the graphite pad, the service life is prolonged, and the section and the bottom cover plate are fixed without screws or rivets. And the sectional material can be conveniently detached from the bottom cover plate, so that the sectional material can be conveniently cleaned.

The present application relates to the technical field of flame-retardant pipes, and in particular to a low-temperature impact-resistant flame-retardant silicon core pipe and a preparation method thereof. The low-temperature impact-resistant flame-retardant silicon core pipe comprises an inner layer and an outer layer, and the outer layer comprises the following raw materials in parts by weight: 70-90 parts of high-density polyethylene resin, 15-25 parts of star-shaped SBS, 3-5 parts of maleic anhydride grafted high-density polyethylene, 6-10 parts of inorganic flame retardant, 10-15 parts of elastic flame-retardant microspheres, 0.1-0.5 parts of antioxidant, 0.4-0.8 parts of antibacterial agent, 2-4 parts of carbon fiber, 1-3 parts of dispersant and 1-3 parts of silane coupling agent; the invention has the advantages of improving the mechanical properties of the pipe while improving its flame retardant properties.

The present invention discloses a method and system for realizing unified threat management in a heterogeneous network, and relates to the technical field of unified threat management, including calculating the real-time traffic anomaly coefficient and historical threat risk coefficient of each network or device, and calculating the network risk coefficient of each network or device; parsing the header of a data packet entering the unified threat management, identifying abnormal data packets, counting the number of abnormal data packets per unit time of each network or device, and deeply analyzing the content of the abnormal data packets, and counting the number of malicious data packets per unit time of each network or device; calculating the real-time carrying capacity of the unified threat management according to the real-time average traffic and the number of abnormal data packets of all networks or devices, issuing a data communication restriction warning, calculating the communication risk index of each network or device, and limiting the communication of the corresponding network or device. The communication of high-risk networks or devices can be automatically restricted to prevent malicious traffic from spreading in the network.

The application discloses a serological method for identifying Brucella A19-DeltaVirB12 vaccine immunized animals and infected animals, and belongs to the technical field of veterinary vaccine detection, comprising the step of identifying the antibodies of the serum by using the NH-AGID method. The method helps to perfect the animal Brucella A19-DeltaVirB12 vaccine prevention and control technical system, makes up for the short board that the A19-DeltaVirB12 vaccine immunized animals cannot be identified, and provides technical support for realizing the precise prevention and control of bovine brucellosis. The application of the method will accelerate the application of the Brucella A19-DeltaVirB12 vaccine to replace the traditional A19 vaccine, and opens a new milestone for the prevention and control of Brucella.

The invention provides high-light-transmittance polymethyl methacrylate resin and a preparation method thereof, and belongs to the technical field of high polymer materials. Comprising the following steps: carrying out catalytic cracking on waste polymethyl methacrylate resin, collecting a high-purity methyl methacrylate regenerated monomer I, uniformly mixing the high-purity methyl methacrylate regenerated monomer I with a methyl methacrylate monomer II, a comonomer III, a modifier, an initiator and a chain transfer agent serving as raw materials, and sequentially carrying out primary polymerization, secondary polymerization and tertiary polymerization, so as to obtain the polymethyl methacrylate copolymer. And then inputting the materials into a devolatilization extruder for devolatilization, extrusion molding and granulation to prepare the high-light-transmittance methyl methacrylate resin. The prepared light-transmittance polymethyl methacrylate resin is high in light transmittance, good in toughness and excellent in mechanical property, the application of the light-transmittance polymethyl methacrylate resin is greatly widened, and the light-transmittance polymethyl methacrylate resin has a wide application prospect.

The utility model discloses a high-pressure sealing structure of high-temperature sterilization equipment for edible mushroom production in the field of high-pressure sealing, which comprises a sealing component, the sealing component comprises a sealing cover, the upper surface of the sealing cover is movably connected with a fixing bolt, and the outer surface of the sealing cover is fixedly connected with a first sealing ring; a second sealing ring is fixedly connected to the outer surface of the sealing cover, a spring column in the anti-leakage assembly is arranged, and when the second sealing ring extrudes the surface of a connecting pad, the spring column can eject a connecting plate upwards, so that the spring column adapts to size changes through elastic deformation of the spring column, and pressure on a sealing component is always kept; the sealing surfaces are tightly attached, so that the good sealing effect is maintained, meanwhile, pressure distribution can be automatically adjusted according to the actual conditions of the sealing surfaces, the problem that sealing is not tight due to the fact that local pressure is too high or too low is solved, and sealing reliability is improved.

This invention discloses an antioxidant porous TiAl alloy, the raw materials of which include: a mixed powder, nano-B4C, nano-NiO, and nano-SiO2. The mixed powder comprises TiH2 powder and aluminum powder; the Ti content in the mixed powder is 51-53 wt%; the weight ratio of nano-B4C, nano-NiO, and nano-SiO2 to the mixed powder is 2-3:0.5-1.5:2-3:100. This invention also discloses a method for preparing the above-mentioned antioxidant porous TiAl alloy, comprising the following steps: mixing TiH2 powder and aluminum powder to obtain a mixed powder, then adding nano-B4C, nano-NiO, and nano-SiO2 and mixing, pressing into shape, vacuum sintering, soaking in an alkaline solution, and washing with water to obtain the antioxidant porous TiAl alloy. This invention also discloses the application of the above-mentioned antioxidant porous TiAl alloy in filtering high-temperature flue gas. This invention exhibits excellent antioxidant and filtration performance.

The invention relates to an anti-corrosion composition, a coating, a coating and an anode steel claw. The anti-corrosion composition is prepared from the following raw materials: hard clay, kaolin, potassium fluoroaluminate, sodium hexametaphosphate, borax, silica powder and quartz sand. In the anti-corrosion composition, the content of the hard clay is 55 parts by weight to 70 parts by weight, the content of the kaolin is 5 parts by weight to 15 parts by weight, the content of the potassium fluoroaluminate is 5 parts by weight to 10 parts by weight, the content of the sodium hexametaphosphate is 5 parts by weight to 10 parts by weight, the content of the borax is 2 parts by weight to 8 parts by weight, the content of the silica powder is 1 part by weight to 6 parts by weight, and the content of the quartz sand is 1 part by weight to 6 parts by weight. The anti-corrosion composition provided by the invention has excellent high-temperature gas corrosion resistance and thermal shock resistance, so that the anti-corrosion composition is used as a raw material of a coating, and the coating can play a good role in protecting the anode steel claw in aluminum electrolysis.

The invention discloses a masterbatch with flame retardant function and a preparation method thereof, belonging to the field of polymer materials. The masterbatch comprises the following raw materials in parts by weight: 100-150 parts of linear low-density polyethylene, 15-25 parts of modified fillers, 2-5 parts of dicumyl peroxide and 10-20 parts of toner. When the masterbatch is burned, the organic silicon structure on the surface of the modified filler can form a silicon-carbon layer containing titanium dioxide. Meanwhile, the modifier contains S, P, B and N elements, which can improve the compactness of the carbon layer. The masterbatch contains an aluminum phosphate structure inside, which absorbs heat during high-temperature decomposition to delay combustion and generate polyphosphates. The polyphosphates can inhibit the generation of smoke and toxic gases. The modified filler has a zinc organic framework inside, which releases carbon dioxide and water vapor under high temperature conditions to reduce oxygen concentration, and forms a porous carbon layer containing zinc oxide inside, which can capture smoke and toxic gases.

The invention discloses an adenovirus vector carrying a trichina CLP gene and a construction method and application of the adenovirus vector, and belongs to the technical field of genetic engineering and recombinant virus vaccines. In order to solve the technical problems that an existing trichina vaccine needs to be inoculated 2-3 times and does not have long-term effectiveness, trichina CLP protein is used as an antigen, a gene for coding the CLP protein is integrated into an adenovirus vector through a gene recombination technology, and a recombinant adenovirus vector is obtained; the recombinant adenovirus vector is transfected to mammalian cells, the recombinant adenovirus is obtained through the processes of packaging, amplification and the like, and the recombinant adenovirus is identified through a plurality of experiments; in addition, immune animal experiments prove that the effect of effectively resisting trichinella spiralis infection can be achieved by using the recombinant adenovirus rAd5TsCLP to immunize mice. The invention lays a foundation for the subsequent research of trichinosis vaccines.

The invention discloses a dissimilar metal laser welding method of titanium alloy and stainless steel, belonging to the field of metal welding technology. Specifically, the following steps are included: step S1: material preparation, preparing titanium alloy plate, stainless steel plate, bronze plate and nickel-based high-temperature alloy plate; step S2: polishing and cleaning, polishing and cleaning titanium alloy plate, stainless steel plate, bronze plate and nickel-based high-temperature alloy plate; step S3: arranging and placing, arranging titanium alloy plate, stainless steel plate, bronze plate and nickel-based high-temperature alloy plate in the order of titanium alloy plate-bronze plate-nickel-based high-temperature alloy plate-stainless steel plate; step S4: welding, step S41: welding bronze plate and nickel-based high-temperature alloy plate; step S42: welding titanium alloy plate and part of bronze plate; step S43: welding nickel-based high-temperature alloy plate and stainless steel plate. The strength of the welding joint between titanium alloy plate and stainless steel plate is high.

The present invention relates to the technical field of adhesive films, and in particular to an acid-removing EVA film for solar cells and a preparation method thereof, comprising the following raw materials: EVA resin, a main cross-linking agent, an auxiliary cross-linking agent, an amino anti-PID composite filler, a composite hydrotalcite acid scavenger, a lubricant, an ultraviolet absorber, a light stabilizer, an antioxidant and a coupling agent. The present invention inserts phosphate ions between the layers of magnesium-aluminum hydrotalcite and loads nano titanium dioxide particles on the surface of magnesium-aluminum hydrotalcite, so that the composite hydrotalcite acid scavenger can effectively adsorb and capture acetic acid released from the EVA film, thereby achieving the purpose of effective acid removal and acid suppression; through the preparation and amino modification of the anti-PID composite filler, the amino anti-PID composite filler can improve the mechanical properties and anti-PID ability of the EVA film, and can also capture and neutralize the free acetic acid in the EVA film into salt, further playing the role of acid removal, and improving the aging resistance of the EVA film.

The utility model discloses a matte veneer which comprises a blank base plate, a plurality of grooves are formed in the blank base plate, a first adhesion layer is arranged on the blank base plate, and primer is smeared on the first adhesion layer. The fireproof matt veneer has the advantages that the fireproof coating is arranged on the surface layer of the matt layer, the fireproof coating is formed by coating water-based expansive fireproof paint on the matt layer, the gloss of the fireproof coating is matt, the using effect of the matt veneer cannot be affected, and when a fire breaks out, the fireproof coating can be prevented from being damaged. The fireproof coating on the surface of the matte layer can rapidly expand to form a compact protection layer when encountering a fire source, the matte veneer is prevented from being ignited, fire spreading can be effectively prevented, and fire expansion can be avoided.