68results about How to "Anti-acid and anti-alkali" patented technology

The invention discloses a production method of electronic-grade sulphuric acid. The production method comprises the following steps in sequence: industrial-grade sulfur trioxide raw materials are provided and placed into a raw material storage tank; the sulfur trioxide raw materials are conveyed into an evaporator tank; the evaporator tank is heated; sulfur trioxide steam generated by heating enters into an absorption tower through a filter; the sulfur trioxide steam is absorbed by electronic-grade ultrapure water in the absorption tower, the concentration of absorption liquid is controlled, and the absorbed solution enters into a degassing tower after cooled by a cooler; air stripping is performed on a sulfuric acid solution by the degassing tower through compressed air; the sulfuric acid solution enters into a finished product storage tank after cooled; finally, the final electronic-grade sulphuric acid applied to the integrated circuit industry is obtained after ultrafiltration to remove particles. The operating temperature of the technology, compared with a conventional technology, is lower than 120 DEG C. Therefore, the technology is safer than a high-temperature distillation technology which takes industrial-grade sulfuric acid as raw material, and in addition, compared with adopting equipment made of quartz glass, non-pollution to electronic-grade sulphuric acid products is guaranteed from equipment material.

The invention relates to the technical field of electroplating, and particularly relates to a preparation method of a nickel-polytetrafluoroethylene coating. According to the invention, nickel is combined with polytetrafluoroethylene, a fluorinated ethylene-propylene copolymer, a perfluoroalkoxy copolymer and other assistants to be used as an electroplating solution and used for electroplating under certain conditions. The invention can be widely applied to various base materials such as steel, copper alloys, wrought aluminum, cast iron, stainless steel and the like, and can be also perfectly used on various injection molding materials except pure rubber, such as silica gel, TPO0, PVC (polyvinyl chloride) and the like. The coating is favorable in wear resistance and non-corrosibility, has weldability and hardenability, and causes no negative effect on the surfaces of other molds.

The invention discloses a window screening capable of releasing anion and filtering particle matter (PM) 2.5 particles. The window screening comprises a grid cloth with the aperture of 1-3mm and a microfiltration membrane, wherein the grid cloth provides a framework supporting function and is made from any one of polyester, polypropylene, acrylic fibers 6, acrylic fibers, high strength glass fiber, and inflaming retarding aramid fiber, the microfiltration membrane is used for air ventilation and filtration and made of a Teflon material, the aperture of the microfiltration membrane is 0.2-5.0mm, the thickness of the microfiltration membrane is 0.01-0.05mm, the grid cloth and the microfiltration membrane are laminated, the grid cloth faces towards the indoor, and the microfiltration membrane faces the outdoor. The window screening capable of releasing anion and filtering PM 2.5 particles has functions of existing window screenings and is capable of filtering fine particle pollutants in the air and meeting actual use requirements.

The invention discloses an omni-directional rotary zipper head. The zipper head comprises a zipper head body, a multi-rail structure, a locking structure, a spring structure and a pulling piece, the pulling piece is provided with two clamping connection end portions and connected onto the multi-rail structure in a clamping mode, the zipper head body comprises an upper plate and a lower plate, the multi-rail structure and the zipper head body are installed in a perpendicularly crossing mode, the multi-rail structure comprises rails in three directions, the locking structure is arranged between the zipper head body and the multi-rail structure, the spring structure is arranged between the locking structure and the zipper head body, the zipper head body comprises an introduction port and a meshing port, a front baffle plate is arranged at the front end of the zipper head body, and the introduction port is divided symmetrically and equally by the front baffle plate. According to the zipper head, omni-directional 360-degree rotation of the pulling piece can be achieved through the multi-rail structure, and modified polycarbonate composite material has the performance of corrosion resistance and high and low temperature resistance, so that smooth use of the zipper head in a double-faced zipper is guaranteed.

The invention discloses a cement reinforcer which comprises the following components in parts by weight: 8-18 parts of zeolite powder, 15-22 parts of precipitated barium sulfate, 8-12 parts of talcum powder, 30-38 parts of diatomite powder, 13-21 parts of borax, 9-14 parts of acrylamide, 9-21 parts of calcium lignosulphonate, 4-7 parts of sodium acetate, 9-18 parts of ethylene glycol, 2-4 parts of urea, and 48-62 parts of water. The relative density of the cement reinforcer disclosed by the invention is 1.12-1.21, which is much smaller than the density of cement paste, so that an anti-fluid-channeling effect can be achieved on the premise of not changing the density of cement paste; according to the invention, composite cement concrete has the functions of heat insulation, heat preservation, insulation, resistance, and the like, so that artificial maintenance can be omitted; because after the reinforcer is added, the reinforcer is expanded and produces a dynamic reverse reaction to the solidification of cement, duo to the expansion operation, the strength of cement and the cementing strength of cement with other media are significantly improved, and cement also can be saved by 28-36%; and according to the invention, the heat produced in the process of solidification caused by a chemical reaction between cement and water is reduced by about 50%, thereby achieving an anti-crack effect.

The invention provides a graphene electric heating fabric provided with a magnet. The graphene electric heating fabric comprises at least a graphene fabric body, two electrodes, at least a power supply connecting member, a plurality of permanent magnets, and at least an insulation waterproof layer. The graphene fabric body is formed by graphene fibers. The two electrodes are fixedly disposed on the graphene fabric body, and are connected with the power supply connecting member. The surface of the graphene fabric body is fixedly provided with the plurality of permanent magnets, and the insulation waterproof layer is disposed on the outer surface of the graphene fabric body and the outer surfaces of the electrodes in a covered manner. Compared with the prior art, the graphene electric heating fabric provided with the magnet has advantages of antibiotic and bacteriostatic effect, far-infrared health care warm-keeping effect, magnetotherapy, light weight, good flexibility, uniform heating, high heating efficiency, small energy consumption, recyclability, comfortable touch feeling, and good service performance.

The invention is applicable to PEEK (polyether-ether-ketone) composite material applicable to 3D (three-dimensional) printing. The composite material comprises, by weight, 3-5 parts of nano-hydroxyapatite, 5-7 parts of nano-Si3N4, 60-90 parts of polyether-ether-ketone, 18-20 parts of polytetrafluoroethylene, 20-25 parts of carbon fibers and 0.1-0.3 part of antioxidants. The composite material is perfect in structure, high in hardness and good in abrasion resistance, a 3D printing product by the material can be widely applied to repairing and replacing of biological hard tissues, and the composite material is an ideal alternative material of human skeletons.

The invention discloses an overpass bridge design construction method applicable to incremental launching method construction and belongs to the technical field of variable cross-section girder body design construction. Main construction operation can be away from a spanned space, it is guaranteed that an existing railway, highway or city road is not interfered by construction, and underbridge safety is ensured, and the overpass bridge design construction method is an alternative scheme when rotation construction is not suitable. The design construction method comprises the steps that temporary tubular pile foundation treatment is conducted, and sliding plate foundations, sliding layers and incremental launching back girders jointed with bridge pier foundations enable a jointed foundation composed of foundation connection girders, bridge bearing table foundations and bridge girders to drive a variable cross-section girder body to conduct simultaneous incremental launching to further achieve being folded with an overline on the other side. The method is suitable for an overpass bridge which spans the railway, the highway or the city road and located in a narrow site with dense city buildings and without rotation construction conditions.

The invention discloses a lithium ion battery anode plate containing a conductive coating. The lithium ion battery anode plate comprises a negative current collector and a conductive coating used forcoating the negative current collector, wherein the conductive coating is coated with anode slurry. The manufacturing process of the anode slurry comprises the steps of: 1) taking the anode slurry rawmaterials as graphite, sodium hydroxymethyl cellulose and styrene butadiene rubber, and stirring and mixing the anode slurry raw materials with ionized water according to the weight ratio of 1:1 to obtain a mixed solution; 2) adding a conductive agent into the mixed solution obtained in the step 2 for low-speed stirring to obtain a first mixed material; and 3) adding a thickening agent into the first mixed material obtained in the step 2, and stirring the mixture at a low speed to prepare the anode slurry. According to the invention, the conductive coating is coated between the current collector and the anode slurry, so that the viscosity of the pole piece is improved, and the conductivity is enhanced.

The invention belongs to the technical field of protective films. The invention relates to a protective film material, in particular to a high-temperature-resistant stable protective film material anda preparation method thereof. The problem that an existing protective film is poor in high-temperature resistance is solved. According to the following technical scheme, the composition comprises thefollowing raw materials in parts by weight: 30-50 parts of polyethylene, 15-20 parts of calcium carbonate, 7-12 parts of plasticizer, 10 to 15 parts of polyvinyl chloride resin; 10-15 parts of epoxyresin, 2-7 parts of nano-silica, 1-6 parts of an antioxidant, 5-11 parts of polytetrafluoroethylene, 5-11 parts of acrylamide, 2-8 parts of magnesium stearate, 1-7 parts of polyurethane, 10-15 parts of polyetherimide, 5-10 parts of polyolefin, 1-6 parts of a heat stabilizer, 2-7 parts of polyester fibers, 1-6 parts of a scratch-resistant agent and 1-6 parts of a wear-resistant agent. The high temperature resistance can be effectively improved, the service life is prolonged, the strength is good, scratch resistance and wear resistance are achieved, and the preparation method is simple.

The invention discloses a recyclable coated aluminum alloy template and a preparation method thereof, and relates to the technical field of buildings. The coated aluminum alloy template is a three-layer structure with an aluminum alloy plate as a substrate, with a porous alloy as a middle layer and with a plastic film layer as a surface layer, wherein the thickness of the middle layer is 1-2 mm, and the thickness of the plastic film layer is 2-3 mm. The porous alloy is formed by filling a sponge framework with a nickel-copper alloy, wherein the sponge framework is an aluminum nitride framework. The prepared coated aluminum alloy template is green and environmentally friendly, has excellent corrosion resistance and can endure corrosion of cement, so that cement can be easily separated froma building aluminum alloy template, recycling of the building aluminum alloy template is facilitated, and cost is effectively saved.

The invention belongs to the field of floors, in particular to a wood-plastic composite floor and a preparation method thereof. Aiming at solving the problems of relatively short service life caused by relatively poor wear resistance and scratch resistance of existing wood-plastic composite floors, the wood-plastic composite floor provided by the invention is characterized by being prepared from the following raw materials in parts by weight: 30 to 50 parts of PVC resin, 40 to 45 parts of wood flour, 5 to 10 parts of a binder, 5 to 10 parts of a modifier, 6 to 12 parts of a plasticizer, 7 to 12 parts of a flame retardant, 15 to 20 parts of composite fiber, 15 to 25 parts of polyester fiber, 20 to 25 parts of bamboo charcoal fiber, 20 to 25 parts of carbon rubber, 7 to 11 parts of hollow microspheres, 8 to 13 parts of polytetrafluoroethylene, 11 to 16 parts of wear-resistant rubber, and 9 to 14 parts of polypropylene fiber. According to the wood-plastic composite floor provided by the invention, relatively good wear resistance is realized, the strength is improved at the same time, the scratch-resisting effect is good, the flame-retarding effect is good, the service life can be prolonged, and the preparation method is simple.

Raw paper of positioning paper is prepared from following raw materials: long-fiber wood pulp, hemp pulp, chemical fibers, a wet-strength agent, coating latex and an extract from aspen buds. A production method includes the steps of pulping treatment, addition of the wet-strength agent, papermaking, coating treatment, drying and cutting. The raw paper is high in quality, is high in strength, toughness, delamination resistant strength and anti-tear performance, is excellent in softness and size stability, has the performance of resisting acid, alkali and high-temperature, and has excellent binding strength to different sheet materials.

The invention discloses a tail gas dust collector for basalt fibers, which comprises an admission pipe, a cooling device, a first dust collection module, a second dust collection module, an escape pipe, a water jacket, a water inlet pipe and a water outlet pipe, wherein the water jacket is arranged in the cooling device, and the water inlet pipe and the water outlet pipe are connected with the cooling device. The tail gas dust collector for the basalt fibers also comprises connecting pipes and a flange, wherein the connecting pipes are respectively connected between the cooling device and the first dust collection module and between the first dust collection module and the second dust collection module. According to the tail gas dust collector for the basalt fibers, by adopting the high temperature-resistant basalt fibers and a grade dust collection mode, fine particles in tail gas can be effectively removed, and thereby, the effect of purifying the tail gas and improving the air quality is achieved.

The invention provides a blended and interwoven fabric as well as a preparation method thereof, and solves the technical problems that the conventional interwoven fabric does not have the functions of resisting acids, alkalis, static electricity and high-low temperature, can only be utilized in a simple environment, is low in utilization range and has no preparation methods. The blended and interwoven fabric comprises a base fabric layer, wherein protective layers are arrange on both sides of the base fabric layer; each protective layer comprises the following components in parts by weight: 40-60 parts of a polytetrafluoroethylene concentrated dispersion solution, 2-4 parts of a cross-linking agent, 3-5 parts of an anti-static agent and 0.6-1 part of an anti-oxidant. The blended and interwoven fabric has the advantages of being wide in utilization range and high in quality.

The invention provides a communication optical cable for pipeline leakage detection. The communication optical cable includes an outer protective layer, a data transmission cable, a temperature testing cable, and a live wire cable, the outer protective layer coats the data transmission cable, the temperature testing cable, and the power supply cable core, the temperature testing cable is a detection type multi-mode fiber, one end of the live wire cable is connected with an external power supply device, the other end of the live wire cable is connected with an external detection instrument, one end of the data transmission cable is connected with an external detection instrument, the other end of the data transmission cable is connected with an external data central processing unit, one end of the temperature testing cable is connected with the external detection instrument, and the other end of the temperature testing cable is fixed on an external wiring device via a tail fiber. The temperature testing cable and the communication optical cable are integrated for use, so that the structure is simplified, the cost is maximally reduced, and the signal transmission efficiency is improved.

The invention relates to a method for producing a liquid wallpaper coating, which comprises the following steps of: mixing and stirring 35 to 45 mass percent of water, 30 to 40 mass percent of styrene-acrylate emulsion, and 8 to 13 mass percent of ultrafine wollastonite powder to form solution; and respectively adding 1 to 3 mass percent of film-forming aid, 4 to 6 mass percent of pearl powder, and 6 to 10 mass percent of thickening agent into the solution and uniformly stirring the solution. The invention has the advantages that: the produced liquid coating has acid and alkali resistance, wear resistance, impact resistance, high oil resistance, and self-drying property at room temperature.

The invention belongs to the field of outdoor backpacks and manufacturing processes thereof and discloses a functional fabric for the outdoor backpacks and a manufacturing process of the functional fabric for the outdoor backpacks. The functional fabric is prepared from, by weight, 50-80 parts of basic fibers, 110-200 parts of fireproof fibers, 100-180 parts of wear-proof fibers and 90-155 parts of PTFE (polytetrafluoroethylene) microparticles. The manufacturing process includes steps of raw material preparation, yarn spinning, dyeing, weaving, impregnating, drying, sintering and the like. Since the provided fabric raw materials include the fireproof fibers, the wear-proof fibers and the PTFE microparticles, the wear-proof fibers can make up shortcomings of the fireproof fibers, and strength and wear resistance of the fabric are greatly improved on the basis of normal fabrics; by adoption of the appropriate process for manufacturing the fabric, evident effective fireproof, wear-proof and waterproof performances of the fabric are achieved, the adoption rate of the fabric applied to the outdoor backpacks is further increased, the use value of the outdoor backpacks made of the fabric is increased, and market competitiveness is improved.

The invention discloses a liquid pumping system of a piston type slurry pump with a circulating cleaning device. The liquid pumping system comprises a piston rod, a piston, a piston pipe, a valve box body, a piston pipe mounting pipe, a liquid inlet pipe, a cleaning and lubricating device and a pump body; the piston rod comprises a piston rod left end part and a piston rod body which are transversely and coaxially arranged; the cleaning and lubricating device comprises a water suction pump; the water suction pump is arranged on the piston pipe mounting pipe or outside the piston pipe mounting pipe; a water tank and a sand settling box are arranged outside the piston pipe mounting pipe. According to the liquid pumping system of the piston type slurry pump with the circulating cleaning device, when the sand content in slurry is high and high pressure exists, liquid feeding and liquid discharging are smooth, the piston can also be automatically adjusted, the cleaning and lubricating device is adopted, the large-diameter slurry particles can be effectively prevented from being accumulated on the surface of the plunger, and the problem of sealing failure caused by frequent movement is solved.

The invention discloses an industrial trackball mouse. The industrial trackball mouse comprises a shell, a lubricating support ball seat, a trackball, a dustproof ring and an optical sensing assembly,the shell internally comprises a ball accommodating cavity, a circuit accommodating cavity and a light hole, and the ball accommodating cavity communicates with the circuit accommodating cavity through the light hole; the lubricating support ball seat is provided with a first round hole, the bottom end of the trackball is installed at the bottom of the ball accommodating cavity through the lubricating support ball seat, and the bottom end edge of the trackball protrudes downwards out of the first round hole of the lubricating support ball seat; the dustproof ring is provided with a second round hole, the top end of the trackball is installed at the top of the ball accommodating cavity through the dustproof ring, and the top end edge of the trackball protrudes upwards out of the second round hole of the dustproof ring; and the optical sensing assembly is installed in the circuit accommodating cavity. According to the industrial trackball mouse, the trackball is supported by a trackballseat to roll, and the position of the trackball is fixed by the dustproof ring, so that the trackball can roll at any mounting angle, and good control performance is provided for the trackball.

The invention discloses a combined piston sealing element, which relates to the technical field of sealing rings, specifically a cylinder, a hot cavity and a through hole, wherein a convex top cavityis arranged in the cylinder, a piston is connected in the convex top cavity, a micro small hole is formed in the top end of the convex top cavity, the hot cavity is arranged above the convex top cavity, a guide ring is arranged on the outer wall surface of the piston; an upper combined seal element is arranged below the guide ring; a lower combined seal element is arranged below the upper combinedseal element, the upper combined seal element and the lower combined seal element are respectively arranged in the outer wall surface of the piston, and the through hole is formed in the top end of the piston. According to the combined piston seal element, the cross section of a floating ring is a semi-rectangular barrel surface type under a working state, the lower edge of the working surface ofthe outer circle of the floating ring is in contact with the cylinder wall, and the lower edge of the inner circle of the ring is in contact with a C-shaped compensation bulge, so that the sealing performance is good, and the semi-rectangular angle is 7 degrees according to the standard.

The invention discloses an electrochemical reaction still with openings in two sides and a using method thereof. The reaction still comprises a first bottom cover, a first pressure plate, a first polytetrafluoroethylene inner container upper cover, a tank body, a polytetrafluoroethylene inner container, a second polytetrafluoroethylene inner container upper cover, a second pressure plate, a second bottom cover, an electronic conducting device and a four-point bending clamp. The device adopts the polytetrafluoroethylene inner container, has the characteristics of resisting acid and base and resisting the corrosion of various organic solvents, and provides conditions for simulating electrochemical corrosion behaviors under various conditions. The openings are formed in two ends of the tank body, electrode fixing threaded holes for connecting three electrodes are formed in the polytetrafluoroethylene inner container upper cover in one side and can be used for electrochemical tests, and the polytetrafluoroethylene inner container upper cover in the other side is provided with a water inlet, a water outlet and a pressure gage and can be used for injecting a reaction solution and carrying out pressure treatment. The device gives consideration to the electrochemical tests and coupon corrosion experiments which are effectively combined, and can be used for researching corrosion behaviors of metals under high temperature and high pressure environments.

The invention discloses a method for machining through holes and blind holes of multi-layer flexible board. The machining method comprises the steps that: the multilayer flexible board is baked for 40 min-60 min at the temperature of 120 DEG C-140 DEG C; a phenolic aldehyde base plate, the multi-layer flexible board and a cold punching cover plate are stacked from bottom to top to form a fixed package, and the fixed package is fixed at a preset positioning point; and a drill pin is used for drilling from the cold punching cover plate to the multi-layer flexible plate according to standard drilling parameters at the preset position of the fixed package, wherein the standard drilling parameters include the tool speed of the drill pin entering the multi-layer flexible board,the rotating speed of the drill pin in the multi-layer flexible board and the tool speed of the drill pin retreating from the multi-layer flexible board, wherein the tool speed of the drill pin entering the multi-layer flexible board is 0.7 m / min-0. 8 m / min, the rotating speed of the drill pin in the multi-layer flexible board is 60 Kr / min-70 Kr / min, and the tool speed of the drill pin retreating from the multi-layer flexible board is 5m / min-8m / min. The machining method for the blind holes of the multi-layer flexible board comprises the steps that: a copper window is formed in a copper layer of the multi-layer flexible board through a UV laser machine; and a base material layer is heated to a molten state by using a CO2 laser machine, and is gasified, so that blind holes can be formed. The flexible printed circuit board has high high-frequency signal transmission performance and high temperature resistance, so that the performance of a product formed by the matching methods of the invention is more stable and reliable.

The invention discloses a trackball seat and a trackball mounting and supporting structure. The trackball seat comprises an annular base, the annular base is provided with a first circular through hole, a lubricating supporting boss is arranged on the edge of the inner side, close to the upper end of the first circular through hole, of the annular base, the lubricating supporting boss is annular,is provided with a supporting circular through hole, and is provided with a horn-shaped supporting inclined face along the inner side of the upper end of the supporting circular through hole. According to the trackball seat, the horn-shaped supporting inclined face of the lubricating supporting boss is used for supporting the trackball to roll, so that the problem of high noise of the trackball isreduced and eliminated, the surface abrasion of the trackball is reduced and eliminated, and the service life of a trackball mouse is prolonged; and moreover, according to the trackball mounting supporting structure, the trackball seat is used for supporting the trackball to roll, and the upper cover is used for fixing the position of the trackball, so that the trackball can roll at any installation angle, and good control performance is provided for the trackball.

The invention discloses an electromagnetic valve for hematodialysis. The main structure of the electromagnetic valve comprises a valve body, and the valve body is provided with an inner cavity; a telescopic sliding iron core is installed in the inner cavity of the valve body, the upper end of the telescopic sliding iron core and a coil arranged on the top of the inner cavity are fixed, the lower end of the telescopic sliding iron core is connected with a sealing pad, and the sealing pad is driven to vertically move to control the valve to be switched on and switched off. The electromagnetic valve is low in power dissipation and small in size, has the good corrosion resistance, can not cause medium leakage and is easy to clean and operate and convenient to install, and an electromagnetic system is high in switching speed, response speed and efficiency.

The invention discloses a human povidone-iodine solution, which is prepared by the following formula: 5 to 10 kg of povidone-iodine, 0.5 to 1.0 kg of potassium iodide, 6 to 10 kg of betaine, 0.2 to 0.5 kg of D-panthenol, 30 to 65 kg of water and the balance of glycerol, and the total volume of the solution is 100 L. The preparation method comprises the following steps: dissolving, mixing and the like in a corrosion-resistant reaction kettle in corrosion-resistant stirring equipment at a certain stirring speed step by step. The human povidone-iodine solution is scientific and reasonable in formula composition and unique in process, has the effects of promoting wound healing and moistening skin, contains 0.5%-1.0% of effective iodine, can sterilize and disinfect for a long time, kills pathogenic enterobacteria, pyogenic coccus, pathogenic saccharomycetes and other common pathogenic bacteria, prevents secondary infection, resists bacteria and relieves itching, and is a human povidone-iodine solution which is used for people and has the effects of promoting wound healing and moistening skin. When in use, the liquid does not dye clothes, is non-toxic in mouth, does not irritate skin, wounds, mucous membranes and eyes, and does not leave scars after the wounds are healed.

The invention discloses a rubber strip clamping type automobile sunroof guide rail, and belongs to the technical field of automobile sunroof guide rails. The rubber strip clamping type automobile sunroof guide rail comprises a second support, a pair of second clamping pieces is fixedly connected to the upper end of the second support, a second rubber strip body is arranged between the pair of second clamping pieces, a plurality of reinforcing fins which are uniformly distributed are fixedly connected to the pair of side walls of the second rubber strip body, the reinforcing fins are located between the pair of second clamping pieces, one end of the second rubber strip body is fixedly connected with a second connecting piece, a pair of clamping columns is fixedly connected to the second connecting piece, and clamping grooves matched with the clamping columns are formed in one end of the second clamping piece. According to the rubber strip clamping type automobile sunroof guide rail, themode that a double-sided adhesive tape pasting mode is changed into a clamping connection mode can be achieved, the possibility that the rubber strips fall off is greatly reduced, the stability is improved, and meanwhile, the process of sticking the double-faced adhesive tape in the production and assembly process is reduced, the cost of the double-faced adhesive material is eliminated, and the labor cost is reduced.