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

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 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 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 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.

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 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 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 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 high voltage resistant connecting plug seat, a plug head, a connector and a working method for an electric power system. The connector comprises the plug head and the plug seat that are matched with each other; the plug head comprises a handheld part, a guiding part and a lantern head that are orderly connected; a surface of the guiding part is provided with a guiding fixed key; the plug seat comprises a plug part, a panel installation part and a tail part that are orderly connected with each other; an inner wall of the plug part is provided with a first guiding groove and a second guiding groove, the first guiding groove extends in a plugging direction of the plug head, and the second guiding groove is communicated with the first guiding groove; the second guiding groove is arranged in such a way that when the plug head is connected with the plug seat, the guiding fixed key is enabled to move in a rotating manner along the second guiding groove; a screwing wedge matched with the guiding fixed key is arranged in the second guiding groove; the screwing wedge is arranged in such a way that when the plug head is rotated, the guiding fixed wedge entering the screwing wedge is locked; the panel installation part is arranged on an outer periphery of a tail end of the plug part; one end, connected with the panel installation part, of the tail part is provided with lantern head plug holes matched with the lantern head.

The invention discloses a recyclable film-coated aluminum alloy formwork and a preparation method thereof, and relates to the technical field of construction. The film-covered aluminum alloy formwork uses an aluminum alloy plate as a base, a porous alloy as an intermediate layer, and a plastic film The layer is a three-layer structure of the surface layer, the thickness of the middle layer is 1-2mm, the thickness of the plastic film layer is 2-3mm, the porous alloy is formed by filling the sponge skeleton with nickel-copper alloy, and the sponge skeleton is Aluminum nitride framework. The prepared film-coated aluminum alloy formwork is green and environmentally friendly, has excellent corrosion resistance, can withstand the corrosion of cement, makes the cement easy to separate from the building aluminum alloy formwork, is conducive to the recycling of the building aluminum alloy formwork, and effectively saves costs.

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.