151 results about "PTFE fiber" patented technology

The invention relates to the technical field of power transmission, in particular to a moisture-proof cable which sequentially comprises a conductive wire core, a gradient buffer layer, a dynamic sealing layer, a flexible supporting layer and a self-repairing sheath from inside to outside. A gradient buffer layer; the dynamic sealing layer is of a split type sealing structure formed by an outer ring surface sealing lip and an inner ring surface static sealing belt, the outer ring surface sealing lip is formed by embedding a polytetrafluoroethylene fiber reinforcing layer in a silicone rubber matrix, and the surface of the outer ring surface sealing lip is coated with a humidity response type graphene coating; the flexible supporting layer is formed by spirally winding a nickel-titanium alloy belt, and bionic fish scales are welded to the surface of the nickel-titanium alloy belt; the self-repairing sheath is characterized in that a hexagonal honeycomb structure is molded on the outer layer, hydroxyl-terminated polysiloxane and a platinum catalyst are contained in an A-type microcapsule, and modified epoxy resin is contained in a B-type microcapsule. The moisture-proof cable shows excellent corrosion resistance, moisture resistance and self-repairing capability in a humid environment, and can maintain good performance when subjected to external physical impact.

The invention relates to the technical field of high-temperature gas filtration, and particularly discloses a preparation method of a high-temperature-resistant and corrosion-resistant composite spunlace filter material. The preparation method of the filter material comprises the following steps: pretreating the PTFE short fibers, the glass fibers and the high-temperature-resistant glass fiber woven base cloth; mixing the pretreated glass fibers with PI fibers to obtain mixed fibers; the pretreated PTFE fibers and the mixed fibers are respectively subjected to carding, net forming and net laying, the pretreated PTFE fibers form a surface layer, the mixed fibers form a bottom layer, pretreated high-temperature-resistant glass fiber woven base cloth is used as middle base cloth, pre-needled reinforcement and winding are performed to obtain a pre-needled felt, and the pre-needled felt is subjected to spunlace reinforcement, drying and winding to obtain a filter material plain felt; dipping, shaping and laminating the filter material to obtain the high-temperature-resistant and corrosion-resistant composite spunlace filter material. According to the method, a high-temperature-resistant system for increasing the temperature-resistant threshold value layer by layer is formed, the corrosion resistance is enhanced, and synergistic improvement of high temperature resistance and strong corrosion resistance is achieved.

The invention relates to a filter screen and a preparation method and application thereof, and belongs to the technical field of filtering equipment, the filter screen comprises a hydrophobic enhancement layer, a pre-filtering layer and a core filtering layer which are stacked in sequence; the hydrophobic reinforcing layer comprises the following components: metal fibers; the pre-filtering layer is prepared from the following components: basalt fibers; and the core filter layer comprises the following components: polytetrafluoroethylene fibers and polyether-ether-ketone fibers. By designing the structure of the filter screen, the filter screen which can stably work in a high-temperature environment, has excellent hydrophobic performance and filtering efficiency and is controllable in manufacturing cost is obtained.

The invention relates to the technical field of high-barrier films, and particularly discloses a high-barrier polyvinyl alcohol biaxially oriented film and a preparation method thereof. The high-barrier polyvinyl alcohol biaxially oriented film comprises a polyvinyl alcohol biaxially oriented film base material and a high-barrier coating formed on the polyvinyl alcohol biaxially oriented film base material in a single-side coating manner, and the high-barrier coating is prepared from the following raw materials in parts by weight: 5-7 parts of polyvinyl alcohol; 0.5 to 1 part of amino resin; 0.01 to 0.3 part of a catalyst; 90 to 95 parts of deionized water; 0.01 to 0.05 part of a filling material; 0.01 to 0.1 part of an auxiliary agent is added; 0.01 to 0.03 part of polytetrafluoroethylene fiber; and 0.04 to 0.08 part of porous polyimide microspheres. The high-barrier coating of the high-barrier polyvinyl alcohol biaxially oriented film and the polyvinyl alcohol biaxially oriented film base material have excellent interface bonding stability in a temperature change environment, and the overall application quality is better.

The invention discloses an industrial flue gas denitration filter bag and a preparation method thereof, and relates to the technical field of flue gas denitration. The industrial flue gas denitration filter bag comprises PTFE (Polytetrafluoroethylene) fibers, PPS (Polyphenylene Sulfide) fibers, PI (Polyimide) fibers and PTFE loaded fibers. Wherein the PTFE loaded fiber is a PTFE fiber layer loaded with a modified molecular sieve catalyst; the modified molecular sieve catalyst takes a molecular sieve coated with modified nanorods as a carrier, a vanadium-titanium composite oxide as an active catalytic component and a cerium-titanium composite oxide as a co-catalytic component; the modified nanorod is a molybdenum-tungsten composite oxide modified cerium dioxide nanorod. By introducing the modified molecular sieve catalyst prepared from cerium dioxide nanorods, lanthanum nitrate, molybdenum trioxide and other raw materials, the denitration capacity, the ammonia escape prevention capacity, the sulfur poisoning resistance, the hydrothermal stability and the working life are further improved, and an active temperature window is widened. Therefore, the method has a wider application prospect.

The invention relates to the technical field of industrial filter materials, in particular to a spunlace filter material for a filter cartridge and a preparation method of the spunlace filter material for the filter cartridge, and the preparation method comprises the following steps: S1, respectively opening and mixing modified polytetrafluoroethylene fibers and polyester fibers to obtain mixed fibers, and carding, lapping, combining and pre-needling the mixed fibers to obtain a pre-needled felt; s2, the pre-needled felt is subjected to spunlace reinforcement and drying shaping, and a filter material plain felt is obtained; s3, singeing the surface of the filter material plain felt, soaking the filter material plain felt in the finishing liquid, mangling the soaked filter material plain felt, and drying to obtain the spunlace filter material for the filter cartridge. The flame retardant property, corrosion resistance and filtering efficiency of the spunlaced filter material for the filter cartridge are comprehensively improved through chemical crosslinking of epoxy groups introduced to the surfaces of the modified polytetrafluoroethylene fibers and amino groups on the surfaces of the modified silicon dioxide and a finishing liquid impregnation technology.

The invention relates to the field of filter materials, and discloses a denitration catalyst-loaded filter bag and a preparation method thereof, the filter bag comprises interface modifier impregnated modified polytetrafluoroethylene fiber and a catalytic additive loaded on the modified polytetrafluoroethylene fiber, the interface modifier is prepared by carrying out hydrolysis-polycondensation on ethyl orthosilicate, perfluorooctyl ethyl trimethoxy silane, trimethyl borate and 3-(2, 3-epoxypropoxy) propyl trimethoxy silane, and the interface modifier is prepared by carrying out hydrolysis-polycondensation on ethyl orthosilicate, perfluorooctyl ethyl trimethoxy silane, trimethyl borate and 3-(2, 3-epoxypropoxy) propyl trimethoxy silane; the catalytic additive is prepared by using polyether PluronicF127, 1, 3, 5-trimethylbenzene and dopamine as raw materials through emulsion-induced interface assembly and externally introducing mesoporous silica to prepare a hollow spherical catalyst carrier, then loading cerium and manganese precursors onto the surface of the hollow spherical catalyst carrier, and coating with a titanium dioxide shell layer. The filter bag prepared by the invention has good denitration activity, sulfur resistance, water resistance, hydrophobicity and friction resistance.

The invention provides a dry-process low-temperature pulse iodine positive electrode preparation method and a battery, and relates to the technical field of iodine positive electrode preparation, the iodine positive electrode preparation method comprises the following steps: mixing elemental iodine with activated carbon to obtain a carbon-iodine composite material, then putting the solid powdery carbon-iodine composite material, a conductive agent and polytetrafluoroethylene into a high-speed stirrer, and stirring at a high speed; and sequentially carrying out constant-speed intermittent pulse stirring, speed-reducing pulse stirring and speed-increasing pulse stirring, and finally rolling to obtain the iodine positive electrode. According to the stirring operation, the temperature rise effect in the high-speed stirring process is inhibited, the mixture obtained after polytetrafluoroethylene fiberization is obtained through low-temperature pulse stirring, the surface of the prepared iodine positive plate is smooth and flat, the cracking phenomenon does not exist, the shearing force is regulated and controlled through low-temperature pulse stirring, mechanical disturbance is weakened, and the iodine positive plate has the good application prospect. And the temperature is reduced to inhibit thermal desorption of iodine molecules, so that the damage to the iodine adsorption effect of porous carbon is reduced, and the mechanical strength and electrochemical performance of the electrode are remarkably improved.

The invention provides a lithium-manganese button cell positive electrode ring prepared based on a dry electrode process as well as a preparation method and application of the lithium-manganese button cell positive electrode ring. The method comprises the following steps: premixing electrolytic manganese dioxide (EMD) powder, a conductive agent and low-melting-point polytetrafluoroethylene (PTFE) fibers in a low-temperature environment; carrying out high-speed shearing on the premixed material to form a dry electrode blank material with self-supporting capability; the obtained dry electrode blank material is subjected to hot rolling through a heating roller device, and an obtained film material is conveyed back to the heating roller device to be subjected to second face rolling; wherein the temperature of the roller is controlled within a temperature range which is lower than the melting point of the PTFE fiber but is enough to enable the PTFE fiber to creep, and meanwhile, high pressure is applied; and die cutting and forming. The positive electrode ring of the lithium-manganese button cell prepared by the method has a unique gradient pore structure and a high-conductivity network, and polarization is greatly reduced, so that the cell is more suitable for an application scene of high pulse current discharge.

The utility model discloses a destaticizing mechanism for polytetrafluoroethylene fiber production, which comprises a base, a lifting adjusting mechanism is arranged on the base, a concave mounting rack is arranged on the lifting adjusting mechanism, a first destaticizing cylinder and a second destaticizing cylinder are respectively and fixedly welded at two ends of the concave mounting rack, and the first destaticizing cylinder and the second destaticizing cylinder are fixedly welded at two ends of the concave mounting rack. A mounting plate is fixedly mounted at the front end of the first static electricity removing barrel, and two static electricity removing fans which are symmetrically arranged up and down are fixedly mounted on the mounting plate. Through cooperation of the first static electricity removing cylinder, the second static electricity removing cylinder, the connecting cylinder, the mounting plate, the static electricity removing fan and other components, charged air blown out by the static electricity removing fan can be blown into the second static electricity removing cylinder through the connecting cylinder after static electricity of polytetrafluoroethylene fibers passing through the first static electricity removing cylinder is removed; the polytetrafluoroethylene fibers entering the first static electricity removing cylinder are subjected to static electricity removing pretreatment, and the static electricity removing effect of the polytetrafluoroethylene fibers is greatly improved.

The invention belongs to the technical field of filter presses, and discloses a filter press forced cake unloading filter cloth and a forced cake unloading mechanism, the filter press forced cake unloading filter cloth comprises a composite filter cloth, the composite filter cloth comprises a filter layer and a base cloth layer, the filter layer is formed by compounding polytetrafluoroethylene, polyphenylene sulfide and matrix resin, and the base cloth layer is formed by compounding polytetrafluoroethylene, polyphenylene sulfide and matrix resin. The warps of the base cloth layer are formed by twisting polytetrafluoroethylene fibers and zirconium oxide fibers. The polytetrafluoroethylene has corrosion resistance, the polyphenylene sulfide has high temperature resistance, and the zirconium oxide fiber has a synergistic effect of thermal shock resistance, so that the composite filter cloth can stably run for a long time in high-temperature, high-pressure and acid-base environments, the problem that traditional filter cloth is easy to age and damage is solved, and the composite filter cloth optimizes the air permeability and the filtering precision, and has a good application prospect. And the filter cloth has the advantages of corrosion resistance, reduction of filtrate leakage pollution, reduction of waste generation, improvement of the service life, meeting of green production requirements, wide application in the fields of industrial dust removal, chemical filtration, aerospace and the like, and higher adaptability compared with the traditional filter cloth.

The invention relates to the technical field of self-lubricating materials, in particular to a self-lubricating fabric gray fabric and a preparation method and application thereof, a self-lubricating liner material and a preparation method and application thereof, and a self-lubricating fabric composite material and a preparation method and application thereof. The preparation method comprises the following steps: sequentially performing first twisting and first sizing on meta-aramid fibers to obtain pretreated meta-aramid fibers; sequentially performing second twisting and second sizing on polytetrafluoroethylene fibers to obtain pretreated polytetrafluoroethylene fibers; weaving the pre-treated meta-aramid fiber and the pre-treated polytetrafluoroethylene fiber to obtain a fabric gray fabric; sequentially performing dopamine-silane coupling agent modification on the gray fabric to obtain the self-lubricating gray fabric. Based on a fabric weaving pretreatment technology and a dopamine-silane coupling agent synergistic interface treatment technology, the prepared self-lubricating fabric grey cloth has excellent bonding strength, has excellent friction and wear properties in a working condition environment with a variable temperature range of-55-230 DEG C, and is long in service life.

The present invention discloses a coalescence separation system and method for aqueous organic phase in the rare earth extraction process. The system includes a pre-filtering unit and a coalescence separation unit; the pre-filtering unit includes a pre-filter, and the coalescence separation unit includes a horizontal coalescence separator; the pre-filter is configured to pre-filter the aqueous blank organic phase to remove solid particles, obtaining the pre-filtered aqueous blank organic phase; wherein, the aqueous blank organic phase is obtained by hydrochloric acid back-extraction and pure water washing during the rare earth extraction process; the horizontal coalescence separator includes a horizontal coalescence separator body and coalescence filter elements; the outer layer of the coalescence filter element is a perfluoroethylene-propylene fiber layer, and the inner layer is a polytetrafluoroethylene fiber layer; the theoretical flow rate of a single coalescence filter element is less than or equal to 1.5 m<supgt;3< / supgt> / h. This system can remove trace water in the aqueous blank organic phase generated during the rare earth extraction process, and the water removal efficiency is greater than 80%.

The application relates to a filter screen and a preparation method and application thereof, and belongs to the technical field of filtering equipment. The filter screen comprises a hydrophobic reinforcing layer, a pre-filtering layer and a core filtering layer which are sequentially stacked; the hydrophobic reinforcing layer is composed of metal fibers; the pre-filtering layer is composed of basalt fibers; and the core filtering layer is composed of polytetrafluoroethylene fibers and polyether ether ketone fibers. The filter screen can stably work in a high-temperature environment, has excellent hydrophobic performance, high filtering efficiency and controllable manufacturing cost through the design of the structure of the filter screen.

The present application relates to the technical field of battery preparation, and more particularly to a dry method multi-layer composite electrode film, a preparation method thereof, an electrode sheet and a battery. The dry method multi-layer composite electrode film comprises an electrolyte induction layer, an active material layer, a structure layer and a buffer layer. The electrolyte induction layer is formed by a polar organic high-molecular cross-linked organic film base material, and the electrolyte is better infiltrated into the electrode interior through the attraction of polar molecules to the electrolyte. The structure layer is supported by a high-strength organic film, which improves the structure and tensile strength of the dry method electrode self-supporting film. The buffer layer is formed by an elastic organic high-molecule film, which sets an elastic buffer layer for the multi-layer electrode sheet structure, plays a buffering role when the active material particles swell and shrink, and prevents the destruction of the PTFE fiber filament structure or the electrode sheet structure caused by the volume change of the particles. The present application solves the problems of low mechanical tensile strength, poor electrolyte infiltration and weak volume change resistance in the prior art.

The present application relates to filter cotton technical field, specifically, it is a kind of high-temperature oven special heat-resistant filter cotton and its preparation process.It includes the following raw materials: polytetrafluoroethylene fiber, fluoroethylene carbonate, silicone resin, 2,2-dimethylol propionic acid, oil agent, pore-forming agent, adhesive and silicon carbide fiber.In the present application, under high-temperature oven working condition, polytetrafluoroethylene fiber melts and flows to wrap silicon carbide fiber to form "sheath-core" sealing structure, which can block the penetration of corrosive medium;fluoroethylene carbonate decomposition product reacts with the surface of silicon carbide fiber to form nanocomposite layer, its micro-nano level rough interface can induce airflow turbulence, and micropore can prolong airflow path, further improve the diffusion capture efficiency of submicron particles, so that filter cotton can still maintain high interlaminar peeling strength after thermal cycling under high-temperature oven working condition, thereby ensuring the premise of filtration performance to improve the high-temperature resistance of filter cotton.

The utility model discloses a multi-layer composite dust removal filter material bag, which belongs to the technical field of dust removal filter material bags and comprises a filter material bag body and a cage frame, a high-temperature-resistant layer is woven on the surface of the filter material bag body and comprises a PPS (polyphenylene sulfite) fiber layer, a PI (polyimide) fiber layer and a PTFE (polytetrafluoroethylene) fiber layer, through holes are formed in the surface of the cage frame, and connecting columns are arranged in an inner cavity of the cage frame. The connecting column is fixedly connected with the cage frame through a group of reinforcing ribs, the PPS fiber layer, the PI fiber layer and the PTFE fiber layer are consistent in thickness and are 0.3 mm-0. 9mm in thickness, the inner surface of the PPS fiber layer is woven on the outer surface of the PI fiber layer, and the inner surface of the PI fiber layer is woven on the outer surface of the PTFE fiber layer. According to the high-temperature-resistant filter material bag, the characteristics of the PPS fiber layer, the PI fiber layer and the PTFE fiber layer are utilized, so that the filter material bag body has a high-temperature-resistant function and can resist erosion of high-temperature waste gas and corrosive substances, and damage caused by high temperature and chemical corrosion is reduced.

The utility model discloses a high-elasticity polytetrafluoroethylene hose, and belongs to polytetrafluoroethylene tubes. The high-elasticity polytetrafluoroethylene hose comprises a first pure polytetrafluoroethylene hose body, the outer layer of the pure polytetrafluoroethylene hose body is covered with a first polytetrafluoroethylene fiber layer, the outer layer of the first polytetrafluoroethylene fiber layer is covered with an expanded polytetrafluoroethylene layer, and the outer layer of the expanded polytetrafluoroethylene layer is covered with a second polytetrafluoroethylene fiber layer. The outer layer of the second polytetrafluoroethylene fiber layer is sleeved with a second pure polytetrafluoroethylene pipe body. In addition to corrosion resistance, electrical insulation, temperature resistance and the like, the cable also has the advantages of higher elasticity, lower bending strength, smaller bending curvature radius, smooth inner wall, small resistance and the like.

The invention discloses homogeneous dust removal-catalytic dioxin removal filter cloth and a preparation method thereof, and belongs to the technical field of dust removal and catalytic removal of harmful gases such as dioxin. The preparation method comprises the following steps: carrying out loading, drying, roasting and crushing treatment on a catalyst precursor mixed solution and carbon fibers to obtain catalyst-carbon fiber composite powder; the catalyst-carbon fiber composite powder and deionized water are fully stirred and mixed, and a catalyst suspension injection is obtained; and injecting the catalyst suspension injection into the PTFE fiber filter material in a needling injection manner, and carrying out singeing, calendaring, drying and shaping treatment to obtain the homogeneous dust removal-catalytic dioxin removal filter cloth. According to the catalytic filter cloth prepared by the invention, the load rate is obviously improved, a catalyst is uniformly distributed, a dispersed and loose three-layer structure in the prior art is changed into an integrally compact single-layer structure, and the problems of damage and falling of a filter bag body in the prior art can be avoided during back flushing operation.

The invention relates to the technical field of dust removal of high-temperature flue gas, and particularly discloses a production method of a glass fiber PTFE (Polytetrafluoroethylene) base cloth reinforced high-temperature-resistant filter material. The production method comprises the following steps that glass fiber filament yarn is subjected to heat treatment at 350-400 DEG C, the glass fiber yarn subjected to heat treatment passes through composite emulsion and is dried, and warp yarn is obtained; taking the PTFE filament yarns as weft yarns, and making the warp yarns and the weft yarns into woven cloth by adopting a rapier loom, so as to obtain glass fiber PTFE base cloth; the preparation method comprises the following steps: mixing chopped PTFE fibers and chopped glass fibers according to a weight ratio of (4-7): (3-6), opening and carding, and carrying out lapping, grid connection and pre-needling by taking glass fiber PTFE base cloth as base cloth, so as to obtain a composite pre-needled felt; the composite pre-needled felt is subjected to spunlace reinforcement treatment and singeing and then soaked in a stiffening agent, mangling and drying are conducted after soaking, and the glass fiber PTFE base cloth reinforced high-temperature-resistant filter material is obtained. The mechanical property of the filter material can be improved.

The utility model relates to the technical field of laminating machines, in particular to a laminating positioning device for a laminating machine, which comprises a laminating machine body, a base arranged at the lower end of the laminating machine body, a movable block arranged at the upper end of the base, a workbench fixedly arranged on the top surface of the movable block, a groove arranged on the top surface of the workbench, and a plurality of micropores arranged at the bottom of the groove. A cavity is formed in the workbench, a vacuum pump is installed on the side wall of the base through an installation base, the air inlet end of the vacuum pump communicates with a telescopic hose, and two positioning assemblies are installed on the workbench in a central symmetry structure. The pressure in the adsorption process is buffered, stress concentration is avoided, friction and damage to the materials are further reduced, indentation, tearing or deformation of the surfaces of the materials in the attaching process are reduced, the attaching quality and the yield are improved, the problem that the edges of the materials warp or the middles of the materials collapse is solved, and bubbles on the attaching interface are reduced.

The application belongs to the technical field of electronic circuits, and discloses a PTFE low-thermal-expansion-coefficient copper-clad plate and a preparation method thereof.The PTFE low-thermal-expansion-coefficient copper-clad plate comprises a fiber base cloth, the upper surface or / and the lower surface of the fiber base cloth is provided with a metal material layer, the metal material layer is connected with the fiber base cloth through an adhesive layer, and the fiber base cloth is woven by polytetrafluoroethylene fibers or woven by polytetrafluoroethylene fibers and mixed fibers.The copper-clad plate prepared by the application is prepared by hot pressing the fiber base cloth woven by the PTFE fibers with low dielectric constant after thermal stretching and the metal material after coating the adhesive, and has excellent electrical performance, low thermal expansion coefficient, and mature technology, so that the large-scale production of the copper-clad plate is relatively easy to realize.

The invention relates to the technical field of building decoration materials, in particular to a diatomite composite humidity-adjusting decoration plate and a preparation method thereof.According to the diatomite composite humidity-adjusting decoration plate and the preparation method thereof, through the structural design of surface layer moisture absorption, middle layer load bearing and bottom layer moisture removal, certain moisture absorption is achieved through PTFE fibers and wood fibers in a bottom layer, and meanwhile a corresponding drainage channel is provided; on the whole, on the basis of not influencing the overall humidity adjusting performance, the diffusion of humid gas on one side of the bottom layer to the surface layer is reduced, so that the effects of preventing cracking and mildew are achieved.

Disclosed are a method of manufacturing a high-efficiency denitrification catalyst by adjusting components constituting a denitrification catalyst and a ratio between respective components, a method of modifying the surface of PTFE fibers by extruding, rolling, stretching and slitting a PTFE billet manufactured using mixed solid particles, and a method of producing a PTFE catalyst filter by the methods.

The scheme provides a super-hydrophilic polytetrafluoroethylene fiber composite diaphragm and a preparation method and application thereof, comprising: a PTFE fiber microporous base film; polydopamine self-polymerized on the PTFE fiber microporous base film; and nano-inorganic oxide connected to the PTFE fiber microporous base film through a coupling agent and polydopamine, wherein the super-hydrophilic polytetrafluoroethylene fiber composite diaphragm has excellent hydrophilicity and ion transmission efficiency, and can realize stable and efficient application in water-based ion electrochemical energy storage devices.

The invention provides an electrode which comprises a current collector and a dry electrode film located on the surface of the current collector, the dry electrode film comprises an active material and a binding agent, the binding agent comprises a fiberized binding agent and a non-fiberized binding agent, the fiberized binding agent comprises polytetrafluoroethylene, and the standard specific gravity value of the fiberized binding agent is 2.140-2.160; the non-fibrillated binder is selected from at least one of polyvinylidene fluoride, a vinylidene fluoride-hexafluoropropylene copolymer, polyacrylic acid and sodium carboxymethyl cellulose, and the weight-average molecular weight of the non-fibrillated binder is 100,000-1,500,000. The electrode has higher rate capability on the basis of ensuring good mechanical properties, electronic conductivity and first efficiency of the dry electrode diaphragm.

The utility model provides a gradient type superfine PPS-aramid fiber high-temperature-resistant composite needled felt which comprises a main filtering layer, a pre-filtering layer and a connecting layer, and the pre-filtering layer and the connecting layer are fixedly connected to the two side faces of the main filtering layer respectively. A first gradient sub-layer, a second gradient sub-layer and a third gradient sub-layer are fixedly connected to the side face, away from the main filtering layer, of the connecting layer in sequence, and a fourth gradient sub-layer is fixedly connected to the side face, away from the second gradient sub-layer, of the third gradient sub-layer; the proportions of PI and PTFE fibers in the first gradient layer, the second gradient layer and the third gradient layer are sequentially increased. According to the scheme, the needled felt with the main filtering layer as a main body is compounded with the fiber net which is formed by penetrating PI into PTFE to serve as base cloth according to different PI and PTFE fiber proportions, and the mode that the aramid nanofiber dispersion liquid is adopted for coating scraping and covering is adopted, so that the scheme can filter dust particles in the atmosphere in a gradient layering mode, and the purpose of improving the filtering effect is achieved.

The present application relates to the technical field of artificial turf, in particular to a self-lubricating and self-cleaning ski artificial turf and a preparation method thereof, which is used to solve the problem that the existing ski artificial turf does not have self-lubricating and self-cleaning functions; the preparation method takes modified nylon 6 as a main raw material; the modified nylon 6 has high toughness, good heat resistance, low friction coefficient and excellent self-lubricating performance; the polytetrafluoroethylene fiber D30 synergistic reinforcing material has high temperature resistance, corrosion resistance and self-lubricating performance; the addition of the modified hydrophobic film and the modified silicone resin coating can significantly improve the self-cleaning ability of the material, so that the prepared ski artificial turf has self-lubricating performance, reduces the frictional resistance during exercise, improves the smoothness of sliding, reduces the equipment loss, and at the same time has self-cleaning ability, so as to ensure that the lawn surface is not easy to accumulate dust and be contaminated.

The utility model relates to the technical field of PTFE (polytetrafluoroethylene) fiber structures, and discloses a tensile PTFE fiber structure which is characterized in that a clamping seat is arranged on a fiber braid layer in a hot-pressing manner, a limiting mechanism is detachably connected in the clamping seat, a jacking mechanism is inserted in the limiting mechanism and is connected in a sliding opening in a sliding manner, the sliding opening is arranged on a net rack in a hot-pressing manner, and the net rack is connected with the clamping seat in a sliding manner. A vertical seat is arranged on the sliding opening, a plug is connected to the vertical seat in a sliding mode, the input end of the plug is in lap joint with the jacking mechanism, the plug is inserted into the limiting mechanism, a clamping seat is installed on the fiber woven layer, a fixing seat can be installed on the clamping seat, and a sliding seat is arranged on the net frame. When the net rack is connected with the fiber woven layer, the sliding seat on the net rack can be pushed into the fixed seat, and the net rack and the fiber woven layer can be quickly assembled after the top plate on the sliding seat is clamped on the circular plate, so that the stretching resistance of the fiber woven layer is realized, and the fiber woven layer is protected.

The invention relates to the technical field of hybrid ionic membranes, in particular to a composite hybrid ionic membrane and a preparation method thereof.The preparation method includes the following steps that S1, membrane liquid is prepared, and raw materials of the membrane liquid include ethylene-butylene copolymer, chlorobenzene, anhydrous zinc chloride, chloromethyl butyl ether, N, N-dimethylformamide, butylated hydroxytoluene and MIL-101 (Cr). According to the preparation method disclosed by the invention, the polytetrafluoroethylene fiber is subjected to chlorosulfonation reaction by treating the polytetrafluoroethylene fiber, and a sulfonic acid group can be introduced into the polytetrafluoroethylene fiber through chlorosulfonation, so that the surface energy and hydrophilicity of the polytetrafluoroethylene fiber are effectively improved; the polytetrafluoroethylene fiber can have good interface bonding force with membrane liquid, so that the membrane liquid and a membrane layer are effectively combined, after hot-pressing polymerization treatment, ethylene-butylene copolymer chain segments actively move and are mutually interspersed and combined at high temperature, more physical entanglement points are formed, and the strength performance of the composite hybrid ionic membrane is effectively improved.