72 results about "PTFE fiber" patented 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 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 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 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.

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.

A dry electrode according to the present invention employs: a first binder polymer in which a polymer including polytetrafluoroethylene is fibrillated; and a second binder polymer which has a complex viscosity of 1 Pa·s to 1500 Pa·s at 170°C and 0.1 Hz, thereby improving indentation stiffness, such as the elastic indentation modulus and indentation hardness, while ensuring sufficient tensile strength.

The utility model provides a composite efficient filtering device for PTFE (Polytetrafluoroethylene) fiber filter bag raw materials, which comprises an upper fixing plate, the bottom of the upper fixing plate is fixedly connected with a limiting column, the bottom of the limiting column is fixedly connected with a lower fixing plate, and the surface of the limiting column is provided with a composite filtering mechanism. The adsorption filter material block and the filter assembly perform filtration and adsorption work, and the filter assembly, the groove and the limiting clamping block are matched to quickly fix the filter assembly, so that the filter assembly is quickly replaced, and the situation that the overall replacement cost of the composite filter device is too high is prevented; the filter device is simple in structure, convenient and fast to replace and maintain, the service life of the filter device is prolonged, various materials such as the filter screen, the base cloth layer, the PTFE fiber layer, the protective layer, the nanofiber and the melt-blown cloth are combined with the adsorption filter material block for use, the filter effect is enhanced through combination of the materials, and it is ensured that the device can efficiently remove impurities and pollutants.

The invention relates to the field of self-lubricating materials, in particular to sulfonated PAEK resin, sulfonated PAEK sizing PTFE fibers, a self-lubricating gasket and a preparation method of the self-lubricating gasket. Wherein the sulfonated PAEK resin is prepared from the following raw materials in parts by mass: 50 to 100 parts of sulfonated PAEK powder and 5 to 10 parts of a lubricating additive; the sulfonated PAEK powder is prepared from the following raw materials: 3, 5, 3 ', 5'-tetramethyl-4, 4 '-dihydroxybiphenyl, 2, 5-potassium dihydroxybenzenesulfonate, 4, 4'-difluorobenzophenone and a catalyst. According to the sulfonated PAEK resin disclosed by the invention, the strength and the lubricity of the PTFE fiber are improved through the sulfonated PAEK powder and the lubricating additive, and the defects of insufficient lubrication and low strength of the pure PTFE fiber can be effectively overcome.

The invention discloses a preparation method of a catalytic polytetrafluoroethylene composite filter material for removing dioxin. The preparation method comprises the following steps: step 1, uniformly mixing catalyst powder, a polytetrafluoroethylene dispersion emulsion and a polyoxyethylene solution to prepare a mixed solution; step 2, preparing micro-scale fibers from the mixed solution in the step 1 through a blowing process, gathering the micro-scale fibers to form a net, and sintering at high temperature to form a catalytic micro-scale polytetrafluoroethylene fiber membrane; 3, sequentially overlapping the first fiber layer, the catalytic microscale polytetrafluoroethylene fiber membrane in the step 2, base cloth and the second fiber layer from top to bottom to form a composite structure; and step 4, needling and compounding the compounding mechanism in the step 3 through a needling mechanism to form the compound filter material. Dioxin catalytic powder particles are embedded into polytetrafluoroethylene microscale fibers by adopting a liquid spraying technology, and compared with a manner of loading a catalyst on the surface, the loading stability of the catalytic powder particles is improved, and the service life of the catalytic filter material is prolonged.

The utility model relates to the field of high-sulfur waste desulfurization, in particular to a demisting device for high-sulfur waste desulfurization, which comprises a tower body, a spiral guide vane component and a multi-stage filter component, the spiral guide vane component comprises a spiral vane, a driving component and a support, the support is arranged in the tower body, and the spiral vane is arranged in the tower body. The driving assembly is arranged at the lower end of the tower body, the spiral blade is arranged on the support, the lower end of the spiral blade is connected with the driving assembly, a T-shaped flow guide groove is formed in a spiral blade array, and the multi-stage filtering assembly comprises a hydrophobic modified PTFE fiber woven adsorption block layer and a sulfur-philic modified glass fiber cotton adsorption block layer which are arranged upwards. A nano zinc oxide loading coating is arranged on the surface of the sulfur-loving modified glass fiber cotton adsorption block layer, an air outlet is formed in the top of the tower body, a liquid discharging groove is formed in the bottom of the tower body, and an air inlet located above the support is formed in the middle of the tower body.

The invention relates to the technical field of batteries, in particular to a negative electrode material for inhibiting decomposition of PTFE (polytetrafluoroethylene) and a dry-method electrode preparation method of the negative electrode material. The negative electrode material for inhibiting PTFE decomposition comprises a silicon-carbon active material and an organic matter layer coated on the surface of the silicon-carbon active material, the organic material has lithium ion conductivity and does not have electron conductivity. According to the invention, the surface of the silicon-carbon active material is coated with the lithium-conducting and non-conductive organic matter layer to block direct electric contact between PTFE and the silicon-carbon active material, so that single electron reduction reaction of PTFE at low potential is inhibited, C-F bond breakage is avoided, generation of LiF and by-products is reduced, and the first coulombic efficiency is improved. And meanwhile, the fluorine ion release amount is reduced, so that the lithium consumption is reduced, and the cycle capacity retention ratio is further improved. In addition, the decomposition of PTFE is inhibited, the integrity of a PTFE fiber network can be maintained, and the bonding performance of the PTFE fiber network as a dry method binder is guaranteed.

The present application relates to the field of polytetrafluoroethylene fiber stretching, and particularly relates to a stretching device for polytetrafluoroethylene fiber processing, which comprises a mounting frame, a heating unit is uniformly arranged on one side of the mounting frame along the transverse direction, and a plurality of second heating rollers are uniformly arranged on one side of the mounting frame along the transverse direction and are rotationally arranged, the extrusion stretching of the polytetrafluoroethylene fiber is realized through the extrusion unit arranged in the present application, so that the generation of micropores is promoted, and when the polytetrafluoroethylene fiber prepared by different components is stretched, the height adjusting unit cooperates with the second pushing mechanism to simultaneously adjust the limiting pushing mechanisms on both sides, so that the extrusion rollers and the second heating rollers on both sides are synchronously adjusted, the second pushing mechanism can synchronously adjust the spacing of the extrusion rollers of the extrusion units on both sides at one time, so that the spacing of the extrusion rollers and the second heating rollers can be adjusted, and meanwhile, the spacing deviation between the adjusted extrusion rollers is ensured.

The present application relates to the technical field of PTFE fiber membrane production, in particular to a PTFE fiber membrane production line process parameter optimization control method based on the Internet of Things, comprising: obtaining a real-time data set of Internet of Things sensors of multiple process links on the production line, including primary extrusion process parameters, drafting process timing parameters, sintering process temperature and pressure data, and secondary extrusion composite process parameters; performing feature extraction and fusion on the data to generate a production line comprehensive state feature matrix; calling a particle swarm optimization algorithm improved according to the physical coupling relationship of each process parameter to analyze the matrix and generate a process parameter optimization suggestion vector; generating an adjustment instruction set through a process controller collaborative calculation model and issuing it to the extruder, drafting machine and sintering furnace actuator to drive their collaborative adjustment. This method realizes accurate optimization of process parameters and collaborative control of actuators, ensuring stable operation of the production line.

The invention provides an oxidation-resistant acid-corrosion-resistant chemical fiber filter material and a preparation method thereof, and the preparation method comprises the following steps: alternately laying two layers of mixed cellulose felts and one layer of polytetrafluoroethylene base cloth to form a laminated body with a sandwich structure, and carrying out composite needling reinforcement on the laminated body to obtain a composite needled felt; wherein the mixed cellulose felt is obtained by mixing and needling polyphenylene sulfide fibers and polytetrafluoroethylene fibers; dipping the composite needled felt in the functionalized mixed solution, extruding the composite needled felt, and drying the composite needled felt in a two-way convection hot air oven to remove a coating, so as to obtain a functionalized composite needled felt; wherein the functionalized mixed solution comprises a polytetrafluoroethylene dispersion emulsion; and performing high-temperature singeing on the surface of the functional composite needled felt, and thermally coating a polytetrafluoroethylene film on the surface of the functional composite needled felt to obtain the oxidation-resistant and acid-corrosion-resistant chemical fiber filter material. According to the scheme, deep dipping, high-temperature singeing and film coating processes are synchronously completed, so that the filter material has excellent oxidation resistance, excellent acid corrosion resistance, efficient filtering performance and good mechanical properties.

The present application relates to the technical field of industrial filter material, and particularly relates to a spunlace filter material for filter cartridge and a preparation method thereof, comprising the following steps: S1, modifying polytetrafluoroethylene fibers and polyester fibers are respectively subjected to opening and mixing treatment to obtain mixed fibers, and the mixed fibers are subjected to carding, web laying, web combining and pre-needling to obtain a pre-needled felt; S2, the pre-needled felt is subjected to spunlace reinforcement and drying and setting to obtain a filter material base felt; S3, the surface of the filter material base felt is subjected to singeing treatment, then is immersed in a finishing liquid, and the filter material base felt after immersion is subjected to liquid rolling and drying to obtain the spunlace filter material for filter cartridge. Through the chemical cross-linking of the epoxy groups introduced on the surface of the modified polytetrafluoroethylene fibers and the amino groups on the surface of the modified silicon dioxide and the finishing liquid immersion technology, the comprehensive improvement of the flame-retardant performance, the corrosion-resistant performance and the filtration efficiency of the spunlace filter material for filter cartridge is realized.

The application discloses a heat-resistant polytetrafluoroethylene sewing thread and a preparation method thereof. The heat-resistant polytetrafluoroethylene sewing thread comprises a wear-resistant layer, a tensile layer and a thread core. The thread core is composed of first polytetrafluoroethylene fibers, second polytetrafluoroethylene fibers and shaped fibers. The thread core is provided with the shaped fibers, and the outer surface layer of the shaped fibers is interwoven with the first polytetrafluoroethylene fibers and the second polytetrafluoroethylene fibers. The outer surface layer of the thread core is provided with the wear-resistant layer, and the wear-resistant layer is provided between the tensile layer and the thread core. The outer surface layer of the first polytetrafluoroethylene fibers and the second polytetrafluoroethylene fibers is resistant to high temperature and has good heat insulation effect by using a ceramic fiber coating as a heat insulation coating. The prepared thread core has a flame-retardant effect. The wear-resistant layer is a polyurethane fiber material layer, which is resistant to wear and tear and is not easy to break. The surface of the thread body is easy to clean. The polytetrafluoroethylene sewing thread prepared by the heat-resistant polytetrafluoroethylene sewing thread and the preparation method thereof is non-toxic, harmless, environmentally friendly, not easy to corrode and durable.

The invention relates to the technical field of medical materials, and particularly discloses a non-absorbable suture with excellent biocompatibility and a preparation method of the non-absorbable suture. The non-absorbent suture provided by the invention comprises a core layer, a transition layer and a surface functional layer, the core layer and the transition layer are interwoven and fixed through electrostatic spinning, and the surface functional layer is fixed on the surface of the transition layer through vapor deposition polymerization; the diameter of the core layer is 20-50 microns, and the porosity of the core layer is less than 5%; the transition layer is made of polyether-ether-ketone of which the mesh aperture is 10-15 microns and the thickness is 5-10 microns; the surface functional layer is a zwitterionic polymer covalently grafted with phosphorylcholine, and the thickness of the zwitterionic polymer is 0.5-1.2 [mu] m; the invention further provides a preparation method of the non-absorbent suture. The non-absorbable suture has the advantages of being good in biocompatibility, good in long-term mechanical stability and the like, and is suitable for medical suture scenes needing lasting support.

The application belongs to the technical field of functional fiber materials, and particularly relates to a fiber composite material for dust removal cloth bags and a preparation method thereof. The fiber composite material comprises the following raw materials in parts by weight: modified fiber 50-70 parts, LMPET 15-30 parts, PTFE fiber 10-15 parts, plant fiber 20 parts and impregnation liquid 60 parts. The modified fiber obtained by treating PPS with carbon black, titanium dioxide and PP-g-MAH has certain electrical conductivity and high wear resistance, can effectively reduce the electrostatic hazard in the dust adsorption process, improve the durability of the fiber composite material, the impregnation liquid can promote the high-temperature carbonization conversion of the plant fiber, can also penetrate and fill the fiber pores, form a protective layer with the characteristics of firmness, water repellency and oil repellency on the surface, and improve the high adsorption and service life of the fiber composite material.

The invention belongs to the technical field of functional polymer membrane materials, and discloses a method for improving the mechanical stability of an anion exchange membrane. According to the method, two-way stretched porous polytetrafluoroethylene is used as a supporting and reinforcing framework, interface compounding of polytetrafluoroethylene fibers and anion exchange resin is improved, and from OH <-> ion conduction, water diffusion and interface failure of a composite membrane, quaternization modification is carried out on perfluorinated sulfonic acid resin, so that the composite membrane is obtained. Performing impregnation regulation on the interface of the expanded polytetrafluoroethylene film; performing impregnation by using solvents with different proportions to regulate the shrinkage stress of the polytetrafluoroethylene microporous film; and adding a surfactant into anion exchange resin to enhance the wettability of the solution. The preparation of the perfluoro-structure composite reinforced membrane is realized, the mechanical stability of the anion exchange membrane for water electrolysis in a high-temperature and alkali application environment is effectively improved, and the service life of the anion exchange membrane in an alkaline electrolytic bath is prolonged.

The invention provides filter material base cloth resistant to acid and alkali corrosion and a preparation method, and relates to the technical field of filter material base cloth preparation. The acid and alkali corrosion resistant filter material base cloth comprises a base cloth body and an acid and alkali resistant coating coated on the surface of the base cloth, and the base cloth body is formed by three-dimensional orthogonal weaving of the following fibers in percentage by mass: 35%-40% of aramid fibers, 25%-30% of polytetrafluoroethylene fibers, 15%-20% of carbon fibers and 10%-15% of polyether-ether-ketone fibers. The acid and alkali resistant coating is prepared from the following raw materials in parts by mass: 40 to 45 parts of polyvinylidene fluoride, 15 to 18 parts of modified epoxy resin, 6 to 8 parts of nano silicon dioxide micro powder and 3 to 4 parts of compound additive. The base cloth body is formed by three-dimensional orthogonal weaving of the four fibers, and the synergistic effect of the melt-blown polyphenylene sulfide fiber layer and the quaternary fiber system is compounded, so that the problem that mechanical strength and corrosion resistance of a traditional filter material are difficult to consider at the same time is effectively solved, and the filter material can keep good physical properties in a complex acid-base environment.

The application relates to the new energy technology field, in particular to a solid-state battery composite positive electrode and a preparation method thereof and a solid-state battery. The preparation method of the solid-state battery composite positive electrode comprises the following steps: mixing an ultrahigh-nickel positive electrode material and solid-state electrolyte powder, introducing hexamethyldisilazane for interface pretreatment to obtain pretreated materials; mixing polytetrafluoroethylene, polyethylene oxide and an interface buffer material to obtain a composite binder; mixing the pretreated materials, the composite binder and a conductive agent, performing extrusion treatment on the obtained mixture, making the polytetrafluoroethylene fibrous, and obtaining a fibrous material; and performing hot-press forming on the fibrous material. The preparation method is favorable for improving the cycle stability of the solid-state battery and prolonging the service life of the battery.

This invention discloses an outdoor fabric with abrasion resistance and its manufacturing method, relating to the field of fabric technology. The fabric comprises a dense abrasion-resistant layer, a high-efficiency cushioning layer, and a flexible substrate layer, layered sequentially from the outside to the inside and bonded together using a dot matrix adhesive structure. The dense abrasion-resistant layer is made of modified ultra-high molecular weight polyethylene fiber, activated by plasma and grafted with a nano-alumina coating, blended with polytetrafluoroethylene fiber and woven in a varied twill weave. The high-efficiency cushioning layer is a polyurethane elastomer with a three-dimensional mesh structure. The flexible substrate layer is an elastic base fabric interwoven with high-strength nylon filaments and spandex-covered yarns. The dense abrasion-resistant layer significantly improves surface scratch resistance and abrasion resistance. The high-efficiency cushioning layer contains gradient-distributed protective microcapsules, providing dual protection of energy absorption and localized reinforcement upon impact. The flexible substrate layer provides high-elasticity basic support, ensuring the fabric's overall flexibility and close fit.

The invention provides a super-hydrophobic self-cleaning PTFE-based composite membrane and application and a preparation method thereof.The super-hydrophobic self-cleaning PTFE-based composite membrane comprises a PTFE fiber membrane, a super-hydrophobic fluorine enrichment layer is formed on the outer surface of the PTFE fiber membrane, and a PTFE / silica gel three-dimensional mechanical interlocking structure layer and a porous silica gel layer are formed on the inner surface of the PTFE fiber membrane; wherein the PTFE / silica gel three-dimensional mechanical interlocking structure layer is obtained by in-situ growth of liquid silica gel on the inner surface of a PTFE fiber membrane and curing, and the porous silica gel layer is obtained by foaming the liquid silica gel with a thermal stable foaming agent, so that the effects of sparse outside, soft inside and firm interlayer adhesion are achieved; the super-hydrophobic self-cleaning film has the characteristics of super-hydrophobicity, long-acting self-cleaning, mechanical durability, high tactile fidelity and strong interface bonding.

The application belongs to the technical field of polymer material processing, and particularly relates to a preparation method of polytetrafluoroethylene fiber. The preparation method comprises the following steps: after stretching and orientation treatment of unsintered polytetrafluoroethylene rod material along the axial direction, cutting and separating treatment along the axial center line of the polytetrafluoroethylene rod material is carried out and then static setting is carried out; the fracture surface of the separated polytetrafluoroethylene rod material generates a micro-fiber structure distributed along the axial direction, and uniform peeling is carried out along the axial direction, so that the polytetrafluoroethylene fiber is obtained. The polytetrafluoroethylene rod material is actively and originally fibrillated after stretching and orientation pretreatment by using the structural characteristics of the polytetrafluoroethylene rod material, without the need of complex special equipment, so that the fiber forming efficiency is high, the fiber is continuous and fluffy, the fiber is uniform in thickness and good in toughness, the fibers are loosely interwoven, and the fibers have the peelable characteristics; and in the process of peeling into fibers, the fracture surface will be fibrillated again, so that the process is repeated, so that only one pretreatment is needed, and the soft and super-fine-diameter polytetrafluoroethylene fiber can be prepared.