904 results about "Tetrafluoroethylene" patented technology

The invention discloses a low-creep polytetrafluoroethylene composite material and a preparation method thereof, the low-creep polytetrafluoroethylene composite material comprises the following raw materials by weight: 50-60 parts of polytetrafluoroethylene, 35-45 parts of perfluoroalkoxy resin, 15-25 parts of modified composite fiber, and 1-2 parts of a lubricant. Polytetrafluoroethylene and perfluoroalkoxy resin are blended according to a specific proportion to serve as a base material, a hot press molding process is matched, the core performance of the material is guaranteed, the molten perfluoroalkoxy resin can fully infiltrate and wrap the surface of the modified composite fiber under the driving of hot press pressure, and the performance of the composite fiber is improved. The composite material has the advantages that the composite material is high in mechanical strength, can form strong interface combination with PTFE (polytetrafluoroethylene) framework particles, can permeate and fill gaps of the PTFE framework particles, eliminates internal pores through a welding effect, and finally forms a highly-compact whole, so that the creep resistance of the composite material is remarkably improved.

The invention discloses a passive radiation refrigeration coating and a preparation method thereof, and relates to the technical field of industrial coatings. Comprising a fluoroacrylate emulsion, hollow glass beads, nano titanium dioxide, flaky silicon dioxide aerogel powder, polytetrafluoroethylene micro powder, hydroxyl-terminated polydimethylsiloxane, a hydroxyl acrylic acid modified silane coupling agent, a super-hydrophobic modified fluorosilicone surface additive, nano cerium oxide, aluminum fluoride doped zinc oxide infrared enhancement powder and deionized water. The paint is prepared on the basis of the formula. According to the invention, a multi-scale spectrum regulation and control and surface self-cleaning system is constructed cooperatively, so that the synergistic effect of high reflection of a sunlight region and high emission of a middle infrared region is realized. The coating can maintain continuous passive refrigeration in a day and night period, the surface of the coating has self-cleaning capability and excellent ultraviolet aging resistance, and high reflectivity and high radiation emissivity can be maintained for a long time in a complex outdoor environment, so that the thermal management efficiency of buildings and equipment is remarkably improved.

The invention discloses a polytetrafluoroethylene compensator with good corrosion resistance and a preparation method thereof.The polytetrafluoroethylene compensator is composed of a corrugated pipe, a pipe connecting flange and an end flange, the pipe connecting flange and the end flange are located at the two ends of the corrugated pipe, the corrugated pipe is composed of a lining layer and a base material layer, and the base material layer is made of stainless steel; the preparation method comprises the following steps: firstly, carrying out surface grafting on nano aluminum oxide by using isocyanate silane, and introducing an active reaction group; then part of active groups react with benzotriazole, so that the corrosion inhibition and adhesion enhancement functions are realized; finally, enabling the residual active groups to react with hydroxylated polytetrafluoroethylene activated by alkali treatment, and coating a chemical inert layer on the surface of the residual active groups; the obtained core-shell structure functional filler is dispersed in epoxy resin to prepare a coating, and after the coating is coated on a stainless steel base material and cured, a high-performance compensator with high hardness, strong adhesive force, excellent corrosion resistance and weather resistance is formed.

The invention belongs to the technical field of all-solid-state lithium batteries, and particularly relates to a densified sulfide all-solid-state battery composite positive electrode material and a preparation method and application thereof. The preparation method of the composite positive electrode material comprises the following steps: (1) raw material pretreatment: mixing a positive electrode active substance, a sulfide solid electrolyte and an additive according to a predetermined mass ratio under the protection of an inert atmosphere, and carrying out mechanical grinding to obtain composite positive electrode powder; the additive is Li3PO4 (lithium phosphate); (2) isostatic pressing pretreatment: performing hot isostatic pressing treatment on the composite positive electrode powder, and then controlling the cooling rate to cool to room temperature to obtain a densified composite positive electrode blank; (3) adding a conductive agent and a binder into the densified composite positive electrode blank, and mixing; the composite positive electrode material is obtained; the binder is formed by compounding nano-scale polytetrafluoroethylene and micron-scale polytetrafluoroethylene according to a mass ratio of 1: 2-1: 4.

A crosslinked rubber article comprising a crosslinked product of a fluorine-containing copolymer having a unit based on a monomer having a nitrile group and a unit based on tetrafluoroethylene, wherein when the 60°-specular gloss of the crosslinked rubber article surface is measured at 10 different sites, the minimum value of the 60°-specular gloss at the 10 different sites is 1.0 to 50.0.

The invention relates to the technical field of electric wires and cables, and discloses a fluoroplastic insulating high-temperature-resistant fireproof cable and a preparation method thereof.The cable comprises a conductor layer, the conductor layer is formed by twisting multiple strands of copper wires, the periphery of the conductor layer is coated with a fluoroplastic insulating layer, the periphery of the fluoroplastic insulating layer is coated with a shielding layer, and the shielding layer is arranged on the periphery of the conductor layer. The shielding layer is of a copper strip braided structure, the periphery of the shielding layer is coated with an armor layer, the armor layer is braided by stainless steel wires, the periphery of the armor layer is coated with a sheath layer, and the sheath layer comprises the following components in parts by mass: 50-70 parts of functionalized ethylene-tetrafluoroethylene copolymer. According to the invention, an interpenetrating polymer network formed by in-situ crosslinking of the functionalized fluoropolymer and the organosilicon elastomer is constructed in the sheath layer, and an energy field gradient response vulcanization process is adopted, so that the prepared cable sheath maintains the inherent high temperature resistance of fluoroplastic, and the flexibility and mechanical strength of the material are improved at the same time.

A method for producing an aromatic heterocycle-substituted difluoroacetic acid derivative having a partial structure represented by the formula (III), by reacting an N-oxido aromatic heterocyclic compound having a partial structure represented by the formula (I) with tetrafluoroethylene in the presence of a compound represented by the formula (II): R—YH, in a solvent selected from an aromatic hydrocarbon solvent, an ester solvent and an ether solvent:

The invention relates to the field of electric wires and cables, and discloses a high-temperature-oxidation-resistant flame-retardant electric wire and cable and a preparation method thereof.The sheath layer of the electric wire and cable comprises low-density polyethylene, nitrile rubber, natural rubber, ethylene-tetrafluoroethylene copolymer, modified multi-walled carbon nanotubes, modified nano titanium dioxide and auxiliaries; the modified multi-walled carbon nanotube is prepared by reacting an acylating chlorination multi-walled carbon nanotube with a polycyclotriphosphazene derivative; the polycyclotriphosphazene derivative is prepared by reacting hexachlorocyclotriphosphazene with p-aminodiphenylamine and then taking diphenyl dihydroxysilane as a linker; the modified nano titanium dioxide is prepared by the following steps: substituting phenylphosphoryl dichloride with phloroglucinol, then sequentially substituting with 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride and 3-aminopropyltriethoxysilane, and grafting an obtained antioxidant phosphorus-containing coupling agent with nano titanium dioxide. The sheath layer material prepared by the invention has excellent high-temperature oxidation resistance, flame retardance, wear resistance and heat resistance.

The invention discloses an electromagnetic shielding cable for a radio altimeter and a preparation method thereof, and relates to the technical field of cables. The preparation method comprises the following steps: treating ethylene-tetrafluoroethylene copolymer particles, a mixed compatilizer, a chemical foaming agent and a nano nucleating agent by using mixed gas low-temperature plasma containing acrylic acid, performing melt blending by using a double-screw extruder, injecting supercritical carbon dioxide, and performing slow cooling and shock cooling to obtain a three-dimensional porous matrix containing micro-nano cells; the preparation method comprises the following steps: synthesizing ferroferric oxide particles by a solvothermal method, coating a silicon dioxide dielectric layer, and then chemically silvering to prepare ternary core-shell composite particles; modifying the particles with aminopropyltriethoxysilane and a block copolymer to obtain modified composite particles; melting, mixing and granulating the porous matrix and the modified composite particles to obtain the electromagnetic shielding composite material. And performing extrusion molding on a conductor to form an insulation shielding layer, thereby obtaining the cable. The cable has an excellent electromagnetic shielding effect.

A method for producing modified polytetrafluoroethylene including: polymerizing tetrafluoroethylene and a modifying monomer in an aqueous medium in the presence of a polymer (I) containing a polymerization unit (I) based on a monomer represented by the following general formula (I) to obtain a modified polytetrafluoroethylene:wherein X1 and X3 are each independently F, Cl, H, or CF3; X2 is H, F, an alkyl group, or a fluorine-containing alkyl group; A0 is an anionic group; R is a linking group; Z1 and Z2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more. Also disclosed is a composition containing the modified polytetrafluoroethylene and the polymer (I).

The invention discloses a short-process coagulation water purification treatment method and equipment based on a polytetrafluoroethylene membrane. The method relates to the technical field of short-process coagulation water purification treatment, and comprises the following steps: firstly, adding an agent into the electronic industrial wastewater to complete pretreatment, then filtering by adopting a polytetrafluoroethylene membrane to realize water purification, continuously collecting and analyzing short-process coagulation water purification data of the electronic industrial wastewater, and timely optimizing and adjusting a treatment scheme. Pollutants in a water body are converted into micro-flocs by adding a medicament, the micro-flocs are intercepted by a polytetrafluoroethylene membrane to remove the pollutants in the water body, a real-time monitoring sensor collects water quality data and membrane operation data, and a short-process coagulation quality quantized value and a purification accuracy quantized value are obtained through further analysis. Compared with a judgment value in a database, the method optimizes a medicament adding scheme and a membrane operation scheme, improves the process applicability, and solves the problems of insufficient accuracy and adaptability of a short-process water purification treatment method in the prior art.

The invention belongs to the technical field of nano composite coatings, and particularly provides an anti-dust-sticking carbon nano polymer coating as well as a preparation method and application thereof. The invention relates to an anti-dust-sticking carbon nano polymer coating which comprises the following raw materials: epoxy resin, polytetrafluoroethylene, a reinforcing medium, a filler, an auxiliary agent and a curing agent, the reinforcing medium is prepared by mixing polyurethane, modified cyclodextrin and graphene, so that stacking among graphene is reduced, and the graphene is effectively dispersed. The ash sticking prevention carbon nano polymer coating prepared by the invention has the advantages of abrasion resistance and corrosion resistance.

The invention discloses a polytetrafluoroethylene composition and a preparation process thereof, and relates to the technical field of high polymer materials, and the preparation process comprises the following steps: mixing plasma activated amido functionalized polytetrafluoroethylene powder with hydrophobic enhanced functionalized boron nitride microspheres under the protection of nitrogen to obtain an interface reactive compound premix; and placing the interface reactive composite premix in a mold, performing hot pressing to initiate an interface chemical bonding reaction between the plasma activated amino functionalized polytetrafluoroethylene powder and the hydrophobic enhanced functionalized boron nitride microspheres and realize surface passivation of the polytetrafluoroethylene powder, and then performing cooling demolding to obtain the polytetrafluoroethylene composition. The polytetrafluoroethylene composition obtained by the invention has high interface bonding strength, ultralow dielectric loss and excellent long-term hygrothermal environment stability, and effectively solves the contradiction between mechanical enhancement and dielectric property degradation and insufficient long-term reliability in the traditional modification technology.

The invention discloses a high-strength, high-temperature-resistant and anti-static polyether-ether-ketone composite material for electronic equipment and a preparation method of the high-strength, high-temperature-resistant and anti-static polyether-ether-ketone composite material. Comprising the following components in percentage by mass: 60%-70% of polyether-ether-ketone, 15%-20% of carbon fibers, 7%-10% of polytetrafluoroethylene, 3%-5% of boron nitride, 1%-3% of carbon nanotubes, 1%-2% of a silane coupling agent and 0.5%-1% of an antioxidant, and the sum of the mass percentages of all the components is 100%. When the prepared polyether-ether-ketone composite material is applied to electronic components, the mechanical strength, the thermal conductivity, the thermal stability, the chemical corrosion resistance and the antistatic property of the polyether-ether-ketone composite material can be further improved while the original excellent temperature resistance of the polyether-ether-ketone can be kept, so that the range of manufacturing and using the material as the electronic components is wider.

The invention relates to the field of cables, and discloses a flame-retardant extruded and insulated low-voltage power cable, which comprises a conductor core, an insulating layer, a filling layer, an inner sheath layer, an armor layer and an outer sheath layer, and is characterized in that the sheath layer is made of low-density polyethylene, ethylene propylene diene monomer, ethylene-tetrafluoroethylene copolymer, modified halloysite nanotubes, modified ammonium polyphosphate and auxiliaries; the modified halloysite nanotube is prepared by loading titanium dioxide on the surface of a halloysite nanotube by using a sol-gel method and then grafting octa-aminopropyl polyhedral oligomeric silsesquioxane; the modified ammonium polyphosphate is prepared by grafting a functional silane coupling agent prepared by reacting a cyclotriphosphazene derivative with 3-chloropropyltrimethoxysilane with polysiloxane-coated ammonium polyphosphate, and the cyclotriphosphazene derivative is prepared by reacting 3-amino-1, 2, 4-triazole with hexachlorocyclotriphosphazene and then coordinating with cobalt ions by adopting a hydrothermal method. Therefore, the material is endowed with good mechanical properties, ultraviolet resistance, heat and wear resistance, flame retardance and antibacterial activity.

The invention provides a preparation method of alpha, omega-diiodo perfluoroalkane, and belongs to the technical field of iodo perfluoroalkane synthesis. The preparation method disclosed by the invention comprises the following steps: under a protective atmosphere, enabling a nano flower type magnesium fluoride catalyst, 1, 2-diiodo tetrafluoroethane and tetrafluoroethylene to react, so as to obtain 1, 4-diiodo perfluorobutane and 1, 6-diiodo perfluorohexane. The nano flower type magnesium fluoride catalyst has high specific surface area and abundant coordination unsaturated sites, can effectively activate reactant molecule bonding sites, and avoids the problems of side reaction and catalyst deactivation caused by free radical paths; by optimizing the pore structure and reaction conditions of the catalyst, efficient synergistic conversion of IPF-2 and TFE can be realized, and the selectivity and yield of IPF-4 and IPF-6 are remarkably improved. The method provided by the invention has the advantages of mild conditions, safe operation, adjustable product distribution and the like, and meets the requirements of industrial production on high-selectivity fluorine-containing bifunctional compounds.

The invention provides perfluorosulfonic acid resin and a polymerization method. The polymerization method comprises the following steps: mixing perfluoromethyl vinyl ether, perfluorosulfonyl fluoride vinyl ether and a fluorine-containing solvent to obtain a mixed solution; and adding an initiator into the mixed solution, introducing a tetrafluoroethylene monomer, carrying out a copolymerization reaction, carrying out solid-liquid separation, and carrying out transformation and drying to obtain the perfluorinated sulfonic acid resin. The perfluoromethyl vinyl ether monomer is introduced into a copolymerization system, so that the rigidity of a polymer main chain is effectively reduced, and the flexibility and low-temperature mechanical strength of the resin are enhanced; the crystallinity is effectively reduced, the Tg is adjusted, and the catalyst is suitable for low-temperature proton exchange membrane fuel cells and other application scenes; the introduction of perfluoromethyl vinyl ether improves the compatibility between the main chain and the sulfonyl fluoride-containing side chain, and is beneficial to the formation of a clearer and more continuous hydrophilic / hydrophobic microphase separation structure. A stable proton conduction network is facilitated, and the electrochemical performance of the resin under harsh working conditions is remarkably improved.

The invention belongs to the technical field of nano composite materials, and particularly provides a corrosion-resistant flexible carbon nano polymer coating and a preparation method thereof, and the corrosion-resistant flexible carbon nano polymer coating comprises phenolic resin, bisphenol F epoxy resin, GO-NH2, self-repairing polyimide, a BYK-011 defoaming agent, talcum powder, polytetrafluoroethylene, a BYK333 flatting agent, silicon carbide, a B215 composite antioxidant, a UV531 ultraviolet light absorber and cardanol. The corrosion-resistant flexible carbon nano polymer coating prepared by the invention has excellent mechanical strength and wear resistance, good flexibility, efficient self-repairing capability and lasting corrosion resistance, the service life of the coating can be effectively prolonged, and the protection requirement in a severe environment is met.

The invention provides a powder coating gypsum board with scratch resistance and a preparation method thereof, and belongs to the technical field of paints.The preparation method comprises the following steps that modified polyester, modified glass beads, polytetrafluoroethylene, barium sulfate, titanium dioxide, a flatting agent and a curing agent are mixed and stirred, melt extrusion is conducted, tabletting is conducted after cooling, smashing, grinding and sieving are conducted, and the powder coating gypsum board is obtained. Powder coating is obtained; and sanding and dedusting the surface of the gypsum board substrate, electrostatically spraying the powder coating onto the surface of the substrate, heating, curing and cooling to obtain the gypsum board. Wherein the modified polyester is prepared from polyester, a reinforcing agent and 3-glycidyl ether oxypropyl triethoxy silane. The powder coating gypsum board prepared by the invention has excellent scratch resistance, impact resistance and wear resistance.

The invention belongs to the technical field of ETFE thin film preparation, and particularly relates to a preparation method of an ETFE thin film for semiconductor packaging. The invention relates to a preparation method of an ETFE film for semiconductor packaging. The preparation method comprises the following steps: (1) preparing a tetrafluoroethylene-glycidyl methacrylate copolymer; (2) pretreating the ETFE resin; (3) carrying out silanization treatment on the nano composite filler; (4) preparing an ETFE film; and (5) carrying out post-treatment on the ETFE film to prepare the ETFE film for semiconductor packaging. The ETFE film for semiconductor packaging, prepared by the preparation method disclosed by the invention, has excellent mechanical properties and wear resistance.

Provided are: a copolymer comprising a unit A based on tetrafluoroethylene and a unit B based on a compound represented by formula (1) CF2=CF-CF2-O-Rf1, wherein the content of the unit B is more than 2.0 mol% and at most 6.0 mol% with respect to all units contained in the copolymer, the total content of the unit A and the unit B is at least 90.0 mol% with respect to all units contained in the copolymer, and the total number of functional groups per 106 main-chain carbon atoms in the copolymer is less than 150; a composition containing said copolymer; and a molded body of said composition.

This invention relates to the field of polytetrafluoroethylene (ePTFE) membrane technology. Addressing the problem that existing expanded PTFE films cannot meet the high-performance standards of superhydrophobicity and superoleophobicity, this invention specifically discloses an expanded PTFE composite membrane and its preparation method. The expanded PTFE composite membrane includes an ePTFE base membrane and an fPTFE / SiO2 particle composite layer disposed on the surface of the ePTFE base membrane. The fPTFE / SiO2 particle composite layer includes a PTFE composite and SiO2 particles. The PTFE composite comprises polyethylene oxide and PTFE in a dry weight ratio of 1:10-30, and the SiO2 particles have a particle size of 100-1000 nm. By coating the ePTFE base membrane with PTFE and SiO2 particles to construct the fPTFE / SiO2 particle composite layer, and then modifying the membrane surface with silica-fluorination, the distribution of SiO2 particles can be specifically controlled to impart superhydrophobic and superoleophobic properties to the expanded PTFE composite membrane, with both water and oil contact angles >150°.

The invention relates to the technical field of coating preparation, and provides a super-hydrophobic oleophobic epoxy anticorrosive wear-resistant powder coating and a preparation method thereof. According to the coating, phenolic epoxy resin and bisphenol A epoxy resin are used as matrix resin, phenolic hydroxyl resin is used as a curing agent, super-hydrophobic / oleophobic carbon nanotubes are used as a modifier, ethylene-tetrafluoroethylene copolymer and polyamide resin are used as flexibilizers, super-hydrophobic / oleophobic nano silicon dioxide powder and super-hydrophobic hollow glass beads are used as fillers, and the super-hydrophobic / oleophobic nano silicon dioxide powder and the super-hydrophobic hollow glass beads are used as fillers. The super-hydrophobic and oleophobic epoxy anti-corrosion wear-resistant powder coating is prepared by taking an inorganic pigment as a coloring agent through the steps of material preparation, premixing, melt extrusion, tabletting, cooling, crushing and sieving under the cooperation of various functional assistants. The powder coating is subjected to electrostatic spraying (40-70 KV), the coating film thickness is about 350 microns, and the powder coating is cured into a film after being subjected to hydrophobic / oleophobic min at 180 DEG C / 5 min or 230 DEG C / 1.5 under the baking condition of 180 DEG C / 5 min. The contact angles of oil drops and water drops can reach 160 degrees and 161 degrees respectively, and the rolling angles are 2 degrees and 1 degree respectively.

The invention belongs to the technical field of medical materials, and particularly relates to an oral liquid film-covered rubber plug and a preparation method thereof.The oral liquid film-covered rubber plug is characterized in that vulcanized halogenated butyl rubber serves as a base material piece, a functional film is bonded to the surface of the base material piece through a hot-pressing composite technology, and the functional film is prepared by taking ethylene-vinyl acetate copolymer with the VA mass ratio being 28-33% as a base material layer; an ethylene-vinyl acetate copolymer with the mass ratio of VA being 18-22% is used as a transition layer, and polytetrafluoroethylene or high-density polyethylene is used as a functional layer. The novel laminated rubber plug with excellent sealing performance, chemical stability and sterilization compatibility is prepared by utilizing a gradient composite structure and a multi-step process optimization technology, and the laminated rubber plug is simple in preparation method, easy to process and form and wide in application prospect.

The invention provides a nylon composite material as well as a preparation method and application thereof, and belongs to the technical field of nylon composite materials. The nylon composite material comprises the following raw materials in parts by mass: 35-75.5 parts of nylon resin; 20 to 40 parts of glass fiber; 2-15 parts of a wear-resistant agent; 1 to 5 parts of silicone; 1-5 parts of a compatilizer; 0.5 to 1 part of an antioxidant; 0.5 to 1.5 parts of a lubricant; 0.5 to 1.5 parts of a coloring agent; the wear-resistant agent comprises more than one of ultra-high molecular weight polyethylene, a hyperbranched polymer, polytetrafluoroethylene and silicone oil. The nylon composite material is prepared by compounding the nylon resin, the glass fiber, the wear-resistant agent, the silicone, the compatilizer, the antioxidant, the lubricant and the coloring agent, so that the wear resistance and the melt strength of the nylon composite material are remarkably improved, meanwhile, the nylon composite material has excellent machinability and mechanical properties, the machinability and the dimensional precision of wear-resistant products can be improved, the service life of the wear-resistant products can be prolonged, and the processing efficiency can be improved.

The invention relates to the technical field of cables, and provides a corrosion-resistant aerial insulated cable and a manufacturing method thereof. A corrosion-resistant overhead insulated cable sequentially comprises a conductor, a shielding layer and an insulating layer from inside to outside, and the insulating layer is prepared from the following raw materials in parts by weight: 65-75 parts of high-density polyethylene, 5-7 parts of modified kaolin, 13-17 parts of ethylene-tetrafluoroethylene copolymer, 0.5-2 parts of antioxidant, 1-3 parts of plasticizer, 8-10 parts of flame retardant and 0.5-1.5 parts of lubricant; wherein the modified kaolin is prepared by the following steps: firstly, modifying kaolin by vinyltriethoxysilane for the first time to obtain silanized kaolin, and then modifying the silanized kaolin by lauryl amine dipropylidene diamine and gamma-glycidyl ether oxyethyl trimethoxysilane for the second time. According to the technical scheme, the problem of poor corrosion resistance of the overhead insulated cable in the prior art is solved.

The invention provides a wear-resistant coating and a preparation method thereof, relates to the technical field of air bearings, and solves the technical problems that an existing air bearing coating is large in friction coefficient, insufficient in high temperature resistance, large in wear-resistant weight loss value and incapable of meeting the requirement for long start-stop service life. According to the wear-resistant coating, alcohol-soluble silane resin and high-temperature-resistant resin in a specific proportion are used as binder matrixes, lubricating wear-resistant fillers such as molybdenum disulfide and polytetrafluoroethylene are compounded, and a solvent and assistant system is optimized. The coating provided by the invention has the characteristics of low friction, high wear resistance and high temperature resistance, and can meet the use requirements of the air bearing under severe working conditions.

The invention relates to the technical field of adhesives, in particular to a high-temperature adhesive with a low thermal expansion coefficient and a preparation method of the high-temperature adhesive. The preparation method of the binder comprises the following steps: irradiating polytetrafluoroethylene microspheres and a sodium fluoride adsorbent together in an aerobic environment to obtain mixed powder; dissolving the mixed powder in deionized water, standing, filtering and drying to obtain irradiation cracking polytetrafluoroethylene microspheres; the preparation method comprises the following steps: dissolving acrylamide in ethanol, uniformly dispersing, adding irradiation pyrolysis polytetrafluoroethylene microspheres, and continuously stirring to uniformly disperse the microspheres; then carrying out secondary irradiation treatment; after the irradiation is completed, filtering, washing and drying to obtain amino modified polytetrafluoroethylene microspheres; the preparation method comprises the following steps: preheating epoxy resin, then adding amino modified polytetrafluoroethylene microspheres, and completely mixing and stirring to obtain a mixed solution; and adding a curing agent into the mixed solution, continuously stirring uniformly, standing and defoaming to obtain the high-temperature binder. The adhesive is suitable for bonding in a high-temperature environment.

The utility model relates to sewing thread technical field, specifically is a kind of anti-abrasion polytetrafluoroethylene sewing thread, including shell, backflow subassembly and sewing thread, the top of shell is provided with backflow subassembly, oil reservoir is opened in the shell, the wire roller is rotatably connected in the oil reservoir by pivot, the surface of wire roller is wound and is connected with sewing thread;By increasing auxiliary lubricating mechanism, using the mode of auxiliary lubrication, reduce the friction coefficient, improve the anti-abrasion performance of sewing thread use, to improve the use effect.

The utility model discloses a polytetrafluoroethylene particle recovery device, which relates to the field of polytetrafluoroethylene particle recovery, and comprises a recovery device body, a crushing bin is arranged in the recovery device body, a bearing is arranged in the crushing bin, the end part of the bearing is connected with a first motor, the outer wall of the bearing is provided with crushing blades, and the crushing blades are connected with the first motor. A material distributing bin is arranged at the bottom of the smashing bin, a filtering assembly is installed in the material distributing bin, a conveying bin is arranged on one side of the recycling device body, and a conveying assembly is installed in the conveying bin. According to the utility model, the crushing blades in the crushing bin crush polytetrafluoroethylene wastes, and polytetrafluoroethylene blocks which are not crushed into particles slide into the conveying bin through the material conveying inlet pipeline and then are conveyed by the spiral conveyor, so that the polytetrafluoroethylene blocks return to the crushing bin again; and the crushing blades in the crushing bin perform secondary crushing on the polytetrafluoroethylene blocks, so that the polytetrafluoroethylene waste can be fully crushed.