159 results about "Tetrafluoroethylene" patented technology

This utility model discloses a PTFE-lined steel storage tank with an internal reinforcing structure, relating to the technical field of PTFE-lined steel storage tanks. It includes a tank body with a reinforcing assembly installed inside. The reinforcing assembly enhances the stability of the tank body and includes a cross-shaped support frame, a first stabilizing plate, a second stabilizing plate, a third stabilizing plate, and a fourth stabilizing plate. The first, second, third, and fourth stabilizing plates are respectively installed at one end of the cross-shaped support frame and fixed to the inner wall of the tank body. This utility model, by fixing the first, second, third, and fourth stabilizing plates to the inner wall of the tank body, provides internal support for the tank body, thereby increasing its stability and pressure resistance.

The application relates to the technical field of fluorine-containing iodoalkane preparation, in particular to a preparation method of high-carbon-number diiodoperfluoroalkane, which comprises the following steps: reacting tetrafluoroethylene and elemental iodine to generate diiodotetrafluoroethane; and under the action of a catalyst, the diiodotetrafluoroethane is subjected to telomerization reaction with tetrafluoroethylene to generate high-carbon-number diiodoperfluorobutane and diiodoperfluorohexane; and the catalyst is a metal nickel catalyst supported on silicon dioxide. The metal nickel catalyst supported on silicon dioxide is used to make the diiodotetrafluoroethane and the tetrafluoroethylene subjected to telomerization reaction to obtain diiodoperfluoroalkane with higher carbon number. The application has the advantages of simple process, low reaction temperature and the like, and can significantly improve the yield of diiodoperfluorobutane and diiodoperfluorohexane.

This invention discloses a high-wear-resistant polytetrafluoroethylene (PTFE) membrane material and its preparation method, relating to the field of PTFE membrane material technology. The high-wear-resistant PTFE membrane material prepared by this invention includes PTFE, wear-resistant filler, lubricant, and composite surfactant. The composite surfactant is obtained by reacting maleic acid derivatives with polyethylene glycol derivatives. The maleic acid derivative is obtained by reacting hydroxyethyl methacrylate, styrene, silane coupling agent KH570, POE, and maleic anhydride. The polyethylene glycol derivative is obtained by reacting 4-imidazolium formaldehyde with mono-amino-terminated polyethylene glycol. This process improves wear resistance while giving the PTFE membrane anti-fouling properties. The wear-resistant filler is obtained by reacting brominated cyclohexylmethyl dimethoxysilane with nano-silica, followed by coating with a perfluoropolyether block copolymer. This process improves wear resistance while the introduced perfluoropolyether further enhances anti-fouling properties.

The application relates to the technical field of electric wire and cable, and discloses a fluoroplastic insulation high-temperature-resistant fireproof cable and a preparation method, the cable comprises a conductor layer, the conductor layer is twisted by multiple copper wires, the conductor layer is coated with a fluoroplastic insulation layer, the fluoroplastic insulation layer is coated with a shielding layer, the shielding layer is a copper-belt woven structure, the shielding layer is coated with an armor layer, the armor layer is woven by stainless steel wires, the armor layer is coated with a sheath layer, and the sheath layer comprises the following components in mass fractions: functionalized ethylene-tetrafluoroethylene copolymer, 50-70 parts by mass. The application constructs an interpenetrating polymer network formed by in-situ crosslinking of a functionalized fluoropolymer and an organic silicon elastomer in the sheath layer, and adopts an energy field gradient response vulcanization process, so that the prepared cable sheath keeps the inherent high-temperature resistance of fluoroplastic, and the flexibility and mechanical strength of the material are improved.

The application provides a polytetrafluoroethylene / polyamide subcomposite fiber membrane and a preparation method and application thereof. The preparation method of the polytetrafluoroethylene / polyamide subcomposite fiber membrane comprises the following steps: providing a spinning solution and performing electrostatic spinning, performing heat treatment after obtaining a fiber membrane, and finally obtaining a polytetrafluoroethylene / polyamide subcomposite fiber membrane; the spinning solution comprises a spinning aid, polytetrafluoroethylene and a polyamide acid salt; the spinning aid is selected from one or more of polyethylene oxide, polyvinylpyrrolidone and polyvinyl alcohol. The composite fiber membrane prepared by the technical scheme has good hydrophobicity and good wet resistance, and has uniform and stable pore structure, good pore connectivity and good air permeability of the membrane, and is very suitable for being used in the fields of membrane distillation and the like.

The utility model discloses an extruder for polytetrafluoroethylene-based composite material production, and relates to the technical field of composite material production, the extruder comprises a shell, an extrusion mechanism is arranged in the shell, a heating mechanism is arranged in the shell, the extrusion mechanism comprises a groove, the inner wall of the groove is fixedly connected with a sliding chute, and the sliding chute is connected with the heating mechanism. Through the arrangement of the moving plate, the first bolt can be screwed out, then the moving plate slides in the sliding groove, so that other molds are aligned with the material extruding barrel, then the first bolt is screwed in the moving plate to fix the position of the moving plate, then the motor is started, the motor enables the rotating shaft to rotate at the moment, and the rotating shaft is rotated. And then the rotating shaft drives the first gear to rotate, and through the moving plate capable of sliding in the sliding groove, the effects that materials of different shapes can be extruded according to specific requirements, extruded products of different shapes can directly meet the final application requirements, the later machining steps are reduced or avoided, and therefore the production efficiency is improved are achieved.

A roll forming device for recycled polytetrafluoroethylene (PTFE) strip includes a base, a column, a double-threaded rod, a hexagonal head, a positioning pin clamp, a second roller frame, and a pressure roller. The base has a connecting platform on its side. The upper part of the base is fixedly connected to the column. The upper part of the column is fixedly connected to a frame. The front part of the frame is fixedly connected to a cylinder frame. The cylinder frame has a guide groove on its side. The upper part of the lifting frame has a guide rod. The lifting frame is adapted to the guide rod and is connected to it. The guide rod slides inside the lifting frame. The upper part of the guide rod has a limit. The front part of the cylinder frame is fixedly connected to a cylinder. The lower part of the cylinder is fixedly connected to the lifting frame. The lifting frame has a cantilever on its side. The front part of the column and the lower part of the cantilever are both fixedly connected to the first roller frame.

The present invention provides a method for producing a PTFE (polytetrafluoroethylene) film, comprising the steps of: preparing a PTFE composition comprising first PTFE particles, second PTFE particles, and an additive; extrusion molding the PTFE composition to produce a PTFE sheet; and stretching the PTFE sheet. Furthermore, the present invention provides a PTFE film and a filter.

The utility model discloses a four fluorine tubular product processing device, including base, the base downside four corners part all is provided with the moving wheel, the base upside both sides all are provided with the stand, the stand front side evenly is provided with the jack, the stand inboard both sides all are provided with the assembly frame, the assembly frame both sides all are provided with the U type frame, the U type frame with the stand plug connection, the utility model relates to four fluorine tubular product processing technical field, the beneficial effect of the case is: through setting up two symmetrical assembly frames on the stand both sides, and setting up arc limit block on the assembly frame front and back both sides, when using, can carry out vertical direction's limit fixed operation to multiple four fluorine tubes, then cooperate water removal subassembly, can reach four fluorine tube quick airing dry's purpose, and the distance between two assembly frames is adjustable, and operating personnel can adjust the assembly frame position according to the length of the assembly pipe, is suitable for different specifications four fluorine tubes.

The present invention provides a method for producing a fluoropolymer, characterized in that the method comprises a step of producing a fluoropolymer by polymerizing a fluoromonomer containing tetrafluoroethylene, in a solution containing perfluorodiacyl peroxide and a fluorosolvent, by continuously adding the tetrafluoroethylene into a reaction vessel; the polymerization is suspension polymerization; the perfluorodiacyl peroxide is represented by the following formula (1); the fluorosolvent is at least one selected from the group consisting of perfluorocarbons, hydrofluorocarbons, and fluorine-containing ethers; the content of the perfluorodiacyl peroxide in the solution is 5 to 30 mass% relative to the total liquid; and the fluoropolymer has a polymerization unit based on tetrafluoroethylene.(C5F 11 COO)2(1), wherein the C5F 11 group is linear.

The present disclosure provides a thermoplastic polymer composition comprising a fluororesin (A), a crosslinked fluoroelastomer (B), and magnesium oxide (C), wherein the fluororesin (A) is a copolymer that contains ethylene unit and tetrafluoroethylene unit; wherein the crosslinked fluoroelastomer (B) is obtained by subjecting a fluoroelastomer (b) to a dynamic crosslinking treatment in the presence of the fluororesin (A), the magnesium oxide (C), and a cross-linking agent (D) under conditions for melting the fluororesin (A); wherein the magnesium oxide (C) has a volume-based 10% particle size of 1.0 μm or less; and wherein a mass ratio between the fluororesin (A) and the crosslinked fluoroelastomer (B) ((A) / (B)) is 50 / 50 to 95 / 5.

A film for a battery exterior body has a thickness of 10 μm or greater, including a heat-meltable tetrafluoroethylene-type polymer having 50 or more carbonyl group-containing groups per 106 carbon atoms in its main chain and a fluorine content of from 60% by mass to 75% by mass.

A method for producing a fluoropolymer by solution polymerization or dispersion polymerization, the method including: in the presence of an initiator, a chain transfer agent, and a solvent, (i) homopolymerizing tetrafluoroethylene; or (ii) randomly copolymerizing tetrafluoroethylene and at least one of a monomer represented by the following formula (1) or a monomer represented by the following formula (2). The chain transfer agent includes at least one selected from dithioester compounds, dithiocarbamate compounds, trithiocarbonate compounds and xanthate compounds. The fluoropolymer contains 50 to 100 mol % of a polymerized unit based on the tetrafluoroethylene. The formula (1): CF2═CR1R2 wherein R1 and R2 are as defined herein, the formula (2): CH2═CR3R4 wherein R3 and R4 are as defined herein.

The application discloses a three-layer composite material for a gear pump and a preparation method thereof. The composite material comprises a metal base layer, a copper powder layer sintered on one side of the metal base layer, and a plastic layer embedded in and covering the copper powder layer. The plastic layer is prepared from the following components: calcium fluoride, ETFE, nano-aluminum oxide, graphite, iron red, and PTFE emulsion. ETFE is a tetrafluoroethylene-ethylene alternating copolymer. ETFE has a certain blending compatibility with the PTFE plastic matrix, and can form better bonding force in a sintered state. The calcium fluoride material has the characteristics of low-temperature brittleness and high-temperature plasticity. Under high-speed and high-load conditions, the high-plasticity calcium fluoride is easy to combine with PTFE under the influence of friction heat, and the transfer and consumption process can be more smooth, thereby improving the product performance. Through the cooperation of the components, the obtained plastic layer has high bonding strength, and the running time under continuous pressure durability test is significantly improved.

This invention provides a method for preparing pentafluoroethyl trifluoromethyl ether. The method includes the following steps: reacting fluorooxytrifluoromethane and tetrafluoroethylene in a solvent under light and in the presence of an inert gas. This method has advantages such as high yield and simple synthesis process, and has certain industrial application value.

A method for manufacturing an aqueous dispersion, wherein, in the presence of an aqueous medium and in the absence of a substantially non-fluorinated emulsifier, a first monomer comprising tetrafluoroethylene is polymerized in the presence of a compound of formula (X) and a polymerization initiator to produce an aqueous dispersion comprising particles of a first fluoropolymer having an average particle size of less than 500 nm and having no melting point. C(X) 1 (X) 2 )=C(X 3 In formula (X), X -L-Z (X) 1 X 2 and X 3 Each is independently a hydrogen atom, a fluorine atom, a perfluoromethyl group, or an alkyl group; L is a single bond or a divalent linking group; and Z is an anionic group or a salt of anionic groups.

A tetrafluoroethylene-based polymer composition for use as an adhesive in electrochemical devices is provided, which can reduce the resistance of electrochemical devices and also provide adhesive sheets with excellent adhesion to substrates. This is further explained by the use of the same composition in adhesives, electrode adhesives, electrodes, and secondary batteries for electrochemical devices. Specifically, a tetrafluoroethylene-based polymer composition for use as an adhesive in electrochemical devices is provided, wherein the tetrafluoroethylene-based polymer composition has polar groups, the content of which is less than 0.020 meq / g relative to the tetrafluoroethylene-based polymer composition, the tetrafluoroethylene-based polymer composition is non-melt processable, and the apparent density is less than 0.50 g / ml.

This invention relates to the technical field of copper foil substrate cleaning equipment. The ultrasonic cleaning machine for polytetrafluoroethylene (PTFE) copper foil substrates includes a main housing with a cleaning tank inside. A heating tube and an ultrasonic cleaning unit are embedded within the main housing. A support basket is placed inside the cleaning tank, and a substrate clamping mechanism is mounted on the support basket. The substrate clamping mechanism holds the copper foil substrate and is equipped with a double eccentric wheel mechanism. The invention uses a fixed support rod to drive the upper eccentric wheel to rotate, and a gear meshing mechanism to drive the lower eccentric wheel to rotate synchronously in the opposite direction. Through the geometric characteristics of the eccentric wheels, the lower eccentric wheel drives the support rod of the turbulence-driven mechanism to periodically reciprocate and oscillate. The protrusions on the support rod intermittently push the copper foil substrate, causing it to sway slightly around the lifting rod. This slight sway disrupts the boundary layer on the substrate surface, accelerating the removal of peeled impurities and ensuring effective cleaning.

Provided is an injection molded article including a pipe body section forming a flow path of a fluid, and a flange section formed on one end or both ends of the pipe body section, wherein the maximum thickness of the flange section is 2 to 12 mm, the injection molded article contains a copolymer containing tetrafluoroethylene unit and a fluoro(alkyl vinyl ether) unit, the content of the fluoro(alkyl vinyl ether) unit of the copolymer is 2.8 to 6.0% by mass with respect to the whole of the monomer units, the melt flow rate at 372° C. of the copolymer is 4.0 g / 10 min or higher and lower than 11.0 g / 10 min, and the number of functional groups of the copolymer is 50 or less.

This invention provides a hydrogen sensor based on nanoparticles, its preparation method, and its application, belonging to the field of hydrogen sensor technology. The nanoparticle-based hydrogen sensor provided by this invention includes a substrate and at least one pair of electrodes spaced apart on the surface of the substrate. The substrate surface between the electrodes is covered with nanoparticles, and the electrode surfaces and nanoparticle surfaces are covered with a thin film layer. The nanoparticles include one or more of palladium nanoparticles, platinum nanoparticles, and alloy nanoparticles, wherein the alloy nanoparticles contain palladium and / or platinum. The material of the thin film layer includes one or more of polymethyl methacrylate, naphthol, silica, alumina, polytetrafluoroethylene, diamond-like carbon film, silicon nitride, and silicon carbide. The nanoparticle-based hydrogen sensor provided by this invention has high sensitivity and excellent stability, enabling rapid and accurate determination of hydrogen in an air environment.

The application discloses a PVC protective glove and a preparation method thereof and belongs to the technical field of PVC gloves. The method comprises the following steps: step 1: taking PVC paste resin as a base material, adding a viscosity reducer, a plasticizer, a modified filler, a liquid barium-zinc stabilizer, water-based PU glue and deionized water, stirring for 5-8 min, then sealing and aging at 45 DEG C for 1-2 h to obtain aged glue slurry; step 2: pre-treating the surface of a ceramic hand mold, spraying polytetrafluoroethylene release agent after drying, drying again, then vertically immersing in the aged glue slurry, demolding after curing and cooling, then post-treating and drying to obtain the PVC protective glove. The application realizes the uniform dispersion and strong interface combination of the modified filler in the PVC matrix by precisely controlling the surface modification structure of the filler and the amount of the filler in the formula, and effectively improves the mechanical properties and heat aging resistance of the glove.

In this method for producing tetrafluoroethylene and octafluorocyclobutane, 1,1,1,2,2-pentafluoroethane is converted into tetrafluoroethylene and octafluorocyclobutane in a gas phase in the presence of silicon oxide. In this conversion, no diluent is used, or 60 vol% or less of a diluent is used relative to the total amount of 1,1,1,2,2-pentafluoroethane and the diluent.

The utility model belongs to the polytetrafluoroethylene material processing equipment field, disclose a kind of for polytetrafluoroethylene material's static degreasing oven and oil gas recovery system, comprising: static degreasing oven is equipped with the oven body for placing polytetrafluoroethylene material, heating device, the sealing door and material bearing device for ensuring airtightness;Oil gas recovery system is communicated with oven by suction duct, sequentially including first stage condenser, second stage condenser, oil gas separator, liquid collection tank and the induced draft fan generating negative pressure;Control system is used to regulate and control heating temperature, degreasing time and oil gas recovery system operation.The utility model can realize the uniform heating and efficient degreasing of polytetrafluoroethylene material by optimizing the internal structure of oven and efficient multistage condensing recovery path, significantly improve oil gas recovery rate, reduce environmental pollution, and enhance equipment operation safety.

The application discloses a cleaning process for reducing the particle number of a semiconductor polytetrafluoroethylene component. The process comprises the following steps: step one, an organic pretreatment step; step two, an alkali cleaning step; step three, a first physical cleaning step; step four, an SC-2 cleaning step; step five, a second physical cleaning step; and step six, a frequency division ultrasonic cleaning step. The component treated in step five is sequentially subjected to low-frequency ultrasonic cleaning and high-frequency ultrasonic cleaning in a dust-free room environment, and the cleaning process is accompanied by overflow of ultrapure water. Through the organic combination of the "organic pretreatment", "alkali cleaning chemical action", "SC-2 oxidation / dissolution action", "high-pressure physical stripping" and "frequency division ultrasonic cavitation", the application realizes the comprehensive, efficient and stable removal of the particles on the PTFE surface from the micron level to the submicron level.

The detection method can be used to detect the presence of uranium hexafluoride (UF6) in a gas stream (G). The detection method comprises humidifying the gas stream by circulating the gas stream (G) in contact with a sulfonated tetrafluoroethylene-based fluoropolymer copolymer, in particular Nafion, and then detecting the presence of hydrogen fluoride (HF) in the gas stream (G) by means of a sensor.

This utility model discloses an oil wellhead process pipe assembly and an oil wellhead device, including a diversion end component and a combined pipe component. Combined pipe components are horizontally installed on both sides of the diversion end component, and a regulating valve component is connected to the end of the combined pipe component furthest from the diversion end component. Furthermore, a bend component is connected to the end of the regulating valve component furthest from the combined pipe component. This oil wellhead process pipe assembly and device, through the modular structural arrangement of the diversion end component, combined pipe component, regulating valve component, bend component, and capping component, achieves arbitrary combination, expansion, and splicing of the device structure. This allows the oil wellhead process pipe assembly to adapt to the needs of oil wellheads of different sizes and complexities, greatly enhancing the versatility and flexibility of the equipment. The surface is coated with a protective coating made of polytetrafluoroethylene (PTFE). This design not only improves the corrosion resistance of the equipment but also extends its service life.

The utility model relates to the technical field of ozone generator, specifically relates to a kind of ozone generator gas outlet end anti-backflow water device, including ozone generator cylinder, gas return water pipeline, pipeline drainage device, pipeline return water detection device and program console, ozone gas pipeline one is fixedly connected on ozone gas outlet port, the left end of ozone gas pipeline one is fixedly connected U-shaped pipe, the top of U-shaped pipe is fixedly connected ozone gas pipeline two, drain pipe is fixedly connected in the bottom of U-shaped pipe, stainless steel cylindrical body is fixedly connected in the left side of drain pipe, the inner wall of stainless steel cylindrical body is threadedly connected tetrafluoroethylene insulation column, the top of tetrafluoroethylene insulation column is threadedly connected positive electrode column. The utility model is provided with pipeline drainage device and pipeline return water detection device, can make program console automatic signal acquisition and make automatic operation electric valve, and operation control is simple and practical effective, and it is efficient, energy-saving and environment-friendly.