1594 results about "Tetrafluoroethylene" patented technology

A production method for an aqueous dispersion according to the present invention comprises polymerizing a first monomer that includes tetrafluoroethylene in the presence of a compound represented by formula (X) and a polymerization initiator under conditions in which an aqueous medium is present but an emulsifier that includes fluorine atoms is substantially absent to produce an aqueous dispersion that includes particles of a first fluorine-containing polymer that has an average particle diameter of no more than 500 nm and does not have a melting point.　Formula (X): C(X1)(X2)=C(X3)-L-Z. In formula (X), X1, X2, and X3 are each 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 an anionic group.

A fluoroelastomer production method including a step in which monomers A comprising a compound represented by CX1X2=CX3-L-Z, a cyano-group-containing monomer, and at least one compound selected from the group consisting of tetrafluoroethylene, fluorine-containing vinyl ethers, and fluorine-containing allyl ethers are polymerized in an aqueous medium under conditions that substantially no fluorine-atom-containing emulsifier is present.

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 polytetrafluoroethylene film with high tensile strength and a preparation process thereof, and relates to the technical field of polytetrafluoroethylene films. The preparation method comprises the following steps: step 1, preparing a composite raw material: S1-1, sequentially putting a tetrafluoroethylene copolymer into acetone and methanol to be soaked, washed and dried; dispersing in a glycidyl methacrylate-methanol solution, and carrying out irradiation grafting in a nitrogen atmosphere; filtering, washing and drying to obtain an epoxy tetrafluoroethylene copolymer; s1-2, sequentially putting an epoxy tetrafluoroethylene copolymer and a composite filler into tetrahydrofuran, stirring for 24-48 hours at the temperature of 70-75 DEG C in a nitrogen atmosphere, filtering, washing and drying to obtain a composite raw material; 2, mixing polytetrafluoroethylene, the composite raw material and carboxylated polyphenylene sulfide to obtain a mixture; performing cold press molding and temperature-controlled sintering to obtain a basic film; 3, the basic film is subjected to turning forming and continuous rolling, and the polytetrafluoroethylene film is obtained.

The invention relates to the field of materials, and provides an asynchronous stretching polytetrafluoroethylene film with high aperture uniformity and a preparation method thereof. The method comprises the following steps: mixing polytetrafluoroethylene dispersion resin with mixed lubricating oil, curing, and then obtaining the polytetrafluoroethylene film through pre-pressing extrusion, multi-module longitudinal stretching and expanding and sizing, wherein the longitudinal stretching module is provided with three sections of temperature zones which are sequentially and adjacently connected, namely a core stretching deoiling zone, a high-temperature activation zone and an annealing rolling zone. Oil-containing stretching is realized by matching mixed lubricating oil with gradient temperature configuration and precise control of stretching speed in a longitudinal stretching stage, and meanwhile, controllability of pore size and high uniformity of pore size are realized by matching proper process parameters such as two-way stretching temperature, speed and multiple; the membrane can be applied to various different scenes as a filtering material.

The invention provides a perfluoroether rubber sealing element and a preparation method thereof, and the preparation method comprises the following steps: taking tetrafluoroethylene and perfluoroalkyl vinyl ether as comonomers, and carrying out emulsion polymerization under the condition of a vulcanization point monomer and a chain transfer agent to obtain raw perfluoroether rubber; the preparation method comprises the following steps: mixing the raw perfluoroether rubber, the carboxyl fluorinated modified carbon nanotubes, a filler, a vulcanizing agent and an accelerant, and performing first-stage vulcanization and second-stage vulcanization to obtain the perfluoroether rubber sealing element. According to the perfluoroether rubber sealing element and the preparation method thereof provided by the invention, the compressive deformation resistance of the perfluoroether rubber sealing element is improved by adding the carboxyl fluorinated modified carbon nanotubes, so that the sealing element is ensured to meet the sealing requirement of semiconductor equipment.

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 relates to the technical field of metal wires, in particular to a low-voltage aluminum wire and a preparation method thereof, the sectional area of the wire is 35 square millimeters, the wire comprises an aluminum alloy conductor and an insulating layer, the aluminum alloy conductor comprises the following chemical components: 0.7-0.9% of magnesium, 0.4-0.6% of silicon, 0.15-0.25% of copper, 0.08-0.12% of zirconium, 0.05-0.09% of scandium, 0.03-0.07% of silver, 0.01-0.03% of erbium, 0.02-0.04% of vanadium and the balance of aluminum, and the microstructure of the aluminum alloy conductor is in gradient distribution. The center is ultra-fine grains, a transition region contains a nano precipitated phase, the surface layer is of a high-density dislocation and nano precipitated phase synergistic reinforcement structure, the insulating layer is of a double-layer composite structure, the inner layer is a crosslinked polyethylene modified layer, the outer layer is an ethylene-tetrafluoroethylene copolymer modified layer, the electric conductivity is improved to 58% IACS or above, and the tensile strength is improved to 280 MPa or above.

The invention relates to the technical field of compression molding, and particularly discloses a polytetrafluoroethylene powder molding device which comprises a molding press body and further comprises a regulation and control assembly, the regulation and control assembly is arranged on the lower side of a pressing table, and the regulation and control assembly automatically regulates the size of a lower mold exhaust hole according to the powder weight weighed by a feeding assembly and the mold pressure during pressurization. The size of the exhaust hole in the side edge of the lower die can be automatically adjusted through the adjusting and controlling assembly according to the powder weight weighed by the feeding assembly so as to be matched with the pressurized powder amount, the situation that exhaust is excessive or insufficient during powder raw material pressing is prevented, and in the pressurizing process, the pressure of the die is gradually increased, so that the pressure of the die is gradually increased. The opening degree of the exhaust hole is automatically and gradually reduced, transverse cracks are prevented from being caused, and if residual gas in the powder is not fully exhausted in the pressurizing process, the adjusting and controlling assembly can be controlled again through the auxiliary assembly to adjust the exhaust hole of the lower mold, so that the residual gas is exhausted, and the powder compression molding quality is improved.

The invention discloses a technology for manufacturing a thin film by recycling and calendering a polytetrafluoroethylene material, and belongs to the technical field of high polymer material recycling and processing, the technology for manufacturing the thin film by recycling and calendering the polytetrafluoroethylene material comprises the following steps: crushing waste products, and carrying out three-stage screening impurity removal and melt index detection; after being cleaned by supercritical carbon dioxide, the qualified material is mixed with industrial by-product filler, waste tire rubber powder and the like, low-temperature mixing is conducted through a double-screw extruder, and mixing parameters are automatically regulated and controlled through a tension sensor; performing calendaring forming by a five-roller calendaring unit, preheating the first two rollers, performing differential stretching by the middle three rollers, engraving a micro groove by the third roller, and controlling the thickness precision to be + / -3% by an online thickness gauge; the film is slit after being compounded according to requirements, and scrap edges are crushed and recycled. The method realizes efficient recovery of waste polytetrafluoroethylene, and has the advantages of thorough impurity removal, stable performance, environmental protection and energy saving.

The invention relates to the technical field of cables, and provides a flexible corrosion-resistant robot cable, which sequentially comprises a cable core, a shielding layer, an inner sheath layer and an outer sheath layer from inside to outside, and is characterized in that the cable core sequentially comprises a conductor and an insulating layer from inside to outside; the outer sheath layer comprises the following raw material components in parts by weight: 60-70 parts of high-density polyethylene, 15-25 parts of an ethylene-tetrafluoroethylene copolymer, 0.5-1.5 parts of an antioxidant, 1-3 parts of a plasticizer, 8-12 parts of a flame retardant, 10-20 parts of polyethylene glycol diacrylate composite barium sulfate and 1-2 parts of a lubricant; the polyethylene glycol diacrylate composite barium sulfate is prepared from the following raw materials: polyethylene glycol diacrylate, barium chloride and sodium sulfate. According to the technical scheme, the problem of poor corrosion resistance of the robot cable in the prior art is solved.

The invention discloses a polytetrafluoroethylene ceramic membrane and a preparation method and application thereof, and the preparation method comprises the following steps: (1) adding polytetrafluoroethylene and a binder into water, and carrying out first mixing to obtain polytetrafluoroethylene slurry; adding a carbon nanotube and a dispersing agent into water, and carrying out secondary mixing, so as to obtain a carbon nanotube dispersion liquid; (2) carrying out third mixing on the carbon nanotube dispersion liquid and the polytetrafluoroethylene slurry to obtain a membrane preparation liquid; and (3) coating the surface of a ceramic support with the membrane preparation liquid, drying, and carrying out microwave sintering. The PTFE / ceramic composite membrane is prepared by microwave sintering, so that the sintering time and the production period are obviously shortened, and the production efficiency and the energy utilization rate of the product are obviously improved; the prepared PTFE / ceramic composite membrane is narrow in pore diameter and uniform in pore diameter distribution, has good hydrophobicity and oil-water separation performance, can effectively intercept 30-200nm nanoparticles, and has excellent anti-pollution capacity and stable separation performance for water-in-oil emulsions with different concentrations.

The invention discloses a high-temperature-resistant ethylene-tetrafluoroethylene copolymer as well as a preparation method and application thereof. The copolymer comprises the following raw materials: 10-30 parts of ethylene; 60 to 80 parts of tetrafluoroethylene; and 6 to 30 parts of 4-(trifluoromethyl) styrene. The preparation method comprises the following steps: adding a perfluorocarbon solvent and 4-(trifluoromethyl) styrene into a reaction kettle, stirring, and keeping the temperature at 30-50 DEG C; and adding a mixed gas of ethylene and tetrafluoroethylene and a perfluorobutyryl peroxide compound in a molar ratio of 1: 1 into the system to initiate a polymerization reaction under the reaction pressure of 1-4MPa for 15-30 minutes. The application comprises the following steps: adding the prepared high-temperature-resistant ethylene-tetrafluoroethylene copolymer into an extruder; extruding at the temperature of 260-300 DEG C to coat the outer surface of the electric wire or the cable; and carrying out annealing treatment on the wire or the cable coated with the high-temperature-resistant ethylene-tetrafluoroethylene copolymer at the annealing temperature of 120-180 DEG C for 12-24 hours. The preparation method of the high-temperature-resistant ethylene-tetrafluoroethylene copolymer is simple, low in cost and convenient for large-scale production and application.

The invention discloses a polytetrafluoroethylene microporous membrane as well as a preparation method and application thereof, and belongs to the technical field of polytetrafluoroethylene microporous membranes. According to the invention, the polytetrafluoroethylene microporous membrane added with different amounts and different types of lubricants is prepared by a thermomechanical two-way stretching method, and the pore structure is researched. According to the invention, the entanglement density, the average pore size, the porosity, the hydrophobic property and the mechanical property can be regulated and controlled by changing the quantity and the type of the lubricant. And a new idea is provided for preparing the high-performance PTFE biaxially oriented film, and the method has a good application prospect.

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 membrane electrodes, and particularly relates to a hydrogen fuel cell catalyst layer slurry based on hydrophilic and hydrophobic regulation and a preparation method of a membrane electrode. The slurry of the catalyst layer comprises the following contents: the slurry of the PEM close to the cathode side comprises a Pt / C catalyst, deionized water, a perfluorosulfonic acid ionic polymer solution and isopropanol; the mass ratio, namely I / C ratio, of the ionic polymer to the carbon carrier is 0.8-1.2; the GDL cathode side slurry comprises a Pt / C catalyst, deionized water, a perfluorosulfonic acid ionic polymer solution, a PTFE aqueous solution (polytetrafluoroethylene aqueous solution) and isopropanol, and the mass ratio of the ionic polymer to the carbon carrier, namely I / C ratio, is 0.3-0.5. High hydrophilic ionomer content is reserved on the side, close to the cathode, of the PEM, proton conduction and catalyst active site wetting are guaranteed, the proportion of hydrophobic ionomers and hydrophobic materials is increased on the GDL side, a drainage channel is formed, liquid water is prevented from blocking gaps, then the performance of the membrane electrode is remarkably improved, and the interface contact resistance is stabilized to be 1.64-1.76 m omega (2.5 A / cm < 2 >).

The invention relates to the technical field of pipes, in particular to a modified polytetrafluoroethylene pipe and a preparation method thereof. The modified polytetrafluoroethylene pipe is prepared from modified carbon nanotubes, hydroxylated polytetrafluoroethylene powder and polytetrafluoroethylene powder through extrusion forming and sintering, the modified carbon nanotubes are obtained by modifying carbon nanotubes with gamma-(2, 3-epoxypropoxy) propyltrimethoxysilane and perfluorooctyltriethoxysilane, and the modified polytetrafluoroethylene pipe is prepared from the modified carbon nanotubes and the perfluorooctyltriethoxysilane. The modified polytetrafluoroethylene pipe provided by the invention has excellent mechanical properties, especially notch impact strength, so that the modified polytetrafluoroethylene pipe can be widely applied to dynamic load and high impact environments.

The invention relates to a finishing and dyeing method for a one-way moisture-conducting knitted fabric. The finishing and dyeing method comprises the following procedures of presetting, pretreatment, aftertreatment, first setting and second setting. Different from the prior art, the finishing method of the one-way moisture-conducting knitted fabric provided by the technical scheme adopts twice setting procedures; in the first setting procedure, the setting temperature is controlled to be 150-160 DEG C, so that tetrafluoroethylene on the surfaces of the load effect yarns forms fluff similar to lotus leaf needle shapes, and the bottom layer water resistance is achieved; in the second setting process, the absorption and discharge functions of the moisture-absorption and sweat-discharge yarns are enhanced by adding a moisture-absorption and quick-drying auxiliary agent, and meanwhile, the water resistance of the bottom layer is not influenced.

The invention relates to the technical field of organic chemical synthesis, and particularly discloses a method for producing hexafluorobutadiene, a continuous production system and application thereof. The method for producing hexafluorobutadiene comprises the following steps: (1) bromination reaction: reacting tetrafluoroethylene with liquid bromine to generate dibromotetrafluoroethane; (2) telomerization reaction: reacting the dibromo tetrafluoroethane with tetrafluoroethylene under the action of a catalyst to generate dibromo octafluorobutane; the catalyst is cuprous bromide; and (3) elimination reaction: reacting the dibromo octafluorobutane under the action of a Grignard reagent to generate hexafluorobutadiene. The method provided by the invention has the advantages of simple process, easily available raw materials, high production efficiency, continuous production, low production cost and industrial mass production value.

The invention relates to a hydrophobically modified aluminum oxide and polytetrafluoroethylene composite film as well as a preparation method and application thereof. According to the present invention, the aluminum oxide is firstly subjected to hydroxylation treatment, and then the surface of the aluminum oxide is subjected to hydrophobic treatment by using cyclosilazane, such that the Al-OH content of the prepared hydrophobic modified aluminum oxide surface is low, such that the water absorption rate of the aluminum oxide-PTFE composite film is low, and the aluminum oxide-PTFE composite film is not easily interfered by moisture, and has good electrical insulation performance. In addition, amino groups (-NH2) or imino groups (-NH-) are further introduced into the surface of the hydrophobic modified aluminum oxide and can form hydrogen-bond interaction with C-F bonds in PTFE, so that the compatibility of the hydrophobic modified aluminum oxide and the PTFE is improved, and the mechanical property of the aluminum oxide-PTFE composite film can still be kept under the condition of high addition amount of aluminum oxide.

The invention relates to the field of nylon materials, provides a high-performance, scratch-resistant, wear-resistant and corrosion-resistant nylon material replacing steel with plastic, and solves the problem that an existing nylon material is insufficient in scratch resistance, wear resistance and corrosion resistance. The material is prepared from a surface modified calcium fluoride and aluminum oxide whisker filler, polytetrafluoroethylene coated boron nitride particles, nylon matrix resin, a compatilizer, an antioxidant and a lubricant. The dispersibility and the interface compatibility of the key components are improved by adopting a special preparation process, so that the mechanical property, the wear resistance and the chemical stability of the composite material are remarkably enhanced. The material is suitable for metal replacement application in the fields of automobiles, machinery and the like, realizes excellent scratch resistance and wear resistance, solves the problem of poor corrosion resistance of nylon materials, and has wide application value.

The invention relates to the field of cables, and discloses a fire-resistant light cable for a safety harbor-returning system for a ship and a processing method thereof.The cable comprises a guide core, a fire-resistant layer, an insulating layer, a cabling layer, an inner sheath layer, an armor layer and an outer sheath layer which are sequentially arranged from inside to outside, and the inner sheath layer and the outer sheath layer are prepared by extruding sheath layer materials; the sheath layer is made of low-density polyethylene, nitrile rubber, ethylene-tetrafluoroethylene copolymer, functional additives, composite filler and auxiliaries; the functional additive is prepared by the following steps: reacting 3, 5-di-tert-butyl-4-hydroxybenzoyl chloride with 2-chloro-4, 6-diamino-1, 3, 5-triazine to obtain a modified hindered phenol component, and then reacting 1, 4-p-xylylene dichloride with 10-(2, 5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthrene-10-oxide to obtain a product, and continuously reacting the product with the modified hindered phenol component; the composite filler is prepared by modifying vermiculite with titanium dioxide and zinc oxide pillared. The cable prepared by the invention has excellent mechanical properties, flame retardance and aging resistance.

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.

The invention discloses perfluoroether rubber as well as a preparation method and application thereof. The perfluoroether rubber has an A1-B1-A2-B2 block structure, and the block A1, the block B1, the block A2 and the block B2 are respectively and independently obtained by polymerizing tetrafluoroethylene and perfluoroalkyl vinyl ether; the molar percentage content of the perfluoroalkyl vinyl ether in the block B1 or the block B2 is higher than the molar percentage content of the perfluoroalkyl vinyl ether in the block A1 and is also higher than the molar percentage content of the perfluoroalkyl vinyl ether in the block A2; the molar percentage content of the perfluoroalkyl vinyl ether in the block B2 is higher than the molar percentage content of the perfluoroalkyl vinyl ether in the block B1. The perfluoroether rubber provided by the invention has an A1-B1-A2-B2 four-block structure, realizes progressive transition of rigidity-flexibility-rigidity-super-flexibility, reduces compression set, prolongs the service life of a plasma environment, has high thermal decomposition temperature, and can be used for a long time at 300 DEG C or above.

The invention belongs to the technical field of composite pipes, and relates to a polytetrafluoroethylene and soluble polytetrafluoroethylene composite pipe as well as a processing method and application thereof. The preparation method comprises the following steps: firstly, carrying out ring opening polymerization on D3F and blocking by using an amino-containing silane coupling agent to prepare amino-terminated fluorosilicone oil, and taking the amino-terminated fluorosilicone oil as a lubricating agent for compounding and processing PTFE and PFA. The amino-terminated fluorosilicone oil contains a CF3 chain segment which has excellent compatibility with PTFE or PFA, and meanwhile, the cross-linking agent is added to form a chemical bond and a cross-linked structure with amino at the tail end of the lubricant, so that the wear resistance, tensile strength, permeability resistance and high-temperature creep resistance of the PTFE and PFA composite pipe can be improved, and the PTFE and PFA composite pipe can adapt to a long-term high-temperature working environment.

The invention discloses polytetrafluoroethylene composite resin and a preparation method thereof. The polytetrafluoroethylene composite resin comprises one or more modified fillers to enhance mechanical properties, increase dielectric constant and reduce dielectric loss. According to the preparation method of the polytetrafluoroethylene composite resin, the modified filler is added into the polytetrafluoroethylene which is uniformly mixed with the dispersion liquid, and the modified polytetrafluoroethylene composite resin is obtained through condensation treatment. The method is simple and easy to operate, and the influence of introduction of other solvents on the resin performance can be avoided while high-concentration dispersion can be realized.

The invention discloses a high-speed winding polyester-imine enameled wire and a manufacturing method thereof. The high-speed winding polyester-imine enameled wire comprises a conductor, a polyurethane-imine resin layer, a polyester-imine insulating layer and a self-lubricating functional layer which are sequentially arranged from inside to outside, and the self-lubricating functional layer is formed by compounding modified polyamide-imide resin and a solid lubricant. The modified graphene and the polytetrafluoroethylene are introduced and compounded with the modified polyamide-imide resin, so that the dynamic friction coefficient of the enameled wire can be reduced synergistically, the dynamic friction coefficient is less than or equal to 0.12, the polyamide-imide resin is modified, the graphene is modified, and the nano titanium dioxide is modified; according to the present invention, the compatibility and the interface bonding force between the modified polyamide-imide resin and the solid lubricant can be easily improved, the mechanical strength and the wear resistance of the coating can be improved, the friction heat can be effectively dispersed by using the high thermal conductivity of the graphene, and the direct friction contact area can be easily reduced by designing the micron-sized corrugated structure.

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.

The invention belongs to the field of pipe machining, and particularly relates to a polytetrafluoroethylene pipe production and machining grinding machine. The invention discloses a polytetrafluoroethylene pipe production and processing grinding machine capable of stabilizing a plurality of polytetrafluoroethylene pipes simultaneously. The polytetrafluoroethylene pipe production and processing grinding machine comprises a chassis and the like, a grinding piece is installed above the chassis, a rotating piece is installed in the chassis, and the upper portion of the grinding piece is connected with a fixing piece. By means of the chassis, pipes can be placed at the position without moving, and the equipment is more convenient to use; the rotating piece can drive the pipe to rotate and can drive the electric polishing wheel to intermittently move upwards or downwards at the same time, so that the pipe can be comprehensively polished; the cooling piece can cool the pipe, the pipe can be prevented from being damaged due to temperature rise, meanwhile, cooling liquid on the surface of the pipe returns into the rotating base through the discharging plate and the filter screen, and the cooling liquid can be recycled.