299 results about "Viton" patented technology

The invention relates to a composite cable, and relates to the technical field of cables, the composite cable comprises a conductor layer, a composite insulating layer, a waterproof layer, a weather-proof sheath layer and an armor layer from inside to outside in sequence, the conductor layer comprises at least six tinned copper conductors, the tinned copper conductors are symmetrically arranged in a regular hexagon shape, dielectric elastomers are filled among the conductors, and the dielectric elastomers are arranged between the tinned copper conductors. The composite insulating layer comprises an inner shielding layer, a main insulating layer and an outer shielding layer from inside to outside, the waterproof layer is a fluororubber extruded layer, the weather-proof sheath layer comprises a bonding transition layer and a weather-proof functional layer, and the armor layer is of a stainless steel band spiral wrapping structure. The composite cable can meet the requirement for high performance in a harsh environment and can show excellent performance under the extreme conditions of low voltage, large day and night temperature difference, strong ultraviolet rays, sand and dust abrasion, acid rain corrosion and the like.

The invention relates to a sealing structure of a flexible waterproof FFC wire harness and a forming process, and belongs to the technical field of automobile electronic wire harness manufacturing, the sealing structure comprises an FFC wire, a connector shell, a sealing ring and a blanking cap, the sealing ring is made of a fluororubber and hydrogenated butadiene-acrylonitrile rubber composite modified material, the connector shell is made of a glass fiber reinforced PP or PA66 material, and the blanking cap is made of a glass fiber reinforced PP or PA66 material. Under the cooperation of a vulcanizing agent system and an anti-aging agent system, double-material injection molding is adopted for integral forming, and double sealing is achieved through interference fit of the blanking cap and the sealing ring. The waterproof grade of the FFC wire harness reaches IP67, the weight is reduced, the size is reduced, the production efficiency is improved, and the FFC wire harness can be widely applied to wet area scenes such as automobile door lines, ceilings and seats, has the cost advantage and the environmental protection benefit, and has remarkable industrial application value.

The application relates to the field of chemical-proof fabrics, and particularly discloses a flame-retardant chemical-proof fabric and a preparation process thereof. The flame-retardant chemical-proof fabric comprises, from outside to inside, an outer layer, a bonding layer, a framework layer, a bonding layer and an inner layer which are sequentially contacted, the outer layer is a barrier layer, the inner layer is a barrier layer or an adsorption layer, the framework layer is selected from at least one of a composite fabric of aramid fiber / polyimide fiber, a basalt fiber cloth, a glass fiber cloth, a flame-retardant polyester cloth and a flame-retardant acrylic fiber cloth, the barrier layer is selected from at least one of a PVC / TPU composite film, a PVC film, a PTFE film, a PE film, silicone rubber, fluororubber, butyl rubber, chloroprene rubber and natural rubber, and the adsorption layer comprises a mixed fabric layer formed by nylon fiber and polyester fiber containing an adsorption material. The flame-retardant protective fabric has the advantages of high flame-retardant capacity, good chemical-proof effect, excellent puncture resistance and tensile resistance, can absorb moisture and sweat, and is comfortable to wear.

The utility model relates to the technical field of rubber sealing ring performance detection devices, in particular to a material toughness detection device for preparing a fluororubber sealing ring, which comprises a device body, a first support and a second support are sequentially fixed on the device body from top to bottom, a cylinder is fixed on the first support, and a piston rod is mounted at the output end of the cylinder. A pressing plate is fixed to the bottom end of the piston rod, an outer fixing ring is fixed to the second support, a rotating disc is rotationally arranged in the outer fixing ring, a plurality of arc-shaped grooves are formed in the rotating disc, a plurality of first I-shaped clamping grooves are formed in the outer fixing ring, movable rods penetrating through the arc-shaped grooves are slidably clamped in the first I-shaped clamping grooves, and first clamping plates are fixed to the movable rods; according to the multi-directional tensile strength detection device for the fluororubber sealing ring, the multi-directional tensile strength detection test of the fluororubber sealing ring can be realized at one time, and the working efficiency of the tensile strength detection of the fluororubber sealing ring is greatly improved.

The application relates to the technical field of rubber sealing materials, and discloses a high and low temperature resistant fluororubber sealing element and a preparation method thereof. The high and low temperature resistant fluororubber sealing element is prepared from fluororubber raw rubber, reinforcing fillers, inorganic fillers, acid absorbents, processing aids and vulcanizing agents, wherein the acid absorbents are prepared from metal hydroxides and metal oxides in a mass ratio of (2-5):(1-3), and the processing aids are prepared from amide flow aids, polyethylene wax and fatty acid metal salts in a mass ratio of (1-2.5):(0.8-2):(0.5-1). The prepared high and low temperature resistant fluororubber sealing element has excellent mechanical properties, high temperature resistance, low temperature resistance and compression permanent deformation performance, and effectively solves the technical problems of easy aging of existing fluororubber sealing elements at high temperatures, large compression permanent deformation and easy brittle cracking at low temperatures. The preparation method adopts a mixing and vulcanization process, the preparation method is simple, and the method is suitable for large-scale production.

The utility model discloses a kind of flexible inner container pressure-bearing hot water storage tank, belong to the technical field of hot water storage equipment, including water storage tank main body, water inlet pipe is installed on water storage tank main body upper end, water outlet pipe is installed on water storage tank main body lower end, flexible inner container is fixedly connected in water storage tank main body, multiple evenly distributed pressure-bearing rings are arranged between flexible inner container and water storage tank main body inner wall, pressure-bearing ring includes the connecting ring being connected with water storage tank main body inner wall, multiple evenly distributed elastic contact rods are embedded and arranged in connecting ring, flexible connecting rod is connected between each elastic contact rod and flexible inner container, the flexible inner container is made of fluorine rubber, silicon rubber or temperature-resistant polyurethane material, elastic contact rod is made of elastic metal material, and rubber layer is covered on the surface of elastic contact rod, can be realized through setting pressure-bearing ring, can promote its inner flexible inner container when storing water has stronger buffering effect, improve the pressure-bearing performance of flexible inner container.

The invention discloses an antistatic teflon sleeve and a preparation method thereof. The antistatic teflon sleeve is prepared from the following components in parts by weight: 80-95 parts of teflon resin, 5-20 parts of a core-shell structure conductive filler, 1-3 parts of a compatilizer, 0.5-2 parts of a flexibilizer and 0.1-0.5 part of an antioxidant. The outer protective layer is prepared from the following components in parts by weight: 70 to 85 parts of ethylene-tetrafluoroethylene copolymer, 5 to 15 parts of modified nano silicon dioxide, 5 to 10 parts of fluororubber, 1 to 3 parts of antistatic aid and 0.1 to 0.5 part of ultraviolet absorbent. Through the design of the core-shell structure conductive filler, the core layer nano copper powder provides high conductivity, the shell layer PVDF has good compatibility with the Teflon base material, the surface modification layer further enhances the interface bonding force, the volume resistivity of the inner layer base material is reduced, and the antistatic requirement is met; the conductive filler is uniformly dispersed in the base material instead of a surface coating, so that the antistatic performance failure caused by friction or bending is avoided, and the antistatic performance is lasting and stable.

The utility model discloses an anti-corrosion garbage pipeline baffle device, and relates to the technical field of garbage pipelines. Comprising a mounting pipe frame, a sliding groove is formed in the inner wall of the mounting pipe frame, and a blocking assembly is arranged on the inner wall of the sliding groove. At the moment, the multiple compression springs extend to push the two ethylene propylene rubber plates to move, so that the protruding end of the right ethylene propylene rubber plate abuts against the inner wall of a sealing groove formed in the side wall of the left ethylene propylene rubber plate, and therefore the inner wall of the mounting pipe frame is blocked; secondly, when the two ethylene propylene rubber plates abut against each other, the fluororubber disc is pulled through an oil rope, so that the surface of the fluororubber disc tightly abuts against a conical arc edge formed in the top face of the mounting pipe frame, and the probability that the fluororubber disc is corroded by acid-base components in the garbage pipeline through the two ethylene propylene rubber plates is reduced; and therefore, harmful gas in the garbage pipeline is prevented from polluting air through the fluororubber disc.

A hot press cushioning material includes fluororubber. A composition of the fluororubber includes a fluororubber component, a vulcanizing agent, an acid acceptor, and a dehydrating agent.

The invention discloses a temperature-resistant heat-insulation sealing metal-rubber composite material which comprises a metal phase, a rubber phase and a binder, the preparation method of the temperature-resistant heat-insulation sealing metal rubber composite material comprises the following steps: step 1, sintering and molding metal fibers to obtain a three-dimensional porous metal framework; 2, fluororubber and silicone rubber are added into an internal mixer to be blended, then hollow glass beads and carbon black are sequentially added, the mixture is mixed to be uniform, and rubber mixed rubber is prepared; 3, the surface of the metal framework is coated with a binding agent, the binding agent is covered with the rubber compound, and the whole material is placed in a vulcanizing machine to be vulcanized; and 4, integrally transferring the vulcanized material into a drying oven for secondary vulcanization, and cooling to obtain a composite material finished product. The composite material is applied to the field of space flight and aviation. The invention aims to solve the problems of narrow temperature resistance range, non-ideal heat insulation effect and obvious reduction of high-temperature mechanical properties of the existing material, so as to meet the use requirements of aerospace equipment in a complex thermal coupling environment.

The invention relates to a corrosion-resistant marine cable and a preparation method thereof.The corrosion-resistant marine cable comprises a wire core composed of a conductor and an insulating layer wrapping the conductor, and further comprises a gradient composite corrosion-resistant sheath wrapping the wire core, and the gradient composite corrosion-resistant sheath is of a three-layer co-extrusion integrated structure and comprises a bottom layer combined with the insulating layer, the bottom layer comprises the following components in parts by weight: 80-90 parts of thermoplastic polyurethane and 10-20 parts of a corrosion inhibitor; the middle layer is coated outside the bottom layer and comprises the following components in parts by weight: 90-99 parts of chlorinated polyethylene and 1-10 parts of graphene modified epoxy resin; and the surface layer is coated outside the middle layer and comprises the following components in parts by weight: 95-99 parts of fluororubber and 1-5 parts of carbon nanotubes. When the corrosion-resistant marine cable is applied to a complex corrosion environment with high salt mist and much oil dirt in the ocean, the corrosion-resistant marine cable has good comprehensive protection capability, and the service life of the cable is remarkably prolonged.

The application relates to the technical field of molecular distillation equipment, and discloses a vacuum pressure system of a multi-stage molecular distillation equipment, which comprises an outer pipe connecting end, an inner pipe connecting end, a distiller and a monitoring mechanism; the monitoring mechanism is arranged in the interlayer of the outer pipe connecting end and the inner pipe connecting end, is used for monitoring the sealing condition of the outer side of the gap of the inner pipe connecting end, and seals the leakage point after the leakage point appears, and informs the personnel to repair. The vacuum pressure system of the multi-stage molecular distillation equipment is characterized in that the monitoring mechanism is arranged in the interlayer of the outer pipe connecting end and the inner pipe connecting end, the attaching sheet of a plurality of sealing components is annularly wrapped around the inner pipe connecting end, and the protection shell is filled with gas-expanding fluorine rubber particles; when the leakage point appears, the attaching sheet is firstly moved to the leakage point to preliminarily seal the leakage point, and then the filler is expanded to further press the attaching sheet to tightly adhere to the leakage point, so that the problem that the connecting end is prone to generating the leakage point and the product quality is reduced in the prior art is solved.

The utility model discloses a floor board with a good stain-resistant effect, which comprises a board body, a wear-resistant layer is arranged on the outer surface of the board body, the wear-resistant layer comprises a polyurethane coating and a fluorocarbon rubber coating, a stain-resistant layer is arranged on the outer surface of the wear-resistant layer, the stain-resistant layer comprises a polypropylene coating and an epoxy resin coating, the board body comprises a substrate layer, and the substrate layer comprises a polyurethane coating and a fluorocarbon rubber coating. A clamping groove part is arranged on the left side of the base layer, a protruding part is arranged on the right side of the base layer, the polyurethane coating is arranged on the outer surface of the plate body in a coating mode, the fluorocarbon rubber coating is arranged on the outer surface of the polyurethane coating in a coating mode, the polypropylene coating is arranged on the outer surface of the fluorocarbon rubber coating in a coating mode, and the epoxy resin coating is arranged on the outer surface of the polypropylene coating in a coating mode. According to the utility model, the stain-resistant layer is arranged, the epoxy resin coating contained in the stain-resistant layer can carry out first-layer stain-resistant protection treatment on the plate body, and the polypropylene coating can carry out second-layer stain-resistant protection treatment on the plate body after the epoxy resin coating is damaged, so that the stain resistance of the whole plate body is effectively improved.

The utility model relates to a high-temperature-resistant elastic fluorine band, which belongs to the technical field of fluorine bands and comprises a fluorine band body wound into a reel shape, the fluorine band body comprises a stainless steel band and full-fluorine rubber pads, the full-fluorine rubber pads are arranged on the inner side and the outer side of the stainless steel band, and fixed support plates are arranged on the full-fluorine rubber pads. Two sets of side plates are sequentially fixed to the front face of the fixed supporting plate in the vertical direction, first limiting assemblies for positioning the fluorine belt body are arranged on the side plates, and each first limiting assembly comprises auxiliary winding drums rotationally arranged on the sides, close to each other, of the side plates; the fixing support plate is provided with a second limiting assembly used in cooperation with the first limiting assembly, and due to the design of the first limiting assembly and the second limiting assembly, various and multi-directional binding structures are adopted, so that the binding firmness of the fluorine band body is greatly improved; the binding structure can be effectively prevented from being broken easily in the winding and transferring process of the fluorine belt body.

The invention relates to the technical field of wire and cable manufacturing, in particular to an anti-corrosion cable and a preparation method thereof, and the anti-corrosion cable comprises a conductor, an anti-corrosion isolating layer, an insulating layer, an armor layer and an outer sheath from inside to outside. The surface of the conductor is plated with an aminated graphene-nickel-phosphorus composite plating layer; the anti-corrosion isolating layer contains 30-40 parts of fluorine rubber, 10-15 parts of nano boron nitride-silicon dioxide core-shell particles and the like; the insulating layer contains 45-55 parts of crosslinked polyethylene, 8-12 parts of montmorillonite-carbon nanotube-graphene composite powder and the like; the armor layer is formed by compounding a basalt fiber-glass fiber composite filament woven mesh and a polyether-ether-ketone-polyimide composite film; and the outer sheath contains 25-35 parts of chlorinated polyethylene, 5-8 parts of nano titanium dioxide-cerium oxide composite powder and the like. The corrosion-resistant cable has the advantages of corrosion resistance, strong weather resistance, excellent electrical and mechanical properties, long service life and low maintenance cost, can stably operate for a long time in severe environments such as high salinity and high humidity, and is suitable for multi-corrosion scenes.

The utility model relates to a head nut technical field, especially a four fluorine outer clothing head nut for fixing fluorine plastic board, including nut body, still including sealing along and installation component, nut body lower extreme fixedly connected with sealing along, nut body outer surface is equipped with a layer of polytetrafluoroethylene outer clothing, and nut body upper end is provided with installation component, the utility model discloses through sandblasting treatment surface, and polytetrafluoroethylene powder is evenly sprayed on the nut body surface, and the dense outer clothing layer is formed through high -temperature sintering, through the high chemical stability and high temperature resistance of polytetrafluoroethylene outer clothing, make the nut service life extension, through filling high -temperature sealant and three millimeter thick soft four fluorine round pad or three millimeter thick high -temperature fluorine rubber pad in the sealing groove, further promote the sealing performance, solved because PTFE board itself welding fusibility just has no PFA effect good, and the welding firm degree is lower, and fluorine plastic cap is easy to crack under the flue harsh environment, causes the corrosion of bolt, leads to the problem of poor sealing.

The utility model discloses a fluororubber premix reaction device which comprises a bottom plate, a hydraulic rod is arranged on one side of the surface of the bottom plate, and a transverse plate is arranged at the top of the hydraulic rod; the end, located above the transverse plate, of the main shaft is sleeved with a driving gear, the end, located above the transverse plate, of the auxiliary shaft is sleeved with a driven gear, the driven gear is meshed with the driving gear, and a servo motor for driving the driving gear to rotate is arranged on the upper surface of the transverse plate. Stirring rods are uniformly arranged at the bottom of the main shaft in the circumferential direction, a diffusion disc is arranged at the bottom of the auxiliary shaft, and the diffusion disc is located above the stirring rods; according to the utility model, the pre-mixed fluororubber raw materials are stirred by the stirring rod at the lower part, and the pre-mixed fluororubber is stirred and diffused by the diffusion disc at the upper part, so that the pre-mixed fluororubber raw materials are uniformly mixed by the stirring rod at the lower part, the raw materials are uniformly mixed, and the mixing quality of the pre-mixed fluororubber is improved.

The present disclosure provides a conductive diaphragm and a speaker using same. The conductive diaphragm includes a main portion made of polymer material and a conductive portion located on the main portion. The conductive portion includes a substrate with a film layer and conductive material dispersed in the substrate, the film layer is solidified from at least one material of thermoplastic elastomer, phenyl silicone, isoprene rubber, or fluoroelastomer. Compared with the related technologies, the conductive diaphragm disclosed by the present disclosure has excellent atigue-resistant property and could maintain good adhesive strength and toughness.

The invention discloses a worm and gear speed reducer with high sealing performance, which relates to the technical field of speed reducers and comprises an upper box body, a lower box body, a worm gear assembly, a worm assembly, an input shaft, an output shaft, a sealing system, a cooling assembly and a pressure balance valve. The sealing system is fused with bionic design, a fluororubber bionic fold oil seal is arranged at a shaft extension part, and a stepped sealing groove and a polysulfide sealant are arranged on a box body junction surface and are matched with an oil blocking boss to form multi-stage protection; the cooling assembly is driven by a worm wheel cam, and active circulation cooling of lubricating oil is achieved through a piston and a tubular radiator. A waterproof breathable film is embedded in the pressure balance valve to balance air pressure inside and outside the box body and block impurities. According to the invention, the cooperation of bionic sealing leakage prevention, active cooling temperature control and pressure balance is realized, the sealing reliability and the heat dissipation efficiency are obviously improved, the aging of a sealing element and the deterioration of lubricating oil are effectively delayed, the service life of the whole machine is prolonged, and the device is suitable for scenes with strict requirements on sealing and transmission precision, such as automatic production lines and engineering machinery.

The pipeline support for building construction comprises a ring body, the inner side of the ring body is fixedly connected with a plurality of fluorocarbon rubber rods and springs which are distributed at equal angles, the tail ends of the fluorocarbon rubber rods and the tail ends of the springs are fixedly connected with clamping rods, the left side and the right side of the ring body are fixedly connected with first connecting blocks, and the left side and the right side of the ring body are fixedly connected with second connecting blocks. The inner surface of the first connecting block is connected with a second connecting block through a bolt, and the outer side of the second connecting block is connected with an adjusting rod through a bolt. A pipeline is inserted from the clamping rod, the external bolt penetrates out of the first mounting hole to fix the pipeline on the inner side of the clamping rod, the pipeline can be flexibly supported under the cooperation of the fluorocarbon rubber rod and the spring, and people can penetrate out of the second mounting hole to fix the mounting plate on the surface of an object through the external bolt. And the position of the ring body can be adjusted under the cooperation of a third connecting block, a sleeve, an adjusting rod, a second connecting block and a first connecting block, so that the overall flexibility of the device is effectively improved.

The invention belongs to the technical field of polymer composite materials, and particularly relates to a high-toughness rubber composition, a preparation method and application of the high-toughness rubber composition to a semiconductor sealing ring. The preparation method comprises the following steps: carrying out end-capping modification on carboxyl-terminated liquid fluororubber by using gamma-(2, 3-epoxypropoxy) propyltrimethoxysilane to obtain a modified liquid fluororubber solution; modifying aramid fibers by using the modified liquid fluorine rubber solution to obtain modified aramid fibers; meanwhile, gamma-(2, 3-epoxypropoxy) propyl trimethoxy silane is used for carrying out epoxy functional modification on the fumed silica; and compounding the modified aramid fiber, the epoxy modified fumed silica, the carboxyl-terminated liquid fluororubber, an acid acceptor, a processing aid, a vulcanizing agent and a crosslinking aid to prepare the high-toughness fluororubber composition. According to the composition, the toughness, the tear resistance and the processing stability are remarkably improved while excellent heat resistance and chemical resistance of fluororubber are maintained, and the composition can be applied to preparation of semiconductor sealing rings.

The invention relates to the technical field of sheathed cables, and particularly discloses a high-temperature-resistant fluororubber sheathed cable capable of being vulcanized and bonded and a preparation method of the high-temperature-resistant fluororubber sheathed cable. Fluorosilicon resin and vinyl silane are adopted for modifying a flexible microporous polytetrafluoroethylene film, vinyl silane is adopted for modifying ethylene propylene rubber, and the interlayer bonding performance of the cable is improved; then tetrafluoroethylene-propylene rubber and modified silicone rubber are introduced into 246 type fluororubber, so that the high-temperature mechanical property, modulus and creep resistance of a cable sheath layer are improved, and the cable which is good in interlayer bonding property and still has good performance in a high-temperature and high-pressure extreme environment is formed.

The present application relates to the technical field of perfluorinated rubber composition, and particularly relates to a perfluorinated rubber composition, a preparation method thereof and an article. The perfluorinated rubber composition is prepared from the following raw materials in parts by weight: 100 parts of cyan perfluorinated rubber raw rubber, 0.7-8.6 parts of vulcanizing agent, and 0-20 parts of reinforcing filler; the vulcanizing agent comprises nano silicon nitride and nitrogen-containing organic amine compound; the nano silicon nitride is non-beta crystalline nano silicon nitride. The present application can improve the yield of perfluorinated rubber composition articles, and improve the high-temperature compression of the perfluorinated rubber composition articles. The present application can improve the tensile strength of perfluorinated rubber composition articles, and reduce the permanent compression deformation rate and resilience of perfluorinated rubber composition articles at 204 DEG C.

This invention relates to the field of rubber materials technology, and proposes a wear-resistant and anti-aging rubber granule for sports fields, comprising the following raw materials in parts by weight: 90-110 parts hydrogenated nitrile rubber, 30-40 parts wear-resistant composite filler, 20-30 parts fluororubber, 8-12 parts plasticizer, 1-3 parts antioxidant, 0.5-1 part vulcanizing agent, and 1-2 parts vulcanization accelerator; the wear-resistant composite filler comprises the following raw materials in parts by weight: 100 parts carbon black, 20-30 parts sodium silicate, and 5-15 parts sodium aluminate. This technical solution solves the problem of insufficient aging resistance and wear resistance of rubber granules in related technologies.

The application discloses a kind of low-temperature fluorine rubber materials resistant to pure carbon dioxide and anti-blast and a preparation method thereof.The material is made of the following raw materials: low-temperature fluorine rubber raw rubber 100 parts, vulcanizing agent 2-4 parts, auxiliary crosslinking agent 3-8 parts, release agent 1-2 parts, composite anti-gas blast reinforcing agent 2-5 parts, reinforcing agent 3-5 parts, reinforcing filler 30-40 parts.The application builds a multi-scale barrier network in the rubber matrix through the synergistic effect of graphene oxide, nano zinc oxide and single-walled carbon nanotubes, significantly improving the CO2 resistance and anti-blast performance.After testing, the volume change rate of the material in a pure CO2 environment at 150°C and 38MPa is only 8.2%, there is no blister, the tensile strength reaches 21.5MPa, and the comprehensive performance is excellent, suitable for sealing components under extreme working conditions such as CCUS projects.

The application relates to the technical field of rubber materials, and discloses fluorine rubber for high-temperature oxygen sensors and a processing technology thereof. The processing technology comprises the following steps: S1: fluorinated modified methyl vinyl silicone rubber is prepared from methyl vinyl silicone rubber and 1H, 1H, 2H, 2H-perfluorodecanethiol; S2: glycerol modified silicone rubber is prepared from methyl vinyl silicone rubber and 1-thioglycerol; the glycerol modified silicone rubber is taken, mixed uniformly in a mixed solvent of tetrahydrofuran and water, urea is added, phosphoric acid is added dropwise under heating, and the mixture is kept for reaction, the solvent is removed, and the mixture is dried to obtain phosphoric acid ester modified methyl vinyl silicone rubber; S3: the fluorine rubber after being broken, the fluorinated modified methyl vinyl silicone rubber and the phosphoric acid ester modified methyl vinyl silicone rubber are added into an open mill and mixed uniformly, a composite filler and magnesium oxide are added, mixing is carried out, a vulcanizing agent and a crosslinking aid are added, mixing is carried out uniformly, and vulcanization is carried out to obtain the fluorine rubber for high-temperature oxygen sensors.

The invention relates to the field of coating preparation, in particular to a polytetrafluoroethylene coating of a spunlace non-woven fabric fan and a preparation method of the polytetrafluoroethylene coating, and the polytetrafluoroethylene coating comprises the following components in parts by weight: 70-90 parts of polytetrafluoroethylene, 10-30 parts of epoxy-terminated liquid fluororubber, 5-20 parts of filler, 0.5-3 parts of silane coupling agent and 1-5 parts of vulcanizing agent. The polytetrafluoroethylene and the epoxy-terminated liquid fluororubber are compounded, so that the coating can have high and low temperature resistance of the polytetrafluoroethylene, and can absorb stress through a flexible molecular chain of the epoxy-terminated liquid fluororubber, so that the toughness of the coating is improved, the addition of the epoxy-terminated liquid fluororubber also provides a reaction anchor point for other raw materials, and the service life of the coating is prolonged. Therefore, the adhesiveness and the overall performance of the coating are enhanced, and the polytetrafluoroethylene coating of the spunlace non-woven fabric fan with excellent performance is prepared.

The invention provides a cable with good wear resistance and a connecting assembly thereof, and relates to the technical field of cables, the cable with good wear resistance comprises a cable main body and an outer sheath, the cable main body is arranged at the inner side of the outer sheath, and the outer side of the outer sheath is coated with a wear-resistant layer; the cable body comprises a lining layer, three copper conductive cores are arranged on the inner side of the lining layer, the outer sides of the copper conductive cores are fixedly sleeved with an inner sheath, a gap between the inner side of the lining layer and the inner sheath is filled with a filling layer, the outer side of the lining layer is fixedly sleeved with a honeycomb sleeve, and a plurality of honeycomb holes are evenly formed in the peripheral wall of the honeycomb sleeve in a penetrating mode. The wear-resistant layer wrapping the outer side of the outer sheath of the cable is made of a nano ceramic particle enhanced fluororubber material which has excellent scratch resistance and wear resistance and can effectively resist friction between the cable and the ground, a pipeline and a wall in the laying process and external mechanical scratch in long-term use; and the risk of exposure of the internal cable main body caused by damage of the outer sheath is reduced.

The utility model discloses an air conditioner drain pipe anti -back flow structure, including first pipeline and second pipeline, and the device pipe is connected between first pipeline and second pipeline, the upper and lower both ends of device pipe are all the conical setting, and the middle part pipe well is greater than two end pipe diameter, and the inside storage of device pipe has the float ball, and the surface of float ball is provided with the composite fluorine rubber sealing layer, and the diameter of float ball is greater than the inside diameter of first pipeline, second pipeline, and the lower extreme of device pipe is provided with the bowl -shaped support, is provided with a plurality of through -going holes on the bowl -shaped support, through to the material innovation of float ball, guide rod, device pipe and filter screen's setting, systematic solution oil dirt card stagnation, buoyancy attenuation etc. Core problem, reduce the whole life cycle maintenance cost simultaneously.

This seal member is formed from a rubber composition obtained by crosslinking a non-crosslinked rubber composition. The non-crosslinked rubber composition contains FKM, a peroxide, an acidic or neutral reinforcing filler, and a basic filler.