26results about "Rubber insulators" patented technology

The application provides a kind of flame-retardant anti-interference cable material and its preparation method and application, belong to cable material technical field.The flame-retardant anti-interference cable material provided by the application includes: rubber 100 parts, nano-silicon dioxide 2-5 parts, activator 1-6 parts, plasticizer 2-4 parts, vulcanizing agent 2-8 parts, vulcanization accelerator 0.1-1 part, antioxidant 1-3 parts and flame retardant 20-40 parts;The flame retardant is silane coupling agent modified composite powder;The composite powder includes magnesium hydroxide, hydrotalcite, molybdenum trioxide and potassium titanate whisker.The application controls the composition of the composite powder, hydrotalcite is first decomposed when burning, then magnesium hydroxide is decomposed, absorbs heat while releasing water vapor, molybdenum trioxide can catalyze carbon layer graphitization and has smoke suppression effect, add potassium titanate whisker, which has excellent thermal stability, plays the role of fibrous skeleton, the four have synergistic effect, further improve the flame-retardant performance of cable material.

In the high-voltage cable polypropylene insulating material provided in the present application, the polypropylene in-reactor alloy resin serves as a backbone of the composite material, and can provide the high-voltage cable polypropylene insulating material with excellent thermal endurance. In addition, the thermoplastic polyolefin elastomer can induce interfacial shear bands or crazes, allowing the energy from an external force to be dissipated through the interfacial shear bands or crazes, thereby enabling the high-voltage cable polypropylene insulating material to maintain excellent mechanical strength even at high temperatures. Furthermore, in the present application, the polypropylene in-reactor alloy resin and the thermoplastic polyolefin elastomer demonstrate good compatibility therebetween, which enables the high-voltage cable polypropylene insulating material to have a relatively low flexural modulus and a relatively high breakdown field strength, resulting in excellent toughness and electrical performance, thereby meeting the application requirements for high-voltage cable polypropylene insulating materials.

The application relates to the field of cable materials, in particular to an ethylene-propylene rubber insulating material for charging pile cables and a preparation method thereof. The ethylene-propylene rubber insulating material for charging pile cables has a functional gradient structure and comprises: an inner insulating area which is composed of grafted modified ethylene-propylene rubber, a reversible crosslinking agent and an antioxidant; a transition fusion area which contains surface-modified heat-conducting fillers; and an outer functional area which contains heat-conducting fillers and flame retardants; the insulating material as a whole forms a continuous network through thermal reversible crosslinking, can be uncrosslinked at 130-150 DEG C and can be recrosslinked at 150-170 DEG C. With the functional gradient structure, the precise partitioning and cooperation of the insulation, heat conduction and flame retardation performance are realized, and the traditional irreversible limitation is broken through, so that the core needs of the insulating reliability, heat dissipation efficiency and flame retardation safety during the operation of the charging pile are solved, and the advantages of repairability, recyclability and flexible processing are possessed.

A method for preparing and applying a silicone rubber / crosslinked polyethylene composite dielectric for cable accessories is disclosed, belonging to the field of composite dielectric preparation methods and applications. The purpose of this invention is to solve the problem in existing technologies where, with long-term cable operation, silicone grease diffuses into the silicone rubber, causing swelling, leading to a decrease in the insulation performance of the silicone rubber and an increase in the failure rate. The method includes: 1. Preparing silicone rubber; 2. Preparing crosslinked polyethylene; 3. Preparing a doped and modified silicone grease; 4. Coating the modified silicone grease onto the surface of the silicone rubber, and then covering it with crosslinked polyethylene. 2,3,5,6-Tetrafluoro-7,7',8,8'-Tetracyanodimethyl-p-benzoquinone is introduced into the silicone grease as a filler to construct carrier traps, hindering carrier injection and transport. Under the synergistic effect of this filler and silicone grease, intermolecular forces are enhanced, silicone grease slippage is reduced, and thus the electrical insulation properties of the silicone rubber-crosslinked polyethylene composite interface are further increased.

The application relates to a bionic self-healing compression-resistant cable sheath material suitable for a deep-sea floating wind power platform and a manufacturing method thereof, and belongs to the field of special cable materials for deep-sea energy equipment. A technical scheme: a bionic base component is composed of hydrogenated nitrile rubber, polyether type thermoplastic polyurethane and ethylene-octene copolymer and is 100 parts; a dynamic reversible crosslinking system is composed of a compound containing a borate ester bond and a peroxide vulcanizing agent and is 10-20 parts; a deep-sea environment functional filler is 20-40 parts, and the deep-sea environment functional filler has a multi-level core-shell structure; an anti-fouling slow-release system is 5-12 parts; and a processing aid is 10-25 parts. Through the synergistic effect of the bionics principle, dynamic covalent chemistry and multi-scale functional fillers, the comprehensive performance of the material in the deep-sea extreme environment is broken through, the deep-sea environment adaptability and long-term service performance are excellent, and the technical problems of the existing deep-sea cable sheath material in the aspects of compression resistance, self-healing ability, anti-biofouling and low-temperature adaptability and the like are solved.

This invention relates to the field of polymer materials technology, and discloses a high-elasticity rubber-plastic insulated cable composite material and its preparation method. The high-elasticity rubber-plastic insulation material comprises, by weight, 40-50 parts of EPDM rubber, 20-25 parts of polyolefin elastomer, 30-35 parts of modified calcined kaolin, 3-5 parts of composite antioxidant, 2-3 parts of silane coupling agent, and 1.5-2 parts of vulcanizing agent. During preparation, EPDM rubber and polyolefin elastomer are kneaded for 5-8 minutes, then modified calcined kaolin and silane coupling agent are added and kneaded for another 8-12 minutes, followed by the addition of composite antioxidant and vulcanizing agent and kneading for 3-5 minutes. Finally, the mixture is vulcanized in stages. The first stage vulcanization temperature is 155-160℃, and the second stage vulcanization temperature is 165-170℃. The insulating material prepared by this invention has excellent elasticity, outstanding resistance to flexural fatigue, stable insulation performance, high volume resistivity, excellent aging resistance, and tight interfacial bonding. It is suitable for use in high-voltage cable insulation layers, effectively extending the service life and stability of the cable.

This invention relates to the field of power cable technology and discloses an electromagnetic interference-resistant and radiation-resistant power cable and its preparation method. The cable includes a conductor core and an insulating shielding layer; the insulating shielding layer is made of EPDM rubber, cerium-modified epoxy / carbon nanotube conductive paste, zinc oxide, stearic acid, dicumyl peroxide, and triallyl isocyanurate. The conductive paste is prepared by liquid-phase dispersion and in-situ chemical grafting reaction of multi-walled carbon nanotubes, tannic acid, cerium salt, and epoxidized soybean oil. This invention constructs a cerium-containing organic coating layer on the surface of carbon nanotubes through the coordination effect of tannic acid and cerium ions and the in-situ grafting of epoxidized soybean oil, improving the dispersibility and interfacial bonding of the filler in the rubber matrix. This structure not only reduces the conductivity percolation threshold and improves the electromagnetic shielding effectiveness, but also utilizes the free radical scavenging ability of the cerium-tannic acid complex to block radiation aging, significantly improving the radiation resistance and service life of the cable.

The objective of this invention is to provide a composition for an insulating layer of a printed wiring board that has a low dielectric constant, a low dielectric loss tangent, and flame retardancy. The resin composition for the insulating layer of a printed wiring board contains polybutadiene, wherein the molar ratio of 1,2-bonded structures to 1,4-bonded structures in the polybutadiene is 60:40 to 100:0, and one or more carbon atoms of the polybutadiene are bonded with formula (III) (in formula (III), represents the bonding position, X...). 1 and X 2 Each can independently represent a single bond or an oxygen atom, R 1 and R 2 Each can be used independently to represent an organic group. (The ) represents a phosphorus-containing group.

This invention relates to a rubber composition for high-voltage electrical insulators, comprising: (A) a rubber material selected from the group consisting of nitrile rubber, hydrogenated nitrile rubber, acrylic rubber, ethylene propylene diene monomer (EPDM) rubber, and butyl rubber; and (B) a filler selected from the group consisting of carbon black and silica. The filler (B) comprises at least one type of silica, with a silica content of 4.0% by mass or more relative to the total mass of the rubber composition, and a carbon black content of 5.0% by mass or less relative to the total mass of the rubber composition.

A rubber composition having improved electrical insulation properties for reducing galvanic corrosion, a method of preparing the composition, and a rubber hose for vehicles using the composition are disclosed. The rubber composition includes a base polymer, a reinforcing agent, an anti-aging agent, an activating agent, a plasticizer, anda crosslinking agent, and has electrical insulation resistance (107 Ω·cm) of 50 or more.

The invention starts with a rolling bearing ring unit (10) having at least one bearing ring (12) and at least one electrically insulating element (16) fixed to the bearing ring (12), the bearing ring being an outer ring and comprising at least one raceway (14). It is proposed that there is a first imaginary half-plane (18) and a second imaginary half-plane (22), the first imaginary half-plane being delimited by a central axis (20) of the bearing ring (12), the second imaginary half-plane also being delimited by the central axis (20) and being different from the first half-plane (18), such that a portion (24) of the insulating element (16) located between the half-planes (18, 22) is at a distance (23) from the central axis (20) that is greater than half the maximum diameter (26) of the raceway (14).

The application provides a pH-responsive high-temperature-resistant hybrid intelligent drug release microcapsule, a preparation method thereof and application thereof in power insulation materials, and relates to the field of power insulation materials.The preparation method of the microcapsule comprises the following steps: weighing chitosan, adding the chitosan into an acetic acid aqueous solution, stirring, and obtaining a chitosan acidic solution; dropping an isothiazolinone bacteriostatic agent solution into the chitosan acidic solution, high-speed shearing, ultrasonic dispersion, and obtaining a nano / sub-micron emulsion; dropping tetraethyl orthosilicate into the emulsion, stirring, adjusting a pH value, and forming a hybrid gel shell; dispersing the hybrid gel shell in anhydrous ethanol; adding a silane coupling agent; further adding a zinc salt solution, stirring, and obtaining a microcapsule slurry; and adding the microcapsule slurry into a growth solution, and reacting to obtain the target microcapsule.The microcapsule has a core-shell-skin three-layer structure, is used in power outdoor insulation materials, and can realize the functions of intelligent response, long-acting inhibition of the adhesion and growth of algae, mold and microorganisms.

The application relates to a heat-conducting intelligent insulation material with nonlinear volt-ampere characteristics, a preparation method and application thereof, and belongs to the technical field of insulation materials. The intelligent insulation material comprises a polymer matrix and SiC nanofiber felt in the polymer matrix, the volume fraction of the SiC nanofiber felt is 0.5%-2% of the polymer matrix, the SiC nanofiber felt is assembled by roughly same-direction SiC nanofibers, and the SiC nanofibers are arranged in parallel or vertically in the polymer matrix. The scheme provided by the application can optimize the heat conduction path of the intelligent insulation material, and the high heat conduction and nonlinear volt-ampere characteristics of the material are considered, the problem of low heat dissipation efficiency of the packaging material is solved, the composite material is endowed with the electric field self-adaptive regulation and control ability of low-field insulation and high-field conduction through the nonlinear volt-ampere characteristics, and the aging breakdown problem of the composite material when facing the electric field distortion phenomenon is relieved.

The present invention relates to a direct-current power cable system capable of alleviating an electric field in a portion where space charges excessively accumulate inside a sleeve member of an ultra-high voltage direct-current power cable system, thereby preventing or minimizing electric field distortion and insulation breakdown of a cable joint box due to local electric field concentration.

Polymeric compositions comprising a polybutylene terephthalate; a low-density polyolefin selected from a low-density polyethylene, a polyolefin elastomer, or combinations thereof; and a maleated ethylene-based polymer. Optical cable components fabricated from the polymeric composition. Optionally, the polymeric composition can further comprise one or more additives, such as a filler. The optical fiber cable components can be selected from buffer tubes, core tubes, and slotted core tubes, among others.

The application discloses an organic-inorganic composite type silicone rubber tracking resistance agent and a preparation method and application thereof, and belongs to the technical field of silicone rubber modification and silicone rubber insulation materials. The organic-inorganic composite type silicone rubber tracking resistance agent is prepared by grafting an organic compound containing a triazole structure onto the surface of white carbon black and then kneading the organic compound with vinyl silicone oil. The obtained tracking resistance agent is used for preparing silicone rubber insulation materials. In the preparation of the silicone rubber insulation materials, a small amount of the tracking resistance additive prepared by the application is added, so that the tracking resistance performance of liquid silicone rubber can be significantly improved, and the mechanical properties are not reduced. After the surface is grafted with small molecules, hydrophobic treatment is performed, the compatibility of the tracking resistance agent and base rubber is further improved, and the tracking resistance performance is effectively improved. In addition, the preparation process is simple, industrial production is easy to realize, and the application prospect is wide in the field of electrical external insulation materials.

The application relates to the technical field of battery production, in particular to a battery device, an electric equipment and a preparation method of an electric connection assembly. The battery device comprises an electric connection assembly, the electric connection assembly comprises an electric connection piece and an insulating layer, the electric connection piece comprises a main body part and a connecting part connected with each other, and the insulating layer is arranged on the outer surface of the main body part through a molding process. The material of the insulating layer comprises silicone rubber, functional fillers and a curing agent, the weight percentage of the silicone rubber in the insulating layer is 50%-70%, the weight percentage of the functional fillers in the insulating layer is 20%-45%, and the weight percentage of the curing agent in the insulating layer is 5%-10%. The battery device can improve the utilization rate of raw materials of the insulating layer, and the material of the insulating layer comprises silicone rubber, functional fillers and a curing agent, so that the insulating layer can have insulation performance and high-temperature resistance.

This utility model discloses a wear-resistant carbon fiber composite core cable, relating to the field of cable technology. It includes a cable body and a core, with the core located at the center of the cable body. The core consists of multiple carbon fiber bundles and filler material between the carbon fiber bundles. An inner insulation layer is tightly wrapped around the core, and an outer insulation layer is fitted over the inner insulation layer. A protective layer is then provided on the outside, consisting of a buffer layer, a wear-resistant fiber layer, and a wear-resistant rubber layer, sequentially fitted from the inside out. This utility model significantly improves the wear resistance of the cable, extends its service life, reduces operating costs, and lightens its weight, facilitating installation and laying, by optimizing the cable's structure and materials.

This application relates to the field of cable technology, disclosing a flexible high-strength insulated cable material, its preparation method, and a power cable. The material formulation includes ethylene propylene diene monomer (EPDM) rubber, ethylene-octene copolymer, magnesium hydroxide, solid maleic anhydride, zinc methacrylate, α-methylstyrene dimer, dicumyl peroxide, and a compound antioxidant. During processing, the maleic anhydride undergoes ring-opening upon heating, consuming free water on the surface of magnesium hydroxide in situ, thus improving powder dispersion. The α-methylstyrene dimer acts as a chain transfer agent, inhibiting the long-chain homopolymerization of zinc methacrylate and preventing the formation of hard, brittle crosslinking points within the matrix. The polar graft ends and the hydroxyl groups on the magnesium hydroxide surface construct a reversible coordination network containing metal ion bonds. This invention solves the problems of difficult dehydration and brittle crosslinking in highly filled flame-retardant materials, enabling the material to dissipate strain energy through ion node slippage when stretched or bent, thus possessing high flame retardancy, high tensile strength, and excellent flexibility.

The application relates to a high-life anti-tension type environment-friendly cable special for street lamps, and relates to the cable technical field.The high-life anti-tension type environment-friendly cable special for street lamps comprises a plurality of cores, a plurality of anti-tension core cables and a wire protection layer, the plurality of cores are arranged side by side, each anti-tension core cable is arranged between two adjacent cores, the anti-tension core cable comprises twisted steel wires and a first insulation layer, the first insulation layer is sleeved with the twisted steel wires and abuts against the two sides of the core, and the wire protection layer wraps the core and the anti-tension core cable.The application is used to solve the problem that the current cable for street lamps has poor anti-tension property.

The application discloses a thermoplastic TPV elastomer composition and a preparation method and application thereof, and belongs to the technical field of polymer material modification. The thermoplastic TPV elastomer composition is prepared from butyronitrile rubber, long carbon chain nylon, a plasticizer, a vulcanizing agent, a compatibilizer, an antioxidant, a reinforcing agent, a light stabilizer and a color masterbatch, wherein the butyronitrile rubber has a Mooney viscosity of M L 100 DEG C (1+4) 42-76, the acrylonitrile content is 26%-42%, and the long carbon chain nylon has a melt flow rate of 5-30 g / 10 min under the condition of 235 DEG C / 2.16 kg. The butyronitrile rubber masterbatch and the long carbon chain nylon are dynamically vulcanized to prepare the TPV through a phase mixing method. The thermoplastic TPV elastomer composition prepared by the application has good heat resistance and mechanical properties, and meets the application requirements of the new energy automobile temperature-resistant 125 DEG C cable insulation material.

This invention relates to the field of power transmission line technology, specifically to lightweight anti-flashover insulation materials for high-voltage transmission lines, their preparation methods, and applications. The materials include a composite insulation substrate and an anti-flashover coating applied to its surface. The composite insulation substrate uses methyl vinyl silicone rubber as a matrix, doped with micro / nano-level fillers, and undergoes modification treatment to improve interfacial adhesion with the substrate. The anti-flashover coating uses polydimethylsiloxane as a matrix, incorporating modified micro / nano-level fillers, hydrophobic monomers, and functional additives, and is prepared using surface grafting technology. This invention uses methyl vinyl silicone rubber as a matrix and employs single, composite, or gradient doping methods with "micro / nano-level fillers," breaking through the technical bottleneck of existing technologies that either emphasize lightweighting or performance, achieving simultaneous improvements in "lightweighting, insulation, and mechanical strength."

The application belongs to the technical field of insulated cables, and discloses an energy-saving and environment-friendly overhead insulated cable, which comprises an outer protection assembly, and a plurality of cable assemblies are arranged in the inner portion of the outer protection assembly. The nickel-titanium shape memory alloy SMA fiber bundle in the outer protection assembly and the temperature-sensitive silicone rubber foam filling layer are matched with each other, so that self-adaptive adjustment under high and low temperature environments is realized. When facing high temperature in summer, the flexible extension of the nickel-titanium shape memory alloy SMA fiber bundle does not hinder thermal expansion, the temperature-sensitive silicone rubber foam expands to fill the gap, the cable assembly is fixed, and the conductor is prevented from being loose and drooping. When facing low temperature in winter, the nickel-titanium shape memory alloy SMA fiber bundle shrinks and becomes hard to form a rigid support, so that certain cold shrinkage tension is offset, the temperature-sensitive silicone rubber foam elastically shrinks to reserve a buffer space, and the cable is prevented from being excessively tightened and broken, so that high-temperature collapse prevention and low-temperature shrinkage prevention are realized.