321results about "Rubber insulators" patented technology

The invention provides a low-smoke halogen-free flame-retardant cable material and a preparation method thereof, and belongs to the field of cable materials. The low-smoke halogen-free flame-retardant cable material is prepared from the following chemical components: 32 to 40 parts of nitrile rubber, 22 to 27 parts of natural rubber, 8 to 12 parts of benzoxazole-siloxane copolymer containing phosphate dynamic bonds, 13 to 15 parts of core-shell-sheath three-stage structure flame retardant, 4 to 6 parts of hexaphenoxy cyclotriphosphazene modified carbon nanotubes, 2 to 3 parts of europium-doped mesoporous cerium dioxide and 3 to 4 parts of nano zinc oxide. The composite material is prepared from the following components in parts by weight: 3 to 4 parts of carbon nanotube grafted montmorillonite hybrid, 2 to 3 parts of lubricant, 0.8 to 1.2 parts of cross-linking agent, 0.3 to 0.4 part of accelerant, 0.4 to 0.6 part of dicumyl peroxide and 0.1 to 0.2 part of antioxidant. Unification of high flame retardance, low smoke, excellent mechanical property and processability of the cable material is realized.

The invention discloses a flexible fireproof cable and a preparation method thereof, and belongs to the technical field of cables. The cable comprises a conductor, a mica insulation layer, a copper protection layer, a buffer layer and a cable sheath layer. The buffer layer is made of a polyurethane foaming material; the cable sheath layer is prepared from the following components in parts by weight: 80 to 100 parts of methyl vinyl silicone rubber, 18 to 20 parts of modified carbon black, 5 to 8 parts of titanium dioxide, 1 to 2 parts of platinum catalyst, 3 to 6 parts of hydroxyl silicone oil, 0.5 to 1 part of zinc stearate and 0.8 to 1 part of dicumyl peroxide. The modified carbon black is added into the raw materials of the sheath layer, so that the compatibility, the interface bonding force and the flame retardant property of the carbon black and a silicone rubber matrix are effectively improved, and the mechanical property, the wear resistance and the fireproof property of the cable sheath layer are remarkably enhanced.

The invention relates to the technical field of cables, and provides an anti-aging insulated power cable. A conductor layer and an anti-aging outer sheath layer are sequentially arranged from inside to outside. The anti-aging outer sheath layer is prepared from the following raw materials in parts by weight: 55 to 65 parts of PVC (Polyvinyl Chloride) resin, 20 to 30 parts of ethylene propylene diene monomer, 10 to 15 parts of ethylene-vinyl acetate copolymer, 10 to 12 parts of modified kaolin, 18 to 20 parts of diisononyl phthalate, 4 to 5 parts of calcium-zinc composite stabilizer, 1.5 to 2 parts of antioxidant, 0.5 to 1 part of polyethylene wax and 0.5 to 0.7 part of calcium stearate; the modified kaolin is obtained by coating the surface of kaolin with nano silicon dioxide to obtain SiO2-coated kaolin and grafting the SiO2-coated kaolin with an ultraviolet absorbent. According to the anti-aging insulated power cable prepared in the invention, the problem that the ultraviolet absorbent may be decomposed, volatilized or migrated to fail in long-term use is solved, and the anti-aging stability of the insulating material in long-term operation is improved.

The invention discloses an industrial high-temperature-resistant cable, and belongs to the technical field of cables. The cable comprises a cable core and a sheath layer wrapping the cable core. The sheath layer comprises the following components in parts by weight: 32-38 parts of alkenyl polyvinyl chloride, 38-42 parts of methyl vinyl silicone rubber, 15-20 parts of modified basalt fibers, 1-2 parts of a vulcanizing agent, 6-10 parts of a plasticizer, 1-2 parts of a lubricant, 1-2 parts of a stabilizer and 0.3-0.8 part of an antioxidant. Functional modification is performed on the surface of the basalt fiber, so that the basalt fiber and a polymer matrix of the cable sheath can form a multi-layer and firm chemical structure, and the comprehensive performance of the sheath material is effectively improved.

The invention discloses a corrosion-resistant medium-voltage power cable, which relates to the technical field of cables and comprises a cable core, a shielding layer, a fireproof layer, an armor layer and an outer sheath layer which are sequentially arranged from inside to outside. The cable core is composed of a plurality of insulated wire cores which are mutually twisted. Each insulated wire core is composed of copper wires which are mutually twisted and insulating layers which are sequentially wrapped outside the copper wires which are mutually twisted. A filling material is filled between the cable core and the shielding layer; according to the corrosion-resistant medium-voltage power cable disclosed by the invention, through a synergistic effect of a multi-layer composite structure design and a special modified material, excellent comprehensive performance is realized, and the corrosion-resistant medium-voltage power cable has excellent conductivity, electrical insulativity and mechanical strength and also shows outstanding corrosion resistance, weather resistance, flame retardance and waterproofness; the cable is especially suitable for ocean, underground, chemical plants and other application scenes with strong corrosivity and severe environmental conditions, and can maintain long-term stable operation in extreme environments.

The environment-friendly cable ethylene-propylene insulation material comprises the following raw materials: ethylene propylene diene monomer, an elastomer, a reinforcing agent, a flame retardant, a vulcanizing activator, a filler, a plasticizer, an anti-aging agent, a vulcanizing agent and a silane coupling agent. 50-70 parts by mass of ethylene propylene diene monomer rubber; the elastomer is a POE (polyolefin elastomer) of 30-50 parts; the flame retardant is prepared from 30 to 50 parts of nano magnesium hydroxide, 5 to 10 parts of microencapsulated red phosphorus and 3 to 5 parts of zinc borate; and the plasticizer is paraffin oil. According to the ethylene-propylene insulating material, a halogen-free flame-retardant system is combined with an interface modification technology, so that the defects of poor mechanical property and high material toxicity of a traditional material are overcome. The oxygen index is greater than or equal to 38%, the tensile strength is greater than or equal to 10Mpa, and the material is suitable for high-risk mine environments.

The invention relates to the technical field of overhead conductors, and provides a corrosion-resistant overhead insulated conductor and a preparation method thereof. The corrosion-resistant overhead insulated wire sequentially comprises a conductor, an insulating layer and a sheath layer from inside to outside, and raw materials of the sheath layer comprise nitrile rubber, ethylene propylene diene monomer, a compatilizer, an activating agent, an anti-aging agent, filler, a softening agent, a plasticizer, a vulcanizing agent, an accelerant and a reinforcing agent; the preparation method of the reinforcing agent comprises the following steps: A1, cleaning aramid pulp, adding the aramid pulp into a calcium chloride solution, stirring, cleaning and drying to obtain pretreated aramid pulp; a2, mixing the pretreated aramid pulp and phenolic resin to obtain the reinforcing agent. According to the technical scheme, the problem of poor tensile strength of the sheath layer of the corrosion-resistant overhead insulated wire in the prior art is solved.

The invention relates to the technical field of polymer insulating materials, in particular to a flexible low-smoke halogen-free polypropylene insulating material and a preparation method thereof. The invention discloses an ultra-soft low-smoke halogen-free polypropylene insulating material, which comprises the following components in parts by weight: 50-80 parts of block co-polypropylene; 10 to 40 parts of organic silicon rubber; 0.06 to 0.24 part of a bis-2, 5 vulcanizing agent; the material further comprises an antioxidant, a compatilizer, a flame retardant, a flame retardant synergist, a lubricant and the like. The insulation material provided by the invention is good in flexibility and convenient to install and lay under the condition of ensuring that the polypropylene cable material meets flame-retardant energy absorption and electrical insulation properties. The preparation method of the insulating material adopts a dynamic vulcanization technology, and the organic silicon rubber is distributed in the polypropylene material in a'sea-island 'or'sea-sea' structure, so that the hardness of the matrix resin is reduced on the premise of ensuring the mechanical property of the material. Meanwhile, a surface modification mode of the flame retardant is optimized, so that the hardness of the material is further reduced. And the odor emission of the material in the production and use processes can be effectively reduced, so that the material is more environment-friendly.

The invention provides a preparation method of a novel cable sheath layer. The novel cable sheath layer comprises silicone rubber, a heat-conducting insulating material, a flame-retardant material, white carbon black, a silane coupling agent, dicumyl peroxide, silicone oil, an antioxidant, a light stabilizer and the like. The preparation method comprises the following steps: firstly, modifying a heat-conducting insulating material and a flame-retardant material to improve the dispersity and interfacial compatibility, and then uniformly dispersing filler in a silicone rubber matrix through banburying, open milling and vulcanization processes to finally form a high-performance cable sheath layer. Nanometer spherical aluminum oxide grafted hexagonal boron nitride is used as a heat-conducting insulating material, so that the heat conductivity of the sheath layer is remarkably improved, and excellent electrical insulation performance is kept. Besides, modified magnesium-rich silicate is used as a flame-retardant material, so that the cable has an excellent flame-retardant effect, and an antioxidant and a light stabilizer are combined, so that the weather resistance and the aging resistance of the sheath layer are improved. The prepared cable sheath layer is suitable for the fields of high-voltage cables, 5G communication, power transmission, aerospace, military use, rail transit and the like, and has a good application prospect.

The invention relates to the field of high-performance flame-retardant materials and discloses an ultra-light flame-retardant rubber foam material and a preparation method and application thereof.The ultra-light flame-retardant rubber foam material is prepared from modified carboxy nitrile rubber, a foaming agent, a foaming aid, a cross-linking agent, a flame retardant, inorganic filler, tackifying resin and a softening agent; the modified carboxy nitrile rubber is prepared by chemically grafting hexamethylol melamine. According to the invention, a nitrogen-containing structure is introduced into a polymer molecular chain, so that the material has intrinsic flame retardant property, high foaming ratio and light weight are realized, and the problems of density increase and performance degradation caused by high filling of a flame retardant in the traditional technology are avoided. The flame retardant property of the material reaches UL-94 V0 level, and the material is suitable for the fields of building heat preservation, automotive trim, cable sheaths and household appliance shock pads.

The invention relates to the technical field of cables, in particular to a high-flexibility ethylene-propylene insulating rubber material for a charging pile cable and a preparation process. The composite material comprises an ethylene propylene diene monomer, a thermoplastic polyolefin elastomer, an ethylene-butylene copolymer, nanoscale magnesium hydroxide, a silane coupling agent, dicumyl peroxide, a hindered phenol antioxidant and a phosphite antioxidant. The ethylene propylene diene monomer and the ethylene-butylene copolymer form a flexible network skeleton, and the ethylene-butylene copolymer and the thermoplastic polyolefin elastomer are subjected to molecular-level blending, so that the elongation at break and the bending fatigue resistance are improved; silane coupling agent modified nano magnesium hydroxide is chemically bonded with a rubber matrix, so that the flame retardance and thermal aging resistance are enhanced, and the negative influence of filler agglomeration on flexibility is reduced; the compound antioxidant system effectively inhibits thermal oxidation degradation at high temperature, avoids insulation failure, realizes collaborative optimization of high flexibility and high heat resistance, and improves the reliability and applicability of the charging pile cable.

The invention provides a high-hardness easy-to-cut silicone rubber material as well as a preparation method and application thereof. The high-hardness easy-to-cut silicone rubber material comprises the following components in parts by weight: 100 parts of methyl vinyl silicone rubber, 25-40 parts of fumed silica, 1.5-3 parts of hydroxyl silicone oil, 0.8-1.2 parts of a cross-linking agent, 0.05-0.1 part of a platinum catalyst and 1-2 parts of a heat-resistant stabilizer. Through screening and synergistic compounding of specific components in the silicone rubber material, synergistic optimization of shore hardness and elongation at break of the silicone rubber material is realized, and the silicone rubber material is ensured to be free of cracks after being aged at 180 DEG C for 3000 hours and still has an excellent elongation at break retention rate after being aged.

The invention relates to the technical field of cable processing, and discloses a magnesium hydroxide-silicone rubber flame-retardant cable filling material and a preparation method thereof.The preparation method comprises the following steps that KH-570 hydrolysate is dropwise added into magnesium hydroxide dispersion liquid, and modified magnesium hydroxide is obtained through a reaction; dispersing the modified magnesium hydroxide, PCS and a first catalyst in an organic solvent, and reacting in an inert gas atmosphere for 2-4 hours to obtain PCS-coated magnesium hydroxide; modifying the PCS-coated magnesium hydroxide with a silane coupling agent to obtain modified PCS-coated magnesium hydroxide; silicone rubber, modified PCS coated magnesium hydroxide, fumed silica and hydroxyl silicone oil are mixed to form a rubber material; and adding a cross-linking agent and a second catalyst, and reacting to obtain the flame-retardant cable filling material. According to the invention, after magnesium hydroxide is coated with PCS, the silane coupling agent is adopted for modification, and when the material encounters high temperature or flame, a firm and compact ceramic protection layer can be generated, so that the effects of heat insulation, oxygen insulation and melting and dripping prevention are achieved.

The invention discloses an anti-embrittlement flexible armored cable in an extremely cold environment. The anti-embrittlement flexible armored cable comprises a conductor, an insulating layer, a buffer isolation layer, a flexible armored layer and an outer sheath layer which are sequentially arranged from inside to outside. According to the armored cable, the structure of an existing cable is improved, the material formula of the insulating layer and the material formula of the outer sheath layer are optimized, the requirements for embrittlement resistance and high flexibility can be met, the protection performance of the armored cable can be enhanced, and aging tests show that the cable has good flexibility. The cable can meet the use requirement of long-term stable operation under the extremely cold severe condition with the temperature of-60 DEG C, has important practical significance and economic value, is reasonable in design, and is worthy of popularization and use.

The invention relates to the technical field of external insulating materials for power equipment, in particular to silicone rubber, a preparation method thereof and application of the silicone rubber in a composite insulator. The silicone rubber is prepared from the following raw materials in parts by weight: 100 parts of methyl vinyl silicone rubber raw rubber, 5-20 parts of hydrophobic silicon dioxide aerogel powder, 3-15 parts of conductive and heat-conducting filler, 10-30 parts of modified aluminum hydroxide, 15-35 parts of fumed silica, 1-3 parts of a silane coupling agent and 2-5 parts of a structuring control agent, 1-4 parts by weight of a low surface energy auxiliary agent, and 0.5-2 parts by weight of a vulcanizing agent. The silicone rubber provided by the invention integrates long-acting hydrophobic anti-icing, active low-power-consumption ice melting and excellent arc ablation resistance, has long-term stability, and is especially suitable for high-voltage insulators in severe environments such as heavy ice areas and heavy dirty areas.

The invention provides a high-flame-retardant cable and a preparation method thereof, and belongs to the technical field of cables, and the preparation method comprises the following steps: S1, preparing an insulating layer-conductor material; s2, preparing an insulating layer-conductor filling composite material; and S3, putting an ethylene-vinyl acetate copolymer, an ethylene-octylene copolymer, a flame retardant and montmorillonite into the internal mixer, performing internal mixing and extrusion to obtain a sheath material, and sequentially coating the insulating layer-conductor filling composite material, the semi-conductive layer, the shielding layer and the sheath along the axial direction of the conductor to obtain the high-flame-retardant cable. According to the technical scheme provided by the invention, the purposes of good flame retardance and good smoke suppression performance of the cable are achieved.

A silicone rubber insulator shed material, and a silicone rubber insulator and a preparation method therefor and an application thereof. The components of the silicone rubber insulator shed material comprise silicone rubber, iron oxide, nano-montmorillonite, fumed silica, aluminum hydroxide, a silane coupling agent, a vulcanizing agent, and hydroxy silicone oil, wherein the iron oxide and the nano-montmorillonite can slow down the thermal oxidation decomposition of the silicone rubber, thus improving the hydrophobicity, hydrophobic mobility and hydrophobic recovery of the silicone rubber composite insulator, thereby solving the technical problem in the prior art that the aging decomposition resistance of silicone rubber needs to be improved.

The present invention relates to the technical field of magnetic attraction lines, and in particular, to a magnetic attraction line convenient to store, including a line body and a connector, where line cores are connected into the line body, outer surfaces of the line cores are covered with an injection molding layer, an outer surface of the injection molding layer is coated with a magnetic attraction layer, an outer surface of the magnetic attraction layer is coated with a protection layer, and an isolation and protection layer is disposed between the magnetic attraction layer and the injection molding layer. Through a coating connection between the magnetic attraction layer and the injection molding layer, and under the action of the magnetic attraction layer, a magnetic attraction connection effect of the line bodies is achieved, and then a magnetic storage effect of the line bodies is achieved.

The invention relates to the field of cable materials, in particular to a wear-resistant modified rubber cable material for a new energy automobile and a preparation method of the wear-resistant modified rubber cable material, and aims to solve the problems that an existing cable material for the new energy automobile is insufficient in wear resistance and mechanical strength, so that a cable is easy to crack, and potential safety hazards are caused. And the use requirements of the new energy automobile in a complex environment are difficult to meet. According to the preparation method, wear-resistant modified rubber, styrene-butadiene rubber and low-density polyethylene are used as matrixes, the comprehensive performance of the cable material is remarkably improved by integrating the advantages of the three materials, and then modified potassium titanate whiskers are added, so that the wear resistance and mechanical strength performance of the cable material are effectively improved; the cable can meet the use requirements of a new energy automobile in a severe environment, shows excellent protection performance, effectively prolongs the service life of the cable, and provides a cable transmission system which is longer in service life, safer and more reliable for the new energy automobile.

The invention relates to the technical field of cable sheath preparation, and discloses a cable sheath which comprises the following components in parts by weight: basic rubber materials: vinyl-terminated methyl vinyl silicone rubber and crosslinked polyethylene; the synergistic flame-retardant system is prepared from zinc borate, ammonium polyphosphate, melamine, pentaerythritol and composite modified nano montmorillonite; the nano composite additive is prepared from nano silicon dioxide, nano zinc oxide, nano boron nitride and graphene; an interface compatilizer: maleic anhydride grafted polyethylene; according to the invention, through component optimization and synergistic cooperation, on the premise of not depending on a halogen flame retardant, high flame retardance, excellent mechanical properties and stable aging resistance are realized at the same time, and strict requirements of high-end cables on safety and reliability are met. Besides, the material preparation process is simple and controllable, is suitable for large-scale production, and can be widely applied to the fields of high-rise buildings, rail transit, new energy and the like with high requirements on the performance of the cable sheath.

An insulation material for a power cable of a low-voltage wind turbine generator, and a preparation method, belonging to the technical field of wind power generation. By combining the properties of multiple raw materials and leveraging the respective strengths thereof, the present invention exhibits properties such as excellent aging resistance, high and low temperature resistance and high strength. A composite of three anti-aging agents, anti-aging agent RD, anti-aging agent MB and anti-aging agent XH-3, is used to comprehensively improve the heat resistance of the insulation. Compared with a single anti-aging agent, the anti-aging agents can have a synergistic effect, resulting in superior heat resistance, and the tensile strength and elongation at break thereof can remain at a high level after thermal aging. By means of optimization of the formula, the cable meets environmental protection requirements.

The invention discloses a preparation method and application of a silicone rubber / crosslinked polyethylene composite medium for cable accessories, and belongs to a preparation method and application of a composite medium. The invention aims to solve the problems that in the prior art, along with long-term operation of a cable, silicone grease can be diffused into silicone rubber, the swelling phenomenon occurs, the insulating property of the silicone rubber is reduced, and the failure rate is increased. The method comprises: 1, preparing silicone rubber; 2, preparing crosslinked polyethylene; 3, preparing doped modified silicone grease; and 4, coating the modified silicone grease on the surface of the silicone rubber, and then covering crosslinked polyethylene. 2, 2, 3, 5, 6-tetrafluoro-7, 7 ', 8, 8'-tetracyanodimethyl p-benzoquinone is introduced into silicone grease as a filler to construct a carrier trap and hinder injection and transmission of carriers. Under the synergistic effect of the filler and the silicone grease, the acting force between molecules is enhanced, and the slippage of the silicone grease is reduced, so that the electrical insulation characteristic of a composite interface of the silicone rubber and the crosslinked polyethylene is further improved.

The invention relates to a protective sleeve for a flame-retardant cable, a preparation method of the protective sleeve and the flame-retardant cable. The protective sleeve for the flame-retardant cable comprises the following components in parts by weight: 40-60 parts of chlorinated polyethylene, 1-10 parts of a polyolefin elastomer, 1-10 parts of modified magnesium hydroxide, 1-10 parts of an antimony-containing flame retardant and 1-8 parts of modified magnesium-aluminum hydrotalcite. The flame-retardant cable comprises a conductor, an insulating layer and the protective sleeve, wherein the insulating layer comprises the following components in parts by weight: 40-60 parts of ethylene propylene diene monomer and 30-60 parts of modified magnesium hydroxide. The formula of the protective sleeve for the flame-retardant cable is reasonably designed, so that the prepared protective sleeve has excellent flame retardance, torsion resistance and aging resistance. The flame-retardant cable is further matched with a protective sleeve and an insulating layer containing modified magnesium hydroxide, and the flame-retardant cable which is suitable for wind power generation and passes an A-type bunching combustion test is prepared.

The invention discloses an algicidal and bacteriostatic room temperature vulcanized silicone rubber insulating material and a preparation method thereof, and belongs to the technical field of electrical insulating materials. The material is composed of quaternary ammonium salt group-containing hydroxyl-terminated polysiloxane (QASPS) as a base adhesive, a solvent, a reinforcing filler, a cross-linking agent and a catalyst, wherein the QASPS is used for grafting a quaternary ammonium salt group derived from quaternization reaction of N, N-dimethyl octylamine and chloropropyl to a polysiloxane main chain through a covalent bond. Through molecular structure innovation, the antibacterial components are stably immobilized in a cross-linked network, and the problem that the insulativity is affected due to the fact that an antibacterial agent added in a traditional physical mode is easy to dissolve out is fundamentally solved. The prepared silicone rubber material has long-acting antibacterial property, excellent electrical insulation property and good mechanical strength, is particularly suitable for solving the problem of microbial aging on the outer insulation surface of power equipment in high-humidity areas such as tropical areas and subtropical areas, and ensures safe and stable operation of a power grid.

The application belongs to the technical field of cable materials, and discloses a cold-resistant and anti-cracking type special cable made of silicone rubber, which comprises a conductor cable core, an inner protective sleeve and an outer protective sleeve from inside to outside, wherein the raw materials of the outer protective sleeve comprise end-vinyl diphenyl siloxane, methyl vinyl siloxane, silane modified nano silicon dioxide, polyborosiloxane, an inhibitor, hydroxyl silicone oil, modified anti-ultraviolet polyurethane, a platinum catalyst and tetra(dimethylsiloxane) silane; diphenyl siloxane with a diphenyl side chain is selected as a main chain, and the modified anti-ultraviolet polyurethane is grafted to effectively destroy the structural regularity, inhibit low-temperature crystallization and prevent cable cracking; 4,4'-diamino benzophenone with anti-ultraviolet function is used as a chain extender and benzotriazole is used as an end-capping agent to be grafted into the polyurethane chain, so that the anti-ultraviolet capacity can be improved and migration can be avoided.

The invention relates to a heat-conducting intelligent insulating material with nonlinear volt-ampere characteristics, a preparation method and application thereof, and belongs to the technical field of insulating materials. The intelligent insulating material comprises a polymer matrix and a SiC nanofiber felt in the polymer matrix, the volume fraction of the SiC nanofiber felt is 0.5%-2% of that of the polymer matrix, and the SiC nanofiber felt is formed by stacking and assembling SiC nanofibers which are approximately in the same direction; the SiC nanofibers are arranged in parallel or vertically in the polymer matrix. According to the scheme provided by the invention, the heat conduction path of the intelligent insulating material can be optimized, 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, and the composite material is endowed with low-field-insulation and high-field-conduction electric field self-adaptive regulation and control capability through the nonlinear volt-ampere characteristics; and the problem of aging breakdown when the composite material is faced with an electric field distortion phenomenon is relieved.

The invention discloses a production method of a high-structural-strength insulating steel tape armored multi-core power cable. The power cable comprises a conductor unit and an insulating layer from inside to outside, wherein the conductor unit is formed by twisting and pressing a conductor with a copper base material, the conductor unit is wrapped outside the conductor, the overlapping rate of the conductor unit is larger than or equal to 50%, and the insulating layer is formed by semi-conductive ceramic silicone rubber and / or crosslinked polyethylene. The double-layer wrapping tape is composed of ceramic silicone rubber filling strips and assists the insulating core wires to be twisted into a cable and is of a filling structure; an inner sheath made of a ceramic silicone rubber material; the composite armor layer is composed of an inner-layer galvanized steel band and an outer-layer stainless steel band; the buffer layer is composed of an aramid fiber woven mesh or a ceramic fiber belt; and the outer sheath is composed of ceramic silicone rubber or a low-smoke halogen-free flame-retardant material of which the oxygen index is greater than or equal to 40. The cable is high in structural strength, good in temperature resistance and high in impact resistance, high-temperature mechanical locking is achieved through tension-controlled double-layer reverse wrapping, and the performance of the cable is greatly improved.

The invention provides a flame-retardant signal cable and a manufacturing method thereof, the flame-retardant signal cable comprises a cable core and a protective layer wrapping the outer side of the cable core, the cable core comprises at least one wire group and a filling rope, the wire group and the filling rope are twisted to form the cable core, and the protective layer is arranged on the outer side of the cable core. Each wire group comprises a plurality of insulating single wires which are arranged in a stranded manner, and a braided shielding layer and a high-temperature-resistant loose sleeve which are arranged outside the insulating single wires from inside to outside in sequence, and each insulating single wire comprises a conductor, and a first insulating layer and a second insulating layer which are arranged outside the conductor from inside to outside in sequence; the first insulating layer comprises a porcelainized silicone rubber composite tape layer and a synthetic mica tape layer arranged on the outer side of the porcelainized silicone rubber composite tape layer, and the porcelainized silicone rubber composite tape layer is arranged on the outer side of the conductor; the cable has high-temperature ceramization capability, interlayer connection stability and multi-stage flame-retardant synergistic effect, the flame-retardant capability of the cable is improved, and the technical requirement of flame-retardant grade B1 is met.

The invention relates to the field of power cables, and particularly discloses an acid and alkali resistant waterproof power cable. The acid and alkali resistant waterproof power cable comprises a conductor layer, an insulating layer and a sheath layer which are sequentially arranged from inside to outside, the preparation method comprises the following steps: S1, preparing the conductor layer: smelting electrolytic copper, tin, silver and rare earth elements, and then performing wire drawing, and controlling the wire drawing speed to be 10-15m / s to obtain a conductor wire core; s2, extrusion of an insulating layer: mixing fluororubber, epichlorohydrin rubber, nano-silica and a flame retardant, and extruding the mixture at 70-90 DEG C by a twin-screw extruder to coat the conductor layer; s3, extruding a sheath layer: mixing the raw materials, and coating the raw materials outside the insulating layer at 60-85 DEG C by a single screw extruder; s4, irradiation crosslinking: carrying out electron beam irradiation on the coated cable; and S5, cooling and rolling. The cable can be used in a highly corrosive environment, and has the advantage of avoiding premature failure of the sheath layer of the power cable in the highly corrosive environment.

The invention relates to the technical field of cables, and provides a wear-resistant tensile cable and a preparation method thereof. The wear-resistant tensile cable comprises a conductor layer and a sheath layer coating the surface of the conductor layer, the sheath layer is prepared from the following raw materials in parts by weight: 50-55 parts of nitrile rubber, 8-10 parts of polystyrene-polybutadiene-polystyrene, 15-20 parts of polyurethane, 20-24 parts of modified nano titanium dioxide, 10-12 parts of composite cellulose reinforced master batch, 5-8 parts of glass fiber, 3-5 parts of a silane coupling agent, 3-4 parts of a composite flame retardant, 0.2-0.3 part of an ultraviolet light absorber and 1.2-1.5 parts of a cross-linking agent. According to the wear-resistant tensile cable prepared in the invention, the wear resistance and tensile resistance of the cable are enhanced, and the cable also has certain aging resistance.