109results about "Rubber insulators" patented technology

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 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 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 present invention relates to an electrical cable (1), particularly well suited for the transport of low voltage energy, comprising at least one electrically insulating layer (3) surrounding at least one elongated electrically conductive element (2), wherein said insulating layer (3) is obtained from a thermoplastic polymer composition comprising a homophasic propylene polymer; and a heterophasic ethylene copolymer, present at a level of less than 40% by weight relative to the total weight of polymers in the thermoplastic polymer composition.

The present invention discloses a rubber composition, a processing method thereof, and rubber product reinforced with silica using the same. The rubber composition comprises a rubber matrix and essential components, wherein, based on 100 parts by weight of the rubber matrix, the rubber matrix comprises, a branched polyethylene with a content represented as A, in which 0<A≤100, and an EPM and an EPDM with a total content represented as B, in which 0≤B<100; and the essential components comprise 1-10 parts of a crosslinking agent and 15-80 parts of silica. The rubber composition can be used for producing high-voltage insulating sheath rubber, high-temperature resistant conveyor belt, waterproof coil, rubber particles for plastic track surface layer, rubber plug, rubber roller, inner tube, tire tread, tire sidewall, and inner rubber layer of air-conditioner hose.

A resin composition, containing: a component (A) being a base resin containing an ethylene-α-olefin random copolymer including an α-olefin component having 4 to 12 carbon atoms; a component (B) being a wet dispersant; a component (C) being an antioxidant; and a component (D) being a crosslinking aid, wherein the ethylene-α-olefin random copolymer including the α-olefin component having 4 to 12 carbon atoms has a crystallinity of 15 to 24%, and wherein a content of the component (B) is 2 to 10 parts by mass with respect to 100 parts by mass of a content of the component (A).

The invention relates to the field of nuclear cable manufacturing, in particular to a radiation-resistant cable for a nuclear power platform and a preparation method of the radiation-resistant cable. According to the nuclear cable, the five-layer structural design of conductor-insulation-shielding-polyimide film-sheath is adopted, the overlapping wrapping technology of the polyimide film is combined, and the comprehensive performance of the cable in the extreme environment of a nuclear power platform is comprehensively improved. The low-smoke halogen-free flame-retardant ethylene-propylene rubber is adopted as an insulating material, and through the cooperation of an EPDM / POE blending system and the ternary composite flame retardant, the insulating property is stable under the condition of ensuring radiation, and the flame retardant property is excellent. The sheath material is added with the intumescent flame retardant and the polysilazane modifier, so that the cable has no crack at the low temperature of-40 DEG C, the bending radius can be controlled to be less than 5 times of the outer diameter, and the cable is adaptive to the layout of a narrow cabin. Through the synergistic effect of material innovation and structural design, the balance of flame retardant property, mechanical property, radiation resistance, low temperature resistance, aging resistance and small-space applicability of the nuclear cable is realized.

The invention discloses an online monitoring alarm network system based on a lightning protection environment, and relates to the technical field of lightning protection monitoring, and the system comprises a data collection module which is disposed at an offshore wind power plant and is used for collecting multi-dimensional data including salt mist concentration, wind speed, lightning parameters and lightning protection equipment state parameters; the data processing module is in communication connection with the data acquisition module and is used for receiving, fusing and analyzing the multi-dimensional data, performing scoring calculation by constructing a quantitative scoring model and endowing each dimensional parameter with a weight, and outputting a quantitative risk level according to a total score interval judgment mode; the early warning and linkage module is in communication connection with the data processing module and is used for executing graded early warning and linkage control based on the risk grades; the data processing module is further used for calculating the health state index of the SPD and dynamically predicting the remaining effective life of the SPD based on the health state index and the real-time environment parameters. The system has the functions of self-adaption to environment change and lightning protection monitoring and early warning.

Disclosed is a high-voltage winding (130), comprising a winding body (1310), a high-voltage coil (1320), a high-voltage insulating layer (1330), and an external insulating layer (1340). The winding body (1310) comprises a plurality of winding plates (1313, 2311, 1316); the plurality of winding plates (1313, 2311, 1316) are uniformly distributed in the circumferential direction of the winding body (1310); a wire is wound on the winding plates (1313, 2311, 1316) to form the high-voltage coil (1320); two ends of the wire form two external connections (D, X); the high-voltage insulating layer (1330) wraps the high-voltage coil (1320) and the winding body (1310); and the external insulating layer (1340) wraps the side walls of the external connections (D, X). Further disclosed is a dry-type transformer (10). The high-voltage winding (130) uses the external insulating layer (1340) to wrap the side walls of the external connections (D, X), thereby preventing the permeation of water vapor, ensuring the sealing effect, and effectively avoiding the problem of discharge of a wire outlet end.

The invention discloses an urban underground corrosion-resistant and wear-resistant power cable, and belongs to the technical field of cable production. The cable comprises an insulating layer, and raw materials of the insulating layer comprise the following components in percentage by mass: 45-49% of silane crosslinked polyethylene, 50-54% of fluororubber particles and 1-5% of boron nitride nano powder; the shielding layer is a silver-plated copper net filled with fluororubber; and a sheath layer; the sheath layer is prepared from the following raw materials in percentage by mass: 2-3% of molybdenum disulfide, 4-7% of tungsten carbide and the balance of fluororubber. According to the scheme, the raw material components used by the cable are designed, so that the wear resistance and the corrosion resistance of the power cable are synchronously improved.

The invention discloses a 105 DEG C environment-resistant cable meeting the UL2277 standard and a preparation method thereof, the cable comprises a conductor, an insulating layer and a sheath layer, the cable can be designed into a single-core or multi-core structure, the insulating layer takes ethylene-propylene-diene monomer and LDPE as base materials, and the base materials are matched with chemical method magnesium hydroxide and an organic composite flame retardant; the sheath layer uses CPE and EVA as composite base materials, and cooperates with magnesium hydroxide, aluminum hydroxide and antimony trioxide to construct a synergistic flame-retardant system. By optimizing the material formula and the structural design, the cable has excellent mechanical, flame-retardant, aging-resistant and oil-resistant properties in a dry environment of 105 DEG C, is suitable for fixed laying of a wind power generation tower drum and torsion laying of a cabin, is simple in preparation process and is suitable for large-scale production.

The application relates to the technical field of insulating materials, and discloses a preformed cable accessory insulating material, a preparation method thereof and a preformed cable accessory. The preformed cable accessory insulating material is composed of the following raw materials in parts by mass: 100 parts of ternary ethylene-propylene rubber, 40-70 parts of reinforcing filler, 20-40 parts of plasticizer, 1.5-3.5 parts of crosslinking agent, 1-3 parts of crosslinking aid, 1-3 parts of antioxidant, and 1-5 parts of processing aid. By introducing the antioxidant with a specific structure, the oxidation resistance and degradation resistance of the material in a complex environment such as high temperature, humidity and electric field are enhanced, the aging process of the insulating material is effectively delayed, and the material can better maintain the original performance in long-term use. Through the synergistic optimization of the formula components and process parameters, the dispersion uniformity of the material in the mixing process is improved, the pre-crosslinking risk is reduced, the vulcanization efficiency and quality stability are improved, so that the production process is more controllable, and the product quality is more consistent.

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 disclosure relates to an elastomeric material for providing electrical stress control comprising high structure carbon black and high permittivity inorganic fillers. The elastomeric material of the present disclosure exhibits high permittivity and low dissipation factor.

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 invention relates to the field of cable materials, in particular to an ethylene propylene rubber insulation material for a charging pile cable and a preparation method thereof. An ethylene propylene rubber insulation material for a charging pile cable has a functional gradient structure, and comprises: an inner layer insulation area composed of graft modified ethylene propylene rubber, a reversible cross-linking agent and an antioxidant; the transition fusion area contains a surface-modified heat-conducting filler; the outer-layer functional area contains a heat-conducting filler and a flame retardant; the whole insulation material forms a continuous network through thermal reversible crosslinking, can be decrosslinked at 130-150 DEG C, and can be re-crosslinked at 150-170 DEG C. By means of the functional gradient structure, precise partition cooperation of insulation, heat conduction and flame retardant performance is achieved, meanwhile, the irreversible limitation of a traditional insulation material is broken through, the core requirements for insulation reliability, heat dissipation efficiency and flame retardant safety in the operation process of the charging pile are met, and the charging pile has the advantages of being repairable, recoverable and flexible to machine.

The application relates to the technical field of cables, and particularly discloses a fireproof polyvinyl chloride cable sheath, a preparation method thereof and a cable. The fireproof polyvinyl chloride cable sheath comprises the following raw materials in parts by weight: polyvinyl chloride resin 30-40 parts, methyl vinyl silicone rubber 10-20 parts, filler 3-6 parts, anti-aging agent 1-3 parts, antioxidant 1-5 parts, fireproof agent 9-12 parts and compound 6-15 parts; the preparation method is as follows: the polyvinyl chloride resin, the methyl vinyl silicone rubber and the compound are uniformly mixed, heated and melted to obtain a mixture; the filler, the anti-aging agent, the antioxidant and the fireproof agent are added into the mixture, uniformly stirred and extruded into a shape to obtain the fireproof polyvinyl chloride cable sheath. The fireproof polyvinyl chloride cable sheath has the advantages of improving the fireproof performance of the cable through the synergistic effect of the raw materials.

The invention discloses a B1-level high-flame-retardant direct-current traction cable for rail transit and a preparation method of the B1-level high-flame-retardant direct-current traction cable, and belongs to the technical field of rail transit cables. The B1-level high-flame-retardant direct-current traction cable comprises a conductor, and a conductor shielding layer, an insulating layer, an insulating shielding layer, a metal shielding layer, an isolation sleeve, a flame-retardant filling layer, a belting layer and an outer sheath which are sequentially arranged on the periphery of the conductor in a sleeving manner from inside to outside; the insulating shielding layer is made of semi-conductive ethylene propylene rubber, the metal shielding layer is formed by weaving copper wires, the isolation sleeve is made of polyolefin elastomers, the flame-retardant filling layer is made of flame-retardant glass fiber ropes, and the flame-retardant filling layer is made of flame-retardant glass fiber ropes. The wrapping tape layer is made of a high-flame-retardant polyester film tape, and the outer sheath is made of B1-level high-flame-retardant low-smoke halogen-free polyolefin. Through the multi-layer collaborative design of the B1-level outer sheath, the ethylene propylene rubber insulation and composite flame retardant, the flame-retardant filling layer and the high-flame-retardant wrapping tape layer, the whole cable reaches the B1-level high-flame-retardant standard.

A pre-expanded cover assembly for protecting a cable splice connection including a cable, the cable including an electrical conductor surrounded by a cable insulation layer, includes a splice body assembly and a removable holdout. The splice body assembly includes a tubular, cold-shrinkable, electrically insulative, elastomeric splice body having an interior surface defining an interior passage. The splice body assembly further includes a tubular layer of a conformable medium pre-mounted on the interior surface of the splice body. The conformable medium is a flowable material having a high electrical permittivity. The splice body assembly is mounted on the holdout such that the holdout maintains the splice body in an elastically radially expanded state, and the holdout is selectively removable from the splice body to permit the splice body to elastically radially contract. The layer of the conformable medium is positioned and configured such that, when the pre-expanded cover assembly is positioned adjacent the cable splice connection, the holdout is removed from the splice body, and the splice body elastically radially contracts onto the cable splice connection, the layer of the conformable medium will be radially interposed between and engage each of the interior surface of the splice body and an opposing interface surface of the cable insulation.

This resin composition is provided to cover a conductor of a power cable, and constitutes an insulating layer having an inner peripheral surface facing the conductor and an outer peripheral surface opposite to the inner peripheral surface. The resin composition includes: a base polymer that contains propylene units; a modified polymer that contains the propylene units and that is modified by at least one selected from an unsaturated organic acid and a derivative thereof; and a thermoplastic elastomer. The resin composition is configured such that the ratio of the storage elastic modulus of an inner sample of the insulating layer to the storage elastic modulus of an outer sample of the insulating layer is 1.1 or more and 2.5 or less, and the ratio of the volume resistivity of the inner sample to the volume resistivity of the outer sample is 1.0 or more and 1.5 or less. Here, the outer sample of the insulating layer is collected from a position of 0.3 mm from the outer peripheral surface toward the conductor, the inner sample of the insulating layer is collected from a position of 0.3 mm from the inner peripheral surface toward the outer peripheral surface, and the storage elastic modulus of the outer sample and the storage elastic modulus of the inner sample are measured at 25°C by dynamic viscoelasticity measurement.

The utility model discloses an uvioresistant high-temperature-resistant photovoltaic outdoor cable, which relates to the technical field of photovoltaic cables, and comprises an outer sheath layer, a heat insulation layer is arranged in the outer sheath layer, an armor layer is arranged in the heat insulation layer, the armor layer comprises a first armor sleeve and a second armor sleeve, and the first armor sleeve and the second armor sleeve are arranged in the outer sheath layer. The second armoring sleeve is located in the first armoring sleeve, a plurality of outer hollow holes distributed at intervals are formed in the outer wall of the first armoring sleeve, a plurality of inner hollow holes distributed at intervals are formed in the outer wall of the second armoring sleeve, and the inner hollow holes and the outer hollow holes are distributed in a staggered mode. The problems that when an existing photovoltaic cable is used, the cable is reinforced through reinforcing ribs, but due to the fact that the distribution positions of the reinforcing ribs are uneven, the strength of the cable is easily reduced, and the service life of the cable in the outdoor environment is affected are solved.

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.

The application relates to the technical field of cable materials, in particular to a flame-retardant cable sheath material and a preparation method thereof, wherein the flame-retardant cable sheath material comprises the following raw materials in parts by weight: 60-70 parts of polyvinyl chloride, 30-40 parts of butadiene styrene rubber, 8-10 parts of aluminum hydroxide, 5-7 parts of decabromodiphenyl ethane, 7-9 parts of ammonium polyphosphate, 1.5-2.5 parts of a dispersing agent, 1-3 parts of a silane coupling agent, 1-2 parts of a promoter M, 0.5-1.5 parts of a promoter DM, 2-4 parts of stearic acid, 2.5-5 parts of a calcium-zinc stabilizer, 1.6-2.0 parts of zinc oxide and 0.5-1.5 parts of an ultraviolet absorber; the flame-retardant cable sheath material has the advantage of improving the flame-retardant performance of the cable sheath.

This disclosure relates to hydrosilylated (addition) curable silicone rubber compositions, silicone elastomer materials produced by curing said hydrosilylated (addition) curable silicone rubber compositions and having improved high-temperature (175°C) compression set according to ISO 815-1 Method A, and methods for preparing said silicone elastomer materials. This disclosure also extends to the use of such materials.

Performance requirements of electroactive polymer materials used for transducer devices include dielectric breakdown strength, Young's modulus, dielectric constant, thickness, and electromechanical instability. There are correlation relationships therebetween but definitions of the correlation relationships have not been achieved. Therefore, it is necessary to search for an excellent material by trial and error, which requires a great deal of work. Disclosed herein is a curable elastomer composition that includes a compound having a high dielectric functional group. A cured product of the composition satisfies the following formula:E=α⁡(Yε0⁢εr)0.5where E is the dielectric breakdown strength in the range of 50 V / μm to 200 V / μm, α is a constant in the range of 0.4 to 0.9, Y is Young's modulus and is in the range of 0.001 MPa to 10 MPa, εγ is a specific dielectric constant and is 100 or less, and ε0 represents the dielectric constant of vacuum.

The present invention relates to an insulating device comprising an insulating body consisting of a hollow tube or solid cylinder made of ceramic or composite material and an unvulcanized extruded HCR / HTV silicone shielding shell. The present invention further relates to the use of a novel vulcanization method for crosslinking the addition-curing silicone elastomer used. According to the invention, infrared heat emitters (Fig. 2) are used for this vulcanization method, arranged radially at a defined distance around the rotating insulating device. The method comprises (a) providing an insulating body, (b) applying an adhesion promoter (primer) to the insulating body, (c) extruding the silicone profile onto the primed insulating body, (d) repairing and finishing the unvulcanized HTV silicone shielding shell, and (e) vulcanization with infrared heat emitters having a multi-stage temperature profile.The multi-stage vulcanization process prevents the formation of bubbles and foam in the silicone structure, which are detrimental to the electrical properties. In the first stage, reaction gases can diffuse through the not yet fully vulcanized silicone surface. In the second temperature stage, the silicone is completely vulcanized. The silicone material must be chemically adjusted to this process in terms of its reactivity (vulcanization curve). Unlike convection heat in conventional autoclave or oven processes, infrared heat radiation penetrates deep into the material, resulting in excellent adhesion of the silicone to the insulating body. This allows for vulcanization within the silicone volume, preventing bubble formation caused by reaction gases, as these gases can still escape through the open surface.

The invention discloses a silicone rubber composition, silicone rubber and a preparation method and application thereof, the silicone rubber composition comprises modified white carbon black and modified aluminum hydroxide, and the modified white carbon black and the modified aluminum hydroxide are prepared by modifying white carbon black / aluminum hydroxide with active silanol and alcohol steam. The invention also provides the silicone rubber prepared from the composition. The silicone rubber is prepared by adopting a step-by-step internal mixing and kneading method. Compared with a conventional silicone rubber composition, the silicone rubber composition disclosed by the invention adopts the modified white carbon black and the modified aluminum hydroxide, under the promotion action of the modified white carbon black and the modified aluminum hydroxide, the structural compactness of the silicone rubber can be effectively improved, and the porosity can be remarkably reduced; the uniform distribution of the product can be realized, the porosity can be further reduced, and the silicone rubber material which is uniform in filler dispersion, high in surface integrity and low in porosity can be prepared.

The invention discloses a preparation process of a low-temperature-resistant and high-temperature-resistant flame-retardant cable. The cable sequentially comprises a conductor, an insulating layer, a belting layer and a sheath layer from inside to outside, the insulating layer is formed by taking hydrogenated nitrile rubber as a matrix and matching with a halogen-free flame retardant, a charring agent and a cross-linking agent; the belting layer is a ceramic silicone rubber-glass fiber cloth composite belt; and the sheath layer is formed by taking a thermoplastic polyurethane elastomer as a matrix and cooperating with an intumescent halogen-free flame retardant. The insulating layer is based on hydrogenated butadiene-acrylonitrile rubber and has a long-term use temperature range of-50 DEG C to 150 DEG C or above. And a high-temperature-resistant formula system is matched, so that the cable can work in an extreme temperature environment for a long time.

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.