2729 results about "Fire retardant" patented technology

A long-term fire retarding biochemical liquid composition including: a dispersing agent realized in the form of a major amount of water, for dispersing alkali metal ions dissolved in the water; a major amount of a first fire retarding agent realized in the form of a primary alkali metal salt of a nonpolymeric saturated carboxylic acid, for example, tripotassium citrate, for providing metal potassium ions dispersed in the water when the at least one alkali metal salt is dissolved in the water to form a mixed retardant solution; a minor amount of a second fire retarding agent realized in the form of a secondary alkali metal salt of a nonpolymeric saturated carboxylic acid, for example, potassium, sodium, calcium and / or magnesium benzoate, for providing benzoate ions dispersed in the water when the secondary alkali metal salt is dissolved in the mixed retardant solution, for functioning as a secondary fire retardant agent.

The invention belongs to the field of plastic product production, and particularly relates to a composite material for preparing a textile dyeing tube. The composite material mainly comprises the following components in parts by weight: 10 parts of PET resin, 10 parts of ASA resin, 1-6 parts of matt master batches, 1-3 parts of titanium dioxide, 1-2 parts of rosin, 0-1.5 parts of an antioxidant, 0-1 part of a fire retardant and 1-2 parts of a lubricating agent, wherein titanium dioxide is rutile titanium dioxide. Compared with the prior art, the components are good in compatibility; the molded product has excellent physical and mechanical properties, low glossiness, high strength (caused by titanium dioxide) and good tenacity, and is suitable for injection molding of plastic products; the metallic luster caused by titanium dioxide can be reduced; the noise can be reduced; titanium dioxide can be used for disinfecting under irradiation of an ultraviolet lamp; the composite material is very convenient; and the lubricating agent is added, so that the surface is relatively smooth.

The invention relates to the technical field of chlorinated polyvinyl chloride plastics, in particular to a PVC corrosion-resistant cable protection pipe and a preparation process thereof. The invention aims to solve the problem that the mechanical property and the corrosion resistance of the existing PVC cable protection pipe cannot be considered at the same time. Chlorinated polyvinyl chloride and polyvinyl chloride are subjected to hot mixing to obtain matrix resin, and the corrosion-resistant additive, the composite flame retardant, the flexibilizer and other additives are added to obtain the cable protection tube. The corrosion-resistant additive is obtained by grafting and modifying nano silicon dioxide with epoxy resin and premixing with an ethylene-vinyl alcohol copolymer; the composite flame retardant comprises core layers of nitrogen series, phosphorus series and inorganic hydroxides and a shell layer of an acrylate polymer, and is obtained through a core-shell reaction; the cable protection pipe is prepared through a multi-step mixing process; by introducing the core-shell structure and the corrosion-resistant auxiliary agent, efficient flame retardance and corrosion resistance are achieved, stress is buffered through the flexible shell layer, and the mechanical property of the material is maintained.

The invention discloses a silica gel pad with high thermal conductivity and heat resistance and a preparation method thereof, and the method comprises the following steps: preparing a composite thermal conductive filler, mixing boron nitride nanosheets and graphene according to a certain mass ratio, adding a silane coupling agent, carrying out ball milling, adding spherical alumina, and mixing; preparing modified organic silicon resin, wherein methyl vinyl silicone rubber, hydrogen-containing silicone oil, a platinum catalyst and MQ silicon resin react to obtain the modified organic silicon resin; mixing and defoaming the modified organic silicon resin, the composite heat-conducting filler, the flame retardant and the antioxidant to obtain a heat-conducting silica gel mixture; preparing a reinforced base material, carrying out plasma treatment on glass fiber cloth, and then impregnating the glass fiber cloth with vinyl ester resin for pre-curing; and grinding the mixture by three rollers, coating the mixture on a reinforced base material, and heating and curing. The thermal conductivity of the obtained silica gel pad is 2.5-3.5 W / m.K, the volume resistivity is larger than 1012 omega.cm, the long-term heat-resistant temperature reaches 200 DEG C or above, the tensile strength is larger than 5 MPa, the peel strength is larger than 15 N / cm, and the silica gel pad has excellent thermal conductivity, insulativity, heat resistance and mechanical strength.

The invention provides a high-hydrophobicity anti-pollution flashover coating and a preparation method thereof, and relates to the field of coatings. The silicone rubber composition is prepared from the following raw materials in parts by weight: 80 to 100 parts of hydroxyl-terminated polydimethylsiloxane; 5 to 15 parts of modified nano silicon dioxide; 10 to 30 parts of a composite self-repairing microcapsule; 10 to 25 parts of a flame retardant; 3-8 parts of a cross-linking agent; 0.5-2 parts of a catalyst; 1-5 parts of an accelerant; 40 to 100 parts of a solvent; the modified nano silicon dioxide is fumed silica subjected to surface treatment by a fluorine-containing silane coupling agent and a platinum catalyst; the capsule wall of the composite self-repairing microcapsule is a polylactic acid-glycolic acid copolymer, and the capsule core of the composite self-repairing microcapsule is a mixed solution of a hydroxyl-terminated polydimethylsiloxane oligomer and methyltris (methylethylketoximino) silane. The coating has excellent hydrophobicity, weather resistance and targeted repair function.

The invention belongs to the field of flame-retardant finishing of textiles, and discloses a phytic acid-based flame retardant and a preparation method of a flame-retardant cotton fabric. Natural phytic acid, polyethylene glycol, melamine and metal salt are used as main raw materials, the environment-friendly characteristic of a biomass material is combined, an efficient and environment-friendly flame retardant is prepared, the prepared flame retardant is arranged on a cotton fabric through a traditional impregnation method, and the flame retardance and smoke suppression performance of the arranged cotton fabric are greatly improved. The method not only has a good flame retardant effect, but also avoids potential hazards of a traditional flame retardant to the environment and human health, and has a wide application prospect. The flame-retardant cotton fabric can be widely applied to the fields of household textiles, protective clothing, fire-fighting equipment and the like, and has remarkable economic benefits and social benefits. The invention not only provides an efficient and environment-friendly flame retardant preparation method, but also opens up a new way for application of biomass materials in the field of flame retardance, and has important scientific significance and practical value.

Disclosed in the present invention are a reinforced polyurethane rigid foam material and a preparation method therefor, belonging to the technical field of high polymer materials. The material comprises: 5-10 parts of glass fiber yarn, 40-60 parts of an aromatic polyether polyol, 30-50 parts of an aromatic polyester polyol, 30-50 parts of toluene diisocyanate, 40-60 parts of polymethylene polyphenyl polyisocyanate, 5-10 parts of a flame retardant, 5-15 parts of a foaming agent, 1-5 parts of a catalyst and 1-5 parts of a surfactant. The present invention can achieve continuous production of the reinforced polyurethane rigid foam material and can improve the tensile property of the material by 20% or above and increase the utilization rate of glass fibers by 5% or above. The reinforced polyurethane rigid foam material can be widely applied to the field of liquefied gas storage and transportation.

The invention provides a sidewalk antiskid terrace material and a construction process thereof, and belongs to the technical field of terrace material manufacturing. The sidewalk antiskid terrace material is prepared from the following components: epoxy resin, polysiloxane elastic resin, fluorocarbon resin, modified covalent organic framework nanosheets, boron nitride nanotubes, nano silicon nitride particles, nano silicon dioxide, nano zinc oxide, a modified flame retardant, attapulgite, a curing agent, an accelerant, a flatting agent, a coupling agent and a dispersing agent. According to the sidewalk antiskid terrace material, various high-performance resins are compounded with the nano filler to form a coating with a compact and uniform structure, so that the mechanical strength and wear resistance of the terrace are remarkably improved. In addition, due to the application of the modified flame retardant, the floor has a good flame-retardant effect, and the safety is improved. The whole formula and the construction process are scientific and reasonable, strong adhesion of the coating is ensured, construction is simple and convenient, curing is sufficient, and the coating is suitable for long-term use of outdoor sidewalks and has attractive appearance and practicability.

The high-performance insulation blanket comprises a surface layer, an EVA adhesive layer and a surface layer which are sequentially arranged, and the surface layer and the EVA adhesive layer are attached in a calendering mode; the surface layer is prepared from the following raw materials in parts by weight: 45 to 55 parts of ethylene-vinyl acetate copolymer, 10 to 20 parts of natural rubber, 8 to 18 parts of PA6 short fiber, 7 to 10 parts of dopamine modified mica powder, 6 to 10 parts of MAH-g-EVA, 10 to 15 parts of flame retardant, 0.2 to 0.4 part of antioxidant, 0.8 to 1.2 parts of lubricant and 2 to 4 parts of coloring agent. In the surface layer formula system, under the synergistic effect of the natural rubber, the PA6 short fiber and the dopamine modified mica powder, the tear resistance and puncture resistance of the material are greatly improved, and meanwhile, the material has excellent comprehensive properties such as high temperature resistance, insulation, flame retardance and aging resistance, and is suitable for the field of high-requirement insulation protection.

The invention relates to the technical field of crosslinked polyethylene insulated power cables, in particular to a flame-retardant and insulated low-voltage power cable and a preparation method and application thereof. The flame-retardant and insulating low-voltage power cable comprises the inner core layer, the filler layer, the belting layer, the lining layer, the metal armor layer and the outer sheath layer from inside to outside, and the multiple layers can effectively protect the inner core and endow the cable with better performance; in addition, low-density polyethylene, a furan modified polyethylene compatilizer, a reactive flame retardant, bismaleimide, dicumyl peroxide and an auxiliary are adopted to obtain the cross-linked polyethylene material for the cable outer sheath, and the cross-linked polyethylene material has excellent insulation, flame retardance, strength, toughness and repairing performance.

The invention discloses a corrosion-resistant protective sleeve for an aluminum alloy cable and a preparation method of the corrosion-resistant protective sleeve, and belongs to the field of cable protective sleeves. The corrosion-resistant protective sleeve for the aluminum alloy cable is prepared from the following raw materials in parts by mass: 40 to 50 parts of ethylene propylene diene monomer, 15 to 25 parts of fluorinated silicone rubber, 5 to 10 parts of modified thiolated ethylene-vinyl alcohol copolymer, 8 to 15 parts of metal fluoride nanocrystal, 4 to 8 parts of vulcanizing agent, 3 to 8 parts of plasticizer and 3 to 5 parts of flame retardant. The two rubber matrixes are compounded to form a physical barrier layer to prevent corrosion media and water molecules from permeating, material pores can be filled with the metal fluoride nanocrystals, diffusion channels of the corrosion media are reduced, and hydrophobicity and corrosion resistance are improved through cooperation of the metal fluoride nanocrystals and the fluorinated silicone rubber. The modified thiolated ethylene-vinyl alcohol copolymer can improve the compatibility between rubber matrixes and form coordination with metal ions of the metal fluoride nanocrystals, so that the diffusion path of a corrosive medium is prolonged, and the corrosion of the corrosive medium is synergistically blocked.

The invention provides a high-temperature-resistant corrosion-resistant cable material for a control line and a preparation method of the high-temperature-resistant corrosion-resistant cable material, and belongs to the field of metallocene polyolefin materials. The cable material is prepared from the following chemical raw materials: 45 to 65 parts of maleic anhydride grafted metallocene polyolefin, 5 to 10 parts of maleic anhydride grafted polyolefin elastomer, 3 to 6 parts of epoxy group modified polyhedral oligomeric silsesquioxane, 2 to 5 parts of polyether amine, 5 to 10 parts of ion response type core-shell structure sustained release microspheres, 8 to 15 parts of multi-dimensional reinforcement, 15 to 25 parts of halogen-free flame retardant, 0.5 to 1.5 parts of antioxidant and 0.5 to 1.5 parts of processing aid. The chemical raw materials with specific functions are accurately selected, a synergistic effect system is constructed, and meanwhile, the high temperature resistance and corrosion resistance of the cable material for the control line are improved.

The invention discloses a flame-retardant thermoplastic polyurethane elastomer material and a preparation method thereof, and belongs to the technical field of modified nano materials. The preparation method comprises the following steps: dissolving melamine, phytic acid and boron nitride in deionized water, carrying out oil bath, adding a coupling agent, stirring, carrying out vacuum filtration, washing with water, and drying to obtain a layered nano flame retardant; the preparation method comprises the following steps: dispersing a flame retardant in deionized water containing a nonionic dispersant, and carrying out ultrasonic treatment; the preparation method comprises the following steps: reacting polyether polyol with diisocyanate to obtain a primary prepolymer; adding other auxiliary agents, stirring, and carrying out gradient heating polymerization; and injecting into a mold, curing for 6-12 hours at 105-125 DEG C, and drying for 12-24 hours at 80-90 DEG C. A phosphorus-nitrogen-silicon ternary synergistic flame-retardant system is introduced, the boron nitride nanosheet surface grafting and dynamic pre-polymerization-gradient heating process is optimized, the dispersity is improved, and smoke suppression and thermal stability are achieved. Compared with the prior art, the flame retardant efficiency is high, the mechanical property is excellent, and environmental friendliness is achieved.

The invention discloses a crosslinked polyethylene low-smoke halogen-free flame-retardant power cable which comprises the following hierarchical structures: a conductor layer; an insulating layer; a shielding layer; the shielding layer takes polyethylene as a matrix and comprises the following components in parts by weight: 70-78 parts of matrix, 20-25 parts of carbon black and 2-5 parts of nano montmorillonite modified lignin, the thickness of the shielding layer is 0.8-1.2 mm, the shielding layer and the insulating layer are molded through a co-extrusion process, and the interface gap is less than or equal to 0.1 mm. The nano montmorillonite modified lignin is adopted as a core flame retardant, the addition amount is reduced by 10%-15% compared with that of a traditional halogen-free flame retardant, by taking a 120 mm civil cable as an example, 18 parts of modified lignin replace 25 parts of a traditional flame retardant with the same flame retardant effect, the raw material cost is reduced by 8%-12%, lignin is derived from agricultural and forestry wastes, dependence on a petroleum-based material is reduced, and the environment-friendly flame-retardant cable material is suitable for industrial production. The gradient cooling process shortens the cooling time by 20%-30% compared with the traditional single-section cold water cooling process, and meanwhile, the pre-crosslinking process reduces the subsequent forming internal stress and reduces the rejection rate.

The invention discloses a high-oxidation-resistance long-life polyethylene cable sheath material and a preparation method thereof, and relates to the technical field of high polymer materials. Comprising the following components: high-molecular-weight high-density polyethylene, surface-modified nano-dioxide, furan-maleimide grafted polyethylene, a Schiff base dynamic cross-linking agent, tea polyphenol grafted polyethylene, a temperature-responsive oxygen-blocking microcapsule, a main antioxidant, an auxiliary antioxidant, an emergency antioxidant, a light stabilizer, a halogen-free flame retardant, a processing aid and an acid absorbent. According to the invention, the main antioxidant, the auxiliary antioxidant and the tea polyphenol grafted polyethylene form a chemically synthesized and naturally modified composite antioxidant system, the designed service life of the material is greatly prolonged, the temperature-responsive oxygen-blocking microcapsule automatically cracks to release the core material when the operating temperature of the cable is greater than or equal to 90 DEG C, a dynamic oxygen-blocking layer is formed, and the service life of the cable is prolonged. The defect that the effect of traditional physical oxygen barrier is attenuated at high temperature is overcome, and the oxygen permeability at high temperature is reduced compared with that of a single nano barrier scheme.

The invention relates to the technical field of phase change energy storage materials, in particular to a phase change wax composite material and a preparation method thereof. The phase change wax composite material is prepared from the following raw materials in parts by mass: 60 to 66 parts of modified paraffin, 4 to 6 parts of elastomer, 20 to 25 parts of modified heat-conducting filler and 6 to 9 parts of flame retardant. Through multi-scale interface design and component function cooperation, the performance bottleneck of a traditional phase change material is broken through, unification of high energy storage density, efficient heat management and long-acting safety is achieved, and the phase change material is particularly suitable for application scenes needing efficient energy storage and heat management.

The invention relates to the technical field of polyolefin cable materials, in particular to a photovoltaic weather-resistant anti-cracking low-smoke halogen-free flame-retardant polyolefin cable material and a preparation method thereof.The photovoltaic weather-resistant anti-cracking low-smoke halogen-free flame-retardant polyolefin cable material is prepared from, by weight, 90-150 parts of polyolefin resin, 1-3 parts of antioxidant, 2-5 parts of ultraviolet light absorber, 30-70 parts of composite flame retardant, 10-25 parts of carbon black and 3-5 parts of cross-linking agent; the composite flame retardant comprises a core material, a first shell material and a second shell material, the core material comprises a halloysite nanotube adsorbed with a flame retardant, the first shell material comprises epoxy resin, and the second shell material comprises maleic anhydride grafted polyethylene. According to the polyolefin cable material provided by the invention, the purpose of efficient flame retardance can be achieved by adding the halloysite nanotubes and the flame retardant system, the interfacial compatibility between the flame retardant and the matrix resin can be improved by adding the maleic anhydride grafted polyethylene, and the flame retardance of the polyolefin cable material can be improved by combining the added halloysite nanotubes and epoxy resin. The purpose of improving weather resistance, stress resistance and crack resistance of matrix resin is achieved.

The invention discloses a cable insulating material which comprises the following components in parts by weight: 40-60 parts of low-density polyethylene, 20-30 parts of an ethylene-vinyl acetate copolymer EVA, 2-5 parts of a composite anti-aging agent, 5-10 parts of a core-shell structure nano composite modifier, 1-2 parts of a lubricant, 3-8 parts of a compatilizer, 20-30 parts of a composite flame retardant, 5-10 parts of a nano reinforcing agent and 2-4 parts of phenylsilane. The core-shell structure modifier strengthens interface bonding, and cooperates with the modified nano reinforcing agent to disperse stress, so that the mechanics and high and low temperature resistance are improved; the composite anti-aging agent inhibits multi-path aging and improves the aging resistance. The material has the advantages of excellent mechanical properties, high and low temperature resistance and outstanding aging resistance, and meets the insulation quality and efficiency requirements of cables in complex use environments.

The invention relates to the field of drag chain cables, in particular to a high-flexibility shielding type drag chain cable and a preparation method thereof. The drag chain cable sequentially comprises a conductor layer, a shielding layer and a sheath layer from inside to outside. The conductor layer is formed by compositely twisting silver-plated copper wires and carbon fibers; the shielding layer comprises an inner shielding layer and an outer shielding layer, the inner shielding layer is wrapped by an aluminum-plastic composite belt, and the outer shielding layer is a tinned copper wire woven mesh. The sheath layer comprises the following components: a modified polyurethane elastomer, an ethylene-vinyl acetate copolymer, nitrile rubber, a composite flame retardant, a plasticizer, an antioxidant, a light stabilizer and a lubricant. Through the structural design of the conductor layer, the shielding layer and the sheath layer and the optimization of the material formula of the sheath layer, the problems that an existing drag chain cable is insufficient in strength and flexibility, limited in shielding effectiveness, poor in wear resistance and weather resistance and difficult to consider both flame retardance and mechanical property are solved.

The invention discloses a phosphorus-nitrogen-silicon synergistic flame retardant containing a POSS (Polyhedral Oligomeric Silsesquioxane) structure and a preparation method of the phosphorus-nitrogen-silicon synergistic flame retardant. The flame retardant integrates three elements of phosphorus, nitrogen and silicon, and can generate a better flame-retardant synergistic effect; meanwhile, the POSS structure and the phenyl structure in the flame retardant endow the flame retardant with good heat resistance and good compatibility with a matrix material polycarbonate (PC), and the flame retardant is suitable for high-temperature processing conditions. In addition, the preparation method of the flame retardant is simple in process, the yield reaches up to 85% or above, and industrial production is easy to achieve.

The invention discloses an efficient flame-retardant waterproof and fireproof coating for a special humid environment and a preparation method, and relates to the technical field of waterproof and fireproof coatings, the waterproof and fireproof coating is prepared from a composite base material, a composite flame retardant, a nano waterproof agent, a moisture-proof auxiliary agent, a functional filler and a mixed auxiliary agent; the adhesive force and flexibility of the coating are synergistically improved through a molecular chain interpenetrating network, dual protection of a super-hydrophobic surface and a compact barrier layer is achieved in combination with a core-shell structure nano waterproof agent, a molecular-level moisture-proof barrier is constructed by adopting dual-intercalation modified bentonite, water vapor permeation can be effectively inhibited, and based on a ternary synergistic flame-retardant system, the flame-retardant performance of the coating is improved. An efficient expanded carbon layer is formed through coating modification and an eutectic structure, the fire endurance of the coating can be remarkably enhanced, in addition, the functional filler strengthens the mechanical property and the flame-retardant synergistic effect through multi-stage structural design and surface modification, the cross-linked network density is optimized in cooperation with gradient polymerization and irradiation curing processes, and the fire endurance of the coating can be remarkably improved. And finally, the bottleneck of performance degradation of the traditional coating in a humid environment is broken through.

The invention discloses a light high-strength fireproof decorative material as well as a preparation method and application thereof, belongs to the technical field of fireproof decorative materials, and aims at solving the technical problem that the fire resistance rating, the water absorption performance and the mechanical strength of a light fireproof material in the prior art need to be further improved. The lightweight concrete is specifically prepared from the following components in parts by weight: 80-100 parts of a silicon-calcium material, 8-10 parts of modified triphosphoric acid, 10-14 parts of a modified fiber reinforcement, 15-18 parts of modified lightweight aggregate, 5-8 parts of an adhesive and 2-3 parts of an additive, the modified triphosphoric acid is used as a flame retardant, the lightweight aggregate is pretreated, the fiber reinforcement is improved, and the lightweight high-strength fireproof decorative material is prepared through mutual cooperation with the additive, so that the fireproof performance and compressive strength of the material are improved, and the volume density of the material is reduced.

The invention relates to the technical field of cables, and provides a medium-voltage power cable and a manufacturing method thereof.The medium-voltage power cable sequentially comprises a conductor, a conductor shielding layer, an insulating layer, an insulating shielding layer, a metal shielding layer, a lining layer, an armor layer and a sheath layer from inside to outside; the sheath layer comprises the following raw material components in parts by weight: 100 parts of polyvinyl chloride, 20-25 parts of a flame retardant, 30-40 parts of a plasticizer, 1-3 parts of an antioxidant and 20-25 parts of an inorganic composite material; the inorganic composite material is obtained by treating white carbon black with lignin and polyethylene glycol dimethacrylate, crushing and carbonizing. According to the technical scheme, the problem that the low temperature resistance of the medium-voltage power cable sheath layer is insufficient in the prior art is solved.

The invention relates to the technical field of fire extinguishing microcapsules, in particular to a high-airtightness perfluorohexanone fire extinguishing microcapsule and a preparation method and application thereof.The perfluorohexanone fire extinguishing microcapsule comprises a composite shell layer and a fire extinguishing core, and the composite shell layer is made of ethylene-vinyl alcohol copolymer resin and silicon dioxide nanoparticles; the fire extinguishing core is a perfluorohexanone fire extinguishing agent and is applied to preparation of indoor fire extinguishing pastes, fireproof coatings and polyurethane adhesive materials. According to the perfluorohexanone fire extinguishing microcapsule disclosed by the invention, the diffusion of low-polarity perfluorohexanone is effectively prevented by utilizing the strong hydrogen-bond interaction between hydroxyl groups in the ethylene-vinyl alcohol copolymer resin, and especially under the condition of relatively high temperature, the perfluorohexanone fire extinguishing microcapsule has a good fire extinguishing effect. The problem that an existing perfluorohexanone fire extinguishing microcapsule is poor in long-term air tightness under the condition of high encapsulation efficiency is effectively solved, and meanwhile harmful substances such as formaldehyde cannot be generated.

The invention discloses a thermal runaway suppression device combining a filling type flame-retardant capsule and battery heat insulation-flame retardance-liquid cooling, belongs to the field of battery safety, and is suitable for thermal runaway management of an energy storage system and an electric vehicle battery pack. The device comprises a filling type flame-retardant capsule, a flame-retardant heat insulation assembly, a liquid cooling assembly, an air cooling system, a monitoring unit and a controller, the filling type flame-retardant capsule is in a folded state before being triggered, is filled with a flame retardant and is provided with a gas production device, and the gas production device is inflated to enable the filling type flame-retardant capsule to expand to fill gaps of a battery pack and physically isolate a high-temperature area; and when the internal gas pressure exceeds a threshold value, the filling type flame-retardant capsule is broken, and the internal flame retardant is released to the surface and gaps of the battery module, so that thermal runaway spreading is delayed. The filling type flame-retardant capsule is introduced, so that a multi-stage protection mechanism of active triggering, gap filling and directional agent release can be formed, and the timeliness and comprehensiveness of thermal runaway inhibition are further improved.

The invention belongs to the technical field of nylon materials, and particularly relates to a high-heat-resistance halogen-free flame-retardant nylon material and a preparation method thereof. According to the invention, PA6 and PA66 base materials are compounded by utilizing the high heat resistance of PA66 and the processability advantage of PA6, and the heat deformation temperature of the material is improved through the synergistic effect of the modified glass fiber reinforcing agent and the antioxidant, so that the heat-resistant requirements of high-end scenes such as new energy automobile battery components and high-temperature electronic components are met. Halogen flame retardants are completely abandoned, the modified halogen-free flame retardant is adopted, the flame retardant effect is achieved, meanwhile, no harmful halogen hydride gas or dioxin is released during combustion, and the material still keeps excellent rigidity and toughness on the basis of high flame retardance and high heat resistance and is suitable for popularization and application. The problem that the mechanical property of a traditional halogen-free flame retardant is reduced due to high addition amount is solved.

The invention relates to a preparation method of a low-smoke halogen-free flame-retardant cable sheath material, and belongs to the technical field of cable materials. The cable sheath material is obtained by self-making a flame retardant and blending the flame retardant with polyethylene, a phosphorus-silicon-boron cross-linked network exists in the flame retardant, a protective layer is formed during combustion, the smoke amount is reduced while flame retardance is achieved, and low-smoke halogen-free flame retardance is achieved through phosphorus-silicon-boron synergy; according to the flame retardant disclosed by the invention, a phosphorus-oxygen group is connected with a silicon-oxygen group through a benzene ring, polarity mutation is buffered, and the flame retardant integrally presents low polarity, so that the compatibility between the flame retardant and a polyethylene matrix is enhanced, the flame retardant is more uniformly distributed in the matrix, the interface bonding is more excellent, and the mechanical property of the material is remarkably improved; and a long-chain siloxane coating structure in the flame retardant can form a water repellent layer on the surface of the material to achieve a hydrophobic effect, so that the dielectric property of the material is not influenced in a humid environment, and the stability and safety of power transmission are ensured.

The invention relates to the technical field of wires and cables, and particularly discloses a mining extrusion-resistant wear-resistant cable with a tensile enhancement layer and a preparation method thereof. The invention relates to a mining extrusion-resistant wear-resistant cable with a tensile enhancement layer. The mining extrusion-resistant wear-resistant cable comprises a wire core conductor, an insulating layer, an inner sheath, the tensile enhancement layer and an outer sheath from inside to outside, the outer sheath and the inner sheath are made of the same raw material; the inner sheath comprises the following raw materials: high-density polyethylene, epoxidized soybean oil, a compound lubricant, a compound wear-resistant filler, a flame retardant, an antioxidant and an ultraviolet light absorber; the compound lubricant is a compound of calcium stearate and oxidized polyethlene wax; the compound wear-resistant filler is a compound of nano polytetrafluoroethylene and silicon carbide. According to the extrusion-resistant and wear-resistant cable for the mine, the tensile strength and the elongation at break can reach 24.9 MPa and 450% to the maximum extent, the wear resistance is 96 mm < 3 > to the minimum extent, and the wear resistance and the pressure resistance of the extrusion-resistant and wear-resistant cable for the mine are improved.

The invention relates to the technical field of cables, and provides a crosslinked polyethylene high-voltage cable which comprises a conductor, an insulating layer and a protective sleeve which are arranged from inside to outside. The protective sleeve comprises the following components in parts by weight: 50-80 parts of high-density polyethylene, 0.5-1 part of a cross-linking agent, 10-20 parts of a composite flame retardant, 0.5-1 part of an antioxidant, 0.5-1 part of a lubricant, 2-3 parts of polyethylene grafted maleic anhydride and 1-2 parts of carbon black. The flame-retardant monomer disclosed by the invention has the beneficial effects that the flame-retardant monomer has phosphorus-nitrogen synergistic flame-retardant and interface enhancing functions. The thiadiazole ring acts with the surface of aluminum hydroxide, so that the dispersity is improved, the mechanical property of the material is enhanced, and the flame-retardant efficiency is improved. The aluminum hydroxide is more efficient in thermal decomposition after being uniformly dispersed, and cooperates with the gas-phase flame-retardant and char-forming effects of the flame-retardant monomer to form a compact protective layer, so that the integration of flame retardance and enhancement is realized. And aluminum hydroxide with good dispersion can also be used as a rigid particle reinforced matrix, so that stress concentration is avoided.

The invention relates to an epoxy resin composite insulating material and a preparation method and application thereof, and belongs to the technical field of insulator equipment. The epoxy resin composite insulating material is prepared from the following raw materials: epoxy resin, nano filler, a surface modifier, aluminum oxide particles, a flame retardant, an organic solvent, a curing agent and an accelerant. The nanofiller is at least one of the following nanoscale materials: titanium dioxide, graphene oxide, carbon nitride, zinc oxide, boron nitride and silicon dioxide; the surface modifier is a silane coupling agent and is used for surface modification of the nano filler; the flame retardant is at least one of a phosphorus flame retardant, a nitrogen-phosphorus synergistic flame retardant and a brominated flame retardant. The insulating material provided by the invention has high thermal stability, high insulativity and carbon precipitation inhibition capability, can effectively inhibit carbon precipitation of epoxy resin under the action of thermal and electric stress, and has good comprehensive performance.