564 results about "Magnesium Hydrate" 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.

An extreme-cold resistant low-fume halogen-free flame-retardant polyolefin sheath, a preparation method therefor, and a cable. The sheath comprises the following raw materials in parts by mass: 4-16 parts of an ethylene-vinyl acetate copolymer, 7-13 parts of a phosphate group functionalized linear low-density polyethylene, 9-15 parts of an ethylene-octene copolymer, 5-10 parts of a maleic anhydride-grafted ethylene-methyl methacrylate copolymer, 10-15 parts of magnesium hydroxide, 40-50 parts of aluminum hydroxide, etc. The preparation method for the phosphate group functionalized linear low-density polyethylene comprises: adding a catalyst to a pre-cooled ethylene monomer, adding a vinyl phosphate ester and an initiator after the reaction, and reacting for 1-2 hours at a temperature of 65-75°C and a pressure of 15-35 Mpa and then terminating the reaction, thereby obtaining the phosphate group functionalized linear low-density polyethylene. Compared with unfunctionalized polyethylene, the phosphate group functionalized polyethylene used has greatly improved low-temperature and flame-retardant performance, and can improve the overall flame-retardant and low-temperature performance of the formula.

The invention discloses a preparation method of high-performance cordierite DPF honeycomb ceramic, and belongs to the technical field of honeycomb ceramic carrier preparation. The preparation method comprises the following steps: mixing raw materials; kneading mud; performing extrusion molding; drying and shaping; cutting and firing to obtain a cordierite honeycomb ceramic carrier; and performing boundary dimension processing, film covering, hole dotting, mud scraping and drying to obtain a finished product. According to the invention, aluminum hydroxide is adopted to replace or partially replace aluminum oxide in the formula of the cordierite porous ceramic structure while magnesium hydroxide is used, and the two substances can form a synergistic heat absorption mechanism by virtue of the difference of the aluminum hydroxide and magnesium hydroxide in thermal decomposition temperature, so that the heat absorption efficiency of the cordierite porous ceramic structure is greatly improved in the low-temperature coke discharge stage of a carrier mud blank. Aluminum hydroxide is subjected to a decomposition reaction before magnesium hydroxide, and then magnesium hydroxide is continuously decomposed at a higher temperature, so that the temperature range covered by the whole heat absorption process is greatly widened, the heating rate of the carrier mud blank is effectively slowed down, and thermal shock caused by sudden rising of local temperature is avoided.

The invention provides a ternary synergistic flame retardant suitable for a polylactic acid composite material and a preparation method thereof. The ternary synergistic flame retardant comprises ternary components of magnesium hydroxide, zinc oxide and titanium dioxide, the ternary component is subjected to surface modification through a silane coupling agent solution containing an epoxy group, the mass ratio of magnesium hydroxide to zinc oxide to titanium dioxide is 4: 1.5: 1-5: 2: 1, and the ternary component is used for maintaining the mechanical property of polylactic acid and achieving the synergistic effect of flame retardance and smoke suppression at the same time. According to the polylactic acid composite material prepared by the invention, the limit oxygen index is increased to 28.85% from 19.91%, the increase amplitude is about 45%, and the UL-94 V-0 grade is reached; the maximum smoke density is reduced from 287 to 198, the reduction amplitude is about 31%, and the flame retardant efficiency of the material and the visibility in the combustion process are remarkably improved. The addition amount of the ternary synergistic flame retardant is controlled in a range of 15-25%, an excellent flame retardant effect can be obtained, the addition amount is greatly reduced compared with that of a single magnesium hydroxide system (generally, the addition amount needs to be larger than or equal to 40%), and the mechanical property loss caused by high filling is effectively avoided.

The invention belongs to the technical field of inorganic chemical material preparation, and discloses a high-selectivity crystallization and impurity migration inhibition method of high-purity magnesium hydroxide. The method comprises the following steps: a phenylphosphonic acid surface modifier is introduced in the initial stage of crystallization, molecules of the phenylphosphonic acid surface modifier selectively occupy high-activity Mg < 2 + > sites of a magnesium hydroxide crystal face through bidentate coordination, and a molecular-level interface barrier with steric hindrance and electrostatic repulsion effects is formed, so that a Ca < 2 + > migration path is specifically blocked, and Mg < 2 + > crystallization is not influenced. The preparation method of the high-purity magnesium hydroxide is high in selectivity, high in efficiency, low in cost and environmentally friendly, the interface adsorption behavior of calcium ions is accurately intervened in the initial stage of crystallization through a molecular level surface engineering means, the technical bottleneck that impurity migration and lattice doping are difficult to control in a traditional process is fundamentally solved, and the preparation method is suitable for industrial production. And a brand new technical path is provided for green manufacturing of high-performance inorganic functional materials.

The invention discloses a high-temperature-resistant flame-retardant wire harness and a preparation method thereof, and relates to the technical field of electric harnesses. The method comprises the following steps: firstly, introducing phosphorus and silicon flame-retardant elements on a polyethylene molecular chain through plasma activation and free radical grafting reaction to prepare phosphorus-silicon grafted modified polyethylene, then compounding aminated silicon dioxide and organic intercalated montmorillonite by using isophorone diisocyanate as a bridging agent to prepare the phosphorus-silicon grafted modified polyethylene composite material. The preparation method comprises the following steps: preparing an isocyanate-bridged silicon dioxide-montmorillonite composite filler to improve the dispersity and compatibility of the filler in a matrix, carrying out extrusion granulation on modified polyethylene, an ethylene-butyl acrylate copolymer, maleic anhydride grafted polyethylene, the composite filler, nano magnesium hydroxide and other additives to prepare polyethylene wire harness particles, and finally, carrying out extrusion granulation on the polyethylene wire harness particles to prepare the cable harness. And coating the surface of a copper core wire with the particles through a single-screw extrusion coating machine, and carrying out subsequent water cooling, steam treatment, drying and rolling to obtain a finished wire harness. The wire harness prepared by the invention has excellent high temperature resistance and flame retardance.

The invention provides a halogen-free flame-retardant polyolefin cable sheath material composition, a sheath material and a production method. The halogen-free flame-retardant polyolefin cable sheath material composition comprises a polyolefin resin matrix, a silane coupling agent, an inorganic flame retardant and silica, wherein the inorganic flame retardant comprises aluminum hydroxide and magnesium hydroxide. In the application, the silica and decomposition products of the aluminum hydroxide and the magnesium hydroxide can form a compact ceramic layer at high temperature, and the ceramic layer can stably exist in a humid and hot environment for a long time, and can effectively block the permeation of moisture, reduce the erosion of moisture to a base material and improve the moisture aging resistance of the sheath material.

The invention relates to the technical field of power cables, and provides a flame-retardant power cable and a preparation method thereof. The flame-retardant power cable comprises a conductor, an insulating layer and a sheath layer which are sequentially arranged from inside to outside, and the sheath layer is prepared from, by weight, 40-60 parts of polyethylene, 60-80 parts of ethylene-vinyl acetate copolymer, 8-10 parts of compatilizer, 3-5 parts of auxiliaries, 15-20 parts of filler and 60-70 parts of flame retardant. The flame retardant is prepared from magnesium hydroxide, antimony trioxide, hydrated zinc borate and an aromatic bromine-containing compound in a mass ratio of 45: 8: 12: (25-30), and the number of bromine atoms of the aromatic bromine-containing compound is 6-8. According to the technical scheme, the problem of insufficient flame retardant property of the power cable in the prior art is solved.

The invention relates to the technical field of seed coating materials, and discloses a wheat and rice seed coating material and a coating process. The wheat and rice seed coating material comprises micron iron powder, nano calcium phosphate, nano magnesium hydroxide and a binder, the addition amounts of the micron iron powder, the nano calcium phosphate and the nano magnesium hydroxide respectively account for 10%-20%, 2%-10% and 3%-10% of the total weight of the seeds; the binder is at least one of a polyvinyl alcohol colloidal solution, a carboxymethyl cellulose colloidal solution and a hydroxypropyl methyl cellulose colloidal solution. The invention also provides a coating process of the wheat and rice seed coating material. The coating material disclosed by the invention not only can protect seeds, but also can efficiently adsorb and fix heavy metal ions of lead, cadmium and arsenic after the micron iron powder, the nano calcium phosphate and the nano magnesium hydroxide are slowly released in soil, so that integrated prevention and control from'seeds' to'rhizosphere 'is realized.

The invention relates to the technical field of cables, and provides a fireproof flame-retardant cable and a preparation method thereof. The fireproof flame-retardant cable comprises a conductor, an insulating layer and a sheath layer which are sequentially arranged from inside to outside, and the sheath layer is prepared from, by weight, 40-50 parts of high-density polyethylene, 30-40 parts of ethylene-vinyl acetate copolymer, 30-40 parts of flame retardant, 15-20 parts of filler, 8-10 parts of plasticizer, 2-4 parts of lubricant, 2-4 parts of antioxidant, 2-3 parts of stabilizer and 2-3 parts of cross-linking agent; the flame retardant is prepared from the following component raw materials in parts by weight: 30 to 40 parts of magnesium hydroxide, 10 to 15 parts of aluminum hydroxide, 4 to 5 parts of zinc borate, 3 to 4 parts of diethyl phosphoryl ethyl triethoxy silane and 1 to 1.5 parts of 2-(2-pyridyl) ethyl trimethoxy silane. According to the technical scheme, the problem of insufficient fireproof and flame-retardant performance of the cable in the prior art is solved.

The invention relates to the technical field of polymer composite materials, in particular to a cable polymer composite material for a wind turbine blade, which is prepared from the following raw materials in parts by weight: a polymer base material; a reinforcing material; a polymer modified material; a functional additive; a performance modifier; the functional additive is prepared from an anti-ultraviolet agent, an antioxidant, a silane coupling agent and nano titanium dioxide. According to the invention, the epoxy modified polyether-ether-ketone and bisphenol A epoxy resin compounded base material is matched with a continuous glass fiber, carbon fiber chopped strand and nano silicon nitride multi-element reinforcing system, so that the core short board of insufficient mechanical properties of the traditional material is thoroughly solved, and a magnesium hydroxide, aluminum hydroxide, expanded graphite and nano montmorillonite compounded flame-retardant system is also selected, so that the flame-retardant performance of the material is greatly improved. The flame-retardant cable material is high in flame retardance, free of toxic gas release, capable of meeting the environment-friendly requirement, capable of improving the material interface bonding force and long-term service reliability and capable of meeting the requirement for the service life of 20 years or above of wind power blade cables.

The invention discloses a polyamide cable material as well as a preparation method and application thereof. The cable material is prepared from the following raw materials in parts by weight: 100 parts of polyamide, 10 to 40 parts of nano magnesium hydroxide whisker, 1 to 5 parts of silane coupling agent, 1 to 5 parts of amphiphilic block copolymer, 1 to 10 parts of pentaerythritol triacrylate and 1 to 5 parts of antioxidant, wherein the fiber length of the nano magnesium hydroxide whisker is 200 to 1000 nm, and the fiber diameter of the nano magnesium hydroxide whisker is 30 to 80 nm. The polyamide cable material has good temperature resistance (can tolerate the high temperature of 135 DEG C for a long time), flame retardance (the limit oxygen index can reach 31% or above, preferably 33.5%), mechanical properties (excellent tensile strength and low-temperature impact resistance) and relatively high volume resistivity.

The invention discloses a recycled PP composite material with flame-retardant and antibacterial properties and a preparation method thereof, and relates to the technical field of recycled PP composite materials. The recycled PP composite material with flame-retardant and antibacterial properties is prepared from the following raw materials in parts by weight: 60 to 75 parts of recycled PP, 15 to 25 parts of modified magnesium hydroxide, 3 to 8 parts of modified chitosan, 2 to 5 parts of ethylene-vinyl acetate copolymer, 0.5 to 1.5 parts of silane coupling agent KH-550, 8 to 15 parts of ammonium polyphosphate, 0.3 to 0.8 part of calcium stearate, 1 to 3 parts of nano titanium dioxide and 0.2 to 0.6 part of tributyl citrate. The recycled PP composite material has the remarkable advantages that the recycled PP is used as a base material, so that the environment is protected and the cost is low; through compounding of modified magnesium hydroxide, modified chitosan and the like, the flame-retardant antibacterial coating has excellent flame-retardant and antibacterial properties; the preparation process is clear and controllable, the raw material compatibility is scientific, the compatibility of the components is good, the product performance is stable, and the application prospect is wide.

The invention belongs to the field of preparation of high-end carbon materials, and relates to a method for desulfurizing high-sulfur petroleum coke. The core of the invention is to construct a'desulfurization-acidification-regeneration 'three-step closed cycle system. The system takes magnesium oxide as a circulating medium, firstly magnesium oxide reacts with sulfur in petroleum coke at a high temperature to be converted into magnesium sulfide, then sulfur is released and recovered through an acidification step, meanwhile magnesium is converted into an intermediate product magnesium hydroxide, and finally, the magnesium medium is recovered to be active through a thermal regeneration step, magnesium oxide is obtained, and circulation is completed.

A heat-resistant insulated PVC material for communication cables comprises the following components and parts by weight: polyvinyl chloride 45-55; stabilizer 5-10; plasticizer 15-25; nitrile oxide 3-8; aluminum hydroxide 10-15; magnesium hydroxide 20-30; smoke suppressant 1-5; skin coupling agent 1-3; IPPP 10-20. The product obtained by this invention is lightweight, has good physical and mechanical properties, excellent mechanical balance, superior flame retardancy, good thermal stability, and no dripping.

The invention provides a high-strength fire-resistant cable and a preparation method thereof, and belongs to the technical field of cables, and the preparation method of the high-strength fire-resistant cable comprises the following steps: reacting nano-hydroxyapatite with 10-(2-methacryloyloxy) monodecyl phosphate in ethanol, and drying to obtain modified hydroxyapatite; ethylene-vinyl acetate copolymer, magnesium hydroxide, zinc borate, zinc stannate, polyethylene wax, vinyltrimethoxysilane, 2-hydroxy-2-methyl propiophenone and modified hydroxyapatite are mixed, melt-extruded and illuminated at constant temperature, and a sheath layer is obtained; mixing tetraethoxysilane, ethanol, dibutyltin dilaurate, fumed silica, phlogopite paper and glass fibers, heating and aging, and cutting to obtain a fireproof layer; the insulating layer, the fireproof layer and the sheath layer are sequentially coated on the conductor to prepare the high-strength fireproof cable, and the cable prepared by the invention has good mechanical property, electrical insulating property and fireproof property.

The utility model discloses a diesel generator flue gas purification mechanism for civil air defence engineering, including air inlet pipe and purification bin, the air inlet pipe one end is linked with diesel generator exhaust pipe in civil air defence engineering power generation room intercommunication, the other end of air inlet pipe is inserted into the purification bin and the opening direction is perpendicular to downward, the open end position of air inlet pipe in the purification bin is connected with the shunt joint, each interface of shunt joint all is connected with the jet pipe that the air hole of pipe body lateral wall is evenly set up, the utility model relates to civil air defence engineering technical field, utilize liquid supply booster pump and press into the spray subassembly in alkaline solution (15% magnesium hydroxide compound agent), and further via spray subassembly to the spray of filler layer, make the nitrogen monoxide, nitrogen dioxide, sulfur dioxide and particulate matter etc. in tail gas contact with the alkaline water mist in purification bin and filler layer, to the purification treatment of nitrogen monoxide, nitrogen dioxide, sulfur dioxide and particulate matter.

The application relates to a modified chrome-corundum ramming mixture and a preparation and construction process, and belongs to the technical field of chrome-corundum ramming mixtures. The ramming mixture comprises A material, B material and C material, the A material comprises chrome-corundum aggregates, titanium dioxide-coated alumina microspheres, calcium sulfide dihydrate and porous silicon carbide microspheres; the B material comprises chromium oxide-zirconium oxide composite nano powder, sodium thiosulfate pentahydrate, tricalcium phosphate and hexagonal boron nitride flaky crystals; and the C material comprises an aluminum dihydrogen phosphate-magnesium hydroxide compound, a calcium fluoride-alumina eutectic body and a silane coupling agent. The preparation process comprises pretreatment of components, preparation of composite powder and layered preparation; and the construction process comprises the steps of pretreatment, wet mixing, layered ramming, negative pressure infiltration, medium-temperature reaction, spraying and curing and overall sintering. The application can effectively inhibit the generation of hexavalent chromium, significantly improve the thermal shock resistance, mechanical strength and heat conduction performance of the material, and has the advantages of good environmental protection, long service life, excellent construction performance and the like.

This application relates to the field of cable materials, specifically disclosing a low-smoke, low-halogen polyvinyl chloride (PVC) cable material and its preparation method. The material includes the following raw materials: polyvinyl chloride resin, EVM500 rubber, heat stabilizer, antioxidant, plasticizer, lubricant, filler, flame retardant, flame retardant synergist, and acrylate processing aids. The flame retardant includes a mixture of aluminum hydroxide and magnesium hydroxide, and the flame retardant synergist includes a zinc borate and ammonium octamolate-sepiolite composite. The preparation method includes the following steps: mixing the raw materials according to a specified ratio, then melting and mixing them, followed by granulation and extrusion molding to obtain the low-smoke, low-halogen PVC cable material. This application alleviates the problem of traditional PVC cable materials producing large amounts of black smoke and toxic gases during combustion, reduces smoke density, and improves the material's environmental performance and flame retardant properties.

The invention relates to the technical field of polyethylene film materials, in particular to a weather-resistant flame-retardant PE composite film and a preparation method thereof.The preparation method comprises the following steps that S1, a PE-based copolymer, an antioxidant and a light stabilizer are mixed and then discharged; s2, mixing LDPE resin, magnesium hydroxide, a silane coupling agent and zinc stearate, and discharging; s3, the outer-layer mixture and the core-layer mixture are put into a double-screw extruder for melt extrusion granulation and drying, and outer-layer master batches and core-layer master batches are obtained; and S4, respectively putting the outer-layer master batch and the core-layer master batch into an extruder for extrusion, and carrying out three-layer co-extrusion casting film forming, cooling shaping and rolling to obtain the weather-resistant flame-retardant PE composite film. The weather-resistant flame-retardant PE composite film obtained by the preparation method disclosed by the invention has relatively good weather resistance and flame retardance.

A production device for producing modified magnesium hydroxide without coarse particles comprises a semi-finished product bin (1), a first spiral reamer (2), a modification main machine (3), a cooling machine (4), an airflow powder screening machine (5), a pulse cloth bag collector (6), an induced draft fan (7), a second spiral reamer (8), a packaging machine (9), a modifier feeding port (10), a base (11), a stirring blade (12), a dust removal cloth bag (13) and a discharging port switch (14). According to the device disclosed by the utility model, the modification main machine and the airflow powder screening machine are arranged in a matched manner, the modification main machine solves the problem of modification temperature, and the airflow powder screening machine solves the problem of powder screening; the modified superfine magnesium hydroxide finished product is good in dispersing performance, free of agglomeration and excellent in flame retardant property and mechanical property; and airflow powder screening is not prone to blockage, high in screening efficiency and large in yield. The device is suitable for producing modified magnesium hydroxide without coarse particles.

The invention provides a low-smoke halogen-free high-flame-retardant power cable and a preparation method thereof, and the low-smoke halogen-free high-flame-retardant power cable comprises a conductor, an insulating layer and a sheath layer. The sheath layer is prepared from the following raw materials: 25 to 40 parts of ethylene-vinyl acetate copolymer, 15 to 25 parts of linear low-density polyethylene, 5 to 15 parts of metallocene polyethylene, 8 to 15 parts of reactive phosphorus-nitrogen-silicon hybrid compatibilizer, 12 to 22 parts of low-temperature sintered ceramic composite powder, 30 to 45 parts of surface-treated magnesium hydroxide, 15 to 25 parts of surface-treated aluminum hydroxide, 3 to 6 parts of organic modified montmorillonite and 1.5 to 2.5 parts of triallyl isocyanurate. 1.0 to 2.0 parts of a composite antioxidant, 1.0 to 2.5 parts of a calcium-zinc stabilizer and 0.5 to 1.5 parts of silicone master batch. The prepared low-smoke halogen-free high-flame-retardant power cable has excellent flexibility, mechanical property, heat resistance and processability, is stable in flame retardant property and stable in size, and is suitable for safety protection of power cables.

The invention discloses an anti-seismic and fireproof bus duct with anti-displacement capability and a manufacturing process thereof, and the anti-seismic and fireproof bus duct with anti-displacement capability comprises a housing body and a filling layer. The shell body is prepared from the following components in parts by mass: 55 to 65 parts of low-carbon steel, 3 to 5 parts of nano silicon carbide, 2 to 4 parts of titanium alloy powder, 6 to 8 parts of glass fiber, 4 to 6 parts of epoxy resin and 0.5 to 1 part of antioxidant; the filling layer is prepared from 25 to 30 parts of expanded vermiculite, 8 to 12 parts of magnesium hydroxide, 5 to 8 parts of graphene modified phenolic resin, 3 to 5 parts of elastic polyurethane particles and 0.8 to 1.2 parts of a silane coupling agent; according to the invention, the anti-displacement capability is excellent, the shell hardness is enhanced through the nano silicon carbide, the toughness is improved through the titanium alloy powder, and the buffer effect of the elastic polyurethane particles is matched, so that the displacement amount of the bus duct under earthquake and temperature change can be effectively inhibited, and the displacement amount is small and far lower than that of an existing product.

The present invention relates to a method for recovering valuable materials from waste. The method for recovering valuable materials from waste comprises the steps of: (a) pulverizing waste, which is generated from an evaporator or a crystallizer among equipment of a zero liquid discharge process for desulfurization wastewater, and then injecting same into a dissolution tank so as to dissolve same in a solvent and separating same into a gypsum (CaSO4) precipitate and a supernatant from which the gypsum has been removed; (b) dissolving, in a desulfurization tank, barium chloride (BaCl2) in the supernatant from which the gypsum has been removed, and separating same into a barium sulfate (BaSO4) precipitate and a supernatant from which the barium sulfate has been removed; (c) dissolving, in a hydroxide tank, sodium hydroxide (NaOH) in the supernatant from which the barium sulfate has been removed, and separating same into a magnesium hydroxide (Mg(OH)2 precipitate and a supernatant from which the magnesium hydroxide has been removed; and (d) injecting, into a salt pond, the supernatant from which the magnesium hydroxide has been removed, so as to recover sodium chloride (NaOH).

The invention provides a high-strength, high-temperature-resistant and flame-retardant cable sheath material. The high-strength, high-temperature-resistant and flame-retardant cable sheath material is prepared from the following raw material components in parts by weight: 40-70 parts of matrix resin, 10-30 parts of reinforced fibers, 15-30 parts of a flame retardant, 5-15 parts of an anti-ant agent, 2-8 parts of a compatibilizer, 0.5-5 parts of a processing aid and 2-4 parts of color master batch. The matrix resin comprises at least one of polyamide-imide resin, polyether-ether-ketone or polyurethane resin. The reinforced fibers comprise amino modified carbon fibers and aramid fibers, and the mass ratio of the amino modified carbon fibers to the aramid fibers is 1: (1-3). The flame retardant comprises nano magnesium hydroxide and aluminum hypophosphite, and the mass ratio of the nano magnesium hydroxide to the aluminum hypophosphite is (2: 1)-(3: 1). The invention discloses a cable protection sleeve, and aims to solve the common problems that an existing cable protection sleeve is prone to embrittlement or deformation in extreme weather such as freezing rain and high temperature, novel materials are high in manufacturing cost and difficult to be put into large-scale commercial use, and meanwhile, termites and rodents damage cables.

The invention relates to the technical field of high-voltage cables, in particular to a crosslinked polyethylene insulated high-voltage direct-current cable, which is characterized in that an insulating layer contains a crosslinked polyethylene base material, a composite modifier, an antioxidant compound system, a nano nucleating agent, a tracking-resistant agent, a compatilizer and a smoke suppressant, the composite modifier is prepared by compounding an ethylene-vinyl acetate copolymer and a methyl methacrylate-butadiene-styrene copolymer, the antioxidant is prepared by compounding hindered phenol and phosphite ester, the nano nucleating agent is prepared from silane coupling agent KH-550 modified talcum powder and calcium carbonate, the tracking-resistant agent is prepared from melamine cyanurate and stearic acid activated magnesium hydroxide, and the lubricant is prepared from a lubricant and a lubricant. The compatilizer is maleic anhydride grafted polyethylene, and the smoke suppressant is compounded by ammonium molybdate and tin oxide. The components synergistically improve the flexibility, aging resistance and dielectric property of the insulating layer, the tracking resistance and smoke suppression are balanced, and the preparation process solves the problem of additive agglomeration, accurately controls the crosslinking degree, reduces the internal stress and improves the performance uniformity.

A structured powder for capturing CO2 from a gas stream includes an agglomerated powder, wherein magnesium hydroxide is 5 wt % to 90 wt % of the powder, and particles of the powder have a mean diameter of 1 micron to 40 microns. The structured powder has a mean largest dimension of 1 mm to 250 mm and an internal porosity of 10 vol % to 50 vol %.

This invention relates to the field of power cable technology and discloses a wear-resistant modified PE sheathed power cable with a braided reinforcement layer. From the inside out, the invention comprises a conductor, an insulation layer, a filler layer, a metal shielding layer, an inner sheath layer, a buffer layer, an armor layer, a double-gradient braided layer, and an outer sheath layer. The buffer layer is filled with nano-magnesium hydroxide particles and hollow glass microspheres to enhance buffering energy absorption and flame retardant performance, resisting external impacts and fire risks. The double-gradient braided layer uses a blended fiber design to enhance tensile strength and dynamic friction reduction, adapting to dragging and stretching conditions. The outer sheath layer, with its helical interlocking structure and graphene molybdenum disulfide modified ridge surface, enhances wear resistance and load-bearing capacity, resisting wear in complex environments. The synergistic effect of each functional layer comprehensively improves the overall performance of the cable.

The invention provides a flame-retardant polyethylene master batch filled with magnesium hydroxide and a preparation method of the flame-retardant polyethylene master batch, and relates to the field of flame-retardant materials. The flame-retardant polyethylene master batch filled with magnesium hydroxide comprises the following raw materials in parts by mass: 8-20 parts of linear low-density polyethylene, 3-6 parts of an ethylene-octylene copolymer, 60-80 parts of modified magnesium hydroxide powder, 8-12 parts of montmorillonite powder, 3-5 parts of zinc borate, 2-5 parts of graphite powder, 1-4 parts of a lubricant, 4-8 parts of a coupling agent, 2-4 parts of barium stearate and 0.5-2 parts of an antioxidant. Compared with a common polyethylene material, the flame-retardant polyethylene master batch filled with magnesium hydroxide prepared by the invention has higher flame retardance, smoke suppression and carbon forming properties, also improves the dripping resistance of the polyethylene material, and can be used for preparing products such as polyethylene wires and cables, polyethylene foam boards, polyethylene pipes and the like.

The application belongs to the field of polyester fibers, and particularly relates to a flame-retardant polyester fabric, and a preparation method thereof, which comprises the following steps: uniformly mixing 80-100 parts of PET polyester chips, 5-15 parts of ionic liquid modified magnesium hydroxide and 1-5 parts of an antioxidant, and then performing blending extrusion through a double-screw extruder, drawing and cutting to obtain flame-retardant modified polyester masterbatch; then uniformly mixing 70-90 parts of PET polyester chips and 10-30 parts of the flame-retardant modified polyester masterbatch, and performing melt spinning on a double-screw high-speed composite spinning machine to obtain flame-retardant polyester fibers. The prepared polyester fibers have excellent flame-retardant performance and mechanical properties.