102results about How to "Insulate from heat" patented technology

The invention relates to the field of polyolefin plastics, in particular to a glass fiber reinforced modified polyolefin plastic and a preparation method thereof, which are used for solving the problem that the application of the existing glass fiber reinforced modified polyolefin plastic in some high-performance fields is limited due to poor mechanical strength and flame-retardant and fireproof performance of the existing glass fiber reinforced modified polyolefin plastic. According to the preparation method, the organic phosphorus-nitrogen modified glass fiber is added into the polyolefin resin to serve as a reinforcing agent, so that the polyolefin plastic not only is obviously improved in mechanical property, but also can keep relatively good performance in a high-temperature environment, and the flame retardant property and the fireproof grade are obviously improved; and the fireproof door can meet the fireproof standard with higher requirements. Meanwhile, according to the preparation method, a reasonable production process and technical means are adopted, and good combination of the glass fiber and the polyolefin material is ensured, so that comprehensive optimization of the plastic performance is realized, the performance and the application range of the polyolefin plastic are remarkably improved, and the requirement of high-performance application under various complex environmental conditions is met.

The invention relates to the field of aviation brake airplane wheels, in particular to a novel single-web type airplane brake main airplane wheel which comprises a brake assembly and an airplane wheel assembly which are arranged on an undercarriage shaft, and the airplane wheel assembly and the brake assembly are installed on the undercarriage shaft together to form the single-web type airplane brake main airplane wheel. A first heat dissipation channel is formed between the outer ring of the heat reservoir assembly and the inner wall of an outer cylinder of the hub assembly, a second heat dissipation channel is formed between the inner ring of the brake shell assembly and the outer wall of an inner cylinder of the hub assembly, and the second heat dissipation channel communicates with a through hole formed in the end face of the brake shell assembly. Air flow output by the cooling fan assembly in the air collection cavity brings heat of the heat reservoir assembly out of the brake assembly through heat dissipation holes, a first heat dissipation channel and a second heat dissipation channel which are formed in the hub web. Radiation heat of the heat reservoir assembly can be dissipated into the atmosphere on the outer side of the aircraft wheel, and the cooling efficiency of the cooling fan on the heat reservoir assembly is greatly improved.

The invention discloses a composite metal roof system and a construction method thereof. The construction method comprises the following steps that firstly, a roof truss supporting structure is constructed, wherein the roof truss supporting structure is welded to the top of a main body structure; and secondly, a main purline, a secondary purline, a bottom plate layer, a sound absorption layer, a supporting layer, a vapor barrier layer, a heat preservation layer and a waterproof layer are sequentially constructed on the top of the roof truss supporting structure and located around the daylighting roof structure to be constructed, an inner connecting keel is arranged on the inner side of the heat preservation layer in the annular direction, and an outer connecting keel is arranged on the outer side of the heat preservation layer in the annular direction. And thirdly, skylight keels are constructed. And 4, constructing an inner drainage ditch, an outer drainage ditch and a radial drainage ditch. And 5, constructing a fixed glass window and an openable glass window. And 6, the waterproof layer and the facing layer are sequentially constructed until the construction is finished. The technical problems that a traditional steel truss roof structure is complex in construction process, leakage risks exist, and heat preservation and sound insulation performance is poor are solved.

The invention discloses a low-smoke-density high-temperature-resistant halogen-free special flame-retardant optical cable, which comprises a cable core, an inner sheath and a fireproof layer from inside to outside, and is characterized in that the fireproof layer comprises a fireproof layer made of a ceramic silicone rubber material; the cable core comprises optical fibers, a loose tube, a reinforcing piece and an internal flame-retardant thermal insulation layer, the reinforcing piece is located in the center of the cable core, the optical fibers are arranged in the loose tube to form an optical fiber unit and surround the reinforcing piece, the internal flame-retardant thermal insulation layer comprises water-blocking yarn and a calcined mica tape, and the space between the optical fiber unit and the reinforcing piece is filled with the water-blocking yarn. And the optical fiber units, the reinforcers and the water-blocking yarns are wound by the calcined mica tape in a multi-layer and multi-pitch manner. According to the invention, the ceramic silicone rubber material is adopted and is ceramized in a flame state or at a high temperature of more than 500 DEG C to form an oxygen barrier layer, so that a flashover phenomenon in the cable is prevented; ointment is removed from the structure, and the water-blocking yarn and the calcined mica tape are used for blocking water, so that smoke in the combustion process is reduced, and the harm to personnel is less under the condition of fire hazard.

The invention relates to the field of high polymer materials, and provides a preparation method and application of composite halogen-free high-phosphorus-content flame-retardant polyester aiming at the problems of non-uniform component dispersion and poor anti-dripping effect of the composite flame-retardant polyester. The preparation method comprises the following steps: mixing dihydric alcohol, terephthalic acid, a catalyst, esterification liquid of the reaction type phosphorus flame retardant and the reaction type nitrogen flame retardant, sequentially carrying out esterification reaction and polycondensation reaction to obtain a melt, and treating the melt to obtain the composite halogen-free high-phosphorus-content flame-retardant polyester. The invention also provides application of the flame-retardant polyester. According to the invention, the reactive phosphorus flame retardant participates in the polyester polymerization process, so that the influence on the molecular regularity of polyester is small, and the crystallization behavior and post-processing performance of slices are not influenced; the apparent viscosity of the polyester is improved by the modified nitrogen flame retardant, the polycondensation time is greatly shortened, and the polyester with lasting flame-retardant effect and good anti-dripping effect is obtained by compounding multiple halogen-free flame retardants.

The invention discloses a reinforced and toughened composite polyethylene material for plastic pipe processing and a preparation method thereof, and belongs to the technical field of polyethylene material processing. The low-density polyethylene composite material comprises the following components in parts by weight: 90-100 parts of low-density polyethylene, 8-12 parts of glycidyl methacrylate, 5-6 parts of a flame retardant, 15-22 parts of a composite filler, 20-30 parts of a reinforced elastomer, 0.5-0.8 part of an initiator and 3-5 parts of an auxiliary additive, a low-density polyethylene matrix is reinforced by a strong elastomer, a composite filler, a flame retardant and glycidyl methacrylate, so that the tensile property and impact toughness of the composite polyethylene material are effectively improved, and the flame retardance and aging resistance of the material are also improved.

The invention relates to the technical field of new materials, and discloses a flame-retardant functionalized carbon nanotube modified polyethylene material, which is characterized in that organic functional groups and starch macromolecules are introduced to the surfaces of carbon nanotubes, so that the intermolecular distance of the carbon nanotubes is increased, the agglomeration phenomenon of the carbon nanotubes is inhibited, and the flame-retardant functionalized carbon nanotube modified polyethylene material is prepared. According to the present invention, the carbon nano-tubes are introduced into the polyethylene, such that the carbon nano-tubes can be easily dispersed, the carbon nano-tubes can provide the good mechanical property enhancing effect on the polyethylene, the phosphorus element is introduced on the surfaces of the carbon nano-tubes, the starch having the excellent char forming property is introduced, and the flame-retardant phosphoric acid, the flame-retardant polyphosphoric acid and the like can be formed during combustion so as to promote the char forming of the starch and the polyethylene; according to the present invention, the carbon layer with the barrier property is rapidly formed, and the barrier carbon layer can isolate oxygen and heat so as to prevent the further combustion of the polyethylene material, such that the flame retardation self-extinguishing effect is provided so as to obtain the polyethylene material with characteristics of good flame retardation and good mechanical property.

The invention discloses a preparation method of a cement-based artificial lawn blanket, and belongs to the technical field of greening engineering. According to the preparation method, the cement-based artificial lawn blanket comprises three-dimensional mesh cloth, simulated green plants, a cement-based composite material and a packaging layer; the simulated green plant comprises a green leaf part and a grass root part; the preparation method comprises the following steps: S01, preparing the three-dimensional mesh cloth; s02, preparing simulated green plants from low-density polyethylene flame retardant resin, and arranging the simulated green plants in the three-dimensional mesh cloth; s03, pouring a cement-based composite material into the three-dimensional mesh cloth; s04, spraying a packaging layer on the bottom of the three-dimensional mesh cloth; wherein in the step S02, linear low-density polyethylene is used as a matrix for preparing the low-density polyethylene flame retardant resin, and the low-density polyethylene flame retardant resin comprises a composite flame-retardant material composed of an electrodeless flame-retardant material and an organic flame-retardant material. According to the cement-based artificial lawn carpet obtained through the preparation method of the cement-based artificial lawn carpet, simulated green plants are good in flame retardance, and the outdoor color is stable.

The invention provides a high-heat-resistance copper-clad plate and a preparation process thereof, and belongs to the technical field of copper-clad plates. The preparation process comprises the following steps: pretreating the polyimide film; preparing a mixed glue solution; preparing a prepreg; and hot-pressing and curing. The preparation method comprises the following steps: carrying out a reaction on m-diacetylene benzene, methyl phenyl dichlorosilane and the like used as raw materials to prepare a silicon-containing resin, and carrying out a reaction on isosorbide bis (terephthalate), bisphenol A and dibenzoate used as raw materials under the catalysis of 4-dimethylaminopyridine to prepare a modifier. When the modifier is used for modifying the silicon-containing resin to prepare the modified silicon-containing resin, as the modifier can improve the thermal conductivity of the silicon-containing resin, facilitate uniform distribution of heat and further improve the heat resistance of the silicon-containing resin, after the modified silicon-containing resin is added into a modified glue solution, the heat resistance of the modified glue solution can be effectively improved, and the service life of the modified glue solution is prolonged. Therefore, the effect of improving the heat resistance of the copper-clad plate is achieved.

The invention belongs to the technical field of PET (polyethylene terephthalate) film materials, and particularly discloses a PET heat-sealing film for blocking infrared rays and ultraviolet rays as well as a preparation method and application of the PET heat-sealing film. The PET heat-sealing film provided by the invention is of a multi-layer film structure and comprises a near-infrared and ultraviolet absorption layer, a transparent layer and a heat-sealing layer, wherein the near-infrared absorption layer and the ultraviolet absorption layer have an absorption effect on near-infrared rays and ultraviolet rays, so that the transmission of invisible light can be reduced, and the blocking effect of the film on radiation can be improved; the transparent layer takes optical-grade transparent PET as a preparation raw material, so that the transparency of the film can be improved, the stiffness of the film can be increased, and the winding effect can be improved; the heat sealing layer can endow the film with self-adhesion, so that the film can be directly compounded with glass at a high temperature, and the use of an adhesive is avoided. In addition, the preparation process of the PET heat-sealing film is simple, the operability is high, industrial production is easy to perform, and the PET heat-sealing film has good application prospects and high economic value.

The invention relates to the technical field of water storage equipment, and discloses an afforestation water storage and drought resisting device for arid region forestry engineering, the afforestation water storage and drought resisting device comprises a storage mechanism and a collecting mechanism mounted at the upper end of the storage mechanism, the storage mechanism comprises two supporting frames, and the two supporting frames are rotatably connected through a hinge; one side, far away from the hinge, of each supporting frame is provided with a lock catch, the two supporting frames are jointly combined into an annular structure and erected on the periphery of a tree, the two supporting frames are jointly combined into an annular structure and arranged on the periphery of the tree in a sleeving mode, and the device is provided with a plurality of outer water storage barrels which are buried in soil; according to the device, heat is isolated, evaporation of water is reduced, the multiple outer water storage barrels are annularly arranged at the roots of the trees, the roots of the trees can be irrigated intensively and rapidly, evaporation of water is further reduced, and the utilization rate of water resources in the desert area is increased.

The invention belongs to the technical field of cables, and provides a high-temperature-resistant low-smoke halogen-free flame-retardant twisted-pair cable for a building security system and a preparation method thereof. Magnesium hydroxide is modified by adopting a sol-gel method, and the surface of the magnesium hydroxide is coated with silicon dioxide, so that the magnesium hydroxide has excellent hydration effect and free radical capture capability at high temperature, and the flame retardance and smoke suppression performance are improved; secondly, on the basis of alkaline lignin, through chemical modification of phosphonitrilic chloride trimer and triphenyl phosphate, a phosphorus-nitrogen structure and a phosphate group are introduced, the thermal stability and carbonization capacity of lignin are remarkably enhanced under the catalytic action of titanium dioxide, and a compact carbonization protection layer is formed to block oxygen and heat. The two flame-retardant materials are respectively fused and mixed to finally obtain the low-smoke halogen-free flame-retardant cable. The cable material has excellent flame retardance and low smoke emission performance, and is suitable for building security and protection systems with high safety requirements.

The present application relates to the field of flame-retardant cables, and specifically discloses a halogen-free flame-retardant rubber cable material and a preparation method thereof. A preparation method of a halogen-free flame-retardant rubber cable material comprises: S1, ionization treatment: polyurethane liquid rubber, polyamide liquid rubber and xylene are mixed, stirred evenly to form a slurry, and then the slurry is placed in an ionization device for ionization treatment under the action of an electric field; S2, infrared light irradiation treatment: after the ionized raw materials are mixed evenly with a dispersant, a lubricant and an antioxidant, they are placed in an infrared radiation device for infrared light irradiation treatment at 60-80°C; S3, mixing reaction; S4, vulcanization treatment; S5, melt hot pressing. The cable material prepared by the preparation method of the present application effectively improves the mechanical strength of the cable material while ensuring a good flame retardant effect.

The invention provides a method for performing flame-retardant finishing on a copper ammonia fabric by using a barley bran extract, the flame-retardant finishing method is as follows: a core-shell structure flame retardant is loaded to the surface of the copper ammonia fabric through a padding process, the core-shell structure flame retardant takes polyguanidine and sodium alginate as a shell layer and takes the barley bran extract as a core layer, and the core layer is a shell layer; the polyguanidine and the sodium alginate are combined through self-assembly. The barley bran used in the invention is a by-product of barley processing, efficient utilization of resources is realized through processing of the barley bran, use of halogen in a traditional flame retardant is avoided, and the method has the characteristic of environmental friendliness.

The present invention relates to a halogen-free flame-retardant TPU composite material and a preparation method thereof, and belongs to the technical field of polymer materials. The halogen-free flame-retardant TPU composite material comprises, by weight, 3-10 parts of a modified flame retardant, 2-10 parts of phenoxy cyclophosphazene, 80-100 parts of TPU particles, 90 parts of N,N-dimethylformamide, 0.8-1.2 parts of an ultraviolet absorber, and 2.5-3.5 parts of a lubricant; in the modified flame retardant, ammonium polyphosphate is heated to polyphosphoric acid, which is heat-insulating and flame-retardant, improves the comprehensive performance of the material, and the quaternary ammonium salt structure and the carbamate bond synergistically enhance the flame retardant and heat-resistant performance of the material; in the ultraviolet absorber, cyanuric chloride and benzotriazole intermediates absorb ultraviolet rays, reduce the damage of ultraviolet rays to the material, and enhance aging resistance and toughness; the halogen-free flame-retardant TPU composite material prepared by the present invention not only has good flame retardant and heat-resistant effects, but also has excellent anti-ultraviolet performance.

The invention discloses a medical silica gel sealing ring material and a preparation method thereof, and relates to the field of silica gel materials. When the medical silica gel sealing ring material is prepared, mica powder, phytic acid, diglycidyl ether and allyl glycidyl ether are uniformly mixed and react to obtain modified mica powder; the preparation method comprises the following steps: reacting 4-(2-aminoethyl) phenylboronic acid with 3, 3 '-dihydroxy-[1, 1'-biphenyl]-4, 4 '-diformaldehyde to obtain a graft; the preparation method comprises the following steps: reacting vinyl silicone oil, thioglycerol and methacryloylethyl sulfobetaine to obtain modified silica gel; uniformly mixing the modified silica gel, the modified mica powder and the graft, and reacting to obtain the medical silica gel sealing ring material. The medical silica gel sealing ring material prepared by the invention has excellent flame-retardant, anti-aging, antifouling and mechanical properties.

The invention relates to the technical field of thermal transfer carbon ribbons, and discloses a high-efficiency thermal transfer carbon ribbon back coating adhesive and a preparation method thereof. Tetrakis(hydroxymethyl)phosphonium chloride, vinyl trichlorosilane and 2,5-bis(trifluoromethyl)terephthalic acid are used as raw materials to synthesize a diene fluorine-containing caged siloxane monomer, and the monomer is polymerized with pentaerythritol tetraacrylate to form a cross-linked organic silicon acrylic copolymer with a hyperbranched cross-linked network structure, which replaces a traditional organic silicon resin mixture. The copolymer is diluted with a single solvent toluene to avoid the use of a multi-component mixed solvent, greatly reduces VOC emissions, and can be recycled. The carbon ribbon back coating adhesive prepared by the invention has good heat resistance and wear resistance, smooth printing, good bonding performance, can enhance heat conduction and lubrication in a printing process, effectively eliminates the risk of static electricity generated in an actual application process, has a good flame retardant effect, and avoids safety hazards.

The invention discloses an anti-aging and anti-electromagnetic shielding cable and a preparation method thereof, and belongs to the field of high voltage and the technical field of materials, the anti-aging and anti-electromagnetic shielding cable structurally contains a polyurethane-polyethylene copolymer and a flame-retardant and anti-electromagnetic sheet composite carrier, contains a polyurethane chain segment which is connected with a polyethylene main chain through a covalent bond, has no interface separation risk, and has good anti-aging and anti-electromagnetic shielding effects. Polyethylene is resistant to acid, alkali and salt mist, a carbamate group in a polyurethane chain segment can capture free radicals generated by photooxidation and thermal oxidation of polyethylene, aging is delayed from the molecular level, and the flame-retardant anti-electromagnetic sheet composite carrier endows the cable with good aging resistance and anti-electromagnetic shielding characteristics; the lamellar structure of the sheet-shaped carrier can block heat transfer and combustible volatilization, and the lamellar structure and the sheet-shaped carrier synergistically improve the flame-retardant efficiency; the introduction of the flaky composite carrier not only endows functional characteristics, but also can be used as a rigid reinforcement phase, so that the wear resistance and the extrusion resistance of the cable are improved, and the loss of the cable in the dragging and construction processes is reduced.

The utility model discloses an anti-volatilization ethyl alcohol storage tank, and relates to the technical field of storage devices, the anti-volatilization ethyl alcohol storage tank comprises a tank body and a storage mechanism, the storage mechanism is arranged on the outer side of the tank body, through the arrangement of the storage mechanism, during use, an inner tank can isolate heat, ethyl alcohol is prevented from being heated and volatilized, and a one-way breather valve can keep pressure balance of the inner tank; the sealing cover and the rubber pad can prevent leakage or pollution of ethanol; the sealing buckle can prevent the sealing cover from loosening or falling off; the pressure meter and the liquid level meter can measure the pressure and the liquid level of the inner tank, so that the change of the pressure and the liquid level of the ethanol can be known in time; the anti-explosion ethanol sensor can detect the concentration of the ethanol; the sealed communication reminder can remind an operator or surrounding personnel to take corresponding measures and prevent ethanol explosion through wireless signals, the ground wire can lead static electricity of the storage tank to the ground, static electricity accumulation is prevented, and potential safety hazards are reduced.

The utility model discloses a novel cold compress facial mask assembly which can meet the butt joint of a facial mask body and protective cloth, can independently replace the facial mask body or the protective cloth, can visually and effectively feed back the temperature condition of the facial mask body, can effectively fit the face of a patient, and improves the cold compress effect. According to the technical scheme, the mask is characterized by comprising a mask body and protective cloth, the mask body comprises a first butt joint face and a display face, the protective cloth comprises a second butt joint face and a skin-friendly face, the first butt joint face is detachably connected with the second butt joint face through an adhesion structure, and a plurality of temperature sensing parts used for detecting and feeding back temperature are arranged on the display face. The protective cloth can effectively isolate heat on the face of the patient, so that the sanitary condition of the face of the patient is protected, and the treated part is prevented from being over-stimulated or infected; according to the cold compress mask, medical staff can visually and clearly know the temperature condition of the mask body, so that the cold compress effect on a patient is maintained by replacing the mask body, and the patient is helped to recover more quickly.

This invention provides a low-density flame-retardant thermally conductive foam powder filler, composed of the following components in parts by weight: 200-300 parts of boron nitride (80-100 micrometers); 200-300 parts of hollow glass microspheres (50-70 micrometers); 200-300 parts of aluminum hydroxide (8-10 micrometers); 200-300 parts of aluminum hydroxide (1-2 micrometers); and 2-4 parts of coupling agent. Its advantages are: 1. Low density: By introducing low-density hollow glass microspheres, the overall density of the filler is effectively reduced, meeting lightweight design requirements. 2. High thermal conductivity: The compound boron nitride forms a highly efficient thermal conductivity network. 3. Excellent flame-retardant performance: The halogen-free flame retardant aluminum hydroxide works synergistically with the hollow glass microspheres. The hollow glass microspheres form a glassy barrier at high temperatures, isolating oxygen and heat, achieving excellent flame-retardant effects. 4. Good dispersibility and compatibility: By modifying the powder surface with silane coupling agent, a "molecular bridge" is formed between the inorganic powder and the organic polymer matrix, which significantly reduces agglomeration, lowers the interfacial thermal resistance, and significantly reduces the viscosity of the system.

This invention discloses a novel in-situ solid electrolyte and its preparation method, comprising: mixing precursor A and precursor B, and carrying out a hydrolysis-condensation reaction under the action of a catalyst to obtain a POSS-based curing agent with R1 and R2 groups; in an inert environment, sequentially mixing the POSS-based curing agent, a double lithium salt, an organic solvent, and an initiator to obtain a precursor liquid; injecting the precursor liquid into a battery casing and allowing it to stand and soak, so that the precursor solution can fully penetrate the electrode pores; heating the battery after liquid injection at 45-80°C for 4-24 hours to initiate the polymerization and cross-linking of the R2 groups to form a three-dimensional network, and the R1 groups undergo microscopic phase separation to repel the electrolyte phase, constructing ion transport channels in the POSS cross-linked network, while the POSS framework adsorbs and fixes anions, thus forming a solid electrolyte in situ; improving the rate performance of the battery and effectively eliminating the risk of lithium dendrite precipitation under low-temperature fast charging conditions.

The invention discloses a polypropylene composite material with weather resistance and flame retardancy and a preparation method thereof, and belongs to the field of thermoplastic high molecular polymer materials. The invention comprises the following steps: a benzyl-containing hindered phenol antioxidant, bromine and a free radical initiator react to obtain a brominated hindered phenol antioxidant; the brominated hindered phenol antioxidant reacts with an amino-terminated organosiloxane to obtain a hindered phenol-organosiloxane; hindered phenol-organosiloxane, a carbon-carbon double bond-terminated organosiloxane and an organic weak acid react to obtain a carbon-carbon double bond-terminated hindered phenol-organosiloxane; hindered phenol-organosiloxane and propylene are polymerized under the action of a composite catalyst to obtain a polypropylene composite material. The invention directly introduces a functional group with flame retardancy and antioxidant properties into the main chain of polypropylene by covalent crosslinking during the preparation process of polypropylene, and then polymerizes to obtain a polypropylene composite material with weather resistance and flame retardancy.

This invention discloses a heat- and impact-resistant protective conduit for MPP cables and its preparation method, relating to the field of polymer materials technology. The components, by weight, include: 20-22 parts of a toughening dispersion made from anhydrous ethanol and terminally epoxy-terminated hyperbranched polysiloxane; 33-35 parts of a boron-nitrogen co-doped carbon dot made from citric acid, boric acid, and urea, first compounded with phytic acid and piperazine, then compounded with modified zirconium phosphate prepared by hexadecyltrimethylammonium bromide intercalation, and then modified with silane coupling agent KH-560 to form a flame retardant synergist; 12-14 parts of polyolefin elastomer; 2-2.5 parts of magnesium aluminum hydrotalcite; 0.2-0.24 parts of antioxidant; 0.2-0.3 parts of calcium stearate; 0.2-0.3 parts of polyethylene wax; and 100-120 parts of polypropylene. The introduction of the flame retardant synergist and other raw materials in this invention effectively improves flame retardancy, aging resistance, impact resistance, low-temperature resistance, and heat resistance.

The utility model discloses a paver cable, which comprises a cabling formed by twisting a plurality of cable cores, an inner sheath, a shielding layer, an outer sheath and a heat insulation layer, each cable core comprises a conductor and an insulating layer, and the insulating layer is formed by extruding high-temperature-resistant and extremely soft platinum silicone rubber. The inner sheath is extruded on the outer side of the cable, the shielding layer is woven on the outer side of the inner sheath, the outer sheath is extruded on the outer side of the shielding layer, and the heat insulation layer comprises a quartz wire woven layer and a fluorosilicone resin paint coating. Quartz wires have high-temperature-resistant and heat-insulating capabilities, and fluorosilicone resin paint has heat-insulating and heat-reflecting capabilities, so that the heat-insulating capability of the cable is improved by combining the quartz wires and the fluorosilicone resin paint. The problems that an existing paver cable is prone to aging and embrittlement, and a conductor is fractured are solved.

The invention provides a flame-retardant antistatic nylon fiber with a skin-core structure and a preparation method of the flame-retardant antistatic nylon fiber, and belongs to the technical field of nylon fibers. The flame-retardant antistatic nylon fiber comprises an antistatic nylon skin layer and a flame-retardant nylon core layer, the outer surface of the flame-retardant nylon core layer is coated with the antistatic nylon skin layer, the antistatic nylon skin layer comprises a nylon 6 matrix and an antistatic agent, and the antistatic agent is aniline modified zirconium phosphate; wherein the aniline modified zirconium phosphate is obtained by carrying out in-situ polymerization on aniline monomers between stripped zirconium phosphate layers. The flame-retardant antistatic nylon fiber is obtained through sheath-core composite melt spinning. According to the invention, the antistatic agent and the flame retardant are efficiently and stably introduced into the nylon matrix, and the synergistic effect of the antistatic agent and the flame retardant is realized, so that the fiber has better spinnability and mechanical property, and meanwhile, the long-term effect and durability of the function are ensured.

The present invention provides a flame retardant material containing bauxite and a preparation method thereof, and relates to the technical field of flame retardant materials. The flame retardant material containing bauxite of the present invention is prepared from the following raw materials in parts by weight: 25-30 parts of epoxy resin, 8-10 parts of modified sepiolite, 12-16 parts of bauxite, 12-16 parts of attapulgite-nano silicon carbide composite, 6-8 parts of curing agent, 0.5-1 parts of dispersant, 10-12 parts of hexaphenoxy cyclotriphosphazene, 6-10 parts of ammonium polyphosphate, 5-7 parts of starch, 3-5 parts of melamine, and 20-25 parts of water. The flame retardant material containing bauxite of the present invention improves the flame retardant performance, high temperature resistance and adhesion ability of the material by optimizing its composition and ratio, which is helpful to promote the technological progress and industrial upgrading of the fireproof material industry, and provides strong support for protecting the safety of life and property.

The present invention relates to the field of degradable materials, and provides a biodegradable plastic product reinforcement material and a preparation method thereof, which is made of the following raw materials: polylactic acid modified by a shelled flame retardant polymer, a dandelion-shaped flame retardant, starch, a plasticizer, microcrystalline cellulose, polyhydroxybutyrate, an antioxidant, and a dispersant. Preparation method: First, the polylactic acid modified by a shelled flame retardant polymer, the dandelion-shaped flame retardant, the dispersant and the plasticizer are uniformly mixed by a melt blending method; then, starch, microcrystalline cellulose, antioxidant and polyhydroxybutyrate are added; finally, the obtained mixture is introduced into an extrusion film blowing machine, and is formed by hot melt extrusion blow molding technology. The core-shell structure flame retardant polymer and the dandelion-shaped flame retardant of the present invention have excellent flame retardancy, mechanical properties and environmentally friendly degradation characteristics. Therefore, the biodegradable plastic product reinforcement material of the present invention has excellent mechanical properties and flame retardancy, and has a wide range of application value.

This utility model discloses a flat, fire-resistant, silicone rubber flame-retardant cable, relating to the field of cable technology. It includes a cable core composed of multiple sets of parallel-distributed wire cores, each core comprising a conductor, an insulation layer, and a shielding layer. A fire-resistant layer, a flame-retardant layer, and an outer sheath are sequentially disposed outside the cable core. The fire-resistant layer consists of a hardened inner layer and a high-temperature resistant outer layer. The hardened inner layer is a ceramicized silicone rubber layer, and the high-temperature resistant outer layer is a mica tape wrapping layer. The flame-retardant layer consists of a buffer layer and a flame-retardant outer coating layer. The buffer layer is aluminum hydroxide-filled silicone rubber, and the flame-retardant outer coating is an intumescent flame-retardant coating. This solution solves the problems of unstable cable operation in high-temperature environments and performance degradation in complex environments.

The utility model relates to the technical field of charging, in particular to an aluminum melting furnace reciprocating type charging trolley which comprises a moving trolley and a charging assembly. The feeding assembly comprises a hopper, a mounting frame, a first hydraulic cylinder, a pushing mechanism, two mounting bases, a baffle and two second hydraulic cylinders. The two second hydraulic cylinders are started, the two second hydraulic cylinders can drive the baffle to rotate upwards by 90 degrees, in the using process, the baffle blocks an outlet of the hopper, materials are added into the hopper, the moving trolley is started, the hopper is driven to move to the side edge of the aluminum melting furnace, then the first hydraulic cylinder is started, the hopper is pushed to stretch into the aluminum melting furnace, and then the two second hydraulic cylinders are started; and finally, the material pushing mechanism is started, and the materials in the hopper are pushed into the aluminum melting furnace. By the adoption of the mode, when the movable trolley drives the hopper to move to the side edge of the aluminum melting furnace, the outlet of the hopper is blocked by the baffle, and therefore materials in the hopper can be prevented from being scattered out in the moving process.