90results about How to "Flame-resistant" patented technology

The invention provides a fire control detection rapid moving robot platform which comprises a main vehicle body and two crawler walking parts. The two crawler walking parts are connected with the two sides of the main vehicle body and each comprise a crawler main frame, a driving wheel assembly, a main steering wheel assembly, two lower steering wheel assemblies, a crawler suspension assembly and a crawler, wherein the driving wheel assembly, the main steering wheel assembly and the lower steering wheel assemblies are all connected with the crawler main frame, lower steering wheel frames of the two lower steering wheel assemblies are connected with the crawler main frame in a pivoting mode and connected with the crawler main frame through shock absorption elements, the number of crawler suspensions is not less than one, main shaking frames of the crawler suspensions are connected with the crawler main frame in a pivoting mode, the main shaking frames are connected with the crawler main frame through buffering elements, the middle of a balancing frame is connected with the lower ends of the main shaking frames in a pivoting mode, belt supporting wheels are installed at the upper ends of the main shaking frames, bearing wheels are installed at the two ends of the balancing frame, and the crawler wraps driving wheels, main steering wheels, lower steering wheels, the belt supporting wheels and the bearing wheels.

The method for making corncob into formed charcoal whose external surface is made into polygonal prismoid for mand its centre has a through hole includes the following steps: pulverizing, screening, drying, forming, carburizing, cooling, taking out from furnace, checking, packaging and putting into storage. Said product has no pollution, can be combusted uniformly and its heating value is high, can be used for roasting food and chafing dish instead of woodcoal, etc.

The invention relates to a polysiloxane and glycidol-containing strong-hydrophobicity gelatin leather finishing agent and a preparation method. The preparation method comprises the following steps: dissolving gelatin in water to prepare aqueous solution with mass concentration of 2-20 percent; adding glycidol into a first reaction flask under the conditions of temperature of 40-70 DEG C and pH of 6-12 to obtain solution 1; adding a surfactant into a second reaction flask, continuously stirring, and meanwhile adding Si-O-Si repetitive unit-containing epoxypolysiloxane in batches or continuously to obtain solution 2, wherein the using amount of the surfactant is 0.5-20 percent of the mass of the gelatin; mixing the solution 1 and the solution 2 in different proportions, weighing 15-20 g of the mixed solution to be placed in a mold of polytetrafluoroethylene, adding 5-10 mL of one or two or three of ethanol, tetrahydrofuran and methanol and drying in a normal pressure drying oven at the temperature of 40-80 DEG C to obtain the gelatin leather finishing agent with a superior function. The finishing agent has the characteristics of strong hydrophobicity, super extensibility, heat resistance, oxidation resistance, wet scrubbing resistance and the like.

The present invention relates to cables suitable for use in plenum applications, which exhibit flame spread and smoke generation properties that comply with industry standards, such as UL 910 or NFPA 262. The cable contains a conductor core that is wrapped with a filament in a spiral pattern along the length of the conductor. A dielectric is then extruded over the filament-wrapped conductor core to provide an insulated cable. To form a coaxial cable, a second conductor can also be provided on the outside of the dielectric and then covered with a jacket. The filament, dielectric, and jacket are preferably made of polyvinyl chloride (PVC).

The invention relates to a method for preparing high molecular weight phenolic resin fibers, comprising the following processing steps of: mixture making, chemical reaction, preparation of phenolic resins, preparation of nascent fibers, preparation of solidifying liquid, solidification reaction, and washing and drying. The method adopts phenol and aldehyde as raw materials which are prepared intothe high molecular weight phenolic resins under the condition of high temperature and high pressure; after melt-spinning, the solidification reaction is performed in the solidifying liquid and the high molecular weight phenolic resin fibers are prepared. The method has the advantages of short reaction time, high curing degree and so on; the high molecular weight phenolic resin fibers prepared by adoption of the method have high mechanical strength via test and are characterized by antiflamming, flame resistance, heat insulation, corrosion resistance and so on; the materials can be used as heat-insulating, insulating and corrosion resistant materials of an aerial aerocraft, as materials of fireproof and corrosion resistant clothes and also as materials of an acid and corrosion resistant filter, and are also raw materials of special fibers such as carbon fibers, graphite fibers, active carbon fibers, ion exchangers and so on.

The invention discloses a rubber and plastic mixture module, which is prepared from the following raw materials in part by weight: 30 to 60 parts of chloroprene rubber, 10 to 25 parts of chlorinated polyethylene, 20 to 40 parts of butadiene styrene rubber, 25 to 35 parts of carbon black, 10 to 25 parts of composite reaction type flame retardant, 30 to 50 parts of phenolic resin, 3 to 8 parts of zinc oxide, 1 to 3 parts of light magnesia, 1 to 3 parts of stearic acid, 1 to 3 parts of vulcanizing agent, 1 to 5 parts of accelerating agent and 8 to 15 parts of liquid flame-retardant softener. The rubber and plastic mixture module serves as a tortoise shell conveyer belt for sintering an outer coating, and has high abrasion resistance, high-temperature resistance, burning resistance and flame combustion resistance, long service life, low cost and relatively low toxicity.

The invention relates to a polysiloxane and quaternary ammonium salt-containing antibacterial gelatin leather finishing agent and a preparation method thereof. The preparation method comprises the following steps: dissolving gelatin in water to prepare aqueous solution with mass concentration of 2-20 percent; adding epoxy quaternary ammonium salt into a first reaction flask under the conditions of temperature of 40-70 DEG C and pH of 6-12 to obtain solution 1; adding a surfactant into a second reaction flask, continuously stirring, and meanwhile adding Si-O-Si repetitive unit-containing epoxypolysiloxane in batches or continuously to obtain solution 2, wherein the using amount of the surfactant is 2-20 percent of the mass of the gelatin; mixing the solution 1 and the solution 2 in different proportions, weighing 15-20 g of the mixed solution to be placed in a mold of polytetrafluoroethylene, adding 5-10 mL of one or two or three of ethanol, tetrahydrofuran and methanol and drying in a normal pressure drying oven at the temperature of 40-80 DEG C to obtain the multifunctional gelatin leather finishing agent. The finishing agent has the characteristics of antibacterial property, adjustable hydrophilia and hydrophobicity, flexible film, strong anti-oxidant capacity and the like.

The invention discloses a high-strength, low-temperature and wear-resistant power cable which mainly comprises three aluminum alloy conductor cable cores, a polyester fiber layer, an aluminum copper clad armor layer, a neoprene sheath layer, an ethylene propylene rubber insulating layer and a steel tape armor polyolefin sheath layer, wherein the three aluminum alloy conductor cable cores are twisted together; the polyester fiber layer is wrapped outside the three aluminum alloy conductor cable cores; the aluminum copper clad armor layer is wrapped outside the polyester fiber layer; the steel tape armor polyolefin sheath layer is arranged on an outermost layer; and sixteen copper conductors are extruded in outer clad layers of the cable cores. The cable has the characteristics of high rigidity, wear resistance, high strength, high thermal stability, innocuity, radiation resistance, flame retardance and the like, and can keep an excellent mechanical property at a freezing air temperature in the north.

The invention discloses a release agent for lead storage battery grid casting and a preparing method thereof. The release agent for lead storage battery grid casting comprises the following raw materials of, by mass, 100 parts of water, 4-6 parts of cork powder, 1.5-2.5 parts of volcanic ash, 1.5-2.5 parts of sodium silicate and 0.15-0.20 parts of phenolic resin. According to the release agent for lead storage battery grid casting, the volcanic ash of being high-temperature-resistant, high in viscosity, not easy to carbonize and small in particles is added, the fact that the release agent falls off too fast is reduced, the durability of the release agent is increased, the time interval of mould jetting during grid casting is extended, the work efficiency is improved, and the stability of plate grid gram weight is improved; and the water-soluble phenolic resin is added, the release agent has the advantages of heat resistance, flame resistance and water resistance and insulativity, the acid resistance is good, the alkali resistance is poor, the mechanical and electrical performances are good, demoulding is easy, the transfer rate is low, during synthesis, different components are added, the modified phenolic resin of different functions can be obtained, and the release agent has a variety of excellent characteristics such as alkali resistance, abrasion resistance, oil resistance and corrosion resistance.

The invention discloses a heat insulation coating applied to building exterior walls and relates to the technical field of coatings. The heat insulation coating is prepared from the following components: a styrene-acrylic emulsion, alkyd resin, nano silicon dioxide, allylboronic acid pinacol ester, hollow microspheres, hydroxyethyl cellulose, a vinyl-vinyl acetate copolymer, sodium ricinoleate organic modified sepiolite powder, a dispersant, a filler and deionized water. When the heat insulation coating is applied to the building exterior walls, the heat insulation coating is obvious in heat insulation effect, has flame retardance and weather resistance, is low in specific gravity, low in heat conduction coefficient, high in adhesion performance, difficult to fall off and high in toughness; meanwhile, the heat conduction coefficient of the coating is reduced; the light reflectivity of the coating is improved; the heat insulation effect is improved.

The invention relates to a composite steel plate. The composite steel plate is characterized by at least comprising an upper layer plate, an interlayer and a lower layer plate, wherein the upper layer plate can be a steel plate or a glass plate, if the upper layer plate is a steel plate, one or more peak parts can be arranged on the steel plate; the interlayer is produced by glass foaming or made of foamed glass and combined by a plurality of units, and a plurality of empty grooves are formed in the interlayer, thereby having the effect of saving material and simultaneously achieving the effects of heat insulation and flame resistance; the lower layer plate can be arranged or not necessary to arrange, if the lower layer plate is arranged, the lower layer plate can be a steel plate or a glass plate, if the lower layer plate is a steel plate, one or more small peak parts can be arranged on the steel plate, or the lower layer plate can be shaped into a flat plate; and gluing material can be coated on the lower side of the upper layer plate or the upper side of the interlayer to combine the upper layer plate or the interlayer into a whole; if the lower layer plate is arranged, the gluing material can be simultaneously coated on the upper side of the lower layer plate or the lower side of the interlayer during the step of coating the gluing material so as to combine the lower layer plate or the interlayer into a whole; therefore, the composite steel plate which is combined by the upper layer plate and the interlayer and has fire resistance and flame resistance is generated; or the composite steel plate with the fire resistance and the flame resistance is formed by combining the upper layer plate, the interlayer and the lower layer plate.

The invention discloses a high-temperature-resisting heating composite fabric. The high-temperature-resisting heating composite fabric comprises a moisture-absorption heating layer and a high-temperature-resisting protection layer, wherein the moisture-absorption heating layer and the high-temperature-resisting protection layer are compounded to form an integrated structure through a double-point coating; the moisture-absorption heating layer is made of moisture-absorption heating fibers; the moisture-absorption heating fibers are composite fibers formed by loading heating nanoparticles on surfaces of hollow moisture-absorption fibers; a nano heating layer is further loading on one face, which is compounded with the high-temperature-resisting protection layer, of the moisture-absorption heating layer; the high-temperature-resisting protection layer is formed by blending carbon fibers and Kevlar fibers. The invention further provides a preparation method of the high-temperature-resisting heating composite fabric; the high-temperature-resisting heating composite fabric is prepared through preparing the nanoparticles, preparing nano gel, preparing the moisture-absorption heating fibers, preparing a fabric layer, loading the nano heating layer, preparing the composite fabric and metering and packaging; the high-temperature-resisting heating composite fabric has excellent far infrared heat accumulation and temperature raising performance and high-temperature-resisting performance and has relatively good heat absorption and heating effect and protection effect.

The invention relates to a heat insulation building material which comprises the following raw materials by mass percent: 20-40% of fine sand, 30-50% of cementing material, 10-40% of heat insulation material, 10-30% of mineral admixture and 5-10% of other auxiliary materials. A production technology of the heat insulation building material comprises the steps of mixing and stirring a shell cementing material, producing foam concrete, cutting and fixing the foam concrete and a heat insulation core body of a polystyrene foam plastic board, pouring, vibrating and molding shell slurry, and maintaining building blocks. The heat insulation building material can be used for replacing a great deal of solid clay bricks, thus saving a great deal of energy and land for China, being capable of consuming a great deal of industrial solid wastes and being beneficial to the environmental protection. The produced construction product has the excellent characteristics of being good in heat insulation property, light in self weight, high in strength, waterproof, impervious, low in shrinking percentage, long in service life, simple in construction and the like, thus being beneficial to the development of building energy conservation.

The invention discloses a nano antibacterial preservative film for fruits / vegetables, and belongs to the technical field of preservative films. The nano antibacterial preservative film comprises the following raw materials in parts by weight: 20-25 parts of linear low-density polyethylene, 6-10 parts of low-density polyethylene, 8-11 parts of polyvinylidene chloride, 3-5 parts of acetic acid, 5-7 parts of gelatin, 3-5 parts of nano silicon dioxide, 6-8 parts of nano molecular sieve, 1-2 parts of silver powder, 1-2 parts of titanium white powder, 2-4 parts of zinc oxide, 0.5-0.8 part of carboxymethyl cellulose, 0.5-1.5 parts of paraffin, 1-2 parts of antifogging agent, 0.1-0.7 part of antimicrobial agent, 3-4 parts of plasticizer and 1-3 parts of coupling agent. The invention also discloses a preparation method of the nano antibacterial preservative film for fruits / vegetables. The nano antibacterial preservative film is environmentally friendly, excellent in mechanical property and favorable in air and moisture permeability, causes less pollution, and has excellent antibacterial and preservative capabilities.

The application provides a removal device and a removal method for volatile organic compounds in industrial waste gas, wherein the removal method mainly includes five steps: pretreatment of waste gas, adsorption by high-silicon molecular sieve, oxidization by ozone, discharge of waste liquid, and discharge of purified gas. The removal method has reasonable design, simple process and convenient operation and can completely remove the volatile organic compounds.

The invention provides a flame retardant grade antibacterial office supply made of PVC (polyvinyl chloride) / ABS (acrylonitrile butadiene styrene). The antibacterial office supply is characterized by being prepared from a composite resin, wherein the composite resin comprises PVC, ABS, an antibacterial agent, a flame retardant, a lubricating agent and a stabilizing agent. The office supply not only has good mechanical property but also has antibacterial property and flame retardance and can effectively prevent cross contamination of bacteria, viruses and the like caused by contact of the office supply in the offices and increase the preservation probability of the office supply when fire happens.

The invention discloses an antiskid pad. A plurality of antiskid lugs is formed convex on the bottom surface of the pad. A drainage groove is arranged on the surface of the antiskid lug contacting with the ground. Through the contact of the antiskid lugs with the ground, the antiskid lugs are pressed towards the ground when a human body or a heavy is acted on the pad, and the air, water or oil remained between the antiskid lugs and the ground is guided out through the drainage grooves, making the surfaces of the antiskid lugs be completely closed together, so that the grip force of the pad is improved. Thus the invention actually achieves good antiskid effect.

The invention discloses an integrated curtain wall and a construction method of a thermal-insulating wall system. The method comprises following steps: fixedly arranging fixing strips, erecting a first inner template, installing connection assemblies, installing thermal insulation plates, erecting a second inner template, coating cement mortar and decorating plaques. Wave-shaped metal screen plates are utilized to form a first inner template and a second inner template. A thermal insulation plate and multiple thermal insulation pipes are clamped between the first inner template and the second inner template. The cement mortar is coated outside the metal screen plates through a mortar spraying or smearing mode so that a thermal insulation wall with a hollow inner template is formed. Multiple connection assemblies are arranged on one side of the thermal insulation wall in an outwardly extending mode. The connection assemblies are connected fixedly with the multiple plaques so that the integrated thermal insulation wall and a curtain wall are formed. The integrated curtain wall and construction method of the thermal-insulating wall system have following beneficial effects: advantages such as thermal insulation, energy conservation, flame resistance, heat insulation, sound insulation, and water prevention are obtained; and the method is simple in formation, quick in construction, and is capable of shortening a construction period and protecting the environment.

The invention relates to a vacuum insulation board for an exterior construction wall and a production method thereof. The insulation board consists of a high-barrier thin film bag and a supporting object. The supporting object is made of a mixture of fumed silica, ultrafine micro-glass fiber and other fireproofing materials. The outer layer of the high-barrier thin film bag is provided with a glass fiber gridding cloth, the inner layer of the high-barrier thin film bag is provided with a PE (Poly Ethylene) heat-seal layer, and the middle layer of the high-barrier thin film bag is provided with a high-barrier thin film made of HDPE (High-Density Poly Ethylene), LDPE (Low-Density Poly Ethylene), LLDPE (Linear Low-Density Poly Ethylene), BOPA (Biaxially Oriented Poly Amide), BOPP (Biaxially Oriented Poly Propylene), EVOH (Ethylene Vinyl Alcohol), AL (Aluminum Leaf) and the like. According to the vacuum insulation board disclosed by the invention, a novel efficient insulation material is provided for the thermal insulation of the exterior construction wall by using the vacuum thermal insulation principle. And the vacuum insulation board has the advantages of environmental friendless, energy conservation, fire prevention and the like.

The invention is a soft bus with 100 Ohm plus or minus 5% property impedance, used in a LVDS signal transmitting system, able to reduce the number of components in the system and reduce the cost; and the system is composed of a low voltage difference signal receiver (LVDS), a soft bus with the above property, an auxiliary pinboard and a cover-lifting connector, where it uses the LVDS to compose signal transmission interface of LCD interface; one end of the soft bus composes a first conductive part connected with the cover-lifting connector and the other end composes a second conductive part connected with the LVDS; the auxiliary pinboard has a concave space holding the soft bus, fixed under a small segment of the soft bus including the second conductive part, and the second conductive part of the soft bus and the front end of the auxiliary pinboard compose a structure like LVDS plug, able to be inserted in the LVDS and connect with the LVDS; the cover-lifting connector is a signal transmission interface composing system mainboard interface.

The invention relates to a soft drop-out line structure with characteristic impedance of Z085-115 ohm, the structure includes insulating layer, electric wire layer, insulating layer and metal masking layer. The metal masking layer has several hollow out units with the same shape, the metal entity part of the metal masking layer has a good masking effect to the tin plated copper electric wire, thus the characteristic impedance Z0 can be changed, when the area of the metal entity masked by the metal masking layer, the area of the tin plated copper electric wire masked reach 4%-12%, the characteristic impedance Z0 is 85-115 ohm, it can satisfy the demands that the characteristic impedance Z0 must uses 100 ohm standard.

The invention discloses a high-toughness flexible power cable for a communication base station. The high-toughness flexible power cable comprises a circular aramid fiber core and an inner conductive layer; a plurality of trapezoidal conductors are stranded on the outer surface of the inner conductive layer; a fireproof flame-retardant layer wraps the outer surface of the polyethylene insulating belt, comprising mica paper, a first glass fabric and a second glass fabric; the mica paper is adhered to the first glass fabric and the second glass fabric through adhesive layers; a glass tape wraps the outer surface of the fireproof flame-retardant layer; a protecting sleeve layer comprises an inner polyvinyl chloride protecting layer at the inner side and an outer protecting layer at the outside; the outer protecting layer is prepared from a thermoplastic polyurethane phenol elastomer, low-density polyethylene, ethylene acrylic ester, an ethylene-butylene copolymer, silica, a nitrile compound, chlorinated polyethylene and zinc stannate. The cable is non-combustible, high in heat resistance, tight and difficultly to breath; in addition, the layering phenomenon due to relatively large material difference can be avoided; the contact surface compatibility and adhering firmness can be improved, and the product performances are increased.

The invention discloses a novel table tennis racket base plate which comprises a racket body, wherein the racket body comprises a core board layer and a panel layer; the upper surface and the lower surface of the core board layer are glued through a modified glutinous rice glue layer and the panel layer separately; the core board layer is made of a composite material sheet and the thickness is 3-5mm; the panel layer is made of a bamboo board and the thickness is 0.5-1mm; and the modified glutinous rice glue layer is made of modified glutinous rice glue and the thickness is 0.3-0.8mm. The novel table tennis racket base plate is uniform in density and equal in force reaction rates in various directions, has relatively high stability, high strength and sufficient toughness and has multiple excellent properties, such as electrical insulating property, corrosion resistance, combustion resistance and high-temperature resistance, the service life of a table tennis racket is prolonged, and meanwhile, the production cost is relatively low.

The present invention relates to preparation of a mono-epoxy-terminated polysiloxane-modified gelatin gradient membrane by a freeze-drying method. Surfactant sodium alkyl sulfate is dissolved in water and formulated into an aqueous solution, the aqueous solution is stirred for 1-2h at 40-60 DEG C under the condition of pH of 8 to 11, gelatin is added, stirring is performed for 4-8h, and mono-epoxy-terminated polysiloxane with the molecular weight of 500 is added to obtain a mono-epoxy-terminated polysiloxane-modified gelatin solution. The mono-epoxy-terminated polysiloxane-modified gelatin solution is centrifuged at a low temperature, after layering, water is added into an intermediate layer for even mixing, ethanol is added, after even mixing, 0.5-0.8ml of the mixture is measured and dropwise added into a gelatin substrate, standing is performed for 12-18h, liquid nitrogen is used for freezing, and the freeze-drying method is used for drying to obtain the mono-epoxy-terminated polysiloxane-modified gelatin gradient membrane. The mono-epoxy-terminated polysiloxane-modified gelatin gradient membrane has the characteristics that component concentration change is gradient in longitudinal section, and the mono-epoxy-terminated polysiloxane-modified gelatin gradient membrane is high in tensile strength, good in hydrophobicity and soft, and so on.

The invention discloses graphene-reinforced rubber and a preparation method thereof. The graphene-reinforced rubber comprises, by weight, 20-30 parts of graphene, 70-80 parts of rubber, 5-10 parts ofmetal powder, 0.5-1.0 part of a dispersant, 0.3-0.9 part of a vulcanizing agent, 2-5 parts of an accelerant and 3-8 parts of an activator. The performance experiments on the graphene-reinforced rubbershow that the addition of graphene with double-layer or three-layer structure evidently improves tensile strength and elongation at break for the rubber, the improved wear resistance of the rubber isdue to rubber stability enhancement under joint action of nano metal powder and graphene, and conductivity of the rubber is better than that of materials having no graphene or metal powder, with resistance greatly decreased.

The invention provides a smokeless flame-retardant high-temperature-resistant power cable. Each insulation wire core is formed by a conductor, an inner insulation layer and an outer insulation layer, wherein the conductor is wrapped by the inner insulation layer and the outer insulation layer sequentially. The smokeless flame-retardant high-temperature-resistant power cable is characterized in that a glass fiber layer is arranged outside each outer insulation layer, an insulation wire core is formed by one conductor, one inner insulation layer, one outer insulation layer and one glass fiber layer, a plurality of insulation wire cores are twisted to form one cable core, gaps of the cable core are filled with filling strips, and the cable core and the filling strips are wrapped by isolation layers. The outermost layer of the cable is an outer sheath, and the inner insulation layers are made of insulation materials of polyethylene or cross-linked polyethylene or irradiation cross-linked polyolefin. The inner insulation layers are formed by fire-resistant mica tape and a nano fireproof insulation layer.

The invention provides adsorption powder for reducing the oxygen content in a lithium ion battery pack, a composite support substrate and a battery. The adsorption powder comprises iron powder, chloride inorganic salt and a deoxidizer. The mass of the iron powder is (1-5) times that of the chloride inorganic salt, and the content of the chloride inorganic salt is (0.7-1.2) times that of the deoxidizer. According to the adsorption powder for reducing the oxygen content in the lithium ion battery pack, the composite support substrate and the battery, oxygen and moisture in the battery pack are eliminated, and even the support substrate capable of absorbing oxygen released by the positive electrode of the battery cell during thermal runaway can still be used for preventing and controlling thethermal runaway, so that the safety of a battery system is improved.

The invention discloses fire-resistant, oil-resistant and high-and low-temperature resistant industrial rubber which is prepared from the following raw materials: natural rubber, neoprene, nitrile rubber, ceramic ultrafine powder, palm oil, an adhesive, dimethicone, polyurethane, oleic acid, a softener, zinc oxide, PEG4000 and an anti-aging agent. The industrial rubber has great advantages in the aspects of fire resistance, oil resistance and high temperature resistance, cannot be worn or broken in use and is long in service life, the components are scientific and reasonable in proportion, safe and effective, the preparation method is easy to operate and the fire-resistant, oil-resistant and high-and low-temperature resistant industrial rubber is suitable for massive promotion in industry.

The invention relates to a special-grade fireproof highly-anti-flaming nanometer power cable which comprises a plurality of cable cores and an outer sheath. Each cable core is formed by a copper conductor, double-layer fireproof mica tape and a fireproof nanometer insulating layer, wherein the double-layer fireproof mica tape and the fireproof nanometer insulating layer are sequentially wrapped outside the copper conductor, anti-flaming filling ropes are filled outside the cable cores, glass fiber tape is wrapped, and the fireproof nanometer outer sheath is wrapped outside the glass fiber tape. The electric-conducting and anti-flaming capabilities of the cable are improved. The cable overcomes the shortcomings existing in a traditional cable, has excellent anti-flaming performance, and has simultaneously the advantages of being high in transmitting rate, small in line loss, high in safety performance in use, free of environmental pollution and low in installing and maintenance cost and the like. The special-grade fireproof highly-anti-flaming nanometer power cable is increasingly applied to various fields and occasions such as subways, nuclear power stations, markets, hospitals and intelligent buildings where the requirements for safety reliability of electrical equipment are high, and has good market prospects.

The invention relates to a modified gelatin gradient film prepared from mixed glycidol and single-epoxy-terminated polysiloxane. A method for preparing the modified gelatin gradient film includes dissolving surfactants in water to prepare aqueous solution; adding gelatin into the aqueous solution under the conditions of the temperatures of 40-60 DEG C and the pH (potential of hydrogen) of 8-11; stirring the gelatin and the aqueous solution for 4-8 h and then adding the single-epoxy-terminated polysiloxane into the gelatin and the aqueous solution continuously or in batches to obtain mixtures; carrying out reaction for 12-30 h and then adding glycidol into the mixtures; continuing to carry out reaction at the temperatures of 40-60 DEG C for 6-12 h to obtain milk white turbid liquid; adding ethyl alcohol into the milk white turbid liquid and uniformly mixing the ethyl alcohol with the milk white turbid liquid to obtain mixed liquid; dripping 0.5-0.8 ml of the measured mixed liquid on gelatin substrates; allowing the gelatin substrates to stand still for 12-18 h and then freezing the gelatin substrates by the aid of liquid nitrogen; drying the gelatin substrates by the aid of a freeze dryer to obtain the gradient film. The dosage of the gelatin is 1-10% of the mass of the aqueous solution. The dosage of the single-epoxy-terminated polysiloxane is 0.2-1.0 times the molar weight of the gelatin. The dosage of the glycidol is 0-1 times the mass of the single-epoxy-terminated polysiloxane. A volume ratio of the ethyl alcohol to reaction liquid is (3-5):1. The modified gelatin gradient film has the advantages that the concentration of components of the modified gelatin gradient film changes in longitudinal sections in a gradient manner, the modified gelatin gradient film is high in tensile strength and good in hydrophobic property and is soft, and the like.