74results about How to "High electrical insulation" patented technology

The invention discloses a plant fiber environment-friendly material and a preparation method thereof as well as application of the material in tableware, toys, furniture, decoration or wall. The preparation method comprises the following steps of: pretreating, grinding and screening the plant fiber; mixing the screened plant fiber powder with an adhesive and a modification aid, and stirring at high temperature, wherein the adhesive mainly adopts hydroxypropyl methyl cellulose; filtering with a riddler, and dehydrating and preheating the screened organic synthesis plant fiber raw material; and performing high-temperature die pressing. According to the plant fiber environment-friendly material as well as the preparation method and application thereof, the product has good performance and additional functionality, can be applied to wider fields, conforms to relatively high requirements on using safety, and facilitates environmental protection so as to overcome the shortcomings of the existing plant fiber environment-friendly material and a preparation method and application thereof.

The invention provides a foam concrete with large-dosage polystyrene particles and a preparation method thereof, which solve problems of water leakage and frost resistance of the foam concrete. The foam concrete comprises components in part as follows: 63-81 parts of ordinary portland cement, 63-81 parts of quick-hardening sulphoaluminate cement, 10-30 parts of coal ash, 0.5-1.3 parts of water reducing agent, 1-2 parts of accelerating agent, 0.6-1.2 parts of early strength agent, 1-2 parts of fiber, 2-4 parts of silica sol, and 50-70 parts of water. The percentage in volume (liter) of the polystyrene particles in added water is 200-400percent, and the percentage in volume (liter) of foam in the added water is 100-600percent. In the preparation process, the treated polystyrene particles stand for 10 min, and the foam can be added after standing uniformly-stirred cement slurry for 20 min. On the premise of ensuring the intensity, the foam cement disclosed by the invention has the advantages of higher heat preservation and heat-shielding performance, higher electric insulating performance, lower volume weight and lower water absorption. The problems of the water leakage and the frostresistance of the foam cement can be solved.

The invention discloses a static spraying powder paint and preparing technology for electromagnetic wire and enameled wire, which comprises the following parts: 60-88% resin, 7-15% solidifier, 1-5% dye, 0-20% filler, 2-6% adjuvant. The preparing method comprises the following steps: blending the materials together; fusing to squeeze; cooling to indoor temperature; grinding into piece shaped material; separating the grinded powder into less than 160 order semi-product; demagnetizing to obtain the product.

The invention relates to an encapsulation structure of a fingerprint identification sensor and an encapsulation method thereof, and belongs to the technical field of semiconductor encapsulation. The encapsulation structure of the fingerprint identification sensor is characterized in that a groove is formed in the edge position of the top of a silicon substrate body, a sensor chip is arranged at the top of the silicon substrate body, and comprises a sensing element and chip electrodes arranged around the sensing element, an insulation layer I covers the surface of the silicon substrate body and an uncovered face of the groove, an insulation layer II covers the insulation layer I from the top down until an upper corner area I, a re-wiring metal layer enables electrode signals to drop to the bottom of the groove, a metal lead wire is connected with the re-wiring metal layer and a substrate, a dielectric layer is filled in an opening of the insulation layer I, a plastic seal layer seals all uncovered surface space of the silicon substrate body on the substrate, and a metal film layer is arranged on the surface of the plastic seal layer. The encapsulation structure of the fingerprint identification sensor can improve product insulating performance and reliability. The encapsulation method of the encapsulation structure of the fingerprint identification sensor uses a wafer level technology, is simple in encapsulation process, improves production efficiency, and conforms to a development trend of encapsulation industry.

The invention provides a production technology of powder extinguishing agent, comprising the following steps: smashing raw materials, separating, mixing, silicifying, drying and screening to obtain the powder extinguishing agent which takes ammonium dihydrogen phosphate and ammonium sulfate as base materials. The electric insulativity, the water repellency and the injection performance of the powder extinguishing agent are effectively improved, and the efficacy of extinguishing A, B and C-type fire hazards is obviously improved.

The invention provides an oil-resistant and high-temperature-resistant mining cable sheath material and a method for preparing the same. The oil-resistant and high-temperature-resistant mining cable sheath material comprises, by weight, 30-40 parts of chloroprene rubber, 25-35 parts of fluorine-silicon rubber, 20-30 parts of chlorosulfonated polyethylene rubber, 10-15 parts of fluoroether rubber, 6-8 parts of carbon nanometer fibers, 35-45 parts of carbon black, 10-15 parts of plasticizers TOTM, 8-12 parts of compound stabilizers, 2-4 parts of anti-aging agents 4010NA, 0.5-1.5 parts of anti-aging agents ODA, 0.8-1.2 parts of dicumyl peroxide, 6-10 parts of talc powder, 10-15 parts of compound flame retardants, 1-3 parts of accelerators TMTD, 10-20 parts of diatomaceous earth and 20-25 parts of modified kaolin. The oil-resistant and high-temperature-resistant mining cable sheath material and the method have the advantages that the chloroprene rubber, the chlorosulfonated polyethylene rubber, the fluorine-silicon rubber and the fluoroether rubber are compounded with one another, accordingly, the processing property and the mechanical property of the oil-resistant and high-temperature-resistant mining cable sheath material can be improved while the original properties of raw materials for the oil-resistant and high-temperature-resistant mining cable sheath material in a formula are guaranteed, the oil-resistant and high-temperature-resistant mining cable sheath material is excellent in physical and mechanical property, good in oil resistance, high-temperature resistance, abrasion resistance and insulating and flame-retardant property and long in service time, and the aging speeds can be obviously lowered.

The present invention relates to the preparation process and use of fluoro aromatic organic tetraacid dianhydride and its derivative. The present invention prepares fluoro aromatic organic tetrahydric dianhydride and its derivative through the Grignard reaction between metal trifluoroacetate and substituted halogeno benzene to produce alpha, alpha, alpha-trifluoromethyl phenyil ketone; the condensation reaction of the alpha, alpha, alpha-trifluoromethyl phenyil ketone and one-xylene under the action of strong acid to obtain fluoro aromatic tetramethyl compound; the high temperature nitric acid oxidation or KMnO4 oxidation of the fluoro aromatic tetramethyl compound to obtain fluoro aromatic organic tetracid; and the final dewatering. Fluoro aromatic organic tetrahydric dianhydride and its derivative may be prepared into fluoro aromatic polyimide with excellent comprehensive performance through condensation with aromatic organic diamine and subsequent imination.

The invention discloses a chloroethylene-vinyl acetate copolymer and the preparing method. The method comprises: converting the side group of chloroethylene-vinyl acetate copolymer into hydroxylated chloroethylene-vinyl acetate copolymer, then making it react with toluene diisocyanate and getting chloroethylene-vinyl acetate copolymer containing active toluene isocyanate group. The invention is characterized by high toughness, anti-corrosion, strong viscosity and low flammability, which are resulted from chloroethylene-vinyl acetate copolymer, and the introduction of isocyanate group increases the reaction activity, adhesive ability and hardness for chloroethylene-vinyl acetate copolymer, especially increases the compatibility, which enables it to react with more matter containing active hydrogen group and modify these matter. The invention is widely used as protective coating and anticorrosive paint for paper, metal and construction material, or used as single-component adhesives containing active isocyanate group, and as modifying agent for other matter's chemical and physical property.

The silane crosslinked polyethylene pipe union includes a silane crosslinked polyethylene pipe body produced by using the material comprising at least organosilicon monomer as grafting initiator, hydrolytic polycondensation catalyst and polyethylene as well as through extrusion or injection and reaction of crosslinking polycondensation and with spigots added. It is used to consitute permanent connection with silane crosslinked polyethylene pipe.

The invention discloses an immersed liquid phase change cooling medium and application thereof in a cooling system of electronic equipment, wherein the cooling medium is a mixture formed by mixing one, two or three of perfluoro-4-methyl-2-pentene, a hexafluoropropylene tripolymer, perfluorohexanone, perfluoroheptane, perfluorooctane, perfluoro-2-methyl-2, 3-epoxy pentane, perfluorohexane and perfluoropentane. The immersed phase change cooling medium provided by the invention has the characteristics of high electrical insulation property, low viscosity, relatively low boiling point, high gasification latent heat, good compatibility and stability, incombustibility, combustion inhibition, low global warming potential (GWP), zero ozone depletion potential (ODP) and the like.

The invention relates to a flame retardant combiantaion polyamide with modified electrical insulating property. It comprises a mixture, and the detail components and the proportion by weight of them are as follows: nylon66 40- 75%, red phosphorus agglomerate 10- 20%, compatibilizer 1- 10%, glass fiber 10- 35%, anti-oxidation agent 0- 1% and metallic oxidant 0- 1%. The grade of flame retardance of said polyamide can reach to VO grade of UL94 standard, and the electrical insulating property can reach to 400 V evaluated with relative leakage current index.The product is also characterized by good rigidity, high thermal resistance and stable size. It is suitable to be used to inject and shape various low voltage electrical equipment and domestic appliance with requirement for flame retardance and insulating property.

The invention discloses a scrubbing-resistant anti-microbial inner wall emulsion paint. The emulsion paint comprises raw materials: modified PVA, methyl methacrylate, polymethyl methacrylate, light calcium carbonate, talcum powder, lithopone, calcined kaolin, hydroxyethyl cellulose, a dispersant SN-5040, a dispersant SN-5027, a multifunctional auxiliary agent AMP-95, 2,2,4-Trimethyl-1,3-pentanediol monoisobutyrate, an antifoaming agent NXZ, negative ion-anti-microbial additives, sodium polyphosphate, a flatting agent, a nano stain-resistant agent NZM-1, propylene glycol, 5-chloro-2-methyl-4- isothiazolin-3-ketone and deionized water. The inner wall emulsion paint is not easy to generate powder, has good scrubbing resistance and stain resistance, is safe and environmentally friendly, and has a long anti-microbial validity period.

The invention discloses an anti-aging MPP (modified polypropylene) electric tube which is prepared from the following raw materials in parts by weight: 100-150 parts of polypropylene, 5-10 parts of light calcium carbonate, 1-8 parts of flake talcum powder, 2-10 parts of calcined kaolin, 1-5 parts of brucite powder, 20-40 parts of modified micro silicon powder, 0.2-3 parts of colorant, 2-10 parts of novel nucleating agent, 1-2.7 parts of antioxidant, 0.5-3 parts of polytetrafluoroethylene, 2-12 parts of master batch, 5-20 parts of melamine cyanurate and 5-15 parts of modified crystal whisker. The preparation process of the novel nucleating agent comprises the following steps: adding 150-180 parts of p-tert-butyl benzoic acid into 200-300ml of tetraisopropyl titanate, reacting at 90-130 DEG C for 3-5 hours, adding 100-150ml of silicate to obtain a solution A, adding the solution A into an ethanol-water mixture, hydrolyzing at 50-65 DEG C for 3-5 hours, filtering, and drying to obtain the novel nucleating agent. The anti-aging MPP electric tube has the advantages of high aging resistance, excellent impact resistance, excellent freezing resistance and excellent heat resistance.

The invention provides a degradable, flame-retarded and anti-bacterial surgical gown and a making method thereof. The surgical gown is made of a non-woven fabric, and the non-woven fabric comprises a first base fabric layer, a heat insulation layer, a waterproof layer, an anti-bacterial layer and a second base fabric layer which are sequentially bonded from bottom to top; the first base fabric layer is formed by crisscross distributing composite fibers which are formed by fusing and spinning polyhydroxybutyrate and polylactic acid; the second base fabric layer is formed by crisscross distributing composite fibers which are formed by fusing and spinning polypropylene and polyethylene glycol terephthalate; the surface of the first base fabric layer and the surface of the second base fabric layer are each provided with a plurality of through holes, the hole opening ratio is 90-95 percent, and the hole diameter is 0.1-0.2 mm. According to the surgical gown, the inner layer of the adopted non-woven fabric can be degraded, the good flame-retarded, moisture absorption, anti-bacterial and breathable functions can be achieved, the strength is high, and wearing is comfortable.

The invention relates to an injection moulding method of rubber and plastic electric insulation hand gloves and rubber boots, belonging to the technical filed of rubber and plastic moulding. The injection moulding method of the rubber and plastic electric insulation hand gloves and the rubber boots comprises the following steps: (1) taking rubber as a raw material; (2) plastication: thinly passing 3-15 times when the roller space on an open mill is 1-2mm; (3) mixing: mixing in the open mill or a banbury mixer; (4) filtering by a filter; (5) shaping to prepare rubber sheets the thickness of which is 10-30mm and the width is 40-200mm; (6) plasticizing: adding the rubber sheets to a plunger type rubber injection machine provided with a pre-plasticized screw rod to plasticize; (7) injection and sulfuration: connecting the nozzle of a movable plunger type rubber injection moulding machine provided with the performing screw rod with the injection hole of the mould locked in a flat-plate pressure vulcanizer, injecting size into a hand glove mould or a rubber boot mould for moulding, maintaining pressure and vulcanizing; and (8) demoulding products. The method of the invention has the advantages of simple process, accurate control, small equipment investment, low cost, high production efficiency, high product density, good comprehensive performance, high electric insulation degree and the like.

The invention relates to a polypropylene composite material containing wood powder and potassium titanate crystal whiskers, which comprises the following compositions in portion by weight: 600 to 800 portions of polypropylene, 100 to 400 portions of wood powder, 10 to 180 portions of potassium titanate crystal whiskers, 0 to 100 portions of inorganic filler, 0 to 100 portions of toughening agent, 0 to 50 portions of wax powder and 10 to 150 portions of other auxiliary agents, wherein the optimum proportion of the wood powder to the potassium titanate crystal whiskers is controlled to be between 3:1 and 2:1. Due to adoption of the method for adding the potassium titanate crystal whiskers and the wood powder in the polypropylene, the varisized modification of the polypropylene is realized; the combination of the wood powder and substrate polypropylene in the polypropylene is more stable; the defects in the material are further reduced; the strength, the impact resistance and the heat resistance of the prior modified polypropylene are further improved; and simultaneously the viscosity of a polypropylene fused mass system is reduced to make the application scope of the polypropylene wider.

The invention discloses an ethylene-propylene rubber insulating mouse-proof insect-proof low-smoke halogen-free flame-retardant direct-current high-voltage cable insulating material used for rail traffics. The insulating material is formed by the following raw materials by weight: 100 parts of ethylene-propylene rubber, 2.3-3.2 parts of vulcanizing agent, 0.3-1.2 parts of co-vulcanizing agent, 50-67 parts of reinforcing agent, 5-7 parts of microcrystalline wax, 5-7 parts of epoxy soybean oil; 0.8-1.2 parts of coupling agent, 8-10 parts of low-density polyethylene, 5-8 parts of zinc oxide nano-powder, 1.2-1.6 parts of anti-aging agent, 5-7 parts of red lead, 1.0-5 parts of magnesium oxide nano-powder, and 15-25 parts of white carbon black. The ethylene-propylene rubber insulating mouse-proof insect-proof low-smoke halogen-free flame-retardant direct-current high-voltage cable insulating material used for rail traffics has the advantages that the mechanical property and electric property of the direct-current high-voltage cable are enhanced effectively and the weather resistance is excellent.

The invention provides a low temperature resistant and corrosion resistant marine cable sheath and a preparation method thereof. The cable sheath is prepared from, by weight, 25-35 parts of fluorinated silicone rubber, 20-30 parts of low temperature resistant silicone rubber, 15-20 parts of fluorine rubber, 15-25 parts of modified kaolin, 10-15 parts of plasticizer TOTM, 5-8 parts of polyvinyl chloride, 1-4 parts of stabilizer, 5-10 parts of light magnesium oxide, 3-5 parts of epoxidized rapeseed oil, 2-4 parts of antioxidant, 10-20 parts of carbon black and 2-4 parts of graphene nanoplatelets. The low temperature resistant and corrosion resistant marine cable sheath has very good cold resistance and corrosion resistance, corrosion of sea water can be resisted, and the cable sheath can be used for a long time at the low temperature of -100 DEG C; meanwhile, excellent physical and mechanical properties are achieved, the wear resistant property and insulating property are good, the aging speed can be obviously reduced, and the use time is longer.

The invention relates to a metal coating, and in particular to a coating special for metal and a production method thereof. The coating special for metal contains the following raw materials in partsby weight: 50-60 parts of acrylic resin, 30-40 parts of polytetrafluoroethylene resin, 10-20 parts of inorganic montmorillonite, 10-20 parts of glass fiber, 20-25 parts of mica powder, 10-15 parts ofaluminium powder, 5-15 parts of ultraviolet shielding agent, 5-8 parts of butyl acetate, 3-5 pars of leveling agent, 2-3 parts of defoaming agent, 1-1.5 parts of dispersing agent, 0.8-1 part of anti-settling agent and 0.5-1 part of thickening agent. The prepared coating special for metal has excellent weatherability, fume resistance and self-cleanness, strong covering capability, good reflecting property for light and heat and strong corrosion protection; the surface of a metal workpiece processed by the coating is smooth, high in glossiness and uniform in color; and the dried paint film is excellent in chemical resistance.

The invention discloses a polyphenylene sulfide desalting method. The method comprises the following steps: carrying out temperature and pressure maintenance standing in a reactor after a polyphenylene sulfide synthesis reaction to make inorganic salts and inorganic additives settle to the bottom of the reactor, pumping a polyphenylene sulfide solution out of the reactor by using a pressure difference, cooling the solution, washing the precipitated polyphenylene sulfide product with ethanol and deionized water, and drying the washed polyphenylene sulfide to obtain highly pure polyphenylene sulfide. The method allows most inorganic salts and inorganic additives to be removed from polyphenylene sulfide in the reactor, and simplifies later purifying steps. The method can be implemented in the reactor after the polyphenylene sulfide polymerization reaction, and has the advantages of simple device, safe and convenient technology, saving of a large amount of purifying solvents, and convenient industrial production and popularization application.

The invention discloses an immersed phase change cooling medium and application thereof in a cooling system of an electronic device. The cooling medium is one or a mixture of two or more of perfluoro-4-methyl-2-pentene, perfluoro-2-methyl-3-pentanone, perfluoro-2-methyl-2, 3-epoxypentane and perfluorohexanone. The immersed phase-change cooling medium provided by the invention has the characteristics of high electrical insulation property, low viscosity, lower boiling point, high gasification latent heat, good compatibility and stability, incombustibility, combustion inhibition, low global warming potential (GWP), zero ozone consumption potential (ODP) and the like.

The invention discloses a glass fiber/carbon nanotube co-modified epoxy composite. The composite is composed of, on the basis of 100 g of epoxy resin, 0.2 g of carbon nanotubes, 10-40 g of glass fibers, 80 g of a curing agent, 0.1 g of an accelerator and 20 g of a coupling agent. The glass fiber/carbon nanotube co-modified epoxy composite has both electrical isolation properties and improved thermal conductivity. The invention also discloses a preparation method for the glass fiber/carbon nanotube co-modified epoxy composite.

The invention provides a halogen-free low-smoke flame-retardant fireproof power control composite braided shielding flexible cable for city track traffic. The cable comprises a DC power cable core and at least two control wire cores, each control wire core comprises a control wire core conductor and a control wire core insulation part, and the control wire cores are concentrically twisted outside the DC power cable core to form a control wire core layer; DC power cable core successively comprises DC power cable conductors, an extruded DC power cable insulation part and an extruded first fireproof inner sheath layer from the inside to the outside; and the control wire core layer externally successively comprises a wrapped first frame-retardant band, a longitudinally wrapped aluminum plastic composite tape, an extruded second fireproof inner sheath layer, a copper wire and coating flame-retardant material layer and an extruded oversheath layer from the inside to the outside. The cable provided by the invention has the advantages of quite high insulation performance, A-grade flame retardation, low smoke, zero halogen, fire resistance, water resistance, mice and ant resistance, ultraviolet prevention, electric field interference immunity, good flexibility, good bending performance and compact structure, and can realize power transmission and control, signal, protection and measurement functions.

The invention discloses super-tough flame-retardant PP and a preparation method thereof. The super-tough flame-retardant PP is prepared by mixing, by weight percentage, 40-60% of PP, 5-20% of flame retardant, 10-20% of toughening agent, 10-20% of flame retardant synergist, 2-10% of compatibilizer and 0.1-1% of anti-oxygen and anti-copper agent. The super-tough flame-retardant PP can replace flame-retardant ABS and flame-retardant PC to be applied to the field of sockets and extension sockets and is high in impact strength, high in heat resistance, high in flame retardance, high in electric insulation performance and the like.

The invention discloses an ABS plastic floor board, which is prepared by ABS plastic injection molding technology. ABS plastic is a terpolymer prepared from the following raw materials in percentage by weight: 5 to 30 portions of acrylonitrile, 10 to 30 portions of butadiene and 40 to 70 portions of styrene. The surface of the ABS plastic floor board forms a square or rectangular shape, while the upper surface is provided with antiskid skin lines, the edge is provided with convex and concave interfaces, and the lower surface is provided with a plurality of strip strengthening ribs. The ABS plastic floor board has the advantages of corrosion resistance, moisture resistance, high temperature resistance, wear resistance, inconductivity, easy cleaning, environment protection, no toxicity, no odor and the like.

The invention discloses a high-thermal-conductivity ceramic crucible. The high-thermal-conductivity ceramic crucible is prepared from the following raw materials in parts by weight: 60 to 75 parts ofa mixture of calcined spodumene powder and petalite powder, 15 to 25 parts of quartz, 25 to 35 parts of bauxite, 12 to 17 parts of a mixture of copper silicide and copper powder, 5 to 7.5 parts of silicon carbide fibers and 9 to 15 parts of calcined kaolin, wherein in the mixture of the calcined spodumene powder and the petalite powder, the mass ratio of the calcined spodumene powder to the petalite powder is 1:(0.2 to 0.4); in the mixture of the copper silicide and the copper powder, the mass ratio of the copper silicide to the copper powder is 1:(0.8 to 1.1). The high-thermal-conductivity ceramic crucible disclosed by the invention has excellent thermal conductivity, good heat resistance, low water absorption and high compressive strength.

The invention discloses a graphene heat-dissipating coating. The components used in the coating are calculated by weight percentage: 30-60% of water-based resin, 3-15% of nano-graphene, 0.5-2.5% of graphene dispersant, and 0.5% of water-based leveling agent. ~1.5%, water-based defoamer 0.5~1.5%, solvent 30~40%, the sum of the weight percentages of each component is 100%. The present invention comprehensively utilizes the high thermal conductivity of nano-graphene and the excellent bonding performance, high strength, excellent high temperature resistance and electrical insulation performance of the water-based resin, and disperses the nano-graphene in the water-based resin under the synergistic effect of various additives. Among them, a new environmentally friendly heat-dissipating coating was prepared, which has the advantages of good heat dissipation effect, low raw material price, environmental friendliness and quick and simple preparation method.

The invention discloses a high-thermal conductivity and high-insulation epoxy composite material, and a preparation method and an application thereof. The epoxy composite material comprises, by mass,100 parts of epoxy resin, 95-98 parts of a curing agent, 1-2 parts of a promoter, 10-50 parts of inorganic particles and 2-5 parts of a reinforcing agent. The epoxy resin composite material produced in the invention solves the problem of reduction of the electrical performances of the material, caused by the agglomeration and sedimentation of particles in the composite material when the addition amount of particles is high. The epoxy resin composite material prepared in the invention has a significantly improved thermal conductivity, and also has excellent electrical insulation properties.

The invention relates to a heat conduction nylon composite material. The heat conduction nylon composite material comprises, by weight, 40-50 parts of nylon resin, 50-60 parts of a heat conduction insulating material, 1-3 parts of a flexibilizer, 0.2-1.0 part of an antioxidant, 0.5-2.0 parts of a lubricant and 1.0-3.0 parts of color master batches. The heat conduction nylon composite material has the advantages of simple process, convenience in production, and high-efficiency, wide-spectrum and long-acting bacterinertness, and the mechanical strength, the appearance, the chemical stability, the processability and other basic performances of the nylon composite material are not affected. The invention also provides a preparation method of the heat conduction nylon composite material.

The invention discloses a wear-resistant electric insulating rubber material and a preparation method thereof, and relates to the technical field of electric insulating materials. The material comprises the following raw materials: butyl rubber, ethylene-vinyl acetate copolymer, modified mullite fiber, quartz powder, hydroxyethyl cellulose ether, methyl pentachlorostearate, hindered amine, hydroxycyclohexyl phenyl ketone, lubricant, crosslinking agent, flame retardant and nano oxide. The preparation method comprises operations of mixing, open milling and the like of the raw materials to prepare the wear-resistant electric insulating rubber material. The rubber material provided by the invention has the characteristics of simple preparation method, wide raw material sources, low cost, excellent comprehensive performance, high electrical insulating property, good mechanical properties, stable physical and chemical properties, oxygen resistance, wear resistance and aging resistance, greatly prolongs the service life of a product, and has broad market prospects.