61results about How to "Good electrical resistance" patented technology

Disclosed is a successively biaxially stretched film obtained by successive biaxial stretching method comprising extruding a melt of a β-crystal nucleating agent-containing polypropylene-based resin composition from a T-die, cooling the extruded resin on a chill roll, and stretching the resulting web sheet longitudinally and then transversely, wherein the longitudinally stretched sheet is made to have a degree of β-crystal orientation of less than 0.3 by the following method (I) and / or (II), optionally subjected to annealing treatment, and transversely stretched:method (I): melting the polypropylene-based resin composition containing needle crystals of a specific β-crystal nucleating agent at a temperature not lower than m.p. of the polypropylene-based resin and lower than dissolution temperature of the β-crystal nucleating agent in the polypropylene-based resin melt, and extruding the melt from the T-die at the same temperature,method (II): adjusting neck-in ratio during longitudinal stretching to 25 to 55%.The porous polypropylene film has good breakage resistance during manufacture, excellent thickness uniformity, high porosity and air-permeability, and is useful for battery separators.

The invention relates to a high-molecular-weight polymer nucleating agent-modified ultrahigh-molecular-weight polyethylene blend material. The blend material comprises the following raw materials by weight: 60 to 100 parts of UHMWPE, 5 to 12 parts of HDPE, 6 to 16 parts of LLDPE, 0.1 to 3 parts of a high-molecular-weight polymer nucleating agent and 1.5 to 3 parts of a flow modifier. The high-molecular-weight polymer nucleating agent has the advantages of no odor, good dispersibility, good compatibility, capacity of realizing heterogeneous crystallization, a high degree of crystallization and a small application amount; the high-molecular-weight polymer nucleating agent-modified ultrahigh-molecular-weight polyethylene blend material retains original characteristics of polyethylene UHMWPE and has obviously improved tensile strength, impact strength, bending strength, Vicat softening temperature, elongation at break and Shore hardness and a reduced mortar wear rate.

The plugging technology for SF6-insulation electric equipment comprises: adding nano powder of Al2O3 / 10 or SiO2 / 10 into polyurethane to mix with polyacrylate and form mixture (1) for coating on the surface of leakage (3); after partial drying and hardness up to 70+-5%, coating plugging material (2) on surface of (1); wherein, in material (1), the weight ratio of basis material, curing agent and nano powder is 1:1:0.1; in material (2), the weight ratio of basis material and curing agent is 1:1. This invention applies two-stage coating technology, overcomes defects in prior art, and has wide application.

The invention discloses a weather-resistant halogen-free flame-retardant light diffusion PC / PBT material for a charging pile panel and a preparation method thereof. The material comprises the following raw materials in parts by weight: 77-85 parts of polycarbonate, 8-12 parts of PBT, 7-11 parts of bisphenol A bis(diphenyl phosphate), 0.3-0.7 part of methyl phenyl siloxane, 0.3-1 part of a transparent toughening agent, 0.4-0.8 part of an antioxidant, 0.1-0.4 part of a light stabilizer, 0.1-0.4 part of an ultraviolet light absorber, 0.2-1 part of an aldehyde inhibitor and 0.5-1 part of a light diffusion agent. The invention also provides a preparation method of the PC / PBT material. According to the invention, the halogen-free liquid flame retardant and an auxiliary flame retardant are compounded, so that a PC / PBT material product can achieve a V0-grade flame retardant effect in an extremely thin state without adding a dripping agent PTFE, the haze and transparency are good, the mechanical properties are not influenced, and the comprehensive properties of the PC / PBT material are improved.

The invention discloses a yarn wet-method waxing process, which comprises the following steps: diluting molten wax with cold deionized water, adding acetic acid to regulate the pH value to 5 to 6, uniformly stirring, and adding into a cheese dyeing machine; performing post-treatment of yarns, dyeing, dehydrating and soaking the yarns in the cheese dyeing machine filled with the molten wax; and dehydrating and drying the soaked yarns at 100 to 120 DEG C. The process makes it is convenient to operate, and is applicable to processing of cellulosic fibers and blended yarns, particularly cotton yarns. The processed yarns can be directly used in weaving after being dried; and the dynamic friction value of the surface of the processed yarns is low, so that the hairiness phenomenon is eliminated effectively.

The invention relates to the technical field of ceramic part manufacturing, in particular to a sintering process for an automobile ceramic sparking plug. The sintering process comprises the five steps of isostatic compaction, abrasive machining, biscuit firing, glazing and high-pressure sintering. According to the sintering process, dry pressing molding is used for replacing a traditional slurry injection hot briquetting process, an isostatic press is used for conducting cold press molding on dry powder, and in the process engineering, the parameters such as the feeding amount of the dry powder, the heating temperature and time, the thickness of an enamel layer are continuously optimized. A formed sparking plug product is high in density, small in sintering shrinkage, stable in thermal performance, high in production efficiency and high in applicability.

The invention discloses an epoxy resin micro-nano blended composite material for packaging a power electronic high-power device and a preparation method thereof, and belongs to the crossing field of high voltage and insulation technologies and composite materials. In the process of preparing the composite material, firstly, nano aluminum nitride, whose surface is modified by a silane coupling agent, is prepared and is served as a heat conduction filler, nano aluminum nitride is evenly dispersed in epoxy resin through ultrasonic waves, and the micro-nano blended composite material is prepared through the processes of vacuum degassing, perfusion molding and the like. The micro-nano blended composite material has excellent thermal conductivity and electrical insulation performance, and can beused as a power electronic high-power device packaging material. The preparation method of the micro-nano blended composite material is simple, easy to operate, low in cost and suitable for industrial production.

Disclosed is a surface acoustic wave resonator which comprises, on a piezoelectric substrate 19 , an IDT electrode 1, reflector electrodes 2 disposed to be adjacent to both sides of the IDT electrode 1 in a main propagation direction F of surface acoustic waves at the IDT electrode 1 , and auxiliary reflector electrodes 3 that are disposed at four positions external to the reflector electrodes 2 on virtual straight lines extending from the bus bar electrodes 12 a of the IDT electrode 1 in an inclined manner so that the periodic direction G of periodically arranged electrodes 14 b is oriented toward the IDT electrode 1.

The invention discloses an acrylic fiber conductive filament and a method for preparing the same by the aid of complexation and doping processes. The acrylic fiber conductive filament and the method have the advantages that acrylic fiber filaments are used as matrixes, bark-shaped surface structures of the acrylic fiber filaments and the electronegativity of -CN are sufficiently utilized, the acrylic fiber filaments are compressed, heated and impregnated in closed acidic copper sulfate solution, Cu2S and CuS on the surfaces of fibers are converted into Cu9S5, certain silver ions are further doped to form a stable complex compound, and accordingly conductive treatment procedures can be carried out on filaments; reaction on the acrylic fiber conductive filament prepared by the aid of the complexation and doping processes is easy to control, colors of the obtained fibers are controllable, and the fibers are high in affinity and excellent in sterilization, deodorization and anti-radiationperformance, and have lasting conductive characteristics.

A surface steel nail type steel sleeve packed optical fiber raster strain sensor and method the same comprises a bare optical fiber and a packed material, and is characterized in that the tail of the bare optical fiber is provided with a sleeve; the sleeve is arranged in an armoured cable; the outside of the armoured cable is provided with the steel sleeve; two ends of the steel sleeve are respectively provided with an end part expanding head; the surface of the steel sleeve is welded with a plurality of steel nails. The intensity of the sensor can meet the condition of long road engineering service period, severe service environment and the like, making a sensor and a pavement to reach the best cooperative transformation effect, thereby reducing the measuring error caused by difference module of the sensor and the pavement. The surface is welded with the steel nail and two ends are provided with the expanding head form the packed steel sleeve, on the foundation of the sensor adapted to the severe use condition of the road, according to the asphalt pavement material type, the size and the pitch of the sensor surface steel nail can be adjusted, thereby achieveing the best cooperative deformation effect between the sensor and the asphalt concrete.

A boundary acoustic wave device includes a piezoelectric substance, a dielectric substance laminated on the piezoelectric substance, and an electrode film disposed at a boundary between the piezoelectric substance and a dielectric substance, the device utilizing a boundary acoustic wave propagating along the boundary, wherein the electrode film is any one Au alloy electrode film of an Au alloy electrode film including Cu at a ratio of about 0.01% to about 4.8% by weight, an Au alloy electrode film including Pd at a ratio of about 0.01% to about 6.8% by weight, and an Au alloy electrode film including Ni at a ratio of about 0.01% to about 3.5% by weight.

The invention discloses bioengineering plastic which is prepared from, by weight, 60-70 parts of fluorenone-chitosan polycondensate, 30-40 parts of polyhydroxyalkanoate PHA, 5-8 parts of biomass-basedgraphene and 1-3 parts of silane coupling agent KH560. A preparation method of the bioengineering plastic includes following steps: well mixing fluorenone-chitosan polycondensate, PHA, biomass-basedgraphene and the silane coupling agent KH560; adding the same into a double-screw extruder for extrusion molding to obtain the bioengineering plastic. The bioengineering plastic is high in strength and mechanical modulus, low in latent degeneration, high in wear resistance, excellent in fatigue resistance, chemical drug resistance, electricity resistance, flame resistance, weatherability, impact resistance, thermal resistance and size stability, energy-saving and environment-friendly.

A surface acoustic wave device includes a piezoelectric single crystal substrate and an electrode. The piezoelectric single crystal substrate is made of LiTaO3 or LiNbO3. The electrode includes a titanium film formed on the piezoelectric single crystal substrate and an aluminum film or a film containing aluminum as a main component. The aluminum film or the film is formed on the titanium film. Thealuminum film or the film containing aluminum as the main component is a twin crystal film or a single crystal film, the aluminum film or the film has a (111) plane that is non-parallel to a surfaceof the piezoelectric single crystal substrate with an angle theta, and the aluminum film or the film has a [-1, 1, 0] direction parallel to an X-direction of a crystallographic axis of the piezoelectric single crystal substrate.

The invention discloses a yarn wet waxing process, wherein a yarn is sequentially subjected to dilution, PH value adjusting, impregnation, and dehydration drying to complete the waxing process. According to the present invention, the excellent and uniform waxing effect can be achieved by using the wet waxing of the liquid wax, the treated yarn has characteristics of low surface kinetic friction value, weaving enhancing, and hairiness reducing; and with the waxing process, the cohesion between the fibers is increased, the strength of the yarn is improved, the yarn is smooth and soft, and is easy to weave, the addition of the softener is not required, yellowing and discoloration cannot occur during the treatment and the drying process, the removal with the refining is easily performed, and the knitted fabric has characteristics of good hand-feeling and good electric resistance.

The invention relates to the technical field of cables, and discloses a crosslinked polyethylene cable insulating material and a preparation method thereof. The crosslinked polyethylene cable insulating material is prepared from the following components in parts by weight: 80-90 parts of low-density polyethylene, 2-3 parts of dicumyl peroxide, 0.5-1.5 parts of modified nanometer aluminum oxide, and 1-2 parts of high-voltage stabilizer composite particles. The prepared crosslinked polyethylene cable insulating material has the excellent conductivity temperature characteristic, 'inversion' of anelectric field does not occur in a cable insulating layer, in addition, a voltage stabilizer is not degraded and does not reach with an auxiliary in the cable material extruding and crosslinking processes, thus the action effect of the voltage stabilizer is improved, the local discharge and electric tree capacity of the polyethylene insulating material is improved, and thus the direct-current breakdown strength of the material is improved.

The invention relates to a high-molecular-weight polymer nucleating agent-modified ultrahigh-molecular-weight polyethylene blend material. The blend material comprises the following raw materials by weight: 60 to 100 parts of UHMWPE, 5 to 12 parts of HDPE, 6 to 16 parts of LLDPE, 0.1 to 3 parts of a high-molecular-weight polymer nucleating agent and 1.5 to 3 parts of a flow modifier. The high-molecular-weight polymer nucleating agent has the advantages of no odor, good dispersibility, good compatibility, capacity of realizing heterogeneous crystallization, a high degree of crystallization and a small application amount; the high-molecular-weight polymer nucleating agent-modified ultrahigh-molecular-weight polyethylene blend material retains original characteristics of polyethylene UHMWPE and has obviously improved tensile strength, impact strength, bending strength, Vicat softening temperature, elongation at break and Shore hardness and a reduced mortar wear rate.

The present invention is a plugging technology for SF6-insulation electric equipment, belonging to the field of electric equipment and comprising: adding nano powder of Al2O3 / 10 or SiO2 / 10 into polyurethane to mix with polyacrylate and form mixture (1) for coating on the surface of leakage (3); after partial drying and hardness up to 70+-5%, coating plugging material (2) on surface of (1); wherein, in material (1), the weight ratio of basis material, curing agent and nano powder is 1:1:0.1; in material (2), the weight ratio of basis material and curing agent is 1:1. This invention applies two-stage coating technology, overcomes defects in prior art, and has wide application.

The invention discloses a thermocouple compensation cable for an aircraft engine, which is formed by combining at least two types of wires. Each type of wires comprises a plurality of strands; all the wires are coated in the same pure nickel wire woven total shielding layer; a FEP (Fluorinated Ethylene Propylene) protection layer is also coated outside the pure nickel wire woven total shielding layer; one type of wires is formed by sequentially coating a synthetic mica and calcia-alumina-silica fiber woven layer, a high temperature resistance coating and a pure nickel wire woven branch shielding layer outside a nickel-chromium anode conductor. The invention provides the high temperature resistance and high reliability thermocouple compensation cable for the aircraft engine, solves the problem that in the prior art, the characteristics of high performance, light weight, high reliability, high temperature resistance and the like cannot be simultaneously implemented, and solves the problem of mutual restriction among the cable high temperature resistance requirement, the cable outer diameter setting, the working voltage requirement and the transmission requirement by the material selection and the structure design of the cable.

The invention provides a special tool fabric capable of resisting static aggregation. The special tool fabric is characterized by comprising the following raw materials in parts by weight of 40-50 parts of linen fibers, 15-25 parts of bamboo fibers, 5-10 parts of an antistatic modifier, 3-6 parts of modified talcum powder and 1-5 parts of bentonite powder. The preparation method of the antistatic modifier is shown in the specification. The tool fabric is prepared from the linen fibers, the bamboo fibers and other raw materials, and the anti-static performance of the fabric is improved by adding the anti-static modifier, the modified talcum powder and the bentonite powder; and the antistatic modifier is modified by graphene and then is mixed with composite powder, and the antistatic performance of the antistatic modifier is improved through the assistance of nano zeolite powder.

The invention relates to a cold-resistant rubber tube using both peroxide ternary ethylene-propylene rubber and a reclaimed rubber. The cold-resistant rubber tube comprises the following components: ternary ethylene-propylene rubber, ternary ethylene-propylene reclaimed rubber, zinc oxide, polyethylene glycol, stearic acid, an age resister SP-C, an age resister D, fast extruding carbon black N550, thermal cracking carbon black N990, china clay processed by a vinyl silane coupling agent, a plasticizer DOS, a coupling agent KBM-903, a cross-linking agent DCP and an auxiliary cross-linking agentVP-4. Compared with a sulfur vulcanizing system and a peroxide system which do not contain a reclaimed rubber tube, the formula of the cold-resistant rubber tube using both the peroxide ternary ethylene-propylene rubber and the reclaimed rubber has higher cold resistance, cooled liquid resistance, electric property resistance, ozone resistance and thermal ageing resistance, lower compression set,higher elongation, breaking strength and tearing strength and can better meet the requirements of a cooling system circulating water pipe and a connecting hose pipe which are used for a long time at a low temperature.

The purpose of the present invention is to provide a method for improving the electrical resistance of a separator, and the safety (CID starting time) and the battery characteristic (initial charge and discharge efficiency) of the electricity storage device provided with the separator. ), and a separator for the electricity storage device, which comprises a polyolefin microporous membrane containing one or more polyethylene, and the microporous film contains more than 1.0 wt% and 2.0 wt% or less of paraffin.

The invention discloses a BOPBT thin film. The BOPBT thin film consists of an upper surface layer, a core layer and a lower surface layer sequentially, wherein the core layer is a PBT polyester chip,and the raw material of the upper surface layer and the raw material of the lower surface layer both comprise, by weight, 70-76% of the PBT polyester chip and 24-30% of a PBT polyester master batch. The invention further discloses a preparation method of the BOPBT thin film. According to the BOPBT thin film, the PBT polyester chip and the PBT polyester master batch are adopted for the first time,and the BOPBT thin film is produced on biaxially oriented production equipment; and compared with traditional BOPET thin films, the BOPBT thin film has better properties in terms of water resistance,oxygen resistance and the like and meanwhile has the characteristics of good biodegradation, heat resistance, electrical insulation, water absorption resistance and the like, thereby having broader application prospects.

The invention discloses a preparation method of synthetic material auxiliary fluid for switch processing. The preparation method basically comprises the following steps: adding hydrogen peroxide and a calamine lotion into a mixer, and sufficiently mixing, so as to form mixed liquor; feeding the mixed liquor into a centrifugal blender to perform centrifugal blending on the mixed liquor, then adding fluorite powder, a synergist, a nucleating agent, a lubricant, an antioxidant and an initiator sequentially into a blender, blending the materials, pouring out mixed materials, mixing the mixed materials, uniformly mixing the mixed materials with a graphitic lubricant, polypropylene, dimethicone, silicic acid hydrate, a stiffening agent, talcum powder, a surfactant and bismuth potassium citrate tablets, and then refrigerating mixed auxiliary fluid in a refrigerating chamber. The preparation method has the advantages that the wear resistance and the electrical resistance of synthetic materials can be promoted after the synthetic materials are mixed, overall performance of the synthetic materials is further enhanced, and the synthetic material auxiliary fluid has the effect of improving the quality for produced switches.

The invention discloses a three-core cable used for a vessel. The three-core cable comprises a center reinforcement part which is composed of fiber glass filament bundles and located in the center. A first conductor, a first isolation body, a second conductor, a second isolation body, a third conductor and a third isolation body are arranged on the periphery of the center reinforcement part, tightly attached to the center reinforcement part and sequentially connected. A first cavity, a second cavity and a third cavity are formed in the first isolation body, the second isolation body and the third isolation body respectively. The peripheries of the first conductor, the second conductor, the third conductor, the first isolation body, the second isolation body and the third isolation body are wrapped with a coating layer formed by wrapping an aluminum plastic composite strip in a wound mode. A waterproof layer is arranged on the periphery of the coating layer, a protective outer sleeve is arranged on the periphery of the waterproof layer, and an armor layer is arranged between the waterproof layer and the coating layer and formed by wrapping the coating layer with multiple inclined aluminum wires in a wound mode. A tin metal layer is arranged between the coating layer and the armor layer. The three-core cable used for the vessel is simple in structure, good in flexibility, high in anti-interference capacity, good in corrosion resistance and convenient to drag.

The invention discloses a double-core cable for a pipeline which comprises a center strengthening member which is located at the center portion and is formed by glass fiber filament bundling, a first conductor, a first isolating body, a second conductor and a second isolating body which is closely attached to the center strengthening member, and the center strengthening member, the first conductor, the first isolating body, the second conductor and the second isolating body are connected sequentially. In an arbitrary cross-section, the upper surfaces of the first conductor, the second conductor, the first isolating body and the second isolating body and the lower surfaces of the first conductor, the second conductor, the first isolating body and the second isolating body bend toward the center of the center strengthening member and the curvatures of the upper surfaces are equal to the curvatures of the lower surfaces; in an arbitrary cross-section, the upper surfaces of the first conductor, the first isolating body, the second conductor and the second isolating body are located at the same circumference, the peripheries of the first conductor, the second conductor, the first isolating body and the second isolating body are sequentially wrapped by a shielding layer and a protection sheath, and the shielding layer comprises an aluminum sheath and a first copper wire braiding mesh and a second copper wire braiding mesh, wherein the first copper wire braiding mesh and the second copper wire braiding mesh are closely attached to the aluminum sheath from the two sides of the aluminum sheath. The double-core cable for the pipeline is simple in structure, good in flexibility and strong in anti-interference ability.

The invention relates to a preparation method, in particular to a preparation method of silicon substrates on a ceramic body, and belongs to the technical field of silicon on the ceramic body. According to the technical scheme provided by the invention, the preparation method of the silicon substrates on the ceramic body comprises the following steps: step one, providing a first silicon substrateand a second silicon substrate which are required, and cleaning the first silicon substrate and the second silicon substrate; step two, uniformly coating a ceramic buried material layer on the first silicon substrate, wherein the ceramic buried material layer comprises polysilazane; step three, bonding the second silicon substrate onto the first silicon substrate, wherein the second silicon substrate is isolated from the first silicon substrate through the ceramic buried material layer; and step four, carrying out a ceramization technology on the ceramic buried material layer so as to obtain aceramic body insulating buried layer positioned between the first silicon substrate and the second silicon substrate. According to the preparation method, the silicon substrates on the ceramic body can be prepared and obtained effectively, so that the processing steps are simple, safe and reliable.

The invention discloses a three-core cable used for a vessel. The three-core cable comprises a center reinforcement part which is composed of fiber glass filament bundles and located in the center. A first conductor, a first isolation body, a second conductor, a second isolation body, a third conductor and a third isolation body are arranged on the periphery of the center reinforcement part, tightly attached to the center reinforcement part and sequentially connected. A first cavity, a second cavity and a third cavity are formed in the first isolation body, the second isolation body and the third isolation body respectively. The peripheries of the first conductor, the second conductor, the third conductor, the first isolation body, the second isolation body and the third isolation body are wrapped with a coating layer formed by wrapping an aluminum plastic composite strip in a wound mode. A waterproof layer is arranged on the periphery of the coating layer, a protective outer sleeve is arranged on the periphery of the waterproof layer, and an armor layer is arranged between the waterproof layer and the coating layer and formed by wrapping the coating layer with multiple inclined aluminum wires in a wound mode. A tin metal layer is arranged between the coating layer and the armor layer. The three-core cable used for the vessel is simple in structure, good in flexibility, high in anti-interference capacity, good in corrosion resistance and convenient to drag.

The invention provides a silver nanowire anti-electromagnetic fabric and a preparation method thereof. The preparation method comprises the steps that chitosan and hydroxyl-terminated hyperbranched polymer modified silver nanowires are prepared, the fabric is coated with the chitosan and hydroxyl-terminated hyperbranched polymer modified silver nanowires through an electrostatic spraying process,and the silver nanowire anti-electromagnetic fabric is obtained after finishing. The fabric has excellent anti-electromagnetic performance, the computer shielding test is less than 10 uW / cm<2>, and the computer shielding test after 20 times of washing is less than 50 uW / cm<2>. According to the method, waste shells are used as one of raw materials, environmental friendliness is high, the process universality is good, and good popularization value is achieved.

The invention discloses a metal surface hardness easy-to-clean antibacterial vehicle shield and a preparation method thereof, and relates to the technical field of nano coatings. The coating comprises the following raw materials in parts by weight: 1-5 parts of a self-cleaning nano additive, 12-18 parts of hydrogen-containing silicon resin, 0.1-0.3 part of a catalyst, 12-18 parts of nano siloxane, 35-45 parts of methyl cyclohexane, 8-12 parts of an environment-friendly flux, 3-8 parts of a silicon-containing surface additive, 3-8 parts of nano silver and 0.5-3 parts of graphene. The method comprises the following steps: modifying the hydrogen-containing silicon resin, mixing the modified hydrogen-containing silicon resin, an environment-friendly flux, nano siloxane, methyl cyclohexane and a self-cleaning nano additive, putting the mixture into a high-pressure kettle, mixing, stirring and cooling to room temperature to obtain the antibacterial shield. The components are green and environment-friendly, the coating has excellent acid resistance, alkali resistance, antibacterial performance and mechanical strength, the preparation method is simple, convenient and easy to repeat, and the coating is suitable for being used as a coating on metal surfaces of automobiles, machines and equipment.

The invention relates to the technical field of addition type carbonate flame retardants and provides a method for preparing a phenoxy tetrabromobisphenol A carbonate flame retardant. The method comprises the following steps: (1) dissolving phenol and tetrabromobisphenol A in a chloralkane solution, and uniformly stirring; (2) dissolving bi(trichloromethyl) carbonate in the chloralkane solution in a reaction container at room temperature; (3) adding a catalyst into the reaction container; (4) dropwise adding alkaline liquor and a mixture dissolving solution prepared in the step (1) into the reaction container at a constant speed, and reacting for 1-2 hours at room temperature; (5) washing the solution prepared in the step (4) until the solution does not contain chloridion, and splitting the organic layer; and (6) dropwise adding the organic layer into hot water at the temperature of 70-95 DEG C, and separating out the coarse product by crystallization. According to the method, the target product, namely phenoxy tetrabromobisphenol A carbonate is directly obtained, the molecular weight controllability of the product is improved, the operation process is simple, and the operability is high.