70results about How to "Shielding" patented technology

A preparation method of a deep sea cable filling strip relates to a preparation method of a conductor filling strip. The preparation method comprises the following process steps: mixing rubber, a vulcanizing agent, a vulcanization accelerator, an antiager, a plasticizer, a reinforcing filler and a tackifier in parts by weight; and then calendering, slitting and packaging to obtain the finished product. The method has a simple production technology, stable technical properties and high practicability; the product is used in the cable and the cable core of the optical cable, the product has high strength, uniform thickness and a good saturated water absorption effect and has the functions of shielding and buffering the electric field; and the product also has viscoelasticity, thus the filling cable core is stronger and the service life of the optical cable can be prolonged.

The invention provides a double-sided tape for shading and reflection. The double-sided tape comprises a substrate layer, a first adhesive layer and a second adhesive layer, wherein the first adhesive layer and the second adhesive layer are respectively arranged on two surfaces of the substrate layer, any of the two surfaces of the substrate layer is provided with a white PET film of a black ink layer, the Hunter whiteness of the PET film is 80.0 to 85.0%, and the thickness of the PET film is 12 to 15 mu m. The invention further provides a preparation method for the double-sided tape for shading and reflection. The double-sided tape for shading and reflection has light reflectivity and light shielding performance, can meet a variety of performance requirements due to upsizing and thinning of mobile equipment and has excellent insulating properties, resistance to reflex action and stress relaxation performance.

The invention discloses a super clean antistatic resin composition, preparing method and product through utilizing this composition and application in barrier electromagnetic field, which comprises the following parts: 63-98% plastic base material; 1-30% nanometer grade carbon pipe and / or nanometer grade carbon black; 0.1-0.5% coupling agent; 0.1-5% dispersing agent; 0.5-1.5% oxidation resistance agent. This product possesses good electrostatic resistance property and super clean property.

The three-dimensional hollow double sandwiched fabric consists of one upper layer interwoven with two upper ground warp layers and one upper weft yarn layer, and one lower layer interwoven with two lower ground warp layers and one lower weft yarn layer, as well as one middle layer interwoven with two middle ground warp layers and one middle weft yarn layer. The weft yarn layers in the upper layer, the middle layer and the lower layer are also interwoven with the poil warps, so that the upper layer, the middle layer and the lower layer are connected integrally to form one hollow double sandwiched structure. The fabric of the present invention is uses as reinforcing body of composite material, and the composite material with the fabric is light, high in impact strength, high in antiwear performance, high in bending performance and high in rigidity. The double sandwiched structure may be also used in heat insulation, anticorrosion, real-time monitoring, etc.

The invention discloses a biodegradable polylactic acid agricultural mulching film and a processing technology thereof, and relates to the technical field of agricultural mulching films. The biodegradable polylactic acid agricultural mulching film is prepared from the following raw materials in parts by weight: 100-120 parts of polylactic resin, 15-30 parts of light calcium carbonate, 5-10 parts of polypropylene carbonate, 5-10 parts of carboxymethyl-beta-cyclodextrin, 1-5 parts of PEG-60 hydrogenated castor oil, 1-5 parts of hexakis(methoxymethyl)melamine, 1-5 parts of ultraviolet screening agent and 0.5-2 parts of antioxidant. According to the biodegradable polylactic acid agricultural mulching film and the processing technology thereof, the polylactic acid film is prepared by taking thepolylactic resin as a main material and co-taking a plurality of auxiliary materials, and the prepared polylactic acid film belongs to the biodegradable film and is non-toxic, harmless and strong inuse environmental protection property; and in addition, the usability is excellent, and the use requirement of the agricultural mulching film is met.

The invention relates to heat-insulation anticorrosive paint for a boiler rear smoke channel, a preparation method of the paint, and a paint composition. The heat-insulation anticorrosive paint for the boiler rear smoke channel comprises the following materials according to weight percentage: 20%-30% of ceramic microbeads, 20%-30% of carborundum, 20%-30% of boron nitride, 1%-5% of fine grain alumina, 1%-5% of superfine zinc oxide, 5%-10% of titanium oxide and 1%-3% of yttria. The heat-insulation anticorrosive paint composition for the boiler rear smoke channel provided by the invention is configured as a basement membrane substance and the paint composed of a supermicro fine powder material, wherein the basement membrane substance contains a plurality of OH active groups which fast react with active components of the supermicro fine powder material and an active surface of steel to generate an inorganic polymer with a three-dimensional structure, and a coating comprising the paint composition is integrated with a steel matrix to form a polymer anticorrosive coating with effects of electrochemical protection and physical shielding.

The invention discloses a miniature wide beam dual polarization microstrip antenna comprising a radiation substrate with four miniature radiation sheets and a feed network substrate nested in a support frame; the radiation substrate is arranged on the top of the feed network substrate; the feed network substrate is provided with two intersected feeders, the bottom face is provided with a metal base board, and the intersected positions of the feeders are connected through a bridge element; a feed probe is connected between each miniature radiation sheet and the feeder, and a short circuit rod is connected between each miniature radiation sheet and the metal base board; in addition, a support rod is arranged between the radiation substrate and the feed network substrate, and two ends of the support rod are connected with the radiation substrate and the feed network substrate respectively; one side of the bottom face of the metal base board is provided with a radio frequency joint connected with the feed portions of two intersected feeders. The miniature wide beam dual polarization microstrip antenna realizes miniature, wide beam, and dual polarization features.

The invention discloses a preparation method of a black polyimide film with static electricity prevention and shielding functions. The preparation method comprises steps as follows: an additive and polyamide acid are adopted, wherein the additive accounts for 0.5%-5% of polyamide acid in weight; the additive comprises nano-nickel powder, carbon black and a coupling agent, and nano-nickel powder accounts for 1%-8% of the total quantity of the additive; the carbon black accounts for 90%-98% of the total quantity of the additive; the coupling agent accounts for 1%-2% of the total quantity of the additive; polyamide acid is obtained from diamine and dianhydride through polycondensation in a solvent; during synthesizing, the nano-nickel powder, the carbon black and the coupling agent are dissolved in the solvent firstly, then respective required reacting weights of diamine and dianhydride are calculated in an equal molar ratio, polyamide acid is obtained through synthesis, and a product is obtained through defoaming and film casting. The product has the static electricity prevention effect, the volume resistivity of the product is 10<4>omega*cm-10<9>omega*cm, and meanwhile, the product has the excellent electromagnetic shielding effect and can be applied to the electronic fields such as a high-end flexible circuit board and the like.

The invention relates to an antibacterial antiviral non-woven fabric with an electromagnetic shielding function, a production method and a device. The antibacterial antiviral non-woven fabric with the electromagnetic shielding function is manufactured in a way that a common non-woven fabric is put into an antibacterial antiviral solution, wherein the antibacterial antiviral solution comprises the following components by weight ratio: 35%-45% of composite antibacterial material of silica-coated tourmaline and titanium dioxide particles, 30%-45% of coated composite carbon-based electromagnetic shielding material, 10%-35% of foam additive and 10%-20% of diluent. The antibacterial antiviral non-woven fabric with the electromagnetic shielding function has antibacterial, antiviral, electromagnetic-shielding and anti-penetration functions.

The invention provides an epoxy resin composite material with double functions of ultraviolet shielding and damage self-reporting and a preparation method, and belongs to the technical field of composite material preparation and structure monitoring. The composite material is prepared from 100 parts by weight of epoxy resin, 60-87 parts by weight of a curing agent, 0-9 parts by weight of a catalyst and 45-300 parts by weight of fibers. According to the system disclosed by the invention, an ultraviolet screening agent and any mechanochromic additive do not need to be added, and the obtained epoxy resin material can show excellent ultraviolet screening and mechanochromic capabilities. Meanwhile, the composite material can show strong color change under periodic impact, and an effective and accurate prediction capability is provided for material damage caused by mechanical impact. Different from analysis of an existing material after damage, the color of the polymer composite material can be changed before the polymer composite material is damaged and broken, and a warning effect is provided for guaranteeing safe use of the material.

A sacrificial anticorrosion water epoxy paint composition contains water-dispersive basic epoxy resin, multi-metal alloy powder, water-soluble solidifying agent prepared from polyamine and polyol, and rheologic nano assistant. Its advantages are high stability, excellent anticorrosion and mechanical performance of its film, and no release of harmful gas.

The invention discloses an anisotropic conductive adhesive and a preparation method thereof, and belongs to the technical field of conductive adhesives. The conductive adhesive comprises an insulation base material, a conductive particle and silver-plated fiber. The insulation base material is composed of n-butyl methacrylate, styrene monomer, hydroxypropyl methacrylate and ethylene glycol dimethacrylate. The conductive adhesive is prepared from, by mass, 10-15% of n-butyl methacrylate, 8-15% of styrene monomer, 10-20% of hydroxypropyl methacrylate, 8-15% of ethylene glycol dimethacrylate and 25-35% of the conductive particle. The conductive particle is the copper-plated silver ball conductive particle. The conductive adhesive has the advantages of being good in flexibility, stable in conductive performance, good in electromagnetic wave shielding effect and the like, and is applicable to connection of a light, thin, short and small driving IC and a substrate.

The invention discloses a microwave shield plate of a microwave oven door, and belongs to the technical field of microwave shield. The microwave shield plate is mainly characterized in that the periphery of the shield plate has an opening structure, each opening is an arbitrary shape, the size of each opening is that the width of the opening is greater than 0.5 mm and is less than 10 mm, optimally, the width of the opening is greater than 1 mm and is less than 4 mm, the opening depth and opening distance are determined to ensure that a bulge between any two adjacent openings is in close contact with the edge of a metal oven hole or the small plane of the edge of the metal oven hole, and the depth of the openings in the periphery of the shield plate in the metal oven hole is smaller than 25mm. The microwave shield plate with the characteristics can effectively shield microwave to prevent microwave leakage, a shield effect can achieve an ambient level, the zero leakage is realized, and the microwave shield plate has the notable advantages of simple structure and low manufacturing cost. The microwave shield plate provided by the invention is widely used by household microwave ovens and microwave instruments for laboratories and microwave shield and leakage prevention of microwave equipment for industries.

The invention discloses a polylactic acid / polyaniline / nanocrystalline cellulose composite conductive film and a preparation method thereof. The composite conductive film comprises, by weight, 100 parts of polylactic acid, 15-25 parts of polyaniline, 0-6 parts of nanocrystalline cellulose and 10 parts of polyethylene glycol. The preparation method is mainly based on a solution blending method, N,N-dimethylformamide is used as a solvent, polylactic acid is used as a base material, polyaniline is used as a conductive material, nanocrystalline cellulose is used as a reinforcing agent, and polyethylene glycol is used as a solvent and a lubricant. By magnetic stirring, ultrasonic dispersion, filtration separation, vacuum drying, cast molding and other processes, the polylactic acid / polyaniline / nanocrystalline cellulose composite conductive film is prepared. The prepared composite conductive film is free of toxins and environmentally friendly, the forming process is simple, the material sources are rich, and the film is good in mechanical properties and conductivity and excellent in biocompatibility and biodegradability.

The invention discloses aluminum oxide-containing polyaniline zinc powder flake epoxy heavy anti-corrosion coating and a preparation method thereof. The coating comprises a component A and a component B, wherein the component A comprises the following components in parts by mass: 35-85 parts of epoxy resin, 0.5-25 parts of polyaniline zinc powder flake, 0.1-10 parts of aluminum oxide, 0.1-5 parts of pigment, 1-15 parts of packing, 0.01-2 parts of anti-sag agent, 0.01-0.5 part of dispersant, 0.01-2 parts of flatting agent, 0.01-0.5 part of deforming agent and 5-40 parts of mixed solvent; and the component B comprises the following components in parts by mass: 40-90 parts of amine curing agent and 10-60 parts of solvent; and the coating is prepared by mixing and stirring the component A and the component B for 1-5 minutes according to a mass ratio being 1: (0.1-1):1. The corrosion resistance, seawater erosion and abrasion resistance, ageing resistance and anti-penetrating property of the coating system are obviously improved; and the coating can be applied to heavy anti-corrosion engineering in fields of petrochemical equipment, pipelines, offshore oil platforms, berthing facilities, ships and the like.

The invention discloses an alloy conductive plastic, which belongs to the technical field of plastics. The alloy conductive plastic comprises a substrate and a conductive material, wherein the substrate is a nylon material of which the relative viscosity is 1.5-1.7; and the conductive material is alloy powder of Cu, Fe, Ni and Ag of 100-150 meshes, and is blended, pelletized and molded. The volume ratio of the alloy powder of Cu, Fe, Ni and Ag is 1:1:1:1, and the mass ratio of the nylon material to the alloy powder is 10:3-10:6. The conductive plastic produced in the invention has the advantages of high volume resistivity, low specific weight, high tensile strength, current conductivity, heat conductivity, wear resistance, self-lubrication and the like, and can be used for manufacturing various plastic products having the characteristics of current conductivity, heat conductivity, electromagnetic shielding, static resistance and the like.

The invention belongs to the field of a cable, and particularly relates to a light and cold-proof screening control cable. An insulating cable core is formed by a stranded copper conductor of the screening control cable and a polyethylene insulating layer outside the stranded copper conductor; the insulating cable core is divided into an inner layer of the insulating cable core, a middle layer of the insulating cable core, and an outer layer of the insulating cable core; the middle layer of the insulating cable core is separated from the outer layer of the insulating cable core through a polyamide yarn loose lapping and tight bundling layer; a polytetrafluoroethylene thin film or a polytetrafluoroethylene lapping cushion layer is arranged outside the outer layer of the insulating cable core; a composite aluminum-plastic tape is arranged outside the polytetrafluoroethylene thin film or the polytetrafluoroethylene lapping cushion layer; a non-absorbent material isolation belt is arranged outside the composite aluminum-plastic tape; a high-permeability alloy belt is arranged outside the non-absorbent material isolation belt; the non-absorbent material isolation belt is arranged outside the high-permeability alloy belt; and a polyurethane jacket is arranged outside the non-absorbent material isolation belt. With the adoption of the light and cold-proof screening control cable provided by the invention, the problems that the conventional cable can not meet the requirement of cold resistance in special industries can be solved; and the light and cold-proof screening control cable is applicable to a condition with a temperature in a range from minus 70 DEG C to minus 100 DEG C in a metallurgy industry, an electric industry, a petrochemical industry and the like.

The invention discloses a waterborne polyurethane coating material capable of preventing neutron radiation and a preparation method of the waterborne polyurethane coating material, and belongs to the technical field of coating materials. The waterborne polyurethane coating material capable of preventing the neutron radiation is prepared from the following components in parts by weight: 30 to 50 parts of waterborne polyurethane emulsion, 3 to 10 parts of graphene, 10 to 20 parts of rare earth oxide, 10 to 20 parts of boron carbide, 5 to 10 parts of nano aluminum oxide emulsion, 1 to 2 parts of a waterborne dispersing agent, 1 to 2 parts of a waterborne defoaming agent, 1 to 2 parts of a waterborne wetting agent, 1 to 2 parts of a waterborne flatting agent, 0.5 to 2 parts of a waterborne suspending agent and 2 to 3 parts of a waterborne thickening agent. Waterborne polyurethane prepared by the invention has excellent mechanical performance and excellent bonding performance, and can be added into inorganic filler capable of preventing the neutron radiation in a large proportion.

The invention relates to a waterproof cross linked polyethylene insulated power cable. The cable comprises cable cores. The cable cores are wrapped by wrapping tape in a winding mode after being stranded, a cable core shielding layer is arranged on the outer side of the wrapping tape, a longitudinal waterproof layer is arranged on the outer side of the cable core shielding layer, a metal-plastic composite waterproof layer is arranged on the outer side of the longitudinal waterproof layer, a metal shielding layer is arranged on the outer side of the metal-plastic composite waterproof layer, a cross linked polyethylene insulated layer is arranged on the outer side of the metal shielding layer, an outer sheath layer is arranged on the outer side of the cross linked polyethylene insulated layer, and a semi-conductive coating is arranged on the outer side of the outer sheath layer. Each cable core comprises a conductor, and a conductive inner shielding layer, a conductor inner insulating layer, a corrugated aluminum wrapped waterproof layer, a waterproof layer, a conductor outer shielding layer and a conductive outer insulating layer are sequentially arranged on the outer side of the conductor. The waterproof cross linked polyethylene insulated power cable is provided with a good waterproof structure so that it can be effectively avoided that the water tree phenomenon is caused after the cable exists in a humid environment for a long time, and the cable is effectively protected.

The invention discloses a patch image collector with a metal shielding cover, which includes a lens module and a shielding cover. A lighting hole is formed at the top of the shielding cover, and an opening is arranged at the bottom end of the shielding cover. A hole for installing the lens module is formed in the middle of the shielding cover. Cavity, the lens module includes a lens and a photosensitive chip, the cavity includes an upper cavity for accommodating the lens, and a lower cavity for accommodating the photosensitive chip. The chips are pasted together, and the bottom of the shield extends downward to form several tin patches, and the photosensitive chip is an image sensor or a CMOS image sensor. The invention not only realizes the shielding and protection of the lens module, so that the lens module will not be disturbed by external light, but also can withstand a certain external force collision, and realizes the integrated packaging of the lens module, which has good consistency and is convenient Batch SMD production, but also play the role of no glue, no oil injection, no focusing and light leakage prevention.

The invention belongs to a chamber assembly for synthesizing a diamond and cubic boron nitride sintered body and an assembling method. The chamber assembly consists of a pyrophyllite composite block, a graphite heating tube, a magnesium oxide cup, an iron cup, a graphite cup, a molybdenum cup and a niobium cup, wherein the magnesium oxide cup, the iron cup, the graphite cup, the molybdenum cup and the niobium cup assembled and placed in the graphite heating tube in the pyrophyllite composite block are in close fit, sequentially the magnesium oxide cup, the iron cup, the graphite cup, the molybdenum cup and the niobium cup are arranged from outside to inside, and the molybdenum cup and the niobium cup are fastened together in opposite directions. The materials are simultaneously put in a pyrophyllite composite block sintering chamber with the graphite heating tube in a sequence from outside to inside. The deformation of the synthesized sintered body is small, the synthesis integrity rate is high, the residual stress in a super-hard material polycrystalline layer is small, the distribution is more uniform, the porosity is low and the large-sized sintered body can be prepared.

The invention discloses resin for pultrusion of a carbon fiber composite material. The resin comprises 30%-60% of an epoxy resin system, 10%-30% of an unsaturated resin system, 2%-5% of a flexibilizer, 3%-5% of an internal releasing agent, 5%-10% of an active diluent and 3%-8% of chopped conductive fibers. The method can be used for pultrusion of the electromagnetic shielding carbon fiber composite material, meets the requirements of low reaction viscosity, high activity and good strength of a resin system in the pultrusion process, and can utilize the fiber conductive enhancer in the resin system to supplement the defect that the electromagnetic performance of the material is independently improved by the reinforced fibers. By optimizing the combination of the resin and combining with thepultrusion electromagnetic shielding carbon fiber plate, the effect that the shielding effectiveness is greater than 40dB under 150KHz-18GHz is achieved. Meanwhile, due to the particularity of the fiber conductive enhancer in the resin, the invention provides a pultrusion process method using the resin system.

The invention relates to the technical field of adhesion and electromagnetic wave absorption, specifically to adhesion of electron components, in particular to an adhesive with a wave absorbing function and a preparation method thereof. The adhesive is prepared by fully mixing 100 parts of a resin matrix, 50-400 parts of wave absorbing powder, 50-100 parts of a curing agent, 1-10 parts of a coupling agent, 0-60 parts of a diluent and 0.5-5 parts of a catalyst. The preparation method comprises the following steps: stirring and mixing the resin matrix, the wave absorbing powder, the coupling agent and the diluent in parts by weight with a kneading machine to form a component A; dispersing the curing agent and the catalyst in parts by weight with a dispersant to form a component B; fully mixing the component A with the component B during use, uniformly smearing the mixture to an adhesive face, and curing the adhesive face for 24 hours at room temperature. Therefore, the problem that in the prior art, a common adhesive does not have the function of absorbing electromagnetic waves is solved.

The invention provides a controllable degrading magnesium-based metal material. The surface of the controllable degrading magnesium-based metal material is coated with biological active glass components modified by tannic acid, wherein the biological active glass components modified by tannic acid is formed by grafting nano biological active glass particles with tannic acid. By controlling the use amount of tannic acid grafted in the modified biological active glass components, adding amino structure compounds and controlling the coating thickness of biological active glass modified by tannic acid, the degrading time of the magnesium-based metal material can be effectively controlled.

The invention discloses a high-efficiency, electrostatic-prevention and laminated magnetic bead. The high-efficiency, electrostatic-prevention and laminated magnetic bead comprises an upper cover plate, a lower cover plate and a plurality of laminated dielectric layers, wherein the plurality of laminated dielectric layers are sandwiched between the upper cover plate and the lower cover plate, an upper leading-out electrode and a lower leading-out electrode are respectively embedded into the two dielectric layers at an upper end and a lower end and extend to top surfaces or side surfaces of the dielectric layers, internal electrode coils or connection points are arranged in intermediate dielectric layers, the dielectric layers and the dielectric layers with the internal electrode coils are laminated at intervals, the internal electrode coils are non-closed coils with openings, the dielectric layer to which a shielding coil is embedded is sandwiched between the upper cover plate and the upper leading-out electrode dielectric layer or between the lower cover plate and the lower leading-out electrode dielectric layer, the shielding coil is a closed coil without the opening, the shielding coil is not electrically connected with the upper leading-out electrode coil and the lower loading-out electrode coil, an electrostatic-prevention layer is arranged at sides, deviating from each other, of the upper cover plate and the lower cover plate, and a mite resistant layer is also arranged outside the electrostatic-prevention layer. The high-efficiency, electrostatic-prevention and laminated magnetic bead has the advantages of excellent electrostatic resistance performance and high economic value.

The present invention discloses a cable briaded bushing and its production method. It is made up by using diamagnetic metal fibre through the processes of cylinder-making, balling, braiding, winding-forming and packaging, etc.

The invention belongs to the technical field of radiation protection design, and particularly relates to an integrated shielding material composite structure. The integrated shielding material composite structure comprises a plurality of layers arranged inside and outside, each layer comprises a plurality of turning bodies composed of shielding material blocks, an installation gap is formed between every two adjacent turning bodies of each layer, and each shielding material block is made of a plurality of types of shielding materials. The composite structure is convenient to produce and install, can meet the performance requirements of the shielding structure in the aspects of temperature resistance, mechanics and the like, has the advantages of mechanical properties, welding properties, shielding properties and the like, can conveniently achieve the purposes of small size, light weight, low manufacturing cost and long service life, and has potential engineering value and economic value.

The invention discloses a flexible silicone elastomer, which comprises a component A and component B in a volume ratio of 1:0.95-1.05, wherein the component A comprises the following raw materials: branched chain vinyl silicone oil, hydroxyl silicone oil, modified phenyl silicone oil, a silane coupling agent, a catalyst, modified metal powder, a flame retardant and a filler; the component B comprises the following raw materials: branched chain vinyl silicone oil, hydroxyl silicone oil, hydrogen-containing silicone oil, an irradiation-resistant agent, modified metal powder, a flame retardant and a filler. The elastomer can be applied as a fireproof flame-retardant plugging material in the field of nuclear power, has the advantages of small hardness, soft quality, considerable displacementstretching and no change in performance, can quickly react at a plugging position at room temperature to form a flexible elastomer sealing structure, and also has the functions of biological shieldingand neutron shielding.