42results about How to "Good shielding function" patented technology

The invention discloses a composite fiber material product, a preparation method thereof and an application thereof. The composite fiber material product comprises a piece of middle fiber material cloth (1), an upper surface film (2) arranged above the fiber material cloth (1) and a lower surface film (3) arranged under the fiber material cloth (1), wherein the outer surfaces of the upper surface film (2) and the lower surface film (3) are further provided with a layer of glass fiber cloth (4). The upper surface film and the lower surface film of the composite fiber material product can be respectively and internally printed with characters or patterns, the surfaces can be respectively formed to be a mirror surface or matting, and the composite fiber material product is attractive in appearance, free of air vents and needle eyes, good in rigidity, strong in impact resistance and mar resistance, and strong in heat resistance and corrosion resistance, so that the composite fiber material product can be widely used for manufacturing shells of various electronic products, electrical equipment, aviation and spaceflight equipment, and the like. The preparation method of the composite fiber material product is low in mould requirement, can be used for preparing the composite fiber material product with a surface which has the mirror surface or is matting. The follow-up treatment to the surface of the product can be avoided, such as polishing and the like, so that the invention is convenient to operate, and high in yield and production efficiency.

The invention belongs to the antistatic material field, particularly relates to a novel multi-layer composite material having an antistatic ability and a shielding ability. A multi-layer structure antistatic shielding sheet material is composed of at least two layers of materials, including at least an antistatic layer and at least a shielding layer. The multi-layer structure in the sheet material is formed by one-forming of a multi-layer composite sheet material production extractor. The antistatic layer and the shielding layer is preferably arranged separating from each other during usage. In order to overcome the deficiency of the current antistatic sheet material, the object of the invention is to provide a novel sheet material with the antistatic and shielding function, package bags or salvers of electronic products or other package products made by the sheet material also have the antistatic and shielding function.

The invention relates to a low-smoke halogen-free flame-retardant comprehensive shielded subway light rail signal cable comprising a cable core and an outer jacket. A plurality of lead groups are arranged in the cable core, a cable core taping layer and a metal strip armored shielding layer are sequentially coated between the cable core and the outer jacket, shielding layers are arranged outside half or more of the lead groups in the plurality of lead groups, and a cable core shielding layer is arranged between the cable core taping layer and the metal strip armored shielding layer. In the invention, a conductor of each lead has the diameter of 0.40-1.53 mm, and each lead has an insulation layer in a hull-foam-hull structure or a foam-hull structure. The shielding layer of the lead group is in the structure of wrapping a bilayer or single-layer copper strip or longitudinally wrapping a single-layer corrugated copper strip or weaving copper wire or tinned copper wire, and the cable core shielding layer is formed by longitudinally wrapping an aluminum-plastic composite strip or a pure aluminum strip or a pure copper strip. The invention has favorable shielding function, can lessen the mutual interference between cable lead groups and the interference of an external electromagnetic field with the cable, has enhanced mechanical and physical performance and flame-retardant performance, and can satisfy the signal cable use requirement of a traditional subway light rail system.

The invention discloses a long-carbon-fiber-reinforced nylon composite material with electromagnetic shielding function and a preparation method thereof. The composite material is composed of the following components in percentage by mass: 40-80 wt.% of nylon resin, 20-45 wt.% of long carbon fiber, 2-8 wt.% of alloy powder, 2-10 wt.% of maleic anhydride grafted low-density polyethylene (LDPE-g-MAH) and 0.1-2 wt.% of antioxidant. The preparation method of the composite material comprises the following steps: proportionally and uniformly mixing the nylon, alloy powder, LDPE-g-MAH and antioxidant, carrying came out melt blending on a double screw extruder, and directly extruding the melt into a dipping mold; sending the fiber bundle subjected to surface treatment into the cavity of the dipping mold under the action of tension to sufficiently dip the melt; and pulling the dipped fiber bundle out of the mold, cooling, and granulating to obtain the strip-shaped granules of which the length is 10+/-0.2mm. The composite material disclosed by the invention has the specific function of shielding high/low-frequency electromagnetic waves, and has excellent mechanical properties which are peculiar to long-fiber-reinforced plastics.

A fire-protection glass product having a heat shielding characteristic comprises a fireproof glass plate, a heat ray reflection film formed on one or both of opposite surfaces of the fireproof glass plate, and an oxidation prevention film formed on the heat ray reflection film.

The invention relates to a system and a method for rotatably obtaining a strong pulse gamma radiation field by a thickness collimator. A rotor and a fixed housing are combined to form a combined shutter which has a good shielding function and is convenient to rotate at a high speed so as to cut pulse of a stable gamma ray. The fixed housing is a section of cylindrical body which is internally sleeved with a rotary collimator provided with a through hole or a trough. An extremely small gap is reserved between two substances for controlled rotation of the rotor at the high speed. The rotating manner can be realized by a way of a roller, floating or magnetic levitation and the like, so that the narrow pulse of the gamma ray is further formed. The fixed housing is arranged, so that the weight of the rotary collimator is reduced, shielding to scattered rays around the rotor is increased, the quality parameter of the collimator after pulse incision is improved, and the weight of the rotary collimator is effectively reduced, so that a higher rotating speed is conveniently formed and the narrow pulse is obtained.

The invention relates to seamless knitting anti-electromagnetic radiation clothing and a manufacturing method thereof. The seamless knitting anti-electromagnetic radiation clothing consists of two layers of fabrics which are outer knitting fabric and inner shielding fabric. The outer knitting fabric comprises the following fiber compositions by weight percentage: 80-90 percent of chinlon 6 stretch yarns, 5-10 percent of chinlon 66 stretch yarns and 5-10 percent of spandex elastic fiber yarns; and the inner knitting fabric comprises the following fiber compositions by weight percentage: 50-55 percent of chinlon 6 stretch yarns and 45-50 percent of silver metal conductive fiber yarns; and after assistants such as 3 percent of leveling agents, 4 percent of detergents, 4 percent of creasing agents, 2 percent of penetrants and 0.5 percent of ammonium sulfate are added, an appropriate amount of dyes is added again. The seamless knitting anti-electromagnetic radiation clothing has the advantages of anti-electromagnetic radiation and good shielding effect and is comfortable to wear.

The invention relates to an antiaging nano composite thermal-insulation paint and a preparation method thereof, belonging to the technical field of a paint and a preparation method thereof. The paint is composed of the following components in parts by mass: 100 parts of base material, 0.7-1.2 parts of TiO2/ZnO nano composite powder and 1.5-2.2 parts of nano ATO (antimony tin oxide) powder. The base material comprises the following components in parts by weight: 100 parts of monomer, 0.5-1.5 parts of initiator, 1.1-1.5 parts of activating agent and 1.3-1.8 parts of emulsifier. The monomer is composed of acrylic acid and n-butyl acrylate in a volume ratio of 2:3, the initiator is sodium dodecyl benzene sulfonate, and the emulsifier is OP-10. The ratio of TiO2 to ZnO in the TiO2/ZnO nano composite powder is 10:(5.8-7), and the particle size range of the TiO2/ZnO nano composite powder is 40-70nm. The particle size range of the nano ATO powder is 20-70nm. The paint has the advantages of favorable visible light transmittance and favorable ultraviolet shielding function, and enhances the aging resistance of the coating.

The invention provides an ultra-fine cable applied shielding protection sheath film and production technology thereof. The structure of the shielding protection sheath film comprises a copper foil layer, a PET layer and a binding layer between the copper foil layer and the PET layer. One face of the copper foil layer and one face of the PET layer that face the binding layer are provided with electronic corona uneven faces. The copper foil layer, the binding layer and the PET layer are bond together as an entire body. The production technology of the ultra-fine cable applied shielding protection sheath film comprises the following steps: preparing materials, preparing binding agent, composing, placing and solidifying, separating and winding to attain a finished product. According to the invention, the copper foil layer in the shielding protection sheath film enables the shielding protection sheath film to possess good shielding, insulating, anti-wearing and anti-corrosion functions so that the inner cores of a cable are better protected and the quality of an ultra-fine cable improves. The production technology ensures that a shielding protection sheath film becomes thinner and narrower. The shielding protection sheath film can be designed as thin as 13 mu and as narrow as 1.5 mm to the best, thereby making an already ultra-thin cable finer and thinner. Further, the production technology process is simple, cost-effective and high efficient.

The invention provides an electric connector. The electric connector is characterized by comprising a conductive lead, a first insulating sleeve and a shielding housing, wherein two ends of the conductive lead are used for being electrically connected with a signal line of the matching electric connector; the first insulating sleeve sleeves the outside of the conductive lead, exposes two ends of the conductive lead and is used for electrically insulating an intermediate segment of the conductive lead from the surroundings; the shielding housing is roughly a cylinder with openings in two ends, sleeves the outside of the first insulating sleeve and is used for preventing the signal loss when the conductive lead transmits an electric signal; and at least one part of the cylindrical shielding housing is fixed on the first insulating sleeve. The invention further provides the matching electric connector matched with the electric connector. The electric connector provided by the invention is suitable for an extreme environment and also has an excellent shielding function on the basis of full insulation, and the signal loss can be prevented.

A microphone package includes a housing; a control circuit chip accommodated in the housing; a micro-electromechanical chip accommodated in the housing; and a circuit board forming an accommodation space with the housing. The circuit board includes a substrate, a rigid conductive layer disposed on the substrate and a plurality of conductive pads on the substrate for connecting to the control circuit chip. The micro-electromechanical chip and the control circuit chip are mounted on the rigid conductive layer, and the rigid conductive layer is provided with a number of isolation holes for receiving the conductive pads.

The invention provides an electric connector comprising an insulation body, several conductive terminals fixed in the insulation body, a shielding housing assembled on the insulation body and a nut assumed on the outside of the shielding housing. The insulation body has a plurality of terminal passageways extending therethrough in a front-to-back direction to receive the corresponding conductive terminals; the electrical connector further comprises an anti-vibration ring assembled to the outside of the shielded housing; the anti-vibration ring comprises a basal body and a plurality of elastic structures arranged on the basal body; the anti-vibration ring is clamped between the shielding housing and the nut so as to elastically abut against the shielding housing and the nut. The electric connector of the invention can effectively prevent vibration and has a good shielding effect.

An electrical connector has an insulative housing that is mounted on a circuit board. The insulative housing has a plurality of contacts with tines that extend through a bottom surface of the insulative housing for connection to the circuit board. A movable contact alignment member is positioned adjacent to the bottom surface of the housing and aligns the tines with the circuit board. The moveable contact alignment member is temporarily fixed to the insulative housing by latch arms and is urged into permanent fixture with the insulative housing by the circuit board when the insulative housing is mounted thereon. A shield member is attached to the insulative housing. The shield member has an extension portion configured to shield at least a portion of the tines that are exposed between the insulative housing and the movable contact alignment member.

The invention provides an insulation shielding composite film capable of storing heat and having high in safety. The film is formed by compositing an upper thermal-conducting and insulating polyimidefilm, a nano energy storage graphite sheet and a lower thermal-conducting and insulating polyimide film, the nano energy storage graphite sheet is coated between the upper thermal-conducting and insulating polyimide film and the lower thermal-conducting insulating polyimide film, the nano energy storage graphite sheet is respectively composited with the upper thermal-conducting and insulating polyimide film and the lower thermal-conducting and insulating polyimide film through an upper heat-conducting adhesive layer and a middle thermal-conducting adhesive layer, the nano energy storage graphite sheet is formed by compositing a conductive graphite sheet and a nanometer phase change material. The composite film has excellent thermal conductivity and insulating property, good shielding andheat storage functions, and can lower the temperature of the electronic equipment effectively and prolong the service life of the electronic equipment. Furthermore, the nano energy storage graphite sheet is located between the thermal-conducting and insulating polyimide films to form a 'sandwich' structure, and the safety of the composite film is improved. The composite film has characteristics ofbeing simple in structure and easy to use.

The present invention relates to colorless transparent anti-ultraviolet radiation glass, which is based on common sodium-calcium-silicate glass and supplemented with additives of nano ZnO and nano TiO2. The common sodium-calcium-silicate glass includes 64-75wt% of SiO2, 6-12wt% of CaO, 7-16wt% of Na2O, 3-6wt% of MgO, 1.5-3.5wt% of Al2O3, and 0-3wt% of B2O3. A production method is as follows: firstly, melting the raw materials of common glass; adding 0.3-1wt% of nano ZnO and 0.1-0.4wt% of nano TiO2 in the molten raw materials; evenly stirring nano ZnO, nano TiO2 and the molten raw materials; and then annealing the molten mixture, molding, polishing and grinding to obtain 4mm thick glass. The glass can shield more than 92% of the ultraviolet rays, and at the same time has better visible light transmissivity.

The invention discloses a thermosetting powder coating and a preparation method thereof. According to the invention, polyester resin, calcium carbonate, bentonite, zeolite powder, mica powder, a sodium modifying agent, aluminum oxide, solid acrylic resin, leveling agent, pigment and an antifoaming agent serve as raw materials and are reasonably proportioned. The components and the proportion are optimized, and all the components influence one another and are matched with one another, so that the prepared thermosetting powder coating has superstrong weather resistance.

The invention relates to the field of cable technology, and discloses a haul-off machine for cable filling rope processing, which includes a top plate, the bottom of the top plate is provided with a card slot, and the opposite side walls of the card slot are fixedly installed with a A clamping plate, the top of the clamping plate is provided with a connecting bearing located in the card groove, the top of the top plate is provided with a rotating shaft extending to the bottom of the connecting bearing, and the top of the rotating shaft is fixedly installed with a metal plate located above the top plate. The top of the plate is fixedly equipped with a rocker, the outer side of the rotating shaft is fitted with a reel located under the top plate, the outer side of the reel is wound with a cable, and the end of the rotating shaft away from the metal plate is fixedly installed with a bearing seat. The bottom of the cable is fixedly installed with a base plate, and the cable includes an outer sheath. The hauling machine used for processing cable stuffing ropes is easy to operate when pulling cables, reduces the labor intensity of workers, and is convenient for people to use.

The invention belongs to the technical field of heating materials, particularly relates to a heating wire with a shielding function and a heating pad with the same, and solves the problems that, for instance, the prior art design is unreasonable. The heating wire with the shielding function includes an aluminum wire, a Teflon layer, a copper wire layer and an insulating layer arranged sequentiallyfrom inside to outside; the copper wire layer is in spiral structure and wound on the Teflon layer; the Teflon layer is less than the insulating layer in thickness. The heating wire with the shielding function and the heating pad with the same have the advantages that the shielding function is provided and safety of use is better.