80results about How to "Electrically insulating" patented technology

The invention relates to an optical fiber type two-dimensional wind speed / direction measuring device belonging to the technical field of wind speed / direction measurement, digital image processing, and the like. The optical fiber type two-dimensional wind speed / direction measuring device comprises a base plate, an upper plate and a point light source, wherein the upper plate is parallel to the base plate; the point light source is fixed on the upper plate and is connected to the beginning end of optical fiber; the upper plate is provided with a hole for being penetrated by the optical fiber and fixing the optical fiber; the optical fiber is divided into two parts, one part from the point light source to the upper part is used for leading in the point light source, and a vertical part from the upper plate to bottom is an air flow sensing part; the tail end of the optical fiber is fixed with a camera; the camera comprises a microspur lens group and an area-array photosensitive device; light spots sent by the point light source pass through the optical fiber and then project on the camera; an image acquired by the camera is sent to an image processing and computing unit; and the image processing and computing unit computes wind speed and wind direction according to the light spot image. The invention also provides a two-dimensional wind speed / direction measuring method realized by the optical fiber type two-dimensional wind speed / direction measuring device. The invention has the advantages of simple structure, low cost, little power consumption, high sensitivity, moderate volume, and the like.

The invention provides a solder resist composition and a printed circuit board, concretely a solder resist composition with high reflectivity and high resolution capable of preventing the reflectivity from being reduced due to discoloration deterioration and a printed circuit board obtained by forming a solder film using the solder resist composition. The solder resist composition comprises: (A) carboxyl-containing resin without aromatic ring; (B) bi-acyl phosphine oxide type light polymerization initiator; (C) monoacyl phophine oxide type light polymerization initiator; (D) light polymerization monomer; (E) rutile type titanium oxide; (F) epoxide; (G) organic solvent; and (H) antioxidant.

The invention relates to a high-intensity electromagnetic shielding material for a new energy electric vehicle and a preparation method thereof. A symmetric multi-layered structure comprises an electromagnetic wave impedance matching layer located on the outermost layer, a wave absorbing layer located on the secondary outer layer and a reflective layer of a three-layer structure located in the middle, wherein the electromagnetic wave impedance matching layer comprises a glass fiber cloth with a layer of magnetic medium wave absorbing filler A modified polymer solution sprayed or brushed on thesurface; the wave absorbing layer comprises a glass fiber cloth with a layer of composite modified polymer solution of a magnetic medium wave absorbing filler A and a conductive wave absorbing fillerB sprayed or brushed on the surface; the reflective layer comprises a c11 layer formed by spraying or brushing a layer of conductive filler C modified polymer solution on the surface of a carbon fiber cloth, a c12 layer formed by spraying or brushing a layer of conductive filler C modified polymer solution on the surface of a carbon fiber felt, and a c13 layer formed by spraying or brushing a layer of conductive filler C modified polymer solution on the surface of the carbon fiber cloth; and the c12 layer is located between the c11 layer and the c13 layer, which solves the defects in the prior art as well as meets the electromagnetic shielding effectiveness and mechanical performance requirements of the material.

The invention discloses environment-friendly type ocean anticorrosive paint applicable to large ships. The environment-friendly type ocean anticorrosive paint is prepared from the following componentsin percentage by weight: 15 to 25 percent of epoxy resin, 5 to 8 percent of ultrafine barium sulfate, 8 to 12 percent of light calcium carbonate, 1 to 3 percent of a thixotropic agent, 5 to 10 percent of a curing agent, 0.1 to 0.2 percent of a film-forming catalyst, 1 to 3 percent of an alga removing agent, 1 to 2 percent of a dispersant, 25 to 35 percent of amine type resin, 0.05 to 0.1 percentof nano silicon dioxide, 5 to 8 percent of toner and the balance of silicon micro-powder. According to the paint disclosed by the invention, a small amount of the film-forming catalyst lanthanum oxideis added; under the catalysis effect, the strength and impermeability performance of a formed film are remarkably improved; the surface strength and anti-chloride ion permeability performance of thepaint are enhanced; the nano silicon dioxide is highly bound to the surface of the film, so that a nano-grade gap of the film is easy to fill and the strength of the film is enhanced.

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

The invention discloses a heat insulation-type cable, which comprises a cable core. An inner sheath and an outer sheath are extruded outside the cable core; the cable core is composed of a triangular support, three insulated wire cores mutually extruded inside the triangular support and ground wires located at three vertex angles of the triangular support; a ceramic fiber is arranged between the triangular support and the inner sheath; and an elastic buffer layer with a thickness of 2 to 5 mm, a metal armored layer with a thickness of 2 to 4 mm and a rock wool heat insulation layer with a thickness of 3 to 6 mm are sequentially arranged between the inner sheath and the outer sheath. Through arranging multiple heat insulation structures, the cable of the invention has the advantages of good heat insulation performance, high temperature resistance, good heat stability, low heat conductivity and the like.

A membrane electrode assembly (16) of a fuel cell (10) includes a solid polymer electrolyte membrane (50), a cathode (52), and an anode (54). The surface size of a cathode side electrode catalyst layer (52b) of the cathode (52) is smaller than the surface size of an anode side electrode catalyst layer (54b) of the anode (54). An inner end (56a) of a gas impermeable film (56) provided around the anode side electrode catalyst layer (54b) and an outer end (52be) of a cathode side electrode catalyst layer (52b) are overlapped with each other on both sides of the solid polymer electrolyte membrane (50).

The invention discloses a preparation method for enhancing interface performance of basalt. Firstly, a PAN-basalt nano-coated fiber is prepared by using the electrospinning technology; then the prepared PAN-basalt nano-coated fiber is carbonized to obtain a core-structured basalt carbonized nano-material with enhanced interface performance; finally the prepared core-structured basalt carbonized nano-material and resin matrix are solidified to form a composite with enhanced interface performance. The composite has the advantages of a large surface area, relatively high electrical conductivity,complete structure and good absorption performance of a cortical carbon nano-material, excellent mechanical properties of a core layer basalt fiber, and can simultaneously exert the advantages of thetwo materials. The preparation method for enhancing the interface performance of the basalt has the advantages that less pollution to environment is generated, can be widely applied to the field of fiber reinforcement materials, and solves the problem of poor interfacial adhesion of the basalt fiber reinforced resin matrix composites in the prior art, further optimizes the performance of the composites, and can promote design of the new fiber composites, which facilitates better application and development.

The invention discloses a crosslinked polyethylene insulated multi-core flame retardant cable, which comprises a cable core. The gap of the cable core is provided with an inorganic mineral oxygen barrier layer; the cable core is wrapped with a first polyester tape; a semi-conductive shielding layer is extruded outside the polyester tape; a steel strip armored layer is arranged outside the inner semi-conductive shielding layer; a rock wool heat insulation layer is extruded outside the steel strip armored layer; and the outermost layer of the cable is provided with a silica fireproof sleeve; the cable core is formed by stranding a ground wire and two insulated wire cores arranged symmetrically with the ground wire as an axial center in a horizontal mode; and the cable core is internally provided with a group of through holes symmetrically with the ground wire as the axial center. The crosslinked polyethylene insulated multi-core flame retardant cable has the advantages of good flame retardancy, high temperature resistance, good cooling performance, fire resistance, good insulated performance and the like.

The invention discloses a halogen-free phosphorus-free flame-retardant thermoplastic alloy and a preparation method thereof. The halogen-free phosphorus-free flame-retardant thermoplastic alloy is prepared from the following components in parts by weight: 50 to 70 parts of polyolefin, 25 to 40 parts of a thermoplastic elastomer, 5 to 10 parts of a compatilizer, 30 to 50 parts of calcium gluconate,10 to 15 parts of melamine cyanuric acid, 5 to 10 parts of hydrotalcite, 3 to 5 parts of zinc stannate, 0.1 to 0.5 part of an antioxidant and 3 to 5 parts of a silicone lubricant. According to the invention, the thermoplastic alloy is prepared by adding calcium gluconate; after combustion of calcium gluconate, calcium carbonate and carbon dioxide are produced, calcium carbonate can rapidly expandto form porous calcium carbonate under the action of carbon dioxide, the good flame-retardant synergistic effect is achieved, the high mechanical property and the high flame-retardant effect of the thermoplastic alloy are ensured, meanwhile, the smoke generation amount can be reduced, emission of toxic substances is effectively reduced, the environment is protected, and the mechanical property and the chemical property of the alloy are not affected.

The invention discloses a refractory material for a building wall and a preparation method thereof. The refractory material is prepared from the following components in parts by weight: 6 to 10 parts of cement, 3 to 6 parts of quick lime, 1 to 4 parts of silica gel powder, 3 to 8 parts of coal-ash powder, 2 to 6 parts of cellulose ether, 1 to 4 parts of a hydrophobic agent, 1 to 5 parts of short-cut fiber and 18 to 35 parts of water. The preparation method comprises the following steps: adding cement, quick lime, silica gel powder and coal-ash powder according to the above-mentioned parts by weight into a stirrer, carrying out mixing under stirring for 6 to 8 minutes so as to obtain a mixed material, then adding cellulose ether, the hydrophobic agent and the short-cut fiber into the mixed material, carrying out stirring for 4 to 8 minutes, adding water, and carrying out stirring for 15 to 35 minutes so as to be able to obtain the refractory material for use. The refractory material provided by the invention has the advantages of good toughness, excellent fire resistance, etc.

A treatment instrument configured to treat living tissue by applying energy includes: first and second holding members; a swing member supported by the first holding member and being rotatable in a first direction and in a second direction opposite to the first direction on a rotation axis as a supporting point; a limiting portion which limits rotation of the swing member in one of the first and second directions; a first holding surface provided on the side of the swing member close to the second holding member and configured to hold living tissue; a second holding surface provided on the side of the second holding member close to the swing member and cooperating with the first holding surface of the swing member to hold the living tissue; and a protrusion forming a clearance between the first and second holding surfaces when the first and second holding surfaces are relatively closed.