10results about How to "Relative density is small" patented technology

The invention discloses a modified ceramic flame-retardant polyphenyl ether insulated wire and cable material which is prepared from the following raw materials in percentage by mass: 15%-20% of polyphenyl ether resin, 10%-20% of SEBS thermoplastic elastomer, 4%-8% of polypropylene resin, 3%-8% of maleic anhydride grafted material, 5%-20% of melamine cyanurate, 5%-15% of aluminum diethylhypophosphite, 1%-4% of 2, 3-dimethyl-2, 3-diphenyl butane, 10%-30% of compound ceramic powder and 1%-4% of antioxidant. The insulated wire and cable material disclosed by the invention has outstanding electrical insulativity, flowability and water resistance, relatively good wear resistance and electrical performance, good dimensional stability and relatively high heat resistance; the flame-retardant property is good, and the self-extinguishing property is realized; and the ceramic forming property after high-temperature combustion is excellent, and the ceramic still has excellent insulating property after being formed.

The present invention discloses a novel sandwich structure automobile front anti-collision beam and assembly, the anti-collision beam comprises a tubular aluminum alloy shell, the shell is provided with aluminum foam, two-layer lattice structure and honeycomb structure inside, the honeycomb structure is filled between the two-layer lattice structure, the two-layer lattice structure comprises a first lattice structure arranged on a side away from the automobile, the first lattice structure comprises a plurality of interconnected first unit cells in the shape of a structure, and the aluminum foam is filled in the gap between the two-layer lattice structure and the inner wall of the shell. The present invention has the advantages of absorbing impact energy, reducing impact peak force and being conducive to achieving lightweight of automobiles.

The invention relates to the technical field of coal bed gas impurity removal equipment, in particular to a coal bed gas impurity removal device which comprises a removal supporting table, the top of the removal supporting table is fixedly connected with a removal box, and the side wall of the removal box is fixedly connected with a gas inlet pipe. Unfiltered coal bed gas enters from the gas inlet pipe, due to the fact that the coal bed gas is small in relative density, lighter than air and prone to flowing to the high position, the coal bed gas penetrates through the screening baffle and drives impurities to pass through the screening baffle, the screening baffle filters the impurities of the coal bed gas, the water pump sucks water at the bottom into the water spraying pipe, and water flows through the spiral rotating plate; a spiral rotating plate rotates to increase the pressure intensity of water, water flow enters a rotating round box through a connecting pipe, centrifugal force is facilitated, the flow speed of the water flow is increased, an arc-shaped guide plate guides the water flow, the water can be sprayed out through an atomizing nozzle through the pressure intensity and the centrifugal force, and impurities filtered in a screening baffle are continuously impacted and separated from the inner wall.

The present application relates to the technical field of electrophoretic particles, more particularly to an electrophoretic particle, a preparation method therefor, and an application thereof. Provided is an electrophoretic particle. The electrophoretic particle includes a shell layer and a core layer, which is wrapped in the shell layer. The core layer includes a plurality of core particles, and the density of the core particles is lower than a density of the shell layer. The electrophoretic particle includes the shell layer and the core layer wrapped in the shell layer, the core layer includes the plurality of core particles, and the structure of the plurality of the core particles makes the shell layer wrapping on surfaces of the plurality of the core particles form a folded structure, thus increasing a surface area of the core layer and improving the bonding tightness between the shell layer and the core layer, and making the shell layer of the resulting electrophoretic particle have relatively strong tightness. Based on this, an overall particle size of each electrophoretic particle can be appropriately reduced, the moving velocity of the electrophoretic particle under the action of the electric field can be improved, and it is ensured such electrophoretic particle will never have the light leakage problem, thereby improving the excellent performance of a device.

The present invention provides a metamaterial energy absorption structure based on Boolean operation, including an energy absorption box, the energy absorption box is composed of a plurality of metamaterial structures; the metamaterial structure is composed of a plurality of metamaterial monomers; a thin spherical shell is placed inside a regular polygonal prism, the vertical distance between the center of the regular polygonal prism and each side surface and bottom surface of the regular polygonal prism is less than the radius of the thin spherical shell; the thin spherical shell and the regular polygonal prism are subjected to Boolean operation, that is: the thin spherical shell is placed inside the regular polygonal prism, and the part overflowing from each side surface and bottom surface of the regular polygonal prism is the overflow part, and the thin spherical shell removes the overflow part to obtain the metamaterial monomer. The application of this technical solution can realize lightweight protection and efficient energy absorption of the energy absorption box.

Provided is a solar panel. The solar panel includes a rigid frame and a cell. The rigid frame has an accommodation opening. The cell is disposed at the accommodation opening.

The present invention relates to the field of 3D printing technology, and in particular to an artificial joint coating structure. The coating body is a three-dimensional mesh structure, which includes nodes and mesh wires connected between adjacent nodes; the three-dimensional mesh structure is composed of a plurality of interconnected units, and the outer contour of the unit is a six-sided frame structure, which includes 12 edges and 8 vertices, and the mesh wires include outer mesh wires formed by the edges of the unit body, and the nodes include outer nodes formed by the vertices of the unit body, and the outer nodes and outer mesh wires of the corresponding faces of adjacent units overlap. The present invention also discloses an artificial joint. The beneficial effects of the present invention are: the obtained coating structure has a uniform structure at the macroscopic level, structural differences at the microscopic level, a porosity similar to that of real human bones, high strength, and good integration with human tissues; the modeling method of the present invention is convenient for formation using metal laser 3D printing.

The invention belongs to the technical field of silicone sealants, and particularly discloses an environment-friendly single-component flame-retardant high-elasticity sealant and a preparation method thereof. The environment-friendly single-component flame-retardant high-elasticity sealant provided by the invention comprises the following components in parts by mass: 50 parts of alpha, omega-dihydroxy polydimethylsiloxane; 30-60 parts of activated calcium carbonate; 30 to 80 parts of a prefabricated silica gel composition; 4-10 parts of a cross-linking agent; 2-8 parts of a catalyst; and 0.2 to 2 parts of a coupling agent. The environment-friendly single-component flame-retardant high-elasticity sealant provided by the invention has the advantages of relatively low density, good mechanical strength, good extrudability, high elastic expansion and contraction rate and excellent flame-retardant and adhesive properties.

This invention belongs to the field of inorganic nanoparticle preparation technology, and relates to a ball milling modification method for bifunctionalized thin-layer hexagonal boron nitride: Hexagonal boron nitride powder, guanidine hydrochloride, and urea are continuously heated and stirred to obtain a homogeneous mixture of a eutectic solvent formed by guanidine hydrochloride and urea and the hexagonal boron nitride powder; this mixture is poured into a ball mill jar containing grinding balls and a liner, and a certain amount of ethanol and water are added as dispersants for high-energy ball milling; after the material is separated from the grinding balls, the milled material is vacuum filtered, dried, and the resulting powder is dispersed in water, then ultrasonicated, allowed to stand, vacuum filtered, and dried to obtain bifunctionalized thin-layer hexagonal boron nitride. This invention not only has the advantages of readily available raw materials and simple process, but also high efficiency, environmental friendliness, and low energy consumption. The hexagonal boron nitride obtained by this method has thinner layers, good biocompatibility, low relative density, and good thermal conductivity.

The invention relates to a novel preparation method of cicada slough cough-relieving granules, which comprises the following steps: taking cicada slough, scutellaria baicalensis, lumbricus, aster tataricus, stemona and myrobalan, adding ethanol, performing reflux extraction, filtering, concentrating filtrate, and merging concentrated solutions to obtain an alcohol extract and decoction dregs II; combining the medicine residue II with the medicine residue I of schizonepeta, residual liquid and stiff silkworm, adding water, decocting, filtering, concentrating filtrate under reduced pressure, and combining concentrated solutions to obtain a water extract; and mixing the alcohol extract and the water extract, and concentrating to obtain the cicada slough cough-relieving granule extract. And carrying out one-step granulation and drying on the cicada slough cough-relieving granule extract, sieving and finishing granules, and totally mixing to obtain the cicada slough cough-relieving granules. According to the method, multiple processes of mixing, spraying, forming, drying and the like are completed in one device, circulation of products among different devices is reduced, the risk of introducing microorganisms is reduced, the preparation time is shortened, the transfer rate of the index component baicalin is obviously increased, operation is easy, the yield of finished products is increased, and the method is suitable for industrial production.