110results about How to "With heat conduction" patented technology

The invention discloses a preparation method of graphene-polyester nano-composite fiber. The preparation method comprises the step of preparing graphene-terylene polyester composite master batch and the step of preparing the graphene-polyester nano-composite fiber from the composite master batch. Compared with other conventional methods, the preparation method has the advantages that the technology is extremely simple, the reinforcing material is excellent in performance and low in cost; besides, excellent mechanical property and functional characteristics of graphene self endow the nano-composite fiber with functionalities like high strength and antistatic property, surface-modified and modified graphene has good dispersity and perfect interfacial compatibility in terylene polyester polymer matrix, which enables graphene to be effectively and uniformly compounded with a terylene polyester chip base material.

A nanometre-class polymer/laminated inorganic substance composite material features that it is prepared by use of the millstone-shaped force chemical reactor, which has a unique 3-D shear structure to provide strong squeeze-shear force field for grinding inserting, dispersing, and mixing to prepare the polymer/laminated inorganic substance composite powder, and then the said nanometre-class composite material is prepared by the universal processing method.

The invention relates to the technical field of plating films on the surface of organic polymers. The invention is realized through the following technical scheme that: the method for plating chromium on the surface of plastic materials sequentially comprises (1) a step for pretreatment; (2) a step for preparing a bottom plating layer; (3) a step for preparing a metallic chromium plating layer; (4) a step for preparing a surface plating layer; (5) inspection; and (6) packaging. The invention is suitable for the mechanical industry, transparent materials and other aspects.

The invention relates to a continuous carbon fiber-reinforced PA6 composite with high strength, high modulus, electrical conductivity and thermal conductivity, and a preparation method thereof. The composite comprises, by weight, (1) 100 parts of PA6 resin, (2) 0.2 to 1 part of an anti-oxidant, (3) 0.2 to 1.2 parts of a flow promoter, (4) 2 to 10 parts of a flexibilizer and (5) 1 to 5 parts of a compatilizer. The preparation method comprises the following steps: premixing the above components according to a certain ratio, carrying out melting and mixing via a double/single-screw set and then extruding the obtained mixture into a die head for flow splitting and impregnation so as to prepare the continuous carbon fiber-reinforced PA6 composite with high strength, high modulus, electrical conductivity and thermal conductivity. Compared with conventional staple carbon fiber-reinforced PA6 composites, the continuous carbon fiber-reinforced PA6 composite prepared by using a special impregnation process in the invention has greatly improved mechanical properties since the length retention rate of carbon fibers in a PA6 carrier is high or continuous and has substantially improved electrical conductivity and thermal conductivity due to a continuous network structure, so the application range of the composite is greatly broadened.

The invention provides a chip resistor. The chip resistor comprises a resistor sheet, an inner shell which wraps the surface of the resistor sheet, a heat sink bonded to the surface of the resistor sheet through an insulating thermal conductive adhesive, an outer shell at the outermost layer and electrode pins connected with the two ends of the resistor sheet and located outside the outer shell, and the inner shell is provided with a hollowed-out part for coating the insulating thermal conductive adhesive. A manufacturing method of the chip resistor includes the steps of blanking the resistorsheet and the electrode pins, then processing and connecting the resistor sheet and the electrode pins to form a resistor body, conducting rough adjustment and fine adjustment on a resistance value ofthe resistor body, packaging for the first time to form the inner shell, blanking the heat sink, bonding the heat sink to the resistor sheet through the insulating thermal conductive adhesive, packaging for the second time, cutting and bending the electrode pins to form a side U shape, and finally conducting post-processing to obtain the chip resistor. According to the chip resistor, after roughadjustment and fine adjustment are conducted on the resistance value of the resistor body, packaging is conducted for the first time, a layer of inner shell wraps the resistor body to ensure that theheat sink is not contact with the resistor sheet, and the obtained chip resistor has high precision, fast heat dissipation, long service life, safety and reliability, and high product yield.

The invention provides a material for manufacturing a powder metallurgy brake block of an electric locomotive. The brake block is a brake pad used for braking of the electric locomotive and comprises iron powder, copper powder, natural graphite, an additive and lubricant. The additive comprises molybdenum disulfide, silicon carbide and nickel powder. The lubricant comprises zinc stearate and kerosene. The electric locomotive brake block which is made of the material provided by the invention is resistant to heat, stable in friction coefficient under the high-load condition, small in attenuation and abrasion, good in heat conduction, capable of quickly conducting out the friction heat of the surface of a friction pair and good in physical, chemical and mechanical properties.

The present invention relates to spinning engineering, and is especially one kind of blended yarn with silver ion and its producing process. The blended silver ion yarn is produced through three times of merging, four times of mixing and other steps, and has certain silver ion content and high silver ion homogeneity. The blended silver ion yarn is used in weaving fabric containing blended silver ion fiber in 3-9 wt% and chemical fiber in 91-97 wt%, and the fabric has excellent wearability, and antistatic, bacteriostatic, deodorizing, heat conducting and radiation resisting functions.

The invention discloses a preparation method of an ultrahigh-conductivity carbon fiber composite wire for 3D printing. The formula comprises the following components: 60-70 parts of HKT800 carbon fiber, 60-64 parts of thermoplastic resin, 5-8 parts of boron trifluoride monoethylamine, 1-4 parts of AG80 epoxy resin, 1-3 parts of antioxidant, 2-5 parts of nanoparticle carrier type catalyst, 2-8 parts of color masterbatch and 4-10 parts of processing aid; and the preparation method comprises the following steps of: preparing the materials according to the formula, and mixing for 2-4min in a high-speed kneading machine; drying for 3-5h in a vacuum drum drying oven at 150 DEG C; and performing extrusion, strip casting, drafting and rolling through a twin-screw extruder to obtain 3D printing carbon fiber composite wires different in wire diameter. The material printed by the 3D printing carbon fiber composite wire has the characteristics of high-temperature resistance, friction resistance, heat conductivity, corrosion resistance and ultrahigh conductivity; the preparation technology is simple and feasible while the cost is low.

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 discloses superhydrophilic anticorrosion coating sol, made by combining inorganic polysilazane and graphene, and a preparation method and application thereof. Graphene and inorganic polysilazane are combined to obtain coating sol having self-curing property and strong adhesion; and a coating prepared has good corrosion resistance and stable superhydrophilicity, as well as the characteristics, such as heat conductivity, high mechanical strength, and flame retardancy. The preparation method is simple, low in cost and green, the operating conditions are easy to control, the problemsare effectively solved that existing coatings have poor corrosion resistance and the preparation techniques are complex, and the application and development of superhydrophilic anticorrosion technology are benefited.

The invention belongs to the technical field of camera brake devices, in particular to a split-type low-power-consumption small automatic focusing brake device. The split-type low-power-consumption small automatic focusing brake device includes a shell, a spring, a picture sensor carrier, at least one magnet, at least one independent coil and an elastic circuit board; the spring, the picture sensor carrier and the elastic circuit board form a spring vibrator system which has uniaxial displacement freedom degrees, the magnets are arranged on the inner wall of the shell, the independent coils are arranged on the picture sensor carrier and correspond to the magnets, and after being powered on, the independent coils are affected by ampere force in magnetic fields of the magnets. The structureof the split-type low-power-consumption small automatic focusing brake device cannot generate non-linear friction and has the advantages of being good in dust-prevention and heat-dissipation effect.

The invention relates to a metal bipolar plate and a preparation method thereof and a fuel cell, and relates to the technical field of fuel cells. The main adopted technical scheme is that the metal bipolar plate comprises a metal substrate, a Cu nano layer, a graphene layer and an amorphous carbon film. The Cu nano layer is deposited on the metal substrate, the graphene layer is prepared on the Cu nano layer and the amorphous carbon film is deposited on the graphene layer. The fuel cell includes the metal bipolar plate. The metal bipolar plate is mainly used for improving the corrosion resistance and the electrical conductivity of the metal bipolar plate and improving the bonding force between the coating and the metal substrate, thus prolonging the service life of the metal bipolar plateand the fuel cell.

The invention relates to a high-elasticity epoxy resin which mainly comprises an epoxy resin and an elastic curing agent. The high-elasticity epoxy resin is characterized by comprising the following components in parts by weight: 420-480 parts of epoxy resin, 20-80 parts of flame retardant agent, 25-40 parts of quadrol, 8-47 parts of accelerant, 3-26parts of binding agent, 11-32 parts of diluent and 0-17 parts of temperature resistant toughening agent. Because the high-elasticity epoxy resin adopted as an electronic potting material has the characteristics of elasticity, vibration prevention, moisture prevention, temperature resistance, heat conduction, flame retardance, electric insulation, and the like, the high-elasticity epoxy resin can ensure the long-term reliability of electronic products. The high-elasticity epoxy resin has the advantages of silicon rubber, can maintain the characteristics of the epoxy resin, has reduced cost and widely expanded application range and adds a novel potting material for the electronic industry.

The invention relates to a polylactic acid 3D printing material and a preparation method and an application thereof. The polylactic acid 3D printing material consists of the following components in parts by mass: 30-90 parts of polylactic acid, 10-30 parts of nitrogen-doped graphene, 0.5-3 parts of an antioxidant, 3-7 parts of a dispersant, and 0.1-1 part of a nucleating agent, wherein the molecular weight of the polylactic acid is 40000-100000. The polylactic acid 3D printing material provided by the invention has the advantages of low density, thermal conductivity and electrical conductivity, and can meet the market demand for FDM special consumable materials with high thermal conductivity, electrical conductivity and low specific gravity.

The invention relates to a low-density heat-conducting and conductive polylactic acid 3D printed material as well as a preparation method and application thereof. The polylactic acid 3D printed material is prepared from the following components in parts by weight: 30-90 parts of polylactic acid, 20-50 parts of metalized hollow glass microspheres, 0.5-3 parts of an antioxidant, 3-7 parts of a dispersing agent and 0.1-1 part of a nucleating agent, wherein the molecular weight of the polylactic acid is 20,000-150,000; the density of the metalized hollow glass microspheres is 0.05-0.5g/cm<3>, the particle sizes are 5-100 microns and the spherical rate of the metalized hollow glass microspheres is greater than 90%. Various raw materials are mixed and added to a single-screw extruder to be extruded and pelletized to obtain the low-density heat-conducting and conductive polylactic acid 3D printed material. The polylactic acid 3D printed material has low density, heat-conducting property and conductivity, and can meet the requirements of the market on a special FDM material with high heat-conducting property and conductivity and low specific gravity.

The invention relates to an organic polymer with a coated surface, in particular relating to coated polycarbonate. The invention is realized by the following technical scheme: the coated polycarbonate comprises a polycarbonate substrate layer and a coating layer, and the coating layer consists of a titanium oxide bottom coating layer, a chrome coating layer and a titanium oxide surface coating layer. The invention is applicable to various aspects like mechanical industry and transparent materials.

The invention relates to a slimming and breast-shaping suit with a bra. The slimming and breast-shaping suit comprises a first area, a second area, a third area and a fourth area, wherein the first area is an area from the shoulders to a position below the breasts, the second area is a waist and abdomen area, the third area is a lower body area, and the fourth area is a back area; the breast partof the first area is made of double-layer fabric, and breathable cups are arranged between the inner fabric and the outer fabric; the abdomen area is provided with energy stones capable of conditioning the abdomen; the crotch position of the third area is provided with a hole to facilitate urination. The slimming and breast-shaping suit has the advantages that the detachable cups are added to theone-piece body-shaping suit to allow the body-shaping suit to also have a bra function, and convenience and comfortableness are achieved; the cups are detachable, so that the breasts of women can be freed from constraint and be natural and healthy while the cups can be replaced according to different functions, use flexibility is also achieved, and the overall shaping effect of the body-shaping suit is outstanding.

The invention discloses a protection film for a high-power concentrating photovoltaic system receiver. The protection film is an Al2O3 film and is arranged on the outer layer of the receiver by the atomic layer deposition technology. The receiver comprises a copper-coated ceramic panel, a solar cell, a Shaw Schottky diode, gold threads and the like. The protection film coats on the outer surface of all components contacting with the air. The Al2O3 film is produced by the ALD (atomic layer deposition) technology is arranged on the upper surface of the receiver and coats on components and circuits on the surface of the receiver. According to the protection film, effects of insulation, water proofing, oxidation resistance and thermal conductivity can be achieved by adjusting parameters of different precursor acting time, air pressure, thickness and the like during Al2O3 film production, and the protection film of the receiver is an ideal one.

The invention discloses a novel light energy absorption and vibration reduction imitation microstructure and a preparation method thereof. The novel light energy absorption and vibration reduction imitation microstructure comprises a plurality of energy absorption layers which are sequentially stacked from top to bottom, each energy absorption layer comprises a plurality of energy absorption frames, and a metal rubber ball is embedded in each energy absorption frame. According to the preparation method, by reference to the mechanism for improving elastic modulus and the strength that a diamondmicro-octahedral structure is filled with an interstitial atom, the micro-new composite structure of filling a NiTi-based octahedral interstice of 3D printing with a NiTi metal rubber ball is proposed, and the elastic modulus, the strength and energy absorption efficiency of a structural part can be improved; compared with a traditional metal rubber, the structure has the advantages of radiationresistance, corrosion resistance, high and low temperature resistance, aging resistance and the like; compared with the traditional metal rubber, the structure has the advantages of high forming precision, being capable of forming a complex structure, high energy absorption efficiency and the like; and compared with a simple NiTi metal-based octahedral lattice structure, the structure has the advantages of high strength, high modulus, high energy absorption efficiency and the like.

The invention discloses a low-density and high-strength heat-conducting silica gel gasket. The low-density and high-strength heat-conducting silica gel gasket comprises the following components in percent by weight: 5-25% of an organosilicon polymer, 50-85% of heat-conducting powder and 10-25% of an auxiliary agent. The low-density and high-strength heat-conducting silica gel gasket, as a filling material product, has the characteristics of heat conductivity, low density and high tensile strength at the same time, so that the problem that some terminals need these unique compatible characteristics on special occasions is solved; the low-density and high-strength heat-conducting silica gel gasket has all general characteristics of ordinary heat-conducting gaskets, and is simple and easy to prepare, safe and reliable.