139results about How to "Thermally conductive" patented technology

The invention discloses a polyamide composite material. The polyamide composite material comprises the following components in percentage by weight: 30%-80% of polyamide, 10%-50% of glass fiber, 5%-30% of heat-conducting filler, 0.1%-2% of a heat stabilizer and 0.1%-0.5% of a lubricant. A special screw assembly design on a twin-screw extruder is adopted, so that the powder can be well dispersed without adding a coupling agent, and the comprehensive performances are still better. In the composite material, the nanometer heat conducting filler is added, so that the heat conducting performance of the composite material is improved under the condition that the mechanical performance is not reduced, the using temperature of the composite material is increased to 180 DEG C and the service life of the composite material is prolonged.

The invention discloses a plurality of different types of thermal expansion fluid composite non-special-shaped cavity driven type robot soft hands. All the robot soft hands comprise a plurality of thermal expansion fluid composite non-special-shaped cavity driven type robot soft fingers and thermal expansion fluid composite non-special-shaped cavity driven type robot palms, wherein the thermal expansion fluid composite non-special cavity driving type robot soft fingers adopt a thermal expansion fluid and shape memory alloy composite non-special-shaped cavity single-side driver, a thermal expansion fluid and an electric control heating material composite non-special-shaped cavity single-side driver, a thermal expansion fluid and shape memory alloy composite non-special-shaped cavity double-side driver, a thermal expansion fluid and electric control heating material composite non-special-shaped cavity double-side driver. According to the thermal expansion fluid composite non-special cavity driven type robot soft hands, the thermal expansion fluid composite non-special-shaped cavity is adopted, a thermal expansion fluid control valve to regulate the one-way flow of partial substancesin the thermal expansion fluid is combined, and the rigidity of the gripped article of the finger of the soft body can be improved.

The invention discloses heat conducting polyamide composite material and preparation method thereof, falling into the technical field of high polymer composite material. The heat conducting polyamide composite material is composed of PA resin 20-40, heat conducting filling 58.2-77.4, antioxidant 0.2-0.3, coupling agent 0.5-0.7, liquid assistant 0.5-0.7, lubricant 0.2-0.4, and processing assistant 0.3-0.6 parts by weight. The method includes mixing the coupling agent 0.5-0.7 parts and liquid assistant 0.5-0.7 parts, adding into dry heat conducting filling 58.2-77.4 parts, stirring for 30 min via a high-speed mixing machine, and drying for 3 h at 100 DEG C. for use; placing PA resin 20-40 parts, antioxidant 0.2-0.3 parts, lubricant 0.2-0.4 parts, processing assistant 0.3-0.6 parts and the mixture obtained from the first step into a high-speed mixing machine, stirring for 15 min, and performing extrusion and granulation via an extruding machine. The composite material has heat conducting property, low density, good processability, and low cost.

The invention provides an organic silicon pouring sealant with a low dielectric constant. The invention belongs to the technical field of organosilicon pouring sealants. The organic silicon pouring sealant comprises a component A and a component B. The component A comprises, by weight, 10-40 parts of vinyl silicone oil, 1-10 parts of a diluent, 0-20 parts of a heat conduction filler, 10-60 parts of a low dielectric material, and 0.1-2.0 parts of a catalyst. The component B comprises, in parts by weight: 10 to 40 parts of vinyl silicone oil, 5 to 30 parts of a cross-linking agent, 0 to 20 partsof a heat conduction filler, 10 to 60 parts of a low dielectric material and 0.1 to 1.0 part of an inhibitor; the preparation method comprises the following steps: carrying out organic treatment on alow-dielectric material, stirring in a reaction kettle, cooling, stirring again, cooling again to obtain the finished product A and the finished product B, and uniformly mixing the prepared finishedproduct A and the finished product B according to the mass ratio of 1: 1 for later use. The phase change pouring sealant can solve the problem that a porous material containing air is unstable in an organic silicon system, the organic silicon pouring sealant is stable in storage, the dielectric constant is lower than 3.0 (1MHz), and heat conduction and viscosity are moderate.

The invention discloses a multilayer printed circuit board structure which is obtained through successively stacking the components of: an aluminum foil base layer, a first prepreg, an aluminum foil middle layer, a second prepreg and a copper foil surface layer, wherein the first prepreg and the second prepreg are respectively prepared through dipping fiber cloth into a heat-conductive material, so that the heat-conductive material can be filled in the gaps of the fiber cloth, wherein the heat-conductive material is prepared through mixing a resin and a filler at least. According to the multilayer printed circuit board structure, through stacking and combining the aluminum foil base layer, the first prepreg, the aluminum foil middle layer, the second prepreg and the copper foil surface layer, and through the resin component contained in the first prepreg and the second prepreg, the multilayer printed circuit board structure can possess the advantages of: high heat conductivity, low moisture absorption property, high heat resistance, high melting point, low dielectric constant, low dielectric loss coefficient, no easy board delamination, etc.

The invention relates to the technical field of ceramic matrix composite preparation, and in particular to a preparation method for an Al-Ti-C system reaction cored wire. The method includes the steps that firstly, titanium powder is wetly ground in an organic solvent medium (absolute ethyl alcohol or acetone), a sucrose solution is added, and therefore a mixed material is generated; secondly, the mixed material is evenly stirred and then dried and placed in a vacuum heat treatment furnace so as to be heated, sucrose is carbonized, and a Ti-C mixed system is formed; thirdly, the carbonized mixed material is crushed, Ti-C composite powder with the proper grain diameter is obtained through screening and serves as a cored material; fourthly, an aluminum belt serves as a skin material, the Ti-C composite powder serves as the cored material, and a multi-stage continuous wire-drawing diameter-reducing method is adopted for preparing the Al-Ti-C cored wire. The method is characterized in that the skin material and the cored wire are both components of the reaction system, the Al-Ti-C reaction system is formed and generates a self-propagating high-temperature synthesis (SHS) reaction in the spraying process, a Ti2AlC-base ceramic coating is synthesized in situ, low-cost raw materials can be used, and a composite ceramic coating with the high performance can be acquired through the SHS reaction.

The invention relates to the technical field of adhesives, and discloses a graphite-based high-strength heat-conducting epoxy resin adhesive and a preparation method thereof. The adhesive comprises the following components in parts by weight: bisphenol A type epoxy resin, calcium carbonate, modified graphite, composite glass fibers, 1, 4-butanediol diglycidyl ether, a curing agent polydiphenyl substituted cetane dicarboxylic anhydride, a curing accelerator pyridine and absolute ethyl alcohol. The preparation method comprises the following steps: performing ultrasonic oscillation dispersion onmodified graphite to obtain a graphite suspension; adding bisphenol A epoxy resin, calcium carbonate, composite glass fibers and 1, 4-butanediol diglycidyl ether into the graphite suspension, and uniformly mixing to obtain a premix; and adding polydiphenyl substituted hexadecane dicarboxylic anhydride and pyridine into the premix, pouring into a metal mold, and standing while keeping the temperature, thereby obtaining the graphite-based high-strength heat-conducting epoxy resin adhesive. The adhesive prepared by the method has high mechanical strength and excellent heat-conducting property, and the application range of the epoxy resin adhesive is expanded.

The invention relates to a heat conducting nylon composite material and a preparation method thereof. The heat conducting nylon composite material comprises nylon and heat conducting fillers, wherein the heat conducting fillers include magnesium hydroxide A and magnesium hydroxide B; the grain size of magnesium hydroxide A is 200-1500 meshes; and the grain size of magnesium hydroxide B is 5000-12000 meshes. The heat conducting nylon composite material and the preparation method have the advantages that as two kinds of magnesium hydroxide with different grain sizes are compounded and adopted as the heat conducting fillers of the heat conducting nylon composite material, large-size magnesium hydroxide grains form a heat conducting network while small-size magnesium hydroxide grains fill the space among large-size magnesium hydroxide, thus finely filling the heat conducting network and being beneficial to improving the heat conductivity of plastics; besides, magnesium hydroxide belongs to a halogen-free flame retardant, so that nylon is endowed with certain flame retardance while the heat conductivity of nylon is improved after magnesium hydroxide is added to nylon.

The invention relates to a shank hot compress plate for patients, and especially relates to a shank hot compress plate for orthopedic patients. The technical problem to be solved is to provide an orthopedic patient calf hot compress board which is simple in operation, can be massaged and hot compressed by the patient himself, and saves labor. The technical scheme of the invention is as follows: the orthopedic patient calf hot compress plate comprises a leg guard plate, a hot compress plate, a first connecting block, a fixing belt, an opening round rod, a fixing block, a first guide sleeve, a first guide rod and the like; A leg guard plate is arrange at that bottom of the leg mold, a hot compress plate is arranged at the top of the leg mold, a first connecting block is arranged on the leftand right sides of the front and back sides of the leg guard plate, and a fixing belt is arranged on the top of the first connecting block. The shank hot compress plate can adjust the device accordingto the difference of the individual leg type and fix the device on the patient's leg through the cooperation of the open round bar and the first guide bar. By injecting hot water into the water injection chamber, the calf region of the patient can be hot compressed; With a rotary handle, the patient can press the calf repeatedly.

The invention discloses several different thermal expansion fluid composite spherically-shaped cavity drive type robot soft hands. Each thermal expansion fluid composite spherically-shaped cavity drive type robot soft hand comprises a plurality of thermal expansion fluid composite spherically-shaped cavity drive type robot soft fingers and a thermal expansion fluid composite spherically-shaped cavity drive type robot soft palm, wherein the thermal expansion fluid composite spherically-shaped cavity drive type robot soft fingers adopts a thermal expansion fluid and shape memory alloy compositespecially-shaped cavity single-side driver, a thermal expansion fluid and electric-control heating material composite specially-shaped cavity single-side driver, a thermal expansion fluid and shape memory alloy composite specially-shaped cavity dual-side driver, and a thermal expansion fluid and electric-control material composite specially-shaped cavity dual-side driver. Thermal expansion deformation drive of the thermal expansion fluid composite specially-shaped cavity and deformation drive of the shape memory alloy are combined, so that the thermal expansion fluid composite spherically-shaped cavity drive type robot soft hand has the strengthening effect of cooperative superposing and dual-driving.

The invention relates to a carbon fiber electric heating plate which is characterized in that a carbon fiber heating cable is arranged in a mounting groove; the carbon fiber heating cable adopts the bending design; a heat conduction layer is arranged in a bent gap; an outer protection layer of the carbon fiber electric heating plate is an aluminium magnesium alloy frame body; the carbon fiber heating cable is connected with a power supply by an electric contact; and an insulating layer and a heat dissipating plate are respectively laid at the upper and lower parts of the carbon fiber heating cable. The carbon fiber electric heating plate has the beneficial effects that the carbon fiber heating cable is used as a heating source; the carbon fiber heating cable has double heat conduction effects of heat conduction and thermal radiation; the carbon fiber electric heating plate has high electrothermal conversion efficiency; electric energy is saved; and the outer protection layer is the aluminium magnesium alloy frame body, so that the carbon fiber electric heating plate is firm and durable.

The invention discloses a dispersion strengthened ceramic composite material and a preparation method thereof and belongs to the field of composite materials and engineering ceramic materials. The composite material is formed by compounding silicon carbide of different forms, calcium sulfate whiskers, metal fibers and a composite adhesive, wherein the silicon carbide of different forms, the calcium sulfate whiskers, the metal fibers and the composite adhesive are interweaved and distributed. The preparation method comprises the following steps: 1) uniformly mixing the silicon carbide, the calcium sulfate whiskers, the metal fibers and the composite adhesive under vacuum conditions so as to prepare slurry; 2) vibrating and casting the slurry in a mold under vacuum; and 3) curing the mold and cast slurry, thereby obtaining the dispersion strengthened ceramic composite material. According to the method disclosed by the invention, the problems of wear and corrosion of highly corrosive solid-liquid media on pump materials during transport are effectively solved, and the prepared composite material has the characteristics of high metal matrix adhesion force, high hardness, wear resistance, corrosion resistance, oxidation resistance, thermal shock resistance and the like and is applied to the fields of chemical industry, pharmacy, papermaking and the like.

The invention discloses a piston ring, which comprises the following compositions in percentage by mass: 4-6% of carbon fiber powder, 13-17% of glass fiber, 9-11% of copper powder, 2-3% of molybdenum disulfide, and the balance of polytetrafluoroethylene powder. The piston ring disclosed by the invention has the advantages that: as the carbon fiber is adopted for replacing traditional graphite, as a special fiber consisting of carbon elements, the carbon fiber, besides having the properties of high temperature resistance, friction resistance, electric conduction, heat conduction and corrosion resistance and the like of common carbon materials, also has significant anisotropy, and shows a high strength and a small specific gravity along the axial direction of the fiber, therefore, the carbon fiber has a high specific strength, and plays a significant role in increasing the strength of the piston ring, the strength is more than 150 kg/cm2, and the resisted high temperature can reach more than 300 DEG C.

The invention relates to a graphene-based composite filter material applied to a filter stick for a cigarette and belongs to the technical field of novel filter sticks for cigarettes. According to thegraphene-based composite filter material, firstly graphene oxide is subjected to partial reduction, and the graphene oxide and a spice plant fiber is subjected to crosslinking treatment and casting into a graphene-based thin film; the graphene-based thin film is subjected to hydrophobic modification, a compound system with a plane extraction extract and spice for the cigarette is used for conducting perfuming coating on the graphene-based thin film, the graphene-based thin film is bonded and compounded with a filter stick paper base material for the cigarette or a polylactic acid thin film, and the graphene-based composite filter material applied to the filter stick for the cigarette is prepared. The prepared graphene-based composite filter material has good adsorption slow-release performance, heat conduction performance and hydrophobic performance in the cigarette smoking process, the sensory quality of the main stream smoke can be improved, the problem of thermal collapse of the filter stick for the cigarette is solved, the phenol compound in the main stream smoke can also be obviously lowered, and the quality of the cigarette product is comprehensively improved.

The invention discloses a preparation method for high-filling surface finish carbon fiber master batches for plastic reinforcement. The preparation method comprises the steps of (1) raw materials areprepared; (2) a carrier and an additive in the step (1) are thrown in a high-speed mixer for 5-7 min, and a mixture A is obtained; (3) the mixture A in the step (2) is added into a double-threaded rodextruder through a main feeding port, surface finish carbon fiber in the step (1) is added into the double-threaded rod extruder through a lateral feeding port, and the double-threaded rod extruder extrudes the surface finish carbon fiber out in a melting mode; (4) through stretching, cooling, master batch cutting and drying treatment, the high-filling surface finish carbon fiber master batch products are obtained. The invention provides the high-filling surface finish carbon fiber master batches for plastic reinforcement. The problems that in the preparation process of the high-filling surface finish carbon fiber master batches, the interface bonding force between the master batches and the carrier is poor, and the dispersion of the master batches is uneven are solved, and a material hasconductive and heat-conducting properties.

The invention discloses an insulated heat conduction film for a lithium ion battery. The insulated heat conduction film is used for covering the surface of a battery body. The insulated heat conduction film is prepared from the following ingredients including alkylolamide polyethylene oxide ester, inositol hexaphosphate, diethylene glycol monobutyl ether, dilauryl thiodipropionate, sodium secondary alkyl sulfonate, sodium hexametaphosphate, dibutyl sebacate, polytetrafluoroethylene, styrene and dibutyl phthalate. The insulation heat conduction film has dual attributes of insulation and heat conduction, and covers the surface of the battery body; the safety performance of the battery can be effectively improved.

The invention relates to the technical field of glue, particularly to a formula and a process of environment-friendly epoxy resin glue. The epoxy resin glue is prepared from the following raw materials in parts by weight: 55-80 parts of epoxy resin, 8-15 parts of sodium dodecyl benzene sulfonate, 6-12 parts of potassium persulfate, 2-3 parts of a preservative, 2-5 parts of dibutyl phthalate, 2-5 parts of nanometer silicon dioxide, 4-6 parts of glass fibers, 3-6 parts of a low-temperature-resistant anti-freezing agent, 4-10 parts of a modifier, 2-4 parts of a quick drying agent, 5-8 parts of anodor masking agent, 2-4 parts of scented water and 220-280 parts of deionized water. By arranging the low-temperature-resistant anti-freezing agent, the modifier, the quick-drying agent, the odor masking agent, the scented water and the glass fibers, the epoxy resin glue has a quick solidification function, corrosion resistance, high-temperature resistance, low-temperature resistance and the like, and is environmentally friendly.

The embodiment of the invention provides a display device. The display device comprises a substrate, a planarized layer covering the substrate and a protective layer covering one side, deviating fromthe substrate, of the planarized layer; and the protective layer has thermal conductivity, transparency and insulativity. According to the embodiment of the invention, the protective layer with the thermal conductivity, transparency and insulativity covers the planarized layer, the planarized layer can be effectively protected, the planarized layer is prevented from deforming in a follow-up preparation process, loss of blue light in white light of the planarized layer is reduced, color temperature is increased, the white light is improved, and light emitting quality of the display device is improved.

The present invention relates to a heat-dissipated-and-Chip-On-Film package, and mainly includes a circuit film, a protruded wafer and a point-coated colloid. The circuit film is defined with a pair of joint regions of wafer which correspond to the wafer, and has a soft dielectric layer, even numbers of pins and a supporting copper pad. Even numbers of inner joints of the pins are arranged around the joint regions of wafer, and the supporting copper pad is formed in central of the joint regions of wafer, thus collapse of the soft dielectric layer during combination of the protrusions of the wafer and the inner joints of the pins can be avoided. Therefore, the point-coated colloid can be successfully filled between the circuit film and the wafer, and no bubble will occur.

The invention relates to the technical field of PE blown films, and discloses a stirring device for PE blown film raw material particle machining. The device comprises an outer box body; the outer boxbody is internally and rotationally connected with a stirring shaft, and the stirring shaft is fixedly connected with a stirring blade; the outer box body is internally and rotationally connected with an inner box body used for loading raw material particles, a cavity is arranged between the inner box body and the outer box body, a driving mechanism used for driving the inner box body to rotate is arranged in the cavity, and a ventilation hole communicating with the cavity is formed in the inner box body; and an air supplying box communicating with the cavity is arranged on the outer box body, a switch for opening and closing the air supplyng box is arranged on the inner wall of the outer box body, a first rack which can abut against the switch is slidably connected to the inner wall of the outer box body, and the stirring shaft is coaxially connected with a sector gear which is meshed with the first rack. According to the device, the problem of non-uniform stirring of the raw material particles in the prior art can be solved.