307 results about "Electronic industry" patented technology

The invention discloses a multi-mode CNN / Transform image defect diagnosis tracking decision-making method, and belongs to the field of power electronic industry detection. According to the method, defect position multi-modal data of different batches, process stages and equipment are collected, after space-time alignment and image enhancement preprocessing and alignment are conducted, features are extracted through position coding, a CNN shallow network and ResNet-18, the features are fused into multi-modal feature vectors in combination with weights, a detection model is obtained through CNN / Transform model training, defect diagnosis and tracking decision making are achieved, and the defect diagnosis and tracking decision making efficiency is improved. The problems of precise detection, positioning, diagnosis tracking and decision-making of internal tiny component changes and structural defects of electronic products and local and overall multi-mode defects of single electric power are solved. The detection accuracy is improved by 20%, the diagnosis accuracy is more than 98.5%, the defect tracking error is less than 5%, the decision-making efficiency is improved by 40%, and the defect prediction capability is improved by 22%.

The invention discloses a preparation method of a nano lanthanum hexaboride reinforced titanium-based composite material, which comprises the following steps: performing low-energy ball milling and high-energy ball milling on a pure titanium metal powder and / or titanium alloy powder base material and a nano lanthanum hexaboride powder reinforced phase to obtain composite powder; sintering in a rapid hot-pressing sintering furnace, and cooling to obtain a LaB6 / Ti-based sintered blank; and carrying out heat-preservation hot rolling in a vacuum heat treatment furnace. The invention further discloses the nanometer lanthanum hexaboride reinforced titanium-based composite material and application. The nanometer lanthanum hexaboride reinforced titanium-based composite material has excellent strength and ductility, the tensile strength reaches 1035 MPa, the percentage elongation after fracture is 5%-25%, and the strength is improved by 60% or above compared with that of pure titanium; the preparation method is short in process, high in efficiency, low in production cost, high in universality and suitable for various titanium or titanium alloy base materials, and the composite material has good application prospects in the fields of radar, aviation, aerospace, automobiles, electronic industry and biomedicine.

The invention relates to the field of manufacturing of sensitive elements and sensors in the electronic core industry, in particular to a piezoelectric MEMS acoustic device and a manufacturing method thereof. The device structurally comprises a substrate, an insulating layer, a silicon substrate, a multi-layer composite film structure and a protective layer from bottom to top in sequence, wherein the multi-layer composite film structure is formed by alternately growing electrode layers and piezoelectric layers, and the first layer and the last layer of the multi-layer composite film are the electrode layers; a bonding pad is arranged on the multi-layer composite film structure; the protective layer covers the upper surface of the device; a suspended back cavity structure is arranged between the substrate and the insulating layer; the silicon substrate, the multi-layer composite film structure and the protective layer are connected through an opening communicated with the back cavity; according to the device provided by the invention, the volume of the piezoelectric material is increased mainly by adding the piezoelectric layer, and the energy conversion efficiency of the structure is effectively improved, so that the sensitivity of the transducer is improved.

The invention provides a silver-coated copper material and a preparation method and application thereof. The silver-coated copper material comprises a base body and a silver layer coated on the surface of the base body, the base body comprises copper particles and a silver framework, the silver framework is provided with holes, the copper particles are distributed in the holes of the silver framework, and the silver layer is prepared by adopting a chemical plating method. The pore structure of the silver skeleton and the distribution of the copper particles are utilized, the separation of nucleation and growth of the silver coating is realized, the uniformity and compactness of the growth of the silver coating are ensured, the oxidation resistance and the conductivity of the silver-coated copper material are further improved, the use amount of precious metal silver is greatly reduced while the performance of the material is ensured, and the production cost is reduced. Cost control is realized; when the silver-coated copper material is applied to the fields of photovoltaic and electronic industry, the cost of raw materials can be remarkably reduced, the service life of the raw materials is prolonged, and large-scale use is facilitated.

The invention discloses a method for purifying and recycling hydrofluoric acid waste liquid in the electronic industry, which comprises the following steps: rectifying the hydrofluoric acid waste liquid to remove moisture, performing membrane separation treatment on the material liquid to remove most of metal ions in the material liquid, and performing adsorption treatment on the material liquid to remove a small amount of metal ions in the material liquid. And finally, carrying out membrane separation treatment to remove trace metal ions and particulate impurities in the feed liquid. Through a specific combined process, impurities and metal ions in the hydrofluoric acid waste liquid in the electronic industry are effectively removed, the product reaches the electronic-grade recycling standard, and the resource recycling rate is increased.

The invention discloses a process for preparing ultra-pure hydrogen by recovering and purifying hydrogen. The process comprises the following steps: nitrogen replacement: carrying out three times of pressurization-decompression circulation on an adsorption tower and a pipeline; pretreatment of raw materials: hydrogen-containing tail gas is treated by a buffer tank, a compressor, a desulfurization tower and a horizontal adsorption tower and then enters a PSA (Pressure Swing Adsorption) system; pSA purification: a 6-2-3 / P process is adopted, two towers in six adsorption towers perform adsorption at the same time, and hydrogen larger than or equal to 99.99% is produced; regeneration of the adsorbent is completed through three-stage pressure equalizing and reducing, clockwise / anticlockwise pressure reducing, product hydrogen flushing and three-stage pressure equalizing and boosting; refining by a membrane separation unit: carrying out membrane separation on PSA hydrogen to produce ultrapure hydrogen of which the purity is greater than or equal to 99.999%, and returning trapped gas to a compressor; and condensate water recovery: carrying out steam stripping and deoxygenization on the process condensate liquid, and then taking the process condensate liquid as boiler feed water. The process integrates PSA and membrane separation technologies, realizes efficient and energy-saving ultrapure hydrogen preparation, and is suitable for the fields of green hydrogen energy storage, electronic industry, high-end chemical industry and the like.

The invention relates to the technical field of electronic products, and discloses a shell with a quick release structure and an electronic product, the shell comprises a shell main body, a frame, an easy-to-pull adhesive and a magnetic attraction assembly, and the frame located on the peripheral side of the shell main body is attracted and spliced with the shell main body through the magnetic attraction assembly; and the display module is adhered to the shell main body by using the easy-to-pull adhesive of which the viscosity is obviously reduced after being stretched, so that quick disassembly of a product can be realized, damage events in the disassembly process can be reduced, the rejection rate of the product is reduced, the recovery rate of electronic materials is improved, and the requirements of international environmental protection regulations are met; and cyclic utilization and sustainable development of resources are also promoted. The improved measure has important significance in promoting the whole electronic industry to transform to a greener and lower-carbon direction.

The invention relates to a preparation method of silver-coated copper powder for the electronic industry, in particular to a preparation method of silver-coated copper powder for low-temperature slurry, which comprises the following steps: (1) alkali washing; (2) pickling; (3) organic modification; and (4) chemical silver plating is conducted, filtering, cleaning and drying are conducted after chemical silver plating is completed, and the silver-plated copper powder is obtained. Copper powder replacement is inhibited through surface organic modification, so that the copper powder does not participate in the reaction or does not participate in the reaction slightly, on one hand, copper powder raw material waste caused by the replacement reaction can be reduced, and on the other hand, batch instability caused by the morphology and specific surface area difference of the copper powder can be reduced. The silver-coated copper powder prepared by the method has excellent conductivity, high temperature resistance and silver-copper interlayer binding force, and can meet shearing acting forces such as high temperature and extrusion in the preparation and use process of low-temperature slurry.

The invention belongs to the technical field of organic matter purification, and relates to a separation and purification process of NMP (N-Methyl Pyrrolidone). The invention aims to solve the problem that an existing NMP recovery process cannot effectively treat NMP waste liquid generated by different industrial types. The method comprises the following steps: introducing an NMP recovery liquid into a primary filtration unit to obtain pretreated NMP; the conductivity of the pretreated NMP is measured, a chemical neutralization unit, an adsorption unit or a reduced pressure distillation unit is adopted for treatment according to the difference of the conductivity, obtained different products are correspondingly treated and then jointly treated through an extractive distillation unit, and product-grade NMP is obtained. According to the separation and purification process provided by the invention, various impurities in various types of NMP recovery liquid from the electronic industry can be effectively removed, and the electronic-grade NMP solvent can be efficiently recycled.

The invention discloses an electronic industry clean workshop air circulation function self-adaptive adjusting system and method. The adjusting system comprises a three-dimensional grid monitoring module, a data processing module, a visualization module, a computer vision module, an intelligent decision module and an air circulation control module. The adjusting method comprises the steps of three-dimensional grid sensing arrangement and monitoring, data processing, data visualization, image feature extraction, abnormal area early warning, air circulation parameter decision making, self-adaptive adjusting execution and closed-loop feedback optimization. A continuous space distribution model is constructed through real-time monitoring data of a three-dimensional grid sensor and is converted into a dynamic visual three-dimensional heat map, correlation between environment characteristics and air circulation control quantity is further established, and air flow control parameters are output based on local pollution abnormal conditions. The adjusting accuracy of the system on complex working conditions can be remarkably improved, and self-adaptive adjustment and sustainable evolution of the air circulation function are achieved.

The invention discloses a method for preparing a sodium-ion battery hard carbon negative electrode material by modifying industrial waste activated carbon. Industrial waste activated carbon is used as a raw material, a high-molecular polymer is used as a modifier, water or an organic solvent is used as a solvent, and the sodium-ion battery hard carbon negative electrode material is obtained through process treatment of firstly mixing, then carrying out medium-low temperature pretreatment and finally carrying out high-temperature carbonization. The method disclosed by the invention is simple and environment-friendly in process, waste utilization of the waste activated carbon generated in the field of waste gas treatment in the electronic industry, the shoemaking industry or the printing industry can be realized, and the prepared hard carbon has the characteristics of high yield, good electrochemical performance and low cost.

The invention relates to antistatic dust-free cloth and a preparation method thereof, and belongs to the technical field of dust-free cloth. A plasma treatment technology is adopted to remove impurities on the surface of polyester fibers and increase the contact area of the polyester fibers, and sericin is added for modification, so that the compatibility and binding force of the polyester fibers and conductive fibers are effectively improved, and meanwhile, the finished cloth is endowed with softer touch feeling; polyethylene glycol glycidyl ether is introduced and can be combined with sericin to form a cross-linked structure, so that the antistatic performance is further improved, and the softness and wear resistance are optimized. Active groups can be introduced to the surfaces of the carbon fibers through mixed acid treatment, and the compatibility of the carbon fibers and the modified polyester fibers is enhanced. Polyoxyethylene alkylamine permeates into the fibers by using a decompression infiltration technology, and the dust-free cloth has a long-acting antistatic effect by combining the antistatic property of the conductive fibers. The comprehensive performance of the cloth is effectively improved, the requirement of the electronic industry for the high anti-static performance of the dust-free cloth is met, and wide application prospects are achieved.

The invention relates to the technical field of safe toe cap preparation, in particular to a carbon fiber composite material for manufacturing a special toe cap and a preparation method of the carbon fiber composite material. The invention relates to a carbon fiber composite material for manufacturing a special toe cap. The carbon fiber composite material is formed by hot pressing a plurality of carbon fiber prepreg cloths; the carbon fiber prepreg is prepared from the following raw materials in parts by weight: 60 to 64 parts of carbon fibers, 25 to 28 parts of matrix resin, 3 to 4 parts of low-shrinkage resin, 0.15 to 0.25 part of an initiator, 0.2 to 0.5 part of a cross-linking agent, 4 to 6 parts of styrene, 0.4 to 0.6 part of magnesium oxide, 0.3 to 0.4 part of a defoaming agent, 1 to 1.5 parts of a release agent and 0.6 to 0.8 part of carbon nanotubes. The carbon fibers at least comprise carbon fiber woven roving. The safety toe cap prepared from the carbon fiber composite material disclosed by the invention has good compressive strength, impact strength and antistatic property, and can meet the electrostatic protection requirement of the safety toe cap for the electronic industry.

The invention discloses a high-specific-gravity and high-toughness tungsten-nickel-copper material and a preparation method thereof, and belongs to the technical field of non-ferrous metal materials. The material comprises the following components in percentage by mass: 6-15% of nickel; 2-5% of copper; 2-5% of manganese, and the balance tungsten and inevitable impurities. The preparation method of the material comprises the following steps: preparing materials (pure tungsten powder, pure nickel powder, pure copper powder and pure manganese powder), mixing the powder, pressing, sintering, and carrying out recrystallization annealing heat treatment. In the burdening step, two kinds of tungsten powder with different particle size grades are selected and added, and the gradient particle size ratio is adjusted. By adding the strengthening element manganese, combining the gradient particle size ratio and enhancing interface bonding, the high specific gravity and high strength of the material are kept, meanwhile, excellent toughness can be kept, and the material is suitable for aerospace gyroscope rotors and balance weight parts, electronic industry precise instrument parts, medical instrument ray shielding materials and national defense military industry kinetic energy armor-piercing weapon parts.

The invention discloses a method for treating high-concentration ammonium fluoride wastewater in the electronic industry, which specifically comprises the following steps: firstly, carrying out induced crystallization fluorine resourceful treatment to remove fluoride in the wastewater; performing enzyme catalytic decomposition of hydrogen peroxide to remove hydrogen peroxide in the wastewater; and finally, carrying out integrated anaerobic ammonia oxidation treatment to remove ammonia nitrogen in the wastewater. According to the method disclosed by the invention, a combined process of induced crystallization fluorine recycling, enzyme catalysis hydrogen peroxide decomposition and integrated anaerobic ammonia oxidation is adopted, fluoride removal and fluorine recycling are synchronously realized through an induced crystallization process, and hydrogen peroxide is efficiently removed through an enzymatic reaction; high-efficiency treatment of high-ammonia-nitrogen wastewater is realized through a short-cut nitrification-anaerobic ammonia oxidation process under a low-energy-consumption condition, and the problems of high agent consumption, high sludge yield, high operation cost and low ammonia-nitrogen removal rate of a traditional ammonium fluoride wastewater treatment process (air stripping and chemical coagulation) are solved.

The invention provides a copper-nickel-tin alloy strip and a preparation method thereof, and relates to the technical field of copper alloys. The copper-nickel-tin alloy strip provided by the invention comprises the following components in percentage by mass: 8.5%-10% of Ni, 1.5%-3% of Sn, 0.5%-1.5% of Al, 0.3%-0.6% of Si, 0.19%-0.21% of Cr, 0.05%-0.30% of Mn and the balance of Cu. The tensile strength of the copper-nickel-tin alloy strip ranges from 580 MPa to 770 MPa, the percentage elongation after fracture A50 is larger than or equal to 8%, the hardness ranges from 170 HV to 240 HV, the electric conductivity is larger than or equal to 10% IACS, and the grain size is smaller than or equal to 0.015 mm. And the material can be stably applied to elastic sensitive elements of electronic industrial relays, potentiometers, switches, connectors, lead frames, control and instrument sensors and the like.

The invention relates to the technical field of ceramic materials, in particular to a high-temperature impedance X7R dielectric ceramic material and a preparation method and application thereof.The high-temperature impedance X7R dielectric ceramic material is prepared from main powder, a doping agent, a dispersing agent and a binding agent, the main powder is prepared from BaTiO3 and Na0. 5Bi0. 5TiO3 according to the molar ratio of 9: 1 through ball milling and presintering, the presintering temperature ranges from 1200 DEG C to 1400 DEG C, and the presintering time ranges from 2 h to 4 h; the doping agent is obtained by pre-sintering Nb2O5, transition metal oxide MeO and MgCO3, the pre-sintering temperature is 650 to 750 DEG C, and the pre-sintering time is 1 to 2 hours; the main powder is 100 parts by mole, the Nb2O5 is 0.1 to 1.0 part by mole, the MgCO3 is 0.1 to 1.0 part by mole, and the transition metal oxide MeO is 0.1 to 3.0 parts by mole. The temperature characteristic of the dielectric ceramic is improved, and the temperature stability of the dielectric ceramic meets the X7R dielectric material standard formulated by the American Electronic Industry Association.

The invention belongs to the technical field of preparation of copper foils for the electronic industry, and particularly relates to a method for improving the surface corrosion resistance of a copper foil by adopting a 2-mercaptobenzothiazole-cerium composite corrosion inhibitor. The preparation method comprises the following steps: preparing 2-mercaptobenzothiazole; preparing a cerium nitrate solution; preparation of the 2-mercaptobenzothiazole-cerium compound type corrosion inhibitor is carried out; preparing an electro-deposition copper foil; and carrying out corrosion inhibition treatment on the copper foil. According to the method for improving the corrosion resistance of the surface of the copper foil by adopting the 2-mercaptobenzothiazole-cerium composite corrosion inhibitor, the corrosion resistance of the copper foil can be remarkably improved through MBT-Ce corrosion resistance treatment and passivation treatment, so that the service life of the copper foil in a severe environment is prolonged; meanwhile, the surface quality of the copper foil is improved, so that the copper foil is smoother, and subsequent processing and application are facilitated; in addition, the anti-stripping strength value can be improved, so that the adhesive is more durable in the use process; and finally, production efficiency is improved, production cost is reduced, and large-scale production is facilitated.

The invention relates to the technical field of data processing, and discloses an industrial SOP recognition system and method based on an electronic industry large model, and the method comprises the steps: extracting knowledge data from an electronic industry data source, and constructing an original knowledge graph according to the knowledge data; the node degree of each original node in the original knowledge graph is calculated, all isolated nodes are screened out according to the size of the node degrees, and after a plurality of associated nodes related to the isolated nodes are obtained, relation mining is conducted on the isolated nodes and the associated nodes to obtain a plurality of second relations; performing structure optimization on the original mapping knowledge domain according to the second relationship, and adding a new relationship edge for the isolated node to obtain a large mapping knowledge domain model applied to the electronic industry; inputting the to-be-queried request into the knowledge graph large model to identify corresponding SOP data; according to the method and the device, the query accuracy of the SOP knowledge graph is improved.

The invention provides a preparation method of electronic-grade ammonium acetate. The obtained electronic-grade ammonium acetate is suitable for the electronic industry. The method comprises the following steps: S1, dissolving industrial-grade ammonium acetate at room temperature, and preliminarily removing impurities such as metals and anions in an ammonium acetate aqueous solution by using anion-cation exchange resin to obtain a resin purified solution; and S2, concentrating the resin purified liquid under reduced pressure until the concentration of ammonium acetate is 75-80% wt, cooling and crystallizing, centrifuging, washing, dissolving and filtering to obtain a 60-65% wt electronic grade ammonium acetate solution with the metal ion content of less than 1 ppb, the anion content of less than 10 ppb and the particle size of 0.3 mu m of less than 10 pcs / ml. The whole preparation process can be cyclically produced, the production process is mild and pollution-free, and the method is simple in process and suitable for industrial production.

The invention relates to the technical field of alloy materials, in particular to an anti-corrosion nano black passivation type metal material and a preparation technology and application thereof. The invention discloses an anti-corrosion nano black passivation type metal material which is prepared from stainless steel powder, tungsten carbide subjected to surface modification treatment and spherical graphene modified stainless steel powder through a powder metallurgy process. The total mass of the tungsten carbide subjected to surface modification treatment and the spherical graphene modified stainless steel powder is 0.5-1.0 wt% of the mass of the anti-corrosion nano black passivation type metal material; the mass ratio of the tungsten carbide subjected to surface modification treatment to the spherical graphene modified stainless steel powder is 1: (0.1-5); the tungsten carbide subjected to surface modification treatment comprises matrix tungsten carbide and nano modified metal particles loaded on the surface of the matrix tungsten carbide. The anti-corrosion nano black passivation type metal material meets the salt spray resistance of steel in the electronic industry, subsequent electroplating treatment is not needed, the precision of electronic devices is relatively good, the product yield is improved, and the product cost is reduced.

The invention discloses a preparation method of an ultra-smooth nanocrystalline tungsten coating on the surface of an emitter, the tungsten coating is prepared by adopting a magnetron sputtering method, and the specific process is as follows: pretreating an emitter workpiece, then placing the emitter workpiece in a vacuum chamber, pre-vacuumizing, then introducing inert gas, cleaning the surface of the emitter workpiece by utilizing gas ion reverse sputtering, and finally removing the surface of the emitter workpiece. And then adjusting the gas pressure, bombarding and cleaning the surface of the emitter workpiece by using metal ions, and finally sputtering and depositing to form the tungsten coating. The tungsten coating is prepared through the magnetron sputtering technology, the tungsten coating has the characteristics of being compact in structure, good in combination and uniform and smooth in surface, the mechanical property and structural stability of the tungsten coating in the high-temperature service environment can be guaranteed, the deposition technology is simple, the preparation efficiency is high, and the tungsten coating is green and free of pollution, in addition, preparation of the tungsten coating composed of different phases can be achieved, and the application prospect is wide. The application requirements in the fields of electronic industry, nuclear industry and the like are met.

The invention provides a preparation method of micron-sized spherical silver-coated copper powder for the electronic industry, and belongs to the technical field of conductive materials.The preparation method comprises the steps that a copper sulfate solution and ethyl alcohol react to obtain a first solution; adding an ammonium oxalate solution into the first solution to obtain slurry; adding a silver nitrate solution and an ammonium oxalate solution into the slurry, and performing stirring, standing and vacuum drying to obtain an oxalate precursor precipitate; mixing the oxalate precursor precipitate with stearic acid, carrying out first vacuum mixing and kneading, adding fumed silica particles, and carrying out second vacuum mixing and kneading to obtain powder; and heating the powder to 135-145 DEG C in a vacuum state, preserving heat for 1.5-2.5 hours, continuously heating to 270-320 DEG C, preserving heat for 1.5-2.5 hours, cooling to room temperature along with a furnace, and carrying out acid pickling, suction filtration, washing, drying and sieving. The micron-sized spherical silver-coated copper powder is high in oxidation resistance, short in process period and high in yield.

The invention provides an inorganic fluoride waste environment-friendly treatment system capable of reducing harm, which is suitable for the technical field of inorganic fluoride environment-friendly treatment and comprises a support frame, a plurality of environment-friendly treatment pipes are assembled on the support frame in a sliding manner, and the environment-friendly treatment pipes are driven by a driving assembly to perform closed-loop circulating rotation; a sewage discharge water pipe group is mounted on one side of the support frame and is used for being detachably butted with an environment-friendly treatment pipe; a water outlet pipe group is mounted on the other side of the support frame and is used for receiving fluid treated by the environment-friendly treatment pipe; chemical waste liquid containing inorganic fluoride waste is guaranteed to be in full contact with the modified zeolite, comprehensive and full contact of the modified zeolite is improved, inorganic fluoride is adsorbed and removed, and harm is reduced; and on the basis of ensuring that the sewage discharge water pipe group normally discharges chemical waste liquid containing inorganic fluoride waste without shutdown, the inorganic fluoride is efficiently, comprehensively and sufficiently contacted, adsorbed and removed, and normal production activities in the electronic industry are carried out.

The invention discloses a defluorination agent suitable for defluorination of electronic industrial wastewater as well as a preparation method and a defluorination method of the defluorination agent. The defluorination agent comprises 9-10 wt% of aluminum salt, 0.1-0.2 wt% of ferric salt, 0.6-1.1 wt% of an alkaline regulator and the balance of water, the aluminum salt is selected from one or more of polyaluminum chloride and aluminum sulfate, and the ferric salt is selected from one or more of ferric trichloride, ferric sulfate and polyferric sulfate. The fluorine removal agent provided by the invention can realize that the fluorine concentration of discharged water is lower than 1mg / L through one-stage / two-stage fluorine removal under a low-fluorine, medium-fluorine or high-fluorine water inlet condition, the optimal pH condition of reaction is reduced, the acid-base and agent use cost is saved, and meanwhile, the fluorine removal agent is simple in preparation method and can be applied to large-scale popularization and production.

A bag filter and a bag-type folding filter element thereof are characterized in that a cylinder cover capable of being opened and closed is arranged on a cylinder shell, the bag-type folding filter element and a pressure plate group are detachably arranged in the cylinder shell, the bag-type folding filter element comprises a core pipe, a folding filter material, an outer pipe, an inner pipe and a positioning plate, the folding filter material is arranged on the outer edge of the core pipe in a surrounding manner, and the positioning plate is arranged on the outer edge of the core pipe. An inner pipe at the bottom end of the positioning disc extends into the core pipe and the top cover, the positioning disc is provided with a pipe hole communicated with the inner pipe, a sealing gasket is arranged on the outer edge of the positioning disc, and a hand lifting part avoiding the center of the pipe hole is arranged on the inner edge of the pipe hole, so that the pressing disc group can really extrude the positioning disc and the sealing gasket for airtight positioning; and the bag type folding filter element can filter pollutants with the size of 0.001 mu m or more, so that the bag type folding filter element meets the use requirements of precision electronic industry equipment.

The present invention relates to an ionic liquid grafted epoxy resin for electronic industry and an application thereof, the coulombic action energy of the ionic liquid grafted epoxy resin is greater than or equal to 100 KJ / mol, the resin composition comprises the ionic liquid grafted epoxy resin and a filler, the interfacial tension between the ionic liquid grafted epoxy resin and the filler is controlled to be less than or equal to 30mN / m. In the resin composition, the ionic liquid is grafted with the epoxy resin, molecular-level combination of the resin and a filler interface is achieved by controlling interfacial tension, the interface thermal resistance can be remarkably reduced, and an efficient and stable heat conduction path is established. Furthermore, when products such as circuit substrates are prepared, the products can have excellent mechanical property, heat resistance, CAF resistance and heat-conducting property at the same time through the synergistic effect.

The invention discloses a high organic matter removal anti-pollution polyamide reverse osmosis membrane and a preparation method and application thereof, the polyamide reverse osmosis membrane sequentially comprises a polyester non-woven fabric layer, a polysulfone ultrafiltration support layer, a polyamide separation bottom membrane layer and a hydrophilic polymer anti-pollution layer; the polyamide separation bottom membrane layer is a cross-linked polymer formed by an interfacial polycondensation reaction of polyamine and polyacyl chloride; the hydrophilic polymer anti-pollution layer is a polymer formed by carrying out a cross-linking reaction on a diblock hydrophilic polymer containing a pyrrolidone chain segment and an amino chain segment and a small molecular compound containing an epoxy group and / or an allyl group. The polyamide reverse osmosis membrane has good application prospects in the fields of removal of organic matters in pure water in the electronic industry, removal of trace organic matters in domestic drinking water and the like.

The utility model discloses a pin braid clamping device for tinning, and belongs to the technical field of electronic industry auxiliary devices. According to the technical scheme, the pin braid clamping device for tinning comprises a first clamping unit, a second clamping unit and collodion; the first clamping unit comprises a first clamping plate, a plurality of first clamping strips arranged on one side face of the first clamping plate in parallel, and first intervals reserved between the adjacent first clamping strips. The second clamping unit comprises a second clamping plate, a plurality of second clamping strips which are arranged at one end of the second clamping plate in parallel and correspond to the first intervals in a one-to-one mode, and second intervals reserved between the adjacent second clamping strips. The pin braid clamping device for tinning has the beneficial effects that the pin braid clamping device for tinning is simple in structure and manufacturing, low in manufacturing cost, convenient for batch production, convenient to operate and high in working efficiency.

The present invention discloses a novel circulation mechanism, which includes a bottom plate. A circulation conveying mechanism is arranged on the bottom plate and is used for reciprocatingly circulating and transporting tooling fixtures; a tooling hook component is arranged on the circulation conveying mechanism, and the tooling hook component can drive the tooling fixtures on the circulation conveying mechanism to move; a tooling switching mechanism is symmetrically arranged at both ends of the circulation conveying mechanism and is used for circularly switching the tooling fixtures on the circulation conveying mechanism; and a tooling return flow mechanism is arranged on the bottom plate and is used for providing a power source for the movement of the return flow tooling fixtures on the circulation conveying mechanism. The present invention has the characteristics of simple and reasonable structure, safe and reliable operation, high equipment compactness, low production cost, high production efficiency, etc. The production efficiency is increased to more than 2000 PCS / hour. In addition, the present invention can also be widely applied to the part assembly production in the hardware and electronics industries for popularization and use, and has a broad market prospect.