125 results about "Electronic industry" patented technology

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 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 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.

This invention relates to a natural fiber reinforced composite material sheet and its manufacturing method, applicable to the automotive, drone, architectural decoration, and consumer electronics industries. The sheet uses natural fiber fabrics such as flax, hemp, jute, sisal, or bamboo fiber as the reinforcing layer, which is cured with a resin matrix. The reinforcing layer can consist of 1 to 10 layers of natural fiber fabric, and plain weave, twill weave, satin weave, or multi-axial weave can be used as needed to obtain good tensile, bending, and interlayer bonding properties. This invention improves fiber impregnation uniformity and reduces moisture absorption through resin system modification, fiber surface treatment, and vacuum-assisted curing, overcoming the shortcomings of natural fiber composite materials in terms of interfacial bonding, dimensional stability, and process consistency. The resulting sheet is lightweight, has high damping, good electromagnetic wave transmission, and is environmentally friendly and low-carbon, and can be used in battery protection panels, drone arm tubes, sound insulation panels, and automotive interior cladding.

The invention discloses a cloud control method, system and device for feeding equipment and a medium. Through full-process control of data uploading, cloud storage and data execution, rapid issuing and adaptation of the parameter instruction of the feeding equipment are realized, compared with a traditional scheme, the scheme does not need to re-debug the mechanical structure of the equipment for different materials, rapid switching can be carried out through a universal data compression format packet transmitted by the cloud to adapt to different types of materials, and the efficiency is improved. The method has the advantages of high equipment flexibility, high model changing efficiency and strong visual identification robustness, and is suitable for small-batch and multi-variety production requirements in the electronic industry.

1. Name of the product in this design: Ultraviolet sterilizer. 2. Application of this design: It is used for sterilization of water supply systems in municipal, electronic industry, ultrapure water, food, beverage, chemical and pharmaceutical industries. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention discloses a composite metal soldering lug and a preparation method and application thereof, and belongs to the technical field of electronic industry welding. The preparation method of the composite metal soldering lug comprises the following steps: S1, preparing high-activity metal slurry, wherein the high-activity metal slurry comprises an active metal precursor, metal powder and an organic carrier; wherein the high-activity metal slurry comprises the following materials in percentage by mass: 1-50% of an active metal precursor, 1-50% of metal powder and 1-20% of an organic carrier; s2, uniformly coating the high-activity metal slurry on the surface of the metal base material; and S3, the metal base material coated with the high-activity metal slurry is subjected to post-treatment, and the composite metal soldering lug with the pre-sintered soldering layer on the surface is obtained. According to the method, the presintered welding layer of the composite metal soldering lug is formed through the high-activity metal slurry, the preparation efficiency is improved, good sintering activity can be kept, and then chips and devices packaged by the composite metal soldering lug are endowed with excellent performance and service reliability.

The application discloses an air purification system for electronic industrial plants, and relates to the technical field of air purification.The system collects pollution characteristic data in real time through a sensor group, obtains an air particle data group and a purification efficiency data group through data processing, constructs a nanometer pollution disturbance index nan based on the air particle data group to evaluate air cleanliness, and when nanometer pollution is detected, constructs a photocatalytic reaction efficiency index npc based on the purification efficiency data group, fuses the nanometer pollution disturbance index nan to form a purification collapse risk index Rall to evaluate photocatalytic cleaning capacity, dynamically adjusts the operation strategy of an ultraviolet light source and a fan according to the evaluation result, and realizes hierarchical alarm and operation information interaction through a man-machine interface and an audible and visual alarm, and archives to form a closed-loop database.The system can realize real-time monitoring, dynamic purification and risk early warning of air quality of electronic industrial plants, improve air purification efficiency and stability, reduce energy consumption and has traceability.

This invention relates to a self-oscillating closed-loop voltage regulator circuit, comprising a self-oscillating circuit, a primary power supply undervoltage indicator circuit, a secondary power supply undervoltage indicator circuit, a key valid indicator circuit, a power amplifier circuit, and a boost control circuit. The self-oscillating circuit outputs a fixed-frequency reference square wave signal. Undervoltage, overvoltage, and key valid indicator signals are passed through an AND gate to output a variable-frequency square wave signal. This variable-frequency square wave signal is then passed through a complementary pull-up circuit to increase the driving capability. The complementary output variable-frequency square wave controls the boost circuit. When the battery is low or the secondary power supply is undervoltage, the output frequency of the self-oscillating circuit controls the switching of the boost circuit to achieve rapid voltage boost. When the battery and secondary power supply voltages are normal, the boost control circuit is shut down. This effectively ensures stable operation under normal control conditions and is particularly suitable for the automotive electronics industry.

Embodiments of the present application disclose a traffic data forensic analysis method and device, computer equipment and a storage medium. The method comprises: converting a captured data traffic condition configuration and an operation button into a command line; executing the command line to obtain a traffic data packet; importing a historical traffic data packet; analyzing the traffic data packet and the historical traffic data packet to obtain an analysis result; saving the analysis result; obtaining a voice query request; querying corresponding content from the analysis result according to the voice query request and converting the corresponding content into a voice file; and exporting the voice file. The method of the embodiments of the present application can meet the high safety requirements of the electronic industry and the simple operation and fast evidence obtaining speed in the specific case handling process.

The invention provides an acid-resistant composite rubber material with good elasticity. The acid-resistant composite rubber material is prepared from the following raw materials in parts by mass: 100 parts of a rubber matrix; 40 to 50 parts of inorganic filler; 8-12 parts of a plasticizer; 4-8 parts of zinc oxide; 1-2 parts of stearic acid; 2-3 parts of a compound anti-aging agent; 0.8 to 1.5 parts of sulfur; and 3-6 parts of a compound accelerant. Therefore, according to the technical scheme, on the premise that sufficient acid resistance is guaranteed, the hardness is accurately controlled to be 60 degrees A by adjusting the filler and the plasticizer, the elastic recovery is maximized, and the water squeezing property depends on the elastic recovery capacity of the rubber roller. And the water film can be quickly recovered after instant deformation under pressure, so that the water film can be bounced off and scraped. Therefore, the technical scheme of the invention has excellent acid resistance and water squeezing property, and can meet the water squeezing requirement of the electronic industry (copper foil).

The invention provides an urban governance construction image authenticity form automatic generation method and system, and belongs to the field of urban governance. According to the technical scheme, the method comprises the steps of collecting construction site image data and site affiliated information, embedding a tamper-proof mark, generating preprocessed image data with an authenticity mark in combination with multi-dimensional authenticity verification and preprocessing, constructing a candidate field set and a sample set by using each recognition model, training various models, and establishing a candidate field set and a sample set; and calling the trained model on newly acquired field image data to automatically generate and associatively store an electronic business form. The method has the beneficial effects that the quantization and credibility of the construction site image are realized by introducing the multi-source tamper-proof watermark at the acquisition end and performing multi-dimensional authenticity scoring; through a candidate field set in linkage with text recognition, object recognition and table structure recognition, form template selection and a field mapping model, an electronic business form conforming to industry specifications is automatically generated, and the manual input workload and the error rate are obviously reduced.

The application discloses a Tibetan speech recognition method fusing tone perception hybrid experts and retrieval error correction, and belongs to the technical field of signal processing in the electronic industry. The specific steps of the recognition method are as follows: I: Tibetan speech signals are acquired, and corresponding log-mel spectrogram features and fundamental frequency contour features are extracted; II: the tone gating weight is calculated based on the fundamental frequency contour features, and is dynamically routed to the corresponding hybrid expert network to acquire dialect-independent acoustic hidden layer features. The application effectively solves the model interference problem caused by the presence or absence of tones among multiple dialects, avoids the parameter conflict between tone dialects and non-tone dialects, significantly improves the recognition performance of multi-dialect hybrid training, corrects the homonym heterograph error commonly existing in Tibetan, improves the performance of multi-dialect Tibetan speech recognition, can be used for converting Tibetan speech into characters, and is helpful for protecting and mining Tibetan culture.

The utility model discloses a medium efficiency bag type filter, relates to bag type filtration technical field, including outer frame, inside the outer frame is provided with support frame, inside the outer frame is also provided with a plurality of chemical fiber finished product bags, the top of a plurality of chemical fiber finished product bags is provided with a plurality of hooks, the plurality of hooks are arranged on the support frame, the outer frame is made of aluminium alloy material, the outer frame is made of aluminium alloy material, and the outer frame is made of aluminium alloy material. The splicing positions of the outer frames are fixed through aluminum alloy corner connectors, and the chemical fiber finished bag is composed of multiple layers of fiber materials. The medium-efficiency bag type filter is usually matched with a primary filter for use, the outer frame can be made of an aluminum alloy section, a galvanized folding frame or a stainless steel folding frame, the cloth bag filter element is arranged in the outer frame, the cloth bag is fixed by the support frame, and the medium-efficiency bag type filter is mainly used for removing particulate matters in air in a physical filtering manner. The medium-efficiency bag type filter has good air permeability and certain filtering precision, is widely applied, and is indispensable environment-friendly equipment in the electronic industry, the pharmaceutical industry, the food industry and the like.

The invention relates to the technical field of engineering plastics, in particular to a high-performance polyester composite material as well as a preparation method and application thereof. The high-performance polyester composite material is prepared from 35 to 60 parts of polybutylene terephthalate, 10 to 20 parts of brominated flame retardant, 2 to 6 parts of flame-retardant synergist, 1 to 5 parts of flexibilizer, 10 to 40 parts of glass fiber, 0.1 to 1 part of antioxidant, 0.1 to 2 parts of lubricant and 0.1 to 0.6 part of flow promoter, the intrinsic viscosity of the polybutylene terephthalate is 0.75 to 1.0 dl / g; the glass fibers comprise alkali-free short glass fibers and ground glass fibers; the flow promoter is a hyperbranched polymer containing hydroxyl. The high-performance polyester composite material provided by the invention has good comprehensive performance of high fluidity, low floating fiber, low warping and high strength, can be applied to the fields of automobiles and electronic and electric appliances, and particularly has good application prospects in thin-walled products with complex structures.

The invention belongs to the technical field of copper ion wastewater treatment methods, and particularly relates to a method for treating copper ion wastewater containing a thiourea complexing component, which comprises the following steps: step 1, collecting cleaning and discharging wastewater of an immersed plating wire by using a wastewater collecting device, according to the treatment method for the copper ion wastewater containing the thiourea complexing component, a continuous PH dosing unit is arranged according to the test condition of a pilot plant test to adjust the PH of the wastewater entering the micro-electrolytic tank, and in order to ensure that the PH value of the wastewater entering the micro-electrolytic tank is always lower than 3.5, backflow with the unqualified PH value is set in the PH adjusting process. When the microelectrolysis process is used for treating wastewater of an immersion plating surface treatment process in the electronic industry which adopts thiourea for complexing, the method has the advantages of simple treatment process, small use amount of chemicals and low power consumption; the microelectrolysis material filled in the wastewater is utilized to generate 1.2 V potential difference to carry out electrolysis treatment on the wastewater, so that the purpose of degrading organic pollutants is achieved.

The application discloses a preparation method of an ultrathin-wall special-shaped molybdenum sleeve, and belongs to the technical field of molybdenum sleeve preparation.The method comprises the following steps: 1, cutting a cold-rolled molybdenum foil to obtain a cut molybdenum foil; 2, winding and fixing the cut molybdenum foil on a core rod; 3, die pressing the fixed cut molybdenum foil together with the core rod to form a molybdenum pipe blank; 4, performing a shaping vacuum annealing on the molybdenum pipe blank together with the core rod to form a molybdenum pipe; 5, laser welding the molybdenum pipe to obtain a molybdenum pipe piece; 6, forming the molybdenum pipe piece into a special-shaped molybdenum pipe through a special forming die; and 7, cutting to obtain the ultrathin-wall special-shaped molybdenum sleeve.The ultrathin-wall special-shaped molybdenum sleeve prepared by the method has the advantages of bright inner and outer surfaces, small roughness, good consistency, high dimensional precision, high density, good mechanical properties, small energy consumption in the preparation process, low machining difficulty, low cost, high product yield, and the like, and is suitable for target material, hot-couple protection sleeves and sleeve fields for the electronic industry.

The invention discloses a brominated SIS thermoplastic elastomer and a preparation method thereof.The preparation method comprises the following steps that 1, allyl halide is subjected to a polymerization reaction, then 4-vinyl benzoic acid is added for an acidification reaction, and a ring-opening agent is obtained; step 2, carrying out epoxidation reaction on a polyisoprene chain segment in the SIS thermoplastic elastomer to obtain epoxidized SIS; and 3, carrying out a ring-opening reaction on the ring-opening agent and the epoxidized SIS to obtain the brominated SIS thermoplastic elastomer. The SIS thermoplastic elastomer improves the non-polarity problem and has good compatibility with other resins, and the pressure-sensitive adhesive prepared from the SIS thermoplastic elastomer has high bonding strength and can meet the requirements of new energy, high-end electronic industry and biomedical treatment on the pressure-sensitive adhesive.

The invention provides a sea urchin-shaped high-temperature-resistant functional composite material as well as a preparation method and application thereof. The high-temperature-resistant functional composite material has ultrahigh heat resistance and metal performance; the high-temperature-resistant composite material is a high-temperature-resistant composite material prepared from an organic polymer material and composite metal foam, or a high-temperature-resistant composite material prepared from an inorganic non-material and composite metal foam; the metal foam is a hollow metal ball or a hollow metal rod, and the size of the metal foam is micropore, mesopore or macropore; the metal foam is a metal foam of various metals or a composite metal foam (CMF). The preparation method is simple, low in cost, green and environment-friendly. The high-temperature-resistant composite material is used for aerospace, nuclear reactors, the automobile industry, the building industry, the communication industry, the shoemaking industry, the ship industry, the clothing industry, the electronic industry, batteries, the fitness industry, low-altitude economy, the humanoid machine industry, the military industry, the agricultural industry or the daily use industry and the like.

The invention belongs to the technical field of multi-stage treatment of water, and particularly relates to a process for removing urea micromolecules from reclaimed water in the electronic industry, which comprises the following steps: pumping the reclaimed water into a pretreatment tank, and adding a coagulant and a coagulant aid to aggregate suspended solids and colloidal particles into larger flocs; then, organic matters and small-particle impurities in the water are adsorbed, and the turbidity is reduced; recycled water is conveyed into the pretreatment cylinder through a liquid inlet pipe; a flocculating agent and a coagulant aid are added, so that suspended solids and colloidal particles are gathered into large flocs; after the flocculation is completed, adsorbing macromolecules by using an activated carbon plate; the wastewater with organic matter removed flows downwards to the flow guide plate, the flow guide plate is used for reducing the downward flowing speed of the wastewater, light ultraviolet radiation is provided in the pretreatment stage through the first ultraviolet lamp tube, partial degradation of macromolecular organic matter, turbidity reduction and bacteriostasis are achieved, and multi-stage treatment of water, wastewater or sewage in the pretreatment stage is achieved.

The application is a kind of electronic industry initial rainwater treatment system and method, comprising: collected initial rainwater is filtered by two stages to remove larger suspended solids and fine particles in water; pumped into the biological retention tank I chamber, flows through the adsorption filler layer to remove most of the heavy metal ions, fluoride ions and cyanate ions in water; the treated initial rainwater enters the biological retention tank II chamber by gravity, the rainwater stays in the biological retention tank II chamber to remove residual COD, fluoride ions, and the microorganisms in the chamber further remove COD and phosphate. The application has the advantages that: the adsorption filler layer can efficiently adsorb and remove heavy metals, fluorides and cyanides in rainwater, reducing the toxic effect on functional microorganisms in the biological retention tank; at the same time, the inverted electrolysis reinforced biological retention tank with upper cathode and lower anode can simultaneously reinforce the removal of COD and fluoride ions and other pollutants, so that the final effluent can meet the direct discharge standard requirements in the "Electronic Industry Water Pollutant Discharge Standard".

The invention relates to a technology for carrying out digital conversion on a mechanical register character wheel, in particular to a technology for carrying out digital positioning and coding on a character wheel angle by adopting a U-shaped magnetic core winding inductor as a sensor, the U-shaped magnetic core winding inductor carries out sensing by utilizing an electromagnetic field induction principle, and no light transmission requirement exists; the water meter has the advantages of being simple in structure, free of refraction and reflection phenomena caused by internal environment factors of the water meter, capable of completely adopting a waterproof treatment mode of a traditional electronic industry standard, namely high-density epoxy resin potting, enabling modules composed of components and a circuit board to be combined into a solid-state whole, and free of gaps. A photoelectric sensor which is low in technical content and not suitable for an underwater environment is not used any more, and an electromagnetic sensor which is more suitable for the underwater environment is adopted, so that the whole electronic module is simple and stable in process, greatly improved in waterproof standard, durable in use and suitable for popularization and application. The water meter is particularly suitable for being used in a wet-type water meter.

Belonging to the technical field of high purity chemical preparation, the invention provides an electronic grade caustic soda purification production process, which comprises the following steps: S1, preheating a solar photovoltaic NaOH solution to 55 + / -2 DEG C, and then carrying out precision filtration through a titanium sintered felt dynamic cross-flow filter; s2, regulating the temperature of the filtered NaOH solution to 45 + / -2 DEG C, and sequentially carrying out adsorption purification through a strong acid resin column and phosphoramidate chelate resin; s3, heating the purified NaOH solution to 45 + / -1 DEG C, removing residual particles through a polytetrafluoroethylene folded filter element filter, preheating to 60 + / -1 DEG C, and concentrating in a falling film vacuum concentrator; and S4, quickly cooling the concentrated solution to 35 DEG C through a titanium corrugated pipe cooler, and then filling nitrogen for sealed storage. According to the process, the solar photovoltaic NaOH solution can be purified into the electronic-grade caustic soda through the working procedures of dynamic cross-flow filtration, resin enhanced adsorption, precise filtration, vacuum concentration and the like, the concentration reaches 47.0 + / -0.5%, and the ultra-pure reagent requirements of the electronic industry such as semiconductors and display panels are met.

The application discloses an epoxy resin composite Sn-Bi-Sb lead-free soldering paste and a preparation method thereof, and belongs to the field of soldering materials of metal materials and metallurgy. The epoxy resin composite Sn-Bi-Sb lead-free soldering paste is composed of 3-6% of a mixture of an epoxy resin, a curing agent and an accelerator, 1.5-5.0% of nano silver paste, and the balance of a commercial Sn-Bi-Sb soldering paste. In the mixture of the epoxy resin, the curing agent and the accelerator, the mass percentage of each component in the composition is epoxy resin: curing agent: accelerator = 100: 70-85: 4-9. The epoxy resin composite Sn-Bi-Sb lead-free soldering paste has good wetting and spreading performance, can significantly improve the shear strength and drop resistance of a soldering joint, and can be used for reflow soldering of some products in the electronic industry which have specific requirements for temperature and drop resistance.

The application discloses a kind of high organic matter removal anti-pollution polyamide reverse osmosis membrane and its preparation method and application, the polyamide reverse osmosis membrane, polyester non-woven fabric layer, polysulfone ultrafiltration support layer, polyamide separation bottom membrane layer and hydrophilic polymer anti-pollution layer are included in sequence;The polyamide separation bottom membrane layer is the crosslinked polymer formed by the interfacial polycondensation reaction of polyamine and polyacyl chloride;The hydrophilic polymer anti-pollution layer is the polymer formed by the crosslinking reaction of diblock hydrophilic polymer comprising pyrrolidone segment and amino segment and small molecular compound comprising epoxy group and / or allyl group.The polyamide reverse osmosis membrane of the application has good application prospect in the field such as organic matter removal in electronic industry pure water, trace organic matter removal in domestic drinking water and the like.

The present disclosure relates to a solvent-free moisture curing silicone conformal coating used for the surface protection of circuit boards in the electrical and electronic industries and a preparation method thereof. The solvent-free moisture curing silicone conformal coating comprises (A) a hydrolyzable functional group-terminated linear polysiloxane (I); (B) a hydrolyzable functional group-containing silicone resin with a three-dimensional structure (II); (C) a hydrolyzable functional group-containing crosslinking agent; (D) a catalyst; (E) an adhesion promoter. The solvent-free conformal coating of the present disclosure has low viscosity, high strength and good toughness, and can meet the traditional coating process such as spraying, brushing, dipping, etc., while satisfying the surface protection of the circuit board. Compared with the traditional solvent-based silicon conformal coating, the solvent-free silicon conformal coating can be cured by moisture, the VOC content released during the curing process is low, and the harm to the environment and occupational health is small.

This invention discloses an adaptive adjustment system and method for air circulation function in cleanrooms for the electronics industry. The adjustment system includes a three-dimensional grid monitoring module, a data processing module, a visualization module, a computer vision module, an intelligent decision-making module, and an air circulation control module. The adjustment method includes three-dimensional grid sensor layout and monitoring, data processing, data visualization, image feature extraction, abnormal area early warning, air circulation parameter decision-making, adaptive adjustment execution, and closed-loop feedback optimization. By constructing a continuous spatial distribution model from real-time monitoring data of the three-dimensional grid sensors and converting it into a dynamic, visualized three-dimensional heat map, the correlation between environmental characteristics and air circulation control quantities is further established. Based on local pollution anomalies, airflow control parameters are output, which can significantly improve the system's adjustment accuracy for complex operating conditions and realize adaptive adjustment and continuous evolution of air circulation function.

The invention discloses a hot melt adhesive as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The hot melt adhesive provided by the invention is prepared from the following raw materials: PA66 resin, low-molecular-weight polyamide, a thermoplastic elastomer, a hydrophobic nanofiller, a tackifier, a flame retardant, a coupling agent and the like. The high-performance PA66-based hot melt adhesive, which is finally obtained through refined formula design, introduction of a plurality of functional aids and reasonable adjustment of the proportion of all components, has the following advantages: the high-performance PA66-based hot melt adhesive has high temperature resistance and can be used for a long time at 150-200 DEG C, and the performance retention rate after thermal aging is greater than or equal to 90%; the moisture absorption is ultralow, and the water absorption rate is less than or equal to 0.3% (24 hours, 23 DEG C); the insulating property is high, and the volume resistivity is greater than or equal to 1016 omega.cm; the flame retardance reaches the UL94 V-0 level; the adhesive is wide in base material adaptability, and has excellent bonding strength on metal, ceramic, plastic, composite base materials and the like; low gas release is achieved, and the electronic industry clean room standard is met.