88results about How to "Improve cohesion" patented technology

The invention discloses a discrete manufacturing multi-view BOM dynamic derivation method and system based on a tree-shaped network structure, and belongs to the technical field of intelligent manufacturing and product data management. The method comprises the following steps: constructing a tree body as a single product data source, and storing a hierarchical relationship, attribute definition and engineering semantics of a product in a tree structure; based on the tree body, dynamically matching derivation rules through a mesh mapping relation library; executing rule matching, semantic verification, structure reconstruction and dictionary verification by utilizing a dynamic view derivation engine to generate a target BOM view; semantic constraint and verification are carried out on the derivation process through a BOM data dictionary module; and realizing access control and audit based on role, scene and data sensitivity through the security and authority control module. According to the method, a new generation of xBOM dynamic derivation architecture which takes a tree form as an ontology, takes a net form as mapping, is configurable in rule and is strong in data specification is constructed; the fundamental problem of discrete manufacturing multi-view BOM management is solved, and engineering rationality and service flexibility are both achieved.

The invention discloses a construction method for excavating an upside-down well wall of a deep foundation pit under an eccentric compression working condition. The construction method is suitable for an asymmetric load scene that the soil covering height of one side of a vertical shaft is obviously larger than that of the other side of the vertical shaft. The method comprises the steps that firstly, grouting is conducted on the periphery of the shaft wall of a vertical shaft under the current ground, and a soil body reinforcing area is formed; then, a mouth locking ring beam is constructed at a shaft mouth of the vertical shaft, an upper structure comprising a retaining wall, a reverse pressing plate, a retaining wall ring beam and a plate support is upwards constructed on the mouth locking ring beam, and soil covering side earthwork is synchronously backfilled to the level ground elevation in the construction process; next, an upside-down well wall method is adopted for subsection downward excavation, an annular arch frame, angle braces and anchor rod supports are constructed after each section is excavated, and an upper ring beam and a lower ring beam are arranged at the horsehead position and connected with the adjacent arch frames through vertical supports; and finally, concrete bottom sealing is conducted on the shaft completion face. The anti-overturning moment is formed through the reverse pressing plate and synchronous backfilling, and the problem of well wall instability caused by eccentric loads is effectively solved in combination with a multi-stage supporting system.

The utility model discloses a wastewater treatment device for anhydrous acetonitrile production, which comprises a mixing tank and a sedimentation tank which are communicated through a suction pump. A feeding hole is formed in one side of the top of the mixing tank, a flow guide plate is fixed on one side of the inner wall of the feeding hole, a wastewater input pipe and a medicament input pipe are arranged on the flow guide plate, and flow dividing bulges are also arranged on the inner wall of the flow guide plate; a bearing plate is arranged on the inner bottom wall of the sedimentation tank, positioning plates are fixed to the two sides of the bearing plate, and an electric heating rod is further arranged in an inner cavity of the bottom of the sedimentation tank. And the two treatment modes of mixing and precipitation are carried out separately and do not interfere with each other, so that the effect is better.

The application relates to a production and processing method of a carded cotton-wool blended yarn, which comprises the following steps: A, selecting cotton fibers with a micronaire value of 4.8 and a length of 29 mm, and selecting washed and cleaned wool tops with a count of 80; B, respectively dyeing the cotton fibers and the wool tops; C, feeding the colored cotton fibers into a carding machine to be carded, and then feeding the slivers carded by the carding machine into a wool carding machine to be carded; D, opening the colored cotton slivers by an opener to form cotton loose fibers; E, mixing the cotton loose fibers with the colored wool loose fibers, and stewing the wool for 12 hours; F, feeding the mixed wool and cotton into a two-union wool carding machine to be carded, feeding the wool and cotton into a three-union wool carding machine to be carded after the carding of the two-union wool carding machine is completed, and making wool lap roving; G, performing spinning on the wool lap roving by a mule machine to obtain a carded cotton-wool blended yarn, so that the produced cotton-wool blended yarn is low in twist, large in elasticity, good in hand feeling and good in fluffiness.

The invention provides a pole piece of a lithium ion battery and a preparation method of the pole piece, the pole piece of the lithium ion battery comprises a current collector and an active material coated on the current collector, and by arranging the active material and an adhesive, the active material can be conveniently and rapidly fixed when being extruded and arranged on the current collector along an angle; the assembly state of the active material on the current collector is stabilized, the active material is placed in the slit die cavity to be extruded, the active material moves and deforms towards the single side direction, so that the structure becomes long and narrow, and the end part of the long and narrow active material is connected with the current collector to be rolled, so that the tortuosity of the lithium ion battery pole piece is reduced, and the service life of the lithium ion battery pole piece is prolonged. And the migration rate of lithium ions in the pole piece and the embedding rate of the lithium ions in the active material are accelerated, meanwhile, the problem that the pole piece is expanded and increased due to lithium ion embedding in the thickness direction of the pole piece is solved, and the probability of deformation of the lithium ion battery is reduced.

This invention relates to a blending process for hemp fiber and sorona fiber, belonging to the technical field of blending and processing of natural fibers and bio-based elastic fibers. The blending process for hemp fiber and sorona fiber of this invention includes the following steps: raw material selection → pre-spinning process → post-spinning process → packaging. This invention solves the problems of poor spinnability, high breakage rate, and stiffness and wrinkling in pure wet-spun hemp through specific proportions and wet spinning processes, achieving high-count, stable, and high-quality production. This significantly improves spinnability, enhances yarn quality, and greatly improves hand feel and comfort, achieving high elasticity and comfort to meet user needs.

The application discloses a salt-resistant water-non-dispersible material for oil well cement and a preparation method thereof. The salt-resistant water-non-dispersible material for oil well cement comprises the following components in the form of weight parts: 100 parts of N,N-dimethyl acrylamide, 3-6 parts of acrylic acid, 10-20 parts of 2-acrylamide-2-methylpropanesulfonic acid, 5-15 parts of a cyclic monomer, 0.1-0.4 parts of a branching agent, 5-15 parts of a cationic monomer, 0.3-3 parts of a crosslinking agent and 400-500 parts of water. The salt-resistant water-non-dispersible material prepared by the application has good salt resistance, can significantly improve the anti-dispersion performance of the cement slurry when used in a salt water and sea water cement slurry system with a NaCl content of 18 wt% or less, and has excellent rheological performance.

This invention discloses a method for preparing rare earth metals by electrolytic oxides using a fluoride system, belonging to the field of rare earth metal preparation technology. This invention modifies graphite anodes used in rare earth molten salt electrolysis. It improves oxidation and corrosion resistance, reduces anode wear, lowers replacement frequency, and increases production efficiency, yielding high-purity, low-carbon rare earth metal lanthanum. A three-dimensional network framework material is constructed using Prussian blue self-assembly and SiC is deposited to obtain a composite framework material. During pre-calcination with graphite and other materials, the derivatives optimize the crystal structure and interfacial bonding, enhancing the strength of the pre-shaped anode material and ensuring the integrity and performance stability of the electrode structure. Thirdly, the pre-shaped anode material is impregnated with a specific impregnation solution, altering the gas diffusion path and resistance, inhibiting oxidation reactions, and high-temperature sintering generates substances that fill the pores, forming a dense microstructure. Simultaneously, the compounds formed by phosphoric acid enhance cohesion and adhesion, improving oxidation and molten salt corrosion resistance, and extending the service life of the graphite anode.

The present application relates to the technical field of gel electrolyte for supercapacitor, in particular to a gel electrolyte based on lysozyme amyloid fibers and application thereof. The ion conductivity of the conventional plant protein-based gel electrolyte is poor, and the electrical performance needs to be further improved. In view of the above problems, the present application provides a gel electrolyte based on lysozyme amyloid fibers. The lysozyme in the formula self-assembles into amyloid fibers under acidic conditions, and the surface of the amyloid fibers is rich in polar groups such as hydroxyl, carboxyl and amino groups, which can effectively promote the dissociation of lithium salt. At the same time, the three-dimensional network structure formed by the self-assembly of the fibers. Glycerol as a small molecule plasticizer inserts between the polymer chains. Lithium perchlorate and other lithium salts can provide high concentration of free lithium ions due to the large anion volume and low dissociation energy. The above components synergize and jointly act, effectively improving the comprehensive electrical performance of the gel electrolyte.

The invention discloses application of ginseng leaf polysaccharide in relieving fish quality decline caused by water hypoxia, and belongs to the technical field of aquatic product culture. The ginseng leaf polysaccharide is applied to relieving fish quality decline caused by water hypoxia for the first time, and by adding the ginseng leaf polysaccharide, the problems of fish muscle oxidative damage, poor texture property, low nutritional value and the like caused by hypoxia stress can be effectively improved; the invention provides a new relieving technology for improving fish quality decline caused by hypoxia in culture, provides technical support for improving fish quality of cultured fishes under intensive culture conditions, improves freshwater fish culture benefits, and solves the problem of lack of a safe and reliable method for relieving fish quality decline caused by hypoxia in a water body at present.

The present application relates to strata gas drilling technology field, specifically disclose a kind of coalbed gas mining special throttle manifold, including throttle module, for realizing fluid pressure regulation, fluid cut-off and parameter detection;Kill module, for injecting kill medium into wellbore, realize well pressure balance;Solid-liquid separation module, for separating solid impurities in fluid;Connecting pipeline module, for realizing the communication between each functional module and module and blowout preventer, wellbore;Flange interface module, for realizing the detachable connection between each module;Wherein, the input end of throttle module is used to be connected blowout preventer outlet flange by connecting pipeline module, the output end of throttle module is connected with the input end of solid-liquid separation module by connecting pipeline module.The present application is specially used in coalbed gas mining process to control wellhead pressure, realize kill operation, etc., with the characteristics of modularization, easy to assemble and maintain quickly.

The invention relates to the field of refining and application of wood fiber biomass, and discloses a lignin-based formaldehyde-free adhesive, a lignin-based plywood and a preparation method and application of the lignin-based formaldehyde-free adhesive and the lignin-based plywood. The lignin-based formaldehyde-free adhesive disclosed by the invention comprises the following components: L-cysteine lignin, and the solid content of the lignin-based formaldehyde-free adhesive is 10-45wt%. The method comprises the following steps: mixing an aqueous solution of L-cysteine hydrochloride and lactic acid with raw materials for pretreatment; performing extraction and vacuum filtration on the obtained suspension to obtain dissolved lignin and hemicellulose filtrate, and performing extraction and purification on the filtrate to obtain L-cysteine lignin; the lignin-based formaldehyde-free adhesive is prepared by uniformly dispersing the L-cysteine lignin in water. According to the invention, the used solvent is green and nontoxic in source, the hydrated lignin-based adhesive with good fluidity is prepared with low solid content, and the prepared plywood shows excellent dry and wet bonding strength, solvent resistance and weather resistance, and meets the preparation requirements of national I-class plywood.

This utility model relates to the field of food testing technology and discloses a multi-layer membrane negative pressure rapid filtration device for food testing samples, including a first filter cylinder and a second filter cylinder. The second filter cylinder has a multi-layer membrane body arranged inside, and the output end of the drive motor is connected to a stirring shaft. This utility model fixes a support plate on both sides of the inner wall of the first filter cylinder, and a second positioning column is fixed on the top of the support plate. A second filter plate is assembled above the support plate. Therefore, during operation, the material first passes through multiple layers of filtration within the multi-layer membrane body. This process can be aided by a negative pressure pump to provide a negative pressure environment, thus forming a multi-layer membrane negative pressure filtration. The first and second filter cylinders can be connected and assembled on both sides using connecting plates. During assembly, fixing bolts are used to connect and fix the first filter cylinder to the connecting plate and the connecting plate to the second filter cylinder, thereby improving the connection and assembly capability during operation.

The utility model belongs to the technical field of self-adhesive labels, in particular to a flexible self-adhesive label suitable for curved surface adhesion, which comprises an outer layer, and a printing layer and a protective layer are sequentially coated on the upper surface of the outer layer from bottom to top. According to the flexible self-adhesive label suitable for curved surface pasting, the flexible self-adhesive label suitable for curved surface pasting is arranged and can adapt to curved surface pasting, the middle layer is made of silicon rubber, and controllable and local deformation (such as groove widening / deepening) can be generated when the label is subjected to bending or stretching stress through the stress release groove microstructure; therefore, stress is efficiently absorbed and dissipated, failure caused by the fact that the stress is transmitted to the edge of the label or the interface of the bonding layer is prevented, the stressed stress can be dispersed through the wave grooves, and the situation that the middle layer of the label is broken after being bent multiple times due to stress concentration is avoided.

The utility model relates to seasoning device technical field especially relates to a continuous seasoning device, including base, the base top end is installed with outer frame, the top of outer frame is rotatably connected with support frame, the other end fixedly connected with fixed barrel of support frame, be equipped with synchronous seasoning assembly in fixed barrel, synchronous seasoning assembly drive connection has a plurality of seasoning barrels. The utility model discloses through adopting planetary gear system drive multiple independent seasoning barrels synchronous operation, through a plurality of independent seasoning barrels can be used for the subpackaging different seasoning and the food to be seasoned, thereby can simultaneously to the product of multiple tastes seasoning operation, and after part product seasoning ends can be individually taken down, to the rest seasoning barrel does not cause the interference, makes seasoning can continue to carry out, and the better convergence makes seasoning can continue to carry out, the better convergence helps to improve the efficiency of seasoning.

This invention discloses a method for risk assessment of river sand mining anomalies based on multi-source monitoring data. The method extracts river anomaly features from multi-temporal satellite remote sensing data, UAV remote sensing data, and spatially constrained data. It then normalizes these features to calculate a comprehensive anomaly index, filters suspected anomaly candidate areas based on the index, and conducts risk assessments on these areas. After UAV inspection and verification of these candidate areas, high-risk areas confirmed by the UAV undergo 3D verification. Finally, the results are output and the data archive is updated. This invention achieves screening of suspected anomaly areas in rivers, risk classification, UAV verification, 3D evidence chain verification, and dynamic updating of inspection archives. This improves the timeliness of detecting suspected illegal sand mining anomalies in rivers, thus providing more efficient and reliable technical support for river sand mining supervision.

The present application relates to the technical field of pressure sensitive adhesive, in particular to a plastic film type low VOC environment-friendly pressure sensitive adhesive product.The plastic film type low VOC environment-friendly pressure sensitive adhesive product is composed of the following raw materials: methyl methacrylate, butyl acrylate, diacetone acrylamide, 2-ethylhexyl acrylate, vinyl trimethoxysilane, hydroxyethyl acrylate, reactive emulsifier, anionic emulsifier, non-ionic emulsifier, ammonium persulfate, sodium bisulfite, adipic acid dihydrazide, sodium bicarbonate, nano calcium carbonate, deionized water and pH regulator.The plastic film type low VOC environment-friendly pressure sensitive adhesive product has excellent holding power, peeling strength, durability and environmental protection.

The application discloses a shotcrete rebound-reducing agent and a preparation method thereof. The shotcrete rebound-reducing agent is prepared from the following raw materials in mass percentage: 15-30% of a quick-setting component, 2-5% of a viscosity-increasing component, 10-15% of a reinforcing component, 2-5% of an anti-freezing component, 1-4% of a stabilizer, and the rest of water; and the viscosity-increasing component is a combination of polyvinylpyrrolidone and modified carboxymethyl cellulose. The prepared shotcrete rebound-reducing agent has the advantages of good sprayability, high hourly strength, good anti-freezing and stability, and the like, can improve the working performance of shotcrete, reduce the content of a quick-setting agent and significantly reduce the rebound rate of shotcrete, and has good economic benefits.

The utility model provides pickling wastewater treatment equipment, which relates to the technical field of stainless steel pickling wastewater treatment and comprises a treatment box provided with a liquid inlet channel and a liquid outlet channel. The device further comprises a non-contact liquid level sensor, an electronic prompting piece, a stirring assembly, an alkali liquor adding assembly, a flocculating agent adding assembly, a pH value detection assembly, a first limiting frame, a filtering assembly, a temporary storage assembly, a first telescopic cylinder, a circulation channel, a second limiting frame and a screening piece. According to the device, the filtering piece and the screening piece can be conveniently replaced on the basis of treating the acid wastewater, so that the stable treatment effect of the acid wastewater is ensured, and meanwhile, the pH value can be accurately obtained in the neutralization and heavy metal precipitation processes of the acid wastewater, so that heavy metal is completely precipitated; after the heavy metal precipitate is generated, a flocculating agent is added to promote the heavy metal precipitate to coagulate into large flocs, and finally the electromagnetic valve is opened to separate the heavy metal precipitate, namely effective solid-liquid separation.

The application discloses a kind of anticorrosive mortar for pipeline and preparation method thereof, belong to building material technical field.The anticorrosive mortar for pipeline, by weight parts, including: by silicate cement 100-200 parts, slag 100-200 parts and gypsum 20-30 parts constitute low-heat micro-expansion cementitious system, high-alumina cement 20-30 parts, mechanism sand 500-600 parts, latex powder 15-20 parts, water reducing agent 0.5-1 part, inorganic antibacterial agent 0.5-3 parts and water 90-110 parts.The application constructs binary cementitious system by utilizing low-heat micro-expansion system and high-alumina cement, utilizes the synergistic reaction of slag, gypsum and cement hydration product, directional generation appropriate ettringite to compensate shrinkage, significantly improves the bonding strength of anticorrosive layer and pipeline base surface, while high-alumina cement hydration produces calcium aluminate hydrate and aluminum hydroxide colloid, endows mortar with excellent acid, alkali and salt corrosion resistance.The process of the application is simple, low in cost and green, and can effectively solve the corrosion failure problem of water supply and drainage pipeline in complex chemical environment.

The utility model discloses a transmission device for glass curtain wall production, which belongs to the technical field of glass curtain wall production and transmission, and adopts the technical scheme that the transmission device comprises a damping structure, a controller is arranged on the left side of the damping structure, support plates are arranged on two sides of the top of the damping structure, and a transmission structure is arranged on the inner sides of the support plates; according to the glass conveying device, through mutual cooperation of the conveying structure and the limiting auxiliary conveying mechanism, the glass conveying quality and efficiency are greatly improved, and when glass is placed on the conveying structure to be conveyed, a controller can start a servo motor, drive a two-way lead screw to rotate and drive threaded blocks on the two sides to make a limiting plate move inwards; the limiting width is flexibly adjusted, the rubber wheels in the extrusion frame make contact with the outer sides of the rectangular glass with different widths, precise limiting is achieved, and in the conveying process, the rubber wheels can assist the glass in rotating conveying, reduce friction resistance and ensure smooth conveying.

The utility model discloses a low air pressure humidity test box which comprises a first machine shell, a second machine shell is fixedly connected to the first machine shell, a vacuum pump is fixedly connected in the second machine shell, the input end of the vacuum pump is communicated and connected with a water vapor separation assembly, the water vapor separation assembly comprises a separation tank, and a reversing plate is fixedly connected in the separation tank. A reversing pipe is fixed to the reversing plate in a penetrating mode, and an air outlet hole is formed in the reversing pipe. The water vapor separation assembly is additionally arranged at the input end of the vacuum pump and enables air to generate rotational flow through the reversing pipe, the reversing plate and the separation tank, water vapor in the air is preliminarily separated through the centrifugal effect, and condensation of the water vapor is promoted by additionally arranging the refrigeration pipe on the reversing pipe; the baffles are additionally arranged in the air outlet holes at intervals to further block and separate water vapor, so that the separation effect is guaranteed, the water vapor is prevented from invading the vacuum pump, the service life of the vacuum pump is prolonged, and the assembly has the advantages of being long in service life and free of frequent maintenance and has good practicability.

This invention relates to the field of solid waste cementitious material preparation technology, specifically to a rapid-setting and hardening cementitious material based on calcium aluminoferrite from all solid waste and its preparation method, comprising the following steps: S1. Mixing and stirring modified red mud, carbide slag, mineral powder, and modified mineralizer evenly, and then pressing into shape; S2. Performing a first-stage calcination, calcining from room temperature to 950-1000℃, and then performing a second-stage calcination to 1220-1300℃ and holding at that temperature for 30-120 minutes, and cooling to room temperature to obtain modified mineral phase clinker; S3. Passing through a 200-mesh square hole sieve, mixing with modified multi-element solid waste mineral materials in a mixer, and stirring evenly to obtain the rapid-setting and hardening cementitious material based on calcium aluminoferrite from all solid waste. This invention significantly reduces the calcination temperature of clinker through the synergistic effect of various raw materials, thereby greatly reducing energy consumption and carbon emissions. The complex ionic reaction mechanism and the complementary physicochemical properties of multi-component solid waste enrich the diversity of hydration products and the density of the gel structure, thus ultimately achieving the excellent performance of "fast setting, fast hardening, and high strength" of the all-solid waste cementitious material.

This invention relates to the field of coating technology and discloses a high-bonding-energy rare-earth nano-coating, its preparation method, and its application. The coating of this invention comprises 35-52 parts by weight of silica, 12-23 parts by weight of hydroxide, 0.3-0.8 parts by weight of lanthanum complex, and 26-34 parts by weight of filler, etc. The lanthanum complex tightly bonds the metal substrate to the silicate coating, improving the bonding energy and adhesion strength between the coating and the metal substrate, making the coating less prone to peeling. The lanthanum complex contains phthalonitrile groups. During high-temperature heat treatment, phthalonitrile undergoes self-crosslinking and cyclization to generate phthalocyanine and other aromatic heterocyclic structures with high-temperature resistance, which is beneficial to improving the heat resistance of the coating. Simultaneously, the formed chemical crosslinking system enhances the crosslinking degree within the silicate coating, inhibiting the entry of corrosive media such as acids and alkalis into the coating matrix, and improving the coating's resistance to acid and alkali corrosion.

This utility model relates to the field of deep foundation pit construction technology, specifically a grouting device for deep foundation pit construction. It includes a base plate, a storage tank mounted on the base plate, a water pipe connected to the bottom of the storage tank, a water pump connected to one side of the water pipe, and a first screw installed within a fixed frame. This utility model, through the cooperation of the base plate, storage tank, water pipe, water pump, inlet, fixed frame, first screw, first drive motor, moving plate, nozzle, fixed frame, second screw, second drive motor, moving block, first electric telescopic rod, and clamping block, allows the grouting device to grout from the bottom of the deep foundation pit, simultaneously and evenly grouting the interior, ensuring effective reinforcement of the deep foundation pit, enhancing the bearing capacity of the foundation, and increasing the cohesion and shear strength of the foundation soil. This helps reduce foundation deformation and settlement, improving the overall stability of the foundation. In deep foundation pit engineering, the stability of the foundation is directly related to the safety and stability of the project.

The utility model relates to the technical field of building construction, in particular to a mortar spraying device for building construction, which comprises a box body, a rotating device is fixedly connected to the front part of the right end of the box body, a connecting device is fixedly connected to the lower part of the left end of the box body, and rotating rods are fixedly connected to the left end of a second gear block and the left end of a first gear block. A plurality of rotating shaft blocks are fixedly connected to the outer surfaces of the two rotating rods, a plurality of stirring blades are fixedly connected to the outer surfaces of the rotating shaft blocks, and the driving motor is fixedly installed on the front portion of the right end of the box body. According to the mortar spraying device for building construction, all-directional uniform stirring of mortar is achieved through the double rotating rods and the specially-arranged stirring blades, the construction quality is improved, scattered mortar is collected through the detachable collecting box and the hook clamping and receiving structure, equipment storage is facilitated, and the mortar spraying device is convenient to use. The cost is saved; and the construction management is optimized.

The present application relates to the technical field of carbon-coated current collector, in particular to a preparation method of high-rate carbon-coated aluminum foil current collector for lithium battery, the present application improves the cohesion of the slurry and the contact with the surface of the aluminum foil through the modification of the binder, thereby effectively coping with the volume change caused by the deintercalation and intercalation of lithium ions at high rate, ensuring the stability of the electrode material during high-rate charge and discharge process. The present application also uses lithium methacrylate and butyl acrylate as monomers to prepare a polyacrylate binder, and adds hexamethylene diisocyanate to enhance the compatibility between the binder and the graphene loaded with carbon powder, so that the graphene loaded with carbon powder is more uniformly dispersed in the polyacrylate binder, the peeling strength of the carbon-coated aluminum foil current collector is enhanced, the capacity retention is improved, and the performance of the battery is improved.

The application discloses a composite polycarboxylic acid water reducing agent and a preparation method thereof, and relates to the technical field of composite polycarboxylic acid water reducing agents. The composite polycarboxylic acid water reducing agent is composed of the following components in a mass percentage: polycarboxylic acid water reducing agent mother liquor: 60-85%; slow-release slump retaining component: 5-20%; viscosity adjusting component: 3-15%; functional adjusting component: 0.1-5%; and the balance is water. The polycarboxylic acid mother liquor containing multiple active groups in the main chain provides an initial high water reducing rate, and the special slump retaining component with slow-release adsorption characteristics is used, so that the slump loss is basically zero for more than 2 hours, and the slump loss problem under high temperature and long distance transportation is solved. The modified lignin sulfonate is introduced as the viscosity adjusting component, which can effectively improve the cohesiveness and fluidity of low water-binder ratio concrete, so that the concrete is more easily pumped and constructed, and is particularly suitable for self-compacting concrete.

This invention relates to a method for preparing low-pore-count, high-cohesion, and high-strength nylon 6: Nylon 6 chips with a moisture content of 350-450 ppm are extruded through a screw extruder and quantitatively conveyed to a spinning assembly by a metering pump to form fibers. The radial cross-section of the fibers has several hooks spaced along the circumferential direction. The extruded fibers are sequentially fed into a slow cooler and a monomer suction device, and then uniformly cooled by side blowing to form filament bundles. The filament bundles are fed into a spinning bundle strengthening oiling device with an oil nozzle, guide hooks, and a blower bundle, allowing several filament bundles to be oiled by the oil nozzles and their corresponding guide hooks. Finally, the several filament bundles enter the blower bundle together and are hooked together by compressed air. The oiled and bundled filament bundles are sent to a pre-networker to blow the oil agent evenly onto the filament bundles, and then stretched and heated by a first and second roller, and disturbed by a main networker. After the spinning tension is adjusted by a guide disc, the filament bundles are wound into a filament cake at the winding head. The high-strength nylon 6 filament bundles prepared by this method have strong cohesion and are not easily separated under external force. When woven into fabric, they can play a very good anti-snagging role.

The invention discloses a protective coating for the surface of an electronic component and a preparation method thereof, and relates to the technical field of coatings. The coating is prepared from the following raw materials in parts by mass: 100 parts of epoxy modified acrylate copolymer, 8 to 9 parts of butyl acetate, 6 to 7 parts of propylene glycol methyl ether acetate, 6 to 7 parts of isododecane, 4 to 6 parts of modified boron nitride nanotube, 3 to 5 parts of synergist, 0.2 to 0.4 part of 2-methylimidazole, 0.1 to 0.3 part of defoaming agent, 0.2 to 0.4 part of flatting agent and 0.1 to 0.3 part of sterilizing agent. The epoxy modified acrylate copolymer, the modified boron nitride nanotube, the synergist and other components are introduced, so that the adhesive force, impact resistance, wear resistance, weather resistance, aging resistance, dielectric strength, volume resistivity and high-frequency signal adaptability of the protective coating are effectively improved while the weldability of a lead of an electronic component is not affected. Therefore, the method has a wider application prospect.