85results about How to "Improve water absorption" patented technology

The invention discloses a fiber foamed concrete and a preparation method thereof. The fiber foamed concrete comprises the following raw materials in parts by weight: 5290 parts of cement, 4965 parts of water, 1.361 part of foaming solution, 1.2964 part of fly ash and 10 parts of fiber. The preparation method comprises the following steps: proportionally weighing the components; sequentially adding the cement and fly ash into a stirrer, proportionally weighing the water, uniformly stirring the mixture by the stirrer, and adding the fiber; preparing and adding the foaming solution; gradually adding the foam into the mixture, and continuously stirring until all the components are uniformly mixed; pouring the mixture into a mold on which lubricating oil is brushed, and curing in a curing chamber; after 24 hours, removing the mold; and respectively curing for 3 days, 7 days and 28 days for experimental detection. The fiber foamed concrete has the advantages of favorable thermal insulation property, favorable compression resistance and favorable bending resistance, and is applicable to a railway bed strengthening layer.

The invention discloses polymer-based anti-crack concrete and a preparation method thereof, and relates to the technical field of concrete. When the polymer-based anti-crack concrete is prepared, acrylic acid is grafted on the surfaces of pretreated polypropylene particles to prepare modified polypropylene particles; coating sodium metasilicate with sodium alginate to prepare a self-repairing microcapsule; the preparation method comprises the following steps: hydrolyzing 3-glycidyl ether oxypropyl trimethoxy silane, and grafting the hydrolyzed 3-glycidyl ether oxypropyl trimethoxy silane on the surface of silicon dioxide to prepare modified silicon dioxide; mixing the modified polypropylene particles, basalt fibers and polyacrylonitrile fibers to obtain a solid functional component; cement, slag powder, silica fume, an expanding agent, a solid functional component, modified silicon dioxide, a water reducing agent, an air entraining agent, deionized water, river sand, gravel and the pre-wetted self-repairing microcapsule are mixed, and the polymer-based anti-crack concrete is prepared. The polymer-based anti-crack concrete prepared by the invention has excellent anti-crack, freeze-thaw-resistant and self-repairing properties.

The application belongs to the technical field of functional polymer materials, and particularly relates to an antistatic water-absorbing polypropylene-based material and a preparation method and application thereof. The antistatic water-absorbing polypropylene-based material comprises, in mass fraction, 24-33% of polypropylene (PP), 5-20% of a PP-g-X graft copolymer, and 56-63% of a molecular sieve, wherein the molecular sieve is dispersed in a continuous phase composed of the PP and the PP-g-X; X in the PP-g-X graft copolymer represents a polyethylene glycol derivative graft segment, and a grafting rate is 0.2%-0.7%; and the average particle size of the molecular sieve is 1-10 microns. Compared with the prior art, the polyethylene glycol segment in the application has strong hygroscopicity, can actively absorb and fix trace water vapor in the package, has a similar "self-drying" effect, and reduces the internal equilibrium relative humidity of the package; the physical adsorption cavity provided by the molecular sieve and the chemical water absorption of the PP-g-X produce a synergistic effect, provide an ion conduction path for static charges, and improve the antistatic performance.

The application discloses a kind of water-based hydrophilic functional coating, hydrophilic flocking belt and preparation method, the water-based hydrophilic functional coating includes the following components: film-forming material, deionized water, defoaming agent, wetting agent and thickening agent, the film-forming material includes hydrophilic resin and amphiphilic active resin, the amphiphilic active resin contains hydrophilic and lipophilic group, for realizing directional arrangement.The water-based hydrophilic functional coating provided by the application can improve the wear resistance and the wiper cleaning performance of the flocking belt, significantly reduce the influence of the residual water stain on the line of sight after the glass is lifted, ensure that the side window glass provides a good view in rainy days or specific environments, and improve the safety performance.

The invention belongs to the technical field of cleaning supplies, and particularly relates to a cleaning tool which comprises a mop and a mop bucket body, and a clean water area and a placement area are arranged in the mop bucket body; the mop comprises a mop head and a mop rod which are hinged to each other, and a plurality of long wiping strips are arranged below the mop head; the water throwing basket is rotationally connected into the mop bucket body, and the bottom of the water throwing basket is divided into a cleaning area and a water storage area; and a locking device is arranged on the spin-drying basket / mop bucket body. When the locking device takes effect, the mop head is placed in the water throwing basket, the mop head rotates, the water throwing basket is static relative to the bucket body of the mop bucket, the liquid outlet device in the clean water area discharges liquid, clean water flows to the long wiping strip and the water storage area, and the long wiping strip can be cleaned through the cleaner in the water throwing basket. When the locking device does not take effect, the liquid outlet device does not discharge liquid, the mop head can drive the water throwing basket to rotate synchronously, and the cleaner fixedly arranged in the water throwing basket does not clean the long wiping strip. The invention provides a cleaning tool which is good in cleaning effect and saves labor.

The application discloses a petroleum resin hydrogenation catalyst and a preparation method thereof. The petroleum resin hydrogenation catalyst comprises a first phase and a second phase; the first phase comprises aluminum oxide and nickel oxide, the second phase comprises aluminum oxide, zinc oxide and nickel oxide, and the catalyst has a spherical core-shell structure. The preparation method of the petroleum resin hydrogenation catalyst comprises the following steps: firstly, preparing an aluminum oxide-nickel oxide composite material; then, uniformly dispersing the composite material with a surfactant and a hydrocarbon-containing compound to obtain material A; uniformly mixing aluminum sol, a zinc-containing compound, a nickel-containing compound, a curing agent and an emulsifier additive to obtain a mixed solution; finally, mixing the material A with the mixed solution, and further performing forming, aging, extraction, washing, drying and calcination to obtain the petroleum resin hydrogenation catalyst. The petroleum resin hydrogenation catalyst has the advantages of high sulfur resistance, high hydrogenation decolorization performance and high stability, and is especially suitable for C5 and C9 petroleum resin hydrogenation treatment processes.

The utility model relates to an engineering machinery spring rolling clamp which comprises a clamp body, the right end of the clamp body is fixedly connected with a fixing plate, an electric push rod is installed at the upper end of the fixing plate, the power output end of the electric push rod is fixedly connected with an upper clamping plate, and the right end of the clamp body is fixedly connected with a lower buffering plate located on the lower side of the upper clamping plate. The lower buffering plate comprises a lower clamping plate fixedly connected with the clamp body, the outer end of the lower clamping plate is sleeved with an outer protection frame, two symmetrical buffering wrapping layers are arranged between the outer protection frame and the lower clamping plate, a threaded hole is formed in the bottom end of the outer protection frame, a threaded rod is connected into the threaded hole in a threaded mode, and the upper end of the threaded rod makes contact with and abuts against the lower clamping plate. And the buffering wrapping layer comprises the first buffering layer and the second buffering layer, the first buffering layer is located on the outer side of the second buffering layer, when the round steel is bent, the lower clamping plate can be protected and cooled, the lower clamping plate is not prone to damage in the long-term use process, and the service life of the lower clamping plate is prolonged.

The application discloses a bacteriostatic and deodorizing zeolite cat litter and a preparation method thereof, and belongs to the technical field of zeolite cat litter preparation. The bacteriostatic and deodorizing zeolite cat litter is composed of the following components in parts by weight: 55-75 parts of modified zeolite, 3-6 parts of bacteriostatic gel, 2-5 parts of adhesive, and 1-3 parts of filler. The modified zeolite is prepared from sulfamic acid, N,N-dimethylformamide, lignocellulose and zeolite, and the bacteriostatic agent is prepared from four-arm polyethylene glycol, succinic anhydride, triethylamine, N-hydroxyl glutarimide, 1-(3-dimethylaminopropyl)-3-ethyl carbodiimide hydrochloride and polylysine. The zeolite cat litter prepared by the method has excellent water absorption, antibacterial property and deodorizing property.

The application relates to the technical field of roadbed engineering, in particular to a roadbed filler based on high-water-content gold flotation tailings and a preparation method thereof.A roadbed filler based on high-water-content gold flotation tailings is prepared from the following raw materials: gold flotation tailings, modified precipitation material, curing agent, activator, solid modifier and anti-cracking agent; the water content of the gold flotation tailings is lower than 20%; in the application, the porous precipitation material and the low-carbon cementing material are used to perform pre-dehydration treatment and efficient curing treatment on the high-water-content gold flotation tailings, so that the roadbed filler with low carbon and low cost and with high strength and low shrinkage is obtained.

The utility model relates to the technical field of glaze spraying, especially relates to a ceramic glaze spraying device, its technical scheme: including conveying frame and spraying frame, the spraying frame is fixed in the middle position of conveying frame upper end, the preheating box is fixed with in conveying frame upper end front side, the drying box is fixed with in conveying frame upper end back, install the heat preservation pipe between drying box and preheating box, install the conveyer belt in conveying frame, the conveyer belt passes through preheating box, spraying frame and drying box, fixed with annular frame in spraying frame, annular frame bottom rotatoryly connected with annular board, install the mounting seat in annular board bottom, install the mechanical arm in mounting seat bottom, fixed with the spray head in mechanical arm end part. The utility model carries out the preheating of ceramic body before ceramic spraying, can increase and improve the bibulousness of body, strengthens the adhesion of glaze, and utilizes the heat of the subsequent drying equipment purification to carry out the preheating treatment, can realize the purpose of energy -conserving to the maximum.

The invention discloses a water-swelling elastic plugging agent for a water-based drilling fluid and a preparation method of the water-swelling elastic plugging agent. The water-swelling elastic plugging agent comprises the following components in parts by weight: 100 parts of a polyolefin elastomer matrix material; 15 to 20 parts of a reinforced matrix material; 0.8 to 1.5 parts of a polyolefin elastomer matrix material cross-linking agent; 8 parts to 15 parts of a reinforcing agent A; 20 to 30 parts of a reinforcing agent B; 15 to 30 parts of super absorbent resin; 15 to 20 parts of a plasticizer; 0.2 to 0.8 part of an isolating agent; 0.5 to 1 part of an anti-aging agent; the plugging agent provided by the invention is simple in preparation process, not only is beneficial to industrial production, but also is convenient to prepare plugging slurry on site, can achieve a good plugging effect, and provides an effective technical means for well leakage treatment.

This invention relates to the field of oil drilling, specifically to a conjugated diene and a plugging gel based on the conjugated diene, and a method for preparing the same. The conjugated diene has a structure as shown in Formula I, and the plugging gel comprises a polymer obtained by monomer polymerization of the conjugated diene, alkenyl amide, and alkenyl sulfonic acid. The plugging gel based on this conjugated diene exhibits excellent resistance to dilution, temperature, salt, and calcium, making it suitable for plugging operations in high-temperature deep wells, especially in high-temperature lost circulation formations with highly mineralized water layers. Formula I

The invention belongs to the technical field of food fresh-keeping materials, and particularly relates to an aerogel type composite fresh-keeping pad as well as a preparation method and application thereof. The preparation method of the aerogel type composite fresh-keeping pad comprises the following steps: S1, mixing polyethylene glycol, oxalic acid and polyacrylic acid, and stirring at 70-80 DEG C to obtain a eutectic solvent; the method comprises the following steps: mixing a biomass raw material with a deep eutectic solvent, extracting, and filtering to obtain solid residues; s2, mixing the obtained solid residues with water, performing high-pressure homogenization treatment, mixing the obtained cellulose-containing suspension with a gelatin solution and a cross-linking agent, pouring the obtained mixed solution into a forming mold, performing freeze-drying treatment, and taking out to obtain the aerogel type composite fresh-keeping pad. The aerogel type composite fresh-keeping pad prepared by the method disclosed by the invention has good mechanical property, water absorption and antibacterial activity, and shows an excellent fresh-keeping effect in fresh-keeping of fish slices.

This invention discloses a urine collection and tubing fixation device specifically designed for pediatric urodynamic examinations, belonging to the field of medical devices. The device comprises a detachable catheter fixation section, a urine storage cover, and a fixing ring, connected from top to bottom via a first magnetic traction assembly. The catheter fixation section has a central tubing through-hole and an internal adjustable chuck clamping mechanism, with an elastic fixing band featuring a low-sensitivity adhesive on the outer wall. The urine storage cover has a split, multi-layered magnetic traction structure, with a removable inner absorbent layer and an outer waterproof fixing layer. The fixing ring features a Velcro elastic band with a soft buffer layer, forming double reinforcement from top to bottom. This invention provides stable fixation, reliable leak prevention, low sensitivity and comfort, convenient operation, and reusability of the main body. It effectively improves the accuracy and safety of pediatric urodynamic examinations, reduces clinical consumable costs, and is suitable for children of different ages and genders, as well as various examination scenarios.

This invention discloses a natural fiber absorbent and highly resilient cotton towel and its preparation method, relating to the field of medical consumables technology and belonging to patent classification number A61Q19 / 00. The method includes opening and mixing bamboo pulp fibers and flax fibers, cross-carding, and air-forming them into a web to obtain a base fabric; sequentially subjecting it to alkali impregnation and washing, ultrasonic treatment, and selective oxidation with TEMPO to obtain an activated oxidized base fabric; then immersing it in a chitosan quaternary ammonium salt solution for electrostatic loading treatment; subsequently immersing it in a crosslinking solution containing nanocellulose whiskers, epoxidized soybean oleic anhydride, and triethylamine for heated reflux crosslinking; finally immersing it in a synergistic bridging solution containing anhydrous citric acid and γ-aminopropyltriethoxysilane, followed by drying and high-temperature heat setting treatment to obtain the final product. This invention significantly improves the absorbency and resilience of the cotton towel, and the product is environmentally friendly and biodegradable.

The utility model discloses a high-density closed felt structure which comprises a flannelette surface layer, a flannelette core layer, a flannelette bottom layer, a first base cloth layer and a second base cloth layer, the first base cloth layer comprises first warp yarns, second warp yarns and first weft yarns; third weft yarns corresponding to the first warp yarns in the first base cloth layer and the second base cloth layer are arranged in the flannelette core layer; flannelette water absorption cavities are formed among the first weft yarns, the second weft yarns and the third weft yarns; the high-density base cloth layer is formed by the first warp yarns, the second weft yarns and the first weft yarns of the first base cloth layer and the second base cloth layer, so that more water can seal gaps of the coarse cotton cloth, the coarse cotton cloth is more closed and airtight, the vacuum degree of vacuum equipment is conveniently kept during vacuum dewatering, dewatering of the coarse cotton cloth is more sufficient, the dryness of the coarse cotton cloth is improved, and the service life of the coarse cotton cloth is prolonged. And flannelette water absorption cavities are formed among the first weft yarns, the second weft yarns and the third weft yarns, so that the water absorption capacity is effectively improved, and the dryness of the paper sheet is improved.

This utility model discloses an antibacterial bamboo fiber spunlace fabric, including a spunlace fabric body and a structural layer. The absorbent layer of this utility model is made of sponge material, which increases the thickness of the spunlace fabric and has better water absorption, allowing it to retain more moisture. The mesh fabric can make the spunlace fabric body and the absorbent layer more firmly connected and make the spunlace fabric body less prone to tearing, thus improving the strength of the spunlace fabric body. The surface layer is made of interwoven bamboo fiber and hemp fiber, giving the surface a rough surface. The first fiber pad is made of polyester fiber yarn, which has high durability. The second fiber pad is made of cotton fiber, which has good water absorption and can also have a better cleaning effect on stubborn stains. The second cleaning layer is tightly arranged, and the finished product feels close to textiles, making the surface of the second cleaning layer softer, giving the spunlace fabric body a soft cleaning surface.

The application relates to the technical field of biological medicine, and particularly discloses embolism developing particles loaded with coagulation accelerators and a preparation method thereof. The embolism developing particles loaded with coagulation accelerators contain ortho-carboxy benzoylated gelatin, a developing agent and a coagulation accelerator; wherein the preparation method of the ortho-carboxy benzoylated gelatin is as follows: gelatin is dissolved in water to prepare a gelatin aqueous solution with a concentration of 3-5 wt%, and the pH of the gelatin aqueous solution is adjusted to 8.5-9.5; then, under the action of stirring, o-phthalic anhydride is added into the gelatin aqueous solution, and the reaction is carried out at 40-50 DEG C for 1-2 h to obtain a reaction liquid; the ortho-carboxy benzoylated gelatin is obtained through purification and freeze-drying; and the application further provides the preparation method of the above-mentioned embolism developing particles loaded with coagulation accelerators. The ortho-carboxy benzoylated gelatin can be used to prepare embolism developing microspheres with high porosity and good water absorption, and the embolism developing particles with high coagulation accelerator loading capacity can be obtained by mixing the ortho-carboxy benzoylated gelatin with the coagulation accelerator.

The application provides a titanium dioxide type low-temperature hydrogenolysis catalyst and a preparation method and application thereof. The catalyst comprises a titanium dioxide carrier and an active component loaded on the titanium dioxide carrier, and the active component comprises scandium oxide and tungsten oxide. The preparation method of the catalyst comprises the following steps: dipping the titanium dioxide carrier in a mixed solution of scandium salt and tungsten salt for a period of time, so that the scandium salt and the tungsten salt are loaded on the titanium dioxide carrier; and then drying and calcining the titanium dioxide carrier loaded with the scandium salt and the tungsten salt, to obtain the titanium dioxide type low-temperature hydrogenolysis catalyst. The catalyst has good sulfur dioxide hydrogenation activity and organic sulfur hydrolysis activity, and can be applied to a process for treating sulfur recovery tail gas at a low temperature of 210-220 DEG C.

The invention relates to the field of concrete functional additives, in particular to a concrete internal curing agent with a hydration temperature rise regulation effect, a preparation method of the concrete internal curing agent and a concrete shrinkage-reducing and anti-cracking functional material. Wherein the raw materials comprise a polymeric monomer, a cross-linking monomer, an initiator, a polyhydroxy carbohydrate and water; wherein the polymeric monomer is composed of 70-100% by mass of an acrylamide monomer and the balance of an acrylic acid monomer, the polyhydroxy carbohydrate is a starch hydrolysate dextrin compound, and the DE value of the dextrin compound is greater than 0 but not greater than 15. The internal curing agent effectively solves the problem that an existing commercially available super absorbent polymer (SAP) internal curing material is poor in water absorption and water retention capacity on a cement pore solution containing divalent ions and trivalent ions, and the internal curing agent has the effects of internal curing and cement hydration heat release regulation and control.

The application discloses a nylon composite material, which comprises the following components in parts by weight: aliphatic nylon 60-80 parts; MCA flame retardant 15-35 parts; polyethylene glycol 5-10 parts; and polyether block amide 4-10 parts. The MCA with specific free cyanuric acid content is used in the application, and the MCA generates inert gas due to the high temperature generated by an electric arc in the IPT test, which is beneficial to the rapid outward diffusion of the electric arc. Meanwhile, the polyether block amide as a charge dissipating agent can reduce the electric arc energy and guide the rapid diffusion of the electric arc. Meanwhile, the introduction of the polyethylene glycol can improve the water absorption of the nylon composite material, and the electric arc diffusion is synergized, so that the IPT is further improved. Meanwhile, the nylon composite material has a flame retardancy of 0.8mm V-0.

This invention relates to a bio-based polyamide carbon fiber reinforced material, comprising the following components: 100 parts by weight of pentanediamine polyamide resin; 10-30 parts by weight of furanyl polyester resin; 1-5 parts by weight of chain extender; and 10-50 parts by weight of carbon fiber. The preparation method includes acid-alcohol treatment of the carbon fiber: impregnating the carbon fiber in a liquid of polybasic acid and polyol, heating and dehydrating it, then blending the acid-alcohol treated carbon fiber with pentanediamine polyamide resin, furanyl polyester resin, and chain extender, and curing to obtain the reinforced material. This invention improves the bond strength and water absorption of pentanediamine polyamide and carbon fiber, resulting in a reinforced material with strong mechanical properties, low water absorption, and a certain degree of biomass content.

This invention discloses a method for preparing maleic rosin-based hydrogels and their applications. The method includes: (1) synthesizing N-aminoethyl maleic rosin imide by reacting maleic rosin with ethylenediamine; (2) reacting N-aminoethyl maleic rosin imide with acryloyl chloride to synthesize N-(N′-acryloyl)aminoethyl maleic rosin imide; and (3) preparing the maleic rosin-based hydrogel by crosslinking and copolymerizing N-(N′-acryloyl)aminoethyl maleic rosin imide with dimethylaminopropylacrylamide. This method has simple reaction operation, mild reaction conditions, and low cost; the reaction has good specificity, and subsequent separation and purification are relatively simple; finally, the hydrogel product obtained by this method has good water absorption properties and can be used to remove toxic heavy metal cations from environmental water bodies, meeting the application needs of some special occasions, and possessing strong practical value and market prospects.

The invention provides a preparation method of hydro-thermal modified kidney bean starch after germination pretreatment, and belongs to the technical field of food processing. The preparation method comprises the following steps: soaking kidney bean seeds in a CaCl2 solution, fishing out kidney beans, and carrying out germination treatment on the kidney beans at a certain temperature; carrying out wall breaking treatment on the sprouted kidney beans, sieving, standing, and washing to remove impurities and pigments; adding a NaOH solution, adjusting the pH value, and soaking; centrifuging, pouring away an upper-layer solution, adding pure water, stirring, centrifuging and drying; adding pure water to change the moisture content, and putting into a drying oven for reaction to obtain the modified germinated kidney bean starch. The functionality of the starch is remarkably improved, the core requirements of the food industry for high-quality stabilizers and texture modifiers are accurately met, and an efficient solution is provided for developing food with better taste, longer shelf life and better health attributes. And the method particularly meets the technical requirements of quickly growing markets such as frozen prefabricated vegetables, plant-based products, flour-coated fried foods and high-temperature-resistant sauces.

This utility model relates to the field of textile fabrics, and more particularly to a green and environmentally friendly fabric, comprising a reinforcing surface layer and an environmentally friendly base layer. A heat-melting yarn is disposed between the reinforcing surface layer and the environmentally friendly base layer. The environmentally friendly base layer is made of regenerated cellulose fibers. The top and bottom ends of the heat-melting yarn are fixedly connected to the reinforcing surface layer and the environmentally friendly base layer, respectively. The heat-melting yarn is woven from heat-melting fibers. The reinforcing surface layer is woven from fiber bundles, which include tensile fibers, flame-retardant fibers, absorbent fibers, polyester fibers, and corrosion-resistant fibers. The tensile fibers, flame-retardant fibers, absorbent fibers, polyester fibers, and corrosion-resistant fibers are bundled together to form a tight structure. This invention solves the technical problems of insufficient environmental performance and functionality in traditional fabrics.

The utility model discloses a flame -retardant heat -insulation waterproof moisture -permeable fabric, including polytetrafluoroethylene moisture -permeable membrane, first flame -retardant fiber water -jet felt and second flame -retardant fiber water -jet felt, polytetrafluoroethylene moisture -permeable membrane with first flame -retardant fiber water -jet felt between, through first point shape flame -retardant adhesive and stick together, first flame -retardant fiber water -jet felt with second flame -retardant fiber water -jet felt between, through second point shape flame -retardant adhesive and stick together, wherein, second flame -retardant fiber water -jet felt has multiple pinholes of array, to increase the moisture -permeability of fabric. The utility model discloses a flame -retardant heat -insulation waterproof moisture -permeable fabric, polytetrafluoroethylene moisture -permeable membrane, first flame -retardant fiber water -jet felt and second flame -retardant fiber water -jet felt three layer materials and stick together, second flame -retardant fiber water -jet felt has multiple pinholes of array, and the whole fabric heat protection performance (TPP) is good, and the moisture -permeability is high, and has the function of moisture absorption and sweat -releasing.

This invention discloses a method for preparing an aramid nanofiber-reinforced perfluorosulfonic acid proton exchange membrane, comprising the following steps: S1, mixing aramid nanofibers, a membrane-forming solvent, potassium tert-butoxide, and methanol to obtain an aramid nanofiber dispersion; S2, mixing the aramid nanofiber dispersion and a perfluorosulfonic acid solution, stirring, and degassing to obtain a first mixed solution; S3, mixing the first mixed solution and a coagulant to obtain a second mixed solution, and coating the mixture to obtain a composite membrane; S4, allowing the composite membrane to stand, drying, and annealing to obtain an aramid nanofiber-reinforced perfluorosulfonic acid proton exchange membrane precursor; S5, post-processing the aramid nanofiber-reinforced perfluorosulfonic acid proton exchange membrane precursor to obtain the aramid nanofiber-reinforced perfluorosulfonic acid proton exchange membrane. The introduction of aramid nanofibers in this invention improves the mechanical stability, ion exchange capacity, water absorption swelling rate, and proton conductivity of the aramid nanofiber-reinforced perfluorosulfonic acid proton exchange membrane.

The application relates to the technical field of welding materials, in particular to a high-stability lead-free soldering paste without an inner cover and a preparation method thereof, the lead-free soldering paste contains the following components in parts by weight: 10-14 parts of a soldering paste, 86-90 parts of lead-free soldering powder; the lead-free soldering powder is selected from one or more of Sn99Ag0.3Cu0.7, Sn98.5Ag1Cu0.5 and Sn96.5Ag3Cu0.5; the soldering paste contains the following components in parts by weight: 30-50 parts of rosin, 4-10 parts of resin, 30-50 parts of a solvent, 3-15 parts of an additive, 4-8 parts of a thixotropic agent, 5-10 parts of an organic acid, 0.5-3 parts of a halogen compound and 0.5-2 parts of an antioxidant. In the application, the prepared low-water absorption additive is introduced into the lead-free soldering paste to obtain a high-stability, low-water absorption soldering paste, the soldering paste can be stored for a long time without covering the inner cover, the material for producing the inner cover is saved, the packaging process is simplified, the storage time is prolonged, small and micro enterprises can concentrate on furnace welding, the welding time is reduced, and the energy consumption is reduced.

This utility model relates to the field of disposable hygiene product production equipment, and particularly to an adult diaper compaction device that provides precise and uniform material conveying and mixing with good compaction effect. It includes a superabsorbent polymer (SAP) suction component, a SAP feeding component, a wood pulp fiber suction component, a feeding bin, a forming die wheel assembly, a first transfer wheel, a cotton core pressing component, a second transfer wheel, and an adsorption conveying component. The SAP feeding component is located at the output end of the SAP suction component. The feeding bin has a first inlet, a second inlet, and an outlet. The output ends of the SAP feeding component and the wood pulp fiber suction component are respectively connected to the first and second inlets of the feeding bin. The forming die wheel assembly is located at the outlet of the feeding bin. The first transfer wheel is located at the output end of the forming die wheel assembly. The cotton core pressing component and the second transfer wheel are located at the output end of the first transfer wheel.

The present application belongs to the technical field of wastewater sampling, in particular to a water body sampling device for industrial wastewater tracing, comprising a mounting part, a sampling mechanism, a detection mechanism, a wiping mechanism and a backflow mechanism; the mounting part comprises a buoyancy disc and a mounting box, the buoyancy disc is fixedly installed on the upper end face of the mounting box; the sampling mechanism comprises a control pump, a conveying pipe and a filter, the control pump is fixedly installed in the buoyancy disc, the filter is connected with the input end of the control pump, and the conveying pipe is connected with the output end of the control pump; the detection mechanism comprises a carrier and a sensing plate, the sensing plate is obliquely installed on the outer wall of the carrier, and the carrier is fixedly installed on the inner wall of the buoyancy disc; the wiping mechanism comprises a sliding block and a wiping layer, the sliding block is slidingly arranged on the outer wall of the carrier, and the wiping layer is elastically arranged on the bottom of the sliding block; the backflow mechanism comprises a storage cylinder and a backflow pipe; through the cooperation of the above structure, the accuracy and reliability of the industrial wastewater tracing data are improved, and the online continuous sampling and detection mode truly meets the high-precision requirement.