46results about How to "Strong pollution" patented technology

The invention discloses a method of producing the hyperfiltration membrane of amphiphilic copolymer modified polyvinylidene fluoride, comprising the following steps: 1) mixing polyvinylidene fluoride, poly (methyl methacrylate - monomethyl ether polyoxyethylene methyl methacrylate), additives, non-solvent and solvent to form the casting film solution; 2) making the casting film solution into the polyvinylidene fluoride membrane by using the film forming machine and then soaking in the coagulation bath; 3) conducting the posttreatment of hydrophilicity; 4)obtaining the hydrophilic polyvinylidene fluoride ultrafiltration membrane after cleaning and drying. The method is characterized in that the brush shape, chain ball shape or dumbbell shape amphiphilic copolymer are mixed with the polyvinylidene fluoride to produce the polyvinylidene fluoride hyperfiltration membrane with hydrophilicity, anti-pollution, large flux and high retention rate by adopting the solution phase conversion method. The method has the advantages that the obtained membrane is provided with dozens to hundreds nanometer of particular densified hydrogel surface layers, the contact angle of the membrane surface can be reduced below 60 degrees and can be lowered to 0 degree within tens of seconds, the water flux can reach 1000L / m<2> / h (0.1Mpa) or above, the retention rate of BSA can reach 90% or more and the recovery rate of water cleaning flux can reach 90% or higher.

The invention relates to the technical field of preparation of aqueous adhesive and discloses a preparation method of acrylic ester oligomer chemical modified aqueous polyurethane pressure-sensitive adhesive. The preparation method comprises the following steps of: making hydroxyl monomers, a hydrophilic chain extender and polyisocyanate which are mainly used as man raw materials react to generate a prepolymer; adding an acrylic ester oligomer and making the acrylic ester oligomer and polyurethane prepolymer properly grafted; carrying out multiple modification through a cross-linking agent; and finally, carrying out water emulsification to obtain the acrylic ester oligomer modified aqueous polyurethane pressure-sensitive adhesive. In the invention, the acrylic ester oligomer is introducedinto the polyurethane system, and good characteristics of aqueous polyurethane and polyacrylic ester are integrated. Compared with solvent-based pressure-sensitive adhesive, water is used as a solvent in the invention, the usage amount of organic solvents is small so that the requirement of clean production processes are met, and the low temperature resistance is greatly improved. The synthesizedacrylic ester oligomer chemical modified aqueous polyurethane pressure-sensitive adhesive has more excellent mechanical property, strong bonding capacity, good film forming property and stable emulsion.

The invention relates to a garbage percolate treatment technology belonging to the technical field of the treatment of high-concentration organic wastewater. The treatment technology comprises six steps of pretreating, anaerobically treating, treating by a tubular membrane bioreactor, performing nano-filtration / reverse osmosis deep treatment, treating concentrated liquor, treating sludge and thelike. The technology can be used for degrading COD (chemical oxygen demand), total nitrogen and total phosphorus in the high-concentration wastewater, removing heavy metal ions from the high-concentration wastewater, and the like. After the technology is used, the defect in the prior art is overcome, wherein the defect mainly refers to the problems of unstable system or high maintenance cost and the like, and a core unit of the technology is a gas-reinforced ceramic membrane bioreactor. High-concentration garbage percolate treated by the technology is better than the emission requirement of the household garbage landfill and pollution control standard (GB16889-2008), and the quality of purified water meets the recycle requirement, so that the near-zero emission of the garbage percolate can be realized.

The invention discloses a pollution-resistant polyamide composite membrane which comprises a nonwoven fabric layer, a porous support layer, a polyamide layer and a pollution-resistant layer which are stacked sequentially, wherein the pollution-resistant layer comprises a polymer compounding inorganic nano particles; the inorganic nano particles are modified or unmodified inorganic nano particles, and preferably are at least one kind of the nano particles of silver, silver compound, modified silver, modified silver compound, copper, copper compound, modified copper, modified copper compound, zinc, zinc compound, modified zinc, modified zinc compound, titanium, titanium compound, modified titanium and modified titanium compound. The invention also provides a preparation method of the pollution-resistant polyamide composite membrane and an application of the pollution-resistant polyamide composite membrane in the field of liquid separation.

A rare-earth contained super-stable Y zeolite is prepared from the super-stable Y zeolite containing sodium oxide (3-5 wt.%), rare-earth compound and water in wt ratio of 1:(0.001-0.5):(1-10) through preparing solution of rare-earth compound, mixing and the said Y zeolite, and grinding with shearing stress of at least 10 kg / cm2 for at least 1 min. Its advantages are higher hydrothermal stability, high stability of activity, and high resistance to sodium and heavy metal pollutions.

The invention discloses a method for building an ecological littoral zone in a buffer area. The method comprises building of gabions, a low pond, multiple ponds and a retention canal. The method comprises the following specific steps: (1) a gabion area is built, wherein the gabions are built between a normal water level of a river and a level of a flood occurring every two years, and emergent aquatic plants are planted in gaps between the gabions; (2) the low pond is built, wherein a low area which is 20cm lower than the gabion area and 20cm lower than foundations of the multiple ponds is built between the level of the flood occurring every two years and the level of a flood occurring every twenty years; (3) a multi-pond system is built, wherein two rows of pond systems are built in the low pond area, substrate improvement is conducted, submerged plants are closely planted in the ponds, and the emergent aquatic plants are planted on the foundations and the circumferences of the ponds; (4) the retention canal is built, wherein the retention canal is built along the outside of the level of the flood occurring every twenty years. The method effectively solves the ecological problems that a surface source of a gentle slope area of the river is severely polluted, landscapes are poor, the biodiversity is reduced and water and soil loss occurs, and offers a feasible and efficient ecological restoration measure for recovery and reconstruction of a hydro-fluctuation belt.

The invention provides a high-pollution-resistant high-silicon coating special for bridges and overhead roads. The coating comprises the following components in percentage by weight: 50-65 percent of silicon-acrylic emulsion, 20-30 percent of rutile type titanium dioxide, 0.5-1.0 percent of dispersing agent, 0.1-0.5 percent of wetting agent, 0.1-0.3 percent of disinfectant, 0.1-0.3 percent of mildew-proof agent, 0.2-0.5 percent of antifoaming agent, 0.1-0.3 percent of pH value regulator, 5-10 percent of film forming aid, 0.3-1.0 percent of thickener and the balance of water. The synergic actions of the components in the high-pollution-resistant high-silicon coating special for bridges and overhead roads are brought into fully play. The coating has the advantages of high film forming property, high glossiness, high adhesion, high water resistance and alkali resistance, extremely high pollution resistance and weather resistance and environmental protection function.

The invention belongs to a water treatment technique, and relates to a water softener for a low-pressure boiler and a heat exchange system and a use method thereof. The softener is an aqueous solution consisting of phytic acid, caustic alkali, carbonate, a deoxidant, a flocculant and an accelerator and comprises the following components in mass fraction: 300-500 of phytic acid, 220-550 of caustic alkali, 0-300 of carbonate, 0-30 of accelerator, 0-50 of flocculant, 0-200 of deoxidant and 300-500 of water. The preparation method of the softener comprises the following steps: firstly dissolving the phytic acid in the water; then slowly adding the caustic alkali, the carbonate, the accelerator, the deoxidant and the flocculant while stirring; and stirring evenly and cooling to room temperature, so as to obtain the water softener. The adding amount of the softener is 30-100g / m<3> water, and the pH of the water is controlled at 8.0-10.0. The water softener has descaling, antiscaling and corrosion-inhibiting functions and wide adaptability; and used raw materials have no secondary pollution on environment.

The invention relates to a bottom bonding material used in preservative treatment of a chimney and a flue. The bottom bonding material is modified silicon rubber (M50), and surface modified polytetrafluoroethylene (DS1) of a surface preservative material is bonded to the inner walls of the chimney and the flue; the modified silicon rubber (M50) is formed by modifying room-temperature vulcanized silicon rubber through nano SiOx and TiO2 additives, and the weight ratio of the room-temperature vulcanized silicon rubber to the nano SiOx to the TiO2 is 100:2-6:1-3; and x in the nano SiOx is 1.2 to 1.6. The bottom bonding material can provide effective bonding for DS1 (surface modified polytetrafluoroethylene board) with temperature resistance and strong corrosion resistance in the preservative treatment of the chimney and the flue so that an integral preservative layer has good temperature resistance, strong adhesive force, super-strong acid resistance, good thermal shock resistance, good weather resistance, strong permeability resistance, strong pollution resistance and good scouring resistance.

The invention discloses a composite ultrafiltration membrane and a preparation method thereof. The composite ultrafiltration membrane comprises the following raw materials in portion by weight: 6 to 9 portions of polyether sulfone and 1.4 to 2.2 portions of cellulose powder. The composite ultrafiltration membrane material has good hydrophilicity and overcomes the defects of poor hydrophilicity and weak pollution resistance of a polyether sulfone ultrafiltration membrane material, because cellulose molecular chains are provided with a plurality of hydroxyl groups. The composite membrane material has strong pollution resistance, high water flux, good retention characteristic and high strength, prolongs the service life of the ultrafiltration membrane, and saves the production cost.

The invention discloses a special compound feed for a largemouth bass. The special compound feed comprises the following components in parts by weight: 6-10 parts of wheat, 9-12 parts of flour, 18-22 parts of soybean meal, 3-8 parts of corn gluten meal flour, 28-32 parts of fish meal, 10-14 parts of meat and bone meal, 3-7 parts of hydrolyzed fish protein, 4-6 parts of fish oil, 1-2 parts of soybean soil, 0.9 part of a complex vitamin, 0.5 part of compound mineral salt, 0.5-0.8 part of choline chloride, 1-1.2 parts of monocalcium phosphate, 0.15-0.2 part of vitamin C, 0.015-0.02 part of vitamin E, 0.1-0.2 part of methionine, 0.1-0.2 part of lysine, 0.1-0.15 part of inositol, 0.1-0.3 part of edible salt, 0.05-0.1 part of an antioxidant and 0.06-0.1 part of a mildew preventive agent. The special feed disclosed by the invention has the advantages of overcoming the defect of slow later-period growth of the largemouth basses and effectively reducing mutual killing of the black basses.

The invention belongs to the field of drive axle assemblies of forklifts, and particularly relates to a drive axle of an electronic forklift. The drive axle of the electronic forklift comprises an axle housing assembly, a primary speed reducer arranged in the axle housing assembly, a secondary speed reducer arranged in the axle housing assembly, a hub and a brake, wherein the axle housing assembly comprises an axle housing and an axle cover; one end of the axle housing is opened and connected with the axle cover; a hub mounting hole position is arranged at the other end of the axle housing and used for mounting the hub; the primary speed reducer is driven by a cylindrical helical gear pair; the secondary speed reducer is driven by a cylindrical gear planetary system; and the brake is arranged on the outer side of the axle cover and is used for braking an axle shaft. The electronic forklift wheel edge drive axle power transmission direction is axially parallel to the hub (namely the wheel), the structure design is reasonable and compact, and the transmission efficiency is high.

The invention provides a method for purifying cannabidiol from waste reagents, belongs to the technical field of functional substance recycling, and aims to achieve recycling of the cannabidiol in thewaste reagents. The method includes the steps: 1) extracting extracted waste liquid generated in cannabidiol CBD preparation process by organic solvents, and filtering extraction liquid by a micro-filtration membrane; 2) mixing the filter liquid and ethanol solution with volume fraction of 88.00-99.95%, filtering mixed liquid by an ultra-filtration membrane to obtain trapped fluid containing tetrahydrocannabinol and filter liquid containing cannabidiol, and concentrating the trapped fluid to obtain tetrahydrocannabinol extraction cream; 3) mixing the filter liquid containing cannabidiol and ethanol solution with the volume fraction of 65.00-85.00%, filtering mixture by a nano-filtration membrane to obtain trapped fluid containing cannabidiol, and concentrating the trapped fluid to obtaincannabidiol extraction cream. The method can be used for recycling cannabidiol extraction waste liquid.

The invention discloses a domestic sewage integrated anaerobic ammonia oxidation-strengthened endogenous denitrification SBBR control system, and belongs to the field of biological sewage treatment. The system comprises a water tank and an SBBR reactor; after domestic sewage enters the SBBR reactor, denitrifying bacteria achieve a denitrifying effect by utilizing organic matters in the sewage, and redundant organic matters are stored in vivo to synthesize an internal carbon source; micro-aeration is started after the reaction is ended; integrated anaerobic ammonia oxidation reaction is performed on a biological membrane; a DO sensor, a NH4<+> sensor, a NO2 sensor and a NO3 sensor acquire signals online, the DO concentration is controlled and the reaction time is adjusted via computer output; after the aeration is completed, anoxic endogenous denitrification is performed, the concentration of nitrate nitrogen of outlet water is reduced, and static settling is performed and water is discharged after the reaction is completed. According to the domestic sewage integrated anaerobic ammonia oxidation-strengthened endogenous denitrification SBBR control system, the technical advantages of the SBBR system and integrated anaerobic ammonia oxidation are played; the organic matters in the sewage are utilized, so that the SBBR control system has the characteristics of energy conservation, consumption reduction and impact load resistance; meanwhile, the system operation is optimized via online real-time control; the automation degree is high; the controllability is high; advanced nitrogen removal can be realized.

The invention relates to a driving and parking dual-purpose wet-type multi-piece brake. The driving and parking dual-purpose wet-type multi-piece brake comprises a brake cylinder body, wherein a plug screw is arranged on the brake cylinder body, a driving braking mechanism and a parking braking mechanism are arranged on a whole, and the driving braking mechanism and the parking braking mechanism share a set of friction pair. The driving braking mechanism comprises a piston which is matched with the braking cylinder body, wherein a driving braking oil duct is arranged in the braking cylinder body, one end of the driving braking oil duct corresponds to the left side of the piston, the right side of the piston is attached to the left side of a pressing plate, the other end of the driving braking oil duct is communicated with an oil opening formed in a main speed reducer shell body, the oil opening is adjacent to a vent valve arranged on the main speed reducer shell body, and the oil opening is connected with a hydraulic pump. According to the driving and parking dual-purpose wet-type multi-piece brake, a braking system of an automobile can be simplified, the weight of the whole automobile is reduced, fuel consumption can be lowered, the mobility of the automobile can be improved, interchange between the driving and parking dual-purpose wet-type multi-piece brake and a shoe brake can be achieved in terms of the structure and the installation, and other parts of an axle can not be changed.

The invention discloses a small-flow high-pressure compact type balance valve which comprises a balance valve body. A balance main valve, a buffer valve and a leading oil-way control system are integrated inside the balance valve body, a first main oil opening, a second main oil opening, an oil returning box opening and a control oil opening are formed in the balance valve body in a matched mode, two oil openings of the balance main valve are communicated with the first main oil opening and the second main oil opening respectively, two oil openings of the buffer valve are communicated with the second main oil opening and the oil returning box opening respectively, and the control input end of the leading oil-way control system is communicated with the control oil opening. A filter and a first damping are installed on the control input end in a series mode, the control output end of the leading oil-way control system is communicated with a control cavity of the balance main valve, and the control output end is formed by a tail port of a leading valve set composed of an adjustable throttling device, a forward direction one-way valve and a reverse direction adjustable one-way valve. A front port of the leading valve set is in tandem connection to an outlet of the first damping, the front port of the leading valve set is connected with a second damping, and the oil returning end of the second damping is communicated with the oil returning box opening.

The invention discloses a multifunctional ceramsite using pickling sludge as a fluxing agent and a production method thereof. The pickling sludge, fly ash and bentonite are used as main raw materials; the three raw materials are mixed in proportion and granulated, dried, calcinated and cooled to obtain the multifunctional ceramsite. The production method provided by the invention utilizes local solid wastes to obtain the multifunctional ceramsite, not only solves a problem of treatment of the local solid wastes, obtains the multifunctional ceramsite which has high physical strength, good chemical stability, small bulk density and large specific surface area and can be used in construction, water treatment, landscape arts and other fields, but also reduces production costs of the ceramsite, and has a good market prospect.

The invention relates to a nonmagnetic single-component powdered ink, comprising the following components in weight percent: resin, 60-90wt %; colorant, 1-35wt%; paraffin, 2-10wt%; charged agent, 0.1-4wt%; alkaline earth metal oxide, 0.1-10wt%; and additive, 0.1-5wt%; and its preparing process: weighing resin, magnetic powder, colorant, paraffin, charged agent, and alkaline earth metal oxide in proportion, putting into a mixer and fully mixing, rolling into sheets by a mixing roll, crushing and classifying and obtaining classified products, adding in the additive, fully mixing by mixer and screening to make it. And it has advantages of stabilizing image quality, strengthening blackening, improving blackening uniformity and persistence, reducing bottom ash and distinct gradation, can meet requirements of clients in the aspects of image resolution, fixation, fluidity, storage, transport, etc, and has strong universality and low cost, easy to control and have less pollution, belonging to environmental protection dissipative material.

The invention relates to high temperature resistant micro-foam drilling fluid, and belongs to the technical field of petroleum drilling fluids. The drilling fluid comprises, by weight, 10-15 parts of modified attapulgite, 4-6 parts of sodium alpha-olefin sulfonate, 0.5-2 parts of nanometer titanium dioxide, 1-3 parts of tea saponin, 0.2-0.5 parts of nanometer molybdenum disulfide, 0.4-0.7 parts of nanometer zirconium dioxide, 3-5 parts of a fluid loss agent, 1-2 parts of a shale inhibitor and 100-130 parts of water. The high temperature resistant micro-foam drilling fluid has the advantages of good temperature and pollution resistance, strong mud shale inhibition ability, significant reduction of the shale hydration ability, maintenance of the stability of shale formation in the drilling process, reduction of the occurrence of underground complicated conditions, adaptation to and balance with the stratum pressure, good rheological property, meeting of rock debris carrying requirements, and suitableness for low pressure reservoir drilling.

The invention provides a novel metal product. The novel metal product comprises a base layer, zinc layers, paint layers and transparent protective coatings, wherein the zinc layer is arranged on each of two sides of the base layer, the paint layer is arranged on each of two sides of each zinc layer, and transparent protective coatings are arranged on two sides of each paint layer. The novel metal product disclosed by the invention has a simple structure and simple design, the surface mechanical hardness of the metal product is enhanced, and the abrasion of patterns on the metal product can be reduced, the service life of the metal product is prolonged and the glossiness of the surface is reduced due to the transparent coatings.

The invention discloses a method and breeding sewage treatment system for treating breeding sewage through pulverized fuel ash. The breeding sewage treatment system for treating the breeding sewage through the pulverized fuel ash comprises a feces collection pond, a solid-liquid separation device, a slurrying tank, an adsorption treatment device, a sterilization device and a sludge collection pond. The adsorption treatment device comprises a first treatment tank, a second treatment tank, a third treatment tank, a fourth treatment tank and a fifth treatment tank which are connected in sequence.The breeding sewage enters the adsorption treatment device to be subjected to adsorption treatment with pulverized fuel ash slurry, pores inside the pulverized fuel ash are rich, the specific area islarge, the capability of adsorbing and flocculating pollutants is high, decoloration and deodorization can be effectively achieved, and organic matter, heavy metal ions, bacteria and other microorganisms, suspending colloid impurities and the like in water are removed; water is purified, secondary utilization of solid waste is achieved, the sewage treatment cost is lowered, after the breeding sewage is subjected to five stages of adsorption treatment, the COD value and chromaticity in the sewage can be effectively lowered, the effluent can be recycled, and the use quantity of water resourcesis reduced.

The invention relates to the technical field of functional polymer ultrafiltration membrane materials, in particular to a preparation method of a nanoparticle-containing modified cellulose ultrafiltration membrane, which comprises the following steps: S1, activating microcrystalline cellulose in glacial acetic acid, and adding acetic anhydride and concentrated sulfuric acid to prepare cellulose acetate, S2, adding nano cellulose into N, N-dimethylformamide and acetone, fully dispersing, then adding cellulose acetate, hyaluronic acid functionalized silicon dioxide nanoparticles and polyethyleneglycol, fully mixing and dissolving to be uniform, defoaming and filtering to obtain a membrane casting solution, and S3, casting the membrane casting solution onto a clean glass plate, scraping intoa membrane by using a membrane scraping knife, evaporating the solvent, immersing the glass into a gel bath, removing, taking the membrane, soaking into a glycerol aqueous solution, washing, and drying to obtain the product. The preparation method is simple, the mechanical strength of the ultrafiltration membrane is higher, the anti-pollution capability is stronger, the bacteriostatic and antibacterial effects are better, and the cellulose ultrafiltration membrane has excellent oxide tolerance, so that the service life of the cellulose ultrafiltration membrane is prolonged.

The invention relates to a cleaning method for keyboard keys and a cleaning kit used therein. The cleaning method comprises the following steps: step 1, a soaking and cleaning stage; and step 2, a quick-drying and brightening stage. In the soaking and cleaning stage, the dismounted keyboard keys are soaked in a cleaning solution for 10 min and stirred for 1-3 minutes, wherein the cleaning solution is prepared by mixing 10-20 parts by weight of ethanol with 10 parts by weight of a mixed surfactant composed of an anionic surfactant sodium dioctyl sulfosuccinate and an amphoteric surfactant dodecylethoxy sulfobetaine in a weight ratio of (3-6): (1-4) and then slowly adding 150-250 parts by weight of purified water after mixing. In the quick-drying and brightening stage, the soaked and cleaned keyboard keys are added into a brightening solution, stirred for 20 s and then dried in the air, wherein the brightening solution is prepared by adding 5 parts by weight of a water-soluble brightener into 20 parts by weight of purified water, uniformly dispersing the brightener and then further adding 75 parts by weight of ethanol. Experimental results show that the cleaning method provided by the invention can achieve the effects of deep and rapid cleaning and brightening and lubricity improvement.

The invention discloses an anolyte flow homogeneous catalysis fuel cell and a preparation method thereof. The fuel cell comprises a bipolar plate structure, and the bipolar plate structure comprises an anode plate, a cathode plate, and a membrane electrode located between the anode plate and the cathode plate. The membrane electrode comprises an anode, a proton exchange membrane, a catalyst layerand a cathode, which are sequentially arranged in a stacked mode in the direction from the anode plate to the cathode plate. The anode is made of hydrophilic materials, and the cathode is made of hydrophobic carbon paper. The fuel cell is provided with a fuel reaction chamber for containing anolyte at one side of the anode plate with the double-folded-plate structure, and the anolyte comprises fuel, acid and a catalyst, wherein the fuel is a biomass material. A homogeneous catalysis mode is adopted, so the anti-pollution and anti-poisoning capacity is high, the use amount of a membrane electrode noble metal catalyst is small, and the cost is saved.

The invention relates to the technical field of ecological restoration of cadmium polluted soil, and concretely relates to a method for restoring cadmium polluted soil by Thalia dealbata. Researches find that Thalia dealbata can normally grow in high concentration cadmium environment, the biomass of the Thalia dealbata does not obviously decrease, the heavy metal content of the aboveground part of the Thalia dealbata is higher than the heavy metal content of the root part of the Thalia dealbata, and Thalia dealbata can adsorb cadmium in soil. Thalia dealbata is planted in the heavy metal cadmium polluted soil, so when Thalia dealbata plants are mature, the aboveground parts of the plants (a certain height of the basal parts of the plants are reserved) are cut, harvested and removed from the polluted soil; and after the base parts or the underground parts of the plants have new buds and the new buds gradually grow to form new mature plants, the above processes are repeated in order to reduce the pollutant cadmium in soil.

The invention relates to a river ecologic purifying system, and a making method of ecologic concrete products. The system comprises a plurality of ecologic concrete products laid at the river bottom and on the bank, the upper surfaces of the ecologic concrete products are provided with upper flow guiding holes, the lower surfaces of the ecologic concrete products are provided with lower flow guiding holes, the apertures of the lower flow guiding holes are smaller than the apertures of the upper flow guiding holes, flow guiding pipelines for connecting the upper flow guiding holes with the lower flow guiding holes are arranged in the ecologic concrete products, and the surfaces of the flow guiding pipelines are provided with microbes or water plants. The making method of the ecologic concrete products comprises the following steps: adding 50% of gravel while stirring, adding 10% of sludge with the water content being smaller than 80% while stirring 5min later, adding 20% of common nitrate cement while stirring 5min later, adding 1% of water while stirring 5min later, adding 15% of fine sand while stirring 5min later, adding 2% of water while stirring 5min later, adding 2% of a water reducer while stirring 5min later, using a molding die after uniformity to prepare concrete, and curing the concrete under dry and ventilating conditions for 30d or heating for drying and solidifying to obtain the ecologic concrete products. The system can effectively and ecologically reconstruct the river bottom and improves the river water purifying effect.

The invention relates to a magnetic single-component powdered ink, comprising the following components in weight percent: resin, 30-70 wt%; magnetic powder, 25-60wt%; colorant, 0-10wt%; paraffin, 2-10 wt%; charged agent, 0.1-4wt%; alkaline earth metal oxide, 0.1-10wt%; and additive 0.1-5wt%; and its preparing process: weighing resin, magnetic powder, paraffin, charged agent and alkaline earth metal oxide in proportion, putting in a mixer and fully mixing, rolling into sheets by a mixing roll, crushing and classifying and obtaining the classified products, adding in the additive, and finally mixing by mixer and screening to make it. And it has advantages of stabilizing image quality, strengthening blackening, improving blackening uniformity and persistence, reducing bottom ash and distinct gradation, as well as strong universality, low cost, easy to control and less pollution.

The invention discloses an electronic tag on a commodity packaging film and a preparation method thereof, a first conductive layer is printed on a first plastic film, and the first conductive layer comprises a first circular layer, a first coil layer, a first connecting section, a first contact and a first antenna which are connected in sequence; a first electrolytic dielectric layer is printed onthe first substrate, and the first contact is exposed out of the first electrolyte layer to form a first laminated structure; a second conductive layer is printed on the second plastic film, whereinthe second conductive layer comprises a second circular layer, a second coil layer, a second connecting section, a second contact and a second antenna which are connected in sequence; a second electrolytic dielectric layer is printed on the first laminated structure, and a second contact is exposed out of the second electrolyte layer to form a second laminated structure; and a first LC oscillationcircuit is formed from the first laminated structure and the second laminated structure by adopting a film pressing process. The first circular layer corresponds to the second circular layer, the first coil layer corresponds to the second coil layer, the first contact and the second contact are attached and conducted, and the electronic tag is easy to identify and read.

The invention discloses a fireproof flame-retardant aluminum-plastic composite plate and a preparation method thereof, the fireproof flame-retardant aluminum-plastic composite plate comprises an outerside aluminum plate, an inner side aluminum plate, an antioxidant plate and a flame-retardant core material, and an adsorption plate is fixed between the outer side aluminum plate and the inner sidealuminum plate; and the flame-retardant core material comprises polyethylene, polypropylene, a flame retardant, a flame-retardant synergist antimony trioxide and a molybdenum smoke suppressor. According to the preparation method of the fireproof flame-retardant aluminum-plastic composite plate, reaction equipment and machinery required by processing are used for manufacturing the plate and processing the manufactured plate. According to the fireproof flame-retardant aluminum-plastic composite plate and the preparation method thereof, the adsorption plate is additionally arranged so that the adsorption plate can effectively absorb formaldehyde, benzene and other pollutants brought by engineering construction through the through holes in the aluminum plate; and secondly, the fireproof flame-retardant aluminum-plastic composite plate is additionally provided with the antioxidant plate, so that the aluminum-plastic composite plate is not easy to oxidize quickly, and the service life of theproduct is prolonged.

The invention discloses silver paste for the back face of a lead-free crystal silicon solar cell. The paste is characterized by being prepared from the following components in percentage by weight: 55-84 percent of silver powder, 15-38 percent of modified organic bonding agent and 1-10 percent of inorganic bonding agent. The invention further discloses a preparation method of the silver paste forthe back face of the lead-free crystal silicon solar cell. The silver paste has the advantages of excluding of toxic substances such as lead and the like, small damage to human bodies and realizationof high adhesion between a silver electrode and a silicon substrate.