77results about How to "Improve the powder rate" patented technology

The invention discloses a method for electrostatic spraying of a powder coating on the surface of an aluminum profile. The method comprises the following steps that 1, the powder coating is prepared; 2, the surface of the aluminum profile is subjected to cleaning treatment; 3, passivating treatment is conducted; 4, drying is conducted; 5, electrostatic spraying is conducted; and 6, baking and curing are conducted. The method for electrostatic spraying of the powder coating on the surface of the aluminum profile is easy and convenient to operate and likely to be achieved, on the basis of the selected powder coating, through reasonable modes of surface passivating treatment, electrostatic spraying treatment and stepped baking and curing, not only is the powdering rate of electrostatic spraying effectively increased, but also the apparent quality of an obtained powder coating layer is good, and the hardness and the abrasion resistance are excellent; and meanwhile, the powder coating layer plays a good decorative effect and a protective effect on the aluminum profile, and the comprehensive performance is excellent.

The invention discloses boiling-endurable sand-ripple powder paint for coating corners of an aluminum section. The paint comprises polyester resin, a curing agent, filler, conventional auxiliary, a sand ripple agent, pigment and gas-phase oxide. The invention also discloses a preparation method of the powder paint. The powder paint has an excellent coating performance on corners of an aluminum section, and has a high coating rate on corners of the aluminum section.

The invention discloses an improved wheel powder spraying line and technology. A conveying line (2) is arranged on the outer side of a powder spraying chamber (1); a robot (3) and a turntable (4) are arranged between the powder spraying chamber (1) and the conveying line (2); the robot (1) grabs a wheel, and the turntable (4) sends the wheel into the powder spraying chamber (1) and rolls the wheel subjected to powder spraying out of the powder spraying chamber (1). The technology comprises technological processes as follows: storing workpiece parameters, recognizing workpieces, entering a powder spraying isolation chamber, moving the workpieces out of the conveying line, transferring the workpieces into the powder spraying chamber, spraying powder on the workpieces, recovering fallen powder into powder supply equipment for recycling, finishing powder spraying, moving out the workpieces, transferring the workpieces to workpiece cleaning stations, cleaning powder in workpiece assembly positions, cleaning powder on the turntable, transferring the workpieces back to the conveying line, and curing the powder.

The invention relates to a method for preparing a multifunctional power coating additive with a core-shell structure. The method comprises the steps of: A. uniformly mixing butyl methacrylate (BMA), methyl methacrylate (MMA) and lauryl mercaptan as a core monomer; B. uniformly mixing butyl methacrylate (BMA), methyl methacrylate (MMA), glycidyl methacrylate (GMA) and lauryl mercaptan as a shell monomer; C. adding water, lauryl sodium sulfate and sodium bicarbonate in a reactor, uniformly stirring to raise temperature, dripping the core monomer and ammonium persulfate, and maintaining the temperature; dripping the shell monomer and ammonium persulfate, and maintaining the temperature; cooling and filtering to obtain white acrylic ester core-shell polymer latex, wherein the solid content in the latex is 40-50%, and the conversion rate of the monomer is higher than 90%; and D. adding a calcium chloride aqueous solution, separating, washing with water, and drying to obtain a white powdery solid product. The additive is used for power coatings without being molten and granulated, can be added directly for use, and has the environmentally friendly characteristic.

The invention discloses a powder coating sprayed through a friction gun. The powder coating comprises the following substances in parts by weight: 30-60 parts of polyester resin, 4.5-30 parts of curing agent, 0.8-1.2 parts of flatting agent, 18-25 parts of pigment, 0-17 parts of inorganic filler, 0-5 parts of adjuvant and 0.1-0.4 part of friction agent. Due to the introduction of the friction agent, a great difference between dielectric constants of the powder coating and a material (polymer PTFE material) for preparing the pipe wall and a friction rod of the friction gun is generated in the frictional spraying process, so that the powder coating can be perfectly adsorbed on a workpiece after being electrified by virtue of friction with the material in the friction gun under the drive of dry airflow; in addition, the frictional electrification way is adopted, so that the Faraday effect generated by a corona field is avoided, and all corners of the workpiece can be completely coated by the powder coating. Meanwhile, compared with an electrostatic spraying way, the powder coating has the advantages that the powdering rate of the workpiece is higher, and a cured coating film is more excellent in flatting effect.

The invention relates to the field of powder coatings and discloses a dust-proof and anti-fouling powder coating, a preparation method and an application thereof and a dust-proof and anti-fouling product. In terms of 1,000 parts by weight of the powder coating, the powder coating is prepared from 400-750 parts by weight of matrix resin, 200-500 parts by weight of filler, 10-80 parts by weight of a general additive, 20-100 parts by weight of a conductive polymer, 10-100 parts by weight of an anti-static auxiliary and 0-50 parts by weight of a pigment. The dust-proof and anti-fouling powder coating has excellent dust-proof, anti-static and anti-fouling performance and is easy to clean.

The invention discloses a nanometer super wear-resistant powder coating, which comprises the following raw materials: polyester resin, low-density nanometer wear-resistant powder, titanium dioxide, curing agent, barium sulfate, leveling agent, brightener and charging agent, according to Calculated by mass percentage, polyester resin accounts for 55%-60%, low-density nano wear-resistant powder accounts for 15%-20%, titanium dioxide accounts for 8%-12%, curing agent accounts for 2%-5%, and barium sulfate accounts for 4%. -6%, leveling agent accounts for 2%-4%, brightener accounts for 1%-3%, and booster accounts for 1%-2%. The low-density nano-nano powder is made of nano-silicon carbide and nano-silicon nitride mixture. Through the above method, the present invention has excellent wear resistance and film-forming performance, and the powder coating rate is high when electrostatic spraying is adopted, and the obtained film layer can be uniform, smooth and smooth.

The invention provides a technology for carrying out electrostatic coating on a surface of a non-conductor. The non-conductor comprises glass, plastic and the like. Ordinary low-temperature epoxy polyester powder coating which is sold on the market is adopted, the coating is divided into two parts, namely conductive treating and the electrostatic coating. The technology comprises the specific steps of polishing, cleaning, super-hydrophilic embellishing, tap water atomizing, the electrostatic coating and solidifying. The conductive workpiece surface is required by the electrostatic coating. Due to the fact that a conductive water film which is even, extremely thin and free of fluidity is formed on the workpiece surface, the technical limitation that the electrostatic coating is carried out on the surface of a non-conductive insulating body is solved. Due to the fact that the water film is even and free of the fluidity, the influence on powder adhering by water flowing is avoided. Before heating and melting are carried out on powder, the water film is evaporated rapidly, and a bubble or a hole is prevented from forming in a painting film. The technology has the advantages of being environmentally protected, low in cost, low in energy consumption, simple in procedures, high in powder utilization, and even in coating layer.

The invention provides a modified polyamide powder coating and a preparation method thereof. The modified polyamide powder coating comprises, by weight, 40-94 parts of polyamide resin, 3-25 parts of flexibilizers, 1-15 parts of powdering modifiers, 0.5-6 parts of light-screening agents and 0.05-5 parts of other auxiliaries. The modified polyamide powder coating has the advantages of excellent mechanical property and high powdering rate.

The invention belongs to the technical field of powder coating classifying equipment and relates to powder particle classifying equipment, in particular to a separator capable of controlling particle size distribution in a high-precision mode. The separator capable of controlling the particle size distribution in the high-precision mode comprises a discharge hopper, a separation chamber, a classification chamber and a feed pipe, and is characterized in that a gap allowing tiny air flow to pass is formed in the connection portion of the discharge hopper and the separation chamber, the periphery of the gap is provided with a pneumatic control assembly communicated with an external air source, and the pneumatic control assembly comprises a pneumatic pipeline, a control valve and an air flow buffer air chamber, wherein the pneumatic pipeline is connected to the gap in the tangent direction, and the air flow buffer air chamber surrounds the gap. The separator greatly increases the controllability over particle size distribution, is high in separation accuracy, increases the content of powder with the particle size smaller than 10 micrometers in the powder, and further improves product quality and the powdering rate.

The invention provides a heat-resistant and flame-resistant powder coating for a gas-cooker body surface layer. The heat-resistant and flame-resistant powder coating is prepared from, by weight, 8-10 parts of organic silicon resin, 10-20 parts of thermosetting fluorocarbon resin, 20-30 parts of hydroxyl polyester resin, 2-4 parts of isocyanate curing agent, 1-2 parts of 3-glycidoxypropyltrimethoxysilane, 5-8 parts of ferric oxide, 4-6 parts of ethylene-propylene-diene monomer, 5-10 parts of silica micropowder, 2-4 parts of zinc oxide, 4-6 parts of zirconium oxide, 15-20 parts of kaolin fine powder, 1-2 parts of bi-( 3,5-tertiary butyl-4-hydroxy phenyl ) sulfide, 5-8 parts of magnesium hydroxide, 8-10 parts of aluminum hydroxide, 0.5-1.0 part of 2-ethylhexyl methacrylate, 1-2 parts of polyvinylpyrrolidone, 0.2-0.4 part of acrylic ester flatting agent, 6-8 parts of carbon black and 3-4 parts of modified assistant. The heat-resistant and flame-resistant powder coating is good in heat resistance and flame resistance, low in curing temperature, short in curing time, good in coating flatting performance, high in adhesive force, good in coating appearance and resistant to acid and alkali, and can be applied to the gas-cooker body surface layer.

The invention discloses a preparation method for a copper rotating target material. The preparation method for the copper rotating target material comprises the following steps that (1) copper powderis prepared; (2) a back pipe is subjected to surface sand blasting treatment; and (3) the back pipe subjected to sand blasting treatment is mounted on a rack, the back pipe is driven to rotate and move in the axial direction by the rack, cold spraying process parameters are set, the copper powder is sprayed to the surface of the back pipe through a spray gun to form a copper coating, and the copper rotating target material is obtained after the copper coating reaches the required thickness. The copper rotating target material prepared through the preparation method is high in relative density,adjustable in coating thickness and high in copper powder comprehensive powdering rate.

The invention belongs to the powder coating field, and specifically relates to a modified oxide and a powder coating, and preparation methods and applications thereof. The invention aims to provide the modified oxide which can balancedly improve the levelling property and fluidization of the powder coating, and the preparation method thereof, and the powder coating prepared by the modified oxide. The preparation method of the modified oxide comprises the following steps: a, dissolving an oxide and a modifier by a solvent to obtain a mixed material; b, controlling the mixed material temperature, and stirring to volatilize the solvent; and c, grinding the mixed material obtained by volatilizing the solvent in the step b into the modified oxide with the particle size of 10-100 nm, wherein the oxide of the step a is at least one of nano fumed silica and alumina C.

The invention discloses a preparation method of organically modified graphene with a core-shell structure, an anticorrosive powder coating and a preparation method of the anticorrosive powder coating.The preparation method of the organically modified graphene with the core-shell structure comprises the following steps: dissolving graphene, polyamide wax and polyethylene wax in a mixed solution ofxylene and ethyl acetate, carrying out uniform stirring, and carrying out freeze-drying to obtain primary modified graphene; and adding the primary modified graphene into a polytetrafluoroethylene emulsion, and carrying out freeze-drying to obtain organic modified graphene with the core-shell structure. Through the preparation method of the organically modified graphene with the core-shell structure, graphene can be organically modified twice to form the core-shell structure; and the prepared organic modified graphene with the core-shell structure is applied to the anticorrosive powder coating, so that corrosion resistance, weather resistance and mechanical properties of the coating are effectively improved.

The invention discloses a preparation method for a spherical monocrystal tungsten powder for thermal spraying. The preparation method comprises the following steps: firstly adding a certain amount of a mixture of lithium carbonate and sodium chloride in an ammonium tungstate solution as a mother solution, and concentrating to obtain a precursor through heating drying; then selecting a spherical tungsten powder as a mother crystal, adding the spherical tungsten powder in the precursor according to a certain ratio, uniformly mixing, and then placing the mixture in a tubular reduction furnace and carrying out hydrogen gas reduction, and then sequentially carrying out ultrasonic cleaning, vacuum drying and grinding spheroidization to prepare an intermediate; and carrying out airflow classification on the prepared intermediate to obtain the spherical monocrystal tungsten powder. The preparation method disclosed by the invention is simple in process equipment and high in production efficiency; and the prepared spherical monocrystal tungsten powder has a perfect crystal, compact particles, a high sphericity degree, high flowability, a high purity, a high coating hardness, a high powder-applying rate and a low porosity.

The invention discloses a carbon nanostructure reinforced explosion-proof surface material which is excellent in barrier explosion-proof performance and can be industrially produced, and a preparationmethod thereof, and particularly discloses a carbon material (such as graphene) reinforced epoxy powder paint and preparation method thereof. The paint is characterized by comprising 2 to 5wt per thousand of carbon nanometer material. According to the paint, a modified carbon material is added in a specific silane epoxy additive, an additive material is sufficiently refined through a tertiary grinding and dispersion technology, carbon material is intensively dispersed, an epoxy powder paint finished product is obtained through traditional technologies of crushing and sieving, and reinforced explosion-proof barrier powder paints with different trace contents and ratios are sufficiently prepared. The paint belongs to special coating developed for an HAN (Hypostasis Anch Noexplosion) barrierexplosion-proof technology, can effectively prevent explosion of inflammable, explosive, gaseous and liquid dangerous chemicals caused by fortuitous accidents (such as static electricity, welding, shooting, collision and faulty operation) during storage and transportation, and thoroughly solves the intrinsic safety problem of the inflammable, explosive, liquid and gaseous dangerous chemicals during storage and transportation. The high-performance explosion-proof paint can be widely applied to military products and military and civilian products, such as vehicle manufacture, military vehicle armor, military helmets and building curtain walls.