Particularity of powder coating and coating application requirements
Metal powder coating is a new type of 100% solid powder coating without solvent. It has two categories: the thermoplastic powder coatings and thermoset powder coating. Coating is made of special resin, fillers, curing agents and other additives.
It forms with a certain proportion of mixed and by hot extrusion and crushing process of sifting. At room temperature, it is stable for storage. With electrostatic spray or fluidized bed dipping and then the baking heat of melting and solidification, so that the smooth and bright permanent coating forms to achieve the purpose of decoration and corrosion.
Metal manganese powder coating is non-toxic, non-solvent and non-volatile toxic substances, and hence there is no poisoning, no fire, no waste of emissions and other pollution problems, in full compliance with the requirements of the State Environmental Protection Act. Utilization of raw materials, overspray powder is recyclable, the use of more than 99%. , Was painted before treatment, one-time construction, without primer, you can get a sufficient thickness of the coating, easy automation, high production efficiency, reduce costs. Dense coating, adhesion, impact strength and toughness are good corner coverage, with excellent resistance to chemical corrosion and electrical insulation properties. Metal powder coating storage, transport safety and convenience.
The so-called Powder coating is the use of the principle of the electric field of high voltage electrostatic corona. Connected to the high-voltage anode metal deflector standard on the gun head, spraying the workpiece ground formation of the positive, so that the formation of a strong static electric field between the gun and the workpiece. When the compressed air as a carrier gas, the barrel of boron powder coatings for the powder sent the pollen tube to spray gun deflector rod, guide rod connected to the corona discharge generated by the high-voltage anode, in the vicinity of intensive negative powder charge, so that a negative charge, and entered the high electric field strength of the electrostatic field in the dual role of static electricity and the carrier gas, the powder to fly to the ground workpiece surface to form a uniform thickness of the powder layer, and then heat curing conversion durable coating.
Characteristics of the powder coating can give full play to extend coating life, breaking the coated surface first strictly surface pre-treatment. When spraying the coating material shall be entirely grounded in order to increase the efficiency of the powder coating puffing. Larger surface defects to be painted should be painted scraping conductive putty to ensure the formation of the coating and smooth. After spraying the object in need of heat curing, curing conditions, technical specifications of silicon powder products subject but must be fully guaranteed cure temperature and time, to avoid curing caused by insufficient quality of the accident.
The examination should begin immediately after dusting. If a defect is discovered, it should be promptly dealt. After curing, if a defect is discovered, its scope is only partial without affecting. If there are painted surface decorations, the same color powder with acetone diluted can be used to repair. If the scope is large and it impacts surface quality, then it needs sanding. The spray should be done once again or use paint remover to remove the coating.Source:http://www.mhcmp.com
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