1. The product is non-toxic, free of solvents and volatile and toxic substances, so there is no pollution, no fire, no "three wastes" and other pollution problems, fully in line with the requirements of the National Environmental Protection Law.
2, high raw material utilization rate, powder produced by some well-known brands of powder suppliers, its overspray powder can be recycled, the highest utilization rate can even reach more than 99%.
3. After pre-treatment of the coated object, one-time construction, without the need of primer, can obtain a coating film with sufficient thickness, easy to achieve automatic operation, high production efficiency, and can reduce cost.
4, the coating is dense, adhesion, impact strength and toughness are good, corner coverage is high, with excellent chemical corrosion resistance and electrical insulation properties.
5, powder coating storage, transportation is safe and convenient.
Powder coating construction process and requirements: The so-called powder electrostatic spraying is the principle of using high-voltage electrostatic corona electric field. A high-voltage negative electrode is connected to the metal guide of the spray gun head, and the workpiece is grounded to form a positive pole, so that a strong electrostatic electric field is formed between the spray gun and the workpiece. When the powder coating is sent from the powder supply tank to the flow guide rod of the spray gun through the powdery compressed air as a carrier gas, a dense negative charge is generated in the vicinity of the guide rod due to the corona discharge generated by the high voltage negative electrode. The powder is negatively charged and enters an electrostatic field with a high electric field strength. Under the dual action of electrostatic force and carrier gas, the powder uniformly flies toward the surface of the grounded workpiece to form a thick and uniform powder layer, which is then heated and solidified into Durable coating. Pre-treatment of the coating construction process, drying, removal of water, spraying, inspection, baking, inspection, inspection, finished product, construction requirements, general powder coating construction requirements
(1) In order to fully exert the characteristics of the powder coating and prolong the service life of the coating film, the surface of the object to be coated is first strictly subjected to surface pretreatment.
(2) When spraying, the object to be coated must be completely grounded to increase the spraying efficiency of the powder coating.
(3) For coated objects with large surface defects, conductive putty should be applied to ensure the smoothness and smoothness of the coating film.
(4) After spraying, the object should be heated and solidified. The curing conditions are subject to the technical specifications of the powder product, but the curing temperature and time must be fully ensured to avoid quality accidents caused by insufficient curing.
(5) Check immediately after dusting. If defects are found, they should be treated in time. If defects are found after curing, the range is small and only partial and does not affect. The surface of the coated object is decorated. It can be repaired with the same color powder and diluted with acetone, if the range is large. If the surface quality is affected, sanding with sandpaper, spraying once again or removing the coating with a paint remover, and then re-pulping.
(6) The recovered powder shall be mixed with the new powder according to a certain ratio after screening to remove the impurities.
(7) The powder supply bucket, dusting room and recycling system should avoid contamination of other different color powders, so be sure to purge each time you change colors.
2, art-type powder coating construction requirements: art-type powder, with beautiful, three-dimensional sense, decorative effects, etc., but the construction process requirements are strict.
(1) The input air pressure during dusting should not be too large, generally controlled at 0.5-1.5kg/cm2. Too much air pressure can cause poor pattern sharpness or some pitting. The electrostatic voltage should not be too high, generally controlled at around 60-70Kv. If the voltage is too high, the powder attached to the surface of the workpiece will rebound and pitting. Defects such as poor leveling.
(2) Spraying powder should pay attention to ensure the thickness of the coating film. Generally, it can be controlled between 70-100μm to facilitate the formation of obvious patterns and large patterns. If the coating film is thin, the pattern is not obvious, and the pattern is small, and at the same time Defects such as pitting and bottoming out.
(3) It must be baked at the specified temperature and time during curing. If the temperature is too low, the powder will not be patterned, and the mechanical properties will be greatly reduced due to incomplete curing. In addition, due to the particularity of the production process of the art pattern powder, after the recycled powder is sprayed, the pattern will become smaller or less obvious, so it is generally recommended that the recycled powder of the art type powder should not be used. It must also be tested if it is used. Although the construction requirements are stricter from the above, it is believed that as long as the above factors are well grasped during the painting process, the desired satisfactory results will be achieved.
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