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China Coatings Online News Information:
Powder coating on the powder rate increased four methods of analysis: 1, control powder particle size distribution, the narrower the better: reasonable control of powder particle size (more difficult), in our actual production only adjust the ACM's main and sub-grinding speed. Powder particle size important 40-50UM is appropriate, the distribution is about narrow the better.2, improve the resin: improve the amount of resin to reduce the amount of fillers, choose a good charged performance of the resin, epoxy is better on powder, some manufacturers polyester powder is not powdered, some manufacturers polyester powder is more difficult (separate epoxy, polyester grinding into powder spray plate), friction spray gun spray level is obviously better than static gun, and friction gun can spray a thicker coating, coating no high-pressure gun shortcomings such as large orange skin.3, reasonable choice of fillers: filler fineness and dispersion and powder is very between. The precipitation powder is higher than the general ultra-fine heavy radon, and the sulfuric acid is better than the calcium carbonate.4, increase the charged additives: in the formulation of the appropriate amount of conductive aids (actuation: can make powder particles carry more charge. There is a strong electric field in the area from the high-voltage electrostitive gun to the work piece, and the air is ionized to produce hundreds of millions of ions, and the powder particles of the booster are polarized as they pass through the area, trapping more negative ions and carrying more charge. For groove dead corners and other parts due to the Faraday effect power line is weak, then the powder particles with more charge can rely on their own strength to reach the surface of the work piece, thereby improving the powder on these parts.