Four methods to improve the powder rate of powder coating

(1) To control the particle size distribution of the powder, the narrower the better: to control the particle size of the powder reasonably (relatively difficult), in our actual production, only by adjusting the main and secondary grinding speed of ACM, to control the particle size of the powder (40 ~ 50 μ m), the narrower the distribution is, the better (2) increase the resin content: increase the resin content and reduce the filler content In comparison, the powder loading rate of epoxy is better than that of polyester (3) reasonable selection of fillers: the fineness and dispersion of fillers are closely related to the powder loading rate The powder property of precipitated barium is higher than that of superfine heavy barium, and that of barium sulfate is better than that of calcium carbonate (4) add electric assistant: add electric assistant in the formula (mechanism: it can make powder particles carry more electric charge) There is a strong electric field in the area from the high-voltage electrostatic spray gun to the workpiece, and the air is ionized to produce hundreds of millions of ions When the powder particles of the electrostatics pass through this area, they are polarized, which can catch more negative ions and carry more charges Due to the weak power line of Faraday effect, the powder particles with more charges can reach the surface of the workpiece by their own force, so as to improve the powder loading of these parts "