How To Improve Powder loading Rate Of Powder Coatings?

1. The narrower the powder size distribution, the better: to control the powder size reasonably, we have to adjust the rotation speed of the main and auxiliary mills of ACM in our actual production. The particle size of powder is important, 40-50um is suitable, and the narrow distribution is better.

2. Increase the resin content: increase the amount of resin, reduce the amount of filler, select the resin with good electrical performance, epoxy powder is better, some manufacturers polyester powder is not, some manufacturers polyester powder is more difficult (separate epoxy, polyester powder spray plate grinding), the leveling of friction gun is obviously better than electrostatic gun, and friction gun can spray a thicker coating, coating does not have the shortcomings of high-pressure gun Such as big orange peel.

3. Reasonable selection of fillers: the fineness and dispersion of fillers are closely related to powder feeding.

4. Add charged additives: add conductive additives in the formula (mechanism: can make the powder particles with more 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. The powder particles of the booster are polarized when passing through this area, which can capture more negative ions and carry more charges. For the dead corner of the groove, the power line is weak due to the Faraday effect, and the powder particles with more charge can reach the surface of the workpiece by their own force, so as to improve the powder loading in these parts.)