Factors affecting the properties of powder coatings
; ; powder coating is a new type of solid powder coating without solvent. With no solvent, no pollution, recycling, environmental protection, save energy and resources, reduce labor intensity and film mechanical strength.
; particle size distribution has a great influence on the quality of powder coatings, which includes many aspects, such as appearance, flow level, powder, stability, recovery and so on. Generally speaking, powder particle size is smaller, curing powder when leveling better, appearance is smooth, but reduced powder too fine charged, coating construction efficiency will decline, ultrafine powder basically uncharged and powder is too thin will powder production cost increase. The powder rate is mainly determined by the charge of the powder particles, and the charge of the powder is proportional to the square of the particle size. Increasing the particle size, increasing the electric charge amount and increasing the powder rate. But the powder particle size should not be too big, the particle size is too large, large granular powder of gravity over air dynamic and static electricity, powder coatings in flight process, due to the gravity effect did not reach the surface of the workpiece have already fallen, but will make powder rate decreased.
