The effect of powder particle size on coating properties is as follows:

First, powder coating

　　It is a protective and decorative substance, or a property of both, which is formed by applying a coating powder to an underlayer, and then using thermal or radiant energy to melt the coating to a continuous film. The coating powder is finely divided into organic polymer particles, which generally contain pigments, fillers and additives which are finely divided when stored under appropriate conditions and stored. In contrast to waterborne coatings, waterborne coatings may contain volatile organic solvents that achieve the same or better properties as waterborne coatings, such as good quality, durability, and corrosion resistance. Production costs are lower than liquid coatings because the production of powder coatings is an efficient process and requires less energy and labor. Because powder coatings do not have volatile organic solvents, its more attractive benefits are the elimination of organic solvent emissions and reduced waste disposal costs.

　　Second, the performance of a powder coating is affected by various factors. The size of the powder particles can have a major impact on performance in many stages of the production process, including processing, charging, delivery, and coating characterization. The formulation of the coating is different and depends on the requirements of the application, such as the thickness of the coating, the shape of the object being coated, and the surrounding environmental conditions.