Electrostatic spraying technology is one of the widely used powder coating technologies due to its high efficiency, simple operation, and cost-effectiveness.

However, some limitations of powder coating equipment have restricted the application and promotion of powder coatings. For example, powder coatings cannot be applied to large-scale painting and are not suitable for painting on surfaces of complex shaped workpieces. In addition, the use of some powder coatings on air compressors makes the operation more complex and cumbersome, which is not conducive to the market growth of this coating process.