In electrostatic powder coating, the reasons for the poor hiding power of the coating film are due to two factors: the powder coating itself and the powder coating.
Considering the powder coating itself, when designing the formula of the powder coating, the amount of pigment with hiding power is not enough, so that the coating film of the powder coating does not have enough hiding power. kind of problem. When using organic pigments with strong coloring power but poor hiding power, other pigments with strong hiding power are not used together or the amount of pigments with strong hiding power is not enough. For example, when preparing red powder coatings, while using organic pigments, If you do not use Chin White powder together or add insufficient amount of Chin White powder, it is prone to the problem of poor hiding power.
From the perspective of powder coating, the thickness of the coating film is closely related to the hiding power of the coating film. If the thickness of the coating film is too thin (40~50µm), the problem of poor hiding power will easily occur. Therefore, it is more appropriate that the thickness of the coating film should be sprayed to at least so-so,,m. If the thickness of the coating film has reached 60~80µm, but the hiding power of the coating film is not very good, it means that the hiding power is not fully considered in the formula design of the powder coating. From the perspective of powder coating, it can only be solved by taking measures to increase the thickness of the sprayed coating. In order to make the hiding power of the powder coating meet the user's requirements, the Fenwei Coating Factory proposes the requirements for the coating film thickness to the Fenwei Coating Factory, and the powder coating factory then designs a reasonable powder coating formula according to the requirements of the coating thickness, so that the powder can be made The hiding power of the coating product satisfies the powder coating factory. As long as the thickness of the coating film meets the requirements, there will be no problem of poor hiding power of the coating film.
