Paint Particle size distribution have specific impact of electrostatic spray powder coating performance:
1, Appearance, leveling
In general, the smaller the particle size powder, the better leveling when cured coating, the coating appeara-nce is more smooth, but proportional to the square of the particle size of the charged powder, the powder is too fine reduced chargeability, coating construction efficiency will drop, ultra-fine powder (particle size <10μm) is substantially uncharged.
2, The extraction rate
The extraction rate and charging performance powder coating itself has an important relationship. Improve paint particles with electricity, the extraction rate will increase. Particle charge amount and particle size proportional to the square. Increasing the particle size, coating particles with the increase in electricity, the extraction rate increased. But the size of the particles can not be too large, the particle size is too large, gravity paint particles exceeds aerodynamic and static electricity, but to make the extraction rate is reduced.
3, Recovery
Powder coatings in the production and use of recycled powder there are problems, as usually, When powder particle size <10μm, ultrafine powder recovery rate is low, when the powder particle size> 10μm powder coating recovery time rising rapidly, and the powder recovery with the particle size increases.
Based on the above reasons, it can be said that the particle size distribution of the powder coating particles largely affects the performance and efficiency of powder coatings. Therefore, the need for particle size measurement equipment monitoring product quality and new products and technology research and development assistance.