Solving Two Key Powder Coatings Challenges with Pelletized Aluminum

Any material that does not adhere to the substrate after spraying can be collected and used again, resulting in very little waste. Since a solvent-free effect pigment powder must be used in powder coatings, a large release of dust is caused as it is being processed and handled. Aluminum pastes, powders and pellets fall into specific categories for transportation and storage in each region of the world, depending on local regulations. Because of their reactive nature, aluminum powders are classified in the United States by the Department of Homeland Security as "Chemicals of Interest." Platelet-shaped aluminum pigments have excellent hiding power when compared to spherical pigments. Because of their shape, they are very susceptible to bending and breakage under high-shear mixing, like extrusion, and are typically incorporated into powder coatings in subsequent processing steps. [...]the color travel data suggest that the pellets have a better overall orientation in this powder coating compared to unpelletized pigments.