Pearlescent powder drying

Pearlescent powder, also known as pearlescent pigment, is a type of specialty material widely used in industries such as cosmetics, coatings, plastics, and printing due to its unique light-reflecting properties and iridescent visual effects. Common drying methods include flash drying, and Countinius disc dryer.

Pearlescent powder, also known as pearlescent pigment, is a type of specialty material widely used in industries such as cosmetics, coatings, plastics, and printing due to its unique light-reflecting properties and iridescent visual effects. The drying process is a critical step in its production, ensuring the material's stability, color consistency, and performance in final applications.

During production, pearlescent powders are typically synthesized by coating substrates like mica, silica, or alumina with thin layers of metal oxides (e.g., titanium dioxide, iron oxide). After synthesis, the wet powder undergoes drying to remove residual moisture or solvents. Proper drying is essential to preserve the powder's delicate structure, optical properties, and chemical integrity. Common drying methods include flash drying, and Countinius disc dryer, each chosen based on production scale, particle size requirements, and thermal sensitivity of the materials.

Key considerations during drying include temperature control to prevent overheating, which could degrade the metal oxide layers or alter the powder's hue. For instance, excessive heat may cause agglomeration or reduce the pearlescent luster. Post-drying, the powder is often sieved or milled to achieve uniform particle distribution, enhancing its reflective quality and application smoothness.