Paste and Compound Viscosity Management
topic
Coating compound viscosity management maintains the target viscosity of PVC plastisol, polyurethane, acrylic, and silicone coating compounds within the process window of 5000 to 100000 centipoise for knife coating through temperature control of the compound in heated troughs, continuous viscosity monitoring by inline viscometers with feedback to temperature control systems, and compound agitation preventing settling of high-density filler particles in filled coating formulations.
Role
Maintains consistent coating weight and surface quality by ensuring compound rheological properties remain within the specification range for each coating formulation, with viscosity variation being the most common cause of coating weight drift on running production that requires real-time monitoring and correction to prevent the coating weight deviation that would produce out-of-specification barrier or physical performance in the finished coated product.