Pelletization is a downstream operation for a melt extrusion process where

materials are taken from a device such as an extruder or melt pump, pumped

through a die, cooled, and formed into a ‘‘pellet.’’ Many products enter their

first solid or densified state in a ‘‘pellet’’ form. This pellet, typically 3 mm in size or less, is then processed in another extruder, or molding machine. The

main goal of pelletization is to facilitate the consistent feeding, transport, and

packaging of the pellets. Generally, the pellet itself is made up of multiple

components that have been compounded in a device, such as a twin-screw

extruder, so that the material has desired properties.