Abstract: Residence time of plastics in single screw extruders is an important parameter of polymer processing. The residence time in single screw extruders with groove barrels is different from that of traditional single screw extruders. We provide a new method to analyze the residence time in an extruder. Experiments showed that under the same screw speed, the residence time in single screw extruders with groove barrels was lower than that of traditional single screw extruders and IKV single screw extruders. Single screw extruders with groove barrels can effectively improve extrusion melting efficiency and solve the contradiction between high solid conveying efficiency and low melting efficiency.

Key words: residence time, melting theory, single screw extruder with grooved barrel