PROCESS FOR PRODUCING PELLETS OF GLASS-FIBER-REINFORCED THERMOPLASTIC RESIN COMPOSITION

摘要

A process for producing pellets of a glass-fiber-reinforced thermoplastic resin composition is provided with which the productivity of pellets of a glass-fiber-reinforced thermoplastic resin composition can be rendered higher than in conventional processes and it is possible to minimize the probability that monofilament masses (unfibrillated glass-fiber bundles) remain in the produced pellets. In the process, a thermoplastic resin and glass fibers are kneaded with a screw which comprises a screw element having a specific shape, and pellets of a glass-fiber-reinforced thermoplastic resin composition are produced under specific conditions. The screw element having a specific shape is a single-thread back-feed screw element which has a flight part having circular-arc-shaped notches.