There are 3 types:
single screw method, twin screw method and internal mixing method.
--Single-screw method: After mixing the materials with a mixer, they are stretched and pelletized by a single-screw extruder. The carbon black concentration is generally 18-20%.
--Twin-screw method: After mixing the materials with a mixer, they are pelletized by a twin-screw extruder or water ring. Due to the limited mixing capacity of the twin-screw machine, the masterbatch generally has a carbon black concentration of 25-32% .
--Banbury mixing method: After mixing the materials with a mixer, adding them to the internal mixer for kneading, then the feeder is fed into the twin-screw extruder, pelletized by water ring or underwater, the masterbatch generally has a carbon black concentration 40-45%.
