ABSTRACT
This chapter investigates the basic mixing behavior in a two-dimensional internal mixer equipped with the various shapes of the separated counterrotating rotors by visualizing methods, and the rotors showing good mixing ability have been found. Experimental work was carried out with a two-dimensional mixer with various types of rotors. The effect of the shape of the rotors on the mixing behavior of BR rubber in a two-dimensional internal mixer was shown, and it is obvious that the void in the mixer affects the mixing behavior. The mixing behavior of BR rubber and the tracer rubber particles in a three-dimensional internal mixer was investigated using a vulcanization reaction to fix the rubber particles in the rubber. Various types of batch internal mixers in which carbon black, additives, and vulcanizing agents were incorporated into solid rubbers have been used for a short time in the rubber industry.
