A twin screw extruder for mixing carbon black with rubber and with a first mixing zone with single screw extruder elements for heating rubber to about 130°-220° C., and a second port for adding carbon black and a third port for adding oil.
Upon running the recipes through each test, the test results included the following:
1. Traditional stress/strain mechanical properties. This measured the overall quality of mixing process and distributive uniformity.
2. Thermal gravimetric
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