Rubber recycling is also very important environmental issue. A single screw
extrusion process as a continuous rubber recycling technology has been investigated for
the reversion o f natural rubber crumb. Various single screw extruder operating
conditions lead to different degrees of devulcanization. The effect o f screw speed and
processing temperature on the degree of devulcanization was investigated. In general, for
continuous reversion o f natural rubber compounds, the temperature of the extruder
appears to play a much more important role than the screw speed.