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 of 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.