Devulcanised tyre tread

Meysami and Tzoganakis [27,28] of Waterloo University in Canada have used an industrial-scale twin-screw extruder with supercritical CO2 to devulcanise waste tyre rubber, tyre tread rubber and EPDM... 

A wide range of commercial products were produced from the tyre tread rubber that had been devulcanised using the DevulCOi... 

Table 5.1 Commercial products manufactured using tyre tread rubber devulcanised using the DevulC02 process ...

Sangari and co-workers [18, 19] have used a two-litre Banbury intermixer and a combination of accelerators with a peptiser to devulcanise both standard SBR compounds (unfilled and filled) and ground tyre tread. The devulcanisation recipes that were used in the study are shown in Table 5.3. 

The properties of the fine, devulcanised rubber crumb that results from the process varies according to the types of additives used and their levels, and the crumb has been shown to be used effectively to replace virgin rubber in new rubber compounds. For example, experimental trials have been undertaken with rubber crumb obtained using this technology from car tyre treads incorporated into SBR compounds. The results that were obtained on the resulting vulcanisates were compared to those produced using conventional rubber of the same... 

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