Process for recycling and de-vulcanizing rubber
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United States of America Patent
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Dec 27, 2016
Grant Date -
May 30, 2013
app pub date -
Aug 5, 2011
filing date -
Aug 5, 2010
priority date (Note) -
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Abstract
The process for recycling and de-vulcanizing vulcanized rubber comprises the steps of: grinding said rubber in a mill in order to shred it into particles having a size substantially comprised between 5 and 15 mm; introducing the particles in an initial section of a two-screw co-rotating extruder having a length 64 times or more the external diameter of the screws, mixing the particles within the extruder, which is kept at a temperature comprised between 35 and 350° C., due to the screw rotation at a speed comprised between 15 and 300 rpm; and obtaining an extruded product formed by de-vulcanized rubber.
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