When rubber is formed into a tire, it is vulcanized. This is a process where the rubber is mixed with sulfur and exposed to heat. The result is a hard, durable rubber product – the tires we know today. Vulcanized rubber is difficult to reuse because it cannot be easily reformulated or remixed – but that’s exactly where Tyromer devulcanization gets to work.
Simple is Better. Tyromer’s patented devulcanization process is straightforward – Crumb rubber is fed into the extruder, and devulcanized rubber is extruded out. No chemicals added, no additives at all.
The chemistry is more complicated but can also be explained. We use a supercritical carbon dioxide assisted, thermal-mechanical extrusion process to continuously convert scrap tire rubber into Tire-Derived Polymer, or TDP. A technical explanation written by Tyromer technology inventor Professor Costas Tzoganakis is available in this RubberWorld Magazine article.
In the video to the left you can see crumb rubber being fed into the extruder in the size of about 20 mesh. The resulting product is our devulcanized rubber, TDP.
The product/packaging form of TDP can vary – in this video, the form is a continuous strip. However, slabs of 10kg are the most common form. Some facilities also offer rubber straining where the devulcanized TDP is pushed through a fine mesh screen to filter out any remaining particulate. The Tyromer Windsor and Tyromer Europe facilities both have straining capability and produce 10kg slabs.
The Following Unique Benefits
No devulcanization chemicals or
chemical solvents are used
Converts crumb to TDP in less than 2
Countinuous operation by
reliable extrusion equipment
Technology produces high-quality
Consumes less than 200 kWh per
Metric Ton of TDP
Works for scrap tire crumbs, EPDM
and other rubbers