Hexpol invests in devulcanisation in Europe

The rubber compounding arm of the Hexpol Group has announced an investment in a devulcanisation line in Europe. This allows the company to offer mechanical devulcanisation of rubber in-house and supports the transition to a circular economy.

For years, Hexpol Compounding has worked on using cured compound scrap and waste, which are unavoidable side products of rubber part production. In the past, the converter paid for the disposal of their rubber waste, which often ended in landfills or was incinerated. In some cases, rubber waste was ground and reused, but until now, it was mainly used as a filler in low-quality applications.

Devulcanisation offers an opportunity to keep these valuable resources in circulation and reduce the demand for virgin materials and thus decrease the amount of unused scrap.

Devulcanisation can transform cured rubber parts into an uncured state again. The devulcanised material still contains the polymer, carbon black or other fillers and plasticiser of the original compound. This results in a raw material base for producing new rubber parts and demonstrates that rubber can be recycled.

“Hexpol´s target is to reprocess cured rubber from post-industrial sources and reuse it for typical rubber applications in the automotive or building and construction industry,” explains Carsten Rüter, President of Hexpol Rubber Compounding Europe & Asia. “Instead of paying for disposal, we support our customers in transforming their rubber production offcuts into a new raw material with a reduced product carbon footprint.”

The devulcanisation process adds no additional chemicals. It involves solely the use of mechanical forces like shear, compression, and temperature to break down the crosslinking bonds of the cured rubber with the help of a specific extruder.

The investment will enable Hexpol Compounding in Europe to produce several thousand tons of compounds with devulcanised rubber content per year.

Ralph Wolkener, President Hexpol Compounding Europe & Asia commented, “We are proud to offer a variety of compound solutions with recycled content already today. Soon, we will add rubber recycling to our services. Our customers are becoming our business partners in this process, which involves collecting and sorting their production side products, until Hexpol transforms them into devulcanised raw materials again.” He adds, “We believe our devulcanisation process could also be extended to post-consumer rubber recycling”.

The new extruder will be installed at the Hexpol Compounding site in the Czech Republic in late 2024, where it will provide devulcanisation services to the other European Hexpol sites to ensure that a broad customer base can join the circle.