Johns Manville (JM) has launched a thermal recycling unit for waste glass fibers in its Engineered Products plant in Trnava, Slovakia.

The Trnava unit has a projected recycling capacity of more than 3 tons per hour and consists of a warehousing area, feeding and transportation equipment, shredder, burning chamber and milling.

After processing, the recycled glass powder is free of organic particles and re-fed as raw material into the glass production process on-site, thus achieving a closed production loop.

The project will keep more than ten thousand tons of waste out of landfill each year, the equivalent of one large truck every day.

“We have invested nearly €10 million into the technology and made sure the recycling capacity will allow further glass fiber production capacity growth in Trnava,” said Martin Nywlt, Director of Global Operations for JM’s Engineered Products business.

The aim is to achieve a positive environmental impact by reducing the landfilling of glass fiber waste and is part of its response to the European Commission’s zero waste programme and its target for sustainable management.

For more information about the Trnava recycling line, go to