Rehau Window Solutions presented its RAU-INFINIO technology at the Fensterbau Frontale 2026 exhibition. The system concerns window profiles reinforced with long glass fibres instead of traditional steel.
The new technology enables the production of large window elements over three metres in height. At the same time, the profiles remain slim and visually lightweight.
The solution is based on thermoplastic pultrusion (continuous extrusion of a profile from heated material). Almost endless glass fibres fully encapsulate the plastic. They are joined via corner connectors using injection moulding. Welding of the profiles is not required.
The mechanical performance of RAU-INFINIO profiles is comparable to aluminium. This is significantly better than profiles reinforced with short glass fibres currently available on the market.
“RAU-INFINIO opens up applications that were previously reserved for aluminium and combines them with the advantages of plastic in terms of thermal insulation, sustainability and processing,” the company explains.
The profiles feature a continuous cross-section without weak points. This ensures full load transfer. Production is automated and stable in process.
A key advantage is the full recyclability of the material. As thermoplastic binders are used instead of resins, the profiles can be recycled repeatedly. The company deliberately collects hybrid materials separately in order to preserve their quality.
“We deliberately collect hybrid materials in sorted fractions. They are particularly valuable and enable multiple recycling cycles. Our partners and customers benefit from this important step towards a fully closed-loop production system,” says Robert Adams, Head of Sustainability and Circular Economy at Rehau Window Solutions.
The company also notes that RAU-INFINIO opens up market niches that were previously occupied only by aluminium. At the same time, plastic profiles retain their traditional advantages: better thermal insulation, ease of processing and lower weight.