The primary raw material in DROPTEC Protection and Drainage Membranes is polyethylene (PE). Recycled polyethylene foam flakes of varying grain size are permanently bound together in a thermal process – without the use of adhesives or chemical additives – to form sheets and mats.
Only closed-pore polyethylene foam is used, which takes up hardly any moisture, thanks to its cross-linked structure. Cross-linked polyethylene (PEX) is characterised by its excellent dimensional stability, low creep, high temperature resistance, high chemical resistance and insusceptibility to static pressure loading.
The open structure between the individual foam flakes ensures excellent gas and water permeability and a high drainage capacity.