PFAS Restrictions Spur Innovation In Waterproof Breathable Textiles
Restrictions on per- and polyfluoroalkyl substances (PFASs) are accelerating the development of alternative membranes and finishes for waterproof breathable apparel, according to a report by Textiles Intelligence.
The 50-page report, Waterproof breathable fabrics: changing legislation is driving innovation, examines how regulatory pressure and growing consumer awareness are reshaping materials used in outdoor clothing.
PFASs have traditionally been used in waterproof breathable membranes and durable water repellent (DWR) finishes to prevent water penetration and impart surface repellency. However, their environmental persistence and health concerns associated with certain substances have intensified efforts to develop alternatives.
Manufacturers are exploring bio-based polyurethanes and fluorine-free membranes, among other options. The challenge is to maintain an effective balance between protection against rain and the release of moisture vapour, while meeting performance requirements across different applications.
Garments intended for prolonged exposure to severe weather, for instance, require greater resistance to water penetration than those designed for everyday use.
A significant development is W L Gore & Associates’ introduction of an expanded polyethylene (ePE) Gore-Tex membrane. It provides an alternative to the company’s original expanded polytetrafluoroethylene (ePTFE) membrane, a fluoropolymer belonging to the PFAS group.
The report forecasts continued growth in demand for waterproof breathable fabrics, supported by their widespread use in outdoor apparel and the increasing popularity of outdoor pursuits.
As restrictions evolve, manufacturers will face growing pressure to improve alternative technologies while delivering the protection, comfort and durability expected by brands and consumers.
