US Patent 9869037 Method of producing a swellable polymer fibre

A swellable polymer based fiber and a method of preparing the same optionally comprising glycol, lecithin and optionally an antimicrobial metal species suitable, for example, for medical applications including wound dressings. A method of manufacture may comprise fiber extrusion or spinning involving one or a plurality of in-series coagulation baths to add single or multiple antimicrobial metal species to the as-formed fiber.