A dual function, composite absorber/barrier battery separator for alkaline cells is comprised of a moderately cross-linked polyvinyl alcohol film and a flexible, fibrous and wettable absorber web, the film being semipermeable to electrolyte flow. The film is mechanically bonded to a top surface of the...http://www.google.com.au/patents/US4361632?utm_source=gb-gplus-sharePatent US4361632 - Alkaline battery, composite separator therefor
