Combined Chemical/Plasma Treatment for Optimising Nonwoven Textile Filter Materials Applied on Gaseous and Aqueous Effluents -- XII. Influence of Some Plasma/Chemical Treatments on the Physical Properties of the Filters Made of Needlepunched Nonwovens. - Zamfir M.; Preda C.; Niculescu M.; Sirghie C.; Mihaescu D.; Minea A. (Bulletin of the Polytechnic Institute of Jassy, 2000)