of at least a portion of the carboxylic acid groups with a salt forming cation such as metal ions having valences of 1 or greater or with ammonia or organic bases such as amines generally at least about 10 to 100 of the acid groups are neutralized for use in the practice of the invention ionomers contemplated for use in the practice of the invention include those copolymers or terpolymers having cations of sodium potassium lithium calcium magnesium barium aluminum titanium and cations derived from ammonia or amines and blends thereof that include at least one chemical group derived from an ethylenically unsaturated sulfonic acid or carboxylic acid or anhydride precursor of an ethylenically unsaturated carboxylic acid ionomers commercially available for use in the practice of the invention include sodium potassium calcium magnesium and aluminum salts of ethylene and acrylic acid copolymers sold by allied signal inc morristown n j under the trade name aclyn specific ethylene and acrylic acid copolymers are 77 ethylene and 23 acrylic acid and 67 ethylene and 33 acrylic acid olefin maleic anhydride copolymers and terpolymers are available from s c johnson amp son inc racine wis and can be converted at least in part to salts by treatment of the resin with a base mixtures of ionomers behave similarly to single ionomers for example fibers from a.