Fluid absorbent cellulose fibers containing alkaline salts of polymers of acrylic acid, methacrylic acid or an acryloamidoalkane sulfonic acid with aliphatic esters of acrylic acid or methacrylic acid

摘要

An alloyed cellulosic fiber containing an alkali metal salt or ammonium salt of a copolymer or terpolymer of acrylic acid and/or methacrylic acid and an aliphatic ester of at least one of the acids is prepared by a process wherein the copolymer or terpolymer is mixed with a viscose solution and the mixture is extruded through a spinneret into a conventional spin bath and processed into staple fibers which are adapted to be used in absorbent articles and the like. The alloyed cellulosic fiber of the invention has increased fluid absorbency characteristics over the fibers of the same cellulose composition without the alloying material. An unsaturated aliphatic dicarboxylic acid such as maleic acid or anhydride may be incorporated in the copolymer or terpolymer. Also, a copolymer or terpolymer of acrylic acid or methacrylic acid and an aliphatic ester of acrylic acid or methacrylic acid may contain radicals obtained from acryloamidoalkane sulfonic acid or an unsaturated phosphorous acid.