Rayon fibers containing starch

Process for preparing starch-containing rayon fibers which comprises dissolving corn starch granules in an aqueous alkaline medium which contains between 2 and 41/2% NaOH based on the total weight of water and NaOH, the concentration of starch in the resulting solution being about 6 to 20%, and blending said solution with viscose and extruding the starch-containing viscose in fiber form and regenerating the cellulose in the extruded viscose to form starch-containing regenerated cellulose fibers, said starch having an amylopectin content of at least 60 percent.

Process for producing rayon fibers which comprises extruding a viscose solution, containing about 5 to 25% dissolved starch b.o.c., to form a plastic stretchable fiber and then stretching said plastic fiber at least 50% to form fibers having a tenacity of at least about 2 grams per denier, said starch having an amylopectin content of at least 60 percent.

Process which comprises extruding in fiber form a viscose containing about 5 to 100% dissolved starch b.o.c. and an anionic polymer dispersed in said viscose and coagulating the extruded solution to form fibers containing dispersed anionic polymer and having an increased fluid holding capacity because of the presence of said anionic polymer, said starch having an amylopectin content of at least 60 percent.

Process which comprises extruding in fiber form a viscose containing about 5 to 100% dissolved starch b.o.c. and polyvinylpyrollidone and coagulating the extruded solution to form fibers having increased fluid holding capacity because of the presence of said polyvinylpyrollidone, said starch having an amylopectin content of at least 60 percent.