Method for making high fluid-holding fiber mass

Claim 1

A method of making fluid absorbent alloy fibers comprising mixing an aqueous solution of polyvinylpyrrolidone with a filament-forming viscose, said polyvinylpyrrolidone have an average molecular weight of from about 100,000 and 400,000 and a K-value of from 50 to 100 and being present in an amount less than, but at least 6% of, the weight of the cellulose in the viscose, shaping the mixture into fibers, coagulating and regenerating the shaped fibers of regenerated cellulose containing said polyvinylpyrrolidone dispersed therein, and thereafter drying the fibers, said shaping, coagulating and regenerating being effected by extruding the viscose mixture through a spinnerette into a spinning bath comprising sulfuric acid, sodium sulfate and zinc sulfate, said polyvinylpyrrolidone being present in amount such as to increase the water-holding capacity of said fibers.

Claim 2

A method of making fluid absorbent alloy fibers comprising mixing an aqueous solution of polyvinylpyrrolidone with a filament-forming viscose, said polyvinylpyrrolidone have an average molecular weight of from about 100,000 and 400,000 and a K-value of from 50 to 100 and being present in an amount less than, but at least 6% of, the weight of the cellulose in the viscose, shaping the mixture into fibers, coagulating and regenerating the shaped fibers of regenerated cellulose containing said polyvinylpyrrolidone dispersed therein, and thereafter drying the fibers, said shaping, coagulating and regenerating being effected by extruding the viscose mixture through a spinnerette into a spinning bath comprising sulfuric acid, sodium sulfate and zinc sulfate, said polyvinylpyrrolidone being present in amount such as to increase the water-holding capacity of said fibers.