Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – With crimping or crinkling of strands of filaments
Patent
1979-05-07
1981-04-21
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
With crimping or crinkling of strands of filaments
260 174CL, 264191, D01D 522, D01F 208
Patent
active
042632447
ABSTRACT:
A regenerated cellulose fiber containing an alloying polymer of acrylic acid or methacrylic acid, or a copolymer containing acrylic and methacrylic acid moieties or an alkali metal or ammonium salt thereof or other anionic alloying polymers or copolymer is prepared by a process wherein the alloying polymer is mixed with a viscose solution of known unreacted sodium hydroxide concentration, the sodium hydroxide concentration in the resulting mixture is increased to compensate for any loss in concentration due to neutralization and/or dilution effects by the addition of the alloying polymer to the viscose. Increasing the sodium hydroxide concentration greater than that required to restore the concentration to the original level has resulted in dramatic increases in absorbency. The resulting viscose solution is extruded into a spin bath in which the sulfuric acid concentration is reduced so that the resulting fibers will have at least 90% of the crimp of a fiber produced from the viscose solution without alloying polymer or copolymer.
REFERENCES:
patent: 3844287 (1974-10-01), Smith
patent: 4066584 (1978-01-01), Allen et al.
Allen Thomas C.
Denning David B.
Akzona Incorporated
Hall Jack H.
Woo Jay H.
Young Francis W.
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