Process for producing viscose rayon filament yarn
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United States of America Patent
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-
May 17, 1983
Grant Date -
N/A
app pub date -
Sep 17, 1980
filing date -
Sep 27, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A viscose rayon filament yarn excellent in resistance to deterioration with time and uniform in boiling water shrinkage factor in the longitudinal direction of yarn which has been produced by a continuous spinning process characterized by spinning a viscose having a sulfur content of sulfur oxides and polysulfides of 0.55% by weight or less based on the weight of cellulose, then allowing the yarn to stand for a time period defined by the following equation and then washing it with water and drying it: 7.5D.sub.M +15.ltoreq.T.sub.s .ltoreq.10D.sub.M +25 wherein D.sub.M is denier of the monofilament constituting the rayon filament yarn to be spun and T.sub.s, expressed in second, is the standing time of the viscose filament spun.
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