Process for making a composition for conversion to lyocell fiber from an alkaline pulp having low average degree of polymerization values
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United States of America Patent
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Aug 1, 2006
Grant Date -
Apr 11, 2002
app pub date -
Oct 10, 2001
filing date -
Aug 23, 1996
priority date (Note) -
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Abstract
The present invention provides compositions, useful for making lyocell fibers, having a high hemicellulose content, a low copper number and including cellulose that has a low average degree of polymerization (D.P.) and a narrow molecular weight distribution. Further, the present invention provides processes for making compositions, useful for making lyocell fibers, by contacting an alkaline pulp having a high hemicellulose content of at least about 7% with an oxidant sufficient to reduce the average degree of polymerization to about 200 to 1100 without substantially reducing the hemicellulose content or increasing the copper number of the pulp.
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