Method of making cellulose yarn solution
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United States of America Patent
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Nov 8, 1994
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N/A
app pub date -
Oct 29, 1993
filing date -
May 27, 1992
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Expired
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Abstract
An improved method of making cellulose yarn solution made up of solvents such as N-methylmorpholine-N-oxide and recovered caprolactam involves cutting a wood pulp sheet into small pieces, which are subsequently added into a kneading machine having therein water solution containing 63-67% of N-methylmorpholine-N-oxide and recovered caprolactam. The kneading machine is subjected to a three-stage heat treatment to produce the cellulose yarn solution at low cost and best qualities.
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