Method of refining woodchips or beating wood pulp with a selectively sulfonated chitosan
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United States of America Patent
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Oct 3, 1995
Issued Date -
N/A
app pub date -
Feb 15, 1994
filing date -
Dec 25, 1990
priority date (Note) -
Expired
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Abstract
A refining assisting agent comprising sulfonated chitosan has been provided. With the addition of the sulfonated chitosan according to the present invention, power needed in the refining can be remarkably reduced compared with that needed in the conventional refining. In addition, the refining assisting additive improves paper strength.
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