Method for increasing filler retention of cellulosic fiber sheets
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United States of America Patent
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Issued Date -
Jul 24, 2003
app pub date -
Dec 20, 2002
filing date -
Mar 19, 1999
priority date (Note) -
Abandoned
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Abstract
A method for increasing filler retention of cellulosic fiber sheets is disclosed. In the method, cellulosic fibers with increased anionic sites are treated with either positively charged filler particles and/or amphoteric filler particles or a cationic retention aid and negatively charged filler particles and/or amphoteric filler particles. Cellulosic fiber sheets with retained filler particles are also disclosed.
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