Filler for papermaking process
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United States of America Patent
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Oct 13, 2015
Grant Date -
Jul 21, 2005
app pub date -
Dec 21, 2004
filing date -
Dec 22, 2003
priority date (Note) -
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Abstract
The present invention relates to a filler comprising calcium salt and cellulose derivative having a degree of substitution of net ionic groups up to about 0.65, wherein the filler is substantially free from fibers or fibrils of cellulose or lignocellulose. The invention also relates to a filler comprising calcium salt and a cellulose derivative having a degree of substitution of net ionic groups up to about 0.65, wherein the cellulose derivative contains cationic groups.
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