Retention and drainage aid for papermaking
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United States of America Patent
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Jan 17, 1989
Grant Date -
N/A
app pub date -
Mar 8, 1988
filing date -
Mar 8, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A papermaking stock comprising cellulose fibers in an aqueous medium at a concentration of preferably about 50% by weight of the total solids in the stock including a retention and dewatering aid comprising a two component combination of an anionic polyacrylamide and a cationic colloidal silicia sol. The stock exhibits enhanced resistance to shear forces during the papermaking process. A papermaking process is also described.
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