Method for increasing paper strength
AssigneeKemira Oyj
InventorsChen Lu, Scott Rosencrance, Danny Nguyen
Life of this patent
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Abstract
The present invention provides a method for increasing paper strength in papermaking process comprising adding to a pulp a composition comprising an anionic polyacrylamide (APAM) and a high charge cationic glyoxylated polyacrylamide (GPAM). The present invention also provides paper obtained with said method.
Claims14
A mixed composition comprising an anionic polyacrylamide (APAM), and a high charge cationic glyoxylated polyacrylamide (GPAM), wherein the high charge cationic glyoxylated polyacrylamide has a cationic charge density of over 0.4 meq/g, said mixed composition having being prepared on site for being added to a fibrous slurry or to a fibrous web in a papermaking process.
9-21. (canceled)
Dependencies are inferred from the claim text.