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US 10,458,068 B2Granted
Method for producing paper
AssigneeKemira Oyj
InventorsChen Lu, Junhua Chen, Clay Campbell, Scott Rosencrance, Jenna Sue Rabideau
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Abstract
A method for manufacturing paper is disclosed. A pulp slurry is produced, a paper sheet is formed from the slurry, an aldehyde functionalized polymer or polymers is added to the slurry before and/or after sheet formation, and a water soluble acid is added on the paper sheet.
Claims33
A method for manufacturing paper, comprising:
- producing a pulp slurry;
- forming a paper sheet from the pulp slurry including cellulose fibers;
- adding at least one aldehyde functionalized polymer to said pulp slurry or to the formed paper sheet, wherein the at least one aldehyde functionalized polymer covalently bonds to the cellulose fibers;
- and
- adding a water soluble acid having a relative acidity (RA) value greater than 0.05 g/kg dry paper onto the formed paper sheet.
2 more elements
Dependencies are inferred from the claim text.