Strength additive system and method for manufacturing a web comprising cellulosic fibres
AssigneeKemira Oyj
InventorsLogan Jackson, Chen Lu, Jenna Rabideau
Life of this patent
Estimating the term…
Abstract
A strength additive system for manufacturing paper, board, tissue or the like includes preferably as separate components, a cationic strength agent, such as a cationic polymer with aldehyde functional groups, and an anionic copolymer obtained by polymerization of a reaction mixture including (meth)acrylamide and anionic monomers, the standard viscosity of the obtained copolymer being in a range of 1.5-5.0 mPas. A method for manufacturing of a paper, board, tissue or the like is further disclosed.
Claims18
A strength additive composition for manufacturing paper, board or tissue, the composition comprising as separate components:
- a cationic strength agent being a cationic polymer with aldehyde functional groups and having a charge density of 0.1-5.5 meq/g;
- and
- an anionic copolymer obtained by polymerization of a reaction mixture comprising (meth)acrylamide and anionic monomers, the standard viscosity of the obtained copolymer being in a range of 1.8-3.0 mPas.
Dependencies are inferred from the claim text.