Patent ID: 6918995

Claim:
A process for the production of paper from an aqueous suspension containing cellulosic fibers, and optional fillers, which comprises separately adding to the suspension (i) a cationic organic polymer having one or more aromatic groups and having at least one quaternary ammonium group, the cationic organic polymer being a cationic polysaccharide and being added in an amount of at least 0.001% by weight based on dry cellulosic fibers and optional fillers; and (ii) an anionic polymer having one or more aromatic groups, the anionic polymer being added in an amount of at least 0.001% by weight based on dry cellulosic fibers and optional fillers, and the anionic polymer being a formaldehyde-naphthalene sulfonate condensation polymer; and forming and draining the obtained suspension on a wire.