PAPER MANUFACTURE PROCESS Russian patent published in 2002 - IPC

FIELD: paper-and-pulp industry. SUBSTANCE: dehydration and retention agents are added to suspension containing cellulose fibers and optionally fillers, said dehydration and retention agent being cationic organic polymer and finely broken material. Suspension is then formed and dehydrated on screen. Cationic organic polymer has nonaromatic hydrophobic group, in particular C3-C12-alkyl group. Invention also provides cationic vinyl addition polymer including at least one polymerized noncationic monomer containing nonaromatic hydrophobic group and at least one cationic monomer. EFFECT: enhanced dehydration and retention. 21 cl, 6 tbl, 7 ex