abstract |
Process for the production of paper or cardboard with improved retention, in which a polyacrylamide and bentonite are added to the fibrous suspension, characterized in that the polyacrylamide is a linear amphoteric terpolymer, and is introduced into the suspension fibrous powder form dissolved, at a rate of 0.03 to 1.0 per thousand (0.03 to 1.0% o) by weight, of the dry weight of the fibrous suspension. |