| abstract |
The present invention relates to a kind of methods for manufacturing paper or cardboard, including providing (a) mechanical pulp and (b) without wood pulp, (a) mechanical pulp and (b) without wood pulp are merged and form the mixing slurry for including mechanical pulp fiber of the gross dry weight no more than 20%, mixing slurry underflow as in is made to flow and merge underflow in this with dilution water and form low underflow, the low underflow drainage is formed by page by net or sieve, the latter is dried, wherein additional filler and cationic polymer are added in mechanical pulp. |