FIELD: textile, paper.
SUBSTANCE: method relates to paper or cardboard production and can be used on pulp-and-paper industry. Part of paper pulp fiber is treated with a polymer at least within two stages. Paper pulp treated with the polymer is mixed with remaining non-treated paper pulp. The mixed paper pulp is dehydrated on a net conveyor for forming fibrous web.
EFFECT: increase of strength without negative effect upon paper or cardboard volume with decreasing quantity of adding polymers and enhancing economical efficiency of the process.
14 cl, 4 dwg, 2 ex
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