Method for producing paper with a high substance weight
AssigneeBASF SE
InventorsOliver Koch, Rainer Blum, Ron Van Dijk
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Abstract
A process for producing paper of high basis weight by draining a paper pulp on a wire in the presence of a combination of at least two polymers as a retention and drainage aid system, forming sheets, and drying the sheets, which comprises forming the sheets in the absence of finely divided inorganic flocculants and using as retention and drainage aids (a) at least one amino-containing polymer and (b) at least one branched cationic polyacrylamide.
Claims13
A process for producing paper of high basis weight by draining a paper pulp on a wire in the presence of a combination of at least two polymers as a retention and drainage aid system, forming sheets, and drying the sheets, which comprises forming the sheets in the absence of finely divided inorganic flocculants and in the presence of retention and drainage aids comprising (a) at least one amino-containing polymer and (b) at least one branched cationic polyacrylamide.
A process for producing paper sheets of high basis weight comprising forming said paper sheets in the presence of retention and drainage aids consisting of (a) at least one amino-containing polymer and (b) at least one branched cationic polyacrylamide.
Dependencies are inferred from the claim text.