| 摘要 |
<p>A method for producing paper that reduces the load on drainage and that obtains cardboard and paper having a fixed quality is provided. A slime control agent and a polymer having a cationic functional group are added to papermaking-step water containing starch. At that time, as the polymer containing a cationic functional group, a compound is used that is a polymer of solely a monomer represented by chemical formula (A) or a copolymer of said monomer and acrylamide or styrene, contains 20-100 mol% of a monomer unit derived from the monomer represented by chemical formula (A), is at least one of a diallyl dimethyl ammonium halide polymer, a polyethylenimine, or an epichlorohydrin polymer, and has an intrinsic viscosity (?) at 25°C in a 1 N sodium chloride solution of 0.05-5 dl/g. (In the formula: R1 represents a hydrogen atom or a methyl group; R2 and R3 each represent a C1-4 alkyl group; R4 represents a hydrogen atom, a C1-4 alkyl group, or a benzyl group; Y represents O or NH; n represents 2-5; and Z- represents a halogen ion, a sulfate ion, a phosphate ion, a borate ion or an organic acid anion.)</p> |
