| 摘要 |
PROBLEM TO BE SOLVED: To obtain desired appearance and print quality.SOLUTION: Methods for improving one or more surface properties of a sheet of paper or paperboard comprises: (a) coating at least one side of the sheet of paper or paperboard with a dispersion having a cationic zeta potential formed by combining (1) a mixture containing one or more anionic pigments with (2) one or more polyamine-epihalohydrin cationic wet strength resins at a coating weight of from about 0.1 g/m2 to about 20 g/m2; (b) drying the coated sheet of paper or paperboard; (c) applying a functional barrier top coating that resists one or more of liquid water, water vapor, gas permeability, oil and grease, slip, and static, or an anionic latex-based pigment coating that imparts improved opacity, brightness, or printability. The invention also includes the dispersions as well as paper or paperboard coated with the dispersion. |
