| 摘要 |
Methods of improving dewatering efficiency, increasing sheet wet web strength, increasing sheet wet strength, and enhancing filler retention in a papermaking process are disclosed. The methods improve the efficiency of drainage aids, wet web strength aids, and/or wet strength aids by coating at least some of the filler particles with a material that prevents the filler materials form adhering to a those additives. |
| 主权项 |
1. A method of papermaking, comprising:
treating filler particles in a container with a composition of matter, in the absence of a cellulose fiber stock, by contacting the filler particles in the container with a rotating admixing apparatus having a distribution head, wherein the filler particles are selected from precipitated calcium carbonate, ground calcium carbonate, and any combination thereof; combining the treated filler particles with the cellulose fiber stock thereby forming a combination, wherein the cellulose fiber stock comprises a plurality of cellulose fibers and water; treating at least one of the cellulose fiber stock and the combination with a member selected from the group consisting of a wet strength aid, a wet web strength additive, a drainage additive, and any combination thereof; and forming a paper mat; wherein the distribution head is rotated by a drive, arranged in the container containing the filler particles, and associated with a rotational plane, the distribution head having, along a circumference thereof, which surrounds a rotational axis, distributed outlets from which the composition is passed into the container, the outlets comprising openings and the container comprising mixing blades extending transverse to the rotational plane and having a length equal to at least half of an inner diameter of the container. |
