초록 ▼

A process for manufacturing paper and paperboard that includes the steps of preflocculating granular starch with an aqueous solution containing cellulosic fibers and a flocculant prior to the introduction of the preflocculated mixture to either the white water, thick stock or thin stock. By preflocc

A process for manufacturing paper and paperboard that includes the steps of preflocculating granular starch with an aqueous solution containing cellulosic fibers and a flocculant prior to the introduction of the preflocculated mixture to either the white water, thick stock or thin stock. By preflocculating the starch in the presence of cellulosic fibers, improved formation is provided without compromising retention of the starch in the formed mat and distribution of the starch in the Z-direction is improved which improves the strength properties of the paper and paperboard.

대표청구항 ▼

[ What is claimed:] [1.] A method of improving retention of granular starch in paper and paperboard production, the method comprising the following steps:mixing starch with an aqueous slurry containing cellulosic fibers to provide a starch/cellulosic fiber slurry, the aqueous slurry containing cellu

[ What is claimed:] [1.] A method of improving retention of granular starch in paper and paperboard production, the method comprising the following steps:mixing starch with an aqueous slurry containing cellulosic fibers to provide a starch/cellulosic fiber slurry, the aqueous slurry containing cellulosic fibers consisting of a split stream of recycled white water,mixing a flocculant with the starch/cellulosic fiber slurry to provide a preflocculated starch slurry,combining the preflocculated starch slurry with a papermaking furnish.