Fibrous-reinforced sheet

Details Fibrous-reinforced sheet Fibrous-reinforced sheet

D - Textiles, Paper

21

H

D21H 17/00 (2006.01) D21H 17/45 (2006.01) D21H 17/67 (2006.01) D21H 27/18 (2006.01) D21H 17/74 (2000.01)

Patent

CA 2128072

A process for forming a highly filled, fibrous-reinforced sheet in which the sheet is formed from an aqueous dispersion of solids which include fibers, filler, and binder and cationic flocculating agent by continuously feeding a stream of such aqueous dispersion onto a moving porous support surface, wherein the filler comprises at least about 50 wt.% of the solids portion of the dispersion, the improvement comprising the use in the aqueous dispersion of a filler consisting essentially of calcium carbonate and a cationic polymeric flocculant having a charge-density of at least about 2 equivalents of cationic nitrogen per kilogram of polymer, and a highly-filled calcium carbonate-containing sheet, and the use of carbon black to impart opacity to paper or sheet that has a white appearance.

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