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US 5,672,249 AGranted
Process for including a fine particulate filler into tissue paper using starch
AssigneeThe Procter & Gamble Company
InventorsKenneth Douglas Vinson, John Paul Erspamer, Charles William Neal, Jonathan Andrew Ficke, Jeffress Paul Halter
Life of this patent
Estimating the term…
Abstract
A process for incorporating a fine particulate filler such as kaolin clay into tissue paper is disclosed. The process results in strong, soft, and low dusting tissue paper webs useful in the manufacture of soft, absorbent sanitary products such as bath tissue, facial tissue, and absorbent towels.
Claims22
A process for incorporating a fine non-cellulosic particulate filler into a creped tissue paper, said process comprising the steps of:
- a) contacting an aqueous dispersion of a non-cellulosic particulate filler with an aqueous dispersion of starch,
- b) mixing the aqueous dispersion of starch-contacted filler with papermaking fibers forming an aqueous papermaking furnish comprising starch-contacted filler and papermaking fibers,
- c) contacting said aqueous papermaking furnish with a flocculant,
- d) forming an embryonic paper web from the aqueous papermaking furnish on foraminous papermaking clothing,
- e) removing water from said embryonic web to form a semi-dry papermaking web,
- f) adhering the semi-dry papermaking web to a Yankee dryer and drying said web to a substantially dry condition,
- g) creping the substantially dry web from the Yankee dryer by means of a flexible creping blade, thereby forming a creped tissue paper;
- wherein said particulate filler comprises from about 1% to about 50% of the total weight of said creped tissue paper, said particulate filler selected from the group consisting of clay, calcium carbonate, titanium dioxide, talc, aluminum silicate, calcium silicate, alumina trihydrate, activated carbon, calcium sulfate, glass microspheres, diatomaceous earth, and mixtures thereof;
- and
- wherein said starch comprises from about 0.01% to about 5% by weight based on the weight of said particulate filler.
7 more elements
A process for incorporating a fine non-cellulosic particulate filler into a multi-layered creped tissue paper, said process comprising the steps of:
- a) contacting an aqueous dispersion of a non-cellulosic particulate filler with an aqueous dispersion of starch,
- b) mixing the aqueous dispersion of starch-contacted filler with papermaking fibers, thereby forming a filler-containing aqueous papermaking furnish comprising starch-contacted filler and papermaking fibers,
- c) contacting said aqueous papermaking furnish with an aqueous dispersion of a flocculant,
- d) providing at least one additional papermaking furnish,
- e) directing said papermaking furnishes onto foraminous papermaking clothing;
- thereby forming an embryonic multi-layered paper web from the filler-containing aqueous papermaking furnish and the additional papermaking furnish in a manner to create a multi-layered paper web wherein at least one layer is formed from the filler-containing aqueous papermaking furnish and at least one layer is formed from said additional papermaking furnish,
- f) removing water from said multi-layered embryonic web to form a semi-dry multi-layered papermaking web,
- g) adhering the semi-dry multi-layered papermaking web to a Yankee dryer and drying said multi-layered web to a substantially dry condition,
- h) creping the substantially dry multi-layered web from the Yankee dryer by means of a flexible creping blade, thereby forming a multi-layered creped tissue paper,
- wherein said particulate filler comprises from about 1% to about 50% of the total weight of said creped tissue paper, said particulate filler selected from the group consisting of clay, calcium carbonate, titanium dioxide, talc, aluminum silicate, calcium silicate, alumina trihydrate, activated carbon, calcium sulfate, glass microspheres, diatomaceous earth, and mixtures thereof;
- and
- wherein said starch comprises from about 0.01% to about 5% by weight based on the weight of said particulate filler.
9 more elements
Dependencies are inferred from the claim text.