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US 9,212,435 B2Granted
Pulp and fibrillated fiber composite
AssigneeWeyerhaeuser NRCompany
InventorsBrent A. Petersen, Andrew J. Dodd, Andre S. Hajnal, Noriko Suzuki
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Abstract
A cellulose pulp sheet is provided that is formed from never-dried kraft pulp and fibrillated fibers, such as lyocell. The pulp sheet provides several beneficial features as a result of both the use of fibrillated fibers and never-dried kraft pulp, particularly when the pulp sheet is used to form air-laid absorbent materials that include superabsorbent polymers.
Claims23
A wet-laid cellulose pulp sheet formed from:
- unfibrillated, never-dried kraft pulp;
- and
- fibrillatable fibers;
- wherein the pulp sheet is from 1-10 weight % fibrillatable fibers;
- and
- wherein the kraft pulp has fibers with an average length of from 2-3 mm.
3 more elements
A wet-laid cellulose pulp sheet formed from:
- unfibrillated, never-dried kraft pulp;
- and
- fibrillatable fibers;
- wherein the pulp sheet is from 1-10 weight % fibrillatable fibers, and has a density of 0.4 to 1.5 g/cc.
1 more element
A wet-laid cellulose pulp sheet formed from:
- unfibrillated, never-dried kraft pulp;
- and
- fibrillatable fibers;
- wherein the pulp sheet is from 1-10 weight % fibrillatable fibers, and
- wherein the pulp sheet contains no binder or filler.
2 more elements
Dependencies are inferred from the claim text.