Sanitary tissue products comprising nanofilaments
AssigneeMercer International Inc.
InventorTobias Ziegenbein
Life of this patent
Estimating the term…
Abstract
A soft sanitary tissue paper web having from about 2% to about 56.5% by weight of the soft sanitary tissue paper web of a softwood pulp fiber mixture, and from about 43.5% to about 99.9% by weight of the dry fiber basis of the soft sanitary tissue paper web of a hardwood pulp fiber mixture is disclosed. The softwood pulp fiber mixture has: 1) from about 0% to about 56.4% by weight of the dry fiber basis of softwood pulp fiber; 2) from about 0.05% to about 3.0% by weight of the dry fiber basis of strengthening additive. The hardwood pulp fiber mixture comprises: 1) from about 43.4% to about 99.4% by weight of the dry fiber basis of hardwood pulp fibers; and, 2) from about 0.05% to about 20.0% by weight of the dry fiber basis of cellulose nano-filaments.
Claims20
A soft sanitary tissue paper web comprising:
- a) from about 2% to about 56.5% by weight of said soft sanitary tissue paper web of a softwood pulp fiber mixture, said softwood pulp fiber mixture comprising:
- 1) from about 0% to about 56.4% by weight of the dry fiber basis of said soft sanitary tissue paper web of softwood pulp fiber;
- 2) from about 0.05% to about 3.0% by weight of the dry fiber basis of said soft sanitary tissue paper web of strengthening additive;
- and,
- b) from about 43.5% to about 99.9% by weight of the dry fiber basis of said soft sanitary tissue paper web of a hardwood pulp fiber mixture, said hardwood pulp fiber mixture comprising:
- 1) from about 43.4% to about 99.4% by weight of the dry fiber basis of said soft sanitary tissue paper web of hardwood pulp fibers;
- and,
- 2) from about 0.05% to about 20.0% by weight of the dry fiber basis of said soft sanitary tissue paper web of cellulose nano-filaments.
A soft sanitary tissue paper web comprising:
- a) from about 2% to about 56.5% by weight of said soft sanitary tissue paper web of a softwood pulp fiber mixture, said softwood pulp fiber mixture comprising:
- 1) from about 0% to about 56.4% by weight of said soft sanitary tissue paper web of softwood pulp fiber;
- and,
- 2) from about 0.05% to about 3.0% by weight of said soft sanitary tissue paper web of cationic strengthening polymer;
- b) from about 43.5% to about 99.9% by weight of said soft sanitary tissue paper web of a hardwood pulp fiber mixture, said hardwood pulp fiber mixture comprising hardwood pulp fibers;
- and,
- c) from about 0.05% to about 20.0% by weight of the dry fiber basis of said soft sanitary tissue paper web of cellulose nano-filaments.
A soft sanitary tissue paper web comprising:
- (a) from about 2% to about 56.5% by weight of by weight of the dry fiber basis of said soft sanitary tissue paper web of a softwood pulp fiber mixture, said softwood pulp fiber mixture comprising:
- 1) from about 0% to about 56.4% by weight of the dry fiber basis of said soft sanitary tissue paper web of softwood pulp fiber;
- and,
- 2) from about 0.05% to about 3.0% by weight of the dry fiber basis of said soft sanitary tissue paper web of strengthening additive;
- and,
- b) from about 43.5% to about 99.9% by weight of the by weight of the dry fiber basis of said soft sanitary tissue paper web of a hardwood pulp fiber mixture, said hardwood pulp fiber mixture comprising:
- 1) from about 43.4% to about 99.4% by weight of the dry fiber basis of said soft sanitary tissue paper web of hardwood pulp fibers;
- and
- 2) from about 0.05% to about 20.0% by weight of the by weight of the dry fiber basis of said soft sanitary tissue paper web of a blend of cellulose micro-filaments and cellulose nano-filaments, said blend of cellulose micro-filaments and cellulose nano-filaments comprising:
- A) at least about 50% by weight of said blend of cellulose micro-filaments and cellulose nano-filaments of cellulose micro-filaments and cellulose nano-filaments;
- B) at least about 10% by weight of said blend of cellulose micro-filaments and cellulose nano-filaments of intact fibrillated fibers;
- and,
- C) at least about 5% by weight of said blend of cellulose micro-filaments and cellulose nano-filaments of cellulosic fines.
Dependencies are inferred from the claim text.