Process for making tissue or towel products comprising nanofilaments

A process for making a soft sanitary tissue paper web comprising the steps of:

• (a) providing a papermaking furnish comprising:
• i) from about 2% to about 56.5% by weight of the dry fiber basis of the soft sanitary tissue paper web of a softwood pulp fiber mixture comprising:
• u) from greater than about 0% to about 56.4% by weight of the dry fiber basis of the soft sanitary tissue paper web of softwood pulp fiber,
• wherein the softwood pulp fiber is optionally refined before being added to the mixture;
• and,
• v) from about 0.05% to about 3.0% by weight of the dry fiber basis of the soft sanitary tissue paper web of strengthening additive;
• and,
• ii) 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;
• w) from about 43.4% to about 99.4% by weight of the dry fiber basis of the soft sanitary tissue paper web of hardwood pulp fibers;
• and,
• x) from about 0.05% to about 20.0% by weight of the dry fiber basis of the soft sanitary tissue paper web of cellulose nanofilaments;
• and,
• iii) optionally up to about 20% by weight of the dry fiber basis of the soft sanitary tissue paper web of a fibrillated manmade cellulose;
• and,
• iv) optionally up to about 20% by weight of the dry fiber basis of the soft sanitary tissue paper web of non-wood natural fibers;
• and,
• v) optionally up to about 20% by weight of the dry fiber basis of the soft sanitary tissue paper web of non-cellulosic fibers;
• and,
• (b) forming a wet fibrous web having a differential density from said paper making furnish;
• and,
• (c) drying said differential density wet fibrous web until said web contains not more than about 10% by weight moisture to form the soft sanitary tissue paper web.

A process for making an absorbent towel paper web comprising the steps of:

• (a) providing a papermaking furnish comprising:
• i) from about 45% to about 90% by weight of the dry fiber basis of the absorbent towel paper web of a softwood pulp fiber mixture comprising:
• u) from about 20.0% to about 89.9% by weight of the dry fiber basis of the absorbent towel paper web of softwood pulp fiber,
• wherein the softwood pulp fiber is optionally refined before being added to the mixture;
• and,
• v) from about 0.05% to about 5.0% by weight of the dry fiber basis of the absorbent towel paper web of strengthening additive;
• and,
• ii) from about 10% to about 55% by weight of the dry fiber basis of the absorbent towel paper web of a hardwood pulp fiber mixture comprising
• y) from about 9.9% to about 49.9% by weight of the dry fiber basis of the absorbent towel paper web of a hardwood pulp fiber;
• and,
• z) from about 0.05% to about 20.0% by weight of the dry fiber basis of the absorbent towel paper web of a blend of micro- and nano-sized cellulose filaments, wherein the blend comprises:
• A) at least about 40% by weight of the blend of cellulose nanofilaments;
• B) at least about 20% by weight of the blend of intact fibrillated fibers;
• and,
• C) at least about 10% by weight of the blend of cellulosic fines;
• and,
• iii) optionally up to about 20% by weight of the dry fiber basis of the absorbent towel paper web of a fibrillated manmade cellulose;
• and,
• iv) optionally up to about 20% by weight of the dry fiber basis of the absorbent towel paper web of non-wood natural fibers;
• and,
• v) optionally up to about 20% by weight of the dry fiber basis of the absorbent towel paper web of non-cellulosic fibers;
• and,
• (b) forming a wet fibrous web having a differential destiny from said paper making furnish;
• and,
• (c) drying said differential destiny web fibrous web until said dry differential density web contains not more than about 10% by weight moisture to form the absorbent towel paper web.

A process for making a soft sanitary tissue paper web comprising the steps of:

• (a) providing a papermaking furnish comprising:
• i) from about 2% to about 56.5% by weight of by weight of the dry fiber basis of the soft sanitary tissue paper web of a softwood pulp fiber mixture comprising:
• u) from greater than about 0% to about 56.4% by weight of the dry fiber basis of the soft sanitary tissue paper web of softwood pulp fiber,
• wherein the softwood pulp fiber is optionally refined before being added to the mixture;
• and,
• w) from about 0.05% to about 3.0% by weight of the dry fiber basis of the soft sanitary tissue paper web of strengthening additive;
• and,
• ii) from about 43.5% to about 99.9% by weight of the by weight of the dry fiber basis of the soft sanitary tissue paper web of a hardwood pulp fiber mixture comprising:
• y) from about 43.4% to about 99.4% by weight of the dry fiber basis of the soft sanitary tissue paper web of hardwood pulp fibers;
• and,
• z) from about 0.05% to about 20.0% by weight of the by weight of the dry fiber basis of the soft sanitary tissue paper web of a blend of micro- and nano-sized cellulose filaments, wherein the blend comprises:
• A) at least about 50% by weight of the blend of cellulose nanofilaments;
• B) at least about 20% by weight of the blend of intact fibrilated fibers;
• and,
• C) at least about 20% by weight of the blend of cellulosic fines;
• and,
• iii) optionally up to about 20% by weight of the dry fiber basis of the soft sanitary tissue paper web of a fibrillated manmade cellulose;
• and
• iv) optionally up to about 20% by weight of the dry fiber basis of the soft sanitary tissue paper web of non-wood natural fibers;
• v) optionally up to about 20% by weight of the dry fiber basis of the soft sanitary tissue paper web of non-cellulosic fibers;
• and
• (b) forming a wet fibrous web having a differential density from said paper making furnish;
• and,
• (c) drying said differential density wet fibrous web until said dry differential density web contains not more than about 10% by weight moisture to form the soft sanitary tissue paper web.

A process for making an absorbent towel paper web comprising the steps of:

• (a) providing a papermaking furnish comprising:
• i) from about 45% to about 90.0% by weight of the papermaking furnish of a soft wood pulp fiber mixture comprising:
• u) from about 20.0% to about 89.9% by weight of the papermaking furnish of soft wood pulp fiber;
• wherein the soft wood pulp fiber is optionally refined before being added to the mixture;
• and,
• v) from about 0.05% to about 5.0% by weight of the papermaking furnish of strengthening additive;
• and,
• ii) from about 10.0% to about 55.0% by weight of the papermaking furnish of a hardwood pulp fiber mixture comprising hardwood pulp fibers;
• and,
• iii) from about 0.05% to about 20.0% by weight of the dry fiber basis of the papermaking furnish of cellulose nanofilaments added to the mixture of soft wood pulp and hardwood pulp;
• and,
• iii) optionally up to about 20% by weight of the dry fiber basis of the papermaking furnish of a fibrillated manmade cellulose;
• and,
• iv) optionally up to about 20% by weight of the dry fiber basis of the papermaking furnish of non-wood natural fibers;
• v) optionally up to about 20% by weight of the dry fiber basis of the papermaking furnish of non-cellulosic fibers;
• and,
• (b) forming a wet fibrous web having a differential density from said paper making furnish;
• and,
• (c) drying said differential density wet fibrous web until said dry differential density web contains not more than about 6% by weight moisture to form the absorbent towel paper web.

A process for making a soft sanitary tissue paper web comprising the steps of:

• (a) providing a papermaking furnish comprising:
• i) from about 2% to about 56.5% by weight of the papermaking furnish of a soft wood pulp fiber mixture comprising:
• u) from greater than about 0% to about 56.4% by weight of the papermaking furnish of soft wood pulp fiber,
• wherein the soft wood pulp fiber is optionally refined before being added to the mixture;
• v) from about 0.05% to about 3.0% by weight of the papermaking furnish of cationic strengthening polymer,
• ii) from about 43.5% to about 99.9% by weight of the papermaking furnish of a hard wood pulp fiber mixture comprising hardwood pulp fibers;
• and,
• iii) from about 0.05% to about 20.0% by weight of the dry fiber basis of the papermaking furnish web of cellulose nanofilaments added to the mixture of soft wood pulp fiber and hardwood pulp fiber;
• and,
• iii) optionally up to about 20% by weight of the dry fiber basis of the papermaking furnish of a fibrillated manmade cellulose;
• and,
• iv) optionally up to about 20% by weight of the dry fiber basis of the papermaking furnish of non-wood natural fibers;
• v) optionally up to about 20% by weight of the dry fiber basis of the papermaking furnish of non-cellulosic fibers;
• and,
• (b) forming a wet fibrous web having a differential density from said paper making furnish;
• (c) drying said differential density wet fibrous web until said dry differential density web contains not more than about 6% by weight moisture to form the soft sanitary tissue paper web.