Soft tissue having reduced hydrogen bonding
View Patent ↗The present invention provides a modified cellulosic fiber having reduced hydrogen bonding capabilities. The modified fiber formed in accordance with the present invention may be useful in the production of tissue products having improved bulk and softness. More importantly, the modified fiber is adaptable to current tissue making processes and may be incorporated into a tissue product to improve bulk and softness without an unsatisfactory reduction in tensile.
1. A tissue web comprising unmodified and modified wood pulp fibers, the modified wood pulp fibers consisting of wood pulp fibers reacted only with a reagent consisting essentially of a water soluble cyanuric halide having the general Formula (I):
where R 1 equals F, Cl, Br, or I and R 2 equals (CH 2 ) n —OH (n=1-3), (CH 2 ) n —COOH (n=1-3), C 6 H 5 —COOH, or HSO 3 X where X equals (CH 2 ) n (n=1-3) or C6H4, the modified wood pulp fibers having a nitrogen content greater than about 0.2 weight percent, the tissue web having a basis weight from about 10 to about 60 gsm and a sheet bulk greater than about 10 cc/g.
2. The tissue web of claim 1 wherein the amount of modified wood pulp fiber is from about 5 to about 80 percent of the weight of the web.
3. The tissue web of claim 1 wherein the modified wood pulp fiber comprises a softwood or a hardwood kraft fiber.
4. The tissue web of claim 1 wherein the nitrogen content of the web is from about 0.2 to about 0.5 weight percent.
5. The tissue web of claim 4 wherein the web is a creped tissue web having a sheet bulk from about 10 to about 15 cc/g and a basis weight from about 10 to about 20 gsm.
6. The tissue web of claim 4 wherein the web is an uncreped tissue web having a sheet bulk from about 12 to about 20 cc/g and a basis weight from about 20 to about 40 gsm.