主权项 |
1. A method of increasing the bulk of a tissue web comprising the steps of reacting cellulosic fiber with a water soluble reagent selected from the group consisting of a cyanuric halide having the general Formula (I): where R1 equals F, Cl, Br, or I and R2 equals (CH2)n—OH (n=1-3), (CH2)n—COOH (n=1-3), C6H5—COOH, or HSO3X where X equals (CH2)n (n=1-3) or C6H4, and a vinyl sulfone having the general Formula (II): where R1 equals a hydrocarbon having from about 1 to about 5 carbon atoms and R2 equals CH3, HC═CH2, (CH2)n—CH3 (n=1-3), (CH2)n—COOH (n=1-3), C6H4—COOH, or C6H5; treating the cellulosic fiber with a caustic agent; washing the cellulosic fiber; and forming a tissue web from the cellulosic fiber, wherein the tissue web has a basis weight greater than about 10 grams per square meter (gsm) and a sheet bulk greater than about 5 cc/g. |