Patent ID: 6372087
Filing Date: 2002-04-16
Classification: D21H,Y10T

Abstract:
An improved homogeneous, high-softness, high-bulk cellulosic one-ply bathroom tissue product having low sidedness, a serpentine configuration and a basis weight of at least about 12.5 lbs./3000 sq. ft. ream, said single-ply absorbent paper comprising a wet laid web of cellulosic fibers, the improvement comprising:(a) at least 20 percent by weight of the fibers in the web having a coarseness exceeding 23 mg/100 m and at least about 20 percent by weight of the fibers in the web having a coarseness of less than about 12 mg/100 m and the weight average coarseness to length ratio of the fibers in the web being less than about 8.5 mg/100 m/mm; (b) said single-ply absorbent paper, having been formed by conventional wet pressing of a cellulosic web, adhering of said web to a Yankee dryer and creping of the web from the Yankee dryer, said absorbent paper including a temporary wet strength agent comprising an organic moiety, and nitrogenous softener agent, said one-ply bathroom tissue having a specific total tensile strength of between 40 and 200 grams per 3 inches per pound of basis weight per 3000 square foot ream, a cross direction specific wet tensile strength of between 2.75 and 20.0 grams per 3 inches per pound per 3000 square foot ream, a ratio of MD tensile to CD tensile of between 1.25 and 2.75, a specific geometric mean tensile stiffness of between 0.5 and 3.2 grams per inch per percent strain per pound of basis weight per 3000 square foot ream, a friction deviation of less than 0.250, and a sidedness parameter of less than 0.30, and (c) the cationic nitrogenous softener having a melting range of about 0Â° C. to 40Â° C., wherein the softener comprises an imidazoline moiety formulated with organic compounds selected from the group consisting of aliphatic polyols, aliphatic diols, alkoxylated aliphatic polyols, alkoxylated aliphatic diols, and mixtures of these compounds.