Tissue having reduced hydrogen bonding

摘要

It has now been discovered that the sheet bulk of a tissue web may be increased, with little or no degradation in tensile strength, by forming the web with at least a portion of cellulosic fiber that has been reacted with a water soluble cellulose reactive agent such as a cyanuric halide or a vinyl sulfone and then reacting the fiber with monochloroacetic acid, or salts thereof, in the presence of a caustic.

主权项

1. A tissue product comprising at least one multi-layered tissue web having two outer fibrous layers and a middle fibrous layer disposed between the two outer fibrous layers, the two outer fibrous layers comprising unmodified cellulosic fibers and the middle fibrous layer comprising modified hardwood kraft pulp fibers having a nitrogen content from about 0.2 to about 3.0 weight percent and a degree of carboxymethylation from about 0.05 to about 0.45, wherein the modified hardwood kraft pulp fibers comprise at least about 5 percent of the total weight of the multi-layered web and the first and third layers are substantially free from modified hardwood kraft pulp fibers, the tissue product having a basis weight from about 10 to about 50 grams per square meter (gsm), a sheet bulk greater than about 10 cc/g and a Stiffness Index from about 8 to about 12.