Process for producing strong and soft tissue and towel products

Abstract

A sanitary tissue product may comprise a first layer comprising eucalyptus fibers and a second layer comprising eucalyptus fibers and softwood fibers. The eucalyptus fibers in the second layer may have at least 24% more vessel elements than the eucalyptus fibers in the first layer.

What is claimed is: 
     
         1 . A sanitary tissue product, comprising:
 a first layer comprising eucalyptus fibers;   a second layer comprising eucalyptus fibers and softwood fibers; and   wherein the eucalyptus fibers in the second layer have at least 24% more vessel elements than the eucalyptus fibers in the first layer.   
     
     
         2 . The sanitary tissue product of  claim 1 , further comprising a third layer comprising eucalyptus fibers. 
     
     
         3 . The sanitary tissue product of  claim 2 , wherein the eucalyptus fibers in the first layer and the third layer have about the same percentage of vessel elements. 
     
     
         4 . The sanitary tissue product of  claim 1 , wherein the first layer is a consumer-facing layer. 
     
     
         5 . The sanitary tissue product of  claim 1 , wherein the second layer is a non-consumer-facing layer. 
     
     
         6 . The sanitary tissue product of  claim 1 , wherein a first ply comprises the first layer. 
     
     
         7 . The sanitary tissue product of  claim 1 , wherein a second ply comprises the second layer. 
     
     
         8 . The sanitary tissue product of  claim 1 , wherein a first ply comprises the first and second layers. 
     
     
         9 . The sanitary tissue product of  claim 1 , wherein the sanitary tissue product is toilet paper. 
     
     
         10 . The sanitary tissue product of  claim 1 , wherein the softwood fibers are NSK. 
     
     
         11 . The sanitary tissue product of  claim 1 , further comprising cellulosic fibers selected from the group consisting of cotton linters, rayon, lyocell, trichomes, seed hairs, bagasse, grasses, grains, and combinations thereof. 
     
     
         12 . A sanitary tissue product, comprising:
 a first layer comprising eucalyptus fibers;   a second layer comprising eucalyptus fibers and softwood fibers;   wherein the eucalyptus fibers in the second layer have at least 24% more vessel elements than the eucalyptus fibers in the first layer;   a third layer comprising eucalyptus fibers and softwood fibers;   a fourth layer comprising eucalyptus fibers; and   wherein the eucalyptus fibers in the third layer have at least 24% more vessel elements than the eucalyptus fibers in the fourth layer.   
     
     
         13 . The sanitary tissue product of  claim 12 , wherein a first ply comprises the first and second layers. 
     
     
         14 . The sanitary tissue product of  claim 13 , wherein a second ply comprises the third and fourth layers, and wherein the first and second plies are joined together. 
     
     
         15 . The sanitary tissue product of  claim 14 , wherein the first and fourth layers are consumer-facing layers. 
     
     
         16 . The sanitary tissue product of  claim 15 , wherein the second and third layers are non-consumer-facing layers. 
     
     
         17 . The sanitary tissue product of  claim 12 , wherein the eucalyptus fibers in the first and fourth layers have about the same percentage of vessel elements, and wherein the eucalyptus fibers in the second and third layers have about the same percentage of vessel elements. 
     
     
         18 . The sanitary tissue product of  claim 12 , wherein the sanitary tissue product is toilet paper. 
     
     
         19 . The sanitary tissue product of  claim 12 , wherein the softwood fibers are NSK. 
     
     
         20 . The sanitary tissue product of  claim 12 , further comprising cellulosic fibers selected from the group consisting of cotton linters, rayon, lyocell, trichomes, seed hairs, bagasse, and combinations thereof. 
     
     
         21 . The sanitary tissue product of  claim 12 , further comprising cellulosic fibers selected from the group consisting of grasses, grains, and combinations thereof.