Hardwood pulp fiber-containing structures and methods for making same

Abstract

Hardwood pulp fiber-containing structures, more particularly to eucalyptus pulp fiber-containing fibrous structures that may exhibit improved fiber densification and/or improved softness compared to known hardwood pulp fiber-containing fibrous structures are provided.

What is claimed is: 
     
         1 . A fibrous structure comprising about 5% or greater by weight of a eucalyptus pulp fiber that exhibits a Kajaani fiber width of less than 14.15 μm. 
     
     
         2 . The fibrous structure according to  claim 1  wherein the fibrous structure comprises greater than 10% by weight of the eucalyptus pulp fiber. 
     
     
         3 . The fibrous structure according to  claim 1  wherein the fibrous structure comprises greater than 5% to about 50% by weight of the eucalyptus pulp fiber. 
     
     
         4 . The fibrous structure according to  claim 1  wherein the fibrous structure comprises greater than 50% by weight of the eucalyptus pulp fiber. 
     
     
         5 . The fibrous structure according to  claim 1  wherein the fibrous structure comprises greater than 50% to about 100% by weight of the eucalyptus pulp fiber. 
     
     
         6 . The fibrous structure according to  claim 1  wherein the eucalyptus pulp fiber exhibits a Kajaani fiber width of less than 14.10 μm. 
     
     
         7 . The fibrous structure according to  claim 1  wherein the eucalyptus pulp fiber exhibits a Kajaani fibers/gram of greater than 20.5 millions of fibers/gram. 
     
     
         8 . The fibrous structure according to  claim 1  wherein the fibrous structure further comprises an additive selected from the group consisting of: permanent wet strength additives, temporary wet strength additives, softening additives, starch, clay, dry strength resins, wetting agents, lint resisting agents, absorbency-enhancing agents, immobilizing agents, lotion compositions, antiviral agents, antibacterial agents, polyol polyesters, antimigration agents, polyhydroxy plasticizers, and mixtures thereof. 
     
     
         9 . The fibrous structure according to  claim 8  wherein the softening additives comprise a silicone. 
     
     
         10 . The fibrous structure according to  claim 8  wherein the softening additives comprise a quaternary ammonium compound. 
     
     
         11 . The fibrous structure according to  claim 1  wherein the fibrous structure comprises a through-air-dried fibrous structure. 
     
     
         12 . The fibrous structure according to  claim 1  wherein the fibrous structure comprises a creped fibrous structure. 
     
     
         13 . The fibrous structure according to  claim 1  wherein the fibrous structure comprises an uncreped fibrous structure. 
     
     
         14 . The fibrous structure according to  claim 1  wherein the fibrous structure exhibits a basis weight of greater than 10 gsm to about 120 gsm. 
     
     
         15 . The fibrous structure according to  claim 1  wherein the fibrous structure further comprises other hardwood pulp fibers that exhibit Kajaani fiber widths of 14.15 μm or greater. 
     
     
         16 . The fibrous structure according to  claim 1  wherein the fibrous structure further comprises softwood pulp fibers. 
     
     
         17 . The fibrous structure according to  claim 16  wherein the softwood pulp fibers are selected from the group consisting of: Southern Softwood Kraft, Tropical Softwood Kraft and Northern Softwood Kraft, Tropical Softwood Kraft, and mixtures thereof. 
     
     
         18 . A single- or multi-ply sanitary tissue product comprising a fibrous structure according to  claim 1 . 
     
     
         19 . The sanitary tissue product according to  claim 18  wherein the sanitary tissue product is in roll form. 
     
     
         20 . A hardwood pulp fiber composition comprising:
 a. 20% or greater by weight of eucalyptus pulp fibers that exhibit a Kajaani fiber width of less than 14.15 μm; and   b. 80% or less by weight of eucalyptus pulp fibers that exhibit a Kajaani fiber width of 14.15 μm or greater.   
     
     
         21 . The hardwood pulp fiber composition according to  claim 20  wherein the hardwood pulp fiber composition comprises 30% or greater by weight of eucalyptus pulp fibers that exhibit a Kajaani fiber width of less than 14.15 μm. 
     
     
         22 . The hardwood pulp fiber composition according to  claim 21  wherein the hardwood pulp fiber composition comprises 50% to about 100% by weight of eucalyptus pulp fibers that exhibit a Kajaani fiber width of less than 14.15 μm.