Fibrous structures comprising non-naturally occurring hardwood pulp fibers

Abstract

Fibrous structures employing non-naturally occurring hardwood pulp fibers, and more particularly, sanitary tissue products employing non-naturally occurring hardwood pulp fibers and methods for making same are provided.

1 . A fibrous structure comprising a non-naturally occurring hardwood pulp fiber that exhibits a handsheet tensile strength as measured according to the Handsheet Tensile Strength Test Method described herein less than the handsheet tensile strength of the non-naturally occurring hardwood pulp fiber in its naturally occurring state. 
     
     
         2 . The fibrous structure according to  claim 1  wherein the non-naturally occurring hardwood pulp fiber is obtained from a naturally occurring hardwood pulp fiber. 
     
     
         3 . The fibrous structure according to  claim 2  wherein the naturally occurring hardwood pulp fiber is obtained from a fiber source selected from the group consisting of: Acacia, Eucalyptus, Maple, Oak, Aspen, Birch, Cottonwood, Alder, Ash, Cherry, Elm, Hickory, Poplar, Gum, Walnut, Locust, Sycamore, Beech, Catalpa, Sassafras, Gmelina, Albizia, Anthocephalus, Magnolia, and mixtures thereof. 
     
     
         4 . The fibrous structure according to  claim 2  wherein the naturally occurring hardwood pulp fiber is obtained from Eucalyptus. 
     
     
         5 . The fibrous structure according to  claim 2  wherein the naturally occurring hardwood pulp fiber comprises a tropical hardwood pulp fiber. 
     
     
         6 . The fibrous structure according to  claim 1  wherein the non-naturally occurring hardwood pulp fiber is obtained by enzymatically treating a naturally occurring hardwood pulp fiber. 
     
     
         7 . The fibrous structure according to  claim 6  wherein the non-naturally occurring hardwood pulp fiber is obtained by treating a naturally occurring hardwood pulp fiber with xylanase. 
     
     
         8 . The fibrous structure according to  claim 6  wherein the non-naturally occurring hardwood pulp fiber is obtained by treating a naturally occurring hardwood pulp fiber with an enzyme composition comprising xylanase and cellulase. 
     
     
         9 . The fibrous structure according to  claim 1  wherein the non-naturally occurring hardwood pulp fiber exhibits a PFR of 7.4 or less. 
     
     
         10 . A single- or multi-ply sanitary tissue product comprising one or more fibrous structures according to  claim 1 . 
     
     
         11 . A sanitary tissue product comprising a non-naturally occurring hardwood pulp fiber that exhibits a handsheet tensile strength as measured according to the Handsheet Tensile Strength Test Method described herein less than the handsheet tensile strength of the non-naturally occurring hardwood pulp fiber in its naturally occurring state, wherein the sanitary tissue product exhibits a greater wet burst strength as measured according to the Wet Burst Strength Test Method described herein and/or a greater initial total wet tensile as measured by the Initial Total Wet Tensile Test Method described herein than a sanitary tissue product that comprises the non-naturally occurring hardwood pulp fiber in its naturally occurring state. 
     
     
         12 . The sanitary tissue product according to  claim 11  wherein the non-naturally occurring hardwood pulp fiber is obtained from a naturally occurring hardwood pulp fiber. 
     
     
         13 . The sanitary tissue product according to  claim 12  wherein the naturally occurring hardwood pulp fiber is obtained from a fiber source selected from the group consisting of: Acacia, Eucalyptus, Maple, Oak, Aspen, Birch, Cottonwood, Alder, Ash, Cherry, Elm, Hickory, Poplar, Gum, Walnut, Locust, Sycamore, Beech, Catalpa, Sassafras, Gmelina, Albizia, Anthocephalus, Magnolia, and mixtures thereof. 
     
     
         14 . The sanitary tissue product according to  claim 12  wherein the naturally occurring hardwood pulp fiber is obtained from Eucalyptus. 
     
     
         15 . The sanitary tissue product according to  claim 12  wherein the naturally occurring hardwood pulp fiber comprises a tropical hardwood pulp fiber. 
     
     
         16 . The sanitary tissue product according to  claim 11  wherein the non-naturally occurring hardwood pulp fiber is obtained by enzymatically treating a naturally occurring hardwood pulp fiber. 
     
     
         17 . The sanitary tissue product according to  claim 16  wherein the non-naturally occurring hardwood pulp fiber is obtained by treating a naturally occurring hardwood pulp fiber with xylanase. 
     
     
         18 . The sanitary tissue product according to  claim 16  wherein the non-naturally occurring hardwood pulp fiber is obtained by treating a naturally occurring hardwood pulp fiber with an enzyme composition comprising xylanase and cellulase. 
     
     
         19 . The sanitary tissue product according to  claim 11  wherein the non-naturally occurring hardwood pulp fiber exhibits a PFR of 7.4 or less. 
     
     
         20 . A method for making a fibrous structure comprising the steps of:
 a. providing a fibrous composition comprising a non-naturally occurring hardwood pulp fiber that exhibits a handsheet tensile strength as measured according to the Handsheet Tensile Strength Test Method described herein less than the handsheet tensile strength of the non-naturally occurring hardwood pulp fiber in its naturally occurring state; and   b. depositing the fibrous composition onto a collection device to form a fibrous structure.