Smoking articles with nanocellulose barrier

Abstract

A smoking article includes a lighting end longitudinally opposite a filter end that includes a filter. A fluid-releasing element is disposed longitudinally between the lighting end and filter end. A paper material circumscribes a portion of the smoking article, and a nanocellulose barrier disposed upon at least one surface or interface within the smoking article is provided, effective to control passage of fluid through the paper material.

We claim: 
     
         1 . A smoking article, comprising:
 a lighting end longitudinally opposite a filter end that includes a filter;   a fluid-releasing element disposed longitudinally between the lighting end and filter end;   a paper material circumscribing a portion of the smoking article, and   a nanocellulose barrier disposed upon at least one surface or interface within the smoking article between the a fluid-releasing element and the paper material, where the barrier is effective to control passage of fluid through the paper material.   
     
     
         2 . The smoking article of  claim 1 , where the paper material includes plug wrap circumscribing at least a portion of filter material. 
     
     
         3 . The smoking article of  claim 2 , where the fluid-releasing element includes a fluid-releasing capsule within the filter, and
 the nanocellulose barrier is disposed upon a surface of the plug wrap and is effective to prevent passage of fluid through the plug wrap.   
     
     
         4 . The smoking article of  claim 1 , comprising a filter material where at least a portion of the nanocellulose barrier is disposed on an exterior-facing surface of the filter material. 
     
     
         5 . The smoking article of  claim 4 , where the filter material includes the fluid-releasing element, which comprises at least one fluid-releasing capsule, and the nanocellulose barrier is effective to prevent passage of fluid out of the filter material through the paper material. 
     
     
         6 . The smoking article of  claim 1 , where the paper material is configured as wrapping material circumscribing a tobacco rod portion of the smoking article and where the nanocellulose barrier is also distributed on the wrapping material sufficiently restricting airflow therethrough in a manner effective to limit combustion of the tobacco rod in the absence of air being drawn through the tobacco rod. 
     
     
         7 . The smoking article of  claim 1 , where the paper material includes tipping material circumscribing at least a portion of filter material. 
     
     
         8 . The smoking article of  claim 7 , where the fluid-releasing element includes a fluid-releasing capsule within the filter, and
 the nanocellulose barrier is disposed upon a surface of the tipping material and is effective to prevent passage of fluid through the tipping material.   
     
     
         9 . A smoking article, comprising:
 a lighting end that includes a tobacco rod disposed longitudinally opposite a filter end that includes a filter;   a fluid-releasing element disposed within the filter;   a paper wrapping material circumscribing the tobacco rod,   a plug wrap material circumscribing the filter; and   a nanocellulose barrier circumscribing the filter, effective to control passage of fluid through the barrier.   
     
     
         10 . The smoking article of  claim 9 , further comprising tipping material circumscribing the plug wrap material and at least a portion of the paper wrapping material circumscribing the tobacco rod. 
     
     
         11 . The smoking article of  claim 10 , where the nanocellulose barrier is disposed upon a surface of the plug wrap material facing the filter. 
     
     
         12 . The smoking article of  claim 10 , where the nanocellulose barrier is disposed in an interface between the plug wrap material and the tipping material. 
     
     
         13 . The smoking article of  claim 9 , where the nanocellulose barrier is disposed upon a surface of the plug wrap material at a density of about 1 gram/meter 2  to about 5 grams/meter 2 . 
     
     
         14 . The smoking article of  claim 9 , where the nanocellulose barrier comprises nanocellulose fibers that are about 1 to about 2 micrometers in length and about 5 to about 20 nanometers in diameter. 
     
     
         15 . The smoking article of  claim 9 , further comprising at least one low-ignition-propensity region circumscribing the tobacco rod, where the at least one low-ignition-propensity region comprises nanocellulose material. 
     
     
         16 . The smoking article of  claim 9 , where one or more of a heat generation segment, an aerosol-generating segment, and a buffer region are disposed between the lighting end and the filter. 
     
     
         17 . The smoking article of  claim 9 , where the nanocellulose barrier comprises nanocellulose fibers that include a length to width ratio of at least 10:1. 
     
     
         18 . The smoking article of  claim 9 , where the nanocellulose barrier comprises nanocellulose fibers that include a length to width ratio of at least 100:1. 
     
     
         19 . A smoking article, comprising:
 a lighting end that includes a tobacco rod disposed longitudinally opposite a filter end that includes a filter;   a fluid-releasing flavor capsule disposed within the filter;   a paper wrapping material circumscribing the tobacco rod,   a plug wrap material circumscribing the filter;   a nanocellulose barrier coating disposed upon at least one surface of the plug wrap circumscribing the filter, said barrier effective to control passage of fluid through the barrier; and   tipping material circumscribing the plug wrap materials.   
     
     
         20 . The smoking article of  claim 19 , where the nanocellulose barrier comprises nanocellulose fibers that are about 1 to about 2 micrometers in length and about 5 to about 20 nanometers in diameter. 
     
     
         21 . The smoking article of  claim 19 , where one or more of a heat generation segment, an aerosol-generating segment, and a buffer region are disposed between the lighting end and the filter, and where the smoking article is configured for heating but not burning the tobacco rod during use.