Banded cigarette paper with reduced ignition propensity

Abstract

A cigarette made from cigarette paper comprising a base web and at least one banded region comprising iron oxide nanoparticles. The at least one banded region has a porosity less than a porosity of the base web such that the at least one banded region exhibits a slower burn rate compared to adjacent non-banded regions.

1 . Cigarette paper comprising:
 a base web; and   at least one banded region comprising an add-on material and a burn promoter, wherein the burn promoter comprises iron oxide nanoparticles in sufficient quantity to reduce statistical occurrence of self-extinguishment; and   wherein the at least one banded region has a porosity less than a porosity of the base web such that the at least one banded region exhibits a slower burn rate compared to adjacent non-banded regions.   
   
   
       2 . The cigarette paper of  claim 1 , wherein non-banded regions adjacent the at least one banded region comprise iron oxide nanoparticles. 
   
   
       3 . The cigarette paper of  claim 1 , wherein iron oxide nanoparticles are only present in the at least one banded region. 
   
   
       4 . The cigarette paper of  claim 1 , wherein the add-on material comprises cellulose. 
   
   
       5 . The cigarette paper of  claim 1 , wherein the add-on material comprises starch. 
   
   
       6 . The cigarette paper of  claim 5 , wherein a ratio of iron oxide nanoparticles to starch is in the range of 0.35-0.55. 
   
   
       7 . A cigarette comprising:
 tobacco material; and   a cigarette paper wrapped around said tobacco material, said cigarette paper comprising:
 a base web; and 
 at least one banded region comprising an add-on material and a burn promoter, wherein the burn promoter comprises iron oxide nanoparticles in sufficient quantity to reduce statistical occurrence of self-extinguishment; and 
   wherein the at least one banded region has a porosity less than a porosity of the base web such that the at least one banded region exhibits a slower burn rate compared to adjacent non-banded regions.   
   
   
       8 . The cigarette of  claim 7 , wherein the cigarette does not self-extinguish in free burn conditions. 
   
   
       9 . The cigarette of  claim 7 , wherein the cigarette self-extinguishes in the at least one banded region when in contact with a combustible substrate. 
   
   
       10 . A method of making a cigarette comprising:
 wrapping the cigarette paper of  claim 1  around tobacco cut filler to make a tobacco rod;   slicing the tobacco rod into segments; and   optionally attaching a filter to one of the segments.   
   
   
       11 . A method of making cigarette paper comprising forming at least one banded region comprising iron oxide nanoparticles on a base web, wherein the at least one banded region has a porosity less than a porosity of the base web such that the at least one banded region exhibits a slower burn rate compared to adjacent non-banded regions. 
   
   
       12 . The method of  claim 11 , wherein the at least one banded region comprises cellulose. 
   
   
       13 . The method of  claim 12 , wherein the at least one banded region is formed by discharging a slurry comprising iron oxide nanoparticles and cellulose on the base web. 
   
   
       14 . The method of  claim 12 , wherein the base web comprises iron oxide nanoparticles. 
   
   
       15 . The method of  claim 14 , wherein the at least one banded region is formed by discharging a slurry comprising cellulose on the base web. 
   
   
       16 . The method of  claim 11 , wherein the at least one banded region comprises starch. 
   
   
       17 . The method of  claim 16 , wherein a ratio of iron oxide nanoparticles to starch is in the range of 0.35-0.55. 
   
   
       18 . The method of  claim 16 , wherein the at least one banded region is formed by printing a composition comprising iron oxide nanoparticles and starch on the base web or by printing a composition comprising starch on the base web. 
   
   
       19 . The method of  claim 16 , wherein the base web comprises iron oxide nanoparticles. 
   
   
       20 . A method of making a cigarette comprising:
 making cigarette paper according to  claim 11 ;   wrapping the cigarette paper around tobacco cut filler to make a tobacco rod;   slicing the tobacco rod into segments; and   optionally attaching a filter to one of the segments.