Filter cigarette and method of making filter cigarette for an electrical smoking system

Abstract

A cigarette of an electrical smoking system includes a filter tipping including a web including added filtering material and a tubular wrapper around the web, and a tobacco rod portion adapted to generate a puff of smoke upon being heated by one or more heating elements during smoking, the tobacco rod portion being attached to the filter tipping.

1 . A cigarette of an electrical smoking system, comprising: 
 a filter tipping including a web including added filtering material and a tubular wrapper around the web; and    a tobacco rod portion adapted to generate a puff of smoke upon being heated by heating elements during smoking, the tobacco rod portion being attached to the filter tipping.    
   
   
       2 . The cigarette as set forth in  claim 1 , wherein the web is porous, the web includes paper, the web is a laminate, the web includes carbon paper, at least a portion of the web is formed into a non-planar shape, or an accordian shape, or the web is crimped or swaged.  
   
   
       3 . The cigarette as set forth in  claim 1 , wherein the filtering material includes an aminopropylsilyl group covalently bonded to a non-volatile inorganic substrate.  
   
   
       4 . The cigarette as set forth in  claim 3 , wherein the aminopropylsilyl group is a 3-aminopropylsilyl group.  
   
   
       5 . The cigarette as set forth in  claim 3 , wherein the substrate is silica gel.  
   
   
       6 . The cigarette as set forth in  claim 1 , wherein the filtering material is an ammonium containing compound filler used in the web.  
   
   
       7 . The cigarette as set forth in  claim 6 , wherein the filler includes an ammonium magnesium phosphate filler.  
   
   
       8 . The cigarette as set forth in  claim 1 , wherein the filtering material includes nanoparticles, and at least some of the nanoparticles are a filler used in the web and/or at least some of the nanoparticles are disposed on a surface of the web.  
   
   
       9 . The cigarette as set forth in  claim 8 , wherein the nanoparticles are capable of acting as at least one of an oxidant for converting carbon monoxide to carbon dioxide and a catalyst for converting carbon monoxide to carbon dioxide.  
   
   
       10 . The cigarette as set forth in  claim 8 , wherein the nanoparticles are selected from the group consisting of metals, metal compounds, metal oxides, doped metal oxides, and mixtures thereof.  
   
   
       11 . The cigarette as set forth in  claim 8 , wherein the nanoparticles are selected from the group consisting of Fe 2 O 3 , CuO, TiO 2 , CeO 2 , Ce 2 O 3 , Al 2 O 3 , Y 2 O 3  doped with zirconium, Mn 2 O 3  doped with palladium, and mixtures thereof.  
   
   
       12 . The cigarette as set forth in  claim 8 , wherein the nanoparticles have an average particle size of less than about 500 nm or the nanoparticles have an average particle size of less than about 50 nm.  
   
   
       13 . The cigarette as set forth in  claim 8 , wherein the nanoparticles have an average particle size of less than about 5 nm or the nanoparticles have a surface area of at least about 20 m 2 /g.  
   
   
       14 . The cigarette as set forth in  claim 8 , wherein the nanoparticles have a surface area of at least about 200 m 2 /g.  
   
   
       15 . The cigarette as set forth in  claim 1 , wherein the filtering material is reactive with at least one component of cigarette smoke.  
   
   
       16 . The cigarette as set forth in  claim 1 , wherein the filter tipping includes a filter plug disposed at an end of the filter tipping opposite the tobacco rod portion.  
   
   
       17 . The cigarette as set forth in  claim 1 , wherein the filter tipping includes a tubular free-flow filter having an internal opening in which the web is disposed.  
   
   
       18 . The cigarette as set forth in  claim 1 , wherein the web contacts an interior surface of the wrapper.  
   
   
       19 . The cigarette as set forth in  claim 1 , wherein the tobacco rod portion includes at least one of a plug portion, a free-flow filter, a void portion and a tobacco web.