Aerosol-generating article having two or more substrate segments

Abstract

An aerosol-generating article is provided, including: an aerosol-generating rod configured to produce an inhalable aerosol upon heating, the aerosol-generating rod including a first aerosol-generating segment including a first aerosol-generating substrate, the first aerosol-generating substrate including tobacco and having a bulk density of less than 400 mg per cubic centimetre, and a second aerosol-generating segment at a location upstream of the first aerosol-generating segment and including a second aerosol-generating substrate, the second aerosol-generating substrate having a bulk density of at least 500 mg per cubic centimetre, the second aerosol-generating substrate having a higher aerosol-former content than the first aerosol-generating substrate, and a ratio of a length of the first aerosol-generating segment to a length of the second aerosol-generating segment being no more than 0.6. An aerosol-generating system including the aerosol-generating article and an aerosol-generating device is also provided.

1 .- 15 . (canceled) 
     
     
         16 . An aerosol-generating article, comprising:
 an aerosol-generating rod configured to produce an inhalable aerosol upon heating, the aerosol-generating rod comprising:
 a first aerosol-generating segment comprising a first aerosol-generating substrate, the first aerosol-generating substrate comprising tobacco and having a bulk density of less than 400 mg per cubic centimetre, and 
 a second aerosol-generating segment at a location upstream of the first aerosol-generating segment and comprising a second aerosol-generating substrate, the second aerosol-generating substrate having a bulk density of at least 500 mg per cubic centimetre, 
   wherein the second aerosol-generating substrate has a higher aerosol-former content than the first aerosol-generating substrate, and   wherein a ratio of a length of the first aerosol-generating segment to a length of the second aerosol-generating segment is no more than 0.6.   
     
     
         17 . The aerosol-generating article according to  claim 16 , wherein the first aerosol-generating substrate comprises tobacco cut filler. 
     
     
         18 . The aerosol-generating article according to  claim 16 , wherein the second aerosol-generating substrate comprises homogenised tobacco material. 
     
     
         19 . The aerosol-generating article according to  claim 16 , wherein the second aerosol-generating substrate comprises an aerosol-generating film comprising a cellulose based film forming agent, nicotine, and aerosol-former. 
     
     
         20 . The aerosol-generating article according to  claim 16 , wherein a bulk density of the second aerosol-generating substrate is at least 200 mg per cubic centimetre higher than a bulk density of the first aerosol-generating substrate. 
     
     
         21 . The aerosol-generating article according to  claim 16 , wherein a bulk density of the second aerosol-generating substrate is at least 1.5 times a bulk density of the first aerosol-generating substrate. 
     
     
         22 . The aerosol-generating article according to  claim 16 ,
 wherein the first aerosol-generating substrate is circumscribed by a first wrapper, and   wherein the second aerosol-generating substrate is circumscribed by a second wrapper, separate from the first wrapper.   
     
     
         23 . The aerosol-generating article according to  claim 16 , wherein each of the first aerosol-generating substrate and second aerosol-generating substrate comprises at least 5 percent by weight of at least one aerosol-former, on a dry weight basis. 
     
     
         24 . The aerosol-generating article according to  claim 16 ,
 wherein an aerosol-former content of the first aerosol-generating substrate is less than 30 percent by weight, on a dry weight basis, and   wherein an aerosol-former content of the second aerosol-generating substrate is at least 40 percent by weight, on a dry weight basis.   
     
     
         25 . The aerosol-generating article according to  claim 16 , wherein the second aerosol-generating segment abuts an upstream end of the first aerosol-generating segment. 
     
     
         26 . The aerosol-generating article according to  claim 16 , further comprising an upstream element provided upstream of the aerosol-generating rod and abutting an upstream end of the second aerosol-generating segment. 
     
     
         27 . The aerosol-generating article according to  claim 16 ,
 further comprising a downstream section provided downstream of the aerosol-generating rod and extending to the downstream end of the aerosol-generating article,   wherein the downstream section comprises a hollow tubular cooling element.   
     
     
         28 . The aerosol-generating article according to  claim 16 , wherein the aerosol-generating article has a ventilation level of at least 40 percent. 
     
     
         29 . An aerosol-generating system, comprising:
 an aerosol-generating article according to  claim 16 ; and   an aerosol-generating device comprising a heating chamber configured to receive the aerosol-generating article and at least a heating element provided at or about the periphery of the heating chamber.