Aerosol-generating article with low density substrate

Abstract

An aerosol-generating article is provided, including: an aerosol-generating substrate; a downstream section extending from a downstream end of the aerosol-generating substrate to a downstream end of the aerosol-generating article; and an upstream section upstream of the aerosol-generating substrate, the upstream section having a resistance-to-draw from about 10 millimetres H 2 O to about 70 millimetres H 2 O, the aerosol-generating substrate having a density of no more than 0.5 grams per cubic centimetre, and a ratio of a length of the aerosol-generating substrate to a length of the aerosol-generating article being no more than 0.4.

1 .- 15 . (canceled) 
     
     
         16 . An aerosol-generating article, comprising:
 an aerosol-generating substrate;   a downstream section extending from a downstream end of the aerosol-generating substrate to a downstream end of the aerosol-generating article; and   an upstream section upstream of the aerosol-generating substrate, the upstream section having a resistance-to-draw from about 10 millimetres H 2 O to about 70 millimetres H 2 O,   wherein the aerosol-generating substrate has a density of no more than 0.5 grams per cubic centimetre, and   wherein a ratio of a length of the aerosol-generating substrate to a length of the aerosol-generating article is no more than 0.4.   
     
     
         17 . The aerosol-generating article according to  claim 16 , wherein a ratio of a length of the aerosol-generating substrate to a total length of the aerosol-generating article is at least 0.1. 
     
     
         18 . The aerosol-generating article according to  claim 16 , wherein the aerosol-generating substrate has a length of at least 5 millimetres. 
     
     
         19 . The aerosol-generating article according to  claim 16 , wherein the aerosol-generating substrate has a length of no more than 80 millimetres. 
     
     
         20 . The aerosol-generating article according to  claim 16 , wherein the aerosol-generating article has a length of at least 35 millimetres. 
     
     
         21 . The aerosol-generating article according to  claim 16 , wherein the aerosol-generating article has a length of no more than 100 millimetres. 
     
     
         22 . The aerosol-generating article according to  claim 16 , wherein the aerosol-generating substrate has a density of at least 0.24 grams per cubic centimetre. 
     
     
         23 . The aerosol-generating article according to  claim 16 , wherein the aerosol-generating substrate comprises tobacco cut filler. 
     
     
         24 . The aerosol-generating article according to  claim 16 , wherein the aerosol-generating substrate comprises an aerosol former, the aerosol-generating substrate having an aerosol former content of at least about 10 percent by weight. 
     
     
         25 . The aerosol-generating article according to  claim 16 , further comprising a first ventilation zone at a location along the downstream section. 
     
     
         26 . The aerosol-generating article according to  claim 16 , wherein the downstream section has a resistance-to-draw of less than about 30 millimetres H 2 O. 
     
     
         27 . The aerosol-generating article according to  claim 16 , wherein the downstream section comprises an unobstructed airflow pathway from the downstream end of the aerosol-generating substrate to a downstream end of the downstream section. 
     
     
         28 . An aerosol-generating system, comprising:
 an aerosol-generating article according to  claim 16 ; and   an aerosol-generating device having a distal end and a mouth end, the aerosol-generating device comprising:
 a body extending from the distal end to the mouth end, the body defining a device cavity configured to removably receive the aerosol-generating article at the mouth end of the aerosol-generating device, and 
 a heater configured to heat the aerosol-generating substrate when the aerosol-generating article is received within the device cavity. 
   
     
     
         29 . The aerosol-generating system according to  claim 28 , wherein the heater of the aerosol-generating device is configured to circumscribe the aerosol-generating article when the aerosol-generating article is received within the device cavity. 
     
     
         30 . The aerosol-generating system according to  claim 28 , wherein the heater has a length of no more than 40 millimetres.