Aerosol-generating article having a shredded tobacco substrate and an upstream section

Abstract

An aerosol-generating article is provided, including: a rod of aerosol-generating substrate having a length of between 8 millimetres and 16 millimetres, the aerosol-generating substrate including a shredded tobacco material having an average density of between 150 mg per cubic centimetre and 500 mg per cubic centimetre; a downstream section provided downstream of the rod of aerosol-generating substrate, the downstream section including at least one hollow tubular element; and an upstream element provided upstream of the rod of aerosol-generating substrate and abutting an upstream end of the rod of aerosol-generating substrate, the upstream element having a length of between 2 millimetres and 8 millimetres.

1 .- 15 . (canceled) 
     
     
         16 . An aerosol-generating article, comprising:
 a rod of aerosol-generating substrate having a length of between 8 millimetres and 16 millimetres, wherein the aerosol-generating substrate comprises a shredded tobacco material having an average density of between 150 mg per cubic centimetre and 500 mg per cubic centimetre;   a downstream section provided downstream of the rod of aerosol-generating substrate, the downstream section comprising at least one hollow tubular element; and   an upstream element provided upstream of the rod of aerosol-generating substrate and abutting an upstream end of the rod of aerosol-generating substrate, the upstream element having a length of between 2 millimetres and 8 millimetres.   
     
     
         17 . The aerosol-generating article according to  claim 16 , wherein the upstream element comprises a hollow tubular segment having a central longitudinal cavity extending through it. 
     
     
         18 . The aerosol-generating article according to  claim 17 , wherein the hollow tubular segment of the upstream element has a wall thickness of less than 1 millimetre. 
     
     
         19 . The aerosol-generating article according to  claim 17 , wherein a ratio of the length of the hollow tubular segment to the wall thickness is at least 5. 
     
     
         20 . The aerosol-generating article according to  claim 17 , wherein a diameter of the central longitudinal cavity of the hollow tubular segment of the upstream element is at least 4 millimetres. 
     
     
         21 . The aerosol-generating article according to  claim 16 , wherein the upstream element is formed of a fibrous filtration material. 
     
     
         22 . The aerosol-generating article according to  claim 16 , wherein a resistance-to-draw (RTD) of the upstream element is less than or equal to 10 millimetres H 2 O. 
     
     
         23 . The aerosol-generating article according to  claim 16 , wherein the upstream element has a length of between 4 millimetres and 6 millimetres. 
     
     
         24 . The aerosol-generating article according to  claim 16 ,
 wherein the aerosol-generating substrate comprises one or more aerosol formers, and   wherein a content of aerosol former in the aerosol-forming substrate is at least 10 percent by weight, on a dry weight basis.   
     
     
         25 . The aerosol-generating article according to  claim 16 , wherein the upstream element is circumscribed by a wrapper. 
     
     
         26 . The aerosol-generating article according to  claim 16 , wherein the rod of aerosol-generating substrate has a resistance-to-draw (RTD) of between 4 millimetres H 2 O and 10 millimetres H 2 O. 
     
     
         27 . The aerosol-generating article according to  claim 16 , wherein the at least one hollow tubular element of the downstream section abuts a downstream end of the rod of aerosol-generating substrate. 
     
     
         28 . The aerosol-generating article according to  claim 16 , further comprising a ventilation zone at a location along the at least one hollow tubular element of the downstream section. 
     
     
         29 . The aerosol-generating article according to  claim 16 , wherein the downstream section further comprises a mouthpiece element. 
     
     
         30 . The aerosol-generating article according to  claim 16 , wherein the at least one hollow tubular element of the downstream section has a length of between 17 millimetres and 25 millimetres.