Aerosol-generating article having upstream element

Abstract

An aerosol-generating article is provided, including: a rod of aerosol-generating substrate; a downstream section provided downstream of the rod of aerosol-generating substrate and extending to a downstream end of the aerosol-generating article, the downstream section including a hollow tubular cooling element, the downstream section having a length of greater than 45 millimetres, and the hollow tubular cooling element having a length of at least 40 millimetres; 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 at least 3 millimetres, and the upstream element being made of filter material.

1 .- 15 . (canceled) 
     
     
         16 . An aerosol-generating article, comprising:
 a rod of aerosol-generating substrate;   a downstream section provided downstream of the rod of aerosol-generating substrate and extending to a downstream end of the aerosol-generating article, wherein the downstream section comprises a hollow tubular cooling element, wherein the downstream section has a length of greater than 45 millimetres, and wherein the hollow tubular cooling element has a length of at least 40 millimetres; 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, wherein the upstream element has a length of at least 3 millimetres, and wherein the upstream element is made of filter material.   
     
     
         17 . The aerosol-generating article according to  claim 16 , wherein the downstream section has a length of at least 50 millimetres. 
     
     
         18 . The aerosol-generating article according to  claim 16 , wherein the rod of aerosol-generating substrate has a length of less than 30 millimetres. 
     
     
         19 . The aerosol-generating article according to  claim 16 , wherein the aerosol-generating article has a total length of at least 60 millimetres. 
     
     
         20 . The aerosol-generating article according to  claim 16 , wherein the hollow tubular cooling element abuts the downstream end of the rod of aerosol-generating substrate. 
     
     
         21 . The aerosol-generating article according to  claim 16 , wherein a ratio of a length of the hollow tubular cooling element of the downstream section to a length of the rod of aerosol-generating substrate is at least 1.5. 
     
     
         22 . The aerosol-generating article according to  claim 16 , wherein a ratio of the length of the upstream element to a length of the hollow tubular element of the downstream section is between 0.01 and 0.15. 
     
     
         23 . The aerosol-generating article according to  claim 16 , wherein a maximum external diameter of the aerosol-generating article is less than 7 millimetres. 
     
     
         24 . The aerosol-generating article according to  claim 16 , wherein the upstream element has a length of between 3 millimetres and 6 millimetres. 
     
     
         25 . The aerosol-generating article according to  claim 16 , wherein the upstream element comprises a hollow tubular segment having a central longitudinal cavity extending through the hollow tubular segment. 
     
     
         26 . The aerosol-generating article according to  claim 25 , wherein the hollow tubular segment of the upstream element has a wall thickness of less than 1 millimetre. 
     
     
         27 . The aerosol-generating article according to  claim 16 , wherein the resistance-to-draw (RTD) of the upstream element is less than or equal to 10 millimetres H 2 O. 
     
     
         28 . The aerosol-generating article according to  claim 16 , further comprising a ventilation zone at a location along the hollow tubular cooling element of the downstream section. 
     
     
         29 . The aerosol-generating article according to  claim 16 , wherein a wall thickness of the hollow tubular cooling element of the downstream section is less than 0.5 millimetre. 
     
     
         30 . The aerosol-generating article according to  claim 16 , wherein the downstream section further comprises a downstream filter segment provided downstream of the hollow tubular cooling element.