Aerosol-generating article with low resistance to draw and improved flavour delivery

Abstract

An aerosol-generating article for producing an inhalable aerosol upon heating is provided, the aerosol-generating article extending from a mouth end to a distal end and including: a rod-shaped aerosol-generating element including an aerosol-generating substrate, the aerosol-generating substrate including an aerosol-former; and a downstream section at a location downstream of the aerosol-generating element, the downstream section extending from a downstream end of the aerosol-generating element to the mouth end of the aerosol-generating article, the downstream section including a hollow tubular element, a length-to-diameter ratio of the aerosol-generating element being from about 0.5 to about 3.0, and a resistance-to-draw of the downstream section being less than 10 mm H 2 O.

1 .- 15 . (canceled) 
     
     
         16 . An aerosol-generating article for producing an inhalable aerosol upon heating, the aerosol-generating article extending from a mouth end to a distal end and comprising:
 a rod-shaped aerosol-generating element comprising an aerosol-generating substrate, the aerosol-generating substrate comprising an aerosol-former; and   a downstream section at a location downstream of the aerosol-generating element, the downstream section extending from a downstream end of the aerosol-generating element to the mouth end of the aerosol-generating article,   wherein the downstream section comprises a hollow tubular element,   wherein a length-to-diameter ratio of the aerosol-generating element is from about 0.5 to about 3.0, and   wherein a resistance-to-draw of the downstream section is less than 10 mm H 2 O.   
     
     
         17 . The aerosol-generating article according to  claim 16 , wherein the length-to-diameter ratio of the aerosol-generating element is from about 1.3 to about 1.9. 
     
     
         18 . The aerosol-generating article according to  claim 16 , wherein the aerosol-generating element has a length from about 10 millimetres to about 35 millimetres. 
     
     
         19 . The aerosol-generating article according to  claim 16 , wherein the aerosol-generating element has a diameter from about 6 millimetres to about 7.5 millimetres. 
     
     
         20 . The aerosol-generating article according to  claim 16 , wherein the aerosol-generating substrate comprises tobacco cut filler. 
     
     
         21 . The aerosol-generating article according to  claim 16 , wherein an aerosol former content in the aerosol-generating substrate is at least about 10 percent by weight. 
     
     
         22 . The aerosol-generating article according to  claim 16 , wherein the downstream section further comprises a ventilation zone at a location along the hollow tubular element. 
     
     
         23 . The aerosol-generating article according to  claim 22 , wherein the aerosol-generating article has a ventilation level of at least about 10 percent. 
     
     
         24 . The aerosol-generating article according to  claim 22 , wherein a distance between the ventilation zone and the mouth end of the aerosol-generating article is less than about 22 millimetres. 
     
     
         25 . The aerosol-generating article according to  claim 22 , wherein a distance between the ventilation zone and the mouth end of the aerosol-generating article is at least about 11 millimetres. 
     
     
         26 . The aerosol-generating article according to  claim 16 , wherein the hollow tubular element has a length of at least about 25 millimetres and a cross-section of the hollow tubular element is substantially constant. 
     
     
         27 . The aerosol-generating article according to  claim 16 , wherein a peripheral wall thickness of the hollow tubular element is less than about 1.5 millimetres. 
     
     
         28 . The aerosol-generating article according to  claim 16 , wherein the hollow tubular element extends all the way to the mouth end of the aerosol-generating article. 
     
     
         29 . The aerosol-generating article according to  claim 16 , wherein the downstream section has a resistance-to-draw of less than about 5 millimetres H 2 O. 
     
     
         30 . The aerosol-generating article according to  claim 16 , further comprising an upstream section upstream of the aerosol-generating element, the upstream section having a resistance-to-draw from about 10 millimetres H 2 O to about 70 millimetres H 2 O.