Aerosol-generating article with ventilated hollow segment

Abstract

An aerosol-generating article for producing an inhalable aerosol upon heating is provided, the article including: a rod of aerosol-generating substrate; a mouthpiece segment including a plug of filtration material and being disposed downstream of and in longitudinal alignment with the rod; a hollow tubular segment between and in longitudinal alignment with the rod and the mouthpiece segment, the hollow tubular segment defining a cavity extending to an upstream end of the mouthpiece segment; and a ventilation zone at a location along the hollow tubular segment, the rod of aerosol-generating substrate including at least an aerosol former, the rod having an aerosol former content of at least 10 percent on a dry weight basis.

1 .- 15 . (canceled) 
     
     
         16 . An aerosol-generating article for producing an inhalable aerosol upon heating, the aerosol-generating article comprising:
 a rod of aerosol-generating substrate;   a mouthpiece segment comprising a plug of filtration material, the mouthpiece segment being disposed downstream of the rod and in longitudinal alignment with the rod;   a hollow tubular segment at a location between the rod and the mouthpiece segment, the hollow tubular segment being in longitudinal alignment with the rod and the mouthpiece segment, wherein the hollow tubular segment defines a cavity extending to an upstream end of the mouthpiece segment; and   a ventilation zone at a location along the hollow tubular segment,   wherein the rod of aerosol-generating substrate has a length of less than 35 millimetres;   wherein an equivalent internal diameter of the hollow tubular segment at the location of the ventilation zone is at least 5.5 millimetres,   wherein the rod of aerosol-generating substrate comprises at least an aerosol former, the rod of aerosol-generating substrate having an aerosol former content of at least 10 percent on a dry weight basis, and   wherein the aerosol-generating article has an overall RTD of less than 70 millimetres H 2 O (700 Pa).   
     
     
         17 . The aerosol-generating article according to  claim 16 , wherein the hollow tubular segment comprises a wrapper circumscribing the rod and the mouthpiece segment. 
     
     
         18 . The aerosol-generating article according to  claim 16 , wherein the hollow tubular segment comprises a tube formed from a cellulosic material. 
     
     
         19 . The aerosol-generating article according to  claim 18 , further comprising a wrapper circumscribing the rod, the tube, and the mouthpiece segment. 
     
     
         20 . The aerosol-generating article according to  claim 16 , wherein an equivalent internal diameter of the hollow tubular segment is substantially constant along a length of the hollow tubular segment. 
     
     
         21 . The aerosol-generating article according to  claim 16 , wherein the ventilation zone is at a location along the hollow tubular segment at least 2 millimetres from the upstream end of the mouthpiece segment. 
     
     
         22 . The aerosol-generating article according to  claim 16 , wherein the aerosol-generating article has a ventilation level of at least 10 percent. 
     
     
         23 . The aerosol-generating article according to  claim 16 , wherein the aerosol-generating article has a ventilation level of less than 60 percent. 
     
     
         24 . The aerosol-generating article according to  claim 16 , wherein the hollow tubular segment has a length of between 10 millimetres and 30 millimetres. 
     
     
         25 . The aerosol-generating article according to  claim 16 , wherein a thickness of a peripheral wall of the hollow tubular segment at the location of the ventilation zone is less than 1.5 millimetres. 
     
     
         26 . The aerosol-generating article according to  claim 16 , wherein a thickness of the hollow tubular segment is at least 100 micrometres. 
     
     
         27 . The aerosol-generating article according to  claim 16 , wherein an RTD of the aerosol-generating article is at least 30 millimetres H 2 O (300 Pa).