Aerosol-generating article having an aerosol-cooling element

Abstract

An aerosol-generating article is provided, including a plurality of elements assembled in the form of a rod, the elements including an aerosol-forming substrate and an aerosol-cooling element located downstream from the aerosol-forming substrate. The aerosol-cooling element includes a plurality of longitudinally extending channels and has a porosity of between 50% and 90% in the longitudinal direction. The aerosol-cooling element may have a total surface area of between about 300 mm2 per mm length and about 1000 mm2 per mm length. An aerosol passing through the aerosol-cooling element is cooled, and in some embodiments, water is condensed within the aerosol-cooling element.

1 . An aerosol-generating article comprising a plurality of elements assembled in the form of a rod, the plurality of elements including an aerosol-forming substrate, and an aerosol-cooling element located downstream from the aerosol-forming substrate within the rod, in which the aerosol-cooling element comprises a plurality of longitudinally extending channels, wherein the aerosol-cooling element comprises metallic foil. 
     
     
         2 . The aerosol-generating article according to  claim 1 , wherein the aerosol-cooling element comprises a plurality of longitudinally extending channels and has a porosity of between 50% and 90% in the longitudinal direction, the longitudinal porosity being derived from a ratio of the cross-sectional area of material forming the aerosol-cooling element and an internal cross-sectional area of the aerosol-generating article at the portion containing the aerosol-cooling element. 
     
     
         3 . The aerosol-generating article according to  claim 1 , wherein the the aerosol-cooling element comprises a crimped sheet material comprising a metallic foil. 
     
     
         4 . The aerosol-generating article according to  claim 1 , wherein the the aerosol-cooling element comprises a sheet material comprising a metallic foil, and wherein the sheet material is uncrimped and gathered. 
     
     
         5 . The aerosol-generating article according to  claim 1 , wherein the the aerosol-cooling element comprises a sheet material comprising a metallic foil, and wherein the sheet material is crimped and gathered. 
     
     
         6 . The aerosol-generating article according to  claim 1 , wherein the aerosol-cooling element comprises aluminium foil. 
     
     
         7 . The aerosol-generating article according to  claim 1 , wherein the aerosol-cooling element comprises paper or cardboard. 
     
     
         8 . The aerosol-generating article according to  claim 7 , wherein the aerosol-cooling element further comprises aluminium foil, and wherein the aerosol cooling element is formed by lamination. 
     
     
         9 . The aerosol-generating article according to  claim 1 , wherein the aerosol-cooling element has a total surface of between 300 mm2 per mm and 1000 mm2 per mm. 
     
     
         10 . The aerosol-generating article according to  claim 1 , wherein an aerosol evolved from the aerosol-forming substrate contains water vapour and a proportion of this water vapour is condensed to form water droplets as the aerosol is drawn through the aerosol-cooling element. 
     
     
         11 . The aerosol-generating article according to  claim 1 , wherein the aerosol-cooling element is between 7 mm and 28 mm in length. 
     
     
         12 . The aerosol-generating article according to  claim 1 , wherein the aerosol-cooling element is configured to cool an aerosol evolved from the aerosol-forming substrate by greater than 10 degrees Celsius as the aerosol is drawn through the aerosol-cooling element. 
     
     
         13 . The aerosol-generating article according to  claim 1 , wherein water vapour content of an aerosol evolved from the aerosol-forming substrate is reduced by between 20% and 90% on being drawn through the aerosol-cooling element. 
     
     
         14 . The aerosol-generating article according to  claim 1 , wherein the aerosol-cooling element comprises a material that undergoes a phase transition when an aerosol evolved from the aerosol-forming substrate is drawn through the aerosol-cooling element. 
     
     
         15 . The aerosol-generating article according to  claim 1 , further comprising a filter located downstream from the aerosol-cooling element within the rod. 
     
     
         16 . The aerosol-generating article according to  claim 15 , wherein the filter comprises cellulose acetate. 
     
     
         17 . The aerosol-generating article according to  claim 1 , further comprising a spacer element located between the aerosol-forming substrate and the aerosol-cooling element within the rod. 
     
     
         18 . The aerosol-generating article according to  claim 17 , wherein the spacer element is a hollow tube. 
     
     
         19 . The aerosol-generating article according to  claim 1 , further comprising an aerosol-generating substrate located upstream from the aerosol cooling element within the rod, wherein the aerosol-generating substrate comprises tobacco material. 
     
     
         20 . The aerosol-generating article according  claim 19 , further comprising an aerosol-generating substrate located upstream from the aerosol cooling element within the rod, wherein the aerosol-generating substrate comprises homogenized tobacco material. 
     
     
         21 . The aerosol-generating article according to  claim 1 , further comprising an aerosol-generating substrate located upstream from the aerosol cooling element within the rod, wherein the aerosol-generating substrate comprises non-tobacco material.