Aerosol Generating Article

Abstract

An aerosol generating article for a non-combustion aerosol generating device includes an air inlet end forming an upstream end and a mouth end forming a downstream end of the article and an aerosol generating substrate positioned between the upstream end and the downstream end. The substrate includes a first aerosol generating portion and at least one second aerosol generating portion positioned closer to the upstream end than the first aerosol generating portion so that the air flow is configured to pass through the second aerosol generating portion before passing through the first aerosol generating portion. The first aerosol generating portion includes tobacco material and the second aerosol generating portion includes a foam containing foam-forming agent and aerosol forming agent in a non-free liquid state in the foam configured to produce aerosol upon heating and is positioned closer to the upstream end than any aerosol generating portion comprising tobacco material.

1 . An aerosol generating article for a non-combustion aerosol generating device comprising an air inlet end forming an upstream end and a mouth end forming a downstream end of the article and an aerosol generating substrate positioned between the upstream end and the downstream end,
 wherein the substrate comprises a first aerosol generating portion and at least one second aerosol generating portion positioned closer to the upstream end than the first aerosol generating portion so that the air flow is configured to pass through the second aerosol generating portion before passing through the first aerosol generating portion,   wherein the first aerosol generating portion comprises tobacco material and the second aerosol generating portion comprises a foam containing a foam-forming agent and an aerosol forming agent in a non-free liquid state in the foam configured to produce aerosol upon heating and is positioned closer to the upstream end than any aerosol generating portion comprising tobacco material.   
     
     
         2 . The aerosol generating article according to  claim 1 , wherein the foam of the second aerosol generating portion further comprises a foam stabilizing agent and/or flavouring. 
     
     
         3 . The aerosol generating article according to  claim 1 , wherein the foam-forming agent is selected from the group consisting of hydrocolloid selected from the group of agar, gellan gum, an emulsifier selected from the group of lecithin, polyglycerol esters of fatty acids, glycerol esters of fatty acids, sorbitan esters of fatty acids, and/or mixtures thereof. 
     
     
         4 . The aerosol generating article according to  claim 2 , wherein the foam-stabilizing agent is selected from the group consisting of cellulose gum, hydroxyalkylated carbohydrates, derivatives thereof, or mixture thereof. 
     
     
         5 . The aerosol generating article according to  claim 2 , wherein the foam stabilizing agent comprises cellulose gum, or cellulose fibre. 
     
     
         6 . The aerosol generating article according to  claim 1 , wherein the aerosol forming agent in the second portion is in an amount of at least 40 wt. %. 
     
     
         7 . The aerosol generating article according to  claim 1 , wherein the first aerosol generating portion contains tobacco powder or tobacco cut filler. 
     
     
         8 . The aerosol generating article according to  claim 6 , wherein the first aerosol generating portion comprises a reconstituted tobacco substrate or tobacco lamina. 
     
     
         9 . The aerosol generating article according to  claim 8 , wherein the first aerosol generating portion comprises reconstituted tobacco substrate comprising between 50 to 80 wt. % of tobacco material, between 10 and 25 wt. % of aerosol forming agent, 0 to 15 wt. % of cellulose fiber and 0 to 10 wt. % of a binding agent. 
     
     
         10 . The aerosol generating article according to  claim 9 , wherein the reconstituted tobacco substrate is formed as gathered sheet(s), shreds, strips, granules or combinations thereof. 
     
     
         11 . The aerosol generating article according to  claim 1 , wherein the substrate is wrapped by an outer wrapper. 
     
     
         12 . The aerosol generating article according to  claim 1 , further comprising a filter and a spacing/cooling portion between the filter and the aerosol generating portions. 
     
     
         13 . The aerosol generating article according to  claim 1 , further comprising a filter adjacent to the first aerosol generating portion. 
     
     
         14 . The aerosol generating article according to  claim 1 , wherein at least one aerosol generating portion comprises at least one, airflow hollow tube extending in the air flow direction. 
     
     
         15 . The aerosol generating article according to  claim 1 , wherein the aerosol generating substrate comprises a plurality of airflow hollow tubes extending in the second aerosol generating portion; or
 at least one aerosol generating portion is formed of plurality of beads.   
     
     
         16 . The aerosol generating article according to  claim 14 , wherein the airflow hollow tube comprises a plurality of airflow hollow tubes. 
     
     
         17 . The aerosol generating article according to  claim 6 , wherein the aerosol forming agent in the second portion comprises propylene glycol, glycerin or a combination thereof. 
     
     
         18 . The aerosol generating article according to  claim 5 , wherein the foam stabilizing agent comprises carboxymethylcellulose (CMC) or derivatives thereof.