Aerosol-generating article comprising hollow tubular substrate element with sealing element

Abstract

An aerosol-generating article is provided, including: an aerosol-generating substrate including a hollow tubular substrate element having a peripheral wall defining a longitudinal airflow channel extending between an upstream end and a downstream end of the hollow tubular substrate element, the peripheral wall being formed of one or more layers of homogenised plant material; a sealing element at the upstream end of the hollow tubular substrate element, the sealing element being arranged to provide a substantially airtight seal at an upstream end of the longitudinal airflow channel; and a downstream section provided downstream of the aerosol-generating substrate.

1 .- 15 . (canceled) 
     
     
         16 . An aerosol-generating article, comprising:
 an aerosol-generating substrate comprising a hollow tubular substrate element having a peripheral wall defining a longitudinal airflow channel extending between an upstream end and a downstream end of the hollow tubular substrate element, wherein the peripheral wall is formed of one or more layers of homogenised plant material;   a sealing element at the upstream end of the hollow tubular substrate element, wherein the sealing element is arranged to provide a substantially airtight seal at an upstream end of the longitudinal airflow channel; and   a downstream section provided downstream of the aerosol-generating substrate.   
     
     
         17 . The aerosol-generating article according to  claim 16 , wherein the sealing element comprises a film layer affixed to the peripheral wall at the upstream end of the hollow tubular substrate element. 
     
     
         18 . The aerosol-generating article according to  claim 17 , wherein the film layer is pierceable. 
     
     
         19 . The aerosol-generating article according to  claim 17 , wherein the film layer comprises one or more polymeric layers. 
     
     
         20 . The aerosol-generating article according to  claim 17 , wherein the film layer comprises one or more metallic layers. 
     
     
         21 . The aerosol-generating article according to  claim 17 , wherein the film layer is heat sealed to the peripheral wall of the hollow tubular substrate element. 
     
     
         22 . The aerosol-generating article according to  claim 16 , wherein the sealing element comprises a paper wrapper folded over the upstream end of the hollow tubular substrate element. 
     
     
         23 . The aerosol-generating article according to  claim 22 , wherein the paper wrapper is provided with an impermeable coating layer. 
     
     
         24 . The aerosol-generating article according to  claim 16 , wherein the sealing element is affixed to the upstream end of the hollow tubular substrate element by means of an adhesive layer. 
     
     
         25 . The aerosol-generating article according to  claim 16 , wherein the sealing element extends downstream at least part way along an external surface of the peripheral wall of the hollow tubular substrate element from the upstream end of the hollow tubular substrate. 
     
     
         26 . The aerosol-generating article according to  claim 25 ,
 further comprising a fixing band extending circumferentially around the hollow tubular substrate element and overlying the portion of the sealing element extending downstream from the upstream end of the hollow tubular substrate element,   wherein the fixing band is affixed to an external surface of the hollow tubular substrate element.   
     
     
         27 . The aerosol-generating article according to  claim 26 , wherein the fixing band is a band of paper. 
     
     
         28 . The aerosol-generating article according to  claim 16 , wherein the longitudinal airflow channel has a length of at least 3 millimetres. 
     
     
         29 . The aerosol-generating article according to  claim 16 , wherein the peripheral wall of the hollow tubular substrate element has a cross-sectional porosity of at least 0.3. 
     
     
         30 . The aerosol-generating article according to  claim 16 , wherein the aerosol-generating substrate further comprises a tubular susceptor element on at least one surface of the hollow tubular substrate element.