Article for use in a non-combustible aerosol provision system

Abstract

An article for use in or as a non-combustible aerosol provision system includes an aerosol-generating material section including aerosol-generating material and at least 5% aerosol-former material by weight of the aerosol-generating material. The article also includes a first tubular element immediately downstream of the aerosol-generating material section, the first tubular element defining a first hollow cavity and having a first tubular wall, and a second tubular element immediately downstream of the first tubular element, the second tubular element including a second tubular wall having a wall thickness of less than about 320 μm and the second tubular element having an axial length of greater than about 15 mm.

1 . An article for use in or as a non-combustible aerosol provision system, the article comprising:
 an aerosol-generating material section comprising aerosol-generating material and at least 5% aerosol-former material by weight of the aerosol-generating material;   a first tubular element immediately downstream of the aerosol-generating material section, the first tubular element defining a first hollow cavity and comprising a first tubular wall; and   a second tubular element immediately downstream of the first tubular element, the second tubular element defining a second hollow cavity and comprising a second tubular wall having a wall thickness of less than about 320 μm and the second tubular element having an axial length of greater than about 15 mm.   
     
     
         2 . An article according to  claim 1 , wherein the ratio of the thickness of the first tubular wall to the internal radius of the first hollow cavity is between about 0.6 and about 1.1. 
     
     
         3 . An article according to  claim 1 , wherein the ratio of the volume of the second hollow cavity to the volume of the first hollow cavity is between about 6.5 and about 8. 
     
     
         4 . An article according to  claim 1 , further comprising a mouth end component at the downstream end of the article. 
     
     
         5 . An article according to  claim 1 , wherein the second tubular wall comprises at least first and second overlapping paper layers each extending around substantially the whole circumference of the second tubular element. 
     
     
         6 . An article according to  claim 5 , wherein the at least first and second overlapping paper layers each comprise a thickness of between 30 and 150 μm and/or wherein the at least first and second overlapping paper layers each comprise a basis weight of between 25 and 130 gsm. 
     
     
         7 . An article according to  claim 5 , wherein the at least first and second overlapping paper layers are connected to each other by a layer of adhesive and/or wherein the first and second overlapping paper layers are each non-porous. 
     
     
         8 . An article according to  claim 1 , wherein the first tubular element has an axial length between about 5 mm and about 14 mm. 
     
     
         9 . An article according to  claim 1 , wherein the aerosol-generating material section is in the form of a rod having an axial length which is less than or equal to the axial length of the second tubular element. 
     
     
         10 . An article according to  claim 1 , wherein the aerosol-generating material section is in the form of a rod having an axial length which is between 50% and 80% of the axial length of the second tubular element. 
     
     
         11 . An article according to  claim 1 , wherein the average weight per mm of axial length of the article is less than about 14.5 mg/mm or less than about 14 mg/mm. 
     
     
         12 . An article according to  claim 1 , wherein the second tubular wall has a thickness of between about 160 μm and about 250 μm, and/or wherein the second tubular wall has a thickness which is less than about 15% or less than about 10% of the internal radius of the second hollow cavity. 
     
     
         13 . An article according to  claim 1 , wherein the second tubular element defines a second hollow cavity having a volume of at least about 520 mm 3 . 
     
     
         14 . An article according to  claim 1 , wherein the second tubular element has an axial length of greater than about 16 mm or greater than about 16.5 mm and/or wherein the second tubular element has an axial length which is at least 1.5 or at least 2 times greater than the axial length of the first tubular element. 
     
     
         15 . An article according to  claim 1 , wherein the aerosol-generating material comprises a plurality of strands or strips of aerosol-generating material. 
     
     
         16 . An article according to  claim 15 , wherein the strands or strips of aerosol-generating material are arranged such that their longitudinal dimension is substantially parallel with the longitudinal axis of the article. 
     
     
         17 . An article according to  claim 1 , wherein the aerosol-generating material is in the form of reconstituted sheet tobacco material. 
     
     
         18 . An article according to  claim 1 , wherein the combined volumes of the first and second hollow cavities is at least about 580 mm 3 , or at least about 620 mm 3  or at least about 650 mm 3 . 
     
     
         19 . A non-combustible aerosol provision system comprising a non-combustible aerosol provision device and an article according to  claim 1 . 
     
     
         20 . A non-combustible aerosol provision system according to  claim 19 , wherein the non-combustible aerosol provision device comprises a heating element configured for insertion into the aerosol-generating material of the article. 
     
     
         21 . A non-combustible aerosol provision system according to  claim 19 , wherein the non-combustible aerosol provision device comprises a housing and an aperture in the housing into which the article is inserted in use, and wherein the system is configured such that the second tubular element extends partially within and partially outside the housing when the article is fully inserted into the non-combustible aerosol provision device. 
     
     
         22 . A non-combustible aerosol provision system according to  claim 21 , wherein the system is configured such that the second tubular element extends at least about 5 mm within and at least about 8 mm outside the housing when the article is fully inserted into the non-combustible aerosol provision device. 
     
     
         23 . A non-combustible aerosol provision system according to  claim 21 , wherein the article comprises one or more ventilation apertures extending through said second tubular element at a location in the second tubular element which is outside the housing when the article is fully inserted into the non-combustible aerosol provision device.