Component for use in an aerosol provision system

Abstract

A component for use in a non-combustible aerosol provision system includes an inner body (11) comprising a first material and an outer body (12) comprising a second material, the outer body surrounding the inner body. A resistance to gaseous flow through the length of the inner body is less than a resistance to gaseous flow through the length of the outer body. There is also provided an article for use with a non-combustible aerosol provision device, the article including an aerosol generating material comprising at least one aerosol forming material a component. A method of manufacture is also described.

1 . A component for use in a non-combustible aerosol provision system, the component comprising:
 an inner body comprising a first material; and   an outer body comprising a second material, the outer body surrounding the inner body,   wherein a resistance to gaseous flow through the length of the inner body is less than a resistance to gaseous flow through the length of the outer body.   
     
     
         2 . A component according to  claim 1 , wherein the first material and/or the second material comprises filamentary tow. 
     
     
         3 . A component according to  claim 2 , wherein the filamentary tow comprises cellulose acetate. 
     
     
         4 . A component according to  claim 2 , wherein the filamentary tow comprises filaments having a cross-section with an isoperimetric ratio of 25 or less, 20 or less, or 15 or less. 
     
     
         5 . A component according to  claim 2 , wherein the filamentary tow comprises a weight per mm of length of the body which is between about 10% and about 30% of the range between the minimum and maximum weights of a tow capability curve generated for the filamentary tow. 
     
     
         6 . A component according to  claim 1 , wherein the first material and/or the second material comprises paper. 
     
     
         7 . A component according to  claim 1 , wherein the density of the first material is lower than the density of the second material. 
     
     
         8 . A component according to  claim 1 , wherein the inner body is substantially cylindrical and/or the outer body is tubular. 
     
     
         9 . A component according to  claim 1 , wherein the inner body and/or the outer body has a length in the range 5 mm to 15 mm. 
     
     
         10 . A component according to  claim 1 , wherein the length of the inner body is substantially the same as the length of the outer body. 
     
     
         11 . A component according to  claim 1 , further comprising an adhesive securing the inner body and the outer body to each other. 
     
     
         12 . A component according to  claim 1 , further comprising a tubular body. 
     
     
         13 . A component according to  claim 12 , wherein the tubular body defines a mouth end of the component. 
     
     
         14 . A component according to  claim 12 , wherein the tubular body has a length of at least about 10 mm or at least about 12 mm. 
     
     
         15 . A component according to  claim 1 , further comprising a wrapper surrounding the outer body. 
     
     
         16 . A component according to  claim 15 , wherein the wrapper has a citrate content of 2% by weight or less, or 1% by weight or less. 
     
     
         17 . An article for use with a non-combustible aerosol provision device, comprising:
 an aerosol generating material comprising at least one aerosol forming material; and   a component according to  claim 1 .   
     
     
         18 . An article according to  claim 17 , further comprising a tubular section disposed downstream of the aerosol generating material. 
     
     
         19 . An article according to  claim 18 , wherein the tubular section has a wall thickness between 0.5 mm and 2.5 mm. 
     
     
         20 . An article according to  claim 18 , wherein the tubular section has a length of at least 10 mm. 
     
     
         21 . An article according to  claim 18 , wherein the tubular section comprises a wall comprising an aerosol generating material. 
     
     
         22 . An article according to  claim 18 , wherein the tubular section comprises paper having a thickness greater than 325 microns and/or a wall having a permeability of at least 100 Coresta Units. 
     
     
         23 . An article according to  claim 17 , further comprising at least one ventilation area arranged to allow external air to flow into the article. 
     
     
         24 . An article according to  claim 23 , wherein said at least one ventilation area comprises a single row of ventilation apertures. 
     
     
         25 . An article according to  claim 23 , wherein said at least one ventilation area comprises two or more rows of ventilation apertures. 
     
     
         26 . An article according to  claim 23 , wherein the aerosol generating material is wrapped by a wrapper having a level of permeability greater than about 1000 Coresta Units, or about 2000 Coresta Units. 
     
     
         27 . An article according to  claim 23 , wherein the level of ventilation provided by said at least one ventilation area is within the range of 45% to 65% of the volume of aerosol generated by said non-combustible aerosol provision device passing through the article, or within the range of 40% to 60% of the volume of aerosol generated by said non-combustible aerosol provision device passing through the article. 
     
     
         28 . An article according to  claim 17 , wherein the article is configured such that when the article is inserted into the non-combustible aerosol provision device, the minimum distance between a heater of the non-combustible aerosol provision device and the tubular section of the article is at least about 3 mm. 
     
     
         29 . A method of manufacturing a component for use in a non-combustible aerosol provision system, the method comprising:
 forming an inner body; and   forming an outer body surrounding the inner body, wherein a resistance to gaseous flow through the length of the inner body is less than a resistance to gaseous flow through the length of the outer body.   
     
     
         30 . A method according to  claim 29 , wherein forming the outer body comprises forming the outer body integrally with the inner body. 
     
     
         31 . A method according to  claim 29 , wherein forming the outer body comprises forming the outer body separately from the inner body and arranging the inner body and the outer body so that the outer body surrounds the inner body.