Aerosol generation

Abstract

Described herein is an aerosol-forming substrate comprising an aerosol-forming material provided on a carrier, wherein the aerosol-forming material comprises an amorphous solid and wherein one or more vents are provided in the aerosol-forming material to allow the passage of aerosol and/or gases through the aerosol-forming material in use.

1 . An aerosol-forming substrate comprising an aerosol-forming material provided on a carrier, wherein the aerosol-forming material comprises an amorphous solid and wherein one or more vents are provided in the aerosol-forming material to allow the passage of aerosol and/or gases through the aerosol-forming material in use. 
     
     
         2 . An aerosol-forming substrate according to  claim 1 , wherein the vents comprise apertures in the aerosol-forming material and/or burst points in the aerosol-forming material. 
     
     
         3 . An aerosol-forming substrate according to  claim 1 , wherein the carrier is substantially impermeable to gas or aerosol. 
     
     
         4 . An aerosol generating article for use in an aerosol generating assembly, wherein the article comprises an aerosol-forming substrate according to  claim 1 . 
     
     
         5 . An aerosol generating article according to  claim 4 , further comprising a heater configured to heat but not burn the aerosol-forming substrate. 
     
     
         6 . An aerosol generating assembly according to  claim 5 , wherein the carrier of the aerosol-forming substrate is substantially impermeable and is disposed between the aerosol-forming material and the heater. 
     
     
         7 . An aerosol generating assembly according to  claim 5 , wherein the assembly is a heat-not-burn device. 
     
     
         8 . An aerosol generating assembly according to  claim 5 , wherein the assembly is an electronic tobacco hybrid device. 
     
     
         9 . A method of making an aerosol-forming substrate according to  claim 1  comprising (a) forming a slurry comprising components of the amorphous solid or precursors thereof, (b) applying the slurry to the carrier, (c) setting slurry to form a gel and (d) drying to form an amorphous solid. 
     
     
         10 . A method according to  claim 9 , in which the vents are provided in the aerosol-forming material during step (b). 
     
     
         11 . A method according to  claim 9 , further comprising (e) forming the vents in the amorphous solid. 
     
     
         12 . A method according to  claim 11 , wherein the step (e) of forming vents in the amorphous solid comprises cutting the gel to provide apertures and/or burst points. 
     
     
         13 . A method according to  claim 12 , wherein the cutting step may employ one or more of a laser, an air jet, a water jet and a sharp implement.