Aerosol generation

Abstract

Disclosed herein is an aerosol generating substrate comprising an aerosol generating material, wherein the aerosol generating material comprises an amorphous solid. The amorphous solid comprises an aerosol generating agent, wherein at least 65 wt % of the aerosol generating agent is aerosolised on heating of the aerosol generating material to 370° C. for a ten-second period under a 1.95 L/min airflow.

1 . An aerosol generating substrate comprising an aerosol generating material, wherein the aerosol generating material comprises an amorphous solid, the amorphous solid comprising an aerosol generating agent, wherein at least about 65 wt % of the aerosol generating agent is aerosolised on heating of the aerosol generating material to about 370° C. for a ten-second period under a 1.95 L/min airflow. 
     
     
         2 . An aerosol generating substrate according to  claim 1 , wherein at least about 70 wt % of the aerosol generating agent is aerosolised on heating of the aerosol generating material to about 370° C. for a ten-second period under a 1.95 L/min airflow. 
     
     
         3 . An aerosol generating substrate according to  claim 1 , wherein the amorphous solid comprises about 5-80 wt % of aerosol generating agent, calculated on a dry weight basis. 
     
     
         4 . An aerosol generating substrate according to  claim 1 , wherein the is selected from erythritol, sorbitol, glycerol, glycols, monohydric alcohols, high boiling point hydrocarbons, lactic acid, diacetin, triacetin, triethylene glycol diacetate, triethyl citrate, ethyl myristate, isopropyl myristate, methyl stearate, dimethyl dodecanedioate and dimethyl tetradecanedioate. 
     
     
         5 . An aerosol generating substrate according to  claim 4 , wherein the aerosol generating agent comprises glycerol. 
     
     
         6 . An aerosol generating substrate according to  claim 1 , wherein the amorphous solid comprises:
 about 1-60 wt % of a gelling agent;   about 5-80 wt % of an aerosol generating agent;   about 10-60 wt % of an active substance; and   optionally, a flavorant;   wherein these weights are calculated on a dry weight basis.   
     
     
         7 . An aerosol generating substrate according to  claim 6 , wherein the amorphous solid is a hydrogel and comprises less than about 20 wt % of water calculated on a wet weight basis. 
     
     
         8 . An aerosol generating substrate according to  claim 6 , wherein the gelling agent comprises one or more compounds selected from the group comprising alginates, pectins, starches and starch derivatives, celluloses and cellulose derivatives, gums, silica or silicones compounds, clays, polyvinyl alcohol and combinations thereof. 
     
     
         9 . An aerosol generating substrate according to  claim 1 , comprising from about 0.1-80 wt % of flavorant, calculated on a dry weight basis. 
     
     
         10 . An aerosol generating substrate according to  claim 6 , wherein the tobacco extract is an aqueous extract, obtained by extraction with water. 
     
     
         11 . An aerosol generating substrate according to  claim 1 , wherein the aerosol generating substrate additionally comprises a carrier on which the amorphous solid is provided. 
     
     
         12 . An aerosol generating article comprising an aerosol generating substrate according to  claim 1 . 
     
     
         13 . An aerosol generating article according  claim 12 , further comprising a heater which is configured to heat but not burn the aerosol generating substrate.