Aerosol-Generating Substrate Comprising Granulated Flavoured Particles

Abstract

An aerosol-generating article includes a foamed tobacco-containing aerosol-generating substrate and a plurality of non-tobacco granulated flavour particles incorporated into the aerosol-generating substrate which is provided in the form of a semi-solid matrix. The granulated flavour particles can be distributed evenly in the semi-solid matrix or the granulated flavour particles can be provided in an increasing gradient density towards the longitudinal central axis of the aerosol-generating article.

1 . An aerosol-generating article comprising a foamed tobacco-containing aerosol-generating substrate and a plurality of non-tobacco granulated flavour particles incorporated into the aerosol-generating substrate. 
     
     
         2 . The aerosol-generating article according to  claim 1 , wherein up to 10.0% of a total weight of the aerosol-generating substrate is the plurality of granulated flavour particles. 
     
     
         3 . The aerosol-generating article according to  claim 1 , wherein the plurality of granulated flavour particles is provided in the aerosol-generating substrate with a density of less than 2.0 g/cm 3 . 
     
     
         4 . The aerosol-generating article according to  claim 1 , wherein the plurality of granulated flavour particles is provided ranging from between 2.0 wt. % and 10.0 wt. % of a total weight of the aerosol-generating substrate. 
     
     
         5 . The aerosol-generating article according to  claim 1 , wherein the plurality of granulated flavour particles comprises a gel of a polysaccharide. 
     
     
         6 . The aerosol-generating article according to  claim 1 , wherein the plurality of granulated flavour particles comprises a gel of a polysaccharide containing no gelling agent. 
     
     
         7 . The aerosol-generating article according to  claim 1 , wherein each of the granulated flavour particles has a mean diameter of between 0.1 mm and 3 mm. 
     
     
         8 . The aerosol-generating article according to  claim 1 , further comprising a tobacco-containing portion comprising the aerosol-generating substrate and a filter portion. 
     
     
         9 . The aerosol-generating article according to  claim 1 , wherein the aerosol-generating substrate incorporating the plurality of non-tobacco granulated flavour particles is provided in an increasing gradient density towards a longitudinal central axis of the aerosol-generating article. 
     
     
         10 . A method of preparing an aerosol-generating substrate for smoking, comprising the steps of:
 a. providing a mixture comprising at least one of propylene glycol, 1, 3-Propanediol, glycerol, water, gum, or binder;   b. thereafter, mixing the mixture;   c. thereafter, providing tobacco-containing material into the mixture;   d. thereafter, mixing the mixture;   e. thereafter, providing a plurality of granulated non-tobacco flavour particles into the mixture to form an aerosol-generating substrate; and   f. thereafter, mixing the mixture.   
     
     
         11 . The method according to  claim 10 , wherein in each of steps b, d, and f, the mixture is constantly mixed for a certain amount of time and heated at above room temperature. 
     
     
         12 . The method according to  claim 10 , wherein in each of steps b, d, and f, the mixture is constantly mixed for at least 6 minutes and/or is heated at 45° C. and/or is aerated. 
     
     
         13 . The method according to  claim 10 , further comprising a step of providing a first layer of the aerosol-generating substrate encircled by a second layer of the aerosol-generating substrate, wherein the first layer has a higher volume and/or density of granulated flavour particles than the second layer. 
     
     
         14 . The aerosol-generating article according to  claim 1 , wherein the plurality of granulated flavour particles is provided in the aerosol-generating substrate with a density of less than 1.0 g/cm 3 . 
     
     
         15 . The aerosol-generating article according to  claim 1 , wherein the plurality of granulated flavour particles is provided in the aerosol-generating substrate with a density of less than 0.5 g/cm 3 . 
     
     
         16 . The aerosol-generating article according to  claim 1 , wherein the plurality of granulated flavour particles is provided in the aerosol-generating substrate with a density of between 0.01 g/cm 3  and 0.1 g/cm 3 . 
     
     
         17 . The aerosol-generating article according to  claim 1 , wherein the plurality of granulated flavour particles is provided ranging from between 3.5 wt. % and 7.0% of a total weight of the aerosol-generating substrate. 
     
     
         18 . The aerosol-generating article according to  claim 1 , wherein the plurality of granulated flavour particles is provided ranging from between 4.5 wt. % and 6.0% of a total weight of the aerosol-generating substrate. 
     
     
         19 . The aerosol-generating article according to  claim 1 , wherein each of the granulated flavour particles has a mean diameter of between 0.5 mm and 2 mm. 
     
     
         20 . The aerosol-generating article according to  claim 1 , wherein each of the granulated flavour particles has a mean diameter of 1.5 mm.