Tobacco material comprising flavor material and method of preparing the same

Abstract

The disclosure relates to a tobacco material including a flavor material and a method of preparing the tobacco material. The tobacco material may have a core-shell structure in which a core includes a first tobacco mixture and a flavor material and is surrounded by a shell including a second tobacco mixture, such that the aerosol generating article including the tobacco material generates a characteristic flavor.

1 . A tobacco material comprising:
 a core comprising a first tobacco mixture; and   a shell formed around the core and comprising a second tobacco mixture,   wherein the first tobacco mixture comprises first tobacco particles and a first flavor material, and   the second tobacco mixture comprises second tobacco particles.   
     
     
         2 . The tobacco material of  claim 1 , wherein the tobacco material comprises 5.0 to 8.0 parts by weight of moisture with respect to 100 parts by weight of the tobacco material. 
     
     
         3 . The tobacco material of  claim 1 , wherein the second tobacco mixture further comprises a second flavor material. 
     
     
         4 . The tobacco material of  claim 1 , wherein the first tobacco mixture comprises the first flavor material in an amount less than or equal to 20 parts by weight with respect to 100 parts by weight of the first tobacco mixture. 
     
     
         5 . The tobacco material of  claim 1 , wherein the core has a diameter of 0.1 mm to 0.5 mm, and the shell has a diameter of 0.4 mm to 1.2 mm. 
     
     
         6 . The tobacco material of  claim 1 , wherein the tobacco material has a viscosity of 5 cps to 200 cps. 
     
     
         7 . The tobacco material of  claim 1 , wherein the tobacco material has a surface roughness of 0.1 to 10.0. 
     
     
         8 . A smoking article comprising:
 a tobacco rod comprising the tobacco material according to  claim 1 ; and   a filter segment.   
     
     
         9 . A method of preparing a tobacco material, the method comprising:
 a first operation of forming a core by growing a first composition; and   a second operation of forming a shell surrounding the core.   
     
     
         10 . The method of  claim 9 , wherein the first operation comprises:
 introducing the first composition into a chamber; and   growing the first composition at a temperature in a range of about 30° C. to about 60° C., and under an air pressure less than or equal to about 1.5 bar.   
     
     
         11 . The method of  claim 9 , wherein the second operation comprises:
 placing the core in a chamber;   introducing a second composition into the chamber; and   growing the second composition around the core in the chamber under conditions of a temperature in a range of about 50° C. to about 90° C., and an air pressure less than or equal to about 1.5 bar.   
     
     
         12 . The method of  claim 9 , wherein the first composition comprises a first flavor material in an amount of 0.1% to 20% by volume. 
     
     
         13 . The method of  claim 9 , further comprising a third operation of adding a second flavor material to a surface of the formed shell.