Method for manufacturing tobacco granules, and aerosol generating article including tobacco granules manufactured thereby

Abstract

A method of manufacturing tobacco granules includes manufacturing ground tobacco by grinding raw tobacco, manufacturing a mixture including the ground tobacco and a solvent, manufacturing tobacco granules by using the mixture, and freeze-drying the tobacco granules.

1 . A method of manufacturing tobacco granules, the method comprising:
 manufacturing ground tobacco by grinding raw tobacco;   manufacturing a mixture including the ground tobacco and a solvent;   manufacturing tobacco granules by using the mixture; and   freeze-drying the tobacco granules.   
     
     
         2 . The method of  claim 1 , wherein the ground tobacco has a diameter of 10 μm to 100 μm. 
     
     
         3 . The method of  claim 1 , wherein the manufacturing of the ground tobacco is performed at a temperature of −15° C. to −120° C. 
     
     
         4 . The method of  claim 1 , wherein the solvent includes at least one selected from water and alcohols having 1 to 4 carbon atoms. 
     
     
         5 . The method of  claim 1 , wherein the solvent includes water and an alcohol having 1 to 4 carbon atoms, in a volume ratio of about 10:0 to about 5:5. 
     
     
         6 . The method of  claim 1 , wherein the manufacturing of the tobacco granules includes wet-extruding the mixture. 
     
     
         7 . The method of  claim 1 , wherein the manufacturing of the tobacco granules includes spraying the mixture in a fluidized-bed reactor. 
     
     
         8 . The method of  claim 1 , wherein the tobacco granules have a diameter of 0.5 mm to 1.5 mm. 
     
     
         9 . The method of  claim 1 , wherein the freeze-drying is performed at a temperature of −15° C. to −120° C. 
     
     
         10 . The method of  claim 1 , wherein the freeze-drying is performed in a vacuum. 
     
     
         11 . The method of  claim 1 , wherein a moisture content of the tobacco granules after the freeze-drying is 3 wt % to 10 wt % of the tobacco granules. 
     
     
         12 . The method of  claim 1 , wherein a porosity of the tobacco granules after the freeze-drying is 10% to 70%. 
     
     
         13 . An aerosol generating article comprising tobacco granules manufactured according to the method of  claim 1 .