Aerosol generating article including porous tobacco solid and method of manufacturing porous tobacco solid

Abstract

Provided is an aerosol generating article including a first portion comprising an aerosol generating element, a second portion comprising a tobacco element, a third portion comprising a cooling element, and a fourth portion comprising a filter element, wherein the first portion, the second portion, the third portion, and the fourth portion are sequentially provided in a length direction of the aerosol generating article, and wherein the second portion comprises a porous tobacco solid that comprises the tobacco element.

1 . An aerosol generating article comprising:
 a first portion comprising an aerosol generating element;   a second portion comprising a tobacco element;   a third portion comprising a cooling element; and   a fourth portion comprising a filter element,   wherein the first portion, the second portion, the third portion, and the fourth portion are sequentially provided in a length direction of the aerosol generating article, and   wherein the second portion comprises a porous tobacco solid that comprises the tobacco element.   
     
     
         2 . The aerosol generating article of  claim 1 , wherein the porous tobacco solid comprises at least one passage penetrating from upstream of the aerosol generating article to downstream of the aerosol generating article, and
 wherein a plurality of pores connected to the at least one passage is formed in an outer circumferential surface of the porous tobacco solid.   
     
     
         3 . The aerosol generating article of  claim 2 , wherein an average diameter of the at least one passage ranges from 1 mm to 4 mm. 
     
     
         4 . The aerosol generating article of  claim 2 , wherein an average diameter of the plurality of pores ranges from 0.1 mm to 1 mm. 
     
     
         5 . The aerosol generating article of  claim 1 , wherein a specific surface area of the porous tobacco solid ranges from 200 m 2 /g to 1000 m 2 /g. 
     
     
         6 . The aerosol generating article of  claim 1 , wherein the second portion comprises a thermally conductive wrapper provided on the porous tobacco solid. 
     
     
         7 . A method of manufacturing a porous tobacco solid, the method comprising:
 providing a tobacco composition including tobacco powder, a binder, and a moisturizer;   inserting the tobacco composition into a cylindrical frame in which at least one gas spray pipe is provided; and   spraying gas from the at least one gas spray pipe on the tobacco composition inserted into the cylindrical frame to form the porous tobacco solid.   
     
     
         8 . The method of  claim 7 , wherein the tobacco composition includes 60 wt.% to 80 wt.% of the tobacco powder, 15 wt.% to 30 wt.% of the binder, and 5 wt.% to 10 wt.% of the moisturizer. 
     
     
         9 . The method of  claim 7 , wherein the at least one gas spray pipe has a plurality of holes through which gas is sprayable onto an outer circumferential surface of the porous tobacco solid. 
     
     
         10 . The method of  claim 7 , further comprising:
 drying the outside of the tobacco composition inserted into the cylindrical frame after the inserting the tobacco composition into the cylindrical frame and prior to the spraying the gas.   
     
     
         11 . The method of  claim 7 , wherein a temperature of the gas sprayed from the gas spray pipe ranges from 80° C. to 120° C. 
     
     
         12 . The method of  claim 7 , wherein a pressure of the gas sprayed from the gas spray pipe ranges from 0.5 mmbar to 3 mmbar. 
     
     
         13 . The method of  claim 7 , wherein the gas sprayed from the at least one gas spray pipe further comprises a flavor element.