Tobacco rod, aerosol-generating article including the same, and aerosol generation device used therewith

Abstract

A tobacco rod, an aerosol-generating article including the same, and an aerosol generation device used with the aerosol-generating article are provided. The tobacco rod according to some embodiments of the present disclosure may include a first filter segment, a second filter segment, and a cavity segment which is formed by the first filter segment and the second filter segment and filled with a tobacco material. Here, at least one of the first filter segment and the second filter segment may include a paper material that is grease-resistant or water-resistant. Accordingly, a problem that vapor production is decreased due to moisture absorption from components of smoke can be addressed, and a heat-resistant tobacco rod can be manufactured.

What is claimed is: 
     
         1 . A tobacco rod comprising:
 a first filter segment;   a second filter segment; and   a cavity segment which is formed by the first filter segment and the second filter segment and filled with a tobacco material,   wherein at least one of the first filter segment and the second filter segment includes a paper material that is grease-resistant or water-resistant.   
     
     
         2 . The tobacco rod of  claim 1 , wherein the paper material is a material whose measurement value according to a 3 M Kit Test is 5 or more. 
     
     
         3 . The tobacco rod of  claim 1 , wherein both the first filter segment and the second filter segment include the paper material that is grease-resistant or water-resistant. 
     
     
         4 . The tobacco rod of  claim 1 , wherein the tobacco material includes tobacco granules. 
     
     
         5 . The tobacco rod of  claim 4 , wherein:
 a density of the tobacco granules is in a range of 0.5 g/cm 3  to 1.2 g/cm 3 ; and   a diameter of the tobacco granules is in a range of 0.3 mm to 1.2 mm.   
     
     
         6 . The tobacco rod of  claim 4 , wherein:
 a filling rate of the tobacco granules in the cavity segment is 80 vol % or lower; and   the first filter segment is disposed downstream of the cavity segment and has resistance to draw in a range of 50 mmH 2 O/60 mm to 150 mmH 2 O/60 mm.   
     
     
         7 . An aerosol-generating article that is used with an aerosol generation device, the aerosol-generating article comprising:
 a tobacco rod including a first filter segment, a second filter segment, and a cavity segment which is formed by the first filter segment and the second filter segment and filled with a tobacco material; and   a filter rod,   wherein at least one of the first filter segment and the second filter segment includes a paper material that is grease-resistant or water-resistant.   
     
     
         8 . The aerosol-generating article of  claim 7 , wherein the filter rod includes a cooling segment and a mouthpiece segment. 
     
     
         9 . The aerosol-generating article of  claim 7 , wherein:
 the aerosol generation device includes a cartridge configured to store an aerosol-forming agent and a cartridge heater part configured to heat the cartridge to generate an aerosol; and   the aerosol generation device has an airflow path formed to allow the generated aerosol to pass through the aerosol-generating article.   
     
     
         10 . The aerosol-generating article of  claim 9 , wherein:
 the aerosol generation device further includes a heater part configured to heat the aerosol-generating article; and   the heater part includes a heating element disposed to heat only the cavity segment from outside.