Tobacco raw material, method for manufacturing same, and tobacco product

Abstract

The present invention provides a tobacco raw material having a good smoking flavor and a method for producing the same. Provided is a tobacco raw material having a ratio, which is expressed as “water-extracted material weight/hexane-extracted material weight,” between the weight of an extracted material obtained by extraction using n-hexane as a solvent and the weight of an extracted material obtained following the extraction by further extraction using water as a solvent, of 0 or more and 1.5 or less.

1 . A tobacco raw material having a ratio, which is expressed as “water-extracted material weight/hexane-extracted material weight,” between the weight of an extracted material obtained by extraction using n-hexane as a solvent and the weight of an extracted material obtained following the extraction by further extraction using water as a solvent, of 0 or more and 1.5 or less. 
     
     
         2 . The tobacco raw material according to  claim 1 , wherein the sum of the weight of an extracted material obtained by extraction using n-hexane as the solvent and the weight of an extracted material obtained following the extraction by further extraction using water as the solvent is from 5 to 17 wt % of the weight of the tobacco raw material before the extractions. 
     
     
         3 . A method of producing a tobacco raw material, comprising: a first extraction step of extracting a leaf tobacco material using a solvent having a dielectric constant of 1 or more and less than 25 to obtain an extract and an extraction residue; a second extraction step of, after the first extraction step, extracting the extraction residue obtained in the first extraction step using a solvent having a dielectric constant of 25 or more to obtain an extraction residue; and the step of re-applying the extract obtained in the first extraction step to the extraction residue obtained in the second extraction step so as to form a leaf tobacco raw material. 
     
     
         4 . The production method according to  claim 3 , wherein the solvent used in the first extraction step is a solvent having a dielectric constant of from 1 to 20 and the solvent used in the second extraction step is water. 
     
     
         5 . The production method according to  claim 3 , wherein the solvent used in the first extraction step is one or more selected from among n-hexane, tetrahydrofuran and ethanol. 
     
     
         6 . A tobacco raw material obtained by the production method according to  claim 3 . 
     
     
         7 . A tobacco product which uses the tobacco raw material according to  claim 1 .