Menthol-sorbed activated charcoal, cigarette filter, and filter-tipped cigarette

Abstract

Menthol-sorbed activated charcoal stably holding menthol during storage, and smoothly releasing menthol only during passage of tobacco smoke therethrough is provided. The menthol-sorbed activated charcoal is featured in that to activated charcoal having a specific surface area of 1500 m 2 /g or more but 1700 m 2 /g or less as measured by the BET method, menthol is sorbed at a sorption rate of 80% or more but 92% or less with reference to the saturated amount of menthol for the activated charcoal.

What is claimed is: 
     
         1 . Menthol-sorbed activated charcoal comprising activated charcoal having a specific surface area of 1500 m 2 /g or more but 1700 m 2 /g or less as measured by the BET method, with menthol being sorbed to the activated charcoal at a sorption rate of 80% or more but 92% or less with reference to the saturated amount of menthol for the activated charcoal. 
     
     
         2 . A cigarette filter containing a menthol-sorbed activated charcoal according to  claim 1 . 
     
     
         3 . The cigarette filter according to  claim 2 , wherein the filter has two or more segments, and the menthol-sorbed activated charcoal is contained in a portion thereof. 
     
     
         4 . The cigarette filter according to  claim 2 , wherein the filter material is a cellulose acetate material. 
     
     
         5 . A cigarette comprising a cigarette filter according to  claim 2 .