Tobacco smoke filter

Abstract

A tobacco smoke filter or filter element including a longitudinally extending core of tobacco smoke filtering material of perimeter 14 to 17 mm; and an additive release vessel fully enclosed within the core; wherein the filtering material is a filamentary material having a filament denier of 5.3 or greater and a total denier of 18,000 or less.

1 . A tobacco smoke filter or filter element comprising a longitudinally extending core of tobacco smoke filtering material of perimeter 14 to 17 mm; and an additive release vessel fully enclosed within the core; wherein the filtering material is a filamentary material having a filament denier of 5.3 or greater and a total denier of 18,000 or less. 
     
     
         2 . A tobacco smoke filter or filter element according to  claim 1  wherein the longitudinally extending core of tobacco smoke filtering material is a substantially cylindrical core of tobacco smoke filtering material. 
     
     
         3 . A tobacco smoke filter or filter element according to  claim 1  wherein the longitudinally extending core of tobacco smoke filtering material is of perimeter or circumference 16 to 17 mm. 
     
     
         4 . A tobacco smoke filter or filter element according to  claim 1  further including a wrapper engaged around the longitudinally extending core. 
     
     
         5 . A tobacco smoke filter or filter element according to  claim 1  wherein the filtering material is filamentary cellulose acetate tow. 
     
     
         6 . A tobacco smoke filter or filter element according to  claim 1  wherein the filamentary material has a filament denier of 5.3 to 13, for example 5.3 to 9, for example 5.4 to 8, for example 6 to 7. 
     
     
         7 . A tobacco smoke filter or filter element according to  claim 1  wherein the filamentary material has a total denier of 9,000 to 18,000, for example 10,000 to 18,000, for example 12,000 to 17,000, for example 14,000 to 16,000. 
     
     
         8 . A tobacco smoke filter or filter element comprising a longitudinally extending core of tobacco smoke filtering material of perimeter 14 to 17 mm; and an additive release vessel fully enclosed within the core; wherein the tobacco smoke filtering material is cellulose acetate having a filament denier of 5.3 or greater and a total denier of 18,000 or less. 
     
     
         9 . A tobacco smoke filter or filter element according to  claim 8  wherein the longitudinally extending core of tobacco smoke filtering material is a substantially cylindrical core of tobacco smoke filtering material. 
     
     
         10 . A tobacco smoke filter or filter element according to  claim 8  wherein the longitudinally extending core of tobacco smoke filtering material is of perimeter or circumference 16 to 17 mm. 
     
     
         11 . A tobacco smoke filter or filter element according to  claim 8  further including a wrapper engaged around the longitudinally extending core. 
     
     
         12 . A tobacco smoke filter or filter element according to  claim 8  wherein the cellulose acetate has a filament denier of 5.3 to 13, for example 5.3 to 9, for example 5.4 to 8, for example 6 to 7. 
     
     
         13 . A tobacco smoke filter or filter element according to  claim 8  wherein the cellulose acetate has a total denier of 9,000 to 18,000, for example 10,000 to 18,000, for example 12,000 to 17,000, for example 14,000 to 16,000. 
     
     
         14 . A tobacco smoke filter or filter element according to  claim 1  wherein the additive release vessel is a capsule, for example a frangible capsule. 
     
     
         15 . A tobacco smoke filter or filter element according to  claim 1  wherein the additive release vessel includes additive in the form of a flavourant. 
     
     
         16 . A tobacco smoke filter or filter element according to  claim 1  wherein the additive release vessel is of width 2.0 to 4 mm, e.g. 3.2 to 3.7 mm, e.g. 3.5 mm. 
     
     
         17 . (canceled) 
     
     
         18 . A filter cigarette comprising a filter according to  claim 1 , joined to a wrapped tobacco rod with one end of the filter towards the tobacco. 
     
     
         19 . A multiple rod comprising a plurality of filters or filter elements according to  claim 1  joined end-to-end. 
     
     
         20 . A product rod comprising a plurality of individual tobacco smoke filters according to  claim 1 , abutted end to end; and a wrapper engaged around the plurality of filters. 
     
     
         21 . A filter cigarette comprising a filter which includes a filter element according to  claim 1 , joined to a wrapped tobacco rod with one end of the filter towards the tobacco. 
     
     
         22 . A product rod comprising a plurality of individual tobacco smoke filters including filter elements according to  claim 1 , abutted end to end; and a wrapper engaged around the plurality of filters.