Filters For Smoking Articles For Less Additive(s) Loss

Abstract

Improvements are provided in filters for use in smoking articles, including the use of randomly oriented discrete fibres. The improvements mainly relate to the loss of additive(s) in said filters and to the manufacture thereof. In one embodiment, a filter for a smoking article includes randomly oriented discrete fibres and at least one particulate additive, the at least one particulate additive being dispersed within the filter, wherein a value obtained by dividing a volume fraction of the at least one particulate additive by a volume fraction of the fibres is less than about 1100%.

1 . A filter for a smoking article comprising randomly oriented discrete fibres and at least one particulate additive, the at least one particulate additive being dispersed within the filter, wherein a value obtained by dividing a volume fraction of the at least one particulate additive by a volume fraction of the fibres is less than about 1100%. 
     
     
         2 . The filter according to  claim 1 , wherein a range of a combined loading amount of the at least one particulate additive and the fibres is between 2.4 mg/mm and 19 mg/mm. 
     
     
         3 . The filter according to  claim 2 , wherein the range of the combined loading amount of the at least one particulate additive and the fibres is 11 mg/mm to 13 mg/mm. 
     
     
         4 . The filter according to  claim 1 , wherein the at least one particulate additive is provided in an amount of between 1 mg/mm and 13.5 mg/mm. 
     
     
         5 . The filter according to  claim 4 , wherein the amount of the at least one particulate additive is in the range of from 8 mg/mm up to 10 mg/mm. 
     
     
         6 . The filter according to  claim 1 , wherein the fibres are provided in an amount of between 1.4 mg/mm and 5.5 mg/mm. 
     
     
         7 . The filter according to  claim 6 , wherein the amount of fibres is in the range of from 3.0 mg/mm up to 3.5 mg/mm. 
     
     
         8 . The filter according to  claim 1 , wherein the at least one particulate additive comprises or is charcoal. 
     
     
         9 . The filter according to  claim 1 , wherein the fibres have a filament denier in the range of from 3.0 D to 12.0 D. 
     
     
         10 . The filter according to  claim 1 , wherein the filter has a cylindrical shape with a circumference of the cylinder being equal to or smaller than 26 mm. 
     
     
         11 . A smoking article comprising a filter according to  claim 1 . 
     
     
         12 . A method of producing a filter for a smoking article, comprising:
 adding randomly oriented fibres and at least one particulate additive to the filter, wherein the at least one particulate additive is dispersed in the filter,   wherein a value obtained by dividing a volume fraction of the at least one particulate additive by a volume fraction of the fibres is less than about 1100%.