Smoking article

Abstract

The present invention relates to a smoking article comprising a tobacco rod, a filter comprising at least one plug of filtration material wrapped with one or more filter wrappers, and a tipping material attaching the tobacco rod and the filter, wherein the tipping material has a basis weight of at least 50 grams per square metre, and a thickness of between about 40 and about 55 microns.

1 . A smoking article comprising:
 a tobacco rod;   a filter comprising at least one plug of filtration material wrapped with one or more filter wrappers; and   a tipping material attaching the tobacco rod and the filter;   wherein the tipping material has a basis weight of at least 50 grams per square metre, and a thickness of between about 40 and about 55 microns.   
     
     
         2 . A smoking article according to  claim 1 , wherein a hardness of the smoking article measured at any point of the filter when attached to the tobacco rod by the tipping material is less than about 90%. 
     
     
         3 . A smoking article according to  claim 1 , wherein a hardness of the smoking article measured at any point of the filter when attached to the tobacco rod by the tipping material is higher than about 85%. 
     
     
         4 . A smoking article according to  claim 1 , wherein a hardness of the smoking article measured at any point of the filter when attached to the tobacco rod by the tipping material is of between about 85% and about 95%. 
     
     
         5 . A smoking article according to  claim 1 , wherein the basis weight of the tipping material is between about 50 and about 80 grams per square metre. 
     
     
         6 . A smoking article according to  claim 1 , wherein the one or more filter wrappers have a basis weight of between about 20 and about 50 grams per square metre. 
     
     
         7 . A smoking article according to  claim 1 , wherein the one or more filter wrappers are non-porous wrappers. 
     
     
         8 . A smoking article according to  claim 1 , wherein the at least one plug of filtration material forming the filter has a plasticizer content of between about 5% and 10%. 
     
     
         9 . A smoking article according to  claim 1 , wherein the tipping material has a thickness of between about 45 to 52 microns. 
     
     
         10 . A smoking article according to  claim 1 , wherein the one or more filter wrappers is a single filter wrapper, and the at least one plug of filtration material is a single plug of filtration material wrapped with the single filter wrapper. 
     
     
         11 . A smoking article according to  claim 10 , wherein the plug of filtration material extends along the whole length of the filter. 
     
     
         12 . A smoking article according to  claim 1 , wherein the at least one plug of filtration material includes at least one first plug of non-wrap acetate filtration material. 
     
     
         13 . A smoking article according to  claim 12 , wherein the one or more filter wrappers is a single filter wrapper, and the at least one plug of filtration material further includes at least one second plug of non-wrap acetate filtration material, the first and second plugs of non-wrap acetate filtration material being overwrapped by the single filter wrapper holding both first and second plugs in a spaced relationship to define a cavity there-between. 
     
     
         14 . A smoking article according to  claim 13 , wherein the filter comprises at least one fluid-releasing member positioned in the cavity. 
     
     
         15 . A smoking article according to  claim 1 , wherein the one or more filter wrappers comprises a waterproof non-porous wrapper.