Cigarette paper and cigarette reducing visible sidestream smoke amount and carbon monoxide amount in mainstream smoke

Abstract

This invention is intended to provide a cigarette paper capable of reducing both a visible sidestream smoke amount and a carbon monoxide amount in a mainstream smoke. The invention provides a cigarette paper having a grammage of 40 to 55 g/m 2 and containing calcium carbonate in an amount of 18 g/m 2 or more. Where the primary particles of calcium carbonate having a columnar shape or a needle shape are used, the carbon monoxide amount in the mainstream smoke decreases significantly, as compared with the case where the primary particles of calcium carbonate having another shape are used.

What is claimed is: 
     
         1 . A cigarette paper having a grammage of 40 to 55 g/m 2  and containing calcium carbonate in an amount of 18 g/m 2  or more. 
     
     
         2 . The cigarette paper according to  claim 1 , wherein a primary particle of the calcium carbonate has a columnar shape or needle shape. 
     
     
         3 . The cigarette paper according to  claim 2 , wherein the primary particle of the calcium carbonate has an average aspect ratio of not less than 4 and less than 10 and has an average length (L) of 0.1 to 1.5 μm. 
     
     
         4 . The cigarette paper according to  claim 2 , wherein the secondary particle of the calcium carbonate is in the form of a bur shape. 
     
     
         5 . The cigarette paper according to  claim 4  having a density of 0.4 to 1.0 g/cm 3 . 
     
     
         6 . The cigarette paper according to  claim 1  containing a combustion regulating agent comprising an alkali metal citrate. 
     
     
         7 . The cigarette paper according to  claim 6 , containing the combustion regulating agent in an amount of 1.0 to 5.0% by weight. 
     
     
         8 . A cigarette comprising:
 a cigarette rod including tobacco shreds wrapped into a rod shape with the cigarette paper according to  claim 1 ; and   a filter coaxially connected to an end of the cigarette rod by a tipping paper.