Cigarette

Abstract

A cigarette is provided which includes a tobacco strand wrapped with a layer of paper having a water repellent impregnation made from a cellulose derivative. The water repellant impregnation is applied in at least two layers.

What is claimed is:  
     
         1 . A method for impregnating a layer of a cigarette paper wrapper with a water repellant coating to avoid spotting comprising: 
 applying a first layer of a cellulose derivative to said sheet of paper;    allowing said first layer to dry; and    applying a second layer of a cellulose derivative to a sheet of paper.    
     
     
         2 . A method as described in  claim 1 , wherein said cellulose derivative is ethyl cellulose.  
     
     
         3 . A method as described in  claim 2 , wherein the total amount of ethyl cellulose used for said layers of cellulose derivative combined is at least 1 g/m 2 .  
     
     
         4 . A method as described in  claim 2 , wherein said first layer and said second layer of cellulose derivative is applied on opposite sides of said paper.  
     
     
         5 . A method as described in  claim 2 , wherein said first and second layers of cellulose derivative is applied to the same side of said paper.  
     
     
         6 . A method as described in  claim 1 , wherein said first layer and said second layer of cellulose derivative is applied using a coating roller in a gravure process.  
     
     
         7 . A method as described in  claim 1 , wherein said impregnated layer of cigarette paper maintains an air permeability of at least 20 Coresta units.  
     
     
         8 . A method for impregnating a layer of paper in order to avoid spotting in a cigarette comprising a tobacco strand wrapped with said layer of paper applying a water repellent impregnation made from a cellulose derivative in at least two layers while maintaining air permeability of at least 20 Coresta units.  
     
     
         9 . A method according to  claim 8 , wherein the cellulose derivative is applied in a quantity of at least 1 g/m 2 .  
     
     
         10 . A method according to  claim 8 , wherein the cellulose derivative is applied by means of a coating roller in a gravure process.  
     
     
         11 . A method for impregnating a layer of a cigarette paper wrapper with a water repellant coating to avoid spotting comprising: 
 applying a first layer of a cellulose derivative to said sheet of paper; and    applying a second layer of a cellulose derivative to a sheet of paper.    
     
     
         12 . A method as described in  claim 11 , wherein said cellulose derivative is ethyl cellulose.  
     
     
         13 . A method as described in  claim 12 , wherein the total amount of ethyl cellulose used for said layers of cellulose derivative combined is at least 1 g/m 2 .  
     
     
         14 . A method as described in  claim 12 , wherein said first layer and said second layer of cellulose derivative is applied on opposite sides of said paper.  
     
     
         15 . A method as described in  claim 12 , wherein said first and second layers of cellulose derivative is applied to the same side of said paper.  
     
     
         16 . A method as described in  claim 11 , wherein said first layer and said second layer of cellulose derivative is applied using a coating roller in a gravure process.  
     
     
         17 . A method as described in  claim 11 , wherein said impregnated layer of cigarette paper maintains an air permeability of at least 20 Coresta units.  
     
     
         18 . A cigarette comprising a tobacco strand wrapped with a layer of paper having a water repellent impregnation made from a cellulose derivative, said cellulose derivative consisting of at least two layers and providing air permeability of at least 20 Coresta units.  
     
     
         19 . A cigarette as described in  claim 18 , wherein the cellulose derivative is ethyl cellulose.  
     
     
         20 . A cigarette as described in  claim 18 , wherein the cellulose derivative provides air permeability of at least 50 Coresta units.  
     
     
         21 . A cigarette as described in  claim 18 , wherein the cellulose derivative is applied on both sides of the paper.  
     
     
         22 . A cigarette as described in  claim 18 , wherein the cellulose derivative is applied in a quantity of at least 1 g/m 2 .  
     
     
         23 . A cigarette as described in  claim 18 , wherein the cellulose derivative is applied by means of a coating roller in a gravure process.  
     
     
         24 . A cigarette as described in  claim 18 , wherein the wrapper is composed of only one layer of paper.  
     
     
         25 . A cigarette wrapper comprising a water repellant impregnation made from a cellulose derivative, said cellulose derivative consisting of at least two layers and providing air permeability of least 20 Coresta units.  
     
     
         26 . A cigarette wrapper as described in  claim 25 , wherein said cellulose derivative is ethyl cellulose.  
     
     
         27 . A cigarette wrapper as described in  claim 25 , wherein said cellulose derivative provides air permeability of at least 50 Coresta units.  
     
     
         28 . A cigarette wrapper as described in  claim 25 , wherein the cellulose derivative is applied on both sides of the paper.  
     
     
         29 . A cigarette wrapper as described in  claim 25 , wherein the cellulose derivative is applied in a quantity of at least 1 g/m 2 .  
     
     
         30 . A cigarette wrapper as described in  claim 25 , wherein the cellulose derivative is applied by means of a coating roller in a gravure process.  
     
     
         31 . A cigarette wrapper as described in  claim 25 , wherein the wrapper is composed of only one layer of paper.