Cooling filter and smoking article including the same

Abstract

The disclosure relates to a cooling filter and a smoking article including the same, and more particularly, to a cooling filter having a tubular shape with a hollow formed inside, and a main body portion, in which a coating layer is formed on a surface of the hollow, and the coating layer includes alkaline metal chloride, and a smoking article including the same. By using the filter, a smoking article with an effective cooling function and improved tobacco taste and long-lasting smoke flavor may be provided.

1 . A cooling filter comprising:
 a coating layer,   wherein the coating layer comprises alkaline metal chloride.   
     
     
         2 . The cooling filter of  claim 1 , wherein the coating layer has a basis weight of 1% to 30% of a basis weight of the filter and contains alkaline metal chloride. 
     
     
         3 . The cooling filter of  claim 1 , wherein the alkaline metal chloride is one or more kinds selected from a group consisting of sodium chloride, potassium chloride, and lithium chloride. 
     
     
         4 . The cooling filter of  claim 1 , wherein the filter has a tubular shape with a hollow formed inside and the coating layer is formed on a surface of the hollow. 
     
     
         5 . The cooling filter of  claim 1 , wherein the coating layer further comprises one or more kinds selected from a group consisting of cellulose, a cellulose derivative, an alcohol resin, and sugars. 
     
     
         6 . The cooling filter of  claim 5 , wherein the cellulose derivative is one or more kinds selected from a group consisting of methyl cellulose, ethyl cellulose, carboxymethyl cellulose, carboxyethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, hydroxyethylmethyl cellulose, and agar. 
     
     
         7 . The cooling filter of  claim 5 , wherein the alcohol resin is polyvinyl alcohol. 
     
     
         8 . The cooling filter of  claim 5 , wherein the cellulose, cellulose derivative, alcohol resin, or sugars is coated in a content of 0.1% to 15% of a basis weight of the filter. 
     
     
         9 . The cooling filter of  claim 1 , wherein the filter comprises one or more materials selected from a group consisting of paper, a polymer, and cellulose acetate. 
     
     
         10 . The cooling filter of  claim 1 , wherein the cooling filter has a length of 5 millimeters (mm) or more and a circumference of 14 to 27 mm. 
     
     
         11 . The cooling filter of  claim 1 , wherein the cooling filter has draw resistance of 0.1 to 3.5 mm H 2 O per millimeter. 
     
     
         12 . A smoking article comprising:
 a smoking material portion;   a cooling portion comprising the cooling filter of  claim 1  positioned downstream of the smoking material portion; and   a mouthpiece portion positioned downstream of the cooling portion.   
     
     
         13 . The smoking article of  claim 12 , wherein the smoking article is heating type tobacco and is in the form of a cigarette.