Smoking article

Abstract

The invention relates to a smoking article comprising tobacco, suction resistance and a chemical heat source in conjunction with the tobacco. According to the invention, the heat source comprises a heat chamber and is activated by external excitation. The invention relates further to a method for producing the smoking article.

1 . A smoking article, comprising:
 tobacco;   suction resistance;   chemical heat source in conjunction with the tobacco, wherein the heat source comprises a heat chamber formed by one continuous volume and that the heat source is activated by external heat and/or oxygen excitation.   
     
     
         2 . The smoking article according to  claim 1 , wherein the heat chamber is closed. 
     
     
         3 . The smoking article according to  claim 1 , wherein the heat chamber contains chemical compounds which are capable of producing heat. 
     
     
         4 . The smoking article according to  claim 1 , wherein the chemical compounds include a metal/metals, such as Fe, Al, Mg, Li, Co, Pt, Pd, Cu, Si and/or a strong oxygen-containing oxidizer. 
     
     
         5 . The smoking article according to  claim 1 , wherein the material of the heat chamber is a polymer-, paper-, natural fiber-, ceramic-, glass- and/or metal-based material. 
     
     
         6 . The smoking article according to  claim 1 , wherein the heat chamber is provided with a heat insulating and/or accumulating layer. 
     
     
         7 . The smoking article according to  claim 1 , wherein the chemical compounds in the heat chamber include iron and potassium permanganate, their reaction being activated by heat. 
     
     
         8 . The smoking article according to  claim 1 , wherein the weight ratio between the potassium permanganate and iron ranges from 5/95 to 95/5, preferably from 25/75 to 50/50 and is more preferably 30/70. 
     
     
         9 . The smoking article according to  claim 1 , wherein the chemical compounds in the heat chamber include Fe, Na 2 S, C and CaO, their reaction being activated by oxygen. 
     
     
         10 . The smoking article according to  claim 1 , wherein the suction resistance is a filter. 
     
     
         11 . The smoking article according to  claim 1 , wherein the article further comprises a starting heat providing element. 
     
     
         12 . The smoking article according to  claim 1 , wherein the starting heat providing element is a detonator, resistance wire, fuse and/or firing tape. 
     
     
         13 . The smoking article according to  claim 1 , wherein the article further comprises a cooling part. 
     
     
         14 . The smoking article according to  claim 1 , wherein the heat chamber is surrounded by the tobacco. 
     
     
         15 . The smoking article according to  claim 1 , wherein the tobacco is surrounded by the heat chamber. 
     
     
         16 . A method for producing the smoking article, the method comprising the steps of:
 forming the heat chamber by combining the chemical compounds and enclosing them inside the heat chamber,   contacting a layer of tobacco with the heat chamber,   disposing suction resistance at one end of the smoking article, and   coating the heat chamber contacted with the layer of tobacco.   
     
     
         17 . The method according to  claim 16 , wherein a heat insulating and/or accumulating layer is disposed between the heat chamber and the tobacco. 
     
     
         18 . The method according to  claim 16 , wherein an insulating layer is disposed onto the tobacco or the heat chamber before coating or in conjunction with the coating. 
     
     
         19 . The method according to  claim 16 , wherein a cooling part is disposed at one end of the smoking article before coating or in conjunction with the coating. 
     
     
         20 . The method according to  claim 19 , wherein the cooling part is disposed between suction resistance and tobacco. 
     
     
         21 . A method for producing the smoking article, the method comprising the steps of:
 fixing the chemical compounds onto a planar structure,   rolling the structure to form a tubular structure,   disposing the tobacco inside or outside the tubular structure.   
     
     
         22 . The method according to  claim 21 , wherein the planar structure includes tobacco paper, an insulating layer and/or a heat accumulating layer. 
     
     
         23 . The method according to  claim 21 , wherein a protective film, insulating and/or accumulating layer is disposed onto the chemical compounds preferably by lamination.