A Tobacco Article Comprising a Coloured Wrapper External Surface and a Related Aerosol Generating Assembly

Abstract

A tobacco article for a heat-not-burn aerosol generating device. The aerosol generating device may include one or several heating elements. The tobacco article—may include a tobacco substrate portion, and wrapper wrapping the tobacco substrate portion and defining a wrapper external surface intended to be in contact or face at least partially each heating element. The wrapper's external surface is at least partially coloured by a colour such that an emissivity value for an infrared thermometer readings is higher than 0.85.

1 . A tobacco article for a heat-not-burn aerosol generating device comprising one or several heating element(s), the tobacco article comprising:
 a tobacco substrate portion; and   a wrapper wrapping the tobacco substrate portion and defining a wrapper external surface intended to be in contact or face at least partially each heating element,   wherein the wrapper external surface is at least partially coloured by a colour such that an emissivity value for an infrared thermometer readings is higher than 0.85.   
     
     
         2 . The tobacco article according to  claim 1 , wherein the emissivity value of the wrapper external surface for the infrared thermometer readings is between 0.90 and 0.98. 
     
     
         3 . The tobacco article according to  claim 1 , wherein the colour is obtained by mixing several dyes. 
     
     
         4 . The tobacco article according to  claim 3 , wherein the colour of each dye of the several dyes is chosen from a group comprising: red, green, blue and/or yellow. 
     
     
         5 . The tobacco article according to  claim 3 , wherein the several dyes are food dyes. 
     
     
         6 . The tobacco article according to  claim 1 , wherein the wrapper comprises vapour impermeable material. 
     
     
         7 . The tobacco article according to  claim 1 , wherein an area of the coloured part of the wrapper external surface is greater than 50% of its total area. 
     
     
         8 . The tobacco article according to  claim 1 , wherein the wrapper comprises paper. 
     
     
         9 . The tobacco article according to  claim 8 , wherein the colour of the wrapper external surface is obtained by colouring the paper. 
     
     
         10 . The tobacco article according to  claim 8 , wherein the colour is obtained by mixing several dyes, and
 wherein said dyes are added to pulp forming the paper of the wrapper.   
     
     
         11 . The tobacco article according to  claim 10 , wherein a weight part of each dye in the pulp is comprised between 0.1% and 5%. 
     
     
         12 . The tobacco article according to  claim 1 , wherein the wrapper external surface is mat. 
     
     
         13 . The tobacco article according to  claim 1 , defining a flat-shape. 
     
     
         14 . The tobacco article according to  claim 1 , wherein the colour is absorbs more radiation with wavelengths comprised between 600 nm to 2.5 μm than radiation having other wavelengths. 
     
     
         15 . An aerosol generating assembly, comprising:
 a tobacco article according to  claim 1 ; and   a heat-not-burn aerosol generating device adapted to operate with said tobacco article.   
     
     
         16 . The tobacco article according to  claim 9 , wherein the colour is obtained by mixing several dyes, and
 wherein said dyes are added to pulp forming the paper of the wrapper.   
     
     
         17 . The tobacco article according to  claim 1 , defining a flat-shaped cuboid. 
     
     
         18 . The tobacco article according to  claim 1 , wherein the wrapper external surface is at least partially coloured by the colour such that the emissivity value for the infrared thermometer reading is higher than 0.9. 
     
     
         19 . The tobacco article according to  claim 1 , wherein an area of the coloured part of the wrapper external surface is greater than 80% of its total area.