Electrically Conductive Consumable

Abstract

A consumable for an aerosol generating device includes a heating layer of an aerosol substrate formed to be positioned in sandwich between two electrodes of the device. The heating layer of aerosol substrate includes flavorant material and an aerosol forming agent. The layer further includes electrically conductive material in particulate form embedded in the layer, wherein the electrically conductive material is arranged in the heating layer to conduct electrical current between the two electrodes and to heat the aerosol substrate to a temperature sufficient to aerosolize the aerosol forming agent. A method for manufacturing such a consumable, a device for delivering a tobacco aerosol including the consumable, and a method for production of tobacco aerosol with the device are also provided.

1 . A consumable for an aerosol generating device comprising a heating layer of an aerosol substrate formed to be positioned in sandwich between two electrodes of the device, wherein the heating layer of the aerosol substrate comprises flavorant material and an aerosol forming agent,
 wherein the heating layer further comprises electrically conductive material in particulate form embedded in the heating layer, wherein the electrically conductive material is arranged in the heating layer to conduct electrical current between the two electrodes and to heat the aerosol substrate to a temperature sufficient to aerosolize the aerosol forming agent when the heating layer is positioned between the two electrodes of the device.   
     
     
         2 . The consumable according to  claim 1 , wherein:
 the electrically conductive material has an electrical conductivity of at least 3*10 2  S/m (at 20° C.).   
     
     
         3 . The consumable according to  claim 1 , wherein:
 a thickness of the heating layer is between 0.5 and 3 mm.   
     
     
         4 . The consumable according to  claim 1 , wherein:
 the electrically conductive material is distributed in and on the heating layer in an amount to allow electricity to flow from one electrode through a thickness of the heating layer to the other electrode when the heating layer is positioned between the two electrodes of the device.   
     
     
         5 . The consumable according to  claim 1 , wherein:
 the electrically conductive material is randomly distributed inside the heating layer and on a surface area of the heating layer.   
     
     
         6 . The consumable according to  claim 1 , wherein:
 the electrically conductive material comprises graphite and/or charcoal particles.   
     
     
         7 . The consumable according to  claim 1 , wherein:
 the electrically conductive material comprises an amount of 2.5 to 50 wt. % regarding to the heating layer.   
     
     
         8 . The consumable according to  claim 1 , wherein:
 the heating layer further comprises a binder in an amount between 0.5 and 2.5 wt. % regarding to the consumable.   
     
     
         9 . The consumable according to  claim 1 , wherein:
 the aerosol forming agent comprises an amount of less than 25 wt. % regarding to the consumable.   
     
     
         10 . The consumable according to  claim 1 , wherein:
 the heating layer further comprises water in an amount between 10 and 49.5 wt. % regarding to the consumable.   
     
     
         11 . The consumable according to  claim 1 , wherein:
 the flavorant material comprises tobacco in an amount up to 47.5 wt. % regarding to the consumable.   
     
     
         12 . The consumable according to  claim 11 , wherein:
 the tobacco comprises tobacco powder with a particle size lower than 1000 microns.   
     
     
         13 . The consumable according to  claim 11 , wherein:
 the tobacco comprises flue cured tobacco in an amount between 1 and 47.5 wt. % regarding to the consumable.   
     
     
         14 . A method for manufacturing a consumable for an aerosol generating device, comprising the steps of:
 mixing flavorant material with electrically conductive material in particulate form, an aerosol forming agent, and water to form a paste or dough,   pressing the paste or dough into a heating layer, and   solidifying the heating layer by curing and/or drying.   
     
     
         15 . A device for delivering a tobacco aerosol comprising the consumable according to  claim 1 , comprising:
 a pair of electrodes and a source of electrical energy to supply the electrodes, wherein the electrodes comprising a contact surface are configured to press the heating layer of the consumable in sandwich along at least a portion of a surface area of the heating layer.   
     
     
         16 . The consumable according to  claim 1 , wherein:
 a thickness of the heating layer is between 0.5 and 2 mm.   
     
     
         17 . The consumable according to  claim 1 , wherein:
 the electrically conductive material comprises an amount between 2.5 and 25 wt. % regarding to the heating layer.   
     
     
         18 . The consumable according to  claim 8 , wherein:
 the binder is CMC.   
     
     
         19 . The consumable according to  claim 9 , wherein:
 the aerosol forming agent is glycerin and/or propylene glycol.