Aerosol-forming substrate and aerosol-delivery system

Abstract

There is described an aerosol-forming substrate for use in combination with an inductive heating device. The aerosol-forming substrate comprises a solid material capable of releasing volatile compounds that can form an aerosol upon heating of the aerosol-forming substrate, and at least a first susceptor material for heating of the aerosol-forming substrate. The first susceptor material has a first Curie-temperature and is arranged in thermal proximity of the solid material. The aerosol-forming substrate comprises at least a second susceptor material having a second Curie-temperature which is arranged in thermal proximity of the solid material. The first and second susceptor materials have specific absorption rate (SAR) outputs which are distinct from each other. Alternatively or in addition thereto the first Curie-temperature of the first susceptor material is lower than the second Curie-temperature of the second susceptor material, and the second Curie-temperature of the second susceptor material defines a maximum heating temperature of the first and second susceptor materials. There is also described an aerosol-delivery system.

1 . An aerosol-forming substrate for use in combination with an inductive heating device, the aerosol-forming substrate comprising a solid material capable of releasing volatile compounds that can form an aerosol upon heating of the aerosol-forming substrate, and at least a first susceptor material for heating the aerosol-forming substrate, the first susceptor material having a first Curie-temperature and being arranged in thermal proximity of the solid material, the aerosol-forming substrate comprising at least a second susceptor material having a second Curie-temperature and being arranged in thermal proximity of the solid material, the first and second susceptor materials having specific absorption rate (SAR) outputs which are distinct from each other and/or the first Curie-temperature of the first susceptor material being lower than the second Curie-temperature of the second susceptor material, and the second Curie-temperature of the second susceptor material defining a maximum heating temperature of the first and second susceptor materials. 
     
     
         2 . The aerosol-forming substrate according to  claim 1 , wherein the first and second Curie-temperatures of the first and second susceptor materials are selected such, that upon being inductively heated an overall average temperature of the aerosol-forming substrate does not exceed 240° C. 
     
     
         3 . The aerosol-forming substrate according to  claim 1 , wherein the second Curie-temperature of the second susceptor material does not exceed 370° C. 
     
     
         4 . The aerosol-forming substrate according to  claim 1 , wherein at least one of the first and second susceptor materials is one of particulate, or filament, or mesh-like configuration. 
     
     
         5 . The aerosol-forming substrate according to  claim 4 , wherein at least one of the first and second susceptor materials is of particulate configuration having an equivalent diameter of 10 μm-100 μm and being distributed within the aerosol-forming substrate. 
     
     
         6 . The aerosol-forming substrate according to  claim 4 , wherein the first and the second susceptor materials are of particulate configuration and are generally homogenously distributed within the aerosol-forming substrate. 
     
     
         7 . The aerosol-forming substrate according to  claim 4 , wherein the first and second susceptor materials are of particulate configuration and are arranged in heaped formation at different locations within the aerosol-forming substrate, the first susceptor material being arranged in a central region of the aerosol-forming substrate, preferably along an axial extension thereof, and the second susceptor material being arranged in peripheral regions of the aerosol-forming substrate. 
     
     
         9 . The aerosol-forming substrate according to  claim 4 , wherein at least one of the first and second susceptor materials is of filament configuration and is arranged within the aerosol-forming substrate. 
     
     
         10 . The aerosol-forming substrate according to  claim 9 , wherein the at least one of the first and second susceptor materials which is of filament configuration, is arranged in a central region of the aerosol-forming substrate, preferably extending along an axial extension thereof. 
     
     
         11 . The aerosol-forming substrate according to  claim 4 , wherein at least one of the first and second susceptor materials is of mesh-like configuration and is arranged within the aerosol-forming substrate or at least partly forms an encasement for the solid material. 
     
     
         12 . The aerosol-forming substrate according to  claim 4 , wherein the first and second susceptor materials are assembled to form a mesh-like structural entity which is arranged within the aerosol-forming substrate or at least partially forms an encasement for the solid material. 
     
     
         13 . The aerosol-forming substrate according to  claim 1 , wherein the aerosol-forming substrate is attached to a mouthpiece, which optionally comprises a filter plug. 
     
     
         14 . An aerosol-delivery system comprising an inductive heating device and an aerosol forming substrate according to  claim 1 . 
     
     
         15 . An aerosol-delivery system according to  claim 14 , wherein the inductive heating device is provided with an electronic control circuit, which is adapted for a successive or alternating heating of the first and second susceptor materials of the aerosol-forming substrate. 
     
     
         16 . The aerosol-forming substrate according to  claim 2 , wherein the second Curie-temperature of the second susceptor material does not exceed 370° C. 
     
     
         17 . The aerosol-forming substrate according to  claim 5 , wherein the first and the second susceptor materials are of particulate configuration and are generally homogenously distributed within the aerosol-forming substrate. 
     
     
         18 . The aerosol-forming substrate according to  claim 5 , wherein the first and second susceptor materials are of particulate configuration and are arranged in heaped formation at different locations within the aerosol-forming substrate, the first susceptor material being arranged in a central region of the aerosol-forming substrate, preferably along an axial extension thereof, and the second susceptor material being arranged in peripheral regions of the aerosol-forming substrate. 
     
     
         19 . The aerosol-forming substrate according to  claim 2 , wherein at least one of the first and second susceptor materials is one of particulate, or filament, or mesh-like configuration. 
     
     
         20 . The aerosol-forming substrate according to  claim 3 , wherein at least one of the first and second susceptor materials is one of particulate, or filament, or mesh-like configuration.