A composition comprising an aerosol-generating material and sorbent material, and uses thereof

Abstract

The invention relates to a composition comprising an aerosol-generating material comprising a dried precursor material comprising an extract from a flavour- and/or active-containing plant material and optionally an aerosol-former material, and a sorbent material. The compositions may be used to generate an aerosol. For example, the compositions may be used in combustible or non-combustible aerosol-provision systems. The invention also relates to aerosol-provision systems comprising the composition, and methods of providing a composition.

1 . A composition comprising:
 an aerosol-generating material comprising a dried precursor material comprising an extract from a flavour- and/or active-containing plant material, and   a sorbent material.   
     
     
         2 . A composition as claimed in  claim 1 , wherein the sorbent material is more hygroscopic than the aerosol-generating material. 
     
     
         3 . A composition as claimed in  claim 1 , wherein the sorbent material holds the absorbed or adsorbed moisture at a temperature of up to about 100° C. 
     
     
         4 . A composition as claimed in  claim 1 , wherein the sorbent material comprises one or more selected from the group consisting of: silica gel, molecular sieves, activated carbon, zeolites, sodium acrylic acid, and simple salts, carbonates and hydroxides, such as alkaline earth metal or alkali metal salts, carbonates and hydrides, for example calcium chloride, sodium chloride, magnesium sulphate, potassium carbonate and sodium hydroxide 
     
     
         5 . A composition as claimed in  claim 1 , wherein the sorbent material is present on the surface of the aerosol-generating material. 
     
     
         6 . A composition as claimed in  claim 5 , wherein the sorbent material forms an incomplete coating surrounding the aerosol-generating material. 
     
     
         7 . A composition as claimed in  claim 1 , wherein particles of the sorbent material are mixed with particles of the aerosol-generating material. 
     
     
         8 . A composition as claimed in  claim 1 , wherein the aerosol-generating material is in the form of particles or granules. 
     
     
         9 . A composition as claimed in  claim 8 , wherein the particles or granules of the aerosol-generating material have an average size of from about 1 μm to about 3 mm. 
     
     
         10 . A composition as claimed in  claim 1 , wherein the aerosol-generating material is in the form of agglomerates or tablets formed from particles. 
     
     
         11 . A composition as claimed in  claim 10 , wherein the agglomerates or tablets of the aerosol-generating material have an average size from about 3 mm to about 20 mm. 
     
     
         12 . A composition as claimed in  claim 10 , wherein the sorbent material is included in the agglomerates or tablets of the aerosol-generating material. 
     
     
         13 . A composition as claimed in  claim 1 , wherein the aerosol-generating material comprises an aerosol-former material. 
     
     
         14 . A composition as claimed in  claim 1 , the precursor material comprising from about 10 to about 95% by weight extract from a flavour- or active-containing plant material. 
     
     
         15 . A composition as claimed in  claim 1 , the precursor material comprising from about 1 to about 36 wt % aerosol-former material. 
     
     
         16 . A composition as claimed in  claim 1 , the precursor material comprising from 0 to about 40% by weight of an excipient. 
     
     
         17 . A composition as claimed in  claim 1 , the aerosol-generating material comprising from about 45 to about 99% by weight dried extract from the flavour- or active-containing plant material. 
     
     
         18 . A composition as claimed in  claim 1 , the aerosol-generating material comprising from about 1 to about 34% by weight aerosol-former material. 
     
     
         19 . A composition as claimed in  claim 1 , the aerosol-generating material comprising from 0 to about 25% by weight of an excipient. 
     
     
         20 . A composition as claimed in  claim 1 , wherein the plant material is selected from the group consisting of tobacco,  eucalyptus , star anise, cocoa and hemp. 
     
     
         21 . A composition as claimed in  claim 1 , wherein the extract from a flavour- or active-containing plant material is an aqueous extract. 
     
     
         22 . A composition as claimed in  claim 1 , wherein the extract from a flavour- or active-containing plant material is an aqueous tobacco extract. 
     
     
         23 . A composition as claimed in  claim 1 , the aerosol-generating material comprising from about 40 to about 99% by weight tobacco solids. 
     
     
         24 . A composition as claimed in  claim 1 , the aerosol-generating material having a water content of no more than about 5%. 
     
     
         25 . A composition as claimed in  claim 1  for use in an aerosol provision system. 
     
     
         26 . An article comprising an aerosol-generating material comprising a dried precursor material comprising an extract from a flavour- and/or active-containing plant material, and a sorbent. 
     
     
         27 . An article, comprising the composition as claimed in  claim 1 . 
     
     
         28 . An article as claimed in  claim 26 , wherein the aerosol-generating material and the sorbent are provided separately within the article. 
     
     
         29 . A non-combustible aerosol-provision system comprising a composition as claimed in  claim 1 . 
     
     
         30 . A pack comprising an article comprising an aerosol-generating material comprising a dried precursor material comprising an extract from a flavour- and/or active-containing plant material, and a sorbent. 
     
     
         31 . A pack as claimed in  claim 30 , wherein the sorbent is separate from the article. 
     
     
         32 . A pack as claimed in  claim 31 , wherein the sorbent is provided in a separate item, such as a sachet or sheet. 
     
     
         33 . A pack as claimed in  claim 32 , wherein the sorbent is provided in a packaging material that is removed from the article before the article is used to generate an aerosol. 
     
     
         34 . A method of providing a composition comprising drying a precursor material comprising an extract from a flavour- and/or active-containing plant material and an aerosol-former material to form an aerosol-generating material, and adding a sorbent material to the aerosol-generating material. 
     
     
         35 . A method as claimed in  claim 34 , wherein the precursor material is dried by spray-drying or freeze-drying. 
     
     
         36 . A method as claimed in  claim 34 , wherein the sorbent is added in the form of a non-continuous coating on the surface of the aerosol-generating material. 
     
     
         37 . A method as claimed in  claim 36 , wherein the adsorbent material is mixed with the dried aerosol-generating material. 
     
     
         38 . A method as claimed in  claim 34 , wherein the aerosol-generating material is agglomerated.