Aerosol-generating article with an insulated heat source

Abstract

An aerosol-generating article is provided, including an aerosol-forming substrate; a combustible heat source; and at least one layer of ceramic paper circumscribing at least a portion of a length of the combustible heat source. The at least one layer of ceramic paper includes a cellulose derivative binder and at least one of: biosoluble fibers, low biopersistent fibers, and fibers comprising at least one of: silicon dioxide, calcium oxide, and magnesium oxide. A method of forming an aerosol-generating article is also provided.

1 .- 13 . (canceled) 
     
     
         14 . An aerosol-generating article, comprising:
 an aerosol-forming substrate;   a combustible heat source; and   at least one layer of ceramic paper circumscribing at least a portion of a length of the combustible heat source,   wherein the at least one layer of ceramic paper comprises a cellulose derivative binder, and at least one of:
 biosoluble fibers, 
 low biopersistent fibers, and 
 fibers comprising at least one of: silicon dioxide, calcium oxide, and magnesium oxide. 
   
     
     
         15 . The aerosol-generating article according to  claim 14 , wherein the at least one layer of ceramic paper comprises less than or equal to about 40 weight percent of cellulose derivative binder. 
     
     
         16 . The aerosol-generating article according to  claim 14 , wherein the at least one layer of ceramic paper comprises fibers comprising an alkaline earth silicate. 
     
     
         17 . The aerosol-generating article according to  claim 14 , further comprising one or more airflow pathways configured such to allow air to be drawn along said pathways through the aerosol-generating article for inhalation by a user. 
     
     
         18 . The aerosol-generating article according to  claim 14 , further comprising one or more non-combustible, substantially air impermeable, barriers between the combustible heat source and the aerosol forming substrate. 
     
     
         19 . The aerosol-generating article according to  claim 18 , wherein the one or more non-combustible, substantially air impermeable, barriers between the combustible heat source and the aerosol-forming substrate comprises a first barrier that abuts one or both of a proximal end of the combustible heat source and a distal end of the aerosol-forming substrate. 
     
     
         20 . The aerosol-generating article according to  claim 17 , wherein the at least one layer of ceramic paper is isolated from the one or more airflow pathways such that air drawn through the aerosol-generating article along the one or more airflow pathways does not directly contact the at least one layer of ceramic paper. 
     
     
         21 . The aerosol-generating article according to  claim 14 , wherein the combustible heat source, the aerosol-forming substrate, and the at least one layer of ceramic paper are arranged such that a temperature of the aerosol-forming substrate does not exceed 375° C. during combustion of the combustible heat source. 
     
     
         22 . The aerosol-generating article according to  claim 14 , wherein the at least one layer of ceramic paper comprises at least about 50 percent by weight of ceramic material. 
     
     
         23 . The aerosol-generating article according to  claim 14 , wherein the at least one layer of ceramic paper has a thickness of between about 0.5 millimeters and about 5 millimeters. 
     
     
         24 . A method of forming an aerosol-generating article according to  claim 14 , the method comprising:
 arranging a combustible heat source to heat an aerosol-forming substrate; and   circumscribing at least a portion of a length of the combustible heat source with at least one layer of ceramic paper comprising a cellulose derivative binder.   
     
     
         25 . The method of forming an aerosol-generating article according to  claim 24 , wherein the circumscribing at least the portion of the length of the combustible heat source with the at least one layer of ceramic paper comprises:
 providing a strip of ceramic paper comprising a cellulose derivative binder having opposing ends,   wrapping the strip around the combustible heat source such that the combustible heat source is circumscribed by the at least one layer of ceramic paper,   overlapping opposing ends of the strip, and   securing together the overlapping opposing ends to secure the at least one layer of ceramic paper to the combustible heat source.   
     
     
         26 . The method of forming an aerosol-generating article according to  claim 24 , wherein circumscribing at least a portion of the length of the combustible heat source with at least one layer of ceramic paper comprises:
 providing a strip ceramic paper comprising a cellulose derivative binder having opposing ends;   applying an layer of adhesive to one side of the strip at least at each of the opposing ends;   arranging the strip with the adhesive layer facing the combustible heat source;   wrapping the strip around the combustible heat source such that the combustible heat source is circumscribed by the at least one layer of ceramic paper;   abutting the opposing ends of the strip without overlapping the opposing ends; and   securing the strip to the combustible heat source with the adhesive layer.