Aerosol-generating article with combustion preventing wrapper

An aerosol-generating article for producing an inhalable aerosol upon heating, the aerosol-generating article comprising:

• a rod of aerosol-generating substrate extending from a rod proximal end to a rod distal end upstream from the rod proximal end, wherein the aerosol-generating substrate comprises at least an aerosol-former, an aerosol former content of the aerosol-generating substrate being at least 10 percent on a dry weight basis;
• a downstream section at a location downstream of the rod of aerosol-generating substrate;
• and
• a wrapper circumscribing at least the rod of aerosol-generating substrate, the wrapper comprising a wrapping base material having a dry basis weight,
• wherein at least a treated portion of the wrapper extending between the rod proximal end and the rod distal end comprises a flame retardant composition comprising one or more flame retardant compounds, such that the treated portion of the wrapper has an overall dry basis weight greater than a dry basis weight of the wrapping base material, and
• wherein the treated portion comprises at least about 2 grams of the one or more flame retardant compounds per square meter of surface area of the treated portion.

A method of manufacturing an aerosol-generating article for generating an inhalable aerosol upon heating, the method comprising:

• providing a continuous rod of aerosol-generating substrate, an aerosol former content of the aerosol-generating substrate being at least 10 percent on a dry weight basis;
• circumscribing the continuous rod of aerosol-generating substrate with a wrapper, the wrapper comprising a wrapping base material having a dry basis weight;
• treating at least a portion of the wrapper with a flame retardant composition comprising one or more flame retardant compounds, so as to provide a treated portion of the wrapper having an overall dry basis weight greater than the dry basis weight of the wrapping base material;
• and
• cutting the treated wrapped continuous rod of aerosol-generating substrate into discrete rods, each discrete rod extending from a discrete rod proximal end to a discrete rod distal end upstream from the discrete rod proximal end, such that in each discrete rod a treated portion of the wrapper comprises at least about 2 grams of the one or more flame retardant compounds per square meter of surface area of the treated portion.