Aerosol-generating article comprising an aerosol-generating film

1. An aerosol-generating article, comprising:

a tubular carrier element defining a longitudinally extending internal cavity; and

a layer of an aerosol-generating film applied to a portion of an inner surface of the tubular carrier element, such that an outer surface of the aerosol-generating film is exposed to the internal cavity of the tubular carrier element,

wherein the aerosol-generating film comprises at least 25 percent by weight of a polyhydric alcohol, and

wherein a thickness of the layer of the aerosol-generating film is between 0.05 millimeter and 1.0 millimeter.

2. The aerosol-generating article according to claim 1 , wherein the aerosol-generating film further comprises at least 10 percent by weight of a cellulose based film-forming agent.

3. The aerosol-generating article according to claim 1 , wherein the aerosol-generating film extends longitudinally from an upstream end of the tubular carrier element for less than about 50 percent of a length of the tubular carrier element.

4. The aerosol-generating article according to claim 1 , wherein a surface area of the outer surface of the aerosol-generating film exposed to the internal cavity is at least about 1 square centimeter.

5. The aerosol-generating article according to claim 1 , wherein the aerosol-generating film is crimped.

6. The aerosol-generating article according to claim 1 , further comprising a flow restriction element within the internal cavity of the tubular carrier element and downstream of the aerosol-generating film.

7. The aerosol-generating article according to claim 6 , wherein the flow restriction element is configured to provide the aerosol-generating article with an RTD of at least about 80 mm WG.

8. The aerosol-generating article according to claim 6 , wherein a longitudinal spacing between the flow restriction element and a downstream end of the aerosol-generating film is at least about 10 percent of a length of the tubular carrier element.

9. The aerosol-generating article according to claim 1 ,

wherein the tubular carrier element further comprises a coating layer comprising aluminum, the coating layer extending over at least a portion of the inner surface of the tubular carrier element, and

wherein the layer of the aerosol-generating film is provided over the coating layer.

10. The aerosol-generating article according to claim 1 , wherein at least one end of the tubular carrier element is sealed by a sealing element.

11. The aerosol-generating article according to claim 10 , further comprising a frangible sealing element at an upstream end of the tubular carrier element, the frangible sealing element being configured to obstruct airflow into and out of the cavity.

12. An aerosol-generating substrate for an aerosol-generating article, the aerosol-generating substrate comprising:

a tubular carrier element defining a longitudinally extending internal cavity; and

a layer of an aerosol-generating film applied to a portion of an inner surface of the tubular carrier element, such that an outer surface of the aerosol-generating film is exposed to the internal cavity of the tubular carrier element,

wherein the aerosol-generating film comprises at least 25 percent by weight glycerin, and

wherein a thickness of the layer of the aerosol-generating film is between 0.05 millimeter and 1.0 millimeter.

13. A method of making an aerosol-generating article, the method comprising the steps of:

providing an aqueous film-forming composition comprising glycerin;

providing a sheet material;

applying the aqueous film-forming composition onto a surface of the sheet material to form a film layer;

drying the film layer to form a layer of an aerosol-generating film comprising at least 25 percent by weight glycerin, wherein a thickness of the layer of the aerosol-generating film is between 0.05 millimeter and 1.0 millimeter; and

rolling the sheet material to form a tubular carrier element defining a longitudinally extending internal cavity and having the layer of the aerosol-generating film applied to a portion of the inner surface of the tubular carrier element.

14. An aerosol-generating system, comprising:

an aerosol-generating article, comprising:

a tubular carrier element defining a longitudinally extending internal cavity, and

a layer of an aerosol-generating film applied to a portion of an inner surface of the tubular carrier element, such that an outer surface of the aerosol-generating film is exposed to the internal cavity of the tubular carrier element, the aerosol-generating film comprising at least 25 percent by weight glycerin and a thickness of the layer of the aerosol-generating film being between 0.05 millimeter and 1.0 millimeter; and

an electrically operated aerosol-generating device comprising a heater and an elongate heating chamber configured to receive the aerosol-generating article so that the aerosol-generating article is heated in the heating chamber.

15. An aerosol-generating system, comprising:

an aerosol aerosol-generating article, comprising:

an aerosol-generating substrate comprising a tubular carrier element defining a longitudinally extending internal cavity, and

a layer of an aerosol-generating film applied to a portion of an inner surface of the tubular carrier element, such that an outer surface of the aerosol-generating film is exposed to the internal cavity of the tubular carrier element, the aerosol-generating film comprising at least 25 percent by weight polyhydric alcohol and a thickness of the layer of the aerosol-generating film being between 0.05 millimeter and 1.0 millimeter; and

an electrically operated aerosol-generating device comprising a heater element configured to heat the aerosol-generating substrate of the aerosol-generating article, the heater element being a heater blade or a heater pin configured to be inserted into the cavity such that the heater blade or the heater pin faces the outer surface of the aerosol-generating film.