Heated aerosol generating article with air-flow barrier

1. An aerosol-generating article for use with an aerosol-generating device having a heating element, the aerosol-generating article comprising:

an aerosol-forming substrate comprising a gathered sheet of aerosol-forming material;

a breachable air-flow barrier;

a tubular element defining an air-flow passage;

a mouthpiece filter; and

a wrapper circumscribing the aerosol-forming substrate, the breachable air-flow barrier, the tubular element, and the mouthpiece filter to form a rod having a mouth end and a distal end upstream from the mouth end,

the mouthpiece filter being at the mouth end,

the rod being insertable into the aerosol-generating device such that the aerosol-forming substrate is heatable by the heating element,

wherein the breachable air-flow barrier is positioned to substantially prevent air being drawn through the aerosol-forming substrate when a user draws on the mouth end of the rod prior to the rod being inserted into the aerosol-generating device,

wherein the breachable air-flow barrier is disposed upstream of the mouth end but downstream of the aerosol forming substrate, and

wherein the tubular element is disposed between the breachable air-flow barrier and the mouthpiece filter.

2. The aerosol-generating article according to claim 1 , the article having a resistance to draw (RTD) in excess of 1000 mm H 2 O when the breachable air-flow barrier is intact, but between 30 mm H 2 O and 100 mm H 2 O when the breachable air-flow barrier is breached.

3. The aerosol-generating article according to claim 1 , wherein the breachable air-flow barrier comprises a rupturable element spanning a cross-section of the rod to substantially prevent air-flow.

4. The aerosol-generating article according to claim 3 , wherein the rupturable element is configured to be ruptured by physical interaction with a portion of the aerosol-generating device.

5. The aerosol-generating article according to claim 4 , wherein the rupturable element comprises a rupturable septum formed from a foil, a paper, a polymer, or a ceramic.

6. The aerosol-generating article according to claim 1 , wherein the breachable air-flow barrier comprises a fusible septum disposed within the rod.

7. The aerosol-generating article according to claim 6 , wherein the fusible septum is configured to melt when heated by a heating element of the aerosol-generating device.

8. The aerosol-generating article according to claim 6 , wherein the fusible septum is a low melting point wax in a shape of a disc or a plug.

9. The aerosol-generating article according to claim 8 , wherein the low melting point wax is paraffin wax.

10. The aerosol-generating article according to claim 1 , wherein the aerosol-generating article is for an electrically-operated aerosol-generating device having the heating element.

11. The aerosol-generating article according to claim 1 , wherein the rod is insertable into the aerosol-generating device such that the heating element ruptures the breachable air-flow barrier.

12. The aerosol-generating article according to claim 1 , wherein the rod is insertable into the aerosol-generating device such that the heating element is brought into contact with the aerosol-forming substrate.

13. The aerosol-generating article according to claim 1 , wherein the rod is insertable into the aerosol-generating device such that the heating element ruptures the breachable air-flow barrier and the heating element is brought into contact with the aerosol-forming substrate.

14. The aerosol-generating article according to claim 1 , wherein the gathered sheet of aerosol-forming material extends along substantially an entire length of the aerosol-forming substrate and across substantially an entire transverse cross-sectional area of the aerosol-forming substrate.

15. The aerosol-generating article according to claim 1 , wherein the heating element is a heating blade.