Smoking article with dual heat-conducting elements and improved airflow
A smoking article is provided, including a combustible heat source having opposed front and rear faces; an aerosol-forming substrate downstream of the rear face; a first heat-conducting element circumscribing a rear portion of the combustible heat source and at least a front portion of the aerosol-forming substrate; a second heat-conducting element around at least a portion of the first heat-conducting element, wherein at least part of the second heat-conducting element is radially separated from the first heat-conducting element; and one or more first air inlets around a periphery of the aerosol-forming substrate.
1. A smoking article, comprising:
a combustible heat source having opposed front and rear faces, wherein the combustible heat source is a blind combustible heat source;
an aerosol-forming substrate downstream of the rear face of the combustible heat source;
a non-combustible substantially air impermeable barrier disposed between the rear face of the combustible heat source and the aerosol-forming substrate;
a mouthpiece downstream of the aerosol-forming substrate;
a transfer element between the aerosol-forming substrate and the mouthpiece;
a first heat-conducting element circumscribing a rear portion of the combustible heat source and at least a front portion of the aerosol-forming substrate;
a second heat-conducting element overlying at least a portion of the first heat-conducting element, wherein at least part of the second heat-conducting element is radially separated from the first heat-conducting element, and wherein the second heat-conducting element extends beyond the first heat-conducting element in a downstream direction and overlies an entire length of the aerosol-generating substrate and an entire length of the transfer element; and
one or more first air inlets around a periphery of the aerosol-forming substrate and being configured to draw air therethrough into the aerosol-forming substrate in a radial direction.
2. The smoking article according to claim 1 , wherein all of the second heat-conducting element is radially separated from the first heat-conducting element.
3. The smoking article according to claim 1 , wherein the first heat-conducting element and the second heat-conducting element are radially separated by a heat-insulative material.
4. The smoking article according to claim 1 , wherein the first heat-conducting element and the second heat-conducting element are radially separated by at least 50 microns.
5. The smoking article according to claim 1 , wherein the second heat-conducting element overlies at least a portion of the combustible heat source.
6. The smoking article according to claim 1 , further comprising an outer wrapper around the second heat-conducting element.
7. The smoking article according to claim 1 , wherein the second heat-conducting element is disposed at an outside of the smoking article, such that the second-heat conducting element is visible on an external surface of the smoking article.
8. The smoking article according to claim 1 , wherein the second heat-conducting element includes a laminate material comprising one or more layers of a heat-conductive material.
9. The smoking article according to claim 1 , wherein the second heat-conducting element comprises one or more layers of a heat-reflective material.
10. The smoking article according to claim 9 , wherein the heat-reflective material is configured to reflect more than 50% of incident radiation.
11. The smoking article according to claim 1 , further comprising one or more second air inlets between the rear face of the combustible heat source and the aerosol-forming substrate.
12. The smoking article according to claim 1 , further comprising one or more aerosol modifying agents downstream of the aerosol-forming substrate.
13. The smoking article according to claim 1 , wherein the second heat-conducting element extends beyond the first heat-conducting element in a downstream direction and radially surrounds the transfer element.
14. A smoking article, comprising:
a combustible heat source having opposed front and rear faces, wherein the combustible heat source is a blind combustible heat source;
an aerosol-forming substrate downstream of the rear face of the combustible heat source;
a non-combustible substantially air impermeable barrier disposed between the rear face of the combustible heat source and the aerosol-forming substrate;
a mouthpiece downstream of the aerosol-forming substrate;
a transfer element between the aerosol-forming substrate and the mouthpiece;
a first heat-conducting element circumscribing a rear portion of the combustible heat source and at least a front portion of the aerosol-forming substrate;
a second heat-conducting element overlying at least a portion of the first heat-conducting element, wherein at least part of the second heat-conducting element is radially separated from the first heat-conducting element, and wherein the second heat-conducting element extends beyond the first heat-conducting element in a downstream direction and overlies an entire length of the aerosol-generating substrate and an entire length of the transfer element; and
one or more first air inlets around a periphery of the aerosol-forming substrate,
wherein the first heat-conducting element and the second heat-conducting element are radially separated by at least 20 microns.
15. A smoking article, comprising:
a combustible heat source having opposed front and rear faces, wherein the combustible heat source is a blind combustible heat source;
an aerosol-forming substrate downstream of the rear face of the combustible heat source;
a non-combustible substantially air impermeable barrier disposed between the rear face of the combustible heat source and the aerosol-forming substrate;
a mouthpiece downstream of the aerosol-forming substrate;
a transfer element between the aerosol-forming substrate and the mouthpiece;
a first heat-conducting element circumscribing a rear portion of the combustible heat source and at least a front portion of the aerosol-forming substrate;
a second heat-conducting element overlying at least a portion of the first heat-conducting element, wherein at least part of the second heat-conducting element is radially separated from the first heat-conducting element, and wherein the second heat-conducting element extends beyond the first heat-conducting element in a downstream direction and overlies an entire length of the aerosol-generating substrate and an entire length of the transfer element; and
one or more first air inlets around a periphery of the aerosol-forming substrate,
wherein the first heat-conducting element and the second heat-conducting element are radially separated by a heat-insulative material.
16. The smoking article according to claim 1 , wherein the second heat-conducting element comprises steel.
17. The smoking article according to claim 1 , wherein the one or more first air inlets are located proximate to the downstream end of the aerosol-forming substrate.
18. The smoking article according to claim 1 , wherein the transfer element comprises at least one open-ended tubular hollow body.