Aerosol-generating substrate for smoking articles
Strands of homogenized tobacco material include at least one aerosol former, An aerosol-generating substrate includes a plurality of those strands of homogenized tobacco material. A smoking article may further include the aerosol-generating substrate. Those strands of homogenized tobacco material preferably have a mass-to-surface-area ratio of at least about 0.09 mg/mm 2 and an aerosol former content of between about 12% and about 25% by weight.
1. A strand of homogenized tobacco material comprising at least one aerosol former having a mass-to-surface-area ratio of at least about 0.09 mg/mm 2 and an aerosol former content of between about 12% and about 25% by weight, wherein the homogenized tobacco material has a density of between about 1100 mg/cm 3 and about 1450 mg/cm 3 .
2. A strand of homogenized tobacco material according to claim 1 having a mass-to-surface-area ratio of at least about 0.1 mg/mm 2 .
3. A strand of homogenized tobacco material according to claim 1 having a mass-to-surface-area ratio of less than or equal to about 0.25 mg/mm 2 .
4. A strand of homogenized tobacco material according to claim 1 having an aerosol former content of between about 15% and about 25% by weight.
5. A strand of homogenized tobacco material according to claim 1 further including at least one flavorant in an amount of about 10% by weight or less.
6. An aerosol-generating substrate for a smoking article comprising a plurality of strands of homogenized tobacco material comprising at least one aerosol former having a mass-to-surface-area ratio of at least about 0.09 mg/mm 2 , an aerosol former content of between about 12% and about 25% by weight, and a density of between about 0.5 g/cm 3 and about 1.0 g/cm 3 .
7. An aerosol-generating substrate according to claim 6 wherein the plurality of strands of homogenized tobacco material are aligned substantially parallel to one another within the aerosol-generating substrate.
8. An aerosol-generating substrate for a smoking article including homogenized tobacco material comprising at least one aerosol former having a mass-to-surface-area ratio of at least about 0.09 mg/mm 2 , an aerosol former content of between about 12% and about 25% by weight, and the aerosol-generating substrate having a density of between about 0.5 g/cm 3 and about 1.0 g/cm 3 .
9. A smoking article comprising:
a heat source; and
an aerosol-generating substrate having a plurality of strands of homogenized tobacco material having at least one aerosol former with a mass-to-surface-area ratio of at least about 0.09 mg/mm 2 , an aerosol former content of between about 12% and about 25% by weight, and the aerosol-generating substrate having a density of between about 0.5 g/cm 3 and about 1.0 g/cm 3 .
10. A smoking article according to claim 9 wherein the aerosol-generating substrate is located downstream of the heat source.
11. A smoking article according to claim 10 wherein the heat source is a combustible heat source.
12. A smoking article according to claim 11 further comprising:
a heat-conducting element around and in contact with a rear portion of the combustible heat source and an adjacent front portion of the aerosol-generating substrate.
13. A method of making a smoking article comprising:
forming an aerosol-generating substrate having a plurality of strands of homogenized tobacco material comprising at least one aerosol former having a mass-to-surface-area ratio of at least about 0.09 mg/mm 2 , an aerosol former content of between about 12% and about 25% by weight, and the aerosol-generating substrate having a density of between about 0.5 g/cm 3 and about 1.0 g/cm 3 ; and
incorporating the aerosol-generating substrate in a smoking article.