Immobilized diluents for smoking articles
Immobilized diluents in a smoking article are provided, wherein diluents can be immobilized through absorption and/or adsorption of the diluents into immobilizing materials, such as sorbents like silica gels. By immobilizing diluents, the diluents can be available for vaporization, while still being protected from migration and/or loss of the diluents in a smoking article.
1. A smoking article for an electrical smoking system, the smoking article comprising:
a tobacco rod including,
reconstituted tobacco material, and
an immobilized diluent including,
an aerosol forming agent,
a first sorbent material, the aerosol forming agent absorbed or adsorbed in the first sorbent material, and
a polysaccharide polymer layer coating the immobilized diluents;
and
a filter portion attached to the tobacco rod.
2. The smoking article of claim 1 , wherein the first sorbent material comprises silica gels, molecular sieves, activated carbons, or any combination thereof.
3. The smoking article of claim 1 , wherein the aerosol forming agent is absorbed or adsorbed in the first sorbent material in an amount ranging from 60 wt % to 120 wt % based on a weight of the first sorbent material.
4. The smoking article of claim 1 , wherein the first sorbent material has a surface area of at least 50 m 2 /g.
5. The smoking article of claim 1 , wherein the first sorbent material has a pore volume of 0.1 cc/g to 1.5 cc/g.
6. The smoking article of claim 1 , wherein the aerosol forming agent comprises glycerin, propylene glycol, or both glycerin and propylene glycol.
7. The smoking article of claim 1 , wherein the filter portion comprises at least one cellulose acetate plug.
8. The smoking article of claim 7 , wherein the filter portion further comprises a second sorbent.
9. The smoking article of claim 8 , wherein the second sorbent comprises silica gels, molecular sieves, activated carbons, or any combination thereof.
10. The smoking article of claim 8 , wherein the second sorbent material is different from the first sorbent material.
11. The smoking article of claim 1 , wherein the first sorbent material has dimensions in a range of 0.05 mm to 2.0 mm.
12. The smoking article of claim 1 , wherein the immobilized diluent further includes a flavorant.
13. The smoking article of claim 12 , wherein the flavorant comprises menthol.
14. The smoking article of claim 1 , wherein the first sorbent material is mesoporous, microporous, or macroporous.
15. The smoking article of claim 1 , wherein the immobilized diluent makes up 10 to 30 weight percent of the tobacco rod.