| US 7,600,518 B2 | ||
| Smoking articles and wrapping materials therefor | ||
| Robert Leslie Oglesby, Kernersville, N.C. (US); Alan Benson Norman, Clemmons, N.C. (US); and John Fitzgerald, Winston-Salem, N.C. (US) | ||
| Assigned to R. J. Reynolds Tobacco Company, Winston-Salem, N.C. (US) | ||
| Filed on Apr. 19, 2005, as Appl. No. 11/109,404. | ||
| Prior Publication US 2006/0231114 A1, Oct. 19, 2006 | ||
| Int. Cl. A24D 1/02 (2006.01); A24C 1/42 (2006.01) | ||
| U.S. Cl. 131—365 [131/284] | 33 Claims |
| 1. A wrapping material for a smokable rod of a cigarette, the wrapping material comprising
a base sheet and
an additive material applied to at least one major surface thereof, the additive material comprising alginate and hydroxypropylcellulose
in a pattern comprising at least one band configured to be disposed in a predetermined location when the wrapping material
is assembled to a cigarette, wherein the predetermined location is generally transverse to a longitudinal axis of a cigarette,
and is in communication with smokable material so as to be burned therewith;
wherein the alginate within the additive material makes up at least about 65 percent of the combined weight of the alginate
and hydroxypropylcellulose within the additive material, and the hydroxypropylcellulose within the additive material makes
up at least about 5 percent of the combined weight of the alginate and hydroxypropylcellulose within the additive material;
and
wherein the additive material provides a desirable extinction criteria for a cigarette by providing a diffusion capacity of
a wrapping material region coated by the at least one band that is at least about 0.5 cm/sec and an inherent porosity of less
than 9 CORESTA units.
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