Tobacco flavor unit for electrical smoking article comprising fibrous mat
AssigneePhilip Morris Incorporated
InventorsMary E. Counts, Susan E. Wrenn
Life of this patent
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Abstract
A tobacco flavor unit is provided for use in a smoking article for delivering to a smoker a tobacco flavor substance, the smoking article having electrical heating means disposed in a cavity. The tobacco flavor unit includes a carbon fibrous mat and tobacco flavor medium disposed on the mat for providing for the efficient generation of tobacco flavor substance. The carbon mat includes carbon fibers that are made from a precursor selected from the group consisting of rayon, pitch and polyacrylonitrile. A smoking article incorporating the tobacco flavor unit is also provided.
Claims75
A tobacco product adapted to cooperate with a discrete source of heat, said tobacco product comprising a fibrous carbon mat and a tobacco flavor material disposed along a first surface of said fibrous carbon mat, an opposite surface of said fibrous carbon mat being substantially free of tobacco flavor material, and said fibrous carbon mat having a basis weight in a range between about 6 g/m.sup.2 and 12 g/m.sup.2 and being adapted to receive heat at at least one location along said opposite surface and to transfer a substantial portion of said heat to portions of said tobacco flavor material proximate to said location.
A tobacco flavor unit for use in a smoking article for delivering to a smoker a tobacco flavor substance, the article having an electrical heater, the tobacco flavor unit comprising:
- a carbon fibrous mat comprising carbon fibers at a basis weight of less than or equal to 12 g/m.sup.2, said carbon fibers incorporated into a host matrix, said mat having a first surface and a second surface, the mat adapted to be disposed in a region adjacent the electrical heating means;
- and
- tobacco flavor medium disposed on the first surface of said mat;
- wherein when the electrical heater is activated, a respective fraction of said tobacco flavor medium in thermal transfer relationship with said heater is heated, generating a predetermined quantity of tobacco flavor substance for delivery to the smoker.
A tobacco flavor unit for use in a smoking article for delivering to a smoker a tobacco flavor substance, the article having electrical heating means disposed in a cavity, the tobacco flavor unit comprising:
- a carbon fibrous mat having a first surface and a second surface, the mat adapted to be disposed in a region adjacent the electrical heating means;
- and
- tobacco flavor medium disposed on the first surface of said mat;
- wherein when the electrical heating means is activated, a respective fraction of said tobacco flavor medium in thermal transfer relationship with said heating means is heated, generating a predetermined quantity of tobacco flavor substance for delivery to the smoker;
- wherein the carbon fibrous mat comprises a mat of carbon fibers made from a precursor selected from the group consisting of rayon, pitch and polyacrylonitrile;
- the carbon fibers comprise over 90% by weight carbon;
- the carbon fibrous mat is nonwoven;
- the carbon fibrous mat further includes a binder for bonding together the fibers;
- the binder is selected from the group consisting of polyvinyl alcohol, sugars, starches, modified starches, alginates, cellulose-based adhesives, artificial gums and natural gum;
- the binder is suitable for use in a smoking article;
- and
- wherein the carbon fibers in the mat have a basis weight in the range from about 6 g/m.sup.2 to about 12 g/m.sup.2.
A tobacco flavor unit for use in a smoking article for delivering to a smoker a tobacco flavor substance, the article having electrical heating means disposed in a cavity, the tobacco flavor unit comprising:
- a carbon fibrous mat having a first surface and a second surface, the mat adapted to be disposed in a region adjacent the electrical heating means;
- and
- tobacco flavor medium disposed on the first surface of said mat;
- wherein when the electrical heating means is activated, a respective fraction of said tobacco flavor medium in thermal transfer relationship with said heating means is heated, generating a predetermined quantity of tobacco flavor substance for delivery to the smoker;
- wherein the carbon fibers are incorporated into a host matrix.
A smoking article for delivering to a smoker a tobacco flavor substance, said article comprising:
- a plurality of electrical heaters;
- a source of electrical energy for powering said plurality of heaters;
- control means for applying said electrical energy to said heaters to selectively heat at least one of said plurality of heaters;
- and
- a tobacco flavor unit comprising:
- a carbon fibrous mat having a first surface and a second surface, the mat adapted to be disposed in a region adjacent the plurality of electrical heaters;
- and
- tobacco flavor medium disposed on the first surface of said mat;
- wherein when any one of said plurality of electrical heaters is activated, a respective fraction of said tobacco flavor medium in thermal transfer relationship with said one of said heaters is heated, generating a predetermined quantity of tobacco flavor substance for delivery to the smoker;
- the carbon fibrous mat comprises a mat of carbon fibers made from a precursor selected from the group consisting of rayon, pitch and polyacrylonitrile;
- wherein the carbon fibers comprise over 90% by weight carbon;
- wherein the carbon fibrous mat is nonwoven;
- and the carbon fibrous mat further includes a binder for bonding together the fibers;
- wherein the binder is selected from the group consisting of polyvinyl alcohol, sugars, starches, modified starches, alginates, cellulose-based adhesives. artificial gums and natural gums;
- and the binder is suitable for use in a smoking article;
- and
- wherein the carbon fibers in the mat have a basis weight in the range from about 6 g/m.sup.2 to about 12 g/m.sup.2.
A tobacco flavor unit for use in a smoking article for delivering to a smoker a tobacco flavor substance, the smoking article having electrical heating means disposed in a cavity, the tobacco flavor unit comprising:
- a fibrous mat having a first surface and a second surface, the mat adapted to be disposed in a region adjacent the electrical heating means, wherein said mat comprises a mat of inorganic, thermally stable fibers which are incorporated into a host matrix;
- and
- tobacco flavor medium disposed on the first surface of said mat;
- wherein when the electrical heating means is activated, a respective fraction of said tobacco flavor medium in thermal transfer relationship with said heating means is heated, generating a predetermined quantity of tobacco flavor substance for delivery to the smoker.
Dependencies are inferred from the claim text.