SMOKING ARTICLE INCORPORATING A CONDUCTIVE SUBSTRATE
First Claim
1. A resistive heating element comprising:
- a. a substrate comprising an electrically conductive material and at least one carbonaceous additive, wherein the substrate or a part thereof is carbonized; and
b. an aerosol precursor material associated with the carbonized substrate;
wherein the resistive heating element has an electrical resistance of about 15 ohms or less.
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Accused Products
Abstract
The present invention provides a conductive substrate useful for Joule heating, such as in an electronic smoking article. Particularly, the invention provides a resistive heating element formed of a conductive substrate. The conductive substrate comprises an electrically conductive material and a carbonaceous additive, such as a binder material. The conductive substrate is carbonized in that it is subjected to calcining conditions to effectively reduce the carbonaceous additive to its carbon skeleton. It has been found that such carbonized substrate has surprisingly improved resistance properties in relation a substrate of the same formulation that is not carbonized. The carbonized substrate can include an aerosol precursor material. The formed resistive heating element can be included in an electronic smoking article to simultaneously provide resistive heating and aerosol formation with a single, unitary component.
511 Citations
116 Claims
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1. A resistive heating element comprising:
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a. a substrate comprising an electrically conductive material and at least one carbonaceous additive, wherein the substrate or a part thereof is carbonized; and b. an aerosol precursor material associated with the carbonized substrate; wherein the resistive heating element has an electrical resistance of about 15 ohms or less. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 115, 116)
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70. A method of preparing a resistive heating element, the method comprising:
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a. combining an electrically conductive material with at least one carbonaceous additive to form an intermediate substrate; b. heating the intermediate substrate for a defined period of time at a temperature of about 200°
C. or greater to form a carbonized substrate; andc. associating an aerosol precursor material with the carbonized substrate to form the resistive heating element. - View Dependent Claims (83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114)
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Specification