JP2022160529A - Smoking article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a smoking article further configured to cooperate to distribute heat received by an aerosol-generating portion from the heat generation portion so as to prevent scorching of the outer wrapping material.

SOLUTION: The smoking article has a lighting end 14 and a mouth end 18 that are opposed. A heat generation portion 40 is disposed about the lighting end. An outer wrapping material is wrapped at least about the heat generation portion 40 and extends toward the mouth end portion so as to define a cylindrical rod. An aerosol-generating portion 61 is disposed within the outer wrapping material and between the heat generation and mouth end portions. The aerosol-generating portion is configured to generate aerosol in response to heat received from the heat generation portion.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2023,JPO&INPIT

Description

FIELD OF THE DISCLOSURE The present disclosure relates to products manufactured or produced from or otherwise incorporating tobacco and intended to be ingested by humans, and more particularly to products that produce smoke by burning tobacco. A segmented smoking article that provides an aerosol with significantly less incomplete combustion and thermal decomposition products compared to tobacco products.

A typical smoking article, such as a cigarette, has a substantially cylindrical rod-like structure and comprises a charge, roll, or column of smokable material, such as shredded tobacco (e.g., in the form of cut filler). surrounded by a wrapper to form a so-called "smokable rod", "tobacco rod" or "cigarette rod". Cigarettes typically have cylindrical filter elements aligned in end-to-end relation to a tobacco rod. Preferably, the filter element comprises plasticized cellulose acetate tow surrounded by a paper material known as "plug wrap". Preferably, the filter element is attached to one end of the tobacco rod using a surrounding wrapping material known as "tipping paper." It has also become desirable to provide holes in the tipping material and plug wrap to dilute the inhaled mainstream smoke with ambient air. A description of cigarettes and their various components can be found in Tobacco Production, Chemistry and Technology, Davis et al. (Eds.) (1999). A traditional type of cigarette is used by the smoker by lighting one end and burning the tobacco rod. The smoker then receives mainstream smoke into his/her mouth by inhaling at the opposite end (eg, filter end or mouth end) of the cigarette. Over the years, efforts have been made to improve the composition, construction and performance of smoking articles. See, for example, the background art described in US Pat. No. 7,753,056 to Borschke et al.

A particular type of cigarette that uses a carbonaceous fuel element is the R.I. J. It is marketed under the brand names "Premier" and "Eclipse" by Reynolds Tobacco Company. See, for example, Chemical and Biological Studies on New Cigarette Prototypes that Heat Install of Burn Tobacco, R.J. J. See Reynolds Tobacco Company Monograph (1988) and Inhalation Toxicology, 12:5, p. 1-58 (2000). In addition, a similar type of cigarette was recently sold by Japan Tobacco Inc. under the brand "Steam Hot One". is sold in Japan by

In recent years, various types of smoking products incorporating carbonaceous fuel elements for heat generation and aerosol formation have been described in the patent literature, with several patent documents documenting the production of tobacco by burning tobacco. It provides a historical perspective on technology related to smoking products that produce aerosols with relatively simple chemical compositions compared to mainstream smoke. For example, Cantrell et al., U.S. Pat. No. 7,647,932; Borschke et al., U.S. Pat. No. 7,836,897; Banerjee et al., U.S. Pat. US Patent No. 8616217, Crooks et al. US Patent No. 8678013, Poget et al. US Patent No. 8915255, Stone et al. Publication No. 2013/0133675, WO 2012/0164077 to Gladden et al., WO 2013/098380 to Raether et al., WO 2013/098405 to Zuber et al., WO 2013/098405 to Zuber et al. WO 2013/098410, Woodcock WO 2013/104914, Roudier et al WO 2013/120849, Mironov WO 2013/120854, Azegami et al WO 2013/162028 and International Publication No. WO 20132/1600112 to Saleem et al., and European Patent Application Publication No. 1808087 to Baba et al. and European Patent Application Publication No. 2550879 to Tsuruizumi et al. Smoking Products and Related Art.

It would be highly desirable to provide smoking articles that demonstrate the ability to provide smokers with the majority of the smoking pleasure of conventional cigarettes without resulting in an aerosol containing appreciable amounts of incomplete combustion and thermal decomposition products. It is thought that

U.S. Pat. No. 7,753,056 U.S. Pat. No. 7,647,932 U.S. Pat. No. 7,836,897 U.S. Pat. No. 8,469,035 U.S. Pat. No. 8,464,726 U.S. Pat. No. 8,616,217 U.S. Pat. No. 8,678,013 U.S. Pat. No. 8,915,255 U.S. Patent Application Publication No. 2012/0042885 U.S. Patent Application Publication No. 2013/0133675 WO2012/0164077 WO2013/098380 WO2013/098405 International Publication No. 2013/098410 WO2013/104914 WO2013/120849 WO2013/120854 WO2013/162028 WO20132/1600112 European Patent Application Publication No. 1808087 EP-A-2550879

Tobacco Production, Chemistry and Technology, Davis et al. (Eds.) (1999) Chemical and Biological Studies on New Cigarette Prototypes that Heat Inside of Burn Tobacco, R.J. J. Reynolds Tobacco Company Monograph (1988) Inhalation Toxicology, 12:5, p. 1-58 (2000)

The above and other needs, in one aspect, are an elongated smoking article having a lighting end and an opposite mouth end, the mouth end portion being disposed at the mouth end; and a heat generating portion positioned proximate to the smoking article. An outer wrapping material is wrapped around at least the heat generating portion and extends toward the mouth end portion to define a cylindrical rod. An aerosol-generating portion is disposed inside the outer wrapping material and between the heat-generating portion and the mouth end portion and is configured to generate an aerosol in response to heat received from the heat-generating portion, the aerosol-generating portion and the heat-generating portion , the aerosol-generating portion is further configured to cooperate to distribute heat received from the heat-generating portion in a manner that prevents scorching of the outer wrapping material.

Thus, aspects of the present disclosure provide smoking articles, particularly rod-shaped or elongated smoking articles such as cigarettes. The smoking article includes a lighting end (ie, upstream end) and a mouth end (ie, downstream end) located respectively at opposite ends of the smoking article. The smoking article further includes an aerosol-generating system comprising (i) a heat-generating region, portion or segment, and (ii) an aerosol-generating region, portion or segment located downstream of the heat-generating segment. The heat generating segment includes a relatively short (longitudinally extending) heat source or fuel element (ie, heat generating element) of material such as a relatively clean burning carbonaceous material. The aerosol-generating segment most preferably comprises a substrate region, which in certain embodiments comprises pellets or beads formed from tobacco disposed within a substrate cavity. Alternatively, for example, the substrate region comprises a material comprising a reconstituted type of tobacco (eg, shredded cast sheet type material). The substrate cavity or region in which the substrate material is disposed is preferably defined along the longitudinally extending length of the smoking article by a metal foil (e.g. heat conducting) layer or strip laminated to a paper type wrapping material. surrounded by A substrate at least partially composed of tobacco serves as the carrier and source of the aerosol-forming material.

In certain aspects, the present disclosure provides a mouth end segment, region or portion located at the mouth end and a tobacco rod segment, region or portion located between the lighting end and the mouth end portion ( Alternatively, other suitably configured segments). The aerosol generating system is arranged in a segment located between the heat generating segment and the mouth end portion. That is, the aerosol-generating segment is positioned longitudinally adjacent to a heat-generating portion or segment located at the firing end, and these two segments dissipate the heat generated by the combustion of the components of the heat-generating segment into the aerosol-generating segment. It is in a heat exchange relationship so as to act on the aerosol-forming components to effect the production of an aerosol. The longitudinally extending outer surfaces of the heat generating segment and the aerosol generating segment are surrounded by an outer wrapping material to provide a rod attached to the mouth end segment. A layer of thermally conductive material is positioned directly beneath the outer wrapping material to provide an interior surface outside the aerosol-generating segment. The thermally conductive layer most preferably overlies the outer longitudinal surface of the region of the heat generating segment adjacent the aerosol-generating segment, and the thermally conductive layer optionally overlies the outer longitudinal surface of the region of the tobacco rod segment adjacent the aerosol-generating segment. Can overlap surfaces. Certain materials within the aerosol-generating segment generate an aerosol in response to the heat produced by the combusting fuel elements of the exothermic segment.

In certain aspects, the fuel element or heat source of the heat generation segment can comprise a material that can be characterized as a carbonized or pyrolyzed material derived from the carbonized or pyrolyzed cotton material. In this regard, upon consumption of the smoking article, the fuel element/heat source is ignited to sustain combustion (i.e., smoldering) and produce sufficient heat to operate the aerosol-generating segment and generate aerosol; However, it may be preferable and/or desirable not to emit flames. As such, aspects of the present disclosure may relate to, for example, fuel elements/heat sources configured or arranged to facilitate easy ignition or ignitability. In some cases, existing fuel elements/heat sources of conventional materials can be optimized to produce the desired ignition/ignitability of the smoking article. In other cases, additives (i.e., test carbon or cotton linters) and/or other substances such as catalysts are added to existing fuel elements/elements composed of conventional materials to enhance ignition/ignitability. It can be taken into the heat source. Representative aspects of such fuel elements/heat sources are disclosed, for example, in Nordskog et al., US patent application Ser. No. 14/755,205.

In certain embodiments, the substrate region (aerosol-generating system) comprises tobacco forms that form tobacco smoke exhibiting desirable sensory characteristics. For example, the substrate region may be (i) a pellet or bead consisting of tobacco and serving as a carrier for an aerosol-forming material such as glycerin (i.e., the aerosol-forming material is contained in or otherwise incorporated into the beads/pellet). or may be brought into contact with the beads/pellets and sealed to the beads/pellets by a gelling agent/sealant to maintain the integrity of the aerosol-forming material with the beads/pellets until exposed to heat in use. and (ii) tobacco forms that form tobacco smoke exhibiting desired sensory characteristics. Alternatively, for example, the substrate region comprises (i) a cast sheet type strip or portion of reconstituted tobacco material that acts as a carrier for an aerosol-forming material such as glycerin, and (ii) tobacco smoke exhibiting desired sensory characteristics. can consist of a mixture with tobacco forms forming In certain embodiments, the substrate region/aerosol-generating system, either individually or in conjunction with the heat-generating segments, is configured to more uniformly or efficiently transfer and distribute heat from the heat-generating segments to the substrate region/aerosol-generating system. Can be configured. Preferably, such improved uniformity or efficiency in the transfer and distribution of heat from the heat generating segment towards the substrate area/aerosol generating system advantageously reduces, minimizes or eliminates scorching of the outer wrapping material of the smoking article. do. Further, improved uniformity or efficiency in the transfer and distribution of heat from such exothermic segments towards the substrate region/aerosol-generating system can reduce scorching of the substrate region/aerosol-generating system itself, or the effect of a user's inhalation. It can at least help reduce or minimize the adverse sensory effects caused by scorching of the substrate to the aerosol experienced.

Accordingly, this disclosure includes, but is not limited to, the following embodiments.

Embodiment 1: An elongated smoking article having a lighting end and an opposite mouth end, said smoking article having a mouth end portion located at the mouth end and proximate the lighting end. an outer wrapping material wrapped around at least the heat generating portion and extending toward the mouth end portion so as to define a cylindrical rod; an aerosol-generating portion disposed between the mouth end portion and configured to generate an aerosol in response to heat received from the heat-generating portion, the aerosol-generating portion and the heat-generating portion being configured such that the aerosol-generating portion generates heat; A smoking article further configured to cooperate to distribute heat received from the portion so as to prevent scorching of the outer wrapping material.

Embodiment 2: The aerosol-generating portion comprises a rod member having a length and a maximum diameter, the rod member being a right circular cylinder having a length and maximum diameter equal to the length and maximum diameter of the rod member, respectively. The smoking article of any of the above or below embodiments or combinations thereof, wherein the smoking article has a surface area greater than the surface area of the smoking article.

Embodiment 3: The smoking article of any embodiment above or below, or combinations thereof, wherein the aerosol-generating portion comprises a grooved rod member.

Embodiment 4: The smoking article of any preceding or following embodiment or combinations thereof, wherein the grooved rod member defines a channel extending longitudinally therethrough.

Embodiment 5: The smoking of any preceding or following embodiment or combinations thereof, wherein the grooved rod member is extruded from a mixture comprising ground tobacco, calcium carbonate, binder, glycerin, water, and flavorant. product.

Embodiment 6: Any or those embodiments above or below, wherein the aerosol-generating portion comprises an aerosol-generating element surrounded by a wrapping material, the wrapping material being located between the aerosol-generating element and the outer wrapping material A combination smoking article.

Embodiment 7: The packaging material is a paper-foil sheet laminate, a paper-foil-paper sheet laminate, a paper-foil-tobacco sheet laminate, a non-woven graphite sheet, a graphene sheet, a graphene-foil sheet laminate, a graphene- Foil-paper sheet laminate, paper-graphene sheet laminate, graphene ink imprinted on paper sheet, graphene ink imprinted on foil sheet, carbon nanotubes engaged in paper sheet or foil sheet, paper sheet or fullerenes associated with a sheet of foil; and graphene associated with a sheet of paper or a sheet of foil.

Embodiment 8: The smoking article of any preceding or following embodiment or combinations thereof, wherein the graphene ink is imprinted on the paper or foil sheet according to a continuous or discontinuous pattern.

Embodiment 9: Any of the preceding or following embodiments or combinations thereof, wherein the paper sheet comprises a tobacco wrapper sheet and the tobacco sheet comprises an extruded tobacco sheet, a cast tobacco sheet, or a reconstituted tobacco sheet smoking goods.

Embodiment 10: The smoking article of any of the embodiments above or below, or combinations thereof, wherein the foil sheet comprises a continuous foil sheet or discrete foil strips.

Embodiment 11 The smoking article of any preceding or following embodiment or combination thereof, further comprising a tobacco portion positioned inside the outer wrapping material and between the heat generating portion and the aerosol generating portion.

Embodiment 12: The smoking article of any preceding or following embodiment or combination thereof, further comprising a tobacco portion positioned inside the outer wrapping material and between the aerosol-generating portion and the mouth end portion.

Embodiment 13: A nonwoven graphite sheet or graphite and graphene nonwoven wrapped around a portion of the exothermic portion and around a portion of the aerosol-generating portion inside the outer wrapping material and extending toward the mouthpiece end portion. The smoking article of any of the embodiments above or below, or combinations thereof, further comprising a composite sheet.

Embodiment 14: The smoking article of any embodiment above or below, or combinations thereof, wherein the nonwoven graphite sheet is laminated with an outer wrapping material.

Embodiment 15: Further comprising a metal foil sheet laminated with the outer packaging material with an adhesive material therebetween, the adhesive material comprising a portion of aluminum hydroxide, the metal foil sheet being inside the outer packaging material. A smoking article of any of the preceding or following embodiments, or combinations thereof, wrapped around the heat generating portion and a portion of the aerosol generating portion and extending toward the mouth end portion.

Embodiment 16: The smoking article of any preceding or following embodiment or combination thereof, wherein the outer wrapping material comprises an aluminum hydroxide portion, a magnesium hydroxide portion, or a calcium carbonate portion.

Embodiment 17: Any of the above or below, further comprising a fiberglass sheet wrapped inside the outer wrapping material around the exothermic portion and around a portion of the aerosol-generating portion and extending toward the mouth end portion. A smoking article of any embodiment or combinations thereof.

Embodiment 18: Further comprising a thermally conductive material engaged with the outer wrapping material, the thermally conductive material being disposed inside the outer wrapping material and at least partially wrapping around the heat generating portion in the radial direction and The smoking article of any of the embodiments above or below, or combinations thereof, wherein <RTIgt;extends</RTI> from the heat-generating portion to the aerosol-generating portion.

Embodiment 19: The thermally conductive material is a conductive ink imprinted onto the outer packaging material, a metal layer deposited onto selected portions of the outer packaging material, graphene engaged to the outer packaging material, or an outer The smoking article of any of the embodiments above or below, or combinations thereof, comprising a carbon material engaged with selected portions of the wrapping material.

Embodiment 20: The aerosol-generating portion is a cast sheet of tobacco material in the form of cut filler, a sheet of reconstituted tobacco material in the form of cut filler, a cut filler tobacco material treated with glycerin, an aerosol-forming bead, a ceramic comprising glycerin Cast sheets of non-tobacco materials in the form of cut fillers, fiberglass mats containing tobacco-derived nicotinic substances, foil sheets coated with aerosol-forming materials, gathered paper containing tobacco-derived nicotinic substances, tobacco-derived nicotinic substances. and combinations thereof.

Embodiment 21: The smoking article of any preceding or following embodiment or combinations thereof, wherein the glycerin-treated cut filler tobacco material comprises between about 5% and about 25% glycerin.

Embodiment 22: The aerosol-generating portion includes a first portion and a second portion, the first portion and the second portion being disposed continuously between the exothermic portion and the mouth end portion A smoking article of any of the above or below embodiments or combinations thereof.

Embodiment 23: The aerosol-generating portion comprises a first portion and a second portion, wherein the first portion of the aerosol-generating portion is composed of a different material than the second portion of the aerosol-generating portion, as described above. or a smoking article of any of the following embodiments or combinations thereof.

Embodiment 24: The aerosol-generating portion comprises a first portion and a second portion, wherein the first and second portions are combined to form a single aerosol-generating component, as described above or below. or combinations thereof.

Embodiment 25: The aerosol-generating portion comprises a porous ceramic rod member defining at least one conduit, the at least one conduit extending longitudinally through the porous ceramic rod member, as described above or below. A smoking article of any of the embodiments or combinations thereof.

Embodiment 26: The smoking article of any preceding or following embodiment or combination thereof, wherein the porous ceramic rod member comprises an aerosol forming agent, flavorant, or tobacco extract engaged to the porous ceramic rod member. .

Embodiment 27 The smoking article of any of the preceding or following embodiments or combinations thereof, wherein the aerosol-forming agent comprises glycerin and tobacco extract, and wherein the tobacco extract comprises tobacco-derived nicotine.

Embodiment 28: Any embodiment described above or below, wherein the porous ceramic rod member defines a plurality of longitudinally extending open channels angularly spaced around the outer surface of the porous ceramic rod member. Smoking articles in any form or combination thereof.

Embodiment 29: As described above or below, wherein the aerosol-generating portion is composed of aerosol-forming beads disposed continuously with respect to the heat-generating portion and includes a non-tobacco plug member disposed between the beads and the mouth end portion. or combinations thereof.

Embodiment 30: Any of the embodiments above or below, wherein the aerosol-generating portion comprises a plurality of rod members extending parallel to each other, wherein the rod members are composed of tobacco, non-tobacco, or ceramic materials or Smoking articles of their combination.

Embodiment 31: The heat generating portion comprises a heating element comprised of a carbonized or pyrolyzed material comprising a flammability enhancing material selected from the group consisting of carbon, cotton linters, glass microspheres, catalysts, and combinations thereof. A smoking article of any of the above or below embodiments or combinations thereof.

Embodiment 32: Further comprising an overwrap material wrapped around at least the outer wrapping material wrapped around at least the heat generating portion, the overwrap material being embossed at least partially away from the outer wrapping material A smoking article of any of the above or below embodiments or combinations thereof.

Embodiment 33: Further comprising a thermochromic ink material interacting with the outer wrapping material, wherein the thermochromic ink provides a visual indicia in response to the outer wrapping material exceeding a temperature threshold. A smoking article of any of the above or below embodiments or combinations thereof, wherein the smoking article comprises:

These and other features, aspects and advantages of the present disclosure will become apparent from an understanding of the following detailed description in conjunction with the accompanying drawings briefly depicted below. will be. The present disclosure may extend any combination of two, three, four or more features or components described in this disclosure or claimed in any one or more of such features or configurations. This includes regardless of whether the elements are explicitly combined or otherwise recited in the description or claims of a particular embodiment herein. The present disclosure is intended to be understood as a whole, and thus any separable feature or element of the disclosure may be construed as part of its aspects and components, unless otherwise apparent from the context of the disclosure. Any of the embodiments should be considered as intended, ie combinable.

Having generally described the present disclosure, reference is now made to the accompanying drawings, which are not necessarily drawn to scale.

1 schematically illustrates a longitudinal cross-sectional view of an exemplary smoking article according to one aspect of the present disclosure; FIG. 1 schematically illustrates a longitudinal cross-sectional view of a representative disassembled smoking article according to another aspect of the present disclosure; FIG. 1 schematically illustrates a longitudinal cross-sectional view of a representative disassembled smoking article according to yet another aspect of the present disclosure; FIG. 1 schematically illustrates an aerosol-generating substrate element according to another aspect of the present disclosure; 1 schematically illustrates an aerosol-generating substrate element according to another aspect of the present disclosure;

The present disclosure will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all aspects of the disclosure are shown. Indeed, this disclosure may be embodied in many different forms and should not be construed as limited to the aspects set forth herein, but rather those aspects may vary according to the law to which this disclosure applies. are presented to meet the requirements of Like numbers refer to like elements throughout.

FIG. 1 illustrates a representative smoking article 10 in the form of a cigarette according to one aspect of the present disclosure. Preferably, the smoking article 10 has the general size, shape and general appearance of a filter cigarette. The smoking article 10 has a rod-like shape and includes a lighting end 14 and a mouth end 18 . A longitudinally extending generally cylindrical heat generating segment 35 is disposed at the firing end 14 . The heat generating segment 35 includes a heat source 40 surrounded by thermal insulation 42 , the heat source 40 being most preferably coaxially surrounded by an outer wrapping material 45 . Heat source 40 is preferably configured to be activated by direct ignition of firing end 14 . That is, the heat source or fuel element is designed to be ignited and burned or smoldered to produce heat. Smoking article 10 further includes a filter segment 55 located at the opposite end (ie, mouth end 18) and an aerosol-generating segment 61 located between the filter segment and the heat source.

Heat generating segment 35 most preferably has a generally cylindrical shape and includes a combustible fuel element 40 comprising a combustible carbonaceous material. Such combustible carbonaceous materials generally have a high carbon content. Preferred carbonaceous materials are composed primarily of carbon, typically greater than about 60%, generally greater than about 70%, often greater than about 80%, and often greater than about 90%, on a dry weight basis. % carbon content. Such combustible fuel elements include components other than combustible carbonaceous materials (e.g., tobacco components such as powdered tobacco or tobacco extracts; flavoring agents; salts such as sodium chloride, potassium chloride, and sodium carbonate; heat; powdered calcium carbonate; alumina granules; ammonia sources such as ammonia salts; and/or binders such as guar gum, ammonium alginate, and sodium alginate). A typical fuel element, for example, has a length of about 12 mm and an overall outer diameter of about 4.2 mm. Typical fuel elements can be extruded or compounded using crushed or powdered carbonaceous materials, on a dry weight basis, greater than about 0.5 g/cm ³ and often have densities greater than about 0.7 g/cm ³ , and more often greater than about 1 g/cm ³ .

Layered insulation 42 may be constructed of glass filaments or fibers. Insulation 42 can act as a jacket to help keep heat source 40 securely in place within smoking article 10 (i.e., heat source and outer wrapping material to secure the heat source to the inside of the outer wrapping material). material). Preferably, the insulation is provided in the form of a non-woven mat of glass filaments. The insulation 42 may be provided, for example, as a multi-layer component including an inner layer or mat 67 of nonwoven glass filaments, an intermediate layer of reconstituted tobacco paper 68, and an outer layer of nonwoven glass filaments 69. can. These layers may be arranged in concentric circles and each may cover and/or surround the heat source in a continuous overlapping fashion.

Preferably, both ends of heat generating segment 35 are open to expose at least heat source 40 and insulation 42 at firing end 14 . The heat source 40 and the surrounding insulation 42 are arranged so that the length of both materials is coextensive (i.e., the ends of the insulation 42 are flush with the respective ends of the heat source 40, especially at the downstream ends of the heat generating segments). ) can be configured to Optionally, although not necessarily preferably, the insulation 42 can extend slightly beyond either or both ends of the heat source 40 (eg, by more than about 0.5 mm to about 2 mm). . Additionally, the heat and/or heated air generated when the lighting end 14 is lit during use of the smoking article 10 passes through the heat source 40 itself (i.e., heat source 40 ) as the smoker draws on the mouth end 18 . The heat generating segments 35 can be easily passed through the longitudinal channels extending through the heat generating segments 35 ) and/or longitudinally through the insulation 42 .

Preferably, the outer wrapping material 75 covers the outermost longitudinally extending surface of the lighting end 14 of the smoking article 10 and surrounds the insulation 42 . The outer wrapping material 75 is typically made of, for example, R.I. J. A wrapper material, such as the type of wrapper material used as wrapper material around the thermal insulation area of the heat source segment of cigarettes marketed by Reynolds Tobacco Company under the designations "Premier" and "Eclipse". As such, "outer wrapping material 75" may also be referred to as "outer wrapping paper 75" to indicate such aspects, but outer wrapping material 75 is not limited to wrapping paper material.

The exothermic segment 35 is preferably positioned so that one end is located at or proximate to the extreme firing end 14 and is axially aligned in end-to-end serial relationship with the downstream aerosol-generating segment 61, preferably abut each other, preferably with no barriers (other than open air spaces) between them. The proximity of the heat generating segment 35 to the firing end 14 provides direct ignition of the heat source 40 of the heat generating segment 35 .

The cross-sectional shape and dimensions of the exothermic segment 35 prior to combustion in use may vary. Preferably, the cross-sectional area of fuel element/heat source 40 constitutes about 10% to about 35%, often about 15% to about 25%, of the total cross-sectional area of heat generating segment 35, while the outer or surrounding region The cross-sectional area of heat generating segment 35 (including insulation 42 and associated outer wrapping material) constitutes about 65% to about 90%, often about 75% to about 85%, of the total cross-sectional area of heat generating segment 35 . For example, for a cylindrical smoking article 10 having a circumference of about 24 mm to about 26 mm, a typical fuel element/heat source 40 will be about 2.5 mm to about 5 mm, often about 3 mm to about 4.5 mm. It has a generally circular cross-sectional shape with an outer diameter of .

The components of the exothermic segment can vary. One component of the heat generating segment is the fuel element. Suitable fuel elements typically include carbonaceous materials with high carbon content and may also include components such as graphite and/or alumina. Carbonaceous fuel elements include the types of components and constructions incorporated into cigarettes marketed under the brands "Premier," "Eclipse," and "Steam Hot One." Additionally, representative types of heat generating segments, fuel element characteristics, their representative components, designs, and configurations, as well as practices and methods for manufacturing those heat generating segments and their fuel elements, are described in Banerjee et al. Clearman et al., U.S. Pat. No. 4,756,318; Clearman et al., U.S. Pat. No. 4,881,556; Clearman et al., U.S. Pat. US Pat. No. 5,027,837 to Clearman et al.; US Pat. No. 5,067,499 to Banerjee et al.; US Pat. No. 5,076,297 to Farrier et al.; US Pat. U.S. Patent No. 5,105,831; White et al., U.S. Patent No. 5,129,409; Best et al., U.S. Patent No. 5,148,821; Clearman et al., U.S. Patent No. 5,156,170; US Patent No. 5,211,684 to Shannon et al.; US Patent No. 5,247,947 to Clearman et al.; US Patent No. 5,345,955 to Clearman et al.; US Patent No. 5,461,879 to Barnes et al.; U.S. Patent No. 5,469,871; Riggs, U.S. Patent No. 5,551,451; Meiring et al., U.S. Patent No. 5,560,376; Meiring et al., U.S. Patent No. 5,706,834; U.S. Patent No. 7,836,897 to Borschke et al.; U.S. Patent No. 8,617,263 to Banerjee et al.; and U.S. Patent No. 8,678,013 to Crooks; U.S. Patent Application Publication No. 2007/0215168 to Stone et al.; U.S. Patent Application Publication No. 2012/0042885 to Stone et al.; U.S. Patent Application Publication No. 2013/0269720 to Stone et al.; It is described in published application No. 2015/0083150. See also the construction of fuel elements and their components of the type described in US Pat. No. 4,819,655 to Roberts et al. and US Patent Application Publication No. 2009/0044818 to Takeuchi et al.

Certain fuel elements may include high carbon content carbonaceous materials obtained from carbonized or pyrolyzed cotton-containing fibers (eg, cotton linters). A description of carbonized or pyrolyzed cotton linter materials and how and methods of incorporating these materials into smoking articles, carbonized smoking materials, and fuel elements can be found, for example, in U.S. Pat. No. 4,219,031 to Rainer et al. U.S. Patent No. 4,920,990 to Lawrence et al.; U.S. Patent No. 5,007,440 to Robinson et al.; U.S. Patent No. 5,060,673 to Lehman; No. 5,211,684; and Banerjee et al., US Pat. No. 8,119,555. The fuel elements of the heat generating segment are most preferably surrounded or otherwise covered by thermal insulation or other suitable material. Insulation may be constructed and used to support, maintain and retain the fuel element in place within the smoking article. Additionally, the insulation can be configured to facilitate the passage of inhaled air and aerosols. Suitable insulation assemblies are incorporated in types of cigarettes marketed under the brands "Premier", "Eclipse" and "Steam Hot One". Additionally, examples of insulation materials, components of insulation assemblies, representative insulation assembly configurations in heat generating segments, packaging materials for insulation assemblies, and practices and methods for manufacturing these components and assemblies are found in Pryor. Hancock et al., U.S. Pat. No. 4,893,637; Barnes et al., U.S. Pat. No. 4,938,238; Shannon et al., U.S. Pat. US Patent No. 5,105,838 to White et al.; US Patent No. 5,119,837 to Banerjee et al.; US Patent No. 5,247,947 to Clearman et al.; US Patent No. 5,303,720 to Banerjee et al.; Casey, III et al., U.S. Patent No. 5,396,911; White, U.S. Patent No. 5,546,965; Meiring et al., U.S. Patent No. 5,727,571; US Patent No. 5,944,025 to Cook et al.; US Patent No. 8,424,538 to Thomas et al.; US Patent No. 8,464,726 to Sebastian et al.; and US Patent No. 8,678,013 to Crooks et al. Have been described.

A longitudinally extending, generally cylindrical aerosol-generating segment 61 is located downstream of the exothermic segment 35 . The aerosol-generating segment 61 includes a substrate element 85 that includes a material that is itself an aerosol-forming agent or substance or otherwise acts as a carrier for an aerosol-forming agent or material (not shown). . For example, the aerosol-generating segment can include processing aids, flavorants, and/or reconstituted tobacco materials that include glycerin. The aforementioned components of the aerosol-generating segment can be placed inside and surrounded by the packaging material 90 . Wrapping material 90 may be configured to facilitate heat transfer from lighting end 14 of smoking article 10 (eg, from heat generating segment 35 ) to components of aerosol-generating segment 61 . That is, the aerosol-generating segment and the heat-generating segment can be configured in a heat exchange relationship with each other, and such heat exchange relationship can be facilitated by the packaging material 90 . The heat exchange relationship is such that sufficient heat from heat source 40 is supplied to aerosol-generating segment 61 to volatilize the aerosol-forming material (i.e., associated with substrate element 85) for aerosol formation and generation. relationship. In some cases, wrapping material 90 may be a separate component relative to outer wrapping material 75 or may engage outer wrapping material 75 in various ways. In other cases, packaging material 90 may include insulating material to insulate base element 85 from outer packaging material 75 . For example, packaging material 90 can include a fiberglass mat having a thickness of between about 50 μm and about 500 μm.

In one aspect of the present disclosure, the heat exchange relationship is achieved by placing the exothermic segment 35 and the aerosol-generating segment 61 in close proximity to one another in series. In some cases, these segments may be arranged in series with each other end-to-end. A heat exchange relationship may also be achieved by extending a thermally conductive material from the vicinity of the heat source 40 to and/or around the area occupied by the aerosol-generating segment 61 . For example, in one aspect, representative packaging material 90 for substrate element 85 includes exothermic segment exothermic segment 61 to effect volatilization of aerosol-forming components contained in aerosol-generating segment 61 (i.e., associated with substrate element 85). 35 to the aerosol-generating segment 61 (and/or keep the heat interacting with the aerosol-generating segment 61 along a length of the aerosol-generating segment 61). can include In other aspects, representative packaging material 90 and/or outer packaging material 75 may be removed from exothermic segment 35 while still effecting volatilization of aerosol-forming components contained in aerosol-generating segment 61 or associated with substrate element 85 . Including heat transfer properties to dissipate heat not directed to the aerosol-generating segment 61 and/or distribute heat evenly or more consistently between the heat generating segment 35 and the aerosol-generating segment 61 be able to. Such a packaging material 90 can be provided by a laminated paper/foil sheet, for example consisting of an outer layer 94 of a sheet of paper-type material and an inner layer 96 of a thermally conductive metal foil sheet. A sheet of metal foil 96 can extend, for example, from a region downstream of heat source 40 along at least a portion of the length of aerosol-generating segment 61 . Flakes of metal foil/inner layer 96 are applied in the form of one or more separate longitudinally extending strips attached to outer layer 94 or cooperating with outer layer 94 to heat generating segment 35 and aerosol generating segment 61 . It can be combined with the outer layer 94 in the form of a continuous sheet surrounding the aforementioned areas of overlap.

In some aspects of the present disclosure that implement packaging material 90, providing thermal conductivity of packaging material 90 may be accomplished in a variety of ways. Generally, wrapping material 90 in the form of laminated paper/foil sheets has a typical length (i.e., aerosol-generating segment 61 along). The laminated paper/foil sheets can be perforated, etched, embossed, or primed, for example, to enhance ease of manufacture. In some cases, the performance of the laminated paper/foil sheet is altered and/or the paper sheet portion of the laminate and/or outer wrapper 75 wrapped around wrapper 90 and/or aerosol-generating segment 61 (i.e., varying the thickness of the foil used in the laminate as needed or desired, for example between about 0.0001 inch and 0.005 inch, to reduce visual charring of the outer layer 94); Alternatively, it can be increased or decreased.

Laminated paper/foil sheets can be formed in a variety of ways. For example, a thermally conductive ink (in some cases, a thermally conductive metallic ink) is used to print onto a piece of paper, and the printed ink is applied to a foil layer (sheet or strip) on the paper piece. (and/or may be at least partially absorbed/integrated into the paper portion). Such thermally conductive inks use, for example, carbon, graphite, graphene, silver, or any other suitable heat transfer or thermally conductive material, or combinations thereof, to conduct heat along the paper portion. heating the substrate element to generate an aerosol from the substrate element. Preferably, such thermally conductive inks can be printed according to a continuous or discontinuous pattern onto foil sheets or conventional cigarette paper, the cigarette paper having a basis weight of about 20 gsm to about 100 gsm. Range.

In other cases, a heat transfer or thermally conductive material such as, for example, a metal foil (i.e., silver), a conductive carbon material (i.e., graphene), or any other suitable thermally conductive material, or combinations thereof, may be used, e.g. Various configurations (i.e., discrete strips, full strips) can be applied to conventional cigarette paper using, for example, "island placement" or selective deposition/engagement techniques to facilitate ease of manufacture and enhance functionality. sheets, complete coatings, etc.) or otherwise attached. In any case, the implementation of the laminated paper/foil sheet as the wrapper 90 may, in some cases, allow the exothermic segments 35 to reduce scorching of the outer wrapper 75 and/or other components of the smoking article. Dissipate or direct the heat generated. Elimination of scorching can thus improve the taste or perception of the generated aerosol to the user. That is, charred substances can impart an undesirable taste or sensation to the aerosol produced, and reduction, minimization, or elimination of such charring can, for example, improve the palatability of the aerosol to the user and Undesirable visual effects caused by such scorching can be eliminated. Accordingly, some aspects of the present disclosure provide a substrate element that contributes to or otherwise affects the heat generated by heat generation segment 35 and directed to aerosol generation segment 61 to the aerosol inhaled and experienced by the user. 85, including structures for guiding and dispensing more completely and efficiently without burning the outer wrapper 90 or other components. Additionally, since the aerosol-generating segment 61 can, in some cases, include glycerin or other leachables, various embodiments of the packaging material 90 disclosed herein may include glycerin or other leachables. Preventing or minimizing the leaching of toxic substances from the aerosol-generating segment 61 into the outer wrapper 75 can also be targeted. That is, some aspects of the present disclosure provide packaging material 90 configured to prevent or minimize discoloration of outer wrapper 75 that may be caused by glycerin or other leachables leached from aerosol-generating segment 61 . can include

In some embodiments, the wrapper 90 can include cigarette paper/foil/tobacco paper in the form of a three-layer sheet, such a three-layer sheet configuration being useful, for example, for burning certain components of smoking articles. Alternatively, reducing, minimizing, or eliminating charring and directing more heat to the aerosol-generating segment 61 may further facilitate improving the taste or perception of the generated aerosol experienced by the user. The tobacco paper/sheet composition may vary, including, for example, consisting of and including various proportions of burley tobacco, pipe-cured tobacco, oriental tobacco, or any other suitable type of tobacco, or combinations thereof. be able to. The tobacco content in the tobacco paper/sheet can be up to about 85% tobacco, and the tobacco paper/sheet can have a basis weight ranging from about 20 gsm to about 100 gsm. In some cases, the three-ply form of wrapping paper 90 may consist of tobacco paper/foil/tobacco paper, as needed or desired. In other cases, two layers of tobacco paper/foil can be achieved, where the tobacco sheet is coated with aluminum or other thermally conductive foil having a thickness ranging from about 0.0005 inch to about 0.002 inch. It can be laminated and such a two-ply sheet can exhibit a basis weight of between about 60 gsm and about 100 gsm.

According to still further embodiments, the wrapping paper 90 comprises a paper-foil sheet laminate, a paper-foil-paper sheet laminate, a paper-foil-tobacco sheet laminate, a nonwoven graphite sheet, a nonwoven graphite and graphene composite sheet, graphene sheet, graphene-foil sheet laminate, graphene-foil-paper sheet laminate, paper-graphene sheet laminate, graphene ink imprinted on paper sheet, graphene ink imprinted on foil sheet, paper sheet or foil It can be configured as either carbon nanotubes associated with sheets, fullerenes associated with paper or foil sheets, and graphene associated with paper or foil sheets. In such cases, it may be desirable for the graphene layer of the laminate to provide the initial layer of the laminate closest to the substrate element 85, for example, where the graphene comprises one of the outer layers of the laminate. . In another example, for example, in the case of a graphene-foil sheet laminate, the foil sheet layer of the laminate provides the initial layer of the laminate closest to the substrate element 85, while the graphene layer is adjacent to the substrate element 85. Serving as a heat shield between the outer packaging material 75, or in reverse order, the graphene layer of the laminated strip is the initial layer of the laminated strip closest to the substrate element 85, and the foil sheet layer is the substrate element 85. and the outer wrapping material 75. If the wrapper 90 includes a thermally conductive layer and a paper or foil sheet, an insulating or thermal layer may be placed therebetween.

For example, in embodiments that practice imprinting of graphene inks, the inks can be applied to various thicknesses, patterns, surface coverages, and compositional gradients by, for example, gravure, flexography, offset, screen, and inkjet printing. , or other suitable printing methods.

In other embodiments, graphene foil or graphene conductive sheets are placed between cigarette paper (i.e., outer wrapping material 75) and aluminum foil (i.e., foil sheet layers incorporated into wrapping paper 90) to provide outer wrapping. A paper/graphene/foil laminate structure can be produced that includes material 75 and wrapping paper 90 . In such cases, the graphene portion can be completely encapsulated (i.e., between the inner and outer layers) to prevent or minimize migration or movement of material during manufacture and use of the product, which can also prevent or minimize leaching of glycerin from the base element 85 into the outer wrapping material 75 . However, a packaging material 90 configured to achieve the objectives herein can be structured or configured in a number of different ways in addition to the various configurations disclosed herein. In this regard, those skilled in the art will appreciate that the exemplary configurations disclosed herein are not intended to be limiting.

An outer wrapper 75 is generally disposed about the exothermic segment 35 and extends longitudinally (downstream) and is configured to wrap around the aerosol-generating segment 61 along at least a portion of the length of the aerosol-generating segment 61 . be. When so engaged around the aforementioned components of the smoking article, the outer wrapper 75 also extends over the interface between the exothermic segment 35 and the aerosol-generating segment 61, thus eliminating the tendency to burn or burn. (as well as tending to prevent leaching) can also be desirable. Accordingly, in some aspects of the present disclosure, the outer wrapper 75 is at least made of calcium carbonate (CaCO ₃ ), aluminum hydroxide, hydroxide, etc. as fillers in the paper matrix of the outer wrapper 75 as an anti-scorch agent. It can be treated with, interacted with, or otherwise exposed to magnesium, and/or combinations thereof.

When the wrapper 90 and/or outer wrapping material 75 is wrapped around the appropriate component of the smoking article, the ends (i.e., the seams extending longitudinally along the smoking article) are sealed together, e.g., by an adhesive material. It will also be understood by those skilled in the art that the edges may overlap in an angular direction forming a . Accordingly, in some aspects of the present disclosure, the adhesive material is applied along the longitudinally extending seams of the outer wrapping material 75 wrapped around the components of the smoking article and/or scorching of the outer wrapping material 75 . Alternatively, fillers such as calcium carbonate (CaCO ₃ ), aluminum hydroxide, magnesium hydroxide, and/or combinations thereof can also be included to prevent, minimize, or eliminate charring.

A substrate element 85 forming part of the aerosol-generating segment 61 may comprise tobacco. More specifically, if tobacco is included, the base element 85 can be composed of flavored tobacco and flavored tobacco blends, for example in the form of cut fillers. Those tobaccos can then be treated with an aerosol-forming material and/or at least one flavoring agent. The substrate element 85 can also be composed of processed tobacco in the form of cut filler (eg, reconstituted tobacco produced using cast sheet or papermaking type processes). Particular cast sheet constructions can contain from about 270 mg to about 300 mg of tobacco per 10 mm linear length of cast sheet. In other cases, the base element 85 can be composed of a mixture of formed tobacco pellets. Next, in certain aspects of the present disclosure, a substrate element 85 configured in the form of tobacco is coated with an aerosol-forming material and/or at least one flavoring agent, as well as a flame retardant (eg, diammonium phosphate, etc.). type salts, and/or other suitable flame retardant materials) or can be processed to contain these. The inclusion of a flame retardant material in the substrate element can be configured to prevent ignition of the material forming the substrate and/or to prevent scorching of the substrate element by the exothermic segments. Additionally, the metallic inner layer or surface 96 of the packaging material/outer layer 94 of the aerosol-generating segment 61 can serve as a carrier for the aerosol-forming material, tobacco ingredients, and/or at least one flavoring agent.

As used herein, the term "tobacco pellets" means tobacco beads, pellets, or other pellets that have been formed, molded, compressed, extruded, or otherwise worked into a desired shape. Intended to include separate subunits. For example, tobacco pellets can be formed using a so-called marumarizing process. Tobacco pellets can have smooth, regular geometries (eg, spheres, cylinders, ovals, etc.) and/or can have irregular geometries. In one example, the diameter of each tobacco pellet can range from less than about 1 mm to about 2 mm. Tobacco pellets can at least partially fill the substrate cavity of the smoking article as described herein. That is, the substrate elements 85 may take the form of pellets or other loose objects that occupy the space within the aerosol-generating segment 61 downstream of the heat generating segment 35 adjacent to the heat generating segment 35 . In one example, the volume of the substrate cavity can range from about 500 mm ³ to about 700 mm ³ (eg, with a cavity diameter of about 7.5 to about 7.8 mm and a cavity length of about 11 to about 15 mm). A smoking article substrate cavity) having a generally cylindrical shape. In one example, the mass of tobacco pellets within the substrate cavity can range from about 200 mg to about 500 mg. For example, tobacco pellets may be placed in a suitable portion of aerosol-generating segment 61 (eg, a cylindrical region inside the packaging material of aerosol-generating segment 61 and bounded by the ends of heat-generating segment 35 and filter segment 55) for about 100 to It can be used to fill with a packing density of about 400 mg/cm ³ .

The configuration and placement of base element 85 may vary according to various aspects of the present disclosure. In one aspect, base element 85 can be formed as a monolithic or integrated structure, for example, by an extrusion, molding, or casting process. In some preferred embodiments, monolithic substrate element 85 can comprise tobacco or tobacco products. For example, in one aspect, a monolithic substrate element 85 formed in an extrusion process can include glycerin, ground tobacco, calcium carbonate, binders, flavors, and water. More specifically, on a dry weight basis, the extruded material contains about 37.86% ground tobacco, about 39.82% calcium carbonate, and about 1.00% binder such as carboxymethylcellulose (CMC) or cellulose gum. , and about 21.32% glycerin and flavor (~20% glycerin).

A monolithic substrate element 85 formed by an extrusion, molding, or casting process can have a variety of final forms and shapes that facilitate improved heat transfer from the heat generating segments 35, and and/or promotes a more efficient and effective distribution of heat to the base element 85 instead of other proximal components of the smoking article, thereby charring or charring the proximal components of the smoking article. can facilitate the reduction, minimization, or elimination of For example, extruded base element 85 can have the form and configuration of a monolithic slotted rod member 300 (see, eg, FIG. 4). That is, the rod member can include a plurality of lobes 310 angularly spaced around the circumference of the rod member, with adjacent lobes defining a longitudinally extending open channel 320 therebetween. In some examples, the slotted rod member can further define one or more conduits 330 that extend longitudinally through the central portion of the cross-section or through one or more lobes. The location, size and/or configuration of the open channels and/or conduits may be varied to obtain particular performance characteristics as needed or desired. For example, one effect of open channels is an increase in exposed surface area when compared to a solid cylindrical rod member, which translates into increased yield of cigarettes (i.e., increased useful life) and increased durability along the smoking article. It has effects such as reduced pressure drop (ie reduced resistance to suction).

The effective diameter (ie, maximum outer diameter) of the grooved rod member can vary, for example, from about 5.8 mm to about 7.3 mm. In order to incorporate the grooved rod member into the aerosol-generating segment 61, the aerosol-generating segment is wrapped with the outer wrapping material 75 (although any of the wrapping material 90 configurations disclosed herein can be implemented as needed or desired). Prior to wrapping, the larger diameter extrudates can be wrapped, for example, with a paper/foil laminate or a paper/foil/paper laminate, while the smaller diameter extrudates can be wrapped, for example, with a single layer of glass fiber mat. Wrapping can then be further wrapped with either a paper/foil laminate or a paper/foil/paper laminate. The increased surface area provided by the grooved rod member results in less surface area of the rod member in contact with wrapping disposed between the rod member and the outer wrapping material 75, thus reducing the surface area of the rod member in contact with the outer wrapping material 75 during use of the smoking article. It will reduce heat transfer. An internal conduit can further provide additional surface area of the rod member to be heated by the exothermic segment and help draw some of the heat from the outermost surface of the grooved rod member (i.e., the outermost portion of the lobe). be able to. In this way, visual charring of the outer wrapping material 75 can be reduced. Additionally, the increased surface area of the grooved rod member compared to the solid cylindrical rod member, which could be further increased by additional conduits, is incorporated into the base element 85 and exposed to heat from the heat generating segments 35. An additional volume of aerosol-forming material (ie, proportional to the surface area of the substrate element 85) can be provided while reducing the draw required by the user to apply to the smoking article. Accordingly, such smoking articles may exhibit improved longevity compared to smoking articles incorporating a solid cylindrical base element 85 .

A paper/foil laminate or paper/foil/paper laminate directly forming the wrap of the substrate element 85, or a paper/foil laminate or paper/foil/paper laminate forming with a single layer of glass fiber mat disposed therebetween. Instead of either paper laminate, a two-ply or three-ply laminate of tobacco paper can be used as the wrapper. In such cases, the initial layer of the wrapper laminate may preferably comprise tobacco paper, provided that the wrapper receives sufficient heat from the exothermic segment to char or scorch the wrapper. In this way, the charring or charring of the tobacco paper layer can impart tobacco flavor to the aerosol formed and thus have little or no adverse effect on the taste or perception of the aerosol formed. More specifically, tobacco paper, such as cast sheet or extruded tobacco paper, can be laminated to a paper/foil bilayer laminate to form a paper/foil/tobacco paper three-layer laminate. , tobacco paper provides the initial layer of the laminate closest to the substrate element 85 . Such a three-layer laminate configuration can be applied, for example, to both tobacco-containing and non-tobacco substrate elements, with seams formed, for example, by wrapping the three-layer laminate around the substrate element (i.e., tobacco It is believed that a seam is formed between the paper and the cigarette paper forming the outer layers of the three-ply laminate) to promote improved adhesion along the aerosol taste experienced by the user and/or It can add a positive aspect to perceptual properties. Those skilled in the art, in understanding the inventive aspects of the present disclosure, will be able to combine the paper/foil/tobacco paper tri-ply laminates of the type disclosed herein with the various tobacco-containing or non-tobacco-containing materials described in this disclosure. It will be further appreciated that it is applicable to both the substrate element and the aerosol-generating segment.

In another aspect of the present disclosure, substrate element 85 takes the form of a plurality of solid cylindrical rod members 400 (see, eg, FIG. 5) extending parallel to each other from the interface of heat generating segment 35 and aerosol-generating segment 61 . can be done. Such solid cylindrical rod members can be formed using extrusion methods or by molding or casting, as desired, for example, with glycerin, ground tobacco, calcium carbonate, binders, flavors, and water. Can be configured. In some examples, a solid cylindrical rod member can have a diameter of about 2.9 mm, and a plurality of such rods are bundled or stacked for insertion into aerosol-generating segment 61 as base element 85. be able to. The solid cylindrical rod members as a group can then be wrapped in a similar manner and under similar conditions as the grooved rod member construction disclosed herein.

In still other embodiments, the material composition used for extruded rods, ie, for example, glycerin, ground tobacco, calcium carbonate, binders, flavoring agents, and water, is substituted to achieve a thickness of about 0.3 mm to about 1 mm. A flat sheet can be formed having a thickness of between 0.7 mm. In some examples, the sheet can also be formed (or molded or cast as desired) by an extrusion process, after which the sheet is dried to form the substrate material. The dried sheet can then be disassembled, for example by cutting the sheet into strips or shredding the sheet. The cut/chopped portions of the formed sheet are then stacked or collected and deposited as substrate elements 85 on the aerosol-generating segments 61 in a manner similar to cut filler tobacco (i.e., cut filler tobacco instead of cut filler tobacco). (deposited in a manner similar to filler tobacco).

In some embodiments, base element 85 can be constructed of a cast sheet comprising tobacco material, for example. Such cast sheets may be formed by a process of casting a selected tobacco-containing mixture, drying, and cutting or shredding into strips. In some instances, cut strips or shreds of cast sheet are mixed with other cut fillers (i.e., with or without additional aerosol forming agents, but traditional (cut filler tobacco) to provide the user's desired taste and perception as well as facilitate the manufacturing process. In one example, the tobacco-containing mixture selected is, for example, about 66.60% ground tobacco (on a dry weight basis), about 3.75% diammonium phosphate, about 4.65% ammonium hydroxide, and about It can be characterized as a pectin-free mixture containing 25% glycerin and flavoring. To treat the pectin-free mixture, grind tobacco, diammonium phosphate, ammonium hydroxide, and water, for example, at about 160° for about 1.5 hours to improve or enhance the organoleptic qualities of the resulting mixture. F. can be heated. Glycerin and flavors can then be added to the remaining mixture upon cooling after the heating step. The resulting mixture can then be used to form cast sheets.

In another example, the selected tobacco-containing mixture comprises, for example (on a dry weight basis) about 65.62% ground tobacco, about 4.50% sodium alginate, about 1.13% sodium hydroxide or pH modifier, about 25% glycerin, and about 3.75% wood pulp. To treat this non-ammoniated mixture, the ground tobacco, sodium alginate, and water are heated to about 160° F. for about 1.5 hours, e.g., to improve or enhance the organoleptic qualities of the resulting mixture. be able to. The hydrated wood pulp, binder, glycerin, and flavorings can then be added to the remaining mixture upon cooling after the heating step. The resulting mixture can then be used to form cast sheets.

In another example, the selected tobacco-containing mixture comprises, for example, (on a dry weight basis) about 51.8% tobacco pulp, about 4.2% wood pulp, about 22.0% concentrated tobacco extract, and a tobacco-containing reconstituted material containing about 22.0% glycerin and flavoring agents. Sheets can be formed from tobacco-containing reconstituted material in a manner similar to conventional reconstituted sheets. For example, the water soluble components are first removed from the tobacco pulp flakes and the remaining tobacco pulp is concentrated to a solids content of about 25%. Wood pulp can then be added to the tobacco pulp to form a basesheet that can vary in basis weight between about 120 grams per square meter (gsm) and about 240 gsm. Glycerin is then mixed with the concentrated tobacco-derived nicotine (TDN) extract (ie, in a 1:1 ratio) and added to the basesheet. The formed basesheet can then be dried and cut into strips or shredded. As with cast sheets, cut strips or chopped reconstituted sheets may be mixed with other cut fillers (i.e., with or without additional aerosol forming agents, but traditional cut filler tobacco) (ie, traditional cut filler tobacco, with or without additional aerosol forming agents).

In another example, the selected tobacco-containing mixture can be characterized as a traditional cut filler tobacco material with increased glycerin content. In such cases, the cut filler tobacco may contain or interact with between about 5% and about 30% glycerin. A cut filler tobacco material having a high glycerin content can then be used as the primary substrate (i.e., the substrate material forming the substrate element) or can be mixed with the cast sheet material and the resulting mixture used to form the substrate element. of substrate material can be formed. Glycerin is applied to the cut filler tobacco, for example, as a casing for cutting (i.e., applied to individual pieces of tobacco), as a top dressing, or both, based on the amount of glycerin needed or desired. be able to. Such cut filler tobacco having a high glycerin content, for example, is mixed with various cast sheets, reconstituted sheets, and/or tobacco beads as needed or desired to form a base material for base element 85. can be formed. In such instances of base element 85 having high glycerin levels, it may be desirable to include an encapsulation of base element 85 that minimizes or eliminates leaching of incorporated glycerin into outer wrapping material 75 .

In yet another example, selected tobacco-containing mixtures can be characterized as non-tobacco materials. For example, a cast sheet, an extruded substrate element, or a beaded (marmerized) form of substrate element used to form the substrate element may contain calcium carbonate, rice flour, binder, diammonium phosphate, glycerin, flavoring agent, Tobacco-derived nicotine (TDN), and water may be included. More specifically, such non-tobacco cast sheets are, for example, about 41.25% calcium carbonate, about 13.75% rice flour, about 6% ammonium alginate, about 5.5% wood pulp, It may consist of about 3.5% diammonium phosphate and about 30% glycerine. Additionally, tobacco-derived nicotine (TDN), certain acids (ie, levulinic acid and/or citric acid), and flavoring agents can be incorporated into the glycerin. Substrate elements by extrusion or in the form of beads (marmerized), for example, about 51.94% calcium carbonate, about 17.15% rice flour, about 1% TDN, about 1% carboxymethylcellulose (CMC), about 0.66% levulinic acid, about 0.44% lactic acid, about 20% glycerin, and about 9.41% flavor. In some cases, the cast sheet can be processed into cut strips, shredded, or processed into a cut filler form. In other cases, if the base element 85 includes a bead, the bead may be positioned to abut the heat generating segment, be adjacent to the heat generating segment, or be closest to the heat generating segment. In these cases, selected components can be provided on the opposite side of the heating segment from the bead to secure the bead in place. For example, such selected components may include folded paper filter material or other non-tobacco paper plugs.

Another example of a substrate element 85 formed of a non-tobacco material includes tobacco-derived nicotine (TDN), glycerin (i.e., an aerosol forming agent), and flavoring agents combined with a relatively high porosity extruded ceramic substrate (i.e., high porosity). porosity extruded ceramic rod member). In such cases, the ceramic rod member defines one or more longitudinally extending channels (i.e., open channels or slots disposed about the outer surface and/or conduits extending through the central portion of the rod member). can be extruded to In a manner similar to the previously disclosed grooved rod member, the increased surface area provided by the ceramic rod member (i.e., due to the open channels around the surface) can be used with the wrap disposed between the rod member and the outer wrapping material 75. This results in less surface area of the rod members in contact and thus less heat transfer to the outer wrapping material 75 during use of the smoking article. An internal conduit can further provide additional surface area of the rod member to be heated by the heat generation segment, and may be used to draw some of the heat from the outermost surface of the grooved ceramic rod member (i.e., the outermost portion of the lobe). can help. In this way, visual charring of the outer wrapping material 75 can be reduced. Additionally, the increased surface area of the grooved ceramic rod member compared to the solid cylindrical rod member, which could be further increased by additional conduits, is incorporated into the base element 85 and exposed to heat from the heat generating segments 35. It can provide an additional volume of aerosol-forming material (ie, proportional to the surface area of the substrate element 85) to be absorbed, as well as reduce the draw required by the user to apply to the smoking article. Accordingly, such smoking articles may exhibit improved longevity compared to smoking articles incorporating a solid cylindrical base element 85 . In addition, open channels/conduits can provide less resistance to inhalation.

In some aspects of the present disclosure, the base element 85 may be segmented (i.e., the base element 85 may include multiple components arranged in series or multiple components arranged in parallel). can) or include a combination of two or more substrate materials. For example, the substrate element can comprise a combination of cast and/or reconstituted sheets, each shredded or cut into strips and mixed with glycerinized cut filler tobacco. Cut filler tobacco can have varying levels of glycerin ranging, for example, from about 5% to about 25%. In another example, a cast sheet that has been shredded or cut into strips can be mixed with tobacco-containing beads. In addition to an extruded substrate element wrapped with a fiberglass mat, the extruded substrate element 85 may be wrapped with tobacco paper or a laminate comprising tobacco paper layers, where the substrate element 85 is, for example, parallel A bundle of arranged small diameter rod members, or cast, extruded, or recycled sheets processed in a similar manner into cut filler tobacco, or rolled together to form a substantially cylindrical substrate element. The composition may consist of strips of tobacco sheet.

In addition to the components disclosed herein, base element 85 may be constructed with many different combinations of such components. In certain embodiments, such components include, for example, glass fiber mats coated with a TDN/glycerin (B3) solution, porous ceramic elements coated with an aerosol forming agent such as glycerin, pectin releasing materials. Non-tobacco such as cast sheet, non-ammoniated cast sheet, non-tobacco cast sheet, aerosol forming agent coated gathered or shredded foil sheets or strips formed therefrom, gathered paper treated with an extract such as TDN. A further selection may be made from the group consisting of products, beads, or gathered carbon or non-carbon paper.

The components of the aerosol-generating segment can vary. The aerosol-generating segment incorporates components that can evaporate, aerosolize, or be entrained in the air inhaled through the smoking article during use. Most preferably, these components, individually or in combination, provide sensory and organoleptic effects such as aroma, flavor, mouthfeel, visible aerosol sensation, and the like. Examples of aerosol-generating segment components that are drawn into the smoker's mouth upon inhalation include water (e.g., as water vapor), visible aerosol-forming materials (e.g., glycerin), various volatile flavorants (e.g., vanillin or menthol). ), volatile components of tobacco (eg, nicotine), and the like.

Preferred aerosol-forming materials produce a visible aerosol when sufficient heat is applied or otherwise by the action of aerosol-forming conditions provided by the smoking article components. Highly preferred aerosol-forming materials produce a visible aerosol that can be considered "smoke-like." Preferred aerosol-forming materials are chemically simple compared to the chemistry of smoke produced by burning tobacco. Preferred visible aerosol-forming materials are polyols, and exemplary preferred aerosol-forming materials include glycerin, propylene glycol, and mixtures thereof. If desired, the aerosol-forming material can be combined with other liquid materials such as water. For example, an aerosol-forming material formulation can include a mixture of glycerin and water, or a mixture of propylene glycol and water. For example, Sensabaugh, Jr. U.S. Pat. No. 4,793,365 to Jakob et al.; U.S. Pat. No. 5,101,839 to Jakob et al.; and U.S. Pat. No. 8,678,013 to Crooks et al.; See aerosol-forming materials.

The materials that can be used to provide a substrate for the aerosol-forming material within the aerosol-generating region can vary. Suitable substrate elements and associated aerosol-forming materials are incorporated in types of cigarettes marketed under the brands "Premier," "Eclipse," and "Steam Hot One." The substrate element can comprise some form of tobacco, usually consists primarily of tobacco, and can be provided by virtually any tobacco material. For example, in some embodiments, at least a portion of the total substrate material is used essentially in the form of traditional fillers (eg, cut fillers). Suitable substrate materials and substrate formulations, including aerosol-forming materials (including cast sheets and paper-type reconstituted tobacco materials), are described in Sensabaugh et al., US Pat. No. 4,793,365; White, US Pat. No. 4,893,639. US Patent No. 5,099,861 to Clearman et al.; US Patent No. 5,101,839 to Jakob et al.; US Patent No. 5,105,836 to Gentry et al.; US Patent No. 5,109,122 to Clearman et al.; US Patent No. 5,203,355 to Clearman et al.; US Patent No. 5,271,419 to Arzonico et al.; US Patent No. 5,327,917 to Lekwauwa et al.; US Patent No. 5,396,911 to Casey, III et al. U.S. Pat. No. 5,533,530 to Young et al.; U.S. Pat. No. 5,588,446 to Clearman; U.S. Pat. No. 5,598,868 to Jakob et al.; U.S. Pat. No. 6,378,528, and U.S. Patent No. 8,678,013 to Crooks et al.; and U.S. Patent Application Publication No. 2005/0066986 to Nestor et al.; U.S. Patent Application Publication No. 2012/0067360 to Conner et al.; Also described in US Patent Application Publication No. 2015/0157052 to Ademe et al. Further, the substrate material employs the type of morphology or configuration described in Conner et al. U.S. Pat. No. 8,839,799 and the type of technology generally described in Pryor et al. as a gathered web or sheet, or in the form of a web or sheet that is chopped into multiple longitudinal strips using techniques of the type generally described in Raker U.S. Pat. No. 5,025,814; can have

The method of contacting the aerosol-forming material with the substrate material (eg, tobacco material) can vary. Aerosol-forming materials can be applied to formed tobacco materials or can be incorporated into processed tobacco materials during the manufacture of those materials. Aerosol-forming materials can be dissolved or dispersed in an aqueous liquid or other suitable solvent or liquid carrier and sprayed onto the substrate. See, for example, US Patent Application 2005/0066986 to Nestor et al. The amount of aerosol-forming material used relative to the dry weight of substrate material may vary. Materials containing very high levels of aerosol-forming material can be difficult to process into cigarette rods using conventional types of automated cigarette making equipment.

Cast sheet type materials can contain a relatively high level of aerosol forming material. Reconstituted tobacco manufactured using a papermaking type process can contain moderate levels of aerosol-forming materials. Tobacco shreds and cut filler tobacco may contain less aerosol-forming material. A variety of paper and non-paper materials, including gathered, laminated, laminated metallic/metallic, strips, beads such as alumina beads, open cell foams, expanded monoliths, air permeable matrices, and other materials, are within the scope of this disclosure. A paper substrate can be used. See, for example, US Pat. No. 5,183,062; US Pat. No. 5,203,355; and US Pat. No. 5,588,446, all to Clearman.

The laminated paper or other packaging material can be made according to the disclosure of Marton US Pat. No. 6,849,085 or by other suitable methods and/or materials.

In some preferred smoking articles, both ends of aerosol-generating segment 61 are open to expose base element 85 thereof. Heat generating segment 35 and aerosol generating segment 61 cooperate to form aerosol generating system 99 . The aerosol-generating segment is positioned adjacent the downstream end of the heat generating segment, and the segments are axially aligned in end-to-end relationship. These segments can abut each other or be placed in a slightly spaced apart relationship that can include an optional buffer region 110 (which in some cases can include a thermally conductive multi-porous spacer element). you can The outer cross-sectional shapes and dimensions of these segments may be essentially identical to each other when viewed transversely to the longitudinal axis of the smoking article 10 . The physical arrangement of these components preferably ensures that (e.g., conductive and convective) flow from the heat source 40 to the adjacent substrate element 85 throughout the operating (e.g., burning) time of the heat source during use of the smoking article 10. The arrangement is such that heat is transferred (by a mechanism involving heat transfer).

Buffer region 110 may reduce possible scorching or other thermal degradation of portions of aerosol-generating segment 61 . The buffer region can comprise primarily empty air spaces, or can be partially or substantially completely of non-combustible material such as, for example, metallic, organic, inorganic, ceramic, or polymeric materials, or any combination thereof. may be filled. The cushioning region may be from about 1 mm to about 10 mm thick (length) or more, but is often from about 2 mm to about 5 mm thick (length). If desired, buffer regions or spacer segments 110 can include catalytic materials such as materials containing cerium or copper ions or oxides and/or salts of cerium and copper ions. See, for example, Banerjee et al. US Pat. No. 8,469,035 and Banerjee et al. US Pat. No. 8,617,263 and Banerjee et al.

The components of the aerosol generation system 99 are preferably attached to each other and secured in place using an overwrap material 118 . For example, the overwrap material may comprise a paper wrapping material or laminated paper type material surrounding the downstream portion of the exothermic segment 35 and at least a portion of the longitudinally extending outer surface of the aerosol-generating segment 61 . The inner surface of the overwrap material 118 can be secured to the outer surface of the component enclosed by the overwrap material 118 by a suitable adhesive. In this manner, aspects disclosed herein directed to reducing, minimizing, or eliminating scorching or charring of the outer wrapping material 75 or wrapping paper 90 ensure that the overlap material 118 overlaps the outer wrapping material 75, Those skilled in the art will appreciate that it can alternatively apply to the overwrap material 118 as long as it extends over the interface between the heat generating segment 35 and the aerosol generating segment 61 .

The smoking article 10 preferably includes a suitable mouthpiece such as, for example, a filter element 135 located at the mouth end 18 of the smoking article 10 . The filter element 135 is preferably positioned at one end of the aerosol generation system 99 with the filter element 135 and the aerosol generation segment 99 axially aligned in end-to-end relationship and abutting each other with no barriers in between. placed. Preferably, the overall cross-sectional shapes and dimensions of these segments 99, 135 are essentially identical to each other when viewed transversely to the longitudinal axis of the smoking article. The filter element 135 may include a filter material 140 wrapped along its longitudinally extending surface by a surrounding plugwrap material 142 . In one example, filter material 140 comprises plasticized cellulose acetate tow, or other suitable cigarette-type filter material. Both ends of filter element 135 are preferably open to allow passage of aerosols. In some cases, filter element 135 can be configured to include any combination of paper plugs, voids, and conventional cigarette filter materials (i.e., cellulose acetate tow) as needed or desired. can.

In addition, the filter element contains crushable flavor capsules of the type described in Thomas et al., U.S. Pat. No. 7,479,098, Dube et al., U.S. Pat. No. 7,793,665, and Ademe et al., U.S. Pat. may contain.

Aerosol generation system 99 is preferably attached to filter element 135 using tipping material 150 . Examples of tipping materials are, for example, US Pat. No. 7,789,089 to Dube et al.; US Patent Application Publication No. 2010/0108084 to Ademe et al., and US Patent Application Publication No. 2013/0167849 to Ademe et al.

The smoking article 10 may include air dilution provisions such as a series of perforations 160 that may each extend through the filter element tipping material 150 and plug wrap material 142 . Alternatively, the various perforations may extend around the smoking article as rings in a region upstream from that shown.

A typical smoking article 10 has a length between about 80 mm and about 100 mm. For example, for a smoking article 10 having a length of approximately 85 mm, a representative heat generating segment 35 can have a length of between approximately 10 mm and approximately 15 mm, and a representative aerosol generating segment 61 can have a length of approximately 40 mm. A typical filter element 135 can have a length between about 20 mm and about 30 mm.

The cigarette described with reference to FIG. Cigarettes marketed under the brands "Premier" and "Eclipse" by Reynolds Tobacco Company and Japan Tobacco Inc.; can be used in much the same way as the cigarettes marketed under the brand "Steam Hot One" by the company. That is, the fuel element or heat source is ignited using a match or cigarette lighter. Such ignition causes the combusted fuel element/heat source to generate heat that is transferred to the substrate element within the aerosol-generating region of the cigarette. A substrate element containing an aerosol-forming material and tobacco flavors and ingredients are heated to volatilize and form an aerosol. This aerosol is entrained in the inhaled air and drawn through the filter element into the smoker's mouth.

FIG. 2 illustrates another exemplary smoking article 10 in the form of a cigarette according to another aspect of the disclosure. Preferably, the smoking article 10 has the general size, shape and general appearance of the smoking article described above with reference to Figure 1 and includes those types of components. However, the length of filter segment 135 has been increased and the length of aerosol-generating segment 61 has been decreased compared to the embodiment of FIG. For example, in the illustrated embodiment, the filter element 135 is a two-part segment comprising a terminal mouthpiece segment 182 and a tubular segment 184 positioned between the aerosol-generating segment and the terminal mouthpiece segment. have. Thus, the exemplary smoking article of FIG. 2 is a four-segment smoking article, while the exemplary smoking article of FIG. 1 is a three-segment smoking article.

Typically, tubular segment 184 is constructed of a vapor-bonded plasticized cellulose acetate tube that provides resilience, structure and length to the smoking article while allowing the passage of inhaled air. Alternatively, the tubular segment is composed of a heat resistant plastic material (eg a tube made of polycarbonate) or a ceramic material.

A representative smoking article 10 of the type shown in FIG. 2 has a length between about 80 mm and about 100 mm. For example, for a smoking article 10 having a length of approximately 85 mm, a representative heat generating segment 35 can have a length of between approximately 10 mm and approximately 15 mm, and a representative aerosol generating segment 61 can have a length of approximately 10 mm. to about 25 mm, a representative tubular segment 184 can have a length of between about 30 mm to about 50 mm, and a representative filter element 135 can have a length of between about 20 mm to about It can have a length of between 30mm.

Figure 3 shows another representative smoking article 10 in the form of a cigarette. Preferably, the smoking article 10 has the general size, shape and general appearance of the smoking article described above with reference to Figure 2 and includes those types of components. However, a tobacco segment 198 of cut filler tobacco 200 wrapped in wrapper 205 is positioned between aerosol generating system 99 and filter element 135 . Compared to the embodiment of FIG. 2, the overall length of the two-part filter segment is reduced to accommodate the segment composed of cut filler tobacco. Thus, the exemplary smoking article of FIG. 3 is a 5-segment smoking article, while the exemplary smoking article of FIG. 2 is a 4-segment smoking article.

The upstream segment of the two-part filter segment 135 comprises a curing tube composed of cellulose acetate tow, a segment of cellulose acetate tow having discrete particles of activated carbon particles dispersed throughout, and a breakable flavorant-containing capsule. It can consist of arranged segments of cellulose acetate, and the like. Typically, the downstream segment of the two-part filter segment 135 is a segment constructed of plasticized cellulose acetate tow or gathered polypropylene web. If desired, the two-part filter segments can be replaced with single-segment filter elements or three-part cavity filters.

A representative smoking article 10 of the type shown in FIG. 3 has a length between about 80 mm and about 100 mm. For example, for a smoking article 10 having a length of approximately 85 mm, a representative heat generating segment 35 may have a length of between approximately 10 mm and approximately 15 mm, and a representative aerosol generating segment 61 may have a length of approximately 10 mm. to about 25 mm, a typical tobacco filler segment 198 can have a length of between about 30 mm to about 50 mm, and a typical filter element 135 can have a length of about 20 mm to about 50 mm. It can have an overall length of between about 30mm. For a representative filter element of the illustrated embodiment, upstream filter element segment 220 can have a length between about 5 mm and about 20 mm, and downstream filter element segment 225 can have a length between about 5 mm and about 20 mm. can have a length between For example, a representative smoking article having an overall length of about 83 mm has a heat generating segment 35 having a length of about 12 mm, an aerosol generating segment 61 having a length of about 13 mm, a tobacco filler segment 198 having a length of about 37 mm, It can have a cellulose acetate tubular filter segment 220 with a length of about 7 mm and a low efficiency plasticized cellulose acetate tow segment 225 with a length of about 14 mm.

Typical smoking articles also include various components associated with their construction. For example, these types of components include packaging materials, thermally conductive materials, metal foils and foil laminates, mouth end pieces, filter elements, plug wraps, tipping materials, and adhesives. Additionally, a typical smoking article can include any of a wide variety of tobacco types, tobacco forms, and blends thereof. For example, representative types described and referenced in Fagg et al., US Pat. No. 5,724,997, Crooks et al., US Pat. No. 8,678,013, and Ademe et al., US Pat. See the components of

Various combinations and variations of flavoring agents (including various materials that alter the sensory and/or organoleptic properties or properties of mainstream aerosols of smoking articles) can be incorporated into suitable smoking articles. The substrate material and various tobacco components of the smoking article can be treated with tobacco additives of the type traditionally used in the manufacture of cigarettes, such as casing and/or top dressing components. See, for example, ingredients of the type described in US Pat. No. 8,678,013 to Crooks et al.

Dos and methods for assembling representative types of smoking articles are described in US Patent No. 5,469,871 to Barnes et al. and US Patent No. 8,678,013 to Crooks et al. US Patent Application Publication No. 2012/0067360 to Conner et al., US Patent Application Publication No. 2014/0261470 to Amiss et al., and US Patent Application Publication No. 2015/0157052 to Ademe et al. Have been described.

In light of the possible interrelationships between aspects of this disclosure in providing the benefits and advantages described above associated with aspects of this disclosure, this disclosure specifically expresses embodiments that exhibit various combinations of the disclosed aspects. including, but not limited to, The present disclosure may include any combination of two, three, four or more features or components described in this disclosure in which such features or components are described in specific embodiments herein. including whether or not explicitly combined or otherwise set forth. The present disclosure is intended to be understood as a whole, and thus any separable feature or element of the disclosure may be construed as part of its aspects and implementations, unless otherwise apparent from the context of the disclosure. Any of the forms should be considered as intended, i.e. combinable.

Aerosols produced by cigarettes of the present disclosure are aerosols that include air-containing components such as vapors, gases, airborne particles, and the like. The aerosol component can be derived from combustion of some form of tobacco (and optionally other components that burn to generate heat), heating the tobacco, carbonizing the tobacco (or otherwise smoldering some form of the tobacco). can be produced by the thermal decomposition of tobacco caused by (causing ) as well as evaporation of the aerosol-forming agent. Thus, aerosols can include aerosols described as volatiles, combustion products (eg, carbon dioxide and water), incomplete combustion products, and pyrolysis products, and other smoke.

An aerosol component is a substance that is placed in a heat exchange relationship with the burning tobacco material and other burning components to transfer heat from the combustion of some form of tobacco (and optionally other components that burn to generate heat). can also be generated by acting on Additionally, an aerosol component may be generated by the aerosol generation system as a result of the action of the exothermic segment on the aerosol generation segment. In some embodiments, the components of the aerosol-generating segment are such that these components do not tend to undergo thermal decomposition to any significant degree under normal conditions of use (e.g., as a result of combustion, smoldering, or thermal decomposition). It has the overall composition and placement in the smoking article as it has.

Numerous modifications and other aspects of the disclosure described herein will come to mind to one skilled in the art to which this disclosure pertains, having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. . For example, those of ordinary skill in the art may combine features described for different embodiments herein with each other and/or at present without departing from the scope of the claims presented herein. It will be understood that embodiments not expressly shown herein may be practiced within the scope of the present disclosure, such as may be combined with technology known in the art or technology developed in the future. In some such embodiments, the outer wrapping material is used, for example, using an embossed overwrap material (i.e., consisting of paper) as an additional layer over the outer wrapping material (i.e., cigarette paper). Alternative means for reducing, minimizing, or eliminating scorching, charring, or discoloration can be implemented. In such cases, the embossing provides an increased surface area and/or the embossed overwrap material is positioned at least partially away from the outer wrapping material, thereby allowing the overwrap material to be cooled by ambient air. (ie, cooling fins). In still other examples, various means can be implemented to provide visual cues of overheating or too high a temperature. For example, the embossed overwrap material and/or the outer wrapping material visually appear or change above a temperature threshold or at a certain temperature range, and/or below a temperature threshold or at a certain temperature. Printing can be done with thermochromic inks that fade in range. In this way, it is possible to use a smoking article that is at too high a temperature condition until, for example, the appearance of the indicia provided by the thermochromic ink changes to indicate that the smoking article is at the proper temperature. and such means prevent use at temperatures that are too high, which could lead to scorching or charring of the outer packaging material or other components subjected to the heat generated by the heat generating segments. can do. In yet another example, a non-woven graphite or graphene sheet as a heat conducting element, or a non-woven graphite or graphene sheet that otherwise carries away excess heat from the outer wrapper 75, is used as the outer wrapper 75 or wrapper. /material 90 or may be combined with outer wrapping material 75 or wrapper/material 90 . That is, a nonwoven graphite or graphene sheet can be wrapped around a portion of the heat generating portion and around a portion of the aerosol generating portion inside the outer wrapping material and extend toward the mouthpiece end portion.

Therefore, the present disclosure is not intended to be limited to the particular aspects disclosed, but equivalents, modifications, and other aspects are intended to be included within the scope of the appended claims. should be understood. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation. Aspects of the present disclosure are described more fully herein by a number of examples, which are set forth to illustrate certain aspects of the disclosure and to illustrate techniques of the disclosure. should not be construed as limiting scope. All parts and percentages are by weight unless otherwise specified.

Claims (33)

An elongated smoking article having a lighting end and an opposite mouth end, said smoking article comprising:
a mouthpiece end portion positioned at the mouthpiece end;
a heat generating portion located near the firing end;
an outer wrapping material wrapped around at least the heat generating portion to define a cylindrical rod and extending toward the mouth end portion;
an aerosol-generating portion disposed inside the outer wrapping material and between the heat-generating portion and the mouth end portion and configured to generate an aerosol in response to heat received from the heat-generating portion;
The aerosol-generating portion and the heat-generating portion are further configured to cooperate to distribute heat received by the aerosol-generating portion from the heat-generating portion to prevent scorching of the outer wrapping material.
smoking goods. The aerosol-generating portion comprises a rod member having a length and a maximum diameter, the rod member having a length and a maximum diameter equal to the length and maximum diameter of the rod member, respectively. A smoking article according to claim 1, having a large surface area. 2. The smoking article of Claim 1, wherein the aerosol-generating portion comprises a grooved rod member. 4. The smoking article of Claim 3, wherein the grooved rod member defines a channel extending longitudinally therethrough. 4. The smoking article of Claim 3, wherein the grooved rod member is extruded from a mixture comprising ground tobacco, calcium carbonate, binder, glycerin, water and flavoring agent. 2. The smoking article of Claim 1, wherein the aerosol-generating portion comprises an aerosol-generating element surrounded by a wrapping material, the wrapping material located between the aerosol-generating element and the outer wrapping material. The packaging material is a paper-foil sheet laminate, a paper-foil-paper sheet laminate, a paper-foil-tobacco sheet laminate, a non-woven graphite sheet, a graphene sheet, a graphene-foil sheet laminate, a graphene-foil-paper sheet Laminates, paper-graphene sheet laminates, graphene ink imprinted on paper sheets, graphene ink imprinted on foil sheets, carbon nanotubes engaged in paper or foil sheets, on paper or foil sheets 7. The smoking article of Claim 6 selected from the group consisting of engaged fullerenes and graphenes engaged to a paper or foil sheet. 8. The smoking article of Claim 7, wherein the graphene ink is imprinted on the paper or foil sheet according to a continuous or discontinuous pattern. 8. The smoking article of Claim 7, wherein the paper sheet comprises a tobacco wrapper sheet, and wherein the tobacco sheet comprises an extruded tobacco sheet, a cast tobacco sheet, or a reconstituted tobacco sheet. 8. The smoking article of Claim 7, wherein the foil sheet comprises a continuous foil sheet or individual foil strips. 2. The smoking article of claim 1, further comprising a tobacco portion positioned inside the outer wrapping material and between the heat generating portion and the aerosol generating portion. 2. The smoking article of claim 1, further comprising a tobacco portion positioned inside the outer wrapping material and between the aerosol-generating portion and the mouth end portion. further a nonwoven graphite sheet or a nonwoven composite graphite and graphene sheet wrapped inside the outer wrapping material around a portion of the exothermic portion and around a portion of the aerosol-generating portion and extending toward the mouthpiece end portion; 10. The smoking article of claim 1, comprising: 14. The smoking article of Claim 13, wherein the nonwoven graphite sheet is laminated with an outer wrapping material. Further comprising a metal foil sheet laminated to the outer packaging material with an adhesive material therebetween, the adhesive material including a portion of aluminum hydroxide, and the metal foil sheet surrounding the heat generating portion inside the outer packaging material and a portion of the aerosol-generating portion and extending toward the mouth end portion. 2. The smoking article of Claim 1, wherein the outer wrapping material comprises an aluminum hydroxide portion, a magnesium hydroxide portion, or a calcium carbonate portion. 2. The smoking article of claim 1, further comprising a fiberglass sheet wrapped inside the outer wrapping material around the heat generating portion and a portion of the aerosol generating portion and extending toward the mouth end portion. Further comprising a thermally conductive material engaged with the outer wrapping material, the thermally conductive material disposed inside the outer wrapping material and radially wrapping at least partially around the heat generating portion and longitudinally from the heat generating portion. 2. The smoking article of claim 1, extending wraparound to the aerosol-generating portion. The thermally conductive material is a conductive ink imprinted onto the outer packaging material, a metal layer deposited onto selected portions of the outer packaging material, graphene engaged to the outer packaging material, or a selection of the outer packaging material. 19. The smoking article of Claim 18, comprising a carbon material engaged with the pressed portion. The aerosol-generating portion is a cast sheet of tobacco material in the form of cut filler, a sheet of reconstituted tobacco material in the form of cut filler, a cut filler tobacco material treated with glycerin, an aerosol-forming bead, a ceramic material comprising glycerin, a cut filler fiberglass mats containing tobacco-derived nicotinic substances; foil sheets coated with aerosol-forming materials; gathered paper containing tobacco-derived nicotinic substances; non-tobacco materials containing tobacco-derived nicotinic substances; 2. The smoking article of Claim 1, comprising a material selected from the group consisting of these combinations. 21. The smoking article of claim 20, wherein the glycerin-treated cut filler tobacco material comprises between about 5% and about 25% glycerin. 20. Claim 20, wherein the aerosol-generating portion comprises a first portion and a second portion, the first portion and the second portion being disposed continuously between the exothermic portion and the mouth end portion. Smoking articles listed in . 21. The aerosol-generating portion of claim 20, wherein the aerosol-generating portion comprises a first portion and a second portion, the first portion of the aerosol-generating portion being composed of a different material than the second portion of the aerosol-generating portion. smoking goods. 21. Smoking according to claim 20, wherein the aerosol-generating portion comprises a first portion and a second portion, the first and second portions being mixed to form a single aerosol-generating element. product. 2. Smoking according to claim 1, wherein the aerosol-generating portion comprises a porous ceramic rod member defining at least one conduit, the at least one conduit extending longitudinally through the porous ceramic rod member. product. 26. The smoking article of Claim 25, wherein the porous ceramic rod member comprises an aerosol forming agent, flavorant, or tobacco extract engaged to the porous ceramic rod member. 27. The smoking article of Claim 26, wherein the aerosol-forming agent comprises glycerin and tobacco extract, and wherein the tobacco extract comprises tobacco-derived nicotine. 26. The smoking article of claim 25, wherein the porous ceramic rod member defines a plurality of longitudinally extending open channels angularly spaced around the outer surface of the porous ceramic rod member. 2. Smoking according to claim 1, wherein the aerosol-generating portion is composed of aerosol-forming beads arranged continuously relative to the heat-generating portion and includes a non-tobacco plug member positioned between the beads and the mouth end portion. Product. 2. The smoking article of Claim 1, wherein the aerosol-generating portion comprises a plurality of rod members extending parallel to each other, the rod members being constructed of tobacco, non-tobacco, or ceramic materials. 11. The heat generating portion comprises a heating element comprising a carbonized or pyrolyzed material comprising a flammability enhancing material selected from the group consisting of carbon, cotton linters, glass microspheres, catalysts, and combinations thereof. Smoking articles listed in . 4. The claim further comprising an overwrap material wrapped around at least the outer wrapping material wrapped around at least the heat generating portion, the overwrap material being embossed at least partially away from the outer wrapping material. 1. The smoking article according to 1. Further comprising a thermochromic ink material interacting with the outer wrapping material, the thermochromic ink configured to provide a visual indicia in response to the outer wrapping material exceeding a temperature threshold. 2. The smoking article of claim 1, wherein the smoking article is

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