JP2024505989A - Aerosol-generating article comprising a tubular element - Google Patents

Abstract

The aerosol generating article has an upstream end and a downstream end, and the aerosol generating article defines a longitudinal axis between the upstream end and the downstream end. The aerosol-generating article includes an aerosol-forming substrate. The aerosol-generating article includes a tubular element disposed downstream of the aerosol-forming substrate and extending longitudinally, the tubular element including an air inlet. The aerosol generating article includes a flavor substrate disposed downstream of the air inlet, the flavor substrate including a flavor material. [Selection diagram] Figure 1

Description

The present invention relates to an aerosol-generating article that includes an aerosol-forming substrate for generating an inhalable aerosol upon heating.

Aerosol-generating articles in which an aerosol-forming substrate, such as a tobacco-containing substrate, is heated rather than combusted are known in the art. The purpose of such heated aerosol generating articles is to reduce the potentially harmful by-products produced by tobacco combustion and pyrolysis in conventional cigarettes.

In heated aerosol-generating articles, an inhalable aerosol is typically generated by heat transfer from a heater to an aerosol-forming substrate. During heating, volatile compounds are released from the aerosol-forming substrate and entrained into the air. For example, volatile compounds may be entrained in air that is drawn through, around, or otherwise into the vicinity of the aerosol-generating article. As the released volatile compounds cool, they condense to form an aerosol. Aerosols can be inhaled by the user. Aerosols can contain aroma, flavor, nicotine, and other desirable elements.

A heating element may be included in the aerosol generating device. The combination of an aerosol-generating article and an aerosol-generating device can form an aerosol-generating system.

The heated aerosol-generating article may include a flavor substrate in addition to the aerosol-forming substrate. Heat transfer from the heater to the flavor substrate causes volatile compounds to be released from the flavor substrate and entrained into the air. When the released volatile compounds cool, they condense to form an aerosol that may contain aromas, flavors, nicotine, and other desired elements. The aerosol formed from the flavor substrate can be entrained in the aerosol formed from the aerosol-forming substrate. The resulting mixed aerosol can be inhaled by the user.

It is therefore desirable to provide an aerosol-generating article in which a mixed aerosol formed from an aerosol-forming substrate and from a separate flavor substrate is generated in an efficient manner.

1 depicts a longitudinal cross-section of an aerosol-generating article with an air inlet in a tubular element. 2 depicts the aerosol-generating article of FIG. 1 at the moment when the aerosol-forming substrate and flavor substrate are heated to release an aerosol, the flavor substrate being fluid permeable; FIG. 1 shows a longitudinal cross-sectional view of an aerosol-generating article in which the tubular element includes an inner airflow channel and an outer airflow channel. 4 shows the aerosol-generating article of FIG. 3 at the moment when the aerosol-forming substrate and flavor substrate are heated to release an aerosol, and the spanning element, flavor substrate and permeability control element are fluid permeable. 1 depicts a longitudinal cross-sectional view of an aerosol-generating article in which a flavor substrate is disposed within an outer airflow channel of a tubular element. 5 depicts the aerosol-generating article of FIG. 5 at the moment when the aerosol-forming substrate and flavor substrate are heated to release an aerosol, and the spanning element, flavor substrate and permeability control element are fluid permeable. A longitudinal cross-sectional view of the aerosol-generating article is shown, with the flavor substrate being the only permeability control element downstream of the air inlet in the outer airflow channel. 7 depicts the aerosol-generating article of FIG. 6 at the moment when the aerosol-forming substrate and flavor substrate are heated to release an aerosol, and the spanning element and flavor substrate are fluid permeable. FIG. 1 shows a longitudinal cross-sectional view of an aerosol generation system including an aerosol generation article and an aerosol generation device. 10 depicts the housing of the aerosol generating device of FIG. 9 receiving an aerosol generating article; FIG. 11 shows a perspective view of the aerosol generator of FIGS. 9 and 10. FIG. A perspective view of the downstream induction heating device is shown. FIG. 13 is an exploded view of the downstream induction heating device of FIG. 12;

An aerosol generating article may be provided. The aerosol generating article has an upstream end and a downstream end, and the aerosol generating article defines a longitudinal axis between the upstream end and the downstream end. The aerosol-generating article may include an aerosol-forming substrate. The aerosol-generating article may include a tubular element disposed downstream of the aerosol-forming substrate and extending longitudinally. The tubular element may be provided with an air inlet. The aerosol generating article may include a flavor substrate disposed downstream of the air inlet. The flavor substrate may include a flavor material configured to be fluid permeable when the temperature of the flavor material is equal to or greater than the permeability transition temperature of the flavor material. The flavoring material may be configured to be substantially fluid-impermeable when the temperature of the flavoring material is below the permeability transition temperature of the flavoring material. The flavoring material can be a gel composition.

An aerosol-generating article may be provided, the aerosol-generating article having an upstream end and a downstream end, the aerosol-generating article defining a longitudinal axis between the upstream end and the downstream end, the aerosol-generating article comprising:
an aerosol-forming substrate;
a tubular element disposed downstream of the aerosol-forming substrate and extending along the longitudinal axis, the tubular element comprising an air inlet;
a flavor substrate disposed downstream of the air inlet, the flavor substrate comprising a flavor material, the flavor material having a temperature equal to or greater than a permeability transition temperature of the flavor material; a flavor substrate configured to be fluid permeable and configured to be substantially fluid impermeable when the temperature of the flavor material is below the permeability transition temperature of the flavor material; Be prepared.

As used herein, the term "tubular element" is used to mean a generally elongate element that defines a lumen or airflow channel along its longitudinal axis. In particular, the term "tubular" hereinafter refers to at least one member having a substantially cylindrical cross-section and establishing uninterrupted fluid communication between the upstream end of the tubular element and the downstream end of the tubular element. Used in connection with tubular elements that define airflow channels. However, it will be appreciated that alternative shapes of the tubular element (eg, alternative cross-sectional shapes) may be possible.

As used herein, the term "elongated" means that an element has a length dimension that is greater than its width dimension or its diameter dimension, such as, for example, more than twice its width dimension or its diameter dimension. means.

The term "aerosol-generating article" is used herein to mean an article in which an aerosol-forming substrate is heated to produce an inhalable aerosol for delivery to a consumer. As used herein, the term "aerosol-forming substrate" refers to a substrate that has the ability to emit volatile compounds that can form an aerosol. These volatile compounds may be released by heating the aerosol-forming substrate. The aerosol-forming substrate is typically part of an aerosol-generating article.

The aerosol-forming substrate may include nicotine. The nicotine-containing aerosol-forming substrate may be a nicotine salt matrix.

The aerosol-forming substrate may be a liquid. The aerosol-forming substrate may include a solid component and a liquid component. Preferably, the aerosol-forming substrate is solid.

The aerosol-forming substrate may include plant-derived materials. The aerosol-forming substrate may include tobacco. The aerosol-forming substrate may include a tobacco-containing material that includes volatile tobacco flavor compounds that are released from the aerosol-forming substrate upon heating. The aerosol-forming substrate may include non-tobacco materials. The aerosol-forming substrate may include homogenized plant-derived material.

As used herein, the term "aerosol generating device" refers to a device that includes a heater that interacts with an aerosol-forming substrate or flavor substrate of an aerosol-generating article to generate an aerosol.

The term "rod" as used herein in connection with the present invention is used to denote a generally cylindrical element of substantially circular, oval or elliptical cross section.

As used herein, the term "longitudinal" refers to a direction that corresponds to the main longitudinal axis of an aerosol-generating article, extending between the upstream and downstream ends of the aerosol-generating article. The terms "upstream" and "downstream" as used herein describe the relative position of an element (or portion of an element) of an aerosol-generating article with respect to the direction in which aerosol is conveyed through the aerosol-generating article during use. do.

During use, air is drawn longitudinally through the aerosol generating article. The term "transverse" refers to a direction perpendicular to the longitudinal axis. Any reference to a "cross-section" of an aerosol-generating article or a component of an aerosol-generating article refers to a cross-section, unless otherwise specified.

The term "length" refers to the dimension of a component of an aerosol generating article in the longitudinal direction. For example, it may be used to mean the dimension of a rod or elongated tubular element in the longitudinal direction.

The term "flavor substrate" as used herein relates to a substrate separate from an aerosol-forming substrate that is capable of emitting volatile compounds capable of forming an aerosol. These volatile compounds may be released by heating the flavor substrate.

An aerosol-generating article according to the invention as defined above comprises a combination of a tubular element arranged downstream of an aerosol-forming substrate and comprising an air inlet, and a flavoring material and arranged downstream of the air inlet. and a flavor substrate.

The use of a flavor substrate containing flavor materials to generate a flavor aerosol upon heating results in a uniform, highly consistent flavor that is entrained in the substrate aerosol generated by an aerosol-forming substrate positioned upstream of the flavor substrate. It may be desirable to generate an aerosol.

Providing the flavor substrate downstream of an air inlet included in the tubular element can be beneficial to control the amount of airflow provided to the flavor substrate. This may allow for customization of flavored aerosols. This may also improve the concentration of flavor aerosols generated by the flavor substrate upon heating.

The flavoring material may be configured to be fluid permeable when the temperature of the flavoring material is equal to or greater than the permeability transition temperature of the flavoring material; The material may be configured to be substantially fluid-impermeable when below the permeability transition temperature of the material.

Thus, flavor substrates can be used to provide greater control over the overall resistance to withdrawal (RTD) of an aerosol-generating article. In particular, flavored substrates may be advantageously used to allow for a potential reduction in RTD due to changes in the permeability of the gel composition during use.

The tubular element preferably defines at least one airflow channel that establishes uninterrupted fluid communication between an upstream location within the tubular element and a downstream location within the tubular element. The tubular element preferably defines at least one airflow channel establishing uninterrupted fluid communication between the upstream end of the tubular element and the downstream end of the tubular element. The flavor substrate is configured to allow fluid flowing along the at least one airflow channel to flow downstream of the flavor substrate when the temperature of the flavor material is equal to or greater than the permeability transition temperature of the flavor material. Preferably, the configuration is configured. Preferably, the flavor substrate is configured to prevent fluid flowing along the at least one airflow channel from flowing downstream of the flavor substrate when the temperature of the flavor material is below the permeability transition temperature of the flavor material.

To allow airflow to flow toward the downstream end, the flavor substrate may not extend across the entire cross-section of the airflow channel.

Alternatively, the flavor substrate may block the airflow channels. The flavor substrate may extend across the cross-section of one or more of the plurality of airflow channels to block airflow toward the downstream end. In this manner, the flavor substrate may extend over approximately 100 percent of the cross-section of the airflow channel. The flavor substrate may extend over at least about 25 percent of the cross-section of the airflow channel. The flavor substrate may extend over at least about 50 percent of the cross-section of the airflow channel. The flavor substrate may extend over at least about 75 percent of the cross-section of the airflow channel.

Similarly, flavor substrates can be used to alter airflow within an aerosol-generating article depending on changes in the permeability of the flavor material during use. This may be particularly useful for aerosol generating articles having at least two airflow channels when the flavor substrate is placed within one of the airflow channels.

The flavoring material may include a gel composition. Gel compositions can be advantageous in that they can produce particularly uniform and highly consistent flavor aerosols that are entrained in the substrate aerosol generated by an aerosol-forming substrate positioned upstream of the flavor substrate.

As used herein, the "permeability transition temperature" of a material is the temperature at which the permeability of the material changes dramatically upon heating or cooling of the material. It can be established that at temperatures below the permeability transition temperature, the material is substantially fluid-impermeable, and at temperatures equal to or above the permeability transition temperature, the material is fluid-permeable.

The flavoring material may be configured to be fluid permeable at 85 degrees Celsius. The flavoring material may be configured to be substantially fluid-impermeable at 20 degrees Celsius.

The permeability transition temperature of the material may be the phase transition temperature of the material. When heated to a phase transition temperature, a material can change phase from solid to liquid. Upon cooling to a phase transition temperature, the material can change phase from liquid to solid.

If the flavor material comprises a gel composition, the permeability transition temperature of the gel composition may be the phase transition temperature of the gel composition such that the flavor substrate is heated to the phase transition temperature of the gel composition. , the gel composition may change phase from a solid gel to a liquid, and when the flavor substrate is cooled to the phase transition temperature of the gel composition, the gel composition may change phase from a liquid to a solid gel. You can.

The gel composition can be configured to be fluid permeable at 85 degrees Celsius. The gel composition can be configured to be substantially fluid-impermeable at 20 degrees Celsius.

The flavoring material may be thermoreversible. The gel composition may be thermoreversible.

As used herein, "thermoreversible" refers to a material, such as a flavoring material, whose properties (particularly permeability) are such that the material can be heated or cooled to a temperature corresponding to its original state. You can return it to its original state by doing so. In particular, if the material is at a first temperature below its permeability transition temperature such that the material has a first permeability such that the material is substantially fluid impermeable, then a second permeability such that the material becomes fluid permeable. and finally, when the material is cooled to the first temperature, the permeability of the material returns substantially to the first permeability. Similarly, if the material is at a first temperature above its permeability transition temperature such that the material has a first permeability such that it is fluid permeable, then the material becomes substantially fluid impermeable. Upon cooling below its permeability transition temperature to reach the second permeability, and finally heating the material to the first temperature, the permeability of the material returns substantially to the first permeability.

Advantageously, by providing a thermoreversible material, including a thermoreversible gel, and in particular a thermoreversible flavoring material, such as a flavoring material, the aerosol generating device can reduce the withdrawal resistance, the amount of airflow within the article, or the flavoring substrate. The article may be configured to repeatedly vary the properties of the aerosol-generating article during use, such as the amount of aerosol generated upon heating of the article. In particular, the properties of the aerosol-generating articles may be restored to their original state.

The permeability transition temperature of flavor materials such as gel compositions can be between 70 degrees Celsius and 80 degrees Celsius.

A permeability transition temperature of 70 degrees Celsius to 80 degrees Celsius may be advantageous in that this temperature can be easily reached by heating the flavor substrate with an aerosol generator. This may facilitate changing the properties of the aerosol generating article during use.

Flavoring materials such as gel compositions may preferably include an alkaloid compound selected from the group consisting of nicotine, anatabine, and combinations thereof.

Flavored materials such as gel compositions may include nicotine. The amount of nicotine can be from about 0.1% to about 4%, preferably from about 0.1% to about 2% nicotine.

The term "nicotine" refers to nicotine and nicotine derivatives (eg, free base nicotine, nicotine salts, and the like).

Flavored materials such as gel compositions may include flavoring agents. Flavoring agents may include coffee derivative flavoring agents containing menthol, caffeine, guarana, taurine, glucuronolactone, or any combination thereof. Flavored materials such as gel compositions may contain about 0.2% to 4% flavoring agent, preferably about 0.4% to 2%. Flavoring agents may include menthol extract. The menthol extract may have at least about 55 percent menthol (C ₁₀ H ₂₀ O). Flavoring agents may include vanilla extract. The vanilla extract may have at least about 20% vanillin (C ₈ H ₈ O ₃ ).

Flavor materials such as gel compositions may include glycerin. The amount of glycerin may be about 50% to about 75%, preferably about 50% to about 65%.

Flavor materials such as gel compositions may include hydroxypolymethylcellulose (HPMC). The amount of HPMC can be about 15% to about 35%, preferably about 18% to about 32%, more preferably about 20% to about 30%, more preferably about 21% to about 27%.

Flavor materials such as gel compositions may include agar. The amount of agar may be about 3% to about 10%, preferably about 4% to about 7%.

Flavor materials such as gel compositions may include fiber. The amount of fiber may be from about 0.1% to about 12%, preferably from about 0.1% to 7%. The fibers may include cellulose fibers. The fibers may have a length of at least about 8 micrometers. The fibers may have a length of less than about 15 micrometers. The fibers may have a length of about 8 micrometers to about 15 micrometers.

Flavor materials such as gel compositions may include low methoxyl (E440i) pectin. The amount of low methoxyl (E440i) pectin can be from about 0.1% to about 9%, preferably from about 0.1% to 7%.

Flavor materials such as gel compositions may include lactic acid. The amount of lactic acid can be about 1.7% to about 3.1%, preferably about 2.1% to about 2.9%.

Flavor materials such as gel compositions may include calactate. The amount of calactate may be from about 0.1% to about 7%, preferably from about 0.1% to about 3%.

The above amounts are expressed in weight percentages. Preferably, the amounts of this disclosure are given in weight percentages.

The term "cannabinoid compound" refers to any one type of naturally occurring compounds found in parts of the cannabis plants Cannabis sativa, Cannabis indica, and Cannabis ruderalis. means. Cannabinoid compounds are particularly concentrated in female flower heads. Cannabinoid compounds naturally occurring in the cannabis plant include cannabidiol (CBD) and tetrahydrocannabinol (THC). In this disclosure, the term "cannabinoid compound" is used to describe both naturally occurring and synthetically produced cannabinoid compounds.

Flavored materials such as gel compositions include cannabidiol (CBD), tetrahydrocannabinol (THC), tetrahydrocannabinolic acid (THCA), cannabidiolic acid (CBDA), cannabinol (CBN), cannabigerol (CBG), Cannabichromene (CBC), Cannabicyclol (CBL), Cannabivarin (CBV), Tetrahydrocannabivarin (THCV), Cannabidivarin (CBDV), Cannabichromevaline (CBCV), Cannabigerovarin (CBGV), Cannabigerol Cannabinoid compounds selected from the group consisting of monomethyl ether (CBGM), cannabiersoin (CBE), cannabicitrane (CBT), and combinations thereof.

The flavoring material may include hydroxypropyl methylcellulose. The flavor material may have a hydroxypropyl methyl cellulose content of greater than about 0.5 weight percent. Advantageously, the inventors have discovered that hydroxypropyl methylcellulose can be an effective binder for flavor materials.

The flavoring material may have a hydroxypropyl methylcellulose content of greater than about 1 weight percent. The flavor material may have a hydroxypropyl methyl cellulose content of greater than about 5 weight percent. The flavoring material may have a hydroxypropyl methylcellulose content of greater than about 10 weight percent. The flavor material may have a hydroxypropyl methylcellulose content greater than about 15 weight percent. The flavoring material may have a hydroxypropyl methylcellulose content of greater than about 20 weight percent.

The flavor material may have a hydroxypropyl methylcellulose content of less than about 50 weight percent. The flavor material may have a hydroxypropyl methylcellulose content of less than about 45 weight percent. The flavor material may have a hydroxypropyl methylcellulose content of less than about 40 weight percent. The flavor material may have a hydroxypropyl methyl cellulose content of less than about 35 weight percent. The flavor material may have a hydroxypropyl methyl cellulose content of less than about 30 weight percent. The flavor material may have a hydroxypropyl methyl cellulose content of less than about 25 weight percent. The flavor material may have a hydroxypropyl methylcellulose content of less than about 20 weight percent.

The flavor material can have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 50 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 45 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 40 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 35 weight percent. The flavor material may have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 30 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 25 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 20 weight percent.

The flavor material can have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 40 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 1 weight percent to about 40 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 5 weight percent to about 40 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 10 weight percent to about 40 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 15 weight percent to about 40 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 20 weight percent to about 40 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 25 weight percent to about 40 weight percent.

The flavor material can have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 45 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 1 weight percent to about 45 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 1 weight percent to about 40 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 5 weight percent to about 40 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 5 weight percent to about 35 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 10 weight percent to about 35 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 10 weight percent to about 30 weight percent. The flavor material may have a hydroxypropyl methylcellulose content of about 15 weight percent to about 30 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 15 weight percent to about 25 weight percent. The flavor material can have a hydroxypropyl methylcellulose content of about 20 weight percent to about 25 weight percent.

The flavor material may have a cellulosic enhancer content of greater than about 0.5 weight percent. The flavor material may have a cellulosic enhancer content of greater than about 1 weight percent. The flavor material may have a cellulosic enhancer content of greater than about 5 weight percent. The flavor material may have a cellulosic enhancer content of greater than about 10 weight percent. The flavor material may have a cellulosic enhancer content of greater than about 15 weight percent. The flavor material may have a cellulosic enhancer content of greater than about 20 weight percent.

The flavor material may have a cellulosic enhancer content of less than about 50 weight percent. The flavor material may have a cellulosic enhancer content of less than about 45 weight percent. The flavor material may have a cellulosic enhancer content of less than about 40 weight percent. The flavor material may have a cellulosic enhancer content of less than about 35 weight percent. The flavor material may have a cellulosic enhancer content of less than about 30 weight percent. The flavor material may have a cellulosic enhancer content of less than about 25 weight percent. The flavor material may have a cellulosic enhancer content of less than about 20 weight percent. The flavor material may have a cellulosic enhancer content of less than about 15 weight percent.

The flavor material can have a cellulosic enhancer content of about 0.5 weight percent to about 50 weight percent. The flavor material can have a cellulosic enhancer content of about 0.5 weight percent to about 45 weight percent. The flavor material can have a cellulosic enhancer content of about 0.5 weight percent to about 40 weight percent. The flavor material can have a cellulosic enhancer content of about 0.5 weight percent to about 35 weight percent. The flavor material can have a cellulosic enhancer content of about 0.5 weight percent to about 30 weight percent. The flavor material can have a cellulosic enhancer content of about 0.5 weight percent to about 25 weight percent. The flavor material can have a cellulosic enhancer content of about 0.5 weight percent to about 20 weight percent. The flavor material can have a cellulosic enhancer content of about 0.5 weight percent to about 15 weight percent. The flavor material can have a cellulosic enhancer content of about 0.5 weight percent to about 10 weight percent. The flavor material can have a cellulosic enhancer content of about 0.5 weight percent to about 5 weight percent.

The flavor material can have a cellulosic enhancer content of about 1 weight percent to about 40 weight percent. The flavor material can have a cellulosic enhancer content of about 5 weight percent to about 40 weight percent. The flavor material can have a cellulosic enhancer content of about 10 weight percent to about 40 weight percent. The flavor material can have a cellulosic enhancer content of about 15 weight percent to about 40 weight percent. The flavor material can have a cellulosic enhancer content of about 20 weight percent to about 40 weight percent. The flavor material can have a cellulosic enhancer content of about 25 weight percent to about 40 weight percent. The flavor material may have a cellulosic enhancer content of about 30 weight percent to about 40 weight percent. The flavor material may have a cellulosic enhancer content of about 35 weight percent to about 40 weight percent.

The flavor material can have a cellulosic enhancer content of about 1 weight percent to about 35 weight percent. The flavor material can have a cellulosic enhancer content of about 5 weight percent to about 35 weight percent. The flavor material can have a cellulosic enhancer content of about 5 weight percent to about 30 weight percent. The flavor material can have a cellulosic enhancer content of about 10 weight percent to about 30 weight percent. The flavor material can have a cellulosic enhancer content of about 10 weight percent to about 25 weight percent. The flavor material can have a cellulosic enhancer content of about 15 weight percent to about 25 weight percent. The flavor material can have a cellulosic enhancer content of about 15 weight percent to about 20 weight percent.

The one or more cellulosic reinforcements may include cellulose fibers. Advantageously, the inventors have discovered that cellulose fibers can be a cellulosic toughening agent that is particularly effective in increasing the tensile strength of flavor materials.

The flavor material may have a cellulose fiber content of greater than about 0.5 weight percent. The flavor material may have a cellulose fiber content of greater than about 1 weight percent. The flavor material may have a cellulose fiber content of greater than about 5 weight percent. The flavor material may have a cellulose fiber content of greater than about 10 weight percent. The flavor material may have a cellulose fiber content of greater than about 15 weight percent. The flavor material may have a cellulose fiber content of greater than about 20 weight percent.

The flavor material may have a cellulose fiber content of less than about 50 weight percent. The flavor material may have a cellulose fiber content of less than about 45 weight percent. The flavor material may have a cellulose fiber content of less than about 40 weight percent. The flavor material may have a cellulose fiber content of less than about 35 weight percent. The flavor material may have a cellulose fiber content of less than about 30 weight percent. The flavor material may have a cellulose fiber content of less than about 25 weight percent. The flavor material may have a cellulose fiber content of less than about 20 weight percent. The flavor material may have a cellulose fiber content of less than about 15 weight percent.

The flavor material can have a cellulose fiber content of about 0.5 weight percent to about 50 weight percent. The flavor material can have a cellulose fiber content of about 0.5 weight percent to about 45 weight percent. The flavor material can have a cellulose fiber content of about 0.5 weight percent to about 40 weight percent. The flavor material can have a cellulose fiber content of about 0.5 weight percent to about 35 weight percent. The flavor material can have a cellulose fiber content of about 0.5 weight percent to about 30 weight percent. The flavor material can have a cellulose fiber content of about 0.5 weight percent to about 25 weight percent. The flavor material can have a cellulose fiber content of about 0.5 weight percent to about 20 weight percent. The flavor material can have a cellulose fiber content of about 0.5 weight percent to about 15 weight percent. The flavor material can have a cellulose fiber content of about 0.5 weight percent to about 10 weight percent. The flavor material can have a cellulose fiber content of about 0.5 weight percent to about 5 weight percent.

The flavor material can have a cellulose fiber content of about 1 weight percent to about 40 weight percent. The flavor material can have a cellulose fiber content of about 5 weight percent to about 40 weight percent. The flavor material can have a cellulose fiber content of about 10 weight percent to about 40 weight percent. The flavor material can have a cellulose fiber content of about 15 weight percent to about 40 weight percent. The flavor material can have a cellulose fiber content of about 20 weight percent to about 40 weight percent. The flavor material can have a cellulose fiber content of about 25 weight percent to about 40 weight percent. The flavor material can have a cellulose fiber content of about 30 weight percent to about 40 weight percent. The flavor material can have a cellulose fiber content of about 35 weight percent to about 40 weight percent.

The flavor material can have a cellulose fiber content of about 1 weight percent to about 35 weight percent. The flavor material can have a cellulose fiber content of about 5 weight percent to about 35 weight percent. The flavor material can have a cellulose fiber content of about 5 weight percent to about 30 weight percent. The flavor material can have a cellulose fiber content of about 10 weight percent to about 30 weight percent. The flavor material can have a cellulose fiber content of about 10 weight percent to about 25 weight percent. The flavor material can have a cellulose fiber content of about 15 weight percent to about 25 weight percent. The flavor material can have a cellulose fiber content of about 15 weight percent to about 20 weight percent.

The one or more cellulosic reinforcements may include microcrystalline cellulose. Advantageously, the inventors have discovered that microcrystalline cellulose can be a cellulosic toughening agent that is particularly effective in increasing the tensile strength of flavor materials.

The flavor material may have a microcrystalline cellulose content of greater than about 0.5 weight percent. The flavor material may have a microcrystalline cellulose content of greater than about 1 weight percent. The flavor material may have a microcrystalline cellulose content of greater than about 5 weight percent. The flavor material may have a microcrystalline cellulose content of greater than about 10 weight percent. The flavor material may have a microcrystalline cellulose content of greater than about 15 weight percent. The flavor material may have a microcrystalline cellulose content of greater than about 20 weight percent.

The flavor material may have a microcrystalline cellulose content of less than about 50 weight percent. The flavor material may have a microcrystalline cellulose content of less than about 45 weight percent. The flavor material may have a microcrystalline cellulose content of less than about 40 weight percent. The flavor material may have a microcrystalline cellulose content of less than about 35 weight percent. The flavor material may have a microcrystalline cellulose content of less than about 30 weight percent. The flavor material may have a microcrystalline cellulose content of less than about 25 weight percent. The flavor material may have a microcrystalline cellulose content of less than about 20 weight percent. The flavor material may have a microcrystalline cellulose content of less than about 15 weight percent.

The flavor material can have a microcrystalline cellulose content of about 0.5 weight percent to about 50 weight percent. The flavor material can have a microcrystalline cellulose content of about 0.5 weight percent to about 45 weight percent. The flavor material can have a microcrystalline cellulose content of about 0.5 weight percent to about 40 weight percent. The flavor material can have a microcrystalline cellulose content of about 0.5 weight percent to about 35 weight percent. The flavor material can have a microcrystalline cellulose content of about 0.5 weight percent to about 30 weight percent. The flavor material can have a microcrystalline cellulose content of about 0.5 weight percent to about 25 weight percent. The flavor material can have a microcrystalline cellulose content of about 0.5 weight percent to about 20 weight percent. The flavor material can have a microcrystalline cellulose content of about 0.5 weight percent to about 15 weight percent. The flavor material can have a microcrystalline cellulose content of about 0.5 weight percent to about 10 weight percent. The flavor material can have a microcrystalline cellulose content of about 0.5 weight percent to about 5 weight percent.

The flavor material can have a microcrystalline cellulose content of about 1 weight percent to about 40 weight percent. The flavor material can have a microcrystalline cellulose content of about 5 weight percent to about 40 weight percent. The flavor material can have a microcrystalline cellulose content of about 10 weight percent to about 40 weight percent. The flavor material can have a microcrystalline cellulose content of about 15 weight percent to about 40 weight percent. The flavor material can have a microcrystalline cellulose content of about 20 weight percent to about 40 weight percent. The flavor material may have a microcrystalline cellulose content of about 25 weight percent to about 40 weight percent. The flavor material may have a microcrystalline cellulose content of about 30 weight percent to about 40 weight percent. The flavor material may have a microcrystalline cellulose content of about 35 weight percent to about 40 weight percent.

The flavor material can have a microcrystalline cellulose content of about 1 weight percent to about 35 weight percent. The flavor material can have a microcrystalline cellulose content of about 5 weight percent to about 35 weight percent. The flavor material can have a microcrystalline cellulose content of about 5 weight percent to about 30 weight percent. The flavor material can have a microcrystalline cellulose content of about 10 weight percent to about 30 weight percent. The flavor material can have a microcrystalline cellulose content of about 10 weight percent to about 25 weight percent. The flavor material can have a microcrystalline cellulose content of about 15 weight percent to about 25 weight percent. The flavor material can have a microcrystalline cellulose content of about 15 weight percent to about 20 weight percent.

The one or more cellulosic reinforcements may include cellulose powder. Advantageously, the inventors have discovered that cellulose powder can be a cellulosic toughening agent that is particularly effective in increasing the tensile strength of flavor materials.

The flavor material may have a cellulose powder content of greater than about 0.5 weight percent. The flavor material may have a cellulose powder content of greater than about 1 weight percent. The flavor material may have a cellulose powder content of greater than about 5 weight percent. The flavor material may have a cellulose powder content of greater than about 10 weight percent. The flavor material may have a cellulose powder content of greater than about 15 weight percent. The flavor material may have a cellulose powder content of greater than about 20 weight percent.

The flavor material may have a cellulose powder content of less than about 50 weight percent. The flavor material may have a cellulose powder content of less than about 45 weight percent. The flavor material may have a cellulose powder content of less than about 40 weight percent. The flavor material may have a cellulose powder content of less than about 35 weight percent. The flavor material may have a cellulose powder content of less than about 30 weight percent. The flavor material may have a cellulose powder content of less than about 25 weight percent. The flavor material may have a cellulose powder content of less than about 20 weight percent. The flavor material may have a cellulose powder content of less than about 15 weight percent.

The flavor material can have a cellulose powder content of about 0.5 weight percent to about 50 weight percent. The flavor material can have a cellulose powder content of about 0.5 weight percent to about 45 weight percent. The flavor material can have a cellulose powder content of about 0.5 weight percent to about 40 weight percent. The flavor material can have a cellulose powder content of about 0.5 weight percent to about 35 weight percent. The flavor material can have a cellulose powder content of about 0.5 weight percent to about 30 weight percent. The flavor material can have a cellulose powder content of about 0.5 weight percent to about 25 weight percent. The flavor material can have a cellulose powder content of about 0.5 weight percent to about 20 weight percent. The flavor material may have a cellulose powder content of about 0.5 weight percent to about 15 weight percent. The flavor material may have a cellulose powder content of about 0.5 weight percent to about 10 weight percent. The flavor material can have a cellulose powder content of about 0.5 weight percent to about 5 weight percent.

The flavor material can have a cellulose powder content of about 1 weight percent to about 40 weight percent. The flavor material may have a cellulose powder content of about 5 weight percent to about 40 weight percent. The flavor material may have a cellulose powder content of about 10 weight percent to about 40 weight percent. The flavor material can have a cellulose powder content of about 15 weight percent to about 40 weight percent. The flavor material can have a cellulose powder content of about 20 weight percent to about 40 weight percent. The flavor material can have a cellulose powder content of about 25 weight percent to about 40 weight percent. The flavor material can have a cellulose powder content of about 30 weight percent to about 40 weight percent. The flavor material may have a cellulose powder content of about 35 weight percent to about 40 weight percent.

The flavor material can have a cellulose powder content of about 1 weight percent to about 35 weight percent. The flavor material can have a cellulose powder content of about 5 weight percent to about 35 weight percent. The flavor material can have a cellulose powder content of about 5 weight percent to about 30 weight percent. The flavor material can have a cellulose powder content of about 10 weight percent to about 30 weight percent. The flavor material may have a cellulose powder content of about 10 weight percent to about 25 weight percent. The flavor material may have a cellulose powder content of about 15 weight percent to about 25 weight percent. The flavor material may have a cellulose powder content of about 15 weight percent to about 20 weight percent.

The flavoring material may include carboxymethyl cellulose. Advantageously, using carboxymethylcellulose may help reduce crusting of flavor materials when used in aerosol-generating articles. In some instances, the use of carboxymethylcellulose eliminates crusting. As used herein, "crusting" is interpreted as the formation of a solid layer on the components of an aerosol-generating article. The inventors have discovered that crusting can occur because components of the flavor material can melt and then resolidify around the components of the aerosol-generating article. Crusting can be a particular problem when the flavoring material is used in an aerosol generator containing a susceptor. If a crust forms on the susceptor, the susceptor with the crust becomes less effective in heating the flavoring material, which may result in reduced nicotine delivery to the user and/or reduced aerosol formation from the flavored material. can bring about

Carboxymethylcellulose may include sodium carboxymethylcellulose. Advantageously, the inventors have discovered that sodium carboxymethylcellulose is a carboxymethylcellulose that may be particularly effective in preventing the crusting problems mentioned above.

The flavoring material may have a carboxymethyl cellulose content greater than about 0.5 weight percent. The flavoring material may have a carboxymethylcellulose content of greater than about 1 weight percent. The flavoring material may have a carboxymethyl cellulose content of greater than about 5 weight percent. The flavoring material may have a carboxymethylcellulose content greater than about 10 weight percent.

The flavor material may have a carboxymethyl cellulose content of less than about 20 weight percent. The flavor material may have a carboxymethyl cellulose content of less than about 15 weight percent. The flavoring material may have a carboxymethyl cellulose content of less than about 10 weight percent. The flavor material may have a carboxymethyl cellulose content of less than about 8 weight percent. The flavoring material may have a carboxymethyl cellulose content of less than about 5 weight percent.

The flavor material can have a carboxymethylcellulose content of about 0.5 weight percent to about 20 weight percent. The flavor material can have a carboxymethyl cellulose content of about 0.5 weight percent to about 15 weight percent. The flavor material can have a carboxymethylcellulose content of about 0.5 weight percent to about 10 weight percent. The flavor material can have a carboxymethylcellulose content of about 0.5 weight percent to about 8 weight percent. The flavor material can have a carboxymethyl cellulose content of about 0.5 weight percent to about 5 weight percent.

The flavor material can have a carboxymethylcellulose content of about 1 weight percent to about 20 weight percent. The flavor material can have a carboxymethyl cellulose content of about 5 weight percent to about 20 weight percent. The flavor material can have a carboxymethylcellulose content of about 8 weight percent to about 20 weight percent. The flavor material can have a carboxymethylcellulose content of about 10 weight percent to about 20 weight percent. The flavor material can have a carboxymethylcellulose content of about 15 weight percent to about 20 weight percent.

The flavor material can have a carboxymethyl cellulose content of about 1 weight percent to about 15 weight percent. The flavor material can have a carboxymethylcellulose content of about 1 weight percent to about 10 weight percent. The flavor material can have a carboxymethyl cellulose content of about 5 weight percent to about 10 weight percent. The flavor material can have a carboxymethylcellulose content of about 5 weight percent to about 8 weight percent.

Flavor materials such as gel compositions may have a homogeneous distribution. Similarly, flavor materials such as gel compositions may be distributed in a variable manner within the flavor matrix.

The flavor substrate may include an outer layer. The outer layer may be useful in giving the flavor substrate the necessary shape for placement within the aerosol generating article.

The outer layer may be made of the same material as the rest of the flavor substrate, such as a flavor material.

If the flavor substrate includes an outer layer, the flavor substrate may be manufactured by first depositing a core containing the remainder of the flavor substrate and then depositing layers on the core to form the outer layer. This may enable an efficient method of providing flavor substrates for manufacturing aerosol-generating articles. The core and the outer layer may advantageously be manufactured by extrusion. The outer layer may be flavor-free.

Flavor materials, such as gel compositions, may be configured to be in the solid state within a temperature range covering standard environmental temperatures for use in aerosol-generating articles. A suitable range of temperature may be -20 degrees Celsius to 70 degrees Celsius.

When the flavor material, such as a gel composition, is in a solid state, it must have sufficient resistance to deformation to provide the flavor matrix with mechanical stability for handling during manufacture, transportation, and use of the aerosol-generating article. may be configured. The resistance to deformation strength of the flavor substrate can be from about 0.5 kgf to about 3 kgf, preferably from about 1.3 kgf to about 2.7 kgf, more preferably from about 1.9 kgf to about 2.5 kgf.

The resistance to deformation strength of flavor materials, such as gel compositions, can be adjusted as desired by adjusting the composition of the flavor material. For example, adjusting the amount of low methoxyl (LM) pectin within a flavor material can affect the flavor material's resistance to deformation strength. The amount of low methoxyl (LM) pectin may be about 0.5 percent to about 5 percent, preferably about 1 percent to about 3 percent.

Advantageously, the gel composition may be solid at room temperature. "Solid" in this context means that the gel has a stable size and shape and does not flow. Room temperature in this context means 25 degrees Celsius. A gel may be defined as a substantially dilute cross-linked system that exhibits no fluidity at steady state. Gels may be almost liquid on a weight basis, yet they behave like solids due to the three-dimensional crosslinked network within the liquid. Crosslinks within the fluid give the gel its structure (hardness). Thus, a gel may be a dispersion of molecules of a liquid within a solid with liquid particles dispersed in a solid medium.

The gel composition has a viscosity of 1,000,000 to about 1 Pascals per second, preferably 100,000 to 10 Pascals per second, preferably 10,000 to 1,000 Pascals per second, or 1,000 Pascals per second to provide the desired viscosity. It may have a viscosity of ˜100 Pascals per second, or from 500 to 200 Pascals per second. The viscosity of the gel composition was determined by measuring the viscosity of the sample using an Anton Paar MCR 302 rheometer with a parallel plate PP25 equipped with P-PTD200 + H-PTD200 measuring cells at 25 °C and a shear rate of 1 s ^-1 . can be measured by

The mass of the gel composition may not change by more than about 20%, or may not change by more than about 15%, or may change by more than about 10% when exposed to various environmental storage conditions. There may be cases where it does not change. The composition has an exposed surface area that does not change by more than about 10%, or does not change by more than about 5%, or does not change by more than about 1% when exposed to various environmental conditions. It may have an external shape.

The gel composition can have a mass that is greater than about 20% when exposed to 24 degrees Celsius and one atmospheric pressure or a relative humidity in the range of about 10% to about 60% under typical storage conditions. does not change by more than about 15%, or does not change by more than about 10%.

The gel composition does not change by more than about 10%, or does not change by more than about 5% when exposed to relative humidity in the range of about 10% to about 60% at 24 degrees Celsius and one atmosphere of pressure. or may have an outer shape with an exposed surface area that does not vary by more than about 1%.

The gel composition can have an exposed surface area value (m ² ) and a mass value (kg), where the mass value to exposed surface area value is from about 0.05:1 to about 1:1, or from about 0.1:1 to In the range of about 1:1, or about 0.5:1 to about 1:0.1, or about 0.5:1 to about 1:0.5.

Advantageously, gel compositions can provide a predictable composition form during storage or transportation from manufacture to consumer. The gel composition may substantially maintain its shape. Gel compositions may release substantially no liquid phase during storage or transportation from manufacture to consumer.

The gel composition of any permeability control element, such as a flavor substrate or spanning element, may include at least glycerin. The gel composition of any permeability control element, such as a flavor substrate or spanning element, may include at least HPMC. The gel composition of any permeability control element, such as a flavor substrate or spanning element, may include at least agar. The gel composition of any permeability control element, such as a flavor substrate or spanning element, may include at least lactic acid.

The gel composition of any permeability control element, such as a flavor substrate or spanning element, can include at least glycerin and HPMC.

The gel composition of any permeability control element, such as a flavor substrate or spanning element, may include at least glycerin, HPMC, and agar.

The gel composition of any permeability control element, such as a flavor substrate or spanning element, can include at least glycerin, HPMC, agar, and lactic acid.

The gel composition may have a glycerin content of about 52 weight percent. The gel composition may have a hydroxypolymethylcellulose content of about 21.5 weight percent. The gel composition may have a nicotine content of about 1.5 weight percent. The gel composition may have an agar content of about 7.6 weight percent. The gel composition may have a fiber content of about 9 weight percent. The fibers may be cellulose fibers from about 8 to about 15 micrometers long. The gel composition may have a low methoxyl pectin (E440i) content of about 4 weight percent. The gel composition may have a lactic acid content of about 2.3 weight percent. The gel composition may have a Ca-lactic acid content of about 2.1 weight percent.

The gel composition may have a glycerin content of about 53 weight percent. The gel composition may have a hydroxypolymethylcellulose content of about 21 weight percent. The gel composition may have a nicotine content of about 1.1 weight percent. The gel composition may have an agar content of about 8 weight percent. The gel composition may have a fiber content of about 6.8 weight percent. The fibers may be cellulose fibers from about 8 to about 15 micrometers long. The gel composition may have a low methoxyl pectin (E440i) content of about 5 weight percent. The gel composition may have a lactic acid content of about 2.1 weight percent. The gel composition may have a Ca-lactic acid content of about 1 weight percent. The gel composition may have a menthol extract (FDA 21CFR182.20) with a menthol (C ₁₀ H ₂₀ O) content of about 2 weight percent and a minimum of 55 percent.

The gel composition may have a glycerin content of about 61 weight percent. The gel composition may have a hydroxypolymethylcellulose content of about 21 weight percent. The gel composition may have a nicotine content of about 1.8 weight percent. The gel composition may have an agar content of about 3 weight percent. The gel composition may have a fiber content of about 7.2 weight percent. The fibers may be cellulose fibers from about 8 to about 15 micrometers long. The gel composition may have a low methoxyl pectin (E440i) content of about 3 weight percent. The gel composition may have a lactic acid content of about 3 weight percent.

The gel composition may have a glycerin content of about 60 weight percent. The gel composition may have a hydroxypolymethylcellulose content of about 22 weight percent. The gel composition may have a nicotine content of about 1.8 weight percent. The gel composition may have an agar content of about 2.4 weight percent. The gel composition may have a fiber content of about 5.3 weight percent. The fibers may be cellulose fibers from about 8 to about 15 micrometers long. The gel composition may have a low methoxyl pectin (E440i) content of about 4 weight percent. The gel composition may have a lactic acid content of about 2.8 weight percent. The gel composition may have about 1 weight percent Ca-lactic acid composition. The gel composition may have vanilla extract (FDA 21CFR169.175) and has a vanillin (C ₈ H ₈ O ₃ ) content of at least 20 percent of about 1.7 weight percent.

The withdrawal resistance of the aerosol-generating article when the temperature of the flavoring material is equal to or above the permeability transition temperature of the flavoring material is the resistance of the aerosol-generating article when the temperature of the flavoring material is below the permeability transition temperature of the flavoring material It may be at least about 10 mm H ₂ O greater than the withdrawal resistance.

As discussed above, the permeability of flavor materials, such as gel compositions, included in a flavor substrate can be altered by cooling or heating the flavor substrate at an appropriate temperature. In particular, the flavor material contained in the flavor matrix can become fluid permeable when heated to its permeability transition temperature. This may allow variations in the withdrawal resistance of the aerosol-generating article and can be easily achieved and determined. With respect to withdrawal resistance of the aerosol-generating article when the temperature of the flavoring material is below the permeability transition temperature of the flavoring material, when the temperature of the flavoring material is equal to or higher than the permeability transition temperature of the flavoring material. A difference of at least about 10 mm H ₂ O between withdrawal resistances of aerosol generating articles is advantageous in that it can result in a significant change in user experience.

More preferably, the withdrawal resistance of the aerosol-generating article when the temperature of the flavoring material is equal to or above the permeability transition temperature of the flavoring material is the same as when the temperature of the flavoring material is below the permeability transition temperature of the flavoring material. It may be at least about 20 mm H ₂ O greater than the withdrawal resistance of the aerosol generating article. Even more preferably, the withdrawal resistance of the aerosol-generating article when the temperature of the flavoring material may be equal to or higher than the permeability transition temperature of the flavoring material is such that the temperature of the flavoring material is greater than the permeability transition temperature of the flavoring material. It may be at least about 30 mm H ₂ O greater than the withdrawal resistance of the aerosol generating article at low temperatures.

The withdrawal resistance of the aerosol-generating article when the temperature of the flavoring material is below the permeability transition temperature of the flavoring material is greater than about 20 mm _H2O , even more preferably greater than about 30 mm _H2O , even more preferably. may be greater than about 40 mm _H2O , even more preferably greater than about 50 mm _H2O , and most preferably greater than about 60 mm _H2O .

The withdrawal resistance of the aerosol-generating article when the temperature of the flavoring material is equal to or greater than the permeability transition temperature of the flavoring material is less than about 50 mm _H2O , and even more preferably less than about 40 mm _H2O . may also be low, even more preferably less than about 30 mm H ₂ O, even more preferably less than about 20 mm H ₂ O, and most preferably less than about 10 mm H ₂ O.

The distance between the upstream end of the aerosol-forming substrate and the downstream end of the flavor substrate may be less than about 40 millimeters, preferably less than about 30 millimeters, and even more preferably less than about 20 millimeters.

The distance between the upstream end of the aerosol-forming substrate and the downstream end of the flavor substrate within such a range is such that the substrate aerosol generated upon heating of the aerosol-forming substrate and the flavor aerosol generated upon heating of the flavor substrate blend are controlled by the user. When forming an inhalable aerosol, it may be beneficial to generate a more consistent aerosol.

The tubular element may have a length of about 3.9 mm to about 8 mm, preferably about 4.4 mm to about 7.8 mm.

The ratio between the length of the tubular element and the length of the aerosol generating article can be from about 0.2 to about 0.45, more preferably from about 0.25 to 0.35.

A tubular element having such a length, or such a relative length compared to the length of the aerosol-generating article, is capable of dispersing the substrate aerosol generated upon heating of the aerosol-forming substrate, the flavor aerosol generated upon heating the flavor substrate, and the air. Mixing of outside air drawn into the tubular element through the inlet may also be improved.

The aerosol generating article may include an adjustment member disposed on and movable relative to the tubular element such that the adjustment member is configured to vary the size of the air inlet.

Providing an adjustment member to vary the size of the air inlet may be advantageous in controlling the amount of airflow within the aerosol generating article during use. The regulating member can be used in place of or in conjunction with the flavoring material to regulate the amount of airflow within the aerosol-generating article during use. This may allow the regulation of airflow within the aerosol generating article to be more versatile.

The adjustment member and the tubular element may be linearly movable with respect to each other. The adjustment member and the tubular element may be configured to rotate with respect to each other. The adjustment member and the tubular element may be configured to rotate and move linearly with respect to each other, for example by means of threads.

The tubular element may include an inner tube and an outer tube, the outer tube being disposed about the inner tube, the outer airflow channel being longitudinally separated by the inner tube and the outer tube, and the inner airflow channel being separated by the inner tube. at least the inner airflow channel is adapted to flow the substrate aerosol toward the downstream end.

Providing an inner airflow channel and an outer airflow channel within the tubular element may enable the existence of at least two independent airflow paths within the tubular element. The inner airflow channel is typically adapted to allow substrate aerosol generated upon heating of the aerosol-forming substrate to flow toward the downstream end. The outer airflow channel typically includes an air inlet so that the external airflow can be separated from the airflow path within the inner airflow channel. The outer airflow channel may also be adapted to allow the substrate aerosol to flow towards the downstream end.

A flavor substrate may be placed within the outer airflow channel. This may be advantageous in that flavor materials such as gel compositions may be configured to modulate airflow within the outer airflow channel. This may also enhance control of the airflow through which the flavor substrate is provided.

The aerosol generating article can further comprise at least one permeability control element, the at least one permeability control element having a temperature that is equal to the permeability transition temperature of the at least one permeability control element. The at least one permeability control element is configured to be fluid permeable when the temperature of the at least one permeability control element is equal to or greater than the permeability of the at least one permeability control element. the at least one permeability control element is disposed within the outer airflow channel, the at least one permeability control element being configured to be substantially fluid impermeable when below the transition temperature; preventing fluid from flowing along the outer airflow channel downstream of the permeability control element when the temperature of the at least one permeability control element is below the permeability transition temperature of the at least one permeability control element; allowing fluid to flow along the outer airflow channel downstream of the permeability control element when the temperature of the control element is equal to or greater than the permeability transition temperature of the at least one permeability control element; It is composed of

At least one permeability control element may be advantageous for regulating the amount of airflow along the outer airflow channel. The at least one permeability control element may advantageously allow adjustment of the withdrawal resistance of the aerosol-generating article. At least one permeability control element may be advantageously used to adjust the amount of airflow to which the flavor substrate is provided. Accordingly, the at least one transparency control element may improve customization of the user experience.

The flavor substrate may be a permeability control element. The flavor substrate may be a permeability control element. The permeability control element can be a flavor substrate. This may allow for optimized design of aerosol-generating articles in which the flavor substrate also contributes to modulating airflow within the outer airflow channel. The aerosol generating article may include only one permeability control element. If the aerosol generating article includes only one permeability control element, the flavor substrate may be the only permeability control element.

The aerosol generating article may include multiple permeability control elements. If the aerosol generating article includes multiple permeability control elements, the flavor substrate may be one of the multiple permeability control elements. When the aerosol generating article includes multiple permeability control elements, the permeability transition temperatures of the multiple permeability control elements can be substantially the same temperature. Similarly, if the aerosol generating article includes multiple permeability control elements, the multiple permeability control elements may have different permeability transition temperatures with respect to each other.

The at least one permeability control element prevents fluid from flowing along the outer airflow channel downstream of the permeability control element when the temperature of the at least one permeability control element is 20 degrees Celsius; It may be configured to allow fluid to flow along the outer airflow channel downstream of the permeable control element when the temperature of the control element is 85 degrees Celsius.

A permeability control element that is substantially fluid impermeable at 20 degrees Celsius and fluid permeable at 85 degrees Celsius is desirable for achieving regulation of airflow within the outer airflow channel using an aerosol generator. There are cases.

The permeability transition temperature of the at least one permeability control element can be between 70 degrees Celsius and 80 degrees Celsius.

At least one permeability control element may include a gel composition. The gel composition of the at least one permeability control element may be according to any gel composition described herein. The gel composition of the at least one permeability control element may be according to any gel composition described herein that is free of nicotine or flavoring agents. The gel composition of at least one permeability control element that is not flavor-based may be according to any gel composition described herein that is free of nicotine or flavoring agents.

As detailed above, the gel composition can be useful in providing at least one permeability control element having the necessary change in permeability as a function of temperature.

However, other materials other than gel compositions that also exhibit changes in permeability as a function of temperature may be used.

Materials such as gel compositions may be thermoreversible.

The permeability transition temperature of the at least one permeability control element may be the phase transition temperature of the at least one permeability control element.

A permeability control element may be placed downstream of the flavor substrate. This configuration may be beneficial for allowing control of the amount of flavor aerosol that is entrained in the substrate aerosol generated upon heating of the aerosol-forming substrate.

The spanning element may be positioned within the outer airflow channel upstream of the flavor substrate.

Spanning elements may be useful for regulating or impeding the flow of substrate aerosol into the outer airflow channel.

The spanning element may be a transparency control element.

If the spanning element is a permeability control element, adjustment of the flow of substrate aerosol into the outer airflow channel may advantageously be achieved by varying the permeability of the spanning element.

The flavor substrate may extend longitudinally along the entire outer airflow channel. This allows for controlled adjustment of the airflow along the outer airflow channel and the flow of the substrate aerosol into the outer airflow channel, making the flavor substrate more versatile.

The outer airflow channel may include an air intake. As a result, the outer airflow channel can be utilized to regulate the flow of outside air to the aerosol-generating article. This may enhance the customization of the aerosol that can be inhaled by the user.

The air inlet may be located downstream of the spanning element.

By locating the air inlet downstream of the spanning element, the outer airflow channel may be configured to selectively or permanently obstruct the flow of substrate aerosol into the outer airflow channel. Thus, the outer airflow channel may be configured to exclusively regulate the intake of outside air into the aerosol-generating article and, if the flavor substrate is disposed within the outer airflow channel, independent of the flow of the substrate aerosol. The flavor aerosol flow then flows along the outer airflow channel.

If the spanning element is a permeability control element, the substrate aerosol may be directed into the outer airflow channel. This may contribute to improving the mixing of flavor aerosol, substrate aerosol, and ambient air to generate an aerosol that can be inhaled by the user.

The tubular element may be positioned immediately downstream of the aerosol-forming substrate.

This configuration, in which no intermediate parts are placed between the aerosol-forming substrate and the tubular element, allows the substrate aerosol generated upon heating of the aerosol-forming substrate to be efficiently entrained by the flavor aerosol generated upon heating of the flavor substrate. It can be beneficial to ensure that.

The aerosol generating article may include a filter longitudinally disposed downstream of the tubular element.

The term "filter" refers to an aerosol-generating article configured to at least partially remove gas phase or particulate phase components, or both gas and particulate phase components, from the mainstream aerosol drawn through the filter. used to indicate a section of

The filter may be longitudinally disposed immediately downstream of the tubular element.

Since the tubular element can be useful and sufficient to provide customization of the aerosol formed according to the user's preferences, the filter can be placed immediately downstream of the tubular element, i.e. without intermediate parts such as an aerosol cooling element. Good too. Thus, aerosol-generating articles can achieve reduced gas and particulate phase components while requiring fewer production steps and allowing for a more consistent experience.

However, the aerosol generating article may include an aerosol cooling element downstream of the tubular element. Preferably, the aerosol cooling element may be placed between the tubular element and the filter.

The aerosol generating article may include a mouthpiece located at the upstream end of the aerosol generating article. Providing a mouthpiece may be desirable to facilitate inhalation of the aerosol by the user.

The aerosol-generating article can include a wrapper surrounding at least a portion of the aerosol-generating article. Advantageously, such a wrapper may prevent the user from touching the aerosol-forming substrate, which helps maintain a high level of hygiene. The wrapper may be made from any suitable material. In particular, the wrapper may be formed from a porous material. The wrapper may be made of a material that allows volatile compounds to be released from the material when the wrapper is placed around the downstream section of the aerosol generating article.

Advantageously, the wrapper may hold together multiple components of the aerosol-generating article. For example, a wrapper may hold the aerosol-forming substrate and tubular element together. If the aerosol generating article includes a filter, the wrapper may hold the filter and tubular element together.

Advantageously, providing one or more wrappers may improve the structural integrity of the aerosol-generating article.

The components of the aerosol generating article may be secured together by any suitable means. For example, the aerosol generating article may include a connection mechanism. The connecting mechanism may help hold the components of the aerosol generating article together.

If a wrapper is provided surrounding at least a portion of the aerosol-generating article and the aerosol-generating article includes a connection mechanism, the wrapper may be configured to apply pressure to the connection mechanism.

The aerosol-forming substrate may have any suitable cross-section. For example, the substrate may have a circular, oval, stadium-shaped, rectangular, or triangular cross-sectional shape. Preferably, the substrate has a circular cross-sectional shape.

The solid aerosol-forming substrate may include a plug of tobacco. Tobacco plugs include, for example, powders, granules, pellets, fragments, strands, strips or sheets, including one or more of herbal leaves, tobacco leaves, tobacco stems, puffed tobacco and homogenized tobacco. may include one or more. The term "homogenized tobacco material" as used herein means a material formed by agglomerating particulate tobacco. Providing a homogenized tobacco material may improve aerosol generation and the nicotine content and flavor profile of the aerosol generated during heating of the aerosol-generating article. Specifically, the process of creating homogenized tobacco involves crushing tobacco leaves, which allows for more effective release of nicotine and flavor upon heating. If the tobacco plug comprises homogenized tobacco material, the homogenized tobacco material may be in the form of a sheet. The term "sheet" as used herein means a layered element having a width and length substantially greater than its thickness.

The solid aerosol-forming substrate may include homogenized tobacco material. The solid aerosol-forming material may include fragments, strands, or strips of homogenized tobacco material. The solid aerosol-forming substrate may include a sheet of homogenized tobacco material.

The aerosol-forming substrate can have a substantially homogeneous composition. The aerosol-forming substrate may have a composition that is substantially homogeneous at least along its longitudinal axis.

A homogenized sheet of tobacco material may be formed by agglomerating particulate tobacco obtained by crushing or otherwise comminuting one or both of tobacco leaf lamina and tobacco leaf stalk. The homogenized sheet of tobacco material may include, for example, one or more of tobacco dust, tobacco fines, and other particulate tobacco by-products formed during tobacco processing, handling, and transportation. A sheet of homogenized tobacco material is produced by casting a slurry containing particulate tobacco and one or more binders onto a conveyor belt or other supporting surface, and drying the cast slurry to homogenize a sheet of tobacco material. Preferably, it is formed by a casting process of the type that generally involves forming a sheet of homogenized tobacco material and removing a sheet of homogenized tobacco material from a supporting surface.

The solid aerosol-forming substrate may include a collection of sheets of homogenized tobacco material. As used herein, the term "collected" describes sheets that have been rolled, folded, or otherwise compressed or deflated substantially transversely to the longitudinal axis of the aerosol-generating article. used to.

The aerosol-forming substrate includes a collection of textured sheets of homogenized tobacco material. As used herein, the term "textured sheet" means a sheet that is crimped, embossed, debossed, perforated, or otherwise modified. The use of textured sheets of homogenized tobacco material may advantageously facilitate assembling the sheets of homogenized tobacco material to form an aerosol-forming substrate. The aerosol-forming substrate may include a collection of textured sheets of homogenized tobacco material including a plurality of spaced apart indentations, protrusions, perforations, or combinations thereof.

Preferably, the aerosol-forming substrate comprises a collection of crimped sheets of homogenized tobacco material. As used herein, the term "crimped sheet" means a sheet having a plurality of substantially parallel ridges or corrugations. Preferably, the substantially parallel ridges or undulations extend along or parallel to the longitudinal axis of the aerosol generating article. This advantageously facilitates collection of crimped sheets of homogenized tobacco material to form an aerosol-generating article. However, a crimped sheet of homogenized tobacco material for inclusion in an aerosol-generating article may include a plurality of substantially parallel ridges or undulations disposed at acute or obtuse angles to the longitudinal axis of the aerosol-generating article. It is recognized that it may have.

The aerosol-forming substrate may include tobacco-containing materials and non-tobacco-containing materials.

The aerosol-forming substrate may include an aerosol former. The aerosol-forming substrate may include a single aerosol former or a combination of two or more aerosol formers. As used herein, the term "aerosol former" refers to any suitable known body that facilitates the formation of an aerosol in use and that is substantially resistant to thermal decomposition at the operating temperature of the aerosol generating article. used to describe a compound or a mixture of compounds. Suitable aerosol formers include polyhydric alcohols (such as propylene glycol, triethylene glycol, 1,3-butanediol, and glycerin), esters of polyhydric alcohols (such as glycerol monoacetate, diacetate, or triacetate), and These include, but are not limited to, aliphatic esters of monocarboxylic, dicarboxylic, or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyl tetradecanedioate. Preferred aerosol formers are polyhydric alcohols such as propylene glycol, triethylene glycol, 1,3-butanediol, and most preferably glycerin, or mixtures thereof. The aerosol-forming substrate can have an aerosol former content of greater than 5 percent on a dry weight basis. The aerosol-forming substrate can have an aerosol former content of about 5 percent to about 30 percent on a dry weight basis. The aerosol-forming substrate can have an aerosol former content of about 20 percent on a dry weight basis.

Preferably, the aerosol-forming substrate includes homogenized tobacco material, an aerosol-forming body, and water.

The homogenized tobacco material may be provided in one of the following sheets: folded, crimped, or cut into strips. The sheet can be cut into strips having a width of about 0.2 mm to about 2 mm, more preferably about 0.4 mm to about 1.2 mm. The width of the strip may be about 0.9 millimeters.

The aerosol-forming substrate may include an internal cavity. In other words, the aerosol-forming substrate may be a tubular substrate. The aerosol-forming substrate may include an internal substrate surface having an internal substrate diameter, the internal substrate surface defining an internal cavity extending longitudinally within the aerosol-forming substrate. Providing an inner cavity within the aerosol-forming substrate allows the heating element to be inserted into the aerosol-forming substrate within the cavity without penetrating the substrate and without changing the structure of the substrate. It can be. Providing an inner cavity may also be beneficial to further reduce the thickness of the aerosol-forming substrate and enhance the heat transfer benefits discussed above.

If the aerosol-forming substrate includes an internal substrate surface that defines an inner cavity, the internal substrate surface may have the same cross-sectional shape as the external substrate surface. In particular, the substrate inner surface may have a substantially circular, oval or stadium-shaped cross-section.

The aerosol generating article may include a layer of thermally conductive material. The layer of thermally conductive material may cover at least a portion of the aerosol-forming substrate that would otherwise be exposed. A layer of thermally conductive material may be disposed on at least the outer surface of the substrate. A layer of thermally conductive material may be disposed on at least the inner surface of the substrate. A layer of thermally conductive material may be disposed on at least the inner surface of the substrate and the outer surface of the substrate. By providing a layer of thermally conductive material on an otherwise exposed substrate surface, heat from a heating element received by or engaged with the substrate is transferred to a larger area of the aerosol-forming substrate. distribution, and the heat transfer efficiency between the heating element and the aerosol-forming substrate can be improved. The layer of thermally conductive material may also create a physical separation between the heating element received within the inner cavity and the aerosol-forming substrate, which overheats the aerosol-forming substrate in the region of the substrate near the heating element. can reduce the risk of The layer of thermally conductive material may also increase the robustness of the tubular aerosol-forming substrate, which may be reduced by reducing the thickness of the substrate by providing an internal cavity.

As used herein, the term "thermal conductivity" means at least 10 W/m K, preferably at least 40 W/m K, more preferably at least 100 W at 23 degrees Celsius and 50% relative humidity. Refers to a material with a thermal conductivity of /m·K. Preferably, the layer of thermally conductive material has a thermal conductivity of at least 40 W/m·K, preferably at least 100 W/m·K, more preferably at least 150 W/m·K, even more at 23 degrees Celsius and 50% relative humidity. It may preferably include a material having a thermal conductivity of at least 200 W/m·K.

Examples of suitable conductive materials include, but are not limited to, aluminum, copper, zinc, nickel, silver, and combinations thereof.

The aerosol-forming substrate may have a rod comprising a plurality of elongated tubular elements. The elongate tubular element may include tobacco material. The plurality of elongated tubular elements included in the aerosol-forming substrate should not be confused with tubular elements located downstream of the aerosol-forming substrate.

By adjusting the number, equivalent diameter, and thickness of the elongated tubular elements of the rod, it may be advantageously possible to adjust the density and porosity of the rod. Generally, an aerosol-forming substrate comprising a plurality of elongated tubular elements of homogenized tobacco may advantageously exhibit a more uniform density than an aerosol-forming substrate comprising fragments of tobacco material. The geometry of the elongate tubular element may be such that a particularly stable channel is provided for airflow along the rod. This may advantageously allow consistent fine-tuning of the RTD so that aerosol-forming substrates with a given RTD can be manufactured in a consistent manner and with great precision.

The weight of an aerosol-forming substrate containing elongated tubular elements of homogenized tobacco may be determined by the number, size, density, and spacing of the tubular elements. This reduces the weight discrepancy between aerosol-forming substrates of the same dimensions, such that the weight of the aerosol-forming substrate is outside the selected tolerance range compared to an aerosol-forming substrate containing pieces of tobacco material. , can result in low rejection rates of aerosol-forming substrates.

Varying the thickness of the elongate tubular elements in the rod may also be advantageously used to adjust the homogenized tobacco content in the rod. For example, in an elongated tubular element formed from a rolled strip of homogenized tobacco web, the thickness of the elongated tubular element can be adjusted by varying the number of wraps of the strip around the longitudinal axis. , or by varying the thickness of the homogenized tobacco web itself. This may increase design flexibility compared to aerosol generating articles comprising pieces of tobacco material.

The size, geometry, and arrangement of the elongated tubular elements in the rod can be easily adapted to facilitate insertion of the heating element into the rod of the aerosol-generating article. The tubular element lies substantially straight within the rod and extends longitudinally, which may facilitate insertion of longitudinally extending internal heating elements (such as heater blades). A regular arrangement of elongated tubular elements in the rod may also advantageously favor optimization of heat transfer from the heating element through the rod.

Insertion of the heater of an aerosol generating device into an aerosol-forming substrate containing pieces of tobacco material (and removal of the heater from the aerosol-forming substrate) can tend to cause the pieces of tobacco material to detach from the aerosol-forming substrate. This may require more frequent cleaning of the heater element and other parts of the aerosol generator to remove loose fragments. In contrast, insertion of the heater of an aerosol generator into and removal from an aerosol-forming substrate comprising a plurality of elongated tubular elements of homogenized tobacco material advantageously significantly reduces the tendency for the material to flake off. obtain.

A rod comprising a plurality of elongated tubular elements can be made in a continuous process that can be performed efficiently at high speeds and that can be conveniently integrated into existing production lines for the manufacture of aerosol-generating articles.

Preferably, the rod of the aerosol-forming substrate has an outer diameter approximately equal to the outer diameter of the aerosol-generating article.

The rod of the aerosol-forming substrate may have an outer diameter of at least 5 millimeters. The rod of the aerosol-forming substrate may have an outer diameter of about 5 mm to about 12 mm, such as about 5 mm to about 10 mm, or about 6 mm to about 8 mm. Preferably, the rod of the aerosol-forming substrate may have an outer diameter of 7.2 mm ± 10 percent.

The rod of the aerosol-forming substrate may have a length of about 5 millimeters to about 100 mm. Preferably, the rod of the aerosol generating substrate has a length of at least about 5 millimeters, more preferably at least about 7 millimeters. The rods of the aerosol generating substrate preferably have a length of less than about 80 millimeters, more preferably less than about 65 millimeters, and even more preferably less than about 50 millimeters. Preferably, the rods of the aerosol generating substrate may have a length of less than about 35 millimeters, more preferably less than 25 millimeters, and even more preferably less than about 20 millimeters. The rods of the aerosol-forming substrate may have a length of about 10 millimeters, and the rods of the aerosol-forming substrate may have a length of about 12 millimeters.

The rod of the aerosol-forming substrate may have a substantially uniform cross-section along the length of the rod. It may be preferred that the rod of the aerosol-forming substrate has a substantially circular cross-section.

The rod comprising the elongated tubular element may be surrounded by a wrapper. The elongated tubular elements may be assembled such that the elongated tubular elements extend longitudinally.

The plurality of elongated tubular elements of the rod of the aerosol-generating article according to the invention may be formed of homogeneous tobacco material, which may contain particulate tobacco obtained by grinding. All of the plurality of elongate tubular elements may have substantially the same composition as each other. Similarly, the plurality of elongated tubular elements may include tubular elements of at least two different compositions.

At least one elongated tubular element within the rod may include a rolled strip cut from a sheet or web of homogenized tobacco material.

The sheet or web of homogenized tobacco material is at least about 40 weight percent on a dry weight basis, more preferably at least about 60 weight percent on a dry weight basis, more preferably or at least about 70 weight percent on a dry weight basis, and most preferably may have a tobacco content of at least about 90 weight percent on a dry weight basis.

The sheet or web of homogenized tobacco material used in the aerosol-forming substrate may contain one or more endogenous binders (i.e., tobacco endogenous binders) to assist in agglomerating the particulate tobacco. The above-mentioned extrinsic binders (ie, tobacco extrinsic binders), or combinations thereof, may be included. The sheet of homogenized tobacco material used in the aerosol-forming substrate contains tobacco and non-tobacco fibers, aerosol formers, wetting agents, plasticizers, flavoring agents, fillers, aqueous and non-aqueous solvents, and combinations thereof. Other additives may also be included, including but not limited to.

Suitable extrinsic binders for inclusion in sheets or webs of homogenized tobacco material for use in aerosol-forming substrates are well known in the art and include gums (e.g., guar gum, xanthan gum, gum arabic, locust bean gum, etc.), cellulose-based Binders (such as hydroxypropylcellulose, carboxymethylcellulose, hydroxyethylcellulose, methylcellulose, and ethylcellulose), polysaccharides (such as starch, organic acids (such as alginic acid), conjugated base salts of organic acids (such as sodium alginate), agar, pectin, etc. ), and combinations thereof.

Suitable non-tobacco fibers for inclusion in sheets or webs of homogenized tobacco material for use in aerosol-forming substrates are well known in the art and include cellulose fibers, softwood fibers, hardwood fibers, jute fibers, and combinations thereof; Not limited to these. Prior to inclusion in sheets of homogenized tobacco material for use in the aerosol-forming substrate, the non-tobacco fibers may be processed by any suitable process known in the art, including mechanical pulping, refining, chemical pulping, etc. Examples include, but are not limited to, pulping, bleaching, sulfate pulping, and combinations thereof.

The sheet or web of homogenized tobacco material may include an aerosol former.

The homogenized tobacco sheets or webs used in the aerosol-generating articles of the present invention are made by methods well known in the art, such as those disclosed in International Patent Publication No. A-2012/164009 A2. Good too. Sheets of homogenized tobacco material for use in aerosol-generating articles may be formed from a slurry comprising particulate tobacco, guar gum, cellulose fibers, and glycerin by a casting process.

Alternatively, elongated tubular elements of homogenized tobacco material for use in aerosol-forming substrates according to the invention may be formed by extrusion. As an example, a slurry containing particulate tobacco obtained by grinding or otherwise comminuting tobacco leaf lamina may be forced through a die of a desired cross-section. Additionally, additive manufacturing may also be used to produce tubular elements of homogenized tobacco material.

The elongate tubular element can have an equivalent diameter of about 0.03 millimeters to about 3 millimeters. Preferably, the elongate tubular element may have an equivalent diameter of at least about 0.1 millimeter. More preferably, the elongated tubular element may have an equivalent diameter of at least about 0.3 millimeters.

Similarly, it is preferred that the elongate tubular element may have an equivalent diameter of less than about 2 millimeters. More preferably, the elongated tubular element may have an equivalent diameter of less than about 1 millimeter.

The elongated tubular element may have an equivalent diameter of about 0.7 mm to about 2.7 mm, and the elongated tubular element may have an equivalent diameter of about 0.3 mm to about 1.1 mm. good.

If the elongated tubular element is formed by rolling a strip of homogenized tobacco material, the strip may have a width of at least about 1 millimeter. Preferably, the strip of homogenized tobacco material may have a width of at least about 2 millimeters. More preferably, the strip of homogenized material may have a width of at least about 3 millimeters.

The strips of homogenized tobacco material may have a width of about 1 millimeter to about 3.5 millimeters, and the strips of homogenized tobacco material may have a width of about 2.4 millimeters to about 8.2 millimeters. It may have a width.

The strips of homogenized tobacco material are cut from a sheet or web having a thickness of at least about 40 microns, more preferably at least about 60 microns, more preferably at least about 80 microns, and most preferably at least about 100 microns. Good too. Similarly, the homogenized strips of tobacco material are from a sheet or web having a thickness of about 5000 microns or less, more preferably about 2000 microns or less, more preferably about 1000 microns or less, and most preferably about 500 microns or less. May be severed. For example, the sheet or web may have a thickness of about 40 microns to about 5000 microns, more preferably about 60 microns to about 2000 microns, more preferably about 80 microns to about 1000 microns, and most preferably about 100 microns to about 500 microns. It may be.

The elongated tubular element may have a thickness of at least about 40 microns, more preferably at least about 80 microns, more preferably at least about 120 microns, and most preferably at least about 160 microns. Similarly, the elongated tubular element may have a thickness of less than about 5000 microns, more preferably less than about 2500 microns, and most preferably less than about 1000 microns.

The elongated tubular element may be formed of porous tobacco material so that air flows through the walls of the tubular element, ie, airflow along a substantially radial direction through the rod is unobstructed. Where the elongated tubular element is formed by wrapping a strip of homogenized tobacco material, the strip itself may be formed of porous tobacco material.

The term "porous" as used herein in connection with a homogenized tobacco material is defined as porous enough to permit air flow through the sheet or web in a direction transverse to the surface of the sheet or web. It may be indicated that the tobacco material was produced within a range of inherent porosity, such that fine pores or interstices are provided within the structure of the sheet or web. Similarly, the term "porous" may indicate that each sheet or web of tobacco material is provided with a plurality of airflow holes to provide the desired porosity. For example, a sheet of tobacco material may be perforated with a pattern of airflow holes before the winding operation is performed to create the elongated tubular element of the rod of aerosol-forming substrate. Airflow holes may be drilled randomly or uniformly across the sheet. The pattern of airflow holes may cover substantially the entire surface of the sheet, or may cover one or more specific areas of the sheet, with the remaining areas being free of airflow holes.

The strip of homogenized tobacco material that may form the elongated tubular element may be textured. For example, the sheet or web from which the strips are cut may be provided with a plurality of spaced apart indentations, protrusions, perforations, or combinations thereof. Texture may be provided on one side of each sheet or on both sides of each sheet.

Including one or more elongate tubular elements formed from crimped strips may help provide and maintain some spacing between adjacent tubular elements within the rod.

The additive may be applied to at least a portion of the surface of at least one of the plurality of tubular elements. The additives may be solid additives, liquid additives, or a combination of solid and liquid additives. Suitable solid and liquid additives for use in the present invention are well known in the art and include flavoring agents (e.g., menthol, etc.), adsorbents (e.g., activated carbon, etc.), fillers (e.g., carbonated calcium, etc.), and botanical additives.

The strip of homogenized tobacco material may be wrapped at least about 345 degrees about the longitudinal axis to form a substantially elongated tubular element. Preferably, the strip of homogenized tobacco material may be wrapped at least about 360 degrees about the longitudinal axis. More preferably, the strip of homogenized tobacco material may be wrapped at least about 540 degrees about the longitudinal axis. Similarly, the strip of homogenized tobacco material may preferably be wrapped less than about 1800 degrees about the longitudinal axis. More preferably, the strip of homogenized tobacco material may be wrapped less than about 900 degrees about the longitudinal axis. Preferably, the strip of homogenized tobacco material may be wrapped about the longitudinal axis from about 345 degrees to about 540 degrees.

Each elongate tubular element may have a length substantially equal to the length of the rod of the aerosol-forming substrate. Each elongate tubular element may have a length of about 10 millimeters, and each elongate tubular element may have a length of about 12 millimeters.

The rod of aerosol-forming substrate may comprise less than about 200 elongated tubular elements of homogenized tobacco material. More preferably, the rod of the aerosol-forming substrate may include less than about 150 elongated tubular elements. Even more preferably, the rod of the aerosol-forming substrate may comprise less than about 100 elongated tubular elements.

Similarly, the rod of the aerosol-forming substrate may include at least about 15 elongated tubular elements of homogenized tobacco material. More preferably, the rod of the aerosol-forming substrate comprises at least about 30 elongated tubular elements. Even more preferably, the rod of the aerosol-forming substrate may comprise at least about 40 elongated tubular elements. The rod of the aerosol-forming substrate can include from about 15 to about 100 strands of non-tobacco material.

In the rod of the aerosol-forming substrate, the elongated tubular elements may be aligned substantially parallel to each other.

The elongated tubular element of homogenized tobacco material may have a substantially oval cross-section, may have a substantially oval cross-section, and may have a substantially circular cross-section. Good too. As mentioned above, elongated tubular elements for use in aerosol generating articles can be effectively formed by wrapping a strip of homogenized tobacco material slightly less than 360 degrees around its longitudinal axis. This results in an element that effectively has a C-shaped cross-section, with the slit extending longitudinally over the entire length of the elongated tubular element.

The plurality of elongated tubular elements forming the rod of the aerosol-forming substrate may be surrounded by a wrapper. The wrapper may be formed of porous or non-porous sheet material. The wrapper may be formed of any suitable material or combination of materials. The wrapper may be a paper wrapper. The wrapper may optionally be adhered to the outer edges of the plurality of elongated tubular elements. For example, the inner surface of the wrapper and at least one of the outer edges of the plurality of elongate tubular elements may be moistened during the production process such that the inner wrapper adheres to the edges of the elongate tubular elements during the packaging process. Similarly, the adhesive may be applied to the inner surface of the wrapper and at least one of the outer edges of the plurality of elongated tubular elements upstream of the packaging process. Adhesion of the plurality of elongated tubular elements and the wrapper may advantageously help maintain the position and spacing of the plurality of elongated tubular elements within the rod.

The wrapper may be at least partially folded over the elongate tubular elements at the upstream and downstream ends of the rod to retain the plurality of elongate tubular elements within the rod. The wrapper may be on the periphery of the plurality of elongate tubular elements at the upstream and downstream ends of the rod such that the remaining portions of the elongate tubular elements are exposed. The wrapper may be over the entire upstream and downstream ends of the rod.

Separate rim sections of paper or other material may be attached to the wrapper to cover at least the outer periphery of the upstream and downstream ends of the elongate tubular element, as described above. An additional outer wrapper may be provided over the wrapper surrounding the plurality of elongated tubular elements when the wrapper is folded over the end of the rod or a separate rim section is provided.

Rods for use in aerosol generating articles as described above may be manufactured by the methods described below. In the first step of the method, a sheet or web of homogenized tobacco material may be provided. In a second step, elongated strips having longitudinal axes may be cut from the homogenized sheet or web of tobacco material. The cutting operation can be performed by feeding the sheet or web from a roll or bobbin and moving it continuously along a predetermined direction. Cutting means may be provided at the cutting station to which the web or sheet is fed. Mechanical cutters may be used for this purpose. Lasers can also be used.

In a third step, the strip may be rolled, ie wrapped around a longitudinal axis, to form an elongated tubular element. This may be achieved by feeding the strip along a predetermined direction into the funnel-shaped element such that the strip is coiled and formed into a wound elongated tubular element. Several individual wound elongated tubular elements may be manufactured in parallel.

In a fourth step, the plurality of elongated tubular elements obtained at the end of the third step may be assembled side by side such that the elongated tubular elements extend in the longitudinal direction. This may be accomplished by feeding the plurality of elongated tubular elements through separate funnel elements such that the plurality of elongated tubular elements are grouped in substantially cylindrical clusters.

In a fifth step, the assembled elongated tubular elements may be surrounded by a wrapper to form a continuous rod. In a sixth step, the continuous rod may be cut into multiple individual rods.

The method may include the further step of applying at least one aerosol former to the homogenized sheet or web of material prior to the step of cutting the sheet or web to obtain strips. The method may include the further step of applying at least one aerosol former to the elongate tubular element prior to the step of assembling the plurality of elongate tubular members side by side.

Additionally, the method may include the further step of applying at least one aerosol former to the plurality of elongated tubular elements after the plurality of elongated tubular elements are assembled side by side. Similarly, the method may include applying at least one aerosol former to the plurality of elongate tubular elements after cutting the continuous rod into individual rods.

The method may further include drying the homogenized tobacco material after applying the at least one aerosol former.

An aerosol generation system is also provided. The aerosol generation system may include any of the aerosol generation articles disclosed above and an aerosol generation device including a heater for heating the aerosol generation article. The heater may include a base heating element configured to heat the aerosol-forming substrate and a downstream heating element disposed downstream of the base heating element. The downstream heating element may be configured to heat the flavor substrate. The downstream heating element may be configured to heat the at least one permeability control element. The downstream heating element may be configured to heat the spanning element.

As used herein, the term "aerosol generation system" refers to a combination of an aerosol generation device and an aerosol generation article.

Because the aerosol generation system of the present disclosure comprises an aerosol generation article according to the above disclosure, the advantages described above for the aerosol generation article also apply to the system itself. In particular, the aerosol generator can be used to generate a substrate aerosol and a flavor aerosol upon heating of the aerosol-forming substrate and flavor substrate, respectively. The aerosol generating device may be used to achieve changes in the permeability of the flavor substrate, at least one permeability control element, spanning element, and any combination thereof, depending on the configuration of the aerosol generating article.

The base heating element and downstream heating element may be any suitable type of heating element. The base heating element may be an internal heating element. The downstream heating element may be an internal heating element. As used herein, the term "internal heating element" refers to a heating element that is configured to be inserted into an aerosol-forming or flavor substrate. The base heating element and the downstream heating element may be elongated heating elements. The elongated heating element may be blade-shaped. The elongated heating element may be pin-shaped. The elongated heating element may have a tapered shape or at least a tapered end. The elongated heating element may have a pointed end. The heating element may have a conical shape. The elongate heating element may have any suitable shape arranged to facilitate insertion of the heating element into the aerosol-forming or flavor substrate. Advantageously, the elongate heating element provides easier engagement or easier disengagement, or both easier engagement and easier disengagement, of the aerosol generating article and the heating element of the device. obtain.

The base heating element may be an external heating element. The downstream heating element may be an external heating element. As used herein, the term "external heating element" refers to a heating element configured to heat the outer surface of an aerosol-forming or flavor substrate. At least one external heating element may at least partially surround the cavity for receiving the aerosol-forming substrate or flavor substrate.

The heater may include at least one resistive heating element.

The base heating element may be a resistance heating element, ie, the heater may include a base resistance heating element. The downstream heating element may be a resistive heating element, ie, the heater may include a downstream resistive heating element.

The base resistance heating element and the downstream resistance heating element may be electrically connected in a parallel arrangement. Advantageously, providing multiple resistive heating elements electrically connected in a parallel arrangement reduces or minimizes the voltage required to provide the desired power while reducing the voltage applied to the heating elements. It may facilitate the delivery of desired power. Advantageously, reducing or minimizing the voltage required to operate the at least one heating element may facilitate reducing or minimizing the physical size of the power supply.

The at least one resistive heating element may include an electrically insulated substrate and one or more conductive tracks on the electrically insulated substrate.

The electrically insulated substrate may be stable at the operating temperature of the at least one heating element. The electrically insulated substrate is heated at a temperature of up to about 400 degrees Celsius, more preferably about 500 degrees Celsius, more preferably about 600 degrees Celsius, more preferably about 700 degrees Celsius, and most preferably about 800 degrees Celsius. It can be stable.

The operating temperature of the at least one resistive heating element in use may be at least about 200 degrees Celsius. The operating temperature of the at least one resistive heating element in use may be less than about 700 degrees Celsius. The operating temperature of the at least one resistive heating element in use may be less than about 600 degrees Celsius. The operating temperature of the at least one resistive heating element during use may be less than about 500 degrees Celsius. The operating temperature of the at least one resistive heating element in use may be less than about 400 degrees Celsius.

The electrically insulating substrate may include any suitable material. For example, the electrically insulating substrate can include one or more of paper, glass, ceramic, anodized metal, coated metal, and polyimide. The ceramic may include mica, alumina (Al ₂ O ₃ ) or zircona (ZrO _{2 )} . The electrically insulating substrate may have a thermal conductivity of about 40 watts/meter Kelvin or less, preferably about 20 watts/meter Kelvin or less, and ideally about 2 watts/meter Kelvin or less.

Suitable materials for forming the resistive heating element, and in particular the one or more conductive tracks, include semiconductors such as doped ceramics, "conductive" ceramics (such as molybdenum disilicide), carbon, graphite, Examples include, but are not limited to, metals, metal alloys, and composite materials made of ceramic and metal materials. Such composite materials may include doped or undoped ceramics. An example of a suitable doped ceramic is doped silicon carbide. Examples of suitable metals include titanium, zirconium, tantalum, and platinum group metals. Examples of suitable metal alloys include stainless steel, nickel-containing, cobalt-containing, chromium-containing, aluminum-containing, titanium-containing, zirconium-containing, hafnium-containing, niobium-containing, molybdenum-containing, tantalum-containing, tungsten-containing, tin-containing, gallium-containing. , manganese-containing, and iron-containing alloys, as well as nickel, iron, cobalt, stainless steel-based superalloys, Timetal®, and iron-manganese-aluminum-based alloys.

A resistive heating element may include one or more stamped sections of electrically resistive material (such as stainless steel). The at least one resistive heating element may include a heating wire or filament, such as a Ni-Cr, platinum, tungsten or alloy wire.

The heater may include at least one induction heating device.

The substrate heating element may be an induction heating device, ie, the heater may include a substrate induction heating device. The downstream heating element may be an induction heating device, ie, the heater may include a downstream induction heating device.

The at least one induction heating device may include at least one inductor coil. The at least one induction heating device may include a base inductor coil. The at least one induction heating device may include a downstream inductor coil. The inductor coil is arranged to generate a varying magnetic field upon receiving varying current from the power source. Such varying current may be from about 5 kilohertz to about 500 kilohertz. The varying current may be a high frequency varying current. As used herein, the term "high frequency fluctuating current" means fluctuating current having a frequency of about 500 kilohertz to about 30 megahertz. The high frequency varying current may have a frequency of about 1 MHz to about 30 MHz (such as about 1 MHz to about 10 MHz, or about 5 MHz to about 8 MHz). The varying current may be an alternating current that generates an alternating magnetic field.

The inductor coil may have any suitable form. For example, the inductor coil may be a flat inductor coil. A flat inductor coil may be helically wound in a substantially plane. Preferably, the inductor coil may be a tubular inductor coil. Typically, a tubular inductor coil may be helically wound about a longitudinal axis. The inductor coil may be elongated. Particularly preferably, the inductor coil may be an elongated tubular inductor coil. The inductor coil may have any suitable cross-section. For example, the inductor coil may have a circular, oval, square, rectangular, triangular, or other polygonal cross-section.

The inductor coil may be formed from any suitable material. The inductor coil may be formed from a conductive material. Preferably, the inductor coil may be formed from metal or metal alloy.

As used herein, "conductive" refers to a material that has an electrical resistivity of 1 x 10-4 ohm-meters (Ω-m) or less at 20 degrees Celsius.

The at least one induction heating device may include at least one susceptor. The at least one induction heating device may include a substrate susceptor. The at least one induction heating device may include a downstream susceptor. As used herein, the term "susceptor" refers to an element that includes a material that has the ability to convert magnetic energy into heat. When the susceptor is placed in a varying magnetic field, such as a varying magnetic field generated by an inductor coil, the susceptor becomes heated. For example, if the substrate susceptor is positioned in a varying magnetic field generated by a subscribing inductor coil, the substrate susceptor may be heated, and if the downstream susceptor is positioned in a varying magnetic field generated by a downstream inductor coil, the downstream susceptor may be heated. The susceptor may be heated.

Heating of the susceptor may be the result of hysteresis losses and/or eddy currents induced within the susceptor, depending on the electrical properties and magnetic properties of the susceptor material. Hysteresis losses occur in ferromagnetic or ferrimagnetic susceptor materials due to magnetic domains in the material that are switched under the influence of a varying electromagnetic field. Eddy currents can be induced if the susceptor material is electrically conductive. In the case of electrically conductive ferromagnetic or ferrimagnetic susceptor materials, heat can be generated by both eddy currents and hysteresis losses. The susceptor may therefore be heatable by at least one of hysteresis losses or eddy currents, depending on the electrical properties and magnetic properties of the susceptor material.

The susceptor may be arranged such that the oscillating electromagnetic field generated by the inductor coil induces a current in the susceptor and heats the susceptor when the aerosol generating article is received in the aerosol generating device. The aerosol generator is capable of generating a fluctuating electromagnetic field having a magnetic field strength (H field strength) of 1 to 5 kiloamperes per meter (kA/m), preferably 2 to 3 kA/m, such as about 2.5 kA/m. It is preferable that there be. Preferably, the aerosol generator is capable of generating a fluctuating electromagnetic field having a frequency of 1 to 30 MHz, such as 1 to 10 MHz, such as 5 to 7 MHz.

The susceptor may include any suitable material. The susceptor may be formed from any material that can be inductively heated to a temperature sufficient to release volatile compounds from the aerosol-forming or flavor substrate. Preferred susceptors may be heated to temperatures in excess of about 250 degrees Celsius. Preferred susceptors may be formed from electrically conductive materials. Suitable materials for the susceptor include graphite, molybdenum, silicon carbide, stainless steel, niobium, aluminum, nickel, nickel-containing compounds, titanium, and composites of metallic materials. Preferred susceptors may include metal or carbon. Some preferred susceptors may include, for example, ferromagnetic materials such as ferritic iron, ferromagnetic alloys such as ferromagnetic steel or stainless steel, ferromagnetic particles, and ferrites. Some preferred susceptors may be comprised of ferromagnetic materials. A suitable susceptor may include aluminum. A suitable susceptor may be made of aluminum. The susceptor may include at least about 5 percent, at least about 20 percent, at least about 50 percent, or at least about 90 percent ferromagnetic or paramagnetic material.

Preferably, the susceptor may be formed from a material that is substantially impermeable to gas. In other words, it is preferred that the susceptor can be formed from a material that is not gas permeable.

The susceptor may have any suitable form. For example, the susceptor may be elongated. The susceptor may have any suitable cross-section. For example, the susceptor may have a circular, oval, square, rectangular, triangular, or other polygonal cross-section. The susceptor may be tubular.

The susceptor may include a susceptor layer provided on a support. Placing a susceptor in a varying magnetic field induces eddy currents in close proximity to the susceptor surface, resulting in an effect called the skin effect. Thus, the susceptor can be formed from a relatively thin layer of susceptor material while ensuring that the susceptor is effectively heated in the presence of a varying magnetic field. Fabricating a susceptor from a support and a relatively thin susceptor layer can facilitate the manufacture of simple, inexpensive, and robust aerosol-generating articles.

The support may be formed from a material that is not susceptible to induction heating. Advantageously, this can reduce the heating of the surface of the susceptor that is not in contact with the aerosol-forming substrate, where the surface of the support forms the surface of the susceptor that is not in contact with the aerosol-forming substrate. .

The support may include an electrically insulating material. As used herein, "electrical insulation" refers to a material that has an electrical resistivity of at least 1 x 104 ohm meters (Ωm) at 20 degrees Celsius.

Forming the support from a thermally insulating material may provide a thermally insulating barrier between the susceptor layer and other components of the induction heating device, such as an inductor coil surrounding the induction heating element. Advantageously, this can reduce heat transfer between the susceptor and other components of the induction heating system.

The insulating material may also have a bulk thermal diffusivity of about 0.01 square centimeters per second (cm ² /s) or less, as measured using laser flash techniques. Providing a support with such a thermal diffusivity may result in a support with high thermal inertia, which reduces heat transfer between the susceptor layer and the support and reduces the temperature of the support. Fluctuations can be reduced.

The susceptor may be provided with a protective outer layer, for example a protective ceramic layer or a protective glass layer. A protective outer layer may improve the durability of the susceptor and facilitate cleaning of the susceptor. The protective outer layer may substantially surround the susceptor. The susceptor may include a protective coating formed from glass, ceramic, or inert metal.

The susceptor may have any suitable dimensions. The susceptor may have a length of about 5 mm to about 15 mm, such as about 6 mm to about 12 mm, or about 8 mm to about 10 mm. The susceptor may have a width of about 1 mm to about 8 mm, such as about 3 mm to about 5 mm. The susceptor may have a thickness of about 0.01 mm to about 2 mm. When the susceptor has a constant cross-section, for example a circular cross-section, the susceptor may have a preferred width or diameter of about 1 millimeter to about 5 millimeters.

The susceptor may be located within the device cavity. The susceptor may extend into the device cavity in a longitudinal direction of the device cavity. The susceptor may be elongated. The elongated susceptor may be blade-shaped. The elongated susceptor may be pin-shaped. The elongate susceptor may have a tapered shape or at least a tapered end. The elongated susceptor may have a pointed end. The elongated element may be conically shaped.

The substrate susceptor may be an internal heating element configured to be inserted at least partially into the aerosol-forming substrate of the aerosol-generating article when the aerosol-generating article is received within the device cavity. If the aerosol-forming substrate includes an inner cavity, the substrate susceptor may be configured to be at least partially inserted into the inner cavity of the aerosol-forming substrate when the aerosol-generating article is received within the device cavity.

The downstream susceptor may be an internal heating element configured to be inserted at least partially into the flavor substrate of the aerosol-generating article when the aerosol-generating article is received within the device cavity.

The substrate susceptor may be an external heating element configured to at least partially surround the cavity for receiving the aerosol-forming substrate.

The downstream susceptor may be an external heating element configured to at least partially surround the cavity for receiving the flavor substrate.

The induction heating device may include at least one internal heating element and at least one external heating element.

The heater may include at least one resistive heating element and at least one inductive heating element. The heater may include a combination of resistive and inductive heating elements.

The aerosol generator may include a power source. The power source may be a DC voltage source. The power source may be a battery. For example, the power source may be a nickel metal hydride battery, a nickel cadmium battery, or a lithium-based battery (eg, a lithium cobalt battery, a lithium iron phosphate battery, or a lithium polymer battery). The power source may be another form of charge storage device, such as a capacitor. The power source may require recharging and may have a capacity to store sufficient energy to use the aerosol generator.

A power source may be electrically connected to the heater to power heating elements, such as a base heating element and a downstream heating element. When the heating element receives power from a power source, the heating element may generate heat. The power source may be configured to provide sufficient power to the substrate heating element to heat the aerosol-forming substrate to a temperature at which volatile compounds are released from the aerosol-forming substrate. The power source may be configured to provide sufficient power to the downstream heating element to heat the flavor substrate to a temperature at which volatile compounds are released from the flavor substrate. the power source for heating the at least one permeability control element to a temperature at which the at least one permeability control element is fluid permeable, i.e., heating the at least one permeability control element to its permeability transition temperature; The downstream heating element may be configured to provide sufficient power to the downstream heating element.

The aerosol generator may include a housing. The housing may at least partially define a cavity for receiving an aerosol-generating article.

The aerosol generating device may include at least one device air inlet in fluid communication with the cavity. When the aerosol generating device includes a housing, the housing may at least partially define the air inlet of the at least one device. The housing may define an air inlet for the base device proximate the distal end of the cavity. It may be desirable for the air inlet of the substrate device to allow ambient air to be drawn into the upstream end of the aerosol-forming substrate. The housing may define an air intake for the downstream device. The air inlet of the downstream device may be advantageous to allow ambient air to be drawn into the air inlet of the tubular element. The air inlet of the downstream device may be configured to substantially mate with the air inlet of the tubular element when the aerosol-generating article is fully introduced into the cavity to receive the aerosol-generating article.

The aerosol generator may include a controller. The controller may be configured to control power delivery from the power source to the heating element. The controller may be any suitable controller. The controller may include any suitable electrical circuitry and components. The controller may include a processor and memory. The controller may include a microprocessor, which may be a programmable microprocessor.

The aerosol generating device may include a sensor for detecting airflow indicative of the user inhaling smoke. The airflow sensor may be an electromechanical device. Airflow sensors may be any of mechanical, optical, opto-mechanical, and microelectromechanical systems (MEMS) based sensors. The aerosol generator may include a manually operable switch for the user to initiate a puff.

The aerosol generating device may include an indicator to indicate when the at least one heating element is activated. The indicator may include a light that is activated when at least one heating element is activated.

The aerosol generating device may include at least one electrical connector. The at least one electrical connector may be configured to charge the power source. At least one electrical connector may be configured to connect to another electrical device. The at least one electrical connector may include an outer plug or socket with at least one outer electrical contact that allows the aerosol generating device to be connected to another electrical device. For example, the aerosol generation device may include a USB plug or USB socket that allows the aerosol generation device to be connected to another USB-enabled device. For example, a USB plug or socket may enable connection of the aerosol generator to a USB charging device to charge a rechargeable power source within the aerosol generator. The USB plug or socket may support data transfer to and from the aerosol generating device, or both. Similarly, the aerosol generating device may be connected to a computer to transfer data to the device, such as a new heating profile for a new aerosol generating article.

When the aerosol generating device includes a USB plug or socket, the aerosol generating device may further include a removable cover that covers the USB plug or socket when not in use. When the USB plug or socket is a USB plug, the USB plug may be selectively retractable within the device.

The invention is defined in the claims. However, a non-exhaustive list of non-limiting examples is provided below. Any one or more of the features of these examples may be combined with any one or more features of other examples, embodiments or disclosures described herein.

Example 1. an aerosol-generating article having an upstream end and a downstream end, the aerosol-generating article defining a longitudinal direction between the upstream end and the downstream end;
an aerosol-forming substrate;
a tubular element disposed downstream of the aerosol-forming substrate and extending along the longitudinal axis, the tubular element comprising an air inlet;
a flavor substrate disposed downstream of the air inlet.

Example 2. The aerosol-generating article of Example 1, wherein the flavor substrate comprises a gel composition.

Example 3. the gel composition is configured to be fluid permeable when the temperature of the gel composition is equal to or greater than the permeability transition temperature of the gel composition; Example 2 The gel composition is configured to be substantially fluid-impermeable below the permeability transition temperature of the composition, preferably the permeability transition temperature of the gel composition is the phase transition temperature of the gel composition. Aerosol-generating articles described in .

Example 4. The aerosol-generating article of Example 3, wherein the gel composition has a permeability transition temperature of 70 degrees Celsius to 80 degrees Celsius.

Example 5. Examples 2 to 4, wherein the gel composition is configured to be fluid permeable at 85 degrees Celsius, and the gel composition is configured to be substantially fluid impermeable at 20 degrees Celsius. The aerosol generating article according to any one of the above.

Example 6. The aerosol-generating article according to any one of Examples 2 to 5, wherein the gel composition is thermoreversible.

Example 7. the withdrawal resistance of the aerosol-generating article when the gel composition is fluid-permeable is at least about 10 mm H ₂ O greater than the withdrawal resistance of the aerosol-generating article when the gel composition is substantially fluid-impermeable; The aerosol-generating article according to any one of Examples 2 to 6.

Example 8. the withdrawal resistance of the aerosol-generating article when the gel composition is fluid-permeable is at least about 20 mm _H2O greater than the withdrawal resistance of the aerosol-generating article when the gel composition is substantially fluid-impermeable; Aerosol generating article according to Example 7.

Example 9. the withdrawal resistance of the aerosol-generating article when the gel composition is fluid-permeable is at least about 30 mm _H2O greater than the withdrawal resistance of the aerosol-generating article when the gel composition is substantially fluid-impermeable; Aerosol generating article according to Example 8.

Example 10. the aerosol-generating article has a withdrawal resistance of greater than about 20 mm _H2O , preferably greater than about 30 mm _H2O , more preferably greater than about 40 mm _H2O , when the gel composition is substantially fluid-impermeable; An aerosol generating article according to any one of Examples 2 to 9, even more preferably greater than about 50 mm H ₂ O, and most preferably greater than about 60 mm H ₂ O.

Example 11. The withdrawal resistance of the aerosol generating article when the gel composition is fluid permeable is less than about 50 mm _H2O , more preferably less than about 40 mm _H2O , and even more preferably less than about 30 mm _H2O . an aerosol-generating article according to any one of Examples 2 to 10, wherein the aerosol-generating article is low, even more preferably less than about 20 mm H ₂ O, and most preferably less than about 10 mm H ₂ O.

Example 12. Aerosol generation according to any one of Examples 2 to 11, wherein the gel composition preferably comprises about 0.1% to about 4% nicotine, more preferably about 0.1% to 2% nicotine. Goods.

Example 13. The aerosol-generating article according to any one of Examples 2 to 12, wherein the gel composition includes a flavoring agent.

Example 14. The aerosol-generating article of Example 13, wherein the flavoring agent comprises one or more of coffee derivative flavoring agents containing menthol, caffeine, guana, taurine, and glucuronolactone.

Example 15. The aerosol-generating article according to any one of Examples 2 to 14, wherein the gel composition preferably comprises about 50% to about 75% glycerin, more preferably about 50% to about 65% glycerin.

Example 16. Preferably, the gel composition contains about 15% to about 35% hydroxyl, more preferably about 18% to about 32%, even more preferably about 20% to about 30%, and most preferably about 21% to about 27%. The aerosol-generating article according to any one of Examples 2 to 15, comprising polymethylcellulose (HPMC).

Example 17. The aerosol-generating article according to any one of Examples 2 to 16, wherein the gel composition preferably comprises about 3% to about 10% agar, more preferably about 4% to about 7% agar.

Example 18. Aerosol generation according to any one of Examples 2 to 17, wherein the gel composition preferably comprises from about 0.1% to about 12%, more preferably from about 0.1% to 7% fiber. Goods.

Example 19. Any one of Examples 2 to 18, wherein the gel composition preferably comprises about 0.1% to about 9%, more preferably about 0.1% to 7% low methoxyl (E440i) pectin. Aerosol-generating articles described in .

Example 20. Any one of Examples 2 to 19, wherein the gel composition preferably comprises from about 1.7% to about 3.1%, more preferably from about 2.1% to about 2.9% lactic acid. Aerosol-generating articles described in .

Example 21. Aerosol according to any one of Examples 2 to 20, wherein the gel composition preferably comprises from about 0.1% to about 7%, more preferably from about 0.1% to about 3% calactate. Generated items.

Example 22. The aerosol-generating article of any one of Examples 2-21, wherein the gel composition comprises a cannabinoid compound.

Example 23. The aerosol-generating article of any one of Examples 2-22, wherein the gel composition is uniformly distributed within the flavor substrate.

Example 24. The aerosol-generating article according to any one of Examples 2 to 22, wherein the gel composition is distributed in a variable manner in the flavor substrate.

Example 25. The gel composition is capable of producing about 1,000,000 to about 1 Pascal per second, preferably 100,000 to 10 Pascals per second, preferably 10,000 to 1,000 Pascals per second, preferably 1,000 to 100 Pascals per second, preferably an aerosol-generating article according to any one of Examples 2 to 24, wherein the aerosol-generating article has a viscosity of 500 to 200 Pascals per second.

Example 26. The aerosol-generating article of Example 1, wherein the flavor substrate comprises a flavor material.

Example 27. The flavoring material is configured to be fluid permeable when the temperature of the flavoring material is equal to or greater than the permeability transition temperature of the flavoring material; 27. The aerosol-generating article of Example 26, configured to be substantially fluid-impermeable below the transition temperature, preferably the permeability transition temperature of the flavoring material is the phase transition temperature of the flavoring material.

Example 28. The aerosol-generating article of Example 27, wherein the flavor material has a permeability transition temperature of 70 degrees Celsius to 80 degrees Celsius.

Example 29. Any of Examples 26 to 28, wherein the flavoring material is configured to be fluid permeable at 85 degrees Celsius, and the flavoring material is configured to be substantially fluid impermeable at 20 degrees Celsius. The aerosol-generating article according to any one of the above.

Example 30. The aerosol-generating article according to any one of Examples 26 to 29, wherein the flavor material is thermoreversible.

Example 31. Example 26, wherein the withdrawal resistance of the aerosol-generating article when the flavor material is fluid-permeable is at least about 10 mm _H2O greater than the withdrawal resistance of the aerosol-generating article when the flavor is substantially fluid-impermeable. - The aerosol-generating article according to any one of Example 30.

Example 32. An embodiment in which the withdrawal resistance of the aerosol-generating article when the flavoring material is fluid-permeable is at least about 20 mm _H2O greater than the withdrawal resistance of the aerosol-generating article when the flavoring material is substantially fluid-impermeable. 32. The aerosol-generating article according to 31.

Example 33. Examples, wherein the withdrawal resistance of the aerosol-generating article when the flavoring material is fluid permeable is at least about 30 mm H ₂ O greater than the withdrawal resistance of the aerosol-generating article when the flavoring material is substantially fluid-impermeable. 33. The aerosol generating article according to 32.

Example 34. The withdrawal resistance of the aerosol-generating article when the flavoring material is substantially fluid-impermeable is greater than about 20 mm _H2O , more preferably greater than about 30 mm _H2O , and even more preferably greater than about 40 mm _H2O . , even more preferably greater than about 50 mm H ₂ O, and most preferably greater than about 60 mm H ₂ O.

Example 35. The withdrawal resistance of the aerosol-generating article when the flavoring material is fluid permeable is less than about 50 mm _H2O , more preferably less than about 40 mm _H2O , and even more preferably less than about ₃₀ mm H2O. The aerosol-generating article of any one of Examples 26-34, having a low, even more preferably less than about 20 mm H ₂ O, most preferably less than about 10 mm H ₂ O.

Example 36. The aerosol-generating article according to any one of Examples 26 to 35, wherein the flavoring material preferably comprises about 0.1% to about 4% nicotine, more preferably about 0.1% to 2% nicotine. .

Example 37. The aerosol-generating article according to any one of Examples 26 to 36, wherein the flavor material comprises a flavoring agent.

Example 38. The aerosol-generating article of Example 37, wherein the flavoring agent comprises one or more of a coffee derivative flavoring agent containing menthol, caffeine, guana, taurine, and glucuronolactone.

Example 39. The aerosol-generating article according to any one of Examples 26 to 38, wherein the flavoring material preferably comprises about 50% to about 75% glycerin, more preferably about 50% to about 65% glycerin.

Example 40. Preferably the flavoring material is from about 15% to about 35%, more preferably from about 18% to about 32%, even more preferably from about 20% to about 30%, most preferably from about 21% to about 27%. The aerosol-generating article of any one of Examples 26-39, comprising methylcellulose (HPMC).

Example 41. The aerosol-generating article according to any one of Examples 26 to 40, wherein the flavoring material preferably comprises about 3% to about 10% agar, more preferably about 4% to about 7% agar.

Example 42. The aerosol-generating article according to any one of Examples 26 to 41, wherein the flavoring material preferably comprises from about 0.1% to about 12%, more preferably from about 0.1% to 7% fiber. .

Example 43. In any one of Examples 26 to 42, the flavoring material preferably comprises from about 0.1% to about 9%, more preferably from about 0.1% to 7% low methoxyl (E440i) pectin. Aerosol-generating articles as described.

Example 44. In any one of Examples 26 to 43, the flavoring material preferably comprises from about 1.7% to about 3.1%, more preferably from about 2.1% to about 2.9% lactic acid. Aerosol-generating articles as described.

Example 45. Aerosol generation according to any one of Examples 26 to 44, wherein the flavoring material preferably comprises from about 0.1% to about 7%, more preferably from about 0.1% to about 3% calactate. Goods.

Example 46. The aerosol-generating article according to any one of Examples 26 to 45, wherein the flavor material comprises a cannabinoid compound.

Example 47. Examples 26 to 26, wherein the flavoring material comprises hydroxypropylmethylcellulose, carboxymethylcellulose, cellulosic enhancer, or any combination thereof, preferably in an amount containing in the weight percentages disclosed hereinabove. 47. The aerosol generating article according to any one of 46.

Example 48. The flavoring material comprises a cellulosic reinforcement, the cellulosic reinforcement comprising cellulose fibers, microcrystalline cellulose, cellulose powder or any combination, preferably in an amount containing in the weight percentages disclosed herein above. The aerosol-generating article according to any one of Examples 26 to 47.

Example 49. Examples 1 to 2, wherein the resistance to deformation strength of the flavor substrate can be from about 0.5 kgf to about 3 kgf, preferably from about 1.3 kgf to about 2.7 kgf, more preferably from about 1.9 kgf to about 2.5 kgf. The aerosol-generating article according to any one of Example 48.

Example 50. The aerosol-generating article according to any one of Examples 1 to 49, wherein the flavor substrate comprises an outer layer.

Example 51. The aerosol-generating article of Example 50, wherein the outer layer is made of the same material as the remainder of the flavor substrate.

Example 52. Any of Examples 1 to 51, wherein the distance between the upstream end of the aerosol-forming substrate and the downstream end of the flavor substrate is less than about 40 mm, preferably less than about 30 mm, even more preferably less than 20 mm. The aerosol-generating article according to any one of the above.

Example 53. Any of Examples 1 to 52, further comprising an adjustment member disposed on the tubular element and movable relative to the tubular element such that the adjustment member is configured to vary the size of the air inlet. The aerosol-generating article according to item 1.

Example 54. 54. The aerosol-generating article of Example 53, wherein the adjustment member and the tubular element are linearly movable with respect to each other.

Example 55. 54. The aerosol-generating article of Example 53, wherein the adjustment member and the tubular element are configured to rotate relative to each other.

Example 56. 54. The aerosol-generating article of Example 53, wherein the adjustment member and the tubular element are configured to rotate and move linearly relative to each other, eg, by threads.

Example 57. The tubular element includes an inner tube and an outer tube, the outer tube is disposed about the inner tube, an outer airflow channel is longitudinally separated by the inner tube and the outer tube, and the inner airflow channel is defined by the inner tube. 57. The aerosol-generating article of any one of Examples 1 to 56, wherein the aerosol-generating article is longitudinally partitioned and at least the inner airflow channel is adapted to flow the substrate aerosol toward the downstream end.

Example 58. The aerosol-generating article of Example 57, wherein the flavor substrate is disposed within the outer airflow channel.

Example 59. further comprising at least one permeability control element;
The at least one permeability control element is configured to be fluid permeable when the temperature of the at least one permeability control element is equal to or greater than the permeability transition temperature of the at least one permeability control element. and preferably the permeability transition temperature of the at least one permeability control element is the phase transition temperature of the at least one permeability control element;
the at least one permeability control element is configured to be substantially fluid impermeable when the temperature of the at least one permeability control element is below the permeability transition temperature of the at least one permeability control element; ,
at least one permeability control element is disposed within the outer airflow channel, and the at least one permeability control element is configured to operate when the temperature of the at least one permeability control element is below the permeability transition temperature of the at least one permeability control element. , prevents fluid from flowing along the outer airflow channel downstream of the permeability control element, and the temperature of the at least one permeability control element is equal to the permeability transition temperature of the at least one permeability control element, or 59. The aerosol-generating article of Example 57 or Example 58, wherein the aerosol-generating article is configured to allow fluid to flow along the outer airflow channel downstream of the permeability control element.

Example 60. further comprising at least one permeability control element;
at least one permeability control element is configured to be fluid permeable when a temperature of the at least one permeability control element is 85 degrees Celsius;
at least one permeability control element is configured to be substantially fluid impervious when the temperature of the at least one permeability control element is 20 degrees Celsius;
at least one permeability control element is disposed within the outer airflow channel, and when the temperature of the at least one permeability control element is 20 degrees Celsius, fluid flows along the outer airflow channel downstream of the permeability control element. an embodiment configured to prevent fluid from flowing along the outer airflow channel downstream of the permeability control element when the temperature of the at least one permeability control element is 85 degrees Celsius. The aerosol generating article according to any one of Examples 57 to 59.

Example 61. The aerosol-generating article of Example 59 or Example 60, wherein the at least one permeability control element comprises a gel composition.

Example 62. The aerosol-generating article of any one of Examples 59-61, wherein the at least one permeability control element comprises a thermoreversible material, such as a thermoreversible gel composition.

Example 63. The aerosol-generating article of Example 58, and any one of Examples 59-62, wherein the flavor substrate is a permeability control element.

Example 64. The aerosol-generating article of any one of Examples 59-63, wherein the permeability control element is disposed downstream of the flavor substrate.

Example 65. The aerosol-generating article of any one of Examples 59-64, further comprising a spanning element disposed within the outer airflow channel upstream of the flavor substrate.

Example 66. The aerosol-generating article of Example 65, wherein the spanning element is a permeability control element.

Example 67. The aerosol-generating article of Example 63, wherein the flavor substrate extends longitudinally along the entire airflow channel.

Example 68. 67. The aerosol-generating article of Example 65 or Example 66, wherein the outer airflow channel comprises an air inlet, the air inlet being located downstream of the spanning element.

Example 69. 69. The aerosol-generating article of any one of Examples 1-68, wherein the tubular element is longitudinally disposed immediately downstream of the aerosol-forming substrate.

Example 70. The aerosol-generating article of any one of Examples 1 to 69, further comprising a filter disposed downstream of the tubular element.

Example 71. 71. The aerosol-generating article of Example 70, wherein the filter is longitudinally disposed immediately downstream of the tubular element.

Example 72. 71. The aerosol-generating article of any one of Examples 1 to 70, further comprising an aerosol cooling element disposed longitudinally downstream of the tubular element.

Example 73. The aerosol generating article of Example 72 when dependent on Example 70, wherein the aerosol cooling element is disposed between the tubular element and the filter.

Example 74. The aerosol-generating article of any one of Examples 1 to 73, further comprising a wrapper surrounding at least a portion of the aerosol-generating article.

Example 75. 75. The aerosol-generating article of any one of Examples 1-74, further comprising a connecting mechanism configured to hold two or more components of the aerosol-generating article together.

Example 76. The aerosol-generating article according to any one of Examples 1 to 75, wherein the aerosol-forming substrate includes a liquid component.

Example 77. The aerosol-generating article according to any one of Examples 1 to 76, wherein the aerosol-forming substrate comprises a solid component.

Example 78. An aerosol-generating article according to any one of Examples 1 to 77, wherein the aerosol-forming substrate comprises a plant-based material, preferably a homogenized plant-derived material.

Example 79. The aerosol-generating article of any one of Examples 1-78, wherein the aerosol-forming substrate comprises a non-tobacco material.

Example 80. The aerosol-generating article of Example 78 or Example 79, wherein the aerosol-forming substrate comprises a tobacco material.

Example 81. The aerosol-generating article of Example 80, wherein the aerosol-forming substrate comprises solid homogenized tobacco material.

Example 82. 82. The aerosol-generating article of Example 81, wherein the aerosol-forming substrate comprises a collection of at least one sheet of solid homogenized tobacco material.

Example 83. 83. The aerosol-generating article of Example 82, wherein the at least one collection of sheets comprises a textured sheet, a crimped sheet, or both.

Example 84. The aerosol-generating article of any one of Examples 81-83, wherein the solid homogenized tobacco material comprises strips of tobacco material.

Example 85. The aerosol-generating article according to any one of Examples 77 to 84 when dependent on Example 77, wherein the aerosol-forming substrate has a rod comprising a plurality of elongated tubular elements.

Example 86. The aerosol-generating article of Example 85 as dependent on Example 81, wherein the plurality of elongated tubular elements comprises solid homogenized tobacco material.

Example 87. 87. The aerosol-generating article of Example 86, wherein the at least one elongated tubular material comprises a rolled strip cut from a sheet or web of solid homogenized tobacco material.

Example 88. The aerosol-generating article of any one of Examples 1 to 87, wherein the aerosol-forming substrate is a hollow tubular substrate defining an internal cavity.

Example 89. The aerosol-generating article according to any one of Examples 1 to 88, further comprising a layer of thermally conductive material.

Example 90. The aerosol-generating article according to any one of Examples 1 to 89, wherein the aerosol-forming substrate comprises an aerosol former.

Example 91. An aerosol generation device including a heater, wherein the heater includes a base heating element configured to heat an aerosol generating article, and a downstream heating element disposed downstream of the base heating element.

Example 92. 92. The aerosol generation device of Example 91, wherein the heater includes at least one resistive heating element.

Example 93. 93. The aerosol generation device of Example 92, wherein the at least one resistive heating element comprises an electrically insulated substrate and one or more conductive tracks on the electrically insulated substrate.

Example 94. 94. The aerosol generation device according to any one of Examples 91 to 93, wherein the heater comprises at least one induction heating device, each induction device including at least one inductor coil and at least one susceptor.

Example 95. 95. The aerosol generation device of Example 94, wherein the at least one inductor coil is arranged to generate a varying magnetic field when receiving a varying current from the power source, the varying current being from about 5 kHz to about 500 kHz.

Example 96. 95. The aerosol generation device of Example 94, wherein the at least one inductor coil is arranged to generate a varying magnetic field when receiving a varying current from the power source, the varying current being from about 500 kilohertz to about 5 megahertz.

Example 97. The aerosol generation device according to any one of Examples 94 to 96, wherein the at least one inductor coil is a flat inductor coil, such as a flat inductor coil wound helically in a substantially planar plane.

Example 98. The aerosol generation device of any one of Examples 94-96, wherein the at least one inductor coil is a tubular inductor coil, such as a tubular inductor coil spirally wound about a longitudinal axis.

Example 99. 99. The aerosol generating device according to any one of Examples 94-98, wherein the at least one inductor coil is formed from an electrically conductive material.

Example 100. The aerosol generation device according to any one of Examples 94 to 99, wherein the at least one susceptor is formed from an electrically conductive material.

Example 101. The aerosol generation device according to any one of Examples 94 to 100, wherein the at least one susceptor comprises a susceptor layer provided on a support, and the support preferably includes a heat insulating material.

Example 102. The aerosol generation device according to any one of Examples 92 to 101, wherein the heater comprises at least one resistive heating element and at least one inductive heating element.

Example 103. The aerosol generation device according to any one of Examples 91 to 102, wherein the base heating element is a base induction heating device and includes a base inductor coil and a base susceptor.

Example 104. The aerosol generation device of Example 103, wherein the downstream heating element is a downstream induction heating device and includes a downstream inductor coil and a downstream susceptor.

Example 105. The aerosol generation device according to Example 103, wherein the downstream heating element is a resistance heating element.

Example 106. The aerosol generation device according to any one of Examples 91 to 102, wherein the base heating element is a resistance heating element.

Example 107. The aerosol generation device according to Example 106, wherein the downstream heating element is a resistive heating element.

Example 108. 107. The aerosol generation device of Example 106, wherein the downstream heating element is a downstream induction heating device and includes a downstream inductor coil and a downstream susceptor.

Example 109. The aerosol generation device according to any one of Examples 91 to 102, wherein the downstream heating element is a downstream induction heating device and includes a downstream inductor coil and a downstream susceptor.

Example 110. The aerosol generation device according to Example 109, wherein the base heating element is a base induction heating device and includes a base inductor coil and a base susceptor.

Example 111. The aerosol generating device according to Example 109, wherein the base heating element is a resistance heating element.

Example 112. The aerosol generation device according to any one of Examples 91 to 102, wherein the downstream heating element is a resistance heating element.

Example 113. The aerosol generation device of Example 112, wherein the base heating element is a base induction heating device and includes a base inductor coil and a base susceptor.

Example 114. The aerosol generating device according to Example 112, wherein the base heating element is a resistance heating element.

Example 115. The aerosol generation device according to any one of Examples 91 to 114, wherein the heater includes an internal heating element.

Example 116. The aerosol generation device according to any one of Examples 91 to 115, wherein the heater includes an external heating element.

Example 117. The aerosol generation device according to any one of Example 115 or Example 116, wherein the downstream heating element and the base heating element are internal heating elements.

Example 118. The aerosol generation device according to Example 115 or Example 116, wherein the downstream heating element and the base heating element are outer heating elements.

Example 119. The aerosol generation device of Example 115 or Example 116, wherein the downstream heating element is an internal heating element and the base heating element is an external heating element.

Example 120. The aerosol generation device of Example 115 or Example 116, wherein the downstream heating element is an external heating element and the base heating element is an internal heating element.

Example 121. The aerosol generation device according to any one of Examples 91 to 120, further comprising a power source.

Example 122. The aerosol generation device of Example 121, wherein the power source is electrically connected to the heater.

Example 123. The aerosol generating device according to any one of Examples 91 to 122, further comprising a cavity for receiving an aerosol generating article.

Example 124. The aerosol generation device according to any one of Examples 91 to 123, further comprising a device housing.

Example 125. The aerosol generating device of Example 123 and Example 124, wherein the device housing at least partially defines a cavity for receiving an aerosol generating article.

Example 126. The aerosol generation device according to any one of Examples 91 to 125, further comprising at least one device air inlet.

Example 127. 126. The aerosol generation device according to example 126 when dependent on example 124, wherein the device housing comprises at least one device air inlet.

Example 128. 128. The aerosol generation device of Example 126 or Example 127, wherein the at least one device air inlet comprises a base device air inlet.

Example 129. The aerosol generation device of any one of Examples 126-128, wherein the at least one device air inlet includes a downstream device air inlet.

Example 130. The aerosol-generating article according to any one of Examples 91 to 129, further comprising a controller.

Example 131. 131. The aerosol-generating article of any one of Examples 91-130, further comprising a sensor configured to detect airflow indicative of a user smoking.

Example 132. The aerosol-generating article of any one of Examples 91-131, further comprising at least one electrical connector.

Example 133. 133. The aerosol-generating article of Example 132, wherein the at least one electrical connector comprises an outer plug or socket, such as a USB plug or socket.

Example 134. An aerosol generation system comprising the aerosol generation article according to any one of Examples 1 to 90 and the aerosol generation device according to any one of Examples 91 to 133.

These and other features and advantages of the invention will become more apparent in the light of the following detailed description of preferred embodiments, given by way of illustrative and non-limiting example only, with reference to the accompanying figures. It will be.

FIG. 1 depicts a longitudinal cross-sectional view of an aerosol-generating article 10 having an upstream end 13 and a downstream end 14, with the aerosol-generating article 10 defining a longitudinal axis between the upstream end 13 and the downstream end 14. Article 10 includes an aerosol-forming substrate 11 . In the embodiment of FIG. 1, tubular element 12 is positioned immediately downstream of aerosol-forming substrate 11. In the embodiment of FIG. Tubular element 12 defines a longitudinally extending opening adapted to allow the substrate aerosol to flow toward downstream end 14 . Tubular element 12 includes an air inlet 15 through which outside air can be drawn into the opening of tubular element 12 . Tubular element 12 defines at least one airflow channel that establishes uninterrupted fluid communication between an upstream end 13 of tubular element 12 and a downstream end 14 of tubular element 12.

In the embodiment of FIG. 1, flavor substrate 16 is longitudinally disposed immediately downstream of tubular element 12. In the embodiment of FIG. In this embodiment, flavor substrate 16 includes a gel composition. However, other flavoring materials different from the gel composition may be used in addition to or in place of the gel composition.

Providing the flavor substrate 16 downstream of the air inlet 15 contained in the tubular element 12 allows control of the amount of airflow supplied to the flavor substrate 16. The gel composition serves to generate a uniform substrate upon heating of the flavor substrate 16, which provides a highly consistent substrate aerosol that can be entrained in the substrate aerosol that may be generated by the aerosol-forming substrate 11 positioned upstream of the flavor substrate 16. A flavored aerosol can be produced.

In the embodiment of FIGS. 1-8, filter 17 is longitudinally disposed immediately downstream of tubular element 12 and mouthpiece 22 is disposed immediately downstream of filter 17. In the embodiment of FIGS.

The gel composition of the flavor substrate 16 in the embodiment of FIG. The gel composition may be configured to be fluid permeable and become substantially fluid impermeable when the temperature of the gel composition is below the permeability transition temperature of the gel composition, as shown by the dashed line in FIG. . Accordingly, changes in the temperature of the flavor substrate may result in changes in some properties of the aerosol-generating article 10. Heating the flavor substrate 16 to the permeability transition temperature of the gel composition increases the flow of air that can flow toward the downstream end 14 of the aerosol-generating article 10 because the air flow can pass through the permeable flavor substrate 16. This can lead to increased volume and decreased withdrawal resistance of the aerosol-generating article 10. The increase depends on the percentage of the cross-sectional area occupied by the flavor substrate 16 relative to the maximum cross-sectional area of the one or more airflow channels within the aerosol-generating article 10 at such cross-section. The flavor material is fluid permeable such that fluid flowing along the airflow channel flows downstream of the flavor substrate 16 when the temperature of the flavor material is equal to or greater than the permeability transition temperature of the flavor material. is substantially fluid-impermeable to allow fluid flowing along the airflow channel to flow downstream of the flavor substrate 16 when the temperature of the flavor material is below the permeability transition temperature of the flavor material. Optionally configured to substantially prevent flow, the flavoring material is a gel composition.

In Figures 1-10, permeability control elements (such as permeability control elements, flavor substrates, or spanning elements) marked with a dashed line indicate that the permeability control element is substantially fluid impermeable; A permeability control element marked with indicates that the permeability control element is fluid permeable.

The gel composition of the embodiment of FIG. 1 may also be configured to be fluid-impermeable at any operating temperature at which it is applied to flavor substrate 16 by an aerosol generator. In this embodiment, the flavor substrate 16 typically does not extend across the entire cross-section of the one or more airflow channels to allow the airflow to flow toward the downstream end 14. Alternatively, the flavor substrate 16 may block the airflow channels. Flavor substrate 16 may extend across the cross-section of one or more of the plurality of airflow channels to block airflow toward downstream end 14. In this manner, flavor substrate 16 may extend over approximately 100 percent of the cross-section of the airflow channel. Flavor substrate 16 may extend over at least about 25 percent of the cross-section of the airflow channel. Flavor substrate 16 may extend over at least about 50 percent of the cross-section of the airflow channel. Flavor substrate 16 may extend over at least about 75 percent of the cross-section of the airflow channel.

The flavor material gel composition of flavor substrate 16 comprises glycerin present at 50-75 weight percent, preferably 50-65 weight percent, hydroxypolymethylcellulose (15-35 weight percent, preferably 20-30 weight percent) HPMC), 3 to 10 weight percent, preferably 4 to 7 weight percent agar, 0 to 12 weight percent, preferably 0 to 7 weight percent fiber, 0 to 9 weight percent, preferably 0 to 7 weight percent percent low methoxyl (LM) (E440i) pectin, 1.7 to 3.1 percent by weight, preferably 2.1 to 2.9 percent by weight lactic acid, 0 to 7 percent by weight, preferably 0 to 3 percent by weight The composition may have an amount of Ca-lactic acid, 0 to 4 weight percent, preferably 0 to 2 weight percent nicotine, nicotine and flavoring agent, or flavoring agent.

The flavoring agent can be one or more of menthol extract, vanilla extract, and coffee derivative flavoring agent. Coffee derivative flavoring agents contain one or more of caffeine, guarana, taurine, and glucuronolactone. When flavoring agents are present in the gel composition, they are preferably present at 0.2 to 4 weight percent, more preferably 0.4 to 2 weight percent.

Examples of compositions of gel compositions that may be used in any of the permeability control elements, flavor substrates, or spanning elements described herein are shown in Table 1 below. Table 1 shows the weight percent of each component of the gel composition.
[Table 1]

The gel compositions described above can provide a predictable composition form upon storage or during transportation from manufacture to the consumer. The gel composition may substantially maintain its shape. The gel composition remains at room temperature (approximately 21 degrees Celsius). The gel composition is configured to be in the solid state within a temperature range that covers standard use environmental temperatures for use of the aerosol generating article. A suitable range of environmental temperature may be from about -20 degrees Celsius to about 70 degrees Celsius. The overall state of the gel composition may be primarily solid, or it may be a gel solid state and fluid impermeable. Above about 70 degrees Celsius, the overall state of the composition may be primarily liquid and fluid permeable.

When in the solid state, the gel composition described above exhibits sufficient resistance to deformation to provide the flavor substrate with mechanical stability for handling during manufacture, transportation, and use of the aerosol-generating article. may be configured to have. The gel composition may have a resistance to deformation strength of 0.5 kgf to 3.0 kgf. The resistance to deformation is preferably 1.3 kgf to 2.7 kgf, more preferably 1.9 kgf to 2.5 kgf. The mechanical strength of the gel composition can be adjusted to a desired range by adjusting the amount of low methoxyl (LM) pectin in the composition. The use of LM pectin for this purpose depends on the particular composition formulation, and is in proportions of 0.1 to 9 weight percent, preferably 0.1 to 7 weight percent, most preferably 1 to 3 weight percent. It can be used in

The composition of the gel composition may be distributed in a variable manner within the flavor matrix. In alternative embodiments, the composition may have a homogeneous distribution. The flavored substrate may include an outer layer that is useful in giving the flavored substrate the necessary shape for placement within the aerosol-generating article. The outer layer may be a shell. The remaining portion of the flavor substrate may be the core. A flavor substrate including a core and an outer layer is produced by first depositing a core containing the remainder of the flavor substrate and then depositing layers on the core to form the outer layer. There are several types of manufacturing processes that can be applied. The core layer and outer layer may be manufactured by extrusion. A tubular core may be produced and the next step may be an extrusion process in which the gel composition is deposited uniformly on the outer surface of the tubular core. The outer layer can be made of the same gel composition as the rest of the flavor substrate. The core layer and outer layer may have the same properties. The core layer and outer layer may have different properties. In one example, the core is about 5 to about 20 percent softer, and more preferably about 10 to about 15 percent softer and has a lower mechanical strength than the harder outer layer, the shell. Alternatively, or additionally, if the gel composition includes a flavoring agent, the outer layer (shell) may be flavorless.

In the embodiment shown in FIGS. 1 and 2, the flavor material of the flavor substrate 16 includes flavored composition A or flavored composition B described above in Table 1.

FIG. 2 is a longitudinal cross-sectional view of the aerosol-generating article of FIG. 1 showing the moment the flavor substrate 16 is at a temperature at which the gel composition is fluid permeable, as represented by the dots in the figure. Similarly, aerosol-forming substrate 11 is heated to generate a substrate aerosol that is entrained into the ambient air entering aerosol-generating article 10 on upstream end 13 thereof.

In FIG. 2, outside air is drawn into the tubular element 12 through the air inlet 15. In FIG. The flow of outside air and substrate aerosol reaches the flavor substrate 16 . Flavored substrate 16 is fluid permeable and is further heated to form a flavored aerosol. The flavored aerosol is entrained in the flow of ambient air and substrate aerosol to form an aerosol that is inhalable by the user. The entrained aerosol is filtered by filter 17 and delivered to the user through mouthpiece 22.

FIG. 3 shows a longitudinal cross-sectional view of an aerosol-generating article 10 different from that of FIG. 1, in which the tubular element 12 includes an outer airflow channel 18 and an inner airflow channel 19. In the embodiment of FIG. 3, flavor substrate 16 is longitudinally disposed immediately downstream of tubular element 12. In the embodiment of FIG.

In the embodiment of FIG. 3, permeability control element 20 is positioned within outer airflow channel 18. The permeability control element 20 is configured such that the temperature of the permeability control element 20 is equal to or greater than the permeability transition temperature of the permeability control element 20, e.g., when the temperature of the permeability control element 20 is 85 degrees Celsius. , configured to be fluid permeable. Similarly, the permeability control element 20 may be substantially irradiated when the temperature of the permeability control element is below the permeability transition temperature of the permeability control element, such as when the temperature of the permeability control element is 20 degrees Celsius. is configured to be fluid-impermeable. Accordingly, the permeability control element 20 allows fluid to flow along the outer airflow channel 18 downstream of the permeability control element 20 when its temperature is below its permeability transition temperature (as depicted in FIG. 3). The fluid enters the outer airflow channel 18 downstream of the permeability control element 20 when its temperature is equal to or greater than its permeability transition temperature (as depicted in FIG. 4). may be allowed to flow along. This may result in changes in some properties of the aerosol generating article 10. Heating the permeability control element 20 to its permeability transition temperature allows airflow to flow along the outer airflow channel 18, thereby increasing the airflow that can flow toward the downstream end 14 of the aerosol-generating article 10. and may lead to a decrease in the withdrawal resistance of the aerosol-generating article 10. Similarly, permeability control element 20 may be advantageously used to adjust the amount of airflow to which flavor substrate 16 is provided.

In the embodiment of FIG. 3, a spanning element 21 is provided within the outer airflow channel 18 to impede or modulate the flow of substrate aerosol into the outer airflow channel 18. The spanning element 21 may be a permeability control element. If the spanning element 21 is a permeability control element, e.g. , the substrate aerosol may flow into the outer airflow channel 18 . Similarly, substrate aerosol is prevented from flowing into the outer airflow channel 18 upon heating of the aerosol-forming substrate 11 if the temperature of the spanning element 21 is lower than the permeability transition temperature of the spanning element 21, for example at 20 degrees Celsius. can be done.

In this embodiment, permeability control element 20 and spanning element 21 include a gel composition. However, in alternative embodiments, permeability control element 20 and spanning element 21 include other suitable materials to achieve the desired change in permeability as a function of temperature of the material.

In the embodiment shown in FIGS. 3 and 4, the permeability control element 20 and the spanning element 21 include unflavored composition A or flavored composition B described above in Table 1.

In the embodiment of FIG. 3, filter 17 is longitudinally positioned immediately downstream of tubular element 12 and mouthpiece 22 is positioned immediately downstream of filter 17. In the embodiment of FIG.

The gel composition of the flavor substrate 16 in the embodiment of FIG. , may be configured to be fluid permeable, and substantially fluid impermeable when the temperature of the gel composition is below the permeability transition temperature of the gel composition, as shown by the dashed line in FIG. be. Thus, flavor substrate 16 may also be a permeability control element. The gel composition of the embodiment of FIG. 3 may, in other embodiments, be configured to be substantially fluid-impermeable at any operating temperature at which it is applied to a flavor substrate by an aerosol generating device. In the latter embodiment, the flavor substrate typically does not extend across the entire cross-section of the one or more airflow channels to allow the airflow to flow toward the downstream downstream end of the aerosol-generating article.

In the embodiment shown in FIGS. 3 and 4, the flavor material of flavor substrate 16 includes flavored composition A or flavored composition B described above in Table 1.

FIG. 4 is a longitudinal cross-sectional view of the aerosol-generating article of FIG. 1, and the temperature at which the permeability control element 20, the spanning element 21, and the flavor substrate 16 each become fluid permeable, as represented by the dots in the figure. Shows a moment in time. Similarly, aerosol-forming substrate 11 is heated to generate a substrate aerosol that is entrained into the ambient air entering aerosol-generating article 10 on upstream end 13 thereof. A significant proportion of the substrate aerosol flows along the inner airflow channel 19 of the tubular element 12. In FIG. 4, spanning element 21 is fluid permeable so that a portion of the substrate aerosol flows along outer airflow channel 18. In FIG. In embodiments where the spanning element is permanently fluid-impermeable at any operating temperature of the aerosol-generating article, all substrate aerosol generated upon heating of the aerosol-forming substrate flows along the inner airflow channel.

In FIG. 4, outside air is drawn into the outer airflow channel 18 through the air inlet 15. In FIG. At the moment shown in FIG. 4, the permeability control element 20 is fluid permeable so that the flow of ambient air and substrate aerosol reaches the flavor substrate 16. The flavor substrate 16 is also fluid permeable and is further heated to form a flavor aerosol. The flavored aerosol is entrained in the flow of ambient air and substrate aerosol to form an aerosol that is inhalable by the user. The entrained aerosol is filtered by filter 17 and delivered to the user through mouthpiece 22.

FIG. 5 shows an aerosol-generating article in which, unlike the aerosol-generating article of FIG. A longitudinal cross-sectional view of article 10 is shown.

In this embodiment, flavor substrate 16 is a permeability control element. Thus, as shown in FIG. 5, the flavor substrate 16 prevents airflow from flowing along the outer airflow channel 18 downstream of the flavor substrate 16 when its temperature is below the permeability transition temperature of the gel composition. Similarly, the permeability control element 20 is configured such that when its temperature is below the permeability transition temperature of the permeability control element 20, the airflow is directed to the outer airflow downstream of the permeability control element 20, as also represented in FIG. Flow along channel 18 is prevented. The flavor substrate 16 is configured such that airflow flows along an outer airflow channel 18 downstream of the flavor substrate 16 when its temperature is equal to or greater than the permeability transition temperature of the gel composition, as shown in FIG. make it possible. As also shown in FIG. Allowing airflow to flow along channel 18.

Spanning element 21 is arranged within outer airflow channel 18 upstream of air inlet 15 . The spanning element 21 may be a permeability control element. If the spanning element 21 is a permeability control element, the substrate aerosol will be absorbed by the outer air stream upon heating of the aerosol-forming substrate 11 if the temperature of the spanning element 21 is equal to or higher than the permeability transition temperature of the spanning element 21. may flow into channel 18 .

FIG. 6 is a longitudinal cross-sectional view of the aerosol-generating article of FIG. 5, at which the permeability control element 20, the spanning element 21, and the flavor substrate 16 each become fluid permeable, as indicated by the dots in the figure. Shows a moment in time. Similarly, aerosol-forming substrate 11 is heated to generate a substrate aerosol that is entrained into the ambient air entering aerosol-generating article 10 on upstream end 13 thereof. A significant proportion of the substrate aerosol flows along the inner airflow channel 19 of the tubular element 12. In FIG. 6, spanning element 21 is fluid permeable so that a portion of the substrate aerosol flows along outer airflow channel 18. In FIG. In embodiments where the spanning element is permanently fluid-impermeable, all substrate aerosol generated upon heating of the aerosol-forming substrate 11 flows along the inner airflow channel.

In FIG. 6, outside air is drawn into the outer airflow channel 18 through the air inlet 15. In FIG. The flavor substrate 16 is also fluid permeable and is further heated to form a flavor aerosol within the outer airflow channel 18. The flavor aerosol is entrained in the outside air flow and a portion of the substrate aerosol within the outer airflow channel 18 . The permeability control element 20 arranged downstream of the flavor substrate 16 is fluid permeable at the moment shown in FIG. 6, so that the resulting aerosol reaches the filter 17. The aerosol is then entrained by a portion of the substrate aerosol flowing along the inner airflow channel 19 to form an aerosol that is inhalable by the user. Aerosol is delivered to the user through mouthpiece 22.

In the embodiment shown in FIGS. 5 and 6, permeability control element 20 and spanning element 21 each include unflavored composition A or unflavored composition B, as described above in Table 1.

In the embodiment shown in FIGS. 5 and 6, the flavor material of the flavor substrate 16 includes flavored composition A or flavored composition B described above in Table 1.

FIG. 7 shows an aerosol-generating article in which, unlike the aerosol-generating article of FIG. A longitudinal cross-sectional view of the generated article 10 is shown. Thus, as shown in FIG. 7, the flavor substrate 16 prevents airflow from flowing along the outer airflow channel 18 downstream of the tubular element 12 when its temperature is below the permeability transition temperature of the gel composition. Similarly, the flavor substrate 16 is arranged so that the air flow along the outer air flow channel 18 downstream of the tubular element 12 when its temperature is equal to or greater than the permeability transition temperature of the gel composition, as shown in FIG. and flow.

FIG. 8 is a longitudinal cross-sectional view of the aerosol-generating article of FIG. 7, showing the instant at which the spanning element 21 and the flavor substrate 16 are each at a fluid permeable temperature, as represented by the dots in the figure. Similarly, aerosol-forming substrate 11 is heated to generate a substrate aerosol that is entrained into the ambient air entering aerosol-generating article 10 on upstream end 13 thereof. A significant proportion of the substrate aerosol flows along the inner airflow channel 19 of the tubular element 12. In FIG. 8, spanning element 21 is fluid permeable so that a portion of the substrate aerosol also flows along outer airflow channel 18. In embodiments where the spanning element is permanently fluid-impermeable, all substrate aerosol generated upon heating of the aerosol-forming substrate flows along the inner airflow channel.

In FIG. 8, outside air is drawn into the outer airflow channel 18 through the air inlet 15. In FIG. The flavor substrate 16 is fluid permeable at the moment of FIG. 8 and is further heated to form a flavor aerosol within the outer airflow channel 18. Thus, the flavor aerosol is entrained in the outside air flow and a portion of the substrate aerosol in the outer airflow channel 18. The resulting aerosol is entrained by a portion of the substrate aerosol flowing along the inner airflow channel 19 to form an aerosol that can be inhaled by the user. The aerosol is filtered by filter 17 and delivered to the user through mouthpiece 22.

In the embodiment shown in FIGS. 7 and 8, spanning element 21 comprises unflavored composition A or unflavored composition B as described above in Table 1.

In the embodiment shown in FIGS. 7 and 8, the flavor material of the flavor substrate 16 includes flavored composition A or flavored composition B described above in Table 1.

FIG. 9 shows a cross-sectional view of an aerosol generation system including an aerosol generation device 200 and an aerosol generation article 10. Aerosol generating article 10 may be any of the articles of FIGS. 1-8.

Aerosol generating device 200 includes a substantially cylindrical device housing 207 having a shape and size similar to a conventional cigar.

Aerosol generator 200 further includes a power source 201 in the form of a rechargeable nickel cadmium battery, a controller 202 in the form of a printed circuit board including a microprocessor, an electrical connector 203, and a heater 204. Heater 204 includes a base heating element 205 configured to heat aerosol-forming substrate 11 and a downstream heating element 206 disposed downstream of base heating element 205 . Downstream heating element 206 is configured to heat flavor substrate 16 and, in corresponding embodiments, permeability control element 20 and spanning element 21 .

In the embodiment of FIG. 9, the base heating element 205 and the downstream heating element 206 are a base induction heating device 205 and a downstream induction heating device 206, respectively, each including at least one inductor coil and at least one susceptor. However, other forms of heating elements may be used, such as resistive heating elements.

Power source 201, controller 202, and induction heating devices 205, 206 are all housed within device housing 207. The induction heating devices 205, 206 of the aerosol generating device 200 are disposed at the proximal end of the device 200. Electrical connector 203 is disposed at the distal end of device housing 207.

As used herein, the term "proximal" refers to the user or mouth end of an aerosol generating device or article. The proximal end of a component of an aerosol generating device or aerosol generating article is the end of the component closest to the user end, or the mouth end of the aerosol generating device or aerosol generating article. As used herein, the term "distal" refers to the end opposite the proximal end.

The controller 202 is configured to control the supply of power from the power source 201 to the induction heating devices 205 and 206. Controller 202 further includes a DC/AC inverter that includes a class D power amplifier. Controller 202 is also configured to control recharging of power source 201 from electrical connector 203. Controller 202 further includes a smoke sensor (not shown) configured to detect when a user withdraws an aerosol-generating article received within device cavity 208 .

Substrate induction heating device 205 includes a substrate inductor coil 209 and a substrate susceptor 210 . Substrate susceptor 210 is a blade susceptor configured to penetrate into aerosol-forming substrate 11 and provide internal heating to aerosol-forming substrate 11 . Substrate inductor coil 209 is tubular in the embodiment of FIG. 9 and is arranged concentrically around a portion of cavity 208 configured to receive aerosol-forming substrate 11. Substrate inductor coil 209 is tubular in the embodiment of FIG.

Base inductor coil 209 is connected to controller 202 and power source 201 , and controller 202 is configured to provide a varying current to base inductor coil 209 . When a varying current is supplied to the substrate inductor coil 209, the substrate inductor coil 209 generates a varying magnetic field, which heats the substrate susceptor 210 by induction.

Downstream induction heating device 206 includes a downstream inductor coil 211 and a downstream susceptor 212. Downstream susceptor 212 is a tubular susceptor configured to be disposed concentrically around a section of aerosol-generating article 10 that includes flavor substrate 16 to provide external heating to flavor substrate 16 . If aerosol-generating article 10 includes permeability control element 20, spanning element 21, or both, downstream susceptor 212 also extends concentrically around the section of aerosol-generating article 10 that includes permeability control element 20 and spanning element 21. configured to be placed. The downstream inductor coil 211 is tubular in the embodiment of FIG. 9 and is arranged concentrically with the downstream susceptor 212.

Downstream inductor coil 211 is connected to controller 202 and power source 201, and controller 202 is configured to provide a varying current to downstream inductor coil 211. When a varying current is supplied to the downstream inductor coil 211, the downstream inductor coil 211 generates a varying magnetic field, which heats the downstream susceptor 212 by induction.

As depicted in FIG. 10, the device housing 207 also defines a base device air inlet 213 proximate the distal end of the cavity 208 for receiving the aerosol generating article 10. Substrate device air inlet 213 is configured to allow ambient air to be drawn into device housing 207 toward aerosol-forming substrate 11 . The device housing 207 also defines a downstream device air inlet 214 . Downstream device air inlet 214 is configured to allow ambient air to be drawn into device housing 202 toward air inlet 15 of tubular element 12 of aerosol-generating article 10 . For this reason, the downstream device air inlet 214 is configured to substantially mate with the air inlet 15 of the tubular element 12 when the aerosol generating article 10 is fully introduced into the device cavity 208.

FIG. 11 shows an external view of the aerosol generator 200 of FIGS. 9 and 10. The outer surfaces of substrate induction heating device 205 and downstream induction heating device 206 are shown in FIG. Upstream of the substrate induction heating device 205, the aerosol generation device 200 includes a button 212 configured to switch on and off components of the heater 204.

The downstream induction heating device 206 is also depicted in FIG. Indicates that it can be attached to.

FIG. 13 is an exploded view of the downstream induction heating device 206 of FIG. 12 depicting the downstream inductor coil 211 and downstream susceptor 212.

Claims (15)

an aerosol-generating article having an upstream end and a downstream end, the aerosol-generating article defining a longitudinal direction between the upstream end and the downstream end, the aerosol-generating article comprising:
an aerosol-forming substrate;
a tubular element disposed downstream of the aerosol-forming substrate and extending along the longitudinal direction, the tubular element comprising an air inlet;
a flavor substrate disposed downstream of the air inlet, the flavor substrate comprising a flavor material, the flavor material having a temperature equal to the permeability transition temperature of the flavor material; or and configured to be substantially fluid-impermeable when the temperature of the flavoring material is below the permeability transition temperature of the flavoring material. and a flavor substrate, wherein the flavor material is a gel composition. the tubular element defines at least one airflow channel establishing uninterrupted fluid communication between an upstream end of the tubular element and a downstream end of the tubular element, and the flavor substrate allowing fluid flowing along the airflow channel to flow downstream of the flavor substrate when the temperature is equal to or greater than the permeability transition temperature of the flavor material; 2. The aerosol-generating article of claim 1, configured to prevent fluid flowing along the airflow channel from flowing downstream of the flavor substrate when below the permeability transition temperature of the flavor material. 3. The aerosol-generating article of claim 1 or 2, wherein the flavor material is thermoreversible. The aerosol-generating article according to any one of claims 1 to 3, wherein the permeability transition temperature of the flavor material is between 70 degrees Celsius and 80 degrees Celsius. The withdrawal resistance of the aerosol-generating article when the temperature of the flavor material is equal to or higher than the permeability transition temperature of the flavor material is such that the temperature of the flavor material is equal to or higher than the permeability transition temperature of the flavor material at least 10 mm H ₂ O, preferably 20 mm H ₂ O, even more preferably 30 mm H ₂ O greater than the withdrawal resistance of the aerosol-generating article at below temperature. Aerosol-generating articles described in . The aerosol-generating article of any one of claims 1-5, wherein the distance between the upstream end of the aerosol-forming substrate and the downstream end of the flavor substrate is less than about 40 millimeters. further comprising an adjustment member disposed on the tubular element and movable relative to the tubular element such that the adjustment member is configured to vary the size of the air inlet. , an aerosol-generating article according to any one of claims 1 to 6. the tubular element comprises an inner tube and an outer tube, the outer tube is disposed about the inner tube, an outer airflow channel is longitudinally bounded by the inner tube and the outer tube, and an inner airflow channel; is longitudinally bounded by the inner tube, and at least the inner airflow channel is adapted to flow the substrate aerosol towards the downstream end. Generated items. 9. The aerosol-generating article of claim 8, wherein the flavor substrate is disposed within the outer airflow channel. further comprising at least one permeability control element;
The at least one permeability control element is fluid permeable when the temperature of the at least one permeability control element is equal to or greater than the permeability transition temperature of the at least one permeability control element. It is configured to be
the at least one permeability control element is substantially fluid impermeable when the temperature of the at least one permeability control element is below the permeability transition temperature of the at least one permeability control element; It is composed of
the at least one permeability control element is disposed within the outer airflow channel, the at least one permeability control element configured such that the temperature of the at least one permeability control element is such that the temperature of the at least one permeability control element is preventing fluid from flowing along the outer airflow channel downstream of the permeability control element when the temperature of the at least one permeability control element is below the permeability transition temperature; 12. The outer airflow channel is configured to allow fluid to flow along the outer airflow channel downstream of the permeability control element when the permeability transition temperature of the permeability control element is equal to or greater than the permeability transition temperature of the permeability control element. The aerosol-generating article according to item 8 or 9. 11. The aerosol generating article of claim 9 or 10, wherein the flavor substrate is a permeability control element. 12. The method according to claim 10 or 11, further comprising a spanning element disposed within the outer airflow channel, the outer airflow channel comprising the air inlet, the air inlet being arranged downstream of the spanning element. Aerosol-generating articles as described. An aerosol-generating article according to any one of claims 1 to 12, further comprising a filter located downstream of the tubular element. An aerosol generation system,
The aerosol-generating article according to any one of claims 1 to 13,
An aerosol generating device comprising a heater, the heater comprising a base heating element configured to heat the aerosol generating article, and a downstream heating element disposed downstream of the base heating element. An aerosol generation system comprising a generator. The aerosol generation according to claim 15, wherein the base heating element is a base induction heating device comprising a base coil and a substrate susceptor, and the downstream heating element is a downstream induction heating device comprising a downstream coil and a downstream susceptor. system.

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