Aerosol-generating systems and aerosol-generating articles comprising aerosol-generating films

Abstract

The aerosol-generating system comprises an aerosol-generating film (4) comprising a cellulosic film-forming agent, a non-cellulosic thickener, and a polyhydric alcohol, a heater assembly (6) for heating the aerosol-generating film (4) to generate an inhalable aerosol, a power source, and control circuitry configured to control the supply of power from the power source to the heating assembly in response to a user's inhalation, the control circuitry being configured to activate the heater assembly (6) in response to successive user inhalations to sequentially heat different portions of the aerosol-generating film (4). The aerosol-generating article comprises a substrate (2) and a plurality of spaced-apart, distinct portions of the aerosol-generating film (4) disposed on the substrate (2), each spaced-apart, distinct portion of the aerosol-generating film (4) comprising a cellulosic film-forming agent, a non-cellulosic thickener, and a polyhydric alcohol.

Description

[Technical field]

[0001] The present invention relates to an aerosol generating system comprising an aerosol-generating film. In particular, the present invention relates to a handheld aerosol generating system configured to evaporate the aerosol-generating film by heating to generate an aerosol that is inhaled by a user. The present invention also relates to an aerosol-generating article comprising an aerosol-generating film. In particular, the present invention relates to an aerosol-generating article comprising an aerosol-generating film for use in a handheld aerosol generating system configured to evaporate the aerosol-generating film by heating to generate an aerosol that is inhaled by a user. [Background technology]

[0002] Aerosol-generating articles are known in the art in which an aerosol-generating substrate, such as a nicotine- or tobacco-containing substrate, is heated rather than burned. Typically, in such heated aerosol-generating articles, an aerosol is generated by transferring heat from a heat source to a physically separated aerosol-generating substrate or material, which may be located in contact with, within, around, or downstream of the heat source. During use of the aerosol-generating article, volatile compounds are released from the aerosol-generating substrate by heat transfer from the heat source and are entrained in the air drawn through the aerosol-generating article. As the released compounds cool, they condense to form an aerosol. Substrates for heated aerosol-generating articles usually include an "aerosol former," which is a compound or mixture of compounds that facilitates the formation of an aerosol during use. Examples of aerosol formers include polyhydric alcohols, such as propylene glycol and glycerin.

[0003] Known heated aerosol-generating articles include, for example, aerosol-generating articles that are electrically heated to generate an aerosol, and aerosol-generating articles in which the aerosol is generated by the transfer of heat from a combustible fuel element or heat source to a physically separate aerosol-forming material.

[0004] Known handheld electrically operated aerosol generating systems include, for example, electrically operated aerosol generating systems comprising an aerosol generating article including an aerosol-generating substrate, and an aerosol generating device including a battery, control circuitry, and an electric heater for heating the aerosol-generating substrate of the aerosol-generating article to generate an aerosol. In some embodiments, the electric heater of the aerosol generating device is inserted into or around the aerosol-generating substrate when the aerosol-generating article is inserted into the aerosol generating device.

[0005] Hand-held, electrically operated aerosol generating systems are also known which include electric heaters arranged to sequentially heat different portions of the aerosol-generating substrate to provide separate puffs.

[0006] For example, US 5,060,671 discloses an article for electrically heating a flavor generating medium to develop inhalable flavorants or other components in the form of a vapor or aerosol. The article has a plurality of charges of flavor generating medium which are heated in sequence to provide individual puffs. The article comprises electrical heating means for individually heating each of the plurality of charges, a source of electrical energy for powering the electrical heating means, and control means for applying electrical energy to the electrical heating means to individually heat one of the plurality of charges. When heated, each of the charges delivers a quantity of flavorant-containing material to the consumer.

[0007] Known aerosol generating systems can suffer from inconsistent aerosol generation per puff, which can be due to variations in the amount of aerosol-generating substrate heated to generate aerosol from one puff to the next, or variations in the composition of the aerosol-generating substrate heated to generate aerosol from one puff to the next.

[0008] It would be desirable to provide an aerosol generation system that results in a more consistent delivery of the aerosol.

[0009] In particular, it would be desirable to provide an aerosol generation system that results in a controlled, consistent, and predetermined amount of aerosol delivered to a user per puff. Summary of the Invention

[0010] The present invention relates to an aerosol generating system. The aerosol generating system may comprise an aerosol-generating film. The aerosol-generating film may comprise a cellulosic film former, a non-cellulosic thickener, and a polyhydric alcohol. The aerosol generating system may comprise a heater assembly for heating the aerosol-generating film to generate an inhalable aerosol. The aerosol generating system may comprise a power source. The aerosol generating system may comprise a control circuit. The control circuit may be configured to control the supply of power from the power source to the heating assembly in response to a user inhalation. The control circuit may be configured to activate the heater assembly to sequentially heat different portions of the aerosol-generating film in response to successive user inhalations.

[0011] According to a first aspect of the present invention, there is provided an aerosol generation system comprising: an aerosol-generating film comprising a cellulosic film-forming agent, a non-cellulosic thickening agent, and a polyhydric alcohol; a heater assembly for heating the aerosol-generating film to generate an inhalable aerosol; a power source; and control circuitry configured to control the supply of power from the power source to the heating assembly in response to a user's inhalation, wherein the control circuitry is configured to activate the heater assembly to sequentially heat different portions of the aerosol-generating film in response to successive user inhalations.

[0012] The present invention also relates to an aerosol-generating article. The aerosol-generating article may comprise a substrate. The aerosol-generating article may comprise a plurality of spaced apart, separate portions of an aerosol-generating film disposed on the substrate. Each spaced apart, separate portion of the aerosol-generating film may comprise a cellulosic film-forming agent, a non-cellulosic thickener, and a polyhydric alcohol.

[0013] According to a second aspect of the present invention, there is provided an aerosol-generating article comprising a support and a plurality of spaced apart, distinct portions of an aerosol-generating film disposed on the support, each spaced apart, distinct portion of the aerosol-generating film comprising a cellulosic film-forming agent, a non-cellulosic thickener, and a polyhydric alcohol.

[0014] As explained further below, an aerosol generating system according to the first aspect of the invention may comprise an aerosol generating article according to the second aspect of the invention.

[0015] As used herein in connection with the present invention, the term "film" is used to describe a solid, layered element having a thickness that is less than its width or length.

[0016] As used herein in connection with the present invention, the term "aerosol-generating film" is used to describe a film that is capable of releasing a volatile compound when heated to generate an aerosol.

[0017] An aerosol generating system according to the present invention comprises an aerosol generating film that includes a combination of a cellulosic film former, a non-cellulosic thickener, and a polyhydric alcohol.

[0018] It has been observed that the inclusion of high levels of polyhydric alcohols, and especially high levels of glycerin, in a liquid film-forming composition can adversely affect the physical stability of a film produced, for example, by casting or extruding the liquid film-forming composition and then drying.

[0019] The inventors have surprisingly found that the inclusion of a cellulosic film former in combination with a non-cellulosic thickener allows for the formation of aerosol-generating films containing high levels of polyhydric alcohols, and particularly high levels of glycerin, and provides improved physical stability.

[0020] In particular, the inventors have surprisingly found that the inclusion of a cellulosic film former in combination with a non-cellulosic thickener allows for the formation of aerosol-generating films containing high levels of polyhydric alcohols, and particularly high levels of glycerin, which substantially maintain their shape and composition over extended periods of time when exposed to ambient or storage conditions.

[0021] The inclusion of a cellulosic film former in combination with a non-cellulosic thickener allows for the formation of aerosol-generating films of predetermined shapes, sizes, and compositions with high precision and reproducibility, including high levels of polyhydric alcohols, and especially high levels of glycerin.

[0022] In use, an aerosol-generating film comprising a cellulosic film former, a non-cellulosic thickener, and a polyhydric alcohol can be heated by the heater assembly of the aerosol-generating system of the present invention to generate an inhalable aerosol comprising the polyhydric alcohol and, if present in the aerosol-generating film, an alkaloid compound such as nicotine, or a cannabinoid compound such as cannabidiol (CBD) or tetrahydrocannabinol (THC), without substantially releasing the liquid phase from the aerosol-generating film.

[0023] In use, the heater assembly of the aerosol generating system of the present invention can heat an aerosol-generating film comprising a cellulosic film former, a non-cellulosic thickener, and a polyhydric alcohol to generate an inhalable aerosol, thereby evaporating substantially all of the components of the aerosol-generating film, particularly by heating the aerosol-generating film to a temperature of about 180 degrees Celsius to about 250 degrees Celsius to generate an inhalable aerosol, thereby evaporating substantially all of the components of the aerosol-generating film, except for a small amount of the cellulosic film former.

[0024] The aerosol-generating system according to the first aspect of the invention, and the aerosol-generating article according to the second aspect of the invention, advantageously allow the aerosol delivery per puff to be precisely and reliably controlled by adjusting the dimensions and composition of the aerosol-generating film.

[0025] The inclusion of an aerosol-generating film comprising a cellulosic film former, a non-cellulosic thickener, and a polyhydric alcohol in the aerosol-generating system and aerosol-generating article according to the first aspect of the present invention enables the aerosol-generating film to generate and deliver a consistent aerosol to a user over successive user inhalations or puffs.

[0026] The aerosol-generating film may be self-supporting. The mechanical and adhesive properties of a self-supporting aerosol-generating film are such that the formed aerosol-generating film can be separated from the support, even if the aerosol-generating film is obtained, for example, by casting a liquid film-forming formulation onto the support.

[0027] The aerosol-generating film can be disposed on a support or sandwiched between other materials, which can enhance the mechanical stability of the film.

[0028] The aerosol-generating film may have a thickness of about 1 millimeter or less. For example, the aerosol-generating film may have a thickness of about 0.8 millimeters or less.

[0029] As used herein in connection with the present invention, the term "thickness" is used to describe the minimum distance measured between opposing substantially parallel surfaces of an aerosol-generating film.

[0030] As further described below, the aerosol-generating film may be formed by drying a cast or extruded aqueous liquid film-forming composition that includes a cellulosic film former, a non-cellulosic thickener, and a polyhydric alcohol. In such embodiments, the cast or extruded aqueous liquid film-forming composition may advantageously not shrink substantially during drying, despite loss of water. As a result, the thickness of the aerosol-generating film may substantially correspond to the thickness of the cast or extruded aqueous liquid film-forming composition.

[0031] Preferably, the aerosol-generating film has a thickness of about 0.6 millimeters or less. More preferably, the aerosol-generating film has a thickness of about 0.4 millimeters or less. Most preferably, the aerosol-generating film has a thickness of about 0.2 millimeters or less.

[0032] Preferably, the aerosol-generating film has a thickness of at least about 0.05 millimeters. More preferably, the aerosol-generating film has a thickness of at least about 0.075 millimeters. Most preferably, the aerosol-generating film has a thickness of at least about 0.1 millimeters.

[0033] The aerosol-generating film may have a thickness of from about 0.05 millimeters to about 1 millimeter. For example, the aerosol-generating article may have a thickness of from about 0.05 millimeters to about 0.8 millimeters.

[0034] The aerosol-generating film preferably has a thickness of about 0.05 millimeters to about 0.6 millimeters. For example, the aerosol-generating film has a thickness of about 0.05 millimeters to about 0.4 millimeters, or about 0.05 millimeters to about 0.2 millimeters.

[0035] More preferably, the aerosol-generating film has a thickness of from about 0.075 millimeters to about 0.6 millimeters. For example, the aerosol-generating film has a thickness of from about 0.075 millimeters to about 0.4 millimeters, or from about 0.075 millimeters to about 0.2 millimeters.

[0036] Most preferably, the aerosol-generating film has a thickness of from about 0.1 millimeters to about 0.6 millimeters. For example, the aerosol-generating film has a thickness of from about 0.1 millimeters to about 0.4 millimeters, or from about 0.1 millimeters to about 0.2 millimeters.

[0037] Aerosol-generating films having a thickness of about 0.1 millimeters to about 0.2 millimeters can advantageously exhibit low thermal inertia and good mechanical strength.

[0038] Preferably, the aerosol-generating film has a basis weight of at least about 60 grams per square meter (gsm). More preferably, the aerosol-generating film has a basis weight of at least about 80 gsm. Most preferably, the aerosol-generating film has a basis weight of at least about 100 gsm. For example, the aerosol-generating film has a basis weight of at least about 120 gsm or at least about 140 gsm.

[0039] Preferably, the aerosol-generating film has a basis weight of about 400 gsm or less. More preferably, the aerosol-generating film has a basis weight of about 350 gsm or less. Most preferably, the aerosol-generating film has a basis weight of about 300 gsm or less. For example, the aerosol-generating film may have a basis weight of about 280 gsm or less or about 260 gsm or less.

[0040] The aerosol-generating film preferably has a basis weight of about 60 gsm to about 400 gsm. For example, the aerosol-generating film may have a basis weight of about 60 gsm to about 350 gsm, about 60 gsm to about 300 gsm, about 60 gsm to about 350 gsm, about 60 gsm to about 300 gsm, about 60 gsm to about 280 gsm, or about 60 gsm to about 260 gsm.

[0041] More preferably, the aerosol-generating film has a basis weight of about 80 gsm to about 400 gsm. For example, the aerosol-generating film may have a basis weight of about 80 gsm to about 350 gsm, about 80 gsm to about 300 gsm, about 80 gsm to about 280 gsm, or about 80 gsm to about 260 gsm.

[0042] Most preferably, the aerosol-generating film has a basis weight of from about 100 gsm to about 400 gsm. For example, the aerosol-generating film may have a basis weight of from about 100 gsm to about 350 gsm, from about 100 gsm to about 300 gsm, from about 100 gsm to about 280 gsm, or from about 100 gsm to about 260 gsm.

[0043] For example, an aerosol-generating film having a basis weight of from about 120 gsm to about 400 gsm, from about 120 gsm to about 350 gsm, from about 120 gsm to about 300 gsm, from about 120 gsm to about 280 gsm, or from about 120 gsm to about 260 gsm.

[0044] For example, an aerosol-generating film having a basis weight of from about 140 gsm to about 400 gsm, from about 140 gsm to about 350 gsm, from about 140 gsm to about 300 gsm, from about 140 gsm to about 280 gsm, or from about 140 gsm to about 260 gsm.

[0045] In embodiments in which the aerosol-generating film is self-supporting, the weight of the aerosol-generating film may be measured directly by weighing the aerosol-generating film.

[0046] In embodiments in which the aerosol-generating film is disposed on a substrate, the weight of the aerosol-generating film can be calculated by weighing the substrate before disposing the aerosol-generating film thereon, then weighing the substrate with the aerosol-generating film disposed thereon, and then subtracting the weight of the substrate from the combined weight of the aerosol-generating film and substrate.

[0047] In embodiments in which the aerosol-generating film is sandwiched between other materials, the weight of the aerosol-generating film can similarly be calculated by subtracting the weight of the other materials from the combined weight of the aerosol-generating film support and the other materials.

[0048] In embodiments in which the aerosol-generating film is formed by drying a cast or extruded aqueous liquid film-forming composition comprising a cellulosic film former, a non-cellulosic thickener, and a polyhydric alcohol, the weight of the aerosol-generating film will generally correspond to the weight of the components of the aqueous liquid film-forming composition minus the weight of the water evaporated during drying of the cast or extruded aqueous liquid film-forming composition.

[0049] The aerosol-generating film comprises a cellulosic film former, a non-cellulosic thickener, and a polyhydric alcohol.

[0050] As used herein in connection with the present invention, the term "cellulosic film former" is used to describe a cellulose polymer that is capable of forming a continuous film by itself or in the presence of a non-cellulosic thickener.

[0051] Preferably, the cellulosic film former is a cellulose ether.

[0052] As used herein in connection with the present invention, the term "non-cellulosic thickener" is used to describe a non-cellulosic material that, when added to an aqueous or non-aqueous liquid film-forming composition, increases the viscosity of the liquid film-forming composition without substantially modifying other properties. Non-cellulosic thickeners can increase the stability and improve the suspension of ingredients in the liquid film-forming composition. Thickeners may also be referred to as "thickening agents" or "rheology modifiers."

[0053] Unless otherwise stated, the weight percentages of the components of the aerosol-generating film listed herein are based on the total weight of the aerosol-generating film.

[0054] The aerosol-generating film may have a cellulosic film-forming agent content of at least about 3 weight percent or at least about 6 weight percent.

[0055] Preferably, the aerosol-generating film has a cellulosic film-former content of at least about 10 percent by weight. For example, the aerosol-generating film may have a cellulosic film-former content of at least about 12 percent by weight or at least about 14 percent by weight. More preferably, the aerosol-generating film has a cellulosic film-former content of at least about 16 percent by weight. Most preferably, the aerosol-generating film has a cellulosic film-former content of at least about 18 percent by weight.

[0056] The aerosol-generating film may have a cellulosic film-forming agent content of about 70 weight percent or less, or about 50 weight percent or less.

[0057] Preferably, the aerosol-generating film has a cellulosic film former content of about 26 weight percent or less. More preferably, the aerosol-generating film has a cellulosic film former content of about 24 weight percent or less. Most preferably, the aerosol-generating film has a cellulosic film former content of about 22 weight percent or less.

[0058] The aerosol-generating film may have a cellulosic film-forming agent content of about 3 weight percent to about 70 weight percent. For example, the aerosol-generating film may have a cellulosic film-forming agent content of about 3 weight percent to about 50 weight percent.

[0059] The aerosol-generating film may have a cellulosic film-forming agent content of about 6 weight percent to about 70 weight percent. For example, the aerosol-generating film may have a cellulosic film-forming agent content of about 6 weight percent to about 50 weight percent.

[0060] The aerosol-generating film preferably has a cellulosic film-forming agent content of about 10 weight percent to about 26 weight percent. For example, the aerosol-generating film may have a cellulosic film-forming agent content of about 10 weight percent to about 24 weight percent, or about 10 weight percent to about 22 weight percent.

[0061] More preferably, the aerosol-generating film has a cellulosic film-forming agent content of about 16 weight percent to about 26 weight percent. For example, the aerosol-generating film may have a cellulosic film-forming agent content of about 16 weight percent to about 24 weight percent, or about 16 weight percent to about 22 weight percent.

[0062] Most preferably, the aerosol-generating film has a cellulosic film-former content of about 18 weight percent to about 26 weight percent. For example, the aerosol-generating film may have a cellulosic film-former content of about 18 weight percent to about 24 weight percent, or about 18 weight percent to about 22 weight percent.

[0063] The aerosol-generating film preferably comprises one or more cellulosic film formers selected from the group consisting of hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), ethylcellulose (EC), hydroxyethyl methylcellulose (HEMC), hydroxyethyl cellulose (HEC), and hydroxypropyl cellulose (HPC).

[0064] More preferably, the aerosol-generating film comprises one or more cellulosic film-forming agents selected from the group consisting of hydroxypropylmethylcellulose (HPMC), methylcellulose (MC), and ethylcellulose (EC).

[0065] Most preferably, the aerosol-generating film comprises hydroxypropyl methylcellulose (HPMC).

[0066] Preferably, the aerosol-generating film has a non-cellulosic thickener content of at least about 1 weight percent. More preferably, the aerosol-generating film has a non-cellulosic thickener content of at least about 2 weight percent. Most preferably, the aerosol-generating film has a non-cellulosic thickener content of at least about 3 weight percent.

[0067] The aerosol-generating film may have a non-cellulosic thickener content of about 50 weight percent or less, or about 25 weight percent or less.

[0068] Preferably, the aerosol-generating film has a non-cellulosic thickener content of about 10 weight percent or less. More preferably, the aerosol-generating film has a non-cellulosic thickener content of about 8 weight percent or less. Most preferably, the aerosol-generating film has a non-cellulosic thickener content of about 6 weight percent or less.

[0069] The aerosol-generating film may have a non-cellulosic thickener content of from about 1 percent to about 50 percent by weight, or from about 1 percent to about 25 percent by weight.

[0070] The aerosol-generating film preferably has a non-cellulosic thickener content of about 1 weight percent to about 10 weight percent. For example, the aerosol-generating film may have a non-cellulosic thickener content of about 1 weight percent to about 8 weight percent, or about 1 weight percent to about 6 weight percent.

[0071] More preferably, the aerosol-generating film has a non-cellulosic thickener content of about 2 weight percent to about 10 weight percent. For example, the aerosol-generating film may have a non-cellulosic thickener content of about 2 weight percent to about 8 weight percent, or about 2 weight percent to about 6 weight percent.

[0072] More preferably, the aerosol-generating film has a non-cellulosic thickener content of about 3 weight percent to about 10 weight percent. For example, the aerosol-generating film may have a non-cellulosic thickener content of about 3 weight percent to about 8 weight percent, or about 3 weight percent to about 6 weight percent.

[0073] Non-cellulosic thickening agents suitable for inclusion in the aerosol-generating films include, but are not limited to, polysaccharide gelling agents and natural gums.

[0074] The aerosol-generating film preferably comprises one or more non-cellulosic thickening agents selected from the group consisting of agar, alginate, xanthan gum, gellan gum, guar gum, gum arabic, locust bean gum, carrageenan, pectin, and starch.

[0075] More preferably, the aerosol-generating film comprises one or more non-cellulosic thickening agents selected from the group consisting of agar, alginate, and xanthan gum.

[0076] Most preferably, the aerosol-generating film comprises agar.

[0077] The aerosol-generating film may have a polyhydric alcohol content of at least about 25 weight percent. For example, the aerosol-generating film may have a polyhydric alcohol content of at least about 30 weight percent.

[0078] Preferably, the aerosol-generating film has a polyhydric alcohol content of at least about 40 weight percent. More preferably, the aerosol-generating film has a polyhydric alcohol content of at least about 42 weight percent. Most preferably, the aerosol-generating film has a polyhydric alcohol content of at least about 44 weight percent.

[0079] Preferably, the aerosol-generating film has a polyhydric alcohol content of about 90 weight percent or less. More preferably, the aerosol-generating film has a polyhydric alcohol content of about 85 weight percent or less. Most preferably, the aerosol-generating film has a polyhydric alcohol content of about 80 weight percent or less.

[0080] The aerosol-generating film may have a polyhydric alcohol content of from about 25 percent to about 90 percent by weight. For example, the aerosol-generating film may have a polyhydric alcohol content of from about 30 percent to about 90 percent by weight.

[0081] The aerosol-generating film preferably has a polyhydric alcohol content of about 40 weight percent to about 90 weight percent. For example, the aerosol-generating film may have a polyhydric alcohol content of about 40 weight percent to about 85 weight percent, or about 40 weight percent to about 80 weight percent.

[0082] More preferably, the aerosol-generating film has a polyhydric alcohol content of from about 42 weight percent to about 90 weight percent. For example, the aerosol-generating film may have a polyhydric alcohol content of from about 42 weight percent to about 85 weight percent, or from about 42 weight percent to about 80 weight percent.

[0083] Most preferably, the aerosol-generating film has a polyhydric alcohol content of from about 44 weight percent to about 90 weight percent. For example, the aerosol-generating film may have a polyhydric alcohol content of from about 44 weight percent to about 85 weight percent, or from about 44 weight percent to about 80 weight percent.

[0084] The aerosol-generating film preferably comprises one or more polyhydric alcohols selected from the group consisting of 1,3-butanediol, glycerin, propylene glycol, and triethylene glycol.

[0085] More preferably, the aerosol-generating film comprises one or more polyhydric alcohols selected from the group consisting of glycerin and propylene glycol.

[0086] Most preferably, the aerosol-generating film comprises glycerin.

[0087] Preferably, the ratio of the weight percent of the cellulosic film former to the weight percent of the polyhydric alcohol in the aerosol-generating film is at least about 0.1, more preferably at least about 0.2, and most preferably at least about 0.3.

[0088] It is preferred that the ratio of the weight percent of the cellulosic film former to the weight percent of the polyhydric alcohol in the aerosol-generating film be about 1 or less.

[0089] The ratio of the weight percent of the cellulosic film-forming agent to the weight percent of the polyhydric alcohol in the aerosol-generating film is preferably from about 0.1 to about 1, more preferably from about 0.2 to about 1, and most preferably from about 0.3 to about 1.

[0090] Preferably, the ratio of the weight percent of the non-cellulosic thickener to the weight percent of the polyhydric alcohol in the aerosol-generating film is at least about 0.05, more preferably at least 0.1, and most preferably at least 0.2.

[0091] The ratio of the weight percent of the non-cellulosic thickener to the weight percent of the polyhydric alcohol in the aerosol-generating film is preferably about .about.0.5 or less.

[0092] The ratio of the weight percent of the non-cellulosic thickener to the weight percent of the polyhydric alcohol in the aerosol-generating film is preferably from about 0.05 to about 0.5, more preferably from about 0.1 to about 0.5, and most preferably from about 0.2 to about 0.5.

[0093] In certain preferred embodiments, the aerosol-generating film may include HPMC and glycerin.

[0094] In such embodiments, the ratio of the weight percent of HPMC to the weight percent of glycerin in the aerosol-generating film is preferably at least about 0.1, more preferably at least about 0.2, and most preferably at least about 0.3.

[0095] Preferably, the ratio of the weight percent of HPMC to the weight percent of glycerin in the aerosol-generating film is about 1 or less.

[0096] The ratio of the weight percent of HPMC to the weight percent of glycerin in the aerosol-generating film is preferably from about 0.1 to about 1, more preferably from about 0.2 to about 1, and most preferably from about 0.3 to about 1.

[0097] In certain preferred embodiments, the aerosol-generating film may include agar and glycerin.

[0098] In such embodiments, the ratio of the weight percent of agar to the weight percent of glycerin in the aerosol-generating film is preferably at least about 0.05, more preferably at least 0.1, and most preferably at least 0.2.

[0099] The ratio of weight percent agar to weight percent glycerin in the aerosol-generating film is preferably about 0.5 or less.

[0100] The ratio of weight percent agar to weight percent glycerin in the aerosol-generating film is preferably from about 0.05 to about 0.5, more preferably from about 0.1 to about 0.5, and most preferably from about 0.2 to about 0.5.

[0101] In certain particularly preferred embodiments, the aerosol-generating film may include HPMC, agar, and glycerin.

[0102] The aerosol-generating film preferably comprises water.

[0103] The aerosol-generating film preferably has a water content of about 30 weight percent or less.

[0104] The aerosol-generating film preferably has a water content of about 10 percent to about 20 percent by weight.

[0105] The aerosol-generating film may comprise an alkaloid compound, or a cannabinoid compound, or both an alkaloid compound and a cannabinoid compound. The aerosol-generating film may comprise one or more alkaloids. The aerosol-generating film may comprise one or more cannabinoids. The aerosol-generating film may comprise a combination of one or more alkaloids and one or more cannabinoids.

[0106] As used herein in connection with the present invention, the term "alkaloid compound" is used to describe any one of a class of naturally occurring organic compounds that contain one or more basic nitrogen atoms. Generally, alkaloid compounds contain at least one nitrogen atom in an amine-type structure. This nitrogen atom or another nitrogen atom in the molecule of the alkaloid compound may be active as a base in an acid-base reaction. Most alkaloid compounds have one or more of the nitrogen atoms of the alkaloid compound as part of a ring system, such as a heterocyclic ring. In nature, alkaloid compounds are found primarily in plants, especially common in certain families of flowering plants. However, some alkaloid compounds are found in animal species and fungi. As used herein in connection with the present invention, the term "alkaloid compound" is used to describe both naturally occurring and synthetically produced alkaloid compounds.

[0107] The aerosol-generating film may include one or more alkaloid compounds selected from the group consisting of nicotine and anatabine.

[0108] The aerosol-generating film may include nicotine.

[0109] As used herein in connection with the present invention, the term "nicotine-containing aerosol-generating film" describes an aerosol-generating film that includes nicotine.

[0110] As used herein in connection with the present invention, the term "nicotine" is used to describe nicotine, nicotine base, or nicotine salts. In embodiments where the aerosol-generating film includes nicotine base or nicotine salts, the amount of nicotine recited herein is the amount of free base nicotine or the amount of protonated nicotine, respectively.

[0111] The aerosol-generating film may contain naturally occurring or synthetically produced nicotine.

[0112] As used herein with respect to the present invention, the term "cannabinoid compound" is used to describe any one of a class of naturally occurring compounds found in parts of the cannabis plant, namely Cannabis sativa, Cannabis indica, and Cannabis ruderalis. Cannabinoid compounds are particularly concentrated in the female flower heads. Naturally occurring cannabinoid compounds in the cannabis plant include cannabidiol (CBD) and tetrahydrocannabinol (THC). As used herein with respect to the present invention, the term "cannabinoid compound" is used to describe both naturally occurring and synthetically produced cannabinoid compounds.

[0113] The aerosol-generating film may comprise one or more cannabinoid compounds selected from the group consisting of cannabidiol (CBD), tetrahydrocannabinol (THC), tetrahydrocannabinolic acid (THCA), cannabidiol acid (CBDA), cannabinol (CBN), cannabigerol (CBG), cannabichromene (CBC), cannabicyclol (CBL), cannabivarin (CBV), tetrahydrocannabivarin (THCV), cannabidivarin (CBDV), cannabichromevarin (CBCV), cannabigerovarin (CBGV), cannabigerol monomethyl ether (CBGM), and cannabiersoin (CBE), cannabicitran (CBT).

[0114] The aerosol-generating film may include one or more cannabinoid compounds selected from the group consisting of cannabidiol (CBD) and THC (tetrahydrocannabinol).

[0115] The aerosol-generating film may include cannabidiol (CBD).

[0116] The aerosol-generating film may include nicotine and cannabidiol (CBD).

[0117] The aerosol-generating film may contain nicotine, cannabidiol (CBD), and THC (tetrahydrocannabinol).

[0118] The aerosol-generating film may include one or more monobasic nicotine salts.

[0119] As used herein with respect to the present invention, the term "monobasic nicotine salt" is used to describe nicotine salts of monobasic acids.

[0120] In embodiments in which the aerosol-generating film comprises an alkaloid compound or a cannabinoid compound, or both an alkaloid compound and a cannabinoid compound, the aerosol-generating film preferably has a combined alkaloid and cannabinoid compound content of at least about 0.5 weight percent. More preferably, the aerosol-generating film has a combined alkaloid and cannabinoid compound content of at least about 1 weight percent. Most preferably, the aerosol-generating film has a combined alkaloid and cannabinoid compound content of at least about 2 weight percent.

[0121] In embodiments in which the aerosol-generating film comprises an alkaloid compound or a cannabinoid compound, or both an alkaloid compound and a cannabinoid compound, the aerosol-generating film may have a combined alkaloid compound and cannabinoid compound content of about 10 weight percent or less.

[0122] In embodiments in which the aerosol-generating film comprises an alkaloid compound or a cannabinoid compound, or both an alkaloid compound and a cannabinoid compound, the aerosol-generating film preferably has a combined alkaloid and cannabinoid compound content of about 6 weight percent or less. More preferably, the aerosol-generating film has a combined alkaloid and cannabinoid compound content of about 5 weight percent or less. Most preferably, the aerosol-generating film has a combined alkaloid and cannabinoid compound content of about to about 4 weight percent or less.

[0123] In embodiments in which the aerosol-generating film includes an alkaloid compound or a cannabinoid compound, or both an alkaloid compound and a cannabinoid compound, the aerosol-generating film may have a combined alkaloid compound and cannabinoid compound content of from about 0.5 percent by weight to about 10 percent by weight.

[0124] In embodiments in which the aerosol-generating film comprises an alkaloid compound or a cannabinoid compound, or both an alkaloid compound and a cannabinoid compound, the aerosol-generating film preferably has a combined alkaloid and cannabinoid compound content of about 0.5 weight percent to about 6 weight percent. For example, the aerosol-generating film may have a combined alkaloid and cannabinoid compound content of about 0.5 weight percent to about 5 weight percent, or about 0.5 weight percent to about 4 weight percent.

[0125] More preferably, the aerosol-generating film has a combined alkaloid and cannabinoid compound content of about 1 to about 6 percent by weight. For example, the aerosol-generating film may have a combined alkaloid and cannabinoid compound content of about 1 to about 5 percent by weight, or about 1 to about 4 percent by weight.

[0126] Most preferably, the aerosol-generating film has a combined alkaloid and cannabinoid compound content of about 2 to about 6 percent by weight. For example, the aerosol-generating film may have a combined alkaloid and cannabinoid compound content of about 2 to about 5 percent by weight, or about 2 to about 4 percent by weight.

[0127] In embodiments in which the aerosol-generating film includes nicotine, the aerosol-generating film preferably has a nicotine content of at least about 0.5 percent by weight, more preferably has a nicotine content of at least about 1 percent by weight, and most preferably has a nicotine content of at least about 2 percent by weight.

[0128] In embodiments in which the aerosol-generating film includes nicotine, the aerosol-generating film may have a nicotine content of about 10 percent by weight or less.

[0129] In embodiments in which the aerosol-generating film includes nicotine, the aerosol-generating film preferably has a nicotine content of about 6 weight percent or less, more preferably about 5 weight percent or less, and most preferably about to about 4 weight percent or less.

[0130] In embodiments in which the aerosol-generating film includes nicotine, the aerosol-generating film may have a nicotine content of from about 0.5 percent to about 10 percent by weight.

[0131] In embodiments in which the aerosol-generating film includes nicotine, the aerosol-generating film preferably has a nicotine content of from about 0.5 weight percent to about 6 weight percent. For example, the aerosol-generating film may have a nicotine content of from about 0.5 weight percent to about 5 weight percent, or from about 0.5 weight percent to about 4 weight percent.

[0132] More preferably, the aerosol-generating film has a nicotine content of from about 1 weight percent to about 6 weight percent. For example, the aerosol-generating film may have a nicotine content of from about 1 weight percent to about 5 weight percent, or from about 1 weight percent to about 4 weight percent.

[0133] Most preferably, the aerosol-generating film has a nicotine content of from about 2 weight percent to about 6 weight percent. For example, the aerosol-generating film may have a nicotine content of from about 2 weight percent to about 5 weight percent, or from about 2 weight percent to about 4 weight percent.

[0134] The aerosol-generating film may have a tobacco content of about 70 weight percent or less, about 50 weight percent or less, about 30 weight percent or less, or about 10 weight percent or less.

[0135] The aerosol-generating film may be a substantially tobacco-free aerosol-generating film.

[0136] As used herein in connection with the present invention, the term "substantially tobacco-free aerosol-generating film" describes an aerosol-generating film that has a tobacco content of less than 1 percent by weight. For example, the aerosol-generating film may have a tobacco content of less than about 0.75 percent by weight, less than about 0.5 percent by weight, or less than about 0.25 percent by weight.

[0137] The aerosol-generating film may be a substantially tobacco-free, nicotine-containing aerosol-generating film.

[0138] The aerosol-generating film may be a tobacco-free aerosol-generating film.

[0139] As used herein in connection with the present invention, the term "tobacco-free aerosol-generating film" describes an aerosol-generating film that has zero percent tobacco content by weight.

[0140] The aerosol-generating film may be a tobacco-free, nicotine-containing aerosol-generating film.

[0141] The aerosol-generating film may include tobacco plant material or a tobacco plant extract. For example, the aerosol-generating film may include tobacco particles, such as lamellar particles of tobacco.

[0142] As used herein in connection with the present invention, the term "tobacco-containing aerosol-generating film" describes an aerosol-generating film that includes tobacco plant material or tobacco extract.

[0143] The aerosol-generating film may include non-tobacco plant materials or non-tobacco plant extracts. The aerosol-generating film may include tobacco materials, or non-tobacco plant materials, or plant extracts. For example, the aerosol-generating film may include particles of plants such as clove and eucalyptus.

[0144] The aerosol-generating film may include an acid.

[0145] The aerosol-generating film preferably comprises one or more organic acids.

[0146] More preferably, the aerosol-generating film comprises one or more carboxylic acids.

[0147] Most preferably, the aerosol-generating film comprises lactic acid or levulinic acid.

[0148] The inclusion of acid is particularly preferred in embodiments in which the aerosol-generating film comprises nicotine. In such embodiments, the presence of acid can stabilize dissolved species in the liquid film-forming composition that forms the aerosol-generating film. Without wishing to be bound by theory, it is believed that acid can interact with nicotine, particularly when nicotine is present in the form of a nicotine salt, and that the interaction between acid and nicotine can reduce or substantially prevent the evaporation of nicotine during the drying of the liquid film-forming composition to form the aerosol-generating film. This can minimize the loss of nicotine during the manufacture of the aerosol-generating film. This can advantageously ensure a high and more precisely controlled delivery of nicotine to the user.

[0149] Preferably, the aerosol-generating film has an acid content of at least about 0.25 weight percent, more preferably at least about 0.5 weight percent, and most preferably at least about 1 weight percent.

[0150] Preferably, the aerosol-generating film has an acid content of about 3.5 weight percent or less. More preferably, the aerosol-generating film has an acid content of about 3 weight percent or less. Most preferably, the aerosol-generating film has an acid content of about 2.5 weight percent or less.

[0151] The aerosol-generating film preferably has an acid content of about 0.25 weight percent to about 3.5 weight percent. For example, the aerosol-generating film may have an acid content of about 0.25 weight percent to about 3 weight percent, or about 0.25 weight percent to about 2.5 weight percent.

[0152] More preferably, the aerosol-generating film has an acid content of from about 0.5 weight percent to about 3.5 weight percent. For example, the aerosol-generating film may have an acid content of from about 0.5 weight percent to about 3 weight percent, or from about 0.5 weight percent to about 2.5 weight percent.

[0153] Most preferably, the aerosol-generating film has an acid content of from about 1 weight percent to about 3.5 weight percent. For example, the aerosol-generating film may have an acid content of from about 1 weight percent to about 3 weight percent, or from about 1 weight percent to about 2.5 weight percent.

[0154] The aerosol-generating film may include one or more flavorants. For example, the aerosol-generating film may include one or more flavorants selected from the group consisting of terpenes and terpenoids. For example, the aerosol-generating film may include menthol, eugenol, or eucalyptol.

[0155] The aerosol-generating film may have a flavorant content of up to about 2 percent by weight.

[0156] The aerosol-generating film may be formed by preparing a liquid film-forming composition that includes a cellulosic film former, a non-cellulosic thickener, and a polyhydric alcohol, casting or extruding the liquid film-forming composition onto a substrate, allowing the liquid film-forming composition to solidify, and then drying the film-forming composition to obtain the aerosol-generating film.

[0157] The aerosol-generating film is preferably formed from an aqueous film-forming composition.

[0158] The heater assembly may be configured to heat the aerosol-generating film to a temperature between about 120 degrees Celsius and about 350 degrees Celsius to generate an inhalable aerosol.

[0159] The heater assembly is preferably configured to heat the aerosol-generating film to a temperature between about 180 degrees Celsius and about 250 degrees Celsius to generate an inhalable aerosol.

[0160] More preferably, the heater assembly is configured to heat the aerosol-generating film to a temperature of between about 200 degrees Celsius and about 220 degrees Celsius to generate an inhalable aerosol.

[0161] Preferably, the aerosol-generating system comprises at least about 20 milligrams of aerosol-generating film, more preferably, the aerosol-generating system comprises at least about 50 milligrams of aerosol-generating film, and most preferably, the aerosol-generating system comprises at least about 100 milligrams of aerosol-generating film.

[0162] The aerosol-generating system may comprise about 300 milligrams or less of the aerosol-generating film. For example, the aerosol-generating system may comprise about 200 milligrams or less of the aerosol-generating film.

[0163] The aerosol-generating system may comprise from about 20 milligrams to about 300 milligrams of the aerosol-generating film. For example, the aerosol-generating system may comprise from about 20 milligrams to about 200 milligrams of the aerosol-generating film.

[0164] The aerosol-generating system may comprise from about 50 milligrams to about 300 milligrams of the aerosol-generating film. For example, the aerosol-generating system may comprise from about 50 milligrams to about 200 milligrams of the aerosol-generating film.

[0165] The aerosol-generating system may comprise from about 100 milligrams to about 300 milligrams of the aerosol-generating film. For example, the aerosol-generating system may comprise from about 100 milligrams to about 200 milligrams of the aerosol-generating film.

[0166] The heater assembly may be configured to heat the aerosol-generating film by conduction to generate an inhalable aerosol.

[0167] The heater assembly may be configured to heat the aerosol-generating film by induction to generate an inhalable aerosol.

[0168] The heater assembly may include one or more heating elements.

[0169] The heater assembly may include one or more flat surface heating elements.

[0170] The heater assembly may include one or more mesh heating elements.

[0171] The heater may include a single or resistive heating element. The heater may include a single or resistive heating element that includes one or more electrically resistive materials. Suitable electrically resistive materials include, but are not limited to, semiconductors such as doped ceramics, "conductive" ceramics (e.g., molybdenum disilicide), carbon, graphite, metals, alloys, and composites of ceramic and metal materials. Such composites may include doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbide. Examples of suitable metals include titanium, zirconium, tantalum platinum, gold, and silver. Examples of suitable metal alloys include stainless steel, nickel-, cobalt-, chromium-, aluminum-, titanium-, zirconium-, hafnium-, niobium-, molybdenum-, tantalum-, tungsten-, tin-, gallium-, manganese-, gold-, and iron-containing alloys, as well as nickel, iron, cobalt, stainless steel-based superalloys, Timetal®, and iron-manganese-aluminum-based alloys. In composite materials, the electrically resistive material may be optionally embedded in, encapsulated in, or coated with an insulating material, or vice versa, depending on the required energy transfer kinetics and external physicochemical properties.

[0172] The heater assembly may include one or more inductive heating elements. The heater assembly may include one or more inductive heating elements including an inductor and a susceptor. The inductor may generate an alternating or varying electromagnetic field that induces eddy currents in the susceptor. Heat may be generated in the susceptor due to resistive losses (Joule or resistive heating). If the susceptor is magnetic, heat may also be generated in the susceptor due to hysteresis losses. The susceptor may heat the aerosol-generating film by conduction.

[0173] The inductor may comprise an induction coil.

[0174] The susceptor may include a ferromagnetic metal. The susceptor may include a ferritic material. The susceptor may include a metallic material. For example, the susceptor may include ferritic iron, ferromagnetic steel, stainless steel, or aluminum.

[0175] The heater assembly may include a plurality of heating elements. The control circuit may be configured to control the supply of power from the power source to each of the plurality of heating elements.

[0176] In embodiments in which the heater assembly comprises multiple heating elements, the heating elements may be positioned to heat different portions of the aerosol-generating film, and in such embodiments, the controller may be configured to sequentially activate the heating elements in response to successive user inhalations.

[0177] The control circuitry may include a microprocessor, which may be a programmable microprocessor, a microcontroller, or an application specific integrated chip (ASIC) or other electronic circuitry capable of providing control.

[0178] The control circuitry may include additional electronic components, for example, the control circuitry may include one or more sensors, one or more switches, one or more display elements, or any combination thereof.

[0179] The control circuitry may include a sensor configured to detect a user's inhalation. The control circuitry may be configured to activate the heater assembly to sequentially heat different portions of the aerosol-generating film in response to successive user inhalations detected by the sensor.

[0180] The control circuitry may include a flow sensor configured to detect changes in air flow that occur when a user inhales on the aerosol generation system.

[0181] The control circuitry may include a pressure sensor configured to detect changes in pressure that occur when a user inhales on the aerosol generation system.

[0182] The control circuitry may include a capacitance sensor configured to detect when a user contacts the aerosol generation system with their lips to inhale the aerosol generation system, for example, the control circuitry may include a capacitance sensor disposed proximate to a mouthpiece of the aerosol generation system.

[0183] The control circuitry may include a mechanism that can be activated by the user to indicate that the user is inhaling. For example, the control circuitry may include a switch that can be pressed by the user to indicate that the user is inhaling.

[0184] The aerosol generation system may include a power source.

[0185] The power source may include a battery. For example, the power source may include a lithium iron phosphate battery.

[0186] The power source may include a rechargeable or non-rechargeable battery.

[0187] The power source may include another form of charge storage device, for example, the power source may include a capacitor.

[0188] The control circuitry may be configured to control the supply of continuous power from the power source to the heating assembly in response to a user's inhalation.

[0189] The control circuitry may be configured to continuously control the delivery of pulsed power from the power source to the heating assembly in response to a user's inhalation.

[0190] The aerosol-generating film may be disposed on a substrate.

[0191] The aerosol-generating film may be disposed on a planar substrate, for example a substantially square, substantially rectangular, substantially circular, or substantially annular.

[0192] The aerosol-generating film may be disposed on an elongated substrate, for example, the aerosol-generating film may be disposed on a continuous or discontinuous elongated substrate tape.

[0193] The aerosol-generating film may be disposed on a tubular support, for example, the aerosol-generating film may be disposed on a substantially cylindrical tubular support.

[0194] The aerosol-generating film may be disposed on a substrate formed from any suitable material or combination of materials, for example, the aerosol-generating film may be disposed on a paper, glass, or cardboard substrate.

[0195] The aerosol-generating film may be disposed on a thermally conductive substrate, for example, a substrate comprising metallized paper, or a substrate comprising metallized cardboard, or a substrate comprising a metal foil laminate.

[0196] In embodiments in which the aerosol-generating film is disposed on a substrate, the heating assembly may be configured to heat the outer surface of the aerosol-generating film.

[0197] As used herein in connection with the present invention, the term "outer surface" is used to describe the surface of the aerosol-generating film disposed on a substrate that is not in contact with the substrate.

[0198] In embodiments in which the aerosol-generating film is disposed on a substrate, the heating assembly may be configured to heat an inner surface of the substrate.

[0199] As used herein in connection with the present invention, the term "inner surface" is used to describe the surface of the support onto which the aerosol-generating film is disposed that is not in contact with the aerosol-generating film.

[0200] The aerosol-generation system may include a drive assembly configured to move the aerosol-generating film relative to the heater assembly.

[0201] The aerosol generation system may include a drive assembly configured to move the heater assembly relative to the aerosol-generating film.

[0202] In embodiments in which the aerosol-generating film is disposed on a substantially circular, planar support, the drive assembly may include a turntable on which the substantially circular, planar support is mounted.

[0203] In embodiments in which the aerosol-generating film is disposed on an elongated support tape, the drive assembly may comprise one or more rotatably mounted drums or reels about which at least a portion of the flexible strip of elongated support tape is wound.

[0204] The control circuitry may be configured to activate the drive assembly between successive user inhalations.

[0205] The aerosol-generating system may comprise a plurality of spaced apart distinct portions of an aerosol-generating film disposed on a substrate.

[0206] The plurality of spaced apart distinct portions of the aerosol-generating film may comprise a regular linear array of spaced apart distinct strips or bands of the aerosol-generating film.

[0207] The plurality of spaced apart distinct portions of the aerosol-generating film comprises a regular two-dimensional array of spaced apart distinct dots or spots of the aerosol-generating film.

[0208] The spaced apart dots or spots may be of any suitable shape, for example the spaced apart dots or spots may be substantially circular, substantially square, or substantially rectangular.

[0209] The control circuitry may be configured to activate the heater assembly to sequentially heat different spaced apart portions of the aerosol-generating film in response to successive user inhalations.

[0210] The control circuitry may be configured to activate the heater assembly to sequentially heat different groups or subsets of the plurality of spaced apart distinct portions of the aerosol-generating film in response to successive user inhalations.

[0211] The control circuitry may be configured to activate the heater assembly to sequentially heat different ones of a plurality of spaced apart distinct portions of the aerosol-generating film in response to successive user inhalations.

[0212] Each spaced apart distinct portion of the aerosol-generating film, when heated, is capable of providing sufficient inhalable aerosol for a single puff.

[0213] Each of the plurality of spaced apart distinct portions of the aerosol-generating film may comprise the same amount of the aerosol-generating film.

[0214] The plurality of spaced apart distinct portions of aerosol-generating film may comprise two or more groups of spaced apart distinct portions of aerosol-generating film comprising different amounts of aerosol-generating film.

[0215] Each spaced apart discrete portion of the aerosol-generating film may comprise from about 2 milligrams to about 30 milligrams of aerosol-generating film. For example, each spaced apart discrete portion of the aerosol-generating film may comprise from about 5 milligrams to about 20 milligrams of aerosol-generating film, or from about 10 milligrams to about 20 milligrams of aerosol-generating film.

[0216] Each of the multiple spaced apart distinct portions of the aerosol-generating film may have the same composition.

[0217] The plurality of spaced apart distinct portions of the aerosol-generating film may comprise two or more groups of spaced apart distinct portions of the aerosol-generating film of different compositions.

[0218] For example, the plurality of spaced apart discrete portions of the aerosol-generating film may comprise a first group of spaced apart discrete portions of the aerosol-generating film comprising a cellulosic film former, a non-cellulosic thickener, a polyhydric alcohol, and nicotine, and a second group of spaced apart discrete portions of the aerosol-generating film comprising a cellulosic film former, a non-cellulosic thickener, a polyhydric alcohol, and a flavorant.

[0219] Each spaced apart discrete portion of the aerosol-generating film may contain from about 90 micrograms to about 1200 micrograms of polyhydric alcohol. For example, each spaced apart discrete portion of the aerosol-generating film may contain from about 90 micrograms to about 1000 micrograms of polyhydric alcohol, or from about 90 micrograms to about 900 micrograms of polyhydric alcohol. For example, each spaced apart discrete portion of the aerosol-generating film may contain from about 150 micrograms to about 850 micrograms of polyhydric alcohol, from about 150 micrograms to about 800 micrograms of polyhydric alcohol, or from about 150 micrograms to about 750 micrograms of polyhydric alcohol.

[0220] Preferably, each spaced apart discrete portion of the aerosol-generating film contains from about 200 micrograms to about 750 micrograms of polyhydric alcohol. For example, each spaced apart discrete portion of the aerosol-generating film may contain from about 200 micrograms to about 700 micrograms of polyhydric alcohol, from about 200 micrograms to about 650 micrograms of polyhydric alcohol, or from about 200 micrograms to about 600 micrograms of polyhydric alcohol.

[0221] More preferably, each spaced apart discrete portion of the aerosol-generating film contains from about 250 micrograms to about 600 micrograms of polyhydric alcohol. For example, each spaced apart discrete portion of the aerosol-generating film may contain from about 250 micrograms to about 550 micrograms of polyhydric alcohol, from about 250 micrograms to about 500 micrograms of polyhydric alcohol, or from about 250 micrograms to about 450 micrograms of polyhydric alcohol.

[0222] Most preferably, each spaced apart discrete portion of the aerosol-generating film contains from about 300 micrograms to about 450 micrograms of polyhydric alcohol. For example, each spaced apart discrete portion of the aerosol-generating film may contain from about 300 micrograms to about 400 micrograms of polyhydric alcohol, or from about 300 micrograms to about 350 micrograms of polyhydric alcohol.

[0223] In embodiments in which the aerosol-generating film comprises nicotine, each spaced apart discrete portion of the aerosol-generating film may comprise from about 20 micrograms to about 150 micrograms of nicotine. For example, each spaced apart discrete portion of the aerosol-generating film may comprise from about 20 micrograms to about 125 micrograms of nicotine, or from about 50 micrograms to about 125 micrograms of nicotine. For example, each spaced apart discrete portion of the aerosol-generating film may comprise from about 20 micrograms to about 100 micrograms of nicotine, or from about 50 micrograms to about 100 micrograms of nicotine. For example, each spaced apart discrete portion of the aerosol-generating film may comprise from about 20 micrograms to about 75 micrograms of nicotine, or from about 50 micrograms to about 75 micrograms of nicotine.

[0224] The aerosol-generating system may comprise from about 2 to about 40 spaced apart distinct portions of the aerosol-generating film disposed on a substrate.

[0225] In certain embodiments, the number of spaced apart discrete portions of the aerosol-generating film disposed on a substrate may be equal to the average number of puffs of a combustible cigarette. For example, the aerosol-generating system may comprise about 7 to about 10 spaced apart discrete portions of the aerosol-generating film disposed on a substrate.

[0226] In certain embodiments, the support may include one or more perforation lines or other lines of weakness to enable a user to select a desired number of spaced apart discrete portions of the aerosol-generating film.

[0227] The aerosol generating system may comprise an aerosol generating article including an aerosol generating film, and an aerosol generating device including a power source and control circuitry.

[0228] As used herein in connection with the present invention, the term "aerosol-generating article" is used to describe an article comprising an aerosol-generating film that is intended to be heated, rather than combusted, to release volatile compounds that can form an aerosol.

[0229] As used herein in connection with the present invention, the term "aerosol-generating device" is used to describe a device that interacts with an aerosol-generating article to generate an aerosol.

[0230] The aerosol generating system may advantageously comprise a consumable aerosol generating article including an aerosol generating film, and a reusable aerosol generating device including a power source and control circuitry.

[0231] The aerosol generating system may comprise an aerosol generating article including an aerosol generating film, and an aerosol generating device including a heater assembly, a power source, and control circuitry.

[0232] The aerosol generating system may comprise an aerosol generating article including an aerosol generating film and a heater assembly, and an aerosol generating device including a power source and control circuitry.

[0233] Where applicable, features described in relation to the aerosol generating system according to the first aspect of the invention may equally apply to the aerosol generating article according to the second aspect of the invention, and vice versa.

[0234] The invention will now be further described, by way of example only, with reference to the accompanying drawings in which: [Brief description of the drawings]

[0235] [Figure 1] FIG. 1 shows a schematic front view of an aerosol generating system according to a first embodiment of the invention, comprising an aerosol generating article according to the first embodiment of the invention. [Diagram 2] FIG. 2 shows a schematic front view of an aerosol generating system according to a second embodiment of the invention, comprising an aerosol generating article according to a second embodiment of the invention. [Diagram 3] FIG. 3 shows a schematic top view of an aerosol generating system according to a third embodiment of the invention, comprising an aerosol generating article according to the third embodiment of the invention. [Figure 4] FIG. 4 shows a schematic top view of an aerosol-generating system according to a fourth embodiment of the invention, comprising an aerosol-generating article according to the fourth embodiment of the invention. [Diagram 5] FIG. 5 shows a schematic cross-sectional view of an aerosol-generating system according to a fifth embodiment of the invention, comprising an aerosol-generating article according to the fifth embodiment of the invention. [Figure 6] FIG. 6 shows a schematic cross-sectional view of an aerosol-generating system according to a sixth embodiment of the invention, comprising an aerosol-generating article according to the sixth embodiment of the invention. [Figure 7] FIG. 7 shows (a) a schematic top view and (b) a schematic right side elevation view of an aerosol generation system according to a seventh embodiment of the present invention. [Figure 8] FIG. 8 shows (a) a schematic top view and (b) a schematic right side elevation view of an aerosol generation system according to an eighth embodiment of the present invention.

[0236] The aerosol generating system according to the first embodiment of the present invention shown in FIG. 1 comprises a consumable aerosol generating article according to the first embodiment of the present invention and a reusable aerosol generating device.

[0237] A consumable aerosol-generating article according to a first embodiment of the present invention comprises a tubular cylindrical support 2 and a plurality of longitudinally extending, circumferentially spaced apart discrete portions or bands of an aerosol-generating film 4 disposed on the outer curved surface of the tubular cylindrical support 2. The tubular cylindrical support 2 may have a length of, for example, about 30 mm to about 150 mm and an outer diameter of, for example, about 5 mm to about 15 mm.

[0238] Each of the plurality of longitudinally extending, circumferentially spaced discrete bands of aerosol-generating film 4 comprises 20 mg of aerosol-generating film having the composition shown in Table 1. [Table 1] Table 1

[0239] The composition and amount of aerosol-generating film in each of the longitudinally extending, circumferentially spaced apart bands of the aerosol-generating film 4 is the same. The aerosol-generating film in each of the longitudinally extending, circumferentially spaced apart bands of the aerosol-generating film 4 comprises a cellulosic film former, a non-cellulosic thickener, and a polyhydric alcohol. The amount of aerosol-generating film in each of the longitudinally extending, circumferentially spaced apart bands of the aerosol-generating film 4 is such that each of the longitudinally extending, circumferentially spaced apart bands of the aerosol-generating film 4, when heated, provides sufficient inhalable aerosol for a single puff.

[0240] The reusable aerosol generating device comprises a heater assembly including a plurality of fixed elongated heating elements 6 for heating a plurality of longitudinally extending, circumferentially spaced apart bands of an aerosol generating film 4 to generate an inhalable aerosol. The plurality of fixed elongated heating elements 6 (shown in dashed and dotted lines in FIG. 1 ) are circumferentially spaced apart about the periphery of the outer curved surface of the tubular cylindrical support 2 such that each of the plurality of fixed elongated heating elements 6 is disposed adjacent the outer surface of a different one of the longitudinally extending, circumferentially spaced apart bands of the aerosol generating film 4. The plurality of fixed elongated heating elements 6 may be flat surface heaters or mesh heaters.

[0241] The reusable aerosol generating device further comprises a power supply and control circuitry (not shown).

[0242] The control circuitry is configured to control the supply of power from the power source to each of the plurality of fixed, elongated heating elements 6. The control circuitry includes a flow sensor (not shown) configured to detect changes in air flow that occur when a user inhales on the aerosol generating system. The control circuitry is configured to sequentially activate the plurality of fixed, elongated heating elements 6 in response to successive user inhalations detected by the flow sensor to sequentially heat different ones of the distinct longitudinally extending, circumferentially spaced bands of the aerosol generating film 4 in response to the successive user inhalations.

[0243] It will be appreciated that in alternative embodiments, the aerosol-generating article may comprise a continuous layer of aerosol-generating film disposed on the outer curved surface of the tubular cylindrical support 2, rather than a plurality of longitudinally extending, circumferentially spaced apart discrete bands of aerosol-generating film 4.

[0244] The consumable aerosol generating system according to the second embodiment of the present invention shown in FIG. 2 comprises a consumable aerosol generating article according to the second embodiment of the present invention and a reusable aerosol generating device.

[0245] The aerosol-generating article according to a second embodiment of the invention comprises a tubular cylindrical support 2 and a plurality of circumferentially extending, longitudinally spaced apart discrete portions or rings of an aerosol-generating film 4 disposed on the outer curved surface of the tubular cylindrical support 2. The tubular cylindrical support 2 may have a length of, for example, about 5 mm to about 150 mm and an outer diameter of, for example, about 5 mm to about 15 mm. Depending on the dimensions of the tubular cylindrical support 2, for example, up to 40 circumferentially extending, longitudinally spaced apart discrete rings of the aerosol-generating film 4 may be disposed on the outer curved surface of the tubular cylindrical support 2.

[0246] Composition and amount of aerosol-generating film in each of the circumferentially extending, longitudinally spaced apart rings of the aerosol-generating film 4. The aerosol-generating film in each of the circumferentially extending, longitudinally spaced apart rings of the aerosol-generating film 4 comprises a cellulosic film former, a non-cellulosic thickener, and a polyhydric alcohol. The amount of aerosol-generating film in each of the circumferentially extending, longitudinally spaced apart rings of the aerosol-generating film 4 is such that each of the circumferentially extending, longitudinally spaced apart rings of the aerosol-generating film 4, when heated, provides sufficient inhalable aerosol for a single puff.

[0247] The reusable aerosol generating device comprises a heater assembly including a plurality of fixed annular heating elements 6 for heating circumferentially extending, longitudinally spaced apart discrete rings of the aerosol generating film 4 to generate an inhalable aerosol. The plurality of fixed annular heating elements 6 are longitudinally spaced apart about the periphery of the outer curved surface of the tubular cylindrical support 2 such that each of the plurality of fixed annular heating elements 6 is disposed adjacent the outer surface of a different one of the circumferentially extending, longitudinally spaced apart discrete rings of the aerosol generating film 4. The plurality of fixed annular heating elements 6 may be flat surface heaters or mesh heaters.

[0248] The reusable aerosol generating device further comprises a power supply and control circuitry (not shown).

[0249] The control circuitry is configured to control the supply of power from the power source to each of the plurality of fixed, annular heating elements 6. The control circuitry includes a flow sensor (not shown) configured to detect changes in air flow that occur when a user inhales on the aerosol generating system. The control circuitry is configured to sequentially activate the plurality of fixed, annular heating elements 6 in response to successive user inhalations detected by the flow sensor to sequentially heat different ones of the distinct circumferentially extending, longitudinally spaced apart rings of the aerosol generating film 4 in response to successive user inhalations.

[0250] It will be appreciated that in alternative embodiments, the aerosol-generating article may comprise a continuous layer of aerosol-generating film disposed on the outer curved surface of the tubular cylindrical support 2, rather than a plurality of circumferentially extending, longitudinally spaced apart discrete rings of aerosol-generating film 4.

[0251] The aerosol generating system according to the third embodiment of the present invention shown in FIG. 3 comprises a consumable aerosol generating article according to the third embodiment of the present invention and a reusable aerosol generating device.

[0252] A consumable aerosol-generating article according to a third embodiment of the present invention comprises a planar support 2 and a regular linear array of spaced apart discrete strips of aerosol-generating film 4 disposed on the upper surface of the planar support 2. The spaced apart discrete strips of aerosol-generating film 4 may have a width, for example, of about 2 mm to about 20 mm, and a length, for example, of about 5 mm to about 50 mm. Depending on the dimensions of the planar support 2, for example, up to 40 spaced apart discrete strips of aerosol-generating film 4 may be disposed on the upper surface of the planar support 2.

[0253] The composition and amount of the aerosol-generating film in each of the spaced apart discrete strips of the aerosol-generating film 4 is the same. The aerosol-generating film in each of the spaced apart discrete strips of the aerosol-generating film 4 comprises a cellulosic film former, a non-cellulosic thickener, and a polyhydric alcohol. The amount of the aerosol-generating film in each of the spaced apart discrete strips of the aerosol-generating film 4 is such that each of the spaced apart discrete strips of the aerosol-generating film 4, when heated, provides sufficient inhalable aerosol for a single puff.

[0254] The reusable aerosol generating device comprises a heater assembly including a plurality of fixed, elongated heating elements (not shown) for heating a regular linear array of spaced-apart discrete strips of aerosol-generating film 4 to generate an inhalable aerosol. The plurality of fixed, elongated heating elements are disposed adjacent to the lower surface of the planar support 2 and are spaced apart such that each of the plurality of fixed, elongated heating elements is positioned directly beneath a different one of the spaced-apart discrete strips of aerosol-generating film 4. The plurality of fixed, elongated heating elements may be flat surface heaters or mesh heaters.

[0255] The reusable aerosol generating device further comprises a power supply and control circuitry (not shown).

[0256] The control circuitry is configured to control the supply of power from the power source to each of the plurality of fixed, elongated heating elements. The control circuitry includes a flow sensor (not shown) configured to detect changes in air flow that occur when a user inhales on the aerosol generating system. The control circuitry is configured to sequentially activate the plurality of fixed, elongated heating elements in response to successive user inhalations detected by the flow sensor to sequentially heat different ones of the separate spaced apart strips of the aerosol generating film 4 in response to successive user inhalations.

[0257] As shown in FIG. 3, perforation lines 8 or other lines of weakness can be provided in the planar support 2 between the spaced-apart, separate strips of aerosol-generating film 4 to allow a user to select a desired number of spaced-apart, separate strips of aerosol-generating film 4 to heat, and thus a desired number of puffs and a desired total amount of aerosol delivery.

[0258] The aerosol generating system according to the fourth embodiment of the present invention shown in FIG. 4 comprises a consumable aerosol generating article according to the fourth embodiment of the present invention and a reusable aerosol generating device.

[0259] The consumable aerosol-generating article according to a fourth embodiment of the present invention shown in Figure 4 is similar to the aerosol-generating article according to the third embodiment of the present invention shown in Figure 2, but rather than a regular linear array of spaced-apart, separate strips of aerosol-generating film, it comprises a regular two-dimensional array of spaced-apart, separate dots of aerosol-generating film 4 disposed on a planar support 2.

[0260] The spaced dots of the aerosol-generating film 4 may be substantially square or substantially circular, as shown in Figure 4. The spaced dots of the aerosol-generating film 4 may be, for example, approximately 25 mm apart. 2 ~ approx. 400mm 2and a length, for example, of about 5 mm to about 50 mm. Depending on the dimensions of the planar support 2, for example, up to 40 separate, spaced apart dots of aerosol-generating film 4 can be disposed on the upper surface of the planar support 2.

[0261] The reusable aerosol generating device comprises a heater assembly including a plurality of fixed heating elements (not shown) for heating a regular two-dimensional array of spaced apart discrete dots of an aerosol-generating film 4 to generate an inhalable aerosol. The plurality of fixed heating elements are disposed adjacent to the lower surface of the planar support 2 and are spaced apart such that each of the plurality of fixed heating elements is positioned directly beneath a different one of the spaced apart discrete dots of the aerosol-generating film 4. The plurality of fixed elongated heating elements may be flat surface heaters or mesh heaters.

[0262] The reusable aerosol generating device further comprises a power supply and control circuitry (not shown).

[0263] The control circuitry is configured to control the supply of power from the power source to each of the plurality of fixed elongated heating elements. The control circuitry includes a flow sensor (not shown) configured to detect changes in air flow that occur when a user inhales on the aerosol generating system. The control circuitry is configured to sequentially activate the plurality of fixed heating elements in response to successive user inhalations detected by the flow sensor to sequentially heat different ones of the spaced apart discrete dots of the aerosol generating film 4 in response to successive user inhalations.

[0264] As shown in FIG. 4, perforation lines 8 or other lines of weakness can be provided in the planar support 2 between the spaced apart discrete dots of the aerosol-generating film 4 to allow a user to select a desired number of spaced apart discrete dots of the aerosol-generating film 4 for heating, and thus a desired number of puffs and a desired total amount of aerosol delivery.

[0265] It will be appreciated that in an alternative embodiment, the heater assembly may comprise a plurality of fixed, elongated heating elements for heating a regular two-dimensional array of spaced-apart discrete dots of the aerosol-generating film 4 to generate an inhalable aerosol. The plurality of fixed, elongated heating elements may be disposed adjacent the lower surface of the planar support 2 and spaced apart such that each of the plurality of fixed, elongated heating elements is positioned beneath a different row or column of the spaced-apart discrete dots of the aerosol-generating film 4. The control circuitry may be configured to sequentially activate the plurality of fixed, elongated heating elements in response to successive user inhalations detected by the flow sensor to sequentially heat the different rows or columns of the spaced-apart discrete dots of the aerosol-generating film 4 in response to successive user inhalations.

[0266] The aerosol generating system according to the fifth embodiment of the present invention shown in FIG. 6 comprises a consumable aerosol generating article according to the fifth embodiment of the present invention and a reusable aerosol generating device.

[0267] The consumable aerosol-generating article according to the fifth embodiment of the present invention shown in Figure 5 is the same as the aerosol-generating article according to the third embodiment of the present invention shown in Figure 3, and comprises a planar support 2 and a regular linear array of spaced apart discrete strips of aerosol-generating film 4 disposed on the upper surface of the planar support 2.

[0268] The reusable aerosol generating device comprises a heater assembly including a plurality of elongated heating elements 6 for heating a regular linear array of spaced apart discrete strips of an aerosol-generating film 4 to generate an inhalable aerosol. The heating assembly is hinged to a planar support 2. By pivoting the heating assembly, the elongated heating elements 6 can be positioned adjacent to the upper surface of the planar support 2 and spaced apart such that each of the plurality of elongated heating elements is positioned directly above a different one of the spaced apart discrete strips of the aerosol-generating film 4. The plurality of elongated heating elements can be flat surface heaters or mesh heaters.

[0269] The reusable aerosol generating device further comprises a power supply and control circuitry (not shown).

[0270] The control circuitry is configured to control the supply of power from the power source to each of the plurality of fixed elongated heating elements. The control circuitry includes a flow sensor 10 configured to detect changes in air flow that occur when a user inhales on the aerosol generating system. The control circuitry is configured to sequentially activate the plurality of elongated heating elements in response to successive user inhalations detected by the flow sensor to sequentially heat different ones of the separate spaced apart strips of the aerosol generating film 4 in response to successive user inhalations.

[0271] The aerosol generating system according to the sixth embodiment of the present invention shown in FIG. 6 comprises a consumable aerosol generating article according to the sixth embodiment of the present invention and a reusable aerosol generating device.

[0272] A consumable aerosol-generating article according to a sixth embodiment of the present invention comprises a continuous elongated support tape 2 and a plurality of longitudinally spaced apart discrete portions of an aerosol-generating film 4 disposed on the outer surface of the continuous elongated support tape 2. As shown in FIG. 6, the continuous elongated support tape 2 is wound around a pair of spaced apart drums or wheels 12. The wheels 12 may have an outer diameter of, for example, about 20 mm to about 80 mm. The continuous elongated support tape 2 may have a length of, for example, about 150 mm to about 650 mm. Depending on the dimensions of the continuous elongated support tape 2, for example, up to 40 longitudinally spaced apart discrete portions of the aerosol-generating film 4 may be disposed on the outer surface of the elongated support tape 2.

[0273] The composition and amount of the aerosol-generating film in each of the longitudinally spaced apart portions of the aerosol-generating film 4 is the same. The aerosol-generating film in each of the longitudinally spaced apart portions of the aerosol-generating film 4 comprises a cellulosic film former, a non-cellulosic thickener, and a polyhydric alcohol. The amount of the aerosol-generating film in each of the longitudinally spaced apart portions of the aerosol-generating film 4 is such that each of the longitudinally spaced apart portions of the aerosol-generating film 4, when heated, provides sufficient inhalable aerosol for a single puff.

[0274] The reusable aerosol generating device comprises a heater assembly including a heating element 6 for heating an aerosol-generating film 4 to generate an inhalable aerosol. The heating element 6 is disposed adjacent to the inner surface of the continuous elongate carrier tape 2. The heating element 6 may be a flat surface heater or a mesh heater.

[0275] The reusable aerosol generating device further comprises a power source, control circuitry, and a drive assembly (not shown).

[0276] The drive assembly is configured to drive one or both of the wheels 12 to move the continuous elongate carrier tape 2 relative to the heating element 6 .

[0277] The control circuitry includes a flow sensor (not shown) configured to detect changes in air flow that occur when a user inhales on the aerosol generating system. The control circuitry is configured to control the supply of power from the power source to the heating element 6 in response to a user inhalation detected by the flow sensor. The control circuitry is configured to activate the drive assembly between successive user inhalations to move the successive elongated support tape 2 relative to the heating element 6 between successive user inhalations. By moving the successive elongated support tape 2 relative to the heating element 6 between successive user inhalations, the control circuitry is configured to activate the heating element 6 in response to successive user inhalations to sequentially heat different longitudinally spaced portions of the aerosol-generating film 4 disposed on an outer surface of the successive elongated support tape 2.

[0278] It will be appreciated that in alternative embodiments, the aerosol-generating article may comprise a continuous layer of aerosol-generating film disposed on the outer surface of the elongate carrier tape 2, rather than a plurality of longitudinally spaced apart discrete portions of aerosol-generating film 4.

[0279] It will also be appreciated that in alternative embodiments, the elongated substrate tape 2 may be wound on a supply reel, initially empty, and attached to a take-up reel that is driven by a drive assembly to move the continuous elongated substrate tape 2 relative to the heating element 6. In such embodiments, the reusable aerosol-generating article may resemble a cassette tape.

[0280] It will also be appreciated that in alternative embodiments, the aerosol-generating film may be disposed on the outer surface of a discontinuous elongate carrier tape.

[0281] It will be further appreciated that in alternative embodiments, the consumable aerosol generating article may comprise a heater assembly including a heating element rather than a reusable aerosol generating device.

[0282] An aerosol generating system according to a seventh embodiment of the present invention shown in FIG. 7 comprises a consumable aerosol generating article and a reusable aerosol generating device.

[0283] The consumable aerosol-generating article comprises a planar, substantially square support 2 and an aerosol-generating film 4 disposed on the upper surface of the planar, substantially square support 2. The planar, substantially square support 2 may have a length and width of, for example, about 5 mm to about 80 mm.

[0284] The aerosol-generating film 4 comprises a cellulosic film-forming agent, a non-cellulosic thickening agent, and a polyhydric alcohol.

[0285] The reusable aerosol generating device comprises a heater assembly including a planar rectangular heating element 6 for heating an aerosol-generating film 4 to generate an inhalable aerosol. The planar rectangular heating element 6 (shown by dashed and dotted lines in the schematic top view of FIG. 7(a)) is disposed adjacent to the underside of a planar substantially square support 2. The planar rectangular heating element 6 may be a flat surface heater or a mesh heater.

[0286] The reusable aerosol generating device further comprises a power source, control circuitry, and a drive assembly (not shown).

[0287] The drive assembly is configured to move the planar rectangular heating element 6 relative to the planar substantially square support 2 .

[0288] The control circuitry includes a flow sensor (not shown) configured to detect changes in air flow that occur when a user inhales on the aerosol generating system. The control circuitry is configured to control the supply of power from the power source to the planar rectangular heating element 6 in response to a user inhalation detected by the flow sensor. The control circuitry is configured to activate the drive assembly between successive user inhalations to move the planar rectangular heating element 6 relative to the planar substantially square support 2 between successive user inhalations. By moving the planar rectangular heating element 6 relative to the planar substantially square support 2 between successive user inhalations, the control circuitry is configured to activate the planar rectangular heating element 6 to sequentially heat different portions of the aerosol-generating film 4 disposed on the top surface of the planar substantially square support 2 in response to successive user inhalations.

[0289] It will be appreciated that in alternative embodiments, the planar support 2 may be of different shapes, for example the planar support 2 may be substantially rectangular or substantially circular.

[0290] It will also be appreciated that in alternative embodiments, the control circuitry and drive assembly may be configured to move the planar support 2 relative to the planar heating element 6 between successive user inhalations.

[0291] An aerosol generating system according to an eighth embodiment of the present invention shown in FIG. 8 comprises a consumable aerosol generating article and a reusable aerosol generating device.

[0292] The consumable aerosol-generating article comprises a flat, annular support 2 and an aerosol-generating film 4 disposed on the upper surface of the flat, annular support 2. The aerosol-generating film 4 contains a cellulose-based film-forming agent, a non-cellulose-based thickener, and a polyhydric alcohol. The flat, annular support 2 may have an outer diameter of, for example, about 30 mm to about 150 mm.

[0293] The reusable aerosol generating device comprises a heater assembly including a planar trapezoidal heating element 6 for heating an aerosol-generating film 4 to generate an inhalable aerosol. The planar trapezoidal heating element 6 (shown by dashed and dotted lines in the schematic top view of FIG. 8(a)) is disposed adjacent to the lower surface of the planar annular support 2. The planar trapezoidal heating element 6 may be a flat surface heater or a mesh heater.

[0294] The reusable aerosol generating device further comprises a power source, control circuitry, and a drive assembly (not shown).

[0295] The drive assembly is configured to rotate the planar annular support 2 relative to the planar trapezoidal heating element 6 .

[0296] The control circuitry includes a flow sensor (not shown) configured to detect changes in air flow that occur when a user inhales on the aerosol generating system. The control circuitry is configured to control the supply of power from the power source to the planar trapezoidal heating element 6 in response to a user inhalation detected by the flow sensor. The control circuitry is configured to activate the drive assembly between successive user inhalations to rotate the planar annular support 2 relative to the planar trapezoidal heating element 6 between successive user inhalations. By rotating the planar annular support 2 relative to the planar trapezoidal heating element 6 between successive user inhalations, the control circuitry is configured to activate the planar trapezoidal heating element 6 to sequentially heat different portions of the aerosol-generating film 4 disposed on the upper surface of the planar annular support 2 in response to successive user inhalations.

[0297] It will be appreciated that in alternative embodiments, the control circuitry and drive assembly may be configured to rotate the planar trapezoidal heating element 6 relative to the annular support 2 between successive user inhalations.

Claims

1. 1. An aerosol generation system comprising: an aerosol-generating film comprising a cellulosic film former, a non-cellulosic thickener, and a polyhydric alcohol; a heater assembly for heating the aerosol-generating film to generate an inhalable aerosol; Power supply, a control circuit configured to control a supply of power from the power source to the heater assembly in response to an inhalation by a user; An aerosol generating system, wherein the cellulose-based film-forming agent is a cellulose ether, and the control circuit is configured to activate the heater assembly to sequentially heat different portions of the aerosol-generating film in response to successive user inhalations.

2. 2. The aerosol generation system of claim 1, wherein the heater assembly comprises a plurality of heating elements, and the control circuit is configured to control the supply of power from the power source to each of the plurality of heating elements.

3. 3. The aerosol generating system of claim 2, wherein the heating elements are positioned to heat different portions of the aerosol generating film, and the control circuit is configured to sequentially activate the heating elements in response to successive user inhalations.

4. 4. An aerosol generation system according to claim 1, comprising a drive assembly configured to move the aerosol-generating film relative to the heater assembly.

5. 5. An aerosol generation system according to claim 1, comprising a drive assembly configured to move the heater assembly relative to the aerosol-generating film.

6. 6. The aerosol generating system of claim 4 or 5, wherein the control circuit is configured to activate the drive assembly between successive user inhalations.

7. 7. An aerosol generating system according to any one of claims 1 to 6, comprising a plurality of spaced apart distinct portions of the aerosol generating film disposed on a support.

8. The aerosol generating system of claim 7, wherein the control circuit is configured to activate the heater assembly to sequentially heat different spaced apart discrete portions of the aerosol generating film in response to successive user inhalations.

9. 9. The aerosol generating system of claim 8, wherein the control circuit is configured to activate the heater assembly to sequentially heat different ones of the plurality of spaced apart discrete portions of the aerosol generating film in response to successive user inhalations.

10. 1. An aerosol-generating article comprising: A support; a plurality of spaced apart, distinct portions of an aerosol-generating film disposed on the substrate; 1. An aerosol-generating article, wherein each spaced apart distinct portion of the aerosol-generating film comprises a cellulosic film former, a non-cellulosic thickener, and a polyhydric alcohol, the cellulosic film former being a cellulose ether.

11. 11. The aerosol-generating article of claim 10, wherein the plurality of spaced apart distinct portions of aerosol-generating film comprises a regular linear array of spaced apart distinct strips or bands of aerosol-generating film.

12. 12. An aerosol-generating article according to claim 10 or 11, wherein the plurality of spaced apart distinct portions of the aerosol-generating film comprise a regular two-dimensional array of spaced apart distinct dots of the aerosol-generating film.

13. 13. An aerosol-generating article according to any one of claims 10 to 12, wherein each spaced apart distinct portion of the aerosol-generating film, when heated, provides sufficient inhalable aerosol for a single puff.

14. 14. The aerosol-generating article of any one of claims 10 to 13, wherein each spaced apart distinct portion of the aerosol-generating film has a polyhydric alcohol content of at least 40 weight percent.

15. 15. An aerosol-generating article according to any one of claims 10 to 14, wherein each spaced apart distinct portion of the aerosol-generating film has a nicotine content of at least 0.5 percent by weight.

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