Aerosol-generating system and aerosol-generating article comprising aerosol-generating film

Abstract

To provide an aerosol-generating system that provides for a controlled and consistent predetermined amount of aerosol to be delivered to a user per puff.SOLUTION: An aerosol-generating system comprises: an aerosol-generating film 4 comprising a cellulose based film-forming agent, a non cellulose based thickening agent, and a polyhydric alcohol; a heater assembly for heating the aerosol-generating film to generate an inhalable aerosol; a power supply; and control circuitry configured to control a supply of power from the power supply to the heating assembly in response to a user inhalation. 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.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an aerosol generation system comprising an aerosol generation film. In particular, the present invention relates to a handheld aerosol generation system configured to evaporate an aerosol generation film by heating to generate an aerosol for a user to inhale. The present invention also relates to an aerosol generation article comprising an aerosol generation film. In particular, the present invention relates to an aerosol generation article comprising an aerosol generation film for use in a handheld aerosol generation system configured to evaporate the aerosol generation film by heating to generate an aerosol for a user to inhale.

Background Art

[0002] Aerosol generation articles are known in the art in which an aerosol generation substrate, such as a nicotine-containing substrate or a tobacco-containing substrate, is heated rather than burned. Typically, in such heated aerosol generation articles, the aerosol is generated by transferring heat from a heat source to a physically separated aerosol generation substrate or material, which may be in contact with the heat source, within the heat source, around the heat source, or downstream of the heat source. During use of the aerosol generation article, volatile compounds are released from the aerosol generation substrate by heat transfer from the heat source and entrained in the air drawn through the aerosol generation article. The released compounds condense as they cool to form an aerosol. The substrate for a heated aerosol generation article usually contains an "aerosol former", which is a compound or mixture of compounds that facilitates aerosol formation 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 an aerosol is generated by the transfer of heat from a combustible fuel element or heat source to an aerosol-forming material physically separated therefrom.

[0004] Known hand-held electrically operated aerosol generating systems include, for example, an aerosol generating article including an aerosol generating substrate, and an aerosol generating device including a battery, a control circuit, 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] Also known is a hand-held electrically operated aerosol generating system comprising an electric heater arranged to sequentially heat different parts of the aerosol generating substrate to provide individual puffs.

[0006] For example, US5,060,671 discloses an article that electrically heats a flavor generating medium to develop an inhalable flavorant or other component in the form of a vapor or aerosol. The article has a plurality of cartridges of the flavor generating medium that are sequentially heated to provide individual puffs. The article comprises electric heating means for individually heating each of the plurality of cartridges, a source of electrical energy for powering the electric heating means, and control means for applying electrical energy to the electric heating means to individually heat one of the plurality of cartridges. When heated, each of the cartridges delivers an amount of flavorant-containing material to the consumer.

[0007] Known aerosol generation systems may suffer from the problem that the amount of aerosol generated per puff is not constant. This can be due to variations in the amount of the aerosol generation substrate that is heated to generate aerosol per puff, or variations in the composition of the aerosol generation substrate that is heated to generate aerosol per puff.

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

[0009] In particular, it would be desirable to provide an aerosol generation system that provides a controlled and consistent predetermined amount of aerosol delivered to the user per puff. SUMMARY OF THE INVENTION

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

[0011] According to a first aspect of the present invention, there is provided an aerosol generating system comprising an aerosol generating film containing a cellulose-based film former, a non-cellulose-based thickener, and a polyhydric alcohol, a heater assembly for heating the aerosol generating film to generate an inhalable aerosol, a power source, and a control circuit 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 circuit is configured to activate the heater assembly in response to successive user inhalations to sequentially heat different portions of the aerosol generating film.

[0012] The present invention also relates to an aerosol generating article. The aerosol generating article may comprise a support. The aerosol generating article may comprise a plurality of spaced-apart discrete portions of an aerosol generating film disposed on the support. Each of the spaced-apart discrete portions of the aerosol generating film may contain a cellulose-based film former, a non-cellulose-based 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 discrete portions of an aerosol generating film disposed on the support, wherein each of the spaced-apart discrete portions of the aerosol generating film contains a cellulose-based film former, a non-cellulose-based thickener, and a polyhydric alcohol.

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

[0015] As used herein in the context of the present invention, the term "film" is used to describe a solid, layer-like element having a thickness that is small compared to 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, when heated to generate an aerosol, can release volatile compounds.

[0017] An aerosol-generating system according to the present invention comprises an aerosol-generating film comprising a combination of a cellulose-based film-forming agent, a non-cellulose-based thickening agent, and a polyhydric alcohol.

[0018] It has been observed that including a high level of polyhydric alcohol, and in particular a high level of glycerin, in a liquid film-forming composition can have an adverse effect on the physical stability of the film produced, for example, by casting or extrusion molding the liquid film-forming composition and then drying it.

[0019] Surprisingly, the inventors have found that including a cellulose-based film-forming agent in combination with a non-cellulose-based thickening agent enables the formation of an aerosol-generating film containing a high level of polyhydric alcohol, and in particular a high level of glycerin, with improved physical stability.

[0020] In particular, the inventors have surprisingly found that including a cellulose-based film-forming agent in combination with a non-cellulose-based thickening agent enables the formation of an aerosol-generating film containing a high level of polyhydric alcohol, and in particular a high level of glycerin, and that the aerosol-generating film substantially maintains its shape and composition over a long period of time when exposed to ambient environmental or storage conditions.

[0021] Including a cellulose-based film-forming agent in combination with a non-cellulose-based thickening agent enables the formation of an aerosol-generating film of a predetermined shape, size, and composition with high precision and reproducibility, containing a high level of polyhydric alcohol, and in particular a high level of glycerin.

[0022] Upon use, by heating an aerosol-generating film containing a cellulose-based film-forming agent, a non-cellulose-based thickener, and a polyhydric alcohol with the heater assembly of the aerosol generation system of the present invention, an inhalable aerosol containing a 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) can be generated without substantially releasing the liquid phase from the aerosol-generating film.

[0023] Upon use, by heating an aerosol-generating film containing a cellulose-based film-forming agent, a non-cellulose-based thickener, and a polyhydric alcohol with the heater assembly of the aerosol generation system of the present invention to generate an inhalable aerosol, substantially all of the aerosol-generating film can be evaporated. In particular, by heating the aerosol-generating film to a temperature of about 180 degrees Celsius to about 250 degrees Celsius to generate an inhalable aerosol, substantially all of the components of the aerosol-generating film other than a small amount of the cellulose-based film-forming agent can be evaporated.

[0024] In the aerosol generation system according to the first aspect of the present invention and the aerosol generation article according to the second aspect of the present invention, advantageously, the aerosol delivery per puff can be accurately and reliably controlled by adjusting the dimensions and composition of the aerosol-generating film.

[0025] By including an aerosol-generating film containing a cellulose-based film-forming agent, a non-cellulose-based thickener, and a polyhydric alcohol in the aerosol generation system and the aerosol generation article according to the first aspect of the present invention, the aerosol-generating film can generate and deliver a consistent aerosol over continuous user inhalation or puffing, making it possible to deliver to the user.

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

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

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

[0029] As used herein in the context of the present invention, the term "thickness" is used to describe the minimum distance measured between substantially parallel surfaces of the aerosol generating film that face each other.

[0030] As will be further described below, the aerosol generating film can be formed by drying a cast or extruded aqueous liquid film-forming composition comprising a cellulose-based film-forming agent, a non-cellulose 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 the loss of water. As a result, the thickness of the aerosol generating film can substantially correspond to the thickness of the cast or extruded aqueous liquid film-forming composition.

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

[0032] The aerosol generating film preferably has a thickness of at least about 0.05 millimeters. The aerosol generating film more preferably has a thickness of at least about 0.075 millimeters. The aerosol generating film most preferably has a thickness of at least about 0.1 millimeters.

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

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

[0035] The aerosol generating film more preferably 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] The aerosol generating film most preferably 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] An aerosol generating film having a thickness of from about 0.1 millimeters to about 0.2 millimeters can advantageously exhibit low thermal inertia and good mechanical strength.

[0038] The aerosol generating film preferably 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] The aerosol generating film preferably 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 about 100 gsm to about 400 gsm. For example, the aerosol generating film may have a basis weight of about 100 gsm to about 350 gsm, about 100 gsm to about 300 gsm, about 100 gsm to about 280 gsm, or 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 where the aerosol generating film is self - supporting, the weight of the aerosol generating film can be directly measured by weighing the aerosol generating film.

[0046] In embodiments where the aerosol generating film is disposed on a support, the weight of the aerosol generating film can be calculated by weighing the support before disposing the aerosol generating film thereon, then weighing the support together with the disposed aerosol generating film, and then subtracting the weight of the support from the total weight of the aerosol generating film and the support.

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

[0048] In embodiments where the aerosol generating film is formed by drying a cast or extruded aqueous liquid film - forming composition comprising a cellulose - based film - forming agent, a non - cellulose - based 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 contains a cellulose-based film former, a non-cellulose thickener, and a polyhydric alcohol.

[0050] As used herein in the context of the present invention, the term "cellulose-based film former" is used to describe a cellulose polymer that can form a continuous film by itself or in the presence of a non-cellulose thickener.

[0051] The cellulose-based film former is preferably a cellulose ether.

[0052] As used herein in the context of the present invention, the term "non-cellulose thickener" is used to describe a non-cellulose substance that increases the viscosity of an aqueous or non-aqueous liquid film-forming composition without substantially modifying other properties when added to the liquid film-forming composition. The non-cellulose thickener can increase stability and improve the suspension of components in the liquid film-forming composition. The thickener may also be referred to as a "thickening agent" or a "rheology modifier".

[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 can have a cellulose-based film former content of at least about 3 weight percent or at least about 6 weight percent.

[0055] The aerosol generating film preferably has a cellulose-based film-forming agent content of at least about 10 weight percent. For example, the aerosol generating film can have a cellulose-based film-forming agent content of at least about 12 weight percent or at least about 14 weight percent. More preferably, the aerosol generating film has a cellulose-based film-forming agent content of at least about 16 weight percent. Most preferably, the aerosol generating film has a cellulose-based film-forming agent content of at least about 18 weight percent.

[0056] The aerosol generating film can have a cellulose-based film-forming agent content of about 70 weight percent or less or about 50 weight percent or less.

[0057] The aerosol generating film preferably has a cellulose-based film-forming agent content of about 26 weight percent or less. More preferably, the aerosol generating film has a cellulose-based film-forming agent content of about 24 weight percent or less. Most preferably, the aerosol generating film has a cellulose-based film-forming agent content of about 22 weight percent or less.

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

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

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

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

[0062] Most preferably, the aerosol generating film has a cellulose-based film-forming agent content of about 18 wt% to about 26 wt%. For example, the aerosol generating film may have a cellulose-based film-forming agent content of about 18 wt% to about 24 wt%, or about 18 wt% to about 22 wt%.

[0063] The aerosol generating film preferably contains one or more cellulose-based film-forming agents selected from the group consisting of hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), ethylcellulose (EC), hydroxyethyl methylcellulose (HEMC), hydroxyethylcellulose (HEC), and hydroxypropylcellulose (HPC).

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

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

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

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

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

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

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

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

[0072] The aerosol generating film preferably has a non-cellulosic thickener content of from about 3 wt% to about 10 wt%. For example, the aerosol generating film can have a non-cellulosic thickener content of from about 3 wt% to about 8 wt%, or from about 3 wt% to about 6 wt%.

[0073] Suitable non-cellulosic thickeners for inclusion in the aerosol generating film include, but are not limited to, polysaccharide gelling agents and natural rubbers.

[0074] The aerosol generating film preferably contains one or more non-cellulosic thickeners 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 contains one or more non-cellulosic thickeners selected from the group consisting of agar, alginate, and xanthan gum.

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

[0077] The aerosol generating film can have a polyhydric alcohol content of at least about 25 wt%. For example, the aerosol generating film can have a polyhydric alcohol content of at least about 30 wt%.

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

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

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

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

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

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

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

[0085] The aerosol generating film more preferably contains one or more polyhydric alcohols selected from the group consisting of glycerin and propylene glycol.

[0086] The aerosol generating film most preferably contains glycerin.

[0087] The ratio of the weight percentage of the cellulose-based film-forming agent to the weight percentage of the polyhydric alcohol 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.

[0088] The ratio of the weight percentage of the cellulose-based film-forming agent to the weight percentage of the polyhydric alcohol in the aerosol generating film is preferably about 1 or less.

[0089] The ratio of the weight percentage of the cellulose-based film-forming agent to the weight percentage 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] The ratio of the weight percentage of the non-cellulose thickener to the weight percentage of the polyhydric alcohol 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.

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

[0092] The ratio of the weight percentage of the non-cellulose thickener to the weight percentage 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 comprise HPMC and glycerin.

[0094] In such embodiments, the ratio of the weight percentage of HPMC to the weight percentage 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] The ratio of the weight percentage of HPMC to the weight percentage of glycerin in the aerosol generating film is preferably about 1 or less.

[0096] The ratio of the weight percentage of HPMC to the weight percentage 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 comprise agar and glycerin.

[0098] In such embodiments, the ratio of the weight percentage of agar to the weight percentage 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 the weight percentage of agar to the weight percentage of glycerin in the aerosol generating film is preferably about 0.5 or less.

[0100] The ratio of the weight percentage of agar to the weight percentage of 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 comprise HPMC, agar, and glycerin.

[0102] The aerosol generating film preferably contains 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 weight percent to about 20 weight percent.

[0105] The aerosol generating film may contain an alkaloid compound, or a cannabinoid compound, or both an alkaloid compound and a cannabinoid compound. The aerosol generating film may contain one or more alkaloids. The aerosol generating film may contain one or more cannabinoids. The aerosol generating film may contain 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 natural organic compounds containing 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 an alkaloid compound may be active as a base in an acid-base reaction. Most alkaloid compounds have one or more of their nitrogen atoms as part of a cyclic system, such as a heterocyclic ring. In nature, alkaloid compounds are mainly found in plants, and are particularly 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 alkaloid compounds and synthetically produced alkaloid compounds.

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

[0108] The aerosol generating film may contain nicotine.

[0109] As used herein in the context of the present invention, the term "nicotine-containing aerosol generating film" describes an aerosol generating film that contains nicotine.

[0110] As used herein in the context of the present invention, the term "nicotine" is used to describe nicotine, nicotine base, or nicotine salts. In embodiments where the aerosol generating film contains nicotine base or nicotine salts, the amounts of nicotine recited herein are the amounts of free base nicotine or protonated nicotine, respectively.

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

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

[0113] The aerosol generating film may contain one or more cannabinoid compounds selected from the group consisting of cannabidiol (CBD), tetrahydrocannabinol (THC), tetrahydrocannabinolic acid (THCA), cannabidiolic 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 cannabinol (CBE), cannabicitran (CBT).

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

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

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

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

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

[0119] As used herein in connection with the present invention, the term "monobasic nicotine salt" is used to describe a nicotine salt of a monobasic acid.

[0120] In embodiments where 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 total content of alkaloid compound and cannabinoid compound of at least about 0.5 weight percent. More preferably, the aerosol generating film has a total content of alkaloid compound and cannabinoid compound of at least about 1 weight percent. Most preferably, the aerosol generating film has a total content of alkaloid compound and cannabinoid compound of at least about 2 weight percent.

[0121] In embodiments where 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 can have a total content of alkaloid compound and cannabinoid compound of about 10 weight percent or less.

[0122] In embodiments where 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 total content of alkaloid compound and cannabinoid compound of about 6 weight percent or less. More preferably, the aerosol generating film has a total content of alkaloid compound and cannabinoid compound of about 5 weight percent or less. Most preferably, the aerosol generating film has a total content of alkaloid compound and cannabinoid compound of about ~ about 4 weight percent or less.

[0123] In embodiments where 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 can have a total content of alkaloid compound and cannabinoid compound of about 0.5 weight percent to about 10 weight percent.

[0124] In embodiments where the aerosol generating film contains an alkaloid compound or a cannabinoid compound, or both an alkaloid compound and a cannabinoid compound, the aerosol generating film preferably has a total content of the alkaloid compound and the cannabinoid compound of from about 0.5 weight percent to about 6 weight percent. For example, the aerosol generating film can have a total content of the alkaloid compound and the cannabinoid compound of from about 0.5 weight percent to about 5 weight percent, or from about 0.5 weight percent to about 4 weight percent.

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

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

[0127] In embodiments where the aerosol generating film contains nicotine, the aerosol generating film preferably has a nicotine content of at least about 0.5 weight percent. More preferably, the aerosol generating film has a nicotine content of at least about 1 weight percent. Most preferably, the aerosol generating film has a nicotine content of at least about 2 weight percent.

[0128] In embodiments where the aerosol generating film contains nicotine, the aerosol generating film can have a nicotine content of about 10 weight percent or less.

[0129] In embodiments where the aerosol generating film contains nicotine, the aerosol generating film preferably has a nicotine content of about 6 weight percent or less. More preferably, the aerosol generating film has a nicotine content of about 5 weight percent or less. Most preferably, the aerosol generating film has a nicotine content of about ~ about 4 weight percent or less.

[0130] In embodiments where the aerosol generating film contains nicotine, the aerosol generating film can have a nicotine content of about 0.5 weight percent to about 10 weight percent.

[0131] In embodiments where the aerosol generating film contains nicotine, the aerosol generating film preferably has a nicotine content of about 0.5 weight percent to about 6 weight percent. For example, the aerosol generating film can have a nicotine content of about 0.5 weight percent to about 5 weight percent, or about 0.5 weight percent to about 4 weight percent.

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

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

[0134] The aerosol generating film can 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 an aerosol generating film that is substantially tobacco-free.

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

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

[0138] The aerosol generating film may be an aerosol generating film that is tobacco-free.

[0139] As used herein in the context of the present invention, the term "tobacco-free aerosol generating film" describes an aerosol generating film having a tobacco content of 0 weight percent.

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

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

[0142] As used herein in the context of the present invention, the term "tobacco-containing aerosol generating film" describes an aerosol generating film that contains tobacco plant material or a tobacco extract.

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

[0144] The aerosol generating film may contain an acid.

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

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

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

[0148] Including an acid is particularly preferred in embodiments where the aerosol generating film contains nicotine. In such embodiments, the presence of the acid can stabilize the dissolved species in the liquid film-forming composition that forms the aerosol generating film. Without wishing to be bound by theory, particularly when nicotine is present in the form of a nicotine salt, it is possible for the acid to interact with nicotine, and it is believed that the interaction between the acid and nicotine can reduce or substantially prevent the evaporation of nicotine during the drying of the liquid film-forming composition for forming the aerosol generating film. Thereby, the loss of nicotine during the manufacture of the aerosol generating film can be minimized. Advantageously, this can ensure a high and more precisely controlled nicotine delivery to the user.

[0149] The aerosol generating film preferably has an acid content of at least about 0.25 weight percent. More preferably, the aerosol generating film has an acid content of at least about 0.5 weight percent. Most preferably, the aerosol generating film has an acid content of at least about 1 weight percent.

[0150] The aerosol generating film preferably has an acid content of about 3.5 wt% or less. More preferably, the aerosol generating film has an acid content of about 3 wt% or less. Most preferably, the aerosol generating film has an acid content of about 2.5 wt% or less.

[0151] The aerosol generating film preferably has an acid content of from about 0.25 wt% to about 3.5 wt%. For example, the aerosol generating film can have an acid content of from about 0.25 wt% to about 3 wt%, or from about 0.25 wt% to about 2.5 wt%.

[0152] More preferably, the aerosol generating film has an acid content of from about 0.5 wt% to about 3.5 wt%. For example, the aerosol generating film can have an acid content of from about 0.5 wt% to about 3 wt%, or from about 0.5 wt% to about 2.5 wt%.

[0153] Most preferably, the aerosol generating film has an acid content of from about 1 wt% to about 3.5 wt%. For example, the aerosol generating film can have an acid content of from about 1 wt% to about 3 wt%, or from about 1 wt% to about 2.5 wt%.

[0154] The aerosol generating film can contain one or more flavoring agents. For example, the aerosol generating film can contain one or more flavoring agents selected from the group consisting of terpenes and terpenoids. For example, the aerosol generating film can contain menthol, eugenol, or eucalyptol.

[0155] The aerosol generating film can have a flavoring agent content of up to about 2 wt%.

[0156] The aerosol generating film can be formed by preparing a liquid film-forming composition containing a cellulose-based film-forming agent, a non-cellulose-based thickener, and a polyhydric alcohol, casting or extruding the liquid film-forming composition onto a support, allowing the liquid film-forming composition to stand and 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 can be configured to heat the aerosol generating film to a temperature of about 120 °C to about 350 °C to generate an inhalable aerosol.

[0159] The heater assembly is preferably configured to heat the aerosol generating film to a temperature of about 180 °C to about 250 °C to generate an inhalable aerosol.

[0160] More preferably, the heater assembly is configured to heat the aerosol generating film to a temperature of about 200 °C to about 220 °C to generate an inhalable aerosol.

[0161] The aerosol generating system preferably comprises at least about 20 milligrams of the aerosol generating film. More preferably, the aerosol generating system comprises at least about 50 milligrams of the aerosol generating film. Most preferably, the aerosol generating system comprises at least about 100 milligrams of the aerosol generating film.

[0162] The aerosol generating system can comprise up to about 300 milligrams of the aerosol generating film. For example, the aerosol generating system can comprise up to about 200 milligrams of the aerosol generating film.

[0163] The aerosol generation system may include an aerosol generation film of about 20 milligrams to about 300 milligrams. For example, the aerosol generation system may include an aerosol generation film of about 20 milligrams to about 200 milligrams.

[0164] The aerosol generation system may include an aerosol generation film of about 50 milligrams to about 300 milligrams. For example, the aerosol generation system may include an aerosol generation film of about 50 milligrams to about 200 milligrams.

[0165] The aerosol generation system may include an aerosol generation film of about 100 milligrams to about 300 milligrams. For example, the aerosol generation system may include an aerosol generation film of about 100 milligrams to about 200 milligrams.

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

[0167] The heater assembly may be configured to heat the aerosol generation 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 heating elements with flat surfaces.

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

[0171] The heater may comprise one or more electrically resistive heating elements. The heater may comprise one or more electrically resistive heating elements including one or more electrically resistive materials. Suitable electrically resistive materials include, but are not limited to, semiconductors such as doped ceramics, "conductive" ceramics (such as molybdenum disilicide), carbon, graphite, metals, alloys, and composite materials made of ceramic materials or metal materials. Such composite materials may include doped ceramics 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-containing, cobalt-containing, chromium-containing, aluminum-containing, titanium-containing, zirconium-containing, hafnium-containing, niobium-containing, molybdenum-containing, tantalum-containing, tungsten-containing, tin-containing, gallium-containing, manganese-containing, gold-containing, and iron-containing alloys, as well as nickel, iron, cobalt, stainless steel-based superalloys, Timetal (registered trademark), and iron-manganese-aluminum-based alloys. In the composite material, the electrically resistive material may optionally be embedded in, encapsulated in, or coated with a heat 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 comprise one or more inductive heating elements including an inductor and a susceptor. The inductor may generate an alternating electromagnetic field or a fluctuating electromagnetic field that induces eddy currents in the susceptor. Due to resistive losses, heat may be generated in the susceptor (Joule heating or resistive heating). When 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 ferrite material. The susceptor may include a metallic material. For example, the susceptor may include ferrite 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 where the heater assembly includes a plurality of heating elements, the heating elements may be arranged to heat different portions of the aerosol generating film. In such embodiments, the controller may be configured to sequentially activate the heating elements in response to a continuous user inhalation.

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

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

[0179] The control circuit may include a sensor configured to detect a user inhalation. The control circuit may be configured to activate the heater assembly and sequentially heat different portions of the aerosol generating film in response to a continuous user inhalation detected by the sensor.

[0180] The control circuit may include a flow sensor configured to detect a change in the air flow that occurs when the user inhales on the aerosol generating system.

[0181] The control circuit may include a pressure sensor configured to detect a change in pressure that occurs when the user inhales on the aerosol generating system.

[0182] The control circuit may include a capacitance sensor configured to detect when a user touches the aerosol generation system to their lips in order to draw in the aerosol generation system. For example, the control circuit may include a capacitance sensor disposed proximate to the mouthpiece of the aerosol generation system.

[0183] The control circuit may include a mechanism that is activated by the user and that can indicate the user's inhalation. For example, the control circuit may include a switch that can be pushed by the user to indicate the user's inhalation.

[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 battery or a 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 circuit may be configured to control the continuous supply of power from the power source to the heating assembly in response to the user's inhalation.

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

[0190] The aerosol generation film may be disposed on a support.

[0191] The aerosol generation film may be disposed on a planar support. For example, the aerosol generation film may be disposed on a substantially square, substantially rectangular, substantially circular planar support, or a substantially annular planar support.

[0192] The aerosol generating film can be disposed on an elongated support. For example, the aerosol generating film can be disposed on a continuous or discontinuous elongated support tape.

[0193] The aerosol generating film can be disposed on a tubular support. For example, the aerosol generating film can be disposed on a substantially cylindrical tubular support.

[0194] The aerosol generating film can be disposed on a support formed from any suitable material or combination of materials. For example, the aerosol generating film can be disposed on a support of paper, glass, or cardboard.

[0195] The aerosol generating film can be disposed on a thermally conductive support. For example, the aerosol generating film can be disposed on a support including metallized paper, or a support of metallized cardboard, or a support including a metal foil laminate.

[0196] In embodiments where the aerosol generating film is disposed on a support, the heating assembly can 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 the support that is not in contact with the support.

[0198] In embodiments where the aerosol generating film is disposed on a support, the heating assembly can be configured to heat the inner surface of the support. The aerosol generating film.

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

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

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

[0202] In an embodiment where the aerosol generation film is disposed on a substantially circular planar support, the drive assembly may comprise a turntable on which the substantially circular planar support is mounted.

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

[0204] The control circuit may be configured to activate the drive assembly during a continuous user inhalation.

[0205] The aerosol generation system may comprise a plurality of spaced-apart discrete portions of the aerosol generation film disposed on a support.

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

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

[0208] The spaced-apart discrete 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 circuit may be configured to activate the heater assembly to sequentially heat different separately spaced apart portions of the aerosol generating film in response to continuous user inhalation.

[0210] The control circuit may be configured to activate the heater assembly to sequentially heat different groups or subsets of a plurality of separately spaced apart portions of the aerosol generating film in response to continuous user inhalation.

[0211] The control circuit may be configured to activate the heater assembly to sequentially heat different ones of a plurality of separately spaced apart portions of the aerosol generating film in response to continuous user inhalation.

[0212] Each separately spaced apart portion of the aerosol generating film may provide an inhalable aerosol sufficient for a single puff when heated.

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

[0214] The plurality of separately spaced apart portions of the aerosol generating film may comprise two or more groups of separately spaced apart portions of the aerosol generating film that contain different amounts of aerosol generating film.

[0215] Each separately spaced apart portion of the aerosol generating film may comprise from about 2 milligrams to about 30 milligrams of aerosol generating film. For example, each separately spaced apart 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 plurality of separately spaced apart 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 aerosol-generating films of different compositions.

[0218] For example, the plurality of spaced-apart distinct portions of the aerosol-generating film may comprise a first group of spaced-apart distinct portions of an aerosol-generating film comprising a cellulose-based film-forming agent, a non-cellulose-based thickener, a polyhydric alcohol, and nicotine, and a second group of spaced-apart distinct portions of an aerosol-generating film comprising a cellulose-based film-forming agent, a non-cellulose-based thickener, a polyhydric alcohol, and a flavoring agent.

[0219] Each spaced-apart distinct portion of the aerosol-generating film may contain from about 90 micrograms to about 1200 micrograms of polyhydric alcohol. For example, each spaced-apart distinct 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 distinct 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] Each spaced-apart distinct portion of the aerosol-generating film preferably contains from about 200 micrograms to about 750 micrograms of polyhydric alcohol. For example, each spaced-apart distinct 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] Each separately disposed and distinct portion of the aerosol-generating film preferably contains from about 250 micrograms to about 600 micrograms of a polyhydric alcohol. For example, each separately disposed and distinct portion of the aerosol-generating film can contain from about 250 micrograms to about 550 micrograms of a polyhydric alcohol, from about 250 micrograms to about 500 micrograms of a polyhydric alcohol, or from about 250 micrograms to about 450 micrograms of a polyhydric alcohol.

[0222] Most preferably, each separately disposed and distinct portion of the aerosol-generating film contains from about 300 micrograms to about 450 micrograms of a polyhydric alcohol. For example, each separately disposed and distinct portion of the aerosol-generating film can contain from about 300 micrograms to about 400 micrograms of a polyhydric alcohol, or from about 300 micrograms to about 350 micrograms of a polyhydric alcohol.

[0223] In embodiments where the aerosol-generating film contains nicotine, each separately disposed and distinct portion of the aerosol-generating film can contain from about 20 micrograms to about 150 micrograms of nicotine. For example, each separately disposed and distinct portion of the aerosol-generating film can contain from about 20 micrograms to about 125 micrograms of nicotine, or from about 50 micrograms to about 125 micrograms of nicotine. For example, each separately disposed and distinct portion of the aerosol-generating film can contain from about 20 micrograms to about 100 micrograms of nicotine, or from about 50 micrograms to about 100 micrograms of nicotine. For example, each separately disposed and distinct portion of the aerosol-generating film can contain 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 can comprise from about 2 to about 40 separately disposed and distinct portions of the aerosol-generating film disposed on a support.

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

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

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

[0228] As used herein in the context of 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 capable of forming an aerosol.

[0229] As used herein in the context of 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] Advantageously, the aerosol-generating system may comprise a consumable aerosol-generating article comprising an aerosol-generating film, and a reusable aerosol-generating device comprising a power source and a control circuit.

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

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

[0233] Where applicable, the features described in connection with the aerosol generation system according to the first aspect of the present invention may be equally applicable to the aerosol generating article according to the second aspect of the present invention, and vice versa.

[0234] Although only by way of illustration, the present invention will be further described with reference to the following accompanying drawings.

Brief Description of the Drawings

[0235]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

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

[0237] The consumable aerosol generation article according to the first embodiment of the present invention includes a tubular cylindrical support 2 and a plurality of separate portions or bands extending in the major axis direction and spaced apart circumferentially of an aerosol generation film 4 disposed on the outer curved surface of the tubular cylindrical support 2. The tubular cylindrical support 2 can have, for example, a length of 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 separate bands extending in the major axis direction and spaced apart circumferentially of the aerosol generation film 4 includes a 20 mg aerosol generation film having the composition shown in Table 1. [Table 1] Table 1

[0239] The composition and amount of the aerosol generation film in each of the separate bands extending in the major axis direction and spaced apart circumferentially of the aerosol generation film 4 are the same. The aerosol generation film in each of the separate bands extending in the major axis direction and spaced apart circumferentially of the aerosol generation film 4 includes a cellulose-based film former, a non-cellulose-based thickener, and a polyhydric alcohol. The amount of the aerosol generation film in each of the separate bands extending in the major axis direction and spaced apart circumferentially of the aerosol generation film 4 is such that each of the separate bands extending in the major axis direction and spaced apart circumferentially of the aerosol generation film 4 provides an inhalable aerosol sufficient for a single smoking when heated.

[0240] The reusable aerosol generating device includes a heater assembly including a plurality of fixed elongated heating elements 6 for heating a plurality of separate bands extending in the longitudinal direction of the aerosol generating film 4 and spaced apart in the circumferential direction to generate an inhalable aerosol. The plurality of fixed elongated heating elements 6 (shown by 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 to a different one of the outer surfaces of the separate bands extending in the longitudinal direction of the aerosol generating film 4 and spaced apart in the circumferential direction. The plurality of fixed elongated heating elements 6 may be flat surface heaters or mesh heaters.

[0241] The reusable aerosol generating device further includes a power source and a control circuit (not shown).

[0242] The control circuit 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 circuit includes a flow sensor (not shown) configured to detect a change in the air flow that occurs when the user inhales on the aerosol generating system. The control circuit is configured to sequentially activate the plurality of fixed elongated heating elements 6 in response to successive user inhalations detected by the flow sensor, and to sequentially heat different ones of the separate bands extending in the longitudinal direction of the aerosol generating film 4 and spaced apart in the circumferential direction in response to successive user inhalations.

[0243] In an alternative embodiment, it will be appreciated that 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 separate bands extending in the longitudinal direction of the aerosol generating film 4 and spaced apart in the circumferential direction.

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

[0245] The aerosol generation article according to the second embodiment of the present invention includes a tubular cylindrical support 2 and a plurality of circumferentially extending and longitudinally spaced-apart separate portions or rings of an aerosol generation film 4 disposed on the outer curved surface of the tubular cylindrical support 2. The tubular cylindrical support 2 can have, for example, a length of 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 separate rings of the aerosol generation film 4 that extend circumferentially and are longitudinally spaced apart can be disposed on the outer curved surface of the tubular cylindrical support 2.

[0246] The composition and amount of the aerosol generation film in each of the circumferentially extending and longitudinally spaced-apart separate rings of the aerosol generation film 4. The aerosol generation film in each of the circumferentially extending and longitudinally spaced-apart separate rings of the aerosol generation film 4 includes a cellulose-based film former, a non-cellulose-based thickener, and a polyhydric alcohol. The amount of the aerosol generation film in each of the circumferentially extending and longitudinally spaced-apart separate rings of the aerosol generation film 4 is such that each of the circumferentially extending and longitudinally spaced-apart separate rings of the aerosol generation film 4 provides an inhalable aerosol sufficient for a single smoking when heated.

[0247] The reusable aerosol generating device comprises a heater assembly including a plurality of fixed annular heating elements 6 that extend in the circumferential direction of the aerosol generating film 4 and heat separate rings spaced apart in the major axis direction to generate inhalable aerosol. The plurality of fixed annular heating elements 6 are spaced apart in the major axis direction 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 to a different one of the outer surfaces of separate rings that extend in the circumferential direction of the aerosol generating film 4 and are spaced apart in the major axis direction. 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 source and a control circuit (not shown).

[0249] The control circuit 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 circuit comprises a flow sensor (not shown) configured to detect a change in the air flow that occurs when the user inhales on the aerosol generating system. The control circuit is configured to sequentially activate the plurality of fixed annular heating elements 6 in response to successive user inhalations detected by the flow sensor, and to sequentially heat different ones of the separate rings that extend in the circumferential direction of the aerosol generating film 4 and are spaced apart in the major axis direction in response to successive user inhalations.

[0250] In an alternative embodiment, it will be appreciated that 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 separate rings that extend in the circumferential direction of the aerosol generating film 4 and are spaced apart in the major axis direction.

[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] The consumable aerosol generating article according to the third embodiment of the present invention comprises a planar support 2 and a regular linear array of discrete strips of an aerosol generating film 4 disposed on the upper surface of the planar support 2. The discrete strips of the aerosol generating film 4 may have, for example, a width of about 2 mm to about 20 mm and, for example, a length of about 5 mm to about 50 mm. Depending on the dimensions of the planar support 2, for example, up to 40 discrete strips of the aerosol generating film 4 can 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 discrete strips of the aerosol generating film 4 are the same. The aerosol generating film in each of the discrete strips of the aerosol generating film 4 comprises a cellulose-based film former, a non-cellulose thickener, and a polyhydric alcohol. The amount of the aerosol generating film in each of the discrete strips of the aerosol generating film 4 is such that each of the discrete strips of the aerosol generating film 4 provides an inhalable aerosol sufficient for a single smoking when heated.

[0254] The reusable aerosol generating device comprises a heater assembly including a plurality of fixed elongated heating elements (not shown) for heating the regular linear array of discrete strips of the 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 below a different one of the discrete strips of the 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 source and a control circuit (not shown).

[0256] The control circuit is configured to control the supply of power from a power source to each of a plurality of fixed elongated heating elements. The control circuit includes a flow sensor (not shown) configured to detect a change in the air flow that occurs when a user inhales the aerosol generation system. In response to continuous user inhalation detected by the flow sensor, the control circuit sequentially activates the plurality of fixed elongated heating elements to sequentially heat different ones of the spaced-apart discrete strips of the aerosol generation film 4 in response to continuous user inhalation.

[0257] As shown in FIG. 3, by providing a perforation line 8 or other weak line within the planar support 2 between the spaced-apart discrete strips of the aerosol generation film 4, a user can be enabled to select a desired number of spaced-apart discrete strips of the aerosol generation film 4 for heating, and thus a desired number of smoking sessions and a desired total amount of aerosol delivery.

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

[0259] The consumable aerosol generation article according to the fourth embodiment of the present invention shown in FIG. 4 is similar to the aerosol generation article according to the third embodiment of the present invention shown in FIG. 2, but includes a regular two-dimensional array of spaced-apart discrete dots of the aerosol generation film 4 disposed on the planar support 2 instead of a regular linear array of spaced-apart discrete strips of the aerosol generation film.

[0260] As shown in FIG. 4, the spaced-apart dots of the aerosol generation film 4 may be substantially square or substantially circular. The spaced-apart dots of the aerosol generation film 4 are, for example, about 25 mm 2 ~ about 400 mm 2It may have a surface area and, for example, a length of about 5 mm to about 50 mm. Depending on the dimensions of the planar support 2, for example, up to 40 separate dots of the aerosol-generating film 4 spaced apart 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 separate dots of the aerosol-generating film 4 spaced apart 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 below a different one of the separate dots of the aerosol-generating film 4 spaced apart. 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 a control circuit (not shown).

[0263] The control circuit is configured to control the supply of power from the power supply to each of the plurality of fixed elongated heating elements. The control circuit comprises a flow sensor (not shown) configured to detect a change in the air flow that occurs when the user inhales on the aerosol-generating system. The control circuit is configured to sequentially activate the plurality of fixed heating elements in response to successive user inhalations detected by the flow sensor, and to sequentially heat different ones of the separate dots of the aerosol-generating film 4 spaced apart in response to successive user inhalations.

[0264] As shown in FIG. 4, by providing a perforation line 8 or other weak line within the planar support 2 between the separate dots of the aerosol-generating film 4 spaced apart, the user can be enabled to select a desired number of the separate dots of the aerosol-generating film 4 for heating, and thus a desired number of inhalations and a desired total amount of aerosol delivery.

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

[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 FIG. 5 is the same as the aerosol generating article according to the third embodiment of the present invention shown in FIG. 3, and comprises a planar support 2 and a regular linear array of discrete strips of the 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 elongate heating elements 6 for heating a regular linear array of discrete strips of the aerosol generating film 4 to generate an inhalable aerosol. The heating assembly is hinged to the planar support 2. By pivoting the heating assembly, the elongate 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 elongate heating elements is positioned directly above a different one of the discrete strips of the aerosol generating film 4 that are spaced apart. The plurality of elongate heating elements may be flat surface heaters or mesh heaters.

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

[0270] The control circuit is configured to control the supply of power from the power source to each of a plurality of fixed elongated heating elements. The control circuit includes a flow sensor 10 configured to detect a change in the air flow that occurs when the user inhales on the aerosol generation system. The control circuit is configured to sequentially activate the plurality of elongated heating elements in response to continuous user inhalation and to sequentially heat different ones of the spaced-apart discrete segments of the aerosol generation film 4 in response to continuous user inhalation.

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

[0272] The consumable aerosol generating article according to the sixth embodiment of the present invention includes a continuous elongated support tape 2 and a plurality of axially spaced-apart discrete portions of an aerosol generation 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 can have an outer diameter of, for example, about 20 mm to about 80 mm. The continuous elongated support tape 2 can 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 axially spaced-apart discrete portions of the aerosol generation film 4 can 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 separate portions spaced apart in the major axis direction of the aerosol generating film 4 are the same. The aerosol generating film in each of the separate portions spaced apart in the major axis direction of the aerosol generating film 4 contains a cellulose-based film former, a non-cellulose thickener, and a polyhydric alcohol. The amount of the aerosol generating film in each of the separate portions spaced apart in the major axis direction of the aerosol generating film 4 is such that each of the separate portions spaced apart in the major axis direction of the aerosol generating film 4 provides an inhalable aerosol sufficient for a single smoking when heated.

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

[0275] The reusable aerosol generating device further includes a power source, a control circuit, 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 elongated support tape 2 relative to the heating element 6.

[0277] The control circuit includes a flow sensor (not shown) configured to detect changes in the air flow that occur when the user inhales on the aerosol generation system. The control circuit is configured to control the supply of power from the power source to the heating element 6 in response to the user's inhalation detected by the flow sensor. The control circuit is configured to activate the drive assembly during continuous user inhalation to move the continuous elongated support tape 2 relative to the heating element 6. By moving the continuous elongated support tape 2 relative to the heating element 6 during continuous user inhalation, the control circuit is configured to activate the heating element 6 in response to continuous user inhalation and sequentially heat spaced-apart portions of the aerosol generation film 4 disposed on the outer surface of the continuous elongated support tape 2 in different major axis directions.

[0278] In an alternative embodiment, it will be appreciated that the aerosol generating article may comprise a continuous layer of the aerosol generation film disposed on the outer surface of the elongated support tape 2 rather than a plurality of separately spaced-apart portions in the major axis direction of the aerosol generation film 4.

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

[0280] In an alternative embodiment, it will also be appreciated that the aerosol generation film may be disposed on the outer surface of a discontinuous elongated support tape.

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

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

[0283] The consumable aerosol generation article includes a substantially square support 2 in a plane and an aerosol generation film 4 disposed on the upper surface of the substantially square support 2 in the plane. The substantially square support 2 in the plane can have a length and width of, for example, about 5 mm to about 80 mm.

[0284] The aerosol generation film 4 contains a cellulose-based film former, a non-cellulose-based thickener, and a polyhydric alcohol.

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

[0286] The reusable aerosol generation device further includes a power source, a control circuit, and a drive assembly (not shown).

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

[0288] The control circuit includes a flow sensor (not shown) configured to detect a change in the air flow that occurs when the user inhales the aerosol generation system. The control circuit is configured to control the supply of power from the power source to the planar rectangular heating element 6 in response to the user's inhalation detected by the flow sensor. The control circuit is configured to activate the drive assembly during continuous user inhalation to move the planar rectangular heating element 6 relative to the substantially square support 2 in the plane. By moving the planar rectangular heating element 6 relative to the substantially square support 2 in the plane during continuous user inhalation, the control circuit is configured to activate the planar rectangular heating element 6 in response to continuous user inhalation and sequentially heat different portions of the aerosol generation film 4 disposed on the upper surface of the substantially square support 2 in the plane.

[0289] In an alternative embodiment, it will be understood that the planar support 2 may have a different shape. For example, the planar support 2 may be substantially rectangular or substantially circular.

[0290] In an alternative embodiment, it will also be understood that the control circuit and the drive assembly may be configured to move the planar support 2 relative to the planar heating element 6 during continuous user inhalation.

[0291] The aerosol generation system according to the eighth embodiment of the present invention shown in FIG. 8 includes a consumable aerosol generation article and a reusable aerosol generation device.

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

[0293] The reusable aerosol generator includes a heater assembly including a flat trapezoidal heating element 6 for heating the aerosol generating film 4 to generate an inhalable aerosol. The flat 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 flat annular support 2. The flat trapezoidal heating element 6 may be a flat surface heater or a mesh heater.

[0294] The reusable aerosol generator further includes a power source, a control circuit, and a drive assembly (not shown).

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

[0296] The control circuit includes a flow sensor (not shown) configured to detect a change in the air flow that occurs when the user inhales the aerosol generation system. The control circuit is configured to control the supply of power from the power source to the flat trapezoidal heating element 6 in response to the user's inhalation detected by the flow sensor. The control circuit is configured to activate the drive assembly during continuous user inhalation to rotate the flat annular support 2 relative to the flat trapezoidal heating element 6 during continuous user inhalation. By rotating the flat annular support 2 relative to the flat trapezoidal heating element 6 during continuous user inhalation, the control circuit is configured to activate the flat trapezoidal heating element 6 in response to continuous user inhalation and sequentially heat different portions of the aerosol generating film 4 disposed on the upper surface of the flat annular support 2.

[0297] In an alternative embodiment, it will be understood that the control circuit and the drive assembly may be configured to rotate the flat trapezoidal heating element 6 relative to the annular support 2 during continuous user inhalation.

[0298] 1. An aerosol generation system, An aerosol-generating film comprising a cellulose-based film-forming agent, a non-cellulose-based thickener, and a polyhydric alcohol, and a heater assembly for heating the aerosol-generating film to generate an inhalable aerosol, and a power source, and a control circuit configured to control the supply of power from the power source to the heater assembly in response to a user's inhalation, comprising: The cellulose-based film-forming agent is a cellulose ether, and the control circuit is configured to activate the heater assembly in response to continuous user inhalation to sequentially heat different portions of the aerosol-generating film. An aerosol-generating system. 2. The aerosol-generating system according to 1, wherein the heater assembly includes 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. The heating element is arranged to heat different portions of the aerosol-generating film, and the controller is configured to sequentially activate the heating element in response to continuous user inhalation. The aerosol-generating system according to 2. 4. The aerosol-generating system according to any one of 1 to 3, further comprising a drive assembly configured to move the aerosol-generating film relative to the heater assembly. 5. The aerosol-generating system according to any one of 1 to 4, further comprising a drive assembly configured to move the heater assembly relative to the aerosol-generating film. 6. The aerosol-generating system according to 4 or 5, wherein the control circuit is configured to activate the drive assembly during continuous user inhalation. 7. The aerosol-generating system according to any one of 1 to 6, comprising a plurality of spaced-apart separate portions of the aerosol-generating film disposed on a support. 8. The aerosol generating system according to 7, wherein the control circuit is configured to activate the heater assembly in response to continuous user inhalation to sequentially heat different, spaced-apart, separate portions of the aerosol generating film. 9. The aerosol generating system according to 8, wherein the control circuit is configured to activate the heater assembly in response to continuous user inhalation to sequentially heat a different one of the plurality of spaced-apart, separate portions of the aerosol generating film. 10. An aerosol generating article, a support, and a plurality of spaced-apart, separate portions of an aerosol generating film disposed on the support, wherein each of the spaced-apart, separate portions of the aerosol generating film comprises a cellulose-based film former, a non-cellulose-based thickener, and a polyhydric alcohol, and the cellulose-based film former is a cellulose ether. 11. The aerosol generating article according to 10, wherein the plurality of spaced-apart, separate portions of the aerosol generating film comprises a regular linear array of spaced-apart, separate strips or bands of the aerosol generating film. 12. The aerosol generating article according to 10 or 11, wherein the plurality of spaced-apart, separate portions of the aerosol generating film comprises a regular two-dimensional array of spaced-apart, separate dots or spots of the aerosol generating film. 13. The aerosol generating article according to any one of 10 to 12, wherein each of the spaced-apart, separate portions of the aerosol generating film provides an inhalable aerosol sufficient for a single puff when heated. 14. The aerosol generating article according to any one of 10 to 13, wherein each of the spaced-apart, separate portions of the aerosol generating film has a polyhydric alcohol content of at least about 40 weight percent. 15. The aerosol generating article according to any one of 10 to 14, wherein each of the spaced-apart, separate portions of the aerosol generating film has a nicotine content of at least about 0.5 weight percent.

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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