KR20240027610A - Flat tobacco articles comprising at least two layers and aerosol generating devices having such articles - Google Patents

Abstract

A flat tobacco article configured to receive at least a portion of a double-sided flat heater and an aerosol-generating assembly comprising such article. The present invention relates to a flat tobacco article (12) comprising a first heating portion (81) and a second heating portion (82) designed to be arranged parallel to the first heating portion (81); The first heating portion 81 comprises a substrate layer 91 comprising a tobacco substrate; The second heating portion 82 includes a retainer layer 92 comprising a vapor former and an agent retainer retaining the vapor former; The flat tobacco article (12) has at least a portion of the double-sided flat heater (47) of the aerosol generating device between the heating portions (81, 82) for simultaneously heating each of the first and second heating portions (81, 82). It is designed to accommodate. The substrate layer (91; 94A) and the retainer layer (92; 93C) of the first heating part (81) and the second heating part (82) are arranged to be heated directly by the corresponding side of the flat heater (47), respectively. do.

Description

Flat tobacco articles comprising at least two layers and aerosol generating devices having such articles

The present invention relates to a flat-shaped tobacco article configured to receive at least a portion of a double-sided flat heater.

The invention also relates to an aerosol-generating assembly comprising such articles and an aerosol-generating device configured to operate with the articles. Tobacco articles include, for example, a solid substrate that can form an aerosol when heated. Accordingly, aerosol generating devices, also known as non-combustible heated devices, configured for operation with an article are configured to heat the substrate by conduction, convection and/or radiation instead of burning it to generate an aerosol for inhalation.

The prevalence and use of reduced risk or modified risk devices (also known as vaporizers) to assist habitual smokers who wish to quit smoking conventional tobacco products such as cigarettes, cigars, cigarillos, and rolled tobacco. As an organization, it has grown rapidly over the past few years. A variety of devices and systems are available for heating or warming vaporizable materials, as opposed to burning tobacco in conventional tobacco products.

Commonly available reduced or modified risk devices are heated base aerosol generating devices or non-combustible heated devices. Devices of this type produce an aerosol or vapor by heating an aerosol substrate contained in a tobacco article usable with this type of device. The aerosol substrate generally comprises moist leaf tobacco or other suitable vaporizable material at temperatures generally ranging from 150°C to 350°C. Heating the aerosol substrate with or without burning releases an aerosol that contains the ingredients sought by the user but does not contain the toxic and carcinogenic by-products that occur when burning and burning. Additionally, aerosols produced by heating tobacco or other vaporizable materials generally do not contain burnt or bitter tastes resulting from burning and combustion, which can be unpleasant to users, and thus these substrates are more palatable to users. It does not require sugar and other additives commonly added to these materials to produce smoke and/or vapor.

It is therefore clear that aerosol generation from substrates throughout an entire vaping session poses difficult challenges. For example, in some cases, an aerosol substrate may produce vapor at the beginning of a session and deplete at the end. Accordingly, the amount of vapor generated during a session can vary significantly, which can lead to an undesirable user experience. Additionally, in some aerosol generating devices, heat transfer from the heater to the substrate is not optimal. In this case, heat is wasted or a large amount of insulating material is used to prevent heat leakage.

The present invention aims to propose a tobacco article for use with a non-combustible heated device that can provide a better user experience during the entire vaping session. In particular, the present invention aims to improve and sustain the aerosol production during the entire vaping session guaranteed by the tobacco article when the article is used in conjunction with a non-combustible heated device. Additionally, the invention ensures optimal heat transfer from the heater to the tobacco article to avoid wasting heat or using large amounts of insulation.

For this purpose, the invention relates to a flat tobacco article comprising a first heating portion and a second heating portion designed to be arranged parallel to the first heating portion;

The first heating portion includes a substrate layer comprising a tobacco substrate;

The second heating portion includes a retainer layer including a vapor former and an agent retainer that retains the vapor former;

The flat tobacco article is configured to receive at least a portion of the double-sided flat heater of the aerosol generating device between each heating portion for simultaneously heating the first and second heating portions.

Due to this feature, the double-sided flat heater is completely surrounded by the tobacco article such that heat is substantially completely transferred to the tobacco article without wasting heat or using large amounts of insulation. Additionally, the invention proposes connecting opposing sides of heater heating parts, which may have different compositions. Therefore, it is possible to adjust the response time of these heating parts to obtain the desired effect during steam generation. In particular, “response time” is understood as the time required for the corresponding layer or heated part to provide the desired effect when heated. The desired effect may be vapor generation. Different response times imply different temperatures of the corresponding layer of each heating portion, at least at some moments of the vaping session. This layer can be used to store at least a portion of the vapor former separately from the tobacco substrate. By adjusting the properties of these layers of each heating part, their composition and their respective placement, it is possible to improve vapor production at different moments of the vaping session. For example, it is possible to enhance vapor production during the initial phase of a vaping session (i.e. a warm-up phase) or, in contrast, at the end of a vaping session.

According to the invention, the tobacco substrate may provide shredded and/or compressed tobacco leaves. The substrate layer includes this tobacco substrate along with a binding material. The substrate layer can thus provide a dough that is flattened and cut in an appropriate manner. In some embodiments, the substrate layer may be free of vapor formers. In some other embodiments, the substrate layer includes one or several vapor formers.

According to some embodiments, the agent retainer is non-woven; cotton fabric; and paper.

Due to this feature, a suitable agent retainer can be selected that is configured to hold the vapor former and heat the vapor former to a suitable temperature at a suitable moment of the vaping session.

According to some embodiments, the vapor former is:

- polyols such as sorbitol, glycerol;

- glycols, such as propylene glycol or triethylene glycol;

- non-polyols, such as monohydric alcohols

- acids, such as lactic acid, glycerol derivatives;

- Esters, such as triacetin, triethylene glycol diacetate, triethyl citrate, glycerin or vegetable glycerin;

- is selected from the group consisting of any mixture of the previously mentioned components.

Due to this feature, a suitable vapor former can be selected that is configured to release vapor when heated to a suitable temperature at suitable moments of a vaping session.

According to some embodiments, the first heating portion further includes at least one retainer layer disposed parallel to the substrate layer.

Due to this feature, a retainer layer of the first heating section can be used. This retainer layer may, for example, have a response time different from that of the retainer layer used in the second heating section. Accordingly, aerosol production during the entire vaping session can be adjusted to achieve the desired effect.

According to some embodiments, the retainer layer of the first heating portion is arranged to be heated directly by a corresponding side of the flat heater.

Due to this feature, the retainer layer of the first heating section can be heated to a higher temperature than the substrate layer. Therefore, in some cases it is possible to ensure a higher heating temperature of the retainer layer without burning the tobacco substrate contained in the substrate layer.

According to some embodiments, the retainer layer of the first heating portion is arranged to be heated through the corresponding substrate layer.

According to some embodiments, the second heating portion includes two retainer layers, and the substrate layer is disposed between the two retainer layers.

According to some embodiments, the two retainer layers of the second heating portion have different thicknesses and/or comprise different vapor formers and/or comprise different agent retainers.

Due to this feature, it is possible to use two retainer layers with different response times in the same heating section.

According to some embodiments, the second heating portion further comprises a substrate layer disposed parallel to the retainer layer of the heating portion.

According to some embodiments, the substrate layer of the second heating portion is arranged to be heated directly by the corresponding side of the flat heater.

Due to this feature, it is also possible to use the substrate layer in the second heating portion to improve the user experience during vaping sessions. Additionally, different substrate layers may contain different tobacco substrates (tobacco properties, blends, flavors, etc.).

According to some embodiments, the second heating portion has the same layer composition as the first heating portion.

Due to this feature, the tobacco article can have a symmetrical structure. Therefore, a flat heater can be accommodated in the center of this structure and ensure homogeneous heat transfer across all layers.

According to some embodiments, the second heating portion has a different layer composition than the layer composition of the first heating portion.

According to some embodiments, each heating portion is wrapped in a separate wrapper.

Due to this feature, the flat heater can be easily inserted into and extracted from the tobacco article.

According to some embodiments, it comprises attachment means for attaching the heating portions or their extensions to each other.

Due to this feature, the tobacco article can provide a unique piece that can be easily manipulated by the user.

According to some embodiments, each heating portion is extended by a filter portion, preferably both heating portions share the same portion of the mouthpiece portion.

Due to this feature, the aerosols generated in each heating part can be filtered and advantageously cooled before reaching the user's mouth and/or lips.

According to some embodiments, the or at least one substrate layer and/or the or at least one retainer layer are arranged to be heated directly by a corresponding side of the flat heater.

Due to this feature, heat transfer can be further improved.

The invention also relates to an aerosol generating assembly, comprising:

- An aerosol generating device comprising a double-sided flat heater;

- Includes flat tobacco articles intended to be heated by a heater to generate an aerosol, as defined above.

The invention and its advantages will be better understood by reading the following description, which is provided by way of non-limiting example only and made with reference to the accompanying drawings.
- Figure 1 comprising an aerosol generating device and a flat tobacco article. A perspective view of an aerosol generating assembly according to the present invention;
- Figure 2 is a perspective view of the flat tobacco article of Figure 1;
- Figure 3 is a perspective view of a heating chamber accommodating a flat tobacco article of the aerosol generating device of Figure 1;
- Figure 4 is a cross-sectional view along plane IV of Figure 2;
- Figure 5 is a cross-sectional view of the heater part of a flat tobacco article according to a different example from that of Figure 4;

Before describing the invention, it is understood that the invention is not limited to the structural details presented in the following description. It will be apparent to those skilled in the art that the invention may be embodied in other embodiments and practiced or carried out in various ways.

As used herein, the term “ aerosol generating device ” or “ device ” may include a vaping device that delivers aerosols to a user, including aerosols for vaping, by means of a heater element, as described in more detail below. there is. The device may be portable. “Portable” can indicate that the user can hold and use the device. The device may be configured to generate variable amounts of aerosol (as opposed to metered doses of aerosol), for example, by activating a heater element for a variable amount of time, which may be controlled by a trigger. Triggers such as a vaping button and/or inhalation sensor may be activated by the user. The inhalation sensor is sensitive to the intensity of the inhalation as well as the duration of the inhalation, allowing variable amounts of vapor to be provided (to mimic the effect of smoking a conventional combustible smoking article such as a cigarette, cigar or pipe, etc.). The device may include a heater and/or a thermostatic control that drives the temperature of the heated aerosol generating material (aerosol precursor) to a specific target temperature and then maintains the temperature at a target temperature that allows efficient generation of aerosol.

As used herein, the term “ aerosol ” refers to solid particles; liquid droplet; One or more of the gases may contain suspended solids of vaporizable substances. The suspended matter may be in a gas containing air. Aerosols herein generally may represent/comprise vapors. Aerosols may contain one or more components of vaporizable substances.

As used herein, the term “ vaporizable material ” or “ precursor ” may refer to a material suitable for smoking, which may include, for example, nicotine or tobacco and vapor formers. Tobacco can take the form of various materials such as shredded tobacco, granulated tobacco, tobacco leaves and/or regenerated tobacco. The vaporizable material may also include at least one of a gelling agent, binder, stabilizer, and wetting agent.

As used herein, the term " vapor former " or " aerosol forming agent/aerosol former " refers to polyols such as sorbitol, glycerol, and glycols such as propylene glycol or triethylene glycol; Non-polyols such as monohydric alcohols, acids such as lactic acid, glycerol derivatives, esters such as triacetin, triethylene glycol diacetate, triethyl citrate, glycerin or vegetable glycerin. In some embodiments, the aerosol generating agent may be glycerol, propylene glycol, or a mixture of glycerol and propylene glycol. The vapor former may also represent any mixture of the previously mentioned components.

1 shows an aerosol generating assembly 10 comprising an aerosol generating device 11 and a flat tobacco article 12 inserted into the aerosol generating device 11 . This flat tobacco article 12 is shown in more detail in Figure 2.

2, a flat tobacco article 12, hereinafter referred to as a tobacco article 12, extends, for example, along a longitudinal axis (X) and has external dimensions (L×W×D). It is a flat rectangular parallelepiped. In a typical example, the length (L) of the article along the longitudinal axis (X) is substantially 33 mm, and the width (W) and depth (D) of the substrate are substantially 12 mm and 3.5 mm, respectively. According to different examples, the dimensions of the flat tobacco article of the invention are not limited to a particular range, although the values (L, W and D) may be selected within the range of +/- 40%. The depth D of the tobacco article 12 is formed by a pair of parallel walls 13A, 13B, hereinafter referred to as article transverse walls 13A, 13B, and the width W of the tobacco article 12 is formed by a pair of parallel walls 14A, 14B, hereinafter referred to as article contact walls 14A, 14B. The article walls 13A, 13B, 14A, 14B form two parallel pairs of the outer surfaces of the tobacco article 12. According to another example of the present invention, the tobacco article 12 may have any other suitable flat shape and/or external dimensions. In the general case, a flat shape of a tobacco article is understood as a shape with a depth that is, for example, at least 5 times, advantageously at least 10 times and even more advantageously at least 15 times smaller than the longitudinal and/or transverse dimensions respectively. It has to be. Additionally, as described in more detail below, the depth D of at least a portion of the tobacco article 12 may vary when the tobacco article is received in the aerosol generating device 11 .

The tobacco article 12 includes a heater portion 15 and a mouthpiece portion 16 disposed along the longitudinal axis X. In some embodiments, tobacco article 12 may include only heater portion 15. Heater portion 15 may, for example, be slightly longer than mouthpiece portion 16. For example, the length L2 of the heater portion 15 along the longitudinal axis X may be substantially 18 mm and the length L1 of the mouthpiece portion 16 along the longitudinal axis It may be substantially 15 mm. Heater portion 15 defines abutment end 18 of article 12 and mouthpiece portion 16 defines mouth end 20 of article 12. The heater portion 15 and mouthpiece portion 16 may be secured to each other by a unique wrapper extending around the longitudinal axis X or using a different wrapper as described in more detail below. You can. The or each wrapper may comprise, for example, paper and/or non-woven fabric and/or aluminum. The or each wrapper may be porous or air impermeable. The or each wrapper defines a plurality of airflow channels extending within the article 12 between the rest end 18 and the mouth end 20.

The heater portion 15 is intended to be heated by a heater and includes at least one substrate layer and at least one retainer layer. This layer will be described in more detail with reference to the cross-sectional views of the tobacco article 12 shown in Figures 4 and 5, according to different examples of the invention.

According to the example of FIG. 1 , the mouthpiece portion 16 is intended to be received inside the mouthpiece of the aerosol generating device 11 . According to another embodiment of the invention, the mouthpiece portion 16 self-forms a mouthpiece intended to contact the user's mouth and/or lips. The mouthpiece portion 16 includes a core 17 that acts, for example, as a filter. Core 17 may be, for example, foam or packed strands or fibers. The core 17 may be formed into a stable shape through an extrusion and/or rolling process. The article may be shaped to provide one or more airflow channels. In the specific example of Figure 2, the mouthpiece portion 16 has a plurality of vents 22 disposed along two axes perpendicular to the longitudinal axis X, for example, along the entire perimeter of the mouthpiece portion 16. ) is defined. That is, according to this example, the vent 22 is disposed on each of the article transverse walls 13A, 13B and the article contact walls 14A, 14B. According to another example, the vents 22 are disposed only on the article-contacting walls 14A, 14B or preferably only on one of the article-contacting walls 14A, 14B. In both examples, the vents 22 may be aligned perpendicular to the longitudinal axis The vent 22 allows fresh air entering the interior of the tobacco article 12 to achieve a specific vaping/tasting effect.

Referring again to FIG. 1 , aerosol generating device 11 includes a device body 30 defining at least one side wall 40 . The device body 30 includes a mouthpiece 32 and a housing 34 arranged sequentially along the axis Y shown in FIG. 1 . According to different examples of the invention, mouthpiece 32 and housing 34 may form two different pieces or one single piece. In particular, in the case of two different pieces, the mouthpiece 32 is designed to be fixed to or received in an insertion opening formed in one of the ends of the housing 34.

In each cross-section, the housing 34 may form a substantially rectangular shape with rounded edges, for example. In this case, the housing 34 together with the mouthpiece 32 forms at least four side walls 40 . According to another example, the housing 34 may have a round cross-sectional shape. In this case, this may form only one side wall 40 together with the mouthpiece 32 . Housing 34 may be formed of a single piece or multiple assembled pieces of any suitable material, such as aluminum or plastic. In some embodiments, the material of housing 34 may be a thermally conductive material. In some other embodiments, this may be a thermal insulating material. In some embodiments, housing 34 may define one or more openings suitable for placing control and/or visual elements on corresponding portions of device sidewall 40. For example, these elements may include control buttons, touch panels, screens, LEDs, etc. In particular, in the example of FIG. 1 , the housing 34 forms a slot opening 42 that receives, for example, at least an LED indicating the ON state of the device 11 . This may also indicate, for example, a low battery condition, an error condition, etc.

In some examples, housing 34 and/or mouthpiece 32 may define an air inlet 43 in fluid communication with an internal airflow path of device 11. This air inlet 43 may be formed, for example, in the side wall 40, for example in the transition area between the mouthpiece 32 and the housing 34, as shown in Figure 1. According to another example, the air inlet may be formed in the bottom wall of the housing 34, opposite the insertion opening of the housing 34.

Mouthpiece 32 defines an air outlet 44 in fluid communication with the internal airflow path of device 11. In particular, the air outlet 44 is configured to deliver the aerosol formed inside the device 11 to the user. In some examples, air outlet 44 may also be used to load tobacco articles 12 into the interior of device 11 . In some other examples, tobacco article 12 may be loaded inside device 11 when mouthpiece 32 is separated from housing 34.

Housing 34 delimits the internal space of device 11 to accommodate various elements designed to perform various functions of device 11. This internal space contains, for example, a battery to power the device 11, a control module to control the operation of the device 11, a heating chamber 45 to accommodate the tobacco article 12 and a tobacco It can accommodate a heater 47 for heating the heater portion 15 of the article 12. Of these elements, only the heating chamber 45 and heater 47 will be described in more detail with reference to FIGS. 3 and 4 .

3, heating chamber 45 forms a cup-shaped heating chamber extending along axis Y between proximal end 70 and distal end 71. The heating chamber 45 is designed to accommodate the heater portion 15 of the tobacco article 12. For this purpose, the heating chamber 45 defines substantially the same cross-sectional shape as the tobacco article 12 . In particular, in the example of Figure 3, heating chamber 45 defines a rectangular cross-sectional shape with two parallel chamber transverse walls 73A, 73B and two parallel chamber contact walls 74A, 74B. Heating chamber 45 also defines a distal wall 75 disposed perpendicular to axis Y. In particular, distal wall 75 is adjacent each of walls 73A, 73B, 74A, and 74B.

The heating chamber 45 is configured to receive at least a heater portion 15 of a tobacco article 12 such that the longitudinal axis Chamber transverse walls 73A, 73B face and article contact walls 14A, 14B face respective chamber contact walls 74A, 74B.

According to a different example of the invention, the distal end 71 of the heating chamber 45 may be sealed or may define at least one opening. In the first case, the proximal end 70 of the chamber 45 may define a unique opening of the chamber 45 configured to receive the tobacco article 12 with a gap. In particular, in this case, an airflow channel may be formed between the article 12 and each pair of transverse walls 13A, 73A and 13B, 73B of the chamber 45, while the corresponding contact walls 14A , 74A and 14B, 74B) may be in contact with each other. As shown in Figure 3, during use of the device 11 in this case, the air flow path is from the air inlet 43 through the air flow channels formed between the corresponding pairs of transverse walls and then into the heating chamber ( After a “U” turn in the interior of 45), it can extend through the tobacco article 12 to the air outlet 44. In the second case, all walls of the tobacco article 12 may be in contact with the corresponding walls of the heating chamber 45 . In the second case, during use of the device 11, the airflow path is from the air inlet 43 through an opening formed in the distal end 71 and then through the tobacco article 12 to the air outlet 44. It may be extended until. According to another example, the heating chamber 45 may form other openings in the transverse walls or contact walls, for example, to form an airflow path through the tobacco article 12.

As shown in FIG. 4 , the heater 47 is disposed within the heating chamber 45 and extends substantially the entire length of the other chamber walls 73A, 73B, 74A, 74B from the distal wall 75, for example. extends along. According to one embodiment of the invention, heater 47 extends from the center of distal wall 75. According to another embodiment, the heater 47 is disposed between the center of the distal wall 75 and one of the chamber transverse walls 73A, 73B. According to yet another embodiment that can be combined with the previous embodiment, the heater 47 is arranged between the center of the distal wall 75 and one of the chamber contact walls 74A, 74B.

According to the present invention, the heater 47 is a double-sided flat heater configured to penetrate the interior of the heater portion 15 of the tobacco article 12 when the article 12 is inserted into the heating chamber 45. In particular, the heater 47 defines two opposing sides configured to transfer heat to corresponding portions of the tobacco article 12. For this purpose, the heater 47 may comprise, for example, a unique heating element, such as a heating blade. The heating element is connected to a control module of the device 11 and is configured to be operated according to one or several heating profiles by means of this control module. According to another embodiment, the heater 47 includes a flat support on each side that receives a heating element. In this case, each heating element may consist of a membrane, for example a polyimide membrane. Additionally, in some embodiments, both heating elements can be operated by the control module according to the same heating profile. According to another embodiment, the heating elements are individually actuated by a control module, for example according to different heating profiles. This heating profile may be selected, for example, depending on the portion of the tobacco article in contact with the corresponding side of heater 47 and/or depending on the stage of the vaping session (pre-heating, heating, etc.).

In some embodiments, different sides of heater 47 may be covered by the same coating or different coatings. If the coatings are different, the coatings can be selected in this respect to ensure different heat transfer properties, for example to obtain different heating temperatures, at least at some stages of the vaping session. This coating may be used, for example, when heater 47 includes a unique heating element.

Figure 4 shows a cross-sectional view of the tobacco article 12 when the tobacco article is partially inserted into the interior of the heating chamber 45. According to this example in Figure 4, the heater portion 15 of the tobacco article 12 includes a first heating portion 81 and a second heating portion 82 intended to contact different sides of the flat heater 47. do. That is, the heater portion 15 of the tobacco article 12 is configured to receive the heater 47 between the heating portions 81 and 82. In some embodiments, each heating portion 81, 82 is configured to compress at least slightly when heater 47 is inserted between them. In this case, when not compressed, the depth D of the tobacco article 12 may substantially correspond to the distance between the chamber contact walls 74A and 74B. Additionally, the heating portions 81 and 82 may have the same thickness or different thicknesses. In the first case, the heater 47 is advantageously arranged centrally between the chamber contact walls 74A, 74B and in the second case the heater 47 can be arranged offset from this centre. Additionally, in the second case, the tobacco article 12 may define a unique insertion orientation. This insertion orientation may, for example, appear on the outer surface of the article 12 or may be defined by the particular shape of the article 12 and/or the heating chamber 45 and thus allow the tobacco article 12 to be disposed according to different orientations. ) prevents insertion.

Each heating portion 81, 82 may be wrapped in a corresponding wrapper. Additionally, the same wrapper may be used to wrap a corresponding portion of the mouthpiece portion 16 of the tobacco article 12. Accordingly, in the example of Figure 4, the first wrapper 83 is a first heating portion 81 of the heater portion 15 and a mouthpiece extending continuously from the first heating portion 81 to the mouthpiece portion 16. It may be used to wrap portions of portion 16. Similarly, the second wrapper 84 is positioned on the second heating portion 82 of the heater portion 15 and on the mouthpiece portion 16 extending the second heating portion 82 continuously into the mouthpiece portion 16. Can be used to wrap parts. Thus in this example, mouthpiece portion 16 is split into two distinct portions wrapped in different wrappers 81 and 82. Additionally, in this case, these parts of the mouthpiece portion 16 may be attached thereto using suitable attachment means 85, such as glue, clips, wire, etc. In a variant, only the first and second heating portions 81, 82 are wrapped in different wrappers. In this case, these heating portions 81, 82 may share the same undivided portion of the mouthpiece portion 16. According to yet another variant, the tobacco article 12 has only an outer wrapper and the heating portions 81, 82 can be divided by their layers or by any other suitable means.

According to the example in FIG. 4 , the first heating portion 81 comprises an intrinsic layer, which is the substrate layer 91 . In particular, the substrate layer 91 comprises a tobacco substrate, for example shredded tobacco, granulated tobacco, tobacco leaves and/or regenerated tobacco. According to some examples, substrate layer 91 may further include a vapor former incorporated into the tobacco substrate.

In some examples, second heating portion 82 also includes an intrinsic layer. In contrast to the first heating section, the intrinsic layer of the second heating section 82 is a retainer layer 92 . This retainer layer 92 comprises an agent retainer impregnated with a vapor forming agent. The agonist retainer is for example selected from the group comprising:

- Non-woven;

- cotton fabric; and

- paper.

The agent retainer may be impregnated with a vapor forming agent in liquid or gaseous form using any suitable fabrication process. For example, this can be done while forming retainer layer 92. After the vapor former is injected, the agent retainer stores the vapor former, for example in the form of droplets, between different segments of this internal structure without substantially altering its internal structure.

Advantageously, the retainer layer 92 consists of the agent retainer impregnated with the vapor forming agent. That is, in this case the retainer layer 92 comprises only the above elements and in particular does not comprise any tobacco or nicotine containing substrate.

Advantageously, if the substrate layer 91 also comprises a vapor former, this vapor former is, based on the response time of the respective layers 91, 92, vapor-forming contained in the retainer layer 92. It may be selected to be different from or substantially the same as the first.

According to the example of Figure 4, each of layers 91, 92 is intended to be heated directly by heater 47. In particular, as used herein, a layer of tobacco article 12 is said to be heated directly by heater 47 when there is no other layer of tobacco article 12 between this layer and the heating element 47. It is considered. However, other elements, such as wrappers 83, 84 or coatings of the heating chamber 45, may be interposed between this layer and the heater 47.

Figure 5 shows an example of a heater section 15 with different layer arrangements inside each heating section 81, 82.

In particular, in this example of FIG. 5, second heating portion 82 includes two retainer layers 93A, 93C and one substrate layer 93B. Substrate layer 93B is similar to substrate layer 91 described above and may be disposed between retainer layers 93A and 93C, for example. Each of retainer layers 93A, 93C may be similar to retainer layer 92 described above. Retainer layers 93A, 93C may include the same vapor former and/or agent retainers or different vapor former and/or agent retainers. Additionally, retainer layers 93A, 93C may have the same thickness or different thicknesses. In the case of different thicknesses, retainer layer 93C may be thicker than retainer layer 93A. Finally, as shown in Figure 5, retainer layer 93C is intended to be heated directly by the corresponding side of heater 47.

The first portion 81 of the heater portion 15 may also include several layers. Therefore, according to the same example of FIG. 5 , the first portion 81 includes one substrate layer 94A and one retainer layer 94B. Substrate layer 94A is similar to, for example, substrate layer 93B described above and is intended to be heated directly, for example by a corresponding side of heater 47. Retainer layer 94B may also be similar to retainer layers 93A, 93C described above and may contain the same vapor former and/or agent retainer or a different vapor former and/or agent than at least one of the retainer layers 93A, 93C. An agent retainer may be included. Additionally, layers 94A and 94B may have the same thickness or different thicknesses. For example, retainer layer 94B may be thicker than substrate layer 94A.

Of course, many other examples of layer arrangements within each of the heating sections 81, 82 are possible. This arrangement may correspond to any combination of the layers described above. According to some examples, heating portions 81 and 82 may have the same layer composition. Additionally, it will be clear to those skilled in the art that the number of retainer layers and/or their placement and/or their thickness and/or their composition can be adjusted based on the respective desired response time of these layers.

The appended illustrations of Figures 4 and 5 are non-limiting examples of flat tobacco articles of the invention, and numerous modifications and variations of the invention likewise fall within the scope of the appended claims. For example, the flat tobacco article 12 of FIGS. 4 and 5 may have a gap formed between the heating portions 81 and 82 before insertion into the heating chamber 45. This gap may have a shape corresponding to the heater 47 and thus facilitate insertion of the flat tobacco article 12 into the heating chamber 45 and/or, for example, insertion of the heater 47 This can reduce the compression of the heating portions 81 and 82. Moreover, unlike the examples of FIGS. 2, 3, 4 and 5, the heating portions 81 and 82 may also be provided as separate members, each of which heats in contact with opposite sides of the heater 47. It is inserted into the chamber 45.

Claims (13)

A flat-shaped tobacco article (12) comprising a first heating portion (81) and a second heating portion (82) designed to be arranged parallel to the first heating portion (81),
The first heating portion (81) comprises a substrate layer (91; 94A) comprising a tobacco substrate;
The second heating portion (82) comprises a retainer layer (92; 93C) comprising a vapor former and an agent retainer retaining the vapor former;
The flat tobacco article (12) is provided with a double-sided flat heater ( configured to receive at least a portion of a double-sided flat heater (47), the substrate layer (91; 94A) and the retainer layer (92) of the first heating portion (81) and the second heating portion (82); 93C) are flat tobacco articles (12) each arranged to be heated directly by a corresponding side of the flat heater (47). 2. The method of claim 1, wherein the agent retainer comprises:
- Non-woven;
- cotton fabric;
- paper
A flat tobacco article (12) selected from the group consisting of: 3. The method of claim 1 or 2, wherein the vapor former is:
- polyols such as sorbitol, glycerol;
- glycols, such as propylene glycol or triethylene glycol;
- non-polyols, such as monohydric alcohols;
- acids, such as lactic acid, glycerol derivatives;
- Esters, such as triacetin, triethylene glycol diacetate, triethyl citrate, glycerin or vegetable glycerin;
- Any mixture of the above-mentioned ingredients
A flat tobacco article (12) selected from the group consisting of: Flat cigarette according to any one of claims 1 to 3, wherein the first heating portion (81) further comprises at least one retainer layer (94B) disposed parallel to the substrate layer (94A). Goods (12). 5. Flat tobacco article (12) according to claim 4, wherein the retainer layer (94B) of the first heating portion (81) is arranged to be heated through the corresponding substrate layer (94A). Flat type according to any one of claims 1 to 5, wherein the second heating section (82) further comprises a substrate layer (93B) disposed parallel to the retainer layer (93C) of the heating section. Tobacco articles (12). 7. The method of claim 6, wherein the second heating portion (82) comprises two retainer layers (93A, 93C) and the substrate layer (93B) is disposed between the two retainer layers (93A, 93C). Flat tobacco articles (12). 8. The flat layer of claim 7, wherein the two retainer layers (93A, 93C) of the second heating portion (82) have different thicknesses and/or comprise different vapor formers and/or comprise different agent retainers. Type Tobacco Articles (12). 9. Flat tobacco article (12) according to any one of the preceding claims, wherein the second heating portion (82) has a layer composition different from that of the first heating portion (81). 10. Flat tobacco article (12) according to any one of the preceding claims, wherein each heating portion (81, 82) is wrapped with a separate wrapper (83, 84). 11. Flat tobacco article (12) according to any one of the preceding claims, further comprising attachment means (85) for attaching the heating portions or their extensions to each other. 12. The method according to any one of claims 1 to 11, wherein each heating portion (81, 82) is extended by a filter portion (16), preferably both heating portions (81, 82) have a mouthpiece portion ( A flat tobacco article (12), sharing the same parts of 15). - an aerosol generating device (11) comprising a double-sided flat heater (47);
- a flat tobacco article (12) according to any one of claims 1 to 12, which is intended to be heated by said heater (47) to generate an aerosol.
An aerosol generating assembly (10) comprising.