Odor-reducing aerosol-generating article and aerosol-generating system including the same

Abstract

The present invention relates to an aerosol-generating article comprising a tobacco medium portion and one or more filter portions, the tobacco medium portion comprising a tobacco medium blended with a combination of two or more tobacco leaves having a total nitrogen content of 2.5% by weight or less. The present invention also relates to an aerosol-generating system comprising an aerosol-generating article and an aerosol generating device comprising a control unit including at least one processor, a battery, a heater, and an elongated cavity in which the aerosol-generating article is housed, the aerosol-generating article comprising a tobacco medium portion comprising a tobacco medium blended with a combination of two or more tobacco leaves having a total nitrogen content of 2.5% by weight or less.

Description

[Technical Field]

[0001] The present invention relates to odor-reducing aerosol-generating articles and aerosol-generating systems including same. [Background technology]

[0002] Recently, there has been an increasing demand for products that can replace traditional cigarettes. For example, there has been an increasing demand for devices that generate aerosols by electrically heating cigarette sticks (e.g., cigarette-type electronic cigarettes). Therefore, research is being conducted on electrically heated aerosol generators and cigarette sticks (or aerosol-generating products) that can be used with them.

[0003] However, unlike traditional cigarettes, aerosol generators use a method of electrically heating the tobacco medium (so-called electrical steaming), which produces unpleasant odors that users do not want, such as a steamy smell, which is not easily perceived with traditional cigarettes.

[0004] Therefore, there is a need for a method for reducing odors such as stuffy odors in aerosol-generating articles and aerosol-generating systems including the same. Summary of the Invention [Problem to be solved by the invention]

[0005] It is an object of one embodiment of the present invention to provide a tobacco medium blend combination for an aerosol-generating article that has a low total nitrogen content.

[0006] An object of one embodiment of the present invention is to provide a filter for an aerosol-generating article that can reduce the amount of transferred odor components.

[0007] An object of one embodiment of the present invention is to provide an aerosol-generating article including a tobacco medium for an aerosol-generating article and a filter for an aerosol-generating article, which have a low total nitrogen content, and an aerosol-generating system including the same.

[0008] However, the problems that the present invention aims to solve are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0009] One embodiment of the present invention provides an aerosol-generating article comprising a tobacco medium portion and one or more filter portions, wherein the tobacco medium portion comprises a tobacco medium blended with a combination of two or more leaf tobaccos having a total nitrogen content of 2.5% by weight or less.

[0010] According to another embodiment of the present invention, there is provided an aerosol generation system comprising an aerosol-generating article; and an aerosol generating device including a control unit including at least one processor, a battery, a heater, and an elongated cavity in which the aerosol-generating article is housed, wherein the tobacco medium portion of the aerosol-generating article comprises a tobacco medium blended with a combination of two or more leaf tobaccos having a total nitrogen content of 2.5% by weight or less. [Effects of the Invention]

[0011] The aerosol-generating article and the aerosol-generating system including the same according to one embodiment efficiently reduce the amount of total nitrogen transferred compared to components in the leaf such as nicotine and glycerin, thereby reducing the smoky smell and providing the user with a more satisfying smoking experience.

[0012] The effects of the present invention are not limited to the effects described above, but must be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description of the present invention or the claims. [Brief explanation of the drawings]

[0013] The following drawings attached to this specification illustrate a preferred embodiment of the present invention, and together with the detailed description of the invention, serve to further understand the technical concept of the present invention, so the present invention should not be interpreted as being limited to the matters described in such drawings.

[0014] [Figure 1] 1 is a schematic diagram illustrating an aerosol generating system in which an aerosol generating article is combined with an aerosol generating device according to one embodiment of the present invention. [Figure 2] 1 is a schematic diagram illustrating the structure of an aerosol-generating article including a dual composite filter containing activated carbon according to one embodiment of the present invention. [Figure 3] 1 shows the nicotine and total nitrogen content of each blend of tobacco medium according to one embodiment of the present invention. [Figure 4A] Indicates the total amount of nicotine present in the aerosol for each aerosol-generating article. [Figure 4B] The total amount of glycerin present in the aerosol for each aerosol-generating article is shown. [Figure 5A] The reduction rate of the amount of nitrogen compounds transferred for each embodiment is shown compared to V1 (Comparative Example 1) for each aerosol-generating article. [Figure 5B] The nicotine and total nitrogen content in the leaves and the odor component (total nitrogen) content in the aerosol are shown for each aerosol-generating product. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, various modifications may be made to the embodiments, and the scope of the patent application is not limited or restricted by such embodiments. It should be understood that all modifications, equivalents, or alternatives to the embodiments are included in the scope of the patent application.

[0016] The terms used in the embodiments are merely used for the purpose of explanation and are not to be construed as being limiting. A singular expression includes a plural expression unless the context clearly indicates otherwise. In this specification, the terms "comprise" or "have" indicate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0017] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention pertains. Commonly used predefined terms should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted as having an ideal or overly formal meaning unless expressly defined herein.

[0018] In addition, in the description with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. In the description of the embodiments, if a detailed description of related known technology is determined to unnecessarily obscure the gist of the embodiments, the detailed description thereof will be omitted.

[0019] Furthermore, in describing components of the embodiments, terms such as first, second, A, B, (a), (b), etc. are used to distinguish the component from other components, and the terms do not limit the essence, order, or sequence of the components.

[0020] Components having functions common to those included in any of the embodiments will be described using the same names in other embodiments. Unless otherwise specified, the description of one embodiment will be applied to the other embodiments, and detailed description will be omitted to the extent that they overlap.

[0021] Throughout the specification, when any part is said to "comprise" any element, this does not mean to exclude other elements, but to further include other elements.

[0022] In the following embodiments, "humectant" refers to a substance that facilitates the formation of visible smoke and / or aerosol. Examples of humectants include, but are not limited to, glycerin (GLY), propylene glycol (PG), ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. In the art, humectant may be used interchangeably with terms such as aerosol former, wetting agent, etc.

[0023] In the following embodiments, "aerosol-forming substrate" refers to a substance capable of forming an aerosol. The aerosol may contain a volatile compound. The aerosol-forming substrate may be solid or liquid. For example, a solid aerosol-forming substrate may contain a solid substance based on tobacco raw materials, such as cut tobacco, tobacco granules, or reconstituted tobacco. Reconstituted tobacco is classified into slurry-type reconstituted tobacco leaves and paper-type reconstituted tobacco leaves depending on the manufacturing method. A liquid aerosol-forming substrate may contain a liquid-phase composition based on nicotine, tobacco extract, and / or various flavoring agents. However, the scope of the present disclosure is not limited to such examples.

[0024] In the following embodiments, the term "aerosol-generating article" refers to an aerosol-forming substrate, i.e., an article that contains a medium through which an aerosol passes and transfers nicotine contained in the medium. A typical example of an aerosol-generating article is a cigarette, but the scope of the present disclosure is not limited thereto.

[0025] In the following embodiments, "aerosol generating device" means a device that generates an aerosol using an aerosol-forming substrate to generate an aerosol that can be inhaled directly into the user's lungs through the user's mouth.

[0026] In the following embodiments, "upstream" or "upstream direction" means a direction away from the mouth of a user (smoker), and "downstream" or "downstream direction" means a direction towards the mouth of a user. The terms upstream and downstream may be used to describe the relative positions of elements that make up an aerosol-generating article.

[0027] In the following embodiments, "puff" refers to the inhalation of a user, where inhalation refers to drawing in through the user's mouth or nose into the user's oral cavity, nasal cavity, or lungs.

[0028] FIG. 1 illustrates an aerosol generating system including an aerosol generating article and an aerosol generating device according to various embodiments of the present disclosure.

[0029] Referring to FIG. 1 , an aerosol generating device according to an embodiment of the present disclosure may include at least one of a power source 11, a control unit 12, a sensor 13, and a heater 14. At least one of the power source 11, the control unit 12, the sensor 13, and the heater 14 may be disposed inside a main body 10 of the aerosol generating device. The main body 10 provides a space with an opening at the top to allow an aerosol-generating article (stick) S to be inserted. The opening at the top is referred to as an insertion space. The insertion space may be recessed to a predetermined depth toward the inside of the main body 10 so that at least a portion of the aerosol-generating article S can be inserted. The depth of the insertion space corresponds to the length of the region of the aerosol-generating article S containing the aerosol-generating substance and / or tobacco medium. The lower part of the aerosol-generating article S may be inserted into the main body 10, and the upper part of the aerosol-generating article S may protrude outside the main body 10. A user may inhale air by biting the exposed upper part of the aerosol-generating article S.

[0030] The heater 14 heats the aerosol-generating article S. The heater 14 can extend upward into the space into which the aerosol-generating article S is inserted. For example, the heater 14 can include a tubular heating element, a plate-shaped heating element, a needle-shaped heating element, or a rod-shaped heating element. The heater 14 can also be inserted below the aerosol-generating article S. The heater 14 can include an electrical resistance heater and / or an induction heater.

[0031] 1, the heater 14 is a resistive heater. For example, the heater 14 includes an electrically conductive track, and the heater 14 is heated by passing an electric current through the electrically conductive track. The heater 14 is electrically connected to a power source 11. The heater 14 may be heated directly by receiving an electric current from the power source 11.

[0032] For example, the heater 14 may be a multi-heater. The heater 14 includes a first heater 14A and a second heater 14B. The first and second heaters 14A and 14B may be arranged side by side along the longitudinal direction. The first and second heaters 14A and 14B may be heated sequentially or simultaneously.

[0033] As a further example, the aerosol generating device may include an induction coil surrounding the heater. The induction coil may cause the heater to heat. The heater 14 may act as a susceptor, and the heater may be heated by a magnetic field generated by AC current flowing through the induction coil. The magnetic field may penetrate the heater and generate eddy currents within the heater. The current may cause the heater to generate heat.

[0034] As a further example, a susceptor may be included within the aerosol-generating article, and the susceptor within the aerosol-generating article may be heated by a magnetic field generated by AC current flowing through an induction coil. The susceptor may be disposed within the aerosol-generating article and may not be electrically connected to the aerosol-generating device. The susceptor may be inserted into the insertion space together with the aerosol-generating article and removed from the insertion space together with the aerosol-generating article. The aerosol-generating article is heated by the susceptor within the aerosol-generating article. Here, the aerosol-generating device may not be equipped with a heater.

[0035] The power source 11 supplies power to operate the components of the aerosol generating device. The power source 11 may be referred to as a battery. The power source 11 supplies power to at least one of the control unit 12, the sensor 13, and the heater 14. The power source 11 may also supply power to the induction coil.

[0036] The control unit 12 controls the overall operation of the aerosol generating device. The control unit may be mounted on a printed circuit board (PCB). The control unit 12 controls the operation of at least one of the power supply 11, the sensor 13, and the heater 14. The control unit 12 controls the operation of the induction coil. The control unit 12 controls the operation of the display, motor, etc. installed in the aerosol generating device. The control unit 12 can check the status of each component of the aerosol generating device and determine whether the aerosol generating device is in an operable state.

[0037] The control unit 12 analyzes the results detected by the sensor 13 and controls the processing to be executed thereafter. For example, the control unit 12 may control the power supplied to the heater 14 so as to start or end the operation of the heater 14 based on the results detected by the sensor 13. For example, the control unit 12 may control the amount of power supplied to the heater 14 and the time for which the power is supplied so that the heater 14 can heat up to a predetermined temperature or maintain an appropriate temperature based on the results detected by the sensor 13.

[0038] The sensor 13 may include at least one of a temperature sensor, a puff sensor, an insertion detection sensor, and an acceleration sensor. For example, the sensor 13 may detect at least one of the temperature of the heater 14, the temperature of the power source 11, and the temperature inside and outside the main body 10. For example, the sensor 13 may detect a puff by the user. For example, the sensor 13 may detect whether the aerosol-generating article S has been inserted into the insertion space. For example, the sensor 13 may detect the movement of the aerosol-generating device.

[0039] FIG. 2 shows a schematic diagram of the structure of an aerosol-generating article including an activated carbon dual composite filter according to one embodiment of the present invention.

[0040] Referring to FIG. 2, an aerosol-generating article according to one embodiment includes a tobacco medium portion and a filter portion, and the filter portion is a dual composite filter consisting of a filter containing activated carbon and a filter containing cellulose acetate. The aerosol-generating article may further include a tube filter and a paper tube filter. The activated carbon filter may contain 6 to 12 mg, preferably 8 to 12 mg, more preferably 10 to 12 mg, and most preferably 12 mg of activated carbon, particularly super activated carbon. When the filter according to one embodiment of the present invention contains activated carbon in the above-mentioned amounts, it can efficiently reduce the migration of odor-inducing nitrogen compounds such as pyridine, pyrrole, 3-picoline, 3-vinylpyridine, 2-picoline, and 4-picoline. Specific effects of this will be described in detail in the following embodiments.

[0041] The double composite filter is divided into a filter containing activated carbon and a filter containing cellulose acetate, and in view of being able to efficiently reduce the total amount of nitrogen transferred, the filter portion is located below the tobacco medium portion, and specifically, it is preferable that in the double composite filter, the filter containing activated carbon is located above the filter containing cellulose acetate.

[0042] Meanwhile, the length of the double composite filter may be 5 to 14 mm, preferably 12 mm, and the length of each of the activated carbon filter and the cellulose acetate filter may be 5 to 7 mm, preferably 6 mm.

[0043] In addition, the filter unit may further include a paper filter treated with medium chain triglyceride (MCTG), or MCTG may be added to an existing filter such as the above-mentioned dual composite filter.

[0044] In one embodiment, the aerosol-generating article may be packaged in at least one wrapper, which may have at least one hole formed therein for allowing external air to enter or internal gas to escape, and the wrapper may comprise a highly thermally conductive material.

[0045] For example, the tobacco medium section may be wrapped in a tobacco plug wrapper, the dual composite filter may be wrapped in a filter plug wrapper for the acetate filter section, and the dual composite filter and tube filter may be additionally wrapped in tipping paper. Furthermore, the entire aerosol-generating article may be rewrapped in a multi-final wrapper.

[0046] In one embodiment, the at least one wrapper may be made of porous wrapping paper, PLA interleaving paper, sterilized paper, etc. For example, the porosity of the wrapper may be 35000 CU, but is not limited thereto. The thickness of the wrapper may be within the range of 60 μm to 100 μm. The basis weight of the wrapper may be 40 g / m. 2 ~80g / m 2 may be included in the range.

[0047] For example, the wrapper may include an aluminum component, for example, the wrapper may be a conventional filter paper wrapped with a metal foil, such as aluminum foil.

[0048] In one embodiment, the tobacco medium portion may include a cavity, and the cavity may be filled with a tobacco medium. The tobacco medium includes tobacco leaves and an adjunct material, and the adjunct material may be one or more of guar gum, pulp, glycerin, and a casing. The casing may be a flavor type commonly used in the industry.

[0049] The tobacco medium may contain 60 to 65 wt % of leaf tobacco and 35 to 40 wt % of auxiliary materials relative to the total weight of the tobacco medium, with respect to the leaf tobacco and auxiliary materials constituting the tobacco medium.

[0050] On the other hand, the tobacco medium filled in the tobacco medium portion may contain leaf tobacco having a low total nitrogen content of 2.5% by weight or less in order to reduce the amount of total nitrogen transferred on the aerosol, and is a blend of two or more leaf tobaccos having such low total nitrogen contents. For example, the leaf tobacco may be a blend of 15 to 20 parts by weight of Philippine flue-cured tobacco having a nicotine content of 2.40 to 2.60% by weight and a total nitrogen content of 2.20 to 2.40% by weight, 5 to 20 parts by weight of Philippine flue-cured tobacco having a nicotine content of 2.05 to 2.25% by weight and a total nitrogen content of 1.60 to 1.80% by weight, and 15 to 20 parts by weight of Philippine flue-cured tobacco having a nicotine content of 0.01 to 0.20% by weight and a total nitrogen content of 1.70 to 1.80% by weight. The leaf tobacco may be a blend of 0 to 20 parts by weight of flue-cured tobacco produced in Korea having a nicotine content of 1.90% by weight, 5 to 15 parts by weight of flue-cured tobacco produced in Tanzania having a nicotine content of 2.05 to 2.25% by weight and a total nitrogen content of 2.05 to 2.25% by weight, and 0 to 20 parts by weight of flue-cured tobacco produced in Malawi having a nicotine content of 2.80 to 3.00% by weight and a total nitrogen content of 2.15 to 2.35% by weight.

[0051] Generally, even if tobacco has a low total nitrogen content, the total nitrogen transfer rate is not low, and therefore, the combination of tobacco blends described above is considered to be an effective combination for reducing the total nitrogen transfer rate.

[0052] Furthermore, in one embodiment, the average particle size of the tobacco medium may be 30 to 40 μm, and the ratio of particles having a particle size of 80 μm or less to the total number of particles is 90% or more.

[0053] The configuration and effects of the present invention will be described in more detail below with reference to the following embodiments and comparative examples. However, the present embodiments are intended to more specifically describe the present invention, and the scope of the present invention is not limited to these embodiments.

[0054] Embodiment 1) Manufacturing Example 1: Manufacturing of tobacco medium The leaf tobaccos shown in Table 1 below were selected as types of leaf tobacco having a total nitrogen content of 2.5% by weight or less, and were blended according to the blending ratios shown in Table 2 below to produce tobacco medium. On the other hand, Comparative Example 1 relates to a currently used tobacco medium blend.

[0055] [Table 1]

[0056] [Table 2] *The particle size distribution indicates the percentage of particles having a particle size of 80 μm or less.

[0057] 2) Manufacturing Example 2: Manufacturing of aerosol-generating articles a) Manufacturing Example 2-1: Manufacturing of an aerosol-generating article including an activated carbon-containing filter As shown in Figure 2 below, an acetate filter was produced using a 6 mm filter containing 12 mg of activated carbon (super activated carbon; SAC) and a 6 mm cellulose acetate filter, and an aerosol-generating article was produced using a wrapper that included a 12 mm tobacco medium portion containing the blended tobacco medium produced in Production Example 1 above, a 10 mm tube filter, and a 14 mm paper tube filter.

[0058] b) Manufacturing Example 2-2: Manufacturing of an aerosol-generating article including a non-activated carbon-containing filter An aerosol-generating article was prepared in the same manner as in Preparation Example 2-1, except that a 12 mm cellulose acetate filter was prepared without using activated carbon.

[0059] 3) Test Example 1: Analysis of leaf components for each blend The components in the leaves of each blend (Comparative Example 1 and Embodiments 1 to 3) produced in Production Example 1 above were analyzed, and the results are shown in Table 3 below and FIG.

[0060] [Table 3] *The units are % by weight.

[0061] Referring to Table 3, it can be seen that as the nicotine content in the leaves increases, the total nitrogen content tends to increase.

[0062] 4) Test Example 2: Aerosol component analysis for each blend The tobacco medium produced in Production Example 1 was applied to the aerosol-generating articles produced in Production Example 2-1 and Production Example 2-2, and the aerosol components for each blend were analyzed. The results are shown in Table 4 below, and the results for nicotine and glycerin are shown in Figures 4A and 4B.

[0063] [Table 4]

[0064] Referring to Table 4 and Figures 4A and 4B below, it can be seen that when the activated carbon double composite filter was used (Preparation Example 2-1), the contents of aerosol components such as nicotine and glycerin were slightly reduced compared to when only the cellulose acetate filter was used (Preparation Example 2-2), but it was confirmed that the reduction in the glycerin content was relatively small compared to the reduction in the nicotine content.

[0065] Furthermore, when comparing the blends, it can be seen that when the blended tobacco media of Embodiments 1 to 3 are used, the nicotine content is reduced compared to the current blended tobacco medium of Comparative Example 1, and among them, the nicotine content of Embodiments 1 and 2 shows an even greater reduction, but it can be seen that the reduction in glycerin in Embodiment 1 is extremely large compared to Embodiment 2.

[0066] 5) Test Example 3: Analysis of nitrogen component transfer amount Using the same method as in Test Example 4, the amount of migration of nitrogen components generated in the aerosol-generating article was analyzed for each blend and filter, and the reduction rate of the total nitrogen content compared to Comparative Example 1 was calculated. The results are shown in Table 5, Figure 5A, and Figure 5B below.

[0067] [Table 5] *Transfer amount is in μg.

[0068] Referring to Table 5 and Figures 5A and 5B below, it can be seen that Embodiments 1 to 3, which incorporate low-total-nitrogen tobacco with a total nitrogen content of 2.5% by weight or less, reduce the amount of total nitrogen transferred by up to 38%, demonstrating the excellent effect of odor-reducing blended tobacco media according to embodiments of the present invention in reducing the smoking odor. Furthermore, when a dual composite filter containing 12 mg of activated carbon is applied to an aerosol-generating article together with the tobacco medium, the amount of total nitrogen transferred can be reduced by 50 to 60%, demonstrating an extremely excellent effect in reducing odor components (nitrogen compounds). In particular, when the tobacco medium of Embodiment 2 is applied to the dual composite filter, the harmony and balance are excellent, providing users with a more satisfying smoking experience.

[0069] The above description of the embodiments is merely illustrative, and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible. Therefore, the scope of protection of the invention should be determined by the appended claims, and all differences within the scope of the claims should be construed as being within the scope of protection defined by the claims.

[0070] The features and aspects of any of the above-described embodiments may be combined with the features and aspects of any of the other embodiments unless this results in an obvious technical conflict. [Explanation of symbols]

[0071] 1: Aerosol generation system 10: Main body of the aerosol generator 11: Power supply 12: Control unit 13: Sensor 14: Heater 14A: First heater 14B: Second heater S: Aerosol-generating items (sticks) 21: Medium (Tobacco) 22: Tube filter (Hollow Tube) 23: Paper tube filter 24: Acetate filter 241: Double composite filter 242:Activated carbon (12mg) 243: Acetate filter 25: Tobacco Plug Wrapper 26:Multi Final Wrapper 27:Perforation 28: Tipping Paper 29: Acetate filter plug wrapper

Claims

1. 1. An aerosol-generating article comprising a tobacco medium portion and one or more filter portions, the tobacco medium portion comprises a tobacco medium blended with a combination of two or more tobacco leaves having a total nitrogen content of 2.5% by weight or less; The tobacco medium comprises 60 to 65% by weight of flue-cured tobacco relative to the total weight of the tobacco medium; and 35% to 40% by weight of an auxiliary material consisting of one or more of guar gum, pulp, glycerin, and casing; The flue-cured tobacco is 15 to 20 parts by weight of a first leaf tobacco having a nicotine content of 2.40 to 2.60% by weight and a total nitrogen content of 2.20 to 2.40% by weight; 5 to 20 parts by weight of a second tobacco leaf having a nicotine content of 2.05 to 2.25% by weight and a total nitrogen content of 1.60 to 1.80% by weight; 0 to 20 parts by weight of a third tobacco leaf having a nicotine content of 0.01 to 0.20% by weight and a total nitrogen content of 1.70 to 1.90% by weight; 5 to 15 parts by weight of a fourth tobacco leaf having a nicotine content of 2.05 to 2.25% by weight and a total nitrogen content of 2.05 to 2.25% by weight; 0 to 20 parts by weight of a fifth leaf tobacco having a nicotine content of 2.80 to 3.00% by weight and a total nitrogen content of 2.15 to 2.35% by weight; An aerosol-generating article obtainable by blending

2. the first leaf tobacco is flue-cured tobacco from the Philippines; the second tobacco is flue-cured tobacco from the Philippines; the third leaf tobacco is flue-cured tobacco produced in Korea; the fourth leaf tobacco is flue-cured tobacco from Tanzania; 2. The aerosol-generating article of claim 1, wherein the fifth tobacco leaf is flue-cured tobacco from Malawi.

3. The average particle size of the tobacco medium is 30 to 40 μm; 2. The aerosol-generating article according to claim 1, wherein the proportion of particles having a particle size of 80 μm or less is 90% or more.

4. 2. The aerosol-generating article according to claim 1, wherein the filter portion includes a filter containing cellulose acetate.

5. The aerosol-generating article according to claim 4 , wherein the filter portion further comprises activated carbon.

6. 6. The aerosol-generating article according to claim 5, wherein the filter portion is a double composite filter comprising a filter containing activated carbon and a filter containing cellulose acetate.

7. 7. The aerosol-generating article of claim 6, wherein the dual composite filter contains 6 to 12 mg of activated carbon.

8. The length of the double composite filter is 10 to 14 mm; The activated carbon filter is 5 to 7 mm in size, 8. The aerosol-generating article according to claim 7, wherein the filter containing cellulose acetate is 5 to 7 mm thick.

9. The aerosol-generating article according to claim 4 , wherein the filter portion further contains medium chain triglyceride (MCTG).

10. The aerosol-generating article according to claim 1 , wherein the filter portion further comprises one or more of a tube filter and a paper tube filter.

11. 1. An aerosol generating system comprising: an aerosol-generating article comprising a tobacco medium portion and one or more filter portions; an aerosol generating device including a controller including at least one processor, a battery, a heater, and an elongated cavity in which the aerosol-generating article is housed; Including, the tobacco medium portion comprises a tobacco medium blended with a combination of two or more tobacco leaves having a total nitrogen content of 2.5% by weight or less; The tobacco medium is composed of 60% by weight of flue-cured tobacco and 40% by weight of an auxiliary material comprising one or more of guar gum, pulp, glycerin, and a casing, based on the total weight of the tobacco medium; The flue-cured tobacco is 20 parts by weight of a first leaf tobacco having a nicotine content of 2.40 to 2.60% by weight and a total nitrogen content of 2.20 to 2.40% by weight; 12 parts by weight of a second tobacco leaf having a nicotine content of 2.05 to 2.25% by weight and a total nitrogen content of 1.60 to 1.80% by weight; 16 parts by weight of a third leaf tobacco having a nicotine content of 0.01 to 0.20% by weight and a total nitrogen content of 1.70 to 1.90% by weight; 10 parts by weight of a fourth leaf tobacco having a nicotine content of 2.05 to 2.25% by weight and a total nitrogen content of 2.05 to 2.25% by weight; An aerosol generating system obtained by blending

12. The first leaf tobacco is flue-cured tobacco produced in the Philippines; the second tobacco is flue-cured tobacco from the Philippines; the third leaf tobacco is flue-cured tobacco produced in Korea; the fourth leaf tobacco is flue-cured tobacco from Tanzania; 12. The aerosol generating system of claim 11.

13. The filter unit includes a double composite filter made of a filter containing activated carbon and cellulose acetate, a paper tube filter, and a tube filter, 12. The aerosol generating system of claim 11, wherein the filter portion is located downstream of the tobacco medium portion.

14. 12. The aerosol generating system of claim 11, wherein the heater is a direct-heated, externally-heated, or inductively-heated heater.

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