WO2023140661A1

WO2023140661A1 - Aerosol generating article and aerosol generating device for receiving the same

Info

Publication number: WO2023140661A1
Application number: PCT/KR2023/000973
Authority: WO
Inventors: Seoksu JANG; Dongsung Kim; Yonghwan Kim; Hunil LIM
Original assignee: Kt&G Corporation
Priority date: 2022-01-21
Filing date: 2023-01-19
Publication date: 2023-07-27
Also published as: KR20230112958A

Abstract

An aerosol generating article is provided. The aerosol generating article includes: an aerosol generating rod in which mainstream smoke is generated; and a cooling filter rod located downstream of the aerosol generating rod, wherein the cooling filter rod is shaped to define a hollow region and, includes cellulose acetate and a porous filler, and includes a BET specific surface area greater than or equal to about 300 m²/g and less than or equal to about 800 m²/g.

Description

AEROSOL GENERATING ARTICLE AND AEROSOL GENERATING DEVICE FOR RECEIVING THE SAME

The present disclosure is related to an aerosol generating article and an aerosol generating device.

An aerosol generating device is a device that extracts certain components from a medium or a substance by producing an aerosol. The medium may contain a multicomponent substance. The substance contained in the medium may be a multicomponent flavoring substance. For example, the substance contained in the medium may include a nicotine component, an herbal component, and/or a coffee component. Recently, various research on aerosol generating devices has been conducted.

A cigarette used with an aerosol generating device may be heated above 200 °C to generate mainstream smoke. In this case, according to the surrounding environment, the mainstream smoke generated from the cigarette may pose a risk of burn injuries to consumers while vaping. Therefore, it is important to cool the temperature of mainstream smoke generated by the cigarette to a temperature appropriate for inhalation.

It is an objective of the present disclosure to solve the above and other problems.

It is another objective of the present disclosure to effectively lower the temperature of mainstream smoke through physical adsorption using a porous filler.

It is yet another objective of the present disclosure to reduce a sense of discomfort that may arise when a user vapes by lowering the temperature of mainstream smoke.

It is yet another objective of the present disclosure to reduce the risk of a burn injury to a user by lowering the temperature of mainstream smoke.

According to one aspect of the subject matter described in this application, an aerosol generating article includes: an aerosol generating rod in which mainstream smoke is generated; and a cooling filter rod located downstream of the aerosol generating rod, wherein the cooling filter rod is shaped to define a hollow region and, includes cellulose acetate and a porous filler, and includes a BET specific surface area greater than or equal to about 300 m²/g and less than or equal to about 800 m²/g.

According to at least one of the embodiments of the present disclosure, the temperature of mainstream smoke may be effectively lowered through physical adsorption using a porous filler.

According to at least one of the embodiments of the present disclosure, a sense of discomfort that may arise when a user vapes may be reduced by lowering the temperature of mainstream smoke.

According to at least one of the embodiments of the present disclosure, the risk of a burn injury to a user may be reduced by lowering the temperature of mainstream smoke.

The additional scope of applicability of the present disclosure will be apparent from the following detailed description. However, those skilled in the art will appreciate that various modifications and alterations are possible, without departing from the idea and scope of the present disclosure, and therefore it should be understood that the detailed description and specific embodiments, such as the preferred embodiments of the present disclosure, are provided only for illustration.

FIGS. 1 and 2 illustrate examples of an aerosol generating article according to embodiments of the present disclosure.

FIG. 3 illustrates a shape of a cooling filter according to an embodiment of the present disclosure.

FIGS. 4 to 6 illustrate examples of an aerosol generating device that receives an aerosol generating article according to embodiments of the present disclosure.

Description will now be given in detail according to exemplary embodiments disclosed herein, with reference to the accompanying drawings. For the sake of brief description with reference to the drawings, the same or equivalent components are provided with the same or similar reference numerals, and description thereof will not be repeated.

In the following description, a suffix such as "module" and "unit" may be used to refer to elements or components. Use of such a suffix herein is merely intended to facilitate description of the specification, and the suffix itself is not intended to give any special meaning or function.

In the present disclosure, that which is well known to one of ordinary skill in the relevant art has generally been omitted for the sake of brevity. The accompanying drawings are used to help easily understand the technical idea of the present disclosure and it should be understood that the idea of the present disclosure is not limited by the accompanying drawings. The idea of the present disclosure should be construed to extend to any alterations, equivalents, and substitutes besides the accompanying drawings.

It will be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another.

It will be understood that when a component is referred to as being "connected to" or "coupled to" another component, it may be directly connected to or coupled to another component, or intervening components may be present. On the other hand, when a component is referred to as being "directly connected to" or "directly coupled to" another component, there are no intervening components present.

As used herein, a singular representation is intended to include a plural representation unless the context clearly indicates otherwise.

Referring to FIG. 1, an aerosol generating article 2 includes a tobacco rod 21 and a filter rod 22.

The filter rod 22 in FIG. 1 is illustrated as a single segment, but the present disclosure is not limited thereto. In other words, the filter rod 22 may consist of a plurality of segments. For example, the filter rod 22 may include a segment for cooling an aerosol and a segment for filtering a predetermined component included in the aerosol. Also, if necessary, the filter rod 22 may further include at least one segment performing another function.

A diameter of the aerosol generating article 2 may be in a range of 5 mm to 9 mm, and a length of the aerosol generating article 2 may be about 48 mm. However, the present disclosure is not limited thereto. For example, a length of the tobacco rod 21 may be about 12 mm, a length of a first segment of the filter rod 22 may be about 10 mm, a length of a second segment of the filter rod 22 may be about 14 mm, and a length of a third segment of the filter rod 22 may be about 12 mm. However, the present disclosure is not limited thereto.

The aerosol generating article 2 may be packed or wrapped by at least one wrapper 24. The wrapper 24 may have at least one hole through which external air is introduced or internal gas is discharged. In one example, the aerosol generating article 2 may be wrapped by one wrapper 24. In another example, the aerosol generating article 2 may be wrapped by two or more wrappers 24 in an overlapping manner. For example, the tobacco rod 21 may be wrapped by a first wrapper 241, the filter rod 22 may be wrapped by

wrappers

242, 243, and 244. And then, the entire aerosol generating article 2 may be repacked or rewrapped by a single wrapper 245. When the filter rod 22 includes a plurality of segments, the plurality of segments may be respectively wrapped by

wrappers

242, 243, and 244.

A first wrapper 241 and a second wrapper 242 may be made of general filter wrapping paper. For example, the first wrapper 241 and the second wrapper 242 may be porous wrapping paper or non-porous wrapping paper. In addition, the first wrapper 241 and the second wrapper 242 may be made of paper with oil resistance and/or an aluminum laminate packaging material.

A third wrapper 243 may be made of hard wrapping paper. For example, a basis weight of the third wrapper 243 may be in a range of 88g/m² to 96g/m², and may preferably be in a range of 90g/m² to 94g/m². In addition, a thickness of the third wrapper 243 may be in a range of 120 μm to 130 μm, and may preferably be 125 μm.

A fourth wrapper 244 may be made of oil-resistant hard wrapping paper. For example, a basis weight of the fourth wrapper 244 may be in a range of 88 g/m² to 96 g/m², and may preferably be in a range of 90 g/m² to 94 g/m². In addition, a thickness of the fourth wrapper 244 may be in a range of 120 μm to 130 μm, and may preferably be 125 μm.

A fifth wrapper 245 may be made of sterile paper (MFW). Here, the sterile paper (MFW) may refer to paper specially designed to have improved tensile strength, water resistance, smoothness, and the like, compared to general paper. For example, a basis weight of the fifth wrapper 245 may be in a range of 57 g/m² to 63 g/m², and may preferably be 60 g/m². In addition, a thickness of the fifth wrapper 245 may be in a range of 64 μm to 70 μm, and may preferably be 67 μm.

A predetermined material may be added into the fifth wrapper 245. Here, an example of the predetermined material may be silicone, but the present disclosure is not limited thereto. For example, silicone may have properties such as heat resistance with little change with temperature, oxidation resistance, resistance to various chemicals, water repellency to water, electrical insulation, etc. However, other than the silicone, any material having the above-described properties may be applied to (or coated on) the fifth wrapper 245.

The fifth wrapper 245 may prevent combustion of the aerosol generating article 2. For example, when the tobacco rod 21 is heated by a heater 13 (see FIGS. 4 to 6), there may be a possibility of combustion of the aerosol generating article 2. In detail, when the temperature rises above the ignition point of any one of the materials or substances included in the tobacco rod 21, the aerosol generating article 2 may be burned. However, as the fifth wrapper 245 includes a non-combustible material, the combustion of the aerosol generating article 2 may be prevented.

Also, the fifth wrapper 245 may prevent a holder 1 (or aerosol generating device 1) from being contaminated by substances produced in the aerosol generating article 2. Liquids may be generated in the aerosol generating article 2 due to a puff by a user. For example, as an aerosol generated in the aerosol generating article 2 is cooled by external air, liquids (e.g., moisture, etc.) may be produced. As the aerosol generating article 2 is wrapped by the fifth wrapper 245, the liquids produced in the aerosol generating article 2 may be prevented from leaking outside of the aerosol generating article 2.

The tobacco rod 21 may include an aerosol generating material (or substance). For example, the aerosol generating material may include at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol, but the present disclosure is not limited thereto. Also, the tobacco rod 21 may contain other additives such as a flavoring agent, a wetting agent, and/or an organic acid. In addition, a flavoring liquid, such as menthol or humectant, may be added to the tobacco rod 21 by being sprayed to the tobacco rod 21.

The tobacco rod 21 may be manufactured in various forms. For example, the tobacco rod 21 may be formed as a sheet or a strand. Also, the tobacco rod 21 may be formed as shredded tobacco obtained by finely cutting a tobacco sheet. In addition, the tobacco rod 21 may be surrounded by a thermally conductive material. For example, the thermally conductive material may be, but is not limited to, a metal foil such as aluminum foil. In one example, the thermally conductive material surrounding the tobacco rod 21 may evenly or uniformly distribute heat transferred to the tobacco rod 21, thereby increasing conduction of the heat applied to the tobacco rod 21. As a result, the taste of tobacco may be improved. Also, the thermally conductive material surrounding the tobacco rod 21 may serve as a susceptor that is heated by an induction heater. Although not shown in the drawing, the tobacco rod 21 may further include an additional susceptor, in addition to the thermally conductive material surrounding an outside thereof.

Meanwhile, the tobacco rod 21 may include an aerosol generating portion (not shown) and a medium portion (not shown). The aerosol generating portion may be located upstream of the medium portion, but the location of the aerosol generating portion is not limited thereto.

The aerosol generating portion includes an aerosol generating material (or substance). For example, the aerosol generating material may include at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. However, the present disclosure is not limited thereto.

The aerosol generating material of the aerosol generating portion may be impregnated into a non-tobacco material. The non-tobacco material, which is a material that is not a tobacco material, may include paper or polylactic acid (PLA). Due to the aerosol generating material included in the aerosol generating portion, the amount of atomization may increase when the user vapes (smokes).

The medium portion may include a medium. The medium may include a tobacco component. The medium may include a non-tobacco material to which a liquid material containing the tobacco component is applied.

The liquid material includes a tobacco component. For example, the tobacco component may be tobacco granules or tobacco fine particles. The tobacco component may be tobacco leaf flakes, tobacco stems, and/or tobacco fine particles generated during tobacco processing. The tobacco component may be crystalline tobacco granules or amorphous tobacco granules. The tobacco component may be shredded tobacco leaves, shredded reconstituted tobacco, reconstituted tobacco leaves, or the like.

The medium portion may further include an additive. The additive may be at least one of a pH adjusting agent, a flavoring agent, an organic acid, and the like.

The pH adjusting agent may be added while manufacturing tobacco granules or reconstituted tobacco sheets. Alternatively, the pH adjusting agent may be added in a manner that a medium contains a granule composed of a pH adjusting agent. The pH adjusting agent may be at least one of calcium carbonate, sodium hydrogen carbonate, calcium oxide, and the like. The pH adjusting agent may adjust the pH of a medium to the alkaline side, thereby facilitating the release of a flavor component from the medium.

The flavoring agent may include licorice, sucrose, fructose syrup, isosweet, cocoa, lavender, cinnamon, cardamom, celery, fenugreek, cascarilla, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, mint oil, cinnamon, caraway, cognac, jasmine, chamomile, menthol, cinnamon, ylang-ylang, sage, spearmint, ginger, coriander, coffee, or the like.

The filter rod 22 may be a cellulose acetate filter. Moreover, the filter rod 22 is not limited to a particular shape. For example, the filter rod 22 may be a cylinder-type rod or a tube-type rod including a hollow therein. Also, the filter rod 22 may be a recess-type rod. When the filter rod 22 consists of a plurality of segments, at least one of the plurality of segments may have a different shape from the others.

The first segment of the filter rod 22 may be a cellulose acetate filter. For example, the first segment may be a tube-type structure including a hollow therein. The first segment may prevent materials or substances in the tobacco rod 21 from being pushed back upon insertion of the heater 13, and may provide the aerosol cooling effect. A diameter of the hollow included in the first segment may be appropriately selected in a range of 2 mm to 4.5 mm, but the present disclosure is not limited thereto.

A length of the first segment may be appropriately selected in a range of 4 mm to 30 mm, but the present disclosure is not limited thereto. The length of the first segment may preferably be 10 mm, but the present disclosure is not limited thereto.

The hardness of the first segment may be controlled by adjusting the content of a plasticizer in the manufacture of the first segment. In addition, the first segment may be manufactured by inserting a structure such as a film or a tube made of the same material or different materials into an inside (e.g., a hollow) thereof.

The second segment of the filter rod 22 cools an aerosol generated when the heater 13 heats the tobacco rod 21. Thus, the user may inhale an aerosol cooled to an appropriate temperature.

A length or a diameter of the second segment may be variously determined according to the shape of the aerosol generating article 2. For example, the length of the second segment may be appropriately selected in a range of 7 mm to 20 mm. The length of the second segment may preferably be about 14 mm, but the present disclosure is not limited thereto.

The second segment may be made by weaving polymer fibers. In this case, a flavoring liquid may be applied to a fiber made of polymers. Alternatively, the second segment may be made by weaving a separate fiber coated with a flavoring liquid and a fiber made of polymers together. Alternatively, the second segment may be made of a crimped polymer sheet.

For example, a polymer may be made of a material selected from the group consisting of polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polylactic acid (PLA), cellulose acetate (CA), and aluminum foil.

As the second segment is made of the woven polymer fiber or the crimped polymer sheet, the second segment may include a single channel or a plurality of channels extending in a longitudinal direction. Here, the "channel" may refer to a passage through which gas (e.g., air or aerosol) passes.

For example, the second segment made of a crimped polymer sheet may be made from a material having a thickness between 5 μm and 300 μm, namely, between 10 μm and 250 μm. Also, a total surface area of the second segment may be between 300 mm²/mm and 1000 mm²/mm. In addition, an aerosol cooling element may be made from a material with a specific surface area between 10 mm²/mg and 100 mm²/mg.

Meanwhile, the second segment may include a thread containing a volatile flavor component. Here, the volatile flavor component may be menthol, but the present disclosure is not limited thereto. For example, the thread may be filled with a sufficient amount of menthol to provide at least 1.5 mg of menthol to the second segment.

The third segment of the filter rod 22 may be a cellulose acetate filter. A length of the third segment may be appropriately selected in a range of 4 mm to 20 mm. For example, the length of the third segment may be about 12 mm, but the present disclosure is not limited thereto.

The third segment may be manufactured to generate a flavor by spraying a flavoring liquid to the third segment. Alternatively, a separate fiber coated with a flavoring liquid may be inserted into the third segment. An aerosol generated in the tobacco rod 21 is cooled while passing through the second segment of the filter rod 22, and the cooled aerosol is delivered to the user through the third segment. Accordingly, when a flavoring element is added to the third segment, the flavor delivered to the user may last longer.

In addition, the filter rod 22 may include at least one capsule 23. Here, the capsule 23 may function to generate a flavor, or may function to generate an aerosol. For example, the capsule 23 may have a structure in which a liquid containing a flavoring material is wrapped with a film. The capsule 23 may have a spherical or cylindrical shape, but the present disclosure is not limited thereto.

Referring to FIG. 2, an aerosol generating article 3 may further include a front-end plug 33. The front-end plug 33 may be disposed on one side opposite a filter rod 32 with respect to a tobacco rod 31. The front-end plug 33 may prevent the tobacco rod 31 from being separated to the outside, and may prevent a liquefied aerosol from flowing into an aerosol generating device (reference numeral 1 of FIGS. 4 to 6) from the tobacco rod 31 while vaping.

The filter rod 32 may include a first segment 321 and a second segment 322. Here, the first segment 321 may correspond to the first segment of the filter rod 22 of FIG. 1, and the second segment 322 may correspond to the third segment of the filter rod 22 of FIG. 1.

A diameter and an overall length of the aerosol generating article 3 may correspond to the diameter and the overall length of the aerosol generating article 2 of FIG. 1. For example, a length of the front-end plug 33 may be about 7 mm, a length of the tobacco rod 31 may be about 15 mm, a length of the first segment 321 may be about 12 mm, and a length of the second segment 322 may be about 14 mm. However, the present disclosure is not limited thereto.

The aerosol generating article 3 may be packed or wrapped by at least one wrapper 35. The wrapper 35 may have at least one hole through which external air is introduced or internal gas is discharged. For example, the front-end plug 33 may be wrapped by a first wrapper 351, the tobacco rod 31 may be wrapped by a second wrapper 352, the first segment 321 may be wrapped by a third wrapper 353, and the second segment 322 may be wrapped by a fourth wrapper 354. And then, the entire aerosol generating article 3 may be repacked or rewrapped by a fifth wrapper 355.

Also, the fifth wrapper 355 may have at least one perforation 36. For example, the perforation 36 may be formed in a region surrounding the tobacco rod 31, but the present disclosure is not limited thereto. The perforation 36 may serve to transfer heat generated by the heater 13 shown in FIGS. 5 and 6 to an inside of the tobacco rod 31.

In addition, the second segment 322 may include at least one capsule 34. Here, the capsule 34 may function to generate a flavor, or may function to generate an aerosol. For example, the capsule 34 may have a structure in which a liquid containing a flavoring material is wrapped with a film. The capsule 34 may have a spherical or cylindrical shape, but the present disclosure is not limited thereto.

The first wrapper 351 may be made by coupling a metal foil, such as aluminum foil, to general filter wrapping paper. For example, a total thickness of the first wrapper 351 may be in a range of 45 μm to 55 μm, and may preferably be 50.3 μm. In addition, a thickness of the metal foil of the first wrapper 351 may be in a range of 6 μm to 7 μm, and may preferably be 6.3 μm. In addition, a basis weight of the first wrapper 351 may be in a range of 50 g/m² to 55 g/m², and may preferably be 53 g/m².

The second wrapper 352 and the third wrapper 353 may be made of general filter wrapping paper. For example, the second wrapper 352 and the third wrapper 353 may be porous wrapping paper or non-porous wrapping paper.

For example, porosity of the second wrapper 352 may be 35000 CU, but the present disclosure is not limited thereto. In addition, a thickness of the second wrapper 352 may be in a range of 70 μm to 80 μm, and may preferably be 78 μm. In addition, a basis weight of the second wrapper 352 may be in a range of 20 g/m² to 25 g/m², and may preferably be 23.5 g/m².

For example, porosity of the third wrapper 353 may be 24000 CU, but the present disclosure is not limited thereto. In addition, a thickness of the third wrapper 353 may be in a range of 60 μm to 70 μm, and may preferably be 68 μm. In addition, a basis weight of the third wrapper 353 may be in a range of 20 g/m² to 25 g/m², and may preferably be 21 g/m².

The fourth wrapper 354 may be made of PLA laminated paper. Here, the PLA laminated paper may refer to three-layer paper consisting of a paper layer, a PLA layer, and a paper layer. For example, a thickness of the fourth wrapper 354 may be in a range of 100 μm to 120 μm, and may preferably be 110 μm. In addition, a basis weight of the fourth wrapper 354 may be in a range of 80 g/m² to 100 g/m², and may preferably be 88 g/m².

The fifth wrapper 355 may be made of sterile paper (MFW). Here, the sterile paper (MFW) may refer to paper specially designed to have improved tensile strength, water resistance, smoothness, and the like, compared to general paper. For example, a basis weight of the fifth wrapper 355 may be in a range of 57 g/m² to 63 g/m², and may preferably be 60 g/m². In addition, a thickness of the fifth wrapper 355 may be in a range of 64 μm to 70 μm, and may preferably be 67 μm.

A predetermined material may be added into the fifth wrapper 355. Here, an example of the predetermined material may be silicone, but the present disclosure is not limited thereto. For example, silicone has properties such as heat resistance with little change with temperature, oxidation resistance, resistance to various chemicals, water repellency to water, electrical insulation, etc. However, other than the silicone, any material having the above-described properties may be applied to (or coated on) the fifth wrapper 355.

The front-end plug 33 may be made of cellulose acetate. In one example, the front-end plug 33 may be made by adding a plasticizer (e.g., triacetin) to cellulose acetate tow. A mono denier of a filament constituting the cellulose acetate tow may be in a range of 1.0 to 10.0, and may preferably be in a range of 4.0 to 6.0. More preferably, the mono denier of the filament of the front-end plug 33 may be 5.0. In addition, a cross section of the filament of the front-end plug 33 may be a Y-shape. A total denier of the front-end plug 33 may be in a range of 20000 to 30000, and may preferably be in a range of 25000 to 30000. More preferably, the total denier of the front-end plug 33 may be 28000.

In addition, if necessary, the front-end plug 33 may include at least one channel, and a cross section of the channel may be formed in various shapes.

The tobacco rod 31 may correspond to the tobacco rod 21 described above with reference to FIG. 1. Therefore, a detailed description of the tobacco rod 31 will be omitted.

The first segment 321 may be made of cellulose acetate. For example, the first segment may be a tube-type structure including a hollow therein. The first segment 321 may be made by adding a plasticizer (e.g., triacetin) to cellulose acetate tow. For example, a mono denier and a total denier of the first segment 321 may be the same as the mono denier and the total denier of the front-end plug 33.

The second segment 322 may be made of cellulose acetate. A mono denier of a filament of the second segment 322 may be in a range of 1.0 to 10.0, and may preferably be in a range of 8.0 to 10.0. More preferably, the mono denier of the filament of the second segment 322 may be 9.0. In addition, a cross section of the filament of the second segment 322 may be a Y-shape. A total denier of the second segment 322 may be in a range of 20000 to 30000, and may preferably be 25000.

FIG. 3 illustrates a shape of a filter rod according to an embodiment of the present disclosure.

Hereinafter, for the sake of convenience, the aerosol generating article 2 shown in FIG. 1 will be used for description, but this may be equally applied to the aerosol generating article 3 shown in FIG. 2.

Herein, the terms "upstream" and "downstream" may be determined based on a direction of air and/or aerosol flowing into the mouth or lungs of a user when the user puffs on an aerosol generating article. For example, in FIGS. 1 and 2, since an aerosol generated in the

tobacco rod

21, 31 is directed to the

filter rod

22, 32, it may be described that the

tobacco rod

21, 31 is located upstream of the

filter rod

22, 32, and the

filter rod

22, 32 is located downstream of the

tobacco rod

21, 31. The "upstream" and "downstream" may be determined according to the relative position between components.

Referring to FIG. 3, the filter rod 22 of the aerosol generating article 2 includes a cooling filter rod 220. The cooling filter rod 220 is a cellulose acetate filter. The cooling filter rod 220 may be a tube-type structure that includes cellulose acetate and has a hollow inside its cylinder.

The cooling filter rod 220 may include a porous filler 222 therein. The porous filler 222 may be filled in a hollow tube 221. An aerosol generated when the aerosol generating article 2 is heated may be cooled while flowing through the hollow in the cooling filter rod 220.

The cooling filter rod 220 may be manufactured by adding a plasticizer to cellulose acetate tow. The cooling filter rod 220 may be formed by opening the cellulose acetate tow and applying steam.

The cooling filter rod 220 may be manufactured by the following processes: opening cellulose acetate fiber by using a winding device; spraying a plasticizer onto the opened acetate tow; applying steam to the acetate tow being sprayed with the plasticizer; shaping into the shape of a rod; and cutting to a predetermined length.

Fiber opening is a process of spreading cellulose acetate fibers or fiber bundles. When fiber is opened, the porous filler 222, such as activated carbon, may be uniformly added throughout the fiber, and the uniformity of properties, including hardness, of a filter may be improved.

In the opening process, various methods for opening cellulose acetate tow may be used. For example, cellulose acetate tow may be hung on a plurality of opening rollers, and then the tow may be gradually expanded in width as being conveyed by the rollers to be opened. For example, cellulose acetate tow may be repeatedly stretched and contracted to be opened.

In the process of spraying a plasticizer to the opened acetate tow, triacetin may be used as the plasticizer, for example.

Meanwhile, in the process of spraying a plasticizer to the opened acetate tow, a plasticizer and a rapid curing agent may be mixed in a certain ratio to be sprayed. For example, triethlene glycol diacrylate (TEGDA) may be used as the rapid curing agent, but the present disclosure is not limited thereto.

The process of applying steam to the acetate tow is a process of treating the acetate tow with steam. The acetate tow may be cured by steam to retain the shape of a filter rod.

The porous filler 222 may be filled in a tube while manufacturing the hollow tube 221. For example, the porous filler 222 may be filled in acetate tow or applied to the surface of acetate tow during the process of opening the acetate tow prior to steam treatment of the acetate tow.

The porous filler 222 filled in the hollow tube 221 may adsorb moisture contained in mainstream smoke. The porous filler 222 may adsorb moisture and all or some volatile components of the water phase components included in the mainstream smoke.

The porous filler 222 may include activated carbon. For example, the activated carbon may include at least one of plant-based activated carbon restored, pulverized, and classified using a coconut shell (coconut husk), a walnut shell, a palm (or palm tree), wood, a woodblock, a bamboo, or coal as a raw material. For example, the activated carbon may include at least one of polymer-based activated carbon and a synthetic resin using a polymer-based raw material such as rayon, polyvinylidene chloride, acrylic resin, or cellulose. For example, the activated carbon may include at least one of mineral-based activated carbon using a mineral-based raw material such as lignite, leki-cheong, anthracite, coke (Koks), coal, or petroleum pitch. The form (or type) of the activated carbon may include at least one of a bead form, a granular form, and a fiber form. Meanwhile, the porous filler 222 may include at least one of zeolite, an aluminum oxide porous body, and silica gel.

Activated carbon is a material with high adsorption performance. It is known that the higher the BET (Brunauer-Emmett-Teller) specific surface area of activated carbon, the higher the adsorption performance of the activated carbon. A specific surface area is defined as the total surface area of a material per unit of mass. The greater the specific surface area, the higher the adsorption performance.

Activated carbon included in the cooling filter rod 220 according to an embodiment of the present disclosure may have a BET specific surface area of 500 to 2500 m²/g. The BET specific surface area of the activated carbon may preferably be 1000 to 2000 m²/g, but the present disclosure is not limited thereto.

Table 1 below shows BET, the amount of nicotine, the amount of glycerin, and the temperature of mainstream smoke according to the addition amount of activated carbon included in the cooling filter rod 220 in accordance with an embodiment of the present disclosure.

Items	Addition amount (mg/mm)	BET (m²/g)	Nicotine (mg/cig)	Gly (mg/cig)	Temperature of mainstream smoke (°C)
#1	0	189	0.66	8.8	64.9
#2	0.05	289	0.67	8.8	64.5
#3	0.1	350	0.67	8.7	63.2
#4	0.3	389	0.65	8.9	63.4
#5	0.5	415	0.66	8.5	61.3
#6	0.55	502	0.66	8.4	61.0
#7	0.65	749	0.64	8.3	60.9
#8	0.7	856	0.62	8.0	60.9
#9	1.0	975	0.62	7.9	58.6

In Table 1 above, "addition amount", which is the amount of activated carbon contained in a cellulose acetate tube, represents the mg content of activated carbon contained per 1 mm of the length of a rod in a longitudinal direction (in a direction from upstream to downstream) of the cooling filter rod 220. In Table 1 above, "BET" refers to a BET specific surface area of the cooling filter rod 220. In Table 1 above, "nicotine" refers to the amount (mg) of nicotine generated per one manufactured aerosol generating article (one cigarette). In Table 1 above, "Gly" refers to the amount (mg) of glycerin generated per one manufactured aerosol generating article (one cigarette). In Table 1 above, "temperature of mainstream smoke" refers to the temperature of aerosol discharged from an aerosol generating article. In Table 1 above, a diameter of a hollow in the cooling filter rod 220 is 3.3 mm.

Referring to Table 1 above, as the amount of activated carbon filled in a hollow tube of the cooling filter rod 220 increases, the BET specific surface area of the cooling filter rod 220 increases, the amount of nicotine and the amount of glycerin decrease, and the temperature of mainstream smoke decreases.

As for the cooling filter rod 220 according to an embodiment of the present disclosure, activated carbon may be included in the hollow tube thereof, so that moisture and some volatile substances in the water phase included in mainstream smoke may be adsorbed by the activated carbon. Accordingly, cooling by adsorption with the use of activated carbon along with cooling by a structure of the hollow tube may allow the temperature of mainstream smoke to be effectively reduced.

Comparing Items #2 to #4 above, when the addition amount of activated carbon is 0.05 mg/mm, the BET specific surface area of the cooling filter rod 220 is 289 m²/g (Items #2), and when the addition amount of activated carbon is 0.1 mg/mm, the BET specific surface area of the cooling filter rod 220 is 350 m²/g (Items #3).

When the addition amount of activated carbon decreases from 0.1 mg/mm to 0.05 mg/mm, there are almost no change in the amount of nicotine and the amount of glycerin, but the temperature of mainstream smoke increases by 1.3 °C. By contrast, when the addition amount of activated carbon increases from 0.1 mg/mm to 0.3 mg/mm, the amount of nicotine and the amount of glycerin decrease, but there is little change in the temperature of mainstream smoke.

At a boundary between the BET specific surface area of 289 m²/g (the addition amount of activated carbon: 0.05 mg/mm) and the BET specific surface area of 350 m²/g (the addition amount of activated carbon: 0.1 mg/mm), the temperature of mainstream smoke changes relatively significantly. Therefore, it can be seen that the BET specific surface area of the cooling filter rod 220 is preferably about 300 m²/g or more or about 350 m²/g or more, in consideration of the tendency of temperature change in mainstream smoke. Alternatively, it can be seen that the addition amount of activated carbon is preferably about 0.1 mg/mm or more or about 0.08 mg/mm or more.

Comparing Items #5 to #9 above, when the addition amounts of activated carbon are 0.5 mg/mm, 0.55 mg/mm, 0.65 mg/mm, and 0.7 mg/mm, the BET specific surface areas of the cooling filter rod 220 are 415 m²/g, 502 m²/g, 749 m²/g, and 856 m²/g, respectively.

Although the addition amount of activated carbon increases from 0.5 mg/mm to 0.7 mg/mm, the temperature of mainstream smoke hardly decreases. However, when the addition amount of activated carbon increases from 0.65 mg/mm to 0.7 mg/mm, the amount of nicotine decreases by 0.02 mg/cig and the amount of glycerin decreases by 0.3 mg/cig. Also, when the addition amount of activated carbon increases from 0.55 mg/mm to 0.65 mg/mm, the amount of nicotine decreases by 0.02 mg/cig.

At a boundary between the BET specific surface area of 749 m²/g (the addition amount of activated carbon: 0.65 mg/mm) and the BET specific surface area of 856 m²/g (the addition amount of activated carbon: 0.7 mg/mm), the amount of nicotine and the amount of glycerin decrease relatively significantly. Also, the amount of nicotine decreases relatively significantly at a boundary between the BET specific surface area of 502 m²/g (the addition amount of activated carbon: 0.55 mg/mm) and the BET specific surface area of 749 m²/g (the addition amount of activated carbon: 0.65 mg/mm).

In addition, in the results of Items #1 and #8, when the BET specific surface area is 856 m²/g (the addition amount of activated carbon: 0.70 mg/mm), the amount of nicotine generated is reduced to about 94%, and the amount of glycerin generated is reduced to about 91%, compared to the case when no activated carbon is added. A decrease in the amount of nicotine and glycerin means a decrease in the amount of atomization during vaping. When the amount of nicotine and the amount of glycerin decrease by a certain level or more, satisfaction of a user when puffing on an aerosol generating article and the feeling of vaping (smoking) may be reduced. Thus, the amount of atomization should be maintained at the certain level or more.

Therefore, in the results of Items #5 to #9, although there is little change in the temperature of mainstream smoke, when considering the tendency of a decrease in the amount of nicotine and/or glycerin, and considering the rate of decrease in the amount of nicotine and/or glycerin compared to the case when no activation carbon is added, it can be seen that 800 m²/g or less (the amount of activated carbon is about 0.65 mg/mm or less) is suitable for the BET specific surface area of the cooling filter rod 220.

As such, the cooling filter rod 220 according to the embodiment of the present disclosure may include a porous filler and have a BET specific surface area greater than or equal to 300 m²/g and less than or equal to 800 m²/g. Alternatively, the porous filler may be activated carbon, and the cooling filter rod 220 may contain 0.1 mg/mm to 0.65 mg/mm or less of activated carbon.

Compared to the case where no porous filler is included in a filter rod, the cooling filter rod 220 according to the embodiment of the present disclosure may reduce the temperature of mainstream smoke generated in the aerosol generating article by about 1.5 °C to 4 °C, and maintain the amount of nicotine at about 95.5% or more and the amount of glycerin at about 92.5% or more.

Meanwhile, in the results of Items #5 to #9, although there is little change in the temperature of mainstream smoke, when considering the tendency of a decrease in the amount of nicotine and/or the amount of glycerin, it can be seen that 500 m²/g or less (the amount of activated carbon is about 0.55 mg/mm or less) is suitable for the BET specific surface of the cooling filter rod 220.

As such, the cooling filter rod 220 according to the embodiment of the present disclosure may include a porous filler and have a BET specific surface area greater than or equal to 300 m²/g and less than or equal to 500 m²/g. Alternatively, the porous filler may be activated carbon, and the cooling filter rod 220 may contain 0.1 mg/mm to 0.55 mg/mm or less of activated carbon.

Compared to the case when no porous filler is included in a filter rod, the cooling filter rod 220 according to the embodiment of the present disclosure may reduce the temperature of mainstream smoke generated in the aerosol generating article by about 1.5 °C to 4 °C, and may maintain the amount of nicotine at about 99.0% or more and the amount of glycerin at about 95.5% or more.

Items	Diameter of hollow (mm)	BET (m2/g)	Nicotine (mg/cig)	Gly (mg/cig)	Temperature of mainstream smoke (°C)
#1	3.3	189	0.66	8.8	64.6
#10	0	-	0.46	5.6	59.8

Table 2 above compares the case where a hollow is formed in the cooling filter rod 220 (tube-type filter) and the case where no hollow is formed in the cooling filter rod 200 (cylinder-type filter). Items #1 above is the same data as Items #1 specified in Table 1. In Items #1 and #10 above, the cooling filter rod 220 includes only cellulose acetate without a porous filler (the addition amount: 0).

Referring to Table 2, it can be seen that the temperature of mainstream smoke is 4.8 °C lower in the cylinder-type filter than in the tube-type filter, and the cylinder-type filter exhibits a higher cooling effect of the mainstream smoke than the tube-type filter. However, the amount of nicotine of the cylinder-type filter is 0.46 mg/cig, which is 0.2 mg/cig lower than that of the tube-type filter, and the amount of glycerin is 5.6 mg/cig, which is 3.2 mg/cig lower than that of the tube-type filter. That is, it can be seen that the cylinder-type filter has higher cooling performance than the tube-type filter, but the amount of atomization is too low. This is because a space through which mainstream smoke flows is narrower in the cylinder-type filter than in the tube-type filter.

In addition, although not specified in Table 2, in the case of the cylinder-type filter, a portion of a hollow tube joined to the tobacco rod 21 was melted by mainstream smoke.

The hollow tube may have an inner diameter of 3 to 3.5 mm (∮). Preferably, the hollow tube may have an inner diameter of 3.3 mm.

When the inner diameter of the hollow tube is less than 3 mm, the cooling effect of mainstream smoke may be high. However, a decreased flow path in the tube may cause the amount of glycerin to be excessively low and the suction resistance to be excessively high. Also, due to the narrow flow path, melting of a portion of the hollow tube joined to the tobacco rod 21 caused by mainstream smoke may occur.

When the inner diameter of the hollow tube is more than 3.5 mm, the amount of glycerin may be high, and the suction resistance may be low. However, an increased flow path may reduce the cooling effect of mainstream smoke.

The cooling filter rod 220 according to the embodiment of the present disclosure may have the shape of a hollow tube, and the hollow tube may have an inner diameter of 3 mm to 3.5 mm.

The cooling filter rod 220 according to the embodiment of the present disclosure may increase the cooling effect of mainstream smoke while suppressing a decrease in the amount of glycerin or an increase in the suction resistance. In addition, melting of a portion of the filter due to mainstream smoke may be prevented.

A user using the aerosol generating article 2 may feel hot or have a sense of discomfort even when the temperature of mainstream smoke increases by 1 °C. In addition, when the temperature of mainstream smoke becomes high, it may cause a burn injury to the user due to inhalation of the mainstream smoke. The cooling filter rod 220 according to an embodiment of the present disclosure may effectively reduce the temperature of mainstream smoke while maintaining the amount of nicotine and the amount of glycerin at a certain level or more. In addition, melting of a portion of the filter due to mainstream smoke may be prevented.

FIGS. 4 to 6 illustrate examples in which the aerosol generating article 2 is inserted into an aerosol generating device.

Referring to FIG. 4, an aerosol generating device 1 includes a battery 11, a controller 12, and a heater 13. Referring to FIGS. 5 and 6, the aerosol generating device 1 further includes a vaporizer 14. In addition, the aerosol generating article 2 may be inserted into an inner space of the aerosol generating device 1.

FIGS. 4 to 6 illustrate components of the aerosol generating device 1, which are related to the embodiments of the present disclosure. However, it will be understood by one of ordinary skill in the art that other general-purpose components may be further included in the aerosol generating device 1, in addition to the components illustrated in FIGS. 4 to 6.

Also, FIGS. 5 and 6 illustrate that the aerosol generating device 1 includes the heater 13. However, if necessary, the heater 13 may be excluded.

In FIG. 4, the battery 11, the controller 12, and the heater 13 are arranged in a row. In FIG. 5, the battery 11, the controller 12, the vaporizer 14, and the heater 13 are arranged in a row. In FIG. 6, the vaporizer 14 and the heater 13 are arranged in parallel. However, the internal structure of the aerosol generating device 1 is not limited to those shown in FIGS. 4 to 6. In other words, the arrangement of the battery 11, the controller 12, the heater 13, and the vaporizer 14 may vary according to the design of the aerosol generating device 1.

When the aerosol generating article 2 is inserted into the aerosol generating device 1, the aerosol generating device 1 may operate the heater 13 and/or the vaporizer 14 to generate an aerosol. The aerosol generated by the heater 13 and/or the vaporizer 14 passes through the aerosol generating article 2 and is delivered to a user.

If necessary, the aerosol generating device 1 may heat the heater 13 even when the aerosol generating article 2 is not inserted into the aerosol generating device 1.

The battery 11 supplies power (electric power) used to operate the aerosol generating device 1. For example, the battery 11 may supply power to heat the heater 13 or the vaporizer 14, and may supply power required for the controller 12 to operate. In addition, the battery 11 may supply power required to operate a display, a sensor, a motor, and the like, installed at the aerosol generating device 1.

The controller 12 controls the overall operation of the aerosol generating device 1. In detail, the controller 12 controls the operation not only of the battery 11, the heater 13, and the vaporizer 14, but also of other components included in the aerosol generating device 1. In addition, the controller 12 may check the state of each of the components of the aerosol generating device 1 to determine whether the aerosol generating device 1 is in an operable state.

The controller 12 includes at least one processor. The processor may be implemented as an array of a plurality of logic gates, or may be implemented as a combination of a general-purpose microprocessor and a memory in which a program executable in the microprocessor is stored. It will be understood by one of ordinary skill in the art that the processor may be implemented in other forms of hardware.

The heater 13 may be heated by the power supplied from the battery 11. For example, when a cigarette (or the aerosol generating article 2) is inserted into the aerosol generating device 1, the heater 13 may be located outside the cigarette. Thus, the heated heater 13 may cause the temperature of an aerosol generating material in the cigarette to rise.

The heater 13 may be an electro-resistive heater. For example, the heater 13 may include an electrically conductive track, and the heater 13 may be heated as current flows through the electrically conductive track. However, the heater 13 is not limited to the example described above, and any other heaters that can be heated to a desired temperature may be used. Here, the desired temperature may be preset in the aerosol generating device 1, or may be set by the user.

Alternatively, as another example, the heater 13 may be an induction heating type heater, namely, an induction heater. In detail, the heater 13 may include an electrically conductive coil for heating the aerosol generating article 2 in an induction heating method, and the aerosol generating article 2 may include a susceptor that can be heated by the induction heater.

For example, the heater 13 may include a tube-type heating element, a plate-type heating element, a needle-type heating element, or a rod-type heating element, and may heat the inside or outside of the aerosol generating article 2 according to the shape of the heating element.

In addition, a plurality of heaters 13 may be arranged in the aerosol generating device 1. Here, the plurality of heaters 13 may be inserted into the aerosol generating article 2, or may be disposed outside the aerosol generating article 2. Alternatively, some of the plurality of heaters 13 may be inserted into the aerosol generating article 2, and the others may be disposed outside the aerosol generating article 2. The shape of the heater 13 is not limited to the shapes shown in FIGS. 4 to 6, and may include various shapes.

The vaporizer 14 may generate an aerosol by heating a liquid composition, and the generated aerosol may pass through the aerosol generating article 2 to be delivered to the user. In other words, the aerosol generated by the vaporizer 14 may flow along an airflow path of the aerosol generating device 1, and the airflow path may be configured such that the aerosol generated by the vaporizer 14 passes through the aerosol generating article 2 to be delivered to the user.

For example, the vaporizer 14 may include a liquid storage, a liquid delivery element, and a heating element, but is not limited thereto. For example, the liquid storage, the liquid delivery element, and the heating element may be included in the aerosol generating device 1 as independent modules.

The liquid storage may store a liquid composition. For example, the liquid composition may be a liquid including a tobacco-containing material having a volatile tobacco flavor component, or a liquid including a non-tobacco material. The liquid storage may be configured to be detachably attached to the vaporizer 14, or may be integrally formed with the vaporizer 14.

For example, the liquid composition may include water, a solvent, ethanol, a plant extract, a flavoring, a flavoring agent, or a vitamin mixture. The flavoring may include, but is not limited to, menthol, peppermint, spearmint oil, various fruit-flavored ingredients, etc. The flavoring agent may include components capable of providing a variety of flavors or tastes to the user. The vitamin mixture may be a mixture of at least one of vitamin A, vitamin B, vitamin C, and vitamin E, but is not limited thereto. Also, the liquid composition may include an aerosol former such as glycerin and propylene glycol.

The liquid delivery element may deliver the liquid composition of the liquid storage to the heating element. For example, the liquid delivery element may be a wick such as cotton fiber, ceramic fiber, glass fiber, or porous ceramic, but is not limited thereto.

The heating element is an element for heating the liquid composition delivered by the liquid delivery element. For example, the heating element may be a metal heating wire, a metal hot plate, a ceramic heater, or the like, but is not limited thereto. In addition, the heating element may include a conductive filament such as a nichrome wire, and may be disposed in a manner of being wound around the liquid delivery element. The heating element may be heated by a current supply, and may transfer heat to the liquid composition in contact with the heating element to thereby heat the liquid composition. As a result, an aerosol may be generated.

For example, the vaporizer 14 may be referred to as a cartomizer or an atomizer, but is not limited thereto.

Meanwhile, the aerosol generating device 1 may further include general-purpose components, in addition to the battery 11, the controller 12, the heater 13, and the vaporizer 14. For example, the aerosol generating device 1 may include a display capable of outputting visual information and/or a motor for outputting tactile information. Also, the aerosol generating device 1 may include at least one sensor (a puff detection sensor, a temperature sensor, a cigarette insertion detection sensor, etc.). In addition, the aerosol generating device 1 may be manufactured to have a structure in which external air may be introduced or internal gas may be discharged even when the aerosol generating article 2 is inserted therein.

Although not shown in FIGS. 4 to 6, the aerosol generating device 1 may constitute a system together with an additional cradle. For example, the cradle may be used to charge the battery 11 of the aerosol generating device 1. Alternatively, the heater 13 may be heated when the cradle and the aerosol generating device 1 are coupled to each other.

As described above, according to at least one of the embodiments of the present disclosure, the temperature of mainstream smoke may be effectively reduced through a physical adsorption method.

Referring to FIGS. 1 to 6, an aerosol generating article 2 according to one aspect of the present disclosure includes: an aerosol generating rod 21 in which mainstream smoke is generated; and a cooling filter rod 220 located downstream of the aerosol generating rod 21, wherein the cooling filter rod 220 is shaped to define a hollow region and, includes cellulose acetate and a porous filler 222, and includes a BET specific surface area greater than or equal to about 300 m²/g and less than or equal to about 800 m²/g.

According to another aspect of the present disclosure, the BET specific surface area may be greater than or equal to 300 m²/g and less than or equal to 500 m²/g.

According to another aspect of the present disclosure, the hollow region may be a hollow tube 221 defined by the cellulose acetate. The porous filler 222 may be filled in the hollow tube 221.

According to another aspect of the present disclosure, the hollow tube 221 may be formed by opening cellulose acetate tow and applying steam to the tow. The porous filler 222 may be filled in the tow or filled on a surface of the tow when opening the tow.

According to another aspect of the present disclosure, the hollow tube 221 may have an inner diameter of about 3 mm to about 3.5 mm.

According to another aspect of the present disclosure, the porous filler 222 may include activated carbon. The activated carbon may be made from at least one of a coconut shell, a palm, wood, a woodblock, a bamboo, or coal. A form of the activated carbon may include at least one of a bead form, a granular form, or a fiber form.

According to another aspect of the present disclosure, the porous filler 222 may adsorb moisture contained in the mainstream smoke.

According to another aspect of the present disclosure, the porous filler 222 may include activated carbon. The cooling filter rod 220 may include about 0.1 mg/mm to about 0.65 mg/mm of the activated carbon in a longitudinal direction extending from upstream to downstream.

According to another aspect of the present disclosure, the porous filler 222 may include activated carbon. The cooling filter rod 220 may include about 0.1 mg/mm to about 0.55 mg/mm of the activated carbon in a longitudinal direction extending from upstream to downstream.

According to another aspect of the present disclosure, a heating-type aerosol generating device 1 configured to generate an aerosol through the aerosol generating article may be provided.

Certain embodiments or other embodiments of the disclosure described above are not mutually exclusive or distinct from each other. Any or all elements of the embodiments of the disclosure described above may be combined with another or combined with each other in configuration or function.

For example, a configuration "A" described in one embodiment of the disclosure and the drawings, and a configuration "B" described in another embodiment of the disclosure and the drawings may be combined with each other. Namely, although the combination between the configurations is not directly described, the combination is possible except in the case where it is described that the combination is impossible.

Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings, and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.

Claims

An aerosol generating article comprising:

an aerosol generating rod in which mainstream smoke is generated; and

a cooling filter rod located downstream of the aerosol generating rod,

wherein the cooling filter rod is shaped to define a hollow region and, comprises cellulose acetate and a porous filler, and

wherein the cooling filter rod includes a Brunauer-Emmett-Teller (BET) specific surface area greater than or equal to about 300 m²/g and less than or equal to about 800 m²/g.
The aerosol generating article of claim 1, wherein the BET specific surface area is greater than or equal to about 300 m²/g and less than or equal to about 500 m²/g.
The aerosol generating article of claim 1, wherein the hollow region is a hollow tube defined by the cellulose acetate, and

wherein the porous filler is filled in the hollow tube.
The aerosol generating article of claim 3, wherein the hollow tube is formed by opening cellulose acetate tow and applying steam to the tow, and

wherein the porous filler is filled in the tow or filled on a surface of the tow when opening the tow.
The aerosol generating article of claim 3, wherein the hollow tube has an inner diameter of about 3 mm to about 3.5 mm.
The aerosol generating article of claim 1, wherein the porous filler comprises activated carbon,

wherein the activated carbon is made from at least one of a coconut shell, a palm, wood, a woodblock, a bamboo, or coal, and

wherein a form of the activated carbon comprises at least one of a bead form, a granular form, or a fiber form.
The aerosol generating article of claim 1, wherein the porous filler adsorbs moisture contained in the mainstream smoke.
The aerosol generating article of claim 1, wherein the porous filler comprises activated carbon, and

wherein the cooling filter rod comprises about 0.1 mg/mm to about 0.65 mg/mm of the activated carbon in a longitudinal direction extending from upstream to downstream.
The aerosol generating article of claim 1, wherein the porous filler comprises activated carbon, and

wherein the cooling filter rod comprises about 0.1 mg/mm to about 0.55 mg/mm of the activated carbon in a longitudinal direction extending from upstream to downstream.
A heating-type aerosol generating device configured to generate an aerosol through the aerosol generating article according to any one of claims 1 to 9.