JP2024512549A - Tobacco materials, methods of making the tobacco materials, filters comprising the tobacco materials, and aerosol-generating articles comprising the filters. - Google Patents

Abstract

Examples include a core comprising a first tobacco mixture and a shell surrounding at least a portion of the core and comprising a second tobacco mixture, the first tobacco mixture comprising first tobacco particles and a flavoring material, and a second tobacco mixture comprising a second tobacco mixture. includes second tobacco particles, and the shell is of tobacco material having a surface roughness (Ra) of about 5.0 to 10.0. [Selection diagram] Figure 1

Description

The present invention relates to tobacco materials, methods of making the tobacco materials, filters comprising the tobacco materials, and aerosol-generating articles comprising the filters.

Recently, there has been an increased demand for alternatives to traditional cigarettes. For example, there is an increasing demand for devices that heat an aerosol-generating material in an aerosol-generating article (eg, a cigarette) without combustion to generate an aerosol.

The problem to be solved by the present invention is to provide a tobacco material and a method for producing the same that can provide a user with different flavors in the early and late stages of smoking.

The problems to be solved through the examples are not limited to the problems described above, and problems not mentioned will be clearly understood by those with ordinary knowledge in the technical field to which the examples belong from this specification and the accompanying drawings. Will.

As a technical means to achieve the above-mentioned technical problem, one embodiment includes a core containing a first tobacco mixture and a shell surrounding at least a part of the core and containing a second tobacco mixture, the shell comprising a second tobacco mixture; includes a first tobacco particle and a flavoring material, a second tobacco mixture includes a second tobacco particle, and the shell provides a tobacco material having a surface roughness (Ra) of 5.0 to 10.0.

Another embodiment provides a filter included in an aerosol-generating article, the filter comprising the tobacco material.

Still other embodiments include aerosol-generating articles that include the filter.

Still other embodiments provide a method of manufacturing a tobacco material comprising a first step of manufacturing a core using a first composition comprising a flavoring substance and a second step of forming a shell over the core surrounding at least a portion of the core. I will provide a.

The means for solving the problems are not limited to those described above, and may include any matter that can be inferred by a person of ordinary skill in the present disclosure.

A tobacco material according to an embodiment can be applied to a filter of an aerosol-generating article to provide a user with different flavors in the early and late stages of smoking. In addition, it has the effect of being able to appropriately adjust the transmission timing, transfer rate, transmission rate, etc. of flavor substances.

Further, according to the method for manufacturing tobacco material according to the embodiment, tobacco material can be manufactured through a simple process and is suitable for mass production.

The effects of the embodiments are not limited to those described above, and may include any effects that can be inferred from the configuration described below.

1 is a diagram schematically illustrating a cross-section of tobacco material according to one embodiment; FIG. 1 schematically depicts a filter containing tobacco material according to one embodiment; FIG. Figure 3 schematically shows a filter containing tobacco material according to another embodiment; 1 is a diagram illustrating an example of an aerosol-generating article according to one embodiment. FIG. 7 is a drawing showing an example of an aerosol-generating article according to another embodiment. 1 is a flowchart of a method of manufacturing tobacco material according to one embodiment. 1 is a diagram illustrating a first step of a method for manufacturing tobacco material according to an embodiment; FIG. 2 is a diagram illustrating a second step of a method for manufacturing tobacco material according to an embodiment; FIG.

One embodiment includes a core comprising a first tobacco mixture and a shell surrounding at least a portion of the core and comprising a second tobacco mixture, the first tobacco mixture comprising first tobacco particles and a flavoring material, and a second tobacco mixture comprising a second tobacco mixture. The mixture includes second tobacco particles and the shell provides tobacco material having a surface roughness (Ra) of about 5.0 to 10.0.

The first tobacco mixture contains the flavoring substance in an amount of 90% or more by weight based on the total weight of the first tobacco mixture.

The core may have a size of about 30 mesh to 50 mesh, and the tobacco material may have a size of about 18 mesh to 25 mesh.

The tobacco material may have a hardness of 90% or more.

The tobacco material may contain about 5.0% to 8.0% water by weight based on the total weight of the tobacco material.

Other embodiments provide a filter containing the tobacco material as a filter included in an aerosol-generating article.

The filter includes a first filter section including a first filter element, a flavoring section including the tobacco substance, and a second filter section including a second filter element, the first filter section, the flavoring section, and the second filter The portions may be sequentially arranged in a longitudinal direction of the filter.

Still other embodiments include aerosol-generating articles that include the filter.

Still other embodiments provide a method of manufacturing a tobacco material, comprising a first step of manufacturing a core with a first composition that includes a flavoring agent, and a second step of forming a shell surrounding at least a portion of the core. .

In the first step, the first composition may be grown by injecting the first composition into a fluidized bed reactor at a temperature of about 30° C. to 60° C. and a pressure of 1.5 bar or less.

The first composition comprises about 99% v/v to 99% v/v of the flavoring agent, about 0.5% v/v to 5% v/v of tobacco powder, and about 0.5% v/v of water. -5% v/v.

The second step includes positioning a core in a fluidized bed reactor and injecting a second composition into the fluidized bed reactor at a temperature of about 50° C. to 90° C. and a pressure of 1.5 bar or less. and coating a surface of the core with the second composition.

The second composition may include about 10% to 20% by weight of tobacco powder, about 40% to 60% by weight of water, and about 30% to 40% by weight of ethanol.

The terms used in the examples were selected from common terms that are currently widely used as much as possible while taking into account the functions of the examples; It also varies depending on the appearance of. Furthermore, in certain cases, there may be terms arbitrarily selected by the applicant, in which case their meanings will be described in detail in the explanation section of the relevant embodiment. Therefore, the terms used in this embodiment must be defined based on the meanings of the terms and the overall content of the present invention, not just their names.

Throughout the specification, when a part is said to "include" a certain component, it does not mean that it excludes other components, but may also include other components, unless there is a statement to the contrary. It means that. In addition, terms such as "...unit" and "...module" described in the specification mean a unit that processes at least one function or operation, and it is realized by hardware or software, or It can also be realized by combining hardware and software.

Additionally, terms including ordinal numbers such as "first" or "second" used herein are used to describe various components, but the components should not be limited by the terms. . Terms are only used to distinguish one component from another.

Throughout the specification, "aerosol-generating article" refers to an article used for smoking. For example, the aerosol-generating article can be a conventional combustible cigarette that is lit and burned, or a heated cigarette that is heated without combustion by an aerosol-generating device. As another example, an aerosol-generating article is an article used with a cartridge containing a liquid that, when heated, generates an aerosol.

Throughout the specification, "longitudinal direction of the aerosol-generating article" means the direction in which the length of the aerosol-generating article extends or the direction in which the aerosol-generating article is inserted into an aerosol-generating device.

Throughout the specification, "tobacco element" means an element containing tobacco material.

Throughout the specification, "tobacco material" means any form of material containing components derived from tobacco leaves.

Throughout the specification, "tobacco particles" refers to the particulate form of components derived from the tobacco plant. For example, tobacco particles can also be tobacco grains or tobacco powder.

Throughout the specification, "cooling element" refers to an element that cools a substance. For example, the cooling element may cool the aerosol generated from the aerosol generating element or the tobacco element.

Throughout the specification, "filter element" refers to an element that includes filtration material. For example, the filter element includes multiple fiber strands.

Throughout the specification, "surface roughness" refers to the roughness of the surface of an object. For example, surface roughness may be expressed as centerline average roughness (Ra) according to the KS B 0161 standard.

Hereinafter, embodiments of the present disclosure will be described in detail based on the accompanying drawings so that those with ordinary knowledge in the technical field to which the present disclosure pertains can easily implement them. However, the present disclosure may be embodied in various forms different from each other and is not limited to the embodiments described herein.

Hereinafter, embodiments of the present disclosure will be described in detail based on the drawings.

FIG. 1 is a diagram schematically illustrating a cross-section of a tobacco material 10 according to one embodiment.

Tobacco material 10 according to one embodiment may include a core 11 containing a first tobacco mixture and a shell 12 surrounding at least a portion of core 11 and containing a second tobacco mixture.

Referring to FIG. 1, a tobacco material 10 according to one embodiment includes a core 11 and a shell 12 surrounding at least a portion of the core 11. In this manner, the first tobacco mixture may be located at the center of the tobacco material 10, and the second tobacco mixture may be located at the periphery. That is, the first tobacco mixture may be partially or completely surrounded by the second tobacco mixture.

Core 11 may include a first tobacco mixture. The first tobacco mixture can include first tobacco particles and a flavoring agent.

The first tobacco particles can also be, for example, but not limited to, tobacco powder with a size of about 0.1-0.3 mm.

According to embodiments, the first tobacco particles may include various types of tobacco powder. The first tobacco particles may include, for example, at least one of yellow tobacco powder, burley tobacco powder, fire-cured tobacco powder, sun-cured tobacco powder, and air-cured tobacco powder.

Flavoring substances are also substances that produce a specific odor. For example, flavoring substances include cinnamon, sage, herbs, chamomile, arrowroot, sweet tea, lavender, bergamot, lemon, orange, cinnamon, jasmine, ginger, vanilla, spearmint, peppermint, acacia, coffee, celery, sandalwood, cocoa, etc. may contain botanical flavorings.

As another example, flavoring substances can include animal flavors such as musk, ambergris, civet, castoreum, and the like.

As another example, flavoring substances are also alcoholic compounds such as menthol, geraniol, linalool, anethole, eugenol. Flavoring substances are also aldehyde compounds such as vanillin, benzaldehyde, anisaldehyde. Flavoring substances are also ester compounds such as isoamyl acetate, linalyl acetate, isoamyl propionate, and linalyl butyrate. Desirably, the flavoring substance is also menthol.

Shell 12 includes a second tobacco mixture. The second tobacco mixture includes second tobacco particles. Regarding the second tobacco particles, the same or similar explanations for the first tobacco particles described above may be applied.

The second tobacco mixture may also be, for example, a tobacco paste comprising second tobacco particles. The second tobacco mixture can be formed using a solvent such as water and/or ethanol to have a suitable viscosity. The second tobacco mixture may still have moisture after the solvent is removed. Details regarding the process of manufacturing the second tobacco mixture will be described later.

The tobacco material 10 according to one embodiment can be applied to a filter of an aerosol-generating article to provide a user with different flavors in the early and late stages of smoking. If aerosol at a temperature of about 40° C. or higher is continuously transmitted to the filter during smoking, fine holes are formed in the shell 12 of the tobacco material 10 contained in the filter. Thereby, the flavor substance contained in the core 11 can leak from the core 11 and be transmitted to the user. That is, the flavor substances contained in the core 11 of the tobacco substance 10 are blocked by the shell 12 surrounding the core 11 and are not transferred in the early stages of smoking, but the flavor substances contained in the core 11 are transferred in the latter half of smoking. By being transferred through the fine holes formed in the shell 12, it is possible to provide the user with different flavors in the early and late stages of smoking.

In general, for aerosol-generating articles containing traditional highly volatile flavoring substances (e.g., menthol), most of the flavoring substances contained in the early stages of smoking are transferred, which results in a lower transfer rate in the later stages of smoking. It tends to decrease rapidly. On the other hand, according to the embodiment, by adjusting the physical properties such as the thickness, viscosity, and roughness of the shell 12, the transmission timing, transfer rate, and transmission rate of the flavor substance contained in the core 11 can be appropriately adjusted. It has the effect that it can.

Here, in the overall smoking time, the part that corresponds to the early part of the smoking time, for example, the time length that corresponds to almost the first half of the smoking time, corresponds to the "early smoking period", and the remaining time length of the smoking time falls under the "second half of smoking" category.

Shell 12 may have a surface roughness (Ra) of 5.0 to 10.0. Even though the tobacco material 10 illustrated in FIG. 1 is generally spherical, the tobacco material 10 of the shell 12 has an amorphous shape (i.e., the morphology of the particles is not uniform). and can have relatively high surface roughness. As discussed below, tobacco material 10 according to one embodiment may be placed in an embedded form between the acetate fibers of a filter within an aerosol-generating article. Here, the surface roughness of the shell 12 is related to the total amount of tobacco material 10 embedded between the acetate fibers. If the surface roughness of the shell 12 is less than 5.0, it has a low surface friction force, so it is difficult to fix the position of the tobacco material 10 between the acetate fibers, and it is difficult to apply a large amount of the tobacco material 10 into the filter. . If the surface roughness of the shell 12 exceeds 10.0, the acetate fibers may be damaged if a large amount of tobacco material 10 is placed between the acetate fibers due to excessively high surface friction forces.

Tobacco material 10 may have a generally sphere shape. The core 11 and the shell 12 formed around the core 11 may have a spherical shape, but are not limited thereto. As mentioned above, the shell 12 may have a somewhat rough surface.

The first tobacco mixture may include about 90% or more flavoring material by weight based on the total weight of the first tobacco mixture. That is, the weight of the flavoring material included in the first tobacco mixture is also about 90% or more of the total weight of the first tobacco mixture. When the first tobacco mixture contains about 90% by weight or more of the flavoring substance, the flavor of the flavoring substance released from the core 11 is not diluted by other ingredients and can be completely provided. Furthermore, if an excessive amount of a substance other than a flavoring substance is added, the volatility of the flavoring substance decreases and the flavor cannot be transmitted smoothly. In an aspect of improving flavor delivery, the first tobacco mixture may include about 95% or more by weight of the flavor substance of the first tobacco mixture.

Core 11 may have a density of about 0.5-0.7 g/cc. Desirably, core 11 may have a specific gravity of about 0.55-0.65 g/cc.

Referring to FIG. 1, the core 11 may have a size of approximately 30-50 mesh, and the tobacco material 10 may have a size of approximately 18-25 mesh. That is, core 11 may have a diameter d1 of approximately 0.297-0.595 mm, and tobacco material 10 may have a diameter d2 of approximately 0.7-1 mm. When the core 11 and the tobacco material 10 have the above size range, fine holes begin to be formed in the shell 12 during the second half of smoking, and the incense during the second half of smoking can be uniformly released.

When the tobacco material 10 has a size of less than about 18 mesh (i.e., has a diameter d2 of more than about 1 mm), the thick shell 12 makes it difficult for fine holes to be formed in the shell 12, and the flavor substances in the latter half of smoking are difficult to form. Difficult to release. If the tobacco material 10 has a size greater than about 25 mesh (ie, has a diameter d2 less than about 0.7 mm), the thin shell 12 may release flavor too quickly.

Further, when the core 11 has a size of less than about 30 meshes (that is, when it has a diameter d1 of more than about 0.595 mm), the amount of flavor transferred gradually increases over time. As a result, a uniform flavor cannot be provided during smoking. If the core 11 has a size greater than about 50 mesh (i.e., has a diameter d2 less than about 0.297 mm), the content of flavoring substances within the tobacco material 10 is so low that as smoking proceeds, , the amount of flavor transfer can decrease rapidly.

Tobacco material 10 may have a hardness of about 90% or more. Specifically, tobacco material 100 may have a hardness of about 95% to 99.9%. "Hardness of tobacco material" refers to physical properties related to elasticity and recovery, and refers to the degree to which tobacco material 10 resists pressure applied in a vertical direction. "Hardness of tobacco material" is measured using a hardness meter and calculated using the following formula.

Hardness (%) = [Da]/D*100

(D: Diameter of tobacco material, a: Distance (mm) where tobacco material is pressed by a 300g weight)

If the tobacco material 10 has a hardness of less than about 90%, the shape of the tobacco material 10 may not be maintained during the manufacturing process of the filter containing the tobacco material 10 and the shell 12 may be damaged and the core 11 may be damaged. can be exposed to Moreover, the flavor substances inside the core 11 begin to be transferred from the early stages of smoking, and other flavors may not be provided during the latter half of smoking.

The tobacco material 10 may contain about 5.0% to 8.0% water by weight based on the total weight of the tobacco material 10. The moisture contained in the tobacco material 10 helps form micropores in the shell 12 by absorbing the heat applied during smoking. If the tobacco material 10 contains less than about 5.0% water by weight based on the total weight of the tobacco material 10, sufficient fine holes may not be formed in the shell 12, and the amount of flavor substances transferred to the core 11 may be reduced. . If the tobacco material 10 contains water in excess of about 8.0% by weight based on the total weight of the tobacco material 10, the tobacco material 10 may not be able to maintain its shape due to the excessively high water content, or the tobacco material 10 may become shell-like in the early stages of smoking. Too many holes may be formed in 12. As a result, flavor substances may begin to be transferred too quickly.

Core 11 may have a moisture content of about 8.0% to 15.0% by weight based on the total weight of core 11. When the core 11 contains moisture in the numerical range described above, the core 11 can improve at least one of aroma retention and aroma development. Moreover, since the moisture content of the core 11 is higher than that of the shell 12, the tobacco material 10 has excellent hardness, aroma retention, and aroma development.

Tobacco material 10 may have a density of about 0.6 g/cc or more. Desirably, tobacco material 10 may have a specific gravity of about 0.7 g/cc or greater.

A filter is provided that includes the tobacco material 10 described above.

FIG. 2A is a diagram schematically illustrating a filter 240f including tobacco material 10 according to one embodiment.

Referring to FIG. 2A, a filter 240f according to one embodiment may be arranged such that a plurality of tobacco materials 10 are embedded between filter elements. The filter element is also a cellulose acetate filter. Cellulose acetate filters can include a fiber bundle that is a collection of multiple cellulose acetate fiber strands. That is, the plurality of tobacco materials 10 included in the filter 240f according to one embodiment may be embedded between the plurality of cellulose acetate fibers.

The shape of the filter element is not limited. For example, the filter element can be a cylindrical rod or a tubular rod with a hollow interior. The filter element may also be a recessed rod. If the filter element is composed of multiple segments, at least one of the multiple segments may also be made in a different shape.

FIG. 2B is a diagram schematically illustrating a filter 240f containing tobacco material 10 according to another embodiment.

Referring to FIG. 2B, the filter 240f may include a first filter part 241, a flavor part 242, and a second filter part 243. Specifically, the first filter part 241, the flavor part 242, and the second filter part 243 may each include a first filter element, a tobacco substance 10, and a second filter element. The first filter part 241, the flavor part 242, and the second filter part 243 may be sequentially arranged based on the longitudinal direction of the filter 240f. Here, the longitudinal direction of the filter 240f is also the direction in which the length of the filter 240f extends.

The first filter element and the second filter element included in the first filter part 241 and the second filter part 243 may be the same or different from each other. The same matters regarding the filter elements described above with respect to FIG. 2A may be applied to the first filter element and the second filter element.

The flavor part 242 may be located between the first filter part 241 and the second filter part 243. The flavor section 242 includes a hollow tubular filter element, and a plurality of tobacco substances 10 may be arranged in the hollow shape.

Alternatively, flavor portion 242 may include tobacco material 10 without a filter element. Here, the flavor portion 242 may include a plurality of tobacco substances 10 therein and be surrounded by the wrapper of the filter 24Of.

In the filter 240f according to FIGS. 2A and 2B, fine holes are formed in the shell 12 of the tobacco substance 10 contained in the filter 240f by high-temperature aerosol transferred to the user during smoking, and the flavor substance contained in the core 11 is transferred to the user. can be transmitted to That is, the filter 240f prevents the flavor substances contained in the core 11 of the tobacco substance 10 from being transferred during the early stages of smoking because the flavor substances contained in the core 11 are blocked by the shell 12 surrounding the core 11. As a result, the flavor substances are transferred through the fine holes formed in the shell 12 during the latter half of smoking, and different flavors can be provided to the user during the early and late stages of smoking.

FIG. 3A is a diagram illustrating an example of an aerosol-generating article 200 according to one embodiment. Aerosol generating article 200 according to one embodiment may include filter 240f that includes tobacco material 10 as described above. Aerosol generating article 200 can generate an aerosol without combustion when heated.

Referring to FIG. 3A, the aerosol generating article 200 may include a first portion 210, a second portion 220, a third portion 230, and a fourth portion 240. Specifically, the first portion 210, the second portion 220, the third portion 230, and the fourth portion 240 may each include an aerosol generating element, a tobacco element, a cooling element, and a filter element. In one example, the first portion 210 includes an aerosol-generating material, the second portion 220 includes a tobacco material and a humectant, and the third portion 230 cools the airflow passing through the first portion 210 and the second portion 220. The fourth portion 240 may include a filter material. The fourth portion 240 is also a filter 240f containing the tobacco material 10 described above.

Referring to FIG. 3A, the first part 210, the second part 220, the third part 230, and the fourth part 240 may be sequentially arranged in the longitudinal direction of the aerosol-generating article 200. Here, the longitudinal direction of the aerosol-generating article 200 is also the direction in which the length of the aerosol-generating article 200 extends. For example, the longitudinal direction of aerosol generating article 200 is also the direction from first section 210 to fourth section 240. As a result, the aerosol generated in at least one of the first part 210 and the second part 220 passes through the third part 230 and the fourth part 240 in order, so that the smoker can remove the aerosol from the fourth part 240. can be inhaled.

First portion 210 may include an aerosol generating element. It may also contain other additives such as flavoring agents, humectants and/or organic acids. The first portion 210 may also include a scented liquid such as menthol or a humectant. Here, the aerosol generating element may include, for example, 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 and may include a variety of types of aerosol generating elements.

The first portion 210 can include an aerosol-generating substrate impregnated with an aerosol-generating element. Examples of aerosol-generating substrates include crimped sheets, and the aerosol-generating elements can be included in the first portion 210 impregnated with the crimped sheets. Additionally, other additives such as flavoring agents, humectants, and/or organic acids and perfuming liquids may be included in the first portion 210 while being absorbed into the crimped sheet.

The crimped sheet is also a sheet made of a polymeric material. For example, the polymer material may include at least one of paper, cellulose acetate, lyocell, and polylactic acid. For example, the crimped sheet is also a paper sheet that does not generate any off-odor even when heated to high temperatures. However, it is not limited thereto.

The first portion 210 extends approximately 7 mm to 20 mm from the end of the aerosol generating article 200, and the second portion 220 extends approximately 7 mm to 20 mm from the end of the first portion 210. However, the present disclosure is not limited to such numerical ranges, and the length of the first portion 210 or the second portion 220 may vary depending on the embodiment.

Second portion 220 may include tobacco elements. Tobacco elements are also tobacco substances in various forms. For example, the tobacco element may have the form of shredded tobacco, tobacco particles, tobacco sheets, tobacco beads, tobacco granules, tobacco powder or tobacco extract. The tobacco material can also include, for example, tobacco leaves, tobacco veins, puffed tobacco, cut tobacco, small pieces cut from reconstituted tobacco sheets, and/or reconstituted tobacco.

The third portion 230 may cool the airflow passing through the first portion 210 and the second portion 220. The third portion 230 may be made of a polymeric material or a biodegradable polymeric material, and may have a cooling function. For example, the third portion 230 may be made of polylactic acid (PLA) fibers, but is not limited thereto. Alternatively, the third portion 230 may be made of a cellulose acetate filter with a plurality of holes formed therein. However, the third portion 230 is not limited to the above-mentioned example, and may be any material that performs the function of cooling the aerosol without limitation. For example, the third portion 230 may be a hollow tube filter or a paper tube.

The fourth portion 240 is also a filter 240f containing the tobacco material 10 described above. That is, the above-described matters regarding the filter 240f including the tobacco material 10 may be applied to the filter included in the fourth portion 240 in the same manner.

As mentioned above, the fourth portion 240 may include a filter element. For example, the fourth portion 240 is also a cellulose acetate filter. On the other hand, the shape of the fourth portion 240 is not limited. For example, the fourth portion 240 may be a cylindrical rod or a tubular rod having a hollow interior. Further, the fourth portion 240 is also a recessed rod. If the fourth portion 240 is composed of a plurality of segments, at least one of the plurality of segments may be formed into a different shape.

The fourth portion 240 may be made to generate flavor. For example, a perfumed liquid may be sprayed onto the fourth part 240, and a separate fiber coated with the perfumed liquid may be inserted into the fourth part 240.

Aerosol generating article 200 may include a wrapper 250 surrounding at least a portion of first to fourth portions 210 to 240. For example, the wrapper 250 may surround all of the first portion 210 through the fourth portion 240 of the aerosol generating article 200. Wrapper 250 may be located at the outermost portion of aerosol generating article 200 . Wrapper 250 may be a single wrapper or a combination of multiple wrappers.

FIG. 3B is a diagram illustrating an example of an aerosol-generating article 200 according to another embodiment. The aerosol generating article may also be, for example, a combustible cigarette.

Referring to FIG. 3B, the aerosol generating article 200 can include a second portion 220 and a fourth portion 240. The second portion 220 may include a tobacco element and the fourth portion 240 may include a filter element. Regarding the second portion 220 and the fourth portion 240, the same or similar description given above regarding FIG. 3A may be applied.

The second portion 220 includes a tobacco element, which is also a particular form of tobacco material. The second portion 220 can be ignited and burned by the user.

Fourth portion 240 may include a filter element. Further, the fourth portion 240 is also a filter 240f containing the tobacco material 10 described above. That is, the above-described matters regarding the filter 240f including the tobacco material 10 may be applied to the filter included in the fourth portion 240 in the same manner.

Aerosol generating article 200 can include a wrapper 250 surrounding at least a portion of second portion 210 and fourth portion 240. Regarding wrapper 250, the same or similar description given above with respect to FIG. 3A may apply.

FIG. 4 is a flowchart of a method of manufacturing tobacco material according to one embodiment. Referring to FIG. 4, the method for manufacturing tobacco material may include a first step (S110) and a second step (S120).

The first step (S110) is also a step of manufacturing the core 11 using the first composition containing the flavoring substance. The first composition may include tobacco powder, water and flavoring material. Specifically, the first composition comprises 90% to 99% volume percent of flavoring material, 0.5% to 5% v/v of tobacco material, and 0.5% to 5% v/v of water. may include. For example, the first composition is also a tobacco paste that includes a flavoring agent.

The second step (S120) is also a step of forming the shell 12 surrounding at least a portion of the core 11. Shell 12 may be formed using the second composition. The second composition may include about 10% to 20% tobacco powder, about 40% to 60% water, and about 30% to 40% ethanol. For example, the second composition is also a tobacco paste. The second composition contains ethanol, which can shorten the drying time of the formed shell and adjust the hardness and roughness of the shell, unlike the first composition. Ethanol also has the effect of sterilizing the shell forming the outside of the tobacco material and eliminating off-flavors.

The first step (S110) and the second step (S120) will be described in more detail with reference to FIGS. 5A and 5B below.

FIG. 5A is a diagram illustrating a first step (S110) of a method for manufacturing tobacco material according to an embodiment.

Referring to FIG. 5A, the tobacco material production apparatus 20 is also a fluidized bed reactor. The fluidized bed reactor may include a storage section 21 , a supply section 22 and a chamber 23 . The storage section 21 can store the first composition A1. The supply unit 22 can supply the first composition A1 from the storage unit 21 to the chamber 23. Chamber 23 is also where the first composition A1 is formed into the core 11 of tobacco material. The chamber 23 may include an inlet 24 through which air is introduced from the outside.

The first step (S110) may include moving the first composition A1 from the storage section 21 to the supply section 22. Thereby, the first composition A1 can be introduced into the chamber 23 from the supply section 22.

Specifically, the first step (S110) includes injecting the first composition A1 into a fluidized bed reactor at a temperature of about 30° C. to 60° C. and under a pressure of about 1.5 bar or less. The method may include growing A1 and obtaining core 11 from the grown first composition A1.

Physical properties such as the size, shape, viscosity, specific gravity, and surface roughness of the core 11 may be determined by the temperature and pressure conditions of the first step (S110). When the temperature and pressure conditions in the numerical ranges described above are satisfied, a core 11 having appropriate physical properties can be formed.

External air may be introduced into the chamber 23 from the outside through the inlet 24 . The external air entering the chamber 23 forms a flow of the first composition A1 within the chamber 23, whereby the first composition A1 grows by coagulating and agglomerating into the core 11 of tobacco material. can be formed.

FIG. 5B is a diagram illustrating a second step (S120) of a method for manufacturing tobacco material according to an embodiment. Regarding the tobacco material manufacturing apparatus 20, what has been described above with respect to FIG. 5A may be applied in the same or similar manner.

Referring to FIG. 5B, in the second step (S120), the core 11 obtained in the first step (S110) is placed in the chamber 23, and the second composition A2 is introduced into the chamber 23 from the supply section 22. sell.

Specifically, the second step (S120) is a step of positioning the core 11 in a fluidized bed reactor at a temperature of about 50° C. to 90° C. and a pressure of about 1.5 bar or less; The method may include spraying the second composition A2 and coating the surface of the core 11 with the second composition A2 to obtain the tobacco material 10 (ie, the core 11 coated with the second composition A2).

The temperature and pressure conditions of the second step (S120) may determine physical properties such as the size, shape, viscosity, specific gravity, and surface roughness of the shell 12 to be formed. When the temperature and pressure within the numerical ranges described above are satisfied, the shell 12 having appropriate physical properties can be formed.

In one example, the first composition A1 may be grown at a lower temperature in the first step (S110) than the second composition A2 in the second step (S120). Since the first composition A1 contains flavoring substances, it is also advantageous for it to be grown at a lower temperature than the second composition A2 to improve the flavor retention and flavor development properties of the tobacco material.

External air may be introduced into the chamber 23 from the outside through the inlet 24 . The external air flowing into the chamber 23 forms a flow of the core 11 and the second composition A2 in the chamber 23, so that the second composition A2 is condensed and aggregated on the surface of the core 11 and becomes the core 11. A shell 12 may be formed that surrounds at least a portion of.

Accordingly, the tobacco material 10 including the core 11 and the shell 12 surrounding at least a portion of the core 11 can be manufactured through the first step (S110) and the second step (S120). According to the method for manufacturing the tobacco material 10 according to the embodiment, the tobacco material 10 can be manufactured through a simple process using a manufacturing device such as a fluidized bed reactor, and is suitable for mass production.

A person having ordinary knowledge in the technical field related to this embodiment can understand that the embodiment can be implemented in a modified form without departing from the essential characteristics described above. Therefore, the disclosed method must be considered in a descriptive rather than a restrictive light. The scope of the present disclosure is indicated in the claims rather than the foregoing description, and all differences that come within the scope of equivalency are to be construed as being included in the present disclosure.

Claims (12)

a core comprising a first tobacco mixture;
a shell surrounding at least a portion of the core and comprising a second tobacco mixture;
the first tobacco mixture includes first tobacco particles and a flavoring substance;
the second tobacco mixture includes second tobacco particles;
The shell is a tobacco material having a surface roughness (Ra) of about 5.0 to 10.0. 2. The tobacco material of claim 1, wherein the first tobacco mixture includes 90% or more of the flavoring substance, based on the total weight of the first tobacco mixture. The core has a size of about 30 mesh to 50 mesh,
The tobacco material of claim 1, wherein the tobacco material has a size of about 18 mesh to 25 mesh. 2. The tobacco material of claim 1, wherein the tobacco material has a hardness of 90% or more. The tobacco material of claim 1, wherein the tobacco material comprises about 5.0% to 8.0% water by weight, based on the total weight of the tobacco material. A filter included in an aerosol-generating article, the filter comprising:
A filter comprising a tobacco material according to claim 1. a first filter section including a first filter element;
a flavoring portion comprising a tobacco substance according to claim 1;
further comprising a second filter section including a second filter element;
The filter according to claim 6, wherein the first filter part, the flavor part, and the second filter part are sequentially arranged with respect to a longitudinal direction of the filter. a first step of manufacturing a core using a first composition comprising a flavoring substance;
forming a shell surrounding at least a portion of the core. 5. The first step is to grow the first composition by injecting the first composition into a fluidized bed reactor at a temperature of about 30° C. to 60° C. and a pressure of 1.5 bar or less. 8. A method for producing a tobacco material according to 8. The first composition comprises about 99% v/v to 99% v/v of the flavoring agent, about 0.5% v/v to 5% v/v of tobacco powder, and about 0.5% v/v to water. 9. A method for producing a tobacco material according to claim 8, comprising 5% v/v. The second stage is
positioning the core within a fluidized bed reactor;
injecting a second composition into the fluidized bed reactor at a temperature of about 50°C to 90°C and a pressure of less than 1.5 bar to coat the surface of the core with the second composition. , a method for producing a tobacco material according to claim 8. 10. The production of tobacco material according to claim 9, wherein the second composition comprises about 10% to 20% by weight of tobacco powder, about 40% to 60% by weight of water, and about 30% to 40% by weight of ethanol. Method.