Tobacco material, a method for producing said tobacco material, a filter including said tobacco material, and an aerosol product including said filter

Abstract

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

Description

[Technical field]

[0001] The present invention relates to a tobacco material, a method for making the tobacco material, a filter including the tobacco material, and an aerosol product including the filter. [Background technology]

[0002] Recently, there has been an increasing demand for alternatives to traditional cigarettes, such as devices that generate aerosols by heating, without combustion, an aerosol-generating material within an aerosol-generating article (e.g., a cigarette). Summary of the Invention [Problem to be solved by the invention]

[0003] The problem to be solved by the present invention is to provide a tobacco substance and a manufacturing method thereof that can provide a user with different flavors during the initial and later stages of smoking.

[0004] The problems to be solved through the embodiments are not limited to those described above, and problems not mentioned will be clearly understood by a person having ordinary skill in the art to which the embodiments belong from this specification and the accompanying drawings. [Means for solving the problem]

[0005] As a technical means for achieving the above-mentioned technical problem, one embodiment provides a tobacco material comprising a core containing a first tobacco mixture and a shell surrounding at least a portion of the core and containing a second tobacco mixture, the first tobacco mixture comprising first tobacco particles and a flavoring substance, the second tobacco mixture comprising second tobacco particles, and the shell having a surface roughness (Ra) of 5.0 to 10.0.

[0006] Another embodiment provides a filter for inclusion in an aerosol product, the filter including said tobacco material.

[0007] Yet another embodiment includes an aerosol product including the filter.

[0008] Yet another embodiment provides a method for producing a tobacco material comprising a first step of producing a core with a first composition comprising a flavorant and a second step of forming a shell on the core surrounding at least a portion of the core.

[0009] The means for solving the problem are not limited to those described above, and may include any matter that can be inferred by a person of ordinary skill in the art from this disclosure. Effect of the Invention

[0010] The tobacco material according to the embodiment is applied to the filter of the aerosol product, and can provide a user with different flavors at the beginning and end of smoking. In addition, it has an effect of appropriately controlling the delivery time, transfer rate, and delivery rate of the flavor material.

[0011] Furthermore, according to the method for producing the tobacco material according to the embodiment, the tobacco material is produced through a simple process, which is suitable for mass production.

[0012] The effects of the embodiment are not limited to those described above, and may include any effects that can be inferred from the configurations described below. [Brief description of the drawings]

[0013] [Figure 1] 1 is a schematic diagram illustrating a cross-section of tobacco material according to one embodiment. [Figure 2A] 1 is a schematic diagram of a filter containing tobacco material according to one embodiment. [Figure 2B] 4 is a schematic diagram of a filter containing tobacco material according to another embodiment; [Figure 3A] 1 is a diagram illustrating an example of an aerosol product according to one embodiment. [Figure 3B] 1 is a diagram illustrating an example of an aerosol product according to another embodiment. [Figure 4]1 is a flow chart of a method for producing a tobacco material according to one embodiment. [Figure 5A] 1 is a diagram showing a first step of a method for producing a tobacco material according to one embodiment. [Figure 5B] 4 is a diagram showing a second step of a method for producing a tobacco material according to one embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] One embodiment provides a tobacco material comprising a core including a first tobacco mixture and a shell surrounding at least a portion of the core and including a second tobacco mixture, the first tobacco mixture including first tobacco particles and a flavoring material, and the second tobacco mixture including second tobacco particles, the shell having a surface roughness (Ra) of about 5.0 to 10.0.

[0015] The first tobacco mixture comprises at least 90% by weight of the flavorant, based on the total weight of the first tobacco mixture.

[0016] The core may have a size between about 30 mesh and 50 mesh, and the tobacco material may have a size between about 18 mesh and 25 mesh.

[0017] The tobacco material may have a hardness of 90% or greater.

[0018] The tobacco material may contain about 5.0% to 8.0% moisture by weight, based on the total weight of the tobacco material.

[0019] Another embodiment provides a filter comprising said tobacco material as a filter included in an aerosol product.

[0020] The filter may include a first filter section including a first filter element, a flavor section including the tobacco substance, and a second filter section including a second filter element, and the first filter section, the flavor section, and the second filter section may be aligned sequentially based on a longitudinal direction of the filter.

[0021] Yet another embodiment includes an aerosol product including the filter.

[0022] Yet another embodiment provides a method for producing a tobacco material comprising a first step of producing a core with a first composition comprising a flavorant, and a second step of forming a shell surrounding at least a portion of the core.

[0023] The first step may involve injecting the first composition into a fluidized bed reactor at a temperature of about 30° C. to 60° C. and at an atmospheric pressure of 1.5 bar or less to grow the first composition.

[0024] The first composition may comprise about 99% v / v to 99% v / v of the flavouring substance, about 0.5% v / v to 5% v / v of tobacco powder, and about 0.5% v / v to 5% v / v of water.

[0025] The second step may include placing 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 at an atmospheric pressure of 1.5 bar or less to coat a surface of the core with the second composition.

[0026] The second composition may comprise 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.

[0027] The terms used in the embodiments are currently widely used and common terms as much as possible, while taking into consideration the functions in the embodiments, but this may vary depending on the intentions of those skilled in the art, precedents, the emergence of new technologies, etc. In addition, in certain cases, the applicant may arbitrarily select terms, and in such cases, the meanings of the terms are described in detail in the description of the embodiments. Therefore, the terms used in the embodiments should be defined based on the meanings of the terms and the overall content of the present invention, rather than simply the names of the terms.

[0028] Throughout the specification, when a part "includes" a certain component, it means that it may further include other components, not excluding other components, unless otherwise specified. Furthermore, terms such as "... unit" and "... module" described in the specification mean a unit that processes at least one function or operation, and it may be realized by hardware or software, or a combination of hardware and software.

[0029] In addition, terms including ordinal numbers such as "first" or "second" are used in this specification to describe various components, but the components should not be limited by the terms. The terms are used only to distinguish one component from another component.

[0030] Throughout the specification, the term "aerosol-producing article" refers to an article used for smoking. For example, the aerosol-producing article may be a conventional combustion cigarette that is lit and burned, or a heated cigarette that is heated by an aerosol-generating device without burning. As another example, the aerosol-producing article may be an article used with a cartridge that contains a liquid that generates an aerosol when heated.

[0031] Throughout the specification, "longitudinal direction of the aerosol product article" means the direction in which the length of the aerosol product article extends or the direction in which the aerosol product article is inserted into an aerosol generating device.

[0032] Throughout the specification, "tobacco element" means an element that contains tobacco material.

[0033] Throughout the specification, "tobacco material" means any form of material that contains components derived from tobacco leaves.

[0034] Throughout the specification, "tobacco particles" refers to the particulate form of the components derived from the tobacco plant. For example, tobacco particles can be tobacco grains or tobacco powder.

[0035] Throughout the specification, "cooling element" refers to an element that cools a substance. For example, a cooling element may cool an aerosol generated from an aerosol-generating element or a tobacco element.

[0036] Throughout the specification, "filter element" means an element that includes a filtering material, for example, a filter element that includes a plurality of fiber strands.

[0037] Throughout the specification, "surface roughness" refers to the roughness of a surface of an object. For example, surface roughness can be expressed as the centerline average roughness (Ra) according to the KS B 0161 standard.

[0038] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present disclosure will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily implement the present disclosure. However, the present disclosure may be embodied in many different forms and is not limited to the embodiments described herein.

[0039] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0040] FIG. 1 is a schematic diagram illustrating a cross-section of tobacco material 10 according to one embodiment.

[0041] A tobacco material 10 according to one embodiment may include a core 11 including a first tobacco mixture, and a shell 12 surrounding at least a portion of the core 11 and including a second tobacco mixture.

[0042] 1, a tobacco substance 10 according to one embodiment includes a core 11 and a shell 12 surrounding at least a portion of the core 11. As such, a first tobacco mixture may be located in the center of the tobacco substance 10 and a second tobacco mixture may be located on the periphery thereof, i.e., the first tobacco mixture may be partially or wholly surrounded by the second tobacco mixture.

[0043] The core 11 may include a first tobacco mixture. The first tobacco mixture may include first tobacco particles and a flavoring substance.

[0044] The first tobacco particles may be, for example, tobacco powder having a size of about 0.1 to 0.3 mm, but is not limited thereto.

[0045] According to an embodiment, the first tobacco particles may include various types of tobacco powder, for example, at least one of flue-cured, burley, flue-cured, sun-cured, and air-cured tobacco powder.

[0046] Flavoring substances are also substances that give off a particular odor. For example, flavoring substances can include botanical flavors such as cinnamon, sage, herbs, chamomile, kudzu, sweet tea, lavender, bergamot, lemon, orange, cinnamon, jasmine, ginger, vanilla, spearmint, peppermint, acacia, coffee, celery, sandalwood, cocoa, etc.

[0047] As further examples, flavoring substances may include animal flavors such as musk, ambergris, civet, castoreum, and the like.

[0048] As another example, the flavoring material may be an alcohol compound such as menthol, geraniol, linalool, anethole, or eugenol. The flavoring material may also be an aldehyde compound such as vanillin, benzaldehyde, or anisaldehyde. The flavoring material may also be an ester compound such as isoamyl acetate, linalyl acetate, isoamyl propionate, or linalyl butyrate. Preferably, the flavoring material is menthol.

[0049] The shell 12 includes a second tobacco mixture. The second tobacco mixture includes second tobacco particles. For the second tobacco particles, the above description of the first tobacco particles may be applied in the same or similar manner.

[0050] The second tobacco mixture may be, for example, a tobacco paste containing the second tobacco particles. The second tobacco mixture may have a suitable viscosity by being formed using a solvent such as water and / or ethanol. After the solvent is removed, the second tobacco mixture may still have moisture. Details regarding the process of producing the second tobacco mixture are described below.

[0051] The tobacco material 10 according to an embodiment is applied to a filter of an aerosol product, and can provide a user with different flavors at the beginning and the latter part of smoking. When an aerosol of about 40° C. or more is continuously delivered to the filter during smoking, fine holes are formed in the shell 12 of the tobacco material 10 contained in the filter. As a result, the flavoring material contained in the core 11 can leak from the core 11 and be delivered to the user. That is, the flavoring material contained in the core 11 of the tobacco material 10 is blocked by the shell 12 surrounding the core 11 and is not delivered to the user at the beginning of smoking, but the flavoring material contained in the core 11 is delivered through the fine holes formed in the shell 12 at the latter part of smoking, thereby providing a user with different flavors at the beginning and the latter part of smoking.

[0052] Generally, in the case of a conventional aerosol product containing a highly volatile flavoring material (e.g., menthol), most of the flavoring material contained therein is transferred in the early stage of smoking, and the transfer rate tends to decrease sharply in the later stage of smoking. On the other hand, according to the embodiment, by adjusting the physical properties such as thickness, viscosity, and roughness of the shell 12, it is possible to appropriately adjust the transfer timing, transfer rate, and transfer rate of the flavoring material contained in the core 11.

[0053] Here, in the total smoking time, the portion that corresponds to the early part in time, for example, the length of time that corresponds to approximately the first half of the smoking time, corresponds to the "early smoking stage", and the remaining length of the smoking time corresponds to the "late smoking stage".

[0054] The shell 12 may have a surface roughness (Ra) of 5.0 to 10.0. Even if the tobacco material 10 illustrated in FIG. 1 is generally spherical, the tobacco material 10 of the shell 12 may have an irregular shape (i.e., the particle shape is not uniform) and may have a relatively high surface roughness. As described below, the tobacco material 10 according to one embodiment may be disposed in a form embedded between acetate fibers of a filter in an aerosol product. Here, the surface roughness of the shell 12 is related to the total amount of the tobacco material 10 embedded between the acetate fibers. If the surface roughness of the shell 12 is less than 5.0, the surface friction is low, so that 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 in the filter. If the surface roughness of the shell 12 exceeds 10.0, the acetate fibers may be damaged when a large amount of the tobacco material 10 is disposed between the acetate fibers due to an excessively high surface friction.

[0055] The tobacco material 10 may have a generally spherical shape. The core 11 and the shell 12 formed around the core 11 may have a spherical shape, but are not limited to such. As previously mentioned, the shell 12 may have a somewhat rough surface.

[0056] The first tobacco mixture may contain about 90% by weight or more of the flavoring material based on the total weight of the first tobacco mixture. That is, the weight of the flavoring material contained 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 material, the flavor of the flavoring material released from the core 11 may be fully provided without being diluted by other ingredients. In addition, when an excessive amount of a substance other than the flavoring material is added, the volatility of the flavoring material decreases and the flavor is not smoothly delivered. In terms of improving the delivery of the flavoring material, the first tobacco mixture may contain about 95% by weight or more of the flavoring material of the first tobacco mixture.

[0057] The core 11 may have a density of about 0.5 to 0.7 g / cc. Desirably, the core 11 may have a density of about 0.55 to 0.65 g / cc.

[0058] 1, the core 11 may have a size of about 30 to 50 mesh, and the tobacco material 10 may have a size of about 18 to 25 mesh. That is, the core 11 may have a diameter d1 of about 0.297 to 0.595 mm, and the tobacco material 10 may have a diameter d2 of about 0.7 to 1 mm. When the core 11 and the tobacco material 10 are within the above size ranges, minute holes begin to form in the shell 12 during the latter half of smoking, allowing the aroma during the latter half of smoking to be released evenly.

[0059] If the tobacco material 10 has a size less than about 18 mesh (i.e., a diameter d2 greater than about 1 mm), the thick shell 12 makes it difficult to form fine holes in the shell 12, making it difficult to release the flavoring substance in the latter stages of smoking. If the tobacco material 10 has a size greater than about 25 mesh (i.e., a diameter d2 less than about 0.7 mm), the thin shell 12 may cause the flavoring substance to be released too quickly.

[0060] Also, if the core 11 has a size less than about 30 mesh (i.e., has a diameter d1 greater than about 0.595 mm), the amount of flavor transfer increases gradually 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 material in the tobacco material 10 is very low, so the amount of flavor transfer may decrease rapidly as smoking progresses.

[0061] The tobacco material 10 may have a hardness of about 90% or more. Specifically, the tobacco material 100 may have a hardness of about 95% to 99.9%. "Hardness of a tobacco material" is a physical property related to elasticity and degree of recovery, and refers to the degree to which the tobacco material 10 resists pressure applied in a vertical direction. "Hardness of a tobacco material" is measured using a hardness tester and calculated according to the following formula.

[0062] Hardness (%)=[Da] / D*100

[0063] (D: diameter of tobacco material, a: distance (mm) that the tobacco material is pressed by a 300g weight)

[0064] 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 a filter containing the tobacco material 10 and may crumble, or the shell 12 may be damaged, exposing the core 11 to the outside. Also, the flavoring substance inside the core 11 may start to migrate from the early stage of smoking, making it impossible to provide other flavors in the later stages of smoking.

[0065] The tobacco substance 10 may contain moisture in the range of about 5.0% to 8.0% by weight based on the total weight of the tobacco substance 10. The moisture contained in the tobacco substance 10 absorbs heat applied during smoking, thereby contributing to the formation of fine holes in the shell 12. If the tobacco substance 10 contains moisture less than about 5.0% by weight based on the total weight of the tobacco substance 10, fine holes may not be sufficiently formed in the shell 12, and the amount of flavoring substance transferred from the core 11 may be reduced. If the tobacco substance 10 contains moisture in excess of about 8.0% by weight based on the total weight of the tobacco substance 10, the tobacco substance 10 may not be able to maintain its shape due to the excessive moisture content, or excessive holes may be formed in the shell 12 at the beginning of smoking. As a result, the flavoring substance may begin to transfer too quickly.

[0066] The core 11 may have a moisture content of about 8.0% to 15.0% by weight, based on the total weight of the core 11. When the core 11 contains moisture within the above-mentioned range, the core 11 may have improved at least one of aroma retention and aroma release. In addition, since the moisture content of the core 11 is higher than the moisture content of the shell 12, the tobacco material 10 has excellent hardness, aroma retention, and aroma release.

[0067] The tobacco material 10 may have a density of about 0.6 g / cc or greater. Desirably, the tobacco material 10 may have a density of about 0.7 g / cc or greater.

[0068] A filter is provided that includes the tobacco material 10 described above.

[0069] FIG. 2A is a schematic diagram of a filter 240f containing tobacco material 10 according to one embodiment.

[0070] 2A, the filter 240f according to one embodiment may be arranged in a form in which a plurality of tobacco materials 10 are embedded between filter elements. The filter elements may be cellulose acetate filters. The cellulose acetate filters may include fiber bundles that are a collection of a plurality of 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 a plurality of cellulose acetate fibers.

[0071] The shape of the filter element is not limited. For example, the filter element may be a cylindrical rod, a tubular rod with a hollow inside, or a recessed rod. If the filter element is made of multiple segments, at least one of the multiple segments may be made to have a different shape.

[0072] FIG. 2B is a schematic diagram of a filter 240f containing tobacco material 10 according to another embodiment.

[0073] 2B, the filter 240f may include a first filter portion 241, a flavor portion 242, and a second filter portion 243. Specifically, the first filter portion 241, the flavor portion 242, and the second filter portion 243 may include a first filter element, a tobacco substance 10, and a second filter element, respectively. The first filter portion 241, the flavor portion 242, and the second filter portion 243 may be aligned in sequence 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.

[0074] The first and second filter elements included in the first and second filter units 241 and 243 may be the same or different from each other. The same matters regarding the filter elements described above with reference to FIG. 2A may be applied to the first and second filter elements.

[0075] The flavor section 242 may be located between the first filter section 241 and the second filter section 243. The flavor section 242 may include a tubular filter element having a hollow space, and a plurality of tobacco materials 10 may be arranged in the hollow space.

[0076] Alternatively, the flavor portion 242 may include a tobacco material 10 without a filter element, where the flavor portion 242 may include a plurality of tobacco materials 10 therein and be surrounded by a wrapper of a filter 240f.

[0077] 2A and 2B, fine holes are formed in the shell 12 of the tobacco material 10 contained in the filter 240f by high-temperature aerosol transferred to the user during smoking, and the flavoring substance contained in the core 11 can be delivered to the user. That is, in the filter 240f, the flavoring substance contained in the core 11 of the tobacco material 10 is blocked by the shell 12 surrounding the core 11 and is not transferred in the early stage of smoking. As a result, the flavoring substance is transferred through the fine holes formed in the shell 12 in the latter stage of smoking, and different flavors can be provided to the user in the early and latter stages of smoking.

[0078] 3A is a diagram illustrating an example of an aerosol product 200 according to one embodiment. The aerosol product 200 according to one embodiment may include a filter 240f that includes the tobacco material 10 described above. The aerosol product 200 may generate an aerosol without combustion upon heating.

[0079] 3A, the aerosol product 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 include an aerosol generating element, a tobacco element, a cooling element, and a filter element, respectively. As an example, the first portion 210 may include an aerosol generating material, the second portion 220 may include a tobacco material and a humectant, the third portion 230 may cool the airflow passing through the first portion 210 and the second portion 220, and the fourth portion 240 may include a filter material. The fourth portion 240 may also be a filter 240f including the tobacco material 10 described above.

[0080] 3A, the first portion 210, the second portion 220, the third portion 230, and the fourth portion 240 may be sequentially aligned based on the longitudinal direction of the aerosol product 200. Here, the longitudinal direction of the aerosol product 200 is also the direction in which the length of the aerosol product 200 extends. For example, the longitudinal direction of the aerosol product 200 is also the direction from the first portion 210 to the fourth portion 240. As a result, the aerosol generated in at least one of the first portion 210 and the second portion 220 passes through the third portion 230 and the fourth portion 240 in sequence, and thus the smoker can inhale the aerosol from the fourth portion 240.

[0081] The first portion 210 may include an aerosol generating component. It may also include other additives such as flavoring agents, humectants, and / or organic acids. The first portion 210 may also include a flavoring liquid such as menthol or a moisturizer. Here, the aerosol generating component 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 and may include various types of aerosol generating components.

[0082] The first portion 210 may include an aerosol-generating substrate impregnated with an aerosol-generating component. An example of the aerosol-generating substrate is a crimped sheet, and the aerosol-generating component may be included in the first portion 210 in a state in which it is impregnated in the crimped sheet. In addition, other additives and flavoring liquids, such as flavoring agents, humectants, and / or organic acids, may be included in the first portion 210 in a state in which they are absorbed in the crimped sheet.

[0083] The crimped sheet may also be a sheet made of a polymeric material. For example, the polymeric material may include at least one of paper, cellulose acetate, lyocell, and polylactic acid. For example, the crimped sheet may be a paper sheet that does not emit an unpleasant odor even when heated to a high temperature, but is not limited thereto.

[0084] The first portion 210 extends from the end of the aerosol product article 200 by approximately 7 mm to 20 mm, and the second portion 220 extends from the end of the first portion 210 by approximately 7 mm to 20 mm. However, the present disclosure is not limited to such numerical ranges, and the length of the first portion 210 or second portion 220 may vary depending on the embodiment.

[0085] The second portion 220 may include tobacco elements. The tobacco elements may be tobacco material in various forms. For example, the tobacco elements may be in the form of cut tobacco, tobacco particles, tobacco sheets, tobacco beads, tobacco granules, tobacco powder, or tobacco extracts. The tobacco material may also include, for example, tobacco leaves, tobacco veins, expanded tobacco, cut cut tobacco, small pieces cut from reconstituted tobacco sheets, and / or reconstituted tobacco.

[0086] The third part 230 may cool the airflow passing through the first part 210 and the second part 220. The third part 230 may be made of a polymeric material or a biodegradable polymeric material and may have a cooling function. For example, the third part 230 may be made of, but is not limited to, polylactic acid (PLA) fiber. Alternatively, the third part 230 may be made of a cellulose acetate filter having a plurality of holes formed therein. However, the third part 230 is not limited to the above examples, and may be any material that performs the function of cooling the aerosol without limitation. For example, the third part 230 may be a tube filter or a paper tube including a hollow space.

[0087] The fourth portion 240 is also a filter 240f containing the tobacco material 10 described above. That is, the same matters regarding the filter 240f containing the tobacco material 10 described above can be applied to the filter included in the fourth portion 240.

[0088] As described above, the fourth portion 240 may include a filter element. For example, the fourth portion 240 may be a cellulose acetate filter. Meanwhile, the shape of the fourth portion 240 is not limited. For example, the fourth portion 240 may be a cylindrical rod, a tubular rod including a hollow inside, or a recessed rod. If the fourth portion 240 is composed of multiple segments, at least one of the multiple segments may be made to have a different shape.

[0089] The fourth portion 240 may be manufactured to generate a flavor. For example, a flavoring liquid may be sprayed into the fourth portion 240, and separate fibers coated with the flavoring liquid may be inserted into the fourth portion 240.

[0090] The aerosol product 200 may include a wrapper 250 that surrounds at least a portion of the first portion 210 through the fourth portion 240. For example, the wrapper 250 may surround all of the first portion 210 through the fourth portion 240 of the aerosol product 200. The wrapper 250 may be located at the outermost portion of the aerosol product 200. The wrapper 250 may be a single wrapper or a combination of multiple wrappers.

[0091] 3B is a diagram illustrating an example of an aerosol product 200 according to another embodiment. The aerosol product may be, for example, a combustible cigarette.

[0092] 3B, the aerosol product 200 may 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. For the second portion 220 and the fourth portion 240, the description above for FIG. 3A may be applied in the same or similar manner.

[0093] The second portion 220 includes a tobacco element, which is also a particular form of tobacco substance, and can be lit and burned by a user.

[0094] The fourth portion 240 may include a filter element. The fourth portion 240 may also be the filter 240f containing the tobacco material 10 described above. That is, the same matters regarding the filter 240f containing the tobacco material 10 described above may be applied to the filter included in the fourth portion 240.

[0095] The aerosol production article 200 may include a wrapper 250 that surrounds at least a portion of the second portion 210 and the fourth portion 240. For the wrapper 250, the description given above with respect to Figure 3A may apply in the same or similar manner.

[0096] 4 is a flow chart of a method for producing a tobacco material according to an embodiment. Referring to FIG 4, the method for producing a tobacco material may include a first step (S110) and a second step (S120).

[0097] The first step (S110) is also a step of manufacturing the core 11 using a first composition containing a flavoring substance. The first composition may contain tobacco powder, water, and a flavoring substance. Specifically, the first composition may contain 90% to 99% v / v (volume percent) of the flavoring substance, 0.5% to 5% v / v of the tobacco substance, and 0.5% to 5% v / v of water. For example, the first composition may be a tobacco paste containing a flavoring substance.

[0098] The second step (S120) is also a step of forming a shell 12 surrounding at least a portion of the core 11. The shell 12 may be formed using a 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. For example, the second composition may be a tobacco paste. The second composition includes ethanol, which is different from the first composition in that it can shorten the drying time of the formed shell and adjust the hardness and roughness of the shell. In addition, the ethanol has a sterilizing and odor removing effect on the shell that forms the exterior of the tobacco material.

[0099] The first step (S110) and the second step (S120) will be described in further detail below with reference to FIGS. 5A and 5B.

[0100] FIG. 5A is a diagram showing a first step (S110) of a method for producing a tobacco material according to one embodiment.

[0101] 5A, the tobacco material manufacturing 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 may store the first composition A1. The supply section 22 may supply the first composition A1 from the storage section 21 to the chamber 23. The chamber 23 is also where the first composition A1 is formed into the tobacco material core 11. The chamber 23 may include an inlet 24 through which air is introduced from the outside.

[0102] The first step (S110) may include moving the first composition A1 from the storage unit 21 to the supply unit 22. Thus, the first composition A1 may be introduced from the supply unit 22 into the chamber 23.

[0103] Specifically, the first step (S110) may include a step of growing the first composition A1 by injecting the first composition A1 into a fluidized bed reactor at a temperature of about 30°C to 60°C and an atmospheric pressure of about 1.5 bar or less, and a step of obtaining a core 11 from the grown first composition A1.

[0104] The physical properties of the core 11, such as the size, shape, viscosity, specific gravity, and surface roughness, may be determined by the temperature and pressure conditions in the first step (S110). When the temperature and pressure conditions are within the above-mentioned ranges, the core 11 having appropriate physical properties may be formed.

[0105] External air may flow from the outside to the inside of the chamber 23 through the inlet 24. The external air flowing into the chamber 23 forms a flow of the first composition A1 within the chamber 23, and as a result, the first composition A1 may grow by solidifying and coagulating to form the core 11 of the tobacco material.

[0106] 5B is a diagram showing a second step (S120) of the tobacco material manufacturing method according to an embodiment. For the tobacco material manufacturing apparatus 20, the contents described above with reference to FIG. 5A may be applied in the same or similar manner.

[0107] Referring to FIG. 5B, in the second step (S120), the core 11 obtained in the first step (S110) is placed in a chamber 23, and a second composition A2 is introduced from a supply unit 22 into the chamber 23.

[0108] Specifically, the second step (S120) may include the steps of placing the core 11 in a fluidized bed reactor under conditions of a temperature of about 50°C to 90°C and an atmospheric pressure of about 1.5 bar or less, and injecting the second composition A2 into the fluidized bed reactor to coat the surface of the core 11 with the second composition A2 to obtain the tobacco material 10 (i.e., the core 11 coated with the second composition A2).

[0109] The temperature and pressure conditions in the second step (S120) may determine the size, shape, viscosity, specific gravity, surface roughness, and other physical properties of the formed shell 12. When the temperature and pressure are within the above-mentioned ranges, the shell 12 may have appropriate physical properties.

[0110] In one embodiment, the first composition A1 in the first step (S110) may be grown at a lower temperature than the second composition A2 in the second step (S120). Since the first composition A1 contains a flavoring material, growing it at a lower temperature than the second composition A2 is also advantageous for improving the flavor retention and flavor development of the tobacco material.

[0111] External air may flow from the outside to the inside of the chamber 23 through the inlet 24. The external air flowing into the chamber 23 creates a flow of the core 11 and the second composition A2 within the chamber 23, and as a result, the second composition A2 may coagulate and aggregate on the surface of the core 11 to form a shell 12 surrounding at least a portion of the core 11.

[0112] As a result, through the first step (S110) and the second step (S120), it is possible to produce a tobacco material 10 including a core 11 and a shell 12 surrounding at least a portion of the core 11. According to the method for producing the tobacco material 10 according to the embodiment, the tobacco material 10 can be produced through a simple process using a production device such as a fluidized bed reactor, which is suitable for mass production.

[0113] A person having ordinary skill in the art to which the present embodiment pertains can understand that the present invention can be embodied in modified forms without departing from the essential characteristics of the above description. Therefore, the disclosed method should be considered in an explanatory rather than restrictive manner. The scope of the present disclosure is defined in the claims, not the above description, and all differences within the scope of the equivalents should be interpreted as being included in the present disclosure.

Claims

1. 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 comprises first tobacco particles and a flavoring material; the second tobacco mixture comprises second tobacco particles; The shell of the tobacco material has a surface roughness (Ra) of about 5.0 to 10.

0.

2. 2. The tobacco material of claim 1, wherein the first tobacco mixture comprises at least 90% by weight of the flavoring material, based on the total weight of the first tobacco mixture.

3. the core having a size of about 30 mesh to 50 mesh; 10. The tobacco material of claim 1, wherein the tobacco material has a size between about 18 mesh and 25 mesh.

4. 10. The tobacco material of claim 1, wherein the tobacco material has a hardness of 90% or greater.

5. 10. The tobacco material of claim 1, wherein the tobacco material comprises about 5.0% to 8.0% moisture by weight, based on the total weight of the tobacco material.

6. A filter included in an aerosol product, comprising: A filter comprising the tobacco material of claim 1.

7. a first filter portion including a first filter element; A flavor portion comprising the tobacco material of claim 1; a second filter portion including a second filter element, The filter according to claim 6 , wherein the first filter section, the flavor section, and the second filter section are aligned in sequence based on a longitudinal direction of the filter.

8. A first step of preparing a core using a first composition comprising a flavoring substance; a second step of forming a shell surrounding at least a portion of the core; The method of producing a tobacco material, wherein the shell has a surface roughness (Ra) of about 5.0 to 10.

0.

9. 9. The method of claim 8, wherein the first step comprises injecting the first composition into a fluidized bed reactor at a temperature of about 30° C. to 60° C. and at an atmospheric pressure of 1.5 bar or less to grow the first composition.

10. 9. The method of claim 8, wherein the first composition comprises about 90% v / v to 99% v / v of the flavoring material, about 0.5% v / v to 5% v / v of tobacco powder, and about 0.5% v / v to 5% v / v of water.

11. The second stage comprises: positioning the 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 at an atmospheric pressure of 1.5 bar or less to coat the surface of the core with the second composition.

12. 12. The method of claim 11, wherein the second composition comprises about 10% to 20% tobacco powder, about 40% to 60% water, and about 30% to 40% ethanol, by weight.

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