KR20220139734A - Tobacco material, method for producing the tobacco material, filter comprising the tobacco material and aerosol generating article comprising the filter - Google Patents

Abstract

The embodiments of the present invention relate to a tobacco material, which includes a core including a first tobacco mixture, and a shell surrounding at least a portion of the core and including a second tobacco mixture, wherein the first tobacco mixture includes first tobacco particles and a flavor substance, the second tobacco mixture includes second tobacco particles, and the shell has a surface roughness (Ra) of about 5.0 to about 10.0. Accordingly, different flavors can be provided to a user at the beginning of smoking and at the end of smoking.

Description

TOBACCO MATERIAL, METHOD FOR PRODUCING THE TOBACCO MATERIAL, FILTER COMPRISING THE TOBACCO MATERIAL AND AEROSOL GENERATING ARTICLE COMPRISING THE FILTER

Embodiments relate to tobacco material, a method of making the tobacco material, a filter comprising the tobacco material, and an aerosol-generating article comprising the filter.

In recent years, there has been an increasing demand for alternatives to aerosol-generating articles. For example, there is a growing demand for devices that generate an aerosol as the aerosol-generating material in an aerosol-generating article is heated rather than a method of burning an aerosol-generating article (eg, a cigarette) to generate an aerosol.

SUMMARY OF THE INVENTION A problem to be solved by the embodiments is to provide a tobacco material capable of providing different flavors to a user at the beginning of smoking and at the end of smoking, and a method of manufacturing the same.

The problems to be solved through the embodiments are not limited to the above-mentioned problems, and the problems not mentioned can be clearly understood by those of ordinary skill in the art to which the embodiments belong from the present specification and the accompanying drawings. will be.

As a technical means for achieving the above-mentioned technical problem, one embodiment includes a core comprising 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: A tobacco material comprising first tobacco particles and a flavor material, wherein the second tobacco mixture comprises second tobacco particles, and wherein the shell has a surface roughness (Ra) of between 5.0 and 10.0.

Other embodiments provide a filter for inclusion in an aerosol-generating article, the filter comprising the tobacco material.

Still other embodiments include an aerosol-generating article comprising the filter.

Still other embodiments provide a method of making a tobacco material comprising a first step of manufacturing a core using a first composition comprising a flavor material and a second step of forming a shell on the core surrounding at least a portion of the core. to provide.

Means for solving the problems are not limited to the above, and may include all matters that can be inferred by those skilled in the art throughout the present specification.

Tobacco material according to embodiments may be applied to a filter of an aerosol-generating article to provide a user with different flavors at the beginning and end of smoking. In addition, it has the effect of appropriately controlling the timing, transfer rate, and transfer rate of the flavor substance.

In addition, according to the manufacturing method of the tobacco material according to the embodiments, the tobacco material can be manufactured through a simple process, it is suitable for mass production.

Effects of the embodiments are not limited to the above, and may include all effects inferred from the configuration to be described later.

1 schematically shows a cross-section of a tobacco material according to an embodiment;
Fig. 2a schematically shows a filter comprising tobacco material according to an embodiment;
Fig. 2b schematically shows a filter comprising tobacco material according to another embodiment;
3A is a diagram illustrating an example of an aerosol-generating article according to an embodiment.
3B is a diagram illustrating an example of an aerosol-generating article according to another embodiment.
4 is a flowchart of a method of manufacturing a tobacco material according to an embodiment.
5A is a diagram illustrating a first step of a method for manufacturing a tobacco material according to an embodiment.
5B is a diagram illustrating a second step of a method for manufacturing a tobacco material according to an embodiment.

Terms used in the embodiments are selected as currently widely used general terms as possible while considering the functions in the embodiments, but this may vary depending on the intention or precedent of a person skilled in the art, the emergence of new technology, etc. . In addition, in a specific case, there is a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the corresponding embodiments. Therefore, the terms used in the present embodiments should be defined based on the meaning of the term and the overall contents of the present embodiments, rather than the simple name of the term.

In the entire specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated. In addition, terms such as “-unit” and “-module” described in the specification mean a unit that processes at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software.

Also, as used herein, terms including an ordinal number such as “first” or “second” may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

Throughout the specification, "aerosol-generating article" means an article used for smoking. For example, the aerosol-generating article may be a regular combustion cigarette used in a manner that is ignited and combusted, or it may be a heated cigarette used in a manner that is heated by an aerosol-generating device. As another example, the aerosol-generating article may be an article that is used in such a way that the liquid contained in the cartridge is heated.

Throughout the specification, “lengthwise 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 the aerosol-generating device.

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

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

Throughout the specification, "tobacco particle" refers to the particulate form of an ingredient derived from a tobacco plant. For example, the tobacco particles may be tobacco grains or tobacco powder.

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

Throughout the specification, "filter element" means an element comprising a filtering material. For example, the filter element may comprise a plurality of fiber strands.

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

Hereinafter, with reference to the accompanying drawings, the embodiments of the present disclosure will be described in detail so that those of ordinary skill in the art to which the present disclosure pertains can easily implement them. However, the present disclosure may be implemented in several different forms and is not limited to the embodiments described herein.

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

1 schematically shows a cross-section of a tobacco material 10 according to an embodiment.

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

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

The core 11 may comprise a first tobacco mixture. The first tobacco mixture may include first tobacco particles and a flavor material.

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

The first tobacco particles may include various types of tobacco powder. The first tobacco particles may include, for example, tobacco powder of at least one of xanth, burry, hwa-gun, yang-gun, and shade-dry.

A flavoring substance may be a substance that gives off a specific odor. For example, flavoring substances include cinnamon, sage, herbs, chamomile, reeds, chamomile, lavender, bergamot, lemon, orange, cinnamon, jasmine, ginger, vanilla, spearmint, peppermint, acacia, coffee, celery, sandalwood, cocoa. It may contain plant fragrances, such as.

As another example, the flavoring material may include an animal flavoring such as musk, ambergris, civet, castrium, and the like.

As another example, the flavoring material may be an alcohol compound such as menthol, geraniol, linalol, anethol, eugenol, or the like. In addition, the flavoring material may be an aldehyde compound such as vanillin, benzaldehyde, anisaldehyde, and the like. In addition, the flavoring material may be an ester compound such as isoamyl acetate, linaryl acetate, isoamyl propionate, linaryl butyrate, and the like. The flavoring substance may preferably be menthol.

The shell 12 may include a second tobacco mixture. The second tobacco mixture may include second tobacco particles. For the second tobacco particles, the same or similar description of the above-described first tobacco particles may be applied.

The second tobacco mixture may be, for example, a tobacco paste comprising second tobacco particles. The second tobacco mixture may have an appropriate viscosity by being formed using a solvent such as water and/or ethanol. Even after the solvent has been removed, the second tobacco mixture may retain moisture. Details of the process for preparing the second tobacco mixture will be described later.

Tobacco material 10 according to one embodiment may be applied to a filter of an aerosol-generating article to provide a user with different flavors at the beginning and end of smoking. When an aerosol of about 40° C. or higher is continuously delivered to the filter during smoking, fine pores are formed in the shell 12 of the tobacco material 10 included in the filter. Accordingly, the flavor material contained in the core 11 may leak from the core 11 and be delivered to the user. That is, the flavor material 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, and is formed in the shell 12 in the latter half of smoking. By passing through the hole, it is possible to provide the user with different flavors at the beginning of smoking and at the end of smoking.

On the other hand, in the case of conventional aerosol-generating articles comprising highly volatile flavor substances (eg, menthol), the majority of the total flavor substances contained in the early smoking period are generally migrated, and the migration rate tends to decrease sharply in the latter part of smoking. have On the other hand, when the tobacco material 10 according to the embodiment is applied, the timing, transfer rate and transfer rate of the flavor material contained in the core 11 by controlling physical properties such as the thickness, viscosity, and roughness of the shell 12 , etc. has the effect of being able to properly control it.

Here, the temporal length of the early part of the entire smoking section, for example, about one-half of the smoking section, corresponds to the 'early smoking period', and the remaining temporal length corresponds to the 'late smoking period'. have.

The shell 12 may have a surface roughness Ra of 5.0 to 10.0. Referring to FIG. 1 , the tobacco material 10 of the shell 12 may have an atypical shape that does not have a uniform shape, and may have a relatively high surface roughness. As will be described later, the tobacco material 10 according to an embodiment may be disposed in a form embedded between acetate fibers of a filter for an aerosol-generating article. Here, the surface roughness of the shell 12 is related to the total amount of tobacco material 10 that can be embedded between the acetate fibers. When the surface roughness of the shell 12 is less than 5.0, it is difficult to fix the position of the tobacco material 10 between the acetate fibers due to low surface friction, and it is difficult to apply a large amount of the tobacco material 10 into the filter. When the surface roughness of the shell 12 exceeds 10.0, when a large amount of tobacco material 10 is placed between the acetate fibers due to excessively high surface friction, a problem in which the acetate fibers are broken may occur.

Tobacco material 10 may have the shape of a sphere as a whole. Since the core 11 has a spherical shape, the shell 12 formed around the core 11 may also have a spherical shape, but is not limited thereto. As described above, the shell 12 may have a rather rough surface.

The first tobacco mixture may include at least about 90% by weight of the flavor material based on the total weight of the first tobacco mixture. When the first tobacco mixture contains about 90% by weight or more of the flavor material, the flavor of the flavor material emitted from the core 11 may be completely provided without being diluted by other components. In addition, when substances other than the flavor substances are added in an excessive amount, the volatility of the flavor substances may decrease, so that flavor delivery may not be smooth. In terms of improving the delivery power of the flavor material, the first tobacco mixture may include about 95% by weight or more of the flavor material based on the total weight of the first tobacco mixture.

The core 11 may have a density of about 0.5 to about 0.7 g/cc. Preferably, the core 11 may have a specific gravity of about 0.55 to about 0.65 g/cc.

Referring to FIG. 1 , the core 11 may have a size of about 30 to about 50 mesh, and the tobacco material 10 may have a size of about 18 to about 25 mesh. That is, the core 11 may have a diameter d1 of about 0.297 to about 0.595 mm, and the tobacco material 10 may have a diameter d2 of about 0.7 to about 1 mm. When the core 11 and the tobacco material 10 have the above size range, minute holes are not formed in the shell 12 during smoking at the beginning of smoking, but can be appropriately adjusted so that they are formed from the second half of smoking, and the timing of the second half of smoking During the period, the flavor can be discharged uniformly.

When the tobacco material 10 has a size of less than about 18 mesh (that is, when it has a diameter d2 greater than about 1 mm), it is difficult to form fine holes in the shell 12 due to the thick shell 12 thickness. The release of the late flavor substance can be difficult. When the tobacco material 10 has a size greater than about 25 mesh (ie, has a diameter d2 less than about 0.7 mm), the thickness of the shell 12 is thin and the flavor may be released at an unintended early stage. .

In addition, when the core 11 has a size of less than about 30 mesh (that is, when it has a diameter d1 greater than about 0.595 mm), the transfer amount of flavor gradually increases over time to provide a uniform flavor. none. When the core 11 has a size greater than about 50 mesh (ie, a diameter d2 of less than about 0.297 mm), the content of flavor substances is small, so that the transfer amount of flavor at the smoking end point may be drastically reduced.

Tobacco material 10 may have a hardness of about 90% or greater. Specifically, the tobacco material 100 may have a hardness of about 95% to about 99.9%. The “hardness of the tobacco material” refers to a degree of resistance to pressure applied in a direction perpendicular to the tobacco material 10 as a physical property related to elasticity and recovery. "Hardness of tobacco substances" is measured using a hardness meter, and is calculated through the following formula.

Hardness (%) = [D-a] / D*100

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

When the tobacco material 10 has a hardness of less than about 90%, in the manufacturing process of a filter comprising the tobacco material 10, the tobacco material 10 may not maintain its shape and may be crumbled, and the shell 12 may be It may be damaged to expose the core 11 to the outside. Also, as the flavor material migrates from the beginning of smoking, it may not be able to provide a different flavor at the beginning and end of smoking.

Tobacco material 10 may comprise from about 5.0 to about 8.0 weight percent of moisture, based on the total weight of tobacco material 10 . Moisture contained in the tobacco material 10 absorbs heat applied during smoking, thereby contributing to the formation of fine pores in the shell 12 . When the tobacco material 10 contains less than about 5.0% by weight of moisture based on the total weight of the tobacco material 10, a large number of fine holes are not formed in the shell 12, so that the transfer amount of the flavor material of the core 11 is reduced. can do. When the tobacco material 10 contains moisture in excess of about 8.0% by weight based on the total weight of the tobacco material 10, the tobacco material 10 cannot maintain its shape due to excessive moisture content, or at the beginning of smoking. Excessive porosity in the shell 12 may result in migration of flavor substances at an earlier time than intended.

Meanwhile, the core 11 may have moisture in an amount of about 8.0 to about 15.0% by weight based on the total weight of the core 11 . Since the core 11 contains moisture in the above-described numerical range, the core 11 may have improved at least one property of fragrance retention and fragrance expression. In addition, since the moisture content of the core 11 is higher than the moisture content of the shell 12 , the tobacco material 10 may be excellent in hardness, flavor retention, and flavor expression.

Tobacco material 10 may have a density greater than or equal to about 0.6 g/cc. Preferably, the tobacco material 10 may have a specific gravity of about 0.7 g/cc or greater.

A filter according to another embodiment is a filter included in an aerosol-generating article, and provides a filter comprising the tobacco material 10 described above.

FIG. 2a schematically shows a filter 240f comprising tobacco material 10 according to an embodiment.

Referring to FIG. 2A , the filter 240f according to an embodiment may be disposed in a form in which a plurality of tobacco substances 10 are embedded between filter elements. The filter element may be a cellulose acetate filter. The cellulose acetate filter may include a fiber bundle in which a plurality of cellulose acetate fiber strands are aggregated. That is, the plurality of tobacco substances 10 included in the filter 240f according to an embodiment may be disposed in a form embedded between the plurality of cellulose acetate fibers.

The shape of the filter element is not limited. For example, the filter element may be a cylindrical rod, or a tubular rod comprising a hollow therein. Also, the filter element may be a recess type rod. If the filter element is composed of a plurality of segments, at least one of the plurality of segments may be manufactured in a different shape.

FIG. 2b schematically shows a filter 240f comprising tobacco material 10 according to another embodiment.

Referring to FIG. 2B , the filter 240f may include a first filter unit 241 , a flavor unit 242 , and a second filter unit 243 . Specifically, the first filter unit 241 , the flavor unit 242 , and the second filter unit 243 may include a first filter element, a tobacco material 10 and a second filter element, respectively. The first filter unit 241 , the flavor unit 242 , and the second filter unit 243 may be arranged in order based on the longitudinal direction of the filter 240f. Here, the longitudinal direction of the filter 240f may be a direction in which the length of the filter 240f is extended.

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

The flavor part 242 is located between the first filter part 241 and the second filter part 243, and includes a tubular filter element having a hollow therein and a plurality of tobacco substances 10 inside the hollow. It may be in a form including

Alternatively, flavor portion 242 may include only tobacco material 10 and no filter element. Here, the flavor part 242 may have a form in which a plurality of tobacco substances 10 are positioned therein, and surrounded by a wrapper that wraps the filter 240f.

The filter 240f according to FIGS. 2a and 2b has micropores in the shell 12 surrounding the core 11 of the tobacco material 10 contained in the filter 240f by a high-temperature aerosol delivered to the user during smoking. This can be formed, and the flavor material contained in the core 11 can be delivered to the user. That is, in the filter 240f, the flavor material contained in the core 11 of the tobacco material 10 is blocked by the shell 12 surrounding the core 11, so that it is not transferred at the beginning of smoking, and the shell ( 12), it is possible to provide different flavors to the user at the beginning of smoking and at the end of smoking.

3A is a diagram illustrating an example of an aerosol-generating article 200 according to an embodiment. The aerosol-generating article 200 according to one embodiment may comprise a filter 240f comprising the tobacco material 10 described above. The aerosol generating article 200 may be heated without burning to generate an aerosol.

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. have. 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, and the third portion 230 may include the first portion 210 . and cooling the airflow passing through the second portion 220 , and the fourth portion 240 may include a filter material. The fourth portion 240 may be a filter 240f comprising 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 are sequentially arranged in the longitudinal direction of the aerosol-generating article 200 . can be sorted. Here, the longitudinal direction of the aerosol-generating article 200 may be a direction in which the length of the aerosol-generating article 200 extends. For example, the longitudinal direction of the aerosol-generating article 200 may be a direction from the first portion 210 to the fourth portion 240 . Accordingly, the aerosol generated from at least one of the first portion 210 and the second portion 220 is generated by the first portion 210 , the second portion 220 , the third portion 230 , and the fourth portion ( 240 in order to form an airflow, thereby allowing the smoker to inhale the aerosol from the fourth portion 240 .

The first portion 210 may include an aerosol generating element. It may also contain other additive substances such as flavoring agents, wetting agents and/or organic acids, and may contain flavoring agents such as menthol or humectants. Here, the aerosol generating component 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 to the above-described examples, and the present disclosure may include all of various types of aerosol generating elements widely known in the art.

The first portion 210 may comprise an aerosol-generating substrate impregnated with an aerosol-generating element. An example of an aerosol-generating substrate may include a crimped sheet, and the aerosol-generating element may be included in the first portion 210 impregnated in the crimped sheet. In addition, flavoring agents, wetting agents and/or other additives such as organic acids and flavoring agents may be included in the first portion 210 in a state of being absorbed into the crimped sheet.

The crimped sheet may be a sheet made of a polymer material. For example, the polymer 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 generate off-flavor due to heat even when heated to a high temperature. However, the present invention is not limited thereto.

The first portion 210 may extend from about 7 to about 20 mm from the distal end of the aerosol-generating article 200 , and the second portion 220 may extend from about 7 to about 20 mm from the end of the first portion 210 . It can be extended to a point of 20 mm. However, it is not necessarily limited to this numerical range, and the length to which each of the first part 210 and the second part 220 extend may be appropriately adjusted within a range that can be easily changed by a person skilled in the art.

The second portion 220 may comprise a tobacco element. The tobacco component may be a specific type of tobacco material. For example, the tobacco component may be in the form of tobacco cut filler, tobacco particles, tobacco sheets, tobacco beads, tobacco granules, tobacco powder or tobacco extract. In addition, the tobacco material may include, for example, one or more of tobacco leaves, tobacco flanks, expanded tobacco, cut cut filler, leaf cut filler, and reconstituted tobacco.

The third portion 230 may cool the airflow passing through the first portion 210 and the second portion 220 . The third part 230 may be made of a polymer material or a biodegradable polymer material, and may have a cooling function. For example, the third portion 230 may be made of polylactic acid (PLA) fiber, but is not limited thereto. Alternatively, the third part 230 may be made of a cellulose acetate filter having a plurality of holes. However, the third part 230 is not limited to the above-described example, and the material performing the function of cooling the aerosol may correspond to this without limitation. For example, the third part 230 may be a tube filter or a paper tube including a hollow.

The fourth portion 240 may be a filter 240f comprising the tobacco material 10 described above. That is, as for the filter included in the fourth part 240 , the above-described filter 240f including the tobacco material 10 may be applied in the same manner.

As mentioned 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 part 240 is not limited. For example, the fourth part 240 may be a cylindrical rod, or a tubular rod including a hollow therein. Also, the fourth part 240 may be a recess type rod. If the fourth part 240 is composed of a plurality of segments, at least one of the plurality of segments may be manufactured in a different shape.

The fourth portion 240 may be manufactured to generate flavor. As an example, the flavoring liquid may be injected into the fourth part 240 , and a separate fiber to which the flavoring liquid is applied may be inserted into the fourth part 240 .

The aerosol-generating article 200 may include a wrapper 250 surrounding at least a portion of the first portion 210 to the fourth portion 240 . Further, the aerosol-generating article 200 may include a wrapper 250 surrounding all of the first portion 210 to the fourth portion 240 . The wrapper 250 may be positioned on the outermost side of the aerosol-generating article 200 , and the wrapper 250 may be a single wrapper, but may be a combination of a plurality of wrappers.

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

Referring to FIG. 3B , the aerosol-generating article 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 same or similar descriptions described above with respect to FIG. 3A may be applied.

The second portion 220 may include a tobacco element, which may be a specific type of tobacco material. The second part 220 may be ignited and combusted by a user.

The fourth portion 240 may include a filter element. The fourth portion 240 may also be a filter 240f comprising the tobacco material 10 described above. That is, the filter included in the fourth part 240 may be equally applied to the filter 240f including the step material 10 described above.

The aerosol generating article 200 may include a wrapper 250 surrounding at least a portion of the second portion 210 and the fourth portion 240 . For the wrapper 250 , the same or similar description described above with respect to FIG. 3A may be applied.

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

The first step ( S110 ) may be a step of preparing the core 11 using a first composition including a flavor material. The first composition may include tobacco powder, water and flavoring substances. Specifically, the first composition may comprise 90 to 99% by volume of flavor material, 0.5 to 5% by volume of tobacco material, and 0.5 to 5% by volume of water. For example, the first composition may be a tobacco paste containing flavoring substances.

The second step ( S120 ) may be a step of forming the shell 12 surrounding at least a portion of the core 11 on the core 11 . The shell 12 may be formed from the second composition. The second composition may include 10 to 20% by weight of tobacco powder, 40 to 60% by weight of water, and 30 to 40% by weight of ethanol. For example, the second composition may be a tobacco paste. Unlike the first composition, the second composition includes ethanol, and the added ethanol has the effect of reducing the drying time of the formed shell and controlling the hardness and roughness of the shell. Ethanol also has the effect of sterilizing and removing odors of the shell forming the exterior of the tobacco material.

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

Figure 5a is a view showing a first step (S110) of the method for manufacturing a tobacco material according to an embodiment.

Referring to FIG. 5A , the apparatus 20 for producing tobacco material may be a fluidized bed reactor. The fluidized bed reactor may include a storage unit 21 , a supply unit 22 , and a chamber 23 . The storage unit 21 may store the first composition (A1). The supply unit 22 may supply the first composition A1 from the storage unit 21 to the chamber 23 . The chamber 23 may be the place 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 unit 21 to the supply unit 22 . Accordingly, the first composition A1 may be introduced into the chamber 23 from the supply unit 22 .

Specifically, the first step (S110) is a step of growing the first composition (A1) by spraying the first composition (A1) into a fluidized bed reactor at a temperature of about 30 to about 60 °C, and a wind pressure of about 1.5 bar or less. and obtaining the core 11 from the grown first composition (A1).

Physical properties such as size, shape, viscosity, specific gravity, and surface roughness of the core 11 to be formed may be determined in the temperature condition and pressure condition of the first step S110 . When the temperature and wind pressure conditions in the above-described numerical range are satisfied, the core 11 having intended physical properties may be formed.

Outside air may be introduced from the outside of the chamber 23 to the inside through the inlet 24 . The external air introduced into the chamber 23 forms a flow of the first composition A1 in the chamber 23, the first composition A1 can grow by agglomeration, and the core 11 of the tobacco material can be formed.

Figure 5b is a view showing the second step (S120) of the manufacturing method of the tobacco material according to an embodiment. For the apparatus 20 for producing tobacco material, the same or similar descriptions described above with respect to FIG. 5A may be applied.

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 supplied from the supply unit 22 to the chamber 23 ) can be added.

Specifically, in the second step (S120), the core 11 is placed in a fluidized bed reactor at a temperature of about 50 to about 90° C. and a wind pressure of about 1.5 bar or less, and the second composition (A2) is sprayed to the core 11 ) coating the surface of the second composition (A2) and obtaining the tobacco material (10) from the coated core and the second composition (A2).

Physical properties such as size, shape, viscosity, specific gravity, and surface roughness of the shell 12 to be formed may be determined in the temperature and pressure conditions of the second step S120 . When the temperature and wind pressure conditions in the above-described numerical range are satisfied, the shell 12 having intended physical properties may be formed.

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) comprises flavoring substances, growing at a lower temperature than the second composition (A2) may be advantageous in improving the flavor retention and release properties of the tobacco material.

Outside air may be introduced from the outside of the chamber 23 to the inside through the inlet 24 . The external air introduced into the chamber 23 forms a flow of the core 11 and the second composition A2 in the chamber 23, and the second composition A2 is agglomerated on the surface of the core 11 and adheres to the core. A shell 12 surrounding at least a portion of (11) may be formed.

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 manufacturing method of the tobacco material 10 according to the embodiment, the tobacco material 10 can be manufactured through a simple process using a manufacturing apparatus such as a fluidized bed reactor, and is suitable for mass production.

A person of ordinary skill in the art related to this embodiment will understand that it can be implemented in a modified form within a range that does not deviate from the essential characteristics of the above description. Therefore, the disclosed methods are to be considered in an illustrative rather than a restrictive sense. The scope of the present disclosure is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present disclosure.

10: tobacco substance 11: core
12: shell
S110: first step S120: second step
20: device for manufacturing tobacco material 21: storage unit
22: supply unit 23: chamber
24: inlet
A1: first composition A2: second composition
200: aerosol generating article 210: first part
220: second part 230: third part
240: fourth part 250: wrapper
240f: filter 241: first filter unit
242: flavor unit 243: second filter unit

Claims (13)

a core comprising a first tobacco mixture; and
a shell surrounding at least a portion of the core and comprising a second tobacco mixture;
wherein the first tobacco mixture comprises first tobacco particles and a flavor material;
wherein the second tobacco mixture comprises second tobacco particles;
wherein the shell has a surface roughness (Ra) of 5.0 to 10.0. The method of claim 1,
wherein the first tobacco mixture comprises at least 90% by weight of the flavor material, based on the total weight of the first tobacco mixture. The method of claim 1,
The core has a size of 30 to 50 mesh,
The tobacco material has a size of 18 to 25 mesh. The method of claim 1,
wherein the tobacco material has a hardness of at least 90%. The method of claim 1,
The tobacco material comprises 5.0 to 8.0% by weight of moisture, based on the total weight of the tobacco material. A filter for inclusion in an aerosol-generating article, comprising:
A filter comprising the tobacco material according to claim 1 . 7. The method of claim 6,
The filter comprises: a first filter part comprising a first filter element;
A flavoring portion comprising tobacco material according to claim 1 ; and
a second filter unit including a second filter element; and
The first filter part, the flavor part and the second filter part are arranged in order based on the longitudinal direction of the filter, filter. An aerosol-generating article comprising a filter according to claim 6 . A first step of preparing a core using a first composition comprising a flavoring substance; and
A second step of forming on the core a shell surrounding at least a portion of the core; 10. The method of claim 9,
The first step comprises: growing the first composition by spraying the first composition into a fluidized bed reactor at a temperature of 30 to 60° C. and a wind pressure of 1.5 bar or less; and
obtaining the core from the grown first composition;
A method for producing a tobacco material comprising: 10. The method of claim 9,
The first composition comprises 90 to 99% by volume of the flavor material, 0.5 to 5% by volume of tobacco powder and 0.5 to 5% by volume of water. 10. The method of claim 9,
The second step may include coating the second composition on the surface of the core by placing the core in a fluidized bed reactor at a temperature of 50 to 90° C. and a wind pressure of 1.5 bar or less and spraying the second composition; and
obtaining tobacco material from the coated core and the second composition;
A method for producing a tobacco material comprising: 10. The method of claim 9,
The second composition comprises 10 to 20% by weight of tobacco powder, 40 to 60% by weight of water and 30 to 40% by weight of ethanol.

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