Filter wrapper for aerosol-generating article, and filter for aerosol-generating article, comprising same

Abstract

The filter wrapper for an aerosol-generating article according to an embodiment comprises a paper layer and a coating layer disposed on at least one surface of the paper layer, wherein the coating layer may comprise at least one polymer resin selected from the group consisting of an acrylic resin and a polyvinyl alcohol-based resin.

Description

Filter wrapper for aerosol-generating articles and filter for aerosol-generating articles including the same

[0001] The embodiments relate to a filter wrapper for an aerosol-generating article and a filter for an aerosol-generating article comprising the same, and more specifically, to a filter wrapper for an aerosol-generating article having excellent adhesion to a filter tow while having oil resistance and a filter for an aerosol-generating article comprising the same.

[0002] There is an increasing demand for filters used in cigarettes (or 'aerosol-generating articles') that additionally contain flavoring substances other than the filter material. The flavoring substances can add flavor to the aerosol passing through the filter. The flavoring substances can be sprayed onto the filter material in a liquid state or contained inside a capsule and embedded within the filter material.

[0003] Generally, flavoring substances contain oil-soluble materials, which can lead to the problem of the filter wrapper being contaminated by the flavoring substances. For example, in the case of a filter containing a capsule, the fragrance liquid located inside the capsule (e.g., a liquid containing the flavoring substance) may be released upon capsule rupture. The fragrance liquid can reach the filter wrapper due to the pressure applied inside the capsule upon rupture. Since the fragrance liquid contains oil as a major component, it is required that the filter wrapper possess oil resistance to prevent contamination of the filter wrapper by the fragrance liquid.

[0004] The problems to be solved by the embodiments of the present disclosure are not limited to those described above, and problems not mentioned will be clearly understood by those skilled in the art from the present specification and the accompanying drawings.

[0005] A filter wrapper for an aerosol-generating article according to one embodiment comprises a paper layer and a coating layer disposed on at least one surface of the paper layer, and the coating layer may comprise one or more polymer resins selected from the group consisting of acrylic resins and polyvinyl alcohol-based resins.

[0006] A filter for an aerosol-generating article according to one embodiment may include a filter tow comprising filter fibers and a filter wrapper surrounding the filter tow.

[0007] According to various embodiments of the present disclosure, a filter wrapper suitable for application to aerosol-generating articles exposed to high temperatures during use can be provided by including a polymer resin with excellent thermal stability as a coating layer.

[0008] In addition, the filter wrapper for an aerosol-generating article according to various embodiments can prevent contamination based on oil resistance and can also form a filter with excellent adhesion to the filter tow.

[0009] The effects of the embodiments are not limited to the effects described above, and unmentioned effects will be clearly understood by those skilled in the art from this specification and the accompanying drawings.

[0010] FIG. 1 illustrates an aerosol-generating article according to one embodiment.

[0011] FIG. 2 illustrates an aerosol-generating article according to one embodiment.

[0012] FIG. 3 illustrates a filter wrapper for an aerosol-generating article according to one embodiment.

[0013] FIG. 4 illustrates a filter for an aerosol-generating article according to one embodiment.

[0014] FIG. 5 is a block diagram of an aerosol generating device according to one embodiment.

[0015] A filter wrapper for an aerosol-generating article according to one embodiment comprises a paper layer and a coating layer disposed on at least one surface of the paper layer, and the coating layer may comprise one or more polymer resins selected from the group consisting of acrylic resins and polyvinyl alcohol-based resins.

[0016] The above acrylic resin may contain 10% to 40% by weight of solids and 30% to 60% by weight of an ester compound.

[0017] The above polyvinyl alcohol-based resin may contain 1% to 10% by weight of solids.

[0018] The weight of the coating layer may be 3.5% to 9% of the weight of the paper layer.

[0019] The basis weight of the above paper layer is 25 g / m² 2 Up to 90 g / m² 2 And, the thickness can be 30 μm to 70 μm.

[0020] The size of the above paper layer may be 3 sec to 5 sec.

[0021] The air permeability of the above paper layer may be 130 sec or more.

[0022] The above filter wrapper may have an induction resistance of 6 to 11 in a test according to the Tappi T559 standard.

[0023] The size of the filter wrapper above may be 40 sec to 70 sec.

[0024] The product of the induction resistance in the test according to the Tappi T559 standard of the filter wrapper and the size (sec) of the filter wrapper may be 250 or more.

[0025] A filter for an aerosol-generating article according to one embodiment may include a filter tow comprising filter fibers and a filter wrapper surrounding the filter tow.

[0026] The filter for the aerosol generating article above is placed inside the filter tow and may further include a capsule containing a fragrance liquid.

[0027] The filter tow and the filter wrapper can be attached by a hydrophilic adhesive.

[0028] The above hydrophilic adhesive may be a hot melt adhesive comprising ethylene-vinyl acetate copolymer (EVA).

[0029] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components are assigned the same reference numeral regardless of the drawing symbols, and redundant descriptions thereof will be omitted. In relation to the description of the drawings, similar drawing symbols may be used for similar or related components.

[0030] The suffixes "module" and "unit" for components used in the following description are assigned or used interchangeably solely for the sake of ease of drafting the specification, and do not inherently possess distinct meanings or roles. Meanwhile, the suffixes "module" or "unit" may include units implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. "Module" or "unit" may be a component formed as a whole, or the smallest unit of said component or a part thereof that performs one or more functions. For example, "module" or "unit" may be implemented in the form of an application-specific integrated circuit (ASIC).

[0031] In addition, when describing the embodiments disclosed in this specification, if it is determined that a detailed description of related prior art may obscure the essence of the embodiments disclosed in this specification, such detailed description is omitted. Furthermore, the attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings; it should be understood that the drawings include all modifications, equivalents, and substitutions that fall within the concept and technical scope of this disclosure.

[0032] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0033] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0034] A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0035] Embodiments of the present disclosure may be implemented as software comprising one or more instructions stored in a storage medium (e.g., memory (17)) readable by a machine (e.g., aerosol generating device (1)). For example, a processor (e.g., control unit (12)) of the machine (e.g., aerosol generating device (1)) may call at least one of the one or more instructions stored in the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. The storage medium readable by the machine may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' simply means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily.

[0036] In the present disclosure, the direction of the aerosol generating device (1) can be defined based on an orthogonal coordinate system. In the orthogonal coordinate system, the x-axis direction can be defined as the left-right direction of the aerosol generating device (1). The y-axis direction can be defined as the front-back direction of the aerosol generating device (1). The z-axis direction can be defined as the up-down direction of the aerosol generating device (1).

[0037] FIG. 1 is a drawing illustrating an aerosol-generating article (2) according to one embodiment.

[0038] Referring to FIG. 1, the aerosol generating article (2) may include an aerosol generating rod (21) and a filter rod (22). Additionally, the aerosol generating article (2) may be packaged by at least one wrapper (24).

[0039] The aerosol generating rod (21) may include tobacco material and / or non-tobacco material. Tobacco material and non-tobacco material may contain nicotine and may be heated to produce an aerosol containing nicotine vapor. Tobacco material and non-tobacco material may have various shapes. For example, tobacco material and non-tobacco material may have at least one form among sheet, citric acid, strand, particle, bead, granule, powder, and extract, but are not limited thereto.

[0040] Tobacco materials may be manufactured using leaf tobacco raw materials and / or reconstituted tobacco raw materials. Leaf tobacco raw materials may include at least one of yellow tobacco, Burley tobacco, and Oriental tobacco, but are not limited thereto. Reconstituted tobacco raw materials may refer to tobacco raw materials regenerated by utilizing tobacco by-products. For example, reconstituted tobacco raw materials may include leaf-shaped leaves.

[0041] Non-tobacco substances may be substances manufactured without using tobacco raw materials. For example, non-tobacco substances may be manufactured using cellulose, nicotine, organic acids, etc. Furthermore, non-tobacco substances may be manufactured using cellulose, nicotine salts, etc., but are not limited thereto.

[0042] Tobacco substances and non-tobacco substances may include aerosol-generating substances. For example, aerosol-generating substances may include at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol, but are not limited thereto. Additionally, tobacco substances may include other additive substances such as flavoring agents and organic acids.

[0043] The aerosol generating rod (21) may include at least one plate leaf sheet. The plate leaf sheet may include at least one of a slurry-type plate leaf and a paper-type plate leaf. Slurry-type plate leaves and paper-type plate leaves may be distinguished according to the manufacturing method. At least one plate leaf sheet may be arranged to extend along the longitudinal direction of the aerosol generating rod (21). However, it is not limited thereto, and the aerosol generating rod (21) may include a plurality of plate leaf strips manufactured by cutting or slicing the plate leaf sheet. Additionally, the plate leaf sheet may be crimped to include wrinkles, and the aerosol generating rod (21) may include a crimped plate leaf sheet or a plurality of plate leaf strips manufactured from a crimped plate leaf sheet.

[0044] The aerosol generating rod (21) may include at least one of puffed leaf and puffed main vein. The puffed leaf and puffed main vein may be manufactured by puffing leaf tobacco raw material and main vein, which is a byproduct of leaf tobacco raw material.

[0045] The filter rod (22) may include a plurality of segments. Referring to FIG. 1, the filter rod (22) may include a first segment (221), a second segment (222), and a third segment (223). The first segment (221), the second segment (222), and the third segment (223) may be arranged in order along the longitudinal direction of the aerosol generating article (2).

[0046] The first segment (221) can support the tobacco material contained in the aerosol generating rod (21). The first segment (221) can be positioned adjacent to the downstream end of the aerosol generating rod (21). The first segment (221) can prevent the tobacco material from being pushed downstream during the process in which the heater (18) of the aerosol generating device (1) is inserted into the interior of the aerosol generating rod (21) through the upstream end of the aerosol generating rod (21).

[0047] The first segment (221) may include a filter material. For example, the first segment (221) may include at least one filter material selected from paper, cellulose acetate, polylactic acid, polypropylene, and lyocell. The first segment (221) may be a cylindrical rod or a tube-shaped rod containing an internal hollow, but is not limited thereto.

[0048] The second segment (222) can cool the aerosol. The high-temperature aerosol generated in the aerosol generating rod (21) can be cooled as it passes through the second segment (222).

[0049] The second segment (222) may include a filter material. For example, the second segment (222) may include at least one filter material selected from paper, cellulose acetate, polylactic acid, polypropylene, and lyocell. The second segment (222) may be a cylindrical rod or a tube-shaped rod containing an internal hollow, but is not limited thereto. For example, the second segment (222) may be a paper tube formed of paper.

[0050] The first segment (221) and the second segment (222) may each be a tube-shaped rod containing an internal hollow. The diameter of the hollow of the second segment (222) may be larger than the diameter of the hollow of the first segment (221). Accordingly, the speed of the airflow moving from the first segment (221) toward the second segment (222) may be accelerated, and the aerosol may be effectively cooled.

[0051] The second segment (222) may include a cooling material. For example, the cooling material may include a polymer material having a cooling function. The polymer material having a cooling function may absorb heat from the aerosol when in contact with the high-temperature aerosol. The polymer material having a cooling function may include polylactic acid, but is not limited thereto. As another example, the second segment (222) is a tube-shaped rod including an internal hollow, and a polymer material having a cooling function may be applied to the surface of the internal hollow.

[0052] The second segment (222) may include at least one perforation (222P). The perforation (222P) may be formed along the circumferential direction of the second segment (222) to form one or more rows. External air may be introduced into the interior of the second segment (222) through the perforation (222P). The external air introduced into the interior of the second segment (222) may be mixed with the high-temperature aerosol generated from the aerosol generating rod (21) to cool the aerosol. The perforation (222P) may be exposed to the outside of the aerosol generating device (1) when the aerosol generating article (2) is inserted into the aerosol generating device (1).

[0053] The third segment (223) can filter some components contained in the aerosol passing through the third segment (223). The third segment (223) may include a filter material. For example, the third segment (223) may include at least one filter material among paper, cellulose acetate, polylactic acid, polypropylene, and lyocell. For example, the third segment (223) may be manufactured by adding a plasticizer (e.g., triacetin) to cellulose acetate tow.

[0054] The third segment (223) may be a cylindrical rod or a tube-shaped rod including an internal hollow, but the shape of the third segment (223) is not limited thereto.

[0055] The third segment (223) may add flavor to the aerosol passing through the third segment (223). For example, the third segment (223) may include a flavoring agent. The flavoring agent may be sprayed into the third segment (223) in a liquid state, but is not limited thereto.

[0056] The flavoring agent may include, but is not limited to, menthol. For example, the flavoring agent may include botanical flavorings such as cinnamon, sage, herbs, chamomile, kudzu, sweet potato, lavender, bergamot, lemon, orange, jasmine, ginger, vanilla, spearmint, peppermint, acacia, coffee, celery, sandalwood, and cocoa. As another example, the flavoring agent may include animal flavorings such as musk, ambergris, civet, and castrium.

[0057] Flavoring agents may be alcohol compounds such as geraniol, linalol, anethole, eugenol, etc. Flavoring agents may be aldehyde compounds such as vanillin, benzaldehyde, anisaldehyde, etc. Flavoring agents may be ester compounds such as isoamyl acetate, linalyl acetate, isoamyl propionate, linalyl butyrate, etc.

[0058] The third segment (223) may include at least one capsule (23). At least one capsule (23) may be embedded inside the filter material. The capsule (23) may generate flavor or aerosol. For example, the capsule (23) may be a structure in which a liquid containing a flavoring agent is surrounded by a film. The film of the capsule (23) may rupture due to external pressure to release the liquid contained within the film. The liquid released from the capsule (23) may be absorbed by the filter material of the third segment (223). The capsule (23) may have a spherical or cylindrical shape, but is not limited thereto.

[0059] The third segment (223) may include an adsorbent. The adsorbent may adsorb a specific substance in the gaseous phase. For example, the adsorbent may include at least one of activated carbon, zeolite, alumina, silica gel, and bentonite.

[0060] The aerosol generating article (2) may include a wrapper (24) that surrounds at least a portion of the aerosol generating rod (21) and / or at least a portion of the filter rod (22). The wrapper (24) may be composed of a single wrapper, or may be composed of a combination of multiple wrappers, such as a first wrapper (241), a second wrapper (242), a final wrapper (24F), and a tip paper (24T).

[0061] The wrapper (24) may include paper. For example, the wrapper (24) may include paper having a thickness of about 10 μm to about 150 μm and a basis weight of about 20 g / m2 to about 100 g / m2, but is not limited thereto. When the wrapper (24) is a combination of multiple wrappers, the thickness and basis weight of the paper included in the multiple wrappers may be the same or different.

[0062] The aerosol generating article (2) can be wrapped in multiple layers by two or more wrappers. For example, the aerosol generating rod (21) can be wrapped in a first wrapper (241), the filter rod (22) can be wrapped in a second wrapper (242), and both the aerosol generating rod (21) and the filter rod (22) can be re-wrapped in a final wrapper (24F).

[0063] The first wrapper (241) may surround the aerosol generating rod (21). The first wrapper (241) may include a thermal conductivity enhancing material. The thermal conductivity enhancing material may include, but is not limited to, a metal foil such as aluminum foil. The thermal conductivity enhancing material can evenly distribute the heat transferred to the aerosol generating rod (21) by improving the thermal conductivity of the first wrapper (241). For example, the first wrapper (241) may be a laminated sheet in which paper and metal foil are laminated. The first wrapper (241) may be a laminated sheet in which paper is placed on one side of the metal foil, or a laminated sheet in which paper is placed on both sides of the metal foil.

[0064] The second wrapper (242) may surround the filter rod (22). Referring to FIG. 1, the second wrapper (242) is shown to surround only the third segment (223) of the segments of the filter rod (22), but is not limited thereto. For example, the second wrapper (242) may surround the second segment (222) and the third segment (223), or may completely surround the filter rod (22). The aerosol generating article (2) may include separate wrappers that surround each of the first segment (221), the second segment (222), and the third segment (223).

[0065] The second wrapper (242) may be oil-resistant. As the second wrapper (242) is oil-resistant, the flavoring agent contained in the third segment (223) and / or capsule (23) may be prevented from leaking out of the aerosol-generating article (2). For example, the second wrapper (242) may include at least one of polyvinyl alcohol and silicone. The surface of the second wrapper (242) may be coated with an oil-resistant material.

[0066] The final wrapper (24F) can wrap the aerosol generating rod (21) and the filter rod (22) together. The final wrapper (24F) can protect the outer surface of the aerosol generating article (2) so that the aerosol generating article (2) can be smoothly inserted into the aerosol generating device (1).

[0067] The final wrapper (24F) may include at least one perforation (24FP). For example, the final wrapper (24F) may surround the second segment (222), and the perforation (24FP) of the final wrapper (24F) may be located at a position corresponding to the perforation (222P) of the second segment (222).

[0068] The wrapper (24) may include a tip paper (24T). The tip paper (24T) may surround a portion of the aerosol generating article (2) extending along the longitudinal direction of the aerosol generating article (2) from the downstream end of the aerosol generating article (2). For example, the tip paper (24T) may surround the entire third segment (223) and a portion of the second segment (222). The tip paper (24T) may come into contact with the user's bend during use of the aerosol generating article (2).

[0069] The tip paper (24T) may include at least one perforation (24TP). For example, the tip paper (24T) may surround the second segment (222), and the perforation (24TP) of the tip paper (24T) may be located at a position corresponding to the perforation (222P) of the second segment (222).

[0070] The outer surface of the tip paper (24T) may be coated with a substance such as a sweetener and a lip release agent. The sweetener may provide a sweet taste to the user. For example, the sweetener may include sucralose, citric acid, etc., but is not limited thereto. The lip release agent may allow the user's bulb to be easily separated after contact with the tip paper (24T). For example, the lip release agent may include at least one of nitrocellulose, ethyl acetate, polyamide, and isopropyl alcohol, but is not limited thereto.

[0071] A shear plug (not shown) can introduce outside air into the interior of the aerosol generating article (2). For example, an aerosol generated from the cartridge (19) of the aerosol generating device (1) can be introduced into the aerosol generating rod (21) through the shear plug.

[0072] The shear plug may be located on one side opposite to the filter rod (22) with respect to the aerosol generating rod (21). For example, the shear plug, the aerosol generating rod (21), and the filter rod (22) may be arranged in order along the longitudinal direction of the aerosol generating article (2). The shear plug can prevent the tobacco material of the aerosol generating rod (21) from escaping toward the upstream end of the aerosol generating rod (21).

[0073] The shear plug may include a filter material. For example, the shear plug may include at least one filter material selected from paper, cellulose acetate, polylactic acid, polypropylene, and lyocell. For example, the shear plug may be manufactured by adding a plasticizer (e.g., triacetin) to cellulose acetate tow.

[0074] The shear plug may be a tube-shaped rod containing a hollow inside. The aerosol generated in the cartridge (19) of the aerosol generating device (1) may flow into the aerosol generating rod (21) through the hollow of the shear plug. For example, the shear plug may include a hollow extending from the upstream end of the shear plug toward the downstream end. The cross-section of the hollow may have various shapes such as circular, elliptical, polygonal, cross-shaped, or Y-shaped, but is not limited thereto. As another example, the shear plug may be a cylindrical rod that does not contain a hollow.

[0075] A shear plug can add flavor to an aerosol passing through the shear plug. For example, the shear plug may contain a flavoring agent. The flavoring agent may be sprayed into the shear plug in a liquid state, but is not limited thereto.

[0076] The aerosol generating rod (21) may include a first aerosol generating rod and a second aerosol generating rod. The first aerosol generating rod and the second aerosol generating rod may be arranged in order along the longitudinal direction of the aerosol generating article (2). However, this is not limited thereto, and the arrangement order of the first aerosol generating rod and the second aerosol generating rod may be changed.

[0077] The first aerosol generating rod may be heated to generate an aerosol. The aerosol generated from the first aerosol generating rod may or may not contain nicotine. The first aerosol generating rod may include an aerosol generating material. For example, the aerosol generating material may include at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol, but is not limited thereto. Additionally, the first aerosol generating rod may include other additive materials such as flavoring agents and organic acids.

[0078] The first aerosol generating rod may include an aerosol generating substrate impregnated with a liquid aerosol generating material. The aerosol generating substrate may have a sheet shape. For example, the aerosol generating substrate may be wound to have wrinkles. The aerosol generating substrate in the shape of a wrinkled sheet may be included in the first aerosol generating rod in a wound state. The aerosol generating substrate may be wound around an axis extending along the longitudinal direction of the aerosol generating article (2), but is not limited thereto.

[0079] The aerosol generating substrate may include a polymer material. The polymer material may include at least one of paper, cellulose, cellulose acetate, lyocell, and polylactic acid. For example, the aerosol generating substrate may be a paper sheet that does not produce an off-odor due to heat even when heated to a high temperature.

[0080] The second aerosol generating rod may be heated to generate an aerosol containing nicotine vapor. For example, the second aerosol generating rod may contain tobacco material and / or non-tobacco material. Tobacco material and non-tobacco material may have various shapes. For example, tobacco material and non-tobacco material may have at least one form among sheets, corks, strands, particles, beads, granules, powders, and extracts, but are not limited thereto.

[0081] Tobacco materials may be manufactured using at least one of leaf tobacco raw materials and reconstituted tobacco raw materials. Leaf tobacco raw materials may include at least one of yellow tobacco, Burley tobacco, and Oriental tobacco, but are not limited thereto. Reconstituted tobacco raw materials may refer to tobacco raw materials regenerated by utilizing tobacco by-products. For example, reconstituted tobacco raw materials may include leaf-shaped leaves.

[0082] Non-tobacco substances may be substances manufactured without using tobacco raw materials. For example, non-tobacco substances may be manufactured using cellulose, nicotine, organic acids, etc. Furthermore, non-tobacco substances may be manufactured using cellulose, nicotine salts, etc., but are not limited thereto.

[0083] Tobacco substances and non-tobacco substances may include aerosol-generating substances. For example, aerosol-generating substances may include at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol, but are not limited thereto. Additionally, tobacco substances may include other additive substances such as flavoring agents and organic acids.

[0084] For example, the second aerosol generating load may include a plurality of tobacco leaves. The tobacco leaves may be manufactured according to a manufacturing method comprising the steps of: blending leaf tobacco raw materials; flavoring the blended leaf tobacco raw materials; and cutting the flavored leaf tobacco raw materials to produce tobacco leaves.

[0085] The step of blending tobacco leaf raw materials may involve mixing different types of tobacco leaf raw materials according to a predetermined ratio. For example, the step of blending tobacco leaf raw materials may involve blending yellow tobacco and Burley tobacco. However, this is not limited to this, and a single type of tobacco leaf raw material may also be used.

[0086] The flavoring treatment step can suppress the expression of irritation, unpleasant taste, etc., when smoking, and impart moisturizing properties, flavor retention properties, etc. to the tobacco sticks. The flavoring treatment may include the step of spraying a flavoring liquid onto the tobacco leaf raw material. The flavoring liquid may contain sugars (e.g., sugar, etc.), organic acids (e.g., citric acid, tartaric acid, etc.), aerosol-generating substances (e.g., glycerin, propylene glycol, etc.), flavoring agents (licorice extract, cocoa, etc.).

[0087] The second aerosol generating rod may include at least one plate leaf sheet. The plate leaf sheet may include at least one of a slurry-type plate leaf and a paper-type plate leaf. Slurry-type plate leaves and paper-type plate leaves may be distinguished according to the manufacturing method. At least one plate leaf sheet may be arranged to extend along the longitudinal direction of the second aerosol generating rod. However, it is not limited thereto, and the second aerosol generating rod may include a plurality of plate leaf strips manufactured by cutting or slicing the plate leaf sheet. Additionally, the plate leaf sheet may be crimped to include wrinkles, and the second aerosol generating rod may include the crimped plate leaf sheet or a plurality of plate leaf strips manufactured from the crimped plate leaf sheet.

[0088] The second aerosol generating rod may include at least one of puffed leaf and puffed main vein. The puffed leaf and puffed main vein may be manufactured by puffing leaf tobacco raw material and main vein, which is a byproduct of leaf tobacco raw material.

[0089] The second aerosol generating rod may include a plurality of tobacco granules. The tobacco granules may be particles having a diameter of about 100 μm to about 2,000 μm. For example, the tobacco granules may be particles having a diameter of about 200 μm to about 1,000 μm.

[0090] Tobacco granules can be manufactured by introducing a granule core into a fluidized bed reactor and injecting a tobacco mixture into the fluidized bed reactor. In the fluidized bed reactor, the tobacco mixture adheres to and aggregates on the surface of the granule core, and as the granule core grows in size, tobacco granules can be manufactured. The granule core may contain tobacco fines produced by crushing tobacco leaves, tobacco stems, etc. Here, the tobacco fines may be particles having a diameter of about 10 μm to about 80 μm. In addition, the tobacco mixture may be a mixture of tobacco raw materials and a solvent (e.g., water).

[0091] As another example, tobacco granules may be manufactured by wet-extruding a tobacco mixture of tobacco raw materials and a solvent, and then sphericalizing it. Here, water, alcohol (e.g., ethanol) may be used as the solvent, and additives such as flavoring agents, organic acids, and pH adjusters may be added.

[0092] A plurality of tobacco granules may be positioned between filter materials. The filter material may include at least one of paper, cellulose acetate, polylactic acid, polypropylene, and lyocell. For example, the second aerosol generating rod may include fibers of the filter material, and a plurality of tobacco granules may be uniformly dispersed between the fibers of the filter material.

[0093] Additionally, the filter material may include a sheet-like material. For example, the filter material may include a paper sheet. The paper sheet may be included in the second aerosol generating rod in a wound state. The paper sheet may be wound around an axis extending along the longitudinal direction of the aerosol generating article (2), but is not limited thereto. A plurality of tobacco granules may be uniformly dispersed within the wound paper sheet. The paper sheet may be a wound sheet with wrinkles.

[0094] The second aerosol generating rod may include an aerosol generating substrate impregnated with a nicotine liquid composition. The aerosol generating substrate may be applied in the same or similar manner as described above with respect to the first aerosol generating rod.

[0095] A nicotine liquid composition may contain nicotine. Nicotine may include freebase nicotine and nicotine salt. Freebase nicotine may refer to neutral nicotine to which no protons have been added. For example, if a base is added to a positively charged nicotine salt, the base is converted into a cation, and the nicotine salt can become freebase nicotine in a neutral state.

[0096] Nicotinic salts may contain acids. For example, nicotine salts may include at least one of acetic acid, benzoic acid, lactic acid, carbonic acid, citric acid, gallic acid, lauric acid, levulinic acid, malic acid, malonic acid, oxalic acid, oxaloacetic acid, palmitic acid, pyruvate, phosphoric acid, salicylan, sorbic acid, stearic acid, and tartaric acid.

[0097] The nicotine liquid composition may include an aerosol-generating substance. For example, the aerosol-generating substance may include at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol, but is not limited thereto. The nicotine liquid composition may include other additive substances such as flavoring agents and organic acids.

[0098] The nicotine liquid composition may contain about 0.1% by weight to about 5% by weight of nicotine based on the total weight of the nicotine liquid composition. For example, the nicotine liquid composition may contain about 0.5% by weight to about 3% by weight of nicotine based on the total weight of the nicotine liquid composition.

[0099] The nicotine liquid composition may be impregnated in an amount of about 0.05 g to about 5.0 g per 1 g of aerosol-generating substrate. For example, the nicotine liquid composition may be impregnated in an amount of about 0.1 g to about 2.0 g per 1 g of aerosol-generating substrate.

[0100] FIG. 2 is a drawing illustrating an aerosol-generating article according to one embodiment.

[0101] Referring to FIG. 2, the aerosol generating article (2) may include an aerosol generating rod (21) and a filter rod (22). Additionally, the aerosol generating article (2) may be wrapped by at least one wrapper (24). The aerosol generating article (2) illustrated in FIG. 2 may generate an aerosol by combustion.

[0102] The aerosol generating rod (21) may contain a tobacco material. The tobacco material contains nicotine and can be burned to produce an aerosol containing nicotine vapor. The aerosol generating rod (21) may be burned when the aerosol generating article (2) is used. For example, ignition may occur at the upstream end of the aerosol generating rod (21), and combustion may proceed in a direction from the upstream end of the aerosol generating rod (21) toward the downstream end.

[0103] Tobacco materials may have various shapes. For example, tobacco materials may have at least one form among sheets, corks, strands, particles, beads, granules, powders, and extracts, but are not limited thereto.

[0104] Tobacco material may be manufactured using at least one tobacco raw material selected from leaf tobacco raw material and reconstituted tobacco raw material. Leaf tobacco raw material may include at least one selected from yellow tobacco, Burley tobacco, and Oriental tobacco, but is not limited thereto. Reconstituted tobacco raw material may refer to tobacco raw material regenerated by utilizing tobacco by-products. For example, reconstituted tobacco raw material may include leaf tobacco.

[0105] Tobacco substances may include aerosol-generating substances. For example, aerosol-generating substances may include at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol, but are not limited thereto. Additionally, tobacco substances may include other additive substances such as flavoring agents and organic acids.

[0106] For example, the aerosol generating rod (21) may include a plurality of tobacco leaves. The tobacco leaves may be manufactured according to a manufacturing method comprising the steps of: mixing tobacco leaf raw materials; flavoring the mixed tobacco leaf raw materials; and cutting the flavored tobacco leaf raw materials to produce tobacco leaves.

[0107] The step of blending tobacco leaf raw materials may involve mixing different types of tobacco leaf raw materials according to a predetermined ratio. For example, the step of blending tobacco leaf raw materials may involve blending yellow tobacco and Burley tobacco. However, this is not limited to this, and a single type of tobacco leaf raw material may also be used.

[0108] The flavoring treatment step can suppress the expression of irritation, unpleasant taste, etc., when smoking, and impart moisturizing properties, flavor retention properties, etc. to the tobacco sticks. The flavoring treatment may include the step of spraying a flavoring liquid onto the tobacco leaf raw material. The flavoring liquid may contain sugars (e.g., sugar, etc.), organic acids (e.g., citric acid, tartaric acid, etc.), aerosol-generating substances (e.g., glycerin, propylene glycol, etc.), flavoring agents (licorice extract, cocoa, etc.).

[0109] A method for manufacturing tobacco sticks may include a toasting process. The toasting process may refer to a process of adding sugars and acids, etc., to tobacco leaf raw materials and inducing a thermal reaction at a high temperature to produce toasted leaves with improved flavor. The toasted leaves may be mixed in the step of blending tobacco leaf raw materials or the step of manufacturing tobacco sticks.

[0110] The toasting process may include a first toasting flavoring step, a toasting treatment step, and a second toasting flavoring step. For the first toasting flavoring step and the second toasting flavoring step, the aforementioned details regarding flavoring treatment may be applied in the same or similar ways. The toasting treatment step may include a drying step, a cooling step, and a moisture control step for the leaf tobacco raw material, and each step may be performed sequentially.

[0111] The aerosol generating rod (21) may include at least one plate leaf sheet. The plate leaf sheet may include at least one of a slurry-type plate leaf and a paper-type plate leaf. Slurry-type plate leaves and paper-type plate leaves may be distinguished according to the manufacturing method. At least one plate leaf sheet may be arranged to extend along the entire length of the aerosol generating rod (21). However, it is not limited thereto, and the aerosol generating rod (21) may include a plurality of plate leaf pieces manufactured by cutting or slicing the plate leaf sheet.

[0112] A slurry-type plate-shaped leaf sheet can be manufactured according to a manufacturing method comprising the steps of preparing a slurry containing tobacco raw materials, casting the slurry to form a sheet, and drying the sheet to manufacture a plate-shaped leaf sheet. The slurry may contain a mixture of tobacco raw materials, water, an aerosol-generating substance (e.g., glycerin, propylene glycol, etc.), a flavoring agent, and a binder (e.g., guar gum, xanthan gum, carboxymethyl cellulose, etc.). Here, the tobacco raw materials may be tobacco leaves, tobacco stems, and / or tobacco fines generated during tobacco processing. Additionally, natural pulp or cellulose may be added to the slurry, and one or more binders may be mixed and used. The manufactured plate-shaped leaf sheet may be wound to include folds.

[0113] A paper-type plate-shaped leaf sheet can be manufactured according to a manufacturing method comprising the steps of: preparing a slurry containing tobacco raw materials; extracting the slurry to separate water-soluble substances and fibrous substances; manufacturing a sheet-shaped base sheet using the fibrous substances; and applying a water-soluble substance to the base sheet and drying the moisture to manufacture a plate-shaped leaf sheet. Here, the fibrous substance may be refined to a state suitable for manufacturing the base sheet. Additionally, the water-soluble substance may be concentrated before being applied to the base sheet, and may be mixed with an aerosol-generating substance (e.g., glycerin, propylene glycol, etc.) and flavoring agents. The manufactured plate-shaped leaf sheet may be wound to include wrinkles.

[0114] The aerosol generating rod (21) may include at least one of puffed leaf and puffed main vein. The puffed leaf and puffed main vein may be manufactured by puffing leaf tobacco raw material and main vein, which is a byproduct of leaf tobacco raw material.

[0115] The filter rod (22) can filter some components contained in the aerosol passing through the filter rod (22). The filter rod (22) may include a filter material. For example, the filter rod (22) may include at least one filter material among paper, cellulose acetate, polylactic acid, polypropylene, and lyocell. For example, the filter rod (22) may be manufactured by adding a plasticizer (e.g., triacetin) to cellulose acetate tow.

[0116] The filter material may comprise a fibrous material with a denier per filament of about 1 to about 30 and a total denier of about 10,000 to about 200,000. For example, the filter material may comprise cellulose acetate tow with a denier per filament of about 2 to about 15 and a total denier of about 20,000 to about 100,000, but is not limited thereto.

[0117] The filter rod (22) may be a cylindrical rod or a tube-shaped rod containing an internal hollow, but the shape of the filter rod (22) is not limited thereto. For example, the filter rod (22) may include a hollow with an open downstream end.

[0118] The filter rod (22) may include a plurality of segments. The plurality of segments may be arranged in order along the longitudinal direction of the aerosol generating article (2). The plurality of segments may have the same or similar shape to each other, but are not limited thereto. For example, a tube-shaped segment including an internal hollow and a cylindrical-shaped segment may be arranged in order along the longitudinal direction to form the filter rod (22).

[0119] The filter rod (22) may include perforations (22P). The perforations (22P) may be formed along the circumferential direction of the filter rod (22) to form one or more rows. External air may be introduced into the interior of the filter rod (22) through the perforations (22P). The external air introduced into the interior of the filter rod (22) may be mixed with the aerosol generated in the aerosol generating rod (21) to dilute the aerosol.

[0120] The filter rod (22) can add flavor to the aerosol passing through the filter rod (22). For example, the filter rod (22) may contain a flavoring agent. The flavoring agent may be sprayed onto the filter rod (22) in a liquid state, but is not limited thereto. As another example, a separate fiber containing a flavoring agent may be inserted into the filter rod (22).

[0121] The flavoring agent may include, but is not limited to, menthol. For example, the flavoring agent may include botanical flavorings such as cinnamon, sage, herbs, chamomile, kudzu, sweet potato, lavender, bergamot, lemon, orange, jasmine, ginger, vanilla, spearmint, peppermint, acacia, coffee, celery, sandalwood, and cocoa. As another example, the flavoring agent may include animal flavorings such as musk, ambergris, civet, and castrium.

[0122] Flavoring agents may be alcohol compounds such as geraniol, linalol, anethole, eugenol, etc. Flavoring agents may be aldehyde compounds such as vanillin, benzaldehyde, anisaldehyde, etc. Flavoring agents may be ester compounds such as isoamyl acetate, linalyl acetate, isoamyl propionate, linalyl butyrate, etc.

[0123] The filter rod (22) may include at least one capsule (23). At least one capsule (23) may be embedded inside the filter material. The capsule (23) may generate flavor or aerosol. For example, the capsule (23) may be a structure in which a liquid containing a flavor agent is surrounded by a film. The film of the capsule (23) may rupture due to external pressure to release the liquid contained within the film. The liquid released from the capsule (23) may be absorbed by the filter material of the filter rod (22). The capsule (23) may have a spherical or cylindrical shape, but is not limited thereto.

[0124] The filter rod (22) may include an adsorbent. The adsorbent may adsorb specific substances in the gaseous phase. For example, the adsorbent may include at least one of activated carbon, zeolite, alumina, silica gel, and bentonite. The adsorbent may have the shape of particles, and a plurality of adsorbent particles may be uniformly dispersed over the entire area of ​​the filter material, but are not limited thereto. As another example, the adsorbent may be placed on the inner surface of a wrapper that contacts the outer surface of the filter rod (22).

[0125] The aerosol generating article (2) may include a wrapper (24) that surrounds at least a portion of the aerosol generating rod (21) and the filter rod (22). The wrapper (24) may be a single wrapper, but may also be a combination of multiple wrappers (241, 242, 24F, 24T).

[0126] The wrapper (24) may include paper. For example, the wrapper (24) has a thickness of about 10 μm to about 150 μm and a weight of about 20 g / m² 2 Up to about 100g / m² 2 It may include paper having a basis weight, but is not limited thereto. If the wrapper (24) is a combination of multiple wrappers, the thickness and basis weight of the paper included in the multiple wrappers may be the same or different.

[0127] The aerosol generating article (2) may be wrapped in overlapping layers by two or more wrappers. For example, the aerosol generating rod (21) may be wrapped by the first wrapper (241), the filter rod (22) may be wrapped by the second wrapper (242), and the aerosol generating rod (21) and the filter rod (22) may be re-wrapped by the final wrapper (24F).

[0128] The first wrapper (241) may surround the aerosol generating rod (21). The first wrapper (241) may burn together with the aerosol generating rod (21) as the combustion of the aerosol generating rod (21) proceeds. The first wrapper (241) may include a combustion promoter for promoting the combustion of the aerosol generating rod (21). The combustion promoter may include at least one of citrate, acetate, phosphate, tartrate, and nitrate, but is not limited thereto. For example, the combustion promoter may include at least one of ammonium phosphate, sodium citrate, and potassium citrate.

[0129] Additionally, the first wrapper (241) may include a combustion inhibitor. The combustion inhibitor can induce natural extinguishment by inhibiting the combustion of the first wrapper if the aerosol-generating article (2) is left unburned after use. The combustion inhibitor may be applied to the surface of the first wrapper (241), but is not limited thereto. For example, the first wrapper (241) may include a plurality of regions arranged along the circumferential direction and containing a combustion inhibitor, and the plurality of regions may be spaced apart from each other along the longitudinal direction of the aerosol-generating article (2).

[0130] The second wrapper (242) may surround the filter rod (22). The second wrapper (242) may be oil-resistant. As the second wrapper (242) is oil-resistant, the flavoring agent contained in the filter rod (22) and / or capsule (23) may be prevented from leaking out of the aerosol-generating article (2). For example, the second wrapper (242) may include at least one oil-resistant material among polyvinyl alcohol and silicone. The surface of the second wrapper (242) may be coated with an oil-resistant material.

[0131] The second wrapper (242) may include a perforation (242P). For example, the second wrapper (242) may surround the filter rod (22), and the perforation (242P) of the second wrapper (242) may be located at a position corresponding to the perforation (22P) of the filter rod (22).

[0132] The final wrapper (24F) can wrap the aerosol generating rod (21) and the filter rod (22) together. The final wrapper (24F) can prevent the outside of the aerosol generating article (2) from being contaminated. Meanwhile, the final wrapper (24F) may be omitted if necessary.

[0133] The final wrapper (24F) may include a perforation (24FP). For example, the final wrapper (24F) may surround the filter rod (22), and the perforation (24FP) of the final wrapper (24F) may be located at a position corresponding to the perforation (22P) of the filter rod (22).

[0134] The wrapper (24) may include a tip paper (24T). The tip paper (24T) may combine the aerosol generating rod (21) and the filter rod (22). The tip paper (24T) may surround a portion of the aerosol generating article (2) extending along the longitudinal direction of the aerosol generating article (2) from the downstream end of the aerosol generating article (2). For example, the tip paper (24T) may surround an area corresponding to the entire filter rod (22) and a portion of the aerosol generating rod (21). The tip paper (24T) may come into contact with the user's bend during use of the aerosol generating article (2).

[0135] The tip paper (24T) may include a perforation (24TP). For example, the tip paper (24T) may surround the filter rod (22), and the perforation (24TP) of the tip paper (24T) may be located at a position corresponding to the perforation (22P) of the filter rod (22).

[0136] The outer surface of the tip paper (24T) may be coated with a substance such as a sweetener and a lip release agent. The sweetener may provide a sweet taste to the user. For example, the sweetener may include sucralose, citric acid, etc., but is not limited thereto. The lip release agent may allow the user's bulb to be easily separated after contact with the tip paper (24T). For example, the lip release agent may include at least one of nitrocellulose, ethyl acetate, polyamide, and isopropyl alcohol, but is not limited thereto.

[0137] FIG. 3 illustrates a filter wrapper for an aerosol-generating article according to one embodiment.

[0138] FIG. 3 may be an enlarged cross-sectional view of a filter wrapper (242) for an aerosol-generating article according to one embodiment. The filter wrapper (242) according to one embodiment may refer to any one of the second wrapper (242) shown in FIG. 1 and FIG. 2.

[0139] Referring to FIG. 3, a filter wrapper (242) for an aerosol generating article according to one embodiment may include a paper layer (2421) and a coating layer (2422) disposed on both sides of the paper layer (2421). However, the structure of the filter wrapper (242) is not limited thereto, and the coating layer (2422) may be disposed only on one side of the paper layer (2421) and not disposed on the other side.

[0140] The coating layer (2422) may include one or more polymer resins selected from the group consisting of acrylic resins and polyvinyl alcohol resins. The coating layer (2422) may have oil resistance, and the oil-resistant coating layer (2422) can prevent the filter wrapper (242) from being contaminated by oil-soluble substances. For example, in the case of a filter containing a capsule, when the capsule ruptures, a fragrance liquid (e.g., a liquid containing a flavoring agent) located inside the capsule may be released. The fragrance liquid may reach the filter wrapper (242) by the pressure applied inside the capsule when the capsule ruptures. Since the fragrance liquid contains oil as a main component, it is required that the filter wrapper (242) have oil resistance to prevent contamination of the filter wrapper (242) by the fragrance liquid.

[0141] In the case of conventional oil-resistant filter wrappers, fluoropolymer resins are generally used as coating materials. However, fluoropolymer resins have a problem of poor stability under high temperature conditions, so they may be unsuitable for filter wrappers for aerosol-generating articles that involve heating and / or combustion during use. In contrast, the filter wrapper (242) for aerosol-generating articles according to one embodiment can prevent the aforementioned problem because the coating layer (2422) contains acrylic resin and / or polyvinyl alcohol resin, which have relatively excellent thermal stability.

[0142] Acrylic resin may refer to a resin in which, among the monomers constituting the resin, the acrylic monomer is about 70% by weight or more, about 75% by weight or more, about 80% by weight or more, or about 85% by weight or more. For example, the acrylic resin may be an acrylic polymer comprising polymerization units derived from (meth)acrylic acid ester monomers.

[0143] The solid content of the acrylic resin is about 10% by weight to about 40% by weight, and may contain about 30% by weight to about 60% by weight of an ester compound. For example, the solid content of the acrylic resin may be about 15% by weight to about 35% by weight, or about 20% by weight to about 30% by weight. In addition, the acrylic resin may contain about 35% by weight to about 55% by weight, or about 40% by weight to about 50% by weight of an ester compound.

[0144] Polyvinyl alcohol-based resin can be manufactured by polymerizing a polyvinyl ester-based polymer, such as polyvinyl acetate, as a precursor, dissolving the polyvinyl ester-based polymer in a solvent, and saponifying it by adding a catalyst. Polyvinyl alcohol is a linear polymer containing hydroxyl groups that has oil resistance and is easy to form into a film, so it may be suitable for use in forming a coating layer (2422) of a filter wrapper (242).

[0145] The polyvinyl alcohol-based resin may contain a solid content of about 1% to about 10% by weight. For example, the polyvinyl alcohol-based resin may contain a solid content of about 2% to about 8% by weight, or about 3% to about 7% by weight.

[0146] An adhesive may be used to attach the filter tow and the filter wrapper (242) in order to manufacture a filter for aerosol-generating articles by packaging the filter tow with a filter wrapper (242). Generally, a hydrophilic hot-melt adhesive containing ethylene-vinyl acetate copolymer (EVA), etc., is used as the adhesive to attach the filter tow and the filter wrapper (242). Meanwhile, since general acrylic resins and / or polyvinyl alcohol resins have excellent water resistance as well as oil resistance, it is difficult for the hydrophilic adhesive to penetrate the wrapper, and consequently, there is a problem of reduced adhesion between the filter tow and the filter wrapper (242).

[0147] However, if the solid content of the acrylic resin, the content of the ester compound, and / or the solid content of the polyvinyl alcohol resin have the aforementioned ranges, the water resistance of the coating layer (2422) can be controlled, and the hydrophilic adhesive can penetrate through the coating layer (2422) to the paper layer (2421). Accordingly, the filter wrapper (242) for an aerosol-generating article according to one embodiment can form a filter with excellent adhesion to the filter tow while ensuring oil resistance.

[0148] The weight of the coating layer (2422) may be about 3.5% to about 9% of the weight of the paper layer (2421). When the coating layer (2422) has a weight within the aforementioned range, the filter wrapper (242) may have adequate oil resistance while improving adhesion to the filter tow. If the weight of the coating layer (2422) is less than about 3.5% of the weight of the paper layer (2421), the oil resistance of the filter wrapper (242) may be insufficient. If the weight of the coating layer (2422) exceeds about 9% of the weight of the paper layer (2421), the adhesion of the filter wrapper (242) to the filter tow may be insufficient. For example, the weight of the coating layer (2422) may be about 4% to about 8%, or about 4.5% to about 7% of the weight of the paper layer (2421).

[0149] The paper layer (2421) may include a paper sheet. The basis weight of the paper layer (2421) is approximately 25 g / m² 2 Up to about 90 g / m² 2 It may be. For example, the basis weight of the paper layer (2421) is about 25 g / m² 2 Up to about 60 g / m² 2 or about 30 g / m² 2 Up to about 40 g / m² 2 It may be. Also, the thickness of the paper layer (2421) may be about 30 μm to about 70 μm. For example, the thickness of the paper layer (2421) may be about 30 μm to about 60 μm, or about 35 μm to about 50 μm.

[0150] The sizing of the paper layer (2421) may be about 3 sec to about 5 sec. The sizing may be measured by the Stoeckight method. The sizing according to the Stoeckight method may be measured by floating the test paper on a 2% ammonium rhodium solution at a temperature of 20±1℃, dropping a drop of 1% ferric chloride solution with a pipette, and measuring the time until a red spot appears.

[0151] The air permeability of the paper layer (2421) may be approximately 130 seconds or more. If the air permeability and sizing of the paper layer (2421) are within the aforementioned range, the filter wrapper (242) may have excellent oil resistance. If the air permeability and sizing of the paper layer (2421) fall outside the aforementioned range, the adhesion between the coating layer (2422) and the paper layer (2421) may decrease and they may separate from each other, and accordingly, the oil resistance of the filter wrapper (242) may be reduced.

[0152] The sizing of the filter wrapper (242) for an aerosol generating article according to one embodiment may be about 40 sec to about 70 sec. Within the aforementioned range, a hydrophilic adhesive may be absorbed into the filter wrapper (242), and accordingly, the adhesion between the filter wrapper (242) and the filter tow may be improved. For example, the sizing of the filter wrapper (242) according to one embodiment may be about 41 sec to about 65 sec, or about 42 sec to about 62 sec.

[0153] A filter wrapper (242) for an aerosol-generating article according to one embodiment may have an induction resistance of 6 to 11 in a test according to the Tappi T559 standard. Within the aforementioned range, the filter wrapper (242) may have an appropriate induction resistance so that contamination can be prevented.

[0154] A filter wrapper (242) for an aerosol-generating article according to one embodiment may have a product of induction resistance and sizing (sec) according to the Tappi T559 standard of about 250 or more. Within the aforementioned range, the filter wrapper (242) may have appropriate induction resistance while also having excellent adhesion to the filter tow. For example, a filter wrapper (242) for an aerosol-generating article according to one embodiment may have a product of induction resistance according to the Tappi T559 standard of the test and sizing (sec) of the wrapper of about 270 to about 1,100, or about 280 to about 550.

[0155]

[0156] Experimental Example 1: Filter wrapper comprising a coating layer containing an acrylic resin

[0157] A filter wrapper comprising a coating layer containing an acrylic resin was manufactured. The filter wrapper had a coating layer formed on both sides of a paper layer to have the same structure as the filter wrapper shown in Fig. 3. The acrylic resin included in the coating layer contained a solid content of approximately 25 wt% and an ester compound of approximately 45 wt%. The physical properties of the paper layer and the manufactured filter wrapper were measured, and the results are shown in Table 1 below.

[0158] Examples Paper layer filter Wrapper filter Basis weight (gsm) Thickness (μm) Air permeability (sec) Saturation (sec) Coating layer weight (%) Induction (Tappi 559) Saturation (sec) Filter suitability 1 40 405~6 x 7.3 20 △ 2 40 4015~20 4~5 5.3 4 35 △ 3 3 5 401503~5 9.0 1 19 7 O 4 3 5 401503~5 5.1 7 4 2 ◎ 5 3 5 401503~5 3.0 4 32 △

[0159] Filter suitability in Table 1 was determined by considering whether contamination occurs on the filter wrapper when manufacturing a filter using a filter wrapper, the adhesion between the filter wrapper and the filter tow, and was indicated as ◎, O, △, and X in order of excellent filter suitability.

[0160] As shown in Table 1, it was confirmed that the basis weight, thickness, and air permeability of the paper layer, as well as the weight, ductility, and sizing of the coating layer of the filter wrapper, affect filter suitability. In particular, the product of ductility and sizing of Example 4 was 294, and the product of ductility and sizing of Example 3 was 1,067, confirming excellent filter suitability.

[0161]

[0162] Experimental Example 2: Filter wrapper comprising a coating layer containing a polyvinyl alcohol-based resin

[0163] The physical properties of the paper layer and the manufactured filter wrapper were measured in the same manner as in Experimental Example 1, except that a polyvinyl alcohol-based resin containing about 5 wt% solid content was used. The measured results are shown in Table 2 below.

[0164] Examples Paper layer filter Wrapper filter Basis weight (gsm) Thickness (μm) Air permeability (sec) Saturation (sec) Coating layer weight (%) Induction resistance (Tappi 559) Saturation (sec) Filter suitability 6 40 40 5~6 x 3.100 △ 7 40 40 15~20 4~5 3.21~219 △ 8 35 40 130 3~5 3.98 62 ◎

[0165] As shown in Table 2, it was confirmed that, similar to Experimental Example 1, the basis weight, thickness, and air permeability of the paper layer, as well as the weight, induction resistance, and sizing of the coating layer of the filter wrapper, affect filter suitability. In particular, the product of the induction resistance and sizing of the filter wrapper in Example 8 was 496, which was confirmed to have the best filter suitability.

[0166] FIG. 4 illustrates a filter for an aerosol-generating article according to one embodiment.

[0167] FIG. 4 may be an enlarged cross-sectional view of a filter (22) for an aerosol generating article according to one embodiment. The filter (22) for an aerosol generating article according to one embodiment may refer to any one of the filter rods (22) shown in FIG. 1 to FIG. 2.

[0168] Referring to FIG. 4, a filter for an aerosol generating article according to one embodiment may include a filter tow (22T) and a filter wrapper (242) surrounding the filter tow (22T).

[0169] The filter tow (22T) may include a plurality of filter fibers. The filter tow (22T) may have a cylindrical shape formed by combining a plurality of filter fibers, but the shape of the filter tow (22T) is not limited thereto. The plurality of filter fibers included in the filter tow (22T) may be arranged to extend between the two ends of the filter tow (22T). For example, the filter tow (22T) may include a cellulose acetate tow comprising a plurality of cellulose acetate fibers. Since the above description may apply identically or similarly to the cellulose acetate tow, redundant descriptions are omitted.

[0170] As illustrated in FIG. 4, the filter tow (22T) and the filter wrapper (242) can be attached by a hydrophilic adhesive (A). Since the hydrophilic adhesive (A) can penetrate the interior of the filter wrapper (242) (e.g., a paper layer), the filter tow (22T) and the filter wrapper (242) can be stably bonded. The hydrophilic adhesive (A) may be a hot melt adhesive comprising an ethylene-vinyl acetate copolymer (EVA).

[0171] Although not illustrated in FIG. 4, a capsule containing fragrance liquid may be placed inside the filter tow (22T) of a filter for an aerosol generating article according to one embodiment. Since the above description may be applied to the capsule in the same or similar way, redundant descriptions are omitted.

[0172] FIG. 5 is a block diagram of an aerosol generating device (1) according to one embodiment.

[0173] According to one embodiment, the aerosol generating device (1) may include a power supply (11), a control unit (12), a sensor unit (13), an output unit (14), an input unit (15), a communication unit (16), a memory (17), and / or a heater (18, CH). However, it will be understood by those skilled in the art related to this embodiment that, depending on the design of the aerosol generating device (1), some of the components shown in FIG. 5 may be omitted or new components may be added.

[0174] According to one embodiment, the sensor unit (13) can detect the state of the aerosol generating device (1) or the state around the aerosol generating device (1) and transmit the detected information to the control unit (12). For example, the sensor unit (13) may include a temperature sensor, a puff sensor, an insertion detection sensor, a reuse detection sensor, an overly moist detection sensor, a cigarette identification sensor, a cartridge detection sensor, a cap detection sensor, and / or a motion detection sensor. Meanwhile, the sensor unit (13) may further include various sensors, such as a liquid residue sensor for detecting the liquid residue in the cartridge and a water immersion sensor for detecting the water immersion of the aerosol generating device (1).

[0175] According to one embodiment, a temperature sensor can detect the temperature at which the heater (18, CH) is heated. The aerosol generating device (1) may include a separate temperature sensor that detects the temperature of the heater (18, CH), or the heater (18, CH) itself may perform the role of a temperature sensor. For example, the temperature sensor may be used to measure the impedance of the heater (18). The impedance of the heater (18) may be correlated with the temperature of the heater (18). The temperature sensor may measure the current and / or voltage applied to the heater (18) (or induction coil). Based on the measured current and / or voltage, the impedance of the heater (18) may be calculated. The control unit (12) may estimate the temperature of the heater (18) based on the calculated impedance.

[0176] For example, the temperature sensor may include a resistive element (e.g., a thermistor) whose resistance value changes in response to a temperature change of the heater (18, CH). The temperature sensor may output a signal corresponding to the resistance value of the resistive element, and the control unit (12) may detect the temperature and / or temperature change of the heater (18, CH) based on the signal corresponding to the resistance value.

[0177] As another example, the temperature sensor may include a sensor that detects the resistance value of the heater (18, CH). The temperature sensor may output a signal corresponding to the resistance value of the heater (18, CH), and the control unit (12) may detect the temperature and / or temperature change of the heater (18, CH) based on the signal corresponding to the resistance value.

[0178] According to one embodiment, a temperature sensor can detect the temperature of a power source (11). The temperature sensor may be positioned adjacent to the power source (11). For example, the temperature sensor may be attached to one side of the power source (11) (e.g., a battery) and / or mounted on one side of a printed circuit board. For example, the aerosol generating device (1) may include a protection circuit module (PCM), and the temperature sensor may be positioned adjacent to the power source (11) together with the protection circuit module.

[0179] According to one embodiment, the temperature sensor may be placed inside the housing (not shown) of the aerosol generating device (1) to detect the temperature inside the housing (not shown).

[0180] According to one embodiment, the puff sensor can detect the user's puff.

[0181] For example, the puff sensor may include a pressure sensor. The pressure sensor may output a signal corresponding to the internal pressure of the aerosol generating device (1), and the control unit (12) may detect the user's puff based on the signal corresponding to the internal pressure. Here, the internal pressure of the aerosol generating device (1) may correspond to the pressure of the airflow path through which the gas flows. The puff sensor may be positioned in the aerosol generating device (1) in correspondence with the airflow path through which the gas flows.

[0182] As another example, the puff sensor may include a temperature sensor. When a user's puff occurs, a temporary temperature drop may occur in the airflow path, the space where the aerosol generating item is inserted (hereinafter, insertion space), the heater (18, CH), etc. The control unit (12) can detect the user's puff based on a signal corresponding to the temperature of the airflow path, etc. output from the temperature sensor.

[0183] As another example, the puff sensor may include both a pressure sensor and a temperature sensor. In this case, the temperature sensor may measure the temperature used to correct the internal pressure measured by the pressure sensor. As an example, the puff sensor may correct a signal corresponding to the internal pressure based on the temperature measured by the temperature sensor and output the corrected signal. As another example, the puff sensor may output a signal corresponding to the temperature measured by the temperature sensor and a signal corresponding to the internal pressure measured by the puff sensor. In this case, the control unit (12) may receive the signals and correct the signal corresponding to the internal pressure based on the signal corresponding to the temperature.

[0184] As another example, the puff sensor may include a capacitance sensor. In the present disclosure, the capacitance sensor may be referred to as a cap sensor or a capacitive sensor. When a user's puff occurs, a temperature change and / or a flow of aerosol may occur within the insertion space of the aerosol generating article, and accordingly, the dielectric constant inside the insertion space may change. The control unit (12) can detect the user's puff based on a signal corresponding to the dielectric constant inside the insertion space, etc., output from the capacitance sensor.

[0185] The puff sensor is not limited to the examples described above and can be implemented as various sensors to detect the user's puff.

[0186] According to one embodiment, an insertion detection sensor can detect the insertion and / or removal of an aerosol-generating article. The insertion detection sensor may be installed around the insertion space.

[0187] For example, the insertion detection sensor may include a capacitance sensor. The capacitance sensor may include at least one conductor, and the at least one conductor may be disposed adjacent to the insertion space. When an aerosol-generating article is inserted into or removed from the insertion space, the dielectric constant around the conductor may change. The control unit (12) may detect the insertion and / or removal of the aerosol-generating article based on a signal corresponding to the dielectric constant inside the insertion space, etc., output from the capacitance sensor.

[0188] As another example, the insertion detection sensor may include an inductive sensor. The inductive sensor may include at least one coil, and said at least one coil may be positioned adjacent to the insertion space. If the aerosol generating article (e.g., a wrapper of the aerosol generating article) includes a conductor, when the aerosol generating article is inserted into the insertion space or removed from the insertion space, a change in the magnetic field may occur around the coil through which the current flows. The control unit (12) may detect the insertion and / or removal of the aerosol generating article including the conductor based on the characteristics of the current output from or detected by the inductive sensor (e.g., frequency of alternating current, current value, voltage value, inductance value, impedance value, etc.). Alternatively, a susceptor (SUS), etc., may be included in the aerosol generating article (e.g., the medium part of the aerosol generating article). In this case as well, a change in the magnetic field around the coil may occur based on the insertion or removal of a susceptor, etc., within the insertion space, and the control unit (12) may detect the insertion and / or removal of an aerosol-generating article based on the characteristics of the current of the inductive sensor.

[0189] The insertion detection sensor is not limited to the examples described above and may be implemented as various sensors (e.g., proximity sensors, etc.) for detecting the insertion and / or removal of an aerosol-generating article. Additionally, the insertion detection sensor may include any combination of the examples described above. According to one embodiment, the insertion detection sensor may include a switch, etc., for detecting pressure caused by an aerosol-generating article.

[0190] According to one embodiment, a reuse detection sensor can detect whether an aerosol-generating article is reused. For example, the reuse detection sensor may be a color sensor for detecting the color of the aerosol-generating article. When the aerosol-generating article is used by a user, a change in color may occur in a part of the wrapper covering the outside of the aerosol-generating article due to the generated aerosol or heating. The color sensor may output a signal corresponding to an optical characteristic (e.g., wavelength of light) corresponding to the color of the wrapper based on light reflected from the wrapper. When the control unit (12) detects a change in color in a part of the wrapper, it may determine that the aerosol-generating article inserted into the insertion space has already been used.

[0191] According to one embodiment, the over-humidity detection sensor can detect whether the aerosol generating article is in an over-humid state. For example, the over-humidity detection sensor may include a capacitance sensor. The capacitance sensor may include at least one conductor disposed adjacent to an insertion space. The control unit (12) can detect whether the aerosol generating article is in an over-humid state based on the level of a signal corresponding to the dielectric constant, etc., output from the capacitance sensor. For example, the control unit (12) can determine the level range in which the level of the signal is included based on a look-up table, and determine the amount of moisture for the aerosol generating article based on the confirmed level range.

[0192] According to one embodiment, the cigarette identification sensor can detect whether an aerosol-generating article is genuine or / or detect the type of aerosol-generating article.

[0193] For example, a cigarette identification sensor may include a light sensor for detecting an identification material (or identification mark) located on the outer surface (e.g., wrapper) of an aerosol-generating article. The light sensor may irradiate light toward the identification material (or identification mark) of the aerosol-generating article and detect whether the aerosol-generating article is genuine and / or of a specific type based on the reflected light. For example, the identification material may include a material that emits light of a specific wavelength band based on the irradiated light. The control unit (12) may detect whether the aerosol-generating article is genuine and / or of a specific type based on the range of the wavelengths.

[0194] As another example, the cigarette identification sensor may include a capacitance sensor. The dielectric constant inside the insertion space may vary depending on the type of aerosol-generating item inserted into the insertion space. The control unit (12) can detect whether the aerosol-generating item is genuine and / or of the type based on a signal corresponding to the dielectric constant inside the insertion space, etc., output from the capacitance sensor.

[0195] As another example, the cigarette identification sensor may include an inductive sensor. If a conductor is included in the wrapper and / or interior (e.g., the medium) of the aerosol generating article inserted into the insertion space, the characteristics of the current detected by the inductive sensor when the aerosol generating article is inserted into the insertion space (e.g., frequency of alternating current, current value, voltage value, inductance value, impedance value, etc.) may differ depending on the type of aerosol generating article inserted into the insertion space. The control unit (12) can detect whether the inserted aerosol generating article is genuine and / or of the type based on the characteristics of the current output from or detected by the inductive sensor.

[0196] The cigarette identification sensor is not limited to the examples described above and may be implemented as various sensors for detecting whether an aerosol-generating article is genuine or / or for detecting the type of an aerosol-generating article. Additionally, the cigarette identification sensor may include any combination of the examples described above.

[0197] According to one embodiment, the cartridge detection sensor can detect the mounting and / or removal of a cartridge. For example, the cartridge detection sensor may include an inductive sensor, a capacitive sensor, a resistive sensor, a Hall sensor (hall IC), and / or an optical sensor.

[0198] According to one embodiment, a cap detection sensor can detect the mounting and / or removal of a cap. For example, the cap detection sensor may include an inductive sensor, a capacitive sensor, a resistive sensor, a contact sensor, a Hall sensor (hall IC), and / or an optical sensor. The cap may include a structure that covers at least a portion of a cartridge mounted or inserted into the aerosol generating device (1), or covers at least a portion of the housing of the aerosol generating device (1). The cap detection sensor may output a signal corresponding to the mounting or removal when the cap is mounted on the housing or removed from the housing, and the control unit (12) may detect the mounting or removal of the cap based on the signal corresponding to the mounting or removal.

[0199] According to one embodiment, the motion detection sensor can detect the movement of the aerosol generating device (1). The motion detection sensor may be implemented as at least one of an accelerometer or a gyro sensor.

[0200] According to one embodiment, the sensor unit (13) may further include at least one of a humidity sensor, an atmospheric pressure sensor, a geomagnetic sensor, a position sensor (Global Positioning System, GPS), or a proximity sensor in addition to the aforementioned sensors. Since the function of each sensor can be intuitively inferred by a person skilled in the art from its name, a detailed description may be omitted.

[0201] According to one embodiment, the output unit (14) may output information regarding the state of the aerosol generating device (1). The output unit (14) may include a display, a haptic unit and / or an acoustic output unit, but is not limited thereto. For example, information regarding the aerosol generating device (1) may include the charging / discharging state of the power supply (11) of the aerosol generating device (1), the preheating state of the heater (18, CH), the insertion / removal state of the aerosol generating article and / or cartridge, the mounting and / or removal state of the cap, or a state in which the use of the aerosol generating device (1) is restricted (e.g., detection of an abnormal article). The display may visually provide information regarding the state of the aerosol generating device (1) to the user. For example, the display may include an LED (light emitting diode) light-emitting element, a Liquid Crystal Display (LCD), an Organic Light Emitting Diodes (OLED), etc. The display can also be used as an input unit (15) if it includes a touch pad. The haptic unit can provide information about the state of the aerosol generating device (1) to the user tactilely. For example, the haptic unit may include a vibration motor, a piezoelectric element, an electric stimulation device, etc. The acoustic output unit can provide information about the aerosol generating device (1) to the user audibly. For example, the acoustic output unit can convert an electrical signal into an acoustic signal and output it externally.

[0202] According to one embodiment, the power source (11) can supply power for the operation of the aerosol generating device (1). The power source (11) may include one or more batteries. The power source (11) can supply power so that the heater (18, CH) can be heated. Additionally, the power source (11) may supply power required for the operation of other components included in the aerosol generating device (1), such as the control unit (12), sensor unit (13), output unit (14), input unit (15), communication unit (16), memory (17), etc. The power source (11) may be a rechargeable battery or a disposable battery. For example, the power source (11) may be a lithium polymer (LiPoly) battery, but is not limited thereto. The power source (11) may be a replaceable type (detachable) battery (hereinafter referred to as a removable battery). The removable battery may be mounted in a battery housing provided within the aerosol generating device (1) or removed from the battery housing. The removable battery may also be charged via wired and / or wireless connections.

[0203] According to one embodiment, a heater (18, CH) can heat an aerosol generating article and / or a medium and / or aerosol generating material within a cartridge by receiving power from a power source (11). An aerosol generating device (1) may include a heater (18) for heating an aerosol generating article and / or a cartridge heater (CH) for heating a cartridge (i.e., a solid and / or liquid medium).

[0204] According to one embodiment, the heater (18, CH) may be an electric resistive heater. For example, the electric resistive heater may include an electric resistive material such as a metal or metal alloy including titanium, zirconium, tantalum, platinum, nickel, cobalt, chromium, hafnium, niobium, molybdenum, tungsten, tin, gallium, manganese, iron, copper, stainless steel, nichrome, etc. The electric resistive heater may be implemented as a metal heating wire, a metal heating plate with an electric conductive track, a ceramic heating element, etc.

[0205] According to one embodiment, the heater (18, CH) may be an induction heating type heater. For example, the induction heating type heater may include a susceptor that generates heat by a magnetic field. A magnetic field may be generated from the induction coil by an alternating current flowing through the induction coil. The generated magnetic field penetrates the heater, and eddy currents may be generated in the susceptor. The susceptor may be heated based on the generation of eddy currents. According to one embodiment, the susceptor may be contained within an aerosol-generating article (e.g., a medium). In this case as well, the susceptor contained within the aerosol-generating article may be heated by the induction coil.

[0206] The heater (18, CH) is not limited to the examples described above and may include or be replaced with various heating methods, structures, components, etc. for heating an aerosol generating article and / or cartridge.

[0207] According to one embodiment, the input unit (15) can receive information input from a user. For example, the input unit (15) may include a touch panel, a button, a keypad, a dome switch, a jog wheel, a jog switch, etc.

[0208] According to one embodiment, the memory (17) is hardware that stores various data processed within the aerosol generating device (1), and can store data processed by the control unit (12) and data to be processed. For example, the memory (17) may include at least one type of storage medium among a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (e.g., SD or XD memory, etc.), RAM (random access memory), SRAM (static random access memory), ROM (read-only memory), EEPROM (electrically erasable programmable read-only memory), PROM (programmable read-only memory), magnetic memory, a magnetic disk, and an optical disk. For example, the memory (17) can store data such as the operating time of the aerosol generating device (1), the maximum number of puffs, the current number of puffs, at least one temperature profile, and the user's smoking pattern.

[0209] According to one embodiment, the communication unit (16) may include at least one component for communication with another electronic device (e.g., portable electronic device). For example, the communication unit (16) may include a Bluetooth communication unit, a BLE (Bluetooth Low Energy) communication unit, a Near Field Communication unit, a WLAN (wireless local area network) communication unit, a Zigbee communication unit, an infrared (infrared Data Association, IrDA) communication unit, a WFD (Wireless Fidelity Direct) communication unit, an UWB (ultra wideband) communication unit, an Ant (Adaptive Network Topology)+ communication unit, a cellular network communication unit, an internet communication unit, a computer network (e.g., LAN or WAN) communication unit, etc.

[0210] According to one embodiment, the control unit (12) can control the overall operation of the aerosol generating device (1). For example, the control unit (12) may include at least one processor. The control unit (12) may be implemented as an array of logic gates, or as a combination of a general-purpose MCU (micro controller unit) (or microprocessor) and a memory storing a program that can be executed on such MCU. Furthermore, it will be understood by those skilled in the art to which this embodiment belongs that it may be implemented in other forms of hardware.

[0211] According to one embodiment, the control unit (12) can control the temperature of the heater (18, CH) by controlling the supply of power from the power source (11) to the heater (18, CH). The control unit (12) can control the temperature of the heater (18, CH) and / or the power supplied to the heater (18, CH) based on the temperature of the heater (18, CH) detected using a temperature sensor (e.g., sensor unit (13)). The control unit (12) can control the temperature of the heater (18, CH) and / or the power supplied to the heater (18, CH) based on a temperature profile and / or power profile stored in the memory (17).

[0212] According to one embodiment, the control unit (12) can control the power (e.g., voltage and / or current) supplied to the heater (18, CH) by controlling a power conversion circuit (not shown) electrically connected to the heater (18, CH) and the power source (11). For example, the power conversion circuit may include a DC / DC converter (e.g., buck converter, buck-boost converter, boost converter, Zener diode, etc.) that converts power to be supplied to the heater (18, CH), and a DC / AC converter (e.g., inverter) that converts power to be supplied to an induction coil (not shown). The DC / AC converter may be implemented as a full-bridge circuit or a half-bridge circuit including a plurality of switching elements. For example, the power conversion circuit may include at least one switching element, such as a bipolar junction transistor (BJT) or a field effect transistor (FET).

[0213] According to one embodiment, the control unit (12) can adjust the frequency and / or duty ratio of a current pulse input to at least one switching element of a power conversion circuit (not shown) to adjust the current and / or voltage supplied to the heater (18, CH). The duty ratio for the on / off operation of the switching element may correspond to the ratio of the output voltage of the power conversion circuit to the output voltage of the power supply (11).

[0214] According to one embodiment, the control unit (12) can control the power supplied to the heater (18, CH) by using at least one of a Pulse Width Modulation (PWM) method and a Proportional-Integral-Differential (PID) method. For example, the control unit (12) can control the supply of a current pulse having a predetermined frequency and duty ratio to the heater (18, CH) by using the PWM method. The control unit (12) can control the power supplied to the heater (18, CH) by adjusting the frequency and duty ratio of the current pulse. For example, the control unit (12) can determine a target temperature that is the target of the control based on a temperature profile. The control unit (12) can control the power supplied to the heater (18, CH) by using a PID method, which is a feedback control method using the difference value between the temperature of the heater (18, CH) and the target temperature, the value obtained by integrating the difference value over time, and the value obtained by differentiating the difference value over time.

[0215] According to one embodiment, the control unit (12) can determine a target power that is the target of control based on a power profile. The control unit (12) may also control the power supplied to the heater (18, CH) to correspond to a preset target power over time.

[0216] According to one embodiment, the control unit (12) can detect the user's puff by detecting the power supplied to the heater (18, CH). More specifically, the control unit (12) can control the power supplied to the heater (18, CH) using a PID method. When the user's puff occurs, a temporary temperature drop may occur in the space where the aerosol generating item is inserted (hereinafter, insertion space), the heater (18, CH), etc. Accordingly, a change may occur in the power (or current) supplied to the heater (18, CH) during the power control using the PID method. The control unit (12) can detect the user's puff based on the change in the controlled power.

[0217] According to one embodiment, the control unit (12) can prevent the heater (18, CH) from overheating. For example, the control unit (12) can control the operation of the power conversion circuit to reduce the amount of power supplied to the heater (18, CH) or stop the power supply to the heater (18, CH) based on the fact that the temperature of the heater (18, CH) exceeds a preset limit temperature.

[0218] According to one embodiment, the control unit (12) can control the charging and discharging of the power source (11). For example, the control unit (12) can check the temperature of the power source (11) using a temperature sensor (e.g., sensor unit (13)). The control unit (12) can cut off the charging of the power source (11) if the temperature of the power source (11) is above a first limit temperature. The control unit (12) can stop the use (e.g., discharge) of the power stored in the power source (11) if the temperature of the power source (11) is above a second limit temperature. The control unit (12) can calculate the remaining capacity of the power stored in the power source (11). For example, the control unit (12) can calculate the remaining capacity of the power source (11) based on the voltage and / or current sensing values ​​of the power source (11).

[0219] According to one embodiment, the control unit (12) can control the power supply to the heater (18, CH) based on the result detected by the sensor unit (13).

[0220] According to one embodiment, the control unit (12) can control the power supply to the heater (18, CH) based on the insertion and / or removal of an aerosol-generating article into the insertion space. For example, the control unit (12) can control the power supply to the heater (18, CH) when it is determined that an aerosol-generating article has been inserted into the insertion space using an insertion detection sensor (e.g., sensor unit (13)). The control unit (12) can cut off the power supply to the heater (18, CH) when it is determined that an aerosol-generating article has been removed from the insertion space using an insertion detection sensor (e.g., sensor unit (13)). The control unit (12) may also determine that an aerosol-generating article has been removed from the insertion space if the temperature of the heater (18, CH) is above a limit temperature or the temperature change slope of the heater (18, CH) is above a set slope.

[0221] According to one embodiment, the control unit (12) can control the power supply time and / or power supply amount for the heater (18, CH) based on the state of the aerosol generating article. For example, the control unit (12) can increase the power supply time (e.g., preheating time) for the heater (18, CH) if it is determined that the aerosol generating article is in an over-humid state using an over-humidity detection sensor (e.g., sensor unit (13)).

[0222] According to one embodiment, the control unit (12) can control the power supply to the heater (18, CH) based on whether the aerosol generating article is reused. For example, if the control unit (12) determines that the aerosol generating article has been used, it can cut off the power supply to the heater (18, CH).

[0223] According to one embodiment, the control unit (12) can control the power supply to the heater (18, CH) based on whether the cartridge is connected and / or removed. For example, the control unit (12) can use a cartridge detection sensor (e.g., sensor unit (13)) to determine that the cartridge is separated, and if it is determined that the cartridge is separated, the power supply to the heater (18, CH) can be stopped or the power supply to the heater (18, CH) can be controlled so that power is not supplied to the heater (18, CH).

[0224] According to one embodiment, the control unit (12) can control the power supply to the heater (18, CH) based on whether the aerosol generating material of the cartridge is depleted. For example, the control unit (12) may determine that the aerosol generating material of the cartridge is depleted if it determines that the temperature of the heater (18, CH) exceeds a limit temperature while preheating the heater (18, CH) (i.e., during the preheating period). If it is determined that the aerosol generating material of the cartridge is depleted, the control unit (12) may cut off the power supply to the heater (18, CH).

[0225] According to one embodiment, the control unit (12) can control the power supply to the heater (18, CH) based on whether the cartridge is usable. For example, the control unit (12) may determine that the cartridge is unusable if, based on data stored in the memory (17), the current number of puffs is determined to be greater than or equal to the maximum number of puffs set in the cartridge. Alternatively, the control unit (12) may determine that the cartridge is unusable if the total time the heater (18, CH) is heated is greater than or equal to the preset maximum time, or if the total amount of power supplied to the heater (18, CH) is greater than or equal to the preset maximum amount of power. In this case, the control unit (12) may stop the power supply to the heater (18, CH) or control it so that power is not supplied to the heater (18, CH).

[0226] According to one embodiment, the control unit (12) can control the power supply to the heater (18, CH) based on the user's puff. For example, the control unit (12) can determine whether a puff has occurred and / or the intensity of the puff using a puff sensor (e.g., sensor unit (13)). The control unit (12) can cut off the power supply to the heater (18, CH) when the number of puffs reaches a preset maximum number of puffs or / or when no puff is detected for a preset time or longer. The control unit (12) may also control the power supply to the heater (18, CH) when a puff is detected.

[0227] According to one embodiment, the control unit (12) can control the power supply to the heater (18, CH) based on whether the aerosol generating item (or cartridge) is genuine and / or of a specific type. For example, the control unit (12) can detect whether the aerosol generating item is genuine and / or of a specific type using a cigarette identification sensor (e.g., sensor unit (13)). For example, if the control unit (12) detects that the aerosol generating item (or cartridge) is counterfeit, it can cut off the power supply to the heater (18, CH). If the control unit (12) detects that the aerosol generating item (or cartridge) is genuine, it can control (e.g., start) the power supply to the heater (18, CH). For another example, the control unit (12) can control the power supply to the heater (18, CH) differently depending on the specific type of the aerosol generating item (or cartridge). More specifically, the control unit (12) can control the temperature and / or power of the heater (18, CH) based on a first temperature profile (or a first power profile) when it is detected that the aerosol generating article (or cartridge) is a first aerosol generating article (or a first cartridge), and control the temperature and / or power of the heater (18, CH) based on a second temperature profile (or a second power profile) when it is detected that the aerosol generating article (or a second cartridge) is a second aerosol generating article (or a second cartridge).

[0228] According to one embodiment, the control unit (12) can control the output unit (14) based on the result detected by the sensor unit (13). For example, the control unit (12) can control the output unit (14) to provide visual, tactile, and / or auditory information that the aerosol generating device (1) will soon be terminated when the number of puffs counted using the puff sensor (e.g., sensor unit (13)) reaches a preset number. For example, the control unit (12) can also control the output unit (14) to provide visual, tactile, and / or auditory information regarding the temperature of the heater (18, CH).

[0229] According to one embodiment, the control unit (12) may store and update a history of the event that occurred in the memory (17) based on the occurrence of a predetermined event. For example, the event may include operations performed in the aerosol generating device (1), such as detection of insertion of an aerosol generating article, initiation of heating of the aerosol generating article, puff detection, puff termination, detection of overheating of the heater (18, CH), detection of overvoltage application to the heater (18, CH), termination of heating of the aerosol generating article, power on / off of the aerosol generating device (1), initiation of charging of the power source (11), detection of overcharging of the power source (11), termination of charging of the power source (11), etc. For example, the history of the event may include the time and date when the event occurred, log data corresponding to the event, etc. For example, if a predetermined event is the detection of insertion of an aerosol-generating article, the log data corresponding to the event may include data regarding the sensing value of an insertion detection sensor (e.g., sensor unit (13)). For example, if a predetermined event is the detection of overheating of a heater (18, CH), the log data corresponding to the event may include data regarding the temperature of the heater (18, CH), the voltage applied to the heater (18, CH), the current flowing through the heater (18, CH), etc.

[0230] According to one embodiment, the control unit (12) can control the communication unit (16) to form a communication link with an external device, such as a user's mobile terminal.

[0231] According to one embodiment, when the control unit (12) receives authentication data from an external device via a communication link, it may release the restriction on the use of at least one function (e.g., heating function) of the aerosol generating device (1). For example, the authentication data may include the user's birthday, a unique number representing the user, whether the user's authentication is complete, etc.

[0232] According to one embodiment, the control unit (12) can transmit data regarding the status of the aerosol generating device (1) (e.g., remaining capacity of the power supply (11), operating mode, etc.) to an external device via a communication link. The transmitted data can be output through a display of the external device, etc.

[0233] According to one embodiment, when a control unit (12) receives a location search request for an aerosol generating device (1) from an external device via a communication link, the control unit (12) can control the output unit (14) to perform an operation corresponding to the location search. For example, the control unit (12) can control the haptic unit to generate vibrations or control the display to output an object corresponding to the location search and the end of the search.

[0234] According to one embodiment, the control unit (12) can perform a firmware update when firmware data is received from an external device through a communication link.

[0235] According to one embodiment, the control unit (12) transmits data regarding the sensing value of at least one sensor unit (13) to an external server (not shown) via a communication link, and receives and stores a learning model generated by learning the sensing value through machine learning, such as deep learning, from the server. The control unit (12) can use the learning model received from the server to perform operations such as determining the user's inhalation pattern and generating a temperature profile.

[0236] Although not illustrated in FIG. 5, the aerosol generating device (1) may further include a power protection circuit. The power protection circuit may include at least one switching element and may cut off the power supply (11) in response to overcharging and / or over-discharging of the power supply (11). The aerosol generating device (1) may further include a connection interface, such as a USB (universal serial bus) interface, and may transmit and receive information or charge the power supply (11) by connecting to another external device through the connection interface.

[0237] The aerosol generating article mentioned in the present disclosure may include at least one aerosol generating rod (e.g., a medium part) and at least one filter rod. A heater (18) may be positioned to correspond to at least one aerosol generating rod and may be designed differently depending on the arrangement order and / or position of the aerosol generating rod and the filter rod. The aerosol generating rod may include at least one of nicotine, an aerosol generating material, and an additive. For example, the aerosol generating material may include glycerin (e.g., vegetable glycerin (VG)) and / or propylene glycol (PG), and may include various other materials. For example, the additive may include flavoring agents and / or organic acids, and may include various other materials. For example, the aerosol generating rod may comprise an aerosol generating substrate (e.g., a sheet) impregnated with a liquid non-tobacco material (e.g., an aerosol generating material and / or nicotine), and / or may comprise a solid tobacco material (e.g., leaf tobacco, reconstituted tobacco, etc.). The tobacco material may be included in the aerosol generating rod in various forms, such as whole tobacco, granules, or powder. According to one embodiment, the additive of the aerosol generating rod may comprise a basic material. Based on the basic material, the nicotine in the tobacco material included in the aerosol generating rod may have a basic pH (e.g., pH 7.0 or higher). In this case, freebase nicotine may be released from the aerosol generating rod even at low temperatures. According to one embodiment, the aerosol generating rod comprises two or more aerosol generating rods, and said two or more aerosol generating rods may each comprise a tobacco material and / or a non-tobacco material.Meanwhile, although not illustrated, at least one aerosol generating rod and at least one filter rod may each and / or integrally be wrapped by at least one wrapper. In the present disclosure, the aerosol generating article may be referred to as a stick.

[0238] The cartridge mentioned in the present disclosure may contain an aerosol generating material having any one of the states, such as a liquid state, a solid state, a gaseous state, or a gel state. The aerosol generating material may include a liquid composition. For example, the liquid composition may be a liquid containing a tobacco-containing material containing a volatile tobacco flavor component, or a liquid containing a non-tobacco material. Meanwhile, the cartridge may include a storage portion containing the aerosol generating material and / or a liquid delivery means impregnated (containing) the aerosol generating material. For example, the liquid delivery means may include a wick such as a cotton fiber, a ceramic fiber, a glass fiber, or a porous ceramic. A cartridge heater (CH) may be included in the cartridge in a coil-shaped structure that surrounds (or winds) the liquid delivery means or in a structure that contacts one side of the liquid delivery means. Alternatively, the cartridge heater (CH) may be included in an aerosol generating device (1) that is detachable from the cartridge.

[0239] Some or other embodiments of the present disclosure described above are not exclusive or distinct from one another. Some or other embodiments of the present disclosure described above may be used in combination or combined for their respective configurations or functions.

[0240] For example, this means that configuration A described in a specific embodiment and / or drawing and configuration B described in another embodiment and / or drawing can be combined. That is, even if the combination between configurations is not directly described, it means that combination is possible, except where it is described that combination is impossible.

[0241] The foregoing detailed description should not be interpreted restrictively in all respects and should be considered exemplary. The scope of the invention shall be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the invention are included within the scope of the invention.

Claims

1. A paper layer and a coating layer disposed on at least one surface of the paper layer, and A filter wrapper for an aerosol-generating article, wherein the coating layer comprises one or more polymer resins selected from the group consisting of acrylic resins and polyvinyl alcohol-based resins.

2. In Paragraph 1, A filter wrapper for an aerosol-generating article, comprising 10% to 40% by weight of the solid content of the acrylic resin and 30% to 60% by weight of an ester compound.

3. In Paragraph 1, The above polyvinyl alcohol-based resin is a filter wrapper for an aerosol-generating article containing 1% to 10% by weight of solid content.

4. In Paragraph 1, A filter wrapper for an aerosol-generating article, wherein the weight of the coating layer is 3.5% to 9% of the weight of the paper layer.

5. In Paragraph 1, The basis weight of the above paper layer is 25 g / m² 2 Up to 90 g / m² 2 A filter wrapper for an aerosol-generating article, having a thickness of 30 μm to 70 μm.

6. In Paragraph 1, A filter wrapper for an aerosol-generating article, wherein the size of the paper layer is 3 sec to 5 sec.

7. In Paragraph 1, A filter wrapper for aerosol-generating articles, wherein the air permeability of the above paper layer is 130 sec or more.

8. In Paragraph 1, The above filter wrapper is a filter wrapper for aerosol-generating articles having an induction resistance of 6 to 11 in a test according to the Tappi T559 standard.

9. In Paragraph 1, A filter wrapper for an aerosol-generating article, wherein the size of the filter wrapper is 40 sec to 70 sec.

10. In Paragraph 1, A filter wrapper for an aerosol-generating article, wherein the product of the induction resistance in a test according to the Tappi T559 standard of the filter wrapper and the sizing (sec) of the filter wrapper is 250 or more.

11. Filter tow comprising filter fibers; and A filter for an aerosol-generating article comprising: a filter wrapper according to claim 1 surrounding the filter tow.

12. In Paragraph 11, A filter for an aerosol generating article, disposed inside the filter tow and further comprising a capsule containing a fragrance liquid.

13. In Paragraph 11, A filter for an aerosol generating article, wherein the filter tow and the filter wrapper are attached by a hydrophilic adhesive.

14. In Paragraph 13, A filter for an aerosol-generating article, wherein the above-mentioned hydrophilic adhesive is a hot-melt adhesive comprising ethylene-vinyl acetate copolymer (EVA).

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