Smoking article containing lyocell tow

Abstract

A smoking article is provided. The smoking article comprises: a medium portion; a front-end filter segment disposed on one side of the medium portion and comprising a lyocell tow comprising a plurality of lyocell fibers; and a mouthpiece portion spaced apart from the other side opposite to the one side of the medium portion.

Description

Smoking articles containing lyocell tow

[0001] The present invention relates to a smoking article in which a shear filter segment that borders a medium portion upstream of a medium portion is formed of lyocell tow including a plurality of lyocell fibers, thereby preventing aerosol liquefied from a medium portion during smoking from flowing into an aerosol generating device, preventing the tow from melting due to heat for heating the medium portion, and improving the uniformity of dispersion of a moisturizer within the shear filter segment.

[0002]

[0003] In smoking devices, the transfer of tobacco components (e.g., nicotine, tar) and the generation of vapor (vapor) significantly impact the user's smoking experience. Typically, smoking devices operate by heating a stick to a high temperature of approximately 150-300°C using a device. This heat is then transferred to a medium, increasing the temperature of the medium and facilitating the transfer of tobacco components such as nicotine. Alternatively, a separate heating rod can be inserted into the medium to increase the temperature of the medium.

[0004] However, this structure has the following problems:

[0005] First, as the heating rod heats to high temperatures, residue (sap, contaminants) from tobacco components adhere to the rod. This residue causes a decline in device performance during use and necessitates periodic cleaning to remove any remaining contaminants.

[0006] Second, during the process of removing smoking materials from the device after smoking, some tobacco components can leak into the device, causing discomfort to the user. These components can impair the device's operation and hygiene, negatively impacting the user experience.

[0007]

[0008] The problem to be solved by the present invention is to provide an improved smoking article comprising a shear filter segment, a medium portion, a support structure, a cooling structure, and a mouthpiece portion, in which a shear filter segment that borders the medium portion upstream of the medium portion is formed of lyocell tow including a plurality of lyocell fibers, thereby preventing aerosol liquefied from the medium portion during smoking from flowing into an aerosol generating device, preventing the tow from melting due to heat for heating the medium portion, and improving the dispersion of a moisturizer within the shear filter segment.

[0009] The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the description below.

[0010]

[0011] A smoking article according to one aspect of the present application comprises a medium portion, a shear filter segment disposed on one side of the medium portion and comprising lyocell tow comprising a plurality of lyocell fibers, and a mouthpiece portion disposed spaced apart from the one side of the medium portion on the other side.

[0012] In some embodiments, the device may further include a cooling structure disposed between the medium portion and the mouthpiece portion.

[0013] In some embodiments, the device may further include a support structure disposed between the medium portion and the cooling structure.

[0014] In some embodiments, the support structure may include at least one of a lyocell filter and a cellulose acetate filter.

[0015] In some embodiments, the support structure may have a tube shape with a hollow space formed therein.

[0016] In some embodiments, the support structure comprises at least one of a lyocell filter and a cellulose acetate filter, and the support structure may have a tube shape with a hollow space formed therein.

[0017] In some embodiments, the cooling structure may include at least one of a lyocell filter, a paper filter, and a cellulose acetate filter.

[0018] In some embodiments, the cooling structure may have a tube shape with a hollow space formed therein.

[0019] In some embodiments, the cooling structure includes at least one of a lyocell filter, a tube filter, and a cellulose acetate filter, and the cooling structure may have a tube shape with a hollow space formed therein.

[0020] In some embodiments, the shear filter segment may further comprise one or more moisturizers.

[0021] In some embodiments, the moisturizer may be dispersed throughout the entire area of ​​the lyocell tow.

[0022] In some embodiments, the moisturizer may include at least one of glycerin or propylene glycol.

[0023] In some embodiments, the length of the medium portion may be from 5 mm to 14 mm.

[0024] In some embodiments, the length of the shear filter segment may be from 3 mm to 12 mm.

[0025] In some embodiments, the length of the medium portion may be from 5 mm to 14 mm, and the length of the shear filter segment may be from 3 mm to 12 mm.

[0026] In another aspect of the present application, a system is provided comprising the smoking article described above and an aerosol generating device applying the same.

[0027]

[0028] The present invention provides a smoking article in which a shear filter segment, which borders a medium portion upstream of a medium portion, is formed of a lyocell tow including a plurality of lyocell fibers, thereby preventing aerosol liquefied from the medium portion during smoking from flowing into an aerosol generating device, preventing the tow from melting due to heat for heating the medium portion, and improving the dispersion of a moisturizer within the shear filter segment.

[0029] The effects according to the technical idea of ​​the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

[0030]

[0031] FIG. 1 is a schematic drawing of a smoking article according to one embodiment of the present invention.

[0032] FIG. 2 is a schematic drawing of a smoking article according to another embodiment of the present invention.

[0033] Figure 3 is a photograph of the filters of Example 1 and Comparative Example 1 taken before and after heating to compare the heat resistance characteristics of the filters of Example 1 and Comparative Example 1.

[0034] Figure 4 is a photograph of the filters of Example 2 and Comparative Example 2 taken after one week of conditioning to compare the glycerin dispersibility of the filters of Example 2 and Comparative Example 2.

[0035] Figures 5 to 7 illustrate various types of aerosol generating devices to which smoking articles according to some embodiments of the present disclosure may be applied.

[0036]

[0037] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the attached drawings. The advantages and features of the present disclosure, and methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the attached drawings. However, the technical idea of ​​the present disclosure is not limited to the following embodiments and may be implemented in various different forms. The following embodiments are provided only to complete the technical idea of ​​the present disclosure and to fully inform those skilled in the art of the present disclosure of the scope of the present disclosure, and the technical idea of ​​the present disclosure is defined only by the scope of the claims.

[0038] When assigning reference numerals to components in each drawing, it should be noted that identical components are assigned the same numerals whenever possible, even if they appear on different drawings. Furthermore, when describing the present disclosure, if a detailed description of a related known configuration or function is deemed likely to obscure the gist of the present disclosure, such detailed description will be omitted.

[0039] Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used in the same sense as commonly understood by those of ordinary skill in the art to which this disclosure pertains. Furthermore, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise. The terminology used herein is for the purpose of describing embodiments and is not intended to limit the disclosure. In this specification, singular forms also include plural forms, unless specifically stated otherwise.

[0040] Additionally, terms such as first, second, A, B, (a), (b), etc. may be used to describe components of the present disclosure. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by the terms. When a component is described as being "connected," "coupled," or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but another component may also be "connected," "coupled," or "connected" between each component.

[0041] As used herein, the terms “comprises” and / or “comprising” do not exclude the presence or addition of one or more other components, steps, operations, and / or elements.

[0042] First, let's clarify some terms used in this specification.

[0043] As used herein, the term "smoking article" may mean any smokeable product or any product capable of providing a smoking experience, whether based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco, or tobacco substitutes. For example, smoking articles may include smokeable products such as cigarettes, cigars, and cigarillos.

[0044] In this specification, “smoking material” may mean any type of material that can be used in smoking articles.

[0045] In this specification, the term “user” may be used interchangeably with “consumer.”

[0046] In this specification, “upstream” or “upstream direction” may mean a direction away from the smoker’s mouth, and “downstream” or “downstream direction” may mean a direction approaching the smoker’s mouth.

[0047] As used herein, the term "longitudinal direction" may refer to a direction corresponding to the longitudinal axis of a smoking article. The "longitudinal axis" of a smoking article may refer to an imaginary line extending along the main longitudinal direction of the smoking article. This axis typically extends from one end of the smoking article (e.g., the mouthpiece or filter end) to the opposite end (e.g., the combustion or heat source end).

[0048] As used herein, “lyocell filter” refers to a filter comprising or consisting of lyocell tow.

[0049] As used herein, “Lyocell tow” refers to a bundle comprising or consisting of a plurality of Lyocell fibers. In some embodiments, Lyocell tow may refer to a bundle formed by cross-linking adjacent Lyocell fibers.

[0050] As used herein, “Lyocell fiber” may mean a fiber made from lyocell cellulose. In particular, the lyocell fiber may be a fiber made from cellulose derived from or primarily derived from wood pulp, particularly a semi-synthetic fiber.

[0051] In this specification, “leaf” may mean reconstituted tobacco leaves.

[0052] As used herein, the terms "reconstituted tobacco leaf" and "reconstituted tobacco sheet" may refer to a sheet made by combining tobacco by-products selected from the group consisting of stems, dust, particulates, and combinations thereof with a binder. In some embodiments, the reconstituted tobacco leaf is homogenized tobacco leaf.

[0053] In this specification, a “recess filter” as a filter may refer to a filter including one or more pores.

[0054] In this specification, “hollow” may mean a channel extending along the longitudinal direction.

[0055] In this specification, “wrapping” of a medium portion, a support structure, a cooling structure, a shear filter segment and / or a mouthpiece portion by a wrapper may refer to at least a portion of the peripheral surface of the longitudinal axis of the medium portion, the support structure, the cooling structure, the shear filter segment and / or the mouthpiece portion being surrounded by the wrapper.

[0056] In this specification, the “single fiber” of lyocell tow or cellulose acetate tow means the fiber size of a single strand of monofilament separated from a multifilament of lyocell fibers or cellulose acetate fibers constituting the lyocell tow or cellulose acetate tow.

[0057] In this specification, the hardness of the filter is a value that quantifies the degree to which the diameter of the filter is maintained when the filter is pressed with a certain level of force in a direction perpendicular to the longitudinal direction of the filter, and may be a percentage of the diameter of the filter after the force is applied compared to the diameter of the filter before the force is applied. For example, the hardness (%) of the filter can be calculated as (Da) / D × 100%. Here, D is the diameter of the filter, and a represents the distance lowered (i.e., the filter is pressed) by a weight of 300 g. The measurement value required in calculating the hardness is, for example, the DHT 200 of Filtrona. TMcan be obtained using . In measuring the hardness, the force applied to the filter can be considered as a value equivalent to the force applied when an actual user holds a smoking article.

[0058] In this specification, the “total fineness” of lyocell tow or cellulose acetate tow means the fineness of the multifilaments of lyocell fibers or cellulose acetate fibers constituting the lyocell tow or cellulose acetate tow.

[0059] A filter of a smoking article according to one aspect of the present invention can capture at least a portion of smoke components generated when smoking the smoking article. In some embodiments, the filter of the smoking article can capture particulate matter (total particulate matter (TPM)) including at least a portion of at least one of nicotine (hereinafter abbreviated as “Nic”), tar, propylene glycol (hereinafter abbreviated as “PG”), and glycerin (hereinafter abbreviated as “Gly”) contained in the smoke components generated when smoking the smoking article.

[0060] In this specification, “roundness” refers to the degree of deviation from a geometric circle. For example, the roundness of a filter can be defined as (radius of smaller circle / radius of larger circle) × 100% when two imaginary circles with the smallest distance between them are drawn among concentric circles that touch at least one point on the outer circumference of the filter in the filter cross-section and have different radii.

[0061] In this specification, “suction resistance” means the static pressure difference between the two ends of a sample when an airflow crosses the sample. In this specification, “PDC” means the value of the suction resistance measured when the medium part is open, the perforations of the filter part are blocked, and the inflow of outside air is blocked, and “PDO” means the value of the suction resistance measured when the medium part is open, the perforations of the filter part are not blocked, and the inflow of outside air is allowed. For example, the suction resistance can be measured using the method specified in ISO standard 6565:2015. According to ISO standard 6565:2015, the suction resistance can mean the static pressure difference between the two ends of a sample when it is crossed by an airflow under normal conditions (22±2℃, 60±5% relative humidity) with a volumetric flow rate of 17.5 mm / s at the discharge end.

[0062] In this specification, organic acid is a general term for organic compounds that are acidic.

[0063] In some embodiments, room temperature may mean 20° C. to 25° C.

[0064] In this specification, when no separate physical quantity is indicated, component % and component ratio mean weight % of component and weight ratio of component, respectively.

[0065] As used herein, "puff" refers to the act of inhaling or drawing air through a smoking article to produce and inhale smoke or vapor. "Puff count" may refer to the total number of inhalations or draws made while using the smoking article. Alternatively, or in addition, the puff count may refer to the maximum number of inhalations or draws that the smoking article can provide before being completely consumed or ceases to function.

[0066] In this specification, the HC (Health Canada) conditions may be conditions in which the puff volume per puff is 55 ml, the puff frequency is every 30 seconds, and the puff duration is 2 seconds. In particular, the HC conditions may be conditions in which the perforations of the filter are blocked. The number of puffs measured under the HC conditions may be conditions in which 9 puffs are taken.

[0067] In this specification, the "ventilation rate (hereinafter may be abbreviated as "Vent")" of a smoking article may be defined as the ratio, expressed as a percentage, of the total volumetric flow rate (e.g., ml / s) of air that enters the smoking article without being burned or heated, i.e., through the front area of ​​the smoking article, i.e., the longitudinal upstream end, to the total volumetric flow rate (e.g., ml / s) of air at the outlet of the smoking article, i.e., the longitudinal downstream end. For example, the ventilation rate may be measured according to ISO 9512:2019. For example, the total volumetric flow rate of air that enters the smoking article without being burned or heated, i.e., through the front area of ​​the smoking article, may be the total volumetric flow rate of air that enters in a direction perpendicular to the longitudinal direction of the smoking article. For example, the total volumetric flow rate of air that enters the smoking article without being burned or heated, i.e., through the wrapper, may be the total volumetric flow rate of air that enters the smoking article.

[0068] The content of components in the total particulate matter (TPM) of the captured smoke can be analyzed using GC / MS (gas chromatography-mass spectrometry). For example, in the case of tar or nicotine, the Cambridge filter (Cambridge Felter Pad (CFP)) containing the smoke components is immersed in IPA (Isopropyl Alcohol) for a specified period of time (e.g., 20 minutes to 16 hours), and in the case of PG and Gly, the Cambridge filter (Cambridge Felter Pad (CFP)) containing the smoke components is immersed in methanol for a specified period of time (e.g., 2 hours to 16 hours), and then treated with a shaker device and passed through a PTFE (Polytetrafluoroethylene) syringe filter to remove impurities. Then, the content of components contained in the total particulate matter (TPM) of the captured smoke can be measured using GC / MS equipment. The soaking time may be more than 20 minutes, especially for tar or nicotine, and more than 2 hours for PG and Gly.

[0069] The amount of components (particularly the amount of nicotine components) remaining inside a pre-filter segment (particularly, a lyocell filter and / or lyocell tow, particularly a pre-filter segment) and / or the segments, etc. after smoking can be measured by immersing the filter and / or the segments, etc. (particularly the pre-filter segment) in water (distilled water) after smoking to extract the residual components (particularly the nicotine components) and analyzing them using a GC / MS equipment. At this time, the filter and / or the segments, etc. (particularly the pre-filter segment) are immersed in a container containing distilled water overnight (for example, for 12 to 16 hours), and a solution containing the components thus extracted can be utilized for GC / MS analysis. The immersion time can be particularly 16 hours.

[0070] The above GC / MS may be, for example, a measuring device from Agilent.

[0071]

[0072] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the attached drawings.

[0073]

[0074] FIG. 1 is a schematic drawing of a smoking article according to one embodiment of the present invention, and FIG. 2 is a schematic drawing of a smoking article according to another embodiment of the present invention.

[0075] Referring to FIG. 1, a smoking article (100) may include a medium portion (110), a mouthpiece portion (140), and a front filter segment (111). In some embodiments, the smoking article (100) may further include at least one of a support structure (120), a cooling structure (130), and a wrapper (150). In some embodiments, the smoking article (100) may further include the support structure (120) and the cooling structure (130). The cooling structure (130) may be disposed downstream (or on the other side, the other side meaning the opposite side of one side) of the medium portion (110) and spaced apart from the medium portion (110). The support structure (120) may be disposed between the medium portion (110) and the cooling structure (130). In particular, the smoking article (100) may include a medium portion (110), a shear filter segment (111) disposed upstream (or on one side) of the medium portion (110) and in contact with the medium portion (110), and a mouthpiece portion (140) disposed on one side (i.e., downstream) of the support structure (120) with a cooling structure (130) therebetween. That is, the smoking article (100) may include a medium portion (110), a shear filter segment (111) disposed upstream (or on one side) of the medium portion (110) and in contact with the medium portion (110), and a mouthpiece portion (140) disposed in an opposite direction of the support structure (120) with respect to the cooling structure (130). In some embodiments, the smoking article (100) may include a wrapper (150) that surrounds at least a portion of the medium portion (110), the support structure (120), the cooling structure (130), the mouthpiece portion (140), and the shear filter segment (111). In some embodiments, the smoking article (100) may be arranged in the following order along the longitudinal direction of the smoking article (100): the shear filter segment (111), the medium portion (110), the mouthpiece portion (140). In some embodiments, the smoking article (100) may be arranged in the following order along the longitudinal direction of the smoking article (100): the shear filter segment (111), the medium portion (110), the cooling structure (130), and the mouthpiece portion (140).In some embodiments, the smoking article (100) may be arranged in the following order: a shear filter segment (111), a medium portion (110), a support structure (120), a cooling structure (130), and a mouthpiece portion (140) along the length of the smoking article (100).

[0076]

[0077] The medium (110) may include an aerosol-forming substrate. The medium (110) may generate an aerosol when heated by including the aerosol-forming substrate. The length of the medium (110) may be about 5 mm to 14 mm (e.g., 7 mm or 12 mm), but is not limited thereto. The medium (110) may be inserted into an aerosol-generating device and generate an aerosol when heated, and the generated aerosol (e.g., mainstream smoke) may be inhaled through the user's mouth.

[0078] In some embodiments, the aerosol-forming substrate may comprise tobacco material, although the processed form of the tobacco material may vary. For example, the aerosol-forming substrate may comprise a reconstituted tobacco sheet, such as a sheet of leaf. In some embodiments, the aerosol-forming substrate may comprise a sheet of leaf. In some embodiments, the aerosol-forming substrate may comprise a plurality of tobacco strands (also referred to as "cut fillers") formed by cutting the reconstituted tobacco sheet. In some embodiments, the medium portion (110) may be filled with a plurality of tobacco strands arranged in the same direction (e.g., parallel) and / or randomly. Further, in some embodiments, the aerosol-forming substrate may comprise leaf tobacco cut filler.

[0079] In some embodiments, the aerosol forming substrate may comprise a reconstituted tobacco sheet and / or leaf tobacco ash.

[0080] In some embodiments, the aerosol-forming substrate or medium (110) may include one or more humectants. The humectants may include, but are not limited to, glycerin and / or propylene glycol.

[0081] In some embodiments, the aerosol forming substrate or medium portion (110) may contain one or more flavoring agents (or, may be referred to as "flavoring agents") and / or other additives such as organic acids. For example, flavoring agents may be licorice, sucrose, fructose syrup, artificial sweeteners (e.g., Isosweet TM ), cocoa, lavender, cinnamon, cardamom, celery, fenugreek, cascarilla, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, mint oil, cinnamon, caraway, cognac, jasmine, chamomile, menthol, cinnamon, ylang-ylang, sage, spearmint, ginger, coriander and / or coffee, but are not limited thereto.

[0082]

[0083] The shear filter segment (111) is positioned upstream (on one side) of the medium portion (110), and the downstream side of the shear filter segment (111) may be in contact with the upstream side of the medium portion (110). The shear filter segment (111) may prevent the medium portion (110) from escaping to the outside of the smoking article (100). It may also prevent the aerosol liquefied from the medium portion (110) during smoking from flowing into the aerosol generating device (reference numeral '1000' of FIGS. 5 to 7). In some embodiments, the length of the shear filter segment (111) may be, but is not limited to, 3 mm to 12 mm (for example, 5 mm or 10 mm).

[0084] In one embodiment, the shear filter segment (111) may comprise or be composed of lyocell tow comprising a plurality of lyocell fibers.

[0085] In the present invention, the lyocell fibers included in the shear filter segment (111) are environmentally friendly fibers made from cellulose extracted from wood pulp. The lyocell tow may refer to a bundle formed by cross-linking adjacent lyocell fibers.

[0086] In some embodiments, the lyocell fibers may have a Y-shaped cross-section with three protrusions branching from the center, a cross-shaped cross-section with four protrusions, and / or a star-shaped cross-section with five or more protrusions, or may have an O-shaped cross-section, but are not limited thereto.

[0087] Since the pre-filter segment (111) according to the present invention is configured to include a lyocell material, compared to a case where the pre-filter segment (111) is configured to include cellulose acetate, the pre-filter segment (1110) may not be deformed by high heat applied during smoking due to the heat-resistant properties of the lyocell material. That is, since the pre-filter segment (111) includes or is configured to include lyocell tow that does not melt even at high temperatures, the high heat-resistant properties of the lyocell tow can minimize deformation of the structure of the pre-filter segment (111) even when a heating rod is inserted into the pre-filter segment (111) to apply heat for heating and / or when heat is applied to the pre-filter segment (111) disposed adjacent to the medium portion (110) by an external heater. Accordingly, the smoke components are generally maintained uniformly over the smoking time, thereby providing the user with a more improved smoking experience.

[0088] In addition, since the shear filter segment (111) according to the present invention is configured to include or be made of lyocell material, when the shear filter segment (111) is configured of paper, the heater rod (designated '1300' in FIG. 5) can be easily inserted for heating due to the characteristics of the plurality of lyocell fibers that are randomly arranged, which is different from a paper filter having a grain direction.

[0089] In some embodiments, the shear filter segment (111) may further comprise one or more moisturizers dispersed throughout the lyocell tow. The moisturizers may be uniformly dispersed throughout the entire area of ​​the lyocell tow. The moisturizers may include, but are not limited to, glycerin and / or propylene glycol.

[0090]

[0091] The support structure (120) is located downstream of the medium portion (110) (i.e., the other side opposite to one side), and the upstream side of the support structure (120) may be in contact with the downstream side of the medium portion (110). The support structure (120) may function as a support member for the medium portion (110). For example, when a heating element of an aerosol generating device is inserted / inserted into the medium portion (110) and aligned to the outside of the medium portion (110), the support structure (120) may function to prevent the medium portion (110) from moving downstream. The support structure (120) may also function as a passage for aerosol (e.g., mainstream smoke) formed in the medium portion (110).

[0092] In some embodiments, the support structure (120) includes a tubular structure having a hollow space (120H) formed therein, which can function as a channel for the aerosol (i.e., through which the aerosol moves). The hollow space (120H) can extend along the longitudinal direction of the support structure (120). The hollow space (120H) is located at the center of a cross-section perpendicular to the longitudinal direction of the support structure (120) and can extend along the longitudinal direction of the support structure (120). The hollow space (120H) and the support structure (120) can have a coaxial structure along the longitudinal direction. The length of the support structure (120) can be about 8 mm to 14 mm (e.g., 10 mm or 12 mm), but is not limited thereto. In some embodiments, the length of the support structure (120) may be shorter than or equal to the length of the cooling structure (130) described below, but is not limited thereto.

[0093] The upstream end of the tubular structure included in the support structure (120) may be in contact with the downstream end of the tubular structure included in the cooling structure (130). In other words, one end located on one side (downstream) of the support structure (120) may be in contact with an end located on the other side (upstream) opposite to one side of the cooling structure (130), and the other end located on the other side (upstream) of the support structure (120) may be in contact with one end of the medium portion (110). Accordingly, the aerosol formed in the medium portion (110) may be moved toward the mouthpiece portion (140) (i.e., in the downstream direction) through the hollow portions (120H, 130H).

[0094] The support structure (120) may include at least one of cellulose acetate and lyocell. In particular, the support structure (120) may include a tubular structure made of cellulose acetate and / or a tubular structure made of lyocell including a plurality of lyocell fibers. In some embodiments, the support structure (120) may be a tubular filter made of cellulose acetate fibers or a tubular filter made of lyocell fibers. In some embodiments, the support structure (120) may be a tubular structure (e.g., a tubular filter) made of cellulose acetate fibers. In some embodiments, the support structure (120) may be a tubular structure (e.g., a tubular filter) made of lyocell including a plurality of lyocell fibers. The support structure (120) may effectively prevent downstream movement of the medium portion (110) when a heating element is inserted, and may also provide a filtration and cooling effect for the aerosol.

[0095] Preferably, the support structure (120) may include a tubular structure comprising or made of lyocell tow including a plurality of lyocell fibers. However, without limitation thereto, alternatively, or in addition, the support structure (120) may also include a tubular structure comprising or made of a cellulose acetate material. Since the support structure (120) includes or is made of lyocell tow having a hollow interior and including a plurality of lyocell fibers, the support structure (120) can prevent deformation of the support structure (120) due to heat applied to heat the smoking article (100) and / or high-temperature aerosol passing through the hollow interior (120H) of the support structure (120) due to the high heat resistance of the lyocell tow that does not melt even at high temperatures. Accordingly, the support structure (120) can maintain its shape while smoking, so that the smoke component passing through the hollow portion (120H) of the support structure (120) can be maintained uniformly without variation depending on the smoking time, thereby providing a more improved smoking experience to the user.

[0096] Meanwhile, it may be desirable for the support structure (120) to be manufactured to have appropriate hardness and / or durability for its supporting role. In some embodiments, when the support structure (120) includes cellulose acetate, the hardness of the support structure (120) may be controlled by adjusting the amount of plasticizer added when manufacturing the support structure (120) using the cellulose acetate. In addition, as the inner diameter of the support structure (120) increases (for example, as the difference between the outer diameter and the inner diameter of the support structure (120) decreases), the content of the added plasticizer may increase. In some other embodiments, the support structure (120) may be manufactured by inserting one or more structures, such as films and / or tubes, of the same or different types of materials into the interior (particularly, the hollow body (120H)).

[0097] In some other embodiments, when the support structure (120) includes lyocell fibers, the support structure (120) may be a lyocell filter having a hollow space (120H) formed therein and a binder added thereto. Unlike cellulose acetate, lyocell fibers do not contain a plasticizer that hardens the lyocell fibers, and thus, by adding a binder instead, the support structure (120) can be provided with appropriate hardness. That is, by further including a binder in the support structure (120), excellent hardness can be achieved even though it is a lyocell filter configured to include lyocell tow.

[0098] In some embodiments, the binder may include at least one of a cellulose-based binder, a vinyl-based binder, a polyester-based binder, a dextrin-based binder, a starch-based binder, guar gum, xanthan gum, gum arabic, carrageenan, konjac, and agar, but is not limited thereto as long as it is a material capable of binding between a plurality of lyocell fibers to impart appropriate hardness. For example, the cellulose-based binder may include hydroxypropylmethylcellulose (HPMC), ethylcellulose (EC), methylcellulose (MC), carboxymethylcellulose (CMC), etc., the vinyl-based binder may include polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), ethylene vinyl acetate (EVAc), etc., the polyester-based binder may be a polyester containing at least one selected from the group consisting of alkylene, arylene, and heteroarylene having 5 to 12 carbon atoms, the dextrin-based binder may include dextrin, etc., and the starch-based binder may include starch (e.g., tapioca, corn, wheat, potato, sweet potato, etc.), cationic starch, esterified starch, etc., but is not limited thereto.

[0099] In some embodiments, the binder may include at least one of a polyester, hydroxypropylmethylcellulose (HPMC), ethylcellulose (EC), methylcellulose (MC), carboxymethylcellulose (CMC), polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), ethylene vinyl acetate (EVAc), dextrin, tapioca starch, corn starch, wheat starch, potato starch, sweet potato starch, cationic starch, esterified starch, guar gum, xanthan gum, gum arabic, carrageenan, konjac, and agar, wherein the polyester comprises one or more selected from the group consisting of alkylene, arylene, and heteroarylene having 5 to 12 carbon atoms.

[0100] In some embodiments, the support structure (120) may be a flavored filter to which a flavoring agent such as menthol is added (i.e., flavored). In this case, the flavor development of the smoking article (100) may be enhanced. In some embodiments, the support structure (120) may be a flavored filter to which menthol is added (i.e., flavored).

[0101] The cooling structure (130) can function as a cooling member for high-temperature aerosol generated as the medium portion (110) is heated. In particular, the cooling structure (130) can include a tubular structure having a hollow space (130H) formed therein, and can cool the aerosol passing through the hollow space (130H). The hollow space (130H) can extend along the longitudinal direction of the cooling structure (130). The hollow space (130H) is located at the center of a cross-section perpendicular to the longitudinal direction of the cooling structure (130) and can extend along the longitudinal direction of the cooling structure (130). The hollow space (130H) and the cooling structure (130) can have a coaxial structure along the longitudinal direction. The hollow portion (120H) of the support structure (120) and the hollow portion (130H) of the cooling structure (130) are respectively positioned at the center of a cross-section perpendicular to the longitudinal direction of the support structure (120) and the cooling structure (130), and may extend along the longitudinal direction of the support structure (120) and the cooling structure (130). The hollow portion (120H) of the support structure (120) and the hollow portion (130H) of the cooling structure (130) may extend along the same axis along the longitudinal direction. The hollow portion (120H) of the support structure (120) and the hollow portion (130H) of the cooling structure (130) may have the same or different diameters in a cross-section perpendicular to the axis, respectively. In particular, the aerosol formed in the medium portion (1130) can move through the hollow portion (120H) of the support structure (120) to the hollow portion (130H) of the cooling structure (130) and move in the direction of the mouthpiece portion (140) (i.e., downstream). Accordingly, the user can inhale an aerosol of an appropriate temperature, and the mainstream smoke can be smoothly aerosolized, thereby improving the amount of vaporization.

[0102] In some embodiments, the cooling structure (130) may include at least one of a tubular structure made of paper, a tubular structure made of cellulose acetate, and a tubular structure made of lyocell. The length of the cooling structure (130) may be about 12 mm to 16 mm (e.g., 14 mm), but is not limited thereto.

[0103] Preferably, the cooling structure (130) may include a tubular structure comprising or made of lyocell tow including a plurality of lyocell fibers. However, the cooling structure (130) is not limited thereto, and alternatively, or in addition, the cooling structure (130) may also include a tubular structure and / or a pipe made of cellulose acetate. Since the cooling structure (130) includes or is made of lyocell tow having a hollow space therein and including a plurality of lyocell fibers, the cooling structure (130) can prevent deformation of the cooling structure (130) due to heat applied to heat the smoking article (100) and / or high-temperature aerosol passing through the hollow space (130H) of the cooling structure (130) due to the high heat resistance of the lyocell tow that does not melt even at high temperatures. Accordingly, the cooling structure (130) can maintain its shape while smoking, so that the smoke components passing through the hollow portion (130H) of the cooling structure (130) can be maintained uniformly without variation depending on the smoking time, thereby providing a more improved smoking experience to the user. When the cooling structure (130) is configured to include lyocell tow, the cooling structure (130) may further include one or more binders dispersed in the lyocell tow to impart a predetermined hardness.

[0104] In some embodiments, the binder included in the cooling structure (130) may include, but is not limited to, the exemplary materials listed as the binder included in the support structure (120).

[0105] In some embodiments, the binder included in the cooling structure (130) may be the same as or different from the binder included in the support structure (120).

[0106] In some embodiments, the binder included in the cooling structure (130) may include at least one selected from the group consisting of alkylene, arylene and heteroarylene having 5 to 12 carbon atoms, polyester, hydroxypropylmethylcellulose (HPMC), ethylcellulose (EC), methylcellulose (MC), carboxymethylcellulose (CMC), polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), ethylene vinyl acetate (EVAc), dextrin, tapioca starch, corn starch, wheat starch, potato starch, sweet potato starch, cationic starch, esterified starch, guar gum, xanthan gum, gum arabic, carrageenan, konjac and agar.

[0107] The mouthpiece (140) is a mouthpiece that comes into contact with the user's mouth and can serve as a filter that ultimately delivers the aerosol delivered from upstream to the user. The mouthpiece (140) may be located downstream of the cooling structure (130), and the upstream portion may be in contact with the downstream portion of the cooling structure (130), and / or may form the downstream end of the smoking article (100).

[0108] In some embodiments, the mouthpiece portion (140) may be manufactured from a cellulose acetate filter and / or a lyocell filter. That is, the mouthpiece portion (140) may be manufactured using cellulose acetate fibers (i.e., cellulose acetate tow) as a filter material and / or using lyocell fibers (i.e., lyocell tow) as a filter material. Although not shown, the mouthpiece portion (140) may also be manufactured from a recessed filter. The length of the mouthpiece portion (140) may be about 10 mm to 14 mm (e.g., 12 mm), but is not limited thereto.

[0109] In some embodiments, the mouthpiece portion (140) may include at least one capsule. Here, the capsule may have a structure in which a liquid containing a flavoring agent is encapsulated by a film. For example, the capsule may have a spherical or cylindrical shape.

[0110] For reference, the support structure (120), the cooling structure (130), and the mouthpiece portion (140) can all function as filters for aerosols, and each component may be referred to as a “filter segment” to emphasize its function as a filter. For example, the support structure (120), the cooling structure (130), and the mouthpiece portion (140) may be referred to as a first filter segment, a second filter segment, and a third filter segment, respectively.

[0111] The wrapper (150) surrounds and can wrap at least one of the medium portion (110), the support structure (120), the cooling structure (130), the front filter segment (111), and the mouthpiece portion (140). Although not shown, at least one of the medium portion (110), the support structure (120), the cooling structure (130), the front filter segment (111), and the mouthpiece portion (140) may be wrapped with a separate wrapper before being wrapped by the wrapper (150). For example, the medium portion (110) may be wrapped by a medium portion wrapper (not shown), and the support structure (120), the cooling structure (130), and the mouthpiece portion (140) may each be wrapped by a first filter wrapper (not shown), a second filter wrapper (not shown), and a third filter wrapper (not shown), respectively. However, the method of wrapping the smoking article (100) and its components is not limited thereto and may vary.

[0112] In some embodiments, the wrapper (150) may be formed with perforations (160, see FIG. 1) arranged along the perimeter of the cooling structure (130), or may not have perforations (no perforations, see FIG. 2). In some embodiments, the wrapper (150) may be formed with perforations (160, see FIG. 1) arranged along the perimeter of the cooling structure (130), particularly along the perimeter of a cross-section perpendicular to the longitudinal direction of the cooling structure (130). When perforations are formed in the wrapper (150), outside air may be introduced into the cooling structure (130) through the plurality of perforations (160). The plurality of perforations (160) may serve to lower the surface temperature of the mouthpiece portion and the temperature of mainstream smoke delivered to the smoker through the introduction of outside air. However, the present invention is not limited thereto, and the wrapper (150) may not have perforations. Even if no perforations are formed in the wrapper (150), as described later, the moisture absorption performance in the mainstream smoke is excellent due to the excellent moisture affinity of the lyocell material constituting the support structure (120), so that the heat sensation of the mainstream smoke passing through the support structure (120) can be significantly reduced.

[0113]

[0114] Hereinafter, the composition and resulting effects of the present invention will be described in more detail through examples and comparative examples. However, these examples are intended to more specifically illustrate the present invention, and the scope of the present invention is not limited to these examples.

[0115]

[0116] Example 1 and Comparative Example 1

[0117] A lyocell filter was manufactured using lyocell tow having a single denier of 3.33 dtex (mono denier of 3.0) and a total denier of 3,889 tex (total denier of 35,000) under the conditions shown in Example 1 of Table 1, and a cellulose acetate filter was manufactured using cellulose acetate tow having a single denier of 3.00 dtex (mono denier of 2.7) and a total denier of 3,889 tex (total denier of 35,000) to which a plasticizer was added under the conditions shown in Comparative Example 1 of Table 1.

[0118]

[0119] Weight (mg) Circumference (mm) Suction resistance (mmH20) Example 157021.96350 Comparative example 154021.94387

[0120] Experimental Example 1. Evaluation of heat resistance according to filter material

[0121] In order to evaluate the heat resistance according to the filter material, the filters of Example 1 and Comparative Example 1 were heated to 250°C or higher by an external heating method under internal conditions of an internal temperature of about 22±2°C and an internal relative humidity of about 60±5%. The filter before heating was photographed and shown in Fig. 3(a), and the filter after heating was photographed and shown in Fig. 3(b).

[0122]

[0123] In Fig. 3(a), the left side is the filter of Comparative Example 1 before heating, and the right side is the filter of Example 1 before heating. In Fig. 3(b), the left side is the filter of Comparative Example 1 after heating, and the right side is the filter of Example 1 after heating.

[0124] Referring to Fig. 3, it can be confirmed that the cellulose acetate filter of Comparative Example 1 has a significantly different shape before and after heating, and that it melts due to heat after heating, leaving no substantial shape. On the other hand, it can be confirmed that the lyocell filter of Example 1 has a substantially similar shape before and after heating, with only some soot generated after heating. This confirms that cellulose acetate is a fiber with an amorphous structure and is weak to heat, causing complete melting, but lyocell has strong heat-resistant properties.

[0125]

[0126] Example 2 and Comparative Example 2

[0127] A lyocell filter having a length of 84 mm was manufactured by wrapping a lyocell tow having a single denier of 3.33 dtex (a mono denier of 3.0) and a total denier of 3,889 tex (a total denier of 35,000) with a paper roll under the conditions shown in Example 2 of Table 2, and a cellulose acetate filter having a length of 84 mm was manufactured by adding a plasticizer to a cellulose acetate tow having a single denier of 3.00 dtex (a mono denier of 2.7) and a total denier of 3,889 tex (a total denier of 35,000) and wrapping it with a paper roll under the conditions shown in Comparative Example 2 of Table 2.

[0128]

[0129] ClassificationWeight (mg)Circumference (mm)Circumference (%)Suction resistance (mmH20)Example 2925.922.0892.0414.1Comparative example 2900.021.96791.35404.4

[0130] Experimental Example 2. Evaluation of glycerin dispersibility (diffusion) according to filter material Using a nozzle, 4 mg / mm (i.e., 4 mg per 1 mm in the longitudinal direction) of glycerin was injected into each tow of the filters of Example 2 and Comparative Example 2 in a direction perpendicular to the longitudinal direction, and each filter injected with glycerin was conditioned for one week at an internal temperature of about 22±2°C and an internal relative humidity of about 60±5%. In order to confirm the degree of diffusion inside the filter, cross-sections of each filter of Example 2 and Comparative Example 2 were photographed and shown in Fig. 4.

[0131]

[0132] Referring to Fig. 4(a), it can be seen that the cross-section of the filter of Comparative Example 2, in which glycerin was injected into a cellulose acetate filter, shows that after the glycerin was added, it was concentrated only in the center and spread in only one direction, forming spots. On the other hand, referring to Fig. 4(b), it can be seen that the cross-section of the filter of Example 2, in which glycerin was injected into a lyocell filter, did not form spots. Accordingly, it can be seen that in the case of the cellulose acetate filter, glycerin did not move and diffuse smoothly within the cellulose acetate tow, but in the case of the lyocell filter, glycerin moved and diffused smoothly within the lyocell tow.

[0133]

[0134] Therefore, when the front filter segment (111) is formed of lyocell tow, even when a moisturizer (e.g., glycerin) is added to the front filter segment (111), it is suggested that the moisturizer is uniformly dispersed within the front filter segment (111) positioned at the frontmost end of the smoking article (100), thereby minimizing leakage to the outside from the front filter segment (111). In addition, it is suggested that during the storage and / or distribution process of the smoking article (100), since the moisturizer is uniformly dispersed within the lyocell tow, leakage of the moisturizer to the outside from the smoking article (100) is reduced, thereby preventing a decrease in the amount of vapor produced during smoking.

[0135]

[0136] Example 3

[0137] A lyocell filter was manufactured under the conditions shown in Table 3 below using lyocell tow having a single denier of 3.33 dtex (mono denier of 3.0) and a total denier of 3,889 tex (total denier of 35,000). The wrapper used in the manufacture of the filter was a roll paper (roll paper not treated with an oil-resistant coating) having a basis weight of 75 gsm.

[0138]

[0139] Weight (mg) Length (mm) Circumference (mm) Suction resistance (mmWG) Hardness (%) Example 3831.1011222.04713.991.43

[0140] Next, the filter of Example 3 was cut to 5 mm, and a heated cigarette (as a smoking article) having a structure of a front filter segment including the filter of Example 3 having a length of 5 mm, such as a smoking article (100) shown in FIG. 1, a medium portion having a length of 7 mm, a support structure made of a cellulose acetate material having a hollow inner diameter of 2.7 mm, an outer diameter of 7 mm, and a length of 10 mm, a cooling structure made of a tube having an inner diameter of 6 mm and a length of 14 mm, and a mouthpiece portion made of a cellulose acetate tow having a length of 12 mm was manufactured, and a smoking article was manufactured under the conditions shown in Table 4 below. Hereinafter, unless there is further explanation in this specification, PDC may refer to a value of suction resistance measured in a state where the medium section is open, the perforations of the filter section are blocked, and the inflow of external air is blocked, and PDO may refer to a value of suction resistance measured in a state where the medium section is open, the perforations of the filter section are not blocked, and the inflow of external air is allowed.

[0141]

[0142] ClassificationWeight(mg)Circumference(mm)Vent(%)PDO(mmH20)PDC(mmH20)Smoking article of Example 3579.522.69221.4469.780.5

[0143] (In Table 3 above, Vent refers to the ventilation rate (VR).) Experimental Example 3. Evaluation of aerosol components according to filter material

[0144]

[0145] The medium portion of the smoking article of Example 3 was heated to a heating temperature of 190°C to 280°C by an external heating method, and the total particulate matter (TPM), nicotine component, moisture content, etc. in the generated aerosol were measured, and the nicotine residue in the shear filter segment was measured, and the results are shown in Table 5 below.

[0146] In particular, the experiment was conducted in a smoking room (specifically, a temperature of about 21.9°C and a relative humidity of 64.3%) with an internal temperature of about 22±2°C and an internal relative humidity of about 60±5%, targeting a smoking article according to Example 3, and the smoking conditions were HC conditions (Puff volume: 55 ml / Puff frequency: 30 s / Puff duration: 2 s / Number of puffs: 9 puffs), and the generated smoke was captured and analyzed on a Cambridge filter (i.e., Cambridge filter pad (CFP)). The total particulate matter (TPM) is a value obtained by measuring the change in the weight of the Cambridge filter before smoking and after smoking using the smoking device, and for the remaining components, the captured smoke was analyzed by GC (Gas Chromatography).

[0147]

[0148] TPM (mg) Tar (mg) Nic (mg) PG (mg) Gly (mg) Moisture (mg) Nicotine residue in filter (mg) Example 329.4913.630.720.483.8115.150.19

[0149] Referring to Table 5 above, it can be confirmed that the amount of moisture transferred in the aerosol is 15.15 mg, which is excellent in reducing the heat sensation of the smoker, thereby improving the smoking quality of the user. In addition, it can be confirmed that the amount of nicotine remaining in the pre-filter segment after smoking is 0.19 mg, which is a result of some of the nicotine in the medium moving upstream in the opposite direction to the direction in which the mouthpiece is positioned after smoking. Accordingly, it can be confirmed that the pre-filter segment is arranged to border the upstream of the medium, thereby preventing the nicotine remaining in the pre-filter segment from escaping into the aerosol generating device, thereby preventing the aerosol generating device from being contaminated by the liquid generated during smoking and maintaining the aerosol generating device clean.

[0150] Figures 5 to 7 illustrate various types of aerosol generating devices to which smoking articles according to some embodiments of the present disclosure may be applied. In particular, Figure 5 is an exemplary schematic diagram illustrating a cigarette-type aerosol generating device (1000), and Figures 6 and 7 are exemplary schematic diagrams illustrating a hybrid aerosol generating device (1000) that utilizes both liquid and cigarette vapor. Hereinafter, the aerosol generating device (1000) will be briefly described.

[0151] As illustrated in FIG. 5, the aerosol generating device (1000) may be a device that generates an aerosol through a cigarette (2000) inserted into an internal space. Here, the cigarette (2000) may correspond to the smoking article (100) described above. Accordingly, the cigarette (2000) may include the medium portion (110), the shear filter segment (120), and the mouthpiece portion (140) described above. More specifically, when the cigarette (2000) is inserted into the aerosol generating device (1000), the aerosol generating device (1000) may operate the heater portion (1300) to generate an aerosol from the cigarette (2000). The generated aerosol may pass through the cigarette (2000) and be delivered to the user.

[0152] As illustrated, the aerosol generating device (1000) may include a battery (1100), a control unit (1200), and a heater unit (1300). However, only components related to the embodiment of the present disclosure are illustrated in FIG. 5. Therefore, a person skilled in the art to which the present disclosure pertains may recognize that other general components may be further included in addition to the components illustrated in FIG. 5. For example, the aerosol generating device (1000) may further include a display capable of outputting visual information, a motor for outputting tactile information, and / or at least one sensor (such as a puff detection sensor, a temperature detection sensor, and / or a cigarette insertion detection sensor). Hereinafter, each component of the aerosol generating device (1000) will be described.

[0153] The battery (1100) supplies power used to operate the aerosol generating device (1000). For example, the battery (1100) can supply power to heat the heater unit (1300) and supply power required for the control unit (1200) to operate. In addition, the battery (1100) can supply power required for the operation of displays, sensors, motors, etc. (not shown) installed in the aerosol generating device (1000).

[0154] Next, the control unit (1200) can control the overall operation of the aerosol generating device (1000). In particular, the control unit (1200) can control the operation of not only the battery (1100) and the heater unit (1300), but also other components that may be included in the aerosol generating device (1000). In addition, the control unit (1200) can check the status of each component of the aerosol generating device (1000) to determine whether the aerosol generating device (1000) is in an operable state.

[0155] The control unit (1200) may include at least one processor. The processor may be implemented as an array of multiple logic gates, or as a combination of a general-purpose microprocessor and a memory storing a program executable on the microprocessor. Furthermore, those skilled in the art will appreciate that the processor may be implemented using other types of hardware.

[0156] Next, the heater unit (1300) can heat the cigarette (2000) by power supplied from the battery (1100). For example, when the cigarette (2000) is inserted into the aerosol generating device (1000), the heating element of the heater unit (1300) can be inserted into a certain area inside the cigarette (2000) to increase the temperature of the aerosol forming material inside the cigarette (2000).

[0157] In some embodiments, the heater unit (1300) may alternatively, or in addition to, include an external heating element, as depicted in FIG. 5 . In this case, the heating element of the heater unit (1300) may be positioned externally of the cigarette (2000) inserted into the device (1000). Furthermore, as depicted, the heater unit (1300) may include multiple heating elements. For example, the heater unit (1300) may include multiple internal heating elements or multiple external heating elements. As another example, the heater unit (1300) may include one or more internal heating elements and / or one or more external heating elements.

[0158] The heating element may be formed of any material capable of electrical resistance and / or inductive heating. However, the present invention is not limited thereto, and any material that can be heated to a desired temperature under the control of the control unit (1200) may be used. Here, the desired temperature may be preset in the aerosol generating device (1000) or may be set to a desired temperature by the user.

[0159] Meanwhile, although FIG. 5 illustrates that the battery (1100), the control unit (1200), and the heater unit (1300) are arranged in a row along the longitudinal direction, the internal structure of the aerosol generating device (1000) is not limited to the example illustrated in FIG. 5. In other words, the arrangement of the battery (1100), the control unit (1200), and the heater unit (1300) may vary depending on the design of the aerosol generating device (1000).

[0160] Hereinafter, a hybrid aerosol generating device (1000) will be described with reference to FIGS. 6 and 7. For clarity of the present disclosure, descriptions of overlapping components (1100, 1200, 1300) will be omitted.

[0161] As illustrated in FIG. 6 or FIG. 7, the aerosol generating device (1000) may further include a vaporizer (1400).

[0162] When a cigarette (2000) is inserted into an aerosol generating device (1000), the aerosol generating device (1000) can operate the heater unit (1300) and / or the vaporizer (1400) to generate an aerosol from the cigarette (2000) and / or the vaporizer (1400). The aerosol generated by the heater unit (1300) and / or the vaporizer (1400) can pass through the cigarette (2000) and be delivered to the user. When the cigarette (2000) is inserted into the aerosol generating device (1000), the heating element of the heater unit (1300) can be placed in contact with or adjacent to an outer portion of the cigarette (2000) to increase the temperature of the aerosol forming substrate within the cigarette (2000) from the outside.

[0163] The vaporizer (1400) can heat the liquid composition to generate an aerosol, and the generated aerosol can be delivered to the user through the cigarette (2000). In other words, the aerosol generated by the vaporizer (1400) can travel along the airflow passage of the aerosol generating device (1000), and the airflow passage can be configured so that the aerosol generated by the vaporizer (1400) can pass through the cigarette (2000) and be delivered to the user.

[0164] The vaporizer (1400) may include, but is not limited to, a liquid reservoir, a liquid delivery means, and a liquid heating element. For example, the liquid reservoir, the liquid delivery means, and the liquid heating element may be included as independent modules in the aerosol generating device (1000).

[0165] The liquid reservoir can store a liquid composition (i.e., a liquid aerosol-forming substrate). The liquid reservoir can be constructed to be detachable from / attached to the vaporizer (1400) or can be constructed integrally with the vaporizer (1400).

[0166] Next, the liquid delivery means can deliver the liquid composition from the liquid storage tank to the liquid heating element. For example, the liquid delivery means can be a wick such as, but not limited to, cotton fibers, ceramic fibers, glass fibers, or porous ceramics.

[0167] A liquid heating element is an element for heating a liquid composition delivered by a liquid delivery means. For example, the liquid heating element may include, but is not limited to, a metal heating wire, a metal heating plate, a ceramic heater, etc. In addition, the liquid heating element may be composed of a conductive filament, such as a nichrome wire, and may be arranged in a structure that is wound around the liquid delivery means. The liquid heating element may be heated by the current supplied from the control unit (1200) and may transfer heat to the liquid composition in contact with the liquid heating element, thereby heating the liquid composition. As a result, an aerosol may be generated.

[0168] As illustrated in FIG. 6 or FIG. 7, the vaporizer (1400) and the heater unit (1300) may be arranged in parallel or series. However, the scope of the present disclosure is not limited to this arrangement.

[0169] For reference, the term vaporizer (1400) may be used interchangeably with terms such as cartomizer or atomizer in the relevant technical field.

[0170] The control unit (1200) can additionally control the operation of the vaporizer (1400), and the battery (1100) can additionally supply power so that the vaporizer (1400) can operate.

[0171] With reference to FIGS. 5 to 7, various types of aerosol generating devices (1000) to which smoking articles (100) according to some embodiments of the present disclosure can be applied have been described.

[0172] Although the embodiments of the present disclosure have been described with reference to the attached drawings, those skilled in the art will appreciate that the present disclosure can be implemented in other specific forms without changing the technical concepts or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of protection of the present disclosure should be interpreted by the claims below, and all technical ideas within a scope equivalent thereto should be interpreted as being included within the scope of the technical ideas defined by the present disclosure.

Claims

1. Medium; A shear filter segment disposed on one side of the medium and comprising a lyocell tow comprising a plurality of lyocell fibers; and Including a mouthpiece part spaced apart from the other side of the medium part, Smoking items.

2. In paragraph 1, Further comprising a cooling structure disposed between the medium portion and the mouthpiece portion, Smoking items.

3. In paragraph 2, Further comprising a support structure disposed between the medium portion and the cooling structure, Smoking items.

4. In paragraph 3, The above support structure comprises at least one of a lyocell filter and a cellulose acetate filter, The above support structure has a tube shape with a hollow space formed inside. Smoking items.

5. In paragraph 2, The above cooling structure comprises at least one of a lyocell filter, a pipe filter or a cellulose acetate filter, The above cooling structure has a tube shape with a hollow space formed inside. Smoking items.

6. In paragraph 1, The above shear filter segment further comprises a moisturizer, Smoking items.

7. In paragraph 6, The above moisturizer is dispersed throughout the entire area of the lyocell tow. Smoking items.

8. In paragraph 7, The above moisturizer comprises at least one of glycerin and propylene glycol. Smoking items.

9. In paragraph 1, The length of the above medium is 5 mm to 14 mm, The length of the above shear filter segment is characterized by being 3 mm to 12 mm. Smoking items.

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