SMOKING PRODUCT CONTAINING LYOCELL ROPE

Abstract

A smoking article is provided. The smoking article comprises: a first portion including an aerosol-generating substrate impregnated with an aerosol-generating element; a second portion including a tobacco element; a third portion including a cooling element; and a fourth portion including a filter element, wherein the first portion, the second portion, the third portion, and the fourth portion are sequentially aligned along the longitudinal direction of the smoking article, and the third portion comprises a lyocell tow including a plurality of lyocell fibers.

Description

Smoking articles containing lyocell tow

[0001] The present invention relates to a smoking article which applies lyocell tow to a cooling element of a smoking article, thereby preventing the cooling element from melting due to high temperatures caused by heat applied to heat the smoking article, thereby providing a user with an improved smoking experience.

[0002]

[0003] In smoking devices, the transfer of tobacco components (e.g., nicotine, tar) and the generation of vapor (atom) significantly impact the user's smoking experience. Typically, smoking devices operate by using a device to heat a stick to a high temperature of approximately 150-300°C. This heat is then transferred to a medium, which increases the temperature of the medium, allowing the smooth transfer of tobacco components such as nicotine. During this process, substances such as glycerin are heated to generate vapor, which is then delivered to the user for inhalation. However, if the device is set to a temperature below the boiling point of glycerin, atomization does not occur smoothly, limiting the transfer of tobacco components.

[0004]

[0005] To solve this problem, a cooling section (a segment of the filter section) has been conventionally incorporated into smoking articles to reduce discomfort caused by hot smoke when the user inhales.

[0006]

[0007] In the case where the cooling unit used in the past uses cellulose acetate (hereinafter abbreviated as “CA”) tow, the CA tow melts or deforms at a temperature of about 70℃ or higher and solidifies again. This phenomenon interferes with the smooth movement of smoke, generates a negative odor, and causes problems in that the cooling function is not properly performed.

[0008]

[0009] Therefore, to improve the performance of smoking devices, materials capable of withstanding heating temperatures of approximately 200-300°C are required to ensure smooth atomization and transfer of tobacco components. These materials must not melt or deform at high temperatures, yet effectively cool or reduce the temperature of the smoke, enhancing the user's smoking experience. Furthermore, materials that minimize dilution of tobacco components during the cooling process and deliver sufficient tar and nicotine during inhalation are required.

[0010]

[0011] The problem to be solved by the present invention is to provide a smoking article comprising a first part including an aerosol generating substrate impregnated with an aerosol generating element, a second part including a tobacco element, a third part including a cooling element, and a fourth part including a filter element, wherein the third part is formed of lyocell tow composed of a plurality of lyocell fibers, thereby preventing or minimizing deformation due to heat transferred from a heater that heats the smoking article or an aerosol generated within the smoking article due to the excellent heat resistance of the lyocell tow.

[0012] Another problem to be solved by the present invention is to provide a smoking article comprising a first part including an aerosol generating substrate impregnated with an aerosol generating element, a second part including a tobacco element, a third part including a cooling element, and a fourth part including a filter element, wherein the third part is formed of lyocell tow composed of a plurality of lyocell fibers, thereby effectively reducing the amount of moisture transferred during smoking due to the excellent moisture affinity of the lyocell tow, thereby reducing the heat felt by the user and maximizing the cooling effect.

[0013] Another problem to be solved by the present invention is to provide a smoking article in which the cooling element comprises a lyocell tow made of a plurality of lyocell fibers and a binder, thereby imparting appropriate hardness to the lyocell tow through the binder, thereby stably maintaining its shape despite the cooling element being a tubular structure made of lyocell tow.

[0014] 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.

[0015]

[0016] According to one aspect of the present application for solving the above problem, a smoking article comprises a first part including an aerosol generating substrate impregnated with an aerosol generating element, a second part including a tobacco element, a third part including a cooling element, and a fourth part including a filter element, wherein the first part, the second part, the third part, and the fourth part are sequentially aligned along a longitudinal direction of the smoking article, and the third part may include a lyocell tow including a plurality of lyocell fibers.

[0017] In some embodiments, the lyocell tow of the third portion may have a tube shape with a hollow cavity formed therein.

[0018] In some embodiments, the third portion may further comprise at least one binder dispersed throughout the plurality of lyocell tows.

[0019] 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, and a starch-based binder.

[0020] In some embodiments, the inner diameter of the third portion may be 10% to 90% of the outer diameter of the third portion.

[0021] In some embodiments, the outer diameter of the third portion may be from 6 mm to 10 mm.

[0022] In some embodiments, the inner diameter of the third portion may be from 2 mm to 6 mm, and the inner diameter of the third portion is smaller than the outer diameter.

[0023] In some embodiments, the outer diameter of the third portion may be from 6 mm to 10 mm, and the inner diameter of the third portion may be from 2 mm to 6 mm. The inner diameter of the third portion is smaller than the outer diameter.

[0024] In some embodiments, the inner diameter of the third portion may be 10% to 90% of the outer diameter of the third portion, the outer diameter of the third portion may be 6 mm to 10 mm, and the inner diameter of the third portion may be 2 mm to 6 mm.

[0025] In some embodiments, the fourth portion may comprise at least one of cellulose acetate and lyocell.

[0026] In some embodiments, the aerosol generating element may comprise at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol.

[0027] 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.

[0028] In another aspect of the present application, a method of manufacturing the smoking article described above is provided.

[0029]

[0030] According to one embodiment, a smoking article comprises a first part comprising an aerosol generating substrate impregnated with an aerosol generating element, a second part comprising a tobacco element, a third part comprising a cooling element, and a fourth part comprising a filter element, wherein the third part is formed of lyocell tow comprising a plurality of lyocell fibers, thereby preventing or minimizing deformation due to heat transferred from a heater heating the smoking article or an aerosol generated within the smoking article due to the excellent heat resistance of the lyocell tow.

[0031] In addition, in a smoking article comprising a first part including an aerosol generating substrate impregnated with an aerosol generating element, a second part including a tobacco element, a third part including a cooling element, and a fourth part including a filter element, the cooling element is formed of lyocell tow composed of a plurality of lyocell fibers, thereby effectively reducing the amount of moisture transferred during smoking due to the superior moisture affinity characteristics of lyocell tow compared to cellulose acetate tow, thereby reducing the heat sensation felt by the user and maximizing the cooling effect.

[0032] In addition, according to one embodiment, a smoking article includes a lyocell tow made of a plurality of lyocell fibers and a cooling element including at least one binder, thereby providing an appropriate hardness to the lyocell tow through the at least one binder. As a result, the cooling element (third portion) can have the effect of stably maintaining its shape despite being a tubular structure made of lyocell tow, and due to the stable shape maintenance, deformation of the cooling element (third portion) during storage and / or smoking of the smoking article can be prevented, thereby deteriorating the quality of the smoking experience.

[0033] 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.

[0034]

[0035] Figures 1 to 4 are drawings illustrating examples of aerosol generating articles inserted into an aerosol generating device.

[0036] FIG. 5 is a drawing illustrating a smoking article according to one embodiment.

[0037] FIG. 6 is a photograph of the third part (cooling element) of Example 1 and the third part (cooling element) of Comparative Example 2. FIG. 6(a) is a photograph of the third part (cooling element) of Comparative Example 1 and Example 1 before the experiment (before smoking), and FIG. 6(b) is a photograph of the third part (cooling element) of Comparative Example 1 and Example 1 after the experiment (after smoking).

[0038]

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] First, let's clarify some terms used in this specification.

[0045] 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.

[0046] In this specification, “smoking material” may mean any type of material that can be used in smoking articles.

[0047] In this specification, the term “user” may be used interchangeably with “consumer.”

[0048] 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.

[0049] 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).

[0050] As used herein, “lyocell filter” refers to a filter comprising or consisting of lyocell tow.

[0051] 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.

[0052] 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.

[0053] As used herein, the term "non-circular cross-section" is defined as a cross-section whose shape is not circular but includes a plurality of protrusions. For example, a cross-section in which a plurality of protrusions branch and / or extend from the center and / or the center of the cross-section may be referred to as a non-circular cross-section. Here, "protrusion" may mean a distinct, extended segment or arm extending outward from the central core or joint point of the lyocell fiber cross-section.

[0054] In some embodiments, the lyocell fibers may have a Y-shaped cross-section with three protrusions branching and / or extending from the center and / or center of the cross-section, a cruciform 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.

[0055] In some embodiments, the lyocell fibers may include three or more protrusions branching and / or extending from the center and / or the center of the cross-section.

[0056]

[0057] *In some embodiments, the lyocell fibers included in the lyocell tow may have a Y-shaped cross-section for use in cigarette filters.

[0058] In this specification, “hollow” may mean a channel extending along the longitudinal direction.

[0059] In this specification, "consisting of" an element may mean including or consisting of that element.

[0060] In this specification, a “tubular type rod” as a filter rod may refer to a filter rod that includes a hollow space inside, while a filter rod that does not include a hollow space inside may be referred to as a “cylindrical type rod.”

[0061] In this specification, a “recess-type rod” as a filter rod may refer to a filter rod having one or more pores.

[0062] In this specification, the hardness of the third part is a value that quantifies the degree to which the diameter of the third part is maintained when the third part is pressed with a certain level of force in a direction perpendicular to the longitudinal direction of the third part, and may be a percentage of the diameter of the third part after the force is applied compared to the diameter of the third part before the force is applied. For example, the hardness (%) of the third part can be calculated as (Da) / D × 100%. Here, D is the diameter of the third part, and a represents the distance lowered by a 300 g weight (i.e., the third part is pressed). The measurement value required for calculating the hardness is, for example, a DHT 200 of Filtrona Co., Ltd. TMcan be obtained using. In measuring the hardness, the force applied to the object in the third part can be considered as a value equivalent to the force applied to the smoking article by an actual user (e.g., when holding it).

[0063] 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.

[0064] 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.

[0065] In this specification, the “ventilation rate (hereinafter, “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.

[0066] In this specification, organic acid is a general term for organic compounds that are acidic.

[0067] In some embodiments, room temperature may mean 20° C. to 25° C.

[0068] In this specification, when no separate physical quantity is indicated, component % and component ratio mean weight % of component and weight ratio of component, respectively.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] The above GC / MS may be, for example, a measuring device from Agilent.

[0073] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the attached drawings.

[0074] Throughout this specification, “tobacco element” means an element comprising tobacco material.

[0075] Throughout this specification, “tobacco material” means any form of material containing components derived from tobacco leaves.

[0076] Throughout this specification, the term "cooling element" means an element that cools a substance. For example, the cooling element may cool an aerosol generated from an aerosol generating element or a tobacco element.

[0077] Throughout this specification, "filter element" means an element comprising a filtering material. For example, the filter element may comprise a plurality of fiber strands.

[0078]

[0079] Figures 1 to 4 are drawings illustrating examples of aerosol generating articles inserted into an aerosol generating device.

[0080] First, the aerosol generating device will be described with reference to FIGS. 1 to 3.

[0081] Referring to FIG. 1, the aerosol generating device (100) includes a battery (110), a control unit (120), and a heater (130). Referring to FIGS. 2 and 3, the aerosol generating device (100) further includes a vaporizer (140). In particular, a smoking article (200) can be inserted into the internal space of the aerosol generating device (100).

[0082] The aerosol generating device (100) illustrated in FIGS. 1 to 3 illustrates components related to the present embodiment. Accordingly, a person skilled in the art related to the present embodiment will understand that, in addition to the components illustrated in FIGS. 1 to 3, the aerosol generating device (100) may further include other general-purpose components.

[0083] Additionally, although FIGS. 2 and 3 illustrate that the aerosol generating device (100) includes a heater (130), the heater (130) may be omitted if desired. In some embodiments, the aerosol generating device (100) does not include a heater. In some embodiments, the battery (110), the control unit (120), and the vaporizer (140) are arranged sequentially, i.e., in a row, along the length of the smoking article (200).

[0084] FIG. 1 illustrates a battery (110), a controller (120), and a heater (130) arranged in a row. In some embodiments, the battery (110), the controller (120), and the heater (130) are sequentially arranged along the longitudinal direction of the smoking article (200). In addition, FIG. 2 illustrates a battery (110), a controller (120), a vaporizer (140), and a heater (130) arranged in a row along the longitudinal direction of the smoking article (200). In addition, FIG. 3 illustrates a vaporizer (140) and a heater (130) arranged in parallel. However, the internal structure of the aerosol generating device (100) is not limited to that illustrated in FIGS. 1 to 3. In other words, depending on the design of the aerosol generating device (100), the arrangement of the battery (110), the control unit (120), the heater (130), and the vaporizer (140) may be changed.

[0085] When a smoking article (200) is inserted into an aerosol generating device (100), the aerosol generating device (100) can operate a heater (130) and / or a vaporizer (140) to generate an aerosol from the smoking article (200) and / or the vaporizer (140). The aerosol generated by the heater (130) and / or the vaporizer (140) passes through the smoking article (200) and is delivered to the user.

[0086] If necessary, the aerosol generating device (100) can heat the heater (130) even when the smoking article (200) is not inserted into the aerosol generating device (100).

[0087] The battery (110) supplies power used to operate the aerosol generating device (100). For example, the battery (110) may supply power to heat the heater (130) and / or the vaporizer (140), and may supply power required for the control unit (120) to operate. In particular, the battery (110) may supply power required for the display, sensors, motors, etc. installed in the aerosol generating device (100) to operate.

[0088] The control unit (120) controls the overall operation of the aerosol generating device (100). In particular, the control unit (120) controls the operation of the battery (110), the heater (130), and the vaporizer (140), as well as other components included in the aerosol generating device (100). In particular, the control unit (120) can check the status of each component of the aerosol generating device (100) to determine whether the aerosol generating device (100) is in an operable state.

[0089] The control unit (120) includes 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.

[0090] The heater (130) can be heated by power supplied from the battery (110). For example, when the smoking article (200) is inserted into the aerosol generating device (100), the heater (130) can be located outside the smoking article (200). Accordingly, the heated heater (130) can increase the temperature of the aerosol generating material within the smoking article (200).

[0091] The heater (130) may be an electrically resistive heater. For example, the heater (130) may include an electrically conductive track, and the heater (130) may be heated as current flows through the electrically conductive track. However, the heater (130) is not limited to the above-described example, and any heater capable of heating to a desired temperature may be used without limitation. Here, the desired temperature may be preset in the aerosol generating device (100) or may be set to a desired temperature by the user.

[0092] Meanwhile, as another example, the heater (130) may be an induction heating heater. In particular, the heater (130) may include an electrically conductive coil for inductively heating an aerosol generating article, and the aerosol generating article may include a susceptor that can be heated by the induction heating heater.

[0093] For example, the heater (130) may include a tubular heating element, a plate-shaped heating element, a needle-shaped heating element, and / or a rod-shaped heating element, and may heat the inside and / or outside of the smoking article (200) depending on the shape of the heating element.

[0094] In particular, the aerosol generating device (100) may be provided with a plurality of heaters (130). At this time, the plurality of heaters (130) may be provided so as to be inserted into the interior of the smoking article (200) or may be provided on the exterior of the smoking article (200). In particular, some of the plurality of heaters (130) may be provided so as to be inserted into the interior of the smoking article (200), and the remainder may be provided on the exterior of the smoking article (200). In some embodiments, the heater (130) may heat the interior and exterior of the smoking article (200). In addition, the shape of the heater (130) is not limited to the shape illustrated in FIGS. 1 to 3, and may be manufactured in various shapes. In some embodiments, the heater (130) may include an electrical resistance heater and an induction heater.

[0095] The vaporizer (140) can heat the liquid composition to generate an aerosol, and the generated aerosol can be delivered to the user by passing through the smoking article (200). In other words, the aerosol generated by the vaporizer (140) can travel along the airflow passage of the aerosol generating device (100), and the airflow passage can be configured so that the aerosol generated by the vaporizer (140) can pass through the smoking article (200) and be delivered to the user.

[0096] For example, the vaporizer (140) may include, but is not limited to, a liquid reservoir, a liquid delivery means, and a heating element. For example, the liquid reservoir, the liquid delivery means, and the heating element may be included in the aerosol generating device (100) as independent modules.

[0097] The liquid storage unit can store a liquid composition. For example, the liquid composition can be a liquid containing a tobacco-containing substance including a volatile tobacco flavoring component, or alternatively, or in addition, a liquid containing a non-tobacco substance. The liquid storage unit can be constructed to be detachable from / attached to the vaporizer (140), or can be constructed integrally with the vaporizer (140).

[0098] For example, the liquid composition may include water, a solvent, ethanol, a plant extract, a fragrance, a flavoring agent, and / or a vitamin mixture. The flavoring agent may include, but is not limited to, menthol, peppermint oil, spearmint oil, and / or various fruit-flavored ingredients. The flavoring agent may include ingredients that can provide a variety of flavors and / or tastes to the user. The vitamin mixture may include, but is not limited to, a mixture of at least one of vitamin A, vitamin B, vitamin C, and vitamin E. In particular, the liquid composition may include an aerosol-forming agent such as glycerin and propylene glycol.

[0099] The liquid delivery means can deliver the liquid composition from the liquid storage to the heating element. For example, the liquid delivery means can be, but is not limited to, a wick such as cotton fibers, ceramic fibers, glass fibers, and / or porous ceramics.

[0100] A heating element is an element for heating a liquid composition delivered by a liquid delivery means. For example, the heating element may include, but is not limited to, a metal heating wire, a metal heating plate, and / or a ceramic heater. In particular, the 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 heating element may be heated by a current supply and may transfer heat to the liquid composition in contact with the heating element, thereby heating the liquid composition. As a result, an aerosol may be generated.

[0101] For example, the vaporizer (140) may be referred to as a cartomizer or an atomizer, but is not limited thereto.

[0102] Meanwhile, the aerosol generating device (100) may further include general-purpose components in addition to the battery (110), the control unit (120), the heater (130), and the vaporizer (140). For example, the aerosol generating device (100) may include a display capable of outputting visual information and / or a motor for outputting tactile information. In particular, the aerosol generating device (100) may include at least one sensor (such as a puff sensor, a temperature sensor, and / or an aerosol generating article insertion detection sensor). In particular, the aerosol generating device (100) may be manufactured in a structure in which external air may be introduced or internal gas may be discharged even when the smoking article (200) is inserted.

[0103] Although not illustrated in FIGS. 1 to 3, the aerosol generating device (100) may be configured as a system with a separate cradle. For example, the cradle may be used to charge the battery (110) of the aerosol generating device (100). Alternatively, or in addition, the heater (130) may be heated while the cradle and the aerosol generating device (100) are combined.

[0104] The smoking article (200) may be similar to a typical combustible cigarette. For example, the smoking article (200) may be divided into a first portion containing an aerosol-generating substance and a second portion containing a filter or the like. Optionally, the second portion of the smoking article (200) may also contain an aerosol-generating substance. For example, an aerosol-generating substance in the form of granules and / or capsules may be inserted into the first portion and, optionally, the second portion.

[0105] The entire first part may be inserted into the aerosol generating device (100), and the second part may be exposed to the outside. Alternatively, only a portion of the first part may be inserted into the aerosol generating device (100), or the entire first part and a portion of the second part may be inserted. The user may inhale the aerosol while holding the second part in their mouth. At this time, the aerosol is generated by external air passing through the first part, and the generated aerosol passes through the second part and is delivered to the user's mouth.

[0106] In some embodiments, outside air may be introduced through at least one air passage formed in the aerosol generating device (100). For example, the opening and / or the size of the air passage formed in the aerosol generating device (100) may be controlled by the user. Accordingly, the amount of vapor, the smoking sensation, etc. may be controlled by the user. As another example, outside air may be introduced into the interior of the smoking article (200) through at least one hole formed in the surface of the smoking article (200).

[0107]

[0108] Next, referring to FIG. 4, FIG. 4 illustrates an example of an aerosol generating device using an induction heating method.

[0109] Referring to FIG. 4, the aerosol generating device (100) includes a battery (110), a control unit (120), a coil (C), and a susceptor (S). In particular, at least a portion of a smoking article (200) can be accommodated in the cavity (V) of the aerosol generating device (100). The smoking article (200), the battery (110), and the control unit (120) of FIG. 4 may correspond to the smoking article (200), the battery (110), and the control unit (120) of FIGS. 1 to 3. In particular, the coil (C) and the susceptor (S) may be included in the heater (130). Therefore, redundant descriptions are omitted.

[0110] The aerosol generating device (100) illustrated in FIG. 4 illustrates components related to the present embodiment. Accordingly, those skilled in the art will appreciate that, in addition to the components illustrated in FIG. 4, the aerosol generating device (100) may further include other general-purpose components.

[0111] The coil (C) may be positioned around the cavity (V). In Fig. 4, the coil (C) is illustrated as being positioned to surround the cavity (V), but is not limited thereto.

[0112] When a smoking article (200) is accommodated in the cavity (V) of the aerosol generating device (100), the aerosol generating device (100) can supply power to the coil (C) so that the coil (C) generates a magnetic field. As the magnetic field generated by the coil (C) penetrates the susceptor (S), the susceptor (S) can be heated.

[0113] This induction heating phenomenon is a well-known phenomenon explained by Faraday's Law of Induction. Specifically, when the magnetic induction within a susceptor (S) changes, an electric field is generated within the susceptor (S), causing eddy currents to flow within the susceptor (S). The eddy currents generate heat within the susceptor (S) proportional to the current density and conductor resistance.

[0114] The susceptor (S) is heated by an eddy current, and an aerosol generating substance within a smoking article (200) can be generated by being heated by the heated susceptor (S). The aerosol generated from the aerosol generating substance passes through the smoking article (200) and is delivered to the user.

[0115] The battery (110) can supply power to the coil (C) to generate a magnetic field. The control unit (120) can be electrically connected to the coil (C).

[0116] The coil (C) may be an electrically conductive coil that generates a magnetic field by power supplied from a battery (110). The coil (C) may be arranged to surround at least a portion of the cavity (V). The magnetic field generated by the coil (C) may be applied to a susceptor (S) arranged at an inner end of the cavity (V).

[0117] The susceptor (S) is heated as a magnetic field generated from the coil (C) passes through it, and may include metal and / or carbon. For example, the susceptor (S) may include at least one of ferrite, a ferromagnetic alloy, stainless steel, and aluminum.

[0118] The susceptor (S) may include at least one of graphite, molybdenum, silicon carbide, niobium, a nickel alloy, a metal film, a ceramic such as zirconia, a transition metal such as nickel (Ni) or cobalt (Co), and a metalloid such as boron (B) or phosphorus (P). However, the susceptor (S) is not limited to the examples described above, and may be any material that can be heated to a desired temperature when a magnetic field is applied. Here, the desired temperature may be preset in the aerosol generating device (100), or may be set to a desired temperature by the user.

[0119] When a smoking article (200) is accommodated in the cavity (V) of the aerosol generating device (100), the susceptor (S) may be arranged to surround at least a portion of the smoking article (200). Accordingly, the heated susceptor (S) may increase the temperature of the aerosol generating material within the smoking article (200).

[0120] Although the susceptor (S) is depicted in FIG. 4 as being arranged to surround at least a portion of the aerosol generating article, the present invention is not limited thereto. For example, the susceptor (S) may include a tubular heating element, a plate-shaped heating element, a needle-shaped heating element, and / or a rod-shaped heating element, and depending on the shape of the heating element, may heat the interior and / or exterior of the smoking article (200).

[0121] In particular, a plurality of susceptors (S) may be arranged in the aerosol generating device (100). At this time, the plurality of susceptors (S) may be arranged to be inserted into the outside of the smoking article (200) or may be arranged to be inserted into the inside. In particular, some of the plurality of susceptors (S) may be arranged to be inserted into the inside of the smoking article (200), and the rest may be arranged to be inserted into the outside of the smoking article (200). In addition, the shape of the susceptor (S) is not limited to the shape illustrated in FIG. 4, and may be manufactured in various shapes.

[0122] FIG. 5 is a drawing illustrating a smoking article according to one embodiment.

[0123] Referring to FIG. 5, a smoking article (200) may include a first portion (210), a second portion (220), a third portion (230), and a fourth portion (240). In particular, the first portion (210), the second portion (220), the third portion (230), and the fourth portion (240) may each include an aerosol generating element, a tobacco element, a cooling element, and a filter element. In some embodiments, the first portion (210) may include an aerosol generating material, the second portion (220) may include a tobacco material and optionally one or more humectants, the third portion (230) may cool an airflow passing through the first portion (210) and the second portion (220), and the fourth portion (240) may include a filter material. Meanwhile, in order to emphasize the function of the third part (230) and the fourth part (240) as filters, the third part (230) may be referred to as a cooling structure (230) and the fourth part (240) may be referred to as a mouthpiece part (240).

[0124] Referring to FIG. 5, the first part (210), the second part (220), the third part (230), and the fourth part (240) may be arranged in order based on the longitudinal direction of the smoking article (200). Here, the longitudinal direction of the smoking article (200) may be a direction in which the length of the smoking article (200) extends. For example, the longitudinal direction of the smoking article (200) may be a direction from the first part (210) toward the fourth part (240). Accordingly, an aerosol generated from at least one of the first part (210) and the second part (220) may pass through the first part (210), the second part (220), the third part (230), and the fourth part (240) in order to form an airflow, and thus, a smoker may inhale the aerosol from the fourth part (240).

[0125] The first portion (210) may include an aerosol generating element. In particular, it may contain at least one other additive, such as a flavoring agent, a humectant, and / or an organic acid, and may contain a flavoring agent including menthol and / or a humectant. Here, the aerosol generating element may include, for example, at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. However, the present disclosure is not limited to the examples described above, and the present disclosure may include various types of aerosol generating elements widely known in the art.

[0126] The first portion (210) may include an aerosol-generating substrate impregnated with an aerosol-generating element. An example of the aerosol-generating substrate may include a crimped sheet, and the aerosol-generating element may be included in the first portion (210) in a state impregnated in the crimped sheet. In particular, at least one other additive substance, such as a flavoring agent, a humectant, and / or an organic acid, and / or a flavoring liquid may be included in the first portion (210) in a state absorbed into the crimped sheet.

[0127] The crimped sheet may be a sheet composed of a polymeric material. For example, the polymeric material may include at least one of paper, cellulose acetate, and polylactic acid. For example, the crimped sheet may be a paper sheet that does not emit an off-flavor due to heat even when heated to a high temperature. However, this is not limited thereto.

[0128] The first portion (210) may extend from the end of the smoking article (200) to a point about 7 to about 20 mm, and the second portion (220) may extend from the end of the first portion (210) to a point about 7 to about 20 mm. However, the lengths are not necessarily limited to these numerical ranges, and the lengths of each of the first portion (210) and the second portion (220) may be appropriately adjusted within a range that can be easily changed by a person skilled in the art. For example, the length of the first portion (210) may be about 10 mm, and the length of the second portion may be about 12 mm, but are not limited thereto.

[0129] The second portion (220) may include a tobacco element. The tobacco element may be a tobacco material in a specific form. For example, the tobacco element may take the form of tobacco cut filler, tobacco particles, tobacco sheets, tobacco beads, tobacco granules, tobacco powder, and / or tobacco extract. In particular, the tobacco material may include, for example, one or more of tobacco leaves, tobacco veins, expanded tobacco, cut tobacco, sheet-shaped tobacco, and reconstituted tobacco.

[0130] The third portion (230) can cool the airflow passing through the first portion (210) and the second portion (220). The third portion (230) can be made of a biodegradable polymer material and can have a cooling function.

[0131] In one embodiment, the third portion (230) may be made of lyocell fibers. In particular, the third portion (230) may be a lyocell filter composed of lyocell tow including a plurality of lyocell fibers. The third portion (230) may be a tubular structure having a hollow portion therein. The hollow portion may extend along the longitudinal direction of the third portion (230). The hollow portion of the third portion (230) may be located at the center of a cross-section perpendicular to the longitudinal direction of the third portion (230) and may be arranged to extend in the longitudinal direction. The hollow portion of the third portion (230) may have a coaxial structure with the third portion (230). The length and / or diameter of the third portion (230) may be variously determined depending on the shape of the smoking article (200). For example, the length of the third portion (230) may be appropriately employed within a range of 7 mm to 20 mm. Preferably, the length of the third portion (230) may be about 12 mm, but is not limited thereto.

[0132] The lyocell fibers included in the third section (230) of the present invention may be 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.

[0133] In some embodiments, the outer diameter of the third portion (230) may be approximately 6 mm to 10 mm, preferably 6.1 mm to 9 mm, more preferably 6.2 mm to 8 mm, even more preferably 6.3 mm to 7.8 mm, even more preferably 6.4 mm to 7.6 mm, even more preferably 6.6 mm to 7.4 mm, even more preferably 6.8 mm to 7.2 mm, and even more preferably 7 mm. The inner diameter (i.e., the diameter of the hollow) of the third portion (230) may be smaller than the outer diameter and may have any appropriate value within the range of approximately 2 mm to 6 mm, preferably 2.1 mm to 5.5 mm, more preferably 2.2 mm to 5 mm, even more preferably 2.3 mm to 4.5 mm, and even more preferably 2.4 mm to 4 mm, but is not limited thereto. Preferably, the inner diameter of the third portion (230) may be 2.5 mm to 3.0 mm or 3.5 mm to 4.0 mm, preferably 2.7 mm to 2.9 mm or 3.7 mm to 3.9 mm, more preferably 2.8 mm or 3.8 mm, but is not limited thereto.

[0134] In some embodiments, the inner diameter of the third portion (230) may be, but is not limited to, 10% to 90%, preferably 20% to 80%, more preferably 25% to 75%, more preferably 30% to 70%, or 35% to 75%, of the outer diameter of the third portion (230).

[0135] In some embodiments, lyocell fibers may have a non-circular cross-section. A non-circular cross-section is defined as a cross-section that is not circular but includes multiple protrusions. For example, a cross-section having multiple protrusions extending from a center may be considered non-circular.

[0136] 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.

[0137] In some embodiments, the third portion (230) may further include a binder. The binder may be dispersed throughout the lyocell tow constituting the third portion (230). In particular, the binder may be distributed throughout the entire area of ​​the lyocell tow constituting the third portion (230). The binder may function to bind between the plurality of lyocell fibers constituting the lyocell tow and impart appropriate hardness to the third portion (230). As described above, unlike cellulose acetate, lyocell does not have a plasticizer that hardens the lyocell fibers, and thus, by adding a binder instead, the third portion (230) may be imparted with appropriate hardness.

[0138] 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, and / or sweet potato, etc.), cationic starch, and / or esterified starch, etc., but is not limited thereto.

[0139] 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.

[0140] In some embodiments, the binder may be added to be dispersed within the lyocell tow during the manufacturing process for forming the third portion (230). For example, during the manufacturing process for forming the third portion (230), the binder may be added to the interior of the lyocell tow by wrapping the lyocell tow around the heater rod and spraying the binder onto the outer surface of the cylindrical lyocell tow formed to wrap the heater rod from the inside, or alternatively, or in addition, the binder may be added to the interior of the lyocell tow by adding the binder from the heater rod through the inner surface of the lyocell tow formed to wrap the heater rod from the inside, but the manufacturing method for forming the third portion (230) is not limited thereto.

[0141] In some embodiments, the hardness of the third portion (230) including the lyocell tow having the binder dispersed therein may be, but is not limited to, 60% to 99%, preferably 70% to 98.5%, more preferably 75% to 98%, even more preferably 80% to 97.5%, and even more preferably 85% to 97%. The hardness of the third portion (230) is a value that quantifies the degree to which the diameter of the third portion (230) is maintained when the third portion (230) is pressed with a certain level of force in a direction perpendicular to the longitudinal direction of the third portion (230), and may be a value that is a percentage ratio between the diameter of the third portion (230) before applying the force and the diameter of the third portion (230) after applying the force. Since the third part (230) has a hardness within the above range, the third part (230) can have the effect of stably maintaining its shape despite being a tubular structure composed of lyocell tow, and due to the stable shape maintenance of the third part (230), the third part (230) can be prevented from being deformed during storage and / or smoking of the smoking article (200), thereby deteriorating the quality of the smoking experience.

[0142] The smoking article (200) according to the present invention has a third part (230) made of lyocell tow and is formed in a tube shape with a hollow interior. As a result, the amount of moisture transferred during smoking is effectively reduced due to the superior moisture affinity of lyocell tow compared to cellulose acetate tow, thereby reducing the heat sensation felt by the user and maximizing the cooling effect. In addition, unlike paper tubes, no odor due to heat is generated, thereby improving the quality of smoking.

[0143] In addition, the excellent heat resistance of lyocell tow can effectively prevent or minimize deformation of the third part (230) due to heat transferred from a heater heating the smoking article (200) or an aerosol generated within the smoking article (200).

[0144]

[0145] The fourth part (240) may include a filter element. For example, the fourth part (240) may be a cellulose acetate filter. Meanwhile, there is no limitation on the shape of the fourth part (240). For example, the fourth part (240) may be a cylindrical rod or a tubular rod having a hollow portion therein. In particular, the fourth part (240) may be a recessed rod. If the fourth part (240) is composed of a plurality of segments, at least one of the segments may be manufactured to have a different shape from the other segments. The length of the fourth part (240) may be appropriately adopted within the range of 7 mm to 20 mm. Preferably, the length of the fourth part (240) may be about 14 mm, but is not limited thereto.

[0146]

[0147] The fourth portion (240) may be manufactured to produce a flavor. In some embodiments, a flavoring agent may be sprayed onto the fourth portion (240), or alternatively, or in addition, a separate fiber coated with a flavoring agent may be inserted into the interior of the fourth portion (240).

[0148] The smoking article (200) may include a wrapper (250) surrounding at least a portion of the first portion (210) to the fourth portion (240). In particular, the smoking article (200) may include a wrapper (250) surrounding all of the first portion (210) to the fourth portion (240). The wrapper (250) may be positioned at the outermost portion of the smoking article (200), and the wrapper (250) may be a single wrapper, but may also be a combination of multiple wrappers.

[0149] In some embodiments, the first portion (210) of the smoking article (200) may comprise a crimped, pleated sheet containing an aerosol generating material, the second portion (220) may comprise a tobacco material, such as sliver of leaf cut tobacco and optionally glycerin as a humectant, the third portion (230) may comprise lyocell tow comprising a plurality of lyocell fibers, and the fourth portion (240) may comprise cellulose acetate (CA) fibers, although the present disclosure is not necessarily limited thereto.

[0150]

[0151] Below, 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 illustrate the present invention more specifically, and the scope of the present invention is not limited to these examples.

[0152]

[0153] Example 1

[0154] A third part having a structure illustrated in FIG. 5 was manufactured using lyocell material. In particular, a cylindrical lyocell tow was formed to surround the heater rod using a heater rod, and a dextrin-based binder (dextrin) was injected into the lyocell tow through the inner surface of the lyocell tow from the heater rod, thereby manufacturing a third part having an inner diameter of about 3.8 mm and a circumference of 22.6 mm. Thereafter, a heated cigarette (as a smoking article of Example 1) having a first part having a length of 10 mm and composed of paper including an aerosol generating element, a second part having a length of 12 mm and composed of tobacco material, a third part of Example 1 having a length of 12 mm, and a fourth part having a length of 14 mm and composed of cellulose acetate, as in the smoking article (200) illustrated in FIG. 4, was manufactured, and the suction resistance was measured, which is shown in Table 1 below.

[0155] Unless otherwise specified herein, PDC may refer to a value of suction resistance measured while the second part is open, a perforation formed in any one of the first, third, and fourth parts is blocked, and the inflow of external air is blocked, and PDO may refer to a value of suction resistance measured while the second part is open, a perforation formed in any one of the first, third, and fourth parts is not blocked, and the inflow of external air is allowed.

[0156]

[0157] Comparative Example 1

[0158] A heated cigarette (as a smoking article of Comparative Example 1) was manufactured in the same manner as in Example 1, except that the third part was manufactured using cellulose acetate material, and the suction resistance was measured, which is shown in Table 1 below.

[0159]

[0160] Experimental Example 1. Physical Property Evaluation

[0161] In order to determine the change in the physical properties of smoking articles according to the materials constituting the third part, an experiment was conducted to measure the physical properties of smoking articles according to Comparative Example 1 and Example 1. In particular, the weight, circumference, and suction resistance Vent (Ventilation Rate) of smoking articles were measured, and the measurement results are shown in Table 1 below.

[0162]

[0163] ClassificationWeight(mg)Circumference(mm)PDO(mmH20)PDC(mmH20)Vent(%)Comparative Example 1524.622.652.387.053.4Example 1537.622.651.584.853.3

[0164] (In Table 1 above, Vent means ventilation rate (VR).)

[0165] *Referring to Table 1 above, it can be confirmed that smoking articles composed of lyocell tow and cellulose acetate, respectively, which constitute the third part, exhibit similar physical properties, and have similar ventilation rates (VR) and suction resistance characteristics that can be associated with heat resistance and cooling during smoking.

[0166]

[0167] Experimental Example 2. Moisture transfer amount (heat reduction effect) of smoking articles according to the material of the third part (cooling element)

[0168] In order to compare the amount of moisture transferred into the mainstream smoke of smoking articles according to the material constituting the third part, the second part (tobacco element) of the smoking articles according to Comparative Example 1 and Example 1 was heated at a heating temperature of 190°C to 280°C using an external heating method, and the moisture content (as moisture transferred amount) in the generated smoke was measured, and is shown in Table 2 below.

[0169] 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 smoking articles according to Comparative Example 1 and Example 1, 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 in a Cambridge filter (i.e., Cambridge filter pad (CFP)) and the moisture content captured in the Cambridge filter (pad) (as moisture transfer amount) was measured, which is shown in Table 2 below.

[0170]

[0171] Moisture content (mg) Comparative example 122.91 Example 116.19

[0172] Referring to Tables 1 and 2 above, it can be confirmed that the smoking articles of Example 1 and Comparative Example 1 have similar physical properties, but the moisture content of the mainstream smoke is lower in the smoking article of Example 1 than in the smoking article of Comparative Example 1. That is, since the amount of moisture transfer in the mainstream smoke of the smoking article of Example 1 is lower than that of the smoking article of Comparative Example 1, it can be confirmed that the heat sensation (hot sensation) transmitted to the user through the mainstream smoke during smoking is lower in the smoking article of Example 1, in which the third part is composed of a lyocell material, than in the smoking article of Comparative Example 1, in which the third part is composed of a cellulose acetate material. This can be expected to be due to the superior moisture affinity of the lyocell material compared to the cellulose acetate material, whereby the moisture generated during smoking passes through the third part composed of lyocell and is absorbed into the lyocell tow constituting the third part. That is, it can be confirmed that the smoking article of Example 1, in which the third part is composed of a lyocell material, is superior in reducing the heat sensation felt by a smoker when smoking compared to the smoking article of Comparative Example 1, in which the third part is composed of a cellulose acetate material.

[0173] Experimental Example 3. Evaluation of thermal deformation according to the material of the third part.

[0174]

[0175] In order to analyze the material deformation caused by heat generated when heating the tobacco element (second part) of the smoking article depending on the material constituting the third part, the second parts of the smoking articles according to Comparative Example 1 and Example 1 were heated in the same manner as in Experimental Example 2 (i.e., heated at a heating temperature of 190°C to 280°C using an external heating method), and then the smoking articles were disassembled and photographs of the third parts were taken, and these are shown in FIG. 5. FIG. 6(a) is a photograph of the third parts of Comparative Example 1 and Example 1 before the experiment (before smoking), in which the left side of FIG. 6(a) is the third part of Comparative Example 1, and the right side of FIG. 6(a) is the third part of Example 1. In addition, FIG. 6(b) is a photograph of the third parts of Comparative Example 1 and Example 1 after the experiment (after smoking), in which the left side of FIG. 6(b) is the third part of Comparative Example 1, and the right side of FIG. 6(b) is the third part of Example 1.

[0176]

[0177] Referring to Fig. 6(a), it can be confirmed that the appearance of the cellulose acetate third part of Comparative Example 1 and the lyocell third part of Example 1 before smoking are substantially the same.

[0178] Referring to Fig. 6(b), it can be confirmed that after smoking (i.e., after heating to a temperature of 190°C to 280°C and puffing), the third part of Comparative Example 1 was discolored to yellow, but the third part of Example 1 was not discolored. From this, it can be confirmed that the cellulose acetate material was discolored due to the heat generated within the smoking article during smoking, but the lyocell material was not discolored.

[0179] In addition, after smoking, the third part of Comparative Example 1 not only discolored but also melted and stuck (i.e., melted and stuck), and it was confirmed that the shape of the wrapper surrounding the third part was different and became smaller than the initial shape, but the third part of Example 1 was confirmed to be substantially the same as the shape of the wrapper and largely maintained the initial shape. That is, it was confirmed that the cellulose acetate material (Comparative Example 1) was deformed due to a melting phenomenon caused by heat, but the lyocell material (Example 1) was not deformed because it did not melt due to heat.

[0180] This is because the lyocell material has superior heat resistance compared to the cellulose acetate material, and thus can effectively prevent or minimize deformation caused by heat generated during smoking, heat within the aerosol, and / or heat for heating the tobacco element (second part). Accordingly, it can be confirmed that the third part of Example 1 has superior heat absorption performance than the third part of Comparative Example 1, and has the advantage of being able to maintain its original shape without material deformation based on its superior heat resistance.

[0181]

[0182] Examples 2 and 3

[0183] As in Example 1, a third part of Example 2 having an inner diameter of about 2.8 mm and a circumference of about 22.6 mm and a third part of Example 3 having an inner diameter of about 3.8 mm and a circumference of about 22.6 mm were manufactured, and a heated cigarette (as a smoking article of Example 2 and Example 3) having a first part composed of paper having a length of 10 mm and including an aerosol generating element, a second part having a length of 12 mm and including tobacco material, a third part of Example 2 or Example 3, and a fourth part having a length of 14 mm and consisting of cellulose acetate was manufactured, and the physical properties were measured and shown in Table 3 below.

[0184]

[0185] Classification (inner diameter) Weight (mg) Circumference (mm) PDO (mmH20) PDC (mmH20) Vent (%) Example 2 (2.8 mm) 537.522.58652.690.955.64 Example 3 (3.8 mm) 524.622.58452.387.054.43

[0186] (In Table 3 above, Vent means ventilation rate (VR).)

[0187] *Experimental Example 4. Analysis of smoke components according to the inner diameter of the third section

[0188]

[0189] In order to compare the smoke components according to the inner diameter of the third part, the second part of the smoking article according to Examples 2 and 3 was heated at a heating temperature of 190°C to 280°C using an external heating method, and the total particulate matter (TPM), nicotine components, moisture content, etc. were measured, and the results are shown in Table 4 below.

[0190] 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 smoking articles according to Examples 2 and 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).

[0191]

[0192] Classification TPM (mg) Tar (mg) Nic (mg) PG (mg) Gly (mg) Moisture (mg) Example 231.0312.880.390.190.8717.77 Example 330.1712.930.470.231.1116.77

[0193] Referring to Table 4 above, the smoke components transferred during smoking may differ depending on the difference in the inner diameter of the third part. In particular, the moisture transfer amount of the smoking article of Example 2, in which the inner diameter of the third part is 2.8 mm, is 17.77 mg, and the moisture transfer amount of the smoking article of Example 3, in which the inner diameter of the third part is 3.8 mm, is 16.77 mg. It can be confirmed that the smoking article of Example 3 has a greater moisture transfer amount than the smoking article of Example 2, and that the larger the inner diameter of the tubular structure, the better the effect of reducing the user's heat sensation. In addition, the atomization amount (sum of PG + Gly) of the smoking article of Example 2 is 1.06 mg, and the atomization amount (sum of PG + Gly) of Example 3 is 1.34 mg, and it can be confirmed that the smoking article of Example 3 has a greater atomization amount than the smoking article of Example 2. That is, it can be confirmed that the smoking article of Example 3, in which the inner diameter of the third part is 3.8 mm, has a similar Tar content to the smoking article of Example 2, in which the inner diameter of the third part is 2.8 mm, but has a lower moisture transfer amount and a higher atomization amount, so that the cooling effect is excellent and the atomization is excellent, thereby improving the user's smoking quality.

[0194] 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. A smoking article comprising a first part including an aerosol-forming substrate impregnated with an aerosol-forming element; a second part including a tobacco element; a third part including a cooling element; and a fourth part including a filter element, wherein the first part, the second part, the third part and the fourth part are sequentially arranged along the longitudinal direction of the smoking article, and the third part includes a lyocell tow including a plurality of lyocell fibres.

2. A smoking article according to paragraph 1, characterized in that the lyocell bundle of the third part has a tubular shape with a cavity formed therein.

3. A smoking article according to claim 1, characterized in that the third part additionally includes a binder dispersed in the lyocell tow.

4. The smoking article according to claim 3, characterized in that the binder comprises at least one of a cellulose binder, a vinyl binder, a polyester binder, a dextrin-based binder, and a starch-based binder.

5. A smoking article according to paragraph 2, characterized in that the internal diameter of the third part is from 10 to 90% of the external diameter of the third part.

6. A smoking article according to paragraph 2, characterized in that the outer diameter of the third part is from 6 mm to 10 mm, and the inner diameter of the third part is from 2 mm to 6 mm.

7. A smoking article according to claim 1, characterized in that the fourth part includes at least one of cellulose acetate and lyocell.

8. A smoking article according to claim 1, characterized in that the aerosol-forming element includes at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol.