Smoking article comprising lyocell tow

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 fourth portion includes 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 the filter element of the smoking article, thereby preventing the filter element from melting due to the high temperature caused by the heat applied to heat the smoking article, and effectively reducing the heat sensation generated during the initial puff, thereby providing a richer and improved smoking experience to the user.

[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] Meanwhile, the mouthpiece section has traditionally used cellulose acetate (hereinafter abbreviated as “CA”) tow to filter out components within the mainstream smoke. However, in the case of cellulose acetate (CA) tow, the CA tow melts or deforms at temperatures above approximately 70°C and then solidifies again, which hinders the smooth passage of smoke, generates an unpleasant odor, and prevents the filtering function from being properly performed.

[0005]

[0006] The problem to be solved by the present invention is to provide a smoking article that can provide a richer and improved smoking experience to the user by applying lyocell tow to the filter element of the smoking article, thereby preventing the filter element from melting due to the high temperature applied to heat the smoking article, and effectively reducing the heat sensation generated during the initial puff.

[0007] 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.

[0008]

[0009] According to one aspect of the present application for solving the above problem, 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 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 fourth part comprises a lyocell tow comprising a plurality of lyocell fibers.

[0010] In some embodiments, the single denier of the lyocell fibers included in the lyocell tow may be 2.22 to 16.67 dtex (mono denier of 2 to 15), and the total denier of the lyocell tow may be 1,111 to 4,444 tex (total denier of 10,000 to 40,000).

[0011] In some embodiments, the suction resistance of the fourth portion may be 7 mmWG to 22 mmWG based on a length of 14 mm of the fourth portion.

[0012] In some embodiments, the suction resistance of the fourth portion may be 9.5 mmWG to 19.5 mmWG based on a length of 14 mm of the fourth portion.

[0013] In some embodiments, the hardness of the fourth portion may be between 60% and 100%.

[0014] In some embodiments, the hardness of the fourth portion may be between 85% and 95%.

[0015] In some embodiments, the third portion may be characterized as being a tubular structure comprising a hollow portion.

[0016] In some embodiments, the third portion may include at least one of a tube filter and a paper tube comprising hollow portions, and comprised of polylactic acid (PLA) fibers, cellulose acetate fibers, and / or lyocell fibers.

[0017] 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.

[0018]

[0019] According to one embodiment of a smoking article, lyocell tow is applied to a filter element of the smoking article to prevent the filter element from melting due to high temperatures applied to heat the smoking article, and to effectively reduce the heat sensation generated during an initial puff, thereby providing a richer and improved smoking experience to the user.

[0020] 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.

[0021]

[0022] Figures 1 to 4 are drawings illustrating examples of aerosol generating articles inserted into an aerosol generating device.

[0023] FIG. 5 is a drawing illustrating a smoking article according to one embodiment.

[0024]

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] First, let's clarify some terms used in this specification.

[0031] 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.

[0032] In this specification, “smoking material” may mean any type of material that can be used in smoking articles.

[0033] In this specification, the term “user” may be used interchangeably with “consumer.”

[0034] 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.

[0035] 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).

[0036] As used herein, “lyocell filter” refers to a filter comprising or consisting of lyocell tow.

[0037] 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.

[0038] 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.

[0039] 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 having a shape 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.

[0040] 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.

[0041] 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.

[0042]

[0043] *In some embodiments, the lyocell fibers included in the lyocell tow may have a Y-shaped cross-section for use in cigarette filters.

[0044] In this specification, “hollow” may mean a channel extending along the longitudinal direction.

[0045] In this specification, "consisting of" an element may mean including or consisting of that element.

[0046] 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.”

[0047] In this specification, a “recess-type rod” as a filter rod may refer to a filter rod having one or more pores.

[0048] In the present specification, a wrapper (e.g., a roll) may surround at least a portion of the periphery surface of the longitudinal axis of each part (part) and / or structure of the smoking article.

[0049] In this specification, "basis weight" refers to the mass per unit area of ​​the paper and / or wrapper. The basis weight of the paper and / or wrapper can be determined by measuring the mass and area of ​​the paper and / or wrapper and dividing the mass of the paper and / or wrapper by the area. The unit of basis weight is gsm (gram per square meter), i.e. g / m 2 It could be.

[0050] 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.

[0051] 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.

[0052] In this specification, the hardness of each part (piece) and / or structure (e.g., the fourth part) of the smoking article is a value that quantifies the degree to which the diameter of the object is maintained when the object is pressed with a certain level of force in a direction perpendicular to the longitudinal direction of the object, and may be a percentage of the diameter of the object after the force is applied compared to the diameter of the object before the force is applied. For example, the hardness (%) of the object can be calculated as (Da) / D × 100%. Here, D is the diameter of the object, and a represents the distance lowered (i.e., the object is pressed) by a weight of 300 g. The measurement value required in calculating the hardness is, for example, a DHT 200 of Filtrona Co., Ltd. TM can be obtained using. In measuring hardness, the force applied to the object can be considered as a value equivalent to the force applied to the smoking article by an actual user (e.g., when holding it).

[0053] 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.

[0054] 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 outside air is introduced. 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.

[0055] In this specification, organic acid is a general term for organic compounds that are acidic.

[0056] In some embodiments, room temperature may mean 20° C. to 25° C.

[0057] In this specification, when no separate physical quantity is indicated, component % and component ratio mean weight % of component and weight ratio of component, respectively.

[0058] 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.

[0059] 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.

[0060] 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 through the wrapper.

[0061] 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.

[0062] The amount of components (particularly the amount of nicotine components) remaining inside the filter (particularly, lyocell filter and / or lyocell tow) and / or segments constituting the tobacco rod after smoking can be measured by immersing the tobacco rod, filter and / or segments in water after smoking to extract the residual components (particularly the nicotine components) and analyzing them using GC / MS equipment. In this case, the tobacco rod, filter and / or segments can be 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.

[0063] The above GC / MS may be, for example, a measuring device from Agilent.

[0064] In this specification, the unit "mmWG" means "mmH2O" as a unit of pressure.

[0065]

[0066] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the attached drawings.

[0067]

[0068] Throughout this specification, “tobacco element” means an element comprising tobacco material.

[0069] Throughout this specification, “tobacco material” means any form of material containing components derived from tobacco leaves.

[0070] 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.

[0071] Throughout this specification, "filter element" means an element comprising a filtering material. For example, the filter element may comprise a plurality of fiber strands.

[0072]

[0073] Figures 1 to 4 are drawings illustrating examples of aerosol generating articles inserted into an aerosol generating device.

[0074] First, the aerosol generating device will be described with reference to FIGS. 1 to 3.

[0075] 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).

[0076] 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.

[0077] 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).

[0078] 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.

[0079] 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.

[0080] 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).

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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).

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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).

[0092] 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, various and / or fruit-flavored ingredients, and the like. 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.

[0093] 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.

[0094] 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.

[0095] For example, the vaporizer (140) may be referred to as a cartomizer or an atomizer, but is not limited thereto.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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).

[0101]

[0102] Next, referring to FIG. 4, FIG. 4 illustrates an example of an aerosol generating device using an induction heating method.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107]

[0108] *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). These eddy currents generate heat within the susceptor (S) proportional to the current density and conductor resistance.

[0109] 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.

[0110] 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).

[0111] 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).

[0112] 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.

[0113] 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.

[0114] 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).

[0115] 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).

[0116] 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.

[0117]

[0118] FIG. 5 is a drawing illustrating a smoking article according to one embodiment.

[0119] 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).

[0120] 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).

[0121] 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 liquid 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] 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 polymer material, a biodegradable polymer material, or a tube filter and can have a cooling function. For example, the third portion (230) can be a tube filter and / or tube made of polylactic acid (PLA) fibers, cellulose acetate fibers, and / or lyocell fibers and including a hollow portion. The hollow portion can extend along the longitudinal direction of the third portion (230).

[0127]

[0128] The length and / or diameter of the third portion (230) may vary depending on the shape of the smoking article (200). For example, the length of the third portion (230) may be appropriately selected within the range of 7 mm to 20 mm. Preferably, the length of the third portion (230) may be approximately 12 mm, but is not limited thereto.

[0129] In some embodiments, the outer diameter of the third portion (230) may be approximately 5 mm to 10 mm, preferably 6 mm to 8 mm, more preferably 6.2 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 be any appropriate value within the range of approximately 2 mm to 5.5 mm, preferably 2.1 mm to 5 mm, more preferably 2.2 mm to 4.5 mm, and even more preferably 2.5 mm to 4 mm, but is not limited thereto. More preferably, the inner diameter of the third portion (230) may be 3.7 mm to 3.9 mm, or more preferably 3.8 mm, but is not limited thereto.

[0130]

[0131] The fourth section (240) may include a filter element. The fourth section (240) may cool the aerosol generated by the heater (130) heating the second section (220). Accordingly, the user may inhale the aerosol cooled to an appropriate temperature. In particular, the fourth section (240) may serve as a mouthpiece that contacts the user's mouth and as a filter that ultimately delivers the aerosol delivered from upstream to the user.

[0132] In one embodiment, the fourth portion (240) may be a lyocell filter composed of lyocell tow including a plurality of lyocell fibers. The length of the fourth portion (240) may be suitably adopted within the range of 4 mm to 20 mm. For example, the length of the fourth portion (240) may be about 14 mm, but is not limited thereto. Meanwhile, there is no limitation on the shape of the fourth portion (240). For example, the fourth portion (240) may be a cylindrical rod or a tubular rod including a hollow portion therein. In particular, the fourth portion (240) may be a recessed rod.

[0133] The lyocell fibers included in the fourth section (240) 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.

[0134] 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.

[0135] 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.

[0136] In some embodiments, the mono denier of the lyocell fibers included in the fourth portion (240) may range from 2.22 to 16.67 dtex (2 to 15 denier), preferably from 2.44 to 15.56 dtex (2.2 to 14 denier), more preferably from 2.78 to 14.44 dtex (2.5 to 13 denier), and even more preferably from 3.33 to 13.33 dtex (3 to 12 denier). In some embodiments, the fourth portion (240) may include lyocell tow having a total denier of 1,111 to 4,444 tex (10,000 to 40,000 denier), preferably 2,222 to 4,333 tex (20,000 to 39,000 denier), more preferably 2,778 to 4,222 tex (25,000 to 38,000 denier). In the present specification, mono denier may mean the fineness of a fiber expressed by the weight (g) of one strand of lyocell fiber per unit length of 9000 m, and total denier may mean the fineness of a fiber expressed by the weight (g) of the tow per unit length of 9000 m.

[0137] In some embodiments, the suction resistance of the fourth portion (240) may be in the range of 7 mmWG to 22 mmWG, preferably 8 mmWG to 21 mmWG, more preferably 9 mmWG to 20 mmWG, and even more preferably 9.5 mmWG to 19.5 mmWG, based on a length of 14 mm of the fourth portion (240). In some embodiments, the suction resistance of the fourth portion (240) may be in the range of 10 mmWG to 10.5 mmWG, 13.5 mmWG to 14 mmWG, or 18.0 mmWG to 18.5 mmWG, based on a length of 14 mm of the fourth portion (240), and preferably, the suction resistance of the fourth portion (240) may be in the range of 18.2 mmWG to 18.3 mmWG, based on a length of 14 mm of the fourth portion (240). By having the aspiration resistance in the above range, the amount of moisture transfer in the aerosol generated during smoking can be reduced, so that the heat sensation of the smoker's initial puff can be reduced and the nicotine removal ability in the aerosol can be improved.

[0138] Hardness is a property related to the elasticity and resilience of the fourth portion (240), and refers to the degree to which the fourth portion (240) resists pressure applied in a direction perpendicular to the longitudinal direction. In order for the smoking article to maintain its shape and be easily used by the user, it is desirable to maintain a certain level of hardness.

[0139] In some embodiments, the hardness of the fourth portion (240) may be, but is not limited to, preferably 60% to 100%, more preferably 70% to 99%, even more preferably 75% to 98%, even more preferably 80% to 97%, and even more preferably 85% to 95%. The hardness of the fourth portion (240) is a value that quantifies the degree to which the diameter of the fourth portion (240) is maintained when the fourth portion (240) is pressed with a certain level of force in a direction perpendicular to the longitudinal direction of the fourth portion (240), and may be a value that is a percentage ratio between the diameter of the fourth portion (240) before applying the force and the diameter of the fourth portion (240) after applying the force.

[0140] The circumference of the cross-section perpendicular to the longitudinal direction of the smoking article (3) of the fourth part (240) may be 14 to 25 mm, preferably 22 to 23 mm, but is not limited thereto.

[0141] In some embodiments, the fourth portion (240) may further comprise at least one binder dispersed in the lyocell tow. The fourth portion (240) may achieve a desired hardness by further comprising at least one binder dispersed in the lyocell tow.

[0142] The interior of the fourth section (240) may include at least one capsule. Here, the capsule may have a structure in which a liquid containing a fragrance is encapsulated by a film. For example, the capsule may have a spherical and / or cylindrical shape.

[0143]

[0144] 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.

[0145] 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 a leaf-shaped tobacco sheet and glycerin as a humectant, the third portion (230) may comprise cellulose acetate having a hollow interior, and the fourth portion (240) may be comprised of lyocell tow comprising lyocell fibers, although the present disclosure is not necessarily limited thereto.

[0146]

[0147] 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.

[0148]

[0149] Example 1

[0150] A smoking article having a structure as shown in FIG. 5, comprising a first part consisting of paper having a length of 10 mm and containing an aerosol generating element, a second part having a length of 12 mm and containing tobacco material, a third part having a length of 12 mm and an inner diameter of 3.8 mm and consisting of a cellulose acetate tube, and a fourth part having a length of 14 mm and consisting of lyocell tow, as shown in FIG. 5, was manufactured under the conditions shown in Example 1 of Table 1.

[0151] 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.

[0152]

[0153] Comparative Example 1

[0154] A smoking article was manufactured under the same conditions as in Example 1, Comparative Example 1 in Table 1, except that the fourth part was manufactured using cellulose acetate tow.

[0155]

[0156] ClassificationWeight(mg)Circumference(mm)Vent(%)PDO(mmH20)PDC(mmH20)Example 1616.322.65658.01121.8156.4Comparative example 1604.922.64657.17118.6151.4

[0157] Experimental Example 1. Measurement of mainstream smoke temperature by puff according to material of Part 4

[0158] In order to compare the mainstream smoke temperature per puff of the smoking articles of Example 1 and Comparative Example 1, the second part of the smoking articles according to Example 1 and Comparative Example 1 was heated at a heating temperature of 190°C to 280°C using an external heating method, and the temperature of the generated mainstream smoke was measured, and is shown in Table 2 below.

[0159] 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 mainstream smoke temperature was measured by positioning a thermocouple sensor 5 mm inside from the end of the fourth part.

[0160]

[0161] Puff degree 123456789 Example 152.3℃55.0℃51.3℃48.0℃45.8℃43.3℃41.1℃38.9℃35.9℃ Comparative example 166.3℃63.4℃59.7℃56.7℃53.4℃49.6℃44.9℃40.3℃36.6℃

[0162] Referring to Table 2 above, when comparing the mainstream smoke temperatures of the smoking articles of Example 1 and Comparative Example 1 having similar physical properties, it can be confirmed that the mainstream smoke temperature of the smoking article of Example 1 is lower than that of the smoking article of Comparative Example 1 throughout the entire puff, and that the mainstream smoke temperature of the smoking article of Example 1 is lower by at least 8°C than that of the smoking article of Comparative Example 1 in the initial puff (particularly, the 1st to 4th puffs). This confirms that the lyocell material has a superior cooling effect compared to the cellulose acetate material, particularly a superior cooling effect for the initial puff.

[0163] Example 2

[0164] 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) was manufactured.

[0165]

[0166] Examples 3 to 5

[0167] A filter (fourth part) containing the lyocell tow of Example 2 was manufactured with a length of 14 mm under the conditions shown in Examples 3 to 5 of Table 3 below. The manufactured filters (fourth part) were named Examples 3, 4, and 5, respectively, according to the magnitude of the suction resistance, and the wrapper used in the manufacture of the filters was non-oil-resistant paper having a basis weight of 75 gsm.

[0168]

[0169] Comparative Example 2

[0170] A filter (part 4) containing cellulose acetate tow and having a length of 14 mm was manufactured under the conditions shown in Table 3 below in comparison 2. The wrapper used in the manufacture of the filter was a non-grease-treated paper having a basis weight of 75 gsm.

[0171]

[0172] Classification Example 3 Example 4 Example 5 Comparative Example 2 Weight (mg) 18.10 16.17 14.22 15.30 Suction resistance (mmWG) 18.28 13.87 10.25 14.78 Hardness (%) 93.49 91.43 85.9 187.11

[0173] Next, using the filters of Examples 3 to 5 and Comparative Example 2, a smoking article having a structure as shown in FIG. 5, comprising a first part consisting 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 having a length of 12 mm and an inner diameter of 3.8 mm and consisting of a cellulose acetate tube, and a fourth part having a length of 14 mm consisting of each of Examples 3 to 5 and Comparative Example 2, was manufactured under conditions as shown in Table 4.

[0174] ClassificationWeight(mg)Circumference(mm)Vent(%)PDO(mmH20)PDC(mmH20)Smoking article of Example 3634.222.64158.49157.9194.4Smoking article of Example 4616.322.65658.01121.8156.4Smoking article of Example 5613.522.60959.25102.3141.1Smoking article of Comparative Example 2604.922.64657.17118.6151.4

[0175] Experimental Example 2. Analysis of smoke components according to the material of the fourth part and the suction resistance of the fourth part.

[0176] In order to compare the components in the smoke according to the material of the fourth part and the suction resistance of the fourth part, the second part of the smoking article according to Examples 3 to 5 and Comparative Example 2 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 5 below.

[0177] 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 3 to 5 and Comparative Example 2, 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) was a value obtained by measuring the change in the weight of the Cambridge filter before smoking and after smoking using a smoking device, and for the remaining components, the captured smoke was analyzed by GC (Gas Chromatography).

[0178]

[0179] ClassificationTPM(mg)Tar(mg)Nic(mg)PG(mg)Gly(mg)Moisture(mg)Example 338.9920.400.740.243.8217.86Example 441.2721.790.770.274.6418.70Example 542.3521.850.960.304.6819.54Comparative Example 241.2321.031.020.285.0819.18

[0180] Referring to Example 4 and Comparative Example 2, which have similar suction resistances of the fourth part and the suction resistances of the smoking articles in Table 5 above, the moisture transfer amount of the smoking article of Example 4 is 18.70 mg, and the moisture transfer amount of Comparative Example 2 is 19.18 mg, confirming that the moisture transfer amount of the smoking article of Example 4 composed of lyocell tow is less than that of the smoking article of Comparative Example 2 composed of cellulose acetate tow. That is, it can be confirmed that, in the case of similar suction resistances, the lyocell material has the advantage of reducing the user's sensation of heat when puffing compared to the cellulose acetate material. In addition, referring to Examples 3 to 5 composed of the same lyocell material, the moisture transfer amount of the smoking article of Example 3, which has a large suction resistance in the fourth part, is 17.86 g, and the moisture transfer amount of the smoking article of Example 5, which has a small suction resistance, is 19.54 mg. It can be confirmed that the greater the suction resistance, the less moisture transfer in the mainstream smoke, resulting in an excellent effect of reducing the heat sensation when the user puffs. (Smokers feel a greater heat sensation for the same temperature when there is a lot of moisture in the mainstream smoke.)

[0181] Experimental Example 3. Nicotine removal ability according to the material of the fourth part and the suction resistance of the fourth part

[0182]

[0183] Next, in order to compare the nicotine removal performance according to the suction resistance of the fourth part, the second part of the smoking article according to Examples 3 to 5 and Comparative Example 2 was heated at a heating temperature of 190°C to 280°C by an external heating method, and the amount of nicotine component included in the transferred aerosol and the amount of nicotine component remaining inside the fourth part (filter) were measured, and the measurement results were substituted into the following mathematical expression 1 to calculate the nicotine removal ability of the filter, and the results were substituted into the following mathematical expression 2 to calculate the nicotine transfer rate of the filter, which are shown in Table 6 below.

[0184] The amount of nicotine contained in the aerosol was measured by capturing the smoke generated from the smoking article of Experimental Example 2 on a Cambridge filter (i.e., Cambridge Filter Pad (CFP)) and analyzing it with GC (Gas Chromatography), and the amount of nicotine remaining inside the fourth part (filter) was measured by extracting the fourth part (filter) by immersing it in water after smoking and analyzing it with GC / MS equipment. At this time, the fourth part (filter) was immersed overnight in a container containing distilled water, and the solution containing the extracted component was used for GC / MS analysis.

[0185]

[0186] [Mathematical Formula 1]

[0187] Removal capacity (%) = (residual amount in the 4th part (filter) after smoking) / (residual amount in the 4th part (filter) after smoking + aerosol transfer amount after smoking) × 100

[0188]

[0189] [Equation 2]

[0190] Transmission rate (%) = 100 (%) - Removal ability (%)

[0191]

[0192] Classification Aerosol migration amount (mg) Residual amount in filter (mg) Migration rate (%) Removal ability (%) Example 30.740.9244.555.5 Example 40.770.7550.749.3 Example 50.960.6958.341.7 Comparative example 21.020.3872.927.1

[0193] Referring to Table 6 above, it can be confirmed that the filters of Examples 3 to 5, in which the fourth part is composed of lyocell tow, all have superior nicotine removal ability compared to the filter of Comparative Example 2, in which the fourth part is composed of cellulose acetate tow. In addition, when the fourth part is composed of lyocell tow, the nicotine removal ability of the filter of Example 3, which has a large suction resistance due to the difference in suction resistance, is 55.5%, and the nicotine removal ability of the filter of Example 5, which has a small suction resistance, is 41.7%, confirming that the greater the suction resistance, the better the nicotine removal ability.

[0194]

[0195] *

[0196] 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. Regarding smoking items, 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 Including a fourth part including a filter element, The first part, the second part, the third part, and the fourth part are arranged in sequence along the length direction of the smoking article, The fourth portion comprises a lyocell tow comprising a plurality of lyocell fibers. Smoking items.

2. In paragraph 1, The mono denier of the lyocell fibers included in the above lyocell tow is 2 to 15, and the total denier of the above lyocell tow is 10,000 to 40,000. Smoking items.

3. In paragraph 1, The suction resistance of the fourth part is 7 mmWG to 22 mmWG based on the length of the fourth part of 14 mm. Smoking items.

4. In paragraph 3, The suction resistance of the fourth part is 9.5 mmWG to 19.5 mmWG based on the length of the fourth part of 14 mm. Smoking items.

5. In paragraph 1, The hardness of the fourth part above is 60% to 100%, Smoking items.

6. In paragraph 5, The hardness of the fourth part is 85% to 95%, Smoking items.

7. In paragraph 1, The third part is characterized by being a tubular structure including a hollow portion. Smoking items.

8. In paragraph 7, The third part comprises at least one of a tube filter or a pipe comprising polylactic acid (PLA) fibers, cellulose acetate fibers, or lyocell fibers and including a hollow portion. Smoking items.

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