Classifications

• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
  • A24D3/06—Use of materials for tobacco smoke filters
  • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
  • A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/10—Chemical features of tobacco products or tobacco substitutes
  • A24B15/16—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D1/00—Cigars; Cigarettes
  • A24D1/20—Cigarettes specially adapted for simulated smoking devices
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
  • A24D3/06—Use of materials for tobacco smoke filters
  • A24D3/062—Use of materials for tobacco smoke filters characterised by structural features
  • A24D3/063—Use of materials for tobacco smoke filters characterised by structural features of the fibers
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
  • A24D3/06—Use of materials for tobacco smoke filters
  • A24D3/14—Use of materials for tobacco smoke filters of organic materials as additive
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
  • A24D3/04—Tobacco smoke filters characterised by their shape or structure

Definitions

• the present invention relates to a smoking article capable of providing a more improved smoking experience to a user by preventing a cooling element from melting due to high temperature caused by heat applied for heating the smoking article by applying lyocell tow in the cooling element of the smoking article.
• Still another object of the present invention is to provide a smoking article, which includes a cooling element composed of a binder and lyocell tow including a plurality of lyocell fibers so that the smoking article is capable of stably maintaining its shape by imparting appropriate hardness to the lyocell tow through the binder even though the cooling element is a tubular structure composed of lyocell tow.
• a smoking article which includes 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 filtering element, wherein the first portion, the second portion, the third portion, and the fourth portion are sequentially arranged along the longitudinal direction of the smoking article, and the third portion includes lyocell tow including a plurality of lyocell fibers.
• the third portion may further include at least one binder dispersed in a plurality of the lyocell tow.
• an inner diameter of the third portion may be 10 to 90% of an outer diameter of the third portion.
• the inner diameter of the third portion may be 2 mm to 6 mm, and the inner diameter of the third portion is smaller than the outer diameter.
• 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.
• the inner diameter of the third portion is smaller than the outer diameter.
• 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.
• a system including the above-described smoking article and an aerosol-generating device using the same.
• a smoking article which includes 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 filtering element, since the third portion is composed of lyocell tow including a plurality of lyocell fibers, the smoking article can prevent or minimize the deformation resulting from the heat transferred from a heater for heating the smoking article or an aerosol generated in the smoking article due to the excellent heat resistance of the lyocell tow.
• the smoking article which includes 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 filtering element, since the cooling element is composed of lyocell tow including a plurality of lyocell fibers, the smoking article can reduce the heat felt by a user and maximize a cooling effect by effectively reducing the amount of moisture delivered during smoking due to the excellent moisture affinity of the lyocell tow compared to cellulose acetate tow.
• the smoking article according to an embodiment includes a cooling element composed of lyocell tow including a plurality of lyocell fibers and at least one binder, appropriate hardness can be imparted to the lyocell tow through at least one binder. Accordingly, the shape of the cooling element can be stably maintained even though the cooling element (third portion) is a tubular structure composed of lyocell tow, and due to the stable shape maintenance, the quality of a smoking experience can be prevented from being degraded due to deformation of the cooling element (third portion) when the smoking article is stored and/or smoked.
• first, second, A, B, (a), and (b) may be used. Such terms are only used for distinguishing one component from another component, and the essence, order, sequence, or the like of the corresponding component is not limited by the terms.
• a certain component is described as being “connected,” “coupled,” or “linked” to another component, it should be understood that, although the component may be directly connected or linked to the other component, still another component may also be “connected,” “coupled,” or “linked” between the two components.
• a "smoking article” may refer to any product that can be smoked or any product that can provide a smoking experience, regardless of whether the product is based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco, or tobacco substitutes.
• the smoking article may include products that can be smoked, such as cigarettes, cigars, and cigarillos.
• a "smoking material” may refer to any type of material that can be used in a smoking article.
• upstream or “upstream direction” may refer to a direction moving away from an oral region of a smoker
• downstream or “downstream direction” may refer to a direction approaching the oral region of the smoker.
• a "lyocell filter” refers to a filter including or composed of lyocell tow.
• lyocell tow includes or is composed of a plurality of lyocell fibers.
• the lyocell tow may refer to a bundle formed by cross-connecting adjacent lyocell fibers.
• lyocell fibers may refer to fibers made of lyocell cellulose.
• lyocell fibers may be fibers made of cellulose derived or primarily derived from wood pulp, especially, semi-synthetic fibers.
• a "shaped cross-section” is defined as a cross-section having a shape including a plurality of protrusions instead of having a circular shape.
• 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 shaped cross-section.
• the "protrusion” may refer to a distinct, extended segment or arm extending outward from the central core or joining point of the cross-section of a lyocell fiber.
• the lyocell fibers may include three or more protrusions branching and/or extending from the center and/or the center of the cross-section.
• the lyocell fibers included in the lyocell tow may have a Y-shaped cross-section for application in cigarette filters.
• a “hollow” may refer to a channel extending along the longitudinal direction.
• a "recess-type rod" as a filter rod may refer to a filter rod with one or more pores.
• the hardness of a third portion is a value obtained by quantifying the degree to which a diameter of the third portion is maintained when the third portion is pressed with a certain level of force in a direction perpendicular to the longitudinal direction of the third portion, and may be a percentage value of a ratio of a diameter of the third portion after the force is applied to a diameter of the third portion before the force is applied.
• the hardness (%) of the third portion may be calculated by (D-a)/D ⁇ 100%.
• D represents a diameter of the third portion
• a represents a distance the third portion moves downward due to a 300 g weight (i.e., the third portion is pressed).
• organic acid is a general term for organic compounds that are acidic.
• component percent (%) and component proportion refer to the weight percent (wt%) and weight proportion of a component, respectively.
• Health Canada (HC) conditions may include a puff volume of 55 ml, a puff frequency of 30 seconds, and a puff duration of 2 seconds.
• the HC conditions may be based on a state in which the perforations of a filter are blocked. In measurement under the HC conditions, the puff count may be 9.
• tobacco element refers to an element including a tobacco material.
• tobacco material refers to any form of material including components derived from tobacco leaves.
• cooling element refers to an element that cools any material.
• the cooling element may cool an aerosol generated from an aerosol-generating element or a tobacco element.
• a "filtering element” refers to an element including a filtering material.
• the filtering element may include a plurality of fiber strands.
• FIGS. 1 to 4 are diagrams showing examples in which an aerosol-generating article is inserted into an aerosol-generating device.
• an aerosol-generating device 100 includes a battery 110, a control unit 120, and a heater 130.
• the aerosol-generating device 100 may further include a vaporizer 140.
• a smoking article 200 may be inserted into the internal space of the aerosol-generating device 100.
• the aerosol-generating device 100 includes the heater 130, if necessary, the heater 130 may be omitted. In some embodiments, the aerosol-generating device 100 may not include a heater. In some embodiments, the battery 110, the control unit 120, and the vaporizer 140 are sequentially disposed, that is, disposed in a row along the longitudinal direction of the smoking article 200.
• FIG. 1 it is illustrated that the battery 110, the control unit 120, and the heater 130 are disposed in a row. In some embodiments, the battery 110, the control unit 120, and the heater 130 are sequentially disposed along the longitudinal direction of the smoking article 200. Also, it is illustrated in FIG. 2 that the battery 110, the control unit 120, the vaporizer 140, and the heater 130 are disposed in a row along the longitudinal direction of the smoking article 200. Also, it is illustrated in FIG. 3 that the vaporizer 140 and the heater 130 are disposed in parallel.
• the internal structure of the aerosol-generating device 100 is not limited to those shown in FIGS. 1 to 3 . In other words, the disposition of the battery 110, the control unit 120, the heater 130, and the vaporizer 140 may vary depending on the design of the aerosol-generating device 100.
• the aerosol-generating device 100 may operate the heater 130 and/or the 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 is delivered to a user by passing through the smoking article 200.
• the aerosol-generating device 100 may operate the heater 130.
• the battery 110 supplies power used to operate the aerosol-generating device 100.
• the battery 110 may supply power so that the heater 130 and/or the vaporizer 140 can operate, and may supply power required to operate the control unit 120.
• the battery 110 may supply power required to operate a display, a sensor, a motor, and the like installed in the aerosol-generating device 100.
• the control unit 120 controls the overall operation of the aerosol-generating device 100.
• the control unit 120 controls the operation of not only the battery 110, the heater 130, and the vaporizer 140 but also other components included in the aerosol-generating device 100.
• the control unit 120 may also determine whether the operation of the aerosol-generating device 100 is possible by checking the state of each component of the aerosol-generating device 100.
• the control unit 120 includes at least one processor.
• the processor may be implemented as an array of multiple logic gates and implemented as a combination of a general-purpose microprocessor and a memory storing a program that can be executed on the microprocessor. Also, it will be understood by those skilled in the art to which the present embodiment pertains that the processor may be implemented as other types of hardware.
• the heater 130 may be heated by the power supplied from the battery 110.
• the heater 130 may be located outside the smoking article 200. Therefore, the heated heater 130 may increase the temperature of an aerosol-generating material in the smoking article 200.
• the heater 130 may be an electrically resistant heater.
• the heater 130 includes an electrically conductive track, and as current flows through the electrically conductive track, the heater 130 may be heated.
• the heater 130 is not limited to the above-described example, and any heater may be used without limitation as long as it can be heated to a desired temperature.
• the desired temperature may be preset in the aerosol-generating device 100 or may be set by a user.
• the heater 130 may be an induction heating-type heater.
• the heater 130 may include an electrically conductive coil for heating an aerosol-generating article by an induction heating method, and the aerosol-generating article may include a susceptor that can be heated by the induction heating-type heater.
• 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 the inside and/or outside of the smoking article 200 may be heated according to the shape of a heating element.
• a plurality of heaters 130 may be disposed in the aerosol-generating device 100.
• a plurality of heaters 130 may be disposed so as to be inserted into the inside of the smoking article 200 or may be disposed outside the smoking article 200.
• some of the plurality of heaters 130 may be disposed so as to be inserted into the inside of the smoking article 200, and the remainder may be disposed outside the smoking article 200.
• the heater 130 may heat the inside and outside of the smoking article 200.
• the shape of the heater 130 is not limited to the shapes shown in FIGS. 1 to 3 , and the heater may be manufactured in various shapes.
• the heater 130 may include an electrically resistant heater and an induction heating-type heater.
• the vaporizer 140 may heat a liquid composition to generate an aerosol, and the generated aerosol may be delivered to a user by passing through the smoking article 200.
• the aerosol generated by the vaporizer 140 may move along the airflow path of the aerosol-generating device 100, and the airflow path may be configured so that the aerosol generated by the vaporizer 140 can be delivered to a user by passing through the smoking article 200.
• the vaporizer 140 may include a liquid reservoir, a liquid delivery means, and a heating element, but the present invention is not limited thereto.
• the liquid reservoir, the liquid delivery means, and the heating element may be included as independent modules in the aerosol-generating device 100.
• the liquid reservoir may store a liquid composition.
• the liquid composition may be a liquid including a tobacco-containing material including a volatile tobacco flavor component.
• the liquid composition may be a liquid including a non-tobacco material.
• the liquid reservoir may be manufactured to be detachable from/attachable to the vaporizer 140 or manufactured integrally with the vaporizer 140.
• the liquid composition may include water, a solvent, ethanol, a plant extract, a flavoring, a flavoring agent, and/or a vitamin mixture.
• the flavoring may include menthol, peppermint, spearmint oil, and/or various types of fruit flavoring components, but the present invention is not limited thereto.
• the flavoring agent may include a component that can provide various types of flavors to a user.
• the vitamin mixture may be a mixture of at least one of vitamin A, vitamin B, vitamin C, and vitamin E, but the present invention is not limited thereto.
• the liquid composition may include an aerosol-forming agent such as glycerin and propylene glycol.
• the liquid delivery means may deliver the liquid composition in the liquid reservoir to the heating element.
• the liquid delivery means may be a wick such as cotton fiber, ceramic fiber, glass fiber, and/or a porous ceramic, but the present invention is not limited thereto.
• the heating element is an element for heating the liquid composition delivered by the liquid delivery means.
• the heating element may include a metal heating wire, a metal heating plate, and/or a ceramic heater, but the present invention is not limited thereto.
• the heating element may be composed of a conductive filament such as a nichrome wire, and may be disposed in a structure that is wound around the liquid delivery means.
• the heating element may be heated by current supply and may heat the liquid composition by transferring heat to the liquid composition in contact with the heating element. As a result, an aerosol may be generated.
• the vaporizer 140 may be referred to as a cartomizer or an atomizer, but the present invention is not limited thereto.
• 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.
• the aerosol-generating device 100 may include a display capable of outputting visual information and/or a motor for outputting tactile information.
• the aerosol-generating device 100 may include at least one sensor (a puff sensor, a temperature sensor, and/or an aerosol-generating article insertion sensor).
• the aerosol-generating device 100 may be manufactured so that external air can be introduced or internal gas can be discharged even when the smoking article 200 is inserted.
• the entire first portion may be inserted into the inside of the aerosol-generating device 100, and the second portion may be exposed to the outside. Alternatively, only a portion of the first portion may be inserted into the inside of the aerosol-generating device 100, or the entire first portion and a portion of the second portion may be inserted.
• a user may inhale an aerosol while holding the second portion in his/her mouth. In this case, an aerosol is generated by passing external air through the first portion, and the generated aerosol is delivered to the user's mouth by passing through the second portion.
• external air may be introduced through at least one air path formed in the aerosol-generating device 100.
• the opening and closing and/or size of the air path formed in the aerosol-generating device 100 may be adjusted by a user. Accordingly, a vapor amount, a feeling of smoking, and the like may be adjusted by a user.
• external air may be introduced into the inside of the smoking article 200 through at least one hole formed in the surface of the smoking article 200.
• FIG. 4 shows an example of an aerosol-generating device using an induction heating method.
• the aerosol-generating device 100 may supply power to the coil C so that the coil C generates a magnetic field. As the magnetic field generated by the coil C passes through the susceptor S, the susceptor S may be heated.
• This induction heating phenomenon is a well-known phenomenon explained by Faraday's law of induction. Particularly, when the magnetic induction in the susceptor S changes, an electric field is generated in the susceptor S, and thus eddy currents flow within the susceptor S. Eddy currents generate heat proportional to the current density and conductor resistance within the susceptor S.
• an aerosol may be generated.
• the aerosol generated from the aerosol-generating material is delivered to a user by passing through the smoking article 200.
• the battery 110 may supply power so that the coil C can generate a magnetic field.
• the control unit 120 may be electrically connected to the coil C.
• the coil C may be an electrically conductive coil that generates a magnetic field by power supplied from the battery 110.
• the coil C may be disposed to surround at least a portion of the void V.
• the magnetic field generated by the coil C may be applied to the susceptor S disposed at the inner end of the void V.
• the susceptor S may be heated as the magnetic field generated from the coil C passes therethrough, and may include a metal and/or carbon.
• the susceptor S may include at least one of ferrite, ferromagnetic alloys, stainless steel, and aluminum.
• the susceptor S may include at least one of graphite, molybdenum, silicon carbide, niobium, nickel alloys, metal films, ceramics such as zirconia, transition metals such as nickel (Ni) and cobalt (Co), and metalloids such as boron (B) or phosphorus (P).
• the susceptor S is not limited to the above-described examples, and any susceptor may be used without limitation as long as it can be heated to a desired temperature by applying a magnetic field.
• the desired temperature may be preset in the aerosol-generating device 100 or may be set by a user.
• the susceptor S When the smoking article 200 is accommodated in the void V of the aerosol-generating device 100, the susceptor S may be disposed to surround at least a portion of the smoking article 200. Therefore, the heated susceptor S may increase the temperature of an aerosol-generating material in the smoking article 200.
• the susceptor S is disposed to surround at least a portion of the aerosol-generating article, but the present invention is not limited thereto.
• 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 the inside and/or outside of the smoking article 200 may be heated according to the shape of a heating element.
• a plurality of susceptors S may be disposed in the aerosol-generating device 100.
• a plurality of susceptors S may be disposed outside the smoking article 200 and may be disposed so as to be inserted into the inside.
• some of the plurality of susceptors S may be disposed so as to be inserted into the inside of the smoking article 200, and the remainder may be disposed outside the smoking article 200.
• the shape of the susceptor S is not limited to the shape shown in FIG. 4 , and the susceptor may be manufactured in various shapes.
• FIG. 5 is a diagram showing a smoking article according to an embodiment.
• a smoking article 200 may include a first portion 210, a second portion 220, a third portion 230, and a fourth portion 240.
• the first portion 210, the second portion 220, the third portion 230, and the fourth portion 240 may include an aerosol-generating element, a tobacco element, a cooling element, and a filtering element, respectively.
• 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 the airflow passing through the first portion 210 and the second portion 220
• the fourth portion 240 may include a filtering material.
• the third portion 230 and the fourth portion 240 may be referred to as a cooling structure 230
• the fourth portion 240 may be referred to as a mouthpiece 240.
• the third portion 230 may be manufactured using lyocell fibers.
• 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 with a hollow formed therein. The hollow may extend along the longitudinal direction of the third portion 230.
• the hollow of the third portion 230 may be located in the center of a cross-section perpendicular to the longitudinal direction of the third portion 230, and may be disposed so that it extends in the longitudinal direction.
• the hollow of the third portion 230 may be coaxial with the third portion 230.
• a length and/or diameter of the third portion 230 may vary depending on the shape of the smoking article 200.
• a length of the third portion 230 may be appropriately adjusted in a range of 7 mm to 20 mm.
• the third portion 230 may have a length of about 12 mm, but the present invention is not limited thereto.
• the lyocell fibers included in the third portion 230 may be eco-friendly fibers made of cellulose extracted from wood pulp.
• the lyocell tow may refer to a bundle formed by cross-connecting adjacent lyocell fibers.
• the third portion 230 may have an outer diameter of about 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 third portion 230 may have an inner diameter (i.e., the diameter of the hollow) smaller than the outer diameter, that is, an appropriate inner diameter in a range of about 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 the present invention is not limited thereto.
• the third portion 230 may have an inner diameter of 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, and more preferably 2.8 mm or 3.8 mm, but the present invention is not limited thereto.
• the inner diameter of the third portion 230 may be 10% to 90%, preferably 20% to 80%, more preferably 25% to 75%, and even more preferably 30% to 70% or 35% to 75% of the outer diameter of the third portion 230, but the present invention is not limited thereto.
• 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 protrusions, or an O-shaped cross-section, but the present invention is not limited thereto.
• 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, Arabic gum, carrageenan, konjac, and agar, but the present invention is not limited thereto as long as it is a material capable of imparting appropriate hardness by binding between a plurality of lyocell fibers.
• the cellulose-based binder may include hydroxypropyl methyl cellulose (HPMC), ethyl cellulose (EC), methyl cellulose (MC), or carboxymethyl cellulose (CMC),
• the vinyl-based binder may include polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), or ethylene vinyl acetate (EVAc)
• the polyester-based binder may include a polyester including one or more selected from the group consisting of C5 to C12 alkylenes, arylenes, and heteroarylenes
• the dextrin-based binder may include dextrin
• the starch-based binder may include starch (e.g., tapioca, corn, wheat, potato, and/or sweet potato), cationic starch, and/or esterified starch, but the present invention is not limited thereto.
• the binder may be added so as to be dispersed in lyocell tow during the manufacturing process of the third portion 230.
• the binder may be added to the inside of lyocell tow by wrapping a heater rod with lyocell tow and spraying the binder onto the outer surface of the cylindrical lyocell tow formed to wrap around the heater rod from the inside, and alternatively or additionally, the binder may be added to the inside of lyocell tow by adding the binder through the inner surface of the lyocell tow formed to wrap around the heater rod from the inside, from the heater rod, but the method of manufacturing the third portion 230 is not limited thereto.
• the third portion 230 including the lyocell tow in which the binder is dispersed may have a hardness of 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%, but the present invention is not limited thereto.
• the hardness of the third portion 230 is a value obtained by quantifying the degree to which a 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 percentage value of a ratio of a diameter of the third portion 230 after the force is applied to a diameter of the third portion 230 before the force is applied.
• the third portion 230 When the third portion 230 has a hardness within the above range, the third portion 230 can exhibit an effect of stably maintaining its shape despite having a tubular structure composed of lyocell tow, and the stable shape maintenance of the third portion 230 can prevent the quality of a smoking experience from being degraded due to deformation of the third portion 230 when the smoking article 200 is stored and/or smoked.
• the smoking article 200 according to the present invention includes the third portion 230 composed of lyocell tow and having a tubular shape with a hollow formed therein, the amount of moisture delivered during smoking is effectively reduced due to the superior moisture affinity of the lyocell tow compared to cellulose acetate tow, and accordingly, the heat felt by a user can be reduced and a cooling effect can be maximized. Also, since an off-flavor caused by heat is not generated compared with a paper tube, the quality of smoking can be improved.
• the smoking article 200 may include a wrapper 250 that surrounds at least a portion of the first portion 210 to the fourth portion 240. Particularly, the smoking article 200 may include a wrapper 250 that surrounds all of the first portion 210 to the fourth portion 240.
• the wrapper 250 may be located on the outermost surface of the smoking article 200, and the wrapper 250 may be a single wrapper or a combination of a plurality of wrappers.
• a heating-type cigarette (a smoking article of Example 1) having a first portion composed of paper, having a length of 10 mm and including an aerosol-generating element, a second portion having a length of 12 mm and including a tobacco material, a third portion having a length of 12 mm, and a fourth portion having a length of 14 mm and composed of cellulose acetate was manufactured, and the draw resistance was measured and shown in Table 1 below.
• PDC may refer to a draw resistance value measured in a state in which the second portion is open, the perforations formed in any one of the first, third, and fourth portions are blocked, and the inflow of external air is blocked
• PDO may refer to a draw resistance value measured in a state in which the second portion is open, the perforations formed in any one of the first, third, and fourth portions are not blocked, and the inflow of external air is allowed.
• a heating-type cigarette (a smoking article of Comparative Example 1) was manufactured in the same manner as in Example 1, except that a third portion was manufactured using a cellulose acetate material, and the draw resistance was measured and shown in Table 1 below.
• the smoking articles including lyocell tow and cellulose acetate, respectively, as a material constituting the third portion had similar physical properties, and similar levels of the ventilation rate (VR) and draw resistance, which may be associated with heat resistance and cooling during smoking, were exhibited.
• VR ventilation rate
• draw resistance which may be associated with heat resistance and cooling during smoking
• the second portion (tobacco element) of the smoking articles according to Comparative Example 1 and Example 1 was heated to a heating temperature of 190 °C to 280 °C by an external heating method, and the amount of moisture in the generated smoke (a moisture transfer amount) was measured and shown in Table 2 below.
• the smoking article of Example 1 having the third portion composed of a lyocell material has a superior effect of reducing the heat felt by a smoker during smoking compared to the smoking article of Comparative Example 1 having the third portion composed of a cellulose acetate material.
• FIG. 6A shows an image obtained by photographing the third portions of Comparative Example 1 and Example 1 before the experiment (before smoking), the left side in FIG. 6A is the third portion of Comparative Example 1, and the right side in FIG. 6A is the third portion of Example 1.
• FIG. 6B shows an image obtained by photographing the third portions of Comparative Example 1 and Example 1 after the experiment (after smoking), the left side in FIG. 6B is the third portion of Comparative Example 1, and the right side in FIG. 6B is the third portion of Example 1.

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