Classifications

• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for 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
  • A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
• • 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
  • A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
  • A24B15/14—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco made of tobacco and a binding agent not derived from tobacco
• • 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
  • 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
  • A24B15/18—Treatment of tobacco products or tobacco substitutes
  • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
  • A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR 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 FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for 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

Definitions

• the present invention relates to a smoking article which includes lyocell tow in a tobacco rod including a tobacco material (for example, a tobacco material which may be included in a medium substrate) to improve the settling rate of the tobacco material (for example, a tobacco material which may be included in a medium substrate) and prevent the medium portion from being deformed by heat applied to heat the smoking article, thereby providing a user (a consumer) with a more improved smoking experience.
• a tobacco material for example, a tobacco material which may be included in a medium substrate
• an activated carbon CA filter i.e., an activated carbon cellulose acetate filter
• a CA filter i.e., a cellulose acetate filter
• the activated carbon CA filter is suitable for effectively fixing the components structurally, but the cellulose acetate tow constituting the filter has a disadvantage of melting at high temperatures, which makes it difficult to use in a high-temperature environment.
• One object of the present invention is to provide a smoking article which includes lyocell tow in a tobacco rod including a tobacco material (for example, a tobacco material which may be included in a medium substrate) to improve the settling rate of the tobacco material and prevent a tobacco rod from being deformed by heat applied to heat the smoking article, thereby providing a user with a more improved smoking experience.
• a tobacco material for example, a tobacco material which may be included in a medium substrate
• a smoking article including: a tobacco rod, a front-end plug arranged on one side of the tobacco rod and having at least one channel formed therein, a first segment arranged on the other side opposite to the one side of the tobacco rod, and a second segment arranged on the other side of the first segment, wherein the tobacco rod includes lyocell tow including a plurality of lyocell fibers, and a medium substrate.
• the front-end plug, the tobacco rod, the first segment, and the second segment may be sequentially arranged along the longitudinal direction of the smoking article.
• the medium substrate may be filled in a dispersed form in the lyocell tow.
• the lyocell tow may include the medium substrate in a dispersed form.
• the medium substrate may include a tobacco material, and may be is in the form of at least one of tobacco particles, tobacco sheets, tobacco beads, tobacco granules, and tobacco powder.
• the medium substrate may include a plurality of tobacco granules in the form of granules including the tobacco material.
• the first segment may have a tube shape having a hollow formed therein
• the second segment may include at least one of cellulose acetate (hereinafter, may be abbreviated as "CA”) and lyocell.
• CA cellulose acetate
• a smoking article includes lyocell tow in a tobacco rod including a tobacco material (for example, a tobacco material which may be included in a medium substrate), the settling rate of the tobacco material can be improved and the tobacco rod can be prevented from being deformed by heat applied to heat the smoking article, thereby providing a user with a more improved smoking experience.
• a tobacco material for example, a tobacco material which may be included in a medium substrate
• a “longitudinal direction” may refer to a direction corresponding to the longitudinal axis of a smoking article.
• the “longitudinal axis” of the smoking article may refer to an imaginary line that extends along the main longitudinal direction of the smoking article. This axis typically runs 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).
• lyocell fiber may refer to a fiber made of lyocell cellulose.
• the lyocell fiber may be a fiber made of cellulose derived from or mainly derived from wood pulp, particularly a semi-synthetic fiber.
• a "reconstituted tobacco leaf” refers to a tobacco leaf reconstituted from tobacco materials.
• a "non-circular 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 that cross-section may be referred to as a "non-circular cross-section.”
• the "protrusion” may refer to a distinct and extended segment or arm extending outward from the central core or joining point of the cross-section of the lyocell fiber.
• the lyocell fibers may have a Y-shaped cross-section with three protrusions branching and/or extending from the center and/or the center of the cross-section, a cross-shaped cross-section with four protrusions, a star-shaped cross-section with five protrusions, or may also have an O-shaped cross-section, but the present invention is not limited thereto.
• a "recess filter” may refer to a filter including one or more pores.
• the cross-sectional shape of a channel formed in a front-end plug which is "trilobal,” “quadlobal,” or “multilobal,” may refer to a cross-section having a shape in which three, four or more protrusions branch and/or extend from the center of the cross-section of the channel, respectively.
• the "protrusion” may refer to a distinct and extended segment or arm extending outward from the central core or joining point of the cross-section of the channel.
• hard wrapping paper refers to a wrapping paper having a basis weight greater than or equal to a certain value.
• greye-resistant wrapping paper may refer to wrapping paper that is surface-treated to be grease-resistant
• greye-resistant hard wrapping paper may refer to hard wrapping paper that is surface-treated to be grease-resistant
• general wrapping paper may refer to wrapping paper that is not surface-treated to be grease-resistant
• general hard wrapping paper may refer to hard wrapping paper that is not surface-treated to be grease-resistant
• the "single fiber fineness" of lyocell tow or cellulose acetate tow refers to a fiber fineness 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.
• puff refers to an action of drawing or inhaling the air through a smoking article to produce and inhale smoke or vapor.
• puff count may refer to the total number of drawing and inhalation actions during use of the smoking article. Alternatively or additionally, the puff count may represent the maximum number of drawing and inhalation actions that the smoking article can provide before it is completely consumed or ceases to function.
• 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 volume flow rate (e.g., mL/s) of air entering the smoking article without burning or heating through the front region, that is, the longitudinal upstream end, of the smoking article to the total volume flow rate (e.g., mL/s) of air at the outlet, that is, the longitudinal downstream end, of the smoking article.
• the ventilation rate may be measured according to ISO 9512:2019.
• the contents of the components in the total particulate matter (TPM) of the collected smoke may be analyzed by gas chromatography-mass spectrometry (GC/MS).
• GC/MS gas chromatography-mass spectrometry
• a Cambridge filter Cambridge filter pad (CFP)
• IPA isopropyl alcohol
• PTFE polytetrafluoroethylene
• the immersion time may be 20 minutes or more, particularly for tar or nicotine.
• FIGS. 1 to 3 are diagrams showing examples of smoking articles inserted into an aerosol generation device.
• the aerosol generation device 1 shown in FIGS. 1 to 3 . Accordingly, a person skilled in the art related to the present embodiment will understand that the aerosol generation device 1 may further include other general-purpose components in addition to the components shown in FIGS. 1 to 3 .
• FIGS. 2 and 3 show that the aerosol generation device 1 includes a heater 13, the heater 13 may be omitted when necessary. In some embodiments, the aerosol generation device 1 does not include a heater. In some embodiments, the battery 11, the controller 12, and the vaporizer 14 are arranged sequentially, that is, arranged in a row, along the longitudinal direction of the smoking article 3.
• FIG. 1 shows that the battery 11, the controller 12, and the heater 13 are arranged in a row. In some embodiments, the battery 11, the controller 12, and the heater 13 are arranged sequentially along the longitudinal direction of the smoking article 3. Also, FIG. 2 shows that the battery 11, the controller 12, the vaporizer 14, and the heater 13 are arranged in a row along the longitudinal direction of the smoking article 3. In some embodiments, the battery 11, the controller 12, the vaporizer 14, and the heater 13 are arranged sequentially, that is, arranged in a row, along the longitudinal direction of the smoking article 3. In addition, FIG. 3 shows that the vaporizer 14 and the heater 13 are arranged in parallel. However, the internal structure of the aerosol generation device 1 is not limited to those shown in FIGS. 1 to 3 .
• the arrangement of the battery 11, the controller 12, the heater 13, and the vaporizer 14 may vary depending on the design of the aerosol generation device 1.
• the battery 11, the controller 12, and the heater 13 are arranged sequentially along the longitudinal direction of the smoking article 3.
• the battery 11 supplies the power used to operate the aerosol generation device 1.
• the battery 11 may supply power to heat the heater 13 or the vaporizer 14 and may supply the power required for the controller 12 to operate.
• the battery 11 may supply the power required for the displays, sensors, motors, and the like installed in the aerosol generation device 1 to operate.
• the heater 13 may be heated by power supplied from the battery 11. For example, when the smoking article 3 is inserted into the aerosol generation device 1, the heater 13 may be located outside the smoking article 3. Accordingly, the heated heater 13 may increase the temperature of an aerosol-generating material in the smoking article 3.
• the heater 13 may be an induction heating heater.
• the heater 13 may include an electrically conductive coil configured to heat the smoking article 3 in an induction heating manner, and the smoking article 3 may include a susceptor that may be heated by the induction heating heater.
• the heater 13 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 3 depending on the shape of the heating element.
• the vaporizer 14 may generate an aerosol by heating the liquid composition, and the generated aerosol may be delivered to the user through the smoking article 3.
• the aerosol generated by the vaporizer 14 may move along an airflow passage of the aerosol generation device 1, and the airflow passage may be configured such that the aerosol generated by the vaporizer 14 may be delivered to the user through the smoking article 3.
• the vaporizer 14 may generate an aerosol by heating the liquid composition, and may discharge the aerosol toward the smoking article such that the aerosol passes through the smoking article inserted into a smoking article insertion portion.
• the vaporizer 14 may include, but is not limited to, a liquid storage portion, a liquid delivery means, and a heating element.
• the liquid storage portion, the liquid delivery means, and the heating element may also be included as separate modules in the aerosol generation device 1.
• the liquid storage portion may store a liquid composition.
• the liquid composition may be a liquid containing a tobacco-containing material including a volatile tobacco flavor component, or may be a liquid containing a non-tobacco material.
• the liquid storage portion may be manufactured to be detachable from/attachable to the vaporizer 14, or may be manufactured integrally with the vaporizer 14.
• the smoking article 3 may be similar to a typical combustion-type smoking article.
• the smoking article 3 may be divided into a tobacco rod 31 including a tobacco material and an aerosol-generating material and a filter rod 32 including a filter or the like.
• the filter rod 32 of the smoking article 3 may also include an aerosol-generating material.
• an aerosol-generating material manufactured in the form of a granule or capsule may be inserted into the tobacco rod 31 and optionally into some region of the filter rod 32.
• the entire tobacco rod 31 may be inserted into the interior of the aerosol generation device 1, and the filter rod 32 may be exposed to the outside.
• only a portion of the tobacco rod 31 may be inserted into the interior of the aerosol generation device 1, or the entire tobacco rod 31 and a portion of the filter rod 32 may be inserted into the interior of the aerosol generation device 1.
• the user may inhale an aerosol while holding the filter rod 32 in his or her mouth. At this time, the aerosol is generated as the outside air passes through the tobacco rod 31, and the generated aerosol is delivered to the user's mouth through the filter rod 32.
• the filter rod 32 may be adjacent to one side of the tobacco rod 31 or to the rear end of the tobacco rod 31.
• the filter rod 32 may include a first segment 321 configured to cool the aerosol and a second segment 322 configured to filter certain components contained in the aerosol.
• the first segment 321 is arranged between the tobacco rod 31 and the second segment 322.
• the front-end plug 33 may be located on one side of the tobacco rod 31 facing the filter rod 32 or located on the other side opposite to the one side of the tobacco rod 31.
• the front-end plug 33 may be adjacent to the front end of the tobacco rod 31.
• the front-end plug 33 may prevent the tobacco rod 31 from separating to the outside, and may prevent a liquefied aerosol from being introduced from the tobacco rod 31 into the aerosol generation device (the reference numeral '1' in FIGS. 1 to 3 ) during smoking.
• the diameter of the smoking article 3 may be in the range of 5 mm to 9 mm, but the present invention is not limited thereto.
• the front-end plug 33 may have a length of approximately 4 mm to 20 mm (for example, 7 mm)
• the tobacco rod 31 may have a length of approximately 13 mm to 17 mm(for example, 15 mm)
• the first segment 321 may have a length of approximately 7 mm to 20 mm (for example, 12 mm)
• the second segment 322 may have a length of approximately 4 mm to 20 mm (for example, 14 mm), but the present invention is not limited thereto.
• the lyocell fibers may have a non-circular cross-section.
• the non-circular cross-section is defined as a cross-section whose shape is not circular but includes a plurality of protrusions.
• a cross-section having a shape in which a plurality of protrusions extend from the center thereof may be referred to as a non-circular cross-section.
• the medium substrate When the tobacco rod 31 is manufactured, the medium substrate may be filled so as to be inserted into the lyocell tow.
• a plurality of lyocell fibers, which are included in or constitute the lyocell tow, may have spaces between the fibers, and the medium substrate may settle in the spaces between the lyocell fibers. That is, the medium substrate may be filled in a dispersed form in the lyocell tow. Accordingly, since the medium substrate is located in the spaces between the plurality of lyocell fibers included in or constituting the lyocell tow, the medium substrate may settle in the lyocell tow. Therefore, the medium substrate may be filled or settled in the lyocell filter so as not to leak out to the outside in a form in which the medium substrate is surrounded by the lyocell filter.
• the tobacco rod 31 may be manufactured by injecting a medium substrate into or onto the tow, for example, using a method, such as free fall and the like, while the tow constituting the filter is spread out, and wrapping or rolling the tow into which the medium substrate has been injected to form a predetermined shape, such as a cylindrical shape, during the process of manufacturing the tobacco rod 31. Accordingly, the medium substrate may be inserted and filled so as to be randomly or uniformly distributed along the entire region or part of the region of the lyocell tow. In other words, since the medium substrate is located in the spaces between the lyocell fibers included in or constituting the lyocell tow, the medium substrate may be filled in a dispersed form in the lyocell tow.
• the medium substrate may be a certain type of tobacco material.
• the medium substrate may take the form of tobacco cut filler, tobacco particles, tobacco sheets, tobacco beads, tobacco granules, tobacco powder, and/or tobacco extracts.
• the tobacco material may include, for example, one or more of tobacco leaves, tobacco veins, expanded tobacco, shredded cut filler, reconstituted tobacco leaf cut filler, and reconstituted tobacco.
• the filter rod 32 may be a cylindrical rod, or may also be a tubular rod including a hollow formed therein. Also, the filter rod 32 may be a recessed rod. When the filter rod 32 is composed of a plurality of segments, at least one of the plurality of segments may be manufactured in a different shape from the other segments.
• the length or diameter of the first segment 321 may vary depending on the shape of the smoking article 3.
• the length of the first segment 321 may be appropriately adjusted in the range of 7 mm to 20 mm.
• the first segment 321 may have a length of approximately 12 mm, but the present invention is not limited thereto.
• the first segment 321 may prevent the internal material of the tobacco rod 31 from being pushed backward (i.e., in a direction opposite to the insertion direction) and also provide an aerosol cooling effect.
• the first segment 321 is a cellulose acetate filter including a hollow formed therein, the diameter of the hollow of the first segment 321 may be appropriately adjusted in the range of 2 mm to 4.5 mm.
• the diameter of the hollow of the first segment 321 may be appropriately adjusted in the range of 2 mm to 5.5 mm, and an appropriate value in the range of 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 may be selected, but the present invention is not limited thereto.
• the inner diameter of the hollow may be appropriately adjusted in the range of 5 mm to 7.5 mm, and more preferably 6 mm to 7 mm, but the present invention is not limited thereto.
• the excellent heat resistance of the lyocell tow may effectively prevent the first segment 321 from being deformed due to heat transferred from a heater configured to heat the smoking article 3 or an aerosol generated in the smoking article 3.
• the second segment 322 may be manufactured so that a flavor is generated by spraying a flavoring liquid onto the second segment 322.
• separate fibers coated with the flavoring liquid may be inserted into the interior of the second segment 322.
• the aerosol generated in the tobacco rod 31 is cooled as it passes through the first segment 321, and the cooled aerosol is delivered to the user through the second segment 322. Therefore, when a flavoring element is added to the second segment 322, an effect of enhancing the persistence of the flavor delivered to the user may be achieved.
• the front-end plug 33 may serve to prevent a liquefied aerosol from flowing into the aerosol generation device (the reference numeral '1' in FIGS. 1 to 3 ) from the tobacco rod 31 during smoking.
• the length or diameter of the front-end plug 33 may vary depending on the shape of the smoking article 3.
• the length of the front-end plug 33 may be appropriately adjusted in the range of 4 mm to 20 mm.
• the front-end plug 33 may have a length of approximately 7 mm, but the present invention is not limited thereto.
• the front-end plug 33 may be manufactured to include cellulose acetate and/or lyocell. Also, the front-end plug 33 may include at least one channel formed therein, and the cross-sectional shape of the channel may be manufactured in various shapes. For example, the cross-sectional shape of the channel formed in the front-end plug 33 may be formed in various shapes such as a trilobal shape, a tetralobal shape, a multilobal shape, a polygonal shape, a hard shape, and the like.
• the first wrapper 351 may be general filter wrapping paper combined with metal foil. In some embodiments, the first wrapper 351 may be general filter wrapping paper combined with aluminum foil.
• the second wrapper 352 and the third wrapper 353 may be made of general filter wrapping paper. For example, the second wrapper 352 and the third wrapper 353 may each independently be porous wrapping paper or non-porous wrapping paper.
• the third wrapper 353 configured to wrap the first segment 321 has a basis weight greater than or equal to a certain value, and may include grease-resistant hard wrapping paper treated to be grease-resistant and/or general hard wrapping paper not treated to be grease-resistant, or may be composed (i.e., made) of grease-resistant hard wrapping paper treated to be grease-resistant and/or general hard wrapping paper not treated to be grease-resistant.
• the third wrapper 353 since the third wrapper 353 includes or is composed of hard wrapping paper having a basis weight greater than or equal to a predetermined value, the third wrapper 353 may not only function as a packaging material configured to wrap the first segment 321 including lyocell tow, but also perform a function of imparting a certain level of hardness or higher to the filter rod 32 according to the present invention.
• the third wrapper 353 may include grease-resistant hard wrapping paper, and/or general hard wrapping paper other than grease-resistant hard wrapping paper.
• the third wrapper 353 may include grease-resistant hard wrapping paper and/or general hard wrapping paper other than grease-resistant hard wrapping paper having a basis weight of 30 gsm to 180 gsm, preferably 35 gsm to 170 gsm, more preferably 40 gsm to 160 gsm, even more preferably 50 gsm to 158 gsm, even more preferably 60 gsm to 155 gsm, even more preferably 70 gsm to 150 gsm, and most preferably 75 gsm to 150 gsm, but the present invention is not limited thereto.
• a lyocell filter was manufactured using lyocell tow having a single fiber fineness of 3.33 dtex (a mono denier of 3.0) and a total fiber fineness of 3,889 tex (a total denier of 35,000) under the conditions shown in Example 1 in Table 1, and a cellulose acetate filter, in which a plasticizer was added to cellulose acetate tow having a single fiber fineness of 3.00 dtex (a mono denier of 2.7) and a total fiber fineness of 3,889 tex (a total denier of 35,000), was manufactured under the conditions shown in Comparative Example 1 in Table 1.
• Table 1 Classification Weight (mg) Circumference (mm) Resistance to draw (mmH 2 0)
• FIG. 5A the left side shows the filter of Comparative Example 1 before heating, and the right side shows the filter of Example 1 before heating.
• FIG. 5B the left side shows the filter of Comparative Example 1 after heating, and the right side shows the filter of Example 1 after heating.
• Tobacco granules were filled into lyocell tow having a single fiber fineness of 3.33 dtex (a mono denier of 3.0) and a total fiber fineness of 3,889 tex (a total denier of 35,000), and the lyocell tow was then wrapped with a paper wrapper to manufacture a tobacco granule/lyocell filter having a length of 84 mm under the conditions shown in Example 2 in Table 2.
• the lyocell filter of Example 2 and the cellulose acetate filter of Comparative Example 2 were cut to a length of 15 mm to manufacture the smoking article 3 shown in FIG. 4 .
• a heating-type cigarette (a smoking article) having a front-end plug having a length of 7 mm, the tobacco rod of Example 2 or Comparative Example 2, a first segment including a paper tube filter having a length of 12 mm and an inner diameter of 6 mm, and a second segment having a length of 14 mm and composed of cellulose acetate was manufactured, as in the smoking article 3 shown in FIG. 4 .
• the experiment was conducted on the smoking article according to Example 2 in a smoking room having an internal temperature of approximately 22 ⁇ 2°C and an internal relative humidity of approximately 60 ⁇ 5% (specifically, a temperature of approximately 21.9°C and an internal relative humidity of 64.3%).
• the experiment was conducted under smoking conditions, that is, HC conditions (Puff volume: 55 mL/Puff frequency: 30 s/Puff duration: 2 s/Puff count: 9 puffs).
• the generated smoke was collected on a Cambridge filter (i.e., a Cambridge filter pad (CFP)) and analyzed .
• Example 2 in which the tobacco rod is composed of lyocell tow filled with tobacco granules, due to the heat resistance and nicotine retention effects of lyocell tow, the nicotine content in the tobacco rod remains at 0.32 mg even after smoking, which is 40% of the nicotine content before smoking, which also indicates that nicotine retention is also stable.

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• General Chemical & Material Sciences (AREA)
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• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Toxicology (AREA)
• Cigarettes, Filters, And Manufacturing Of Filters (AREA)

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