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
  • 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
  • A24D3/04—Tobacco smoke filters characterised by their shape or structure
• • 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 in which a front-end filter segment, which is located upstream of a medium portion and comes into contact with the medium portion, is composed of lyocell tow including a plurality of lyocell fibers, thereby preventing a liquefied aerosol from flowing into an aerosol generation device from the medium portion during smoking, preventing the tow from melting due to heat applied to heat the medium portion, and improving the dispersion uniformity of a humectant in the front-end filter segment.
• the transfer of tobacco components e.g., nicotine, tar
• the generation of an atomized aerosol vapor
• the smoking articles operate by heating a stick to a high temperature of approximately 150 to 300°C using a device and transferring the heat of the heated stick to a medium portion so that the tobacco components such as nicotine and the like can be smoothly transferred as the temperature of the medium portion rises.
• a separate heating rod may be inserted into the medium portion to heat the medium portion.
• the smoking article may further include a cooling structure arranged between the medium portion and the mouthpiece portion.
• the smoking article may further include a support structure arranged between the medium portion and the cooling structure.
• the support structure may include at least one of a lyocell filter and a cellulose acetate filter.
• the support structure may include at least one of a lyocell filter and a cellulose acetate filter, and the support structure may have a tube shape having a hollow formed therein.
• the cooling structure may include at least one of a lyocell filter, a paper tube filter, and a cellulose acetate filter.
• the cooling structure may have a tube shape having a hollow formed therein.
• the humectant may be dispersed throughout the entire region of the lyocell tow.
• the humectant may include at least one of glycerin or propylene glycol.
• the medium portion may have a length of 5 mm to 14 mm.
• the front-end filter segment may have a length of 3 mm to 12 mm.
• the medium portion may be characterized by having a length of 5 mm to 14 mm
• the front-end filter segment may be characterized by having a length of 3 mm to 12 mm.
• Another aspect of the present application provides a system including the above-described smoking article and an aerosol generation device to which the smoking article is applied.
• 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 may 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 “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 tow includes or is composed of a plurality of lyocell fibers.
• the lyocell tow may refer to a bundle formed by cross-linking adjacent lyocell fibers.
• 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 "reconstituted tobacco leaf” or “reconstituted tobacco sheet” may refer to a sheet made by combining tobacco by-products selected from the group consisting of stems, dust, particulates, and a combination thereof with a binder.
• the reconstituted tobacco leaf is a homogenized tobacco leaf.
• a "recessed filter” may refer to a filter including one or more pores.
• a “hollow” may refer to a channel extending along in the longitudinal direction.
• the "wrapping" of a medium portion, a support structure, a cooling structure, a front-end filter segment, and/or a mouthpiece portion with a wrapper may refer to at least a portion of the peripheral surface along the longitudinal axis of the medium portion, the support structure, the cooling structure, the front-end filter segment, and/or the mouthpiece portion being surrounded by the wrapper.
• 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.
• the hardness of a filter is a value obtained by quantifying the degree to which the diameter of the filter is maintained when the filter is pressed with a certain level of force in a direction perpendicular to the longitudinal direction of the filter, and may be the ratio of the diameter of the filter after the force is applied to the diameter of the filter before the force is applied expressed as a percentage.
• the hardness (%) of the filter may be calculated as (D-a)/D ⁇ 100%.
• D represents the diameter of the filter
• a represents the distance at which the filter is lowered by a 300 g weight (i.e., the filter is pressed).
• the measured value necessary for calculating the hardness may be obtained using, for example, DHT 200 TM of Filtrona.
• the force applied to the filter may be considered to be a value equivalent to the force applied when an actual user holds a smoking article.
• total fiber fineness of lyocell tow or cellulose acetate tow refers to a fiber fineness of a multifilament of lyocell fibers or cellulose acetate fibers constituting the lyocell tow or cellulose acetate tow.
• roundness refers to a degree of deviation from a geometric circle.
• the roundness of a filter may be defined as (radius of smaller circle/radius of larger circle) ⁇ 100% when two imaginary circles that come into contact with at least one point of the outer circumference of the filter in the cross-section of the filter and have the smallest distance from each other among concentric circles with different radii are drawn.
• resistance to draw refers to a difference in static pressure between both ends of a sample when an airflow passes through the sample.
• PDC refers to a value obtained by measuring the resistance to draw in a state in which the medium portion is open, the perforations of the filter portion are blocked, and the inflow of outside air is blocked
• PDO refers to a value obtained by measuring the resistance to draw in a state in which the medium portion is open, the perforations of the filter portion are not blocked, and the inflow of outside air is allowed.
• the resistance to draw may be measured using the method specified in ISO standard 6565:2015.
• the resistance to draw may refer to a difference in static pressure between both ends of the sample when an airflow passes through the sample under normal conditions (22 ⁇ 2 °C and 60 ⁇ 5% relative humidity) with a volume flow rate of 17.5 mm/s at the discharge end.
• an organic acid is a general term for organic compounds that are acidic.
• component % and “component proportion” refer to the weight % of the component and the weight proportion of the 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.
• a Cambridge filter (Cambridge filter pad (CFP)) on which the smoke components are collected is immersed in methanol for a predetermined time (for example, 2 hours to 16 hours), treated using a shaker device, and then passed through a polytetrafluoroethylene (PTFE) syringe filter to remove impurities. Thereafter, the content of the components included in the total particulate matter (TPM) of the collected smoke may be measured using a GC/MS device.
• the immersion time may be 20 minutes or more, particularly for tar or nicotine, and 2 hours or more for PG and Gly.
• the aerosol-forming substrate or the medium portion 110 may contain at least one flavoring agent (or, may be referred to as a "flavoring material”) and/or other additives such as an organic acid.
• the flavoring agent may include licorice, sucrose, fructose syrup, an artificial sweetener (e.g., Isosweet TM ), cocoa, lavender, cinnamon, cardamom, celery, fenugreek, cascarilla, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, mint oil, cinnamon, caraway, cognac, jasmine, chamomile, menthol, ylang ylang, sage, spearmint, ginger, coriander, and/or coffee, but the present invention is not limited thereto.
• the front-end filter segment 111 includes or is composed of lyocell tow that does not melt even at high temperatures
• the high heat resistance characteristics of lyocell tow may minimize deformation of the structure of the front-end filter segment 111 when a heating rod is inserted into the front-end filter segment 111 and heat is applied for heating and/or when heat is applied to the front-end filter segment 111 arranged adjacent to the medium portion 110 using an external heater. Accordingly, the smoke components may also be generally maintained uniformly over the smoking time, thereby providing the user with a more improved smoking experience.
• the support structure 120 may be located downstream (i.e., on the other side opposite to one side) of the medium portion 110, and the upstream side of the support structure 120 may come into contact with the downstream side of the medium portion 110.
• the support structure 120 may function as a support member for the medium portion 110.
• the support structure 120 may function to prevent the medium portion 110 from moving downstream.
• the support structure 120 may also serve as a passage for aerosol (e.g., mainstream smoke) formed in the medium portion 110.
• the support structure 120 includes a tubular structure having a hollow 120H formed therein, and the hollow 120H may function as a channel for the aerosol (i.e., through which the aerosol moves).
• the hollow 120H may extend along the longitudinal direction of the support structure 120.
• the hollow 120H is located at the center of a cross-section perpendicular to the longitudinal direction of the support structure 120 and may extend along the longitudinal direction of the support structure 120.
• the hollow 120H and the support structure 120 may have a coaxial structure along the longitudinal direction.
• the support structure 120 may have a length of approximately 8 mm to 14 mm (for example, 10 mm or 12 mm), but the present invention is not limited thereto. In some embodiments, the length of the support structure 120 may be shorter than or equal to the length of a cooling structure 130 described below, but the present invention is not limited thereto.
• the binder included in the cooling structure 130 may include the exemplary materials listed as the binder included in the support structure 120, but the present invention is not limited thereto.
• the binder included in the cooling structure 130 may be the same as or different from the binder included in the support structure 120.
• the binder included in the cooling structure 130 may include at least one of a polyester including one or more selected from the group consisting of alkylenes, arylenes, and heteroarylenes having 5 to 12 carbon atoms, hydroxypropyl methyl cellulose (HPMC), ethyl cellulose (EC), methyl cellulose (MC), carboxymethyl cellulose (CMC), polyvinyl pyrrolidone (PVP), polyvinyl alcohol (PVA), ethylene vinyl acetate (EVAc), dextrin, tapioca starch, corn starch, wheat starch, potato starch, sweet potato starch, cationic starch, esterified starch, guar gum, xanthan gum, gum arabic, carrageenan, konjac, and agar.
• a polyester including one or more selected from the group consisting of alkylenes, arylenes, and heteroarylenes having 5 to 12 carbon atoms, hydroxypropyl methyl cellulose (HPMC), ethyl
• the mouthpiece portion 140 may be made of a cellulose acetate filter and/or a lyocell filter. That is, the mouthpiece portion 140 may be manufactured using cellulose acetate fibers (i.e., cellulose acetate tow) as a filter material and/or using lyocell fibers (i.e., lyocell tow) as a filter material. Although not shown, the mouthpiece portion 140 may also be made of a recessed filter. The mouthpiece portion 140 may have a length of approximately 10 mm to 14 mm (for example, 12 mm), but the present invention is not limited thereto.
• the mouthpiece portion 140 may include at least one capsule.
• the capsule may have a structure in which a liquid including a flavoring is wrapped with a film.
• the capsule may have a spherical or cylindrical shape.
• the support structure 120, the cooling structure 130, and the mouthpiece portion 140 may all function as filters for aerosols.
• each component may be referred to as a "filter segment” to emphasize their function as the filters.
• the support structure 120, the cooling structure 130, and the mouthpiece portion 140 may be referred to as a first filter segment, a second filter segment, and a third filter segment, respectively.
• the medium portion 110 may be wrapped with a medium portion wrapper (not shown), and the support structure 120, the cooling structure 130, and the mouthpiece portion 140 may be wrapped with a first filter wrapper (not shown), a second filter wrapper (not shown), and a third filter wrapper (not shown), respectively.
• a method of wrapping the smoking article 100 and components thereof is not limited thereto and may vary.
• the wrapper 150 may have perforations 160 (see FIG. 1 ) formed therein, the perforations 160 being arranged along the circumference of the cooling structure 130, or may not have perforations (no perforations, see FIG. 2 ) formed therein. In some embodiments, the wrapper 150 may have perforations 160 (see FIG. 1 ) formed therein, the perforations 160 being arranged along the circumference of the cooling structure 130, particularly along the circumference of a cross-section perpendicular to the longitudinal direction of the cooling structure 130. When the perforations 160 are formed in the wrapper 150, outside air may be introduced into the cooling structure 130 through the plurality of perforations 160.
• the plurality of perforations 160 may serve to lower the surface temperature of the mouthpiece portion and the temperature of mainstream smoke delivered to the smoker through the introduction of outside air.
• no perforations may be formed in the wrapper 150, but the present invention is not limited thereto. Even when no perforations are formed in the wrapper 150, as described later, the lyocell material constituting the support structure 120 may have excellent moisture absorption performance in the mainstream smoke due to its excellent moisture affinity, thereby significantly reducing the feeling of heat of the mainstream smoke passing through the support structure 120.
• 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.
• the filters of Example 1 and Comparative Example 1 were heated to 250°C or higher using an external heating method under internal conditions of an internal temperature of approximately 22 ⁇ 2°C and an internal relative humidity of approximately 60 ⁇ 5%.
• the filter before heating was photographed and shown in FIG. 3A
• the filter after heating was photographed and shown in FIG. 3B .
• the left side is the filter of Comparative Example 1 before heating, and the right side is the filter of Example 1 before heating.
• FIG. 3B the left side is the filter of Comparative Example 1 after heating, and the right side is the filter of Example 1 after heating.
• the shape of the cellulose acetate filter of Comparative Example 1 is significantly different before and after heating, and no substantial shape remains because the cellulose acetate filter melts due to heat after heating.
• the lyocell filter of Example 1 maintains a substantially similar shape before and after heating although only some soot is generated after heating. This indicates that cellulose acetate is a fiber having an amorphous structure and completely melts due to its weak heat resistance characteristics but lyocell has strong heat resistance characteristics.
• a lyocell filter having a length of 84 mm was manufactured under the conditions shown in Example 2 in Table 2 by wrapping 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) with wrapping paper, and a cellulose acetate filter having a length of 84 mm was manufactured under the conditions shown in Comparative Example 2 in Table 2 by adding a plasticizer to cellulose acetate tow, which has 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) and then wrapping the cellulose acetate tow with wrapping paper.
• FIG. 4A it can be seen that the cross-section of the filter of Comparative Example 2, in which glycerin was injected into the cellulose acetate filter, shows that after the glycerin was added, it was concentrated mostly in the center of the filter and spread only in one direction, thereby forming spots.
• FIG. 4B it can be seen that the cross-section of the filter of Example 2, in which glycerin was injected into the lyocell filter, shows that no spots were formed.
• Example 3 was cut to 5 mm, and a heating-type cigarette (as the smoking article 100 shown in FIG. 1 ), which has a structure including a front-end filter segment including the filter of Example 3 having a length of 5 mm; a medium portion having a length of 7 mm; a support structure made of a cellulose acetate material and having a hollow having an inner diameter of 2.7 mm, an outer diameter of 7 mm, and a length of 10 mm; a cooling structure made of a paper tube and having an inner diameter of 6 mm and a length of 14 mm; and a mouthpiece portion composed of cellulose acetate tow and having a length of 12 mm, was manufactured, and the smoking article was then manufactured under the conditions shown in Table 4 below.
• the moisture transfer amount in the aerosol is 15.15 mg, and thus the smoking article has an excellent effect of reducing the smoker's feeling of heat, thereby improving the user's smoking quality.
• the residual amount of nicotine in the front-end filter segment after smoking is 0.19 mg, indicating that some of the nicotine in the medium portion moves upstream in a direction opposite to the direction in which the mouthpiece is located after smoking.
• the smoking article functions to prevent the nicotine remaining in the front-end filter segment from escaping into the aerosol generation device due to the front-end filter segment being arranged to come into contact with the upstream side of the medium portion. Therefore, the smoking article has the advantages of preventing the aerosol generation device from being contaminated with the extract generated during smoking and keeping the aerosol generation device clean.
• FIGS. 5 to 7 show various types of aerosol generation devices to which smoking articles according to some embodiments of the present disclosure may be applied.
• FIG. 5 is an exemplary block diagram showing a cigarette-type aerosol generation device 1000
• FIGS. 6 and 7 are exemplary configuration diagrams showing a hybrid-type aerosol generation device 1000 in which a liquid and cigarette are used together.
• the aerosol generation device 1000 will be briefly described.
• the aerosol generation device 1000 may be a device configured to generate an aerosol through a cigarette 2000 inserted into an internal space.
• the cigarette 2000 may correspond to the smoking article 100 described above.
• the cigarette 2000 may include the medium portion 110, the front-end filter segment 111, and the mouthpiece portion 140 described above. More specifically, when the cigarette 2000 is inserted into the aerosol generation device 1000, the aerosol generation device 1000 may operate the heater portion 1300 to generate an aerosol from the cigarette 2000. The generated aerosol may be delivered to the user through the cigarette 2000.
• the aerosol generation device 1000 may include a battery 1100, a controller 1200, and a heater portion 1300. However, only the components related to the embodiments of the present disclosure are shown in FIG. 5 . Therefore, a person skilled in the art to which the present disclosure pertains may understand that other general-purpose components may be further included in addition to the components shown in FIG. 5 .
• the aerosol generation device 1000 may further include a display capable of outputting visual information and/or a motor configured to output tactile information, and/or at least one sensor (such as a puff detection sensor, a temperature detection sensor, and/or a cigarette insertion detection sensor).
• a display capable of outputting visual information and/or a motor configured to output tactile information
• at least one sensor such as a puff detection sensor, a temperature detection sensor, and/or a cigarette insertion detection sensor.
• the battery 1100 supplies the power used to operate the aerosol generation device 1000.
• the battery 1100 may supply power to heat the heater portion 1300, and may supply the power required for the controller 1200 to operate.
• the battery 1100 may supply the power required for the display, sensor, motor, and the like (not shown) installed in the aerosol generation device 1000 to operate.
• the controller 1200 may control the overall operation of the aerosol generation device 1000.
• the controller 1200 may control the operation of not only the battery 1100 and the heater portion 1300, but also other components that may be included in the aerosol generation device 1000.
• the controller 1200 may also check the status of each of the components of the aerosol generation device 1000 to determine whether the aerosol generation device 1000 is in an operable state.
• the controller 1200 may include at least one processor.
• the processor may be implemented as an array of multiple logic gates, or may be implemented as a combination of a general-purpose microprocessor and a memory in which a program that may be executed by the microprocessor is stored. Also, it will be understood by those skilled in the art to which the present disclosure pertains that the processor may be implemented as other types of hardware.
• the heater portion 1300 may heat the cigarette 2000 using power supplied from the battery 1100.
• a heating element of the heater portion 1300 may be inserted into a portion of the inner region of the cigarette 2000 to increase the temperature of an aerosol-forming substrate in the cigarette 2000.
• the heater portion 1300 may alternatively or additionally include an external heating element, unlike that shown in FIG. 5 .
• the heating element of the heater portion 1300 may be arranged on the outside of the cigarette 2000 inserted into the device 1000.
• the heater portion 1300 may also include a plurality of heating elements.
• the heater portion 1300 may include a plurality of internal heating elements or a plurality of external heating elements.
• the heater portion 1300 may also include one or more internal heating elements and one or more external heating elements.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Cigarettes, Filters, And Manufacturing Of Filters (AREA)

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