Cooling section for aerosol-generating article and aerosol-generating article comprising cooling section

Abstract

An aerosol-generating article according to an embodiment includes a tobacco rod comprising a tobacco material, a cooling section downstream of the tobacco rod, and a mouthpiece downstream of the cooling section, and the cooling section includes: a first sheet forming at least a portion of an outer surface of the cooling section; a second sheet forming a path within the cooling section through which the aerosol moves in a length direction of the aerosol-generating article; and a third sheet material which is corrugated between the first sheet material and the second sheet material.

Description

Technical Field

[0001] One or more embodiments relate to a cooling section for an aerosol-generating article and an aerosol-generating article including the cooling section. More specifically, one or more embodiments relate to a cooling section capable of improving cooling efficiency and an aerosol-generating article including the cooling section. Background Art

[0002] Recently, there is an increasing demand for alternative methods that overcome the disadvantages of ordinary cigarettes. For example, there is an increasing demand for systems that generate aerosols by heating cigarettes or aerosol generating materials using an aerosol generating device instead of burning the cigarette. Therefore, research on heating-type aerosol generating devices is actively being conducted. Summary of the invention

[0003] Technical issues

[0004] One or more embodiments provide a cooling section for an aerosol-generating article and an aerosol-generating article including the cooling section. Based on a heated aerosol-generating article that generates an aerosol when an aerosol-generating substance in the aerosol-generating article is heated, a user may feel heat when the aerosol moves in the aerosol-generating article, and thus an element for cooling the aerosol may be required.

[0005] Particularly in summer, the temperature of the aerosol delivered to the user may be higher due to the moisture contained in the aerosol. Therefore, a component that effectively performs a cooling function by removing moisture from the aerosol may be required.

[0006] Problems to be solved by the embodiments are not limited to the above-mentioned problems, and problems not mentioned can be clearly understood by a person of ordinary skill in the art to which the embodiments pertain based on the specification and the accompanying drawings.

[0007] Technical solutions to technical problems

[0008] According to an embodiment, an aerosol generating article includes a tobacco rod containing tobacco material, a cooling section located downstream of the tobacco rod, and a mouthpiece located downstream of the cooling section, and the cooling section includes: a first sheet material, which forms at least a portion of the outer surface of the cooling section; a second sheet material, which forms a path inside the cooling section for the aerosol to move through along the length direction of the aerosol generating article; and a third sheet material, which is crimped between the first sheet material and the second sheet material.

[0009] The cooling section of the aerosol generating article includes: a first sheet material, which forms at least a portion of the outer surface of the cooling section; a second sheet material, which forms a path inside the cooling section for the aerosol to move through along the length direction of the aerosol generating article; and a third sheet material, which is wrinkled between the first sheet material and the second sheet material.

[0010] Beneficial Effects of the Invention

[0011] The aerosol-generating article according to one or more embodiments can reduce the heat felt on the user's hands or mouth when the aerosol moves during smoking by improving the cooling function.

[0012] The effects of the present disclosure are not limited to the above-mentioned effects, and those skilled in the art can clearly understand unmentioned effects based on the present specification and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figures 1 to 3 is a diagram showing an example in which a cigarette is inserted into an aerosol generating device according to an embodiment.

[0014] Figure 4a and Figure 4b is a cross-sectional view illustrating an example of an aerosol-generating article.

[0015] Figure 5a is a side view of a cooling section for an aerosol-generating article according to an embodiment.

[0016] Figure 5b yes Figure 5a Cross-sectional view of .

[0017] Figure 6a The movement of the airflow in the first airflow channel in the cooling section according to the embodiment is schematically shown.

[0018] Figure 6b The movement of the airflow in the second airflow channel in the cooling section according to the embodiment is schematically shown.

[0019] Figure 6c The movement of the airflow in the third airflow channel in the cooling section according to the embodiment is schematically shown.

[0020] Figure 7 is a diagram for explaining in detail a corrugated portion in a third sheet in a cooling section according to an embodiment. DETAILED DESCRIPTION

[0021] Regarding the terms in various embodiments, the functions of the structural elements in the various embodiments of the present disclosure are considered to select the currently widely used general terms. However, the meaning of these terms can be changed according to the intention, judicial precedents, the emergence of new technologies, etc. In addition, in some cases, the applicant can arbitrarily select terms in specific circumstances. In this case, the meaning of the terms will be described in detail at the corresponding parts in the description of the present disclosure. Therefore, the terms used in the various embodiments of the present disclosure should be defined based on the meaning of the terms and the description provided herein.

[0022] In addition, unless explicitly described to the contrary, the term "include" and variations such as "including" or "comprising" will be understood to mean including the stated elements but not excluding any other elements. In addition, the terms "-component", "-device" and "module" described in the application documents refer to units for processing at least one function and operation, and can be implemented by hardware components or software components and combinations thereof.

[0023] As used herein, when an expression such as "at least any one" is placed after an arranged element, the expression modifies all elements rather than each arranged element. For example, the expression "at least any one of a, b, and c" should be interpreted as: including a, including b, including c, or including a and b, including a and c, including b and c, or including a, b, and c.

[0024] In one embodiment, the aerosol generating device may be a device that electrically heats a cigarette contained in the internal space to generate aerosol.

[0025] The aerosol generating device may comprise a heater. In an embodiment, the heater may be a resistive heater. For example, the heater may comprise an electrically conductive trace, and the heater may be heated when an electric current flows through the electrically conductive trace.

[0026] The heater may include a tube-type heating element, a plate-type heating element, a needle-type heating element, or a rod-type heating element, and may heat the inside or outside of the cigarette depending on the shape of the heating element.

[0027] The cigarette may include a tobacco rod and a filter rod. The tobacco rod may be formed into sheets, filaments or small scraps cut from tobacco sheets. In addition, the tobacco rod may be surrounded by a heat conductive material. For example, the heat conductive material may be, but is not limited to, a metal foil such as an aluminum foil.

[0028] The filter rod may include a cellulose acetate filter. The filter rod may include at least one segment. For example, the filter rod may include a first segment configured to cool the aerosol and a second segment configured to filter specific components in the aerosol.

[0029] In another embodiment, the aerosol generating device may be a device that generates an aerosol by using a cartridge containing an aerosol generating substance.

[0030] The aerosol generating device may include a cartridge for containing an aerosol generating substance and a main body for supporting the cartridge. The cartridge may be detachably connected to the main body, but is not limited thereto. The cartridge may be integrally formed or assembled with the main body, and the cartridge may also be fixed to the main body without being removed from the main body by the user. The cartridge may be mounted on the main body, and an aerosol generating substance may be contained in the cartridge. However, the present disclosure is not limited thereto. The aerosol generating substance may also be injected into the cartridge when the cartridge is connected to the main body.

[0031] The cartridge may contain an aerosol-generating substance in any of a variety of states, such as a liquid, solid, gaseous, gel, etc. The aerosol-generating substance may include a liquid composition. For example, the liquid composition may be a liquid containing a tobacco substance having a volatile tobacco flavor component, or a liquid containing a non-tobacco substance.

[0032] The cartridge can be operated by an electrical signal or a wireless signal transmitted from the main body to perform the function of generating an aerosol by converting the phase of the aerosol generating substance in the cartridge into a gas phase. Aerosol may refer to a gas in which vaporized particles generated by the aerosol generating substance are mixed with air.

[0033] In another embodiment, the aerosol generating device can generate an aerosol by heating the liquid composition, and the generated aerosol can be delivered to the user through a cigarette. That is, the aerosol generated by the liquid composition can move along the airflow channel of the aerosol generating device, and the airflow channel can be configured to allow the aerosol to be delivered to the user by passing through the cigarette.

[0034] In another embodiment, the aerosol generating device may be a device that generates aerosol from an aerosol generating substance by using an ultrasonic vibration method. At this time, the ultrasonic vibration method may refer to a method of generating aerosol by converting an aerosol generating substance into an aerosol through ultrasonic vibration generated by a vibrator.

[0035] The aerosol generating device may include a vibrator, and a short-period vibration is generated by the vibrator to convert the aerosol generating substance into an aerosol. The vibration generated by the vibrator may be an ultrasonic vibration, and the frequency band of the ultrasonic vibration may be a frequency band of about 100 kHz to about 3.5 MHz, but is not limited thereto.

[0036] The aerosol generating device may further comprise a core that absorbs the aerosol generating substance.For example, the core may be arranged to surround at least one region of the vibrator, or may be arranged to contact at least one region of the vibrator.

[0037] As voltage (e.g., AC voltage) is applied to the vibrator, heat and / or ultrasonic vibration may be generated from the vibrator, and the heat and / or ultrasonic vibration generated from the vibrator may be transferred to the aerosol-generating substance absorbed in the core. The aerosol-generating substance absorbed in the core may be converted into a gas phase by the heat and / or ultrasonic vibration transferred from the vibrator, and thereby an aerosol may be generated.

[0038] For example, the viscosity of the aerosol generating substance absorbed in the core may be reduced by heat generated by the vibrator, and since the aerosol generating substance with reduced viscosity is granulated by ultrasonic vibration generated from the vibrator, aerosol may be generated, but is not limited thereto.

[0039] In another embodiment, the aerosol generating device is a device that generates aerosol by heating an aerosol generating article housed in the aerosol generating device by induction heating.

[0040] The aerosol generating device may include a susceptor and a coil. In an embodiment, the coil may apply a magnetic field to the susceptor. When power is supplied to the coil from the aerosol generating device, a magnetic field may be formed inside the coil. In an embodiment, the susceptor may be a magnetic body that generates heat by an external magnetic field. When the susceptor is positioned within the coil and a magnetic field is applied to the susceptor, the susceptor generates heat to heat the aerosol generating article. In addition, optionally, the susceptor may be positioned inside the aerosol generating article.

[0041] In another embodiment, the aerosol generating device may further comprise a stand.

[0042] The aerosol generating device may be configured as a system together with a separate stand. For example, the stand may charge a battery of the aerosol generating device. Alternatively, the heater may be heated when the stand and the aerosol generating device are coupled to each other.

[0043] Hereinafter, the present disclosure will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the present disclosure are shown so that a person skilled in the art can easily implement the present disclosure. The embodiments may be implemented in any of the various embodiments of the aerosol generating device described above or in different forms, and are not limited to the embodiments described herein.

[0044] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0045] Figures 1 to 3is a diagram showing an example in which a cigarette is inserted into an aerosol generating device according to an embodiment.

[0046] refer to Figure 1 The aerosol generating device 1 may include a battery 11, a controller 12 and a heater 13. Figure 2 and Figure 3 , the aerosol generating device 1 may further include a vaporizer 14. In addition, the aerosol generating article 2 may be inserted into the inner space of the aerosol generating device 1.

[0047] Figures 1 to 3 Components of the aerosol generating device 1 related to the present embodiment are shown. Therefore, a person skilled in the art of the present embodiment will understand that, in addition to Figures 1 to 3 In addition to the components shown in FIG. 1 , the aerosol generating device 1 may further include other common components.

[0048] also, Figure 2 and Figure 3 The aerosol generating device 1 is shown to include a heater 13. However, the heater 13 may be omitted if desired.

[0049] Figure 1 The battery 11, the controller 12 and the heater 13 are shown to be arranged in series. Figure 2 The battery 11, the controller 12, the vaporizer 14 and the heater 13 are shown to be arranged in series. Figure 3 The vaporizer 14 is shown to be arranged in parallel with the heater 13. However, the internal structure of the aerosol generating device 1 is not limited to Figures 1 to 3 In other words, according to the design of the aerosol generating device 1, the battery 11, the controller 12, the heater 13 and the vaporizer 14 may be arranged in different ways.

[0050] When the aerosol-generating article 2 is inserted into the aerosol-generating device 1, the aerosol-generating device 1 may operate the vaporizer 14 to generate aerosol from the vaporizer 14. The aerosol generated by the heater 13 and / or the vaporizer 14 passes through the aerosol-generating article 2 and is delivered to the user.

[0051] In some cases, the aerosol-generating device 1 may operate the heater 13 even if the aerosol-generating article 2 is not inserted into the aerosol-generating device 1 .

[0052] The battery 11 can provide power for operating the aerosol generating device 1. For example, the battery 11 can provide power to heat the heater 13 or the vaporizer 14, and can provide power to operate the controller 12. In addition, the battery 11 can provide power for operating a display, a sensor, a motor, etc. installed in the aerosol generating device 1.

[0053] The controller 12 can generally control the operation of the aerosol generating device 1. Specifically, the controller 12 can control not only the operation of the battery 11, the heater 13 and the vaporizer 14, but also the operation of other components included in the aerosol generating device 1. In addition, the controller 12 can check the status of each component of the aerosol generating device 1 to determine whether the aerosol generating device 1 can work.

[0054] The controller 12 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 can be executed in the microprocessor is stored. Those skilled in the art will appreciate that the processor may be implemented in other forms of hardware.

[0055] The heater 13 may be heated by the power supplied by the battery 11. For example, when the cigarette is inserted into the aerosol generating device 1, the heater 13 may be located outside the cigarette. Therefore, the heated heater 13 may increase the temperature of the aerosol generating substance in the cigarette.

[0056] The heater 13 may include a resistive heater. For example, the heater 13 may include an electrically conductive trace, and when current flows through the electrically conductive trace, the heater 13 may be heated. However, the heater 13 is not limited to the above example, and may include all heaters that can be heated to a desired temperature. Here, the desired temperature may be preset in the aerosol generating device 1, or may be set by a user.

[0057] As another example, the heater 13 may include an induction heater. Specifically, the heater 13 may include an electrically conductive coil for heating the cigarette by induction heating, and the aerosol generating article may include a susceptor that can be heated by the induction heater.

[0058] For example, the heater 13 may include a tube-type heating element, a plate-type heating element, a needle-type heating element, or a rod-type heating element, and may heat the inside or outside of the aerosol-generating article 2 according to the shape of the heating element.

[0059] In addition, the aerosol generating device 1 may include a plurality of heaters 13. Here, the plurality of heaters 13 may be inserted into the aerosol generating article 2, or may be arranged outside the aerosol generating article 2. In addition, some of the plurality of heaters 13 may be inserted into the aerosol generating article 2, while other heaters may be arranged outside the aerosol generating article 2. In addition, the shape of the heater 13 is not limited to Figures 1 to 3 The shapes shown in , and may include various shapes.

[0060] The vaporizer 14 can generate an aerosol by heating the liquid composition, and the generated aerosol can be delivered to the user through the aerosol generating article 2. In other words, the aerosol generated by the vaporizer 14 can move along the airflow channel of the aerosol generating device 1, and the airflow channel can be configured so that the aerosol generated by the vaporizer 14 passes through the aerosol generating article 2 and is delivered to the user.

[0061] For example, the vaporizer 14 may include a liquid storage, a liquid delivery element, and a heating element, but is not limited thereto. For example, the liquid storage, the liquid delivery element, and the heating element may be included in the aerosol generating device 1 as separate modules.

[0062] The liquid storage member can store a liquid composition. For example, the liquid composition can be a liquid comprising a tobacco-containing material having a volatile tobacco flavor component, or a liquid comprising a non-tobacco material. The liquid storage member can be formed to be separable from the vaporizer 14, or can be formed integrally with the vaporizer 14.

[0063] For example, the liquid composition may include water, solvents, ethanol, plant extracts, spices, flavoring agents, or vitamin mixtures. Spices may include menthol, mint, spearmint oil, and various fruity ingredients, but are not limited thereto. Flavoring agents may include ingredients that can provide users with various fragrances or tastes. The vitamin mixture may be a mixture of at least one of vitamin A, vitamin B, vitamin C, and vitamin E, but is not limited thereto. In addition, the liquid composition may include aerosol-forming substances, such as glycerol and propylene glycol.

[0064] The liquid delivery element can deliver the liquid composition of the liquid storage member to the heating element. For example, the liquid delivery element can be a core, such as cotton fiber, ceramic fiber, glass fiber or porous ceramic, but is not limited thereto.

[0065] The heating element is an element for heating the liquid composition transported by the liquid delivery element. For example, the heating element can be a metal heating wire, a metal heating plate, a ceramic heater, etc., but is not limited thereto. In addition, the heating element can include a conductive wire, such as a nickel-chromium wire, and the heating element can be positioned to be wound around the liquid delivery element. The heating element can be heated by a current supply device, and heat can be transferred to the liquid composition in contact with the heating element, thereby heating the liquid composition. Thus, an aerosol can be generated.

[0066] For example, the vaporizer 14 may be referred to as an atomizer cartridge or an atomizer, but is not limited thereto.

[0067] In addition to the battery 11, the controller 12, the heater 13, and the vaporizer 14, the aerosol generating device 1 may further include common components. For example, the aerosol generating device 1 may include a display capable of outputting visual information and / or a motor for outputting tactile information. In addition, the aerosol generating device 1 may include at least one sensor (a suction sensor, a temperature sensor, an aerosol generating article insertion detection sensor, etc.). In addition, the aerosol generating device 1 may be formed into a structure in which external air may be introduced or internal air may be exhausted even if the aerosol generating article 2 is inserted into the aerosol generating device 1.

[0068] Although Figures 1 to 3 Not shown in the figure, the aerosol generating device 1 and an additional stand may together form a system. For example, the stand may be used to charge the battery 11 of the aerosol generating device 1. Alternatively, the heater 13 may be heated when the stand and the aerosol generating device 1 are coupled to each other.

[0069] The aerosol-generating article 2 may be similar to a conventional combustible cigarette. For example, the aerosol-generating article 2 may be divided into a first part including an aerosol-generating substance and a second part including a filter or the like. Alternatively, the second part of the aerosol-generating article 2 may also include an aerosol-generating substance. For example, an aerosol-generating substance made in the form of particles or capsules may be inserted into the second part.

[0070] The entire first part may be inserted into the aerosol generating device 1, and the second part may be exposed to the outside. Alternatively, only a portion of the first part may be inserted into the aerosol generating device 1, or the entire first part and a portion of the second part may be inserted into the aerosol generating device 1. The user may inhale the aerosol while holding the second part in the mouth. In this case, an aerosol is generated by external air passing through the first part, and the generated aerosol passes through the second part and is delivered to the user's mouth.

[0071] For example, external air can flow into at least one air channel formed in the aerosol generating device 1. For example, the opening and closing of the air channel formed in the aerosol generating device 1 and / or the size of the air channel can be adjusted by the user. Therefore, the user can adjust the amount and quality of the puff. As another example, external air can flow into the aerosol generating article 2 through at least one hole formed in the surface of the aerosol generating article 2.

[0072] Reference below Figure 4a and Figure 4b An example of an aerosol-generating article 2 is described below.

[0073] Figure 4a and Figure 4bis a cross-sectional view showing an example of an aerosol-generating article 2. For example, the aerosol-generating article 2 may be a cigarette.

[0074] See also Figure 4a , the aerosol generating article 2 may include a tobacco rod 210, a cooling section 220 and a mouthpiece 230. In detail, the aerosol generating article 2 may include a tobacco rod 210 containing tobacco material, a cooling section 220 located downstream of the tobacco rod, and a mouthpiece 230 located downstream of the cooling section 220.

[0075] For example, the tobacco rod 210 may include tobacco material and additionally include humectants and / or aerosol generating substances. The aerosol generating substances may be included in a portion separate from the tobacco material. The cooling section 220 may cool the airflow generated by the tobacco rod 210. The mouthpiece 230 may include a filter material.

[0076] See also Figure 4a In the embodiment of the present invention, the tobacco rod 210, the cooling section 220, and the mouthpiece 230 may be sequentially arranged with respect to the length direction of the aerosol generating article 2. Here, the length direction of the aerosol generating article 2 may be a direction in which the length of the aerosol generating article 2 extends. For example, the length direction of the aerosol generating article 2 may be a direction from the tobacco rod 210 toward the mouthpiece 230. Therefore, the aerosol generated from the tobacco rod 210 may form an airflow by sequentially passing through the tobacco rod 210, the cooling section 220, and the mouthpiece 230, and the user may inhale the aerosol from the mouthpiece 230.

[0077] In addition, refer to Figure 4b The aerosol-generating article 2 may include a tobacco rod 210 , a cooling section 220 , a mouthpiece 230 and a support section 240 . Figure 4b The support section 240 is shown to be disposed between the tobacco rod 210 and the cooling section 220 , but the support section 240 may also be located between the cooling section 220 and the mouthpiece 230 .

[0078] As an example of the aerosol generating article 2, a cigarette may have a diameter ranging from 5 mm to 9 mm and a length of about 48 mm, but one or more embodiments are not limited thereto. The cigarette may be packaged by at least one package. The package may have at least one hole through which external air may be introduced or internal air may be exhausted. For example, the cigarette may be packaged by one package. As another example, the cigarette may be double-packaged by at least two packages.

[0079] According to one embodiment, the tobacco rod 210 of the aerosol generating article 2 may include an aerosol generating substance. For example, the aerosol generating substance may include at least one of glycerol, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol, but is not limited thereto. In addition, the tobacco rod 210 may include other additives, such as flavoring agents, humectants, and / or organic acids. In addition, the tobacco rod 210 may include a flavor liquid, such as menthol or a humectant, injected into the tobacco rod 210.

[0080] The tobacco rod 210 can be manufactured in various forms. For example, the tobacco rod 210 can be formed into a sheet or strip. In addition, the tobacco rod 210 can be formed into shredded tobacco, which is formed by the fine fragments cut from the tobacco sheet. In addition, the tobacco rod 210 can be surrounded by a heat-conducting material. For example, the heat-conducting material can be but is not limited to a metal foil, such as an aluminum foil. For example, the heat-conducting material around the tobacco rod 210 can evenly disperse the heat transferred to the tobacco rod 210, so the thermal conductivity applied to the tobacco rod can be improved and the taste of the tobacco can be improved.

[0081] In addition, the heat conductive material surrounding the tobacco rod 210 can be used as a susceptor heated by the induction heater. Here, although not shown in the figure, in addition to the heat conductive material surrounding the tobacco rod 210, the tobacco rod 210 can also include an additional susceptor.

[0082] The cooling section 220 according to the embodiment can cool the airflow passing through the tobacco rod 210. Alternatively, the cooling section 220 can cool the airflow passing through the tobacco rod 210 and the supporting section 240.

[0083] The mouthpiece 230 according to the embodiment may include a filter element. The mouthpiece 230 may include a cellulose acetate filter. The shape of the mouthpiece 230 is not limited. For example, the mouthpiece 230 may include a cylindrical rod or a tubular rod having a hollow interior. In addition, the mouthpiece 230 may include a concave rod. If the mouthpiece 230 is composed of a plurality of segments, at least one of the plurality of segments may be manufactured in a different shape.

[0084] The mouthpiece 230 may also be formed to generate a flavor. For example, a flavor liquid may be injected into the mouthpiece 230, or additional fibers coated with a flavor liquid may be inserted into the mouthpiece 230.

[0085] The aerosol generating article 2 may include a packaging member that wraps at least a portion of the tobacco rod 210 to the mouthpiece 230. In addition, the aerosol generating article 2 may include a packaging member that wraps all of the tobacco rod 210 to the mouthpiece 230. The packaging member may be a single packaging member or a combination of multiple packaging members. The outer packaging member located at the outermost portion of the aerosol generating article 2 may package the tobacco rod 210, the cooling section 220, and the mouthpiece 230.

[0086] Figure 5a is a side view of a cooling section of an aerosol-generating article according to an embodiment. In addition, Figure 5b yes Figure 5a Cross-sectional view of .

[0087] refer to Figure 5a and Figure 5b The cooling section 220 may include: a first sheet 221, which forms at least a portion of the outer surface of the cooling section 220; a second sheet 222, which forms a path in the cooling section 220 for the aerosol to move through along the length direction of the aerosol generating article 2; and a third sheet 223, which is wrinkled between the first sheet 221 and the second sheet 222.

[0088] That is, the cooling section 220 may include a second sheet 222, a first sheet 221 located on an outer portion of the cooling section 220, and a third sheet 223 corrugated between the first sheet 221 and the second sheet 222, wherein the second sheet 222 and the third sheet 223 are located in an inner portion of the cooling section 220.

[0089] In the cooling section 220 according to the embodiment, the first sheet 221 may have a thickness ranging from 120 g / m 2 Up to 160g / m 2 The second sheet 222 may have a basis weight of 50 g / m and a thickness ranging from 180 μm to 200 μm. 2 Up to 70g / m 2 The basis weight is 200 μm and the thickness is in the range of 70 μm to 90 μm.

[0090] The first sheet 221 may have a relatively large basis weight compared to the other sheets, thereby providing rigidity to the cooling section 220 and the aerosol-generating article 2 .

[0091] In the cooling section 220 according to the embodiment, the third sheet 223 may be corrugated to form a corrugated portion, and the corrugated corrugated portion may have a plurality of ridges and valleys.

[0092] The first sheet 221 may surround the ridge of the third sheet 223 and form the outer surface of the cooling section 220 by wrapping the outer surface of the third sheet 223. The ridge of the third sheet 223 may contact the first sheet 221. The first sheet 221 may have a container shape forming the outer surface of the cooling section 220. For example, referring to Figure 5a , the first sheet 221 may have a cylindrical shape, but the shape is not limited thereto.

[0093] The second sheet 222 may surround the valley-shaped portion of the third sheet 223 and wrap the inner surface of the third sheet 223, and the second sheet 222 may include a hollow hole in the second sheet. The second sheet 222 may have a container shape forming a hollow hole in the cooling section 220. For example, see Figure 5a The second sheet 222 may have a cylindrical shape, but the shape of the second sheet 222 is not limited thereto. The second sheet 222 may have a cylindrical shape having a diameter smaller than that of the first sheet 221, and the corrugated third sheet 223 may be located between the first sheet 221 and the second sheet 222.

[0094] The first sheet 221 may wrap the outer surface of the third sheet 223, and the second sheet 222 may wrap the inner surface of the third sheet 223; therefore, the cooling section 220 may include a paper tube having a three-layer structure and form three types of airflow channels 220a to 220c. That is, the airflow channel may be a first airflow channel 220a formed between the first sheet 221 and the third sheet 223, a second airflow channel 220b formed between the second sheet 222 and the third sheet 223, and a third airflow channel 220c formed in the inner space of the second sheet 222. The airflow channel may be configured to cool the aerosol passing through the cooling section 220.

[0095] The third sheet 223 may be corrugated and have a large surface area, and the third sheet may form a plurality of first airflow channels 220a between the first sheet 221 and the third sheet 223, and a plurality of second airflow channels 220b between the second sheet 222 and the third sheet 223. As described above, the airflow channels may be the first airflow channels 220a formed when the first sheet 221 surrounds the outer surface of the corrugated portion of the corrugated third sheet 223, or the airflow channels may be the second airflow channels 220b formed when the second sheet 222 surrounds the inner surface of the corrugated portion.

[0096] According to an embodiment, the third sheet 223 may include polylactic acid (PLA). For example, the third sheet 223 may be a PLA film paper or a PLA-coated paper. Since the third sheet 223 includes PLA, the third sheet 223 may cool the aerosol more effectively in a large surface area.

[0097] When the third sheet material 223 includes PLA, the third sheet material 223 may have a g / m 2 Up to 140g / m 2 The basis weight is 150 μm to 190 μm in thickness.

[0098] According to another embodiment, the third sheet 223 may include hydrophilic paper. The hydrophilic paper may be surface modified to increase hygroscopicity. The hydrophilic paper may be uncoated paper, on which no separate coating is performed. The hydrophilic paper may be a wrinkled packaging piece.

[0099] The hydrophilic paper according to the embodiment can be manufactured by sequentially performing the following processes: a pulp manufacturing process in which logs are cut and shredded, cooked and cleaned; a raw material manufacturing process in which pulp is mixed with water, and auxiliary raw materials and chemicals are added to the mixture and mixed with the mixture; and a post-processing process in which the raw materials are made into wet pulp, which is compressed, dehydrated and dried to be manufactured into a finished product. That is, the hydrophilic paper according to the embodiment can be made of paper manufactured by a papermaking machine according to a known method without a separate coating process, that is, without a varnishing process.

[0100] The hydrophilic paper according to the embodiment may have a thickness ranging from 40 g / m 2 Up to 80g / m 2 The hydrophilic paper may be made of base paper without any coating and may have a relatively low basis weight and a small thickness.

[0101] Alternatively, the contact angle of the hydrophilic paper according to the embodiment can be 25° or less. The contact angle is the angle formed by the following two joints when there is a droplet on the solid: the joint between the liquid and the gas, and the joint between the liquid and the solid, and the contact angle can indicate the wettability level on the solid surface. Generally, when the contact angle of water on the solid surface is greater than 90°, the solid surface can be considered to be hydrophobic, and when the contact angle is less than 90°, the solid surface can be considered to be hydrophilic.

[0102] Alternatively, the hydrophilic paper according to the embodiment may have a thickness in the range of 40 g / m 2 Up to 80g / m 2and a contact angle of 25° or less, which indicates high hydrophilicity.

[0103] Since the third sheet material 223 includes hydrophilic paper, the third sheet material 223 can effectively absorb moisture in the mainstream smoke, thereby effectively cooling the aerosol.

[0104] In another embodiment, the third sheet 223 may provide relatively high rigidity by coating the surface forming the first airflow channel 220a and increase hygroscopicity by not coating the surface forming the second airflow channel 220b. The coating process may include a plastic material, specifically PLA.

[0105] See also Figure 5b , the first airflow channel 220a is formed between the ridges of the corrugated folds of the first sheet 221 and the third sheet 223, and the second airflow channel 220b is formed between the valleys of the corrugated folds of the second sheet 222 and the third sheet 223. In addition, the third airflow channel 220c is formed inside the second sheet 222. The airflow channel may refer to a path along which the aerosol generated from the tobacco rod 210 moves in the downstream direction when the user inhales through the mouthpiece 230.

[0106] In more detail, Figure 6a The air flow movement in the first air flow channel in the cooling section according to the embodiment is schematically shown.

[0107] Figure 6a An enlarged paper tube of the cooling section 220 is shown according to an embodiment. Figure 6a The airflow movement between the first sheet 221 and the third sheet 223 is schematically shown. Figure 6a , the first sheet 221 and the second sheet 222 are omitted to show the first air flow channel 220a formed between the first sheet 221 and the third sheet 223 in more detail. Figure 6a As air flows through the air flow channel 220a, the cooling effect on the aerosol can be improved.

[0108] The first sheet material 221 may form the outer surface of the first airflow channel 220a by surrounding the outer surface of the third sheet material 223. The first sheet material 221 may be porous. External air enters through the air gaps in the first sheet material 221, thereby improving the cooling effect on the aerosol.

[0109] Figure 6b An enlarged paper tube of the cooling section 220 is shown according to an embodiment. Figure 6b The airflow movement between the second sheet 222 and the third sheet 223 is schematically shown. Figure 6b, the first sheet 221 and the second sheet 222 may be omitted to show the second air flow channel 220b formed between the second sheet 222 and the third sheet 223 in more detail. Figure 6b As the air flows through the second air flow channel 220b, the cooling effect on the aerosol can be improved. The second sheet material 222 can form the outer surface of the second air flow channel 220b by surrounding the inner surface of the third sheet material 223.

[0110] Figure 6c The movement of airflow in the third airflow channel in the cooling section according to an embodiment is schematically shown. The airflow can move through the third airflow channel 220c formed inside the second sheet 222. The second sheet 222 can make the shape of the internal airflow channel smooth by packaging the wrinkled third sheet 223, so that the aerosol can be easily moved. In addition, as the second sheet 222 is packaged, the support of the aerosol generating article 2 can be improved, so that the cutting process can be easily performed.

[0111] Figure 7 is a diagram for explaining in detail a corrugated portion in a third sheet in a cooling section according to an embodiment.

[0112] Figure 7 An enlarged paper tube of the cooling section 220 is shown. As described above, the third sheet 223 may be corrugated between the first sheet 221 and the second sheet 222 to form a corrugated portion. The corrugated corrugated portion of the third sheet 223 may include a ridge portion and a valley portion.

[0113] The ridge portion may contact the first sheet 221. In this case, the distance d between one ridge portion and another ridge portion may be between 2 mm and 3 mm. In addition, the valley portion of the wrinkled pleat portion of the third sheet 223 may contact the second sheet 222. In this case, the distance h between one valley portion and another valley portion may be between 1 mm and 3 mm.

[0114] In an embodiment, when the third sheet 223 includes PLA, the distance h between each valley may be between 2 mm and 3 mm.

[0115] In another embodiment, when the third sheet material 223 includes hydrophilic paper, the distance h between the valley-shaped portions may be between 1 mm and 1.5 mm. When the third sheet material 223 includes hydrophilic paper, the third sheet material 223 has a lower basis weight, and therefore, the distance h between the valley-shaped portions may be relatively narrow. Since the distance h between the valley-shaped portions is narrow, the dehumidification effect may be improved.

[0116] Figure 7Regularly shaped corrugations are shown, but the corrugations may also be irregularly shaped, ie the distance d between the ridges or the distance h between the valleys may not be uniform but have various values.

[0117] Embodiments measure moisture content and temperature of mainstream smoke according to paper tube type of cooling section

[0118] Cigarettes were manufactured by changing different types of paper tubes of the cooling section, and the moisture content and temperature of the mainstream smoke were measured.

[0119] According to Embodiment 1, a cooling section using a paper tube having a corrugated structure between a first sheet and a second sheet is used, wherein the cooling section has hollow holes therein and includes a basis weight of 140 g / m 2 The first sheet has a basis weight of 60 g / m 2 The second sheet has a basis weight of 120 g / m 2 The third sheet of PLA film paper.

[0120] The difference between Embodiment 2 and Embodiment 1 is only in the composition of the third sheet material, and Embodiment 2 adopts a cooling section with a paper tube, wherein the cooling section includes a third sheet material having a basis weight of 40 g / m 2 The third sheet is made of hydrophilic paper, and the third sheet is wrinkled between the first sheet and the second sheet.

[0121] Comparative Example 1 shows the use of a commercially available cooling section including a tubular cellulose acetate having a hollow hole inside, and Comparative Example 2 shows the use of a cooling section having a hollow hole inside the cooling section and including a paper tube having a three-layer laminated section in which three sheets (the inner sheet 60 g / m 2 , Middle sheet 140g / m 2 , outer sheet 140g / m 2 ) are bonded to each other.

[0122]

Table 1

[0123] Water content (mg / root) Temperature(℃) Comparative Example 1 20.1 62.3 Comparative Example 2 24 64.87 Implementation Method 1 21.4 60.8 Implementation Method 2 18.3 61.6

[0124] The experimental results show that the cooling section using the structure including the paper tube according to the embodiment has good cooling and dehumidification effects as a whole. In particular, in the case of Embodiment 1 using the PLA film as the third sheet material, the cooling effect on the mainstream smoke is the greatest, and in the case of Embodiment 2 using the hydrophilic paper as the third sheet material, the cooling effect on the mainstream smoke is excellent and dehumidification is effective.

[0125] The description of the above embodiments is only an example, and it will be understood by those skilled in the art that various changes and equivalents of the embodiments can be realized. Therefore, the scope of the present invention should be defined by the appended claims, and all differences within the scope equivalent to the scope described in the claims should be understood to be included in the protection scope defined by the claims.

Claims

1. An aerosol-generating article, comprising: Tobacco rods containing tobacco material; a cooling section located downstream of the tobacco rod; as well as a mouthpiece located downstream of the cooling section, Wherein, the cooling section includes: a first sheet, which forms at least a portion of the outer surface of the cooling section; a second sheet, which forms a path inside the cooling section for the aerosol to move through along the length direction of the aerosol generating article; and a third sheet, which is wrinkled between the first sheet and the second sheet.

2. An aerosol-generating article according to claim 1, wherein The first sheet has a thickness in the range of 120 g / m 2 Up to 160g / m 2 A basis weight and a thickness ranging from 180 μm to 200 μm, and The second sheet has a thickness in the range of 50 g / m 2 Up to 70g / m 2 The basis weight is 200 μm and the thickness is in the range of 70 μm to 90 μm.

3. The aerosol-generating article of claim 1 , wherein: The third sheet material includes polylactic acid, and the third sheet material has a thickness in the range of 120 g / m 2 Up to 140g / m 2 The basis weight is 150 μm to 190 μm.

4. The aerosol-generating article of claim 1 , wherein: The third sheet material includes hydrophilic paper.

5. An aerosol-generating article according to claim 4, wherein The hydrophilic paper has a range of 40 g / m 2 Up to 80g / m 2 The basis weight is 200 μm and the thickness is in the range of 60 μm to 80 μm.

6. An aerosol-generating article according to claim 4, wherein The contact angle of the hydrophilic paper is 25° or less.

7. The aerosol-generating article of claim 1, wherein: The wrinkled folds of the third sheet material include a plurality of ridges and a plurality of valleys, The plurality of ridges contact the first sheet, and The distance between the plurality of ridges is between 2 mm and 3 mm.

8. The aerosol-generating article of claim 1, wherein: The wrinkled folds of the third sheet material include a plurality of ridges and a plurality of valleys, The plurality of valleys contact the second sheet, and The distance between the plurality of valley-shaped portions is between 1 mm and 3 mm.

9. An aerosol-generating article according to claim 1, further comprising a support section located at the downstream end of the tobacco rod.

10. An aerosol-generating article according to claim 1, further comprising an outer wrapper configured to package the tobacco rod, the cooling section and the mouthpiece.

11. A cooling section included in an aerosol-generating article, the cooling section comprising: a first sheet material forming at least a portion of an outer surface of the cooling section; a second sheet material, the second sheet material forming a path within the cooling section for the aerosol to move through along the length direction of the aerosol-generating article; and a third sheet that is corrugated between the first sheet and the second sheet.

12. The cooling section according to claim 11, wherein: The first sheet has a thickness in the range of 120 g / m 2 Up to 160g / m 2 The basis weight and thickness in the range of 180 μm to 200 μm, and the second sheet has a thickness in the range of 50 g / m 2 Up to 70g / m 2 The basis weight is 200 μm and the thickness is in the range of 70 μm to 90 μm.

13. The cooling section according to claim 11, wherein: The third sheet material includes polylactic acid, and the third sheet material has a thickness in the range of 120 g / m 2 Up to 140g / m 2 The basis weight is 150 μm to 190 μm.

14. The cooling section according to claim 11, wherein: The third sheet material includes hydrophilic paper.

15. The cooling section according to claim 14, wherein: The hydrophilic paper has a range of 40 g / m 2 Up to 80g / m 2 The basis weight is 200 μm and the thickness is in the range of 60 μm to 80 μm.

16. The cooling section according to claim 14, wherein: The contact angle of the hydrophilic paper is 25° or less.

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