Low-flammability aerosol-generating items

Abstract

An aerosol-generating article with low ignition properties is provided, and the aerosol-generating article according to some embodiments of the present disclosure is for use with an aerosol generating device and includes an aerosol-forming substrate portion, a filter portion, and a wrapper made of a flame-retardant paper material covering at least a portion of the aerosol-forming substrate portion, and the flame-retardant paper material can improve smoking safety for the user by reducing the possibility of the wrapper igniting due to abnormally high temperatures during smoking, and can also prevent the user from having an unintended smoking experience by reducing the possibility of the aerosol-generating article igniting due to the user's act of ignition.

Description

[Technical Field]

[0001] The present invention relates to a low ignition aerosol-generating article, and more particularly to a heated aerosol-generating article for use with an aerosol generating device, which is designed to have low ignition potential. [Background technology]

[0002] Traditional cigarettes have been combustion-type cigarettes, but recently, there has been an increasing demand for alternatives that overcome the shortcomings of combustion-type cigarettes. For example, there has been an increasing demand for devices that generate aerosols through electrical heating and heated cigarettes to be used therewith, and as a result, research into heated cigarettes has been actively conducted.

[0003] Similar to combustion cigarettes, heated cigarettes are also wrapped in a paper wrapper. However, typical paper wrappers can ignite due to excessive heat when electrically heated, raising concerns about smoking safety. Furthermore, due to the similar appearance of the two cigarettes, users may attempt to smoke a heated cigarette by lighting it. In this case, if a fire occurs at the end of the heated cigarette, the user may have an unintended smoking experience. Summary of the Invention [Problem to be solved by the invention]

[0004] The technical problem to be solved through some embodiments of the present disclosure is to provide a heated aerosol-generating article with low ignition potential to improve smoking safety for users.

[0005] Another technical problem that some embodiments of the present disclosure aim to solve is to provide a heated aerosol-generating article with low ignition potential in order to reduce the possibility of ignition due to a user's ignition attempt.

[0006] The technical problems of the present disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by a person of ordinary skill in the technical field of the present disclosure from the following description. [Means for solving the problem]

[0007] In order to solve the above technical problem, the aerosol-generating article according to some embodiments of the present disclosure is an aerosol-generating article to be used with an aerosol-generating device, and also includes an aerosol-forming substrate portion, a filter portion, and a wrapper made of a flame-retardant paper material that covers at least a portion of the aerosol-forming substrate portion. [Effects of the Invention]

[0008] Some embodiments of the present disclosure may provide a heated aerosol-generating article including a wrapper made of a flame-retardant paper material. The flame-retardant paper material can improve smoking safety for users by reducing the possibility of the wrapper igniting due to abnormally high temperatures during smoking, and can also prevent users from having an unintended smoking experience by reducing the possibility of the aerosol-generating article igniting due to a user's attempt to light the article.

[0009] Furthermore, by using a flame-retardant paper material with appropriate physical properties as the wrapper, the workability of the article manufacturing process can be ensured and the ignition potential of the aerosol-generating article can be further reduced. For example, 2 or 48g / m 2 By using a flame-retardant paper material having a basis weight of about 100 μm and a thickness of about 50 μm to 60 μm as the wrapper, the workability of the article manufacturing process can be ensured and the ignition potential of the aerosol-generating article can be further reduced.

[0010] The effects of the technical idea of ​​the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. [Brief explanation of the drawings]

[0011] [Figure 1] 1A-1C are exemplary diagrams illustrating an aerosol-generating article according to some embodiments of the present disclosure. [Figure 2] 1A-1C are exemplary diagrams illustrating an aerosol-generating article according to some embodiments of the present disclosure. [Figure 3] 10A to 10C are exemplary diagrams for explaining aerosol-generating articles according to some other embodiments of the present disclosure. [Figure 4] 10A to 10C are exemplary diagrams for explaining aerosol-generating articles according to some other embodiments of the present disclosure. [Figure 5] 10A to 10C are exemplary diagrams illustrating aerosol-generating articles according to still other embodiments of the present disclosure. [Figure 6] 1A to 1C are diagrams illustrating various types of aerosol generating devices to which aerosol-generating articles according to various embodiments of the present disclosure can be applied. [Figure 7] 1A to 1C are diagrams illustrating various types of aerosol generating devices to which aerosol-generating articles according to various embodiments of the present disclosure can be applied. [Figure 8] 1A to 1C are diagrams illustrating various types of aerosol generating devices to which aerosol-generating articles according to various embodiments of the present disclosure can be applied. DETAILED DESCRIPTION OF THE INVENTION

[0012] The aerosol-generating article according to some embodiments of the present disclosure is an aerosol-generating article for use with an aerosol-generating device, and also includes an aerosol-forming substrate portion, a filter portion, and a wrapper made of a flame-retardant paper material that covers at least a portion of the aerosol-forming substrate portion.

[0013] In one embodiment, the flame retardant paper material has a basis weight of 38 g / m 2 or 48g / m 2 It is also.

[0014] In one embodiment, the thickness of the flame retardant paper material is also between 50 μm and 60 μm.

[0015] In one embodiment, the tensile strength of the flame retardant paper material is also 35N / 15mm to 45N / 15mm.

[0016] In one embodiment, the elongation of the flame retardant paper material is 2% to 4%.

[0017] In one embodiment, the whiteness of the flame retardant paper material is 80% to 90%.

[0018] In one embodiment, the air permeability of the flame retardant paper material is between 2 CU and 10 CU.

[0019] In one embodiment, the container further includes an outer wrapper surrounding the wrapper, at least a portion of which is also made of a flame-retardant paper material.

[0020] In one embodiment, the flame-retardant paper stock is a paper stock coated with a flame-retardant coating composition, and the coating composition also includes at least one substance selected from the group consisting of phosphoric acid, magnesium hydroxide, and aluminum hydroxide, and at least one substance selected from the group consisting of distilled water and alcohol.

[0021] Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The advantages, features, and methods of achieving the same of the present disclosure will become clearer with reference to the following detailed embodiments along with the accompanying drawings. However, the technical idea of ​​the present disclosure is not limited to the following embodiments, and may be embodied in various different forms. However, the following embodiments are provided to fully grasp the technical idea of ​​the present disclosure and to fully inform those skilled in the art of the present disclosure of the scope of the present disclosure, and the technical idea of ​​the present disclosure is defined only by the scope of the claims.

[0022] When adding reference numerals to components in each drawing, it should be noted that the same components are assigned the same numerals as much as possible, even if they are displayed in different drawings. Furthermore, in describing various embodiments of the present disclosure, if it is determined that a detailed description of related known structures or functions may obscure the gist of the present disclosure, the detailed description will be omitted.

[0023] Unless otherwise defined, all terms (including technical and scientific terms) used in this disclosure may be used in a manner commonly understood by a person of ordinary skill in the art to which this disclosure belongs. Furthermore, commonly used, pre-defined terms should not be interpreted as ideal or excessive unless expressly and specifically defined. The terms used in this disclosure are intended to describe the embodiments and do not limit the technical scope of this disclosure. In this disclosure, the singular form also includes the plural form unless otherwise specified.

[0024] Furthermore, when describing components of the present disclosure, terms such as first, second, A, B, (a), and (b) may be used. Such terms are intended only to distinguish the component from other components, and do not limit the nature, order, or sequence of the components. When a component is described as being "coupled," "coupled," or "connected" to another component, it should be understood that the component may be directly coupled or connected to the other component, but that there may also be other components "coupled," "coupled," or "connected" between the components.

[0025] As used in this disclosure, "comprises" and / or "comprising" does not exclude the presence or addition of one or more other components, steps, operations and / or elements to a stated component, step, operation and / or element.

[0026] First, some terminology used in the various embodiments of this disclosure will be clarified.

[0027] In the following examples, "aerosol-forming substrate" may refer to a substance capable of forming an aerosol. The aerosol may also include a volatile compound. The aerosol-forming substrate may be solid or liquid.

[0028] For example, solid aerosol-forming substrates may include solid substances based on tobacco raw materials such as flat tobacco, shredded tobacco, and reconstituted tobacco, while liquid aerosol-forming substrates may include liquid compositions based on nicotine, tobacco extract, and / or various flavoring agents. However, the scope of the present disclosure is not limited to the foregoing examples.

[0029] In the following examples, "aerosol-generating device" refers to a device that generates an aerosol using an aerosol-forming substrate to generate an aerosol that can be inhaled directly into the user's lungs through the user's mouth. For examples of some aerosol-generating devices, see Figures 6 to 8.

[0030] In the following examples, the term "aerosol-generating article" may refer to an article capable of generating an aerosol. The aerosol-generating article also includes an aerosol-forming substrate. A representative example of the aerosol-generating article is a cigarette, but the scope of the present disclosure is not limited thereto.

[0031] In the following examples, "upstream" or "upstream direction" may refer to a direction away from the user's mouth, and "downstream" or "downstream direction" may refer to a direction closer to the user's mouth. The terms upstream and downstream may be used to describe the relative positions of elements constituting the aerosol-generating article. For example, in the aerosol-generating article 300 illustrated in FIG. 1 , the filter unit 320 is located downstream or downstream of the aerosol-forming substrate unit 310, and the aerosol-forming substrate unit 310 is located upstream or upstream of the filter unit 320.

[0032] In the following examples, "longitudinal direction" may mean the direction corresponding to the longitudinal axis of the aerosol-generating article.

[0033] In the following examples, "puff" refers to a user's inhalation, which may refer to a situation in which the liquid is drawn into the user's oral cavity, nasal cavity, or lungs through the user's mouth or nose.

[0034] Various embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings.

[0035] FIG. 1 is an exemplary diagram illustrating an aerosol-generating article 300 according to some embodiments of the present disclosure.

[0036] 1, the aerosol-generating article 300 is an article that generates an aerosol by being heated, for example, as an article used together with the aerosol-generating device 1000 (FIGS. 6 to 8). For example, the aerosol-generating article 300 is an article that is inserted into the aerosol-generating device 1000 (FIGS. 6 to 8) and electrically heated by a heating element provided in the device, thereby generating an aerosol.

[0037] As shown in Fig. 1, the aerosol-generating article 300 according to this embodiment also includes a filter unit 320, an aerosol-forming substrate unit 310, and a wrapper 330. However, Fig. 1 only illustrates components relevant to the embodiment of the present disclosure. Therefore, a person skilled in the art to which the present disclosure pertains would know that the aerosol-generating article may further include other general components in addition to the components illustrated in Fig. 1. Each component of the aerosol-generating article 300 will be described below.

[0038] The filter unit 320 can filter the aerosol formed in the aerosol-forming substrate unit 310. To this end, the filter unit 320 also includes a filter material. Examples of the filter material include cellulose acetate fiber and paper, but the scope of the present disclosure is not limited thereto. The filter unit 320 also includes a wrapper 333 that encases the filter material.

[0039] The filter unit 320 is located downstream of the aerosol-forming substrate unit 310 and is also connected to the downstream end of the aerosol-forming substrate unit 310. For example, the filter unit 320 and the aerosol-forming substrate unit 310 have a cylindrical (rod) shape, are aligned in the longitudinal direction, and are also connected by a tipping wrapper. The tipping wrapper can wrap at least a portion of the filter unit 320 and at least a portion of the aerosol-forming substrate unit 310 together, connecting the filter unit 320 and the aerosol-forming substrate unit 310. When the filter unit 320 forms the downstream end of the aerosol-generating article 300, the filter unit 320 can also function as a mouthpiece that comes into contact with the user's mouth.

[0040] The filter unit 320 is manufactured in a rod shape, and may be referred to as a "filter rod 320" in some cases. The filter unit 320 may be manufactured in various shapes, such as a cylindrical shape, a tube shape having a hollow inside, or a recessed shape.

[0041] The filter section 320 may have a single-segment structure as illustrated in Figure 1, or may have a multi-segment structure, as illustrated in Figures 3 to 5.

[0042] Next, the aerosol-forming substrate unit 310 can perform the function of forming an aerosol. For example, the aerosol-forming substrate unit 310 can form an aerosol by being electrically heated, and therefore also includes an aerosol-forming substrate. The aerosol-forming substrate unit 310 also includes a wrapper 331 that encases the aerosol-forming substrate.

[0043] The aerosol-forming substrate may include, for example, tobacco material. Examples of the tobacco material include tobacco leaf sections, tobacco stems, and materials processed therefrom. More specific examples of the tobacco material include ground tobacco leaf, ground reconstituted tobacco, expanded shredded tobacco, expanded midrib, and tabular tobacco. The tobacco material may be in the form of, but is not limited to, shredded tobacco, tobacco particles, tobacco sheets, tobacco beads, tobacco granules, or tobacco extract.

[0044] In one embodiment, the aerosol-forming substrate further comprises additives such as humectants, flavoring agents, and / or organic acids. For example, the humectants may include at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. The humectants maintain an appropriate level of moisture within the tobacco material, resulting in a milder inherent flavor and a richer atomization rate. The flavoring agent may also include, for example, licorice, sucrose, fructose syrup, isosweet, 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, cinnamon, ylang-ylang, zalubia, spearmint, ginger, coriander, clove extract (or clove substance), or coffee.

[0045] The aerosol-forming substrate unit 310 is located upstream of the filter unit 320 and is also connected to the upstream end of the filter unit 320. Therefore, the aerosol formed in the aerosol-forming substrate unit 310 can be delivered to the user's mouth via the filter unit 320 by the puff.

[0046] The aerosol-forming substrate part 310 is also manufactured in a rod shape, and is therefore sometimes referred to as an "aerosol-forming rod 310."

[0047] Next, the wrapper 330 may refer to something that encases at least a portion of the aerosol-forming substrate portion 310 and / or the filter portion 320. The wrapper 330 may refer to the individual wrappers 331, 333 of the aerosol-forming substrate portion 310 and / or the filter portion 320, or may refer to the outer wrapper 335 that encases at least a portion of the individual wrappers 331, 333, like a tipping wrapper, or may collectively refer to all wrappers 331 to 335 used in the aerosol-generating article 300.

[0048] In this embodiment, at least a portion of the wrapper 330 is also manufactured from a flame-retardant paper material. The flame-retardant paper material described above improves smoking safety by reducing the possibility of the wrapper 330 igniting, and can prevent the user from having an unintended smoking experience. For example, the flame-retardant paper material described above can improve smoking safety by reducing the possibility of the wrapper 330 igniting due to abnormally high temperatures during smoking, and can prevent the user from having an unintended smoking experience by reducing the possibility of the aerosol-generating article 300 igniting due to the user's attempt to light it. However, the specific manufacturing method of the wrapper 330 varies depending on the embodiment.

[0049] 1, the wrapper 331 surrounding the aerosol-forming substrate 310 may be made of a flame-retardant paper material. Because the aerosol-forming substrate 310 is a location to which heat is concentrated (or a location where a user may inadvertently ignite), if the wrapper 331 is made of a flame-retardant paper material, smoking safety is greatly improved and the possibility of the aerosol-generating article 300 igniting due to an ignition attempt can be effectively reduced.

[0050] In another embodiment, the outer wrapper 335 may be made of a flame-retardant paper material, and in such a case, the above-mentioned advantages can be fully ensured.

[0051] In yet another embodiment, as shown in Figure 2, not only the wrapper 331 but also the outer wrapper 335 may be made of a flame-retardant paper material. In such a case, the ignition potential of the aerosol-generating article 300 may be further reduced, thereby more fully ensuring the above-mentioned advantages.

[0052] In yet another embodiment, only the upstream end portion of the wrapper 331 is made of a flame-retardant paper material. Since the upstream end portion of the aerosol-generating article 300 is a location where a user may inadvertently ignite it, the aforementioned advantages can be fully ensured even if only this portion is made of a flame-retardant paper material.

[0053] In yet another embodiment, the wrapper 333 that encases the filter portion 320 may also be made of a flame-retardant paper material.

[0054] In yet another embodiment, an additional wrapper (not shown) made of a thermally conductive material (e.g., a metal foil such as aluminum foil) may be disposed near the aerosol-forming substrate portion 330. The thermally conductive material may dissipate heat by conduction, further reducing the ignition potential of the aerosol-generating article 300.

[0055] In yet another embodiment, the wrapper 330 may be manufactured using multiple paper materials with different flame retardancies. For example, the wrapper 331 surrounding the aerosol-forming substrate 310 may be made of a paper material that is more flame retardant than the wrapper 333 of the filter 320 or the outer wrapper 335. Alternatively, the outer wrapper 335 may be made of the most flame retardant paper material. Alternatively, the upstream end region of the wrapper 331 may be made of a paper material that is more flame retardant than the other regions. The degree of flame retardancy may be adjusted, for example, by using the amount, type, or concentration of the flame retardant material, but the scope of the present disclosure is not limited thereto.

[0056] In still other embodiments, the wrapper 330 may be fabricated based on various combinations of the above-described embodiments.

[0057] In addition, the physical properties of the flame-retardant paper material are closely related to not only the ignition properties of the aerosol-generating article 300, but also the aesthetic appearance, the workability of the article manufacturing process, and the ease of manufacturing the paper material, so it is desirable that the flame-retardant paper material be manufactured so that it has appropriate physical properties.

[0058] In one embodiment, the flame retardant paper material has a basis weight of about 30 g / m 2 or 60g / m 2 and preferably about 35 g / m 2 or 55g / m 2 , about 40g / m 2 or 55g / m 2 , about 40g / m 2 or 50g / m 2 , about 38g / m 2 or 48g / m 2 , about 38g / m 2 or 45g / m 2 , or approximately 40 g / m 2 or 45g / m 2 It has been confirmed that within such a numerical range, the operability of the article manufacturing process is ensured and the ignition potential of the aerosol-generating article 300 is further reduced. In this example, the basis weight of the flame-retardant paper material was also measured in accordance with ISO 536.

[0059] In one embodiment, the thickness of the flame-retardant paper material is about 45 μm to 75 μm, and preferably about 50 μm to 70 μm, about 50 μm to 65 μm, about 50 μm to 60 μm, about 45 μm to 65 μm, about 45 μm to 60 μm, about 52 μm to 58 μm, or about 55 μm to 58 μm. It has been confirmed that within such numerical ranges, the operability of the article manufacturing process is ensured and the ignition potential of the aerosol-generating article 300 is further reduced. In this embodiment, the thickness of the flame-retardant paper material is also measured in accordance with ISO 534.

[0060] In one embodiment, the tensile strength of the flame-retardant paper material is about 25 N / 15 mm to 55 N / 15 mm, preferably about 30 N / 15 mm to 50 N / 15 mm, about 30 N / 15 mm to 45 N / 15 mm, about 35 N / 15 mm to 50 N / 15 mm, about 35 N / 15 mm to 45 N / 15 mm, or about 38 N / 15 mm to 42 N / 15 mm. It has been confirmed that within such numerical ranges, the operability of the article manufacturing process is ensured and the ignition potential of the aerosol-generating article 300 is further reduced. In this embodiment, the tensile strength of the flame-retardant paper material is also measured in accordance with ISO 1924-2.

[0061] In one embodiment, the elongation rate (i.e., elongation rate at break) of the flame-retardant paper material is about 1% to 10%, and preferably about 1% to 8%, about 1% to 6%, about 1% to 4%, about 2% to 8%, about 2% to 6%, about 2% to 4%, or about 2% to 3%. It has been confirmed that within such ranges, the operability of the article manufacturing process is ensured and the ignition potential of the aerosol-generating article 300 is further reduced. In this embodiment, the elongation rate of the flame-retardant paper material is measured in accordance with ISO 1924-2.

[0062] In one embodiment, the whiteness of the flame-retardant paper material is about 70% or more, preferably about 70% to 95%, about 75% to 95%, about 80% to 90%, or about 85% to 90%. It has been confirmed that the aesthetic appearance of the aerosol-generating article 300 is ensured within such numerical ranges. In this embodiment, the whiteness of the flame-retardant paper material is also measured in accordance with ISO 2470.

[0063] In one embodiment, the air permeability of the flame-retardant paper material is about 1 CU to 20 CU, preferably about 1 CU to 15 CU, about 2 CU to 15 CU, about 2 CU to 10 CU, about 2 CU to 8 CU, about 2 CU to 6 CU, or about 3 CU to 5 CU. It has been confirmed that the ignition potential of the aerosol-generating article 300 is further reduced within such numerical ranges. In this embodiment, the air permeability of the flame-retardant paper material is also measured in accordance with ISO 2965:2019.

[0064] Flame-retardant paper stock can be manufactured by applying a flame-retardant coating composition to the paper stock. Specifically, the coating composition can be applied to a portion or all of the paper stock. Alternatively, the coating composition can be applied to one side, the opposite side, or both sides of the paper stock. Alternatively, the coating composition can be applied to the paper stock at regular intervals (e.g., the coating composition can be applied in the machine (longitudinal) direction or the crosswise direction, but at intervals). The application intervals can be the same or different (e.g., the intervals can be gradually increased or decreased). The coating thickness can also be the same or different.

[0065] The specific components and composition ratios of the flame-retardant coating composition may vary.

[0066] For example, the flame-retardant coating composition may include at least one substance selected from the group consisting of phosphoric acid (H3PO4), magnesium hydrate, and aluminum hydrate. The magnesium hydrate may be, for example, magnesium hydroxide (Mg(OH)2), but the scope of the present disclosure is not limited thereto. The aluminum hydrate may be, for example, aluminum hydroxide (Al(OH3)), but the scope of the present disclosure is not limited thereto. Since the exemplified substances have flame retardancy, when such substances are appropriately blended, a high-performance flame-retardant coating composition can be formed.

[0067] For example, the flame-retardant coating composition may also include at least one material selected from the group consisting of distilled water and alcohol. The exemplified material can be mixed with the flame-retardant solute to form a coating composition that can be easily and homogeneously applied to paper substrates.

[0068] Above, with reference to FIGS. 1 and 2 , an aerosol-generating article 300 according to some embodiments of the present disclosure has been described. Based on the foregoing, a heated aerosol-generating article 300 can be provided, including a wrapper 330 made of a flame-retardant paper material. The flame-retardant paper material can improve smoking safety for users by reducing the possibility of the wrapper 330 igniting due to abnormally high temperatures during smoking. By reducing the possibility of the aerosol-generating article 300 igniting due to a user's attempt to light it, it can also prevent users from having an unintended smoking experience. Furthermore, by using a flame-retardant paper material with appropriate physical properties for the wrapper 330, workability in the article manufacturing process can be ensured and the ignition potential of the aerosol-generating article 300 can be further reduced. For example, a flame-retardant paper material having a flame-retardant property of approximately 38 g / m can be used as the wrapper 330. 2 or 48g / m 2 By utilizing a flame-retardant paper material having a basis weight of about 100 μm and a thickness of about 50 μm to 60 μm as the wrapper 330, the workability of the article manufacturing process can be ensured and the ignition potential of the aerosol-generating article 300 can be further reduced.

[0069] 3 and 4, aerosol-generating articles 100 according to other embodiments of the present disclosure will be described below, although for clarity of the present disclosure, descriptions of content that overlaps with the previous embodiments will be omitted.

[0070] FIG. 3 is an exemplary diagram illustrating an aerosol-generating article 100 according to some other embodiments of the present disclosure.

[0071] As shown in Fig. 3, the aerosol-generating article 100 according to this embodiment includes a filter portion 120, an aerosol-forming substrate portion 110, and a wrapper 140, and the filter portion 120 may have a multi-segment structure. However, Fig. 3 only illustrates components relevant to the embodiment of the present disclosure. Therefore, a person skilled in the art to which the present disclosure pertains would know that the aerosol-generating article 100 may further include other general components in addition to the components illustrated in Fig. 3.

[0072] The filter unit 120 may be configured by a first segment 121 and a second segment 123. It goes without saying that the filter unit 120 may further include a third segment (not shown).

[0073] The first segment 121 can perform a cooling function for the aerosol generated in the aerosol-forming substrate portion 110. Therefore, the first segment 121 may also be referred to as a "cooling segment 121" in some cases.

[0074] The first segment 121 may be manufactured in various shapes. For example, the first segment 121 may be a paper tube having a cylindrical shape and a hollow space formed therein. For another example, the first segment 121 may be made of a polymeric material or a biodegradable polymeric material. For example, the first segment 121 may be made of polylactic acid (PLA) fiber, but is not limited thereto. For another example, the first segment 121 may be made of a cellulose acetate filter having a plurality of holes. For still another example, the first segment 121 may be a tube filter having a hollow space. For example, the first segment 121 may be a cellulose acetate filter having a hollow space. However, the first segment 121 is not limited thereto, and may be manufactured in shapes other than those illustrated as long as it can perform a cooling function.

[0075] Second segment 123 can then perform a filtering function on the aerosol that has passed through first segment 121. Therefore, second segment 123 may also be referred to as "filter segment 123" in some cases. Alternatively, second segment 123 may also be referred to as "mouthpiece segment 123" even though it is located in the mouthpiece region.

[0076] The second segment 123 also includes a filter material to perform a filtering function, such as cellulose acetate fibers, paper, etc., but the scope of the present disclosure is not limited thereto.

[0077] In one embodiment, as shown, the second segment 123 also includes at least one capsule 130. The capsule 130 can perform a function of generating a flavor or a function of generating an aerosol. For example, the capsule 130 has a structure in which a liquid containing a flavoring agent is enclosed by a coating. The capsule 130 can have a spherical or cylindrical shape, but is not limited thereto.

[0078] Next, the aerosol-forming substrate 110 can perform the function of forming an aerosol. The aerosol-forming substrate 110 corresponds to the aerosol-forming substrate 310 described above, and therefore further description thereof will be omitted.

[0079] Next, the wrapper 140 may refer to something that encases at least a portion of the aerosol-forming substrate portion 110 and / or the filter portion 120. The wrapper 140 may refer to the individual wrappers 141 to 145 of the aerosol-forming substrate portion 110 and / or the filter portion 120, may refer to the outer wrapper 147 that encases at least a portion of the individual wrappers 141 to 145, or may collectively refer to all wrappers 141 to 147 used in the aerosol-generating article 100.

[0080] At least a portion of the wrapper 140 may be made of a fire-retardant paper material. The wrapper 140 corresponds to the wrapper 330 described above, and therefore further description thereof will be omitted.

[0081] In one embodiment, as shown in FIG. 4, the aerosol-generating article 100 further includes a front-end plug 150 disposed at the upstream end. The front-end plug 150 can prevent the aerosol-forming substrate 110 from detaching to the outside and can also prevent liquefied aerosol from flowing from the aerosol-forming substrate 110 into, for example, the aerosol generating device 1000 (FIGS. 6 to 8) during smoking. Alternatively, the front-end plug 150 can function to appropriately adjust the overall length of the aerosol-generating article 100. Alternatively, when the aerosol-generating article 100 is inserted into, for example, the aerosol generating device 1000 (FIGS. 6 to 8), the front-end plug 150 can adjust the aerosol-generating substrate 110 to be disposed at an appropriate position within the aerosol generating device. The front-end plug 150 can be made of, for example, cellulose acetate fiber, although the scope of the present disclosure is not limited thereto. If desired, the front end plug 150 may have at least one channel formed therein, the cross-sectional shape of which may be varied.

[0082] In the above-described embodiment, a flame-retardant substance may be added to the interior (e.g., added to the cellulose acetate fibers) or exterior (e.g., added to the wrapper 149) of the front end plug 150. Because the front end plug 150 is located at the upstream end where direct ignition by a user may occur, adding a flame-retardant substance may further reduce the possibility of the aerosol-generating article 100 igniting due to ignition. Alternatively, to achieve the same advantage, the wrapper 149 surrounding the front end plug 150 may be made of a flame-retardant paper material, or an additional wrapper (not shown) made of a thermally conductive material may be further disposed near the front end plug 150.

[0083] Above, an aerosol-generating article 100 according to some embodiments of the present disclosure has been described with reference to Figures 3 and 4. Below, an aerosol-generating article 200 according to some other embodiments of the present disclosure will be described with reference to Figure 5. However, for clarity of the present disclosure, descriptions of content that overlaps with the previous embodiments will be omitted.

[0084] FIG. 5 is an exemplary diagram illustrating an aerosol-generating article 200 according to still other embodiments of the present disclosure.

[0085] As shown in Figure 5, the aerosol-generating article 200 of this embodiment also includes an aerosol-forming substrate portion 210 and a filter portion 220, and each of the aerosol-forming substrate portion 210 and the filter portion 220 also includes a plurality of segments 211, 213, 221, and 223.

[0086] As shown in the figure, the aerosol-forming substrate part 210 may be composed of a first segment 211 and a second segment 213. Here, it goes without saying that the aerosol-forming substrate part 210 may further include a third segment (not shown).

[0087] The first segment 211 may also include a humectant. For example, the first segment 211 may include creped paper impregnated with a humectant. The humectant may include at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol.

[0088] The second segment 213 may also include a nicotine-generating substrate such as a tobacco substance. The nicotine-generating substrate may include, for example, cut tobacco, tobacco particles, tobacco sheets, tobacco beads, or tobacco granules. As another example, the nicotine-generating substrate may include crepe paper impregnated with a tobacco extract. When the nicotine-generating substrate is heated, nicotine is generated from the nicotine-generating substrate, and the nicotine may be transferred to the filter portion 220.

[0089] Next, the filter unit 220 also includes a plurality of segments 221 and 223. For example, the filter unit 220 may be configured with a third segment 221 that performs a cooling function and a fourth segment 223 that performs a filtering function. The above description of the filter unit 120 in FIG. 3 can be equally applied to the filter unit 220, so further description will be omitted.

[0090] Next, the wrapper 230 may correspond to the wrapper 140 described above, and therefore a description thereof will be omitted.

[0091] Aerosol-generating articles 100 to 300 according to various embodiments of the present disclosure have been described above with reference to Figures 1 to 5. Hereinafter, various types of aerosol-generating devices 1000 to which the above-described aerosol-generating articles 100 to 300 can be applied will be briefly described with reference to Figures 6 to 8.

[0092] 6 is an exemplary diagram schematically illustrating one type of aerosol-generating device 1000 to which the aerosol-generating articles 100 to 300 described above can be applied. In particular, the drawings from FIG. 6 onward illustrate an example in which an aerosol-generating article 2000 is housed within the device 1000, and the aerosol-generating article 2000 also corresponds to the aerosol-generating articles 100 to 300 described above.

[0093] As shown in Fig. 6, the aerosol generating device 1000 includes a housing, a heater unit 1300, a battery 1100, and a control unit 1200. However, it goes without saying that these are merely preferred embodiments for achieving the objectives of the present disclosure, and that some components may be added or omitted as necessary. Furthermore, each component of the aerosol generating device 1000 shown in Fig. 6 represents a functionally separated component, and in an actual physical environment, multiple components may be embodied in an integrated form, or a single component may be embodied in a form separated into multiple smaller functional components. Each component of the aerosol generating device 1000 will now be described.

[0094] The housing can form the exterior appearance of the aerosol generating device 1000. The housing can also form a storage space for storing the aerosol-generating article 2000. The housing is preferably made of a sturdy material to protect the internal components.

[0095] Next, the heater unit 1300 may be arranged to heat the aerosol-generating article 2000 accommodated in the accommodation space. The aerosol-generating article 2000 may generate aerosol by being heated, and the generated aerosol may be inhaled through the user's mouth. The operation, heating temperature, etc. of the heater unit 1300 may be controlled by the control unit 1200. The heater unit 1300 may include an internal heating element (see FIG. 6) or an external heating element (see FIGS. 7 and 8). Alternatively, the heater unit 1300 may include both an internal heating element and an external heating element.

[0096] Next, the battery 1100 can supply the power used to operate the aerosol generating device 1000. For example, the battery 1100 can supply power to the heater unit 1300 to heat the aerosol-forming substrate included in the aerosol-generating article 2000, and can also supply the power necessary for the control unit 1200 to operate.

[0097] The battery 1100 can also supply the power necessary to operate electrical components such as a display (not shown), a sensor (not shown), and a motor (not shown) provided in the aerosol generating device 1000.

[0098] Next, the control unit 1200 can generally control the operation of the aerosol generating device 1000. For example, the control unit 1200 can control the operation of the heater unit 1300 and the battery 1100, and can also control the operation of other components included in the aerosol generating device 1000. The control unit 1200 can control the power supplied by the battery 1100, the heating temperature of the heater unit 1300, etc. The control unit 1200 can also check the status of each component of the aerosol generating device 1000 and determine whether the aerosol generating device 1000 is in an operable state.

[0099] The control unit 1200 may be implemented by at least one processor. The processor may also be implemented by an array of multiple logic gates, or by a combination of a general-purpose microprocessor and a memory storing a program executable by the microprocessor. Those skilled in the art will readily understand that the control unit 1200 may also be implemented by other forms of hardware.

[0100] Another type of aerosol generating device 1000 will be briefly described below with reference to FIGS.

[0101] Figure 7 illustrates an aerosol generating device 1000 in which a vaporizer 1400 and an aerosol-generating article 2000 are arranged in parallel, and Figure 8 illustrates an aerosol generating device 1000 in which a vaporizer 1400 and an aerosol-generating article 2000 are arranged in series. However, the internal structure of the aerosol generating device is not limited to that illustrated in Figures 7 and 8, and the arrangement of the components may be changed depending on the design method.

[0102] 7 and 8, the vaporizer 1400 includes a liquid storage tank for storing a liquid aerosol-forming substrate, a wick for absorbing the aerosol-forming substrate, and a vaporizer element for vaporizing the absorbed aerosol-forming substrate to generate an aerosol. The vaporizer element may be embodied in various forms, such as a heating element or a vibration element. In some cases, the vaporizer 1400 may be designed without a wick.

[0103] The aerosol generated by the vaporizer 1400 passes through the aerosol-generating article 2000 and can be inhaled through the user's mouth. The vaporization element of the vaporizer 1400 can also be controlled by the control unit 1200.

[0104] Various types of aerosol generating devices 1000 to which the aerosol-generating articles 100 to 300 according to various embodiments of the present disclosure can be applied have been briefly described above with reference to FIGS.

[0105] The following provides a more detailed explanation of the configuration and effects of the aerosol-generating article (e.g., aerosol-generating article 100) through examples and comparative examples. However, the following examples are merely illustrative of a variety of aerosol-generating articles that can be implemented through the present disclosure, and the scope of the present disclosure is not limited to the following examples.

[0106] Example 1

[0107] A heated cigarette was manufactured having the same structure as the aerosol-generating article 100 illustrated in Fig. 4. Specifically, the heated cigarette was manufactured using a flame-retardant paper material having the physical properties shown in Table 1 below as a wrapper (e.g., wrapper 141) of an aerosol-forming substrate (e.g., aerosol-forming substrate 110).

[0108] [Table 1]

[0109] Example 2

[0110] A heat-not-burn cigarette identical to that of Example 1 was manufactured, except that a flame-retardant paper material having the physical properties shown in Table 1 was used as an outer wrapper (e.g., outer wrapper 147).

[0111] Example 3

[0112] A heat-not-burn cigarette identical to that of Example 1 was manufactured, except that a flame-retardant paper material having the physical properties listed in Table 1 was used as the wrapper (e.g., wrapper 141) and outer wrapper (e.g., outer wrapper 147) of the aerosol-forming substrate (e.g., aerosol-forming substrate 110).

[0113] Example 4

[0114] Basis weight: approximately 38 g / m 2 A heated cigarette identical to that of Example 1 was manufactured, except that a flame-retardant paper material having a tensile strength of about 28 N / 15 mm and a thickness of about 45 μm was used.

[0115] Comparative Example 1

[0116] A heated cigarette identical to that in Example 1 was manufactured, except that the paper wrapper material of a commercially available heated cigarette was used as is.

[0117] Table 2 below summarizes the main components of the heated cigarettes according to Examples 1 to 4 and Comparative Example 1.

[0118] [Table 2]

[0119] Experimental example 1: Ignition evaluation

[0120] Experiments were conducted to evaluate the ignition properties of heated cigarettes according to Examples 1 to 5 and Comparative Example 1. Specifically, the front-end plugs (e.g., front-end plug 150) of the manufactured heated cigarettes were cut, and the aerosol-forming substrate was directly ignited with a combustible heat source under HC (Health Canada) smoking conditions. Puffs were then taken, and the time point at which each heated cigarette self-extinguished was measured. The mainstream smoke inhalation volume per puff was set to approximately 55 mL, the puff time was approximately 2 seconds, and the puff interval was approximately 30 seconds. Each heated cigarette was repeatedly tested 10 times, with eight puffs per session. The experimental results are shown in Tables 3 and 4 below. For reference, in Table 3 below, the time point at which the heated cigarette self-extinguished is "3 puffs," meaning that the heated cigarette self-extinguished before the third puff after the second puff. In addition, the digestion rate in Table 4 was calculated based on the experimental results shown in Table 3, and the digestion rate of "100% before 5 puffs" means that in all experiments, the heated cigarette was digested before the 5th puff.

[0121] [Table 3]

[0122] [Table 4]

[0123] Referring to Tables 3 and 4 above, it can be seen that the self-extinguishing rates of the heated cigarettes according to Examples 1 to 4 are far superior to those of Comparative Example 1. This shows that the wrapper made of a flame-retardant paper material can significantly reduce the ignition potential of an aerosol-generating article. It can also be seen that the self-extinguishing time of the heated cigarette according to Example 3 is generally earlier than that of Example 1. This means that when a flame-retardant paper material is applied in a double (or multiple) manner, the ignition potential of an aerosol-generating article can be further reduced.

[0124] It can also be seen that the self-extinguishing rate of the heated cigarette according to Example 1 is superior to that of Example 4. Specifically, based on 3 puffs, the self-extinguishing rate of Example 1 is approximately 60%, while the self-extinguishing rate of Example 4 is only approximately 10%. This means that the physical properties of the paper material (e.g., basis weight, thickness, tensile strength) affect the ignition potential of the aerosol-generating article, and therefore, in order to sufficiently reduce the ignition potential of the aerosol-generating article, a basis weight of approximately 32 g / m2 is required. 2 From the above, it can be seen that it is desirable to use a flame-retardant paper material with a tensile strength of about 28 N / 15 mm or more and a thickness of about 45 μm or more as the wrapper.

[0125] Furthermore, although not shown in Tables 3 and 4, when manufacturing the heated cigarette according to Example 4, the workability of the manufacturing process was significantly reduced due to durability issues of the material. As a result, in terms of workability of the manufacturing process, the basis weight was about 32 g / m 2 From the above, it can be seen that it is desirable to use a flame-retardant paper material with a tensile strength of approximately 28 N / 15 mm or more and a thickness of approximately 45 μm or more as a wrapper.

[0126] The configuration and effects of the aerosol-generating article (for example, aerosol-generating article 100) have been described in further detail above through examples and comparative examples.

[0127] Although the embodiments of the present disclosure have been described above with reference to the accompanying drawings, those skilled in the art will understand that the present disclosure may be embodied in other specific forms without changing the technical spirit or essential features thereof. Therefore, the above-described embodiments should be understood to be illustrative in all respects and not limiting. The scope of protection of the present disclosure should be interpreted by the claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of rights of the technical ideas defined by the present disclosure.

Claims

1. An aerosol-generating article for use with an aerosol-generating device, an aerosol-forming substrate; A filter unit; a first wrapper made of a flame-retardant paper material that encloses at least a portion of the aerosol-forming substrate; a second wrapper that is separate from the first wrapper and that encloses at least a portion of the filter portion; The first wrapper is made of a paper material having a higher flame retardancy than the second wrapper, An aerosol-generating article, wherein an upstream end region of the first wrapper is made of a paper material that is more flame-retardant than other regions of the first wrapper.

2. 2. The aerosol-generating article of claim 1, wherein the flame-retardant paper material has a basis weight of 38 g / m2 to 48 g / m2.

3. 2. The aerosol-generating article according to claim 1, wherein the flame-retardant paper material has a thickness of 50 μm to 60 μm.

4. 2. The aerosol-generating article according to claim 1, wherein the flame-retardant paper material has a tensile strength of 35 N / 15 mm to 45 N / 15 mm.

5. 2. The aerosol-generating article according to claim 1, wherein the flame-retardant paper material has an elongation ratio of 2% to 4%.

6. 2. The aerosol-generating article according to claim 1, wherein the flame-retardant paper material has a whiteness of 80% to 90%.

7. 2. The aerosol-generating article of claim 1, wherein the flame-retardant paper material has an air permeability of 2 CU to 10 CU.

8. further comprising an outer wrapper surrounding the first wrapper and the second wrapper; 10. The aerosol-generating article of claim 1, wherein at least a portion of the outer wrapper is also made of a flame-retardant paper material.

9. The flame-retardant paper material is a paper material coated with a flame-retardant coating composition, 2. The aerosol-generating article of claim 1, wherein the coating composition comprises at least one material selected from the group consisting of phosphoric acid, magnesium hydroxide, and aluminum hydroxide, and at least one material selected from the group consisting of distilled water and alcohol.

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