CN117177674A

CN117177674A - Low flammability aerosol-generating articles

Info

Publication number: CN117177674A
Application number: CN202280028411.4A
Authority: CN
Inventors: 朴昌镇; 金守镐; 安基真; 郑奉洙; 黄珉姬
Original assignee: KT&G Corp
Current assignee: KT&G Corp
Priority date: 2021-04-14
Filing date: 2022-04-14
Publication date: 2023-12-05

Abstract

A low flammability aerosol-generating article is provided. An aerosol-generating article according to some embodiments of the present disclosure for use with an aerosol-generating device may comprise: an aerosol-forming substrate portion; a filtering part; and a wrapper of a flame retardant paper material surrounding at least a portion of the aerosol-forming substrate portion. The flame retardant paper material can improve the smoking safety of a user by reducing the possibility of the ignition of the wrapping paper caused by abnormally high temperature during smoking, and can prevent unexpected smoking experience of the user in advance by reducing the possibility of the ignition of the aerosol-generating article caused by the ignition action of the user.

Description

Low flammability aerosol-generating articles

Technical Field

The present disclosure relates to a low-flammability aerosol-generating article, and more particularly, to an aerosol-generating article designed to have low flammability as a heated aerosol-generating article for use with an aerosol-generating device.

Background

The morphology of traditional cigarettes is burn, but in recent years there has been an increasing demand for alternative articles that overcome the disadvantages of burn cigarettes. For example, devices for generating aerosols by electric heating and heated cigarettes used therewith are increasingly in demand, and thus research into heated cigarettes is actively underway.

On the other hand, similar to combustion cigarettes, heating cigarettes are also wrapped with paper material wrapper (wrapper). However, even in the case of electric heating, the wrapping paper of the general paper material may catch fire due to abnormally high temperature, so that smoking safety problems may be raised. Moreover, due to the similarity of the appearance of the two cigarettes, a user can also attempt to smoke the heated cigarettes through the ignition action. In this case, if the end of the heated cigarette fires, the user may have an unintended smoking experience.

Disclosure of Invention

Technical problem to be solved

A technical problem to be solved by some embodiments of the present disclosure is to provide a heated aerosol-generating article with low flammability to improve the smoking safety of a user.

Another technical problem to be solved by some embodiments of the present disclosure is to provide a heated aerosol-generating article having low flammability to reduce the likelihood of fire due to ignition action by a user.

The technical problems of the present disclosure are not limited to the above-described technical problems, and other technical problems not mentioned can be clearly understood by those skilled in the art from the following description.

Means for solving the problems

According to an aerosol-generating article of some embodiments of the present disclosure for solving the technical problem, as an aerosol-generating article for use with an aerosol-generating device, may comprise: an aerosol-forming substrate portion; a filtering part; and a wrapper of flame retardant paper material surrounding at least a portion of the aerosol-forming substrate portion.

Effects of the invention

According to some embodiments of the present disclosure, a heated aerosol-generating article may be provided that includes a wrapper of flame retardant paper material. The flame retardant paper material can improve the smoking safety of a user by reducing the possibility of the ignition of the wrapping paper caused by abnormally high temperature during smoking, and can prevent unexpected smoking experience of the user in advance by reducing the possibility of the ignition of the aerosol-generating article caused by the ignition action of the user.

In addition, by using a flame retardant paper material having appropriate material properties as a wrapping paper, it is possible to ensure operability of the product manufacturing process and further reduce the flammability of the aerosol-generating product. For example, by using a material having a weight of about 38g/m ² To 48g/m ² As the wrapping paper, a flame retardant paper material of about 50 μm to 60 μm in thickness, whereby the operability of the article manufacturing process can be ensured and the combustibility of the aerosol-generating article can be further reduced.

The effects of the technical ideas of the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by the ordinary skilled person from the following description.

Drawings

Fig. 1 and 2 are schematic diagrams for illustrating aerosol-generating articles according to some embodiments of the present disclosure.

Fig. 3 and 4 are schematic diagrams for illustrating aerosol-generating articles according to some other embodiments of the present disclosure.

Fig. 5 is a schematic diagram for illustrating an aerosol-generating article according to some other embodiments of the present disclosure.

Fig. 6-8 illustrate various types of aerosol-generating devices to which aerosol-generating articles according to various embodiments of the present disclosure may be applied.

Detailed Description

An aerosol-generating article according to some embodiments of the present disclosure, as an aerosol-generating article for use with an aerosol-generating device, may comprise: an aerosol-forming substrate portion; a filtering part; and a wrapper of flame retardant paper material surrounding at least a portion of the aerosol-forming substrate portion.

In one embodiment, the basis weight of the flame retardant paper material may be 38g/m ² To 48g/m ² 。

In one embodiment, the thickness of the flame retardant paper material may be 50 μm to 60 μm.

In one embodiment, the tensile strength of the flame retardant paper material may be 35N/15mm to 45N/15mm.

In one embodiment, the elongation of the flame retardant paper material may be 2% to 4%.

In one embodiment, the whiteness of the flame retardant paper material may be 80% to 90%.

In an embodiment, the air permeability of the flame retardant paper material may be 2CU to 10CU.

In an embodiment, the packaging paper further comprises an outer packaging paper wrapping the packaging paper, and at least one part of the outer packaging paper can be made of a flame-retardant paper material.

In an embodiment, the flame retardant paper material is a paper material coated with a flame retardant coating composition, which may include at least one selected from the group consisting of phosphoric acid, magnesium hydroxide, and aluminum hydroxide, and at least one selected from the group consisting of distilled water and ethanol.

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The advantages and features of the present disclosure and the methods of accomplishing the same may be apparent from the accompanying drawings and the examples described in detail below. However, the technical idea of the present disclosure is not limited to the embodiments described below, and may be implemented in various forms different from each other, and the present embodiment is only for enabling the present disclosure to be fully disclosed, so that a person having ordinary skill in the art to which the present disclosure pertains can fully understand the scope of the present disclosure, and the technical idea of the present disclosure is defined by the scope of the claims of the present disclosure.

When adding reference numerals to components of all figures, it should be noted that even though components are shown in different figures, the same reference numerals refer to the same components. In describing various embodiments of the present disclosure, it is assumed that detailed descriptions of the structures and functions of the related known technologies will obscure the gist of the present disclosure, and detailed descriptions thereof will be omitted.

Unless otherwise defined, all terms (including technical and scientific terms) used in this disclosure can be used in the sense of commonly understood by one of ordinary skill in the art to which this disclosure belongs. Also, unless specifically defined otherwise, the commonly used predefined terms should not be interpreted as idealized or overly formal. The terminology used in the present disclosure is for the purpose of illustrating the embodiments only and is not intended to limit the technical scope of the present disclosure. In this disclosure, unless otherwise indicated, singular-expressed nouns also include plural expressions.

In addition, in describing the constituent elements of the present disclosure, terms such as first, second, A, B, (a), (b), and the like may be used. These terms are only used to distinguish one component from another, and the nature, order, sequence, etc. of the relevant components are not limited by the terms. It will be understood that if an element is referred to as being "connected," "coupled," or "linked" to another element, it can be taken to mean that the element is not only directly connected, "" coupled, "or" linked "to the other element, but also indirectly connected," "coupled," or "linked" via a third element.

The terms "comprises" and/or "comprising" when used in this disclosure specify the presence of stated features, steps, operations, and/or elements, but do not preclude the presence or addition of one or more other features, steps, operations, and/or elements.

First, some terms used in various embodiments of the present disclosure will be explained.

In the following examples, an "aerosol-forming substrate" may refer to a material capable of forming an aerosol (aerosol). The aerosol may comprise volatile compounds. The aerosol-forming substrate may be solid or liquid.

For example, the solid aerosol-forming substrate may comprise a solid material based on a tobacco raw material, e.g., reconstituted tobacco, cut filler, reconstituted tobacco, etc., and the liquid aerosol-forming substrate may comprise a liquid composition based on nicotine, tobacco extract, and/or various flavoring agents. However, the scope of the present disclosure is not limited to the examples listed above.

In the following embodiments, an "aerosol-generating device" may refer to a device that generates an aerosol using an aerosol-forming substrate in order to generate an aerosol that may be inhaled directly into a user's lungs through the user's mouth. With respect to some examples of aerosol-generating devices, reference may be made to fig. 6 to 8.

In the following examples, "aerosol-generating article" may refer to an article capable of generating an aerosol. The aerosol-generating article may comprise an aerosol-forming substrate. As a representative example of an aerosol-generating article, a cigarette may be exemplified, but the scope of the disclosure is not limited to this example.

In the following embodiments, "upstream" or "upstream direction" refers to a direction away from the user's mouth, and "downstream" or "downstream direction" refers to a direction closer to the user's mouth. The terms "upstream" and "downstream" may be used to describe the relative positions of the elements making up the aerosol-generating article. For example, in the aerosol-generating article 300 illustrated in fig. 1, the filter portion 320 is located downstream or in a downstream direction of the aerosol-forming substrate portion 310, and the aerosol-forming substrate portion 310 is located upstream or in an upstream direction of the filter portion 320.

In the following examples, "length direction (longitudinal direction)" may refer to a direction corresponding to a length direction axis of an aerosol-generating article.

In the following embodiments, "aspiration" refers to inhalation (inhalation) of a user, which refers to a condition of inhaling into the oral cavity, nasal cavity, or lung of the user through the mouth or nose of the user.

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

Fig. 1 is a schematic diagram illustrating an aerosol-generating article 300 according to some embodiments of the present disclosure.

Referring to fig. 1, an aerosol-generating article 300 is an article for use with an aerosol-generating device (e.g., 1000 of fig. 6-8), and may be an article that generates an aerosol upon heating. For example, the aerosol-generating article 300 may be an article of manufacture such as: which is inserted into an aerosol-generating device (e.g., 1000 of fig. 6-8) and is electrically heated by a heating element disposed in the device to generate an aerosol.

As shown in fig. 1, an aerosol-generating article 300 according to the present embodiment may include a filter portion 320, an aerosol-forming substrate portion 310, and a wrapper 330. However, fig. 1 only illustrates components relevant to embodiments of the present disclosure. Accordingly, those of ordinary skill in the art to which the present disclosure pertains will appreciate that other general structural elements may be included in addition to the components shown in FIG. 1. The components of the aerosol-generating article 300 will be described below.

The filtering part 320 may perform a function of filtering the aerosol formed in the aerosol-forming substrate part 310. To this end, the filtering part 320 may include a filtering (filtering) material. Examples of the filter material may include cellulose acetate fiber, paper, etc., but the scope of the present disclosure is not limited thereto. The filter portion 320 may also include a wrapper 333 that wraps around the filter material.

The filter portion 320 may be located downstream of the aerosol-forming substrate portion 310 and may be connected to a downstream end of the aerosol-forming substrate portion 310. For example, the filter portion 320 and the aerosol-forming substrate portion 310 have a cylindrical (rod) shape, are aligned in the longitudinal axis direction, and are connected by tipping wrapper (tipping wrapper). The tipping wrapper may connect the filter portion 320 and the aerosol-forming substrate portion 310 by wrapping together at least a portion of the filter portion 320 and at least a portion of the aerosol-forming substrate portion 310. The filter portion 320 may also serve as a mouthpiece for contact with the mouth of a user when the filter portion 320 forms the downstream end of the aerosol-generating article 300.

Since the filter part 320 is also made into a rod shape, it may be referred to as a "filter rod 320" according to circumstances, and may be made into various shapes such as a cylindrical shape, a tubular shape including a hollow inside, a concave shape, and the like.

As illustrated in fig. 1, the filtering part 320 may be made of a single-stage structure or a multi-stage structure. With respect to the multi-stage structure, reference is made to fig. 3 to 5.

Next, the aerosol-forming substrate portion 310 may perform the function of forming an aerosol. For example, an aerosol may be formed by heating the aerosol-forming substrate portion 310, for which purpose an aerosol-forming substrate may be included. The aerosol-forming substrate portion 310 may further comprise a wrapper 331 surrounding the aerosol-forming substrate.

The aerosol-forming substrate may comprise, for example, a tobacco material. For example, the tobacco material may include tobacco lamina, tobacco stem, or materials processed therefrom, and the like. As more specific examples, the tobacco material may include crushed tobacco leaves, crushed reconstituted tobacco, cut filler tobacco, cut expanded stems, reconstituted tobacco and the like. However, the present invention is not limited thereto. The tobacco material may be in the form of tobacco shreds, tobacco particles (tobacco), tobacco flakes (sheets), tobacco beads (beads), tobacco particles (grains), or tobacco extracts, but is not limited thereto.

In one embodiment, the aerosol-forming substrate may further comprise additional substances such as humectants (moisturizers), fragrances, and/or organic acids (organic acids). For example, the humectant may include at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. The humectant can maintain moisture in tobacco material at proper level, soften inherent taste, and enrich atomization amount. In addition, for example, the flavoring agent may include licorice, sucrose, fructose syrup, isosaccharide (isosweet), cocoa, lavender, cinnamon, cardamom, celery, fenugreek, bitter tree (cascarilla), sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, peppermint oil, cinnamon, caraway, cognac, jasmine, chamomile, menthol, cinnamon, ylang-ylang, red sage, spearmint, ginger, coriander, clove extract (or clove substance), or coffee, and the like.

The aerosol-forming substrate portion 310 may be located upstream of the filter portion 320 to connect with an upstream end of the filter portion 320. Thus, the aerosol formed by the aerosol-forming substrate portion 310 may be transferred to the mouth of the user by suction through the filter portion 320.

Since the aerosol-forming substrate portion 310 is made into a rod shape, it may be referred to as an "aerosol-forming rod 310" as the case may be.

In addition, the wrapper 330 may refer to a member that wraps around 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 110 and/or the filter portion 130, or may refer to the outer wrapper 335, such as a tipping wrapper, that wraps around at least a portion of the individual wrappers 331, 333, or may refer to the collective term of all wrappers 331-335 used with the aerosol-generating article 300.

In this embodiment, at least a portion of the wrapper 330 may be made of a flame retardant paper material. The flame retardant paper material may improve smoking safety by reducing the likelihood of the wrapper 330 firing, and may pre-prevent the user from having an unintended smoking experience. For example, the flame retardant paper material may improve smoking safety by reducing the likelihood of the wrapper 330 firing due to abnormally high temperatures during smoking, and may also pre-prevent a user from having an unintended smoking experience by reducing the likelihood of the aerosol-generating article 300 firing due to the user's ignition event. It should be noted that the specific manufacturing manner of the wrapping paper 330 may be different according to embodiments.

In some embodiments, as shown in fig. 1, the wrapper 331 surrounding the aerosol-forming substrate portion 310 may be made of a flame retardant paper material. Since the aerosol-forming substrate portion 310 is a portion where heating is concentrated (or a portion where ignition occurs due to carelessness of a user), when the wrapping paper 331 is made of a flame-retardant paper material, the smoking safety can be greatly improved while the possibility of ignition of the aerosol-generating article 300 caused by the ignition can be effectively reduced.

In another embodiment, the outer wrapper 335 may be made of a flame retardant paper material. In this case, the above advantages can be sufficiently ensured.

Or in yet another embodiment, as shown in fig. 2, not only the wrapper 331 but also the outer wrapper 335 may be made of a flame retardant paper material. In this case, the ignitability of the aerosol-generating article 300 is further reduced, so that the above-described advantages can be more sufficiently ensured.

In yet another embodiment, only the upstream end portion of the wrapper 331 may be made of a flame retardant paper material. Since the upstream end portion of the aerosol-generating article 300 is a portion where a direct ignition action can occur due to carelessness of a user, the above-described advantages can be sufficiently ensured even if only the portion is made of a flame-retardant paper material.

In yet another embodiment, the wrapper 333 surrounding the filter portion 320 may also be made of a flame retardant paper material.

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 further disposed adjacent to the aerosol-forming substrate portion 330. The thermally conductive material may further reduce the flammability of the aerosol-generating article 300 by conductively dispersing heat.

In yet another embodiment, the wrapper 330 may be manufactured from a plurality of paper materials having different flame retardancy. For example, the wrapping paper 331 wrapping the aerosol-forming substrate portion 310 may be made of a paper material having higher flame retardancy than the wrapping paper 333 or the outer wrapping paper 335 of the filter portion 320. 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 having a higher flame retardancy than other regions. For example, the degree of flame retardancy may be adjusted using the amount, weight, concentration, etc. of the flame retardant substance, but the scope of the present disclosure is not limited thereto.

In yet another embodiment, the wrapper 330 may be manufactured based on various combinations of the above embodiments.

On the other hand, the physical properties of the flame-retardant paper material are closely related not only to the combustibility of the aerosol-generating article 300, but also to the aesthetic appearance, the operability of the article manufacturing process, the ease of manufacturing the paper material, and the like, and therefore the flame-retardant paper material is preferably manufactured to have an appropriate physical property value.

In one embodiment, the amount of flame retardant paper material may be about 30g/m ² To 60g/m ² May preferably be about 35g/m ² To 55g/m ² About 40g/m ² To 55g/m ² About 40g/m ² To 50g/m ² About 38g/m ² To 48g/m ² About 38g/m ² To 45g/m ² Or 40g/m ² To 45g/m ² . It has been confirmed that within such a numerical range, operability of the article manufacturing process is ensured, and the combustibility of the aerosol-generating article 300 is further reduced. In this example, the quantification of the flame retardant paper material can be determined based on ISO 536.

In one embodiment, the thickness of the flame retardant paper material may be about 45 μm to 75 μm, and may preferably be 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 a numerical range, operability of the article manufacturing process is ensured, and the combustibility of the aerosol-generating article 300 is further reduced. In this example, the thickness of the flame retardant paper material may be determined based on ISO 534.

In one embodiment, the tensile strength of the flame retardant paper material may be about 25N/15mm to 55N/15mm, and may preferably be about 30N/15mm to 50N/15mm, about 30N/15mm to 45N/15mm, about 35N/15mm to 50N/15mm, about 35/15mm to 45N/15mm, or about 38N/15mm to 42N/15mm. It has been confirmed that within such a numerical range, operability of the article manufacturing process is ensured, and the combustibility of the aerosol-generating article 300 is further reduced. In this example, the tensile strength of the flame retardant paper material may be determined based on ISO 1924-2.

In an embodiment, the elongation (i.e., elongation at break) of the flame retardant paper material may be about 1% to 10%, and may preferably be 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 a numerical range, operability of the article manufacturing process is ensured, and the combustibility of the aerosol-generating article 300 is further reduced. In this example, the elongation of the flame retardant paper material can be determined based on ISO 1924-2.

In an embodiment, the whiteness of the flame retardant paper material may be about 70%, and may preferably be about 70% to 95%, about 75% to 95%, about 80% to 90%, or about 85% to 90%. It has been confirmed that within this numerical range, the external appearance of the aerosol-generating article 300 is ensured. In this example, the whiteness of the flame retardant paper material can be measured based on ISO 2470.

In an embodiment, the air permeability (air permeability) of the flame retardant paper material may be about 1CU to 20CU, and may preferably be about 1CU to 15CU, about 2CU to 10CU, about 2CU to 8CU, about 2CU to 6CU, or about 3CU to 5CU. It has been confirmed that within this range of values, the flammability of the aerosol-generating article 300 is further reduced. In this example, the air permeability of the flame retardant paper material can be determined based on ISO 2965:2019.

For example, a flame retardant paper material may be manufactured by coating a flame retardant coating composition on the paper material. As a specific example, the coating composition may be coated on a portion or all of the paper material. Alternatively, the coating composition may be applied to one, the other or both sides of the paper material. Alternatively, the coating compositions may be applied to the paper material at predetermined intervals (e.g., the coating compositions are applied longitudinally (length) or transversely, while being applied at intervals). At this time, the coating intervals may be the same or may be different from each other (for example, in the form of gradually increasing or decreasing intervals). In addition, the coating thicknesses may be the same or different from each other.

The specific constituent materials and compositional proportions of the flame retardant coating composition can vary.

For example, the flame retardant coating composition may comprise a material selected from the group consisting of phosphoric acid (H ₃ PO ₄ ) At least one of the group consisting of magnesium hydrate and aluminum hydrate. For example, the magnesium hydrate may be magnesium hydroxide (Mg (OH) ₂ ) The scope of the present disclosure is not limited in this regard. In addition, for example, the aluminum hydrate may be aluminum hydroxide (AL (OH) ₃ ) But the scope of the present disclosure is not limited thereto. Since the exemplified substances have flame retardancy, when these substances are properly combined, a high-performance flame-retardant coating composition can be formed.

In addition, for example, the flame retardant coating composition may include at least one selected from the group consisting of distilled water and ethanol. The exemplified substances are well mixed with the above-mentioned flame retardant solutes, whereby a coating composition which is homogeneous and can be easily applied to paper materials can be formed.

Thus far, an aerosol-generating article 300 according to some embodiments of the present disclosure has been described with reference to fig. 1-2. As described above, a heated aerosol-generating article 300 may be provided, the heated aerosol-generating article 300 comprising a wrapper 330 of flame retardant paper material. The flame retardant paper material may improve the smoking safety of the user by reducing the likelihood of the wrapper 330 firing due to abnormally high temperatures during smoking, and may also pre-prevent the user from having an unintended smoking experience by reducing the likelihood of the aerosol-generating article 300 firing due to the user's ignition event. In addition, by using a flame retardant paper material having appropriate material properties as the wrapping paper 330, it is possible to ensure operability of the article manufacturing process and further reduce the combustibility of the aerosol-generating article 300. For example, by using a material having a weight of about 38g/m ² To 48g/m ² As the wrapping paper 330, a flame retardant paper material of about 50 μm to 60 μm in thickness, whereby the operability of the article manufacturing process can be ensured and the combustibility of the aerosol-generating article 300 can be further reducedSex.

Hereinafter, an aerosol-generating device 100 according to some other embodiments of the present disclosure will be described with reference to fig. 3 to 4. However, for the sake of clarity of the present disclosure, description of the contents repeated with the foregoing embodiments will be omitted.

Fig. 3 is a schematic diagram illustrating an aerosol-generating article 100 according to other some embodiments of the present disclosure.

As shown in fig. 3, the aerosol-generating article 100 according to the present embodiment may include a filter portion 120, an aerosol-forming substrate portion 110, and a wrapper 140, and the filter portion 120 may be constructed of a multi-stage structure. It should be noted that fig. 3 only shows components related to the embodiments of the present disclosure. Accordingly, those of ordinary skill in the art to which the present disclosure pertains will appreciate that other general structural elements may be included in addition to the components shown in FIG. 3.

The filtering portion 120 may be composed of a first section 121 and a second section 123. Of course, the filtering portion 120 may further include a third section (not shown).

The first section 121 may perform a cooling function for the aerosol formed in the aerosol-forming substrate portion 110. Therefore, the first section 121 may also be referred to as a "cooling section 121" as appropriate.

The first segment 121 may be manufactured in various shapes. As one example, the first segment 121 may be a paper tube formed of paper material and including a hollow cylindrical shape. As another example, the first segment 121 may be made of a polymeric material or a biodegradable polymeric material. For example, the first section 121 may be made of polylactic acid (PLA) fiber, but is not limited thereto. As yet another example, the first section 121 may be made of a cellulose acetate filter having a plurality of holes. As yet another example, the first section 121 may be a tube filter that includes a hollow. For example, the first section 121 may be a cellulose acetate filter that includes a hollow. However, the present disclosure is not limited thereto, and the first section 121 may be manufactured in a shape different from the illustrated shape as long as the cooling function can be performed.

In addition, the second section 123 may perform a filtering function for aerosols passing through the first section 121. Thus, the second section 123 may also be referred to as a "filter section 123" as appropriate. Alternatively, the second segment 123 is located at the mouth portion and thus may also be referred to as a "mouth segment 123".

The second section 123 may include a filtering (filtering) material to perform a filtering function. Examples of the filter material may include cellulose acetate fiber, paper, etc., but the scope of the present disclosure is not limited thereto.

In an embodiment, as shown, the second segment 123 may include at least one capsule 130. Here, the capsule 130 can perform a function of generating a fragrance, and can also perform a function of generating an aerosol. For example, the capsule 130 may be a structure in which a liquid containing a perfume is enclosed with a film. In addition, the capsule 130 may have a spherical or cylindrical shape, but is not limited thereto.

Next, the aerosol-forming substrate portion 110 may perform the function of forming an aerosol. The aerosol-forming substrate portion 110 may correspond to the aerosol-forming substrate portion 310 described above, and thus a further description thereof will be omitted.

In addition, the wrapper 140 may refer to a member that wraps around 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 141-145 of the aerosol-forming substrate portion 110 and/or the filter portion 130, or may refer to the outer wrapper 147 wrapping at least a portion of the individual wrappers 141-145, or may refer to the collective term for all wrappers 141-147 used with the aerosol-generating article 100.

At least a portion of the wrapper 140 may be made of a flame retardant paper material. The wrapper 140 may correspond to the wrapper 330 described above, and thus a further description thereof will be omitted.

On the other hand, in an embodiment, as shown in fig. 4, the aerosol-generating article 100 may further comprise a front end insert 150 disposed at the upstream end. The front end insert 150 may prevent the aerosol-forming substrate portion 110 from being detached to the outside, and may prevent liquefied aerosol from flowing from the aerosol-forming substrate portion 110 to the aerosol-generating device (e.g., 1000 of fig. 6-8) during smoking. Alternatively, the front end insert 150 may also perform the function of properly adjusting the overall length of the aerosol-generating article 100. Alternatively, when the aerosol-generating article 100 is inserted into an aerosol-generating device (e.g., 1000 of fig. 6-8), the front-end insert 150 may also perform the function of adjustment such that the aerosol-forming substrate portion 110 is disposed in place inside the aerosol-generating device. For example, the front end insert 150 may be manufactured from cellulose acetate, although the scope of the present disclosure is not limited in this respect. At least one channel may be formed in the front end insert 150, and the cross-section of the channel may be manufactured in various shapes, as desired.

In the above embodiments, the flame retardant substance may be added either internally (e.g., to cellulose acetate) or externally (e.g., to the wrapper 149) to the front end insert 150. Since the front end insert 150 is located at the upstream end portion where the ignition operation directly occurs due to carelessness of the user, when a flame-retardant substance is added, the possibility of ignition of the aerosol-generating article 100 caused by the ignition operation can be further reduced. Alternatively, to achieve the same advantages, a wrapper 149 wrapping the front end insert 150 may be made of a flame retardant paper material, or an additional wrapper (not shown) made of a thermally conductive material may also be disposed adjacent the front end insert 150.

Thus far, an aerosol-generating article 100 according to some embodiments of the present disclosure has been described with reference to fig. 3 to 4. Hereinafter, an aerosol-generating article 200 according to some other embodiments of the present disclosure will be described with reference to fig. 5. However, for the sake of clarity of the present disclosure, description of the contents repeated with the foregoing embodiments will be omitted.

Fig. 5 is a schematic diagram for illustrating an aerosol-generating article 200 according to some other embodiments of the present disclosure.

As shown in fig. 5, the aerosol-generating article 200 according to the present embodiment may comprise an aerosol-forming substrate portion 210 and a filter portion 220, and the aerosol-forming substrate portion 210 and the filter portion 220 may comprise a plurality of segments 211, 213, 221, 223, respectively.

As shown, the aerosol-forming substrate portion 210 may be comprised of a first segment 121 and a second segment 123. Of course, the aerosol-forming substrate portion 210 may also include a third segment (not shown).

The first section 211 may comprise a humectant. For example, the first section 211 may comprise a rolled paper impregnated with a humectant. For example, the humectant may include at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol.

Second, the second segment 213 may comprise a nicotine-producing substrate such as a tobacco substance. For example, the nicotine-producing matrix may comprise tobacco shreds, tobacco particles, tobacco flakes, tobacco beads, tobacco particles. As another example, the nicotine generating substrate may also comprise crimped paper of an emergency tobacco extract. When the nicotine generating substrate is heated, nicotine is generated from the nicotine generating substrate and can be transferred to the filter portion 220.

Second, the filtering portion 220 may include a plurality of segments 221, 223. For example, the filtering part 220 may be composed of a third section 221 performing a cooling function and a fourth section 223 performing a filtering function. The contents regarding the filtering part 120 of fig. 3 described above may be equally applied to the filtering part 220, and thus a further description thereof will be omitted.

Next, the wrapper 230 may correspond to the wrapper 140 described above. Therefore, the description thereof will be omitted.

To this end, aerosol-generating articles 100 to 300 according to various embodiments of the present disclosure have been described with reference to fig. 1 to 5. Hereinafter, various types of aerosol-generating devices 1000 to which the above-described aerosol-generating articles 100 to 300 may be applied will be described with reference to fig. 6 to 8.

Fig. 6 is a schematic diagram schematically illustrating one type of aerosol-generating device 1000 to which the aerosol-generating articles 100 to 300 described above may be applied. In particular, the following figures of fig. 6 show a state in which the aerosol-generating article 2000 is housed in the device 1000 as an example, the aerosol-generating article 2000 may correspond to the aerosol-generating articles 100 to 300.

As shown in fig. 6, the aerosol-generating device 1000 may include a housing, a heater portion 1300, a battery 1100, and a control portion 1200. However, this is merely a preferred embodiment for achieving the objects of the present disclosure, and some components may be added or deleted as necessary, of course. In addition, each component of the aerosol-generating device 1000 as shown in fig. 6 represents a functional element that is functionally divided, and is implemented in a form in which a plurality of components are integrated with each other in an actual physical environment, or may be implemented in a form in which a single component is divided into a plurality of detailed functional elements. Next, the respective components of the aerosol-generating device 1000 will be described.

The housing may form the appearance of the aerosol-generating device 1000. Also, the housing may form a receiving space for receiving the aerosol-generating article 2000. Preferably, the housing is formed of a strong material capable of protecting the internal components.

In addition, the heater part 1300 may be provided to heat the aerosol-generating article 2000 accommodated in the accommodating space. The aerosol may be generated by heating the aerosol-generating article 2000, the generated aerosol being inhalable through the mouth of a user. The operation of the heater section 1300, the heating temperature, and the like can be controlled by the control section 1200. The heater section 1300 may be provided with an internal heating element (see fig. 6) and may also be provided with an external heating element (see fig. 7 and 8). Alternatively, the heater portion 1300 may also be provided with both internal and external heating elements.

In addition, the battery 1100 may supply power for operating the aerosol-generating device 1000. For example, the battery 1100 may supply electric power so that the heater section 1300 can heat the aerosol-forming substrate contained in the aerosol-generating article 2000, or may supply electric power necessary for the operation of the control section 1200.

The battery 1100 may supply electric power necessary for the operation of electric components such as a display (not shown), a sensor (not shown), and a motor (not shown) provided in the aerosol-generating device 1000.

In addition, the control section 1200 may control the overall operation of the aerosol-generating device 1000. For example, the control section 1200 may control the operations of the heater section 1300 and the battery 1100, and may also control the operations of other components included in the aerosol-generating device 1000. The control section 1200 may control the power supplied from the battery 1100, the heating temperature of the heater section 1300, and the like. In addition, the control section 1200 may determine whether the aerosol-generating device 1000 is in an operable state by confirming the state of each component of the aerosol-generating device 1000.

The control section 1200 may be implemented by at least one processor (processor). The processor may be implemented by a plurality of logic gate arrays, or by a combination of a general-purpose microprocessor and a memory storing a program executable by the microprocessor. It should be apparent to those skilled in the art to which the present disclosure pertains that the control unit 1200 may be implemented by other hardware.

Hereinafter, other types of aerosol-generating devices 1000 will be briefly described with reference to fig. 7 to 8.

Fig. 7 illustrates an aerosol-generating device 1000 in which the vaporizer 1400 and the aerosol-generating article 2000 are arranged side by side, and fig. 8 illustrates an aerosol-generating device 1000 in which the vaporizer 1400 and the aerosol-generating article 2000 are arranged in a row. However, the internal structure of the aerosol-generating device is not limited to the structure illustrated in fig. 7 and 8, and the arrangement of components may be changed according to the design method.

In fig. 7 and 8, the vaporizer 1400 may include: a liquid storage chamber for storing a liquid aerosol-forming substrate; a wick (wick) for absorbing the aerosol-forming substrate; and a vaporization element for vaporizing the absorbed aerosol-forming substrate to generate an aerosol. The vaporizing element may be implemented in various forms, e.g., a heating element, a vibrating element, etc. Depending on the circumstances, vaporizer 1400 may also be designed with a structure that does not include a wick.

The aerosol generated by the vaporizer 1400 may pass through the aerosol-generating article 2000 and be inhaled through the mouth of the user. The vaporizing element of the vaporizer 1400 may be controlled by the control unit 1200.

Thus far, various types of aerosol-generating devices 1000 to which the aerosol-generating articles 100 to 300 according to various embodiments of the present disclosure may be applied have been schematically described with reference to fig. 6 to 8.

The structure and effects of the aerosol-generating article (e.g., 100) described above will be described in more detail below with reference to examples and comparative examples. However, the following embodiments are merely some examples of the various aerosol-generating articles that may be implemented by the present disclosure, and thus the scope of the present disclosure is not limited to these embodiments.

Example 1

A heated cigarette having the same structure as the aerosol-generating article 100 illustrated in fig. 4 was produced. Specifically, heated cigarettes were manufactured by using a flame retardant paper material having the physical property values described in table 1 below as a wrapper (e.g., 141) for an aerosol-forming substrate portion (e.g., 110).

TABLE 1

Differentiation (Unit)	Physical property value	Correlation standard
			Quantification (g/m) ² )	43.0	ISO 536
Tensile Strength (N/15 mm)	40.8	ISO 1924-2
			Elongation (%)	2.6	ISO 1924-2
Thickness (μm)	56.1	ISO 534
			Whiteness (%)	86.0	ISO 2470
Air permeability (CU)	4.1	ISO 2965:2019

Example 2

A heated cigarette was manufactured in the same manner as in example 1, except that a flame retardant paper material having the physical property values described in table 1 was used as an external wrapping paper (e.g., 147).

Example 3

A heated cigarette was manufactured in the same manner as in example 1 except that a flame retardant paper material having the physical property values described in table 1 was used as a wrapping paper (e.g., 141) and an external wrapping paper (e.g., 147) of the aerosol-forming substrate portion (e.g., 110).

Example 4

Except that a quantitative of about 38g/m was used ² A heated cigarette was produced in the same manner as in example 1, except that the flame-retardant paper material having a tensile strength of about 28N/15mm and a thickness of about 45 μm was used.

Comparative example 1

A heated cigarette was produced in the same manner as in example 1, except that a paper wrapper material for a commercially available heated cigarette was directly used.

Table 2 below summarizes the main structure of the heated cigarettes according to examples 1 to 4 and comparative example 1.

TABLE 2

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Experimental example 1: flammability assessment

Experiments were performed to evaluate the flammability of the heated cigarettes according to examples 1 to 5 and comparative example 1. Specifically, the front end insert (e.g., 150) of the manufactured heated cigarette is cut and the matrix portion is formed with a combustible heat source directly contacting the aerosol under canadian Health Care (HC) smoking conditions. Then a puff (smoking) is performed and the self-extinguishing time of each heated cigarette is measured. At this time, the amount of mainstream smoke inhaled per puff was set to about 55mL, the puff time was about 2 seconds, and the puff interval was about 30 seconds, and a total of 10 repeated experiments were performed on the basis of 8 puffs per heating cigarette. The experimental results are shown in tables 3 and 4 below. For reference, in table 3 below, a self-extinguishing time of "3 puffs" means that the heated cigarette self-extinguishes after the second puff and before the third puff. The self-extinguishment rate in Table 4 was calculated from the results of the experiments described in Table 3, and a self-extinguishment rate of "100% before 5 puffs" means that the heated cigarette was self-extinguished before the fifth puff in all the experiments.

TABLE 3 Table 3

TABLE 4 Table 4

Referring to tables 3 and 4, it was confirmed that the self-extinguishing rate of the heated cigarettes according to examples 1 to 4 was significantly better than that of comparative example 1. Thus, it is known that the wrapping paper of the flame retardant paper material can greatly reduce the flammability of the aerosol-generating article. In addition, the self-extinguishing time of the heated cigarette according to example 3 was fast compared to comparative example 1. This means that the flammability of the aerosol-generating article can be further reduced when a double (or multi) layer flame retardant paper material is applied.

In addition, it was confirmed that the self-extinguishing rate of the heated cigarette according to example 1 was superior to that of example 4. Specifically, the self-extinguishment rate of example 1 was about 60% and the self-extinguishment rate of example 4 was only about 10% on a 3-puff basis. This means that the physical properties (e.g. basis weight, thickness, tensile strength) of the paper material affect the aerosol-generating articleFrom this, it can be seen that in order to sufficiently reduce the flammability of the aerosol-generating article, a quantitative amount of about 32g/m is preferably used ² The above flame retardant paper material having a tensile strength of about 28N/15mm or more and a thickness of about 45 μm or more is used as a wrapping paper.

In addition, although not shown in tables 3 and 4, when the heated cigarette according to example 4 was manufactured, it was found that operability of the manufacturing process was significantly reduced due to durability problems of materials and the like. As can be seen, in terms of the operability of the manufacturing process, it is preferable to use a quantitative amount of about 32g/m ² The above flame retardant paper material having a tensile strength of about 28N/15mm or more and a thickness of about 45 μm or more is used as a wrapping paper.

The structure and effects of the aerosol-generating article (e.g., 100) described above are described in more detail by examples and comparative examples.

Although the embodiments of the present disclosure have been described above with reference to the drawings, it will be understood by those having ordinary skill in the art to which the present disclosure pertains that it may be implemented in other specific forms without changing the technical spirit or essential features of the present disclosure. Accordingly, it should be understood that the above-described embodiments are illustrative in all respects, rather than restrictive. The scope of the present disclosure should be interpreted by the claims, and all technical ideas within the equivalent scope should be interpreted as falling within the scope of the technical ideas defined by the present disclosure.

Claims

1. An aerosol-generating article for use with an aerosol-generating device, comprising:

an aerosol-forming substrate portion;

a filtering part; and

a wrapper of flame retardant paper material surrounding at least a portion of the aerosol-forming substrate portion.

2. An aerosol-generating article according to claim 1, wherein,

the ration of the flame retardant paper material is 38g/m ² To 48g/m ² 。

3. An aerosol-generating article according to claim 1, wherein,

the thickness of the flame retardant paper material is 50 μm to 60 μm.

4. An aerosol-generating article according to claim 1, wherein,

the tensile strength of the flame retardant paper material is 35N/15mm to 45N/15mm.

5. An aerosol-generating article according to claim 1, wherein,

the elongation of the flame retardant paper material is 2% to 4%.

6. An aerosol-generating article according to claim 1, wherein,

the whiteness of the flame retardant paper material is 80 to 90%.

7. An aerosol-generating article according to claim 1, wherein,

the air permeability of the flame retardant paper material is 2CU to 10CU.

8. An aerosol-generating article according to claim 1, wherein,

also comprises an external packing paper for wrapping the packing paper,

at least a portion of the outer wrapper is also made of a flame retardant paper material.

9. An aerosol-generating article according to claim 1, wherein,

the flame retardant paper material is a paper material coated with a flame retardant coating composition,

the coating composition includes at least one selected from the group consisting of phosphoric acid, magnesium hydroxide, and aluminum hydroxide, and at least one selected from the group consisting of distilled water and ethanol.