WO2022139141A1 - Cellulose acetate tow, filter comprising same, and aerosol-generating article comprising filter - Google Patents

Abstract

Embodiments relate to a cellulose acetate tow, a filter comprising same, and an aerosol-generating article comprising the filter.

Description

Cellulose acetate tow, filter comprising same, and aerosol-generating article comprising said filter

Embodiments relate to a cellulose acetate tow, a filter comprising the same, and an aerosol-generating article comprising the filter.

In recent years, there has been an increasing demand for an alternative method that overcomes the shortcomings of common cigarettes and smoking articles. For example, there is an increasing demand for a method of generating an aerosol as the aerosol-generating material in the cigarette is heated, rather than a method of generating the aerosol by burning the cigarette. Accordingly, studies on smoking articles or devices that operate in various ways are being actively conducted.

The heating-type cigarette, in which an aerosol is generated as the aerosol-generating material in the cigarette is heated, is insufficient in the amount of atomization provided to the user compared to the conventional combustion-type cigarette due to the relatively high suction resistance and aerosol removal ability of the filter. Therefore, research has been required to increase the amount of atomization provided to the user in the heated cigarette.

The problem to be solved by the embodiments is to provide an aerosol-generating article comprising a filter having a low suction resistance and a cellulose acetate tow for realizing a filter having a low suction resistance.

The problems to be solved through the embodiments are not limited to the above-mentioned problems, and the problems not mentioned can be clearly understood by those of ordinary skill in the art to which the embodiments belong from the present specification and the accompanying drawings. will be.

As a technical means for achieving the above-described technical problem, one embodiment provides a first part comprising an aerosol-generating substrate impregnated with an aerosol-generating element, a second part comprising a tobacco element, and a third part comprising a cooling element and a fourth portion comprising a filter element, wherein the first portion, the second portion, the third portion, and the fourth portion are arranged in sequence relative to the longitudinal direction of the aerosol-generating article, the filter element provides an aerosol-generating article comprising a cellulose acetate tow having a denier per filament of from 17 to 29 and a total denier from 10,000 to 40,000.

Other embodiments provide a filter comprising a cellulose acetate tow having a denier per filament of between 17 and 29 and a total denier of between 10,000 and 40,000.

Still other embodiments provide a cellulose acetate tow having a denier per filament of between 17 and 29 and a total denier of between 10,000 and 40,000.

Means of solving the problem are not limited to the above, and may include all matters that can be inferred by a person skilled in the art throughout the present specification.

According to the aerosol-generating article according to the embodiments, it is possible to lower the suction resistance by including the cellulose acetate tow including the fibers of a relatively coarse thickness, and it is possible to provide a more improved smoking satisfaction to the user. In addition, since the amount of cellulose acetate tow can be increased while maintaining a low suction resistance, the hardness of the filter can be improved, thereby improving user convenience.

The effects of the embodiments are not limited to the above, and may include all effects that can be inferred from the configuration to be described later.

1 to 3 are views illustrating examples in which an aerosol-generating article is inserted into an aerosol-generating device.

4 is a diagram illustrating an example of an aerosol generating device using an induction heating method.

5 is a diagram schematically illustrating the structure of an aerosol-generating article according to an embodiment.

One embodiment comprises a first part comprising an aerosol-generating substrate impregnated with an aerosol-generating element, a second part comprising a tobacco element, a third part comprising a cooling element and a fourth part comprising a filter element; , the first portion, the second portion, the third portion, and the fourth portion are arranged in sequence relative to the longitudinal direction of the aerosol-generating article, the filter element having a denier per filament of 17 to 29 and a cellulose acetate tow having a total denier of 10,000 to 40,000.

In an embodiment, the cellulose acetate tow may have a denier per filament of 18 to 23, and a total denier of 15,000 to 35,000.

In an embodiment, the fourth portion may include 320 to 510 mg of cellulose acetate tow.

In an embodiment, the perimeter of the cross-section perpendicular to the longitudinal direction of the aerosol-generating article of the fourth part may be 14 to 25 mm.

In an embodiment, the suction resistance of the fourth part may be 0.5 to 2.5 mmH ₂ O.

In an embodiment, the second part may further include the aerosol-generating component, and the second part may include the aerosol-generating component in 10 wt% or less based on the dry weight of the aerosol-generating substrate.

In an embodiment, the first portion may comprise 65 to 95% by weight of the aerosol-generating component, based on the dry weight of the aerosol-generating substrate.

Other embodiments provide a filter comprising a cellulose acetate tow having a denier per filament of between 17 and 29 and a total denier of between 10,000 and 40,000.

In an embodiment, the cellulose acetate tow may have a denier per filament of 18 to 23, and a total denier of 15,000 to 35,000.

In an embodiment, the filter may include 350 to 510 mg of the cellulose acetate tow.

In an embodiment, the circumference of the cross section perpendicular to the longitudinal direction of the filter of the filter may be 14 to 25 mm.

In an embodiment, the suction resistance of the filter may be 0.5 to 2.5 mmH ₂ O.

Still other embodiments provide a cellulose acetate tow having a denier per filament of between 17 and 29 and a total denier of between 10,000 and 40,000.

In an embodiment, the cellulose acetate tow may have a denier per filament of 18 to 23, and a total denier of 15,000 to 35,000.

Terms used in the embodiments are selected as currently widely used general terms as possible while considering the functions in the present embodiments, but this may vary depending on the intention or precedent of a person skilled in the art, the emergence of new technology, etc. . In addition, in a specific case, there is a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the corresponding embodiments. Therefore, the terms used in the present embodiments should be defined based on the meaning of the term and the overall contents of the present embodiments, rather than the simple name of the term.

In the entire specification, when a part "includes" a certain element, this means that other elements may be further included, rather than excluding other elements, unless otherwise stated. In addition, terms such as “-unit” and “-module” described in the specification mean a unit that processes at least one function or operation, which may be implemented as hardware or software, or may be implemented as a combination of hardware and software.

Also, as used herein, terms including an ordinal number such as “first” or “second” may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

Throughout the specification, "aerosol-generating article" means an article used for smoking. For example, the aerosol-generating article may be a regular combustion cigarette used in a manner that is ignited and combusted, or it may be a heated cigarette used in a manner that is heated by an aerosol-generating device. As another example, the aerosol-generating article may be an article that is used in such a way that the liquid contained in the cartridge is heated.

Throughout the specification, “lengthwise direction of the aerosol-generating article” means the direction in which the length of the aerosol-generating article extends or the direction in which the aerosol-generating article is inserted into the aerosol-generating device.

Throughout the specification, "tobacco element" means an element comprising tobacco material.

Throughout the specification, "tobacco material" means any form of material including components derived from tobacco leaves.

Throughout the specification, "cooling element" means an element that cools a substance. For example, the cooling element may cool the aerosol generated by the aerosol generating element or the tobacco element.

Throughout the specification, "filter element" means an element comprising a filtering material. For example, the filter element may comprise a plurality of fiber strands.

Throughout the specification, "denier per filament" means the fineness of a fiber expressed by the weight (g) of one cellulose acetate fiber per 9000 m of unit length.

Throughout the specification, "total denier" means the fineness of the tow expressed by the weight (g) of the tow per 9000 m of unit length.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily implement them. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein.

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

1 to 3 are views illustrating examples in which an aerosol-generating article is inserted into an aerosol-generating device.

Referring to FIG. 1 , the aerosol generating device 100 includes a battery 110 , a control unit 120 , and a heater 130 .

2 and 3 , the aerosol generating device 100 further includes a vaporizer 140 . In addition, the aerosol-generating article 200 may be inserted into the inner space of the aerosol-generating device 100 .

The aerosol generating device 100 illustrated in FIGS. 1 to 3 includes components related to the present embodiment. Therefore, it can be understood by those of ordinary skill in the art related to this embodiment that other general-purpose components other than those shown in FIGS. 1 to 3 may be further included in the aerosol generating device 100 . .

In addition, although it is illustrated that the heater 130 is included in the aerosol generating device 100 in FIGS. 2 and 3 , the heater 130 may be omitted if necessary.

In FIG. 1 , the battery 110 , the controller 120 , and the heater 130 are shown to be arranged in a line. Also, in FIG. 2 , the battery 110 , the control unit 120 , the vaporizer 140 , and the heater 130 are illustrated as being arranged in a line. In addition, FIG. 3 shows that the vaporizer 140 and the heater 130 are disposed in parallel. However, the internal structure of the aerosol generating device 100 is not limited to those shown in FIGS. 1 to 3 . In other words, the arrangement of the battery 110 , the controller 120 , the heater 130 , and the vaporizer 140 may be changed according to the design of the aerosol generating device 100 .

When the aerosol-generating article 200 is inserted into the aerosol-generating device 100 , the aerosol-generating device 100 operates the heater 130 and/or vaporizer 140 , thereby causing the aerosol-generating article 200 and/or vapor An aerosol may be generated from the firearm 140 . The aerosol generated by the heater 130 and/or vaporizer 140 passes through the aerosol generating article 200 and is delivered to the user.

If necessary, the aerosol-generating device 100 may heat the heater 130 even when the aerosol-generating article 200 is not inserted into the aerosol-generating device 100 .

The battery 110 supplies power used to operate the aerosol generating device 100 . For example, the battery 110 may supply power to the heater 130 or the vaporizer 140 to be heated, and may supply power necessary for the control unit 120 to operate. In addition, the battery 110 may supply power required to operate a display, a sensor, a motor, etc. installed in the aerosol generating device 100 .

The controller 120 controls the overall operation of the aerosol generating device 100 . Specifically, the controller 120 controls the operation of the battery 110 , the heater 130 , and the vaporizer 140 as well as other components included in the aerosol generating device 100 . In addition, the controller 120 may determine whether the aerosol generating device 100 is in an operable state by checking the state of each of the components of the aerosol generating device 100 .

The controller 120 includes at least one processor. The processor may be implemented as an array of a plurality of logic gates, or may be implemented as a combination of a general-purpose microprocessor and a memory in which a program executable in the microprocessor is stored. In addition, it can be understood by those skilled in the art that the present embodiment may be implemented in other types of hardware.

The heater 130 may be heated by power supplied from the battery 110 . For example, when the aerosol-generating article 200 is inserted into the aerosol-generating device 100 , the heater 130 may be located outside the aerosol-generating article 200 . Accordingly, the heated heater 130 may raise the temperature of the aerosol-generating material within the aerosol-generating article 200 .

The heater 130 may be an electrically resistive heater. For example, the heater 130 may include an electrically conductive track, and the heater 130 may be heated as current flows through the electrically conductive track. However, the heater 130 is not limited to the above-described example, and may be applicable without limitation as long as it can be heated to a desired temperature. Here, the desired temperature may be preset in the aerosol generating device 100 or may be set to a desired temperature by the user.

Meanwhile, as another example, the heater 130 may be an induction heating type heater. Specifically, the heater 130 may include an electrically conductive coil for heating the aerosol-generating article in an induction heating manner, and the aerosol-generating article may include a susceptor capable of being heated by an induction heating heater.

For example, the heater 130 may include a tubular heating element, a plate-shaped heating element, a needle-shaped heating element, or a rod-shaped heating element, depending on the shape of the heating element, inside or outside the aerosol-generating article 200 . It can be heated outside.

In addition, a plurality of heaters 130 may be disposed in the aerosol generating device 100 . In this case, the plurality of heaters 130 may be disposed to be inserted into the aerosol-generating article 200 , or may be disposed outside the aerosol-generating article 200 . In addition, some of the plurality of heaters 130 may be disposed to be inserted into the aerosol-generating article 200 , and others may be disposed outside the aerosol-generating article 200 . In addition, the shape of the heater 130 is not limited to the shape shown in FIGS. 1 to 3 , and may be manufactured in various shapes.

Vaporizer 140 may heat the liquid composition to generate an aerosol, and the generated aerosol may pass through aerosol-generating article 200 and delivered to a user. In other words, the aerosol generated by the vaporizer 140 may move along an airflow path of the aerosol generating device 100 , wherein the aerosol generated by the vaporizer 140 passes through the aerosol generating article 200 . It may be configured to pass through and be delivered to the user.

For example, vaporizer 140 may include, but is not limited to, liquid reservoirs, liquid delivery means, and heating elements. For example, the liquid reservoir, liquid delivery means, and heating element may be included in the aerosol generating device 100 as independent modules.

The liquid reservoir may store the liquid composition. For example, the liquid composition may be a liquid comprising a tobacco-containing material comprising a volatile tobacco flavor component, or may be a liquid comprising a non-tobacco material. The liquid storage unit may be manufactured to be detachably/attached from the vaporizer 140 , or may be manufactured integrally with the vaporizer 140 .

For example, the liquid composition may include water, a solvent, ethanol, a plant extract, a flavoring, flavoring agent, or a vitamin mixture. The fragrance may include, but is not limited to, menthol, peppermint, spearmint oil, various fruit flavoring ingredients, and the like. Flavoring agents may include ingredients capable of providing a user with a variety of flavors or flavors. The vitamin mixture may be a mixture of at least one of vitamin A, vitamin B, vitamin C, and vitamin E, but is not limited thereto. Liquid compositions may also include aerosol formers such as glycerin and propylene glycol.

The liquid delivery means may deliver the liquid composition of the liquid reservoir to the heating element. For example, the liquid delivery means may be, but is not limited to, a wick such as cotton fiber, ceramic fiber, glass fiber, or porous ceramic.

The heating element is an element for heating the liquid composition delivered by the liquid delivery means. For example, the heating element may be, but is not limited to, a metal heating wire, a metal heating plate, a ceramic heater, or the like. In addition, the heating element may be composed of a conductive filament, such as a nichrome wire, and may be arranged to be wound around the liquid delivery means. The heating element may be heated by supplying an electrical current, and may transfer heat to the liquid composition in contact with the heating element, thereby heating the liquid composition. As a result, an aerosol may be generated.

For example, the vaporizer 140 may be referred to as a cartomizer or an atomizer, but is not limited thereto.

Meanwhile, the aerosol generating device 100 may further include general-purpose components in addition to the battery 110 , the controller 120 , the heater 130 , and the vaporizer 140 . For example, the aerosol generating device 100 may include a display capable of outputting visual information and/or a motor for outputting tactile information. In addition, the aerosol-generating device 100 may include at least one sensor (a puff sensor, a temperature sensor, an aerosol-generating article insertion detection sensor, etc.). In addition, the aerosol-generating device 100 may be manufactured to have a structure in which external air may be introduced or internal gas may flow out even in a state in which the aerosol-generating article 200 is inserted.

Although not shown in FIGS. 1 to 3 , the aerosol generating device 100 may constitute a system together with a separate cradle. For example, the cradle may be used to charge the battery 110 of the aerosol generating device 100 . Alternatively, the heater 130 may be heated in a state in which the cradle and the aerosol generating device 100 are coupled.

The aerosol-generating article 200 may resemble a conventional combustible cigarette. For example, the aerosol-generating article 200 may be divided into a first part comprising an aerosol-generating material and a second part comprising a filter or the like. Alternatively, the second portion of the aerosol-generating article 200 may also include an aerosol-generating material. For example, an aerosol-generating material made in the form of granules or capsules may be inserted into the second part.

The entire first part may be inserted into the aerosol generating device 100 , and the second part may be exposed to the outside. Alternatively, only a part of the first part may be inserted into the aerosol generating device 100 , or the whole of the first part and a part of the second part may be inserted. The user may inhale the aerosol while biting the second part with the mouth. At this time, the aerosol is generated by passing the external air through the first part, the generated aerosol is delivered to the user's mouth through the second part.

As an example, external air may be introduced through at least one air passage formed in the aerosol generating device 100 . For example, the opening and closing of the air passage and/or the size of the air passage formed in the aerosol generating device 100 may be adjusted by the user. Accordingly, the amount of atomization, the feeling of smoking, and the like can be adjusted by the user. As another example, external air may be introduced into the interior of the aerosol-generating article 200 through at least one hole formed in the surface of the aerosol-generating article 200 .

4 is a diagram illustrating an example of an aerosol generating device using an induction heating method.

Referring to FIG. 4 , the aerosol generating device 100 includes a battery 110 , a controller 120 , a coil C and a susceptor S. Further, at least a portion of the aerosol-generating article 200 may be accommodated in the cavity V of the aerosol-generating device 100 . The aerosol-generating article 200 , the battery 110 and the controller 120 of FIG. 4 may correspond to the aerosol-generating article 200 , the battery 110 and the controller 120 of FIGS. 1 to 3 . Also, the coil C and the susceptor S may be included in the heater 13000 . Accordingly, overlapping descriptions are omitted.

The aerosol generating device 100 illustrated in FIG. 4 includes components related to the present embodiment. Therefore, it can be understood by those of ordinary skill in the art related to the present embodiment that other general-purpose components other than those shown in FIG. 4 may be further included in the aerosol generating device 100 .

The coil C may be positioned around the cavity V. Although the coil C is illustrated as being disposed to surround the cavity V in FIG. 4 , the present invention is not limited thereto.

Once the aerosol-generating article 200 is received in the cavity V of the aerosol-generating device 100 , the aerosol-generating device 100 may power the coil C so that the coil C generates a magnetic field. As the magnetic field generated by the coil C passes through the susceptor S, the susceptor S may be heated.

This induction heating phenomenon is a known phenomenon explained by Faraday's Law of induction. Specifically, when the magnetic induction in the susceptor S changes, an electric field is generated in the susceptor S, so that an eddy current flows in the susceptor S. Eddy currents generate heat in the susceptor S that is proportional to the current density and conductor resistance.

The susceptor S is heated by the eddy current, and the aerosol generating material in the aerosol generating article 200 is heated by the heated susceptor S to generate an aerosol. The aerosol generated from the aerosol-generating material passes through the aerosol-generating article 200 and is delivered to the user.

The battery 110 may supply power to the coil C to generate a magnetic field. The control unit 120 may be electrically connected to the coil (C).

The coil C may be an electrically conductive coil that generates a magnetic field by power supplied from the battery 110 . The coil C may be disposed to surround at least a portion of the cavity V. The magnetic field generated by the coil C may be applied to the susceptor S disposed at the inner end of the cavity V.

The susceptor (S) is heated as the magnetic field generated from the coil (C) penetrates, and may include metal or carbon. For example, the susceptor S may include at least one of ferrite, a ferromagnetic alloy, stainless steel, and aluminum.

The susceptor (S) is graphite, molybdenum (molybdenum), silicon carbide (silicon carbide), niobium (niobium), nickel alloy (nickel alloy), a metal film (metal film), ceramics such as zirconia (zirconia), At least one of a transition metal such as nickel (Ni) or cobalt (Co) and a metalloid such as boron (B) or phosphorus (P) may be included. However, the susceptor (S) is not limited to the above-described example, and as long as it can be heated to a desired temperature as a magnetic field is applied, it may correspond without limitation. Here, the desired temperature may be preset in the aerosol generating device 100 or may be set to a desired temperature by the user.

When the aerosol-generating article 200 is received in the cavity V of the aerosol-generating device 100 , the susceptor S may be arranged to surround at least a portion of the aerosol-generating article 200 . Thus, the heated susceptor S may raise the temperature of the aerosol-generating material within the aerosol-generating article 200 .

In FIG. 4 , the susceptor S is shown disposed to surround at least a portion of the aerosol-generating article, but is not limited thereto. For example, the susceptor S may include a tubular heating element, a plate-shaped heating element, a needle-shaped heating element, or a rod-shaped heating element, depending on the shape of the heating element, the interior of the aerosol-generating article 200 . Alternatively, the outside can be heated.

In addition, a plurality of susceptors S may be disposed in the aerosol generating device 100 . At this time, the plurality of susceptors (S) may be disposed on the outside of the aerosol-generating article 200, may be disposed to be inserted therein. In addition, some of the plurality of susceptors (S) may be disposed to be inserted into the aerosol-generating article 200 , and the rest may be disposed outside the aerosol-generating article 200 . In addition, the shape of the susceptor (S) is not limited to the shape shown in FIG. 4, and may be manufactured in various shapes.

5 is a diagram schematically illustrating the structure of an aerosol-generating article 200 according to an embodiment.

Referring to FIG. 5 , the aerosol-generating article 200 may include a first portion 210 , a second portion 220 , a third portion 230 , and a fourth portion 240 . Specifically, the first portion 210 , the second portion 220 , the third portion 230 , and the fourth portion 240 may each include an aerosol generating element, a tobacco element, a cooling element, and a filter element. have. As an example, the first portion 210 may include an aerosol generating material, the second portion 220 may include a tobacco material and a humectant, and the third portion 230 may include the first portion 210 . and cooling the airflow passing through the second portion 220 , and the fourth portion 240 may include a filter material.

Referring to FIG. 5 , the first part 210 , the second part 220 , the third part 230 , and the fourth part 240 are sequentially arranged in the longitudinal direction of the aerosol-generating article 200 . can be sorted. Here, the longitudinal direction of the aerosol-generating article 200 may be a direction in which the length of the aerosol-generating article 200 extends. For example, the longitudinal direction of the aerosol-generating article 200 may be a direction from the first portion 210 to the fourth portion 240 . Accordingly, the aerosol generated in at least one of the first part 210 and the second part 220 is the first part 210 , the second part 220 , the third part 230 , and the fourth part ( 240 in order to form an airflow, thereby allowing the smoker to inhale the aerosol from the fourth portion 240 .

The first portion 210 may include an aerosol generating element. It may also contain other additive substances such as flavoring agents, wetting agents and/or organic acids, and may contain flavoring agents such as menthol or humectants. Here, the aerosol generating component may comprise, for example, at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol and oleyl alcohol. However, the present disclosure is not limited to the above-described examples, and the present disclosure may include all of various types of aerosol generating elements widely known in the art.

The first portion 210 may comprise an aerosol-generating substrate impregnated with an aerosol-generating element. An example of an aerosol-generating substrate may include a crimped sheet, and the aerosol-generating element may be included in the first portion 210 impregnated in the crimped sheet. In addition, flavoring agents, wetting agents, and/or other additive substances such as organic acids and flavoring agents may be included in the first portion 210 in a state of being absorbed into the crimped sheet.

The crimped sheet may be a sheet made of a polymer material. For example, the polymer material may include at least one of paper, cellulose acetate, lyocell, and polylactic acid. For example, the crimped sheet may be a paper sheet that does not generate off-flavor due to heat even when heated to a high temperature. However, the present invention is not limited thereto.

The first portion 210 may extend from about 7 to about 20 mm from the distal end of the aerosol-generating article 200 , and the second portion 220 may extend from about 7 to about 20 mm from the end of the first portion 210 . It can be extended to a point of 20 mm. However, it is not necessarily limited to this numerical range, and the length to which each of the first part 210 and the second part 220 is extended may be appropriately adjusted within a range that can be easily changed by a person skilled in the art.

The second portion 220 may comprise a tobacco element. The tobacco component may be a specific type of tobacco material. For example, the tobacco component may be in the form of tobacco cut filler, tobacco particles, tobacco sheets, tobacco beads, tobacco granules, tobacco powder or tobacco extract. In addition, the tobacco material may include, for example, one or more of tobacco leaves, tobacco ribs, expanded tobacco, cut cut filler, leaf cut filler, and reconstituted tobacco.

The third portion 230 may cool the airflow passing through the first portion 210 and the second portion 220 . The third part 230 may be made of a polymer material or a biodegradable polymer material, and may have a cooling function. For example, the third portion 230 may be made of polylactic acid (PLA) fiber, but is not limited thereto. Alternatively, the third part 230 may be made of a cellulose acetate filter having a plurality of holes. However, the third part 230 is not limited to the above-described example, and the material performing the function of cooling the aerosol may correspond to this without limitation. For example, the third part 230 may be a tube filter or a paper tube including a hollow.

The fourth portion 240 may include a filter element. For example, the fourth portion 240 may be a cellulose acetate filter. Meanwhile, the shape of the fourth part 240 is not limited. For example, the fourth part 240 may be a cylindrical rod, or a tubular rod including a hollow therein. Also, the fourth part 240 may be a recess type rod. If the fourth part 240 is composed of a plurality of segments, at least one of the plurality of segments may be manufactured in a different shape.

The fourth portion 240 may be manufactured to generate flavor. As an example, the flavoring liquid may be injected into the fourth part 240 , and a separate fiber to which the flavoring liquid is applied may be inserted into the fourth part 240 .

The aerosol-generating article 200 may include a wrapper 250 surrounding at least a portion of the first portion 210 to the fourth portion 240 . Further, the aerosol-generating article 200 may include a wrapper 250 surrounding all of the first portion 210 to the fourth portion 240 . The wrapper 250 may be positioned on the outermost side of the aerosol-generating article 200 , and the wrapper 250 may be a single wrapper, but may be a combination of a plurality of wrappers.

As an example, the first portion 210 of the aerosol-generating article 200 comprises a crimped pleated sheet containing an aerosol-generating material, and the second portion 220 comprises platelet cut filler as a tobacco material and glycerin as a humectant. may include, the third portion 230 may include a paper tube, and the fourth portion 240 may include cellulose acetate (CA) fibers, but the present disclosure is not necessarily limited thereto.

Hereinafter, the fourth part 240 of the aerosol-generating article 200 will be described in more detail.

As noted above, the fourth portion 240 may include a filter element, the filter element comprising a cellulose acetate tow having a denier per filament of between 17 and 29 and a total denier of between 10,000 and 40,000. can

Cellulose acetate tow means an article made of cellulose acetate suitable for the manufacture of filters of aerosol-generating articles. This is a fine fiber of cellulose acetate, and the thickness of the cellulose acetate fiber affects physical factors such as suction resistance and hardness and circumference of the aerosol-generating article. In the case of cellulose acetate tow used in filters of conventional combustion-type cigarettes, it has a denier per filament of 3.0 to 6.0, and in the case of a cellulose acetate tow used in a filter of a commercially available heated cigarette, it can generally have a denier per filament of 9.0. .

The cellulose acetate tow included in the filter element according to the embodiment has a higher denier per filament and total denier than a cellulose acetate tow applied to a conventional conventional heated cigarette. The higher the denier per filament of the fibers constituting the cellulose acetate tow, the thicker the fiber. The ability to remove the aerosol may be reduced. Therefore, when using a filter comprising a cellulose acetate tow according to the embodiment, it has the effect of increasing the amount of atomization carried out to the user.

Preferably, the cellulose acetate tow has a denier per filament of 18 to 23, and may have a total denier of 15,000 to 35,000. While reducing suction resistance and aerosol removal ability in the filter, the feeling of hitting, harmony, and irritation felt by the user during smoking , has the effect of improving smoking satisfaction, such as a feeling of satisfaction.

According to an embodiment, the fourth portion 240 may include 320 to 510 mg of cellulose acetate tow. Since the fourth part 240 of the aerosol-generating article 200 according to the embodiment includes a cellulose acetate tow having a relatively coarse fiber thickness, a large amount of tow is input as compared to a conventional cellulose acetate tow having a relatively thin fiber thickness. However, it is possible to maintain a low suction resistance. The roundness and hardness of the fourth portion 240 may be improved by including a greater amount of cellulose acetate tow in the fourth portion 240 of the aerosol-generating article 200 . For example, the fourth portion 240 of the aerosol-generating article 200 according to an embodiment may have a roundness of at least 93% and a hardness of at least 95%.

The roundness refers to the degree of whether the cross section of the fourth part 240 is round or not, and can be measured through a known technique. For example, after supporting the center of the fourth part 240 , the fourth part 240 is rotated and the measurement is performed using a comparator or the like, and the radius error can be obtained by the movement of the measurer.

The hardness is a physical property related to elasticity and restoration degree of the fourth part 240 , and refers to a degree to which the fourth part 240 resists pressure applied in a vertical direction in the longitudinal direction. When the user uses the aerosol-generating article, the aerosol-generating article needs to maintain its shape so that it can be easily used by maintaining a hardness of at least a certain level.

When the aerosol-generating article 200 contains less than 320 mg of cellulose acetate tow, the cellulose acetate tow positioned at the central portion of the cross-section of the fourth portion 240 is pushed in the longitudinal direction of the fourth portion 240 . A recess phenomenon may occur. When the aerosol-generating article 200 contains more than 510 mg of cellulose acetate tow, the packaging condition using the wrapper 250 is poor or the wrapper 250 is damaged because the input amount of the cellulose acetate tow is too large, and repeated suction resistance In the measurement of , the standard deviation of the result value was too high, making it difficult to provide uniform performance.

The perimeter of the cross-section perpendicular to the longitudinal direction of the aerosol-generating article 200 of the fourth portion 240 may be between 14 and 25 mm. As described above, since the aerosol-generating article 200 according to the embodiment includes a cellulose acetate tow having a relatively thick fiber, hardness may be improved. The perimeter range corresponds to a small value compared to the perimeter of a cross-section of a general aerosol-generating article 200 . Although the thickness of the fourth part 240 and the aerosol-generating article 200, that is, the perimeter of the cross-section is reduced, there is an advantage that usability can be secured by maintaining the shape as the hardness is improved.

The suction resistance of the fourth portion 240 may be 0.5 mmH ₂ O to 2.5 mmH ₂ O. Since the fourth part 240 of the aerosol-generating article 200 according to the embodiment includes a cellulose acetate tow having a relatively thick fiber, low resistance to suction can be implemented. The suction resistance in the above range may provide a feeling of satisfaction by preventing the user from applying too much force to the suction of the aerosol when using the aerosol-generating article 200 . In addition, the aerosol-generating article 200 according to the embodiment may not only have a low resistance to suction, but also maintain a hardness that ensures usability by a tow including a coarse fiber.

The tensile strength of the cellulose acetate tow may be less than about 3.5 kgf, and more preferably, less than about 3.0 kgf. Cellulose acetate tow according to the embodiment may have improved productivity in the range of less than about 3.5 kgf of tensile strength due to the thickness of a relatively coarse fiber. When the tensile strength of the cellulose acetate tow is about 3.5 kgf or more, the foldability may be insufficient in the crimping process of the tow due to the thickness of the coarse fibers, and mass production may be difficult.

The second portion 220 may further include an aerosol-generating component, and the second portion 220 may include up to 10% by weight of the aerosol-generating component, based on the dry weight of the aerosol-generating substrate. In addition, the first portion 210 may comprise 65 to 95% by weight of the aerosol-generating element, based on the dry weight of the aerosol-generating substrate. Since the filter including the cellulose acetate tow according to the embodiment has a low aerosol removal ability, even if a relatively small amount of an aerosol generating element is included in the first portion 210 and the second portion 220, the atomization amount and satisfaction are sufficient for the user. has the effect of providing

The second part 220 further includes an aerosol generating element, and the second part 220 is an aerosol generating element in that it is possible to further improve the smoking satisfaction such as the feeling of hitting, harmony, stimulation, and satisfaction felt by the user during smoking. and up to 3% by weight of urea, based on the dry weight of the aerosol-generating substrate. In addition, the first portion 210 may comprise 65 to 80% by weight of the aerosol-generating element, based on the dry weight of the aerosol-generating substrate.

Example 1. Cellulose Acetate Tow

Cellulose acetate tows were prepared having a denier per filament of 20.0 and a total denier of 25,000.

Example 2. Filters Comprising Cellulose Acetate Tow

A filter comprising the cellulose acetate tow of Example 1 was prepared under the conditions shown in Table 1 below. The prepared filter was prepared according to the weight (415 mg, 380 mg, 350 mg and 506 mg) of the cellulose acetate tow contained in the filter, respectively, Example 2-1, Example 2-2, Example 2-3 and Example 2- 4 was named. The wrapper used in the manufacture of the filter used general paper with a basis weight of 75 gsm, and triacetin was used as a plasticizer.

division	tow weight (mg)	filter weight (mg)	Round (mm)	Filter cross-section goodness	work goodness
Example 2-1	415	645	21.95	Good	Good
Example 2-2	380	610	22.01	Good	Good
Example 2-3	350	520	21.90	occurrence of recess	-
Example 2-4	506	676	21.92	error	-

In addition, the filter cross-sectional goodness and work goodness were evaluated during the manufacturing process of the filter. Here, the filter cross-section quality is an evaluation of whether the cross-section is uniformly formed during the cutting process of the filter, and the work quality is an evaluation of whether the packaging operation using the wrapper has been performed well during the manufacturing process of the filter. As can be seen, in Example 2-3 containing 350 mg of tow weight, a recess phenomenon occurred in which the cellulose acetate tow at the center of the cross-section of the filter was pushed in the longitudinal direction of the filter, and the amount of cellulose acetate tow was excessively In addition, in the case of Example 2-4 containing 506 mg of tow weight, a uniform filter cross-section was not formed, and the amount of cellulose acetate tow was too large to be packaged using a wrapper. This was bad.

Comparative Example 1. Cellulose acetate tow

Commercially available cellulose acetate tow used in the filter of a heated cigarette was used.

Comparative Example 2. Filter comprising cellulose acetate tow

A filter including the cellulose acetate tow of Comparative Example 1 was prepared under the conditions shown in Table 2 below. In addition, in the same manner as in Examples 2-1 to 2-4, the filter cross-section quality and work quality were evaluated in the manufacturing process of the filter, and are shown in Table 2 below.

division	tow weight (mg)	filter weight (mg)	Round (mm)	Filter cross-section goodness	work goodness
Comparative Example 2	330	550	22.00	Good	Good

Experimental Example 1. Evaluation of suction resistance and physical performance of a filter containing cellulose acetate tow

Suction resistance, roundness, and hardness of the filters of Examples 2-1 to 2-4 and Comparative Example 2 were evaluated, and the results are shown in Table 3 below.

division	resistance to suction (mmH 2 O)	roundness (%)	Hardness (%)
Example 2-1	106.3	92.95	96.8
Example 2-2	88.1	94.92	95.6
Example 2-3	78.4	93.88	-
Example 2-4	151.7	93.53	-
Comparative Example 2	136.7	94.97	95.9

As shown in Table 3, the suction resistance of Examples 2-1 and 2-2 was 106.3 and 88.1 mmH ₂ O, respectively, and had a small value compared to the suction resistance of Comparative Example 2, whereas Example 2-1 and It was confirmed that the roundness and hardness of Example 2-2 were maintained at a level similar to that of Comparative Example 2. On the other hand, Examples 2-3 and 2-4 had a suction resistance proportional to the input tow weight. In addition, as expected in the filter cross-section quality and work quality evaluation, the roundness decreased, and the hardness could not be measured due to poor packaging by the wrapper.

Experimental Example 2. Analysis of aerosol transition amount

An aerosol-generating article was prepared using the filters of Examples 2-1, 2-2 and Comparative Example 2. The amount of components of nicotine, propylene glycol (PG), glycerin (Gly), and moisture contained in the aerosol carried out through the manufactured aerosol-generating article and the amount of each component remaining in the filter after smoking were measured, and the measurement result is expressed by the following formula By substituting for 1, the removal capacity of the filter was calculated.

[Equation 1]

Removal capacity (%) = (Residual amount of filter after smoking) / (Aerosol transfer amount + Residual amount of filter after smoking) x 100

The aerosol-generating article was prepared in two types to include different configurations, and the aerosol migration amount analysis results of the two types of aerosol-generating article manufactured were divided and displayed in Tables 4 and 5 below, respectively.

applied filter	Aerosol transition amount (mg)				Filter Residue After Smoking (mg)			Removal (%)
	nicotine	PG	Gly	moisture	nicotine	PG	Gly	nicotine	PG	Gly
Example 2-1	0.74	3.13	9.55	25.0	0.67	2.93	3.51	47.7	48.4	26.9
Example 2-2	0.79	3.84	12.32	26.8	0.62	2.87	3.44	44.0	42.8	21.8
Comparative Example 2	0.81	4.02	13.73	24.1	0.55	2.33	2.81	40.6	36.7	17.0

applied filter	Aerosol transition amount (mg)				Filter Residue After Smoking (mg)			Removal (%)
	nicotine	PG	Gly	moisture	nicotine	PG	Gly	nicotine	PG	Gly
Example 2-1	0.62	2.46	8.60	20.1	0.52	3.57	5.49	45.7	59.2	38.9
Example 2-2	0.66	2.79	9.30	21.7	0.49	3.49	5.21	44.2	55.6	35.9
Comparative Example 2	0.74	2.90	9.67	22.5	0.46	3.31	4.83	38.1	53.3	33.3

As shown in Tables 4 and 5, compared to the aerosol-generating article to which the filter of Comparative Example 2 is applied, the transfer amount of the aerosol component of the aerosol-generating article to which the filter of Examples 2-1 and 2-2 is applied is generally improved. could check

Experimental Example 3. Sensory evaluation of aerosol-generated articles

Sensory evaluation was performed on 20 adults using the aerosol-generating article including the filters of Example 2-1 and Comparative Example 2. Aerosol-generating articles were prepared in two types as in Experimental Example 2. For sensory evaluation, a total of six items were evaluated, such as feeling of blow, power to inhale smoke, harmonious beauty, amount of atomization, stimulation, and feeling of satisfaction. After that, the score for each item was recorded. The average value for each item is shown in Tables 6 and 7 below, respectively, according to the type of aerosol-generating article.

evaluation item	Example 2-1	Comparative Example 2
feeling of blow	4.6	4.8
force to suck in smoke	4.2	4.3
harmony	4.625	4.675
No amount	5.625	5.3
pepper	4.075	4.525
sense of satisfaction	5.1	5.0

evaluation item	Example 2-1	Comparative Example 2
feeling of blow	4.275	4.275
force to suck in smoke	3.225	3.75
harmony	4.575	4.55
No amount	6.0	5.6
pepper	4.35	4.125
sense of satisfaction	4.975	5.15

As shown in Tables 6 and 7, the aerosol-generating article including the filter of Example 2-1 provided a higher atomization amount compared to the aerosol-generating article including Comparative Example 2, and required less force for smoke suction A person skilled in the art related to this embodiment will understand that it can be implemented in a modified form without departing from the essential characteristics of the above description. Therefore, the disclosed methods are to be considered in an illustrative rather than a restrictive sense. The scope of the present disclosure is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as included in the present disclosure.

Claims (14)

1. An aerosol-generating article comprising:

   a first portion comprising an aerosol-generating substrate impregnated with an aerosol-generating element;

   a second portion comprising a tobacco element;

   a third portion comprising a cooling element; and

   a fourth part comprising a filter element; comprising;

   wherein the first part, the second part, the third part, and the fourth part are arranged in order with respect to the longitudinal direction of the aerosol-generating article;

   wherein the filter element has a denier per filament of from 17 to 29 and a cellulose acetate tow having a total denier from 10,000 to 40,000.
2. According to claim 1,

   wherein the cellulose acetate tow has a denier per filament of from 18 to 23 and a total denier from 15,000 to 35,000.
3. According to claim 1,

   wherein the fourth portion comprises 320 to 510 mg of cellulose acetate tow.
4. According to claim 1,

   The aerosol-generating article, wherein the perimeter of the cross-section perpendicular to the longitudinal direction of the aerosol-generating article of the fourth part is 14 to 25 mm.
5. According to claim 1,

   wherein the resistance to aspiration of the fourth portion is 0.5 to 2.5 mmH ₂ O.
6. According to claim 1,

   said second portion further comprising said aerosol generating element;

   wherein the second portion comprises no more than 10% by weight, based on the dry weight of the aerosol-generating substrate, of the aerosol-generating component.
7. According to claim 1,

   wherein the first portion comprises 65 to 95% by weight, based on the dry weight of the aerosol-generating substrate, of the aerosol-generating element.
8. A filter for inclusion in an aerosol-generating article, comprising:

   A filter comprising a cellulose acetate tow having a denier per filament of from 17 to 29 and a total denier from 10,000 to 40,000.
9. 9. The method of claim 8,

   wherein the cellulose acetate tow has a denier per filament of from 18 to 23 and a total denier from 15,000 to 35,000.
10. 9. The method of claim 8,

    The filter is a filter comprising 350 to 510 mg of the cellulose acetate tow.
11. 9. The method of claim 8,

    A perimeter of a cross section of the filter perpendicular to the longitudinal direction of the filter is 14 to 25 mm.
12. 9. The method of claim 8,

    The filter has a suction resistance of 0.5 to 2.5 mmH ₂ O.
13. A cellulose acetate tow having a denier per filament of 17 to 29 and a total denier of 10,000 to 40,000.
14. 14. The method of claim 13,

    The cellulose acetate tow has a denier per filament of 18 to 23, and a total denier of 15,000 to 35,000.

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