JP2023510674A - Cellulose acetate tow, filters containing same, and aerosol-generating articles containing said filters - Google Patents

Abstract

Examples relate to cellulose acetate tow, filters comprising the same, and aerosol-generating articles comprising the filters.

Description

The present invention relates to cellulose acetate tow, filters containing same, and aerosol-generating articles containing said filters.

Recently, there has been an increasing demand for alternative methods to overcome the shortcomings of common cigarettes and smoking articles. For example, there is an increasing demand for methods of generating an aerosol by heating the aerosol-generating material within the cigarette rather than burning the cigarette to generate an aerosol. Accordingly, researches related to smoking articles and devices that operate in various ways are being actively pursued.

Heated cigarettes, in which aerosol is generated by heating the aerosol-generating substance in the cigarette, are provided to users compared to existing traditional combustion cigarettes due to the relatively high suction resistance and aerosol removal ability of the filter. Insufficient atomization volume. Accordingly, research has been required to increase the amount of atomization provided to the user in heated cigarettes.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cellulose acetate tow for embodying a filter with low resistance to suction and an aerosol-generating article including a filter with low resistance to suction.

The problems to be solved through the embodiments are not limited to the problems described above, and problems not mentioned will be clearly understood by those skilled in the art in the technical field to which the embodiments belong from the present specification and accompanying drawings. will be understood.

As a technical means for solving the above technical problems, one embodiment provides a first part including an aerosol-generating substrate impregnated with an aerosol-generating element, a second part including a tobacco element, a second part including 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 sequentially aligned with respect to the longitudinal direction of the aerosol-generating article; The filter element has a denier per filament of 17-29 and provides an aerosol-generating article comprising cellulose acetate tow having a total denier of 10,000-40,000.

Another embodiment provides a filter comprising cellulose acetate tow having a denier per filament of 17-29 and a total denier of 10,000-40,000.

Still other examples provide cellulose acetate tow having a denier per filament of 17-29 and a total denier of 10,000-40,000.
Solutions to the problems are not limited to the above, but include any matter that can be inferred by a person of ordinary skill in the entire specification.

Example aerosol-generating articles may include cellulose acetate tow containing relatively thick fibers to reduce drag and provide a user with enhanced smoking satisfaction. In addition, since the amount of cellulose acetate tow can be increased while maintaining low suction resistance, user convenience can be improved by increasing the hardness of the filter.

The effects of the embodiment are not limited to those described above, and may include any effect that can be inferred from the configuration described later.

FIG. 4 is a drawing showing an example in which an aerosol-generating article is inserted into an aerosol-generating device; FIG. 4 is a drawing showing an example in which an aerosol-generating article is inserted into an aerosol-generating device; FIG. 4 is a drawing showing an example in which an aerosol-generating article is inserted into an aerosol-generating device; It is a drawing showing an example of an aerosol generator using an induction heating system. 1 is a drawing that schematically illustrates the structure of an aerosol-generating article according to one embodiment;

One embodiment includes a first portion including an aerosol-generating substrate impregnated with an aerosol-generating element, a second portion including a tobacco element, a third portion including a cooling element, and a fourth portion including a filter element, wherein the first The portions, the second portion, the third portion, and the fourth portion are sequentially aligned with respect to the length of the aerosol-generating article, and the filter element has a denier per filament of 17-29. and an aerosol-generating article comprising cellulose acetate tow having a total denier of 10,000 to 40,000.

In embodiments, the cellulose acetate tow has a denier per filament of 18-23 and a total denier of 15,000-35,000.

In an embodiment, the fourth portion can comprise 320-510 mg of cellulose acetate tow.

In an embodiment, the circumference of the cross-section perpendicular to the longitudinal direction of the aerosol-generating article of the fourth portion is also between 14 and 25 mm.

In an embodiment, the suction resistance of said fourth portion is also 0.5-2.5 mmH ₂ O.

In embodiments, said second portion further comprises said aerosol-generating component, said second portion comprising no more than 10% by weight of said aerosol-generating component, based on the dry weight of said aerosol-generating substrate.

In embodiments, the first portion comprises 65-95% by weight of the aerosol-generating component, based on the dry weight of the aerosol-generating substrate.

Another embodiment provides a filter comprising cellulose acetate tow having a denier per filament of 17-29 and a total denier of 10,000-40,000.

In embodiments, the cellulose acetate tow has a denier per filament of 18-23 and a total denier of 15,000-35,000.

In an embodiment, said filter comprises 350-510 mg of said cellulose acetate tow.

In an embodiment, the perimeter of the cross-section of the filter perpendicular to the longitudinal direction of the filter is also 14-25 mm.

In an embodiment, the suction resistance of said filter is also 0.5-2.5 mmH ₂ O.

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

In embodiments, the cellulose acetate tow has a denier per filament of 18-23 and a total denier of 15,000-35,000.

As for the terms used in the examples, general terms that are currently widely used were selected as much as possible while considering the functions in the present example, but this is not intended by a person skilled in the art or It also varies depending on judicial precedents and the emergence of new technologies. Also, in certain cases, some terms are arbitrarily chosen by the applicant, and their meanings are described in detail in the description part of the embodiment. Therefore, the terms used in this embodiment should be defined based on the meaning of the term and the content of this embodiment as a whole, rather than just the name of the term.

Throughout the specification, when a part "includes" a component, this does not exclude other components, and may further include other components, unless specifically stated to the contrary. means good. In addition, terms such as "--part" and "--module" described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software, or may be implemented by hardware or software. and software.

Also, as used herein, terms including ordinal numbers such as “first” or “second” can be used to describe various components, but the components are limited by the terms. must not. Terms are only used to distinguish one component from another.

As used throughout the specification, "aerosol-generating article" means an article used for smoking. For example, the aerosol-generating article can be a conventional combustible cigarette, used in a manner that is ignited and burned, or a heated cigarette, used in a manner that is heated by an aerosol-generating device. As another example, an aerosol-generating article is also an article that is used in a manner in which the liquid contained in the cartridge is heated.

Throughout the specification, "longitudinal direction of the aerosol-generating article" means the direction along 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.

As used throughout the specification, "tobacco element" means an element that includes tobacco material.

Throughout the specification, "tobacco material" means all forms of material that contain components derived from tobacco leaves.

As used throughout the specification, "cooling element" means an element that causes a substance to cool. For example, the cooling element may cool the aerosol generated from the aerosol generating element or tobacco element.

As used throughout the specification, "filter element" means an element that includes filtering material. For example, the filter element may include multiple fiber strands.

Throughout the specification, "denier per filament" means the density of a fiber expressed in terms of the weight (grams) of a single fiber strand of cellulose acetate per 9000 m of unit length.

Throughout the specification, "total denier" means the density of the tow expressed in grams of tow per unit length of 9000m.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. This invention may, however, be embodied in various different forms and is not limited to the illustrative embodiments set forth herein.

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

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

Referring to FIG. 1, the aerosol generator 100 includes a battery 110, a controller 120, and a heater .

2 and 3, the aerosol generating device 100 further includes a vaporizer 140. As shown in FIG. Also, an aerosol-generating article 200 may be inserted into the interior space of the aerosol-generating device 100 .

The aerosol generating device 100 illustrated in FIGS. 1-3 illustrates the components according to the present embodiment. Therefore, a person having ordinary knowledge in the technical field related to the present embodiment will know that the aerosol generator 100 further includes general-purpose components other than the components illustrated in FIGS. 1 to 3. If so, you will understand.

2 and 3 show that the aerosol generator 100 includes the heater 130, the heater 130 may be omitted if necessary.

FIG. 1 shows that the battery 110, the controller 120, and the heater 130 are arranged in a row. FIG. 2 also shows that the battery 110, the controller 120, the vaporizer 140, and the heater 130 are arranged in a row. Also shown in FIG. 3 is the vaporizer 140 and the heater 130 arranged in parallel. However, the internal structure of the aerosol generator 100 is not limited to that illustrated in FIGS. 1-3. That is, the arrangement of the battery 110, the controller 120, the heater 130, and the vaporizer 140 can be changed according to the design of the aerosol generator 100. FIG.

Once the aerosol-generating article 200 is inserted into the aerosol-generating device 100, the aerosol-generating device 100 activates the heater 130 and/or the vaporizer 140 to generate an aerosol from the aerosol-generating article 200 and/or the vaporizer 140. sell. Aerosol generated by heater 130 and/or vaporizer 140 passes through aerosol-generating article 200 and is transmitted to the user.

Optionally, the aerosol generating device 100 can heat the heater 130 even when the aerosol generating article 200 is not inserted into the aerosol generating device 100 .

Battery 110 supplies power used to operate aerosol generating device 100 . For example, the battery 110 can supply power to heat the heater 130 or the vaporizer 140 and supply power necessary for the operation of the controller 120 . In addition, the battery 110 can supply power necessary for operating the display, sensors, motors, etc. provided in the aerosol generating device 100 .

The controller 120 generally controls the operation of the aerosol generator 100 . Specifically, the controller 120 controls operations of the battery 110 , the heater 130 , and the vaporizer 140 as well as other components included in the aerosol generator 100 . The control unit 120 can also check the state of each configuration of the aerosol generation device 100 and determine whether the aerosol generation device 100 is in an operable state.

Control unit 120 includes at least one processor. A processor may also be embodied by an array of logic gates, and may also be embodied by a combination of a general-purpose microprocessor and a memory in which programs executed by the microprocessor are stored. It will also be appreciated by those skilled in the art to which the present embodiments pertain that other forms of hardware may be implemented.

The heater 130 may be heated by power supplied from the battery 110 . For example, if the aerosol-generating article 200 is inserted into the aerosol-generating device 100 , the heater 130 can be located external to the aerosol-generating article 200 . Heated heater 130 may thus increase the temperature of the aerosol-generating substance in aerosol-generating article 200 .

Heater 130 is also an electrical resistive heater. For example, the heater 130 may include an electrically conductive track, and current flowing through the electrically conductive track may heat the heater 130 . However, the heater 130 is not limited to the above example, and can be applied 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 the desired temperature by the user.

On the other hand, as another example, the heater 130 is also an induction heater. Specifically, the heater 130 includes an electrically conductive coil for inductively heating the aerosol-generating article, which may include a susceptor heated by the inductive heater.

For example, heater 130 may include tubular heating elements, plate heating elements, needle heating elements, or bar heating elements, and may heat the interior or exterior of aerosol-generating article 200 depending on the shape of the heating element.

Also, a plurality of heaters 130 may be arranged in the aerosol generator 100 . At this time, the plurality of heaters 130 may be arranged to be inserted into the aerosol-generating article 200 or may be arranged outside the aerosol-generating article 200 . Also, some of the plurality of heaters 130 may be arranged to be inserted into the aerosol-generating article 200 and the rest may be arranged outside the aerosol-generating article 200 . Also, the shape of the heater 130 is not limited to the shapes illustrated in FIGS. 1 to 3, and may be manufactured in various shapes.

Vaporizer 140 heats the liquid composition to generate an aerosol, which can be transmitted through aerosol-generating article 200 to a user. That is, the aerosol produced by the vaporizer 140 travels along the airflow path of the aerosol-generating device 100, which allows the aerosol produced by the vaporizer 140 to pass through the aerosol-generating article 200 to the user. can be configured to be transmitted.

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

The liquid storage section can store a liquid composition. For example, a liquid composition can be a liquid containing tobacco-containing substances, including volatile tobacco flavor components, or a liquid containing non-tobacco substances. The liquid reservoir is made to be detached/attached to/from the vaporizer 140 and may be made integral with the vaporizer 140 .

For example, liquid compositions may include water, solvents, ethanol, botanical extracts, fragrances, flavoring agents, or vitamin mixtures. Flavors include, but are not limited to, menthol, peppermint, spearmint oil, various fruit flavoring ingredients, and the like. Flavoring agents may include ingredients that provide a variety of flavors or flavors to the user. A vitamin mixture is also 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 contain aerosol forming agents such as glycerin and propylene glycol.

A liquid transfer means can transfer the liquid composition of the liquid reservoir to the heating element. For example, the liquid transfer means can be a wick such as, but not limited to, cotton fibres, ceramic fibres, glass fibres, porous ceramics.

A heating element is an element for heating the liquid composition conveyed by the liquid conveying means. For example, the heating element can be a metal hot wire, a metal hot plate, a ceramic heater, etc., but is not limited to them. The heating element may also be arranged by a structure consisting of a conductive filament, such as Nichrome wire, wound around the liquid transfer means. The heating element can be heated by an electrical current supply to transfer heat to the liquid composition in contact with the heating element to heat the liquid composition. As a result, an aerosol can be generated.

For example, vaporizer 140 is also referred to as, but is not limited to, a cartomizer or atomizer.

Meanwhile, the aerosol generator 100 may further include general-purpose components in addition to the battery 110 , controller 120 , heater 130 and 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. The aerosol-generating device 100 may also include at least one sensor (puff sensor, temperature sensor, aerosol-generating article insertion sensing sensor, etc.). In addition, the aerosol generating device 100 may be manufactured to have a structure in which external air flows in or internal gas flows out even when the aerosol generating article 200 is inserted.

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

The aerosol-generating article 200 also resembles a typical combustible cigarette. For example, the aerosol-generating article 200 can be segmented into a first portion containing an aerosol-generating substance and a second portion containing a filter or the like. Alternatively, the second portion of the aerosol-generating article 200 may also include an aerosol-generating substance. For example, granulated or encapsulated aerosol-generating substances may be inserted into the second portion.

The entire first portion can be inserted into the aerosol generator 100, and the second portion can be exposed to the outside. Alternatively, only a portion of the first portion may be inserted into the aerosol generating device 100, and the entire first portion and a portion of the second portion may be inserted. The user can inhale the aerosol with the second portion in the mouth. At this time, the aerosol is generated by the external air passing through the first portion, and the generated aerosol is transmitted to the user's mouth through the second portion.

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

FIG. 4 is a drawing showing an example of an aerosol generator using an induction heating method.

Referring to FIG. 4, the aerosol generator 100 includes a battery 110, a controller 120, a coil C and a susceptor S. Also, the cavity V of the aerosol-generating device 100 may contain at least a portion of the aerosol-generating article 200 . The aerosol-generating article 200, battery 110 and controller 120 of Figure 4 may correspond to the aerosol-generating article 200, battery 110 and controller 120 of Figures 1-3. Coil C and susceptor S may also be included in heater 13000 . Therefore, redundant description is omitted.

The aerosol generating device 100 illustrated in FIG. 4 illustrates the components according to this embodiment. Therefore, a person having ordinary knowledge in the technical field related to the present embodiment will know that the aerosol generator 100 may further include general-purpose components other than the components illustrated in FIG. If so, you will understand.

A coil C may be positioned around the cavity V. FIG. Although FIG. 4 illustrates that the coil C is arranged to surround the cavity V, it is not so limited.

Once the aerosol-generating article 200 is housed in the cavity V of the aerosol-generating device 100, the aerosol-generating device 100 can power the coil C such that the coil C generates a magnetic field. A magnetic field generated by the coil C penetrates the susceptor S, so that the susceptor S can be heated.

Such induction heating phenomenon is a well-known phenomenon explained by Faraday's Law of induction. Specifically, when the magnetic induction within the susceptor S changes, an electric field is generated within the susceptor S, causing an eddy current to flow within the susceptor. Eddy currents generate heat within the susceptor S that is proportional to the current density and conductor resistance.

The susceptor S may be heated by the eddy currents and the aerosol-generating material in the aerosol-generating article 200 may be heated by the heated susceptor S to generate an aerosol. Aerosol generated from the aerosol-generating material passes through the aerosol-generating article 200 and is transmitted to the user.

Battery 110 may provide power so that coil C may generate a magnetic field. The controller 120 may be electrically connected to the coil (C).

Coil C is also an electrically conductive coil that generates a magnetic field with power supplied from battery 110 . A coil C may be arranged to surround at least a portion of the cavity V. As shown in FIG. A magnetic field generated by the coil C can be applied to a susceptor S located at the inner end of the cavity V. FIG.

The susceptor S is heated by being pierced by the magnetic field generated by the coil C and may contain metal or carbon. For example, the susceptor S may include at least one of ferrite, ferromagnetic alloy, stainless steel, and aluminum (Al).

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

If the aerosol-generating article 200 is housed in the cavity V of the aerosol-generating device 100 , the susceptor S may be positioned to surround at least a portion of the aerosol-generating article 200 . Accordingly, the heated susceptor S may increase the temperature of the aerosol-generating substance within the aerosol-generating article 200 .

Although FIG. 4 illustrates that the susceptor S is positioned to surround at least a portion of the aerosol-generating article, it is not so limited. For example, the susceptor S may include a tubular heating element, a plate heating element, a needle heating element, or a rod heating element, which can heat the interior or exterior of the aerosol-generating article 200 depending on the shape of the heating element.

Also, a plurality of susceptors S may be arranged in the aerosol generator 100 . At this time, the plurality of susceptors S may be arranged on the outside of the aerosol-generating article 200 and arranged to be inserted inside. Also, some of the plurality of susceptors S may be arranged to be inserted into the aerosol-generating article 200 and the rest may be arranged outside the aerosol-generating article 200 . Also, the shape of the susceptor S is not limited to the shape shown in FIG. 4, and may be manufactured in various shapes.

FIG. 5 is a drawing that schematically illustrates the structure of an aerosol-generating article 200 according to one 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. As shown in FIG. Specifically, first portion 210, second portion 220, third portion 230, and fourth portion 240 may each include an aerosol-generating element, a tobacco element, a cooling element, and a filter element. As an example, first portion 210 includes an aerosol-generating substance, second portion 220 includes tobacco material and a humectant, and third portion 230 cools the airflow passing through first portion 210 and second portion 220. and fourth portion 240 may include a filter material.

Referring to FIG. 5, the first portion 210, the second portion 220, the third portion 230, and the fourth portion 240 may be sequentially aligned with respect to the longitudinal direction of the aerosol-generating article 200. FIG. Here, the longitudinal direction of the aerosol-generating article 200 is also the direction in which the length of the aerosol-generating article 200 extends. For example, the longitudinal direction of the aerosol-generating article 200 is also the direction from the first portion 210 to the fourth portion 240 . Accordingly, the aerosol generated from at least one of the first portion 210 and the second portion 220 sequentially passes through the first portion 210, the second portion 220, the third portion 230, and the fourth portion 240 to form an airflow. , which allows the smoker to inhale the aerosol from the fourth portion 240 .

First portion 210 may include an aerosol-generating element. It may also contain other additives such as flavorants, humectants and/or organic acids, and may contain flavoring liquids such as menthol or humectants. Here, the aerosol-generating component may include, 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 invention is not limited to the examples given above, and the present invention may include any of the wide variety of types of aerosol-generating elements commonly known in the art.

First portion 210 may comprise an aerosol-generating substrate impregnated with an aerosol-generating element. Examples of aerosol-generating substrates include crimped sheets, and the aerosol-generating element can be included in the first portion 210 impregnated with the crimped sheet. Also, other additives such as flavors, humectants and/or organic acids and flavoring liquids may be included in the first portion 210 while being absorbed into the crimped sheet.

A crimped sheet is also a sheet made of polymeric material. For example, the polymeric material may include at least one of paper, cellulose acetate, lyocell, and polylactic acid. For example, a crimped sheet is also a paper sheet that does not generate an offensive odor due to heat even when heated to a high temperature. However, it is not limited to this.

The first portion 210 can extend from the end of the aerosol-generating article 200 to about 7-20 mm, and the second portion 220 can extend from the end of the first portion 210 to about 7-20 mm. However, it is not necessarily limited to such a numerical range, and the extending lengths of the first portion 210 and the second portion 220 can be appropriately adjusted within a range that can be easily changed by ordinary engineers.

Second portion 220 may include tobacco elements. A tobacco element is also a particular form of tobacco material. For example, the tobacco element can have the form of cut tobacco, tobacco particles, tobacco sheets, tobacco beads, tobacco granules, tobacco powder, or tobacco extract. . The tobacco material may also include, for example, one or more of tobacco leaves, tobacco veins, puffed tobacco, cut tobacco, flat leaf tobacco, and reconstituted tobacco.

Third portion 230 may cool the airflow passing through first portion 210 and second portion 220 . The third part 230 is made of polymer or biodegradable polymer and can have a cooling function. For example, the third portion 230 can be made of polylactic acid (PLA) fibers, but is not so limited. Alternatively, the third portion 230 is made of a cellulose acetate filter with a plurality of holes formed therein. However, the third portion 230 is not limited to the examples given above, and any substance that performs the cooling function of the aerosol can apply to it without limitation. For example, the third portion 230 can also be a hollow containing tube filter or paper tube.

Fourth portion 240 may include a filter element. For example, fourth portion 240 is also a cellulose acetate filter. On the other hand, the shape of the fourth portion 240 is not limited. For example, the fourth portion 240 may be a cylindrical rod or a tubular rod containing a hollow inside. The fourth portion 240 is also a recessed rod. If the fourth portion 240 is composed of multiple segments, at least one of the multiple segments is also fabricated with a different shape.

The fourth portion 240 is also made flavor-generating. For example, the fourth part 240 may be sprayed with a perfumed liquid, and a separate fiber coated with the perfumed liquid may be inserted into the fourth part 240 .

Aerosol-generating article 200 may include wrapper 250 surrounding at least a portion of first portion 210-fourth portion 240 . The aerosol-generating article 200 may also include a wrapper 250 that wraps around any of the first through fourth portions 210-240. The wrapper 250 is positioned at the outermost portion of the aerosol-generating article 200, and the wrapper 250 may be a single wrapper or a combination of multiple wrappers.

As an example, the first portion 210 of the aerosol-generating article 200 comprises a crimped, crumpled sheet comprising an aerosol-generating material and the second portion 220 comprises cut tobacco as the tobacco material and glycerin as the humectant. , the third portion 230 may comprise a paper tube, and the fourth portion 240 may comprise cellulose acetate (CA) fibers, although the invention is not necessarily limited thereto.

The fourth portion 240 of the aerosol-generating article 200 is described in greater detail below.

As previously described, fourth section 240 includes a filter element comprising cellulose acetate tow having a denier per filament of 17-29 and a total denier of 10,000-40,000. It's okay.

Cellulose acetate tow refers to articles made from cellulose acetate suitable for making filters for aerosol-generating articles. It is a fine fiber of cellulose acetate, and the thickness of the cellulose acetate fiber affects physical factors such as suction resistance, hardness and circumference of the aerosol-generating article. Cellulose acetate tow used in existing common combustion cigarette filters has a denier of 3.0 to 6.0 per filament, and cellulose acetate tow used in commercial heated cigarette filters. can generally have a denier per filament of 9.0.

The cellulose acetate tow included in the filter elements according to the embodiments has denier per filament and total denier that are greater than cellulose acetate tow applied to existing typical heated cigarettes. The larger the denier per filament of the fibers constituting the cellulose acetate tow, the thicker the fiber thickness. are formed, the suction resistance in the filter and the ability to remove aerosols may decrease. Therefore, use of a filter including cellulose acetate tow according to the embodiments has the effect of increasing the amount of atomization transferred to the user.

Desirably, the cellulose acetate tow has a denier per filament of 18-23 and may have a total denier of 15,000-35,000, while reducing draw resistance and aerosol removal capacity within the filter. Also, it has the effect of improving the user's satisfaction with smoking, such as a feeling of absorption, a harmonious taste, stimulation, and a feeling of satisfaction during smoking.

According to an embodiment, the fourth portion 240 can include 320-510 mg of cellulose acetate tow. Because the fourth portion 240 of the example aerosol-generating article 200 includes cellulose acetate tow having a relatively large fiber thickness, it is loaded with a greater amount of tow than existing cellulose acetate tow having a relatively small fiber thickness. A low suction resistance can be maintained even if Including more cellulose acetate tow in the fourth portion 240 of the aerosol-generating article 200 may improve the circularity and hardness of the fourth portion 240 . For example, the fourth portion 240 of an example aerosol-generating article 200 can have a circularity of 93% or greater and a hardness of 95% or greater.

Roundness means whether the cross section of the fourth portion 240 is round or not, and can be measured using a known technique. For example, after the central portion of the fourth portion 240 is supported, the fourth portion 240 is rotated and measured with a comparator or the like, and the radius error can be obtained according to the movement of the measurer.

The hardness is a physical property related to the elasticity and resilience of the fourth portion 240, and means the extent to which the fourth portion 240 resists pressure applied in the vertical direction of the longitudinal direction. When the user uses the aerosol-generating article, the aerosol-generating article needs to maintain a certain level of hardness or more so that the aerosol-generating article retains its shape and is easy to use.

If the aerosol-generating article 200 contains less than 320 mg of cellulose acetate tow, a recess phenomenon occurs in which the cellulose acetate tow located in the central portion of the cross-section of the fourth portion 240 is pushed into the fourth portion 240 in the longitudinal direction. If the aerosol-generating article 200 contains more than 510 mg of cellulose acetate tow, the dosage of cellulose acetate tow is too high and the packaging with the wrapper 250 is unsatisfactory or the wrapper 250 is damaged resulting in repeated suction resistance. , the standard deviation of the results was too high, making it difficult to provide uniform performance.

The circumference of the cross-section perpendicular to the longitudinal direction of the aerosol-generating article 200 of the fourth portion 240 is 14-25 mm. As noted above, the example aerosol-generating article 200 may include cellulose acetate tow having a relatively large fiber thickness, which may result in improved hardness. The circumference range corresponds to a small value compared to the circumference of the cross-section of the aerosol-generating article 200 in general. Even if the thickness of the fourth portion 240 and the aerosol-generating article 200, ie, the circumference of the cross-section, is reduced, there is an advantage that usability can be ensured by maintaining the shape due to improved hardness.

The suction resistance of the fourth portion 240 is also between _0.5mmH2O and _2.5mmH2O . Fourth portion 240 of example aerosol-generating article 200 includes cellulose acetate tow having a relatively large fiber thickness, and thus can provide low draw resistance. A suction resistance within the above range can provide a user with a satisfying feeling when using the aerosol-generating article 200 without applying excessive force to the suction of the aerosol. In addition, the aerosol-generating article 200 according to the embodiment not only has a low suction resistance, but also maintains a hardness that ensures usability due to the tow containing thick fibers.

The tensile strength of the cellulose acetate tow is also less than about 3.5 kgf, and more desirably less than or equal to about 3.0 kgf. The cellulose acetate tow according to the example can improve productivity in a range of tensile strength of less than about 3.5 kgf due to the thickness of relatively thick fibers. When the tensile strength of the cellulose acetate tow is about 3.5 kgf or more, the thickness of the thick fibers makes it difficult to fold the tow during the crimping process, making mass production difficult.

The second portion 220 further comprises an aerosol-generating component, and the second portion 220 may comprise 10% or less of the aerosol-generating component, based on the dry weight of the aerosol-generating substrate. Also, the first portion 210 comprises 65-95% by weight of the aerosol-generating component, based on the dry weight of the aerosol-generating substrate. Because filters including cellulose acetate tow according to the embodiments have low aerosol removal capabilities, even though the first and second portions 210 and 220 contain relatively small amounts of aerosol-generating elements, sufficient atomization and It has the effect of providing a feeling of satisfaction.

The second portion 220 further includes an aerosol-generating element in that it can further improve the degree of smoking satisfaction, such as the user's sense of suckiness, harmonious taste, stimulation, and satisfaction during smoking, and the second portion 220: 3% or less by weight of the aerosol-generating component, based on the dry weight of the aerosol-generating substrate. Also, the first portion 210 comprises 65-80% by weight of the aerosol-generating component, based on the dry weight of the aerosol-generating substrate.

Example 1. Cellulose Acetate Tow Cellulose acetate tow was produced having a denier per filament of 20.0 and a total denier of 25,000.

Example 2. Filters Containing Cellulose Acetate Tow Filters containing the cellulose acetate tow of Example 1 were prepared under conditions as shown in Table 1 below. The manufactured filters were classified into Examples 2-1, 2-2, 2-3 and 2-4, respectively, depending on the weight of cellulose acetate tow contained in the filter (415 mg, 380 mg, 350 mg and 506 mg). named. The wrapper used to manufacture the filter used ordinary wrapping paper with a basis weight of 75 g/m ² and used triacetin as a plasticizer.

In addition, the quality of the filter cross section and the quality of work in the manufacturing process of the filter were evaluated. Here, the filter cross-section quality is an evaluation as to whether or not the cross-section is formed uniformly in the process of cutting the filter. It is an evaluation as to whether or not it has been advanced. As shown in Table 2, in the case of Example 2-3 in which the tow weight was 350 mg, 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. The amount of input was excessively small, and the wrapping condition using the trumpet was unsatisfactory. In addition, in the case of Example 2-4 in which the tow weight was 506 mg, a uniform filter cross section was not formed, the amount of cellulose acetate tow input was excessively large, and packaging using a wrapper was unsatisfactory. .

Comparative example 1. Cellulose Acetate Tow Commercial cellulose acetate tow used in heated cigarette filters was used.

Comparative example 2. Filter Containing Cellulose Acetate Tow A filter containing cellulose acetate tow of Comparative Example 1 was produced under the conditions shown in Table 2 below. Also, in the same manner as in Examples 2-1 to 2-4, the quality of the filter cross section and the quality of workability were evaluated during the manufacturing process of the filter, and the results are shown in Table 2 below.

Experimental example 1. Suction Resistance and Physical Performance Evaluation of Filters Containing Cellulose Acetate Tow The suction resistance, circularity and hardness of the filters of Examples 2-1 to 2-4 and Comparative Example 2 were evaluated, and the results are shown in the table below. 3.

As shown in Table 3, the suction resistances of Examples 2-1 and 2-2 are 106.3 and 88.1 mmH ₂ O, respectively, which are smaller values than the suction resistance of Comparative Example 2. On the other hand, it was confirmed that the roundness and hardness of Examples 2-1 and 2-2 were maintained at levels similar to those of Comparative Example 2. On the other hand, Examples 2-3 and 2-4 had suction resistance that was proportional to the weight of the tow put in. In addition, as expected in the evaluation of filter cross-sectional quality and workability, the roundness was reduced, and the wrapper packaging was defective, so the hardness could not be measured.

Experimental example 2. Aerosol Migration Analysis The filters of Example 2-1, Example 2-2, and Comparative Example 2 were used to produce aerosol-generating articles. The amount of nicotine, propylene glycol (PG), glycerin (Gly), and water contained in the aerosol transferred through the manufactured aerosol-generating article and the amount of each component remaining on the filter after smoking are measured, and the measurement results are Substituted into the following formula 1 to calculate the removal ability of the filter.

[Number 1]
Removability (%) = (filter residual amount after smoking) / (aerosol migration amount + filter residual amount after smoking) x 100

Two types of aerosol-generating articles were manufactured to include different structures, and the results of aerosol migration analysis of the two types of manufactured aerosol-generating articles are shown in Tables 4 and 5 below, respectively.

As shown in Tables 4 and 5, the aerosol components of the filtered aerosol-generating articles of Examples 2-1 and 2-2 compared to the filtered aerosol-generating articles of Comparative Example 2 It was confirmed that the migration amount was generally improved.

Experimental example 3. Sensory Evaluation of Aerosol-Generating Articles Sensory evaluation was carried out on 20 adults who used the aerosol-generating articles containing the filters of Example 2-1 and Comparative Example 2. Two aerosol-generating articles were prepared as in Example 2. In the sensory evaluation, a total of 6 items such as absorbency, suction power, harmonious taste, atomization amount, irritation and feeling of satisfaction were evaluated. After completion, the score for each item was recorded. The average values for each item are shown in Tables 6 and 7 below, respectively, according to the type of aerosol-generating article.

As shown in Tables 6 and 7, the aerosol-generating article containing the filter of Example 2-1 provided higher atomization and less suction power than the aerosol-generating article containing Comparative Example 2. It was confirmed.

Those skilled in the art related to the present embodiment will understand that it can be embodied in modified forms without departing from the essential characteristics described above. Accordingly, the disclosed method should be considered in an illustrative rather than a restrictive perspective. The scope of the invention is indicated in the appended claims rather than in the foregoing description, and all differences that come within the scope of equivalents thereof are to be construed as included in the present invention.

Claims (14)

In an aerosol-generating article,
a first portion comprising an aerosol-generating substrate impregnated with an aerosol-generating element;
a second portion comprising tobacco elements;
a third portion including a cooling element;
a fourth portion including a filter element;
the first portion, the second portion, the third portion, and the fourth portion are sequentially aligned with respect to the longitudinal direction of the aerosol-generating article;
An aerosol-generating article wherein said filter element has a denier per filament of 17-29 and comprises cellulose acetate tow having a total denier of 10,000-40,000. 2. The aerosol-generating article of claim 1, wherein the cellulose acetate tow has a denier per filament of 18-23 and a total denier of 15,000-35,000. 3. The aerosol-generating article of claim 1 or 2, wherein said fourth portion comprises 320-510 mg of cellulose acetate tow. An aerosol-generating article according to any one of the preceding claims, wherein the fourth portion has a cross-sectional circumference perpendicular to the longitudinal direction of the aerosol-generating article of between 14 and 25 mm. The aerosol-generating article of any one of claims 1-4, wherein the suction resistance of the fourth portion is between 0.5 and 2.5 _mmH2O . said second portion further comprising said aerosol-generating component;
6. The aerosol-generating article of any one of claims 1-5, wherein the second portion comprises no more than 10% by weight of the aerosol-generating component, based on the dry weight of the aerosol-generating substrate. The aerosol-generating article of any one of claims 1-6, wherein the first portion comprises 65-95% by weight of the aerosol-generating component, based on the dry weight of the aerosol-generating substrate. A filter included in an aerosol-generating article, comprising:
A filter comprising cellulose acetate tow having a denier per filament of 17-29 and having a total denier of 10,000-40,000. 9. The filter of claim 8, wherein the cellulose acetate tow has a denier per filament of 18-23 and a total denier of 15,000-35,000. A filter according to claim 8 or 9, wherein said filter comprises 350-510 mg of said cellulose acetate tow. A filter according to any one of claims 8 to 10, wherein the circumference of the cross section of the filter perpendicular to the longitudinal direction of the filter is 14 to 25 mm. The filter according to any one of claims 8 to 11, wherein the suction resistance of said filter is 0.5 to 2.5 _mmH2O . Cellulose acetate tow having a denier per filament of 17-29 and a total denier of 10,000-40,000. 14. The cellulose acetate tow of claim 13, wherein the cellulose acetate tow has a denier per filament of 18-23 and a total denier of 15,000-35,000.

Images