JP7359513B2 - Aerosol-generating articles containing thermally conductive substances - Google Patents

Description

The present invention relates to aerosol generating articles containing thermally conductive materials.

Recently, there has been an increasing demand for alternative methods that overcome the shortcomings of common cigarettes. For example, there is an increasing demand for systems that generate aerosols by heating cigarettes or aerosol-generating materials using an aerosol-generating device, rather than by burning cigarettes to generate aerosols.

On the other hand, in a system for heating cigarettes and generating aerosols, it is necessary to increase the heat transfer efficiency during the process of heating cigarettes in order to provide a rich amount of aerosols to the user and provide an optimal smoking experience. There is.

Various embodiments of the present invention provide aerosol generating articles containing thermally conductive materials. The technical problems to be solved by the present invention are not limited to the above technical problems, and other technical problems can be inferred from the following examples.

Various embodiments include a tobacco media portion made from a mixture comprising tobacco powder and a thermally conductive powder, the mixture providing an aerosol-generating article comprising less than 20% by weight of the thermally conductive powder on a dry weight basis. can do.

The present invention can provide an aerosol generating article containing a thermally conductive material. Specifically, an aerosol-generating article according to the present invention includes a tobacco media portion made from a mixture comprising tobacco powder and a thermally conductive powder. By including a thermally conductive material in the tobacco medium portion, heat transfer efficiency during heating of the aerosol-generating article may be increased. This may provide a richer amount of aerosol to the user and reduce the time required for preheating and battery power drain.

However, if the tobacco medium contains an excessive amount of thermally conductive material, the heating of the aerosol-generating article may cause the temperature of the tobacco medium to rise above the level intended by the preset temperature profile. An excessive heat sensation may be transmitted to the user. According to the experimental results described later with reference to FIGS. 6 to 8, when the thermally conductive powder contained in the mixture is 20% by weight or more on a dry weight basis, an excessive heat sensation is transmitted to the user during the initial puff section. It has been confirmed that this will happen. Thereby, the mixture for producing the tobacco media portion of the aerosol-generating article according to the invention contains less than 20% by weight, on a dry weight basis, of thermally conductive powder. Accordingly, the temperature of the tobacco medium can be controlled to the intended level by the preset temperature profile while increasing the heat transfer efficiency during the heating of the aerosol generating article.

It 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 in which an aerosol generating article is inserted into an aerosol generating device. It 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 in which an aerosol generating article is inserted into an aerosol generating device. 1 is a diagram illustrating an aerosol-generating article according to an exemplary embodiment. 1 is a drawing related to an experiment to determine an appropriate content of thermally conductive powder. 1 is a drawing related to an experiment to determine an appropriate content of thermally conductive powder. 1 is a drawing related to an experiment to determine an appropriate content of thermally conductive powder. FIG. 2 is a cross-sectional view illustrating the distribution of thermally conductive powder within a tobacco medium according to an exemplary embodiment; FIG. 2 is a cross-sectional view illustrating the distribution of thermally conductive powder within a tobacco medium according to an exemplary embodiment;

An aerosol-generating article according to one aspect of the invention includes a tobacco media portion made from a mixture comprising tobacco powder and a thermally conductive powder, said mixture comprising less than 20% by weight of the thermally conductive powder on a dry weight basis. .

As an example, the mixture may include 30% to 80% by weight of tobacco powder on a dry weight basis, and 0.1% to less than 20% by weight of thermally conductive powder.

The mixture further includes at least one of an additive, a binder, and a humectant, and the tobacco medium portion dries a slurry produced by adding and blending water to the mixture into a sheet. It can be manufactured by molding after drying.

For example, the mixture may include, on a dry weight basis, 60% to 80% tobacco powder, 5% to less than 20% thermally conductive powder, 3% to 7% additives, and 6% to 7% by weight. It may include 10% by weight binder and 5% to 12% by weight humectant.

The thermally conductive powder may include aluminum powder.

In one embodiment, when the aerosol-generating article is heated by heat transferred from outside the tobacco media, the thermally conductive powder is more densely packed closer to the longitudinal axis of the tobacco media. Can be distributed.

In another embodiment, when the aerosol-generating article is heated by heat transferred from inside the tobacco media, the thermally conductive powder has a higher density the farther from the longitudinal axis of the tobacco media. can be distributed in

In one example, the aerosol-generating article includes: an aerosol-generating section disposed upstream of the tobacco medium section and including a sheet of non-tobacco material coated with a humectant; a disposed downstream of the tobacco medium section; and a cooling unit that cools aerosol generated from at least one of the tobacco medium units; and a filter unit disposed downstream of the cooling unit.

An aerosol generation system according to another aspect of the invention includes a tobacco media portion made from a mixture comprising tobacco powder and a thermally conductive powder, said mixture comprising less than 20% by weight of the thermally conductive powder on a dry weight basis. and an aerosol generation device including a heater for heating the aerosol generation article, a battery for supplying power to the heater, and a control unit for controlling power supply from the battery to the heater. .

In one embodiment, the heater may be disposed to surround the outside of the tobacco medium, and the thermally conductive powder may be more densely distributed closer to the longitudinal axis of the tobacco medium.

In another embodiment, the heater is arranged to be inserted into the tobacco medium part, and the thermally conductive powder is distributed more densely the farther from the longitudinal axis of the tobacco medium part. sell.

The terms used in the examples are selected from common terms that are currently widely used as much as possible while considering the functions of the present invention. It also varies depending on precedents, the emergence of new technology, etc. Furthermore, in certain cases, there may be terms arbitrarily selected by the applicant, in which case their meanings will be described in detail in the description of the invention. Therefore, the terms used in the present invention must be defined based on the meanings of the terms and the overall content of the present invention, rather than the simple names of the terms.

Throughout the specification, when a part is said to "include" a certain component, it does not exclude other components, and may further include other components, unless there is a specific statement to the contrary. It means that. In addition, terms such as "...unit" and "...module" described in the specification mean a unit that processes at least one function or operation, and it may be realized by hardware or software, or it may be implemented by hardware or software. It is also realized through the combination of hardware and software.

Throughout the specification, "upstream" and "downstream" may be determined based on the direction in which air flows when a user smokes using an aerosol-generating article. For example, when a user smokes using the aerosol generating article shown in FIG. , is transmitted to the user through the filter section 240, so the aerosol generating section 210 or the tobacco medium section 220 is located "upstream" of the filter section 240. On the other hand, a person skilled in the art would easily understand that "upstream" and "downstream" are relative depending on the relationship between components.

Additionally, throughout the specification, "longitudinal direction" can mean a direction from an upstream end to a downstream end of an aerosol-generating article, or vice versa. For example, when it is assumed that the aerosol generating article includes the aerosol generating section 210, the tobacco medium section 220, the cooling section 230, and the filter section 240 in the listed order, the longitudinal direction is the direction from the aerosol generating section 210 toward the filter section 240, or It's also the opposite direction.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in a manner that can be easily carried out by a person having ordinary knowledge in the technical field to which the present invention pertains. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein.

Embodiments of the present invention will be described in detail below based on the drawings.

1 to 4 are drawings showing an example in which an aerosol generating article is inserted into an aerosol generating device.

Referring to FIG. 1, an aerosol generation device 10000 includes a battery 11000, a control unit 12000, and a heater 13000. Referring to FIGS. 2 and 3, the aerosol generation device 10000 further includes a vaporizer 14000. Referring to FIG. 4, the aerosol generation device 10000 further includes an induction coil 13500. Further, an aerosol generating article 20000 can be inserted into the internal space of the aerosol generating device 10000. Aerosol generation device 10000 and aerosol generation article 20000 can constitute an aerosol generation system.

In the aerosol generation device 10000 illustrated in FIGS. 1 to 4, components related to this embodiment are illustrated. Therefore, a person with ordinary knowledge in the technical field related to this embodiment would know that the aerosol generation device 10000 further includes other general-purpose components in addition to the components illustrated in FIGS. 1 to 4. If so, you will understand.

Furthermore, although FIGS. 2 and 3 illustrate that the aerosol generation device 10000 includes the heater 13000, the heater 13000 may be omitted if necessary.

FIG. 1 shows that a battery 11000, a control unit 12000, and a heater 13000 are arranged in a line. Further, FIG. 2 shows that a battery 11000, a control unit 12000, a vaporizer 14000, and a heater 13000 are arranged in a line. Further, FIG. 3 shows that the vaporizer 14000 and the heater 13000 are arranged in parallel. Further, FIG. 4 shows that the induction coil 13500 is arranged to cover the heater 13000. However, the internal structure of the aerosol generation device 10000 is not limited to that illustrated in FIGS. 1 to 4. That is, the arrangement of the battery 11000, control unit 12000, heater 13000, induction coil 13500, and vaporizer 14000 may be changed depending on the design of the aerosol generation device 10000.

When the aerosol generating article 20000 is inserted into the aerosol generating device 10000, the aerosol generating device 10000 operates the heater 13000 and/or the vaporizer 14000 to generate an aerosol from the aerosol generating article 20000 and/or the vaporizer 14000. sell. Aerosol generated by heater 13000 and/or vaporizer 14000 passes through aerosol generating article 20000 and is transmitted to a user.

If necessary, the aerosol generating device 10000 can heat the heater 13000 even when the aerosol generating article 20000 is not inserted into the aerosol generating device 10000.

Battery 11000 supplies electric power used to operate aerosol generation device 10000. For example, the battery 11000 can supply power so that the heater 13000 or the evaporator 14000 is heated, and can supply the power necessary for the operation of the control unit 12000. Further, the battery 11000 can supply power necessary for operating the display, sensor, motor, etc. provided in the aerosol generation device 10000.

The control unit 12000 generally controls the operation of the aerosol generation device 10000. Specifically, the control unit 12000 controls the operation of not only the battery 11000, the heater 13000, the induction coil 13500, and the vaporizer 14000, but also other components included in the aerosol generation device 10000. Further, the control unit 12000 can also check the status of each component of the aerosol generation device 10000 and determine whether the aerosol generation device 10000 is in an operable state.

Control unit 12000 includes at least one processor. A processor is implemented as an array of a large number of logic gates, and may also be implemented as a combination of a general-purpose microprocessor and a memory in which a program that can be executed by the microprocessor is stored. Further, those with ordinary knowledge in the technical field to which this embodiment pertains will understand that the control unit 12000 can be implemented by different types of hardware.

The heater 13000 can be heated by power supplied from the battery 11000. However, this is not necessarily the case. Heater 13000 may be heated by a variable magnetic field generated from induction coil 13500. In that case, the induction coil 13500 may generate a variable magnetic field using power supplied from the battery 11000.

For example, as illustrated in FIG. 1, when the aerosol generating article 20000 is inserted into the aerosol generating device 10000, the heater 13000 may be located inside the aerosol generating article 20000. Thus, the heated heater 13000 may be in direct contact with the aerosol-generating material within the aerosol-generating article 20000 and may increase the temperature of the aerosol-generating material.

As another example, when the aerosol generating article 20000 is inserted into the aerosol generating device 10000 as illustrated in FIGS. 2 to 4, the heater 13000 may be located outside the aerosol generating article 20000. Therefore, heat generated from the heater 13000 can be transferred from the outside of the aerosol-generating article 20000 to the aerosol-generating material inside.

As an example, as illustrated in FIGS. 1-3, heater 13000 is also an electrically resistive heater. For example, heater 13000 may include electrically conductive tracks, and by passing a current through the electrically conductive tracks, heater 13000 may be heated. However, the heater 13000 is not limited to the example described above, and can be used without any restriction as long as it can heat up to a desired temperature. Here, the desired temperature may be preset in the aerosol generation device 10000, or may be set to a desired temperature by the user.

As another example, as illustrated in FIG. 4, heater 13000 is also an induction heater. The aerosol generation device 13000 may further include an induction coil 13500 for heating the aerosol generation article 20000 using an induction heating method. The induction coil 13500 may generate a variable magnetic field by being supplied with power from the battery 11000, and the heater 13000 may include a susceptor that is heated by being penetrated by the variable magnetic field. The susceptor may include metal or carbon. For example, the susceptor may include at least one of ferrite, ferromagnetic alloy, stainless steel, and aluminum (Al).

The susceptor may also be made of ceramics such as graphite, molybdenum, silicon carbide, niobium, nickel alloy, metal film, zirconia, etc. It may contain at least one of transition metals such as nickel (Ni) and cobalt (Co), and semimetals such as boron (B) and phosphorus (P). However, the susceptor included in the heater 13000 is not limited to the example described above, and can be used without any restriction as long as it can be heated to a desired temperature by applying a variable magnetic field.

The heater 13000 includes a tubular heating element, a plate heating element, a needle heating element, or a rod heating element, and depending on the shape of the heating element, can heat the inside or outside of the aerosol generating article 20000.

Further, a plurality of heaters 13000 may be arranged in the aerosol generation device 10000. At this time, the plurality of heaters 13000 may be inserted into the aerosol generating article 20000 or may be disposed outside the aerosol generating article 20000. Further, a part of the plurality of heaters 13000 may be placed inside the aerosol generating article 20000, and the rest may be placed outside the aerosol generating article 20000. Further, the shape of the heater 13000 is not limited to the shapes illustrated in FIGS. 1 to 4, and may be manufactured in various shapes.

The vaporizer 14000 heats the liquid composition to generate an aerosol, and the generated aerosol can be transmitted to a user through an aerosol-generating article 20000. That is, the aerosol generated by the vaporizer 14000 moves along the airflow path of the aerosol generation device 10000, and the airflow path allows the aerosol generated by the vaporizer 14000 to pass through the aerosol generation article and be transmitted to the user. may be configured to be

For example, the vaporizer 14000 may include, but is not limited to, a liquid storage, a liquid transfer means, and a heating element. For example, the liquid storage, liquid transfer means, and heating element are included in the aerosol generation device 10000 as independent modules.

The liquid storage section can store a liquid composition. For example, the liquid composition may be a liquid containing tobacco-containing materials, including volatile tobacco flavor components, or a liquid containing non-tobacco materials. The liquid reservoir can be made to be detached/deposited from/to the vaporizer 14000, and can also be made integral with the vaporizer 14000.

For example, liquid compositions may include water, solvents, ethanol, plant extracts, fragrances, flavors, or vitamin mixtures. Flavoring agents may include, but are not limited to, menthol, peppermint, spearmint oil, various fruit flavor components, and the like. Flavoring agents may include ingredients that provide a variety of flavors or flavors to the user. The vitamin mixture is a mixture of at least one of vitamin A, vitamin B, vitamin C, and vitamin E, but is not limited thereto. The liquid composition may also include aerosol formers such as glycerin and propylene glycol.

The liquid transfer means is capable of transferring the liquid composition of the liquid reservoir to the heating element. For example, it can be a liquid transfer medium, a wick such as, but not limited to, cotton fibers, ceramic fibers, glass fibers, porous ceramics.

The heating element is an element for heating the liquid composition transferred by the liquid transfer means. For example, the heating element can be, but is not limited to, a metal hot wire, a metal hot plate, a ceramic heater, etc. The heating element may also be arranged by a structure consisting of a conductive filament, such as a nichrome wire, wrapped around the liquid transfer means. The heating element can be heated by the electrical current supply and transfer heat to the liquid composition contacted with the heating element to heat the liquid composition. As a result, aerosols may be generated.

For example, the vaporizer 14000 may also be referred to as, but not limited to, a cartridge, cartomizer, or atomizer.

On the other hand, the aerosol generation device 10000 may further include a general-purpose configuration other than the battery 11000, the control unit 12000, the heater 13000, the induction coil 13500, and the vaporizer 14000. For example, the aerosol generating device 10000 may include a display capable of outputting visual information and/or a motor for outputting tactile information. Further, the aerosol generation device 10000 may include at least one sensor (puff sensing sensor, temperature sensing sensor, cigarette sensing sensor, etc.). Further, the aerosol generating device 10000 is also manufactured with a structure that allows external air to flow in or internal gas to flow out even when the aerosol generating article 20000 is inserted.

Although not shown in FIGS. 1 to 4, the aerosol generation device 10000 may constitute a system together with a separate cradle. For example, the cradle can be used to charge the battery 11000 of the aerosol generation device 10000. Alternatively, the heater 13000 may be heated while the cradle and the aerosol generation device 10000 are combined.

Aerosol generating article 20000 also resembles a typical combustible cigarette. For example, the aerosol-generating article 20000 can be divided into a first part containing an aerosol-generating substance and a second part including a filter and the like. Alternatively, the second portion of aerosol-generating article 20000 also includes an aerosol-generating material. For example, an aerosol-generating material in the form of granules or capsules can be inserted into the second part.

The entire first portion may be inserted into the aerosol generating device 10000, and the second portion may be exposed to the outside. Alternatively, only a portion of the first portion may be inserted into the aerosol generating device 10000, and the entire first portion and a portion of the second portion may be inserted. The user may inhale the aerosol while holding the second portion in their mouth. At this time, the aerosol is generated by the external air passing through the first part, and the generated aerosol is transmitted to the user's mouth by passing through the second part.

For example, external air may be introduced through at least one air passage formed in the aerosol generating device 10000. For example, the opening and closing of the air passage formed in the aerosol generating device 10000 and/or the size of the air passage can also be adjusted by the user. Thereby, the amount of atomization, the feeling of smoking, etc. can also be adjusted by the user. As another example, external air may be introduced into the aerosol-generating article 20000 through at least one hole formed on the surface of the aerosol-generating article 20000.

FIG. 5 is a diagram illustrating an aerosol generating article according to an exemplary embodiment.

Referring to FIG. 5, the aerosol generating article 20000 may include an aerosol generating section 210, a tobacco medium section 220, a cooling section 230, a filter section 240, and a wrapper 250. The first part may include the aerosol generating part 210 and the tobacco medium part 220, and the second part may include the cooling part 230 and the filter part 240.

Aerosol generation section 210 is disposed upstream of tobacco media section 220 and may include a sheet of non-tobacco material coated with a humectant. Humectants can be compatible with aerosol-generating substances. For example, the humectant may include, but is not limited to, at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. A non-tobacco material is a material that is not a tobacco material and is also a polymeric or cellulosic material that is capable of absorbing humectants. For example, a sheet of non-tobacco material may also be a paper sheet that does not generate heat-induced off-odors even when heated to high temperatures. However, it is not limited thereto.

On the other hand, the aerosol generating section 210 may include a sheet that is wrinkled by being crimped or compressed, or may include a sheet that is rolled without being crimped. However, without being limited thereto, the aerosol generator 210 may include a sheet of non-tobacco material having any suitable form. The aerosol generator 210 contains other additives such as flavoring agents, wetting agents, and the like. For example, a scented liquid such as menthol or a humectant can be added by being sprayed onto the aerosol generating section 210 .

The tobacco media portion 220 may be manufactured from a mixture including tobacco powder and thermally conductive powder. The mixture further includes at least one of an additive, a binder, and a humectant, and the tobacco medium section 220 dries a slurry produced by adding and blending water to the mixture into a sheet shape, and then It can be manufactured by a molding method. For example, the mixture may include tobacco powder, a thermally conductive metal powder (e.g., aluminum), a non-tobacco fiber additive (e.g., pulp) and an extrinsic binder (e.g., guar gum) as solid powders, and a humectant (e.g., glycerin). ) may further be included.

The tobacco medium part 220 may be shaped in various ways. For example, the tobacco medium portion 220 may also be made of the sheet itself. In that case, the tobacco medium portion 220 is crimped or squeezed to create a wrinkled sheet, and even in the uncrimped state it is rolled. The tobacco medium portion 220 is made in the form of a strand of cut sheets, or may also be made of shredded tobacco, in which the sheet is cut into small pieces.

Meanwhile, by including a thermally conductive material (eg, thermally conductive powder) in the tobacco medium portion 220, heat transfer efficiency in the process of heating the aerosol-generating article 20000 may be increased. This may provide a richer amount of aerosol to the user and reduce the time required for preheating and battery power drain.

However, if the tobacco medium portion 220 contains an excessive amount of thermally conductive material, the temperature of the tobacco medium portion 220 may rise higher than the level intended by the preset temperature profile while the aerosol generating article 20000 is being heated. As a result, an excessive heat sensation may be transmitted to the user. Therefore, tobacco medium portion 220 needs to include a modest amount of thermally conductive material. Hereinafter, an appropriate content of the thermally conductive powder will be described with reference to FIGS. 6 to 8.

6 to 8 are drawings related to experiments to determine the appropriate content of thermally conductive powder.

Referring to the table of FIG. 6, the blending ratio of the mixture corresponding to each aerosol generating article used in the experiment is listed. In the experiment, aluminum (AL) powder was used as the thermally conductive powder, pulp was used as the additive, guar gum was used as the binder, and glycerin was used as the humectant.

Aerosol generating article C comprises a tobacco material portion made from a mixture consisting of 80% by weight tobacco raw material, 5% by weight pulp, 8% by weight guar gum and 7% by weight glycerin. Aerosol-generating article C corresponds to a control group that does not contain thermally conductive powder.

Aerosol generating article A5 is manufactured from a mixture consisting of 75% by weight Tava raw material, 5% by weight aluminum powder, 5% by weight pulp, 8% by weight guar gum and 7% by weight glycerin on a dry weight basis. Contains tobacco substance part.

Aerosol generating article A10 is manufactured from a mixture consisting of 70% tobacco raw material, 10% aluminum powder, 5% pulp, 8% guar gum and 7% glycerin by weight on a dry weight basis. Contains tobacco substance part.

Aerosol generating article A15 is manufactured from a mixture consisting of 65% tobacco raw material, 15% aluminum powder, 5% pulp, 8% guar gum and 7% glycerin by weight on a dry weight basis. Contains tobacco substance part.

Aerosol generating article A20 is manufactured from a mixture consisting of 60% tobacco raw material, 20% aluminum powder, 5% pulp, 8% guar gum and 7% glycerin by weight on a dry weight basis. Contains tobacco substance part.

Aerosol generating article C, aerosol generating article A5, aerosol generating article A10, aerosol generating article A15 and aerosol generating article A20 are each mixed with water having a weight corresponding to 500 when the weight of the mixture is 100. It includes a tobacco media portion manufactured from the slurry produced.

Referring to the table of FIG. 7, when the aforementioned aerosol generating articles are heated, the results of component analysis of the aerosol generated from each aerosol generating article are illustrated.

Referring to FIG. 7, as the content of aluminum powder included in the aerosol-generating article increases, the amount of smoke components such as TPM (total particulate matter), nicotine, and glycerin transferred increases. That is, by increasing the content of aluminum powder in the aerosol-generating article, a richer amount of aerosol may be provided to the user, and the time required for preheating and battery power consumption may be reduced. However, as will be described below with reference to FIG. 8, it is not necessarily desirable to have a higher content of aluminum powder.

Referring to the graph of FIG. 8, the results of measuring the temperature of the tobacco medium contained in each of the aforementioned aerosol-generating articles are illustrated when the heater is heated according to a preset temperature profile.

According to the preset temperature profile, the heater that heats the aerosol-generating article is heated to 270°C during the 0-40 second period, heated to 240°C during the 40-60 second period, and heated to 240°C during the 40-60 second period. It may be heated to 235° C. during the 80 second period, and may be heated to 230° C. during the 80 second to 280 second period. The preset temperature profile is also set so that the target temperature of the end portion of the tobacco medium portion, which does not come into contact with the heater, is 170° C. or higher.

Referring to FIG. 8, the temperatures of aerosol-generating article C, aerosol-generating article A5, aerosol-generating article A10, and aerosol-generating article A15 can be controlled to an intended level by a preset temperature profile. On the other hand, the temperature of the aerosol-generating article A20 increases excessively in the initial puff section.

In this way, if the tobacco medium contains an excessive amount (i.e., 20% by weight or more) of a thermally conductive substance, the temperature of the tobacco medium during the heating process of the aerosol-generating article may exceed the intended temperature profile according to the preset temperature profile. By rising above the level, an excessive heat sensation may be transmitted to the user. Therefore, it is desirable that the mixture for producing the tobacco medium contains less than 20% by weight of thermally conductive material.

Also, returning to FIG. 5, the mixture for making the tobacco media portion 220 of the aerosol generating article 20000 according to the present invention may include less than 20% by weight thermally conductive powder on a dry weight basis. Therefore, the temperature of the tobacco medium portion 220 can be controlled to an intended level by the preset temperature profile while increasing the heat transfer efficiency during the heating process of the aerosol generating article 20000.

For example, the mixture may include from 30% to 80% by weight tobacco powder on a dry weight basis, and from 0.1% to less than 20% thermally conductive powder. More specifically, the mixture includes, on a dry weight basis, 60% to 80% tobacco powder, 5% to less than 20% thermally conductive powder, 3% to 7% additives, 6% by weight % to 10% by weight binder, and 5% to 12% by weight humectant. However, the present invention is not necessarily limited thereto, and as long as the content of the thermally conductive powder is less than 20% by weight, the content of other materials may be changed as appropriate.

Meanwhile, the characteristics of the aerosol generated from the tobacco medium part 220 differ not only depending on the content of the thermally conductive powder contained in the tobacco medium part 220 but also depending on the distribution. Hereinafter, a desirable distribution of the thermally conductive powder will be described with reference to FIGS. 9 and 10.

9 and 10 are cross-sectional views illustrating the distribution of thermally conductive powder within the tobacco medium according to an exemplary embodiment.

Referring to FIG. 9, an illustration of the desired distribution of thermally conductive powder 910 when the aerosol-generating article is heated by heat transferred from outside of tobacco media section 220 is illustrated.

The fact that the aerosol generating article is heated by heat transferred from outside the tobacco medium section 220 means that the heater is arranged to surround the outside of the tobacco medium section 220, as illustrated in FIGS. 2 to 4. It means that. Generally, when the heater is arranged to surround the outside of the tobacco media section 220, the temperature of the central region 920 of the tobacco media section 220 will be higher than that of other regions within the tobacco media section 220 (i.e., regions other than the central region 920). lower than the temperature. Accordingly, the aerosol-generating substances contained in other regions than the central region 920 can be exhausted more quickly.

According to an exemplary embodiment, the thermally conductive powder 910 has a higher density the closer it is to the longitudinal axis of the tobacco media section 220 (i.e., the center of the tobacco media section 220 illustrated in the cross-sectional view of FIG. 9). can be distributed in Accordingly, even if the aerosol generation device used with the aerosol generation article includes an external heater, the tobacco medium portion 220 can be heated uniformly as a whole. As an example, the amount of thermally conductive powder included in the central region 920 of the tobacco media section 220 is more than twice the amount of powder included in other regions of the tobacco media section 220. However, this is not necessarily the case. Meanwhile, the central region 920 is a region corresponding to half the diameter of the tobacco medium portion 220, but is not limited thereto.

Referring to FIG. 10, an illustration of the desired distribution of thermally conductive powder 1010 when the aerosol-generating article is heated by heat transferred from within tobacco media section 220 is illustrated.

The fact that the aerosol-generating article is heated by heat transferred from inside the tobacco medium section 220 means that the heater is arranged to be inserted into the inside of the tobacco medium section 220, as illustrated in FIG. It means that. Generally, when the heater is inserted into the tobacco medium section 220, the temperature of the central region 1020 of the tobacco medium section 220 is higher than the temperature of other regions within the tobacco medium section 220. This may cause the aerosol-generating material contained in the central region 1020 to be exhausted more quickly than in other regions.

According to an exemplary embodiment, the thermally conductive powder 1010 has a higher density the farther from the longitudinal axis of the tobacco media section 220 (i.e., the center of the tobacco media section 220 illustrated in the cross-sectional view of FIG. 10). can be distributed to Accordingly, even if the aerosol generating device used with the aerosol generating article includes an internal heating type heater, the tobacco medium portion 220 can be heated uniformly as a whole. For example, the amount of thermally conductive powder 1010 contained in other regions of tobacco medium portion 220 (i.e., regions other than central region 1020) is the amount of thermally conductive powder 1010 contained in central region 1020 of tobacco medium portion 220. More than twice as many. However, this is not necessarily the case. Meanwhile, the central region 1020 corresponds to a half of the diameter of the tobacco medium part 220, but is not limited thereto.

Returning to FIG. 5, the distribution of the thermally conductive powder contained in the tobacco medium portion 220 is not necessarily limited to the examples shown in FIGS. 9 and 10. The thermally conductive powder may be uniformly distributed over the entire area of the tobacco media portion 220.

The cooling unit 230 is disposed downstream of the tobacco medium unit 220 and may cool the aerosol generated from at least one of the aerosol generating unit 210 and the tobacco medium unit 220. The cooling unit 230 is also a hollow tube filter or paper tube filter. However, the cooling unit 230 is not limited to the above example, and may be used without any limitations as long as it can perform the function of cooling the aerosol. For example, the cooling unit 230 may be made of a polymeric material or a biodegradable polymeric material. The cooling unit 230 can also be made of pure polylactic acid, but is not limited thereto. Further, the cooling unit 230 is also made of a cellulose acetate filter in which a plurality of holes are formed.

The filter section 240 is also a cellulose acetate filter placed downstream of the cooling section 230. On the other hand, the shape of the filter section 240 is not limited. For example, the filter portion 240 may be a cylindrical rod or a tubular rod having a hollow space inside. Further, the filter portion 240 is also a recessed rod. If the filter part 240 is composed of a plurality of segments, at least one of the plurality of segments is also manufactured in a different shape.

Filter portion 240 is also made to produce flavor. For example, a perfumed liquid may be sprayed onto the filter part 240, and a separate fiber coated with the perfumed liquid may be inserted into the filter part 240.

Additionally, the filter section 240 includes at least one capsule. Here, the capsule performs the function of generating flavor and can also perform the function of generating aerosol. For example, a capsule is a structure in which a liquid containing a fragrance is covered with a film. The capsule may have a spherical or cylindrical shape, but is not limited thereto.

Aerosol generating article 20000 is also packaged by wrapper 250. The wrapper 250 may have at least one hole through which external air can flow in or internal gas can flow out. Although the wrapper 250 is illustrated in FIG. 5 as a single wrapper, the wrapper 250 can also be a combination of multiple wrappers. Wrapper 250 may include a thermally conductive wrapper. For example, wrapper 250 may include an oil-resistant wrapper that includes a metal layer (eg, aluminum, copper, etc.). However, it is not necessarily limited to this.

On the other hand, although FIG. 5 illustrates that the aerosol-generating article 20000 is composed of four segments, the present invention is not limited thereto. That is, the aerosol generating article 20000 may include a smaller number of segments or a larger number of segments, and may include at least one segment that performs other functions in addition to the cooling section 230 and the filter section 240.

It should be noted that the above description of the embodiments is merely an illustrative one, and that a person having ordinary knowledge in the art can make various modifications and other equivalent embodiments. you will be able to understand. Therefore, the true scope of protection of the invention must be determined by the scope of the claims, and all differences that are equivalent to the contents of the claims are included in the scope of protection determined by the scope of the claims. must be interpreted.

Claims (9)

In an aerosol generating article,
comprising a tobacco medium made from a mixture comprising tobacco powder and a thermally conductive powder;
The mixture comprises less than 20% by weight of thermally conductive powder on a dry weight basis;
the aerosol generating article is heated by a heater disposed surrounding the exterior of the tobacco medium;
The thermally conductive powder is more densely distributed closer to the longitudinal axis of the tobacco medium. In an aerosol generating article,
comprising a tobacco medium made from a mixture comprising tobacco powder and a thermally conductive powder;
The mixture comprises less than 20% by weight of thermally conductive powder on a dry weight basis;
the aerosol-generating article is heated by a heater , the heater being inserted into the center of the tobacco medium when the aerosol-generating article is used;
The aerosol-generating article wherein the thermally conductive powder is more densely distributed farther from the longitudinal axis of the tobacco medium. 3. The aerosol-generating article of claim 1 or 2, wherein the mixture comprises 30% to 80% by weight of tobacco powder on a dry weight basis, and 0.1% to less than 20% by weight of thermally conductive powder. The mixture further includes at least one of an additive, a binder, and a humectant;
The tobacco medium portion is manufactured by a method of drying a slurry produced by adding water to the mixture and forming it into a sheet shape, and then molding the slurry. aerosol-generating articles. The mixture comprises, on a dry weight basis, 60% to 80% tobacco powder, 5% to 20% thermally conductive powder, 3% to 7% additives, and 6% to 10% by weight. 5. The aerosol-generating article of claim 4, comprising: % binder, and 5% to 12% humectant. 6. An aerosol-generating article according to any one of claims 1 to 5, wherein the thermally conductive powder comprises aluminum powder. an aerosol generating section disposed upstream of the tobacco medium section and comprising a sheet of non-tobacco material coated with a humectant;
a cooling section that is disposed downstream of the tobacco medium section and cools the aerosol generated from at least one of the aerosol generation section and the tobacco medium section;
The aerosol-generating article according to any one of claims 1 to 6, further comprising a filter section disposed downstream of the cooling section. In an aerosol generation system,
an aerosol-generating article comprising a tobacco media portion made from a mixture comprising tobacco powder and a thermally conductive powder, the mixture comprising less than 20% by weight of the thermally conductive powder on a dry weight basis;
an aerosol generation device including a heater for heating the aerosol generation article, a battery that supplies power to the heater, and a control unit that controls power supply from the battery to the heater,
The heater is arranged to surround the outside of the tobacco medium part,
The aerosol generation system, wherein the thermally conductive powder is more densely distributed closer to the longitudinal axis of the tobacco medium. In an aerosol generation system,
an aerosol-generating article comprising a tobacco media portion made from a mixture comprising tobacco powder and a thermally conductive powder, the mixture comprising less than 20% by weight of the thermally conductive powder on a dry weight basis;
an aerosol generation device including a heater for heating the aerosol generation article, a battery that supplies power to the heater, and a control unit that controls power supply from the battery to the heater,
the heater is inserted into the center of the tobacco medium when the aerosol generating article is used ;
The aerosol generation system, wherein the thermally conductive powder is more densely distributed farther from the longitudinal axis of the tobacco medium.

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