FLAVOR COMPONENT ADSORBENT AND METHOD FOR PRODUCING SAME, FLAVOR MOLDED BODY AND METHOD FOR PRODUCING SAME, HEAT-NOT-BURN FLAVOR INHALER, AND FLAVOR-GENERATING ARTICLE

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation Application of PCT Application No. PCT/JP2022/012360 filed Mar. 17, 2022, the entire contents of which are incorporated herein by reference.

FIELD

The present invention relates to a flavor component adsorbent and a method for producing the same, a flavor molded body and a method for producing the same, a heat-not-burn flavor inhaler, and a flavor-generating article.

BACKGROUND

Obtaining a flavor component-containing liquid by heating a tobacco material and dissolving a thus-generated flavor component-containing gas in a liquid, and using such a flavor component-containing liquid as a tobacco flavor source in a flavor inhaler have been known (see, for example, Patent Document 1).

CITATION LIST

Patent Literature

Patent Document 1: International Publication No. 2017/144705

SUMMARY

Technical Problem

Objects of the present invention include providing a technique for efficiently recovering flavor components from a tobacco material.

Solution To Problem

According to one aspect, there is provided a method for producing a flavor component adsorbent, comprising:

• • heating a tobacco material to vaporize flavor components from the tobacco material;
  • passing a gas containing the flavor components through water containing an adsorbent to adsorb the flavor components on the adsorbent; and
  • recovering the adsorbent that has adsorbed the flavor components.

According to another aspect, there is provided a flavor component adsorbent obtainable by the above-mentioned method.

According to further another aspect, there is provided a method for producing a flavor molded body, comprising:

• • heating a tobacco material to vaporize flavor components from the tobacco material;
  • passing a gas containing the flavor components through water containing an adsorbent to adsorb the flavor components on the adsorbent;
  • recovering the adsorbent that has adsorbed the flavor components to obtain a flavor component adsorbent; and mixing the flavor component adsorbent with a molding material and molding an obtained mixture.

According to further another aspect, there is provided a flavor molded body obtainable by the above-mentioned method.

According to further another aspect, there is provided a heat-not-burn flavor inhaler comprising:

• • a flavor source containing the above-mentioned flavor component adsorbent or the above-mentioned flavor molded body; and
  • a heater for heating the flavor source.

According to further another aspect, there is provided a flavor-generating article comprising:

• • a flavor source containing the above-mentioned flavor component adsorbent or the above-mentioned flavor molded body; and
  • a wrapping paper wrapped around the flavor source.

Advantageous Effects Of Invention

According to the present invention, a technique for efficiently recovering flavor components from a tobacco material is provided.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flowchart showing an exemplary production method for a flavor component adsorbent.

FIG. 2 is a schematic diagram showing an exemplary heating device.

FIG. 3 is a schematic diagram showing an exemplary dissolving device.

FIG. 4A is a schematic front view showing an exemplary aerosol-generating device.

FIG. 4B is a schematic top view of the aerosol-generating device shown in FIG. 4A.

FIG. 4C is a schematic bottom view of the aerosol-generating device shown in FIG. 4A.

FIG. 5 is a schematic sectional side view showing an exemplary flavor-generating article.

FIG. 6 is a sectional view of the aerosol-generating device taken along the line III-III shown in FIG. 4B.

FIG. 7 is a perspective view showing an exemplary heat-not-burn flavor inhaler.

FIG. 8 is a perspective view of a power supply unit in the heat-not-burn flavor inhaler shown in FIG. 7.

FIG. 9 is a sectional view of the heat-not-burn flavor inhaler shown in FIG. 7.

FIG. 10 is a block diagram showing a configuration of the main part of the power supply unit in the heat-not-burn flavor inhaler shown in FIG. 7.

DETAILED DESCRIPTION

The present invention will be described in detail with the intention of allowing the invention to be understood, not limiting the invention.

<1. Method for Producing Flavor Component Adsorbent>

A method for producing a flavor component adsorbent includes:

• • heating a tobacco material to vaporize flavor components from the tobacco material;
  • passing a gas containing the flavor components through water containing an adsorbent to adsorb the flavor components on the adsorbent; and
  • recovering the adsorbent that has adsorbed the flavor components.

In the present disclosure, the “adsorbent that has adsorbed the flavor components” produced by this method is referred to as a flavor component adsorbent. The flavor component adsorbent may be used in such a manner that it is incorporated into a heat-not-burn flavor inhaler (which may also be simply called a “heating-type flavor inhaler” below) as it is, or that it is processed into a molded body together with a molding material and then the obtained molded body is incorporated into a heating-type flavor inhaler.

The method for producing a flavor component adsorbent will be described with reference to FIG. 1, in the order of a <heating step (S1)>, an <adsorbent-containing water passing through step (S2)>, and a <recovering step (S3)>. FIG. 1 shows, in the form of a flowchart, one example of the method for producing a flavor component adsorbent.

<Heating Step (S1)>

The heating step (S1) heats a tobacco material to vaporize flavor components from the tobacco material. By the heating step (S1), a gas containing the flavor components is obtained (see FIG. 1).

As the “tobacco material”, cut tobacco which is ready to be incorporated into a tobacco product, such as a combustion-type or heating-type flavor inhaler, may be used. The “cut tobacco which is ready to be incorporated into a tobacco product” refers to cut tobacco which has become ready to be incorporated into a tobacco product by going through various processes including drying in a farm house, subsequent long-term aging in a leaf processing facility for one to several years, and subsequent blending and cutting in a manufacturing facility.

The cut tobacco consists of cut pieces of leaf tobacco. The cut tobacco may be any of cut pieces of stemmed leaves, cut pieces of midrib, and cut pieces of reconstituted tobacco (i.e., a tobacco material obtained by processing leaf scraps, cut tobacco scraps, midrib scraps, fine powder, etc., produced in the facility processes into a reusable form), or a mixture thereof. The cut tobacco may be pulverized and the resulting pulverized product may be applied to the heating step (S1). Use of the pulverized product of the cut tobacco as a tobacco material can realize an enhanced efficiency in recovery of flavor components from the tobacco material. This can increase the amount of adsorbed flavor components in the eventually obtained flavor component adsorbent.

As the cut tobacco, cut tobacco derived from any tobacco variety may be used, and its examples include cut tobacco derived from flue-cured tobacco, Burley tobacco, Oriental tobacco, etc. As the cut tobacco, cut tobacco derived from a single variety, or a mixture of different varieties may be used.

The heating may be conducted at a temperature of, for example, 120 to 400° C., preferably 160 to 230° C. The heating may be conducted for a period of, for example, 5 to 60 minutes, preferably 10 to 30 minutes.

For example, the heating may be conducted using a heating apparatus shown in FIG. 2. As shown in FIG. 2, this heating device 2 includes a container 2A for accommodating a tobacco material 2D, a sintered plate 2B arranged at the bottom of the container 2A, a preheater 2C for heating air sent to the container 2A, an air flow path 2E for sending air to the container 2A, a gas flow path 2F for discharging a gas generated by heating the tobacco material 2D from the container 2A, and an oven (not shown in the figure) for accommodating the container 2A.

A heating operation will be described. First, the tobacco material 2D is put in the container 2A. Air is heated by the preheater 2C and then sent through the air flow path 2E to a gas inlet provided at the bottom of the container 2A. The sintered plate 2B arranged at the bottom of the container 2A is a porous member. Accordingly, the high-temperature air entering the container 2A from the gas inlet is supplied throughout the tobacco material 2D via the sintered plate 2B. The tobacco material 2D is heated by the supplied high-temperature air.

The container 2A is accommodated in the oven (not shown in the figure). Thus, the tobacco material 2D is also heated from outside the container 2A.

By heating the tobacco material 2D in this manner, a flavor component-containing gas is generated from the tobacco material 2D and discharged from a gas outlet provided at the top of the container 2A and through the gas flow path 2F.

It is possible to change the composition of the flavor component-containing gas by changing the concentration of oxygen in the air sent to the container 2A. Thus, the oxygen concentration in the air sent to the container 2A may be controlled so as to change the composition of the flavor component-containing gas. As one example, lowering the oxygen concentration in the air can reduce the content of harmful components in the flavor component-containing gas.

Note that the heating step is not limited to the use of the heating device shown in FIG. 2 as long as the flavor components are successfully vaporized from the tobacco material.

With the heating step described above, a flavor component-containing gas is obtained.

<Adsorbent-Containing Water Passing Through Step (S2)>

The adsorbent-containing water passing through step (S2) causes the flavor component-containing gas obtained in the heating step (S1) to pass through water which contains an adsorbent so that the flavor components are adsorbed on the adsorbent. By this, water containing the adsorbent that has adsorbed the flavor components (i.e., the flavor component adsorbent) is obtained (see FIG. 1).

The adsorbent used in this step is preferably a porous material. The porous material refers to a material which has a large number of fine-sized holes (i.e., pores). As the porous material, a material having a wide pore distribution from micro-pores (d<2 nm) to meso-pores (2 nm≤d≤50 nm) and even to macro-pores (50 nm<d), that is, a material having pores of various sizes including micro-pores, meso-pores, and macro-pores is preferable. Pore sizes of porous materials are known to show a correlation with molecular weights of molecules that can be adsorbed. Thus, a porous material showing a wide pore distribution is capable of adsorbing, into its pores, flavor components of various molecular sizes which have been derived from the tobacco material.

The adsorbent may have any form, for example, a particulate form, a sheet form, or a fiber form. The adsorbent is preferably in the form of particles. The adsorbent is more preferably a porous material which has a form of particles. In other words, the adsorbent is more preferably porous particles. The particle size of the adsorbent particles may be determined in consideration of the application to a flavor inhaler, convenience in handling, processability into a molded body, etc. In one example, the adsorbent particles each have a particle size of 200 to 1000 μm.

The porous material preferably has a total pore volume of 0.2 to 3.0 mL/g. The porous material more preferably has a total pore volume of 0.4 to 1.5 mL/g. It is also preferable that the porous material include all of the micro-pores (d<2 nm), meso-pores (2 nm≤d≤50 nm), and macro-pores (50 nm<d). The pore volume here refers to a value obtained by measurement according to JIS Z8831-2:2010 and JIS Z8831-3:2010. The porous material also preferably has a BET specific surface area of 500 to 2000 m²/g. The porous material more preferably has a BET specific surface area of 550 to 1000 m²/g. The BET specific surface area here refers to a value obtained by measurement according to JIS Z8830:2013.

Examples of the porous material include activated carbon, activated alumina, a synthetic adsorbent, and zeolite. The porous material is preferably activated carbon. The activated carbon is capable of adsorbing, into its pores, flavor components of various molecular sizes which have been derived from the tobacco material. One type of the porous material or a combination of two or more types of the porous materials differing in pore properties may be employed.

The activated carbon may have any form, for example, a particulate form, a sheet form, or a fiber form. The activated carbon is preferably in the form of particles. In other words, the adsorbent is preferably activated carbon particles. The activated carbon particles are also called granular activated carbon, which may include crushed activated carbon and granulated activated carbon. In one example, the activated carbon particles each have a particle size of 200 to 1000 μm.

The adsorbent may be settled or suspended in water. In this step, water serves to allow the flavor components derived from the tobacco material to be efficiently adsorbed onto the adsorbent through dissolution in the water, without releasing the flavor components into the atmosphere. That is, the water serves as a trapping solvent to temporarily trap the flavor components derived from the tobacco material. The water here is not particularly limited, and any of tap water, ion-exchanged water, distilled water, etc. may be used.

In this step, the mass ratio between the adsorbent and the water may be set to, for example, 1:0.5 to 1:20, preferably 1:2 to 1:5.

A description will be given of reasons why water serves as a good trapping solvent.

The adsorbent such as activated carbon is contained in water in this step, but has a non-polar nature, and as such, it hardly adsorbs the water, which is a polar molecule. Thus, use of water as a trapping solvent hardly causes the adsorbent to adsorb water before adsorbing the flavor components derived from the tobacco material, such that the adsorption of the flavor components derived from the tobacco material would not be disturbed. Also, many of the flavor components derived from the tobacco material are non-polar, and as such, they are energetically more stable in the state of being adsorbed on the adsorbent than in the state of being dissolved in water. Accordingly, once adsorbed onto the adsorbent through dissolution in water, the flavor components derived from the tobacco material are stably maintained in the adsorbed state on the adsorbent. For these reasons water is a good trapping solvent.

Meanwhile, it might be another option to use, as a trapping solvent, a solvent generally employed as an aerosol source for a heating-type flavor inhaler (e.g., polyethylene glycol or glycerin), ethanol which is described in the prior art document (International Publication No. 2017/144705), or the like. However, use of polyethylene glycol or glycerin as a trapping solvent would cause the adsorbent such as activated carbon to adsorb such a liquid before adsorbing the flavor components derived from the tobacco material, which renders impossible the sufficient adsorption of the flavor components derived from the tobacco material (see later described Example 2). Also, in the case of using ethanol as a trapping solvent, the flavor components derived from the tobacco material cannot be sufficiently adsorbed onto the adsorbent since the flavor components derived from the tobacco material are energetically more stable in the state of being dissolved in ethanol than in the state of being adsorbed on the adsorbent. These solvents are therefore not suitable as a trapping solvent.

The passing through step (S2) may preferably be conducted by causing bubbling in the adsorbent-containing water with the flavor component-containing gas obtained in the heating step (S1). In the passing through step (S2), for example, water may be used in an amount of 3 to 20 mL per 10 g of the tobacco material.

The passing through step (S2) may be conducted using a device which collects a gas by dissolving it in a liquid. In one example, this step may be conducted using a dissolving device shown in FIG. 3. This dissolving device 3 shown in FIG. 3 is connected to the heating device shown in FIG. 2 via the gas flow path 2F. As shown in FIG. 3, the dissolving device 3 includes an inner container 3A for accommodating water 3E containing an adsorbent 3D, a sintered filter 3B as a bubbling nozzle, an outer container 3C for accommodating the inner container 3A, the gas flow path 2F for sending the flavor component-containing gas to the inner container 3A, and a discharge gas flow path 3H for discharging the gas present within the inner container 3A.

An adsorbing operation realized through dissolution in water will be described. The flavor component-containing gas obtained in the heating step (S1) is sent through the gas flow path 2F to the sintered filter 3B arranged at the end of the gas flow path 2F. The sintered filter 3B has a porous structure and is immersed in the water 3E containing the adsorbent 3D. The flavor component-containing gas thus causes bubbling in the water 3E containing the adsorbent 3D. The flavor component-containing gas is accordingly dissolved in the water 3E and adsorbed onto the adsorbent 3D contained in the water 3E.

The inner container 3A accommodates glass beads 3F in addition to the adsorbent 3D and the water 3E. Conducting the bubbling under the presence of the glass beads 3F allows the flavor components to be more efficiently trapped in the water 3E and adsorbed onto the adsorbent 3D.

Bubbling of the water 3E with the flavor component-containing gas increases the temperature of the water 3E. To cope with this, ice water 3G is accommodated in the outer container 3C. This can prevent a temperature rise of the water 3E. The gas generated within the inner container 3A is discharged through the discharge gas flow path 3H.

Note that the passing through step (S2) is not limited to the use of the dissolving device shown in FIG. 3 as long as the flavor component-containing gas obtained in the heating step is successfully adsorbed onto the adsorbent through dissolution in water.

With the passing through step described above, the flavor component-containing gas is adsorbed onto the adsorbent. Accordingly, water containing the adsorbent that has adsorbed the flavor components (i.e., the flavor component adsorbent) is obtained.

<Recovering Step (S3)>

The recovering step (S3) recovers the flavor component adsorbent from the “water containing the adsorbent that has adsorbed the flavor components (i.e., the flavor component adsorbent)” obtained in the foregoing passing through step (S2) (see FIG. 1).

For example, the recovery may be conducted by suctioning water from the water containing the flavor component adsorbent, or by allowing the water containing the flavor component adsorbent to pass through a filtering member such as a filter or a sieve.

After the recovery, the flavor component adsorbent may be dried. Drying the flavor component adsorbent enables removal of water remaining on the surface of the flavor component adsorbent. This prevents the flavor component adsorbent from causing aggregation so that its ease of handling can be enhanced. The drying may be conducted by blowing air onto the flavor component adsorbent at room temperature (e.g., a temperature of 15 to 25° C.), or by subjecting the flavor component adsorbent to heat drying. The heat drying may be conducted by, for example, applying heat with a heater or blowing heated air. If the heat drying is adopted, the drying may be conducted at a temperature of, for example, 50 to 100° C. Heating at such a temperature can obviate desorption of the flavor components that have been adsorbed onto the adsorbent from the adsorbent.

<Optional Steps>

The foregoing method may further include, between the passing through step (S2) and the recovering step (S3), cooling the water containing the adsorbent that has adsorbed the flavor components (i.e., the flavor component adsorbent).

For example, the cooling may be conducted by keeping the water containing the flavor component adsorbent stationary at a temperature of 0 to 30° C. for a period of 0.1 to 72 hours. The cooling temperature may preferably be set to 0 to 10° C., and the cooling time may preferably be set to 6 to 48 hours. By cooling the water containing the flavor component adsorbent at the timing between the passing through step (S2) and the recovering step (S3), the adsorbent that has adsorbed the flavor components can be encouraged to further adsorb the flavor components.

The foregoing method may further include a step of adding a liquid which serves as an aerosol source to the tobacco material prior to the heating step (S1).

As used herein, the term “aerosol source” refers to a source (liquid) for generating vapor (gas) when heated by a heating-type flavor inhaler. The term “aerosol source” refers to a source (liquid) for generating a dispersion medium (gas) for aerosol (tobacco vapor), and does not include fine particles (such as flavor components) in the aerosol.

Adding a liquid serving as an aerosol source to the tobacco material prior to the heating step (S1) facilitates the vaporization of the flavor components from the tobacco material during the heating step (s1), which can enhance the efficiency in recovery of the flavor components from the tobacco material. This can increase the amount of adsorbed flavor components in the eventually obtained flavor component adsorbent.

As the aerosol source, a liquid usable as an aerosol source in a heating-type flavor inhaler may be used. For example, propylene glycol, glycerin, 1,3-propanediol, diacetin, polyethylene glycol, or any mixture thereof may be used. Preferably, the aerosol source is propylene glycol, glycerin, or a mixture of propylene glycol and glycerin. For the case of adopting the mixture of propylene glycol and glycerin, the mass ratio between propylene glycol and glycerin is not particularly limited and may be set to, for example, 0.1:9.9 to 9.9:0.1.

The liquid mentioned for the exemplary purpose has a lower polarity than water, and the flavor components have a relatively low polarity. Thus, the exemplary liquid is suitable as a liquid for facilitating the vaporization of the flavor components from the tobacco material. For example, the aerosol source may be added in an amount of 0.1 to 20 mL per 10 g of the tobacco material.

<Effects>

By heating the tobacco material and then passing the thus-obtained gas through the water containing the adsorbent in accordance with the method of the present invention, it is possible to dissolve the gas in the water without having it released into the atmosphere, and to subsequently adsorb, onto the adsorbent present in the water, the flavor components contained in the gas dissolved in the water. As such, the method of the present invention can efficiently adsorb the flavor components derived from the tobacco material onto the adsorbent through dissolution in water, without releasing the flavor components into the atmosphere. Also, the flavor components derived from the tobacco material are, once adsorbed onto the adsorbent, hardly dissolved in water again and they can stably maintain their adsorbed state.

Since the method of the present invention can recover the flavor components from the tobacco material with high recovery efficiency as discussed above, the flavor component adsorbent obtained by the method of the present invention can contain an abundant amount of the flavor components derived from the tobacco material.

Additionally, the method of the present invention is superior to the gas-phase adsorption and the liquid-phase adsorption described in the prior art document (International Publication No. 2017/144705) in the following respects.

The prior art document (International Publication No. 2017/144705) discloses directly adsorbing volatiles generated by heating a tobacco material onto adsorbents (i.e., gas-phase adsorption). Such gas-phase adsorption is considered to require a large amount of adsorbents in order to adsorb the volatiles generated by heating the tobacco material only in the gas phase. In contrast, by first trapping the gas generated by heating a tobacco material in water as in the present invention, the flavor components trapped by the water can be efficiently recovered without using a large amount of adsorbents.

Also, supposing that the gas-phase adsorption is conducted using an adsorbent particle-filled column, it is expected that the adsorbent particles located near the column inlet would adsorb the flavor components at a particularly high concentration, and the adsorbent particles finally recovered would then involve non-uniform adsorption results. Further in this case, heating the tobacco material produces “tar” (which refers to a viscous substance in smoke generated from the burnt tobacco material), and there is even a risk of tar clogging at the column inlet. In contrast, the method of the present invention is free from the occurrence of problems such as non-uniform flavor-component adsorption results and tar clogging.

The prior art document (International Publication No. 2017/144705) also discloses dissolving volatiles generated by heating a tobacco material in a liquid (i.e., liquid-phase adsorption). Such liquid-phase adsorption provides a flavor liquid in which flavor components are dissolved. Normally, this flavor liquid needs to be concentrated in order to be incorporated into a flavor inhaler in the liquid form, and the concentrating is conducted by subjecting the flavor liquid to a drying process utilizing reduced-pressure heating or the like. The concentrating is carried out by heating the flavor liquid at a temperature of approximately 40 to 100° C. under reduced pressure, but this process would force the flavor components in the flavor liquid to volatilize.

As another option, it is possible to pour the flavor liquid obtained by the liquid-phase adsorption back into the tobacco residue, mold the obtained mixture, and incorporate it into a flavor inhaler. This option incurs the necessity of concentrating the flavor liquid before pouring it back into the tobacco residue, and the necessity of conducting drying to remove water added for the molding. The concentrating is carried out by heating the flavor liquid at a temperature of approximately 40 to 100° C. Also, the drying for the removal of water is carried out through heating at a temperature of about 70 to 120° C. These processes would likewise volatilize the flavor components in the flavor liquid.

In contrast, according to the method of the present invention, the flavor components derived from the tobacco material are, in their final state, adsorbed on the adsorbent and do not remain in water. Therefore, no heating for the purpose of concentrating the solvent is required after recovery of the adsorbent that has adsorbed the flavor components. As described above, the recovered adsorbent may be subjected to heat-drying at a temperature of approximately 50 to 100° C. in order to remove moisture on the surface, but the heating at such a temperature would hardly volatilize the flavor components adsorbed on the adsorbent. This is because the volatilization of components adsorbed on the adsorbent must give the adsorbed components not only “energy for volatilizing” but also “energy for escaping from the state of being adsorbed on the adsorbent”. That is, in order to volatilize the components adsorbed on the adsorbent by heating, application of heat (energy) which is higher than that for volatilizing the same components not adsorbed on the adsorbent is required.

Therefore, the flavor component adsorbent obtained by the method of the present invention does not cause volatilization of the flavor components unless it is heated at a temperature higher than the heating temperature that causes volatilization of the flavor components in the case of a flavor liquid obtained by the liquid-phase adsorption. It should be noted that the flavor component adsorbent obtained by the method of the present invention is, after incorporation into a heating-type flavor inhaler, heated at a high temperature of approximately 150 to 400° C., and accordingly, the flavor components adsorbed on the adsorbent will be easily released.

<2. Flavor Component Adsorbent>

According to another aspect, a flavor component adsorbent obtained by the above-described “method for producing a flavor component adsorbent” is provided. The flavor component adsorbent is, as is apparent from its production method, constituted by an adsorbent and flavor components adsorbed on the adsorbent. The flavor component adsorbent may have any form, for example, a particulate form, a sheet form, or a fiber form, as in the case of the adsorbent. The flavor component adsorbent preferably has a particulate form. The flavor component adsorbent in the particulate form has a particle size of, for example, 200 to 1000 μm.

The flavor component adsorbent may be used as a flavor source of a heating-type flavor inhaler by itself, or may be used as a flavor source in combination with a tobacco filler generally employed for a heating-type flavor inhaler.

As described above, since the method of the present invention can recover the flavor components from the tobacco material with high recovery efficiency, the flavor component adsorbent obtained by the method of the present invention can contain an abundant amount of the flavor components derived from the tobacco material. Therefore, incorporating such a flavor component adsorbent into a heating-type flavor inhaler can provide an excellent smoking flavor to a user.

<3. Flavor Molded Body and Method for Producing Same>

The flavor component adsorbent described above may be used in such a manner that it is incorporated into a heating-type flavor inhaler as it is, or that it is processed into a molded body together with a molding material and then the obtained molded body is incorporated into a heating-type flavor inhaler.

Thus, according to another aspect, a flavor molded body containing the above-described flavor component adsorbent and a molding material is provided.

According to still another aspect, there is provided a method for producing a flavor molded body, the method including mixing the above-described flavor component adsorbent with a molding material and molding the obtained mixture. More specifically, a method for producing a flavor molded body includes:

• • heating a tobacco material to vaporize flavor components from the tobacco material;
  • passing a gas containing the flavor components through water containing an adsorbent to adsorb the flavor components on the adsorbent;
  • recovering the adsorbent that has adsorbed the flavor components to obtain a flavor component adsorbent; and
  • mixing the flavor component adsorbent with a molding material and molding the obtained mixture.
    The molding may be conducted by a known method for molding cut tobacco or tobacco fine powder (i.e., a fine powder of cut tobacco), and examples of such known methods include compression molding, rolling molding, etc. As the molding material, a known binder may be used.

According to still another aspect, a flavor molded body obtained by the above method is provided.

Molding the above-described flavor component adsorbent into a desired shape can enhance its ease of handling for incorporation into a heating-type flavor inhaler. Also, molding the above-described flavor component adsorbent into a desired shape can prevent the flavor component adsorbent from easily dropping off from a heating-type flavor inhaler after incorporation into the heating-type flavor inhaler.

The flavor molded body may be formed into any shape, and examples of such possible shapes include a tablet shape, a sheet shape, a granular shape, and a fiber shape. As the flavor molded body, the product obtained by the molding may be used in its original size so as to serve as a flavor source of a heating-type flavor inhaler, or the product obtained by the molding may be first cut into desirably sized pieces and used to serve as a flavor source of a heating-type flavor inhaler.

Also, the flavor molded body may be used as a flavor source of a heating-type flavor inhaler by itself, or may be used as a flavor source in combination with a tobacco filler generally employed for a heating-type flavor inhaler.

According to one example, the flavor molded body may be produced by mixing the above-described flavor component adsorbent with cellulose powder and alcohol having 2 to 7 carbon atoms (e.g., ethanol), compression-molding the obtained mixture into a tablet shape (i.e., a flat cylindrical shape), and drying the resultant at room temperature (e.g., 20° C.). Instead of cellulose powder, tobacco fine powder may be employed as a binder in this example. As the cellulose powder or the tobacco fine powder, powder having an average particle size of, for example, 10 to 200 μm may be employed. A single piece of the tablet-shaped flavor molded body may be used as a flavor source of a heating-type flavor inhaler, or multiple pieces of the tablet-shaped flavor molded bodies may be used as a flavor source of a heating-type flavor inhaler.

According to another example, the flavor molded body may be produced by mixing the above-described flavor component adsorbent with cellulose powder, an additional binder (e.g., guar gum), and water, molding the obtained mixture into a sheet shape, and heat-drying the resultant. Also in this example, tobacco fine powder may be employed as a binder, instead of cellulose powder. As the cellulose powder or the tobacco fine powder, powder having an average particle size of, for example, 10 to 200 um may be employed. As the sheet-shaped flavor molded body, the product obtained by the molding may be used in its original size so as to serve as a flavor source of a heating-type flavor inhaler, or the sheet-shaped flavor molded body may be first cut into desirably sized pieces and used to serve as a flavor source of a heating-type flavor inhaler.

<Effects>

The above-described flavor component adsorbent can contain an abundant amount of the flavor components derived from the tobacco material. Therefore, producing a flavor molded body using the above-described flavor component adsorbent and incorporating this flavor molded body into a heating-type flavor inhaler can provide an excellent smoking flavor to a user.

<4. Heat-Not-Burn Flavor Inhaler and Flavor-Generating Article>

The above-described “flavor component adsorbent” or the above-described “flavor molded body” may be incorporated into any heat-not-burn flavor inhaler. That is, according to another aspect, there is provided a heat-not-burn flavor inhaler including a flavor source containing the above-described “flavor component adsorbent” and a heater for heating the flavor source. According to still another aspect, there is provided a heat-not-burn flavor inhaler including a flavor source containing the above-described “flavor molded body” and a heater for heating the flavor source.

A heat-not-burn flavor inhaler refers to a flavor inhaler which provides a tobacco flavor to a user by heating a flavor source such as a tobacco filler or a tobacco flavored liquid without burning the flavor source. In this disclosure, a heat-not-burn flavor inhaler may also be simply called a “heating-type flavor inhaler”. Examples of such a heating-type flavor inhaler include:

• • a carbon heat source-type flavor inhaler which heats a tobacco filler with combustion heat of a carbon heat source (see, for example, WO 2006/073065);
  • an electric heating-type flavor inhaler which includes a tobacco stick containing a tobacco filler and a heating device for electrically heating the tobacco stick (see, for example, WO 2010/110226); and
  • a liquid atomizing-type flavor inhaler which heats a liquid aerosol source with a heater to generate aerosol and permits a flavor from a tobacco filler to be inhaled together with the aerosol (see, for example, WO 2015/046385).

According to a preferred first embodiment, there is provided a heat-not-burn flavor inhaler including:

• • a flavor-generating article including: a flavor source containing the above-described “flavor component adsorbent” or the above-described “flavor molded body”, and a wrapping paper wrapped around the flavor source; and
  • a heater for heating the flavor source included in the flavor-generating article.

This embodiment provides a flavor-generating article including: a flavor source containing the above-described “flavor component adsorbent” or the above-described “flavor molded body”, and a wrapping paper wrapped around the flavor source. The flavor-generating article is also referred to as a tobacco stick. The flavor-generating article may further include a filter downstream of the flavor source (that is, on the mouthpiece side).

According to a preferred second embodiment, there is provided a heat-not-burn flavor inhaler including:

• • a flavor source containing the above-described “flavor component adsorbent” or the above-described “flavor molded body”;
  • a liquid storage portion for storing a liquid aerosol source to be supplied to the flavor source; and
  • a heater for heating the flavor source to which the aerosol source has been supplied, atomizing the aerosol source and releasing the flavor components from the flavor source.

An example of the heat-not-burn flavor inhaler according to the first embodiment and an example of the heat-not-burn flavor inhaler according to the second embodiment will be described with reference to the drawings.

<Example of Heat-Not-Burn Flavor Inhaler According to First Embodiment>

An example of the heat-not-burn flavor inhaler according to the first embodiment will be described with reference to FIGS. 4A, 4B, 4C, 5, and 6. In this example, a heat-not-burn flavor inhaler is constituted by an aerosol-generating device 100 and a flavor-generating article 200. FIG. 4A is a schematic front view of one example of the aerosol-generating device. FIG. 4B is a schematic top view of the aerosol-generating device shown in FIG. 4A. FIG. 4C is a schematic bottom view of the aerosol-generating device shown in FIG. 4A. FIG. 5 is a schematic sectional side view of one example of the flavor-generating article. FIG. 6 is a sectional view of the aerosol-generating device taken along the line III-III shown in FIG. 4B.

The drawings may give an X-Y-Z orthogonal coordinate system for the sake of description. In this coordinate system, the Z axis is directed vertically upward, the X-Y plane is disposed as if cutting the aerosol-generating device 100 in the horizontal direction, and the Y axis is disposed as if extending from the front surface to the rear surface of the aerosol-generating device 100. The Z axis may also be referred to as an insertion direction of the flavor-generating article for accommodation in a chamber 150 of a later-described atomization unit 130, or as an axial direction of the chamber 150. Also, the X axis may be referred to as a direction orthogonal to the Y axis and the Z axis, and the X axis and the Y axis may each be referred to as a radial direction orthogonal to the axial direction of the chamber 150 or a radial direction of the chamber 150.

The aerosol-generating device 100 is configured to generate flavor-containing aerosol by heating a stick-type flavor-generating article having a flavor source containing the above-described “flavor component adsorbent” or the above-described “flavor molded body”.

As shown in FIGS. 4A to 4C, the aerosol-generating device 100 includes an outer housing 101 (corresponding to an example of a casing), a slide cover 102, and a switch part 103. The outer housing 101 constitutes the outermost housing of the aerosol-generating device 100 and has a size to fit in the hand of a user. For the user to use the flavor inhaler, the user can hold the aerosol-generating device 100 with their hand and inhale the aerosol. The outer housing 101 may be constituted by an assembly of multiple members. The outer housing 101 is, in one example, made of a resin such as, in particular, polycarbonate (PC), an acrylonitrile-butadiene-styrene (ABS) resin, polyether ether ketone (PEEK), or a polymer alloy containing multiple kinds of polymers, or may be made of a metal such as aluminum.

The outer housing 101 has an opening (not shown in the figure) for receiving the flavor-generating article, and the slide cover 102 is slidably attached to the outer housing 101 to close the opening. More specifically, the slide cover 102 is configured to be movable along an outer surface of the outer housing 101 between a closed position (the position shown in FIGS. 4A and 4B) where it closes the opening of the outer housing 101 and an open position (the position shown in FIG. 6) where it exposes the opening. For example, the user may manually operate the slide cover 102 so that the slide cover 102 moves between the closed position and the open position. This can permit or restrict the access of the flavor-generating article to the inside of the aerosol-generating device 100.

The switch part 103 is used to switch ON and OFF an operation of the aerosol-generating device 100. For example, the user may operate the switch part 103 in a state where the flavor-generating article is inserted into the aerosol-generating device 100, and thereby electric power can be supplied from the power source (cf. reference sign 121 in FIG. 6) to a heater (cf. reference sign 140 in FIG. 6) to heat the flavor-generating article without burning it. Note that the switch part 103 may be a switch provided outside the outer housing 101 or may be a switch located inside the outer housing 101. If the switch is located inside the outer housing 101, the switch is indirectly pressed down by the switch part 103 at the surface of the outer housing 101 being pressed down. For this example, the description will assume that the switch of the switch part 103 is located inside the outer housing 101.

The aerosol-generating device 100 may further include a terminal (not shown in the figure). The terminal may be an interface for connecting the aerosol-generating device 100 to, for example, an external power source. If the aerosol-generating device 100 includes a rechargeable battery as its power source, an external power source may be connected to the terminal so that the external power source can flow current to the power source and charge the power source. Also, data associated with operations of the aerosol-generating device 100 may be transmitted to an external device through connection of the terminal with a data transmission cable.

Next, the flavor-generating article for use in the aerosol-generating device 100 will be described. FIG. 5 is a schematic sectional side view of one example of the flavor-generating article 200. This example assumes that the aerosol-generating device 100 and the flavor-generating article 200 constitute a flavor inhaler. As shown in FIG. 5, the flavor-generating article 200 includes a smokable material 201, a tubular member 204, a hollow filter portion 206, and a filter portion 205.

The smokable material 201 is wrapped by a first wrapping paper 202. The tubular member 204, the hollow filter portion 206, and the filter portion 205 are wrapped by a second wrapping paper 203 differing from the first wrapping paper 202. The second wrapping paper 203 also wraps a part of the first wrapping paper 202 that wraps the smokable material 201. This couples the tubular member 204, the hollow filter portion 206, and the filter portion 205 to the smokable material 201. Note that the second wrapping paper 203 may be omitted, and the tubular member 204, the hollow filter portion 206, and the filter portion 205 may be coupled to the smokable material 201 using the first wrapping paper 202. A lip release agent 207 for facilitating the separation of the lip of a user from the second wrapping paper 203 is applied to the outer surface of the second wrapping paper 203 around the end portion on the filter portion 205 side. The portion of the flavor-generating article 200 to which the lip release agent 207 is applied functions as a mouthpiece of the flavor-generating article 200.

The smokable material 201 includes the above-described “flavor component adsorbent” or the above-described “flavor molded body” as a flavor source. The “flavor component adsorbent” and the “flavor molded body” may each be used as a flavor source of a heating-type flavor inhaler by itself, or may be used as a flavor source in combination with a tobacco filler generally employed for a heating-type flavor inhaler, as described above. If, for example, the flavor molded body has a tablet shape, a single piece of the flavor molded body may be used as a flavor source of a heating-type flavor inhaler, or multiple pieces of the flavor molded bodies may be used as a flavor source of a heating-type flavor inhaler. In the case of the flavor molded body having a sheet shape, the product obtained by the molding may be used in its original size so as to serve as a flavor source of a heating-type flavor inhaler, or the sheet-shaped flavor molded body may be first cut into desirably sized pieces and used to serve as a flavor source of a heating-type flavor inhaler.

Also, the first wrapping paper 202 for wrapping the smokable material 201 may be an air-permeable sheet member. The tubular member 204 may be a paper pipe or a hollow filter. This example assumes that the flavor-generating article 200 includes the smokable material 201, the tubular member 204, the hollow filter portion 206, and the filter portion 205, but the flavor-generating article 200 is not limited to such a configuration. For example, the hollow filter portion 206 may be omitted, and the tubular member 204 and the filter portion 205 may be disposed adjacent to each other.

Next, an internal structure of the aerosol-generating device 100 will be described. FIG. 6 is a sectional view of the aerosol-generating device 100 taken along the line III-III shown in FIG. 4B. As shown in FIG. 6, an inner housing 110 (corresponding to an example of a casing) is provided inside the outer housing 101 of the aerosol-generating device 100. The inner housing 110 is, in one example, made of a resin such as, in particular, polycarbonate (PC), an acrylonitrile-butadiene-styrene (ABS) resin, polyether ether ketone (PEEK), or a polymer alloy containing multiple kinds of polymers, or may be made of a metal such as aluminum. Note that the inner housing 110 is preferably made of PEEK from the viewpoint of heat resistance and strength. A power source unit 120 and the atomization unit 130 are provided in the internal space of the inner housing 110.

The power source unit 120 includes a power source 121. The power source 121 may be, for example, a rechargeable battery or a non-rechargeable battery. The power source 121 is electrically connected to the atomization unit 130. The power source 121 is thus able to supply power to the atomization unit 130 so as to appropriately heat the flavor-generating article 200.

The atomization unit 130 includes, as shown in FIG. 6, a metal chamber 150 (corresponding to an example of a tubular portion) extending in the insertion direction of the flavor-generating article 200 (in the Z-axis direction), a heater 140 covering a part of the chamber 150, a heat-insulating portion 132, and a substantially tubular insertion guide member 134 (corresponding to an example of a guide portion) adjacent to an opening of the chamber 150. The chamber 150 is formed in such a configuration as to surround the periphery of the flavor-generating article 200. The heater 140 is formed to include a heating portion which contacts the outer circumferential surface of the chamber 150 and heats the flavor-generating article 200 inserted into the chamber 150.

Also, as shown in FIG. 6, a bottom member 136 (corresponding to an example of an abutting portion) is provided at the bottom of the chamber 150. The bottom member 136 may function as a stopper for positioning the flavor-generating article 200, by abutting the flavor-generating article 200 inserted into the chamber 150 in the insertion direction of the flavor-generating article 200. Here, the chamber 150 and the bottom member 136 constitute an accommodating portion for accommodating at least a part of the flavor-generating article 200. The bottom member 136 may be formed of, for example, a resin material. The bottom member 136 may have an irregularity in its surface that contacts the flavor-generating article 200, so that a first air flow path for supplying air to an air inlet of the flavor-generating article 200 (namely, an air flow path communicating with the flavor-generating article 200 accommodated in the accommodating portion) is defined. The bottom member 136 is, in one example, made of a resin such as, in particular, polycarbonate (PC), an acrylonitrile-butadiene-styrene (ABS) resin, polyether ether ketone (PEEK), or a polymer alloy containing multiple kinds of polymers, or may be made of a metal such as aluminum. Note, however, that the bottom member 136 is preferably made of a material with a low thermal conductivity in order to prevent heat from being transferred to the heat-insulating portion 132, etc.

The heat-insulating portion 132 has a substantially tubular shape as a whole and is disposed to cover the chamber 150. The heat-insulating portion 132 may include, for example, an aerogel sheet. The insertion guide member 134 is provided between the slide cover 102 at the closed position and the chamber 150. The insertion guide member 134 is, in one example, made of a resin such as, in particular, polycarbonate (PC), an acrylonitrile-butadiene-styrene (ABS) resin, polyether ether ketone (PEEK), or a polymer alloy containing multiple kinds of polymers. The insertion guide member 134 may be formed of metal, glass, ceramic, or the like. From the viewpoint of heat resistance, the insertion guide member 134 is preferably made of PEEK. The insertion guide member 134 communicates with the outside of the aerosol-generating device 100 while the slide cover 102 is located at the open position, and guides the flavor-generating article 200 for insertion into the chamber 150 by inserting the flavor-generating article 200 into the insertion guide member 134. With the insertion guide member 134, easy insertion of the flavor-generating article 200 into the chamber 150 is enabled.

The aerosol-generating device 100 further includes a first holding portion 137 and a second holding portion 138 for holding both ends of the chamber 150 and the heat-insulating portion 132. The first holding portion 137 is disposed so as to hold the end portions of the chamber 150 and the heat-insulating portion 132 on the z-axis negative direction side. The second holding portion 138 is disposed so as to hold the end portions of the chamber 150 and the heat-insulating portion 132 on the slide cover 102 side (on the Z-axis positive direction side).

<Example of Heat-Not-Burn Flavor Inhaler According to Second Embodiment>

An example of the heat-not-burn flavor inhaler according to the second embodiment will be described with reference to FIGS. 7 to 10. FIG. 7 is a perspective view showing an example of the heat-not-burn flavor inhaler. FIG. 8 is a perspective view of a power supply unit in the heat-not-burn flavor inhaler shown in FIG. 7. FIG. 9 is a sectional view of the heat-not-burn flavor inhaler shown in FIG. 7. FIG. 10 is a block diagram showing a configuration of the main part of the power supply unit in the heat-not-burn flavor inhaler shown in FIG. 7.

This heat-not-burn flavor inhaler 1 (which may be simply called a “heating-type flavor inhaler 1” below) shown in FIGS. 7 to 10 has a rod shape extending along a predetermined direction (hereinafter referred to as a longitudinal direction A). The heating-type flavor inhaler 1 includes, as shown in FIG. 7, a power supply unit 10 and a cartridge 20 in this order along the longitudinal direction A. The cartridge 20 is detachable from the power supply unit 10. In other words, the cartridge 20 is replaceable.

(Power Supply Unit)

The power supply unit 10 accommodates, as shown in FIGS. 8 and 9, a power supply 12, a charger 13, a control part 50, various sensors, etc., inside a cylindrical power supply unit case 11. The power supply 12 is a rechargeable secondary battery which is preferably a lithium ion secondary battery.

A discharge terminal 41 is provided at a top portion 11a located on one end side in the longitudinal direction A (i.e., the cartridge 20 side) of the power supply unit case 11. The discharge terminal 41 is provided in such a form as to protrude from the upper surface of the top portion 11a toward the cartridge 20 and is configured to be electrically connectable to a load 21 in the cartridge 20.

Also, at the upper surface of the top portion 11a, an air supply part 42 for supplying air to the load 21 in the cartridge 20 is provided in the vicinity of the discharge terminal 41.

A charge terminal (not shown in the figure) electrically connectable to an external power source that can charge the power supply 12 is provided at a bottom portion 11b located on the other end side in the longitudinal direction A (the side opposite to the cartridge 20) of the power supply unit case 11.

A user-operable operation part 14 is provided at the side surface of the top portion 11a of the power supply unit case 11. The operation part 14 is constituted by a button switch, a touch panel, or the like, and is used for activating/shutting off the control part 50 and the various sensors in response to user's intentions for use.

The control part 50 is, as shown in FIG. 10, connected to the charger 13, the operation part 14, various sensor devices such as an inhalation sensor 15 for detecting a puff (inhalation) action, a voltage sensor 16 for measuring a voltage of the power supply 12, and a temperature sensor 17 for detecting a temperature, and a memory 18 for storing the number of puff actions, the time of current application to the load 21, etc., and is adapted to perform various controls for the heating-type flavor inhaler 1. The inhalation sensor 15 may be constituted by a condenser microphone, a pressure sensor, etc. A concrete form of the control part 50 is a processor (micro-controller unit (MCU)). The structure of this processor is, in more concrete terms, electric circuitry formed of a combination of circuit elements such as semiconductor elements.

(Cartridge)

As shown in FIG. 9, the cartridge 20 includes, inside a cylindrical cartridge case 27, a reservoir 23 for retaining a liquid aerosol source 22, the electric load 21 for atomizing the aerosol source 22, a wick 24 for drawing the aerosol source from the reservoir 23 to the load 21, and an aerosol flow path 25 for the aerosol generated by the atomization of the aerosol source 22 to flow toward a mouthpiece 26A.

The reservoir 23 is delimited so as to surround the aerosol flow path 25 and retains the liquid aerosol source 22. The aerosol source is a liquid for forming aerosol. Examples that may be employed as the aerosol source include propylene glycol, glycerin, 1,3-propanediol, diacetin, polyethylene glycol, or any mixture thereof. The reservoir 23 may enclose a porous member such as a resin web or cotton, into which the aerosol source 22 may be impregnated. The reservoir 23 may keep only the aerosol source 22 without enclosing a porous member such as a resin web or cotton. Also, the reservoir 23 may contain a tobacco flavored liquid, an additional flavoring component (e.g., nicotine, a flavorant, etc.), and so on, in addition to the aerosol source 22.

The wick 24 includes the above-described “flavor component adsorbent” or the above-described “flavor molded body” as a flavor source. The wick 24 draws the aerosol source 22 from the reservoir 23 by utilizing capillary action. Once the aerosol source 22 permeates into the wick 24, the aerosol source 22 functions as an extracting solvent by which the flavor components are extracted from the “flavor component adsorbent” or the “flavor molded body” included in the wick 24. The aerosol source containing the flavor components is subsequently atomized (aerosolized) by heat from the load 21, thereby enabling the flavor to be provided to the user.

The wick 24 may be constituted by a combination of a liquid holding member such as glass fiber and the “flavor component adsorbent” or the “flavor molded body”, or may be constituted by the “flavor component adsorbent” or the “flavor molded body” alone. In other words, the “flavor component adsorbent” or the “flavor molded body” may constitute either a part or the whole of the wick 24.

For example, the flavor component adsorbent and the flavor molded body may each be incorporated into a bundle of glass fibers for use as the wick 24. As another form, the flavor molded body having a sheet shape may be cut into pieces of a size suitable for a wick and laminated (that is, formed into a laminate of sheet-shaped molded bodies) for use as the wick 24. As still another form, the flavor molded body having a sheet shape may be spirally wound or accordion folded for use as the wick 24. As still another form, the flavor molded body having a sheet shape may be cut into fibers and the cut-resultant fibers may be bundled (i.e., to form a bundle of cut-resultant fibers) for use as the wick 24.

The load 21 atomizes, without entailing combustion, the aerosol source 22 using an electric power supplied from the power supply 12 via the discharge terminal 41. The load 21 is constituted by a heating wire (coil) wound at a predetermined pitch. Note that the load 21 may be any element as long as it is capable of atomizing the aerosol source 22 to generate aerosol, and may be, for example, a heater element or an ultrasound generator. Examples of the heater element include a heat-generating resistor, a ceramic heater, an induction heating-type heater, etc.

The aerosol flow path 25 is provided on the downstream side of the load 21 and arranged on a center line L of the power supply unit 10.

In the heating-type flavor inhaler 1, air flowing in from an air intake port (not shown in the figure) provided in the power supply unit case 11 passes through the air supply part 42 and then the vicinity of the load 21 in the cartridge 20, as shown in FIG. 9, arrow B. The load 21 atomizes the aerosol source 22 drawn or moved by the wick 24 from the reservoir 23. The aerosol generated by the atomization flows through the aerosol flow path 25 together with the air flowing in from the air intake port, and is supplied to the mouthpiece 26A.

At the mouthpiece 26A, a gas outlet 26B through which the internal space of the cartridge case 27 and the space outside the heating-type flavor inhaler 1 are in communication with each other is arranged. For inhalation, the aerosol containing tobacco flavor components is discharged from the heating-type flavor inhaler 1 via this gas outlet 26B.

The heating-type flavor inhaler 1 also includes a notification part 45 for giving notifications of various information sets. The notification part 45 may be constituted by a light emitting element, a vibrating element, or a sound outputting element. The notification part 45 may be a combination of two or more of a light emitting element, a vibrating element, and a sound outputting element. The notification part 45 may be provided at either of the power supply unit 10 and the cartridge 20, but it is preferable that the notification part 45 be provided at the power supply unit 10 so as to keep the conductive line from the power supply 12 short. For example, the notification part 45 may be provided to surround the operation part 14 with such a configuration that the periphery of the operation part 14 is translucent and a light emitting element such as an LED emits light.

<5. Preferred Embodiments>

A collection of preferred embodiments will be set forth.

<A1> A method for producing a flavor component adsorbent, including:

• • heating a tobacco material to vaporize flavor components from the tobacco material;
  • passing a gas containing the flavor components through water containing an adsorbent to adsorb the flavor components on the adsorbent; and
  • recovering the adsorbent that has adsorbed the flavor components.

<A2> The method according to <A1>, wherein the adsorbent is a porous material.

<A3> The method according to <A1> or <A2>, wherein the porous material has a total pore volume of 0.2 to 3.0 mL/g, preferably 0.4 to 1.5 mL/g.

<A4> The method according to any one of <A1> to <A3>, wherein the porous material includes all of micro-pores (d<2 nm), meso-pores (2 nm≤d≤50 nm), and macro-pores (50 nm<d).

<A5> The method according to any one of <A1> to <A4>, wherein the porous material has a BET specific surface area of 500 to 2000 m²/g, preferably 550 to 1000 m²/g.

<A6> The method according to any one of <A1> to <A5>, wherein the adsorbent is in a form of a particle.

<A7> The method according to <A6>, wherein the particle has a particle size of 200 to 1000 μm.

<A8> The method according to any one of <A1> to <A7>, wherein the adsorbent is activated carbon.

<A9> The method according to any one of <A1> to <A8>, wherein the passing through is conducted by causing bubbling of the gas in the water.

<A10> The method according to any one of <A1> to <A9>, wherein the passing through is conducted by causing bubbling of the gas in the water via a porous member (preferably a porous filter).

<A11> The method according to any one of <A1> to <A10>, wherein the passing through is conducted by causing bubbling of the gas in the water in which multiple beads are dispersed.

<A12> The method according to <A11>, wherein the beads have a diameter of 1 to 5 mm.

<A13> The method according to any one of <A1> to <A12>, wherein the heating is conducted at a temperature of 120 to 400° C.

<A14> The method according to any one of <A1> to <A13>, wherein the heating is conducted at a temperature of 160 to 230° C.

<A15> The method according to any one of <A1> to <A14>, wherein the heating is conducted for 5 to 60 minutes, preferably 10 to 30 minutes.

<A16> The method according to any one of <A1> to <A15>, wherein the heating is conducted by supplying heated air to the tobacco material.

<A17> The method according to any one of <A1> to <A16>, wherein the heating is conducted by supplying heated air to the tobacco material via a porous member (preferably a porous plate).

<A18> The method according to any one of <A1> to <A17>, further including, between the passing through and the recovering, cooling the water containing the adsorbent.

<A19> The method according to <A18>, wherein the cooling is conducted by keeping the water containing the adsorbent stationary at a temperature of 0 to 30° C., preferably 0 to 10° C., for a period of 0.1 to 72 hours, preferably 6 to 48 hours.

<A20> The method according to any one of <A1> to <A19>, further including, after the recovering, drying the adsorbent that has adsorbed the flavor components.

<A21> The method according to <A20>, wherein the drying is conducted by blowing air to the adsorbent that has adsorbed the flavor components, at room temperature (e.g., a temperature of 15 to 25° C.).

<A22> The method according to <A20>, wherein the drying is conducted by heat drying.

<A23> The method according to <A21>, wherein the heat drying is conducted at a temperature of 50 to 100° C.

<A24> The method according to any one of <A1> to <A23>, further including, before the heating, adding a liquid which serves as an aerosol source to the tobacco material.

<A25> The method according to <A24>, wherein the liquid is propylene glycol, glycerin, 1, 3-propanediol, diacetin, polyethylene glycol, or any mixture thereof.

<A26> The method according to <A24> or <A25>, wherein the liquid is propylene glycol, glycerin, or a mixture of propylene glycol and glycerin.

<A27> The method according to any one of <A24> to <A26>, wherein the liquid is added in an amount of 0.1 to 20 mL per 10 g of the tobacco material.

<A28> The method according to any one of <A1> to <A27>, wherein the tobacco material is cut tobacco.

<B1> A flavor component adsorbent obtainable by the method according to any one of <A1> to <A28>.

<B2> The flavor component adsorbent according to <B1>, which is in a form of a particle. <C1> A flavor molded body including the flavor component adsorbent according to <B1> and a molding material.

<D1> A method for producing a flavor molded body, including:

• • obtaining a flavor component adsorbent by the method according to any one of <A1> to <A28>; and
  • mixing the flavor component adsorbent with a molding material and molding an obtained mixture.

<C2> A flavor molded body obtainable by the method according to <D1>.

<C3> The flavor molded body according to <C1> or <C2>, which has a tablet shape or a sheet shape.

<E1> A heat-not-burn flavor inhaler including:

• • a flavor source containing the flavor component adsorbent according to <B1> or <B2> or the flavor molded body according to any one of <C1> to <C3>; and a heater for heating the flavor source.

<F1> A flavor-generating article including:

• • a flavor source containing the flavor component adsorbent according to <B1> or <B2> or the flavor molded body according to any one of <C1> to <C3>; and
  • a wrapping paper wrapped around the flavor source.

<F2> The flavor-generating article according to <F1>, further including a filter on a mouthpiece side.

<E2> A heat-not-burn flavor inhaler including:

• • the flavor-generating article according to <F1> or <F2>; and
  • a heater for heating the flavor source included in the flavor-generating article.

<E3> The heat-not-burn flavor inhaler according to <E1>, further including a liquid storage portion for storing a liquid aerosol source to be supplied to the flavor source,

• • wherein the heater heats the flavor source to which the aerosol source has been supplied, atomizing the aerosol source and releasing the flavor components from the flavor source.

EXAMPLES

Example 1

In Example 1, effects of the flavor component

adsorbent and the flavor molded body each serving as a flavor source were checked.

1-1. Preparation of Flavor Component Adsorbent

(Heating Step)

Cut tobacco was coarsely crushed to obtain coarsely crushed tobacco having a size of 1.00 to 3.35 mm. Glycerin was added to the coarsely crushed tobacco in an amount of 10 mass % based on the coarsely crushed tobacco.

20 g of the obtained coarsely crushed tobacco were heated at 180° C. for 30 minutes using a heating device as shown in FIG. 2. A “flavor component-containing gas” was thus generated.

(Activated Carbon-Containing Water Passing Through Step)

Using a dissolving device as shown in FIG. 3, bubbling of the flavor component-containing gas in water was conducted. 20 g of glass beads (particle size: 3 mm, density: 2.5 g/cm³) and 2 g of activated carbon (crushed, 0.2 to 1 mm, total pore volume: 1.2 mL/g, BET specific surface area: 775 m²/g) (from FUJIFILM Wako Pure Chemical Corporation, product code: 034-18051) have been added to 5 mL of the water. After the bubbling, all the contents in the container (i.e., the water, the glass beads, and the activated carbon) were collected in a beaker and stored overnight in a refrigerator at 5° C.

(Recovering Step)

Subsequently, supernatant water in the beaker was removed using a syringe. The contents remaining in the beaker (i.e., the glass beads and the activated carbon) were all moved to an aluminum dish and dried using a hot plate (100° C.) until the water was removed. After the drying, the glass beads and the activated carbon were separated from each other and the activated carbon was recovered. The recovered activated carbon has adsorbed the flavor components derived from the cut tobacco, and is called a “flavor component adsorbent”.

1-2. Preparation of Flavor Molded Body

(Tablet-Shaped Flavor Molded Body)

100 parts by mass of cellulose powder (through 38 μm (400 mesh)) (from FUJIFILM Wako Pure Chemical Corporation, product code: 036-22225), 10 parts by mass of the flavor component adsorbent obtained above, 20 parts by mass of glycerin, and 10 parts by mass of ethanol were mixed, and the obtained mixture was compression-molded into a tablet shape (diameter: 8 mm, thickness: 5 mm). The compression molding was conducted at a compression pressure of 3 kN using a compression molding machine (trade name: TDP 0, manufactured by LFA Machines Oxford Ltd.). A tablet-shaped flavor molded body was thus obtained.

(Sheet-Shaped Flavor Molded Body)

100 parts by mass of cellulose powder (through 38 μm (400 mesh)) (from FUJIFILM Wako Pure Chemical Corporation, product code: 036-22225), 10 parts by mass of the flavor component adsorbent obtained above, 16.7 parts by mass of glycerin, 3 parts by mass of guar gum (from FUJIFILM Wako Pure Chemical Corporation, product code: 073-04615), and 40 parts by mass of ion-exchanged water were kneaded together, and the obtained kneaded object was flattened by a roller to be molded into a sheet shape. The sheet-shaped molded object was subjected to drying for 10 minutes in a hot air oven set at 80° C. A sheet-shaped flavor molded body (thickness: 0.3 mm) was thus obtained.

1-3. Sensory Evaluation

200 mg of the flavor component adsorbent obtained above was put into the material chamber of a heat-not-burn flavor inhaler (trade name: PAX3, manufactured by PAX Labs), and the flavor inhaler was turned on. The flavor component adsorbent was thus heated from outside through heat transfer. A professional evaluation panel inhaled the aerosol generated by the heating and strongly sensed the characteristic flavor and taste of a tobacco distillate.

Similarly, 200 mg of the tablet-shaped flavor molded body obtained above were heated by a heat-not-burn flavor inhaler (trade name: PAX3, manufactured by PAX Labs). The professional evaluation panel inhaled the aerosol generated by the heating and strongly sensed the characteristic flavor and taste of a tobacco distillate.

Similarly, 200 mg of cut pieces from the sheet-shaped flavor molded body obtained above were heated by a heat-not-burn flavor inhaler (trade name: PAX3, manufactured by PAX Labs). The professional evaluation panel inhaled the aerosol generated by the heating and strongly sensed the characteristic flavor and taste of a tobacco distillate.

These results indicate that the flavor component adsorbent and the flavor molded body are both usable as a flavor source of a heat-not-burn flavor inhaler.

Example 2

In Example 2, comparison was made between a case of using water and a case of using polyethylene glycol as a trapping solvent for preparing the flavor component adsorbent. 2-1. Preparation of Flavor Component Adsorbent

(Case of Using Water as Trapping Solvent)

A “flavor component adsorbent” was prepared in the same manner as in Example 1. This will be called a flavor component adsorbent 2A.

(Case of Using Polyethylene Glycol as Trapping Solvent)

A “flavor component adsorbent” was prepared in the same manner as in Example 1, except that bubbling of the flavor component-containing gas was done in polyethylene glycol and the polyethylene glycol was removed by a centrifugal separator using a cell strainer, followed by 30-minute drying in a dryer set at 100° C. This will be called a flavor component adsorbent 2B.

2-2. Preparation of Flavor Molded Body

A tablet-shaped flavor molded body was prepared in the same compression molding manner as in Example 1. The flavor molded body prepared using the flavor component adsorbent 2A will be called a flavor molded body 2A. The flavor molded body prepared using the flavor component adsorbent 2B will be called a flavor molded body 2B.

2-3. Sensory Evaluation

200 mg of the flavor molded body was put into the material chamber of a heat-not-burn flavor inhaler (trade name: PAX3, manufactured by PAX Labs), and the flavor inhaler was turned on. The flavor molded body was thus heated from outside through heat transfer. The evaluation panel of 5 professionals inhaled the aerosol generated by the heating.

In the case with the flavor molded body 2A, the characteristic flavor and taste of a tobacco distillate (namely, a complex flavor where a burnt sweet scent and a green herbal note coexist) were strongly sensed since about the initial puff. The flavor lasted until about the 5th to 8th puff. The flavor became weak from the 10th puff, but the characteristics were recognizable.

On the other hand, in the case with the flavor molded body 2B, the characteristic flavor of a tobacco distillate was faintly sensed at the first puff. The faint sensing of the characteristic flavor also lasted after the 2nd puff as well, but only for a “burnt” portion of the characteristic flavor of the tobacco distillate.

These results indicate that the activated carbon was able to sufficiently adsorb the flavor components derived from the tobacco material in the case of using water as a trapping solvent, while it could not sufficiently adsorb the flavor components derived from the tobacco material in the case of using polyethylene glycol as a trapping solvent.