WO2024024081A1 - Reconstituted tobacco for non-combustion heating-type flavor inhaler and method for manufacturing same, non-combustion heating-type flavor inhaler, and non-combustion heating-type flavor inhaling system - Google Patents

Abstract

Provided is a reconstituted tobacco enabling control of power consumption per one non-combustion heating-type flavor inhaler during use. The reconstituted tobacco for a non-combustion heating-type flavor inhaler contains a carbonized tobacco and a tobacco component, wherein the carbonized tobacco has a maximum absorbance of 0.17 or less in the wavelength range of 3200 to 3600 cm-1 in a FT-IR analysis.

Description

Regenerated tobacco for non-combustion heated flavor inhaler and its manufacturing method, non-combustible heated flavor inhaler, and non-combustible heated flavor inhale system

The present invention relates to a regenerated tobacco for use in a non-combustion heating type flavor inhaler, a method for manufacturing the same, a non-combustion heating type flavor inhaler, and a non-combustion heating type flavor inhaler system.

In combustion-type flavor inhalers (cigarettes), flavor is obtained by burning tobacco filler containing leaf tobacco. As an alternative to the combustion type flavor inhaler, a non-combustion heating type flavor inhaler has been proposed, which obtains flavor by heating the tobacco filling instead of burning it. The heating temperature of the non-combustion heating type flavor inhaler is lower than the combustion temperature of the combustion type flavor inhaler, for example, about 400° C. or less. As described above, since the heating temperature of the non-combustion heating type flavor inhaler is low, an aerosol generating agent such as glycerin is added to the tobacco filling in the non-combustion heating type flavor inhaler from the viewpoint of increasing the amount of smoke. The aerosol generator is vaporized by heating and generates an aerosol. Since the aerosol is supplied to the user along with a flavor component such as a tobacco component, the user can obtain a sufficient flavor.

A non-combustion heated flavor inhaler can be used by heating a tobacco-containing segment filled with tobacco filler, for example, with a heater of a heating device. The heating device usually has a battery unit, and the heater is heated by supplying electric power from the battery unit. From the viewpoint of user convenience, when using a non-combustion heated flavor inhaler using a heating device, it is desirable to suppress power consumption and increase the usable time and number of usable flavor inhalers.

JP2019-213531A

One way to reduce power consumption without changing the size of the product is to improve the tobacco materials contained in non-combustion heated flavor inhalers, thereby reducing the amount of electricity consumed per non-combustion heated flavor inhaler. It is possible to suppress consumption.

On the other hand, recycled tobacco is an example of a tobacco material used in a non-combustion heated flavor inhaler. As a method for producing recycled tobacco, for example, Patent Document 1 discloses pyrolyzing tobacco material to produce charcoal and steam products, and condensing and collecting the steam products to yield tobacco-derived pyrolysis oil. , discloses a method of adding said pyrolysis oil to tobacco material or non-tobacco plant material as a base material.

An object of the present invention is to provide a regenerated cigarette, a non-combustion heating flavor suction device, and a non-combustion heating flavor suction system that can suppress power consumption per non-combustion heating flavor suction device during use. shall be.

The present invention includes the following embodiments.

[1] Regenerated tobacco for use in a non-combustion heating flavor inhaler, which includes carbonized tobacco and a tobacco component,
The carbonized tobacco is a recycled tobacco whose maximum absorbance at a wavelength of 3200 to 3600 cm ^-1 is 0.17 or less as determined by FT-IR analysis.

[2] The recycled tobacco according to [1], wherein the carbonized tobacco has a specific heat of 5 mJ/mg·°C or less.

[3] The recycled tobacco according to [1] or [2], wherein the carbonized tobacco has an angle of repose of 40° or less.

[4] The regenerated tobacco according to any one of [1] to [3], which contains a tobacco extract obtained by extracting tobacco components from tobacco raw materials.

[5] The recycled tobacco according to any one of [1] to [4], further comprising a binder.

[6] The recycled tobacco according to any one of [1] to [5], further comprising a fiber material.

[7] The recycled tobacco according to any one of [1] to [6], which is a sheet-shaped recycled tobacco or a shredded sheet-shaped recycled tobacco obtained by cutting the sheet-shaped recycled tobacco.

[8] A non-combustion heated flavor inhaler comprising a tobacco-containing segment filled with the recycled tobacco according to any one of [1] to [7].

[9] The non-combustion heated flavor inhaler according to [8],
a heating device for heating the tobacco-containing segment;
A non-combustion heated flavor suction system.

[10] The method for producing recycled tobacco according to any one of [1] to [7],
a step of extracting tobacco components from tobacco raw materials to obtain tobacco extract and tobacco residue;
heating the tobacco residue at 180 to 350°C for 2 to 5 hours in an atmosphere with an oxygen concentration of 8% or less to obtain carbonized tobacco;
applying the tobacco extract liquid back onto the carbonized tobacco;
including methods.

According to the present invention, it is possible to provide a recycled tobacco, a non-combustion heating flavor suction device, and a non-combustion heating flavor suction system that can suppress power consumption per non-combustion heating flavor suction device during use. Can be done.

It is a cross-sectional view showing an example of a non-combustion heating type flavor inhaler according to the present embodiment. An example of the non-combustion heating type flavor suction system according to the present embodiment, showing (a) a state before the non-combustion heating type flavor suction device is inserted into the heating device, and (b) heating the non-combustion heating type flavor suction device. FIG. 3 is a cross-sectional view showing a state in which the device is inserted into the device and heated. 2 is a graph showing the amount of nicotine delivered in each puff in Example 1, Comparative Example 1, and Comparative Example 3. 2 is a graph showing the amount of glycerin delivered in each puff in Example 1, Comparative Example 1, and Comparative Example 3. 2 is a graph showing the nicotine transfer rate to mainstream smoke per power consumption (energy) with respect to the specific heat of the base material of recycled cigarettes in Example 1, Comparative Example 1, and Comparative Example 3.

[Recycled cigarettes]
The regenerated tobacco according to the present embodiment is a regenerated tobacco for use in a non-combustion heating type flavor inhaler that includes carbonized tobacco and tobacco components. Here, the carbonized tobacco has a maximum absorbance of 0.17 or less at a wavelength of 3200 to 3600 cm ⁻¹ as determined by FT-IR analysis.

The present inventors have found that by using a tobacco material with a low specific heat as the tobacco material contained in a non-combustion heated flavor inhaler, the heating efficiency is improved, and as a result, the We thought that it would be possible to suppress power consumption. As a result of extensive studies, the present inventors have found that recycled tobacco containing carbonized tobacco and tobacco components, which has a maximum absorbance of 0.17 or less at wavelengths 3200 to 3600 cm ^-1 in FT-IR analysis, is a non-combustion heated type. It has been found that by using it as a tobacco material for a flavor inhaler, it is possible to suppress the power consumption per non-combustion heating flavor inhaler. In FT-IR analysis, absorption at a wavelength of 3200 to 3600 cm ⁻¹ is derived from stretching vibrations of hydroxyl groups in cellulose, hemicellulose, lignin, etc. Carbonized tobacco with a maximum absorbance of 0.17 or less in the wavelength range has a low specific heat because it has a low content of cellulose, which has a large specific heat. Therefore, by using the carbonized tobacco as a base material for recycled tobacco, the specific heat of the recycled tobacco can be reduced, and when heating the recycled tobacco, the temperature of the recycled tobacco can be increased with less electric power. Therefore, the power consumption per non-combustion heated flavor inhaler can be suppressed. Note that "regenerated tobacco" refers to tobacco materials that are reconstituted by mixing tobacco components and other materials.

In addition to the carbonized tobacco and tobacco components, the recycled tobacco according to the present embodiment can also contain, for example, a binder, a fiber material, an aerosol generator, and the like.

(carbonized tobacco)
In this embodiment, carbonized tobacco is a carbonized tobacco raw material. Examples of tobacco raw materials include leaf tobacco, tobacco leaf veins, stems, roots, and flowers, which may be shredded or powdered. The type of leaf tobacco is not particularly limited, and any variety can be used, but examples include yellow tobacco, burley tobacco, native tobacco, orient leaf, and fermented leaves thereof. One type of these tobacco raw materials may be used, or two or more types may be used in combination. In particular, the tobacco raw material is preferably tobacco residue after extracting a tobacco extract containing tobacco components from the tobacco raw material. This is because tobacco residue, which would normally be discarded, can be reused, reducing environmental impact and being cost-effective. Furthermore, the obtained tobacco extract can be used as a tobacco component of recycled tobacco.

The method of carbonizing the tobacco raw material is not particularly limited as long as the resulting carbonized tobacco has a maximum absorbance of 0.17 or less at a wavelength of 3200 to 3600 cm ^-1 in FT-IR analysis. For example, tobacco raw materials can be carbonized by heating them under predetermined conditions in a low oxygen atmosphere. When tobacco residue is used as a tobacco raw material, the tobacco residue can be carbonized, for example, by a method for producing recycled tobacco according to the present embodiment, which will be described later.

The carbonized tobacco according to the present embodiment has a maximum absorbance of 0.17 or less at a wavelength of 3200 to 3600 cm ⁻¹ in Fourier transform infrared spectroscopy (FT-IR) analysis. Since the maximum absorbance in the wavelength range of 3200 to 3600 cm ^-1 is 0.17 or less, which is derived from the stretching vibration of hydroxyl groups in cellulose, hemicellulose, lignin, etc., the specific heat of carbonized tobacco can be reduced, and the specific heat of the entire recycled tobacco can be reduced. Therefore, the power consumption per non-combustion heating type flavor inhaler can be suppressed. The maximum absorbance at the wavelength of 3200 to 3600 cm ⁻¹ is preferably 0.16 or less, more preferably 0.15 or less. The lower limit of the range of maximum absorbance at wavelengths of 3200 to 3600 cm ⁻¹ is not particularly limited, but may be, for example, 0.01 or more.

FT-IR analysis of carbonized tobacco can be performed by the following method. A sample of carbonized tobacco is brought into close contact with a diamond crystal for ATR measurement, and its infrared absorption spectrum is measured. As the measuring device, a Fourier transform infrared spectrometer (trade name: Thermo Scientific Nicolet iS50, manufactured by Thermo Scientific) can be used. Measurement method: ATR method, resolution: 4 cm ⁻¹ , number of integrations: 32 times (n=2).

The specific heat of the carbonized tobacco is preferably 5 mJ/mg·°C or less. When the specific heat is 5 mJ/mg·° C. or less, the specific heat of the entire recycled tobacco can be sufficiently reduced, and the power consumption per non-combustion heating flavor inhaler can be further suppressed. The specific heat is more preferably 4 mJ/mg·°C or less, even more preferably 3 mJ/mg·°C or less, and particularly preferably 2 mJ/mg·°C or less. The lower the specific heat is, the more preferable it is, and the lower limit of the range of the specific heat is not particularly limited, but can be, for example, 0.1 mJ/mg·°C or more.

The specific heat of carbonized tobacco is indicated by the maximum specific heat capacity (mJ/mg·°C) up to 300°C, as measured by DSC (differential scanning calorimetry). For example, it can be measured using a differential scanning calorimeter (trade name: DSC7020, manufactured by Hitachi High-Tech Science Co., Ltd.) under the following conditions. Temperature increase rate: 10° C./min, holding time: 2 minutes, pan: Al, sample mass: 10 mg, reference: Al ₂ O ₃ .

The angle of repose of the carbonized tobacco is preferably 40° or less. When the angle of repose is 40° or less, it becomes easier to input the raw material when inputting the raw material in the production of recycled tobacco, which is preferable in terms of production. The angle of repose is more preferably 10 to 40°, and even more preferably 20 to 40°.

The angle of repose of carbonized tobacco can be measured by the following method. A sample of carbonized tobacco was dropped using a funnel from 4 cm above a 25 mm x 25 mm measuring table (peak material). Once the sample is dropped from the measuring table to the extent that it spills, a photograph is taken and the angle is measured using image analysis software (Keyence Microscope). This measurement is carried out three times, and the average value is taken as the value of the angle of repose.

The amount of carbonized tobacco contained in the recycled tobacco is preferably 20 to 80% by mass, more preferably 20 to 65% by mass, and 30 to 50% by mass when the mass of the recycled tobacco is 100% by mass. % is more preferable.

(Tobacco ingredient)
The tobacco component is a tobacco-derived component contained in the tobacco raw material, and main components include components that contribute to aroma and taste. Although the recycled tobacco according to the present embodiment may contain tobacco components alone, it is preferable to contain them as a tobacco extract obtained by extracting tobacco components from tobacco raw materials. In this case, the tobacco residue after extracting the tobacco extract can be used as a raw material for carbonized tobacco, which reduces environmental impact and is also advantageous in terms of cost. The amount of tobacco components contained in the recycled tobacco can be appropriately set depending on the desired flavor.

(binder)
The recycled tobacco according to this embodiment preferably contains a binder. Since the recycled tobacco contains a binder, each raw material can be bonded together, and the recycled tobacco can be suitably molded into a desired shape. The type of binder is not particularly limited, but examples include guar gum, xanthan gum, CMC (carboxymethylcellulose), CMC-Na (sodium salt of carboxymethylcellulose), waxy corn starch, and potato. These may be used alone or in combination of two or more. The amount of binder contained in the recycled tobacco is preferably 1 to 10% by mass, more preferably 3 to 6% by mass, when the mass of the recycled tobacco is 100% by mass.

(fiber material)
Preferably, the recycled tobacco according to this embodiment includes a fiber material. Since the recycled tobacco contains a fiber material, the recycled tobacco can be easily formed and its shape can be maintained. Although the type of fiber material is not particularly limited, an example thereof is pulp. As the pulp, in addition to wood pulp such as softwood pulp and hardwood pulp, non-wood pulps such as flax pulp, sisal pulp, and espart, which are generally used for wrapping paper for tobacco products, may be used in combination. The amount of fiber material contained in the recycled tobacco is preferably 1 to 15% by mass, more preferably 3 to 10% by mass, when the mass of the recycled tobacco is 100% by mass.

(aerosol generator)
The recycled tobacco according to this embodiment can contain an aerosol generator. The term "aerosol generator" refers to a material that generates an aerosol by being cooled after being heated. Examples of the aerosol generator include polyhydric alcohols such as glycerin, propylene glycol, sorbitol, xylitol, and erythritol, triacetin, and 1,3-butanediol. These may be used alone or in combination of two or more. The amount of the aerosol generating agent contained in the recycled tobacco is preferably 5 to 40% by mass, more preferably 10 to 25% by mass, when the mass of the recycled tobacco is 100% by mass.

(Other materials)
In addition to the carbonized tobacco, the tobacco component, the binder, the fiber material, and the aerosol generator, the recycled tobacco according to the present embodiment may also contain other materials, such as a flavoring agent. The type of flavoring agent is not particularly limited, and from the viewpoint of imparting good flavor, menthol is particularly preferred. Moreover, one type of fragrance may be used alone, or two or more types may be used in combination. The amount of other materials contained in the recycled tobacco is preferably 10% by mass or less, more preferably 5% by mass or less, when the mass of the recycled tobacco is 100% by mass. The recycled tobacco according to this embodiment does not need to contain any other materials.

(Shape of recycled cigarettes)
The recycled tobacco according to the present embodiment is preferably a sheet-shaped recycled tobacco, or a sheet-shaped recycled tobacco obtained by cutting the sheet-shaped recycled tobacco. Because recycled tobacco is in sheet form, each component such as carbonized tobacco, tobacco components, binder, and aerosol generator can be homogenized, and when heated, the aerosol generator and flavor components are efficiently heated and atomized. be able to. Further, by cutting the sheet into pieces, it is possible to obtain manufacturing suitability such as increased efficiency during winding. When the recycled tobacco is in the form of a sheet, the length and width of the sheet are not particularly limited and can be adjusted as appropriate depending on the manner of filling. When the recycled tobacco is cut into sheets, the width of the cut sheets can be 0.4 to 1.5 mm, and the length of the cut sheets can be 5 to 15 mm, for example. The thickness of the sheet or sheet cut is preferably 50 to 800 μm, more preferably 100 to 600 μm, in view of the balance between heat transfer efficiency and strength.

Furthermore, the recycled tobacco according to this embodiment may be a nonwoven tobacco sheet (laminate sheet). The laminate sheet is obtained by sandwiching a mixture containing carbonized tobacco, tobacco components, and a binder between nonwoven fabrics, and molding the resulting laminate into a certain shape by heat welding.

[Method for manufacturing recycled cigarettes]
The method for producing recycled tobacco according to this embodiment includes the following steps. A process of extracting tobacco components from tobacco raw materials to obtain a tobacco extract and tobacco residue (hereinafter also referred to as "extraction process"); A step of heating for 2 to 5 hours to obtain carbonized tobacco (hereinafter also referred to as "carbonization step"); a step of pouring the tobacco extract back onto the carbonized tobacco (hereinafter also referred to as "returning step"). According to the method, the recycled tobacco according to the present embodiment can be manufactured simply and efficiently. Moreover, environmental load and costs can be reduced. The method according to the present embodiment may include other steps, such as a molding step, in addition to the extraction step, carbonization step, and return step.

(Extraction process)
In this step, tobacco components are extracted from tobacco raw materials to obtain tobacco extract and tobacco residue. The method for extracting tobacco components from tobacco raw materials is not particularly limited, but for example, tobacco components can be extracted by immersing tobacco raw materials in a solvent. Alternatively, tobacco components may be volatilized from the tobacco raw material by heating the tobacco raw material, and the vapor may be recovered.

When tobacco components are extracted by immersing tobacco raw materials in a solvent, examples of the solvent include water, alcohol such as ethanol, and ethyl acetate. The extraction temperature and extraction time depend on the extraction solvent, but can be, for example, 10 to 60°C for 1 to 3 hours. When heating tobacco raw materials to volatilize tobacco components from the tobacco raw materials and recovering the vapor, the heating temperature of the tobacco materials can be, for example, 150 to 300°C. The steam recovery method is not particularly limited, but for example, the generated steam may be cooled and recovered, or the generated vapor may be passed through a solvent such as distilled water, ethanol, hexane, 2-propanol, 1-propanol, propylene glycol, or glycerin. Examples include methods such as collecting the product in the solvent, collecting the product using an adsorbent, column, filter, etc., and then eluting it.

(Carbonization process)
In this step, the tobacco residue obtained in the extraction step is heated at 180 to 350° C. for 2 to 5 hours in an atmosphere with an oxygen concentration of 8% or less to obtain carbonized tobacco. The tobacco residue is heated in an atmosphere with an oxygen concentration of 8% or less. By performing heating in a low-oxygen atmosphere with an oxygen concentration of 8% or less, tobacco residue can be sufficiently carbonized. More preferably, the tobacco residue is heated in an oxygen-free atmosphere (for example, an inert gas atmosphere such as nitrogen or argon).

The heating temperature of tobacco residue is 180 to 350°C. By setting the heating temperature to 180° C. or higher, the tobacco residue can be sufficiently carbonized, and the maximum absorbance at a wavelength of 3200 to 3600 cm ⁻¹ in FT-IR analysis can easily be within the range of this embodiment. Further, since the heating temperature is 350° C. or less, the resulting carbonized tobacco does not become brittle, resulting in high handling properties and excellent manufacturing suitability. The heating temperature is preferably 180 to 260°C, more preferably 200 to 230°C. In addition, when the heating temperature is 500° C. or higher, the resulting carbonized tobacco tends to become brittle and has low handling properties, resulting in poor manufacturing suitability.

The heating time for tobacco residue is 2 to 5 hours. By setting the heating time to 2 hours or more, the tobacco residue can be sufficiently carbonized, and the maximum absorbance at a wavelength of 3200 to 3600 cm ⁻¹ in FT-IR analysis can be easily set within the range of this embodiment. Further, since the heating time is 5 hours or less, the resulting carbonized tobacco does not become brittle, resulting in high handling properties and excellent manufacturing suitability. The heating time is preferably 2 to 4 hours, more preferably 2 to 3 hours.

(Returning process)
In this step, the tobacco extract liquid is poured back onto the carbonized tobacco. Through this step, the tobacco components previously extracted from the tobacco raw material are returned to the carbonized tobacco. Regenerated tobacco with a low specific heat can be obtained by using carbonized tobacco with a low specific heat as a base material and returning tobacco components to the base material. The method of applying the tobacco extract back onto the carbonized tobacco is not particularly limited. For example, tobacco extract can be added to carbonized tobacco and mixed, and the carbonized tobacco can be soaked with the tobacco extract to recombine. After being recombined, the carbonized tobacco containing the tobacco extract may be dried.

(molding process)
In the method according to the present embodiment, the obtained recycled tobacco may be formed into a sheet shape, shredded sheet shape, or the like. For example, it is possible to mix carbonized tobacco containing tobacco components obtained through a re-spinning process, the binder, and the fiber material, and form the mixture into a sheet by a known method such as a papermaking method, a casting method, or a rolling method. can. Further, by cutting recycled tobacco that has been formed into a sheet, it can be formed into a shredded sheet.

[Non-combustion heated flavor inhaler]
The non-combustion heated flavor inhaler according to the present embodiment includes a tobacco-containing segment filled with the recycled tobacco according to the present embodiment. Since the non-combustion heated flavor inhaler according to the present embodiment includes the tobacco-containing segment filled with the recycled tobacco according to the present embodiment, when heating the tobacco-containing segment, the temperature of the tobacco-containing segment can be increased with less electric power. can be raised. Therefore, the power consumption per non-combustion heated flavor inhaler can be suppressed.

FIG. 1 shows an example of the non-combustion heating type flavor inhaler according to this embodiment. A non-combustion heated flavor inhaler 1 shown in FIG. 1 includes a tobacco-containing segment 2 filled with recycled tobacco according to the present embodiment, a cylindrical cooling segment 3 having perforations 8 on the circumference, and a center hole segment. 4 and a filter segment 5. The non-combustion heated flavor inhaler according to the present embodiment may have other segments in addition to the tobacco-containing segment, the cooling segment, the center hole segment, and the filter segment.

The axial length of the non-combustion heated flavor inhaler according to this embodiment is not particularly limited, but is preferably 40 mm or more and 90 mm or less, more preferably 50 mm or more and 75 mm or less, 50 mm or more, More preferably, it is 60 mm or less. Further, the circumferential length of the non-combustion heating type flavor inhaler is preferably 16 mm or more and 25 mm or less, more preferably 20 mm or more and 24 mm or less, and even more preferably 21 mm or more and 23 mm or less. For example, an embodiment may be mentioned in which the tobacco-containing segment has a length of 20 mm, the cooling segment has a length of 20 mm, the center hole segment has a length of 8 mm, and the filter segment has a length of 7 mm. Note that the length of the filter segment can be selected within the range of 4 mm or more and 10 mm or less. Further, the ventilation resistance of the filter segment at this time can be selected to be 15 mmH ₂ O/seg or more and 60 mmH ₂ O/seg or less per segment. These individual segment lengths can be changed as appropriate depending on manufacturing suitability, required quality, etc. Furthermore, even if only the filter segment is disposed downstream of the cooling segment without using the center hole segment, it is possible to function as a non-combustion heated flavor inhaler.

(Tobacco-containing segment)
In the tobacco-containing segment 2, recycled tobacco according to the present embodiment is filled in a wrapping paper (hereinafter also referred to as a wrapper). The method of filling the recycled tobacco into the paper is not particularly limited, but for example, the recycled tobacco may be wrapped in a wrapper, or the recycled tobacco may be filled in a cylindrical wrapper. When the shape of the recycled tobacco has a longitudinal direction such as a rectangular shape, the recycled tobacco may be packed so that the longitudinal direction is in an unspecified direction within the wrapper, and the recycled tobacco may be packed in the axial direction of the tobacco-containing segment 2 or They may be packed in alignment in a direction perpendicular to the axial direction.

(cooling segment)
As shown in FIG. 1, the cooling segment 3 may include a cylindrical member 7. The cylindrical member 7 may be, for example, a paper tube made of cardboard processed into a cylindrical shape.

The cylindrical member 7 and the mouthpiece lining paper 12, which will be described later, are provided with perforations 8 that pass through them both. Due to the presence of the perforations 8, outside air is introduced into the cooling segment 3 during suction. As a result, the vaporized aerosol component generated by heating the tobacco-containing segment 2 comes into contact with the outside air, and as its temperature decreases, it liquefies and forms an aerosol. The diameter (cross-length) of the perforation 8 is not particularly limited, but may be, for example, 0.5 mm or more and 1.5 mm or less. The number of perforations 8 is not particularly limited, and may be one or two or more. For example, a plurality of perforations 8 may be provided around the circumference of the cooling segment 3.

The amount of outside air introduced through the perforations 8 is preferably 85% by volume or less, more preferably 80% by volume or less, based on the volume of the entire gas sucked by the user. When the ratio of the amount of outside air is 85% by volume or less, reduction in flavor due to dilution by outside air can be sufficiently suppressed. Note that this is also called the ventilation ratio in another way. From the viewpoint of cooling performance, the lower limit of the ventilation ratio range is preferably 55% by volume or more, more preferably 60% by volume or more.

The cooling segment may also be a segment comprising a sheet of suitable construction material that is crimped, pleated, gathered, or folded. The cross-sectional profile of such elements may exhibit randomly oriented channels. The cooling segment may also include a bundle of longitudinally extending tubes. Such cooling segments can be formed, for example, from pleated, gathered, or folded sheet material wrapped in a paper wrapper.

The axial length of the cooling segment can be, for example, 7 mm or more and 28 mm or less, and can be, for example, 18 mm. The cooling segment can also be substantially circular in its axial cross-sectional shape, and its diameter can be, for example, greater than or equal to 5 mm and less than or equal to 10 mm, such as about 7 mm.

(center hole segment)
The center hole segment is composed of a filling layer having one or more hollow portions and an inner plug wrapper covering the filling layer. For example, as shown in FIG. 1, the center hole segment 4 includes a first filling layer 9 having a hollow portion and a first inner plug wrapper 10 covering the first filling layer 9. The center hole segment 4 has the function of increasing the strength of the mouthpiece segment 6. The first packed layer 9 has an inner diameter of 1.0 mm, for example, filled with cellulose acetate fibers at high density and hardened by adding a plasticizer containing triacetin from 6% by mass to 20% by mass based on the mass of cellulose acetate. As described above, the rod can have a diameter of 5.0 mm or less. Since the first packed layer 9 has a high packing density of fibers, during suction, air and aerosol flow only through the hollow portion, and hardly flow inside the first packed layer 9. Since the first filling layer 9 inside the center hole segment 4 is a fiber filling layer, the feel of the device from the outside during use is less likely to cause discomfort to the user. Note that the center hole segment 4 may not have the first inner plug wrapper 10 and its shape may be maintained by thermoforming.

(filter segment)
The structure of the filter segment 5 is not particularly limited, but may be composed of a single or plural filling layers. The outside of the packed layer may be wrapped with one or more wrapping papers. The ventilation resistance per segment of the filter segment 5 can be changed as appropriate depending on the amount of filler filled in the filter segment 5, the material, etc. For example, if the filling is cellulose acetate fibers, increasing the amount of cellulose acetate fibers filled into the filter segment 5 can increase the ventilation resistance. When the filling is cellulose acetate fibers, the packing density of the cellulose acetate fibers can be 0.13-0.18 g/cm ³ . Note that the ventilation resistance is a value measured by a ventilation resistance measuring device (trade name: SODIMAX, manufactured by SODIM).

The circumferential length of the filter segment 5 is not particularly limited, but is preferably 16 to 25 mm, more preferably 20 to 24 mm, and even more preferably 21 to 23 mm. The length of the filter segment 5 in the axial direction can be selected from 4 to 10 mm, and is selected so that its ventilation resistance is 15 to 60 mmH ₂ O/seg. The length of the filter segment 5 in the axial direction is preferably 5 to 9 mm, more preferably 6 to 8 mm. The cross-sectional shape of the filter segment 5 is not particularly limited, but may be, for example, circular, elliptical, polygonal, or the like. Further, a rupturable capsule containing a fragrance, fragrance beads, or a fragrance may be directly added to the filter segment 5.

As shown in FIG. 1, the center hole segment 4 and the filter segment 5 can be connected with an outer plug wrapper (outer wrapping paper) 11. The outer plug wrapper 11 can be, for example, cylindrical paper. Further, the tobacco-containing segment 2, the cooling segment 3, and the connected center hole segment 4 and filter segment 5 can be connected by a mouthpiece lining paper 12. These connections can be made, for example, by applying glue such as vinyl acetate glue to the inner surface of the mouthpiece lining paper 12, inserting the three segments, and winding the paper. Note that these segments may be connected multiple times using multiple lining papers.

[Non-combustion heated flavor suction system]
The non-combustion heating type flavor inhaler system according to the present embodiment includes the non-combustion heating type flavor inhaler according to the present embodiment, and a heating device that heats the tobacco-containing segment of the non-combustion heating type flavor inhaler. Since the non-combustion heated flavor suction system according to the present embodiment includes the non-combustion heated flavor suction device according to the present embodiment, it is possible to suppress power consumption per non-combustion heated flavor suction device. . The non-combustion heating type flavor suction system according to this embodiment may have other configurations in addition to the non-combustion heating type flavor inhaler and the heating device according to this embodiment.

An example of the non-combustion heating type flavor suction system according to this embodiment is shown in FIG. 2. The non-combustion heated flavor suction system shown in FIG. 2 includes a non-combustion heated flavor suction device 1 according to the present embodiment, and a heating device 13 that heats the tobacco-containing segment of the non-combustion heated flavor suction device 1 from the outside. Equipped with.

FIG. 2(a) shows the state before the non-combustion heating type flavor inhaler 1 is inserted into the heating device 13, and FIG. 2(b) shows the state before the non-combustion heating type flavor inhaler 1 is inserted into the heating device 13 and heated. Indicates the state of The heating device 13 shown in FIG. 2 includes a body 14, a heater 15, a metal tube 16, a battery unit 17, and a control unit 18. The body 14 has a cylindrical recess 19, and a heater 15 and a metal tube are installed on the inner side of the recess 19 at a position corresponding to the tobacco-containing segment of the non-combustion heated flavor inhaler 1 inserted into the recess 19. 16 are arranged. The heater 15 can be an electric resistance heater, and electric power is supplied from the battery unit 17 in response to instructions from a control unit 18 that performs temperature control, and the heater 15 is heated. Heat emitted from the heater 15 is transferred to the tobacco-containing segment of the non-combustion heated flavor inhaler 1 through a metal tube 16 with high thermal conductivity.

In FIG. 2(b), since it is schematically illustrated, there is a gap between the outer periphery of the non-combustion heating type flavor inhaler 1 and the inner periphery of the metal tube 16, but in reality, heat can be efficiently dissipated. For the purpose of transmitting flavor, it is preferable that there be no gap between the outer periphery of the non-combustion heating type flavor inhaler 1 and the inner periphery of the metal tube 16. Although the heating device 13 heats the tobacco-containing segment of the non-combustion heating flavor inhaler 1 from the outside, it may also heat the tobacco-containing segment from the inside.

The heating temperature by the heating device is not particularly limited, but is preferably 400°C or less, more preferably 150°C or more and 400°C or less, and even more preferably 200°C or more and 350°C or less. Note that the heating temperature refers to the temperature of the heater of the heating device.

Hereinafter, the present embodiment will be described in detail with reference to examples, but the present embodiment is not limited to these examples. In the FT-IR analysis, the measurement of the maximum absorbance at a wavelength of 3200 to 3600 cm ^-1 , the measurement of the angle of repose, and the measurement of specific heat were performed by the following method.

[Measurement of maximum absorbance at wavelength 3200 to 3600 cm ⁻¹ in FT-IR analysis]
The maximum absorbance at a wavelength of 3200 to 3600 cm ⁻¹ in FT-IR analysis of carbonized tobacco was measured by the following method. A sample of carbonized tobacco was brought into close contact with a diamond crystal for ATR measurement, and its infrared absorption spectrum was measured. As a measuring device, a Fourier transform infrared spectrometer (trade name: Thermo Scientific Nicolet iS50, manufactured by Thermo Scientific) was used. Measurement method: ATR method, resolution: 4 cm ⁻¹ , number of integrations: 32 times (n=2).

[Measurement of angle of repose]
The angle of repose of carbonized tobacco was measured by the following method. A sample of carbonized tobacco was dropped using a funnel from 4 cm above a 25 mm x 25 mm measurement stand (peak material). When the sample was dropped from the measuring table to the extent that it spilled, a photograph was taken and the angle was measured using image analysis software (Keyence Microscope). This measurement was performed three times, and the average value was taken as the value of the angle of repose.

[Measurement of specific heat]
As the specific heat of carbonized tobacco, the maximum specific heat capacity (mJ/mg·°C) up to 300°C was measured by DSC (differential scanning calorimetry). Specifically, the measurement was performed using a differential scanning calorimeter (trade name: DSC7020, manufactured by Hitachi High-Tech Science Co., Ltd.) under the following conditions. Temperature increase rate: 10° C./min, holding time: 2 minutes, pan: Al, sample mass: 10 mg, reference: Al ₂ O ₃ .

[Example 1]
(Preparation of recycled tobacco)
Yellow leaves were prepared as tobacco raw material. Water in an amount 12 times the weight of the raw material was added to the tobacco raw material, and the mixture was stirred at 50° C. and 300 rpm for 1 hour. Thereafter, the extract was collected by hand squeezing. As a result, tobacco components were extracted from the tobacco raw material, and tobacco extract and tobacco residue were obtained. Next, the tobacco residue was placed in an oven, and the tobacco residue was heated at 230° C. while flowing a mixed gas of N ₂ :Air=92%:8% (oxygen concentration: 1.7%) at a rate of 1 L/min. Heated for 3 hours. As a result, the tobacco residue was carbonized to obtain carbonized tobacco. Regarding the carbonized tobacco, the maximum absorbance at a wavelength of 3200 to 3600 cm ⁻¹ in FT-IR analysis, the angle of repose, and the specific heat were measured by the above method. The results are shown in Table 1.

Using the obtained carbonized tobacco as a base material, the tobacco extract was poured back onto the carbonized tobacco. 100 parts by mass of carbonized tobacco on which tobacco extract has been applied, 3.7 parts by mass of guar gum as a binder, 3.7 parts by mass of softwood pulp as a fiber material, and 14 parts of glycerin as an aerosol generator. 6 parts by mass were mixed and molded into a sheet by a casting method. As described above, a sheet-shaped recycled tobacco was prepared. The thickness of the recycled tobacco was 500 μm, the density was 0.65 mg WB/mm ³ , the basis weight was 327 g WB/m ² , the glycerin content was 11.7 mass % WB, and the water content was 12.8 mass % WB.

(evaluation)
The sheet-shaped recycled tobacco was filled into the tobacco-containing segment 2 of the non-combustion heating type flavor inhaler 1 shown in FIG. 1 to obtain a non-combustion heating type flavor inhaler. A heating test was conducted on the non-combustion heated flavor inhaler, and the amount of nicotine delivered and the amount of glycerin delivered were measured. Specifically, the non-combustion heating type flavor inhaler 1 was inserted into the heating device 13 shown in FIG. 2, and the tobacco-containing segment was heated to 200°C. After preheating for 30 seconds, the amount of nicotine and glycerin contained in the inhaled mainstream smoke was measured by inhaling from the mouthpiece of the non-combustion heating type flavor inhaler 1. A suction machine (trade name: RM-20, manufactured by Borgwaldt) was used for suction. Suction (puffing) was performed once every 30 seconds with 55 ml for 2 seconds, a total of 10 times, and the amount of nicotine and glycerin was measured for each puff. The nicotine amount and glycerin amount were measured using GC-FID. The amount of nicotine delivered in each puff is shown in FIG. 3, and the amount of glycerin delivered in each puff is shown in FIG. 4. Furthermore, Table 1 shows the nicotine transfer rate to mainstream smoke per unit of power consumption (energy). However, nicotine and glycerin are shown as component indicators from among a plurality of components contained in the regenerated tobacco in this embodiment, and nicotine and glycerin are not particularly easily delivered.

[Comparative example 1]
In the production of carbonized tobacco, sheet-shaped recycled tobacco was prepared and evaluated in the same manner as in Example 1, except that the tobacco residue was heated at 230° C. for 1 hour. The results are shown in Table 1, FIG. 3, and FIG. 4.

[Comparative example 2]
The tobacco extract obtained in Example 1 was added to activated carbon (trade name: Kuraray Coal, manufactured by Kuraray Co., Ltd.). A sheet-shaped recycled tobacco sheet was prepared in the same manner as in Example 1, except that the activated carbon was used instead of carbonized tobacco on which tobacco extract had been applied. Table 1 shows the measurement results of the specific heat of activated carbon itself.

[Comparative example 3]
A tobacco extract and tobacco residue were obtained in the same manner as in Example 1. Thereafter, the tobacco extract was poured back onto the tobacco residue without carbonizing the tobacco residue. Other than that, a sheet-shaped recycled tobacco was prepared and evaluated in the same manner as in Example 1. Table 1 shows the measurement results of each physical property of the tobacco residue itself. Furthermore, the evaluation results of the non-combustion heating type flavor inhaler are shown in FIGS. 3, 4, and Table 1.

[Comparative example 4]
The tobacco extract obtained in Example 1 was added to cellulose (trade name: cellulose powder, manufactured by Nacalai Tesque Co., Ltd.). A sheet-shaped regenerated tobacco was prepared in the same manner as in Example 1, except that the cellulose was used instead of carbonized tobacco on which tobacco extract had been applied. Table 1 shows the measurement results of the specific heat of cellulose itself.

As shown in FIGS. 3 and 4, in Example 1, recycled tobacco was prepared using carbonized tobacco as a base material, which had a maximum absorbance of 0.17 or less at a wavelength of 3200 to 3600 cm ⁻¹ in FT-IR analysis. In an evaluation of a non-combustion heated flavor inhaler containing recycled tobacco, it was found that the amount of nicotine and glycerin delivered was particularly large when the number of puffs increased. Additionally, the rate of nicotine transfer to mainstream smoke per unit of power consumption (energy) was also high (Table 1). On the other hand, in Comparative Examples 1 and 3, in which recycled tobacco was prepared using carbonized tobacco or tobacco residue, which had a maximum absorbance of more than 0.17 at a wavelength of 3200 to 3600 cm ^-1 as determined by FT-IR analysis, the recycled tobacco was In the evaluation of the non-combustion heated flavor inhaler, the amounts of nicotine and glycerin delivered were smaller than in Example 1 (FIGS. 3 and 4). Therefore, the nicotine transfer rate to mainstream smoke per unit of power consumption (energy) was lower than in Example 1 (Table 1). As shown in the graph of FIG. 5, which shows the nicotine transfer rate to mainstream smoke per power consumption (energy) with respect to the specific heat of the base material of recycled tobacco, in Example 1, the maximum It can be understood that when the absorbance is 0.17 or less, the specific heat of the base material is low, and as a result, the nicotine transfer rate to mainstream smoke per unit of power consumption (energy) is improved. Further, from Table 1, it was found that the base material of Example 1 had a lower angle of repose than the base materials of Comparative Examples 1 and 3, making it easier to input raw materials when inputting raw materials, and having excellent manufacturing suitability.

1 Non-combustion heated flavor inhaler 2 Tobacco-containing segment 3 Cooling segment 4 Center hole segment 5 Filter segment 6 Mouthpiece segment 7 Cylindrical member 8 Perforation 9 First filling layer 10 First inner plug wrapper 11 Outer plug wrapper 12 Mouthpiece lining paper 13 Heating device 14 Body 15 Heater 16 Metal tube 17 Battery unit 18 Control unit 19 Recess

Claims (10)

A regenerated tobacco for use in a non-combustible heated flavor inhaler containing carbonized tobacco and a tobacco component,
The carbonized tobacco is a recycled tobacco whose maximum absorbance at a wavelength of 3200 to 3600 cm ^-1 is 0.17 or less as determined by FT-IR analysis. The recycled tobacco according to claim 1, wherein the carbonized tobacco has a specific heat of 5 mJ/mg·°C or less. The recycled tobacco according to claim 1 or 2, wherein the carbonized tobacco has an angle of repose of 40° or less. The regenerated tobacco according to any one of claims 1 to 3, comprising a tobacco extract obtained by extracting tobacco components from tobacco raw materials. The recycled tobacco according to any one of claims 1 to 4, further comprising a binder. The regenerated tobacco according to any one of claims 1 to 5, further comprising a fiber material. The regenerated tobacco according to any one of claims 1 to 6, which is a regenerated tobacco sheet or a shredded regenerated tobacco obtained by cutting the regenerated tobacco sheet. A non-combustion heated flavor inhaler comprising a tobacco-containing segment filled with the recycled tobacco according to any one of claims 1 to 7. The non-combustion heated flavor inhaler according to claim 8;
a heating device for heating the tobacco-containing segment;
A non-combustion heated flavor suction system. The method for producing recycled tobacco according to any one of claims 1 to 7, comprising:
a step of extracting tobacco components from tobacco raw materials to obtain tobacco extract and tobacco residue;
heating the tobacco residue at 180 to 350°C for 2 to 5 hours in an atmosphere with an oxygen concentration of 8% or less to obtain carbonized tobacco;
applying the tobacco extract liquid back onto the carbonized tobacco;
including methods.