WO2013162028A1

WO2013162028A1 - Flavor inhalation tool and carbon heat source

Info

Publication number: WO2013162028A1
Application number: PCT/JP2013/062491
Authority: WO
Inventors: 洋介畔上; 朋広小林; 敦郎山田
Original assignee: 日本たばこ産業株式会社
Priority date: 2012-04-27
Filing date: 2013-04-26
Publication date: 2013-10-31
Also published as: JP5816360B2; TW201400040A; JPWO2013162028A1

Abstract

　A flavor inhalation tool (10) equipped with: a cylindrical holder (30) in which a flavor-generating source (40) is enclosed; and a carbon heat source (20) provided at one end part of the holder (30) in the axial (AX) direction thereof. The carbon heat source (20) is held by the holder (30) in the axial (AX) direction thereof, and has a first section (21), at least a part of which protrudes from the holder (30), and a second section (22) which is at the end part on the opposite side to the flavor-generating source (40). At least a part of the first section (21) contains a fire retardant which prevents the spread of fire from the carbon heat source (20).

Description

Flavor suction device and carbon heat source

The present invention relates to a flavor suction tool and a carbon heat source that have a carbon heat source and can suck and taste the flavor generated by the heat generated from the heat source.

Smoking articles such as cigarettes and cigars are typical flavor suction tools that generate smoke (aerosol) containing tobacco flavor components by burning tobacco leaves. In recent years, various flavor suction devices have been proposed in which a flavor generating source is heated by heat generated from a carbon heat source, and the flavor can be sucked without burning or pyrolysis of the flavor generating source.

In a flavor suction device using such a carbon heat source, a structure in which the carbon heat source is partially covered with a heat conductive element such as an aluminum alloy is known (for example, Patent Document 1). According to such a structure, the combustion of the carbon heat source can be prevented from proceeding to the contact portion with the holder containing the flavor generation source.

Further, in a flavor suction device using such a carbon heat source, a structure in which the outer peripheral portion of the carbon heat source is surrounded by a non-flammable member is also known (for example, Patent Document 2). With such a structure, even if the flavor suction tool after ignition is hit against an ashtray with a certain level of force, the carbon heat source breaks at the boundary between the combustion part (fire type) and the non-combustion part, and the fire type falls from the flavor suction tool. Can be prevented.

However, the conventional flavor suction tool described above has the following problems. That is, since the carbon heat source is covered with a heat conductive element such as an aluminum alloy, a separate member other than the carbon heat source is required, which increases the manufacturing cost.

Special Table 2010-535530 (Fig. 1) Japanese Patent Laid-Open No. 2-86759 (FIG. 1)

The first feature of the present invention is that a flavor generating source (flavor generating source 40), a cylindrical holder (holder 30) containing the flavor generating source, and one end portion in the axis (axis AX) direction of the holder ( A flavor suction tool (flavor suction tool 10) comprising a carbon heat source (carbon heat source 20) provided at the end 30e), the carbon heat source being held by the holder in the axial direction and at least partly Has a first part (first part 21) protruding from the holder and a second part (second part 22) including an end opposite to the flavor generating source, and at least one of the first parts The gist is that the part contains a fire spread inhibitor that prevents the carbon heat source from spreading.

A second feature of the present invention is a carbon heat source provided at one end portion in the axial direction of a cylindrical holder containing a flavor generating source, and is held by the holder in the axial direction, and at least a part thereof is retained. A first portion provided so as to protrude from the holder; and a second portion provided so as to include an end opposite to the flavor generating source, wherein at least a part of the first portion is the carbon. The gist is to contain a fire spread inhibitor that prevents the heat source from spreading.

The third feature of the present invention is that a flavor generating source (flavor generating source 40), a cylindrical holder (holder 30) containing the flavor generating source, and one end portion in the axis (axis AX) direction of the holder ( A flavor suction tool (flavor suction tool 10) comprising a carbon heat source (carbon heat source 20) provided at the end 30e), the carbon heat source being held by the holder in the axial direction and at least partly Has a first part (first part 21) protruding from the holder and a second part (second part 22) including an end opposite to the flavor generating source, and the carbon heat source is at least one The part contains sodium chloride, and the content of the sodium chloride in the first part with respect to the carbon heat source is required to be greater than the content of the sodium chloride with respect to the carbon heat source in the second part. To.

A fourth feature of the present invention is a carbon heat source provided at one end in the axial direction of a cylindrical holder containing a flavor generating source, and is held by the holder in the axial direction, and at least a part thereof is retained. A first portion provided so as to protrude from the holder; and a second portion including an end opposite to the flavor generating source, the carbon heat source including sodium chloride at least in part, The content rate of the sodium chloride with respect to the carbon heat source in one portion is larger than the content rate of the sodium chloride with respect to the carbon heat source in the second portion.

The fifth feature of the present invention is that a flavor generating source (flavor generating source 40), a holder (holder 30) containing the flavor generating source, and one end (end 30e) in the axis (axis AX) direction of the holder. ), And a carbon heat source (carbon heat source 20) having a protruding portion (protruding portion 23) at least a portion protruding from the holder. A carbonaceous material, an organic binder, and a reinforcing agent, wherein the reinforcing agent is nonflammable at the combustion temperature of the carbon heat source and is generated at a temperature equal to or lower than the combustion temperature of the reinforcing agent or the carbon heat source. And the organic binder contains sodium carboxymethylcellulose, and the carboxymethylcellulose sodium ether is melted below the combustion temperature of the carbon heat source. The degree and summarized in that less than 0.3.

A sixth feature of the present invention is a carbon heat source provided at one end portion in the axial direction of a cylindrical holder containing a flavor generation source, provided at one end portion in the axial direction of the holder, at least a part of which is provided. The protrusion has a protruding portion protruding from the holder, and includes a carbonaceous material, an organic binder, and a reinforcing agent. The reinforcing agent is nonflammable at the combustion temperature of the carbon heat source, and the combustion temperature of the reinforcing agent or the carbon heat source. At least one thermal decomposition product generated below melts at a temperature lower than the combustion temperature of the carbon heat source, the organic binder contains sodium carboxymethyl cellulose, and the degree of etherification of the sodium carboxymethyl cellulose is 0.3 or more. This is the gist.

FIG. 1 is a schematic perspective view of a flavor suction device according to the first embodiment. FIG. 2 is a cross-sectional view along the axial direction of the flavor suction device according to the first embodiment. FIG. 3 is a diagram illustrating a schematic configuration of a test sample of a carbon heat source according to an example of the first embodiment. FIG. 4 is a diagram illustrating a schematic configuration of a smoker and a carbon heat source according to an example of the first embodiment. FIG. 5 is a cross-sectional view along the axial direction of the carbon heat source according to the modified example of the first embodiment. FIG. 6 is a schematic perspective view of a flavor suction device according to the second embodiment. FIG. 7 is a cross-sectional view along the axial direction of the flavor suction device according to the second embodiment. FIG. 8 is a cross-sectional view along the axial direction of the carbon heat source according to the modified example of the second embodiment. FIG. 9 is a schematic perspective view of a flavor suction device according to the third embodiment. FIG. 10: is sectional drawing along the axial direction of the flavor suction tool which concerns on 3rd Embodiment.

Next, an embodiment of the present invention will be described. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones.

Therefore, specific dimensions should be determined in consideration of the following explanation. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

[First Embodiment]
(1-1) Overall Schematic Configuration of Flavor Suction Tool FIG. 1 is an overall schematic configuration diagram of a flavor suction tool 10 according to the first embodiment. FIG. 2 is a cross-sectional view along the axial direction of the flavor suction tool 10.

As shown in FIGS. 1 and 2, the flavor suction device 10 has an elongated cylindrical shape, and includes a carbon heat source 20, a holder 30, and a flavor generation source 40. The flavor suction tool 10 heats the flavor generating source 40 with heat generated from the carbon heat source 20 in order to suppress the generation of aerosol.

The carbon heat source 20 is provided at the end 30e (one end) in the axis AX direction of the holder 30. The carbon heat source 20 is held by the end 30 e of the holder 30. The carbon heat source 20 includes a first portion 21 and a second portion 22. Specifically, the first portion 21 is held by the end 30 e of the holder 30.

That is, the first portion 21 is a portion that is held by the holder 30 and at least a portion of the first portion 21 protrudes from the holder 30 in the direction of the axis AX. Further, the second portion 22 is a portion including an end portion on the opposite side to the flavor generation source 40. In the first embodiment, the second portion 22 is a portion that is adjacent to the first portion 21 and protrudes from the holder 30.

Among the first portion 21 and the second portion 22, at least the first portion 21 includes a fire spread inhibitor that prevents the carbon heat source 20 from spreading. This prevents the holder 30 from spreading due to the heat generated by the carbon heat source 20. A more specific configuration of the carbon heat source 20 will be described later.

The holder 30 has a cylindrical shape containing the flavor generation source 40. For example, the holder 30 can be configured by a paper tube formed as a hollow cylindrical body by curving a rectangular cardboard into a cylindrical shape and aligning both side edges. In addition, in the holder 30, it arrange | positions so that the carbon heat source 20 and the flavor generation source 40 may not adjoin by arrange | positioning a space | gap part or a nonflammable member which has air permeability between the carbon heat source 20 and the flavor generation source 40. May be.

The flavor generating source 40 generates flavor by being heated by the carbon heat source 20. As the flavor generating source 40, for example, tobacco leaf can be used. Tobacco raw materials such as general cigarettes used for cigarettes (cigarettes), granular tobacco used for snuff tobacco, roll tobacco, and molded tobacco are used. Can be adopted. Roll tobacco is obtained by forming sheet-like recycled tobacco into a roll shape, and has a flow path inside. In addition, molded tobacco is obtained by molding granular tobacco. Further, a flavor component such as menthol may be supported on a porous or non-porous support.

(1-2) Configuration of Carbon Heat Source Next, the configuration of the carbon heat source 20 will be specifically described. As described above, the carbon heat source 20 is adjacent to the holder 30 in the direction of the axis AX, and is adjacent to the first portion 21 that is provided so as to protrude at least partially from the holder 30, and And a second portion 22 provided so as to protrude from the holder 30. In the first embodiment, the first portion 21 and the second portion 22 are integrally formed.

The carbon heat source 20 is obtained by molding a mixture containing a plant-derived carbonaceous material, an incombustible additive, an organic or inorganic binder and water by a method such as extrusion.

The total length of the carbon heat source 20 is preferably in the range of 10 mm to 30 mm, and preferably in the range of 13 mm to 20 mm. The outer diameter of the carbon heat source 20 is preferably in the range of 4 mm to 8 mm, and preferably in the range of 5 mm to 7 mm. Thereby, it can be used suitably as a heat source of the flavor suction tool 10.

The length of the carbon heat source 20 protruding from the holder 30 is preferably 8 mm to 15 mm. Further, the length of the first portion 21 can be, for example, in the range of 1 mm to 5 mm, preferably in the range of 1.5 to 3 mm, in the portion protruding from the holder 30. The portion of the first portion 21 held by the holder 30 can be in the range of 3 mm to 10 mm, for example. With such a configuration, the carbon heat source 20 can be extinguished autonomously without excessive heat being supplied to the holder 30, and the carbon heat source 20 can be prevented from falling off the holder 30.

Further, the length of the second portion 22 can be set in the range of 8 mm to 10 mm, for example. With such a configuration, when the flavor suction tool 10 is used, the user can suck the flavor a sufficient number of times.

As described above, the first portion 21 includes a fire spread inhibitor that prevents the carbon heat source 20 from spreading. That is, by including the fire spreader in the connection portion of the carbon heat source 20 with the holder 30, even if the user does not consciously extinguish the carbon heat source 20, the containing part containing the fire spreader is autonomous. Since the combustion is stopped, the spread of fire to the holder 30 or the like can be prevented. Here, it is preferable to expose at least a part of the first portion 21 including the fire spread inhibitor from the connection portion of the carbon heat source 20 with the holder 30 from the viewpoint of preventing excessive heat supply to the holder 30 and the like.

(1-3) Characteristics of the fire spread inhibitor Next, the characteristics of the fire spread inhibitor contained in the first portion 21 of the carbon heat source 20 will be described. It is preferable that the fire spread inhibitor contained in the first portion 21 is nonflammable at the combustion temperature of the carbon heat source 20 and causes an endothermic reaction below the combustion temperature of the carbon heat source 20. Further, when thermal decomposition occurs as an endothermic reaction, it is preferable that at least one of the thermal decomposition products is nonflammable and non-volatile at the combustion temperature of the carbon heat source 20.

That is, as the fire spread inhibitor, an inorganic substance that satisfies the following conditions can be used.
-Non-flammable at the combustion temperature of the carbon heat source (800 ° C-1200 ° C)-An endothermic reaction caused by melting or pyrolysis occurs below the combustion temperature-If thermal decomposition occurs, at least one pyrolysis product is Non-flammable and non-volatile at the combustion temperature.

In addition, the inorganic substance can be added to the carbon heat source by a method such as a solution, suspension, paste, or granular material. As the inorganic substance, for example, a soluble or hardly soluble alkali metal salt that satisfies the above-mentioned conditions, or a soluble or hardly soluble alkaline earth metal salt can be preferably used. Specifically, a soluble inorganic salt or a hardly soluble inorganic salt can be used as a fire spread inhibitor. Soluble inorganic salts include chlorides, carbonates or sulfates. Examples of the hardly soluble inorganic salt include hydroxide, carbonate or sulfate.

More specifically, for example, chlorides such as sodium chloride, calcium chloride, magnesium chloride and potassium chloride, carbonates such as sodium carbonate and sodium bicarbonate, or sulfates such as sodium sulfate and magnesium sulfate and hydration thereof. Particularly preferred are materials. Further, hydroxides such as magnesium hydroxide and calcium hydroxide, carbonates such as calcium carbonate and magnesium carbonate, sulfates such as calcium sulfate and hydrates thereof are particularly preferable.

Summarizing the conditions as described above, inorganic salts as shown in Table 1 can be used as a fire spread inhibitor.

Also, as a fire spread inhibitor, for example, a substance such as liquid glass can be used. Such liquid glass can be obtained as a liquid coating agent at room temperature by the method disclosed in Japanese Patent No. 2538527, for example, and after adding the coating agent to the first portion 21 of the carbon heat source 20 by a method such as coating, By drying at room temperature to about 200 ° C., a film containing at least one of silicon or metal oxide can be formed.

(1-4) Method of adding fire spread inhibitor Next, a method of adding the fire spread inhibitor will be described. The first part 21 containing the fire spreader is added to a part of the carbon heat source 20 by a method such as dipping, spraying, spraying, wetting, or coating a solution, suspension, paste, or granular material of the fire spreader. Can be produced.

For example, one end of a carbon heat source 20 produced to a size suitable for the flavor suction device 10 is impregnated to a predetermined depth in a liquid in which a fire spreader is dissolved or dispersed, held for a certain time, and then dried. Thus, the first portion 21 can be provided over an arbitrary length. Further, the content of the fire spread inhibitor in the first portion 21 can be arbitrarily controlled by the solution concentration of the fire spread inhibitor and the impregnation time. Furthermore, when the carbon heat source 20 has an opening that communicates in the axis AX direction, such as a cylindrical shape, the impregnation position of the fire spread inhibitor is more accurately obtained by impregnating the solution with the fire spread inhibitor while venting the opening. Can be controlled.

In consideration of the relationship between the selected fire spread inhibitor and the characteristics (shape, composition, etc.) of the carbon heat source 20 to be processed, the content of the suitable fire spread inhibitor and the length of the processed portion in the first portion 21 are as follows. A value that provides a sufficient fire spread prevention effect is selected. Further, when the fire spread inhibitor is soluble, a higher fire spread preventing effect can be obtained by penetrating into the carbon heat source 20.

(1-5) Other Features of Carbon Heat Source Next, other features of the carbon heat source 20 will be described.

(1-5.1) Additional Function with Soluble Alkali Metal Salt or Alkaline Earth Metal Salt The second portion 22 of the carbon heat source 20 may further include at least one of the inorganic substances listed in Table 1. In this case, the content of the inorganic substance contained in the second portion 22 with respect to the carbon heat source 20 is preferably smaller than the content of the fire spreader contained in the first portion 21 with respect to the carbon heat source 20.

For example, by adding at least one of a soluble alkali metal salt or an alkaline earth metal salt to the second portion 22, the carbon heat source 20 is not burned at the time of combustion due to an impact such as hitting an ashtray. Therefore, it is possible to prevent the carbon heat source 20 including the combustion part from dropping off (fire type dropping). Such an effect is particularly remarkable when an organic binder having a low thermal decomposition temperature is adopted as the binder of the carbon heat source 20.

The content of the soluble alkali metal salt or alkaline earth metal salt contained in the first portion 21 is preferably smaller than the content of the fire spreader contained in the second portion 22. Furthermore, a portion other than the first portion 21 of the carbon heat source 20 may contain a low-concentration soluble alkali metal salt.

As an inorganic substance that can realize such an additional function, the following conditions are preferably satisfied.
Incombustibility at the combustion temperature of the carbon heat source (800 ° C. to 1200 ° C.) At least one thermal decomposition product generated below the combustion temperature of the inorganic substance or the carbon heat source melts below the combustion temperature of the carbon heat source.

As the inorganic material satisfying such conditions, as described above, the soluble alkali metal salts and alkaline earth metal salts listed in Table 1 can be suitably used.

For example, a low-concentration soluble alkali metal salt can be added in the form of a solid or liquid when a carbonaceous material or a binder is mixed during molding such as extrusion. The soluble alkali metal salt concentration of the second portion 22 excluding the first portion 21 is selected to be a value that provides a sufficient effect within a range that does not impair ignitability and other combustion characteristics. When selected, the concentration is preferably 5 wt% or less, and more preferably 0.5 wt% or less.

(1-5.2) Carbonaceous material It is desirable to use a carbonaceous material from which volatile impurities have been removed by heat treatment or the like, but is not limited thereto. The carbonaceous material can be included in the range of 10 wt% to 99 wt%, preferably 30 wt% to 70 wt%, and 40 wt% to 50 wt% to provide sufficient heat supply and combustion for preventing ash scattering, etc. Desirable from the viewpoint of characteristics.

(1-5.3) Binder As the binder, organic binders such as sodium carboxymethyl cellulose (CMC) and ammonium alginate, minerals such as purified bentonite, or silica binders such as colloidal silica, water glass and calcium silicate are used. Binders known to those skilled in the art, such as inorganic binders, can be used.

In addition, it is desirable from the viewpoint of flavor to use an organic binder, particularly CMC. Further, when the carbon heat source 20 includes the soluble alkali metal salt or the soluble alkaline earth metal salt listed in Table 1 and CMC is used as a binder, the degree of etherification of CMC is set to 0.3 or more. With such a configuration, the carbon heat source 20 can be given strength that can withstand manufacturing and use. When CMC having a low degree of etherification is used, the strength after molding and drying is poor, and the suitability for production and use may be significantly deteriorated. Further, for example, by using CMC having a degree of etherification of less than 0.8, it becomes possible to easily mold at the time of molding such as extrusion.

Specifically, CMC can be contained in an amount of 1 to 10 wt%, and more preferably 1 wt% to 8 wt% from the viewpoint of flavor.

(1-5.4) Nonflammable Additive As the nonflammable additive, for example, a carbonate or oxide composed of sodium, potassium, calcium, magnesium, silicon, etc. can be used, and it can be contained in 40 to 89 wt%. In particular, it is preferable to contain 40 wt% to 55 wt% of calcium carbonate in the carbon heat source 20.

(1-6) Example Next, an example of the carbon heat source 20 constituting the flavor suction tool 10 will be described.

(1-6.1) Fire spread inhibitor (1-6.1.1) Composition and production method of carbon heat source A carbon heat source 20 having the composition shown in Table 2 was produced by the following method.
-86 g of activated carbon and 117 g of calcium carbonate (CaCO ₃ ) are mixed with 10.8 g of CMC having a degree of etherification of 0.6, and 250 g of water containing 2.2 g of sodium chloride is further mixed. Extrusion molding so as to form a cylindrical shape of 6 mm and an inner diameter of 4 mm. After the molding is dried, it is cut into a length of 13 mm to obtain the carbon heat source 20.

(1-6.1.2) Test Sample The carbon heat source produced by the above-described method was impregnated with an aqueous NaCl solution to produce test heat sources A to F shown in Table 3.

The test heat sources A to F were impregnated with NaCl by the following method.
・ Insert a 13 mm heat source into a tube with an inner diameter of 5 mm, and immerse each sample in a NaCl aqueous solution having a concentration shown in Table 3 for 210 seconds while flowing air at 1000 ml / min. Dry at 6 ° C. for 6 hours to obtain a NaCl impregnation heat source

Further, the NaCl content in the carbon heat source in the impregnated portion was calculated by the following equation.
1 mm equivalent NaCl content =
(Heat source dry weight after impregnation-dry weight of unimpregnated heat source) / length of NaCl impregnated part in heat source

(1-6.1.3) Evaluation method of fire spread prevention function Simulated smoking evaluation was performed by the following method.
-Insert a heat source 3 mm into a 6 mm inner diameter paper tube and set it in a Borgwald smoker.-Heat the heat source with an electric lighter for 8 seconds, then suck and ignite each sample with the capacity shown in Table 3-The above capacity Repeat the suction operation at 30 second intervals ・ Visually check whether or not the fire spread is prevented at the NaCl impregnation site

(1-6.1.4) Evaluation results Table 4 shows the results of the evaluations described above.

As shown in Table 4, the weight ratio of NaCl and combustible material (sum of carbonaceous material and organic binder) is 0.35 or more, or the weight ratio of NaCl and carbonaceous material is 0.40 or more in the impregnation part of the fire spreader. By doing so, combustion is stopped autonomously in the part containing the fire spread inhibitor, and a sufficient fire spread prevention function is obtained.

(1-6.2) Verification of effects of CaCO ₃ , Mg (OH) ₂ and liquid glass (1-6.2.1) Test sample To verify the effects of CaCO ₃ , Mg (OH) ₂ and liquid glass A test sample of the carbon heat source 20 having the composition shown in Table 5 and having the shape shown in FIG. 3 was produced by extrusion molding.

In addition, a predetermined amount of suspension of CaCO ₃ or Mg (OH) ₂ or two types of liquid glass (Terios Coat NP-360G and 360KT, manufactured by Nikko Co., Ltd.) so that the length of the containing part is 20 mm. Then, it was applied to the outer peripheral portion of the carbon heat source 20 and dropped onto the opening portion to prepare test heat sources G to J shown in Table 6.

The content of the fire spread inhibitor in the carbon heat source 20 in the impregnated portion of the suspension or liquid glass of CaCO ₃ or Mg (OH) ₂ was calculated by the following equation.
・ 1mm present fire spreader content = addition amount of fire spread inhibitor / length of impregnated part in heat source

(1-6.2.2) Evaluation method of fire spread prevention function Simulated smoking evaluation was performed by the following method.
-Insert a heat source 3 mm into a 6 mm inner diameter paper tube and set it in a Borgwald smoker.-Heat the heat source with an electric lighter for 8 seconds, and then suck and ignite each sample at 55 ml / 2 sec. Repeat the operation at intervals of 15 seconds. When combustion is stopped in the part containing the flame spread inhibitor, the length from the boundary between the containing part and the non-containing part to the combustion stop position is measured (see FIG. 4).

(1-6.2.3) Evaluation results Table 7 shows the results of the evaluations described above.

As shown in Table 7, any of the fire spread inhibitors (CaCO ₃ , Mg (OH) ₂ , liquid glass) used in this test contains a predetermined amount in the carbon heat source 20, so that the content of the fire spread inhibitor is included. It was confirmed that combustion can be stopped autonomously at

Further, from the evaluation results in Table 7, the following can be further inferred.
・ The amount of addition required to stop combustion differs depending on the type of fire spread inhibitor used. For example, Mg (OH) ₂ is considered to have a higher combustion stop effect than CaCO ₃ . It is presumed that Mg (OH) ₂ has a larger endothermic amount in pyrolysis.
・ The effect of preventing fire spread differs depending on the ratio of the amount added to the inside of the hole and the outer periphery.

It should be noted that, although the same level of effect as the other samples cannot be obtained for the samples (for example, Samples G--3 and H-5) determined as “x: burning duration” in Table 1, the certain effects are It should be noted that it was obtained.

(1-6.3) Verification of fire-disappearance prevention effect by containing a low concentration of soluble alkali metal salt (1-6.3.1) Test sample A test sample of a carbon heat source 20 (total length 15 mm, outer diameter 6 mm) having the composition shown in Table 8 was produced by extrusion molding.

(1-6.3.2) Evaluation method of fire drop-off prevention function Simulated smoking evaluation was performed by the following method.
-Insert the produced carbon heat source 20 into a paper tube with an outer diameter of 6 mm 3 mm and use it as an evaluation sample.-Ignite the carbon heat source 20 and remove the cigarette ash at any timing during combustion. Hit the metal ashtray-If the carbon heat source 20 breaks in the non-combustion part at the time of hitting, it is determined that the fire type has dropped.

(1-6.3.3) Evaluation Results The evaluation results for each sample were as follows.
K: A fire drop occurred.
L: No drop of fire occurred.
M: No drop of fire occurred.
N: No drop of fire occurred. Visible smoke was produced during use.
O: No drop of fire occurred. Visible smoke was produced during use.

From the above results, it was confirmed that it was possible to prevent a fire drop from occurring by adding a low concentration of NaCl to the entire carbon heat source 20.

In addition, in the test conditions mentioned above, it has confirmed that it had sufficient fire-type fall-off prevention effect by making NaCl content rate in the carbon heat source 20 into 0.5 wt% or more. On the other hand, when the NaCl content was 3 wt% or more, visible smoke was generated during use. Therefore, when the carbon heat source 20 used in this test was adopted as the heat source of the smokeless flavor inhaler, the NaCl content was It is desirable to make it less than 3 wt%.

(1-7) Actions / Effects As described above, according to the flavor suction tool 10 and the carbon heat source 20, the first portion 21 protruding from the holder 30 has a fire spread inhibitor that prevents the carbon heat source 20 from spreading. included. For this reason, it is possible to prevent the combustion of the carbon heat source 20 from proceeding to the contact portion with the holder 30 containing the flavor generating source 40.

Further, as described above, excessive heat supply to the holder 30 can be prevented without providing another member other than the carbon heat source 20, and combustion or thermal decomposition of the holder 30 can be prevented. That is, since supply of excessive heat to the holder 30 is prevented, it is not necessary to give the holder 30 special heat resistance, and even a material such as a paper tube can be suitably used as the holder 30 and the manufacturing cost is increased. Can be suppressed.

(1-8) Other Embodiments As described above, the contents of the present invention have been disclosed through the first embodiment. However, it is understood that the description and drawings constituting a part of this disclosure limit the present invention. should not do. From this disclosure, various alternative embodiments will be apparent to those skilled in the art.

For example, the shapes of the first portion 21 and the second portion 22 of the carbon heat source 20 may be changed as follows. 5A to 5C are cross-sectional views along the axial direction of the carbon heat source according to the modified example of the present invention.

As shown in FIG. 5A, the fire spread inhibitor (dot portion in the figure) may be disposed on the outer peripheral portion of the first portion 21. Further, as shown in FIG. 5B, the first portion 21 spreads as it approaches the flavor generating source 40 (not shown in FIG. 5B) in the cross section along the axial direction of the holder 30. You may comprise so that the area | region containing an inhibitor (dot part in a figure) may become large. In FIG. 5B, the portion of the first portion 21 that does not contain the fire spread inhibitor is substantially triangular, but the portion does not necessarily have a triangular shape, and may be a pyramid shape, for example.

Further, as shown in FIG. 5C, both the first portion 21 and the second portion 22 are provided with a fire spread inhibitor as they approach the flavor generating source 40 in the cross section along the axial direction of the holder 30. You may comprise so that the area | region to include may become large.

In the above-described embodiment, the example in which the fire spreader is included in the entire axis AX of the first portion 21 has been described. However, it is sufficient that at least part of the first portion 21 includes the fire spread inhibitor. For example, the fire spreader may be included only in the first portion 21 that is not held by the holder 30.

In the first embodiment, an example in which the flame spreader containing region is variously changed in the carbon heat source 20 has been shown, but the substance may be contained at different concentrations in the axial direction of the carbon heat source 20. An example of the configuration described in (1-5.1) is that the second portion 22 contains a low concentration of soluble alkali metal salt or soluble alkaline earth metal salt. Further, for example, the concentration gradient can be realized such that the concentration of the substance is thin on the ignition end side of the carbon heat source 20 and the holder 30 side is thick. Thereby, the amount of heat generated by the carbon heat source 20 can be controlled more precisely.

Further, the preferable content (concentration) of the fire spread inhibitor varies depending on the shape and composition (calorific value) of the carbon heat source 20 as well as the type of the fire spread inhibitor, but it depends on the method shown in (1-4). In order to achieve the effect of preventing the spread of fire, the fire spread inhibitor can be set to an arbitrary content.

In the first embodiment, the outer shape of the carbon heat source 20 is a cylindrical shape. However, the present invention is not limited to the cylindrical shape, and various shapes such as a rectangular parallelepiped are naturally included in the present invention.

[Second Embodiment]
(2-1) Overall Schematic Configuration of Flavor Suction Tool FIG. 6 is an overall schematic configuration diagram of the flavor suction tool 10 according to the second embodiment. FIG. 7 is a cross-sectional view of the flavor suction tool 10 along the axial direction.

As shown in FIG. 6 and FIG. 7, the flavor inhaler 10 has an elongated cylindrical shape as in the first embodiment, and includes a carbon heat source 20, a holder 30, and a flavor generation source 40. The flavor suction tool 10 heats the flavor generating source 40 with heat generated from the carbon heat source 20 in order to suppress the generation of aerosol.

(2-2) Configuration of Carbon Heat Source Next, the configuration of the carbon heat source 20 will be specifically described. Similarly to the first embodiment, the carbon heat source 20 is adjacent to the holder 30 in the axis AX direction, and is adjacent to the first portion 21 and the first portion 21 provided so as to protrude at least partially from the holder 30. And a second portion 22 provided so as to protrude from the holder 30. In the second embodiment, the first portion 21 and the second portion 22 are integrally formed.

In the second embodiment, the second portion 22 can also contain a low concentration of NaCl (an example of a fire spread inhibitor). That is, the content rate of NaCl in the second part 22 with respect to the carbon heat source 20 is smaller than the content rate of NaCl in the first part 21 with respect to the carbon heat source 20. Thus, the carbon heat source 20 can be produced even if the holder 30 is spread by the heat generated by the carbon heat source 20 without impeding the ignitability of the carbon heat source 20 and the flavor suction tool 10 is hit against an ashtray with a certain level of force. Can prevent the burning part (fire type) from falling. Such an effect is particularly remarkable when an organic binder having a low thermal decomposition temperature is adopted as the binder of the carbon heat source 20.

(2-3) Method for Adding Sodium Chloride Next, a method for adding sodium chloride (NaCl) will be described. The first portion 21 containing high-concentration NaCl is added to a part of the carbon heat source 20 by immersing, spraying, spraying, wetting, coating, or the like a solution, suspension, paste, or powder of NaCl. Can be produced.

For example, by impregnating one end of the carbon heat source 20 produced in a size suitable for the flavor suction tool 10 to a predetermined depth in a liquid in which NaCl is dissolved or dispersed, holding it for a certain time, and then drying, The first portion 21 can be provided over any length. The NaCl content in the first portion 21 can be arbitrarily controlled by the NaCl solution concentration and the impregnation time. Further, when the carbon heat source 20 has an opening communicating in the direction of the axis AX like a cylindrical shape, the NaCl impregnation position can be controlled with higher accuracy by impregnating with the NaCl solution while venting the opening.

A suitable NaCl content in the first portion 21 and the length of the processed portion are values that can obtain a sufficient fire spread prevention effect in consideration of the relationship with the characteristics (shape, composition, etc.) of the carbon heat source 20 to be processed. Is selected. Further, by infiltrating NaCl into the carbon heat source 20, a higher fire spread prevention effect can be obtained.

(2-4) Fire Type Drop Prevention Function by Sodium Chloride As described above, the carbon heat source 20 can be provided with a fire type (carbon heat source 20) fall prevention function by low concentration sodium chloride (NaCl). Such low-concentration NaCl can be added in the form of a solid or liquid when, for example, a carbonaceous material or a binder is mixed during molding such as extrusion. The NaCl concentration of the second portion 22 excluding the first portion 21 is selected to be a value that provides a sufficient effect within a range that does not impair the ignitability and other combustion characteristics, but may be, for example, 1 wt% or less. Preferably, it is 0.5 wt% or less.

(2-5) Other Features of Carbon Heat Source Next, other features of the carbon heat source 20 will be described.

(2-5.1) Carbonaceous material It is desirable to use a carbonaceous material from which volatile impurities have been removed by heat treatment or the like, but is not limited thereto. The carbonaceous material can be included in the range of 10 wt% to 99 wt%, preferably 30 wt% to 70 wt%, and 40 wt% to 50 wt% to provide sufficient heat supply and combustion for preventing ash scattering, etc. Desirable from the viewpoint of characteristics.

Although it is desirable to use a carbonaceous material from which volatile impurities have been removed by heat treatment or the like, the carbonaceous material is not limited to this. The carbonaceous material can be included in the range of 10 wt% to 99 wt%, preferably 30 wt% to 70 wt%, and 40 wt% to 50 wt% to provide sufficient heat supply and combustion for preventing ash scattering, etc. Desirable from the viewpoint of characteristics.

(2-5.2) Binder As the binder, organic binders such as sodium carboxymethylcellulose (CMC) and ammonium alginate, minerals such as purified bentonite, or silica binders such as colloidal silica, water glass and calcium silicate are used. Binders known to those skilled in the art, such as inorganic binders, can be used.

In addition, it is desirable from the viewpoint of flavor to use an organic binder, particularly CMC. Moreover, when using CMC as a binder, the degree of etherification of CMC is set to 0.3 or more. With such a configuration, the carbon heat source 20 can be given strength that can withstand manufacturing and use. When CMC having a low degree of etherification is used, the strength after molding and drying is poor, and the suitability for production and use may be significantly deteriorated. Further, for example, by using CMC having a degree of etherification of less than 0.8, it becomes possible to easily mold at the time of molding such as extrusion.

(2-5.3) Nonflammable Additives As the nonflammable additives, for example, carbonates or oxides composed of sodium, potassium, calcium, magnesium, silicon and the like can be used, and they can be contained in 40 to 89 wt%. In particular, it is preferable to contain 40 wt% to 55 wt% of calcium carbonate in the carbon heat source 20.

(2-6) Example Next, an example of the carbon heat source 20 constituting the flavor suction tool 10 will be described.

(2-6.1) Verification of fire spread prevention effect by high concentration of sodium chloride (2-6.1.1) Composition and production method of carbon heat source Carbon heat source 20 having the composition shown in Table 9 is produced by the following method. did.
-86 g of activated carbon and 117 g of calcium carbonate (CaCO ₃ ) are mixed with 10.8 g of CMC having a degree of etherification of 0.6, and 250 g of water containing 2.2 g of sodium chloride is further mixed. Extrusion molding so as to form a cylindrical shape of 6 mm and an inner diameter of 4 mm. After the molding is dried, it is cut into a length of 13 mm to obtain the carbon heat source 20.

(2-6.1.2) Test Sample Test heat sources A to F shown in Table 10 were produced by impregnating the carbon heat source produced by the above-described method with an aqueous NaCl solution.

The test heat sources A to F were impregnated with NaCl by the following method.
Insert a 10 mm heat source into a tube with an inner diameter of 5 mm and immerse each sample in a NaCl aqueous solution having the concentration shown in Table 11 for 210 seconds while flowing air at 1000 ml / min. Dry at 6 ° C. for 6 hours to obtain a NaCl impregnation heat source

(2-6.1.3) Evaluation method of fire spread prevention function Simulated smoking evaluation was performed by the following method.
-Insert a heat source 3 mm into a 6 mm inner diameter paper tube and set it in a Borgwald smoker.-Heat the heat source with an electric lighter for 8 seconds, and then suck and ignite each sample at the capacity shown in Table 11-The above capacity Repeat the suction operation at 30 second intervals ・ Visually check whether or not the fire spread is prevented at the NaCl impregnation site

(2-6.1.4) Evaluation results Table 11 shows the evaluation results described above.

As shown in Table 11, in this example, in the high-concentration NaCl impregnated portion, the weight ratio of NaCl to combustible material (sum of carbonaceous material and organic binder) is 0.35 or more, or NaCl to carbonaceous material. By setting the weight ratio to 0.40 or more, combustion is stopped autonomously in the portion containing the fire spread inhibitor, and a sufficient fire spread prevention function is obtained.

(2-6.2) Verification of fire drop-off prevention effect by low-concentration sodium chloride (2-6.2.1) Test sample A test sample of a carbon heat source 20 (total length: 15 mm, outer diameter: 6 mm) having the composition shown in FIG.

(2-6.2.2) Evaluation method of fire type omission prevention function Simulated smoking evaluation was performed by the following method.
-Insert the produced carbon heat source 20 into a paper tube with an outer diameter of 6 mm 3 mm and use it as an evaluation sample.-Ignite the carbon heat source 20 and remove the cigarette ash at any timing during combustion. Hit the metal ashtray-If the carbon heat source 20 breaks in the non-combustion part at the time of hitting, it is determined that the fire type has dropped.

(2-6.2.3) Evaluation results The evaluation results of each sample were as follows.
G: A fire drop occurred.
H: No drop of fire occurred.
I: No fire omission occurred.
J: No drop of fire occurred. Visible smoke was produced during use.
K: No fire omission occurred. Visible smoke was produced during use.

(2-7) Action / Effect As described above, the carbon heat source 20 contains at least a portion of NaCl, and the content of NaCl in the first portion 21 with respect to the carbon heat source 20 is the same as the carbon of NaCl in the second portion 22. It is larger than the content rate with respect to the heat source 20. For this reason, it is possible to prevent the combustion of the carbon heat source 20 from proceeding to the contact portion with the holder 30 containing the flavor generating source 40 due to the effect of preventing the spread of NaCl in the first portion 21. Further, according to the second embodiment, it is possible to realize a concentration gradient such that the concentration of the substance is low on the ignition end side of the carbon heat source 20 and the holder 30 side is high. Thereby, the amount of heat generated by the carbon heat source 20 can be controlled more precisely.

Furthermore, NaCl is effective in preventing the carbon heat source 20 from falling off. Moreover, it is not necessary to provide another member other than the carbon heat source 20 as described above, and an increase in manufacturing cost can be suppressed.

Furthermore, it is preferable that the weight ratio of NaCl and combustible in the first part is 0.35 or more, and the weight ratio of NaCl and carbonaceous material in the first part is 0.40 or more. In this case, a further sufficient fire spread preventing effect can be obtained.

(2-8) Other Embodiments As described above, the contents of the present invention have been disclosed through the second embodiment. However, it is understood that the description and drawings constituting a part of this disclosure limit the present invention. should not do. From this disclosure, various alternative embodiments will be apparent to those skilled in the art.

For example, the shapes of the first portion 21 and the second portion 22 of the carbon heat source 20 may be changed as follows. FIGS. 8A to 8C are cross-sectional views along the axial direction of the carbon heat source according to the modified example of the present invention.

As shown in FIG. 8A, NaCl (dot portion in the figure) may be arranged on the outer peripheral portion of the first portion 21. Further, as shown in FIG. 8B, the first portion 21 is NaCl in the cross section along the axial direction of the holder 30 as it approaches the flavor generating source 40 (not shown in FIG. 8B). The region including (dot portion in the figure) may be widened. In FIG. 8B, the portion of the first portion 21 that does not contain NaCl has a substantially triangular shape, but the portion does not necessarily have a triangular shape, and may have a pyramid shape, for example.

Furthermore, as shown in FIG. 8C, both the first portion 21 and the second portion 22 are regions containing NaCl as they approach the flavor generating source 40 in the cross section along the axial direction of the holder 30. May be configured to be wide.

In the above-described embodiment, the example in which NaCl is included in the entire axis AX of the first portion 21 has been described. However, it is sufficient that at least a portion of the first portion 21 includes NaCl. Only the first portion 21 that is not held by may be made to contain NaCl.

In the second embodiment, an example in which the NaCl-containing region is variously changed in the carbon heat source 20 has been shown, but NaCl may be contained in different concentrations in the axial direction of the carbon heat source 20. The configuration described in (2-2) including low concentration NaCl in the second portion 22 is an example. Further, for example, the concentration gradient can be realized so that the NaCl concentration is low on the ignition end side of the carbon heat source 20 and the holder 30 side is high. Thereby, the amount of heat generated by the carbon heat source 20 can be controlled more precisely.

Further, the preferred NaCl content (concentration) varies depending on the shape and composition (calorific value) of the carbon heat source 20, but by the method shown in (2-3) or (2-4), the effect of preventing the spread of fire or NaCl can be set to an arbitrary content so that the effect of preventing the drop of fire can be achieved.

In the second embodiment, the outer shape of the carbon heat source 20 is cylindrical. However, the present invention is not limited to the cylindrical shape, and various shapes such as a rectangular parallelepiped are also included in the present invention.

[Third Embodiment]
(3-1) Overall Schematic Configuration of Flavor Suction Tool FIG. 9 is an overall schematic configuration diagram of the flavor suction tool 10 according to the third embodiment. FIG. 10 is a cross-sectional view along the axial direction of the flavor suction tool 10.

As shown in FIG. 9 and FIG. 10, the flavor suction tool 10 has an elongated cylindrical shape as in the first embodiment, and includes a carbon heat source 20, a holder 30, and a flavor generation source 40. The flavor suction tool 10 heats the flavor generating source 40 with the heat generated from the carbon heat source 20 without burning or pyrolyzing the flavor generating source 40.

The carbon heat source 20 is provided at the end 30e (one end) in the axis AX direction of the holder 30. The carbon heat source 20 is held by the end 30 e of the holder 30. The carbon heat source 20 has a protruding portion 23 at least partially protruding from the holder 30.

The length of the protruding portion 23 can be 8 mm to 15 mm, for example. With such a configuration, the user can easily visually recognize the combustion state of the carbon heat source 20 during use. A more specific configuration of the carbon heat source 20 will be described later.

(3-2) Configuration of Carbon Heat Source Next, the configuration of the carbon heat source 20 will be specifically described. The carbon heat source 20 is obtained by molding a mixture containing a plant-derived carbonaceous material, an incombustible additive, an organic binder and water by a method such as extrusion.

The carbon heat source 20 includes a carbonaceous material, an organic binder, and a reinforcing agent. As the organic binder, it is particularly preferable to use sodium carboxymethylcellulose (CMC) from the viewpoint of flavor. When other organic binders, for example, ammonium alginate, are used, there is a possibility that the thermal decomposition product generated with combustion of the carbon heat source 20 may inhibit the flavor. The degree of etherification of CMC is set to 0.3 or more. The degree of etherification is preferably less than 0.8.

The reinforcing agent is nonflammable at the combustion temperature of the carbon heat source 20, and at least one thermal decomposition product generated below the combustion temperature of the carbon heat source 20 is melted below the combustion temperature of the carbon heat source 20. Have Specifically, the reinforcing agent is nonflammable at 800 ° C. to 1200 ° C., which is the combustion temperature of the carbon heat source 20, and at least one pyrolyzate generated below the combustion temperature of the carbon heat source 20 is carbon dioxide. It has a characteristic of melting at a temperature lower than the combustion temperature of the heat source 20.

The reinforcing agent is preferably made of at least one of a soluble alkali metal salt or a soluble alkaline earth metal salt that satisfies the above-mentioned conditions. Examples of the soluble alkali metal salt or the soluble alkaline earth metal salt include chlorides, carbonates, and sulfates.

More specifically, sodium chloride, calcium chloride, magnesium chloride, potassium chloride, sodium carbonate, sodium hydrogen carbonate, sodium sulfate, magnesium sulfate can be mentioned, and sodium chloride (NaCl) can be preferably used. In addition, when using NaCl, it is preferable that the content rate of NaCl is 5 wt% or less with respect to the weight of the carbon heat source 20.

As described above, when the carbon heat source 20 contains the low-concentration reinforcing agent, the carbon heat source 20 breaks from the non-combustion portion due to an impact such as a hit to the ashtray during the combustion of the carbon heat source 20, and includes the combustion portion. It is possible to prevent a part of the carbon heat source 20 from dropping (fire type dropping).

The value of the reinforcing agent concentration of the carbon heat source 20 is selected so as to obtain a sufficient effect within a range that does not impair ignitability and other combustion characteristics. For example, when using NaCl, specifically, it is sufficient that NaCl is contained in the carbon heat source 20 to some extent. More specifically, the mass percent concentration (NaCl concentration) of NaCl with respect to the carbon heat source 20 is 5 wt% or less, and can be employed without impairing the ignitability. Moreover, in order to reduce generation | occurrence | production of the visible smoke accompanying the combustion of the carbon heat source 20, it is preferable that it is less than 3 wt%, It is preferable that it is 1 wt% or less suitably, It is 0.5 wt% or less Is more preferable. For example, NaCl can be added as a granule or a solution when mixing a carbonaceous material, a binder, or the like during molding such as extrusion.

As described above, when CMC is used as a binder, the degree of etherification of CMC is set to 0.3 or more. By doing in this way, even when the carbon heat source 20 contains a reinforcing agent, the carbon heat source 20 can be provided with strength that can withstand manufacturing and use.

When CMC having a low degree of etherification is used, the strength after molding and drying is poor, and the suitability for production and use may be significantly deteriorated. Further, for example, by using CMC having a degree of etherification of less than 0.8, it becomes possible to easily mold at the time of molding such as extrusion.

(3-3) Other Features of Carbon Heat Source Next, other features of the carbon heat source 20 will be described.

(3-3.1) The fire spread prevention function The carbon heat source 20 may have different reinforcing agent concentrations in the direction of the axis AX. For example, the content of the reinforcing agent with respect to the carbon heat source 20 on the other end 20b side of the carbon heat source 20 may be larger than the content of the reinforcing agent on the one end 20a side of the carbon heat source 20, more specifically. In addition, a part of the carbon heat source 20, specifically, near the other end 20 b, contains a soluble alkali metal salt or alkaline earth metal salt having a higher concentration than the portion including the one end 20 a (protruding portion). Also good. In the portion containing the high-concentration soluble alkali metal salt or alkaline earth metal salt (second portion), the combustion of the carbon heat source 20 is stopped autonomously in the containing portion, and the carbon heat source 20 is transferred to the holder. Fire spread can be prevented more reliably.

Specifically, the holder 30 is exposed by exposing at least a part of the portion (second portion) of the carbon heat source 20 containing the high-concentration soluble alkali metal salt or alkaline earth metal salt as described above. The combustion of the carbon heat source 20 can be stopped before excessive heat is supplied to 30 or the like. The length of the portion of the carbon heat source 20 containing a high concentration of soluble alkali metal salt or alkaline earth metal salt to be exposed from the holder 30 is 1 mm to 5 mm, more preferably 1.5 mm to 3 mm.

The soluble alkali metal salt or alkaline earth metal salt concentration to be contained on the other end portion 20b side of the carbon heat source 20 is sufficiently spread from the relationship with the carbonaceous material blending ratio in the carbon heat source 20 and the air flow path structure. A numerical value that achieves the prevention function is appropriately selected. For example, when NaCl is used, NaCl is added so that the weight ratio of NaCl to combustible material (sum of carbonaceous material and organic binder) is 0.35 or more, or the weight ratio of NaCl to carbonaceous material is 0.40 or more. By exposing the exposed portion from the holder 30 by about 2 mm to 3 mm, a sufficient fire spread prevention function can be obtained.

The portion of the carbon heat source 20 containing a high concentration of soluble alkali metal salt or alkaline earth metal salt is obtained by, for example, replacing one end portion of the carbon heat source 20 having a size suitable for the flavor suction tool 10 with a soluble alkali. It can be formed by impregnating an aqueous solution containing a metal salt or an alkaline earth metal salt to a predetermined depth, holding it for a certain time, and then drying. The content of the soluble alkali metal salt or alkaline earth metal salt in the other end portion 20b of the carbon heat source 20 can be arbitrarily controlled by the concentration of the soluble alkali metal salt or alkaline earth metal salt solution and the impregnation time. For example, when NaCl is used, the concentration of the NaCl aqueous solution used for impregnation is preferably 15 wt% to 26 wt%.

In addition, when the carbon heat source 20 has an opening that communicates in the axis AX direction like a cylindrical shape, a soluble alkali metal salt or an alkaline earth metal salt is impregnated with an aqueous solution while passing through the opening. The impregnation position of the alkali metal salt or alkaline earth metal salt can be controlled more accurately.

(3-3.2) Carbonaceous material It is desirable to use a carbonaceous material from which volatile impurities have been removed by heat treatment or the like, but is not limited thereto. The carbonaceous material can be included in the range of 10 wt% to 99 wt%, preferably 30 wt% to 70 wt%, and 40 wt% to 50 wt% to provide sufficient heat supply and combustion for preventing ash scattering, etc. Desirable from the viewpoint of characteristics.

(3-3.3) Nonflammable Additives As the nonflammable additives, for example, carbonates or oxides composed of sodium, potassium, calcium, magnesium, silicon and the like can be used, and they can be contained in 40 to 89 wt%. In particular, it is preferable to contain 40 wt% to 55 wt% of calcium carbonate in the carbon heat source 20.

(3-3.4) Shape of carbon heat source The total length of the carbon heat source 20 is preferably in the range of 10 mm to 30 mm, and more preferably in the range of 13 mm to 20 mm. Further, the outer diameter of the carbon heat source 20 is preferably in the range of 4 mm to 8 mm, and more preferably in the range of 5 mm to 7 mm. Thereby, it can be used suitably as a heat source of the flavor suction tool 10.

(3-4) Example Next, an example of the carbon heat source 20 constituting the flavor suction tool 10 will be described.

(3-4.1) Test sample Test of carbon heat source 20 (total length: 15 mm, outer diameter: 6 mm) having the composition shown in Table 13 by extrusion molding in order to verify the effect of preventing fire omission by low-concentration sodium chloride (NaCl). A sample was made.

(3-4.2) Evaluation method of fire drop-off prevention function Simulated smoking evaluation was performed by the following method.
-Insert the produced carbon heat source 20 into a paper tube with an outer diameter of 6 mm 3 mm and use it as an evaluation sample.-Ignite the carbon heat source 20 and remove the cigarette ash at any timing during combustion. Hit the metal ashtray-If the carbon heat source 20 breaks in the non-combustion part at the time of hitting, it is determined that the fire type has dropped.

(3-4.3) Evaluation results The evaluation results of each sample were as follows.
A: A fire drop occurred.
B: No drop of fire occurred.
C: No fire omission occurred.
D: No drop of fire occurred. Visible smoke was produced during use.
E: No fire omission occurred. Visible smoke was produced during use.

(3-5) Action / Effect As described above, the carbon heat source 20 has the protruding portion 23 protruding from the holder 30. For this reason, the user can visually recognize the combustion state of the carbon heat source 20 easily. Moreover, the carbon heat source 20 contains a reinforcing agent and sodium carboxymethyl cellulose (CMC), and the degree of etherification of CMC is 0.3 or more. For this reason, even if the flavor suction tool 10 is struck against an ashtray or the like with a certain force or more while giving the carbon heat source 20 strength sufficient to withstand manufacture and use, the combustion part (fire type) can be prevented from falling.

As described above, the binder contained in the carbon heat source 20 is desirably CMC from the viewpoint of flavor, but in the production of a carbon heat source containing a reinforcing agent, when CMC having a degree of etherification of less than 0.3 is used, The strength after molding and drying is poor, and the suitability for production and use may be significantly deteriorated. That is, the inventor of the present application ensures the strength of the carbon heat source 20 that can withstand production and use by including NaCl and CMC in the carbon heat source 20 and setting the degree of etherification of CMC to 0.3 or more. In addition, they have acquired knowledge that fire omission can be effectively prevented.

Further, by setting the degree of etherification of CMC in the range of 0.3 to 0.8, it is possible to achieve both the guarantee of strength when the carbon heat source 20 is not burned and the ease of molding. Furthermore, in the direction of the axis AX of the flavor suction tool 10, the effect of preventing the spread of fire to the holder of the carbon heat source 20 is also achieved by imparting a concentration gradient to the reinforcing agent, particularly a soluble alkali metal salt or a soluble alkaline earth metal salt. Can do.

(3-6) Other Embodiments As described above, the contents of the present invention have been disclosed through the third embodiment. However, it is understood that the description and drawings constituting a part of this disclosure limit the present invention. should not do. From this disclosure, various alternative embodiments will be apparent to those skilled in the art.

For example, in 3rd Embodiment, it is good also as a reinforcing agent density | concentration different in the axis line AX direction of the carbon heat source 20, for example, in a part of carbon heat source 20, specifically, the other end part 20b side (2nd part). Although a higher concentration of reinforcing agent may be contained than the portion including the one end portion 20a (protruding portion), such a configuration is not essential for achieving the above-described effects of the present invention.

Thus, it goes without saying that the present invention includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

Japanese Patent Application No. 2012-104143 (filed on April 27, 2012), Japanese Patent Application No. 2012-104148 (filed on April 27, 2012), Japanese Patent Application No. 2012-106201 ( The entire contents of which was filed on May 7, 2012) are incorporated herein by reference.

According to the feature of the present invention, the supply of excessive heat to the holder is suppressed and the combustion or pyrolysis of the holder is prevented without providing another member other than the carbon heat source in the portion of the carbon heat source held by the holder. And a carbon heat source.

Claims

A flavor suction device comprising: a flavor generation source; a cylindrical holder containing the flavor generation source; and a carbon heat source provided at one end in the axial direction of the holder,
The carbon heat source is in the axial direction,
A first portion held by the holder and at least partially protruding from the holder;
A second portion including the end portion on the opposite side to the flavor generating source,
At least one part of the said 1st part is a flavor suction tool containing the fire spread prevention agent which prevents the fire spread of the said carbon heat source.
The fire spread inhibitor is
Non-flammable at the combustion temperature of the carbon heat source,
An endothermic reaction occurs below the combustion temperature of the carbon heat source,
The flavor inhaler according to claim 1, wherein when pyrolysis occurs as the endothermic reaction, at least one of the pyrolysis products is nonflammable and non-volatile at a combustion temperature of the carbon heat source.
The flavor inhaler according to claim 2, wherein the fire spread inhibitor is a soluble or hardly soluble alkali metal salt, or a soluble or hardly soluble alkaline earth metal salt.
The fire spreader is a soluble alkali metal salt or a soluble alkaline earth metal salt,
The flavor inhaler according to claim 3, wherein the soluble alkali metal salt or the soluble alkaline earth metal salt is any one of a chloride, a carbonate and a sulfate.
The fire spread inhibitor is a hardly soluble alkali metal salt or a hardly soluble alkaline earth metal salt,
The flavor inhaler according to claim 3, wherein the hardly soluble alkali metal salt or the hardly soluble alkaline earth metal salt is any one of a hydroxide, a carbonate and a sulfate.
The flavor inhaler according to claim 1, wherein the fire spread inhibitor includes liquid glass.
The second portion further includes at least one of the soluble alkali metal salt or the soluble alkaline earth metal salt,
The content rate of the soluble alkali metal salt or soluble alkaline earth metal salt contained in the second part with respect to the carbon heat source is smaller than the content rate of the fire spreader contained in the first part with respect to the carbon heat source. 3. The flavor suction tool according to 3.
As the fire spread inhibitor, sodium chloride is included,
The flavor suction tool according to claim 1, wherein a content ratio of the sodium chloride in the first portion with respect to the carbon heat source is larger than a content ratio of the sodium chloride with respect to the carbon heat source in the second portion.
The flavor inhaler according to claim 8, wherein a weight ratio of the sodium chloride and the combustible in the first part is 0.35 or more.
The flavor suction tool according to claim 8, wherein a weight ratio of the sodium chloride and the carbonaceous material in the first portion is 0.40 or more.
The flavor inhaler according to claim 8, wherein the second part contains sodium chloride, and the mass percent concentration of the sodium chloride in the second part is 1 wt% or less.
The length of the carbon heat source protruding from the holder along the axial direction is 8 mm or more and 15 mm or less,
The flavor suction tool according to claim 1, wherein the length of the first portion is 1 mm or more and 5 mm or less, preferably 1.5 mm or more and 3 mm or less in a portion protruding from the holder.
The flavor suction tool according to claim 1, wherein the first part and the second part are formed as a single unit.
A carbon heat source provided at one end in the axial direction of the cylindrical holder containing the flavor generation source,
A first portion that is held by the holder in the axial direction, and is provided so that at least a portion protrudes from the holder;
A second part provided to include the end on the opposite side to the flavor generating source,
At least a part of the first part is a carbon heat source including a fire spread inhibitor that prevents the carbon heat source from spreading.