WO2017203686A1 - 非燃焼型加熱喫煙物品用のたばこ充填物 - Google Patents
非燃焼型加熱喫煙物品用のたばこ充填物 Download PDFInfo
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- WO2017203686A1 WO2017203686A1 PCT/JP2016/065717 JP2016065717W WO2017203686A1 WO 2017203686 A1 WO2017203686 A1 WO 2017203686A1 JP 2016065717 W JP2016065717 W JP 2016065717W WO 2017203686 A1 WO2017203686 A1 WO 2017203686A1
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/10—Chemical features of tobacco products or tobacco substitutes
- A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/10—Chemical features of tobacco products or tobacco substitutes
- A24B15/16—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes
- A24B15/167—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes in liquid or vaporisable form, e.g. liquid compositions for electronic cigarettes
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/10—Chemical features of tobacco products or tobacco substitutes
- A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
- A24B15/14—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco made of tobacco and a binding agent not derived from tobacco
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
- A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
- A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
- A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
- A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
- A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
- A24B15/32—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances by acyclic compounds
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
- A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
- A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
- A24B15/36—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a heterocyclic ring
- A24B15/40—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a heterocyclic ring having only oxygen or sulfur as hetero atoms
- A24B15/403—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a heterocyclic ring having only oxygen or sulfur as hetero atoms having only oxygen as hetero atoms
- A24B15/406—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a heterocyclic ring having only oxygen or sulfur as hetero atoms having only oxygen as hetero atoms in a five-membered ring
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F42/00—Simulated smoking devices other than electrically operated; Component parts thereof; Manufacture or testing thereof
- A24F42/10—Devices with chemical heating means
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F47/00—Smokers' requisites not otherwise provided for
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/10—Devices using liquid inhalable precursors
Definitions
- the present invention relates to a tobacco filling for a non-combustion type heated smoking article to be used by filling the non-combustion type heated smoking article.
- the amount of evaporation of the flavor component may be insufficient as compared with cigarette, or the so-called “flavoring sensation” may be felt.
- the present invention suppresses a decrease in the amount of evaporation of a flavor component in a form in which a non-combustion type heated smoking article, in particular, a filling containing a cigarette is heated, and can suppress a “feeling of flavor inhibition”. It is an object of the present invention to provide a tobacco filler for a combustion-type heated smoking article.
- the present inventors can suppress a decrease in the evaporation amount of the flavor component by adding an acid that satisfies a specific condition to the tobacco filling,
- the present inventors have found that it is possible to suppress the “savory taste inhibition feeling” and completed the present invention. That is, the present invention is as follows. ⁇ 1> A tobacco filling for a non-combustion type heated smoking article, comprising a cigarette and a liquid that generates an aerosol, A cigarette filling comprising an acid having a first acid dissociation constant of 4.0 to 6.0 and a boiling point of 366 ° C to 600 ° C.
- ⁇ 2> The tobacco filling according to ⁇ 1>, wherein the acid is at least one selected from the group consisting of ascorbic acid, isoascorbic acid, heneicosanoic acid, lignoceric acid, octacosanoic acid, and nonadecanoic acid.
- the acid is at least one selected from the group consisting of ascorbic acid, isoascorbic acid, heneicosanoic acid, lignoceric acid, octacosanoic acid, and nonadecanoic acid.
- ⁇ 3> The tobacco packing according to ⁇ 1> or ⁇ 2>, wherein the acid content is 0.25% by mass or more and 10% by mass or less of the entire tobacco packing.
- PG propylene glycol
- the non-combustion-type heating smoking article in the form of heating the filling containing cigarettes, it is possible to suppress a decrease in the amount of evaporation of the flavor component and to suppress the "flavoring sensation". it can.
- a cigarette filler for a non-combustion type heated smoking article which is one embodiment of the present invention includes a cigarette and a liquid that generates an aerosol. It is a packing and contains an acid having a first acid dissociation constant of 4.0 or more and 6.0 or less and a boiling point of 366 ° C. or more and 600 ° C. or less.
- the present inventors have revealed various problems with respect to non-combustion-type heated smoking articles, particularly smoking articles in the form of heating a filling containing cigarettes.
- cigarettes may feel different irritation and may cause a “smelling taste sensation” in which physiological spontaneous action such as “seed” occurs. .
- This is thought to be due to the fact that a component that inhibits flavor is contained in the filling, and this component volatilizes with a solvent such as propylene glycol, and it is thought that "feeling of flavor inhibition” is felt.
- the inventors of the present invention have found that the salt formation by the flavor component in the tobacco and the tobacco has a correlation with the first acid dissociation constant (pKa 1 ) representing the strength of the acid, and the first acid dissociation constant is specific.
- salt formation can be suppressed by selecting an acid in the range, and that it is difficult to sense a chemical odor (chemical odor) or the like by selecting an acid having a boiling point higher than a specific temperature. That is, by adding “an acid having a first acid dissociation constant of 4.0 or more and 6.0 or less and a boiling point of 366 ° C. or more and 600 ° C. or less” to the tobacco filling, the evaporation amount of the flavor component can be reduced. It has been found that it is possible to suppress the “feeling of savory taste inhibition”.
- the “first acid dissociation constant” means an acid dissociation constant into water at room temperature (25 ° C.).
- boiling point means a boiling point at a pressure of 760 mmHg.
- non-combustion type heated smoking article “cigarette”, “aerosol-generating liquid”, “first acid dissociation constant of 4.0 to 6.0 and boiling point of 366 ° C. to 600 ° C.
- the “acid” and the like will be described in detail.
- the cigarette filler of the present invention is a cigarette filler for a non-combustion type heated smoking article containing a cigarette and an aerosol-generating liquid, but the non-combustion type heated smoking article of the present invention is filled with the cigarette filler of the present invention.
- a specific structure or the like is not particularly limited, and a known structure can be appropriately employed.
- Examples of the non-combustion type heated smoking article include those having a structure like the non-combustion type heated smoking article 10 shown in FIG. FIG.
- FIG. 1 is a cross-sectional view of a cylindrical non-combustion type heated smoking article 10 cut in the longitudinal direction, and has a structure including a battery 101, a pod 103 for containing a filler 102, a heater 104, and a mouthpiece 105. It has become.
- the cigarette filling of the present invention is filled in the pod 103, and aerosol is generated by heating.
- the heating temperature of the tobacco filler in the non-combustion type heated smoking article is usually 22 ° C. or higher, preferably 100 ° C. or higher, more preferably 150 ° C. or higher, and usually 350 ° C. or lower, preferably 300 ° C. or lower, more preferably 250. It is below °C.
- the heating temperature of the tobacco filling is a non-combustion-type heating smoking article within the above range, the problem of “flavoring taste inhibition” is likely to occur, and the characteristics of the tobacco filling of the present invention can be more effectively utilized. it can.
- the types of tobacco engraved include yellow, Burley, native, and regenerated tobacco, and the parts used are leaves (relaxed), stems, veins (medium bone), roots, flowers, etc. Is mentioned.
- the equivalent sphere diameter is usually 1.5 mm or less, preferably by a measurement method using a projected cross-sectional area (for example, a method using Camsizer (Retsch)). Is 0.5 mm or less, and is usually 0.01 mm or more.
- the tobacco content of the tobacco filler of the present invention is usually 20% by mass or more, preferably 30% by mass or more, more preferably 40% by mass or more, and usually 80% by mass or less, preferably 70% by mass or less. More preferably, it is 60 mass% or less. When it is within the above range, it becomes easier to suppress the decrease in the amount of evaporation of the flavor component, and “feeling of flavor inhibition” can be more effectively suppressed.
- liquid for generating an aerosol examples include polyhydric alcohols such as glycerin, propylene glycol, triethylene glycol, and tetraethylene glycol; and carboxylic acid aliphatic esters such as methyl stearate, dimethyl dodecanedioate, and dimethyl tetradecanedioate.
- the liquid is not limited to one type, and two or more types may be used in combination.
- the liquid for generating the aerosol preferably contains propylene glycol. Propylene glycol is used as a highly safe solution in foods and medical products, and has a low boiling point and easily vaporizes, so that visible smoke can be easily generated.
- the content of the liquid for generating the aerosol of the tobacco filling of the present invention is usually 20% by mass or more, preferably 30% by mass or more, more preferably 40% by mass or more, and usually 80% by mass or less, preferably 70% by mass. % Or less, more preferably 60% by mass or less. When it is within the above range, it becomes easier to suppress the decrease in the amount of evaporation of the flavor component, and “feeling of flavor inhibition” can be more effectively suppressed.
- the tobacco packing of the present invention has an acid having a first acid dissociation constant of 4.0 or more and 6.0 or less and a boiling point of 366 ° C. or more and 600 ° C. or less (hereinafter sometimes abbreviated as “acid”).
- the specific acid is not particularly limited as long as it satisfies the conditions, and a known acid can be appropriately employed depending on the purpose.
- the primary acid dissociation constant of the acid is preferably 4.5 or more, and preferably 5.5 or less.
- the boiling point of the acid is preferably 400 ° C. or higher, and preferably 560 ° C. or lower. If it is within the above range, the “flavoring sensation” can be more effectively suppressed.
- Examples of the acid include ascorbic acid, isoascorbic acid, heneicosanoic acid, lignoceric acid, octacosanoic acid, and nonadecanoic acid.
- ascorbic acid, isoascorbic acid and the like are particularly preferable. When it is as described above, it becomes easier to suppress the decrease in the evaporation amount of the flavor component, and the “feeling of flavor inhibition” can be more effectively suppressed.
- the content of acid in the tobacco packing of the present invention is usually 0.25% by mass or more, preferably 1% by mass or more, and usually 10% by mass or less. When it is within the above range, it becomes easier to suppress the decrease in the amount of evaporation of the flavor component, and “feeling of flavor inhibition” can be more effectively suppressed.
- the cigarette filling of the present invention includes a cigarette and a liquid that generates an aerosol, but since the components such as water normally contained in the cigarette are dissolved in the liquid that generates the aerosol, the cigarette packing of the present invention is also included. It can be said that it contains water.
- the water content of the tobacco packing of the present invention is usually 5% by mass or more, preferably 7.5% by mass or more, more preferably 10% by mass or more, and usually 30% by mass or less, preferably of the entire tobacco packing. Is 25% by mass or less, more preferably 20% by mass or less. When it is within the above range, it becomes easier to suppress the decrease in the evaporation amount of the flavor component, and the “feeling of flavor inhibition” can be more effectively suppressed.
- Examples 1 to 6 and Comparative Examples 1 to 21 Effects of primary acid dissociation constant and boiling point of acid> 100 mg of a liquid prepared by mixing propylene glycol and glycerin at 1: 1 (weight ratio) is added to 100 mg of yellow chopped (made in Japan), and 5% by mass of the acid shown in Table 1 is added in terms of the mass of the entire composition.
- a sample was prepared. The cigarette is pulverized with a home mixer in advance, and then shaken with a sieve (AS200, manufactured by Retch) for 2 minutes under the condition: amplitide-1.5 mm / "g", and the sieve diameter is 0.5 mm. The following were used.
- the prepared sample was placed so as to be attached to a pod dedicated to the trade name “Ploom (registered trademark)” sold by Japan Tobacco Inc., and stored under conditions of 22 ° C. and 60% humidity for 2 days or more. It has been confirmed that the heating temperature of tobacco when using Ploom (at the time of stable operation) is about 160 ° C. to 170 ° C. by prior measurement using a thermocouple.
- the pod produced in the Ploom using a smoking machine (Borgwaldt, RM-26) was attached, and the evaporation amount of the flavor component at the initial 10 puff under the prescribed smoking conditions (55 ml / 2S, smoking interval 30 s) was measured.
- nicotine which is easy to measure
- a smoke filter pad was used for smoke collection.
- the smoke collected on the filter was extracted by shaking with a methanol solvent for 40 minutes, and nicotine was quantified by GC-FID.
- the sensory evaluation of the smoking test was performed by four people, and “chemical odor” was evaluated on a 7-point scale of 1 to 7 as “flavoring sensation of taste” and acid taste.
- “Chemical odor” refers to a chemical odor, which is undesirable when a person smokes. The larger the value, the stronger the chemical odor.
- the evaluation value of the savory taste inhibition feeling and the chemical odor is 2 or less, it is a value that can sufficiently discriminate the difference for the evaluator, and is an area where the effect is excellent.
- the value was described based on the feeling felt during smoking.
- Table 1 shows the physical property values of the acid, the amount of evaporation of the flavor components, and the results of sensory evaluation.
- the graph showing the relationship between the first acid dissociation constant of the acid and the amount of evaporation of the flavor component is shown in FIG. From FIG. 2, the acid having a small first acid dissociation constant has a low flavor component amount, and when the acid dissociation constant is 4.0 or more, in almost all acids, the amount is almost the same as the amount of flavor component not added. The result was obtained. From this result, it was found that the use of an acid having a first acid dissociation constant of 4.0 or more does not cause a decrease in the amount of evaporation of the flavor component. Considering the pH of the acid, the first acid dissociation constant is almost 6.0 or less, so the ideal range is that the first acid dissociation constant is 4.0 or more and 6.0 or less.
- FIG. 4 is a graph showing the relationship between the boiling point of an acid having a first acid dissociation constant of 4.0 or more and 6.0 or less and the chemical odor. It can be seen that an acid having a boiling point of 366 ° C. or higher also has a low chemical odor.
- Examples 7 to 12 Influence of acid content> Except for changing the acid content in isoascorbic acid, lignoceric acid and nonadecanoic acid in the previous example from 5% by mass to 3% by mass, the same procedure as in the previous example was performed. . In addition, in this evaluation, since the evaporation amount of the savory flavor component is the same, only the effect on the savory flavor feeling was focused.
- FIG. 5 is a graph showing the relationship between the acid content and the sense of flavor inhibition. From FIG. 5, it can be confirmed that the acid effect is high even when the content is reduced to 1% by mass. This is simply because the highly effective acid is effective even in a small amount. Acids such as isoascorbic acid, lignoceric acid, and nonadecanoic acid have a high boiling point. It is expected that a high effect will be obtained because it stays inside. When the acid content is excessive, the characteristics of the acid are likely to stand, and thus the preferable content is considered to be 10% by mass or less.
- the tobacco filling of the present invention can be used for smoking by filling a non-combustion type heated smoking article.
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Abstract
Description
また、このような非燃焼型加熱喫煙物品において、充填物に酸を添加する技術も報告されている(特許文献1~3参照。)。
本発明は、非燃焼型加熱喫煙物品、特にたばこ刻を含んだ充填物を加熱する形態における香喫味成分の蒸発量の低下を抑制するとともに、「香喫味阻害感」を抑制することができる非燃焼型加熱喫煙物品用のたばこ充填物を提供することを目的とする。
即ち、本発明は以下の通りである。
<1> たばこ刻とエアロゾルを発生させる液体とを含む非燃焼型加熱喫煙物品用のたばこ充填物であって、
第一酸解離定数が4.0以上6.0以下であり、かつ沸点が366℃以上600℃以下である酸を含むことを特徴とする、たばこ充填物。
<2> 前記酸が、アスコルビン酸、イソアスコルビン酸、ヘンエイコサン酸、リグノセリン酸、オクタコサン酸、及びノナデカン酸からなる群より選択される少なくとも1種である、<1>に記載のたばこ充填物。
<3> 前記酸の含有量が、たばこ充填物全体の0.25質量%以上10質量%以下である、<1>又は<2>に記載のたばこ充填物。
<4> 前記エアロゾルを発生させる液体が、プロピレングリコール(PG)を含む、<1>~<3>の何れかに記載のたばこ充填物。
本発明の一態様である非燃焼型加熱喫煙物品用のたばこ充填物(以下、「本発明のたばこ充填物」と略す場合がある。)は、たばこ刻とエアロゾルを発生させる液体とを含むたばこ充填物であり、第一酸解離定数が4.0以上6.0以下、かつ沸点が366℃以上600℃以下である酸を含むことを特徴とする。
本発明者らは、非燃焼型加熱喫煙物品、特にたばこ刻を含んだ充填物を加熱する形態の喫煙物品について、種々の問題点を明らかとしている。
例えば、たばこ刻を含んだ充填物(通常、エアロゾルを発生させる液体を含む。)に酸を添加すると、香喫味成分の蒸発量が低下してしまう場合がある。これは、添加した酸がエアロゾルを発生させる液体とともにたばこ刻の内部に浸透し、たばこ刻内の香喫味成分と塩を形成してしまうためであると考えられる。加熱温度の高い非燃焼型加熱喫煙物品においては、加熱によって塩が解離したり、温度が高いことによって香喫味成分の蒸発量の低下を抑制できたりすると考えられるが、加熱温度が低い非燃焼型加熱喫煙物品においては、その影響は顕著であると考えられる。
また、非燃焼型加熱喫煙物品を使用した喫煙において、たばことは異なる刺激を受けたり、「むせ」等の生理的な自発動作が生じてしまったりする「香喫味阻害感」を感じる場合がある。これは充填物内に香喫味を阻害する成分が含まれているためであると考えられ、プロピレングリコールのような溶媒とともにこの成分が揮発して、「香喫味阻害感」を感じるものと考えられる。
本発明者らは、酸とたばこ刻中の香喫味成分による塩の形成は、酸の強さを表す第一酸解離定数(pKa1)と相関性があり、第一酸解離定数が特定の範囲である酸を選択することで塩の形成が抑制できること、さらに沸点が特定の温度以上の酸を選択することで、ケミカル臭(薬品臭さ)等を感じにくくなることを明らかとしている。即ち、「第一酸解離定数が4.0以上6.0以下、かつ沸点が366℃以上600℃以下である酸」をたばこ充填物に添加することによって、香喫味成分の蒸発量の低下を抑制できるとともに、「香喫味阻害感」を抑制することができることを見出したのである。
なお、「第一酸解離定数」とは、常温(25℃)における水への酸解離定数を意味するものとする。
また、「沸点」とは、圧力が760mmHgにおける沸点を意味するものとする。
以下、「非燃焼型加熱喫煙物品」、「たばこ刻」、「エアロゾルを発生させる液体」、「第一酸解離定数が4.0以上6.0以下であり、かつ沸点が366℃以上600℃以下である酸」等について詳細に説明する。
非燃焼型加熱喫煙物品としては、図1に示される非燃焼型加熱喫煙物品10のような構造を有するものが挙げられる。図1は、円筒形の非燃焼型加熱喫煙物品10をその長手方向に切断した場合の断面図であり、バッテリー101と充填物102を入れるポッド103およびヒーター104とマウスピース105を有した構造となっている。本発明のたばこ充填物をポッド103に充填して、加熱によりエアロゾルが発生することとなる。
非燃焼型加熱喫煙物品におけるたばこ充填物の加熱温度は、通常22℃以上、好ましくは100℃以上、より好ましくは150℃以上であり、通常350℃以下、好ましくは300℃以下、より好ましくは250℃以下である。たばこ充填物の加熱温度が上記範囲内である非燃焼型加熱喫煙物品であると、「香喫味阻害感」の問題が生じ易く、本発明のたばこ充填物の特性をより有効に活用することができる。
エアロゾルを発生させる液体は、プロピレングリコールを含むことが好ましい。プロピレングリコールは安全性が高い溶液として、食品や医療品に使用されており、沸点が低く気化しやすい性質を持つため可視煙を容易に生成することが可能である。一方、プロピレングリコールは、蒸気圧が高いため、口腔内で容易に揮発しやすい性質がある。そのため、エアロゾル中に含まれていた香喫味を阻害する成分が揮発しやすい雰囲気となり、結果「香喫味阻害感」の問題が生じ易いものと考えられる。従って、本発明のたばこ充填物の特性をより有効に活用することができる。
酸の第一酸解離定数は、好ましくは4.5以上であり、好ましくは5.5以下である。
酸の沸点は、好ましくは400℃以上であり、好ましくは560℃以下である。
上記範囲内であると、「香喫味阻害感」をより効果的に抑制することができる。
この中でも、アスコルビン酸、イソアスコルビン酸等が特に好ましい。
上記のようなものであると、香喫味成分の蒸発量の低下をより抑制し易くなるとともに、「香喫味阻害感」をより効果的に抑制することができる。
本発明のたばこ充填物の水の含有量は、たばこ充填物全体の通常5質量%以上、好ましくは7.5質量%以上、より好ましくは10質量%以上であり、通常30質量%以下、好ましくは25質量%以下、より好ましくは20質量%以下である。上記範囲内であると、香喫味成分の蒸発量の低下より抑制し易くなるとともに、「香喫味阻害感」をより効果的に抑制することができる。
黄色刻(日本産)100mgに対して、プロピレングリコールとグリセリンを1:1(重量比)で混合した液体を100mg添加し、表1に示す酸を組成物全体の質量換算で5質量%添加して、サンプルを作製した。なお、たばこ刻は、予め家庭用ミキサーにて粉砕した後、ふるい(AS200,Retch社製)にて条件:amplitude-1.5mm/“g”において2分間振動させて、ふるい目径0.5mm以下のものを使用した。
作製したサンプルは、日本たばこ産業株式会社から発売されている商品名「Ploom(登録商標)」専用のpodに張り付けるように設置し、2日以上22℃、湿度60%の条件で蔵置した。なお、Ploomを用いた際におけるたばこ刻の加熱温度(安定稼働時)は熱電対を用いた事前の計測により、160℃~170℃程度であることを確認している。
喫煙試験では、喫煙機(Borgwaldt,RM-26)を用いてPloomに作製したpodを装着し、規程の喫煙条件(55ml/2S、喫煙間隔30s)の下、初期10puffにおける香喫味成分の蒸発量を測定した。なお、本実験では香喫味成分として測定が容易なニコチンを成分指標として選択した。煙捕集はケンブリッジフィルターパッドを使用し、フィルターに捕集された煙をメタノール溶媒で40分間振とう抽出し、GC-FIDにてニコチンを定量した。
喫煙試験の官能評価は、4名にて実施し、「香喫味阻害感」と酸の味として「ケミカル臭」を1~7の7段階評価にて実施した。「ケミカル臭」とは、薬品臭さを指し、人が喫煙する上で好ましくない臭いである。数値が大きい程、ケミカル臭が強いことを示す。本実施例の結果において、香喫味阻害感とケミカル臭の評価値が2以下の場合、評価者にとって十分に違いを識別できる値であり、効果が優れている領域とした。評価は喫煙中に感じた感覚にて値を記載した。
酸の物性値、香喫味成分の蒸発量、官能評価の結果をそれぞれ表1に示す。
また、第一酸解離定数が4.0以上6.0以下である酸の沸点と香喫味阻害感の関係を表したグラフを図3に示す。沸点が366℃以上を超えるとほぼ全ての酸において、香喫味阻害感を低減できることが分かり、沸点が香喫味阻害感の低減に重要であることが分かった。
また、第一酸解離定数が4.0以上6.0以下である酸の沸点とケミカル臭の関係を表したグラフを図4に示す。沸点が366℃以上の酸は、ケミカル臭も低くなることが分かる。なお、酸の沸点が高温すぎる場合は、加熱に伴うリリース量が少量となるため、600℃以下が好ましいと考えらえる。
以上より、酸の第一酸解離定数が4.0以上6.0以下で、沸点が366℃以上600℃以下の酸を使用することにより、香喫味成分量を維持した条件において、味や香りへの影響が少なく且つ香喫味阻害感を低減できることが分かった。
先の実施例のイソアスコルビン酸、リグノセリン酸、ノナデカン酸における酸の含有量を、5質量%から3質量%、1質量%に変更した以外は、先の実施例と同様の方法にて実施した。なお、本評価では香喫味成分の蒸発量は同等のため、香喫味阻害感に対する効果のみ着目した。
エアロゾルを発生させる液体を変更した以外は、先の実施例と比較例と同様の方法にて試験を実施した。本試験では、エアロゾルを発生させる液体の溶媒として、プロピレングリコールのほか、グリセリン、ジアセチン、クエン酸トリエチル(TEC)を用い、酸はノナデカン酸を用いた。結果を図6に示す。プロピレングリコールを用いた場合、香喫味阻害感は最も高く、他の液体では低いことが分かる。このことから、最も効果が発現しやすいエアロゾルを発生させる液体がプロピレングリコールであり、プロピレングリコールを全量または少量でも含む場合に本技術が効果的と言える。
Claims (4)
- たばこ刻とエアロゾルを発生させる液体とを含む非燃焼型加熱喫煙物品用のたばこ充填物であって、
第一酸解離定数が4.0以上6.0以下であり、かつ沸点が366℃以上600℃以下である酸を含むことを特徴とする、たばこ充填物。 - 前記酸が、アスコルビン酸、イソアスコルビン酸、ヘンエイコサン酸、リグノセリン酸、オクタコサン酸、及びノナデカン酸からなる群より選択される少なくとも1種である、請求項1に記載のたばこ充填物。
- 前記酸の含有量が、たばこ充填物全体の0.25質量%以上10質量%以下である、請求項1又は2に記載のたばこ充填物。
- 前記エアロゾルを発生させる液体が、プロピレングリコール(PG)を含む、請求項1~3の何れか1項に記載のたばこ充填物。
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