HK1262981A1 - Tobacco filling for non-combustion-type heating smoking article - Google Patents

Description

Tobacco filler for non-combustion heating smoking article

Technical Field

The present invention relates to a tobacco filler for a non-combustion type heated smoking article used for filling the non-combustion type heated smoking article.

Background

In recent years, non-combustion type heated smoking articles that taste and smell without burning tobacco have been developed instead of tobacco, and as typical examples, non-combustion type heated smoking articles in which a pod (pot) -shaped container is filled with a flavor component and an aerosol-generating component and used, and non-combustion type heated smoking articles having a heat source at the tip thereof are known.

In addition, a technique of adding an acid to a filler or a technique of adding an acid-encapsulated capsule to such a non-combustion type heated smoking article has also been reported (see patent documents 1 to 5).

Documents of the prior art

Patent document

Patent document 1: international publication No. 2014/190079

Patent document 2: U.S. patent application publication No. 2015/0020820 specification

Patent document 3: U.S. patent application publication No. 2014/0345631 specification

Patent document 4: international publication No. 2015/101651

Patent document 5: international publication No. 2015/000974

Disclosure of Invention

Problems to be solved by the invention

When smoking is performed using a non-combustion type smoking article, the amount of evaporation of the flavor component may be insufficient compared to tobacco, or a so-called "flavor-blocking sensation" may be felt.

The present invention aims to provide a tobacco filler for a non-combustion heating smoking article, which can suppress a reduction in the amount of evaporation of a flavor component in a form in which the filler including cut tobacco is heated, and can suppress a "feeling of flavor inhibition".

Means for solving the problems

As a result of intensive studies to solve the above problems, the present inventors have found that a salt satisfying specific conditions in a tobacco filler can suppress a decrease in the amount of evaporation of a flavor component and can suppress "a flavor-disturbing feeling", and have completed the present invention.

Namely, the present invention is as follows.

<1> a tobacco filler for a non-combustion type heated smoking article comprising a tobacco shred and an aerosol-generating liquid,

the tobacco filler comprises a dihydrogen salt of a 3-or 4-membered acid having a first acid dissociation constant of 1.0 or less.

<2> the tobacco filler according to <1>, wherein the dihydric salt is a dihydric salt of pyrophosphoric acid.

<3> the tobacco filler according to <1> or <2>, wherein the content of the dihydric salt is 0.1 mass% or more and 10 mass% or less of the entire tobacco filler.

<4> the tobacco filler according to any one of <1> to <3>, wherein the aerosol-generating liquid contains Propylene Glycol (PG).

<5> the tobacco filler according to any one of <1> to <4>, wherein the water content is 5.0 mass% or more and 30 mass% or less of the entire tobacco filler.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, a non-combustion type heated smoking article in which a filler containing tobacco shreds is heated can suppress a decrease in the amount of evaporation of a flavor component and can suppress a "feeling of flavor inhibition".

Drawings

Fig. 1 is a sectional view showing an example of a non-combustion type heated smoking article.

Fig. 2 is a graph showing the relationship between the first acid dissociation constant of the conjugate acid constituting the salt and the amount of evaporation of the fragrance component.

Fig. 3 is a graph showing the relationship between the first acid dissociation constant of the conjugate acid constituting the salt and the taste-masking sensation.

FIG. 4 is a graph showing the relationship between the content of disodium dihydrogen pyrophosphate and the sensation of blocking the aroma.

Detailed Description

The present invention is described by taking specific examples, but the present invention is not limited to the following and can be carried out by appropriately changing the examples as long as the invention does not depart from the gist of the present invention.

< tobacco filler for non-combustion type heating smoking article >

A tobacco filler for a non-combustion heating smoking article (hereinafter, may be simply referred to as "tobacco filler of the present invention") as one aspect of the present invention is a tobacco filler containing a tobacco shred and a liquid that generates an aerosol, and is characterized by containing a dihydrogensalt of a 3-or 4-membered acid having a first acid dissociation constant of 1.0 or less.

The present inventors have clarified various problems with a non-combustion heating smoking article, particularly a smoking article in a form in which filler including tobacco shreds is heated.

For example, if an acid is added to a filler (usually, a liquid that generates an aerosol) containing tobacco shreds, the amount of evaporation of the fragrant components may be reduced. This is considered to be because: the added acid permeates into the interior of the tobacco shreds together with the aerosol-generating liquid, and forms a salt with the fragrant components in the tobacco shreds. It is considered that the salt is dissociated by heating or the evaporation amount of the flavor component can be suppressed from decreasing due to a high temperature in the non-combustion type heated smoking article having a high heating temperature, but the influence thereof is considered to be significant in the non-combustion type heated smoking article having a low heating temperature. In addition, it is not preferable from the viewpoint of production cost to add an acid encapsulated in a capsule.

When smoking a cigarette using a non-combustible heated smoking article, a "smell-blocking feeling" may be felt, which is a stimulus different from that of tobacco or a physiological spontaneous action such as "choking". This is considered to be because a component that inhibits the fragrance is contained in the filling, and this component is considered to volatilize together with a solvent such as propylene glycol, and to give a "feeling of inhibition of fragrance".

The present inventors have found that the addition of a salt which forms an acid by dissociation of water or the like contained in the filler, rather than the direct addition of an acid, exerts its effect without forming a salt of the acid with the flavor component in the tobacco shreds. In order to prevent the dissociated acid from forming a salt with the fragrant odor component, it is necessary to cause thermal evaporation of the acid when the acid salt is hydrolyzed. It is obvious that the acid formed by the dissociation is preferably changed to a strong acid, and the salt is preferably composed of a conjugate base of a strong acid. That is, it was found that by adding "a dihydric salt of a 3-or 4-membered acid having a first acid dissociation constant of 1.0 or less" to a tobacco filler, it is possible to suppress a decrease in the amount of evaporation of a flavor component and to suppress "a taste-disturbing sensation".

The "first acid dissociation constant" refers to an acid dissociation constant in water at normal temperature (25 ℃).

Hereinafter, the "non-combustion type heated smoking article", "tobacco shred", "aerosol-generating liquid", "dihydrogen salt of 3-or 4-membered acid having a first acid dissociation constant of 1.0 or less", and the like will be described in detail.

The tobacco filler of the present invention is a tobacco filler for a non-combustion type heated smoking article containing tobacco shreds and a liquid that generates an aerosol, but the specific configuration and the like of the non-combustion type heated smoking article filled with the tobacco filler of the present invention are not particularly limited, and a known configuration can be suitably employed. Hereinafter, specific examples will be described.

As the non-combustion type heating smoking article, there is exemplified a non-combustion type heating smoking article having a structure like the non-combustion type heating smoking article 10 shown in fig. 1. Fig. 1 is a cross-sectional view of a cylindrical non-combustion heating smoking article cut in the longitudinal direction thereof, and has a structure including a battery 101, a pod 103 in which a filler 102 is incorporated, a heater 104, and a mouthpiece 105. The tobacco filler of the present invention is filled into the pod 103 and an aerosol is generated by heating.

The heating temperature of the tobacco filler in the non-combustion heating smoking article is usually 22 ℃ or higher, preferably 100 ℃ or higher, more preferably 150 ℃ or higher, and usually 350 ℃ or lower, preferably 300 ℃ or lower, more preferably 250 ℃ or lower. If the non-combustion type heated smoking article has a tobacco filler heating temperature within the above range, the problem of "smell-hindering feeling" is likely to occur, and the characteristics of the tobacco filler of the present invention can be utilized more effectively.

Examples of the types of tobacco include yellow tobacco, Burley tobacco, native tobacco, and regenerated tobacco, and examples of the sites of use include leaves (cut filler), stems, veins (cut filler), roots, and flowers.

The cut tobacco is not limited in size, and the equivalent spherical diameter is usually 1.5mm or less, preferably 0.5mm or less, and usually 0.01mm or more by a measurement method using a projected cross-sectional area (for example, a method using a Camsizer (Retsch).

The content of the cut tobacco in the tobacco filler of the present invention is usually 20 mass% or more, preferably 30 mass% or more, more preferably 40 mass% or more, and usually 80 mass% or less, preferably 70 mass% or less, more preferably 60 mass% or less. When the amount is within the above range, the decrease in the amount of evaporation of the fragrant component can be more easily suppressed, and the "smell-blocking feeling" can be more effectively suppressed.

Examples of the aerosol-generating liquid include polyhydric alcohols such as glycerin, propylene glycol, triethylene glycol, and tetraethylene glycol; aliphatic carboxylic acid esters such as methyl stearate, dimethyl dodecanedioate, and dimethyl tetradecanedioate. The number of the liquid is not limited to 1, and 2 or more kinds may be used in combination.

The aerosol-generating liquid preferably comprises propylene glycol. Propylene glycol is used as a highly safe solution for foods and medical products, and has a low boiling point and is easily gasified, so that visible smoke may be easily generated. Propylene glycol, on the other hand, has a high vapor pressure and therefore has a property of being easily volatilized in the oral cavity. Therefore, it is considered that an atmosphere in which components for suppressing the aroma contained in the aerosol are easily volatilized is formed, and as a result, a problem of "smell-blocking feeling" is easily caused. Thus, the characteristics of the tobacco filler of the present invention can be more effectively utilized.

The content of the aerosol-generating liquid in the tobacco filler of the present invention is usually 20% by mass or more, preferably 30% by mass or more, and more preferably 40% by mass or more, and usually 80% by mass or less, preferably 70% by mass or less, and more preferably 60% by mass or less. When the amount is within the above range, the decrease in the amount of evaporation of the fragrant component can be more easily suppressed, and the "smell-blocking feeling" can be more effectively suppressed.

The tobacco filler of the present invention is characterized by containing a dihydrogen salt of a 3-or 4-membered acid having a first acid dissociation constant of 1.0 or less (hereinafter, may be abbreviated as "dihydrogen salt"), but the specific dihydrogen salt is not particularly limited as long as the conditions are satisfied, and a known dihydrogen salt can be suitably used as needed. Hereinafter, specific examples will be described. The term "dihydrogen salt" means a salt containing 2 hydrogen ions (H)⁺) As the salt of the cation, other cations mean that it is not particularly limited.

The first acid dissociation constant of the conjugate acid constituting the dihydrogen salt is preferably 0.8 or less, and usually-1.0 or more.

The number of elements of the conjugate acid constituting the dihydrogenate is 3 or 4, preferably 3.

Examples of the cation other than the hydrogen ion constituting the dihydrogen salt include alkali metal ions such as lithium ion, sodium ion, and potassium ion; alkaline earth metal ions such as magnesium ions and calcium ions; ammonium ions such as ammonium ion and tetramethylammonium ion.

Examples of the conjugated acid constituting the dihydric salt include pyrophosphoric acid.

In the case of the above-mentioned substances, it is easy to further suppress the decrease in the evaporation amount of the fragrant component, and the "smell-blocking feeling" can be more effectively suppressed.

The molecular weight of the conjugate acid constituting the dihydrogenate is usually 90 or more, preferably 120 or more, more preferably 170 or more, and usually 300 or less, preferably 250 or less, more preferably 200 or less. Within the above range, the strong acid of the dissociated dihydrogenate can suppress a moderate decrease in the evaporation amount, and can stay in the aerosol. Since strong acid has a high function as an acid, if it can be present in the aerosol, it can exhibit an effect even in a small amount.

Examples of the dihydric salts include disodium dihydrogen pyrophosphate and dipotassium dihydrogen pyrophosphate.

In the case of the above-mentioned substances, it is easy to further suppress the decrease in the evaporation amount of the fragrant component, and the "smell-blocking feeling" can be more effectively suppressed.

The content of the dihydric salt in the tobacco filler of the present invention is usually 0.1 mass% or more, preferably 0.25 mass% or more, more preferably 1 mass% or more, usually 10 mass% or less, preferably 5 mass% or less. When the amount is within the above range, it is easy to further suppress a decrease in the amount of evaporation of the fragrant component, and "a smell-blocking feeling" can be more effectively suppressed.

The tobacco filler of the present invention contains tobacco shreds and a liquid that generates an aerosol, but the tobacco shreds usually contain moisture, and it can be said that the tobacco filler of the present invention also contains water.

The water content of the tobacco filler of the present invention is usually 5% by mass or more, preferably 7.5% by mass or more, and more preferably 10% by mass or more, and usually 30% by mass or less, preferably 25% by mass or less, and more preferably 20% by mass or less of the entire tobacco filler. When the amount is within the above range, the decrease in the amount of evaporation of the fragrant component can be more easily suppressed, and the "smell-blocking feeling" can be more effectively suppressed.

Examples

The present invention will be described more specifically with reference to the following examples, but may be modified as appropriate without departing from the spirit of the present invention.

< example 1, comparative examples 1 to 6: influence of first acid dissociation constant and boiling point of conjugate acid constituting salt >

To 100mg of yellow tobacco shreds (manufactured in Japan), propylene glycol and glycerin were added in a ratio of 1: 1 (weight ratio) and the salt shown in table 1 was added to the mixture in an amount of 100mg in terms of 5 mass% of the total mass of the composition to prepare a sample. The cut tobacco was pulverized in advance in a household mixer, and then sieved (AS200, manufactured by retuch corporation) under the conditions: the vibration was carried out for 2 minutes under the conditions of amplitude-1.5 mm/"g" using a sieve having a mesh diameter of 0.5mm or less.

The prepared sample was attached to a pod dedicated to the trade name "Ploom (registered trademark)" sold by japan tobacco industries co., ltd, and left at 22 ℃ and 60% humidity for 2 days or more. The heating temperature of the tobacco shreds when Ploom was used (during steady operation) was confirmed to be about 160 to 170 ℃ by a previous measurement using a thermocouple. Since the cut tobacco contains 13 mass% of moisture, the sample thus produced is considered to contain about 6.0 mass% of moisture.

In the smoking test, the prepared pod was attached to Ploom using a smoking machine (Borgwaldt, RM-26), and the amount of the fragrant flavor component of initial 10puff was measured under predetermined smoking conditions (55ml/2S, smoking interval 30S). In this experiment, nicotine, which is easily measured as a component of a flavor, was selected as a component index. The smoke was trapped on a Cambridge filter pad (Cambridge filter pad) and the smoke trapped on the filter was subjected to shaking extraction with methanol solvent for 40 minutes and nicotine was quantified with GC-FID.

The sensory evaluation of the smoking test was performed by 4 persons, and the "feeling of smell inhibition" was evaluated in 7 stages of 1 to 7. As a result of this example, when the evaluation value of the smell inhibition feeling was 2 or less, the evaluation value was a value that the evaluator could sufficiently recognize the difference, and it was regarded as a region having an excellent effect. In the evaluation, a value of 7 indicates a degree to which a person feels impaired in smoking and affects smoking, and the evaluation describes a numerical value by the feeling felt in smoking.

The physical property values of the salt, the evaporation amount of the fragrance component, and the results of the sensory evaluation are shown in table 1.

[ Table 1]

TABLE 1 salt types, physical property values and evaluation results

Fig. 2 is a graph showing the relationship between the first acid dissociation constant of the conjugate acid constituting the salt and the amount of evaporation of the fragrant component. As can be seen from fig. 2, the amount of the fragrant component was the same between the case of adding the dihydric salt and the case of not adding the dihydric salt. In the case of the monohydrogen salt or the salt containing no hydrogen, it was confirmed that the amount of the fragrant component varied. From the results, it was found that the amount of the fragrance component evaporated was constant by adding the dihydrogenated salt.

Next, fig. 3 shows a relationship between a first acid dissociation constant of a conjugate acid constituting a salt and a taste-masking sensation. It was confirmed that the lower the first acid dissociation constant of the conjugate acid constituting the salt, the less the sensation of blocking the aroma odor. The reason why disodium dihydrogen pyrophosphate has the highest effect among the salts used in the present examples is presumably due to the acid strength of the conjugate acid constituting the salt.

From the above results, it is understood that the addition of a dihydrogenated salt having a first acid dissociation constant of a conjugate acid constituting the salt of 1.0 or less can eliminate the sensation of blocking the aroma odor while maintaining the evaporation amount of the aroma component.

< examples 2 to 4: effect of the content of dihydric salt >

The procedure was carried out in the same manner as in the preceding example except that the content of disodium dihydrogen pyrophosphate in the preceding example was changed from 5% by mass to 3% by mass and 1% by mass. In this evaluation, the amount of the fragrance component was the same, and therefore only the effect of blocking the sensation of fragrance was noticed.

[ Table 2]

TABLE 2 evaluation results when the amount of sodium acid pyrophosphate added was changed

FIG. 4 is a graph showing the relationship between the content of disodium dihydrogen pyrophosphate and the taste-masking sensation. From fig. 4, it can be confirmed that the effect of the acid is also high when the content is reduced to 1 mass%. It is envisioned that: strong acids have a high effect as acids, and even a small amount of them can exert an effect if they are present in the aerosol. It is believed that the more strongly the conjugate acid constituting the salt is.

Industrial applicability

The tobacco filler of the present invention may be incorporated into a non-combustible, heated smoking article for smoking.

Claims (5)

1. A tobacco filler for a non-combustible, heated smoking article comprising tobacco filler and an aerosol-generating liquid,

the tobacco filler comprises a dihydrogen salt of a 3-or 4-membered acid having a first acid dissociation constant of 1.0 or less.

2. A tobacco filling according to claim 1, wherein the dihydrogen salt is a dihydrogen salt of pyrophosphoric acid.

3. A tobacco filler according to claim 1 or 2, wherein the content of the dihydric salt is 0.1 mass% or more and 10 mass% or less of the entire tobacco filler.

4. A tobacco filling according to any of claims 1 to 3, wherein the aerosol-generating liquid comprises propylene glycol.

5. A tobacco filler according to any one of claims 1 to 4, wherein the water content is 5.0 mass% or more and 30 mass% or less of the entire tobacco filler.