KR101912026B1 - Low tar menthol cigarette - Google Patents

Abstract

A low tar tar menthol cigarette having a tobacco rod portion and a filter portion recommended as chip paper, the tar portion having a tar amount of 5 mg or less, the filter portion including a single segment composed of a cellulose acetate tow, the filter portion having an air permeability of 25 to 80 mm H ₂ O / 27 mm and a ventilation rate of air inflow from a ventilation hole formed in the chip paper is 55% or more, and menthol is added to the filter portion.

Description

LOW TAR MENTHOL CIGARETTE}

The present invention relates to a filter-attached cigarette having a low amount of tar and to which menthol is added.

A method of adjusting the inflow amount of air by providing a ventilation hole in a filter for the purpose of adjusting a component in smoke in smoking cigarettes with a filter is known.

Further, in a general filter-attached cigarette, it is known that the ventilation resistance of the filter is adjusted in accordance with the amount of components in the smoke.

Patent Document 1 discloses a filter-attached cigarette having a filter having a ventilation resistance of 50 mmH ₂ O / 100 mm (corresponding to 13.5 mmH ₂ O / 27 mm) and a ventilation ratio of 20 to 80%.

In Patent Document 2, a filter-attached cigarette having two filter segments is described. One of the two filter segments is adjusted to be larger than the other one of the filter segments, and a filter is recommended ) Is adjusted to a predetermined range, a sufficient smell is felt even though the concentration of nicotine and tar in the mainstream smoke is reduced.

On the other hand, demand for menthol cigarettes in the Japanese market has increased year by year, and high-menthol cigarettes, which have not been available until now, are being put into the market. Patent Literature 3 discloses a method of adding a perfume such as menthol to a filter to add a perfume solution obtained by dissolving and dispersing menthol in a plasticizer used in a filter manufacturing process to a acetate tow .

Patent Document 4 discloses a means for holding menthol on a carrier of fragrance to prevent the amount of menthol from decreasing according to the elapsed days.

Patent Document 5 discloses a means for preventing deterioration of the menthol amount with respect to the elapsed days by using a sheet having a refracting property.

Patent Document 6 discloses a filter manufacturing method in which fragrance is added in advance to prevent reduction in amount of menthol in smoke depending on the elapsed days.

Patent Document 1: Japanese Utility Model Laid-Open Publication No. 62-86894 Patent Document 2: Japanese Patent Application Laid-Open No. 11-069965 Patent Document 3: Japanese Patent Publication No. 43-28077 Patent Document 4: Japanese Laid-Open Patent Publication No. 2012-29637 Patent Document 5: International Publication No. 2011/118040 Patent Document 6: International Publication No. 2012/004853

The invention disclosed in the above Patent Document 1 adjusts the air permeation resistance of the filter and the inflow rate of air from the opening provided in the chip paper to a predetermined range, but the purpose thereof is not clear.

Further, the invention described in Patent Document 2 aims at reducing the amount of nicotine or tar as a component in smoke and increasing the product ventilation resistance of the cigarette, thereby exhibiting a sufficient smoking feeling.

In a filter-attached cigarette having a high amount of tar having a low ventilation ratio as a property of a cigarette filter, a filter having a low air-flow resistance is used and a cigarette with a filter having a low tar ratio, It is common to use a filter with high air resistance.

As described above, studies have been made on the ventilation resistance and the ventilation ratio (air inflow amount) of the filter. However, the ventilation resistance and the ventilation rate of the cigarette with filter attached with menthol, No attempt was made to adjust the ratio.

On the other hand, the amount of menthol in the smoke at the time of smoking of the filter-attached cigarette having menthol is adjusted by the amount of menthol added to the cigarette, but when the amount of the perfume added to the cigarette is simply increased, Menthol dissolves in the wrapping paper due to the leakage of the menthol dissolved in the wrapping paper, and thus the wrapping paper is adhered to the wrapping paper. Further, menthol content in the smoke increases in proportion to the amount of tar in the cigarette. Therefore, with respect to cigarettes having a tar amount of 5 mg or less, which is generally called low tar, the amount of menthol in the smoke is generally lowered. There is no method other than adding the maximum amount of menthol that can be added to the cigarette without causing the problem of the problem.

In the method described in Patent Document 3, the menthol added to the filter portion is sorbed onto the filter tow during the storage of the product, and the amount of menthol in the smoke significantly decreases depending on the elapsed days.

In the means described in Patent Document 4, when the cost is increased due to the use of the carrier of fragrance or when the carrier is added to the inside of the filter, it is necessary to separate the step of adding the carrier, ) Is complicated and difficult.

As for the invention disclosed in Patent Document 5, as in the invention described in Patent Document 4, there is a concern that the cost is increased and the suitability of the cigarette manufacturing due to the addition of the core sheet to the cigarette flesh.

In the invention described in Patent Document 6, as a method for increasing the amount of menthol in the smoke, a method of increasing the amount of menthol added to the filter is disclosed, but it is necessary to select a plasticizer in which the menthol dissolves to add menthol to the plasticizer of the filter . In general, triacetin e menthol, which is generally used as a plasticizer, is poor in strength, and therefore it is necessary to prepare a solution by mixing a solvent such as polyethylene glycol and dissolving menthol. In addition, when a relatively large amount of menthol is desired to be added, a large amount of plasticizer and other solvent which is soluble in menthol are required, so that there is a concern about the leakage of the liquid to be viscous and the hardness of the filter. When the sorption is intentionally performed on the inside of the filter of the menthol, it is not effective merely to add menthol to the plasticizer and it takes a comparatively long time. For example, menthol is added to the acetate fiber together with menthol When adding them, it is necessary to carry out a high-temperature treatment. However, these processes require separate processes at the time of manufacturing the filter or immediately after the production thereof, and it is difficult to say that these processes are applicable to the actual process.

The ventilation resistance of the filter and the ventilation ratio of the cigarette with filter are not correlated with the menthol concentration in the smoke during smoking and there is no example among menthol products showing the amount of menthol in smoke during smoking of the low tar cigarette, A technique capable of increasing the stability of the amount of menthol in the post-fume smoke was required.

The present invention provides a low tar menthol cigarette having a high amount of menthol in smoke during smoking and a small amount of menthol in the smoke after the device.

As a result of an intensive investigation by the present inventors, it has been found that a low-tar menthol cigarette having a tobacco rod portion and a filter portion recommended as chip paper having a tar amount of 5 mg or less, the filter portion including a single segment composed of a cellulose acetate tow, A resistance of 25 to 80 mm H ₂ O / 27 mm, a ventilation rate of air inflow from a ventilation hole formed in the chip paper is 55% or more, menthol is added to the filter portion, Low tar-menthol cigarette has solved the above-mentioned problem, and reached the present invention.

That is, the present invention is as follows.

[1] A low-tar menthol cigarette having a tobacco rod portion and a filter portion recommended as chip paper and having a tar amount of 5 mg or less, the filter portion including a single segment composed of a cellulose acetate tow, ₂ O / 27 mm, and a ventilation rate of air inflow from a ventilation hole formed in the chip paper is 55% or more, and menthol is added to the filter portion.

[2] The low tar menthol cigarette according to [1], wherein the amount of menthol added to the filter portion is not less than 8 mg / g per one low tar menthol cigarette.

[3] The low tar menthol cigarette according to [1] or [2], wherein the tobacco rod portion or the filter portion has a resistor.

[4] The low tar menthol cigarette according to [3], wherein the resistor is a capsule or orifice.

[5] The low tar menthol cigarette according to any one of [1] to [4], wherein the filter section has a ventilation resistance of 25 to 50 mmH ₂ O / 27 mm and a ventilation rate of air inflow of 70% or more.

[6] The low tar menthol cigarette according to any one of [1] to [5], wherein the circumference of the low tar menthol cigarette is 20.0-27.0 mm.

The low tar menthol cigarette of the present invention has a high amount of menthol in smoke at the time of smoking and a small amount of menthol in the smoke after the device.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the relationship between the device period of the filter-attached cigarette and the reduction rate of the amount of menthol in the smoke.
Fig. 2 is a diagram showing the relationship between the initial amount of menthol added and the release rate of menthol in the filter-attached cigarette after the apparatus. Fig.

Hereinafter, the present invention will be described in detail with reference to embodiments and examples and the like, but the present invention is not limited to the following embodiments and examples, and the present invention may be arbitrarily changed without departing from the gist of the present invention. can do.

The low tar menthol cigarette of the present invention is a filter-attached cigarette having a filter portion recommended as a tobacco rod portion and a chip paper, wherein the filter portion includes a single segment composed of a single cellulose acetate tow, 80 mmH ₂ O / 27 mm, and the ventilation rate of air inflow from the ventilation holes drilled in the chip paper is 55% or more, and menthol with the filter is added.

The cigarette load can adopt the known sun. As a kind of cigarette tobacco of the cigarette, a publicly known thing can be used without any limitation, and the recommendation with the recommendation is a tobacco load. In the tobacco rod, a resistor such as a capsule or an orifice may be disposed inside the tobacco rod for the purpose of adjusting the aeration resistance of the low tar mentol cigarette (filter cigarette).

The filter portion constituting the low tar menthol cigarette of the present invention is recommended as chip paper. The chip paper which can be used in the present invention is not particularly limited and may be air-impermeable.

The chip paper is provided with air introducing means made up of a plurality of openings (ventilation holes) which are laid along the circumferential direction of the recommended filter, so that the ventilation holes of the low tar menthor cigarette The ventilation rate of the inflow of air can be adjusted. Examples of the openings include a structure in which the filter is arranged in a row or more along the circumferential direction of the filter.

The air permeability of the chip paper on which a plurality of apertures are formed is usually 100 to 7,000CU. Here, CU indicates the flow rate (mL, (0.001 L)) passing through 1 cm ² (100 mm ² ) of chip paper for 1 minute (60 seconds) when differential pressure is 100 mmH ₂ O (980.665 Pa).

The ventilation rate of the air inflow of the low tar menthol cigarette of the present invention is 55% or more. The ventilation ratio is preferably at least 61%, more preferably at least 70%. With this ventilation ratio, the smoker feels menthol taste more strongly. The ventilation resistance of the filter at the ventilation ratio is 80 mmH ₂ O / 27 mm or less as described later.

The ventilation rate of the air inflow according to the present invention is defined as the ratio of the air flow rate to the air flow rate at the tip of the airflow when the cigarette with filter (product) is sucked at a standard flow rate of 17.5 cm ³ / The ratio of the flow rate of the air blown into the filter-attached cigarette through the paper is expressed as a percentage.

The ventilation rate of air inflow can be adjusted, for example, by changing the size, number and number of rows of the above-mentioned plurality of openings, or changing the air permeability by changing the material of the chip paper. For example, the position of the opening may be arranged at a position of 12 to 20 mm from the end of the water.

In the present invention, the air flow resistance of the filter portion refers to the air flow resistance of the filter portion when the filter portion is wrapped with air-impermeable rubber so as to prevent air from entering from the side thereof and suctioned at a flow rate of 17.5 cm ³ / PD (mmH ₂ O).

The filter portion constituting the low tar menthol cigarette of the present invention comprises a single segment. That is, the filter portion used in the filter-attached cigarette of the present invention has one single segment composed of a cellulose acetate tow. In addition, the segment constituted by the cellulose acetate tow may have a resistor such as a capsule or an orifice.

The ventilation resistance of the filter portion of the low tar menthol cigarette of the present invention is based on the value of the filter itself not including the resistor when a resistor such as a capsule or an orifice is disposed in the filter portion.

The shape of the capsule or orifice is not particularly limited, and well-known ones can be applied.

The material constituting the single segment composed of the cellulose acetate tow of the filter portion used in the present invention is cellulose acetate. Examples of the cellulose acetate fibers constituting the cellulose acetate tow include those having a single yarn fineness of 1.0 to 8.0 denier and a total fineness of 15000 to 7000 denier and also circular, oval, Y, X, I Shaped fiber cross-sectional shape. The inside of the filter may be, for example, a cellulosic acetate tow filled uniformly.

The air permeation resistance of the filter portion used in the low tar menthol cigarette of the present invention is 25 to 80 mm H ₂ O / 27 mm. Further, "27 mm" used for the unit of the ventilation resistance means the length in the longitudinal direction of the filter portion.

By this air flow resistance of the filter 25mmH ₂ O / 27mm or more, it is possible to sufficiently carry out the filtration of the smoke during smoking. On the other hand, as the air flow resistance of the filter or lower 80mmH ₂ O / 27mm, there is no case that the transient filtering of the smoke generated at the time of smoking, it is possible to lower the filtration rate of the menthol efficiently. Further, since the density of the filter is low, adsorption of menthol in the apparatus becomes difficult to occur.

By setting the ventilation resistance of the filter within this range and by setting the ventilation ratio of the cigarette with filter to a predetermined range to be described later, the concentration of menthol in the smoke can be set in a desired range. In addition, the effect is that, if the air flow resistance of said filter at the same time and more than 25~50mmH ₂ O / 27mm of, the ventilation rate of the air flowing to 70%, can be more satisfactorily obtained.

The adjustment of the aeration resistance of the filter can be adjusted, for example, by appropriately selecting the total fineness (charging amount) and the monofilament fineness of the cellulose acetate tow as conventionally known. Concretely, as a specification of the cellulose acetate tow, by increasing the single yarn fineness and reducing the total fineness, the ventilation resistance can be reduced.

The tow weight used for the filter is a value when the length of the filter is 27 mm, for example, 0.100 to 0.200 g, and the density of the filter can be adjusted by adjusting the weight in this range.

In the low tar menthol cigarette of the present invention, as the ventilation resistance per one (the ventilation resistance of one cigarette with filter), the case where the resistor is absent is generally 20 to 70 mmH ₂ O.

Here, the ventilation resistance of one cigarette with a filter is the differential pressure PD (mmH ₂ O) per one cigarette with filter including the effect of ventilation when sucked at a flow rate of 17.5 cm ³ / sec at one end of the filter. That is, the ventilation resistance of one cigarette with filter means the ventilation resistance measured in the product state where the tobacco rod portion and the filter portion are connected.

The low tar menthol cigarette of the present invention has a tar amount of 5 mg or less. The amount of tar in the present invention means the amount of tar inhaled by the smoker during smoking.

In order to ensure that the tar amount is 5 mg or less, that is, the target tar amount is 5 mg or less, the composition of the tobacco rod included in the tobacco rod is changed, or the ventilation resistance of the filter portion or the ventilation ratio of the low tar menthol cigarette is changed Can be adjusted.

The amount of tar of 5 mg or less can be suitably adjusted, for example, in the range of 0.5 to 5 mg. In the low tar menthol cigarette of the present invention, even a low-tar amount thereof can impart sufficient flavor to menthol to the smoker.

The tar amount of the cigarette with filter is measured in accordance with the ISO smoking condition (ISO4387), for example, 20 measurements as one measurement. Gas chromatography is used for the measurement.

In the low tar menthol cigarette of the present invention, menthol is added to the filter. The place of the menthol in the filter is, for example, added to a portion of 10 to 100% by volume of the cellulose acetate tow constituting the filter. Examples of the addition method include adding to the cellulose acetate tow of the filter before the configuration of the filter-attached cigarette, and adding the filter after the cigarette with the filter is added.

As the method of adding menthol, a known method can be used without particular limitation. Menthol may be synthetic or derived from natural materials.

In the low tar menthol cigarette of the present invention, the amount of menthol added to the filter is preferably 8 mg / dog or more. If the amount of menthol added is 8 mg / g or more, the amount of menthol in the smoked residue after the device is more stable. The fact that the amount of menthol in the smoke after the apparatus becomes more stable means that the release amount of the menthol from the filter portion at the time of smoking after the device with the filter cigarette is kept close to a constant . The amount of menthol added to the filter portion is more preferably 10 mg / dog or more, particularly preferably 12 mg / dog or more. On the other hand, the upper limit of the amount of menthol is 20 mg / dog or less.

The length in the axial direction (longitudinal direction) of the filter usable in the low tar menthol cigarette of the present invention is, for example, 15 to 35 mm.

With respect to the circumference of the low-tar menthol cigarette of the present invention, there may be mentioned suns having a diameter of 20.0 to 27.0 mm, and more preferably, those having a diameter of 24.0 to 26.0 mm. Within these ranges, it is suitable for securing a high menthol concentration in the smoke and stably preserving the concentration of menthol after the apparatus.

With respect to the total length of the low tar menthol cigarette of the present invention, the sun of 80 to 100 mm can be mentioned.

≪ Preparation method of low tar menthol cigarette >

The low tar menthol cigarette of the present invention can be obtained by a known method except that menthol is added to the filter and the air permeation resistance of the filter is in a predetermined range and the ventilation rate of the air inflow is set to a predetermined range . ≪ / RTI >

Even when a resistor such as an orifice is added to the cigarette rod, a known method can be used.

Examples of the tobacco rod constituting the low tar menthol cigarette of the present invention include a tobacco flesh forming a tobacco rod and a wrapper for recommending it. The material and the shape of the tobacco rod are low tar It is possible to use any known one without limitation.

The circumference of the tobacco rod section may be the same range as that of the circumference of the low tar menthol cigarette of the present invention described above.

The length of the tobacco rod in the axial direction may be, for example, 50 to 75 mm.

Example

The present invention will be described in more detail by way of examples, but the present invention is not limited to the description of the following examples unless the gist thereof is exceeded.

≪ Example 1 >

Example  1, 2, and Comparative Example  1, 2

A cigarette having a filter ventilation resistance and a ventilation ratio shown in Table 1 was manufactured for the purpose of verifying that the amount of menthol in the smoke was increased by adopting a cigarette design with a low air permeation resistance of the filter and a high ventilation rate of air inflow , The amount of menthol and the amount of tar in the smoke per cigarette were measured. At this time, the filter thus prepared was stored for 3 weeks at a temperature of 22 ° C and a humidity of 60%, and the menthol was absorbed into the cellulose acetate tow and stabilized, and then used for hoisting the cigarette. The manufactured cigarette was stored in a condition of temperature 22 캜 and humidity 60% for 3 weeks after carrying out general aluminum packing, and the menthol amount and the tar amount in the smoke were measured. 5.9Y35000, for example, is a cellulose acetate having a single-yarn fineness of 5.9 denier, a cross-sectional shape of Y-type, and a total fineness of 35000 denier. The tow spec in the table indicates single yarn fineness, sectional shape and total fineness. It means tow.

The length of the cigarette used in the test was 84 mm, and the filter length was 27 mm. Flesh was American blend type, flesh charge was 0.580g, and 12000ppm menthol was added to weight. Each cigarette was set to have a ventilation resistance and a ventilation ratio of the filter so that the amount of tar at the filter outlet was 5 mg.

The cigarette smoking was carried out in accordance with the ISO smoking conditions, and with respect to the menthol measurement, the number of measurements was 20 times for one measurement, and the measurement was repeated twice for the menthol measurement. , And measurement was performed once. The menthol amount and the tar amount in the smoke were measured using GC-FID7693 (menthol measurement, nicotine measurement) manufactured by Agilent Co., and GC-TCD-7890A (moisture measurement) manufactured by Agilent Co., Measurement was carried out. Regarding the ventilation ratio, SODIMAX manufactured by SODIM Co., Ltd. was used, and the air inflow rate from the opening of the chip paper was measured.

The four cigarettes shown in Table 1 were also subjected to sensory evaluation on the sensation of menthol. In the evaluation method, the question was asked as to whether the feeling of the other three menthol is high, the same or low, in the cigarette of Comparative Example 1 which is the combination of the most common conditions as a control. In this evaluation, the number of people to be targeted was ten, and we carried out significant difference confirmation at significance level 5% by cumulative binomial distribution probability (one side).

Table 2 below shows the menthol amount and the tar amount in smoke as well as the menthol amount divided by the tar amount (hereinafter referred to as M / T ratio), and the index of the amount of menthol when the equivalent amount of tar was obtained . Generally, since the amount of menthol in smoke increases in proportion to the amount of tar, here, the amount of menthol is compared by using a value normalized by the amount of tar. In addition, the presence or absence of a significant difference was described regarding the results of the sensory evaluation.

As clearly shown in Table 2, the higher the ventilation resistance of the filter and the higher the ventilation rate of the air inflow, the higher the menthol amount and the M / T ratio in the smoke. This is considered to be because the filtration rate of tar and menthol is different in relation to the ventilation resistance and the ventilation ratio of the filter. Specifically, when a low airflow resistance filter is used, the amount of menthol condensed / adsorbed on the tow fibers of the filter in addition to the filtration phenomenon of physical smoke inside the filter is reduced due to the small total amount of tow, Menthol content and M / T ratio during smoke increase. In addition, in the case of designing a high ventilation ratio, the passage time of smoke in the filter becomes long and the filtration rate of tar and menthol is generally increased. However, in the filter having low aeration resistance with a small total amount of tow, The filtration rate is difficult to increase and the M / T ratio increases. As a result, compared with the filtration rate of tar, the filtration rate of menthol can be reduced. Also in the sensory evaluation, a difference in menthol sensation was obtained, and it was confirmed that in Examples 1 and 2, the sensation of menthol was significantly higher than that of Comparative Example 1.

Range is considered preferable to the embodiment and the comparative example, the air flow resistance of the filter 80mmH ₂ O / 27mm or less and also is assumed that the ventilation rate is more than 55%, preferably at least 61%, more preferred range, It is assumed that the condition of Example 1 is 50 mmH ₂ O / 27 mm or less and the ventilation ratio is 70% or more. Considering the actual manufacturing process of the filter, the range of available air resistance is a realistic range of 25 mmH ₂ O / 27 mm or more. The material of the filter is characterized by being composed of a cellulose acetate tow.

As described above, it has been demonstrated that the amount of menthol in the smoke is increased by designing the cigarette having a high ventilation rate of air inflow. In this embodiment, a filter having a length of 27 mm is used. However, the present invention is not limited to this embodiment, and the same effect can be expected for any length. With respect to the circumference of this cigarette, although the condition of 24.8 mm is used in the present embodiment, the same effect can be expected in the range of the circumferential zone close to the present embodiment, specifically, 20.0 mm to 27.0 mm , And more preferably in the range of 24.0 mm to 26.0 mm.

≪ Referential Examples 1 to 4 >

The device period in the filter device and the device period in the cigarette packing mode are changed for the purpose of verifying that the amount of menthol in the smoke is stabilized by using a filter having a menthol- With respect to the amount of menthol in the smoke according to the change of the filter period and the device period of the cigarette, the test was carried out with respect to the ventilation resistance and the filter amount of the filter shown in Table 3. Here, in order to exclude the influence of other factors, the test was conducted by changing only the ventilation resistance of the filter without installing the ventilation hole of the filter portion.

Test was carried out in the same manner as in Examples 1 and 2 and Comparative Examples 1 and 2 except for the apparatus condition, the ventilation resistance and the ventilation ratio of the filter.

Table 4 shows the conditions of the device period in filter and cigarette package forms. As the apparatus conditions for the shortest period, it can be said that the apparatus condition is used for the manufacture of the cigarette immediately after the filter is manufactured and the apparatus in the packaging form of the cigarette is not carried out (Condition A) Is a condition in which the filter is manufactured for 2 months after the production of the filter, the cigarette is produced using the filter, and the cigarette is packaged for 2 months (condition G). With respect to each of the cigarettes passing through the conditions A to G, the amount of menthol and the amount of tar in the smoke were measured.

Table 5 and Fig. 1 show the results of the test. The reduction rate shown in Table 5 is a value showing the reduction rate of the M / T ratio in each condition when compared with the M / T ratio of the condition A in which the device is not implemented in the form of a filter device and a cigarette package . FIG. 1 shows the reduction ratio of the M / T ratio under each condition.

As apparent from Table 5 and Fig. 1, the longer the device period in the filter device period and the cigarette packing period, the smaller the value of the amount of menthol obtained. The results are shown in Table 1. The results are shown in Table 1. The results are shown in Table 1. The results are shown in Table 1. The results are shown in Table 1. The results are shown in Table 1. The results are shown in Table 1, T ratio is large. This is thought to be because sorption of menthol to the filter can be reduced compared with that of the pain resistance because the tow weight is low in the filter having a low aeration resistance and the release efficiency per unit menthol amount is high.

As a result, it was proven that the use of a filter having a low air permeability resistance of the filter makes it possible to keep the amount of menthol in the smoke stable. This effect can be obtained in the same manner even when the ventilation resistance is provided with a high rate of ventilation to a filter having a low air resistance, and the amount of menthol in the smoke is high and the menthol is easily stably maintained even after the device It becomes possible to produce cigarettes.

≪ Referential Examples 5 to 8 &

For the purpose of verifying that the amount of menthol in the filter is more than 8 mg in terms of amount contained per one, the amount of menthol in the filter is made more stable, the filter ventilation resistance is made constant, The test was conducted by changing the period of the device. Table 6 shows the amount of menthol uptake in the filter. Also here, in order to exclude the influence of other influencing factors as in the reference examples 1 to 4, the test was conducted by changing only the ventilation resistance of the filter without installing a ventilation hole in the filter part.

The device environment of the filter was performed at a temperature of 22 ° C and a humidity of 60% in the same manner as in Reference Examples 1 to 4. The period of the device for the filter was changed from 2 weeks (not shown) to 2 weeks , The test was carried out under the conditions of 5 weeks (5 W) and 2 months (2 M), and the release rate was expressed as a percentage of released menthol in the filter from the menthol amount in the filter. did. Here, only the effect of the filter device is examined by changing only the device period of the filter without performing the device in the cigarette package form, but the release rate is further reduced by further performing the device in the cigarette package form It is expected from Reference Examples 1 to 4 described above. Therefore, in the test here, menthol is not released to the flesh of the tobacco rod portion, but menthol is released from the filter portion alone. The test was carried out in the same manner as in Examples 1 and 2 and Comparative Examples 1 and 2 except for the amount of menthol reduction, the ventilation ratio and the period of the filter device. The test results are shown in Table 7 and FIG.

As can be seen from Table 7 and FIG. 2, it can be seen that the release rate is stable with a change in aging as the amount of menthol uptake in the filter is larger. Compared with the reference examples 5 and 6, The change tolerance is strong. This is because the effect of sorption of menthol can be reduced by adding a large amount of menthol to the amount of menthol added above the amount of menthol to be added to the tow. In this effect, when a filter having a lower aeration resistance than those in Reference Examples 5 to 8 is used, the amount of menthol that is sorbed on the tow itself can be reduced, so that it is assumed that the effect is exerted more. From the above results, it was proved that the amount of menthol in the filter is stabilized in the amount of menthol in the smoke when it is 8 mg or more in an amount contained per one. It is supposed that the amount of menthol in the more suitable filter is 10 mg or more, more preferably 12 mg or more, which corresponds to the condition of Reference Example 8.

≪ Example 3 and Comparative Examples 3 and 4 >

In Examples 1 and 2 and Comparative Examples 1 and 2, in order to verify the effectiveness of the comparative test in which the amount of tar was 5 mg, or even in the case where the present technology was aimed at 1 mg, which is a lower tar amount, The same tests as in Examples 1 and 2 and Comparative Examples 1 and 2 were conducted. In addition, the same evaluation was made for the sensory evaluation.

Table 9 shows the results of the test, showing the M / T ratio in addition to the menthol amount and the tar amount in the smoke.

Table 9 shows that the highest amount of menthol was obtained in Example 3, and the highest result was obtained even when the M / T ratio was compared. As to the evaluation of sensation of menthol by sensory evaluation, in Embodiment 3, a feeling of menthol having a significantly higher degree can be obtained. Similar to the evaluation of Examples 1 and 2 and Comparative Examples 1 and 2, Is significantly different, it is assumed that a significant difference has occurred. From the above, it was confirmed that the present technology is effective even in a range where the amount of tar is extremely low.

Claims (6)

A low tar tar menthol cigarette having a tobacco rod portion and a filter portion recommended as chip paper, the tar portion having a tar amount of 5 mg or less, the filter portion including a single segment composed of a cellulose acetate tow and the filter portion having an air permeability of 25 to 46 mm H ₂ O / And a ventilation rate of air inflow from a ventilation hole penetrated into the chip paper is 70% or more, and menthol is added to the cellulose acetate tow of the filter portion to add menthol, Cigarette. The method according to claim 1,
Menthol cigarette, wherein the amount of menthol added to the filter portion is at least 8 mg / g of low tar menthol cigarette. 3. The method according to claim 1 or 2,
Wherein the tobacco rod portion or the filter portion has a resistor. The method of claim 3,
Wherein the resistor is a capsule or orifice. 3. The method according to claim 1 or 2,
Low tar menthol cigarette wherein the circumference of the low tar menthol cigarette is 20.0-27.0 mm. delete

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