JPWO2015152017A1 - Low tar menthol cigarette - Google Patents

Abstract

A low tar menthol cigarette having a tobacco rod part and a filter part wound with chip paper and having a tar amount of 5 mg or less, wherein the filter part includes a single segment composed of cellulose acetate tow, The ventilation resistance of the filter part is 25 to 80 mmH 2 O / 27 mm, the ventilation rate of air inflow from the ventilation hole drilled in the chip paper is 55% or more, and menthol is added to the filter part. Provide low tar menthol cigarettes.

Description

  The present invention relates to a cigarette with a filter having a low tar amount and having menthol added thereto.

In a cigarette with a filter, for the purpose of adjusting the components in the smoke during smoking, a method of adjusting the inflow of air by providing a ventilation hole in the filter is known.
Further, it is known that a general cigarette with a filter adjusts the ventilation resistance of the filter in accordance with the amount of components in the smoke.
Patent Document 1 discloses a cigarette with a filter 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%. ing.
Patent Document 2 describes a cigarette with a filter having two filter segments. One of the two filter segments is adjusted to be larger than the ventilation resistance of the other filter segment, and the filter is wound. It is described that, by adjusting the air inflow amount from the chip paper to a predetermined range, the nicotine and tar concentrations in the mainstream smoke are reduced, but a sufficient squeeze is exhibited.
On the other hand, demand for menthol cigarettes in the Japanese market has been increasing year by year, and high menthol cigarettes that have never been used before have been put on the market. In Patent Document 3, as a method of adding a fragrance such as menthol to a filter, an aroma solution in which menthol is dissolved and dispersed in a plasticizer used in a filter manufacturing process is added to acetate tow. Have been described.
Patent Document 4 describes a means for holding a menthol on a fragrance carrier and preventing a decrease in the amount of menthol with the elapsed days.
Patent Document 5 proposes a means for preventing a decrease in the amount of menthol with respect to the number of elapsed days using a sheet having a fragrance retention property.
Patent Document 6 describes a method for manufacturing a filter in which a perfume is added and sorbed in advance in order to prevent a reduction in the amount of menthol in smoke accompanying the elapsed days.

Japanese Utility Model Publication No. 62-86894 JP-A-11-0699965 Japanese Patent Publication No. 43-28077 JP 2012-29637 A International Publication No. 2011/11840 International Publication No. 2012/004853

The invention described in Patent Document 1 described above is such that the airflow resistance of the filter and the inflow rate of air from the opening provided in the chip paper are adjusted to a predetermined range, but the purpose is not clear.
Moreover, in the invention described in Patent Document 2, it is an object to provide a sufficient sucking power by increasing the product ventilation resistance of cigarette while reducing the amount of nicotine and tar as smoke components.
As a cigarette filter, a cigarette with a filter having a low ventilation rate and a high tar amount uses a low ventilation resistance filter, and a cigarette with a high ventilation rate and a low tar amount filter has a high ventilation resistance filter. It is common to use.
As described above, although research focusing on the ventilation resistance and ventilation rate (air inflow rate) of the filter has been conducted, it specializes in cigarettes with a filter to which menthol is added, especially cigarettes with a low tar amount. No attempt has been made to adjust its ventilation resistance or ventilation rate.
On the other hand, the amount of menthol in smoke during smoking of a cigarette with a filter having menthol is adjusted by the amount of menthol added to the cigarette, but if the amount of fragrance added to the cigarette is simply increased, The wrapping paper covering the incision bleeds out the menthol in which the tobacco pigment is dissolved and adheres to the wrapping paper. In addition, since the amount of menthol in the smoke increases in proportion to the amount of cigarette tar, the amount of menthol in the smoke generally decreases for cigarettes whose tar amount is generally 5 mg or less. As a solution to this problem, there is no method other than adding the maximum amount of menthol that can be added without causing problems such as bleeding.

In the method described in Patent Document 3, the menthol added to the filter part is sorbed on the tow of the filter during storage of the product, and the amount of menthol in the smoke significantly decreases with the elapsed days.
In the means described in Patent Document 4, the increase in cost due to the use of a fragrance carrier or the addition of a carrier inside the filter requires a separate addition step of the carrier, which makes the production suitability complicated. In addition, there are problems such as difficulty.
Regarding the invention described in Patent Document 5, as in the case of the invention described in Patent Document 4, there are concerns about an increase in cost and problems with cigarette manufacturing suitability associated with the addition of a fragrance sheet to the cigarette engraving.
In the invention described in Patent Document 6, a method for increasing the amount of menthol added to the filter is disclosed as a method for increasing the amount of menthol in the smoke, but menthol dissolves because menthol is added to the plasticizer of the filter. It is necessary to select a plasticizer. Since menthol is hardly soluble in triacetin generally used as a plasticizer, it is necessary to prepare a perfumed solution by mixing a solvent such as polyethylene glycol and dissolving menthol. In addition, if you want to add a relatively large amount of menthol, a large amount of plasticizer and other solvent soluble in menthol is required, so there is a concern about the influence on the exudation of the scented liquid and the hardness of the filter. . In addition, when intentionally sorbing menthol into the filter, adding menthol to the plasticizer is not effective, and it takes a relatively long time. When it is added, it is necessary to perform a high temperature treatment. However, these steps need to be provided separately during the production of the filter or immediately after the production, and are not considered to be techniques applicable to the actual steps.

  There is no example that examined the ventilation resistance of the filter and the ventilation rate of the cigarette with filter in relation to the menthol concentration in the smoke during smoking. Among menthol products, the amount of menthol in the smoke during smoking of low-tar cigarettes, and after storage There is a need for technology that can improve the stability of the amount of menthol in smoke.

  The present invention provides a low tar menthol cigarette in which the amount of menthol in smoke during smoking is increased and the change in the amount of menthol in smoke after storage is small.

As a result of intensive studies by the inventor, a low tar menthol cigarette having a cigarette rod portion and a filter portion wound with chip paper and having a tar amount of 5 mg or less, the filter portion is made of cellulose acetate tow. The ventilation resistance of the filter part is 25-80 mmH ₂ O / 27 mm, and the ventilation rate of air inflow from the ventilation hole drilled in the chip paper is 55% or more. It has been found that a low tar menthol cigarette in which menthol is added to the filter part can solve the above-mentioned problems.

That is, the present invention is as follows.
[1] A low-tar menthol cigarette having a cigarette rod portion and a filter portion wound with chip paper and having a tar amount of 5 mg or less, wherein the filter portion includes a single segment composed of cellulose acetate tow. And the ventilation resistance of the filter part is 25 to 80 mmH ₂ O / 27 mm, and the ventilation rate of air inflow from the ventilation hole drilled in the chip paper is 55% or more. Low tar menthol cigarette with menthol added.
[2] The low tar menthol cigarette according to [1], wherein the amount of menthol added to the filter portion is 8 mg / tube or more per low tar menthol cigarette.
[3] The low tar menthol cigarette according to [1] or [2], wherein the tobacco rod part or the filter part has a resistor.
[4] The low tar menthol cigarette according to [3], wherein the resistor is a capsule or an orifice.
[5] The low tar menthol according to any one of [1] to [4], wherein the ventilation resistance of the filter portion is 25 to 50 mmH ₂ O / 27 mm, and the ventilation rate of air inflow is 70% or more. cigarette.
[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 to 27.0 mm.

  In the low tar menthol cigarette of the present invention, the amount of menthol in smoke during smoking is increased, and the amount of menthol in smoke after storage is small.

It is a figure which shows the relationship between the storage period of a cigarette with a filter, and the reduction rate of the amount of menthol in smoke. It is a figure which shows the relationship between the initial menthol addition amount and the release rate of a menthol in the cigarette with a filter after storage.

  Hereinafter, the present invention will be described in detail with reference to embodiments, examples, etc., but the present invention is not limited to the following embodiments, examples, etc., and can be arbitrarily set within the scope of the present invention. Can be changed and implemented.

The low tar menthol cigarette of the present invention is a cigarette with a filter having a filter portion wound with a tobacco rod portion and chip paper, and the filter portion is a single segment composed of a single cellulose acetate tow. The ventilation resistance of the filter part is 25 to 80 mmH ₂ O / 27 mm, and the ventilation rate of air inflow from the ventilation hole drilled in the chip paper is 55% or more, Is added with menthol.

  A well-known aspect can be employ | adopted for a tobacco rod. Cigarette cigarettes of known types can be used without particular limitation, and a cigarette rod wrapped with a wrapping paper is used. 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 airflow resistance of the low tar menthol cigarette (filtered cigarette).

The filter portion constituting the low tar menthol cigarette of the present invention is wound with chip paper. The chip paper that can be used in the present invention is not particularly limited, and air-impermeable paper may be used.
The chip paper was drilled in the chip paper of the low tar menthol cigarette by providing air inflow means consisting of a plurality of holes (ventilation holes) drilled along the circumferential direction of the filter to be wound. The ventilation rate of air inflow from the ventilation hole can be adjusted. As an aspect of opening, the aspect provided so that it may become 1 or more rows along the circumferential direction of a filter can be mentioned.
The air permeability of the chip paper formed with a plurality of perforated holes is usually 100 to 7000 C.U. It is. Here, C.U. is a flow rate (mL, (0.001 L) passing through 1 cm ² (100 mm ² ) of chip paper in 1 minute (60 seconds) when the differential pressure is 100 mmH ₂ O (980.665 Pa). )).

The ventilation rate of air inflow of the low tar menthol cigarette of the present invention is 55% or more. This ventilation ratio is preferably 61% or more, and more preferably 70% or more. At such a ventilation rate, the smoker feels a stronger menthol flavor. The ventilation resistance of the filter at this ventilation ratio is 80 mmH ₂ O / 27 mm or less as will be described later.
The ventilation rate of air inflow in the present invention refers to chip paper (having air inflow means) with respect to the air flow rate at the suction end when a cigarette with filter (product) is sucked at a standard flow rate of 17.5 cm ³ / sec. The ratio of the flow rate of the air taken into the cigarette with a filter is expressed as a percentage.
The ventilation rate of air inflow can be adjusted by changing the size, number, and number of rows of the 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 suction end.

In the present invention, the ventilation resistance of the filter portion refers to a filter when the filter portion is covered with air-impermeable rubber so that air does not flow in from the side surface and sucked from one end at a flow rate of 17.5 cm ³ / sec. It is the differential pressure PD (mmH ₂ O) in the part.

The filter part which comprises the low tar menthol cigarette of this invention contains a single segment. That is, the filter part used for the cigarette with a filter of the present invention has one single segment composed of cellulose acetate tow. The segment made of 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 that does not include 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 a known one can be applied.
The material which comprises the single segment comprised with the cellulose acetate tow of the filter part used for this invention is a cellulose acetate. Examples of the cellulose acetate fiber constituting the cellulose acetate tow include an embodiment in which the single yarn fineness is about 1.0 to 8.0 denier and the total fineness is 15000 to 70000 denier, and is circular or elliptical. , Y-shaped, X-shaped, and I-shaped fiber cross-sectional shapes. For example, the inside of the filter can be uniformly filled with cellulose acetate tow.
Flow resistance of the filter unit used for low tar menthol cigarettes of the present invention is a 25~80mmH ₂ O / 27mm. “27 mm” used as a unit of ventilation resistance means the length of the filter portion in the longitudinal direction.
When the ventilation resistance of the filter is 25 mmH ₂ O / 27 mm or more, smoke can be sufficiently filtered during smoking. On the other hand, when the ventilation resistance of the filter is 80 mmH ₂ O / 27 mm or less, excessive filtration of smoke does not occur during smoking, and the filtration rate of menthol can be efficiently reduced. Also, the low density of the filter makes it difficult for menthol to adsorb during storage.
The ventilation resistance of the filter is within this range, and the ventilation ratio of the cigarette with filter is set to a predetermined range described later, whereby the menthol concentration in the smoke can be kept within a desired range. In addition, this effect can be obtained better when the ventilation resistance of the filter portion is 25 to 50 mmH ₂ O / 27 mm and the ventilation rate of air inflow is 70% or more.
Adjustment of the ventilation resistance of the filter can be adjusted by appropriately selecting, for example, the total fineness (filling amount) and single yarn fineness of cellulose acetate tow, as is conventionally known. Specifically, as the specifications of cellulose acetate tow, the airflow resistance can be reduced by increasing the single yarn fineness and reducing the total fineness.
The tow weight used for the filter is, for example, 0.100 to 0.200 g as a value when the filter length is 27 mm, and the density of the filter can be adjusted by adjusting the weight within this range. it can.

In the low tar menthol cigarette of the present invention, as the ventilation resistance per one (the ventilation resistance of one cigarette with a filter), when there is no resistor, an embodiment of approximately 20 to 70 mmH ₂ O can be exemplified. .
Here, the ventilation resistance of one cigarette with a filter is a differential pressure PD (mmH per one cigarette with a filter including the effect of ventilation when sucked at a flow rate of 17.5 cm ³ / sec from one end of the filter. ₂ O). That is, the ventilation resistance of one cigarette with a filter is the ventilation resistance measured in the state of the product in which the tobacco rod part and the filter part are connected.

The low tar menthol cigarette of the present invention has a tar amount of 5 mg or less. The tar amount in the present invention is the amount of tar that a smoker inhales during smoking.
In order to make the tar amount 5 mg or less, that is, in order to make the target tar amount 5 mg or less, the composition of the tobacco engraved in the tobacco rod is changed, the ventilation resistance of the filter part, the low tar It can be adjusted by changing the ventilation rate of the menthol cigarette.
As an aspect of the tar amount of 5 mg or less, it can be appropriately adjusted within a range of 0.5 to 5 mg, for example. The low tar menthol cigarette of the present invention can give a smoker a sufficient menthol flavor even with such a low tar amount.
The tar amount of the cigarette with a filter is measured according to ISO smoking conditions (ISO 4387), for example, 20 samples 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 addition place of the menthol in a filter can mention the aspect added to the 10 to 100 volume% part of the cellulose acetate tow which comprises a filter, for example. As the addition method, a method of adding to the cellulose acetate tow of the filter in advance before the construction of the cigarette with filter can be mentioned, and a method of adding after the construction of the cigarette with filter can also be mentioned.
As a method for adding menthol, a known method can be used without particular limitation. Menthol may be synthetic or natural.
In the low-tar menthol cigarette of the present invention, the amount of menthol added to the filter is preferably 8 mg / piece or more. When the amount of menthol added is 8 mg / piece or more, the amount of menthol in the smoke after storage becomes more stable. The amount of menthol in the smoke after storage is more stable because the release amount from the filter part of the menthol when smoking after storing a cigarette with a filter is close to constant even if the storage time elapses It is to be kept in. The amount of menthol added to the filter part is more preferably 10 mg / line or more, and particularly preferably 12 mg / line or more. On the other hand, as an upper limit of the amount of menthol, the aspect which is 20 mg / piece or less can be mentioned.

The length in the axial direction (longitudinal direction) of the filter that can be used in the low tar menthol cigarette of the present invention can be, for example, 15 to 35 mm.
Moreover, about the periphery of the low tar menthol cigarette of this invention, the aspect of 20.0-27.0 mm can be mentioned, More preferably, the aspect of 24.0-26.0 mm can be mentioned. Within these ranges, it is suitable for securing a high menthol concentration in the smoke and stable storage of the menthol concentration after storage.
About the full length of the low tar menthol cigarette of this invention, an aspect of 80-100 mm can be mentioned.

<Method for producing low tar menthol cigarette>
The low tar menthol cigarette of the present invention is a known method except that menthol is added to the filter, the ventilation resistance of the filter is within a predetermined range, and the ventilation rate of air inflow is set within the predetermined range. Can be used.
A known method can also be used when a resistor such as an orifice is incorporated in the tobacco rod.

Examples of the tobacco rod portion constituting the low tar menthol cigarette of the present invention include an embodiment including a tobacco engraved to form a tobacco rod and a wrapping paper around which the cigarette is wound. Any known low tar can be used without limitation.
The circumference | surroundings of a tobacco rod part can mention the same range as the circumference | surroundings of this invention low tar menthol cigarette demonstrated above.
As for the axial length of a tobacco rod part, 50-75 mm can be mentioned, for example.

  Examples The present invention will be described more specifically with reference to examples. However, the present invention is not limited to the description of the following examples unless it exceeds the gist.

<Example 1>
Examples 1 and 2 and Comparative Examples 1 and 2
For the purpose of verifying that the amount of menthol in the smoke is increased by using a cigarette design with a low ventilation resistance of the filter and a high ventilation rate of air inflow, the cigarette with the filter ventilation resistance and ventilation rate shown in Table 1 is used. Was prepared, and the amount of menthol in smoke and the amount of tar per cigarette were measured. At this time, the produced filter was stored and stored under conditions of a temperature of 22 ° C. and a humidity of 60% for 3 weeks, and the menthol was sufficiently sorbed and stabilized on cellulose acetate tow before being used on a cigarette roll. . The produced cigarette was stored and stored under conditions of a temperature of 22 ° C. and a humidity of 60% for 3 weeks after carrying out general aluminum packaging, and the amount of menthol in smoke and the amount of tar were measured. The tow spec in the table indicates single yarn fineness, cross-sectional shape, and total fineness. For example, 5.9Y35000 has a single yarn fineness of 5.9 denier, a cross-sectional shape of Y-type, and a total fineness of 35000 denier. Of cellulose acetate tow.

  The cigarette used for the test had a total length of 84 mm and a filter length of 27 mm. An American blend type was used for the chopping, the filling amount of the chopping was 0.580 g, and 12000 ppm of menthol was added to the chopping weight. In addition, the ventilation resistance of the filter and the ventilation ratio were set so that each cigarette had a tar amount of 5 mg at the filter outlet.

Cigarette smoking is carried out in accordance with ISO smoking conditions. For menthol measurement, 20 are counted as one measurement, and the measurement is repeated twice. For tar measurement, 20 is counted as one measurement. Performed once. The amount of menthol and tar in smoke was determined by using GC-FID7693 (menthol measurement, nicotine measurement) manufactured by Agilent, and GC-TCD-7890A (water measurement) manufactured by Agilent. Measurements were made on the amount. About the ventilation ratio, the air inflow ratio which flows in from the opening part of a chip paper was measured using SODIMAX by SODIM.
Moreover, sensory evaluation about how to feel menthol was implemented together about four cigarettes shown in Table 1 produced. In the evaluation method, the comparative example 1 which is a combination of the most common conditions among the four cigarettes was used as a control, and the other three menthols were questioned by one of two choices: high, identical or low. Carried out. At the time of this evaluation, the number of subjects was 10, and a significant difference was confirmed at a significance level of 5% based on the cumulative binomial distribution probability (one side).
Table 2 below shows the value obtained by dividing the amount of menthol and the amount of tar in the smoke by dividing the amount of menthol by the amount of tar (hereinafter referred to as the M / T ratio). It can be an indicator for the difference in quantity. Generally, since the amount of menthol in smoke increases in proportion to the amount of tar, the amount of menthol was compared by using a value normalized by the amount of tar. Moreover, the presence or absence of a significant difference was described about the result of sensory evaluation.

  As apparent from Table 2, the smoke menthol amount and the M / T ratio became higher as the cigarette design had a lower ventilation resistance of the filter and a higher ventilation rate of air inflow. This is presumably because tar and menthol have different filtration rates in the relationship between the ventilation resistance of the filter and the ventilation rate. Specifically, when a filter with low ventilation resistance is used, in addition to the physical smoke filtration phenomenon inside the filter, the amount of menthol condensed / adsorbed on the tow fiber of the filter is small. As a result, the amount of menthol in smoke and the M / T ratio are increased. In addition, when the high ventilation ratio is designed, the smoke passage time inside the filter is longer, and generally the filtration rate of tar and menthol is higher. The filtration rate of menthol is unlikely to increase, and the M / T ratio increases. As a result, it is possible to reduce the filtration rate of menthol as compared with the filtration rate of tar. Also in the sensory evaluation, a result in which a difference in menthol feeling was obtained, and it was confirmed that Examples 1 and 2 have a significantly higher feeling of menthol than Comparative Example 1.

The range considered to be more preferable than the present example and the comparative example is assumed that the ventilation resistance of the filter is 80 mmH ₂ O / 27 mm or less and the ventilation ratio is 55% or more, preferably 61% or more. 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 the ventilation resistance that can be manufactured is a practical range of 25 mmH ₂ O / 27 mm or more. The material of the filter is composed of cellulose acetate tow

  From the above, it was demonstrated that the amount of menthol in the smoke was increased by using a cigarette design with a high ventilation rate of air inflow. In this embodiment, a filter having a filter length of 27 mm is used. However, the present invention is not limited to this embodiment, and the same effect can be expected at any length. Moreover, about the circumference of this cigarette, in this embodiment, the condition of 24.8 mm was used. However, the same effect is obtained in the circumferential band close to this embodiment, specifically, in the range of 20.0 mm to 27.0 mm. Can be expected, and more preferably in the range of 24.0 mm to 26.0 mm.

<Reference Examples 1-4>
For the purpose of verifying that the amount of menthol in smoke is stable when a menthol-scented filter is stored by using a filter with low ventilation resistance, the storage period of the filter and the storage period in the cigarette packaging form are A test was conducted on the amount of menthol in the smoke according to the change in the storage period of the filter and cigarette with the ventilation resistance and filter scent amount of the filter shown in Table 3. Here, in order to exclude the influence of other factors, the ventilation hole of the filter part was not provided, and only the ventilation resistance of the filter was changed and the test was performed.
The test was carried out in the same procedure as in Examples 1 and 2 and Comparative Examples 1 and 2 except for the filter storage conditions, ventilation resistance and ventilation rate.

  Table 4 shows the conditions of the storage period in the filter and cigarette packaging form. Storage conditions for the shortest period include those used for cigarette manufacture immediately after the filter is produced and are not stored in cigarette packaging (Condition A), while storage conditions for the longest period Then, after preparation of a filter, after storing for 2 months, after making a cigarette using the filter, the conditions which stored the cigarette for 2 months in the packaging form are mentioned (condition G). About each cigarette which passed through conditions AG, the measurement about the amount of menthol in smoke and the amount of tar was implemented.

  Table 5 and FIG. 1 show the test results. The reduction rate shown in Table 5 is a value indicating the reduction rate of the M / T ratio in each condition when compared with the M / T ratio in Condition A where filter storage and cigarette packaging are not performed. It is. FIG. 1 illustrates the reduction rate of the M / T ratio under each condition.

  As is apparent from Table 5 and FIG. 1, the longer the storage period of the filter and the storage period in the cigarette packaging form, the smaller the value of menthol obtained was obtained. Moreover, the result that the reduction rate of M / T ratio becomes large is confirmed, so that the ventilation resistance of a filter is large, and the reference examples 2-4 are compared with the reference example 1 which satisfy | fills the requirements of the filter ventilation resistance of Claim 1, It can be seen that the reduction rate of the M / T ratio is large. This is thought to be because sorption of menthol to the filter can be reduced compared to that of high ventilation resistance because the tow weight is low in the low ventilation resistance filter, and the release efficiency per unit menthol amount is high.

  From the above results, it was demonstrated that the amount of menthol in the smoke is easily maintained stably by using a filter having a low ventilation resistance. This effect can be obtained in the same way even when it is used in combination with a condition where the ventilation rate is high with respect to a filter with low ventilation resistance, and the amount of menthol in the smoke becomes high and the menthol is kept even after storage. It becomes possible to produce a cigarette that is easily maintained stably.

<Reference Examples 5-8>
For the purpose of verifying that the amount of menthol in the smoke is more stable when the amount of menthol added in the filter is 8 mg or more per one, the filter ventilation resistance is kept constant. A test was conducted in which the amount of menthol in the filter and the storage period of the filter were changed. Table 6 shows the amount of menthol added in the filter. In this case as well, in order to exclude the influence of other influencing factors as in Reference Examples 1 to 4, a test was carried out without changing the ventilation resistance of the filter without providing ventilation holes in the filter part.

  The storage environment of the filter was carried out at a temperature of 22 ° C. and a humidity of 60% as in Reference Examples 1 to 4, and the storage period of the filter was not implemented (indicated as 0 W) for 2 weeks (2 W and 2 W). Notation) The test was conducted for 5 weeks (indicated as 5W) and stored for a maximum of 2 months (indicated as 2M), and the percentage released as the amount of menthol in smoke from the amount of menthol added in the filter is indicated as a percentage. Comparison was made at different release rates. Here, we did not implement storage in the cigarette packaging form, but only investigated the effects of filter storage by changing only the storage period of the filter, but by further implementing storage in the cigarette packaging form, the release rate It is expected from the above Reference Examples 1 to 4 that it is further reduced. Therefore, in this test, the menthol was not scented into the tobacco rod part, and the menthol was released only from the filter part. The test was carried out in the same procedure as in Examples 1 and 2 and Comparative Examples 1 and 2 except for the amount of menthol added to the chopping / filter, the ventilation ratio, and the storage period of the filter. The test results are shown in Table 7 and FIG.

  As apparent from Table 7 and FIG. 2, it can be seen that the greater the amount of menthol aroma added to the filter, the more stable the release rate with time change, compared to Reference Examples 5 and 6, Reference Example 7, 8 can be said to have a strong resistance to change over time. This is because the effect of menthol sorption can be reduced by adding a larger amount of menthol than the amount of menthol that is absorbed by the tow. This effect is assumed to be more effective because the amount of menthol itself sorbed on the tow can be reduced when a filter with a lower ventilation resistance is used than in Reference Examples 5 to 8. . From the above results, it was demonstrated that the amount of menthol in the smoke becomes stable when the amount of menthol added in the filter is 8 mg or more in terms of the amount contained per one. A more preferable menthol flavoring amount in the filter is 10 mg or more, and more preferably 12 mg or more corresponding to the condition of Reference Example 8.

<Example 3 and Comparative Examples 3 and 4>
Examples 1 and 2 and Comparative Examples 1 and 2 are comparative tests in the case where the tar amount is 5 mg. However, it is verified that the present technology is effective even when the target is 1 mg which is a lower tar amount. Therefore, tests similar to Examples 1 and 2 and Comparative Examples 1 and 2 were performed at the test levels shown in Table 8. Similarly, sensory evaluation was also performed.

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

  From Table 9, Example 3 had the highest amount of menthol, and the highest result was obtained even when compared in terms of M / T ratio. Regarding the evaluation of how to feel menthol by sensory evaluation, in Example 3, a significantly high feeling of menthol was obtained. Similar to the evaluation of Examples 1 and 2 and Comparative Examples 1 and 2 performed earlier, Since the value of the menthol amount varies greatly, it is assumed that a significant difference has occurred. From the above, it was confirmed that the present technology is effective even in a very low tar amount range.

Claims (6)

A low tar menthol cigarette having a tobacco rod part and a filter part wound with chip paper and having a tar amount of 5 mg or less, wherein the filter part includes a single segment composed of cellulose acetate tow, The ventilation resistance of the filter part is 25 to 80 mmH ₂ O / 27 mm, the ventilation rate of air inflow from the ventilation hole drilled in the chip paper is 55% or more, and menthol is added to the filter part Has been a low tar menthol cigarette.   The low-tar menthol cigarette according to claim 1, wherein the amount of menthol added to the filter part is 8 mg / tube or more per low-tar menthol cigarette.   The low tar menthol cigarette according to claim 1 or 2, wherein the tobacco rod part or the filter part has a resistor.   The low tar menthol cigarette according to claim 3, wherein the resistor is a capsule or an orifice. The low tar menthol cigarette according to any one of claims 1 to 4, wherein a ventilation resistance of the filter portion is 25 to 50 mmH ₂ O / 27 mm, and a ventilation ratio of air inflow is 70% or more.   The low tar menthol cigarette according to any one of claims 1 to 5, wherein a circumference of the low tar menthol cigarette is 20.0 to 27.0 mm.

Images