WO2010084792A1 - Cigarette - Google Patents

Abstract

Disclosed is a cigarette comprising a tobacco rod in which a tobacco filler is contained. The tobacco filler contains midrib-removed tobacco leaf strips and also contains a carboxylic acid metal salt selected from a group consisting of a lactic acid metal salt, a tartaric acid metal salt, a succinic acid metal salt, a 3-hydroxybutyric acid metal salt, an acetic acid metal salt and a formic acid metal salt in an amount of 0.5 to 6.0% by weight relative to the weight of the midrib-removed tobacco leaf strips.

Description

cigarette

The present invention relates to a cigarette in which the amount of benzo [a] pyrene in mainstream smoke generated when smoking is reduced.

Benzene [a] pyrene in mainstream smoke generated when smoking cigarettes is a substance that is desired to be removed or reduced.

Many technologies for reducing the amount of benzo [a] pyrene in cigarette mainstream smoke have been reported so far. Among them, the technology for reducing the amount of additives by adding additives to tobacco is a simple and practical technology. One. For example, International Publication No. WO 2004/110185, US Pat. No. 4,248,251 and US Pat. No. 4,055,191 add a palladium metal or a palladium salt as a main additive to tobacco, and polycyclic aromatic carbonization such as benzopyrene in cigarette mainstream smoke. Disclosing the amount of hydrogen (PAHs or PCAHs) is disclosed.

However, since palladium is an expensive noble metal like platinum and gold, it is disadvantageous in terms of cost. Palladium is also known as one of the precious metals with small reserves. On the other hand, due to its high catalytic function, there is a great demand in the automobile and semiconductor industries, which is disadvantageous in terms of procurement.

On the other hand, carboxylic acid metal salts are conventionally used with the intention of reducing the amount of carbon monoxide in cigarette mainstream smoke. For example, US Pat. No. 4,489,739 discloses a tobacco composition containing an alkali metal salt of a carboxylic acid in an amount of 6.5 to 20% to reduce the amount of carbon monoxide generated. Japanese Laid-Open Patent Publication No. 2006-187260 discloses blending organic alkali metal salts and inorganic alkali metal salts in specific amounts in tobacco in order to reduce the amount of carbon monoxide in mainstream tobacco smoke. .

However, a technique for reducing the amount of benzo [a] pyrene in cigarette mainstream smoke using an alkali metal carboxylate has not been found in the prior art.

An object of the present invention is to provide a cigarette in which the amount of benzo [a] pyrene in mainstream smoke generated when smoking is reduced.

As a result of intensive studies on effective substances for reducing the amount of benzo [a] pyrene in cigarette mainstream smoke, the present inventors have found that metals such as lactic acid, tartaric acid, succinic acid, 3-hydroxybutyric acid, acetic acid, and formic acid. It has been found that salt selectively reduces the amount of benzo [a] pyrene in cigarette mainstream smoke.

According to the present invention, a cigarette comprising a tobacco rod comprising a tobacco filler, the tobacco filler comprising tobacco deboned leaves, and a lactic acid metal salt, a tartaric acid metal salt, a succinic acid metal salt, 3- There is provided a cigarette comprising a carboxylic acid metal salt selected from the group consisting of metal hydroxybutyrate, metal acetate and metal formate in an amount of 0.5 to 6.0% by weight of the weight of the tobacco deboned leaves. The

The carboxylic acid metal salt used in the present invention can selectively reduce benzo [a] pyrene in cigarette mainstream smoke. Moreover, since the carboxylic acid metal salt used for this invention is generally cheaper than palladium, the cigarette which generate | occur | produces the mainstream smoke which benzo [a] pyrene reduced can be provided more cheaply.

FIG. 1 is an enlarged perspective view schematically showing a cigarette according to one aspect of the present invention.

Hereinafter, the present invention will be described in more detail.

The cigarette of the present invention includes a tobacco rod including a tobacco filler. The tobacco filler includes tobacco deboning and includes a metal carboxylate to reduce the amount of benzo [a] pyrene in cigarette mainstream smoke. In general, tobacco fillers used in cigarettes include tobacco deboned (carved tobacco), tobacco medium, reclaimed tobacco or mixtures thereof. Tobacco deboning may or may not be swollen. In the present invention, the tobacco filler comprises a metal carboxylate in a specific percentage with respect to the weight of tobacco deboned leaves with a relatively high generation of benzo [a] pyrene. Note that the swollen tobacco chopped tobacco is a tobacco slice obtained by expanding a dried and contracted tissue of tobacco leaf with a swelling agent such as carbon dioxide.

The carboxylic acid metal salt used in the present invention is selected from the group consisting of a lactic acid metal salt, a tartaric acid metal salt, a succinic acid metal salt, a 3-hydroxybutyric acid metal salt, an acetic acid metal salt and a formic acid metal salt. The carboxylic acid metal salt is preferably an alkali metal salt, particularly preferably a potassium salt or a sodium salt.

The metal carboxylate used in the present invention is included in the tobacco filler in an amount of 0.5 to 6.0% by weight based on the weight of tobacco deboned leaves. When the amount of the carboxylic acid metal salt is less than 0.5% by weight, there is a tendency that benzo [a] pyrene cannot be significantly reduced. Carboxylic acid metal salts are sufficiently effective in amounts up to 6.0% by weight. However, even if the metal carboxylate is added in an amount exceeding 6% by weight of tobacco deboning, the benzopyrene reduction effect is not significantly increased compared to the case of adding 6.0% by weight. There is a tendency that the savory taste of this is lowered, which is not preferable. More preferably, the metal carboxylate is added in an amount of 2 to 6.0% by weight of the weight of tobacco deboned leaves.

As described above, the tobacco filler used in the present invention includes puffed and / or non-puffed tobacco deboned cuts (tobacco cuts of mesophyll), and further includes a cigarette medium cut, regenerated tobacco cut or those thereof. Any mixture may be included. That is, the tobacco filler may comprise or consist of non-expanded tobacco deboned leaves, or may comprise or consist of expanded puffed tobacco deboned, non-puffed tobacco deboned and puffed tobacco deboned leaves A mixture of non-expanded tobacco deboned leaves and tobacco midbone and / or regenerated tobacco cuts, or a mixture of swollen tobacco deboned and tobacco midbones and And / or may comprise a mixture of reclaimed tobacco or may comprise or consist of a mixture of non-expanded tobacco deboned and swollen tobacco deboned and tobacco medium bone and / or reclaimed tobacco obtain. If the tobacco filler contains tobacco material other than tobacco deboned leaves, such as medium bone, reclaimed tobacco or mixtures thereof, tobacco deboned leaves are usually Can account for 70% or more of the weight of the tobacco filler. Tobacco varieties used include yellow and Burley varieties.

When the tobacco filler is a mixture of tobacco deboned and other tobacco materials (eg, tobacco midbone and / or reclaimed tobacco), a metal carboxylate is added to the tobacco deboned leaves. It can be added in advance and mixed with other tobacco materials. For example, if the tobacco filler is a blended tobacco comprised of yellow and / or Burley non-expanded tobacco deboned leaves, swollen tobacco deboned leaves and tobacco mid-bone cuts, The above carboxylic acid metal salt is mixed in a quantity of 0.5 to 6.0% by weight, preferably 2 to 6% by weight of the total weight of the swollen deboned leaves, and a mixture of the non-swollen and swollen deboned leaves It is preferable to add the tobacco chopping and / or regenerated tobacco chopping to the mixture obtained in advance. Thereby, the reduction effect of benzo [a] pyrene is further improved. In this case, it is not necessary to add a carboxylic acid metal salt in advance to the bone of tobacco. Furthermore, in the present invention, tobacco deboning, tobacco fine powder, binder, aerosol-generating substance, etc. are mixed in a solvent to form a slurry, which is then made into paper and rolled into a tobacco sheet. It can be used as a material. In this case, the carboxylic acid metal salt is added to the tobacco sheet in an amount of 0.5 to 6.0% by weight, preferably 2 to 6% by weight, based on the weight of the tobacco deboning used.

A fragrance | flavor may be added to the tobacco filler, for example, menthol can be added.

The carboxylic acid metal salt can be included in the tobacco filler by any suitable technique. For example, an aqueous solution of a metal carboxylate can be sprayed onto tobacco deboning. Tobacco filler containing tobacco deboned leaves added with metal carboxylate is conditioned and then used for producing cigarettes. The cigarette of the present invention can be produced by an ordinary method for producing cigarettes, except that the tobacco filler containing the carboxylic acid metal salt is used as the tobacco filler.

The tobacco filler containing the carboxylic acid metal salt of the present invention is wound into a rod shape (usually a cylindrical shape) by cigarette paper. As the cigarette wrapping paper, any cigarette wrapping paper based on pulp such as flax pulp used in ordinary cigarettes can be used. Cigarette paper can contain generally used fillers such as carbonates such as calcium carbonate and potassium carbonate, and hydroxides such as calcium hydroxide and magnesium hydroxide at a rate of ² g / m ² or more. The filler can be contained in the cigarette paper at a rate of 2 to 8 g / m ² . Cigarette wrapping paper usually has a basis weight of 22 g / m ² or more. This basis weight is usually 80 g / m ² or less. The inherent air permeability of the wrapping paper is usually 10 to 60 cholesterol units.

In addition, a combustion regulator such as citric acid or a salt thereof (sodium salt, potassium salt) can be added to the cigarette paper. Usually, when using this, a combustion regulator is used in the cigarette paper at a ratio of 2% by weight or less.

The present invention may have the same structure and appearance as a normal cigarette.

FIG. 1 is a perspective view schematically showing an enlarged cigarette according to one embodiment of the present invention. In FIG. 1, the cigarette is not enlarged in a certain proportion.

The cigarette 10 shown in FIG. 1 includes a cigarette rod 12 including a cigarette rod (cylindrical rod in FIG. 1) 121 including a cigarette filler containing the metal carboxylate of the present invention, and a cigarette wrapping paper 122 around which the cigarette is wound. Is provided. The cigarette rod 12 typically has a circumferential length of 17 mm to 26 mm and a length of 49 mm to 90 mm. A normal cigarette filter 16 can be attached to the base end (that is, the downstream end in the smoke absorption direction) 12 a of the cigarette rod 12 with the tip paper 14. The tip paper 14 can be provided with ventilation holes (not shown) in the circumferential direction of the cigarette in order to take in external air and dilute the mainstream smoke of the cigarette.

The cigarette of the present invention can selectively reduce benzo [a] pyrene in mainstream smoke.

Hereinafter, the present invention will be described in more detail with reference to examples.

Examples 1 to 5
In these Examples, carboxylic acid alkali metal salts shown in Table 1 were used as the carboxylic acid metal salt, and yellow tobacco deboned leaves were used as the tobacco filler.

2.5 g of the alkali metal carboxylate shown in Table 1 was dissolved in 20 mL of ultrapure water, and the solution was sprayed onto 50 g of deboned tobacco leaves. Thus, an alkali metal carboxylate was added to the tobacco deboned leaves in an amount of 5% of the weight of the tobacco deboned leaves. The tobacco deboned leaves added with the alkali metal carboxylate were conditioned for 48 hours or more in a conditioned room at a room temperature of 22 ° C. and a relative humidity of 60%. A cigarette rod was produced by hand using tobacco deboned leaves after humidity control and ordinary cigarette wrapping paper. The amount of tobacco cut with the addition of the alkali metal carboxylate used per cigarette rod was 735 mg, the length of the cigarette rod was 57 mm, and the circumferential length of the cigarette rod was 25 mm. A cigarette filter (27 mm in length) having cellulose acetate tow as a filter material was attached to one end of each of these cigarette rods with a tip paper having ventilation holes, to obtain cigarettes.

Comparative Example 1
Cigarettes were prepared in the same manner using 700 mg of the same yellow-type tobacco deboned leaves as used in Examples 1 to 5 except that the carboxylic acid alkali metal salt was not added.

Examples 6 to 10
In these examples, carboxylic acid alkali metal salts shown in Table 2 were used as carboxylic acid metal salts.

2.5 g of the alkali metal carboxylate shown in Table 2 was dissolved in 20 mL of ultrapure water, and the solution was sprayed onto 50 g of depigmented flesh of yellow tobacco. Thus, the metal carboxylate was added to the tobacco cut in an amount of 5% of the weight of the tobacco deboned leaf cut. The tobacco cut to which the alkali metal carboxylate was added was conditioned in the same manner as in Examples 1-5. Cigarettes were produced in the same manner as in Examples 1 to 5 except that the humidity-controlled time was used.

Comparative Example 2
Cigarettes were prepared in the same manner using 700 mg of the same type of yellow tobacco deboned leaves used in Examples 6 to 10 except that the alkali metal carboxylate was not added.

<Measurement of cigarette puff frequency and analysis of tar, nicotine and benzo [a] pyrene in cigarette mainstream smoke>
A. Collection of particulate matter in cigarette mainstream smoke and measurement of puff frequency Cellulose acetate tow was removed from the cigarette filters prepared in Examples 1 to 10 and Comparative Examples 1 and 2, and the ventilation holes of the chip paper were closed with adhesive tape Then, it used for the following operation.

Cigarettes were smoked with a 10-line linear smoker (SM410 manufactured by Cerulean) equipped with a particulate matter collector equipped with a Cambridge filter (weighed in advance), and particulate matter was collected on the Cambridge filter. The cigarette per puff had a puff time of 2 seconds, a puff volume of 35 mL, and a puff interval of 60 seconds. The cigarette was burned for a length of 49 mm from the tip of the cigarette, the number of cigarette puffs was measured, and the average value thereof was calculated. The results are shown in Tables 1 and 2.

B. Analysis of tar and nicotine The weight of the Cambridge filter that collected the particulate matter was measured, and the weight of the Cambridge filter that had been measured in advance was subtracted from the weight to calculate the total weight of the particulate matter.

10 mL of isopropanol (containing quinoline and ethanol as an internal standard for analysis) was added to the Cambridge filter that collected the particulate matter to extract the particulate matter. With respect to the extract, the amount of water and nicotine was quantified by an internal standard method using GC-FID / TCD (Agilent 6890N). The amount of tar was calculated by subtracting the weight of water and nicotine obtained from the total weight of the particulate material.

C. Analysis of Benzo [a] pyrene Benzo [a] pyrene was analyzed by the gas chromatograph mass spectrometry (GC-MS) method described below for Examples 1 to 10 and Comparative Examples 1 and 2, and the examples described below. 11 to 16 and Comparative Examples 3 to 4 were analyzed using the high performance liquid chromatography (HPLC) method described below.

C-1: GC-MS Method An isopropanol extract of a granular material was obtained in the same manner as in the above tar and nicotine analysis. An internal standard solution (benzo [a] pyrene-deuterated methanol solution) and 14 mL of ultrapure water were added to 6 mL of the extract to prepare a test solution. This test solution was loaded onto a CH column (Varian MEGA BE-CH, 1GM 6ML). The column was dried and eluted with 5 mL cyclohexane. The eluate was loaded onto a Si column (Sep-Pak Vac 3 cc (500 mg) manufactured by Silica Cartridge, Waters) and eluted with 5 mL of a dichloromethane / cyclohexane (1/4) mixed solvent. The eluate was concentrated and quantified by GC-MS (Agilent 6890N) by an internal standard method.

C-2: HPLC method Cyclohexane was added to the Cambridge filter in which the particulate matter was collected so that the concentration of the particulate matter was about 1 mg / mL, and the mixture was extracted by shaking for 30 minutes. The extract was filtered through a 0.45 μm membrane filter, and 8 mL of the filtrate was collected using a glass syringe connected to a solid phase extraction cartridge (Waters Sep-Pak NH2 plus) and collected through the cartridge. . The used cartridge was washed with 7 mL of hexane, and the washing was combined with the collected filtrate. The combined solution was dried, redissolved in 1 mL of acetonitrile, and subjected to quantitative analysis of benzo [a] pyrene by an absolute calibration method using HPLC-FLD (series 1000, HEWLETT PACKARD). .

The results of these analyzes are shown in Tables 1 and 2.

As is clear from Table 1, the amount of benzo [a] pyrene per cigarette of Examples 1 to 5 was reduced by 15% to 27% compared to the cigarette of Comparative Example 1. Further, as shown in Table 2, the cigarettes of Examples 6 to 10 decreased the amount of benzo [a] pyrene by 12 to 23%, compared with the cigarette of Comparative Example 2, although the number of puffs increased. In any of the results of Tables 1 and 2, the amounts of tar and nicotine are hardly changed. Thus, these results indicate that the carboxylic acid metal salt used in the present invention selectively reduces the amount of benzo [a] pyrene in cigarette mainstream smoke.

Examples 11 to 16
In these examples, the addition amount of potassium lactate (weight percentage relative to the weight of tobacco deboned leaves; hereinafter simply referred to as “addition amount”) was examined.

As the tobacco filler, blended tobacco A and B composed of yellow and Burley non-expanded deboned bone carved, swollen deboned tobacco carved and middle bone were prepared. In blended tobacco A and B, the type of tobacco and the blending ratio are different. In preparing these blended tobaccos, an aqueous solution of potassium lactate was sprayed with a spray nozzle while stirring 10 kg of a mixture of non-expanded chopped and swelled chopped with a mixer. After spraying, the mixture was dried with a large dryer, blended with bones to prepare blended tobacco. Table 3 shows the amount of potassium lactate added to tobacco deboned leaves (non-swollen deboned leaves + swollen deboned leaves).

The tobacco blend A or B prepared as described above was used in the amounts shown in Table 3 (amount per cigarette), a normal wrapping paper was used as a cigarette wrapping paper, a cellulose acetate filter was used as a filter, and a normal chip paper was used. Using the chip paper, a cigarette rod with a filter was produced by a cigarette making machine. The length of each cigarette rod was 57 mm, the circumferential length of the cigarette rod was 25 mm, and the length of the filter was 27 mm.

Comparative Examples 3 and 4
Cigarettes were prepared in the same manner as in Examples 11 to 16, using blended tobacco A and B, to which potassium lactate was not added, in the amounts shown in Table 3, respectively.

For the cigarettes produced in Examples 11 to 16 and Comparative Examples 3 to 4,
In the same manner as described above, the number of cigarette puffs, the amount of tar and nicotine in cigarette mainstream smoke were measured, and the amount of benzo [a] pyrene was measured by HPLC. The results are shown in Tables 4 and 5.

As can be seen from Tables 4 and 5, it was confirmed that the amount of benzo [a] pyrene was reduced in all Examples. However, depending on the type of blended tobacco, there was a difference in the benzo [a] pyrene reduction effect when the amount of potassium lactate added was low. In Examples 11 to 13 examined using the blended tobacco A, a reduction rate of benzo [a] pyrene amount of 17% was obtained even when the addition amount of potassium lactate was 0.5%. On the other hand, in Examples 14 to 16 examined using the blended tobacco B, when the amount of potassium lactate added was as low as 1.1%, the reduction rate of the amount of benzo [a] pyrene was low. This result suggests that the effect of potassium lactate may vary depending on the raw materials used and the blending ratio.

From the above results, it is considered that the addition amount of potassium lactate that exhibits the effect of reducing benzo [a] pyrene is required to be about 0.5 to 6%. However, since it is assumed that the reduction effect due to the addition varies depending on the raw material of blended tobacco and the blending ratio thereof, the addition amount is more preferably 2 to 6%.

Claims (11)

A cigarette comprising a tobacco rod containing a tobacco filler, the tobacco filler comprising tobacco deboning and lactic acid metal salt, metal tartrate, metal succinate, metal 3-hydroxybutyrate, acetic acid A cigarette comprising a carboxylic acid metal salt selected from the group consisting of a metal salt and a metal formate in an amount of 0.5 to 6.0% by weight based on the weight of the tobacco deboned leaves. The cigarette according to claim 1, wherein the tobacco rod is wound with cigarette wrapping paper. The cigarette according to claim 2, wherein the metal carboxylate is an alkali metal salt. The cigarette according to claim 3, wherein the alkali metal salt is a sodium salt or a potassium salt. The cigarette according to any one of claims 1 to 4, wherein the tobacco filler contains the metal carboxylate in an amount of 2 to 6% by weight of the weight of the tobacco deboned leaves. The cigarette according to claim 2, wherein the tobacco deboned leaves include a mixture of non-expanded tobacco deboned leaves and swollen tobacco deboned leaves. The cigarette according to claim 6, wherein the tobacco filler comprises a blend of non-expanded tobacco deboned, engraved tobacco deboned, tobacco mid-bone and / or reclaimed tobacco. The cigarette according to claim 7, wherein the carboxylic acid metal salt is added to the non-expanded tobacco deboned leaves and the expanded tobacco deboned leaves. The metal salt of carboxylic acid is 2-6% by weight of the total weight of the non-swollen tobacco deboned leaves and the swollen tobacco deboned leaves. The cigarette according to claim 8, which is added to the cigarette. The cigarette according to any one of claims 6 to 9, wherein the carboxylic acid metal salt is an alkali metal salt. The cigarette according to claim 10, wherein the alkali metal salt is a sodium salt or a potassium salt.

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