JP4224459B2 - Tobacco filter - Google Patents

Description

  The present invention relates to a tobacco filter that can reduce the amount of aldehydes in mainstream tobacco smoke.

  When smoking cigarettes, various chemical components exist in mainstream smoke sucked by smokers. Among these chemical components, aldehydes typified by formaldehyde are difficult to adsorb and remove with ordinary cigarette filters. For this reason, it is desired to remove aldehydes from tobacco mainstream smoke.

  Conventionally, in order to adsorb and remove aldehydes in mainstream cigarette smoke, attempts have been made to add various additives to a filter or the like.

  However, when conventional additives are used, there is a problem that the taste of tobacco becomes worse.

  An object of the present invention is to provide a cigarette filter that has little influence such as deteriorating the taste of cigarettes and that can effectively reduce aldehydes in mainstream cigarette smoke.

  The tobacco filter according to one embodiment of the present invention includes a basic amino acid or a basic amino acid salt and a humectant.

  In the present invention, the basic amino acid or basic amino acid salt is selected from the group consisting of arginine, arginine salt, lysine, lysine salt, histidine, histidine salt, ornithine, ornithine salt, citrulline, citrulline salt, hydroxyzine, hydroxyzine salt. Selected. In the present invention, the humectant is selected from the group consisting of glycerin, sodium propionate, and sodium lactate.

  In the cigarette filter of the present invention, the basic amino acid or the basic amino acid salt is preferably contained in an amount of 3.5 mg or more.

  In the tobacco filter of the present invention, the ratio of the basic amino acid or basic amino acid salt to the humectant is preferably in the range of 1: 1 to 1: 2.

  If the tobacco filter of the present invention is used, aldehydes in tobacco mainstream smoke can be effectively reduced.

  As a result of studying additives for reducing aldehydes in tobacco mainstream smoke from various viewpoints, the present inventors have found that basic amino acids or basic amino acid salts are effective. The basic amino acid or basic amino acid salt is selected from the group consisting of arginine, arginine salt, lysine, lysine salt, histidine, histidine salt, ornithine, ornithine salt, citrulline, citrulline salt, hydroxyzine, hydroxyzine salt, for example. Things are used. Of these, arginine and its salts are recognized as food additives.

  In addition, the present inventors have found that aldehydes in tobacco mainstream smoke can be more effectively reduced when a basic amino acid or a basic amino acid salt and a humectant are used in combination. As the humectant, those selected from the group consisting of glycerin, sodium propionate, and sodium lactate are used.

  As the support (filter material) of the basic amino acid or basic amino acid salt and the moisturizing agent, a normal filter medium such as acetate tow, paper, pulp non-woven fabric and the like can be used.

  In the cigarette filter according to the present invention, it is considered that aldehydes in cigarette mainstream smoke are reduced by the following mechanism. First, aldehydes in cigarette mainstream smoke are dissolved in water held in a moisturizing agent supported on a filter. Furthermore, the aldehydes dissolved in water react with the basic amino acid or basic amino acid salt carried on the filter and are captured in the filter. The humectant has an action of stably holding water that dissolves aldehydes.

  In the cigarette filter of the present invention, the basic amino acid or basic amino acid salt content is set to 3.5 mg or more because if it is less than this amount, the effect of reducing aldehydes cannot be obtained sufficiently.

  In the cigarette filter of the present invention, the ratio of the basic amino acid or basic amino acid salt to the humectant is set in the range of 1: 1 to 1: 2. This is because it is difficult to obtain.

  In order to contain a basic amino acid or basic amino acid salt and a humectant in the filter material, methods such as spray spraying, dipping, and roller transfer can be used.

  In addition to the basic amino acid or basic amino acid salt and the humectant, the filter material may contain activated carbon in combination.

  The filter chip can be plain, dual, triple or more multi-segment, plug-space-plug, etc., and basic amino acids or basic amino acid salts and humectants can be added to some or all segments in the filter chip. It can be included.

  The filter for tobacco of the present invention may be a filter attached to the suction side of the cigarette part of the cigarette, or may be a filter in the form of a smoking jig such as a cigarette holder.

  The method for measuring aldehydes in cigarette mainstream smoke employed in the following examples uses 2,4-dinitrophenylhydrazine (DNPH) as a collecting substance, and the produced derivative is measured by high performance liquid chromatography (HPLC). To do. The target substances that can be measured simultaneously by this method are eight components of formaldehyde, acetaldehyde, acetone, acrolein, propionaldehyde, crotonaldehyde, methyl ethyl ketone and n-butyraldehyde. In the following, examples of formaldehyde will be described among aldehydes (carbonyl compounds) that are substances to be measured.

  First, 9.51 g of 2,4-dinitrophenylhydrazine (DNPH) was dissolved in 1 L of acetonitrile, 5.6 mL of 60% perchloric acid was added, and the volume was made up to 2 L with ultrapure water to prepare a collection solution.

  The outline of the measuring apparatus will be described with reference to FIG. As shown in FIG. 1, a DNPH collection liquid 12 is put into a collection air washing bottle 11. The capacity of the washing bottle 11 was 250 mL, the amount of the DNPH collection liquid 12 was 100 mL, and the dead volume was 150 mL. The air bottle 11 is placed in an ice water bath 13 and cooled with ice. The lower end of the glass tube 14 to which the cigarette 1 is attached is immersed in the collected liquid 12 in the air cleaning bottle 11. A glass tube 15 and a Cambridge pad (Cambridge pad) 16 are attached so as to communicate with the dead volume of the air cleaning bottle 11, and the Cambridge pad 16 and the automatic smoker 17 are connected.

  The cigarette 1 is attached to the glass tube 14, and the cigarette 1 is automatically smoked under standard smoking conditions conforming to ISO. That is, for each cigarette, the operation of sucking 35 mL of smoke for 2 seconds with one empty puff is repeated at intervals of 58 seconds. While the mainstream smoke is bubbled, the carbonyl compound 8 component is derivatized with DNPH. Two cigarettes for measurement were used.

  The derivative produced as described above is measured by HPLC. First, the collected liquid is filtered and then diluted with the Trizma Base liquid (collected liquid 4 mL: Trizma Base liquid 6 mL). This solution is measured by HPLC. The HPLC measurement conditions are as follows.

Column: HP LiChrospher 100RP-18 (5μ) 250 x 4mm
Guard column: HP LiChrospher 100RP-18 (5μ) 4 x 4mm
Column temperature: 30 ° C
Detection wavelength: DAD 356 nm
Injection volume: 20 μL
Mobile phase: gradient by three phases (liquid A: ultrapure water aqueous solution containing 30% acetonitrile, 10% tetrahydrofuran and 1% IPA, liquid B: ultrapure water aqueous solution containing 65% acetonitrile, 1% tetrahydrofuran and 1% IPA, C liquid: acetonitrile 100%).

  The structure of a cigarette used as a sample will be described with reference to the cross-sectional view of FIG. As shown in FIG. 2, this cigarette is a cigarette portion 20 in which a cigarette notch 21 is wound with a wrapping paper 22 and a filter portion 30 in which a filter 31 is wound with a forming paper 32 are attached by a chip paper 40. is there. As the filter material, for example, cellulose acetate fiber tow can be used.

  When a cigarette using a test filter to which a basic amino acid or a basic amino acid salt and a humectant were added was used for the test, the cigarette part was cut out from the cigarette of 6 mg of commercially available tar and the cigarette part was taken out and tested. A sample was prepared by connecting to a filter for use. An atomizer was used to add a basic amino acid or a basic amino acid salt and a humectant to the test filter.

Test 1
An acetate filter having a length of 25 mm was prepared as a base filter. In addition, a reference test filter was prepared in which 6.5 mg of water was contained in the base filter. Further, a test filter was prepared in which 6.5 mg of water and 3.5 mg of additive were contained in the base filter. As the additive, L-arginine, arginine-glutamate, formic hydrazide, ammonia, acetamide, or urea, which is a nitrogen-containing basic substance, was used.

  Each filter was connected to the above-mentioned cigarette part, and the amount of formaldehyde outflow (μg / cig) in the mainstream smoke per cigarette was measured according to the measurement method described above. The result is shown in FIG. From FIG. 3, L-arginine, which is a basic amino acid, and arginine-glutamate, which is a basic amino acid salt, are particularly effective as additives that can reduce the amount of formaldehyde efflux compared to the case where only water is contained in the base filter. I understand that.

  In order to reduce the amount of formaldehyde efflux, it has been found that the content of L-arginine and arginine-glutamate in the filter is preferably 3.5 mg or more.

Test 2
The base filter contained 3.5 mg of L-arginine, and the content of water was variously changed. Thus, the filter from which content of water differs was connected with said tobacco part, and the formaldehyde outflow amount (microgram / cig) in mainstream smoke was measured according to the measuring method mentioned above. The result is shown in FIG. FIG. 4 shows that when the L-arginine content in the filter is 3.5 mg, the formaldehyde in the mainstream smoke can be effectively reduced if the water content is 5 mg or more.

Test 3
The base filter was allowed to contain L-arginine and glycerin as a humectant, and the amount of water increase in the filter was examined. The content of L-arginine was 3.5 mg, 7.0 mg or 10.5 mg. The glycerin content was 18 mg or 52 mg. The result is shown in FIG. FIG. 5 shows that the amount of water that can be retained in the filter can be increased according to the content of the humectant (glycerin).

Test 4
A reference test filter was prepared in which only 3.5 mg of L-arginine was contained in the base filter and no humectant was added. In addition, a test filter containing 3.5 mg of L-arginine and various humectants in a base filter was prepared. As the humectant, glycerin, xylitol, sodium pantothenate, sodium PCA, sodium lactate, sodium propionate, DL-sodium malate, D-mannose, or calcium chloride was used.

  Each filter was connected to the above-mentioned cigarette part, and the amount of formaldehyde outflow (μg / cig) in the mainstream smoke per cigarette was measured according to the measurement method described above. The result is shown in FIG. FIG. 6 shows that glycerin, sodium lactate, and sodium propionate are more effective as a moisturizer that can reduce the amount of formaldehyde efflux than when only L-arginine is contained in the base filter. In addition, these humectants also have a filter manufacturing process validity.

Test 5
Test filters were prepared in which L-arginine (3.5 mg) and sodium lactate as a humectant were added to the base filter in various ratios relative to L-arginine. At this time, the ratio of L-arginine to sodium lactate was 1: 1, 1: 2, or 1: 3.

  Each filter was connected to the above-mentioned cigarette part, and the amount of formaldehyde outflow (μg / cig) in the mainstream smoke per cigarette was measured according to the measurement method described above. The result is shown in FIG. From FIG. 7, it can be seen that by containing L-arginine and sodium lactate in a ratio of 1: 1 or 1: 2 in the base filter, formaldehyde in the mainstream smoke can be effectively reduced.

FIG. 1 is a view showing an apparatus for measuring formaldehyde in cigarette mainstream smoke used in an embodiment of the present invention. FIG. 2 is a sectional view of a cigarette according to an embodiment of the present invention. FIG. 3 is a diagram showing the outflow amount of formaldehyde by various basic substances added to the filter. FIG. 4 is a diagram showing the relationship between the amount of water added together with L-arginine into the filter and the amount of formaldehyde effluent. FIG. 5 is a graph showing the relationship between the amount of glycerin added together with L-arginine in the filter and the amount of water increase in the filter. FIG. 6 is a view showing the amount of formaldehyde efflux by various humectants added together with L-arginine in the filter. FIG. 7 is a graph showing the relationship between the ratio of L-arginine and glycerin added to the filter and the amount of formaldehyde efflux.

Claims (1)

Arginine, arginine salt, lysine, lysine salt, histidine, histidine salt, ornithine, ornithine salt, citrulline, citrulline salt, hydroxyzine and hydroxyzine salt selected from the group consisting of glycerin, A humectant selected from the group consisting of sodium propionate and sodium lactate , wherein the basic amino acid or basic amino acid salt content is 3.5 mg to 10.5 mg, and the basic amino acid or basic A cigarette filter , wherein the ratio of the amino acid salt to the humectant is in the range of 1: 1 to 1: 2 .

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