WO2011122567A1 - Oral tobacco material - Google Patents

Abstract

The disclosed oral tobacco material contains: powdered tobacco; and an acid salt of phosphoric acid and a basic salt of carbonic acid as pH adjustors. The acid salt of phosphoric acid and the basic salt of carbonic acid are contained in quantities that total at least 6 wt.% of the dry weight of the powdered tobacco, and are formulated in a manner so that the initial pH of the oral tobacco material becomes 7-8.5; the aforementioned oral tobacco material contains at least 15 wt.% moisture content.

Description

Oral tobacco material

The present invention relates to an oral tobacco material, and more particularly to an oral tobacco material excellent in pH stability when stored at room temperature.

In recent years, oral tobacco products such as moist-snuff or snus have attracted attention. In these oral tobacco products, oral tobacco materials including wet powdered tobacco are contained in a moisture-permeable pouch and inserted between the lips and gums in the oral cavity to enjoy the taste and aroma of powdered tobacco.

Such a wet powder tobacco generally shows weak acidity (pH of about 4.0 to 6.0), and bacteria are likely to grow. Therefore, in order to suppress the growth of bacteria and increase the storage stability, a pH adjuster is added to the powdered tobacco, and the pH is adjusted from a substantially neutral to an alkaline pH. Moreover, in order to give a desirable flavor, the pH is adjusted to one desired pH in a substantially neutral to alkaline region. From the viewpoint of maintaining the quality of the product, it is desired that the adjusted pH is substantially maintained over the entire storage period.

Patent Document 1 discloses using an alkali metal hydroxide, metal carbonate, or metal bicarbonate as a pH adjuster or buffer. However, any of these pH adjusting agents or buffering agents is an alkaline substance. Patent Document 1 also discloses blending an inorganic filler into powdered tobacco, and calcium phosphate is described as an example, but calcium phosphate is a substance that exhibits alkalinity.

Patent Document 2 discloses a tobacco product containing magnesium carbonate as a pH adjuster for making a tobacco material alkaline. However, magnesium carbonate is a substance showing alkalinity. Further, Patent Document 2 discloses that an additional pH adjusting agent can be used in addition to magnesium carbonate, and sodium carbonate, phosphate and the like are described as examples. However, this additional pH adjuster has been used to quickly bring the tobacco material to the desired pH value (neutral or alkaline), and therefore the described phosphate is said to be alkaline.

The amount of alkaline material required to bring wet powdered tobacco to the desired neutral or alkaline pH value is uniquely determined. In addition, the amount of alkaline material used to bring the powdered tobacco to the desired pH value is relatively small, and thus the adjusted pH value cannot be maintained over a long period of time. Therefore, oral tobacco materials including powdered tobacco whose initial pH is adjusted using only an alkaline substance must be stored not at room temperature but at a low temperature (−20 ° C. to 10 ° C.).

In addition, when a large amount of an alkaline substance is added to the oral tobacco material in order to maintain the storage stability for a long period of time, the pH value is greatly increased, and the mucous membrane may be damaged if inserted into the oral cavity. It is desirable that the oral tobacco material including wet powder tobacco inserted into the oral cavity has a pH of 8.5 or less.

Special table 2009-508523 International Publication WO2009 / 082331

An object of the present invention is to provide an oral tobacco material that exhibits excellent storage stability over a long period of time at room temperature.

According to the present invention, there is provided an oral tobacco material comprising powdered tobacco and a basic salt of carbonic acid and an acidic salt of phosphoric acid as a pH adjuster, and the basic salt of carbonic acid and the acidic salt of phosphoric acid in total It is included in an amount of 6% by weight or more of the dry weight of the powdered tobacco, and is formulated so that the initial pH of the oral tobacco material is 7 to 8.5, and the oral tobacco material has a moisture content of 15% by weight or more. An oral tobacco material is provided.

The oral tobacco material of the present invention contains a relatively large amount of a pH adjusting agent, and thus exhibits excellent storage stability over a long period of time at room temperature.

6 is a graph showing changes in pH over time when the oral tobacco materials of Examples 1 and 2 and Comparative Example 1 described later are stored in an atmosphere at a temperature of 25 ° C. and a relative humidity of 60%. 6 is a graph showing changes in pH over time when the oral tobacco materials of Examples 1 and 2 and Comparative Example 1 described later are stored in an atmosphere at a temperature of 35 ° C. and a relative humidity of 60%. It is a graph which shows the time-dependent change of pH when the oral tobacco material of Example 3 and the comparative example 2 mentioned later is preserve | saved in the atmosphere of temperature 25 degreeC and 60% of relative humidity. It is a graph which shows the time-dependent change of pH when the oral tobacco material of Example 4 and the comparative example 3 mentioned later is preserve | saved in the atmosphere of temperature 25 degreeC and relative humidity 60%.

Hereinafter, various aspects of the present invention will be described in detail.

The oral tobacco material of the present invention contains powdered tobacco, and a basic salt of carbonic acid and an acidic salt of phosphoric acid as a pH adjuster. The basic salt of carbonic acid and the acidic salt of phosphoric acid are contained in a total amount of 6% by weight or more of the dry weight of the powdered tobacco, and the initial pH of the oral tobacco material is 7 to 8.5. Blended. The oral tobacco material has a moisture content of 15% by weight or more. The initial pH represents the pH when adjusted with a pH adjuster.

The powdered tobacco contained in the oral tobacco material includes tobacco deboned leaf powder, a mixture of tobacco deboned leaf powder and tobacco middle bone powder, reconstituted tobacco powder, reconstituted tobacco powder and tobacco deboned Contains a mixture with leaf powder. Examples of tobacco varieties include Burley tobacco, yellow tobacco, Orient tobacco, dark cure tobacco, and Rustica tobacco.

The pH adjuster contained in the oral tobacco material is a combination of a basic salt of carbonic acid and an acidic salt of phosphoric acid. The basic salt of carbonic acid is preferably selected from the group consisting of sodium carbonate and potassium carbonate. Mixtures of these basic carbonate salts can also be used. The acidic salt of phosphoric acid is preferably selected from the group consisting of sodium dihydrogen phosphate and potassium dihydrogen phosphate. Mixtures of these phosphoric acid salts can also be used.

The basic salt of carbonic acid and the acidic salt of phosphoric acid are contained in a proportion such that the initial pH of the oral tobacco material is 7 to 8.5, and in total 6% by weight or more of the dry weight of the powdered tobacco It is. If the pH value is less than 7, it is difficult to suppress the growth of bacteria. On the other hand, if the pH value exceeds 8.5, the oral mucosa may be damaged. If the total amount of the basic salt of carbonic acid and the acidic salt of phosphoric acid is less than 6% by weight, long-term storage at room temperature (15 ° C. to 35 ° C.) may be deteriorated. As described above, powdered tobacco exhibits a pH value of about 4.0 to 6.0. In the present invention, the pH value of the oral tobacco material is adjusted to 7 to 8.5 using both an acidic substance (acidic salt of phosphoric acid) and a basic substance (basic salt of carbonic acid). Therefore, even if a large amount of basic substance (basic salt of carbonic acid) is added so that the pH of the oral tobacco material greatly exceeds 8.5, the pH can be adjusted to 7 to 8.5 by the acidic substance. Therefore, when the pH value of the oral tobacco material is adjusted to one desired value with only the alkaline substance, the amount of the alkaline substance is uniquely determined, whereas in the present invention, the pH value of the oral tobacco material is adjusted. When adjusting to one desired pH value, the usage amount of an acidic substance (acidic salt of phosphoric acid) and a basic substance (basic salt of carbonic acid) can be significantly changed. The acid salt of phosphoric acid is preferably used in an amount of 1% by weight or more based on the dry weight of the powdered tobacco. The acid salt of phosphoric acid is usually used in an amount of 10% by weight or less of the dry weight of the powdered tobacco. The use amount of the basic salt of carbonic acid corresponding to the use amount of the acidic salt of phosphoric acid is determined by the initial pH value 7 to 8.5 of the oral tobacco material.

In the present invention, the moisture content of the oral tobacco material is 15% by weight or more. The pH adjuster used in the present invention can have the desired effect on the oral tobacco material having a water content of 15% by weight or more. The moisture content of the oral tobacco material is usually 50% by weight or less.

The oral tobacco material of the present invention may contain additives such as flavoring agents and wetting agents.

As flavoring agents, menthol, mint, amino acids (glycine, etc.), plant extracts (eucalyptus, rosemary, GSE), flavonoids, vitamin E, vitamin C, monosaccharides such as citric acid, salt, fructose, and disaccharides such as sucrose , Oligosaccharides, other polysaccharides, cinnamon, horseradish, pepper, salmon, cloves, ginger, turmeric, allspice, cardamom and other spices, basil, bay leaves, mabola, oregano, rosemary, sage , Tarragon, thyme, sesame, garlic, onion and other herb spices, caraway, anise lade, celery seed, coriander, cumin seed, dill seed, finnell, mace, nutmeg, poppy seed and other seed spices, chocolate, citrus And other fruit flavors, vanillin, ethyl vanillin, bergamot oil, linalool, lemon oil, and the like. The flavoring agent can be used in an amount of 1% to 5% by weight of the dry weight of the powdered tobacco.

Examples of the wetting agent include polyhydric alcohols such as glycerin and propylene glycol, sugar alcohols such as erythritol, xylitol, and sorbitol, hyaluronic acid, and the like. The wetting agent can be used in an amount of 1% to 5% by weight of the dry weight of the powdered tobacco.

In order to prepare the oral tobacco material of the present invention, first, the moisture content of the powdered tobacco itself as a raw material is measured. The moisture content can be measured using a commercially available heat drying moisture meter (for example, MX-50 manufactured by A & D Co., Ltd.). Next, the amount of water necessary to make the moisture content of the oral tobacco material 15% by weight or more is calculated. The required amount of water Z can be calculated by the formula: Z = {X × (1−a / 100) + Y} ÷ (1−b / 100) − (X + Y). Here, X is the weight of the raw powdered tobacco, a is the moisture content (%) of the raw powdered tobacco, Y is the total weight of additive substances such as pH adjusters and wetting agents, and b is the target oral tobacco. It is the moisture content (%) of the material. Add the specified amount of basic carbonate carbonate and acid salt of phosphoric acid, and if necessary, water-soluble additives to the amount of water calculated in this way, and add the total amount of the resulting aqueous solution to the powdered tobacco of weight X can do. Other additives can be incorporated into the resulting wet powdered tobacco. The oral tobacco material of the present invention typically does not contain magnesium carbonate.

The oral tobacco material of the present invention is contained in a water-permeable pouch known per se to provide an oral tobacco product.

The oral tobacco material of the present invention can substantially maintain the initial pH value adjusted with the pH adjuster of the present invention for at least 6 months even at room temperature (15 ° C. to 35 ° C.) It is excellent.

Next, the present invention will be described with reference to examples, but the present invention is not limited to these examples.

Examples 1 and 2, Comparative Example 1
Raw material powder cigarettes containing 25% by weight, 25% by weight, and 50% by weight of each powder of rustica, dark-cured tobacco and tobacco bone as raw materials were prepared, and the moisture content was measured by the following method. .

The water content of 5.0 g of the raw powdered tobacco was measured at 80 ° C. using a heat drying moisture meter (MX-50 manufactured by A & D Co., Ltd.). As a result, the water content was 14.0% by weight. From the moisture content of the raw powdered tobacco, the amount of water required to adjust the final moisture content of the oral tobacco material to approximately 25% by weight was calculated, and the calculated amount of water was prepared.

In Example 1, the water prepared above corresponds to 4.8% by weight of sodium carbonate, 1.9% by weight of sodium dihydrogen phosphate, and 5.0% by weight of glycerin, respectively, of the dry weight of the raw powdered tobacco. A quantity of sodium carbonate, sodium dihydrogen phosphate and glycerin were added, and the total amount of the resulting aqueous solution was sprayed onto the raw powder tobacco. The final moisture content of the oral tobacco material thus obtained was 25.44% by weight, and the initial pH measured by the pH measurement method described later was 8.09.

In Example 2, an amount corresponding to 8.0% by weight of sodium carbonate, 4.1% by weight of sodium dihydrogen phosphate, and 5.0% by weight of glycerin of the dry weight of the powdered tobacco was added to the prepared water. An oral tobacco material was prepared in the same manner as in Example 1 except that sodium carbonate, sodium dihydrogen phosphate and glycerin were added. The final moisture content of the obtained oral tobacco material was 26.39% by weight, and the initial pH measured by the pH measurement method described later was 8.08.

In Comparative Example 1, Example 1 was added except that sodium carbonate and glycerin in an amount corresponding to 2.7% by weight of sodium carbonate and 5.0% by weight of glycerin were added to the prepared water. In the same manner as in No. 1, an oral tobacco material was prepared. The final moisture content of the obtained oral tobacco material was 26.53% by weight, and the initial pH measured by the pH measurement method described later was 8.11.

Examples 3 to 4 and Comparative Examples 2 to 3
Raw material powder cigarettes containing 35% by weight, 15% by weight, and 50% by weight of each powder of rustica, dark-cured tobacco and tobacco bone as raw materials were prepared, and the moisture content was measured by the following method. .

The water content of 5.0 g of the raw powdered tobacco was measured at 80 ° C. using a heat drying moisture meter (MX-50 manufactured by A & D Co., Ltd.). As a result, the water content was 12.7% by weight. From the moisture content of the raw powdered tobacco, the amount of water required to adjust the final moisture content of the oral tobacco material to approximately 15.0% or 25.0% by weight is calculated, and the calculated amount of water is calculated. Prepared.

In Example 3, the water required to adjust the final moisture content prepared to 25.0% by weight was added to 5.8% by weight of sodium carbonate, 4.1% by weight of phosphorus, respectively, of the dry weight of the raw powdered tobacco. An oral tobacco material was prepared in the same manner as in Example 1 except that sodium carbonate, sodium dihydrogen phosphate and glycerin in an amount corresponding to sodium dihydrogen acid and 5.0% by weight of glycerin were added. The final moisture content of the oral tobacco material thus obtained was 26.9% by weight, and the initial pH measured by the pH measurement method described later was 7.73.

In Example 4, 5.0% by weight of sodium carbonate, 4.1% by weight of diphosphoric acid phosphate was added to the water necessary for adjusting the final moisture content prepared above to 15.0% by weight. An oral tobacco material was prepared in the same manner as in Example 1 except that sodium carbonate, sodium dihydrogen phosphate and glycerin corresponding to sodium hydride and 5.0% by weight of glycerin were added. The final moisture content of the obtained oral tobacco material was 18.6% by weight, and the initial pH measured by the pH measurement method described later was 7.21.

In Comparative Example 2, the water necessary for adjusting the final moisture content prepared above to 25.0% by weight corresponds to 3.2% by weight of sodium carbonate and 5.0% by weight of glycerin of the dry weight of the powdered tobacco. An oral tobacco material was prepared in the same manner as in Example 1 except that sodium carbonate and glycerin were added. The final moisture content of the obtained oral tobacco material was 26.1% by weight, and the initial pH measured by the pH measurement method described later was 7.7.

In Comparative Example 4, the water required for adjusting the final moisture content prepared above to 15.0% by weight corresponds to 3.2% by weight sodium carbonate and 5.0% by weight glycerin of the dry weight of the powdered tobacco. An oral tobacco material was prepared in the same manner as in Example 1 except that sodium carbonate and glycerin were added. The final moisture content of the obtained oral tobacco material was 18.1% by weight, and the initial pH measured by the pH measurement method described later was 7.12.

Some information on the oral tobacco materials of Examples 1-4 and Comparative Examples 1-3 above is listed in Table 1 below.

Each of the oral tobacco materials obtained in Examples 1 and 2 and Comparative Example 1 was put in a storage pack (produced by Japan, Lamidip AL-4; moisture-proof, gas-blocking, and light-blocking container). It was stored for 6 months in an atmosphere of a temperature of 25 ° C. and a relative humidity of 60% and in an atmosphere of a temperature of 35 ° C. and a relative humidity of 60%. During the storage period, the pH was measured periodically by the pH measurement method described later. The results are shown in FIG. 1 and FIG. FIG. 1 shows the results of storage in an atmosphere at a temperature of 25 ° C. and a relative humidity of 60%, and FIG. 2 shows the results of storage in an atmosphere of a temperature of 35 ° C. and a relative humidity of 60%. In FIG. 1 and FIG. 2, a line segment a relates to Example 1, a line segment b relates to Example 2, and a line segment c relates to Comparative Example 1. As is clear from the results shown in FIGS. 1 and 2, the oral tobacco material of Comparative Example 1 has a pH of about 0.5 when stored for 6 months in an atmosphere at a temperature of 25 ° C. and a relative humidity of 60%. When stored for 6 months in an atmosphere of 35 ° C. and a relative humidity of 60%, the pH value decreases by about 1.0, whereas the oral tobacco materials of Examples 1 and 2 have a pH value under any storage condition. It turns out that it hardly decreases.

The oral tobacco materials obtained in Examples 3 to 4 and Comparative Examples 2 to 3 were put in the above-mentioned storage packs (produced by Japan Lamidip AL-4), respectively, and the atmosphere at a temperature of 25 ° C. and a relative humidity of 60%. Stored for 6 months below. During the storage period, the pH was measured periodically by the pH measurement method described later. The results are shown in FIG. 3 and FIG. In FIG. 3, the line segment d relates to Example 3, and the line segment e relates to Comparative Example 2. In FIG. 4, the line segment f relates to Example 4, and the line segment g relates to Comparative Example 3. As is clear from the results shown in FIGS. 3 and 4, the oral tobacco material of Comparative Example 2 has a pH of about 1.2 when stored for 6 months in an atmosphere at a temperature of 25 ° C. and a relative humidity of 60%. On the other hand, in the oral tobacco material of Example 3, the decrease in pH value during storage under the same conditions is about 0.6, indicating that the decrease in pH during storage is suppressed. The oral tobacco material of Comparative Example 3 has a pH of about 0.4 when stored for 6 months in an atmosphere at a temperature of 25 ° C. and a relative humidity of 60%. The decrease in pH value during storage under conditions is about 0.25, indicating that the decrease in pH during storage is suppressed.

<Measurement method of pH>
2.0 g of oral tobacco material was weighed into a vial, 20 mL of distilled water was added, and the mixture was subjected to an extraction process that was shaken at 200 rpm for 10 minutes. After leaving for 5 minutes, the pH of the extract was measured using a pH meter (IQ Scientific Instruments, Inc. IQ240).

Claims (5)

A powder tobacco, and an oral tobacco material containing a basic salt of carbonic acid and an acidic salt of phosphoric acid as a pH adjuster, wherein the basic salt of carbonic acid and the acidic salt of phosphoric acid are the total dry weight of the powdered tobacco The oral tobacco material is contained so that the initial pH of the oral tobacco material is 7 to 8.5, and the oral tobacco material has a moisture content of 15% by weight or more. The oral tobacco material according to claim 1, wherein the basic salt of carbonic acid is selected from the group consisting of sodium carbonate and potassium carbonate. The oral tobacco material according to claim 1 or 2, wherein the acidic salt of phosphoric acid is selected from the group consisting of sodium dihydrogen phosphate and potassium dihydrogen phosphate. The oral tobacco material according to any one of claims 1 to 3, wherein the oral tobacco material contains the acid salt of phosphoric acid in an amount of at least 1% by weight of the dry weight of the powdered tobacco. The oral tobacco material according to any one of claims 1 to 4, wherein the oral tobacco material does not contain magnesium carbonate.

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