Smoking article

FIELD: production of smoking articles generating aroma upon heating without burning.

SUBSTANCE: smoking article has hollow cylindrical part equipped with heat generating member placed at distal end part, mouth-piece arranged at proximate end part, and aroma generating member adjoining heat generating member within cylindrical part. Aroma generating member contains multiplicity of granules, each of said granules containing from 65% to 93% of non-porous inorganic filler material, from 1% to 3% of binder and from 6% to 32% of aromatic substance by weight of dry substance.

EFFECT: provision for constant amount of aroma at each inhalation.

11 cl, 7 dwg, 5 ex

 

The present invention relates to Smoking articles, and more specifically Smoking product that contains the element in the generation of aroma generating aroma when heated without burning.

There are various types of Smoking products for enjoying the aromas of tobacco and Smoking without burning tobacco leaves. Typical examples of Smoking products of this type, in which the aroma get when heated, produced by the element generating heat, located at the far end products are disclosed, for example, in Japanese patent application KOKAI No. 63-35468, Japanese patent application KOKAI No. 6-46818, Japanese patent No. 1681670, Japanese patent No. 3012253 and Japanese patent application KOKAI No. 2-84168. In these Smoking products between the element generating heat and a mouthpiece inserted granular or sheet element generation flavor. When heating element generating aroma of heat from the element generating heat aromatic components evaporate and are released.

As part of the generation of aroma proposed various molded materials, such as non-combustible porous material and fresh tobacco material. However, the porous material requires extra energy for evaporation or desorption of the absorbed inside of aromatic substances, and thus, it entails a negative decrease the effectiveness of COI is rhenium or thermal denaturalization aromatic substances. On the other hand, if the substrate used flammable material, such as tobacco material, it essentially is a combustion or thermal decomposition, and thus, the temperature regime is very unstable, which can have undesirable effect on the number of delivered aroma.

In addition, Smoking product above described type entails the basic problem, namely the number of generated aroma is easily changed depending on the state of the element generating heat. As part of the generation of heat is most commonly used fuel cell obtained by the use of coal as the main raw material. However, this fuel cell shows unstable behavior, in which the amount of generated heat reaches its maximum value during the period from ignition to half of the area, and the quantity of heat produced is decreased gradually disappearing over time. As a result, the amount released when heated aroma shows similar conduct, and, therefore, there is a significant difference between the maximum number and especially the number corresponding to the second half of the area. Thus, it should be noted that consumers experience when Smoking stress due to uneven and the change amount of smoke and aroma, that reduces the feeling of satisfaction.

On the other hand, in Japanese patent application KOKAI No. 5-277191 disclosed example Smoking products obtained by the lamination of the fuel cell together with the use of plate element composed of an element generating a fragrance in an amount corresponding to a predefined number of puffs, to ensure that the quality of the fragrance. However, due to the structure in which the fuel element and the element in the generation of aroma or in between the insulation material is sealed relative to each other, the temperature of the fuel cell is easily reduced, making it difficult to maintain combustion, giving a high probability that the product will turn off. In addition, because this product requires a match between the burning rate of the fuel element and the time of tightening, for consumers it is hard to be necessary by the intervals between puffs, which increases stress among consumers. In addition, the product design is complicated, thereby complicating the production process.

The present invention eliminates the above described disadvantages and relates to Smoking articles having a simple structure that provides fragrance in a constant amount with each puff, which can be enjoyed by the consumer, without the stress of sredstv the e uneven changes in the number of smoke and aroma while Smoking.

To achieve this objective, the present invention provides a Smoking article containing a hollow cylindrical element with element generating heat in the far end portion, a mouthpiece in the near end portion and element generation aroma adjacent to the element generating heat inside of the cylindrical element, the element generating the aroma contains many granules, each of which contains from 65 to 93 wt.% essentially non-porous inorganic material filler, from 1 to 3 wt.% binder and from 6 to 32 wt.% aromatic substances from dry weight (i.e. the number corresponds to materials that do not contain moisture).

In the present invention it is preferable that the inorganic filler material had a specific surface area according to BET of 3 m2/g or less, and consisted of calcium carbonate.

Preferably, the granules were filled with the most dense packing, the ratio of filled with granules length in the axial direction of the cylindrical member to the inner diameter of the cylindrical element ranged from 2 to 4, and the ratio of the inner diameter of the cylindrical element to a larger diameter ranged from 4 to 15. Pellets can be made in the form of beads, pellets or spheres.

In addition, in the present invention, preferably, with asousi agent included methylhydroxyethylcellulose.

In a preferred embodiment of the present invention, the item demonstrates the generation of heat conductivity of 1.0 W/m·To or less at room temperature. Preferably, the element of heat generation was made of a carbon material containing essentially non-porous inorganic material filler in an amount of from 15 to 65 wt.%, and inorganic material filler contained in the element generating heat, consisted of calcium carbonate having a specific surface area according to BET of 3 m2/year

In the Smoking article of the present invention, the mouthpiece may consist of a filter with a filtration efficiency of 20% or less or hollow filter.

The invention is illustrated in the drawings, where:

in Fig. 1 shows a schematic cross section showing a Smoking article according to a variant of the present invention;

in Fig. 2A and 2B are diagrams showing the results of DSC analysis, obtained by mixing aromatic substances and essentially non-porous inorganic filling material and subsequent mixing with a porous inorganic material filler;

in Fig. 3 is a graph showing the number of aromatic substances collected during each puff of the Smoking product of example 1, described below;

in Fig. 4 shows Gras is IR, showing the number of aromatic substances collected during each puff of the Smoking product of example 2, which will be described below;

in Fig. 5 shows a graph showing the amount of heat flowing from the element generating heat molded carbon element in the generation of flavor with each puff in the Smoking product of example 1; and

in Fig. 6 is a graph showing the number of aromatic substances collected during each puff in the Smoking product of comparative example 1.

Below the present invention will be described in detail.

A Smoking article according to the present invention is a Smoking product of the so-called non-combustible type, which does not burn element generating flavor and is equipped with an element in the generation of aroma, releasing aromatic component, when the element is heated by heat from the lighted element generating heat. Item generation aroma has a specific composition and is in a hollow cylindrical element. This cylindrical element has an element generating heat at the far end and the near end part is the mouthpiece.

In Fig. 1 shows schematically a cross section showing the structure of Smoking articles according to the variant of the present invention. The Smoking article 10, while the data in Fig. 1, includes a hollow cylindrical element 11, which is the main body Smoking products. Element generating heat 13 is located in the far end part of the cylindrical element 11, and near the end part of the cylindrical element 11 is a mouthpiece 17. Item generation aroma 15 of the present invention adjacent to the element generating heat 13 within the cylindrical element 11.

The cylindrical element 11 generally has a circular cylindrical shape and preferably made of a thermally resistant material, such as aluminum or stainless steel. In addition, to reduce the heat capacity of the cylindrical element 11, it is preferable to make the thickness is small, for example, from 0.03 to 0.1 mm Cylindrical element 11 may have an internal diameter of about 7 to 8 mm and a length of from about 80 to 120 mm, as in the case of conventional cigarettes. The entire outer surface of the cylindrical element 11 is usually wrapped insulating element 12 so that the cylindrical element, you can safely keep the fingers.

Item generation aroma of 15, used for Smoking articles of the present invention, consists of a set of granules, each of which contains from 65 to 93 wt.% essentially non-porous inorganic material filler, from 1 to 3 wt.% binder and from 6 to 32 wt.% the aroma of the economic substance of the dry matter.

Aromatic substance includes, for example, a substance which generates aerosol (alcohol, sugar, water), a substance that generates only flavor (menthol, caffeine, natural extract) when heated by heat from the burning element generating heat, and the tobacco, tobacco extract, and their mixture. As alcohol can be used, for example, glycerol, propylene glycol or a mixture.

Essentially non-porous inorganic material filler, which is one of the components of the element in the generation of aroma 15, preferably has a specific surface area according to BET of 3 m2/g or less.

The so-called porous material, which has a number of extremely small pores, for example, activated carbon, ceramics, such as balls of aluminum oxide and silicon dioxide, or molecular sieves, has the ability to capture inside other substances by adsorption or absorption. When trying to get the aroma released from Smoking articles, such as the product of the present invention, with high efficiency when heating is required not only thermal energy for evaporation of aromatic substances, but also requires additional thermal energy for desorption of aromatic substances from the pores, if this aromatic substance is retained in the pores of the substrate. This reduces the efficiency of evaporation, and easily induced thermal denaturalization, because the material is continuously heated in the pores. In the present invention the aromatic substance is only held in all the gaps formed between the granules of the substrate, consisting of essentially non-porous inorganic material filler. With this structure, it is possible to easily release the aroma of the element in the generation of aroma 15 by heating without causing the problems described above porous material.

Particularly preferably be used as essentially non-porous inorganic material of carrier granules of calcium carbonate with a specific surface area according to BET of 3 m2/g or less. It is possible to granular molded materials consisted of fresh tobacco material or substitute fresh plant material, extract and others; however, this material in many cases is caused by fire or thermal decomposition when heated, and therefore, the temperature regime becomes unstable. As a result, the number of delivered fragrance easily becomes unstable, and possibly due to the porosity arises the problem of thermal denaturalization of flavor.

As the binder contained in the item generation scent of the present invention can be used is cellulose, various types of cellulose derivatives, alginates, guar gum, xanthan resin, the resin beans carob and such. In particular, the use of methylhydroxyethylcellulose can improve the ability to save aromatic substances and to provide excellent aroma and taste. When the number of added binder increases the physical strength of the molded material, facilitating its handling. However, most of the binder in many cases have an adverse impact on the flavor if heated at a high temperature. Thus, while the material can be processed without any difficulty, the amount of added binder must be small, corresponding to a range from 1 to 3 wt.%.

Granules (molded or formed)that make up the element generating the scent of the present invention can be obtained by mixing essentially non-porous inorganic material filler, binder and aromatic substances in the above amounts and adding a suitable amount of water needed to generate the strength of binding of the binder. The mixture is then formed on the extruder, granulator, machine for the production of pellets or similar equipment with obtaining the specified size and shape. Thus, it is possible to obtain granules in the form of balls, tabla is OK areas or similar.

As shown in Fig. 1, between the heat-generating element 13 and the generation of aroma 15 is breathable, resistant to heating element 16 consisting of, for example, of wire mesh, so that the element generating the aroma of 15 is not contacted directly with the heat generator 13.

Element generating heat 13, located in the far end part of the cylindrical element 11 Smoking articles of the present invention, may be made of a carbon material such as coal. Carbon material can be obtained in the desired form on the extruder, granulator or the like. Preferably, the shape of the carbon material was represented by a circular cylinder. This element generating heat comprises a path for air flow through which outside air is introduced into the cylindrical element 11 through the element generating heat 13 when blowing through the mouthpiece, and put the air heated by the element generating heat 13 can pass through the path for the current of air created between the granules 151 item generation aroma of 15, giving the smoker the opportunity to enjoy generated so aromatic component. The path for the current of air can contain at least one groove made in the outer peripheral surface of the material forming ug is Eragny cylinder, along the longitudinal axis of the cylindrical element 11 or at least one through hole made through the material forming the carbon cylinder along the longitudinal axis of the cylindrical element 11. In Fig. 1 shows such a path for the current, namely the Central through hole 131 through the element generating heat 13 in its axial direction and multiple through holes (Fig. 1 shows the through holes 132 and 133)located around the through hole 131.

Not only the type and composition of the carbon material, but also the depth of each groove and the diameter of each through hole) and the number of paths for air flow in the element generating heat 13 affect combustion characteristics, such as the ignition element generating heat, the burning rate, combustion temperature and the amount of product produced during combustion. In particular, with regard to the characteristics of the time of ignition, it is necessary that the time of ignition was of a kind which does not assume feeling to the consumer significant differences from conventional cigarettes (within 1 sec). According to the present invention discovered that the carbon material can be achieved time of ignition within 1.5 sec., choosing such a composition of the carbon material, the conductivity of which is at room temperature (approximately the 22 about(C) is 1.0 W/m·or less. In addition, according to the present invention discovered that if the element generating heat produced from the composition of carbon materials, which contains essentially non-porous inorganic material filler in an amount of from 15 to 65 wt.% (the rest comes from coal, more coal is significantly reduced. Thus, it is possible to reduce the amount of product of combustion, in particular of carbon monoxide. At the same time, it is possible to reduce the degree of combustion, i.e. the number of puffs, and, consequently, it is possible to reduce the total amount of the combustion product. As essentially non-porous inorganic filling material particularly suitable calcium carbonate having a specific surface area according to BET of 3 m2/g or less. The heat produced during combustion element generating heat 13, heats the element generation aroma 15, located next to the generation of heat 13, and vaporizes it, releasing the fragrance.

Usually, an element generating heat 13 surround the heat resistant enclosing element 14, is placed and fixed it in the cylindrical element 11.

The cylindrical element 11 can be provided to the element 18, which tells the fragrance lower on the move from item generation aroma of 15. Item 18 reporting fragrance, can convey different types of flavors or the like,if the flavor needs additional feature by adding other flavors to the aromatic component, obtained from item generation aroma of 15, or if it is preferable that the different types of fragrances are not subjected to the high temperature. The element 18, which tells the aroma, can be made of tobacco or reconstituted tobacco, or paper, which transmits the aroma, or media, such as non-woven fiber, depending on the purpose. In addition, it is possible to provide the element 18, which tells the scent, in the form of a molded material having a scent.

The mouthpiece 17 may be provided with a filter 171 for tobacco, which is usually used in this product. With regard to the amount of the released aroma, for the effective delivery of fragrance in an amount which, ultimately, can smoke a smoker, you can use a filter with a low efficiency filter having efficiency filtration 20% or less, or hollow filter. You can also do a lot of ventilation holes (VH) in the mouthpiece 17 through the insulating element 12 and the cylindrical element 11 in the desired position (usually in the peripheral direction of the mouthpiece 17) in accordance with the need to regulate the intake quantity and the suction pressure.

In the present invention it is possible to element the generation of aroma 15 and the element 18, which tells the aroma, were located in direct contact with each other; however, site is preferably to provide between these elements, the intermediate part 19, as shown in Fig. 1. In some cases, the intermediate part 19 serves to facilitate the cooling of the aerosol or aroma generated by the element in the generation of aroma, thereby reducing losses due to condensation aerosol or scent in the element 18, which tells the aroma, and the mouthpiece 17. The volume of the intermediate part 19 can be set arbitrarily in accordance with the task. If provided, the intermediate part 19, which is described above or below in the course of the item generation aroma 15 place breathable element 16b, similar breathable element 16A to the granules 151 did not move.

In the present invention it is preferable that the granules 151 were in the cylindrical element 11 in the form most dense packaging. If granules 151 to post freely in the cylindrical element, they are unevenly distributed in this element and, therefore, formed between the granules 151 current path becomes uneven, thus deteriorating the uniformity of the quantity delivered aroma. For this reason, it is preferable that the pellets were cylindrical element with the highest packing density, so that it was possible to maintain the initial state of the population. The most dense packaging means the state in which the element densely granulomatosis vibration or tapping and other

It was found that it is preferable to set the length field (L) granules 151 when the most dense packing and the inner diameter (D) of the cylindrical element 11 so that the ratio between them (L/D) ranged from 2 to 4. If this ratio is less than 2, then there is a tendency that the generation mode of the aromatic component element in the generation of aroma 15 easily influenced by the nature of the heat generation element generating heat 13. On the other hand, if this ratio is greater than 4, then there is a tendency that the number of delivered fragrance easily reduced as a result of condensation and decomposition of this component in the item generation aroma of 15. Thus, there is a tendency of deteriorating the uniformity of delivery of the fragrance. Therefore, if the internal diameter of the cylindrical element 11 is about 7 to 8 mm, as in the case of conventional cigarettes, the length field (L) is preferably set in the range of from about 14 to 32 mm. in Addition, also found that the size of the granules 151 is preferably set such that the ratio of their larger diameter (d) and inner diameter (D) of the cylindrical element 11 (D/d) ranged from 3.5 to 16, or more preferably from 4 to 15. If this ratio is less than 4, increases the heat capacity of the granule 151, and therefore, there is a tendency of decreasing the number is of fragrance, delivered at the initial stage area. On the other hand, if the ratio is greater than 15, it increases the resistance to absorption and, consequently, the absorption is complicated. Thus, if the internal diameter (D) of the cylindrical element 11 is approximately 7 to 8 mm, as in the case of conventional cigarettes, the greater the diameter of the granules 151 preferably should be in the range of from about 2.0 to 0.5 mm Larger diameter of the granules is defined as the largest diameter in the axial direction or the radial direction.

Below the present invention will be described by presenting a valid examples; however, this invention is not limited to the following examples.

Experimental example 1

In Fig. 2A and Fig. 2B shows the results of DSC analysis for the case when the porous inorganic material filler is used, the calcium carbonate having a specific surface area by BET 1 m2/g, and mix it with aromatic substance (Fig. 2A), and the case when the porous inorganic filling material using alumina having a specific surface area of 120 m2/g, and mix it with the same aromatic substance with the same value (Fig. 2B). When using non-porous inorganic filling material, endothermic the IR in the evaporation of the aromatic substances appears only once, as shown in Fig. 2A. On the other hand, when using a porous inorganic material filler, one endothermic peak (endothermic peak (1)) and another endothermic peak (endothermic peak (2)) appear in the region of higher temperatures, as shown in Fig. 2B. The results show that for the evaporation of the aromatic substances adsorbed in a porous material requires more energy. Thus, from these results it can be understood that the use of non-porous material is a lot more profitable.

Example 1

Smoking product having the structure shown in Fig. 1, is produced by the following description.

<a Hollow cylindrical element>

Material: paper, laminated aluminum foil.

Length: 85 mm

Inner diameter (D): 7.5 mm

<Item generation aroma>

Composition: 80 wt.% calcium carbonate having a specific surface area by BET 1 m2/g; 1 wt.% methylhydroxyethylcellulose; 19% of the mass. glycerin (aromatic substance).

Shape: spherical

Larger diameter (d): 1.5 mm

The length of the filling at the dense packing (L): 15 mm

L/D=2

D/d=5

<Element informing the aroma>

Ingredients: chopped tobacco is subjected to thermal drying.

Length: 20 mm

<a Mouthpiece>

Filter

Length: 20 mm

<Element generating heat>

p> Composition: 85% coal; 15% of the mass. calcium carbonate having a specific surface area by BET 1 m2/year

<the intermediate part>

Length: 15 mm

Thus obtained Smoking article is smoked using automatic Smoking machine so that the puff volume is 50 ml/2 sec with intervals of 30 seconds. In Fig. 3 shows the results of measuring the amount of aromatic substances collected during each puff. In addition, the index of evenness (explained below) in respect of the release of the aromatic component to this variant Smoking products 0.79. The total number of collected aromatics is about 11 mg.

Example 2

Smoking product similar to the product of example 1, except that the length of the fill at the dense packing of the granules that make up the element in the generation of aroma, set 30 mm (L/D = 4; the intermediate part is missing) and a larger diameter pellets install 1.0 mm (D/d = 7.5 mm). Thus obtained Smoking article is smoked using automatic Smoking machine so that the puff volume is 50 ml/2 sec with intervals of 30 seconds. In Fig. 4 shows the results of measuring the amount of aromatic substances collected during each puff. In addition, a measure of the uniformity of Smoking products on the frame of the example is 0.81. However, when a large prescribed value of the ratio L/D of the total number collected aromatics lower than in the previous example, and is about 7 mg.

A measure of the uniformity of each example described above, calculated on the basis of the following equations from measured values for 2-11 puffs.

Figure uniformity=1 - (coefficient of variation)

Coefficient of variation = (standard deviation)/ (average value)

The measure of uniformity indicates the best condition, the closer the value to 1.

In Fig. 5 shows the results for each tightening register the amount of heat flowing from the formed carbon element generating heat to the element generating the aroma in the Smoking product of example 1. The reason for setting the range for estimating the uniformity from 2 to 11 tightening is that they satisfy the conditions, when the amount of heat flowing to the element generating the aroma is 50% or more of its maximum value (which, as a rule, you can get at the 5th finger).

Example 3

Smoking product similar to the product of example 1 except that the content of calcium carbonate in the element generating heat set 40 wt.%, and thus obtained product is subjected to a similar crack PR is the process. The results show that the amount of carbon monoxide is reduced to 55% of the value of example 1.

Comparative example 1

When the element generation aroma unstable to heat and has such a property or a form that is highly flammable filled state changes due to combustion, and the amount of fragrance rises sharply under the influence of heat of combustion. Therefore, his character becomes even more unstable than the nature of heat generation by element generating heat. In this case, the material that creates the flavor, prepared from the cut sheet of the environment derived from the pulp and material on tobacco basis, as disclosed in Japanese patent application KOKAI No. 6-46818, and aromatic substances (e.g., glycerol), contained in the environment in the amount of 40 wt.%, and the length of the filling is about 30 mm, Thus producing a Smoking product similar to the product of example 2. In Fig. 6 shows the results of measuring the amount of aromatic substances collected during each puff. The total number of collected aromatic material is about 13 mg, which is not much different from the number of the example 1, though the measure of uniformity is 0.31. In addition, Smoking product after Smoking disassemble and research is so I found that some of the chopped leaves were burned and destroyed by burning.

Example 4

Tobacco products of examples 1 and 2, and the Smoking product of comparative example 1 smokes a trained expert taste area and compares them with each other. The evaluation results show that tobacco products of examples 1 and 2 of the present invention have a stable number flavored smoke with each puff, and the amount of fragrance is not reduced in the second half of the area, giving thus the opportunity to support a good amount of smoke even at a late stage area. In contrast, the results related to the Smoking product of comparative example 1 show that at a late stage area marked by specific changes of taste, which is caused by the burning element in the generation of aroma.

As described above, according to the present invention proposed a Smoking product that can with a simple structure to deliver a steady amount of fragrance on tightening when Smoking the consumer, thereby giving the consumer the opportunity to enjoy Smoking without experiencing stress due to uneven changes in the number of smoke or fragrance.

1. Smoking article containing a hollow cylindrical element with element generating heat in the far is Onaway part, the mouthpiece in the near end portion and element generation aroma adjacent to the element generating heat inside of the cylindrical element, the element generating the aroma contains many granules, each of which contains from 65 to 93 wt.% essentially non-porous inorganic material filler, from 1 to 3 wt.% binder and from 6 to 32 wt.% aromatic substances from the dry mass.

2. Smoking product of claim 1, wherein the inorganic filler material has a specific surface area according to BET of 3 m2/g or less.

3. A Smoking article according to claim 2, in which an inorganic material filler is a calcium carbonate.

4. A Smoking article according to claim 1, in which the filling granules are able to more dense packing, the ratio of the length of the fill granules cylindrical element in its axial direction to the inner diameter of the cylindrical element is from 2 to 4, and the ratio of the inner diameter of the cylindrical element to a larger diameter is from 4 to 15.

5. A Smoking article according to claim 1, in which the pellets are made in the form of beads, pellets or spheres.

6. A Smoking article according to claim 1, in which the element generating heat contains methylhydroxyethylcellulose.

7. A Smoking article according to claim 1, in which the binder is diploproa is of 1.0 W/m· To or less at room temperature.

8. A Smoking article according to claim 1, in which the element of heat generation is made of a carbon material containing essentially non-porous inorganic material filler in an amount of from 15 to 65 wt.%.

9. Smoking product of claim 1, wherein the inorganic filler material contained in the element generating heat comprises calcium carbonate having a specific surface area according to BET of 3 m2/g or less.

10. A Smoking article according to claim 1, in which the mouthpiece consists of a filter having efficiency filtration 20% or less.

11. Smoking product of claim 1, wherein the mouthpiece comprises a hollow filter.



 

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