WO2003056949A1

WO2003056949A1 - Smoking implement

Info

Publication number: WO2003056949A1
Application number: PCT/JP2002/013232
Authority: WO
Inventors: Manabu Takeuchi; Atsushi Mikita; Hajime Ohinata
Original assignee: Japan Tobacco Inc.
Priority date: 2001-12-28
Filing date: 2002-12-18
Publication date: 2003-07-17
Also published as: EP1468618B1; RU2004123208A; DE60227562D1; US20040226568A1; CN1607911A; ATE400192T1; JP3974898B2; TWI226821B; PT1468618E; CA2471732A1; EP1468618A1; CN1286409C; RU2268631C2; EP1468618A4; DK1468618T3; KR100587849B1; JPWO2003056949A1; KR20040066928A; AU2002357599A1; TW200301086A

Abstract

A smoking implement (10), comprising a tubular body (11) having a heating body (13) fitted to a tip part and a puffing part (17) provided at a rear end part and a flavor generating body (15) installed in the tubular body (11) closely to the heating body (13), the flavor generating body (15) further comprising a plurality of particulate matters (151) having, on dry mass basis, 65 to 93 wt.% substantially nonporous inorganic filler material, 1 to 3 wt.% binder, and 6 to 32 wt.% flavor substance.

Description

Specification

Smoking articles

Technical field

The present invention relates to a smoking article, and more specifically, to a smoking article provided with a flavor generator that generates a flavor by heating without burning.

Background art

Smoking articles for enjoying the flavor and smoke of tobacco without burning the tobacco leaves are already known, and various types of smoking articles have been proposed. For example, Japanese Unexamined Patent Application Publication No. Sho 63-3354648, Japanese Unexamined Patent Application Publication No. Hei 6-46818, Patent No. 1 168 170, Patent No. 301 253 Japanese Unexamined Patent Application Publication No. 2-84161 discloses a typical example of a type of smoking article that generates a flavor by utilizing heat generated by a heat generating member attached to the tip. Have been. In these smoking articles, for example, a granular or sheet-like flavor generator is filled between the heating member and the mouthpiece, and when the flavor generator is heated by the heat of the heating member, the flavor component is vaporized and released. I do.

Various molded products such as nonflammable porous substances and tobacco raw materials have been proposed as flavor generators. However, porous materials require excessive energy to vaporize or desorb the flavor substances adsorbed inside them, which may result in lower vaporization efficiency and thermal denaturation of the flavor substances. There is. In addition, when a combustible substance such as tobacco is used as a base material, combustion or thermal decomposition occurs substantially, so that the thermal behavior becomes very unstable, which is preferable for the amount of flavor to be delivered. This may have an adverse effect. In addition, there is a fundamental problem with this type of smoking article in that the amount of flavor generated is easily affected by the heat generation condition of the heat generating member. Fuel elements molded from carbon as the main raw material are most commonly used as heat-generating members.However, usually, the maximum heating value is reached between the time of ignition and the first half of smoking. Exhibits uneven behavior such that the calorific value gradually decreases and fire extinguishes. As a result, the amount of flavor produced by this heat shows the same behavior, and there is a considerable difference between the maximum amount and the amount especially in the latter half of smoking. Therefore, it has been pointed out that the user experiences stress during smoking due to uneven changes in the amount of smoke and taste, and the satisfaction is reduced.

On the other hand, Japanese Patent Application Laid-Open No. Hei 5-277191 discloses that a fuel member and a flavor generator for a predetermined number of puffs are formed into a plate shape in order to enable the delivery of flavor of a constant quality. Examples of smoking articles stuck together are disclosed. However, since the fuel member and the flavor generator or the insulating inclusion are attached to each other, there is a high possibility that the temperature of the fuel member will decrease and the combustion will not be sustained and will extinguish. Since it is constantly heated, there is a possibility that quality deterioration may easily occur due to unnecessary heating. In addition, it is necessary to match the burning speed of the fuel member with the timing of smoking, so that not only the user cannot take a smoking interval according to his / her preference but also the stress may be increased. However, the structure is complicated and the production is considered to be extremely difficult.

The present invention has been made in view of the above-mentioned problems, and has a simple structure, and sends out a stable amount of flavor per puff during smoking of a user, thereby reducing the amount of smoke and the like. Feel the stress due to uneven changes in taste The purpose is to provide a smoking article that allows people to enjoy smoking easily.

Disclosure of the invention

In order to solve the above-mentioned problems, according to the present invention, a heat generating body is provided at a front end portion, and a tubular body provided with a suction port at a rear end portion; The flavor generator is provided with 65 to 93 masses of a substantially non-porous inorganic filler on a dry mass basis (that is, a ratio in a state without water). A smoking article is provided comprising a plurality of particulates, each comprising a binder in a proportion of 1-3% by weight and a flavoring substance in a proportion of 6-32% by weight.

In the present invention, the inorganic filler preferably has a BET specific surface area of 3 m ² Zg or less, and preferably consists of calcium carbonate.

The granular material is packed in a close-packed state, and the ratio of the filling length of the granular material in the axial direction of the cylindrical body to the inner diameter of the cylindrical body is in the range of 2 to 4, and the inner diameter of the cylindrical body and the granular It is preferable that the ratio to the representative diameter of the object is 4 to 15. Granules can be in the form of pellets, tablets or spheres.

Further, in the present invention, it is preferable that the binding agent contains methyl hydroxysethyl senorelose.

In a preferred embodiment of the present invention, the heating element has a thermal conductivity of 1.OWZm, K or less at room temperature. The heating element is preferably made of a carbonaceous material containing a substantially non-porous inorganic filler in a proportion of 15 to 65% by mass, and the inorganic heating substance contained in the heating element is preferably used. It is preferable that the filler is a carbonic acid or calcium hydroxide having a BET specific surface area of 3 m ² ng or less.

In the smoking article of the present invention, the mouthpiece can be constituted by a fret having a filtration rate of 20% or less or a hollow fret.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic sectional view showing a smoking article according to one embodiment of the present invention;

FIGS. 2A and 2B show the DSC analysis when a substantially non-porous inorganic filler was used as the inorganic filler, and when the porous inorganic filler was used, the mixture was mixed with a flavor substance. A graph showing the results;

FIG. 3 is a graph showing the amount of flavor substances collected per puff for the smoking article of Example 1 described in detail below;

Figure 4 is a graph showing the amount of flavoring substance collected per puff for the smoking article of Example 2 described in detail below;

FIG. 5 is a graph in which the amount of heat flowing into the flavor generator from the carbon molded article heating element in the smoking article of Example 1 is plotted for each puff;

FIG. 6 is a graph showing the amount of flavor substances collected for each puff for the smoking article of Comparative Example 1.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in detail.

The smoking article of the present invention is a so-called non-combustion type smoking article which does not burn a flavor generator, A flavor generator having a flavor generator that emits a flavor component when heated by heat has a specific composition and is provided in a cylindrical body. A heating element is provided at the front end of the tubular body, and the rear end of the tubular body constitutes a suction roll.

FIG. 1 is a schematic sectional view showing an example of the configuration of the smoking article of the present invention. A smoking article 10 shown in FIG. 1 has a tubular body 11 constituting a smoking article main body. A heating element 13 is provided at the tip of the tubular body 11, and a rear end of the tubular body 11 constitutes a suction port 17. The flavor generator 15 of the present invention is provided in the cylindrical body 11 close to the heating element 13.

The cylindrical body 11 is usually cylindrical, and is preferably formed of a thermally stable material such as aluminum or stainless steel, and has a small heat capacity. In order to reduce the thickness, for example, 0.33 mn! It is preferred that the thickness be ~ 0.1 mm. The cylindrical body 11 can have a length of about 8 Om to 12 Om m with an inner diameter of about 7 to 8 mm, similar to a normal cigarette. The cylindrical body 11 is usually wound around the entire outside with a heat insulating material 12 so that it can be held by hand without any trouble.

The flavor generator 15 used in the smoking article of the present invention contains 65 to 93 mass% of a substantially non-porous inorganic filler and 1 to 1 mass of a binder on a dry mass basis. 3 mass. /. , And a plurality of granules containing flavor substances in a proportion of 6 to 32% by mass, respectively.

Flavoring substances are substances (alcohols) that are heated by the heat from an ignited heating element, thereby producing an aerosol. Foods, sugars, water), substances that produce only flavor (mensole, caffeine, natural extracts), tobacco, tobacco extracts, and mixtures thereof. As the alcohols, for example, dalyceline / propylene glycol, and mixtures thereof can be used. The substantially non-porous inorganic filler which is one of the components of the flavor generator 15 preferably has a BET specific surface area of 3 m ² / g or less.

Activated carbon, ceramics such as alumina beads and silica, and so-called polyporous materials having countless fine pores such as molecular sieves absorb or absorb other substances inside. There is a property to take in. In a smoking article such as the smoking article of the present invention, when flavor is to be efficiently released by heating, it is necessary for the flavor substance to evaporate if the flavor substance is incorporated into the pores of the base material. In addition to the heat energy required, additional heat energy for desorption from the pores is required, which not only lowers the vaporization efficiency but also causes thermal denaturation due to continued heating in the pores. The problem arises. In the present invention, since the flavor substance is only held in the interstices between the base particles made of the substantially non-porous inorganic filler, the heating is carried out without the above-mentioned problems with the porous substance. Is readily released from flavor generators.

As the substantially nonporous porous inorganic filler, it is particularly preferable to use calcium carbonate particles having a BET specific surface area of 3 m ² Zg or less. It is also possible to form granular molded products using tobacco raw materials or alternative plant raw materials and their extracts. However, due to heating, it causes combustion or thermal decomposition to a small extent, and the unstable thermal behavior tends to make the delivered flavor amount non-uniform, and it is porous. The problem of thermal denaturation of flavors can be caused as well.

As the binder contained in the flavor generator of the present invention, cellulose or various cellulose derivatives, alginic acids, guagam xanthan gum, locust bean gum and the like can be used. In particular, the use of methylhydroxyl cellulose improves the retention of flavoring substances and can provide good flavor. The larger the amount of binder added, the greater the physical strength of the molding and the easier it is to handle. However, most binders, when heated at high temperatures, often have an unfavorable effect on flavor, so that a small amount in the range of 1-3% by weight is acceptable unless handling is impaired. It is preferable that

The granular (molded) material constituting the flavor generator of the present invention is obtained by mixing the above substantially non-porous inorganic filler, a binder, and a flavoring substance in the above ratio, and then binding the binder. By adding an appropriate amount of water necessary for generating a force, it can be formed into a desired size and shape by an extruder, a granulator, a tableting machine, or the like. Granules can thus be formed into pellets, tablets, spheres or the like.

As shown in FIG. 1, air permeability such as a metal mesh is provided between the heating element 13 and the flavor generating element 15 so that the flavor generating element 15 does not come into direct contact with the heating element 13. A heat-resistant member 16a is provided. In the smoking article of the present invention, the smoking article is provided at the tip of the cylindrical body 11. The heating element 13 can be formed of a carbonaceous material such as carbon. The carbonaceous material can be formed into a desired shape by an extruder, a tableting machine, or the like. The shape of the carbonaceous molded body is preferably a columnar shape. The heating element introduces air into the cylindrical body 11 from the outside through the heating element 13 by suction and suction from the locus, and the introduced air heated by the heating element 13 In order to pass the air through the air flow passage between the particulate matter 15 1 of the flavor generator 15 and to taste the flavor component generated thereby, an air flow passage is provided. Such an air flow passage is provided in at least one groove provided in the outer peripheral surface of the carbonaceous cylindrical molded body along the longitudinal axis of the cylindrical body 11 or the longitudinal axis of the cylindrical body 11. Can be constituted by at least one through-hole penetrating the carbonaceous cylindrical molded body along the axis. In FIG. 1, such flow passages are provided around a central through-hole 131, which penetrates the heating element 13 in the axial direction thereof, and around the through-hole 131. A plurality of through holes (in FIG. 1, through holes 13 2 and 13 3 are shown) are provided.

The shape (number of grooves, diameter of through-holes) and number of air flow passages in the heating element 13 along with the type and composition of the carbonaceous material, the ignition time, burning speed, combustion temperature, and combustion of the heating element Affects combustion characteristics such as the amount of product generated. In particular, the ignition time characteristics must be such that the user can use the cigarette without any discomfort from igniting a normal cigarette (within about 1 second). According to the present invention, the ignition time of the carbonaceous molded article within about 1.5 seconds is set so that the thermal conductivity at room temperature (about 22 ° C) becomes 1.0 W / m · K or less. It was found that this could be achieved by selecting the composition of the quality material. So According to the present invention, a heating element is formed by using a carbon material composition (residual carbon) containing a substantially nonporous inorganic filler in a proportion of 15 to 65% by mass. As a result, a substantial reduction in the amount of carbon can be provided, and the amount of combustion products, particularly carbon monoxide, can be further improved. It was found that the total amount could be reduced. As a substantially non-porous inorganic filler, calcium carbonate having a BET specific surface area of 3 m ² / g or less is particularly suitable. The heat generated by the combustion of the heating element 13 heats the flavor generating element 15 disposed adjacent to the heating element, and evaporates and releases the flavor.

The heating element 13 is usually inserted and fixed in the cylindrical body 11 with its outer periphery surrounded by a heat-resistant enclosure member 14.

In the tubular body 11, a flavor supplement 18 can be arranged downstream of the flavor generator 15. The flavor supplement 18 carries, in addition to the flavor components generated from the flavor generator 15, various flavors that require further characterization of the flavor or that are preferably not exposed to high temperatures. It can be made up of tobacco and recycled tobacco according to the purpose, or it can be made of paper, non-woven cloth or other carrier carrying fragrance. It can also be configured. Further, the flavor supplement 18 can be provided in the form of a molded article containing a flavor.

The mouthpiece 17 can be provided with a tobacco finolator 171, commonly used in the art. The amount of flavor that can be smoked by the user is ultimately determined by the amount of flavor produced. For efficient delivery, a low-filtration finalizer with a filtration rate of 20% or less can be used, or a hollow finalizer can be used. In addition, the suction port 17 is provided with a heat insulating material at a desired position (usually in the circumferential direction of the suction port 17) as necessary to adjust the suction volume and suction pressure. A plurality of ventilation holes VH can be formed by penetrating through the cylindrical body 2 and the cylindrical body 11.

In the present invention, the flavor generator 15 and the flavor supplement 18 can be arranged so as to be in direct contact with each other, but as shown in FIG. It is preferable to provide one. The void 19 promotes cooling of the aerosol or flavor generated from the flavor generator 15 and condenses in the flavor replenisher 18 and the mouth 17. In some cases, the loss due to this can be reduced. The volume of the gap 19 can be appropriately set according to the purpose. When the void 19 is provided in this way, as shown in FIG. 1, a gas permeable member 16 b similar to the gas permeable member 16 a is provided at the downstream end of the flavor generator 15. It can be provided to prevent the particulate matter 15 1 from moving.

In the present invention, it is preferable that the particulate matter 15 1 in the filling cylinder 11 be packed closest. If the particulate matter 15 1 is loosely filled, it will be in an unevenly filled state during use, and the fluid flow path formed between the particulate matter 15 1 will also be biased and the uniformity of the flavor delivery amount will be impaired. It is preferable to use close packing so that the initial filling state can be maintained. Here, the close packing refers to a state in which the granular material is densely packed by vibration, tapping, or the like. Here, the filling length (L) of the closest-packed granular material 15 1 and the inner diameter (D) of the cylindrical body 11 are set so that their ratio (LD) force S 2 to 4 is obtained. I found that I liked doing it. If this ratio is smaller than 2, the generation behavior of flavor components from the flavor generator 15 tends to be easily influenced by the heat generation pattern of the heater 13, while on the other hand, When the ratio is larger than 4, the amount of the flavor to be delivered tends to decrease due to the condensation and deposition in the flavor-generating organism 15, and the uniformity of flavor delivery tends to decrease. Therefore, when the inner diameter (D) of the cylindrical body 11 is about 7 to 8 mm as in a normal cigarette, the filling length (L) is in the range of about 14 to 32 mm. It is preferable to set. The size of the granular material 15 1 is determined by the ratio (D / d) between the representative diameter (d) and the inner diameter (D) of the cylindrical body 11 (D / d): S 3.5-: 16, especially 4- : It turned out that setting to be 15 is preferable. When this ratio is smaller than 4, the heat capacity of the particulate matter 1 51 1 increases and the amount of flavor to be delivered at the start of sucking tends to decrease, and the ratio is 15 If it is larger, the suction resistance increases, and it tends to be difficult to suck. Therefore, when the inner diameter (D) of the cylindrical body 11 is about 7 to 8 mm, similar to a normal cigarette, the typical diameter of the granular material 151 is about 2.0 to 0. It is preferable to set it in the range of 5 mm. Here, the representative diameter of the granular material means the longest diameter in the axial direction or the radial direction.

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

Experimental example 1 Figure 2 A and Figure 2 B, when in the non-porous inorganic filler using a carbonate mosquitoes Le sheet c beam having a BET specific surface area lm ² Z g, was mixed with flavoring substances (Fig. 2 A), porosity These are the DSC analysis results when alumina with a specific surface area of 120 m 2 Z g was used as the inorganic filler and mixed with the same flavor substance at the same ratio (Fig. 2B). As shown in Fig. 2A, when a non-porous inorganic filler was used, the endothermic peak due to the vaporization of the flavoring substance appeared only once, whereas the non-porous inorganic filler appeared as shown in Fig. 2B. When a porous inorganic filler is used, in addition to one endothermic peak (endothermic peak (1)), a second endothermic peak (endothermic peak (2)) appears in a higher temperature region. This indicates that the flavoring material adsorbed on the porous material requires more energy to evaporate, and the use of non-porous material is a significant advantage. You can see that there is. Example 1

A smoking article with the structure shown in Fig. 1 was manufactured with the following specifications.

Tubular body>

Material: Aluminum foil laminated paper

¾: 8 5 m

Inner diameter (D) 7.5 mm

Scent generator>

Composition: BET specific surface area lm ² Zg calcium carbonate 80% by mass

Main Chinore inhibit mud key Shechinoresenore B over scan 1 mass ^_0/0 grayed Li Se Li emissions (flavorings) 1 9 mass ^_0/0

Shape: spherical Representative diameter (d): 1.5 mm

Closest packing length (L): 15 mm

L / D = 2

D / d = 5

Gum flavor supply body>

Composition: yellow seed tobacco chopping

Length: 20 mm

Finale

Length: 20 mm

Heating element>

Composition: 85 mass% carbon

BET specific surface area lm ² g of canola carbonate 15 g

Length: 丄 5 mm

For this smoking article, an automatic smoking machine smoked each puff with a capacity of 50 mL for 2 seconds at intervals of 30 seconds, and measured the amount of flavor substances collected for each puff. The results are shown in Figure 3. In addition, the uniformity index (discussed below) regarding the release of flavor components of the smoking article of this example was 0.79. The total amount of flavor substances collected was about 11 mg.

Example 2

The closest packing length of the granules constituting the flavor generator is 3 O mm (L / D = 4; no void), and the typical diameter of the granules is 1.0 mm A smoking article similar to that of Example 1 was prepared except that (Ό / d = 7.5). For this smoking article, the results of measuring the amount of flavoring substances collected for each puff by using an automatic smoking machine, with a puff capacity of 50 mLZ and smoking for 2 seconds at intervals of 30 seconds. Figure 4 shows. The uniformity index of the smoking article of this example was 0.81, which was a high value, but the total amount of flavor substances collected by the LZD was lower than that of the previous example because of the large LZD. mg.

The uniformity index in the above examples was calculated as follows using the measured values of 2 to 11 puffs.

Uniformity index = 1 (coefficient of variation)

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

This uniformity index indicates that the closer to 1, the better.

FIG. 5 shows the result of plotting the amount of heat flowing into the flavor generator from the carbon molded article heating element in the smoking article of Example 1 for each puff. The basis for setting the evaluation range of the uniformity index to 2 to 11 puffs was that the amount of heat flowing into the flavor generator was 50% or more of its maximum value (almost 5 puffs).

Example 3

A smoking article was produced in the same manner as in Example 1 except that the content of calcium carbonate in the heating element was 40% by mass, and the smoking operation was performed in the same manner. As a result, the amount of generated carbon monoxide was reduced to 55% of that in Example 1.

Comparative Example 1

Flavor generators are susceptible to heat and burn easily In this case, the state of filling changes due to combustion, and the amount of flavor generation increases rapidly due to the heat of combustion, so that the behavior becomes even more inhomogeneous than the heating behavior of the heating element itself. . Japanese Patent Application Laid-Open No. 6-46881 discloses a sheet chopping medium consisting of pulp and tobacco-based material containing 40% by mass of a flavor substance (eg, glycerin). The resulting flavor generator was filled into a length of about 3 Omm to produce a smoking article similar to that of Example 2, and the result of measuring the amount of flavor substance collected for each puff is shown in FIG. The total amount of flavor substances collected was about 13 mg, which was not much different from that of Example 1, but the uniformity index was very low at 0.31. Furthermore, when the smoking article was unpacked after smoking, incineration and burning of the sheet cut due to combustion were observed.

Example 4

The smoking article of Example 1 and Example 2 and the smoking article of Comparative Example 1 were actually compared and smoked by an expertly trained taste panel. As a result, the smoking articles of Example 1 and Example 2 according to the present invention have a stable perceived amount of flavor smoke in each puff. It was evaluated that the persistence of volume was high. In the smoking article of Comparative Example 1, a specific change in taste was observed in the latter half of smoking due to the burning of the flavor generator.

As described above, according to the present invention, with a simple structure, a stable amount of flavor is delivered for each puff during smoking of a user, and the smoke amount and the taste vary unevenly. A smoking article is provided that allows the user to enjoy smoking without feeling stress.

Claims

The scope of the claims

1. A cylindrical body provided with a heating element at a front end and a mouthpiece at a rear end, and a flavor generator provided in the cylindrical body and close to the heating element; The flavor generator comprises, on a dry weight basis, a substantially non-porous inorganic filler at a rate of 65-93% by weight, a binder at a rate of 1-3% by weight, and a flavorant at a rate of 6-93%. A smoking article containing a plurality of particulates, each containing 3% by mass.

2. The smoking article according to claim 1, wherein the inorganic filler has a BET specific surface area of 3 m ² Zg or less.

3. The smoking article according to claim 2, wherein the inorganic filler is calcium carbonate.

4. The granular material is packed in a close-packed state, and the ratio of the filling length of the granular material in the axial direction of the cylindrical body to the inner diameter of the cylindrical body is in the range of 2 to 4, The smoking article according to claim 1, wherein the ratio of the inner diameter of the body to the representative diameter of the granular material is 4 to 15.

5. The smoking article according to claim 1, wherein the particulate matter is in the form of a pellet, tablet or sphere.

6. The smoking article according to claim 1, wherein the binder comprises methyl hydroxydextrin cellulose.

7. The smoking article according to claim 1, wherein the heating element exhibits a thermal conductivity of 1.0 W nom · or less at room temperature.

8. The smoking article according to claim 1, wherein the heating element is made of a carbonaceous material containing 15 to 65% by mass of a substantially non-porous inorganic filler.

9. Inorganic filler contained in the heating element, 3 m ² or more The smoking article according to claim 1, comprising calcium carbonate having the following BET specific surface area.

10. The smoking article according to claim 1, wherein the mouthpiece is formed of a binoletter having a filtration rate of 20% or less.

11. The smoking article according to claim 1, wherein the mouthpiece is constituted by a hollow filter. '