TWI226821B - Smoke article - Google Patents

Abstract

Disclosed is a smoke article (10) which has a cylindrical body (11) and a flavor generator (15). The fore end and the rear end are respectively provided with a heating element (13) and a foot (17). The flavor generator (15) is disposed near the heating element (13) within the cylindrical body (11). The flavor generator (15) contains plural particles (151) comprising an inorganic filler being substantially nonporous of 65 to 93% by mass, a binder of 1 to 3% by mass and a flavor substance of 6 to 32% by mass, on the ratio of dry mass basis.

Description

1226821 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a smoking article, and more specifically, to a smoking article having a scent generating body that generates scent by heating but not by burning . [Prior art] As is well known, various types of smoking articles that can enjoy the flavor of cigarettes and smoke without burning tobacco leaves have been proposed. For example: Japanese Patent Laid-Open No. 6 3 —3 5 4 6 8; Japanese Patent Laid-Open No. 6 — 4 6 8 1 8; Japanese Patent No. 1 6 8 1 6 7 0; Japanese Patent No. 3 0 1 2 Japanese Patent Application Publication No. 2 No. 5 No. 3, No. 2-8 4 1 6 4 discloses a typical example of a smoking article that uses the heat generated by a heat generating member attached to the tip to generate a fragrance. These smoking articles are filled with a granular or sheet-like flavor generator between the heat generating member and the mouthpiece, and when the flavor generator is heated by the heat of the heat generating member, the flavor components are vaporized and released. As for the flavor generator, various molded articles such as non-combustible porous materials and cigarette materials have been proposed. However, in the porous substance, a large amount of energy is required to vaporize or desorb the fragrance substance adsorbed inside, and therefore, there is a possibility that the vaporization efficiency is reduced or the fragrance substance is thermally deformed. In addition, when a flammable substance of a cigarette material is used as a base material, it may substantially cause combustion or thermal decomposition, so the thermal phenomenon is very unstable, which may adversely affect the amount of flavor delivered. * This type of smoking article also has a fundamental problem that the amount of fragrance generated is easily affected by the heating condition of the heating element. Among the heat generating components, the fuel element system made of carbon as the main raw material is the most common user. However, it is usually used in

314279.ptd Page 7 1226821 V. Description of the invention (2) During the period from point J to the first half of smoking, the maximum amount of calorific value will appear, after which the calorific value gradually decreases until the flameout is uneven. Therefore, the amount of fragrance produced by this heat also has the same phenomenon, especially the maximum amount of fragrance ~ and the amount in the second half of smoking will have a considerable gap. Therefore, when the user smokes, there is a problem that he / she feels stress due to an uneven change in the amount of smoke or taste, which results in a decrease in satisfaction. On the other hand, Japanese Unexamined Patent Publication No. 5-2 7 7 1 9 1 discloses that in order to deliver a certain quality of flavor, a fuel member and a flavor generating body that has a predetermined number of smokings are formed and bonded to a plate. Example of a smoking article @ However, in order to adhere the combustion member and the aroma generating body or the insulating intermediary, the temperature of the combustion member will be lowered, making the combustion difficult to continue, so there is a risk of extinguishing it halfway, and the aroma generating body is often heated, so There is a risk of deterioration in quality due to unnecessary heating. In addition, because the burning speed and the timing of smoking must be matched with the burner, it is not possible to smoke at this interval according to the user's preference. This not only increases the pressure of the smoker, but also has a complicated structure and is extremely difficult to manufacture. The present invention has been developed in view of the above-mentioned problems, and an object thereof is to provide a structure with a simple structure and a stable amount of fragrance by a user during smoking / smoke without any uneven changes in the amount of smoke or taste. If you feel pressure, you can enjoy smoking. [Summary of the Invention] In order to solve the above-mentioned problem, the present invention provides a smoking article, which comprises a cylinder k provided with a heating element at a front end portion and a mouthpiece portion at a rear end portion; The scent provided by the heating element generates

314279.ptd Page 8 1226821 V. Description of the invention (3) The body is characterized in that the aroma generating system is composed of a plurality of granules, and the granules include: based on dry mass (that is, not Proportion of the state including moisture), 65 to 93% by mass of a substantially non-porous inorganic filler; 1 to 3% by mass of a binder; and 6 to 32% by mass of a fragrance substance. The inorganic filler of the present invention preferably has a BET specific surface area of 3 m2 / g or less, and is preferably a carbonate. The granular material is filled in the most dense 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 preferably in the range of 2 to 4, and the cylindrical body The ratio of the inner diameter of the shaped body to the representative diameter of the granules is preferably 4 to 15. Pellets can be in the form of pellets, flakes, or spheres. The binder of the present invention preferably contains methylhydroxyethyl cellulose. In an ideal aspect of the present invention, the heating element has a thermal conductivity of 1.0 W / m · K or less at normal temperature. The heating element is preferably composed of a carbonaceous material containing 15 to 65% by mass of a substantially non-porous inorganic filling material; the inorganic filling material contained in the heating element is preferably composed of 3 m V g The following BET specific surface area is composed of carbonic acid. The mouthpiece portion of the smoking article of the present invention is composed of a filter (f i 11 e r) having a filtration rate of 20% or less, or a hollow filter. [Embodiment] Hereinafter, the present invention will be described in detail. The smoking article of the present invention is a so-called non-combustible smoking article which prevents the aroma generating body from burning, and has the following characteristics:

314279.ptd Page 9 1226821 V. Description of the Invention (4) The heat is generated by heating to emit a flavor component. The flavor generating body has a specific composition and is provided in the cylindrical body. A heating element is provided at a front end portion of the cylindrical body, and a suction port portion is formed at a rear end portion of the cylindrical body. -Fig. 1 is a schematic sectional view > showing a structural example of a smoking article of the present invention. The smoking article 10 shown in Fig. 1 includes a cylindrical body 11 for constituting the smoking article body. A heating element 13 is provided at a front end portion of the cylindrical body 11, and a suction port portion 17 is formed at a rear end portion of the cylindrical body. The scent-generating body 15 of the present invention is provided in the cylindrical body 11 near the heating body 13. Generally, the cylindrical body 11 is cylindrical, and is preferably made of a material that is stable to heat such as aluminum and stainless steel. In addition, it is desirable to reduce the thickness to, for example, 0.0 in order to reduce the heat storage. 3mm 至 0. 1 of the thickness. The tubular body 11 is, like a general cigarette, an inner diameter of about 7 mm to 8 mm and a length of about 8 mm to 12 mm. Generally speaking, the outer side of the cylindrical body 1 1 is rolled up by the heat-insulating material 12 so that the hand can be conveniently held. 2. The flavor generating body 15 used in the smoking article of the present invention is composed of a plurality of accumulated products 1 51, and the granular material 15 1 includes: based on dry mass, 6 5 to 9 3 mass The non-porous inorganic filler is substantially non-porous; the binder is 1 to 3% by mass; and the non-porous material is 6 to 32% by mass. _ Flavoring substances include substances that generate aerosol (aer oso 1) by heating with the heat generated by the ignited heating element (alcohol, sugar, q water), or substances that only generate flavor (menthol, coffee Factors, natural extracts), cigarettes, cigarette extracts, mixtures of these, etc. In terms of alcohol, for example, glycerin (g 1 y c e r i η), propylene glycol (p r 〇 p y 1 e n e

314279.ptd Page 10 1226821 V. Description of the invention (5) g 1 y c ο 1), and mixtures of these. The substantially non-porous inorganic filler which is one of the components of the flavor generator 15 preferably has a B E T specific surface area of 3 m 2 / g or less. Activated carbon, alumina beads, ceramics such as silicon dioxide, molecular sieves, and so-called porous materials with numerous fine pores have the property of absorbing other materials by adsorption or absorption inside them. In a smoking article such as the smoking article of the present invention, when the fragrance is efficiently released by heating, if a fragrance substance is inhaled in the hole of the substrate, in addition to the heat energy required for the evaporation of the fragrance substance, it is also necessary to use The thermal energy of the scent substance detached from the hole will not only reduce the vaporization efficiency, but on the other hand, continuous heating in the hole will easily cause the problem of thermal denaturation. In the present invention, the fragrance substance is held only in the space between the particles of the substrate composed of an inorganic filler material which is substantially a non-porous substance. Therefore, the above-mentioned problem of the porous substance does not occur, and the fragrance can be easily changed from the fragrance by heating. The generating body 15 is released. As a substantially non-porous, porous inorganic filler, it is particularly preferable to use carbonate particles having a specific surface area of B E T of 3 m 2 / g or less. Or you can use cigarette raw materials or substitute plant raw materials and their extracts to form granular shaped articles, and because of heating, it is easy to cause combustion or thermal decomposition, so the unstable thermal phenomenon easily leads to uneven delivery of flavor, and because it is porous Quality, so the problem of thermal degeneration of fragrance may also occur. As the binder contained in the flavor generating body of the present invention, cellulose, or various cellulose derivatives, alginic acid (a 1 ginicacid), sucralose, xa η ΐ henegum can be used. , Spiny bean curd, etc. In particular, methylhydroxyethyl cellulose is used.

Jl! 314279.pid Page 11 1226821 May Day Invention (6) c e 1 1 u 1 〇 s e), not only can improve the retention of flavoring substances, but also provide good cigarette flavor. The larger the amount of the binder, the stronger the physical strength of the formed article, and the easier it is to handle. However, almost all adhesives have an adverse effect on flavor when heated at a high temperature. Therefore, as long as it does not interfere with the processing, a small amount is preferred within the range of 1 to 3% by mass. The granular (shaped) product of the body is obtained by mixing substantially non-porous inorganic filler material, a binder and a scent substance in the above proportion, and then adding a suitable amount of water required for the binder to produce a cohesive force. Extruders, granulators, spindles, etc. are shaped to the desired size and shape. Therefore, pellets can be shaped into pellets, flakes, or spheres. As shown in Figure 1, in the heating element A gas-permeable, heat-resistant member 16a is provided between the 13 and the fragrance generating body 15 so that the fragrance generating body 15 will directly contact the heating body 13 ... In the smoking article, the heating element 13 provided at the front end of the cylindrical body 11 can be formed of a carbonaceous material such as carbon. The carbonaceous material can be formed into a desired shape using an extruder molding machine, a chipping machine, or the like. Carbon The shape of the formed body is preferably cylindrical. The heat system sucks air through the mouthpiece, and introduces air from the outer body M to the inside of the cylindrical body 1 1 from the heating element 13, and the air introduced by the heating element 13 is circulated to the granules 15 of the fragrance generating body 15 One air flow passage is provided with air circulation to taste the fragrance components generated. This air flow passage is provided along the long axis of the cylindrical body 11 on the outer periphery of the carbon cylindrical shaped body. It is constituted by at least one groove in the plane, or by passing through at least one of the carbon cylindrical shaped body along the length axis of the cylindrical body 11

314279.ptd Page 12 1226821 V. Description of the invention (7) Consisting of through-holes. In Fig. 1, for such a flow path, a central through-hole 1 3 1 that penetrates the heating element 13 in the axial direction and a plurality of through-holes (the first through-holes provided around the through-hole 1 3 1) are provided. In the figure, the through-holes 132 and 133 are shown. The shape of the air flow path (the depth of the groove and the diameter of the through-hole) and the number of the heating elements 1 and 3, as well as the type or composition of the carbonaceous material, all affect Combustion characteristics such as ignition time, combustion speed, combustion temperature, and amount of combustion products are affected. In particular, in terms of the lighting time characteristics, it is required that the user does not feel inconvenient to use when lighting a general cigarette (within about 1 second). It can be known from the present invention that the ignition time of the carbonaceous formed body within about 1.5 seconds can be selected by the composition of the carbonaceous material so that the thermal conductivity at normal temperature (about 2 2 ° C) becomes 1. OW / m · K the following. Furthermore, according to the present invention, a heating element can be formed by forming a carbonaceous material composition (the remainder is carbon) containing a substantially non-porous inorganic filler in a proportion of 15 to 65% by mass. Carbon content, and further reduce the amount of combustion products, especially carbon monoxide, while reducing the amount of combustion (ie, the number of cigarettes), can also reduce the total amount of combustion products. As a substantially non-porous inorganic filler, calcium carbonate having a B E T 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 fragrance generating element 15 disposed adjacent to the heating element to vaporize and emit the fragrance. In general, the heat generating body 13 is surrounded by a heat-resistant surrounding member 14 and is inserted into and fixed in the cylindrical body 11. In the cylindrical body 11, a flavor supplement body 18 may be disposed on the downstream side of the flavor generating body 15. Fragrance supplements 1 to 8 are produced in addition to the aroma generators 1 to 5.

314279.ptd Page 13 1226821 V. Description of the invention (8) @In addition to flavor components, when flavor characteristics must be added, various spices that are preferably not exposed to high temperature can be placed, and cigarettes and recycled cigarettes can be used according to the purpose It may be configured, or may be configured by a carrier such as paper or a nonwoven fabric on which perfume is placed. In addition, the flavor supplement 18 may be in the form of a molded article containing a fragrance. The mouthpiece portion 17 can be generally provided with a filter 1 71 for a cigarette generally used in this technical field. As for the amount of cigarettes produced, in order to efficiently deliver the amount of scent that a user can smoke, a filter with a filtration rate of 20% or less (f i 11 e r) or a hollow filter can be used. In addition, in order to adjust the suction or suction pressure, the mouthpiece portion 17 may be passed through the heat insulating material 12 and the cylindrical body 11 at a desired position (usually the circumferential direction of the mouthpiece portion 17) as necessary to form a plurality. VH. 1 In the present invention, although the flavor generating body 15 and the flavor supplementing body 18 may be arranged in contact with each other, as shown in Fig. 1, it is preferable to provide the gap portion 19 at the simpler of the two. The void portion 19 can promote the cooling of the aerosol or fragrance generated by the fragrance generating body 15 to reduce the loss caused by condensation on the fragrance supplementing body 18 and the mouthpiece 17. The volume of the void portion 19 can be appropriately set according to these purposes. As shown in FIG. 1, when the portion 19 is provided, a breathable member 1 6 b having the same heat resistance as the heat resistance 6 a can be provided at the downstream end of the flavor generating body 15, and the granular material 1 5 1 can be provided. In the present invention, the most dense filling of the granular material 1 5 1 in the filling cylinder 11 is preferred. When the particles 1 5 1 are filled loosely, an uneven filling state will be formed during use. In this way, the fluid formed between the particles 1 5 1

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314279.ptd Page 14 1226821 V. Description of the invention (9) The flow path will also shift and the averageness of the fragrance delivery amount will be impaired. Therefore, it is advisable to form the most dense filling and maintain the initial filling state. Here, the most dense filling refers to the formation of a tight filling state by vibration or tapping on the granular material. Here, it can be seen that the filling length (L) of the most densely packed granular material 1 5 1 and the inner diameter (D) of the cylindrical body 1 1 are set to a ratio (L / D) of 2 to 4 The range is appropriate. When the ratio is less than 2, the phenomenon that fragrance components are generated by the fragrance generating body 15 tends to be easily affected by the heating method of the heating body 13; on the other hand, when the ratio is greater than 4, the body Condensation and sedimentation tends to reduce the amount of fragrance sent, and meanwhile, the averageness of fragrance sent also tends to decrease. Therefore, when the inner diameter (D) of the cylindrical body 11 is the same as that of a normal cigarette, it is desirable to set the filling length (L) in the range of about 14 to 32 mm when the diameter is about 7 to 8 rar. In addition, it can be seen that the size of the granular material 151, which represents the ratio (D / d) of the diameter (d) to the internal diameter (D) of the cylindrical body 1 1 is set to 3.5 to 16, especially A range of 4 to 15 is appropriate. When the ratio is less than 4, because the thermal capacity of a granular material 1 51 will increase, the amount of fragrance emitted at the beginning of inhalation will tend to decrease; further, when the ratio is more than 15, the resistance to attraction will increase, Therefore, it is difficult to inhale. Therefore, the inner diameter (D) of the cylindrical body 11 is the same as that of a normal cigarette, and when the diameter is about 7 to 8 legs, the representative diameter of the granular material is set to a range of about 2.0 to 0.5 legs. . 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 based on examples, but the present invention is not limited thereto.

314279.ptd Page 15 1226821 V. Description of the Invention (. Experimental Example 1) Figures 2A and 2B show the use of calcium carbonate with a BET specific surface area of lm2 / g as a non-porous inorganic filler, respectively. DSC analysis results when mixed with flavor substances (Figure 2A); and when using aluminum with a BET specific surface area of 120m2 / gi as the porous inorganic filler and mixed with flavor substances at the same ratio (Figure 2B) DSC analysis results. As shown in Fig. 2A, when a non-porous non-organic filling material is used, the endothermic peak due to the vaporization of the fragrance substance appears only once. In contrast, as shown in Fig. 2B, when a porous inorganic filling material is used In addition to an endothermic peak (endothermic peak (1)), the second endothermic peak (endothermic peak (2)) appears in the high temperature region. This system indicates that in order to vaporize the scent substance adsorbed on the porous substance, more energy is required, and it can be seen that the use of a non-porous substance is advantageous. 7 Example 1)-: The structure of the smoking article shown in Fig. 1 is manufactured according to the following specifications: X cylindrical body> Material: Aluminum foil laminated paper Length: 8 5mm '(D) ·· 7 · 5mm Taste producing body 〉 80% by mass 1% by mass 19% by mass Composition: BET specific surface area lm2 / g of calcium carbonate hydroxyethyl cellulose glycerol (flavor substance)% shape: spherical shape

314279.pid Page 16 1226821 V. Description of the invention (11) Representative diameter (d): 1 · 5ram The most dense filling length (L): 1 5mra L / D = 2 D / d = 5 <fragrance supplement> Composition : Yellow tobacco length: 2 Omm <suction section> Filter length · 2 (tom <heating body> Composition: carbon 8 5 mass% BET specific surface area lm2 / g calcium carbonate 15 mass% <void section> Length: 15mm This smoking article was smoked with an automatic smoking machine at a capacity of 50 m L / 2 seconds per 30 seconds, and the measurement results of the mass of cigarettes collected in each cigarette are shown in Fig. 3. The average index (described below) of the flavor components released from the smoking article of this example is 0.79. The total collected amount of the flavor substance is about 1 1 mg. (Example 2) Except for the particles constituting the flavor generating body, The most dense filling length of the object is set to 30mm (L / D = 4; no gap portion), and the representative diameter of the granular object is set to 1.0mm (D / d = 7. 5), all other parts are Similar to Example 1

314279.ptd Page 17 1226821 V. Description of the Invention (12) It is clever, and the same smoking article as in Example 1 is prepared. This smoking article was smoked using an automatic smoking machine at a volume of 50 mL / 2 seconds for one puff every 30 seconds, and the measurement results of the mass of cigarettes collected in each puff are shown in FIG. 4. The average index value of the smoking article in this embodiment is as high as 0.81. However, if the L / D is increased, the total amount of scented substances will be reduced compared to the previous example and will be about 7 mg. The average index of the above embodiment uses the measured values of the 2nd to 11th cigarettes and is calculated in the following way: Average index 21 (Coefficient of variation) β Coefficient of variation = (Standard deviation) / (Average value) The average index indicates that the closer to 1, the better. Fig. 5 is a graph showing the results of graphing the amount of heat that flows from the carbon shaped product heating element to the flavor generating element in each smoking article in the smoking article of Example 1. The evaluation range of the average index is based on the second to eleventh cigarettes, and on the condition that 50% of the maximum amount of heat flowing into the aroma generating body (approximately the fifth cigarette) is seven percent. (Example 3) Except that the content of calcium carbonate in the heating element was set to 40% by mass, the other parts were the same as in Example 1, and the same smoking article as in Example 1 was prepared, and then smoking was performed in the same manner. operating. As a result, the amount of carbon monoxide produced was reduced to 5% in the case of Example 1. (Comparative Example 1) When the flavor generating body is heat-resistant and flammable, the filling state changes due to combustion, and the amount of flavor generated by the heat of combustion

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314279.ptd Page 18 1226821 V. Description of the invention (13) The surge has caused the heating phenomenon of the heating element itself to become more uneven. The plate-shaped tobacco shredded medium composed of a slurry (pu 1 p) and a tobacco material described in Japanese Patent Application Laid-Open No. 6-4 6 8 1 8 contains 40% by mass of a flavoring substance (for example: The glycerol) flavor generating body was filled to a length of about 3 mm, and the same smoking article as in Example 2 was prepared, and the measurement results of the mass of flavor collected in each cigarette are shown in FIG. 6. The total collected amount of the flavoring substance was about 13 mg. Although there was no significant difference from Example 1, the average index was as low as 0.31. Furthermore, when the smoking article after opening is opened, the ashing and burning of the plate-like tobacco shreds can be seen. (Embodiment 4) A specially trained smoking odor panel (p a n e 1 i s t) was used to actually smoke the smoking articles of Examples 1 and 2, and the smoking articles of Comparative 1 and compare them. As a result, the smoking articles of Examples 1 and 2 of the present invention have a relatively stable amount of scented smoke per cigarette. In particular, the amount of scent does not decrease when the second half of the cigarette is smoked. Therefore, smoke can be obtained when smoking is performed. Evaluation of continuous high sense of volume. Further, in the smoking article of Comparative Example 1, when the second half of the cigarette was smoked, a special change in smoke taste was generated due to the burning of the aroma generating body. As described above, according to the present invention, the object is to provide a simple structure, and when a user smokes, each cigarette can send out a stable amount of fragrance without causing pressure due to uneven changes in the amount of smoke or taste,吸烟 Smoking items that can enjoy the pleasure of smoking.

314279.ptd Page 19 1226821 Brief description of drawings [. Brief description of drawings] Fig. 1 is a schematic cross-sectional view showing a smoking article according to a first embodiment of the present invention. Figures 2A and 2B are graphs showing the results of DSC analysis when a non-porous β-free filler and a porous inorganic filler are used as the inorganic filler when mixed with a fragrance substance. Fig. 3 is a graph showing the quality of the flavor of each cigarette in the smoking article of Example 1 described later in detail. Fig. 4 is a view showing a smoking article in the smoking article of Example 2 described in detail later.

A chart of the quality of a scent of smoke. FIG. 5 is a chart in which the heat quantity flowing from the carbon-forming object heating body to the aroma generating body in each of the cigarettes in the smoking article of Embodiment 1 is not drawn. -Fig. 6 is a graph showing the smoking article of Comparative Example 1 detailed below, and collecting the mass of scent of smoke per V. 10 smoking article 11 tubular body 12 heat-insulating material 13 heating element surrounding member 15 flavor generation Body 1 〇a, heat-generating member 16b, air-permeable member 17, suction port 18, fragrance supplement J9, voids 131, 132 ~ 133, penetrating • 151 granular 171 filter VH ventilation D

314279.ptd Page 20

Claims (1)

1226821 6. Scope of patent application 1. A smoking article comprising: a cylindrical body provided with a heating element at a front end portion and a mouthpiece portion at a rear end portion; and a scent provided near the heating body in the cylindrical body. The production body is characterized in that the fragrance generating system is composed of a plurality of granular materials, and the granular materials system includes: a non-porous inorganic filler with a proportion of 65 to 93% by mass based on the dry mass. Material; a binder in a proportion of 1 to 3% by mass; and a fragrance substance in a proportion of 6 to 32% by mass. 2. The smoking article according to item 1 of the patent application range, wherein the inorganic filler has a specific surface area of B E T of 3 m 2 / g or less. 3. The smoking article according to item 2 of the patent application, wherein the inorganic filler is calcium carbonate. 4. The smoking article according to item 1 of the patent application scope, wherein the granular material is filled in the most dense state, and the filling length of the granular material in the axial direction of the cylindrical body is the same as that of the cylindrical body. The ratio of the inner diameter is in the range of 2 to 4, and the ratio of the inner diameter of the cylindrical body to the representative diameter of the granular material is in the range of 4 to 15. 5. The smoking article according to item 1 of the scope of patent application, wherein the granules are in the form of pellets, flakes, or balls. 6. The smoking article according to item 1 of the patent application scope, wherein the above-mentioned adhesive comprises fluorenyl hydroxyethyl cellulose. 7. The smoking article according to item 1 of the patent application range, wherein the heating element has a thermal conductivity of 1.0 W / m · K or less at normal temperature. 8. The smoking article according to item 1 of the scope of patent application, wherein the heating element is composed of a substantially non-porous inorganic material containing a proportion of 15 to 65% by mass. 314279.ptd Page 21 1226821 VI. Scope of patent application It is made of carbonaceous material. 9. The smoking article according to item 1 of the patent application range, wherein the inorganic filler included in the heating element is composed of calcium carbonate having a BET specific surface area of 3 m2 / g or less. 10. The smoking article according to item 1 of the scope of patent application, wherein the mouthpiece portion is composed of a filter (f i 11 e r) with a filtration rate of 20% or less. 11. The smoking article according to item 1 of the patent application scope, wherein said mouthpiece portion is composed of a hollow filter. 3] 4279.ptd Page 22