EP1468618A1 - Rauchvorrichtung - Google Patents

Rauchvorrichtung Download PDF

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Publication number
EP1468618A1
EP1468618A1 EP02806062A EP02806062A EP1468618A1 EP 1468618 A1 EP1468618 A1 EP 1468618A1 EP 02806062 A EP02806062 A EP 02806062A EP 02806062 A EP02806062 A EP 02806062A EP 1468618 A1 EP1468618 A1 EP 1468618A1
Authority
EP
European Patent Office
Prior art keywords
smoking article
generating member
flavor
article according
heat generating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02806062A
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English (en)
French (fr)
Other versions
EP1468618A4 (de
EP1468618B1 (de
Inventor
Manabu Japan Tobacco Inc. TAKEUCHI
Atsushi JAPAN TOBACCO INC. MIKITA
Hajime JAPAN TOBACCO INC. OHINATA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Tobacco Inc
Original Assignee
Japan Tobacco Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Japan Tobacco Inc filed Critical Japan Tobacco Inc
Publication of EP1468618A1 publication Critical patent/EP1468618A1/de
Publication of EP1468618A4 publication Critical patent/EP1468618A4/de
Application granted granted Critical
Publication of EP1468618B1 publication Critical patent/EP1468618B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/10—Chemical features of tobacco products or tobacco substitutes
    • A24B15/16—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F42/00—Simulated smoking devices other than electrically operated; Component parts thereof; Manufacture or testing thereof
    • A24F42/10—Devices with chemical heating means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/10—Chemical features of tobacco products or tobacco substitutes
    • A24B15/16—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes
    • A24B15/165—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes comprising as heat source a carbon fuel or an oxidized or thermally degraded carbonaceous fuel, e.g. carbohydrates, cellulosic material
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/22—Cigarettes with integrated combustible heat sources, e.g. with carbonaceous heat sources
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/17—Filters specially adapted for simulated smoking devices

Definitions

  • the present invention relates to a smoking article, and more specifically, to a smoking article that contains a flavor generating member that generates flavor by heating without burning.
  • a smoking article of the above-described type entails a basic problem, that is, the amount of flavor generated vary readily, depending on the heat generating status of the heat generating member.
  • a fuel element formed using carbon as the main raw material is most generally employed.
  • such a fuel element exhibits a non-uniform behavior in which the heat generating amount reaches its maximum value during the period from the ignition to the first half of the smoking and thereafter the heat generating amount gradually decreases to become eventually extinguished.
  • the amount of flavor released by the heat exhibits a similar behavior and thus there is a significant difference created between the maximum amount and specially the amount of the last half of the smoking. Therefore, it is pointed out that users feel a stress due to the non-uniform change in amount of smoke and in flavor during smoking, which degrades the feeling of satisfaction.
  • Jpn. Pat. Appln. KOKAI Publication No. 5-277191 discloses an example of the smoking article obtained by laminating a fuel member and a plate-like formed member made of a flavor generating member in amount corresponding to the predetermined number of puffs, together, in order to deliver a constant quality of flavor.
  • the temperature of the fuel member easily decreases, which makes it difficult to maintain the combustion, thereby making it highly possible that the article is extinguished.
  • the flavor generating member is heated at all times, the quality of the member is, in many cases, deteriorated by the unnecessary heat.
  • the article since the article requires matching between the burning rate of the fuel member with the timing of puffing, it is difficult for the users to take their own desired puffing intervals, thereby increasing the stress on the users.
  • the structure of the article is complicated, which makes the manufacturing process difficult accordingly.
  • the present invention has been achieved in view of the above-described drawbacks, and aims to provide a smoking article having a simple structure, that can deliver flavor in a stable amount at each puff, by which users can enjoy smoking without feeling the stress caused by an uneven change in amount of smoke and in flavor during smoking.
  • the present invention provides a smoking article comprising a hollow cylindrical member provided with a heat generating member at its distal end portion and a mouthend section at its proximal end portion, and a flavor generating member provided adjacent to the heat generating member within the cylindrical member, the flavor generating member comprising a plurality of granules each containing 65 to 93% by mass of a substantially non-porous inorganic filler material, 1 to 3% by mass of a binder and 6 to 32% by mass of a flavoring substance, on a dry mass basis (that is, an amount taken when the materials do not contain moisture).
  • the inorganic filler material have a BET specific surface area of 3 m 2 /g or less, and be made of calcium carbonate.
  • the granules be filled in the closest packing state, the ratio of the filled length in the axial direction of the cylindrical member of the granules to the inner diameter of the cylindrical member be in a range of 2 to 4, and the ratio of the inner diameter of the cylindrical member to the major diameter of the granules be 4 to 15.
  • the granules can be in the form of pellets, tablets or spheres.
  • the binder comprise methylhydroxyethylcellulose.
  • the heat generating member exhibits a thermal conductivity of 1.0 W/m ⁇ K or less at room temperature. It is preferable that the heat generating member be made of a carbonaceous material containing the substantially nonporous inorganic filler material in an amount of 15 to 65% by mass, and the inorganic filler material contained in the heat generating member be made of calcium carbonate having a BET specific surface area of 3 m 2 /g or less.
  • the mouthend portion can be constituted by a filter having a filtration efficiency of 20% or less, or a hollow filter.
  • a smoking article according to the present invention is a so-called non-combustion type smoking article that does not burn a flavor generating member, and provided with a flavor generating member that releases a flavor component when the member is heated by the heat generated from the heat generating member ignited.
  • the flavor generating member has a specified composition and is provided in a hollow cylindrical member.
  • the cylindrical member has a heat generating member at its distal end portion, and its proximal end portion constitutes a mouthend portion.
  • FIG. 1 is a schematic sectional view showing a structure of a smoking article according to an embodiment of the present invention.
  • a smoking article 10 shown in FIG. 1 has a hollow cylindrical member 11 that constitutes the main body of the smoking article.
  • a heat generating member 13 is provided at a distal end portion of the cylindrical member 11, and a proximal end portion of the cylindrical member 11 constitutes a mouthend portion 17.
  • a flavor generating member 15 of the present invention is provided adjacent to the heat generating member 13 within the cylindrical member 11.
  • the cylindrical member 11 is usually of a circular cylindrical shape, and is preferably made of a thermally stable material such as aluminum or stainless steel. Further, in order to reduce its heat capacity, the thickness of the cylindrical member 11 is preferably made small, for example, 0.03 mm to 0.1 mm.
  • the cylindrical member 11 may have an inner diameter of about 7 mm to 8 mm and a length of about 80 mm to 120 mm as in the case of usual cigarettes.
  • the entire outer surface of the cylindrical member 11 is usually wrapped around with a heat insulating member 12 so that the cylindrical member can be held by fingers without any trouble.
  • the flavor generating member 15 employed for the smoking article of the present invention is made of a plurality of granules each containing 65 to 93% by mass of a substantially non-porous inorganic filler material, 1 to 3% by mass of a binder and 6 to 32% by mass of a flavoring substance on a dry mass basis.
  • the flavoring substance includes, for example, a substance that generates aerosol (an alcohol, a saccharide, water), a substance that generates a flavor only (menthol, caffeine, a natural extract), when heated by the heat from the heat generating member burned, as well as tobacco, a tobacco extract, and a mixture of these.
  • a substance that generates aerosol an alcohol, a saccharide, water
  • menthol a substance that generates a flavor only
  • menthol caffeine, a natural extract
  • the substantially nonporous inorganic filler material which is one of the components of the flavor generating member 15, preferably has a BET specific surface area of 3 m 2 /g or less.
  • a so-called porous material that has innumerable extremely fine pores for example, activated carbon, ceramics such as alumina beads and silica, or a molecular sieve has a property of taking other substances inside by adsorption or absorption.
  • the flavoring substance is merely held in gaps each created between the substrate grains made of a substantially non-porous inorganic filler material.
  • the substantially nonporous inorganic filler material It is particularly preferable to use calcium carbonate grains having a BET specific surface area of 3 m 2 /g or less as the substantially nonporous inorganic filler material. It is fully possible that the granular molded materials are made of a tobacco raw material, or a substituting plant raw material and its extract, etc.; however, such a material, in many cases, causes combustion or thermal decomposition by heat and therefore the thermal behavior becomes unstable. As a result, the amount of flavor delivered is easily made unstable, and it is possible to cause the problem of the thermal denaturalization of the flavor due to the porousness.
  • the binder contained in the flavor generating member of the present invention cellulose, various types of cellulose derivatives, alginates, guar gum, xanthan gum, locust bean gum and the like can be used.
  • the use of methylhydroxyethylcellulose can improve the sustainability of the flavoring substance and provide excellent flavor and taste.
  • the amount of the binder added is increased, the physical strength of the molded material is increased, thereby making it possible to facilitate the handling of it.
  • most of the binders in many cases, create an unfavorable effect on the flavor when they are heated at a high temperature. Therefore, as long as the material can be handled without any particular troubles, the amount of the binder added should preferably be as small as in a range of 1 to 3% by mass.
  • the (molded or formed) granules that constitute the flavor generating member of the present invention can be prepared by mixing the substantially nonporous inorganic filler material, the binder and the flavoring substance in amounts mentioned above, and adding an appropriate amount of water required to generate the binding force of the binder. Then, the mixture is molded by an extruder, granulating machine, pelleting machine or the like into a predetermined size and shape. Thus, the granules can be formed into pellets, tablets, spheres or the like.
  • an air permeable heat resisting member 16a made of, for example, a metal mesh is provided between the heat generating member 13 and the flavor generating member 15 so that the flavor generating member 15 is not directly brought into contact with the heat generator 13.
  • the heat generating member 13 provided at the distal end portion of the cylindrical member 11 of the smoking article of the present invention can be made of a carbonaceous material such as carbon.
  • the carbonaceous material can be formed into a desired shape by an extruder, pelleting machine or the like. It is preferable that the shape of the carbonaceous material be circular cylinder.
  • Such a heat generating member includes an air flow path, through which air is introduced into the cylindrical member 11 from outside via the heat generating member 13 by a suction from the mouthend, and the introduced air heated by the heat generating member 13 is allowed to pass through the air flow path created between the granules 151 of the flavor generating member 15, thereby making it possible for the smoker to enjoy the flavoring component thus generated.
  • Such an air flow path can be made of at least one groove provided in an outer circumferential surface of the carbonaceous cylinder formed material along the longitudinal axis of the cylindrical member 11 or at least one through hole made through the carbonaceous cylinder formed material along the longitudinal axis of the cylindrical member 11.
  • FIG. 1 illustrates such flow paths, that is, a central through hole 131 made through the heat generating member 13 in its axial direction and a plurality of through holes (through holes 132 and 133 are shown in FIG. 1) arranged around the through hole 131.
  • the type and composition of the carbonaceous material but also the shape (the depth of each groove and the diameter of each through hole) and the number of air flow paths in the heat generating member 13 have an effect on the combustion characteristics such as the ignition time of the heat generating member, combustion speed, combustion temperature and the amount of product created by the combustion.
  • an ignition time characteristic it is required to be such an ignition time that can be expected without a feeling of any significant difference by the user from the ignition of an ordinary cigarette (within about 1 second.)
  • an ignition time for the carbonaceous material of within about 1.5 seconds can be achieved by selecting such a composition of the carbonaceous material that the heat conductivity at room temperature (about 22°C) is 1.0 W/m ⁇ K or less.
  • the heat generating member is made of a carbon material composition that contains the substantially nonporous inorganic filler material in an amount of 15 to 65% by mass (the balance is carbon), the amount of carbon is substantially reduced.
  • the amount of combustion product especially, carbon monoxide
  • the amount of combustion that is, the number of puffs can be decreased, and therefore, the total amount of combustion product can be reduced.
  • the substantially nonporous inorganic filler material 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 heat generating member 13 heats the flavor generating member 15 disposed adjacent to the heat generating member and makes it vaporize the flavor to be released.
  • the heat generating member 13 is surrounded by a heat-resisting enclosing member 14 and it is inserted and fixed in the cylindrical member 11.
  • a flavor supplying member 18 can be provided on a downstream side of the flavor generating member 15.
  • the flavor supplying member 18 can carry various types of flavors or the like when the flavor needs further characterization by adding other flavors to the flavor component generated from the flavor generating member 15, or when it is preferable that the various types of flavors should not be exposed to a high temperature.
  • the flavor supplying member 18 can be made of tobacco or reconstituted tobacco, or paper that carries a flavor, or a carrier such as an non-woven fabric, depending upon the purpose. Further, it is possible that the flavor supplying member 18 is provided in the form of a molded material containing a flavor.
  • a filter 171 for tobacco which is generally employed in the art, can be provided.
  • a low filtration efficiency filter having a filtration efficiency of 20% or less or a hollow filter can be used.
  • a plurality of ventilation holes VH can be made in the mouthend portion 17 to pierce through the heat insulating member 12 and cylindrical member 11 at desired positions (usually in a circumferential direction of the mouthend portion 17) in accordance with necessity in order to adjust the suction amount and suction pressure.
  • the flavor generating member 15 and the flavor supplying member 18 are disposed to be in direct contact with each other; however it is preferable that a gap portion 19 be provided between these members as shown in FIG. 1.
  • the gap portion 19 serves to promote the cooling of the aerosol or flavor generated from the flavor generating member 15, thereby making it possible to reduce the loss caused by the condensation of the aerosol or flavor in the flavor supplying member 18 and the mouthend portion 19.
  • the volume of the gap portion 19 can be arbitrarily set in accordance with the purpose.
  • an air permeable member 16b similar to the air permeable member 16a is provided on a downstream side of the flavor generating member 15 so that the granules 151 do not move.
  • the granules 151 are filled in the cylindrical member 11 in its closest packing state. If the granules 151 are loosely put in the cylinder member, they are unevenly distributed in the member while being used, and thus the fluid paths formed between granules 151 become uneven, thereby deteriorating the uniformity of the amount of flavor delivered. For this reason, it is preferable that the granules be filled in the cylindrical member at the closest packing density so that the initial filled state can be maintained.
  • the closest packing is meant to be a state in which the granules are densely filled in the member by vibration or tapping, etc.
  • the filled length (L) of the granules 151 filled at the closes packing state and the inner diameter (D) of the cylindrical member 11 be set so that the ratio between them (L/D) is 2 to 4.
  • the ratio is smaller than 2
  • the ratio is larger than 4
  • there is such a tendency that the amount of flavor delivered is easily decreased due to the condensation and deposition of the component in the flavor generating member 15.
  • the uniformity of the deliver of the flavor is deteriorated.
  • the filled length (L) is preferably set in a range of about 14 to 32 mm.
  • the size of the granules 151 is preferably set such that the ratio between the major diameter (d) and the inner diameter (D) of the cylindrical member 11 (D/d) is 3.5 to 16, or more preferably 4 to 15.
  • the ratio is smaller than 4, the heat capacity per granule 151 increases, and therefore there is a tendency that the amount of flavor delivered at the initial stage of the smoking is decreased.
  • the ratio is larger than 15, the suction resistance is increased, and therefore the suction tends to become difficult.
  • the major diameter of the granules 151 should preferably be set in a range of about 2.0 to 0.5 mm.
  • the major diameter of the granules is defined as the largest diameter in the axial direction or radial direction.
  • FIG. 2A and FIG. 2B show the results of the DSC analysis for the case where calcium carbonate having a BET specific surface area of 1 m 2 /g was employed as the nonporous inorganic filler material and mixed with a flavoring substance (FIG. 2A) and for the case where alumina having a specific surface area of 120 m 2 /g was employed as the porous inorganic filler material and mixed with the same flavoring substance at the same ratio (FIG. 2B).
  • the nonporous inorganic filler material is used, the endothermic peak caused by the vaporization of the flavoring substance appears only once as shown in FIG. 2A.
  • a smoking article having the structure shown in FIG. 1 was manufactured with the following specifications.
  • the thus prepared smoking article was smoked by an automatic smoking machine in such a manner of taking a puff by a volume of 50 mL/2 seconds at intervals of 30 seconds.
  • FIG. 3 shows the results of the measurement of the amount of the flavoring substance collected in each puff. Further, the uniformity index (explained latter) regarding the release of the flavor component of the smoking article of this embodiment was 0.79. The total amount of the flavoring substance colleted was about 11 mg.
  • the thus prepared smoking article was smoked by the automatic smoking machine in such a manner of taking a puff by a volume of 50 mL/2 seconds at intervals of 30 seconds.
  • FIG. 4 shows the results of the measurement of the amount of the flavoring substance collected in each puff. Further, the uniformity index of the smoking article of this Example was as high as 0.81. However, with the L/D value set at a large value, the total amount of the flavoring substance colleted was lower than the previous Example, and was about 7 mg.
  • the uniformity index indicates a better condition as its value is closer to 1.
  • FIG. 5 shows the results in which the quantity of heat flowing from the carbon formed heat generating member to the flavor generating member in the smoking article of Example 1 was plotted for each puff.
  • the grounds for setting the range of the evaluation of the uniformity index to 2nd to 11th puffs were that they satisfy the conditions that the amount of heat flowing to the flavor generating member is 50% or more of its maximum (which can be obtained at, usually, 5th puff).
  • Example 1 A smoking article similar to that of Example 1 except that the content of calcium carbonate in the heat generating member was set to 40% by mass, and the thus prepared smoking article was subjected to a similar smoking process. The results indicated that the amount of carbon monoxide generated was reduced to 55% of that of Example 1.
  • a flavor generating material was prepared from a cut sheet medium made of pulp and tobacco-based material, as disclosed in Jpn. Pat. Appln. KOKAI Publication No. 6-46818, and a flavoring substance (for example, glycerin) contained in the medium at 40% by mass, and filled to have a length of about 30 mm.
  • a smoking article similar to that of Example 2 was manufactured.
  • Example 6 shows the results of the measurement of the amount of the flavoring substance collected in each puff.
  • the total amount of the flavor material collected was about 13 mg, which was not very much different from that of Example 1, whereas the uniformity index was as low as 0.31.
  • the smoking article was disassembled after smoked and examined. It was found that some cut sheet was incinerated and lost by combustion.
  • the smoking articles of Examples 1 and 2 and that of Comparative Example 1 were actually smoked by a specially trained smoking tasting expert and compared with each other.
  • the results of the evaluation indicated that the smoking articles of Examples 1 and 2 of the present invention had a stable amount of flavored smoke in each puff, and the amount of flavor did not decrease in the later half of the smoking, thus making it possible to maintain a good amount of smoke even in a later stage of the smoking.
  • the results indicated that a specific change in taste, which was caused by combustion of the flavor generating member, was noticed in a later stage of the smoking.
  • a smoking article that can, with a simple structure, deliver a stable amount of flavor per puff while it is smoked by a user, thereby making it possible for the user to enjoy smoking without feeling a stress caused by an uneven change in amount of smoke or flavor.
EP02806062A 2001-12-28 2002-12-18 Rauchvorrichtung Expired - Lifetime EP1468618B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2001401522 2001-12-28
JP2001401522 2001-12-28
PCT/JP2002/013232 WO2003056949A1 (fr) 2001-12-28 2002-12-18 Article pour fumeur

Publications (3)

Publication Number Publication Date
EP1468618A1 true EP1468618A1 (de) 2004-10-20
EP1468618A4 EP1468618A4 (de) 2006-12-27
EP1468618B1 EP1468618B1 (de) 2008-07-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP02806062A Expired - Lifetime EP1468618B1 (de) 2001-12-28 2002-12-18 Rauchvorrichtung

Country Status (15)

Country Link
US (1) US20040226568A1 (de)
EP (1) EP1468618B1 (de)
JP (1) JP3974898B2 (de)
KR (1) KR100587849B1 (de)
CN (1) CN1286409C (de)
AT (1) ATE400192T1 (de)
AU (1) AU2002357599A1 (de)
CA (1) CA2471732C (de)
DE (1) DE60227562D1 (de)
DK (1) DK1468618T3 (de)
ES (1) ES2305353T3 (de)
PT (1) PT1468618E (de)
RU (1) RU2268631C2 (de)
TW (1) TWI226821B (de)
WO (1) WO2003056949A1 (de)

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US11672276B2 (en) 2016-11-02 2023-06-13 British American Tobacco (Investments) Limited Aerosol provision article
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AU2002357599A1 (en) 2003-07-24
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ATE400192T1 (de) 2008-07-15
KR20040066928A (ko) 2004-07-27
DE60227562D1 (de) 2008-08-21
JPWO2003056949A1 (ja) 2005-05-12
CA2471732C (en) 2008-11-18
US20040226568A1 (en) 2004-11-18
ES2305353T3 (es) 2008-11-01
CN1607911A (zh) 2005-04-20
RU2004123208A (ru) 2005-03-10
CA2471732A1 (en) 2003-07-17
RU2268631C2 (ru) 2006-01-27
TWI226821B (en) 2005-01-21
CN1286409C (zh) 2006-11-29
EP1468618B1 (de) 2008-07-09

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