JPH0390162A - smoking articles - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a smoking article that generates an aerosol similar to cigarette smoke and that contains products of incomplete combustion or thermal decomposition of less than the minimum type. It is.

[Conventional technology]

Although many smoking articles have been proposed over the years, particularly over the last few decades, none of these products have achieved industrial success.

Despite decades of interest and effort, there are still no smoking articles commercially available that provide the effects and benefits associated with conventional cigarette smoking without providing significant amounts of incomplete combustion and pyrolysis products. do not have.

[Problem that the invention seeks to solve]

In a smoking article having a fuel member and an aerosol generating means, there is a need for a means for reducing or retarding the radial flow of heat from the fuel member and for directing heat from the fuel member to the aerosol generating means. becomes. Smoking articles can also be manufactured during initial product use and use without significant thermal separation of aerosol-forming materials and without the presence of significant thermal decomposition or incomplete combustion products, preferably without significant sidestream smoke. It is necessary to be able to generate significant amounts of aerosol over both lifetimes. The smoking article according to the present invention can provide the user with the sensation and effect of smoking a cigarette without burning tobacco.

SUMMARY OF THE INVENTION These and other advantages are achieved in accordance with the present invention by providing a combustible fuel member, preferably of carbonaceous material, in a physical heat transfer relationship with the fuel member. This is achieved by an elongated cigarette-shaped smoking article used in combination with a separate aerosol generating means.

More specifically, the present invention comprises (a) a fuel member and (b)
) an aerosol generating means separate from the fuel member having an aerosol-forming material disposed in heat transfer exchange relationship with the fuel member to receive heat from the fuel member;
c) A smoking device comprising: an insulating member made of inorganic fiber, having a thickness of at least 0.5 mm, surrounding at least a portion of the fuel member, and further surrounded by paper. article, thereby achieving the initial effect.

When ignited, the fuel element generates heat that is used to vaporize the aerosol forming material in the aerosol generating means. These volatile substances are then sucked out (
During puffing, the smoke is drawn toward the mouth end and is inhaled into the user's mouth in the same way as conventional cigarette smoke.

Preferably, the fuel element is less than 30 mm long, more preferably less than 15 mm long, and contains at least 0.5 g/
cc density and provided with one or more longitudinal passages. Advantageously, the aerosol generating means has a thermally stable support containing one or more aerosol-forming substances. Preferably, the heat exchange relationship between the fuel element and the aerosol generating means is achieved by providing a heat transfer element, such as a metal foil, which efficiently transfers heat from the burning fuel element to the aerosol generating means. Ru. The heat transfer member preferably contacts the fuel member and the aerosol generating means around at least a portion of its circumferential surface. Furthermore, at least a portion of the fuel element is preferably provided with a peripheral insulation member, such as a jacket of insulating fabric, which jacket is preferably resilient and has a thickness of at least 0.5 mm and has a radius of It helps to retain heat and direct it away from the fuel element and towards the aerosol generating means, as well as reducing directional heat loss. The heat insulating member preferably covers at least one of the fuel members.
and advantageously at least a portion of the aerosol generating means.

The preferred fuel element is relatively short so that the hot burning fire cone is always in close proximity to the aerosol generating means to maximize heat transfer thereto and particularly in embodiments provided with a heat transfer element. maximizes the aerosol generation obtained. The preferred use of a relatively short, low mass support or carrier as the aerosol generation means in close proximity to the short fuel element further increases aerosol generation by minimizing the heat sink of the support. Because the aerosol-forming material is physically separated from the fuel component, it is exposed to significantly lower temperatures than those present in the burning fire zone, thereby minimizing the potential for thermal decomposition of the aerosol-forming material. let More particularly preferably, the use of a carbonaceous fuel component that is substantially free of volatile organic substances eliminates the presence of significant thermal decomposition or incomplete combustion products, as well as eliminates significant amounts of sidestream smoke. Occurrence is eliminated.

Smoking articles of the invention generally include a mouthpiece provided with means, such as a longitudinal passageway, for delivering volatile substances generated by the aerosol generating means to the user.

Advantageously, the article has the same overall dimensions as a conventional cigarette, so that the mouthpiece and the aerosol delivery means generally extend over more than half the length of the article. Alternatively, the fuel member and aerosol generating means can be constructed without a built-in tip or aerosol delivery means for use with a separate disposable or reusable tip.

Additionally, the smoking articles of the present invention may also include a filler or plug of vine tobacco used to add tobacco flavoring to the aerosol. Preferably, the tobacco is placed at the mouth end of the aerosol generating means or may also be mixed with a carrier for the aerosol-forming substance. Additionally, flavoring agents can be incorporated into the article to flavor the aerosol delivered to the user.

Preferred embodiments of the present invention provide the first three puffs (pu
ff) at least 0.6 mg of aerosol can be delivered. [FTC smoking conditions consisted of 2 second puffs (total volume 35-) separated by 58 seconds of smoldering time]. More preferred embodiments of the invention may deliver 15 mg or more of aerosol in the first three doses. Particularly preferably embodiments of the invention are capable of delivering 3 mg or more of aerosol in the first three puffs when smoked under FTC smoking conditions. Additionally, preferred embodiments of the present invention provide an average of at least about 0.8 mg of wet whole particulate material per serving for at least about 6, preferably at least about 10, doses under FTC smoking conditions.

Furthermore, the smoking article of the present invention is a chemically simple aerosol consisting essentially of carbon oxides, air, water, a desired flavoring agent or other desired volatile substance, and trace amounts of other substances. can be supplied. Preferably, the aerosol does not have significant mutagenic activity as determined by the Ames test described below. Additionally, the article can be substantially ash-free so that there is no need for the user to remove the ash during use.

As used herein, for descriptive purposes only, the term "aerosol" refers to vapors, gases, particles, etc., both visible and invisible, particularly from burning fuel components. It is defined to include components that are perceived by the user as "smoke" generated when heat acts on materials contained within the aerosol generating means or other articles. The term "aerosol" thus defined also encompasses volatile flavoring agents and/or pharmaceutical or bioactive agents, whether or not they generate a visible aerosol.

As used herein, the term "heat transfer exchange relationship" refers to a relationship between the aerosol generating means and the fuel member such that heat is transferred from the burning fuel member to the aerosol generating means over substantially the entire combustion period of the fuel member. Defined as physical location. A heat transfer exchange relationship is achieved by placing the aerosol generating means in contact with the fuel member and in close proximity to the burning portion of the fuel member and/or by transferring heat from the burning fuel member to the aerosol generating means. This is achieved by using members. Preferably, both of these heat transfer methods are used.

As used herein, the term "carbonaceous" means consisting primarily of carbon.

As used herein, the term "thermal insulation means" means any material that primarily acts as a thermal insulator. Preferably, these materials do not burn in use, but include slow burning materials such as carbon, as well as low temperature grade glass fibers, which fuse in use. These insulation materials are g
/ca 1 (sec) (cm) ('C/am) of less than about 0.05, preferably less than about 0.02, particularly preferably less than about 0.005 [Hacks Chemical Dictionary, Page 34 (4th edition,
1969) and Langes Handbook of Chemistry Vol. 10, pp. 272-274 (11th edition, 19
73)].

[Embodiments of the Invention] Hereinafter, examples of the smoking article of the present invention will be described in more detail with reference to the accompanying drawings. Figures 1 to 7 show reference examples, Figures 8 and 9 show examples of the present invention, and Figures 1 to 7 show that a smoking article without a heat insulating member must be satisfied as a smoking article. This example shows that the conditions are met. It will be clear to those skilled in the art that the insulation elements according to the invention can be applied to these reference examples.

The reference example shown in FIG. 1, preferably having the diameter of a conventional cigarette, comprises a short combustible carbonaceous fuel element 1o, an adjacent aerosol generating means 12, a foil-lined paper tube 14, The tube is the mouthpiece 15 of the article.
form. In this embodiment, the fuel element 10 is "blowpipe" charcoal, i.e. carbonized wood;
It is provided with five longitudinally extending holes 16 (see FIG. 1A). The fuel member 10 is approximately 20 mm long and can be wrapped in tobacco paper if desired to improve ignition of the charcoal fuel. This paper can be treated with known combustion additives.

The aerosol generating means 12 comprises a plurality of glass beads 20 coated with an aerosol-forming substance, such as glycerin. The glass beads are held in place by porous disks 22, which may be made of cellulose acetate. The disc may be provided with a series of circumferential grooves 24 to form a passageway between the disc and the foil-lined tube 14.

A lined paper tube 14 forming the mouthpiece of the article surrounds the aerosol generating means 12 and the non-ignited rear end of the fuel member 10; 15, an aerosol supply passage 26 is formed between the two.

The presence of the lined tube 14 indicates that the fuel member 1
0 to the aerosol generating means 12 and increasing heat transfer to the aerosol generating means. The foil also helps extinguish the cone. If only a small amount of unburned fuel remains, the heat loss through the foil acts as a heat drop and helps extinguish the cone.

The foil used for this article is typically 0.35 mil thick (
0,0089 mm), although the thickness and/or type of metal used can be varied to achieve the desired degree of heat transfer. Other types of thermally conductive members can also be used, such as vine graphoil available from Union Carbide.

Additionally, the reference article shown in FIG. 1 optionally includes chunks or plugs of tobacco 28 to impart flavoring to the aerosol. This tobacco filling 28 is the first
It can be installed at the mouth end of the disc 22 as shown in the figure, or it can be installed between the glass beads 20 and the disc 22.

Furthermore, it can also be installed in the passageway 26 at a distance from the aerosol generating means 12. In the reference example shown in FIG. 2, the short fuel member 10 has a length of approximately 20 mm.
This is a compressed carbon rod or plug in which an axial hole 16 is provided. Alternatively, the fuel may be formed from carbonized fibers, preferably with axial passages corresponding to the holes 16. In this embodiment, the aerosol generating means 12 comprises a thermally stable, thermally conductive carbonaceous support 30, such as a plug of porous carbon, which is impregnated with an aerosol-forming substance. This support is optionally provided with an axial passage 32 as shown in FIG. Additionally, this embodiment includes a mass of tobacco 28, which is preferably placed at the oral end of the support 30. For cosmetic purposes, the article further includes an optional high porosity cellulose acetate filter 34 with a circumferential groove 36 forming a passageway for the aerosol-forming material between the filter 34 and the foil tube 14. can do. As shown in FIG. 2A, if desired, the ignition end 11 of the fuel member can be tapered to improve ignitability.

The reference example shown in FIG. 3 comprises a short combustible carbonaceous fuel member 10 connected to the aerosol generating means 12 by a heat transfer rod 99 and a lined paper tube 14, which paper tube is also attached to the mouth side of the article. The end 15 is reached. In this embodiment, the fuel element 1o may be blowpipe charcoal or compressed or extruded carbon rods or plugs or other carbonaceous fuel sources.

The aerosol generating means 12 comprises a thermally stable carbonaceous support 30, such as a porous carbon plug, which is impregnated with an aerosol-forming substance. In this specific example, fuel member 1
0 and the support body 30 has a void space 97. The portion of the foil lined tube 14 surrounding the void space includes a plurality of circumferential holes 100 to allow sufficient air to enter the void space to create a sufficient pressure drop.

As shown in FIGS. 3 and 3A, the heat transfer means includes a heat transfer rod 99 and a lined tube 14. As shown in FIGS. The heat transfer rod 99 is preferably made of aluminum and includes at least one, preferably 2 to 5, circumferential grooves 96 to allow air to pass through the support. The article of FIG. 3 has the advantage of containing fewer carbon oxidation products because the air introduced into the void space 97 is not drawn through the burning fuel.

The reference example shown in FIG. 4 includes a fibrous carbon fuel member 10, such as carbonized cotton or rayon.

The fuel element comprises a single axial bore 16, and the support 38 of the aerosol generating means is thermally stable granular carbon. A mass of tobacco 28 is placed directly behind the support. This article is provided with a cellulose acetate tube 40 in place of the base-lined tube in the previous embodiment. The tube 40 comprises an annular section 42 of cellulose acetate bundle surrounding an optional plastic (eg polypropylene) tube 44. Mouth side end 1 of this member
At 5 there is a low efficiency cellulose acetate filter plug 45. The entire length of the article is wrapped in tobacco paper 46. A cork or white ink coating 48 can be used on the mouth end to simulate a chip. A strip of foil 50 is placed inside the paper towards the fuel end of the article. This band preferably extends from the rear of the fuel member to the mouth end of the tobacco filler 28. This can be integrated with the paper, or it can be a separate piece applied before wrapping with paper.

The reference example in FIG. 5 is the same as the reference example in FIG. In this reference example, the near-0 sol generating means 12 is formed by an aluminum macrocapsule 52, which is filled with a granular support or a mixture of a granular support 54 and tobacco 56 as shown. Macro capsule 52 at end 58.6
crimp at zero to encapsulate the material and prevent migration of the aerosol-forming material. crimped end 58 at the fuel end
preferably contacts the rear end of the fuel member to impart heat transfer properties. Additionally, the void space 62 created by the end 58 also serves to prevent migration of aerosol-forming material into the fuel member. Longitudinal passages 59 and 61 are provided to allow the passage of air and aerosol-forming substances. The macrocapsule 52 and the fuel element 10 are integrated as shown by conventional cigarette paper 47 or by perforated ceramic paper or by a foil strip. When using cigarette paper,
The band 64 near the trailing edge of the fuel must be printed or treated with sodium silicate or other known material to extinguish paper. The entire length of the article is wrapped in conventional tobacco wrapping paper 46.

FIG. 6 shows another example with a compressed carbon fuel plug 10. In this embodiment, the fuel member has a tapered ignition end 11 to facilitate ignition;
A tapered rear end 9 is provided to facilitate installation into a tubular wrapping foil 66. Adjacent to the rear end of the fuel member is an aluminum disk 68 having a central hole 70. A second aluminum disc 72 with holes 74 as required is provided at the inner end of the aerosol generating means 12. In between is a particulate matter zone 76 and a tobacco zone 7. A wrapper foil 66 for mounting the fuel element extends beyond the second aluminum disk 72. This embodiment also includes a hollow cellulose acetate rod 42 with an internal polypropylene tube 44 and a cellulose acetate filter plug 45. The entire length of the article is preferably wrapped in tobacco wrapping paper 46.

The reference example shown in FIG. 7 illustrates the use of a support 80 embedded within a large cavity 82 in the fuel element 10. In this reference example, the fuel member is preferably formed from extruded carbon and the support 80 is generally a relatively rigid porous material.

The entire length of the article is wrapped in conventional tobacco wrapping paper 46.

This embodiment further includes a strip-shaped foil 84, and the fuel member 10
can be connected to the cellulose acetate tube 40 and act to extinguish the fuel.

The embodiments shown in FIGS. 8 and 9 include a non-combustible heat insulating jacket 86 around the fuel member 70 to insulate the fuel member and concentrate heat on the fuel member. acts to reduce the ignition ability of the

In the embodiment shown in FIG. 8, both the fuel member 10 and the support 30 are disposed within an annular jacket or tube 86 of insulating fibers, such as ceramic (eg, glass) fibers. Instead of ceramic fibers, non-combustible carbon or graphite fibers can also be used. Preferably, fuel member 10 is an extruded carbon plug having a hole 16. In the illustrated embodiment, the ignition end 1
1 extends slightly beyond the end of jacket 86 to facilitate ignition. Support 30 is a solid porous carbon material, although other types of supports can be used. The support and the rear of the fuel element are surrounded by a piece of aluminum foil 87.

As shown, the jacketed fuel member/support unit is connected to a mouthpiece, such as an elongated cellulose acetate tube 40 as shown, by wrapping it in conventional cigarette paper 46. Jacket 86 extends to the mouth end of support 30, but cellulose acetate rod 42 could be substituted.

In the embodiment shown in FIG. 9, aluminum macrocapsules 52 of the type shown in FIG. 5 are used to encapsulate particulate support 52 and tobacco 56. This macrocapsule is preferably disposed entirely within the insulation jacket 86. Furthermore, the ignition end 11 of the fuel member l○ does not protrude from the front end of the jacket 86. Preferably, the macrocapsule and the rear part of the fuel element are surrounded by a piece of aluminum foil in a manner similar to that in FIG.

Alternatively, the aluminum foil 52 surrounding the support is crimped only at the mouth end. In this embodiment, the rear end of the fuel element can be inserted into one end of the foil, and the polypropylene tube can be placed around or in contact with the mouth end of the foil. I can do it.

The entire assembly is wrapped in fiberglass to the diameter of a conventional cigarette.

When ignited in any of the above embodiments, the fuel member burns and generates heat, which is used to vaporize the aerosol-forming substance present in the aerosol generating means. These volatile substances are then drawn towards the oral end, especially during inhalation, and are inhaled into the user's mouth in the same way as conventional cigarette smoke.

The fuel element is preferably relatively short so that the burning hot cone is always in close proximity to the aerosol generating means, maximizing heat transfer to the aerosol generating means, especially when using suitable heat transfer elements. maximize the occurrence of

Additionally, preferred insulation members tend to directly block heat and increase the amount of heat transferred to the aerosol-forming material by concentrating this heat toward the central core of the article.

Because the aerosol-forming material is physically separated from the fuel component, it is exposed to significantly lower temperatures than in the combustion cone. This minimizes the possibility of thermal decomposition of the aerosol former. Furthermore, this results in the generation of aerosols upon inhalation, but little or no aerosol generation upon smoldering. Additionally, the use of a suitable carbonaceous fuel component and physically separate aerosol generation means eliminates the presence of significant pyrolysis or incomplete combustion products and prevents the generation of significant sidestream smoke. be done.

Due to the small size and combustion characteristics of the preferred carbonaceous fuel element used in the present invention, the fuel element generally begins to burn within a few seconds over its entire exposed length.

Thus, the portion of the fuel member adjacent to the aerosol generating means heats up rapidly, significantly increasing heat transfer to the aerosol generating means, particularly for initial and intermediate draw. Because the preferred fuel member is short, there is never a long section of non-combustible fuel to act as a heat drop as is common in conventional thermal aerosol articles. Heat transfer and therefore aerosol delivery is also enhanced by the use of holes through the fuel element to absorb hot air to the aerosol generator, particularly during inhalation.

In a preferred embodiment of the invention, the short carbonaceous fuel element, the heat transfer element, the insulation means and the passageway in the fuel element cooperate with an aerosol generating means to generate a significant amount of aerosol on each inhalation. form. Due to the close proximity of the fire cone to the aerosol generator, after several doses, together with the insulation means, it results in a high heat supply during the inhalation and during the relatively long smoldering period between each inhalation.

Without being bound by theory, it is believed that the aerosol generating means is maintained at a relatively high temperature between each draw, and that the additional heat significantly increased by the holes in the fuel element delivered during each draw is primarily responsible for aerosol formation. It is thought to be used to vaporize substances. This increased heat transfer makes the use of available fuel energy more efficient and helps reduce the amount of fuel needed and deliver the aerosol faster. Furthermore, the heat transfer used in the present invention appears to reduce the combustion temperature of carbon fuels, which further reduces the CO/
It is believed to reduce the COa ratio. [For example, G. Hage, General Inorganic Chemistry, Vol.
92 pages (John Wiley & Sons, 196
9)].

Furthermore, by appropriately selecting the fuel component, insulation jacket, wrapping paper, and heat transfer means, the combustion characteristics of the fuel source can be adjusted. This gives the possibility to adjust the heat transfer to the aerosol generator, varying the number of inhalations and/or the amount of aerosol delivered to the user.

Generally, the combustible fuel members used in practicing the present invention are less than about 30 mm in length. Advantageously, the fuel member has a length of about 20 mm or less, preferably about 15 m.
m or less. Advantageously, the diameter of the fuel element is approximately 3-8 mm, preferably approximately 4-5 mm. The density of the fuel component used here is about 0.5 to about 1.5 g.
/cc range. Preferably the density is 0.7 g/
cc, more preferably greater than 0.8 g/cc. Preferably, the fuel member is provided with one or more longitudinally extending holes, such as holes 11 shown in FIGS. 1-5. These holes provide porosity and increase early morning heat transfer to the support by increasing the amount of hot gas reaching the support.

Preferred fuel members for use herein are formed primarily of carbonaceous materials. The carbonaceous fuel member preferably has a length of about 5 to 1
5 mm, more preferably about 8-12 mm. A carbonaceous fuel member having these properties is sufficient to deliver fuel over at least about 7 to 10 puffs, a typical version typically obtained by smoking a conventional cigarette under FTC conditions.

Preferably, the carbon content of such a fuel component is at least 60-70% by weight, particularly preferably at least about 80% by weight.
% by weight or more.

Excellent results have been obtained with fuel components having a carbon content of about 85% by weight or greater. High carbon content fuels exhibit minimal pyrolysis and incomplete combustion products, produce little or no visible sidestream smoke, and produce minimal ash; It is suitable because it has a high heat capacity.

However, lower carbon contents, e.g.
A fuel component of 5% by weight is also within the scope of the present invention, especially when non-combustible inert fillers are used.

Additionally, although not preferred, other fuel materials may be used, such as tobacco, tobacco substitutes, etc., provided they generate sufficient heat and transfer this to the aerosol generating means to achieve the desired results as described above. level aerosol is generated from the aerosol-forming material. The density of the fuel used is greater than about 0.5 Z/CC, preferably about 0.7
g/cc, which is higher than the density commonly used in conventional smoking articles. If such other materials are used, the carbon in the fuel is preferably at least about 20-40% by weight, more preferably at least about 50% by weight, and particularly preferably at least about 65-70% by weight.
It is preferable to include it in an amount of % by weight, with the remainder being a binder,
Other fuel components include combustion modifiers, moisture, etc.

The carbonaceous material used in or as the preferred fuel can be obtained from virtually any carbon source, including a number known to those skilled in the art. Preferably, the carbonaceous material is obtained by pyrolysis or carbonization of cellulosic materials, such as wood, cotton, rayon, tobacco, willow, paper, etc., but carbonaceous materials from other sources can also be used.

In most cases, the carbonaceous fuel component should be ignited by a conventional cigarette lighter without the use of an oxidizing agent. This type of combustion characteristic is generally from about 400 to about 1000°C, preferably about 50°C, in an inert atmosphere or under reduced pressure.
It can be obtained from cellulosic materials that have been previously pyrolyzed at temperatures of 0 to about 950<0>C. The pyrolysis time does not appear to be critical, provided that the core temperature of the pyrolysate reaches the above temperature range for at least several minutes.

However, slow pyrolysis, which gradually increases the temperature over several hours, appears to produce a more uniform material with a higher carbon yield.

Although often undesirable, carbonaceous fuel components that require the addition of an oxidizing agent to be ignitable by a cigarette lighter are also within the scope of this invention, as well as the addition of glow suppressants or other types of fuel components. Also included are carbonaceous materials that require the use of combustion modifiers. Combustion modifiers of this type are disclosed in numerous patents and literature and are known to those skilled in the art.

Particularly preferred carbonaceous fuel components used in practicing the present invention are substantially free of volatile organic materials. This means that the fuel component is heavily impregnated with or mixed with volatile organic substances, such as volatile aerosol formers or flavoring agents, which will decompose in the burning fuel. It means not to. however,
A small amount of water may be present which is naturally adsorbed by the fuel. Similarly, a small amount of aerosol-forming material may migrate from the aerosol generating means and thus be present in the fuel element.

The preferred carbonaceous fuel component is a compressed or extruded carbon material made from carbon and a binder by conventional compression molding or extrusion techniques. The preferred activated carbon for this type of fuel component is PCB-G and the preferred non-activated carbon is PxC, both available from Carbon Carbon Corporation, Fitzburg, Pennsylvania. Other suitable carbons for compression molding and/or extrusion are made from pyrolyzed cotton or pyrolyzed paper.

Vine binders used in making fuel components of this type are well known in the art. A preferred binder is sodium carboxymethylcellulose (SCMC), preferably used alone or in combination with materials such as sodium chloride, vermiculite, bentonite, calcium carbonate, and the like. Other useful binders include gums such as guaya gum and methylcellulose and carboxymethylcellulose (C
MC).

A wide range of binder concentrations can be used.

Preferably, the amount of binder is limited to minimize the binder becoming an undesirable combustible component. On the other hand, a sufficient amount of binder must be included to hold the fuel component together during manufacture and use. The amount used therefore depends on the adhesion of the carbon in the fuel component.

If desired, for example, about 650 ml after forming the fuel member.
Pyrolysis at ℃ for 2 hours to convert the binder to carbon,
This makes it possible to form a nearly 100% carbon fuel component.

Furthermore, the fuel component used in the present invention has a fuel component that improves combustion.
Seeds or more additives may also be included, such as up to about 5% by weight of sodium chloride and glow inhibitors to improve smoldering properties.

Furthermore, up to 5% by weight, preferably 1 to 2% by weight, of potassium carbonate can be included to improve ignitability. Additives that improve physical properties such as, for example, viscous kaolin, cerventine, attapulgite, etc. can also be used.

Other carbonaceous fuel components are carbon fiber fuels, which can be made by carbonizing fiber precursors such as cotton, rayon, paper, polyacrylonitrile, and the like. Generally, about 650 to 1000 in an inert atmosphere or under reduced pressure.
℃, preferably about 950℃ for about 30 minutes,
Sufficient to form suitable carbon fibers with good combustion properties. Additionally, combustion modifying additives may be added to these fibrous fuels.

The aerosol generating means used in practicing the invention is physically separate from the fuel component. The term physically separate means that the support, container or chamber containing the aerosol forming material is not mixed with the combusted fuel component or portion thereof. As mentioned above, this arrangement helps reduce or eliminate the thermal decomposition of aerosol-forming materials and the presence of sidestream smoke, although not part of the fuel.
The aerosol generating means is in heat transfer exchange relationship with the fuel member, preferably in contact with or adjacent to the fuel member.

Preferably, the aerosol generating means includes one or more thermally stable materials with one or more aerosol-forming substances. Thermally stable materials used herein are those that can withstand the high temperatures, e.g., 400-600° C., present in the vicinity of the fuel without decomposing or burning. The use of this type of material makes it easy to use aerosols as evidenced by the lack of Ames activity in preferred embodiments.
It appears to act to maintain the "fuming" chemistry. Other aerosol generation means, although not preferred, are also within the scope of the invention, such as thermally destructible microcapsules or solid aerosol-forming materials, provided that they contain enough of a material to closely approximate cigarette smoke. capable of emitting aerosol-forming vapors.

Thermostable materials for use as supports or carriers for aerosol-forming substances are well known to those skilled in the art. Useful supports should be porous and capable of retaining the aerosol-forming compound when not in use and capable of strongly releasing aerosol-forming vapors upon heating by the fuel element.

Useful thermostable materials include, for example, porous carbon, graphite, thermostable adsorbed carbons such as activated or non-activated carbon. Other suitable materials include inorganic solids such as ceramics, glasses, alumina, vermiculite, clays (eg, bentonite), and the like. Presently preferred support materials are carbon felts, fibers and mats, activated carbon, and porous carbons such as hand-built PC-25 and PG-60 from Union Carbide and SQL carbon available from Calvon.

Depending on the particulate aerosol active means used here, its composition and shape are generally selected from granular, fibrous, porous blocks, solid blocks with one or more axial passages, etc. be able to. The support, especially the granular support, can be placed in a container preferably formed from metal foil.

The aerosol generating means used in the present invention generally extends no more than about 60 mm, preferably about 3 mm, from the ignition end of the fuel member.
) n+m or less, particularly preferably at a position of 15 mm. The aerosol generating means has a length of about 2 to about 60 mm, preferably about 5 to 40 mm, particularly preferably about 20 to 35 mm.
It can vary in the range of mm. If a non-particulate support is used, it may be provided with one or more holes to increase the surface area of the support and to increase air flow and heat transfer.

The F0 sol-forming material used in the present invention must be capable of forming an aerosol at the temperature present in the aerosol generating means when heated by the combusting fuel component. Preferably, such materials are composed of carbon, hydrogen and oxygen, but may also include other materials. Aerosol-forming substances can be solid, semi-solid or liquid. The boiling point of this substance and/or mixture of substances ranges up to about 500°C. Substances with these properties include polyhydric alcohols such as glycerin and propylene glycol and aliphatic esters of mono-, di- or poly-carboxylic acids;
Examples include methyl stearate, dodecanedioate, dimethyltetradodecanedioate, and the like.

Preferably, the aerosol-forming material comprises a mixture of a high boiling point, low vapor pressure material and a low boiling point, high vapor pressure material. That is, in the initial phase, the low boiling point substance provides most of the initial aerosol, while as the temperature in the aerosol generating means increases, the high boiling point substance provides most of the aerosol.

Suitable aerosol-forming substances are polyhydric alcohols or mixtures of polyhydric alcohols. Particularly suitable aerosol-forming substances are selected from glycerin, propylene glycol, triethylene glycol or mixtures thereof.

The aerosol-forming material can be dispersed onto or within the aerosol-generating means at a concentration sufficient to permeate or coat the support, carrier or container. For example, aerosol-forming substances can be applied in full concentration or as dilute solutions by techniques such as dipping, spraying, and vapor deposition. The solid aerosol-forming component can be mixed with the support and uniformly distributed throughout before shaping.

Although the loading of aerosol-forming material varies from carrier to carrier and from aerosol-forming material to aerosol-forming material, the amount of liquid aerosol-forming material generally ranges from about 20 to about 120 mg, preferably from about 35 to about 120 mg.
It can vary from about 85 mg, particularly preferably from about 45 to about 65 mg.

As much as possible of the aerosol-forming substance carried by the aerosol generating means should be supplied to the user as WTPM. Preferably, about 2% by weight or more, more preferably 15% by weight or more, particularly preferably about 20% by weight or more of the aerosol-forming substance supported on the aerosol generating means is W.
Supplied to users as TPM.

Additionally, the aerosol generating means may include one or more volatile solid agents such as menthol, vanillin, artificial coffee, tobacco extract, nicotine, caffeine, liquor, etc. to impart flavor to the aerosol. You can also. Additionally, any other desired volatile solid or liquid materials may be included.

As noted above, the smoking articles of the present invention may further include a vine tobacco filler or plug used to add tobacco flavoring to the aerosol. Preferably, the tobacco is placed at the mouth end of the aerosol generating means or may also be mixed with a carrier for the aerosol-forming substance. Additionally, flavoring agents can be incorporated into the article to flavor the aerosol delivered to the user.

When using tobacco fillers, hot steam is passed through the bed of tobacco to extract and vaporize the volatile components in the tobacco without the need for tobacco combustion. Thus, the user of this smoking article inhales F0sol containing natural tobacco quality and flavoring without the combustion products produced by conventional cigarettes.

Alternatively, these optional components may be placed in a separate support or chamber between the aerosol generating means and the mouth end, for example in the passageway from the aerosol generating means to the mouth end, or in any tobacco filler. You can also. If desired, these volatile materials can be used in place of some or all of the aerosol-forming materials so that the article delivers materials such as non-aerosol fragrances to a user or the like.

Articles of the type disclosed herein can also be used or modified as drug delivery articles to supply pharmacologically or physiologically active volatile substances such as ephedrine, metaproterenol, terbutaline, and the like.

Heat transfer members suitable for use in practicing the present invention are typically metal foils, such as aluminum foils, with thicknesses varying from about 0.01 mm or less to about 0.1 mm or more. do. The thickness and/or type of heat transfer material can be varied to obtain virtually any desired degree of heat transfer. As shown in the illustrated embodiment, the heat transfer member is preferably a fuel member. and may contact or overlap a portion of the aerosol generating means to form a container enclosing the aerosol-forming substance.

The insulation members used in accordance with the invention generally include inorganic or organic fibers such as glass, alumina, silica, vitreous materials, mineral fibers, carbon, silicon, boron, organic polymers, cellulosic materials, etc., or mixtures of these materials. It consists of things created from. Non-fibrous insulation materials formed into mats, strips, or other shapes can also be used, such as silica F0 gel, perlite, glass, etc. Suitable insulation members are resilient and help mimic the feel of a conventional cigarette. These materials act primarily as insulating jackets, retaining a significant portion of the heat generated by the burning fuel components, and
This is directed to an aerosol generating means. The insulation jacket becomes hot near the burning fuel component, so
This heat can also be transferred further towards the aerosol generating means.

Presently preferred insulating materials include ceramic fibers, such as glass fibers. Two particularly suitable glass fibers are available from Manning Vapor Company of Troy (New York) under the names Maniglas 1000 and Maniglas 1200. Generally, the insulation fibers encase at least a portion of the fuel component and any other desired portions of the article to a final diameter of 7 to 8+n+n. For example, a suitable thickness for the thermal insulation layer is about 0.5-2.5 mm, preferably about 1-2 mm. If possible, for example around 650
Glass fiber materials having a low softening point below 0.degree. C. are preferred.

When the insulation means is Ia fibrous, a barrier means is preferably used at the mouth end of the article. One type of barrier means of this type consists of an annular member of a dense cellulose acetate bundle, in contact with the fibrous insulation means and preferably sealed at the mouth end, for example with an adhesive, to allow air to pass through the bundle. block the flow.

In most embodiments of the invention, the fuel/aerosol generating means combination is attached to a mouthpiece, such as the foil-lined paper or cellulose acetate/plastic tube shown, but the mouthpiece is, for example, in the form of a cigarette holder. It can also be provided separately. This member of the article forms a passageway for conveying the vaporized aerosol-forming substance into the user's mouth. Its length (preferably about 50~
60 mm or more), this also distances the hot cone from the user's mouth and fingers.

Suitable tips should be inert to aerosol-forming substances, have a water- or liquid-resistant inner layer, minimize aerosol loss through condensation or filtration, and be compatible with other components of the article. It should be able to withstand the temperature at the interface between the Suitable tips include the base lined tubes shown in FIGS. 1-3 and the cellulose acetate tubes used in the embodiments of FIGS. 4-9.

Other suitable tips will be apparent to those skilled in the art.

The mouthpiece of the present invention can also optionally include a "filter" tip that is used to give the article the appearance of a conventional filtered cigarette.

Filters of this type include low density cellulose acetate filters and hollow or baffled plastic filters, such as those made from polypropylene. Furthermore, the entire length of the article or a portion thereof can be wrapped in tobacco paper.

The aerosol generated by the preferred article of the invention is chemically simple and is an aerosol carrying substantially air and carbon oxides and the desired flavoring or other desired volatile material, water and trace amounts of other substances. It consists of matter. Wet Whole Particulate Material (WTPM) produced by preferred articles of the invention
has no mutagenic activity as determined by the Ames test.

That is, there is no significant dose-response relationship between the WTPM of the present invention and the number of revertants generated in standard test microorganisms exposed to these substances. According to the proponents of the Ames test, a significant dose-dependent response indicates the presence of a mutagen in the tested article [Ames et al., Mutagenesis Research, Vol. 31, No. 347-36.
4 (1975): Nagasu et al., Mutagenesis Research, Vol. 42, p. 335 (1977)).

[Effects of the Invention] The smoking article according to the present invention is capable of generating a significant amount of aerosol during the initial period of its use and throughout its use life, and exhibits a significant amount of thermal decomposition with significant thermal analysis of the aerosol-forming substances. Alternatively, incomplete combustion does not produce a significant amount of sidestream smoke, and can provide the user with the sensation and effects of cigarette smoking without burning the cigarette.

Yet another advantage derived from the present invention is that there is little ash produced during use compared to the ash produced from conventional cigarettes. Combustion of a suitable carbon fuel source substantially converts it to an oxide of carbon that produces little ash, so that there is no need to dispose of ash while using the article.

[Examples of the Invention] Hereinafter, the smoking article of the present invention will be explained with reference to Examples in order to facilitate understanding of the present invention, but the present invention is not limited thereto. All percentages shown are by weight unless otherwise specified.
It is. All temperatures are expressed in degrees Celsius and are uncorrected.

In all cases, the smoking articles have a diameter of about 7-8 mm, ie the conventional tobacco diameter.

"Yutaka" L-1 A smoking article was prepared according to the reference example shown in FIG. The fuel member was a 25n+m long blow-vib charcoal piece with five 0.040 inch (1.02 mm) longitudinal passages made with a #1K60 drill bit. This charcoal weighed 0.375g.

The fuel component was wrapped in conventional treated tobacco paper. The support is 5
00mg glass beads (average diameter 0.64 inches (1,6
3 mm)) and its surface was coated with 2 drops (approximately 50 mg) of glycerin. When filled into the tube, the support was approximately 6.5 mm long. The foil-lined tube is made of white spirally wound 4.25 mil paper (
0.35 mil (0.00 mm) inside a layer of 0.35 mil (0.00 mm)
89 mm) as a layer of aluminum foil. A short (8 mm) piece of cellulose acetate with 4 grooves around the 0 circumference, which was surrounded by the tube at the rear 5 nv+ of the fuel element, was used to abut the glass bead against the fuel source. In addition, an additional 8 mm long grooved cellulose acetate filter piece was inserted into the mouth end of the tube to give it a conventional cigarette appearance. The total length of the article was approximately 70 mm.

This type of model delivers a significant amount of aerosol when ignited and inhaled, and the amount of aerosol decreases after 2-3 puffs, and
4-9 doses delivered the aerosol well. This type of model typically produces approximately 5-7 mg of wet whole particulate matter (WTPM) when machine smoked under FTC smoking conditions with a 35 mm draw volume, 2 seconds draw time, and 60 seconds draw frequency. Ta.

Four smoking articles having a compressed carbon fuel member with a length of 10 mm and a glass bead support were made.

The fuel member was formed from 90% PCB-G and 10% SCMC with a load of approximately 500 Bond (2273 kg) and was provided with a tapered ignition end as shown in Figure 2A. At the center of each member is one 0.040 inch (
A hole of 1.02 mm) was formed. 3 out of 4 fuel sources
The pieces were wrapped in 8 mm wide conventional tobacco wrapping paper. These fuel elements were inserted approximately 2 mm into a 70 mm long section of the foil lined tube described in Example 1.

Glass beads coated with the amount of glycerin shown in the table below,
A foamed polypropylene filter having a length of 5 mm and having a series of longitudinally extending circumferential grooves was inserted into the open end of the foil-lined tube and brought into contact with the fuel member. A 5 mm long piece of low efficiency cellulose acetate filter was inserted into the oral end of each article. These articles were machine smoked under standard FTC smoking conditions and the wet whole particulate material (WTPM) was collected on a series of Cambridge pads. The results of these experiments are shown in Table 1.

A 400.4mg 40.5mg B, 1 4
．． 5 0.9 0 13.5B”405.6mg
59.4mgl0.2 1.9 0.7 0 1
2゜8C404, Omg 60.6mg 7.6
6.9 0.4 0 14.9D 803.3B
81.0mg 5.9 2.5 3.7 0.9
13.0 The fuel rods in this model were not wrapped in tobacco paper.

B9 Three smoking articles similar to those described in Reference Example 2A were made, but in this case with length 2 of the type described in Example 1.
A 0 mm blow-vib charcoal fuel member was provided. The articles were machine smoked under FTC smoking conditions and the WTPM was collected on a series of Cambridge pads. The results of these tests are shown in Table 1I.
,46,20,612,3F' 404.7mg
63.1mg O, 50,92,23,17,0G
500.0mg 50.0mg O,32,93
,006,2 Ne The fuel rods in this model were not wrapped in tobacco paper.

``Fish'' [-dan A, made four smoking articles as shown in Figure 2,
These were fitted with a 10 mm compressed carbon fuel member with a tapered ignition end as shown in Figure 2A. The fuel components are
90 by adding a load of approximately 5,000 bonds (2,273 kg)
% PCB-G carbon and 10% SCMC. A 0.040 inch (1.02 mm) hole was drilled in the center of the member.

The support for the aerosol-forming material was cut and machined from PC-25, a porous carbon sold by Union Carbide Corporation (Danbury, Conn.). The support in each article was approximately 2.5 mm long and 8 mm in diameter.

This is combined with an average of 27rH of 1:1 propylene glycol.
Filled with glycerin mixture. The rear 2 mm of the fuel element and support were encapsulated with a foil-lined tube tip of the same type used in Example 1. Approximately 100m
A Burley tobacco plug (g) was brought into contact with the oral end of the support. A short piece of baffled polypropylene filter approximately 5-9+nm in length was placed at the mouth end of the foil-lined tube. A 32 mm long cellulose acetate filter with a hollow polypropylene tube in the core was placed between the tobacco and the filter piece. The total length of each item is approximately 78
It was mm.

B. Six additional articles were made substantially as in Example 3A, but this time the support length was increased to 5 mm and a 0.040 inch (1.02 mm) hole was drilled in the support. did. Additionally, these articles did not include cellulose acetate/polypropylene tubing. Approximately 42m
g of a propylene glycol-glycerin mixture was applied to the support. In addition, each approximately 100mg and 150mg
Two barre tobacco plugs were used. The first one was placed against the oral end of the support, and the second one was placed against the filter piece.

Four additional C8 articles were made substantially as in Example 3A, except that approximately 100 mg plugs of flame-cured tobacco containing approximately 6% by weight of ammonium phosphate were substituted for the burley tobacco plugs.

D. Smoking articles from Examples 3A-C were tested using the standard Ames wiping test [Ames et al., Mutagenesis Research, Vol. 31, pp. 347-364 (1975); Nagasu et al., Mutagenesis Research; Volume 42, No. 335
Modified from Page (1,977) and Vol. 113, pp. 173-215 (1983) 1 These samples 3A and 3C were prepared with a suction volume of 35 mm, a suction time of 2 seconds and a suction time of 3
Ten puffs were smoked using a conventional cigarette smoking device using a 0 second puff frequency condition. The smoking article of Example 3B was smoked similarly, but using a 60 second puff frequency. Only one filter pad was used in each group of articles. This produced the wet whole particulate material (WTPM) described below for the groups of articles shown below.

WTPM Reference Example 3A 63.4 mg Reference Example 3B 50.6B Reference Example 3C 69.2 mg The filter pads of each of the above examples containing the collected WTPM were soaked in DMSO for 30 minutes to dissolve the WTPM. Each sample was then diluted to a concentration of 1 mg/- and used as is in the Ames test. Using the method of Nagasu et al., Mutagenesis Research, Vol. 42, pp. 335-342 (1977), a concentration of 1 mg/- of W
TPM was mixed with the S-9 activation system and standard Aims bacteria cells, and cultured at 37°C for 20 minutes. The bacterial strain used in this Ames test was Salmonella typhfmur.
tum, TA98 (Barchiyas et al., Nature, Vol. 264, pp. 624-627 (1976)).

Agar was then added to the mixture and plates were made.

Agar plates were incubated for 2 days at 37°C and the resulting cultures were counted. Four plates were tested for each dilution and the standard deviation of colonies was compared to the pure MSO comparison culture. As shown in Table m, no mutagenic activity was produced by WTPM obtained from all smoking articles tested. This can be confirmed by comparing the average number of revertants per 1 ml of revertants with the average number of revertants obtained from the control (0 μg WTPM/plate). For mutagenic samples, the average number of revertants per plate increases with increasing dose.

Todanbusa Reference example 3A comparison 3 6 9 32 65 98 49.3 51.3 50.5 50.8 S 1.5 53.8 48.3 3.4 9.1 7.0 5.2 5.3 10.1 4.6 Reference example 3B comparison 31.5 3 94.5 26 157.5 18 6 4.

48.3 54, O 9 42,5 3 10,5 7,8 6,3 8,4 4,7 9,3 9,1 Paper crush (continued) Reference example 3C Comparison 0 48.3 5.736
50, 3 9.972
49.0 3.9108
55.3 4.5144 4
3.0 6.4180 42.
3 8.8216 44.3
7.8*Standard Deviation: 7.8*Standard Deviation: L-1 Five smoking articles as shown in FIG. 2 were prepared. Each article had a 10 mm compressed carbon fuel source as described in Example 3A. This fuel element was lined with aluminum foil of the type described in Example 1 and had a length of 70 mm.
3 mm into one end of the tube. A 5 mm long carbon felt support cut from 1/-Yon carbon felt sold by Fiber Materials, Inc. was placed against the fuel source. On average, 97 mg of a 1:1 mixture of glycerin and propylene glycol, about 3 mg of nicotine, and about 0.1 mg of nicotine were added to this support.
Filled with a flavor mixture. A 5 mm long section of compounded tobacco was placed against the oral end of the support.

A 5 mm long piece of cellulose acetate filter was placed at the oral end of the base-lined tube.

These articles were machine smoked under FTC conditions. Aerosols generated from these articles were collected in a single Cambridge pad (133,3 mg WTPM) and 1 m m in DMSO.
gWTPM was diluted to the final concentration and tested for Ames activity as described in Example 3D using each of the following strains; Salmonella typhimurium TA1535.
．． 1537.1538.98 and 100° As shown in Table 2, no mutagenic activity was produced by the WTPM collected from the articles tested.

Todanbusa comparison 5 0 5 1 o.

25 50 6 3 4 7 4 3 2 Comparison 5 0 5 00 25 50 4 3 4 1 3 3 4 Comparison 5 0 5 00 25 50 5 3 2 6 0 9 9 Comparison 5 0 5 00 25 50 1 2 7 2 4 9 0 Table ■ (Continued) Comparison 0 110 25 109 50 105 75 99 100 107 125 108 150 109 * μg WTPM/Plate Supervisor 1 - Once a smoking article as shown in Figure 2 is prepared, a second
A 10 mm long compressed carbon fuel plug having the shape shown in Figure A but containing no tobacco was provided. The fuel member was loaded with a load of approximately 5,000 bonds (2,273 kg) and
0% PCB-G activated carbon and 10% SC as binder
It was made from a mixture with MC. 0.040 for fuel parts
A longitudinal passageway of inch (1.02 mm) was provided. The support was made from union carbide PC-25 and had a length of 1
A porous carbon plug of 0 mrn was used. 0.029 for this
An axial drilling hole of inch (0.74 mm) is provided, and 40
mg of propylene glycol and glycerin (1:1
) filled the mixture. A base-lined tube similar to that in Example 1 surrounded the rear 2 mm of the fuel member to form a mouthpiece. This article did not have a filter tip, but was wrapped in conventional tobacco paper. The total length of the article was 80 mm. The average peak temperature of this article is shown for both "suck" and "smolder" in Figure 10. As shown, the temperature steadily decreased between the rear end and the mouth end of the fuel member. This ensures that there is no unpleasant burning sensation to the user when using the article of the invention.

Fish 1-1 A smoking article was prepared according to the reference example shown in FIG. The fuel member was a blow pipe charcoal piece with a length of 19 mm without a longitudinal passage. into this fuel member 178 inches in diameter (
3.2mm) and 28mm long aluminum rod.
mm was inserted. Four 9mmX spaced 90° apart
A 0.025 inch (0.64 mm) circumferential groove was cut into the portion of the aluminum rod that penetrated the support. The support was Union Carbide PC-25 carbon with a length of 8 mm. The groove in the aluminum rod extended approximately 0.5 mm beyond the end of the support in the direction of the fuel. The support was loaded with 150 mg of glycerin. The same basic lined tube as in Example 1 enclosed the rear part of the fuel element. A void was left between the non-combusting end of the fuel member and the support. A series of holes were drilled in the base-lined tube in this void area to create air flow. Similar smoking articles were made using compressed carbon fuel plugs.

A smoking article as shown in FIG. 4 was prepared having a fuel source of carbonized cotton fibers. Four cotton slivers are tightly knitted together with cotton thread to create a diameter of 0.4 inch (10
, 2n+m) lobes were created.

This material was placed in a nitrogen atmosphere furnace and heated to 950°C. It took approximately 1.5 hours to reach this temperature and then held at this temperature for 0.5 hours. A 16 mm piece was cut from this pyrolyzed material for use as a fuel component. A 2 mm axial hole 16 was passed through this member with the sample. The fuel element was inserted 2 mm into a base-lined 20 mm long tube of the type described in Example 1. Granular Union Carbide PC containing 60 mg l:1 propylene glycol-glycerin mixture
100 mg of 25 was inserted into the basal lined tube. Approximately 60 mg of tobacco plugs of 5 mm length were placed directly behind the granular support in the base-lined tube. A 48 mm long circular cellulose acetate tube with a 4.5 mm inner diameter polypropylene tube was inserted approximately 3 mm into the base-lined tube.

a second length of 50 mm base-lined tube;
The cellulose acetate tube was fitted over a foil lined tube having a length of 20 mm until it abutted. A 5 mm long cellulose acetate filter plug was inserted into the end of this second base-lined tube. The total length was 84 mm. Upon ignition, this article generated significant aerosol with tobacco flavor over the first six puffs.

A smoking article having a 15 mm long fibrous fuel member substantially similar to that described in Reference Example 7 was prepared as shown in FIG. Macro capsule 52 with a thickness of 4 mils (0.10 m
A capsule with a length of 12 mm was made by crimping the aluminum foil piece (m) with a length of 15 mm. The macrocapsules were loosely filled with 100 mg of granular PC-60 carbon obtained from Union Carbide and 50 mg of blended tobacco. The granular carbon was impregnated with 60 mg of a 1:1 mixture of propylene glycol and glycerin. The macrocapsule, fuel member, and mouthpiece were integrated with an 85 mm long piece of conventional cigarette paper.

A smoking article having a 7 mm long compressed carbon fuel member containing 90% PxC carbon and 10% SCMC
It was created according to the specific example in the figure.

The longitudinal passage was 0.040 inches (1.02 mm) in diameter. This fuel plug was inserted into a 17 mm long aluminum foil lined tube so that 3 mm of the fuel member was inside the tube. Thickness 3.5 mil (0,
Made of aluminum foil with a diameter of 0.049 mm.
8mm diameter with inch (1,24mm) center hole
A disk was inserted into the other end of the tube, which abutted the end of the fuel source.

Union Carbide PG-60 carbon was granulated and sieved to a particle size of -6 to +10 mesh. 80
mg of this material was used as a support and 80 mg of a 1.1 part glycerin and propylene glycol mixture was loaded into the support.

The impregnated granules were inserted into the foil tube and abutted against the foil disk at the end of the fuel source. 50 mg of blended tobacco was placed loosely against the granular support. Furthermore, 0.049
A foil disk with an inch (1.24 mm) center hole is
An additional insertion was made into the foil tube at the mouth end of the cigarette. A long hollow cellulose acetate rod with a hollow polypropylene tube as described in Example 7 was inserted 3 mm into the base-lined tube. A second base-lined tube was fitted over the cellulose acetate rod and abutted the end of the 17 mm long base-lined tube.

This model shows that when smoked under FTC conditions, the first 3
Clothes delivered 11.0 mg of aerosol.

The total amount of aerosol delivered for 9 doses was 24.9 mg. A smoking article having the shape of the fuel member and support shown in FIG.
It was created using an annular compressed carbon fuel member. Fuel is 90
% PCB-G activated carbon and 10% SCMC. The support was a 10 mm long piece made of Union Carbide PC-25 carbon with an outer diameter of about 4 mm. A support filled with 55 mm of a 1:1 glycerin/propylene glycol mixture was inserted into the fuel end near the mouth end of the article. This fuel/support combination was equipped with a 70°
7 mm into the base-lined tube. The length of the article was approximately 77 mm.

This article delivered significant amounts of aerosol over the first three doses and the life of the fuel component.

The smoking article shown in Figure 9 was made as follows and had a diameter of 1 m.
4.5 mm in diameter and 9.5 mm in length with a longitudinal passage of m
mm carbon fuel source was extruded from a mixture of 10% SCMC, 5% potassium carbonate, and 85% carbonized paper mixed with 10% water.

This mixture had a dough-like consistency and was fed to an extruder. The extruded material was dried at 80° C. overnight and then cut into a predetermined length. The macrocapsule was formed into a cylindrical body with an inner diameter of 4.5 mm and a thickness of 0.0089 m.
It was made from a 22 mm long piece of aluminum. To this macrocapsule are added (a) 70 mg of vermiculite containing 50 mg of pro, a 1:1 mixture of pyrene glycol and glycerin, and (b) 30 mg of 6% glycerin and 6% propylene glycol. Filled with Burley tobacco. the fuel source and the macrocapsule by inserting the fuel source into the end of the macrocapsule by about 2
It was bonded by inserting mm. Inner diameter 4.5 mm
A polypropylene tube with a length of 35 mm was then inserted into the other end of the macrocapsule. The fuel source, macrocapsule and polypropylene tube were thus combined to form a piece 65 mm long and 4.5 mm in diameter. The pieces were wrapped in several layers of Maniglas Iooo from Manning Paper Company to a circumference of 24.7 mm. This unit was then combined with a 5 mm long cellulose acetate filter and wrapped in tobacco paper. When smoked under FTC conditions, this article delivers 8mg WTPM in the first 3 doses and 7mg WTPM in 4-6 doses.
PM was fed and 5 mg of WTPM was fed in doses 7-9.

The total aerosol delivery over the nine doses was 20 mg.

Tissue - When placed horizontally on paper, this article did not ignite or burn tissue paper.

[Brief explanation of drawings]

1 to 7 are longitudinal sectional views of various smoking articles according to reference examples, FIG. 1A is a sectional view taken along the line L A-I A of FIG. FIG. 3A is a cross-sectional view taken along the line 3A-3A in FIG. 3; FIG. 8 is an electrical cross-sectional view of a smoking essential part according to an embodiment of the present invention; FIG. 9 is an electrical cross-sectional view of a main smoking part according to an embodiment of the present invention, and FIG. 10 is an average peak temperature characteristic curve diagram of the smoking article of Reference Example 5 during use. 10...Fuel member 12...Aerosol generating means 14...Tube 15...Spirit 20...Glass beads 22...Disc 28...Tobacco filling FIG, 3 FIG, 3A FlG, 7 FIG ○ Yuzai (+″lTl

Claims (1)

[Claims] (1) (a) a fuel member; and (b) an aerosol-forming material disposed in heat transfer exchange relationship with the fuel member to receive heat from the fuel member; (c) consisting of inorganic fibers and having a thickness of at least 0.5 mm;
surrounding at least a portion of the fuel member;
A smoking article further comprising: a heat insulating member surrounded by paper.