FI83382C - ROEKANORDNING. - Google Patents

Abstract

The cigarette has a carbonaceous fuel element. A separate aerosol generator has a substrate bearing an aerosol forming material. The fuel element and substrate are arranged in a conductive relationship, so that the heat-stable substrate receives conductive heat transfer throughout the burning time of the fuel element. The fuel element is less than 30mm in length, with a density of at least 5 g/cc. An insulation material can surround part of the fuel element. The insulation is resilient and at least 15 mm thick. The cigarette also has a mouthpiece.

Description

1 83332

Smoking Product. - Redemption.

The present invention relates to a smoking article which forms an aerosol resembling tobacco smoke and which contains only the smallest possible amount of incomplete combustion or pyrolysis products.

Over the years, especially in the last 20 to 30 years, many smoking products have been developed, but none of these products has ever achieved commercial success.

Despite decades of effort and interest, there is no smoking product on the market that offers the benefits and advantages of conventional cigarette smoking without generating significant amounts of incomplete combustion and pyrolysis products. Examples of such prior art products are disclosed in SE-220,072, U.S. Pat. No. 4,340,072 and U.S. Pat. No. 3,713,451, all of which use a relatively long fuel cell.

The invention relates to a smoking article capable of generating significant amounts of aerosol both in the initial phase and during the life of the article without significant thermal decomposition of the aerosol former and without the presence of significant pyrolysis or incomplete combustion products and preferably without significant amounts of sidestream smoke. The smoking articles of the invention are capable of giving the user the sensations and benefits of smoking cigarettes without smoking tobacco.

These and other advantages are achieved by forming an elongate smoking article comprising: (a) a combustible carbonaceous fuel element disposed at the ignition end of the smoking article; (b) a physically separate aerosol generating member connected to the fuel element arranged to receive heat from 2 83382 fuel elements during smoking; and (c) means for transferring the aerosol produced by the aerosol generating member to the user, characterized in that the length of the combustible fuel element before smoking is less than about 30 mm and has a density of at least 0.5 g / cm 3.

A combustible carbonaceous material is preferably used as the fuel element. The physically separate aerosol generating member is preferably in a conductive heat exchange relationship with the fuel element. When the smoking article is ignited, the fuel element generates heat which is used to evaporate the aerosol-forming substance or substances in the aerosol-forming part. These volatile materials then pass from the mouthpieces towards the head, especially during suction, and further into the user's mouth in the same way as the smoke of a conventional cigarette.

The fuel element is less than about 30 mm in length, more preferably less than 15 mm, has a density of at least 0.5 g / cm 3 and is provided with one or more longitudinal channels. The aerosol generating member preferably includes a heat-resistant substrate containing one or more aerosol generating agents. The heat exchange relationship between the fuel and the aerosol generator is preferably provided by, for example, a thermally conductive member in a metal foil which efficiently conducts or transfers heat from the combustible fuel element to the aerosol generating member. This thermally conductive member contacts the fuel element and the aerosol generating member at least with respect to their circumferential surfaces.

Because the preferred fuel element is relatively short, the hot, combustible cone of fire is continuously close to the aerosol generating member, which maximizes heat transfer thereto and also maximizes the resulting aerosol production, especially in embodiments equipped with a thermally conductive member. The preferred use of a relatively short, low mass substrate or carrier as an aerosol generating member near the 3,83382 short fuel element also increases aerosol production by minimizing the heat sink effect of the substrate. Because the aerosol former is physically separated from the fuel element, it is exposed to substantially lower temperatures than in a combustible cone of fire, thus minimizing the potential for thermal decomposition of the aerosol former. In addition, by using a particularly advantageous carbonaceous fuel element with essentially no volatile organic material, the presence of substantially all pyrolysis or incomplete combustion products is eliminated and, in addition, the formation of sidestream smoke is eliminated.

The smoking article of the present invention usually has a mouthpiece having, for example, a longitudinal channel member for delivering the volatile material produced by the aerosol generating member to the user. The overall dimensions of the product are preferably the same as those of a conventional cigarette and therefore the mouthpiece and the aerosol delivery member both cover more than half the length of the product.

The smoking article of the invention may also include a dose or stopper of tobacco that can be used to add tobacco flavor to the aerosol. The tobacco is preferably placed at the mouth end of the aerosol generating member or may be mixed with the aerosol generating carrier. Flavorings and flavors can also be added to the product to improve the taste of the aerosol transferred to the user.

Preferred embodiments of the invention are capable of delivering at least 0.6 mg of aerosol measured as wet total particulate matter during the first three puffs when burned 4,83382 in accordance with FTC smoking rules (FTC smoking rules include two seconds suction) total volume 35 ml) separated by 58 seconds. More preferred embodiments of the invention are capable of delivering 1.5 mg or more of aerosol during the first three aspirations. The most preferred embodiments of the invention are capable of delivering 3 mg or more of aerosol during the first three puffs when burned in accordance with FTC smoking regulations. In addition, preferred embodiments of the invention provide an average of at least about 0.8 mg of total wet particulate matter per puff for at least the first six puffs, preferably for at least about 10 puffs according to FTC smoking regulations.

The smoking article of the invention is also capable of forming an aerosol which is chemically simple and consists essentially of carbon oxides, air, water and an aerosol with the desired flavors or other desired volatile materials and small amounts of other materials. Based on the Ames test discussed below, the aerosol preferably does not have a substantial gene-modifying effect. In addition, the product can be made substantially ash-free, so the user does not have to shed the ash during use.

As used herein, and for the purposes of this application only, the "aerosol" is limited to vapors, gases, particles, and the like that are both visible and invisible, and in particular those ingredients that the user perceives as "smoky" and formed by the heat from the combustible fuel element. substances in the constituent or elsewhere in the product. As defined in this way, the term "aerosol" also includes volatile flavors and / or pharmacologically or physiologically active substances, whether or not they form a visible aerosol.

As used herein, the term "conductive heat exchange ratio" is defined as the physical arrangement of an aerosol generating member and a fuel element, wherein heat is transferred from the combustible fuel element to the aerosol generating member during substantially the entire combustion phase of the fuel element. The conductive heat exchange ratio can be achieved by placing the aerosol generating member in contact with the fuel element and very close to the combustible portion of the fuel element and / or utilizing a conductive member to transfer heat from the combustible fuel to the aerosol generating member. Preferably, both methods are used to provide conductive heat transfer.

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

As used herein, the term "insulating member" means any material that acts primarily as an insulator.

These materials preferably do not burn in use, but may include slow-burning carbon and the like, as well as materials that melt during use, such as low temperature glass fibers. The thermal conductivity of the insulators in g-cal / (sec) (cm 2) (° C / cm) is less than about 0.05, preferably less. than about 0.02, most preferably less than about 0.005.

• See Hackh's Chemical Dictionary, 34 (4th edition, 1969) and Lange's Handbook of Chemistry, 10, 272-274 (11th edition, 1973).

The smoking product according to the invention is determined individually; in more detail in the following detailed description of the invention and the accompanying drawings, in which: Figures 1-7 are longitudinal views of various embodiments of the invention.

6 83382

Fig. 1A is a sectional view of the embodiment of Fig. 1 taken along line 1A-1A of Fig. 1.

Fig. 2A is a longitudinal view of a modified tapered fuel element according to the embodiment of Fig. 2;

Fig. 3A is a sectional view of the embodiment of Fig. 3 taken along line 3A-3Aj of Fig. 3;

Figure 8 shows the average peak temperature profile of the smoking article of Example 5 during use.

The diameter of the embodiment of the invention shown in Figure 1 is preferably the same as that of a conventional cigarette and includes a short, combustible carbonaceous fuel element 10, an adjoining aerosol generating member 12 and a film-coated paper tube 14 forming a mouthpiece 15 of the product. i.e., a "blown whistle" of charred wood provided with five longitudinally extending holes: 16, see Figure IA. The fuel element is about 20 mm long and can alternatively be wrapped in cigarette paper to improve the ignition of the charcoal fuel. This paper can be treated with known fire additives.

The aerosol generating member 12 includes a plurality of glass beads 20 coated with an aerosol-forming agent or agents, such as glycerin. The glass beads are held in place by a porous plate 22, which may be made of cellulose acetate. This plate may be provided with a series of circumferential grooves 24 which: form channels between the plate and the film-coated tube 14.

The film- or foil-coated paper tube 14 forms the mouthpiece of the product and surrounds the aerosol generating portion 7 83382 12 and the non-flammable rear portion of the fuel element 10.

The tubes also form an aerosol transfer passage 26 between the aerosol generating portion 12 and the mouth end 15 of the product.

The foil-coated tube 14 connects the non-flammable end of the fuel 10 to the aerosol former 12 and, in addition, its presence enhances heat transfer to the aerosol former. The foil also helps to extinguish the fire cone.

With only a small amount of unburned fuel left, heat loss through the foil acts as a heat sink to help extinguish the fire cone.

The foil used in this product is typically an aluminum foil with a thickness of 0.0089 mm, but the thickness and / or the type of metal used can be varied to achieve the desired degree of heat transfer. In addition, other types of heat conducting members may be used, such as Gra foil from Union Carbide.

The product illustrated in Figure 1 also optionally includes a tobacco mass or stopper 28 for imparting flavor to the aerosol.

This dose of tobacco 28 may be placed at the mouth end of the plate 22 as shown in Figure 1 or may be placed between the glass beads 20 and the plate 22. It can also be placed in the channel 26 at a distance from the aerosol former 12.

In the embodiment shown in Figure 2, the short fuel element 10 is a compressed carbon rod or plug about 20 mm long and provided with an axial hole 16. Alternatively, the fuel may be formed of carbonized fibers and preferably also provided with an axial channel corresponding to the hole 16. In this embodiment, the aerosol generating member 12 includes a heat-resistant conductive carbonaceous substrate 30, which may be, for example, a porous carbon stopper and which is impregnated with 8,83382 or impregnated with an aerosol-forming agent or agents. This substrate may have an optional axial channel 32, as shown in Figure 2. Also in this embodiment is a tobacco mass 28, which is preferably located at the mouth end of the substrate 30. Due to its appearance, this product also has an optional highly porous cellulose acetate filter 34, which may be provided with circumferential grooves 36 to form channels for the aerosol-forming agent between the filter 34 and the foil tube 14. As shown in Figure 2A, the flammable end 11 of the fuel element may optionally be tapered to improve flammability.

The embodiment of the invention shown in Figure 3 includes a short combustible, carbonaceous fuel element 10 secured to the aerosol generating member 12 by a thermally conductive rod 99 and a foil coated paper tube 14 which also leads to the mouth end 15 of the product. In this embodiment, the fuel element 10 may be blown charcoal. or a pressed or extruded carbon rod or plug or other carbonaceous fuel source.

The aerosol generating member 12 includes a heat-resistant carbonaceous substrate 30, such as a porous carbon plug, impregnated with an aerosol generating agent or agents. In this embodiment, there is a void 97 between the fuel element 10 and the substrate 30. The portion of the foil-coated tube 14 surrounding this void includes a plurality of circumferential holes 100 that allow sufficient air to enter the void to provide the necessary pressure drop.

As shown in Figures J and 3A, the heat conducting members include a conductive rod 99 and a foil-coated tube 14.

The rod 99 is preferably formed of aluminum and has at least one, preferably 2-5 circumferential grooves 96 to allow air to pass through the substrate. The product of Figure 3 is preferred in that the air added to the void space 9,833,827 97 contains less carbon oxidation products because it is not drawn through the combustible fuel.

The embodiment shown in Figure 4 includes a fibrous carbon fuel element 10, which may be carbonized cotton or rayon. The fuel element has one axial hole 16. The aerosol former substrate 38 is granular heat-resistant carbon. The tobacco mass 2B is placed immediately behind the substrate. This product is provided with a cellulose acetate tube 40 instead of the foil-coated tube of the previous embodiments. This tube 40 has a cellulose acetate fluff ring portion 42 surrounding an optional plastic, e.g. polypropylene tube 44. The mouth end 13 of this element has a low power cellulose acetate filter 43. The product is wrapped in its entire length in cigarette paper 46. A cap can be used at the mouth end. or a white coating 48 to mimic the filter head. Inside the paper, a foil strip 30 is placed near the fuel side end of the product. This band preferably extends from the rear of the fuel element to the mouth end of the tobacco dose 28.

It may be integral with the paper or it may be a separate piece fitted in place prior to coating with the paper.

The embodiment of Figure 3 is similar to that shown in Figure 4. In this embodiment, the aerosol generating member is formed of an aluminum macrocapsule 32 filled with a granular substrate or a mixture of granular substrate 34 and tobacco 36 as shown in the drawing. The macrocapsule 32 is folded at its ends 38, 60 to enclose the material therein and prevent the aerosol former from escaping. The folded end 38 on the fuel side is preferably against the rear end of the fuel element to form a conductive heat transfer. Head 58 molding; the void space 62 provided also helps prevent the aerosol former 83382 from entering the fuel. Longitudinal passages 59 and 61 are formed to allow the passage of air and aerosol-forming agent. The macrocapsule 52 and the fuel element 10 may be joined or bonded together with conventional cigarette paper 47 as shown in the figure, perforated ceramic paper or foil tape. If cigarette paper is used, the portion 64 near the back of the fuel should be printed or treated with sodium silicate or some known materials that cause the paper to go out. The entire length of the product is coated with ordinary cigarette paper 46.

Fig. 6 shows another embodiment with a fuel plug 10 of compressed carbon. 70. A second, optional aluminum plate 72 with a hole 74 is located at the mouth end of the aerosol former 12. In between is a region 76 containing a particulate substrate and a region 78 containing tobacco. The fuel element is attached to the foil wrapper 66 and this extends behind the second aluminum plate 72. This embodiment also includes a hollow cellulose acetate rod 42 having an inner polypropylene tube 44 and further includes a cellulose acetate filter 45. Preferably, the entire length of the product is wrapped in cigarette paper 46.

The embodiment shown in Figure 7 uses a substrate 60 enclosed or embedded in a large cavity 62 in the fuel element 10. In this embodiment, the fuel element is preferably formed of extruded carbon and the substrate 80 is usually a relatively rigid, porous material. The product is 11,83382 wrapped along its entire length in conventional cigarette paper 46. This embodiment may also include a foil strip 84 for attaching the fuel element 10 to the cellulose acetate tube 40 and aiding in fuel extinction.

When ignited, one of the above embodiments burns the fuel element to generate heat which is used to evaporate the aerosol generating agent or agents in the aerosol generating member. These volatile materials are then drawn towards the mouth end, especially during suction, and further into the user's mouth in the same way as the smoke of a conventional cigarette.

Because the fuel element is preferably relatively short, the hot, combustible cone of fire is always close to the aerosol generating unit, which maximizes heat transfer to the aerosol generating member and subsequent aerosol formation, especially when a preferred heat conducting member is used. In addition, the preferred insulating member tends to limit, direct and concentrate heat towards the center of the product, thus increasing the heat transferred to the aerosol-forming agent.

Because the aerosol-forming agent is physically separated from the fuel element, it is exposed to substantially lower temperatures than those present in a burning fire cone. This minimizes the potential for thermal decomposition of the aerosol former. This also results in aerosol formation during aspiration, but little or no aerosol formation during smoking. In addition, the use of preferred carbonaceous fuel elements and a physically separate aerosol generating member i2 83382 substantially eliminates the formation of pyrolysis or incomplete combustion products and substantially prevents the formation of sidestream smoke.

Due to the small size and combustion characteristics of the preferred carbonaceous fuel element used in the invention, the fuel element generally begins to burn over substantially its entire visible length after a few aspirations. The part of the fuel element in the immediate vicinity of the aerosol generating part thus heats up rapidly, which considerably increases the heat transfer to the aerosol generating part, especially during the initial and middle suctions. Because the preferred fuel element is short, there is at no point a long non-combustible piece of fuel that would act as a heat sink and, as was usually the case with previous thermal aerosol products. Heat transfer and therefore the flow of the aerosol is also improved by the use of holes passing through the fuel, which holes draw hot air into the aerosol generator, especially during suction.

In preferred embodiments of the invention, the short carbonaceous fuel element, the heat conducting member, and the channels in the fuel cooperate with the aerosol generator to provide a system capable of producing substantial amounts of aerosol with virtually every aspiration. The fact that the fire cone is very close to the aerosol former after a few aspirations and the use of an insulating part results in strong heat transfer both during aspiration and during the relatively long boiling phase between aspirations.

While not wishing to be bound by theory, it can be believed that the aerosol generating member remains at a relatively high temperature between aspirations and that the additional heat generated during aspirations, greatly increased by a hole or holes in the fuel element, acts primarily to evaporate the aerosol generating agent. This improved heat transfer means more efficient use of the available fuel energy, reduces the amount of fuel required and facilitates the initial flow of the aerosol. In addition, the conductive heat transfer used in the invention lowers the combustion temperature of the carbon fuel, which in theory further reduces the C0 / C = ^ ratio in the combustion products formed by the fuel. See e.g.

G. Haga, General Inorganic Chemistry, page 592 (John Wiley & Sons, 1969).

Furthermore, by appropriately selecting the fuel element, the insulating jacket, the paper wrapper and the heat conductor member, it is possible to monitor or control the combustion properties of the fuel source. In this way, it is possible to control the heat transfer to the aerosol generator, which in turn changes the amount of suction and / or the amount of aerosol coming to the user.

In general, the combustible fuel elements used to practice the invention are less than 30 mm long.

Preferably, the length of the fuel element is about 20 mm or less, preferably about 15 mm or less. The diameter of the combustion element is preferably about 3-8 mm, more preferably about 4-5 mm. The density of the fuel elements used herein has been from about 0.5 g / cm 3 to about 1.5 g / cm 3. The density is preferably greater than 0.7 g / cm 2, more preferably greater than 0.8 g / cm 2. The fuel is preferably provided with one or more longitudinally extending holes, such as hole 11 in Figures 1-5. These holes provide porosity and initially improve heat transfer to the substrate by increasing the amount of hot gases entering the substrate.

i4 83382

The preferred fuel elements used in the invention are mainly formed of a carbonaceous material. The length of the carbonaceous fuel elements is preferably about 5-15 mm, more preferably about 8-12 mm. Carbonaceous fuel cells equipped with these properties contain sufficient fuel for at least about 7 to 10 puffs, which is generally the normal puff amount when burning a conventional cigarette in accordance with FTC regulations.

Such a fuel element preferably has a carbon content of at least 60 to 70%, more preferably at least about 80% by weight or more. Excellent results have been achieved with fuel cells with a carbon content of more than about 85% by weight. Carbon-rich fuels are preferred because they produce as little pyrolysis and incomplete combustion products as possible, little or no visible sidestream smoke, and as little ash, and also have a high heat capacity. However, fuel elements containing less carbon, e.g. about 50 to 65% by weight, are also within the scope of this invention, especially when a non-combustible inert filler is used.

Other fuel materials, such as tobacco, tobacco substitutes, and the like, are also useful, though not preferred, provided that they generate and conduct sufficient heat to the aerosol generating member to produce the desired amount of aerosol from the aerosol generating material, as discussed above. The density of the fuel used should be greater than about 0.5 g / cm 2, preferably greater than about 0.7 g / cm 2, which is higher than the densities normally used in conventional smoking articles. When using such other materials, it is very preferred to incorporate carbon in the fuel in amounts of preferably at least about 20 to 40 weight percent, more preferably at least about 50 weight percent, and most preferably at least about 65 to 70 weight percent, with the remainder being other fuel components including combustion control agents, moisture, etc. .

The carbonaceous materials used in the preferred fuel or as the preferred fuel can be obtained from virtually any of a variety of carbon sources known to those skilled in the art. The carbonaceous material is preferably obtained by pyrolysis or carbonation of a cellulosic material, such as wood, cotton, rayon, tobacco, coconut, paper, and the like, although carbonaceous materials from other sources may be used.

In most cases, the carbonaceous fuel element should be able to ignite with a conventional cigarette lighter without the use of an oxidizing agent. Combustion properties of this type are generally obtained from a cellulosic material pyrolyzed at temperatures of about 400 to about 1000 ° C, preferably about 500 to about 950 ° C in an inert atmosphere or vacuum. The pyrolysis time is obviously not decisive, as long as the temperature in the center of the pyrolyzed mass has reached said temperature range for at least a few minutes. However, slow pyrolysis using gradually rising temperatures over several hours is believed to produce a more uniform material and a higher carbon yield. Although in most cases this is undesirable, the invention also includes carbonaceous fuel elements which require the addition of an oxidizing agent to ignite them with a cigarette lighter, and likewise the carbonaceous materials of the invention which require the use of a glow retarder or some other type of combustion regulator. Such combustion modifiers have been disclosed in many patents and publications and are familiar to those skilled in the art.

The most preferred carbonaceous fuel elements used in the practice of the invention are substantially completely free of 16,83382 volatile organic materials. This means that the fuel element is not intentionally impregnated or mixed with significant amounts of volatile organic substances, such as volatile aerosol formation! spices that could decompose in combustible fuel. However, the fuel may contain small amounts of water, which are naturally adsorbed by the fuel.

Similarly, small amounts of aerosol generating agents may also be emitted from the aerosol generating member and thus may be present in the fuel element.

A preferred carbonaceous fuel element is a compressed or extruded carbon mass made from carbon and a binder by conventional pressure-compression or extrusion methods. The preferred activated carbon for such a fuel element is PCB-G and the preferred inactive carbon is PXC, both available from Calgon Carbon Corporation, Pittsburgh, PA. Other preferred carbons for compression and / or extrusion are made from pyrolyzed cotton or pyrolyzed papers.

The binders used in the manufacture of such a fuel element are well known in the art. A preferred binder is sodium carboxymethylcellulose (SCMC), which may be advantageously used alone or in combination with other materials such as sodium chloride, vermiculite, bentonite, calcium carbonate and the like. Other useful binders include gums such as guar gum and other cellulose derivatives such as methylcellulose and carboxymethylcellulose (CMC).

Very many binder concentrations can be used. The amount of binder is preferably limited so that the binder has as little effect as possible on the formation of undesired combustion products. On the other hand, there must be sufficient binder to hold the fuel element together during manufacture and use. The amount used thus depends on the experimental stability of the carbon in the fuel element.

If desired, said fuel elements can be pyrolyzed after formation to, for example, about 650 ° C for 2 hours to convert the binder to carbon, thereby forming a virtually 100% carbon fuel element.

The fuel elements used in the present invention may also contain one or more additives to improve combustion, in which case up to about 5% by weight of sodium chloride may be used to improve the boiling properties and act as a glow retarder. Likewise, up to about 5, preferably 1-2% by weight of potassium carbonate may be added to improve flammability.

Additives can also be used to improve physical properties, in which case clays such as kaolins, serpentines, attapulgites and the like can be used.

Another carbonaceous fuel element is carbon-fiber fuel, which can be prepared by carbonizing a fibrous precursor such as cotton, rayon, paper, polyacylonyl brick, and the like. Pyrolysis at a temperature of about 650 to 1000 ° C, preferably about 950 ° C is generally sufficient. for about 30 minutes in an inert atmosphere or vacuum to produce a suitable carbon fiber with good combustion properties.These fiber fuels can also be supplemented with combustion modifiers.

The aerosol generating member used in carrying out the invention is physically separate from the fuel element. Physically · 'separately' means that the substrate, container or container containing the aerosol-forming materials is not mixed with 18 83382 and not even part of it is mixed with the combustible fuel element. As previously stated, this arrangement reduces or eliminates the heat, dispersion, and presence of sidestream smoke of the aerosol former. Although the aerosol generating member is not part of the fuel, it is in a conductive heat exchange relationship with the fuel element and is preferably located adjacent to or immediately adjacent to the fuel element.

The aerosol generating member preferably includes one or more heat-resistant materials having one or more aerosol-forming agents. The heat-resistant material used in this invention is able to withstand high temperatures in the vicinity of the fuel, e.g. 400 to 600 ° C without decomposing or burning. The use of such a material is believed to maintain the simple "smoke chemistry" of the aerosol, as evidenced by the absence of the Ames effect in the preferred embodiments. It is in accordance with the invention to use, although it is not preferred to use other aerosol-forming components, such as thermally fissile microcapsules or solid aerosol-forming agents, provided that they are capable of releasing sufficient aerosol-forming vapors that satisfactorily resemble tobacco smoke.

Heat-resistant materials used as a substrate or carrier for an aerosol-forming agent are well known to those skilled in the art. Useful substrates should be porous and should be able to hold the aerosol-forming compound when not in use and release any aerosol-forming vapor when heating the fuel element.

Useful heat-resistant materials include heat-resistant adsorbent carbons such as porous quality carbons, graphite, activated or inactive carbons, and the like. Other suitable materials include solid inorganic materials such as ceramics, glass, alumina, vermiculite, clays such as bentonite, and the like. Currently preferred substrate materials include carbon felts, fibers and sheets, activated carbons and porous carbons such as PC-25 and PG-60 from Union Carbide, as well as SGL carbon available from Calgon.

Depending on which particular aerosol-forming member is used, its composition and structure may generally be selected from particulate, fibrous, porous bodies, solid bodies through which one or more axial channels extend, and the like. In particular, the particulate substrates can be placed in a container, which is preferably formed of a metal foil.

The aerosol generating member used in the invention is usually located at a maximum distance of about 60 mm, preferably at most 30 mm and most preferably at most 13 mm from the ignition end of the fuel element. The length of the aerosol former may vary from about 2 to 60 mm, preferably from about 5 to 40 mm, and most preferably from about 20 to 35 mm. If a non-particulate substrate is used,. it may be provided with one or more holes to increase the surface area of the substrate and to increase airflow and heat transfer.

The aerosol generating agent or agents used in the invention must be able to form an aerosol at the temperatures in the aerosol generating member when heated by a combustible fuel element. The substances are preferably composed of carbon, hydrogen and oxygen, but may include other materials. Aerosol generating agents can be solid, semi-solid or liquid. The boiling point of the substance and / or mixture of substances can be as high as about 500 ° C. Substances with such properties include polyhydric alcohols, such as glycerin and propylene glycol, as well as aliphatic esters of mono-, di- or polycarboxylic acids, such as methyl stearate, dodecanedioate, dimethyltetrododandioate and others.

The aerosol-forming agents preferably include a mixture of a high boiling point low vapor pressure agent and a low boiling point high vapor pressure agent. Thus, in the first aspirations, the low-boiling substance forms the majority of the initial aerosol, and as the temperature rises in the aerosol former, the high-boiling substance forms the majority of the aerosol.

Preferred aerosol-forming agents are polyhydric alcohols or mixtures of polyhydric alcohols. Particularly preferred aerosol generators are glycerin, propylene oligol, triethylene glycol or mixtures thereof.

The aerosol-forming agent may be dispersed in the aerosol-forming portion at a concentration sufficient to coat or impregnate the substrate, carrier, or container. The aerosol-forming agent can be used, for example, as such, i.e. at full power or as a dilute solution by dipping, spraying, steam-spreading or the like. The solid aerosol-forming ingredients can be mixed into the substrate and distributed evenly prior to formation.

Although the loading of the aerosol-forming agent varies from carrier to carrier and from aerosol-forming agent to aerosol-forming agent, the amount of liquid aerosol-forming agents is generally about 20 to 120 mg, preferably about 35 to about 85 mg, and most preferably about 45 to about 65 mg. As many aerosol generators in the aerosol generating section as possible should be made available to 21,83382 users as WTPM. Preferably, greater than about 2 weight percent, more preferably greater than about 15 weight percent, and most preferably greater than about 20 weight percent of the aerosol former in the aerosol generating member is delivered to the user as a WTPM.

The aerosol-forming component may also include one or more volatile flavors such as menthol, vanillin, artificial coffee, tobacco extracts, nicotine, caffeine, liquids, and other substances that impart flavor to the aerosol.

It may also contain any other desired volatile solid or liquid materials.

As discussed above, the smoking article of the invention may also contain a dose or stopper of tobacco that can be used to add tobacco flavor to the aerosol.

The tobacco is preferably placed at the mouth end of the aerosol generating member or may be mixed with the aerosol generating carrier. Flavors can also be added to the product to flavor the aerosol to the user.

If a dose of tobacco is used, the hot vapors pass through the tobacco layer, extracting and evaporating the tobacco: volatile ingredients without the need to burn the tobacco.

The user of this tobacco product thus receives an aerosol which contains the qualities and flavors of natural tobacco but does not contain the combustion products caused by a conventional cigarette.

: Alternatively, these optional agents may be placed between the aerosol generating member and the oral end, for example, in a separate substrate or in a chamber or space in the channel leading from the aerosol generating member to the oral end, or in an optional tobacco dose. If desired, these volatile substances may be used in place of the aerosol-forming agent or a portion of this substance may be replaced so that the product imparts to the user 22 83382 a non-aerosol flavor or other substance.

Products such as those set forth herein may be used or modified for use as drug delivery products for the administration of volatile pharmacologically active agents such as ephedrine, metaprotenol, terbutaline, or the like.

The heat conducting member preferably used in the present invention is typically a metal foil, such as aluminum foil, having a thickness ranging from less than Θ, ΘΙ mm to about 0.1 mm or more. The thickness and / or type of conductive material can be varied to achieve any desired degree of heat transfer. As shown in the described embodiments, the heat conducting member preferably contacts or overlaps with a portion of the fuel element and the aerosol generating member and may form a container surrounding the aerosol generating agent.

In most embodiments of the invention, the fuel / aerosol generating assembly is attached to a mouthpiece, such as the foil-coated paper or cellulose acetate / plastic tube shown in the figures, although the mouthpiece may also be formed separately, for example, as a cigarette suction. This part of the product forms a channel which directs the evaporated or vaporized aerosol-forming agent into the mouth of the user. Since its length is preferably about 50 to 60 mm or less, it also keeps the hot cone of fire away from the user's mouth and fingers.

Suitable mouthpieces should be inert to aerosol-forming agents, have a water- or liquid-tight inner layer, minimize aerosol loss due to condensation or filtration 23 8 3 3 8 2, and be able to withstand the temperature at the interfaces of other elements of the product. Preferred mouthpieces are the foil-coated tube of Figures 1-3 and the cellulose acetate tube used in the embodiments of Figures 4-9.

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

The mouthpieces of the invention may include an optional "filter" used to give the product the appearance of a conventional filter cigarette. These filters include low density cellulose acetate filters and hollow or tapered plastic filters made of, for example, polypropylene. In addition, the entire length of the product or any part thereof may be wrapped in cigarette paper.

The aerosol formed by the preferred products of the invention is chemically simple, consisting essentially of air, carbon oxides, an aerosol carrying the desired flavors or other desired volatile materials, water and small amounts of other substances. The total wet particulate matter (WTPM) formed by the preferred products of this invention does not have a mutagenic effect as measured by the Ames test, i.e., the WTPM of the invention and the standard test micro-; there is no significant dose-response relationship between the amount of revertants present in organisms *: *. According to the developers of the Ames test, a significant dose-dependent reaction indicates the presence of mutagenic materials in the tested products. See Ames et al ♦, Mut, Res. , 31: 347-364 (1975); Nagas et al.,. Mut. Res., 42: 335 (1977).

An additional advantage of the preferred embodiments of the invention is the relative absence of ash formed during use compared to ash from a conventional cigarette. When the preferred carbon fuel source burns, it 2ΐ 83382 is substantially converted to carbon oxides, forming relatively little ash, and therefore there is no need to shed the ash when using the product.

The smoking article of the invention will be further elucidated with reference to the following examples, which help to understand the invention but are not intended to limit it. Unless otherwise indicated, all percentages are by weight. All temperatures are in ° C and are uncorrected. In all cases, the diameter of the smoking articles is about 7-8 mm, which is the diameter of a conventional cigarette.

Example 1

A smoking article according to the embodiment of Figure 1 was prepared. The fuel element was a 25 mm long charcoal whistle with five 1.02 mm longitudinal channels made with a size 60 drill. The carbon weighed 0.375 g. The fuel element was wrapped in conventionally treated cigarette paper. The substrate consisted of 500 mg of glass beads (average diameter 1.63 mm) coated with two glycerol lip droplets of about 50 mg. When packaged in a tube, this substrate was about 6.5 mm long. The foil-coated tube consisted of a 0.0089 mm layer of aluminum foil surrounded by a 0.108 mm layer of helically wrapped bleached paper.

This tube surrounds the back of the fuel element by 5 mms. A short (8 mm) piece of cellulose acetate with four grooves in the circumference was used to hold the glass beads against the fuel source. An additional 8 mm long grooved cellulose acetate filter was inserted into the mouth end of the tube to provide the appearance of a conventional cigarette. The total length of the product was about 70 mm.

Such products formed a significant aerosol with 25 83382 igniters, smaller amounts of aerosol with aspirations 2 and 3, and good aerosol transfer with aspirations 4-9. Such products generally yielded about 3 to 7 mg of total wet particulate matter (WTPM) when burned in a machine according to FTC smoking methods with a suction volume of 35 ml, a suction time of 2 seconds and a suction interval of 60 seconds.

Example 2 A. Four smoking articles were prepared with 10 mm long compressed carbon fuel elements and glass bead substrates. The fuel cells contained 90% PCB-G and 10% SCMC at a load of approximately 2273 kg and had a conical ignition head as shown in Figure 2A. One 1.02 mm hole was formed in the center of each element. Three of the four fuel sources were wrapped in Θ mm wide conventional cigarette papers. The fuel elements were inserted about 2 mm into the 70 mm long foil-coated tubes described in Example 1. The glass beads were coated with the amount of glycerol shown in the following table and inserted into the open end of the foil-coated tube and held against the fuel element by 5 mm long polypropylene foam filters with a series of longitudinal circumferential grooves. A 5 mm long low power cellulose acetate filter was inserted into the • end of each product. These products were mechanically incinerated according to FTC smoking regulations and the total wet particle volume (WTPM) was collected in Cambridoe wadding. The results of these experiments are shown in Table I.

• · • m * * »• · · t · t 26 83382

TABLE I

Glass Aerosol WTPM (mg) / suction beads former (weight) (weight) 1-3 4-6 7-9 10-12 Total A 400.4 mg 40.5 mg 8.1 4.5 0.9 0 13 , 5 B * 405.6 mg 59.4 mg 10.2 1.9 0.7 0 12.8 C 404.0 mg 60.6 mg 7.6 6.9 0.4 0 14.9 D 803, 8 mg 81.0 mg 5.9 2.5 3.7 0.9 13.0 ♦ The fuel rod in this section was not wrapped in cigarette paper.

B. Three smoking articles were prepared as described in Example 2A with 20 mm long carbon tube fuel elements as described in Example I. These products were mechanically burned according to FTC smoking regulations and WTPM was collected in Cambridge tubes. The results of these experiments are shown in Table II.

TABLE II

, A,. WTPM (mg) / aspirations

Glass Aerosol Beads (weight) (weight) 1-3 4-6 7-9 10-12 Total E 402.4 mg 60.6 mg 0.1 5.4 6.2 0.6 12.3 F * 404.7 mg 63.1 mg 0.5 0.9 2.2 3.1 7.0 G 500.0 mg 50.0 mg 0.3 2.9 3.0 0 6.2 ♦ The fuel rod in this section is not had been wrapped in cigarette paper.

Example 3 A. Four smoking π 83382 products as shown in Figure 2 were prepared with a 10 mm long compressed carbon-fuel element and the conical ignition head shown in Figure 2A. The fuel cell contained 90% PCB-G carbon and 10% SCMC with a load of approximately 2273 kg. A 1.02 mm hole was drilled in the center of the element. The aerosol former substrate was cut and machined into the correct shape from PC-25 sold by Union Carbide Corporation, Danbury, CT. The substrate for each product was about 2.5 mm long and about 6 mm in diameter. It was loaded with an average of about 27 mg of a 1: 1 propylene glycol-glycerol mixture. A foil-coated mouthpiece tube such as that used in Example 1 surrounds the back of the fuel element 2 mm and the substrate. Approximately 100 mg of Burley tobacco was placed against the oral end of the substrate. A short tapered polypropylene filter about 5-9 mm in length was placed at the mouth end of the foil-coated tube. The 32 mm cellulose acetate filter had a hollow polypropylene tube in the middle and the filter was placed between the tobacco and the filter body. The total length of each product was about 7B mm.

B. An additional six substantially products of Example 3A were prepared, but the length of the substrate was increased to 5 mm and a 1.02 mm hole was drilled through the substrate. In addition, these products did not have a cellulose acetate / polypropylene tube. Approximately 42 mg of the polypropylene glycol: *: glycerol mixture was applied to the substrate. In addition, two doses of Burley tobacco were used, each containing about 100-150 mg. The first was placed against the mouth end of the substrate and the second was placed against the filter.

C. Four more products were prepared essentially as described in Example 3A, except that a dose of about 100 mg of flue-dried tobacco containing about 6% by weight of diammonium monohydrogen phosphate was used instead of Burley tobacco.

D. The smoking articles of Examples 3A-C were tested using the standard Ames test, see Ames, et al.,

Mut. Res., 31: 347-364 (1975), modified by Nagas et al., Mut. Res., 42: 335 (1977), and 113: 173-215 (1983). Samples 3A and C were "burned" in a conventional cigarette burner using a suction volume of 35 ml, a suction time of 2 seconds and a suction frequency of 30 seconds, and ten sucks were performed. The smoking articles of Example 3B were smoked in the same manner except that a suction frequency of 60 seconds was used. Only one filter plug was used for each product group. The following wet total particulate matter (UTPM) was obtained for the product groups shown:

WTPM

Example 3A 63.4 mg

Example 3B 50.6 mg

Example 3C 69.2 mg

The WTPM-containing filter pads collected from each of the above examples were shaken for 30 minutes in DMSO to dissolve the WTPM. Each sample was then diluted to a concentration of 1 mg / ml and used as a "selalisen" in the Ames assay. Using the method of Nagas et al., Mut.

Res. 42: 335-342 (1977) were mixed at a concentration of 1 mg / ml in the WTPM S-9 activation system and regular Ames bacterial cells and incubated at 37 ° C for 20 minutes. The bacterial species used in this Ames experiment was Salmonella typhimurium. TA 98. See Purchase et al., Nature, 264: 624-627 (1976). Agar was then added to the mixture and plates were prepared. Agar plates were incubated for 2 days at 37 ° C and the resulting cultures were counted. Four plates were used for each dilution and column standard deviations were compared to pure DMSO control culture. As shown in Table lii, WTPM from any of the smoking products tested 29,83382 did not cause a mutagenic effect. This can be confirmed by comparing the average conversion rate per plate to the average conversion rate obtained from the comparison (0 <ug WTPM / plate). In mutagenic samples, the mean change per plate increases with increasing doses.

• · · • · · · · · · • • · 1 · • «• · · • • 30 * 3333 30 83382

TABLE III

Example 3A

Dose (uq WTPM / plate) Mean change / plate S.D.

Comparison D 49.3 3.4 33 51.3 9.1 66 50.5 7.0 99 50.8 5.2 132 51.5 5.3 165 53.8 10yl 198 48.3 4.6

Example 3B

Dose (uq WTPM / plate) Mean change / plate S.D.

Comparison 0 56 10.5 31.5 40 7.8 63 48.3 6.3 94.5 54.0 8.4 126 39 4.7 157.5 421.5 9.3 189 43 9.1

Example 3C

Dose (uq WTPM / plate) Mean change / plate S.D.

Comparison 0 £ 48.3> .7 36 50.3 9.9 72 49.0 3.9 108 55.3 4.5 144 43.0 6.4 180 42.3 8.8 216 44.3 7.8 1

Mean deviation 3i 83382

Example 4

Four smoking articles as shown in Figure 2 were prepared. Each product had a 10 mm compressed carbon fuel source according to Example 3A. This fuel element was inserted 3 mm into one end of a 70 mm long aluminum foil coated tube as described in Example 1. A 5 mm long carbon felt substrate cut from rayon felt sold by Fiber Materials Inc. was pushed against the fuel source. This substrate was loaded with an average of about 97 mg of a 1: 1 mixture of glycerin and propylene glycol, about 3 mg of nicotine, and about 0.1 mg of flavor. mixture of substances. A 3 mmm dose of blended tobacco was pushed against the mouth end of the substrate. A 3 mm long cellulose acetate filter was placed at the mouth end of the foil-coated tube.

These products were incinerated in accordance with FTC regulations. The aerosol from these products was collected in one Cambridqe tube (133.3 mg WTPM), diluted with DMSQise to a final concentration of 1 mg WTPM per ml, and tested for Ames activity as described in Example 3D: using each of the following species: Salmonella. typhimurium TA 1535, 1537, 1538, 98 and 100. In the table. · 1 ·. Collected from products tested as shown in Figure IV: · # WTPM was not mutagenic.

• · • · * · · • »» • »1 · · * · 32 83382

TABLE IV

* TA 1535 * TA 1537

Dose Mean changes Dose Mean changes

Comparison 0 16 Comparison 0 14 25 13 25 13 50 14 50 14 75 17 75 11 100 14 100 13 125 12 150 14 # TA 1538 * TA 98

Dose Mean changes Dose Mean changes

Comparison 0 15 Comparison 0 61 25 13 25 62 50 22 50 47 75 16 75 42 100 20 100 44 125 19 125 39 150 19 150 40 TA 100 *

Dose Mean changes

Comparison 0 110 25 109 50 105 75 99 100 107 125 108 150 109 ug WTPM / plate 33 83382

Example 5

A smoking article as shown in Figure 2 was prepared with 10 mm of compressed carbon fuel and had a shape similar to that shown in Figure 2, but no tobacco was included. The fuel element was made from a mixture of 90% PCB-G activated carbon and 10 S SCMC with a binder load of about 2273 kg. A 1.02 mm longitudinal channel was formed in the fuel element. The substrate was a 10 mm long porous carbon plug made of Union Carbide PC-25. It had a 0.74 mm drilled axial hole and was loaded with 40 mm of a mixture of polypropylene glycol and glycerol (1: 1). A foil-coated tube as shown in Example 1 surrounds the back of the fuel element for a distance of 2 mm and formed a mouthpiece. The product did not have a filter, but it was wrapped in regular cigarette paper. The total length of the product was 80 mm.

The average peak temperatures for this product are shown in Figure 10 as "suction" and "smoking". As shown, the temperature drops evenly between the rear end of the fuel element · *.:. · And the mouth end. This ensures that the user does not experience an unpleasant burning sensation *: * when using the product according to the invention.

Example 6

A smoking article according to the embodiment of Figure 3 was prepared. The fuel element was a 19 mm long charcoal whistle with no longitudinal channels. An aluminum rod with a diameter of 3.2 mm and a length of: * · 28 mm was embedded inside the 13 mm fuel element. Four circumferential grooves were cut into the perforating aluminum rod portion of the substrate, which were: 90 ° apart and having dimensions of 9 mm x 0.64 ··· _ mm. The substrate was an 8 mm long piece of 34,83382 PC-25 carbon from Union Carbide. The grooves of the aluminum rod extended approximately 0.5 mm over the end of the substrate toward the fuel. The substrate was loaded with 150 mg of glycerol. A foil-coated tube similar to that shown in Example 1 surrounds the back of the fuel element. A gap was left between the non-combustible end of the fuel cell and the substrate. A series of holes were cut through the foil-coated tube in the area of this gap to allow air flow. A similar smoking product was made by supplying it with compressed carbon fuel.

Example 7

A smoking article similar to that shown in Figure 4 was prepared with the fuel source being carbonized cotton fiber.

The four cotton strands were tightly braided together with a cotton thread to form a rope about 10.2 mm in diameter. This material was placed in a nitrogen atmosphere furnace heated to 950 ° C. It took about 1 1/2 hours to reach this temperature, which was then maintained for half an hour. A 16 mm piece of this pyrolyzed material was then cut for use as a fuel element. A 2 mm axial hole was made through the element using 16 inserts. The fuel element was inserted 2 mm into a 20 mm long foil-coated tube as described in Example 1. A 100 mg Union Carbide PC-25 in granular form containing 60 mg of a 1: 1 propylene glycol-glycerol mixture was charged to a foil-coated tube.

A 5 mm long dose of tobacco, about 60 mg, was placed immediately behind the granular substrate in a foil-coated tube. A 48 mm long annular cellulose acetate tube with a 4.5 mm inner diameter polypropylene tube was inserted into a foil-coated tube of about 3 mm. A second 50 mm length of foil-coated tube was pushed over the cellulose acetate tube so far that it rested against the 20 mm foil-coated tube. A 5 mm long cellulose acetate filter was inserted at the end of this second foil coated 35 8 3 3 8 2 tube. The total length was 84 mm. When ignited, this product formed significant amounts of tobacco-flavored aerosol during the first six puffs.

Example 8

A smoking article as shown in Figure 5 was prepared with a 15 mm long fibrous fuel element substantially as shown in Example 7. The macrocapsule 52 was formed from a 15 mm long piece of 0.10 mm thick aluminum foil which was folded to form a 12 mm long capsule. This macrocapsule was loosely filled with 100 mg of granulated PC-60, a 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 glycerol. The macrocapsule, fuel element and mouthpiece were joined with an 85 mm long piece of regular cigarette paper

Example 9

A smoking article was prepared according to the embodiment of Figure 6 with a 7 mm long compressed carbon fuel element containing 90% PXC carbon and 10%. SCMCstä. The diameter of the longitudinal channel was 1.02 mm. This: · * The fuel plug was pushed 17 mm long with aluminum foil. into the coated pipe with 3 mm of fuel element inside the pipe. A 0.089 mm aluminum foil plate with a diameter of 8 mm and a central hole with a diameter of 1.24 mm was inserted at one end of the tube and further against the end of the fuel source.

Union Carbide PG-60 carbon was granulated and screened to a particle size of -6 to +10 mesh. 80 mg of this material was used as a substrate and 80 36 8 3 3 8 2 mg of a 1: 1 mixture of glycerin and propylene glycol was loaded on this substrate. The impregnated granules were inserted into a foil tube and placed to rest against a foil sheet at the end of the fuel source. 50 mg of blended tobacco was placed loosely against the substrate granules. At the mouth end of the tobacco, an additional foil plate with a 1.24 mm center hole was inserted into the foil tube. A long hollow cellulose acetate rod with a hollow polypropylene tube as described in Example 7 was inserted 3 mm into the foil-coated tube. The second foil-coated tube was pushed onto a cellulose acetate rod against the end of a 17 mm foil-coated tube.

This product produced 11.0 mg of aerosol on the first three aspirations "burned" according to FTC regulations. The total aerosol yield during the nine aspirations was 24.9 mg.

Example 10

A smoking article was prepared having a fuel element and substrate structure similar to that shown in Fig. 7, and a 15 mm long annular compressed carbon fuel element having an inner diameter of about 4 mm and an outer diameter of about 8 mm was used. 90% PCB-G activated carbon and 10 S SCMC were used to prepare the fuel. The substrate was a 10 mm long piece of Union Carbide PC-25 carbon with an outer diameter of about 4 mm. The substrate was loaded with 55 mg of a 1: 1 glycerin / propylene glycol mixture and pushed onto the fuel end closer to the oral end of the product. The fuel / substrate combination was inserted 7 mtn into a 70 mm foil-coated tube with a short cellulose acetate filter at the mouth end. The length of the product was about 77 mm.

The product formed significant amounts of aerosol during the first three aspirations and throughout the life of the fuel cell.

Claims (14)

An elongated smoking product, comprising: (a) a burning carbonaceous fuel element (10) located at the ignition end of the smoking product; (b) a physically separate aerosol forming part (12) connected to the fuel element adapted to absorb heat from the fuel element during smoking; (c) means (26) for transmitting the aerosol produced by the aerosol formation part (12) to the user, characterized in that the length of the burning fuel element (10) before smoking is less than about 30 frames and its density is at least 0.5 g / cm 2. Product according to claim 1, characterized in that the fuel element (10) and the aerosol forming part (12) are in a conductive heat exchange ratio. Product according to claim 1 or 2, characterized in that it forms a wet total particulate material which, as measured by the Ames test, has no mutagenic effect. Product according to any one of claims 1-3, characterized in that the length of the fuel element is less than 20 mm. 5. Product according to any one of claims 1-3, characterized in that the length of the fuel element (10) is less than 15 mm. Product according to any of claims 1-5, characterized in that in the fuel element (10) there are several channels (16) running longitudinally thereof. 4i 83382 Product according to any one of claims 1 to 6, characterized in that the fuel element contains koi in an amount of at least 20% by weight. 8. A product according to any of claims 1-6, characterized in that the fuel element contains carbon in a quantity of at least 50 wt. 9. A product according to any one of claims 1-6, characterized in that the fuel element contains carbon in an amount of at least 65-70% by weight. 10. A product according to any one of claims 1-9, characterized in that the product forms at least about 0.6 mg watt of total particulate matter during the first three bursts as it is burned according to the FTC regulations. 11. Product according to claim 10, characterized in that the product forms at least about 1.5 mg of wetted total particulate matter during the first three bursts as it is burned according to FTC regulations. 12. Product according to any one of claims 1-11, characterized in that the product averages at least about 0.8 mq wetted total particle material per blast during the time of at least six blasts as it is burned according to the FTC regulations. Product according to claim 1 or 2, characterized in that a tobacco kit (28) is also placed between the end of the fuel element (10) and the end of the product on the mouth side, whereby the tobacco kit (28) is arranged so that the hot vapors are sucked through the tobacco kit to extract and extend the volatile components without having to smoke the tobacco.