KR20110063585A - Smoking article - Google Patents

Abstract

The present invention relates to a smoking article that may comprise a smoking material rod and a first sheet material comprising one or more diluents. The diluent is present in an amount effective to dilute the exhaust gas from the smoking material rod during combustion.

Description

Smoking article {SMOKING ARTICLE}

Field of invention

The present invention relates to a smoking article comprising an enclosed smoking material rod.

Background of the Invention

Some smoking articles include a rod of smoking material having an outer wrapper and a sheet or wrap disposed between the rod of smoking material and the outer wrapper.

For example, WO 2005/082180 describes a smoking article comprising a smoking material rod having a wrapper around the rod, and a web of material comprising an adsorbent material and a flavoring agent, the web material smoking It is located between the material rod and the wrapper.

WO 2006/023281 and WO 2006/014995 describe cigarettes comprising a tobacco column surrounded by an outer wrap paper, and a partial inner wrap extending longitudinally on the tobacco column. The inner wrap material may contain a humectant.

US 6,997,190 describes a smoking article comprising a smoking material rod surrounded by a wrapping material. The wrapping material comprises a base sheet having a plurality of bands applied to the major surface in the form of a major surface and a pattern, each band having at least two web material layers, at least one of the web material layers being a flavoring agent. It includes. The lapping material may have a coating applied thereto, which may contain a moisturizing agent, for example 1 to 5% by weight of the moisturizing agent of the coating composition.

US 2003/0178039 describes a cigarette comprising a smoking material which forms a smoking rod surrounded by a circumscribing wrapping material around it. The wrapping material bounded around may comprise up to 10% by weight of a humectant. However, the use of adsorbents in such wrapping materials is not described.

US 6,257,243 describes a cigarette comprising a rod with an inner segment of smoking material, a cover for the inner segment, an outer segment of the smoking material and a cover for the outer segment. However, there is no description of the use of the adsorbent in the cover.

However, despite the above teachings, there is still a need in the art to provide improved smoking articles.

Summary of the Invention

It is therefore an object of the present invention to provide an improved smoking article.

According to one embodiment of the invention, the smoking article comprises a first sheet material comprising a smoking material rod, and at least one diluent, said diluent being an amount effective to dilute the exhaust gas from the smoking material rod during combustion. Exists as.

The at least one diluent is preferably from about 5 to 80%, preferably from about 5 to 70%, more preferably from about 10 to 60%, even more preferably from about 20 to 50% by weight of the first sheet material. Present in the sheet material in an amount by weight. Preferably, the diluent forms one or more aerosols selected from the group consisting of polyhydric alcohols, glycerol, propylene glycol, triethylene glycol, esters, triethyl citrate, triacetin, high boiling hydrocarbons, non-polyols, glycols, sorbitol and lactic acid Jay. Triacetin is particularly preferred.

Preferably, the first sheet material further comprises at least one diluent stabilizing means and / or at least one adsorbent. The diluent stabilizing means or adsorbent is preferably an integral component in the first sheet material. Preferably, the diluent stabilizing means or adsorbent is selected from the group consisting of zeolite, sepiolite, clay, silica gel, activated alumina, minerals, resins and carbon, particularly preferably the adsorbent is activated carbon. The activated carbon may preferably be in granular, powder or particulate form and has an average particle size of less than 250 μm, preferably less than 100 μm, preferably less than 50 μm, preferably less than 20 μm. Activated carbon can have any level of activity, and generally high activity carbon is advantageous. Preferably, the activated carbon has an activity level of 30-180%, more preferably 60-120% of carbon tetrachloride.

Preferably, the adsorbent or diluent stabilization means has a loading level of less than 80%, preferably less than 50%, more preferably about 10 to 45% by weight of the first sheet material.

Smoking articles can take many forms. In one embodiment, the first sheet material spans the entire length of the smoking material rod and surrounds the exterior of the smoking material rod. In this embodiment, the first sheet material contains a diluent and acts as a wrapper to provide a support for the smoking material rod.

In another embodiment, the smoking article further comprises a second sheet material, preferably containing no diluent, wherein the second sheet material wraps around the entire length of the smoking material rod. Thus, the second sheet material acts as a wrapper for the smoking article, which provides a support for the smoking material rod. If a second sheet material is provided, the first sheet material may also extend over the entire length of the smoking material rod, or smoking material as the second sheet material is present as a wrapper providing a mechanical support for the smoking material rod It may span only part or a number of individual parts of the length of the rod. The use and positioning of lesser parts will provide flexibility in cigarette design by affecting wrapper diffusion, tar propensity and diluent release.

If both the first and second sheet material layers are provided, the second sheet material is preferably located outside the first sheet material with respect to the axis of the smoking material rod. In one embodiment, the first sheet material is positioned directly between the smoking material rod and the second sheet material. In yet another embodiment, the first sheet material is located inside the smoking material rod and the smoking material is located in a coaxial arrangement between the first sheet material and the second sheet material acting as an outer wrapper. The first sheet material is wound ("Swiss-roll" type of twisted spill arrangement, in which paper of wound / spiral spill is provided at the center of the rod), and with the second sheet material Coaxially located in the smoking material rod.

Preferably, at least one of the first and second sheet materials has a thickness of 20 to 300 μm.

Brief description of the drawings

In order that the present invention may be readily understood and easily carried out, for example, reference will be made to the accompanying drawings in which:

1-8 show enlarged side cross-sectional views of smoking articles incorporating the present invention;

9-11 show an enlarged view from the non-filter end of a smoking article according to the present invention;

12 shows an exploded perspective view of a smoking article incorporating the present invention.

details

Applicant discloses a smoke component resulting from smoking material when a smoking article is produced comprising a smoking material rod and a first sheet material comprising diluent (s) and any adsorbent (s) and / or diluent stabilization means. It was found that the ratio of total tar production was reduced by dilution through the eluted diluent. In addition, the level of smoke component arising from the smoking substance may be reduced by the presence of the first smoking substance. In addition to providing a medium containing a diluent, the first sheet material may further act as a wrapper that does not require an additional wrapper by surrounding the entire length of the rod of smoking material. Alternatively, a second sheet material may be further provided. When the second sheet material forms a wrapper outside of the first sheet material, the applicant finds that the presence of the diluent (s) in the first sheet material does not cause unsightly spotting of the second sheet material. It was.

Thus, a novel and progressive solution to the conventional ongoing problem for improving known smoking materials is described.

When present, the second sheet material may be a wrapper material comprising a web or cast material known to those skilled in the art, such as a cellulose paper web or a reconstituted tobacco sheet material. This may include chemical modifications, coatings or treatments, such as to reduce sidestream smoke or to reduce the tendency to ignite. The second sheet material may or may not have a filler, which may or may not be an adsorbent and / or diluent stabilization means.

The wrapper material is typically continuous around the outer circumference of the smoking material rod. Generally, no wrapper material is provided at the end of the rod, but this form would also fall within the scope of the present invention.

The second sheet material may have a thickness of 5 to 500 μm, for example 10 to 300 μm or 20 to 60 μm.

The first sheet material can be any web material known to those skilled in the art, for example, a cellulose paper web or a reconstituted tobacco sheet material. This may include coating, treatment, or chemical modification. The first sheet material may be provided with a filler. It may comprise adsorbent and / or diluent stabilization means.

According to various embodiments, the first sheet material may be in the same space as the second sheet material, or it may be provided only in one or more individual portions of the length of the smoking material rod. The first sheet material may be located between the second sheet material and the smoking material (which may be referred to as 'inside' the second sheet material), or it may be provided on the surface of the second sheet material facing the smoking material The second sheet material may be provided 'outside'. According to one embodiment, the first sheet material forms a single patch that spans only a portion of the inner surface of the second sheet material around the entire circumference.

If the first sheet material is in the form of multiple parts or patches, such patches may be in any form. For example, such a patch may be in the form of a number of bands spaced apart in the longitudinal direction of the smoking material rod. Alternatively, such patches may be in the form of circumferentially spaced strips that span the whole or part of the length of the smoking material rod. In addition, the patch may be a combination of such bands and strips. The combination of band and strip may be located on the inner surface, the outer surface or both of the second sheet material.

If more than one sheet material is used in the smoking article, eg, if there are multiple strips, patches or complete wraps, each of the sheet materials may be the same or different from the composition from any other sheet material. .

The first sheet material may have a thickness of 5 to 500 μm, for example 10 to 300 μm or 20 to 60 μm. However, materials with thicknesses above this can be used in some forms, for example in longitudinally extending strips.

The first sheet material includes one or more diluents. The inclusion of a diluent enables the production of a smoking article that generates an aerosol comprising smoking material derived smoke, such as tobacco smoke, and one or more eluted diluents when smoking.

Suitable diluents for use in the first sheet material include aerosol-forming means utilizing a broad class of materials known to those skilled in the art. For example, polyhydric alcohols such as glycerol, propylene glycol, sorbitol and triethylene glycol; Esters such as diacetin, triethyl citrate, isopropyl myristate or triacetin, high boiling hydrocarbons, or lactic acid. Combinations of equal or different ratios of diluents may be used. Preferably, the diluent is triacetin, triethyl citrate or isopropyl myristate.

The diluent (s), and the adsorbent material and / or diluent stabilization means in the presence may be provided in any suitable form. Examples include liquid and solids, such as granular, powder, crystal or other particulate forms, such as nanoparticles, molecular cage structures, clathrates.

One or more adsorbent materials and / or diluent stabilization means can be selected from any suitable material known to those skilled in the art. Examples include zeolites, sepiolites, clays, activated alumina, minerals, resins, silica gels and carbon. In a preferred embodiment, the adsorbent material and / or diluent stabilization means is carbon, eg activated carbon. If activated carbon is used, the activation level can be measured by evaluating the percentage of carbon tetrachloride (CTC) as is known in the art. Briefly, carbon is weighed and exposed to CTC, after which the weight of carbon is measured again. The increase in carbon weight is calculated as a percentage.

For optimal use in the present invention, activated carbon will preferably have a high activity and may have an activity of up to 180% of CTC. More preferably, carbon has an activity of 40-160% of CTC. With regard to the selection of one or more adsorbent materials or diluent stabilization means, it should be understood that the adsorbent (s) or diluent stabilization means present in the first sheet material layer may be the same or different from each of the web material layers. That is, where multiple web material layers, strips or bands are used, the adsorbent (s) and / or diluent stabilization means or combinations of adsorbent (s) and / or diluent stabilization means may be combined with each web material layer, strip or band. And may be the same or different.

The first sheet material comprising at least one adsorbent material and / or diluent stabilizing means may be in the form of a paper containing activated carbon.

In one further embodiment of the present invention, the smoking material rod comprises a smoking material center core that is fully enclosed along its length, and an annular rod of smoking material surrounds the center core. The central core may be surrounded by the first sheet material along the entire length, or may be surrounded by the third sheet material having a portion of the first sheet material supported by the third sheet material inside or outside the first sheet material. have. The third sheet material used to surround the central core may be the same or different than the second sheet material surrounding the annular smoking material rod. The smoking article may further comprise a portion of the first sheet material, which may be a band, strip, or a combination thereof located on the inner, outer, or both surfaces of the second sheet material surrounding the annular smoking material rod. Can be.

Whether it is a solid rod or a central core with an annular rod, the smoking material can be any smoking material deemed appropriate in the art. For example, it contains tobacco containing smoking substances, modified tobacco smoking substances such as expanded tobacco, extract tobacco, physical, chemical and / or biochemically modified tobacco or non-tobacco It may be a smoking substance. It may be a droplet and / or injection material. Preferably, the smoking material is a tobacco containing material in combination with a non-cigarette smoking material, or consists of tobacco material alone. Suitably, the tobacco material comprises at least one of stem, lamina and tobacco dust. One example of tobacco material is one containing one or more of the following tobacco types: Virginia or heat-cured tobacco, Burley tobacco, Oriental tobacco, reconstituted tobacco, stem and modified tobacco . Preferably, the smoking material comprises a blend of tobacco material or a blend of tobacco material and non-tobacco material. When present, the central core may contain different smoking materials than the annular rod.

The smoking article may further include a filter component located at one end of the smoking material rod. Such filter component may comprise, for example, an adsorbent material. The filter component may be a multiple filter including multiple sections, for example a double or triple filter. Suitable filters are well known to those skilled in the art. Such filters known in the art include dalmatian filters in which particulate adsorbent material is interspersed with fiber filter materials, such as fiber cellulose materials, and cavity filters in which the cavity portion of a multi-segment filter contains adsorbent material. .

Smoking articles according to the present invention can be readily produced by techniques known in the art.

As mentioned above, FIGS. 1-8 illustrate an enlarged side cross-sectional view of a smoking article of the present invention. Similar materials or structures are denoted by the same reference numerals in the various figures.

1 shows a smoking article 10 comprising a smoking material rod 11 wrapped in a first sheet material 13, and a wrapper comprising a second sheet material 12. The second sheet material 12 spans approximately the entire circumferential surface of the smoking material rod 11. In the embodiment of FIG. 1, the first sheet material 13 is located along approximately the entire inner surface of the second sheet material 12 and separates the second sheet material 12 from the smoking material rod 11.

In an alternative embodiment, when the first sheet material 13 has a strength and rigidity suitable to support the smoking material rod 11, the second sheet material 12 may be omitted and the first sheet material 12 spans the entire length of the smoking material rod 11 and acts as both a wrapper and a diluent containing medium.

The smoking article of FIG. 1 has an overall cigarette form, which means that a filter rod 14 is provided. The filter rod 14 is surrounded by a plug wrap 15, which is connected to the enclosed smoking material rod using a tipping paper 16. Component materials and manufacture of filter rod 14, plug wrap 15, and tipping paper 16 are conventional as is well known in the art.

2 shows a smoking article 10 having a first sheet material 13 positioned between a second sheet material 12 and a smoking material rod 11. In this embodiment, the first sheet material 13 is in the form of a patch covering a portion of the circumference and longitudinal length of the smoking material rod 11. In the embodiment shown in FIG. 3, the first sheet material 13 is provided in multiple patches, some at the ends of the filter rod 14 of the smoking material rod 11, and some of the filter rod 14. On the opposite side of the terminal.

4 shows a smoking article 10 having a first sheet material 13 positioned outside the second sheet material 12. That is, the second sheet material 12 is located between the smoking material rod 11 and the first sheet material 13. In this embodiment, the first sheet material 13 approximately covers the entire outer surface of the wrapper 12.

FIG. 5 shows an embodiment with a circumferential filter end patch of the first sheet material 13 located outside the second sheet material 12.

6-8 show a smoking article 10 having a smoking material coaxial core 17 located within a smoking material rod 11. In FIGS. 6 and 7, the smoking material core 17 is surrounded by a first sheet material 13 spanning the entire length of the smoking material rod 11.

In one alternative embodiment (not shown), the smoking article has the form shown in FIG. 6, and the smoking material coaxial core 17 is located within the smoking material rod 11, but in this embodiment, the inner wrapper and Both outer wrappers are formed from the first sheet material containing the diluent.

In FIG. 8, the smoking material core 17 is surrounded by a third sheet material, which may be the same as the second sheet material 12. The second sheet around the outer circumference of the third sheet material with the first sheet material patch 13 located near the smoking material core 17 and around the outer circumference of the smoking material rod 11 and the smoking material rod 11. It is provided between the materials 12.

9-11 show enlarged views from the non-filter ends of smoking articles. FIG. 9 shows the embodiment of FIG. 1, FIG. 10 shows the embodiment of FIG. 3, and FIG. 11 shows the embodiment of FIG. 7.

12 shows an exploded perspective view of a smoking article 10 having a smoking material rod 11 and a filter rod 14, where the smoking material rod 11 is at the end of the filter rod 14 with a first sheet material 13. ) And the second sheet material 12 is provided outside the entire length of the smoking material rod 11. Plug wrap 15 and tipping paper 16 are provided.

Example  One

A cigarette with 56 mm tobacco rod and 27 mm cellulose acetate filter was prepared with a 24.6 mm circumference. The cigarette did not have terminal ventilation. The description for the second sheet material surrounding the tobacco rod was paper containing mixed fibers and having a permeability of 50 CU and 2% potassium citrate (combustion additive).

The tobacco rod consisted of a blend of heat dried Virginia and Burley lobe tobacco.

A layer of first sheet material containing activated carbon was provided around the entire length and circumference of the tobacco rod. On the outside of the first sheet material, a wrapper of the second sheet material was provided around the entire length and circumference of the tobacco rod. A schematic showing a similar cigarette design is shown in FIG. 1.

The carbon containing first sheet material included 39% fiber and 36% activated carbon. Activated carbon had 100% carbon tetrachloride (CTC) activity.

Four different levels of triacetin diluent were provided on the carbon paper. First, control levels were prepared from non-impregnated carbon containing paper. Test levels included paper impregnated with 10, 19 or 28 mg of triacetin per cigarette.

About two weeks after preparation, the level of triacetin in the smoke was measured (Table 1) and the dilution was calculated (Table 2). Dilution was calculated as [triacetin in smoke (mg / cigarette) / dry particulate material without nicotine (mg / cigarette)] × 100. Cigarettes were stored at 22 ° C. and 60% relative humidity and analysis repeated at 3 and 6 months (Tables 1 and 2), indicating that triacetin was stable in cigarettes.

Table 1. Triacetin (mg / cigarette) in smoke

The control level does not have triacetin diluent in the sheet material, but it is recognized that triacetin is present in the cellulose acetate cigarette filter as used herein, so that triacetin level in the control product is measured.

Table 2. Smoke Dilution (%)

Visual evaluation of cigarettes showed that they did not have unsightly stains throughout the study period.

Example  2

A cigarette with 56 mm tobacco rod and 27 mm cellulose acetate filter was prepared with a 24.6 mm circumference. The description for the second sheet material surrounding the tobacco rod was paper containing mixed fibers and having a permeability of 50 CU and 2% potassium citrate (combustion additive). The tobacco rod consisted of a blend of heat dried Virginia and Burley lobe tobacco.

A 56 mm long tobacco rod with a 16 mm circumference was surrounded by a carbon containing first sheet material and positioned longitudinally within the center of the cigarette tobacco rod. The carbon containing first sheet material included 39% fiber and 36% activated carbon. Activated carbon had 100% carbon tetrachloride (CTC) activity.

The test tobacco design included impregnation of 16 mg triacetin in the carbon containing first sheet material. A control level was prepared which was identical but not impregnated with a carbon containing sheet. A schematic showing a similar cigarette design is shown in FIG. 6.

The sample and control cigarettes were terminally vented to produce a dry particulate material production that did not contain 6 mg nicotine per cigarette. The levels of triacetin in smoke and dilution were obtained (Table 3). Dilution was calculated as [triacetin in smoke (mg / cigarette) / dry particulate material without nicotine (mg / cigarette)] × 100. As is evident from the data below, the test cigarette of Example 2 achieved a dilution of smoke exceeding 22%.

Table 3. Analysis Results

Visual evaluation of cigarettes showed that they did not have unsightly stains.

The foregoing description and examples have been set forth merely to illustrate the invention and are not intended to be limiting. Since modifications of the described embodiments, including the spirit and substance of the invention, may occur to those skilled in the art, the invention should be construed as broadly encompassing all modifications within the scope of the appended claims and their equivalents.

Claims (19)

Smoking material rods; And a first sheet material comprising at least one diluent, wherein the diluent is present in an amount effective to dilute the offgas from the smoking material rod during combustion. The method of claim 1, wherein the at least one diluent is about 5 to 80 weight percent, preferably about 5 to 70 weight percent, more preferably about 10 to 60 weight percent, even more preferably the first sheet material. Smoking article present in the sheet material in an amount of about 20-50% by weight. The diluent of claim 1 or 2, wherein the diluent consists of polyhydric alcohol, glycerol, propylene glycol, triethylene glycol, ester, triethyl citrate, triacetin, high boiling hydrocarbon, non-polyol, glycol, sorbitol and lactic acid. A smoking article that is at least one aerosol former selected from the group. A smoking article according to claim 1, wherein the first sheet material further comprises at least one diluent stabilizing means and / or at least one adsorbent. 5. A smoking article according to claim 4, wherein said diluent stabilizing means or adsorbent is an integral component in said first sheet material. 6. A smoking article according to claim 4 or 5, wherein said diluent stabilizing means or adsorbent is selected from the group consisting of zeolite, sepiolite, clay, silica gel, activated alumina, minerals, resins and carbon. 7. A smoking article according to claim 6, wherein said adsorbent is activated carbon. 8. A smoking article according to claim 7, wherein the activated carbon is in granular, powder or particulate form and has an average particle size of less than 250 μm, preferably less than 100 μm, preferably less than 50 μm, preferably less than 20 μm. 9. A smoking article according to claim 7 or 8, wherein said activated carbon has an activity level of 30-180%, preferably 60-120%, of carbon tetrachloride. 10. The method of claim 4, wherein the adsorbent or diluent stabilizing means is less than 70%, preferably less than 50%, more preferably about 10 to 45% by weight of the first sheet material. Smoking article having a loading level of. The smoking article according to claim 1, wherein the first sheet material surrounds the circumference of the smoking material rod and spans the entire length of the smoking material rod. 12. The overall length of the smoking material rod according to any one of claims 1 to 11, further comprising a second sheet material containing no diluent, the second sheet material surrounding the circumference of the smoking material rod and Smoking goods throughout. 13. A smoking article according to claim 12, wherein the first sheet material spans a portion of the length of the smoking material rod. The smoking article of claim 13, wherein said first sheet material spans a portion of a plurality of rod lengths. The smoking article according to claim 12, wherein the second sheet material is positioned outside the first sheet material with respect to the axis of the smoking material rod. 16. A smoking article according to any one of claims 12 to 15, wherein the first sheet material is positioned between the smoking material rod and the second sheet material. 16. A smoking article according to any one of claims 12 to 15, wherein the first sheet material is located inside the smoking material rod. 18. A smoking article according to claim 17, wherein the first sheet material is wound and positioned in the smoking material rod coaxially with the second sheet material. The smoking article according to claim 12, wherein at least one of the first and second sheet materials has a thickness of 20 to 300 μm.

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