JP2016101169A - Smoking article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low ignition propensity smoking article comprising a packed smokable material rod without requiring addition of extra expense to the overall cigarette production process by the use of a burn suppressant.SOLUTION: A low ignition propensity smoking article comprises: a smokable material rod; an inner wrapper 8 comprising reconstituted tobacco material wrapped around smokable material; and an outer wrapper 9 wrapped around the smokable material and the inner wrapper 8. The permeability of the inner wrapper 8 is in the range from 5 Coresta (CU) to 50 Coresta. The permeability of the outer wrapper 9 is in the range from 25 Coresta to 100 Coresta. The inner and outer wrappers 8, 9 do not comprise bands of burn suppressant material.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a low fire spread smoking article comprising a packaged smoking material rod.

  As used herein, the term “smoking article” refers to smokeable products such as cigarettes, cigars and cigarillos, whether based on tobacco, tobacco derivatives, expanded tobacco, recycled tobacco or tobacco substitutes. And products that generate heat but do not burn.

  Traditionally, low flame spread (LIP) cigarettes have been manufactured by providing a cigarette paper developed exclusively for it with a band of combustion inhibitors extending in its circumferential direction. The flame retardant band is designed to reduce the burning rate of the tobacco rod and to self-extinguish the cigarette if the smoker does not regularly inhale with a filter.

  ASTM E2187-04 details a standard test that can assess the ignitability of a smoking article. In some countries, regulations may require that low fire spread smoking articles meet certain requirements when tested in accordance with ASTM E2187-04. For example, when tested in accordance with ASTM E2187-04, national regulations may require that at least 75% of 40 LIP smoked test samples self-extinguish before burning to the end of the tobacco rod. is there.

  The development of certain LIP cigarette papers with a flame retardant band has allowed the tobacco industry to produce cigarettes that meet the regulatory requirements of LIP smoking articles according to ASTM E2187-04.

  In the manufacture of cigarette paper incorporating a flame suppressant band, LIP cigarette paper is obtained by attaching a flame suppressant band to a preformed base paper. The application process of the combustion inhibitor is generally performed separately from the assembly of the cigarette, and requires a dedicated device for attaching the combustion inhibitor to the base paper. The use of combustion inhibitors also adds additional costs to the entire cigarette manufacturing process.

  The present invention relates to a low fire spread smoking article comprising a smoking material rod, an inner wrapper including a regenerated tobacco material wound around the smoking material, and an outer wrapper wound around the smoking material and the inner wrapper. provide.

    The inner and outer wrappers may not include a band made of a combustion suppressing material.

  The circumference of the smoking article may be between 15 mm and 22 mm.

  The circumference of the smoking article may be between 15 mm and 19 mm.

  The circumference of the smoking article may be between 15 mm and 17 mm.

  The circumference of the smoking article may be between 16.9 mm and 17.0 mm.

  The circumference of the smoking article may be between 20.5 mm and 21.5 mm.

  The length of the smoking article may be between 80 mm and 120 mm.

  The length of the smoking article may be between 82 mm and 84 mm.

  The air permeability of the inner wrapper may be 40 CU or less.

  The air permeability of the inner wrapper may be 25 CU or less.

  The air permeability of the inner wrapper may be 15 CU or less.

  The air permeability of the inner wrapper may be 10 CU or less.

  The outer wrapper's air permeability may be between 25 and 100 CU.

  The air permeability of the outer wrapper may be between 70 and 100 CU.

  The inner wrapper may be a regenerated tobacco material such as a regenerated tobacco sheet.

  The outer wrapper may be low sidestream smoke cigarette paper.

  The smoking article may be a cigarette including a filter, a smoking material rod, and a tipping paper that covers a portion of the filter and the smoking material rod for axial joining.

  In a LIP test according to ASTM E2187-04 performed on multiple cigarettes, for example 40 cigarettes, at least 75% of the cigarettes self extinguish before the burned end of the rod reaches the tipping paper.

  The present invention provides a method of forming a low fire spread smoking article comprising wrapping an inner wrapper comprising regenerated tobacco material around a smoking material rod and wrapping an outer wrapper around the smoking material rod and the inner wrapper.

  For purposes of illustration only, some embodiments of the invention are described below with reference to the accompanying drawings.

It is a perspective view of the low fire spread smoking article containing the smoking material rod wound around the first and second wrappers. FIG. 2 is a perspective view of a partially assembled smoking material rod for a low fire spread smoking article. The rod includes a cigarette core wrapped in an inner wrapper and a partial outer wrapper. Figure 3 shows an end face of a smoking material rod having a smoking material core, an inner wrapper wrapped around the smoking material core and an outer wrapper wrapped around the inner wrapper.

  An example of a low flame spread (LIP) smoking article 1 is shown in FIG.

  A smoking article 1 shown in FIG. 1 is a LIP cigarette 1 having a filter 2 and a rod 3 of smoking material such as tobacco. However, the smoking article 1 may be another type of smoking article, such as one of those described above.

  The filter 2 and the rod 3 are joined axially by a sheet of tipping paper 4 that covers a portion of these, and this chipping sheet is applied to the outer surface of the rod 3 and the filter 2 in a conventional manner to secure the two. Fixed around. The dotted line in FIG. 1 represents the position of the single contact surface between the filter 2 and the rod 3 partially covered by the chipping paper 4.

  When a plurality of, for example, 40 smoking articles 1 are tested according to ASTM E2187-04, 75% or more of these smoking articles 1 are self-extinguishing before the burning end of the smoking material rod 3 reaches the tipping paper 4 To do. Therefore, these smoking articles of 25% or less burn the smoking material rod over its entire length.

  The filter 2 may have a substantially cylindrical shape having a conventional structure. For example, a substantially cylindrical plug made of a filter material containing cellulose acetate tow may be wrapped around the circumferential surface with a plug wrapper sheet. Any type of filter 2 can be used, for example carbon and / or a more complex filter 2 comprising one or more flavor materials for flavoring the gas flow through the filter 2. The filter 2 may be ventilated with a ventilation groove formed using laser or electrostatic drilling techniques. The ventilation groove may occupy between 20% and 80% of the overall ventilation rate, preferably between 50% and 70%.

  The rod 3 may be substantially cylindrical having an outer diameter substantially equal to the outer diameter of the filter 2. Referring to FIG. 2, the rod 3 includes a substantially cylindrical core composed of filled tobacco material 7 wrapped in a first wrapper 8 and a second wrapper 9. The tobacco material 7 may include a blend of chopped tobacco and may include regenerated tobacco material. In the example described later, the first wrapper 8 is located inward of the second wrapper 9, and thus is located closer to the core of the tobacco material 7 than the second wrapper. Therefore, the first wrapper 8 is referred to as an inner wrapper 8 in this specification. The second wrapper 9 is located outside the first wrapper 8 and is therefore referred to as the outer wrapper 9. The outer wrapper 9 forms the outer surface of the rod 3, and the inner wrapper 8 is located between the outer surface of the core of the tobacco material 7 and the inner surface of the outer wrapper 9.

The inner wrapper 8 is a sheet-like wrapping material containing recycled tobacco material, and may be configured to provide different desired flavor and sensory characteristics to the smoking article. For example, the inner wrapper 8 may include a regenerated tobacco sheet or may be composed of a regenerated tobacco sheet, and the regenerated tobacco sheet may include one or more types of regenerated tobacco material, or one or more types of regenerated tobacco sheets. It may be made of tobacco material. Regenerated tobacco sheets can include a range of different tobacco species selected to provide a good tobacco taste and flavor to cigarette smokers. For example, the regenerated tobacco material may include one or more of sunlight dried tobacco, dark air dried tobacco, fire dried tobacco or any suitable tobacco species. The air permeability of the inner wrapper 8 may be in the range between 5 cores (CU) and 50 cores, preferably between 17 and 38 cores. The thickness of the inner wrapper 8 layer may be any value in the range between about 85 microns and about 121 microns. The dry basis weight of the inner wrapper 8 may be any value between about 35 g / m ² and about 45 g / m ² . The diffusivity of the inner wrapper 8 may be any value between about 0.8 cm / second and about 2.8 cm / second.

  Examples of three specific inner wrappers 8 that can be used are shown in Table 1 below. The inner wrappers 8 shown in Table 1 are all recycled tobacco material sheets.

  As shown in FIG. 2, the inner wrapper 8 extends around the circumferential surface of the core of the tobacco material 7. For example, referring to FIGS. 2 and 3, the inner wrapper 8 may extend completely around the core 7 and along the axial length of the rod 3. The inner wrapper 8 may thereby cover substantially the entire circumferential surface of the core 7. Alternatively, the inner wrapper 8 may extend partially around the circumference of the core 7 and / or along the length of the rod 3. Thus, the inner wrapper 8 may include a patch that lies under the entire length of the outer wrapper 9. The end surface of the core 7 is opened so that the gas flow enters and exits the rod 3 at the distal end and the filter end, respectively.

  The outer wrapper 9 is also a sheet-like packaging material, and includes, for example, cigarette paper or low sidestream smoke (LSS) cigarette paper or is made of cigarette paper or low sidestream smoke (LSS) cigarette paper. Alternatively, the outer wrapper 9 may include a plurality of types of cigarette paper and / or LSS cigarette paper, or may be configured with a plurality of types of cigarette paper and / or LSS cigarette paper.

Dry basis weight of the outer wrapper 9 may be any value between about 28 g / ^{m 2} to about 40 g / ^{m 2,} the fibers of about 16.0 g / ^{m 2} to about 32.0 g / ^{m 2} Between
The potassium citrate may be between about 0.3 g / m ² and about 2.0 g / m ² , the magnesium oxide may be between 0 g / m ² and about 2 g / m ² , and the calcium carbonate is about It may be between 4 g / m ² and about 11 g / m ² . Other ranges may be used. The total filling amount of the outer wrapper 9 may be any value between about 6 g / m ² and 10 g / m ² , and the total filling rate in terms of weight may be between about 15% and 40%. That's fine. Other ranges may be used.

  The outer wrapper air permeability 9 may be any value between about 25 coresta and about 100 coresta. Within this range, the air permeability of the cigarette paper may be about 25 coresta, and the air permeability of the LSS cigarette paper may be between about 70 coresta and about 100 coresta. The diffusivity of the outer wrapper 9 may be any value between about 0.30 cm / sec and about 0.50 cm / sec.

Examples of three specific outer wrappers 9 are shown in Table 2 below. Example 1 is cigarette paper, and LSS1 and LSS2 are low sidestream smoke cigarette papers. LSS1 is ventilated by electroporation (EP) and has an air permeability of 70 cholesterol units. LSS2 is also ventilated by electroporation and has a permeability of 100 Coresta units.

  The outer wrapper 9 may extend around the outer peripheral surface of the inner wrapper 8. For example, as shown in FIGS. 1 to 3, the outer wrapper 9 may extend completely along the outer circumference of the inner wrapper 8 and the axial length of the rod 3. The entire outer peripheral surface is covered. In this way, the outer wrapper 9 wraps both the inner wrapper 8 and the core of the tobacco material 7. The end surface of the rod 3 may remain open, and the gas flow may flow in the rod 3 in the axial direction. In the example shown in FIGS. 1 to 3, the outer surface of the outer wrapper 9 forms the outer surface of the rod 3, to which the chipping paper 4 is bonded at the end of the filter.

  In terms of dimensions, the cigarette 1 has an outer circumference of about 16.96 mm and an overall length of about 83 mm (before smoking). The length of the rod 3 (before smoking) is about 56 mm, and the length of the filter 2 is about 27 mm. Of course, these dimensions can be varied. For example, the outer circumference of the cigarette 1 may be any value between 15 mm and 22 mm, and the total length of the cigarette 1 may be any value between 80 mm and 120 mm. The outer circumference may be about 21 mm, for example. The total length of the cigarette 1 can be changed by increasing or decreasing the length of either or both of the rod 3 and the filter 2.

The cigarette 1 does not include a specially developed LIP cigarette paper that has a band of flame retardant designed to limit the burning rate of the rod 3. Therefore, the manufacture of the cigarette 1 does not require the production of a specially developed banded LIP cigarette paper in advance, and thus does not require special equipment required to apply a combustion inhibitor to the cigarette paper.

A fire spread test conducted on a sample of 40 cigarettes 1 shows that a number of cigarettes 1 well below 25% burned to tipping paper 4 when tested according to ASTM E2187-04. For example, Table 3 below shows six different according to the present invention.
The fire spreadability of the sample cigarette 1 (sample 1-6) is shown. For each sample cigarette (1-6), 40 cigarettes were tested according to ASTM 2187-04. The rightmost column of Table 3 shows the percentage of cigarettes that do not self-extinguish before the burning end of the smoking material rod 3 reaches the tipping paper 4.

  Accordingly, the cigarette 1 has LIP characteristics equivalent to a cigarette including a specially developed LIP paper, but can be manufactured without the need for manufacturing such a LIP paper.

  The cigarette 1 has a relatively large number of puffs compared to a cigarette wound with a single sheet of paper. For example, when smoking under the ISO standard, the average number of puffs of cigarettes wrapped with a single outer wrap # 1 (see Table 2 above) is about 6.5 compared to the average of cigarettes 1 The puff number is about 7.5.

  The diffusivity of the cigarette 1 combined with the inner wrapper 8 and the outer wrapper 9 is equivalent to the diffusivity of a specially developed LIP cigarette paper having a band of combustion inhibitor. The diffusion value of the combination of the inner wrapper 8 and the outer wrapper 9 may be any value between 0.080 cm / s and 0.095 cm / s.

  The cigarette 1 has a lower amount of sidestream smoke than a control cigarette made of commercially available materials.

For example, Table 4 below shows the elements of sidestream smoke when the six cigarettes 1 (Sample 1-6) shown in Table 3 are taken as an example. Table 4 also shows the sidestream smoke elements of two control cigarettes wrapped with a piece of paper. The cigarette density of all the cigarettes in Table 4 is 263 g / cm ³ with a moisture content of 13.5%. The tobacco blend used for the tobacco rod 3 is the control #
Same for all cigarettes except one.

  As can be seen from Table 4, dry particulates (NFDPM) and nicotine excluding nicotine in the sidestream smoke are significantly reduced compared to the control cigarette.

  Visible sidestream smoke generated from the cigarette 1 according to the present invention is also reduced compared to a control cigarette made from commercially available materials. For example, the amount of visible sidestream smoke generated by cigarette 1 is about 40% to 60% less than control cigarettes wrapped only with outer wrapper # 1 (see Table 2 above). The amount of visible sidestream smoke is least when the outer wrapper 9 includes LSS cigarette paper. Any of the LSS papers described above can be used.

  The reduction rate of visible sidestream smoke compares the photo of the burning control cigarette with the corresponding photo of the cigarette 1 according to the present invention, and the difference in the number of pixels of these two photos representing sidestream smoke. Is calculated by counting.

Table 5 shows the visible sidestream smoke from the three examples of cigarette 1 (samples 4-6), along with the visible sidestream smoke from the control cigarette (control 2). ing. The reduction rate of the sidestream smoke is calculated using the method using the above-mentioned photograph and is measured at the length of the rod 3 burned at the same rate. The filter, tobacco density and tobacco blend used for rod 3 are the same for all cigarettes shown in Table 5. The tobacco density is 263 g / cm ³ with a moisture content of 13.5%.

  An example of a method for manufacturing the cigarette 1 will now be roughly described. Starting with filter 2, as known in the art, a substantially continuous cellulose acetate tow is fed to the funnel and provided with a generally cylindrical body made of cellulose acetate material, from the filter material. Can be formed. The cellulose acetate material passes through a garniture that attaches the plug wrapper from the plug wrapper reel to the filter material. The filter material wound in this way with a wrapper is then cut into individual segments for use in making the filter 2. The length to cut | disconnect should just be a suitable length for producing the two cigarettes 1 or the individual cigarette 1 arranged in series as needed. As a multi-step process, the filter material is first cut into lengths for use with a plurality of cigarettes 2 and then cut into lengths suitable for use in the manufacture of a series of cigarettes 1 or in series. Cutting may be performed.

  The cigarette 1 can be assembled using a suitable rod making machine equipped with a chipping unit. The inner wrapper 8 and the outer wrapper 9 are supplied as bobbins having a length of about 2500 m and a width of 16.2 mm, respectively. Depending on the circumference of the desired cigarette, the width can be 15.8 mm, 18.5 mm, 20.0 mm or 23 mm. The wrappers 8, 9 are pulled from a bobbin carrier located next to the rod making machine and are simultaneously guided to the garniture by a series of rollers and paper guides for cigarette assembly. The inner wrapper 8 from the inner wrapper bobbin is wound around the column-shaped smoking material and at the same time is wound by the outer wrapper 9 from the outer wrapper bobbin. The relative position of the inner wrapper 8 and the outer wrapper 9 can be adjusted in a rod making machine to adjust the size of the overlapping seam of each wrapper 8,9.

  Alternatively, assembling the cigarette 1 may include cutting the inner wrapper 8 into a patch and attaching the patch 8 to the inner surface of the outer wrapper 9 in a gluing process. A combination of the outer wrapper 9 and the patch 8 can be fed to the garniture for winding on a smoking material column.

  Variations of the above method can be used alone or in combination to achieve the effects of the present invention. It will be appreciated that the cigarette 1 may alternatively be another type of smoking article such as a cigar or cigarillo.

Claims (15)

A smoking rod,
An inner wrapper with a breathability of between 5 and 50 CU comprising recycled tobacco material wrapped around the smoking material;
A low fire spread smoking article comprising a smoking material and an outer wrapper having an air permeability between 25 and 100 CU wrapped around the inner wrapper.   The smoking article according to claim 1, wherein the inner and outer wrappers do not include a band made of a combustion suppressing material.   The smoking article according to claim 1 or 2, wherein the circumference is between 15 mm and 17 mm.   The smoking article according to any one of claims 1 to 3, wherein the circumference is between 16.9 mm and 17.0 mm.   The smoking article according to any one of claims 1 to 3, wherein the circumference is between 20.5 mm and 21.5 mm.   The smoking article according to any one of claims 1 to 5, wherein the length is between 80 mm and 120 mm.   The smoking article according to any one of claims 1 to 5, wherein the length is between 82 mm and 84 mm.   The smoking article according to any one of claims 1 to 7, wherein the inner wrapper has an air permeability of 40 CU or less. The smoking article according to any one of claims 1 to 7, wherein the inner wrapper has an air permeability of 25 CU or less.   The smoking article according to any one of claims 1 to 7, wherein the inner wrapper has an air permeability of 15 CU or less.   The smoking article according to any one of claims 1 to 10, wherein the outer wrapper has an air permeability of between 70 and 100 CU.   The smoking article according to any one of claims 1 to 11, wherein the inner wrapper is recycled tobacco paper.   The smoking article according to any one of claims 1 to 12, wherein the outer wrapper is a low sidestream smoke cigarette paper.   The smoking article according to any one of claims 1 to 13, which is a cigarette. Winding an inner wrapper around the smoking material rod with an air permeability between 5 and 50 CU, including recycled tobacco material, and winding an outer wrapper around the smoking material rod and the inner wrapper with an air permeability between 25 and 100 CU A method of forming a low fire spread smoking article comprising:

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