JPH11266851A - Low sidestream smoke-type cigarette - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a low sidestream smoke-type cigarette capable of reducing a sidestream smoke without deteriorating the aroma and taste or natural combustibility. SOLUTION: This low sidestream-type cigarette provided with a wrapper of a double structure for wrapping a filled shredded tobacco 5 therein and an inner wrapper 6 of the wrapper comprises a sheet tobacco formed by the papermaking or a sheet tobacco prepared by drying a slurry. The outer wrapper 8 is a usual cigarette paper. When the inner wrapper 6 is the sheet tobacco prepared by drying the slurry, the inner wrapper 6 wraps the filled shredded tobacco 5 so as to locate the smooth surface thereof on the side of the filled shredded tobacco 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low sidestream cigarette which reduces sidestream smoke during smoking.

[0002]

2. Related Art In order to reduce the sidestream smoke of cigarettes, it is known to reduce the air permeability of the wrapping paper. For example, the permeability of a wrapper decreases as its basis weight increases. However, an increase in the basis weight of the wrapping paper results in an increase in pulp components other than filling chopping such as chopped tobacco in the whole cigarette. In this case, the cigarette cannot continue its natural combustion, and also deteriorates its flavor. Furthermore, wrapping paper having a large basis weight has poor wrapping property of the filling chopping, so-called winding property, and is not suitable for cigarette production.

As another method for reducing the sidestream smoke of cigarettes, it is known to add a large amount of a flame retardant to wrapping paper. This method significantly worsens the flavor and taste of cigarettes. Furthermore, methods using magnesium hydroxide or calcium carbonate having a high specific surface area as a filler for use in wrapping paper have been put to practical use. However, these methods increase the basis weight of the wrapping paper, and as a result, the winding property of the wrapping paper becomes poor. It is not good and the flavor is not good. Related to this,
No. 228059 discloses an outer wrapper made of a wrapping paper containing a filler of magnesium hydroxide and having a specific permeability of 15 Coresta units or less, and a wrapper containing a tobacco material and having a specific permeability of 50 Coresta units or more as an inner wrapper. And cigarettes having a double wrapper structure having the following.

[0004]

In the cigarette having the double wrapper structure described above, the taste of the cigarette is deteriorated due to the outer wrapper containing magnesium hydroxide, and the basis weight of the outer wrapper is large. Therefore, the outer wrapper has a problem in its winding suitability. Further, the inner wrapper has a high inherent air permeability, and thus has a low sidestream smoke reduction effect.

The present invention has been made in view of the above circumstances, and has as its object to reduce the amount of sidestream smoke that can reduce sidestream smoke without impairing its flavor, flammability and rollability. An object of the present invention is to provide a smoke-type cigarette.

[0006]

SUMMARY OF THE INVENTION The foregoing objects are attained by the low sidestream cigarette of the present invention, which comprises a double wrapper wrapping a fill notch, and The inner wrapper is made of impervious sheet tobacco and the outer wrapper is made of cellulose-based wrapper (Claim 1). Here, poor air permeability means that the specific air permeability is low, and the specific air permeability of the inner wrapper is 0.1 to 8.0, preferably 5.0, in units of Coresta.
0 or less. Further, the cellulose-based wrapping paper refers to wrapping paper obtained by adding a filler such as calcium carbonate and a combustion aid such as citrate to a cellulosic base such as flax pulp and wood pulp, and is commercially available as a normal cigarette wrapping paper. It may be what is being done.

According to the above cigarette with low sidestream smoke, the inner wrapper made of a tobacco sheet is inferior in flammability, but the outer wrapper is made of ordinary paper.
It has excellent flammability and functions as a combustion aid for the inner wrapper. Therefore, the low sidestream cigarette can continue its natural combustion, and the fire is not undesirably extinguished.

Further, since the inner wrapper is made of air-impermeable sheet tobacco, generation of sidestream smoke is greatly reduced. The sheet tobacco forming the inner wrapper is a sheet tobacco obtained by using a paper forming technique or a sheet tobacco obtained by drying a slurry spread on a molding surface, so-called slurry sheet tobacco. .

When the slurry sheet tobacco is used as the inner wrapper, the inner wrapper wraps the cut tobacco with the smooth surface on the molding surface facing the filling cut side (claim 2). In this case, the rough surface opposite the inner wrapper forms a number of air pockets with the outer wrapper. The air in such an air pocket assists the combustion of the inner wrapper and ensures that spontaneous combustion of the low sidestream cigarette is maintained.

[0010] The inner wrapper made of sheet tobacco does not deteriorate the palatability during smoking, and the inner wrapper itself can be easily flavored. Further, since the inner wrapper as well as the outer wrapper is also made of sheet tobacco, its winding property is superior to that of wrapping paper containing special additives. Preferably, the basis weight and the specific air permeability of the inner wrapper and the outer wrapper are set as follows, respectively.

In the case of the inner wrapper, the basis weight is 30 to 8
0 g / m ² , and its air permeability is 0.
The outer wrapper has a basis weight of 15 to 30 g / m ² and an air permeability of 15 to 100 in terms of Coresta units (claim 3). When the basis weight of the inner and outer wrappers is in the above range, the winding properties of the inner and outer wrappers are sufficiently ensured. Also,
If the air permeability of the inner wrapper is in the above range, even if the air permeability of the outer wrapper is large as in the above range,
The air permeability of the inner and outer wrappers as a whole is low, and the sidestream smoke can be significantly reduced.

It is preferable that at least a part of the inner wrapper is embossed (claim 4). In this case, the embossing of the inner wrapper increases a substantial thickness of the inner wrapper. This contributes to savings in filling intervals and consequently reduces the amount of sidestream smoke generated. In addition, the amount of sidestream smoke is 10 mg or less per line, and the generation rate of sidestream smoke is 1.0 mg / min or less (Claim 5).
It is desirable that the amount of tar per bottle is 6 mg or less (claim 6).

[0013]

DETAILED DESCRIPTION OF THE INVENTION Referring to FIG. 1, a filter cigarette is shown. This filter cigarette comprises a cigarette 2 and a filter chip 4 connected to one end of the cigarette 2 via a chip paper, and the tar amount is in the range of 1 to 10 mg, preferably 6 mg or less.

The cigarette 2 is composed of a filling notch 5 mainly made of chopped tobacco, and a packaging wrapper for wrapping the filling notch 5 in a bar shape. The packaging wrapper has a double structure. That is, the packaging wrapper includes an inner wrapper 6 that directly wraps the filling notch 5, and the inner wrapper 6.
And an outer wrapper 8 that covers the outside of the wrapper. The inner wrapper 6 is made of a poorly breathable sheet tobacco having low permeability. Such sheet tobacco is a sheet tobacco obtained by a papermaking method, or a slurry sheet tobacco obtained by drying a slurry.

Referring to FIG. 2, there is shown an example of an apparatus for producing a tobacco slurry sheet. This manufacturing apparatus supplies a raw material slurry from a slurry tank 10 to a slurry supply unit 12 via a supply pipe 11. Here, the raw material slurry is obtained by adding a binder containing a sawdust powder and a complex polysaccharide to wood pulp mixed and defibrated in water, and mixing these.

The raw material slurry is extruded from between the belt conveyor 14 and the rollers 16 from the slurry supply device 12 and spread on the belt conveyor 14 in a sheet form. Thereafter, the sheet-like slurry on the belt conveyor 14 is dried by the process of passing through the drying oven 18, the slurry sheet tobacco S _T, and this slurry sheet tobacco S _T
Is separated from the belt conveyor 14 by the doctor blade 20.

As described above, the slurry sheet tobacco _ST
Is formed on the belt conveyor 14, the surface on the belt conveyor 14 side becomes a smoother surface than the other surface. In using the slurry sheet tobacco S _T as the inner wrapper 6 wraps the inner wrapper 6 that smooth surface as apparent inner 3, i.e., the filling increments 5 as a filling increments 5 side . Therefore, the rough surface on the other side of the inner wrapper 6 forms a number of air pockets 9 with the outer wrapper 8.

Here, the inner wrapper 6 has a basis weight in the range of 30 to 80 g / m ² irrespective of paper sheet tobacco or slurry sheet tobacco, and has an air permeability of 0.1 to 8 in Coresta units. .0. When the basis weight of the inner wrapper 6 is out of the above range, the rigidity of the inner wrapper 6 is too weak or too strong, and the winding property is deteriorated. Further, when the air permeability of the inner wrapper 6 exceeds the above range, the sidestream smoke cannot be sufficiently reduced.

On the other hand, the outer wrapper 8 is made of ordinary wrapping paper used for ordinary cigarettes. Here, ordinary wrapping paper refers to one that does not contain any special chemicals or additives for reducing sidestream smoke. More specifically, outer wrapper 8
Is composed of a cellulose base material, an inorganic filler such as calcium carbonate, and a combustion regulator such as citrate.
m ² .

Regarding the amount of sidestream smoke generated from cigarettes,
In order to compare the filter cigarette of the present invention with a filter cigarette using only normal paper and a filter cigarette using a low sidestream smoke paper containing special chemicals and additives, etc. Example and comparative example cigarettes were used.

[0021]

[Table 1]

Here, the sheet tobacco is a slurry sheet tobacco. Also, medium and high permeability wrapping paper is obtained by mixing flax pulp, calcium carbonate and titanium oxide,
1% by weight of citrate (N
a: K = 7: 3). The paper for low sidestream smoke is obtained by mixing flax pulp, calcium carbonate and calcined clay, and the surface thereof is coated with 1% by weight of citrate (Na: K = 7: 3) as a combustion regulator. Have been. The length and perimeter of the cigarette portion of the example and the comparative example are 59 mm and 25 mm, respectively. Table 2 below shows the physical properties of the inner and outer wrappers.

[0023]

[Table 2]

For each of Examples 1 and 2 and Comparative Examples 1 and 2, the amount of sidestream smoke generated was measured using a fishtail collector. Here, the fishtail type collector is shown in FIG. 4 and has a chimney-shaped collector main body 2.
2 is provided. At the upper end of the collector body 22, a Cambridge filter 24 is mounted, and at the lower end thereof, an insertion port for the filter cigarettes C of the embodiment and the comparative example is provided. The filter cigarettes C of the example and the comparative example are mounted on a smoking machine 26. The smoking machine 26 ignites the filter cigarettes C and then performs automatic smoking of the filter cigarettes C under standard smoking conditions. here,
The standard smoking condition is 35cc / 2 for each suction cycle.
This is defined by the suction operation of sec and the subsequent suction stop period of 58 seconds, and this suction cycle is repeated until the combustion length reaches 51 mm.

During the above-mentioned automatic smoking, the collector main body 22 sucks the sidestream smoke generated from the combustion end E of the filter cigarette C together with air toward the Cambridge filter 24 at a rate of 3 liter / min. The above-described automatic smoking and suction of the sidestream smoke are repeated for a predetermined number of filter cigarettes C to be tested. After this, the Cambridge filter 24
Is measured, and the first weight of the particle layer component in the sidestream smoke adhering to the Cambridge filter 24 is calculated. On the other hand, after extracting the particle layer components in the sidestream smoke adhering to the Cambridge filter 24 and the collector main body 22, respectively,
Each of these absorbances was measured, and the ratio of this absorbance and the first
Based on the weight, the second weight of the particle layer component attached inside the collector body 22 is calculated. And these first and second
The first value (mg / cig) of sidestream smoke per filter cigarette C is calculated by dividing the added value of the weight by the number of test filter cigarettes C. Further, the second generation amount (mg / min) indicating the generation speed of the sidestream smoke is calculated by dividing the first generation amount by the burning time required for the automatic smoking.

The above-described smoking test was carried out on each of the filter cigarettes of Examples 1 and 2 and Comparative Examples 1 to 3 by the same number of tests, and the amount of generated sidestream smoke was calculated based on Comparative Example 3. The sidestream smoke reduction rates are shown in Table 3 below.

[0027]

[Table 3]

As is clear from Table 3, the reduction rate of the sidestream smoke per comparison and per hour in Comparative Example 1 and Examples 1 and 2 is sufficiently higher than that in Comparative Example 3.
That is, it can be seen that the generation of sidestream smoke is 10 mg or less per one, and the generation speed is reduced to 1.0 m / min or less. When the comparative example 1 is compared with the examples 1 and 2, although the comparative example 1 is superior in the reduction rate of the sidestream smoke, the comparative example 1 uses a low sidestream smoke wrapping paper. , It is inferior in its flavor and rollability.

Although the cigarettes of Examples 1 and 2 used a slurry sheet tobacco for the inner wrapper, the cigarettes of low side flow using a sheet cigarette for the inner wrapper 6 were also used. Of course, the same results as in Table 3 can be obtained. Table 4 below shows Examples 1 and 2.
In addition to Comparative Example 2 and Comparative Examples 1 to 3, the characteristics of other comparative examples are shown together.

[0030]

[Table 4]

In Table 4, ◎, △, Δ, and × represent excellent, somewhat excellent, slightly inferior, and inferior, respectively, with respect to the characteristics. The wrappers used in Comparative Examples 4 to 8 are as shown in Table 5 below. Is shown in

[0032]

[Table 5]

The high-permeability sheet tobacco used for the inner wrappers of Comparative Examples 5 and 6 has a sufficiently higher air permeability than the inner wrappers 6 of Examples 1 and 2, for example, 1 per coresta unit.
It is in the range of 0-380. As is clear from Table 4, the low sidestream smoke type cigarettes of Examples 1 and 2 are excellent not only in the effect of reducing sidestream smoke, but also in terms of flavor, spontaneous combustion, cut-out saving, and winding property. ing.

Here, the spontaneous combustion will be described in detail. The outer wrapper 8 made of ordinary wrapping paper functions as a combustion auxiliary material for the inner wrapper 6 made of sheet tobacco. Moreover, when the inner wrapper 6 is made of tobacco slurry sheet as described above, a large number of air reservoirs 9 are secured between the inner wrapper 6 and the outer wrapper 8, so that the air in these air reservoirs 9 is kept. Is used for combustion of the inner wrapper 6, and the flammability of the inner wrapper 6 is further improved. As a result, the low sidestream cigarette can reliably continue its natural combustion.

In addition, the notch saving means a reduction in the filling amount of the filling notch 5 in the cigarette 2. More specifically, the low sidestream smoke-type cigarettes 2 of Examples 1 and 2 have a double structure as a whole wrapper, and the inner wrapper is made of highly rigid sheet tobacco. Can give a sense of touch. That is, as a result of the increase in the surface hardness of the cigarette 2, the filling amount of the filling notch 5 required to secure the surface hardness of the cigarette 2 can be reduced.

Since the wrappers of Examples 1 and 2 are excellent in the winding property of the inner and outer wrappers, the cigarette is a low sidestream smoke type cigarette which has high productivity, and is excellent in cutout reduction and flavor. As is clear from Table 4, Comparative Example 4 is not only inferior in maintaining natural combustion, but also is not a smoking article falling in the category of cigarettes. As is clear from Table 4, Comparative Examples 5 to 7 in which a high-permeability sheet tobacco was used for the inner wrapper could reduce the sidestream smoke to some extent, but the effect was as in Examples 1 and 2.
Is inferior to the inner wrapper 6 because of its higher air permeability. In Comparative Examples 5 to 7, since air easily permeates through the inner wrapper, the flavor of the inner wrapper 6 and the filling notch 5 is diluted with air, and the flavor is inferior to Examples 1 and 2 in terms of flavor. In addition, in the case of Comparative Example 7, the outer wrapper is made of low sidestream smoke wrapping paper, so that its winding property is inferior.

Comparative Example 8, in which the wrapper is made of only low sidestream smoke wrapper, exerts a certain effect only on the reduction of sidestream smoke, but is inferior in other respects. The low sidestream cigarette of the present invention relates to its inner wrapper 6,
Whether the inner wrapper 6 is a sheet tobacco or a slurry sheet tobacco, further improvements can be made. That is, since the inner wrapper 6 has a higher basis weight and a sufficient thickness as compared with ordinary wrapping paper, the entire area can be easily embossed as shown in FIG. Such embossing increases the thickness of the inner wrapper 6 due to the unevenness 7, so that the filling amount of the filling step can be further reduced. As a result, not only can the total cost of the production of filter cigarettes be reduced,
The generation of sidestream smoke can also be reduced.

Further, the embossed inner wrapper 6
Since the softness of the cigarette is moderately increased, the rollability of the cigarette is improved without impairing the feel of the cigarette. Further, the inner wrapper 6 has excellent frictional engagement with the filling notch 5 due to its embossing, and also helps to prevent the filling notch 5 from falling off the cut end of the cigarette, that is, to prevent so-called dropping. In addition, in order to prevent only the tip of the filling notch 5 from falling,
Embossing may be applied only to the region of the inner wrapper 6 located at the tip of the cigarette.

[0039]

As described above, according to the low sidestream smoke type cigarette of the present invention (claims 1 to 5), the entire wrapper has a double structure of an inner wrapper and an outer wrapper. Since the wrapper is made of paper sheet tobacco or slurry sheet tobacco, its air permeability is sufficiently low. Therefore, by employing the inner wrapper made of sheet tobacco, it is possible to effectively reduce the generation of sidestream smoke without impairing the flavor.

Further, since the outer wrapper is a normal wrapping paper, it functions as a combustion aid for the inner wrapper, and the flammability of the inner wrapper is improved. In particular, when the inner wrapper is made of tobacco slurry sheet and the smooth surface faces inward (claim 2), a large number of air pockets are secured between the inner wrapper and the outer wrapper, so that the inner wrapper is burned. This further improves the performance and ensures that the low sidestream cigarette maintains its natural combustion. Further, both the inner wrapper made of sheet tobacco and the outer wrapper made of wrapping paper have good winding properties, and are excellent in productivity of low sidestream cigarettes.

If the amount of tar per bottle is suppressed to 6 mg or less (claim 6), the taste can be reduced in addition to the reduction of sidestream smoke.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a filter cigarette of one embodiment in a partially cutaway manner.

FIG. 2 is a schematic view showing a sheet cigarette manufacturing apparatus.

FIG. 3 is a partially enlarged sectional view of the filter cigarette of FIG. 1;

FIG. 4 is a schematic diagram of a fishtail type collector.

FIG. 5 is a partial cross-sectional view of a cigarette in which an inner wrapper has been embossed.

[Explanation of symbols]

 5 Filling notch 6 Inner wrapper 7 Unevenness (embossed) 8 Outer wrapper

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Toru Sakurai 1-17-7 Yokokawa, Sumida-ku, Tokyo Inside Japan Tobacco Inc.

Claims (6)

[Claims] 1. A filling notch including cut tobacco, an inner wrapper formed of a non-breathable sheet tobacco and enclosing the filling notch, and an outer wrapper covering the outer side of the inner wrapper and made of cellulose-based wrapping paper. A low sidestream smoke type cigarette characterized by that. 2. The inner wrapper is a sheet tobacco obtained by drying a slurry spread on a molding surface, wherein a smooth surface on the molding surface side faces the filling cut side. The low sidestream smoke type cigarette according to claim 1, wherein 3. Regarding the basis weight and specific air permeability of the inner wrapper and the outer wrapper, in the case of the inner wrapper, basis weight = 30 to 80 g / m ² , air permeability = 0.1 to 8.0 in Coresta units, The low sidestream cigarette according to claim 1, wherein the outer wrapper has a basis weight of 15 to 30 g / m ² and an air permeability of 15 to 100 in units of coresta. 4. The low sidestream smoke type cigarette according to claim 1, wherein said inner wrapper has a region at least partially embossed. 5. The sidestream smoke is less than 10mg per one,
The low sidestream smoke type cigarette according to any one of claims 1 to 4, wherein the generation speed of the sidestream smoke is 1.0 mg / min or less. 6. The low sidestream cigarette according to claim 1, wherein the amount of tar per one is 6 mg or less.