JP5882297B2 - Perforated cigarette paper - Google Patents

Description

  The present invention relates to a cigarette paper that provides self-extinguishing to a cigarette produced therefrom and has at least one separate perforated area (perforated area).

  Due to the legal restrictions regarding self-extinguishing of cigarettes, the cigarette industry needs to provide cigarettes that ensure this self-extinguishing. Cigarettes that are left unfired should thus be prevented from igniting furniture, beds and other household fabrics. Accordingly, there is a need to produce cigarettes that are less prone to ignite these materials, even if the smoked cigarette comes into contact with other materials.

  A test to determine the flammability of cigarettes is described in ASTM E2187-04b. This test consists of placing a smoked cigarette on a substrate composed of 10 layers of filter paper. This test is performed on 40 cigarettes to determine the percentage of cigarettes that self-extinguish on the substrate before the red hot (flameless) cones reach the tobacco filter.

  Within the scope of the present invention, self-extinguishing means, for example, that at least a majority of the cigarettes tested according to ASTM E2187-04b meet the above criteria, ie that the percentage exceeds 50%. Can be understood.

  A typical cigarette is made up of cigarettes that are wrapped with a cigarette and together with the cigarette form a typically cylindrical tobacco rod. The tobacco rod is typically joined with a filter typically made of cellulose acetate (acetate) fibers. These filters and tobacco rods are wrapped with chip paper. This chip paper connects the filter to the tobacco rod.

  The self-extinguishing of cigarettes is in most cases achieved by a corresponding design of the cigarette, ie the paper that encloses the cigarette. Tobacco wrappers are designed so that the diffusion coefficient is so low that at least in some areas of the tobacco wrapper, there is insufficient oxygen to reach the red-hot cone to maintain the smoldering process. As a result, smoked cigarettes self-extinguish.

A typical tobacco wrap consists of cellulose fibers derived from wood, flax and other materials. Mixtures of cellulose fibers of various origins can also be utilized. Cigarette paper wrapper has the typical basis weight from 10 g / ^{m 2} of 60 g / ^{m 2,} the range of 20 g / ^{m 2} of 35 g / ^{m 2} is generally preferred.

  Tobacco wrappers often also contain inorganic mineral fillers added to the paper in a mass ratio of 10% to 40%. A frequently used filler material is chalk (calcium carbonate), but other oxides and carbonates such as magnesium oxide and aluminum hydroxide can also be used.

  Tobacco wrappers can also include combustion salts that increase or decrease the burning rate of the paper. Sodium citrate and tripotassium citrate, and mixtures thereof are used fairly frequently and are added to the paper in amounts of 0% to 5% of the paper weight. However, the technically relevant groups of combustion salts include citrate, malate, tartrate, acetate, nitrate, oxalate, fumarate, gluconate, glycolate, lactate, Also included are oxalate, salicylate, alpha-hydroxycaprylate, and phosphate.

  Tobacco wrappers are typically manufactured in rolls having a width of 0.3 to 5 m and recut into bobbins having a width (typically 9 to 35 mm) derived from the circumference of the cigarette, for example. Is done.

One possible way to achieve self-extinguishing is to select a cigarette paper whose diffusion coefficient is already low enough that the cigarette disappears alone as a result of the papermaking process. However, as a result, the flow of air into the cigarette, that is, the air permeability, is greatly reduced due to the differential pressure. This has proven to be disadvantageous. It can only slightly dilute the smoke in the cigarette rod in the cigarette by the air that flows in during the smoking process, and is a numerical value for cigarette smoke tar, nicotine, and especially carbon monoxide (cigarettes). This is because the smoke value) increases considerably. For example, the air permeability of such paper is less than 10 CORESTA units (1 CORESTA unit = 1 CU = 1 cm ³ / (cm ³ · min · kPa)), whereas a typical cigarette paper that is not self-extinguishing is 20 CU. To 300 CU of air permeability.

  This disadvantage is eliminated by perforating the cigarette paper over its entire surface. Thus, large pores are created in the paper compared to the natural pore structure, increasing the air permeability of the paper, but making only a slight change to the diffusion coefficient. Thus, diluting air can flow into the cigarette during the smoking process, and the cigarette smoke value is reduced in the test described above without compromising the self-extinguishing properties of the cigarette made from this paper.

  This drilling can be done by various methods. For example, electrostatic perforation is used, in which the paper is transported through one or more spark discharge gaps, which burn the paper and open holes. These holes typically have a diameter of 5 μm to 100 μm. In addition, laser drilling can be used, but this laser drilling produces slightly larger holes with typical diameters of 50 μm to 500 μm. A further example is mechanical drilling, in which a needle or similar tool creates a hole in the paper. These holes have a typical diameter of 100 μm to 2000 μm.

  The air permeability achieved with these drilling methods can be very high, for example up to 6000 CU. However, tobacco webs are typically perforated so that the air permeability after perforation is between 50 CU and 500 CU.

  The perforation process can be performed in the width of a roll or bobbin with an independent dedicated perforator after paper making. Of course, perforation in a cigarette maker by any desired perforation method, ie perforation before, during or after manufacture of cigarettes and similar tobacco products from tobacco cigarettes in a cigarette maker. Is possible.

  However, perforations over the entire surface of the cigarette paper (which has a low initial air permeability) have serious drawbacks in terms of smoker's acceptance in cigarettes made from this paper. Yes. Because of the high air permeability, a large amount of diluted air can flow into the cigarette during the smoking process. And the tobacco rod and therefore the perforated tobacco web also burns down during the smoking process. Thus, each time a smoker inhales with a smoked cigarette, as well as during the process of smoked smoke, the passage area through which dilution air can flow into the cigarette decreases. Thereby, the amount of tar, nicotine, and carbon monoxide that the smoker wears increases as the tobacco rod is shortened accordingly with each inhalation. Thus, the smoker feels that the cigarette gradually becomes “stronger” with each inhalation. This feeling is undesirable.

  One possibility to compensate for this effect is that instead of choosing a constant air permeability over the entire length of the tobacco rod, perforation on the side of the cigarette results in a continuous air permeability distribution along the cigarette axis. That is. As a result, during the smoking process, the increase in cigarette smoke numbers with each inhalation is reduced to the maximum possible extent. Thus, the perforations should create a continuous air permeability distribution that is repeated across the tobacco web.

  Although this method is theoretically possible, a practical technical problem arises. On the one hand, the adjustment of the drilling device to create such a continuous distribution is very demanding and the continuous measurement of the air permeability for the adjustment is only inaccurate. Cannot be executed at high speed. The speed at which such a distribution can be created is still reasonably low, if at all possible.

  On the other hand, the continuous tobacco rod formed from the cigarette paper in a cigarette making machine is used to make the continuous air permeability distribution in the correct position on the finished cigarette. It must be cut precisely at the beginning and end of the permeability distribution. However, the beginning of the distribution can only be detected very inaccurately, even if it is due to the continuous progression of air permeability.

  The object of the present invention is therefore to overcome the drawbacks of the prior art.

  An object of the present invention is a cigarette paper, which provides self-extinguishing properties to a cigarette produced from the cigarette and comprises at least a first separation area, the first separation area being perforated, This is achieved by a cigarette wrapping characterized by having an air permeability greater than the air permeability other than the first perforated area.

  In one embodiment of the cigarette wrapper, the air permeability within the first perforated area is constant throughout the perforated area.

  In one embodiment of the cigarette paper, the air permeability in the first perforated area is from 50 CU to 2000 CU, preferably from 100 CU to 1000 CU.

  In one embodiment of the cigarette paper, the width of the first perforated area is 2 mm to 25 mm, preferably 4 mm to 12 mm, more preferably 5 mm to 9 mm.

  In one embodiment, the cigarette paper further comprises a short side A intended to face the filter in the finished cigarette, and the first perforated area is the cigarette paper length closer to the short side A. Within one third of the length, preferably within one quarter of the length of the tobacco web closer to the short side A, more preferably 5 minutes of the length of the tobacco web closer to the short side A 1 is disposed within the range.

  In one embodiment, the cigarette paper further comprises a short side A that is intended to face the filter (6) in the finished cigarette, and the cigarette paper length closer to this short side A is two minutes. The average air permeability within one or a third range is greater than the average air permeability of the remainder of the tobacco web.

  In one embodiment, the cigarette paper comprises at least a second separation area, the second separation area being perforated and separated from the first perforated area by an unperforated area.

  In one embodiment of the cigarette wrapper, the second perforated area is further from the first short side than the first perforated area.

  In one embodiment of the cigarette wrapper, the air permeability in the second perforated area is lower than the air permeability in the first perforated area.

  In one embodiment, the tobacco web comprises at least one further separation area, the further separation area being perforated and the first perforated area and the second by the at least one unperforated area. Separated from the perforated area.

  In one embodiment of the cigarette paper, the further perforated area is located farther from the short side A than the first perforated area and the second perforated area.

  In one embodiment of the cigarette wrapper, the air permeability in the further perforated area is lower than the air permeability in the first perforated area and the second perforated area.

  In one embodiment of the cigarette wrapper, the air permeability in the second perforated area and / or further perforated areas is constant across each perforated area.

  In one embodiment of the cigarette paper, the air permeability in the second perforated area and / or in the further perforated area is 50 CU to 2000 CU, preferably 100 CU to 1000 CU.

  In one embodiment of the cigarette paper, the width of the second perforated area and / or the further perforated area is 2 mm to 25 mm, preferably 4 mm to 12 mm, more preferably 5 mm to 9 mm.

  In one embodiment of the cigarette paper, the air permeability outside the perforated area is less than 15 CU, preferably less than 10 CU.

  In one embodiment, the diffusivity of the tobacco web (other than and within the perforated zone), or the average diffusivity of the tobacco web, is less than 0.35 cm / s, preferably less than 0.25 cm / s, More preferably, it is less than 0.20 cm / s.

  In one embodiment, the tobacco wrapper includes one or more mineral fillers selected from the group consisting of carbonates and oxides, preferably selected from the group consisting of calcium carbonate, aluminum hydroxide, and magnesium oxide. Particularly preferably, the weight fraction of the one or more mineral fillers is from 10% to 40%.

  In one embodiment, the cigarette paper comprises citrate, malate, tartrate, acetate, nitrate, oxalate, fumarate, gluconate, glycolate, lactate, oxalate, salicylate , Α-hydroxycaprylate, and phosphate, preferably containing one or more combustion salts selected from the group consisting of sodium citrate and tripotassium citrate, Preferably, the content of the one or more combustion salts is up to 5% by weight.

In one embodiment, the tobacco web has a basis weight of 10 g / m ² to 60 g / m ² , preferably 20 g / m ² to 35 g / m ² .

  A further object of the present invention is a filtered cigarette comprising a cigarette paper according to the invention and further comprising a filter and chip paper, wherein the distance between the chip paper and the first perforated area is 10 mm. Achieved with a filtered cigarette that is less than, preferably less than 5 mm.

  The object of the present invention further comprises a method for producing a cigarette paper according to the present invention comprising a perforating step for creating at least one perforated area by electrostatic perforation, laser perforation and / or mechanical perforation. Achieved by the method.

  In one embodiment of this method, the perforating step is performed in a tobacco maker or in a device disconnected from the tobacco maker.

  The object of the present invention is further the use of a paper (base paper) for producing a cigarette paper according to the invention, preferably by the process according to the invention, wherein the paper is 0.3 to 5 m wide or 9 mm. Achieved through the use of paper, given in the form of a paper web having a width of from 35 mm to 35 mm.

  In one embodiment of such use, the air permeability of the base paper is less than 15 CU, preferably less than 10 CU.

  In one embodiment of the use, the base paper has a diffusivity of less than 0.35 cm / s, preferably less than 0.25 cm / s, most preferably less than 0.20 cm / s.

  In one embodiment of such use, the base paper comprises a mineral filler selected from the group consisting of carbonates and oxides, preferably selected from the group consisting of calcium carbonate, aluminum hydroxide, and magnesium oxide, Particularly preferably, the weight fraction of one or more mineral fillers is 10% to 40%.

  In one embodiment of the use, the base paper is citrate, malate, tartrate, acetate, nitrate, oxalate, fumarate, gluconate, glycolate, lactate, oxalate, Comprising one or more combustion salts selected from the group consisting of salicylate, α-hydroxycaprylate, and phosphate, preferably selected from the group consisting of sodium citrate and tripotassium citrate Particularly preferably, the content of the one or more combustion salts is up to 5% by weight.

In one embodiment of the use, the base paper has a basis weight of 10 g / m ² to 60 g / m ² , preferably 20 g / m ² to 35 g / m ² .

  The object of the present invention is further achieved by the use of the cigarette paper according to the present invention for producing the cigarette according to the present invention.

  The present invention is based on the fact that the following has been unexpectedly found. That is, it is not necessary to create a continuous air permeability distribution, but instead to achieve a comparable effect on the cigarette paper, the air permeability located close to the tobacco filter. That is, it is sufficient to perforate a constant separation area.

  If one separate perforation area close to the filter is not sufficient because the cigarette smoke value is still too high, then of course, further separation areas with different air permeability can be created by perforation. And these separation zones are correspondingly arranged closer to the end of the cigarette to be lit. In many cases, two such separate perforated areas are sufficient.

  When two or more separate perforated areas are placed in series (as viewed in the longitudinal direction of a cigarette made from this paper), the mouthpiece (ie, the end opposite the end to be ignited) It is also preferred that the air permeability tends to increase in the direction toward the. For example, it is preferred that the average air permeability in one-half or one-third of the cigarette paper closer to the mouthpiece is higher than in the rest of the cigarette paper.

  The rationale for this effect is not completely known, but the following explanation may provide evidence of how this effect is achieved. During the smoking process, negative pressure is created against the surrounding air at the cigarette mouth, causing air flow through the cigarette and carrying the smoke through the filter to the smoker. This negative pressure decreases along with the cigarette, so that there is almost no differential pressure between the point just before the red cone and the ambient air.

  And a separate perforated area located in close proximity to the tobacco filter has a high differential pressure between the ambient air and the inside of the tobacco rod during the smoking process (i.e., a relatively large amount of air is present in the tobacco). Located in the area of the tobacco rod (which can flow into the rod). In the area close to the red-hot cone and far from the inlet, this differential pressure is much smaller. Thus, these areas only contribute much smaller to the volume of air flowing into the cigarette, and these areas are not perforated (ie have low air permeability). However, there is almost no effect on the cigarette smoke during inhalation.

  Since the perforated areas are actually separated and clearly separated from the unperforated areas, these areas can be clearly detected with an optical sensor. And it is not difficult to synchronize the paper feeding and cutting processes with each other in the cigarette making machine so that the separation area on each cigarette is located at a desired location close to the filter.

  In addition, the air permeability in each perforated area is constant. Thus, the punching device only needs to be switched on and off at a frequency corresponding to the speed of the paper web. This is much easier than following a continuous air permeability distribution. In addition, it is not difficult to perforate the separation areas with different air permeability (but constant within the area). This is because the punching output of the device can be easily adjusted each time the punching device is switched on and off.

  In the following, some examples will demonstrate the effect of the desired invention.

1 is a schematic diagram of a cigarette with an exemplary embodiment of a cigarette paper according to the present invention. FIG. FIG. 3 shows a specific perforation pattern in tobacco wrapping to achieve the desired effect.

  FIG. 1 is a schematic view of a cigarette with an exemplary embodiment of a cigarette paper 1 according to the present invention. The cigarette wrap 1 comprises a first perforated area (perforated area) 2, a second perforated area 3 and a further perforated area 4. In this figure, the cigarette paper 1 is partially unfolded from a cigarette column 7 of cigarettes. Not only the filter 6 and the chip paper 5 that partially wraps the cigarette paper 1, but also the short side A is depicted.

  FIG. 2 shows a specific perforation pattern in tobacco wrapping to achieve the desired effect. This pattern is the result of a typical manufacturing process in mechanical cigarettes. Each of the perforated areas of the wrapper indicated by the reference numerals in FIG. 2 corresponds to each of the perforated areas in FIG. When producing a cigarette, a continuous tobacco rod is formed first, and then cut along line B into pieces that are twice the length of the tobacco rod in the cigarette. In the next stage of the cigarette manufacturing process, a double length piece of this tobacco rod is cut along line C into two pieces, with a double length between these pieces. It is separated in the axial direction so that the tobacco filter can be placed. The entire double length tobacco filter and the proximal area of each tobacco rod adjacent to the filter are glued together and wrapped with double width chip paper. After this, two successive cigarettes connected by a double length filter are cut into two cigarettes with a final cut through the center of the filter. The pattern to be created by perforating the cigarette can also be applied to other cigarette manufacturing methods.

[Example 1]
The starting point for each example is a cigarette paper with the following specifications:
Basis weight 28g / m ²
Filler fraction 21% of paper mass
Filler Chalk combustion salt fraction 1%
Salts for combustion Potassium citrate air permeability 6CU
Diffusivity 0.2 cm / s (for CO ₂₎

The diffusion rate is obtained by dividing the paper diffusion coefficient [cm ² / s] by the paper thickness [cm]. It is a transfer coefficient and represents the flow of gas through the paper at a given concentration difference, regardless of the paper thickness. This diffusivity can be measured by, for example, a CO ₂ diffusivity meter using sodium.

  Of course, equally good results can be achieved with different cigarette wrappers with different basis weights, different fillers and filler fractions, different combustion salts, and different combustion salt fractions, for example. To ensure self-extinguishing of cigarettes produced from the web, the air permeability of the web before perforation is correspondingly low, ie typically less than about 15 CU, or the diffusion coefficient of the web is As long as it is less than about 0.35 cm / s.

  This cigarette paper was then electrostatically perforated over its entire surface. As a result, air permeability of 50 CU, 100 CU, 150 CU, and 200 CU was achieved.

  Additional paper samples were prepared from the same cigarette paper. In those samples, a separate area (separation area) was perforated instead of the entire surface. These areas were designed as strips. As a result, the perforated area had a limited width but completely surrounded the cigarette in the circumferential direction. Each paper was provided with one or two strips, but nevertheless it is not impossible to provide more strips. The specifications for these papers are listed in Table 1.

* This distance is the distance from the leading edge of the chip paper to the beginning of the separated perforated area.
** Comparable air permeability is the air permeability of a cigarette paper that has been perforated over the entire surface, which results in the same cigarette smoke value as the cigarette paper perforated in the separation zone in the test cigarette. It is permeability.

From all the paper cigarettes with the following specifications were produced:
Cigarette length 84mm
Filter length 20mm
Chip paper length 24mm
Tobacco rod length 64mm
Visible tobacco rod length 60mm
Diameter 7.8mm
Cigarette weight 650mg
Cigarette blend American blend filter breathability 15%

  These specifications are understood to be exemplary only and, of course, the present invention can be applied with similar results to any other cigarette design.

  The flammability tendency of all cigarette samples was first tested according to ASTM E2187-04b. Forty cigarettes were tested for each cigarette according to ASTM E2187-04b, and more than 90% of the cigarettes tested in all samples were self-extinguishing. At that time, no statistically significant difference was found between the samples.

These cigarettes were further smoked in the manner shown in DIN ISO 4387. In this method, every minute, a volume of 35 cm ³ is sucked out in 2 seconds at the mouth of the smoked cigarette. This 35 cm ³ suction is called inhalation. This procedure is repeated until the cigarette is smoked shorter than the minimum length defined by the standard. The smoke is sucked out through the glass fiber filter, which is later chemically analyzed. From this, dry condensate without nicotine ("tar") and nicotine are measured, which are usually given in units of mg per cigarette.

  Machine smoking was done with a Borgwaldt RM20 smoking machine. However, the smoker was modified so that any inhalation of cigarettes would pass through different glass fiber filters. As a result, the cigarette smoke value in each inhalation could be measured after analysis. In this way, 20 cigarettes were mechanically smoked from each paper sample.

  Since the cigarette is ignited at the first inhalation, the first inhalation is an exception for that cigarette smoke value and will be excluded from consideration. During standardized mechanical smoking, the final inhalation may not be complete. This is because the cigarette falls below a predetermined minimum length during the inhalation. Such inhalation (“fractional inhalation”) is recorded as part of an entire inhalation. Thus, for the sake of simplicity, the last inhalation is also excluded from consideration.

  In general, the cigarette smoke value increases monotonically with each inhalation. To describe the non-uniformity of cigarette smoke from inhalation to nicotine-free condensate ("tar") between the penultimate and penultimate inhalations of cigarettes The ratio of is calculated. This ratio is listed in Table 2. The higher this ratio, the greater the cigarette smoke value will increase with each inhalation, and the inhalation profile will become more uneven.

*** The comparison value is the tar between the second and last inhalation for cigarettes where the cigarette is perforated over the entire surface and the air permeability is given in Table 1. Is the ratio.

  All samples show an improvement in inhalation profile uniformity, typically a reduction of about 5% to 20% in the observed tar ratio is achieved.

[Example 2]
Samples A and B
First of all, it can be appreciated that air permeation can be reduced by concentrating the perforations in the separation area close to the filter. This is because, at present, the perforated area is located at a location where the difference between the ambient air pressure and the pressure in the tobacco rod during the smoking process is greater than the location located closer to the red-hot cone. Because. The paper perforated over the entire surface has an air permeability of 50 CU over a length of 60 mm, whereas sample A is perforated over one tenth of this length, ie 6 mm. It has only been done. It would be expected that in order to obtain the same air inflow into the cigarette, the air permeability needs to be 10 times larger, ie 500 CU. Surprisingly, it can be appreciated that only 160 CU is sufficient to achieve the same cigarette smoke value. As regards the uniformity of the inhalation profile, an improvement of about 13% from a tar ratio of 1.42 to 1.23 has been achieved.
With higher air permeability (sample B), this effect is even more pronounced. Again, an air permeability of 650 CU is sufficient rather than the nominal value of 200 × 60/6 = 2000 CU.

[Example 3]
Samples C to F
If the cigarette paper is perforated in two separate areas instead of one, the cigarette smoke value comparable to that of a cigarette with a fully perforated cigarette is obtained with even lower air permeability. Can be achieved. This is evident because the perforated surface area is now twice as large compared to a single perforated area. In theory, the air permeability of sample C may be selected to be half as large, ie 80 CU. However, the second perforated area is located farther away from the mouthpiece and thus at a site where the differential pressure is no longer the same. In addition, the area is burned down during the smoking process. Therefore, the contribution from that area is smaller, so to obtain a value comparable to that of a cigarette with 50 CU paper perforated over the entire area, It was necessary to drill at 120 CU. These considerations apply correspondingly to the higher air permeable samples D, E, and F.

  With respect to the tar ratio figures, a clear improvement of about 10% to 20% can be observed compared to the overall perforation, but this improvement is not as obvious as there is only one perforation area.

  Because lower air permeability is acceptable, drilling can be performed at lower power and higher speed. This advantage must therefore be weighed against a reduction in the improvement in inhalation profile uniformity.

[Example 4]
Samples A, G, and H
Samples A, G, and H differ from each other exclusively in the distance of the perforated area from the leading edge of the chip paper. The distance is 1 mm for sample A, 3 mm for sample G, and finally 5 mm for sample H. An improvement in the uniformity of the inhalation profile was achieved compared to paper that was perforated over the entire surface, but this improvement was only when the first perforated area was too far away from the leading edge of the chip paper. Was found to decline rapidly. More specifically, the improvement is reduced from 13% to about 8% at a distance of 3 mm, and to only 5% at a distance of 5 mm. Therefore, it is better to keep this distance at least less than 10 mm, preferably less than 5 mm.

[Example 5]
Samples A, J, K, and N, and B
Samples A, J, K, and N initially differ from each other in the width of the perforated area. The air permeability was adjusted accordingly to obtain cigarette smoke values similar to each other. Sample A with 6 mm width has 160 CU, Sample J with 7 mm width has about 140 CU, Sample K with 9 mm width has just 110 CU, and finally Sample N with 20 mm width has just 80 CU. Have.

  A 7% to 14% improvement in inhalation profile uniformity could be achieved. This indicates that the effect of width is somewhat small. If improvement is to be achieved, it can be assumed that the perforated area may have a width of more than 20 mm. Based on this data, the maximum width of the perforated area will be selected to be about 25 mm.

  The minimum width is limited by the air permeability that can be obtained by the perforator, but this air permeability is the maximum air permeability that can be obtained without too weakening the tensile strength of the paper in such a narrow area. Considering Sample B with 650 CU over a 6 mm width as a starting point, a 2 mm wide area must be nominally drilled to 1950 CU to achieve the same result. This is already a very high air permeability that is difficult to achieve in such narrow areas. This is why the width of the perforated area should be 2 mm to 25 mm, preferably 4 mm to 12 mm, more preferably 5 mm to 9 mm.

[Example 6]
Samples A, E, L, and M
Finally, samples L and M show that the air permeability of the two perforated areas need not be the same. Based on the previous results, it may be advantageous to drill more frequently in areas located closer to the mouthpiece. For samples L and M, the air permeability of the first zone is about 150% of the air permeability of the second zone.

  At about 13% (sample L), the improvement achieved in the tar ratio figures is comparable to paper with perforated areas based on sample A.

  However, as in Samples E and M, the following can be observed at higher air permeability. That is, using the same drilling level in both areas (sample E, 370 CU) with an improvement of −11.6% in the tar ratio is drilled unevenly based on sample M (410 CU / 270 CU). The results are worse than those with the same -15% improvement.

  In any case, these results assume that it is not advantageous to drill the second zone more often than the first zone. As long as it is technically relevant and compatible with the cigarette smoke value, it is required to perforate the second zone to a lesser degree.

  Similarly, for multiple perforated areas, it is true that when looking at the red cone from the mouthpiece, each area should be perforated to a lesser degree than the previous area.

  There is no reason to give each area a different width. Similarly, the position of each perforated area can be varied.

  In general, many further variations of the invention are possible and the illustrations herein are merely illustrative of the principles of the invention and are not intended to be limiting.

Claims (18)

Tobacco wrapping paper, which provides self-extinguishing to a cigarette produced from the wrapping paper, the base paper has an average CO ₂ diffusivity of less than 0.35 cm / s, and comprises at least one separation zone (2) in cigarette paper (1) was, the zone, while being drilled, than air permeability other than the perforated zone and have a large air permeability, the cigarette paper has a short side a, This short side A is intended to face the finished cigarette filter (6) and is within the range of one half or one third of the length of the cigarette closer to this short side A. The average air permeability at is greater than the average air permeability of the rest of the tobacco web, and the cigarette paper including one or more of the separation zones (2; 2, 3, 4) is 0.35 cm / to have an average CO ₂ diffusivity of less than s Cigarette paper to the butterflies.   2. The cigarette wrapper according to claim 1, wherein the air permeability in the perforated area (2) is constant throughout the perforated area.   3. The cigarette paper according to claim 1 or 2, wherein the air permeability in the perforated area (2) is 50 CU to 2000 CU.   4. The cigarette paper according to claim 1, wherein the width of the perforated area (2) is 2 mm to 25 mm. Perforated zone (2) is in the first range of 3 minutes of a short side A to closer cigarette paper length of cigarette paper according to any one of claims 1 to 4. Comprising at least a second separation zone (3), this second separation zone (3) being perforated and separated from the first perforated zone (2) by an unperforated zone The tobacco wrapping paper according to any one of claims 1 to 5 . The cigarette wrapper according to claim 6 , wherein the second perforated area (3) is located farther from the short side A than the first perforated area. The cigarette wrapping according to claim 6 or 7 , wherein the air permeability in the second perforated area (3) is lower than the air permeability in the first perforated area (2). Comprising at least one further separation zone (4), this further separation zone (4) being perforated and defined by at least one non-perforated zone by means of the first perforated zone (2) and the first 9. A cigarette wrapper according to any one of claims 6 to 8 , which is separated from two perforated areas (3). Further perforated zone (4), than the first perforated zone (2) and a second perforated section (3) is disposed remote from the short side A, according to claim 9, wherein Cigarette wrapping paper. The air permeability in the further perforated area (4) is lower than the air permeability in the first perforated area (2) and the second perforated area (3). Item 11. The tobacco wrapping paper according to Item 9 or 10 . Air permeability than the perforated zone is less than 15Cu, cigarette paper according to any one of claims 1 to 11. The cigarette paper has an average CO ₂ diffusivity of less than 0.25 cm / s, cigarette paper according to any one of claims 1 to 12. A cigarette comprising the cigarette paper (1) according to any one of claims 1 to 13 and further comprising a filter (6) and chip paper (5), wherein the chip paper (5) and the first paper Cigarette with a distance between the perforated area (2) of less than 10 mm. A method for producing a cigarette paper according to any one of claims 1 to 13, electrostatic perforation, laser drilling, and / or produce at least one perforated zone by mechanical drilling drilling stage With a method. 16. A method according to claim 15 , wherein the perforating step is performed in a tobacco maker or in a device disconnected from the tobacco maker. The cigarette paper according to any one of claims 1 to 13, to the use of paper for the manufacture by a method according to any one of 請 Motomeko 15 and 16, the paper is 0. Use of paper, given in the form of a paper web having a width of 3 to 5 m or a width of 9 to 35 mm. Use of the cigarette paper according to any one of claims 1 to 13 for producing a cigarette according to claim 14 .

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