TWI435698B - Undulated banded cigarette paper - Google Patents

Description

Cigarette paper with wavy tape

The present invention relates to a cigarette paper for smoking articles, and more particularly to a cigarette paper having a wavy belt.

There has always been an attempt to design a smoking article that would be accidentally left on a substrate, and the tendency to do so is referred to herein as a "low ignition tendency". Ideally, smoke products with a low tendency to ignite will continue to burn when placed on free, such as by placing a cigarette holder in an ashtray or holding it in the hand without suction ("free burning"). The tendency of cigarettes to extinguish during free combustion is referred to herein as "self-extinguishing." Many conventional cigarette designs that achieve low ignition tendency characteristics exhibit a high self-extinguishing rate in a free-burning state.

A cigarette paper for smoking articles, comprising: a bottom sheet having a rated air permeability; and a belt region containing a sufficient additive material, wherein the cigarette paper has a gas permeability lower than a rated air permeability of the bottom sheet in the belt region. As seen by the advancing soot, the leading edge of the belt region is dentured.

According to the present description, a smoking article 1 comprises a tobacco rod 2. The tobacco rod 2 may comprise a cut tobacco filler 3 and is surrounded by the cigarette paper 10. One end of the smoking article can include a suitable filter 4 that is surrounded by a suitable filter paper. The smoking article 1 typically has a generally circular cross section in length of the smoking article. However, other cross-sectional shapes including, for example, oval shapes are within the scope of the present description. Tobacco rod 2 has along the smoke The vertical axis of the product, the nominal length measured from the filter paper to the free end of the tobacco rod. For example, the nominal length can range from about 60 mm to about 100 mm.

Cigarette paper 10 comprises a bottom sheet that is typically breathable. The air permeability of cigarette paper is usually expressed in units of the Coresta (Cooperation Center for Scientific Research Relative to Tobacco Research Center for Cigarette Science). Coresta units per unit, a pressure drop (i.e., water column cm) per the unit area (i.e., cm ^2), the volumetric flow rate (i.e., cm ³ / sec) was measured air permeability of the paper. The bottom sheet of the conventional cigarette paper also has a known basis weight, which is measured in grams per square meter referred to as "gsm" for short. The air permeability and basic weight of the bottom sheet of typical smoking paper commonly used in the industry are set in the following table:

For purposes of illustration, the bottom sheet of the preferred cigarette paper has an air permeability of at least about 20 Coresta units. The preferred consumer cigarette paper has an air permeability of greater than about 30 Coresta, such as a conventional base sheet having a nominal air permeability of about 33 and about 46 Coresta, and having a basis weight of about 25 gsm. For some applications, the backsheet may have an air permeability of greater than about 60 Coresta or greater than about 80 Coresta, and even higher breathability values.

For conventional reasons, it is to be understood that when the dimensions of the various embodiments are described herein, the "width" of the belt region extends in the longitudinal direction of the tobacco rod, and the circumferential extent of the belt region The dimension of the direction is indicated as the "traverse direction" of "horizontal" or "crossing the direction of the sheet".

For the purposes of this description, the zone of added material described herein is applied to cigarette paper for improved ignition tendency characteristics and improved self-extinguishing characteristics. The ignition tendency is a standard test as described in ASTM E 2187-04 "Standard Test Method for Measuring the Ignition Power of Tobacco Products", the entire disclosure of which is incorporated herein by reference. Ignition propensity determination When placed on a platform, the smoking article generates enough heat to maintain the possibility of static burning of the tobacco rod. The low ignition tendency value is preferred because the equivalent value is related to the reduction in the likelihood that the smoking article in the smouldering will cause burning of the lower platform.

Here, self-extinguishing refers to a state in which the smoking article is smouldering in a free-burning state. To evaluate self-extinguishing, laboratory tests were performed at a temperature of 23 ° C ± 3 ° C and a relative humidity of 55% ± 5%, both of which should be monitored by a damp heat recorder. The hood removed the combustion products formed during the test. Before the test, the tobacco to be tested was adjusted for 24 hours under conditions of 55% ± 5% relative humidity and 23 ° C ± 3 ° C. Shortly before the test, the smoking article was placed in a glass beaker to ensure free air in and out.

The self-extinguishing test occurs in the enclosure or in the test box. Use a single-port cigarette lighter or electric lighter to ignite the test article. During testing, a device or "angle holder" maintains the tested smoking article by maintaining one end at an angle of 0 (horizontal), 45°, and/or 90 (vertical). Twenty cigarettes were tested at 0°, 45° and 90° each position. If more than one device is used, the device is preferably positioned such that the smoking products deviate from each other to avoid interference. If the smoking is in the smoked ash The leading edge is extinguished before it reaches the filter paper. The result is recorded as "self-extinguishing". On the other hand, if the smoking article continues to be smoldered until the leading edge of the smoked ash reaches the filter paper, the result is recorded as "Not extinguished." Thus, for example, a 95% self-extinguishing value indicates that 95% of the tested smoking articles exhibit self-extinguishing in a free-burning state; and a 20% self-extinguishing value indicates that only 20% of the tested smoking articles exhibit self-extinguishing in a free-burning state.

The self-extinguishing value can be expressed as "self-extinguishing value at 0 degrees", "self-extinguishing value at 45 degrees" or "self-extinguishing value at 90 degrees", each indicating a self-extinguishing value of a specific test angle. In addition, the self-extinguishing value can be expressed as "self-extinguishing the average value", which represents the average of the three angular positions: that is, (i) the average value of "self-extinguishing value at 0 degrees", and (ii) "at 45 degrees" The average of the self-extinguishing values and (iii) the average of the self-extinguishing values at 90 degrees. "Self-extinguishing value" means a self-extinguishing value that is not distinguished at 0 degrees, a self-extinguishing value at 45 degrees, and a self-extinguishing value at 90 degrees or self-extinguishing the average value, and may refer to any of them.

As used herein, the phrase "self-extinguish in a free-burning state" or "self-extinguishing in a free-burning state" means the extinction of a non-smoky smouldering cigarette when the cigarette is subjected to or exposed to a free-burning state.

The term "wavy" as used herein to describe the leading edge of a zone means that the leading edge has a wavy shape. The wavy shape can be curved or composed of straight segments containing rectangles or squares, and all the words cover "caries". As used herein, the term "cartridge" refers to a pattern of geometrical spacings that are multiplexed, regularly spaced, and removed from other physically continuous regions. Toothed pattern or The strap may also be referred to as serrated or similar to a pulse wave. As used herein, "mouth" refers to the opening or valley of a gingival margin, and "caries" refers to the elevation between the jaws, the ridges or the ridges.

As used herein, the term "leading edge" means the edge of the zone adjacent to the advancing soot during the smoldering of the tobacco containing the zone, and the term "trailing edge" means the zone containing the zone of cigarette paper. During smoking, the smoke is farthest from the edge of the belt where the ashes advance. In the embodiment of the dentition, as shown by the width "W" in Fig. 6, the full width "W" of the belt region is measured from the foremost portion of the leading edge to the rearmost portion of the trailing edge.

The cigarette paper for smoking includes a bottom sheet 10 (refer to Fig. 2) having a rated air permeability and a plurality of belt regions 12 having sufficient material to be added, and the cigarette paper having a lower sheet in the belt region Air permeability with low air permeability. The leading edge 14 of each belt region 12 is toothed. Alternatively, the trailing edge 16 of the belt region may also be serrated.

While those skilled in the art can appreciate the configuration of various caries regions, several such configurations are illustrated in the drawings. For example (see FIG. 2), the belt region 12 can have a leading edge 14 with the jaws 20 disposed between the molars 18. In the present embodiment, the molars 18 have a dimension substantially the same as the lateral dimension of the mouthpiece 20 in the lateral direction of the backsheet 10. As illustrated, the molars 18 and the jaws 20 can generally be rectangular. However, if desired, the molars 18 and the mouthpiece 20 can have other geometric shapes without limitation, including quadrilaterals, trapezoids, triangles, pentagons, and other regular or irregular geometric configurations. The distance between the top of the molars 18 and the bottom of the adjacent jaws 20 may range from about 2 mm to about 5 mm, preferably. Can be about 3mm.

A similar tooth configuration can also be provided at the trailing edge of the belt region 12. To this end, a plurality of molars 22 can be laterally spaced across the bottom sheet 10 and separated from each other by a corresponding plurality of jaws 24. As illustrated, the leading edge molars 18 are laterally aligned with the trailing edge of the jaws 24, and the leading edge of the jaws 20 are laterally aligned with the trailing edge of the molars 22. The cornice 24 has a transverse sheet size that is substantially the same as the cross-web size of the molars 18 at the leading edge 14 of the belt. Similarly, the serrations 33 of the trailing edge 16 can have a cross-web dimension that is substantially the same as the cross-web dimension of the rake 20 of the leading edge 14. The distance between the top of the molars 22 and the bottom of the adjacent jaws 24 may range from about 2 mm to about 5 mm, preferably about 3 mm. For example, the molars 18 and the tongue 20 of the leading edge 14, the trailing edge of the molars 22 and the jaws 24 can be substantially rectangular, generally quadrangular, generally trapezoidal, generally triangular, generally pentagon, and other regular or irregular geometric configurations. .

Preferably, the bottom 21 of the rim 20 of the leading edge 14 is spaced from the bottom 25 of the rim 24 of the trailing edge in the range of from about 2 mm to about 5 mm, preferably by a distance x in the range of from about 3 mm to about 4 mm. With this configuration, the substantially continuous band of width x extends transversely across the bottom sheet 10. The bottom 21 of the leading edge of the mouth 20 corresponds to the leading edge of the substantially continuous band "x", while the bottom of the trailing edge of the mouth 24 corresponds to the trailing edge of the substantially continuous band "x". The continuous belt portion "x" provides a bottom sheet region in which the cigarette paper of the smoking article has less air in and out than in the region lacking the added material. Therefore, the distance x can be adjusted to achieve the desired balance between ignition tendency performance and self-extinguishing performance.

The adjacent strip regions 12 and 12' of the bottom sheet 10 are longitudinally separated from each other by a rated space. distance. The nominal spacing "S" (measured from the rearmost portion of the trailing edge 16 to the foremost portion closest to the leading edge 14) may range from about 10 mm to about 30 mm. In particular, the length of the belt which may depend on the length of the rod of the smoking article may be about 27 mm, meaning that the nominal spacing is about 27 mm minus the width of the denture. The spacing minimizes the total coated area (i.e., the area of the additive) in the smoking article, thereby reducing the carbon monoxide (CO) level in the main plume. Although the depth of the mouth 20 on the leading edge of the belt region 12 and the depth of the mouth 24 on the trailing edge of the belt region 12 are the same as shown in Fig. 2, if desired, the depth can be made different, and this is still in the present Reveal the content within the scope.

The lateral dimensions of the molars 18, 22 and the jaws 20, 24 can be substantially the same as those shown in Figure 2. Preferably, however, the integer pair of molars 18 and the mouthpiece 20 have a traversing sheet size corresponding to the nominal circumference of a smoking article. For example, the two sets of molars 18 and the fistula 20 may have a cross-lamella size of about 6.2 mm, and the two pairs of each set have a cross-lamella size of about 24.8 mm, which corresponds to the nominal circumference of the smoking article. With the aid of the size of the jaws and the jaws, when the bottom sheet 10 is split longitudinally to form a bobbin of cigarette paper for smoking, for example, on the lines 30, 32, the pattern of the teeth of the belt region 12 is substantially perfectly covered. The tobacco rod is formed by the longitudinal slit.

In other words, when creating a printed pattern for a toothed (or serrated) roll, even if the roll can be cut slightly larger than the nominal circumference of the cigarette (to provide the edge portion for the seam along the tobacco rod), the pattern It should still be repeated across the paper roll according to the transverse dimension of the pattern with the nominal circumference of the cigarette. This practice ensures that the pattern is created as desired on the cigarette, regardless of where the slit starts or the size of the slit. For example, if a cigarette is intended to have a pattern of eight (8) molars (or teeth), And the cigarettes are intended to have a nominal circumference of 24.8 mm, and the toothed (or serrated) rolls are cut every 27 mm, but the pattern of eight (8) molars (or teeth) is repeated every 24.8 mm.

Turning to Figure 3, the ratio of the dent 44 and the nip 46 of the leading edge 40 is different than that shown in Figure 2. In Fig. 3, the molars 44 can have a cross-web size that is about half of the size of the associated web 46 across the web. However, as discussed above, the integer pair of molars 44 and the jaws 46 correspond to the nominal circumference of the smoking article. Preferably, the height of the molars 44 or the depth of the jaws 46 is within the range of values discussed in connection with Figure 2.

At the trailing edge of the embodiment of Figure 3, the traverse roll paper size of the trailing edge nip 50 and the trailing edge nip 48 is different from the leading edge nip 44 and the leading edge nip 46 across the roll size. However, again, the integer set of molars 50 and the mouth 48 have a cross-web size corresponding to the nominal circumference of the smoking article. As shown, the cross-web size of the cornice 48 is substantially smaller than the cross-web size of the upper teeth 44 on the opposite portion of the leading edge 40. Moreover, the depth of the jaws 48 or the height of the molars 50 is within the dimensions discussed above in connection with Figure 2. Moreover, the spacing between the bottom of the leading edge upper opening 46 and the bottom of the trailing edge upper opening 48 is also within the dimensions discussed above in connection with Figure 2. The spacing between adjacent strip regions 12 in Figure 3 is also within the dimensions discussed above in connection with Figure 2.

Turning now to Figure 4, the leading edge 14 of the belt region 12 can have substantially the same features as discussed above in connection with Figure 2. However, the trailing edge 64 can have a dent 60 that has a traversing sheet size that is substantially larger than the rim of the leading edge of the rim across the sheet size, while the trailing edge nip 62 traverses the sheet size It is less than the traversing sheet size of the corresponding opposing molars 18 of the leading edge 14. The spacing between the leading edge and trailing edge of the dentate shape in Fig. 4 and the longitudinal spacing between adjacent strip regions 12 of Fig. 4 are substantially within the same range as discussed above in connection with Fig. 2.

Figure 5 shows yet another embodiment of the dentate band region 12 in accordance with the present disclosure. In this embodiment, the leading edge 14 can have features as discussed in conjunction with FIG. 2 or FIG. However, in the present embodiment, the trailing edge 70 of the dent band region 12 can be straight. The spacing between the bottom of the cornice 20 and the trailing edge 70 can be selected to be the same as the spacing between the serrated regions 20, 24 of Figure 2. Moreover, preferably, the adjacent belt regions 12 (Fig. 5) are spaced apart as illustrated in Fig. 2.

The leading edge molars can have a lateral dimension in the range of from about 3 mm to about 7 mm. For example, the leading edge molars can have a lateral dimension of about 3.1 mm, about 4.2 mm, or about 6.2 mm. The rake of the leading edge can have a lateral dimension in the range of from about 3 mm to about 7 mm. For example, the rake of the leading edge can have a lateral dimension of about 3.1 mm, about 4.2 mm, about 5.2 mm, or about 6.2 mm. The trailing edge molars can have a lateral dimension in the range of from about 6 mm to about 10 mm. For example, the trailing edge molars can have a lateral dimension of about 5.775 mm, about 6.2 mm, or about 6.775 mm. The trailing edge of the mouth can have a lateral dimension in the range of from about 1 mm to about 7 mm. For example, the trailing edge of the cornice can have a transverse dimension of about 1 mm, about 2.1 mm, or about 6.2 mm.

Still referring to FIG. 5, it is otherwise illustrated that the zone of the smoking article may include a wavy leading edge to define an interdigitated leading edge region 114 (shown between the dashed lines z1 and z2), the leading edge region 114 including an increase in aeration rate Zone 117 and reduction zone 115 Interlaced with each other. The leading edge region 114 can be dentured, the aeration rate relative reduction region 115 is the molar tooth of the gingival front region 114, and the aeration rate is relatively increased. The ventralization of the leading edge region 114 is preferably 117. There is no or less added area 117 of material.

It can be seen that the leading edge 14 undulates along the leading edge region 114 in this manner and can be seen as other waveforms such as sinusoidal or triangular undulating in place of the stepped waveform shown in FIG. The frequency of the undulation can be adjusted to improve SE performance.

Without wishing to be bound by theory, it is believed that the leading edge region 114 will improve self-extinguishing performance, but has little or no impact on the ignition tendency performance of a band of similar bandwidth. It is believed that the aeration rate increase zone 117 increases the flow of gas to the soot as it approaches the zone 12.

The trailing edge region of the belt region may also undulate to define an interdigitated trailing edge region 116 that includes mutually intersecting regions of the aeration rate increasing region 117 and the decreasing region 115. Advantageously, the relatively increased aeration rate zone permits a relatively increased amount of air to pass to the bottom sheet of the cigarette paper of the smoking article as compared to the relatively reduced aeration rate zone.

Although the above embodiment illustrates that the gingival rim has a conventional notch shape, the carious belt 12 of Fig. 6 has a different shape for the gingival rim 80. More particularly, the gingival rim 80 has substantially triangular molars 18. The triangular molars 18 are substantially separated by a triangular split 20 and define the triangular split 20. If desired, the trailing edge 82 can be straight. Preferably, however, the trailing edge 82 of the strap 12 can also have a triangular molar configuration as illustrated by the leading edge 80. Importantly, the bottom of the leading edge nipple 20 is along the bottom sheet 10, longitudinal and trailing edge The cornices 20' are separated by a distance w. Another important feature is that the longitudinal spacing S between the top of the crotch of the trailing edge 82 and the top of the crest of the subsequent leading edge 80' is greater than the width w of the continuous portion of each band 12.

It is believed that the triangular toothed belt 12 will function as a conventional belt in the region w. The molars that couple the longitudinal strip spacing S cooperate to reduce the carbon monoxide component of the smoke of the smoking article formed from the cigarette paper. Moreover, by corresponding to the circumference of the smoking article to be manufactured by the roll paper 10, the traversing sheet interval z between the tops of the integral molars is selected, the roll paper 10 can be cut at a cutting position, longitudinally cut, and the roll paper 10 is substantially precise Cover the longitudinal seam of the roll paper. The interval z can also be adjusted to achieve the desired balance between the ignition tendency performance and the self-extinguishing performance of the smoking article.

Similar to the carious belt of Figure 6, the carious belt 12 of Figure 7 has a gingival rim 80 having substantially triangular molars 18 separated by a substantially triangular mortise 20, And defining the triangular cornice 20. In Figure 7, the trailing edge 82 can be straight, but the trailing edge 82 can also have a same triangular dent configuration as the leading edge 80. As further shown in Fig. 7, the belt can be divided into two belt portions 112, 112' which are separated from each other by a "crack" 81. The crack 81 typically does not exceed the width of the individual strip portions 112, 112' as measured in a direction generally parallel to the axis of the article having the strip. The spacing feature provides "cracks" 81 (or discontinuities) in the strip structure with less or no added material.

Figures 8 and 9 each show a toothed belt 12 similar to that of Figure 7, but the belt is divided into three belt portions 112, 112', 112", which are borrowed from the belt portions 112, 112', 112" A pair of slits 81, 83 are separated from each other along the axis of the smoking article. Further, in Fig. 7, the cracks 81 between the individual and divided strip portions 112, 112' are different from the cracks 81, 83 between the individual strip portions 112, 112', 112" in Figs. 8 and 9. 8 and 9 The widths of the individual, separate strip portions 112, 112', 112" are different from each other, rather than the width of the full molar belt W.

In the embodiment shown in Fig. 10, the belt 12 has a different shape of the gingival rim 80. In particular, Fig. 10 shows the leading edge of the tooth decay (i.e., the fan shape cut into a circular shape). The segments 19 (i.e., circular segments or angled projections) may have different or uniform widths and/or lengths. The belt trailing edge 82 can be straight, serrated (according to any of Figures 1-6) or scalloped. It is intended that the scalloped belt of Fig. 10 can further include a "crack" in the belt structure as shown in Figs. 7-9. Moreover, although not shown, the belt structure may include a leading edge and/or a trailing edge of a molar (i.e., having an irregular wavy or serrated configuration), the belt being characterized by optionally having one or more "cracks."

As illustrated herein, smoking articles can include tobacco rods and cigarette paper. Preferably, the cigarette paper has a transverse dimension that accounts for the circumference of the tobacco rod and the overlapping slits. As a result, regardless of whether the cigarette paper is split or not, the tooth-tooth pattern always has a correct overlap when the cigarette is formed. In other words, it is determined that the lateral dimension of the molars and the mouth of the dentate band region is on the smoking article. Preferably, the leading edge of the belt region comprises at least two jaws and at least two molars. For example, the leading edge of the belt region may include two jaws and two molars, three jaws and three or four jaws and four molars. In this way, no matter how the smoking products are placed on the platform during the ASTM test, there is always a zone. Symmetry of the domain. Without wishing to be bound by any theory, when the smoke is placed on the platform during the smoldering, the burning will be regulated by the leading edge of the dentate shape; in particular, the molars of the leading edge reduce the advancement of smoldering, but During the free-burning state, the rim of the leading edge allows a limited amount of smoldering to continue. Therefore, it should be possible to achieve the desired characteristics of self-extinguishing and igniting.

As is currently understood, in accordance with the present description, the zone of added material allows the smoking article to be designed to have a combination of low ignition tendency values and low self-extinguishing values. The low venting zone of the added material provides a film forming composition region along the length of the tobacco rod that cooperates with the platform to extinguish the ignited smoking article when the ignited smoking article is placed on the platform, but only when the smoker is in a free burning state In the case of smoking articles, such film-forming composition regions do not cause the smoking articles to self-extinguish. Thus, in accordance with the present description, by applying a film-forming composition region to the backsheet, the smoking article can exhibit a reduced tendency to ignite while maintaining the desired free-burning properties or low self-extinguishing values. The added material can be applied to one or both sides of the bottom sheet.

In order to achieve the ignition tendency and self-extinguishing characteristics of the desired smoking article, the belt area is applied to the bottom sheet of the cigarette paper. One of the objects of the present specification is to provide a cigarette paper which exhibits an ignition tendency value of not more than 25 and a self-extinguishing value of not more than 50 when forming a tobacco rod. It is preferable that the ignition tendency value of the finished smoking product is not more than about 15; and the optimum smoking article has an ignition tendency value of not more than about 10. It is also expected to have a lower self-extinguishing value. In this aspect, the preferred self-extinguishing value is less than about 25; and the optimum self-extinguishing value is less than about 10.

The transverse dimension of the cigarette paper is selected based on the diameter of the finished smoking article (about 7 mm to about 10 mm) and allows the material to overlap the longitudinal slits of from about 1 mm to about 2 mm. For example, to allow for the overlap of slits of 1 mm, for cigarettes having a circumference of about 25.6 mm, the transverse dimension of the cigarette paper can be about 27 mm.

The belt region can be reduced in the air permeability of the paper in the belt region by coating one or more layers of the aqueous film-forming composition on the bottom sheet of the cigarette paper. Alternatively, a cellulosic material can also be used to form the belt region. In the case of using a film-forming composition, preferably, the film-forming composition may comprise water and a high concentration, for example from 20% to about 50% by weight of an occluding agent. The film forming composition may comprise one or more absorbents such as starch, alginate, cellulose or gum, and may also comprise calcium carbonate as a filler. In the case of starch-based film-forming compositions, a concentration of about 24% may be advantageous.

The film forming composition can be applied to the bottom sheet of the cigarette paper 10 using gravure printing, digital printing, coating or spraying using a stencil, or any other suitable technique. For example, a film-forming composition disclosed in U.S. Patent Publication No. 2007/0102017 A1 and a method for coating a film-forming composition can be used to coat a belt-to-bottom sheet of a cigarette paper, the entire text of which is hereby incorporated by reference. reference. If desired, the strip regions of the added material can be formed into a plurality of continuous layers that are aligned or aligned with one another, such as two or more continuous layers. Moreover, when layers are used to form the ribbon regions of the additive material, the materials of the layers may be the same or different. For example, one layer may be starch and the second layer may be starch and calcium carbonate.

In addition, the ability to extinguish the smoking article may depend on providing a minimum length amount of film forming composition, more depending on the specific weight per unit area of the film forming composition. If a combustion accelerator is applied to the paper, the amount of film forming composition used can be increased without losing the free combustion properties. Preferably, the zone of the added material will The air permeability of cigarette paper is reduced to a range of about 0 to 10 Coresta.

The multi-step printing apparatus described herein typically comprises a reel, a first gravure printing station, a second gravure printing station, a third gravure printing station, a collecting reel, a roller, an impression cylinder, a support roller, a pliers, a sump, a pump , heat exchangers, applicators, tanks, collectors, drain holes, scrapers, adjustment rolls, and idle rolls.

As an alternative to the gravure printing operation, the strip region or tape can be applied to the backsheet using the same cellulosic material that forms the backsheet. The belt region may comprise highly refined cellulose (eg, fibers, fibrils, microfibrils, or combinations thereof) slurries or other additive materials that are coated using various spray or coating techniques, including as commonly co-owned US Pat. No. 5,997. The application of a moving orifice applicator to the forming section of a paper machine is described in 691 and US Pat. No. 6,596, the disclosure of which is incorporated herein by reference. In the past, this technique has been used to form a zone in the circumferential direction by adjusting the relative movement between the roll paper and the moving hole strip of the apparatus described in the commonly-owned U.S. Patent Nos. 5,997,691 and 6,596,125, the disclosure of which is incorporated herein by reference. Can be easily formed. It should be noted that this configuration facilitates the operation of the moving orifice device at a slower belt speed that is more broadband and has a higher application rate.

The terms and terms used herein must not be interpreted mathematically or geometrically, but geometric terms are interpreted as close to or similar to the meaning of geometric terms and concepts. Terms such as "roughly" are intended to cover the precise meaning of the relevant nouns and concepts, and to provide a reasonable range consistent with form, function, and / or meaning.

The term "about" used in relation to quantity is intended to include tolerances in the described number A value within 10% of the amount.

Although various embodiments have been described, it will be understood that various modifications, changes and equivalents can be readily made by those skilled in the art. Such changes, changes and parity are considered to be within the scope and scope of the scope of the patent application.

1‧‧‧Smoking

2‧‧‧ tobacco rod

3‧‧‧cut filler

4‧‧‧ filter

10‧‧‧ bottom sheet (cigarette paper)

12,12’‧‧‧With zone

14‧‧‧ Leading edge

16‧‧‧ trailing edge

18‧‧‧ teeth

19‧‧‧ sector

20,20’‧‧‧ mouth

21‧‧‧ bottom of the mouth

22‧‧‧ teeth

24‧‧‧垛口

25‧‧‧ bottom

30,32‧‧" line

33‧‧‧ teeth

40‧‧‧ leading edge

44‧‧‧ leading edge caries

46‧‧‧ Front edge

48‧‧‧ trailing edge caries

50‧‧‧ trailing edge caries

60‧‧‧ teeth

62‧‧‧ trailing edge

70‧‧‧ trailing edge

80‧‧‧ teeth

81,83‧‧‧ crack

82‧‧‧ trailing edge

112, 112’, 112’‧‧‧ Belt Department

114‧‧‧ leading edge zone

115‧‧‧ Relatively reduced air permeability

116‧‧‧Finger trailing edge zone

117‧‧‧ areas with relatively high air permeability

BRIEF DESCRIPTION OF THE DRAWINGS The many objects and advantages of the present disclosure will be apparent to those skilled in the art in the <Desc/Clms Page number> 2 is a schematic view of a cigarette paper having a first embodiment of a toothed belt region; FIG. 3 is a schematic view of a cigarette paper having a second embodiment of a toothed belt region; and FIG. 4 is a toothed belt region. Fig. 5 is a schematic view showing a cigarette paper of a fourth embodiment having a toothed belt region; and Fig. 6 is a schematic view showing a cigarette paper of a fifth embodiment having a toothed belt region; BRIEF DESCRIPTION OF THE DRAWINGS Fig. 8 is a schematic view showing a cigarette paper of a sixth embodiment of a toothed belt region; Fig. 8 is a schematic view showing a cigarette paper of a seventh embodiment having a toothed belt region; and Fig. 9 is a view showing a toothed belt region according to an eighth embodiment. Schematic diagram of a cigarette paper; and Fig. 10 is a schematic view of a cigarette paper of the ninth embodiment having a toothed belt region.

10‧‧‧ bottom sheet (cigarette paper)

12,12’‧‧‧With zone

14‧‧‧ Leading edge

16‧‧‧ trailing edge

18,22‧‧‧ teeth

19‧‧‧ sector

20,20’, 24‧‧‧ mouth

21‧‧‧ bottom of the mouth

25‧‧‧ bottom

30,32‧‧" line

Claims (9)

A cigarette paper for smoking articles, comprising: a bottom sheet having a rated air permeability; and a plurality of spaced apart belt regions each having a sufficient additive material, wherein the cigarette paper has a bottom portion in the belt region The air permeability of the sheet is low in gas permeability, wherein the front edge of each belt region is serrated, and the trailing edge of each belt region is serrated, and wherein the bottom edge and the trailing edge of the rake edge of each belt region are The width of the continuous portion between the bottoms of the cornices is less than the spacing between the trailing edge teeth and the leading edge molars in the continuous belt region. The cigarette paper of claim 1, wherein the dents of the leading edge are laterally aligned with the rim of the trailing edge, and the rims of the leading edge are laterally aligned with the trailing edge. tooth. The cigarette paper of claim 1 or 2, wherein the rim of the leading edge and the ridges of the leading edge have substantially the same lateral dimension in the zone. A smoking article comprising a tobacco rod and a cigarette paper as claimed in claim 1. The smoking article of claim 4, wherein the cigarette paper has a lateral length that is included in the circumference of the tobacco rod. For example, in the smoking article of claim 4, the teeth of the leading edge slow down the progress of the smoking of the smoking article. For example, in the smoking article of claim 4, when the ignited smoking article is placed on a platform, the teeth of the leading edge slow down the progress of the smoking of the smoking article. For example, in the smoking article of claim 4, wherein the leading edge of the mouth allows a limited amount of continuous smoldering during the free combustion state. The smoking article of claim 4, wherein the leading edge comprises at least two mouthwashes and at least two molars.