KR101503551B1 - Smoking article with novel wrapper - Google Patents

Abstract

The smoking article 20 has a pattern 34a, 34b, 34c, 34d, 36d 'on which a film forming mixture is applied to the wrapping paper 24 to reduce the permeation sheer. The pattern has a film forming mixture disposed only on the side of the smoking article where at least two longitudinal positions along the length of the tobacco rod are not in contact with the substrate when the smoking article is placed on the substrate. In this longitudinal position, the limited airflow caused by the placement of the film forming mixture on the side while the substrate is positioned is sufficient to make the smoking article self-extinguishing. However, when the smoking article is lifted by the smoker, the position of the film forming mixture itself does not cause self-extinguishing of the smoking article. Therefore, necessary self-combustion performance is maintained.

Wrapping paper, smoking article

Description

[0001] Smoking article with novel wrapper [0002]

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates generally to smoking articles, and more particularly to smoking articles having a pattern in a wrapping paper to reduce ignition burning smoking articles when placed on a substrate.

The smoking article comprises a tobacco rod having a wrapping paper formed into a base web having a nominally permeability. The zones of add-on material are preferably attached to the base web according to a pattern comprising a plurality of circumferentially spaced apart regions longitudinally spaced along the tobacco rod. Each region preferably has at least two substantially opposed adherent zones, which exhibit a permeability that is smaller than the nominal permeability. The adduct zone preferably has sufficient size, shape, and additional material concentration, and when the tobacco rod is loaded and placed on the substrate, the tobacco rod will be extinguished in the corresponding area. The zones of the second zone in the first, second and third consecutive zones are circumferentially spaced from the zone of the second zone. In addition, the zones of the third zone are circumferentially spaced from the zones of the first zone and the second zone.

The pattern is preferably substantially extended along the tobacco rod such that the tobacco rod rests on the substrate and at least one region is positioned at one end such that the attachment region is substantially located on the side of the tobacco rod.

The smoking article preferably exhibits a pyrogenicity of only about 25% and a self-extinguishing value of only about 50%.

The smoking article according to the present invention preferably has a wrapping paper having a pattern formed of a film-forming mixture with reduced permeability. This pattern is selected so that the smoking article is self-extinguishing when the smoking article is placed on the substrate, wherein the projected burning line reaches at least one longitudinal position and the film forming mixture does not contact the substrate at this position This side with the film-forming mixture or agonist, which is located on the side, will not allow the smoking article to self-digest when the smoker is holding it. Thus, the pattern can be selected in view of the blocked air flow through the sides or side portions of the smoking article in contact with the substrate. By doing so, the smoking article can have both reduced ignition and satisfactory free combustion quality.

The smoking article may have a circular or circular cross section, which means that any side or side portion of the smoking article can be placed in contact with the substrate, such as when the smoking article falls on the surface or left on the surface. In this regard, the pattern described herein forms side or side portions having a film forming mixture that is not in contact with the substrate, regardless of the direction when the substrate is contacted. The smoking article may have a non-circular cross section.

The wrapper and its adjunct areas may each have a plurality of discrete shapes extending less than the length of the tobacco rod. At a longitudinal position spaced along each of the plurality of tobacco rods, only the first and second shapes of the pattern are located within a cross-section substantially perpendicular to the longitudinal axis of the tobacco rod. In one such position, the first shape is disposed on only the first side of the smoking article and the second shape is disposed only on the first side of the smoking article. The first and second features may be spaced apart by substantially 180 degrees and may have porosity that is substantially less than the porosity of the base web. If desired, a plurality of discontinuous features may be arranged such that the plane of the cross-section through the tobacco rod intersects at least two such discontinuous features.

Many objects and advantages of the present invention will become apparent to those skilled in the art upon reference to the accompanying drawings, wherein like reference numerals are used for like elements.

1 is a perspective view of a smoking article according to a first embodiment of the present invention.

Fig. 2 is an enlarged view of an unpacked portion of the wrapper used in the manufacture of the smoking article of Fig. 1;

3 is an enlarged plan view of a wrapping paper for a smoking article illustrating a second quadrilateral pattern.

4 is an enlarged plan view of a wrapping paper for a smoking article illustrating a third quadrilateral pattern.

5 is an enlarged plan view of a wrapping paper for a smoking article illustrating a fourth quadrilateral pattern.

6 is an enlarged plan view of a wrapping paper for a smoking article illustrating a triangular pattern.

7 is a side view of a smoking article using the wrapping paper of Fig. 3, wherein the smoking article is on the substrate and the first side portion of the smoking article is in contact with the substrate.

Figure 8 is a side view of a smoking article using the wrapping paper of Figure 3, wherein the smoking article is on the substrate and the second side portion of the smoking article is in contact with the substrate.

9 is a side view of a smoking article using the wrapping paper of Fig. 3, wherein the smoking article is on the substrate and the third side portion of the smoking article is in contact with the substrate.

10 is a cross-sectional view of the smoking article obtained along line 10-10 of Fig. 7;

11 is a cross-sectional view of the smoking article obtained along line 10-10 of Fig.

12 is a cross-sectional view of the smoking article obtained along line 10-10 of Fig. 7;

FIG. 13 is an enlarged fragmentary view of a smoking article positioned above a substrate and showing air flowing into the smoke coke. FIG.

14 is an enlarged fragmentary view of the smoking article removed from above the substrate and shows the air flowing into the smoldering coal.

According to the present invention, a first embodiment of a smoking article 20 (see Figure 1) comprises a tobacco rod 22. The tobacco rod 22 may have a cut pillar of a cigarette and is wrapped with a wrapping paper 24. One end of the smoking article 20 may have an appropriate filter 26 wrapped with a suitable filter tip finger 27. The smoking article 20 may typically have a generally circular cross-section over the entire length of the smoking article. Nevertheless, other cross-sectional shapes including, for example, ellipses are within the scope of the present invention. The tobacco rod 22 has a nominal length L measured from the rim of the tipping paddle 27 to the free end of the tobacco rod 22 along the longitudinal axis A of the article 20. By way of example, the nominal length can range from about 60 mm to about 100 mm.

The wrapper 24 has a base web that is typically air permeable. The permeability of the wrapper is typically identified in Coresta units. The Coresta unit measures the column permeability at a volumetric flow rate (i.e., cm 3) per unit area (i.e., cm 2) per unit pressure drop (i.e., cm of head). The base web of conventional wrapping paper is also measured in grams per square meter and has a basis weight, abbreviated as "gsm ". The permeability and basis weight suitable for the bay sweep of a typical smoking article wrappings commonly used in manufacturing are set forth in the table below.

Permeability, Coresta Unit Basis weight, gsm 24 25 33 25 46 25 60 26

table

For purposes of the present invention, the base web 24 of the preferred wrapping paper has a permeability of at least about 20 Coresta units. Most preferably, the wrapper has a permeability greater than about 30 coresta, such as a common base web having a basis weight of about 33 and about 46 coresta and a basis weight of about 25 gsm. In one embodiment, the base web may have a permeability value that is greater than about 60 Coresta, or greater than or equal to 80 Coresta.

Referring to Fig. 2, the wrapper further comprises an adjunct area (similar to the opposing section 34d, 36d) at a location spaced along the tobacco rod 22 of Fig.

Each rectangular zone (e.g., 34a and 36a - the latter not visible in FIG. 1) forms a circumferential zone 31 (e.g., area 31a).

The "width" of the banded area 31a is measured from the front edge 7 of the area 31a (which is closest to the approaching cores) to the rear edge 9 (which is the farthest from the approaching cores). Preferably, for example, the width of region 31a is in the range of about 5.5 mm to about 12 mm, more preferably about 7 mm to about 10 mm, and most preferably about 8 mm to 9 mm. Also, in each circumferential region, such as region 31a, zones 34a and 36a are circumferentially spaced to be disposed opposite each other along the opposite side of the wrapper 24 when formed on the tobacco rod 22 do. Preferably, each zone 34a, 36a is in the range of about 5 mm to about 9 mm in cross direction (i.e., cross measurement relative to the paper web), more preferably in the range of about 6 mm to about 7 mm in cross measurement It stretches.

Conventionally, in describing the dimensions of the various embodiments herein, it should be noted that the "width" extends in the length direction of the tobacco rod and the circumferential dimension is represented by "crossing" or "cross direction & do.

The portion 33 of the base web of between the adjacent regions 31a and 31b and between the opposing regions in each region (such as between the regions 31b and 36b facing each other) (E.g., there is no additional material that constitutes zones 34b and 36b).

The longitudinal distance between adjacent regions (such as between regions 31a and 31b) is related to the band spacing 33, which is preferably from about 4 mm to about 12 mm, and more preferably from about 6 mm to about 8 mm.

Preferably, each opposed region 34, 36 of each region 31 is spaced apart to some extent (according to the instructions below) from the preceding row or region, and a sufficient number of regions 31 are located within a given tobacco rod (According to the selection of the band region width and the band region spacing), and when the smoking article is placed on the substrate, each pair of zones 43, such as opposite pairs of zones 34b, 36b of Figure 1, At least one position appears along the tobacco rod 22 when facing the tobacco rod 22. It is most likely that self-extinguishing occurs at or around this portion of the tobacco rod 22 (position 101). The location of the tobacco rod 22 where this tendency most closely occurs is referred to hereinafter as the " oriented snuffer region 101 ".

Because the smoking article 26 may be laid on the substrate differently than shown in Figure 1 and / or the pattern of the area may be different, the orientated snarper region 101 may be located on another rotation of the tobacco rod 22 Position relative to the tobacco rod 22 relative to the position of the tobacco rod 22. The pattern of zones and band spacing (33) is selected so that one or more orient snub ng areas (101) are located along the tobacco rod (22).

Preferably, each zone 34, 36, 36 'has sufficient additional material to reduce the permeability of the wrapper in each zone from about 0.0 to about 10 coresta, more preferably about 7 coresta or Less than that.

For purposes of the present invention, the pattern of additional material is applied to the wrapper 24 to obtain improved ignition characteristics and also to obtain improved self-extinguishing properties. Ignition is a standard test method for measuring the ignition power of a smoking article, which is a standard test conducted as described in ASTM E 2187-04, which is incorporated herein by reference in its entirety. The ignitability measures the likelihood of generating sufficient heat to maintain static burning of the tobacco rod 22 when the smoking article is placed on the substrate. A low value of flammability is associated with reducing the likelihood that a smoking article in combustion will cause complete combustion on the underlying substrate.

Here, self-extinguishment is associated with the smoke trait of a smoking article under free-burning conditions. To evaluate self-extinguishment, laboratory tests are carried out at a temperature of 23 ° C ± 3 ° C and a relative humidity of 55% ± 5%, all of which shall be monitored by recording the temperature and humidity. The exhaust hood removes the combustion products formed during the experiment. Prior to the experiment, the smoking article to be tested is conditioned for 24 hours at a relative humidity of 55% ± 5% and a temperature of 23 ° C ± 3 ° C. Immediately prior to testing, the smoking article is placed in a glass beaker to ensure free air access.

Self-extinguishing experiments are carried out in enclosures or test boxes. Single port smoking machines or electric lighters are used to ignite experimental smoking articles. During the experiment, the instrument or "angle holder " is experimented by capturing the end of the smoking article at 0 degrees (horizontal), 45 degrees, and / or 90 degrees (vertical). 20 smoking articles are tested at 0 degree, 45 degree, and 90 degree positions, respectively. If more than one appliance is used, the appliance is preferably arranged so as not to face each other in order to prevent the smoking articles from interfering with each other. If the smoking article is turned off before the front line where the smoking cigarette reaches the tipping point, the result is recorded as "self-digestion", whereas if the smoking article continues to be smoked until the front line where the smoking cigarette reaches the tipping paper If so, the result will be recorded as "not self-digesting". Thus, for example, a self-extinguishing value of 95% indicates that 95% of the tested smoking article was self-extinguishing under free-burn conditions, while a 20% self-extinguishing value indicates that 20% of the tested smoking article was self-extinguishing under free- .

Self-extinguishing values may be referred to as "self-extinguishing values at 0 degrees", "self-extinguishing values at 45 degrees", or "self-extinguishing values at 90 degrees" . In addition, self-extinguishing values can be referred to as "self-extinguishing averages", which refers to the average of three angular positions. In other words, it is the average of "self-extinguishing value at 0 degrees", "self-extinguishing value at 45 degrees" and "self-extinguishing value at 90 degrees". It does not distinguish between "self-extinguishing value" or "self-extinguishing value at 0 degrees", "self-extinguishing value at 45 degrees", or "self-extinguishing value at 90 degrees" Can be referenced.

As used herein, the phrase " self-digesting under free-burning conditions "or" self-extinguishing under free-burning conditions "refers to digesting smokeless tobacco smoke when such cigarettes are dominated or exposed to free- .

As is now understood, the staggered area of the additional material according to the present invention is designed in a beneficial combination of low ignitability value and low self-extinguishing value of the smoking article 20 (see FIG. 1). The pattern of the low permeability zone of the additional material provides the area of the film forming mixture along the length of the monolayer rod 22 and provides the area of the smoking article 20 which is lighted in cooperation with the substrate when the tobacco rod 22 is placed on the substrate And the area of additional material (such as a film forming mixture) causes statistically less self-extinguishing when the smoking article 20 is held by a smoker under free-burn conditions. Thus, the smoking articles 20 can exhibit reduced ignition propensity while maintaining a satisfactory free combustion quality or a low self-extinguishing value by attaching the pattern 30 of the film-forming mixture to the base web in accordance with the present invention.

2) is attached to the base web 24 of the wrapping paper, preferably at the base web 24 as shown in Fig. 2, to achieve the desired flammability and self-extinguishing properties of the smoking article. Is in an unfolded state or has a wrapping paper for the base web to break into the bobbin. It is an object of the present invention to provide a wrapper having an IP value less than 25 and an auto-extinguishing value less than 50 when formed into the tobacco rod 22. More preferably, the IP value of the final smoking article is less than about 15, and most preferably, the IP value of the final smoking article is less than about 10. A smaller self-extinguishing value is also desirable. In this regard, a more preferred self-extinguishing value is less than about 25, and the most preferred self-extinguishing value at the same time is less than about 10.

2, the transverse dimension of the wrapping paper 24 is selected on the basis of the diameter of the finished smoking article (from about 7 mm to about 10 mm) and allows overlapping material in longitudinal shims of about 1 mm to 2 mm. For example, if 1 mm overlapping material is allowed, the wrapping paper cross web dimension may be about 27 mm for a smoking article having a circumference of about 25.6 mm.

Preferably, the pattern is attached to the base web so that a plurality of circumferentially extending regions 31a, 31b, 31c, 31d (formed by the dashed line in Figure 2) (See Fig. The additional material may be attached to one side or both sides of the base web. Preferably, three to six, and most preferably four to six or more regions 31 are located within the nominal length of the tobacco rod 22. Each circumferential region 31a, 31b, 31c and 31d is connected to a tobacco rod 22 which is smaller than the nominal length of the tobacco rod 22 (i. E., Measured along the tobacco rod from the start of one region to the start of the adjacent region) Length) along the longitudinal direction. By selecting the longitudinal pitch length at about 25% of the nominal length, four areas will be provided for each tobacco rod 22. [

At least two additional materials are provided in each circumferential region, for example, (34a, 36a), such as (31a). All in-drawing adjunct areas are matched by moving them to match. However, within such a smoking article or wrapper for smoking articles, this adherent area may or may not be visually identified. Each zone is preferably circumferentially spaced so that the zones in the finished tobacco rod 22 will face each other. The zones 34b and 36b of the two zones 31b for the three zones 31a, 31b and 31c are preferably spaced circumferentially from the zones 34a and 36a of the first zone, ). Furthermore, the zones 34c and 36c of the third zone are preferably circumferentially spaced from the zones 34b and 36b of the second zone 31b and are also spaced from the zones 34a and 36a of the first zone, Direction.

As shown in Figure 2, the additional zones of each zone in the present invention are spaced laterally in the circumferential direction from the adjoining zones of the adjacent zones by distance, which is the crossing dimension of the additional zone. Each zone having a width measured along the tobacco rod 22 and a dimension measured crosswise in the circumferential direction of the tobacco rod 22. In this embodiment, the zone width is smaller than the longitudinal pitch of the associated area. 2, the length of the longitudinal pitch may be greater than the width of the corresponding zone of the corresponding zone. The additional zone of the zone following the tobacco rod 22 is preferably spaced from the zone of the adjoining zone Thus, a pattern 30 is formed in an area covering a part of the base web along an inclined line with respect to the rim of the base web. In addition, the pattern of additional zones can be at least partially repeated along the length of the base web.

In the illustrated embodiment (Figure 2), each zone is placed on the wrapper 24 so that the zone is centered on one of the three passages 34,36, 38, which corresponds to the corresponding dashed line 34 , 36, 38). Thus, for example, passageway 34 passes through the corresponding geometric shapes of six zones 34a, 34b, 34c, 34d, 34e, and 34f. Each zone is spaced from the other zones, but the zones are selectable so that they can touch each other. The passages 34, 36, 38 are parallel to each other and form an acute angle? With respect to the lateral edge of the wrapper 24. Zone 36 'is preferably identical to zone 36 and protrudes through the pattern shown in FIG. 2, zone 35 terminates along one rim, zone 34' It starts with. For example, each pair of cross web alignment areas, such as zones 34a, 36a or zones 36a, 36b, can cover up to about 33% of the total surface area of the corresponding areas 31a, 31b. In the rectangular zone, each zone preferably has a length or width in the range of about 8 mm to about 10 mm, and has a cross measurement direction for the circumference in the range of about 5 mm to about 7 mm. The longitudinal spacing 33 between zones preferably ranges from about 4 mm to about 12 mm, more preferably from about 6 mm to 8 mm. The circumferential spacing of the adduct zone preferably ranges from about 3 mm to about 20 mm, more preferably from about 5 mm to 8 mm, and most preferably from about 5.5 mm to about 7.0 mm.

When the wrapper 24 is formed in the cigarette to make the tobacco rod 22, the adherent zones in any longitudinal position are preferably spaced about 180 degrees from each other. Also, the ratio of the area occupied by the adjunct area relative to the total area (the total area corresponds to (i) the area 31d and (ii) the sum of the circular areas between adjacent areas on one side, Quot; ratio ") is substantially less than one. Preferably, the zone area ratio is in the range of about 20% or less to about 50% or less, more preferably in the range of about 20% or less to about 35% or less. More specifically, in some embodiments, the percent area coverage of the occupancy of the entire area may be less than about 30%, and even less than 25%. Generally speaking, a high value (ie, close to 1) maintains a low zone coverage rate because it is believed to increase carbon monoxide concentration in the mainstream where low permeability (ie, low Corstar) wrappers are used in the tobacco rod .

When the wrapping paper 24 is formed to make the tobacco rod 22, the passages 34, 36 and 36 'are formed such that the first spiral passages 36/36' (the zones 36 and 36 ' (Having a spirally aligned section 34) and a second spiral passage 34 (which is joined to form a second spiral passage 36/36 ') and which, as illustrated in Figures 7 to 9, A) of the tobacco rod 22 and extends beyond the length of the tobacco rod 22. The helical passages 36/36 ', 34 (shown in FIG. 2) have helical angles phi and do not intersect with each other. Preferably, both of the spiral passages can follow either the counterclockwise or clockwise direction with respect to the tobacco rod 22. As illustrated, both passages 34 and 36 'follow the clockwise passage and begin at the filter end of the tobacco rod 22, when viewed from the lit end towards the filter end.

The area of the pattern 30 may be formed by attaching one or more aqueous film forming compounds to the base web of wrapping paper to reduce the permeability of the wrapping paper in this area. Optionally, the cellulosic material may be used to form the zone. Where a film-forming mixture is used, the film-forming mixture may preferably comprise, for example, from about 20% to about 50% by weight of water and an occluding agent. The film forming mixture may comprise one or more occlusive agents such as starch, alginate, cellulose or gum, and may also contain calcium carbonate as a filter. Starch is a film-forming mixture with a concentration of about 24%. The film forming mixture may be applied to the base web of wrapper 24 using gravure printing, digital printing, coating or spraying with a template, or other suitable technique. For example, the film-forming mixture described in U.S. Patent Application No. 11 / 500,918 and the method of applying the film-forming mixture are incorporated herein by reference in their entirety and may be selected to attach the pattern to the base web of the wrapper . If desired, the adduct zone may be formed by printing multiple successive layers, for example two or more successive layers aligned or aligned with one another. Also, when a layer is used to form the adduct zone, the materials in the layer may be the same or different. For example, one layer may be starch and the other layer may be starch and calcium carbonate (or vice versa).

A preferred embodiment of the pattern 30 of adherent zones is illustrated in Fig. Like the embodiment of FIG. 2, the adduct zone of FIG. 3 is quadrilateral, and in particular is generally rectangular. Preferably, for example, at least two adduct zones 40a, 40b are attached to the respective zones 31a, 31b, 31c, 31d and circumferentially spaced within the finished smoking article. The circumferential dimension of each zone 40a and 40b is preferably selected to be less than about 50% of the cross measurement of the base web 24 when not packaged and most preferably is selected to be less than about 50% 24) or about 25% of the circumference cross measurement. The circumferential dimension of each zone 40a, 40b when placed in a circumferential spacing between zones 40a, 40b is preferably about 50% of the circumferential cross measurement of the base web 24.

The sum of the length of the zones 40a and 40b and the longitudinal spacing 33 (i.e., the longitudinal pitch length) between the zones 40a and 40b and the zone zones 40b and 42b is preferably 3 or 4 The three zones 31a, 31b, 31c and 31d are located within the nominal length of the tobacco rod 22 of the smoking article and the additional zones of the adjacent zones are longitudinally spaced from each other. Preferably, the longitudinal extent or "width" (i.e., the area width or area width as defined above) of zones 40a and 40b ranges from about 8 mm to about 10 mm. The circumferential spacing x between (i) zones 42a and 42b of region 31b and (ii) zones 40a and 40b of region 31a is preferably from about 10% to about 35% Cross-measure the unpackaged base web 24. More preferably, the circumferential spacing (x) is in the range of about 12% to about 35% of the total, cross-measuring the unpackaged base web 24. Most preferably, the circumferential spacing (x) is about half of the circumferential dimension or cross measurement of the additional zones 40a, 40b. Adjacent zones of the other zones 31c, 31d are likewise spaced further circumferentially by the same spacing x relative to one another. It should be noted, for example, that in the region 31d the adhering regions 46a, 46c are divided between the two edges of the base web 24 when the base web is unpacked.

The pattern applied to regions 31a-31d is preferably repeated along the length of the base web 24. [ Obviously, if the circumferential spacing (x) is less than 12,5% of the width of the cross direction of the base web, then four or more areas will form a complete cycle or phase length for the pattern 30. Conversely, if the circumferential spacing (x) is greater than 12.5%, no more than four regions will form a complete cycle or phase length for the pattern 30 (as in the case of the pattern of FIG. 2).

Another embodiment of the pattern 30 (see Fig. 4) uses a quadrangle adherent zone 60a, 60b, i.e. a substantially parallelogram zone. When the wrapping paper is formed into the tobacco rod 22, the sections 60a and 60b are arranged so as to be arranged in a general spiral manner with respect to each other, and the arrangement of the parallelograms 60, 62, 64 and 66 can be selected as desired. For example, a symmetric image of the shape (which is symmetrical with respect to the longitudinal direction) can be used, even without a common spiral mark. Likewise, the distortion of the parallelogram zone can be changed as desired. However, in general, the circumferential dimension, circumferential spacing or spacing, longitudinal dimension, longitudinal spacing or spacing of zones (60, 62, 64, 66) and regions (31a-31d) Can be selected as described above.

Another embodiment (see FIG. 5) of the pattern 30 uses a quadrangular adherent zone 70, 72, 74, 76, i.e. a substantially trapezoidal zone. In other words, generally the trapezoidal sections 70a, 72a can be banked to be in a general spiral alignment with one another when the wrapping paper is engaged into the tobacco rod 22. In addition, the actual shape of the trapezoidal zones 70, 72, 74, 76 can be selected as desired. For example, the ratio of the twist in the trapezoidal area and the trapezoidal area can be selected as desired. However, the spacing of the circumferential dimension, the circumferential spacing or spacing, the longitudinal dimension, and the longitudinal spacing or spacing (60, 62, 64, 66) and the regions (31a-31d) Can be selected together. The front edge 7 is preferably longer than the two parallel rims of the zone 70.

Another embodiment of the pattern 30 (see FIG. 6) generally uses a triangular adherent region 80, 82, 84, 86. Adjacent adherent regions 80a and 82b of a generally adjacent side region 31b are fabricated and arranged to contact the corresponding common triangular regions 82a and 82b of the adjoining region 31b. If necessary for the IP and SE characteristics, the general triangular zones 82a and 82b of the first zone 31a may be spaced longitudinally from the triangular zones 82a and 82b of the adjacent zone 31b. Depending on the characteristics required for the smoking article design, the burning coils of a smoking triangular region of the smoking triangle meet with a gradually increasing cross direction dimension (i.e., from right to left in FIG. 6) of the triangle vertices and the general triangular area Or the burned coils of the smoked smoking article may meet the base of the triangular area and suddenly increase in the low permeability area (i.e., from left to right in FIG. 6). The circumferential spacing of the triangular zones 80, 82, 84, 86 and the size of the triangular zones may be determined according to a preferred range set outside the scope of the present invention. In addition, the triangular area may be an isosceles triangle, an equilateral triangle, a right triangle, or any other desired triangle as depicted. However, in general, the circumferential dimension, circumferential spacing or spacing, longitudinal dimension, longitudinal spacing, or spacing of zones (80, 82, 84, 86) and zones (31a-31d) Can be selected as described above. Preferably, the triangle of zone 80 is oriented to form a front rim 4 (closest to the approaching cores).

Another position of the smoking article 20 placed on the substrate 98 is an illustration of the co-operation that takes place between the low-pervious adherent zone and the substrate 98. 7) illustrates a side view of a smoking article 20 according to the present invention. When the smoking article is turned at an angle of 45 degrees with respect to the longitudinal direction (clockwise from the left end of Fig. 7), the height becomes similar to that shown in Fig. Similarly, when the smoking article is reversely turned at another 45 degree angle (clockwise from the left side of Fig. 7), the height becomes the height shown in Fig. In each of Figures 7 to 9, at least one pair of adherent zones are provided along the length of the tobacco rod 22, for example the zones 92, 92 'of Figure 7, the zones 94, 94' In the region 96, 96 'of the smoking article. In this position (FIG. 12) where the adjunct area is located substantially on the side of the smoking article 20, the zones 92, 92 'are upright or generally perpendicular to the surface of the substrate 98. The direction of the zones 92 and 92 'is well illustrated in FIG. 12, wherein the facing zones 92 and 92' are located on the corresponding opposite sides of the smoking article 20 when viewed in cross section, Is diametrically substantially parallel to the surface of the substrate (98).

The orientation of the adherent zone at different longitudinal positions along the smoking article 20 is shown in Figs. 10 and 11. Fig. In FIG. 10, the additive zones 90, 90 'are positioned such that one zone 90 is in contact with the substrate 98. The zones 94, 94 'of the smoking article 20 of FIG. 7 will also be positioned as seen in FIG. 10 when viewed from the right end of FIG. 11, one zone 96 'contacts the substrate 98, while the other facing zone 96 is located at the top of the smoking article 20. 7-9, regardless of each position of the smoking article 20 having the pattern of the illustrated adjunct site, at least one pair of adjunct site is rotated between these positions as shown in FIG. 10 or 12, Location < / RTI > This location is referred to above as the Oriented Snurper area 101.

The zones 92 and 92 'block air flow to the burned coils of the tobacco rod 22 by their reduced permeability when the smoking article 20 is in a free-burning condition (see FIG. 14). On the other hand, the bottom 104 of the wrapper allows air to freely enter the sides of the tobacco rod 22 to assist in the complete combustion of the coils. A very different situation occurs when the smoking article 20 is placed on the substrate 98 (see Fig. 13). At this time, the substrate 98 blocks the flow of air to the bottom of the tobacco rod 22. The zones 92, 92 'and the substrate 98 cooperate to form very small areas 100, 102 through which air can be sent through the base web. More specifically, the vertical area 102 between the bottom of the area 92 and the substrate 98 and the vertical area 102 between the bottom of the area 92 'and the substrate 98 allow air to flow through the tobacco rod 22, The smoke of I reduce the area that can pass through to reach the coil. When the combustion line reaches the adjunct area located as shown in FIG. 13, the exhausted coil is self-extinguished due to the lack of oxygen in the air. The substantially reduced area for air to assist combustion of the coils is located in the rotational position of the tobacco rod 22 between the position illustrated in Figure 10 and the position illustrated in Figure 12, 12 shows the most reduced position in the area accessible to the air flow. Likewise, if the smoking article is in the position shown in Figure 13 with any other pair of adherent zones, and the substrate 98 is placed in this position, self-extinguishing may occur as in the other pair of zones easy.

However, as shown in FIG. 11, when the smoking article is placed on the substrate 98 so that one adhering area is in contact with the substrate 98, And the degree of material cooperation for reducing the area between the substrate 98 and the additional area is smaller than that occurring in the snurper area 101. [

In the above example, the reduction in the ignitability value, the decrease in the self-extinguishing value, and the improved free combustion quality of the smoking article 20 with the wrapping paper on which the pattern 30 is formed make it possible for the smoking article to be heated in three specific directions ), And this direction is offset 45 degrees from each other (offset). Naturally, this explanation went on this way for the sake of brevity. Regardless of the side on which the pattern according to the present invention lies with respect to the substrate 98 and to which the smoking article is self-extinguished without the need to apply the film-forming mixture to the wrapping paper to the extent that the desired free combustion quality of the smoking article is lost It should be understood. This can be appreciated by recognizing that the facing area of the film forming mixture need not appear at a position exactly 90 degrees from the side portion in contact with the substrate 98. This zone may be centered at a location that may be close or farther from the side that is in contact with the substrate 98, for example between about 60 and 120 degrees from the side that is in contact with the substrate 98.

Also, in a specially selected pattern, the ability to self-extinguish the smoking article depends on having a minimum length range of additive (e.g., a film forming mixture) rather than having a film forming mixture weight per area defined in the longitudinal position. For example, the length of the rectangular zone may be about 5.5 mm for a particular design, base web, and film forming mixture to use. The amount of film-forming mixture used can be increased without losing the free combustion quality, generally to improve ignition performance, and can be attached to the wrapper to aid in a much higher level of combustion accelerator if necessary.

Preferably, the additional material zone reduces the permeability of the wrapper to a range of about 0 to 10 Coresta.

In the past, a 3: 1 ratio of permeability between the base web and the adjunct area was insufficient to digest the smoking article, because there was insufficient reduction in the permeability of the wrapper in the longitudinal direction. However, beyond the circumferential portion of the smoking article, its permeability ratio is such that when the additional material is located on the side of the smoking article without contacting the substrate 98, and when the substrate 98 is underneath, It may be sufficient to extinguish.

Thus, the spirally-rotated position of the facing adherent region has a sufficient amount of contact with the substrate 98, regardless of which side portion of the wrapping paper lies against the substrate 98, It is realized that the zone and the substrate 98 can cooperate to self-extinguish the smoking article when it reaches the floor, and at least one longitudinal position with the film-forming mixture at the side is always located. This fact leads to improved ignition performance of the smoking article and allows the smoking article to be designed with an ignitability value of less than 25%. Nevertheless, in the absence of the substrate 98, the smoking article retains free combustion without being self-extinguishing, as it is carried by the smoker. This fact leads to improved self-extinguishing performance of the smoking article and allows the smoking article to be designed to an ignitability value of 50% or less, which self-extinguishing value may be an auto-extinguishing average value. At zero degrees the self-extinguishing value may be much lower than the SE average value and may be less than 25%.

In the embodiment described above, the smoking article generally has a circular cross-section. Thus, it is possible for any side of the smoking article to rest on the substrate 98. However, the pattern described herein is not limited to the above-described combustion characteristics (ignitability value of 25% or less and E value of 50% or less) regardless of which side of the smoking article is placed on the substrate 98, It can be achieved. Preferably, the pattern is such that when the base web is wrapped around the tobacco rod 22, the area of the film forming mixture does not contact the substrate 98 at one or more longitudinal positions along the tobacco rod 22, Lt; / RTI > Having at least one longitudinal position with the film forming mixture in the side position may be such that the smoking article is placed on the substrate 98 after the burning line that extinguishes the smoking article has protruded through a portion of the smoking article, When the smoking article is placed on the substrate 98, it is preferable that the sides of the adhering area are always relatively close to the combustion line.

If desired, the adjunct region may have a geometry other than a quadrangle that includes, for example, an ellipse, another polygon, or the like.

Also, the spiral angle? Described above can be increased while maintaining the dimensions of the zone as in the illustrated embodiment. This change can place a pattern overlapping the zones (or at least close proximity to each other in the zones). Optionally, the stepped spiral pattern may be formed by increasing the cross direction dimension of the zone or patch, while the spiral angle is the same as in Fig. 2, and a zone of the same size as shown in Fig. (There are twelve instead of six patches along the passage 34) between the passages 34, 36 and 36 '.

When the word " about "or the word" about "is used in reference to a numerical value, the intent corresponds to the word" about " .

It will be apparent to those skilled in the art that this specification describes new, useful, and difficult to understand smoking articles. It will be apparent to those skilled in the art that many changes, variations, substitutions, and equivalents will be apparent to those skilled in the art in view of the various embodiments of the article described above. Accordingly, it is evident that all such changes, modifications, substitutions and equivalents are within the spirit and scope of the present invention as defined by and encompassed by the appended claims.

Claims (18)

A smoking article comprising a tobacco rod with a wrapping paper, the wrapping paper having a base web having a nominally permeable and an adherent zone formed according to the pattern, Wherein the pattern comprises a plurality of circumferential regions at locations spaced along the tobacco rod, each region having at least two adherent regions having a permeability less than the nominal permeability, The water zones are situated opposite each other and at least for each successive first zone, second zone and third zone, the zones of each second zone are circumferentially spaced from the zones of the respective first zones, The zones of the zones being circumferentially spaced from the zones of the respective first zones more than the zones of the respective second zones, Wherein the pattern is sufficiently repeated along the tobacco rod such that when the tobacco rod is placed on the substrate and at one end the at least one region is in a direction such that each zone is located along a side portion of the tobacco rod, Wherein said areas are sized, shaped, and adhered so that said tobacco rod is self-extinguishing in at least one area within said direction when said tobacco rod is placed on a substrate in a smoked state. article. 3. The article of claim 1, wherein the pattern has an additional area, wherein the adjunct zone is further circumferentially spaced from a zone of the first zone than a zone of the zone immediately preceding the additional zone. A smoking article comprising a tobacco rod having a flammability of less than or equal to about 25%, a self-extinguishing value of less than or equal to 50%, a nominal length, and a wrapper, A base web having a nominal permeability; And And at least two adherent zones extending along a nominal length of the tobacco rod and each having a permeability less than a nominal permeability, each of the adherent zones having a plurality of regions facing each other, Wherein said area of said wrapping material is laterally spaced from an adjacent area. 4. The article of claim 3, wherein the region has a longitudinal pitch length along the tobacco rod, and wherein the adjunct region has a longitudinal width less than the longitudinal pitch length. 4. The smoking article of claim 3, wherein the base web has a permeability of greater than about 20 coresta. 4. The article of claim 3, wherein each of the regions has at least two additional zones circumferentially spaced about the tobacco rod. 7. The smoking article of claim 6, wherein each further zone comprises a layer of a starch compound. 4. The article of claim 3, wherein each of the regions is laterally spaced from an adjacent region by a distance corresponding to a cross-sectional dimension of the additional region. 4. The article of claim 3, wherein each region is laterally spaced from adjacent regions to form a spiral array along a base web of the adjunct region. delete delete delete delete delete delete delete delete delete

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