KR20100021629A - Smoking article with novel wrapper - Google Patents

Abstract

A smoking article 20 has a pattern 34a, 34b, 34c, 34d, 36d' of permeability reducing film forming compound applied to the wrapping paper 24. The pattern is configured so that when a smoking article is placed on a substrate, at least two longitudinal locations along the length of the tobacco rod have film forming compound located only on sides of the smoking article not in contact with the substrate. At these longitudinal locations, the restricted airflow to the tobacco due to the presence of the substrate, in combination with the film-forming compound located at the sides is sufficient to cause the smoking article to self-extinguish. However, when the smoking article is held by a smoker, the presence of the film-forming compound does not by itself cause the smoking article to extinguish. A desirable self burn capability is therefore maintained.

Description

Smoking article with wrapping paper {Smoking article with novel wrapper}

The present invention relates generally to smoking articles, and more particularly to smoking articles having a pattern on a wrapper to reduce the flammability of burning the smoking article when left on a substrate.

The smoking article has a tobacco rod with a wrapper formed from a base web having a nominal permeability. Zones of add-on material are preferably attached to the base web according to a pattern comprising a plurality of circumferentially spaced regions, longitudinally spaced along the tobacco rod. Each region preferably has at least two substantially opposite adjunct regions, which exhibit permeability less than the nominal permeability. The adjunct zones preferably have a sufficient size, shape, and additional material concentration, and when the tobacco rod rides over 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 offset from the zones of the second zone. Further, the zone of the third zone is offset in the circumferential direction from the zones of the first zone and the second zone.

The pattern preferably extends substantially along the tobacco rod such that when the tobacco rod is placed over the substrate and viewed from one end, at least one region will be positioned such that the adjunct zone is substantially in the side of the tobacco rod.

The smoking article preferably exhibits only about 25% of ignition and only about 50% of self-extinguishment value.

The smoking article according to the invention preferably comprises a wrapping paper having a pattern formed of a film forming mixture with reduced permeability. This pattern is selected such that the smoking article is self-extinguishing when the smoking article is placed on a substrate, wherein the protruding combustion line reaches one or more longitudinal positions, whereby the film forming mixture does not contact the substrate. Located on the side but with the film forming mixture or agent, this side will not allow self-extinguishing of the smoking article when the smoker is holding it. Thus, the pattern can be selected in consideration of the blocked air flow through the side or side of the smoking article in contact with the substrate. In this way, the smoking article can have both reduced ignition and satisfactory free combustion quality.

The smoking article may have a circular or near-circular cross section, meaning that any side or side portion of the smoking article may be placed in contact with the substrate, such as when the smoking article falls on a surface or is left unattended. In this regard, the pattern described herein forms a side or side portion having a film forming mixture that is not in contact with the substrate, regardless of the direction when it is in contact with the substrate. Smoking articles may have a cross section that is not circular.

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

Many objects and advantages of the invention will be apparent to those of ordinary skill in the art upon reading the accompanying drawings, in which like reference numerals are applied to 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 unpackaged portion of the wrapper used in the manufacture of the smoking article of FIG. 1.

3 is an enlarged plan view of a wrapper for smoking article illustrating a second quadrilateral pattern;

4 is an enlarged plan view of a wrapper for 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 wrapper for smoking article illustrating a triangular pattern;

FIG. 7 is a side view of the smoking article using the wrapping paper of FIG. 3, with the smoking article on the substrate and the first side portion of the smoking article contacting the substrate; FIG.

8 is a side view of the smoking article using the wrapping paper of FIG. 3, with the smoking article on the substrate and the second side portion of the smoking article contacting the substrate;

9 is a side view of the smoking article using the wrapping paper of FIG. 3, with the smoking article on the substrate and the third side portion of the smoking article contacting the substrate;

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

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

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

FIG. 13 shows an enlarged short-lived view of a smoking article placed over a substrate and showing air flowing in a smoky coal.

FIG. 14 shows an enlarged short-lived view of the smoking article removed from above the substrate and showing air flowing into the smoky coal.

According to the invention, the first embodiment of the smoking article 20 (see FIG. 1) is provided with a tobacco rod 22. The tobacco rod 22 may be provided with a cut filler of tobacco and wrapped with a wrapper 24. One end of the smoking article 20 may have a suitable filter 26 wrapped with a suitable filter tipping paper 27. The smoking article 20 may typically have a generally circular cross section throughout the smoking article. Nevertheless, other cross-sectional shapes, including for example elliptical, are within the scope of the present invention. The tobacco rod 22 has a nominal length L measured along the longitudinal axis A of the smoking article 20 from the rim of the tipping paper 27 to the free end of the tobacco rod 22. By way of example, the nominal length may 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. Coresta units measure longitudinal permeability in volume flow rate (ie, cm 3) per unit area (ie, cm 2) per unit pressure drop (ie cm in head). The base web of conventional wrappers is also measured in grams per square meter and has a basis weight well known as abbreviation "gsm". The permeability and basis weight for the base whip of typical smoking article wrappers commonly used in manufacturing are defined in the table below.

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

table

For the purposes of the present invention, the base web 24 of the preferred wrapper 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 typical baseweb having a basis weight of about 33 and about 46 Coresta and about 25 gsm. In one embodiment, the baseweb may have a permeability value greater than about 60 Coresta, or greater than 80 Coresta, or even higher.

With reference to FIG. 2, the wrapper further comprises an adjunct zone at locations spaced along the tobacco rod 22 of FIG. 1 (such as the facing zones 34d and 36d).

Each rectangular region (eg 34a and 36a-the latter not shown in FIG. 1) forms a circumferential region 31 (eg region 31a).

The "width" of the banded region 31a is measured from the front edge 7 (which is closest to the approaching nose) of the region 31a to the rear edge 9 (which is farthest from the approaching nose). Preferably, for example, the width of the area 31a is in the range of about 5.5 mm to about 12 mm, more preferably about 7 mm to about 10 mm, most preferably about 8 mm to 9 mm. Further, in each circumferential region, such as region 31a, the regions 34a, 36a are spaced circumferentially and disposed facing 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 circumferential direction (i.e. by cross measurement on the paperweb) in the range of about 5 mm to about 9 mm in cross measurement, more preferably in the range of about 6 mm to about 7 mm in cross measurement. Stretched.

Conventionally, in describing the dimensions of the various embodiments herein it should be noted that "width" extends in the longitudinal direction of the tobacco rod, and the circumferential dimension is expressed as "crossing" or "cross direction" or "cross measurement". do.

The portion 33 of the base web between the adjacent areas 31a and 31b and between the opposing zones in each zone (such as between the zone 31b and the opposing zones 34b and 36b) is preferably essentially a zone. (For example, further attention should be paid to the absence of additional material constituting sections 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, more preferably from about 6 mm to about 8 mm.

Preferably, each opposing zone 34, 36 of each zone 31 is offset to some extent (as indicated below) from the preceding row or zone and a sufficient number of zones 31 follow a given tobacco rod. When seated (depending on the choice of band area width and band area spacing) and the smoking article is placed on a substrate, each pair of zones 43 is substantially tobacco, such as the opposing pair of zones 34b and 36b of FIG. 1. When facing side by side with the rod 22, at least one position appears along the tobacco rod 22. Most likely, 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 occurs most closely, is hereinafter referred to as the "oriented snuffer region 101."

Because the smoking article 26 may be placed on a substrate differently from that shown in FIG. 1, and / or because the pattern of the area may be different, the oriented snuffer region 101 may have a different rotation of the tobacco rod 22. It should be understood that other locations along the tobacco rod 22 may be indicated with respect to the location. The pattern of zones and bandgaps 33 is selected such that one or more oriented snuffer regions 101 are located along the tobacco rod 22.

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

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

Here, self-extinguishing is related to the smoking characteristics of smoking articles under free combustion conditions. To assess self-extinguishing, laboratory tests are conducted at a temperature of 23 ° C ± 3 ° C and a relative humidity of 55% ± 5%, all of which must be monitored by recording a thermohygrometer. The exhaust hood removes the combustion products formed during the experiment. Prior to the experiment, the smoking article to be tested was adjusted to a relative humidity of 55% ± 5% and a temperature of 23 ° C. ± 3 ° C. for 24 hours. Just before the experiment, the smoking article is placed in a glass beaker to ensure free air access.

Self-extinguishing experiments are carried out in an enclosure or in a test box. A single port smoking machine or electric lighter is used to ignite the experimental smoking article. During the experiment, the instrument or "angle holder" allows the article to be tested by holding the smoking article at 0 degrees (horizontal), 45 degrees, and / or 90 degrees (vertical). Twenty smoking articles were tested at the 0 degree, 45 degree, and 90 degree positions, respectively. If more than one appliance is used, the instruments are preferably arranged so that they do not face each other to prevent the smoking articles from interfering with each other. If the smoking article is turned off before the front line where the smoky kool reaches the tipping paper, the result is recorded as "self-digestion", while the smoking article continues to smoke up to the front line where the smoky kool reaches the tipping paper. If so, the result will be recorded as "not self-extinguishing". Thus, for example, a 95% self-extinguishing value indicates that 95% of the tested smoking article is self-extinguishing under free combustion conditions, while a 20% self-extinguishing value indicates that 20% of the tested smoking article is self-extinguishing under free combustion conditions. .

The self-extinguishing value may be referred to as "self-extinguishing value at 0 degrees", "self-extinguishing value at 45 degrees", or "self-extinguishing value at 90 degrees", each of which represents the value of self-extinguishing at the specified experimental angle. See. In addition, the self-extinguishing value may be referred to as the "self-digesting average value", which refers to an average of three angular positions. In other words, it is an average of "self-extinguishing value at 0 degree", "self-extinguishing value at 45 degree" and "self-extinguishing value at 90 degree". Do not distinguish between "self-extinguishing value" or "self-extinguishing value at 0 degree", "self-extinguishing value at 45 degree", or "self-extinguishing value at 90 degree", or any one of the self-extinguishing average value Reference may be made.

As used herein, the phrase “self-extinguishing under free combustion conditions” or “self-extinguishing under free combustion conditions” relates to extinguishing a smoking cigarette without breath when such cigarettes are subject to or exposed to free combustion conditions. .

As currently understood, the staggered zones of further material according to the present invention are designed with a beneficial combination of low ignition values and low self-extinguishing values for the smoking article 20 (see FIG. 1). The pattern of the low permeability zone of the additional material provides a region of the film forming mixture along the length of the ramp rod 22 and, when the tobacco rod 22 is positioned over the substrate, turns on the smoking article 20 that is turned on in cooperation with the substrate. Fire extinguishing and areas of additional material (such as film forming mixtures) cause the smoking article 20 to self-extinguish statistically rarely when held by a smoker in free combustion conditions. The smoking article 20 can thus exhibit a reduced ignition tendency while maintaining a satisfactory free combustion quality or low self-extinguishing value by attaching the pattern 30 of the film forming mixture to the base web according to the present invention.

In order to achieve the desired ignition and self-extinguishing properties of the smoking article, a pattern 30 (see FIG. 2) is attached to the base web 24 of the wrapping paper, preferably the base web 24 as shown in FIG. 2. It is either unfolded or has a wrapping paper into which the base web will split into bobbins. It is an object of the present invention to have a wrapper which, when formed into the tobacco rod 22, exhibits an IP value of less than 25 and a self extinguishing value of less than 50. 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. Smaller self-extinguishing values are also desirable. In this regard, more preferred self-extinguishing values are less than about 25 and at the same time the most preferred self-extinguishing values are less than about 10.

With particular reference to FIG. 2, the transversal dimension of the wrapping paper 24 is selected based on the diameter of the finished smoking article (about 7 mm to about 10 mm) and allows for overlapping material at longitudinal seams of about 1 mm to 2 mm. For example, if a 1 mm overlapping material is allowed, the wrapping paper crossweb 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 broken lines in FIG. 2) are formed by the tobacco rod 22 (arrow B in FIG. 2). In the spaced apart position. The additional material may be attached to one or both sides of the base web. Preferably, three to six, 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, 31d is measured along the tobacco rod 22 from the beginning of one region to the beginning of an adjacent region, less than the nominal length of the tobacco rod 22. Along the length). By selecting the longitudinal pitch length at about 25% of the nominal length, four regions will be provided in each tobacco rod 22.

In each circumferential region, for example (31a), at least two additional materials, for example (34a, 36a), are provided. Addition zones in all drawings are matched by moving them to match. However, within such smoking articles or wrappers for smoking articles, these adjunct areas may or may not be visually identified. Each zone is preferably spaced circumferentially such that the zones will face each other in the finished tobacco rod 22. Further, for the three zones, for example, 31a, 31b, 31c, the zones 34b, 36b of the third zone 31b are preferably circumferentially offset from the zones 34a, 36a of the first zone. . Moreover, the zones 34c and 36c of the third zone are preferably circumferentially offset from the zones 34b and 36b of the second zone 31b and also circumferentially from the zones 34a and 36a of the first zone. Is offset in the direction.

As shown in Fig. 2, in the present invention, the additional zones of each zone are laterally offset in the circumferential direction from the further zones of the adjacent zone by the distance, which is the transversal dimension of the additional zones. Each zone has 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. As shown in Fig. 2, the longitudinal pitch length may be greater than the width of the corresponding zone of the corresponding zone. The further zones of the zone continuing along the tobacco rod 22 are preferably offset from the further zone of the adjacent zone. Therefore, the pattern 30 of the area covering a part of the base web is formed along the inclined line with respect to the edge of the base web. In addition, the pattern of additional zones may be repeated at least partially along the length of the baseweb.

In the illustrated embodiment (FIG. 2), each zone is placed on a wrapper 24 so that the zone is centered in one of the three passages 34, 36, 38, with the corresponding broken line 34. , 36, 38). Thus, for example, passage 34 passes through the corresponding geometry of six zones 34a, 34b, 34c, 34d, 34e, 34f. Each zone is spaced apart from the other zones, but the zones are selectable and may contact each other. The passages 34, 36, 38 are parallel to each other and form an acute angle φ with respect to the lateral edge of the wrapper 24. Zone 36 ′ is preferably the same as zone 36 and protrudes through the pattern shown in FIG. 2, zone 35 ends along one rim, and zone 34 ′ has an opposite rim. To begin. For example, each pair of crossweb alignment zones, such as zones 34a and 36a or zones 36a and 36b, may cover up to about 33% of the total surface area of the corresponding zones 31a and 31b. In the rectangular zone, each zone is preferably a length or width in the range of about 8 mm to about 10 mm and has a cross measuring direction for the circumference in the range of about 5 mm to about 7 mm. The longitudinal spacing 33 between the 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 is preferably in the range of about 3 mm to about 20 mm, more preferably in the range of about 5 mm to 8 mm, most preferably in the range of 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 adjunct zones in any longitudinal position are preferably about 180 degrees apart from each other. Further, the ratio of the area occupied by the adjunct area to the total area (the total area is (i) the area 31d and (ii) is the sum of the circular areas between adjacent areas on one side (where this ratio is the "zone area) 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, and more preferably in the range of about 20% or less to about 35% or less. More specifically, in some embodiments the zone area ratio of zone occupancy to the overall area may be less than about 30% and even less than 25%. Generally speaking, high values (ie close to 1) are believed to increase carbon monoxide concentration in mainstream smoke where low permeability (i.e. low Coresta) wrappers are used on tobacco rods, thus keeping the area coverage ratio low. It is desirable to.

When the wrapper 24 is formed to make the tobacco rod 22, the passages 34, 36, 36 ′ are the first spiral passage 36/36 ′ (areas 36, 36 ′ in FIG. 2). Coupled to form 36/36 ') and a second helical passageway 34 (with spirally aligned zones 34), as illustrated in FIGS. A) The periphery extends long beyond the length of the tobacco rod 22. The spiral passages 36/36 ', 34 (shown in FIG. 2) have a helix angle φ and do not cross each other. Preferably, both helical passageways may follow one of the counterclockwise and clockwise directions with respect to the tobacco rod 22. As illustrated, when viewed from the lit end toward the filter end, both passages 34, 36 ′ follow the clockwise passage and begin at the filter end of the tobacco rod 22.

The zone of pattern 30 may be formed by attaching one or more aqueous film forming mixtures to the baseweb of the wrapper to reduce the permeability of the wrapper in this zone. Optionally, cellulosic material may be used to form the zone. Where film forming mixtures are used the film forming mixtures may preferably comprise water and occluding agents, for example from about 20% to 50% by weight. The film forming mixture may comprise one or more occlusive agents such as starch, alginate, cellulose or gum, and may comprise calcium carbonate as a filter. Starch is a film forming mixture, with a concentration of about 24% being advantageous. The film forming mixture may be applied to the baseweb of the wrapper 24 using gravure printing, digital printing, coating or spraying using a template, or other suitable technique. For example, the method of applying the film forming mixture and the film forming mixture described in US patent application Ser. No. 11 / 500,918 is incorporated herein by reference in its entirety and may be selected to attach a pattern to the baseweb of the wrapper. . If desired, the adjunct zone may be formed by printing multiple successive layers, for example two or more successive layers aligned or aligned with one another. Also, when layers are used to form adjunct zones, the materials in the layers may be the same or different. For example, one layer may be starch while the other layer may be starch and calcium carbonate (or vice versa).

A preferred embodiment of a pattern 30 of adjunct zones is illustrated in FIG. 3. As with the embodiment of FIG. 2, the adjunct zone of FIG. 3 is quadrilateral, in particular generally rectangular. Preferably, for example, at least two adjunct zones 40a, 40b are attached to respective zones 31a, 31b, 31c, 31d and spaced circumferentially in the finished smoking article. The circumferential dimension of each zone 40a, 40b is preferably chosen to be less than about 50% of the cross measurement of the base web 24 when not packed, and most preferably the base web of the tobacco rod 22. 24) or about 25% of the cross measurement of the circumference. The circumferential dimension of each zone 40a, 40b when preferably disposed at the circumferential spacing between zones 40a, 40b is preferably about 50% of the circumferential cross measurement of the base web 24.

The sum of the lengths 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 selected so that three or four Three zones 31a, 31b, 31c, 31d are located within the nominal length of the tobacco rod 22 of the smoking article, and further zones of adjacent areas are longitudinally spaced from each other. Preferably, for example, the longitudinal extension or “width” of the zones 40a, 40b (ie the zone width or zone width as defined above) ranges from about 8 mm to about 10 mm. The circumferential offset (x) between (42) zones 42a and 42b of zone 31b and (ii) zones 40a and 40b of zone 31a is preferably from about 10% to about 35% of the total. Cross-measure the base web 24 which is in range and not wrapped. More preferably, the circumferential offset x ranges from about 12% to about 35% of the total, and cross measures the unwrapped baseweb 24. Most preferably, the circumferential offset x is about half of the cross measurement of the circumferential dimension or additional zones 40a, 40b. The adjunct zones of the other zones 31c and 31d are likewise further offset in the circumferential direction by the same offset x with respect to each other. For example, it should be noted that the adjunct areas 46a, 46c in the area 31d are divided between the two edges of the base web 24 when the base web is in an unwrapped state.

The pattern applied to the regions 31a-31d is preferably repeated along the length of the base web 24. Clearly, if the circumferential offset x is less than 12,5% of the crosswise width of the base web, four or more regions will form a complete cycle or phase length for the pattern 30. Conversely, if the circumferential offset x is greater than 12.5%, up to four regions will form a complete cycle or phase length for the pattern 30 (as in the case of the FIG. 2 pattern).

Another embodiment of pattern 30 (see FIG. 4) uses quadrilateral adjunct regions 60a, 60b, ie, substantially parallelogram regions. When the wrapper is formed into the tobacco rod 22, the zones 60a, 60b are arranged to helically align generally with each other, and the arrangement of the parallelograms 60, 62, 64, 66 can be selected as desired. For example, a symmetrical image of the shape (symmetrical in length) can be used even without the usual spiral marks. Likewise, the distortion of the parallelogram zone can be changed as desired. Generally, however, the circumferential dimension, circumferential spacing or offset, longitudinal dimension, longitudinal spacing or offset of the zones 60, 62, 64, 66 and the regions 31a-31d of this embodiment are described in other embodiments. Can be selected as shown.

Another embodiment of the pattern 30 (see FIG. 5) uses quadrilateral adjunct regions 70, 72, 74, 76, ie substantially trapezoidal. In other words, the trapezoidal zones 70a, 72a can generally be banded so that they are in general helical alignment with one another when the wrapper is joined 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 torsion of the trapezoidal zone, and the ratio of the trapezoidal zone can be selected as desired. Generally, however, the circumferential dimension, the circumferential spacing or offset, the longitudinal dimension, and the offset of the longitudinal spacing or zones 60, 62, 64, 66 and the regions 31a-31d are as described in other embodiments. Can be selected as well. The front edge 7 is preferably the longer of the two parallel edges of the zone 70.

Another embodiment of the pattern 30 (see FIG. 6) generally uses triangular adduct regions 80, 82, 84, 86. In general, the triangular adjunct regions 80a, 82b of the adjacent adjacent region 31b are manufactured and arranged to contact the corresponding general triangular regions 82a, 82b of the adjacent adjacent region 31b. If required for IP and SE characteristics, the general triangular zones 82a, 82b of the first region 31a may be longitudinally spaced from the triangular regions 82a, 82b of the adjacent region 31b. Depending on the properties required for the design of the smoking article, the burning triangle of the smoking article of the general triangular region meets the progressively increasing cross-direction dimension of the triangle vertices and the general triangular zone (i.e. from right to left in FIG. 6). Or the burning coal of the smoky smoking article meets the base of the triangular zone and suddenly increases in the low permeability zone (ie, from left to right in FIG. 6). The circumferential spacing of the triangular zones 80, 82, 84, 86 and the size of the triangular zone can be determined according to the preferred range set out in the scope other than the present invention. The triangular zone may also be an isosceles triangle, equilateral triangle, right triangle or any other desired triangle as depicted. In general, however, the circumferential dimension, circumferential spacing or offset, longitudinal dimension, longitudinal spacing or offset of zones 80, 82, 84, 86 and regions 31a-31d of this embodiment are described in other embodiments. Can be selected as shown. Preferably, the triangle of the zone 80 is directed so that the front rim 4 (closest to the approaching nose) is formed.

Another location of the smoking article 20 overlying the substrate 98 is an illustration of the cooperation that occurs between the low permeable adjunct zone and the substrate 98. One position (see FIG. 7) illustrates a side view of a smoking article 20 according to the present invention. Turning the smoking article at a 45 degree angle to the longitudinal direction (clockwise from the left end of FIG. 7) results in a height similar to that shown in FIG. 8. Similarly, turning the smoking article reversely at another 45 degree angle (clockwise from the left in FIG. 7) results in the height shown in FIG. 9. In each of FIGS. 7 to 9, at least one pair of adjunct zones is along the length of the tobacco rod 22, such as the zones 92, 92 ′ of FIG. 7, the zones 94, 94 ′ of FIG. 8, and FIG. 9. Are located on the side of the smoking article in sections 96 and 96 '. In this position where the adjunct zone is substantially located on the side of the smoking article 20 (FIG. 12), the zones 92, 92 ′ are upright or generally perpendicular to the surface of the substrate 98. The direction of the zones 92, 92 ′ is well illustrated in FIG. 12, and the facing zones 92, 92 ′ are located on the corresponding and opposite sides of the smoking article 20 when viewed in cross section and substantially tobacco. Located symmetrically with respect to the diameter of the rod 22, the diameter is substantially parallel to the surface of the substrate 98.

The direction of the adjunct zone in another longitudinal position along the smoking article 20 is shown in FIGS. 10 and 11. In FIG. 10 the adjunct zones 90, 90 ′ are positioned so that one zone 90 is in contact with the substrate 98. Zones 94 and 94 'of the smoking article 20 of FIG. 7 will also be positioned as shown in FIG. 10 when viewed from the right end of FIG. In FIG. 11, one zone 96 ′ contacts the substrate 98, while the other facing zone 96 is located on top of the smoking article 20. 7-9, at least a pair of adjunct zones are rotated between Figs. 10, 12, or 12, regardless of the angular position of the smoking article 20 having the pattern of the adjunct zones illustrated. It should be understood that the location is the same as the location. This position is referred to above as the oriented snuffer region 101.

When the smoking article 20 is in free combustion conditions (see FIG. 14), the zones 92, 92 ′ block air from flowing to the combusted kool of the tobacco rod 22 by their reduced permeability. On the other hand, the bottom 104 of the wrapping paper allows air to freely enter the side of the tobacco rod 22 to assist in the complete combustion of the nose. 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 prevents air from rising to the bottom of the tobacco rod 22. Zones 92, 92 ′ and substrate 98 cooperate to form very small areas 100, 102 through which air can be directed through the baseweb. More specifically, the vertical region 100 between the bottom of the region 92 and the substrate 98 and the vertical region 102 between the bottom of the region 92 'and the substrate 98 are air-laid 22. To reduce the area that can pass through to reach the smoky nose. When the combustion line reaches the adjunct zone located as shown in Fig. 13, the fumes that are smoked due to lack of oxygen in the air self-extinguish. The substantially reduced area for air assisting combustion of the coal is located at the rotational position of the tobacco rod 22 between the position illustrated in FIG. 10 and the position illustrated in FIG. 12, with the adjunct zone being the substrate 98. When not in contact, FIG. 12 shows the location where it is most reduced in the area accessible to airflow. Likewise, if the smoking article is in the position shown in FIG. 13 where any other pair of adjunct zones is substantially in place, and the substrate 98 is placed in this position, self-extinguishing may occur as in other pairs of zones. easy.

However, substantially as shown in FIG. 11, when the smoking article is placed on the substrate 98 so that one adjunct zone is in contact with the substrate 98, the additional zone may pass through the air destined for the base web. The area can be sufficiently limited, and the degree of material cooperation between the substrate 98 and the additional area to reduce that area is smaller compared to what happens to the snuffer area 101.

In the preceding example, the reduction of the ignition value, the reduction of the self-extinguishing value, and the improved free combustion quality of the smoking article 20 with the wrapping paper on which the pattern 30 was formed, resulted in the substrate 98 being cut in three special directions. ), And the direction is offset 45 degrees from each other. Naturally, this explanation has been made this way for brevity. Regardless of which side portion the pattern according to the invention lies on the substrate 98, and to the extent that the desired free combustion quality of the smoking article is lost, the smoking article can be self-extinguished without the need to apply a film forming mixture to the wrapper. It should be understood that it can. This can be understood by recognizing that the opposite areas of the film forming mixture need not appear at a position that is exactly 90 degrees from the side contacting the substrate 98. This zone may be centered at a location that is near or far from the side portion in contact with the substrate 98, for example, between about 60 and 120 degrees from the side portion in contact with the substrate 98.

In addition, in a specially selected pattern, the ability to self-extinguish the smoking article depends on having a minimum length range of adducts (eg, film forming mixtures) rather than having a film-forming mixture of weight per area defined in the longitudinal position. For example, the length of the rectangular zone is about 5.5 mm for use in special designs, basewebs, and film forming mixtures. The amount of film forming mixture used can generally be increased without losing free combustion quality, in order to improve the fire performance, and if necessary, a combustion accelerator can be attached to the wrapper to assist even higher levels.

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

In the past, since there was an insufficient decrease in the permeability of the wrapping paper in the longitudinal direction, the 3: 1 ratio of permeability between the base web and the adduct zone was insufficient to extinguish the smoking article. However, beyond the circumferential portion of the smoking article, its permeability ratio is 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, the permeability ratio indicates the smoking article. May be sufficient to digest.

Thus, the helically rotated position of the adjoining adjunct zone does not contact the substrate 98, irrespective of which side portion of the wrapper lies with respect to the substrate 98, and the combustion line is in its longitudinal position. It is realized that the zone and the substrate 98 can cooperate to self extinguish the smoking article upon reaching, and that at least one longitudinal position with the film forming mixture at the side is always located. This fact results in improved ignition performance of the smoking article and allows the smoking article to be designed with a ignition value of 25% or less. Nevertheless, without the substrate 98, the smoking article does not self-extinguish and maintain free combustion, such as when heard by a smoker. This fact results in improved self-extinguishing performance of the smoking article and allows the smoking article to be designed with a ignition value of 50% or less, which may be a self-extinguishing average value. At zero degrees, the self-extinguishing value can be much lower than the SE mean value and less than 25%.

In the embodiment described above, the smoking article generally has a circular cross section. It is therefore possible for any side of the smoking article to be placed in contact with the substrate 98. However, the pattern described here is based on the combustion characteristics described above with respect to FIGS. 13 and 14 (ignition values up to 25% and E values up to 50%) regardless of which side of the smoking article is placed in contact with 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 face of the film forming mixture faces the substrate 98 at one or more longitudinal positions along the tobacco rod 22 without contacting the substrate 98. Is selected to appear. Having one or more longitudinal positions with a film forming mixture in the lateral position may accommodate a position where the smoking article is placed on the substrate 98 after a combustion line that extinguishes the smoking article protrudes through a portion of the smoking article, or When the smoking article is placed on the substrate 98, it is desirable that the side of the adjunct zone is always relatively close to the combustion line.

If desired, the adjunct zone may have quadratic and other geometric shapes, including, for example, ellipses, other polygons, or the like.

In addition, the helical angle φ described above can be increased while maintaining the dimension of the zone as in the illustrated embodiment. This change may settle the pattern overlapping the zones (or at least close proximity to each other in the zones). Optionally, the stepped spiral pattern can 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 the zones of the same size as shown in FIG. And between passages 34, 36, 36 '(there are twelve instead of six patches along passage 34).

When the word "about" or "approximately" is used herein in reference to a numeric value, the intention is not only a numerical value but also a tolerance of ± 5% or a tolerance of the exact numerical value corresponding to and associated with the word "about" or the word "about". It includes.

It will be apparent to those skilled in the art that the present specification describes a novel, useful and elusive smoking article. It will also be apparent to those skilled in the art that many variations, modifications, substitutions, and equivalents are located for the various embodiments of the smoking article described in the detailed description above. It is therefore evident that all such changes, modifications, substitutions and equivalents are within the spirit and scope of the invention as defined by and included in the appended claims.

Claims (18)

A smoking article having a tobacco rod having a wrapping paper, the wrapping paper having a base web having a nominal permeability and an adjunct zone formed according to a pattern, The pattern has a plurality of circumferential regions at locations spaced along the tobacco rod, each of the regions having at least two adjunct regions having a permeability less than the nominal permeability, and at least two of the additions The water zones are situated substantially opposite each other, and at least for each of the first, second, and third zones in succession, the zones of each second zone are circumferentially offset from the zones of each first zone. The zone of the third zone is more circumferentially offset from the zone of each first zone than the zone of each second zone, The pattern is repeated enough along the tobacco rod so that when the tobacco rod is placed on the substrate and viewed from one end, at least one area is in a direction in which each zone is located along the side of the tobacco rod, A wrapper such that the zone is of sufficient size, shape, and additives such that the tobacco rod can self-extinguish in at least one zone in the direction when the tobacco rod is placed on a substrate in a smoked state; Smoking goods provided. The smoking article according to claim 1, wherein the pattern has an additional area, and the adjunct zone is more circumferentially offset from the zone of the first zone than the zone of the zone immediately preceding the additional zone. A smoking article having a tobacco rod with a ignition of less than about 25%, a self-extinguishing value of less than 50%, a nominal length, and a wrapping paper. A base web having a nominal permeability; And Wherein the tobacco rod has at least two adjunct zones extending along the nominal length of the tobacco rod, each having a permeability less than the nominal permeability, each adjunct zone having a plurality of regions substantially facing each other; And each of the regions is the plurality of regions that are laterally offset from an adjacent region. 4. The smoking article according to claim 3, wherein the ignition property is about 15% or less. The smoking article according to claim 3 or 4, wherein the adjunct zone is generally quadrilateral. 5. A smoking article according to claim 3 or 4, wherein the region has a longitudinal pitch length along the tobacco rod and the adjunct zone has a longitudinal width less than the longitudinal pitch length. 5. The smoking article according to claim 3 or 4, wherein the base web has a permeability of at least about 20 Coresta. The smoking article according to claim 3 or 4, wherein the additive is located on one side of the base web. The smoking article according to claim 3 or 4, wherein the additives are located at both sides of the base web. The smoking article according to claim 3 or 4, wherein the adjunct zone is attached by printing. The smoking article according to claim 3 or 4, wherein the adjunct zone is attached by printing in a continuous layer. 5. The smoking article according to claim 3 or 4, wherein each of the regions has at least two additional spaces circumferentially spaced around the tobacco rod. 13. The smoking article according to claim 12, wherein each additional zone comprises a layer of starch compound. 5. The smoking article according to claim 3 or 4, wherein each of said regions is laterally offset from an adjacent region by a distance according to the transversal dimension of the additional zone. 5. The smoking article according to claim 3 or 4, wherein each of the regions is laterally offset from an adjacent region to form a spiral arrangement along the base web of the adjunct zone. As a smoking article, A tobacco rod having a longitudinal axis and a length; Wrapping paper surrounding the tobacco rod; Equipped with The pattern of the film forming mixture is disposed on the wrapper and has a plurality of discrete shapes, each said shape extending only to a part of said length, The first and second discontinuous shapes at each of the plurality of longitudinal positions along the smoking article intersect a plane perpendicular to the longitudinal axis, the first shape being disposed only on the first side of the smoking article and the second shape smoking A smoking article having a wrapping paper disposed only on a second side facing the first side of the article. 17. The smoking article according to claim 16, wherein in each of the plurality of longitudinal positions the third side and the fourth side facing the third side are substantially free of film forming mixture, which are separating the first side from the second side. As a smoking article, A tobacco rod having a longitudinal axis; Wrapping paper surrounding the tobacco rod; Wherein the first and second patterns are disposed on the wrapper and have only a reduced permeable area for the wrapper, forming a spiral first and second passageway that do not overlap the entire length of the smoking article, In each of the plurality of longitudinal positions along the length of the smoking article a portion of the first pattern is located only on the first side of the smoking article and the portion of the second pattern is located only on a second side facing the first side of the smoking article, Smoking goods with wrapping paper.

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