KR20190078604A - Smoking products with liquid-filled capsules - Google Patents

Abstract

A smoking article comprising a rod element comprising a smoking article, a filter element having a first end for connection to an end of the rod element and an opposite second end for insertion into a user's mouth. A liquid-filled capsule is disposed between the first end and the second end of the filter element, and the liquid-filled capsule is configured to break upon application of an external force to release liquid. The tipping wrapper connects the filter element and the rod element. The tipping wrapper has a wet tensile strength of at least about 0.15 kN / m. The smoking article is resistant to cracking even after the liquid is released.

Description

Smoking products with liquid-filled capsules

The present invention relates to a smoking article comprising a filter element having a liquid-filled capsule. The characteristics of the smoke produced by the smoking article can be changed by breaking the capsule and releasing the liquid in the smoking article. The smoking article is configured to withstand cracking, even after wetting of the article due to the release of liquid from the capsule.

Smoking products such as cigarettes, cigarillos and the like generally have a generally cylindrical rod-shaped structure and are popular consumer goods, including fillers, rolls or columns of smokable materials, such as ground tobacco (for example in the form of cut pellets) , Which is surrounded by a paper wrapper forming a so-called "tobacco rod ". Cigarettes or cigarillos also typically have a cylindrical filter element arranged in relation to the tobacco rod and end-to-end connections. The filter element may comprise, for example, a cellulose acetate tow plug, which is circumscribed by a wrapper material known as a "plug wrap ". Typically, the filter element is attached to one end of the tobacco rod using a circumscribing wrapping material known as a "tipping wrapper ". The filter element wrapped by the tipping wrapper is known as a "mouthpiece element ".

In recent years, there has been an increase in consumer demand for smoking products that provide modified sensory attributes, particularly tobacco incorporating filter elements, which can serve as a means to impart flavor to the mainstream smoke of cigarettes. Specifically, these smoking articles contained flavor-changing substances in fragile pellets or capsules. During cigarette manufacture, the filter material is formed of a continuous filter rod having pellets or capsules located in its rod, for example along its longitudinal axis. The successive filter rods are then divided or cut at predetermined intervals to form a plurality of filter elements, each filter element comprising at least one capsule. The capsules are then broken manually by the consumer to release the material into the filter material, which serves to alter one or more characteristics of the mainstream smoke during smoking such as flavor, taste or TNCO levels (tar, nicotine, CO).

For this purpose, crackable capsules with shells made of gel and containing the substance to be released, for example, are used. Most recently, these breakable capsules have begun to focus on liquid release, especially water release. However, this can be problematic as the liquid to be discharged may include a filter wrapper and a tipping wrapper that couples the filter element to the tobacco rod, which tends to wet the filter element. As a result, when a force is applied, for example, when a user taps the mouthpiece element lightly to remove ashes from the burned end of the smoking article, the mouthpiece element is removed from the tobacco rod, Can be broken at the connection between the tobacco rod and the filter.

It is therefore an object of the present invention to provide a smoking article comprising a liquid-filled capsule capable of withstanding damage under application of an external force, even after wetting of the smoking article due to liquid release. In particular, it is desirable to provide a smoking article that alleviates the risk of desorption of the mouthpiece element when the consumer taps the mouthpiece to remove ashes from the tampered end of the smoking article.

According to one aspect of the present invention, there is provided a device comprising: a rod element comprising a smokable material (e.g., a tobacco rod); A filter element having a first end for connection to an end of the rod element and an opposite second end for insertion into a user's mouth; A liquid-filled capsule disposed between the first end and the second end of the filter element and configured to break upon application of an external force to release liquid contained therein; And a tipping wrapper connecting the filter element and the rod element, wherein the tipping wrapper has a wet tensile strength of at least about 0.15 kN / m.

The wet tensile strength of the tipping wrapper is selected to ensure that the smoking article can withstand the forces experienced during normal use without damaging the elements of the smoking article, even after release of the liquid from the capsule. In particular, by using a tipping wrapper having a wet tensile strength of 0.15 kN / m or greater, it has been found that smoking articles are robust to the forces associated with the use of smoking articles. For example, the product can be robust enough to withstand the repetitive forces associated with tapping the mouthpiece in order to remove ash during use. The wet tensile strength may be at least 0.25 kN / m, such as at least 0.20 kN / m, such as at least 0.30 kN / m, or at least 0.35 kN / m. The wet tensile strength may be 0.55 kN / m or less, for example, 0.45 kN / m or less, or 0.40 kN / m or less, such as 0.50 kN / m or less.

The tipping wrapper may have a dry tensile strength of at least 1.25 kN / m, such as at least 1.5 kN / m, such as at least 1 kN / m, such as at least 1.75 kN / m or at least 2 kN / have. By using a tipping wrapper having a dry tensile strength of at least 1 kN / m (i.e., prior to liquid discharge wetting), the tipping wrapper can be used during manufacture, especially during pulling force, Is able to withstand the pulling force for connecting the element to the rod element of the smoking article and is pulled from the reel at high speed and wrapped around the filter and the cigarette.

The tipping wrapper may have a dry tensile strength of less than 5 kN / m, for example less than 4 kN / m, such as less than 3 kN / m.

The tipping wrapper may have a dry tensile strength ratio to wet tensile strength of less than 15, such as less than 9 or less than 6, for example. The tipping wrapper may have a dry tensile strength ratio to a wet tensile strength of from 5 to 9, such as from 4 to 15, for example from 5 to 7. [

The wet tensile strength and dry tensile strength of the tipping wrapper are measured along the principal stress direction of the tipping wrapper corresponding to mutually orthogonal sets of axes in which the normal stress tensor is maximized. The wet tensile strength is measured according to ISO 3781: 1983 and the dry tensile strength is measured according to ISO 1924-2: 2008. The principal stress directions in the rolls of the tipping wrapper material, such as the paper rolls of the tipping wrapper (i.e., the rolls of the tipping paper) are machine direction (machine direction), cross direction (CD) direction and is shown in Fig. Both MD and CD directions are included in the plane of the tipping wrapper material; The MD direction is the direction in which the material is pulled from the roll, and the CD direction is parallel to the longitudinal axis of the roll and oriented in the winding direction of the roll. The ZD direction is perpendicular to the plane of the tipping wrapper material and thus orthogonal to the other two main directions. When a roll of tipping wrapper material is wound, the ZD direction is directed radially towards the longitudinal axis of the roll. Preferably, wet tensile strength and dry tensile strength measurements are performed along the MD direction.

The tipping wrapper is preferably wrapped around the filter element in a direction of principal stress substantially parallel to the longitudinal axis of the filter element. Since the MD direction generally has a higher tensile strength than the CD direction, preferably, the principal direction of stress is the CD direction, which facilitates fabrication at high speed, as described above.

The liquid-filled capsule may be an isotropic capsule configured to break upon application of a predetermined compressive force. The liquid-filled capsule may break to release the liquid uniformly or in one or more directions. The liquid-filled capsule may be a spherical capsule.

The liquid-filled capsule may be a directional capsule, and the directional capsule is a capsule containing a volume of liquid suitable for directing the liquid release to a specific desired direction or to a specific desired area. The directional capsule may be configured to break in a predetermined rupture region according to the application of an external force to substantially release the liquid from the rupture region. The use of a tipping wrapper having a wet tensile strength of 0.15 kN / m or greater is particularly important when a directional capsule is used because the discharged liquid is directed to a specific area of the product. By providing a relatively high tensile strength to the tipping wrapper in this region, the smoking article can have improved robustness against breakage.

The rupture region of the capsule can be arranged to emit liquid in the same axial direction as the longitudinal axis of the filter element.

Some breakable capsules may have isotropic resistance to cracking, which can make it difficult to determine the specific rupture location of the capsule, and thus the area of the filter element from which the contained material is released. When a liquid is discharged into a predetermined portion of the product as a directional capsule, it can be strengthened within a defined tipping wrapper, thereby alleviating the effects of damage. Certain directional capsules can jet a liquid through a jet, the force of which can be determined by the crushing force applied by the consumer. Thus, the liquid may be propelled from the directional capsule with a force sufficient to extend the wetting of the smoking article towards the tobacco end than may be typical of non-directional capsules. This increases the importance of providing a tipping wrapper having a relatively high wet tensile strength of greater than 0.15 kN / m.

The use of directional capsules also affects the location of the smoking article where the liquid is released, and can affect changes in smoke properties, such as flavor, provided by the liquid. Thus, control over the position at which the liquid is released may also be important to provide better control of the effect of the liquid on the inhaled smoke.

The rupture region may be directed towards the first end of the filter element. Thus, the liquid can be deposited adjacent the connecting end of the rod element. However, as described, this region may be particularly vulnerable through the absorption of the released liquid, and this may increase the likelihood of rod desorption. Using a tipping wrapper having a wet tensile strength greater than 0.15 kN / m in this region may help prevent the rod from being detached during normal use.

The rupture region may be directed towards the second end of the filter element. In this manner, the liquid can be directed away from the area of the most vulnerable product after wetting.

The filter element may further comprise a fibrous filter material between the capsule and the first end of the filter element. By providing a fibrous filter material upstream of the directional capsule, the effect of the released liquid on the properties of the mainstream smoke is extended in time. The fibrous filter material may be disposed immediately adjacent to the directional capsule, for example, immediately adjacent to the burst region of the directional capsule. By arranging the fibrous filter material immediately adjacent to the directional capsules, the progress of the liquid to the most vulnerable area of the smoking article, i.e., the area where the tipping wrapper alone covers the rod element of the smokable material (connection area) can be controlled . The fibrous filter material may extend at least 7 mm, for example 9 mm, between the directional capsule and the first end of the filter element. By providing this amount of fibrous filter material immediately upstream of the directional capsule, the liquid leakage is relieved and the effect of the released liquid on the properties of the mainstream smoke is extended in time.

In one configuration, the capsule may contain at least 0.05 ml volume of liquid. In another configuration, the capsule may contain at least 0.07 ml or at least 0.08 ml volume. The volume of this liquid can be significantly larger than known devices. The use of large volume capsules increases the problems that can be experienced in smoking products due to wetting. Thus, this provides additional advantages for the use of relatively high wet tensile strength tipping wrappers of greater than 0.15 kN / m.

In a preferred configuration, the liquid volume of the directional capsules may be up to 0.15 ml, for example up to 0.12 ml, or up to 0.10 ml. By providing this volume of liquid, the liquid leakage is further mitigated.

The tipping wrapper may comprise a fibrous material and a wet strength additive that acts to increase the bond between the fibers of the fibrous material. The additive may be added during manufacture, such as a curing process, and embedded in the fibers. Increased binding between the fibers can be facilitated by cross-linking molecules of the additive. By adding a wet strength additive to increase the bond between the fibers, the wet tensile strength of the tipping wrapper can be increased. In some configurations, the fibrous material may be paper, and the wet strength additive may be a polymer. The wet strength additive may be selected from natural resins, synthetic resins or a combination thereof.

The filter element may further comprise a filter wrapper at least partially extending between the first end and the second end of the filter element. The provision of such a filter wrapper can assist in retaining the liquid in the filter element, thus alleviating additional leaks and further prolonging the effect on the properties of the mainstream smoke. By providing such a filter wrapper, the weakest region of the smoking article after the liquid release is more localized at the connection between the rod element and the filter provided by the tipping wrapper, thus further strengthening the smoking article against the weakening effect of the discharged liquid .

The filter element may comprise at least two filter segments coupled by a filter wrapper. In this manner, the capsule can be provided in one such filter segment and the filtering material can be provided in one or more filter segments, which can simplify the manufacture of smoking articles.

BRIEF DESCRIPTION OF THE DRAWINGS Embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 shows the principal stress directions in the roll of tipping wrapper material;
Figure 2 is a side cross-sectional view of a filter element for use of a smoking article in an embodiment of the present invention;
Figure 3 is a side view of a smoking article in an embodiment of the present invention;
Figure 4 shows a filter and a tipping wrapper in an unwrapped form as an isometric view of a smoking article in an embodiment of the present invention.

3 is a schematic side view of a smoking article 10 in an embodiment of the present invention. The smoking article 10 comprises a rod element 11, which contains a smokable substance and is connected to a filter element 1. The filter element has a first end (2) for connection to the end (11) of the rod element and a second end (3) through which the smoke is drawn into the user's mouth. A liquid-filled capsule (7) is provided between the first end (2) and the second end (3) of the filter element (1). The liquid filling capsule 7 is configured to break upon application of a force F for discharging the liquid L. [ The rod element 11 and the filter element 1 are connected in a linearly aligned relationship with at least a tipping wrapper 12 extending beyond the connected ends. The tipping wrapper 12 has a wet tensile strength of at least 0.15 kN / m, preferably at least 0.20 kN / m.

The tipping wrapper 12 may be made of a fibrous material, such as paper, containing a wet strength additive. The wet strength additive may be selected from natural polymers such as starch, carboxymethylcellulose (CMC), polyacrylamide (PAM), glyoxalated polyacrylamide (GPAM), or polyamide- And synthetic resins such as polyamide-epichlorohydrin (PAE). These resins generally act during the curing process of the paper, in which the functional groups on the polymer react with the cellulose fibers to form covalent bonds. The polymer molecules cross-link to form a network in the cellulose web, which provides strength when the paper is wet. Wet strength additives can also enhance existing fiber-to-fiber bonds, which further improves the strength of the paper. The wet strength additive may be applied in an amount sufficient to saturate the cellulose fibers.

The rod element 11 is a tobacco rod, and the smokable material comprises cigarettes. For example, the smokable material may be a cut filler cigarette. Cropped filler cigarettes may include tobacco of the type such as Virginia, Burley, Oriental and Semi Oriental. The tobacco cut filler may comprise, for example, a blend of two or more different types of tobacco, such as tobacco of the type mentioned above. Alternatively, the tobacco cut filler may comprise one of the cigarette types mentioned above. The tobacco cut filler may comprise, for example, air, sun or flue dried cigarettes. Alternatively or additionally, a tobacco cut filler can be treated, for example, to reduce tobacco-specific nitrosamines (TSNA). In addition to tobacco leaves, tobacco cut fillers include, for example, expanded tobacco, homogenized tobacco (e.g., recycled tobacco, cast tobacco or extruded tobacco), tobacco stalks (e.g. expanded or improved stalks), tobacco and other combinations typically found in tobacco excipients such as, for example, fines and any combination thereof. Flavors and casings comprising one or more humectants, flavors, sugars or combinations thereof may also be applied to the tobacco cut filler in a known manner.

The rod element 11 is substantially cylindrical and has a smokable material wrapped by the outer wrapper of the smokable cigarette paper. The filter element 1 is also cylindrical in shape with a cross section substantially coinciding with the cross section of the rod element 11. The filter element 1 contains filter plugs 4 and 6 which contain a filtering material for filtering the mainstream smoke when the mainstream smoke passes through the first end 2 and the second end 3. Examples of suitable filtration materials include cellulose acetate, paper, and combinations thereof. The filter element may comprise at least one filter segment consisting of a fibrous filter material and optionally a plurality of segments consisting of a fibrous filter material, typically a cellulose-based filter material, such as a cellulose acetate tow. .

The filter element 1 itself typically has a length in the range of about 5 mm to 40 mm, preferably in the range of about 15 mm to about 30 mm.

The liquid-filled capsule 7 is located in the filter element 1 between the first end 2 and the second end 3. The liquid- Capsule 7 comprises an outer shell containing a liquid L which may comprise one or more flavors. The shell of the capsule (7) is configured to break under a user application force (F) to release liquid (L). The shell may be made of an elastically deformable material such as a polymeric material. The liquid in the capsule may comprise an aqueous liquid containing dissolved or suspended material such as purified water or flavor material.

The capsule 7 can be deformed by force applied by the user's fingers to the outer surface of the filter in the radial direction facing inward as shown in Fig. 3, for example, by breaking the capsule 7, Lt; RTI ID = 0.0 > a < / RTI > The liquid-filled capsule 7 shown in Fig. 3 is a directional capsule 7 configured to discharge liquid in a predetermined direction, and will be described in more detail with reference to Fig.

In the presently described embodiment, the capsule 7 has a partially trapezoidal shape. In other embodiments, the capsule 7 may be elongated. Alternatively, the capsule 7 may be substantially spherical or egg-shaped. The capsule 7 can be a seamless shell. Alternatively, the capsule 7 can be an open-ended shell closed and sealed with a cap. The shell may have side or sidewalls extending from the end wall to the open end, thus defining or enclosing the cavity in the shell. The sidewall may be terminated to a rim at the open end to facilitate application of the cap. The side walls can be generally cylindrical or multi-sided. The side or side wall may taper or narrow from the open end toward the end wall. The cap is typically formed and cut from a section or wide face of a sheet material, such as a laminated plastic sheet material.

The liquid capsule 7 may contain at least 0.05 ml of liquid. By providing this volume of liquid, the amount of liquid that is released in one compression is sufficient to produce an effect on the characteristics of the mainstream smoke. This is a relatively high liquid volume compared to previously used liquid capsules. The breakage of the liquid capsule 7 causes a significant wetting in the smoking article 1, which can extend into the filter element 1 and also into a part of the rod element 11. The tipping wrapper 12 may also be wetted. In the presently described embodiment, the tipping wrapper 12 has a wet tensile strength of at least 0.15 kN / m. This characteristic of the tipping wrapper 12 has been found to provide sufficient robustness under normal use to prevent detachment of the rod element 11 from the filter element 1 even after the liquid L has been released.

The first, connecting end 2 of the filter element abuts the end of the rod element 11 and the connection is between the rod element 11 and the filter element 1 at least in the circumferential direction of the tipping wrapper 12 And is fixed through lapping. The tipping wrapper 12 extends beyond the connection in opposite axial directions and is attached to the outer surface of the rod element 11 and the filter element 1, for example by means of an adhesive. The length of the attached tipping wrapper 12 extending to either side of the connection can be changed to a larger extension that increases the connection strength between the filter 1 and the rod 11, Extending far will have an effect on the characteristics of the inhaled smoke.

Typically, the tipping wrapper 12 is generally rectangular and is cylindrically wrapped around at least a portion of the rod element 11 of the smoking article and at least a portion of the filter element 1, as can be seen in Fig. The tipping wrapper 12 is wrapped around at least a portion of the filter element 1 so that the tipping wrapper 12 physically and mechanically attaches the filter element 1 to the rod element 11 of the smokable material, Surrounds or surrounds at least a portion of the filter element to connect. In this manner, the tipping wrapper 12 will typically surround or wrap the filter element 1 and the adjacent end of the rod element 11 of the smokable material. Thus, the portion of the smoking element rod element 11 that is surrounded or wrapped by the tipping wrapper 12 typically has a length in the range of 1 mm to 16 mm, for example, 2 mm to 12 mm. As used herein, the term "length" refers to the axial or longitudinal dimension of the smoking article 10.

The tipping wrapper 12 may include a bonding area to which the adhesive is applied. That is, the tipping wrapper 12 is generally bonded to a region that overlaps itself when the tipping wrapper 12 is wrapped around the filter element 1 and at least a portion of the rod element 11 of the smokable material. The bonding area is preferably elongated and extends in the longitudinal direction of the smoking article 10, for example along the edge of the tipping wrapper 12.

As described, the tipping wrapper 12 has a wet tensile strength of at least 0.15 kN / m. In some embodiments, the tipping wrapper 12 has a wet tensile strength of at least 0.25 kN / m, e.g., about 0.35 kN / m. The tipping wrapper 12 has a wet tensile strength of less than about 0.55 kN / m.

The tipping wrapper 12 has a tensile strength of at least about 1.25 kN / m, such as at least about 1 kN / m, such as at least about 1.5 kN / m. The tipping wrapper 12 has a dry tensile strength of less than about 5 kN / m, for example less than or equal to 3 kN / m.

The tipping wrapper 12 has a dry tensile strength ratio to a wet tensile strength of no greater than 15, for example no greater than 12, no greater than 9, or most preferably no greater than 6. [ Tests have shown that a range of 5 to 7 relative to the dry tensile strength ratio to wet tensile strength can be obtained and provide a beneficial effect in maintaining the strength of the tipping wrapper when switched from dry to wet state.

In use, a force is exerted on the outer surface of the filter element 1 by the user in the direction indicated by the arrow F to break the capsule and release the liquid L. This force is generally provided by the opposite pressure of the user's finger in a direction perpendicular to the longitudinal axis of the smoking article 10, as indicated by arrow F. [ Under this pressure, the filter element 1 is deformed inwardly, creating a corresponding force on the capsule 7, so that the shell is deformed to an increasing withstanding pressure so that the rupture and the liquid L are discharged.

The liquid L is discharged from the capsule 7 and dispersed in the filtration materials 6 and 4. A portion of the released liquid L can also move toward the tipping wrapper 12 and reach the tipping wrapper 12 and be absorbed by the tipping wrapper. In the embodiment in which the filter element 1 is wrapped by the filter wrapper 8 (Fig. 4) when the filter element 1 generally comprises more than one segment, the tipping wrapper 12 is arranged in the filter wrapper 8 To the filter element 1 by applying an adhesive on the filter element 1. However, the application of the adhesive is generally only along a line parallel to the longitudinal axis of the filter element 1 and there is a gap between the filter wrapper 8 and the tipping wrapper 12, Once it has wetted the filter wrapper 8 and leaks into and through this area, it can quickly advance by capillary action. When liquid is discharged towards the first filter end 2 or to the tobacco end the liquid travels toward the tobacco rod 11 and the area of the tipping wrapper 12 which connects the tobacco rod 11 to the filter element 1 , Which is the weakest area of the smoking article 10.

The smoking article 10 is ignited at the opposite end of the tobacco rod 11 to the filter 1 and the final smoke is moved through the tobacco rod 11 and the filter element 1 to reach the second Passes through the dispersed liquid (L) which influences the characteristics of the mainstream smoke before being inhaled by the user at the end. In normal use, the user generally pats the mouthpiece (1) to remove the spent material. The wet tensile strength of the tipping wrapper 12 is such that the smoking article is removed from the filter 1 in the region connecting the tobacco rod 11 to the filter element 1 even when the liquid reaches the tipping wrapper 12 and is absorbed. Is selected to provide sufficient strength to resist damage that may occur, such as detachment of the substrate 11.

The liquid-filled capsule 7 is a directional capsule configured to release the liquid L in a predetermined direction through the provision of a known rupture area P. For example, the shell of the capsule 7 is configured to have a weak point or area P, where application of force F is preferentially given such that the contained liquid L is ejected from such a known point or area . Vulnerable areas may include one or more vulnerable lines. Alternatively, the fragile region may comprise one or more stress concentrator elements. A combination of fragile lines and stress concentrator elements would also be possible to form vulnerable areas.

The rupture region of the directional capsule 7 may be arranged such that the liquid L is discharged into an adjacent region of the filtration material in the axial direction same as the longitudinal axis of the filter element 1. [ The directional capsule 7 and the shell of the rupturing region P may be configured such that the user-applied force exhales or ejects the liquid L in a predetermined direction. The injection of the liquid L can increase the rate at which the liquid L reaches the tipping wrapper 12. [ The injection can increase the amount of liquid L reaching the localized area of the tipping wrapper 12, such as the tipping wrapper 12, particularly a single-stage filter connecting area. These factors increase the importance of the tipping wrapper 12 having a higher wet tensile strength, greater than 0.15 kN / m.

In the embodiment now described, the rupture area P of the directional capsule 7 first faces the connecting end 2 of the filter element 1. In this way, the discharged liquid L is dispersed adjacent to the first end 2 of the filter element 1. Provided by the defined tipping wrapper 12, despite the fact that this area of the smoking article 10, adjacent to the connecting point of the rod element 11 and the filter element 1, is known as a weak point (especially after wetting) Strengthening alleviates the risk of snapping. Thus, desired effects on the characteristics of the mainstream smoke are obtained without the risk of increased damage to the smoking article 10.

The distance D between the rupture area of the capsule 7 and the first end of the filter element 1 can also be adjusted so that the liquid L to be ejected is located at the optimum position. The test showed that a distance of at least 7 mm, preferably at least 9 mm, provided optimum dispersion of the liquid L without leaving the discharged liquid too far into the tobacco rod 11.

The filter element 1 may further comprise a plurality of filter segments arranged in series along the longitudinal axis of the filter element 1. In the example of Figures 2 and 3, the filter element 1 comprises three filter segments 4, 5, 6. The directional capsule 7 is provided in the central filter segment 5 with a filter segment containing a filter plug located on the upstream side 6 and the downstream side 4. The filter segments are connected by a filter wrapper 8 (shown in FIG. 4), which is wrapped around the filter segments 4, 5, 6 to secure the filter segments together.

In some embodiments, the one or more filter segments may be individually wrapped, or some or all of the filter segments may be joined by a combiner filter wrapper 8.

In some embodiments, at least one filter segment may contain a particulate material such as an absorbent or flavoring agent. The particulate material may be embedded in a fibrous filter material or contained in a cavity. The particulate material is located between the first end 2 of the filter element 1 and the rupture region P of the directional capsule 7 or between the second end 3 of the filter element 3 and the directional capsule 7 . The choice will depend on the desired effect on the properties of the mainstream smoke through the filter element (1).

In other embodiments, the filter element 1 comprises a single filter segment in which the liquid capsule 7 is disposed.

2 and 3, although the directional capsule 7 is arranged such that the rupture area P is located closer to the first end 2 of the filter element 1, the alternative embodiments The directional capsule 7 is arranged in the filter element 1 with a tearing area P located closer to the second end 3 of the filter element 1 than to the first end 2 of the filter element 1 .

In the illustrated embodiment, the filter element 1 is provided with one capsule 7, but in alternative embodiments the filter element 1 may be provided with, for example, one or more directional capsules 7 and one or more non- And more than one capsule 7 as in (7). When one or more directional capsules 7 are provided, all the directional capsules 7 can be oriented in the same direction; Alternatively, the one or more directional capsules may be arranged at the ends 2 for connecting to the rod element 11 of the smokable material, that is to say their respective rupture points P (e.g., toward the first end 2 of the filter element 1) And the one or more capsules 7 are arranged in a direction parallel to the direction of insertion of the respective ends of the respective rupture regions P for insertion into the mouth of the user, i.e. their respective rupture regions P towards the second end 3 of the filter element 1, In a second direction).

The embodiments described above refer to a directional capsule 7. In other embodiments, non-directional capsules may be used. The capsule may be, for example, an isotropic capsule such as a conventional spherical capsule.

4 shows a preferred way of connecting the tobacco rod 11 to the filter element 1 with a tipping wrapper 12. Fig. The tipping wrapper 12 is pulled in the MD (machine direction) direction from the reels of the tipping wrapper material (FIG. 1), and the CD cross direction of the tipping wrapper material is substantially parallel to the longitudinal axis of the filter element 1 The filter element 1 is wrapped around it. As a result, the tipping wrapper 12 is wrapped around the filter element 1 and the tobacco rod 11 such that the CD direction is substantially parallel to the longitudinal axis of the filter element 1.

Alternatively, the tipping wrapper 12 can be wrapped around the filter element 1 such that the MD direction of the tipping wrapper material is substantially parallel to the longitudinal axis of the filter element 1. [ As a result, the tipping wrapper 12 is wrapped around the filter element 1 and the tobacco rod 11 such that the MD direction is substantially parallel to the longitudinal axis of the filter element 1.

Claims (15)

As a smoking product,
A rod element comprising a smokable material;
A filter element having a first end for connection to an end of the rod element and an opposite second end for insertion into a user's mouth;
A liquid-filled capsule disposed between the first end and the second end of the filter element and configured to break upon application of an external force to release liquid contained therein; And
And a tipping wrapper connecting the filter element and the rod element and having a wet tensile strength of at least 0.15 kN / m. The method according to claim 1,
Wherein the tipping wrapper has a dry tensile strength of at least 1 kN / m. 3. The method according to claim 1 or 2,
Wherein the tipping wrapper has a key tensile strength not greater than 5 kN / m. 4. The method according to any one of claims 1 to 3,
Wherein the tipping wrapper has a wet tensile strength not greater than 0.55 kN / m. 5. The method according to any one of claims 2 to 4,
Wherein the ratio of the dry tensile strength to the wet tensile strength is not greater than 15. 6. The method according to any one of claims 1 to 5,
Wherein the tipping wrapper is wrapped about the filter element such that the principal direction of the tipping wrapper is substantially parallel to the longitudinal axis of the filter element. The method according to claim 6,
Wherein the primary direction of stress is a cross direction. 8. The method according to any one of claims 1 to 7,
Wherein the liquid-filled capsule is a directional capsule.
Directional capsules. 9. The method of claim 8,
Wherein the directional capsule comprises a predefined rupture zone configured to break upon application of an external force, the rupture zone facing the first end of the filter element. 9. The method of claim 8,
Wherein the directional capsule comprises a predefined rupture zone configured to break upon application of an external force, the rupture zone facing a second end of the filter element. 11. The method according to any one of claims 1 to 10,
Wherein the filter element further comprises a fibrous filter material between the first end of the filter element and the capsule. 13. The method of claim 12,
Wherein the fibrous filter material extends at least 7 mm between the first end of the filter element and the capsule. 13. The method according to any one of claims 1 to 12,
Wherein the capsule contains at least 0.05 ml of liquid. 14. The method according to any one of claims 1 to 13,
The tipping wrapper comprises:
Fibrous material; And
A wet strength additive that acts to increase the bond between the fibers of the fibrous material. 15. The method of claim 14,
Wherein the fibrous material is paper and the wet strength additive is selected from natural resins, synthetic resins or combinations thereof.

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