KR102219760B1 - A filter for a smoking article - Google Patents

Abstract

A filter for smoking articles has a first filter section comprising a filter material and a smoke modifying additive disposed in an axial region of the filter material, and a second filter section connected to the first filter section and having at least one channel, the channel being It is located within the axial region of the second filter section to direct smoke through the axial region of the first filter section during use. The smoke modifying additive can include a flavoring agent such as menthol and the second filter section can comprise a tubular section of fibrous filter material. An absorption filter section can also be provided.

Description

Filter for smoking articles {A FILTER FOR A SMOKING ARTICLE}

The present invention relates to a filter for smoking articles and a smoking article comprising the filter.

Known smoking article filters, such as cigarette filters, generally comprise a continuous tow of filamentary cellulose acetate. The cellulose acetate is collected to form a rod that is cut to form individual filter sections. The smoking article filter may be made of one segment of the filter rod or may be made of multiple segments with or without cavities or spaces between the segments.
WO 2008/074977 A1 (2008.06.26) describes a filter comprising a compartment having a hollow portion.

According to embodiments of the present invention, a first filter section and a second filter connected to the first filter section comprising a filter material and a smoke modifying additive disposed in the axial region of the filter material. A filter for a smoking article is provided comprising a section, the second filter section being a filter material for directing smoke through an axial region of the first filter section in which the filter material and a smoke modifying additive therein are disposed therein. And one or more channels positioned in the axial direction of. The first and second filter sections can be separate filter sections and/or the smoke modifying additive can only be disposed in the axial direction of the filter material of the first filter section or non-axial of the filter material of the first filter section. It may be disposed at a greater concentration in the axial region than in the directional regions.

The one or more channels may have a lower resistance to smoke passing through the one or more channels than other regions of the filter material of the first filter section. The channel may be a hollow passage through the second filter section.

A second filter section can be connected to the first filter section so as to form a second filter section immediately downstream or upstream of the first filter section when incorporated into a smoking article.

The axial region of the filter material of the first and/or second filter sections may have a radius of 1 mm to 4 mm and/or may be centered on the axis of the smoking article.

The first filter section may comprise a continuous filter material in which a smoke modifying additive is disposed in its axial region. The second filter section may comprise a tubular filter section. The tubular filter section can be formed from a fiber filter material.

The smoke modifying additive may be disposed in a greater concentration in the axial region than in the non-axial regions of the filter material of the first filter section.

The smoke modifying additive can only be disposed in the axial region of the filter material of the first filter section.

The second filter section may be configured to direct a greater portion of smoke through the axial region of the first filter section than through non-axial regions of the first filter section during use.

The smoke modifying additive may include an encapsulated additive. The smoke modifying additive may be contained in a capsule located in the first filter compartment, which is a position other than the longitudinal center position in the first filter compartment.

The capsule may be located in the first filter compartment which is a position of 1 mm to 10 mm from the longitudinal center position in the first filter compartment.

The smoke modifying additive may be disposed on a carrier material. The carrier material may include a thread.

The filter may further comprise a third filter section and the third filter section is connected to the first filter section such that a third filter section is formed upstream of the first filter section when incorporated into a smoking article. The third filter section may be a separate filter section. The third filter section may comprise a fibrous filter material and a granular adsorbent material. The granular adsorbent material may be disposed in the circumferential region of the third filter compartment, dispersed within the filter material of the third filter compartment, or disposed within the circumferential region of the third filter compartment. It contains several granular adsorbent materials dispersed within the compartment.

According to embodiments of the present invention, there is also provided a smoking article comprising a filter as defined above.

A second filter section can be arranged immediately downstream of the first filter section and at the mouth-end of the smoking article.

According to embodiments of the present invention, a smoking article comprising a first compartment comprising an aerosol-generating material and an aerosol-modifying additive disposed in an axial region of the aerosol-generating material, and a second compartment comprising a filter Further provided, wherein the channel has one or more channels positioned in the axial region of the filter for directing the aerosol produced by the aerosol-generating material during use through the axial region of the first compartment.

The second compartment may comprise a tubular filter compartment. The tubular filter section may be formed from a fiber filter material.

The aerosol modifying additive may be disposed in a greater concentration in the axial region than in the non-axial regions of the aerosol generating material of the first compartment.

The second compartment may direct a greater portion of smoke through the axial region of the first compartment than through non-axial regions of the first compartment during use.

Embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings.
1 is a schematic illustration of a smoking article having a filter having a tubular downstream filter compartment and an upstream filter compartment comprising an encapsulated additive in the form of a frangible capsule;
2 is a schematic illustration of a smoking article having a filter with a tubular filter section and a filter section comprising a thread carrying additives;
3 is a schematic illustration of a smoking article having a filter with a tubular filter compartment and a filter compartment comprising encapsulated additives in the form of a plurality of burstable capsules;
FIG. 4 is a schematic illustration of a smoking article having a filter similar to the filter described with reference to FIG. 1 but also comprising an additional filter section having an adsorbent dispersed within the filter material;
5 is a schematic illustration of a smoking article having a filter similar to the filter described with reference to FIG. 2 but also comprising an additional filter section disposed within the circumferential region of the filter material and comprising an adsorbent dispersed within the filter material;
6 is a schematic illustration of a smoking article having an aerosol-generating compartment and a tubular filter compartment, the aerosol-generating compartment having an additive encapsulated in the form of a plurality of microcapsules disposed within the axial region of the aerosol-generating compartment;
7 is a schematic illustration of a smoking article having a filter having a tubular upstream filter section and a downstream filter section comprising encapsulated additives in the form of a burstable capsule.

As used herein, the term "smoking article" refers to cigarettes, tobacco derivatives, expanded tobacco, reconstituted tobacco or cigarette substitutes based on cigarettes, cigars and cigars. Smokeable products such as cigarillos and also heat-not-burn products and other nicotine delivery devices capable of generating an aerosol for delivery to a consumer. Such smoking articles may be provided with a filter for gaseous flow blown by the smoker.

Smoking articles such as cigarettes and formats of smoking articles are often named as follows along the way of cigarettes: "regular" (typically 68 to 75 mm, for example about 68 mm to about 72 mm) Range), “short” or “mini” (68 mm or less), “king-size” (typically 75 to 91 mm, for example about 79 mm to about 88 mm range), “long” or super-king” (typically 91 to 105 mm, eg, in the range of about 94 mm to about 101 mm), and “ultra-long” -long)" (typically in the range of about 110 mm to about 121 mm).

Smoking articles such as cigarettes and formats of smoking articles are also named according to the cigarette circumference as follows: "regular" (about 23-25 mm), "wide" (>25 mm), "Slim" (about 22 to 23 mm), "demi-slim" (about 19 to 22 mm), "super-slim" (about 16 to 19 mm), And “micro-slim” (less than about 16 mm). Thus, a cigarette in a king-size, super slim format would have a length of about 83 mm and a circumference of about 17 mm, for example. Cigarettes in a regular, king size format, ie with a circumference of 23 to 25 mm and an overall length of 75 to 91 mm are preferred by many consumers.

Each format with filters of different lengths can be manufactured and smaller filters are generally used in formats of smaller lengths and circumferences. Typically the filter length will be formed from 15 mm for short, regular formats to 30 mm for ultra-long super-slim formats. The tipping paper will have a longer length than the filter, for example 3 to 10 mm longer.

The smoking articles and filters described below can be made in any of the above formats. Smoking articles can be for example 70 to 100 mm in length and 14 to 25 mm in circumference.

The terms “upstream” and “downstream” as used herein are relative terms defined in terms of the direction of mainstream smoke (or other aerosol) blown through the smoking article during use.

FIG. 1 is a schematic illustration of a smoking article 1 that is generally cylindrical in shape and has a regular, king size format, ie in a length ranging from 75 to 91 mm and a circumference ranging from 23 to 25 mm. Smoking article (1) comprises a wrapping material (3) longitudinally connected to the filter (4) by a tipping material (5), a tobacco rod (2) wrapped in cigarette paper in this example, the tipping The material is placed over the filter 4 to connect the filter 4 to the tobacco rod 2 and partially over the packaging material 3. The filter 4 comprises a first section 6 at the end of the tobacco rod of the filter 4, the first section being the axial region of the filter material of the first section 6 in which the capsule 8 is arranged. It contains an absorbent material (7). The axial area is the area centered on the axis'a' of the smoking article 1, having a radius of about 3 mm in this example. In alternative embodiments, the radius of the axial region can be anywhere in the range of 1 mm to 4 mm, or 1 mm to 3 mm, or about 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm or 3.5 mm. have. The capsule 8, or other additive material, may be disposed only in the axial region of the first filter of the first filter section 6 or in an axial region than the non-axial region of the filter material of the first filter section 6 Can be placed in a larger concentration. The first compartment is wrapped with a first plug wrap 9.

The filter 4 is formed in a tubular shape at the mouth-end of the filter 4 and comprises a second compartment 10 comprising a fibrous filter material 11 having a channel 12 extending through the center of the filter material 11. ) More. The hollow or hollow channel 12 extending through the center of the filter material 11 may be between 1 mm and 6 mm in diameter, for example between 2 mm and 5 mm in diameter. The channel 12 extending through the center of the filter material 11 is, in this example, an empty, hollow passage. The channel extends through the axial region of the filter material of the second filter section 10 in some embodiments. The axial area of the second filter section 10 is the area centered on the axis'a' of the smoking article 1, having a radius of about 2.5 mm in this example. In alternative embodiments, the radius of the axial region can be anywhere in the range of 1 mm to 4 mm, or 1 mm to 3 mm, or about 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm or 3.5 mm. have. In this example, the tubular filter compartment is formed of cellulose acetate tow and wrapped with a second plug wrap 13. The wall thickness of the tubular filter is about 1.5 mm. In alternative embodiments, the wall thickness can be anywhere in the range of 1 m to 4 mm, or 1 mm to 3 mm, or about 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm or 3.5 mm. However, certain dimensions may be selected based on the density of the filter material forming the tube and the level of plasticiser applied to the material, resulting in a tube having the desired strength, porosity or other properties. The tubular filter section 10 can be manufactured using existing processes and machinery.

The first fragment 6 is a cellulose acetate fragment formed using continuous cellulose acetate fibers and a plasticizer. Although capsules of other shapes and sizes may be used, the capsule 8 is spherical and has a diameter of 3.5 mm and contains a fluid additive that modifies the properties of the main smoke flow through the smoking article 1. The capsule 8 can be manufactured using existing processes and machinery and inserted into the first filter section 6. In this example, other fluids and granular additives may be contained in the capsule 8, but the capsule 8 contains a menthol flavourant. The capsule may be ruptured by the consumer to release fluid additives into the absorbent filter material 11.

The axis of the smoking article 1 is denoted by'a' in Fig. 1, around which the tobacco rod 2 and the first and second filter sections 6, 10 are aligned.

In this example, the capsule 8 is located in the'axial region' of the first filter section 6, as defined above. The capsule 8 may be positioned such that the center of the capsule is closer to the axis'a' of the smoking article 1 than to the outer periphery of the smoking article 1. In this example, the capsule 8 is positioned substantially along the axis'a' at the center of the capsule. In this example, the capsule 8 is offset from the longitudinal center of the first filter section 6. The capsule 8 can be positioned, for example, in the first filter section 6 at a position of 1 mm to 10 mm from the longitudinal central position in the first filter section 6. The capsule 8 is located in a part of the first filter section 6 closer to the downstream end of the first filter section 6. The capsule 8 is thus closer to the second filter section 10 than to the tobacco rod 2. In particular, the distance'd' between the center of the capsule 8 and the downstream end of the first filter section 6 is less than half of the total longitudinal length of the first filter section 6. In some embodiments, the distance'd' is less than 40%, less than 30%, or less than 25% of the total longitudinal length of the first filter section 6. In this example, the distance'd' is approximately 30% of the total longitudinal length of the first filter section 6. In alternative embodiments, the capsule 8 can be positioned longitudinally in the first filter section 6 centrally or closer to the upstream end of the first filter section than to the downstream end.

The smoking article 1 is provided in this example with vent holes (not shown) penetrating the tipping material 5 and the first plug wrap 9, providing ventilation into the first filter section 6. If the vent holes are formed by on-line laser perforation, the vent holes are preferably located in a longitudinal position other than the position in which the capsule 8 is located, so as to avoid damage to the capsule 8 during manufacture. For example, in a smoking article with a first upstream filter section 6 of 20 mm long and a second downstream filter section 10 of 7 mm long, ventilation may be provided 20 mm from the mouth end, The capsule 8 is centrally located longitudinally in the first filter compartment and thus extends from 15.25 mm to 18.75 mm from the mouth end at 3.5 mm diameter.

In use, the tobacco rod 2 of the smoking article 1 is ignited by the consumer in a conventional manner and tobacco smoke is blown through the filter 4 from the burning coal of the tobacco rod 2. The channel 12 in the second filter section 10 has a lower resistance to the main smoke flow through the filter 4 than the surrounding tubular filter material 11, so that a greater proportion of the main smoke flow is the channel 12 ) Through. This in turn results in a greater flow of main smoke flow in the axial region around the axis'a' of the first filter section 6 in which the capsule 8 is located. If the consumer ruptures the capsule 8 before or during smoking of the smoking article 1, the smoke modifying additive contained in the capsule (menthol in this case) is brought to a greater concentration into the axial region of the first filter compartment 6. The discharged and increased flow of main smoke flow through this axial region is consequently directed to the second filter section 10. Accordingly, the increased flow of main smoke flow improves the delivery of the smoke modifying additive to the consumer and the smoking article 1 thus improves the delivery of the smoke modifying additive to the consumer compared to conventional smoking articles.

Since the capsule 8 is located closer to the second filter compartment 10 than to the tobacco rod 2 within a part of the first filter compartment 6, when released, the contents of the capsule 8 The effect of the increased flow of the main smoke flow is further enhanced. The use of the tubular second compartment 10 at the mouth end of the smoking article 1 is more smoking than would be possible if the first compartment 6 comprising the capsule 8 is at the mouth end of the smoking article 1. It makes it possible to position the capsule 8 closer to the mouth end of the article 1. This is because the tube separates the first compartment 6 from the consumer's mouth, which prevents the contents from the capsule 8 from contacting the consumer's mouth.

2 is a schematic illustration of a smoking article 21 having a filter according to a further embodiment of the invention. The features of the smoking article 21 are the same as the features of the smoking article 1 described with reference to FIG. 1 unless otherwise stated below. The smoking article 21 comprises a packaging material 23, in this example a tobacco rod 22 wrapped with cigarette paper, the tobacco rod being placed over the filter 24 and a tipping partially overlying the packaging material 23 It is connected longitudinally to the filter 24 by means of a material 25. The filter 24 comprises a first section 26 at the end of the tobacco rod of the filter 24 comprising absorbent material 27. In this case, rather than disposing the capsule 8 within the first filter compartment, the absorbent material 27 is an additive holding chamber 28 disposed in the adsorbent material in the axial region (not shown) of the first compartment 26. Wherein the axial region of the first filter section 26 is as defined in relation to the first filter section 6 of the smoking article 1 described above. The yarn may be formed of, for example, cellulose acetate fibers or cotton, and may be loaded with 0.1 to 10 mg of flavoring agent such as menthol flavoring agent. Flavor loading levels of 0.2 to 2 mg or 0.2 to 1 mg have been found to be effective. The first compartment 26 is wrapped with a first plug wrap 29. The yarn 28 holds an additive, in this case a menthol flavor, that can modify the main smoke flow through the filter 24.

The filter 24 comprises a fibrous filter material 31 formed in a tubular shape at the mouth end of the filter 24 and is similar to the second section 10 of the filter 4 of FIG. 1 described above. A second section 30 having a channel 32 extending through the center of) or through the axial region of the filter material. In this example, the tubular filter compartment is formed from cellulose acetate tow and wrapped with a second plug wrap (33).

The first fragment 26 is a cellulose acetate fragment formed using continuous cellulose acetate fibers and a plasticizer. The yarn 28 can be inserted into the filter material during formation of the filter section 26 using existing processes and machinery.

In use, the smoking article 21 illustrated in FIG. 2 operates in a manner similar to the smoking article 1 illustrated in FIG. 1. However, without breaking the capsule 8 to release the smoke modifying additive, the consumer can simply smoke the smoking article 21 in a conventional manner. In doing so, a larger flow of main smoke flow is passed through the axial region of the first filter section 26 in which the chamber 28 holding the smoke modifying additive is located and consequently to the second filter section 30. Is oriented. Thus, when a smoking article is smoked, the increased flow of the main smoke flow improves the delivery of the smoke modifying additive to the consumer and the smoking article 1 accordingly improves the delivery of the smoke modifying additive to the consumer over conventional smoking articles Can show

3 is a schematic illustration of a smoking article 41 having a filter according to a further embodiment of the invention. The features of the smoking article 41 are the same as the features of the smoking article 1 described with reference to FIG. 1 unless otherwise stated below. The smoking article 41 comprises a packaging material 43, in this example a tobacco rod 42 wrapped with cigarette paper, the tobacco rod being placed over the filter 44 and a tipping partially overlying the packaging material 43 It is connected longitudinally to the filter 44 by means of a material 45. The filter 44 comprises a first section 46 at the tobacco rod end of the filter 44 comprising absorbent material 47. In this case, the capsule 8 is not disposed in the first filter compartment, and the absorbent material 47 has a plurality of microcapsules disposed therein in its axial region, the axial region being the aforementioned smoking article 1 ) As specified for the first filter section 6 of. The first compartment 46 is wrapped with a first plug wrap 49.

The filter 44 comprises a fibrous filter material 51 formed in a tubular shape at the mouth-end of the filter 44 and through the center of the filter material 51 as described above with reference to the channel 12 of FIG. Or a second section 50 having a channel 52 extending through the axial region of the filter material. In this example, the tubular filter compartment is formed of cellulose acetate tow and wrapped with a second plug wrap 53.

In use, the smoking article 41 illustrated in FIG. 3 operates in the same manner as the smoking article 1 illustrated in FIG. 1. However, rather than rupturing a single capsule 8 to release the smoke modifying additive, the consumer ruptures the plurality of microcapsules 48 before or during smoking of the smoking article 41. In doing so, a greater flow of the main smoke flow is passed through the axial region of the first filter section 46 where the smoke modifying additive released from the microcapsules is located, and consequently to the second filter section 50. Is oriented. Accordingly, when the smoking article is smoked, the increased flow of the main smoke flow improves the delivery of the smoke modifying additive to the consumer, and the smoking article 41 is thus more of a smoke modifying additive to the consumer than conventional smoking articles. It can show improved delivery.

4 is a schematic illustration of a smoking article 61 having a filter according to a further embodiment of the invention. The features of the smoking article 61 are the same as those of the smoking article 1 described with reference to FIG. 1, unless otherwise stated below. The smoking article 61 comprises a packaging material 63, in this example a tobacco rod 62 wrapped with cigarette paper, the tobacco rod being placed over the filter 64 and a tipping partially overlying the packaging material 63 It is connected longitudinally to the filter 64 by means of a material 65. The filter 64 comprises three filter sections comprising a first central section 66, the first central section comprising an absorbent material 67 and a capsule 68 disposed in its axial region, This axial region is as defined in relation to the first filter section 6 of the smoking article 1 described above. The first compartment 66 is wrapped with a first plug wrap 69.

The second filter section 70 comprises a fibrous filter material 71 disposed at the mouth-end of the three-part filter 64 and formed in a tubular shape, and has a channel 72, which channel ( As described above with reference to 12), it extends through the center of the filter material 71 or through the axial region of the filter material. In this example, the tubular filter compartment is formed from cellulose acetate tow and wrapped with a second plug wrap 73.

The third filter section 74 comprises granules of adsorption material 75, in this case activated carbon granules, disposed at the cigarette-end of the three part filter 64 and dispersed within the fiber filter material 76. In this example, the adsorbent material 75 is formed of cellulose acetate tow and is wrapped with a third plug wrap 77. In this example, 40 mg of activated carbon granules are used, although other amounts, for example 10 mg to 80 mg or 10 mg to 50 mg of activated carbon may be used.

In this example, the capsule 68 is provided within a portion of the first filter section 66 to the upstream end of the first filter section or to the tobacco rod 62 rather than to the downstream end of the first filter section 66 or It is located closer to the 2 filter section 70. In particular, the distance'd' between the center of the capsule 68 and the downstream end of the first filter section 66 is approximately 30% of the total longitudinal length of the first filter section 66. In alternative embodiments, the capsule 68 may be positioned at a longitudinal center within the first filter section 66 or closer to the upstream end of the first filter section 66 than to the downstream end.

Other section lengths may be used, but the first filter section 66 has a length of 10 mm in this example, the second filter section 70 has a length of 7 mm and the third filter section 74 has a length of 10 mm. Have a length Ventilation is provided at a location 22 mm from the mouth end of the smoking article 61 into the third filter compartment.

In use, the smoking article 61 illustrated in FIG. 4 operates in a manner similar to the smoking article 1 illustrated in FIG. 1, with an additional third filter section 74 upstream of the first filter section 66. The addition of the filter provides selective smoke filtration and thus does not affect the delivery of smoke modifying additives to the consumer.

5 is a schematic illustration of a smoking article 81 having a filter according to a further embodiment of the invention. The features of the smoking article 81 are the same as the features of the smoking article 61 described with reference to FIG. 4, unless otherwise stated below. The smoking article 81 comprises a packaging material 83, in this example a tobacco rod 82 wrapped with cigarette paper, the tobacco rod overlying the filter 84 and a tipping material partially overlying the packaging material 83 It is connected to the filter 84 in the longitudinal direction by 85. The filter 84 comprises three filter sections, comprising a first central section 86 and the first central section comprising absorbent material 87, and the axis of the first central section, not capsule 68. It comprises a seal 88 arranged in the adsorbent material in a directional region, the axial region as defined in connection with the first filter section 6 of the smoking article 1 described above. The first compartment 86 is wrapped with a first plug wrap 89.

The second filter section 90 comprises a fibrous filter material 91 disposed at the mouth-end of the three-part filter 84 and formed in a tubular shape, and has a channel 92, which channel ( It extends through the center of the filter material 91 or through the axial region of the filter material as described above with reference to 12). In this example, the tubular filter compartment is formed from cellulose acetate tow and wrapped with a second plug wrap 93.

The third filter section 94 comprises granules of adsorption material 95, in this case activated carbon granules, disposed at the tobacco-end of the three part filter 84 and dispersed in the fiber filter material 96. The third filter section 94 also comprises granules of adsorbent material 97 dispersed in the circumferential region of the third filter section, in this case activated carbon granules. However, in alternative examples, they can be omitted. In this example, the fibrous filter material 96 is formed from cellulose acetate tow and the third filter compartment 94 is wrapped with a third plug wrap 98. Granules of adsorbent material 97 dispersed in the circumferential region of the third filter compartment 94 are applied to the inner surface of the plug wrap 98 in a pattern of strips extending in the longitudinal direction, four of which are the third filter It is evenly spaced radially around the compartments 94. Attachment of strips of granular adsorbent material 97 to the plug wrap in a symmetrical pattern around the filter compartment can help prevent the filter compartment from becoming deformed as a result of the adhesive used, while the granules present in the filter compartment Maximize the amount of mold material 97.

Although other section lengths may be used, the first filter section 86 has a length of 10 mm in this example, the second filter section 90 has a length of 7 mm and the third filter section 94 has a length of 10 mm. It has a length of mm. Ventilation is provided, for example, into the first and third filter compartments at respective positions of 13 mm and 20 mm from the mouth end of the smoking article 81.

In use, the smoking article 81 illustrated in FIG. 5 operates in a similar manner to the smoking article 21 illustrated in FIG. 2, with an additional third filter compartment 94 upstream of the first filter compartment 86. Provides optional smoke filtration and therefore does not affect the delivery of smoke modifying additives to the consumer.

6 is a schematic illustration of a smoking article 101 according to a further embodiment of the present invention. The smoking article 101 is generally cylindrical in shape and is in a regular, king size format, ie has a length in the range of 75 to 91 mm and a circumference in the range of 23 to 25 mm. The smoking article 101 comprises a packaging material 103, in this example a tobacco rod 102 wrapped with cigarette paper, which tobacco rod is placed over the filter 104 and a tipping that partially overlies the packaging material 103 It is connected longitudinally to the filter 104 by the material 105. The filter 104 includes an absorbent material 107 and includes a first compartment 106 at the tobacco rod end of the filter 104 which is wrapped with a first plug wrap 108.

The filter 4 comprises a fibrous filter material 110 formed in a tubular shape and further comprises a second compartment 109 at the mouth end of the filter 104 having a channel 111, the channel being shown in FIG. It extends through the center of filter material 110 or through an axial region of filter material as described above with reference to channel 12. In this example, the tubular filter compartment is formed from cellulose acetate tow and wrapped with a second plug wrap 112.

The tobacco rod 102 includes a plurality of microcapsules 113 disposed in the axial region of the tobacco rod at the filter end of the tobacco rod 102, the axial region being the axial region within the tobacco rod 102 Apart from being positioned, it is similar in position and size to that defined in connection with the first filter section 6 of the smoking article 1 described above.

The axis of the smoking article 1 along which the tobacco rod 2 and the first and second filter sections 46 and 50 are arranged is indicated as'a' in FIG. 1.

In use, the smoking article 101 illustrated in FIG. 6 operates in a similar manner to the smoking article 41 illustrated in FIG. 3. However, without rupturing the plurality of microcapsules 48 in the filter compartment before or during smoking of the smoking article 41, the consumer ruptures the plurality of microcapsules 113 located within the tobacco rod 102. In doing so, the larger flow of the main smoke flow is consequently through the axial region of the filter end of the tobacco rod 2 where the smoke modifying additive emitted from the microcapsules is located inside the second filter section 109 Is oriented. The increased flow of the main smoke flow improves the delivery of the smoke modifying additive to the consumer and the smoking article 101 can thus show an improved delivery of the smoke modifying additive to the consumer over conventional smoking articles.

7 is a schematic illustration of a smoking article 121 having a filter according to a further embodiment of the present invention. The features of the smoking article 121 are the same as the features of the smoking article 1 described with reference to FIG. 1 unless otherwise stated below. The smoking article 121 comprises a packaging material 123, in this example a tobacco rod 122 wrapped with cigarette paper, the tobacco rod overlying the filter 124 and a tipping material partially overlying the packaging material 123 It is connected to the filter 124 in the longitudinal direction by 125. The filter 124 comprises a first compartment 126 at the mouth end of the filter 124 and not at the tobacco end of the filter, the first compartment being an absorbent material 127 and a capsule disposed in the axial region of the absorbent material ( 128), the axial region as defined in relation to the first filter section 6 of the smoking article 1 described above. The first compartment 126 is wrapped with a first plug wrap 129. The capsule 128 contains an additive capable of modifying the main smoke flow through the filter 124, in this case a menthol flavoring agent.

The filter 124 further includes a second section 130 at the end of the cigarette rod of the filter 124, not at the mouth end of the filter 124, and the second section is formed in a tubular shape and has a fiber filter having a channel 132 Material 131 and the channel 132 extends through the center of the filter material 131 or through the axial region of the filter material similar to the second section 10 of the filter 4 of FIG. . In this example, the tubular filter compartment is formed of cellulose acetate tow and wrapped with a second plug wrap 133.

The first fragment 126 is a cellulose acetate fragment formed using continuous cellulose acetate fibers and a plasticizer. The capsule 128 can be inserted into the filter material during formation of the filter section 126 using existing processes and machinery. In this example, the capsule 128 is within a portion of the first filter section 126, upstream of the first filter section 126 than the downstream end of the first filter section 126 or the mouth end of the smoking article 121. It is located closer to the end or second filter section 130. In particular, the distance'd' between the upstream end of the first filter section 126 and the center of the capsule 128 is approximately 30% of the total longitudinal length of the first filter section 126. In alternative embodiments, the capsule 128 may be located longitudinally centered within the first filter section 126 or closer to the downstream end of the first filter section 126 than the upstream end.

Although not illustrated, the embodiment of FIG. 7 also provides a third filter section upstream of the second filter section 130 corresponding to any of the third filter sections 74 and 94 described with reference to FIGS. 4 and 5. It may include a filter compartment.

In use, the smoking article 121 illustrated in FIG. 7 operates in a similar manner to the smoking article 1 illustrated in FIG. 1. When the capsule 128 is ruptured to release the smoke modifying additive, due to the second filter section 130, a more flow of the main smoke flow is caused by the first filter section 126 in which the contents of the capsule 128 are released into the interior. ) Is directed through the axial region of Thus, when a smoking article is smoked, the increased flow of the main smoke flow improves the delivery of the smoke modifying additive to the consumer and the smoking article 121 thus improves the smoke modifying additive to the consumer over conventional smoking articles. Can show the delivered delivery.

Although specific embodiments of the invention have been described, the invention is not limited to these embodiments. For example, although the second filter section has been described above as a tubular portion of the fibrous filter material, it may take other forms, such as filter material sections with low density regions extending through the axial region of the filter material sections. have. Also, although the tubular section or other section with reduced density within the axial region has been described as being at the mouth end of the filter in some embodiments above, the center of the multi-part filters or It can alternatively be used as the upstream end, for example upstream of the compartment in which the smoke modifying additive is located, but still benefit from the effects of the invention. In particular, the presence of such a filter section will facilitate directing the main smoke flow both upstream and downstream of the axial region into the axial region of the smoking article by means of a low resistance to draw coincident with the axial region. I can.

The first, second and (if any) third filter sections described above are individual pieces. Although the first, second and (if any) third filter sections described above are connected to each other using a tipping material, these filter sections are individually separated and distinguished along their shape and before being connected to each other. The tipping material also connects the filter sections to each tobacco rod in each embodiment. In alternative examples of each of the described embodiments, an additional plug wrap connects the first, second and (if any) third individual filter sections before they are connected to the tobacco rods using the tipping material. Can be used for

In order to address various issues and advance the technology, the whole of this disclosure illustrates by way of example various embodiments in which the claimed invention(s) may be practiced and provide good delivery of smoke modifying additives. The advantages and features of the present disclosure are merely representative samples of embodiments and are not inclusive and/or exclusive. They are presented only to aid understanding and to teach claimed features. Advantages, embodiments, examples, functions, features, structures and/or other aspects of the present disclosure are not to be considered as limitations to the disclosure defined by the claims or limitations to equivalents of the claims, It should be understood that other embodiments may be used and modifications may be made without departing from the scope and/or spirit of the present disclosure. Various embodiments may suitably include, consist of, or consist essentially of various combinations of the disclosed elements, components, features, parts, steps, means, and the like. Furthermore, the present disclosure is not currently claimed, but includes other inventions that may be claimed in the future.

Claims (24)

A smoking article in the form of a heat-not-burn product capable of generating an aerosol for delivery to a consumer, wherein the heated-non-burn product comprises a filter, the filter comprising:
A first separate filter compartment comprising a continuous filter material and an aerosol modifying additive disposed within the axial region of the filter material, wherein the aerosol modifying additive is disposed only within the axial region of the first filter compartment, or A first filter compartment disposed in a greater concentration within the axial region than in the non-axial regions of the aerosol modifying additive and disposed on a thread formed of cellulose acetate fibers; And
One or more channels located in the axial region of the second filter section for directing the aerosol through the axial region of the first filter section in which the thread is placed during use, as a separate second filter section connected to the first filter section Including a second filter section comprising a,
A second filter section is connected to the first filter section so as to form a second filter section immediately upstream of the first filter section when included in a smoking article,
The second filter section comprises a tubular filter section comprising a wall thickness of 1 mm to 3 mm,
The smoking article, wherein the channel comprises a hollow passage having a diameter of 2 mm to 5 mm through the second filter section. The method of claim 1,
A smoking article, wherein the tubular filter compartment is formed from a fibrous filter material. The method of claim 2,
A smoking article, wherein the tubular filter compartment is formed from cellulose acetate tow. The method of claim 1,
The smoking article, wherein the at least one channel has a lower resistance to aerosol passing through the at least one channel than other regions of the second filter compartment. The method of claim 1,
A smoking article, wherein the axial region of at least one of the first filter section and the second filter section has a radius of 1 mm to 3 mm and is located at the center of the axis of the smoking article. The method of claim 5,
The smoking article, wherein the axial region of at least one of the first filter section and the second filter section has a radius of 2.5 mm. The method of claim 1,
A smoking article, wherein the first filter compartment is wrapped with a first plug wrap and the second filter compartment is wrapped with a second plug wrap. The method of claim 1,
A smoking article, wherein the aerosol modifying additive comprises menthol. The method of claim 1,
A smoking article, wherein the aerosol modifying additive comprises a flavoring agent having a loading level of 0.1 mg to 10 mg. The method of claim 9,
A smoking article, wherein the aerosol modifying additive comprises a flavoring agent having a loading level of 0.2 mg to 2 mg. The method of claim 1,
A smoking article further comprising a third separate filter section connected to the second filter section, wherein the third filter section is formed upstream of the second filter section when incorporated within the smoking article. The method of claim 11,
A smoking article, wherein the third filter section comprises a fibrous filter material and a granular adsorbent material. The method of claim 12,
The granular adsorbent material is disposed in the circumferential region of the third filter section, dispersed within the filter material of the third filter section, or dispersed within the third filter section and some granular adsorbent material disposed in the circumferential region of the third filter section. A smoking article comprising several granular adsorbent materials. delete delete delete delete delete delete delete delete delete delete delete

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