KR20190117816A - A filter for a smoking article - Google Patents

Abstract

The filter for smoking article 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 one or more channels, the channel being used It is located in the axial region of the second filter section to direct smoke through the axial region of the first filter section. The smoke modifying additive may comprise a flavoring agent such as menthol and the second filter section may comprise a tubular section of the fiber filter material. Absorption filter sections may also be provided.

Description

Smoking filter {A FILTER FOR A SMOKING ARTICLE}

The present invention relates to a smoking article including a filter and a filter for smoking article.

Known smoking articles filters, such as cigarette filters, generally comprise a continuous tow of filamentary cellulose acetate. Cellulose acetate is collected to form a rod that is cut to form individual filter sections. The smoke filter may be made from one segment of the filter rod or from a plurality of segments with or without cavities or spaces between the segments.

According to embodiments of the 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 smoking article comprising a section is provided, the second filter section of filter material for directing smoke through the axial region of the filter material and the first filter section in which the smoke modifying additive is disposed therein. One or more channels located axially. The first and second filter sections may be separate filter sections and / or the smoke modification additive may only be disposed in the axial direction of the filter material of the first filter section or the non-axis of the filter material of the first filter section. It may be arranged 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 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 included 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 may be formed of fiber filter material.

The smoke modification additive may be disposed at 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 may 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 more of the smoke through the axial region of the first filter section than to pass through the non-axial regions of the first filter section during use.

The smoke modifying additive may comprise an encapsulated additive. The smoke modifying additive may be contained in a capsule located in the first filter section that is not a central longitudinal position in the first filter section.

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

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

The filter may further comprise a third filter section, wherein 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 included into a smoking article. The third filter section may be a separate filter section. The third filter section may comprise a fiber filter material and a granular adsorption material. The granular adsorption material may be disposed in the circumferential region of the third filter section, dispersed in the filter material of the third filter section, or some granular adsorption material and the third filter disposed in the circumferential region of the third filter section. Several granular adsorption materials dispersed within the section.

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

The second filter section may 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, there is provided a smoking article comprising a first section comprising an aerosol generating material and an aerosol modifying additive disposed in an axial region of the aerosol generating material, and a second section comprising a filter. Further provided, the channel has one or more channels positioned in the axial region of the filter for directing the aerosol generated by the aerosol generating material in use through the axial region of the first section.

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

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

The second section may direct more of the smoke through the axial region of the first section than through the non-axial regions of the first section 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 with an upstream filter section comprising a tubular downstream filter section and an encapsulated additive in the form of a frangible capsule;
2 is a schematic illustration of a smoking article having a filter with a filter section comprising a tubular filter section and a thread carrying additives;
3 is a schematic illustration of a smoking article having a filter with a tubular filter section and a filter section comprising a plurality of burstable capsule encapsulated additives;
4 is a schematic illustration of a smoking article having a filter similar to the filter described with reference to FIG. 1 but also including an additional filter section with adsorbent dispersed in the filter material;
FIG. 5 is a schematic illustration of a smoking article having a filter similar to the filter described with reference to FIG. 2 but also including an additional filter section disposed in the circumferential region of the filter material and comprising an adsorbent dispersed in the filter material;
6 is a schematic illustration of a smoking article having an aerosol generating section and a tubular filter section, said aerosol generating section having an additive encapsulated in the form of a plurality of microcapsules disposed in an axial region of the aerosol generating section;
7 is a schematic illustration of a smoking article having a filter with a tubular upstream filter section and a downstream filter section comprising encapsulated additive in the form of a burstable capsule.

As used herein, the term "smoking article" refers to cigarettes, cigars and cigars based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco or tobacco substitutes. Smokeable products such as cigarillos and also heat-not-burn products and other nicotine delivery devices capable of producing aerosols for delivery to consumers. Such smokers may be provided with filters for gaseous flow blown by the smokers.

Smoking articles such as cigarettes and formats of smoking articles are often named according to the length of the cigarette: "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 from 91 to 105 mm, eg, from 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: "regular" (about 23 to 25 mm), "wide" (greater than 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 regular, king-sized format, ie circumference of 23 to 25 mm and overall length of 75 to 91 mm, are preferred by many consumers.

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

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

As used herein, the terms "upstream" and "downstream" are relative terms defined in terms of the direction of the mainstream smoke (or other aerosol) blown through the smoking stream during use.

1 is a schematic illustration of a smoking article 1 generally cylindrical in shape and in a regular, king size format, i.e. in the range 75 to 91 mm in length and in the circumference of 23 to 25 mm. The smoking article 1 comprises a wrapping material 3 longitudinally connected to the filter 4 by the tipping material 5, in this example a tobacco rod 2 wrapped with cigarette paper and the tipping Material is placed on the filter 4 and partly on the packaging material 3 to connect the filter 4 to the tobacco rod 2. The filter 4 comprises a first section 6 at the tobacco rod end of the filter 4, the first section having an capsule 8 disposed therein in the axial region of the filter material of the first section 6. Adsorption material (7). The axial region is in this example a region centered on the axis 'a' of the smoking article 1, having a radius of about 3 mm. In alternative embodiments, the radius of the axial region can range anywhere from 1 mm to 4 mm, or 1 mm to 3 mm, or can be 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 the axial region than the non-axial region of the filter material of the first filter section 6. At higher concentrations. The first section is wrapped with a first plug wrap 9.

The filter 4 is a second section 10 comprising a fiber filter material 11 having a channel 12 extending in the tubular shape at the mouth-end of the filter 4 and extending through the center of the filter material 11. More). The empty or hollow channel 12 extending through the center of the filter material 11 may be 1 mm to 6 mm in diameter, for example 2 mm to 5 mm in diameter. The channel 12 extending through the center of the filter material 11 is in this example an empty, hollow passageway. The channel extends through the axial region of the filter material of the second filter section 10 in some embodiments. The axial region of the second filter section 10 is in this example a region centered on the axis 'a' of the smoking article 1, having a radius of about 2.5 mm. In alternative embodiments, the radius of the axial region can range anywhere from 1 mm to 4 mm, or 1 mm to 3 mm, or can be about 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm or 3.5 mm. have. In this example, the tubular filter section 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 range anywhere from 1 m to 4 mm, or 1 mm to 3 mm, or can be about 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm or 3.5 mm. However, certain dimensions can 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 fluid additives that modify the characteristics of the main smoke flow through the smoking stream 1. The capsule 8 can be manufactured using the existing processes and machinery and inserted into the first filter section 6. Other fluids and granule additives may be contained in the capsule 8 in this example, but the capsule 8 contains a menthol flavourant. The capsule may be ruptured by the consumer to release the fluid additive into the adsorption filter material 11.

The axis of the smoking article 1 is represented 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 located in the center of the capsule substantially along the axis 'a'. In this example, the capsule 8 is offset from the longitudinal center of the first filter section 6. The capsule 8 may be located, for example, in a position 1 mm to 10 mm from the longitudinal center position in the first filter section 6 in the first filter section 6. The capsule 8 is located closer to the downstream end of the first filter section 6 in a portion 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 may be located closer to the upstream end of the first filter section than to the center or the downstream end in the longitudinal direction in the first filter section 6.

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

In use, the tobacco rod 2 of the smoking article 1 is lit by the consumer in a conventional manner and the 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 in the channel 12. Oriented through). This in turn results in a larger 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 the smoking of the smoking article 1, the smoke modifying additive (menthol in this case) contained in the capsule is at a higher concentration into the axial region of the first filter section 6. The main smoke flow of the discharged and increased flow through this axial region is consequently directed to the second filter section 10. Thus, 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 section 10 than to the tobacco rod 2 in a portion of the first filter section 6, once released, the capsule 8 on the contents of the capsule 8 The increased flow of the main smoke stream is further improved. The use of the tubular second section 10 at the mouth end of the smoking article 1 allows for smoking rather than is possible when the first section 6 comprising the capsule 8 is at the mouth end of the smoking article 1. It is possible to position the capsule 8 closer to the mouth end of the stream 1. This is because the tube separates the first section 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 identical to those 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, which tipping material overlies the filter 24 and partially overlies the packaging material 23. It is connected to the filter 24 in the longitudinal direction by 25. The filter 24 includes a first section 26 at the end of the tobacco rod of the filter 24 comprising the adsorption material 27. In this case, rather than placing the capsule 8 in the first filter section, the adsorbent material 27 is disposed in the adsorbent material in the axial region (not shown) of the first section 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 thread may be formed, for example, of cellulose acetate fibers or cotton, and loaded with 0.1 to 10 mg of flavourant, such as menthol flavourant. Flavor loading levels of 0.2 to 2 mg or 0.2 to 1 mg were found to be effective. The first section 26 is wrapped with a first plug wrap 29. The thread 28 carries additives, in this case menthol flavourants, which can modify the main smoke flow through the filter 24.

Filter 24 includes a filter material 31 that is formed in a tubular shape at the mouth end of filter 24 and is similar to the second section 10 of filter 4 of FIG. 1 described above. And a second section 30 having a channel 32 extending through the center of the filter or through an axial region of the filter material. In this example, the tubular filter section is formed of cellulose acetate tow and wrapped with a second plug wrap 33.

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

In use, the smoking article 21 illustrated in FIG. 2 operates in a similar manner to the smoking article 1 illustrated in FIG. 1. However, without bursting the capsule 8 to release the smoke modifying additive, the consumer can simply smoke the smoker 21 in a conventional manner. By doing so, a larger flow of main smoke stream is consequently through the axial region of the first filter section 26 where the thread 28 holding the smoke modifying additive is located, consequently to the second filter section 30. Is oriented. Thus, when smoking is smoked, the increased flow of main smoke flow improves the delivery of the smoke modifying additive to the consumer and thus the smoker 1 thus delivers an improved delivery of the smoke modifying additive to the consumer than conventional smoking products. Can show.

3 is a schematic illustration of a smoking article 41 having a filter according to a further embodiment of the present invention. The features of the smoking article 41 are identical to those of the smoking article 1 described with reference to FIG. 1, unless otherwise noted below. The smoking article 41 comprises a packaging material 43, in this example a tobacco rod 42 wrapped with cigarette paper, which tipping material overlies the filter 44 and partially overlies the packaging material 43. It is connected to the filter 44 in the longitudinal direction by 45. The filter 44 includes a first section 46 at the tobacco rod end of the filter 44 that includes the adsorption material 47. In the present case, no capsule 8 is arranged in the first filter section, and the adsorbent material 47 has a plurality of microcapsules disposed therein into its axial region, the axial region being the smoking article 1 described above. As defined for the first filter section 6). The first section 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. 1. Or a second section 50 having a channel 52 extending through the axial region of the filter material. In this example, the tubular filter section 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 bursting the single capsule 8 to release the smoke modifying additive, the consumer bursts the plurality of microcapsules 48 before or during the smoking of the smoking article 41. In doing so, a larger flow of main smoke flow passes through the axial region of the first filter section 46 where the smoke modifying additive released from the microcapsules is located, consequently to the second filter section 50. Is oriented. Thus, when the smoking stream is smoked, the increased flow of the main smoke stream enhances the delivery of the smoke modification additive to the consumer and the smoking stream 41 thus improves the delivery of the smoke modification additive to the consumer rather than the conventional smoking streams. 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 packaged with cigarette paper, which tipping material overlies the filter 64 and partially overlies the packaging material 63. It is connected to the filter 64 in the longitudinal direction by the 65. The filter 64 comprises three filter sections comprising a first central section 66, the first central section comprising an adsorption material 67 and a capsule 68 disposed in its axial region, The axial region is as defined in relation to the first filter section 6 of the smoking article 1 described above. The first section 66 is wrapped with a first plug wrap 69.

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

The third filter section 74 comprises granules of adsorbent material 75, in this case activated carbon granules, disposed in the tobacco-end of the three-part filter 64 and dispersed in the fiber filter material 76. In this example, the adsorbent material 75 is formed of cellulose acetate tow and 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 the present example, the capsule 68 is formed in a portion of the first filter section 66 to the upstream end of the first filter section or to the downstream end of the first filter section 66 rather than to the tobacco rod 62. 2 is located closer to the 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 located closer to the upstream end of the first filter section 66 than to the longitudinal center or to the downstream end within the first filter section 66.

Although other section lengths may be used, 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. Has a length. Aeration is provided at a position of 22 mm from the mouth end of the smoking article 61 into the third filter section.

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

5 is a schematic illustration of a smoking article 81 having a filter in accordance with a further embodiment of the present 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 noted below. The smoking article 81 comprises a packaging material 83, in this example a tobacco rod 82 wrapped with cigarette paper, which is placed over the filter 84 and partially over the packaging material 83. 85 is longitudinally connected to the filter 84. The filter 84 comprises three filter sections, including a first center section 86 and the first center section includes an adsorption material 87 and is the axis of the first center section, not the capsule 68. A thread 88 is arranged in the adsorption material in the directional region, the axial region as defined in relation to the first filter section 6 of the smoking article 1 described above. The first section 86 is wrapped with a first plug wrap 89.

The second filter section 90 comprises a fibrous filter material 91 disposed in the mouth-end of the three-part filter 84 and formed into a tubular shape and having a channel 92 which is the channel of FIG. 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 section is formed of cellulose acetate tow and wrapped with a second plug wrap 93.

The third filter section 94 comprises granules of adsorbent material 95, in this case activated carbon granules, disposed in 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, in this case activated carbon granules, dispersed in the circumferential region of the third filter section. However, in alternative examples they may be omitted. In this example, the fiber filter material 96 is formed of cellulose acetate tow and the third filter section 94 is wrapped with a third plug wrap 98. Granules of adsorbent material 97 dispersed in the circumferential region of the third filter section 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 third filters It is evenly spaced radially around the section 94. The attachment of the strips of granular adsorption material 97 to the plug wrap in a symmetrical pattern about the filter section can help prevent the filter section from deforming as a result of the adhesive used, while the granules present in the filter section The amount of mold material 97 is maximized.

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. has a length of mm. Aeration is provided into the first and third filter sections at respective positions of 13 mm and 20 mm, for example, 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 the additional third filter section 94 upstream of the first filter section 86. The addition provides optional smoke filtration and thus does not affect the delivery of the smoke modification additive to the consumer.

6 is a schematic illustration of a smoking article 101 according to a further embodiment of the present invention. Smoking articles 101 are generally cylindrical in shape, in regular, king size format, ie have 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 tipping material overlies the filter 104 and partially overlies the packaging material 103. It is connected to the filter 104 in the longitudinal direction by the 105. The filter 104 includes a first section 106 at the end of the tobacco rod of the filter 104 that includes the absorbent material 107 and is wrapped with the first plug wrap 108.

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

Cigarette rod 102 includes a plurality of microcapsules 113 disposed at the filter end of tobacco rod 102 in the axial region of the tobacco rod, wherein the axial region is located within the tobacco rod 102. Except for that, the position and size are similar to those defined in relation to 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, 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 section before or during smoking of the smoking article 41, the consumer ruptures the plurality of microcapsules 113 located in the tobacco rod 102. In doing so, the larger flow of main smoke flow is consequently passed through the axial region of the filter end of the tobacco rod 2 where the smoke modifying additive released from the microcapsules is located. Is oriented. Increased flow of the main smoke stream enhances delivery of the smoke modifying additive to the consumer and the smoke stream 101 may thus show improved delivery of the smoke modifying additive to the consumer than conventional smokers.

7 is a schematic illustration of a smoking article 121 having a filter in accordance with a further embodiment of the present invention. The features of the smoking article 121 are the same as those 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 partially overlying the packaging material 123 ( 125 is connected to the filter 124 in the longitudinal direction. The filter 124 includes a first section 126 at the mouth end of the filter 124, rather than the tobacco end of the filter, the first section being disposed in the adsorption material 127 and in the axial region of the adsorption material ( 128, the axial region as defined in relation to the first filter section 6 of the smoking article 1 described above. The first section 126 is wrapped with a first plug wrap 129. Capsule 128 contains additives, in this case menthol flavors, that can alter the main smoke flow through filter 124.

The filter 124 further includes a second section 130 at the tobacco rod end of the filter 124 that is not the mouth end of the filter 124, the second section being tubular in shape and having a channel 132. Material 131 and the channel 132 extends through the center of the filter material 131 or through an axial region of the filter material, similar to the second section 10 of the filter 4 of FIG. 1. . In this example, the tubular filter section is formed of cellulose acetate tow and wrapped with a second plug wrap 133.

The first piece 126 is a cellulose acetate piece formed using continuous cellulose acetate fibers and a plasticizer. The capsule 128 may be inserted into the filter material during the formation of the filter section 126 using existing processes and machinery. In this example, the capsule 128 is in a portion of the first filter section 126 at an upstream end of the first filter section 126 that is not a downstream end of the first filter section 126, or in a second filter section ( 130, or closer to the mouth end of the smoking article 121. 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 within the first filter section 126 at a longitudinal center 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 includes a third upstream of the second filter section 130 corresponding to any of the third filter sections 74, 94 described with reference to FIGS. 4 and 5. It may include a filter section.

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 ruptures to release the smoke modifying additive, more flow of main smoke flows through the axial region of the first filter section 126 where the contents of the capsule 128 are released into the interior. 2 is directed to the filter section 130. Thus, when the smoking stream is smoked, the increased flow of main smoke flow improves the delivery of the smoke modification additive to the consumer and the smoking stream 121 thus improves the smoke modification additive to the consumer over conventional smoking streams. Can show forwarded delivery.

While specific embodiments of the invention have been described, the invention is not limited to such embodiments. For example, although the second filter section has been described above as a tubular portion of the fiber 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, while the tubular section or other section with reduced density in the axial region has been described as being at the mouse end of the filter in some of the above embodiments, in either of the embodiments the center or An upstream end, for example a smoke modifying additive, may alternatively be used upstream of the section where it is located, but still benefit from the effects of the present invention. In particular, the presence of such a filter section may facilitate directing the main smoke flow both upstream and downstream of the axial region to the axial region of the smoking stream by a low resistance to blow in line with the axial region.

The aforementioned first, second and third filter sections (if present) are separate fragments. Although the aforementioned first, second and third filter sections (if present) are connected to each other using tipping material, these filter sections are separately separated and distinguished according to their shape and before connecting to each other. The tipping material also connects the filter sections to each tobacco rod of each embodiment. In each of the alternative embodiments described, an additional plug wrap is provided for connecting the first, second and third individual filter sections (if present) before they are connected to the tobacco rods using the tipping material. Can be used.

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

Claims (24)

As a filter for smoking,
A separate first filter section comprising a filter material and a smoke modifying additive disposed within the axial region of the filter material; And
A second, separate filter section connected to the first filter section;
The second filter section includes a filter material and one or more channels, the channel of which is in use an axis of the filter material for directing smoke through an axial region of the first filter section in which the smoke modifying additive is disposed. Located in an directional region, wherein the smoke modifying additive is disposed only within the axial region of the filter material of the first filter section or in the axial region than in non-axial regions of the first material of the first filter section Placed at a greater concentration within
Smoking filter. The method of claim 1,
The one or more channels have a lower resistance to smoke passing through the one or more channels than other regions of filter material of the first filter section.
Smoking filter. The method according to claim 1 or 2,
The channel is a hollow passage through the second filter section,
Smoking filter. The method according to any one of claims 1 to 3,
The second filter section is connected to the first filter section such that when included into a smoking stream, a second filter section is formed immediately upstream or downstream of the first filter section;
Smoking filter. The method according to any one of claims 1 to 4,
Wherein the axial region of the filter material of the first and / or second filter sections has a radius of 1 mm to 4 mm and is located at the center of the axis of the smoking article,
Smoking filter. The method according to any one of claims 1 to 5,
Wherein the first filter section comprises a continuous filter material having the smoke modifying additive disposed within its axial region;
Smoking filter. The method according to any one of claims 1 to 6,
The second filter section comprises a tubular filter section,
Smoking filter. The method of claim 7, wherein
The tubular filter section is formed of a fiber filter material,
Smoking filter.
The method according to any one of claims 1 to 8,
The second filter section is configured to direct more of the smoke through the axial region of the first filter section than through the non-axial regions of the first filter section during use,
Smoking filter. The method according to any one of claims 1 to 9,
Wherein the smoke modifying additive comprises an encapsulated additive,
Smoking filter. The method of claim 10,
Wherein the smoke modifying additive is contained within a capsule located in the first filter section that is not a longitudinal central position in the first filter section.
Smoking filter. The method of claim 11,
The capsule is located within the first filter section, which is a position between 1 mm and 10 mm from the longitudinal center position in the first filter section,
Smoking filter. The method according to any one of claims 1 to 9,
The smoke modifying additive is disposed on a carrier material,
Smoking filter. The method of claim 13,
Wherein the carrier material comprises a thread;
Smoking filter. The method according to any one of claims 1 to 14,
Further comprising a separate third filter section connected to the first filter section, the third filter section being formed upstream of the first filter section when incorporated into a smoking stream,
Smoking filter. The method of claim 15,
Wherein the third filter section comprises a fiber filter material and a granular adsorption material,
Smoking filter. The method of claim 13,
The granular absorbent material may be disposed in the circumferential region of the third filter section, dispersed in the filter material of the third filter section, or some granular absorbent material and the first agent disposed in the circumferential region of the third filter section. 3 comprising several granular adsorbent materials dispersed within the filter section,
Smoking filter. A filter comprising the filter according to claim 1,
Smoking products. The method of claim 18,
The second filter section is arranged immediately downstream of the first filter section and at the mouth-end of the smoking article,
Smoking products. As smoking,
A first section comprising an aerosol generating material and an aerosol modifying additive disposed within an axial region of the aerosol generating material, and
A second section comprising a filter having one or more channels,
The channel is located in the axial region of the second section for directing the aerosol produced by the aerosol generating material through the axial region of the first section during use;
Smoking products. The method of claim 20,
The second section comprises a tubular filter section,
Smoking products. The method of claim 21,
The tubular filter section is formed of a fiber filter material,
Smoking products. The method according to any one of claims 20 to 22,
The aerosol modifying additive is disposed at a greater concentration in the axial region than in the non-axial regions of the aerosol generating material of the first section,
Smoking products. The method according to any one of claims 20 to 23,
Wherein the second section directs more of the smoke through the axial region of the first section than through the non-axial regions of the first section during use,
Smoking products.

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