CIGARETTE

Abstract

A cigarette includes a tobacco rod, a support segment located at a downstream end of the tobacco rod, a cooling segment located at a downstream end of the support segment, and a mouthpiece located at a downstream end of the cooling segment. The cigarette further includes a corrugated inner wrapper configured to wrap the mouthpiece and an outer wrapper configured to wrap the corrugated inner wrapper.

Description

TECHNICAL FIELD

One or more embodiments of the present disclosure provide a cigarette including a tobacco rod and a filter rod.

BACKGROUND ART

Recently, the demand for alternative methods to overcome the shortcomings of general cigarettes has increased. For example, there is an increasing demand for a method of generating aerosol by heating an aerosol generating material in cigarettes, rather than by burning cigarettes.

A cigarette includes a filter, and the filter serves to filter certain ingredients contained in an aerosol, or cool the aerosol. When filtering performance of the filter is too high, the amount of aerosol transfer decreases, and when the filtering performance is too low, there is a problem in that certain ingredients contained in the aerosol are not filtered.

Therefore, research is being conducted on filters having appropriate performance by changing components constituting the filter or changing a structure of the filter.

DESCRIPTION OF EMBODIMENTS

Technical Problem

One or more embodiments of the present disclosure provide a cigarette including a corrugated inner wrapper configured to wrap a mouthpiece, and an outer wrapper configured to wrap the corrugated inner wrapper. A passage through which an aerosol passes is provided between the corrugated inner wrapper and the outer wrapper. Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by the practice of the presented embodiments.

Solution to Problem

A cigarette includes a tobacco rod, a support segment located at a downstream end of the tobacco rod, a cooling segment located at a downstream end of the support segment, and a mouthpiece located at a downstream end of the cooling segment.

The cigarette may further include a corrugated inner wrapper configured to wrap the mouthpiece, and an outer wrapper configured to wrap the corrugated inner wrapper.

Advantageous Effects of Disclosure

According to one or more embodiments of the present disclosure, a passage is formed between a corrugated inner wrapper configured to wrap a mouthpiece, and an outer wrapper configured to wrap the corrugated inner wrapper, and as an aerosol passes through the passage to be delivered to a user, the amount of aerosol transfer may be increased.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a diagram illustrating an example in which a cigarette is inserted into a holder.

FIG. 2 shows a view showing an example of the cigarette.

FIG. 3 is a cross-sectional view of a cigarette including a corrugated inner wrapper, according to an embodiment of the present disclosure.

FIG. 4 is a cross-sectional view of a mouthpiece including a corrugated inner wrapper, according to an embodiment.

FIG. 5 is a cross-sectional view of a cigarette including a perforated cooling segment, according to an embodiment.

FIG. 6 is a cross-sectional view of a cigarette including a corrugated inner wrapper, according to another embodiment.

BEST MODE

According to an aspect of the present disclosure, a cigarette includes: a tobacco rod; a support segment located at a downstream end of the tobacco rod; a cooling segment located at a downstream end of the support segment; and a mouthpiece located at a downstream end of the cooling segment, wherein the cigarette may further include a corrugated inner wrapper configured to wrap the mouthpiece, and an outer wrapper configured to wrap the corrugated inner wrapper.

According to another aspect of the present disclosure, a cigarette includes: a tobacco rod; a first support segment located at a downstream end of the tobacco rod; a second support segment that is located at a downstream end of the first support segment, and has an inner diameter larger than an inner diameter of the first support segment; and a mouthpiece located at a downstream end of the second support segment, wherein the cigarette may further include a corrugated inner wrapper configured to wrap the mouthpiece, and an outer wrapper configured to wrap the corrugated inner wrapper.

MODE OF DISCLOSURE

With respect to the terms used to describe the various embodiments, general terms which are currently and widely used are selected in consideration of functions of structural elements in the various embodiments of the present disclosure. However, meanings of the terms can be changed according to intention, a judicial precedence, the appearance of new technology, and the like. In addition, in certain cases, a term which is not commonly used can be selected. In such a case, the meaning of the term will be described in detail at the corresponding portion in the description of the present disclosure. Therefore, the terms used in the various embodiments of the present disclosure should be defined based on the meanings of the terms and the descriptions provided herein.

In addition, unless explicitly described to the contrary, the word “comprise” and variations such as “comprises” or “comprising” will be understood to imply the inclusion of stated elements but not the exclusion of any other elements. In addition, the terms “-er”, “-or”, and “module” described in the specification mean units for processing at least one function and operation and can be implemented by hardware components or software components and combinations thereof.

In terms of terms “upstream” and “downstream” in the following embodiments, the “upstream” refers to a portion where air flows into a cigarette from the outside, and the “downstream” refers to a portion where air flows out of the cigarette when a user inhales air, using the cigarette. The terms “upstream” and “downstream” are used to indicate relative positions between segments that constitute the cigarette. When using the cigarette, the user may bite a downstream end of the cigarette. A term “end portion” may also be described as an “end”.

Hereinafter, the present disclosure will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the present disclosure are shown such that one of ordinary skill in the art may easily work the present disclosure. The disclosure may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

FIG. 1 is a diagram illustrating an example in which a cigarette is inserted into a holder.

Referring to FIG. 1, a cigarette 2 may be inserted into a holder 1. When the cigarette 2 is inserted into the holder 1, a heater 130 is located in the cigarette 2. Thus, an aerosol generating material of the cigarette 2 is heated by the heated heater 130, and an aerosol is generated, accordingly.

The cigarette 2 may have a shape similar to a common combustion-type cigarette. For example, the cigarette 2 may be divided into a first portion 140 configured to include the aerosol generating material, and a second portion 150 configured to include a filter and the like.

The first portion 140 may be completely inserted into the holder 1, and the second portion 150 may be exposed to the outside. Alternatively, only a part of the first portion 140 may be inserted into the holder 1, or a part of the first portion 140 and of the second portion 150 may be inserted into the holder 1.

A user may inhale the aerosol while biting the second portion 150. In that case, the aerosol is generated when air from the outside passes through the first portion 140, and the generated aerosol passes through the second portion 150 and is delivered to the user's mouth.

Air may flow in from the outside through at least one air passage formed in the holder 1. Alternatively, air may flow in from the outside through at least one hole formed on a surface of the cigarette 2.

FIG. 2 is a configuration diagram illustrating an example of a cigarette.

Referring to FIG. 2, the cigarette 2 includes a tobacco rod 210, a first filter segment 221, a cooling structure 222, and a second filter segment 223. The first portion described above with reference to FIG. 1 includes the tobacco rod 210, and the second portion described above with reference to FIG. 1 includes the first filter segment 221, the cooling structure 222, and the second filter segment 223.

Referring to FIG. 2, the cigarette 2 may be packaged by wrappers 231, 232, 233, 234, 235, and 236. For example, the tobacco rod 210 is packaged by the first wrapper 231, and the first filter segment 221 is packaged by the second wrapper 232. The cooling structure 222 is packaged by the third wrapper 233, and the second filter segment 223 is packaged by the fourth wrapper 234.

The fifth wrapper 235 may wrap an outer periphery of the first wrapper 231, of the second wrapper 232, and of the third wrapper 233. In other words, the tobacco rod 210, the first filter segment 221 and the cooling structure 222 of the cigarette 2 may be further packaged by the fifth wrapper 235. In addition, the sixth wrapper 236 may wrap at least a part of the fifth wrapper 235 and an outer periphery of the fourth wrapper 234. In other words, the sixth wrapper 236 may further package at least a part of the cooling structure 222 and the second filter segment 223 of the cigarette 2.

The first wrapper 231, the second wrapper 232, the fifth wrapper 235, and the sixth wrapper 236 may be made of a common wrapper. For example, the first wrapper 231, the second wrapper 232, the fifth wrapper 235, and the sixth wrapper 236 may include a porous wrapper or a non-porous wrapper. For example, the first wrapper 231 may have a thickness of about 61 μm and a porosity of about 15 CU, and the second wrapper 232 may have a thickness of about 63 μm and a porosity of about 15 CU. However, embodiments of the present disclosure are not limited thereto. In addition, the fifth wrapper 235 may have a thickness of about 66 μm and a porosity of about 10 CU, and the sixth wrapper 236 may have a thickness of about 66 μm and a porosity of about 17 CU. However, embodiments of the present disclosure are not limited thereto.

In addition, an inner surface of the first wrapper 231 and/or of the second wrapper 232 may further include an aluminum foil.

The third wrapper 233 and the fourth wrapper 234 may be made of a hard wrapper. For example, the third wrapper 233 may have a thickness of about 158 μm and a porosity of about 33 CU, and the fourth wrapper 234 may have a thickness of about 155 μm and a porosity of about 46 CU. However, embodiments of the present disclosure are not limited thereto.

A certain material may be added to the fifth wrapper 235 and the sixth wrapper 236. Here, silicon may be used as an example of the certain material. However, embodiments of the present disclosure are not limited thereto. For example, silicon has characteristics such as heat resistance with little change with temperature, oxidation resistance, resistance to various chemicals, water repellency to water, or electrical insulation. However, even if it is not silicon, any material having the above-described characteristics may be applied (or coated) to the fifth wrapper 235 and the sixth wrapper 236 without limitation.

The fifth wrapper 235 and the sixth wrapper 236 may prevent the cigarette 2 from being burned. For example, when the tobacco rod 210 is heated by the heater 130, there is a possibility in that the cigarette 2 is burned. More specifically, when temperature rises above the ignition point of any one of substances included in the tobacco rod 210, the cigarette 2 may be burned. Even in that case, since the fifth wrapper 235 and the sixth wrapper 236 contain a non-combustible material, the cigarette 2 may be prevented from being burned.

In addition, the fifth wrapper 235 may prevent the holder 1 from being contaminated by materials generated from the cigarette 2. Liquids may be generated from the cigarette 2 by a user's puffing. For example, as an aerosol generated from the cigarette 2 is cooled by air from the outside, the liquids (e.g., moisture, etc.) may be generated. As the fifth wrapper 235 packages the tobacco rod 210 and/or the first filter segment 221, the liquids generated from the cigarette 2 may be prevented from leaking out of the cigarette 2. Accordingly, the inside of the holder 1 may be prevented from being contaminated by the liquids generated from the cigarette 2.

A diameter of the cigarette 2 may be within a range of 5 mm to 9 mm, and a length of the cigarette 2 may be about 48 mm. However, embodiments of the present disclosure are not limited thereto. For example, a length of the tobacco rod 210 may be about 12 mm, a length of the first filter segment 221 may be about 10 mm, a length of the cooling structure 222 may be about 14 mm, and a length of the second filter segment 223 may be about 12 mm. However, embodiments of the present disclosure are not limited thereto.

The structure of the cigarette 2 illustrated in FIG. 2 is merely an example, and some components thereof may be omitted. For example, the cigarette 2 may not include one or more of the first filter segment 221, the cooling structure 222, and the second filter segment 223.

The tobacco rod 210 includes an aerosol generating material. For example, the aerosol generating material may include at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol.

In addition, the tobacco rod 210 may contain other additives such as flavoring agents, wetting agents and/or organic acids. Examples of the flavoring agents may include licorice, sucrose, fructose syrup, isosweet, cocoa, lavender, cinnamon, cardamom, celery, fenugreek, cascarilla, sandalwood, bergamot, geranium, honey essence, rose oil, Vanilla, lemon oil, orange oil, mint oil, cinnamon, caraway, cognac, jasmine, chamomile, menthol, cinnamon, ylang-ylang, sage, spearmint, ginger, coriander, coffee, or the like. In addition, examples of the wetting agents may include glycerin, propylene glycol, or the like.

As an example, the tobacco rod 210 may be filled with a reconstituted tobacco sheet.

As another example, the tobacco rod 210 may be filled with pipe tobacco. Here, the pipe tobacco may be produced by finely cutting the reconstituted tobacco sheet.

As another example, a tobacco rod 310 may be filled with a plurality of tobacco strands shredded from the reconstituted tobacco sheet. For example, the tobacco rod 310 may be formed by combining the plurality of tobacco strands in the same direction (parallel) or randomly.

For example, the reconstituted tobacco sheet may be manufactured by the following process. First, a tobacco raw material is ground to produce slurry in which the aerosol generating material (e.g., glycerin, propylene glycol, etc.), a flavoring liquid, a binder (e.g., guar gum, xanthan gum, carboxymethyl cellulose (CMC), etc.), water, and the like are mixed, and the slurry is used to form the reconstituted tobacco sheet. When making the slurry, natural pulp or cellulose may be added thereto, and one or more binders may be mixed to be used. The tobacco strands may be produced by cutting or shredding a dried reconstituted tobacco sheet.

The tobacco raw material may include tobacco leaf pieces, tobacco stems, and/or tobacco fines generated during tobacco processing. In addition, other additives such as wood cellulose fibers may be contained in the reconstituted tobacco sheet.

5% to 40% of the aerosol generating material may be added to the slurry, and 2% to 35% of the aerosol generating material may remain in the reconstituted tobacco sheet. It is desirable that 5% to 30% of the aerosol generating material remain in the reconstituted tobacco sheet.

In addition, before a process in which the tobacco rod 210 is packaged by the first wrapper 231, the flavoring liquid such as menthol, a moisturizer, or the like may be sprayed to a center of the tobacco rod 210 to be added thereto.

The first filter segment 221 may include a cellulose acetate filter. For example, the first filter segment 221 may include a tube-shaped structure including a hollow therein. The first filter segment 221 may have an appropriate length within a range of 4 mm to 30 mm. However, embodiments of the present disclosure are not limited thereto. It is desirable that the length of the first filter segment 221 be 10 mm. However, embodiments of the present disclosure are not limited thereto.

The hollow included in the first filter segment 221 may have an appropriate diameter within a range of 2 mm to 4.5 mm. However, embodiments of the present disclosure are not limited thereto.

When the first filter segment 221 is manufactured, the content of a plasticizer may be regulated to adjust hardness of the first filter segment 221.

In addition, the first filter segment 221 may be manufactured by inserting therein (e.g., hollow) a structure such as a film or a tube made of the same or different material.

The first filter segment 221 may be made of cellulose acetate. Therefore, when the heater 130 is inserted, materials inside the tobacco rod 210 may be prevented from being pushed back, and an effect of cooling an aerosol may be generated.

The cooling structure 222 cools the aerosol generated by the heater 130 heating the tobacco rod 210. Therefore, the user may inhale the aerosol cooled to an appropriate temperature.

A length or diameter of the cooling structure 222 may be determined in various ways according to a shape of the cigarette 2. For example, the length of the cooling structure 222 may be appropriately employed from within a range of 7 mm to 20 mm. It is desirable that the length of the cooling structure 222 be about 14 mm. However, embodiments of the present disclosure are not limited thereto.

The cooling structure 222 may be manufactured by weaving polymer fibers. In that case, the flavoring liquid may be applied to the fibers made of polymer. Alternatively, the cooling structure 222 may be manufactured by weaving separate fibers onto which the flavoring liquid is applied and the fibers made of polymer together.

Alternatively, the cooling structure 222 may be formed by a crimped polymer sheet.

The polymer may be made of a material selected from the group consisting of polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polylactic acid (PLA), cellulose acetate (CA), and an aluminum foil.

As the cooling structure 222 is formed by the woven polymer fibers or the crimped polymer sheet, the cooling structure 222 may include a single or a plurality of channels extending in a longitudinal direction. Here, a channel refers to a passage through which gas (for example, air or an aerosol) passes.

For example, the cooling structure 222 made of the crimped polymer sheet may be formed from a material having a thickness between about 5 μm and about 300 μm, for example, between about 10 μm and about 250 μm. In addition, a total surface area of the cooling structure 222 may be between about 300 mm²/mm and about 1000 mm²/mm. In addition, an aerosol cooling element may be formed from a material having a specific surface area of between about 10 mm²/mg and about 100 mm²/mg.

The cooling structure 222 may include a thread containing a volatile flavor substance. Here, the volatile flavor substance may include menthol. However, embodiments of the present disclosure are not limited thereto. For example, the thread may be filled with an adequate amount of menthol to provide the cooling structure 222 with 1.5 mg or more of menthol.

The second filter segment 223 may include a cellulose acetate filter. A length of the second filter segment 223 may be appropriately employed from within a range of 4 mm to 20 mm. For example, the length of the second filter segment 223 may be about 12 mm. However, embodiments of the present disclosure are not limited thereto.

The second filter segment 223 may be manufactured by spraying the flavoring liquid thereon such that the second filter segment 223 generates a flavor. Alternatively, the separate fibers onto which the flavoring liquid is applied may be inserted into the second filter segment 223. The aerosol generated from the tobacco rod 210 is cooled when passing through the cooling structure 222, and the cooled aerosol is delivered to the user through the second filter segment 223. Thus, when a flavor element is added to the second filter segment 223, the flavor delivered to the user may last longer than before.

FIG. 3 is a cross-sectional view of a cigarette including a corrugated inner wrapper, according to an embodiment.

Referring to FIG. 3, a cigarette 300 may include the tobacco rod 310, a support segment 320, a cooling segment 330, and a mouthpiece 340. However, that is merely an example, and the cigarette 300 may further include other components in addition to the components 310 to 340 illustrated in FIG. 3, or some of the components 310 to 340 illustrated in FIG. 3 may be omitted.

According to an embodiment, the support segment 320 may be located at a downstream end of the tobacco rod 310, the cooling segment 330 may be located at a downstream end of the support segment 320, and the mouthpiece 340 may be located at a downstream end of the cooling segment 330. However, an arrangement structure of a plurality of segments constituting the cigarette 300 is not limited thereto.

The tobacco rod 310 may be made of a sheet, or a strand. In addition, the tobacco rod 310 may be made of pipe tobacco finely cut from a tobacco sheet. The tobacco rod 310 may have a cylindrical shape, and smoke and/or an aerosol may be generated as the tobacco rod 310 is heated.

The tobacco rod 310 may include additives such as aerosol generating materials, flavoring agents, wetting agents and/or organic acids, or flavoring liquids such as menthol or moisturizing agents. However, embodiments of the present disclosure are not limited thereto.

The support segment 320 may include a cellulose acetate filter. For example, the support segment 320 may include a tube-shaped structure including a hollow therein. A length of the support segment 320 may be appropriately employed from within a range of 4 mm to 30 mm. However, embodiments of the present disclosure are not limited thereto. It is desirable that the length of the support segment 320 be 10 mm. However, embodiments of the present disclosure are not limited thereto.

A diameter of the hollow included in the support segment 320 may be appropriately employed from within a range of 3 mm to 4.5 mm. However, embodiments of the present disclosure are not limited thereto. Hardness of the support segment 320 may be adjusted by regulating the content of a plasticizer when the support segment 320 is manufactured.

In order to prevent a size of the support segment 320 from decreasing over time, an outer periphery of the support segment 320 may be manufactured to be packaged by a wrapper. Accordingly, it is possible to easily couple the support segment 320 to other components.

In addition, the support segment 320 may be manufactured by inserting therein (e.g., hollow) a structure such as a film, a tube, or the like made of the same or different material.

The cooling segment 330 cools the aerosol generated as a heater heats the tobacco rod 310. Therefore, a user may inhale the aerosol cooled to an appropriate temperature when inhaling the cigarette 300.

A length or diameter of the cooling segment 330 may be determined in various ways according to a shape of the cigarette 300. For example, the length of the cooling segment 330 may be appropriately employed from within a range of 7 mm to 30 mm. It is desirable that the length of the cooling segment 330 be 14 mm. However, embodiments of the present disclosure are not limited thereto.

The cooling segment 330 may be made of pure polylactic acid, or may be made by combining polylactic acid with another degradable polymer. For example, the cooling segment 330 may be manufactured through an extrusion method or a fiber weaving method. The cooling segment 330 may be manufactured in various shapes to increase a surface area per unit area (i.e., a surface area in contact with the aerosol).

For example, the cooling segment 330 may be manufactured by weaving fibers made of polylactic acid. In that case, a flavoring liquid may be applied to the fibers made of polylactic acid. Alternatively, the cooling segment 330 may be manufactured by using separate fibers onto which the flavoring liquid is applied and the fibers made of polylactic acid together.

The mouthpiece 340 may include a cellulose acetate filter. For example, the mouthpiece 340 may be made of a recess filter. However, embodiments of the present disclosure are not limited thereto. A length of the mouthpiece 340 may be appropriately employed from within a range of 4 mm to 30 mm. For example, the length of the mouthpiece 340 may be about 12 mm. However, embodiments of the present disclosure are not limited thereto.

The mouthpiece 340 may be manufactured by spraying the flavoring liquid thereon such that the mouthpiece 340 generates a flavor. Alternatively, the separate fibers onto which the flavoring liquid is applied may be inserted into the mouthpiece 340. As the tobacco rod 310 is heated, the generated aerosol passes through the cooling segment 330 and is cooled, and the cooled aerosol is delivered to the user through the mouthpiece 340. Therefore, when a flavor element is added to the mouthpiece 340, the flavor delivered to the user may last longer than before. In addition, at least one capsule may be included in the mouthpiece 340. Here, the capsule may have a structure in which a liquid containing a spice is wrapped with a film. For example, the capsule may have a spherical or cylindrical shape.

According to an embodiment, each of the tobacco rod 310, the support segment 320, the cooling segment 330, and the mouthpiece 340 may be packaged by a separate wrapper, respectively. In addition, the entire cigarette 300 may be double-packaged by another wrapper surrounding an outer periphery of the wrappers that package each of the tobacco rod 310, the support segment 320, the cooling segment 330 and the mouthpiece 340, respectively. However, the manner in which the cigarette 300 and the components constituting the cigarette 300 are packaged by wrappers is not limited thereto.

Referring to FIG. 3, the mouthpiece 340 may be double-packaged. More specifically, a cellulose acetate 341 of the mouthpiece 340 may be packaged by a corrugated inner wrapper 342, and the corrugated inner wrapper 342 may be packaged by an outer wrapper 343.

Due to corrugations of the corrugated inner wrapper 342, a passage 344 through which the aerosol passes may be formed between the corrugated inner wrapper 342 and the outer wrapper 343 configured to wrap the corrugated inner wrapper 342. That is, the passage 344 through which the aerosol passes may be formed around a circumferential surface of the mouthpiece 340 by the corrugated inner wrapper 342.

The aerosol that has been generated as the tobacco rod 310 is heated passes through the plurality of segments (e.g., the support segment 320, the cooling segment 330, and mouthpiece 340) in sequence, and is delivered to the user. When the user inhales the cigarette 300, an adequate amount of aerosol may not be delivered to the user, due to resistance-to-draw (RTD) from the plurality of segments constituting the cigarette 300. According to one or more embodiments of the present disclosure, the passage 344 is formed between the corrugated inner wrapper 342 configured to wrap the cellulose acetate 341 of the mouthpiece 340, and the outer wrapper 343 configured to wrap the corrugated inner wrapper 342, and the aerosol passes through the passage 344 to be delivered to the user, thus increasing the amount of aerosol transfer.

According to an embodiment, a width between the corrugations of the corrugated inner wrapper 342 may be 0.1 mm to 5 mm, and a depth of the corrugations may be 0.1 mm to 5 mm. It is desirable that the width between the corrugations of the corrugated inner wrapper 342 be 1 mm to 3 mm, and the depth of the corrugations be 0.3 mm to 1 mm.

In addition, the corrugations of the corrugated inner wrapper 342 may be formed by a stamping roller. The width between the corrugations of the corrugated inner wrapper 342 and the depth of the corrugations of the corrugated inner wrapper 342 may vary according to a width between uneven portions of the stamping roller, a depth of the uneven portions of the stamping roller, and stamping intensity of the stamping roller.

The outer wrapper 343 may wrap only the mouthpiece 340, or may wrap at least another segment (for example, the cooling segment 330) that constitutes the cigarette 300 and the mouthpiece 340 at the same time to couple mouthpiece 340 to other segments.

FIG. 4 is a cross-sectional view of a mouthpiece including a corrugated inner wrapper, according to an embodiment.

Referring FIG. 4, a mouthpiece 400 may include a cellulose acetate 410, a corrugated inner wrapper 420, and an outer wrapper 430. As illustrated in FIG. 4, the corrugated inner wrapper 420 may package the cellulose acetate 410 in a form surrounding an outer periphery of the cellulose acetate 410. In addition, since the corrugated inner wrapper 420 is packaged by the outer wrapper 430, the mouthpiece 400 may be double-packaged.

Due to corrugations of the corrugated inner wrapper 420, a passage through which an aerosol passes may be formed between the corrugated inner wrapper 420 and the outer wrapper 430 configured to wrap the corrugated inner wrapper 420. In other words, the passage through which the aerosol passes may be formed around a circumferential surface of the mouthpiece 400 by the corrugated inner wrapper 420.

The aerosol that has been generated as an aerosol generating material is heated passes not only a passage inside the cellulose acetate 410, but also the passage formed between the corrugated inner wrapper 420 and the outer wrapper 430 to be delivered to a user, thus increasing the amount of aerosol transfer.

The corrugations of the corrugated inner wrapper 420 may be formed by a stamping roller, and a width 421 between the corrugations and a depth 422 of the corrugations of the corrugated inner wrapper 420 may be determined according to a width between and a depth of the uneven portions of the stamping roller, stamping intensity, and the like.

According to an embodiment, the width 421 between the corrugations of the corrugated inner wrapper 420 may be 0.1 mm to 5 mm, and the depth 422 of the corrugations of the corrugated inner wrapper 420 may be 0.1 mm to 5 mm. It is desirable that the width 421 between the corrugations of the corrugated inner wrapper 420 be 1 mm to 3 mm, and the depth 422 of the corrugations of the corrugated inner wrapper 420 be 0.3 mm to 1 mm.

A cross section of the corrugations of the corrugated inner wrapper 420 is not limited to the example illustrated in FIG. 4. The cross section of the corrugations of the corrugated inner wrapper 420 may have a polygonal shape such as a triangle, a square, and a trapezoid, or a semicircular shape.

FIG. 5 is a cross-sectional view of a cigarette including a perforated cooling segment, according to an embodiment.

Referring to FIG. 5, a cigarette 500 may include a tobacco rod 510, a support segment 520, a cooling segment 530, and a mouthpiece 540. However, that is merely an example, and the cigarette 500 may further include other components in addition to the components 510 to 540 illustrated in FIG. 5, or some of the components 510 to 540 illustrated in FIG. 5 may be omitted.

Hereinafter, for ease of description, descriptions overlapping with FIG. 3 will be omitted.

A perforation 531 may be formed in at least a portion of the cooling segment 530. According to an embodiment, the perforation 531 may be formed at a position separated by 5 mm to 25 mm from a downstream end of the cooling segment 530 toward an upstream. It is desirable that the perforation 531 be formed at a position separated by 15 mm to 20 mm from the downstream end of the cooling segment 530 toward the upstream. The perforation 531 may include 4 to 10 holes, and for example, the perforation 531 may include 4, 6, or 8 holes. However, the position of the perforation 531 and the number of the holes constituting the perforation 531 are not limited thereto.

When a user inhales the cigarette 500, air may flow into the cooling segment 530 from the outside through the perforation 531 to move toward the mouthpiece 540. The air flowing in from the outside through the perforation 531 may join air flowing in from an end of the tobacco rod 510.

Some of the air flowing in from the outside through the perforation 531 may be delivered to the user through a passage formed inside a cellulose acetate of the mouthpiece 540, and other of the air flowing in from the outside through the perforation 531 may be delivered to the user through a passage formed between a corrugated inner wrapper and an outer wrapper of the mouthpiece 540.

When the user inhales the cigarette 500, not only the air flowing in from the end of the cigarette rod 510 but also the air flowing in through the perforation 531 of the cooling segment 530 is delivered to the user, thus increasing the amount of aerosol transfer.

FIG. 6 is a cross-sectional view of a cigarette including a corrugated inner wrapper, according to another embodiment.

Referring to FIG. 6, a cigarette 600 may include a tobacco rod 610, a first support segment 620, a second support segment 630, and a mouthpiece 640. However, that is merely an example, and the cigarette 600 may further include other components in addition to the components 610 to 640 illustrated in FIG. 6, or some of the components 610 to 640 illustrated in FIG. 6 may be omitted.

Hereinafter, for ease of description, descriptions overlapping with FIG. 3 will be omitted.

According to an embodiment, the first support segment 620 may be located at a downstream end of the tobacco rod 610, the second support segment 630 may be located at a downstream end of the first support segment 620, and the mouthpiece 640 may be located at a downstream end of the second support segment. However, an arrangement structure of a plurality of segments constituting the cigarette 600 is not limited thereto.

The first support segment 620 and the second support segment 630 may include a tube-shaped structure including a hollow therein. An inner diameter of the second support segment 630 may be larger than an inner diameter of the first support segment 620. According to an embodiment, a diameter of the first support segment 620 may be 7 mm to 9 mm, and the inner diameter of the first support segment 620 may be about 2.0 mm to about 4.5 mm. A diameter of the second support segment 630 may be 7 mm to 9 mm, and the inner diameter of the second support segment 630 may be about 3.0 mm to about 5.5 mm, for example, the inner diameter of the second support segment 630 may be 4.0 mm.

The inner diameter of the second support segment 630 is larger than the inner diameter of the first support segment 620, so that air passing through a hollow of the first support segment 620 may flow into a hollow of the second support segment 630, and may be diffused. The air that moves from the hollow of the first support segment 620 toward the hollow of the second support segment 630 and is diffused may have an increased contact surface area and an increased contact time with air flowing in from the outside through perforations 631 as the deflection in a downstream direction of the cigarette 600 decreases. Accordingly, an effect of cooling may be increased.

The perforations 631 may be formed in at least a portion of the second support segment 630. The hollow inside the second support segment 630 may be surrounded by a wall made of cellulose acetate, and the perforations 631 may be formed on the wall made of cellulose acetate.

According to an embodiment, the perforations 631 may be formed at a position separated by 5 mm to 25 mm from a downstream end of the second support segment 630 toward an upstream. It is desirable that the perforations 631 be formed at a position separated by 15 mm to 20 mm from the downstream end of the second support segment 630 toward the upstream. In addition, the perforations 631 may include 4 to 10 holes, for example, the perforations 631 may include 4, 6, or 8 holes. However, the position of the perforations 631 and the number of the holes constituting the perforations 631 are not limited thereto.

When a user inhales the cigarette 600, air may flow into the hollow of the second support segment 630 from the outside through the perforations 631 to move toward the mouthpiece 640. The air flowing in from the outside through the perforations 631 may join air flowing in from an end of the tobacco rod 610.

Some of the air flowing in from the outside through the perforations 631 may be delivered to the user through a passage formed inside the cellulose acetate of the mouthpiece 640, and other of the air flowing in from the outside through the perforations 631 may be delivered to the user through a passage formed between a corrugated inner wrapper and an outer wrapper of the mouthpiece 640.

When the user inhales the cigarette 600, not only the air flowing in from the end of the cigarette rod 610, but also the air flowing in through the perforations 631 of the second support segment 630 is delivered to the user, thus increasing the amount of aerosol transfer.

Those of ordinary skill in the art related to the present embodiments may understand that various changes in form and details can be made therein without departing from the scope of the characteristics described above. The disclosed methods should be considered in a descriptive sense only and not for purposes of limitation. The scope of the present disclosure is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present disclosure.

Claims

1. A cigarette comprising:

a tobacco rod;

a support segment located at a downstream end of the tobacco rod;

a cooling segment located at a downstream end of the support segment; and

a mouthpiece located at a downstream end of the cooling segment,

wherein the cigarette

further comprises a corrugated inner wrapper configured to wrap the mouthpiece and an outer wrapper configured to wrap the corrugated inner wrapper.

2. The cigarette of claim 1, wherein a passage through which an aerosol passes is formed between the corrugated inner wrapper and the outer wrapper.

3. The cigarette of claim 1, wherein a width between corrugations of the corrugated inner wrapper is 1 mm to 3 mm, and a depth of the corrugations of the corrugated inner wrapper is 0.3 mm to 1 mm.

4. The cigarette of claim 1, wherein the corrugations of the corrugated inner wrapper are formed by a stamping roller.

5. The cigarette of claim 1, wherein air flows into the cooling segment from the outside through perforations formed in at least a portion of the cooling segment.

6. The cigarette of claim 1, wherein the outer wrapper wraps the cooling segment, and

the perforations are formed through the outer wrapper and the cooling segment such that air flows into the cooling segment from the outside through the perforations.

7. A cigarette comprising:

a tobacco rod;

a first support segment located at a downstream end of the tobacco rod;

a second support segment that is located at a downstream end of the first support segment and has an inner diameter larger than an inner diameter of the first support segment; and

a mouthpiece located at a downstream end of the second support segment,

wherein the cigarette

further comprises a corrugated inner wrapper configured to wrap the mouthpiece and an outer wrapper configured to wrap the corrugated inner wrapper.

8. The cigarette of claim 7, wherein air flows into the second support segment from the outside through perforations formed in at least a portion of the second support segment.

9. The cigarette of claim 8, wherein the outer wrapper wraps the second support segment, and

the perforations are formed through the outer wrapper and the second support segment such that air flows into the second support segment from the outside through the perforations.