Aerosol cooling material for cigarette and smoking article comprising same

Abstract

The present invention relates to an aerosol cooling material for cigarettes, which comprises a metal having a thermal conductivity of 10 W / m.K to 5000 W / m.K and is made of a porous foam or a porous sheet.

Description

Technical Field

[0001] The present invention relates to an aerosol cooling material for cigarettes and a smoking product comprising the aerosol cooling material. Background Art

[0002] When a user inhales the aerosol generated by heating the medium portion of a smoking article, the aerosol may feel very hot, especially during the first puff (the temperature during the first puff is 65°C to 75°C), which may make the smoker feel uncomfortable. This phenomenon is caused by the water vapor generated when the medium portion is heated.

[0003] Existing methods to address this issue include perforating the smoking article's wrapper, using absorbent materials, or incorporating a cooling element (containing polylactic acid (PLA) with a low glass transition temperature) into the smoking article. However, perforating the smoking article's wrapper increases the dilution rate of the aerosol and can also lead to problems with inhalation. Using absorbent materials reduces the amount of water vapor in the aerosol, reducing the amount of atomization. Furthermore, even when a cooling element containing polylactic acid is incorporated into a smoking article, the aerosol cooling effect remains insignificant.

[0004] Therefore, there is a need to develop a smoking article that can reduce the temperature of the aerosol generated from the medium portion without reducing the amount of atomization. Summary of the Invention

[0005] Problems to be solved by the invention

[0006] An object of the present invention is to provide a cooling material that can reduce the temperature of aerosol generated by heating a medium portion of a smoking article as it passes through the smoking article, while minimizing the space for condensation of water vapor.

[0007] However, the technical problems to be solved by the present invention are not limited to the above-mentioned subjects, and other unmentioned subjects will be clearly understood by ordinary technicians in this field through the following description.

[0008] Means used to solve problems

[0009] According to one embodiment of the present invention, an aerosol cooling material for cigarettes is provided, which comprises a metal having a thermal conductivity of 10 W / m·K (watts / meter·degree) to 5000 W / m·K and is made of porous foam or porous sheet.

[0010] According to another embodiment of the present invention, there is provided a smoking article comprising a media portion and a filter portion, wherein the smoking article comprises an aerosol-cooling material for cigarettes, wherein the aerosol-cooling material for cigarettes comprises a metal having a thermal conductivity of 10 W / m·K to 5000 W / m·K and is made of a porous foam or a porous sheet.

[0011] Effects of the Invention

[0012] The cooling material of the present invention is made of porous foam or sheet material, formed into a disk of a certain thickness. The cooling material, which includes a metal with good thermal conductivity, can reduce the temperature of the aerosol generated by the medium portion without significantly changing the inhalation resistance of the smoking article or losing water vapor. This provides a smoking article that prevents problems such as lack of inhalation after puffing or reduced atomization volume, while also alleviating the burning sensation during the first puff.

[0013] It should be understood that the effects of the present invention are not limited to the above effects, but also include all effects that can be derived from the detailed description of the present invention or the invention described in the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a diagram of the control volume of the medium portion of the smoking article model.

[0015] Figure 2 This is a diagram of the cooling unit of the smoking article model.

[0016] Figure 3 This is a diagram of the filter portion of a smoking article model.

[0017] Figure 4 This is a graph showing the results of measuring the temperature of mainstream smoke during the first puff of a smoking article model at different vapor densities.

[0018] Figure 5 This is a graph showing the results of measuring the temperature of the mainstream smoke during the first puff at different heat capacities of the porous medium 1 of the cooling portion.

[0019] Figure 6 This is a graph showing the results of measuring the temperature of mainstream smoke during the first puff at different cooling section lengths.

[0020] Figure 7 This is a graph showing the results of measuring the temperature of mainstream smoke during the first puff at different filter lengths.

[0021] Figure 8 This is a graph showing the results of measuring the temperature of mainstream smoke during the first puff at different cooling section inner diameters.

[0022] Figure 9 This is a graph showing the results of measuring the temperature of mainstream smoke during the first puff at different cooling unit outer diameters.

[0023] Figure 10 This graph shows the results of measuring the temperature of the mainstream smoke during the first puff under different cooling unit heat transfer coefficients.

[0024] Figure 11 This graph shows the results of measuring the temperature of mainstream smoke during the first puff at different filter section thermal conductivities.

[0025] Figure 12 is a side view of a smoking article in which cooling material is included in a dual filter according to an embodiment of the present invention.

[0026] Figure 13 is a side view of a smoking article in which cooling material is included in a triple filter according to an embodiment of the present invention.

[0027] Figure 14 is a side view of a smoking article in which cooling material is included in a cooling portion according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following embodiments are described in detail with reference to the accompanying drawings. However, various modifications may be made to the embodiments, and the scope of the present application is not limited to or by these embodiments. All modifications, equivalents, and alternatives to the embodiments are intended to be included within the scope of the present application.

[0029] The terms used in the embodiments are for illustrative purposes only and should not be construed as limiting. Unless the context clearly indicates otherwise, a single quantity statement also includes a plurality of quantities. In this specification, terms such as "including" or "having" are used to specify the presence of features, numbers, steps, stages, actions, constituent elements, components, or combinations thereof described in the specification, and should be understood as not excluding the presence or additional possibility of one or more other features, numbers, steps, stages, actions, constituent elements, components, or combinations thereof.

[0030] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the ordinary meanings understood by persons of ordinary skill in the art to which they pertain. Commonly used terms, as defined in dictionaries, should be understood as having the meanings inherent in the relevant technical context and should not be interpreted as idealizing or formalizing the meanings of terms not explicitly defined in this specification.

[0031] In addition, in the process of describing the examples with reference to the drawings, the same reference numerals are used for the same components and repeated descriptions are omitted. In the process of describing the example embodiments, when it is judged that the detailed description of the relevant well-known structures or functions will unnecessarily obscure the present disclosure, the detailed description is omitted.

[0032] Furthermore, when describing the components of the embodiments, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish one component from other components and are not used to limit the nature, order, or sequence of the corresponding components.

[0033] When a component has the same function as a component of a certain embodiment, the same name is used to describe it in the other embodiments. Unless a counterexample is mentioned, the description of a certain embodiment can be applied to other embodiments, and the detailed description of the repeated content can be omitted.

[0034] Throughout the specification, when it is stated that a certain part “includes” a certain constituent element, other constituent elements may also be included rather than excluding the possibility of the existence of other constituent elements.

[0035] Throughout this specification, "smoking articles" may refer to articles that can generate aerosols, such as cigarettes (cigarettes), cigars, etc. Smoking articles may include an aerosol-generating substance or an aerosol-forming substrate. In addition, smoking articles may include solid materials based on tobacco raw materials such as tobacco leaves, cut tobacco, and reconstituted tobacco. Smoking articles may also include volatile compounds.

[0036] In addition, throughout the specification, "upstream" or "upstream direction" refers to the direction away from the mouth of a user who inhales a smoking article; "downstream" or "downstream direction" refers to the direction close to the mouth of a user who inhales a smoking article.

[0037] During the first puff of a smoking article, excessive heat in the mainstream smoke is caused by the moisture contained in the aerosol generated by the media. To alleviate this issue, the first puff temperature was measured while adjusting the vapor density in the smoking article, the heat capacity of the porous media in the cooling section, the length of the cooling section, the length of the filter section, the inner diameter of the cooling section, the outer diameter of the cooling section, the heat transfer coefficient of the cooling section, and the thermal conductivity of the filter section.

[0038] In order to study the process of water vaporization and steam formation in the medium, the following Figure 1 The control volume of the dielectric part is set in the manner shown. At this time, it is assumed that the temperature, density and velocity inside the control volume are constant and not affected by position.

[0039] On the other hand, in order to study the cooling process of the steam in the cooling part, the following Figure 2 The cooling section is set in the manner shown. The cooling section is made of porous medium 1 and formed into a tube. It is assumed that the porous medium tube is a lumped system with a constant temperature at all locations. The inner diameter r1 of the porous medium tube is 2.5 mm, the outer diameter r2 is 3.5 mm, and the length l of the cooling section is 1. c It is 12mm.

[0040] In order to study the cooling process of the steam in the filter, the following Figure 3The filter portion is provided in the manner shown. The filter portion may be in the form of a porous medium 2 wrapped with paper. The length l of the filter portion ac The inner diameter r of the paper wrapping the porous medium 2 is 14 mm. p1 3.4mm, outer diameter r p2 3.5mm.

[0041] Figures 4 to 11 The figure shows the measurement results of the temperature of the mainstream smoke during the first puff of the smoking article under different vapor densities, heat capacity of the porous medium 1 of the cooling portion, length of the cooling portion, length of the filter portion, inner diameter of the cooling portion, outer diameter of the cooling portion, heat transfer coefficient of the cooling portion, and thermal conductivity of the filter portion.

[0042] The values of the vapor density, heat capacity of the porous medium 1 of the cooling part, the length of the cooling part, the length of the filter part, the inner diameter of the cooling part, the outer diameter of the cooling part, the heat transfer coefficient of the cooling part, the thermal conductivity of the filter part, and the temperature of the vapor that finally reaches the smoker of the currently used smoking articles are shown in Table 1. Figures 4 to 11 Indicated by an asterisk.

[0043] Table 1

[0044] Characteristics of smoking products value <![CDATA[Steam density (kg / m 3 )]]> 227.3 <![CDATA[Heat capacity (J / m 3 ·K) of the porous medium 1 in the cooling section]]> 171600 Length of cooling section (mm) 12 Filter length (mm) 14 Inner diameter of cooling section (mm) 2.5 Cooling section outer diameter (mm) 3.5 <![CDATA[Heat transfer coefficient of the cooling section (W / m 2 ·K)]]> 68.5 Thermal conductivity of filter part (W / m·K) 0.058 Final steam temperature (℃) 130.2

[0045] In light of the above results, it is anticipated that the temperature of the mainstream smoke during the first puff can be reduced by increasing the length of the cooling portion of the smoking article, increasing the length of the filter portion, increasing the outer diameter of the cooling portion, improving the heat transfer coefficient of the cooling portion, or increasing the thermal conductivity of the filter portion. In particular, increasing the thermal conductivity of the filter portion of currently used smoking articles is most effective in reducing the temperature of the mainstream smoke during the first puff.

[0046] Therefore, as one embodiment of the present invention, an aerosol-cooling material for cigarettes is provided, comprising a metal having a thermal conductivity of 10 W / m·K to 5000 W / m·K and made of a porous foam or porous sheet. In other words, by using a cooling material comprising a high-thermal-conductivity metal in a smoking article, the temperature of the aerosol generated from the medium portion can be effectively reduced.

[0047] As long as the thermal conductivity satisfies the above range, any metal can be used. For example, the metal can be at least one selected from the group consisting of aluminum (about 237 W / m·K), copper (about 372 W / m·K), stainless steel (about 12 W / m·K to 45 W / m·K), gold (about 295 W / m·K), silver (about 418 W / m·K), iron (about 72 W / m·K), and graphene (about 5000 W / m·K), but the embodiment is not limited thereto.

[0048] In the cooling material according to one embodiment of the present invention, the porous foam can be a disc-shaped structure having a certain thickness. This structure is more conducive to preventing condensation of water in the aerosol generated by the dielectric portion because, compared to a conventional cooling portion made by longitudinally folding a sheet, the disc-shaped structure with a certain thickness provides less space for water to condense when it encounters the cooling portion.

[0049] On the other hand, the porous sheet may be a metal nonwoven fabric or a metal fabric made of metal strands. The porous sheet is applied after crimping.

[0050] On the other hand, in terms of maintaining the atomization amount, inhalation resistance, and excellent cooling effect of the smoking article, porous foam is preferred over porous sheet.

[0051] The aerosol-cooling material for cigarettes according to an embodiment of the present invention may have a porous property so that the aerosol generated from the medium portion can move into the smoker's mouth through the pores.

[0052] At this time, the porosity of the cigarette aerosol cooling material can be 60% to 90%, preferably 80% to 90%. At the same time, the porosity of the porous sheet can be 70,000 CU or more, and the porosity of the cigarette aerosol cooling material applied by curling the porous sheet can be within the above range. When the porosity and porosity are lower than the lower limit of the above range, the inhalation resistance will be increased, hindering the flow of mainstream smoke, resulting in the situation that the smoke cannot be inhaled or cannot be smoked after drawing. On the other hand, when the porosity and porosity exceed the upper limit of the above range, the space occupied by the metal is small, and it is difficult for the high-temperature steam to contact the metal, resulting in the problem of not being able to effectively reduce the temperature of the mainstream smoke.

[0053] The basis weight of the aerosol cooling material for cigarettes according to one embodiment of the present invention can be 40 g / cm 3 (g / cm3) to 80g / cm 3 When the basis weight is less than 40g / cm 3 When the thickness of the cooling material is reduced, the operability of manufacturing the smoking article is reduced. On the other hand, when the basis weight exceeds 80g / cm 3 When the cooling material is thicker and the porosity is reduced, the airflow is blocked, resulting in increased suction resistance.

[0054] According to one embodiment of the present invention, the length of the aerosol cooling material for cigarettes can be between 3 mm and 10 mm. If the length is less than 3 mm, the contact area with the cooling material is reduced, and the temperature of the mainstream smoke during the first puff cannot be sufficiently reduced. On the other hand, if the length exceeds 10 mm, the entire filter unit must be replaced with the cooling material, which may result in a reduced aesthetic appearance and excessive cooling. Furthermore, the increased suction resistance may make it difficult to draw or impossible to smoke.

[0055] In another embodiment of the present invention, a smoking article comprising a media portion and a filter portion may be provided, wherein the smoking article includes a cigarette aerosol-cooling material. In this case, the cigarette aerosol-cooling material may include a metal having a thermal conductivity of 10 W / m·K to 5000 W / m·K and may be made of a porous foam or a porous sheet.

[0056] Examples of smoking articles of the present invention include combustion-type and non-combustion-type smoking articles. Combustion-type smoking articles may refer to traditional cigarettes. Non-combustion-type smoking articles may refer to smoking articles that are indirectly heated by electrical energy rather than directly burned.

[0057] The medium portion may contain an aerosol-generating material, which is used to release volatile compounds after heating. The aerosol-generating material typically includes a nicotine-containing tobacco material and may further include an excipient such as a binder or other additives. For example, the tobacco medium contained in the cigarette rod of the present invention may be in the form of particles containing the tobacco material and an excipient. For example, the tobacco material may be tobacco leaves, tobacco stems, tobacco dust produced during tobacco processing, and / or tobacco leaf strips. The tobacco leaf may be at least one of yellow tobacco leaves, burley tobacco leaves, oriental tobacco leaves, cigar leaves, and flue-cured tobacco leaves. However, the present invention is not limited to these examples.

[0058] The filter section may be located downstream of the media section and may be a cellulose acetate filter, a paper filter, or a filter composed of a polymer material. However, the present invention is not limited to the examples described.

[0059] In a smoking article according to an embodiment of the present invention, the filter portion may include the cigarette aerosol-cooling material and may be composed of a single or multiple filter segments. For example, the filter composed of multiple filter segments may be a double filter or a triple filter.

[0060] The smoking article according to an embodiment of the present invention may further include a cooling portion between the medium portion and the filter portion, wherein the cooling portion can be used to cool the aerosol generated by the heated medium portion so that the smoker can inhale the aerosol cooled to an appropriate temperature.

[0061] The cooling portion may include a biodegradable material or a natural polymer material. For example, the cooling portion may use polylactic acid, and the content of the polylactic acid may be 30% to 100%.

[0062] An example of the cooling portion may be a tubular structure having a hollow interior. When the aerosol moves in the hollow interior, the temperature of the aerosol may be reduced by perforations, water-absorbing materials, cooling materials, and the like.

[0063] The cooling portion may include a cigarette aerosol cooling material to maximize the cooling effect of the aerosol.

[0064] The mainstream smoke temperature of a smoking article according to an embodiment of the present invention may be 40° C. to 65° C. Compared with the mainstream smoke temperature of a smoking article without cooling material, the mainstream smoke temperature of the smoking article may be reduced by 5° C. to 25° C.

[0065] The moisture content of the smoking article according to an embodiment of the present invention can be 3 mg / cig (milligrams per cigarette) to 8 mg / cig. Typically, the moisture content of the medium portion of the smoking article can be 4.7 mg / cig to 7.4 mg / cig, which also applies to the smoking article according to an embodiment of the present invention. Since the cooling material does not absorb moisture due to its material properties, and the aerosol moves rapidly within the cooling material, the possibility of moisture remaining due to absorption is very low. Therefore, the moisture in the aerosol generated by the medium portion of the provided smoking article will hardly condense, and the atomization amount will not change.

[0066] The inhalation resistance of the smoking article according to one embodiment of the present invention is 98 mmH2O to 102 mmH2O. Compared with the inhalation resistance of a smoking article without a cooling material, the difference in inhalation resistance is at most 6 mmWG, which is very small. In other words, even if a cooling material is used in the provided smoking article, the inhalation resistance is not significantly reduced.

[0067] Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited to the following examples.

[0068] Experimental Example 1: Measuring the temperature of mainstream smoke during the first puff based on the cooling unit material and the presence or absence of perforations

[0069] 1. Manufacturing of smoking products

[0070] Comparative Example 1

[0071] A smoking article was manufactured, comprising a media portion and a filter portion, the filter portion further comprising tip paper (without perforations) wrapping the filter portion.

[0072] Comparative Example 2

[0073] It was manufactured in the same manner as Comparative Example 1, except that the tipping paper was perforated.

[0074] Comparative Example 3

[0075] The smoking article was manufactured in the same manner as Comparative Example 1, except that the smoking article further included a cooling portion between the medium portion and the filter portion, the cooling portion being made of a paper filter material (water-absorbing material) and having perforations on the tipping paper.

[0076] Comparative Example 4

[0077] The smoking article was manufactured in the same manner as Comparative Example 1, except that the smoking article further included a cooling portion between the medium portion and the filter portion, the cooling portion being a paper tube and having a length of 12 mm.

[0078] Comparative Example 5

[0079] The smoking article is manufactured in the same manner as in Comparative Example 1, except that the smoking article further includes a cooling portion between the medium portion and the filter portion, and the cooling portion is formed by cutting a material of polylactic acid (PLA) laminated paper (thickness 15 μm) covered on 24K porous paper into 12 mm lengths and curling it.

[0080] Comparative Example 6

[0081] The smoking article was manufactured in the same manner as in Comparative Example 1, except that the smoking article further included a cooling portion between the medium portion and the filter portion, wherein the cooling portion was formed by cutting a polylactic acid (PLA) laminated paper (thickness 15 μm) coated with silver foil (basis weight 35 gsm) into 12 mm lengths and curling the resulting material.

[0082] Comparative Example 7

[0083] The smoking article was manufactured in the same manner as Comparative Example 1, except that the smoking article further included a cooling portion between the medium portion and the filter portion, wherein the cooling portion was formed by cutting aluminum foil into 12 mm lengths and curling the aluminum foil.

[0084] 2. Measure the temperature of the mainstream smoke during the first puff

[0085] The mainstream smoke temperature during the first puff of Comparative Examples 1 to 7 was measured using the following method. A thermocouple was fixed 1 to 2 mm from the center of the filter portion of the smoking article. After preheating the smoking article for 35 seconds using a smoking profiler, the maximum temperature was measured between 35 and 37 seconds into the puff. The results are shown in Table 2 below.

[0086] Table 2

[0087]

[0088]

[0089] Compared to Comparative Example 1, in Comparative Examples 4 to 7, in which the cooling portion was applied to the smoking article, the temperature of the mainstream smoke during the first puff was reduced by approximately 43°C. A comparison of Comparative Examples 4 to 7 shows that regardless of whether the cooling portion was made of paper, polylactic acid, or aluminum foil, the temperature during the first puff remained constant between 85°C and 90°C during use of the smoking article. Therefore, the first puff temperature did not significantly change due to material changes.

[0090] On the other hand, the first puff temperature in Comparative Example 2 was lower by over 60°C compared to Comparative Example 1, and by approximately 20°C compared to Comparative Examples 4 to 7. This suggests that providing perforations in the smoking article is more effective in reducing the temperature of the mainstream smoke during the first puff than changing the material of the cooling portion. However, Comparative Example 2 suffers from an air dilution rate as high as 65% compared to Comparative Example 1, which can reduce the cigarette's flavor and cause a lack of inhalation after the puff.

[0091] Comparative Example 3 uses both perforations and water-absorbing materials, and the first puff temperature is reduced by about 20°C compared to Comparative Example 2. However, due to the use of water-absorbing materials, the vapor density is reduced by 30% compared to Comparative Example 2, which poses a problem of reduced atomization amount.

[0092] Experimental Example 2: Measuring the temperature, atomization volume, and inhalation resistance of the mainstream smoke during the first puff using a cigarette aerosol cooling material

[0093] 1. Make cooling materials

[0094] (1) Design of porous aluminum foam cooling material

[0095] The design contents of the porous aluminum foam cooling material are shown in Table 3 below.

[0096] Table 3

[0097] Length (mm) Porosity (%) <![CDATA[Inspiratory resistance (mmH2O)]]> 4 to 8 0.6 or above Below 10

[0098] (2) Manufacturing cooling materials composed of porous aluminum non-woven fabrics

[0099] The aluminum nonwoven cooling material was manufactured as follows. First, a porous nonwoven filter made of polypropylene fibers was immersed in an aluminum precursor ink containing 15 mM AlCl₃ and 53 mM LiAlH₄. After drying, the aluminum nonwoven fabric was formed. The cooling material was then formed by crimping the aluminum nonwoven fabric. The physical properties of the resulting cooling material are shown in Table 4 below.

[0100] Table 4

[0101]

[0102] 2. Manufacturing of smoking products

[0103] Example 1

[0104] A smoking article is manufactured, which includes: a medium portion; a cooling portion 10 located downstream of the medium portion; and a filter portion 14 located downstream of the cooling portion. In this case, the filter portion is a double filter, and the double filter includes a cooling material 16, which is a porous foam aluminum cooling material ( Figure 12 The filter portion includes a plugging paper wrapped therein. The plugging paper is formed with perforations.

[0105] Example 2

[0106] The same method as in Example 1 is used for manufacturing. The difference is that the filter section 24 located downstream of the cooling section 20 is a triple filter, and the triple filter includes a cooling material 26, which is a porous foam aluminum cooling material ( Figure 13 )

[0107] Example 3

[0108] The same method as in Example 1 is used for manufacturing, except that the cooling part 30 is composed of two cooling sections, the cooling part 30 includes a cooling material 36, and the cooling material 36 is a porous foam aluminum cooling material. The filter part 34 composed of a single filter section is located downstream of the cooling part ( Figure 14 ).

[0109] Example 4

[0110] The same method as in Example 1 was used, except that a porous aluminum non-woven cooling material was used instead of a porous aluminum foam cooling material, and the cooling material was crumpled and used ( Figure 12 ).

[0111] Example 5

[0112] The same method as in Example 2 was used, except that a porous aluminum non-woven cooling material was used instead of a porous aluminum foam cooling material, and the cooling material was crumpled and used ( Figure 13 ).

[0113] Example 6

[0114] The same method as in Example 3 was used, except that a porous aluminum non-woven cooling material was used instead of a porous aluminum foam cooling material, and the cooling material was crumpled and used ( Figure 14 ).

[0115] 3. Measure the temperature of the mainstream smoke during the first puff

[0116] The following method was used to measure the mainstream smoke temperature during the first puff of Examples 1 to 6. A thermocouple was fixed 1 to 2 mm from the center of the filter portion of the smoking article. After preheating the smoking article for 35 seconds using a smoking profiler, the maximum temperature was measured between 35 and 37 seconds into the puff.

[0117] The results are shown in Table 5 below.

[0118] Table 5

[0119]

[0120] The results of Examples 1 to 4 and 6 show that the temperature of the mainstream smoke during the first puff was reduced by 2.1°C to 18.5°C compared to Comparative Example 2.

[0121] Furthermore, under the same conditions, the temperatures of the mainstream smoke during the first puff of Examples 1 to 3 were lower than those of Examples 4 to 6, respectively. This demonstrates that the cooling material made of porous foam is more effective in lowering the aerosol temperature than the cooling material made of porous sheet.

[0122] On the other hand, in Comparative Example 3, which included a cooling portion containing a water-absorbing material, the temperature of the mainstream smoke during the first puff was significantly reduced, similar to Examples 1 to 6. However, due to the presence of the water-absorbing material, the moisture content during the first puff was lower than in Examples 1 to 6, significantly reducing the amount of atomization.

[0123] Furthermore, the comparison of the inhalation resistance of Examples 1 to 6 after the perforations were blocked with that of Comparative Example 1 confirms that the cooling material of the present invention does not affect the inhalation resistance of the smoking article.

[0124] From the above experimental examples, it can be predicted that by using a smoking article containing the cooling material described in the technical solution of the present invention, a smoking article can be provided that can effectively reduce the aerosol temperature generated by the medium part without causing the problems of reduced atomization amount and reduced inhalation resistance.

[0125] As described above, although the embodiments are described with limited drawings, those skilled in the art can make various technical modifications and variations based on the embodiments. For example, the above-mentioned techniques can achieve appropriate effects even if they are performed in a different order from the described methods, and / or the described systems, structures, devices, circuits, etc. are combined or combined in a manner different from that described, or replaced or substituted with other components or equivalents.

[0126] Therefore, other implementations, other embodiments and contents equivalent to the claims belong to the appended claims.

[0127] Description of Reference Numerals

[0128] 10, 20, 30: Cooling section

[0129] 14, 24, 34: Filter section

[0130] 16, 26, 36: Cooling material

Claims

1. An aerosol cooling material for cigarettes, characterized in that: Contains metals having a thermal conductivity of 10 W / m·K to 5000 W / m·K, And made of porous foam or porous sheet.

2. The aerosol cooling material for cigarettes according to claim 1, characterized in that The porous foam is disk-shaped.

3. The aerosol cooling material for cigarettes according to claim 1, characterized in that The porous sheet is made of metal non-woven fabric or metal fabric.

4. The aerosol cooling material for cigarettes according to claim 1, characterized in that The porous sheet is rolled and then applied.

5. The aerosol cooling material for cigarettes according to claim 1, characterized in that The metal is at least one selected from the group consisting of aluminum, copper, stainless steel, gold, silver, iron, and graphene.

6. The aerosol cooling material for cigarettes according to claim 1, characterized in that The porosity of the aerosol cooling material for cigarettes is 60% to 90%.

7. The aerosol cooling material for cigarettes according to claim 1, characterized in that The basis weight of the aerosol cooling material for cigarettes is 40 g / cm 2 Up to 80g / cm 2 .

8. The aerosol cooling material for cigarettes according to claim 1, characterized in that The length of the aerosol cooling material for cigarettes is 3 mm to 10 mm.

9. A smoking article comprising a media portion and a filter portion, characterized in that The smoking article comprises an aerosol cooling material for a cigarette, The aerosol-cooling material for cigarettes includes a metal having a thermal conductivity of 10 W / m·K to 5000 W / m·K and is made of a porous foam or a porous sheet.

10. The smoking article according to claim 9, characterized in that The filter portion includes the cigarette aerosol-cooling material and is composed of a single or a plurality of filter segments.

11. The smoking article according to claim 9, characterized in that The smoking article further comprises a cooling portion located between the media portion and the filter portion, the cooling portion comprising the cigarette aerosol-cooling material.

12. The smoking article of claim 9, wherein The smoking article is a combustion type smoking article or a non-combustion type smoking article.

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