Filter for aerosol-generating article and aerosol-generating article comprising same

Abstract

The present invention relates to a filter for an aerosol-generating article and an aerosol-generating article comprising same, the filter being capable of effectively removing a specific substance contained in mainstream smoke while retaining excellent material properties for smoking.

Description

Filter for an aerosol generating article and an aerosol generating article including the same

[0001] The present invention relates to a filter for an aerosol generating article capable of effectively removing specific substances contained in mainstream smoke while achieving excellent smoking properties, and an aerosol generating article comprising the same.

[0002]

[0003] Generally, to manufacture tobacco, various types of leaf tobacco are blended and processed to produce the desired aroma and flavor. Next, the processed leaf tobacco is cut to produce cut tobacco leaves, and cigarettes can be manufactured by wrapping the cut tobacco leaves in cigarette paper. Depending on the need, such as to improve the taste of the smoke, a filter may be attached to the cigarette.

[0004] As a filter used in cigarettes, a filtration filter in which fibers are aggregated, or an adsorption filter to which an adsorbent material such as activated carbon or zeolite is added, can be used, and a cigarette filter can be manufactured by including a tow, which is a bundle of fiber strands.

[0005] Meanwhile, among the components contained in mainstream nitrate, substances with low molecular weight, ions, and high volatility are difficult to remove using conventional adsorbents. Therefore, there is a need to develop technology to effectively remove these specific substances.

[0006] [Prior Art Literature]

[0007] [Patent Literature]

[0008] (Patent Document 1) Korean Published Patent Application 10-2023-0056843 (Published April 28, 2023)

[0009]

[0010] The present invention provides a filter for an aerosol generating article and an aerosol generating article containing the same, which can effectively remove specific substances contained in mainstream smoke while achieving excellent smoking properties by including a basic calcium phosphate-based compound.

[0011] However, the problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below.

[0012]

[0013] One embodiment of the present invention provides a filter for an aerosol generating article comprising: a first filter including a first filter material; a third filter spaced apart from and opposite to the first filter; and a second filter including a second filter material filled in the spaced-apart space between the first filter and the third filter, wherein the second filter material comprises a basic calcium phosphate-based compound.

[0014] In addition, one embodiment of the present invention provides an aerosol generating article comprising a medium portion; and a filter portion; wherein the filter portion includes a filter for the aerosol generating article.

[0015]

[0016] A filter for an aerosol generating article according to one embodiment of the present invention can effectively remove specific substances contained in mainstream smoke while maintaining smoking properties.

[0017] In addition, an aerosol generating article according to one embodiment of the present invention can effectively remove specific substances contained in mainstream smoke while simultaneously providing excellent smoking properties to the smoker.

[0018] The effects of the present invention are not limited to those described above, and unmentioned effects will be clearly understood by those skilled in the art from the present specification and the accompanying drawings.

[0019]

[0020] FIG. 1 is a drawing exemplarily showing an aerosol generating article according to one embodiment of the present invention.

[0021] FIG. 2 is a diagram exemplarily showing a cross-section of an aerosol generating article according to one embodiment of the present invention.

[0022]

[0023] In this specification, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0024] In this specification, the terms “comprise” and / or “comprising” specify the presence of the mentioned features, steps, numbers, actions, parts, elements, and / or groups thereof, and do not exclude the presence or addition of one or more other features, steps, numbers, actions, parts, elements, and / or groups thereof.

[0025] In this specification, "at least one of a, b and c" may include a, b, or c alone, or two or more combinations selected from the group consisting of a, b, and c.

[0026] In this specification, the term "a and / or b" is used to mean "a or b" and "a and b".

[0027] In this specification, the term "connection" refers not only to the direct structural connection of certain members but also includes the concept of indirect connection through the interposition of other members. Furthermore, in this specification, "connection" may include not only structural matters but also cases where one member is electrically connected to another. For example, the statement that a first component and a second component are connected may mean that they are structurally connected directly or indirectly, or are electrically connected.

[0028] Where multiple embodiments are described in this specification, each embodiment may be combined unless specifically stated otherwise. In this case, the effects of the present invention may be defined as including effects derived from each embodiment and effects resulting from the organic combination of each embodiment. For example, even if embodiments 1 and 2 are described independently in this specification, unless the context clearly indicates otherwise, embodiments 1 and 2 may be organically combined with each other, and the effects of the present invention may include effects resulting from the combination of embodiments 1 and 2.

[0029] In this specification, a range of numerical values ​​indicated by the term "to" represents a range of numerical values ​​that includes the values ​​listed before and after the term as the lower and upper limits, respectively. If multiple numerical values ​​are disclosed for the upper and lower limits of an arbitrary numerical range, the range of numerical values ​​disclosed in this specification may be understood as a range of numerical values ​​in which any one of the multiple lower limits and any one of the multiple upper limits are respectively the lower limit and upper limit. For example, if the specification states a to b or c to d, it may be understood as stating a to b, a to d, c to d, or c to b.

[0030] In this specification, terms such as “about” or “substantially” refer to a reasonable amount of variation of a term modified so as not to significantly alter the final result. Such terms may be interpreted to include a variation of at least ±5% or at least ±10% to the extent that the variation does not alter or invalidate the meaning of the word.

[0031] In this specification, a “layer” or “film” may include cases where, when observing the region in which the layer or film exists, it is formed over the entire region, or cases where it is formed only in a part of the region. For example, the surface of the layer or film may be defined as having a flat shape, a non-flat shape, and combinations thereof; or a continuous shape, a discontinuous shape, and combinations thereof. For example, when another member is composed of a layer or film directly on a member, the coverage of the other member on the surface of the member may be defined as 1% or more, 5% or more, 10% or more, 20% or more, 30% or more, 40% or more, 50% or more, 60% or more, 70% or more, 80% or more, 85% or more, 90% or more, 95% or more, or 99% or more. For example, it may also be defined as a “layer” or “film” when a plurality of particles form a clustered structure.

[0032] In this specification, when another member is placed directly on top of one member, it may be defined that no member is interposed between the one member and the other member.

[0033] In this specification, "aerosol generating article" may mean any smokeable product or any product capable of providing a smoking experience, regardless of whether it is based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco, or tobacco substitutes. For example, an aerosol generating article may include smokeable products such as cigarettes, cigars, and cigarillos. As another example, the aerosol generating article may be a combustible smoking article or a heated smoking article, specifically a heated smoking article.

[0034] In this specification, "Upstream" or "upstream direction" may mean a direction away from the smoker's bulb, and "Downstream" or "downstream direction" may mean a direction toward the smoker's bulb. The terms upstream and downstream may be used to describe the relative positions of the elements constituting the aerosol generating article.

[0035] In this specification, "longitudinal direction" may mean a direction corresponding to the longitudinal axis of the aerosol generating article.

[0036]

[0037] Hereinafter, the configuration of the present invention will be described in more detail with reference to the drawings.

[0038] One embodiment of the present invention provides a filter for an aerosol generating article comprising: a first filter including a first filter material; a third filter spaced apart from and opposite to the first filter; and a second filter including a second filter material filled in the spaced-apart space between the first filter and the third filter, wherein the second filter material comprises a basic calcium phosphate-based compound.

[0039] A filter for an aerosol generating article according to one embodiment of the present invention can effectively remove specific substances contained in mainstream smoke while maintaining smoking properties. Specifically, the composition of the present invention will be described in more detail with reference to the drawings, wherein the specific substances have a low molecular weight, ions, and strong volatility.

[0040] One embodiment of the present invention provides a filter for an aerosol generating article comprising: a first filter including a first filter material; a third filter spaced apart from and opposite to the first filter; and a second filter including a second filter material filled in the spaced-apart space between the first filter and the third filter, wherein the second filter material comprises a basic calcium phosphate-based compound.

[0041] A filter for an aerosol generating article according to one embodiment of the present invention can effectively remove a specific substance contained in mainstream smoke while maintaining smoking properties. Specifically, the specific substance may be a component having a low molecular weight, ions, and strong volatility. For example, the specific substance may be HCHO (Formaldehyde).

[0042] According to one embodiment of the present invention, the first filter, the second filter, and the third filter may be sequentially provided along the longitudinal direction of the filter for an aerosol generating article. Specifically, along the longitudinal direction of the filter for an aerosol generating article, the first filter and the third filter may be provided spaced apart by a predetermined distance while facing each other. Accordingly, a cavity, which is an empty spaced-out space, may be provided between the first filter and the third filter. The second filter material may be filled into the spaced-out space to form a second filter placed between the first filter and the third filter. At this time, the longitudinal direction of the filter for an aerosol generating article may refer to a direction corresponding to the longitudinal axis of the aerosol generating article described later.

[0043] According to one embodiment of the present invention, the filter for the aerosol generating article comprises a second filter filled with the second filter material, thereby effectively removing a specific substance contained in mainstream smoke during smoking. Specifically, the second filter material may include a basic calcium phosphate-based compound. The basic calcium phosphate-based compound may include hydroxyl groups. By using the basic calcium phosphate-based compound, a specific substance contained in mainstream smoke can be effectively removed.

[0044] According to one embodiment of the present invention, the basic calcium phosphate compound is hydroxyapatite (Ca5(PO4)3(OH)), disodium calcium phosphate (CaHPO4), tricalcium phosphate (Ca3(PO4)2), A-type bicarbonate hydroxyapatite (Ca 10 (PO4)6(CO3) y (OH) 2-2y , where 0 ≤ y ≤ 1), B-type bicarbonate hydroxyapatite (Ca 10-x (PO4) 6-x (CO3) x (OH) 2-x , where 0 ≤ x ≤ 2), may include at least one of octacalcium phosphate (Ca8H2(PO4)6·5H2O) and tetracalcium phosphate (Ca4(PO4)2O). Specifically, the basic calcium phosphate compound may include at least hydroxyapatite. By using the aforementioned type of basic calcium phosphate compound, specific substances contained in mainstream lead can be effectively removed.

[0045] According to one embodiment of the present invention, the first filter material may comprise at least one of activated carbon, activated carbon fiber, zeolite, silica gel, alumina, ion exchange resin, activated clay, bentonite, diatomite, metakaolin, carbon adsorbent, and porous silicate. Specifically, the carbon adsorbent may comprise graphene, and the first filter material may comprise at least activated carbon. The first filter material itself may provide a filtering effect on the mainstream smoke. By using the first filter material of the aforementioned type, specific substances contained in the mainstream smoke can be effectively removed.

[0046] According to one embodiment of the present invention, the size (average diameter) of the first filter material may be 0.01 mm or more and 2 mm or less. Specifically, the size of the first filter material may be 0.02 mm or more and 1.8 mm or less, 0.03 mm or more and 1.6 mm or less, 0.04 mm or more and 1.5 mm or less, 0.01 mm or more and 1.8 mm or less, 0.02 mm or more and 1.6 mm or less, 0.03 mm or more and 1.5 mm or less, 0.04 mm or more and 2 mm or less, 0.02 mm or more and 1.9 mm or less, 0.03 mm or more and 1.8 mm or less, or 0.04 mm or more and 1.7 mm or less. At this time, the size (average diameter) of the activated carbon, which is the first filter material, may be 0.01 mm or more and 2 mm or less. If the size of the first filter material is within the aforementioned range, a filtering effect can be achieved through the physical properties of the first filter material itself.

[0047] According to one embodiment of the present invention, the size of the second filter material may be 0.01 mm or more and 2 mm or less. Specifically, the size of the second filter material may be 0.02 mm or more and 1.8 mm or less, 0.03 mm or more and 1.6 mm or less, 0.04 mm or more and 1.5 mm or less, 0.01 mm or more and 1.8 mm or less, 0.02 mm or more and 1.6 mm or less, 0.03 mm or more and 1.5 mm or less, 0.04 mm or more and 2 mm or less, 0.02 mm or more and 1.9 mm or less, 0.03 mm or more and 1.8 mm or less, or 0.04 mm or more and 1.7 mm or less. At this time, the size (average diameter) of the hydroxyapatite, which is the second filter material, may be 0.01 mm or more and 2 mm or less. If the size of the second filter material is within the aforementioned range, the second filter material can be easily filled into the spaced-apart space (cavity), thereby improving the oxidation removal efficiency of a specific substance contained in the main body of smoke.

[0048] According to one embodiment of the present invention, the size ratio of the first filter material and the second filter material may be 1:0.01 to 1:10. Specifically, the size ratio of the first filter material and the second filter material may be 1:0.02 to 1:9, 1:0.05 to 1:8, 1:0.08 to 1:7, 1:0.1 to 1:6, 1:0.01 to 1:9, 1:0.02 to 1:8, 1:0.05 to 1:7, 1:0.08 to 1:6, 1:0.1 to 1:10, 1:0.01 to 1:6, 1:0.02 to 1:10, 1:0.05 to 1:9, 1:0.08 to 1:8, or 1:0.1 to 1:7. When the size ratio of the first filter material and the second filter material is within the aforementioned range, specific substances contained in the main flue can be effectively removed while preventing a decrease in the flowability of the main flue.

[0049] According to one embodiment of the present invention, the content of the first filter material per unit length of the first filter may be 0.5 mg / mm or more and 5 mg / mm or less. Specifically, the content of the first filter material per unit length of the first filter may be 1 mg / mm or more and 4.5 mg / mm or less, 1.5 mg / mm or more and 4 mg / mm or less, 2 mg / mm or more and 3.5 mg / mm or less, 0.5 mg / mm or more and 4.5 mg / mm or less, 1 mg / mm or more and 4 mg / mm or less, 1.5 mg / mm or more and 3.5 mg / mm or less, 2 mg / mm or more and 5 mg / mm or less, 0.5 mg / mm or more and 3.5 mg / mm or less, 1 mg / mm or more and 5 mg / mm or less, 1.5 mg / mm or more and 4.5 mg / mm or less, or 2 mg / mm or more and 4 mg / mm or less. When the content of the first filter material per unit length of the first filter is within the aforementioned range, a filter capable of effectively removing specific substances contained in mainstream smoke while achieving excellent smoking properties can be easily implemented.

[0050] According to one embodiment of the present invention, the content of the first filter material included in the first filter may be 4.5 mg or more and 75 mg or less. Specifically, the content of the first filter material included in the first filter may be 5 mg or more and 70 mg or less, 10 mg or more and 65 mg or less, 20 mg or more and 60 mg or less, 30 mg or more and 50 mg or less, 4.5 mg or more and 70 mg or less, 5 mg or more and 60 mg or less, 10 mg or more and 50 mg or less, 20 mg or more and 55 mg or less, 30 mg or more and 70 mg or less, 4.5 mg or more and 50 mg or less, 5 mg or more and 75 mg or less, 10 mg or more and 55 mg or less, 20 mg or more and 65 mg or less, or 30 mg or more and 60 mg or less. When the content of the first filter material included in the first filter is within the aforementioned range, a filter capable of effectively removing specific substances contained in mainstream smoke while achieving excellent smoking properties can be easily implemented. At this time, the content of the first filter material included in the first filter may be the same as the content of the first filter material included in the filter for the aerosol generating article.

[0051] According to one embodiment of the present invention, the content of the second filter material per unit length of the second filter may be 20 mg / mm or more and 100 mg / mm or less. Specifically, the content of the second filter material per unit length of the second filter may be 25 mg / mm or more and 90 mg / mm or less, 30 mg / mm or more and 80 mg / mm or less, 40 mg / mm or more and 60 mg / mm or less, 20 mg / mm or more and 90 mg / mm or less, 25 mg / mm or more and 80 mg / mm or less, 30 mg / mm or more and 70 mg / mm or less, 35 mg / mm or more and 60 mg / mm or less, 40 mg / mm or more and 100 mg / mm or less, 20 mg / mm or more and 60 mg / mm or less, 30 mg / mm or more and 100 mg / mm or less, or 40 mg / mm or more and 80 mg / mm or less. When the content of the second filter material per unit length of the second filter is within the aforementioned range, the external surface area of ​​the second filter material capable of oxidation reaction with a specific substance contained in mainstream smoke can be effectively secured. Through this, a filter capable of effectively removing a specific substance contained in mainstream smoke while achieving excellent smoking properties can be easily implemented.

[0052] According to one embodiment of the present invention, the content of the second filter material included in the second filter may be 100 mg or more and 500 mg or less. Specifically, the content of the second filter material included in the second filter may be 120 mg or more and 450 mg or less, 150 mg or more and 400 mg or less, 170 mg or more and 370 mg or less, 200 mg or more and 350 mg or less, 100 mg or more and 450 mg or less, 120 mg or more and 400 mg or less, 150 mg or more and 370 mg or less, 170 mg or more and 350 mg or less, 200 mg or more and 500 mg or less, 100 mg or more and 350 mg or less, 150 mg or more and 420 mg or less, 200 mg or more and 400 mg or less, 170 mg or more and 450 mg or less, or 120 mg or more and 350 mg or less. When the content of the second filter material included in the second filter is within the aforementioned range, a filter capable of effectively removing specific substances contained in mainstream smoke while achieving excellent smoking properties can be easily implemented. In this case, the content of the second filter material included in the second filter may be the same as the content of the second filter material included in the filter for the aerosol generating article.

[0053] According to one embodiment of the present invention, the weight ratio of the first filter material to the second filter material may be 1:2 to 1:20. Specifically, the weight ratio of the first filter material to the second filter material may be 1:3 to 1:18, 1:4 to 1:15, 1:5 to 1:12, 1:2 to 1:18, 1:3 to 1:15, 1:4 to 1:12, 1:5 to 1:20, 1:2 to 1:12, 1:3 to 1:20, 1:4 to 1:18, or 1:5 to 1:15. When the weight ratio of the first filter material to the second filter material is within the aforementioned range, excellent smoking properties can be achieved while effectively removing specific substances contained in mainstream smoke.

[0054] According to one embodiment of the present invention, the volume ratio of the first filter and the second filter may be 1:0.1 to 1:10. Specifically, the volume ratio of the first filter and the second filter may be 1:0.1 to 1:8, 1:0.1 to 1:6, 1:0.2 to 1:10, 1:0.2 to 1:8, or 1:0.2 to 1:6. When the volume ratio of the first filter and the second filter is within the aforementioned range, excellent smoking properties can be achieved while effectively removing specific substances contained in mainstream smoke. In this case, when the diameters of the first filter and the second filter are the same, the length ratio of the first filter and the second filter may be 1:0.1 to 1:10.

[0055] According to one embodiment of the present invention, the filling rate of the second filter material may be 55% or more. Specifically, the density at which the second filter material is filled into the second filter may be 55% or more and 100% or less, 60% or more and 99% or less, 55% or more and 99% or less, or 60% or more and 100% or less. When the filling rate of the second filter material is within the aforementioned range, an external surface area of ​​the second filter material capable of oxidizing with a specific substance contained in mainstream smoke can be effectively secured. In addition, the room-temperature oxidizing power of the specific substance contained in mainstream smoke is enhanced, allowing for effective removal while achieving excellent smoking properties.

[0056] According to one embodiment of the present invention, the filling rate of the second filter material can be calculated using the internal volume of the second filter and the volume of the second filter material filled in the second filter.

[0057] At this time, the internal volume of the separation space (cavity) of the second filter can be calculated by the following Equation 1.

[0058] [Equation 1]

[0059] Internal volume of the separation space of the second filter = Pi (ð) × (Diameter of the second filter / 2) 2 Х Second filter length

[0060] The apparent density of the second filter material and the weight of the second filter material filled in the space (cavity) of the second filter are measured. The volume of the filled second filter material can be calculated by the following Equation 2.

[0061] [Equation 2]

[0062] Volume of filled second filter material = (Actual weight of second filter material) / (Apparent density of second filter material)

[0063] The filling rate of the second filter material can be calculated using the internal volume of the second filter calculated in Equation 1 above and the volume of the filled second filter material calculated in Equation 2 above through Equation 3 below.

[0064] [Equation 3]

[0065] Filling rate of the second filter material = (Volume of the filled second filter material) / (Internal volume of the second filter cavity) × 100

[0066] According to one embodiment of the present invention, the diameter of the first filter may be 5 mm or more and 10 mm or less, 5 mm or more and 9 mm or less, or 5 mm or more and 8 mm or less. When the diameter of the first filter is within the aforementioned range, specific substances contained in mainstream smoke during smoking can be effectively filtered. Additionally, the length of the first filter may be 10 mm or more and 20 mm or less, 12.5 mm or more and 17.5 mm or less, 10 mm or more and 15 mm or less, or 15 mm or more and 20 mm or less. When the length of the first filter is within the aforementioned range, specific substances contained in mainstream smoke during smoking can be effectively removed.

[0067] According to one embodiment of the present invention, the diameter of the second filter may be 5 mm or more and 10 mm or less, 5 mm or more and 9 mm or less, or 5 mm or more and 8 mm or less. When the diameter of the second filter is within the aforementioned range, specific substances contained in the mainstream smoke during smoking can be effectively filtered. Additionally, the length of the second filter may be 2 mm or more and 10 mm or less, 3 mm or more and 8 mm or less, 4 mm or more and 5 mm or less, or 5 mm or more and 9 mm or less. When the length of the second filter is within the aforementioned range, specific substances contained in the mainstream smoke during smoking can be effectively removed.

[0068] According to one embodiment of the present invention, the third filter may not include a filter material. Specifically, the third filter may not include at least one of the first filter material and the second filter material. That is, the third filter may be a filter that does not include a filter material.

[0069] According to one embodiment of the present invention, the diameter of the third filter may be 5 mm or more and 10 mm or less, 5 mm or more and 9 mm or less, or 5 mm or more and 8 mm or less. When the diameter of the third filter is within the aforementioned range, specific substances contained in mainstream smoke can be effectively removed during smoking. Additionally, the length of the third filter may be 2 mm or more and 20 mm or less, 5 mm or more and 15 mm or less, 7 mm or more and 9 mm or less, or 7 mm or more and 12 mm or less. When the length of the third filter is within the aforementioned range, specific substances contained in mainstream smoke can be effectively removed during smoking.

[0070] According to one embodiment of the present invention, the filter for the aerosol generating article comprises the first filter, the second filter, and the third filter and may be formed from various materials. In this case, the material used in the industry for manufacturing the filter for the aerosol generating article may be used without limitation. For example, the filter for the aerosol generating article may be a cellulose acetate filter, a cellulose tow filter, a paper filter, or a polypropylene (PP) tow filter.

[0071]

[0072] FIG. 1 is a drawing exemplarily showing an aerosol generating article according to one embodiment of the present invention.

[0073] One embodiment of the present invention provides an aerosol generating article comprising: a medium portion; and a filter portion; wherein the filter portion includes a filter for the aerosol generating article.

[0074] An aerosol generating article according to one embodiment of the present invention can effectively remove specific substances contained in mainstream smoke while simultaneously providing excellent smoking properties to smokers.

[0075] Referring to FIG. 1, the aerosol generating article (100) may include a filter portion (110) wrapped with a filter roll (110a), a medium portion (120) wrapped with a medium portion wrapper (120a), and a tip paper (130).

[0076] According to one embodiment of the present invention, the medium may include a smoking material. For example, the smoking material may include a tobacco material. The tobacco material may include tobacco leaf fragments, tobacco stems, or materials processed from these. As a more specific example, the tobacco material may include crushed tobacco leaves, crushed reconstituted tobacco, puffed tobacco leaves, puffed main veins, and plate-shaped leaves. However, it is not limited thereto. Additionally, the tobacco material may have the form of tobacco leaves, tobacco particles, tobacco sheets, tobacco beads, tobacco granules, or tobacco extracts, but is not limited thereto.

[0077] According to one embodiment of the present invention, the medium may contain other additive substances such as flavoring agents, humectants, and / or acetate compounds. For example, the flavoring agent 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, or coffee. Additionally, the humectant may include glycerin or propylene glycol. Furthermore, the medium may further include a vitamin component. For example, the vitamin component may include at least one of vitamin A, vitamin B, vitamin C, and vitamin E, but is not limited thereto.

[0078] According to one embodiment of the present invention, in addition to including a filter for the aerosol generating article, the filter portion may utilize any configuration of filter portion used in the art without limitation. The filter portion may be positioned downstream of the medium portion and may be an area through which the aerosol material generated in the medium portion passes immediately before being inhaled by the user. The filter portion may be formed of various materials; for example, the filter portion may be a cellulose acetate filter.

[0079] According to one embodiment of the present invention, the filter portion may be a cellulose acetate filter that has not been flavored with a fragrance material, but is not limited thereto, and the filter portion may be a TJNS (transfer jet nozzle system) filter that has been flavored with a fragrance material. The filter portion may also be a tube-shaped structure containing a hollow interior. Additionally, the filter portion may be manufactured by inserting a structure such as a film or tube of the same or different material into the interior (e.g., the hollow interior).

[0080] According to one embodiment of the present invention, the hardness of the filter portion can be adjusted by controlling the content of the plasticizer during the manufacture of the filter portion. Triacetin may be used as the plasticizer, but the type and content of the plasticizer are not limited thereto and can be appropriately adjusted as needed.

[0081] According to one embodiment of the present invention, the filter unit (110) may include a first filter (111), a second filter (112), and a third filter (113).

[0082] FIG. 2 is a diagram exemplarily showing a cross-section of an aerosol generating article according to one embodiment of the present invention.

[0083] According to one embodiment of the present invention, the first filter, the second filter, and the third filter may be sequentially provided based on the direction from the medium portion toward the filter portion. For example, the first filter and the third filter may be positioned spaced apart at a predetermined interval, and a second filter material may be positioned in the space between the first filter and the third filter, and then wrapped with a filter winding to manufacture a filter portion having the first filter, the second filter, and the third filter sequentially provided.

[0084] Referring to FIG. 2, the filter unit (110) may include a first filter (111), a second filter (112), and a third filter (113). At this time, the order of the filters provided from the upstream direction to the downstream direction may be the first filter (111), the second filter (112), and the third filter (113). By positioning the first filter (111) and the second filter (112) of the filter for the aerosol generating item upstream relative to the third filter (113), the aerosol generating item (100) can provide excellent smoking properties to the smoker, and specific substances contained in the mainstream smoke can be effectively removed.

[0085] According to one embodiment of the present invention, a capsule (not shown) may be included inside the filter portion. The capsule may have a structure in which a liquid containing a fragrance is wrapped in a film, and for example, the capsule may have a spherical or cylindrical shape. The material forming the film of the capsule may be a natural material, starch, and / or a gelling agent. For example, in the case of a film made of a natural material, it may be composed of agar, pectin, sodium alginate, and glycerin, etc. Gellan gum or gelatin may be used as a gelling agent. In addition, a gelling aid may be further used as a material forming the film of the capsule. For example, calcium chloride may be used as a gelling aid. In addition, a plasticizer may be further used as a material forming the film of the capsule. Here, glycerin and / or sorbitol may be used as a plasticizer. In addition, a coloring agent may be further used as a material forming the film of the capsule.

[0086] For example, medium chain fatty acid triglyceride (MCTG) may be used as a solvent for the flavoring included in the liquid contents of the capsule. In addition, the liquid contents may contain other additives such as colorants, emulsifiers, and thickeners. The liquid contents of the capsule may contain flavorings such as menthol and plant essential oils, but are not limited thereto.

[0087] According to one embodiment of the present invention, the filter portion is positioned downstream of the medium portion and serves as a filter through which an aerosol substance generated in the medium portion passes immediately before being inhaled by a user. The filter portion may be packaged by a filter roll.

[0088] Meanwhile, the medium may be wrapped by a medium wrapper. The medium wrapper may contain glycerin and a combustion promoter such as K-citrate and / or NA-citrate to promote the complete combustion of the smoking substance through catalytic action, and furthermore, may contain a filler such as calcium carbonate, titanium dioxide, or magnesium oxide.

[0089] According to one embodiment of the present invention, the medium wrapper may have a double wrapping structure. Specifically, the medium wrapper may include an inner wrapper that contacts the medium and wraps the medium, and an outer wrapper that contacts the inner wrapper and wraps the outside of the inner wrapper.

[0090] Furthermore, the medium wrapper may be a low ignition propensity (LIP) cigarette paper having one or more LIP bands (not shown) formed thereon. The LIP bands can reduce the porosity of the medium wrapper, and accordingly, when the combustion of the tobacco reaches the LIP bands, the amount of oxygen flowing into the medium is reduced, so that the aerosol-generating material being burned can be extinguished. Here, the LIP bands may be a coating layer formed on the inner surface of the medium wrapper. The filter portion packaged by the filter roll and the medium portion packaged by the medium wrapper may be combined and packaged by tip paper. That is, the tip paper may be wrapped around at least a portion of the medium wrapper (e.g., a downstream portion) and the outer edge of the filter roll. Meanwhile, the tip paper may contain a non-combustible material to prevent the filter portion from burning along with the combustion of the medium portion.

[0091] According to one embodiment of the present invention, the aerosol generating article may have a tar transfer amount of 7 mg / cig. or less. Specifically, the aerosol generating article may have a tar transfer amount of 5 mg / cig. or more and 7 mg / cig. or less, 5.5 mg / cig. or more and 6.5 mg / cig. or 5 mg / cig. or more and 6 mg / cig. or less.

[0092] According to one embodiment of the present invention, the aerosol generating article may have a nicotine transfer amount of 0.1 mg / cig. or more. Specifically, the aerosol generating article may have a nicotine transfer amount of 0.1 mg / cig. or more and 1 mg / cig. or less, 0.1 mg / cig. or more and 0.5 mg / cig. or 0.5 mg / cig. or more and 1 mg / cig. or less.

[0093] According to one embodiment of the present invention, the aerosol generating article may have a nicotine transfer amount relative to the tar transfer amount of 5% or more and 20% or less. Specifically, the nicotine transfer amount relative to the tar transfer amount of the aerosol generating article may be 7% or more and 15% or less, 9% or more and 12% or less, 5% or more and 10% or less, or 9% or more and 20% or less. By controlling the nicotine transfer amount relative to the tar transfer amount of the aerosol generating article to be within the above numerical range, the removal rate of specific substances can be improved while simultaneously realizing excellent smoking properties.

[0094] According to one embodiment of the present invention, the removal rate of a specific substance of the aerosol generating article may be 5% or more and 100% or less. Specifically, the removal rate of a specific substance of the aerosol generating article may be 7% or more and 90% or less, 10% or more and 80% or less, 20% or more and 70% or less, 30% or more and 65% or less, 10% or more and 65% or less, or 5% or more and 70% or less. By controlling the removal rate of a specific substance of the aerosol generating article to be within the above numerical range, the specific substance can be effectively removed.

[0095]

[0096] Hereinafter, the present invention will be described in detail with reference to examples to specifically explain the invention. However, the embodiments according to the present invention may be modified in various different forms, and the scope of the present invention is not to be interpreted as being limited to the embodiments described below. The embodiments of this specification are provided to more completely explain the present invention to those with average knowledge in the art.

[0097]

[0098] Examples

[0099] ingredient

[0100] Activated carbon was prepared as the first filter material, and hydroxyapatite, a basic calcium phosphate-based compound, was prepared as the second filter material.

[0101]

[0102] Example 1

[0103] manufacturing of filters

[0104] A filter was manufactured comprising: a first cellulose acetate filter with activated carbon having an average diameter of 0.266 mm; a third cellulose acetate filter; and a second filter in which 85% of hydroxyapatite having an average diameter of 0.266 mm was filled in a cavity that is a space between the first filter and the third filter. At this time, the diameters of the first filter, the second filter, and the third filter were each 7.8 mm, and the lengths of the first filter, the second filter, and the third filter were 15 mm, 5 mm, and 7 mm, respectively. At this time, the content of activated carbon included in the first filter was 30 mg, and the content of activated carbon per unit length of the first filter was 2 mg / mm. The content of hydroxyapatite included in the second filter was 293 mg, and the content of hydroxyapatite per unit length of the second filter was 58.60 mg / mm.

[0105]

[0106] Aerosol generating products

[0107] An aerosol generating article was manufactured comprising a medium portion; and a filter portion including the filter, as shown in FIG. 1. At this time, the filter was provided sequentially with respect to the direction from the medium portion toward the filter portion, wherein the first filter, the second filter, and the third filter were provided. In addition, at this time, the diameter of the smoking article was 7.8 mm, the length of the medium portion was 57 mm, and the total length of the filter portion was 27 mm.

[0108]

[0109] Examples 2 to 15

[0110] A filter and an aerosol generating article were manufactured in the same manner as in Example 1, except that the diameter of the first filter material and the second filter material, the content of the first filter material and the second filter material, and the filling rate of the second filter material were adjusted as shown in Table 1 below.

[0111]

[0112] Average diameter of first filter material (mm) Average diameter of second filter material (mm) Content per unit length of first filter material (mg / mm) Content per unit length of second filter material (mg / mm) Content of first filter material contained in first filter (mg / 15mm) Content of second filter material contained in second filter (mg / 5mm) Second filter material filling rate (%) Example 1 0.266 0.266 2.005 8.603029385 Example 2 0.045 0.266 3.335 8.605029385 Example 3 0.115 0.266 3.335 8.605029385 Example 4 0.677 0.266 3.335 8.605029385 Example 51.5000.2663.3358.605029385 Example 60.2660.0453.3358.605029385 Example 70.2660.1153.3358.605029385 Example 80.2660.6773.3358.605029385 Example 90.2661.5003.3358.605029385 Example 100.2660.2662.0041.403020760 Example 110.2660.2662.0048.203024170 Example 120.2660.2662.0055.203027680 Example 130.2660.2662.0062.003031090 Example 140.2660.2662.0065.403032795 Example 150.2660.2662.0068.203034199

[0113]

[0114] Comparative Example 1

[0115] As shown in Table 2 below, a filter and an aerosol generating article were manufactured in the same manner as in Example 1, except that the second filter material was not added to the second filter.

[0116]

[0117] Comparative Example 2

[0118] As shown in Table 2 below, in Example 1 above, a filter and an aerosol generating article were manufactured in the same manner as in Example 1, except that 40 mg of the first filter material was added to the first filter and 172 mg of the second filter material was added to the second filter to fill it to 50%.

[0119]

[0120] Average diameter of first filter material (mm) Average diameter of second filter material (mm) Content per unit length of first filter material (mg / mm) Content per unit length of second filter material (mg / mm) Content of first filter material contained in first filter (mg / 15mm) Content of second filter material contained in second filter (mg / 5mm) Second filter material filling rate (%) Comparative Example 1 0.22 60.00 03.33 0.00 50 00 Comparative Example 20.26 60.26 62.67 34.40 40 172 50

[0121]

[0122] Smoke transfer analysis based on the size of the first and second filter materials

[0123] The results of analyzing the aerosol components of the aerosol generating products prepared in Examples 1 to 9 and Comparative Example 1 using gas chromatography (GC) are shown in Table 3 below.

[0124]

[0125] Size ratio of first filter material and second filter material Tar (mg / cig.) Nic. (mg / cig.) N / T * 100 (%) HCHO (ug / cig.) HCHO removal rate (%) Comparative Example 11: 0.5 30.5 59.2 727 40.0 Example 11: 1.0 0.6 20.5 69.3 01 105 9.9 Example 21: 5.9 16.3 90.5 99.2 31 524 4.5 Example 31: 2.3 16.0 60.5 69.2 41 125 9.1 Example 41: 0.3 96.0 80.5 79.3 81 225 5.5 Example 51: 0.1 85.7 60.5 49.3 81 155 8.0 Example 61:0.176.030.569.2916440.1 Example 71:0.435.870.559.3712853.3 Example 81:2.556.200.589.3511757.3 Example 91:5.646.130.579.3017536.1

[0126]

[0127] In Table 3 above, the removal rate of HCHO is calculated by comparing the HCHO content measured in Examples 1 to 9 with the HCHO content measured in Comparative Example 1.

[0128] Referring to Table 3 above, it was confirmed that in the case of an aerosol generating product using the filters of Examples 1 to 9 of the present invention, HCHO contained in mainstream smoke is effectively removed while excellent smoking properties are maintained.

[0129] On the other hand, in the case of the filter of Comparative Example 1, it was confirmed that the ability to remove HCHO contained in mainstream smoke was very inferior.

[0130]

[0131] Smoke transfer analysis based on the content ratio and filling rate of the first filter material and the second filter material

[0132] Using gas chromatography (GC), the smoke components of the aerosol generating products prepared in Examples 1, 10 to 15, Comparative Example 1, and Comparative Example 2 were measured, and the results are shown in Table 4 below.

[0133]

[0134] Weight ratio of first filter material and second filter material Tar (mg / cig.) Nic. (mg / cig.) N / T * 100 (%) HCHO (ug / cig.) HCHO removal rate (%) Comparative Example 11: 0 5.9 30.5 5 9.2 7 27 40.0 Comparative Example 21: 4.30 6.16 0.5 7 9.25 26 7 2.6 Example 11: 9.7 7 6.0 20.5 6 9.30 110 5 9.9 Example 101: 6.9 0 5.9 9 0.5 6 9.35 24 6 10.2 Example 111: 8.0 35.8 7 0.5 5 9.37 18 43 2.8 Example 121: 9.20 6.27 0.5 8 9.25 135 5 0.7 Example 131:10.335.760.549.3811259.1 Example 141:10.905.970.569.3810462.0 Example 151:11.376.080.579.3810362.4

[0135]

[0136] In Table 4 above, the removal rate of HCHO is calculated by comparing the HCHO content measured in Comparative Example 2, Example 1, and Examples 10 to 15 with the HCHO content measured in Comparative Example 1.

[0137] Referring to Table 4 above, it was confirmed that in the case of an aerosol generating article using the filters of Example 1 and Examples 10 to 15 of the present invention, HCHO contained in mainstream smoke is effectively removed while excellent smoking properties are maintained.

[0138] On the other hand, in the case of the filters of Comparative Example 1 and Comparative Example 2, it was confirmed that the ability to remove HCHO contained in mainstream smoke was very inferior.

[0139]

[0140] [Explanation of the symbol]

[0141] 100: Aerosol generating item 110: Filter part

[0142] 110a: Filter winding

[0143] 111: 1st filter 112: 2nd filter

[0144] 113: Third filter

[0145] 120: Medium part

[0146] 120a: Beating Department Rapper 130: Tip Paper

Claims

1. A first filter comprising a first filter material; A third filter spaced apart from and opposite the first filter; and A second filter comprising a second filter material filled in the space between the first filter and the third filter; and The above second filter material is a filter for aerosol generating articles comprising a basic calcium phosphate-based compound.

2. In Paragraph 1, A filter for an aerosol generating article, wherein the above basic calcium phosphate-based compound comprises at least one of hydroxyapatite, disaccharide, tricalcium phosphate, bicarbonate hydroxyapatite, octaccharide phosphate, and tetracalcium phosphate.

3. In Paragraph 1, A filter for an aerosol generating article, wherein the first filter material comprises at least one of activated carbon, activated carbon fiber, zeolite, silica gel, alumina, ion exchange resin, activated clay, bentonite, diatomite, metakaolin, carbon adsorbent, and porous silicate.

4. In Paragraph 1, A filter for an aerosol generating article, wherein the size of the first filter material is 0.01 mm or more and 2 mm or less.

5. In Paragraph 1, A filter for an aerosol generating article, wherein the size of the second filter material is 0.01 mm or more and 2 mm or less.

6. In Paragraph 1, A filter for an aerosol generating article, wherein the size ratio of the first filter material and the second filter material is 1:0.01 to 1:

10.

7. In Paragraph 1, A filter for an aerosol generating article, wherein the weight ratio of the first filter material and the second filter material is 1:2 to 1:

20.

8. In Paragraph 1, A filter for an aerosol generating article in which the filling rate of the second filter material is 55% or more.

9. In Paragraph 1, A filter for an aerosol generating article, wherein the content of the first filter material per unit length of the first filter is 0.5 mg / mm or more and 5 mg / mm or less.

10. In Paragraph 1, A filter for an aerosol generating article, wherein the content of the second filter material per unit length of the second filter is 20 mg / mm or more and 100 mg / mm or less.

11. Medium part; and Includes a filter section; and The above filter part An aerosol generating article comprising a filter for an aerosol generating article according to paragraph 1.

12. In Paragraph 11, An aerosol generating article having the first filter, the second filter, and the third filter sequentially provided based on the direction from the medium portion toward the filter portion.

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