KR20240079676A - Filter for smoking articles, and smoking articles including the same - Google Patents

Abstract

The present invention relates to a filter for a smoking article, comprising a plurality of filter parts and an adsorbent, wherein the adsorbent includes gC ₃ N ₄ .

Description

Filter for smoking articles, and smoking articles including the same}

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

Generally, a filter is located at the proximal end (ME) of a smoking article, and the filter serves to filter smoke components by removing particles and vapor phase of cigarette smoke.

To filter smoke components, various materials such as cellulose acetate and paper have been commonly used as filter materials for smoking articles. However, because the efficiency of removing cigarette smoke components with a single filter is low, multiple filters with the addition of adsorbents such as activated carbon have been mainly used.

However, existing cigarette filters control the smoke components of mainstream smoke by forming additional perforations on the outside of the filter and diluting them with air, so there is a problem in that the amount of smoke components inhaled relatively changes depending on the smoker's smoking method.

In order to solve the above problems, the purpose of the present invention is to provide a filter for smoking articles containing an adsorbent that can filter smoke components without being affected by the smoker's smoking method.

However, the problems to be solved by the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

According to one embodiment of the present invention, a filter for smoking articles is provided, comprising a plurality of filter parts and an adsorbent, wherein the adsorbent includes gC ₃ N ₄ .

According to one side, a smoking substances section containing tobacco substances; and

A smoking article including a filter unit according to an embodiment of the present invention is provided.

According to another aspect, a method of manufacturing a filter for a smoking article comprising a plurality of filter parts and an adsorbent, wherein the adsorbent includes gC ₃ N ₄ ,

Preparing an adsorbent made of gC ₃ N ₄ (S1);

Step (S2) of manufacturing a filter unit by filling the adsorbent; and

It provides a method of manufacturing a filter for smoking articles, including a step (S3) of wrapping the filter unit with a filter wrapper and tip paper.

Using the filter for smoking articles of the present invention, the content of specific smoke components in mainstream smoke can be absolutely reduced regardless of the smoker's smoking habits, so there is an advantage in that the content of smoke components in mainstream smoke can be adjusted independently of existing materials. .

Additionally, it can solve the chronic problem of sucking in products with an air dilution rate.

The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a schematic diagram of a dual filter according to an embodiment of the present invention.
Figure 2 is a schematic diagram of a triple filter according to an embodiment of the present invention.
Figure 3 is a schematic diagram of a filter further including a filter wrapper and tip paper in a double filter (a) or triple filter (b) according to an embodiment of the present invention.
Figure 4 is a schematic diagram of a triple filter including gC ₃ N ₄ according to an embodiment of the present invention.
Figure 5 is a schematic diagram of a dual filter including gC ₃ N ₄ according to an embodiment of the present invention.

Hereinafter, embodiments will be described in detail with reference to the attached drawings. However, since various changes can be made to the embodiments, the scope of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents, or substitutes for the embodiments are included in the scope of rights.

The terms used in the examples are for descriptive purposes only and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the embodiments belong. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless clearly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

In addition, when describing with reference to the accompanying drawings, identical components will be assigned the same reference numerals regardless of the reference numerals, and overlapping descriptions thereof will be omitted. In describing the embodiments, if it is determined that detailed descriptions of related known technologies may unnecessarily obscure the gist of the embodiments, the detailed descriptions are omitted.

Additionally, in describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term.

Components included in one embodiment and components including common functions will be described using the same names in other embodiments. Unless stated to the contrary, the description given in one embodiment may be applied to other embodiments, and detailed description will be omitted to the extent of overlap.

Throughout the specification, when a part “includes” a certain component, this does not mean excluding other components, but rather means that it can further include other components.

Throughout the specification, 'smoking articles' may refer to articles that can generate aerosols, such as cigarettes (cigarettes), cigars, etc. Smoking articles may contain aerosol-generating substances or aerosol-forming substrates. Additionally, smoking articles may include solid substances based on tobacco raw materials, such as leaf tobacco, cut tobacco, and reconstituted tobacco. Smoking materials may contain volatile compounds.

Throughout the specification, 'gC ₃ N ₄ ' may refer to graphitic carbon nitrides. gC ₃ N ₄ may contain two substructures based on poly(triazine imide) units and heptazine, with various condensation, properties and reactivity depending on reaction conditions. there is.

According to one embodiment of the present invention, a filter for smoking articles can be provided, comprising a plurality of filter parts and an adsorbent, wherein the adsorbent includes gC ₃ N ₄ .

A filter for smoking articles may include a plurality of filter units, and may preferably be a double or triple filter. According to Figure 1, the double filter 10 may be composed of a first filter part 12 located at the proximal end and a second filter part 14 in contact with the tobacco cut filler. Meanwhile, according to Figure 2, the triple filter 20 includes a first filter part 22 located at the proximal end, a third filter part 26 in contact with the cigarette cut filler, and a second filter located between the first and third filter parts. It may be composed of parts 24. However, it is not limited to this.

gC ₃ N ₄ may be included in one or more filter units. Preferably, it can be located in the filter section away from the proximal end. For example, in the case of a double filter 10, it may be located in the second filter unit 14 (Figure 1), and in the case of a triple filter 20, it may be located in the second filter unit 24 or the third filter unit 26. ) may be included (Figure 2).

In the filter for smoking articles according to an embodiment of the present invention, smoke components may be adsorbed on the surface of the gC ₃ N ₄ . At this time, the smoke component may be TPM, tar, or nicotine, for example, and the smoke component may be physically adsorbed on the surface of gC ₃ N ₄ or may be adsorbed due to a high specific surface area and high surface energy. Due to these characteristics, using an adsorbent containing gC ₃ N ₄ can reduce the absolute level of mainstream smoke components, unlike activated carbon.

In the filter for smoking articles according to an embodiment of the present invention, the structure of gC ₃ N ₄ may be any one of a sheet, particle, wire, rod, or three-dimensional network, but is not limited thereto.

In the filter for smoking articles according to an embodiment of the present invention, the average particle diameter of gC ₃ N ₄ may be 0.1 mm to 5 mm. If the particle diameter is within the above range, it can have an appropriate weight to fall on the process load when actually introduced into the process.

In the filter for smoking articles according to an embodiment of the present invention, the adsorbent may be porous. Tobacco smoke components may be adsorbed through micropores formed inside the adsorbent.

The specific surface area of the adsorbent may be 500 m ² /g to 1000 m ² /g. If the specific surface area of the adsorbent is less than 500 m ² /g, adsorption may not occur. On the other hand, if the specific surface area of the adsorbent is greater than 1000 m ² /g, the adsorption efficiency may be lowered. However, it is not limited to the described range.

In the filter for smoking articles according to an embodiment of the present invention, the TPM removal rate of the adsorbent may be 75% or more. For example, the TPM removal rate of the adsorbent may be 75% or more and less than 100%, 76% or more and less than 90%, 77% or more and less than 85%, and 78% or more and less than 80%. However, the scope of description is not limited.

In the filter for smoking articles according to an embodiment of the present invention, the filter unit may further include at least one fiber selected from the group consisting of cellulose acetate, lyocell, polypropylene, polyester, and polylactic acid.

The fibers may be included in a plurality of filter units. For example, in the case of the double filter 10, it may be included in the first filter unit 12 (Figure 1), and in the case of the triple filter 20, it may be included in the first filter unit 22 and/or the third filter unit ( 26) may be included (Figure 2). However, it is not limited to the described range.

The total length of the filter for smoking articles according to an embodiment of the present invention may be 25 to 30 mm, preferably 27 mm. For example, in the case of the double filter 10, the first filter unit 12 may have a length of 9 to 15 mm, and the second filter unit 14 may have a length of 12 to 18 mm. Meanwhile, in the case of the triple filter 20, the length of the first filter unit 22 is 9 to 11 mm, the length of the second filter unit 24 is 4 to 6 mm, and the length of the third filter unit 26 is 9 to 11 mm. It may be 11 to 13 mm.

The circumference of the filter for smoking articles according to an embodiment of the present invention may be 15 mm or more and 25 mm or less, preferably 16.7 mm or more and 24.2 mm or less. For example, the circumference of the filter may be 24.2 mm for a regular cigarette, 21.7 mm for a slim cigarette, and 16.7 mm for an ultra-slim cigarette. However, it is not limited to the described range.

The filter may further contain flavoring agents. Flavoring agents include mint, chocolate, cocoa, coffee, licorice, coriander, vanillin, ethyl vanillin, maltol, ethyl maltol, eucalyptol, acetic acid, breath freshener scent, bergamot oil, rosemary, and geranium oil. , lemon oil, orange oil, lime oil, grapefruit oil, mint oil, ginger oil, isosweetener, and fruit flavor ingredients, and is not limited to the types listed above.

In the filter for smoking articles according to an embodiment of the present invention, the filter for smoking articles may further include a filter wrapper and tip paper surrounding the filter for smoking articles. As an example, Figure 3 shows a filter further including filter wrappers 18 and 28 and tip papers 19 and 29 when the filter for smoking articles is a double filter 10 or a triple filter 20.

The filter wrappers 18 and 28 may be porous and may be regular wrappers or oil-resistant wrappers.

The tip papers 19 and 29 may include perforations. Tip paper is the paper that connects the cigarette and the filter, and has perforations. Perforation plays the role of diluting the smoke component of the product by increasing the dilution rate of the cigarette. The perforation may be formed 10.5 to 11 mm from the proximal end. However, it is not limited to the described range.

By applying the above-described filter wrappers 18, 28 and tip papers 18, 28 to the filter containing the adsorbent, a smoking article with superior smoke component reduction ability can be provided.

In another embodiment of the invention, a smoking material portion comprising tobacco material; And it is possible to provide a smoking article including a filter unit according to an embodiment of the present invention.

The smoking material portion is an aerosol-forming material that releases volatile compounds when heated, and typically includes tobacco materials containing nicotine, such as leaf tobacco, and may additionally include excipients such as binders or other additives.

The tobacco material may be tobacco leaf pieces, tobacco stems, tobacco dust generated during tobacco processing, and/or leaf strips of tobacco leaves. The tobacco leaves may be at least one selected from yellow leaves, burley leaves, orient leaves, cigar leaves, and toast, but are not limited thereto.

In one embodiment of the present invention, the amount of mainstream smoke components measured when using the smoking article may be 21 to 23% by weight compared to the amount of mainstream smoke components measured when using the smoking article containing activated carbon. That is, the amount of mainstream smoke components measured when using the smoking article may be reduced by 70 to 85%, preferably 77 to 79%, compared to the amount of mainstream smoke components measured when using a smoking article containing activated carbon.

On the other hand, the amount of mainstream smoke components measured when using the smoking article is 70 to 85%, preferably 78%, compared to the amount of mainstream smoke components measured when using a smoking article using a filter containing a cavity containing nothing. It may be reduced by 80%.

For example, the smoke component may be TPM, tar, or nicotine. When using a smoking article according to an embodiment of the present invention, on average, the measured amounts of TPM and tar may be less than 3 mg/cig, and the measured amount of nicotine may be less than 0.2 mg/cig. On the other hand, when smoking articles containing activated carbon or filters containing cavities are used, on average, the measured amounts of TPM and tar may be more than 10 mg/cig, and the measured amount of nicotine may be more than 0.7 mg/cig. . This can be predicted as a result of the excellent adsorption capacity of the adsorbent made of gC ₃ N ₄ .

In another embodiment of the present invention, a method of manufacturing a filter for a smoking article can be provided, comprising a plurality of filter parts and an adsorbent, wherein the adsorbent includes gC ₃ N ₄ . The manufacturing method includes preparing an adsorbent made of gC ₃ N ₄ (S1); Step (S2) of manufacturing a filter unit by filling the adsorbent; and wrapping the filter unit with filter wrap and tip paper (S3); may include. Hereinafter, the manufacturing method will be described in detail.

The adsorbent made of gC ₃ N ₄ in step S1 may be manufactured by purging the melamine precursor in nitrogen and then reacting at 160°C to 200°C. Preferably, the reaction temperature may be 180°C.

In step S2, the adsorbent may be filled by scattering into the filter unit.

Hereinafter, the present invention will be described in more detail through examples, but the present invention is not limited to the following examples.

1.g-C ₃ N ₄ Manufacture of adsorbent consisting of

The adsorbent made of gC ₃ N ₄ was prepared by reacting the melamine precursor at 180° C. for 2 hours while purging it in nitrogen.

2. Filter design

Example 1

A triple filter (30) containing gC ₃ N ₄ was prepared (FIG. 4). The triple filter 30 includes a first filter unit 32, a second filter unit 34, and a third filter unit 36. gC ₃ N ₄ was located in the second filter unit 34. The first filter unit 32 and the third filter unit 36 were made of cellulose acetate tow. The total length of the triple filter 30 was 27 mm. The length of the first filter unit 32 was 10 mm, the length of the second filter unit 34 was 5 mm, and the length of the third filter unit 36 was 12 mm.

Comparative Example 1

It was prepared in the same manner as Example 1, except that the second filter part included activated carbon instead of gC ₃ N ₄ .

Comparative Example 2

It was manufactured in the same manner as Example 1, except that the second filter part did not contain any material (cavity).

3. Smoking article design and physical properties

The results of comparing the design and physical properties of smoking articles using Example 1 and Comparative Examples 1 and 2 are shown in Table 1 below.

4. Experimental example: Analysis of smoke components of mainstream smoke in smoking articles

The results of analyzing the components of mainstream smoke in smoking articles using Example 1 and Comparative Examples 1 and 2 are shown in Table 1 below. At this time, the smoke components of mainstream smoke during smoking were analyzed using the ISO standard standard analysis method. The average value in Table 1 below is the average of 60 results.

When using the smoking article to which Example 1 was applied, the measured amounts of TPM, tar, and nicotine were 21.97% by weight, 21.91% by weight, and 22.08% by weight, respectively, compared to the amounts of TPM, tar, and nicotine measured when using the smoking article to which Comparative Example 1 was applied. It was just that. That is, the reduction rates of TPM, tar, and nicotine were 78.03% by weight, 78.08% by weight, and 77.92% by weight, respectively.

On the other hand, when using the smoking article to which Example 1 was applied, the measured amounts of TPM, tar, and nicotine were 20.57% by weight, 20.54% by weight, and 20.48% by weight, respectively, compared to the amounts of TPM, tar, and nicotine measured when using the smoking article to which Comparative Example 2 was applied. It was only %. That is, the reduction rates of TPM, tar, and nicotine were 79.43% by weight, 79.46% by weight, and 79.52% by weight, respectively.

From the above results, it is expected that when the adsorbent of the present invention is applied to a smoking article, it is possible to provide a smoking article that is not affected by the smoker's smoking habits and is excellent in reducing smoke components of mainstream smoke.

Although the embodiments have been described with limited drawings as described above, those skilled in the art can apply various technical modifications and variations based on the above. For example, the described techniques are performed in a different order than the described method, and/or components of the described system, structure, device, circuit, etc. are combined or combined in a different form than the described method, or other components are used. Alternatively, appropriate results may be achieved even if substituted or substituted by an equivalent.

Therefore, other implementations, other embodiments, and equivalents of the claims also fall within the scope of the following claims.

10, 40: double filter
20, 30: triple filter
12, 22, 32, 42: first filter unit
14, 24, 34, 44: second filter unit
26, 36: third filter unit
18, 28: Filter paper
19, 29: Tip paper

Claims (13)

Includes a plurality of filter units and adsorbents,
A filter for smoking articles, characterized in that the adsorbent contains gC ₃ N ₄ .
According to paragraph 1,
A filter for smoking articles, characterized in that smoke components are adsorbed on the surface of the gC ₃ N ₄ .
According to paragraph 1,
The structure of gC ₃ N ₄ is any one of a sheet, particle, wire, rod or three-dimensional network, a filter for smoking articles.
According to paragraph 1,
A filter for smoking articles, wherein the average particle diameter of the gC ₃ N ₄ is 0.1 mm to 5 mm.
According to paragraph 1,
A filter for smoking articles, wherein the specific surface area of the adsorbent is 500 m ² /g to 1000 m ² /g.
According to paragraph 1,
A filter for smoking articles, wherein the TPM removal rate of the adsorbent is 75% or more.
According to paragraph 1,
The filter for smoking articles further includes at least one fiber selected from the group consisting of cellulose acetate, lyocell, polypropylene, polyester, and polylactic acid.
According to paragraph 1,
The filter for smoking articles further includes a filter wrapper and tape paper surrounding the filter for smoking articles,
The filter paper is porous,
A filter for a smoking article, wherein the tip paper includes perforations.
a smoking substances section containing tobacco substances; and
Includes a filter unit;
A smoking article, wherein the filter unit is a filter for the smoking article according to claims 1 to 8.
According to clause 9,
A smoking article in which the amount of mainstream smoke components measured when using the smoking article is reduced by 70 to 85% compared to the amount of mainstream smoke components measured when using a smoking article to which a filter containing activated carbon is applied.
A method of manufacturing a filter for a smoking article comprising a plurality of filter parts and an adsorbent, wherein the adsorbent includes gC ₃ N ₄ ,
Preparing an adsorbent made of gC ₃ N ₄ (S1);
Step (S2) of manufacturing a filter unit by filling the adsorbent; and
A method of manufacturing a filter for smoking articles, including a step (S3) of wrapping the filter unit with a filter wrapper and tip paper.
According to clause 11,
In the step S1, the adsorbent made of gC ₃ N ₄ is manufactured by purging the melamine precursor in nitrogen and then reacting at 160 ℃ to 200 ℃.
According to clause 11,
In step S2, the adsorbent is filled in the filter part by scattering.

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