A cigarette paper tube for a smoking article including a scented sheet and a smoking article

Abstract

The present invention relates to a cigarette paper tube including a flavoring sheet and a smoking article including the cigarette paper tube. More specifically, the present invention relates to a cigarette paper tube for a smoking article and a smoking article including the cigarette paper tube, the paper tube including a flavoring sheet, the flavoring sheet including a cellulose-based polymer, a plasticizer, and a flavoring substance.

Description

Technical Field

[0001] The present invention relates to a paper tube for a smoking article including a flavoring sheet, and a smoking article including the paper tube. Background Art

[0002] For a heat-not-burn tobacco rod in a smoking article, in order to release the smoking flavor from the medium part, it is necessary to use special equipment for heating. For the existing special equipment for heat-not-burn tobacco rods for releasing the smoking flavor, considering the heat transfer to the inside of the medium part, a temperature program is designed to achieve high-temperature heating. The heating temperature generally remains at the level of 200°C to 400°C. Different from traditional cigarettes that burn tobacco, a large amount of water vapor may be generated when heating the tobacco rod with the medium part by the equipment.

[0003] The heating temperature inside the medium part is below 100°C to 200°C. The airflow generated inside the medium part also maintains the corresponding temperature. Therefore, if no cooling material is provided downstream of the medium part, the smoker will inhale hot air.

[0004] The existing cooling materials for heat-not-burn tobacco rods use polymer materials (such as PLA, CA, PET, etc.) that undergo a phase change by absorbing heat in the airflow. The cooling effect is achieved by making the polymer materials into films and applying them to the entire filter rod cross-section, or a tubular filter rod made of a paper tube and cellulose acetate, etc. can be used between the most downstream part and the medium part to give inhalation resistance to the tobacco rod device, and a hollow tube part is formed to make the airflow form a vortex, thereby achieving the cooling effect.

[0005] The above polymer materials (such as PLA, CA, PET, etc.) can only be applied by melt coating. When made into sheets, they do not have flexibility, are brittle and prone to breakage, so they cannot be directly coated and can only be coated on the base paper. Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] An object of the present invention is to solve the above problems and provide a paper tube for a smoking article, which is applicable to a flavoring sheet having a cooling and flavor-enhancing effect, and can improve the quality and taste of the smoking article.

[0008] The present invention provides a smoking article including the paper tube of the present invention.

[0009] The technical problems to be solved by the present invention are not limited to the above problems, and other problems not mentioned will be clearly understood by those of ordinary skill in the art from the following description.

[0010] Means for Solving the Problems

[0011] A cigarette paper tube according to an embodiment of the present invention includes a flavoring sheet, and the flavoring sheet includes a cellulose-based polymer, a plasticizer, and a flavoring substance.

[0012] According to an embodiment of the present invention, the cellulose-based polymer may account for 20% to 60% by weight of the flavoring sheet.

[0013] According to an embodiment of the present invention, the plasticizer may account for 1% to 20% by weight of the flavoring sheet.

[0014] According to an embodiment of the present invention, the flavoring substance may account for 10% to 50% by weight of the flavoring sheet.

[0015] According to an embodiment of the present invention, the cellulose may include one or more selected from the group consisting of methyl cellulose, ethyl cellulose, carboxymethyl cellulose, carboxyethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl methyl cellulose, and agar.

[0016] According to an embodiment of the present invention, the plasticizer may include one or more selected from the group consisting of propylene glycol, polyethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, glycerol, and sorbitol.

[0017] According to an embodiment of the present invention, the draw resistance per millimeter (mm) length of the paper tube may be 0.1 mmH2O to 1.5 mmH2O.

[0018] According to an embodiment of the present invention, the thickness of the flavoring sheet may be 1 mm or less.

[0019] According to an embodiment of the present invention, the tensile strength of the flavoring sheet may be 1.0 kgf / 15 mm or more.

[0020] According to an embodiment of the present invention, the circumference of the paper tube may be 14 to 25 mm, and the length may be 5 mm or more.

[0021] A cigarette paper tube according to an embodiment of the present invention is formed of a flavoring sheet, the flavoring sheet includes a cellulose-based polymer, a plasticizer, and a flavoring substance, the thickness of the flavoring sheet is 1 mm or less, and the tensile strength of the flavoring sheet is 1.0 kgf / 15 mm or more.

[0022] A cigarette paper tube according to an embodiment of the present invention is formed of a flavoring sheet, the flavoring sheet including a cellulose-based polymer, a plasticizer, and a flavoring substance, the thickness of the flavoring sheet being 1 mm or less, the tensile strength of the flavoring sheet being 1.0 kgf / 15 mm or more, the cellulose-based polymer accounting for 20% to 60% by weight of the flavoring sheet, and the plasticizer accounting for 1% to 20% by weight of the flavoring sheet.

[0023] A smoking article according to an embodiment of the present invention includes a filter rod portion having the paper tube of the present invention.

[0024] According to an embodiment of the present invention, the smoking article is a cigarette or an electronic cigarette and is of a cigarette type.

[0025] According to an embodiment of the present invention, the filter rod portion includes: a first filter rod; a second filter rod including the paper tube; and a third filter rod including a tubular structure.

[0026] According to an embodiment of the present invention, the first filter rod includes fibrous, filamentous, or both containing at least one of a polymer, paper, cellulose acetate, activated carbon, and carbon.

[0027] Advantages of the Invention

[0028] The present invention can achieve an air flow cooling effect by adding a flavoring sheet to the paper tube and provide a flavor expression effect to improve cigarette taste and smoking flavor persistence. For example, a paper tube having a flavoring sheet is disposed downstream of the medium portion of a heat-generating cigarette rod to improve the cooling effect, cigarette taste, and smoking flavor persistence. Description of the Drawings

[0029] Figure 1 It is an exemplary drawing of a smoking article to which the paper tube of the present invention is applied according to an embodiment of the present invention.

[0030] Figure 2 It is an exemplary drawing of a smoking article to which the paper tube of the present invention is applied according to another embodiment of the present invention. Detailed Description of the Embodiments

[0031] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. When it is considered that a detailed description of related well-known functions or structures will unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted. Also, the terms in this specification are used to accurately describe the embodiments and may vary depending on the intention of the user, operator, or the convention in the technical field to which the present invention belongs. Therefore, the definition of the terms should be based on the entire content of this specification. The same reference numerals in the respective drawings denote the same components.

[0032] Throughout the specification, when a component is described as being "on" another component, this includes not only the case where one component is in contact with another component, but also the case where yet another component is present between the two components.

[0033] Throughout the specification, when a part is described as "including" a certain constituent element, it may also include other constituent elements without excluding the possibility of the existence of other constituent elements.

[0034] Hereinafter, the cigarette paper tube of the present invention and the smoking article including the paper tube will be described in detail with reference to embodiments and the drawings. However, the present invention is not limited to these embodiments and the drawings.

[0035] The present invention relates to a cigarette paper tube for a smoking article, the paper tube may include a flavoring sheet containing a cellulose-based polymer, a plasticizer, and a flavoring substance, the flavoring sheet is in the shape of a film and can contain the flavoring substance within the cellulose-based polymer, thereby improving the persistence of the flavor and / or cigarette taste transferred in the smoking article. In addition, for example, in a smoking article such as a cigarette rod, the cellulose-based polymer undergoes a phase change (e.g., crystallization) only at the temperature of the air flow moving to the smoker (e.g., high temperature), so an air flow cooling effect can be provided. And, since the flavoring sheet has a strong tensile strength and is flexible, it does not need to be coated on the base paper and can itself be used as part of a cigarette paper tube or a filter rod of a cigarette paper tube.

[0036] According to an embodiment of the present invention, the "smoking article" can be any product that can be inhaled or any product that provides a smoking experience, whether it is based on cigarettes, tobacco derivatives, expanded tobacco, reconstituted tobacco, or cigarette substitutes. For example, the smoking article can refer to an inhalable product that can generate an aerosol, such as a cigarette, a cigar, a cigarillo, an electronic cigarette (e.g., a heat-not-burn type), etc. The smoking article can include an aerosol-generating substance or an aerosol-generating matrix. And, the smoking article can include solid substances based on tobacco raw materials such as reconstituted tobacco, cut tobacco, and reconstituted tobacco. Or, the smoking article can include volatile compounds.

[0037] According to an embodiment of the present invention, the cellulose-based polymer is an adhesive material and also provides a polymer matrix for forming a sheet that retains flavor substances, is flexible, and has high tensile strength. For another example, the cellulose-based polymer can also be used together with a solvent (such as water) and alcohol that are used to dissolve and / or disperse components for film formation and / or sheet formation. For example, the cellulose-based polymer can include at least one selected from the group consisting of methylcellulose, ethylcellulose, carboxymethylcellulose, carboxyethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, hydroxyethylmethylcellulose, and agar, but is not limited thereto. Preferably, it can be methylcellulose and hydroxypropylmethylcellulose.

[0038] According to an embodiment of the present invention, the cellulose-based polymer is 20% to 60% by weight, 20% to 50% by weight, or 30% to 40% by weight in the flavor-added sheet. When the content of the cellulose-based polymer is less than 20% by weight, it is difficult to have sufficient tensile strength and flexibility to be used as part of a paper tube or a paper tube filter rod by itself, or it is difficult to form a sheet; when it exceeds 60% by weight, physical changes (such as breaking or cracking) will occur with the sheet, and the flavor substances in the sheet cannot release the fragrance well, making it difficult to improve the cigarette taste and the persistence of the smoking flavor.

[0039] According to an embodiment of the present invention, the flavor substance can release fragrance and / or impart fragrance characteristics, or can improve the smoking flavor, and any flavor substance that can be used in smoking articles can be used without limitation. It can include one or more selected from the group consisting of organic acids such as lactic acid, citric acid, and malic acid, licorice, sucrose, fructose syrup, iso-sweetener (isosweet), cocoa, lavender, cinnamon, cardamom, celery, fenugreek, bitterbark, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, peppermint oil, cinnamon, celery seed, cognac, jasmine, chamomile, menthol, cinnamon, ylang-ylang, danshen, spearmint, ginger, coriander, clove extract (or clove substance), and coffee, but is not limited thereto.

[0040] According to an embodiment of the present invention, the flavor substance is 10% to 50% by weight, 10% to 40% by weight, 10% to 30% by weight, or 10% to 20% by weight in the flavor-added sheet. When the content of the flavor substance is within the above range, it can improve the mobility of the fragrance and / or the persistence of the cigarette taste, achieve a high concentration, and moreover, the fragrance and / or fragrance intensity can be adjusted by adding the concentration.

[0041] According to an embodiment of the present invention, the plasticizer may include one or more selected from the group consisting of propylene glycol, polyethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, glycerol, and sorbitol, but is not limited thereto. Preferably, it may be propylene glycol and glycerol.

[0042] According to an embodiment of the present invention, in order to adjust the hardness of the flavoring sheet, the plasticizer is 1% to 20% by weight, 1% to 15% by weight, 1% to 10% by weight, or 5% to 10% by weight of the flavoring sheet. When the content of the plasticizer is less than 1% by weight, it is difficult to have a suitable tensile strength to be used as a part of a paper tube or a paper tube filter rod of a smoking article, or the elongation rate is too low to have flexibility; when the content of the plasticizer exceeds 20% by weight, due to poor physical properties of the sheet (such as too low tensile strength or too soft), tearing is likely to occur, and it is difficult to make a paper tube filter rod of a smoking article.

[0043] According to an embodiment of the present invention, the thickness of the flavoring sheet is 1 mm or less, 0.1 mm to 1 mm, 0.1 mm to 0.8 mm, or 0.2 mm to 0.5 mm, and the flavoring sheet may be single-layer or multi-layer. When the thickness of the flavoring sheet exceeds 1 mm, the flexibility of the sheet cannot be well achieved, it is difficult to make a paper tube of a smoking article, and the flavor cannot be well released due to the increased thickness; if the flavoring sheet is too thin, the cooling effect may not be achieved.

[0044] According to an embodiment of the present invention, the flavoring sheet has sufficient tensile strength so that it can be used as a part of a paper tube or a paper tube filter rod of a smoking article by itself. For example, the tensile strength of the flavoring sheet is 1.0 kgf / 15 mm or more, 2.0 kgf / 15 mm or more, 5.0 kgf / 15 mm or more, or 1.0 kgf / 15 mm to 10 kgf / 15 mm. When the tensile strength is within the above range, a flavoring sheet with a balance of hardness and flexibility suitable for the base paper of a paper tube for smoking articles can be provided.

[0045] According to an embodiment of the present invention, the suction resistance per millimeter (mm) length of the paper tube may be 0.1 mmH2O to 1.5 mmH2O. When included within the range of the suction resistance, the smoke can flow smoothly during smoking, and the cigarette flavor and the persistence of the smoking taste can be improved.

[0046] According to an embodiment of the present invention, the circumference of the paper tube may be 14 mm to 25 mm, 14 mm to 20 mm, or 14 mm to 18 mm, and the length may be 5 mm or more, 10 mm or more, 10 mm to 20 mm, or 10 mm to 15 mm.

[0047] According to an embodiment of the present invention, the paper tube can be used as a part of a smoking article, for example, it can be used as a paper tube filter rod, which will be specifically described in the smoking article below.

[0048] The present invention relates to a smoking article including the paper tube of the present invention.

[0049] According to an embodiment of the present invention, the smoking article may include a filter rod part and a smoking material part. The filter rod part may include the flavoring sheet of the present invention. For example, the cooling and flavor releasing effects can be provided by using a paper tube filter rod of a paper tube having the flavoring sheet applicable to the present invention. That is, the paper tube applicable to the flavoring sheet can form the air flow into a vortex while absorbing heat to more easily achieve the cooling effect.

[0050] According to an embodiment of the present invention, the filter rod part may be a two-piece filter rod or a three-piece filter rod. And, the filter rod part may include at least one of a porous matrix structure filter rod, a tubular structure filter rod (hollow tube filter), and a paper tube filter rod.

[0051] According to an embodiment of the present invention, the two-piece filter rod may include a first filter rod and a second filter rod, and the second filter rod may include the paper tube filter rod of the present invention.

[0052] According to an embodiment of the present invention, the three-piece filter rod may include a first filter rod, a second filter rod including the paper tube, a tubular filter rod or a woven structure filter rod, and a third filter rod including the paper tube, a tubular filter rod or a woven structure filter rod. The first filter rod is in the direction (downstream direction) close to the smoker in the heat-not-burn cigarette rod, and the second filter rod and the third filter rod are sequentially in the direction (upstream direction) away from the smoker.

[0053] According to an embodiment of the present invention, the paper tube filter rod includes a paper tube having the flavoring sheet of the present invention. The flavoring sheet may include a cellulose-based polymer, a plasticizer, and a flavor substance. The flavoring sheet can contain the flavor substance in the cellulose-based polymer in a film shape, thereby improving the persistence of the transferred flavor and / or cigarette taste in the smoking article. In addition, for example, in a smoking article such as a cigarette rod, the cellulose-based polymer only undergoes a phase change (such as crystallization) at the temperature of the air flow moving to the smoker (such as high temperature), so the air flow cooling effect can be provided. And, since the flavoring sheet has strong tensile strength and flexibility, it does not need to be coated on the base paper, and it itself can be used as a part of the paper tube or the paper tube filter rod.

[0054] According to an embodiment of the present invention, the cellulose-based polymer is an adhesive material and also provides a polymer matrix for forming a sheet that retains flavor substances, is flexible, and has strong tensile strength. For another example, the cellulose-based polymer can also be used together with a solvent (such as water) and alcohol that are used to dissolve and / or disperse components for film formation and / or sheet formation. For example, the cellulose-based polymer can include at least one selected from the group consisting of methylcellulose, ethylcellulose, carboxymethylcellulose, carboxyethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, hydroxyethylmethylcellulose, and agar, but is not limited thereto. Preferably, it can be methylcellulose and hydroxypropylmethylcellulose.

[0055] According to an embodiment of the present invention, the cellulose-based polymer is 20% to 60% by weight, 20% to 50% by weight, or 30% to 40% by weight in the flavor-added sheet. When the content of the cellulose-based polymer is less than 20% by weight, it is difficult to have sufficient tensile strength and flexibility to be used as part of a paper tube or a paper tube filter rod by itself, or it is difficult to form a sheet; when it exceeds 60% by weight, physical changes (such as breaking or cracking) will occur in the sheet, and the flavor substances in the sheet cannot release the flavor well, making it difficult to improve the cigarette taste and the persistence of the smoking flavor.

[0056] According to an embodiment of the present invention, the flavor substance can release flavor and / or impart flavor characteristics, or can improve the smoking flavor, and any flavor substance that can be used in smoking articles can be used without limitation. It can include one or more selected from the group consisting of organic acids such as lactic acid, citric acid, and malic acid, licorice, sucrose, high fructose syrup, iso-sweetener, cocoa, lavender, cinnamon, cardamom, celery, fenugreek, bitterbark, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, peppermint oil, cinnamon, caraway seed, cognac, jasmine, chamomile, menthol, cinnamon, ylang-ylang, salvia miltiorrhiza, spearmint, ginger, coriander, clove extract (or clove substance), and coffee, but is not limited thereto.

[0057] According to an embodiment of the present invention, the flavor substance is 10% to 50% by weight, 10% to 40% by weight, 10% to 30% by weight, or 10% to 20% by weight of the flavor-added sheet. When the content of the flavor substance is within the above range, it can improve the persistence of the moving flavor and / or the cigarette taste, achieve a high concentration. Moreover, the flavor and / or flavor intensity can be adjusted by adding the concentration.

[0058] According to an embodiment of the present invention, the plasticizer may include one or more selected from the group consisting of propylene glycol, polyethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, glycerol, and sorbitol, but is not limited thereto. Preferably, it may be propylene glycol and glycerol.

[0059] According to an embodiment of the present invention, in order to adjust the hardness of the flavoring sheet, the plasticizer is 1 wt% to 20 wt%, 1 wt% to 15 wt%, 1 wt% to 10 wt%, or 5 wt% to 10 wt% in the flavoring sheet. When the content of the plasticizer is less than 1 wt%, it is difficult to have a suitable tensile strength to be used as a part of a cigarette paper tube or a paper tube filter rod, or the elongation rate is too low to have flexibility; when the content of the plasticizer exceeds 20 wt%, due to poor physical properties of the sheet (such as too low tensile strength or too soft), tearing is likely to occur, and it is difficult to make a paper tube filter rod for a cigarette.

[0060] According to an embodiment of the present invention, the thickness of the flavoring sheet is 1 mm or less, 0.1 mm to 1 mm, 0.1 mm to 0.8 mm, or 0.2 mm to 0.5 mm, and the flavoring sheet may be single-layer or multi-layer. When the thickness of the flavoring sheet exceeds 1 mm, the flexibility of the sheet cannot be well achieved, it is difficult to make a cigarette paper tube or a paper tube filter rod, and the fragrance cannot be well released due to the increase in thickness; if the flavoring sheet is too thin, the cooling effect may not be achieved.

[0061] According to an embodiment of the present invention, the flavoring sheet has sufficient tensile strength so that it can be used as a part of a cigarette paper tube or a paper tube filter rod by itself. For example, the tensile strength of the flavoring sheet is 1.0 kgf / 15 mm or more, 2.0 kgf / 15 mm or more, 5.0 kgf / 15 mm or more, or 1.0 kgf / 15 mm to 10 kgf / 15 mm. When the tensile strength is within the above range, a flavoring sheet with a balance of hardness and flexibility suitable for the base paper of a cigarette paper tube can be provided.

[0062] According to an embodiment of the present invention, the suction resistance per millimeter (mm) length of the paper tube or the paper tube filter rod may be 0.1 mmH2O to 1.5 mmH2O. When included within the suction resistance range, the smoke can flow smoothly during smoking, and the cigarette taste and the persistence of the smoking taste can be improved.

[0063] According to an embodiment of the present invention, the circumference of the paper tube or the paper tube filter rod may be 14 mm to 25 mm, 14 mm to 20 mm, or 14 mm to 18 mm, and the length may be 5 mm or more, 10 mm or more, 10 mm to 20 mm, or 10 mm to 15 mm.

[0064] According to an embodiment of the present invention, with reference to Figures 1 to 2 , the smoking article may be a cigarette or an electronic cigarette, and may be of a cigarette type. That is, an air flow cooling effect, release of fragrance, improvement of the taste of the cigarette, and persistence of the smoking flavor can be achieved through a flavoring tablet. That is, by applying a flavoring tablet in a paper tube having a cooling effect, an air flow can form a vortex, and at the same time, heat is absorbed to more easily achieve the cooling effect.

[0065] According to an embodiment of the present invention, with reference to Figure 1 , the smoking article may be a three-piece filter rod, including a first filter rod 110, a second filter rod 120 including a paper tube having the flavoring tablet of the present invention, and a third filter rod 130 including a woven structure filter rod or a tubular filter rod. The filter rod part cools the air flow flowing along the air flow moving direction from the smoking material part 140, and at the same time, releases fragrance and / or aroma through the flavoring tablet.

[0066] According to an embodiment of the present invention, the lengths of the first filter rod part 110, the second filter rod part 120, the third filter rod part 130, and the smoking material part 140 may be respectively selected from 10 mm to 20 mm, or 10 mm to 15 mm.

[0067] According to an embodiment of the present invention, with reference to Figure 2 , the smoking article may be a three-piece filter rod, including a first filter rod 210, a second filter rod 220 including a woven structure filter rod or a tubular filter rod, and a third filter rod 230 including a paper tube having the flavoring tablet of the present invention. The filter rod part cools the air flow flowing along the air flow moving direction from the smoking material part 240, and at the same time, releases fragrance and / or aroma through the flavoring tablet.

[0068] According to an embodiment of the present invention, the lengths of the first filter rod part 210, the second filter rod part 220, the third filter rod part 230, and the smoking material part 240 may be respectively selected from 10 mm to 20 mm, or 10 mm to 15 mm.

[0069] According to an embodiment of the present invention, the paper tube filter rod has the flavoring tablet of the present invention, and the inner wall of the tubular filter rod may further be applied with the flavoring tablet of the present invention. And, the woven structure filter rod may include polymer fibers, fibers cut from the flavoring tablet of the present invention, or both. For example, the polymer may be poly lactic acid (PLA), cellulose acetate (CA), poly(ethylene terephthalate) (PET), etc.

[0070] According to an embodiment of the present invention, the first filter rod is a filter rod tow well-known in the field to which the present invention pertains. For example, it may include a fibrous, filamentous, or both filter rod tow containing at least one of a polymer, paper, cellulose acetate, activated carbon, and carbon, but is not limited thereto.

[0071] According to an embodiment of the present invention, the smoking material part may include tobacco raw materials such as cut tobacco, and a matrix that generates a smoking flavor and aerosol, which can be configured according to the type of the smoking article.

[0072] According to an embodiment of the present invention, the diameter of the smoking article may be 4 mm to 10 mm, and the circumference may be 14 mm to 29 mm. Moreover, its length may be 45 mm to 100 mm.

[0073] Although the above-described embodiments are described based on limited embodiments and drawings, various modifications and changes can be made by those of ordinary skill in the art based on the above description. For example, if the described technology is executed in a sequence different from the described method, and / or if the described components are combined or assembled in a different form, or replaced or substituted by other components or equivalents, appropriate results can also be obtained. Therefore, other embodiments, other implementations, and equivalents of the claims all fall within the scope of the appended claims.

Claims

1. A paper tube for a smoking article, characterized in that, the paper tube is formed by a flavoring sheet, the flavoring sheet includes a cellulose-based polymer, a plasticizer, and a flavoring substance, the thickness of the flavoring sheet is below 1 mm, the tensile strength of the flavoring sheet is 1.0 kgf / 15 mm or more, the cellulose-based polymer accounts for 20% to 60% by weight of the flavoring sheet, the plasticizer accounts for 1% to 20% by weight of the flavoring sheet.

2. The paper tube for a smoking article according to claim 1, characterized in that, the flavoring substance accounts for 10% to 50% by weight of the flavoring sheet.

3. The paper tube for a smoking article according to claim 1, characterized in that, the cellulose-based polymer includes at least one selected from the group consisting of methyl cellulose, ethyl cellulose, carboxymethyl cellulose, carboxyethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, and hydroxyethyl methyl cellulose.

4. The paper tube for a smoking article according to claim 1, characterized in that, the plasticizer includes at least one selected from the group consisting of propylene glycol, polyethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, glycerol, and sorbitol.

5. The paper tube for a smoking article according to claim 1, characterized in that, the inhalation resistance per millimeter length of the paper tube is 0.1 mmH2O to 1.5 mmH2O.

6. The paper tube for a smoking article according to claim 1, characterized in that, the circumference of the paper tube is 14 mm to 25 mm, and the length is 5 mm or more.

7. A smoking article, characterized in that, it includes a filter rod part having the paper tube according to claim 1.

8. The smoking article according to claim 7, characterized in that, the smoking article is a cigarette or an electronic cigarette, and is of a cigarette type.

9. The smoking article according to claim 7, characterized in that, the filter rod part includes: a first filter rod; a second filter rod, including the paper tube; and a third filter rod, including a tubular structure.

10. The smoking article according to claim 9, characterized in that, the first filter rod includes at least one of a polymer, paper, and carbon, and the polymer, paper, and carbon are in a long filament shape.

11. The smoking article according to claim 10, characterized in that, the polymer is cellulose acetate, and the carbon is activated carbon.

Images