Cigarette wrapping paper, smoking article, and method for manufacturing cigarette wrapping paper

Abstract

Provided are a cigarette wrapper including a nanocellulose film, a smoking article including the same, and a method of manufacturing a cigarette wrapper including a nanocellulose film. Thereby, generation of a paper odor and a burnt odor of a paper cigarette wrapper used in a model can be minimized, a smoker's discomfort can be reduced, and satisfaction with smoking can be improved.

Description

Technical Field

[0001] This invention relates to a cigarette packaging paper using a nanocellulose membrane, tobacco products including the same, and a method for manufacturing the cigarette packaging paper. Background Technology

[0002] Generally speaking, tobacco refers to a perennial plant belonging to the Solanaceae family of dicotyledonous plants. However, recently it has also come to refer to a product manufactured for smoking, in which tobacco leaves are wrapped in cigarette paper and have a filter on one side. There are thousands of such tobacco products worldwide, distributed in various shapes and forms.

[0003] A cigarette consists of a stem and at least one filter. The cigarette is then wrapped in paper (wrapping paper). Currently used paper cigarette paper is a blend of various components other than cellulose, such as lignin and hemicellulose.

[0004] The paper cigarette paper used in traditional cigarettes and / or e-cigarettes, due to its unique materials and the mixture of various other components besides cellulose (especially lignin, hemicellulose, etc.), produces an unpleasant odor known as "paper odor" when smoked, giving consumers an unpleasant experience. The aerosol-generating products (sticks) used in e-cigarettes also produce fumes and a "burning smell" during heating, which, along with the "paper odor," contributes to the unpleasant experience for consumers.

[0005] However, in the manufacturing process of this type of cigarette paper, it is difficult to completely remove the aforementioned components from the wood pulp bleaching process and obtain only pure cellulose. In addition, since cellulose exists in a mixed state of crystalline and amorphous structures, its crystallinity is extremely low, resulting in low tensile strength compared to other polymer films.

[0006] Therefore, research is needed to reduce the papery odor produced by cigarette paper in order to alleviate smokers' discomfort. Summary of the Invention

[0007] The problem the invention aims to solve

[0008] Therefore, in order to overcome the above-mentioned problems and / or limitations of the prior art, the object of the present invention is to provide a cigarette packaging paper using a nanocellulose film and tobacco products including therein.

[0009] However, the technical problem to be solved by the present invention is not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art through the following description.

[0010] means for solving problems

[0011] According to one embodiment, a cigarette packaging paper comprising a nanocellulose membrane is provided.

[0012] According to one aspect, a smoking article is provided, which includes a tobacco medium portion, a filter portion, and a wrapping paper, wherein the wrapping paper is a wrapping paper including a nanofiber cellulose membrane.

[0013] According to another aspect of the present invention, a method for manufacturing cigarette packaging paper including a nanocellulose membrane is provided, comprising: a first step of bleaching wood pulp; a second step of agitating a fluid containing cellulose from the bleached wood pulp under high pressure and converting it into nanoparticles; and a third step of coating and drying the nanoparticle fluid to obtain a nanocellulose membrane.

[0014] According to another aspect of the present invention, a method for manufacturing cigarette packaging paper including a nanocellulose membrane is provided, comprising: a step of bleaching wood pulp; b step of physically dispersing a fluid containing cellulose from the bleached wood pulp; c step of treating with sulfuric acid or 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) to obtain a nanoparticle dispersion; and d step of coating and drying the nanoparticle dispersion to obtain a nanocellulose membrane.

[0015] Invention Effects

[0016] According to one aspect of the present invention, the cigarette packaging paper using nanocellulose film can not only reduce the papery odor in traditional cigarettes, but also, in electronic cigarettes, reduce unpleasant odors by preventing oil fumes during the heating process due to the high heat resistance of the film.

[0017] In addition, it can be derived from the same raw materials as paper (wood, plants, etc.). Since its composition also has the same biodegradability of cellulose as paper, it can maintain environmental friendliness. At the same time, through the nanoparticleization of cellulose, it can also have new properties, such as high tensile strength and high heat resistance.

[0018] The effects of the present invention are not limited to those described above, and should be understood to include all effects that can be inferred from the settings of the present invention as described in the detailed description or claims of the present invention. Attached Figure Description

[0019] Figure 1 The accompanying drawings illustrate the use of packaging paper comprising a nanocellulose film according to an embodiment of the present invention for use in conventional cigarettes in place of existing cigarette paper.

[0020] Figure 2 The accompanying drawing shows a final outer shell of an aerosol-generating article (stick) for an existing electronic cigarette, which uses a packaging paper comprising a nanocellulose membrane according to an embodiment of the present invention. Detailed Implementation

[0021] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, various modifications can be made to the embodiments, and the scope of the present invention is not limited or restricted by the embodiments. All variations, equivalents, or substitutions of the embodiments are included within the scope of the claims.

[0022] The terminology used in the embodiments is for illustrative purposes only and is not intended to limit the embodiments. Unless otherwise specified in the content, a single type may include multiple types. In this specification, terms such as "comprising" or "having" are used to indicate the presence of the features, numbers, steps, operations, constituent elements, accessories, or combinations thereof described in the specification, and do not exclude the presence of one or more other features, numbers, steps, operations, constituent elements, accessories, or combinations thereof, or additional functions.

[0023] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the ordinary meaning as understood by one of ordinary skill in the art. Terms that are commonly used and are identical to their dictionary definitions should be understood to have meanings consistent with the general content of the relevant art, and should not be overly idealized or interpreted as having a formal meaning unless explicitly mentioned in this application.

[0024] Furthermore, in the description with reference to the accompanying drawings, identical constituent elements are assigned the same reference numerals, regardless of the drawing references, and repeated descriptions of these elements are omitted. In describing embodiments, detailed descriptions of relevant well-known technologies are omitted when it is determined that such detailed descriptions would unnecessarily obscure the embodiments.

[0025] Furthermore, in the description of the components of the embodiments, terms such as first, second, A, B, (a), (B) may be used. These terms are used only to distinguish one constituent element from another, and the nature, sequence, or order of the constituent elements is not limited by these terms.

[0026] Elements included in one embodiment and elements having common functions may be described using the same names in another embodiment. Unless otherwise stated, the description of one embodiment may be applied to other embodiments, and detailed descriptions will be omitted to the extent of repetition.

[0027] In this article, "smoking products" can refer to items that can generate aerosols, such as cigarettes and cigars. Smoking products may include aerosol-generating substances or aerosol-forming matrices. Additionally, smoking products may include solid materials based on tobacco raw materials, such as leaf tobacco, shredded tobacco, and reconstituted tobacco. Smoking products may contain volatile compounds.

[0028] Furthermore, throughout the instructions, "upstream" or "upstream direction" refers to the direction away from the smoker's mouth, while "downstream" or "downstream direction" refers to the direction closer to the smoker's mouth. For example, in Figure 1 In the smoking product shown, the medium part 003 is located upstream of or in the upstream direction of the filter part 002.

[0029] Furthermore, the term "aerosol generation system" as used herein can refer to an aerosol generation device that uses an aerosol generation matrix to generate aerosols, wherein the aerosols can be directly inhaled into the lungs of a user through their mouth. An aerosol generation system is a non-combustible tobacco product that is indirectly heated by electrical energy rather than directly burned. Non-combustible tobacco products include both heated and unheated tobacco products. In the case of heated tobacco products, aerosols are generated by inhaling ambient air heated by electrical energy, and the aerosols are inhaled and then released by the user, thereby enabling smoking. In addition, various types of aerosol generation devices may be included, and the scope of this disclosure is not limited to the examples described above.

[0030] According to one embodiment of the present invention, a cigarette packaging paper comprising a nanocellulose membrane is provided.

[0031] The nanocellulose membrane included in the cigarette packaging paper of one embodiment of the present invention has a high cellulose content and an almost pure cellulose crystal structure. Therefore, although it is a cellulose material like paper, it has different physical properties and can exhibit strong tensile strength and high heat resistance due to the strong hydrogen bonds between the crystal structures.

[0032] Furthermore, since nanocellulose consists of up to 90% pure crystalline particles, when films made from it replace existing cigarette paper, the source of paper odor is removed, thereby reducing unpleasant smells caused by paper odor.

[0033] Furthermore, when used in electronic cigarettes, it exhibits superior heat resistance due to the strong bonds and crystal structure between nanoparticles, exceeding that of traditional paper. This prevents material carbonization and reduces combustion odor.

[0034] Furthermore, the thickness of the nanocellulose film constituting the cigarette packaging paper according to an embodiment of the present invention can be 5 to 150 μm, preferably 10 to 100 μm, and more preferably 10 to 50 μm. When the nanocellulose film has the above-mentioned numerical range, it can effectively maintain the shape of the smoking article, and in particular, can prevent leakage of the tobacco medium portion (e.g., the tobacco shred portion). Furthermore, as... Figure 2 As shown, when cigarette packaging wraps the entire smoking product, it can reduce the leakage of liquid components such as humectants to the outside.

[0035] In addition, the nanocellulose membrane may include one or more nanocellulose nanofibers and cellulose nanocrystals, and when the cellulose nanofibers or cellulose nanocrystals are used alone as the nanocellulose membrane, their respective crystallinity can be above 80%.

[0036] If the crystallinity is less than the above range, it means that the nanocellulose formation is not well carried out under the existing wood pulp and other conditions. As a result, the formation of cellulose nanoparticles is not well carried out. In this case, it is difficult to exhibit the inherent properties of nanocellulose, such as high tensile strength, strong bonds between nanoparticles, and arrangement.

[0037] In addition, cigarette packaging paper including the nanocellulose membrane may include individual additives, and the additives may include at least one of fillers and flame retardants.

[0038] The filler improves whiteness or opacity, adjusts porosity, and enhances tactile feel and printability. It also reduces paper odor. An example of such a filler is calcium carbonate (CaCO3).

[0039] In addition, the flame retardant can promote or inhibit combustion, and examples of such flame retardants include sodium citrate or potassium citrate.

[0040] By including both the filler and the flame retardant, the flavor, flammability, fire extinguishing properties, and manufacturability of the cigarette can be ensured.

[0041] According to another embodiment of the present invention, a smoking article is provided, comprising a tobacco medium portion, a filter portion, and a wrapping paper, wherein the wrapping paper is a wrapping paper comprising a nanofiber cellulose membrane.

[0042] The tobacco medium portion typically includes nicotine-containing tobacco material, such as tobacco leaves, and may also include excipients, such as binders or other additives and flavorings. As an example, the tobacco medium included in the tobacco medium portion of the present invention can be prepared in the form of particles containing tobacco material and excipients.

[0043] In this invention, the tobacco material, as an aerosol-generating substance, can be tobacco leaves, tobacco stems, smoke generated during tobacco processing, and / or tobacco strips. The tobacco leaves can be at least one selected from yellow tobacco, burley tobacco, oriental tobacco, cigar tobacco, and flue-cured tobacco, but are not limited thereto.

[0044] Additionally, the filter tip may include a capsule containing fragrance, or may further include a humectant, etc.

[0045] Furthermore, the packaging paper of a smoking product according to an embodiment of the present invention may include tobacco medium packaging paper, filter tip packaging paper, tipping paper, etc., and since it can effectively reduce the papery odor or pungent smell produced by traditional cigarettes and e-cigarettes during smoking, it is preferable that the packaging paper including the nanocellulose membrane is tobacco medium packaging paper or packaging paper of a smoking product.

[0046] Furthermore, as described above, since the smoking article according to an embodiment of the present invention is used as a stick for a conventional cigarette or an electronic cigarette, it can correspond to a combustible or non-combustible heated cigarette.

[0047] A method for manufacturing cigarette packaging paper according to an embodiment of the present invention will now be described.

[0048] Cigarette wrapping paper including the nanocellulose of the present invention can be prepared by a physical method including the following first to third steps or a to d steps:

[0049] First step: Bleaching wood pulp;

[0050] The second step involves colliding a fluid containing cellulose from the bleached wood pulp under high pressure, transforming it into nanoparticles; and

[0051] Third step: Apply and dry the nanoparticle fluid to obtain a nanocellulose membrane.

[0052] Step a: Bleaching wood pulp;

[0053] Step b: Physically disperse the fluid containing the cellulose of the bleached wood pulp;

[0054] Step c: Treat with sulfuric acid or 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) to obtain a nanoparticle dispersion; and

[0055] Step d: Apply and dry the nanoparticle dispersion to obtain a nanocellulose membrane.

[0056] Generally, for wood pulp mainly composed of large cellulose blocks, bleaching can decolorize it and partially reduce, but not completely remove, the hemicellulose mixed components such as lignin, mannose, and xylose. However, as described in steps one through three or steps a through d above, in addition to bleaching, during nanoparticle formation, most other mixed components such as amorphous cellulose, lignin, and hemicellulose are removed, except for pure cellulose crystals. Therefore, while cellulose remains the main component, similar to cigarette paper, the film made from nanocellulose with other mixed components removed possesses tensile strength and biodegradability.

[0057] In addition, by performing the second step or steps b and c, the cellulose can be physically or chemically pulverized into small sizes, such as nanoparticles, and the nanocellulose in the third step or step d can be applied in the same manner as general polymer film preparation methods.

[0058] As an example of a method for preparing a polymer film, one or more methods selected from the group consisting of drop casting, roll casting, blade coating and bar coating can be used. The examples listed above are merely representative examples, and the present invention is not limited thereto. Any method that involves thinly coating a material dispersion over a large area and then maintaining the shape by forming bonds between nanoparticles through a drying process is acceptable.

[0059] In addition, since nanocellulose dispersions can be prepared in a water-soluble form, unlike petroleum-based polymers that use other organic solvents, they have the advantages of both stability and eco-friendliness during operation. Furthermore, nanocellulose membranes prepared in this way can be easily applied to the production process of cigarettes and e-cigarette products simply by cutting the rolls to the width and length used in traditional cigarette paper production.

[0060] In summary, the embodiments have been described with reference to limited examples and accompanying drawings. Those skilled in the art can make various modifications and variations to the above description. For example, the described techniques may be performed in a different order than the described methods, and / or the described constituent elements may be combined or integrated in a different form than the described methods. Alternatively, the same effect can be obtained by replacing or substituting other constituent elements or equivalents.

[0061] Therefore, all other embodiments, other implementations, and equivalents of the claims fall within the scope of the patent claims.

[0062] Explanation of reference numerals in the attached figures:

[0063] 001: Nanocellulose membrane

[0064] 002, 004, 005: Filter tip section

[0065] 003: Medium Section

Claims

1.A cigarette wrapping paper comprising a nanocellulose film, characterized in that, the nanocellulose film has a thickness of 5 to 150 μm, the nanocellulose film comprises one or more kinds of nanocellulose selected from the group consisting of cellulose nanofiber and cellulose nanocrystal, the cellulose nanofiber and the cellulose nanocrystal have a crystallinity of 80% or more. 2.The cigarette wrapping paper according to claim 1, characterized in that, the cigarette wrapping paper comprises one or more kinds of filler and flame retardant. 3.The cigarette wrapping paper according to claim 2, characterized in that, the filler is calcium carbonate, the flame retardant is sodium citrate or potassium citrate. 4.A smoking article comprising a tobacco medium portion, a filter portion, and a cigarette wrapping paper, characterized in that, the cigarette wrapping paper is the cigarette wrapping paper according to claim 1. 5.The smoking article according to claim 4, characterized in that, the wrapping paper comprising the nanocellulose film is a tobacco medium portion wrapping paper or a wrapping paper wrapping the entire smoking article. 6.The smoking article according to claim 4, characterized in that, the filter portion comprises a capsule containing a humectant or a flavoring agent. 7.The smoking article according to claim 4, characterized in that, the smoking article is a combustible cigarette or a non-combustible heat-type cigarette. 8.A method of manufacturing the cigarette wrapping paper according to claim 1, characterized in that, comprising: a first step of bleaching wood pulp; a second step of colliding a fluid containing cellulose of the bleached wood pulp under high pressure and converting into nanoparticles; and a third step of coating and drying the nanoparticle fluid to obtain a nanocellulose film. 9.A method of manufacturing the cigarette wrapping paper according to claim 1, characterized in that, comprising: a step a of bleaching wood pulp; a step b of physically dispersing a fluid containing cellulose of the bleached wood pulp; a step c of treating sulfuric acid or 2,2,6,6-tetramethyl-1-piperidinyloxy to obtain a nanoparticle dispersion liquid; and a step d of coating and drying the nanoparticle dispersion liquid to obtain a nanocellulose film. 10.The method of manufacturing the cigarette wrapping paper according to claim 9, characterized in that, the step d uses one or more kinds of method selected from the group consisting of drop coating, roll coating, blade coating, and bar coating.

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