Cigarette packaging material and cigarette case including same

Abstract

The present invention relates to an eco-friendly cigarette packaging material having excellent physical properties. According to one aspect, provided are: a cigarette packaging material comprising polyolefin and calcium carbonate; and a cigarette case including the cigarette packaging material.

Description

Packaging materials for cigarettes and cigarette cases containing the same

[0001] The present disclosure relates to a packaging material for cigarettes, and more particularly, to a packaging material for cigarettes and a cigarette case including the same.

[0002] In the tobacco manufacturing process, when cigarettes are packaged in units of two or more packs, a method is used in which the cigarettes supplied in the number of cigarettes equivalent to one pack are wrapped with an inner liner and then wrapped on the outside with a pack wrapping paper.

[0003] Meanwhile, the outer packaging and inner liner are typically made of paper. This paper is characterized by being made from pulp produced by mechanically or chemically treating wood or other plant materials.

[0004] In general, when using paper as packaging material for cigarettes, there was a problem of forest damage due to the manufacturing process that required mechanical or chemical treatment of wood or other plants, and because paper packaging material contained bleaching agents, there was a problem of causing damage such as redness or burns when in contact with the skin.

[0005] In the case of inner liners made of paper, there was a problem that the moisture and fragrance contained in the glue were excessively absorbed due to the characteristic of very high moisture permeability, and the moisture content and fragrance retention properties of the glue were not maintained, and there was a problem that the dead fold performance, which is the property of maintaining the folded shape after the folding process in the packaging machine, was not sufficiently expressed.

[0006] Additionally, in the case of paper-based packaging, there was a problem that the packaging would easily become wet due to the high moisture permeability of the paper, and that bleaching agents were added to achieve whiteness, which had a harmful effect on the human body and the environment.

[0007] According to one aspect of the present invention, a packaging material for cigarettes is provided that is environmentally friendly and harmless to the human body due to its high biodegradability.

[0008] According to another aspect of the present invention, a cigarette packaging material having properties suitable for use as an inner liner or a wrapper is provided.

[0009] According to another aspect of the present invention, a packaging material for cigarettes is provided having improved smoothness and excellent printability.

[0010] According to another aspect of the present invention, a cigarette case including the above cigarette packaging material is provided.

[0011] The purposes of the present invention are not limited to those mentioned above, and other unmentioned purposes and advantages of the present invention can be understood through the following description and will be more clearly understood through the embodiments of the present invention. Furthermore, it will be readily apparent that the purposes and advantages of the present invention can be realized by the means and combinations thereof described in the specification.

[0012] According to a first aspect of the present invention, a packaging material for cigarettes comprising polyolefin and calcium carbonate is provided.

[0013] According to the second aspect of the present invention, in the first aspect, the density of the polyolefin is 0.90 g / cm 3 More than 1.00 g / cm 3 It could be as follows:

[0014] According to a third aspect of the present invention, in the first or second aspect, the whiteness of the calcium carbonate may be 94% or more in accordance with ISO 2469.

[0015] According to a fourth aspect of the present invention, in any one of the first to third aspects, the crystal form of the calcium carbonate may be a precipitated form (Precipitated calcium carbonate, PCC) or a ground form (Ground calcium carbonate, GCC).

[0016] According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the weight ratio of the polyolefin and the calcium carbonate may be 1:9 or more and 3:7 or less.

[0017] According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the tobacco packaging material may further comprise stearic acid, and the polyolefin may comprise a recycled polyolefin.

[0018] According to the seventh aspect of the present invention, in the sixth aspect, the content of the stearic acid may be 0.1 parts by weight or more and 2 parts by weight or less with respect to 100 parts by weight of the base material composed of the recycled polyolefin and the calcium carbonate.

[0019] According to an eighth aspect of the present invention, in any one of the first to seventh aspects, the biodegradability of the cigarette packaging material may be 75% or more in accordance with the ISO 14855-1 test standard.

[0020] According to a ninth aspect of the present invention, a cigarette case is provided, comprising an inner liner and a wrapping paper on the inner liner, wherein at least one of the inner liner and the wrapping paper comprises a cigarette packaging material according to any one of the first to eighth aspects. Specifically, the inner liner and the wrapping paper may comprise the cigarette packaging material.

[0021] According to the tenth aspect of the present invention, in the ninth aspect, the packaging paper may further include paper on the cigarette packaging material.

[0022] According to the eleventh aspect of the present invention, in the tenth aspect, the basis weight of the paper is 150 g / m 2 More than 250 g / m 2 It could be as follows:

[0023] According to the twelfth aspect of the present invention, in any one of the ninth to eleventh aspects, the moisture permeability of the inner liner under the conditions of 38°C and 100%RH is 20 g / m 2 ·May be less than 24 hours. Here, the inner liner may include the above-described cigarette packaging material.

[0024] According to a thirteenth aspect of the present invention, in any one of the ninth to twelfth aspects, the packaging paper comprises: a first region including a first paper and a first mineral paper on the first paper; a second region including a second paper and a second mineral paper on the second paper; and an adhesive layer disposed between the first region and the second region, wherein the adhesive layer is disposed between the first paper and the second mineral paper, and the first mineral paper and the second mineral paper may comprise the same or different packaging materials for cigarettes.

[0025] According to a fourteenth aspect of the present invention, in the thirteenth aspect, the adhesive layer may include an ethylene-vinyl acetate copolymer and a plasticizer.

[0026] According to the 15th aspect of the present invention, in the 14th aspect, the content of the plasticizer may be 1 part by weight or more and 10 parts by weight or less with respect to 100 parts by weight of the ethylene-vinyl acetate copolymer.

[0027] The solutions to the above problems do not enumerate all features of the present invention. The various features of the present invention, along with their corresponding advantages and effects, can be understood in more detail by referring to the detailed description below.

[0028] According to one aspect of the present invention, it is possible to realize a cigarette packaging material that is environmentally friendly and harmless to the human body due to its high biodegradability.

[0029] According to another aspect of the present invention, a cigarette packaging material having properties suitable for use as an inner liner or a wrapper can be implemented.

[0030] According to another aspect of the present invention, a cigarette case including the above cigarette packaging material can be implemented.

[0031] In addition to the aforementioned effects, specific effects of the present invention are described below along with specific details for implementing the invention. Furthermore, the effects of the present invention are not limited to the effects described above and can be readily achieved using the means and combinations thereof described in the specification.

[0032] Figure 1 illustrates a cigarette case according to one embodiment of the present invention.

[0033] FIG. 2 is a manufacturing facility capable of manufacturing mineral paper included in a cigarette packaging material according to some embodiments of the present invention.

[0034] Figure 3 shows one side of the packaging paper according to one embodiment of the present invention being peeled off.

[0035] Figure 4 is a cross-sectional view taken along line AA` of Figure 3.

[0036] Figure 5 is a graph showing the change in moisture content of the inner liner according to Example 1-1 and Comparative Example 1.

[0037] Figure 6 is a graph showing the change in moisture content of the inner liner according to Example 1-1 and Comparative Example 1 over time under different relative humidity conditions.

[0038] In this specification, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0039] When multiple embodiments are described in this specification, unless otherwise specified, the embodiments may be combined with each other. The effects of the present invention may be defined to include not only the operational effects derived from each embodiment on its own, but also the effects resulting from the organic combination of the embodiments. For example, even if Embodiments 1 and 2 are described independently in this specification, unless the context clearly indicates otherwise, the effects resulting from the organic combination of Embodiments 1 and 2 may also be included in the effects of the present invention.

[0040] The term "connection" as used herein refers not only to the direct connection of certain elements, but also includes an indirect connection where another element is interposed between the elements.

[0041] The numerical range indicated by the term "to" in this specification refers to a numerical range that includes the values ​​stated before and after the term as the lower and upper limits, respectively. For example, if "a" and "b" are stated in the specification, it can be understood that "a" and "b" are stated.

[0042] In the present specification, when multiple numerical values ​​are disclosed as the upper and lower limits of any numerical range, the numerical range disclosed in the present specification can be understood as any numerical range that has any one of the multiple lower limit values ​​and any one of the multiple upper limit values ​​as the lower limit value and the upper limit value, respectively. For example, when a or more, or b or more; and c or less or d or less are described, it can be understood that a or more and c or less, a or more and d or less, b or more and c or less, or b or more and d or less are described.

[0043] In this specification, the term "layer" or film may include cases where it is formed not only over the entire area when observing the area where the layer or film exists, but also cases where it is formed over only a portion of the area. For example, the surface of the layer or film may be defined to include a flat shape, a non-flat shape, and a combination thereof; or a continuous shape, a discontinuous shape, and a combination thereof. For example, when another element is formed as a layer or film directly on top of one element, the coverage of the other element on the surface of the one element 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.

[0044] As used herein, terms such as "about" or "substantially" mean a reasonable amount of variation from the term that does not significantly alter the final result. These terms may be interpreted to include a variation of at least ±5% or at least ±10%, provided that such variation does not alter the meaning of the term and render it invalid.

[0045] In this specification, the average particle diameter of the particles is the particle diameter (D) when the cumulative percentage in the volume-based particle size distribution curve is 50% when measured by a laser diffraction particle size distribution measuring device. 50 ) can be defined as.

[0046] In this specification, "weight average molecular weight" or "number average molecular weight" refers to a standard polystyrene-converted molecular weight, which can be analyzed using a GPC (Gel permeation chromatography) device. For example, the GPC analysis method can use tetrahydrofuran (THF) as a developing solvent, and can be performed under the analysis conditions of a sample concentration of 5 mg / mL, a sample injection amount of 100 μL, a column temperature of 40°C, and a flow rate of 1 mL / min.

[0047] In this specification, “comprising at least one of a, b and c” may include a, b or c alone, or a combination of two or more selected from the group consisting of ab and c.

[0048] As used herein, "tobacco packaging" may be defined as a structure capable of packaging or enclosing tobacco. Here, "packaging" may encompass not only a function that maintains the shape or arrangement of tobacco when in contact with or connected to tobacco, but also a function that maintains the shape or arrangement of tobacco even when not in direct contact with tobacco. For example, the tobacco may include any smokeable product or any smoking article capable of providing a smoking experience, such as a cigarette, a cigar, or a cigarillo.

[0049] According to one aspect of the present invention, a packaging material for cigarettes is provided, comprising polyolefin and calcium carbonate.

[0050] In the case of a conventional paper inner liner, due to its extremely high moisture permeability, there was a problem that it excessively absorbed moisture and fragrance contained in the cigarette butt over a long period of time, so that the moisture content and fragrance retention of the cigarette butt could not be maintained. In addition, there was a problem that the deadfold performance, which is the property of maintaining the folded shape after the folding process in the cigarette butt packaging machine, was not sufficiently excellent. On the other hand, in the case of a paper-based outer packaging paper, due to the high moisture permeability of the paper, there was a problem that the outer packaging paper easily got wet with water, and due to the addition of a bleaching agent to realize whiteness, there was a problem that it had a harmful effect on the human body. According to one aspect of the present invention, by satisfying the organic combination relationship of polyolefin and calcium carbonate, it is possible to realize a cigarette packaging material that is easy to recycle, conserves forest resources, and has high biodegradability. According to another aspect of the present invention, it is possible to realize a cigarette packaging material that is harmless to the human body by excluding the use of a bleaching agent to realize the whiteness of the packaging material. According to another aspect of the present invention, by satisfying the above organic combination relationship, properties suitable for an inner liner or a packaging material can be implemented.

[0051] Below, the configuration of the present invention is described in more detail.

[0052] 1. Packaging materials for cigarettes

[0053] polyolefin

[0054] The polyolefin according to the present invention can serve as a binder that binds or connects calcium carbonates to each other.

[0055] In some embodiments of the present invention, the polyolefin may include polyethylene, and specifically has a density of 0.90 g / cm 3 More than 1.00 g / cm 3 The following polyethylene may be included. According to some embodiments of the present invention, by including the polyethylene, mechanical properties such as tensile strength suitable for an inner liner for cigarettes may be exhibited.

[0056] Specifically, the density of the polyolefin is 0.90 g / cm 3 Above, 0.91 g / cm 3 Above, 0.92 g / cm 3 Above, 0.93 g / cm 3 or 0.94 g / cm 3 above; and 0.97 g / cm 3 Below, 0.98g / cm 3 Below, 0.99g / cm 3 or less, or 1.00 g / cm 3 The following may be provided. According to some embodiments of the present invention, by controlling the density of the polyolefin within the above numerical range, chemical resistance of the tobacco packaging material can be achieved under various external conditions, and mechanical properties such as tensile strength suitable for the tobacco packaging material can be achieved. For example, the density of the polyolefin can be measured in accordance with JIS K7112.

[0057] In some embodiments of the present invention, the content of the polyethylene based on the total weight of the polyolefin may be 90 wt% or more, 91 wt% or more, 92 wt% or more, 93 wt% or more, 94 wt% or more, 95 wt% or more, 96 wt% or more, 97 wt% or more, 98 wt% or more, 99 wt% or more, or 100 wt%. According to some embodiments of the present invention, by adjusting the content of the polyethylene based on the total weight of the polyolefin to the above numerical range, the role of the binder that binds calcium carbonate to each other is better expressed, and at the same time, the processability of the polyolefin is further improved, so that the miscibility with calcium carbonate can be expressed more excellently.

[0058] In some embodiments of the present invention, the weight average molecular weight of the polyolefin may be 200,000 g / mol or more, 250,000 g / mol or more, or 260,000 g / mol or more; and 460,000 g / mol or less, 480,000 g / mol or less, or 500,000 g / mol or less. According to some embodiments of the present invention, by controlling the weight average molecular weight of the polyolefin within the above numerical range, chemical resistance to various external conditions of the tobacco packaging material can be realized, and mechanical properties such as tensile strength suitable for the tobacco packaging material can be realized.

[0059] In some further embodiments of the present invention, the polyolefin may comprise recycled polyolefin. According to some embodiments of the present invention, by using recycled polyolefin manufactured from waste polyolefin as a binder, the content of waste polyolefin can be reduced, thereby realizing an environmentally friendly cigarette packaging material.

[0060] The recycled polyolefin according to the present invention may include a polyolefin resin regenerated from waste polyolefin materials. For example, the recycled polyolefin may be manufactured by feeding waste polyolefin in pellet form into a kneader and then subjecting it to a kneading and heating process.

[0061] In some examples, the method for producing the recycled polyolefin is not particularly limited and may be a method of producing the recycled polyolefin by introducing waste polyolefin into a kneader and then mixing and heating the waste polyolefin. Specifically, the method for producing the recycled polyolefin may include the steps of: introducing waste polyolefin into a kneader; and adjusting the temperature of the kneader to 150 to 200°C, the mixing speed of the kneader to 30 to 60 RPM, and the mixing time to 5 to 20 minutes to produce the recycled polyolefin.

[0062] In some embodiments of the present invention, the recycled polyolefin may include recycled polyethylene, and specifically has a density of 0.90 to 1.00 g / cm. 3 The recycled polyolefin may include recycled polyethylene. According to some embodiments of the present invention, when the recycled polyolefin includes recycled polyethylene, the effect of decomposing the recycled polyethylene by geothermal heat when the cigarette packaging material is buried in the ground can be further promoted, and mechanical properties suitable for an inner liner or a packaging material can be exhibited.

[0063] Specifically, the density of the above-mentioned recycled polyethylene is 0.91 to 1.00 g / cm 3 , 0.92 to 0.99 g / cm 3 , 0.93 to 0.98 g / cm 3, or 0.94 to 0.97 g / cm 3 According to some embodiments of the present invention, since the density of the recycled polyethylene satisfies the above numerical range, chemical resistance of the cigarette packaging material can be realized under various external conditions, and mechanical properties such as tensile strength suitable for the outer packaging paper or inner liner can be realized. For example, the density of the recycled polyethylene can be measured in accordance with JIS K7112.

[0064] In some embodiments of the present invention, the content of the recycled polyethylene based on the total weight of the recycled polyolefin may be 90 wt% or more, 91 wt% or more, 92 wt% or more, 93 wt% or more, 94 wt% or more, 95 wt% or more, 96 wt% or more, 97 wt% or more, 98 wt% or more, 99 wt% or more, or 100 wt%. According to some embodiments of the present invention, since the content of the recycled polyethylene based on the total weight of the recycled polyolefin satisfies the numerical range, the role of the binder that binds calcium carbonate to each other is better expressed, and at the same time, the processability of the recycled polyolefin is further improved, so that the miscibility with calcium carbonate can be expressed more excellently.

[0065] In another embodiment of the present invention, the recycled polyolefin may further include, in addition to the recycled polyolefin, at least one selected from the group consisting of recycled polypropylene, non-renewable polyethylene, and non-renewable polypropylene. Here, "non-renewable polyethylene" and "non-renewable polypropylene" are not made from waste polyolefin as raw materials, and are general polyethylene or polypropylene commonly used in the relevant technical field, and may be distinguished from recycled polyethylene or recycled polypropylene. Specifically, the content of at least one selected from the group consisting of recycled polypropylene, non-renewable polyethylene, and non-renewable polypropylene may be 10 wt% or less, 9 wt% or less, 8 wt% or less, 7 wt% or less, 6 wt% or less, 5 wt% or less, 4 wt% or less, 3 wt% or less, 2 wt% or less, 1 wt% or less, or 0.5 wt% or less, based on the total weight of the recycled polyolefin. According to some embodiments of the present invention, when the content of at least one selected from the group consisting of the recycled polypropylene, non-recycled polyethylene, and non-recycled polypropylene satisfies the numerical range, the role of a binder that binds calcium carbonate to each other is better expressed, and at the same time, the processability of the recycled polyolefin is further improved, so that the miscibility with calcium carbonate can be expressed more excellently.

[0066] In some embodiments of the present invention, the weight average molecular weight of the recycled polyolefin may be 200,000 to 500,000 g / mol, 250,000 to 480,000 g / mol, or 260,000 to 460,000 g / mol. According to some embodiments of the present invention, since the weight average molecular weight of the recycled polyolefin satisfies the numerical range, chemical resistance to various external conditions of the cigarette packaging material can be realized, and mechanical properties such as tensile strength suitable for the outer packaging paper or inner liner can be realized.

[0067] calcium carbonate

[0068] The calcium carbonate according to the present invention can enhance the mechanical properties of cigarette packaging materials and be an environmentally friendly material that returns to the soil when buried in the ground. Furthermore, the calcium carbonate according to the present invention, when incorporated into cigarette packaging materials, can have the advantage of eliminating the need for bleaching agents due to its inherent whitening properties. Therefore, considering the intended use of cigarette packaging materials, which frequently come into contact with skin, such as the hands, it is possible to create cigarette packaging materials that are harmless to the human body.

[0069] In some embodiments of the present invention, the whiteness of the calcium carbonate may be 94% or more, 95% or more, 96% or more, 96 to 98%, or 96 to 97%. Specifically, when the whiteness of the calcium carbonate satisfies the numerical range, a cigarette packaging material that is harmless to the human body and has high whiteness and opacity can be realized without a bleaching agent. For example, the whiteness of the calcium carbonate can be measured using a whiteness measuring device (Elrepho 3300 instrumentation) in accordance with ISO 2469.

[0070] In some embodiments of the present invention, the crystalline form of the calcium carbonate may be a precipitated form (Precipitated calcium carbonate, PCC) or a ground form (Ground calcium carbonate, GCC), and specifically, may be a precipitated form. According to some embodiments of the present invention, when the crystalline form of the calcium carbonate is a precipitated form, it has a lower impurity content, a higher whiteness, and a controllable particle size compared to other crystalline forms, so that a cigarette packaging material having a high whiteness can be realized even without a bleaching agent. For example, the crystalline form of the calcium carbonate can be analyzed using powder XRD (X-Ray diffraction), and specifically, can be analyzed using XRD equipment (Scintag X'TRA). For example, the XRD analysis conditions may be, for X-ray, Cu-tube, for 2θ, 2 to 40°, for scan mode, continuous scan mode, and for scan speed, 0.25 to 5° / min.

[0071] For example, the crystal form of the calcium carbonate may vary depending on the method for producing the calcium carbonate. In some examples, the precipitated calcium carbonate may be synthesized through a calcination process to produce quicklime (CaO) from limestone, a hydration process to react quicklime with water to produce slaked lime (Ca(OH)2), and a carbonation process to react the slaked lime with carbon dioxide to produce precipitated calcium carbonate. In some examples, the ground calcium carbonate is calcium carbonate obtained from a natural source, such as limestone, marble, or chalk, and may be manufactured through treatments such as grinding, screening, and / or dry and / or wet subdivision, for example, by a cyclone, a classifier, or a centrifuge.

[0072] In some embodiments of the present invention, the BET (Brunauer, Emmett, Teller) specific surface area of ​​the calcium carbonate is 0.80 m 2 / g or more, 0.85 m 2 / g or more, 0.89 m 2 / g or more than 1 m 2 / g or more, 2 m 2 / g or more, 3 m 2 / g or more, 4 m 2 / g or more, 1 to 25 m 2 / g, 2 to 24 m 2 / g, 3 to 23 m 2 / g, or 4 to 22 m 2 / g. The BET specific surface area of ​​calcium carbonate is a value obtained by dividing the surface area of ​​calcium carbonate by its mass, and can affect both the moisture permeability and mechanical properties of the tobacco packaging material. According to some embodiments of the present invention, when the BET specific surface area of ​​the calcium carbonate satisfies the above numerical range, when the tobacco packaging material is applied to an inner liner, the moisture permeability can be significantly reduced, thereby maintaining the moisture content and fragrance of the cigarette filler, and when the tobacco packaging material is applied to a cigarette case wrapper, stiffness can be sufficiently implemented. For example, the BET specific surface area of ​​the calcium carbonate can be measured in accordance with ISO 9277:1995.

[0073] In some embodiments of the present invention, the average particle diameter (D) of the calcium carbonate 50 ) may be 1 ㎛ or more, 2 ㎛ or more, or 2.5 ㎛ or more; and 3 ㎛ or less, 4 ㎛ or less, 5 ㎛ or less, 6 ㎛ or less, 7 ㎛ or less, 8 ㎛ or less, 9 ㎛ or less, or 10 ㎛ or less, and specifically 1 to 10 ㎛, 2 to 9 ㎛, 2 to 8 ㎛, 2 to 7 ㎛, 2 to 6 ㎛, or 2.5 to 6 ㎛. According to some embodiments of the present invention, the average particle diameter (D of the calcium carbonate 50) satisfies the above numerical range, the dispersibility of the calcium carbonate mixed with the polyolefin resin is further improved, so that the mechanical properties and optical properties of the cigarette packaging material can be easily controlled. For example, the average particle diameter of the calcium carbonate can be calculated by dispersing the target particles in a dispersion medium, introducing them into a commercially available laser diffraction particle size measuring device (e.g., Microtrac S3500), and measuring the difference in diffraction pattern according to particle size when the particles pass through a laser beam, thereby calculating the particle size distribution.

[0074] Stearic acid

[0075] In some embodiments of the present invention, the tobacco packaging material may further comprise stearic acid. Specifically, stearic acid possesses a carboxyl group, a hydrophilic functional group, which can impart hydrophilicity to the surface of the polyolefin or the recycled polyolefin. This can facilitate the attachment of various soil microorganisms to the surface of the polyolefin.

[0076] The stearic acid according to the present invention can further enhance the biodegradability of the polyolefin or the recycled polyolefin, thereby enabling the creation of environmentally friendly tobacco packaging. Typically, if tobacco packaging does not contain stearic acid, buried tobacco packaging may experience reduced biodegradability even when exposed to geothermal heat.

[0077] Relationships between components

[0078] In some embodiments of the present invention, the weight ratio of the polyolefin and the calcium carbonate (polyolefin:calcium carbonate) may be 1:9 or more and 3:7 or less, specifically 1.5:8.5 or more and 3:7 or less, and more specifically 1.5:8.5 or more and 2:8 or less. According to some embodiments of the present invention, by adjusting the weight ratio of the polyolefin and the calcium carbonate within the above numerical range, the mechanical properties of the cigarette packaging material, such as tensile strength and stiffness, are excellently expressed, and at the same time, the effect of connecting or bonding calcium carbonate particles to each other is improved, so that detachment of the calcium carbonate particles can be effectively prevented.

[0079] In some embodiments of the present invention, the weight ratio of the recycled polyolefin and the calcium carbonate (recycled polyolefin:calcium carbonate) may be 1:9 to 3:7, specifically 1.5:8.5 to 3:7, and more specifically 1.5:8.5 to 2:8. According to some embodiments of the present invention, when the weight ratio of the recycled polyolefin and the calcium carbonate satisfies the numerical range, the mechanical properties such as tensile strength and stiffness of the cigarette packaging material are excellently expressed, and at the same time, the effect of connecting or bonding calcium carbonate particles to each other is improved, so that detachment of the calcium carbonate particles can be effectively prevented.

[0080] In some embodiments of the present invention, the content of stearic acid with respect to 100 parts by weight of the base material composed of the recycled polyolefin and the calcium carbonate may be 0.1 parts by weight or more, 0.2 parts by weight or more, 0.3 parts by weight or more, 0.4 parts by weight or more, or 0.5 parts by weight or more; and 0.6 parts by weight or less, 0.7 parts by weight or less, 0.8 parts by weight or less, 0.9 parts by weight or less, 1 part by weight or less, or 2 parts by weight or less, and specifically, 0.1 to 2 parts by weight, 0.1 to 1 part by weight, 0.1 to 0.9 parts by weight, 0.2 to 0.8 parts by weight, 0.3 to 0.7 parts by weight, 0.4 to 0.6 parts by weight, or 0.5 to 0.6 parts by weight. According to some embodiments of the present invention, when the content of the stearic acid satisfies the above numerical range, the mechanical properties of the cigarette packaging material are sufficiently expressed, and at the same time, the biodegradation of the recycled polyolefin can be further promoted.

[0081] Inner liner properties

[0082] In some embodiments of the present invention, the biodegradability of the tobacco packaging material may be 75% or greater, 76% or greater, 77% or greater, or 78% or greater, in accordance with the ISO 14855-1 test standard. For example, the biodegradability of the tobacco packaging material may be analyzed in accordance with the ISO 14855-1 test standard.

[0083] When the cigarette packaging material of some embodiments of the present invention is included in an inner liner, the thickness of the inner liner is 50 ㎛ or more, 60 ㎛ or more, 70 ㎛ or more, 80 ㎛ or more, or 90 ㎛ or more; And it may be 95 ㎛ or less, 100 ㎛ or less, 105 ㎛ or less, 110 ㎛ or less, 120 ㎛ or less, 130 ㎛ or less, 140 ㎛ or less, 150 ㎛ or less, 160 ㎛ or less, 170 ㎛ or less, 180 ㎛ or less, 190 ㎛ or less, or 200 ㎛ or less, and specifically, it may be 50 to 200 ㎛, 60 to 190 ㎛, 70 to 180 ㎛, 80 to 170 ㎛, 90 to 160 ㎛, 90 to 150 ㎛, 90 to 140 ㎛, 90 to 130 ㎛, 90 to 120 ㎛, 90 to 110 ㎛, 90 to 100 ㎛, or 90 to 95 ㎛. According to some embodiments of the present invention, when the thickness of the cigarette packaging material satisfies the above numerical range, the tensile strength of the inner liner can be implemented at an appropriate level, while simultaneously reducing the moisture permeability to an appropriate level. For example, the thickness of the inner liner can be measured in accordance with KS M ISO 534.

[0084] When the cigarette packaging material of some embodiments of the present invention is included in the inner liner, the basis weight of the cigarette packaging material is 50 g / m 2 Above, 60 g / m 2 Above, 70 g / m 2 Above, 80 g / m 2 Above, 90 g / m 2 Above, 95 g / m 2 Above, 98 g / m 2 or more than 99 g / m 2 above; and 110 g / m 2 Below 120 g / m 2 Below 130 g / m 2 Below 140 g / m 2 Below 150 g / m 2 Below 160 g / m 2 Below 170 g / m 2 Below 180 g / m 2Below 190 g / m 2 Less than or equal to 200 g / m 2 It may be less than, specifically 50 to 200 g / m 2 , 60 to 190 g / m 2, 70 to 180 g / m 2 , 80 to 170 g / m 2, 90 to 160 g / m 2 , 90 to 150 g / m 2 , 95 to 140 g / m 2 , 95 to 130 g / m 2 , 98 to 120 g / m 2 , or 99 to 110 g / m 2 According to some embodiments of the present invention, when the basis weight of the tobacco packaging material satisfies the above numerical range, the tensile strength of the tobacco packaging material can be implemented at an appropriate level, while simultaneously reducing the moisture permeability to an appropriate level. For example, the basis weight of the inner liner can be measured in accordance with KS M ISO 536.

[0085] In some examples, when the tobacco packaging material is included in the inner liner, the tensile strength of the tobacco packaging material is 3.0 kgf / 15mm or more, 5 kgf / 15mm or more, 6 kgf / 15mm or more, 7 kgf / 15mm or more, 10 kgf / 15mm or more, or 11 kgf / 15mm or more in the MD (Machine direction); And it may be 13 kgf / 15mm or less, 14 kgf / 15mm or less, 15 kgf / 15mm or less, 17 kgf / 15mm or less, 18 kgf / 15mm or less, 19 kgf / 15mm or less, or 20 kgf / 15mm or less, and specifically 3.0 to 20.0 kgf / 15mm, 5 to 19 kgf / 15mm, 6 to 18 kgf / 15mm, 7 to 17 kgf / 15mm, 10 to 15 kgf / 15mm, or 11 to 14 kgf / 15mm, or 12 to 13 kgf / 15mm. For example, the tensile strength of the cigarette packaging material may be measured in accordance with KS M ISO 1924-2.

[0086] In some examples, when the tobacco packaging material is included in the inner liner, the whiteness of the tobacco packaging material may be 80% or more, 81% or more, 82% or more, 83% or more, 84% or more, 85% or more, 86% or more, 87% or more, 88% or more, 89% or more, 80 to 95%, 81 to 94%, 82 to 93%, 83 to 92%, 84 to 92%, 85 to 92%, 86 to 92%, 87 to 92%, 88 to 92%, or 89 to 92%. Specifically, even if the tobacco packaging material does not include a bleaching agent, by implementing a whiteness within the above numerical range, a tobacco packaging material that is harmless to the human body and environmentally friendly can be implemented. For example, the whiteness of the cigarette packaging material can be measured in accordance with KS M ISO 2470. Here, the bleaching agent is not particularly limited and may be a general bleaching agent commonly used in the paper technology field, and may specifically include a chlorine-based bleaching agent, and more specifically, may include chlorine dioxide. The cigarette packaging material according to some embodiments of the present invention does not include a bleaching agent, and thus can achieve the effect of not generating chlorine gas harmful to the human body during bleaching.

[0087] In some examples, when the cigarette packaging material is included in the inner liner, the opacity of the inner liner may be 80% or more, 81% or more, 82% or more, 83% or more, 84% or more, 85% or more, 86% or more, 87% or more, 88% or more, 89% or more, 90% or more, 91% or more, 80 to 95%, 81 to 94%, 82 to 93%, 83 to 92%, 84 to 92%, 85 to 92%, 86 to 92%, 87 to 92%, 88 to 92%, 89 to 92%, 90 to 92%, or 91 to 92%. For example, the opacity of the inner liner may be measured in accordance with KS M ISO 2471. According to some embodiments of the present invention, when the opacity of the inner liner satisfies the above numerical range, the phenomenon of a printed image showing through during printing can be effectively prevented.

[0088] In some examples, when the above cigarette packaging material is included in the inner liner, the moisture permeability of the inner liner is 20 g / m under 38°C and 100%RH conditions. 2 ·24 hours or less, 19 g / m 2 ·24 hours or less, 18 g / m 2 ·24 hours or less, 17 g / m 2 ·24 hours or less, 16 g / m 2 ·24 hours or less, 15 g / m 2 ·Less than 24 hours, 14 g / m 2 ·Less than 24 hours, 13 g / m 2 ·Less than 24 hours, or 12 g / m 2 ·May be less than 24 hours, and specifically, the upper limit value (g / m) above 0 or more 2·24 hr) may be any one or less. For example, the moisture permeability of the inner liner may be measured in accordance with KS M ISO 15106-2. According to some embodiments of the present invention, when the moisture permeability of the cigarette packaging material satisfies the above numerical range, the effect of maintaining the moisture and fragrance of the cigarette filler is more excellently expressed, so that the marketability of the cigarette can be further improved.

[0089] Properties of the packaging paper

[0090] When the cigarette packaging material of some embodiments of the present invention is included in a cigarette case, the thickness of the cigarette packaging material may be 100 to 400 μm, 150 to 390 μm, 160 to 380 μm, 200 to 380 μm, or 240 to 370 μm. According to some embodiments of the present invention, when the thickness of the cigarette case is within the above numerical range, the stiffness of the cigarette case may be increased while simultaneously lowering the moisture permeability to an appropriate level. For example, the thickness of the cigarette case may be measured in accordance with KS M ISO 534.

[0091] In some embodiments of the present invention, when a cigarette packaging material is included in a cigarette packaging paper, the basis weight of the cigarette packaging material is 200 to 400 g / m 2 , 210 to 390 g / m 2 , 220 to 380 g / m 2 , 230 to 370 g / m 2, 240 to 360 g / m 2 , 250 to 350 g / m 2 , 260 to 350 g / m 2 , 270 to 350 g / m 2 , or 280 to 350 g / m 2According to some embodiments of the present invention, when the basis weight of the cigarette packaging material satisfies the above numerical range, the stiffness of the packaging paper can be implemented at an appropriate level, while the moisture permeability can be lowered to an appropriate level.

[0092] In some embodiments of the present invention, when a cigarette packaging material is included in a carton, the whiteness of the cigarette packaging material may be 80% or more, 81% or more, 82% or more, 83% or more, 84% or more, and specifically any one of the plurality of lower limit values ​​(%) and 95% or less. Specifically, even if the cigarette packaging material does not include a bleaching agent, by implementing a whiteness within the above numerical range, a cigarette packaging material that is harmless to the human body and environmentally friendly can be implemented. For example, the whiteness of the cigarette packaging material can be measured in accordance with KS M ISO 2470. Herein, the bleaching agent may be the same as or different from the bleaching agent described above.

[0093] In some embodiments of the present invention, when the tobacco packaging material is included in the cigarette case, the opacity of the tobacco packaging material may be 90% or more, 91% or more, 92% or more, 93% or more, 94% or more, or 95 to 100%. For example, the opacity of the cigarette case may be measured in accordance with KS M ISO 2471. According to some embodiments of the present invention, when the opacity of the tobacco packaging material satisfies the numerical range, the show-through phenomenon of the printed image during printing can be effectively prevented.

[0094] According to one embodiment of the present invention, a wrapper comprising a tobacco packaging material of several embodiments can be provided. In this case, the tobacco packaging material can be composed of the above-described tobacco packaging material without being laminated with paper. In some examples, the stiffness of the tobacco packaging material can be independently 10 to 30 gf / cm, 10 to 25 gf / cm, 15 to 20 gf / cm, or 17 to 19 gf / cm in the machine direction (MD) and cross direction (CD), respectively. For example, the stiffness of the tobacco packaging material can be measured in accordance with KS M ISO 2493.

[0095] According to another embodiment of the present invention, a wrapping paper comprising a substrate and paper on the substrate can be provided. In this case, the cigarette packaging material of some of the embodiments described above can be included on the substrate. Specifically, by composing the paper with the substrate, the stiffness of the wrapping paper can be increased, while at the same time, a moisture-proofing effect that is difficult to achieve with paper and a waterproof wrapping paper function that does not get wet can be realized.

[0096] According to some embodiments of the present invention, by including several mineral papers on the substrate, the smoothness of the substrate can be improved, thereby further improving the ease of printing.

[0097] In some embodiments of the present invention, the basis weight of the paper is 150 g / m 2 Above, 160 g / m 2 Above, 170 g / m 2 Above, 180 g / m 2 or 190 g / m 2 above; and 200 g / m 2 Below 210 g / m 2 Below 220 g / m 2 Below 230 g / m 2 Below 240 g / m 2 Less than or equal to 250 g / m2 It may be less than, specifically 150 to 250 g / m 2 , 160 to 240 g / m 2, 170 to 230 g / m 2, 180 to 220 g / m 2, 190 to 210 g / m 2, or 190 to 200 g / m 2 According to some embodiments of the present invention, when the basis weight of the paper satisfies the above numerical range, the stiffness of the cigarette case wrapping paper is adjusted to an appropriate level, so that the transport process can be easily performed, and the adhesive performance between the areas of one case wrapping paper can be sufficiently achieved.

[0098] In some embodiments of the present invention, the packaging paper may further include a printed layer having a pattern or design engraved on one side of the substrate. Specifically, the substrate may be interposed between the printed layer and the paper. For example, the printed layer is not particularly limited and may be manufactured using a printing method commonly used in the relevant technical field. Specifically, the printed layer may be implemented using a gravure printing or offset printing method, and more specifically, may be implemented using an offset printing method. According to some examples, when using an offset printing method compared to other printing methods, the effect of accurately applying ink to a desired location during the printing process can be implemented.

[0099] In some examples, based on a thickness of 365 μm of the above-mentioned cigarette packaging paper, the stiffness of the cigarette packaging material may be 150 to 250 gf / cm in the MD direction and 100 to 200 gf / cm in the CD (cross direction) direction. In this case, the cigarette packaging paper may be mineral paper laminated with paper. Specifically, the stiffness of the tobacco packaging material may be 160 to 240 gf / cm, 170 to 230 gf / cm, 180 to 220 gf / cm, 190 to 210 gf / cm, or 190 to 200 gf / cm in the MD direction, and may be 110 to 190 gf / cm, 120 to 180 gf / cm, 130 to 170 gf / cm, 140 to 160 gf / cm, or 140 to 150 gf / cm in the CD direction. For example, the stiffness of the tobacco packaging material may be measured in accordance with KS M ISO 2493. According to some embodiments of the present invention, since the stiffness of the tobacco packaging material satisfies the above numerical range, deformation of the packaging material from various external forces is minimized, and the packaging function of the tobacco can be excellently expressed.

[0100] In some embodiments of the present invention, when a cigarette packaging material is included in a cigarette packaging paper, the cigarette packaging material has a density of 15 g / m under conditions of 38°C and 100%RH. 2 ·Less than 24 hours, 14 g / m 2 ·Less than 24 hours, 13 g / m 2 ·Less than 24 hours, or 12 g / m 2 ·May be less than 24 hours, and specifically any one of the multiple upper limit values ​​above 0 or more (g / m 2 ·24 hours) or less. For example, the moisture permeability of the cigarette packaging material in the above-mentioned packaging paper can be measured in accordance with KS M ISO 15106-2.

[0101] 2. Cigarette case

[0102] According to another aspect of the present invention, a cigarette case is provided, comprising: an inner liner; and a wrapping paper on the inner liner, wherein at least one of the inner liner and the wrapping paper comprises a packaging material for cigarettes according to some embodiments.

[0103] Figure 1 illustrates a cigarette case according to one embodiment of the present invention.

[0104] Referring to FIG. 1, a cigarette case (100) according to the present invention is a structure that packages the entire cigarette and may include an inner liner (10) and a wrapping paper (20).

[0105] The inner liner (10) according to the present invention can perform the function of packaging multiple cigarettes and at the same time improve the durability of the moisture and tobacco flavor of each cigarette.

[0106] In some examples, the inner liner (10) may be placed on the inside of the outer packaging paper (20) corresponding to the housing of the cigarette case. At this time, the inner liner (10) may or may not be in contact with the outer packaging paper (20).

[0107] The wrapping paper (20) according to the present invention serves as the main body or housing of the cigarette case (100) and can form the exterior of the cigarette case. The wrapping paper (20) according to the present invention can be placed on the inner liner (10).

[0108] If necessary, the cigarette case (100) according to the present invention may further include a metal foil (30) to effectively prevent the release of tobacco aroma. In addition, the metal foil (30) according to the present invention may have the characteristics of maintaining gloss and not discoloring or oxidizing for a long period of time even at very high temperatures.

[0109] In some examples, the metal foil (30) may include aluminum foil. Aluminum foil is inexpensive among thin metal foils and may have superior gloss retention properties.

[0110] In some embodiments of the present invention, the inner liner (10) and the outer packaging paper (20) may include tobacco packaging materials of some embodiments. Specifically, by including all of the tobacco packaging materials of some embodiments described above in the inner liner and the outer packaging paper, a synergistic effect of moisture barrier effect and water resistance effect that were difficult to achieve with paper packaging materials can be further realized.

[0111] In this specification, “mineral paper” is defined as comprising the above-described polyolefin and the above-described calcium carbonate.

[0112] FIG. 2 is a manufacturing facility capable of manufacturing mineral paper included in a cigarette packaging material according to some embodiments of the present invention.

[0113] Referring to FIG. 2, the mineral paper manufacturing equipment (200) according to the present invention may include an extruder (110), a mold inlet (120), a cooling means (130), a tube (140), a folding means (155), a first roll (160), a cutting means (170), and a second roll (180).

[0114] In some embodiments of the present invention, the extruder (110) may be a device that mixes and melts both polyolefin and calcium carbonate to produce a melt.

[0115] In some other embodiments of the present invention, the extruder (110) may be a device that mixes and melts all of the recycled polyolefin, calcium carbonate, and stearic acid to produce a melt.

[0116] In some examples, the extruder (110) may be specifically equipped with a twin screw, without particular limitations. For example, the rotation speed of the screw may be 70 to 100 RPM, and the diameter of the screw may be 100 to 150 mm.

[0117] The mold inlet (120) according to the present invention may be a device for molding a molten material melted by the extruder (110). The molten material may be molded to correspond to the shape of the mold, and then cooled by a cooling means (130) described later to produce a preliminary sheet. Specifically, the mold inlet (120) may be connected to the extruder (110), and more specifically, may be directly connected.

[0118] The cooling means (130) according to the present invention can cool the molten material using cold air to produce a molded article. For example, the temperature of the air may be 60 to 90°C, or 70 to 80°C. Specifically, the cooling means (130) may be connected to the mold inlet (120), and more specifically, may be directly connected.

[0119] The tube (140) according to the present invention may refer to a portion or region where a preliminary sheet is manufactured. Specifically, the preliminary sheet that has passed through the tube (140) can be stretched in the longitudinal and transverse directions by a first roll (160), which will be described later, under predetermined temperature conditions for a predetermined period of time. Accordingly, the mechanical properties and thickness of the mineral paper can be controlled. Specifically, the tube (140) may be connected to the cooling means (130).

[0120] The folding means (155) according to the present invention may be a device that symmetrically folds the spare sheet. For example, the spare sheet may be folded in half by the folding means (155).

[0121] The first roll (160) according to the present invention can perform the function of pulling up the spare sheet so that the spare sheet can be stretched. Although the number of the first rolls is shown as two in FIG. 2, the number of first rolls can be varied.

[0122] The cutting means (170) according to the present invention can perform the function of cutting the folded spare sheet. For example, by cutting the folded spare sheet, the cutting means (170) can transport each cut spare sheet to a second roll (180) described later.

[0123] The second roll (180) according to the present invention may be a device that transports the cut preliminary sheet to obtain mineral paper. Specifically, the second roll (180) may be connected to the cutting means (170), and more specifically, may be directly connected.

[0124] Figure 3 illustrates one side of a wrapping paper according to one embodiment of the present invention being peeled off. For example, the one side of the wrapping paper may be a side surface of the wrapping paper.

[0125] Figure 4 is a cross-sectional view taken along line AA` of Figure 3.

[0126] Referring to FIGS. 3 and 4, a packaging paper (20) according to some embodiments of the present invention may include a first region (R1), a second region (R2), and an adhesive layer (25) disposed between the first and second regions (R1, R2).

[0127] In the present specification, the first mineral paper (21m) and the second mineral paper (22m) may each independently comprise several embodiments of a cigarette packaging material that are identical or different from each other. For example, the first mineral paper (21m) may comprise polyolefin and calcium carbonate, and the second mineral paper (22m) may comprise polyolefin and calcium carbonate. For example, at least one of the density and molecular weight of the polyolefin contained in each of the mineral papers may be identical or different from each other, and at least one of the crystal form, whiteness, BET specific surface area, and average particle diameter of the calcium carbonate may be identical or different from each other.

[0128] In some embodiments of the present invention, the first region (R1) may include a first paper (21p) and a first mineral paper (21m) disposed on the first paper (21p). Specifically, the first mineral paper (21m) may be disposed directly on the first paper (21p). For example, the upper surface of the first mineral paper (21m) may be an exposed surface of the packaging paper (20), and, if necessary, a printing layer (not shown) may be disposed on the upper surface of the first mineral paper (21m).

[0129] In some embodiments of the present invention, the first paper (21p) can be connected to the second mineral paper (22m) to be described later through an adhesive layer (25). If a general adhesive is used as an adhesive to connect the first mineral paper (21m) and the second mineral paper (22m) without the presence of the first paper (21p), there is a problem of poor adhesiveness. According to some embodiments of the present invention, by controlling the solid content of the adhesive resin included in the adhesive layer (25), a packaging paper having excellent adhesiveness of the second mineral paper (22m) to the first paper (21p) can be implemented.

[0130] In some examples, the first paper (21p) may be single-layer or multi-layer. For example, the basis weight of the first paper (21p) may be 150 to 250 g / m 2 It could be.

[0131] The second region (R2) according to the present invention may include a second paper (22p) and a second mineral paper (22p). Specifically, the second mineral paper (22m) may be placed on the second paper (22p), and more specifically, may be placed directly above the second paper (22p).

[0132] In Fig. 4, the first direction (D1) may refer to, for example, the longitudinal direction of the wrapping paper (20) or the longitudinal direction of the cigarettes contained inside the wrapping paper (20). The second direction (D2) may be a direction intersecting the first direction (D1), and specifically, may be a direction perpendicular to the first direction (D1). In some examples, the first region (R1) may overlap the second region (R2) with respect to the second direction (D2). Here, the overlap may mean that the first region (R1) and the second region (R2) include at least one overlapping region with respect to the second direction (D2). That is, if the first region (R1) is in direct contact with the second region (R2), or if there is an area that overlaps with the second direction (D2) even if the first region (R1) is not in direct contact with the second region (R2), the first region (R1) can be defined as overlapping with the second region (R2).

[0133] The adhesive layer (25) according to the present invention can be placed between the second mineral paper (22m) and the first paper (21p) to connect the first region (R1) and the second region (R2) to each other.

[0134] In some embodiments of the present invention, the adhesive layer (25) may include an adhesive resin having a solid content of 51 to 53 wt%. Specifically, when the solid content of the adhesive resin satisfies the above numerical range, the adhesive strength between the first paper (21p) and the second mineral paper (22m) may be further improved.

[0135] In some embodiments of the present invention, the adhesive resin may include an ethylene-vinyl acetate copolymer that provides adhesive strength.

[0136] In some embodiments of the present invention, the content of vinyl acetate in the ethylene-vinyl acetate copolymer may be 40 to 60 wt%, 42 to 58 wt%, 45 to 55 wt%, 48 to 53 wt%, 49 to 51 wt%, or 50 to 51 wt%. Depending on the content of vinyl acetate in the ethylene-vinyl acetate copolymer, the density and flexibility of the ethylene-vinyl acetate copolymer may vary. According to some embodiments of the present invention, when the content of vinyl acetate satisfies the numerical range, the adhesive strength connecting the first region (R1) and the second region (R2) to each other may be further improved.

[0137] In some embodiments of the present invention, the content of the ethylene-vinyl acetate copolymer based on the total weight of the adhesive layer may be 70 to 99 wt%, 71 to 99 wt%, 75 to 99 wt%, 80 to 99 wt%, or 85 to 99 wt%. According to some embodiments of the present invention, when the content of the ethylene-vinyl acetate copolymer satisfies the numerical range, the adhesive strength connecting the first region (R1) and the second region (R2) to each other may be further improved. Here, the total weight of the adhesive layer may mean the weight of the total solid content of the adhesive resin from which the solvent (e.g., water) is excluded in the adhesive resin of some embodiments.

[0138] In some examples, the weight average molecular weight (Mw) of the ethylene-vinyl acetate copolymer may be 100,000 to 900,000 g / mol, 150,000 to 800,000 g / mol, 200,000 to 700,000 g / mol, or 250,000 to 650,000 g / mol. Specifically, when the weight average molecular weight (Mw) of the ethylene-vinyl acetate copolymer satisfies the numerical range, the viscosity of the adhesive resin can be adjusted to an appropriate level, thereby facilitating the processability or coatability of the adhesive resin, and the miscibility with a plasticizer can also be adjusted to an appropriate level.

[0139] In some embodiments of the present invention, the adhesive resin may further include a plasticizer that facilitates segmental movement of the ethylene-vinyl acetate copolymer.

[0140] For example, the plasticizer is not particularly limited and may specifically include at least one of a phthalate plasticizer and a non-phthalate plasticizer, and more specifically, phthalic acid esters such as dibutyl phthalate, di-n-octyl phthalate, bis(2-ethylhexyl) phthalate, bis(2-ethylhexyl) terephthalate, di-n-decyl phthalate, and diisodecyl phthalate; adipic acid esters such as bis(2-ethylhexyl) adipate, diisodecyl adipate, and di-n-octyl adipate; sebacic acid esters such as bis(2-ethylhexyl) sebacate and di-n-butyl sebacate; azelaic acid esters such as bis(2-ethylhexyl) azelate; citric acid esters such as tributyl acetyl citrate; paraffins such as chlorinated paraffin; Glycols such as polypropylene glycol; epoxy-modified vegetable oils such as epoxidized soybean oil and epoxidized linseed oil; phosphate esters such as trioctyl phosphate and triphenyl phosphate; phosphite esters such as triphenyl phosphite; ester oligomers such as esters of adipic acid and 1,3-butylene glycol, and esters of benzoic acid and dipropylene glycol; low-molecular-weight polymers such as low-molecular-weight polybutene, low-molecular-weight polyisobutylene, and low-molecular-weight polyisoprene; acrylic oligomers such as polyn-butyl acrylate and poly2-ethylhexyl acrylate; paraffinic oils such as Diana Process Oil PW series (Idemitsu Kosan), SUNPURELW70 or P series (Nippon Sun Oil); naphthenic oils such as SUNPURE N90 and NX90, SUNTHENE series (Nippon Sun Oil); and may include at least one selected from the group consisting of aromatic oils such as JSO AROMA790 (Nippon Sun Oil Co., Ltd.), Vivatec500 (H&R Co., Ltd.).

[0141] In some embodiments of the present invention, the content of the plasticizer may be 1 part by weight or more, 2 parts by weight or more, 3 parts by weight or more, 4 parts by weight or more, 5 parts by weight or more, or 6 parts by weight or more; and 7 parts by weight or less, 8 parts by weight or less, 9 parts by weight or less, or 10 parts by weight or less, and specifically 1 to 10 parts by weight, 1 to 9 parts by weight, 2 to 8 parts by weight, 3 to 7 parts by weight, 4 to 7 parts by weight, 5 to 7 parts by weight, or 6 to 7 parts by weight, based on 100 parts by weight of the ethylene-vinyl acetate copolymer. According to some embodiments of the present invention, when the content of the plasticizer satisfies the numerical range, the segmental movement of the ethylene-vinyl acetate copolymer is easily controlled, so that the adhesive strength between the first paper (21p) and the second mineral paper (22m) is further improved, thereby improving the durability of the upper packaging paper.

[0142] In some embodiments of the present invention, the content of solids in the adhesive resin may be 50 to 55 wt%, 50 to 54 wt%, 50 to 53 wt%, 51 to 53 wt%, or 52 to 53 wt%. According to some embodiments of the present invention, when the content of solids in the adhesive resin satisfies the numerical range, the adhesive strength between the first paper (21p) and the second mineral paper (22m) is further improved, so that the durability of the upper packaging paper can be excellent.

[0143] In some examples, the pH of the adhesive resin may be 4 to 5.

[0144] In some examples, the viscosity of the adhesive resin measured using a Brookfield RVT viscometer (spin 2 / 20 rpm) at 20°C may be 590 to 610 cps, 595 to 605 cps, or 600 to 605 cps. Specifically, when the viscosity of the adhesive resin satisfies the numerical range, the processability of the adhesive resin is facilitated, and the adhesive strength between the first paper (21p) and the second mineral paper (22m) can be further improved.

[0145] Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, this is merely an example, and the scope of the present invention is not limited by the following contents.

[0146] [Manufacturing Example 1: Manufacturing of Inner Liner]

[0147] <Example 1-1: Manufacturing of inner liner including mineral paper

[0148] Steps for crushing calcium carbonate:

[0149] The specific gravity is 2.3 and the refractive index (n) D ) is 1.56, and the precipitated calcium carbonate with a whiteness of 96% is crushed to obtain an average particle size (D 50 ) was prepared as calcium carbonate powder having a size of approximately 2.5 μm.

[0150] Steps for melting the mixture of HDPE and calcium carbonate powder:

[0151] Density 0.94 to 0.97 g / cm 3 A mixture of high density polyethylene (HDPE) and the calcium carbonate powder in a weight ratio of 2:8 was fed into an extruder (110) equipped with a twin screw (diameter: 130 mm, rotation speed: 80 RPM) as shown in Fig. 2, and melted at 200°C to produce a melt.

[0152] A step of manufacturing a preliminary sheet by injecting the above melt into a mold and molding it;

[0153] After the above melt was injected into the mold inlet (120), it was cooled through 80°C cold air coming from the cooling means (130) to produce a preliminary sheet in a tube (140).

[0154] Step of manufacturing a sheet by stretching the above-mentioned preliminary sheet:

[0155] The preliminary sheet was stretched in the longitudinal and width directions at 110°C for 5 minutes by the first roll (160) shown in Fig. 2, and then symmetrically folded through a folding means (155) to produce a sheet.

[0156] Steps for manufacturing an inner liner by post-processing the above sheet:

[0157] After cutting the symmetrically folded sheet with a cutting means (170), mineral paper was manufactured by being rolled by a second roll (180), thereby finally manufacturing an inner liner having a thickness of 92 μm.

[0158] <Comparative Example 1: Preparation of commercial paper inner liner>

[0159] A paper inner liner with a thickness of 61㎛, which is commonly used in the relevant technical field (a cigarette packaging inner liner product from Kookil Paper Co., Ltd.) was prepared.

[0160] [Experimental Example 1: Evaluation of Inner Liner Properties]

[0161] The properties of each inner liner of Example 1-1 and Comparative Example 1 were measured using the evaluation method in Table 1 below, and the results are shown in Table 1 below.

[0162] Classification Evaluation Method Example 1-1 Comparative Example 1 Inner Liner - Mineral Paper Paper Thickness (㎛) KS M ISO 5349261 Basis Weight (g / m) 2)KS M ISO 5369950Tensile strength (MD direction, kgf / 15mm)KS M ISO 1924-213 kgf / 15mm5.3 kgf / 15mmWhiteness (%)KS M ISO 247091.6%82%Opacity (%)KS M ISO 247191.8%68%Moisture permeability (g / m) at 38℃ and 100%RH 2 ·24hr)KS M ISO 15106-212Measurement range exceeded

[0163] Referring to Table 1 above, Example 1-1 showed the effect of significantly lowering moisture permeability and increasing opacity, whiteness, and tensile strength by including mineral paper compared to Comparative Example 1.

[0164] [Experimental Example 2: Deadfold Performance Evaluation of Inner Liner]

[0165] Excellent deadfold performance means that the folded portion of the inner liner is not restored, so the folded state is better maintained. Specifically, in order to compare the deadfold performance of the inner liners of Example 1-1 and Comparative Example 1, an expert with more than 10 years of experience in the tobacco field was asked to evaluate the deadfold performance using the defect rate as a standard for judging the condition of a typical cigarette packaging machine process. As a result, if the deadfold performance was excellent, it was evaluated as O, if it was average, it was evaluated as △, and if it was inferior, it was evaluated as X, and the results are shown in Table 2 below.

[0166] Classification Example 1-1 Comparative Example 1 Inner Liner Mineral Paper Paper Dead Fold ○△

[0167] Referring to Table 2 above, Example 1-1 showed superior deadfold performance by including mineral paper compared to Comparative Example 1.

[0168] [Experimental Example 3: Changes in the moisture content of cigarette inner liners]

[0169] Fig. 5 is a graph showing the change in moisture content of the inner liners according to Example 1-1 and Comparative Example 1. Specifically, at 25°C and a relative humidity of 50%, tobacco containing cigarettes was inserted into the internal space defined by the cigarette inner liners according to Example 1-1 and Comparative Example 1, and the moisture content (%) of the cigarettes was measured according to the storage period (days). The difference in the moisture content of the cigarettes in Fig. 5 is the difference in the moisture content of the cigarettes contained in the inner liner of Comparative Example 1 with respect to the moisture content of the cigarettes contained in the inner liner of Example 1-1.

[0170] Referring to FIG. 5, it was confirmed that the moisture content of the cigarette contained in the internal space of the cigarette inner liner according to Example 1-1 was maintained higher than that of Comparative Example 1 even after a long period of time, and that the range of change in moisture content was lower in Example 1-1 than in Comparative Example 1.

[0171] [Experimental Example 4: Changes in Moisture Content of Cigarette Inner Liners]

[0172] Figure 6 is a graph showing the change in moisture content of inner liners according to Example 1-1 and Comparative Example 1 over time under different relative humidity conditions. Specifically, the temperature of the experimental conditions was fixed at 25°C, but the relative humidity was adjusted to 33%, 43%, 57%, 67%, 75%, and 87%, respectively, to measure the change in moisture content (mg) of each cigarette inner liner over time.

[0173] Referring to Figure 6, it was confirmed that the inner liner for cigarettes of Example 1-1 showed almost no change in moisture content even when the relative humidity changed. On the other hand, the inner liner for cigarettes of Comparative Example 1 showed a tendency for the moisture content to rapidly increase as the relative humidity increased.

[0174] Through the above experimental results, it was confirmed that the inner liner for cigarettes containing mineral paper has a lower moisture change under storage conditions with various relative humidity changes compared to the inner liner for cigarettes made of paper, and it can be inferred that it can effectively prevent moisture change in cigarette paper.

[0175] [Manufacturing Preparation Example 1: Manufacturing of Recycled High-Density Polyethylene]

[0176] After feeding waste high-density polyethylene in pellet form into a Bambury mixer (Brabender HAAKE RHEOMIX 600P), the temperature of the mixer was adjusted to 170°C, the mixing speed to 40 RPM, and the mixing time to 10 minutes to produce recycled high-density polyethylene.

[0177] [Example 1-2: Manufacturing of an inner liner containing recycled polyolefin]

[0178] Density 0.94 to 0.97 g / cm 3 An inner liner was manufactured in the same manner as in Example 1-1, except that 100 parts by weight of the base material, in which the high density polyethylene (HDPE) and calcium carbonate powder of the above-mentioned manufacturing preparation example 1 were mixed in a weight ratio of 2:8, and 0.5 parts by weight of stearic acid were introduced into an extruder (110) equipped with a twin screw (diameter: 130 mm, rotation speed: 80 RPM) of FIG. 2, and then melted at 200°C to manufacture a melt.

[0179] [Experimental Example 5: Biodegradability Evaluation of Inner Liner]

[0180] The biodegradability of the inner liners manufactured by the methods according to the above Examples 1-2 and Comparative Example 1 is measured in accordance with the ISO 14855-1 test standard. Specifically, the biodegradability of mineral paper and paper is measured by measuring the content of carbon dioxide (CO2) generated under composting conditions for each inner liner manufactured by the methods according to the above Examples 1-2 and Comparative Example 1, and the results are shown in Table 3 below.

[0181] Classification Example 1-2 Comparative Example 1 Inner Liner Mineral Paper Paper Biodegradability (%) 85% 75%

[0182] Referring to Table 3 above, it can be inferred that the inner liner of Example 1-2 has a higher biodegradability than the paper inner liner of Comparative Example 1 made of pulp fibers, as it includes stearic acid, which promotes biodegradation of recycled polyolefin. When the inner liner of Example 1-2 is buried in the ground, the biodegradability of the recycled polyolefin increases due to the action of geothermal heat and stearic acid, and the calcium carbonate returns to the soil, enabling the implementation of an inner liner made of an environmentally friendly material.

[0183] [Manufacturing Preparation Example 2: Manufacturing of Adhesive Resin]

[0184] An adhesive resin having a composition according to Table 4 below was prepared. The remainder, excluding the solid content, was composed of water, and the contents of the plasticizer and filler in Table 4 below were expressed in parts by weight based on 100 parts by weight of the ethylene-vinyl acetate copolymer.

[0185] Viscosity of adhesive resin

[0186] In Table 4 below, the viscosity of the adhesive resin was measured at 20°C using a Brookfield RVT viscometer (spin 2 / 20 rpm).

[0187] Solids content

[0188] In Table 4 below, the solid content of the adhesive resin was analyzed in accordance with KS M3705.

[0189] Example 1 of comparison preparation Example 2 of comparison preparation Example of implementation Viscosity (cps) 570 15,000 600 Solid content (weight%) 50.45 452 EVA 1) 100 parts by weight100 parts by weight100 parts by weightAdditive 2) -10 parts by weight 7 parts by weight filler 3) -10 parts by weight-1) EVA: Ethylene-vinyl acetate copolymer with a vinyl acetate content of about 50 wt%2) Plasticizer: DBP (debutyl phthalate)3) Filler: Calcium carbonate

[0190] [Manufacturing Example 2: Manufacturing of Gap Packaging Paper]

[0191] <Example 2-1: Manufacturing of a packaging paper containing mineral paper>

[0192] Steps for crushing calcium carbonate:

[0193] The specific gravity is 2.3 and the refractive index (n) D ) is 1.56, and the precipitated calcium carbonate with a whiteness of 96% is crushed to obtain an average particle size (D 50 ) was prepared as calcium carbonate powder having a size of about 6 μm.

[0194] Steps for melting the mixture of HDPE and calcium carbonate powder:

[0195] Density 0.94 to 0.97 g / cm 3 A mixture of high density polyethylene (HDPE) and the calcium carbonate powder in a weight ratio of 1.5:8.5 was fed into an extruder (110) equipped with a twin screw (diameter: 130 mm, rotation speed: 80 RPM) as shown in Fig. 2, and then melted at 200°C to produce a melt.

[0196] A step of manufacturing a preliminary sheet by injecting the above melt into a mold and molding it;

[0197] After the above melt was injected into the mold inlet (120), a preliminary sheet was manufactured by cooling it through cold air of 70°C coming from a cooling means (130).

[0198] Step of manufacturing a sheet by stretching the above-mentioned preliminary sheet:

[0199] The preliminary sheet was stretched in the longitudinal and transverse directions at 100°C for 2 minutes by the first roll (160) and the pipe tube (150) shown in Fig. 2, and then folded through a folding means (155) to produce a folded sheet.

[0200] Steps for manufacturing a wrapping paper by post-processing the above sheet:

[0201] After cutting the above folded sheet with a cutting means (170), mineral paper was manufactured by being rolled by a second roll (180), thereby manufacturing a final packaging paper having a thickness of 250 ㎛.

[0202] <Example 3: Manufacturing of a packaging paper comprising mineral paper laminated with paper>

[0203] Mineral paper having a thickness of 100 μm was manufactured by the method according to the above Example 2-1. The adhesive resin according to the above Preparation Example was applied to one side of the mineral paper, and then dried at 110°C for 3 minutes. The packaging paper of Example 3 was manufactured by laminating one side of the mineral paper to which the adhesive resin was applied and the paper. At this time, the basis weight of the paper was 190 g / m. 2 And the thickness of the above paper is 265 ㎛.

[0204] <Comparative Example 2: Preparation of commercial paper packaging paper>

[0205] A paper packaging paper with a thickness of 280㎛ that is commonly used in the relevant technical field (Ivory paperboard product for cigarette packaging from Hanchang Paper Co., Ltd.) was prepared.

[0206] [Experimental Example 6: Properties of the Gap Packaging Paper]

[0207] The physical properties of the packaging paper according to the above Examples 2-1, 3 and Comparative Example 2 were measured using the evaluation method below, and the results are shown in Table 5 below.

[0208] Classification Test Standards Example 2-1 Example 3 Comparative Example 2 Packaging Paper - Mineral Paper and Composite Mineral Paper Paper Thickness (㎛) KS M ISO 534250365280 Basis Weight (g / m) 2 )KS M ISO 536346296220Whiteness(%)KS M ISO 247084.48985Opacity(%)KS M ISO 247195.699-Stiffness(gf / cm)KS M ISO 2493MD: 17.51CD: 17.51MD: 195CD: 145MD: 58CD: 2938℃ and 100% RHMoisture permeability(g / m 2 ·24hr)KS M ISO 15106-211121,000 or higher

[0209] Referring to Table 5 above, Examples 2-1 and 3 showed the effect of significantly reducing moisture permeability at 38°C and 100% RH by including mineral paper compared to Comparative Example 2.

[0210] In addition, when comparing Examples 2-1 and 3 from the viewpoint of physical properties according to the composition of the packaging paper, the stiffness was significantly increased due to the structure in which mineral paper and paper were laminated, and the opacity and whiteness were also increased.

[0211] [Example 2-2: Production of packaging paper containing recycled polyolefin]

[0212] Density 0.94 to 0.97 g / cm 3 A packaging paper was manufactured in the same manner as in Example 2-1, except that 100 parts by weight of the base material, in which the high density polyethylene (HDPE) and calcium carbonate powder of the above-mentioned manufacturing preparation example 1 were mixed in a weight ratio of 1.5:8.5, and 0.5 parts by weight of stearic acid were fed into an extruder (110) equipped with a twin screw (diameter: 130 mm, rotation speed: 80 RPM) as shown in FIG. 2, and then melted at 200°C to manufacture a melt.

[0213] [Experimental Example 7: Evaluation of Biodegradability of Gap Packaging Paper]

[0214] The biodegradability of the packaging paper according to the above Example 2-2 and Comparative Example 2 is measured in accordance with the ISO 14855-1 test standard. Specifically, the biodegradability is measured by measuring the content of carbon dioxide (CO2) generated under composting conditions for each of the packaging papers according to the above Example 2-2 and Comparative Example 2, and the results are shown in Table 6 below.

[0215] Classification Example 2-2 Comparative Example 2 Packaging Paper Mineral Paper Paper Biodegradability (%) 78% 58%

[0216] Referring to Table 6 above, Example 2-2 showed an effect of increasing biodegradability by including mineral paper compared to Comparative Example 2.

[0217] [Manufacturing Example 3: Manufacturing of packaging paper with different types of adhesive resin]

[0218] <Examples 4 and 5: Wrapping paper with a different type of adhesive resin than Example 3>

[0219] A cover sheet was manufactured in the same manner as Example 3, but instead of the adhesive resin of the above Preparation Example, the adhesive resin of Comparative Preparation Example 1 (Example 4) and Comparative Preparation Example 2 (Example 5) were used to manufacture cover sheets according to Examples 4 and 5, respectively.

[0220] [Experimental Example 8: Evaluation of Adhesive Performance between MP Surface and Paper Surface]

[0221] The adhesive strength between one side of the mineral paper and one side of the paper laminated with the mineral paper in the packaging paper according to Examples 3 to 5 was evaluated based on the following criteria.

[0222] Adhesion evaluation criteria:

[0223] In the packaging paper according to Examples 3 to 5, an adhesive resin was applied to one side of the mineral paper, the papers were laminated, and then cured for 24 hours. Thereafter, when the mineral paper and the paper were separated from each other, if the paper side was completely destroyed, it was evaluated as O, if the paper side was partially destroyed, it was evaluated as △, and if a simple peeling phenomenon occurred, it was evaluated as X, and the results are shown in Table 7 below. A higher degree of destruction of the paper side may mean better adhesive performance.

[0224] Classification Example 3 Example 4 Example 5 Adhesive resin Preparation Preliminary Comparison Preparation Example 1 Comparison Preparation Example 2 Solid content (weight%) 5250.454 Adhesive performance (MP side and paper side) O△X

[0225] Referring to Table 7 above, it was confirmed that when the solid content in the adhesive resin of Example 3 was 51 to 53 wt%, the adhesive strength between one side of the mineral paper and the paper side was further increased.

[0226] Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims also fall within the scope of the present invention.

[0227] [Explanation of symbols]

[0228] 10: Inner liner 20: Wrapping paper

[0229] 21m: 1st mineral paper 21p: 1st paper

[0230] 22m: Second mineral paper 22p: Second paper

[0231] 25: Adhesive layer 30: Metal foil

[0232] 100: Cigarette case 110: Extruder

[0233] 120: Mold inlet 130: Cooling means

[0234] 140: Tube 155: Folding means

[0235] 160: 1st roll 170: Cutting means

[0236] 180: Second roll 200: Mineral paper manufacturing equipment

[0237] R1: Area 1 R2: Area 2

Claims

1. Polyolefin; and Containing calcium carbonate, Packaging for cigarettes.

2. In paragraph 1, The density of the above polyolefin is 0.90 g / cm 3 More than 1.00 g / cm 3 Lee Ha-in, Packaging for cigarettes.

3. In paragraph 1, According to ISO 2469, the whiteness of the calcium carbonate is 94% or more. Packaging for cigarettes.

4. In paragraph 1, The crystal form of the above calcium carbonate is precipitated calcium carbonate (PCC) or ground calcium carbonate (GCC). Packaging for cigarettes.

5. In paragraph 1, The weight ratio of the above polyolefin and the above calcium carbonate is 1:9 or more and 3:7 or less, Packaging for cigarettes.

6. In paragraph 1, further comprising stearic acid; The above polyolefin includes a recycled polyolefin, Packaging for cigarettes.

7. In paragraph 6, The content of the stearic acid is 0.1 parts by weight or more and 2 parts by weight or less for 100 parts by weight of the base material composed of the above-mentioned recycled polyolefin and the above-mentioned calcium carbonate. Packaging for cigarettes.

8. In paragraph 6, The biodegradability of the above cigarette packaging material is 75% or more in accordance with the ISO 14855-1 test standard. Packaging for cigarettes.

9. Inner liner; and Including a wrapping paper on the inner liner; At least one of the inner liner and the outer packaging material comprises a cigarette packaging material according to claim 1. Cigarette case.

10. In paragraph 9, The above packaging material is, Further comprising paper on the above cigarette packaging material, Cigarette case.

11. In paragraph 10, The basis weight of the above paper is 150 g / m 2 More than 250 g / m 2 Lee Ha-in, Cigarette case.

12. In paragraph 9, According to the KS M ISO 15106-2 test standard, the moisture permeability of the inner liner is 20 g / m under the conditions of 38℃ and 100%RH. 2 ·Less than 24 hours, Cigarette case.

13. In paragraph 9, The above packaging material is: A first region comprising a first paper and a first mineral paper on the first paper A second region comprising a second paper and a second mineral paper on the second paper, and Including an adhesive layer disposed between the first region and the second region, The above adhesive layer is, Placed between the first paper and the second mineral paper, The first mineral paper and the second mineral paper comprise the same or different packaging materials for cigarettes, Cigarette case.

14. In paragraph 13, The above adhesive layer comprises an ethylene-vinyl acetate copolymer and a plasticizer. Cigarette case.

15. In paragraph 14, The content of the above plasticizer is 1 part by weight or more and 10 parts by weight or less based on 100 parts by weight of the ethylene-vinyl acetate copolymer. Cigarette case.

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