Packaging materials and packaging for tobacco products

Abstract

A sheet-like packaging material for packaging tobacco products, said packaging material comprising at least a paper layer including a flavoring component, and a barrier layer having barrier properties against the flavoring component, wherein the barrier layer is a non-metal layer.

Description

Technical Field

[0001] The present invention relates to a packaging material for tobacco products and a package for tobacco products.

Background Art

[0002] There are various packaging materials for packaging tobacco products. Typically, hard packages, soft packages, etc. are known in which a bundle of a predetermined number (for example, about 20) of tobacco articles are individually packaged together.

[0003] For example, as one form of a hard package, a hinge lid package having a lid portion that is openably and closably connected to an outer box via a hinge is widely known. The tobacco product housed in the outer box is generally housed in the outer box by an inner pack formed by folding a flexible sheet material. In addition, a soft package is typically formed by wrapping a tobacco product with an inner pack formed by folding an inner wrapper paper and wrapping this inner pack with a flexible outer wrapper paper.

[0004] Furthermore, in recent years, for the purpose of imparting an aroma other than the original flavor and taste of tobacco to a tobacco product and further enhancing the original flavor and taste of tobacco, the use of a packaging material containing a flavoring component on the inner surface when assembled has been increasing. Generally, in such a packaging material containing a flavoring component, a layer of a metal foil such as an aluminum foil is provided on the opposite side of the surface containing the flavoring component to prevent the flavoring component from bleeding out from the inner surface to the outer surface. For example, Patent Document 1 discloses a packaging material formed of a metal foil or metallized paper having a region flavored with a fragrance, and Patent Document 2 discloses a packaging material produced by laminating a paper layer containing menthol as a fragrance and a metal foil.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Japanese Patent Publication No. 2010-241504 [Patent Document 2] International Publication No. 2005 / 007512 [Overview of the project] [Problems that the invention aims to solve]

[0006] As mentioned above, conventional packaging materials for tobacco products containing flavoring components have used metal foil, such as aluminum foil, in the outer layer of the packaging to prevent the flavoring components from seeping out. While metal foil is excellent at providing a barrier to prevent such seepage, its high manufacturing cost makes it undesirable in today's environment where sustainable products are in demand. Furthermore, simply removing the metal foil would not only solve the seepage problem but also lead to a deterioration in appearance caused by the seepage. To solve these problems, there was still room for improvement in packaging material development from the perspective of improving the structure. Therefore, the present invention aims to provide, as a first objective, a tobacco product packaging material that can suppress the leakage of flavoring components embedded in the paper layer to the outside, and a tobacco product package formed by said tobacco product packaging material, and as a second objective, a tobacco product packaging material that can suppress deterioration of appearance, and a tobacco product package formed by said tobacco product packaging material. [Means for solving the problem]

[0007] As a result of diligent research, the inventors of the present invention discovered that the above problems can be solved by providing a configuration that includes at least a paper layer containing a fragrance component and a barrier layer having barrier properties against the fragrance component, and thus conceived the present invention.

[0008] [1] A sheet-like packaging material for packaging tobacco products, A paper layer containing fragrance components, The system comprises at least a barrier layer having barrier properties against the aforementioned fragrance components, The barrier layer is a nonmetallic layer. Packaging materials for tobacco products. [2] The tobacco product packaging material according to [1], further comprising an opacity layer on the side opposite to the side where the paper layer is located with respect to the barrier layer. [3] The tobacco product packaging material according to [2], wherein the concealing layer is a layer containing a concealing agent. [4] The tobacco product packaging material according to [2] or [3], wherein the concealing layer includes a paper layer. [5] A tobacco product packaging material according to any one of [1] to [4], further comprising a coating layer as the outermost layer on the side opposite to the side where the paper layer is located when viewed from the barrier layer. [6] The tobacco product packaging material according to any one of [1] to [5], wherein the fragrance component comprises menthol. [7] A tobacco product packaging material according to any of [1] to [6], wherein the barrier layer satisfies the following (condition 1). (Condition 1) The following operations (1) to (4) using the barrier layer are performed five times, and no ethanol penetration is visually confirmed in any of the five test pieces obtained. (1) Prepare a test specimen on which the barrier layer is provided on the substrate. (2) Place the test piece on a flat surface with the barrier layer side facing upwards. (3) Using a dropper, drop three drops of ethanol (purity 99.5% or higher) onto the barrier layer from a height of 25 mm. (4) After 10 minutes, wipe off the ethanol adhering to the barrier layer with a tissue. [8] Tobacco product packaging materials described in any of [1] to [7] that meet the following (condition 2). (Condition 2) If the third layer is not provided on the side of the barrier layer opposite to the side on which the paper layer is provided, then (Condition 2-1) below is satisfied, and if the third layer is provided on the side of the barrier layer opposite to the side on which the paper layer is provided, then (Condition 2-2) below is satisfied. (Condition 2-1) A substrate is laminated on the surface of the barrier layer on the side opposite to the surface on which the paper layer is provided. A fragrance is applied to the paper layer so that the basis weight is 10 gsm, and no penetration of the fragrance into the substrate is visually observed after holding for 14 days. (Condition 2-2) Using a packaging material for tobacco products, a fragrance is applied to the paper layer so that the basis weight is 10 gsm, and no penetration of the fragrance into the substrate is visually observed after holding for 14 days. [9] A packaging material for tobacco products according to any one of [1] to [8], not including a metal layer

[10] A package formed by a packaging material for tobacco products, wherein the packaging material for tobacco products is a packaging material for tobacco products described in any one of [1] to [9], and a tobacco product is housed in an internal housing portion with the paper layer side facing inward by the packaging material for tobacco products formed A tobacco product package.

Effect of the Invention

[0009] According to the present invention, it is possible to provide a packaging material for tobacco products that can suppress the bleeding of the flavoring component contained in the paper layer to the outside and the deterioration of the appearance, and a tobacco product package formed by the packaging material for tobacco products.

Brief Description of the Drawings

[0010] [Figure 1] It is a figure which shows the layer structure of the packaging material for tobacco products which concerns on embodiment of this invention. [Figure 2] It is a figure which shows an example of the visual observation result of the penetration of ethanol in the barrier property test of a barrier layer (substitute photograph of drawing). [Figure 3] It is a figure which shows the layer structure of the packaging material for tobacco products which concerns on embodiment of this invention. [Figure 4] It is a figure which shows the layer structure of the packaging material for tobacco products which concerns on embodiment of this invention. [Figure 5] It is an external perspective view of the tobacco product package which concerns on Embodiment 1. ​ [Figure 6] It is a plan view showing a sheet-like tobacco product packaging material for forming a package according to Embodiment 1. [Figure 7] It is a diagram showing the layer structure of the tobacco product packaging material for forming a package according to Embodiment 1. [Figure 8] It is a diagram schematically showing the cross-sectional structure of the outer cover in the package according to Embodiment 1 [Figure 9] It is an external perspective view of the package according to Embodiment 2. [Figure 10] It is a plan view of the tobacco product packaging material for forming a package according to Embodiment 2. [Figure 11] It is a diagram for explaining the folding procedure of the tobacco product packaging material when assembling the package according to Embodiment 2. [Figure 12] It is a diagram for explaining the folding procedure of the tobacco product packaging material when assembling the package according to Embodiment 2. [Figure 13] It is a diagram for explaining the folding procedure of the tobacco product packaging material when assembling the package according to Embodiment 2. [Figure 14] It is a diagram for explaining the folding procedure of the tobacco product packaging material when assembling the package according to Embodiment 2. [Figure 15] In the package according to Embodiment 2, it is a diagram schematically showing the cross-sectional structure of the overlapping portion of the tobacco product packaging material.

Modes for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described in detail. However, these descriptions are examples (representative examples) of the embodiments of the present invention, and the present invention is not limited to these contents unless it exceeds the gist thereof. In this specification, a numerical range represented by "~" means a range including the numerical values described before and after "~" as the lower limit value and the upper limit value, and "A~B" means A or more and B or less. Also, in this specification, although a plurality of embodiments are described, various conditions in each embodiment can be applied to each other within the applicable range. Furthermore, embodiments of the tobacco product packaging and packaging according to the present invention will be described with reference to the drawings. Note that the dimensions, materials, shapes, and relative arrangements of the components described in this embodiment are examples only.

[0012] <Composition of tobacco product packaging materials> A tobacco product packaging material according to one embodiment of the present invention (hereinafter also simply referred to as "tobacco product packaging material" or "packaging material") is a sheet-like packaging material for packaging tobacco products, A paper layer containing fragrance components, The system comprises at least a barrier layer having barrier properties against the aforementioned fragrance components, The barrier layer is a nonmetallic layer. This is packaging material for tobacco products. Figure 1 shows an example of a tobacco product packaging material according to the embodiment. The tobacco product packaging material will be described below with reference to Figure 1. In this specification, each figure showing the layer structure of the packaging material schematically shows each layer that constitutes the layer structure of the packaging material.

[0013] The tobacco product packaging material 200 shown in Figure 1 is composed of a two-layer structure comprising a paper layer 201 containing a flavoring component and a barrier layer 202 having barrier properties against the flavoring component.

[0014] The fragrance materials contained in the paper layer can cause deterioration of the appearance due to leaching. In particular, when the fragrance materials contain crystalline substances such as menthol, if stored in a low-temperature environment such as winter, the crystalline substances such as menthol that have leached to the surface will crystallize, and the crystallized substances will be visible to the user, causing deterioration of the appearance that looks like dirt. In this embodiment, the tobacco packaging material 200 is provided with a barrier layer 202 that has barrier properties against flavoring components, so that the flavoring components contained in the paper layer 201 do not permeate through the barrier layer 202, and the problem of leakage does not occur in the packaging material.

[0015] The shape of the tobacco product packaging material 200 is not particularly limited as long as it is in sheet form. Its shape in the planar direction may be polygonal, circular, elliptical, or a shape intended for package assembly (for example, the shape shown in Figure 6, which will be described later in the section on tobacco product packaging). However, from the viewpoint of ease of manufacturing and ease of package assembly, a polygonal shape is preferred, and a quadrilateral shape is more preferred. The basis weight of the tobacco product packaging material 200 is not particularly limited, but from the viewpoint of machine suitability, it is preferably 30 gsm or more, more preferably 40 gsm or more, preferably 200 gsm or less, more preferably 150 gsm or less, and even more preferably 100 gsm or less. Unless otherwise specified, the basis weight in this specification is calculated based on the dry weight of the substance in question. In particular, the basis weight of a substance formed by a process such as liquid coating is calculated based on the dry weight after solidification by a process such as solvent removal, and the basis weight of a substance formed by a process such as melting is calculated based on the dry weight after solidification by a process such as cooling solidification. The area of ​​the tobacco product packaging material 200 is not particularly limited and can be set appropriately according to the tobacco product to be contained, for example, 20 cm². 2 It may be greater than or equal to 45cm 2 It may be greater than or equal to 80cm 2 It may be greater than or equal to 125cm 2 It may be greater than or equal to 1000cm. 2 It may also be less than 500cm 2 It may also be less than 20cm. 2 It may be less than 1000cm 2 It's perfectly fine.

[0016] [Paper layer] The form of the paper layer 201 is not particularly limited, and known paper can be used, for example, Western paper can be used, and specifically, printing paper, packaging paper, or tissue paper can be used. Furthermore, from the viewpoint of simplifying the manufacturing process by promoting the bending of the packaging material 200 when folding the packaging material 200 around the tobacco product, and from the viewpoint of providing a more environmentally friendly package because the paper layer 201 can be more easily decomposed, the content of fibrous cellulose material is usually 30% by weight or more, preferably 50% by weight or more, and more preferably 70% by weight or more. There is no need to set an upper limit, and it may be 100% by weight or 100% by weight or less.

[0017] The basis weight of the paper layer 201 is not particularly limited, but from the viewpoint of machine suitability, it is preferably 25 gsm or more, preferably 30 gsm or more, more preferably 40 gsm or more, and preferably 120 gsm or less, preferably 100 gsm or less, and more preferably 90 gsm or less. Generally, in the field of paper technology, basis weight is used as a parameter instead of thickness.

[0018] The types of fragrance components included in the paper layer are not particularly limited and known fragrance components can be used, for example, menthol, tobacco leaf extract, natural plant fragrances (for example, cinnamon, sage, herbs, chamomile, kudzu, sweet tea, clove, lavender, cardamom, clove, nutmeg, bergamot, geranium, honey essence, rose oil, lemon, orange, cinnamon, caraway, jasmine, ginger, coriander, vanilla extract, spearmint, peppermint, cassia, coffee, celery, cascarilla, sandalwood, cocoa, ylang-ylang, fennel, anise, licorice, St. John's bread, plum extract, peach extract, etc.), sugars (for example, Examples include glucose, fructose, isomerized sugar, caramel, honey, molasses, etc.), cocoa (powder, extract, etc.), esters (e.g., isoamyl acetate, linalyl acetate, isoamyl propionate, linalyl butyrate, etc.), ketones (e.g., menthone, ionone, damascenone, ethyl maltol, etc.), alcohols (e.g., geraniol, linalool, anethole, eugenol, etc.), aldehydes (e.g., vanillin, benzaldehyde, anisaldehyde, etc.), lactones (e.g., γ-undecalactone, γ-nonalactone, etc.), animal-derived fragrances (e.g., musk, ambergris, civet, castoreum, etc.), and hydrocarbons (e.g., limonene, pinene, etc.). These substances may be used individually or in combination of two or more types and ratios. Among these, menthol is preferred. When the flavoring material contains crystalline substances such as menthol, the problem of deterioration in appearance due to crystallization described above is likely to occur, so the benefits obtained by adopting the configuration of this embodiment are significant.

[0019] While there are no particular restrictions on the amount of flavoring components contained in the paper layer, it is usually between 2 gsm and 20 gsm, from the viewpoint of providing a sufficient amount of flavoring components to tobacco products.

[0020] [Barrier layer] The barrier layer 202 has barrier properties against the above-mentioned fragrance components and is not particularly limited as long as it is a non-metallic layer. Here, a non-metallic layer is not a layer made solely of metal, such as aluminum foil, but a layer containing at least a non-metallic material. The material (main constituent material) of the barrier layer 202 is not particularly limited as long as it is nonmetallic, and may be, for example, a resin, specifically nitrocellulose, methylcellulose, ethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxyethylmethylcellulose, starch, fully saponified polyvinyl alcohol, partially saponified polyvinyl alcohol, ethylene copolymerized polyvinyl alcohol, polyvinylpyrrolidone, alkyd resin, polyamide resin, polyester resin, or various copolymers such as styrene-butadiene. body Examples of resins that are preferable to use in aqueous dispersion emulsions of polyolefins, particularly in the extrusion method, include low-density polyethylene, high-density polyethylene, or polypropylene. These may be used individually or mixed in any ratio and combination of two or more types. The barrier layer 202 may be composed of two or more layers made of different types of materials.

[0021] The content of the above-mentioned main constituent materials in the barrier layer 202 is not particularly limited, but from the viewpoint of sufficiently suppressing the penetration of fragrance components, it is usually 50% by weight or more, preferably 60% by weight or more, more preferably 70% by weight or more, and even more preferably 80% by weight or more. Furthermore, there is no particular upper limit that needs to be set, and it may be 100% by weight or less, or 90% by weight or less.

[0022] The method for producing the barrier layer 202 is not particularly limited, and it can be produced, for example, by a coating method or an extrusion method. When producing the barrier layer 202 by these methods, the barrier layer 202 may be produced alone and then laminated onto other layers (for example, the paper layer 201 and / or the opacity layer 203), or it may be produced simultaneously with the production of the barrier layer 202 and laminated onto other layers. The form of the coating method or extrusion method is not particularly limited, and known methods can be used as appropriate.

[0023] The thickness of the barrier layer 202 is not particularly limited, but from the viewpoint of adequately barrierping the fragrance components, it is usually 0.2 μm or more, preferably 0.7 μm or more, and more preferably 2 μm or more. From the viewpoint of ease of manufacturing, it is usually 60 μm or less, preferably 45 μm or less, and more preferably 20 μm or less. In particular, when the barrier layer 202 is manufactured by a coating method, the thickness of the barrier layer 202 is usually 0.2 μm or more, preferably 0.3 μm or more, and more preferably 0.7 μm or more, from the viewpoint of being able to sufficiently barrier the fragrance components and from the viewpoint of making it difficult to completely cover with the coating liquid when manufactured by coating. Furthermore, from the viewpoint of reducing the drying load during coating, it is usually 25 μm or less, preferably 19 μm or less, and more preferably 13 μm or less. Furthermore, when the barrier layer 202 is manufactured by extrusion, the thickness of the barrier layer 202 is usually 15 μm or more, from the viewpoint of being able to sufficiently barrier the fragrance components and from the viewpoint of being difficult to completely cover when manufactured by extrusion, and from the viewpoint of ease of manufacture, it is usually 60 μm or less, preferably 45 μm or less, and more preferably 20 μm or less.

[0024] The basis weight of the barrier layer 202 is not particularly limited, but from the viewpoint of adequately barrierping the fragrance components, it is usually 0.3 gsm or more, preferably 1 gsm or more, more preferably 3 gsm or more, even more preferably 10 gsm or more, and particularly preferably 13 gsm or more. Furthermore, from the viewpoint of ease of manufacture, it is usually 56 gsm or less, preferably 42 gsm or less, and more preferably 20 gsm or less. In particular, when the barrier layer 202 is manufactured by a coating method, the basis weight of the barrier layer 202 is not particularly limited, but from the viewpoint of being able to sufficiently barrier the fragrance components and from the viewpoint of making it difficult to completely cover with the coating liquid when manufactured by coating, it is preferable that it be 0.3 gsm or more, more preferably 0.5 gsm or more, even more preferably 1 gsm or more, particularly preferably 2 gsm or more, and especially preferably 3 gsm or more. Furthermore, from the viewpoint of reducing the drying load during coating, it is usually 20 gsm or less, preferably 15 gsm or less, and more preferably 10 gsm or less. Furthermore, when the barrier layer 202 is manufactured by extrusion, the basis weight of the barrier layer 202 is usually 13 gsm or more, from the viewpoint of being able to sufficiently barrier the fragrance components and from the viewpoint of being difficult to completely cover when manufactured by extrusion, and from the viewpoint of ease of manufacture, it is usually 56 gsm or less, preferably 42 gsm or less, and more preferably 19 gsm or less.

[0025] When the barrier layer 202 is manufactured by coating, the coating method is not particularly limited and can be carried out using known coating equipment and coating systems. For example, coating equipment can include blade coaters, bar coaters, roll coaters, air knife coaters, reverse roll coaters, curtain coaters, spray coaters, size press coaters, or gate roll coaters. Coating systems can include water-based coating using solvents such as water, or solvent-based coating using solvents such as organic solvents. As for methods for drying the barrier layer 202, conventional methods such as steam heaters, gas heaters, infrared heaters, electric heaters, hot air heaters, microwaves, or cylinder dryers can be used.

[0026] The barrier layer 202 may contain components other than the main constituent materials described above, such as fillers or pigments.

[0027] The manufacturing conditions for the barrier layer 202 when produced by extrusion are not particularly limited, but it can be produced by melting the material, such as a resin, at a temperature appropriate to the material, coating the surface of the paper layer with the molten material, and then cooling it. Alternatively, instead of directly coating the surface of the paper layer with the molten material, the barrier layer may be produced by coating another component with the molten material, peeling it off, and then bonding this to the paper layer. The extrusion temperature can be set appropriately depending on the raw material, but it is usually between 200°C and 400°C.

[0028] The barrier properties of the barrier layer 202 can be evaluated by the following method, and it is preferable that it satisfies either (Condition 1) or (Condition 2) below, and in particular, it is preferable that it satisfies both (Condition 1) and (Condition 2) below.

[0029] (Condition 1) The following operations (1) to (4) using the barrier layer are performed five times, and no ethanol penetration is visually confirmed in any of the five test pieces obtained. (1) Prepare a test specimen on which the barrier layer is provided on the substrate. (2) Place the test piece on a flat surface with the barrier layer facing upwards. It is preferable to do this without touching the surface of the barrier layer. (3) Using a dropper, drop three drops of ethanol (purity 99.5% or higher) onto the barrier layer from a height of 25 mm. It is preferable to do this so that the dropper does not touch the barrier layer. (4) After 10 minutes, wipe off the ethanol adhering to the barrier layer with a tissue. If all the ethanol has evaporated, wiping is not necessary. The type of base material is not particularly limited as long as it can form a barrier layer, and examples include paper (it may be paper other than the paper used as the paper layer), the material for the concealing layer described later, etc. As this paper, for example, the printing paper, packaging paper, or tissue paper mentioned above can be used. Furthermore, the base material may contain fragrance components, and for example, a paper layer may be used. The test specimen may be made by removing the barrier layer from tobacco product packaging and applying it to the base material, or by applying a layer made of the same material as the barrier layer and having the same thickness to the base material, or if the packaging material has layers other than the paper layer and the barrier layer, the test specimen may be made by removing these layers. Furthermore, the size of the test specimen is not particularly limited as long as the above operation can be performed, and can be appropriately determined according to the size of the tobacco product packaging material 200, for example, it may be 20mm x 20mm, 30mm x 30mm, 40mm x 40mm, or 50mm x 50mm, etc. Furthermore, the above evaluation will be conducted in an environment with a temperature of 23°C ± 1°C and a humidity of 50% ± 3%. Figure 2 shows an example of the visual observation results of ethanol penetration in the above test. The evaluation results of this penetration observation can be similarly applied to the evaluation results of penetration observation in (Condition 2) and (Condition 2') below. Figure 2 shows how the penetration is observed visually when paper is used as the substrate and penetration occurs on the paper, regardless of whether the test is (Condition 1) or (Condition 2).

[0030] (Condition 2) If the third layer is not provided on the side of the barrier layer opposite to the side on which the paper layer is provided, then (Condition 2-1) below is satisfied, and if the third layer is provided on the side of the barrier layer opposite to the side on which the paper layer is provided, then (Condition 2-2) below is satisfied. (Condition 2-1) A substrate is laminated on the side of the barrier layer opposite to the side on which the paper layer is provided, a fragrance is applied to the paper layer to a basis weight of 10 gsm, and no penetration of the fragrance into the substrate is visually observed after 14 days. (Condition 2-2) Using packaging material for tobacco products, a fragrance is applied to the paper layer to a basis weight of 10 gsm, and no penetration of the fragrance into the base material is visually observed after 14 days.

[0031] The test described in (Condition 2) above may be replaced by the test described in (Condition 2') below. (Condition 2') The following operations (1) to (3) are performed using the barrier layer, and no penetration of the fragrance into the substrate is visually observed in the obtained test specimen. (1) Prepare a test specimen in which paper is laminated (adhered) to one side of a barrier layer and a substrate to the other side. The barrier layer may be a barrier layer taken from tobacco product packaging, and the two types of substrates used on both sides of the barrier layer may be the same or different. (2) Apply the fragrance to the paper so that the basis weight is 10 gsm. (3) Keep the product in place for 14 days after applying the fragrance.

[0032] The test described in (Condition 2) above may be replaced by the test described in (Condition 2'') below. (Condition 2'') After applying the fragrance to the paper layer to a basis weight of 10 gsm and holding it for 14 days, no fragrance seepage occurs on the side of the barrier layer opposite to the side where the paper layer is present. Whether or not fragrance seepage has occurred on the surface of the barrier layer in (Condition 2'') can be observed visually. Furthermore, since the evaluation criteria for seepage in (Condition 2'') are substantially the same as the evaluation criteria for penetration in (Condition 2) above, for example, if a test is conducted using packaging material in which paper is provided on the surface of the barrier layer opposite to the side where the paper layer exists (or, if such packaging material is used, if paper is provided on the surface of the barrier layer opposite to the side where the paper layer exists and the test is conducted), if the test result of "no penetration" shown in Figure 2 is observed, it can be determined that there is "no seepage", and if the test result of "penetration present" is observed, it can be determined that there is "penetration present".

[0033] The tests in (Condition 2), (Condition 2'), and (Condition 2'') above are conducted by positioning the test object so that the paper layer (or paper) to which the fragrance is applied is facing vertically upward.

[0034] Since there is no difference in the barrier layer between the tests described in (Condition 2), (Condition 2'), and (Condition 2''), the same evaluation results are usually obtained. The third layer in (Condition 2) above refers to a layer other than the paper layer and barrier layer containing the fragrance component, and its form is not particularly limited; for example, it can be a concealing layer as described later. The type of paper can be similarly treated according to the conditions in (Condition 1) above. Furthermore, the type of base material and the size of the test specimen can be independently treated according to the conditions in (Condition 1) above. If the packaging structure consists of three or more layers comprising a paper layer containing the fragrance component, a barrier layer, and a third layer other than these layers in that order, the third layer can be considered the base material and the test in (Condition 2) above can be performed.

[0035] [Other layers] The tobacco product packaging material 200 may further include layers other than the paper layer 201 and barrier layer 202 described above (other layers), for example, an opacity layer 203 on the side opposite to where the paper layer 201 is located relative to the barrier layer 202, or a coating layer 204 or an adhesive layer as the outermost layer on the side opposite to where the paper layer is located relative to the barrier layer 202.

[0036] [Concealing layer] As shown in Figure 3, the tobacco product packaging material 200 may further include an opacity layer 203 on the side opposite to the side where the paper layer is located when viewed from the barrier layer. By including an opacity layer, the visibility of the paper layer is reduced when the paper layer is observed from the side with the opacity layer, thereby further suppressing deterioration of appearance caused by flavoring components that may occur on the paper layer (for example, stains caused by flavoring components such as fragrances) and deterioration of appearance caused by stains from tobacco components. The method for forming the concealing layer is not particularly limited. Examples include coating the barrier layer 202 with a molten liquid of the material constituting the concealing layer 203 and then curing it; coating a solution in which the material constituting the concealing layer 203 is dissolved or dispersed in a solvent, then removing the solvent and curing it; providing the concealing layer on the barrier layer 202 by various printing means such as flexographic printing; or forming an extruded resin in the form of a film on the barrier layer. The solvent is not particularly limited as long as it can dissolve or disperse the material constituting the concealing layer 203.

[0037] The material of the opacity layer 203 is not particularly limited as long as it has opacity, but examples include the paper layer mentioned above, a resin containing an opacifier, or ink. The opacifier used in the opacity layer is not particularly limited, and known opacifiers can be suitably used. Examples include white pigments such as titanium dioxide, zinc sulfide, zinc oxide, barium sulfate, calcium carbonate, talc, or mica, or black pigments such as carbon black or composite oxide pigments. These may be used individually, or two or more may be mixed in any ratio and combination. Furthermore, the concealing layer may consist of multiple layers. In this case, it is preferable to have a layer containing black pigment and a layer containing white pigment in that order, on the side opposite to the side where the paper layer is located relative to the barrier layer. By using this order, the concealing properties of the packaging material can be further enhanced and light-shielding properties can be imparted to the packaging material, while maintaining a white appearance, compared to the case where only a layer containing white pigment is used as the concealing layer.

[0038] The volume-average particle size of the opacifier used in the opacity layer material is not particularly limited, but is usually 0.01 μm or larger, preferably 0.1 μm or larger, more preferably 0.5 μm or larger, and usually 50 μm or smaller, preferably 10 μm or smaller, and more preferably 2 μm or smaller. The volume-average particle size of the opacifier used in the opacity layer material can be obtained by measuring the raw material opacifier using a known method. The resin used for the concealing layer is not particularly limited, and any known resin can be suitably used. For example, natural resins such as rosin resins and synthetic resins such as acrylic resins can be used.

[0039] The materials used for the opacity layer ink are not particularly limited and should be able to dissolve or disperse the opacifier mentioned above. Examples of ink materials other than the opacifier mentioned above include solvents, dispersants, viscosity modifiers, and defoamers, but are not limited to these.

[0040] The thickness of the concealing layer 203 is not particularly limited, but is usually 0.1 gsm or more, preferably 1 gsm or more, more preferably 2 gsm or more, and usually 15 gsm or less, preferably 10 gsm or less, and more preferably 5 gsm or less. If the concealing layer 203 consists of multiple layers, the above thickness may be treated as the total thickness or as the thickness of each individual layer.

[0041] [Coating layer] As shown in Figure 4, the tobacco product packaging material 200 may further include a coating layer 204 as the outermost layer on the side opposite to the side where the paper layer 201 is located when viewed from the barrier layer 202. By providing the coating layer 204, for example, when the tobacco product packaging material 200 is laminated (e.g., wound on a bobbin), it is possible to prevent the fragrance components contained in the paper layer from migrating to the concealing layer. Furthermore, it is preferable that the material of the coating layer does not have adhesive properties in relation to the fragrance components contained in the paper layer. The method for forming the coating layer 204 is not particularly limited. For example, a method of coating the barrier layer 202 or the concealing layer 203 with a molten liquid of the material constituting the coating layer 204 and then curing it; a method of coating a solution in which the material constituting the coating layer 204 is dissolved in a solvent, then removing the solvent and curing it; a method of providing the coating layer on the barrier layer 202 or the concealing layer 203 by flexographic printing or gravure printing; or a method of coating the barrier layer 202 or the concealing layer 203 using the above-described coating apparatus. To layer Methods such as providing a solvent are mentioned. The solvent is not particularly limited as long as it can dissolve the material constituting the coating layer 204.

[0042] The material of the coating layer 204 is not particularly limited as long as it can be coated, but from the viewpoint of being excellent in not having adhesive properties in relation to the fragrance components contained in the paper layer, for example, acrylic; nitrocellulose or cellulose derivatives such as ethylcellulose; or aqueous dispersion emulsions of polyolefins, acrylics, etc. are preferred.

[0043] The basis weight of the coating layer 204 is not particularly limited, but may be 0.1 gsm or more, preferably 10 gsm or less, more preferably 4 gsm or less, and even more preferably 2 gsm or less.

[0044] [Glue layer] The tobacco product packaging material 200 may include an adhesive layer for bonding each layer together. For example, the adhesive layer can be provided between the barrier layer 202 and the concealing layer 203. The material of the adhesive layer is not particularly limited as long as it can bond the two layers to be bonded together. Examples include starch-based or vinyl acetate-based materials. Specifically, examples include starch or vinyl acetate. The basis weight of the adhesive layer is not particularly limited, but may be 0.3 gsm or more, preferably 4 gsm or less, more preferably 2 gsm or less, and even more preferably 1.5 gsm or less.

[0045] From the viewpoint of improving the problems of high manufacturing costs and difficulty in recyclability when used as packaging material, it is preferable that the tobacco product packaging material 200 does not contain a metal layer such as aluminum foil or other metal foil. Furthermore, in this specification, this metal layer does not include a layer containing metal powder such as metal pigment, for example, a printing layer containing metal pigment.

[0046] Furthermore, the tobacco product packaging material 200 may have ink related to the design or brand logo printed on the surface of the outermost layer opposite to the side where the paper layer 201 is located, as viewed from the barrier layer 202.

[0047] <Manufacturing method for tobacco product packaging> The method for manufacturing the tobacco product packaging material 200 is not particularly limited and can be manufactured by known methods capable of producing laminates, or by combining known methods. Specific examples of manufacturing methods are shown below. (1) One method involves applying a solution in which the material constituting the barrier layer 202 is dissolved in a solvent onto the paper layer 201, removing the solvent from the solution to form the barrier layer, and then incorporating the fragrance component into the surface of the paper layer 201 by methods such as coating or dropping. (2) A method is to apply a solution in which the material constituting the barrier layer 202 is dissolved in a solvent onto the paper layer 201, remove the solvent from the solution to form the barrier layer, then apply an adhesive layer thereon, laminate the second paper layer 203, and then impart the fragrance component to the surface of the first paper layer 201 by methods such as coating or dropping. In methods (1) and (2) described above, a wet laminator can be used. Furthermore, the solvent used in these methods is not particularly limited as long as it can dissolve the material constituting the barrier layer 202. (3) Materials constituting the barrier layer 202 on the paper layer 201 of One method involves applying a molten resin, allowing the resin to harden to form a barrier layer, and then incorporating a fragrance component into the surface of the paper layer 201 by methods such as coating or dropping. In method (3) above, an extruder can be used. (4) A paper layer 201 containing fragrance components by methods such as coating or dripping, and a barrier layer 202 made by coating or extrusion methods are prepared, and as described in the description of the adhesive layer above, each layer is connected with an adhesive layer. Furthermore, other layers such as the concealing layer 203 and the coating layer 204 can be formed by the same method as described above or by other preferred methods.

[0048] <Uses of packaging materials for tobacco products> The tobacco product packaging material 200 described above can be used to the extent possible, but it is preferably used for the tobacco product packaging described below.

[0049] <Packaging for tobacco products> Another embodiment of the present invention, a tobacco product package (hereinafter also simply referred to as "tobacco product package" or "package"), is a package formed from tobacco product packaging material, The aforementioned tobacco product packaging material is the tobacco product packaging material described above (hereinafter also simply referred to as "packaging material"), The aforementioned paper layer side The packaging material for tobacco products is designed so that the side is on the inside. formedEquipped with tobacco products stored in an internal compartment, This is packaging for tobacco products. The following describes specific embodiments of tobacco product packaging. Embodiments 1 and 2 below are examples of packaging that uses adhesive to bond the components, but the packaging may not use adhesive. For example, the tobacco product packaging material 200 may be folded to contain the tobacco product.

[0050] <Embodiment 1> Figure 5 is an external perspective view of the tobacco product package 1 according to Embodiment 1. Figure 6 is a plan view showing a sheet-like tobacco product packaging material 2 for forming the package 1 according to Embodiment 1. The package 1 has a roughly rectangular box shape and has an outer cover 3 for housing a bundle of tobacco products by folding the sheet-like packaging material 2 shown in Figure 6. A sealed internal storage compartment is formed inside the outer cover 3 of the package 1, and the tobacco products are housed in this internal storage compartment.

[0051] Figure 5 shows the front, back, up, down, left, and right directions of package 1. However, these directions are used to explain the relative positional relationships of the parts of package 1 and do not represent the absolute orientation of package 1. Furthermore, the up and down direction of package 1 can be called the "height direction," the left and right direction can be called the "width direction," and the front and back direction can be called the "depth direction."

[0052] The outer cover 3 of package 1 is formed by folding a sheet-like packaging material 2 and applying an adhesive such as glue to the edges of the packaging material 2 to bond them together, thereby sealing the internal compartment that holds the tobacco product. In the example shown in Figure 6, the packaging material 2 is rectangular in shape and is folded around the tobacco product to form the outer cover 3 that seals the tobacco product. The layer structure and details of the packaging material 2 will be described later.

[0053] Here, the reference numeral 31 in Figure 5 indicates an adhesive portion formed by overlapping the edges of the outer covering 3 (packaging material 2) and bonding them together with an adhesive such as glue. The adhesive portion 31 includes a horizontal adhesive portion 31A that extends along the width direction (left-right direction) of the package 1 and a vertical adhesive portion 31B that extends along the height direction (up-down direction) of the package 1. When the horizontal adhesive portion 31A and the vertical adhesive portion 31B are not distinguished, it is simply referred to as the adhesive portion 31. In this embodiment, the adhesive portion 31 is formed by overlapping the edges of the outer covering 3 (packaging material 2) in a gabled shape. In this embodiment, a method is employed in which adhesive parts are provided to bond the packaging materials together, but a method of fixing them from the outside with adhesive tape or the like without using adhesive may also be employed.

[0054] As shown in Figure 5, the vertical adhesive sections 31B are provided on both the left and right sides of the package 1. Each vertical adhesive section 31B extends from the top to the bottom of the package 1. The horizontal adhesive section 31A traverses the entire width of the package 1 from one vertical adhesive section 31B and extends to the other vertical adhesive section 31B. The ends of the horizontal adhesive section 31A overlap with each vertical adhesive section 31B.

[0055] In addition, in the example shown in Figure 5, the lateral adhesive portion 31 A A flat, roughly M-shaped notch is formed in the center of the tip edge. This notch is the lateral adhesive portion 31 A A V-shaped knob 33 is provided. However, the knob 33 is not essential in package 1 and may be omitted as appropriate. Furthermore, there are no particular limitations on the shape, position, etc., of the knob 33.

[0056] The outer covering 3 of package 1 includes a detachable piece 34 connected to the handle 33. The detachable piece 34 is a strip-shaped body provided on the outer covering 3, demarcated by a pair of first separation lines 37 from the rear edge 35A of the upper surface 35 to the front surface 36. The first separation lines 37 extend upward from both ends of the V-shaped handle 33, and further extend across the upper surface 35 to its rear edge 35A. In addition, a second separation line 38 is provided on the front surface 36 of the outer covering 3 above the handle 33. The second separation line 38 extends along the width direction of package 1. The first separation line 37 and the second separation line 38 are formed by a weak area. A "weak area" is a part of the surface of the outer covering 3 (or the packaging material 2 forming the outer covering 3) of package 1, where the strength of that part is weaker than that of other parts. For example, a weak area may be formed by processing (e.g., half-cutting) such that the thickness of the packaging material 2 is thinner than that of other parts. In this embodiment, in order to ensure the airtightness of package 1, it is preferable not to adopt a row of perforations in the packaging material 2 as a "weak point". Also, reference numeral 39 in Figure 5 indicates the side surface of the outer covering 3 in package 1. When forming a weak point by half-cutting the packaging material 2, if it is placed on the side of the barrier layer 202 as explained in Figure 7, the barrier properties may be impaired, so it is preferable to place it on the paper layer 201, which does not significantly contribute to the barrier properties.

[0057] Figure 7 shows the layer structure of the packaging material 2 that forms the outer cover 3 of package 1 according to Embodiment 1. Similar to the packaging material in Figure 1, the packaging material 2 is composed of a two-layer structure comprising a paper layer 201 containing a fragrance component and a barrier layer 202 that has barrier properties against the fragrance component. Furthermore, the parts where the two packaging materials are layered may be bonded together with an adhesive such as glue.

[0058] In Figure 7, reference numeral 20B indicates the first surface of the packaging material 2, and reference numeral 20A indicates the second surface of the packaging material 2, which is located opposite the first surface 20B. 1st page 20B and 2 sides20A is formed by the surface of the material located in the outer layer of the packaging material 2. Also, reference numeral 30A, shown in Figure 7, is the outer surface of the outer cover 3 (see Figure 5), and reference numeral 30B is the inner surface of the outer cover 3. Here, the term "inner surface" is used herein to refer to the surface of the assembled package 1 (outer cover 3) that faces the internal containment formed inside the package 1 (outer cover 3) (for example, the surface that faces the tobacco product). The term "outer surface" is used herein to refer to the surface that is exposed to the outside of the package 1 (outer cover 3), i.e., the surface located on the opposite side of the "inner surface".

[0059] In the embodiment shown in Figure 7, the packaging material 2 is folded to form the package 1 (outer cover 3). The second surface 20A of the packaging material 2 is positioned facing outwards to form the outer surface 30A of the outer cover 3, and the first surface 20B of the packaging material 2 is positioned facing inwards (towards the internal storage area, towards the tobacco product) to form the inner surface 30B of the outer cover 3.

[0060] As shown in Figure 7, the layer structure of the packaging material 2 is such that the paper layer 201 and the barrier layer 202 are laminated from the first surface 20B (the inner surface 30B of the outer cover 3 in the package form) to the second surface 20A (the outer surface 30A of the outer cover 3 in the package form). In addition, in the layer structure of the packaging material 2 shown in Figure 7, the barrier layer 202 forms the outer layer of the packaging material 2.

[0061] The tobacco product contained in the internal compartment of package 1 in this embodiment is not particularly limited, and various products containing tobacco raw materials can be used. For example, the tobacco product may be smoking articles such as cigarettes, cigars, or cigarillos, or snuff such as snus. The tobacco product contained in package 1 may also be a non-combustible smoking article equipped with a carbonaceous heat source and an aerosol generating unit. The tobacco product may also be a tobacco stick used in non-combustible heated tobacco products.

[0062] Next, with reference to Figure 6, the folding configuration of the packaging material 2 when assembling package 1 will be explained. As described above, the packaging material 2 shown in Figure 6 has a rectangular sheet shape. Figure 6 is a plan view (unfolded view) of the first surface 20B of the packaging material 2 (the surface that becomes the inner surface 30B of the outer cover 3) viewed from above. 6 The dashed lines shown indicate the fold lines formed in the packaging material 2. As is clear from the plan view (unfolded view) shown in Figure 6, each region of the packaging material 2 demarcated by the fold lines forms the respective parts of the outer covering 3 shown in Figure 5.

[0063] More specifically, each region of the packaging material 2 includes a lower front region 64 which is part of the front surface 36 of the outer covering 3, a bottom region 80 which is located sequentially above the lower front region 64 and is the bottom surface of the outer covering 3, a rear region 86 which is the rear surface of the outer covering 3, a top region 92 which is the top surface of the outer covering 3, and an upper front region 98 which is the remaining part of the front surface 36 of the outer covering 3. Furthermore, to the left and right of regions 64, 80, 86, 92, and 98 are side regions 66, 82, 88, 94, and 100 which form the sides of the outer covering 3, respectively.

[0064] Furthermore, notches 74 and 102 are formed at the lower end of the lower front region 64 and the upper end of the upper front region 98 of the packaging material 2, forming a V-shaped tab 33. On the other hand, the lower front region 64, the upper front region 98 and the upper surface region 92 are provided with the aforementioned separation piece 34, i.e., the weak portion 106 that forms the first separation line 37 and the weak portion 76 that forms the second separation line 38. The dashed lines in the side regions 82 and 94 of the packaging material 2 indicate that gusset folding is performed in these side regions 82 and 94 when the packaging material 2 is folded. In addition, the lower edge portions 54a (shown by hatching in Figure 6) of the lower front region 64 and the side region 66 and the upper edge portions 54b (shown by hatching in Figure 6) of the upper front region 98 and the side region 100 are overlapped and a lateral adhesive portion 31A is formed with glue or other adhesive. Furthermore, in the left and right side regions of the packaging material 2, the outer edges 50a (shown by hatching in Figure 6) of the same side region are overlapped, and a vertical adhesive portion 31B is formed using an adhesive such as glue. The lower edge portion 54a and upper edge portion 54b of the packaging material 2 and the pair of outer edges 50a are connected at their ends to form a square shape overall in the outer edge region of the packaging material 2.

[0065] The packaging material 2, configured as described above, is folded around a bundle of tobacco products to form an outer cover 3 having an internal storage section for sealing the tobacco products. When the packaging material 2 is formed into a package, first, with the bundle of tobacco products placed on the rear surface area 86 etc. of the packaging material 2, each area of ​​the packaging material 2 is sequentially folded along the fold lines. At this time, the lower edge portions 54a of the lower front area 64 and the side area 66 and the upper edge portions 54b of the upper front area 98 and the side area 100 are adhered to each other so as to overlap. At this time, the overlapped edges of the packaging material 2 are joined together. 1 The adhesive portions formed as the outer layer on the surface 20B side are bonded together so that they overlap.

[0066] As a result, a lateral adhesive portion 31A is formed by bonding the adhesive portions together.

[0067] Once the aforementioned lateral adhesive portion 31A is formed, the packaging material 2 forms rectangular portions that protrude from both sides of the bundle of tobacco products. These rectangular portions undergo gusset folding in the side regions 82 and 94, and the side regions 66, 82, 88, 94, and 100 are folded along the fold lines to cover the corresponding side of the bundle of products, forming the sides of the outer cover 3. Note that the gusset folding in the side regions 82 and 94 is shown in Figure 6 The process is carried out along the dashed lines within the side regions 82 and 94 shown. When folding side regions 66, 82, 88, 94, and 100, the outer edges of the same side side regions in the packaging material 2 are bonded together so that they overlap. As a result, each vertical bonded portion 31B is formed by bonding the bonded portions together.

[0068] As described above, the outer cover 3 is formed from the packaging material 2, and the molding of the package 1, in which the tobacco product is sealed in the internal container, is completed. The packaging material 2 in this embodiment comprises a paper layer 201 and a barrier layer 202. This makes it possible to provide a packaging material 2 and a package 1 (outer cover 3) using the same that can suppress the seepage of the flavoring components contained in the paper layer to the outside and deterioration of the appearance.

[0069] figure 8 Figure 8 schematically shows the cross-sectional structure of the outer cover 3, including the adhesive portion 31, in the package 1 according to Embodiment 1. Figure 8 shows the cross-sectional structure of the outer cover 3 in the adhesive portion 31 and its surrounding area. Also, the reference numeral AS shown in Figure 8 represents the internal storage portion AS sealed by the outer cover 3. However, the illustration of the tobacco product stored in the internal storage portion AS is omitted in Figure 8. Figure 8 also shows enlarged views of regions A and B enclosed by dashed lines. Also, the reference numeral 20C shown in Figure 8 represents the edge of the packaging material 2. The adhesive portion 31 is formed by bonding the edges 20C of the packaging material 2 together in a gusseted manner while overlapping each other.

[0070] As shown in the enlarged view of region A in Figure 8, the paper layer 201 and the barrier layer 202 are laminated in that order from the inner surface 30B of the outer covering 3 (the first surface 20B of the packaging material 2), with the barrier layer 202 forming the outer surface 30A of the outer covering 3. In addition, the paper layer 201 located on the first surface 20B of the packaging material 2 forms the inner surface 30B of the outer covering 3.

[0071] Here, as shown in the enlarged view of region B in Figure 8, in this embodiment, a barrier layer 202 having barrier properties is placed immediately outside the paper layer 201. This allows the barrier layers 202 to be brought into close contact with each other at the adhesive portion 31.

[0072] The layer structure of the packaging material 2 in this embodiment is not limited to the layer structure described in Figure 7, and various forms can be adopted. For example, the layer structure may be replaced with the one shown in Figure 3 or Figure 4. By replacing the layer structure with the one shown in Figure 3 or Figure 4, the package is configured so that the concealing layer is on the outside of the paper layer containing the fragrance component and the barrier layer. As a result, the concealing layer hides the paper layer containing the fragrance component and the barrier layer, thus eliminating the problem of poor appearance.

[0073] <Embodiment 2> Next, package 1A according to Embodiment 2 will be described. In this embodiment, the same reference numerals are used for components that are the same as those described above, and detailed explanations will be omitted. Figure 9 is an external perspective view of package 1A according to Embodiment 2. Figure 10 is a plan view of the packaging material 2C for forming the outer casing 3A of package 1A according to Embodiment 2.

[0074] In the example shown in Figure 9, package 1A has a roughly rectangular box shape. Package 1A has an outer cover 3A which is formed into a package shape by folding the sheet-like packaging material 2C shown in Figure 10 and bonding the edges of the packaging material 2C together by heat sealing. A An internal storage compartment is formed inside the outer casing 3A, and tobacco products are stored in this internal storage compartment.

[0075] Figure 9 shows the front, back, up, down, left, and right directions of package 1A. However, these directions are used to explain the relative positional relationships of the parts of package 1A and do not represent the absolute orientation of package 1A. Furthermore, the up and down direction of package 1A can be called the "height direction," the left and right direction can be called the "width direction," and the front and back direction can be called the "depth direction."

[0076] In the figure, reference numeral 34 denotes the top surface of package 1A, reference numeral 36 denotes the front surface of package 1A, and reference numeral 39 denotes the side surface of package 1A. package 1A has an opening 11 from which tobacco products can be removed from inside the outer cover 3A, and this opening 11 is covered by a cover flap 12. The cover flap 12 is attached to the surface of the outer cover 3A, for example, using a weak adhesive, and is a removable cover. The cover flap 12 has a tab 12A. The user removes the cover flap 12 from the outer cover by grasping the tab 12A and pulling up the cover flap 12. 3 By peeling off at least a portion of the outer surface 30A of A and opening the removal opening 11, the tobacco product stored in the internal storage compartment can be removed.

[0077] Figures 11 to 14 illustrate the folding procedure of the packaging material 2C when assembling package 1A according to Embodiment 2. As shown in Figure 10, a sheet-like packaging material 2C is prepared. As shown in Figure 10, the packaging material 2C has a rectangular shape. The packaging material 2C also has an opening 11 for dispensing, and a cover flap 12 is attached to the second surface 20A of the packaging material 2C using a weak adhesive so as to cover this opening 11. In Figure 10, the folding lines of the packaging material 2C are not shown.

[0078] When assembling package 1A, first, as shown in Figure 11, the packaging material 2C is folded in a U-shape along the fold lines (not shown) around the bundle of tobacco products TA. In this state, the packaging material 2C forms rectangular portions 41 and 42 that protrude from the end faces of the bundle of tobacco products TA. Then, as shown in Figures 12 and 13, the rectangular portions 41 and 42 are folded along the end faces of the bundle of tobacco products TA, with rectangular portion 42 overlapping rectangular portion 41, and the rectangular portions 41 and 42 adhering to each other.

[0079] Next, in the packaging material 2C, the protruding portions that extend from both sides of the bundle of tobacco products TA are gusset-folded to form trapezoidal flaps 43-46 as shown in Figure 14. Next, the trapezoidal flaps 43-46 are folded along their respective base ends. At this time, trapezoidal flap 43 is placed on top of trapezoidal flap 44, and these trapezoidal flaps 43 and 44 are adhered to each other. Adhesion Part 31 is formed. Similarly, the trapezoidal flap 45 is placed on top of the trapezoidal flap 46, and these trapezoidal flaps 45 and 46 are bonded together to form the bonded part 31 (see Figure 9). As a result, the molding of package 1A as shown in Figure 9 is completed. I'm done.

[0080] Figure 15 is a schematic diagram showing the cross-sectional structure near the adhesive portion 31 in package 1A according to Embodiment 2. In Figure 15, the illustration of the tobacco product contained in the internal storage portion AS is omitted. Figure 15 also schematically shows an enlarged view of the area C enclosed by the dashed line. In package 1A (outer cover 3A), the adhesive portion 31 is formed by overlapping the inner surface 30B (first surface 20B in packaging material 2C) of the upper trapezoidal flap 45 with the outer surface 30A (second surface 20A in packaging material 2C) of the lower trapezoidal flap 46 of a pair of trapezoidal flaps 45, 46 that are superimposed on each other. The manner in which the trapezoidal flaps 43, 44 are attached to each other at the adhesive portion 31 on the other side surface 39 of package 1A (outer cover 3A) is the same as the manner in which the trapezoidal flaps 45, 46 are attached to each other as shown in Figure 15. In other words, the package 1A according to Embodiment 2 has adhesive layers 23 formed by adhesive on the outer surface 30A (second surface 20A of the packaging material 2C) and the inner surface 30B (first surface 20B of the packaging material 2C), and the adhesive portion 31 is formed in an overlapping form by overlapping and bonding the adhesive layer 23 formed on one inner surface 30B (first surface 20B of the packaging material 2C) side and the adhesive layer 23 formed on the other outer surface 30A (second surface 20A of the packaging material 2C) side of the edges of the packaging material 2C.

[0081] As described above, the packaging material in this embodiment 2 C and the package 1A formed therefrom provide the same effects as the packaging materials and packages described in Embodiment 1 and each of its modifications. That is, it is possible to seal the tobacco product TA without sealing the package 1A with a separate outer resin film, and by reducing the amount of resin material used, it is possible to provide packaging materials 2C and packages 1A that are more environmentally friendly than conventional ones.

[0082] Furthermore, a package 1 formed using the packaging material according to Embodiment 1 and Embodiment 2 described above. and 1A The product may be distributed in pillow packaging as shown in Figure 5 or Figure 9, or it may be distributed in a form incorporated into the outer packaging of known hard or soft packages.

[0083] While embodiments of the tobacco product packaging material and the package formed therefrom according to the present invention have been described above, each embodiment disclosed herein can be combined with any other features disclosed herein.

[0084] In the measurement of each characteristic described herein, unless otherwise specified, the sample to be measured shall be kept in an environment similar to the environment in which it will be measured for at least 48 hours before measurement. Furthermore, unless otherwise specified, the measurement temperature, measurement humidity, and measurement pressure shall be normal temperature (22±2℃), normal humidity (60±5%RH), and normal pressure (atmospheric pressure). [Examples]

[0085] The present invention will be described in more detail below with reference to examples. However, the present invention is not limited to the following examples.

[0086] <Experiment 1: Evaluation of barrier properties> [Evaluation of barrier properties] [Reference example 1] The barrier properties of various materials were evaluated using the following method. The following procedures (1) to (4) were performed five times, and the degree of ethanol penetration was observed in the five resulting test pieces. (1) When polyolefin aqueous dispersion (Chemipearl A100, manufactured by Mitsui Chemicals), polyvinyl alcohol (PVA117, manufactured by Kuraray Co., Ltd.), ethylcellulose, or nitrocellulose was used as the barrier layer material, a film was formed on paper using the gravure printing method, with the material shown in Table 1 having the weight per unit area (final basis weight of the barrier layer) or film thickness shown in Table 1. This film was then cut into 50mm x 50mm pieces and used as a test specimen. When low-density polyethylene (LDPE, Sumikasen L420, manufactured by Sumitomo Chemical Co., Ltd.) was used as the barrier layer material, molten polyethylene was extruded onto the surface of the paper using an extruder, then cooled and solidified to form a barrier layer of the thickness shown in Table 1. This was then cut into 50mm x 50mm pieces and used as a test specimen. (2) The test specimen was placed on a flat surface with the film side facing upwards. This was done without touching the surface of the film. (3) Three drops of ethanol (purity 99.5% or higher) were dropped onto the film from a height of 25 mm using a dropper. This was done in a way that the dropper did not touch the film. (4) After 10 minutes, the ethanol adhering to the film was wiped off with tissue paper. In all five visual observations of the five test pieces used above, those in which no penetration was observed were designated as "T," and all others were designated as "F," as shown in Table 1. Furthermore, the above evaluation was conducted in an environment with a temperature of 23°C ± 1°C and a humidity of 50% ± 3%. Note that the basis weight (gsm) in Table 1 is the weight per unit area, and this weight is the dry weight.

[0087] [Table 1]

[0088] Table 1 shows that the films in Reference Examples 2-3, 5-6, 8-9, and 11-14 possess barrier properties and can be used as barrier layers.

[0089] <Experiment 2: Evaluation of absorption of tobacco product packaging> <Manufacturing of packaging materials for tobacco products> [Example 1] First, a paper layer (Raicho 60gsm, manufactured by Chuetsu Pulp & Paper Co., Ltd.) and solution A, prepared by dissolving ethylcellulose in ethyl acetate to a solid content concentration of 10% by weight, were prepared. Solution A was then gravure printed onto the surface of the paper layer to create a barrier layer with a weight per unit area (final barrier layer basis weight) of 0.5 gsm. Next, using a gravure printing machine, one black ink layer as an opacity layer was printed to a thickness of 1 gsm, two white ink layers as opacity layers were printed to a thickness of 2 gsm each, and a coating layer was printed to a thickness of 1 gsm. After this, a mixture of fragrance and solvent was applied to the surface of the paper layer using a nozzle to a density of 10 gsm, thereby manufacturing packaging material for tobacco products.

[0090] [Example 2] Regarding the formation of the opacity layer, tobacco product packaging was manufactured in the same manner as in Example 1, except that only one layer of black ink, serving as the opacity layer, was printed to a thickness of 1 gsm.

[0091] [Example 3] Regarding the formation of the opacity layer, the tobacco product packaging material was manufactured in the same manner as in Example 1, except that one black ink layer as the opacity layer was printed to be 1 gsm thick, followed by one white ink layer as the opacity layer to be 2 gsm thick.

[0092] [Example 4] Regarding the formation of the barrier layer, tobacco product packaging was manufactured in the same manner as in Example 1, except that molten low-density polyethylene (LDPE, Sumikasen L420 manufactured by Sumitomo Chemical Co., Ltd.) was extruded onto the surface of the paper layer using an extruder, and then cooled and solidified to provide a barrier layer of the thickness shown in Table 2.

[0093] [Comparative Example 1] Except for setting the weight per unit area of ​​solution A printed on the surface of the paper layer (the basis weight of the final barrier layer) to 0.25 gsm, a tobacco product packaging material was manufactured in the same manner as in Example 1.

[0094] <Characteristic Evaluation> After manufacturing each tobacco product packaging material using the method described above, the tobacco product packaging materials were packed using a tobacco packaging machine (a packing method that assembles without sealing, which is common) and their packaging suitability was evaluated. In Table 2, "○" indicates that no fragrance seepage occurred in the concealing layer of the product packaging material at the time of packing, and "×" indicates that fragrance seepage occurred in the concealing layer of the product packaging material at the time of packing. Furthermore, the packages were opened 3, 7, and 14 days after packing to check for any leakage of fragrance. In Table 2, "○" indicates that no leakage occurred, and "×" indicates that leakage occurred. Note that packages marked "×" in the above packaging suitability assessment were not evaluated for leakage. The evaluation of the occurrence of this seepage can be considered as an evaluation of the barrier properties in (Condition 2') described above, and the concealing layer described above corresponds to the substrate in (Condition 2') in the evaluation of barrier properties described above. Furthermore, for those marked with "○" in the penetration evaluation in Table 2, no deterioration in appearance was observed when the paper layer was observed from the side with the concealing layer.

[0095] [Table 2] [Explanation of symbols]

[0096] 1. Package 2...Packaging material 3... Outer cover 201...Paper layer 202... Barrier layer 203...Concealing layer 204... Coat layer

Claims

1. A sheet-like packaging material for packaging tobacco products, A paper layer containing fragrance components, The system comprises at least a barrier layer having barrier properties against the aforementioned fragrance components, The barrier layer is a nonmetallic layer, A packaging material for tobacco products in which the barrier layer satisfies the following (condition 1). (Condition 1) The following operations (1) to (4) using the barrier layer are performed five times, and no ethanol penetration is visually confirmed in any of the five test pieces obtained. (1) Prepare a test specimen in which the barrier layer is provided on the substrate. (2) Place the test piece on a flat surface so that the barrier layer side is facing upwards. (3) Using a dropper, drop three drops of ethanol (purity 99.5% or higher) onto the barrier layer from a height of 25 mm. (4) After 10 minutes, wipe off the ethanol adhering to the barrier layer with tissue paper.

2. A sheet-like packaging material for packaging tobacco products, A paper layer containing fragrance components, The system comprises at least a barrier layer having barrier properties against the aforementioned fragrance components, The barrier layer is a nonmetallic layer, Packaging material for tobacco products that satisfies the following (condition 2). (Condition 2) If the third layer is not provided on the side of the barrier layer opposite to the side on which the paper layer is provided, then (Condition 2-1) below is satisfied, and if the third layer is provided on the side of the barrier layer opposite to the side on which the paper layer is provided, then (Condition 2-2) below is satisfied. (Condition 2-1) A substrate is laminated on the surface of the barrier layer opposite to the surface on which the paper layer is provided, and a fragrance is applied to the paper layer to a basis weight of 10 gsm. After holding for 14 days, no penetration of the fragrance into the substrate is visually observed. (Condition 2-2) Using packaging material for tobacco products, the paper layer is coated with fragrance to a basis weight of 10 gsm, and after 14 days, no penetration of the fragrance into the base material is visually observed. 。

3. The barrier layer is further provided with an opacity layer on the side opposite to the side where the paper layer is located, Packaging material for tobacco products according to claim 1 or 2.

4. The aforementioned concealing layer is a layer containing a concealing agent. Packaging material for tobacco products as described in claim 3.

5. The aforementioned concealing layer includes a paper layer, Packaging material for tobacco products according to claim 3 or 4.

6. The tobacco product packaging material according to any one of claims 1 to 5, further comprising a coating layer as the outermost layer on the side opposite to the side where the paper layer is located when viewed from the barrier layer.

7. The tobacco product packaging material according to any one of claims 1 to 6, wherein the fragrance component includes menthol.

8. A tobacco product packaging material according to claim 1, satisfying the following (condition 2). (Condition 2) If the third layer is not provided on the side of the barrier layer opposite to the side on which the paper layer is provided, then (Condition 2-1) below is satisfied, and if the third layer is provided on the side of the barrier layer opposite to the side on which the paper layer is provided, then (Condition 2-2) below is satisfied. (Condition 2-1) A substrate is laminated on the surface of the barrier layer opposite to the surface on which the paper layer is provided, and a fragrance is applied to the paper layer to a basis weight of 10 gsm. After holding for 14 days, no penetration of the fragrance into the substrate is visually observed. (Condition 2-2) Using packaging material for tobacco products, a fragrance is applied to the paper layer to a basis weight of 10 gsm, and no penetration of the fragrance into the base material is visually observed after 14 days.

9. A tobacco product packaging material according to any one of claims 1 to 8, which does not contain a metal layer.

10. A package formed from packaging material for tobacco products, The aforementioned tobacco product packaging material is the tobacco product packaging material described in any one of claims 1 to 9. The tobacco product is housed in an internal storage compartment formed by the tobacco product packaging material, with the paper layer side facing inward. Packaging for tobacco products.

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