Package

Abstract

To provide a package that has excellent formability even if it is light and soft, thin paper, is easy to fold into gazette, and prevents wrinkles and creases in the thin paper inside.SOLUTION: The package is for covering an article to be packaged using a packaging base material. The packing base material is a tubular film. The article to be packaged is a laminated body of thin paper. The number of layers of thin paper constituting the laminated body is 150 or mor and 250 or less. The laminated body is gusset-packed using the tubular film. The bending resistance of the tubular film in an MD direction is 2 mN / 10 sheets or more and 25 mN / 10 sheets or less. The height of the laminated body is 50 mm or more and 100 mm or less, and the density thereof is 0.11 g / cm3 or more and 0.23 g / cm3 or less. A sealing portion is formed at each of both ends of the tubular film in the MD direction. The difference between the dimensions between the sealing portions and the longitudinal dimension of the laminated body is 20 mm or more and 70 mm or less.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a package suitable for use in packaging paper products such as tissue paper. [Background technology]

[0002] Soft packs of tissues have been sold for some time and are convenient to carry around (see Patent Document 1). In particular, caramel-packaged and pillow-packaged tissues are widely sold. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-038229 Summary of the Invention [Problem to be solved by the invention]

[0004] Caramel packaging has good shape (in other words, appearance) and is easy to maintain its shape, so it is hard to collapse even when the amount of contents is reduced.

[0005] On the other hand, caramel packaging is difficult. Specifically, unless the height of the tissue paper stack is relatively consistent, the heat seal during packaging (specifically, sealing) is unstable. For this reason, defective products are often produced during packaging depending on the roll, due to the difference in stack height between the top and bottom rolls of the roll.

[0006] Furthermore, while pillow packaging is easy to use, the shape of the package (in other words, the appearance) is poor. In contrast, when a tube-shaped film is used, packaging is easy and the shape of the package is good.

[0007] However, when the tissue paper laminate is light (specifically, the density of the tissue paper laminate is low) and the tissue paper is soft, the shape of the package is poor, and when both ends of the tube bag are heat-sealed, it is difficult to fold the gusset (i.e., poor workability).On the other hand, if the rigidity of the film is softened to make it easier to fold the gusset, there is a problem that the film loses firmness and has poor shape.

[0008] Furthermore, if the distance between the longitudinal end of the tissue paper laminate and the heat-sealed portion is too short, it is difficult to fold the gusset (i.e., poor operability), whereas if the distance is too long, it is easy to fold the gusset, but the contents tend to move easily, causing wrinkles and creases in the tissue paper (i.e., poor aesthetics).

[0009] The present invention has been made in consideration of the above circumstances, and aims to provide a package in which a stack of tissue paper is gusset-packaged in a tubular film, where the difference between the longitudinal dimension of the stack and the dimensions of the sealed portions in the tubular film is within a certain range, and which has excellent shape, is easy to fold into the gusset, and is less likely to cause the tissue paper inside to wrinkle or fold, even if the tissue paper is light and soft. [Means for solving the problem]

[0010] The inventors conducted extensive research and discovered that, in a package in which a tubular film is used to gusset-package a laminate of tissue papers, where the difference between the longitudinal dimension of the laminate and the dimensions of the sealed portions of the tubular film is within a certain range, by specifying the number of sets of tissue papers included in the laminate and the bending resistance in the MD direction of the tubular film, and further specifying the height and density of the laminate, it is possible to produce a package that is excellent in shape, easy to gusset-fold, and less likely to cause wrinkling or folding of the tissue paper inside, even when using light and soft tissue paper, and thus the above-mentioned problems can be solved, leading to the completion of the present invention.

[0011] (1) A first aspect of the present invention is a package in which a packaged item is covered with a packaging base material, the packaging base material being a tubular film, the packaged item being a laminate of tissue papers not impregnated with a lotion-based medicinal solution, the number of sets of tissue papers constituting the laminate being 150 sets or more and 250 sets or less, the laminate being gusset-packaged with the tubular film, the bending resistance in the MD direction of the tubular film being 2 mN / 10 sheets or more and 25 mN / 10 sheets or less, the height of the laminate being 50 mm or more and 100 mm or less, and the density of the laminate being 0.11 g / cm 3 More than 0.23g / cm 3 The package is characterized in that a seal portion is formed at each of both end portions in the MD direction of the tubular film, and the difference between the dimension between the seal portions and the longitudinal dimension of the laminate is 20 mm or more and 70 mm or less.

[0012] (2) A second aspect of the present invention is the packaging body according to (1), characterized in that the gusset in the gusset packaging has a folded width of 15 mm or more and 55 mm or less.

[0013] (3) A third aspect of the present invention is the packaging body according to (1), characterized in that the longitudinal dimension of the laminate is 110 mm or more and 180 mm or less.

[0014] (4) A fourth aspect of the present invention is the packaging body according to (1), characterized in that the dimension between the sealed portions is 130 mm or more and 225 mm or less.

[0015] (5) A fifth aspect of the present invention is the packaging body according to (1), wherein the tubular film has a basis weight of 32 g / m 2 More than 90g / m 2 It is characterized by the following:

[0016] (6) A sixth aspect of the present invention is the packaging body according to (1), characterized in that the thickness of the tubular film is 35 μm or more and 100 μm or less.

[0017] (7) A seventh aspect of the present invention is the packaging body according to (1), wherein the basis weight per ply of the tissue paper is 9.5 g / m 2 More than 17.5g / m 2 It is characterized by the following:

[0018] (8) The eighth aspect of the present invention is the packaging body described in (1), characterized in that the thickness of the tissue paper is 0.5 mm / 10 sheets or more and 1.1 mm / 10 sheets or less.

[0019] (9) A ninth aspect of the present invention is the packaging body according to (1), wherein the specific volume of the tissue paper is 4.0 cm 3 / g or more 8.5cm 3 / g or less.

[0020] (10) A tenth aspect of the present invention is the packaging body according to (1), characterized in that the tissue paper is V-folded. [Effects of the Invention]

[0021] According to the present invention, a package can be provided in which a stack of tissue paper is gusset-packaged in a tubular film, where the difference between the longitudinal dimension of the stack and the dimensions of the sealed portions in the tubular film is within a certain range.Even if the tissue paper is light and soft, the package has excellent shape, is easy to fold into the gusset, and is less likely to wrinkle or fold the tissue paper inside. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is a perspective view showing an example of a package of the present invention, showing the state in which an item to be packaged is packaged. [Figure 2] FIG. 1 is a perspective view showing an example of gusset packaging of the packaging body of the present invention. [Figure 3] FIG. 2 is a cross-sectional view showing an example of a gusset of the packaging body of the present invention. [Figure 4] 1 is a perspective view showing an example of an item to be packaged in the packaging body of the present invention. FIG. [Figure 5] 1 is a perspective view showing an example of an item to be packaged in the packaging body of the present invention. FIG. [Figure 6] 1 is a perspective view showing an example of an item to be packaged in the packaging body of the present invention. FIG. [Figure 7] 1 is a side view showing an example of an item to be packaged in the packaging body of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Note that the following embodiments are presented for illustrative purposes, and the configuration of the present invention is not limited to the contents of the following embodiments. Furthermore, each drawing is a schematic diagram for explaining the configuration of the present invention, and does not strictly define the dimensional relationships between components and parts.

[0024] In the description of the present invention, the MD direction refers to the direction of the production line (in other words, the conveyance direction; also referred to as the "flow direction") during the production of the packaging body 1, and the CD direction refers to the direction perpendicular to the direction of the production line (i.e., the MD direction) during the production of the packaging body 1. Note that the relationship between the orientation of the packaging body 1 (including the packaging substrate 10 and laminate 11) and the MD and CD directions in each drawing is merely an example for explaining an embodiment of the present invention, and the relationship between the orientation of the packaging body 1 (including the packaging substrate 10 and laminate 11) and the MD and CD directions in an actual production process is not limited to the relationship in each drawing.

[0025] (Overall composition) FIG. 1 is a perspective view showing an example of a package 1 according to an embodiment in a state where an article to be packaged is packaged, as an example of a specific configuration of the package according to the present invention.

[0026] The packaging body 1 in this embodiment is a packaging body in which the packaged item is covered with a packaging base material 10, the packaging base material 10 being a tubular film, the packaged item being a laminate 11 of tissue paper that is not impregnated with a lotion-based medicinal solution, the laminate 11 being gusset-packaged by the tubular film, and a seal portion 13 being formed at each of both ends in the MD direction of the tubular film.

[0027] The packaging body 1 is particularly suitable for packaging soft paper products such as tissue paper. The item to be packaged in the packaging body 1 is specifically a tissue paper laminate 11 made by laminating tissue papers that are not impregnated with a lotion-based medicinal solution, and is also referred to as a "tissue paper laminate 11" in the description of this invention.

[0028] The lotion-based chemical liquid that is not impregnated into the tissue paper is, for example, a chemical liquid containing lotion that is impregnated into general-purpose wet tissues. Examples of the lotion-based chemical liquid that is not impregnated into the tissue paper include a chemical liquid containing glycerin and silicone that can smooth the tissue paper and, by extension, the tissue paper laminate 11, and the silicone can be an amino-modified silicone.

[0029] The packaging body 1 in this embodiment covers a tissue paper laminate 11 with a packaging base material 10, and both ends of the packaging base material 10 in the MD direction are folded as gussets 12, and then a seal portion 13 is formed and sealed.

[0030] In gusset packaging, the packaging substrate 10 is fed from a roll of raw material wound with the packaging substrate 10 and cut to the length of the bag in the MD (i.e., height). A gusset 12 is formed at one end in the MD, the edges are closed, and a seal 13 is formed and joined (i.e., sealed) along the width direction (specifically, the CD direction) by heat sealing or the like, resulting in a bag with only the other end in the MD open. The other end in the MD of the bag is opened to form an insertion opening 16. As shown in Figure 2, an item to be packaged (specifically, a tissue paper laminate 11) is inserted into the packaging substrate 10 through the insertion opening 16. A gusset 12 is formed at the end on the insertion opening 16 side, the edges are closed, and a seal 13 is formed and joined (i.e., sealed) along the width direction (specifically, the CD direction) by heat sealing or the like, resulting in a bag with only the other end in the MD open. The heat seal used to form the sealed portion 13 does not necessarily have to be a straight line (a form in which the sealed portion is formed uniformly), but can be, for example, a dotted line (a form in which sealed portions and non-sealed portions are formed alternately), a wavy line, a grid pattern, etc., and any heat seal pattern is acceptable as long as the seal is formed by heat sealing.

[0031] The packaging substrate 10 may be wound as a rolled raw material in a state where a pair of mountain folds and a valley fold between the pair of mountain folds are formed on each of two mutually opposing side surfaces in the CD direction of the tubular packaging substrate 10, and these two side surfaces are folded inward (see FIG. 3). In this case, the mountain folds and the valley folds may have creases, and creases may be made along the creases.

[0032] The packaging body 1 preferably has an opening (not shown) for removing the tissue paper that makes up the tissue paper laminate 11. This opening is preferably provided by forming a tear line, such as a perforation, in the packaging base material 10 so that the opening can be opened by tearing along the tear line when in use. The tear line may be, for example, a single perforated line.

[0033] The gusset 12 is formed at each of both end portions of the packaging base material 10 in the MD direction.

[0034] FIG. 3 is a cross-sectional view of the gusset 12, specifically a cross-sectional view perpendicular to the MD direction (ie, a vertical cross-sectional view) at a position near the sealed portion 13.

[0035] The gusset 12 is formed by making valley folds on both sides of the cylindrical packaging base material 10 in the CD direction and folding them symmetrically inward.

[0036] The dimension W of the part of the gusset 12 that is folded inward in a valley fold is the folded width of the gusset 12.

[0037] The fold width of the gusset 12 is preferably 15 mm or more and 55 mm or less. If the fold width of the gusset 12 is less than 15 mm, the packaging substrate 10 is too tight against the tissue paper laminate 11, making the tissue paper more likely to wrinkle or fold. On the other hand, if the fold width of the gusset 12 exceeds 55 mm, the shape of the package 1 is reduced. The lower limit of the folded width of the gusset 12 is more preferably 17 mm or more, and even more preferably 20 mm or more, and the upper limit is more preferably 40 mm or less, and even more preferably 30 mm or less.

[0038] The tightness refers to the degree of strength with which the packaging substrate 10 envelops (and stably supports) the tissue paper laminate 11. The formability refers to the degree of appearance and good looks of the packaging body 1.

[0039] The sealed portions 13 are formed on both ends in the MD direction of the packaging substrate 10, and are generally linear strips extending along the CD direction, with both sealed portions 13 formed generally parallel to each other. The sealed portions 13 are provided so as to seal the packaging substrate 10, which is folded flat by the gusset 12 at the ends in the MD direction of the packaging substrate 10, with a sealing layer (for example, a heat seal layer).

[0040] The distance between the sealed portions 13 formed at both ends of the packaging substrate 10 in the MD direction is preferably 130 mm or more and 225 mm or less. If the distance between the sealed portions 13 is less than 130 mm, the packaging substrate 10 will be too tight against the tissue paper laminate 11, making the tissue more likely to wrinkle or fold. On the other hand, if the distance between the sealed portions 13 is more than 225 mm, the packaging substrate 10 will not be tight enough against the tissue paper laminate 11, causing the tissue paper laminate 11 to become unstable and shift inside the packaging substrate 10, making the tissue more likely to wrinkle or fold. The lower limit of the dimension between the seal portions 13 is more preferably 150 mm or more, and even more preferably 180 mm or more, and the upper limit is more preferably 210 mm or less, and even more preferably 200 mm or less.

[0041] The dimension between the seal portions 13 in the description of this invention is the dimension when the tissue paper laminate 11 is inserted into the packaging base material 10 and the packaging base material 10 is packaging the tissue paper laminate 11. The dimension between the seal portions 13 is also referred to as the "dimension C between the seal portions." The measurement may be performed by pinching the center of one of the sealed portions 13 in the longitudinal direction (CD direction of the packaging substrate 10) with one hand, lifting the entire packaging substrate 10 (at this time, the tissue paper laminate 11 within the packaging substrate 10 drops down due to its own weight to the other, i.e., the lower, sealed portion 13 in the lifted state, leaving the packaging substrate 10 taut), and measuring the distance from one sealed portion 13 to the other sealed portion 13 with a ruler. Alternatively, the measurement may be performed at the end of the sealed portion 13, and the average of the values at both ends (i.e., two points) may be used as the dimension between the sealed portions 13.

[0042] (Packaging base material) The packaging substrate 10 preferably contains at least a film substrate, and preferably does not contain a paper substrate. The packaging substrate 10 may be printed, and in that case, it is preferable that the printed surface is laminated. The basis weight values described below include the value of the printing ink.

[0043] The packaging substrate 10 preferably contains 90% by weight or more, more preferably 95% by weight or more, of a film substrate. More preferably, the packaging substrate 10 contains only a film substrate, i.e., is a film substrate. For example, a milky white film contains ash. When the film substrate contains ash, the ash is also considered to be part of the film substrate.

[0044] The packaging substrate 10 is a tubular film. A tubular film is a film obtained by forming a sheet-like film into a cylindrical shape like a tube.

[0045] The basis weight of the packaging substrate 10 (if the packaging substrate 10 is a film substrate, the basis weight of the film substrate) is 32 g / m 2 More than 90g / m 2 The basis weight of the packaging substrate 10 is preferably 32 g / m or less. 2 If the basis weight of the packaging substrate 10 is less than 90 g / m, the shape of the packaging body 1 cannot be adequately maintained, and the shape of the packaging body 1 deteriorates. 2 If it exceeds this value, it becomes difficult to fold and heat seal the gusset 12.

[0046] The lower limit of the basis weight of the packaging substrate 10 is preferably 45 g / m 2 More preferably, 54 g / m 2 The upper limit is more preferably 81 g / m 2 More preferably 72 g / m or less 2 The basis weight of the packaging substrate 10 can be measured in accordance with JIS P 8124. The basis weight of the packaging substrate 10 is a value that includes the amount of ash and ink described above.

[0047] The thickness of the packaging substrate 10 (when the packaging substrate 10 is a film substrate, the thickness of the film substrate) is preferably 35 μm or more and 100 μm or less. If the thickness of the packaging substrate 10 is less than 35 μm, the shape of the packaging body 1 cannot be adequately maintained, and the shape of the packaging body 1 deteriorates. On the other hand, if the thickness of the packaging substrate 10 exceeds 100 μm, it becomes difficult to fold and heat-seal the gusset 12.

[0048] The thickness of the packaging substrate 10 is more preferably 50 μm or more, and even more preferably 60 μm or more, and the upper limit is more preferably 90 μm or less, and even more preferably 80 μm or less. The thickness of the packaging substrate 10 can be measured in accordance with JIS K7130.

[0049] The bending resistance in the MD direction of the packaging substrate 10 (when the packaging substrate 10 is a film substrate, the bending resistance in the MD direction of the film substrate) is 2 mN / 10 sheets or more and 25 mN / 10 sheets or less. If the bending resistance in the MD direction of the packaging substrate 10 is less than 2 mN / 10 sheets, the shape of the packaging body 1 cannot be adequately maintained, and the shape of the packaging body 1 deteriorates. On the other hand, if the bending resistance in the MD direction of the packaging substrate 10 exceeds 25 mN / 10 sheets, it becomes difficult to fold the gusset 12.

[0050] The lower limit of the bending resistance in the MD direction of the packaging substrate 10 is preferably 7 mN / 10 sheets or more, more preferably 10 mN / 10 sheets or more, and the upper limit is preferably 22 mN / 10 sheets or less, more preferably 17 mN / 10 sheets or less.

[0051] The bending resistance in the MD direction of the packaging substrate 10 can be measured in accordance with JIS P 8125-1:2017 (ISO 2493). For example, it can be measured using an L&W bending tester (manufactured by Lorentzen & Wettre). Specifically, a test piece 38 mm wide and 80 mm long is set in the tester. The bending resistance (load) measured in the MD direction when the bending angle is 15 degrees and the bending length (span of the sample stage) is 10 mm is defined as the bending resistance. Note that for soft (low rigidity) samples such as films, if a single test piece is used, the bending resistance is too small to measure or it is difficult to determine the difference between test pieces. For this reason, the explanation of the present invention shows the results of measurements performed by stacking a total of 10 test pieces, five with the front side facing up and five with the back side facing up, in the tester. In this case, when chucking the test pieces, the 10 pieces are aligned to prevent misalignment before chucking.

[0052] (Film substrate) The film constituting the film substrate included in the packaging substrate 10 is preferably made up of multiple layers. That is, the packaging substrate 10 is preferably a tubular film made up of multiple layers.

[0053] If the film constituting the film substrate included in the packaging substrate 10 is a single layer, the shape of the packaging body 1 cannot be adequately maintained, and the shape of the packaging body 1 deteriorates.

[0054] As the film constituting the film substrate, a plastic (thermoplastic resin) film used in packaging ordinary paper products can be used without any particular limitations on the material of the film. The film constituting the film substrate may be surface-treated, and is preferably a matte film from the viewpoints of aesthetics and slip resistance.

[0055] Examples of materials for the plastic film include thermoplastic resins such as polyolefin (polyethylene, polypropylene, etc.), polyester (PET, etc.), polyamide (nylon, etc.), polycarbonate, polystyrene, and polyvinyl chloride, with polyethylene being preferred.

[0056] In terms of specific configuration, the film material of the outermost layer of the film substrate is preferably any one selected from the group consisting of matte polyethylene, milky white polyethylene, linear low-density polyethylene, and unstretched polypropylene. The film material of the innermost layer is preferably any one selected from the above four types of materials. The film materials of the outermost and innermost layers may be the same or different. The outermost layer of the film substrate is the layer on the outer surface when formed into the packaging body 1, and the innermost layer of the film substrate is the layer on the inner surface when formed into the packaging body 1, and is the layer (in other words, the surface) that comes into contact with the tissue paper laminate 11 contained in the packaging body 1 (packaging substrate 10).

[0057] As a specific configuration, it is more preferable that the material of the film in the outermost layer of the film substrate is a matte polyethylene, and it is more preferable that the material of the film in the innermost layer of the film substrate is a milky white polyethylene, and it is preferable that the outermost layer and the innermost layer are extrusion laminated. By using such a configuration, it is possible to improve the packaging shape and the ease of folding the gusset 12.

[0058] If the outermost layer is made of textured polyethylene, the textured polyethylene is moderately slippery, making it easier to fold the gusset 12. If the innermost layer is made of milky white polyethylene, the friction with the paper product is low, preventing the tissue paper from wrinkling or folding easily.

[0059] The method for matte-finishing a film substrate is not limited to a specific procedure or method, and conventionally known methods can be used, such as pressing the surface of the film substrate against an embossing roll or matte roll during molding to create irregularities, or sandblasting to create irregularities. Alternatively, methods such as using a polymer blend or biaxially stretching a laminate of a polyolefin resin blend may be used without performing such surface treatment. While these methods may be performed during molding of a tubular film, it is preferable to perform them on a single layer of polyethylene to obtain a matte-finish polyethylene film, which is then laminated with an innermost layer of milky white polyethylene film or the like.

[0060] When the film substrate included in the packaging substrate 10 is composed of three layers, for example, the film material of the outermost layer (i.e., the layer on the outer surface when formed into the packaging body 1) of the film substrate may be matte polyethylene, the film material of the innermost layer (i.e., the layer on the inner surface when formed into the packaging body 1) may be milky white polyethylene, and the film material of the middle layer (i.e., the laminate layer between the outermost and innermost layers) may be polyethylene. Note that the number of layers does not include the ink layer.

[0061] The lower limit of the ash content of the packaging substrate 10 is preferably 1.5% or more, more preferably 2.0% or more, and even more preferably 2.5% or more, and the upper limit is preferably 12% or less, more preferably 10% or less, and even more preferably 8.0% or less. If the ash content of the packaging substrate 10 is less than 1.5%, it becomes difficult to fold the gusset 12, resulting in reduced operability. On the other hand, if the ash content of the packaging substrate 10 exceeds 12%, the stiffness of the packaging substrate 10 decreases as the ash content increases, resulting in reduced formability of the package 1.

[0062] Specifically, the ash content refers to the proportion of minerals such as calcium, iron, sodium, magnesium, phosphorus, and potassium, and can be measured in accordance with JIS P 8251. The ash content can be calculated using the following mathematical formula 1, and in the explanation of the present invention, the bone dry mass of the test piece in the following formula is considered to be the mass of the test piece of packaging substrate 10 when conditioned at 23°C and 50% humidity. (Formula 1) Ash content (%) = Residue mass (g) ÷ Dry mass of test piece (g) × 100

[0063] The packaging substrate 10 may have other layers in addition to the film substrate. Examples of such other layers include a water vapor barrier layer, an oxygen barrier layer, a printing layer, a printability improving layer, an overprint layer, and a light-shielding layer. These other layers can be provided, for example, on the surface that contacts the tissue paper laminate 11 or the surface that is exposed to the outside air, and may consist of one layer or two or more layers.

[0064] (Packaged item) 4 to 6 are perspective views showing an example of a tissue paper laminate 11, which is an article to be packaged in the packaging body 1 (specifically, the packaging base material 10). The type of tissue paper constituting the tissue paper laminate 11 is not limited to a specific type, but may be, for example, tissue paper, wipes, paper hand towels, etc., but tissue paper (tissue paper not impregnated with a lotion-based chemical solution) is preferred, i.e., the tissue paper laminate 11 is preferably a tissue paper laminate in which tissue paper sheets are stacked. Preferably, the tissue paper is two-ply tissue paper.

[0065] The basis weight of the thin paper (for example, per ply of tissue paper) constituting the thin paper laminate 11 is 9.5 g / m 2 More than 17.5g / m 2 The basis weight of the tissue paper is preferably 9.5 g / m or less. 2 If the basis weight is less than 17.5 g / m, the tissue paper will be thin and flimsy, and will easily wrinkle or fold. 2 If the thickness exceeds this value, the height of the tissue paper laminate 11 becomes too high and bulky, making it difficult to fold the gusset 12.

[0066] The basis weight of the thin paper (for example, per ply of tissue paper) is preferably 12 g / m 2 More preferably, 13.5 g / m 2 The upper limit is more preferably 16.5 g / m 2 More preferably, 15.5 g / m or less 2 The following is the result. The basis weight of the tissue paper can be measured in accordance with JIS P 8124. The basis weight of the tissue paper is measured after it has been kept in equilibrium under the temperature and humidity conditions specified in JIS P 8111 (specifically, 23±1°C, 50±2% RH).

[0067] The thickness of the thin paper (e.g., tissue paper) that makes up the tissue paper laminate 11 is preferably 0.5 mm or more per 10 sheets and 1.1 mm or less per 10 sheets. If the thickness of the tissue paper is less than 0.5 mm per 10 sheets, the tissue paper will be thin and flimsy, and will easily wrinkle or fold. On the other hand, if the thickness of the tissue paper exceeds 1.1 mm per 10 sheets, the height of the tissue paper laminate 11 will be high and bulky, making it difficult to fold the gusset 12. If the tissue paper is two-ply tissue paper, five sets of two plies will correspond to 10 sheets.

[0068] Furthermore, the lower limit of the thickness of the thin paper (e.g., tissue paper) that constitutes the thin paper laminate 11 is more preferably 0.7 mm / 10 sheets or more, even more preferably 0.8 mm / 10 sheets or more, and the upper limit is more preferably 1.0 mm / 10 sheets or less, even more preferably 0.95 mm / 10 sheets or less. The thickness of tissue paper can be measured, for example, using a thickness gauge (a dial thickness gauge called "PEACOCK" manufactured by Ozaki Seisakusho Co., Ltd.). Specifically, the measurement conditions are a measurement load of 3.7 kPa and a probe diameter of 30 mm. A sample is placed between the probe and the measuring table, and the gauge is read when the probe is lowered at a speed of 1 mm per second or less. The measurement is repeated 10 times (note that measurements are not taken at the same location 10 times, but at 10 different locations), and the average of the measurement results is used as the final paper thickness. Furthermore, the thickness of tissue paper is measured after maintaining the sample in an equilibrium state under the temperature and humidity conditions specified in JIS P 8111 (specifically, 23±1°C, 50±2% RH).

[0069] The specific volume of the tissue paper (for example, per ply of tissue paper) constituting the tissue paper laminate 11 is 4.0 cm 3 / g or more 8.5cm 3 / g or less. 3 If the specific volume of the tissue paper is less than 8.5 cm / g, the tissue paper will be thin and flimsy, and will easily wrinkle or fold. 3If the tensile strength exceeds 1 / g, the height of the tissue paper laminate 11 becomes large and bulky, making it difficult to fold the gusset 12.

[0070] The specific volume of the thin paper (for example, per ply of tissue paper) constituting the thin paper laminate 11 is preferably 4.5 cm 3 or less. 3 / g or more, more preferably 5.2 cm 3 / g or more, and the upper limit is more preferably 7.5 cm 3 / g or less, more preferably 6.8 cm 3 The specific volume is calculated by dividing the thickness of the thin paper (for example, one ply of tissue paper) by the basis weight of the thin paper, and then calculating the volume cm per unit g. 3 This is expressed as:

[0071] The number of sets of tissue paper (e.g., two-ply tissue paper) constituting the tissue paper laminate 11 is between 150 and 250. If the number of sets of tissue paper is less than 150, the packaging base material 10 does not tightly fit the tissue paper laminate 11, and the tissue paper laminate 11 becomes unstable and shifts inside the packaging base material 10, making the tissue paper more likely to wrinkle or fold. On the other hand, if the number of sets of tissue paper exceeds 250, the height of the tissue paper laminate 11 becomes large and bulky, making it difficult to fold the gusset 12.

[0072] The number of sets of tissue paper (e.g., two-ply tissue paper) constituting the tissue paper laminate 11 is preferably 180 sets or more, more preferably 190 sets or more, and the upper limit is preferably 220 sets or less, more preferably 210 sets or less.

[0073] The method for folding and stacking the tissue paper is not limited to a specific procedure or method, but for example, a rotary interfolder (IF) or a multi-stand interfolder (MF) may be used.

[0074] As shown in Figure 7, the tissue papers that make up the tissue paper laminate 11 are preferably V-folded so that roughly half of the opposing tissue papers 14 that overlap each other vertically are sandwiched together in the CD direction when viewed from the side (MD direction, specifically, the direction in which the tissue paper laminate 11 is inserted) of the packaging body 1 (specifically, the packaging base material 10). This allows the tissue papers 14 that make up the tissue paper laminate 11 to be removed from the packaging body 1 (specifically, the packaging base material 10) in a pop-up manner. Note that the relationship between the V-fold direction of the tissue paper 14 constituting the tissue paper laminate 11 and the MD and CD directions in Figure 7 is merely an example, and the relationship between the V-fold direction of the tissue paper 14 and the MD and CD directions in the actual manufacturing process is not limited to the relationship in Figure 7 (specifically, for example, it differs depending on whether the method of stacking the tissue paper 14 is a rotary interfolder (IF) or a multi-stand interfolder (MF)).

[0075] The height of the tissue paper laminate 11 (e.g., a laminate of tissue paper) is 50 mm or more and 100 mm or less. If the height of the tissue paper laminate 11 is less than 50 mm, the packaging base material 10 will not tightly fit the tissue paper laminate 11, and the tissue paper laminate 11 will become unstable and shift inside the packaging base material 10, making the tissue more likely to wrinkle or fold. On the other hand, if the height of the tissue paper laminate 11 exceeds 100 mm, it will be difficult to fold the gusset 12.

[0076] The lower limit of the height of the tissue paper laminate 11 is preferably 60 mm or more, more preferably 65 mm or more, and the upper limit is preferably 85 mm or less, more preferably 75 mm or less. The height of the tissue paper laminate 11 is the dimension along the direction perpendicular to both the MD and CD directions (specifically, the vertical direction). This dimension may be calculated, for example, by measuring the dimensions b1 to b4 of each of the four vertical sides of the tissue paper laminate 11 shown in Figure 4 and taking the average of these dimensions.

[0077] The longitudinal dimension of the tissue paper laminate 11 (e.g., a tissue paper laminate) is preferably 110 mm or more and 180 mm or less. If the longitudinal dimension of the tissue paper laminate 11 is less than 110 mm, the packaging base 10 will not tightly fit the tissue paper laminate 11, and the tissue paper laminate 11 will become unstable and shift inside the packaging base 10, making the tissue more likely to wrinkle or fold. On the other hand, if the longitudinal dimension of the tissue paper laminate 11 exceeds 180 mm, it will be difficult to fold the gusset 12.

[0078] The lower limit of the longitudinal dimension of the tissue paper laminate 11 is more preferably 120 mm or more, and even more preferably 130 mm or more, and the upper limit is more preferably 170 mm or less, and even more preferably 160 mm or less. The longitudinal dimension of the tissue paper laminate 11 may be calculated, for example, by measuring the dimensions c1 to c4 of each of the four sides of the tissue paper laminate 11 shown in Figure 5, which correspond to the long sides of the rectangle when viewed along the vertical direction, and averaging these dimensions. The longitudinal dimension of the tissue paper laminate 11 is also referred to as the "longitudinal dimension D of the laminate." The longitudinal dimension of the tissue paper laminate 11 is the dimension of the tissue paper laminate 11 along the direction connecting the seal portions 13 of the packaging base material 10 (MD direction in the example shown in the figure).

[0079] Furthermore, the difference (i.e., CD) between the dimension between the sealed portions 13 of the packaging substrate 10 (i.e., the dimension C between the sealed portions) and the longitudinal dimension of the tissue paper laminate 11 (i.e., the longitudinal dimension D of the laminate) is 20 mm or more and 70 mm or less. If the difference (i.e., CD) between the dimension C between the sealed portions and the longitudinal dimension D of the laminate is less than 20 mm, the packaging substrate 10 will be too tight against the tissue paper laminate 11, making the tissue more likely to wrinkle or fold. On the other hand, if the difference (i.e., CD) between the dimension C between the sealed portions and the longitudinal dimension D of the laminate exceeds 70 mm, the packaging substrate 10 will not be tight enough against the tissue paper laminate 11, causing the tissue paper laminate 11 to become unstable and shift inside the packaging substrate 10, making the tissue more likely to wrinkle or fold.

[0080] Furthermore, the difference between the dimension between the seal portions 13 of the packaging base material 10 and the longitudinal dimension of the tissue paper laminate 11 (i.e., CD) is preferably 30 mm or more at the lower limit, more preferably 40 mm or more at the upper limit, and is preferably 65 mm or less, more preferably 55 mm or less at the upper limit.

[0081] The minimum width of the thin paper laminate 11 (e.g., a tissue paper laminate) is preferably 80 mm or more, more preferably 90 mm or more, and even more preferably 95 mm or more, and the maximum width is preferably 130 mm or less, more preferably 120 mm or less, and even more preferably 115 mm or less. If the width of the thin paper laminate 11 is less than 80 mm, the packaging substrate 10 will not tightly fit the thin paper laminate 11, and the thin paper laminate 11 will be unstable and shift inside the packaging substrate 10, making the tissue more likely to wrinkle or fold. On the other hand, if the width of the thin paper laminate 11 exceeds 130 mm, it will be difficult to fold the gusset 12.

[0082] The short-side dimension of the tissue paper laminate 11 may be calculated, for example, by measuring the dimensions e1 to e4 of each of the four sides corresponding to the short sides of the rectangle of the tissue paper laminate 11 in the vertical line of sight shown in Figure 6, and taking the average of these dimensions. The short-side dimension of the tissue paper laminate 11 is the dimension along the direction (CD direction in the example shown in the figure) perpendicular to the direction connecting the seal portions 13 of the packaging base material 10 of the tissue paper laminate 11 (MD direction in the example shown in the figure).

[0083] The bottom area of the thin paper laminate 11 (for example, a laminate of tissue paper) is preferably 13.0 cm 2 More than 13.5cm, preferably 2 More than 14.3cm, more preferably 2 The upper limit is preferably 17.5 cm. 2 Less than or equal to 17.0 cm, preferably 2 Less than 16.3cm, more preferably 2 The bottom area of the tissue paper laminate 11 is 13.0 cm 2If the thickness is less than 17.5 cm, the packaging substrate 10 will not be tight enough to fit the tissue paper laminate 11, and the tissue paper laminate 11 will not be stable inside the packaging substrate 10 and will shift, making the tissue more likely to wrinkle or fold. 2 If it exceeds this, it will be difficult to fold the gusset 12.

[0084] The base area of the tissue paper laminate 11 is the surface area of the tissue paper laminate 11 as viewed in a vertical direction, and is specifically calculated by multiplying the long side of the tissue paper laminate 11 by the short side of the tissue paper laminate 11. For example, when the tissue paper 14 is folded in a V shape to form the tissue paper laminate 11 (see Figure 7), the base area of the tissue paper laminate 11 is the surface area of the tissue paper 14 in a V-folded state as viewed in a vertical direction.

[0085] The weight of the tissue paper laminate 11 (e.g., a tissue paper laminate) is preferably 140 g or more, more preferably 160 g or more, and even more preferably 165 g or more, and preferably 220 g or less, more preferably 200 g or less, and even more preferably 190 g or less. If the weight of the tissue paper laminate 11 is less than 140 g, the packaging substrate 10 will not tightly fit the tissue paper laminate 11, causing the tissue paper laminate 11 to become unstable and shift inside the packaging substrate 10, making the tissue more prone to wrinkling and folding. On the other hand, if the weight of the tissue paper laminate 11 exceeds 220 g, the packaging substrate 10 will be too tightly fitted to the tissue paper laminate 11, making the tissue more prone to wrinkling and folding.

[0086] The density of the thin paper laminate 11 (for example, a tissue paper laminate) is 0.11 g / cm 3 More than 0.23g / cm 3 It is preferable that the density of the tissue paper laminate 11 is 0.11 g / cm or less. 3If the density of the tissue paper laminate 11 is less than 0.23 g / cm, the packaging substrate 10 will not be tight enough to fit the tissue paper laminate 11, and the tissue paper laminate 11 will be unstable and shift inside the packaging substrate 10, making the tissue paper more likely to wrinkle or fold. 3 If the thickness exceeds this value, the packaging substrate 10 will be too tight against the tissue paper laminate 11, making the tissue paper more likely to wrinkle or fold. The density of the tissue paper laminate 11 is preferably 0.13 g / cm 3 or less. 3 More preferably, 0.14 g / cm 3 The upper limit is more preferably 0.21 g / cm 3 More preferably, 0.20 g / cm or less 3 The following is the result.

[0087] The density of the tissue paper laminate 11 is calculated according to the following formula 2. The "weight" in the following formula 2 is the weight of the tissue paper laminate 11 in a state where the tissue papers are stacked, and the "volume" in the following formula 2 is calculated according to the following formula 3. (Equation 2) Density (g / cm 3 ) = weight (g) ÷ volume (cm 3 ) (Equation 3) Volume (cm 3 ) = Longitudinal dimension of the tissue paper laminate (cm) × Shortitudinal dimension of the tissue paper laminate (cm) × Height of the tissue paper laminate (cm) [Example]

[0088] Examples of the present invention will be described below. Note that the following examples are provided for illustrative purposes and are not intended to limit the scope of the present invention.

[0089] A tissue paper package was produced as an example of a specific structural embodiment of the package according to the present invention using components having the physical properties, dimensions, and specifications shown in Tables 1 to 4 below, and the following five items were evaluated as criteria, with criteria 1, 3, and 5 being scored on a scale of 1 to 5, and criteria 2 and 4 being scored on a scale of 1 to 4. Specifically, a particularly good or particularly excellent condition was given a score of 1, followed by scores of 2 and 3. Scores of 4 and 5 correspond to failures that do not meet the standards for a commercially available product.

[0090] 1. Packaging type The better the appearance of the packaging substrate, for example, the firmer the gusset fold lines are (in other words, the more pronounced the corners are), the higher the score is. Specifically, in this example, a sensory evaluation was conducted by 20 monitors, who selected "good" or "bad" for the shape of the packaging. Scoring was performed according to the following criteria: 1 point: 18 or more people answered "good" 2 points: 14 to 17 people answered "Good" 3 points: 10 to 13 people answered "good" 4 points: 7 to 9 people answered "good" 5 points: 6 or fewer people answered "good"

[0091] 2. Tightness of packaging The more adequate the strength of the packaging substrate to encase (and stably support) the tissue paper laminate, the higher the score. Specifically, in this example, a sensory evaluation was conducted by 20 monitors, who selected "good" or "bad" for the tightness of the packaging. The scores were then given according to the following criteria: 1 point: 18 or more people answered "good" 2 points: 14 to 17 people answered "Good" 3 points: 10 to 13 people answered "good" 4 points: 9 or fewer people answered "good"

[0092] 3. Ease of folding the gusset The easier it is to fold the gusset when sealing (specifically, heat sealing) the packaging substrate, the higher the score. Specifically, in this example, a sensory evaluation was conducted by 20 monitors, who selected "good" or "bad" for the ease of folding the gusset. The scores were then assigned according to the following criteria: 1 point: 18 or more people answered "good" 2 points: 14 to 17 people answered "Good" 3 points: 10 to 13 people answered "good" 4 points: 7 to 9 people answered "good" 5 points: 6 or fewer people answered "good"

[0093] 4. Heat sealability of packaging substrate The better the finish of the heat seal for sealing the packaging substrate, the higher the score. Note that depending on the degree of stiffness, the strength of the heat seal joint may be insufficient, or the packaging substrate may shrink or become distorted. Specifically, in this example, a sensory evaluation was conducted by 20 monitors, who selected "good" or "poor" for the heat sealability of the packaging substrate. Scoring was then performed according to the following criteria. 1 point: 18 or more people answered "good" 2 points: 14 to 17 people answered "Good" 3 points: 10 to 13 people answered "good" 4 points: 9 or fewer people answered "good"

[0094] 5. Wrinkles and folds in tissue paper The fewer wrinkles and folds there were in the tissue paper wrapped in the packaging base, the higher the score. Specifically, in this example, a sensory evaluation was conducted by 20 monitors, who selected "good" or "bad" for the wrinkles and folds in the tissue paper. The scores were then given according to the following criteria: 1 point: 18 or more people answered "good" 2 points: 14 to 17 people answered "Good" 3 points: 10 to 13 people answered "good" 4 points: 7 to 9 people answered "good" 5 points: 6 or fewer people answered "good"

[0095] (Packaged item) As the packaged items, several types of tissue paper (tissue paper not impregnated with lotion-based chemical solution) with different basis weights, paper thicknesses, and specific volumes were used to prepare two-ply tissue paper laminates. The measurement and calculation results of the basis weight (per ply), paper thickness, and specific volume of each of the several types of tissue paper (in other words, of each tissue paper in the Examples and Comparative Examples) are shown in Tables 1 to 4.

[0096] (Packaging base material) As the packaging substrate, several types of film substrates (specifically, tubular films) with different basis weights and thicknesses were used. The measurement results of the thickness, basis weight, and bending resistance in the MD direction of each of the several types of film substrates (in other words, each of the film substrates of the Examples and Comparative Examples) are shown in Tables 1 to 4.

[0097] For each of Examples 1 to 17 and Comparative Examples 1 to 9, the physical properties, specifications, and dimensions of the tissue paper constituting the packaged items, the physical properties, specifications, and dimensions of the tubular film serving as the packaging substrate, the specifications and dimensions of the package, and the evaluation results are shown in Tables 1 to 4.

[0098] [Table 1]

[0099] [Table 2]

[0100] [Table 3]

[0101] [Table 4]

[0102] From the results shown in Tables 1 to 4, it was confirmed that none of the packages of Examples 1 to 17 received a score of 4 or 5 (i.e., failure) in any of the five evaluation criteria, and were good and excellent in terms of the shape of the package, the tightness of the package, the ease of folding the gusset, the heat-sealing properties of the package base material, and the wrinkles and folds in the tissue paper.

[0103] In contrast, it was confirmed that all of the packages of Comparative Examples 1 to 9 received at least one item that was rated 4 or 5 points (ie, failed) for each of the five evaluation criteria.

[0104] From the results shown in Tables 1 to 4, it was confirmed that by using packages such as those of Examples 1 to 17, particularly good packages according to the present invention can be obtained.

[0105] Therefore, it has been confirmed that the packaging of the present invention can provide a packaging that has excellent shape, is easy to fold into a gusset, and is less likely to cause the tissue paper inside to wrinkle or fold, even when made of light and soft tissue paper.

[0106] The above describes the embodiments of the present invention, but the specific configuration of the present invention is not limited to the above embodiments, and the present invention also includes forms in which modifications and changes are made to the above embodiments within the scope of the gist of the present invention. [Explanation of symbols]

[0107] 1 package 10 Packaging base material 11 Tissue paper laminate (laminate) 12. The Gazette 13 Seal part 14 Tissue Paper 16 Insertion port

Claims

1. A packaging body that covers the packaged item with a packaging base material, The packaging substrate is a tubular film, The packaged item is a laminate of tissue paper that is not impregnated with a lotion-based medicinal solution, The number of sets of the thin paper constituting the laminate is 150 sets or more and 250 sets or less, The laminate is gusset-wrapped with the tubular film, The bending resistance in the MD direction of the tubular film is 2 mN / 10 sheets or more and 25 mN / 10 sheets or less, The height of the laminate is 50 mm or more and 100 mm or less, The density of the laminate is 0.11 g / cm ３ 0.23g / cm or more ３ is as follows: a seal portion is formed at each of both end portions in the MD direction of the tubular film; A package characterized in that the difference between the dimension between the sealed portions and the longitudinal dimension of the laminate is 20 mm or more and 70 mm or less.

2. 2. The package according to claim 1, wherein the gusset in the gusset packaging has a folded width of 15 mm or more and 55 mm or less.

3. 2. The package according to claim 1, wherein the longitudinal dimension of the laminate is 110 mm or more and 180 mm or less.

4. 2. The package according to claim 1, wherein the dimension between the sealed portions is 130 mm or more and 225 mm or less.

5. The tubular film has a basis weight of 32 g / m ２ 90g / m or more ２ 2. The package of claim 1, wherein:

6. 2. The package according to claim 1, wherein the thickness of the tubular film is 35 μm or more and 100 μm or less.

7. The basis weight of one ply of the tissue paper is 9.5 g / m ２ 17.5g / m or more ２ 2. The package of claim 1, wherein:

8. The packaging body according to claim 1, characterized in that the thickness of the thin paper is 0.5 mm / 10 sheets or more and 1.1 mm / 10 sheets or less.

9. The specific volume of the tissue paper is 4.0 cm ３ / g or more 8.5cm ３ The package according to claim 1, characterized in that the surface roughness is 1 / g or less.

10. 2. The package of claim 1, wherein the tissue paper is V-folded.

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