Package for paper product

Abstract

To provide a package for paper products that can improve paper product packaging operability and maintain aesthetic quality of the paper products.SOLUTION: According to the present disclosure, there is provided a package 1 for paper products in which a paper product 10 is entirely covered with a packaging base material 20. The paper product 10 is a laminate of multiple tissue paper sheets that have been lotion-treated and contain a medicinal solution. The number of sets of tissue paper sheets included in the laminate is 160 sets or more and 320 sets or less. The packaging base material 20 includes at least a film base material. The packaging format using the packaging base material 20 is a gusset package sealed on both sides in a predetermined direction intersecting the stacking direction of the laminate. The thickness of the packaging base material 20 is 22 μm or more and 122 μm or less. The dynamic friction coefficient between the inner surface of the packaging base material 20 and the laminate is 0.10 or more and 0.20 or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to packages for paper products. [Background technology]

[0002] 2. Description of the Related Art Conventionally, packages that house, as packaged items, roll-shaped paper products such as toilet paper and kitchen paper, and layered paper products such as tissue paper and wipers, have been known.

[0003] For example, soft packs containing layered tissue paper as packaging items are sold, which are convenient to carry around. Among them, high-grade lotion tissues are sold in caramel packaging, which is convenient to carry around.

[0004] Caramel packaging has a good shape (appearance) of the package, but on the other hand, packaging is difficult. Specifically, in caramel packaging, if the height of the laminate of thin paper such as tissue paper is not relatively constant, the heat seal during packaging is not stable. Therefore, since the height of the laminate differs between the upper and lower rolls of the original roll, it is often easy for defective products to be produced during packaging depending on the original roll.

[0005] Pillow packaging is easy to package, but the shape of the package is poor. When a tubular film is used, the shape of the package is good. However, when the laminate is inserted into the tubular film, the upper or lower part of the laminate may come into contact with the film, causing a part of the laminate to turn over, resulting in a defective product.

[0006] Patent Document 1 discloses a film packaging body in which sanitary paper folded in a pop-up style is gusset-packaged in a packaging bag. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2016-188092 A Summary of the Invention [Problem to be solved by the invention]

[0008] When a paper product, particularly a paper product (laminate) such as laminated tissue paper, is packaged as a product, as in the film packaging (packaging for paper products) described in Patent Document 1, friction occurs between the film and the sheets of the laminate during operation, making it difficult to insert the laminate into the packaging, resulting in poor operability. If the clip height is high, it becomes even more difficult to insert. In addition, friction occurs, causing a part of the laminate to bend and wrinkle, resulting in poor cosmetic appearance. Conversely, if there is no friction and it slides too much, the laminate moves unstably in the film, causing a part of the laminate to bend and wrinkle, resulting in poor cosmetic appearance. Furthermore, if the film thickness is too thick, it becomes difficult to bend the film at the appropriate position, making packaging difficult. Conversely, if the film thickness is too thin, the films at the insertion opening through which the laminate is inserted will stick to each other, making it difficult to open the insertion opening, making it difficult to insert the laminate, resulting in poor operability.

[0009] Therefore, an object of the present disclosure is to provide a packaging body for paper products that can improve operability when packaging paper products and maintain the aesthetic appeal of the paper products. [Means for solving the problem]

[0010] In order to solve the above problems, a first aspect of the present invention is a packaging body for paper products in which the entire paper product is covered with a packaging base material, the paper product is a laminate of multiple tissue papers that have been lotion-treated and contain a medicinal solution, the number of sets of tissue papers included in the laminate is 160 sets or more and 320 sets or less, the packaging base material includes at least a film base material, the packaging format using the packaging base material is a gusset package sealed on both sides in a predetermined direction intersecting the stacking direction of the laminate, the thickness of the packaging base material is 22 μm or more and 122 μm or less, and the dynamic friction coefficient between the inner surface of the packaging base material and the laminate is 0.10 or more and 0.20 or less.

[0011] A second aspect of the present invention is the packaging body for paper products of the first aspect, wherein the basis weight of the packaging base material is 20 g / m 2 More than 110g / m 2 The following is the result.

[0012] A third aspect of the present invention is a packaging body for paper products of the first aspect or the second aspect, wherein the static friction coefficient between the inner surface of the packaging base material and the laminate is 0.14 or more and 0.24 or less.

[0013] A fourth aspect of the present invention is a packaging body for paper products of the first aspect or the second aspect, wherein the film substrate of the packaging substrate has a multilayer structure having a layer of milky polyethylene as the innermost layer in contact with the laminate.

[0014] A fifth aspect of the present invention is a packaging body for paper products of the first aspect or the second aspect, wherein the value expressed by the formula (perimeter A / perimeter B)×100(%), where the length of the outer perimeter of the packaging base material with the predetermined direction as its axis is circumference A and the length of the outer perimeter of the laminate with the predetermined direction as its axis is circumference B, is 101% or more and 113% or less.

[0015] A sixth aspect of the present invention is a packaging body for paper products according to the first or second aspect, wherein the thickness of the tissue paper per 10 plies is 0.50 mm / 10 plies or more and 0.90 mm / 10 plies or less.

[0016] A seventh aspect of the present invention is a packaging body for paper products according to the first aspect or the second aspect, wherein the basis weight per ply of the tissue paper is 12 g / m 2 More than 20g / m 2 The following is the result.

[0017] An eighth aspect of the present invention is the packaging body for paper products of the first aspect or the second aspect, wherein the height of the laminate in the stacking direction is 40 mm or more and 180 mm or less.

[0018] A ninth aspect of the present invention is a packaging body for paper products according to the first aspect or the second aspect, wherein the content of the chemical solution in the tissue paper is 10% by mass or more and 22% by mass or less.

[0019] A tenth aspect of the present invention is a packaging body for paper products according to the first aspect or the second aspect, wherein the content of the chemical solution per ply of the tissue paper is 1.8 g / m 2 More than 3.2g / m 2 The following is the result. Effect of the Invention

[0020] According to the present disclosure, it is possible to provide a packaging body for paper products that can improve the operability when packaging paper products and maintain the aesthetic quality of the paper products. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a perspective view of a packaging body for paper products according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic perspective view of a laminate; [Diagram 3] FIG. 2 is a perspective view showing an example of gusset packaging in a packaging body for paper products. [Figure 4] FIG. 2 is a schematic diagram of a measuring device for measuring the coefficient of friction between the packaging substrate and the laminate in the packaging body for paper products of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each drawing, the X direction indicates the longitudinal direction (predetermined direction) of the packaging body for paper products. The Y direction is a direction intersecting with the X direction and indicates the short side direction (sometimes called the "width direction") of the packaging body for paper products. The Z direction is a direction intersecting with both the X direction and the Y direction and indicates the thickness direction (stacking direction of the laminate) of the packaging body for paper products. Furthermore, operation means work during the manufacture of a product.

[0023] <Packaging for paper products> FIG. 1 is a perspective view of a packaging body for paper products according to one embodiment of the present invention.

[0024] As shown in Fig. 1, the paper product packaging 1 according to this embodiment has a paper product 10 entirely covered with a packaging base material 20. The packaging format of the paper product 10 with the packaging base material 20 is a gusset packaging in which both sides of the longitudinal direction (X direction) of the paper product packaging 1 are sealed along the width direction (Y direction). That is, both sides of the longitudinal direction of the paper product packaging 1 are sealed by a seal portion 4 extending along the width direction. When sealing with the seal portion 4, it is preferable to seal by heat sealing.

[0025] The paper product packaging 1 has four substantially parallel mountain folds 2 extending in the longitudinal direction, and two valley folds 3 extending in the longitudinal direction substantially parallel to the mountain folds 2. The mountain folds 2 form corners between both side surfaces (top surface 1a, bottom surface 1b) in the thickness direction (Z direction) of the paper product packaging 1 and both side surfaces (side surfaces 1c, 1d) in the width direction. The valley folds 3 are provided at a height position at the substantially center in the thickness direction of both side surfaces 1c, 1d in the width direction of the paper product packaging 1, and extend in the longitudinal direction between the ends of the seal portions 4 on both sides in the longitudinal direction. It is preferable that the mountain folds 2 and the valley folds 3 are provided with lines and creases are made along the lines.

[0026] Furthermore, the paper product packaging 1 preferably includes a removal opening (not shown) through which the paper product 10 can be removed. This removal opening is preferably provided on one surface in the thickness direction of the packaging base material 20 (e.g., the top surface 1a). For example, the removal opening may be formed by providing a cut line such as a perforation on the packaging base material 20 and cutting along the cut line when in use.

[0027] <Packaging base material> The packaging substrate 20 includes at least a film substrate. The packaging substrate 20 preferably does not include paper, and preferably has printing on it. The packaging substrate 20 preferably includes 90% by weight or more of a film substrate, and more preferably includes 95% by weight or more of a film substrate. The packaging substrate 20 is preferably a tube type (i.e., when the packaging substrate 20 includes only a film substrate, it is a tube type film). A tube type film is a film formed into a cylindrical shape.

[0028] (Film substrate) The film constituting the film substrate may be formed as a single layer or as a multi-layer. The material of the film is not particularly limited and may be any plastic (thermoplastic resin) film used when packaging ordinary paper products, and may be surface-treated. From the viewpoint of aesthetics and slip resistance, a matte film is preferable. Examples of the material of the plastic film include conventionally known thermoplastic resins such as polyolefin (polyethylene, polypropylene, etc.), polyester (PET, etc.), polyamide (nylon, etc.), polycarbonate, polystyrene, polyvinyl chloride, etc., and preferably polyethylene.

[0029] Specifically, when the film substrate is formed of a single layer, the film material is preferably any one selected from textured polyethylene, milky polyethylene, linear low-density polyethylene, and non-oriented polypropylene. When the film substrate is formed of multiple layers, the film material in the outermost layer and / or the innermost layer of the film substrate is preferably any one selected from textured polyethylene, milky polyethylene, linear low-density polyethylene, and non-oriented polypropylene.

[0030] Among these, the packaging base material 20 preferably has a multi-layer structure, and preferably has a milky polyethylene film-based layer as the innermost layer in contact with the paper product 10 (laminate 12 described below). When the innermost layer in contact with the paper product 10 is a milky polyethylene layer, friction with the paper product 10 is reduced, making it easier to insert the paper product 10 into the packaging base material 20 during operation.

[0031] For example, the packaging substrate 20 is formed of a three-layer film substrate, and preferably has a textured polyethylene layer as the outermost layer, a polyethylene layer (laminate) as the middle layer, and a milky polyethylene layer as the innermost layer. If the outermost layer is a textured polyethylene layer, the paper product 10 can be held firmly without slipping, making it easier to remove (use). Also, if the middle layer is a polyethylene layer (laminate), operability improves.

[0032] The method for matt-finishing the film substrate is not particularly limited, and conventionally known methods can be used, such as a method of pressing the surface of the film substrate against an embossing roll or a matte roll during molding of the film substrate to impart irregularities, or a method of imparting irregularities by sandblasting. These methods may be used during molding of a tubular film, but it is preferable to perform the method on a single layer of polyethylene to obtain a matt-finished polyethylene film, which is then laminated with an innermost milky polyethylene film or the like. Alternatively, for example, a method of using a polymer blend or a method of biaxially stretching a laminate of a polyolefin resin blend can be used without performing surface treatment as described above.

[0033] In addition, the tubular film is preferably made into a multi-layer film by extrusion laminating the outermost matte film and the innermost milky film with polyethylene.

[0034] Furthermore, by specifying the ash content of the packaging substrate 20, it is possible to obtain a paper product package 1 (e.g., a lotion tissue paper package) that has good tightness and in which the thin paper (e.g., lotion tissue paper) is not easily turned over during packaging. In the paper product package 1, the ash content of the packaging substrate 20 is preferably 1.5% or more and 12% or less. In addition, although the ash content of the packaging substrate 20 is not limited to a specific value, the lower limit 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.

[0035] 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 is calculated by the following formula (1), and in the explanation of the present invention, the absolute dry mass of the test piece in the following formula is regarded as the mass of the test piece of the packaging substrate 20 when it is conditioned at 23°C and 50% humidity. Ash content (%) = mass of residue (g) ÷ bone dry mass of test piece (g) × 100 (1) If the ash content of the packaging substrate 20 is less than 1.5%, the tube bag is difficult to open when inserting the paper product 10 into the packaging substrate 20 (hereinafter sometimes referred to as "bagging"), and bagging frequently fails. On the other hand, if the ash content of the packaging substrate 20 exceeds 12%, the stiffness of the packaging substrate 20 weakens as the ash content increases, making it difficult to open the tube bag during bagging, and bagging frequently fails.

[0036] The packaging substrate 20 may also include other layers in addition to the film substrate, such as a water vapor barrier layer, an oxygen barrier layer, a print layer, a printability improving layer, an overprint layer, and a light-shielding layer.

[0037] (Basis weight of packaging material) The basis weight of the packaging substrate 20 (when only a film substrate is included, the basis weight of the film substrate) is 20 g / m 2 More than 110g / m 2The basis weight of the packaging substrate 20 is preferably 20 g / m or less. 2 If the basis weight of the packaging substrate 20 is lower than 110 g / m, the packaging substrate 20 will stick together during operation, making it difficult to open the insertion opening 21 for inserting the paper product 10 at one end of the longitudinal direction of the packaging substrate 20, which may reduce operability. 2 If it is higher than this, the packaging substrate 20 becomes too thick, which may make it difficult to fold and reduce workability. The basis weight of the packaging substrate 20 can be measured in accordance with JIS P 8124. The lower limit of the above-mentioned range of the basis weight of the packaging substrate 20 is 50 g / m 2 More preferably, it is 60 g / m or more. 2 The upper limit of the above range of the basis weight of the packaging substrate 20 is 80 g / m 2 More preferably, it is 70 g / m or less. 2 It is more preferable that the basis weight of the packaging substrate 20 is equal to or less than 1000 g / m2. When the packaging substrate 20 is printed, the basis weight of the packaging substrate 20 includes the printing ink.

[0038] (Thickness of packaging material) The thickness of the packaging substrate 20 is 22 μm or more and 122 μm or less. If the thickness of the packaging substrate 20 is thinner than 22 μm, the packaging substrates 20 may stick together during operation, and the insertion opening 21 for inserting the paper product 10 at one end of the longitudinal direction of the packaging substrate 20 may become difficult to open, which may reduce operability. On the other hand, if the thickness of the packaging substrate 20 is thicker than 122 μm, the packaging substrate 20 may become too thick and difficult to bend, which may reduce operability. The thickness of the packaging substrate 20 can be measured in accordance with JIS K 7130. The lower limit of the above range of the thickness of the packaging substrate 20 is preferably 55 μm or more, and more preferably 67 μm or more. The upper limit of the above range of the thickness of the packaging substrate 20 is preferably 89 μm or less, and more preferably 78 μm or less.

[0039] (Circumference of packaging material) When the length of the outer periphery (length in the circumferential direction) of the packaging substrate 20 along its axis (the longitudinal direction (X direction)) is taken as the periphery A, the periphery A is preferably 340 mm or more and 420 mm or less. By setting the periphery A of the packaging substrate 20 within the above range, the laminate 12 can be easily inserted into the packaging substrate 20, and the operability is excellent. The length of the outer periphery along the longitudinal direction of the packaging substrate 20 is the sum of the length of the packaging substrate 20 in the width direction (Y direction) of the top surface 1a of the paper product package 1, the length of the packaging substrate 20 in the width direction (Y direction) of the bottom surface 1b, and the length of the packaging substrate 20 in the thickness direction (Z direction) of the packaging substrate 20 on both sides 1c and 1d in the width direction. The lower limit of the above range of the periphery A of the packaging substrate 20 is more preferably 355 mm or more, and even more preferably 350 mm or more. The upper limit of the above range of the periphery A of the packaging substrate 20 is more preferably 405 mm or less, and even more preferably 395 mm or less.

[0040] The perimeter A of the packaging substrate 20 is measured by cutting the packaging substrate 20 of the paper product package 1 along the outer periphery with the longitudinal axis as the axis, and measuring the circumferential length of the cut-out portion with a ruler. The location for measuring the perimeter A of the packaging substrate 20 is preferably the central portion in the longitudinal direction of the paper product package 1. In addition, if the part of the packaging substrate 20 cut along the periphery includes a sealed portion, the length of the sealed portion is not included in the perimeter A of the packaging substrate 20.

[0041] <Paper products> FIG. 2 is a schematic perspective view of a laminate.

[0042] The paper product 10 is a laminate 12 made by stacking multiple pieces of tissue paper 11 that have been lotion-treated and contain a medicinal liquid. The tissue paper 11 of this embodiment is a set of two plies of lotion tissue that has been lotion-treated and contains a medicinal liquid. In other words, the paper product 10 of this embodiment is a laminate 12 made by stacking a set of two plies of lotion tissue. Hereinafter, the paper product 10 may be referred to as the laminate 12.

[0043] The thin paper 11 (lotion tissue) contains a medicinal liquid. The medicinal liquid contains an aqueous component and an oily component, and preferably further contains water. In another embodiment, the medicinal liquid may contain only one of the aqueous component and the oily component.

[0044] (aqueous component) Examples of the aqueous component include polyhydric alcohols (alcohols having divalent or higher hydroxyl groups). More specifically, examples include glycerin, diglycerin, ethylene glycol, propylene glycol, 1,3-butylene glycol, polyglycerin, polyethylene glycol, polypropylene glycol, sorbitol, xylitol, erythritol, etc. The above polyhydric alcohols may be blended in one type or in two or more types.

[0045] (Oily ingredients) Examples of oily components include various silicone oils, liquid paraffin, mineral oil, wax, etc. These components may be blended alone or in combination of two or more.

[0046] The lotion preferably contains glycerin and silicone, and more preferably, the silicone is amino-modified silicone. When the lotion contains the above-mentioned compound, the tissue paper 11 becomes smooth, and the laminate 12 is less likely to turn over during packaging.

[0047] (Chemical solution content (lotion content)) The content of the chemical solution in the thin paper 11 is preferably 10% by mass or more and 22% by mass or less. If the content of the chemical solution in the thin paper 11 is lower than 10% by mass, the thin paper 11 becomes less slippery, and when the laminate 12 is inserted into the packaging base material 20, the thin paper 11 is likely to bend and wrinkle. On the other hand, if the content of the chemical solution in the thin paper 11 is higher than 22% by mass, the thin paper 11 becomes more slippery, and the laminate 12 moves unstably in the paper product packaging body 1, and there is a possibility that a part of the laminate 12 may bend, and there is a risk of wrinkles, etc., resulting in a decrease in aesthetic value. The lower limit of the above range of the content of the chemical solution in the thin paper 11 is more preferably 12% by mass or more, and more preferably 14% by mass or more. The upper limit of the above range of the content of the chemical solution in the thin paper 11 is more preferably 19% by mass or less, and more preferably 17% by mass or less.

[0048] The content of the chemical solution contained in one ply of the thin paper 11 (hereinafter sometimes referred to as the "chemical solution content per one ply") is 1.8 g / m 2 More than 3.2g / m 2 The chemical content per ply is preferably 1.8 g / m or less. 2 If the chemical content per ply is lower than 3.2 g / m, the thin paper 11 becomes difficult to slide, and the thin paper 11 is likely to bend and wrinkle when the laminate 12 is inserted into the packaging base material 20. 2 If the thickness is higher than 1.0 g / m, the tissue paper 11 becomes slippery, and the laminate 12 becomes unstable and moves within the paper product package 1, which may cause a portion of the laminate 12 to bend, resulting in wrinkles and a decrease in aesthetic appeal. 2 More preferably, it is 2.4 g / m or more. 2 The upper limit of the above range of the content of the chemical solution per ply is preferably 3.0 g / m or more. 2 More preferably, it is 2.7 g / m or less. 2 It is even more preferable that:

[0049] The content of the chemical solution can be determined by the following measurement method. 5 g of tissue paper 11 (lotion tissue) is collected, dried in a dryer (105°C) for 120 minutes, then cooled in a desiccator for 30 minutes, and the mass is measured. The measured mass at this time is defined as m1. Next, Soxhlet extraction is performed for 4 hours using the tissue paper 11 whose mass has been measured and 150 ml of an extraction solvent (acetone:ethanol = 1:1). The obtained extract is heated and concentrated in a hot water bath, dried in a dryer (105°C) for 90 minutes, and then cooled in a desiccator for 30 minutes, and the mass is measured. The measured mass at this time is defined as m2. Then, using the two measured masses m1 and m2, m2 / m1 x 100 (%) is defined as the content of the chemical solution in the tissue paper 11 (mass %). Also, basis weight per ply x lotion content = chemical solution content per ply (g / m 2 )

[0050] (Number of pairs) The number of sets of tissue paper 11 constituting the laminate 12 is 160 sets or more and 320 sets or less. If the number of sets of tissue paper 11 is less than 160 sets, the space between the laminate 12 and the packaging base material 20 becomes too wide, and the laminate 12 may move in the paper product package 1 and bend a part of the laminate 12, which may cause wrinkles and reduce the aesthetic appearance. On the other hand, if the number of sets of tissue paper 11 is more than 320 sets, the height of the laminate 12 in the stacking direction (hereinafter simply referred to as the "height of the laminate 12") becomes too high, making it difficult to insert the laminate 12 into the packaging base material 20 during product manufacturing, and reducing operability. In addition, when the laminate 12 is inserted into the packaging base material 20, the laminate 12 is likely to wrinkle. The lower limit of the above range of the number of sets of tissue paper 11 is preferably 200 sets or more, and more preferably 220 sets or more. Moreover, the upper limit of the above range of the number of sets of the thin paper 11 is preferably 300 sets or less, and more preferably 260 sets or less.

[0051] (Basic weight) The basis weight per ply of the thin paper 11 (hereinafter simply referred to as the "basis weight of the thin paper 11") is 12 g / m 2 More than 20g / m 2 The basis weight of the thin paper 11 is preferably 12 g / m or less.2 If the basis weight of the thin paper 11 is less than 20 g / m, the height of the laminate 12 will be too low, and the space between the laminate 12 and the packaging base material 20 will be too wide, which may cause the laminate 12 to move within the paper product package 1 and cause a part of the laminate 12 to bend, resulting in wrinkles and a decrease in aesthetic appeal. 2 If it is higher than this, the height of the laminate 12 becomes too high, making it difficult to insert the laminate 12 into the packaging substrate 20 during product manufacturing, and reducing operability. In addition, the laminate 12 is prone to wrinkles when inserted into the packaging substrate 20. The basis weight of the thin paper 11 can be measured based on JIS P 8124. The lower limit of the above range of the basis weight of the thin paper 11 is 14 g / m 2 More preferably, it is 16 g / m or more. 2 The upper limit of the above range of the basis weight of the thin paper 11 is 19 g / m 2 More preferably, it is 18 g / m or less. 2 It is even more preferable that:

[0052] (paper thickness) The thickness of the thin paper 11 per 10 plies (hereinafter simply referred to as the "thickness of the thin paper 11") is preferably 0.50 mm / 10 plies or more and 0.90 mm / 10 plies or less. If the thickness of the thin paper 11 is less than 0.50 mm / 10 plies, the height of the laminate 12 is reduced, and the space between the laminate 12 and the packaging base material 20 is too wide, so that the laminate 12 may move within the paper product packaging body 1 and bend a part of the laminate 12, which may cause wrinkles and reduce the aesthetic appeal. On the other hand, if the thickness of the thin paper 11 is greater than 0.90 mm / 10 plies, the height of the laminate 12 becomes too high, making it difficult to insert the laminate 12 into the packaging base material 20 during product manufacturing, and reducing operability. In addition, the laminate 12 is prone to wrinkles when inserted into the packaging base material 20. The lower limit of the above range of the paper thickness of the thin paper 11 is more preferably 0.55 mm / 10 plies or more, and even more preferably 0.60 mm / 10 plies or more. The upper limit of the above range of the paper thickness of the thin paper 11 is more preferably 0.82 mm / 10 plies or less, and even more preferably 0.75 mm / 10 plies or less.

[0053] The thickness of the tissue paper 11 is measured with a Peacock paper thickness gauge under the conditions of JIS P 8111 (1998) (23±1°C, 50±2% relative humidity) using a thickness gauge (for example, an upright dial thickness gauge "PEACOCK R1-B type" manufactured by Ozaki Manufacturing Co., Ltd.) by applying a pressure of 3.7 kPa to a 30 mm diameter gauge. A sample is placed between the gauge and the measurement table, and the gauge is read when the gauge is lowered at a speed of 1 mm or less per second. If the lotion tissue is two-ply, five sets of two-ply lotion tissues are stacked and measured as 10 sheets, and the thickness of the 10 sheets is calculated. The measurement is also repeated 10 times (measure 10 different places instead of measuring the same place 10 times), and the measurement results are averaged to obtain the final paper thickness.

[0054] (specific volume) The specific volume of tissue paper 11 is 3.0 cm 3 / g or more 5.7cm 3The specific volume of the tissue paper 11 is preferably 3.0 cm 3 If the specific volume of the tissue paper 11 is lower than 5.7 cm3 / g, the tightness of the packaging is reduced and the sheet is easily bent and wrinkled. 3 If the thickness is higher than 1 / g, the thin paper 11 becomes loose and the sheet becomes easily bent. The specific volume of the thin paper 11 is calculated by dividing the paper thickness per two plies of the thin paper 11 by the basis weight per two plies, and is calculated as the volume per unit weight (cm 3 The lower limit of the above range of the specific volume of the tissue paper 11 is 3.3 cm3 / g. 3 / g or more is more preferable, and 3.6 cm 3 The upper limit of the above range of the specific volume of the thin paper 11 is preferably 5.2 cm3 / g or more. 3 / g or less is more preferable, and 4.5 cm 3 It is more preferable that the molecular weight is not more than 1 / g.

[0055] (Stack height) The height of the laminate 12 is preferably 40 mm or more and 180 mm or less. If the height of the laminate 12 is lower than 40 mm, the space between the laminate 12 and the packaging substrate 20 becomes too wide, and the laminate 12 may move in the paper product package 1 and bend a part of the laminate 12, which may cause wrinkles and reduce the aesthetic appeal. On the other hand, if the height of the laminate 12 is higher than 180 mm, it becomes difficult to insert the laminate 12 into the packaging substrate 20 during product production, which reduces operability. In addition, the laminate 12 is likely to wrinkle when inserted into the packaging substrate 20. The lower limit of the above range of the height of the laminate 12 is more preferably 50 mm or more, and more preferably 60 mm or more. In addition, the upper limit of the above range of the height of the laminate 12 is more preferably 110 mm or less, and more preferably 80 mm or less.

[0056] (Perimeter of laminate) When the length of the periphery (length in the circumferential direction) of the laminate 12 with the longitudinal direction (X direction) as the axis is defined as the periphery B, the periphery B is preferably 300 mm or more and 410 mm or less. By setting the periphery B of the laminate 12 within the above range, the laminate 12 can be easily inserted into the packaging base material 20, and the operability is excellent. The periphery length with the longitudinal direction of the laminate 12 as the axis is the sum of the length of the top surface 12a of the laminate 12 in the width direction (Y direction), the length of the bottom surface 12b in the width direction (Y direction), and the length of the side surfaces 12c and 12d on both sides in the width direction in the thickness direction (Z direction). The lower limit of the above range of the periphery B of the laminate 12 is more preferably 310 mm or more, and even more preferably 332 mm or more. The upper limit of the above range of the periphery B of the laminate 12 is more preferably 390 mm or less, and even more preferably 375 mm or less.

[0057] (Ratio of the perimeter of the packaging base material to the perimeter of the laminate) The ratio of the perimeter A of the packaging base material 20 to the perimeter B of the laminate 12 is a value C represented by the following formula (2), and is preferably 101% or more and 113% or less. Formula: C=(Perimeter A / Perimeter B)×100(%)...(2) If the value C is lower than 101%, the size of the packaging substrate 20 becomes too small, making it difficult to insert the laminate 12 into the packaging substrate 20 during production, reducing operability, and the tissue paper 11 of the laminate 12 is prone to wrinkles, resulting in reduced aesthetics. On the other hand, if the value C is higher than 113%, the size of the packaging substrate 20 becomes too large, making the laminate 12 unstable within the packaging substrate 20 and potentially moving within the paper product package 1 and causing a portion of the laminate 12 to bend, resulting in wrinkles and other problems that may result in reduced aesthetics. The lower limit of the range of the value C is more preferably 103% or more, and even more preferably 105% or more. The upper limit of the range of the value C is more preferably 110% or less, and even more preferably 108% or less.

[0058] (Kinematic friction coefficient) The dynamic friction coefficient between the inner surface of the packaging base material 20 and the laminate 12 (hereinafter sometimes simply referred to as the "dynamic friction coefficient") is 0.10 or more and 0.20 or less. The dynamic friction coefficient between the inner surface of the packaging base material 20 and the laminate 12 is the dynamic friction coefficient between the surface of the packaging base material 20 facing the laminate 12 and the surface of the thin paper 11 constituting the top surface 12a (or bottom surface 12b) of the laminate 12. If the dynamic friction coefficient is lower than 0.10, the friction is too small and the laminate 12 is not stable in the packaging base material 20, and it is possible that the laminate 12 moves in the paper product package 1 and a part of the laminate 12 is bent, which may cause wrinkles and reduce the aesthetic appearance. On the other hand, if the dynamic friction coefficient is higher than 0.20, the friction is too large and it is difficult to insert the laminate 12 into the packaging base material 20 during production, which reduces operability and the thin paper 11 of the laminate 12 is easily bent and wrinkled, which reduces the aesthetic appearance. The lower limit of the above range of the dynamic friction coefficient is preferably 0.12 or more, and more preferably 0.14 or more, and the upper limit of the above range of the dynamic friction coefficient is preferably 0.17 or less, and more preferably 0.16 or less.

[0059] (Static friction coefficient) The static friction coefficient between the inner surface of the packaging base material 20 and the laminate 12 (hereinafter sometimes simply referred to as the "static friction coefficient") is preferably 0.14 or more and 0.24 or less. The static friction coefficient between the inner surface of the packaging base material 20 and the laminate 12 is the static friction coefficient between the surface of the packaging base material 20 facing the laminate 12 and the surface of the thin paper 11 constituting the top surface 12a (or bottom surface 12b) of the laminate 12. If the static friction coefficient is lower than 0.14, the friction is too small, so that the laminate 12 is not stable in the packaging base material 20, and it is possible that the laminate 12 moves in the paper product package 1 and a part of the laminate 12 is bent, which may cause wrinkles and reduce the aesthetic appearance. On the other hand, if the static friction coefficient is higher than 0.24, the friction is too large, so that it is difficult to insert the laminate 12 into the packaging base material 20 during production, which reduces operability and the thin paper 11 of the laminate 12 is easily bent and wrinkled, which reduces the aesthetic appearance. The lower limit of the above range of the static friction coefficient is more preferably 0.16 or more, and even more preferably 0.18 or more, and the upper limit of the above range of the static friction coefficient is more preferably 0.21 or less, and even more preferably 0.20 or less.

[0060] Both the dynamic friction coefficient and the static friction coefficient can be measured using an "Automatic Friction Tester NSF-100" manufactured by Nomura Shoji Co., Ltd. in accordance with ISO 15359. In ISO 15359, the dynamic friction coefficient and the static friction coefficient are measured three times using the same sample, and the third value is adopted for the dynamic friction coefficient, and the first and third values ​​are adopted for the static friction coefficient. In the present invention, the first value is adopted for both the dynamic friction coefficient and the static friction coefficient. In addition, both the dynamic friction coefficient and the static friction coefficient are the dynamic friction coefficient and the static friction coefficient along the insertion direction (longitudinal direction) of the laminate 12 into the packaging substrate 20 during production.

[0061] Specifically, the measurement is performed as follows using a measuring device 200 shown in FIG.

[0062] First, the laminate 12 is gently removed from the paper product packaging 1. Next, a sample (a packaging substrate sample 110 as a test piece) of 16 cm in the long side direction × 6 cm in the short side direction (the long side direction is the MD direction of the packaging substrate 20, and the short side direction is the CD direction of the packaging substrate 20) is cut out and collected from the packaging substrate 20 of the paper product packaging 1, and attached to the upper surface of the table 201 of the measuring device 200 so that the inner surface of the packaging substrate 20 (the surface in contact with the laminate 12) becomes the measurement surface. Note that the packaging substrate sample 110 may include perforations on the bottom surface, in which case it is measured with the perforations included.

[0063] Next, one set of tissue paper 11 from the 20th set from the bottom of the laminate 12 is taken. If the 20th set from the bottom has many wrinkles, the tissue paper 11 before or after the 20th set from the bottom (the 19th or 21st set from the bottom) may be used. This set (two sheets) is returned to the original folded state (four sheets). Then, a sample (tissue paper sample 111 as a test piece) of 16 cm x 6 cm (16 cm is the direction in which the laminate 12 is inserted into the packaging base material 20, and 6 cm is the direction perpendicular to this) is cut so as not to include the creases, and attached to the underside of the sled 202. At this time, the laminate 12 is cut in the same direction as when it is inserted into the packaging base material 20 in the actual machine, and both ends in the 16 cm direction are cut so as not to affect the measurement.

[0064] When the measurement is started and the table 201 is moved while the packaging substrate sample 110 and the tissue paper sample 111 are in contact with each other, the sample begins to slip when the frictional force of the sample contact surface reaches its limit relative to the amount of movement of the table 201. The static and kinetic friction coefficients are derived based on the value of the load cell 203 at this time. The static and kinetic friction coefficients are measured three times using the same sample, with the first value being used for the static friction coefficient and the third value being used for the kinetic friction coefficient. This process of measuring three times and using each value is repeated five times using different samples, and the average value is used.

[0065] (packaging format) FIG. 3 is a perspective view showing an example of gusset packaging in a packaging body for paper products.

[0066] As shown in Fig. 3, the packaging format of the paper product 10 using the packaging base material 20 is gusset packaging, in which both longitudinal sides of the paper product package 1 are sealed along the width direction. Gusset packaging is a packaging format in which one end of a tubular packaging base material 20 having a gusset (valley fold 3) is sealed in a horizontal line with a heat seal (sealed portion 4) or the like, the packaged item (paper product 10) is inserted through an insertion opening 21 on the other end side, the insertion opening 21 on the other end side is sealed in a horizontal line with a heat seal (sealed portion 4) or the like, and the sealed portion is cut into individual bags. This gusset packaging can be performed using a known device.

[0067] Although the present invention has been described based on the above embodiment, the present invention is not limited to the contents of the above embodiment, and can be modified as appropriate without departing from the scope of the present invention. In other words, all other embodiments, examples, and operational techniques made by those skilled in the art based on this embodiment are naturally included in the scope of the present invention. EXAMPLES

[0068] The present invention will be described in detail below with reference to examples. However, the present invention is not limited to the examples shown below.

[0069] (Examples 1 to 26 and Comparative Examples 1 to 6) Packed products (paper product packaging) of lotion tissues of Examples 1 to 26 and Comparative Examples 1 to 6 were produced according to the conditions (parameters) shown in Tables 1 to 3. The following two evaluations (evaluation of "operability" and evaluation of "beauty") were carried out for each packed product. Measurement of each parameter was carried out according to the above-mentioned standards or measurement methods. In Tables 1 to 3, "chemical solution content" is expressed as "lotion content".

[0070] (operability) The "operability" evaluation was an evaluation of the operability, including the ease of opening the packaging base material when bagging the product during production, and was rated on a scale of 1 to 5. Specifically, a particularly good or particularly excellent condition was given a score of 5, followed by 4, 3, and 2 points. A score of 1 corresponds to a failure to meet the standards for a commercially available product. Evaluation 5: The packaging base material opened without difficulty during packaging, and packaging went smoothly. Evaluation 4: The packaging base was a little difficult to open during packaging, but packaging was smooth. Evaluation 3: The packaging base was a little difficult to open during packaging, but packaging was possible. Evaluation 2: The packaging base material was difficult to open during packaging, but not to the extent that it was a problem. Evaluation 1: The packaging base material could not be opened during packaging, and packaging was not possible.

[0071] (cosmetic) The cosmetic appearance of the product was evaluated based on the absence of wrinkles in the laminated body and the cleanliness of the cut surface of the packaging base material. In this example, the cosmetic appearance of the tissue paper was evaluated by 30 monitors who chose either "excellent cosmetic appearance" or "poor cosmetic appearance." The cosmetic appearance was evaluated based on the following criteria: Rating 5: More than 29 monitors rated it as "excellent cosmetic quality." Rating 4: 27 to 28 monitors rated the product as "excellent cosmetic quality" Rating 3: Between 25 and 26 monitors rated the product as "excellent cosmetic appearance" Rating 2: 22 to 24 monitors rated the product as "excellent cosmetic appearance" Rating 1: Fewer than 21 monitors rated the product as "excellent cosmetic quality"

[0072] The results are shown in Tables 1 to 4.

[0073] [Table 1]

[0074] [Table 2]

[0075] [Table 3]

[0076] [Table 4]

[0077] As described above, from Tables 1 to 4, it can be seen that according to the present disclosure, it is possible to provide a packaging body for paper products that can improve the operability when packaging paper products and maintain the aesthetic quality of the paper products. [Explanation of symbols]

[0078] 1: Packaging for paper products 10:Paper products 11: Tissue paper 12: Laminate 20: Packaging base material

Claims

1. A packaging body for paper products in which an entire paper product is covered with a packaging base material, The paper product is a laminate of a plurality of tissue papers that have been lotion-treated and contain a medicinal solution, The number of sets of the thin paper included in the laminate is 160 sets or more and 320 sets or less, The packaging substrate includes at least a film substrate, The packaging form of the packaging base material is a gusset packaging in which both sides of the laminate in a predetermined direction intersecting the lamination direction are sealed, The thickness of the packaging substrate is 22 μm or more and 122 μm or less, The dynamic friction coefficient between the inner surface of the packaging substrate and the laminate is 0.10 or more and 0.20 or less. A packaging material for paper products.

2. The basis weight of the packaging substrate is 20 g / m ２ 110g / m or more ２ Is less than or equal to The packaging material for paper products according to claim 1 .

3. The static friction coefficient between the inner surface of the packaging substrate and the laminate is 0.14 or more and 0.24 or less. The packaging material for paper products according to claim 1 or 2.

4. The film substrate of the packaging substrate has a multi-layer structure having a layer of milky white polyethylene as the innermost layer in contact with the laminate. The packaging material for paper products according to claim 1 or 2.

5. When the length of the periphery of the packaging base material with the predetermined direction as its axis is defined as periphery A, and the length of the periphery of the laminate with the predetermined direction as its axis is defined as periphery B, the value expressed by the formula: (periphery A / periphery B)×100(%) is 101% or more and 113% or less. The packaging material for paper products according to claim 1 or 2.

6. The thickness of the thin paper per 10 plies is 0.50 mm / 10 plies or more and 0.90 mm / 10 plies or less. The packaging material for paper products according to claim 1 or 2.

7. The basis weight of one ply of the thin paper is 12 g / m ２ 20g / m or more ２ Is less than or equal to The packaging material for paper products according to claim 1 or 2.

8. The height of the laminate in the lamination direction is 40 mm or more and 180 mm or less. The packaging material for paper products according to claim 1 or 2.

9. The content of the chemical solution in the thin paper is 10% by mass or more and 22% by mass or less. The packaging material for paper products according to claim 1 or 2.

10. The content of the chemical solution per ply of the thin paper is 1.8 g / m ２ 3.2g / m or more ２ Is less than or equal to The packaging material for paper products according to claim 1 or 2.

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