Packaging for rolled sanitary tissue paper

Abstract

To provide a package for roll-like sanitary tissue paper in which a heat seal agent is coated on a base material and the heat seal agent (heat seal layer) does not come into contact with a corner part of a roll even when roll-like sanitary tissue paper is packaged using the base material containing paper.SOLUTION: In a package which contains a paper base material for packaging a plurality of pieces of roll-like sanitary tissue paper, on a surface which comes into contact with the plurality of pieces of roll-like sanitary tissue paper of the paper base material, a heat seal agent is coated except for a region in which a corner part formed by a peripheral surface and an upper surface or a lower surface of the roll-like sanitary tissue paper comes into contact with the paper base material.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a packaging body for rolled sanitary tissue paper. [Background technology]

[0002] Packaging bags for rolled thin sanitary paper, such as kitchen paper, paper towels, toilet paper, and tissue paper, are distributed and used with multiple rolls housed in a packaging bag made of resin film.In recent years, from the perspective of reducing environmental impacts such as global warming due to CO2 emissions and marine pollution caused by microplastics, there has been an active movement to switch from resin to paper packaging bags for rolled thin sanitary paper, thereby reducing the amount of resin used in the packaging bags (for example, Patent Document 1).

[0003] Patent Document 1 describes a toilet roll packaging body that includes a heat seal layer on a paper base material. When the paper base material includes a heat seal layer, it discloses a case where the heat seal layer is formed on the entire surface of the paper base material, and a case where the heat seal layer is formed only on the area where paper base materials are laminated and joined together. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-172415 Summary of the Invention [Problem to be solved by the invention]

[0005] When a heat-seal layer is formed over the entire surface of a paper substrate and the product being packaged is in roll form, the corners (ridges) where the periphery and end faces of the roll intersect come into contact with the packaging bag, so the contact surface comes into contact with the heat-seal layer. This creates the risk that the heat-sealing agent will adhere to or bond with the roll product, damaging the quality and appearance of the rolled product. This problem is particularly evident when packaging caramel candy, as the corners are the areas most subject to pressure.

[0006] On the other hand, if the heat seal layer is only formed in the area where the paper substrates are laminated and joined together, the area where the heat seal layer is formed may have a complex shape, a mottled pattern, or isolated areas, especially in the case of caramel packaging. This increases the possibility that the coating process of the heat seal agent and handling after the heat seal layer is formed will become complicated.

[0007] The object of the embodiment is to provide a packaging body for rolled sanitary tissue paper in which a heat seal agent is coated on a substrate, so that even when the rolled sanitary tissue paper is packaged using a substrate containing paper, the heat seal agent (heat seal layer) does not come into contact with the corners of the roll. [Means for solving the problem]

[0008] The first embodiment of the disclosed invention is a packaging body for rolled sanitary thin paper, including a paper base material for packaging multiple rolled sanitary thin paper, in which a heat sealing agent is applied to the surface of the paper base material that comes into contact with the multiple rolled sanitary thin paper, except for the areas where the corners formed by the peripheral surface and the top or bottom surface of the rolled sanitary thin paper come into contact with the paper base material.

[0009] Here, one of the two end faces of the rolled sanitary thin paper (hereinafter sometimes referred to as a "roll") that are spaced apart in the central axis direction is referred to as the upper face, and the other end face is referred to as the lower face. The upper and lower faces are relative, and there is no set top or bottom, for example.

[0010] According to the first embodiment, the heat sealant is applied to the rolled sanitary thin paper except for the areas where the corners formed by the peripheral and upper or lower surfaces come into contact with the paper base material. Therefore, regardless of the packaging format, the corners do not come into contact with the heat sealant (hereinafter sometimes referred to as the "heat seal layer"), and the corners of the roll are not damaged by the heat sealant.

[0011] A second embodiment of the disclosed invention is a packaging body for rolled sanitary tissue paper, in which the plurality of rolled sanitary tissue paper sheets are packaged using a caramel method.

[0012] When packaging a plurality of rolls of sanitary tissue paper using the caramel method, even if the corners of the rolls are subjected to strong pressure from the paper substrate, the corners of the rolls are not damaged by the heat sealing agent because the heat sealing agent is not applied to the surface in contact with the paper substrate.

[0013] A third embodiment of the disclosed invention is a packaging body for rolled sanitary thin paper as described in claim 1 or 2, wherein, when the multiple rolled sanitary thin paper is stacked in at least two or more layers, the areas where the corners formed by the peripheral surface and the top or bottom surface of the rolled sanitary thin paper come into contact with the paper base material are the corners formed by the peripheral surface and top surface of the topmost rolled sanitary thin paper and the corners formed by the peripheral surface and bottom surface of the bottommost rolled sanitary thin paper.

[0014] Here, when multiple rolls of thin sanitary paper are stacked vertically in at least two or more layers, this refers to two or more rolls stacked along the same axis (or lined up in series). The topmost roll refers to the outermost roll of one of the stacked rolls, and the bottommost roll refers to the outermost roll of the other stack.

[0015] According to the third embodiment, when multiple rolls of sanitary tissue paper are stacked in two or more layers at least along the central axis of the rolls, the corners that receive strong pressure from the paper substrate are the corners formed by the circumferential surface and top surface of the topmost roll and the corners formed by the circumferential surface and bottom surface of the bottommost roll. Because the areas where these corners come into contact with the paper substrate are not coated with sealing agent, the corners do not come into contact with the sealing agent, and the corners of the rolls are not damaged by the heat sealing agent.

[0016] A fourth embodiment of the disclosed invention is a package for rolled sanitary thin paper, wherein the plurality of rolled sanitary thin paper sheets are any of kitchen paper, paper towels, toilet paper, and tissue paper.

[0017] A plurality of rolls of any of kitchen paper, paper towels, toilet paper, and tissue paper are packaged in a packaging base material coated with a heat sealant, except for the areas where the corners formed by the peripheral surface and the upper or lower surface of the roll come into contact with the paper base material, so that the corners do not come into contact with the heat sealant and the corners of the roll are not damaged by the heat sealant. [Effects of the Invention]

[0018] According to one aspect of the disclosed invention, a package for rolled sanitary tissue paper can be provided in which a heat sealant (heat seal layer) is coated on a paper substrate, so that even when the rolled sanitary tissue paper is packaged using a substrate containing paper, the heat sealant (heat seal layer) does not come into contact with the corners of the roll. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a diagram showing a package in which a roll of sanitary tissue paper is contained in a packaging bag. [Figure 2] FIG. 2 is a diagram showing a roll of sanitary thin paper contained in a packaging bag. [Figure 3] FIG. 2 is a view of the packaging body of FIG. 1 as seen from the top side. [Figure 4]FIG. 2 is a view of the package of FIG. 1 as seen from the bottom side. [Figure 5] FIG. 2 is a view of the package of FIG. 1 as seen from one side. [Figure 6] 2 is a view of the packaging body of FIG. 1 as seen from the other side. FIG. [Figure 7] FIG. 2 is a view of the packaging body of FIG. 1 as seen from one end face side. [Figure 8] 2 is a view of the packaging body of FIG. 1 as seen from the other end face side. [Figure 9] FIG. 2 is a development view of the packaging bag as seen from the surface that contacts the roll. [Figure 10] 10 is a cross-sectional view taken along the line AA in FIG. 9. DETAILED DESCRIPTION OF THE INVENTION

[0020] <Package> An embodiment of the present invention will be described in detail with reference to the drawings. In each drawing, common parts are given the same reference numerals and their description may be omitted. In addition, the scale of each member in each drawing may differ from the actual scale. In each drawing, a three-dimensional Cartesian coordinate system with three axial directions (X direction, Y direction, and Z direction) is used, with the width direction of the packaging bag being the X direction, the longitudinal direction being the Y direction, and the height direction (vertical direction or thickness direction) being the Z direction.

[0021] Fig. 1 is a diagram showing a package in which a roll is housed in a packaging bag of an embodiment. Fig. 2 is a diagram showing the roll housed in the packaging bag. Figs. 3, 4, 5, 6, 7, and 8 are views of the package in Fig. 1 as seen from the top side, bottom side, one side side, the other side side, one end side, and the other end side, respectively. Package 100 is an example of a package according to this embodiment, and includes a packaging bag 10 and a roll 20 of sanitary tissue paper.

[0022] The roll 20 is an example of a roll of sanitary thin paper that is housed in the packaging bag according to this embodiment. In the example shown in Fig. 1, two rolls 20 are housed in the packaging bag 10. As shown in Fig. 2, the roll 20 is configured by winding a long sheet 21 around a hollow core 22.

[0023] The form of the roll 20 is not particularly limited, and it can be applied to, for example, sanitary thin paper such as kitchen paper, toilet paper, paper towels, and tissue paper. The use of the roll 20 is not particularly limited, and it can be applied to industrial, household, and portable uses. Among these, household kitchen paper is preferably used as the roll 20 in this embodiment.

[0024] As shown in Fig. 1, the peripheral surface 21A of the roll 20 faces the top surface 11, bottom surface 12, side surface 13, and side surface 14 of the packaging bag 10, respectively, and a part of the peripheral surface 21A contacts a part of the peripheral surface 21A of the adjacent roll 20. In Fig. 1 etc., W1, L1, and H1 respectively indicate the length, width, and height of the packaging body 100. Also, 30, 40, and 50 indicate seals.

[0025] The roll 20 has two end faces. One end face is an upper face 21B, and the other end face is a lower face 21C. The upper and lower faces are in a relative relationship, and are not necessarily top and bottom.

[0026] When two or more rolls 20 are stacked (arranged in series), the roll on the upper surface 21B is the uppermost roll, and the roll on the lower surface 21C is the lowermost roll.

[0027] Corner 23B is a ridge portion formed by peripheral surface 21A and upper surface 21B of roll 20. Corner 23C is a ridge portion formed by peripheral surface 21A and lower surface 21C. As shown in Fig. 1, when packaging is performed in packaging bag 10, these corners 23B and 23C deform along the ridges of corners 23B and 23C and come into close contact. In particular, when packaging is performed in caramel packaging as shown in Fig. 1, corners 23B and 23C are subjected to strong pressure from the packaging bag.

[0028] The dimensions of the roll 20 are not particularly limited, but the width dimension (roll width) L2 of the long sheet 21 in the width direction (Y direction) is preferably 85 mm or more and 500 mm or less, and the diameter dimension (roll diameter) W2 of the long sheet 21 in the radial direction (X direction or Z direction) is preferably 80 mm or more and 200 mm or less (see Figure 2).

[0029] The number of plies of the long sheet 21 is not particularly limited, but can be one or more plies, and is preferably one ply or two plies (two layers stacked).

[0030] The material of the long sheet 21 is not particularly limited, but may be, for example, paper, nonwoven fabric, cloth, or the like, with paper (paper sheet) being preferred. When the long sheet 21 is a paper sheet, base paper containing pulp as the main raw material is used. The pulp composition may be any known composition for paper sheets. For example, the pulp content may be 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

[0031] The pulp composition of the long sheet 21 (paper sheet) is not particularly limited. For example, any ratio of softwood pulp, such as NBKP (softwood kraft pulp) or NUKP (softwood unbleached pulp), to hardwood pulp, such as LBKP (hardwood kraft pulp) or LUKP (hardwood unbleached pulp), can be used. The ratio of hardwood pulp to softwood pulp is not limited, but is preferably 10:90 to 80:20, and more preferably, the ratio of softwood pulp to hardwood pulp is higher. Furthermore, recycled paper pulp may be used as the pulp contained in the long sheet 21 (paper sheet).

[0032] The basis weight of the long sheet 21 is not particularly limited, but in the case of paper, it is 5 g / m 2 More than 80g / m 2 and preferably 10 g / m 2 More than 60g / m 2 Less than 10 g / m, more preferably 2 More than 45g / m 2 In the case of nonwoven fabric, the density is 20 g / m 2 More than 100g / m 2 The following is desirable: Basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0033] The thickness of the long sheet 21 (paper sheet) is not particularly limited, and can be the paper thickness measured under the environment of JIS P 8111 (1998). For example, when the long sheet 21 is paper, the paper thickness is 50 μm or more and 600 μm or less, preferably 60 μm or more and 500 μm or less, and more preferably 130 μm or more and 400 μm or less per two plies.

[0034] The long sheet 21 (paper sheet) may be embossed by a known embossing method.

[0035] The hollow core 22 is a cylindrical core around which the long sheet 21 is wound in the circumferential direction (R direction) (see FIG. 2). The hollow core 22 may have a structure without a core (coreless structure). The material of the hollow core 22 is not particularly limited, and paper, resin, etc. may be used.

[0036] The form of the hollow core 22 is not particularly limited, and for example, when the hollow core 22 is a paper tube, it may be made of either a single layer of cardboard or multiple layers of cardboard, or it may be a coated cardboard base paper that has been printed on or coated with a deodorant in advance. In addition, the winding method of the paper tube is not particularly limited, and it may be, for example, flat-wound or spirally wound (so-called spiral paper tube).

[0037] The dimensions of the hollow core are not particularly limited. For example, the length of the hollow core 22 in the longitudinal direction (Y direction) is approximately the same as the roll width in the width direction (Y direction) of the roll 20 (85 mm to 500 mm). The diameter dimension of the hollow core 22 in the radial direction (X direction or Z direction) is 33 mm to 50 mm, preferably 35 mm to 45 mm (see FIG. 2).

[0038] <Packaging bag> The packaging bag 10 is an example of the packaging bag according to the present embodiment. Fig. 9 is a development view of the packaging bag 10 as seen from the surface that contacts the roll. Fig. 10 is a view showing the AA cross section of Fig. 9.

[0039] The packaging bag 10 has a paper layer 10A containing a paper component and a heat seal layer 30 in which a heat seal agent is applied to one side of the paper layer 10A (FIG. 10).

[0040] The packaging bag 10 has a paper component ratio of 45% or more. Here, the paper component is, for example, plant fiber agglutinated (pulp). The pulp composition of the paper component is not limited, and for example, the ratio of hardwood pulp to softwood pulp is 0:100 to 70:30, and preferably the pulp composition has a higher ratio of softwood pulp to hardwood pulp. Furthermore, recycled paper pulp may be used as the pulp.

[0041] The material of the paper layer 10A constituting the packaging bag 10 is not particularly limited, but it can be made of, for example, kraft paper or rayon paper. Here, kraft paper is paper made from kraft pulp. Rayon paper is made by blending rayon fiber, which is chemically synthesized from wood pulp or the like, with kraft pulp. In order to achieve both softness and strength in the packaging bag 10, it is preferable that the rayon fiber content of the rayon paper be 20% or less by mass.

[0042] The basis weight of the paper layer 10A constituting the packaging bag 10 is not limited, but is preferably 10 g / m 2 More than 40g / m 2 or less, more preferably 15 g / m 2 More than 35g / m 2 More preferably, 20 g / m or less 2 More than 30g / m 2 The basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0043] The thickness of the paper layer 10A constituting the packaging bag 10 is not limited, but is, for example, preferably 20 μm or more and 100 μm or less, more preferably 25 μm or more and 90 μm or less, and even more preferably 40 μm or more and 75 μm or less. The thickness is measured in accordance with the provisions of JIS P 8118 (2014).

[0044] <Heat sealant coating area> Fig. 9 is a development view of the packaging bag 10 coated with a coating agent on the surface that contacts the roll. Fig. 10 is a cross-sectional view taken along line AA in Fig. 9. In the packaging bag, a heat seal agent is coated on one surface of the paper base material (paper layer) 10A that contacts the roll, forming a heat seal layer 30.

[0045] 9, the heat sealing agent is applied to the entire surface except for region 18. Region 18 includes regions where corners 23B and 23C (FIG. 2) of roll 20 come into contact with the paper base material when roll 20 is packaged in a packaging bag, as well as regions that face corners 23B and 23C but do not come into contact with the paper base material.

[0046] The width of region 18 is 5 to 20 mm, and more preferably 10 to 15 mm, so that the center of the width coincides with the ridge line of the corner of roll 20. The length of region 18 depends on the number of rolls to be packaged, but it is preferable to form it so that it extends over the entire circumference of the roll to be packaged, including the corners of roll 20 that come into contact with the paper substrate.

[0047] In this way, the heat-sealing agent is not applied to the areas that come into contact with the corners 23A and 23B of the roll to be wrapped, so the uncoated area 18 can be made narrow and linear. As a result, the contour of the coated area does not become complicated. Furthermore, since the coated area is reduced, the amount of heat-sealing agent to be applied can be reduced.

[0048] In Figure 9, the symbols 11 to 15 correspond to the symbols in the diagram showing the package in which rolled sanitary tissue paper is contained in a packaging bag shown in Figure 1, and indicate the corresponding positions when the package 10 shown in Figure 1 is unfolded.

[0049] Known materials can be used as the heat sealing agent, and known methods such as printing techniques can be used as the coating method.

[0050] As an area to which the heat sealing agent is applied, for example, in the package 100 shown in Figure 1, when multiple rolls 20 are packaged, a rectangular area that includes all of the areas where the packaging bag contacts the circumferential surface, upper surface, and lower surface of the roll can be defined as an area to which the heat sealing agent is not applied.

[0051] By leaving these rectangular areas as areas where the heat seal agent is not applied, the heat seal layer does not come into contact with any surface, including the corners, of the roll 20 it packages. Therefore, not only during the roll packaging process but also throughout the distribution and sale of the roll product, the roll does not come into contact with the heat seal layer of the packaging bag, so the appearance of the product is not impaired by the heat seal agent.

[0052] In particular, if the heat-sealing agent is likely to adhere to the paper substrate due to the roll material and the properties of the heat-sealing agent, the area to which the heat-sealing agent is not applied can be set to a rectangular area that includes all of the areas where the packaging bag contacts the circumferential surface, upper surface, and lower surface of the roll when multiple rolls 20 are packaged, thereby preventing the heat-sealing agent from adhering to the roll and reducing the amount of heat-sealing agent used.

[0053] In the cross-sectional view of FIG. 10, the other surface of the packaging bag 10 remains made of paper. A resin layer can be formed on another surface to function as a coating layer that protects the outer surface of the package. The resin layer can also be used as an area where designs or text can be printed on the outer surface of the package 100.

[0054] The thermoplastic resin material contained in the printable area is not particularly limited, but is preferably low-density polyethylene, which may be either high-pressure low-density polyethylene (LDPE) or linear low-density polyethylene (L-LDPE).

[0055] Although the embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments, and various modifications and changes are possible within the scope of the invention described in the claims. [Explanation of symbols]

[0056] 100 packages 10 packaging bags 10A paper layer 10B, 10C resin layer 18 Area where the heat seal agent does not come into contact with the corner of the roll (area where the heat seal agent is not applied) 20 Rolled sanitary tissue paper (roll) 21 Long Sheet 21A Roll surface 21B Top of roll 21C Bottom of the roll 23B, 23C Corner of roll 30 Seal (heat seal layer)

Claims

1. A packaging body for rolled sanitary thin paper, comprising a paper substrate for packaging a plurality of rolled sanitary thin paper, wherein a heat sealing agent is applied to the surface of the paper substrate that comes into contact with the plurality of rolled sanitary thin paper, except for the area where the corners formed by the peripheral surface and the top or bottom surface of the rolled sanitary thin paper come into contact with the paper substrate.

2. The package for rolled sanitary tissue paper according to claim 1, wherein the plurality of rolled sanitary tissue paper sheets are packaged in a caramel style.

3. 3. A packaging body for rolled sanitary thin paper according to claim 1 or 2, wherein when the plurality of rolled thin sanitary paper sheets are stacked in at least two or more layers, the areas where the corners formed by the peripheral surface and the top or bottom surface of the rolled thin sanitary paper sheets come into contact with the paper substrate are the corners formed by the peripheral surface and the top surface of the topmost rolled thin sanitary paper sheet and the corners formed by the peripheral surface and the bottom surface of the bottommost rolled thin sanitary paper sheet.

4. 4. The package for rolled sanitary tissue paper according to claim 1, wherein the plurality of rolled sanitary tissue paper rolls are either kitchen paper, paper towels, toilet paper, or tissue paper.

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