Package for roll-shaped sanitary thin paper

Abstract

A packaging body for roll-shaped thin sanitary papers, which is provided with a paper base material for packaging a plurality of roll-shaped thin sanitary papers, and which is characterized in that: on the surface of the paper base material that comes into contact with the plurality of roll-shaped thin sanitary papers, the surface of the paper base material, except for the region where the peripheral surface of each of the roll-shaped thin sanitary papers comes into contact with the paper base material, is provided with a plurality of roll-shaped thin sanitary papers; and a heat sealing agent is coated.

Description

Technical Field

[0001] The invention relates to a packaging body for roll-shaped sanitary thin paper. Background Art

[0002] Roll-shaped sanitary thin paper packaging bags containing roll-shaped sanitary thin paper such as kitchen paper, paper towels, toilet paper, and toilet paper are circulated and used in a state where a plurality of rolls are contained in a packaging bag made of resin film. In recent years, from the viewpoint of suppressing environmental loads such as global warming and marine pollution such as microplastics associated with CO2 emissions, the trend of changing the packaging bag used for roll-shaped sanitary thin paper packaging bags from resin to paper to reduce the amount of resin used in the packaging bag has become active.

[0003] Patent Document 1 discloses a toilet roll packaging body including a heat seal layer in a paper substrate, a structure in which the heat seal layer is formed on the entire surface of the paper substrate, and a structure in which the heat seal layer is formed only at portions where the paper substrates are stacked or bonded.

[0004] <Prior Art Literature>

[0005] <Patent Documents>

[0006] Patent Document 1: Japanese Patent Application Publication No. 2021-172415 Summary of the invention

[0007] <Problems to be Solved by the Invention>

[0008] When a heat seal layer is formed on the entire surface of a substrate (paper substrate) including paper, if the packaged product is a roll of sanitary thin paper, the peripheral surface of the roll of sanitary thin paper will contact the heat seal layer of the paper substrate. Therefore, the sealant of the heat seal layer may adhere to or stick to the roll of sanitary thin paper, thereby damaging the quality and appearance of the roll of sanitary thin paper.

[0009] On the other hand, if the heat seal layer is provided only as a portion where the paper substrates are laminated or joined to each other, particularly when the packaging form is a candy form, the area where the heat seal layer is formed may become an area with a complex shape, or a spot pattern, or a scattered area. Therefore, the sealing property of the package cannot be ensured, and the possibility that the heat seal agent coating process and the handling after the heat seal layer is formed may become complicated increases.

[0010] An object of the present invention is to provide a packaging body for a roll of sanitary thin paper which can ensure sufficient sealing performance without impairing the quality and appearance of the roll of sanitary thin paper even when the roll of sanitary thin paper is packaged using a paper base material.

[0011] <Methods used to solve the problem>

[0012] According to one embodiment of the present invention, a packaging body for roll-shaped sanitary thin paper is a packaging body including a paper substrate for packaging a plurality of roll-shaped sanitary thin paper, and a heat sealing agent is applied on the surface of the paper substrate in contact with the plurality of roll-shaped sanitary thin paper, except for the area where the peripheral surface of each roll-shaped sanitary thin paper contacts the paper substrate.

[0013] <Effects of the Invention>

[0014] According to one aspect of the disclosed invention, a packaging body for a roll of sanitary thin paper can be provided, which can ensure sufficient sealing performance without deteriorating the quality and appearance of the roll of sanitary thin paper even if the roll of sanitary thin paper is packaged using a paper base. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure shows a package body in which a roll of sanitary thin paper is accommodated in a packaging bag.

[0016] Figure 2 The figure shows the rolled sanitary thin paper contained in the packaging bag.

[0017] Figure 3 Viewed from the top side Figure 1 Figure 1.

[0018] Figure 4 Viewed from the bottom side Figure 1 Figure 1.

[0019] Figure 5 Observed from a side Figure 1 Figure 1.

[0020] Figure 6 Observe from the other side Figure 1 Figure 1.

[0021] Figure 7 Viewed from a short side Figure 1 Figure 1.

[0022] Figure 8 Observed from the other short side Figure 1 Figure 1.

[0023] Fig. 9 This is an expanded view of the packaging bag.

[0024] Fig.10 yes Fig. 9 AA cross-section diagram.

[0025] Fig.11 yes Fig. 9 BB cross-section diagram. DETAILED DESCRIPTION

[0026] <Packaging>

[0027] The embodiments of the present invention are described in detail with reference to the accompanying drawings. In each figure, the same symbols are sometimes marked on the common parts and the description is omitted. In addition, in each figure, the scale of each component is sometimes different from the actual one. It should be noted that in each figure, a three-dimensional orthogonal coordinate system of three-axis directions (X direction, Y direction, Z direction) is used, the length direction of the packaging bag is set to the X direction, the width direction is set to the Y direction, and the height direction (up and down direction or thickness direction) is set to the Z direction.

[0028] Figure 1 It is a figure which shows the packaging body which accommodated the roll in the packaging bag of embodiment. Figure 2 It is a figure which shows the roll accommodated in the packaging bag. Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 The images are observed from the top side, the bottom side, one side surface, another side surface, one short side surface, and another short side surface. Figure 1 The package 100 is an example of a package for roll-shaped sanitary thin paper according to the present embodiment, and includes a packaging bag 10 and a roll 20.

[0029] The roll 20 is an example of a roll-shaped sanitary thin paper contained in a packaging bag. Figure 1 In the example shown, two rolls 20 are contained in the packaging bag 10. Figure 2 As shown, the reel 20 is configured to wind a long sheet 21 around a hollow core 22 .

[0030] There is no particular limitation on the form of the roll 20, and for example, it can be applied to sanitary thin papers such as kitchen paper, paper towels, toilet paper, and toilet paper. There is no particular limitation on the use of the roll 20, and it can be applied to any one of industrial, household, and portable uses. It should be noted that the roll 20 in this embodiment is preferably used for household kitchen paper.

[0031] There is no particular limitation on the packaging form of the packaging bag 10. For example, the packaging may be a packaging (pillow packaging) in which the base material 10A of the packaging bag 10 is processed into a cylindrical shape and the open end of the cylindrical base material 10A is sealed (closed), a packaging (candy packaging bag) in which both ends of the cylindrical packaging bag 10 are folded and sealed (closed) with a sheet, or a packaging formed by combining the above. It should be noted that in the case of a pillow packaging, the cylindrical base material 10A may be folded into a gusseted shape.

[0032] In the packaging body 100 of the present embodiment, the packaging form is configured in a candy-like manner (hereinafter sometimes referred to as "candy-like packaging"). Specifically, the seal portions 30 and 40 (side seals) of the short sides 15 and 16 of the packaging bag 10 are sealed in a folded state, and the seal portion 50 (bottom seal) of the bottom surface 12 of the packaging bag 10 is sealed, and the two rolls 20 are packaged in the packaging bag 10 in a candy-like packaging manner ( Figures 1 to 8 ).

[0033] like Figure 1 , Figure 2 As shown, the peripheral surface 21A of the roll 20 is respectively opposite to the top surface 11, the bottom surface 12, the side surface 13, and the side surface 14 of the packaging bag 10, and a part of the peripheral surface 21A is in contact with a part of the peripheral surface 21A of the adjacent roll 20. Figure 1 , Figure 2 In FIG. 1 , L1, W1, and H1 represent the width, length, and height of the package body 100, respectively. Figure 2 , L2 and W2 represent the width (roll width) and diameter (roll diameter) of the roll 20, respectively.

[0034] The reel 20 has two end surfaces. One end surface is the upper surface 21B, and the other end surface is the lower surface 21C. It should be noted that the upper surface and the lower surface are in a relative relationship, and there is no limitation on the upper and lower sides. Figure 1 , Figure 2 In the illustrated example, the upper surface 21B of the roll 20 faces the short side surfaces 15 of the packaging bag 10 , and the lower surface 21C of the roll 20 faces the short side surfaces 16 of the packaging bag 10 .

[0035] It should be noted that, when two or more rolls 20 are packaged in an overlapping manner (arranged in series), the roll located at the top layer (top layer roll) is accommodated on the short side 15 side of the packaging bag 10, and the upper surface 21B of the top layer roll faces the short side 15 of the packaging bag 10. In addition, the roll located at the bottom layer (bottom layer roll) is accommodated on the short side 16 side of the packaging bag 10, and the lower surface 21C of the bottom layer roll faces the short side 16 of the packaging bag 10.

[0036] The reel 20 has a corner 23B on the upper surface 21B side and a corner 23C on the lower surface 21C side. The corner 23B is a ridge formed by the peripheral surface 21A and the upper surface 21B of the reel 20. The corner 23C is a ridge formed by the peripheral surface 21A and the lower surface 21C.

[0037] like Figure 1As shown in FIG. 1 , when the corners 23B and 23C are packaged with the packaging bag 10, the packaging bag 10 is deformed along the ridges of the corners 23B and 23C and is in close contact. Therefore, when the plurality of rolls 20 are packaged in the packaging bag 10, the corners 23B and 23C are easily subjected to strong pressure from the packaging bag. In particular, Figure 1 As shown, when the packaging form is a candy type (hereinafter sometimes referred to as "candy type packaging"), the corners 23B and 23C receive a strong pressure from the packaging bag.

[0038] There is no particular limitation on the size of the sheet roll 20. 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 ).

[0039] The number of layers of the long sheet 21 is not particularly limited, and may be one or more layers, preferably one or two layers (two sheets stacked together).

[0040] There is no particular limitation on the material of the long sheet 21. For example, sheets of paper, nonwoven fabrics or cloth, etc., can be used, preferably paper (paper sheet). It should be noted that when the long sheet 21 is a paper sheet, base paper with pulp as the main raw material is used. The pulp composition can use a known composition in paper sheets. For example, the mixing ratio of pulp can be 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

[0041] In addition, there is no particular limitation on the pulp composition in the long sheet 21 (paper sheet). For example, conifer pulp such as NBKP (conifer kraft pulp) or NUKP (conifer unbleached pulp) and broadleaf pulp such as LBKP (broadleaf kraft pulp) or LUKP (broadleaf unbleached pulp) can be used in any ratio. It should be noted that there is no limitation on the ratio of broadleaf pulp to conifer pulp, and it is preferably 10:90 to 80:20, and more preferably a pulp composition in which the ratio of conifer pulp to broadleaf pulp is larger. In addition, the pulp contained in the long sheet 21 (paper sheet) can also be waste paper pulp.

[0042] The basis weight of the long sheet 21 is not particularly limited, but depends on the number of layers. In the case of paper, it is 5 g / m 2 Above and 80g / m 2 Below, preferably 10g / m 2 Above and 60g / m 2 Below, more preferably 10g / m 2 Above and 45g / m 2In addition, in the case of nonwoven fabric, it is preferably 20 g / m 2 Above and 100g / m 2 The basis weight is measured in accordance with the provisions of JIS P 8124 (2011).

[0043] In addition, the thickness of the long sheet 21 (paper sheet) is not particularly limited, and the paper thickness measured under the environment of JIS P8111 (1998) can be used. For example, when the long sheet 21 is paper, the paper thickness of each two layers 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.

[0044] In addition, the long sheet 21 (paper sheet) may be embossed. Such embossing can be performed by a known embossing method.

[0045] The hollow core 22 is a cylindrical winding core (see FIG. Figure 2 ). In addition, the hollow core 22 also includes a structure without a winding core (coreless structure). There is no particular limitation on the material of the hollow core 22, and paper, resin, etc. can be used.

[0046] There is no particular limitation on the form of the hollow core 22. For example, when the hollow core 22 is a paper tube, it may be a single-layer thick paper or a multi-layer thick paper, or may be a coated thick paper base paper on which printing or deodorant coating is performed in advance. In addition, there is no particular limitation on the winding method of the paper tube. For example, it may be a flat-rolling method or a spiral winding method (so-called spiral paper tube).

[0047] There is no particular limitation on the size of the hollow core 22. For example, the length of the hollow core 22 in the longitudinal direction (Y direction) is equal to the roll width of the sheet roll 20 in the width direction (Y direction) (85 mm or more and 500 mm or less). In addition, the diameter of the hollow core 22 in the radial direction (X direction or Z direction) is 33 mm or more and 50 mm or less, preferably 35 mm or more and 45 mm or less (see Figure 2 ).

[0048] <Packaging bag>

[0049] Fig. 9 This is a development view viewed from the surface where the packaging bag 10 contacts the roll. Fig.10 yes Fig. 9 AA cross-section diagram, Fig.11 yes Fig. 9 BB cross-section diagram.

[0050] The packaging bag 10 includes a substrate 10A containing a paper component, and heat seal layers 30, 40, 50 (coated with a heat sealant) on one surface of the substrate 10A. Figures 9 to 11 Here, the substrate 10A is an example of a paper substrate constituting the roll-shaped sanitary thin paper packaging body according to the present embodiment.

[0051] The heat seal layer 30 corresponds to the seal portion 30 (side seal) of the short side surface 15 of the packaging bag 10. The heat seal layer 40 corresponds to the seal portion 40 (side seal) of the short side surface 16 of the packaging bag 10. Figure 7 , Fig.11 The heat seal layer 50 corresponds to the seal portion 30 (bottom seal) of the bottom surface 12 of the packaging bag 10 ( Figure 8 , Fig.11 ).

[0052] In addition, in the packaging bag 10 , the ratio of the paper component in the packaging bag 10 is 45% or more, preferably 50% or more, and more preferably 70% or more.

[0053] Here, the paper component is, for example, pulp obtained by gluing plant fibers. The pulp composition in the paper component is not limited, and for example, the ratio of broadleaf pulp to coniferous pulp is 0:100 to 70:30, preferably a pulp composition in which the ratio of coniferous pulp to broadleaf pulp is larger. In addition, waste paper pulp may be used.

[0054] The type of paper used for the base material 10A of the packaging bag 10 is not particularly limited, and for example, packaging paper can be used. Packaging paper is further classified into unbleached packaging paper and bleached packaging paper.

[0055] Examples of the unbleached packaging paper include double-sided kraft paper for heavy packaging, general double-sided kraft paper, special double-sided kraft paper, striped kraft paper, and single-sided waxed kraft paper.

[0056] Examples of the bleached wrapping paper include pure white roll paper, double-sided bleached kraft paper, single-sided waxed bleached kraft paper, and thin film paper.

[0057] The paper used for the base material 10A of the packaging bag 10 is preferably single-sided glossy paper, and more preferably single-sided glossy kraft paper. Here, single-sided glossy paper refers to paper that is heat-dried using a Yankee dryer after papermaking and has one side calendered to be highly glossy.

[0058] The basis weight of the paper used for the base material 10A of the packaging bag 10 is not limited, but is preferably 30 g / m 2 Above and 100g / m 2The basis weight is measured in accordance with the provisions of JIS P 8124 (2011). It should be noted that the basis weight of the paper used for the base material 10A of the packaging bag 10 is preferably changed according to the number of sheet rolls 20 accommodated in the packaging bag 10 .

[0059] For example, when the number of the sheet rolls 20 contained in the packaging bag 10 is four (four rolls), the basis weight of the paper used for the base material 10A of the packaging bag 10 is preferably 30 g / m 2 Above and 60g / m 2 In addition, when the number of the sheet rolls 20 contained in the packaging bag 10 is 12 (12 rolls), the basis weight of the paper used for the base material 10A of the packaging bag 10 is preferably 50 g / m 2 Above and 100g / m 2 the following.

[0060] The thickness of the substrate 10A constituting the packaging bag 10 is not limited, but is preferably 20 μm to 100 μm, more preferably 25 μm to 90 μm, and further preferably 40 μm to 75 μm. The thickness is measured according to JIS P 8118 (2014).

[0061] <Heat sealant coating area>

[0062] In the package 100, as Fig. 9 As shown in FIG. 1 , on the surface (contact surface) of the substrate 10A that contacts the plurality of rolls 20, a heat sealant is applied to the entire surface of the substrate 10A except for the region 18. Fig. 9 In the figure, reference numerals 11 to 16 are associated with a package body containing a roll of sanitary thin paper in a packaging bag. Figure 1 The symbols correspond to the symbols, showing the Figure 1 The packaging bag 10 shown corresponds to the position when it is unfolded.

[0063] As the heat sealant, a known material can be used, for example, a polyolefin-based melt can be used. As the method for applying the heat sealant, a known printing technique can be used, for example, a gravure coating method can be used.

[0064] exist Fig. 9In the example shown, the area 18 includes an area where the peripheral surface 21A of each roll 20 contacts the substrate 10A when the roll 20 is packaged in the packaging bag 10 (peripheral surface contact area 18A), an area where the corner (upper surface corner) 23B on the upper surface 21B side of the roll 20 contacts the substrate 10A (upper surface corner contact area 18B), an area where the corner (lower surface corner) 23C on the lower surface 21C side of the roll 20 contacts the substrate 10A (lower surface corner contact area 18C), and an area where the roll 20 is not in contact, that is, the roll 20 is not in contact with the substrate 10A ( Figure 1 , Figure 7 , Figure 8 , Fig. 9 ).

[0065] It should be noted that in Fig. 9 In FIG. 1 , line C shows the imaginary center line of the package 100 in the longitudinal direction (X direction) of the package 100 (the portion where the roll 20 is adjacent and the peripheral surface 21A of the roll 20 is not in contact with the substrate 10A). Line D shows the imaginary line that defines the upper surface corner contact area 18B between the seal portion 30. Line E shows the imaginary line that defines the lower surface corner contact area 18C between the seal portion 40.

[0066] The width of the region 18 is 200 to 250 mm, preferably 220 to 240 mm, so that the region 18 abuts against the ridges of the peripheral surface 21A, the upper surface corner 23B, and the lower surface corner 23C of the roll 20. The length of the region 18 varies depending on the number of rolls to be packaged, and is preferably set to a length that contacts the substrate 10A, includes the corners 23B and 23C of the roll 20, and covers the entire circumference of the packaged roll 20.

[0067] In the packaging body 100 according to the present embodiment, as described above, since the heat sealant is not applied to the peripheral surface contact area 18A of the substrate 10A, the peripheral surface 21A of each roll 20 does not contact the heat seal layer 30, 40, 50 of the substrate 10A. Therefore, even if the substrate 10A having the heat seal layer 30, 40, 50 formed on the contact surface (the surface of the substrate 10A in contact with the plurality of rolls 20) is used to package the plurality of rolls 20, the quality and appearance of each roll 20 are unlikely to be impaired.

[0068] In addition, even if the upper surface 21B and the lower surface 21C of the roll 20 are in contact with the heat seal layers 30, 40, 50, the possibility of deteriorating the quality and appearance is relatively small. Therefore, in the package 100, as described above, even if a plurality of rolls 20 are packaged using the base material 10A provided with the heat seal layers 30, 40, 50, the sealing property as the package can be ensured in a manner that does not deteriorate the quality and appearance of each roll 20.

[0069] Furthermore, in the package 100, the peripheral surface contact area 18A of the substrate 10A not coated with the heat sealant is an area that is easy to print, and this area becomes a prominent position on the outer surface of the package 100 when the roll 20 is packaged. Therefore, even when a plurality of rolls 20 are packaged using the substrate 10A provided with the heat seal layer 30, 40, 50, it is possible to print at a prominent position on the outer surface of the package 100.

[0070] Furthermore, as described above, since the heat sealant is not applied to the peripheral surface contact region 18A occupying most of the substrate 10A, the area of ​​application of the heat sealant is reduced, and the amount of the applied heat sealant can be reduced.

[0071] In addition, in the packaging body 100 according to the present embodiment, as described above, in addition to the peripheral surface contact area 18A of the substrate 10A, the upper surface corner contact area 18B and the lower surface corner contact area 18C of the substrate 10A are not coated with a heat sealant. As a result, the two corners 23B and 23C of each roll 20 do not contact the heat seal layer 30, 40, 50. Therefore, even if a plurality of rolls 20 are packaged using the substrate 10A having the heat seal layer 30, 40, 50 formed on the contact surface, the quality and appearance of each roll 20 are further less likely to be impaired.

[0072] As described above, since the heat sealant is not applied to the portions in contact with the corners 23B and 23C of the packaged roll 20, the unapplied region 18 can be formed as a narrow straight line. Therefore, the outer shape of the applied region can be prevented from becoming complicated.

[0073] In the package 100 according to the present embodiment, as described above, the heat sealant is not applied to the contact surface of the base material 10A, which is particularly likely to deteriorate the quality and appearance of each roll 20 if it contacts the heat seal layer 30, 40, 50. Therefore, in the package 100, even when a plurality of rolls 20 are packaged in a candy manner, it is possible to print at a prominent position on the outer surface of the package while ensuring the sealing property of the package in a manner that does not deteriorate the quality and appearance of each roll 20.

[0074] In addition, as described above, by configuring the corners 23B and 23C of each reel 20 not to contact the heat sealing layers 30, 40, and 50, when a plurality of reels 20 are packaged in a candy manner, even if the corners 23B and 23C of each reel 20 are subjected to strong pressure from the substrate 10A, it is difficult to damage the quality and appearance of each reel 20.

[0075] In the packaging body 100 according to the present embodiment, as described above, since the heat sealant is not coated on the contact surface of the substrate 10A which would be particularly susceptible to damaging the quality and appearance of each roll 20 if in contact with the heat seal layers 30, 40, 50, each roll 20 is hardly affected by the heat sealant regardless of the shape of the roll 20.

[0076] Therefore, in the packaging body 100, even if each roll 20 packaged using the substrate 10A having a heat-sealing layer 30, 40, 50 formed on the contact surface is any one of kitchen paper, paper towels, toilet paper or toilet paper, it is possible to print at a prominent position on the outer surface of the packaging body while ensuring the sealing performance of the packaging body in a manner that does not damage the quality and appearance of each roll 20.

[0077] It should be noted that the package 100 may be a package including a substrate 10A for packaging a plurality of rolls 20 stacked at least two layers up and down. In this case, a heat sealant is applied to the entire surface of the substrate 10A except for the peripheral surface contact area 18A, the area where the upper surface corner 23B of the uppermost roll 20 contacts the substrate 10A (upper surface corner contact area 18B), and the area where the lower surface corner 23C of the lowermost roll 20 contacts the substrate 10A (lower surface corner contact area 18C).

[0078] Thus, the upper surface corner 23B of the uppermost roll 20 and the lower surface corner 23C of the lowermost roll 20 do not contact the heat seal layers 30, 40, 50. Therefore, even when a plurality of rolls 20 are stacked at least in two layers along the central axis of the rolls and packaged using the base material 10A having the heat seal layers 30, 40, 50 formed on the contact surface, the quality and appearance of each roll 20 are unlikely to be impaired.

[0079] It should be noted that, as the range of the heat sealant coating, for example Figure 1 In the packaging body 100 shown, when the plurality of rolls 20 are packaged, the rectangular area including all areas where the packaging bag 10 contacts the peripheral surface 21A, the upper surface 21B and the lower surface 21C of the roll 20 can be set as an area where the heat sealant is not applied.

[0080] By setting such a rectangular area as an area where the heat sealant is not applied, the entire surface of the roll 20 wrapped by the heat sealant layers 30, 40, 50, including the corners 23B and 23C, does not come into contact with the heat sealant layers 30, 40, 50. Therefore, the roll 20 does not come into contact with the heat sealant layers 30, 40, 50 of the substrate 10A not only during the packaging process of the roll 20 but also during the circulation and sales of the roll 20, so that the quality and appearance of the roll 20 are less likely to be impaired by the heat sealant.

[0081] In particular, when the heat sealant is easily attached to the roll 20 due to the material of the roll 20 and the properties of the heat sealant, as the range for applying the heat sealant, a rectangular area including all areas of the peripheral surface contact area 18A, the upper surface corner contact area 18B, and the lower surface corner contact area 18C of the substrate 10A in the state of packaging a plurality of rolls 20 can be set as an area where the heat sealant is not applied. This can prevent the heat sealant from adhering to the roll 20. In addition, the amount of heat sealant used can be further reduced.

[0082] It should be noted that in the substrate 10A constituting the packaging bag 10, the other side of the substrate 10A is still a paper substrate ( Figures 9 to 11 ). It should be noted that a resin layer may be formed on the other surface to serve as a coating layer for protecting the outer surface of the package. In addition, an area for printing a design or text on the outer surface of the package 100 may be provided on the resin layer.

[0083] The material of the resin layer is not particularly limited, and is, for example, a thermoplastic resin, preferably a low-density polyethylene. It should be noted that the low-density polyethylene may be any of high-pressure low-density polyethylene (LDPE) and linear low-density polyethylene (L-LDPE).

[0084] Although the embodiment of the present invention has been described above, the present invention is not limited to the specific embodiment, and various modifications and changes can be made within the scope of the invention described in the claims.

[0085] Preferred aspects of the present invention are described below.

[0086] In the first embodiment of the present invention, a packaging body for roll-shaped sanitary thin paper is provided, which is a packaging body including a paper substrate for packaging multiple roll-shaped sanitary thin paper, and a heat sealing agent is coated on the surface of the paper substrate that contacts the multiple roll-shaped sanitary thin paper, except for the area where the peripheral surface of each roll-shaped sanitary thin paper contacts the paper substrate.

[0087] Here, in a roll of sanitary thin paper (hereinafter sometimes referred to as a "roll"), one of the two end faces separated in the central axis direction of the roll is called an upper surface, and the other end face is called a lower surface. It should be noted that the upper surface and the lower surface are opposite surfaces, and for example, the upper and lower surfaces are not limited. In addition, a heat seal layer is formed in the area where the heat sealant is applied to the surface of the paper substrate that contacts each roll of sanitary thin paper (hereinafter sometimes referred to as a "contact surface" or "contact surface of the paper substrate").

[0088] In addition, the circumferential surface of the roll constitutes the side surface between the upper surface and the lower surface of the roll. It should be noted that, in each packaged roll, the circumferential surface of the roll is the part that is particularly likely to damage the quality and appearance of each roll if it contacts the heat seal layer of the paper substrate.

[0089] In the first embodiment, since the heat sealant is not applied to the area where the peripheral surface of each roll contacts the paper substrate (hereinafter sometimes referred to as "peripheral surface contact area" or "peripheral surface contact area of ​​the paper substrate"), the peripheral surface of each roll does not contact the heat seal layer of the paper substrate. Therefore, even if a plurality of rolls are packaged using a paper substrate having a heat seal layer formed on the contact surface, the quality and appearance of each roll are unlikely to be impaired.

[0090] It should be noted that in the first embodiment, a heat sealant is applied to an area where the upper surface of the roll contacts the paper substrate (hereinafter sometimes referred to as the "upper surface contact area" or the "upper surface contact area of ​​the paper substrate") or an area where the lower surface of the roll contacts the paper substrate (hereinafter sometimes referred to as the "lower surface contact area" or the "lower surface contact area of ​​the paper substrate"), which is an area other than the peripheral surface contact area of ​​the paper substrate.

[0091] However, even if the upper and lower surfaces of the roll come into contact with the heat seal layer, the possibility of deteriorating the quality and appearance is relatively small. Therefore, in the first embodiment, even if a plurality of rolls are packaged using a paper substrate provided with a heat seal layer, the sealing property of the package can be ensured without deteriorating the quality and appearance of each roll.

[0092] Furthermore, in the first embodiment, the peripheral contact area of ​​the paper substrate not coated with the heat sealant is an area that is easy to print, and this area becomes a prominent position on the outer surface of the package when the roll is packaged. Therefore, even when a plurality of rolls are packaged using a paper substrate provided with a heat seal layer, printing can be performed at a prominent position on the outer surface of the package.

[0093] In the second scheme according to the present invention, a packaging body for roll-shaped sanitary thin paper is provided, which is a packaging body including a paper substrate for packaging multiple roll-shaped sanitary thin paper, and a heat sealing agent is coated on the surface of the paper substrate that contacts the multiple roll-shaped sanitary thin paper, except for the peripheral surface of each roll-shaped sanitary thin paper and the corner formed by the peripheral surface of each roll-shaped sanitary thin paper and the upper surface or the lower surface, which contacts the paper substrate.

[0094] It should be noted that, in each of the packaged rolls, the parts that are subjected to strong pressure from the paper substrate are the corners formed by the circumference and the upper surface of each roll (hereinafter sometimes referred to as "upper surface corners"), and the corners formed by the circumference and the lower surface of each roll (hereinafter sometimes referred to as "lower surface corners"). Therefore, the upper and lower surface corners of each roll are the parts that are particularly likely to damage the quality and appearance of each roll if they come into contact with the heat seal layer.

[0095] In the second embodiment, in addition to the peripheral surface contact area, the area where the upper surface corner and the lower surface corner of each roll contact the paper substrate (hereinafter sometimes referred to as "corner contact area" or "corner contact area of ​​the paper substrate") is not coated with a heat sealant. Therefore, since the two corners of each roll will not contact the heat seal layer, even if a plurality of rolls are packaged using a paper substrate with a heat seal layer formed on the contact surface, the quality and appearance of each roll are less likely to be impaired.

[0096] In the third scheme according to the present invention, a packaging body for roll-shaped sanitary thin paper is provided, which is a packaging body including a paper substrate for packaging a plurality of roll-shaped sanitary thin paper stacked at least in two layers vertically, and a heat sealing agent is coated on the peripheral surface of each roll-shaped sanitary thin paper, the corner formed by the peripheral surface and the upper surface of the topmost roll-shaped sanitary thin paper, and the corner formed by the peripheral surface and the lower surface of the bottommost roll-shaped sanitary thin paper, except for the area where the paper substrate contacts.

[0097] In this specification, the case where a plurality of roll-shaped sanitary thin paper is stacked in at least two layers means that two or more rolls are stacked (or arranged in series) along the same axis. The top roll refers to the outermost roll of one of the stacked rolls, and the bottom roll refers to the outermost roll of another roll.

[0098] It should be noted that when multiple rolls are stacked at least two layers along the central axis of the rolls and packaged, the parts that are subjected to strong pressure from the paper substrate are the upper surface corners of the roll located at the top layer (hereinafter sometimes referred to as the "top layer roll") and the lower surface corners of the roll located at the bottom layer (hereinafter sometimes referred to as the "bottom layer roll"). That is, the upper surface corners of the top layer roll and the lower surface corners of the bottom layer roll are the parts that will particularly damage the quality and appearance of each roll if they come into contact with the heat seal layer.

[0099] In the third embodiment, in addition to the circumferential surface contact area, the heat sealing agent is not applied to the area where the upper surface corner of the top roll contacts the paper substrate (hereinafter sometimes referred to as the "upper surface corner contact area" or the "upper surface corner contact area of ​​the paper substrate") and the area where the lower surface corner of the bottom roll contacts the paper substrate (hereinafter sometimes referred to as the "lower surface corner contact area" or the "lower surface corner contact area of ​​the paper substrate").

[0100] Thus, the upper surface corners of the uppermost roll and the lower surface corners of the lowermost roll will not contact the heat seal layer. Therefore, in the second embodiment, even when a plurality of rolls are stacked at least in two layers along the central axis of the rolls using a paper substrate having a heat seal layer formed on the contact surface and packaged, the quality and appearance of each roll are unlikely to be impaired.

[0101] In the third embodiment, the heat sealant is applied to the upper surface contact area of ​​the uppermost roll or the lower surface contact area of ​​the lowermost roll, which is an area other than the peripheral surface contact area, upper surface corner contact area and lower surface corner contact area of ​​the paper substrate.

[0102] However, even if the upper surface of the uppermost roll and the lower surface of the lowermost roll come into contact with the heat seal layer, the possibility of damaging the quality and appearance is relatively small. Therefore, in the third embodiment, even if a plurality of rolls are packaged using a paper substrate provided with a heat seal layer, the sealing property of the package can be ensured without damaging the quality and appearance of each roll.

[0103] Furthermore, in the third embodiment, the contact area of ​​the circumferential surface of the paper substrate not coated with the heat sealant is an area that is easy to print, and this area becomes a prominent position on the outer surface of the package when the roll is packaged. Therefore, even when a plurality of rolls are stacked at least two layers along the central axis of the rolls and packaged using a paper substrate having a heat seal layer formed on the contact surface, printing can be performed at a prominent position on the outer surface of the package.

[0104] According to a fourth aspect of the present invention, there is provided the package for roll-shaped sanitary thin paper according to any one of the first to third aspects, wherein the plurality of roll-shaped sanitary thin paper are packaged in a candy manner.

[0105] In the fourth embodiment, the heat sealant is not applied to the contact surface of the paper substrate (the surface of the paper substrate that contacts the roll) which is particularly likely to deteriorate the quality and appearance of each roll if it contacts the heat seal layer. Therefore, even when a plurality of rolls are packaged in a candy-like manner, it is possible to print at a prominent position on the outer surface of the package while ensuring the sealing property of the package without deteriorating the quality and appearance of each roll.

[0106] In the fourth embodiment, when a plurality of rolls are packaged in a candy-like manner, the corners of each roll (when a plurality of roll-shaped sanitary thin paper is stacked in at least two layers, the upper surface corners of the uppermost roll and the lower surface corners of the lowermost roll) are susceptible to strong pressure from the paper substrate. However, in the fourth embodiment, by configuring the corners of each roll not to contact the heat-sealing layer, when a plurality of rolls are packaged in a candy-like manner, even if the corners of each roll are subjected to strong pressure from the paper substrate, the quality and appearance of each roll are unlikely to be impaired.

[0107] According to a fifth aspect of the present invention, there is provided a package for a rolled sanitary thin paper according to any one of the first to fourth aspects, wherein the rolled sanitary thin paper is any one of kitchen paper, paper towel, toilet paper or toilet paper.

[0108] In the fifth embodiment, since the heat sealant is not applied to the contact surface of the paper substrate which would particularly easily deteriorate the quality and appearance of each roll if in contact with the heat seal layer, each roll is less likely to be affected by the heat sealant regardless of the roll shape.

[0109] Therefore, in the fifth scheme, even if each roll packaged with a paper substrate having a heat-seal layer formed on the contact surface is any one of kitchen paper, paper towels, toilet paper or toilet paper, it is possible to print at a prominent position on the outer surface of the packaging body while ensuring the sealing performance of the packaging body in a manner that does not impair the quality and appearance of each roll.

[0110] This application is based on Japanese patent application No. 2022-088488 filed on May 31, 2022 as the basis for claiming priority, and all contents are cited here.

[0111] Explanation of symbols

[0112] 100 packing

[0113] 10 packing bags

[0114] 10A substrate (paper substrate)

[0115] 11 Top

[0116] 12 Bottom

[0117] 13, 14 side

[0118] 15, 16 short side

[0119] 18 area (area not coated with heat sealant)

[0120] 18A Circumferential contact area

[0121] 18B Upper surface corner contact area

[0122] 18C bottom surface corner contact area

[0123] 20 rolls (rolled sanitary thin paper)

[0124] 21 long sheets

[0125] 21A Circumference

[0126] 21B upper surface

[0127] 21C lower surface

[0128] 23B corner (top corner)

[0129] 23C corner (bottom surface corner)

[0130] 30, 40, 50 sealing part (heat sealing layer).

Claims

1. A packaging body for roll-shaped sanitary thin paper, comprising a paper substrate for packaging a plurality of roll-shaped sanitary thin paper, A heat sealant is applied to the surface of the paper substrate that contacts the plurality of sanitary thin paper rolls, except for a region where the peripheral surface of each of the sanitary thin paper rolls contacts the paper substrate.

2. A packaging body for roll-shaped sanitary thin paper, comprising a paper substrate for packaging a plurality of roll-shaped sanitary thin paper, A heat sealant is applied on the surface of the paper substrate that contacts the plurality of rolls of sanitary thin paper, except for the area where the peripheral surface of each roll of sanitary thin paper and the corner formed by the peripheral surface and the upper surface or the lower surface of each roll of sanitary thin paper contact the paper substrate.

3. A packaging body for roll-shaped sanitary thin paper, comprising a paper base material for packaging a plurality of roll-shaped sanitary thin paper stacked at least two layers up and down, A heat sealant is applied except for the areas where the peripheral surfaces of each roll of sanitary thin paper, the corners formed by the peripheral surface and the upper surface of the top layer of the roll of sanitary thin paper, and the corners formed by the peripheral surface and the lower surface of the bottom layer of the roll of sanitary thin paper contact the paper substrate.

4. The packaging body for roll-shaped sanitary thin paper according to any one of claims 1 to 3, wherein: The plurality of roll-shaped sanitary thin papers are packaged in a candy-like manner.

5. The packaging body for roll-shaped sanitary thin paper according to any one of claims 1 to 3, wherein: The roll-shaped sanitary thin paper is any one of kitchen paper, paper towel, toilet paper or toilet paper.

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