Storage box for sanitary thin paper

Abstract

To provide a storage box for sanitary thin paper which does not use a plastic film at its take-out port, allows a first sheet of sanitary thin paper to be easily picked up, and allows the second and subsequent sheets to be easily taken out, and prevents the sanitary thin paper from dropping back.SOLUTION: A storage box 10 for sanitary thin paper according to the present disclosure includes: a laminate 40; a storage box body 20 having a top surface part 20a with an opening 22 formed therein; a pair of first paper window parts 30A protruding close to each other into the opening 22 from both sides in a longitudinal direction; and a pair of second paper window parts 30B protruding close to each other into the opening 22 from both sides in a width direction. The first window part 30A and the second window part 30B are formed in a trapezoidal shape or a circular arc shape, a take-out port 31 is defined between the first window parts 30A and between the second window parts 30B, and four slits 32a to 32d extending continuously from the take-out port 31 are formed between the first window part 30A and the second window part 30B.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a storage box for sanitary tissue paper. [Background technology]

[0002] For sanitary thin paper such as tissue paper, a storage box (carton) is widely used, in which a rectangular parallelepiped paper box body has a ring-shaped perforation at a predetermined position on the top surface to form an outlet for the sanitary thin paper, and a plastic film (window sheet) such as a polyethylene film having a linear slit is fixed inside the outlet. Since this window sheet needs to be separated for recycling, attempts are being made to use paper as the window sheet.

[0003] For example, Patent Document 1 discloses a pop-up type tissue paper carton. In this tissue paper carton, a circular perforation is carved in a predetermined position on the upper surface of a rectangular parallelepiped carton body to form an opening for taking out the tissue paper, and a window application sheet made of paper or wet-processed synthetic fiber paper is fixed to cover the cut piece cut out by the perforation from the back side. The window application sheet has a longitudinal slit and a branch slit as an opening for taking out the tissue paper. The opening for taking out the window application sheet is made of a longitudinal slit made of a deformed rectangular cut part having a width of 5 to 10 mm, and at least two branch slits branching outward radially from both edges of the longitudinal slit.

[0004] Patent Document 2 discloses a tissue packaging box. An opening is formed on the top surface of the rectangular box body. The opening is covered with a sheet of Japanese paper, which is attached to the back surface of the box body. A slit is formed in the sheet, and the tissue paper is taken out through the slit. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2001-278366 A [Patent Document 2] Utility Model Registration No. 2543492 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in conventional specifications using paper for the window sheet, such as the tissue paper carton (storage box for sanitary thin paper) described in Patent Document 1 and the tissue paper packaging box (storage box for sanitary thin paper) described in Patent Document 2, the tissue paper (sanitary thin paper) content is sandwiched between linear slits. As a result, when the tissue paper is removed, a wide area of ​​the tissue paper comes into contact with the window sheet, making it easy for the tissue paper or the paper window sheet to tear, especially in the early stages of removal. In addition, friction between the tissue paper and the paper window sheet can cause paper dust and unpleasant noises, impairing the functionality and aesthetics of the window.

[0007] Therefore, the object of the present disclosure is to provide a storage box for sanitary tissue paper which does not use plastic film at the removal opening, is easy to pick up the first sheet of sanitary tissue paper, allows easy removal of the second sheet and subsequent sheets, has a small contact area between the sanitary tissue paper and the paper window, and prevents the sanitary tissue paper from dropping back. [Means for solving the problem]

[0008] In order to solve the above problems, a storage box for sanitary tissue paper of a first aspect of the present invention comprises a storage box body having a stack of sanitary tissue paper and a rectangular top surface portion with an opening formed therein, and storing the stack; a pair of first window portions made of paper fixed to the top surface portion and protruding close to each other into the opening from both sides in the longitudinal direction of the top surface portion; and a pair of second window portions made of paper fixed to the top surface portion and protruding close to each other into the opening from both sides in the width direction intersecting the longitudinal direction of the top surface portion, wherein the pair of first window portions and the pair of second window portions are formed in a trapezoidal shape that protrudes tapering toward the inside of the opening, or in an arc shape that bulges toward the inside of the opening, and an outlet through which the sanitary tissue paper can be removed is defined between the pair of first window portions and between the pair of second window portions, and four slits extending continuously from the outlet are formed between the first window portion and the second window portion.

[0009] A second aspect of the present invention is a storage box for sanitary thin paper of the first aspect described above, wherein the value represented by the formula: (the width direction length of the opening) ÷ (the width direction length of the top surface portion) is 0.42 or greater and 0.89 or less.

[0010] A third aspect of the present invention is a storage box for sanitary thin paper of the first aspect or the second aspect, wherein the value represented by the formula: (the width direction length of the outlet) ÷ (the width direction length of the top surface portion) is 0.04 or more and 0.55 or less.

[0011] A fourth aspect of the present invention is a storage box for sanitary thin paper of the first aspect or the second aspect, wherein the value represented by the formula: (the longitudinal length of the outlet) ÷ (the longitudinal length of the laminate) is 0.18 or greater and 0.48 or less.

[0012] A fifth aspect of the present invention is a storage box for sanitary thin paper of the first aspect or the second aspect, wherein the widthwise length of the opening is 50 mm or more and 98 mm or less, the widthwise length of the top surface is 100 mm or more and 130 mm or less, and the widthwise length of the outlet is 5 mm or more and 60 mm or less.

[0013] A sixth aspect of the present invention is a storage box for sanitary thin paper of the first aspect or the second aspect, wherein the longitudinal length of the outlet is 40 mm or more and 100 mm or less, and the longitudinal length of the laminate is 185 mm or more and 240 mm or less.

[0014] A seventh aspect of the present invention is the sanitary thin paper storage box of the first aspect or the second aspect, wherein the pair of first window portions and the pair of second window portions have a basis weight of 30 g / m 2 More than 90g / m 2 The following is the result.

[0015] An eighth aspect of the present invention is a storage box for sanitary thin paper of the first aspect or the second aspect, wherein the thickness of the pair of first window portions and the pair of second window portions is 30 μm or more and 120 μm or less.

[0016] A ninth aspect of the present invention is a storage box for sanitary thin paper according to the first aspect or the second aspect, wherein the basis weight of the base material constituting the storage box body is 270 g / m 2 More than 400g / m 2 The following is the result.

[0017] A tenth aspect of the present invention is a storage box for sanitary thin paper of the first aspect or the second aspect, wherein the thickness of the base material constituting the storage box body is 300 μm or more and 450 μm or less.

[0018] An eleventh aspect of the present invention is a storage box for sanitary thin paper according to the first aspect or the second aspect, wherein the basis weight of the sanitary thin paper per product ply is 18 g / m 2 More than 32g / m 2 The following is the result.

[0019] A twelfth aspect of the present invention is a storage box for sanitary thin paper of the first aspect or the second aspect, wherein the tensile strength DMDT per product ply in the MD direction when dry based on JIS P 8113 of the sanitary thin paper is 220 cN / 25 mm or more and 490 cN / 25 mm or less.

[0020] A thirteenth aspect of the present invention is a storage box for sanitary thin paper of the first aspect or the second aspect, wherein the tensile strength DCDT per product ply in the CD direction when dry based on JIS P 8113 of the sanitary thin paper is 60 cN / 25 mm or more and 200 cN / 25 mm or less. Effect of the Invention

[0021] According to the present disclosure, it is possible to provide a storage box for sanitary tissue paper which does not use plastic film at the removal opening, is easy to pick up the first sheet of sanitary tissue paper, has good removal properties for the second sheet and subsequent sheets, has a small contact area between the sanitary tissue paper and the paper window, and is less likely to cause the sanitary tissue paper to drop back. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is a perspective view of a storage box for sanitary thin paper according to a first embodiment of the present invention. [Diagram 2] 2 is a cross-sectional view of the sanitary tissue paper storage box of FIG. 1 as viewed from the width direction. [Diagram 3] FIG. 2 is a plan view of the sanitary tissue paper storage box of FIG. 1. [Figure 4] FIG. 4 is a perspective view of a storage box for sanitary thin paper according to a second embodiment of the present invention. [Diagram 5] FIG. 5 is a plan view of the sanitary tissue paper storage box of FIG. 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, a storage box for sanitary tissue paper according to one embodiment of the present invention will be described in detail with reference to the drawings. However, these are presented for illustrative purposes and are not intended to limit the present invention.

[0024] In this specification, the "longitudinal direction" refers to the longitudinal direction of the top surface of the sanitary thin paper storage box, and is the direction along the arrow X in the figure. The inner side of the longitudinal direction refers to the direction toward the center in the longitudinal direction, and the outer side of the longitudinal direction refers to the direction away from the center in the longitudinal direction. The "width direction" refers to the direction intersecting (orthogonal) with the longitudinal direction, and refers to the short side direction of the top surface of the sanitary thin paper storage box, and is the direction along the arrow Y in the figure. The inner side of the width direction refers to the direction toward the center in the width direction, and the outer side of the width direction refers to the direction away from the center in the width direction. The height direction refers to the direction intersecting (orthogonal) with both the longitudinal direction and the width direction, and is the direction along the arrow Z in the figure.

[0025] A sanitary thin paper storage box 10 according to a first embodiment of the present invention will be described.

[0026] Fig. 1 is a perspective view of a sanitary thin paper storage box according to a first embodiment of the present invention. Fig. 2 is a cross-sectional view of the sanitary thin paper storage box of Fig. 1 as viewed from the width direction. Fig. 3 is a plan view of the sanitary thin paper storage box of Fig. 1.

[0027] (Hygienic tissue paper storage box) 1 to 3, a storage box 10 for sanitary thin paper according to this embodiment includes a stack 40 of sanitary thin paper 40a, a storage box body 20 that stores the stack 40, a pair of first window portions 30A, and a pair of second window portions 30B. In the following description, the pair of first window portions 30A and the pair of second window portions 30B may be collectively referred to as "window portions 30A, 30B."

[0028] (Storage box body) The storage box body 20 is a rectangular parallelepiped paper box formed by folding a single sheet of paperboard (plate-shaped body) called a carton blank, and defines a storage space 21 therein for storing the laminate 40. The paperboard serving as the base material for the storage box body 20 is preferably a multi-layered laminated paper manufactured by a multi-layer papermaking device. The storage box body 20 may also be called a carton.

[0029] The storage box main body 20 has a top surface portion 20a that defines the upper part of the storage space 21, a bottom surface portion 20b that defines the lower part of the storage space 21, a first side surface portion 20c and a second side surface portion 20d that define both sides of the longitudinal direction of the storage space 21, and a third side surface portion 20e and a fourth side surface portion 20f that define both sides of the transverse direction of the storage space 21.

[0030] (grammage of storage box body) The basis weight of the base material constituting the storage box body 20 (hereinafter referred to as "basis weight of the storage box body 20") is 270 g / m 2 More than 400g / m 2 The basis weight of the storage box body 20 is preferably 270 g / m or less. 2 If the basis weight is lower than 400 g / m, the carton becomes easily distorted and it becomes difficult to maintain the window portions 30A, 30B in the appropriate shape, making it difficult to prevent the next sanitary thin paper 40a taken out from falling into the storage box body 20 (hereinafter referred to as "drop back"). 2 If the sanitary thin paper 40a is made higher than this, the portions of the window portions 30A, 30B that are in contact with the storage box body 20 are likely to tear when the sanitary thin paper 40a is taken out. 2 More preferably, it is 300 g / m or more. 2 The upper limit of the above range of the basis weight of the storage box body 20 is 355 g / m 2 More preferably, it is 340 g / m or less. 2 It is more preferable that the basis weight of the storage box body 20 is equal to or less than 100 g / m2.

[0031] (Thickness of storage box body) The thickness of the base material constituting the storage box body 20 (hereinafter referred to as the "thickness of the storage box body 20") is preferably 300 μm or more and 450 μm or less. If the thickness of the storage box body 20 is lower than 300 μm, the carton becomes easily distorted, and it becomes difficult to maintain the window parts 30A, 30B in an appropriate shape, so that it becomes difficult to suppress dropback. On the other hand, if the thickness of the storage box body 20 is higher than 450 μm, the parts of the window parts 30A, 30B that are in contact with the storage box body 20 are easily torn when the sanitary thin paper 40a is taken out. The lower limit of the above range of the thickness of the storage box body 20 is more preferably 320 μm or more, and even more preferably 340 μm or more. The upper limit of the above range of the thickness of the storage box body 20 is more preferably 430 μm or less, and even more preferably 410 μm or less.

[0032] The thickness of the storage box main body 20 is measured using a thickness gauge (a dial thickness gauge "PEACOCK" manufactured by Ozaki Manufacturing Co., Ltd.). The measurement conditions are a measurement load of 3.7 kPa, a gauge head diameter of 30 mm, a sample is placed between the gauge head and the measurement table, and the gauge is read when the gauge head is lowered at a speed of 1 mm per second or less. This measurement is repeated 10 times (measurements are made at 10 different locations rather than the same location 10 times), and the average of the measurement results is taken as the thickness of the storage box main body 20.

[0033] (Width of storage box body) The width direction length Wc (length in the Y direction) of the top surface portion 20a of the storage box main body 20 is preferably 100 mm or more and 130 mm or less. If the width direction length Wc of the top surface portion 20a is shorter than 100 mm, the carton becomes easily distorted, and it becomes difficult to maintain the window portions 30A, 30B in an appropriate shape, so that it becomes difficult to suppress dropback. On the other hand, if the width direction length Wc of the top surface portion 20a is longer than 130 mm, the stack 40 of the sanitary thin paper 40a inside becomes easily movable in the width direction, and the stacked structure of the stack 40 becomes easily collapsed or deteriorated due to friction, so that the sanitary thin paper 40a becomes easily torn when taken out. In addition, the lower limit value of the above range of the width direction length Wc of the top surface portion 20a is more preferably 105 mm or more, and even more preferably 110 mm or more. Moreover, the upper limit of the above range of the width direction length Wc of the top surface portion 20a is more preferably 125 mm or less, and further preferably 120 mm or less.

[0034] (opening) The top surface 20a of the storage box body 20 is a rectangular surface surrounded by a pair of sides extending in the longitudinal direction parallel to each other and a pair of sides extending in the width direction parallel to each other, and has an opening 22 for pulling out the sanitary thin paper 40a. The opening 22 is an opening for arranging the window parts 30A and 30B. The opening 22 in this embodiment is formed in an elliptical shape having a major axis extending along the longitudinal direction. The opening 22 is arranged at the center of the longitudinal direction of the top surface 20a and at the center of the lateral direction. The opening 22 may be opened in advance, or may be an opening 22 that is formed (opened) by cutting off the cut piece along the perforation when used, by providing a cut piece on the inside of the opening 22 through a perforation along the edge of the opening 22. In addition, in this embodiment, the shape of the opening 22 is an ellipse, but is not limited to this. For example, the shape of the opening 22 may be a rectangular shape that is long in the longitudinal direction, or may be another shape. In addition, the term "elliptical" is not limited to an ellipse, but also includes a shape close to an ellipse (approximately an ellipse). In addition, the term "rectangular" is not limited to a rectangle, but also includes a shape close to a rectangle (approximately a rectangle), for example, with rounded corners.

[0035] (Opening width) The width direction length Wo1 of the opening 22 (the maximum length of the central portion in the longitudinal direction in this embodiment) is preferably 50 mm or more and 98 mm or less. If the width direction length Wo1 of the opening 22 is shorter than 50 mm, the take-out port 31 described later will also be narrowed accordingly, so that the hands will be more likely to come into contact with the pair of second window portions 30B when taking out the sanitary thin paper 40a, and the second window portion 30B will be more likely to be torn. On the other hand, if the width direction length Wo1 of the opening 22 is longer than 98 mm, the area of ​​the window portions 30A, 30B will be larger accordingly, and the window portions 30A, 30B will be more likely to be torn. The lower limit value of the above range of the width direction length Wo1 of the opening 22 is more preferably 60 mm or more, and more preferably 70 mm or more. The upper limit value of the above range of the width direction length Wo1 of the opening 22 is more preferably 92 mm or less, and more preferably 90 mm or less.

[0036] (Relationship between opening and top surface) The value A represented by the following formula (1) is preferably 0.42 or more and 0.89 or less. Value A=(width direction length Wo1 of opening 22)÷(width direction length Wc of top surface portion 20a) (1) If the value A is set lower than 0.42, the opening 22 becomes narrower, and the outlet 31 described later also becomes narrower, so that when the sanitary thin paper 40a is taken out, the hands are more likely to come into contact with the pair of second window portions 30B, and the second window portion 30B becomes more likely to be torn. On the other hand, if the value A is set higher than 0.89, the area of ​​the opening 22 becomes larger, and the area of ​​the window portions 30A, 30B becomes larger accordingly, so that the window portions 30A, 30B become more likely to be torn. The lower limit of the above range of the value A is more preferably 0.50 or more, and more preferably 0.58 or more. The upper limit of the above range of the value A is more preferably 0.84 or less, and more preferably 0.82 or less.

[0037] (Window section) A pair of first window portions 30A and a pair of second window portions 30B made of paper are fixed to the periphery of the opening 22 on the lower surface of the top surface portion 20a. The paper used for the window portions 30A and 30B is selected from printing paper including coated paper and uncoated paper, calligraphy paper, wrapping paper, processing base paper, copy paper, glassine paper, craft paper, etc. The paper used for the window portions 30A and 30B may be synthetic fiber paper (chemical fiber paper), but from the viewpoint of recycling, it is preferable that the paper be made from natural plant fibers such as wood pulp. The pair of first window portions 30A and the pair of second window portions 30B may be composed of one sheet of paper integrated in the area outside the opening 22, or may be four sheets of paper formed separately from each other.

[0038] The pair of first window portions 30A are fixed to the top surface portion 20a and protrude close to each other into the opening 22 from both longitudinal sides of the top surface portion 20a. The pair of second window portions 30B are fixed to the top surface portion 20a and protrude close to each other into the opening 22 from both widthwise sides of the top surface portion 20a. Between the pair of first window portions 30A and between the pair of second window portions 30B, an outlet 31 through which the sanitary thin paper 40a can be taken out is defined. Four slits 32a-32d extending continuously from the outlet 31 are formed between the first window portion 30A and the second window portion 30B.

[0039] (Window weight) The basis weight of the window portions 30A and 30B is 30 g / m 2 More than 90g / m 2 The window portions 30A and 30B preferably have a basis weight of 30 g / m or less. 2 If the basis weight of the window portions 30A and 30B is lower than 90 g / m, the window portions 30A and 30B will be easily torn. 2 If the grammage of the window portions 30A and 30B is higher than 40 g / m, the sanitary thin paper 40a is easily torn when the sanitary thin paper 40a is taken out. 2 More preferably, it is 50 g / m or more. 2The upper limit of the above range of the basis weight of the window portions 30A and 30B 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 window portions 30A, 30B is a value measured based on JIS P 8124.

[0040] (Window thickness) The thickness of the window portions 30A, 30B is preferably 30 μm or more and 120 μm or less. If the thickness of the window portions 30A, 30B is less than 30 μm, the window portions 30A, 30B become easily torn. On the other hand, if the thickness of the window portions 30A, 30B is greater than 120 μm, the sanitary thin paper 40a becomes easily torn when the sanitary thin paper 40a is removed. The lower limit of the above range of the thickness of the window portions 30A, 30B is more preferably 50 μm or more, and even more preferably 70 μm or more. The upper limit of the above range of the thickness of the window portions 30A, 30B is more preferably 100 μm or less, and even more preferably 80 μm or less.

[0041] The thickness of the window portions 30A and 30B is measured using a thickness gauge (a dial thickness gauge "PEACOCK (FFA-1)" manufactured by Ozaki Manufacturing Co., Ltd.). The measurement conditions are a measurement load of 1.25 N and a gauge head diameter of 5 mm. The sample is placed between the gauge head and the measurement table, and the gauge is read when the gauge head is lowered at a speed of 1 mm per second or less. This measurement is repeated 10 times (measurements are made at 10 different locations rather than the same location 10 times), and the average of the measurement results is taken as the thickness of the window portions 30A and 30B.

[0042] In this embodiment, the window portions 30A and 30B are formed in an arc shape with their edges bulging toward the inside of the opening 22. The pair of first window portions 30A are formed symmetrically in the width direction. The pair of second window portions 30B are formed symmetrically in the longitudinal direction. The edges of the pair of first window portions 30A are spaced apart from each other in the longitudinal direction. The edges of the pair of second window portions 30B are spaced apart from each other in the width direction. In this way, the edges of the pair of first window portions 30A are spaced apart from each other in the longitudinal direction, and the edges of the pair of second window portions 30B are spaced apart from each other in the width direction, so that the outlet 31 is defined inside the edges of the pair of first window portions 30A and the edges of the pair of second window portions 30B. In addition, the edges of the first window portions 30A and the second window portions 30B adjacent to each other are spaced apart from each other. In this way, the edges of the first window portion 30A and the second window portion 30B adjacent to each other are spaced apart from each other, so that four slits 32a to 32d are formed between the first window portion 30A and the second window portion 30B. Note that the term "arc-shaped" is not limited to an arc, but also includes a shape close to an arc (approximately an arc). In addition, in this embodiment, the pair of first window portions 30A are formed symmetrically in the width direction, and the pair of second window portions 30B are formed symmetrically in the longitudinal direction, but this is not limiting. For example, at least one of the first window portion 30A and the second window portion 30B may be intentionally formed asymmetrically so that the outlet 31 is located at a position that is shifted in parallel in the width direction or the longitudinal direction from the position in this embodiment.

[0043] (Outlet) The outlet 31 is an opening for taking out the sanitary thin paper 40a. In this embodiment, the edges of the pair of first window portions 30A and the edges of the pair of second window portions 30B are formed in an arc shape that bulges toward the inside of the opening 22. As a result, both longitudinal sides of the outlet 31 (the edges of the pair of first window portions 30A) bulge inward in the longitudinal direction so that their central portions in the width direction approach each other. In addition, both width sides of the outlet 31 (the edges of the pair of second window portions 30B) bulge inward in the width direction so that their central portions in the longitudinal direction approach each other.

[0044] (Outlet dimensions) The width direction length Wo2 of the outlet 31 (the minimum length of the central portion in the longitudinal direction in this embodiment) is preferably 5 mm or more and 60 mm or less. If the width direction length Wo2 of the outlet 31 is shorter than 5 mm, the outlet 31 becomes narrow, and when taking out the sanitary thin paper 40a, the hands are likely to touch the pair of second window portions 30B, and the second window portion 30B is likely to be torn. On the other hand, if the width direction length Wo2 of the outlet 31 is longer than 60 mm, the width of the slits 32a to 32d becomes wide, and it becomes difficult to suppress drop back. In addition, the lower limit value of the above range of the width direction length Wo2 of the outlet 31 is more preferably 7 mm or more, and more preferably 10 mm or more. In addition, the upper limit value of the above range of the width direction length Wo2 of the outlet 31 is more preferably 40 mm or less, and more preferably 20 mm or less.

[0045] The longitudinal length Lo of the outlet 31 (the minimum length of the central part in the width direction in this embodiment) is preferably 40 mm or more and 100 mm or less. If the longitudinal length Lo of the outlet 31 is shorter than 40 mm, the outlet 31 becomes narrow, and the sanitary thin paper 40a becomes easily torn when the sanitary thin paper 40a is taken out. On the other hand, if the longitudinal length Lo of the outlet 31 is longer than 100 mm, the width of the slits 32a to 32d becomes wide, and it becomes difficult to suppress drop back. The lower limit of the above-mentioned range of the longitudinal length Lo of the outlet 31 is more preferably 50 mm or more, and even more preferably 60 mm or more. The upper limit of the above-mentioned range of the longitudinal length Lo of the outlet 31 is more preferably 90 mm or less, and even more preferably 80 mm or less.

[0046] (Relationship between outlet and top surface) The value B represented by the following formula (2) is preferably 0.04 or more and 0.55 or less. Value B=(width direction length Wo2 of outlet 31)÷(width direction length Wc of top surface portion 20a) (2) If the value B is set lower than 0.04, the outlet 31 becomes narrower, and the sanitary thin paper 40a and the second window portion 30B become more likely to tear when the sanitary thin paper 40a is taken out. On the other hand, if the value B is set higher than 0.55, the width of the slits 32a to 32d becomes wider, and it becomes difficult to suppress drop back. The lower limit of the above range of the value B is more preferably 0.06 or more, and even more preferably 0.08 or more. The upper limit of the above range of the value B is more preferably 0.36 or less, and even more preferably 0.18 or less.

[0047] (Relationship between outlet and stack) The value C represented by the following formula (3) is preferably 0.18 or more and 0.48 or less. Value C=(length of outlet 31 in the longitudinal direction Lo)÷(length of laminate 40 in the longitudinal direction Lp) (3) If the value C is lower than 0.18, the take-out opening 31 becomes narrow, and the sanitary thin paper 40a becomes more likely to tear when the sanitary thin paper 40a is taken out. On the other hand, if the value C is higher than 0.48, the take-out opening 31 becomes too large for the sanitary thin paper 40a, making it difficult to suppress drop back. The lower limit of the above range of the value C is more preferably 0.22 or more, and even more preferably 0.26 or more. The upper limit of the above range of the value C is more preferably 0.43 or less, and even more preferably 0.39 or less.

[0048] (4 slits) The four slits 32a-32d are gaps for retaining the sanitary thin paper 40a to prevent dropback, and extend from the outlet 31 toward the corners of the rectangular top surface 20a. The two slits 32a, 32b on one side in the width direction extend in a direction inclined with respect to the longitudinal direction from both ends of the outlet 31 in the longitudinal direction toward the outer side in the longitudinal direction and the outer side in the width direction (one side). On the other hand, the two slits 32c, 32d on the other side in the width direction extend in a direction inclined with respect to the longitudinal direction from both ends of the outlet 31 in the longitudinal direction toward the outer side in the longitudinal direction and the outer side in the width direction (the other side). The distance between the two slits 32a, 32b (hereinafter referred to as "slit width") is preferably shorter than the width Wo2 of the outlet 31.

[0049] In this embodiment, the edges of the pair of first window portions 30A and the edges of the pair of second window portions 30B are formed in an arc shape that bulges toward the inside of the opening 22. As a result, both sides (the edges of the first window portion 30A and the edges of the second window portion 30B) constituting the four slits 32a to 32d are curved so as to bulge in a direction approaching each other. Therefore, the slit width of the four slits 32a to 32d gradually narrows in a direction away from the outlet 31 side, and is closest at the middle part, and gradually widens from the closest part toward the corner part of the top surface portion 20a. Note that the position where the slit width of the four slits 32a to 32d is closest is not limited to the middle part, and may be closest on the outlet 31 side or the corner part of the top surface portion 20a.

[0050] (hygienic tissue paper) As shown in FIG. 2, the sanitary thin paper 40a is stored in the storage space 21 of the storage box body 20 as a stack 40 stacked so as to be able to pop up. The sanitary thin paper 40a is a set of 2-ply (two-ply), folded in a V shape when viewed from the longitudinal direction of the storage box body 20, and stacked so as to be able to pop up while alternately sandwiching each other. The pull-out direction of the sanitary thin paper 40a is preferably the CD (Cross Direction). The stack 40 of the sanitary thin paper 40a is inserted into the storage space 21 from one side (the first side surface portion 20c or the second side surface portion 20d side) in the longitudinal direction of the storage box body 20. The pull-out direction of the sanitary thin paper 40a may be the MD (Machine Direction) direction.

[0051] The sanitary thin paper 40a in the present invention includes, for example, sanitary thin paper such as toilet paper, paper towels, table napkins, kitchen paper, kitchen towels, and wipers made of paper or nonwoven fabric, and most preferably tissue paper. The sanitary thin paper 40a may be made of any material, including paper, natural fibers, synthetic fibers, and the like, but may also be made of nonwoven fabric such as meltblown nonwoven fabric, spunlace nonwoven fabric, or composite nonwoven fabric made by laminating these.

[0052] (Length of laminate in longitudinal direction) The longitudinal length Lp of the laminate 40 is preferably 185 mm or more and 240 mm or less. If the longitudinal length Lp of the laminate 40 is shorter than 185 mm, the sanitary thin paper 40a is difficult to be engaged with the four slits 32a to 32d, and dropback is difficult to suppress. On the other hand, if the longitudinal length Lp of the laminate 40 is longer than 240 mm, the sanitary thin paper 40a is easily torn when removed. The lower limit of the longitudinal length Lp of the laminate 40 is more preferably 196 mm or more, and even more preferably 207 mm or more. The upper limit of the longitudinal length Lp of the laminate 40 is more preferably 234 mm or less, and even more preferably 228 mm or less.

[0053] (Basis weight per product ply) The basis weight of the sanitary thin paper 40a per product ply (2 plies in this embodiment) is 18 g / m 2 More than 32g / m 2 The basis weight of the sanitary thin paper 40a per product ply is preferably 18 g / m 2 If the basis weight per product ply of the sanitary thin paper 40a is lower than 32 g / m, the sanitary thin paper 40a will be easily torn. 2 If the thickness is higher than 100 mm, the window portions 30A and 30B will be easily torn. The lower limit of the above range of the basis weight per product ply of the sanitary thin paper 40a is 20 g / m 2 More preferably, it is 22 g / m or more. 2 The upper limit of the above range of the basis weight per product ply of the sanitary thin paper 40a is 30 g / m 2 More preferably, it is 28 g / m or less. 2 It is even more preferable that the basis weight per product ply of the sanitary thin paper 40a is a value measured based on JIS P 8124. In addition, the basis weight per product ply of the sanitary thin paper 40a is a value in the state of the final product, regardless of whether or not the sanitary thin paper 40a contains a chemical solution.

[0054] (DMDT tensile strength per ply) The tensile strength DMDT (Dry Machine Direction Tensile strength) per product ply in the MD direction when dry based on JIS P 8113 of the sanitary thin paper 40a is preferably 220 cN / 25 mm or more and 490 cN / 25 mm or less. If the tensile strength DMDT of the sanitary thin paper 40a is lower than 220 cN / 25 mm, the sanitary thin paper 40a becomes easily torn. On the other hand, if the tensile strength DMDT of the sanitary thin paper 40a is higher than 490 cN / 25 mm, the window portions 30A, 30B become easily torn. The lower limit of the above range of the tensile strength DMDT of the sanitary thin paper 40a is more preferably 265 cN / 25 mm or more, and even more preferably 310 cN / 25 mm or more. Moreover, the upper limit of the above range of the tensile strength DMDT of the sanitary thin paper 40a is more preferably 450 cN / 25 mm or less, and even more preferably 360 cN / 25 mm or less.

[0055] (Tensile strength per ply DCDT) The tensile strength DCDT (Dry Cross Direction Tensile strength) per product ply in the CD direction when dry based on JIS P 8113 of the sanitary thin paper 40a is preferably 60 cN / 25 mm or more and 200 cN / 25 mm or less. If the tensile strength DCDT of the sanitary thin paper 40a is lower than 60 cN / 25 mm, the sanitary thin paper 40a becomes easily torn. On the other hand, if the tensile strength DCDT of the sanitary thin paper 40a is higher than 200 cN / 25 mm, the window portions 30A, 30B become easily torn. The lower limit of the above range of the tensile strength DCDT of the sanitary thin paper 40a is more preferably 80 cN / 25 mm or more, and even more preferably 120 cN / 25 mm or more. Moreover, the upper limit of the above range of the tensile strength DCDT of the sanitary thin paper 40a is more preferably 180 cN / 25 mm or less, and even more preferably 160 cN / 25 mm or less.

[0056] The tensile strengths DMDT and DCDT of the sanitary thin paper 40a are based on JIS P 8113. The tensile strength in the machine direction when dry is measured by preparing a 25 mm wide sample of the product ply and measuring it at a pulling speed of 300 mm / min. This measurement is repeated five times, and the average of the measurement results is the tensile strengths DMDT and DCDT of the sanitary thin paper 40a.

[0057] In the sanitary thin paper storage box 10 configured as described above, an outlet 31 through which the sanitary thin paper 40a can be taken out is defined between the pair of first window portions 30A and between the pair of second window portions 30B. That is, because no plastic film is used as a component constituting the outlet 31, there is no need to separate the paper and the plastic film when disposing of the box after use.

[0058] Additionally, an outlet 31 through which the sanitary thin paper 40a can be removed is defined between the pair of first window portions 30A and between the pair of second window portions 30B. Because the outlet 31 is provided in this manner, unlike when a slit is provided for removing the sanitary thin paper 40a, the first sheet of sanitary thin paper 40a can be easily picked up and subsequent sheets can be easily removed.

[0059] Additionally, four slits 32a-32d are formed between the first window portion 30A and the second window portion 30B, extending continuously from the outlet 31. As a result, both longitudinal sides of the sanitary thin paper 40a can be locked by the slits 32a-32d on both longitudinal sides, preventing the occurrence of a drop-back state.

[0060] In addition, the window portions 30A, 30B are formed in an arc shape that bulges toward the inside of the opening 22, so that the two slits 32a, 32b on one side in the width direction extend from both longitudinal ends of the outlet 31 toward the outside in the lengthwise direction and the outside in the widthwise direction (one side), and the two slits 32c, 32d on the other side in the width direction extend from both longitudinal ends of the outlet 31 toward the outside in the lengthwise direction and the outside in the widthwise direction (the other side). Here, the stack 40 of sanitary thin papers 40a is V-folded when viewed from the longitudinal direction of the storage box body 20, and is stacked so as to be able to pop up while being alternately sandwiched between the sheets. Therefore, when the sanitary thin papers 40a are pulled out, the sanitary thin papers 40a are either in a state in which they extend from one widthwise side of the stack 40 to the outlet 31, or in a state in which they extend from the other widthwise side to the outlet 31. For this reason, when the sanitary thin paper 40a extends from one widthwise side of the stack 40 to the take-out opening 31, both longitudinal sides of the sanitary thin paper 40a are engaged with the two slits 32c, 32d on the other widthwise side along the two slits 32c, 32d. On the other hand, when the sanitary thin paper 40a extends from the other widthwise side of the stack 40 to the take-out opening 31, both longitudinal sides of the sanitary thin paper 40a are engaged with the two slits 32a, 32b on one widthwise side along the two slits 32a, 32b. In this way, when both longitudinal sides of the sanitary thin paper 40a are engaged by the two slits 32a, 32b (or slits 32c, 32d) on one (or the other) side in the width direction, the central side of the longitudinal direction of the sanitary thin paper 40a is bent inward in the width direction, so that the sanitary thin paper 40a can be held in place and the occurrence of a drop back state can be further prevented.

[0061] Furthermore, when both longitudinal sides of the sanitary thin paper 40a are locked by the two slits 32a, 32b on one side in the width direction, the two slits 32c, 32d on the other side in the width direction can raise the second window portion 30B and the pair of first window portions 30A on the other side in the width direction to support the sanitary thin paper 40a. Therefore, the next sanitary thin paper 40a can be supported in an upright state by the second window portion 30B and the pair of first window portions 30A on the other side (or one side) in the width direction, improving the feel of use and preventing the window portions 30A, 30B from tearing when pulled out.

[0062] In this way, according to this embodiment, a sanitary tissue paper storage box 10 can be provided in which no plastic film is used at the removal opening 31, the first sheet of sanitary tissue paper 40a is easy to pick up, the second sheet and subsequent sheets are also easily removable, the contact area between the sanitary tissue paper 40a and the paper window portions 30A, 30B is small, and the sanitary tissue paper 40a is less likely to drop back.

[0063] Next, a second embodiment of the present invention will be described with reference to the drawings. The sanitary thin paper storage box 50 of this embodiment differs from the first embodiment in the shape of the opening 22A of the top surface 20a, the shape of the pair of first window portions 60A, and the shape of the pair of second window portions 60B. Note that the same components as those of the first embodiment are given the same reference numerals and their description will be omitted.

[0064] Fig. 4 is a perspective view of a storage box for sanitary thin paper according to a second embodiment of the present invention, and Fig. 5 is a plan view of the storage box for sanitary thin paper in Fig. 4.

[0065] (Hygienic tissue paper storage box) 4 and 5, the sanitary thin paper storage box 50 according to this embodiment includes a stack 40 of sanitary thin paper 40a, a storage box body 20 that stores the stack 40, a pair of first window portions 60A, and a pair of second window portions 60B. In the following description, the pair of first window portions 60A and the pair of second window portions 60B may be collectively referred to as "window portions 60A, 60B."

[0066] (opening) The top surface 20a of the storage box body 20 has an opening 22A for pulling out the sanitary thin paper 40a. The opening 22A in this embodiment is formed in a rectangular shape that is long in the longitudinal direction. The opening 22A is located at the center of the longitudinal direction of the top surface 20a and at the center of the lateral direction. The opening 22A may be opened in advance, or may be an opening 22A that is formed (opened) by cutting off the cut piece along the perforation when used, by providing a cut piece on the inside of the opening 22A through a perforation along the edge of the opening 22A. In this embodiment, the shape of the opening 22A is rectangular, but is not limited thereto. For example, the shape of the opening 22A may be elliptical or another shape.

[0067] (Window section) A pair of first paper window portions 60A and a pair of second paper window portions 60B are fixed to the periphery of the opening 22A on the lower surface of the top surface portion 20a. The paper used for the window portions 60A, 60B may be the same as that in the first embodiment. The pair of first window portions 60A and the pair of second window portions 60B may be made of a single sheet of paper that is integrated in an area outside the opening 22A, or may be four sheets of paper that are formed separately from each other.

[0068] The window portions 60A, 60B are fixed to the top surface portion 20a as in the first embodiment and protrude close to each other from both longitudinal and widthwise sides of the top surface portion 20a into the opening 22A. Between the pair of first window portions 60A and between the pair of second window portions 60B, an outlet 61 through which the sanitary thin paper 40a can be taken out is defined. Four slits 62a-62d are formed between the first window portion 60A and the second window portion 60B, extending continuously from the outlet 61. The basis weight and thickness of the window portions 60A, 60B may be the same as those in the first embodiment.

[0069] The window portions 60A, 60B of this embodiment are formed in a trapezoid shape with the edge side of the opening 22A being a lower base longer than the upper base. That is, the window portions 60A, 60B are formed in a trapezoid shape (hereinafter simply referred to as a "trapezoid shape") that protrudes toward the inside of the opening 22A so as to taper. The pair of first window portions 60A are formed symmetrically in the width direction. The pair of second window portions 60B are formed symmetrically in the longitudinal direction. The edges of the pair of first window portions 60A are spaced apart from each other in the longitudinal direction. The edges of the pair of second window portions 60B are spaced apart from each other in the width direction. In this way, the edges of the pair of first window portions 60A are spaced apart from each other in the longitudinal direction, and the edges of the pair of second window portions 60B are spaced apart from each other in the width direction, so that an outlet 61 is defined inside the edges of the pair of first window portions 60A and the edges of the pair of second window portions 60B. In addition, the edges of the first window portion 60A and the second window portion 60B adjacent to each other are spaced apart from each other. In this manner, the edges of the first window portion 60A and the second window portion 60B adjacent to each other are spaced apart from each other, so that four slits 62a to 62d are formed between the first window portion 60A and the second window portion 60B. In this embodiment, the pair of first window portions 60A are formed symmetrically in the width direction, and the pair of second window portions 60B are formed symmetrically in the length direction, but this is not limited to this. For example, at least one of the first window portion 60A and the second window portion 60B may be intentionally formed asymmetrically so that the outlet 61 is located at a position that is shifted in parallel in the width direction or length direction from the position in this embodiment.

[0070] (Outlet) The outlet 61 is an opening for taking out the sanitary thin paper 40a. In this embodiment, the pair of first window portions 60A and the pair of second window portions 60B are formed in a trapezoidal shape. The upper bases of the trapezoidal window portions 60A, 60B define both longitudinal and widthwise sides of the outlet 61. The dimensions of the outlet 61, the relationship between the outlet 61 and the top surface portion 20a, and the relationship between the outlet 61 and the stack 40 may be similar to those of the first embodiment.

[0071] (4 slits) The four slits 62a-62d are gaps for retaining the sanitary thin paper 40a to prevent dropback, and extend from the outlet 61 toward the corners of the rectangular top surface 20a. The two slits 62a, 62b on one side in the width direction extend in a direction inclined with respect to the longitudinal direction from both ends of the outlet 61 in the longitudinal direction toward the outer side in the longitudinal direction and the outer side in the width direction (one side). On the other hand, the two slits 62c, 62d on the other side in the width direction extend in a direction inclined with respect to the longitudinal direction from both ends of the outlet 61 in the longitudinal direction toward the outer side in the longitudinal direction and the outer side in the width direction (the other side). The slit width of the two slits 62a, 62b is preferably shorter than the width direction length Wo2 of the outlet 61.

[0072] In this embodiment, the corners between the upper base and the legs of the trapezoid of the pair of first window portions 60A face the legs of the trapezoid of the adjacent second window portion 60B. Therefore, the slit width of the four slits 62a to 62d gradually narrows in the direction away from the outlet 61 side, becomes closest at the middle portion (the above-mentioned corner of the first window portion 60A), and gradually widens from the closest portion toward the corner side of the top surface portion 20a. Note that the position where the slit widths of the four slits 62a to 62d are closest is not limited to the middle portion, and may be closest on the outlet 61 side or the corner side of the top surface portion 20a.

[0073] In the sanitary tissue paper storage box 50 configured as described above, as in the first embodiment described above, no plastic film is used at the removal opening 61, the first sheet of sanitary tissue paper 40a is easy to pick up, the second sheet and subsequent sheets are also easily removable, the contact area between the sanitary tissue paper 40a and the paper window portions 60A, 60B is small, and furthermore, a sanitary tissue paper storage box 50 can be provided in which the sanitary tissue paper 40a is less likely to drop back.

[0074] 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

[0075] The present invention will be described below with reference to examples, but the present invention is not limited to these examples in any way.

[0076] (Examples 1 to 33 and Comparative Examples 1 to 3) Sanitary thin paper storage boxes of Examples 1 to 33 and Comparative Examples 1 to 3 were produced according to the conditions (parameters) shown in Tables 1 to 3. In Examples 1 to 33 and Comparative Examples 1 to 3, tissue paper was used as the sanitary thin paper, and the tissue paper was folded into a V-shape to be removable in a pop-up manner to form a laminate. Then, the following three evaluations (evaluation of "tissue paper tear resistance," evaluation of "window tear resistance," and evaluation of "drop-back suppression") were performed on each sanitary thin paper storage box. Each parameter was measured according to the above-mentioned standards or measurement methods.

[0077] (Resistance to tearing tissue paper) The evaluation of "tissue paper tear resistance" was a sensory evaluation of the tissue paper's tear resistance when it was taken out, and 30 monitors evaluated the tissue paper's tear resistance using two options: "tissue paper is difficult to tear" or "tissue paper is easy to tear." The evaluation criteria are as follows: Rating 5: More than 29 monitors rated the tissue paper as "hard to tear" Rating 4: Between 27 and 28 monitors rated the tissue paper as "hard to tear" Rating 3: Between 25 and 26 monitors rated the tissue paper as "hard to tear" Rating 2: Between 22 and 24 monitors rated the tissue paper as "hard to tear" Rating 1: Fewer than 21 people rated the tissue paper as "hard to tear"

[0078] (Window tear resistance) The "resistance of the window to breaking" was evaluated by a sensory test of how difficult it was to break the window when the tissue paper was removed, and 30 panelists evaluated the resistance of the window to breaking using the two options "The window is difficult to break" or "The window is easy to break." The evaluation criteria are as follows: Rating 5: More than 29 monitors rated the window as "hard to break." Rating 4: Between 27 and 28 monitors rated the window as "difficult to break" Rating 3: Between 25 and 26 monitors rated the window as "resistant to tearing" Rating 2: 22 to 24 monitors rated the window as "difficult to break" Rating 1: Fewer than 21 people rated the window as "difficult to break"

[0079] (Suppression of dropbacks) The evaluation of "suppression of drop back" was a sensory evaluation of the occurrence of drop back during use of the sanitary tissue paper storage box, and 30 monitors rated the difficulty of drop back using the two options "difficult to drop back" or "easy to drop back." The evaluation criteria are as follows: Rating 5: More than 29 people rated it as "difficult to drop back" Rating 4: 27 to 28 monitors rated it as "difficult to drop back" Rating 3: 25 to 26 monitors rated it as "difficult to drop back" Rating 2: 22 to 24 monitors rated it as "difficult to drop back" Rating 1: Fewer than 21 people rated it as "difficult to drop back"

[0080] The results are shown in Tables 1 to 3.

[0081] [Table 1]

[0082] [Table 2]

[0083] [Table 3]

[0084] From the above, it has been confirmed that the present invention can provide a storage box for sanitary tissue paper which does not use plastic film at the removal opening, is easy to pick up the first sheet of sanitary tissue paper, has good removal properties for the second sheet and subsequent sheets, has a small contact area between the sanitary tissue paper and the paper window, and is less likely to cause the sanitary tissue paper to drop back. [Explanation of symbols]

[0085] 10: Storage box for sanitary tissue paper 20: Storage box body 20a: Top section 22,22A:Aperture 30A, 60A: 1st window part of a pair 30B, 60B: 2nd window part of a pair 31,61: Outlet 32a~32d, 62a~62d: 4 slits 40: Laminate 40a: Sanitary tissue paper

Claims

1. A laminate of sanitary tissue paper; a storage box body having a rectangular top surface portion with an opening formed therein and configured to store the laminate; A pair of first window portions made of paper are fixed to the top surface portion and protrude into the opening from both sides in a longitudinal direction of the top surface portion so as to be close to each other; a pair of second window portions made of paper that are fixed to the top surface portion and protrude into the opening from both sides in a width direction intersecting the longitudinal direction of the top surface portion so as to be close to each other; the pair of first window portions and the pair of second window portions are formed in a trapezoidal shape that protrudes so as to taper toward the inside of the opening, or in an arc shape that bulges toward the inside of the opening, Between the pair of first window portions and between the pair of second window portions, an outlet through which the sanitary thin paper can be taken out is defined, Between the first window portion and the second window portion, four slits are formed continuously extending from the outlet. A storage box for sanitary tissue paper, characterized in that

2. The value represented by the formula: (the length of the opening in the width direction)÷(the length of the top surface portion in the width direction) is 0.42 or more and 0.89 or less.

2. The sanitary tissue paper storage box according to claim 1 .

3. The value represented by the formula: (length of the outlet in the width direction)÷(length of the top surface portion in the width direction) is 0.04 or more and 0.55 or less.

3. The storage box for sanitary tissue paper according to claim 1 or 2.

4. The value represented by the formula: (length of the outlet in the longitudinal direction)÷(length of the laminate in the longitudinal direction) is 0.18 or more and 0.48 or less.

3. The storage box for sanitary tissue paper according to claim 1 or 2.

5. The length of the opening in the width direction is 50 mm or more and 98 mm or less, The length of the top surface portion in the width direction is 100 mm or more and 130 mm or less, The length of the outlet in the width direction is 5 mm or more and 60 mm or less.

3. The storage box for sanitary tissue paper according to claim 1 or 2.

6. The length of the outlet in the longitudinal direction is 40 mm or more and 100 mm or less, The length of the laminate in the longitudinal direction is 185 mm or more and 240 mm or less.

3. The storage box for sanitary tissue paper according to claim 1 or 2.

7. The pair of first window portions and the pair of second window portions have a basis weight of 30 g / m ２ 90g / m or more ２ is less than or equal to 3. The storage box for sanitary tissue paper according to claim 1 or 2.

8. The pair of first window portions and the pair of second window portions have a thickness of 30 μm or more and 120 μm or less.

3. The storage box for sanitary tissue paper according to claim 1 or 2.

9. The basis weight of the base material constituting the storage box body is 270 g / m ２ More than 400g / m ２ is less than or equal to 3. The storage box for sanitary tissue paper according to claim 1 or 2.

10. The thickness of the base material constituting the storage box body is 300 μm or more and 450 μm or less.

3. The storage box for sanitary tissue paper according to claim 1 or 2.

11. The basis weight of the sanitary thin paper per product ply is 18 g / m ２ 32g / m or more ２ is less than or equal to 3. The storage box for sanitary tissue paper according to claim 1 or 2.

12. The tensile strength DMDT per product ply in the MD direction when dry based on JIS P 8113 of the sanitary thin paper is 220 cN / 25 mm or more and 490 cN / 25 mm or less.

3. The storage box for sanitary tissue paper according to claim 1 or 2.

13. The tensile strength (DCDT) of the sanitary thin paper in the CD direction when dry based on JIS P 8113 is 60 cN / 25 mm or more and 200 cN / 25 mm or less.

3. The storage box for sanitary tissue paper according to claim 1 or 2.

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