Sanitary tissue paper storage box

Abstract

To provide a sanitary tissue paper storage box which has good sanitary tissue paper taking-out performance, and into which dust is hard to enter.SOLUTION: A sanitary tissue paper storage box has sanitary tissue papers 20 in a storage box 11, and does not have a film at a take-out port 13 of the storage box 11. The number of sets of sanitary tissue papers 20 is 60 sets or more and 160 sets or less, a basis weight of the storage box 11 is 200 g / m2 or more and 450 g / m2 or less, a height of the storage box 11 is 35 mm or more and 76 mm or less, a length orthogonal to a longer direction at a midship part of the take-out port 13 is 30 mm or more and 65 mm or less, a length orthogonal to the longer direction at both end parts of the take-out port 13 is 8 mm or more and 40 mm or less, the length orthogonal to the longer direction at the midship part of the take-out port 13 is larger than the length orthogonal to the longer direction at both end parts of the take-out port 13, and a length ratio of the length in the longer direction of the take-out port 13 to the length orthogonal to a pull-out direction of the sanitary tissue paper 20 is 60% or more and 103% or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] In recent years, storage boxes containing sanitary thin paper such as tissue paper have been made lighter and more compact. For producers, this allows for a reduction in the production costs of storage boxes and the costs of transporting products, and for consumers, this simplifies the process of carrying purchased products home and reduces the storage space required at home. Many tissue paper storage boxes have a film at the opening, but because waste separation requires that the film be removed from the storage box and discarded, in recent years, the opening has become filmless (see Patent Documents 1 to 3). Such storage boxes are also called filmless cartons. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-53176 A [Patent Document 2] JP 2009-102078 A [Patent Document 3] JP 2010-13181 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, with filmless cartons, when the sanitary tissue paper is pulled out, the edge of the opening rubs directly against the sanitary tissue paper, resulting in higher resistance to removal and inferior ease of removal compared to storage boxes that use film. Lengthening the long side of the opening improves the ease of removal, but the sanitary tissue paper cannot stand on its own and is more likely to drop back (the phenomenon of the tissue paper falling into the box). Also, if the short side is too long, it is easy for garbage to get in, and if it is narrow, it is difficult to pick up the first set. Furthermore, if the basis weight of the filmless carton is too high, the sanitary tissue paper will catch too much when removed, making it more likely to tear, and making removal difficult. Conversely, if the basis weight is too low, the strength of the carton will decrease, the opening will be more likely to bend, and removal will be poor. As such, it has been difficult for conventional filmless cartons to satisfy all of the requirements for ease of removal, resistance to garbage getting in, and ease of picking.

[0005] The present invention has been made in consideration of the above circumstances, and aims to provide a filmless storage box containing sanitary tissue paper, which allows easy removal of the sanitary tissue paper and prevents dust from getting into the carton. [Means for solving the problem]

[0006] The present invention relates to a sanitary tissue paper-containing storage box having sanitary tissue paper inside and no film at the opening of the storage box, the number of sets of sanitary tissue paper being 60 sets or more and 160 sets or less, and the basis weight of the storage box being 200 g / m 2 More than 450g / m 2 the height of the storage box is 35 mm or more and 76 mm or less, the length of the outlet in the direction perpendicular to the longitudinal direction at the longitudinal center of the outlet is 30 mm or more and 65 mm or less, the lengths of the outlet in the direction perpendicular to the longitudinal direction at both longitudinal ends of the outlet are 8 mm or more and 40 mm or less, the length of the outlet in the direction perpendicular to the longitudinal direction at the longitudinal center of the outlet is greater than the length of the outlet in the direction perpendicular to the longitudinal direction at both longitudinal ends of the outlet, The value represented by the following formula (1) is 60% or more and 103% or less in this storage box containing sanitary tissue paper. Length of the outlet in the longitudinal direction (mm) / Length perpendicular to the direction in which the sanitary tissue paper is pulled out (mm) × 100 (1)

[0007] It is preferable that the length of the sanitary thin paper in the direction in which it is pulled out is 150 mm or more and 240 mm or less, and the length of the sanitary thin paper in a direction perpendicular to the direction in which it is pulled out is 160 mm or more and 260 mm or less.

[0008] The value represented by the following formula (2) is preferably 10% or more and 40% or less. Height of storage box (mm) / Length of sanitary tissue paper in the pull-out direction (mm) × 100 (2)

[0009] The value represented by the following formula (3) is preferably 28 or more and 76 or less. (Height of storage box (mm) / Number of sets of sanitary tissue paper) x 100...(3)

[0010] The value represented by the following formula (4) is preferably 7 or more and 20 or less. (Number of sets of sanitary tissue paper × thickness of sanitary tissue paper (μm) / 1000 / height of storage box (mm)) × 100...(4)

[0011] It is preferable that the sanitary tissue paper is a two-ply hand towel, the pull-out direction of the sanitary tissue paper is the CD direction, the cross section of the sanitary tissue paper is V-folded, and the sanitary tissue paper is pulled out in a pop-up style.

[0012] A lid is provided at the opening, and the lid is surrounded by perforations for opening that follow the shape of the opening, and it is preferable that the lid has a push-in piece for opening in the center.

[0013] It is preferable that the push-in piece is semi-elliptical, the length in the longitudinal direction of the outlet is 10 mm or more and 30 mm or less, and the length in the direction perpendicular to the longitudinal direction of the outlet is 14 mm or more and 30 mm or less.

[0014] The radius of curvature of the pushing piece is preferably 7 mm or more and 15 mm or less.

[0015] The opening area of ​​the opening formed by tearing the opening perforation on the lid is 2000 mm 2 More than 7000mm2 It is preferable that:

[0016] The opening area is preferably 5% to 30% of the area of ​​the top surface of the storage box.

[0017] The value represented by the following formula (5) is preferably 3.0 or more and 5.0 or less. (Tensile strength of sanitary tissue paper in the direction of pulling (N / 25mm) × length of the outlet in the longitudinal direction (mm) / length of sanitary tissue paper in the direction perpendicular to the pulling direction (mm)) (5) Effect of the Invention

[0018] According to the present invention, it is possible to provide a filmless storage box containing sanitary tissue paper, which allows easy removal of the sanitary tissue paper and prevents dirt from getting inside the storage box. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a perspective view showing one embodiment of a storage box for sanitary tissue paper of the present invention. [Diagram 2] This is a plan view of the top surface of a storage box containing sanitary tissue paper with the lid removed. [Diagram 3] 1 is a perspective view showing the state in which tissue paper has been removed from the storage box. [Figure 4] FIG. 2 is a plan view of the top surface of a storage box according to the present invention. [Diagram 5] FIG. 2 is a plan view of the sanitary tissue paper. [Figure 6] 5 is a cross-sectional view taken along the line YY in FIG. 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the preferred embodiments of the present invention, the same elements are designated by the same reference numerals.

[0021] [Hygienic tissue paper storage box] As shown in Figure 1, a storage box 10 containing sanitary tissue paper of the present invention has sanitary tissue paper 20 inside the storage box 11, and has no film at the removal opening 13. The sanitary tissue paper 20 is pulled out in the direction of the arrow as shown in Figure 3. In this specification, the sanitary tissue paper 20 is folded at fold line 21 in Figure 5 and stored in storage box 11 as shown in Figure 6. For this reason, the pulling direction of the sanitary tissue paper 20 is the direction of the upward arrow in Figure 5, and the direction perpendicular to the pulling direction corresponds to the X direction of the storage box 11.

[0022] (Storage box) The storage box 11 in the sanitary tissue paper-containing storage box 10 of the present invention is a rectangular parallelepiped made of paper. -Storage box size- As shown in FIG. 1, the height H of the storage box 11 C The height Hc (Z direction in FIG. 1) is 35 mm or more and 76 mm or less. The height Hc is preferably 35 mm or more and 64 mm or less, and more preferably 35 mm or more and 58 mm or less. In addition, the length L of the storage box 11 in the longitudinal direction C The length (X direction in FIG. 1) is preferably 160 mm or more and 250 mm or less, more preferably 180 mm or more and 240 mm or less, and further preferably 200 mm or more and 230 mm or less. In addition, the length W of the storage box 11 in the direction perpendicular to the longitudinal direction C (Y direction in FIG. 1, hereinafter this direction may be referred to as the short direction) is preferably 95 mm or more and 125 mm or less, more preferably 100 mm or more and 120 mm or less, and even more preferably 105 mm or more and 115 mm or less. Longitudinal length L C and the short side length W C The preferred combination of the longitudinal length L C is 160 mm or more and 250 mm or less, and the short side length W C is between 95mm and 125mm. By making the storage box 11 within the above-mentioned size range, the sanitary thin paper 20 can be easily removed even from the filmless storage box 11.

[0023] -Basic weight- The basis weight of the storage box 11 is 200 g / m 2 More than 450g / m 2 Less than 240g / m 2 More than 400g / m 2 It is preferable that the thickness is less than 270 g / m 2 More than 350g / m 2 It is more preferable that the basis weight of the storage box 11 is 200 g / m or less. 2 By virtue of the above, the sanitary thin paper 20 can be easily taken out, and the thickness of the thin paper is 450 g / m 2 This reduces the tendency of the sanitary thin paper 20 to tear. In addition, the strength of the storage box 11 can be maintained to make the storage box 11 less prone to crushing, and the ease of forming the storage box 11 is also maintained. In addition, the box manufacturability refers to the ease of erecting the storage box 11 when it is folded in half and transformed into a rectangular cylindrical body, and the ease of sealing the opening when folding the short side flaps and the height side flaps together when storing (filling) the stack of sanitary thin paper 20 into the storage box 11 after erection. The basis weight of the storage box 11 is a value measured based on JIS P 8124.

[0024] (Extraction port) 2, the take-out opening 13 of this embodiment has a substantially elliptical central portion 14 and longitudinal openings extending to both sides thereof, with the longitudinal opening having both ends 15. The take-out opening 13 is formed by tearing open a perforation 12 (see FIG. 4) described later.

[0025] Here, the "central portion" of the outlet 13 in the longitudinal direction refers to a region that is 45% to 55% of the length in the longitudinal direction, including the center in the longitudinal direction. Moreover, the "both ends" in the longitudinal direction of outlet 13 refer to areas of 0% to 15% from end 15a of the longitudinal opening.

[0026] The shape of the central portion 14 can be various shapes such as a substantially circular shape, a substantially elliptical shape, a substantially rectangular shape, etc., but in consideration of ease of removal, a substantially circular shape or a substantially elliptical shape is preferable. The longitudinal openings other than the central portion 14 preferably extend in the longitudinal direction of the storage box 11 and have R-shaped ends as shown in Fig. 2. The longitudinal openings may be provided with a constant width in the longitudinal direction as shown in Fig. 2, or may be provided so as to gradually increase in width toward the central portion 14.

[0027] The sanitary tissue paper-containing storage box 10 of the present invention has a length W in a direction perpendicular to the longitudinal direction (Y direction) at the longitudinal center portion 14 of the take-out opening 13. 14 is the length W of the outlet 13 in the direction perpendicular to the longitudinal direction at both ends 15 of the outlet 13 in the longitudinal direction. 15 The length W of the central part 14 14 However, the length W of both ends 15 15 The larger size has the advantage that the first set is easier to pick up in the central portion 14, and the second and subsequent sets are easier to support the sanitary thin paper 20 without dropping back.

[0028] Length W of the outlet 13 in the direction perpendicular to the longitudinal direction at the central portion 14 in the longitudinal direction 14 is 30mm or more and 65mm or less. 14 The length W of the central portion 14 in the direction perpendicular to the longitudinal direction is preferably 35 mm or more and 60 mm or less, and more preferably 40 mm or more and 55 mm or less. 14 However, by making the distance 30 mm or more, it is easy to pick up the first set of sanitary thin paper 20, and by making the distance 65 mm or less, it is possible to prevent the intrusion of dirt. In addition, W 14 indicates the area maximum in the central portion 14.

[0029] The length W of the outlet 13 in the direction perpendicular to the longitudinal direction at both ends 15 in the longitudinal direction 15 is 8 mm or more and 40 mm or less. 15 The length W of the both ends 15 in the direction perpendicular to the longitudinal direction is preferably 10 mm or more and 30 mm or less, and more preferably 12 mm or more and 20 mm or less. 15However, by setting the thickness to 8 mm or more, the sanitary thin paper 20 can be easily pulled out, and by setting the thickness to 40 mm or less, the sanitary thin paper 20 can be prevented from dropping back. In addition, W 15 indicates the area maximum at both ends 15.

[0030] Length L of outlet 13 in the longitudinal direction (X direction) 13 The length L of the outlet 13 in the longitudinal direction is preferably 135 mm or more and 220 mm or less, more preferably 155 mm or more and 215 mm or less, and even more preferably 165 mm or more and 210 mm or less. 13 However, if the length is 135 mm or more, the sanitary thin paper 20 can be easily pulled out, and if the length is 220 mm or less, drop back can be prevented.

[0031] The opening area of ​​the outlet 13 is 2000 mm 2 More than 7000mm 2 It is preferable that the length is less than 3000 mm. 2 More than 6000mm 2 More preferably, it is 3500 mm or less. 2 More than 5000mm 2 It is more preferable that the opening area of ​​the outlet 13 is 2000 mm or less. 2 By this, the sanitary thin paper 20 can be easily taken out. 2 By keeping it below this size, it becomes difficult for dirt to get in. The opening area can be measured as follows. First, as shown in Fig. 4, the mass and area of ​​only the top surface 11a of the storage box 10 with the lid 16 attached are measured. Next, the lid 16 is removed along the opening perforation 12, and the mass of only the lid 16 is measured. The opening area is calculated from the ratio of the two masses. The opening area of ​​the removal opening 13 is preferably 5% to 30% of the area of ​​the top surface 11a of the storage box 11, more preferably 10% to 25%, and even more preferably 15% to 20%.

[0032] The length (L 20 , see FIG. 1) 13 The ratio of (see FIG. 2) is represented by the following formula (1) and is preferably 60% or more and 103% or less, more preferably 70% or more and 99% or less, and even more preferably 80% or more and 94% or less. Length of the outlet in the longitudinal direction (mm) / Length perpendicular to the direction in which the sanitary tissue paper is pulled out (mm) × 100 (1) When the ratio calculated by the above formula (1) is 60% or more, the sanitary thin paper 20 can be removed without tearing, and when the ratio is 103% or less, drop back of the sanitary thin paper 20 can be prevented.

[0033] -Lid part- As shown in Fig. 4, the sanitary tissue paper-containing storage box 10 of the present invention preferably has a lid 16 provided at the opening 13, and the lid 16 is preferably surrounded by an opening perforation 12 that conforms to the shape of the opening 13. The opening perforation does not necessarily have to surround a portion of the lid 16, but it is preferable that the entire lid 16 is surrounded by the opening perforation.

[0034] It is also preferable to have a push-in piece 17 for opening in the center of the lid portion 16. The shape of the push-in piece 17 in the center can be various shapes, but is preferably approximately semicircular or approximately semi-elliptical, and more preferably approximately semi-elliptical. The length L of the pushing piece 17 in the longitudinal direction 17 The length L of the push-in piece 17 in the longitudinal direction is preferably 10 mm or more and 30 mm or less, more preferably 10 mm or more and 22 mm or less, and even more preferably 10 mm or more and 16 mm or less. 17 However, by making the distance 10 mm or more, when the pushing piece 17 is pushed, the upper part of the stack is pushed and an appropriate space is created, making it easy to pick up the first set. By making the distance 30 mm or less, the pushing piece 17 is easy to push, the lid portion 16 can be opened cleanly, and the sanitary thin paper 20 can be easily removed.

[0035] Length W of the pushing piece 17 in a direction perpendicular to the longitudinal direction 17 The length W in the direction perpendicular to the longitudinal direction is preferably 14 mm or more and 30 mm or less, more preferably 16 mm or more and 26 mm or less, and even more preferably 18 mm or more and 22 mm or less. 17 However, by making the distance 14 mm or more, it becomes easier to push in the pushing piece 17. By making the distance 30 mm or less, it becomes easier to push in the pushing piece 17, the lid portion 16 can be opened neatly, and the sanitary thin paper 20 can be easily removed.

[0036] It is preferable that the pushing piece 17 has a folding line 19 provided at a portion equivalent to the diameter of the approximate semi-ellipse, and the arc portion of the semi-circle is formed by the opening perforation 18. When the opening perforation 18 is torn open and the pushing piece 17 is pushed in, the pushing piece 17 is folded at the folding line 19 toward the inside of the storage box 11, forming a hole. The lid portion 16 can be removed by inserting a finger into the hole and pulling up the lid portion 16 while dividing it into left and right parts from the center to open the opening perforation 12. Here, "the center of the lid portion 16" refers to the position where the push-in piece 17 is formed so that the folding line 19 on the push-in piece 17 is at a position that bisects the central portion 14 of the removal opening 13 in the longitudinal direction.

[0037] The radius of curvature of the pushing piece 17 is preferably 7 mm or more and 15 mm or less, more preferably 8 mm or more and 13 mm or less, and further preferably 9 mm or more and 11 mm or less.

[0038] (hygienic tissue paper) The sanitary thin paper 20 of the present invention will be described in detail below.

[0039] -Number of sets- The number of sets of sanitary thin paper 20 stored in the sanitary thin paper storage box 10 of the present invention is 60 to 160 sets. The number of sets is more preferably 70 to 140 sets, and even more preferably 80 to 120 sets. One set of the sanitary thin paper 20 may be 1 to 3 plies, and 2 plies is preferred.

[0040] -Paper thickness- The thickness of the sanitary thin paper 20 is preferably 43 μm to 100 μm per ply, more preferably 48 μm to 85 μm, and even more preferably 53 μm to 70 μm. In addition, it is preferable that one set of the sanitary thin paper 20 is two plies.

[0041] The paper thickness is a value measured by the following method. The device used is a thickness gauge (Ozaki Manufacturing's "PEACOCK" dial thickness gauge). The measurement conditions are a measurement load of 250gf and a gauge head diameter of 30mm. 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 1mm per second or less. One measurement is performed with 10 sheets of 1 ply (5 sets of 2 ply sheets) stacked together, and the measurement is repeated 10 times to average the measurement results, and then the value is divided by 10 to obtain the value per ply.

[0042] The length W of the sanitary thin paper 20 in the pull-out direction is represented by the following formula (2). 20 The ratio of the height Hc of the storage box 11 to the total height (see FIG. 5) is preferably 10% to 40%, more preferably 14% to 34%, and even more preferably 18% to 28%. Height of storage box (mm) / Length of sanitary tissue paper in the pull-out direction (mm) × 100 (2) Length W of sanitary tissue paper 20 in the pull-out direction 20 When the ratio of the height Hc of the storage box 11 to the total height Hc is 10% or more, the ease of pulling out the sanitary thin paper 20 is improved, and when it is 40% or less, the sanitary thin paper 20 can be prevented from dropping back.

[0043] The ratio of the height Hc of the storage box 11 to the number of sets of sanitary thin paper 20, represented by the following formula (3), is preferably 28 or more and 76 or less, more preferably 32 or more and 64 or less, and even more preferably 36 or more and 56 or less. (Height of storage box (mm) / Number of sets of sanitary tissue paper) x 100...(3) When the ratio of the height Hc of the storage box 11 to the number of sets of sanitary tissue paper 20 is 28 or more, the ease of pulling out the sanitary tissue paper 20 is improved, and when it is 76 or less, the upper space is appropriately free, making it easy to pick up the first set.

[0044] In addition, in relation to the storage box 11, the value represented by the following formula (4) of the sanitary thin paper 20 is preferably 7 or more and 20 or less, more preferably 9 or more and 18 or less, and even more preferably 11 or more and 16 or less. (Number of sets of sanitary tissue paper × thickness of sanitary tissue paper (μm) / 1000 / height of storage box (mm)) × 100 (4) The thickness of sanitary thin paper indicates the thickness per ply. When the value obtained by the above formula (4) is 7 or more, the upper space is appropriately open, making it easy to pick up the first set of sanitary tissue paper 20, and when it is 20 or less, the pressure applied to the sanitary tissue paper 20 from the top surface 11a of the storage box 11 is small, so the sanitary tissue paper 20 can be removed smoothly without tearing.

[0045] -Basic weight- The basis weight per ply of the sanitary thin paper 20 is 14 g / m 2 More than 22g / m 2 It is preferable that the thickness is less than 15 g / m 2 More than 20g / m 2 More preferably, it is 16 g / m or less. 2 More than 18g / m 2 It is more preferable that the basis weight is not more than 100 g / m2.

[0046] By setting the paper thickness and basis weight per ply of the sanitary thin paper 20 within the above ranges, the sanitary thin paper 20 is less likely to tear and is easier to remove from the storage box 11. In addition, softness, volume, and the compactness of the storage box 11 can be achieved at the same time. The sanitary thin paper 20 may be coated with a chemical solution, and if coated, the basis weight and paper thickness refer to the coated state. It is preferable that the sanitary thin paper of the present application is not coated with a chemical solution.

[0047] The sanitary thin paper 20 stored in the storage box 11 is a two-ply hand towel, and the pull-out direction of the sanitary thin paper 20 is preferably the CD (Cross Direction). The sanitary thin paper 20 is preferably processed in a multi-stand type interfolder. When processed in a multi-stand type interfolder, the pull-out direction is the CD. Moreover, as shown in FIG. 6, the sanitary thin paper 20 in the storage box 11 is folded in a V-shape in cross section when viewed from the short side direction of the storage box 11, and it is preferable that the paper be taken out in a pop-up manner.

[0048] - Length W of sanitary tissue paper in the pull-out direction 20 - Length W of sanitary tissue paper 20 in the pull-out direction 20 (see FIG. 5) is preferably 150 mm or more and 240 mm or less, more preferably 170 mm or more and 230 mm or less, and even more preferably 190 mm or more and 210 mm or less.

[0049] -Length L of the sanitary tissue paper in the direction perpendicular to the pull-out direction 20 - Length L in the direction perpendicular to the pull-out direction of the sanitary thin paper 20 (X direction) 20 (See Figs. 1 and 5) is preferably 160 mm or more and 260 mm or less, more preferably 180 mm or more and 240 mm or less, and further preferably 200 mm or more and 220 mm or less.

[0050] Sanitary tissue paper 20 length L 20 and W 20 By setting the above range, the height H without the film of the present invention can be c The sanitary thin paper-containing storage box obtained by inserting a laminate of the sanitary thin paper 20 of the present invention into a storage box 11 having the above structure has good drawability.

[0051] -Strength in the direction perpendicular to the pull direction (DMDT)- The sanitary thin paper 20 in the present invention has a dry machine direction tensile strength (DMDT) based on JIS P 8113 (measured with 2 plies and a tensile speed of 300 mm / min) of preferably 6 N / 25 mm to 28 N / 25 mm, more preferably 9 N / 25 mm to 25 N / 25 mm, and even more preferably 12 N / 25 mm to 22 N / 25 mm. By setting the DMDT within the above range, the sanitary thin paper 20 is less likely to tear and is easier to take out when removed from the storage box 11, making it easier to use. In addition, the sanitary thin paper 20 is less likely to tear in the machine direction (MD) during production.

[0052] -Strength in the pull-out direction (DCDT)- The sanitary thin paper 20 of the present invention is pulled out in the CD direction, and the dry cross direction tensile strength (DCDT) based on JIS P 8113 (measured with 2 plies and a pulling speed of 300 mm / min) is preferably 3.3 N / 25 mm or more and 6.3 N / 25 mm or less, more preferably 3.8 N / 25 mm or more and 5.8 N / 25 mm or less, and even more preferably 4.3 N / 25 mm or more and 5.3 N / 25 mm or less. By setting the DCDT within the above range, the sanitary thin paper 20 is less likely to tear when pulled out and is easier to take out, making it easier to use.

[0053] Tensile strength (DCDT) of the sanitary thin paper 20 in the pull-out direction, and the longitudinal length L of the take-out opening 13 13 , and the length L in the direction perpendicular to the pull-out direction of the sanitary thin paper 20 (X direction) 20 In this relationship, the value represented by the following formula (5) is preferably 3.0 or more and 5.0 or less, more preferably 3.4 or more and 4.8 or less, and even more preferably 4.0 or more and 4.5 or less. (Tensile strength of sanitary tissue paper in the direction of pulling (N / 25mm) × length of the outlet in the longitudinal direction (mm) / length of sanitary tissue paper in the direction perpendicular to the pulling direction (mm)) (5) When the value represented by the above formula (5) is 3.0 or more, the sanitary thin paper 20 is less likely to tear, and when it is 5.0 or less, the sanitary thin paper 20 is less likely to drop back.

[0054] -Raw materials- The two-ply sheet constituting the sanitary thin paper 20 is mainly composed of pulp, and preferably contains 50% or more by mass of pulp, more preferably contains 70% or more by mass of pulp, and even more preferably contains 90% or more by mass of pulp. Pulp that can be used in the production of the thin paper 20 includes wood pulp, recycled paper pulp, and non-wood pulp, but the sanitary thin paper 20 of the present invention may be made of 100% wood pulp as pulp, or may contain recycled paper pulp and non-wood pulp in addition to wood pulp. Examples of components other than pulp include fillers, synthetic fibers, and natural fibers. In order to obtain the target quality, it is preferable to use as the raw material a wood pulp consisting of 10% by mass or more and 50% by mass or less of softwood bleached kraft pulp (NBKP) and 50% by mass or more and 90% by mass or less of hardwood bleached kraft pulp (LBKP), it is more preferable to use as the raw material a wood pulp consisting of 15% by mass or more and 45% by mass or less of NBKP and 55% by mass or more and 85% by mass or less of LBKP, and it is even more preferable to use as the raw material a wood pulp consisting of 20% by mass or more and 40% by mass or less of NBKP and 60% by mass or more and 80% by mass or less of LBKP.

[0055] The wood species of the LBKP is preferably pulp produced from Eucalyptus genus of the Myrtaceae family, represented by Eucalyptus grandis and Eucalyptus globulus. In addition to the wood pulp having the above pulp ratio, recycled paper pulp may be included, and the amount of recycled paper pulp is preferably 200 parts by mass or less, more preferably 150 parts by mass or less, and even more preferably 100 parts by mass or less, per 100 parts by mass of wood pulp having the above pulp ratio. The recycled paper pulp is preferably derived from paper liquid beverage containers such as milk.

[0056] In order to ensure that the sanitary thin paper 20 has an appropriate strength, the strength can be adjusted by beating the pulp fibers after the raw materials are blended by normal means. For the beating process to obtain the target quality, the freeness (csf) of the seed box raw material is preferably 200ml to 650ml, more preferably 250ml to 600ml, and even more preferably 300ml to 550ml. A dry strength enhancer may be used, and a wet strength enhancer is preferably used. By adjusting the pulp composition and freeness as described above, a sanitary thin paper with appropriate strength and easy to pull out can be obtained for a carton that does not have a film as in the present application. EXAMPLES

[0057] [Examples and Comparative Examples] A storage box containing sanitary tissue paper with a lid shape shown in Figure 4 was manufactured using the filmless storage box shown in Tables 1 to 3 and sanitary tissue paper (hand towels, no chemical solution). The sanitary tissue paper was processed in a multi-stand type interfolder so that the pull-out direction was in the CD direction. The hand towels were stored in a set of 2 plies in a pop-up style in the storage box as shown in Figure 6.

[0058] [evaluation] The storage boxes containing sanitary tissue paper of the Examples and Comparative Examples were subjected to sensory evaluation for the following items. (Ease of picking up the first set of sanitary tissue paper) Based on the evaluations of 30 monitors, the ease of gripping the first set of hand towels was evaluated according to the following criteria. 5: 0 to 1 people found the first set difficult to pick up (remove) 4: The first group of 2 to 3 people found it difficult to pick up (take out). 3: The first group of 4 to 6 people found it difficult to pick up (take out) 2: The number of people who found it difficult to pick up (take out) in the first group was between 7 and 20. 1: The number of people who found it difficult to pick up (take out) in the first group was 21 to 30.

[0059] (Ease of pulling out sanitary tissue paper from the second set onwards) Thirty test subjects evaluated the ease of pulling out the second and subsequent sets of hand towels using the following evaluation criteria, and the average of the evaluation values ​​was calculated. The average value was rounded off to one significant digit. 5: The sanitary tissue paper did not tear even after being used to the end. Also, it was not difficult to pull out. 4: When used to the end, each storage box was torn once or twice. Or, it was almost difficult to pull out. 3: When used to the end, each storage box was torn 3 to 5 times. Or, it was difficult to pull out, but there was no problem. 2: When used to the end, each storage box was torn 6 to 10 times. Or, it was difficult to pull out. 1: When used to the end, each storage box was torn 11 or more times. Or, it was noticeably difficult to pull out.

[0060] (Drop Back) Thirty test subjects performed the pull-out operation for one storage box up to the last set, and evaluated it based on the following evaluation criteria, and the average evaluation value was calculated. The average value was rounded off to one significant digit. 5: No dropbacks occurred 4: One dropback occurred 3: Drop backs occurred 2-3 times 2: Drop backs occurred 4-6 times 1: Seven or more dropbacks occurred

[0061] (Difficulty in getting garbage in) Based on the evaluations of 30 monitors, the hand towels were evaluated based on the following criteria in terms of how well they prevent debris from getting into the storage box when in use. Good: 0 to 3 people felt that it was easy for garbage to get in. Acceptable: 4 to 6 people feel that it is easy for garbage to get in. Not acceptable: 7-30 people feel that it is easy for garbage to get in

[0062] [Table 1]

[0063] [Table 2]

[0064] [Table 3]

[0065] As shown in Table 1, the storage box containing sanitary tissue paper of the present invention achieved good results in evaluations of the ease of picking up the first set of sanitary tissue paper, the ease of pulling out the second set and subsequent sets, the resistance to drop back, and the resistance to dirt getting in. [Explanation of symbols]

[0066] 10. Sanitary tissue paper storage box 11 Storage Box 11a Top 12 (lid) opening perforation 13. Extraction port 14 Longitudinal center of outlet 15 Both ends of the outlet in the longitudinal direction 15a end 16 Lid 17 Push-in piece 18 (Push-in piece) opening perforation 19 Folding lines 20 Sanitary tissue paper 21 Fold lines H C Storage box height X Longitudinal direction Y: Orthogonal to the longitudinal direction L 13 Length of outlet in longitudinal direction W 14 Length perpendicular to the longitudinal direction at the center of the outlet W 15 Length of the outlet in the direction perpendicular to the longitudinal direction at both ends of the outlet L17 Longitudinal length of the push piece W 17 Length of the push piece perpendicular to the longitudinal direction W 20 Length of sanitary tissue paper in the pull-out direction L 20 Length of sanitary tissue paper in the direction perpendicular to the pull-out direction

Claims

1. A storage box containing sanitary tissue paper, the storage box having sanitary tissue paper inside and no film at the opening of the storage box, The number of sets of the sanitary thin paper is 60 sets or more and 160 sets or less, The storage box has a basis weight of 200 g / m ２ 450g / m or more ２ The height of the storage box is 35 mm or more and 76 mm or less, The length of the outlet in a direction perpendicular to the longitudinal direction at the longitudinal center portion is 30 mm or more and 65 mm or less, The length of the outlet in a direction perpendicular to the longitudinal direction at both ends of the outlet is 8 mm or more and 40 mm or less, a length of the outlet in a direction perpendicular to the longitudinal direction at a central portion in the longitudinal direction is greater than a length of the outlet in a direction perpendicular to the longitudinal direction at both ends in the longitudinal direction; The value represented by the following formula (1) is 60% or more and 103% or less, A lid portion is provided at the take-out opening, the lid portion is surrounded by an opening perforation that follows the shape of the take-out opening, and has a push-in piece for opening at the center of the lid portion; The opening area of ​​the outlet formed by tearing the opening perforation of the lid is 2000 mm ２ More than 7000mm ２ is as follows: The pushing piece is semi-elliptical, the length of the pushing piece in the longitudinal direction is 10 mm or more and 30 mm or less, and the length of the pushing piece in the direction perpendicular to the longitudinal direction is 14 mm or more and 30 mm or less, The storage box containing sanitary thin paper has a curved portion of the push-in piece with an R of 7 mm or more and 15 mm or less. The longitudinal length of the take-out opening (mm) / the length in the direction perpendicular to the pull-out direction of the sanitary thin paper (mm) × 100 ... (1)

2. A storage box containing sanitary tissue paper as described in claim 1, wherein the length of the sanitary tissue paper in the pull-out direction is 150 mm or more and 240 mm or less, and the length of the sanitary tissue paper in a direction perpendicular to the pull-out direction is 160 mm or more and 260 mm or less.

3. The sanitary tissue paper-containing storage box according to claim 1 or 2, wherein the value represented by the following formula (2) is 10% or more and 40% or less. Height of the storage box (mm) / Length of the sanitary thin paper in the pull-out direction (mm) × 100 ... (2)

4. The storage box containing sanitary tissue paper according to any one of claims 1 to 3, wherein the value represented by the following formula (3) is 28 or more and 76 or less. (Height of the storage box (mm) / Number of sets of sanitary thin paper) × 100 ... (3)

5. The storage box containing sanitary tissue paper according to any one of claims 1 to 4, wherein the value represented by the following formula (4) is 7 or more and 20 or less. (Number of sets of sanitary thin paper × thickness of sanitary thin paper (μm) / 1000 / height of the storage box (mm)) × 100 ... (4)

6. A storage box containing sanitary tissue paper as described in any one of claims 1 to 5, wherein the sanitary tissue paper is a two-ply hand towel, the pull-out direction of the sanitary tissue paper is the CD direction, the sanitary tissue paper has a V-shaped cross section, and is pulled out in a pop-up style.

7. 2. The sanitary tissue paper-containing storage box according to claim 1, wherein the opening area is 5% to 30% of the area of ​​the top surface of the storage box.

8. The storage box containing sanitary tissue paper according to any one of claims 1 to 7, wherein the value represented by the following formula (5) is 3.0 or more and 5.0 or less. (Tensile strength of the sanitary thin paper in the pulling direction (N / 25 mm) × length of the outlet in the longitudinal direction (mm) / length of the sanitary thin paper in the direction perpendicular to the pulling direction (mm)) ... (5)

Images