Packaging

Abstract

To provide a film package of a sanitary tissue paper that is excellent in openability.SOLUTION: A package 1, in which a bundle of sanitary tissue papers is packaged with a packaging film 4 made of soft resin, has an extraction port formation part 5 formed by annularly arranging an easy-to-open cutting line 50 on an upper surface 4C thereof. The easy-to-open cutting line 50 constituting an edge of at least one end part in a width direction of the extraction port formation part 5 is a perforation in which a deformed cut part which has an end cut portion and has a portion one end portion or both end portions of which are cut in a dogleg shape and a non-cut portion are alternately arranged.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a package in which a stack of folded sanitary tissue paper, such as paper towels, is wrapped in a flexible packaging film. [Background technology]

[0002] A known packaging form for sanitary thin papers such as paper towels and facial tissues is to fold and stack one or more plies, so that when the top sheet is picked up and pulled out, part of the next sheet is pulled out as well, forming a so-called pop-up stack, and then packaging the stack in a flexible plastic packaging film.

[0003] In the past, such packages of sanitary thin paper generally had a simple straight line perforation for forming the outlet, and a slit-shaped outlet was formed on the top surface. However, with a slit-shaped outlet, if the slit length was long, the sheets would fall inside when the number of sheets remaining inside became small, and if the slit length was short, it would be difficult to pull out the first sheet from the film after opening, and the resistance to pulling out the sheet would be too high at the beginning or end of use, causing the packaging film to lift up when pulling out the sheet, making it impossible to pop up.

[0004] In order to solve the problem of the slit-shaped outlet, a method has been proposed in which perforations for forming the outlet are arranged in an elongated ring shape extending in the longitudinal direction using a cutting technique such as die-cutting, so that the outlet has a width in the depth direction like a generally oval outlet (see Patent Documents 1 and 2 below). Furthermore, in recent years, in order to further improve the ease of taking out the contents, the outlet has also been made generally gourd-shaped with the ends in the width direction widened.

[0005] However, conventional roughly oval or gourd-shaped outlets place an emphasis on softness and flexibility, and are designed primarily for sanitary thin papers such as facial tissue paper, which is primarily used for facial purposes such as blowing your nose or wiping the area around the mouth while eating. They are not necessarily suitable for tissue paper that is "thick, sturdy, and tear-resistant" so that it can also be used to wipe skin other than the face or for wiping objects, or for sanitary thin papers such as paper towels, which are more rigid than facial tissue paper and are primarily used to dry hands after washing.

[0006] One way to improve the ease of removal of such sanitary tissue paper is to make the removal opening wider in the depth direction, but sanitary tissue paper, which is highly rigid, is difficult to design in the same way as facial tissue paper, which is soft and flexible, due to differences in paper quality. Simply making the removal opening wider in the depth direction makes it very likely that pop-up defects will occur, in which the next piece of sanitary tissue paper does not pop up but falls down when popped up, or that it falls over instead of standing up on the top surface of the package.

[0007] On the other hand, for example, in the case of the approximately elliptical take-out opening forming portion shown in Fig. 9(a), the take-out opening forming portion 105 formed by arranging the perforations 150 in a ring shape by die cutting or other die-cutting techniques has the advantage that the take-out opening can be easily formed by cutting and peeling off the range 105Z of the ring perforations from one end 105A in the longitudinal direction X to the other end 105B as shown in Fig. 9(b). However, when such an opening operation is performed, the direction in which the perforations 150 tear open at the other end 105B approaches the perforations 150e at the other end that is finally cut off, and the direction in which the range 105Z of the ring perforations is pulled becomes closer to the direction perpendicular to the direction in which the perforations 150 tear open, as shown in Fig. 9(c), does not tear open smoothly and continuously at this end, particularly near the perforations 150e at the end of 105B, and an unintended tear 105P may occur at the end of the take-out opening 106 as shown in Fig. 9(d). In the outlet forming part 105 formed by arranging the perforations 150 in a ring shape, as the widthwise end is widened in the depth direction Y, the range of the perforations approaching the direction perpendicular to the tearing direction becomes longer, so this tear is more likely to occur. Therefore, in an outlet forming part having a gourd shape with a widened end, the tear 105P is more likely to occur.

[0008] Furthermore, such tears 105P are more likely to occur when the packaging film is a uniaxially stretched film that is stretched in a direction Y perpendicular to the longitudinal direction X of the outlet forming section 105. Furthermore, in packages in the form of pillow packaging or gusset packaging, the longitudinal direction (MD direction) of the packaging film is generally parallel to the longitudinal direction of the outlet forming section, and therefore such tears are more likely to occur. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2018-052559 A [Patent Document 2] JP 2018-058654 A Summary of the Invention [Problem to be solved by the invention]

[0010] Therefore, in consideration of the above problems, the main object of the present invention is to provide a film-packaged package that is easy to open as the widthwise edges of the removal opening are less likely to tear when opened, and that also has excellent pull-out properties for sanitary tissue paper, particularly hard sanitary tissue paper such as paper towels. [Means for solving the problem]

[0011] The means for solving the above problems are as follows. The first means is, A package in which a bundle of sanitary tissue papers is wrapped in a flexible resin wrapping film, A take-out opening forming part is formed by arranging an easy-to-break line in an annular shape on the upper surface, The easy-to-tear line constituting the edge of at least one end in the width direction of the outlet forming portion is The perforations are arranged alternately between deformed cut sections having end cut sections and portions cut in a L-shape at one end or both ends, and non-cut sections. The packaging body is characterized by the above.

[0012] The second method is In the package according to the first means, the length of the end cut portion of the deformed cut portion is 0.5 to 2.5 mm, and the length of the non-cut portion between the deformed cut portions is 0.2 to 1.0 mm.

[0013] The third method is the outlet forming portion has a shape including a narrow portion extending in the width direction at a center portion in the depth direction, a wide portion continuing from an end of the narrow portion toward the outside in the width direction and gradually widening as it moves away from the narrow portion, and a curved convex portion continuing from the wide portion and bulging outward in the width direction; This is a packaging body relating to the first or second means described above, in which the portion constituting the edge of at least one of the curved convex portions of the easy-to-tear line has perforations in which deformed cut portions and non-cut portions are arranged alternately, with one end or both ends forming a L-shape.

[0014] The fourth measure is In the packaging body according to the third means, 80% or more of the portion constituting the edge of the curved convex portion is perforated with the deformed cut portions and non-cut portions arranged alternately.

[0015] The fifth measure is: The modified cut portion is a package according to the third or fourth means, which has an end cut portion at an end portion located depthwise outward from the center in the depth direction of the narrow width portion.

[0016] The sixth measure is: This is a package according to the third or fourth means, in which the end of the end cut portion is directed toward the widthwise center of the upper surface.

[0017] The seventh measure is: This is a packaging body according to the third or fourth means, in which the end of the end cut portion faces outward in the width direction of the upper surface.

[0018] The eighth method is: This is a package relating to the third or fourth means described above, in which the deformed cut portions and non-cut portions are arranged alternately, and only the ends of the end cut portions located at both ends in the depth direction of the upper surface face toward the outer width direction of the upper surface, while the ends of the other end cut portions face toward the center of the width direction of the upper surface.

[0019] The ninth measure is: In the package according to the third or fourth means, the curved convex portion has a depth length of 25 to 45 mm and a bulging length in the width direction of 2.5 to 12.5 mm.

[0020] The tenth measure is: The outlet forming portion has a widthwise length that is 70% or more of the widthwise length of the top surface of the stack, a maximum depthwise length that is 10 to 40% of the depthwise length of the top surface of the stack, a widthwise length of the narrow portion that is 50 to 70% of the widthwise length of the top surface of the stack, and a depthwise length that is 0.5 to 10% of the depthwise length of the top surface of the stack, in the packaging body relating to the third to ninth means described above. Effect of the Invention

[0021] According to the present invention, a film-packaged package is provided which is easy to open as the edges of the width direction of the outlet are not easily torn when opened, and which is also easy to pull out sanitary tissue paper, particularly hard sanitary tissue paper such as paper towels. [Brief description of the drawings]

[0022] [Figure 1] FIG. 2 is a perspective view illustrating a packaging body according to the present invention. [Diagram 2] FIG. 2 is a perspective view illustrating a stack of sanitary thin paper. [Diagram 3] FIG. 13 is a top view for explaining the outlet forming portion. [Figure 4] FIG. 2 is a perspective view for explaining a mode of use of the packaging body according to the present invention. [Diagram 5] FIG. 4 is a partially enlarged view for explaining the outlet forming portion. [Figure 6] 13A and 13B are diagrams for explaining other examples of the outlet forming portion. [Figure 7] 13A and 13B are diagrams for explaining examples of different shapes of the outlet forming portion. [Figure 8] FIG. 13 is a diagram for explaining another example of the outlet forming portion; [Figure 9] FIG. 13 is a diagram for explaining a conventional outlet forming portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, the present invention will be described with reference to Figs. 1 to 8 showing an embodiment of the present invention. Note that directions such as up-down and left-right directions in the present invention and this specification are subject to change depending on the orientation of the packaging body, and do not mean absolute directions in space. In addition, stiffness may also be referred to as stiffness, stiffness, or stiffness of paper.

[0024] The packaging body 1 according to the present invention is a bundle 3 of folded and stacked sanitary tissue paper 2 such as paper towels, wrapped in a flexible packaging film 4, and has an outlet forming portion 5 on an upper surface 4C. The packaging body 1 has a substantially hexahedral shape having a top surface 4C, a bottom surface 4D facing the top surface 4C, and long side surfaces 4B and short side surfaces 4A located between the top surface 4C and the bottom surface 4D, so as to approximate the shape of the bundle 3.

[0025] 1 to 4 show an embodiment of gusset packaging. This gusset packaging is a pillow packaging with a gusset, in which a bundle 3, which is a packaged item, is wrapped in a packaging film 4 by rolling it into a cylindrical shape so that openings are formed at both ends in the longitudinal direction, and the overlapping portion 4X in the rolling direction is bonded at the bottom of the bundle 3 by a fusion process or adhesive, and the edge of the portion extending beyond the short side surface 3A of the bundle 3 is bonded from above and below by a fusion process or adhesive while forming a gusset, so that the short side surface 4A becomes a sealing surface. In this gusset packaging, the sealing surface, which is the short side surface 4A, faces the short side surface 3A of the bundle 3, and the long side surface 4B, which is the gusset, faces the long side surface 3B, which is the folded surface of the bundle 3. However, in the present invention, the packaging form of the package 1 is not limited. It may be a simple pillow packaging without a gusset, or it may be an appropriate other packaging form such as an overlapping packaging, also called a caramel packaging, in which the short side surface 4A is configured by overlapping and fusing flaps as shown in FIG. 7.

[0026] The stack 3 of sanitary thin papers 2 contained in the package 1 according to the present invention is a so-called pop-up stack. As shown in Fig. 2 in particular, this stack 3 is formed by folding a rectangular sanitary thin paper 2 in half, with the folded-back pieces 2B of other sanitary thin papers 2 located above and below being positioned on the inside 2A of the folded-back piece, and is stacked with multiple pieces of sanitary thin paper 2, and has a pair of long sides 3B where the folded-back edges 2C of the sanitary thin papers 2 are aligned, a pair of short sides 3A where the folded-back edges 2C are not aligned, and a pair of flat surfaces (upper and lower surfaces) 3C connected to the short sides 3A and the long sides 3B, forming a substantially rectangular parallelepiped shape.

[0027] The number of sets of sanitary thin paper 2 constituting the bundle 3 is not limited, but can be 30 to 240 sets, with one ply or multiple plies constituting one set. The size of the bundle 3 is also not limited, but it is desirable for the bundle to be made up of 200 sets of sanitary thin paper and have a height of 30 to 100 mm, a longitudinal direction (width) of 150 to 250 mm, and a transverse direction (depth) of 100 to 130 mm. In addition, the effect of the present invention in improving pop-up defects is enhanced if the height of the bundle is shorter than the length in the depth direction of the top surface of the bundle.

[0028] The packing rate of the bundle 3 in the package 1 is not limited as long as it is within a range that does not impede the effects of the present invention, but it is preferable that the gap between the bundle and the packaging film is within a range of 0 to 30 mm. The bundle 3 may be packaged in a state where it is slightly compressed in the vertical direction by the packaging film.

[0029] Each sanitary thin paper 2 constituting the bundle 3 has a single-ply structure with one sheet or a laminated structure with multiple sheets. The number of plies is not limited, but a one-ply or two-ply structure is preferable. The basis weight per ply is not limited, but is 10 to 40 g / m 2 It is preferable that the weight per set is 1.0 to 2.5 g. The sanitary thin paper having one or two plies of sheets with the above basis weight is particularly suitable for paper towels suitable for wiping hands after washing. Furthermore, it is preferable that the thickness per set of this sanitary thin paper is 100 to 500 μm. Sanitary thin paper having such a number of plies, basis weight and thickness is highly effective in improving pop-up failure, in which the next sanitary thin paper does not rise up but falls down when popped up, and standing failure, in which the next sanitary thin paper does not rise up but falls down on the upper surface of the package, due to the configuration of the present invention, particularly the characteristic shape of the take-out opening forming portion having a narrow portion, a wide portion and a curved convex portion.

[0030] The basis weight is measured according to the method of JIS P 8124 (1998). The basis weight per ply can be calculated by basis weight = sheet weight per set / (sheet area x number of plies). The paper thickness is measured under the same conditions as in JIS P 8111 (1998), after the test piece has been sufficiently conditioned with moisture, using a dial thickness gauge (thickness measuring device) "PEACOCK G type" (manufactured by Ozaki Manufacturing Co., Ltd.) or an equivalent device, in a state of multiple plies.

[0031] Furthermore, the sanitary thin paper 2 according to the present invention is of a dried, dry type, and is not a so-called wet type impregnated with a chemical solution. Therefore, the stack 3 formed by the sanitary thin paper 2 contains a lot of air. Among this dry-type sanitary thin paper 2, there is also a type impregnated with a chemical solution, such as a moisturizing component that increases moisture by absorbing moisture from polyols such as glycerin, and such sanitary thin paper may be used.

[0032] The raw pulp constituting the sanitary thin paper 2 is not limited. Examples include a blend of pulp derived from coniferous trees such as NBKP and pulp derived from broadleaf trees such as LBKP. In addition, recycled paper pulp may be blended, or the sanitary thin paper may consist only of recycled paper pulp. In the present invention, since particularly excellent effects are exhibited in sanitary thin paper with high stiffness such as paper towels, it is preferable that the pulp derived from coniferous trees is more than 50%.

[0033] The dry tensile strength of the sanitary thin paper 2 is not limited, but a lengthwise direction of 1000 to 3000 cN / 25 mm and a widthwise direction of 250 to 1500 cN / 25 mm is particularly suitable for the present invention. The dry tensile strength is measured according to JIS P8113 (1998). Measuring devices include the "Universal Tension and Compression Tester TG-200N" manufactured by Minebea Co., Ltd. and equivalents.

[0034] The take-out opening forming section 5 is formed by arranging an easy-to-tear line 50 in an annular shape on the upper surface 4C of the packaging film 4 facing the sanitary thin paper 2 at the top of the stack 3. In this specification, the term "annular" does not mean limited to a circular or elliptical shape, but means a shape in which a closed area is formed. Such a take-out opening forming section 5 tears the easy-to-tear line 50 and separates and removes the area surrounded by the easy-to-tear line 50 to form a take-out opening 6, which is an opening for pulling out the sanitary thin paper 2, on the upper surface 4C of the package 1. In the package 1 according to the present invention, since the stack 3 is a pop-up type, when one sheet of sanitary thin paper 2 at the top of the stack 3 is pulled out from the formed take-out opening, a part of the next sanitary thin paper located immediately below it is exposed from the take-out opening. In addition, since the take-out opening forming section 5 has the easy-to-tear line 50 arranged in an annular shape, the take-out opening 6 formed by separating and removing the area surrounded by the easy-to-tear line 50 is not a slit shape that is only straight, but has a certain width in the depth direction. Such an outlet forming section 5 has excellent operability when opening because the film in the area within the outlet forming section 5 can be separated and removed by continuously pulling and cutting the area surrounded by the easy-to-tear line 50 from one end 5A to the other end 5B. Note that in this specification, the end located on the left side of the drawing is described as one end 5A and the end located on the right side is described as the other end 5B, but this is merely defined for convenience of explanation and these can be interchanged.

[0035] 1 to 5 shows a package 1 having a gourd-shaped outlet forming section 5, which is a particularly preferred shape. This outlet forming section 5 has a narrow section 51 extending in the width direction at the center in the depth direction of the top surface 4C, a wide section 52 continuing from the end of this narrow section 51 and gradually widening away from the narrow section 51 toward the outside in the width direction of the bundle 3, and a curved convex section 53 continuing from this wide section 52 and bulging outward in the width direction of the bundle 3.

[0036] It is particularly preferable that the widened portion 52 is arranged so that the angle of the easy splitting line 50 with respect to the width direction gradually increases toward the outside in the width direction of the bundle 3. It is preferable that the taper angle ∠α of the easy splitting line 50, which is the edge of the widened portion 52, with respect to the width direction is 25 to 60 degrees.

[0037] In addition, it is desirable that the easy cracking line 50 is formed in a curved line and smoothly connected from the widening portion 52 to the curved convex portion 53. When the easy cracking line 50 is arranged in this manner, the easy cracking line 50 can be easily cracked smoothly from the widening portion 52 to the curved convex portion 53.

[0038] 1 to 5, the outlet 6 formed by the outlet forming part 5 has a free edge piece 51A in a substantially trapezoidal shape that is easy to move up and down near the edge extending from the narrow part 51 to the wide part 52, and therefore, as shown in particular in Fig. 4, when a set of sanitary thin paper 2 is pulled out from the stack 3, the edge piece 51A deforms so as to be rolled up slightly in the direction of pulling out, and leans against and supports the next exposed set of sanitary thin paper 2. Also, the outlet 6 by this outlet forming part 5 deforms so that the root portion 2R of the next sanitary thin paper, which is partly exposed from the outlet 6 and which follows the sanitary thin paper pulled out from the stack 3, is rolled up along the edge 6E of the curved convex part 53, and is easily deformed into a columnar shape with high uprightness. Furthermore, the area between the widened portion 52 and the curved convex portion 53 of the outlet forming portion 5 becomes a recessed portion 6H when the outlet 6 is formed, so that the root portion 2R of the next sanitary thin paper, which is partially exposed from the outlet 6, fits into this recessed portion 6H, thereby improving the uprightness. In particular, in this outlet forming portion 5, the above action makes it difficult for pop-up defects caused by the sagging of the inside of the packaging film of the sanitary thin paper, which is said to be likely to occur when the rigidity of the sanitary thin paper is high, to occur. This effect is particularly effective in combination with the sanitary thin paper of the above-mentioned suitable basis weight and paper thickness, and further with a suitable packaging film described below. However, the outlet forming portion 5 according to the present invention may have a shape that does not have the widened portion 52, as shown in FIG. 7. In addition, the outlet forming portion 5 may have a straight easy-to-tear line connected to the easy-to-tear line arranged in a ring shape, as long as it does not interfere with the effect of the present invention.

[0039] In addition, in the shape of the outlet forming section 5 having the narrow portion 51, the wide portion 52, and the curved convex portion 53 as shown in FIG. 1 to FIG. 5, it is particularly preferable that the widthwise length L1 of the entire outlet forming section 5 is 70% or more of the widthwise length L2 of the top surface of the bundle 3, the maximum depthwise length L3 of the entire outlet forming section 5 is 10 to 40% of the depthwise length L4 of the top surface of the bundle 3, the widthwise length L5 of the narrow portion is 50 to 70% of the widthwise length L2 of the top surface of the bundle 3, and the depthwise length L6 of the narrow portion is 0.5 to 10% of the depthwise length L4 of the top surface of the bundle 3. In this shape of the outlet forming section 5, the curved convex portion 53 is formed, which is particularly wide in the depth direction. In addition, the free edge piece 51A formed near the edge of the narrow portion 51 is wider and larger, and the narrow portion 51 can be opened widely when pulled out. Therefore, the sanitary thin paper 2 can be smoothly taken out when pulled out from the bundle 3. In particular, even if a clear fold line is difficult to form at the boundary between the short side surface 4A and the top surface 4C, such as in gusset packaging or pillow packaging, and the packaging film at the top surface position of the package 1 is easily deformed, or the sanitary thin paper contained therein is a highly rigid sanitary thin paper 2 such as a paper towel having the above-mentioned basis weight and paper thickness, which is easily deformed at the top surface position of the package 1 when it is pulled out, the entire top surface is less likely to be distorted and is easily maintained flat when the sanitary thin paper 2 is pulled out, making it particularly easy to stably take out the sanitary thin paper 2 one sheet at a time. Also, the free, approximately trapezoidal edge piece 51A formed near the edge of the narrow width portion 51 is wider and larger, and a deep recessed portion 6H is formed, so that the edge piece firmly rests against the highly rigid sanitary thin paper 2 and supports the base portion 2R of the sanitary thin paper 2, effectively preventing it from sagging. In addition, since the edge length of the curved convex portion 53 is longer, the sanitary thin paper 2 is gently rolled along the edge of the curved convex portion 53, but since the sanitary thin paper 2 has high rigidity, it is less likely to break, and therefore has better uprightness.

[0040] Specifically, it is preferable that the length L3 of the curved convex portion 53 in the depth direction is 25 to 45 mm, and the bulging length L7 in the width direction is 2.5 to 12.5 mm.

[0041] On the other hand, specific examples of the flexible resin packaging film 4 constituting the exterior of the package 1 include polyethylene film, polypropylene film, polyester film, polyethylene terephthalate film, nylon film, vinylidene chloride film, and single-layer film of ethylene-vinyl alcohol copolymer, or laminate films containing these films and appropriately stacked layers, and gas barrier films obtained by subjecting these films to surface treatment such as aluminum deposition. Also, biomass films derived from plant raw materials such as sugar cane, potato (starch), and corn can be used. The use of such biomass films is desirable from the viewpoint of environmental protection.

[0042] In particular, polypropylene film and polyethylene film are suitable. The packaging film 4 may be a matte film that has excellent design and feel. The melting point of the film is preferably 150°C or lower. The lower the melting point of the packaging film, the lower the temperature at which the heat fusion treatment can be performed, but the practical lower limit is 80°C. Examples of polypropylene films include non-oriented polypropylene film (CPP), and examples of polyethylene films include linear low-density polyethylene film (LLDPE), low-density polyethylene film (LDPE), and medium-density polyethylene film (MDPE).

[0043] Furthermore, when packaging scented items such as scented tissue paper, ethylene-vinyl alcohol copolymer resin film or polyethylene terephthalate resin film, which have excellent scent retention, is desirable. A multilayer resin film having improved heat-sealing properties by laminating a polyethylene resin film or a polypropylene resin film on one or both sides of the ethylene-vinyl alcohol copolymer resin film or the polyethylene terephthalate resin film may also be used.

[0044] where 、As shown in Figs. 5 and 6, the outlet forming section 5 has a characteristic perforation in which the edge 50P of at least one end (the other end 5B in the illustrated example) of the outlet forming section 5 has an end cut portion 50e of the easy tearing line 50 and a deformed cut portion 50D having a portion cut into a dogleg shape at one end or both ends, and a non-cut portion 50U are alternately arranged. In the shape of the outlet forming section 5 shown in Figs. 1 to 6, the area of ​​80% or more of the part constituting the edge of the curved convex portion 53 is the area 50P where the deformed cut portion 50D and the non-cut portion 50U are alternately arranged. In this curved convex portion 53, the area of ​​preferably 90% or more, particularly preferably 95% or more, is the area 50P where the deformed cut portion 50D and the non-cut portion 50U are alternately arranged. The entire area may be composed of an easy tearing line where the deformed cut portion 50D and the non-cut portion 50U are alternately arranged. Although Figures 5 and 6 show a form in which the portion constituting the edge of the curved convex portion 53 is a portion 50P in which deformed cut portions 50D and non-cut portions 50U are arranged alternately, the present invention is not limited to this, and as shown in Figure 7, the portion constituting the edge of the end portion of a simply approximately elliptical outlet forming portion 5 may be formed by alternating deformed cut portions 50D and non-cut portions 50U.

[0045] More specifically, as shown in Figures 5 and 6, the modified cut portion 50D has end cut portions 50e arranged continuously at a predetermined angle at one end or both ends of the main cut portion 50m on a straight or substantially straight gently curved line, and has a shape having a portion cut into a dogleg at one end or both ends. As shown in Figure 5, the modified cut portion 50D has a dogleg at only one end. 1 and a deformed cut portion 50D formed in a L-shape at both ends. 2 As shown in FIG. 6(c), a deformed cut portion 50D in which the end of one end cut portion 50e faces the outer side in the width direction of the upper surface of the bundle 3 and the end of the other end cut portion 50e faces the center side in the width direction of the upper surface of the bundle 3 may be formed. 3 There may be.

[0046] Furthermore, as for the arrangement form of the deformed cut portion 50D in the part where the deformed cut portion 50D and the non-cut portion 50U are alternately arranged, as shown in Fig. 5 and Fig. 6(a), only the ends of the end cut portion 50e facing the width direction outer side of the upper surface of the bundle 3 may be arranged, or as shown in Fig. 6(b), only the ends of the end cut portion 50e facing the width direction outer side of the upper surface of the bundle 3 may be arranged toward the width direction center of the upper surface of the bundle 3. Furthermore, as shown in Fig. 6(c), only the ends of the end cut portion 50e located at both ends in the depth direction of the upper surface of the bundle 3 may face the width direction outer side of the upper surface, and the other end cut ends may face the width direction center of the upper surface.

[0047] The outlet forming section 5 according to the present invention has a section 50P in which the deformed cut section 50D and the non-cut section 50U are alternately arranged at the widthwise end (the other end 5B in the illustrated example), which is the most easily torn section that is torn last in a general opening operation in which the range surrounded by the easy-to-tear line 50 is continuously pulled from one end 5A to the other end 5B. In such a section 50P in which the deformed cut section 50D and the non-cut section 50U are alternately arranged, when a general opening operation is performed in which the range surrounded by the easy-to-tear line 50 is continuously pulled from one end 5A to the other end 5B, if the adjacent end cut sections 50e of the adjacent deformed cut sections D are both toward the outer width direction side of the upper surface of the bundle 3, or toward the center width direction of the upper surface of the bundle 3, the extension directions of the adjacent end cut sections are in a direction that approaches and crosses each other, so that the non-cut section 50U between them is easily cut. In addition, when one of the adjacent end cut parts 50e of the adjacent deformed cut parts D faces the outer side in the width direction of the upper surface of the bundle 3 and the other faces the center side in the width direction of the upper surface of the bundle 3, when a general opening operation is performed in which the range surrounded by the easy tearing line 50 is continuously pulled from one end 5A to the other end 5B, the non-cut part 50U between them is easily cut without tearing or stretching the film because a twist occurs just before cutting. Similarly, when one of the adjacent ends of the adjacent deformed cut parts D has an end cut part 50e and the other does not have an end cut part 50e, when a general opening operation is performed in which the range surrounded by the easy tearing line 50 is continuously pulled from one end 5A to the other end 5B, the non-cut part 50U between them is easily cut without tearing or stretching the film because a twist occurs just before cutting. In this way, by forming a portion 50P in which deformed cut portions 50D and non-cut portions 50U are arranged alternately at the widthwise end (the other end 5B in the illustrated example), the risk of tearing when opening is reduced.In particular, in the case of a gourd-shaped container having a narrow portion 51, a wide portion 52, and a curved protrusion 53 as shown in Figs. 1 to 5, which is excellent in terms of the pull-out property of a highly rigid paper towel, and more particularly in the case of a container having the above-mentioned preferred numerical range, the range of the easy-to-tear line constituting the edge of the curved protrusion 53 is long and is arranged along the depth direction, so that the cross angle between the pulling direction at the time of opening and the tearing direction of the easy-to-tear line is large, and the shape is such that the packaging film 4 is likely to tear during the opening operation. However, by providing a portion 50P at the end where the deformed cut portion 50D and the non-cut portion 50U are alternately arranged, the risk of tearing is significantly reduced. This is particularly effective in a packaging form such as a pillow packaging or a gusset packaging, in which tearing is likely to occur when the vertical direction (MD direction) of the packaging film 4 is parallel to the longitudinal direction of the take-out opening forming portion 5.

[0048] Furthermore, in the outlet forming section 5 according to the present invention, in the portion 50P where the deformed cut portions 50D and the non-cut portions 50U are alternately arranged, the end positions of the deformed cut portions 50D are slightly shifted inward or outward in the width direction from the extension direction of the main cut portions 50m by the end cut portions 50e, so that when the outlet 6 is formed, the portions that were the non-cut portions 50U become slightly convex and form sawtooth edges. Therefore, when a set of sanitary thin paper 2 is pulled out from the stack 3, this sawtooth edge clamps the widthwise edge of the root portion 2R of the next set of sanitary thin paper 2 following the pulled out sanitary thin paper that is partially exposed from the outlet, improving prevention of sagging.

[0049] where 、 As shown in FIG. 5, the shape of the outlet forming portion 5 is such that the deformed cut portion 50D is located on the extension line in the width direction of the center C in the depth direction of the narrow width portion 31, and the deformed cut portion 50D has end cut portions 50e at both ends extending outward in the width direction. 2 In addition, the deformed cut portion 50D 2 The deformed cut portion 50D has an end cut portion extending outward in the width direction only at the end portion located outward in the depth direction from the center of the narrow portion 32 in the depth direction. 1 The form in which It can be said that:In the take-out opening forming portion 5 shown in FIG. 5, in a general opening operation in which the area surrounded by the easy-to-tear line 50 is continuously pulled from one end 5A to the other end 5B, the deformed cut portion 50D 1 The adjacent deformed cut portion 50D is located at a position on the widthwise outer side of the end that does not have the cut portion in the tensile direction. 1 ,50D 2 Since the end cut portion 50e is present, even if a small tear occurs in the packaging film when the non-cut portion 50U therebetween tears open during the opening operation, the tear is likely to continue to the already torn end cut portion 50e immediately thereafter, making it difficult for the tear to progress any further.

[0050] The ratio of the length of the deformed cut portion 50D at the end of the outlet forming portion 5 to the length of the non-cut portion 50U is not necessarily limited, but the length L8 of the deformed cut portion 50D is not limited, but is preferably 5 mm or more and 20 mm or less, preferably 7 mm or more and 13 mm or less. Also, the length L9 of the end cut portion 50e of the deformed cut portion 50D is preferably 0.2 mm or more and 3.0 mm or less, preferably 0.5 mm or more and 2.5 mm or less. Furthermore, the length L11 of the non-cut portion 50U between the deformed cut portions 50D is preferably 0.2 mm or more and 3.0 mm or less, preferably 0.3 mm or more and 2.0 mm or less. In this range, tears are extremely unlikely to occur between the deformed cut portions 50D, and the non-cut portion 50U is cut, making it easier for the tearing to proceed continuously and smoothly.

[0051] In addition, the angle between the main cut portion 50m and the end cut portion 50e in the L-shaped portion of the modified cut portion 50D may be 90° or more. It is preferably 100° or more, more preferably 120° or more. It is also preferable that the angle is rounded from the modified main cut portion 50m to the end cut portion 50e. In this case, the curvature of the L-shaped portion is not limited, but is preferably R0.1 to R2.0, more preferably R0.2 to 1.2, and particularly preferably R0.4 to 1.1. With this curvature, the cut portion is easily opened smoothly from the main cut portion 50m to the end cut portion 50e.

[0052] In addition, in the easy-to-tear line 50 constituting the edge of the outlet forming part, the part 50P where the deformed cut part 50D and the non-cut part 50U are alternately arranged may be at both ends of the outlet forming part 5, or may be only at one end. If it is formed only at one end, the opposite end can be, for example, a cut part 53C that continues in the range L10 from the middle of the widening part 52A on one side in the depth direction to a position beyond the outer end 53t of the curved convex part 53A, as shown in FIG. 8(a). In this way, as shown in FIG. 8(b), a free piece 5T is formed in the range including one of the depth sides to the outer end at one end 5A of the outlet forming part 5, which makes it easier to pinch and turn up the free piece 5T, making it easier to open the package.

[0053] Here, the thickness L9 of the packaging film 4 may be appropriately selected, but is preferably 25 to 75 μm as measured in accordance with JIS P 8118 (1998). If the thickness is 25 to 75 μm, the effect of the present invention can be particularly effectively exhibited. The thickness L9 is measured using a dial thickness gauge (thickness measuring device) "PEACOCK G-1A type" (manufactured by Ozaki Manufacturing Co., Ltd.) or an equivalent device after the measurement sample is sufficiently humidified under the conditions of JIS P 8111 (1998).

[0054] Furthermore, in the package 1, it is desirable that the softness of the packaging film 4 is less than that of the sanitary thin paper 2. If the softness of the packaging film is less than that of the sanitary thin paper 2, the sawtooth edge formed by the line of convex cut portions and non-cut portions, particularly the multiple convex pieces 6T, will be easily deformed so as to roll up in the pulling direction when the sanitary thin paper 2 is pulled out, reducing the pulling resistance and allowing for smooth pulling, and also reducing the generation of paper powder due to friction.

[0055] In the easily splittable line 50 constituting the outlet forming section 5 according to the present invention, the portion other than the portion where the deformed cut portion 50D and the non-cut portion 50U are alternately arranged can be a perforation, a slit cut with an uncut portion (non-cut portion), etc. However, it is not limited thereto.

[0056] As long as the portion other than the portion where the deformed cut portion 50D and the non-cut portion 50U are alternately arranged is a perforation, the type is not limited. Examples of perforations include normal perforations in which the cut portion 50C is a straight line, micro perforations in which the cut portion is a hole, and zipper perforations in which the cut portion is Y-shaped, approximately L-shaped, <-shaped, etc. Preferred are normal perforations. A slit cut is a portion in which a film is cut into a slit shape, but by having a non-cut portion, the non-cut portion and the cut portion are arranged alternately. Note that a slit cut having a non-cut portion may simply be referred to as a slit cut. Although perforations and slit cuts having a non-cut portion are sometimes not distinguished, in the present invention, a slit cut is referred to as a slit cut when the cut portion is less than two pitches, that is, when there are no consecutive cut portions of the same length twice. Generally, a slit cut is formed with a cut portion longer than a perforation.

[0057] The cut-tie ratio of the slit cut having perforations or non-cut portions in the parts other than the parts where the deformed cut portions 50D and non-cut portions 50U are arranged alternately is determined at an appropriate interval depending on the ease of tearing of the film used, but the length of the cut portions should be designed appropriately from the range of 0.8 mm or more and 20.0 mm or less, and the length of the non-cut portions (tie portions or uncut portions) should be designed appropriately from the range of 0.3 mm or more and 5.0 mm or less.

[0058] In addition, the non-cut portion 50U in the easy tear-open line 50 according to the present invention may be a half-cut portion that is not completely cut in the thickness direction of the packaging film 4 from the front side, which is the surface that does not face the bundle 3, to the back side, which is the surface that faces the bundle 3, but is cut to a predetermined depth range in the thickness direction. By making the non-cut portion 50U a half-cut portion with a cut, the force required to tear the packaging film 4 is reduced, and the tearing of the easy tear-open line 50 is likely to proceed continuously and smoothly. The non-cut portion 50U between the deformed cut portions 50D located at the end of the take-out opening forming portion 5, particularly the curved convex portion, may be a half-cut portion. The depth of the cut in the half-cut portion is not limited, but it is preferable that it is 20% to 80% of the thickness of the packaging film.

[0059] 1 to 5, the narrow width portion 51, the wide width portion 52, and the curved convex portion 53 have an edge portion of the narrow width portion 51 whose extension direction coincides with the pulling direction from one end portion 5A to the other end portion 5B during the opening operation, and therefore it is preferable that the non-cut portion is configured with a perforation that is not a half-cut portion. This makes it difficult for the edge of the narrow width portion 51 to tear open unintentionally.

[0060] In addition, the slit cut having perforations and non-cut portions, including the portion where cut portions 50C and half-cut portions 50H are alternately arranged, of the easy-to-tear open line 50 can be formed in one operation, for example, by die cutting. EXAMPLES

[0061] Next, the present invention Reference example Tests were carried out on the sagging of the sanitary tissue paper and the tearing of the opening for dispensing. Reference example 1~ Reference example The shape of the outlet forming portion of the packages according to No. 4 and Comparative Example 1 is roughly gourd-shaped with a narrow portion, a wide portion, and a curved convex portion as shown in Figures 1 to 5. The outlet forming portion of the package according to Comparative Example 2 is simply a linear perforation.

[0062] The bundle contained in each package in each example is 100 sets of one-ply paper towels (product name: Raku-ra Cook Kitchen Paper, basis weight 20 g / m2, paper thickness 220 μm) folded and stacked in a pop-up style. The packaging form in each example is a gusset package, in which the stretch direction of the packaging film is perpendicular to the width direction of the take-out opening forming portion.

[0063] In the "number of sagging" test, the easy-to-tear line associated with the outlet formation portion was ripped open to form an outlet, and each paper towel making up the bundle was pulled out from the outlet in order down to the last one, and the number of times sagging actually occurred was counted.

[0064] For "openability," subjects were asked to open each sample by pinching one end and pulling it toward the other end, and the test was evaluated for whether or not a tear occurred at the other end of the outlet. N=10, and cases where a tear occurred were rated as "yes," and cases where no tear occurred were rated as "no."

[0065] The dimensions of the outlet forming portion in each example, the ratio of the depth direction length and width direction length of the top surface of the bundle, and the test results are shown in Table 1 below.

[0066] [Table 1]

[0067] From Table 1, the part constituting the edge of the end (curved convex part) is arranged so that cut parts and half cut parts are alternately arranged. Reference example 1~ Reference example In No. 4, the maximum length of the outlet in the depth direction, i.e., the length of the curved convex part at the end in the depth direction, was 35 mm, which was long and accounted for 30% of the depth direction of the top surface of the bundle, making it prone to tearing. However, no tearing was confirmed at the end of the outlet when the package was opened.

[0068] Comparative Example 1 is Reference exampleIn Comparative Example 1, the area between the cut sections of the curved convex portion is not a half-cut section but a non-cut section as is common in the prior art. However, in this Comparative Example 1, tears occurred at the end of the outlet when the package was opened. Reference example It was shown that even in the case of a line that easily splits open, such as that constituting the edge of a very long curved convex portion, by arranging cut sections and half-cut sections alternately in that portion, tearing of the end of the outlet port can be prevented during the opening operation.

[0069] Therefore, for example, in the case of a narrower outlet shape that does not have an enlarged portion as shown in Figure 7, it can be said that tearing of the end of the outlet during opening can be better prevented by arranging the easy-to-crack line that forms the edge of the end portion alternately between cut portions and half-cut portions.

[0070] In addition, in regard to the sagging, in Comparative Example 2 in which the outlet forming portion is a single perforation and the outlet is a slit, 12 saggings were confirmed. Reference example 1~ Reference example In Comparative Example 4 and Comparative Example 1, the number of sagging was 0, and no sagging was observed. In other words, it was shown that the outlet formed by the shape of the outlet forming portion having the narrow portion, the wide portion, and the curved convex portion is particularly excellent in preventing sagging.

[0071] From the above, the packaging body according to the present invention is a film-packaged packaging body that is easy to open because the edges of the opening in the width direction are not easily torn when opened, and is also easy to pull out sanitary thin paper, particularly hard sanitary thin paper such as paper towels. It can be said that . [Explanation of symbols]

[0072] 1...packaging body, 2...sanitary tissue paper, 2A...folded inner side, 2B...folded piece, 2C...folded edge, 2R...root part of sanitary tissue paper exposed from removal opening, 3...stack of sanitary tissue paper, 3A...short side, 3B...long side, 3C...top and bottom surfaces of stack, 4...packaging film, 4A...short side, 4B...long side, 4C...top surface, 4D...bottom surface, 4X...overlapping part of packaging film, 5...removal opening forming part, 5A, 5B...longitudinal ends, 5T...free piece, 6...removal opening, 6E...edge of removal opening, 6E...recessed part of removal opening. 41: front side of packaging film; 42: back side of packaging film; 50: easy tearing line; 50D, 50D 1 ,50D 2 ,50D 3 ...deformed cut portion, 50m...main cut portion, 50e...end cut portion, R...curvature of the L-shaped portion, ∠β...opening angle of the L-shaped portion, 50C...cut portion, 50U...non-cut portion (tie portion), 50P...portion where deformed cut portions and non-cut portions are arranged alternately, 51...narrow portion, 51A...approximately trapezoidal edge piece, 52...widened portion, 53...curved convex portion, ∠α...taper angle of the widened portion. L1...widthwise (longitudinal) length of the outlet forming portion 5, L2...widthwise (longitudinal) length of the top surface of the bundle, L3...maximum depthwise (short) length of the outlet forming portion 5, L4...depthwise (short) length of the top surface of the bundle, L5...widthwise (longitudinal) length of the narrow portion, L6...depthwise (short) length of the narrow portion, L7...widthwise bulge length of the curved convex portion, L8...length of the deformed cut portion, L9...length of the end cut portion, L10...range from the middle of the widening portion 52A on one side in the depth direction to a position beyond the outer end 53t of the convex portion 53, L11...length of the non-cut portion between the deformed cut portions. 105...take-out port forming section, 105A...one end of the take-out port forming section, 105B...other end of the take-out port forming section, 105P...tear in film, 150...perforation, 150e...perforation at widthwise end, X...longitudinal direction (width direction), Y...direction perpendicular to the longitudinal direction (depth direction), Z...thickness direction of the packaging film, C...center of the depthwise direction of the narrow section.

Claims

1. A package in which a bundle of sanitary tissue papers is wrapped in a flexible resin wrapping film, A take-out opening forming part is formed by arranging an easy-to-break line in an annular shape on the upper surface, the outlet forming portion has a shape including a narrow portion extending in the width direction at a center portion in the depth direction, a wide portion continuing from an end of the narrow portion toward the outside in the width direction and gradually widening as it moves away from the narrow portion, and a curved convex portion continuing from the wide portion and bulging outward in the width direction; At least one of the curved convex portions of the easily rupturable line has a perforation in which one end or both ends are L-shaped and deformed cut portions and non-cut portions are alternately arranged, In the perforations in which the deformed cut portions and the non-cut portions are alternately arranged, only the ends of the end cut portions located at both ends in the depth direction of the upper surface face toward the outer side in the width direction of the upper surface, and the ends of the other end cut portions face toward the center in the width direction of the upper surface. A package comprising:

2. 2. The package according to claim 1, wherein the length of the end cut portion of the deformed cut portion is 0.5 to 2.5 mm, and the length of the uncut portion between the deformed cut portions is 0.2 to 1.0 mm.

3. 3. The package according to claim 1, wherein 80% or more of the edge of the curved convex portion is perforated with the deformed cut portions and non-cut portions arranged alternately.

4. 4. The package according to claim 1, wherein the length of the curved convex portion in the depth direction is 25 to 45 mm, and the bulging length in the width direction is 2.5 to 12.5 mm.

5. The packaging body according to any one of claims 1 to 4, wherein the outlet forming portion has a widthwise length that is 70% or more of the widthwise length of the top surface of the stack, a maximum depthwise length that is 10 to 40% of the depthwise length of the top surface of the stack, a widthwise length of the narrow portion that is 50 to 70% of the widthwise length of the top surface of the stack, and a depthwise length that is 0.5 to 10% of the depthwise length of the top surface of the stack.

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