Packaging

Abstract

To provide a film package of sanitary tissue paper that is excellent in the opening property.SOLUTION: The package obtained by packaging a bundle of sanitary tissue paper with a soft resin-made packaging film, has a take-out port forming part that has an annular easy-to-part line on the top face. The easy-to-part line forms at least the edge of one end part in the width direction of the take-out port forming part. In the easy-to-part line, on one end or both ends of a main cut part, a deformed cut part, where a dogleg-shaped end cut part is connected at the angle of 90° or larger, is formed of perforation arranged via a non-cut part, and the end cut part thereof and the end part of the other deformed cut part neighboring the end cut part without an end cut part provided thereon are positioned so as to overlap on at least one of the outer side and the center side of the take-out port forming part in the width direction. In addition, the overlap of the end cut part and the end part without the end cut part provided thereon are resolved by the package where the deformed cut part positioned on the outer side of the take-out port forming part in the width direction is overlapped so as to be further outer side in the width direction of the take-out port forming part.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 to have a generally gourd-like shape 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 part 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 likely to occur. Therefore, in an outlet forming part having a gourd shape with a widened end part, the tear 105P is 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 A modified cut section in which a L-shaped end cut section is connected at an angle of 90° or more to one end or both ends of a main cut section has perforations aligned through a non-cut section, The end cut portion is arranged so as to overlap with an end portion of another adjacent deformed cut portion where the end cut portion is not provided at least one of the outer side and the center side in the width direction of the outlet forming portion, and The end cut portion and the end portion where the end cut portion is not provided overlap each other such that the deformed cut portion located on the outer side in the width direction of the outlet forming portion is located on the outer side in the width direction of the outlet forming portion. The packaging body is characterized by the above.

[0012] The second 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; In the packaging body according to the first means described above, the portion constituting the edge of at least one of the curved convex portions of the easy tear-open line has perforations in which deformed cut portions and non-cut portions are arranged alternately.

[0013] The third method is In the packaging body according to the second means described above, 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.

[0014] The fourth measure is In the package according to the second 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.

[0015] The fifth measure is: In the packaging body relating to the second to fourth means described above, 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. Effect of the Invention

[0016] 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]

[0017] [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

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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%.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 1 to 5, the outlet 6 formed by the outlet forming part 5 has a free, generally trapezoidal edge piece 51A that is easy to move up and down near the edge extending from the narrow portion 51 to the wide portion 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, part of which is exposed from the outlet 6 following 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 highly upright columnar shape. 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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).

[0038] Furthermore, when packaging odorous items such as scented tissue paper, an ethylene-vinyl alcohol copolymer resin film or a polyethylene terephthalate resin film, which have excellent aroma 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.

[0039] Here, as shown in Figures 5 and 6, the outlet forming section 5 according to the present invention has an easy-to-tear line 50 at the edge of at least one end (the other end 5B in the illustrated example) in the width direction of the outlet forming section 5, and a deformed cut section 50D in which a L-shaped end cut section 50e is connected at an angle of 90° or more to the end of the main cut section 50m, lined up through a non-cut section 50U. As shown in Figure 5, this deformed cut section 50D has a L-shaped end cut section 50e formed only at one end. 1 and a deformed cut portion 50D in which a L-shaped end cut portion 50e is formed on both ends. 2 6(a) and 6(b), the deformed cut portion 50D may be formed only with a V-shaped end cut portion 50e at one end. Furthermore, as shown in FIG. 6(b), the deformed cut portion 50D may be formed in such a manner that a cut portion 50C without an end cut portion 50e is disposed between the perforations arranged with a non-cut portion 50U interposed therebetween.

[0040] In addition, in the shape of the outlet forming part 5 shown in Figs. 1 to 6, 80% or more of the area constituting the edge of the curved convex part 53 is the part 50P where the deformed cut part 50D and the non-cut part 50U are alternately arranged. In this curved convex part 53, preferably 90% or more, particularly preferably 95% or more of the area is the part 50P where the deformed cut part 50D and the non-cut part 50U are alternately arranged. The entire area may be composed of an easy-to-tear line where the deformed cut part 50D and the non-cut part 50U are alternately arranged. In addition, Figs. 5 and 6 show a form in which the part constituting the edge of the curved convex part 53 has the part 50P where the deformed cut part 50D and the non-cut part 50U are alternately arranged, but the present invention is not limited to this, and as shown in Fig. 7, the part constituting the edge of the end part of the outlet forming part 5 having a simple approximately elliptical shape may be the part where the deformed cut part 50D and the non-cut part 50U are alternately arranged.

[0041] More specifically, the end cut portion 50e in the modified cut portion 50D is a first cut portion 50e following the main cut portion 50m, as shown in FIG. 1 and the first cut portion 50e 1 The second cut section 50e follows 2 and they are connected with an angle ∠β of 90° or more therebetween to form an L-shape.

[0042] Furthermore, the arrangement of the deformed cut portions 50D in the portion where the deformed cut portions 50D and the non-cut portions 50U are alternately arranged is such that a part of the end cut portion 50e overlaps an end portion 50t of the adjacent deformed cut portion where no end cut portion is provided, at least on one side of the outer side and the center side in the width direction of the outlet forming portion 5, and the overlap between the end cut portion 50e and the end portion 50t where no end cut portion is provided is Center of depth The deformed cut portion 50D located at the end of the outlet forming portion 5 is configured to overlap with the deformed cut portion 50D located at the end of the outlet forming portion 5 being on the outer side in the width direction of the outlet forming portion 5. FIG. 5 shows an example in which the end cut portions 50e are arranged to overlap only on the outer side in the width direction of the outlet forming portion 5, but the end cut portions 50e do not necessarily have to be located on the outer side in the width direction of the outlet forming portion 5. As shown in FIG. 6(b), the end cut portions 50e may be arranged to overlap only on the center side in the width direction of the outlet forming portion 5, or as shown in FIG. 6(a), there may be a mixture of end cut portions 50e that overlap on the outer side in the width direction of the outlet forming portion 5 and those that overlap on the center side in the width direction of the outlet forming portion 5. The present invention is not concerned with the end cut portions 50e but with the arrangement of the end cut portions 50e of the outlet forming portion 5. Center of depth The cut portion 50C without the end cut portion 50e and the end cut portion 50e overlap each other in the same manner. As shown in FIG. 6(b), the cut portion 50C without the end cut portion 50e is located closer to the outlet forming portion 5 than the adjacent deformed cut portion 50D. Center of depth In this case, it is preferable that the end of the cut portion 50C that does not have the end cut portion 50e overlaps with the end cut portion 50e of the deformed cut portion 50D so as to be on the outer side in the width direction of the outlet forming portion 5 than the end cut portion 50e of the deformed cut portion 50D.

[0043] In addition, the second cut portion 50e in the end cut portion 50e 2 It is preferable that the main cut portion is substantially parallel to the main cut portion. Note that "substantially parallel" does not necessarily mean perfectly parallel, and an error of about ±10° is acceptable.

[0044] The outlet forming section 5 according to the present invention has a section 50P in which deformed cut sections 50D and non-cut sections 50U are alternately arranged at the widthwise end (the other end 5B in the illustrated example), which is the section that is most likely to tear and is the last to be torn in a typical 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. In such a section 50P in which deformed cut sections 50D and non-cut sections 50U are alternately arranged, when a typical opening operation is performed in which the area surrounded by the easy-to-tear line 50 is continuously pulled from one end 5A to the other end 5B, at the edge of the other end 5B, the end cut section 50e and the end 50t where no end cut section is provided overlap in the adjacent deformed cut section 50D, and in particular, Center of depthSince the deformed cut portion 50D located at the position is overlapped so that it is more outward in the width direction of the take-out opening forming portion 5, the end cut portion 50e that has already been cut is present at a position further outward in the width direction than the non-cut portion 50U in the pulling direction, and even if a small tear occurs in the packaging film when the non-cut portion 50U between the deformed cut portions 50D is torn open during the opening operation, the tear will continue to the end cut portion 50e of the adjacent deformed cut portion 50D that has already been torn, and the tear will not progress any further. Furthermore, since the ends of the adjacent deformed cut portions 50D are offset from each other in both the width direction and the depth direction, when a general opening operation is performed 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 non-cut portion 50U between them is twisted just before being cut, making it difficult for the film to tear or stretch. In this way, by forming a portion 50P in which the modified cut portion 50D and the non-cut portion 50U according to the present invention are alternately arranged at the end in the width direction (the other end portion 5B in the illustrated example), the package is easy to open and the risk of tearing during opening is reduced. In addition, since the end cut portion 50e is continuous with the main cut portion 50m at an angle of 90° or more, the cut opens smoothly from the end cut portion 50e to the main cut portion 50m. Furthermore, the first cut portion 50e 1 and the second cut portion 50e 2 If the angle between the blade and the cutter is 90° or more, the cut will open more smoothly.

[0045] In particular, in the case of a gourd-shaped shape having a narrow portion 51, a wide portion 52, and a curved convex portion 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 one having the above-mentioned preferred numerical range, the range of the easy-to-tear line constituting the edge portion of the curved convex portion 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 the portion 50P at the end where the deformed cut portion 50D and the non-cut portion 50U according to the present invention 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.

[0046] 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.

[0047] Here, a particularly preferred embodiment of the outlet forming portion 5 according to the present invention is a modified cut portion 50D that is located on a line extending in the width direction from the center C in the depth direction of the narrow width portion 51 as shown in FIG. 5, and that has end cut portions 50e that overlap the modified cut portion on both ends on the outside in the width direction. 2 In addition, the deformed cut portion 50D 2 The deformed cut portion 50D located further outward in the depth direction has an end cut portion 50e that overlaps only the end portion located in the depth direction outward from the center C of the narrow width portion 51 in the depth direction. 1In 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.

[0048] The ratio of the length of the deformed cut portion 50D and the non-cut portion 50U at the end of the outlet forming portion 5 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, and more preferably 7 mm or more and 13 mm or less. 1 and the second cut portion 50e 2 The lengths L9 of the non-cut portions 50U between the deformed cut portions 50D do not have to be the same, but are preferably 0.2 mm to 3.0 mm, more preferably 0.5 mm to 2.5 mm. Furthermore, the length L11 of the non-cut portion 50U between the deformed cut portions 50D is preferably 0.2 mm to 3.0 mm, more preferably 0.3 mm to 2.0 mm. Furthermore, the overlap width L12 between the end cut portion 50e and the end portion of the adjacent deformed cut portion where the end cut portion is not provided is not necessarily limited, but is preferably 0.2 mm to 3.0 mm, and more preferably 0.3 mm to 2.0 mm. In these ranges, 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.

[0049] In addition, the main cut portion 50m and the first cut portion 50e in the end cut portion 50e 1 and the angle ∠β between the first cut portion 50e 1 and the second cut portion 50e 2The angles ∠γ between the main cut portion 50m and the first cut portion 50e do not have to be the same, but they should be in the range of 90° or more. They should preferably be in the range of 100° or more, and more preferably be in the range of 120° or more. 1 Between and the first cut portion 50e 1 and the second cut portion 50e 2 It is preferable that the area between the main cut portion 50m and the end cut portion 50e is chamfered, and they do not have to be the same, and the curvature 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 opening of the deformed cut portion can proceed smoothly from the main cut portion 50m to the end cut portion 50e, or from the end cut portion 50e to the main cut portion 50m.

[0050] 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 a continuous cut part 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.

[0051] Here, the thickness of the packaging film 4 may be appropriately selected, but is preferably 20 to 75 μm as measured in accordance with JIS P 8118 (1998). If the thickness is 20 to 75 μm, the effect of the present invention can be particularly effectively exhibited. The thickness 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).

[0052] 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.

[0053] As long as the portion other than the portion arranged through the deformed cut portion 50D and the non-cut portion 50U is the perforation, the type is not limited. Examples 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 the 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 be simply referred to as a slit cut. Although perforations and slit cuts having non-cut portions are sometimes not distinguished, in the present invention, a slit cut is referred to as a slit cut when the normal straight cut portion is less than two pitches, that is, when normal cut portions of the same length are not consecutive twice, except for a unique shape such as the deformed cut portion 50D. Generally, a slit cut is formed with a cut portion longer than the perforation.

[0054] 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.

[0055] 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 53, 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.

[0056] 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.

[0057] In addition, the slit cut having the perforations and the non-cut portion of the easy-to-tear line 50, including the portion where the cut portion 50C and the half-cut portion are alternately arranged, can be formed in one operation, for example, by die cutting. EXAMPLES

[0058] Next, Examples 1 to 4 and Comparative Examples 1 and 2 of the present invention were prepared, and tests were conducted on the sagging of the sanitary tissue paper and the tearing of the opening and dispensing opening. The shape of the dispensing opening formation part of the packages according to Examples 1 to 4 and Comparative Example 1 is roughly gourd-shaped with a narrow part, a wide part, and a curved convex part as shown in Figures 1 to 5. The dispensing opening formation part of the package according to Comparative Example 2 is simply a straight line of perforation.

[0059] The bundle contained in the package in each example is a single-ply paper towel (product name: Rakura Cook Kitchen Paper, basis weight: 20 g / m 2 The packaging form for each example was a gusset packaging, in which the stretch direction of the packaging film was perpendicular to the width direction of the take-out opening.

[0060] 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.

[0061] 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."

[0062] 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.

[0063] [Table 1]

[0064] As can be seen from Table 1, in Examples 1 to 4, in which the edge of the end (curved convex portion) is made up of alternating deformed cut portions and non-cut portions, the maximum depthwise length of the outlet, i.e. the depthwise length of the curved convex portion which is the end, is as long as 35 mm, which is 30% of the depthwise range of the top surface of the bundle, making the configuration prone to tearing. Nevertheless, no tearing was observed at the end of the outlet during the opening operation.

[0065] In Comparative Example 1, the cut portion of the curved convex portion in Example 1 was replaced with a conventional cut portion without an end cut portion instead of a deformed cut portion, but in this Comparative Example 1, tearing occurred at the end of the outlet during the opening operation. Even in the case of an easily ruptured line that constitutes the edge of a very long curved convex portion as in the Examples, by arranging the deformed cut portion and the non-cut portion alternately, it was shown that tearing at the end of the outlet during the opening operation can be prevented.

[0066] 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 making the easy-to-tear line that forms the edge of the end portion an alternating arrangement of deformed cut portions and non-cut portions.

[0067] Regarding 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. In contrast, in Examples 1 to 4 and Comparative Example 1, the number of saggings was 0, and no sagging was confirmed. In other words, it was shown that the outlet formed by the shape of the outlet forming portion having a narrow portion, a wide portion, and a curved convex portion is particularly excellent in preventing sagging.

[0068] From the above, the packaging body of the present invention is a film-packaged packaging body that is easy to open as the edges of the width direction of the removal opening are less likely to tear when opened, and further has excellent ease of pulling out sanitary tissue paper, particularly hard sanitary tissue paper such as paper towels. [Explanation of symbols]

[0069] 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 formation part, 5A, 5B...longitudinal ends, 5T...free piece, 6...removal opening, 6E...edge of removal opening, 6H...recessed part of removal opening. 50…Easy tear line, 50D,50D 1 ,50D 2 ...Deformed cut section, 50m...Main cut section, 50e...End cut section, 50e 1 …First cut, 50e 2 ...Second cut portion, 50t...End portion of the deformed cut portion where no cut portion is provided, ∠β...Angle between the main cut portion and the first cut portion, ∠γ...Angle between the first cut portion and the second cut portion, 50C...Cut portion, 50U...Non-cut portion (tie portion), 50P...Part where the deformed cut portions and non-cut portions are alternately arranged, 51...Narrow width portion, 51A...Approximately trapezoidal edge piece, 52...Wide width portion, 53...Curved convex portion, ∠α...Taper angle of the wide width portion. Q...Overlapping portion. L1...widthwise (longitudinal) length of the outlet forming portion, L2...widthwise (longitudinal) length of the top surface of the bundle, L3...maximum depthwise (shortitudinal) length of the outlet forming portion, L4...depthwise (shortitudinal) length of the top surface of the bundle, L5...widthwise (longitudinal) length of the narrow portion, L6...depthwise (shortitudinal) 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 first cut portion and the second cut portion, L10...range from the middle of the widening portion on one side in the depth direction to a position beyond the outer end of the curved convex portion, L11...length of the non-cut portion between the deformed cut portions, L12...overlap width with the end portion of the adjacent deformed cut portion where no cut portion is provided. 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 easy-to-tear line constituting the edge of at least one end in the width direction of the outlet forming portion is A modified cut portion in which a L-shaped end cut portion is connected at an angle of 90° or more to one end or both ends of a main cut portion has perforations aligned through a non-cut portion, The end cut portion is arranged so as to overlap with an end portion of another adjacent deformed cut portion where the end cut portion is not provided at least one of the outer side and the center side in the width direction of the outlet forming portion, and The overlap between the end cut portion and the end portion where the end cut portion is not provided is The deformed cut portion located at the center of the outlet forming portion in the depth direction is overlapped with the outlet forming portion in the width direction so as to be on the outer side. A package comprising:

2. 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; 2. The package according to claim 1, wherein only a portion constituting an edge of at least one of the curved convex portions of the easy tear-open line has perforations in which deformed cut portions and non-cut portions are arranged alternately.

3. 3. The package according to claim 2, 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. 3. The package according to claim 2, 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 2 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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