Packaging

Abstract

To provide a film-packaged package that is excellent in performance of extracting sanitary tissue papers.SOLUTION: A package, in which a bundle of sanitary tissue papers is packaged with a packaging film made of soft resin, has an extraction port formation part formed by annularly arranging an easy-to-open cutting line on an upper surface thereof. The extraction port formation part is formed to have a narrowed portion extending in a width direction at a central part in a depth direction, a widened portion, leading to an end portion of the narrowed portion, which is gradually widened as separating from the narrowed portion toward outside in the width direction, and a curved convex portion, leading to the widened portion, which swells out convexly toward outside in the width direction, where a length in the width direction of the curved convex portion is 70% or more of a width of the upper surface and the maximum length in the depth direction thereof is 10-40% of a length in the depth direction of the upper surface, a length in the width direction of the narrowed portion is 50-70% of the length of the upper surface, and a length in the depth direction of the narrowed portion is 0.5-10% of the length in the depth direction of the upper surface.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 a long and narrow ring shape extending in the longitudinal direction using a die-cutting technique or the like, and the opening of the outlet is made wide in the depth direction, like an oval (see Patent Documents 1 and 2 below). Also, in order to further improve the ease of taking out the contents, the outlet has been made 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 the difference in paper quality. Simply making the removal opening wider in the depth direction makes it very likely that problems with removal will occur, such as poor pop-up, where the next piece of sanitary tissue paper does not pop up but falls down when popped up, or poor standing, where the paper falls over rather than standing up on the top surface of the package. [Prior art documents] [Patent documents]

[0007] [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]

[0008] In view of the above problems, a main object of the present invention is to provide a package that has excellent pull-out properties for sanitary thin paper, particularly for hard sanitary thin paper such as paper towels. [Means for solving the problem]

[0009] The means for solving the above problems are as follows. The first means is, The film-wrapped tissue is a bundle of sanitary tissue papers 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 is 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, Its widthwise length is 70% or more of the widthwise length of the upper surface, its maximum depthwise length is 10 to 40% of the depthwise length of the upper surface, the widthwise length of the narrow portion is 50 to 70% of the widthwise length of the upper surface, and the depthwise length of the narrow portion is 0.5 to 10% of the depthwise length of the upper surface. The present invention relates to a film-wrapped tissue.

[0010] The second method is In the film-wrapped tissue according to the first means, 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. Effect of the Invention

[0011] According to the present invention, a package having excellent pull-out properties for sanitary tissue paper, particularly for hard sanitary tissue paper such as paper towels, is provided. [Brief description of the drawings]

[0012] [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] 13 is a partially enlarged view for explaining a take-out opening forming portion having a deformed cut portion. FIG. [Figure 6] 13 is a partially enlarged view for explaining another outlet forming portion having a deformed cut portion. FIG. [Figure 7] 13 is a partially enlarged view for explaining a take-out opening forming portion having a convex cut portion. FIG. [Figure 8] 13 is a partially enlarged view for explaining another embodiment of the convex cut portion. FIG. [Figure 9] 13 is a perspective view for explaining a usage mode of a package having an outlet forming portion with a convex cut portion. FIG. [Figure 10] 13 is a partially enlarged view for explaining a take-out opening forming portion having a half-cut portion. FIG. [Figure 11] 4A and 4B are a front view and a cross-sectional view for explaining a half-cut portion. [Figure 12] 13A and 13B are diagrams for explaining another example of the outlet forming portion. [Figure 13] FIG. 13 is a diagram for explaining tearing that occurs when an outlet is formed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of the present invention will be described with reference to Figs. 1 to 12 and Fig. 13 showing a comparative embodiment. 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.

[0014] 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.

[0015] 1 to 4 show an embodiment of gusset packaging. The gusset packaging of this embodiment is a pillow packaging with a gusset, in which the bundle 3, which is the 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 the 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 another appropriate packaging form such as an overlapping packaging, also called a caramel packaging, in which the short side surface is configured by overlapping and fusing flaps.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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 number of plies is 100 to 500 μm. The mass per set is preferably 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 with such a number of plies, basis weight, and thickness is highly effective in improving pop-up defects in which the next sanitary thin paper does not rise up but falls down when popped up, and standing defects in which the next sanitary thin paper does not rise up but falls down on the upper surface of the package, due to the characteristic shape of the take-out opening forming portion having the narrow portion, the wide portion, and the curved convex portion, which is the configuration of the present invention.

[0020] 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.

[0021] 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.

[0022] 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%.

[0023] 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.

[0024] The take-out opening forming section 5 of the packaging body 1 according to the present invention 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 packaging body 1. In the packaging body 1 according to the present invention, since the stack 3 is a pop-up type, when one sheet of the 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.

[0025] Here, the outlet forming section 5 of the packaging body 1 according to the present invention characteristically has a narrow portion 51 extending in the width direction at the depthwise center of the upper surface 4C, a widened portion 52 that is continuous with the end of the narrow portion 51 and gradually widens as it moves away from the narrow portion 51 toward the widthwise outward side of the bundle 3, and a curved convex portion 53 that is continuous with the widened portion 52 and bulges outward in the widthwise direction of the bundle 3. In particular, 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.

[0026] The outlet 6 formed by this outlet forming section 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 portion 51 to the wide portion 52, so that when a set of sanitary thin paper sheets 2 is pulled out from the stack 3, the edge piece 51A is deformed so as to be slightly turned up in the direction of pulling out, and as shown in Fig. 4, the edge piece 51A leans against and supports the next set of sanitary thin paper sheets 2 that are exposed. The outlet forming section 5 according to the present invention in the above range has a shape that has the wide portion 52 that continues from the narrow portion 51, which is very narrow in the depth direction, to the curved convex portion 53, which is very wide in the depth direction, so that the free edge piece 51A formed near the edge of the narrow portion 51 is very wide and large in the outlet 6. Therefore, when the sanitary thin paper sheets 2 are pulled out, the narrow portions 51 can be opened widely, and the sanitary thin paper sheets 2, which have a relatively high rigidity, can be pulled out smoothly when they are pulled out from the stack 3. Furthermore, the edge piece 51A firmly rests against the highly rigid sanitary thin paper 2, enhancing the effect of preventing sagging. Because the portion related to the narrow width portion 51 opens widely, even in a packaging form in which a clear fold line is difficult to form at the boundary between the short side surface 4A and the top surface 4C, such as 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 likely to be kept 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.

[0027] In addition, the outlet forming section 5 of the configuration according to the present invention has a curved convex portion 53 that is wide in the depth direction, so that the edge of the curved convex portion 53 is long, and a deep recessed portion 6H is formed between the widened portion 52 of the outlet forming section 5 and the curved convex portion 53 when the outlet 6 is formed. Therefore, the root portion 2R of the next sanitary thin paper, which is partially exposed from the outlet 6 following the sanitary thin paper pulled out from the bundle 3, is deformed so as to be gently rolled along the edge 6E of the curved convex portion 53. Since the sanitary thin paper 2 has high rigidity, it is difficult to break, so that the gentle rolling increases the uprightness. Furthermore, the root portion 2R of the next sanitary thin paper, which is partially exposed from the outlet 6, fits into the deep recessed portion 6H, so that the uprightness is further increased. In this way, in the outlet forming section 5 according to the present invention, the above-mentioned action makes it difficult for pop-up defects caused by the inside of the packaging film of the sanitary thin paper to occur, which is said to be likely to occur when the sanitary thin paper has high rigidity. This effect is particularly effective when combined with the sanitary thin paper having the above-mentioned suitable basis weight and thickness, and further with a suitable packaging film as described below.

[0028] The widened portion 52 is particularly This becomes the edge of the widened portion 52. It is preferable that the angle of the easy splitting line 50 is gradually increased toward the outside of the bundle 3 in the width direction. The angle between the line connecting both ends of the easy splitting line 50 and the width direction. The taper angle ∠α is preferably 25 to 60 degrees.

[0029] Furthermore, 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.

[0030] 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.

[0031] 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.

[0032] 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).

[0033] 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.

[0034] Here, the thickness 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 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).

[0035] In addition, in the package 1, it is preferable that the softness of the packaging film 4 is less than that of the sanitary thin paper 2. When the softness of the packaging film is less than that of the sanitary thin paper 2, the effects of the present invention can be particularly effectively exhibited.

[0036] The easily rupturable line 50 constituting the outlet forming section 5 according to the present invention can be a perforation, a slit cut having an uncut section (non-cut section), or the like. However, it is not limited thereto. As long as the cut section 50C and the non-cut section 50U are alternately arranged, the type of the perforation is not limited. Examples of the perforation include a normal perforation in which the cut section 50C is a straight line, a micro perforation in which the cut section is a hole, and a zipper perforation in which the cut section is Y-shaped, approximately L-shaped, <-shaped, or the like. The slit cut is a part in which the film is cut into a slit shape, but by having a non-cut section, the non-cut section and the cut section are arranged alternately. Note that the slit cut having a non-cut section may be simply referred to as a slit cut. The perforation and the slit cut having a non-cut section may not be distinguished, but in the present invention, the slit cut is referred to as a slit cut when the cut section is less than two pitches, that is, when the cut section of the same length is not consecutive twice. In general, the slit cut is formed so that the length of the cut section is longer than the perforation.

[0037] The cut-tie ratio of a slit cut having perforations or non-cut portions is determined at an appropriate interval depending on the ease of tearing of the film used, but the length of the cut portion should be designed appropriately within the range of 0.8 mm or more and 20.0 mm or less, and the length of the non-cut portion (tie portion or uncut portion) should be designed appropriately within the range of 0.3 mm or more and 5.0 mm or less.

[0038] Here, as shown in FIG. 13(a), in the outlet forming portion 105 formed by arranging the perforations 150 in a ring shape using a die cutting or other molding technique, there is an advantage that an outlet can be easily formed by cutting and peeling off the range 105Z within the ring perforations from one end 105A in the longitudinal direction X toward the other end 105B as shown in FIG. 13(b). However, when performing such an opening operation, as the perforations 150 approach the perforations 150e at the other end that are last to be cut off at the other end 105B, the direction in which the perforations 150 tear open becomes closer to a direction perpendicular to the direction in which the range 105Z within the ring perforations is pulled. Therefore, as shown in FIG. 13(c), the tearing of the perforations 150 does not occur smoothly and continuously at this end, particularly near the perforations 150e at the end of the other end 105B, and it is conceivable that an unintended tear 105P will occur at the end of the outlet 106 as shown in FIG. 13(d). Furthermore, as the widthwise end of the outlet forming portion 105 is widened in the depth direction Y, the range of the perforations that approaches a direction perpendicular to the cutting and peeling direction becomes longer, making this tearing more likely to occur.

[0039] In order to reduce the risk of such tearing, in the outlet forming section 5 according to the present invention, the edge portion 50P of at least one end portion in the width direction of the outlet forming section 5 (the other end portion 5B in the illustrated example) is formed by alternating a deformed cut portion 50D having an end cut portion 50e and a non-cut portion 50U at one end or both ends, as shown in particular in Figs. 5 and 6. 1In particular, it is desirable that 80% or more, preferably 90% or more, and particularly preferably 95% or more of the area constituting the edge of the curved convex portion 53 is the area 50P where the deformed cut portions 50D and the non-cut portions 50U are alternately arranged. Alternatively, the entire area of ​​the curved convex portion 53 may be formed of an easy-to-tear line where the deformed cut portions 50D and the non-cut portions 50U are alternately arranged.

[0040] 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 provided. 3 There may be.

[0041] Further, a portion 50P in which the deformed cut portion 50D and the non-cut portion 50U are alternately arranged is provided. 1 As for the arrangement form of the deformed cut portion 50D in the embodiment, 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, the ends of the end cut portion 50e facing the width direction outer side of the upper surface of the bundle 3 and the ends facing the width direction center of the upper surface of the bundle 3 may be mixed. 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.

[0042] When a typical opening operation is performed by continuously pulling from one end 5A to the other end 5B within the range surrounded by the easy-to-tear open line 50, a deformed cut portion 50D and a non-cut portion 50U are alternately arranged at the end (the other end 5B in the illustrated example) at a portion 50P. 1 In the case where the adjacent end cut parts 50e of the adjacent deformed cut parts 50D are both directed toward the outer side in the width direction of the upper surface of the bundle 3, or toward the center in the width direction of the upper surface of the bundle 3, the extension directions of the adjacent end cut parts 50e are in a direction that crosses in a direction that approaches each other, so that the non-cut part 50U between them is easily cut. Also, when one of the adjacent end cut parts 50e of the adjacent deformed cut parts 50D is directed toward the outer side in the width direction of the upper surface of the bundle 3 and the other is directed toward the center in the width direction of the upper surface of the bundle 3, when a general opening operation is performed by continuously pulling from one end 5A to the other end 5B within the range surrounded by the easy-to-tear opening line 50, the non-cut part 50U between them is easily cut without tearing or stretching because a twist occurs just before cutting. Similarly, when there is an end cut portion 50e at one of the adjacent ends of adjacent deformed cut portions 50D and no end cut portion 50e at the other, when a typical opening operation is performed by continuously pulling from one end 5A to the other end 5B within the range surrounded by the easy-to-tear opening line 50, the non-cut portion 50U between them is easily cut without tearing or stretching the film because a twist occurs just before cutting. In this way, a portion 50P where deformed cut portions 50D and non-cut portions 50U are alternately arranged is formed at the end in the width direction (the other end 5B in the illustrated example). 1 By forming this, the risk of tearing when opening the package is reduced.

[0043] In addition, in the outlet forming portion 5 according to the present invention, the deformed cut portion 50D and the non-cut portion 50U are alternately arranged in a portion 50P. 1In this case, the position of the end of modified cut portion 50D is slightly shifted widthwise inward or outward from the extension direction of main cut portion 50m by end cut portion 50e, so that when the outlet 6 is formed, the portion that was the uncut portion 50U becomes slightly convex and forms a serrated edge. Therefore, when a set of sanitary thin paper 2 is pulled out from the stack 3, this serrated 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 and partially exposed from the outlet, improving prevention of the sanitary thin paper 2 from falling.

[0044] Here, as shown in FIG. 5, it is particularly preferable that the modified 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 51, and the modified cut portion 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 51 in the depth direction. 1 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.

[0045] When the deformed cut portion 50D is provided at the end of the outlet forming portion 5, the ratio of the length to 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.

[0046] The angle ∠β 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 main cut portion 50m to the end cut portion 50e is rounded. 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 modified cut portion is likely to open smoothly from the main cut portion 50m to the end cut portion 50e.

[0047] On the other hand, in the outlet forming section 5 according to the present invention, in order to reduce the risk of tearing when opening, the edge portion 50P of at least one end portion in the width direction of the outlet forming section 5 (the other end portion 5B in the illustrated example) is configured such that the easy-to-tear opening line 50 is a convex cut portion 50T having a tapered convex shape on the outer side in the width direction and a non-cut portion 50U connecting the base ends of the convex cut portions are alternately arranged, as shown in particular in FIG. 7 and FIG. 2 In particular, 80% or more, preferably 90% or more, and particularly preferably 95% or more of the area constituting the edge of the curved convex portion 53 is the area 50P where the convex cut portion 50T and the non-cut portion 50U are alternately arranged. 2The entire area of ​​the curved convex portion 53 may be configured as an easily cleavable line in which convex cut portions 50T and non-cut portions 50U are alternately arranged. Although not shown, the convex cut portion may have a shape in which a plurality of convex shapes are connected and continuous at the base end. The number of continuous convex shapes is not necessarily limited, but is preferably about 2 to 5. The portion 50P in which the convex cut portions and non-cut portions are alternately arranged may be configured as an easily cleavable line in which the convex cut portions and non-cut portions are alternately arranged. 2 The convex cut portion may include a single convex shape and a convex cut portion having a continuous convex shape.

[0048] The shape of the convex cut portion 50T may be any shape tapered on the widthwise outer side, and may be a V-shape having one apex as shown in FIG. 7, a U-shape as shown in FIG. 8(a), or a trapezoidal shape as shown in FIG. 8(b). The tapered widthwise outer side means that the tip of the convex cut portion 50T does not face the depth direction Y or the widthwise center side. Preferably, the tip of the convex cut portion 50T has an angle ∠γ with respect to the depth direction Y of 15° or more, preferably 30° or more, and more preferably 45° or more. The opening angle ∠Δ of the tip of the convex cut portion 50T is not necessarily limited as long as it is less than 180°, but is preferably 15 to 120°, more preferably 20 to 90°, and even more preferably 30 to 60°.

[0049] When the easy-to-crack line 50 is torn and continuously pulled from one end 5A to the other end 5B, the edge of the other end 5B having the convex cut portion 50T has the already cut convex cut portion 50T at a position on the widthwise outer side that precedes the non-cut portion 50U between the base ends of the convex cut portions 50T in the pulling direction, so that even if a small tear occurs in the packaging film when the non-cut portion 50U between the base ends of the convex cut portions 50T is torn during the opening operation, the tear will continue to the already torn convex cut portion 50T immediately afterwards and will not progress any further. In this way, by forming a portion 50P in which the convex cut portion 50T and the non-cut portion 50U connecting the base ends of the convex cut portions are alternately arranged at the end in the width direction (the other end 5B in the illustrated example), the risk of tearing is significantly reduced.

[0050] As shown in FIG. 9, the portion 50P is configured by alternately arranging the convex cut portion 50T tapered toward the outside in the width direction and the non-cut portion 50U connecting the base end portions of the convex cut portion 50T. 2 When the take-out opening 6 is formed, the protruding pieces 6T form a jagged sawtooth edge with multiple protruding pieces 6T. When a set of sanitary thin paper 2 is taken out from the bundle 3, these protruding pieces 6T are turned up in the direction in which the sanitary thin paper 2 is taken out, so that the sanitary thin paper 2 is rolled up along the edge 6E of the take-out opening 6, such as the part that was the curved protruding part 53, and is not prevented from deforming into a shape with high uprightness. In addition, the sanitary thin paper 2 can be taken out smoothly. On the other hand, the protruding pieces 6T function as a return for the root part 2R of the next set of sanitary thin paper 2 that is partially exposed from the take-out opening following the taken-out sanitary thin paper, contributing to preventing it from falling. Furthermore, the edge in the width direction of the sanitary thin paper 2 is sandwiched between the protruding pieces, further improving the prevention of falling.

[0051] The height L12 from the base end side to the tip of the convex cut portion 50T is preferably 0.1 mm or more. The upper limit is not necessarily limited, but is preferably within a range not exceeding 10 mm. The preferred height of the convex cut portion is 0.5 to 7 mm, more preferably 1 to 5 mm. A low height convex cut portion of less than 1.0 mm can be formed by a technique also called microwave cutting. Such a low height convex cut portion 50T has a design in which the unevenness of the sawtooth edge of the outlet 6 formed by the portion in which the convex cut portion 50T and the non-cut portion 50U connecting the base ends of the convex cut portions are alternately arranged is not noticeable.

[0052] The ratio of the length L13 between the base ends of both ends of the convex cut portion 50T and the length L14 of the non-cut portion 50U between the base ends of the adjacent convex cut portions 50T is not necessarily limited, but the length L13 between the base ends of both ends of the convex cut portion 50T is 5 mm or more and 20 mm or less, preferably 7 mm or more and 13 mm or less, and the length L14 of the non-cut portion 50U is in the range of 0.3 mm or more and 3 mm or less, preferably 0.7 mm or more and 1.3 mm or less. Within this range, unintended tears do not occur and smooth, continuous cleavage is likely to proceed.

[0053] On the other hand, in the outlet forming section 5 according to the present invention, in order to reduce the risk of tearing when opening the container, the edge portion 50P of at least one end portion (the other end portion 5B in the illustrated example) in the width direction of the outlet forming section 5 is configured by alternating cut portions 50C and half cut portions 50H, as shown in particular in FIGS. 10 and 11. 3 In particular, 80% or more, preferably 90% or more, and particularly preferably 95% or more of the area constituting the edge of the curved convex portion 53 is the area 50P where the cut portions 50C and the half-cut portions 50H are alternately arranged. 3 The entire area of ​​the curved convex portion 53 may be configured as an easy-to-crack line in which the cut portions 50C and the half-cut portions 50H are alternately arranged.

[0054] As shown in Fig. 11(a) as a plan view and in Fig. 11(b) as a cross section thereof, the cut portion 50C is a portion completely cut in the thickness direction Z of the packaging film 4 from the front side 41, which is the surface that does not face the bundle 3, to the back side 42, which is the surface that faces the bundle 3, and the half-cut portion 50H is a portion that is not completely cut, but is cut to a predetermined depth range L15 in the thickness direction Z from the front side 41 to the back side 42. In this way, in a portion where the cut portions 50C and the half-cut portions 50H are alternately arranged, the tearing proceeds more smoothly and continuously when the easy-to-tear line is torn, compared to a portion where the cut portions 50C and the non-cut portions 50U, which have no cuts, are alternately arranged. This is because the difference in force required to tear the packaging film 4 is smaller between the cut portion 50C and the half-cut portion 50H than between the cut portion 50C and the non-cut portion 50U, so the tearing tends to proceed continuously and smoothly from the cut portion 50C to the half-cut portion 50H and from the half-cut portion 50H to the cut portion 50C. Therefore, even if the opening forming portion 5 is pulled continuously from one end 5A to the other end 5B when opening, there is little risk of the packaging film 4 tearing unintentionally at the other end 5B that is cut off last.

[0055] Here, the half-cut portion 50H is desirably cut to a depth of 20% or more of the thickness L16 of the packaging film. If the half-cut portion 50H is cut to a depth of 20% or more, a continuous and smooth tear can be sufficiently generated between the cut portion 50C and the half-cut portion 50H when forming a removal opening by an opening operation. There is no upper limit to the depth of the cut, but if it is set to 80% or less, more preferably 60% or less, unintended tearing is less likely to occur.

[0056] The ratio of the length of the cut portion 50C and the half-cut portion 50H at the end of the outlet forming portion 5 is not necessarily limited, but the length of the cut portion 50C is preferably in the range of 5 mm to 20 mm, and more preferably 7 mm to 13 mm, and the length of the half-cut portion 50H is preferably in the range of 0.3 mm to 3 mm, and more preferably 0.7 mm to 1.3 mm. Within this range, the cleavage proceeds smoothly and continuously from the cut portion 50C to the half-cut portion 50H and from the half-cut portion 50H to the cut portion 50C, and unintended cleavage is unlikely to occur.

[0057] In addition, in the easy-to-tear line 50 that forms the edge of the outlet forming portion of the present invention, the deformed cut portions 50D, the convex cut portions, and even the cut portions at the perforations other than the end portions may be half-cut portions.

[0058] On the other hand, in the easy-to-tear line 50 constituting the edge of the outlet forming portion, the deformed cut portion 50D and the non-cut portion 50U are alternately arranged in a portion 50P. 1 The cut portions 50T and the non-cut portions 50U may be arranged alternately at the portions 50P. 2 The cut portions 50C and the half-cut portions 50H may be arranged alternately at both ends of the outlet forming portion 5, or at only one end. 3 The end 50P may be provided at both ends of the outlet forming portion 5, or may be provided at only one end. 1 ,50P 2 ,50P 3 is formed only on one end, the opposite end can be a continuous cut portion in a range L10 from the middle of the widened portion 52A on one side in the depth direction to a position beyond the outer end 53t of the curved convex portion 53A, as shown in Fig. 12(a). In this way, as shown in Fig. 12(b), a free piece 5T is formed in a range from one depth side to the outer end at one end 5A of the outlet forming portion 5, making it easier to pinch and turn up the free piece 5T, making the opening operation easier.

[0059] In addition, since the edge of narrow portion 51 according to the present invention extends in the same direction as the pulling direction from one end 5A to the other end 5B during the opening operation, it is preferable to configure it with perforations having uncut portions rather than half-cut portions. This is preferable because the edge of narrow portion 51 is less likely 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, Examples 1 to 5 of the present invention and Comparative Example 1 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 5 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 1 is simply a straight line of perforation.

[0062] 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.

[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] As shown in Table 1, in Comparative Example 1, 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 5, 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] Furthermore, in Examples 1 to 4, in which the edge of the end (curved convex portion) is made up of alternating cut portions and half-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.

[0069] In Example 5, the cut portions between the curved convex portions in Example 1 are replaced with conventional non-cut portions instead of half-cut portions, but in this Example 5, some cracks were confirmed at the end of the outlet during the opening operation. In the case of an easily crackable line that constitutes the edge of a very long curved convex portion as in Examples 1 to 4, it was also confirmed that the opening operability can be improved by arranging the cut portions and half-cut portions alternately in that portion.

[0070] As described above, the package according to the present invention is a film package that is difficult to tear at the edge in the width direction of the take-out opening when opened, and has excellent openability. [Explanation of symbols]

[0071] 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, 6T...convex piece, 6H...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 section, 50m...Main cut section, 50e...End cut section, R...Curvature of L-shaped section, 50C...Cut section, 50U...Non-cut section (tie section), 50T...Convex cut section, 50P...Edge of end of outlet forming section, 50P 1 ...A part where deformed cut parts and non-cut parts are arranged alternately, 50P 2 ...A part where convex cut parts and non-cut parts are arranged alternately, 50P 3 ...portion where cut portions and half 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, ∠β...opening angle of the L-shaped portion, ∠γ...angle of the orientation of the convex cut portion relative to the depth direction, ∠Δ...angle of the tip of the convex cut portion. L1: width (longitudinal) length of the outlet forming portion 5, L2: width (longitudinal) length of the top surface of the bundle, L3: maximum depth (short) length of the outlet forming portion 5, L4: depth (short) length of the top surface of the bundle, L5: width (longitudinal) length of the narrow portion, L6: depth (short) length of the narrow portion, L7: bulging length of the curved convex portion in the width direction, L8: length of the deformed cut portion; L9: length of the end cut portion; L10: range from the middle of the widening portion on one side of 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: height of convex cut portion, L13: length between base ends of convex cut portions, L14: length of non-cut portion between convex cut portions. L15: Depth of half cut part, L16: Thickness of packaging film, 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 is formed by arranging an easy-to-tear line in an annular manner on the upper surface of the packaging body, The outlet forming portion is 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, the width direction length is 70% or more of the width direction length of the upper surface of the bundle, the maximum depth direction length is 10 to 40% of the depth direction length of the upper surface of the bundle, the width direction length of the narrow portion is 50 to 70% of the width direction length of the upper surface of the bundle, and the depth direction length of the narrow portion is 0.5 to 10% of the depth direction length of the upper surface of the bundle, The easily splitting line that is the edge of the widened portion is arranged so that the angle gradually increases toward the outside of the bundle in the width direction, and the taper angle between the line connecting both ends of the easily splitting line that is the edge of the widened portion and the width direction is 25 to 60 degrees. A package comprising:

2. 2. 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.

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