TW202239363A - Packaging body - Google Patents

Abstract

To provide a film packaging body that is for sanitary tissue paper and that ensures easy cleavability. The above problem is solved by a packaging body in which a bundle of sanitary tissue paper is packaged with a supple resin packaging film, and which has a slot forming section that is formed by disposing an annular easily-cleavable line in the top surface thereof. The easily-cleavable line constituting at least one end of the slot forming section in the width direction is formed by perforations in which non-cut parts and irregularly-shaped cut parts each having an end cut portion where a V-shaped incision is formed at one or both ends of the cut end portion are alternately arranged.

Description

Package

The present invention relates to a package packaged in a flexible packaging film by folding and stacking bundles of sanitary thin papers such as paper towels (also referred to as a bundle of sanitary thin papers).

As a packaging form of sanitary tissue such as paper towels and facial tissues, there is known a form in which so-called pop-up bundles are packaged with a resin-made flexible packaging film. ; This removable bundle is formed by folding and stacking one sheet or multiple layers (ply) of toilet tissue, and if one sheet at the uppermost position is pinched and pulled out, a part of the next sheet will be were pulled out together.

Conventionally, in the packaging body of such sanitary tissue paper, the perforation for forming the outlet is generally formed as a simple linear perforation to form a slit-shaped outlet on the top surface of the package. However, for the slit-shaped outlet, if the slit size is set to be long, then when the number of sheets remaining inside becomes small, there will be a problem that the sheets will fall into the inside; If it is set to be short, it is not easy to pull out the first sheet after opening, and the pull-out resistance at the beginning of use and the end of use will be too high, so that when the sheet is to be pulled out, it will be pulled out together with the packaging film. Pulling up causes a problem that extraction cannot be performed.

Therefore, the following technology (Patent Documents 1 and 2 below) is implemented to improve the problem of the slit-shaped outlet: by cutting technology such as die cutting (die cut) to form the outlet The perforation is arranged in an elongated ring shape extending in the longitudinal direction and has a width in the depth direction to form a substantially elliptical outlet. Furthermore, in recent years, in order to further improve the take-out property, it is also practiced to widen the edge part of the width direction of the take-out opening and to make it into a substantially gourd shape.

However, the conventional generally oval-shaped or roughly gourd-shaped outlets are mainly designed for sanitary thin paper such as facial tissue, which is mainly used for blowing the nose or wiping the corners of the mouth when eating, etc. Softness and elasticity are important for facial cleansing, so it is not necessarily suitable for sanitary tissue such as paper towels. This paper towel is mainly used for wiping hands after washing hands, and compared with tissue paper and facial surface Paper, the paper towel has high rigidity, and the facial tissue has "thick and strong unbreakable quality" and is easy to use for cleaning and wiping of skin other than the face, and cleaning and wiping of articles.

In order to make this kind of toilet tissue paper easy to take out, it is considered to widen in the depth direction to form a take-out opening. However, due to the difference in paper quality, high-rigid toilet tissue paper is not easy to be compared with facial tissues that are excellent in softness and elasticity. It is designed in the same way, so if simply widening the depth direction of the outlet, it is very easy to cause poor extraction when the next piece of sanitary tissue cannot be pulled up and fall, and there is no vertical position on the top surface of the package. Standing up and falling down is bad.

On the other hand, in the substantially elliptical take-out opening forming portion shown in FIG. In 105, as shown in FIG. 9(b), there is an advantage of peeling off the inner range 105Z of the annular hole from one end 105A toward the other end 105B in the longitudinal direction X to form a simple removal port. However, if this unsealing operation is carried out, the direction in which the eyelet 150 is gradually split is pulled relative to the direction in which the range 105Z in the ring-shaped eyelet is pulled as it approaches the eyelet 105e at the other end that is peeled off last on the other end portion 105B. The closer to the orthogonal direction, so as shown in Figure 9 (c), at this end, especially at the other end 105B, the splitting of the eyelet 150 near the eyelet 105e cannot be carried out smoothly and continuously, and may be as As shown in FIG. 9( d ), an unintentional break 105P may be generated at the end of the extraction port 106 . In the take-out opening forming portion 105 formed by arranging the holes 150 in a ring shape, as the end portion in the width direction is widened toward the depth direction Y, the range of the holes in the direction perpendicular to the peeling direction becomes longer. , so this gap is easy to occur. Therefore, the crack 105P is likely to occur in the substantially gourd-shaped take-out opening forming portion whose end portion is widened, and the like.

Furthermore, especially when the packaging film is a uniaxially stretched film extending in the direction Y perpendicular to the longitudinal direction X of the outlet forming portion 105 , such a tear 105P is more likely to occur. In particular, for pillow packaging and gusset packaging, the longitudinal direction (MD direction, Machine Direction, machining direction) of the packaging film is generally set to be the part where the outlet is formed. The direction of the long side is parallel, so it is easy to produce this kind of crack.

[Prior Art Literature] (patent documents) Patent Document 1: Japanese Patent Laid-Open No. 2018-052559 Patent Document 2: Japanese Patent Laid-Open No. 2018-058654

[Problem to be solved by the invention] Therefore, the main problem to be solved by the present invention is to provide a packaging body of a packaging film in view of the above-mentioned problems. Tissue paper, especially rigid sanitary tissue such as paper towels, has excellent pull-out properties.

[Technical means to solve the problem] Means for solving the above-mentioned problems are as follows. The first aspect of the present invention is a package that wraps a bundle of sanitary tissue paper with a flexible resin packaging film, and is characterized in that it has a take-out opening forming part that can easily tear the wire loop. Formed by being arranged on the top surface of the package; And, the easy-to-crack line constituting the edge of at least one end portion in the width direction of the take-out opening forming portion is a perforation in which deformed cut portions and non-cut portions are alternately arranged, and the deformed cut portion has an end cut. It has a part cut into a ㄑ shape at one end or both ends.

The second means relates to the package of the above-mentioned first means, wherein the size of the end cut portion of the deformed cut portion is 0.5 to 2.5 mm, and the size of the non-cut portion between the deformed cut portions is 0.2 to 1.0 mm. .

The third means relates to the package according to the above-mentioned first means or second means, wherein the opening forming part has a shape having a widened part, a widened part, and a curved convex part, and the widened part is located at the center in the depth direction. The widened portion extends along the width direction, the widened portion is continuous at the end of the widened portion and gradually becomes wider as it moves outward in the width direction away from the widened portion, the curved convex portion is continuous with the widened portion and Bulging outward toward the width direction into a convex shape; In addition, the edge portion of at least one of the curved protrusions constituting the easy-to-split line has holes in which deformed cut portions and non-cut portions are alternately arranged, and the deformed cut portion has one or both ends. Formed in the shape of ㄑ.

The fourth means is the package according to the third means, wherein more than 80% of the portion constituting the edge of the curved convex portion is formed by holes in which the deformed cut portions and non-cut portions are alternately arranged.

A fifth means is the package according to the third means or the fourth means, wherein the deformed cut part has an end cut part at an end located further outside in depth than the center of the widened part in the depth direction.

A sixth means is the package according to the above-mentioned third means or fourth means, wherein the end of the cut end part is directed toward the center side in the width direction of the top surface.

A seventh means is the package body according to the third means or the fourth means, wherein the end of the cut end portion faces outward in the width direction of the top surface.

The eighth means relates to the package of the third means or the fourth means, wherein the perforations of the deformed cut parts and the non-cut parts are arranged alternately, and the cut parts are only cut at the ends located at both ends in the depth direction of the top surface. The end of one end faces toward the width direction outer side of the top surface, and the end of the other end cut portion faces the width direction center side of the top face.

A ninth means is the package according to the third means or the fourth means, wherein the dimension of the curved protrusion in the depth direction is 25 to 45 mm, and the bulging dimension in the width direction is 2.5 to 12.5 mm.

The tenth means is the package body of the above-mentioned third means to the ninth means, wherein the dimension of the opening forming part in the width direction is 70% or more of the dimension in the width direction of the top surface of the bundle, and the largest dimension in the depth direction is It is 10% to 40% of the dimension in the depth direction of the top surface of the bundle; and, the dimension of the narrowed part in the width direction is 50% to 70% of the dimension in the width direction of the top surface of the bundle, and the dimension in the depth direction It is 0.5% - 10% of the size of the depth direction of the top surface of the bundle.

[Effect of the invention] According to the present invention, there is provided a film-wrapped package, which has excellent unsealing performance because it is less likely to be cracked at the edge of the width direction of the outlet when it is opened, and has excellent performance for sanitary tissue paper, especially hard sanitary tissue paper such as paper towels. pull-out.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 8 . In addition, directions such as the up-down direction and the left-right direction in the present invention and this specification will change according to the orientation of the package, and do not represent the absolute direction of space. Also, rigidity is sometimes referred to as toughness, rigidity, and firmness of paper.

The packaging body 1 of the present invention is a packaging body formed by wrapping a bundle 3 of a substantially cubic shape formed by folding and stacking sanitary tissue paper 2 such as paper towels with a flexible packaging film 4, and has a top surface 4C. The port forming part 5 is taken out. This package 1 is formed into a substantially hexahedron shape substantially similar to the shape of the bundle 3, and the substantially hexahedron shape has a top surface 4C, a bottom surface 4D facing the top surface 4C, and a top surface between the top surface 4C and the bottom surface 4D. The long side 4B and the short side 4A between the bottom 4D.

1 to 4 show an embodiment of a gusseted package. This gusseted package is a pillow-type package with concave folds. The packaging film 4 is used to wrap the packaged body, that is, the bundle 3, in a cylindrical shape and form openings at both ends in the longitudinal direction. The portion 4X that overlaps in the winding direction is bonded at the bottom surface position and the like by melting or an adhesive, and the edge of the portion protruding beyond the short side surface 3A of the bundle 3 is formed while forming a concave fold. The short side 4A is used as a sealing surface by melting or bonding from the upper and lower directions. In this gusseted package, the short side 4A is also the sealing surface, which faces the short side 3A of the bundle 3; the surface with the concave fold originally is the long side 4B, and the folded surface with the bundle 3 is the long side 3B face to face. However, in the present invention, the packaging form of the package 1 is not limited. It can also be a simple pillow packaging without concave folds, or other appropriate packaging such as overlap packaging, also known as caramel packaging, as shown in Figure 7. The package is constructed by overlapping and fusing the flaps into the short sides 4A.

The bundle 3 of the sanitary tissue paper 2 contained in the package 1 of the present invention is a so-called pull-out type bundle. In particular, as shown in FIG. 2, this bundle 3 is folded in half with a square sanitary tissue paper 2, and the folded sheet 2B of the other sanitary tissue paper 2 is positioned above and below the folded inner side 2A of the sanitary tissue paper. A plurality of sheets of sanitary tissue paper 2 are folded and stacked; and have a pair of long sides 3B that are aligned with the folded edge 2C of each sanitary tissue paper 2, and a pair that is not aligned with the folded edge 2C of each sanitary tissue paper 2. The short side surfaces 3A further have a pair of flat surfaces (top and bottom surfaces) 3C connected to the short side surfaces 3A and the long side surfaces 3B to form a substantially cubic shape.

The number of sets of the sanitary tissue paper 2 constituting the bundle 3 is not limited, and it is possible to set 30 to 240 sets of one or more layers as one set. The size of the bundle 3 is also not limited, but it is desirable that the bundled 200 sets of sanitary tissue paper have a height of 30 to 100 mm x a lengthwise direction (width) of 150 to 250 mm x a short side direction (depth) of 100 to 130 mm. Also, when the height of the bundle is shorter than the dimension in the depth direction of the top surface of the bundle, the effect of improving the extraction failure of the present invention is further enhanced.

The filling rate of the bundle 3 in the package 1 is not limited as long as the effect of the present invention is not hindered, but the gap between the bundle and the packaging film is preferably within a range of 0 to 30 mm. The bundle 3 may be packaged with a packaging film in a slightly compressed state in the vertical direction.

Each sanitary tissue paper 2 constituting the bundle 3 has a single-layer structure of one sheet or a laminated structure in which a plurality of sheets are stacked. The number of layers is not limited, and it can be said that one sheet (1 layer) or the number of layers stacked with two sheets (2 layers) is desired. The mass per unit area per layer is not limited, but is preferably 13 to 40 g/m ² . The mass per group is desired to be 1.0 to 2.5 g. Sanitary tissue paper with one or two layers of the above-mentioned sheet mass per unit area is especially suitable for hand wipes after washing hands. Furthermore, the paper thickness per group of the sanitary tissue paper is desirably 100 to 500 μm. With the number of layers, mass per unit area, and paper thickness of sanitary thin paper, the structure of the present invention, especially the outlet forming portion with the characteristics of the narrowed portion, the widened portion, and the curved convex portion, can prevent poor extraction and erection. The improvement effect is high. The failure of extraction means that the next piece of toilet tissue cannot be pulled up and falls when it is extracted. The failure of erection means that it does not stand up on the top surface of the package and falls down.

In addition, mass per unit area is measured based on the measuring method of Japanese Industrial Standard JIS P 8124 (1998). The measurement of the mass per unit area per layer can be calculated by mass per unit area=sheet weight per group/(sheet area×number of layers). In addition, the thickness of the paper was fully conditioned under the conditions of the Japanese Industrial Standard JIS P 8111 (1998), and the dial thickness gauge (dial thickness gauge, thickness measuring device) "PEACOCK G type" was used under the same conditions. Ozaki Seisakusho Co., Ltd.) and an equivalent model to measure the state of multiple layers.

Also, the sanitary tissue paper 2 of the present invention is a dry type tissue paper after drying, not a so-called wet type tissue paper impregnated with a chemical solution. Therefore, a large amount of air is contained in the bundle 3 formed of the sanitary tissue paper 2 . Even in this dry type sanitary tissue paper 2, there is also a chemical solution added type tissue paper, which is added with a chemical solution such as a polyhydric alcohol such as glycerin to increase moisture by absorbing moisture, and this hygienic tissue can also be used. tissue.

The raw material pulp constituting the sanitary tissue paper 2 is not limited. For example, pulp derived from coniferous trees such as NBKP (needle-leaved tree bleached kraft pulp, long-fiber pulp) and pulp derived from broad-leaved trees such as LBKP (broad-leaved tree bleached hardwood kraft pulp) The raw material pulp. Moreover, waste paper pulp (waste paper pulp) may be blended, and waste paper pulp may be comprised only. In the present invention, particularly excellent effects are exhibited on tough and highly rigid sanitary thin paper such as paper towels, so it is particularly preferable to use more than 50% of conifer-derived pulp.

The dry tensile strength of the sanitary thin paper 2 is not limited, but it is particularly suitable for the present invention if it is 1000 to 3000 cN/25 mm in the longitudinal direction and 250 to 1500 cN/25 mm in the lateral direction. The method for measuring dry tensile strength is carried out in accordance with the method of Japanese Industrial Standard JIS P 8113 (1998). As a measuring device, "Universal Tensile Compression Tester TG-200N" manufactured by Minebea Co., Ltd. and its equivalents are exemplified.

The opening forming portion 5 is formed by arranging the easy-to-break line 50 annularly on the top surface 4C of the packaging film 4 facing the sanitary tissue 2 at the uppermost position of the bundle 3 of the packaging film 4 . In addition, the ring shape in this specification is not limited to a circle or an ellipse, but means a shape formed as a closed area. This extraction opening forming portion 5 is formed on the top surface 4C of the packaging body 1 by breaking and separating the easy-to-tear line 50 and removing the range surrounded by the easy-to-tear line 50 for pulling out the sanitary tissue paper 2. The opening portion is exactly to take out outlet 6. In the package 1 of the present invention, the bundle 3 is of a pull-out type, so if the uppermost piece of sanitary tissue paper 2 of the bundle 3 is pulled out from the formed outlet, the next sanitary tissue paper 2 positioned directly below it will be pulled out. Part of the thin paper will be exposed from the removal opening. In addition, since the take-out opening forming part 5 is formed by disposing the easy-to-tear line 50 in a ring shape, the take-out opening 6 formed by separating and removing the area surrounded by the easy-tear line 50 is not just a straight line slit shape. , but has a certain width in the depth direction. This extraction opening forming portion 5 can be separated and removed by peeling off the range surrounded by the easy-to-tear line 50 by continuously pulling from one end portion 5A toward the other end portion 5B. It is a film within the range, so it is excellent in handling when opening. In addition, in this specification, for convenience of description, the end on the left side in the drawing is designated as one end 5A, and the end on the right is designated as the other end 5B for description, but these ends may be interchanged. department.

The package body 1 of the form shown in FIGS. 1 to 5 has a particularly preferable shape, that is, a substantially gourd-shaped outlet forming portion 5 . This outlet forming portion 5 has: a widened portion 51 extending in the width direction at the central portion in the depth direction of the top surface 4C; and the curved convex portion 53, which is continuous with the widened portion 52 and bulges outward toward the width direction of the bundle 3 into a convex shape.

In particular, the widening portion 52 is desirably disposed so that the angle of the easy-to-break line 50 with respect to the width direction gradually increases as it goes outward in the width direction of the bundle 3 . The easy-to-crack line 50 serving as the edge of the widened portion 52 preferably has a taper angle ∠α of 25 to 60 degrees with respect to the width direction.

In addition, it is desirable that the easy-to-break line 50 is formed in a smooth curve from the widening portion 52 to the curved convex portion 53 . If the easy-to-split thread 50 is arranged, the easy-to-split thread 50 can be easily split from the widened portion 52 to the curved convex portion 53 .

In the embodiment shown in FIGS. 1 to 5 , the take-out opening 6 formed by the take-out opening forming portion 5 is from the above-mentioned narrowing portion 51 to the widening portion 52, and the vicinity of the edge becomes a substantially trapezoidal free space that is easy to move up and down. Edge sheet 51A, so especially as shown in Figure 4, when pulling out a set of sanitary tissue paper 2 from bunch 3, this edge sheet 51A is deformed in the mode that the former pull-out direction is slightly wound, and for the sanitary tissue paper 2 that next group exposes Be leaned on and supported. Also, according to the take-out opening 6 formed by the take-out opening forming portion 5, the roots 2R of the next set of sanitary tissue papers that are partly exposed from the take-out opening 6 will be curved along the The edge 6E of the convex portion 53 is deformed so as to be wound, and is easily deformed into a columnar shape with high erectability. Further, when the outlet 6 is formed, it is easy to form a recessed portion 6H between the widened portion 52 and the curved convex portion 53 of the outlet forming portion 5, so a part of the root portion 2R of the next set of sanitary tissue paper is exposed from the outlet 6, Standability is improved by fitting in the recessed portion 6H. In particular, in this extraction opening forming portion 5, the above-mentioned function makes it difficult to cause extraction failure, which is caused by the high rigidity of the sanitary tissue paper, which is easy to cause the sanitary tissue paper to fall into the packaging film. In addition, this function and effect are particularly effective in combination of the above-mentioned mass per unit area and thickness of the sanitary thin paper with an appropriate packaging film described later. However, as for the take-out opening forming part 5 of this invention, as shown in FIG. 7, the shape which does not have the widened part 52 may be sufficient. In addition, the extraction port forming portion 5 may have a linear easy-to-break line continuous with the ring-shaped easy-to-break line within the range that does not hinder the operation and effect of the present invention.

Also, as shown in FIGS. 1 to 5 , in the shape of the outlet forming portion 5 having the narrowed portion 51, the widening portion 52 and the curved convex portion 53, it is particularly desirable that the entire width direction of the outlet forming portion 5 The dimension L1 of the bundle 3 is more than 70% of the dimension L2 in the width direction of the top surface of the bundle 3, and the maximum dimension L3 in the depth direction of the entire take-out opening forming part 5 is 10 to 40% of the dimension L4 in the depth direction of the top surface of the bundle 3 The dimension L5 in the width direction of the narrowing portion is 50% to 70% of the dimension L2 in the width direction of the top surface of the bundle 3, and the dimension L6 in the depth direction of the narrowing portion is the dimension in the depth direction of the top surface of the bundle 3 0.5% to 10% of L4. In this shape of the outlet forming portion 5 , a curved convex portion 53 that is particularly wide in the depth direction is formed. Also, the free edge piece 51A formed near the edge of the narrowed portion 51 becomes wider, and when pulled out, the space between the narrowed portions 51 can be opened wider. Therefore, when the sanitary tissue paper 2 is pulled out from the bundle 3, it can be taken out smoothly. In particular, even in gusset packs and pillow packs, when the sanitary tissue paper 2 wrapped inside is pulled out and the top surface position of the package body 1 is easily deformed, the sanitary tissue paper can be easily placed. 2. The top surface when pulled out is maintained as a flat surface without distortion, and when the sanitary tissue paper is to be taken out one at a time, it can be taken out particularly easily and stably; The boundary with the top surface 4C forms a clear fold line, and the packaging form in which the packaging film is easily deformed at the top surface of the package 1; the rigid sanitary tissue 2 is a paper towel or the like with the above-mentioned mass per unit area and paper thickness. Also, the free substantially trapezoidal edge sheet 51A formed near the edge of the narrowed portion 51 becomes wider and has a deep recess 6H, so that the edge sheet can be strong even for a sanitary tissue paper 2 with high rigidity. Toughness provides support and supports the root 2R of the sanitary tissue paper 2, so it can effectively prevent it from falling. In addition, the dimension of the edge of the curved convex portion 53 becomes longer, so the sanitary tissue paper 2 is gently wound along the edge of the curved convex portion 53 of the sanitary tissue paper 2, and creases are not easily formed on the highly rigid sanitary tissue paper 2. , so the standability is further improved.

In addition, it is desirable that the dimension L3 in the depth direction of the curved convex portion 53 is specifically 25 to 45 mm, and the bulging dimension L7 in the width direction thereof is preferably 2.5 to 12.5 mm.

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 Monolayer film of ester film, nylon film, polyvinylidene chloride film, ethylene vinyl alcohol copolymer, or laminated film including these films and laminated appropriately, and surface treatment such as aluminum vapor deposition on these films The gas barrier film (gas barrier film). In addition, biomass films derived from plant materials such as sugarcane, sweet potato (starch), and corn can also be used. From the viewpoint of environmental protection, it is desirable to use such a biofilm.

Polypropylene film, polyethylene film is especially suitable. In addition, the packaging film 4 may be a satin film excellent in design and texture. The melting point of the film may be 150°C or lower. In addition, a packaging film with a low melting point can be thermally welded at a low temperature, but the actual lower limit is 80°C. Examples of polypropylene films include unstretched polypropylene films (CPP); examples of polyethylene films include linear low-density polyethylene films (LLDPE), low-density polyethylene films (LDPE), and medium-density polyethylene films (MDPE). .

Furthermore, when packaging odorous thin papers such as scented tissue paper, ethylene vinyl alcohol copolymer resin films and polyethylene terephthalate resin films excellent in fragrance retention are desired. It may also be a multilayer resin film in which a polyethylene resin film or a polypropylene resin film is laminated on one or both sides of a polyethylene terephthalate resin film to improve heat-sealability.

Here, as shown in FIGS. 5 and 6 in particular, the feature of the outlet forming portion 5 of the present invention is that it becomes at least one end portion of the width direction of the outlet forming portion 5 (the other end in the illustrated example). The portion 50P of the easy-to-break line 50 at the edge of the end portion 5B) is configured as a perforation in which the deformed cut portion 50D and the non-cut portion 50U are alternately arranged. The deformed cut portion 50D has an end cut portion 50e in the One end or both ends have a portion cut into a ㄑ shape. In the shape of the take-out opening forming portion 5 shown in FIGS. 1 to 6 , especially in the range of more than 80% of the portion constituting the edge of the curved convex portion 53, the aforementioned deformed cutting portions 50D and non-cutting portions are alternately arranged. Portion 50P of portion 50U. In addition, in the curved convex portion 53, preferably 90% or more, particularly preferably 95% or more, may be the portion 50P where the deformed cutting portion 50D and the non-cutting portion 50U are alternately arranged. It is also possible to configure the entire area to be the easy-to-crack line in which the deformed cutting portion 50D and the non-cutting portion 50U are alternately arranged. In addition, FIGS. 5 and 6 illustrate the portion constituting the edge of the curved convex portion 53, which is configured in a form in which the deformed cut portion 50D and the portion 50P of the non-cut portion 50U are alternately arranged, but the present invention is not limited thereto. Alternatively, the edge portion constituting the end portion of the substantially elliptical outlet forming portion 5 shown in FIG. 7 may simply be configured as a portion in which the deformed cutting portion 50D and the non-cutting portion 50U are alternately arranged.

More specifically, as shown especially in FIGS. 5 and 6 , the deformed cutting portion 50D is continuously arranged on one end or both ends of the main cutting portion 50m on a straight or substantially linear gentle bending line with The end cut portion 50e having a predetermined angle has a portion cut into a ㄑ shape at the one end or both ends. As shown in Figure 5, this deformed cut portion 50D may also be ^a deformed cut portion 50D ¹ or a deformed cut portion 50D ² . ^Both ends of the broken part 50D2 are formed in a ㄑ shape. As shown in Figure 6 (c), this deformation cutting portion 50D may also be a deformation cutting portion 50D ³ , the end of one end cutting portion 50e faces outward in the width direction of the top surface of the bundle 3, and The end of the one end cut portion 50 e is directed toward the center side in the width direction of the top surface of the bundle 3 .

Further, as an arrangement form of the deformation cutting portions 50D in the portion where the deformation cutting portions 50D and the non-cutting portions 50U are arranged alternately, the end of the end cutting portion 50e may also be as shown in Fig. 5 and Fig. 6 (a) The illustrated form is generally arranged only toward the widthwise outward side of the top surface of the bundle 3 , or may be arranged only toward the widthwise center side of the top surface of the bundle 3 as shown in FIG. 6( b ). Furthermore, the ends of the end cut portion 50e may be mixed with an end facing outward in the width direction of the top surface of the bundle 3 and an end facing the width direction center side of the top surface of the bundle 3 . Further, as shown in FIG. 6( c), only the ends of the end cutting portions 50e located at both ends in the depth direction of the top surface of the bundle 3 face outward in the width direction of the top surface, while the other The end of the end cut portion faces the width direction center side of the top surface.

Under the general unsealing operation, the unsealing operation is continuously pulled from one end portion 5A of the range surrounded by the easy-to-break line 50 toward the other end portion 5B. Regarding the extraction opening forming portion 5 of the present invention, the opening is finally torn. The part that is most likely to be torn apart is the part 50P in which the deformed cutting part 50D and the non-cutting part 50U are alternately arranged at the end part in the width direction (the other end part 5B in the illustrated example). In the portion 50P in which the deformed cutting portion 50D and the non-cutting portion 50U are alternately arranged, it is generally pulled continuously from one end portion 5A toward the other end portion 5B of the range surrounded by the easy-to-break line 50 . When the unsealing operation is performed, the adjacent end cut portions 50e of the adjacent deformed cut portions 50D face together toward the widthwise outward side of the top surface of the bundle 3, or face together in the width direction of the top surface of the bundle 3 In the case of the central side, since the extending directions of the adjacent end cut portions 50e are similar to the crossing direction, the non-cut portion 50U between these deformed cut portions 50D is easily cut. Also, in the case where one of the adjacent end cut portions 50e of the adjacent deformed cut portions 50D faces outward in the width direction of the top surface 3 and the other faces toward the center side in the width direction of the top face, if the In a general unsealing operation in which one end portion 5A of the range surrounded by the easy-to-break line 50 is continuously pulled toward the other end portion 5B, the non-cut portion 50U between the deformed cut portions 50D is immediately cut off. Twisting occurs, so the film will not be easily cut due to cracking or elongation. One of the adjacent ends of the adjacent deformed cutting portion 50D has the end cut portion 50e, and the other side does not have the end cut portion 50e. In the general unsealing operation in which one end 5A of the range is continuously pulled toward the other end 5B, the non-cut portion 50U between these deformed cut portions 50D will be twisted just before cutting, so there will be no Cracking or elongation of the film makes it easy to be cut. In this way, the portion 50P in which the deformed cut portion 50D and the non-cut portion 50U are alternately arranged is formed at the end portion in the width direction (the other end portion 5B in the illustrated example), whereby a crack occurs when the seal is opened. less likely. Especially in the substantially gourd-shaped shape with narrowing portion 51, widening portion 52 and curved convex portion 53 as shown in FIGS. The range of the easy-to-tear line at the edge of the portion 53 is long and arranged along the depth direction, so the angle of intersection between the pulling direction during unsealing and the split direction of the easy-to-tear line is large, and it becomes easy to break the package when the unsealing operation is performed. The film 4 takes the shape of the slit. However, by providing the portion 50P in which the deformed cut portion 50D and the non-cut portion 50U are arranged alternately, the possibility of a crack occurring at the end thereof becomes very small. The longitudinal direction (MD direction) of the packaging film 4, such as pillow packaging and gusset packaging, becomes a direction parallel to the longitudinal direction of the outlet forming portion 5 and is prone to tearing, which is particularly effective.

Also, regarding the take-out opening forming portion 5 of the present invention, in the portion 50P where the deformed cutting portion 50D and the non-cutting portion 50U are alternately arranged, the end cutting portion 50e at the end position of the deformed cutting portion 50D becomes an independent The extending direction of the cutting portion 50m is slightly deviated toward the widthwise inner side or the widthwise outer side, so if the extraction opening 6 is formed, the portion that was the non-cutting portion 50U has a slightly protruding zigzag edge. Therefore, when a group of sanitary tissue paper 2 is pulled out from the bundle 3, the serrated edge clamps the sanitary tissue paper 2 for the root 2R of the next group of sanitary tissue paper 2 which is continuous with the taken-out sanitary tissue paper and partly exposed from the extraction port. edge in the width direction and improve drop resistance.

Here, the preferred form of the take-out opening forming portion of the present invention is particularly configured as shown in FIG. The deformed cut portion 50D is a cut portion 50D ² having an end cut portion 50 e facing outward in the width direction at both ends, and is located closer to the deformed cut portion 50D ² . The deformed cut portion 50D ¹ on the outer side of the depth is a deformed cut portion 50D ¹ , which has a shape oriented in the width direction only at the end portion of the widened portion 51 located more outward in depth than the center C in the depth direction. The outer end cutting part. In the general unsealing operation of pulling continuously from one end portion 5A of the range surrounded by the easy-to-break line 50 toward the other end portion 5B for the extraction opening forming portion 5 shown in FIG. 5 , compared with At the end of the deformed cut portion 50D ¹ that does not have an end cut portion, there are adjacent end cut portions of the deformed cut portion 50D ¹ and the cut portion 50D ² at a position further outside in the width direction in the pulling direction. 50e, so when the non-cutting portion 50U is to be split during the unsealing operation, even if a tiny crack of the packaging film occurs, the split immediately after the split is easy to continue at the split end. Cutting portion 50e, and it is difficult to produce larger cracks.

The ratio of the size of the deformed cut portion 50D to the non-cut portion 50U at the end of the outlet forming portion 5 is not necessarily limited, and may be set to the following range. The dimension L8 of the deformed cut portion 50D is 5 mm. More than 20 mm, preferably more than 7 mm and less than 13 mm. Also, the dimension L9 of the end cut portion 50e serving as the deformed cut portion 50D is not less than 0.2 mm and not more than 3.0 mm, preferably not less than 0.5 mm and not more than 2.5 mm. Furthermore, the dimension L11 of the non-cut portion 50U between the deformed cut portions 50D is 0.2 mm to 3.0 mm, preferably 0.3 mm to 2.0 mm. Within this range, it is extremely difficult to generate a crack between the deformed cut portions 50D, and the non-cut portion 50U is cut, and the crack progresses continuously and smoothly.

Also, the angle ∠β between the main cutting portion 50m and the end cutting portion 50e in the ㄑ-shaped portion of the deformed cutting portion 50D should be 90∘ or more, preferably 100∘, more preferably 120° ∘. Also, it is desirable to chamfer the main cut portion 50m toward the end cut portion 50e. At this time, the curvature of the ㄑ shape is not limited, and it can be R0.1~R2.0, preferably R0.2~R1.2, especially Preferably it is R0.4 to R1.1. With this curvature, the cracking of the deformed cut portion proceeds continuously and smoothly from the main cut portion 50m to the end cut portion 50e.

In addition, in the easy-to-break line 50 constituting the edge of the outlet forming portion, the portion 50P in which the deformed cut portion 50D and the non-cut portion 50U are alternately arranged may be provided at both ends of the outlet forming portion 5 , may be provided only at one end of the outlet forming portion 5 . If it is only formed at one end, then, for example, as shown in FIG. In the range L10 up to the position of the outer end 53t of the curved convex portion 53 . In this way, as shown in FIG. 8( b ), a free piece 5T is formed at one end portion 5A of the take-out opening forming portion 5, and the free piece 5T includes a range from one deep side to an outer side end, so that it can be easily The free sheet 5T is pinched and wound up, so that the unsealing operation can be performed more easily.

Here, the thickness L9 of the packaging film 4 may be appropriately selected, and is preferably 25 to 75 μm as measured in accordance with Japanese Industrial Standard JIS P 8118 (1998). When the thickness is 25 to 75 μm, the effects of the present invention can be effectively exhibited. Thickness L9 is to use the dial-type thickness gauge (thickness measuring device) "PEACOCK G-1A type" (manufactured by Ozaki Seisakusho) and Its equivalent model is used for measurement.

In addition, the packaging body 1, preferably the wrapping film 4 is less flexible than the sanitary tissue paper 2. If the softness of the packaging film 4 is smaller than the softness of the sanitary tissue paper 2, when the sanitary tissue paper 2 is pulled out, the jagged edge formed by the part where the convex cutting part and the non-cutting part are juxtaposed is particularly complex. Each tab is easy to be deformed in the pulling direction, and the pulling resistance is small so that it can be pulled out smoothly, and the paper dust generated due to friction is also reduced.

In the easy-to-break line 50 constituting the take-out opening forming portion 5 of 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 formed as a slit cut or the like. , the slits are provided with holes, uncut portions (non-cut portions). However, it is not limited to this.

When the portion other than the portion in which the deformed cutting portion 50D and the non-cutting portion 50U are alternately arranged is used as an eyelet, the type is not limited. For example, the cutting part 50C is a straight line, that is, a normal eyelet; the cutting part is a hole, that is, a micro perforation; Ordinary perforations are preferred. The slit is a portion cut into a slit on the film, and since it has a non-cut portion, the non-cut portion and the cut portion are alternately arranged. In addition, a slit with a non-cut portion is sometimes simply called a slit, and there is no difference from a slit with a hole and a non-cut portion. When the cut portion is less than 2 pitches (pitch), that is, when the cut portion of the same size does not continue twice, it is called a slit. In general, the slits make the cutouts longer in size than the perforations.

In the portion other than the portion where the deformed cutting portion 50D and the non-cutting portion 50U are alternately arranged, the ratio of cutting and connecting in the slit with holes or non-cutting portions can be determined according to the ease of breaking of the film used. It can also be defined as an appropriate interval, and the size of the cut part can also be 0.8mm or more and 20.0mm or less; the size of the non-cut part (connecting part or uncut part) can be 0.3mm or more and 5.0mm or less Appropriately designed within the range.

In addition, with regard to the non-cut portion 50U in the easy-to-break thread 50 of the present invention, part or all of it can be used as a half-cut portion that is not completely cut in the thickness direction of the packaging film 4 but Cutting into a range up to a predetermined depth in the thickness direction, this complete cutting is from the side that does not face the bundle 3, that is, the front side, to the side that faces the bundle 3, that is, the back side. By making the non-cut portion 50U a half-cut portion with a notch, the force required to split the packaging film 4 is reduced, and the split at the easy-to-tear line 50 can be continuously and smoothly progressed. The end portion of the extraction opening forming portion 5, especially the non-cut portion 50U between the deformed cut portions 50D located at the position of the curved convex portion may be a half cut portion. The cutting depth of the half-cut portion is not limited, but is preferably not less than 20% and not more than 80% of the thickness of the packaging film.

In the shapes having the narrowed portion 51, the widened portion 52 and the curved convex portion 53 shown in FIGS. Since the pulling direction of the end portion 5B during the unsealing operation is the same, it is desirable to have no perforation for making the non-cut portion a half-cut portion. This is because it is desirable that the edge of the widened portion 51 is unlikely to be accidentally cracked.

In addition, the easy-to-break line 50 is a slit having a perforation and a non-cut portion, and may include a portion in which the cut portion 50C and the half-cut portion are alternately arranged, and is formed by, for example, one die-cutting.

[Example] Next, Examples 1 to 4 and Comparative Examples 1 to 2 of the present invention were produced, and tests were carried out regarding the dropping of the sanitary tissue paper and the presence or absence of cracks in the opening opening. The shape of the outlet forming portion of the packages of Examples 1 to 4 and Comparative Example 1 is a substantially gourd shape having a widened portion, a widened portion, and a curved convex portion as shown in FIGS. 1 to 5 . The take-out opening forming portion of the package of Comparative Example 2 was simply formed as a linear perforation.

The bundles contained in the packages of each example are removable one-layer paper towels (the product name is rakuracook kitchen paper towels, the mass per unit area is 20g/ ^m2 and the paper thickness is 220μm) and stacked into 100 sets. of bundles. In addition, the packaging form of each example is a gusseted packaging, and the extending direction of the packaging film is a direction perpendicular to the width direction of the outlet forming portion.

The test of "number of drops" is to split the easy-to-tear line of the outlet forming part to form an outlet, and pull out the paper towels constituting the bundle from the outlet until the last one, and calculate The actual number of drops generated.

In the "opening performance" test, the subject performed the unsealing operation by pinching one end of each sample and pulling it toward the other end, and evaluated whether the other end of the outlet was damaged or not. gap. Assuming N=10, it was evaluated as "present" if there was a case where a crack occurred, and "no" was evaluated if there was no case where a crack occurred.

Table 1 below shows the ratio of the size of the outlet forming portion to the size in the depth direction and the size in the width direction of the bundle top surface in each example, and the test results.

[Table 1]

According to Table 1, Examples 1 to 4, the part constituting the edge of the (end) curved convex part is set as the part where the cut part and the half cut part are alternately arranged, even if the maximum dimension in the depth direction of the outlet is taken out, that is, The dimension in the depth direction of the end portion, that is, the curved convex portion, is 35 mm long and occupies a range of 30% of the dimension in the depth direction of the top surface of the bundle, so that cracks are likely to occur, and it is not confirmed that there is a hole in the take-out port during the unsealing operation. crack at the end.

Unlike the curved convex portion in Example 1, where the cut portions are half-cut portions, in Comparative Example 1, non-cut portions are generally used as before. On the other hand, in Comparative Example 1, when the unsealing operation was performed, a tear was generated at the end of the extraction port. As in the embodiment, even if the easy-to-break line formed by the edge of the curved convex part of a very large size is shown, by setting this part as a part where the cut part and the half cut part are alternately arranged, when the unsealing operation When, can prevent the end that takes out the opening from cracking.

Therefore, even for example, as shown in FIG. 7 with other narrowed outlet shapes that do not have a widened portion, by making the easy-to-break line of the edge constituting the end portion a cut portion and a half-cut portion alternately arranged Partially, during the unsealing operation, it is also possible to further prevent cracks from being generated at the end of the take-out port.

Also, regarding the drop, in Comparative Example 2, the outlet forming part was a slit for the outlet using one hole, and 12 drops were confirmed. In contrast, in Examples 1 to 4 and Comparative Example 1, the number of drops was 0 and no drop was confirmed. That is, the outlet formed by the shape of the outlet forming portion having the narrowed portion, the widened portion, and the curved convex portion exhibits particularly excellent drop prevention properties.

As can be seen from the above, the packaging body of the present invention is a packaging body of a packaging film, and when unsealed, it is difficult to produce cracks at the edge of the width direction of the outlet and has excellent unsealability. A rigid sanitary tissue with excellent pull-out properties.

1: Package 2: Sanitary tissue paper 2A: Folded inner side 2B: Folded sheet 2C: Folded edge 2R: Root of sanitary tissue paper exposed from the outlet 3: Bundle (bundle) of sanitary tissue paper 3A: Short side side 3B: long side 3C: top and bottom of the bundle 4: wrapping film 4A: short side 4B: long side 4C: top 4D: bottom 4X: overlapping part of wrapping film 5: take-out opening forming part 5A, 5B: long Side direction end 5T: free sheet 6: take-out opening 6E: edge of take-out opening 6H: recessed part of take-out opening 41: front side of packaging film 42: back side of packaging film 50: easy-tear line 50D, 50D ¹ , 50D ² , 50D ³ : Deformed cutting part 50m: Main cutting part 50e: End cutting part R: Curvature of ㄑ-shaped part ∠β: Opening angle of ㄑ-shaped part 50C: Cutting part 50U: Non-cutting part ( Uncut part, connecting part) 50P: the part where the deformed cut part and the non-cut part are alternately arranged The taper angle L1 of the wide part: the dimension of the width direction (long side direction) of the extraction opening forming part L2: the dimension of the width direction (long side direction) of the top surface of the bundle L3: the depth direction (short side direction) of the extraction opening forming part ) (the dimension in the depth direction of the curved convex portion) L4: the dimension in the depth direction (short side direction) of the top surface of the bundle L5: the width direction (long side direction) dimension of the narrowed portion L6: the narrowed portion Dimension L7 in the depth direction (short side direction): Bulging dimension L8 in the width direction of the curved convex portion L8: Dimension L9 of the deformed cut portion: Dimension L10 of the end cut portion: Widening portion from one side in the depth direction The range L11 of the position beyond the outer end of the curved convex part in the middle: the size of the non-cut part between the deformed cut parts 105: the take-out opening forming part 105A: one end part of the taking-out opening forming part 105B: the taking-out opening forming part The other end 105P of the film: slit 150 of the film: hole 150e: hole at the end in the width direction X: longitudinal direction (width direction) Y: direction perpendicular to the longitudinal direction (depth direction) Z: thickness direction C of the packaging film : Center of the depth direction of the narrowed part

FIG. 1 is a perspective view for explaining a package of the present invention. Fig. 2 is a perspective view illustrating a bundle of sanitary tissue paper. Fig. 3 is a top view for explaining a take-out opening forming portion. Fig. 4 is a perspective view for explaining the usage state of the package according to the present invention. Fig. 5 is a partially enlarged view (example) for explaining a take-out opening forming portion. Fig. 6 is a figure for explaining the other example of taking out opening forming part, and Fig. 6 (a) is that the end of end cutting part is all towards the outside, and Fig. 6 (b) is that the end of end cutting part is all facing inward, Fig. 6 (c) is that the ends of the end cut part are directed outward or inward mixedly. FIG. 7 is a diagram for explaining an example of another shape of a take-out opening forming portion. FIG. 8 is a diagram for explaining another example of an extraction opening forming portion. FIG. 9 is a diagram for explaining a conventional extraction opening forming portion.

Domestic deposit information (please note in order of depositor, date, and number) none

Overseas storage information (please note in order of storage country, organization, date, and number) none

1: Package body

4: Packaging film

4A: Short side

4B: Long side

4C: top surface

4D: Bottom

4X: overlapping portion of packaging film

5: Take out the mouth forming part

50: easy to split line

X: Long side direction (width direction)

Y: The direction perpendicular to the long side direction (depth direction)

Claims (10)

A package in which a bundle of sanitary tissue paper is packaged with a flexible resin packaging film, characterized in that it has a take-out opening forming portion, and the easy-to-split thread is arranged in the package in a ring shape. formed by the top surface; And, the easy-to-crack line constituting the edge of at least one end portion in the width direction of the aforementioned take-out opening forming portion is a perforation in which deformed cut portions and non-cut portions are alternately arranged, and the deformed cut portion has an end cut. The broken part has a part cut into a ㄑ shape at one end or both ends. The package according to claim 1, wherein the size of the cut portion at the end of the deformed cut portion is 0.5 to 2.5 mm, and the size of the non-cut portion between the deformed cut portions is 0.2 to 1.0 mm. mm. The package according to claim 1 or 2, wherein the outlet forming portion is formed in a shape having a widened portion, a widened portion, and a curved convex portion, and the widened portion extends along the width at the central portion in the depth direction. direction, the widened portion is continuous at the end of the narrowed portion and gradually widens as it goes outward in the width direction as it moves away from the widened portion, and the curved convex portion is continuous with the widened portion and extends toward the width direction. Swell outward into a convex shape; In addition, the portion of the edge of the curved protrusion constituting at least one of the easy-to-split lines has holes in which the deformed cut portions and the non-cut portions are alternately arranged, and one end of the deformed cut portion or Both ends form a ㄑ shape. The package according to claim 3, wherein more than 80% of the portion constituting the edge of the curved convex portion is formed by holes in which the deformed cut portion and the non-cut portion are alternately arranged. The package according to claim 3 or 4, wherein the deformed cut portion has the end cut portion at an end located further outside in depth than the center of the widened portion in the depth direction. The package according to claim 3 or 4, wherein the end of the cut-off portion faces the center side in the width direction of the top surface. The package according to claim 3 or 4, wherein the end of the cut-off portion faces outward in the width direction of the top surface. The package according to claim 3 or 4, wherein the holes in which the deformed cut portion and the non-cut portion are arranged alternately are only at the ends of the cut portion located at both ends in the depth direction of the top surface. , facing outward in the width direction of the top surface, and the ends of the other cut-off portions face the center side in the width direction of the top surface. The package according to claim 3, wherein the dimension of the curved convex portion in the depth direction is 25 to 45 mm, and the bulging dimension in the width direction is 2.5 to 12.5 mm. The package according to any one of Claims 3 to 9, wherein the size of the outlet forming part in the width direction is 70% or more of the size in the width direction of the top surface of the bundle, and the maximum size in the depth direction is It is 10% to 40% of the dimension of the depth direction of the top surface of the aforementioned bundle; and, the dimension of the width direction of the aforementioned narrowed portion is 50% to 70% of the dimension of the width direction of the top surface of the aforementioned bundle, and the depth The dimension in the direction is 0.5% to 10% of the dimension in the depth direction of the top surface of the bundle.

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