TW202237502A - Wrapped body - Google Patents

Abstract

The present invention addresses the problem of providing a wrapped body comprising a film wrap having excellent opening properties. This problem is resolved by means of a wrapped body in which a bundle of sanitary tissue paper is wrapped by means of a flexible resin wrapping film, wherein: the wrapped body has a removal opening forming portion formed by arranging an easy-tear line in a ring shape on an upper surface; and an edge of at least one end portion, in a width direction, of the removal opening forming portion is configured by means of the easy-tear line, in which cut portions and half-cut portions are arranged alternately.

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 annular eyelet is pulled as it approaches the eyelet 150e at the other end that is finally peeled off 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 150e 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, packages in the form of pillow packaging and gusset packaging generally set the extending direction of the packaging film in a direction perpendicular to the long side direction of the outlet forming part, so it is easy to Create this rift.

[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 bundles of sanitary tissue paper with a flexible resin packaging film, and is characterized in that it has a take-out opening forming part that is formed by the easy-to-tear line. formed by being ring-shaped arranged on the top surface of the packaging body; In addition, the edge of at least one end portion in the width direction of the take-out opening forming portion is constituted by the easy-tear line in which cut portions and half-cut portions are alternately arranged.

A second means relates to the package of the above-mentioned first means, wherein the half-cut portion is cut to a depth of 20% or more of the thickness of the packaging film.

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 in the width direction, the widened portion is continuous at the end of the widened portion and gradually becomes wider as it goes outward in the width direction, the farther away from the widened portion, the curved convex portion is continuous with the widened portion and faces The outer side of the width direction bulges into a convex shape; In addition, the edge portion of at least one of the curved protrusions constituting the easy-to-split line has a portion in which cut portions and half-cut portions are alternately arranged.

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 a portion in which cut portions and half-cut portions are alternately arranged.

A fifth means is the package according to the above third 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 sixth means is the package according to the above-mentioned third means, wherein the part of the easy-to-tear line constituting the edge of the widened part continuous to the curved convex part has a part in which cut parts and half cut parts are arranged alternately, the The curved protrusion has portions in which cut portions and half cut portions are alternately arranged.

The seventh means relates to the package according to the third means to the sixth 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 maximum 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. In addition, with regard to the package 1 of the present invention, it is not considered to take out the so-called pocket tissue paper. The toilet tissue wrapped in the pocket tissue paper is facial tissue, and the number of sets is 10 to 12. The degree of the set, the height are around 10mm.

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 the sanitary thin paper, the composition 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 extraction failure is that the next sanitary tissue paper cannot be pulled up and falls when it is extracted, and the erection failure is 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 outlet forming portion 5 is formed by arranging the easy-to-tear line 50 annularly on the top surface 4C of the wrapping film 4 facing the sanitary tissue paper 2 at the uppermost position of the bundle 3 . The outlet forming portion 5 is formed on the top surface 4C of the package body 1 to pull out the sanitary tissue 2 by splitting and separating the easy-to-tear line 50 and removing the range surrounded by the easy-to-tear line 50 . The opening part is the extraction port 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; The width direction outward of the bundle 3 becomes wider gradually away from the widening portion 51;

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 to form the easy-to-break line 50 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 edge part 50P of the end part 5B) is comprised by the easy-to-break line 50 which arrange|positions the cut part 50C and the half cut part 50H alternately. In the shape of the take-out opening forming portion 5 shown in FIGS. 1 to 5 , in particular, the range of more than 80% of the portion constituting the edge of the curved convex portion 53 is in which the cut portion 50C and the half-cut portion 50H are alternately arranged. Part 50P. In addition, in the curved convex portion 53, preferably 90% or more, particularly preferably 95% or more, may be a portion where the cut portion 50C and the half-cut portion 50H are alternately arranged. The entire range may be configured to be the easy-to-break line in which the cut portion 50C and the half-cut portion 50H are alternately arranged.

For the cut portion 50C and the half cut portion 50H, as shown in the plan view of FIG. 6(a) and the cross section along the line b-b of FIG. 6(a), the cut portion 50C is free from the bundle 3 is the part that is completely cut off in the thickness direction Z of the packaging film 4 from the surface side 41 that faces the bundle 3, that is, the surface side 41 to the side that faces the bundle 3, that is, the back side 42; From the front side 41 to the back side 42 , a portion cut into a predetermined depth range L8 in the thickness direction Z is not completely cut. In this way, compared to the part where the cut part 50C and the uncut part 50U are not cut in parallel at all, the part where the cut part 50C and the half-cut part 50H are arranged alternately becomes the most effective when the easy-to-crack line is torn. When it is opened, it is easy to make the cleavage progress continuously and smoothly. This is because the difference in force between the cut portion 50C and the half-cut portion 50H is smaller than the difference between the cut portion 50C and the uncut portion 50U for the difference in force required to tear the wrapping film 4, so it can be easily made. Cleaving from the cut portion 50C to the half-cut portion 50H, and from the half-cut portion 50H to the cut portion 50C proceeds continuously and smoothly.

In addition, especially in the shape of the outlet forming portion 5 shown in FIGS. 1 to 5 , it is also desirable to have alternately arranged cutting portions 50C for the portion constituting the edge of the widening portion 52 continuous with the curved convex portion 53 . As well as the part of the half-cut part 50H, the curved convex part 53 has a part in which the cut part 50C and the half-cut part 50H are alternately arranged. In particular, 80% or more of the portion constituting the edge of the widened portion 52 may be a portion where the cut portion 50C and the half-cut portion 50H are alternately arranged. It is preferably 90% or more, particularly preferably 95% or more, and becomes a portion where the cut portion 50C and the half-cut portion 50H are alternately arranged. The entire range may be configured to be the easy-to-break line in which the cut portion 50C and the half-cut portion 50H are alternately arranged.

Here, the half-cut portion 50H is desirably cut to a depth of 20% or more of the thickness L9 of the packaging film. If the incision is 20% or more, continuous and smooth cleavage between the cut portion 50C and the half-cut portion 50H can be sufficiently generated when an opening is formed by an unsealing operation. The upper limit of the depth of cut is not limited, but if it is set to be less than 80%, more preferably less than 60%, accidental cracks will not easily occur.

Under the general unsealing operation, the unsealing operation is to pull continuously from one end portion 5A of the range surrounded by the easy-to-break line 50 toward the other end portion 5B. Regarding the take-out opening forming portion 5 of the present invention, it is the easiest The split part is located at the last split position, that is, the part where the cut part 50C and the half cut part 50H are arranged alternately is located at the end part in the width direction (the other end part 5B in the illustrated example). Therefore, even if the unsealing operation is performed by continuously pulling from one end portion 5A toward the other end portion 5B, there is little possibility of an unexpected tear in the packaging film 4 at the other end portion 5B cut off last. In particular, the roughly gourd-shaped shape with the narrowed portion 51, the widened portion 52, and the curved convex portion 53 as shown in FIGS. In the ejection port forming portion with a preferable numerical value, the range of the easy-to-break line constituting the edge portion of the curved convex portion 53 is long and arranged along the depth direction, so the difference between the pulling direction at the time of unsealing and the tearing direction of the easy-to-break line The crossing angle is large, and it is a shape that tends to cause cracks in the packaging film 4 during the unsealing operation. However, since the cut portion 50C and the half cut portion 50H are arranged alternately, the possibility of cracking at the end portion is extremely small. This is particularly effective for pillow packs and gusset packs in which the stretching direction of the packaging film 4 is perpendicular to the longitudinal direction of the outlet forming portion 5 so that cracks are likely to occur.

In addition, in the easy-to-break line 50 constituting the edge of the outlet forming part, the part where the cut part 50C and the half-cut part 50H are arranged alternately may be provided at both ends of the outlet forming part 5, or may be It is 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.

The ratio of the dimensions of the cut portion 50C and the half-cut portion 50H at the end of the extraction port forming portion 5 is not necessarily limited, and may be in the following range. The size of the cut portion 50C is 5 mm or more and 20 mm or less. , preferably not less than 7 mm and not more than 13 mm; the size of the half-cut portion 50H is not less than 0.3 mm and not more than 3 mm, preferably not less than 0.7 mm and not more than 1.3 mm. Within this range, the cleavage from the cut portion 50C to the half-cut portion 50H and from the half-cut portion 50H to the cut portion 50C can be easily continuously and smoothly progressed, and accidental rips are less likely to occur.

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 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 cut portion 50C and the half-cut portion 50H are alternately arranged can be formed as a slit cut or the like. The slit is provided with an eyelet, an uncut portion (non-cut portion). However, it is not limited thereto, and may be a portion in which the cut portion 50C and the half-cut portion 50H are alternately arranged.

When it is set as a perforation, the kind is not limited. For example, the cutting portion 50C is a straight line, that is, a normal hole; the cutting portion is a hole, that is, a micro hole; and the shape of the cutting portion is a Y-shaped, approximately L-shaped, or ㄑ-shaped hole. 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 shapes having the narrowed portion 51, the widened portion 52 and the curved convex portion 53 shown in FIGS. The pulling direction of the end portion 5B during the unsealing operation is the same, so it is desirable to configure the perforation with an uncut portion instead of a half-cut portion. This is because it is desirable that the edge of the widened portion 51 is unlikely to be accidentally cracked.

The ratio of cutting and connecting in the slit with holes or non-cutting parts can be specified as an appropriate interval according to the easy breakability of the film used, and the size of the cutting part can be 0.8mm or more. Also, it is appropriately designed in the range of 20.0 mm or less and the size of the non-cut portion (connecting portion or uncut portion) is in the range of 0.3 mm to 5.0 mm.

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 50H 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 folded and stacked into 200 sheets of paper towels (elleair refreshing hand towels manufactured by Daio Paper Co., Ltd.) with a mass per unit area of 35.5 g/m ² and a paper thickness of 255 μm. An extractable bundle of groups. 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 perform the operation of pulling 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. Let N=10 (the number of times of unsealing operations), and if there is a case where a crack occurs, it is evaluated as "present", and if there is no case where a crack occurs, it is evaluated as "no".

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 portion constituting the edge of the end portion (curved convex portion) is set as the portion where the cut portion and the half-cut portion are alternately arranged, even if the maximum dimension in the depth direction of the extraction port 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 body 2: toilet paper 2A: The inner side that turned back 2B: Folded sheet 2C: Turn back the edge 2R: The root of the tissue paper exposed from the exit 3: Bundles (bundles) of toilet tissue 3A: Short Side Side 3B: Long Side Side 3C: Top and bottom surfaces of bundles 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 5A, 5B: Ends in the longitudinal direction 5T: Free Film 6: take out the outlet 6E: Remove the edge of the outlet 6H: Take out the recessed part of the mouth 41: The surface side of the packaging film 42: The back side of the packaging film 50: easy to split line 50C: cutting part 50H: half-cut part 50U: Non-cut part (uncut part, connecting part) 50P: Parts with cut-off parts and half-cut parts arranged alternately 51: widening part 51A: Roughly trapezoidal edge piece 52: widening part 53: curved convex part ∠α: taper angle of widened part L1: Dimensions in the width direction (longitudinal direction) of the opening forming part L2: Dimensions in the width direction (long side direction) of the top surface of the bundle L3: Maximum dimension in the depth direction (short side direction) of the extraction opening forming part (dimension in the depth direction of the curved convex part) L4: Dimensions in the depth direction (short side direction) of the top surface of the bundle L5: Dimensions in the width direction (long side direction) of the narrowed part L6: Dimensions in the depth direction (short side direction) of the narrowed part L7: Swelling dimension in the width direction of the curved protrusion L8: Depth of half-cut part L9: Thickness of packaging film L10: The range from the middle of the widened part on one side in the depth direction to the position beyond the outer end of the curved convex part 105: Take out the outlet forming part 105A: Take out one end of the opening forming part 105B: take out the other end of the opening forming part 105P: Crack in film 150: eyelet 150e: Eyelets at the ends in the width direction X: Long side direction (width direction) Y: The direction perpendicular to the long side direction (depth direction) Z: Thickness direction of packaging film

FIG. 1 is a perspective view for explaining a package of the present invention. Fig. 2 is a perspective view for explaining a bundle of facial tissue. 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 for explaining a take-out opening forming portion. Fig. 6 is a schematic diagram for explaining a half-cut portion. FIG. 7 is a diagram for explaining another example of an extraction opening forming portion. FIG. 8 is a diagram for explaining an example of another shape of the 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 (7)

A package comprising bundles of sanitary tissue paper wrapped in a soft resin packaging film, characterized in that it has a take-out opening forming portion, and the easy-to-split thread is arranged in a loop on the package. The top surface of the body is formed; In addition, the edge of at least one end portion in the width direction of the extraction port forming portion is constituted by an easy-tear line in which cut portions and half-cut portions are alternately arranged. The package according to claim 1, wherein the half-cut portion is cut to a depth of 20% or more of the thickness of the packaging film. 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 from the central portion in the depth direction to the width direction. Extending, the widening portion is continuous at the end of the narrowing portion and gradually widens as it moves outward in the width direction away from the widening portion, and the curved convex portion is continuous with the widening portion and faces outward in the width direction bulge into a convex shape; In addition, the part of the edge of the curved convex part constituting at least one of the easy-to-split lines has a part in which the cut part and the half-cut part are alternately arranged. The package according to claim 3, wherein more than 80% of the portion constituting the edge of the curved convex portion is a portion where the cut portion and the half-cut portion are alternately arranged. 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 claim 3, wherein the part of the easy-to-break line that constitutes the edge of the widened part that is continuous with the curved convex part has a part in which the cut part and the half cut part are arranged alternately , the curved convex portion has portions in which the aforementioned cut portions and the aforementioned half-cut portions are alternately arranged. The package according to any one of Claims 3 to 6, wherein the dimension in the width direction of the outlet forming part is 70% or more of the dimension in the width direction of the top surface of the bundle, and the maximum dimension in the depth direction is The dimension is 10% to 40% of the dimension in 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 in the width direction of the top surface of the aforementioned bundle, and The dimension in the depth direction is 0.5% to 10% of the dimension in the depth direction of the top surface of the bundle.

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