JP2022156860A - package - Google Patents

Abstract

To provide a film-packaged package that is excellent in performance of extracting sanitary tissue papers.SOLUTION: A package, in which a bundle of sanitary tissue papers is packaged with a packaging film made of soft resin, has an extraction port formation part formed by annularly arranging an easy-to-open cutting line on an upper surface thereof. The extraction port formation part is formed to have a narrowed portion extending in a width direction at a central part in a depth direction, a widened portion, leading to an end portion of the narrowed portion, which is gradually widened as separating from the narrowed portion toward outside in the width direction, and a curved convex portion, leading to the widened portion, which swells out convexly toward outside in the width direction, where a length in the width direction of the curved convex portion is 70% or more of a width of the upper surface and the maximum length in the depth direction thereof is 10-40% of a length in the depth direction of the upper surface, a length in the width direction of the narrowed portion is 50-70% of the length of the upper surface, and a length in the depth direction of the narrowed portion is 0.5-10% of the length in the depth direction of the upper surface.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a package in which a bundle of folded sanitary thin paper such as paper towels is wrapped in a flexible packaging film.

As a packaging form of sanitary thin paper such as paper towels and facial tissues, a so-called pop-up type bundle in which one or more plies are folded and stacked, and when the top sheet is picked and pulled out, a part of the next sheet is pulled out. A form of packaging with a resin-made flexible packaging film is known.

In the past, such sanitary thin paper packages generally used simple linear perforations for forming the outlet and formed a slit-shaped outlet on the top surface. . However, if the slit length is long, the slit-shaped outlet has a problem that the sheets will fall inside when the number of sheets remaining inside is reduced. In addition, it is difficult to pull out a single sheet from the film, and the pull-out resistance becomes too high at the beginning and end of use, and when the sheet is pulled out, the packaging film may be lifted up and cannot be popped up.

Therefore, in order to solve the problem of the slit-shaped outlet, perforations for forming the outlet are arranged in an elongated annular shape extending in the longitudinal direction by a die-cutting technique such as die cutting, so that it can be removed like an ellipse. It has been practiced to widen the opening of the outlet in the depth direction (Patent Documents 1 and 2 below). Further, in order to further improve the take-out property, the take-out port is formed in a gourd shape with widened ends in the width direction.

However, conventional approximately oval or approximately gourd-shaped outlets emphasize softness and suppleness. It is designed mainly for sanitary tissue paper, and is easy to use for wiping the skin other than the face and wiping items. It is not necessarily suitable for sanitary tissue papers such as paper towels, which are mainly used for wiping hands after washing hands, which are more rigid than tissue papers.

In order to improve the ease of taking out such sanitary thin paper, it is conceivable to form a wider outlet in the depth direction. It is difficult to design the same as , and if the depth direction of the outlet is simply widened, the next sanitary tissue paper will not be pulled up when it pops up and will fall down. Sexual problems are very likely to arise.

JP 2018-052559 A JP 2018-058654 A

Therefore, in view of the above problems, the main object of the present invention is to provide a package which is excellent in drawing out sanitary thin paper, particularly hard sanitary thin paper such as paper towels.

Means for solving the above problems are as follows.
The first means is
A film-wrapped tissue in which a bundle of tissue paper is wrapped in a flexible resin-made wrapping film,
Having an outlet forming portion formed by arranging an easy-cleavage line in a ring on the upper surface,
The outlet forming part is
A narrow portion extending in the width direction at the central portion in the depth direction, a widened portion continuously extending from the end of the narrow portion and gradually widening outward in the width direction as the distance from the narrow portion increases, and the widened portion. and a curved convex portion that continuously bulges outward in the width direction,
The length in the width direction is 70% or more of the width of the top surface, the maximum length in the depth direction is 10 to 40% of the length in the depth direction of the top surface, and the length in the width direction of the narrow portion is 50 to 70% of the length of the upper surface, and the length of the narrow portion in the depth direction is 0.5 to 10% of the length of the upper surface in the depth direction.
A film-wrapped tissue characterized by:

The second means is
The film-wrapped tissue according to the first means, wherein the length of the curved convex portion in the depth direction is 25 to 45 mm, and the bulging length in the width direction is 2.5 to 12.5 mm.

ADVANTAGE OF THE INVENTION According to this invention, the packaging body which is excellent in the pull-out property of the sanitary thin paper, especially the hard sanitary thin paper like a paper towel is provided.

It is a perspective view for demonstrating the package which concerns on this invention. FIG. 4 is a perspective view for explaining a tissue paper bundle; It is a top view for demonstrating an outlet formation part. It is a perspective view for demonstrating the usage condition of the package which concerns on this invention. It is a partially enlarged view for explaining an outlet forming portion having a deformed cut portion. It is a partially enlarged view for explaining another outlet forming portion having a deformed cut portion. It is a partially enlarged view for explaining an outlet forming portion having a convex cut portion. It is a partially enlarged view for explaining another form of the convex cut portion. FIG. 10 is a perspective view for explaining a usage mode of a package having an outlet forming portion having a convex cut portion; It is a partially enlarged view for explaining an outlet forming portion having a half-cut portion. It is the front view and sectional drawing for demonstrating a half cut part. It is a figure for demonstrating another example of a form of an outlet formation part. FIG. 10 is a diagram for explaining tearing at the time of forming the outlet;

Embodiments of the present invention will be described below with reference to FIGS. 1 to 12 and FIG. 13 showing a comparative embodiment. It should be noted that directions such as up-down direction and left-right direction in the present invention and this specification are changed depending on the orientation of the package, and do not mean the absolute direction of the space. Further, rigidity is sometimes referred to as stiffness, rigidity, and stiffness of paper.

A packaging body 1 according to the present invention is a bundle 3 of sanitary thin paper sheets 2 such as paper towels folded and stacked, and wrapped in a flexible packaging film 4. An outlet forming portion 5 is provided on an upper surface 4C. have. The package 1 has a substantially hexahedral shape having a lower surface 4D facing the upper surface 4C and long side surfaces 4B and short side surfaces 4A located between the upper surface 4C and the lower surface 4D so as to approximate the shape of the bundle 3. None.

Figures 1-4 show embodiments of gusset packaging. The gusset packaging of this embodiment is pillow packaging with a gusset, in which a bundle 3 as an object to be packaged is wrapped in a cylindrical shape so that openings are formed at both ends in the longitudinal direction with a packaging film 4, and the winding is performed. The portion 4X that overlaps in the direction is adhered at the bottom of the bundle 3 by fusion treatment or adhesive, and the edge of the portion extending beyond the short side surface 3A of the bundle 3 is pressed vertically while forming a gusset. The short side 4A is used as a sealing surface by bonding with a fusion process or an adhesive. In this gusset packaging, the sealing surface, which is the short side surface 4A, faces the short side surface 3A of the bundle 3, and the long side surface 4B, which is the gusset, faces the long side surface 3B, which is the folding surface of the bundle 3. However, in the present invention, the packaging form of the package 1 is not limited. A simple pillow packaging without a gusset may be used, or other appropriate packaging forms such as overlap packaging, also called caramel packaging, formed by overlapping and fused flaps on the short sides may be used.

The bundle 3 of the sanitary thin paper 2 contained in the package 1 according to the present invention is a so-called pop-up bundle. As shown particularly in FIG. 2, this bundle 3 is such that the rectangular sanitary thin paper 2 is folded in two, and the folded pieces 2B of the other sanitary thin papers 2 located above and below are positioned on the folded inner side 2A. A plurality of sanitary thin paper sheets 2 are folded and laminated, and has a pair of longitudinal side surfaces 3B where the folding edges 2C of each sanitary thin paper sheet 2 are arranged, a pair of short side surfaces 3A where the folding edges 2C are not arranged, and further the short side surfaces. It has a substantially rectangular parallelepiped shape having a pair of flat surfaces (upper and lower surfaces) 3C that are connected to 3A and longitudinal side surfaces 3B.

The number of sets of the sanitary thin paper 2 constituting the bundle 3 is not limited, but can be 30 to 240 sets with one ply or multiple plies as one set. The size of the bundle 3 is also not limited, but a bundle of 200 sets of sanitary thin paper is preferably 30 to 100 mm in height x 150 to 250 mm in the longitudinal direction (width) x 100 to 130 mm in the lateral direction (depth). . Further, when the height of the bundle is shorter than the length of the upper surface of the bundle in the depth direction, the pop-up failure improvement effect of the present invention is 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 impaired, but the gap between the bundle and the packaging film is preferably in the range of 0 to 30 mm. The bundle 3 may be wrapped in a slightly compressed state in the vertical direction with the wrapping film.

Each of the sanitary thin papers 2 constituting the bundle 3 has a single-layer structure of one sheet or a laminated structure of a plurality of sheets. Although the number of plies is not limited, it is preferable to use one layer (1 ply) or two layers (2 plies). Although the basis weight per ply is not limited, it is preferably 10 to 40 g/m ² . Desirably, the mass per set is 1.0 to 2.5 g. The sanitary thin paper with one or two plies of sheets having the above basis weight is particularly suitable for paper towels suitable for wiping hands after washing hands. Furthermore, it is desirable that the thickness of one set of this sanitary thin paper is 100 to 500 μm. Sanitary thin paper with such a number of plies, a basis weight, and a paper thickness is the following sanitary paper at the time of pop-up due to the shape of the characteristic outlet forming part having the narrow width part, the wide part, and the curved convex part, which are the configurations of the present invention. It is highly effective in improving pop-up defects in which the thin paper falls without being pulled up, and erection defects in which the package does not stand up and falls down.

The basis weight is based on the measurement method of JIS P 8124 (1998). The grammage per ply can be calculated by grammage=sheet weight per set/(sheet area×number of plies). In addition, the thickness of the paper was determined by sufficiently conditioning the test piece under the conditions of JIS P 8111 (1998) and then using a dial thickness gauge (thickness measuring instrument) "PEACOCK G type" (manufactured by Ozaki Seisakusho Co., Ltd.) under the same conditions. and the value measured in the state of multiple plies using an equivalent machine.

Moreover, the sanitary thin paper 2 according to the present invention is a dry type, not a so-called wet type that is impregnated with a chemical solution. Therefore, the bundle 3 formed by the sanitary thin paper 2 contains a lot of air. Among the dry-type sanitary thin papers 2, there is also a chemical-imparted type in which a chemical solution such as a moisturizing component that increases moisture by absorbing moisture such as polyol represented by glycerin is added. good too.

The raw material pulp that constitutes the sanitary thin paper 2 is not limited. A mixture of softwood-derived pulp such as NBKP and hardwood-derived pulp such as LBKP may be mentioned. In addition, waste paper pulp may be blended, or waste paper pulp may be used alone. In the present invention, it is preferable that the softwood-derived pulp is more than 50% in order to exhibit particularly excellent effects in sanitary thin papers such as paper towels that have strong stiffness and high rigidity.

Although the dry tensile strength of the sanitary thin paper 2 is not limited, those having a longitudinal direction of 1000 to 3000 cN/25 mm and a lateral direction of 250 to 1500 cN/25 mm are particularly suitable for the present invention. Dry tensile strength is measured by a method according to JIS P8113 (1998). As a measuring device, Minebea Co., Ltd. "Universal Tensile Compression Tester TG-200N" and its equivalent can be used.

The outlet forming portion 5 of the package 1 according to the present invention is formed by annularly arranging an easy tear line 50 on the upper surface 4C facing the uppermost sanitary thin paper 2 of the bundle 3 of the packaging film 4 . Note that the term “annular” in this specification does not mean that the shape is limited to a circular shape or an elliptical shape, but means a shape in which a closed region is formed. Such an outlet forming portion 5 tears the easy-cleavage line 50, separates and removes the range surrounded by the easy-cleavage line 50, and draws out the sanitary thin paper 2 to the upper surface 4C of the package 1. An outlet 6, which is an opening of the is formed. In the packaging body 1 according to the present invention, since the bundle 3 is of a pop-up type, when one sheet of sanitary thin paper 2 at the top of the bundle 3 is pulled out from the formed outlet, the next sanitary sheet located immediately below it is pulled out. A part of the thin paper comes to be exposed from the outlet. In addition, since the outlet forming portion 5 has the easy-cleavage lines 50 arranged in a ring, the outlet 6 formed by separating and removing the range surrounded by the easy-cleavage lines 50 is formed only in a straight line. It does not have a slit shape, but has a certain width in the depth direction. Such outlet-forming portion 5 is formed by tearing off a range surrounded by easy-cleavage line 50 so as to continuously pull from one end portion 5A toward the other end portion 5B. Since the film in the range of can be separated and removed, it is excellent in operability at the time of opening. In this specification, the end located on the left side of the drawing is described as one end 5A, and the end located on the right side is described as the other end 5B. These can be replaced.

Here, the outlet forming portion 5 of the package 1 according to the present invention is characterized by the narrow portion 51 extending in the width direction at the central portion in the depth direction of the upper surface 4C and the end portions of the narrow portion 51. and a widened portion 52 that gradually widens outward in the width direction of the bundle 3 as it moves away from the narrow portion 51 and continues to the widened portion 52 and bulges outward in the width direction of the bundle 3 . In particular, the length L1 in the width direction of the entire outlet forming portion 5 is 70% or more of the width L2 of the upper surface of the bundle 3, and the outlet forming portion 5 The maximum length L3 in the depth direction of the entire bundle 3 is 10 to 40% of the length L4 in the depth direction of the bundle 3, and the length L5 in the width direction of the narrow portion is 50 to 50% of the length L2 of the upper surface of the bundle 3. 70%, and the length L6 in the depth direction is 0.5 to 10% of the length L3 of the upper surface of the bundle 3 in the depth direction.

The outlet 6 formed by the outlet forming portion 5 has a substantially trapezoidal free edge piece 51A in the vicinity of the edge extending from the narrow width portion 51 to the widened portion 52, which is easily movable in the vertical direction. When a set of sanitary thin paper sheets 2 is pulled out from the tray, the edge piece 51A is deformed so that it can be slightly turned up in the direction of pulling out, and particularly as shown in FIG. In response, they lean back and support it. In addition, in the outlet forming portion 5 according to the present invention within the above range, in particular, because of the shape having the widened portion 52 that continues from the narrow portion 51 that is very narrow in the depth direction to the curved convex portion 53 that is very wide in the depth direction, A free edge piece 51A formed in the vicinity of the edge of the narrow portion 51 is very wide and large in the outlet 6 formed. Therefore, when the sanitary thin paper 2 is pulled out, the space between the narrow parts 51 can be widened, and the sanitary thin paper 2 having a relatively high rigidity can be smoothly taken out from the bundle 3.例文帳に追加Further, the edge piece 51A firmly leans against the sanitary thin paper 2 having high rigidity, thereby enhancing the effect of preventing the sagging. Since the portion related to the narrow portion 51 opens wide, it is difficult to form a clear fold line at the boundary between the short side 4A and the upper surface 4C, especially in gusset packaging and pillow packaging, and the upper surface of the package 1 The packaging film at the position is in a packaging form that is easily deformed, or the sanitary thin paper to be enclosed is a highly rigid sanitary thin paper 2 such as a paper towel with the above basis weight and paper thickness, and the upper surface position of the package 1 is deformed when it is pulled out. Even if the sanitary thin paper 2 is easily pulled out, the whole upper surface is easily maintained flat without being distorted when the sanitary thin paper 2 is pulled out, and when the sanitary thin paper 2 is taken out one by one, it is particularly stable and easy to take out.

In addition, since the outlet forming portion 5 configured according to the present invention is a curved convex portion 53 that is wide in the depth direction, the length of the edge of the curved convex portion 53 is increased and the width of the outlet forming portion 5 is increased. A deep depression 6H is formed between the portion 52 and the curved convex portion 53 when the outlet 6 is formed. Therefore, the root portion 2R of the next sanitary thin paper, which is partially exposed from the outlet 6 following the sanitary thin paper pulled out from the bundle 3, is deformed so as to be gently rolled along the edge 6E of the curved convex portion 53. . Since the sanitary thin paper 2 having a high rigidity is hard to be bent, the uprightness is enhanced by gentle winding. Furthermore, since the root portion 2R of the next sanitary thin paper partly exposed from the outlet 6 fits into the deep recessed portion 6H, the uprightness is further enhanced. As described above, in the outlet forming portion 5 according to the present invention, the pop-up failure due to the depression of the inside of the packaging film of the sanitary thin paper, which is likely to occur when the sanitary thin paper has high rigidity, is less likely to occur due to the above action. This action and effect is particularly effective in combination with the sanitary thin paper having the suitable basis weight and paper thickness as well as the suitable packaging film described later.

It is particularly desirable that the widened portion 52 be arranged such that the easy-cleavage line 50 gradually becomes steeper with respect to the width direction. Moreover, it is desirable that the easy-cleavage line 50 forming the edge of the widened portion 52 has a taper angle ∠α of 25 to 60 degrees with respect to the width direction.

Further, it is desirable that the easy-cleavage line 50 is formed in a curved line and smoothly connected from the widened portion 52 to the curved convex portion 53 . When the easy-cleavage line 50 is arranged in this way, the easy-cleavage line 50 is easily cleaved smoothly from the widened portion 52 toward the curved convex portion 53 .

It is desirable that the length L3 of the curved convex portion 53 in the depth direction is specifically 25 to 45 mm, and the bulging length L7 in the width direction is 2.5 to 12.5 mm.

On the other hand, specific examples of the flexible resin-made packaging film 4 constituting the exterior of the package 1 include polyethylene film, polypropylene film, polyester film, polyethylene terephthalate film, nylon film, vinylidene chloride film, and ethylene vinyl alcohol. Examples include monolayer films of copolymers, appropriately laminated laminate films containing these films, and gas barrier films obtained by subjecting these films to surface treatment such as aluminum vapor deposition. Biomass films derived from plant materials such as sugarcane, potato (starch), and corn can also be used. The use of such biomass films is desirable from the viewpoint of environmental protection.

A polypropylene film and a polyethylene film are particularly suitable. Moreover, the packaging film 4 may be a satin-finished film that is excellent in design and touch. The melting point of the film is preferably 150° C. or lower. The lower the melting point of the packaging film, the lower the heat-sealing treatment can be performed, but the practical lower limit is 80°C. Examples of polypropylene include unstretched polypropylene film (CPP), and examples of polyethylene film include linear low-density polyethylene film (LLDPE), low-density polyethylene film (LDPE), and medium-density polyethylene film (MDPE).

Furthermore, if an odorous item such as scented tissue paper is to be packaged, an ethylene vinyl alcohol copolymer resin film or a polyethylene terephthalate resin film, which are excellent in scent retention, is desirable. Even if it is a multi-layer resin film in which a polyethylene resin film or a polypropylene resin film is laminated on one or both sides of an ethylene vinyl alcohol copolymer resin film or a polyethylene terephthalate resin film to enhance the heat-sealing property. good.

Here, the thickness of the packaging film 4 may be selected as appropriate, but the thickness measured according to JIS P 8118 (1998) is preferably 25 to 75 μm. If the thickness is 25 to 75 μm, the effects of the present invention can be exhibited particularly effectively. For the thickness, after sufficiently conditioning the humidity of the measurement sample under the conditions of JIS P 8111 (1998), dial thickness gauge (thickness measuring instrument) "PEACOCK G-1A type" (manufactured by Ozaki Seisakusho Co., Ltd.) and its equivalent Measure using

Moreover, it is desirable that the softness of the packaging film 4 of the package 1 is smaller than the softness of the sanitary thin paper 2 . When the softness of the packaging film is smaller than that of the sanitary thin paper 2, the effects of the present invention can be exhibited particularly effectively.

The easy tear line 50 constituting the outlet forming portion 5 according to the present invention can be a perforation, a slit cut provided with an uncut portion (non-cut portion), or the like. However, it is not limited to this. The type of perforations is not limited as long as the cut portions 50C and the non-cut portions 50U are alternately arranged. Examples include normal perforations in which the cut portion 50C is a straight line, micro perforations in which the cut portion is a hole, and zipper perforations in which the shape of the cut portion is Y-shaped, approximately L-shaped, or <-shaped. A slit cut is a portion obtained by cutting a film into a slit shape, and by having a non-cut portion, the non-cut portion and the cut portion are arranged alternately. A slit cut having a non-cut portion may be simply referred to as a slit cut. Slit cuts with perforations and non-cut parts may not be distinguished, but in the present invention, slit cuts are defined as slits when the cut part is less than 2 pitches, that is, when the cut part of the same length does not continue twice It's called cut. In general, the slit cut is formed so that the length of the cut portion is longer than the perforations.

The cut tie ratio of the slit cut with perforations and non-cut parts is determined at an appropriate interval depending on the ease of breaking of the film used, but the length of the cut part is 0.8 mm or more and 20.0 mm or less, non-cut The length of the cut portion (tie portion or uncut portion) is preferably designed appropriately within the range of 0.3 mm or more and 5.0 mm or less.

Here, as shown in FIG. 13(a), in the outlet forming portion 105 formed by annularly arranging the perforations 150 by a die-cutting technique such as die-cutting, the longitudinal direction X is formed as shown in FIG. 13(b). While there is an advantage that an outlet can be easily formed by tearing off the annular perforated area 105Z from the one end 105A toward the other end 105B, the other end 105B is finally opened by such an opening operation. 13 ( As shown in c), the tearing of the perforations 150 does not occur smoothly and continuously at this end, particularly in the vicinity of the perforations 150e at the end of 105B, and as shown in FIG. It is conceivable that an unintended tear 105P occurs at the end. As the width direction end of the outlet forming portion 105 is expanded in the depth direction Y, the perforation range that is closer to the direction perpendicular to the tear-off direction becomes longer, and this tear occurs. It is thought that it will become easier.

In order to reduce the risk of such tearing, in the outlet forming portion 5 according to the present invention, at least one end (the other end 5B in the illustrated example) in the width direction of the outlet forming portion 5 has an edge. 5 and 6, the portion 50P includes a deformed cut portion 50D having an end cut portion 50e and a portion cut into a doglegged shape at one end or both ends, and a non-cut portion. 50U can be a characteristic perforation 50P ¹ alternately arranged. In particular, 80% or more, preferably 90% or more, particularly preferably 95% or more of the portion constituting the edge of the curved convex portion 53 is alternately arranged with the deformed cut portion 50D and the uncut portion 50U. A portion 50P is desirable. Alternatively, the entire range of the curved convex portion 53 may be composed of an easy-cleavage line in which deformable cut portions 50D and non-cut portions 50U are alternately arranged.

More specifically, as shown in FIGS. 5 and 6, the modified cut portion 50D is formed at one end or both ends of the main cut portion 50m on a straight or substantially straight gently curved line at a predetermined angle. The end cut portion 50e is continuously arranged, and one end or both end portions have a V-shaped cut portion. As shown in FIG. 5, the deformed cut portion 50D includes a deformed cut portion 50D1 formed in a doglegged shape at ^one end and a deformed cut portion 50D2 formed in a doglegged shape at ^both ends. There may be. As shown in FIG. 6(c), the end of one end cut portion 50e faces the outer side of the upper surface of the bundle 3 in the width direction, and the end of the other end cut portion 50e faces the central side of the upper surface of the bundle 3 in the width direction. There may be a deformed cut portion 50D ³ directed toward .

Furthermore, as an arrangement form of the deformed cut parts 50D in the portion 50P ¹ where the deformed cut parts 50D and the non-cut parts 50U are alternately arranged, as shown in FIGS. The ends of 50e may be arranged only toward the outer side in the width direction of the upper surface of the bundle 3, or, as in the form shown in FIG. Only the ones to which they are directed may be arranged. Furthermore, the ends of the end cut portions 50e may be directed outward in the width direction of the upper surface of the bundle 3 and may be directed toward the central side in the width direction of the upper surface of the bundle 3 together. Furthermore, as shown in FIG. 6(c), only the ends of the end cut portions 50e located at both ends in the depth direction of the upper surface of the bundle 3 face outward in the width direction of the upper surface, and the other end cut ends are It may be directed toward the center in the width direction of the upper surface.

When a general unsealing operation is performed to continuously pull from the one end 5A in the range surrounded by the easy tear line 50 toward the other end 5B, the deformed cut portion 50D at the end (the other end 5B in the illustrated example) is cut. and the uncut portions 50U are alternately arranged, if both the adjacent end cut portions 50e of the adjacent deformed cut portions D are directed outward in the width direction of the upper surface of the bundle ³ , or , the direction of extension of the adjacent end cut portions crosses in the approaching direction, so that the non-cut portion 50U between them can be easily formed. easy to cut. Further, when one of the adjacent end cut portions 50e of the adjacent modified cut portions D faces the width direction outer side of the upper surface of the bundle 3 and the other faces the width direction center side of the upper surface of the bundle 3, When a general unsealing operation is performed in which the range surrounded by the easy-cleavage line 50 is continuously pulled from the one end portion 5A toward the other end portion 5B, the uncut portion 50U therebetween is twisted immediately before cutting. Therefore, the film can be easily cut without tearing or stretching. In the case where one of the adjacent ends of the deformed cut portions D has the end cut portion 50e and the other does not have the end cut portion 50e, similarly, the range surrounded by the easy-cleavage line 50 from the one end portion 5A to the other When a general unsealing operation is performed by continuously pulling toward the end portion 5B, the uncut portion 50U between them is easily cut without tearing or stretching because the twist occurs immediately before cutting. . In this way, by forming a portion 50P ¹ in which the deformed cut portion 50D and the uncut portion 50U are alternately arranged at the end portion in the width direction (the other end portion 5B in the illustrated example), tearing at the time of unsealing is prevented. less likely to occur.

In addition, in the outlet forming portion 5 according to the present invention, in the portion 50P ¹ in which the deformed cut portions 50D and the non-cut portions 50U are alternately arranged, the position of the end of the deformed cut portion 50D is the main cut by the end cut portion 50e. Since the position is slightly shifted inward or outward in the width direction from the extending direction of the portion 50m, when the outlet 6 is formed, the portion that was the uncut portion 50U becomes slightly convex and has a serrated edge. For this reason, when drawing out a set of sanitary thin papers 2 from the bundle 3, the serrations are applied to the base portion 2R of the next set of sanitary thin papers 2, which is partially exposed from the take-out port following the taken out sanitary thin papers. The edge of the shape clamps the edge in the width direction of the sanitary thin paper 2 to enhance the prevention of falling.

Here, it is particularly preferable that, as shown in FIG. 5, the deformed cut portion 50D is positioned on the width direction extension line of the center C in the depth direction of the narrow portion 31, and the deformed cut portion is formed at both ends in the width direction. There is a modified cut portion ^50D2 having an end cut portion 50e directed outward, and a modified cut portion located further outward in the depth direction ^than the modified cut portion 50D2 is positioned deeper than the center of the narrow portion 32 in the depth direction. It is a modified cut portion 50D ¹ having an end cut portion directed outward in the width direction only at the end portion located outward. In the outlet forming portion 5 shown in FIG. 5, in a general unsealing operation in which the range surrounded by the easy tearing line 50 is continuously pulled from the one end portion 5A toward the other end portion 5B, the deformed cut portion 50D is deformed. The edge cut portions 50e of the adjacent modified cut portions 50D ¹ and 50D ² are present at positions on the outer side in the width direction preceding the edge having no edge cut portion ¹ in the tensile direction. Therefore, when the non-cut portion 50U therebetween is torn during the opening operation, even if a minute tear occurs in the packaging film, the tear easily continues to the already torn end cut portion 50e immediately after that. , it becomes difficult to tear further.

When the modified cut portion 50D is provided at the end of the outlet forming portion 5, the length ratio to the uncut portion 50U is not necessarily limited, but the length L8 of the modified cut portion 50D is not limited, but is 5 mm or more and 20 mm. Below, preferably 7 mm or more and 13 mm or less is desirable. Moreover, it is desirable that the length L9 of the end cut portion 50e of the modified cut portion 50D is 0.2 mm or more and 3.0 mm or less, preferably 0.5 mm or more and 2.5 mm or less. Furthermore, it is desirable that the length L11 of the uncut portion 50U between the deformed cut portions 50D is 0.2 mm or more and 3.0 mm or less, preferably 0.3 mm or more and 2.0 mm or less. Within this range, tearing is extremely difficult to occur between the deformed cut portions 50D, and the non-cut portions 50U are cut, so that the tearing progresses smoothly and continuously.

Also, the angle ∠β between the main cut portion 50m and the end cut portion 50e in the doglegged portion of the modified cut portion 50D should be 90° or more. It is preferably 100° or more, more preferably 120° or more. In addition, it is desirable that the portion from the main cut portion 50m to the end cut portion 50e is chamfered. R 0.2 to 1.2, particularly preferably R 0.4 to 1.1. With this curvature, the opening of the cut portion is likely to proceed smoothly from the main cut portion 50m to the end cut portion 50e.

On the other hand, in the outlet forming part 5 according to the present invention, at least one end (the other end 5B in the illustrated example) in the width direction of the outlet forming part 5 is cut to reduce the risk of tearing when unsealing. As shown in FIGS. 7 and 8, the edge portion 50P includes a convex cut portion 50T tapered outward in the width direction and a base end portion of the convex cut portion 50T. can be a portion 50P ² configured by alternately disposing the non-cut portions 50U that connect the . In particular, 80% or more, preferably 90% or more, particularly preferably 95% or more of the portion constituting the edge of the curved convex portion 53 is a portion where the convex cut portion 50T and the non-cut portion 50U are alternately arranged. It is good that it is 50P ² . The entire range of the curved convex portion 53 may be composed of easy-cleavage lines in which convex cut portions 50T and non-cut portions 50U are alternately arranged. Although not shown, the convex cut portion may have a shape in which a plurality of convex shapes are connected and continuous at the base end portion. Although the number of continuous convex shapes is not necessarily limited, it is desirable to be about 2 to 5. In the portion 50P ² where the convex cut portions and the non-cut portions are alternately arranged, a convex cut portion having only one convex shape and a convex cut portion having a continuous convex shape may be mixed. .

The shape of the convex cut portion 50T may be any shape as long as the outer side in the width direction is tapered. It can also be a trapezoidal shape as shown in FIG. 8(b). Further, the width direction outside is tapered means that the tip of the convex cut portion 50T is not directed in the direction parallel to the depth direction Y and in the width direction center side. Preferably, the angle ∠γ with respect to the depth direction Y of the tip of the convex cut portion 50T is 15° or more, preferably 30° or more, and more preferably 45° or more. Further, the opening angle ∠Δ of the tip portion of the convex cut portion 50T is not necessarily limited as long as it is less than 180°, but is preferably 15 to 120°, more preferably 20 to 90°, and even more preferably 30 to 60°. is.

When the easy-cleavage line 50 is cleaved from the one end 5A toward the other end 5B and the opening operation is performed so as to be continuously pulled, the edge of the other end 5B having the convex cut portion 50T , the cut convex portion 50T that has already been cut exists at a position on the outer side in the width direction that precedes the uncut portion 50U between the base ends of the cut convex portions 50T in the pulling direction. When the non-cut portion 50U between the base ends of the convex cut portions 50T is torn during the opening operation, even if a minute tear occurs in the packaging film, the tear has already occurred immediately after that. The tear does not progress any further continuously from the cut portion 50T. In this way, at the end in the width direction (the other end 5B in the illustrated example), the convex cut portion 50T and the non-cut portion 50U connecting the base ends of the convex cut portion are alternately arranged. Forming 50P reduces the risk of cracking at each level.

Further, as shown in FIG. 9, a portion 50P configured by alternately arranging convex cut portions 50T tapering outward in the width direction and non-cut portions 50U connecting the base end portions of the convex cut portions 50T. ² becomes a jagged serrated edge on which a plurality of projections 6T are arranged when the outlet 6 is formed. When a set of sanitary thin papers 2 is pulled out from the bundle 3, these convex pieces 6T can be turned over in the direction in which the sanitary thin papers are pulled out. It does not prevent deformation into a highly upright shape by being caught along. In addition, the sanitary thin paper can be pulled out smoothly. On the other hand, it functions as a return for the root portion 2R of the next set of sanitary thin papers 2 partially exposed from the take-out port following the taken out sanitary thin papers, and contributes to preventing the recession. Furthermore, the edges of the sanitary thin paper 2 in the width direction are sandwiched between the convex pieces to further improve the prevention of falling.

It is desirable that the height L12 from the base end side to the tip end of the convex cut portion 50T is 0.1 mm or more. Although the upper limit is not necessarily limited, it is desirable to set it in a range not exceeding 10 mm. A preferred height of the convex cut is 0.5 to 7 mm, more preferably 1 to 5 mm. A convex cut portion having a height of less than 1.0 mm is called a microwave cut and can be formed by a technique. Such a low-height convex cut portion 50T is formed by a portion in which the convex cut portion 50T and the non-cut portion 50U connecting the base end portion of the convex cut portion are alternately arranged. The unevenness of the saw-toothed edge of the outlet 6 has an inconspicuous design.

Although the ratio of the length L13 between the base ends of both ends of the convex cut portion 50T and the length L14 of the non-cut portion 50U between the base ends of the adjacent convex cut portions 50T is not necessarily limited, The length L9 between the proximal ends is 5 mm or more and 20 mm or less, preferably 7 mm or more and 13 mm or less, and the length of the uncut portion 50U is 0.3 mm or more and 3 mm or less, preferably 0.7 mm. It is preferable to make the range between 1.3 mm and 1.3 mm. Within this range, unintended tearing does not occur, and smooth and continuous tearing tends to proceed.

On the other hand, in the outlet forming part 5 according to the present invention, at least one end (the other end 5B in the illustrated example) in the width direction of the outlet forming part 5 is cut to reduce the risk of tearing when unsealing. 10 and 11, the edge portion 50P can be a portion ^50P3 composed of alternate cut portions 50C and half-cut portions 50H. In particular, 80% or more, preferably 90% or more, particularly preferably 95% or more of the portion constituting the edge of the curved convex portion 53 is the portion 50P where the cut portions 50C and the half-cut portions 50H are alternately arranged. ³ is good. The entire range of the curved convex portion 53 may be composed of an easy-cleavage line in which cut portions 50C and half-cut portions 50H are alternately arranged.

The cut portion 50C and the half-cut portion 50H are shown in plan view in FIG. The half-cut portion 50H is completely cut from the front side 41, which is the side not facing the bundle 3, to the back side 42, which is the side facing the bundle 3. It is a portion cut to a predetermined depth range L15 in the thickness direction Z from the surface side 41 to the back surface side 42 . In this way, the portion where the cut portions 50C and the half-cut portions 50H are alternately arranged has a more easily tearable line than the portion where the cut portions 50C and the uncut portions 50U with no cuts are alternately arranged. At the time of cleaving, the cleaving tends to progress continuously and smoothly. This is because the difference between the cut portion 50C and the half-cut portion 50H is smaller than the difference between the cut portion 50C and the non-cut portion 50U. This is because tearing progresses continuously and smoothly from 50C to the half-cut portion 50H and from the half-cut portion 50H to the cut portion 50C. Therefore, even if the unsealing operation is performed by continuously pulling the outlet forming portion 5 from the one end portion 5A toward the other end portion 5B, the packaging film 4 is unintentionally removed at the other end portion 5B which is cut off last. less likely to tear.

Here, the half-cut portion 50H is preferably cut to a depth of 20% or more of the thickness L16 of the packaging film. If the cut is 20% or more, a continuous and smooth tear can be sufficiently generated between the cut portion 50C and the half-cut portion 50H when forming the outlet by the opening operation. The upper limit of the depth of cut is not limited, but if it is 80% or less, more preferably 60% or less, unintended tearing is less likely to occur.

The length ratio between the cut portion 50C and the half-cut portion 50H at the end of the outlet forming portion 5 is not necessarily limited, but the length of the cut portion 50C is 5 mm or more and 20 mm or less, preferably 7 mm or more and 13 mm. Hereinafter, the length of the half-cut portion 50H should be in the range of 0.3 mm or more and 3 mm or less, preferably 0.7 mm or more and 1.3 mm or less. Within this range, tearing progresses smoothly from the cut portion 50C to the half-cut portion 50H and from the half-cut portion 50H to the cut portion 50C, and unintended tearing hardly occurs.

In addition, in the easy tear line 50 constituting the edge of the outlet forming portion according to the present invention, half-cut portions are provided between the deformed cut portions 50D, between the convex cut portions, and between the cut portions at the perforations other than the end portions. may be

On the other hand, in the easy tear line 50 forming the edge of the outlet forming portion, portions 50P ¹ where the deformed cut portions 50D and the uncut portions 50U are alternately arranged are located at both ends of the outlet forming portion 5. may be present, or may be present only at one end. The portions 50P ² in which the convex cut portions 50T and the non-cut portions 50U are alternately arranged may also be located at both ends of the outlet forming portion 5, or may be located at only one end. The portions 50P3, which are formed by alternately arranging the cut portions 50C and the half-cut portions 50H ^, may be located at both ends of the outlet forming portion 5, or may be located at only one end. Here, if such end portions 50P ¹ , 50P ² and 50P ³ are formed only at one end portion, the opposite end portion, for example, as shown in FIG. A continuous cut portion 53C can be formed in a range L10 from the middle of the widened portion 52A on one side to a position exceeding the outer end 53t of the curved convex portion 53A. In this way, as shown in FIG. 12(b), a free piece 5T is formed in a range from one depth side to the outer side end at one end 5A of the outlet forming portion 5, and the free piece 5T is formed. It becomes easier to pick up and roll up, and the opening operation becomes easier.

In addition, the edge portion of the narrow portion 51 according to the present invention is uncut rather than a half-cut portion because the direction of pulling during the opening operation from the one end portion 5A to the other end portion 5B coincides with the extending direction. It is desirable to configure it with perforations having a part. This is desirable because it makes it difficult for the edge of the narrow portion 51 to unintentionally tear.

In addition, the easy-cleavage line 50 is a slit cut having perforations and a non-cut portion, including a portion where the cut portion 50C and the half-cut portion 50H are alternately arranged, for example, formed at once by die cutting. can do.

Next, Examples 1 to 5 of the present invention and Comparative Example 1 were prepared, and tests were conducted on the sinking of the sanitary thin paper and the tearing of the unsealed outlet. The shape of the outlet forming portion of the package according to Examples 1 to 5 is a substantially gourd shape having a narrow portion, a wide portion, and a curved convex portion as shown in FIGS. The outlet forming portion of the package according to Comparative Example 1 is a simple linear perforation.

A bundle of 1-ply paper towels (trade name: Raku La Cook Kitchen Paper, basis weight: 20 g/m 2 , paper thickness: 220 μm) was folded up in a pop-up manner to form a bundle of each example. Moreover, the packaging form according to each example is gusset packaging, and the stretching direction of the packaging film is a direction orthogonal to the width direction of the outlet forming portion.

In the "number of times of depression" test, the easy tearing line related to the outlet forming part is cleaved to form an outlet, and the paper towels constituting the bundle are pulled out from the outlet in order up to the last one. , counted the number of times the drop actually occurred.

"Openability" was evaluated by having a subject pick up one end of each sample and pull it toward the other end to open the sample, and check whether or not the other end of the outlet is torn. was evaluated. With N=10, the cases where cracks occurred were evaluated as "yes", and the cases where they did not occur were evaluated as "no".

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

From Table 1, it was confirmed that Comparative Example 1, in which the outlet forming portion was a single perforation and the outlet was a slit, had a number of depressions of 12 times. On the other hand, in Examples 1 to 5, the number of drops was 0 and no drop could be confirmed. In other words, it was shown that the ejection port having the shape of the ejection port forming portion having the narrow portion, the widened portion, and the curved convex portion is particularly excellent in preventing sagging.

In addition, in Examples 1 to 4, in which cut portions and half-cut portions are alternately arranged in the portion constituting the edge of the end portion (curved convex portion), the maximum length of the outlet in the depth direction, that is, The length in the depth direction of the curved convex portion, which is the end portion, is as long as 35 mm, and the range is as much as 30% of the depth direction of the upper surface of the bundle. There were no confirmed cracks at the ends of the

In Example 5, the portion between the cut portions of the curved convex portion in Example 1 is not a half-cut portion, but a conventional general non-cut portion. Some of them were found to have cracks at the ends. In the case of an easy-cleavage line that constitutes the edge of a curved convex portion with a very long length as in the example, if the cut portion and the half-cut portion are arranged alternately, the unsealing operation will be facilitated. It was also confirmed that the strength was increased.

As described above, the package according to the present invention is a film package that is excellent in unsealability because the edge in the width direction of the outlet is difficult to tear when unsealed.

1 Package 2 Sanitary thin paper 2A Folded inside 2B Folded piece 2C Folded edge 2R Root part of sanitary thin paper exposed from outlet 3 Bundle of sanitary thin paper 3A Short Hand side 3B Long side 3C Upper and lower sides of bundle 4 Packaging film 4A Short side 4B Long side 4C Upper side 4D Lower side 4X Overlapping portion of packaging film 5 Outlet Forming portion 5A, 5B Longitudinal end 5T Free piece 6 Extraction port 6E Edge of extraction port 6T Convex piece 6H Recessed portion of extraction port.
41 Front side of packaging film 42 Back side of packaging film 50 Easy tear line 50D, 50D ¹ , 50D ² , 50D ³ Deformed cut portion 50m Main cut portion 50e End cut portion R...curvature of dogleg-shaped portion, 50C...cut portion, 50U...uncut portion (tie portion), 50T...convex cut portion, 50P... edge of outlet forming portion, ^50P1 ...deformed cut portion and non-cut portion Alternating cut portions ^{50P 2} . Narrow width portion 51A: Approximately trapezoidal edge piece 52: Widened portion 53: Curved convex portion ∠α: Taper angle of widened portion ∠β: Open angle of V-shaped portion ∠γ: With respect to the depth direction Angle of direction of convex cut part, ∠Δ: Tip angle of convex cut part.
L1: length in the width direction (longitudinal direction) of the outlet forming portion 5, L2: length in the width direction (longitudinal direction) of the upper surface of the bundle, L3: maximum length in the depth direction (lateral direction) of the outlet forming portion 5 L4... Length of the upper surface of the bundle in the depth direction (transverse direction) L5... Length of the narrow portion in the width direction (longitudinal direction) L6... Length of the narrow portion in the depth direction (transverse direction) , L7 .
L8 Length of the modified cut portion L9 Length of the end cut portion L10 Range from the middle of the widened portion 52A on one side in the depth direction to a position beyond the outer end 53t of the convex portion 53 L11 The length of the uncut section between the deformed cut sections.
L12...height of the convex cut portion, L13...length between base ends of the convex cut portion, L14...length of the non-cut portion between the convex cut portions.
L15: depth of half-cut portion, L16: thickness of packaging film,
105... Outlet forming part, 105A... One end of the outlet forming part, 105B... The other end of the outlet forming part, 105P... Film tear, 150... Perforation, 150e... Perforation at the end in the width direction, X : longitudinal direction (width direction), Y: direction perpendicular to the longitudinal direction (depth direction), Z: thickness direction of the packaging film, C: center of the narrow portion in the depth direction.

Claims (2)

A packaging body in which a bundle of sanitary thin paper is wrapped with a flexible resin packaging film,
Having an outlet forming portion formed by arranging an easy-cleavage line in a ring on the upper surface,
The outlet forming part is
A narrow portion extending in the width direction at the central portion in the depth direction, a widened portion continuously extending from the end of the narrow portion and gradually widening outward in the width direction as the distance from the narrow portion increases, and the widened portion. and a curved convex portion that continuously bulges outward in the width direction,
The length in the width direction is 70% or more of the width of the top surface, the maximum length in the depth direction is 10 to 40% of the length in the depth direction of the top surface, and the length in the width direction of the narrow portion is 50 to 70% of the length of the upper surface, and the length of the narrow portion in the depth direction is 0.5 to 10% of the length of the upper surface in the depth direction.
A package characterized by: 2. The package according to claim 1, wherein the length of the curved projection in the depth direction is 25-45 mm, and the length of the protrusion in the width direction is 2.5-12.5 mm.

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