JP2022154667A - package - Google Patents

Abstract

To provide a package of film packaging excellent in openability.SOLUTION: A package is obtained by packaging a sanitary tissue paper bundle with a soft resin packaging film. The package includes a take-out port formation part formed by arranging an easy-to-cut opening line in a ring shape on an upper surface. At least one end edge of the take-out port formation part in a width direction is formed of the easy-to-cut opening line in which a cut part and a half cut part are arranged alternately.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 the outlet has a substantially elliptical shape. It has been practiced to have a width in the depth direction as shown in Patent Documents 1 and 2 below. Furthermore, in recent years, in order to further improve the ease of taking out, the outlet has been made into a substantially 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 way as , and if the depth direction of the outlet is simply widened, the pop-up failure in which the next sanitary thin paper does not pull up when it pops up, and the rise failure in which the package falls down instead of standing up on the top surface of the package. It becomes easy to occur in.

On the other hand, for example, like the substantially elliptical outlet forming portion shown in FIG. As shown in 9(b), there is an advantage that an extraction port can be easily formed by cutting off the annular perforated area 105Z from one end 105A in the longitudinal direction X toward the other end 105B. However, when such an unsealing operation is performed, the direction in which the perforation 150 is torn as it approaches the perforation 150e at the other end, which is cut off last at the other end 105B, is the direction in which the annular perforation inner area 105Z is pulled. Therefore, as shown in FIG. 9(c), tearing of the perforation 150 is smooth and continuous at this end, particularly in the vicinity of the perforation 150e at the end of 105B. As shown in FIG. 9(d), an unintended tear 105P may occur at the end of the outlet 106. As shown in FIG. In the outlet forming portion 105 formed by annularly arranging the perforations 150, as the end portion in the width direction is widened in the depth direction Z, the range of the perforations becomes closer to the direction perpendicular to the cutting and peeling direction. Being longer, this tearing is more likely to occur. Therefore, a substantially gourd-shaped outlet forming portion with widened ends is likely to cause a tear 105P.

Furthermore, especially when the packaging film is a uniaxially stretched film stretched 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, in pillow packaging and gusset packaging, the stretching direction of the packaging film is generally perpendicular to the longitudinal direction of the outlet forming portion, so such tearing is likely to occur.

JP 2018-052559 A JP 2018-058654 A

Therefore, in view of the above-mentioned problems, the main object of the present invention is to improve the opening property by preventing the widthwise edge of the outlet from being torn when unsealed, and to improve the drawing property of sanitary thin paper, especially hard sanitary thin paper such as paper towels. To provide an excellent packaging body for film packaging.

Means for solving the above problems are as follows.
The first means is
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 edge of at least one end in the width direction of the outlet forming portion is composed of an easy-cleavage line in which cut portions and half-cut portions are alternately arranged,
A package characterized by:

The second means is
The half-cut part is the packaging body according to the first means, wherein the packaging film is cut to a depth of 20% or more of the thickness of the packaging film.

A third way is
The outlet forming portion includes a narrow portion extending in the width direction at the central portion in the depth direction, and a widened portion continuously extending from the end portion of the narrow portion toward the outside in the width direction and gradually widening as it separates from the narrow portion. and a curved convex portion that is continuous with the widened portion and bulges outward in the width direction,
The packaging according to the first or second means, wherein the portion forming the edge of the curved convex portion of at least one of the easy-cleavage lines has a portion in which cut portions and half-cut portions are alternately arranged. is the body.

A fourth means is
The package according to the third means, wherein 80% or more of the portion forming 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 third means, wherein the length of the curved protrusion in the depth direction is 25 to 45 mm, and the length of the protrusion in the width direction is 2.5 to 12.5 mm.

A sixth means is
In the easy-cleavage line, the portion constituting the edge of the widened portion continuous with the curved convex portion having the portion where the cut portion and the half-cut portion are alternately arranged is arranged such that the cut portion and the half-cut portion are arranged alternately. It is a package according to the third means, which has a portion that

The seventh measure is
The outlet forming portion has a length in the width direction of 70% or more of the width of the upper surface of the bundle, a maximum length in the depth direction of 10 to 40% of the length of the upper surface of the bundle in the depth direction, and is narrow. The length of the bundle in the width direction of the part is 50 to 70% of the length of the upper surface of the bundle, and the length in the depth direction is 0.5 to 10% of the length of the upper surface of the bundle in the depth direction. It is a package according to the third to sixth means.

ADVANTAGE OF THE INVENTION According to the present invention, there is provided a film packaging package which is excellent in unsealability because the edge in the width direction of the outlet is difficult to tear when unsealed, and which is excellent in pulling out sanitary thin paper, particularly hard sanitary thin paper such as paper towels. be.

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. It is a schematic diagram for demonstrating a half cut part. It is a figure for demonstrating the other example of an outlet formation part. It is a figure for demonstrating another example of a shape of an outlet formation part. It is a figure for demonstrating the conventional outlet formation part.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 8. FIG. 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. This gusset packaging is a 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 bundles are overlapped in the winding direction. The portion 4X to be connected is fused or adhered with an adhesive at the bottom of the bundle 3 or the like, and the edge of the portion extending beyond the short side 3A of the bundle 3 is fused or bonded from above and below while forming a gusset. The short side 4A is used as a sealing surface by bonding with 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, and other suitable packaging forms such as overlap packaging, also called caramel packaging, in which short sides 4A are overlapped and fused together as shown in FIG. can be

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. In addition, the package 1 according to the present invention is a so-called pocket tissue or the like, and the sanitary thin paper enclosed is tissue paper, and the number of sets is about 10 to 12 and the height is about 10 mm. It is not something that is not assumed to be taken out.

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 desirable to be 13 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 can be hygienically processed at the time of pop-up due to the configuration of the present invention, particularly the shape of the characteristic outlet forming portion having a narrow width portion, a widened portion, and a curved convex portion. 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 is formed by annularly arranging an easy tearing line 50 at the upper surface position 4C facing the uppermost sanitary thin paper 2 of the bundle 3 of the packaging film 4 . The outlet forming part 5 is formed by tearing the easy-cleavage line 50 and separating and removing the range surrounded by the easy-cleavage line 50, thereby forming an opening for pulling out the sanitary thin paper 2 on the upper surface 4C of the package 1. An outlet 6, which is a part, 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.

The package 1 of the form shown in FIGS. 1 to 5 has a substantially gourd-shaped outlet forming portion 5, which is a particularly preferred shape. The outlet forming portion 5 includes a narrow portion 51 extending in the width direction at the central portion in the depth direction of the upper surface 4C, and an end portion of the narrow portion 51 extending outward in the width direction of the bundle 3. It has a widened portion 52 that gradually widens with increasing distance from the narrowed portion 51 and a curved convex portion 53 that is continuous with the widened portion 52 and bulges outward in the width direction of the bundle 3 .

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. The easy-cleavage line 50 forming the edge of the widened portion 52 preferably has a taper angle ∠α of 25 to 60 degrees with respect to the width direction.

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

In the embodiment shown in FIGS. 1 to 5, the outlet 6 formed by the outlet forming portion 5 has a generally trapezoidal shape in which the vicinity of the edge extending from the narrow portion 51 to the widened portion 52 is easily movable in the vertical direction. Therefore, as shown in FIG. 4, when a set of sanitary thin paper sheets 2 is pulled out from the stack 3, the edge strips 51A are deformed so as to be slightly rolled up in the direction in which they are pulled out. , the next exposed set of sanitary thin paper 2 is leaned against and supported. In addition, the outlet 6 formed by the outlet forming portion 5 is such that the base 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 formed by the edge of the curved convex portion 53. It deforms so as to be wound along 6E, and easily deforms into a highly upright columnar shape. Furthermore, since the recessed portion 6H is formed between the widened portion 52 and the curved convex portion 53 of the outlet forming portion 5 when the outlet 6 is formed, the base of the next sanitary thin paper partly exposed from the outlet 6 is formed. By fitting the portion 2R into the recessed portion 6H, the erectability is enhanced. In particular, in the outlet forming portion 5, 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 rigidity of the sanitary thin paper is high, is less likely to occur. 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. However, the outlet forming portion 5 according to the present invention may have a shape that does not have the widened portion 52 as shown in FIG. In addition, the outlet-forming portion 5 may have a linear easy-cleavage line connected to the ring-shaped easy-cleavage line within a range that does not interfere with the effects of the present invention.

Moreover, in the shape of the outlet forming portion 5 having the narrow portion 51, the widened portion 52, and the curved convex portion 53 as shown in FIGS. The length L1 is 70% or more of the width L2 of the upper surface of the bundle 3, the maximum length L3 in the depth direction of the entire outlet forming portion 5 is 10 to 40% of the length L4 in the depth direction of the bundle 3, and the width The length L5 in the width direction of the narrow portion is 50 to 70% of the length L2 of the upper surface of the bundle 3, and the length L6 in the depth direction is 0.5 of the length L3 in the depth direction of the upper surface of the bundle 3. ~10% is preferred. Such a shape of the outlet forming portion 5 is such that a curved convex portion 53 that is wide especially in the depth direction is formed. In addition, the free edge piece 51A formed near the edge of the narrow portion 51 becomes wider and larger, so that the space between the narrow portions 51 can be widened when pulled out. Therefore, when the sanitary thin paper 2 is pulled out from the bundle 3, it can be taken out smoothly. In particular, it is difficult to form a clear folding line at the boundary between the short side 4A and the upper surface 4C, such as gusset packaging and pillow packaging, and the packaging film at the upper surface position of the package 1 is easily deformed. Even if the sanitary thin paper 2 to be used 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 likely to be deformed when the sanitary thin paper 2 is pulled out, when the sanitary thin paper 2 is pulled out The entire upper surface is less likely to be distorted and is easily maintained flat, and when the sanitary thin paper 2 is to be taken out one by one, it is particularly stable and easy to take out. In addition, the substantially trapezoidal free edge piece 51A formed near the edge of the narrow portion 51 is wider and larger, and the deep recessed portion 6H is formed. Since the edge piece can be firmly supported and the base portion 2R of the sanitary thin paper 2 is supported, it is effectively prevented from falling. In addition, since the length of the edge of the curved convex portion 53 is increased, the sanitary thin paper 2 is gently wound along the edge of the curved convex portion 53. As a result, it becomes more orthostatic.

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 which 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, as particularly shown in FIGS. 5 and 6, the outlet forming portion 5 according to the present invention is characterized by at least one end portion (in the illustrated example, the other end portion) in the width direction of the outlet forming portion 5. 5B), the edge portion 50P of the easy-cleavage line 50 is configured by alternately arranging cut portions 50C and half-cut portions 50H. In the shape of the outlet forming portion 5 shown in FIGS. 1 to 5, the cut portions 50C and the half-cut portions 50H are alternately arranged in a range of 80% or more of the portion constituting the edge of the curved convex portion 53. The portion is 50P. In addition, preferably 90% or more, particularly preferably 95% or more, of the curved convex portion 53 is a portion where the cut portions 50C and the half-cut portions 50H are alternately arranged. The entire range may be composed of easy-cleavage lines 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 L8 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 split line than the portion where the cut portions 50C and the uncut portions 50U without any cuts are alternately arranged. At the time of cleaving, the cleaving tends to progress continuously and smoothly. This is because the difference in force required to tear the packaging film 4 is smaller between the cut portion 50C and the half-cut portion 50H than between the cut portion 50C and the uncut 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.

In particular, in the shape of the outlet forming portion 5 shown in FIGS. 1 to 5, the edge of the widened portion 52 continuing to the curved convex portion 53 having the portion where the cut portion 50C and the half-cut portion 50H are alternately arranged It is also desirable that the portion constituting .theta. In particular, it is preferable that 80% or more of the portion constituting the edge of the widened portion 52 is a portion in which the cut portions 50C and the half-cut portions 50H are alternately arranged. Preferably, 90% or more, particularly preferably 95% or more, is a portion in which the cut portions 50C and the half-cut portions 50H are alternately arranged. The entire range may be composed of easy-cleavage lines in which cut portions 50C and half-cut portions 50H are alternately arranged.

Here, the half-cut portion 50H is preferably cut to a depth of 20% or more of the thickness L9 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 outlet-forming portion 5 according to the present invention is finally cleaved in a general unsealing operation 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. A portion where the cut portion 50C and the half-cut portion 50H are alternately arranged is located at the end portion in the width direction (the other end portion 5B in the illustrated example), which is the portion that is most likely to tear. Therefore, even if the unsealing operation is performed by continuously pulling from the one end 5A toward the other end 5B, there is little possibility that the packaging film 4 will unintentionally tear at the other end 5B that is cut off last. In particular, a substantially gourd-shaped shape having a narrow portion 51, a widened portion 52, and a curved convex portion 53 as shown in FIGS. In the present invention, the range of the easy-cleavage line forming the edge portion of the curved convex portion 53 is long and is arranged along the depth direction. The crossing angle with the direction is large, and the shape is such that the packaging film 4 is likely to be torn during the unsealing operation. However, by providing a portion in which the cut portions 50C and the half-cut portions 50H are alternately arranged at the end portion, the risk of tearing is greatly reduced. This is particularly effective in packaging forms such as pillow packaging and gusset packaging, in which the stretching direction of the packaging film 4 is perpendicular to the longitudinal direction of the outlet forming portion 5 and tearing is likely to occur.

In addition, in the easy-cleavage line 50 forming the edge of the outlet-forming portion, the portions where the cut portions 50C and the half-cut portions 50H are alternately arranged may be at both end portions of the outlet-forming portion 5. Alternatively, it may be present only at one end. If it is formed only on one side, the opposite end is, for example, as shown in FIG. A range L10 up to the crossing position can be a continuous cut portion 53C. In this way, as shown in FIG. 8(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.

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.

Here, the thickness L9 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. The thickness L9 is obtained by sufficiently adjusting the humidity of the measurement sample under the conditions of JIS P 8111 (1998), and then using a dial thickness gauge (thickness measuring instrument) "PEACOCK G-1A type" (manufactured by Ozaki Seisakusho Co., Ltd.) and its equivalent. Measure using

In the easy tear line 50 constituting the outlet forming portion 5 according to the present invention, the portions other than the portion where the cut portions 50C and the half-cut portions 50H are alternately arranged are perforations, uncut portions (non-cut It can be a slit cut or the like provided with a part). However, it is not limited to this. The cut portion 50C and the half-cut portion 50H may be arranged alternately.

If perforations are used, the type is not limited. Examples include normal perforations in which the cut portion 50C is a straight line, micro perforations in which the cut portion is a hole, and perforations in which the shape of the cut portion is Y-shaped, substantially L-shaped, or <-shaped. Preferred are normal perforations. 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.

In the shape having the narrow portion 51, the widened portion 52, and the curved convex portion 53 as shown in FIGS. Since the direction of tension and the direction of extension are the same, it is desirable to configure perforations having uncut portions instead of half-cut portions. This is desirable because it makes it difficult for the edge of the narrow portion 51 to unintentionally tear.

The cut tie ratio in a 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.

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 4 and Comparative Examples 1 and 2 of the present invention were produced, 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 4 and Comparative Example 1 is a substantially gourd shape having a narrow portion, a wide portion, and a curved convex portion shown in FIGS. 1 to 5. . The outlet forming portion of the package according to Comparative Example 2 is a simple linear perforation.

200 sets of 1-ply paper towels (Elleair Refreshing Hand Towels manufactured by Daio Paper Co., Ltd.) having a basis weight of 35.5 g/m ² and a paper thickness of 255 μm are folded and piled up in a pop-up manner. It is a thing. 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, in Examples 1 to 4, in which the cut portion and the half-cut portion were alternately arranged in the portion constituting the edge of the end portion (curved convex portion), the maximum length in the depth direction of the outlet was In other words, 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, making it easy to tear. There was no confirmed tear at the edge of the outlet.

In Comparative Example 1, the portion between the cut portions of the curved convex portion in Example 1 was not a half-cut portion but a conventional non-cut portion. Edge tearing occurred. Even with an easy-cleavage line that forms the edge of a very long curved convex portion as in the example, by alternately arranging a cut portion and a half-cut portion for that portion. , which was shown to prevent tearing at the edge of the outlet during the opening operation.

Therefore, for example, in the case of another narrow outlet shape that does not have a widened portion as shown in FIG. It can be said that by arranging it, the edge of the outlet is prevented from tearing during the opening operation.

In addition, as for the depression, the number of depressions was confirmed to be 12 in Comparative Example 2 in which the outlet forming portion was a single perforation and the outlet was a slit. On the other hand, in Examples 1 to 4 and Comparative Example 1, 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.

From the above, the package according to the present invention has excellent opening properties because the edge in the width direction of the outlet is difficult to tear when opened, and is also excellent in drawing out sanitary thin paper, especially hard sanitary thin paper such as paper towels. It is a packaging body of film packaging.

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 portions 5A, 5B Longitudinal ends 5T Free piece 6 Outlet 6E Edge of outlet 6E Recessed part of outlet.
41... Front side of packaging film, 42... Back side of packaging film,
50... Easy tear line, 50C... Cut part, 50H... Half cut part, 50U... Uncut part (tie part), 50P... Part where cut part and half cut part are alternately arranged, 51... Narrow width part , 51A... substantially trapezoidal edge piece, 52... widened portion, 53... curved convex portion, ∠α... taper angle of the widened portion.
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 . A range up to a position exceeding the side edge 53t.
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 orthogonal to the longitudinal direction (depth direction), Z ... thickness direction of the packaging film.

Claims (7)

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 edge of at least one end in the width direction of the outlet forming portion is composed of an easy-cleavage line in which cut portions and half-cut portions are alternately arranged,
A package characterized by: 2. 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 outlet forming portion includes a narrow portion extending in the width direction at the central portion in the depth direction, and a widened portion continuously extending from the end portion of the narrow portion toward the outside in the width direction and gradually widening as it separates from the narrow portion. and a curved convex portion that is continuous with the widened portion and bulges outward in the width direction,
3. The package according to claim 1, wherein the portion forming the edge of at least one of the curved protrusions of the easy-cleavage line has a portion in which cut portions and half-cut portions are alternately arranged. 4. The package according to claim 3, wherein 80% or more of the portion forming the edge of the curved convex portion is a portion in which cut portions and half-cut portions are alternately arranged. 4. The package according to claim 3, wherein the length of the curved convex portion in the depth direction is 25 to 45 mm, and the length of the protrusion in the width direction is 2.5 to 12.5 mm. In the easy-cleavage line, the portion constituting the edge of the widened portion continuous with the curved convex portion having the portion where the cut portion and the half-cut portion are alternately arranged is arranged such that the cut portion and the half-cut portion are arranged alternately. 4. The package of claim 3, having a portion that The outlet forming portion has a length in the width direction of 70% or more of the width of the upper surface of the bundle, a maximum length in the depth direction of 10 to 40% of the length of the upper surface of the bundle in the depth direction, and is narrow. The length in the width direction of the part is 50 to 70% of the length of the upper surface of the bundle, and the length in the depth direction is 0.5 to 10% of the length in the depth direction of the upper surface of the bundle. Item 6. The package according to any one of items 3 to 6.

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