JP2022154667A5 - - Google Patents

Description

The present invention relates to a package in which a bundle of sanitary tissue paper such as paper towels is folded and stacked and wrapped in a flexible packaging film.

As a packaging form for sanitary tissue paper such as paper towels and facial tissues, one or more plies are folded and stacked, forming a so-called pop-up bundle in which when the top sheet is pinched and pulled out, part of the next sheet is pulled out. It is known that packaging is carried out using a flexible packaging film made of resin.

In the past, such sanitary tissue paper packaging generally had a simple linear perforation for forming the outlet, and a slit-shaped outlet was formed on the top surface. . However, if the slit-shaped outlet has a long slit length, there is a problem that the sheets will fall into the interior when the number of sheets remaining inside is small, and if the slit length is shortened, There was a problem in that it was difficult to pull out a single sheet out of the film, and the pull-out resistance became too high at the beginning or end of use, so that when the sheet was pulled out, the packaging film was lifted up, making it impossible to pop it up.

Therefore, in order to improve the problem of this slit-shaped outlet, perforations for forming the outlet are arranged in an elongated annular shape extending in the longitudinal direction using die-cutting techniques such as die-cutting, and a substantially elliptical outlet is formed. It is practiced to have a width in the depth direction as shown in (see Patent Documents 1 and 2 below). Furthermore, in recent years, in order to further improve the ease of ejection, the ejection opening has been formed into a roughly gourd-like shape with the ends widened in the width direction.

However, conventional approximately oval-shaped or approximately gourd-shaped outlets place emphasis on softness and suppleness, and are similar to facial tissue paper, which is mainly used for facial purposes such as chewing sake or wiping around the mouth during meals. It is designed primarily for use as sanitary tissue paper, and is designed to be used for cleaning skin other than the face, as well as for cleaning items. It was not necessarily suitable for sanitary thin paper such as paper towels, which are more rigid than tissue paper and are mainly used for wiping hands after washing.

In order to improve the ease of taking out sanitary tissue paper, it may be possible to make the outlet wider in the depth direction, but sanitary tissue paper with high rigidity is different from facial tissue paper, which has excellent softness and flexibility due to the difference in paper quality. It is difficult to design the same way, and simply making the ejection port wider in the depth direction will cause problems such as pop-up failures where the next sanitary tissue paper does not pull up when it pops up and falls down, and failures where the next sanitary tissue paper falls down instead of standing up on the top surface of the package. It is more likely to occur.

On the other hand, for example, in an outlet forming part 105 formed by annularly arranging perforations 150 using a die-cutting technique such as a die-cutting technique, such as the approximately elliptical outlet forming part shown in FIG. 9(b), there is an advantage that the outlet can be easily formed by cutting off the annular perforation area 105Z from one end 105A to the other end 105B in the longitudinal direction X. 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 where it is finally cut off is the direction in which the annular perforation inner range 105Z is pulled. As shown in FIG. 9(c), the perforations 150 tear smoothly and continuously at this end, especially in the vicinity of the perforations 150e at the end of 105B. If this is not done, an unintended tear 105P may occur at the end of the outlet 106, as shown in FIG. 9(d). In the outlet forming part 105 formed by arranging the perforations 150 in an annular shape, as the end portion in the width direction is widened in the depth direction Y , the range of the perforations becomes closer to the direction perpendicular to the cutting and peeling direction. Because it is longer, this tearing is more likely to occur. Therefore, tearing 105P is more likely to occur in a generally gourd-shaped outlet forming portion with widened ends.

Further, 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 part 105, such tearing 105P is more likely to occur. Particularly in packaging bodies in the form of pillow packaging or gusset packaging, such tearing is likely to occur because the stretching direction of the packaging film is generally perpendicular to the longitudinal direction of the outlet forming part.

Japanese Patent Application Publication No. 2018-052559 Japanese Patent Application Publication No. 2018-058654

In view of the above-mentioned problems, the main object of the present invention is to have excellent unsealability because the edges in the width direction of the outlet are difficult to tear when unpacking, and to improve the ease of pulling out sanitary tissue paper, especially hard sanitary tissue paper such as paper towels. An object of the present invention is to provide an excellent film packaging package.

The means for solving the above problems are as follows.
The first means is
A packaging body in which a bundle of sanitary tissue paper is wrapped in a flexible resin packaging film,
It has an outlet forming part formed by arranging easy tear lines in a ring shape on the upper surface,
The edge of at least one end in the width direction of the outlet forming part is constituted by an easy-to-tear line in which cut parts and half-cut parts are arranged alternately.
This is a packaging body characterized by the following.

The second means is
The half-cut portion is a package according to the first means, in which the half-cut portion is cut to a depth of 20% or more of the thickness of the packaging film.

The third means is
The outlet forming part includes a narrow part extending in the width direction at the central part in the depth direction, and a widening part that continues from the end of the narrow part and gradually widens outward in the width direction as the distance from the narrow part increases. and a curved convex portion that bulges outward in the width direction continuously from the widened portion,
The packaging according to the first or second means, wherein the portion constituting the edge of at least one curved convex portion of the easy tear line has a portion where cut portions and half cut portions are alternately arranged. It is the body.

The fourth means is
In the package according to the third means, 80% or more of the portion constituting the edge of the curved convex portion is a portion where cut portions and half-cut portions are alternately arranged.

The fifth means is
A package according to the third means, wherein the length of the curved convex portion in the depth direction is 25 to 45 mm, and the bulge length in the width direction is 2.5 to 12.5 mm.

The sixth means is
The easy tearing line has a part where cut parts and half cut parts are arranged alternately. This is a package according to the third means above, having a portion that includes:

The seventh means is
The length of the outlet forming part in the width direction is 70% or more of the length in the width direction of the top surface of the bundle, and the maximum length in the depth direction is 10 to 40% of the length in the depth direction of the top surface of the bundle. The length of the narrow part in the width direction is 50 to 70% of the length of the top surface of the bundle in the width direction, and the length in the depth direction is 0.5% of the length of the top surface of the bundle in the depth direction. This is a package according to the third to sixth means above, in which the oxidation rate is 10%.

According to the present invention, there is provided a film-packaged package which has excellent unsealability because the widthwise edge of the outlet is difficult to tear when opening the package, and which also has excellent ease of pulling out sanitary tissue paper, especially hard sanitary tissue paper such as paper towels. Ru.

It is a perspective view for explaining the package concerning the present invention. It is a perspective view for explaining a tissue paper bundle. FIG. 3 is a top view for explaining the outlet forming part. FIG. 2 is a perspective view for explaining how the package according to the present invention is used. FIG. 3 is a partially enlarged view for explaining an outlet forming part. FIG. 3 is a schematic diagram for explaining a half-cut portion. FIG. 7 is a diagram for explaining another example of the outlet forming part. FIG. 7 is a diagram for explaining another example of the shape of the outlet forming part. It is a figure for explaining the conventional outlet formation part.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 8. Note that the directions such as the vertical direction and the horizontal direction in the present invention and this specification are changed depending on the orientation of the package, and do not mean absolute directions in space. In addition, rigidity is sometimes referred to as the firmness, stiffness, or stiffness of paper.

A package 1 according to the present invention is a bundle 3 in the shape of a substantially rectangular parallelepiped made by folding sanitary tissue paper 2 such as paper towels, wrapped in a flexible packaging film 4, and has an outlet forming part 5 on the upper surface 4C. have. This package 1 has an upper surface 4C, a lower surface 4D facing the upper surface 4C, and a long side 4B and a short side 4A located between the upper surface 4C and the lower surface 4D so as to approximate the shape of the bundle 3. It has an approximately hexahedral shape.

1 to 4 illustrate embodiments of gusset packaging. This gusset packaging is pillow packaging with a gusset, in which a bundle 3 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 wrapping is overlapped in the wrapping direction. The part 4X to be attached is bonded by fusion processing or adhesive at the bottom of the bundle 3, and further, the edge of the part extending beyond the short side surface 3A of the bundle 3 is fused from the top and bottom while forming a gusset. The short side surface 4A is used as a sealing surface by adhering with an adhesive or an adhesive. In this gusset packaging, the sealing surface, which is the short side 4A, faces the short side 3A of the bundle 3, and the long side 4B, which is the gusset, faces the long side 3B, which is the folded surface of the bundle 3. However, in the present invention, the packaging form of the package 1 is not limited. It may be a simple pillow packaging without a gusset, or other appropriate packaging forms such as overlap packaging, also called caramel packaging, in which the short side 4A is constructed by overlapping and fusing flaps as shown in Fig. 7. It can be done.

The bundle 3 of sanitary tissue paper 2 contained in the package 1 according to the present invention is a so-called pop-up type bundle. In particular, as shown in FIG. 2, this bundle 3 is made by folding rectangular sanitary tissue paper 2 in half, and placing the folded pieces 2B of other sanitary tissue papers 2 above and below on the folded inner side 2A. A plurality of sanitary thin papers 2 are folded and stacked, and each sanitary thin paper 2 has a pair of longitudinal sides 3B where the folded edges 2C are lined up, a pair of short side sides 3A where the folded edges 2C are not lined up, and a pair of short side sides 3A where the folded edges 2C are not lined up. It has a substantially rectangular parallelepiped shape having a pair of planes (upper and lower surfaces) 3C that are connected to the longitudinal side surface 3A and the longitudinal side surface 3B.

The number of sets of sanitary tissue paper 2 constituting the bundle 3 is not limited, but can be 30 to 240 sets, with one ply or multiple plies being one set. The size of the bundle 3 is also not limited, but it is preferably a bundle of 200 sets of sanitary thin paper, with a height of 30 to 100 mm x longitudinal direction (width) of 150 to 250 mm x transversal direction (depth) of 100 to 130 mm. . Moreover, the effect of improving pop-up defects of the present invention is further enhanced when the height of the bundle is shorter than the length of the top surface of the bundle in the depth direction.

The filling rate of the bundle 3 in the package 1 is not limited as long as it does not impede the effects of the present invention, but it is desirable that the gap between the bundle and the packaging film is in the range of 0 to 30 mm. The bundle 3 may be packaged in a slightly compressed state in the vertical direction with a packaging film. In addition, in the package 1 according to the present invention, the sanitary thin paper contained therein, which is called a so-called pocket tissue, 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 expected to be taken out.

Each sanitary thin paper 2 constituting the bundle 3 has a single-layer structure with one sheet or a laminated structure with a plurality of sheets stacked one on top of the other. Although the number of plies is not limited, it is desirable to use one ply (1 ply) or two plies (2 ply). The basis weight per ply is not limited, but is preferably 13 to 40 g/m ² . The mass per set is preferably 1.0 to 2.5 g. A sanitary thin paper made of one or two plies of sheets having the above basis weight is particularly suitable for paper towels suitable for wiping hands after washing. Further, it is desirable that the thickness of each set of sanitary thin paper is 100 to 500 μm. The sanitary tissue paper with such number of plies, basis weight, and paper thickness has the structure of the present invention, especially the shape of the characteristic outlet forming part having a narrow part, wide part, and curved convex part, so that the sanitary tissue paper has the following sanitary properties at the time of pop-up. It is highly effective in improving pop-up defects, where the tissue paper does not pull up and falls down, and upright defects, where the tissue paper does not stand up on the top surface of the package but falls down.

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

Further, the sanitary thin paper 2 according to the present invention is a dry type paper, and is not a so-called wet type paper impregnated with a chemical solution. Therefore, the bundle 3 formed of the sanitary tissue paper 2 contains a large amount of air. Even in this dry type sanitary thin paper 2, there is a chemical liquid-applied type in which a chemical liquid such as a moisturizing ingredient that increases moisture through moisture absorption such as polyol such as glycerin is applied. Good too.

The raw material pulp constituting the sanitary thin paper 2 is not limited. Examples include a blend of pulp derived from softwood such as NBKP and pulp derived from hardwood such as LBKP. Moreover, waste paper pulp may be blended, or it may consist only of waste paper pulp. In the present invention, in order to achieve particularly excellent effects in sanitary thin paper with strong stiffness and high rigidity such as paper towels, it is particularly preferable that the content of pulp is more than 50% derived from coniferous trees.

The dry tensile strength of the sanitary thin paper 2 is not limited, but those having a dry tensile strength of 1000 to 3000 cN/25 mm in the longitudinal direction and 250 to 1500 cN/25 mm in the transverse direction are particularly suitable for the present invention. The dry tensile strength is measured in accordance with JIS P8113 (1998). Examples of the measuring device include "Universal Tension Compression Tester TG-200N" manufactured by Minebea Co., Ltd. and its equivalent.

The outlet forming part 5 is formed by arranging easy tear lines 50 in a ring shape on the upper surface 4C of the bundle 3 of packaging films 4 facing the top sanitary thin paper 2. This outlet forming part 5 is an opening for pulling out the sanitary tissue paper 2 on the upper surface 4C of the package 1 by tearing the easy tear line 50 and separating and removing the area surrounded by the easy tear line 50. An outlet port 6 is formed. In the package 1 according to the present invention, since the bundle 3 is of a pop-up type, when one sanitary tissue paper 2 at the top of the bundle 3 is pulled out from the formed outlet, the next sanitary tissue paper located immediately below it A portion of the thin paper becomes exposed from the outlet. In addition, since this outlet forming part 5 has the easy tear line 50 arranged in a ring shape, the outlet 6 formed by separating and removing the area surrounded by the easy tear line 50 has only a straight line. Rather than having a slit shape, it has a certain width in the depth direction. Such an outlet forming part 5 can be formed by continuously pulling and peeling off the area surrounded by the easy tear line 50 from one end 5A toward the other end 5B. Excellent operability when opening the package as it can separate and remove films within the range of . Note that in this specification, the end located on the left side in the drawing will be described as one end 5A, and the end located on the right side will be referred to as the other end 5B, but this is only defined for convenience of explanation. These can be interchanged.

The package 1 shown in FIGS. 1 to 5 has an outlet forming portion 5 having a generally gourd-like shape, which is a particularly preferable shape. The outlet forming portion 5 includes a narrow width portion 51 extending in the width direction at the central portion of the upper surface 4C in the depth direction, and a narrow width portion 51 extending outward in the width direction of the bundle 3 continuously from the end of the narrow width portion 51. It has a widened portion 52 that gradually becomes wider as it moves away from the narrowed portion 51, and a curved convex portion 53 that bulges outward in the width direction of the bundle 3 following the widened portion 52.

It is particularly desirable that the widened portion 52 is arranged such that the angle of the easy tear line 50 gradually increases toward the outside in the width direction of the bundle 3 with respect to the width direction . It is desirable that the easy tear 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, from the widened portion 52 to the curved convex portion 53, it is desirable that the easy tear line 50 is formed in a curved line and smoothly connected. When the easy tearability 50 is arranged in this manner, the easy tear line 50 is easily torn smoothly 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 part 5 has a substantially trapezoidal shape in which the vicinity of the edge extending from the narrow part 51 to the widened part 52 is easily movable in the vertical direction. Since the edge piece 51A is free, when pulling out a set of sanitary tissue paper 2 from the bundle 3, as shown in FIG. Then, the next exposed set of sanitary tissue paper 2 is bent over and supported. Further, the outlet 6 formed by the outlet forming part 5 is arranged such that the base portion 2R of the next sanitary tissue paper following the sanitary tissue paper pulled out from the bundle 3, which is partially exposed from the outlet 6, is located at the edge of the curved convex portion 53. It deforms so as to be wound along 6E, and becomes easily deformed into a highly erectable columnar shape. Furthermore, since the space between the widened part 52 and the curved convex part 53 of the outlet forming part 5 becomes a recessed part 6H when the outlet 6 is formed, the root of the next sanitary tissue paper that is partially exposed from the outlet 6. By fitting the portion 2R into the recess 6H, the uprightness is also improved. In particular, in the outlet forming portion 5, the above-mentioned effect makes it difficult to cause pop-up failures due to depressions inside the packaging film of the sanitary tissue paper, which are likely to occur when the sanitary tissue paper has high rigidity. Note that this effect is particularly effective in combination with sanitary tissue paper having the above-mentioned suitable basis weight and paper thickness, and further with a suitable packaging film described below. However, the outlet forming part 5 according to the present invention may have a shape without the widened part 52, as shown in FIG. Further, the outlet forming portion 5 may have a linear easy-to-tear line connected to the annularly arranged easy-to-tear line as long as it does not impede the effects of the present invention.

Moreover, in the shape of the outlet forming part 5 having the narrow width part 51, the widened part 52, and the curved convex part 53 as shown in FIGS. The length L1 is 70% or more of the length L2 of the top surface of the bundle 3 in the width direction , and the maximum length L3 of the entire outlet forming part 5 in the depth direction is 10 to 10% of the length L4 of the top surface of the bundle 3 in the depth direction. 40%, the length L5 in the width direction of the narrow part is 50 to 70% of the length L2 in the width direction of the upper surface of the bundle 3, and the length L6 in the depth direction of the narrow part is 50 to 70% of the length L2 in the width direction of the upper surface of the bundle 3. It is desirable that it is 0.5 to 10% of the length L4 of the upper surface in the depth direction. The shape of the outlet forming portion 5 is such that a curved convex portion 53 is formed which is particularly wide in the depth direction. In addition, the free edge piece 51A formed near the edge of the narrow part 51 becomes wider and larger, and the space between the narrow parts 51 can be widened when pulled out. Therefore, when drawing out the sanitary thin paper 2 from the bundle 3, it can be taken out smoothly. In particular, packaging forms such as gusset packaging and pillow packaging in which a clear fold line is difficult to form at the boundary between the short side 4A and the top surface 4C, and the packaging film at the top surface of the package 1 is easily deformed, Even if the sanitary tissue paper 2 to be used is a highly rigid sanitary tissue 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 easily deformed when the sanitary tissue paper 2 is pulled out, The entire upper surface is easily maintained flat without being distorted, and when taking out the sanitary tissue paper 2 one by one, it becomes particularly stable and easy to take out. Moreover, since the free substantially trapezoidal edge piece 51A formed near the edge of the narrow part 51 becomes wider and larger, and the deep recessed part 6H is formed, the sanitary thin paper 2 with high rigidity Since the edge piece is firmly supported and also supports the root portion 2R of the sanitary tissue paper 2, it is effectively prevented from falling. In addition, since the length of the edge of the curved convex portion 53 becomes longer, the sanitary tissue paper 2 is wound gently along the edge of the curved convex portion 53, but the sanitary tissue paper 2 with high rigidity does not bend easily. This makes it easier to stand upright.

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

On the other hand, specific examples of the flexible resin packaging film 4 constituting the exterior of the package 1 include polyethylene film, polypropylene film, polyester film, polyethylene terephthalate film, nylon film, vinylidene chloride film, and ethylene vinyl alcohol. Examples include a single layer film of a copolymer, a laminate film containing these films laminated as appropriate, and a gas barrier film obtained by subjecting these films to surface treatment such as aluminum vapor deposition. Furthermore, 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.

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

Furthermore, if fragrant items such as fragrant tissue paper are to be packaged, ethylene vinyl alcohol copolymer resin films and polyethylene terephthalate resin films, which have excellent fragrance retention properties, are desirable. Even if it is a multi-layered resin film that has enhanced thermal adhesion by laminating a polyethylene resin film or a polypropylene resin film on one or both sides of an ethylene vinyl alcohol copolymer resin film or a polyethylene terephthalate resin film. good.

Here, as particularly shown in FIGS. 5 and 6, the outlet forming part 5 according to the present invention is characterized by at least one end (in the illustrated example, the other end) in the width direction of the outlet forming part 5. The edge portion 50P of 5B) is configured such that the easily tearable line 50 has cut portions 50C and half cut portions 50H arranged alternately. In particular, in the shape of the outlet forming portion 5 shown in FIGS. 1 to 5, over 80% of the edge of the curved convex portion 53 is formed by alternating cut portions 50C and half-cut portions 50H. The other part is 50 pages. In addition, preferably 90% or more, particularly preferably 95% or more of the curved convex portion 53 is a portion where cut portions 50C and half-cut portions 50H are alternately arranged. The entire range may be composed of easily tearable 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 arranged so that the cut portion 50C cuts the bundle in the thickness direction Z of the packaging film 4, as shown in a plan view in FIG. The half-cut portion 50H is a part that is completely cut from the front side 41, which is the side that does not face the bundle 3, to the back side 42, which is the side that faces the bundle 3. This is a portion cut into a predetermined depth range L8 in the thickness direction Z from the front side 41 to the back side 42. In this way, the portion where the cut portions 50C and the half-cut portions 50H are arranged alternately has a higher tear line than the portion where the cut portions 50C and the uncut portions 50U having no cuts are arranged alternately. When tearing, it becomes easier for the tearing to proceed smoothly and continuously. 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 tends to proceed continuously and smoothly from 50C to half-cut portion 50H, and from half-cut portion 50H to 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 that is continuous with the curved convex portion 53 having a portion in which cut portions 50C and half-cut portions 50H are alternately arranged. It is also desirable to have a portion in which cut portions 50C and half-cut portions 50H are alternately arranged. In particular, it is preferable that 80% or more of the edge of the widened portion 52 be a portion where cut portions 50C and half-cut portions 50H are alternately arranged. Preferably, a range of 90% or more, particularly preferably 95% or more, is a portion where cut portions 50C and half-cut portions 50H are alternately arranged. The entire range may be composed of easily tearable lines in which cut portions 50C and half cut portions 50H are alternately arranged.

Here, it is desirable that the half-cut portion 50H is cut to a depth of 20% or more of the thickness L9 of the packaging film. If the cut is 20% or more, it is possible to sufficiently generate a continuous and smooth tear between the cut portion 50C and the half-cut portion 50H when forming a take-out port by the unsealing operation. The upper limit of the depth of the cut is not limited, but if it is set to 80% or less, more preferably 60% or less, unintended tearing becomes difficult to occur.

The outlet forming part 5 according to the present invention is finally torn in a general opening operation in which the seal is continuously pulled from one end 5A to the other end 5B in the range surrounded by the easy tear line 50. A portion where cut portions 50C and half-cut portions 50H are alternately arranged is located at the end in the width direction (the other end 5B in the illustrated example), which is the portion that is most likely to tear. Therefore, even if the opening operation of continuously pulling from one end 5A toward the other end 5B is performed, there is little risk that the packaging film 4 will be unintentionally torn at the other end 5B, which is torn off last. In particular, a roughly gourd-shaped shape having a narrow part 51, a wide part 52, and a curved convex part 53 as shown in FIGS. 1 to 5, which are excellent in pulling out paper towels etc. with high rigidity, and more particularly a preferable numerical range mentioned above. In this case, the range of the easy-to-tear line forming the edge of the curved convex portion 53 is long and is arranged along the depth direction, so that the pulling direction and the easy-to-tear line when opening the package are The angle of intersection with the direction is large, resulting in a shape where the packaging film 4 is likely to tear during an unsealing operation. However, by providing a portion in which cut portions 50C and half-cut portions 50H are alternately arranged at the end portion, the possibility of occurrence of tearing is significantly reduced. This is particularly effective in packaging forms where tearing is likely to occur, such as pillow packaging or gusset packaging, in which the stretching direction of the packaging film 4 is perpendicular to the longitudinal direction of the outlet forming portion 5.

In addition, in the easy tear line 50 constituting the edge of the outlet forming part, the portion where the cut part 50C and the half cut part 50H are arranged alternately may be located at both ends of the outlet forming part 5, Alternatively, it may be provided only at one end. If the opposite end is formed only on one side, for example, as shown in FIG. The range L10 up to the exceeding position can be made into a continuous cut portion . In this way, as shown in FIG. 8(b), a free piece 5T is formed at one end 5A of the outlet forming part 5 in a range including the outer end from one depth side, and the free piece 5T This makes the opening operation easier.

The length ratio of the cut portion 50C and the half cut portion 50H at the end of the outlet forming portion 5 is not necessarily limited, but the length of the cut portion 50C is 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 is preferably 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, continuous 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 is unlikely to occur.

Here, the thickness L9 of the packaging film 4 may be selected as appropriate, but preferably the thickness is 25 to 75 μm as measured in accordance with JIS P 8118 (1998). If the thickness is 25 to 75 μm, the effects of the present invention can be particularly effectively exhibited. Thickness L9 was determined by thoroughly conditioning the measurement sample under the conditions of JIS P 8111 (1998), and then using a dial thickness gauge (thickness measuring instrument) "PEACOCK G-1A model" (manufactured by Ozaki Seisakusho Co., Ltd.) or an equivalent device. Measure using.

In the easy tear line 50 constituting the outlet forming part 5 according to the present invention, the parts other than the part where the cut part 50C and the half cut part 50H are arranged alternately are perforations, uncut parts (uncut parts), etc. It can be a slit cut or the like with a section). 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, microperforations in which the cut portion is a hole, and perforations in which the cut portion has a Y- shape , approximately L-shape, or <-shape. Preferably, it is a normal perforation. A slit cut is a portion where a film is cut into a slit shape, and by having non-cut portions, the non-cut portions and cut portions are arranged alternately. Note that a slit cut having a non-cut portion may be simply referred to as a slit cut. Although a slit cut having a perforation and a non-cut portion may not be distinguished, in the present invention, a slit cut is defined as a slit cut when the cut portion is less than 2 pitches, that is, when the cut portion of the same length is not repeated twice. It's called a cut. Generally, a slit cut is formed so that the length of the cut portion is longer than the perforation.

In the shape having the narrow part 51, the widened part 52, and the curved convex part 53 as shown in FIGS. Since the direction of tension and the direction of extension are the same, it is desirable to construct the perforation with an uncut part rather than a half-cut part. This is desirable because it makes it difficult for the edges of the narrow portion 51 to tear unintentionally.

The cut tie ratio for slit cuts with perforations and non-cut parts is determined at appropriate intervals depending on the ease of breakage of the film used, but the length of the cut part should be 0.8 mm or more and 20.0 mm or less, and non-cut parts. The length of the cut portion (tie portion or uncut portion) may be appropriately designed within the range of 0.3 mm or more and 5.0 mm or less.

In addition, the easy tear line 50 can be formed once by die-cutting, for example, a slit cut having a perforation and a non-cut part, including a part where cut parts 50C and half-cut parts 50H are alternately arranged. can do.

Next, Examples 1 to 4 of the present invention and Comparative Examples 1 to 2 were prepared, and tests were conducted on the fall of the sanitary tissue paper and the tearing of the opening. The shape of the outlet forming part of the packaging body according to Examples 1 to 4 and Comparative Example 1 is approximately a gourd-shaped shape having a narrow part, a wide part, and a curved convex part as shown in FIGS. 1 to 5. . The outlet forming portion of the package according to Comparative Example 2 was simply a linear perforation.

The bundle contained in the package according to each example consists of 200 sets of 1-ply paper towels (Elleair Sukiri Obutu Towel manufactured by Daio Paper Co., Ltd.) with a basis weight of 35.5 g/m ² and a paper thickness of 255 μm, folded and stacked in a pop-up style. It is something that Moreover, the packaging form according to each example is gusset packaging, and the stretching direction of the packaging film is perpendicular to the width direction of the outlet forming part.

In the test for the number of drops, the easy tearing line related to the outlet forming part is torn open to form an outlet, and the paper towels constituting the bundle are sequentially pulled out from the outlet until the last one. , we counted the number of times the drop actually occurred.

"Unsealability" refers to whether or not a tear occurs at the other end of the outlet when a test subject opens the sample by pinching one end and pulling it toward the other end. We decided to evaluate. Assuming N=10, cases in which tearing occurred were evaluated as "present," and cases in which tearing did not occur were evaluated as "absent."

The dimensions of the outlet forming part, the ratio of the top 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 are shown in Table 1 below.

From Table 1, in Examples 1 to 4, in which the edge of the end portion (curved convex portion) is made up of alternating cut portions and half-cut portions, the maximum length in the depth direction of the outlet In other words, the length of the curved protrusion at the end is as long as 35 mm in the depth direction, which covers 30% of the depth of the top surface of the bundle, making it easy to tear. No cracks were observed at the end of the outlet.

In Comparative Example 1, the part between the cut parts of the curved convex part in Example 1 is not a half-cut part, but a conventionally common non-cut part. Tears occurred at the edges. Even if it is an easily tearable line that constitutes the edge of a very long curved convex part as in the embodiment, by making the part alternately cut parts and half-cut parts. It was shown that tearing at the end of the outlet was prevented during the opening operation.

Therefore, for example, if there is another narrow outlet shape that does not have a widened part as shown in FIG. By doing so, it can be said that tearing of the end of the outlet during the opening operation can be further prevented.

In addition, regarding the drop-off, in Comparative Example 2 in which the outlet forming part was a single perforation and the outlet was a slit, 12 drops were confirmed. On the other hand, in Examples 1 to 4 and Comparative Example 1, the number of dips was 0, and no dips were observed. In other words, it has been shown that the outlet formed by the shape of the outlet forming part having the narrow portion, the widened portion, and the curved convex portion is particularly excellent in preventing collapse.

From the above, the package according to the present invention has excellent unsealability because the edges in the width direction of the outlet are difficult to tear when opened, and also has excellent ease of pulling out sanitary tissue paper, especially hard sanitary tissue paper such as paper towels. It is packaged in film packaging.

1... Packaging body, 2... Sanitary tissue paper, 2A... Folded inside, 2B... Folded piece, 2C... Folded edge, 2R... Root portion of sanitary tissue paper exposed from outlet, 3... Bunch of sanitary tissue paper, 3A... Short Hand side, 3B...longitudinal side, 3C...upper and lower surfaces of the bundle, 4...packaging film, 4A...short side, 4B...long side, 4C...top surface, 4D...bottom surface, 4X...overlapping portion of packaging film, 5...outlet Forming portion, 5A, 5B... Longitudinal end, 5T... Free piece, 6... Outlet, 6E... Edge of outlet, 6H ... Recessed part of outlet.
41...Front side of the packaging film, 42...Back side of the packaging film,
50...Easy tearing line, 50C...Cut part, 50H...Half cut part, 50U...Uncut part (tie part), 50P...Part where cut part and half cut part are arranged alternately, 51...Narrow width part , 51A... substantially trapezoidal edge piece, 52... widened part, 53... curved convex part, ∠α... taper angle of widened part.
L1... Length in the width direction (longitudinal direction) of the outlet forming part 5, L2... Length in the width direction (longitudinal direction) of the top surface of the bundle, L3... Maximum depth direction (shorter direction) of the outlet forming part 5 Length, L4... Length in the depth direction (short direction) of the top surface of the bundle, L5... Length in the width direction (longitudinal direction) of the narrow width part, L6... Length in the depth direction (short direction) of the narrow width part L7...Protrusion length in the width direction of the curved convex part, L8...Depth of the half-cut part, L9...Thickness of the packaging film, L10...From the middle of the widened part on one side in the depth direction to the outside of the curved convex part Range beyond the side edge .
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.

Claims (7)

A packaging body in which a bundle of sanitary tissue paper is wrapped in a flexible resin packaging film,
It has an outlet forming part formed by arranging easy tear lines in a ring shape on the upper surface,
The edge of at least one end in the width direction of the outlet forming part is constituted by an easy-to-tear line in which cut parts and half-cut parts are arranged alternately.
A packaging body characterized by: 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 part includes a narrow part extending in the width direction at the central part in the depth direction, and a widening part that continues from the end of the narrow part and gradually widens outward in the width direction as the distance from the narrow part increases. and a curved convex portion that bulges outward in the width direction continuously from the widened portion,
The package according to claim 1 or 2, wherein the portion constituting the edge of at least one curved convex portion of the easy tear 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 constituting the edge of the curved convex portion is a portion where cut portions and half-cut portions are alternately arranged. 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 bulge length in the width direction is 2.5 to 12.5 mm. The easy tearing line has a part where cut parts and half cut parts are arranged alternately. 4. The package according to claim 3, having a portion comprising: The length of the outlet forming part in the width direction is 70% or more of the length in the width direction of the top surface of the bundle, and the maximum length in the depth direction is 10 to 40% of the length in the depth direction of the top surface of the bundle. The length of the narrow part in the width direction is 50 to 70% of the length of the top surface of the bundle in the width direction, and the length in the depth direction is 0.5% of the length of the top surface of the bundle in the depth direction. 7. The package according to any one of claims 3 to 6, wherein the content is 10%.