JP2022154668A5 - - 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. 10(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. 10(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. 10(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 Z, 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
Easy tearing lines in which convex cut portions having a convex shape tapered on the outside in the width direction or continuous convex shapes and non-cut portions connecting the proximal ends of the convex cut portions are arranged alternately. is formed,
This is a packaging body characterized by the following.

The second means is
The convex cut portion has a height of 0.1 mm or more in the package according to the first means.

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,
A convex cut portion in which the edge of at least one curved convex portion of the easy tear line is tapered on the outside in the width direction, or a convex cut portion in which the convex shape is continuous, and a proximal end of the convex cut portion. The package according to the first or second means has portions in which non-cut portions connecting the portions are arranged alternately.

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 the convex cut portions and non-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 length of the outlet forming part in the width direction is 60% 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 in the width direction of the narrow part is 40 to 80% of the length in the width direction of the top surface of the bundle, and the length in the depth direction is 0.5% of the length in the depth direction of the top surface of the bundle. 20%, the package according to the third to fifth means above.

The seventh means is
The packaging body according to the first to sixth means above, wherein the sanitary tissue paper has a higher softness than the packaging film.

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. It is a schematic diagram for demonstrating a convex cut part. 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 B value and 2HB value of pure bending rigidity concerning the present invention. 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 9. 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 with openings formed at both ends in the longitudinal direction with a packaging film 4, and the bundle 3 is wrapped in a cylindrical shape with openings formed at both ends in the longitudinal direction. The part 4X to be attached is bonded at the bottom of the bundle 3 using fusing treatment or adhesive, and the edge of the portion extending beyond the short side surface 3A of the bundle 3 is further welded from above and below 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 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 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 250 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 80 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, the package 1 according to the present invention is a so-called pocket tissue, etc., in which the sanitary thin paper contained therein 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 intended 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). Although the basis weight per ply is not limited, it is preferably 25.0 to 50.0 g/m ² for one-ply sanitary tissue paper, and 12.5 to 25.0 g/m ² for two-ply sanitary tissue paper. The mass per set is preferably 0.8 to 3.0 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, the paper thickness per set of sanitary thin paper is preferably 130 to 285 μm for non-embossed specifications without unevenness called embossing on the surface, and 150 to 600 μm for embossed specifications. 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 100 to 1000 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. Note that the annular shape in this specification is not limited to a circular shape or an elliptical shape, but refers to a shape in which a closed region is formed. Such an outlet forming part 5 is for pulling out the sanitary tissue paper 2 onto 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 6, which is an opening, 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 6, the next sheet immediately below it is pulled out. A portion of the sanitary tissue 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 area 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 60% or more of the length L2 in the width direction of the top surface of the bundle 3, and the maximum length L3 in the depth direction of the entire outlet forming part 5 is 10 to 10% of the length L4 in the depth direction of the top surface of the bundle 3. 40%, the length L5 in the width direction of the narrow part is 40 to 80% 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 40% to 80% of the length L2 in the width direction of the upper surface of the bundle 3. It is desirable that the length is 0.5 to 20% of the length L4 of the top 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, in the package 1 according to the present invention, the length L1 in the width direction and the maximum length L3 in the depth are set to the above-mentioned length L1 in the width direction and the maximum length L3 in the depth in the outlet forming part 5 having the narrow width part 51, the widened part 52 and the curved convex part 53. If it is within the range, at least the B value measured by the KES-FB2-S bending tester of the packaging film 4 at the upper surface 4C portion is 0.085 gf×cm ² /cm or less, and the 2HB value is 0.030 gf× It is desirable that it is less than cm/cm. In addition to being such a packaging film 4, the sanitary tissue paper 2 has a B value of 0.013 to 0.020 gfcm ² /cm measured by a KES-FB2-S bending tester, and a 2HB value of 0. 018 to 0.028 gf×cm/cm is desirable. When the packaging film 4 and the sanitary tissue paper 2 have the above-mentioned combination of rigidities, the packaging film 4 in particular is easy to open when forming the outlet, and the sanitary tissue paper 2 has a firm feel. The B value and 2HB value of the packaging film are the average values obtained by measuring the vertical bending rigidity of the film three times, and the B value and 2HB value of the sanitary tissue paper 2 are the average values of the vertical bending rigidity of the paper 3 times. This is the average value measured twice. The measurement direction of the packaging film and sanitary tissue paper was set as the above-mentioned measurement direction according to the deformation direction of the packaging film and sanitary tissue paper when the sanitary tissue paper was taken out.

When measuring with this KES-FB2-S bending tester, use a sample that has been kept in a constant temperature and humidity room at 23°C and 50% for more than 3 hours, the sample size is 100 mm in width, and the number of measurements is N = 3. , the average value is taken as the measured value. In addition, the measurement conditions shall be as follows.
SENS:4
Environmental temperature: 20±1℃,
Environmental humidity: 60±1%
Bending speed: SET (0.5cm ^-1 /sec)
Curvature: SET (±2.5cm ^-1 )

The B value measured by the KES-FB2-S bending tester is a slope in the range of bending curvature 0.5 to 1.5/-0.5 to -1.5, as shown in Figure 9, and the 2HB is the hysteresis (width) in the range of bending curvature 1.0/−1.0. The B value correlates with the softness and stiffness that humans feel when bending an object; the larger the B value, the stiffer it is, and the smaller the B value, the softer it is. In addition, 2HB correlates with the tactile sensation of recovery (elasticity), which is the force with which a person tries to return an object to its original position after bending it, and the larger the 2HB value (the wider the 2HB width), the less recovery. , the smaller the value of 2HB (the narrower the width of 2HB), the more recoverable it is. Note that this KES-FB2-S bending tester differs from, for example, KES-FB2-A in the bending direction of the sample during measurement.

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 a 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 sealing process 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. In the edge portion 50P of 5B), the easy tear line 50 is formed between a convex cut portion 50T having a convex shape tapered on the outside in the width direction or a continuous convex shape, and the proximal end of this convex cut portion. Non-cut portions 50U connecting the two are arranged alternately. In the shape of the outlet forming portion 5 shown in FIGS. 1 to 5, in particular, 80% or more of the edge of the curved convex portion 53 has a convex shape tapered on the outside in the width direction or a convex shape thereof. The portion 50P includes continuous convex cut portions 50T and non-cut portions 50U arranged alternately. In addition, preferably 85% or more, particularly preferably 90% or more of the curved convex portion 53 is a portion where convex cut portions 50T and non-cut portions 50U are alternately arranged. . The entire range may be composed of easy-to-tear lines in which convex cut portions 50T and non-cut portions 50U are alternately arranged. Further, it is preferable that there is only a convex cut portion 50T having a convex shape tapered on the outside in the width direction. In FIGS. 5 and 6, the edge of the curved convex portion 53 is formed by alternating convex cut portions 50T and non-cut portions 50U connecting the proximal ends of the convex cut portions. Although the form is shown in the figure, the present invention is not limited to this, and as shown in FIG. , and non-cut portions 50U connecting the proximal ends of the convex cut portions may be arranged alternately.

The shape of the convex cut portion 50T is a convex shape tapered on the outside in the width direction, and in addition to the V-shape with one vertex as shown in FIG. It can be formed into a U-shape, as shown in FIG. 6(b), or a trapezoidal shape. In addition, the convex cut portion may have a single convex shape tapered on the outside in the width direction, as shown in FIGS. 5, 6(a), and 6(b), or as shown in FIG. 6(c). Alternatively, a plurality of convex shapes may be connected and continuous at the base end. In this case, the number of consecutive convex shapes is not necessarily limited, but is preferably about 2 to 10. Note that the portion where the convex cut portions and non-cut portions are alternately arranged may include a convex cut portion having only one convex shape and a convex cut portion having a continuous convex shape. Moreover, the expression "the outer side in the width direction is tapered" means that the tip of the convex cut portion 50T is not oriented parallel to the depth direction Y and toward the center in the width direction. Preferably, the tip of the convex cut portion 50T has an angle ∠β with respect to the depth direction Y of 15° or more, preferably 30° or more, and more preferably 45° or more. Further, the opening angle ∠γ of the tip 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°. It is.

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. Convex cut portions 50T and non-cut portions 50U connecting the proximal ends of the convex cut portions are alternately arranged at the end in the width direction (the other end 5B in the illustrated example), which is the part that is most likely to tear. A portion 50P is provided. This outlet forming part 5 is formed at the edge of the other end 5B when an opening operation is performed in which the easy tear line 50 is torn and continuously pulled from one end 5A to the other end 5B. This means that there is a convex cut portion that has already been cut at a position further outside in the width direction than the uncut portion 50U located between the base ends of the convex cut portion 50T in the tensile direction. Even if a minute tear occurs in the packaging film when the non-cut portion 50U between the proximal ends of the convex cut portion 50T tears during such an unsealing operation, immediately after that, the tear occurs in the convex that has already been torn. The tear is prevented from continuing beyond the cut portion 50T. In this way, a portion in which convex cut portions 50T and non-cut portions 50U connecting the proximal ends of the convex cut portions are alternately arranged at the end portion in the width direction (in the illustrated example, the other end portion 5B). By forming 50P, the possibility of cracking is greatly reduced.

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, and the packaging film 4 has a shape that is more likely to be torn during an unsealing operation. However, by providing a portion at the end where convex cut portions 50T and non-cut portions 50U are alternately arranged, the risk of tearing as described above is reduced in each step. This is more 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.

Further, as shown in FIG. 5, a portion 50P is configured by alternately disposing convex cut portions 50T tapered on the outside in the width direction and non-cut portions 50U connecting the proximal ends of the convex cut portions 50T. When the outlet 6 is formed, it becomes a jagged serrated edge with a plurality of protrusions 6T lined up. When pulling out a set of sanitary tissue paper 2 from the bundle 3, these convex pieces 6T are rolled up in the direction of pulling out the sanitary tissue paper, so that the sanitary tissue paper is attached to the edge 6E of the outlet 6, such as the part where the curved convex portion 53 was. It does not prevent it from deforming into a highly erected shape by being rolled up along the . Additionally, sanitary tissue paper can be pulled out smoothly. On the other hand, the root portion 2R of the next set of sanitary thin paper 2, which is partially exposed from the outlet following the taken out sanitary thin paper, functions as a return and contributes to prevention of falling. Furthermore, the edges of the sanitary thin paper 2 in the width direction are sandwiched between the protruding pieces, further increasing the prevention of dropping.

It is desirable that the height L8 from the proximal end side to the distal end of the convex cut portion 50T is 0.1 mm or more. Although the upper limit is not necessarily limited, it is desirable that the upper limit does not exceed 10 mm. The height of the convex cut portion is preferably 0.5 to 7 mm, more preferably 1 to 5 mm. A convex cut portion having a low height of less than 1.0 mm is also called a microwave cut or the like and can be formed by a technique. The convex cut portion 50T having such a low height is formed by a portion in which convex cut portions 50T and non-cut portions 50U that connect the proximal ends of the convex cut portions are arranged alternately. The unevenness of the serrated edge of the outlet 6 has an inconspicuous design. Note that the height of the convex cut portion where convex shapes are continuous is the height of the lowest convex portion.

Although the length L9 between both ends of the convex cut portion 50T and the length L11 of the uncut portion 50U between the base ends of adjacent convex cut portions 50T are 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 or more and 1. The range is preferably 3 mm or less. Within this range, unintentional tearing will not occur and continuous tearing will likely proceed smoothly.

In addition, in the easy tear line 50 constituting the edge of the outlet forming part 5, the portion where the convex cut parts 50T and the non-cut parts 50U are arranged alternately may be located at both ends of the outlet forming part 5. It may also be present 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 53C. 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.

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.

Further, in the package 1, it is desirable that the packaging film 4 has a softness smaller than that of the sanitary tissue paper 2. If the softness of the packaging film is smaller than the softness of the sanitary tissue paper 2, the serrated edges formed by the juxtaposed convex cut portions and non-cut portions, particularly the plurality of convex pieces 6T, may cause the sanitary tissue paper 2 to be drawn out. The paper can be easily deformed so that it can be turned over in the drawing direction, and the paper can be pulled out smoothly with little resistance, and there is less paper dust generated due to friction.

In the easy tearing line 50 constituting the outlet forming part 5 according to the present invention, the cut part 50C and the non-cut part are other than the part 50P where the convex cut part 50T and the non-cut part 50U are arranged alternately. It can be a slit cut with perforations in which 50 U are alternately arranged, an uncut portion (non-cut portion), or the like. However, it is not limited to this.

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 zipper perforations in which the cut portion is Y- shaped , approximately L-shaped, or <-shaped. 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.

Note that the uncut portion 50U of the simple tearing line 50 according to the present invention is partially or entirely faced to the bundle 3 from the surface side, which is the surface that does not face the bundle 3, in the thickness direction of the packaging film 4. Although it is not completely cut all the way to the back surface side, which is the side that is to be removed, it may be a half-cut portion that is cut to a predetermined depth range in the thickness direction. By making the non-cut portion 50U into a half-cut portion with a cut, the force required to tear the packaging film 4 is reduced, and the tearing of the easy tear line 50 is facilitated to proceed smoothly and continuously. The end portion of the outlet forming portion 5, particularly the uncut portion 50U that connects the proximal end portions of the convex cut portions 50T located at the curved convex portions may be a half-cut portion. Unintentional tearing when opening the package is less likely to occur. Although the depth of the cut in the half-cut portion is not limited, it is preferably 20% or more and 80% or less of the thickness of the packaging film.

Furthermore, in the shape having the narrow portion 51, widened portion 52, and curved convex portion 53 as shown in FIGS. 1 to 5, the edge portion of the narrow portion 51 extends from one end 5A to the other end 5B. Since the pulling direction during the unsealing operation and the extending direction match, it is desirable that the non-cut portion be configured with perforations that are not half-cut portions. The edge of the narrow portion 51 is less likely to tear unintentionally.

The cut tie ratio in the slit cut having perforations and non-cut portions other than the portion 50P where the convex cut portions 50T and non-cut portions 50U are alternately arranged is determined as appropriate depending on the ease of breakage of the film used. The length of the cut part is 0.8 mm or more and 20.0 mm or less, and the length of the uncut part (tie part or uncut part) is 0.3 mm or more and 5.0 mm or less. It is advisable to design it appropriately from the range of .

Note that the easy tear line 50 can be cut once by die-cutting, including the portion where the convex cut portions 50T and the non-cut portions 50U are alternately arranged, in a slit cut having a perforation and a non-cut portion. can be formed.

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 100 sets of 1-ply paper towels (Elleair Sukiri Obi 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, it can be seen that in Examples 1 to 4, in which the portion constituting the edge of the end portion (curved convex portion) is alternately arranged with convex cut portions and non-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, which covers 30% of the depth of the top surface of the bundle, making it easy to tear. There was no evidence of tearing at the end of the outlet.

In Comparative Example 1, the convex cut part of the curved convex part in Example 1 was made into a conventionally common straight cut part, and was configured with normal perforations. A tear occurred at the end of the outlet. 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. It can be said that tearing of the end of the outlet during the unsealing operation can be further prevented by providing the opening.

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, 6T... Convex piece, 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, 50T...Convex 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, ∠β... angle of orientation of convex cut part with respect to depth direction, ∠γ... convex cut part tip angle.
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 length in the depth direction (shorter direction) of the outlet forming part 5 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...Length of bulge in the width direction of the curved convex part, L8...Height of the convex cut part, L9...Length between the proximal ends of the convex cut part, L10...From the middle of the widened part 52A on one side in the depth direction Range up to a position beyond the outer end 53t of the convex portion 53, L11... Length of the uncut portion between the convex cut portions.
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
Easy tearing lines in which convex cut portions having a convex shape tapered on the outside in the width direction or continuous convex shapes and non-cut portions connecting the proximal ends of the convex cut portions are arranged alternately. is formed,
A packaging body characterized by: The package according to claim 1, wherein the convex cut portion has a height of 0.1 mm or more. 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,
A convex cut portion in which the edge of at least one curved convex portion of the easy tear line is tapered on the outside in the width direction, or a convex cut portion in which the convex shape is continuous, and a proximal end of the convex cut portion. The package according to claim 1 or 2, having portions in which non-cut portions connecting the portions are arranged alternately. 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 the convex cut portions and non-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 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. The package according to any one of claims 3 to 5, wherein the content is 10%. The package according to any one of claims 1 to 6, wherein the sanitary tissue paper has a higher softness than the packaging film.