JP2022101007A - Package - Google Patents

Abstract

To provide a package capable of being easily opened, while exhibiting durability during conveyance.SOLUTION: A package 1 comprises a plurality of absorbent articles 2; and a packaging bag 3 comprising an upper face part 10, a front face part 11, a rear face part 12, a right face part 13 and a left face part 14, that stores the plurality of absorbent articles 2 and includes a vertical direction T. The packaging bag 3 comprises first weakened lines 21 with tear strength of 4 N or less provided in an opening planned area 7 between an outer edge of a supporting planned area 6 at the upper face part 10 and an end edge on an upper side of the plurality of absorbent articles 2 in the vertical direction T. Tensile strength with respect to tensile force in the vertical direction of the first weakened line is 3.5 N/25 mm/kg.SELECTED DRAWING: Figure 1

Description

The present invention relates to a package of an absorbent article.

A package in which a plurality of absorbent articles such as a urine absorbing pad are stored in a packaging bag is known. The packaging bag has a perforated line on the outside. The user tears the packaging bag starting from the weakening line and takes out the absorbent article inside from the packaging bag.

For example, Patent Document 1 discloses a package in which a disposable diaper or the like is stored in a packaging bag. The packaging bag is provided with a sealing line in which both sides of a tubular plastic sheet are folded and sealed. The seal line is provided with a handle. This packaging bag has a break line (weak line) that is almost parallel to the bottom surface of the packaging bag in the section from the upper surface of the packaged object to be filled and accommodated below the seal line of the upper opening to the vicinity thereof. It is attached. For example, when break lines are continuously provided over the entire circumference of the packaging bag, or break lines are independently provided at the same height at the corners of the packaging bag, and are slightly lower than those break lines. Further break lines may be provided at the positions on the front surface, both side surfaces, and the back surface, respectively. In the following description, the breaking line of Patent Document 1 is also referred to as a weakening line.

Japanese Unexamined Patent Publication No. 2001-301859

Since the packaging bag is torn from the weakening line at the time of opening, it is preferable that the portion where the weakening line is formed can be easily torn in order to improve the opening property.

On the other hand, the package must be durable enough to hold the absorbent article inside during transportation. The weakening line of the packaging bag of Patent Document 1 is located on the line of action of the force generated by the absorbent article stored in the packaging bag with respect to the handle portion. Therefore, the force acting on the handle portion during transportation, that is, when the handle portion is gripped and the package is lifted, also acts on the portion where the weakening line is formed. If the force acting on the handle exceeds the strength of the part where the weakening line is formed, the packaging bag will be unintentionally torn from the weakening line, making it difficult to carry the absorbent article. There's a problem.

An object of the present invention is to provide a package that can be easily opened while having durability during transportation.

The package of one aspect of the present invention is as follows.
A packaging body comprising a plurality of absorbent articles and a packaging bag containing the plurality of absorbent articles, including a vertical direction, and having an upper surface portion, a front surface portion, a rear surface portion, a right surface portion, and a left surface portion. The packaging bag has a first weakening tear strength of 4 N or less in the planned opening area between the outer edge of the upper surface portion to be gripped and the upper edge of the plurality of absorbent articles in the vertical direction. A package having a wire and having a tensile strength with respect to the vertical tensile force of the first weakening wire of 3.5 N / 25 mm / kg.

According to the present invention, it is possible to provide a package that can be easily opened while having durability during transportation.

It is a perspective view which shows typically the structural example of the package | body which concerns on embodiment. It is a front view and the right side view which schematically show the structural example of the package body which concerns on embodiment. It is a top view which shows typically the packaging bag of the packaging body which concerns on embodiment. It is a figure used for the explanation of an Example, and is a schematic diagram which shows the sample of a tear test. It is a figure which is used for the explanation of an Example, and is the schematic diagram which shows the tear tester. It is a figure which is used for the explanation of an Example, and is the schematic diagram which shows the tensile tester. It is a schematic diagram which shows the structural example of the 1st weakening line and the 2nd weakening line of the package which concerns on embodiment. It is a schematic diagram which shows an example of the manufacturing method of the package | body which concerns on embodiment. It is a schematic diagram which shows the mode of opening the package | package which concerns on embodiment completely or partially. It is a front view which shows typically the structural example of the package which concerns on the modification of embodiment. It is a figure which is used for the explanation of an Example, and is the schematic diagram which shows the drop tester.

The present embodiment relates to the following aspects.
[Aspect 1]
A packaging body comprising a plurality of absorbent articles and a packaging bag containing the plurality of absorbent articles, including a vertical direction, and having an upper surface portion, a front surface portion, a rear surface portion, a right surface portion, and a left surface portion. The packaging bag has a first weakening tear strength of 4 N or less in the planned opening area between the outer edge of the upper surface portion to be gripped and the upper edge of the plurality of absorbent articles in the vertical direction. A package having a wire and having a tensile strength of 3.5 N / 25 mm / kg or more with respect to the vertical tensile force of the first weakening wire.
The package has a first weakening line having a tear strength of 4N or less in the planned opening area between the outer edge of the planned gripping area and the upper edge of the plurality of absorbent articles in the vertical direction. Since the first weakening line can be easily torn when the tear strength is 4N or less, it can be a starting point when opening the package. Therefore, the package can be easily opened.
Since the first weakening line is provided in the planned opening area between the outer edge of the planned gripping area and the upper edge of the plurality of absorbent articles in the vertical direction, the first weakening line is gripped by the absorbent articles stored in the packaging bag. It is located on the line of action of the force generated on the packaging bag in the planned area to be gripped when the packaging bag in the planned area is gripped. Then, at the time of transportation, that is, when the packaging bag in the planned gripping area is gripped and the package is lifted, the force acting on the packaging bag in the scheduled gripping area also acts on the first weakening line. When transporting, the tensile strength A with respect to the vertical tensile force of the first weakening line and the total weight B of the plurality of absorbent articles have a relationship of A / B ≧ 3.5 (N / 25 mm / kg). In addition, it is possible to prevent the packaging bag from being torn from the first weakening line by the force acting on the packaging bag. Therefore, it can be said that the package has durability during transportation.
From the above, the package can be easily opened while having durability during transportation.

[Aspect 2]
The first weakening line is provided in the end region of the planned opening area in the direction intersecting the vertical direction, and the second weakening line is provided in the central region of the planned opening area in the direction intersecting the vertical direction. The first weakening line and the second weakening line each include a plurality of notch holes formed at intervals in the row direction, and the first weakening line and the second weakening line respectively. The package according to aspect 1, wherein at least one of the lengths of the plurality of cut holes in the row direction and the lengths of the intervals in the row direction are different.
The force acting on the packaging bag in the planned opening area varies depending on the position in the planned opening area and the actual gripping position in the planned gripping area. Depending on the position in the planned opening area, at least one of the lengths of the first weakening line and the second weakening line in the row direction of the plurality of cut holes and the lengths of the intervals in the row direction as appropriate. By changing, the package can more reliably adjust its durability during transportation and its ease of opening.

[Aspect 3]
The package according to aspect 2, wherein the length of the plurality of cut holes of the first weakening line in the row direction is equal to or less than the length of the interval of the first weakening line in the row direction.
In the first weakening line, the length of the notch holes in the row direction is equal to or less than the length of the gap in the row direction, that is, the distance between adjacent notch holes, thereby suppressing deformation of the notch holes due to a pulling force in the vertical direction. can do. Therefore, it is possible to prevent the adjacent notch holes from being connected due to the deformation of the notch holes during transportation, that is, to prevent the packaging bag from being torn starting from the first weakening line. Therefore, the package can prevent the packaging bag from being torn during transportation.

[Aspect 4]
The package according to aspect 2 or 3, wherein the adjacent first weakening line and the second weakening line are separated from each other in the planned opening area.
Since the adjacent first weakening line and the second weakening line are separated from each other, the force acting when the packaging bag in the planned gripping area is gripped is dispersed in the first weakening line and the second weakening line, respectively. do. Then, it is possible to prevent the adjacent first weakening line and the second weakening line from affecting each other, that is, the first weakening line and the second weakening line are chained and torn. Therefore, the package can prevent the packaging bag from being torn during transportation.

[Aspect 5]
The packaging bag has a corner portion in the planned opening area, and the corner portion includes a portion where the front surface portion and the right surface portion intersect, a portion where the front surface portion and the left surface portion intersect, and the rear surface portion. Each of the portion where the right surface portion intersects and the portion where the rear surface portion and the left surface portion intersect, and the first weakening line is provided so as to straddle at least one top of the corner portion, and the first weakening line is provided. 1. In the corner portion provided with the weakening line, the distance from the top portion of the corner portion to the end portion of the first weakening line is shorter than the length of the interval in the column direction, any one of aspects 2 to 4. The package described in the section.
Since the package is provided with a first weakening line so as to straddle at least one top of the corner, the packaging bag can be easily torn by sandwiching the corner with fingers and tearing the packaging bag starting from the first weakening line. Can be opened. Further, since the distance from the top to the end of the first weakening line at the corner is shorter than the length in the column direction of the spacing, that is, the spacing between adjacent notch holes, the packaging bag starts from the first weakening line. Can be torn more easily.

[Aspect 6]
The packaging bag has a corner portion in the planned opening area, and the corner portion includes a portion where the front surface portion and the right surface portion intersect, a portion where the front surface portion and the left surface portion intersect, and the rear surface portion. Each of the portion where the right surface portion intersects and the portion where the rear surface portion and the left surface portion intersect, and the corner portion is between the right surface portion and the left surface portion between the front surface portion and the rear surface portion, respectively. The first weakening line is provided so as to straddle at least one top of the corner portion, which is formed by being folded in a valley fold inside the packaging bag in the direction intersecting the vertical direction in the above. The second weakening line is provided on the front surface portion and the rear surface portion, and the length of the cut hole of the first weakening line in the row direction is the length of the cut hole of the second weakening line in the row direction. The ratio of the length of the notch hole in the row direction to the length of the first weakening line spacing in the row direction is the notch hole longer than that or the ratio of the length of the notch hole in the row direction to the length of the second weakening line spacing in the row direction. The package according to any one of aspects 2 to 5, which is larger than the ratio of lengths in the column direction.
The corners are formed by folding the right side and the left side into a valley fold inward in the direction of crossing in the vertical direction between the front part and the front part, respectively, so that the corners can be easily fingered. Can be sandwiched between. Therefore, the packaging bag can be opened more easily by sandwiching the corner portion with a finger and tearing the packaging bag starting from the first weakening line. Further, a second weakening line is provided in a wide range of the front surface portion and the rear surface portion, and the length of the cut hole of the first weakening line in the row direction is longer than the length of the cut hole of the second weakening line in the row direction. Or, the ratio of the length of the notch hole in the column direction to the length of the interval of the first weakening line in the row direction is the ratio of the length of the notch hole to the length of the interval of the second weakening line in the column direction. Since it is larger than the ratio of lengths in the row direction, it is possible to prevent the second weakening line from being torn during transportation.

[Aspect 7]
The package according to aspect 5 or 6, wherein in the corner portion provided with the first weakening line, the first weakening line overlaps in the vertical direction on both sides of the top portion.
At the corner where the first weakening line is provided, the first weakening line overlaps in the vertical direction on both sides of the top. Since the force when tearing the package is not dispersed by pinching the corners with fingers, the package bag can be torn more easily, and as a result, the package can be easily opened.

[Aspect 8]
The package according to any one of aspects 2 to 7, wherein the first weakening line is formed below the center in the vertical direction in the planned opening area.
Since the first weakening line is formed below the center in the vertical direction in the planned opening area, the force acting from the packaging bag in the planned gripping area to the first weakening line is dispersed through the packaging bag in the planned opening area. do. Therefore, since the force acting on the first weakening wire becomes small, it is possible to prevent the first weakening wire from being torn during transportation.

[Aspect 9]
The package according to any one of aspects 2 to 7, wherein the first weakening line is formed above the center in the vertical direction in the planned opening area.
Since the first weakening line is formed above the center in the vertical direction in the planned opening area, it does not overlap with the position of the absorbent article stored in the packaging bag. Therefore, even if the package is inflated with an absorbent article, it can be easily opened by sandwiching the package bag in the planned opening area with fingers and tearing the package bag starting from the first weakening line. can.

[Aspect 10]
The package according to any one of aspects 2 to 9, wherein the tensile strength of the first weakening line and the second weakening line with respect to the vertical tensile force is smaller than the piercing strength of the packaging bag.
Since the tensile strength of the first weakening line and the second weakening line with respect to the vertical pulling force is smaller than the piercing strength of the packaging bag, the first weakening line and the second weakening line are not so much as to make a hole in the surface of the package by the finger pressed at the time of opening. The 1st weakening line and the 2nd weakening line are preferentially torn. Therefore, the package can be opened more easily because the packaging bag can be appropriately torn along the first weakening line and the second weakening line.

[Aspect 11]
The package according to any one of aspects 2 to 10, wherein the packaging bag is made of a film having a thickness of 40 μm or more and 80 μm or less.
The packaging bag has a predetermined strength because it is made of a film having a thickness of 40 μm or more and 80 μm or less. Then, the package can more reliably prevent the surface of the package from being unintentionally torn by the pressed finger. Therefore, the package can further improve the durability during transportation.

[Aspect 12]
The package according to any one of aspects 2 to 11, wherein the total weight of the plurality of absorbent articles is 800 g or more and 3500 g or less.
The packaging bag can be a package having a total weight of 800 g or more and 3500 g or less of the plurality of absorbent articles by providing durability during transportation.

[Aspect 13]
The package according to any one of aspects 2 to 12, wherein the plurality of absorbent articles are folded in half and the folds are arranged on the upper side in the vertical direction.
Absorbent articles generally have a longitudinal direction and include an absorber approximately in the center of the longitudinal direction. The absorber contains water-absorbent fibers and highly absorbent polymer particles and has a high density. Therefore, when the absorbent article is folded in half at the center in the longitudinal direction, the center of gravity is located near the crease. Therefore, by folding the absorbent article in half and arranging the folds in the packaging bag on the upper side in the vertical direction, the position of the center of gravity of the package becomes higher in the vertical direction. Then, the moment of the package centered on the upper surface portion becomes smaller as the position of the center of gravity is higher. Therefore, during transportation, the force acting on the first weakening line when the package is shaken can be suppressed, and when the package collides with an obstacle or the like, the impact on the first weakening line is smaller. can do. Therefore, the package can prevent the first weakening line from being torn during transportation.

[Aspect 14]
The packaging body according to any one of aspects 2 to 13, wherein the packaging bag has a handle portion in the gripping area.
By having the handle portion in the planned gripping area of the packaging bag, the gripping position is determined, so that the force acting on the first weakening line is stable. That is, it is possible to prevent an excessive force from unintentionally acting on the first weakening line. Therefore, the package can prevent the first weakening line from being torn during transportation.

[Aspect 15]
The packaging bag has a high-rigidity portion, the high-rigidity portion is formed by embossing, and the vertical position is between the handle portion and the first weakening line, and the upper surface portion thereof. The package according to aspect 14, which extends over the entire area in the direction of crossing in the vertical direction.
Since the packaging bag has a high-rigidity portion, the force acting on the handle portion is distributed over the entire area of the upper surface portion in the vertical direction intersecting through the high-rigidity portion. That is, by absorbing the force acting on the handle portion in a wider range of the upper surface portion, the force acting on the first weakening line can be reduced, so that the first weakening line can be prevented from being torn during transportation. can.

[Aspect 16]
The packaging bag further has a joint portion that connects the upper end portion of the front surface portion and the rear surface portion, and the handle portion is provided at the joint portion, and the handle portion has the joint portion thickened. The packaging according to aspect 14 or 15, which has an opening formed by cutting in the isth order, wherein the opening has a curved handbag.
Since the opening of the carrying portion is curved, it is possible to prevent stress from being concentrated on a part of the carrying portion due to the weight of the plurality of absorbent articles stored in the packaging bag. That is, it is possible to prevent the handle portion from being torn and damaged from a part of the hand-carrying portion where stress is concentrated. Then, even when the packaging bag is formed by using the sheet member having low strength from the viewpoint of improving the openability, the durability of the handle portion can be maintained. Therefore, the package can be durable during transportation.

[Aspect 17]
The package according to any one of aspects 14 to 16, wherein the handle portion is provided with a reinforcing film.
The strength of the handle portion can be improved by providing the reinforcing film. Then, even when the packaging bag is formed by using the sheet member having low strength from the viewpoint of improving the openability, the durability of the handle portion can be maintained. Therefore, the package can be durable during transportation.

Hereinafter, the packaging body according to the embodiment will be described. However, in the present specification, "along" in a certain direction includes the direction in the range of ± 30 ° with respect to the direction. Further, the end portion of a member or the like in a certain direction is a length of 1/5 (preferably 1/10) or less of the total length of the member or the like in the direction from the edge of the member in the direction. The range of the length.

As shown in FIGS. 1 and 2, the package 1 includes a plurality of absorbent articles 2 and a packaging bag 3 for storing the plurality of absorbent articles 2. The absorbent article 2 is, for example, a disposable diaper such as a pants-type diaper and a tape-type diaper, and is not shown, but is arranged between a liquid-permeable top sheet, a liquid-impermeable back sheet, and a top sheet and a back sheet. Including the absorbed material. The absorbent article 2 has a longitudinal direction and is partitioned in the longitudinal direction into three regions, a front torso circumference region, a rear torso circumference region, and a crotch region between the front torso circumference region and the rear torso circumference region. To. The absorber is arranged over the above three regions. Since these are known in the art, their description will be omitted.

The method of storing the plurality of absorbent articles 2 in the packaging bag 3 is not particularly limited and is arbitrary. The absorbent article 2 may be folded in half at approximately the center in the longitudinal direction. The absorbent article 2 is vertically placed with the crease 5 on the upper side of the vertical direction T, and is stacked in the width direction W and arranged in a row, while being stacked in three stages in the vertical direction T and stored in the packaging bag 3. You may. In the case of the present embodiment, the absorbent article 2 is arranged in the packaging bag 3 with the crease 5 on the upper side of the vertical direction T, 13 in the width direction W, and three in the vertical direction T. .. The size of the absorbent article 2 is not particularly limited, and examples thereof include 5 to 30 cm × 5 to 40 cm × 1 to 10 cm in an unfolded state.

The type of the absorbent article is not limited to this example, and other absorbent articles may be used as long as they do not deviate from the scope of the present invention. Other absorbent articles include urine absorbing pads, menstrual napkins, incontinence pads and the like.

The packaging bag 3 is composed of a sheet member made of a synthetic resin such as polyethylene, polypropylene, and polyethylene terephthalate. As the sheet member, for example, a film having a thickness of 40 μm or more and 80 μm or less can be used. By being formed of a film having a thickness of 40 μm or more and 80 μm or less, it has a predetermined strength. Then, the package 1 can more reliably prevent the surface of the package 1 from being unintentionally torn by the pressed finger.

The packaging bag 3 has a vertical direction T and a width direction W and a depth direction D intersecting the vertical direction T. The packaging bag 3 has an upper surface portion 10, a front surface portion 11, a rear surface portion 12, a right surface portion 13, and a left surface portion 14. The packaging bag 3 further has a bottom surface portion 16 in which the lower end portions of each of the front surface portion 11, the rear surface portion 12, the right surface portion 13, and the left surface portion 14 are heat-sealed to each other in the vertical direction T. The packaging bag 3 wraps a plurality of absorbent articles 2 by an upper surface portion 10, a front surface portion 11, a rear surface portion 12, a right surface portion 13, a left surface portion 14, and a bottom surface portion 16. The total weight of the plurality of absorbent articles 2 stored in the packaging bag 3 is, for example, 800 g or more and 3500 g or less, preferably 1100 g or more and 2300 g or less. In the following description, the front surface portion 11, the rear surface portion 12, the right surface portion 13, and the left surface portion 14 may be collectively referred to as a side surface portion. The side surface portion includes a region between the outer edge of the bottom surface portion 16 and the upper edge 2TE of the plurality of absorbent articles 2 in the vertical direction T, and a region to be opened 7 which will be described later.

The upper surface portion 10 is a portion arranged on the upper surface of the package 1, and is a portion above the front surface portion 11, the rear surface portion 12, the right surface portion 13, and the left surface portion 14 in the vertical direction T above the planned opening area 7. be. A certain region having an extension in the width direction W and the depth direction D of the upper surface portion 10 is referred to as a gripping schedule region 6. The planned gripping area 6 includes at least a part of the center between the ends of the upper surface portion 10 in the width direction W and the ends in the depth direction D, both ends of the upper surface portion 10 in the width direction W, and both ends of the depth direction D. It may be included. Specifically, the planned gripping region 6 is a band-shaped region continuous from the center of the upper surface portion 10 in the width direction W and the depth direction D to both ends in the width direction W. The front surface portion 11 and the rear surface portion 12 are portions constituting the front surface and the rear surface of the package 1 (packaging bag 3), and the direction from one of the front surface portion 11 and the rear surface portion 12 to the other is the depth direction D. The right surface portion 13 and the left surface portion 14 are portions constituting the right surface and the left surface of the package 1 (packaging bag 3), and the direction from one of the right surface portion 13 and the left surface portion 14 to the other is the width direction W. The vertical direction T is the extending direction of the cylinder composed of the front surface portion 11, the right surface portion 13, the rear surface portion 12, and the left surface portion 14 adjacent to each other.

In the gripping area 6 of the upper surface portion 10, the upper end portions of the front surface portion 11, the rear surface portion 12, the right surface portion 13 and the left surface portion 14 in the vertical direction T include a coupling portion 17 which is heat-sealed to each other. .. The connecting portion 17 includes a handle portion 18. The handle portion 18 has an opening 24 formed by cutting the joint portion 17 in the thickness direction. The opening 24 has a curved inner edge. The handle portion 18 has a curved hand-carrying portion 25 facing the opening 24. The inner edge of the opening 24 has a substantially elliptical shape having a major axis in the width direction W, and is interrupted at the lower end. That is, the handle portion 18 has a handle piece 26 that is bordered in an elliptical shape and is connected to the joint portion 17 at the lower end. The handle portion 18 is a portion partitioned by the upper end side of the joint portion 17 and the hand-carrying portion 25. The handle portion 18 is not limited to the above configuration, and can be appropriately changed as long as it can exert a gripping function. That is, in this embodiment, the handle piece 26 is not an essential configuration. For example, the handle portion 18 does not have to have the handle piece 26 because the opening 24 is not interrupted at the lower end and has a substantially elliptical shape.

The package 1 (packaging bag 3) has a corner portion 19 at a portion where side surface portions adjacent to each other intersect with each other. That is, a portion where the front surface portion 11 and the right surface portion 13 intersect, a portion where the front surface portion 11 and the left surface portion 14 intersect, a portion where the rear surface portion 12 and the right surface portion 13 intersect, and a portion where the rear surface portion 12 and the left surface portion 14 intersect. Each of them has a corner portion 19. Here, assuming that the portion on the boundary line CL between the side surface portions adjacent to each other is the top portion 20, the boundary between the front surface portion 11 and the right surface portion 13, the boundary between the front surface portion 11 and the left surface portion 14, and the rear surface portion 12 and the right surface portion There is a top 20 at the boundary with 13 and the boundary between the rear surface portion 12 and the left surface portion 14. Therefore, the corner portion 19 is a region including the top portion 20. It should be noted that FIG. 3 is a view of the packaging bag 3 cut at the boundary line CL between the rear surface portion 12 and the left surface portion 14 and developed.

In the present embodiment, the packaging bag 3 has a rectangular parallelepiped shape, and each of the front surface portion 11, the rear surface portion 12, the right surface portion 13, and the left surface portion 14 has a rectangular shape. However, since the package 1 is mainly composed of a easily deformable sheet member and an absorbent article, it does not have to have a strict rectangular parallelepiped shape. For example, a part or all of the side surface portion or a corner, as in a state where the absorbent article 2 is compressed and stored in the packaging bag 3, and then the absorbent article 2 expands and the packaging bag 3 extends from the inside. Part or all of the portion 19 may have a curved surface, be rounded, or have irregularities. The size of the package 1 (packaging bag 3) is not particularly limited, but for example, the length in the width direction W is 10 to 80 cm, the length in the depth direction D is 10 to 80 cm, and the length in the vertical direction T is 10. ~ 100 cm can be mentioned.

The packaging bag 3 has a first weakening line 21 in the planned opening area 7. The planned opening area 7 is a region between the outer edge of the planned gripping area 6 of the upper surface portion 10 and the upper edge 2TE of the plurality of absorbent articles 2 in the vertical direction T. In the case of the present embodiment, the region from the upper end of the joint portion 17 in the vertical direction T to the upper side of the portion where the first weakening line 21 and the second weakening line 22 are formed is the planned gripping region 6, and is the region to be gripped in the vertical direction T. The region from the portion where the first weakening line 21 and the second weakening line 21 are formed to the edge 2TE is the planned opening region 7. The planned opening area 7 includes a corner portion 19 at a portion where side surface portions adjacent to each other intersect with each other. The first weakening line 21 includes a plurality of notch holes formed at intervals in the row direction of the packaging bag 3. The plurality of notch holes penetrate the sheet member of the packaging bag 3 in the thickness direction. The first weakening line 21 is, for example, a perforation, and by pulling the portions on both sides of the first weakening line 21 in the direction of tearing each other, the packaging bag 3 between the cut holes is cut, and the first weakening line 21 is cut. Tear along 21. The first weakening line 21 has a tear strength of 4N or less.

The tear strength of the first weakening wire 21 is determined by pulling the ends of the sheet member having the first weakening wire 21 in a direction parallel to the tensile direction on both sides of the first weakening wire 21 with a tensile tester. It means the maximum load (tear strength) (N) measured when torn. The specific procedure of measurement is as follows. (A) A sample 100 (FIG. 4) made of a sheet member having a width of 50 mm and a length of 75 mm including a weakening line 121 parallel to the long side from the center of the short side is prepared (b). As shown in FIG. 5, the sample 100 is held in a tensile tester (manufactured by Instron) 102 with a chuck distance H of 10 mm, and the tensile strength is measured at a tensile speed of 300 mm / min. (C) The maximum measured strength is defined as the tear strength (N) of the sample (weak line). The sample 100 does not necessarily have to have a width of 50 mm and a length of 75 mm, and may be, for example, a width of 50 mm and a length of 50 mm. Further, the weakening line 121 is not limited to the case where it is parallel to the long side of the sample 100, and may be along the long side.

The tear strength of the first weakening line 21 is preferably smaller than the piercing strength of the sheet member forming the packaging bag 3. The piercing strength is the breaking strength of the seat member when a predetermined jig is pierced into the seat member. In the measurement test of piercing strength, a sheet member is used as a sample, and although not shown, the sample can be placed on the upper surface of the sample table and fixed with a fixture, etc., and inserted into the hole extending from the upper surface of the sample table to the inside. This is a test for measuring the load applied to the jig when the jig arranged in the sample is lowered from above the sample and penetrated through the sample so as to be inserted through the hole. Specifically, the piercing test is performed as follows.

(A) Each sheet member is cut into 70 mm × 70 mm and used as a sample. (B) Place the sample on the upper surface of the sample table and fix it with a fixative or the like. However, a hole (diameter 60 mm × depth 110 mm) extending into the inside of the sample table is formed on the upper surface of the sample table, and the sample is fixed so as to cover the hole. (C) Prepare a digital force gauge FGP-5 (manufactured by Nidec-Shimpo Co., Ltd.) to which a columnar jig (diameter 11 mm × length 100 mm) having a linear tip with a length of 10 mm is connected. (D) The jig is lowered from above the sample at a speed of 500 mm / min, and the load applied to the jig until the sample breaks and the jig penetrates the sample is measured. The maximum load at this time is the breaking strength (N) of the sheet member (packaging bag 3). The jig is measured in both the case where the longitudinal direction of the tip of the jig is arranged to be parallel to the fiber direction of the sheet member and the case where the jig is arranged so as to be orthogonal to each other.

The package 1 has a predetermined relationship between the tensile strength of the first weakening line 21 and the plurality of absorbent articles stored in the packaging bag 3. That is, the tensile strength with respect to the tensile force in the vertical direction T of the first weakening wire 21 having a length of 25 mm is A (N / 25 mm), and the total weight of the plurality of absorbent articles 2 housed in the packaging bag 3 is B (kg). ), Then A and B have the relationship of the following formula.

A / B ≧ 3.5 (N / 25mm / kg) ・ ・ ・ (Equation)

By dividing the tensile strength A (N / 25 mm) by the total weight B (kg) of the plurality of absorbent articles 2 stored in the packaging bag 3, the first weakening line 21 in the package 1 per unit weight. Tensile strength (N / 25 mm / kg) can be obtained.

The tensile strength A (N) of the first weakening line 21 is the end portions of the sheet members on both sides of the sheet member having the first weakening line 21 formed in the direction orthogonal to the tensile direction, with the first weakening line 21 interposed therebetween. It means the maximum load (tear strength) (N / 25 mm) measured by a tensile tester when it is pulled in the tensile direction and torn. "N / 25 mm" means the tear strength (N) per 25 mm width.

The specific procedure of measurement is as follows. (A) A sample 103 made of a sheet member having a width of 25 mm and a length of 100 mm including a weakening line 121 is prepared from the center of the long side to the short side in parallel. (B) As shown in FIG. 6, the sample 103 including the weakening line is held in a tensile tester (manufactured by Instron) 102 with a chuck-to-chuck distance H of 60 mm, and the tensile strength is measured at a tensile speed of 500 mm / min. (C) The maximum measured strength is the tensile strength (N / 25 mm) of the sample. The sample 103 does not necessarily have to have a width of 25 mm and a length of 100 mm, and may be, for example, a width of 25 mm and a length of 30 mm. Further, the weakening line 121 is not limited to the case where it is parallel to the short side of the sample 103, and may be along the short side.

The first weakening line 21 is formed so as to straddle at least one of each corner portion 19 as an end region. In the case of the present embodiment, the first weakening line 21 is formed at each corner portion 19. The first weakening line 21 straddles the corner portion 19 of the front surface portion 11 and the right surface portion 13, and extends from the end portion of the front surface portion 11 on the right surface portion 13 side in the width direction W to the front surface portion of the right surface portion 13 in the depth direction D. It is formed up to the end on the 11th side. Similarly, the first weakening line 21 straddles the corner portion 19 between the front surface portion 11 and the left surface portion 14, and extends from the end portion of the front surface portion 11 on the left surface portion 14 side in the width direction W to the depth direction D in the left surface portion 14. It is formed up to the end on the front surface portion 11 side of the above. The first weakening line 21 straddles the corner portion 19 between the rear surface portion 12 and the right surface portion 13, and extends from the end portion of the rear surface portion 12 on the right surface portion 13 side in the width direction W to the rear surface portion of the right surface portion 13 in the depth direction D. It is formed up to the end on the 12 side. The first weakening line 21 straddles the corner portion 19 of the rear surface portion 12 and the left surface portion 14, and extends from the end portion of the rear surface portion 12 on the left surface portion 14 side in the width direction W to the rear surface portion of the left surface portion 14 in the depth direction D. It is formed up to the end on the 12 side.

The packaging bag 3 may further have a second weakening line 22 in the planned opening area 7. The second weakening line 22 includes a plurality of notch holes formed at intervals in the row direction of the packaging bag 3. The plurality of notch holes penetrate the sheet member of the packaging bag 3 in the thickness direction. The second weakening line 22 is, for example, a perforation, and by pulling the portions on both sides of the second weakening line 22 in a direction to separate them from each other, the packaging bag 3 between the cut holes is cut, and the second weakening line 22 is cut. Separated along 22.

The second weakening line 22 is formed in a range wider than the range in which the first weakening line 21 is formed in the planned opening area 7. The second weakening line 22 extends along the width direction W in each of the front surface portion 11 and the rear surface portion 12 as a central region, and extends along the depth direction D in each of the right surface portion 13 and the left surface portion 14. It is formed in each area. In the front surface portion 11, in the upper portion in the vertical direction T, from the vicinity of the corner portion 19 of the front surface portion 11 and the right surface portion 13 to the vicinity of the corner portion 19 of the front surface portion 11 and the left surface portion 14, the width direction W A second weakening line 22 extending along the line 22 is formed. Similarly, in the rear surface portion 12, in the upper portion in the vertical direction T, from the vicinity of the corner portion 19 between the rear surface portion 12 and the right surface portion 13 to the vicinity of the corner portion 19 between the rear surface portion 12 and the left surface portion 14. A second weakening line 22 extending along the width direction W is formed. In the right surface portion 13, in the upper portion in the vertical direction T, from the vicinity of the corner portion 19 between the right surface portion 13 and the front surface portion 11 to the vicinity of the corner portion 19 between the right surface portion 13 and the rear surface portion 12, the depth direction D A second weakening line 22 extending along the line 22 is formed. In the left surface portion 14, in the upper portion in the vertical direction T, from the vicinity of the corner portion 19 between the left surface portion 14 and the front surface portion 11 to the vicinity of the corner portion 19 between the left surface portion 14 and the rear surface portion 12, the depth direction D A second weakening line 22 extending along the line 22 is formed.

The coupling portion 17 may have a high-rigidity portion 28 heat-sealed by embossing. In the high-rigidity portion 28, the lower end of the joint portion 17 in the vertical direction T, that is, the position in the vertical direction T is between the handle portion 18 and the first weakening line 21, and extends over the entire width direction W of the upper surface portion 10. ing. The high-rigidity portion 28 has a plurality of embossed portions 30. The embossed portions 30 are arranged in a row at predetermined intervals in the width direction W of the connecting portions 17, respectively. The high-rigidity portion 28 is provided on both sides in the vertical direction T with the opening 24 of the handle portion 18 interposed therebetween. The high-rigidity portion 28 may also be provided at the upper end of the joint portion 17.

The handle portion 18 may have a reinforcing film 31. As the reinforcing film 31, for example, a resin film such as polyethylene or polypropylene can be used. The reinforcing film 31 has an area larger than the opening 24, and has an opening 36 of the same size at a position overlapping the opening 24. The upper end portion and the lower end portion of the reinforcing film 31 are heat-sealed at the high-rigidity portion 28 and joined to the joint portion 17.

FIG. 7 is a schematic diagram showing a configuration example of the first weakening line 21 and the second weakening line 22 of the package 1 according to the embodiment. Specifically, it is a schematic diagram which shows the positional relationship between the 1st weakening line 21 and the 2nd weakening line 22 in a corner portion 19 and its vicinity along the surface of a package 1 (packaging bag 3).

The first weakening line 21 may be formed below the center of the vertical direction T in the planned opening area 7. That is, the first weakening line 21 may be formed below the second weakening line 22 in the vertical direction T. The first weakening line 21 may be provided so as to intersect in the width direction. As shown in FIG. 7, the first weakening line 21 may have a curved shape with the apex 20 as the apex and convex downward in the vertical direction T.

The first weakening line 21 may be formed line-symmetrically with respect to the boundary line CL. In this case, in the corner portion 19 provided with the first weakening line 21, the first weakening line 21 overlaps in the vertical direction T on both sides of the top portion 20 when the top portion 20 is folded in a mountain.

Let L1 be the length of the cut hole 32 of the first weakening line 21 in the row direction, and let D1 be the length of the interval 33 of the first weakening line 21 in the row direction. The length L1 is the minimum length from one end of the notch hole 32 in the row direction to the other end on the opposite side. The length D1 is the shortest distance between the ends of the notch holes 32 adjacent to each other in the row direction. The length L1 in the row direction of the cut hole 32 of the first weakening line 21 may be equal to or less than the length D1 in the row direction of the interval 33 of the first weakening line 21. That is, the length L1 of the notch hole 32 may be the same as the length D1 of the interval 33 or shorter than the length D1. The length L1 of the cut hole 32 and the length D1 of the interval 33 preferably have a relationship of L1: D1 = 1: 2. The distance D3 from the top 20 to the end of the first weakening line 21, that is, the end of the cut hole 32 of the first weakening line 21 closest to the top 20, is shorter than the length D1.

Let L2 be the length of the cut hole 34 of the second weakening line 22 in the row direction, and let D2 be the length of the interval 35 of the second weakening line 22 in the row direction. The length L2 is the minimum length from one end of the notch hole 34 in the row direction to the other end on the opposite side. The length D2 is the shortest distance between the ends of the notch holes 34 adjacent to each other in the row direction. The length L1 of the notch hole 32 of the first weakening wire 21 and the length L2 of the notch hole 34 of the second weakening wire 22, and the length D1 of the interval 33 of the first weakening wire 21 and the interval 35 of the second weakening wire 22. At least one of the lengths D2 of is different. That is, the lengths L1, L2, D1 and D2 may be adjusted so that the tensile strength and the tear strength of the second weakening wire 22 are higher than those of the first weakening wire 21.

For example, when the length L1 of the first weakening line 21 and the length L2 of the second weakening line 22 are the same, the length D1 of the first weakening line 21 and the length D2 of the second weakening line 22 are different. In this case, the length D1 of the first weakening line 21 may be shorter than the length D2 of the second weakening line 22. Alternatively, when the length D1 of the first weakening line 21 and the length D2 of the second weakening line 22 are the same, the length L1 of the first weakening line 21 and the length L2 of the second weakening line 22 are different. In this case, the length L1 of the first weakening line 21 may be longer than the length L2 of the second weakening line 22. That is, the length L1 of the cut hole of the first weakening line 21 in the row direction may be longer than the length L2 of the cut hole of the second weakening line 22 in the row direction. The ratio of the length L1 to the length D1 of the first weakening line (L1 / D1) may be larger than the ratio of the length L2 to the length D2 of the second weakening line (L2 / D2). For example, the ratio (L1 / D1) may be 0.4 to 0.6, and the ratio (L2 / D2) may be 0.1 to 0.3.

The adjacent first weakening line 21 and the second weakening line 22 are separated from each other. Assuming that the distance between the adjacent first weakening line 21 and the second weakening line 22 is D4, the distance D4 is longer than the length D2 of the first weakening line 21. The adjacent first weakening line 21 and the second weakening line 22 are separated from each other by the length D1 in the column direction of the interval of the first weakening line 21. The distance D4 is the shortest distance measured along the surface of the packaging bag 3. The distance D4 is set so that it can maintain sufficient strength against the pulling force in the vertical direction T during transportation and can smoothly tear from the first weakening line 21 to the second weakening line 22 at the time of opening. Is preferable.

Although it depends on the size of the package 1, the size of the distance D4 is 0.1 to 4 cm, preferably 0.5 to 3 cm. When the distance D4 is within the above range, the pulling force acting on the packaging bag 3 in the planned opening area 7 is dispersed in the first weakening line 21 and the second weakening line 22, respectively, and the force in the tearing direction propagates. It can be suppressed from becoming difficult.

Next, a method for manufacturing the package 1 according to the embodiment will be described.
FIG. 8 is a schematic view showing an example of a method for manufacturing the package 1 according to the embodiment. In this manufacturing method, as an example, a manufacturing method of the gusset type package 1 will be described. However, this manufacturing method has a transport direction MD, a transverse direction CD, and a thickness direction TD (not shown) that are orthogonal to each other in the transport of materials in each step.

First, a packaging bag 3 capable of storing a plurality of absorbent articles 2 is formed. The method for forming the packaging bag 3 includes a side surface forming step and a weakening line forming step.

In the side surface forming step, both sides of the transverse CD in the tubular resin sheet member 50 extending along the transport direction MD (FIG. 8A) are folded in valley folds toward the inside of the transverse CD. .. As a result, the side surface forming step is folded between the front surface portion 11 and the rear surface portion 12 located on one side and the other side of the thickness direction TD, respectively, and the front surface portion 11 and the rear surface portion 12, and is folded on the right side of the transverse direction CD. And the right side portion 13 and the left side portion 14 located on the left side, respectively (FIG. 8 (b)). At this time, the front surface portion 11 and the rear surface portion 12 overlap in the thickness direction TD, and the right side portion and the right surface portion 13 of the front surface portion 11 and the rear surface portion 12 overlap in the thickness direction TD, and the front surface portion 11 The left side portion of the rear surface portion 12 and the left surface portion 14 overlap with each other in the thickness direction TD.

In the weakening line forming step, the weakening line forming blade (not shown) is pressed from one side of the front surface portion 11 and the rear surface portion 12 toward the other side (in the thickness direction TD). For example, the folded sheet member 50 is sandwiched between a roll having a weakening line forming blade and an anvil roll. As a result, the weakening line forming step forms the first weakening line 21 and the second weakening line 22 extending along the transverse direction CD on the front surface portion 11 and the rear surface portion 12. Along with this, at the same time, the first weakening line 21 and the second weakening line 21 and the second weakening line 21 extending along the transverse direction CD are located between the front surface portion 11 and the rear surface portion 12 and overlap the right surface portion 13 and the left surface portion 14 in the thickness direction TD. The weakening line 22 is formed. At this time, the first weakening line 21 and the second weakening line 22 are formed so that the distance D4 is longer than the length D1 of the first weakening line 21. It should be noted that the second weakening line 22 has a plurality of absorbent articles 2 when the upper surface portion 10 is gripped and the package 1 is lifted after the separation of at least one adjacent first weakening line 21 is performed. Due to the weight, the cutoff of the first weakening line 21 may be formed at a position where it cannot be reached even if it propagates to the corner portion 19. At the same time, the handle portion 18 may be formed. As described above, the packaging bag 3 is formed (FIG. 8 (c)).

At this time, when the packaging bag 3 of FIG. 8C is cut at the boundary line CL between the rear surface portion 12 and the left surface portion 14 and unfolded, the result is as shown in FIG. Here, consider the region STA including the boundary line CL between the right surface portion 13 and the front surface portion 11. However, in the region STA, the width in the direction parallel to the bottom surface portion 16 along the surface of the packaging bag 3 (width direction W and depth direction D) is the same as the width of the right surface portion 13, and is along the surface of the packaging bag 3. The center in the direction parallel to the bottom surface portion 16 (width direction W and depth direction D) is the region where the boundary line CL between the right surface portion 13 and the front surface portion 11 is located. At this time, in the region STA, the first weakening line 21 straddling the boundary line CL is axisymmetric with respect to the boundary line CL. Further, the second weakening line 22 of the front surface portion 11 adjacent to both sides of the boundary line CL and the second weakening line 22 of the right surface portion 13 are line-symmetrical with respect to the boundary line CL. The same applies to the region STA (not shown) including the other boundary line CL. For example, in the region STA including the boundary line CL between the right surface portion 13 and the rear surface portion 12, the width thereof is the same as the width of the right surface portion 13, the first weakening line 21 straddling the boundary line CL, the adjacent rear surface portions 12, and the adjacent rear surface portions 12. The second weakening line 22 of the right surface portion 13 is axisymmetric with respect to the boundary line CL. Further, in the region STA including the boundary line CL between the left surface portion 14 and the front surface portion 11, the width thereof is the same as the width of the left surface portion 14, and the first weakening line 21 straddling the boundary line CL, the adjacent front surface portions 11 and The second weakening line 22 of the left surface portion 14 is axisymmetric with respect to the boundary line CL. Further, in the region STA including the boundary line CL between the left surface portion 14 and the rear surface portion 12, the width thereof is the same as the width of the left surface portion 14, and the first weakening line 21 straddling the boundary line CL, the adjacent rear surface portions 12 and The second weakening line 22 of the left surface portion 14 is axisymmetric with respect to the boundary line CL.

After that, the bottom surface side portion of the formed packaging bag 3 is sealed by heat fusion to form the bottom surface portion 16. Next, a plurality of absorbent articles 2 are stored from the upper surface side of the packaging bag 3. Finally, the upper surface side portion of the packaging bag 3 is sealed by heat fusion to form the joint portion 17. As described above, the gusset type package 1 is formed. The corner portion 19 is a portion folded in a valley fold on the right side and the left side in the width direction W between the front surface portion 11 and the rear surface portion 12, respectively.

FIG. 9 is a schematic view showing a mode in which the package 1 according to the embodiment is completely or partially opened. As shown in FIG. 9A, in the embodiment in which the package 1 is completely opened, the first weakening line 21 and the second weakening line 22 are separated from each other on all of the plurality of side surface portions. That is, the user sandwiches the corner portion 19 with his / her fingers and tears the corner portion 19 along the first weakening line 21. As a result, the first cutting line 21a is formed on the packaging bag 3. The user then tears the packaging bag 3 along the second weakening line 22 adjacent to the first weakening line 21. As a result, the second cutting line 22a is formed on the packaging bag 3. In this way, the first cutting line 21a and the second cutting line 22a are formed on all of the plurality of side surface portions, the upper surface portion 10 is removed, and the opening OP is formed. The user can remove the absorbent article 2 from the opening OP. On the other hand, as shown in FIG. 9B, in the embodiment in which the package 1 is partially opened, in a part of the plurality of side surface portions (example: front surface portion 11, right surface portion 13 and left surface portion 14). The first weakening line 21 and the second weakening line 22 are separated. As a result, the first cutting line 21a and the second cutting line 22a are formed on a part of the plurality of side surface portions (example: front surface portion 11, right surface portion 13 and left surface portion 14), and an opening OP is formed. To. The user can remove the absorbent article 2 from the opening OP. In addition, the user grips the handle portion 18 of the joint portion 17 with the hand H in a state where the upper surface portion 10 is connected to the other part of the plurality of side surface portions (eg, the rear surface portion 12). The package 1 can be carried.

Since the corner portion 19 can be easily torn when the tear strength of the first weakening line 21 is 4N or less, the first weakening line 21 can be a starting point when opening. Therefore, the package 1 can be easily opened starting from the first weakening line 21. That is, the first weakening line 21 can be an opening start portion as a starting point when opening.

The first weakening line 21 is provided in the planned opening area 7 between the outer edge of the planned gripping area 6 and the upper edge edge 2TE of the plurality of absorbent articles 2 in the vertical direction T. That is, the first weakening line 21 is located on the line of action of the force generated on the handle portion 18 when the handle portion 18 of the planned gripping area 6 is gripped by the absorbent article 2 stored in the packaging bag 3. Then, at the time of transportation, that is, when the handle portion 18 is gripped and the package 1 is lifted, the force acting on the handle portion 18 also acts on the first weakening line 21. The tensile strength A with respect to the tensile force in the vertical direction T of the first weakening line 21 and the total weight B of the plurality of absorbent articles 2 have a relationship of A / B ≧ 3.5 (N / 25 mm / kg). During transportation, it is possible to prevent the first weakening line 21 from being torn by the force acting on the handle portion 18. Therefore, it can be said that the package 1 has durability during transportation.

It is preferable that the packaging bag 3 has both durability and ease of opening. The total weight of the plurality of absorbent articles 2 stored in the packaging bag 3 varies depending on the use and the number of the absorbent articles 2. For example, when the same packaging bag is applied to packages having different total weights of a plurality of absorbent articles to be stored, the durability of the packaging bag may become excessive. That is, when a packaging bag formed for a package having a large total weight is applied to a package having a small total weight, it can be said that the durability of the packaging bag is excessive. By applying a packaging bag using a sheet member having a lower strength to a package having a smaller total weight, durability and openability can be more appropriately obtained while eliminating waste of the sheet member. In the packaging bag 3 of the present embodiment, the tear strength of the first weakening wire 21 is 4N or less, the tensile strength A (N / 25mm) of the first weakening wire 21 and a plurality of absorbent properties stored in the packaging bag 3. By having the relationship of the above formula with the total weight B (kg) of the article 2, it is possible to obtain a package containing the first weakening wire 21 having appropriate tear strength and tensile strength according to the total weight. That is, by forming the sheet member and the first weakening wire 21 according to the total weight, it is possible to obtain the package 1 having both durability and ease of opening more reliably.

The force acting on the packaging bag 3 in the planned opening area 7 differs depending on the presence / absence of the handle portion 18, the position of the handle portion 18, and the shape of the handle portion 18. At least one of the length L1 of the first weakening line 21 and the length L2 of the second weakening line 22, and the length D1 of the first weakening line 21 and the length D2 of the second weakening line 22 is different. That is, depending on the position in the planned opening area 7, at least one of the length of the first weakening line 21 and the second weakening line 22 in the row direction of the plurality of cut holes and the length in the row direction of the spacing is set. By making appropriate changes, the package 1 can more reliably adjust the durability during transportation and the ease of opening.

In this case, by adjusting the lengths L1, L2, D1 and D2 so that the tensile strength and tear strength of the second weakening wire 22 are higher than those of the first weakening wire 21, the second weakening wire 22 is weakened during transportation. A wider opening can be formed by preventing the wire 22 from being torn and by forming the second weakening wire 22 over a wider area. That is, the second weakening line 22 can be an opening expansion portion that forms a wider opening after the first weakening line 21 is the starting point.

When the length L1 of the first weakening line 21 in the row direction of the cut holes is equal to or less than the length D1 in the row direction of the spacing, deformation of the cut holes due to the pulling force in the vertical direction T can be suppressed. Therefore, it is possible to prevent the packaging bag 3 from being torn from the first weakening line 21 as a starting point, that is, the adjacent notch holes are connected due to the deformation of the notch holes during transportation. Therefore, the package 1 can prevent the package bag 3 from being torn during transportation.

Assuming that the distance between the adjacent first weakening line 21 and the second weakening line 22 is D4, the distance D4 is longer than the length D2 of the first weakening line 21. As a result, in the packaging bag 3, the force acting when the handle portion 18 is gripped is dispersed in the first weakening line 21 and the second weakening line 22, respectively. Then, it is possible to prevent the adjacent first weakening line 21 and the second weakening line 22 from affecting each other, that is, the first weakening line 21 and the second weakening line 22 are chained and torn. Therefore, the package 1 can prevent the package bag 3 from being torn during transportation.

Since the package 1 is provided with the first weakening line 21 so as to straddle at least one top 20 of the corner portion 19, the packaging bag 3 starts from the first weakening line 21 by sandwiching the corner portion 19 with fingers. Can be easily opened by tearing. Further, in the corner portion 19, the distance from the top portion 20 to the end portion of the first weakening line 21 is shorter than the length in the column direction of the spacing, that is, the spacing between the adjacent notch holes. The packaging bag 3 can be torn more easily at the starting point.

The corner portion 19 is formed by folding the right surface portion 13 and the left surface portion 14 inward in a direction intersecting the vertical direction T between the front surface portion 11 and the front surface portion 11, respectively, in a valley fold. The portion 19 can be more easily pinched by the fingers. Therefore, the packaging bag 3 can be opened more easily by sandwiching the corner portion 19 with fingers and tearing the packaging bag 3 starting from the first weakening line 21. Further, the second weakening line 22 is provided in a wide range of the front surface portion 11 and the rear surface portion 12, and the length L1 of the cut hole of the first weakening line 21 in the row direction is the cut hole of the second weakening line 22. The ratio of the length L1 to the length D1 of the first weakening line, which is longer than the length L2 in the column direction (L1 / D1), is the ratio of the length L2 to the length D2 of the second weakening line (L2 / D2). Greater. Therefore, since the second weakening wire 2 has a higher tensile strength with respect to the tensile force in the vertical direction than the first weakening wire 21, it is possible to prevent the second weakening wire 22 from being torn during transportation.

In the corner portion 19 provided with the first weakening line 21, the first weakening line 21 overlaps in the vertical direction T on both sides of the top portion 20. Since the force when tearing the corner 19 is not dispersed in the package 1, the package bag 3 can be torn more easily, and as a result, the package 1 can be easily opened.

Since the first weakening line 21 is formed below the center of the vertical direction T in the planned opening area 7, the force acting on the first weakening line 21 from the packaging bag 3 in the planned gripping area 6 is scheduled to be opened. Disperse through the packaging bag 3 in region 7. Therefore, since the force acting on the first weakening wire 21 becomes small, it is possible to prevent the first weakening wire 21 from being torn during transportation.

By providing the first weakening line 21 so as to intersect in the width direction, the force acting on the first weakening line 21 from the packaging bag 3 in the planned gripping area 6 is dispersed. Therefore, it is possible to prevent the first weakening wire 21 from being torn during transportation. The first weakening line 21 has a curved shape with the apex 20 as the apex and is convex downward in the vertical direction T, so that the force acting on the first weakening line 21 can be more reliably dispersed. .. The first weakening line 21 has a curved shape that is lower than the second weakening line 22 and is convex downward in the vertical direction T, so that the joint portion 17 and the upper side of the absorbent article 2 have a curved shape. The edge 2TE is orthogonal to the direction of the force pulling the edge 2TE in the vertical direction. Therefore, at the time of opening, the first weakening line 21 can be easily torn by lifting the joint portion 17 upward and pushing down the upper edge 2TE of the absorbent article 2 downward.

Since the tensile strength of the first weakening line 21 and the second weakening line 22 is smaller than the piercing strength of the packaging bag 3, the first weakening line rather than making a hole in the surface of the package 1 by the finger pressed at the time of opening. 21 and the second weakening line 22 are preferentially torn. Therefore, the package 1 can appropriately tear the packaging bag 3 along the first weakening line 21 and the second weakening line 22, and thus can be opened more easily.

Since the absorbent article 2 contains a dense absorber in the substantially center in the longitudinal direction, the center of gravity is located close to the crease 5. Therefore, by folding the absorbent article 2 in half and arranging the crease 5 in the packaging bag 3 above the vertical direction T, the position of the center of gravity of the package 1 is higher than the vertical direction T. Then, the moment of the package 1 having the upper surface portion 10 as the center of rotation becomes smaller by the amount that the position of the center of gravity is higher. Therefore, during transportation, the force acting on the first weakening line 21 when the package 1 is shaken can be suppressed, and when the packaging body 1 collides with an obstacle or the like, the force is applied to the first weakening line 21. The impact can be made smaller. Therefore, the package 1 can prevent the first weakening wire 21 from being torn during transportation.

Since the packaging bag 3 has the handle portion 18 in the planned gripping area 6, the gripping position is determined, so that the force acting on the first weakening line 21 is stable. That is, it is possible to prevent an excessive force from unintentionally acting on the first weakening line 21. Therefore, the package 1 can prevent the first weakening wire 21 from being torn during transportation.

The high-rigidity portion 28 disperses the force acting on the handle portion 18 over the entire width direction W. That is, the package 1 can reduce the force acting on the first weakening wire 21 by absorbing the force acting on the handle portion 18 in a wider range of the upper surface portion 10, so that the first weakening wire 21 can be transported. Can be prevented from being torn.

Since the opening 24 of the hand-carrying portion 25 is curved, it is possible to prevent stress from concentrating on a part of the hand-carrying portion 25 due to the weight of the plurality of absorbent articles 2 stored in the packaging bag 3. That is, it is possible to prevent the handle portion 18 from being torn and damaged from a part of the hand-carrying portion 25 in which stress is concentrated. Then, even when the packaging bag 3 is formed by using a sheet member having low strength from the viewpoint of improving the openability, the durability of the handle portion 18 can be maintained. Therefore, the package 1 can be provided with durability during transportation.

The strength of the handle portion 18 can be improved by providing the reinforcing film 31. Then, even when the packaging bag 3 is formed by using a sheet member having low strength from the viewpoint of improving the openability, the durability of the handle portion 18 can be maintained. Therefore, the package 1 can be provided with durability during transportation.

The package 1 of the present invention is not limited to the above-described embodiment, and is applied by addition / replacement of other techniques without departing from the spirit and purpose of the present invention, as long as there is no technical contradiction. Is possible.

For example, in the case of the above embodiment, the case where the first weakening line 21 is formed below the center of the vertical direction T in the planned opening region 7 has been described, but the present invention is not limited to this. That is, as shown in FIG. 10, the first weakening line 21 may be formed above the center of the vertical direction T in the planned opening area 7. That is, the first weakening line 21 may be formed above the second weakening line 22 in the vertical direction T. The first weakening line 21 shown in FIG. 10 has a top portion 20 as an apex and has a convex shape on the upper side in the vertical direction T. Therefore, the position of the first weakening line 21 in the package 1 does not overlap with the position of the stored absorbent article 2. Therefore, even if the package 1 is inflated by the stored absorbent article 2, the user can easily, for example, in the vicinity of the first weakening line 21 without being affected by the inflated portion. The first weakening line 21 can be easily torn by picking. That is, the package 1 can be easily opened. Further, for example, the handle portion may be a single strip-shaped sheet member, and both ends may be joined to both ends in the width direction W of the planned gripping region 6. Further, the handle portion may be two strip-shaped sheet members, which may be arranged on the front surface side and the rear surface side, respectively, and both ends may be evenly joined in the width direction of the planned gripping area 6.

(sample)
<Sheet member>
Polyethylene sheet members having thicknesses of 50 μm, 60 μm, and 70 μm were prepared, respectively. Weak lines with different cutout hole lengths and spacing lengths were formed on each sheet member.
<Packaging>
Using a sheet member having a thickness of 50 μm, a packaging bag having a length of 240 mm in the width direction, a length of 190 mm in the depth direction, and a height of 340 mm was formed. A plurality of absorbent articles were stored inside the packaging bag, and four types of packages having different weights in 0.5 kg increments from 2 kg to 3.5 kg were formed. The upper surface portion of the package was joined by heat fusion, and as shown in FIG. 1, a handle portion, a first weakening line and a second weakening line were formed.

(Evaluation method)
Using the obtained sample, a tear test and a tensile test were performed according to the above procedure. Further, a drop test was performed using the drop tester 104 shown in FIG. The drop tester 104 includes a support column 105 and an arm portion 106 that is held so as to be vertically movable with respect to the support column 105. The state of the first weakening line when the package 1 was hung from the hook 107 provided on the arm portion 106 and dropped from a predetermined height was confirmed. The height of the package 1 to be dropped is such that the distance from the ground to the bottom surface 16 of the package 1 is 60 cm. The breakdown of each sample and the test results are shown in Tables 1 and 2. In Table 2, the results of the drop test are "○" when no tear is found in the first weakening line, "△" when the cutout hole of the first weakening line is widened, and adjacent cutouts of the first weakening line. When the holes are connected to each other and a tear is found, it is indicated as "x".

As a result of Table 1, it was confirmed that the tear strength of each of Examples 1 to 7 was 4N or less. In the sensitivity evaluation, it was evaluated that all of them could be torn with a light force. Although Examples 8 and 9 have not been measured, it is presumed that the tear strength is less than 4N even when compared with Examples 4 to 6.

From the results in Table 2, all of Examples 1, 4 and 7 have a tensile strength of 12 (N / 25 mm) or more, and even when an absorbent article of 3.5 (kg) is stored, the packaging bag is subjected to the drop test. No tear was found in the first weakening line of. On the other hand, in Reference Example 1, a tear was observed in the first weakening line in a state where 2.5 (kg) of absorbent article was stored.
From this result, it can be said that 12.3 (N / 25 mm) is required to have sufficient durability against a weight of 3.5 (kg). Therefore, assuming that the tensile strength is A (N / 25 mm) and the total weight of the absorbent article 2 is B (kg), the relational expression of A / B ≧ 3.5 (N / 25 mm / kg) indicates (12.3). From [N / 25 mm] /3.5 [kg]) = 3.5 (N / 25 mm / kg), the first weakening line has a tensile strength of 3.5 (N / 25 mm / kg), so that the package is packaged. It can be said that the body has the durability required for transporting an absorbent article having a total weight of 3.5 (kg).
As a result of piercing tests on polyethylene sheet members having thicknesses of 50 μm, 60 μm, and 70 μm, it was confirmed that the piercing strength exceeded the tear strength.

1: Package 2: Absorbent article 3: Packaging bag 6: Planned grip area 10: Top surface 11: Front surface 12: Rear surface 13: Right surface 14: Left surface 21: First weakening line

Claims (17)

With multiple absorbent articles,
A packaging bag containing the plurality of absorbent articles, including the vertical direction, and having an upper surface portion, a front surface portion, a rear surface portion, a right surface portion, and a left surface portion.
It is a packaging body equipped with
The packaging bag has a first weakening line having a tear strength of 4 N or less in the planned opening area between the outer edge of the upper surface portion to be gripped and the upper edge of the plurality of absorbent articles in the vertical direction. Have,
The tensile strength of the first weakening line with respect to the vertical tensile force is 3.5 N / 25 mm / kg.
Packaging body. The first weakening line is provided in the end region of the planned opening area in the direction intersecting the vertical direction.
A second weakening line is further provided in the central region of the planned opening region in the direction intersecting the vertical direction.
The first weakening line and the second weakening line each include a plurality of notch holes formed at intervals in the row direction.
1. Package. The package according to claim 2, wherein the length of the plurality of cut holes of the first weakening line in the row direction is equal to or less than the length of the interval of the first weakening line in the row direction. The package according to claim 2 or 3, wherein in the planned opening area, the adjacent first weakening line and the second weakening line are separated from each other. The packaging bag has a corner in the planned opening area and has a corner.
The corner portion includes a portion where the front surface portion and the right surface portion intersect, a portion where the front surface portion and the left surface portion intersect, a portion where the rear surface portion and the right surface portion intersect, and the rear surface portion and the left surface portion. Is each of the intersecting parts,
The first weakening line is provided so as to straddle at least one top of the corner.
In the corner portion provided with the first weakening line, the distance from the top portion of the corner portion to the end portion of the first weakening line is shorter than the length of the interval in the column direction.
The package according to any one of claims 2 to 4. The packaging bag has a corner in the planned opening area and has a corner.
The corner portion includes a portion where the front surface portion and the right surface portion intersect, a portion where the front surface portion and the left surface portion intersect, a portion where the rear surface portion and the right surface portion intersect, and the rear surface portion and the left surface portion. Is each of the intersecting parts,
The corner portion is formed by folding the right surface portion and the left surface portion into a valley fold inside the packaging bag in a direction intersecting the vertical direction between the front surface portion and the rear surface portion, respectively. Ori,
The first weakening line is provided so as to straddle at least one top of the corner.
The second weakening line is provided on the front surface portion and the rear surface portion.
The length of the notch hole of the first weakening line in the row direction is longer than the length of the notch hole of the second weakening line in the row direction, or the length of the interval of the first weakening line in the row direction. 2. The package according to item 1. The package according to claim 5 or 6, wherein in the corner portion provided with the first weakening line, the first weakening line overlaps in the vertical direction on both sides of the top portion. The package according to any one of claims 2 to 7, wherein the first weakening line is formed below the center in the vertical direction in the planned opening area. The package according to any one of claims 2 to 7, wherein the first weakening line is formed above the center in the vertical direction in the planned opening area. The package according to any one of claims 2 to 9, wherein the tensile strength of the first weakening line and the second weakening line with respect to the vertical tensile force is smaller than the piercing strength of the packaging bag. The package according to any one of claims 2 to 10, wherein the packaging bag is made of a film having a thickness of 40 μm or more and 80 μm or less. The package according to any one of claims 2 to 11, wherein the total weight of the plurality of absorbent articles is 800 g or more and 3500 g or less. The package according to any one of claims 2 to 12, wherein the plurality of absorbent articles are folded in half and the folds are arranged on the upper side in the vertical direction. The package according to any one of claims 2 to 13, wherein the packaging bag has a handle portion in the gripping area. The packaging bag has a highly rigid portion and has a high rigidity portion.
The high-rigidity portion is formed by embossing, and the vertical position extends between the handle portion and the first weakening line and extends over the entire area of the upper surface portion in a direction intersecting the vertical direction. Yes,
The package according to claim 14. The packaging bag further has a joint portion that joins the upper end portion of the front surface portion and the rear surface portion.
The handle portion is provided at the joint portion, and the handle portion is provided.
The handle portion has an opening formed by cutting the joint portion in the thickness direction.
The opening has a curved handbag,
The package according to claim 14 or 15. The package according to any one of claims 14 to 16, wherein the handle portion is provided with a reinforcing film.

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