JP7039274B2 - Absorbent article - Google Patents

Description

The present invention relates to absorbent articles such as menstrual napkins.

In an absorbent article such as a sanitary napkin, a technique of providing a three-dimensional guard on the surface side of a main body provided with an absorber is known in order to prevent the liquid from leaking to the outside in the width direction (see Patent Documents 1 and 2). ). The three-dimensional guard is fixed to the surface of the main body and stands up toward the wearer's skin side due to the contraction of the thread-like elastic member.

On the other hand, when using a menstrual napkin while sleeping, leakage of the liquid to the outside in the width direction becomes a problem in the sideways posture, while in the supine or prone position, the liquid is leaked from the gap created between the wearer and the wearer. Is easy to leak in the front-back direction. For this reason, in order to provide a three-dimensional guard on the sanitary napkin and prevent the formation of a gap with the wearer and prevent the liquid from leaking in the front-rear direction, an absorbent core having a high basis weight and a thick high basis weight portion is provided. The technique to be provided is known (see Patent Document 3).

Japanese Patent Application Laid-Open No. 2003-210525 Japanese Unexamined Patent Publication No. 2007-1436997 Japanese Unexamined Patent Publication No. 2006-239162

When the basis weight of the absorbent core is high, the rigidity of the absorbent core and the main body containing it increases, and wrinkles caused by the movement of the wearer and wrinkles caused by the folding structure at the time of individual packaging are deeply carved in the main body. Cheap. When such wrinkles are formed, the three-dimensional guard fixed to the surface of the main body also deforms following the wrinkles, and it becomes difficult to stand up stably.

An object of the present invention relates to an absorbent article capable of stably erecting a three-dimensional guard.

In order to achieve the above object, the absorbent article according to one embodiment of the present invention includes a main body, a pair of wing portions, and a pair of three-dimensional guards.
The body has a first main surface and a second main surface opposite the first main surface, and is a narrow intermediate core formed over a first length by a pair of constricted regions. It contains an absorbent core having a longitudinal direction and a width direction including a portion.
The pair of wing portions are arranged outside the width direction of the constricted region, have a second length shorter than the first length in the longitudinal direction, and are mutually in the width direction with the main body interposed therebetween. opposite.
The pair of three-dimensional guards are provided on both sides of the first main surface in the width direction, and extend in the longitudinal direction across the constricted region.

As described above, according to the absorbent article of the present invention, the three-dimensional guard can be stably erected.

It is a perspective view which shows the absorbent article which concerns on 1st Embodiment of this invention. It is a top view of the absorbent article. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 1 of the absorbent article. It is a top view of the absorbent core of the said absorbent article. It is a top view of the absorbent article which shows the arrangement of the absorbent core, a three-dimensional guard, and a wing portion. It is a top view which shows the absorbent article package which concerns on 2nd Embodiment of this invention. It is a top view which shows the aspect which developed the said absorbent article packaging body. It is a plan view which shows the aspect which developed the said absorbent article package, and is the figure which shows the position of the folding line in the main body of the said absorbent article.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
[Overall composition of napkin]
FIG. 1 is a perspective view showing an absorbent article 1 according to an embodiment of the present invention. In FIG. 1, the X-axis direction corresponds to the front-rear direction, the Y-axis direction corresponds to the left-right direction, and the Z-axis direction corresponds to the up-down direction.
FIG. 2 is a plan view of the absorbent article 1 and shows an aspect in which the absorbent article 1 shown in FIG. 1 is stretched along an XY plane. In the absorbent article 1 shown in FIG. 2, the X-axis direction corresponds to the longitudinal direction, the Y-axis direction corresponds to the width direction, and the Z-axis direction corresponds to the thickness direction. Hereinafter, the absorbent article 1 will be described in the embodiment shown in FIG.
The absorbent article 1 of the present embodiment is configured as a menstrual napkin, and is hereinafter referred to as a napkin 1.
The napkin 1 of the present embodiment may be used at bedtime, and may have a length of, for example, 30 cm or more along the longitudinal direction.

In the present embodiment, the napkin 1 includes a main body M, a pair of wing portions W, a pair of three-dimensional guards G, and a pair of rear flap portions F.

The main body M extends in the X-axis direction. The main body M has a front region M1, an intermediate region M2, and a rear region M3, which are divided along the longitudinal direction.
The anterior region M1 is a region arranged in front of the intermediate region M2 (ventral side of the wearer), and is configured to face the front of the excretion region of the wearer at the time of wearing.
The intermediate region M2 is configured to face the wearer's excretion region when worn. The intermediate region M2 is a region that overlaps with the total length of the wing portion W described later in the longitudinal direction. The intermediate region M2 may be located closer to the front of the main body M as shown in the figure, or may be located at the center of the main body M.
The posterior region M3 is a region arranged behind the intermediate region M2 (dorsal side of the wearer), and is configured to face the rear of the excretion region of the wearer at the time of wearing.

The pair of wing portions W are arranged outside the intermediate region M2 in the width direction, and face each other in the width direction with the main body M interposed therebetween. The wing portion W is configured so as to greatly project outward in the width direction from the main body M. The boundary portion of the wing portion W with the main body M is defined as the base portion Wa.
The wing portion W is bent from the vicinity of the base portion Wa so as to face the main body M with the underwear sandwiched between the wing portions W, and is fixed to the outer surface of the wearer's underwear. The wing portion W can prevent the position of the napkin 1 from being displaced during mounting, and can prevent the liquid from leaking to the outside of the napkin 1.

The three-dimensional guard G is provided on the peripheral edge in the width direction of the main body M, and is arranged so as to extend in the longitudinal direction. The three-dimensional guard G stands up in the thickness direction during mounting and can prevent liquid leakage in the width direction. In addition, "standing up in the thickness direction" means standing up toward the wearer side.

The rear flap portion F is configured to bulge outward in the width direction of the rear region M3, and is mounted on the region facing the buttocks on the inner surface of the wearer's underwear at the time of wearing. Thereby, the rear flap portion F can prevent the displacement of the rear region M3 and support the rear leakage prevention function by the rear region M3. The napkin 1 may have a configuration that does not have the rear flap portion F.

[Structure of each part of napkin]
FIG. 3 is a cross-sectional view taken along the line III-III of FIG.

(Main body)
The main body M has a first main surface 12a on the upper side in the Z-axis direction and a second main surface 13a on the lower side in the Z-axis direction on the opposite side of the first main surface 12a, and absorbs the absorber 11 described later. Contains the sex core 20. The first main surface 12a is a surface facing the wearer side at the time of use, and the second main surface 13a is a surface facing the underwear side.
The main body M has a structure in which a back surface sheet 13, an absorber 11, and a front surface sheet 12 are laminated.

The absorber 11 has an absorbent core 20 and a core wrap sheet 30.

The absorbent core 20 has a function of absorbing and retaining a liquid. The absorbent core 20 may be formed of, for example, a fiber aggregate composed of hydrophilic fibers such as pulp fibers, or may have a structure in which the fiber aggregate retains a water-absorbing polymer. .. The detailed configuration of the absorbent core 20 will be described later.

The core wrap sheet 30 has a function of covering the absorbent core 20 and, for example, maintaining the shape of the absorbent core 20. The core wrap sheet 30 is made of a thin and soft paper such as tissue paper, a liquid-permeable non-woven fabric, or the like.

The surface sheet 12 is configured as a liquid-permeable sheet material and is arranged on the absorber 11. The surface sheet 12 constitutes a first main surface 12a above the Z-axis direction of the napkin 1 in the main body M.

The surface sheet 12 is formed with a squeeze groove 16.
The squeezing groove 16 is configured as a linear groove formed by squeezing the absorber 11 and the surface sheet 12. The squeezing groove 16 is configured to orbit the main body M as shown in FIGS. 1 and 2. It should be noted that the "circumferential" is a form in which the squeezing groove 16 extends continuously and circulates, and a shape in which a plurality of squeezing portions are intermittently arranged and can be regarded as one groove as a whole. It is a meaning that includes both the form and the form.

The back surface sheet 13 is arranged so as to face the front surface sheet 12 in the thickness direction with the absorber 11 interposed therebetween. The back sheet 13 constitutes a second main surface 13a below the Z-axis direction of the napkin 1. The back surface sheet 13 is joined to the front surface sheet 12 and the side sheet 14 by, for example, an adhesive, a heat seal, or the like at a peripheral portion.

An adhesive portion 15 is provided on the second main surface 13a of the back sheet 13.
The adhesive portion 15 is configured to fix the napkin 1 to the underwear, and is formed on the second main surface 13a of the back surface sheet 13. The adhesive portion 15 has, for example, a main body adhesive portion 151 provided in the main body M and a wing adhesive portion 152 provided in the wing portion W, and is additionally provided in the rear flap portion F (shown in the figure). May have).

(Wing part)
The wing portion W has a configuration in which the back surface sheet 13 and the side sheet 14 are laminated, and may additionally have a configuration in which the front surface sheet 12 is laminated in whole or in part.

The side sheets 14 face each other in the width direction with the surface sheet 12 interposed therebetween, and are arranged on the peripheral edge portion in the width direction of the napkin 1. The side sheet 14 includes an outer surface 14a constituting the surface of the napkin 1 in the wing portion W and the rear flap portion F.
The side sheet 14 can be formed of a film such as a non-woven fabric or a resin. The side sheet 14 preferably has functions such as liquid impermeableness, water repellency, and moisture permeability, and may have a laminated structure or a single layer structure.

(Three-dimensional guard)
The three-dimensional guard G is composed of the side seat 14 in the present embodiment.
As shown in FIGS. 2 and 3, the three-dimensional guard G has a folded region 141, a fixed end portion 142, and an elastic member 143.

The folded area 141 is a portion of the side sheet 14 that is folded outward in the width direction.
The fixed end portion 142 is an end portion on the inner side in the width direction of the three-dimensional guard G, and is a base portion of the three-dimensional guard G joined to the first main surface 12a (surface sheet 12). The fixed end portion 142 is joined to the main surface 12a using the adhesive B in the present embodiment.

The elastic member 143 is arranged in the folded region 141 and includes a plurality of filamentous elastic members that can be expanded and contracted in the longitudinal direction in the present embodiment. The elastic member 143 is attached to the side sheet 14 stretched in the XY plane in a stretched state in the longitudinal direction. As a result, at the time of mounting, the elastic member 143 contracts in the longitudinal direction, the main body M bends so that the main surface 12a gently dents, and the folded region 141 can stand up in the thickness direction. The surface of the folded region 141 facing upward in the Z-axis direction is an upright surface that can come into contact with the wearer's skin.

As shown in FIG. 2, in the present embodiment, the three-dimensional guard G is arranged over the entire length in the longitudinal direction of the main body M, and at least a part thereof is configured to be able to stand upright.
The three-dimensional guard G has an upright region G1 and a non-upright region G2.
The upright region G1 is configured to be able to stand up in the thickness direction of the main body M. The upright region G1 is arranged across the intermediate region M2 up to a part of the front region M1 and the rear region M3.
The non-standing region G2 is arranged on the X-axis direction end side of the front region M1 and the rear region M3, and is joined to the outer surface 14a of the side sheet 14 in the Z-axis direction, for example, with the side sheet 14 folded back. As a result, the folded region 141 is configured not to stand in the non-standing region G2.

The elastic member 143 is actually arranged in the entire three-dimensional guard G including the non-upright region G2, but it may be arranged at least in the upright region G1. In FIG. 2, the elastic member 143 in the non-upright region G2 is not shown.

[Detailed configuration of absorbent core]
FIG. 4 is a plan view showing the absorbent core 20.
The absorbent core 20 has a front core portion 21 located in the front region M1, an intermediate core portion 22 located in the intermediate region M2, and a rear core portion 23 located in the rear region M3. More specifically, the intermediate core portion 22 extends from the rear side of the front region M1 to the front side of the rear region M3 via the intermediate region M2. The absorbent core 20 has a planar shape symmetrical in the width direction.

The absorbent core 20 has an intermediate core portion 22 having a narrow width and a constricted planar shape.
That is, the width D2 of the intermediate core portion 22 is narrower than the width D1 of the front core portion 21 and the width D3 of the rear core portion 23.
In this embodiment, the width D1 of the front core portion 21 and the width D3 of the rear core portion 23 are the same. However, the width D1 of the front core portion 21 and the width D3 of the rear core portion 23 may be different. Further, the widths of the front core portion 21 and the rear core portion 23 do not have to be uniform. In this case, the maximum dimensions in the width direction of the front core portion 21 and the rear core portion 23 can be the widths D1 and D3.

In the present embodiment, the intermediate core portion 22 has tapered portions 22a and 22b adjacent to the front core portion 21 and the rear core portion 23, respectively, and whose width increases toward the front core portion 21 and the rear core portion 23, respectively. There is. The tapered portions 22a and 22b may have a shape that is line-symmetrical with respect to the axis of symmetry parallel to the Y-axis direction, or may have an asymmetrical shape.

The intermediate core portion 22 includes a high basis weight portion 24 formed to have a higher basis weight and a higher thickness than other regions. In FIG. 4, the high basis weight portion 24 is shown by a dot pattern. The configuration of the high basis weight section 24 will be described later.

The absorbent core 20 further includes a vertical groove portion 25, a horizontal groove portion 26, and an annular groove portion 27. The vertical groove portion 25, the horizontal groove portion 26, and the annular groove portion 27 include a groove that sinks downward from the upper surface in the thickness direction of the absorbent core 20. The front core portion 21, the intermediate core portion 22, and the rear core portion 23 are each divided by these grooves. By providing the vertical groove portion 25, the horizontal groove portion 26, and the annular groove portion 27 that are easily deformed with a low basis weight, the flexibility of the absorbent core 20 can be enhanced.
The configuration of the vertical groove portion 25, the horizontal groove portion 26, and the annular groove portion 27 will be described later.

The narrow intermediate core portion 22 is formed over a predetermined length by a pair of constricted regions C.

The constricted region C is a spatial region located outside the tapered portions 22a and 22b of the absorbent core 20 whose width gradually narrows and the intermediate core portion 22 which is a narrow portion located between the tapered portions 22a and 22b. That is, the constricted region C is located outside the narrowly constricted portion of the absorbent core 20.
In the present embodiment, the core wrap sheet 30 covers the absorbent core 20 in a cylindrical shape and is configured to have substantially the same width along the longitudinal direction. Therefore, the constricted region C is partitioned by the inner surface of the intermediate core portion 22 and the core wrap sheet 30.

The material constituting the absorbent core 20 is substantially absent in the constricted region C. As a result, the region of the main body M including the constricted region C has a lower rigidity than the region including the absorbent core 20. That is, by providing the constricted region C, it is possible to provide a flexible region that is easily deformed by an external force on the widthwise peripheral edge of the intermediate region M2 of the main body M.
In addition, "substantially non-existent" includes an aspect in which small fragments such as fiber aggregates constituting the absorbent core 20 are present.

[Positional relationship between absorbent core, wing and three-dimensional guard]
FIG. 5 is a plan view of the napkin 1 showing the arrangement of the absorbent core 20, the three-dimensional guard G, and the wing portion W. In FIG. 5, the constricted area C is shown by a dot pattern.

The intermediate core portion 22 is located in the intermediate region M2 as described above and has a first length L1 along the longitudinal direction. The constricted region C is located on the outer side in the width direction of the intermediate core portion 22.

On the other hand, the wing portion W is arranged outside the constricted region C in the width direction and has a second length L2 shorter than the first length L1 of the intermediate core portion 22. The second length L2 of the wing portion W is the length in the longitudinal direction in the base portion Wa, and is typically the length of the longest portion in the wing portion W.
As a result, the entire area of the base Wa of the wing portion W faces the constricted region C.

The three-dimensional guard G is arranged on both sides in the width direction of the first main surface 12a, and extends in the longitudinal direction across the constricted region C. Here, "straddling the constricted region C" means that the fixed end portion 142 of the three-dimensional guard G passes above the constricted region C in the Z-axis direction and from above the Z-axis direction of the front core portion 21 to the rear core portion 23. It means that it extends upward in the Z-axis direction.

Further, the upright region G1 of the three-dimensional guard G has a third length L3 that is longer than the first length L1 of the intermediate core portion 22 in the longitudinal direction. That is, the upright region G1 passes over the constricted region C and extends from the front core portion 21 to the rear core portion 23. As a result, the entire area of the constricted region C is located below the upright region G1 in the Z-axis direction.

[Action effect]
In the napkin 1 of the present embodiment, since the highly rigid absorbent core 20 is not arranged in the region including the constricted region C of the main body M, the flexibility of the region can be enhanced. Therefore, when an external force is applied, the region including the constricted region C of the main body M is easily deformed and easily returns to the original shape, so that irreversible deep wrinkles and twists are unlikely to occur.
In the napkin 1, since the three-dimensional guard G straddles the constricted region C and is adhered to the main body M, it is adhered to the first main surface 12a which is smooth and has few wrinkles and twists on the constricted region C. Therefore, it is possible to prevent the three-dimensional guard G from forming wrinkles due to unevenness such as wrinkles on the first main surface 12a, and it is possible to stably stand the three-dimensional guard G in the Z-axis direction.

Further, since the constricted region C is located in the intermediate region M2 facing the excretion region of the wearer, it is possible to secure the standing stability of the portions facing both sides of the excretion region of the three-dimensional guard G by the above configuration. This makes it possible to effectively prevent the liquid from leaking to the outside of the main body M in the width direction.

Further, in the napkin 1, the wing portion W is formed shorter than the constricted region C, and the entire base portion Wa of the wing portion W is configured to face the constricted region C. As a result, the absorbent core 20 is not arranged from the base Wa of the wing portion W, which is the base point of bending, to the constricted region C. Therefore, when the wing portion W is folded back, the wing portion W is not caught up to the absorbent core 20 and folded back to deform the absorbent core 20, and the influence of the folded back of the wing portion W on the absorbent core 20 can be reduced.
Further, with the above configuration, the wing portion W can be folded deeper from the inside in the width direction than the base portion Wa. By folding back the wing portion W deeply, the fixed end portion 142 is pulled downward in the Z-axis direction, and the folded-back region 141 faces relatively upward in the Z-axis direction. Therefore, the three-dimensional guard G can be erected more stably.

Further, in the present embodiment, the standing region G1 is formed longer than the constricted region C. Therefore, the intermediate portion of the upright region G1 passes above the constricted region C in the Z-axis direction, and the longitudinal end portion of the upright region G1 is arranged on the relatively thick and rigid front core portion 21 and the rear core portion 23. Will be done. That is, in the upright region G1, the intermediate portion sinks in the thickness direction, while the end portion is pushed up in the thickness direction, so that the entire upright region G1 can be deeply curved. Therefore, the elastic member 143 can be easily contracted, and the standing stability of the standing region G1 can be further improved.

[Additional explanation of this embodiment]
Hereinafter, the description of this embodiment will be supplemented.

(Width of each part of absorbent core)
The widths D1 and D3 of the front core portion 21 and the rear core portion 23 are preferably 60 mm or more and 100 mm or less, and more preferably 70 mm or more and 90 mm or less.
The width D2 of the narrowest portion of the intermediate core portion 22 is preferably 40 mm or more and 75 mm or less, and more preferably 50 mm or more and 70 mm or less.

(Composition of high basis weight section)
The high basis weight portion 24 has a higher basis weight than the other areas and projects upward in the Z-axis direction as shown in FIG. In the present embodiment, the high basis weight portion 24 extends over the entire length in the longitudinal direction excluding the tapered portions 22a and 22b of the intermediate core portion 22. However, the high basis weight portion 24 may be shorter than the length in the longitudinal direction of the intermediate core portion 22 excluding the tapered portions 22a and 22b. Further, the high basis weight portion 24 may be longer than the length of the intermediate core portion 22 in the longitudinal direction excluding the tapered portions 22a and 22b, and further extends to at least one of the front core portion 21 and the rear core portion 23. May be.
By providing the high basis weight portion 24 facing the excretion area of the wearer at the time of wearing, the rigidity of the portion facing the excretion area can be increased. As a result, the portion is less likely to be deformed by an external force in the width direction applied at the time of mounting, the fit to the wearer can be improved, and leakage of the liquid in the longitudinal direction can be prevented. If the high basis weight portion 24 projects downward in the Z-axis direction instead of the form shown in FIG. 3, the convex structure protruding downward via the back surface sheet 13 when attached to the underwear is the annular groove portion 27. Since it is pushed upward in combination with the ease of deformation of the above, a fitting effect in the vicinity of the excretory portion similar to that protruding upward in the Z-axis direction can be obtained.

(Basis weight of absorbent core)
The basis weight of the absorbent core 20 excluding the vertical groove portion 25, the horizontal groove portion 26 and the annular groove portion 27 is preferably 100 g / m ² or more and 1000 g / m ² or less, and more preferably 150 g / m ² or more and 900 g / m ² or less. Is.
The basis weight of the high basis weight portion 24 is preferably 400 g / m ² or more and 1000 g / m ² or less, and more preferably 500 g / m ² or more and 900 g / m ² or less.

(Measuring method of basis weight of absorbent core)
The measurement target area of the absorbent core 20 is cut using a single-edged razor manufactured by Feather Co., Ltd. to obtain small pieces so as to have a predetermined area. The weight of these small pieces is measured using an electronic balance (A & D electronic balance GR-300, accuracy: 4 digits after the decimal point). Divide the obtained weight by the area of the small piece of each part to calculate the basis weight of the small piece. For each part, the average basis weight of 5 small pieces is defined as the basis weight.

(Structure of vertical groove, horizontal groove and annular groove)
The flutes 25 extend along the longitudinal direction and are spaced apart along the width direction. The vertical groove portion 25 is formed in each of the front core portion 21, the intermediate core portion 22, and the rear core portion 23 over the entire length in the longitudinal direction.
The lateral groove portions 26 extend along the width direction and are arranged at intervals along the longitudinal direction. The lateral groove portion 26 is formed in each of the front core portion 21, the intermediate core portion 22, and the rear core portion 23 over the entire length in the width direction.
By providing the vertical groove portion 25 and the horizontal groove portion 26, in addition to increasing the flexibility of the absorbent core 20, the liquid absorption rate of the absorbent core 20 is increased by drawing the liquid into the vertical groove portion 25 and the horizontal groove portion 26. be able to.

The annular groove portion 27 is formed along the outer edge of the high basis weight portion 24. By providing the annular groove portion 27 that is easily deformed with a low basis weight, the deformation around the high basis weight portion 24 is absorbed by the annular groove portion 27, so that the high basis weight portion 24 is less affected by the deformation of the surroundings. The "low basis weight" of each of the grooves 25, 26, and 27 is a concept including a form in which the material of the absorbent core 20 is present and a form in which the material of the absorbent core 20 is not present. In the form in which the material of the absorbent core 20 is present in each of the grooves 25, 26 and 27, the block-shaped portions of the absorbent core 20 located on both sides thereof are connected via the respective grooves 25, 26 and 27. It is more preferable because the liquid-absorbent core 29 is less likely to be twisted, broken, torn, etc. due to movement and can impart flexibility.

The configuration such as the shape and arrangement of the vertical groove portion 25, the horizontal groove portion 26, and the annular groove portion 27 is not limited to the configurations shown in FIGS. It can be set as appropriate based on. Further, in the napkin 1, the absorbent core 20 does not have to have at least one of the vertical groove portion 25, the horizontal groove portion 26, and the annular groove portion 27.

<Second embodiment>
In the first embodiment, a constricted region C is provided in the absorbent core 20 to increase the flexibility of the main body M, and a three-dimensional guard G is provided in this highly flexible region to prevent wrinkles of the three-dimensional guard G. did.
On the other hand, when the napkins are individually wrapped, the main body M and the three-dimensional guard G are folded for a long time. In this case, wrinkles of the main body M and the three-dimensional guard G are likely to be formed in the folded area. Therefore, by adjusting the relationship between the constricted area C and the folding position, wrinkles of the three-dimensional guard G due to individual packaging should be prevented. Can be done.
Therefore, in this embodiment, a preferable configuration in the package of the napkin will be described.
In this embodiment, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

[Absorptive article packaging (napkin packaging) and composition of napkin]
FIG. 6 is a plan view of the absorbent article package 40 of the present embodiment.
FIG. 7 is a plan view showing a developed mode of the absorbent article package 40.
The absorbent article package 40 is configured as a package in which a napkin is packaged, and is hereinafter referred to as a napkin package 40.

The napkin package 40 includes a napkin 1A and an exterior sheet 41. The napkin package 40 is packaged by the exterior sheet 41 in a state where the napkin 1A is folded along the longitudinal direction. As a result, the napkin package 40 is compact and less bulky, which makes it convenient to store and carry.
When the napkin package 40 shown in FIG. 6 is unfolded, as shown in FIG. 7, the laminated body 43 in which the napkin 1A is laminated on the exterior sheet 41 is obtained.
The napkin 1A includes a main body M similar to the napkin 1 of the first embodiment, a wing portion W, a three-dimensional guard G, and a release sheet 42 described later.

The exterior sheet 41 is a rectangular sheet material that extends along the XY plane and has the X-axis direction as the longitudinal direction. The exterior sheet 41 is selected from, for example, a film or a non-woven fabric made of polypropylene, polyester, polyethylene, polyvinyl alcohol, or the like.

The release sheet 42 is detachably attached to the main body adhesive portion 151 provided on the main surface 13a of the napkin 1A. The release sheet 42 is also a rectangular sheet material that extends along the XY plane and has the longitudinal direction as the longitudinal direction. The release sheet 42 has smaller length and width dimensions than the exterior sheet 41, and is arranged at the center of the exterior sheet 41 in the width direction.
As the peeling sheet 42, a sheet material that can be easily peeled off from the main body adhesive portion 151 of the napkin 1A can be used. The sheet material used for the release sheet 42 is selected from glassine paper, polyethylene film, release-treated high-quality paper, and the like. These sheet materials generally have higher rigidity than the exterior sheet 41.
It is preferable that the release sheet 42 is at least partially bonded with an adhesive, a heat seal, or the like in order to prevent the release sheet 42 from being separated from each other.

It is preferable that the release sheet 42 does not overlap with the upright surface at all when the upright surface of the pair of three-dimensional guards G is viewed in a plan view from the skin surface side, but if it is ½ or less of the width direction length of the upright surface. It may overlap. However, preferably, as shown in FIG. 7, the release sheet 42 has a width dimension D5 equal to or less than the facing width D4 of the pair of three-dimensional guards G. The facing width D4 of the pair of three-dimensional guards G means the dimension along the width direction between the fixed end portions 142 of the pair of three-dimensional guards G. As a result, the release sheet 42 is arranged so as not to substantially overlap with the three-dimensional guard G including the upright region G1 in the Z-axis direction.

FIG. 8 is a plan view showing a folding position when the laminated body 43 is folded in the longitudinal direction to produce the napkin package 40 shown in FIG. In FIG. 8, the position of the absorbent core 20 as seen from above in the Z-axis direction is shown by a broken line.

The main body M has three folding lines (folding lines) P1, P2, and P3 for packaging along the width direction.
The folding line P1 is provided in the forming region of the rear core portion 23 in the main body M.
The folding lines P2 and P3 are provided in the forming region of the intermediate core portion 22 in the main body M. The folding line P2 is provided closer to the rear of the intermediate core portion 22 in the X-axis direction, and the folding line P3 is provided closer to the front of the intermediate core portion 22 in the X-axis direction. The rear core portion 23 and the intermediate core portion 22 in the main body M are formed in the rear core portion 23 and the intermediate core portion 22 in the main body M when the main body M is viewed from the skin surface side in a plan view. It shall refer to the area where the skin is located.

The napkin package 40 shown in FIG. 6 can be manufactured by folding the laminated body 43 shown in FIG. 8 along the folding lines P1, P2, and P3 as follows. In the following description, the front end portion of the laminated body 43 in the X-axis direction is referred to as a front end portion 43a, and the rear end portion in the X-axis direction is referred to as a rear end portion 43b.

First, the rear end portion 43b of the laminated body 43 is folded forward along the folding line P1 by a valley fold. As a result, the rear regions M3 are folded over each other, and the rear regions M3 are folded in half.
Next, the folded portion of the laminated body 43 is further folded forward in the X-axis direction by a valley fold along the folding line P2. As a result, the rear region M3 in the folded state is folded over the intermediate region M2, and the folded state is set in three.
Then, the front end portion 43a of the laminated body 43 is folded back in the X-axis direction by a valley fold along the folding line P3, and the front region M1 is overlapped on the rear region M3 and the intermediate region M2 in the tri-folded state.

The adhesive tape 40a and the sealing portion 40b shown in FIG. 6 are provided on the laminated body 43 in the four-folded state, and the napkin package 40 is completed. The adhesive tape 40a fixes the end portion of the laminated body 43 on the front region M1 side to the exterior sheet 41 of the laminated body 43 in a tri-folded state. The sealing portion 40b joins both ends of the exterior sheet 41 in a four-folded state in the Y-axis direction so as to be peelable along the X-axis direction. The sealing portion 40b can be formed by a known joining method such as thermal embossing. In the napkin package 40, the folding structure shown in FIG. 6 is held by the adhesive tape 40a and the sealing portion 40b.
Actually, the laminated body 43 is folded in a state where the wing portion W and the rear flap portion F are folded back inward in the width direction with the wing adhesive portion 152 and the rear flap adhesive portion 153 turned upward in the Z-axis direction.

With the valley folding at the folding lines P1, P2, P3 of the main body M as described above, the three-dimensional guard G also has the folding lines P1, P2, P3 in a state where the folding area 141 is collapsed (a state in which the folding area 141 is in contact with the outer surface 14a). Folded in the valley at the position. The constricted region C is located below the Z-axis direction of the three-dimensional guard G in the folding lines P2 and P3 located in the intermediate region M2.

[Action effect]
The thick and highly rigid intermediate core portion 22 is substantially absent in the constricted region C. Therefore, when the valley is folded along the folding lines P2 and P3, a space corresponding to the thickness of the intermediate core portion 22 is formed on the folded constricted region C. As a result, the three-dimensional guard G bent along the folding lines P2 and P3 can be gently curved without being pressed in the Z-axis direction by the intermediate core portion 22. Therefore, the folding structure of the napkin package 40 makes it difficult for the three-dimensional guard G to have strong fold wrinkles, and the three-dimensional guard G can be stably erected when the napkin package 40 is opened and attached.

Further, as in the first embodiment, the flexibility of the main body M in the constricted region C can be increased. As a result, when folded along the folding lines P2 and P3 passing through the constricted region C, irreversible deep wrinkles and twists are formed in the regions on both sides of the main body M (main surface 12a) through which the folding lines P2 and P3 pass. It becomes difficult. Therefore, it is possible to prevent the three-dimensional guard G from forming wrinkles due to wrinkles or the like of the main body M, and to allow the three-dimensional guard G to stand up stably.

Further, the release sheet 42 generally has higher rigidity than the side sheet 14 and the exterior sheet 41, and once it has a crease, it does not easily return to its original shape.
In the present embodiment, the release sheet 42 is arranged so as not to overlap with the three-dimensional guard G in the Z-axis direction, or to be 1/2 or less of the width of the upright surface of the three-dimensional guard G in a plan view even if the release sheet 42 overlaps. Therefore, in the napkin package 40, it is possible to prevent the bent three-dimensional guard G from being pressed in the Z-axis direction due to the bending habit of the release sheet 42. Therefore, it is possible to prevent deep creases from being formed on the three-dimensional guard G, and it is possible to make the three-dimensional guard G stand up more stably.

Although each embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the gist of the present invention. For example, the embodiment of the present invention can be an embodiment in which each embodiment is combined.

The three-dimensional guard may be made of a sheet material for forming the three-dimensional guard, which is different from the side sheet. In this case, an elastic member is arranged on the sheet material, and the fixed end portion is adhered to the side sheet or the surface sheet.

The shape of the absorbent core is not limited to the shape shown in FIG. 4 and the like, and may have at least a narrow intermediate core portion. For example, the intermediate core portion may not include the tapered portion.
Further, the intermediate core portion may not have a high basis weight portion, and the absorbent core may have a basis weight distribution other than the high basis weight portion, the vertical groove portion, the horizontal groove portion and the annular groove portion.

The folding structure of the absorbent article package according to the present invention is not limited to the configuration shown in FIGS. 6 and 8, and at least one of the folding lines may pass over the constricted region. Therefore, the absorbent article package may have a tri-fold structure as well as a tri-fold structure as in the present embodiment, or may have a fold structure of five or more layers.

The laminate may optionally include additional configurations other than the exterior sheet and napkin.
For example, the laminate may include a release sheet on the napkin for covering the wing adhesive portion (see FIG. 3) and the rear flap adhesive portion. This makes it possible to prevent the wing adhesive portion and the rear flap adhesive portion protected by the release sheet from sticking to an unintended object and the adhesiveness from being lowered due to the adhesion of foreign matter.

Further, the exterior sheet of the absorbent article package according to the present invention may cover the absorbent article folded together with the release sheet, and may not be folded together with the absorbent article. As an example, the exterior sheet may be formed in a bag shape and may contain an absorbent article folded in a state where a release sheet is attached.

Furthermore, the absorbent article package according to the present invention can also be configured as a package for absorbent articles other than menstrual napkins. Examples of such absorbent articles include incontinence pads and vaginal discharge sheets.

1,1A ... Napkin (absorbent article)
11 ... Absorber 12 ... Front surface sheet 12a ... First main surface 13 ... Back surface sheet 13a ... Second main surface 15 ... Adhesive part 151 ... Main body adhesive part 20 ... Absorbent core 21 ... Front core part 22 ... Intermediate core part 23 ... Rear core part 24 ... High basis weight part 25 ... Vertical groove part 40 ... Napkin packaging (absorbent article packaging)
41 ... Exterior sheet 42 ... Peeling sheet M ... Main body M1 ... Front area M2 ... Intermediate area M3 ... Rear area C ... Constricted area G ... Three-dimensional guard W ... Wing part

Claims (3)

It has a first main surface configured by a front surface sheet and a second main surface on the opposite side of the first main surface composed of a back surface sheet, and has a first length by a pair of constricted regions. A main body containing an absorbent core having a longitudinal direction and a width direction, including a narrow intermediate core portion formed over the same.
A pair of wing portions arranged on the outer side in the width direction of the constricted region, having a second length shorter than the first length in the longitudinal direction, and facing each other in the width direction across the main body. ,
It includes a fixed end portion fixed on both sides of the first main surface in the width direction and a folded region folded outward from the fixed end portion in the width direction and not fixed to the first main surface. It is equipped with a pair of three-dimensional guards extending in the longitudinal direction across the constricted area.
The absorbent core is coated with a core wrap sheet.
The core wrap sheet extends from the intermediate core portion to the constricted region outside the width direction.
The pair of three-dimensional guards overlap with the core wrap sheet extending to the constricted region in a plan view, and are not folded inward in the width direction from the fixed end portion.
The main body has two wrapping lines along the width direction provided in the forming region of the intermediate core portion.
Absorbent article. The absorbent article according to claim 1.
The pair of three-dimensional guards are absorbent articles each having a second length longer than the first length in the longitudinal direction and having an upright region configured to be upright in the thickness direction of the main body. The absorbent article according to claim 1 or 2 .
The main body is
Further having an adhesive portion provided on the second main surface,
The absorbent article is
An absorbent article further comprising a release sheet that is detachably attached to the adhesive portion and has a width dimension equal to or less than the facing width of the pair of three-dimensional guards.

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