JP7806426B2 - absorbent articles - Google Patents

Description

The present invention relates to an absorbent article.

Absorbent articles that absorb liquids such as urine and bodily fluids are known (for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 2019-216796

Absorbent articles generally have three-dimensional gathers to prevent fluids excreted by the wearer from leaking across the width. Three-dimensional gathers prevent gaps from forming between the wearer's skin and the absorbent article by causing a liquid-impermeable sheet to rise up toward the skin side due to the elastic force of the elastic member, thereby preventing fluid leakage. However, while three-dimensional gathers prevent fluids from leaking across the widthwise edges of the absorbent article, they cannot prevent fluids from leaking across the longitudinal edges of the absorbent article. Absorbent articles have the problem of the risk of fluids leaking across the longitudinal edges.

The present invention aims to provide an absorbent article that can prevent liquid leakage.

To solve the above problem, the present invention provides a pocket sheet that forms a pocket portion on the longitudinal end side of the absorbent article, and multiple elastic members that are adhered to the pocket sheet in a stretched state.

Specifically, the present invention relates to an absorbent article that has a length along the longitudinal direction and a width along a width direction perpendicular to the longitudinal direction and is worn under the crotch of a wearer, and includes an absorbent body, a liquid-permeable skin-facing sheet that is arranged on the skin-facing side of the absorbent body, liquid-impermeable side sheets for forming three-dimensional gathers that are arranged on the outer side of the widthwise center, and a liquid-impermeable pocket sheet that is arranged on the skin-facing side of the side sheets at the longitudinal end portions, and is bonded to the side sheets at the widthwise end portions and is arranged on the skin-facing side of the side sheets at the longitudinal end portions. The device comprises a pocket sheet whose outer side is adhered to the skin-facing sheet and which forms a pocket portion whose inner side in the longitudinal direction is open; and a plurality of first elastic members which are adhered in a stretched state to the pocket sheet in an area overlapping the pocket portion so as to be stretchable in the width direction, the first elastic members being spaced apart in the longitudinal direction. In the pair of adjacent first elastic members, the shrinkage rate is lower at the portion where the first elastic member located on the inner side in the longitudinal direction is adhered than at the portion where the first elastic member located on the outer side in the longitudinal direction is adhered.

In the above-described absorbent article, the set of first elastic members may be composed of a first elastic member arranged at the outermost position in the longitudinal direction and a first elastic member arranged further inward in the longitudinal direction than the first elastic member.

In the above-mentioned absorbent article, the shrinkage rate may be greater in the portion to which the first elastic member is adhered that is positioned on the outer side in the longitudinal direction than in the portion to which the first elastic member is adhered that is positioned closest to the opening of the pocket portion.

The absorbent article may include a plurality of second elastic members that are attached in a stretched state to the pocket sheet in the region where the pocket sheet and the skin-facing sheet are attached so as to stretch in the width direction, the second elastic members being spaced apart from one another in the longitudinal direction, and each of the plurality of second elastic members having approximately the same stretch rate as the first elastic member that is arranged at the outermost position in the longitudinal direction.

In the above-described absorbent article, the side sheet has an elastic region in which an elastic member that stretches in the longitudinal direction is arranged, a free end portion that is the end portion that stands up toward the skin-facing side due to the elastic member, a base end portion that is bonded to the skin-facing sheet on the widthwise end side of the elastic region, a fixed end portion that is arranged contiguous with the base end portion on the longitudinal end side and is bonded to the skin-facing sheet, and a non-fixed end portion that is arranged inward in the width direction of the fixed end portion and contiguous with the elastic region on the longitudinal end side, and the pocket portion may overlap the non-fixed end portion.

This invention makes it possible to prevent liquid leakage.

FIG. 1 is a perspective view of a diaper according to an embodiment. FIG. 2 is an exploded perspective view of the diaper according to the embodiment. FIG. 3 is a cross-sectional view of a diaper according to an embodiment. FIG. 4 is a plan view of the diaper according to the embodiment, seen from the skin-facing side. FIG. 5 is a cross-sectional view of a diaper according to an embodiment.

The following describes diapers according to embodiments of the present invention with reference to the drawings. Note that the configurations of the following embodiments are examples, and the present invention is not limited to the configurations of these embodiments.

<Embodiment>
In this embodiment, the longitudinal direction of a tape-type disposable diaper (an example of an "absorbent article" in the present application, hereinafter simply referred to as "diaper") is the direction connecting the front body portion, which faces the wearer's abdomen, and the back body portion, which faces the wearer's back. Between the front body portion (one side in the longitudinal direction) and the back body portion (the other side in the longitudinal direction) (the center in the longitudinal direction), a crotch portion, which is positioned under the wearer's crotch (facing the crotch), is located. Furthermore, when the diaper is worn on a wearer (hereinafter abbreviated as "worn state"), the side facing the wearer's skin (the inner side when worn) is the skin-facing side, and the side opposite the skin-facing side (the outer side when worn) is the non-skin-facing side. Furthermore, the direction connecting the skin-facing side and the non-skin-facing side is the thickness direction, and the direction perpendicular to both the longitudinal direction and the thickness direction is the width direction. Furthermore, a view from the thickness direction is a planar view. The diaper 1 has a length along the longitudinal direction and a width along a width direction perpendicular to the longitudinal direction, and is fitted between the crotch of a wearer.

Fig. 1 is a perspective view of a diaper according to this embodiment. The diaper 1 has a crotch region 1B, which corresponds to the crotch area of the wearer and covers the genitals when worn, a front body region 1F, which is located in front of the crotch region 1B and corresponds to the front body of the wearer, and a back body region 1R, which is located behind the crotch region 1B and corresponds to the back body of the wearer. Tapes 2L and 2R are provided on both the left and right edges of the back body region 1R, and can be attached to front patches 2F provided on the non-skin-facing side (non-wearer side) of the front body region 1F. The diaper 1 has a front body region 1R.
When the tapes 2L and 2R are attached to the front patch 2F with the back body region 1R positioned on the back side of the wearer and the tape 2L is attached to the front patch 2F, the diaper 1 is secured to the wearer's body so as to surround the wearer's abdomen and thighs. Since the diaper 1 is secured to the wearer's body in this manner, the wearer can stand and walk while wearing the diaper 1.

The diaper 1 has an absorbent body, capable of absorbing and retaining liquid, located primarily near the crotch region 1B. To prevent gaps from forming between the diaper 1 and the wearer's skin that could serve as a liquid leakage path, the diaper 1 also has leg gathers 3AL, 3AR in areas surrounding the wearer's legs (thighs), three-dimensional gathers 3BL, 3BR located inward in the width direction of the diaper 1 from the leg gathers 3AL, 3AR, and waist gathers 3R in areas surrounding the wearer's abdominal circumference. The leg gathers 3AL, 3AR, three-dimensional gathers 3BL, 3BR, and waist gathers 3R adhere closely to the wearer's skin due to the elastic force of the elastic members. Therefore, liquid excreted from the wearer's genitals is absorbed by the absorbent body of the diaper 1 without leaking out. The elastic member may be selected from thread-like or strip-like rubber, etc., as appropriate.

Figure 2 is an exploded perspective view of the diaper 1. Figure 3 is a cross-sectional view of the diaper 1 when not worn, cut widthwise at the longitudinal center. The diaper 1 has a cover sheet 4 that forms the outer surface. The cover sheet 4 is a sheet-like member with a generally rectangular appearance, with constrictions 4KL and 4KR at the long sides, and forms the exterior surface of the diaper 1. The constrictions 4KL and 4KR are located in the areas where the wearer's thighs are located. The cover sheet 4 is provided to reinforce the back sheet 5 (described below) and to improve its feel. For example, to prevent leakage of excrement, a nonwoven fabric made of a liquid-impermeable thermoplastic resin can be used as the material. Examples of liquid-impermeable thermoplastic resins include polyethylene (PE) and polypropylene (PP). The cover sheet 4 is not limited to a single-layer structure, but may also be a multi-layer structure having an inner cover sheet and an outer cover sheet.

The diaper 1 comprises a backsheet 5 (an example of the "non-skin-facing sheet" herein), an absorbent body 6, and a topsheet 7 (an example of the "skin-facing sheet" herein), which are layered in this order on the skin-facing (wearer-facing) surface of the cover sheet 4. The backsheet 5, absorbent body 6, and topsheet 7 are all sheet-like members with a generally rectangular appearance, and are layered in this order on the cover sheet 4 with their longitudinal directions aligned with the longitudinal direction of the cover sheet 4. Like the cover sheet 4, the backsheet 5 is a sheet formed from a liquid-impermeable thermoplastic resin to prevent leakage of body waste. The backsheet 5 is preferably made of a material that is also breathable to prevent moisture buildup while the diaper is worn. The topsheet 7 is a sheet-like member that is placed on the skin-facing side of the wearer so as to cover the absorbent surface of the absorbent body 6. The topsheet 7 is liquid-permeable in part or in its entirety. Therefore, when the diaper 1 is worn, liquid excreted by the wearer passes through the top sheet 7, which may come into contact with the wearer's skin, into the absorbent body 6, and is absorbed therein. For example, woven fabric, nonwoven fabric, or porous film can be used as the material for the top sheet 7. The top sheet 7 may also be hydrophilic.

The back sheet 5, absorbent body 6, and top sheet 7 all extend from the front body region 1F to the back body region 1R. Therefore, when the wearer's genitals are covered with the cover sheet 4, which is made up of the back sheet 5, absorbent body 6, and top sheet 7 laminated together, the longitudinal ends of the back sheet 5, absorbent body 6, and top sheet 7 are positioned on the wearer's ventral and dorsal sides. In other words, the wearer's genitals are covered by the absorbent body 6 from the ventral to dorsal sides. Therefore, whether the wearer is facing belly down or back down when excreting liquid, the excreted liquid will come into contact with the absorbent body 6 via the top sheet 7.

The diaper 1 also includes elastic members 4SL, 4SR for forming the leg gathers 3AL, 3AR, which are provided between the cover sheet 4 and the back sheet 5 so as to be stretchable in the longitudinal direction of the diaper 1. The elastic members 4SL, 4SR are provided in an appropriate number (three in this embodiment) determined according to the elastic force (contractile force) required for the design of the diaper 1. As shown in Figure 4 (described later), the leg gathers 3AL, 3AR are arranged at both widthwise end portions of the crotch region 1B of the diaper 1, including the leg-around regions where the wearer's thighs are located.

The diaper 1 also has long, narrow, strip-shaped side sheets 8L, 8R. The side sheets 8L, 8R are liquid-impermeable (hydrophobic) sheets that are provided on the long sides of the top sheet 7 to form the upright gathers 3BL, 3BR. The side sheets 8L, 8R are positioned outboard of the widthwise center of the diaper 1. Similar to the cover sheet 4, the side sheets 8L, 8R have constrictions 8KL, 8KR in the areas where the wearer's thighs are located. The side sheets 8L, 8R also have elastic members 8EL, 8ER arranged along their longitudinal direction to form the upright gathers 3BL, 3BR. When the diaper 1 is worn, i.e., when the diaper 1 is U-shaped in side view, the contractile force of the elastic members 8EL, 8ER draws the side sheets 8L, 8R longitudinally, causing them to rise from the top sheet 7 and form the upright gathers 3BL, 3BR that prevent liquid leakage. In this way, the three-dimensional gathers 3BL, 3BR are formed three-dimensionally from the top sheet 7 toward the skin side (wearer side).

The cover sheet 4 is provided with an elastic member 4C, which prevents a gap from forming between the diaper 1 and the wearer's abdominal circumference, and is located inward in the width direction of the diaper 1 from the elastic members 4SL and 4SR, along the longitudinal direction of the diaper 1. The elastic member 4C is provided according to the elastic force (contractile force) required by the design of the diaper 1.

A pocket sheet 20 for forming the pocket is arranged on the rear body region 1R side of the diaper 1. The pocket sheet 20 has a double-layered structure formed by folding back a single sheet of material. The pocket sheet 20 is arranged closer to the skin than the side sheets 8L, 8R and is liquid-impermeable (hydrophobic). The pocket sheet 20 is arranged across the side sheets 8L, 8R on both sides. The pocket sheet 20 is adhered to the side sheets 8L, 8R at the widthwise end sides of the diaper 1.

Furthermore, the elastic members 9ER (an example of the "second elastic members" referred to herein) for forming the waist gathers 3R are located further back than the end of the absorbent body 6, within the double sheet structure of the pocket sheet 20, at a location where the non-skin-facing side of the pocket sheet 20 is adhered to the top sheet 7. The elastic members 9ER are oriented such that their longitudinal direction, which is the direction of stretch, is the width direction (left-right direction) of the diaper 1. Therefore, when the tapes 2L, 2R on both the left and right sides of the elastic members 9ER are adhered to the front patch 2F on the abdominal side of the wearer, the elastic members 9ER exert a contractile force to tightly fit the diaper 1 to the wearer and prevent the formation of a gap between the diaper 1 and the wearer's abdominal circumference. In this embodiment, the elastic members 9ER are made of rubber threads, and four of them are provided.

The elastic members 22ER are arranged within the double sheet structure of the pocket sheet 20, in areas where the non-skin-facing side of the pocket sheet 20 is not bonded to the top sheet 7. The elastic members 22ER (an example of the "first elastic members" referred to in this application) are arranged so that their longitudinal direction, which is the direction of stretch, is the width direction (left-right direction) of the diaper 1. The elastic members 22ER exert a contractile force to bring the pocket sheet 20 into close contact with the wearer and prevent gaps from forming between the pocket sheet 20 and the wearer's back. In this embodiment, the elastic members 22ER are rubber threads, and five of them are provided.

The absorbent body 6 has a structure in which granular absorbent resin such as SAP (Super Absorbent Polymer), a hydrophilic polymer with a cross-linked structure that can absorb and retain water, is held in the gaps between fibers that have been hydrophilically treated, such as cellulosic fibers like pulp fibers, rayon fibers, or cotton fibers, or synthetic fibers like polyethylene, polypropylene, or polyethylene terephthalate. Therefore, in the absorbent body 6, the volumetric change of the absorbent resin before and after absorbing liquid basically occurs within the short fibers that hold the absorbent resin in the gaps. Therefore, when viewed as a whole, it can be said that the expansion rate of the absorbent body 6's thickness after absorbing liquid is not as great as the expansion rate of the absorbent resin itself.

In this embodiment, SAP particles refer to a granular resin composition containing SAP. The term "SAP-containing resin composition" as used herein encompasses both compositions consisting solely of SAP and compositions containing SAP as the main component, with other substances contained to the extent that they do not adversely affect water absorption. Examples of "other substances" include additives (such as surface modifiers added to make the particle surface hydrophobic), unreacted monomers remaining during the synthesis of SAP, etc.

Figure 4 is a plan view of the diaper 1 in a stretched state, viewed from the skin-facing side. The elastic members 4C, 4SL, and 4SR are not shown in Figure 4. As shown in Figure 4, the side sheets 8L and 8R used to form the upright gathers 3BL and 3BR have elastic regions 10L and 10R in which elastic members 8EL and 8ER that stretch in the longitudinal direction of the diaper 1 are disposed, and free end portions 11L and 11R that are the ends that stand up toward the skin-facing side due to the elastic members 8EL and 8ER. The elastic regions 10L and 10R extend from the elastic members 8EL and 8ER to the base end portions 12L and 12R, which will be described later. The longitudinal directions of the elastic regions 10L and 10R and the free end portions 11L and 11R coincide with the longitudinal direction of the diaper 1.

The side sheets 8L, 8R also have base ends 12L, 12R that are bonded to the top sheet 7 on the widthwise edge side of the elastic regions 10L, 10R. The base ends 12L, 12R form the rising lines when the elastic regions 10L, 10R rise toward the skin side. The longitudinal direction of the base ends 12L, 12R coincides with the longitudinal direction of the diaper 1.

The side sheets 8L, 8R also have fixed end portions 13L, 13R that are arranged so as to be continuous with the base end portions 12L, 12R at both longitudinal end portions of the diaper 1. The fixed end portions 13L, 13R are adhered to the top sheet 7 and are arranged closer to both longitudinal end portions of the diaper 1 than the base end portions 12L, 12R.

The side sheets 8L, 8R also have non-fixed end portions 14L, 14R arranged contiguous with the elastic regions 10L, 10R at both longitudinal end portions of the diaper 1. The non-fixed end portions 14L, 14R are arranged more inward in the width direction of the diaper 1 than the fixed end portions 13L, 13R. No elastic members are arranged at the non-fixed end portions 14L, 14R, and the non-fixed end portions 14L, 14R are regions where no elastic force is generated by the elastic members. The elastic members 8EL, 8ER may extend to the non-fixed end portions 14L, 14R without being adhered thereto. Even in this case, no elastic force is generated by the elastic members 8EL, 8ER at the non-fixed end portions 14L, 14R.

In the diaper 1, the elastic regions 10L, 10R are raised by the force of the elastic members 8EL, 8ER contracting toward the center in the longitudinal direction. At this time, the elastic force of the elastic members 8EL, 8ER is also transmitted to the non-fixed end portions 14L, 14R, causing the non-fixed end portions 14L, 14R to rise toward the skin-facing side, separated by the fixed end portions 13L, 13R. In this manner, the fixed end portions 13L, 13R serve as the rising lines when the non-fixed end portions 14L, 14R rise toward the skin-facing side. As a result, in the diaper 1 according to this embodiment, the non-fixed end portions 14L, 14R rise toward the skin-facing side at both longitudinal ends where the elastic members 8EL, 8ER for the upright gathers 3BL, 3BR are not provided, and these non-fixed end portions 14L, 14R prevent leakage of liquid. Specifically, the non-fixed end portions 14L, 14R receive moisture contained in urine and feces (watery stool) to prevent leakage of liquid. As a result, the diaper 1 according to this embodiment can suppress leakage of liquid.

In addition, in this embodiment, the elastic regions 10L, 10R and the non-fixed ends are approximately the same length in the width direction of the diaper 1. The non-fixed ends 14L, 14R, which are on extensions of the elastic regions 10L, 10R, have substantially the same width as the elastic regions 10L, 10R. Therefore, the force with which the elastic members 8EL, 8ER pull the elastic regions 10L, 10R inward in the longitudinal direction is efficiently transmitted to the non-fixed ends 14L, 14R. This makes it easier for the non-fixed ends 14L, 14R of the diaper 1 to rise toward the skin.

In this embodiment, the three-dimensional gathers 3BL, 3BR can be seen as being composed of elastic regions 10L, 10R, free ends 11L, 11R, base ends 12L, 12R, fixed ends 13L, 13R, and non-fixed ends 14L, 14R.

Also, as shown in Figure 4, a pocket sheet 20 for forming a pocket portion is arranged on the rear body region 1R side of the diaper 1.

Figure 5 is a cross-sectional view of the diaper 1 taken along line AA in Figure 4. The pocket sheet 20 is adhered to the top sheet 7 on the longitudinal outer side (back side) of the diaper 1, and forms a pocket portion 21 that is open on the longitudinal inner side (crotch side). The pocket portion 21 is provided to prevent liquid from leaking from the back side (the rear body region 1R side) of the wearer.

The pocket base end (innermost portion) 21E of the pocket portion 21 is located toward the back side relative to the end of the absorbent body 6. The pocket portion 21 prevents liquid that flows outward in the longitudinal direction from the end of the absorbent body 6 from leaking from the back side. This allows the diaper 1 according to this embodiment to prevent liquid from leaking from the rear body region 1R side (back side). In addition, because the pocket portion 21 is positioned overlapping the liquid-impermeable backsheet 5 in a plan view, liquid that accumulates in the pocket portion 21 does not leak from the non-skin-facing side.

5 , the pocket sheet 20 has a double sheet structure, being folded back on both the longitudinal outer side and the longitudinal inner side of the diaper 1. Within the pocket portion 21, the portion of the pocket sheet 20 that is not adhered to the top sheet 7 is further folded back from the pocket base end portion 21E, so that the portion that is adhered to the top sheet 7 is exposed to the inside of the pocket portion 21. This makes it easier to open the opening side of the pocket portion 21.

Here, the pocket portion 21 overlaps the unfastened ends 14L, 14R on the rear body region 1R side. As described above, when the diaper 1 is worn, the unfastened ends 14L, 14R rise toward the skin. As the unfastened ends 14L, 14R rise toward the skin, the pocket sheet 20 on the pocket portion 21 also rises toward the skin. This allows the opening of the pocket portion 21 of the diaper 1 to be opened, making it easier to introduce liquid excreted by the wearer into the pocket portion 21. Generally, three-dimensional gathers are required to adhere closely to the skin in order to prevent side leakage caused by the top sheet separating from the skin in the crotch area of the diaper 1. Therefore, the three-dimensional gathers are not required to rise toward the skin at the longitudinal ends of the diaper, i.e., the ventral and dorsal sides. In the diaper 1 according to this embodiment, the unfastened ends 14L, 14R rise toward the skin in order to open the pocket portion 21 even at the longitudinal ends, i.e., the dorsal side. As a result, the diaper 1 according to this embodiment can prevent liquid from leaking from the back side.

The diaper 1 according to this embodiment also includes a plurality of elastic members 22ER that are adhered in a stretched state to the pocket sheet 20 in the region that overlaps with the pocket portion 21 when the diaper 1 is viewed in plan, so as to be stretchable in the width direction of the diaper 1. The plurality of elastic members 22ER are spaced apart from one another in the longitudinal direction of the diaper 1.

The diaper 1 according to this embodiment has a pair of adjacent elastic members 22ER, in which the region where the elastic member 22ER located on the inner side of the diaper 1 is bonded has a lower shrinkage rate than the region where the elastic member 22ER located on the outer side of the diaper 1 is bonded. This pair of elastic members 22ER may be any two adjacent elastic members among the five elastic members 22ER. For example, in this embodiment, this pair of elastic members 22ER is composed of the elastic member 22ER located on the outermost side of the diaper 1 in the longitudinal direction and the elastic member 22ER located on the inner side of the elastic member 22ER in the longitudinal direction. The shrinkage rate can be adjusted by the elastic modulus of each elastic member 22ER and the elongation rate when bonded.

Here, if the shrinkage rate is X, the widthwise length of the pocket sheet 20 of the diaper 1 in its natural state is A, and the widthwise length of the pocket sheet 20 when the diaper 1 is stretched in the widthwise direction without wrinkles is B, X can be calculated using the following formula (1).
X (%)=A/B×100...(1)

If the pocket sheet 20 on the opening side of the pocket portion 21 were in contact with the top sheet 7, the opening of the pocket portion 21 would be narrowed, making it difficult for liquids such as urine to penetrate into the pocket portion 21. Because the pocket sheet 20 is liquid-impermeable to block liquids, for example, if the pocket sheet 20 on the opening side of the pocket portion 21 were in close contact with the top sheet 7, liquid would run up onto the skin-facing side of the pocket sheet 20 and leak out from the back body region 1R.

However, in the diaper 1 according to this embodiment, the region where the elastic member 22ER on the longitudinal inner side of the diaper 1 is arranged contracts more than the region where the elastic member 22ER on the longitudinal outer side of the diaper 1 is arranged, causing the longitudinally inner region to ride up closer to the skin than the longitudinally outer region. This creates a gap between the opening of the pocket portion 21 and the top sheet 7, allowing the opening of the pocket portion 21 to be opened wider. In the diaper 1 according to this embodiment, by opening the opening of the pocket portion 21 wider, liquid can easily enter the pocket portion 21, thereby preventing liquid from leaking from the rear body region 1R.

In addition, in the diaper 1 according to this embodiment, the shrinkage rate is greater in the area where the elastic members 22ER located on the longitudinal outer side of the diaper 1 are adhered than in the area where the elastic members 22ER located closest to the opening of the pocket portion 21 are adhered. As a result, the area on the longitudinal outer side of the diaper 1 shrinks more than the opening of the pocket portion 21, forming a gap between the opening of the pocket portion 21 and the top sheet 7, allowing the opening of the pocket portion 21 to be opened widely.

<Other embodiments>
Next, other embodiments will be described. In the above embodiment, a tape-type disposable diaper has been described as an example, but the present invention is not limited to this and can also be applied to absorbent articles such as pants-type disposable diapers and absorbent pads.

In addition, in the above embodiment, the fixed ends 13L, 13R and the non-fixed ends 14L, 14R are provided at both longitudinal ends of the diaper 1 (front body region 1F and back body region 1R), but they may be provided at either longitudinal end.

In addition, in the above embodiment, the pocket sheet 20 is positioned in the back body region 1R, but it may also be positioned in the front body region 1F, or in both the front body region 1F and the back body region 1R.

In addition, in the above embodiment, the top sheet 7 is composed of a single layer of sheet material, but the present invention is not limited to this. For example, the top sheet 7 may be composed of two or more layers of sheet material. For example, when the top sheet 7 is composed of two layers of sheet material, the side sheets 8L, 8R may be adhered to the lower sheet material, or to both sheet materials.

The absorbent body 6 may also be wrapped in a core wrap sheet. The core wrap sheet is a water-permeable sheet made of a nonwoven fabric formed from pulp fibers such as tissue paper or thin resin fibers. It covers the entire absorbent body 6, maintaining the shape of the absorbent body 6 and preventing the SAP particles from scattering into other structures. Because the core wrap sheet is water-permeable, it does not impede the movement of urine from the skin-facing side to the absorbent body 6.

The embodiments and variations disclosed above can be combined with each other.

DESCRIPTION OF SYMBOLS 1....Diaper 1B....Crotch region 1F...Front body region 1R....Back body region 2F....Front patch 2L, 2R....Tapes 3BL, 3BR....3D gathers 3R....Waist gathers 4....Cover sheet 4KL, 4KR....Constrictions 4C, 4SL, 4SR, 8EL, 8ER, 9ER, 22ER....Elastic member 5....Back sheet 6....Absorbent body 7....Top sheet 8L, 8R....Side sheet 10L, 10R....Elastic region 11L, 11R....Free end portion 12L, 12R....Base end portion 13L, 13R....Fixed end portion 14L, 14R....Non-fixed end portion 20....Pocket sheet 21....Pocket portion 21E....Pocket base end portion

Claims (5)

An absorbent article having a length along a longitudinal direction and a width along a width direction perpendicular to the longitudinal direction, the absorbent article being worn between the crotch areas of a wearer,
An absorber;
a skin-facing sheet having liquid permeability and arranged on the skin-facing side of the absorbent body;
A liquid-impermeable side sheet for forming three-dimensional gathers, the side sheet being arranged on the outer side in the width direction than the center in the width direction;
a liquid-impermeable pocket sheet disposed closer to the skin side than the side sheet at the longitudinal end, the pocket sheet being bonded to the side sheet at the width end, the longitudinal outer side being bonded to the skin-facing sheet, and the longitudinal inner side being an open pocket;
a plurality of first elastic members bonded in a stretched state to the pocket sheet in an area overlapping the pocket portion so as to be stretchable in the width direction, the first elastic members being spaced apart from one another in the longitudinal direction;
Equipped with
a pair of adjacent first elastic members, in which a portion to which the first elastic member arranged on the inner side in the longitudinal direction is adhered has a lower shrinkage rate than a portion to which the first elastic member arranged on the outer side in the longitudinal direction is adhered;
The pocket sheet is folded back on the outer side and the inner side in the longitudinal direction, and the adhesive portion between the pocket sheet and the skin-facing sheet is exposed to the inside of the pocket portion.
Absorbent articles. The set of first elastic members is composed of the first elastic member disposed on the outermost side in the longitudinal direction and the first elastic member disposed on the inner side of the first elastic member in the longitudinal direction.
The absorbent article of claim 1. a shrinkage rate of a portion of the pocket to which the first elastic member is bonded, which is disposed on the outer side in the longitudinal direction, is greater than a shrinkage rate of a portion of the pocket to which the first elastic member is bonded, which is disposed on the closest side to the opening of the pocket;
The absorbent article according to claim 1 or 2. In the region where the pocket sheet and the skin-facing sheet are bonded, a second elastic member is bonded in a stretched state to the pocket sheet so as to be stretchable in the width direction, and the second elastic member is a plurality of second elastic members arranged spaced apart from each other in the longitudinal direction.
The absorbent article according to any one of claims 1 to 3. The side sheet is
an elastic region in which an elastic member that stretches in the longitudinal direction is disposed;
a free end portion that is an end portion that stands up toward the skin surface side by the elastic member;
a base end portion bonded to the skin-facing side sheet at a position closer to the end portion in the width direction than the elastic region;
a fixed end portion arranged so as to be continuous from the base end portion at the end portion in the longitudinal direction, the fixed end portion being adhered to the skin-facing side sheet;
a non-fixed end portion disposed on the inner side of the fixed end portion in the width direction and continuous with the elastic region on the end portion side in the longitudinal direction;
and
The pocket portion overlaps the non-fixed end portion.
The absorbent article according to any one of claims 1 to 4.