JP7600770B2 - Absorbent articles - Google Patents

Description

The present invention relates to an absorbent article.

Conventionally, there are known absorbent articles such as disposable diapers that rapidly guide excreted urine and bodily fluids into an absorbent body for absorption. However, absorbent bodies are designed to absorb liquids, and when excreted stool is soft or watery, the absorbent body is unable to absorb the solid content.

As a result, soft or watery stool remains on the skin-facing side of the diaper for a long time, affecting the comfort of the absorbent article when worn. Furthermore, if soft or watery stool remains on the surface of the diaper for a long time, there is a risk that the wearer's movements will cause it to leak out of the diaper beyond the three-dimensional gathers and other biasing elements.

There is a known technology that provides pleats in the center sheet, and while the pleats hold back the waste, they guide the moisture contained in the soft or watery stool into the absorbent body, preventing it from leaking out of the biasing body (Patent Document 1).

JP 2017-29597 A

This makes it easier for the absorbent to absorb moisture contained in the waste, preventing the waste from leaking out of the actuator.

To solve the above problem, a sheet containing an urging body is raised from the non-skin-facing side of the diaper, and while waste is contained between the sheet and the absorbent body, moisture is absorbed from the sides of the absorbent body, preventing leakage.

Specifically, the present invention is an absorbent article comprising an absorbent body placed under the crotch of a wearer, a water-permeable center sheet covering the skin-facing side of the absorbent body, a water-impermeable back sheet covering the non-skin-facing side of the absorbent body, and a sheet formed by joining a plurality of elastic bodies parallel to the longitudinal direction of the absorbent body and biased into pleats by the bias of the plurality of elastic bodies, the sheet biased into pleats being adhered to the non-skin-facing side of the absorbent body and rising up the sides of the absorbent body toward the skin-facing side.

The other end of the sheet that is forced into a pleated shape can be a free end.

An elastic body can be attached to the other end of the sheet that is forced into pleats, allowing it to be closely attached to the wearer's skin.

The center sheet and the back sheet can also be joined at the widthwise end of the absorbent body, with the joined end facing outward in the widthwise direction, and not joined to the sheet that is biased into the pleated shape at the joined end.

The center sheet and the back sheet can also be joined by extending outward in the width direction of the absorbent body without being bent along the side of the absorbent body.

The center sheet may extend to the non-skin facing side of the absorbent body and be joined to the back sheet and the pleated sheet.

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 schematic diagram showing the diaper according to the embodiment in an unfolded and stretched state. FIG. 4 is a cross-sectional view of the diaper according to the embodiment taken along line AA. FIG. 5 is a cross-sectional view of an alternative structure. FIG. 6 is a cross-sectional view of an alternative structure. FIG. 7 is a cross-sectional view of an alternative structure.

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>
1 is a perspective view of a pants-type disposable diaper (hereinafter simply referred to as a "diaper") according to the present embodiment. Terms relating to directions used in this application refer to directions that correspond to the front, back, left and right of a wearer when the diaper 1 is worn by the wearer. For example, the left-right direction in this application refers to a direction that corresponds to the left and right of a wearer when the diaper 1 is worn by the wearer.

In this embodiment, as an example of an absorbent article, a pants-type disposable diaper having a tubular structure with an opening for the wearer's abdominal circumference and a pair of left and right openings through which the wearer's left and right lower legs are inserted is exemplified, but the "absorbent article" in this application is not limited to pants-type disposable diapers. The "absorbent article" in this application includes various types of absorbent articles that can wrap around the abdominal circumference and crotch area, such as a tape-type disposable diaper in which a tubular structure is formed by attaching a tape fixed near one end of a sheet-like member that covers the wearer's crotch area (genitals) from the front to the back of the body to the other end of the sheet-like member.

The diaper 1 has a crotch region 1B, which is a region corresponding to the crotch region covering the wearer's pubic region (crotch) when worn, a front body region 1F, which is a region corresponding to the front body in the wearer's waist and covers the wearer's abdominal side, and a rear body region 1R, which is a region corresponding to the rear body in the wearer's waist and covers the wearer's back side. Here, the front body region 1F is located in front of the crotch region 1B, and the rear body region 1R is located behind the crotch region 1B. Since the diaper 1 in this embodiment is a pants-type disposable diaper, the left edge of the front body region 1F and the left edge of the rear body region 1R are joined to each other, and the right edge of the front body region 1F and the right edge of the rear body region 1R are joined to each other. Thus, in the diaper 1, a waist opening 2T is formed by the upper edge of the front body region 1F and the upper edge of the rear body region 1R. The diaper 1 has a left lower leg opening 2L formed in a portion on the left side of the crotch region 1B where the above-mentioned joining is not performed, and a right lower leg opening 2R formed in a portion on the right side of the crotch region 1B. When the diaper 1 is put on such that the wearer's left lower leg is inserted through the left lower leg opening 2L, the wearer's right lower leg is inserted through the right lower leg opening 2R, and the wearer's torso is inserted into the torso opening 2T, the front body region 1F is disposed on the wearer's abdomen side, the rear body region 1R is disposed on the wearer's back side, and the left lower leg opening 2L and the right lower leg opening 2R are fixed to the wearer's body in a state in which they surround the wearer's thighs. Since the diaper 1 is fixed to the wearer's body in this manner, the wearer can stand and walk while wearing the diaper 1.

In the diaper 1, an absorbent capable of absorbing and retaining liquid is mainly arranged near the crotch region 1B. In addition, in order to prevent the formation of gaps between the diaper 1 and the wearer's skin that can serve as a liquid outflow path, the diaper 1 is provided with leg gathers 3AL, 3AR in the area surrounding the wearer's legs (thighs), three-dimensional gathers 3BL, 3BR are provided on the inside of the leg gathers 3AL, 3AR in the width direction of the diaper 1, and a waist gather 3R is provided in the area surrounding the wearer's abdominal circumference. The leg gathers 3AL, 3AR, three-dimensional gathers 3BL, 3BR, and waist gather 3R are in close contact with the wearer's skin by the elastic force of the elastic member. Therefore, bodily fluids discharged from the wearer's genitals are absorbed by the absorbent of the diaper 1 without leaking out of the diaper 1. Note that thread-like or strip-like rubber can be appropriately selected as the elastic member.

Figure 2 is an exploded perspective view of the diaper 1. Figure 3 is a schematic diagram of the diaper 1 according to the embodiment in an unfolded and stretched state. Figure 3 is a schematic plan view of the diaper 1 in an unfolded and stretched state.

The diaper 1 has cover sheets 4F, 4R and a pad cover sheet 6 that form the outer surface when worn by a wearer. The cover sheet 4F mainly forms the outer surface of the front body region 1F of the diaper 1. The pad cover sheet 6 mainly forms the outer surface of the crotch region 1B of the diaper 1. The cover sheet 4R mainly forms the outer surface of the rear body region 1R of the diaper 1. The cover sheets 4F, 4R and the pad cover sheet 6 are provided to reinforce the outer surface of the diaper 1 and improve the feel. For example, in order to suppress 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 liquid-impermeable sheet may have a large number of fine holes of about 0.1 to several μm formed therein so as to exhibit liquid impermeability and moisture permeability.

The diaper 1 also has an inner coversheet 5F laminated on the wearer-facing surface of the coversheet 4F, and an inner coversheet 5R laminated on the wearer-facing surface of the coversheet 4F. The inner coversheet 5F is a sheet-like member having a shape that matches the portion of the coversheet 4F that is closer to the crotch region 1B than the fold-back line 4F6 described below. Like the inner coversheet 5F, the inner coversheet 5R is also a sheet-like member having a shape that matches the portion of the inner coversheet 5R that is closer to the crotch region 1B than the inner coversheet 5F6 described below.

The diaper 1 also has a back sheet 7, an absorbent 8, and a center sheet 9, which are laminated in this order on the wearer-side surface of the pad cover sheet 6. The pad cover sheet 6 is a substantially rectangular sheet having a length in the longitudinal direction that extends from the front body of the wearer to the back body via the crotch and a predetermined width in the width direction perpendicular to the longitudinal direction. The back sheet 7, the absorbent 8, and the center sheet 9 are all sheet-like members having a substantially rectangular appearance like the pad cover sheet 6, and are laminated in this order on the pad cover sheet 6 with their longitudinal directions coinciding with the longitudinal direction of the pad cover sheet 6. The back sheet 7 is a sheet formed of a liquid-impermeable thermoplastic resin material to suppress leakage of excrement. The center sheet 9 is a sheet-like member that is comfortable to the touch and is disposed on the skin side of the wearer so as to cover the water-absorbing surface of the absorbent 8. The center sheet 9 is liquid-permeable in part or in whole. Therefore, when the diaper 1 is worn, liquid excreted by the wearer passes through the center sheet 9, which may come into contact with the wearer's skin, and enters the absorbent body 8, where it is absorbed. Examples of liquid-permeable sheets include woven fabrics, nonwoven fabrics, and porous films. The center sheet 9 may also be hydrophilic.

The absorbent body 8 has a structure in which granular absorbent resin such as a hydrophilic superabsorbent polymer having a cross-linked structure capable of absorbing and retaining water is held in the gaps between short fibers of cellulosic fibers such as pulp fibers, rayon fibers, or cotton fibers, or between short fibers of synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate that have been hydrophilized. Thus, when the absorbent body 8 absorbs liquid excreted from the wearer, the absorbent resin held in the gaps in the short fibers swells to hold the liquid in the short fibers. The absorbent body 8 has a substantially flat plate shape. The absorbent body 8 may have a single-layer structure consisting of one mat, or a laminated structure in which multiple mats are stacked. The absorbent body 8 may have an appropriate shape according to the purpose. Examples of the shape of the absorbent body 8 include a rectangular shape, an hourglass shape with a narrowed center, and various other shapes. The absorbent body 8 may be wrapped in a core wrap sheet made of thin water-permeable paper such as tissue paper. By wrapping it in a core wrap sheet, the granular absorbent resin can be prevented from leaking into other sheets.

The back sheet 7, absorbent body 8, and center sheet 9 all extend from the front body region 1F to the rear body region 1R. Therefore, when the wearer's private parts (crotch area) are covered with the pad cover sheet 6 on which the back sheet 7, absorbent body 8, and center sheet 9 are layered, both ends in the longitudinal direction of the back sheet 7, absorbent body 8, and center sheet 9 are located on the wearer's ventral side and back side. In other words, the wearer's private parts are covered by the absorbent body 8 from the wearer's ventral side to the back side. Therefore, whether the wearer is in a ventral or back-facing position when excreting fluid, the excreted body fluid will in principle come into contact with the absorbent body 8 via the center sheet 9.

The diaper 1 also has long, narrow, strip-like side sheets 10L, 10R for forming the above-mentioned three-dimensional gathers 3BL, 3BR. The side sheets 10L, 10R are provided in the vicinity of and parallel to the long sides of the center sheet 9. Rubber threads 10L1, 10R1 are arranged in the longitudinal direction of the side sheets 10L, 10R. Thus, in the side sheets 10L, 10R, an edge 4F7 of the cover sheet 4F forming the left edge of the front body region 1F is joined to an edge 4R7 of the cover sheet 4R forming the left edge of the back body region 1R, and an edge 4F8 of the cover sheet 4F forming the right edge of the front body region 1F is joined to an edge 4R8 of the cover sheet 4R forming the right edge of the back body region 1R, so that when the diaper 1 is completed as shown in Fig. 1, the elastic threads 10L1, 10R1 are pulled in the longitudinal direction by the contractile force thereof and rise from both sides of the absorbent body 8 along the fold-back lines 10L2, 10R2. As a result, three-dimensional gathers 3BL, 3BR are formed which prevent liquid from leaking out from the left lower leg opening 2L and the right lower leg opening 2R. The method of joining edge 4F7 of cover sheet 4F and edge 4R7 of cover sheet 4R, and edge 4F8 of cover sheet 4F and edge 4R8 of cover sheet 4R is not particularly limited, but can be performed by, for example, heat sealing, high frequency sealing, ultrasonic sealing, etc.

The diaper 1 also has an air passage forming sheet 11F laminated on the wearer side surface of the cover sheet 4F, sandwiching the pad cover sheet 6, the back sheet 7, the absorbent 8, the center sheet 9, and the side sheets 10L and 10R, and an air passage forming sheet 11R laminated on the wearer side surface of the cover sheet 4R. The air passage forming sheet 11F is laminated on the cover sheet 4F at one end side in the longitudinal direction of the center sheet 9. The air passage forming sheet 11R is laminated on the cover sheet 4R at the other end side in the longitudinal direction of the center sheet 9. In the present application, the state in which the sheets are overlapped is not limited to a state in which the overlapped sheets are in full contact with each other, but is a concept including a state in which parts of the sheets are overlapped. For example, the air passage forming sheet 11F is laminated in a state in which a part of one end side in the longitudinal direction of the pad cover sheet 6 touches a part of the cover sheet 4F.

In the air passage forming sheet 11F, a large number of minute ventilation holes 11F1 for ventilation are arranged in an area extending in the left-right direction along the upper edge of the front body region 1F. In the air passage forming sheet 11R, a large number of ventilation holes 11R1 are arranged, similar to the air passage forming sheet 11F. Here, the ventilation hole means an opening that communicates the space on one side of the sheet with the space on the other side, and its shape is not particularly limited. Therefore, as the ventilation holes 11F1, 11R1, for example, openings having a circular shape, an elliptical shape, a polygonal shape (triangle, square, etc.) or the like can be applied. The formation of the ventilation holes 11F1, 11R1 in the air passage forming sheet 11F, 11R does not mean that the air passage forming sheet 11F, 11R is made of a material that has no breathability, and the air passage forming sheet 11F, 11R may be made of a material that has breathability or a material that does not have breathability. The air passage forming sheets 11F, 11R are preferably made of a material having air permeability and liquid permeability, but may be made of, for example, a material having no air permeability. The size and number of the air holes 11F1, 11R1 are not particularly limited, but for example, it is preferable to form about 5 to 200 holes with an opening area of 0.5 to 10 ^mm2 .

As described above, the diaper 1 is formed by stacking the cover sheets 4F, 4R, the air passage forming sheets 11F, 11R, the pad cover sheet 6, and the side sheets 10L, 10R, in addition to the back sheet 7 and center sheet 9 sandwiching the absorbent body 8 therebetween, so it can be said to have a laminate of these multiple sheets.

Here, as shown in FIG. 3, one end of the cover sheet 4F is folded back at the fold-back line 4F6. The above-mentioned waist gather 3R is formed by arranging rubber threads (rubber threads) 4F2 and 4F3 on the cover sheet 4F and arranging rubber threads (rubber threads) 4R2 and 4R3 on the cover sheet 4R. The rubber threads 4F2 and 4F3 on the cover sheet 4F are arranged in the order of rubber threads 4F2 and rubber threads 4F3 from the fold-back line 4F6 side along the fold-back line 4F6 that will form the upper edge 41F (see FIG. 3) of the front body region 1F when folded back. Similarly to the rubber threads 4F2 and 4F3, the rubber threads 4R2 and 4R3 on the cover sheet 4R are arranged in the order of rubber threads 4R2 and rubber threads 4R3 from the fold-back line 4R6 side along the fold-back line 4R6 that will form the upper edge 41R (see FIG. 3) of the back body region 1R when folded back. Therefore, the rubber threads 4F2 and 4F3 are provided on the cover sheet 4F with the waist circumference direction, which is the stretch direction, oriented in the left-right direction of the diaper 1. The rubber threads 4R2 and 4R3 are provided on the cover sheet 4R with the longitudinal direction, which is the stretch direction, oriented in the left-right direction of the diaper 1. Therefore, when the edge 4F7 and the edge 4R7 are joined to each other and the edge 4F8 and the edge 4R8 are joined to each other, the rubber threads 4F2 and 4F3 and the rubber threads 4R2 and 4R3 form a substantially annular stretch member that goes around the waist opening 2T, and perform the function of contracting the waist opening 2T in the waist circumference direction. In other words, the rubber threads 4F2 and 4F3 and the rubber threads 4R2 and 4R3 exert a contraction force to bring the diaper 1 into close contact with the wearer and prevent the formation of a gap between the diaper 1 and the wearer's abdominal circumference.

Furthermore, rubber threads 4F4 and 4F5 are arranged on the cover sheet 4F, and rubber threads 4R4 and 4R5 are arranged on the cover sheet 4R. The rubber threads 4F4 and 4F5 are elastic members provided in the region of the cover sheet 4F closer to the crotch region 1B than the rubber threads 4F3. However, unlike the rubber threads 4F2 and 4F3 that are arranged without interruption from the left end to the right end of the cover sheet 4F, the rubber threads 4F4 and 4F5 have their widthwise center portions cut by a predetermined width, which are portions corresponding to the absorbent body 8. The cover sheet 4F has the rubber threads 4F4 and 4F5 whose widthwise center portions corresponding to the absorbent body 8 are cut, so that the expansion of the absorbent body 8 due to water absorption is not hindered, and the cover sheet 4F provides an appropriate feeling of close contact with the lower abdomen of the wearer. The cover sheet 4R is similar to the cover sheet 4F, and rubber threads 4R4, 4R5, the central portion in the width direction corresponding to the absorbent body 8, are cut to a predetermined width and placed on the cover sheet 4R, providing an appropriate fit to the lower abdomen of the wearer.

Figure 4 is a cross-sectional view of the diaper according to the embodiment taken along line A-A in Figure 3. A center sheet 9 is disposed on the skin-facing side of the absorbent body 8, and a back sheet 7 is disposed on the non-skin-facing side, with the absorbent body 8 being wrapped in the center sheet 9 and the back sheet 7. The center sheet 9 is a water-permeable sheet that feels good against the skin and may be hydrophilic. The back sheet 7 is not water-permeable and prevents bodily fluids absorbed into the absorbent body 8 via the center sheet 9 from leaking out from the non-skin-facing side. The center sheet 9 and the back sheet 7 are folded along the absorbent body 8 on the sides of the absorbent body 8, but are also bent in the width direction and bonded in a manner that protrudes in the width direction of the absorbent body 8.

The side sheets 10R, 10L are non-permeable and are bonded to the absorbent 8 only on the non-skin side of the absorbent 8. Rubber threads 10R1, 10L1 are attached to the skin side ends of the side sheets, and these rubber threads 10R1, 10L1 form three-dimensional gathers 3BR, 3BL. When the diaper is worn, the three-dimensional gathers 3BR, 3BL rise up and come into close contact with the wearer's skin, preventing excrement from leaking out of the diaper 1 beyond the three-dimensional gathers 3BR, 3BL.

Rubber threads 10R2, 10L2 are adhered to the longitudinal direction of the portions of the side sheets 10R, 10L that correspond to the sides of the absorbent body 8. The portions of the side sheets 10R, 10L that correspond to the sides of the absorbent body 8 are pleated due to the force of the rubber threads 10R2, 10L2. In addition, the adhesive portion between the center sheet 9 and the back sheet 7 protrudes in the width direction. Therefore, due to the pleats and protrusions, a certain amount of space is secured between the side sheets 10R, 10L and the sides of the absorbent body 8 wrapped by the center sheet 9 and back sheet 7.

The portions of the side sheets 10R, 10L that correspond to the side portions of the absorbent body 8 are pressed in the width direction by the joint between the center sheet 9 and the back sheet 7. This makes it easier for the three-dimensional gathers on the side sheets 10R, 10L to rise up. This configuration makes it easier for the three-dimensional gathers 3BR, 3BL to rise up against the wearer's skin. Therefore, when putting the diaper 1 on the wearer, the wearer can put the diaper on correctly in a way that the three-dimensional gathers can regulate excrement, even if they do not pay attention to how the three-dimensional gathers rise up.

When soft or watery stool is excreted into a diaper 1 of this type, the excreta that has not passed through the center sheet 9 and been absorbed by the absorbent body 8 moves over the center sheet 9 and falls into the space between the side of the absorbent body 8 wrapped in the center sheet 9 and back sheet 7 and the inner side sheets 12L, 12R, while being prevented from leaking out of the diaper by the three-dimensional gathers 3BR. As mentioned above, the side sheets 10R, 10L on the side of the absorbent body 8 are pleated by the force of the rubber threads 10R2, 10L2, so that the excreta can be supported over a wide surface area. The non-skin-facing side of this space is wrapped in a non-permeable sheet, so the excreta will not leak out of the diaper 1.

The waste that falls into this space spreads out in the longitudinal direction of the diaper. In other words, this space also functions as a flow path for the waste. In this way, while the waste is spread out in the longitudinal direction and held in this space, the moisture contained in the waste is slowly absorbed and dried from a wide area at the widthwise end of the absorbent 8, preventing the waste from leaking out of the diaper and preventing the wearer from feeling uncomfortable for a long time. In addition, the free ends of the inner side sheets 12L, 12R and the three-dimensional gathers 3BR, 3BL multiplexly restrict the discharge of waste in the thigh direction, preventing the waste from leaking out of the diaper 1.

The side sheets 10R, 10L may also have leg gathers 3CR, 3CL. Even when the three-dimensional gathers 3BR, 3BL are unable to restrict the excrement, the leg gathers 3CR, 3CL can prevent the excrement from leaking out of the diaper 1. Since the diaper 1 according to this embodiment has a space for accommodating the excrement as described above, the leg gathers 3CR, 3CL may not be provided.

Figure 5 is a cross-sectional view of the structure of another embodiment. Figure 5 is a cross-sectional view of a different embodiment of the diaper cut along line A-A in Figure 3. In this embodiment, the configuration of the side sheets 10R, 10L is the same as that of Figure 4, but the center sheet 9 and back sheet 7 are not folded along the side of the absorbent body 8, but extend and are joined to the lateral sides of the absorbent body 8 in the width direction. Therefore, the side sheets 10R, 10L are pushed out more strongly in the width direction by the protrusion of the center sheet 9 and back sheet 7. As a result, a larger space is formed between the side sheets 10R, 10L and the absorbent body 8.

In addition, the side sheets 10R, 10L are pushed out more strongly from the sides of the absorbent body 8, so that the three-dimensional gathers 3BR, 3BL are more likely to rise up against the wearer's skin than in the configuration shown in FIG. 5. Therefore, when putting the diaper 1 on the wearer, the wearer can put the diaper on correctly in a way that the three-dimensional gathers can regulate excrement, even if the wearer does not pay attention to how the three-dimensional gathers rise up.

Figure 6 is a cross-sectional view of the structure of another embodiment. Figure 6 is a cross-sectional view of a further different embodiment in which the diaper is cut along line A-A in Figure 3. In this embodiment, the configuration of the side sheets 10R, 10L is the same as that of the embodiment shown in Figure 5, but it differs in that the center sheet 9 and the back sheet 7 are not bonded to the sides of the absorbent body as in the other embodiments. In this embodiment, the center sheet 9 encases the skin-facing side widthwise end and non-skin-facing side widthwise end of the absorbent body 8.

The center sheet 9 and the back sheet 7 are bonded to a certain extent around the non-skin facing side of the absorbent body 8. The side sheets 10L, 10R are also bonded at the same positions. With this configuration, the water-permeable center sheet wraps around to the non-skin facing side of the user at the positions where the side sheets 10L, 10R are joined. As a result, the absorbent body 8 side of the space formed between the center sheet 9 and the side sheets 10R, 10L is entirely formed of a water-permeable sheet.

While the moisture contained in the waste that falls into this space is spread out and held in the longitudinal direction in this space, it is absorbed and dried faster than in previous embodiments via the center sheet 9 that covers the entire area of the absorbent body 8, thereby shortening the time that the wearer feels uncomfortable.

In the embodiment shown in FIG. 6, the side sheets 10R, 10L cannot be pushed out further in the width direction from the absorbent body 8, so the three-dimensional gathers 3BR, 3BL are less likely to rise up from the wearer's skin surface. For this reason, folds or protrusions can be provided by loosening the side of the center sheet 9 on the absorbent body 8 or by bonding the center sheets 9 together from the inside. These folds or protrusions make it easier to form a space between the side sheets 10L, 10R and the three-dimensional gathers 3BR, 3BL, and also make it easier for them to rise up.

The features of the present invention have been described above, but the content of the present invention is not limited to the above embodiment.

Fig. 7 is a cross-sectional view of another embodiment of the structure. Fig. 6 is a cross-sectional view of a diaper of yet another embodiment taken along line A-A in Fig. 3. Inner side sheets 12R, 12L are bonded to the non-skin facing side of the back sheet 7. The inner side sheets 12R, 12L are water impermeable and are compressed in the longitudinal direction by rubber threads 12R2, 12L2.
A plurality of rubber threads 12L2 are provided on each of the inner side sheets 12R and 12L. Due to the bias of the rubber threads 12R2 and 12L2, the inner side sheets 12R and 12L are pleated on the sides of the absorbent body 8, and the skin-facing ends of the inner side sheets are free ends.

The side sheets 10L, 10R are bonded to the outer side of the inner side sheets 12R, 12L in the short direction. The side sheets 10L, 10R are non-permeable as in the above-mentioned embodiment. Elastic threads 10R1, 10R2 are attached to the skin-facing end of the side sheets to form three-dimensional gathers 3BR, 3BL. The side sheets 10L, 10R may be bonded to the back sheet 7 on the non-skin-facing side of the absorbent body 8, or may be bonded to the side of the inner skin-facing sheet 12L, 12R. In either case, the inner side sheets 12L, 12R and the side sheets 10L, 10R are bonded together, so that bodily fluids do not leak out of the diaper 1 through the gap between the two sheets. The side sheets 10L, 10R may further have a biasing member attached to the widthwise end to form leg gathers.

The waste that falls into this space spreads out in the longitudinal direction of the diaper. In other words, this space also functions as a flow path for the waste. In this way, while the waste is spread out in the longitudinal direction and held in this space, the moisture contained in the waste is slowly absorbed and dried from a wide area at the widthwise end of the absorbent 8, preventing the waste from leaking out of the diaper and preventing the wearer from feeling uncomfortable for a long time. In addition, the free ends of the inner side sheets 12L, 12R and the three-dimensional gathers 3BR, 3BL multiplexly restrict the release of waste in the thigh direction, effectively preventing the waste from leaking out of the diaper 1.

The components of these forms can be combined with each other.

1... Diaper 1B... Crotch region 1F... Front body region 1R... Back body region 2T... Torso opening 2L... Left lower leg opening 2R... Right lower leg opening 3BL, 3BR... Three-dimensional gathers 3R... Waist gathers 3CR, 3CL... Leg gathers 4F, 4R... Cover sheet 4F1, 4R1... Openings 4F2, 4F3, 4F4, 4F5, 4R2, 4R3, 4R4, 4R5, 10L1, 10R1... Rubber thread 4F6, 4R6, 10L2, 10R2...Fold-back lines 4F7, 4F8, 4R7, 4R8...Edges 5F, 5R...Inner cover sheet 6...Pad cover sheet 7...Back sheet 8...Absorbent body 9...Center sheet 10L, 10R...Side sheets 10R1, 10R2, 10L1, 10L2...Rubber thread 12L, 12R...Inner side sheet 12R2, 12L2...Rubber thread

Claims (4)

An absorbent body to be placed under the wearer's crotch;
A water-permeable center sheet covering the skin side of the absorbent body;
A non-permeable back sheet covering the non-skin facing side of the absorbent body;
a sheet in which a plurality of first elastic bodies are joined in parallel with the longitudinal direction of the absorbent body and which is biased into a pleated shape by the bias of the plurality of first elastic bodies;
Equipped with
The sheet that is biased into a pleated shape is adhered to the non-skin-facing side of the absorbent body, and the side surface of the absorbent body rises toward the skin-facing side,
The center sheet and the back sheet are joined at the end portions of the absorbent body in the width direction, and the joined end portions are directed outward in the width direction,
The center sheet and the back sheet are not joined to the sheet that is biased into a pleated shape at the joint end portion,
The plurality of first elastic bodies are arranged in portions of the sheet that are biased into pleats, the portions corresponding to the sides of the absorbent body.
Absorbent articles. The other end of the sheet that is forced into a pleated shape is a free end.
The absorbent article of claim 1. A second elastic body is joined to the other end of the sheet that is biased into a pleated shape, and the sheet is brought into close contact with the skin surface of the wearer.
The absorbent article according to claim 1 or 2 . The center sheet and the back sheet are joined to each other while extending outward in the width direction of the absorbent body without being bent along the side surface of the absorbent body.
An absorbent article according to any one of claims 1 to 3 .

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