Absorbent articles

Abstract

To provide an absorbent article which prevents discharge deviation and has a good wearing feeling.SOLUTION: An absorbent article is provided, including an absorber disposed at the crotch of the wearer, a water-permeable center sheet covering a skin surface side of the absorber, a non-water-permeable back sheet covering a non-skin surface side of the absorber, and a sheet for joining a plurality of elastic bodies in parallel with the longitudinal direction of the absorber to be energized in a pleats-like form by energization of the plurality of elastic bodies. The sheet energized in a pleats-like form is attached to the non-skin surface side of the absorber, and makes side surfaces of the absorber rise toward the skin surface side.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an absorbent article. [Background technology]

[0002] Conventionally, there are known absorbent articles such as disposable diapers that rapidly guide and absorb excreted urine and bodily fluids into an absorbent body. However, since the absorbent body is designed to absorb liquids, if the excreted material is soft or watery, the absorbent body cannot absorb the solid content.

[0003] As a result, loose 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 loose or watery stool remains on the surface of the diaper for a long time, there is a risk that it will leak out of the diaper beyond the biasing members such as the three-dimensional gathers due to the wearer's movements.

[0004] Therefore, a technology is known in which pleats are provided in the center sheet, and while the pleats hold back the waste, moisture contained in soft or watery stool is guided into the absorbent body, preventing it from leaking out of the biasing body (Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2017-29597 A Summary of the Invention [Problem to be solved by the invention]

[0006] To make it easier for an absorbent body to absorb moisture contained in waste materials and to prevent the waste materials from leaking out of an urging body. [Means for solving the problem]

[0007] To solve the above problem, a sheet containing an urging body is raised from the non-skin facing side of the diaper, and excrement is contained between the sheet and the absorbent body while absorbing moisture from the sides of the absorbent body, preventing leakage.

[0008] Specifically, the present invention is an absorbent article comprising an absorbent body to be 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 side of the absorbent body towards the skin-facing side.

[0009] The other end of the sheet that is forced into pleats may be a free end.

[0010] An elastic body can be joined to the other end of the sheet that is biased into pleats, so that it can be brought into close contact with the skin of the wearer.

[0011] The center sheet and the back sheet can also be configured so that the joined ends are joined at the widthwise ends of the absorbent body so that the joined ends face outward in the widthwise direction, and the joined ends are not joined to the sheet that is biased into the pleated shape.

[0012] The center sheet and the back sheet may be 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.

[0013] The center sheet may extend to the non-skin facing side of the absorbent body and be joined to the back sheet and the sheet biased into pleats. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view of a diaper according to an embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of the diaper according to the embodiment. [Diagram 3]FIG. 3 is a schematic diagram showing the diaper according to the embodiment in an unfolded and stretched state. [Figure 4] FIG. 4 is a cross-sectional view of the diaper according to the embodiment taken along line AA. [Diagram 5] FIG. 5 is a cross-sectional view of an alternative structure. [Figure 6] FIG. 6 is a cross-sectional view of an alternative structure. [Figure 7] FIG. 7 is a cross-sectional view of an alternative structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, a diaper according to an embodiment of the present invention will be described with reference to the drawings. Note that the configurations of the following embodiments are merely examples, and the present invention is not limited to the configurations of these embodiments.

[0016] <Embodiment> Fig. 1 is a perspective view of a pants-type disposable diaper (hereinafter simply referred to as "diaper") according to this 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.

[0017] In this embodiment, as an example of an absorbent article, a pants-type disposable diaper having a tubular structure having an opening for receiving the wearer's abdominal circumference and a pair of left and right openings for inserting the wearer's left and right lower limbs is illustrated, 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 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 (genital area) from the front body to the back body to the other end of the sheet-like member.

[0018] 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 in the rear of 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 leg opening 2L formed in a left portion of the crotch region 1B where the above-mentioned joining is not performed, and a right leg opening 2R formed in a right portion of the crotch region 1B. When the diaper 1 is put on such that the wearer's left leg is inserted through the left leg opening 2L, the wearer's right leg is inserted through the right 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 leg opening 2R is disposed on the wearer's torso opening 2T. The opening 2L and the right leg opening 2R are fixed to the wearer's body in such a manner that 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.

[0019] In the diaper 1, an absorbent capable of absorbing and retaining liquid is mainly disposed near the crotch region 1B. In addition, in order to prevent the formation of a gap between the diaper 1 and the wearer's skin that can be a liquid outflow path, the diaper 1 is provided with leg gathers 3AL, 3AR at a portion surrounding the wearer's legs (thighs), and three-dimensional gathers 3BL, 3BR are provided on the inner side of the leg gathers 3AL, 3AR in the width direction of the diaper 1, and a waist gather 3R is provided at a portion surrounding the wearer's abdominal circumference. The leg gathers 3AL, 3AR, the three-dimensional gathers 3BL, 3BR, and the waist gathers 3R are in close contact with the wearer's skin by the elastic force of the elastic members. Therefore, bodily fluids discharged from the wearer's private parts are absorbed into the absorbent of the diaper 1 without leaking out of the diaper 1. As the elastic member, a thread-like or strip-like rubber or the like can be appropriately selected.

[0020] Fig. 2 is an exploded perspective view of the diaper 1. Fig. 3 is a schematic diagram showing the diaper 1 according to the embodiment in an unfolded and stretched state. Fig. 3 is a schematic plan view of the diaper 1 in an unfolded and stretched state.

[0021] The diaper 1 has cover sheets 4F, 4R and a pad cover sheet 6 which 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 to 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 thereof. Examples of the liquid-impermeable thermoplastic resin 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.

[0022] 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 a fold-back line 4F6 (described later). The inner coversheet 5R, like the inner coversheet 5F, 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 an inner coversheet 5F6 (described later).

[0023] 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 penetrates into the absorbent body 8, where the liquid is absorbed. The liquid is absorbed by the center sheet 9. Examples of the liquid-permeable sheet include woven fabric, nonwoven fabric, and porous film. The center sheet 9 may also be hydrophilic.

[0024] The absorbent body 8 has a structure in which granular absorbent resin such as hydrophilic superabsorbent polymer having a cross-linked structure capable of absorbing and retaining water is held in gaps between short fibers of cellulosic fibers such as pulp fibers, rayon fibers, or cotton fibers, or between short fibers obtained by hydrophilizing synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate. 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 the core wrap sheet, the granular absorbent resin can be prevented from leaking into other sheets.

[0025] 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 laminated, 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 liquid, the excreted body liquid will in principle come into contact with the absorbent body 8 via the center sheet 9.

[0026] The diaper 1 also has long, 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 to prevent liquid from leaking out from the left lower leg opening 2L and the right lower leg opening 2R. The method for 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 may be, for example, heat sealing, high-frequency sealing, ultrasonic sealing, etc.

[0027] The diaper 1 also has an air passage forming sheet 11F laminated on the wearer side surface of the cover sheet 4F, with the pad cover sheet 6, back sheet 7, absorber 8, center sheet 9, and side sheets 10L and 10R in between, 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 one end side of the center sheet 9 in the longitudinal direction of the cover sheet 4F. The air passage forming sheet 11R is laminated on the cover sheet 4R in the other end side of the center sheet 9 in the longitudinal direction. In the present application, the state in which the sheets are overlapped is not limited to a form in which the overlapped sheets are in full contact with each other, but is a concept that includes a form in which parts of the sheets are overlapped. For example, the air passage forming sheet 11F is laminated on the longitudinal end side of the pad cover sheet 6, with the air passage forming sheet 11F being laminated on the longitudinal end side of the center sheet 9. The sheet is overlapped with a portion of one end of the sheet in contact with a portion of the cover sheet 4F.

[0028] 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.), etc. can be applied. The formation of the ventilation holes 11F1, 11R1 in the air passage forming sheets 11F, 11R does not mean that the air passage forming sheets 11F, 11R are made of a material that has no breathability, and the air passage forming sheets 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, the opening area is 0.5 to 10 mm 2 It is preferable that about 5 to 200 holes are formed.

[0029] 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, and can be said to have a laminate formed by stacking these multiple sheets.

[0030] Here, as shown in Fig. 3, one end of the cover sheet 4F is folded back at a folding line 4F6. The above-mentioned waist gather 3R is formed by arranging rubber threads (rubber threads) 4F2, 4F3 on the cover sheet 4F and arranging rubber threads (rubber threads) 4R2, 4R3 on the cover sheet 4R. The rubber threads 4F2, 4F3 arranged on the cover sheet 4F are arranged in the order of the rubber thread 4F2 and the rubber thread 4F3 from the folding line 4F6 side along the folding 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, 4F3, the rubber threads 4R2, 4R3 arranged on the cover sheet 4R are arranged in the order of the rubber thread 4R2 and the rubber thread 4R3 from the folding line 4R6 side along the folding 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, 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, 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, 4F3 and the rubber threads 4R2, 4R3 form a substantially annular stretchable member that goes around the waist opening 2T, and exert the function of contracting the waist opening 2T in the waist circumference direction. In other words, the rubber threads 4F2, 4F3 and the rubber threads 4R2, 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.

[0031] 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 arranged in the area of ​​the cover sheet 4F closer to the crotch region 1B than the rubber thread 4F3. However, unlike the rubber threads 4F2 and 4F3 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 corresponds to the absorbent body 8. The cover sheet 4F has the rubber threads 4F4 and 4F5 cut at their widthwise center portions, which corresponds to the absorbent body 8, so that the cover sheet 4F provides an appropriate feeling of close contact with the wearer's lower abdomen without inhibiting the expansion of the absorbent body 8 due to water absorption. The cover sheet 4R is similar to the cover sheet 4F, and the rubber threads 4R4 and 4R5 cut at their widthwise center portions, which corresponds to the absorbent body 8, by a predetermined width are arranged on the cover sheet 4R. This provides a comfortable fit around the wearer's lower abdomen.

[0032] 4 is a cross-sectional view of the diaper according to the embodiment taken along line AA in FIG. 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 through 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 side of the absorbent body 8, but are further bent in the width direction and bonded in a manner that protrudes in the width direction of the absorbent body 8.

[0033] The side sheets 10R, 10L are non-permeable and are bonded to the absorbent body 8 only on the non-skin facing side of the absorbent body 8. Rubber threads 10R1, 10L1 are attached to the skin facing 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.

[0034] 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 bias of the rubber threads 10R2, 10L2. In addition, the adhered portion between the center sheet 9 and the back sheet 7 protrudes in the width direction. Therefore, a certain space is secured between the side sheets 10R, 10L and the sides of the absorbent body 8 wrapped by the center sheet 9 and the back sheet 7 due to the pleats and protrusions.

[0035] 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 a wearer, the wearer can put the diaper on correctly in a way that the three-dimensional gathers can regulate excreta even if they do not pay attention to how the three-dimensional gathers rise up.

[0036] Furthermore, when soft or watery stool is excreted into the 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 is prevented from leaking out of the diaper by the three-dimensional gathers 3BR, and falls into the space formed 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. As mentioned above, the side sheets 10R, 10L on the side of the absorbent body 8 are pleated by the elastic threads 10R2, 10L2, so that the excreta can be supported over a wide surface area. The non-skin-facing side of the space is wrapped in a non-permeable sheet, so that the excreta does not leak out of the diaper 1.

[0037] The waste that falls into the space spreads in the longitudinal direction of the diaper. In other words, the space also functions as a flow path for the waste. In this way, while the waste is spread in the longitudinal direction and held in the space, the moisture contained in the waste is slowly absorbed and dried from a wide area at the widthwise end of the absorbent body 8, so that the waste can be prevented from leaking out of the diaper and causing discomfort to the wearer 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 the waste toward the thighs, so that the waste can be prevented from leaking out of the diaper 1.

[0038] The side sheets 10R, 10L may also have leg gathers 3CR, 3CL. In cases where the leg gathers 3CR, 3CL cannot regulate the three-dimensional gathers 3BR, 3BL, Even in this case, it is possible to prevent excrement from leaking out of the diaper 1. Since the diaper 1 according to this embodiment has a space for accommodating excrement as described above, the leg gathers 3CR, 3CL may not be provided.

[0039] Fig. 5 is a cross-sectional view of the structure of another embodiment. Fig. 5 is a cross-sectional view of a different embodiment of the diaper cut along the line AA in Fig. 3. In this embodiment, the configuration of the side sheets 10R, 10L is the same as that of Fig. 4, but the center sheet 9 and the back sheet 7 are not folded along the side of the absorbent body 8, but extend and join 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 the back sheet 7. As a result, a larger space is formed between the side sheets 10R, 10L and the absorbent body 8.

[0040] Furthermore, as a result of the side sheets 10R, 10L being pushed out more strongly from the sides of the absorbent body 8, 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 a wearer, the wearer can put the diaper on correctly in a manner that allows the three-dimensional gathers to regulate excrement, even if the wearer does not pay attention to the way the three-dimensional gathers rise up.

[0041] Fig. 6 is a cross-sectional view of the structure of another embodiment. Fig. 6 is a cross-sectional view of a further different embodiment of the diaper cut along line AA in Fig. 3. In this embodiment, the configuration of the side sheets 10R, 10L is the same as that of the embodiment shown in Fig. 5, but it is different 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 envelops the skin-facing side widthwise end and the non-skin-facing side widthwise end of the absorbent body 8.

[0042] The center sheet 9 and the back sheet 7 are bonded to the absorbent body 8 at a position where they wrap around to a certain extent on the non-skin facing side. 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.

[0043] The moisture contained in the excrement that falls into this space is absorbed and dried faster than in previous embodiments through the center sheet 9 that covers the entire relevant area of ​​the absorbent body 8 while it is spread and retained in the longitudinal direction in the space, thereby shortening the time that the wearer feels discomfort.

[0044] 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 side or by bonding the center sheets 9 together from the inside. The 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.

[0045] Although the features of the present invention have been described above, the content of the present invention is not limited to the above-described embodiment.

[0046] Fig. 7 is a cross-sectional view of another embodiment of the structure. Fig. 6 is a cross-sectional view of a diaper cut along line AA in Fig. 3 in yet another embodiment. Inner side sheets 12R, 12L are adhered 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, 12L. Due to the bias of the rubber threads 12R2, 12L2, the inner side sheets 12R, 12L are pleated on the sides of the absorbent body 8, and the skin-facing ends of the inner side sheets are free ends.

[0047] 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 to each other, 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.

[0048] The waste that falls into this space spreads 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 and held in the longitudinal direction 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 body 8, so that the waste can be prevented from leaking out of the diaper and causing discomfort to the wearer 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 the waste toward the thighs, so that the waste can be effectively prevented from leaking out of the diaper 1.

[0049] Each of these aspects can be combined with each other. [Explanation of symbols]

[0050] 1. Diapers 1B...Inseam area 1F: Front body area 1R: Back body area 2T··Body opening 2L·Left lower limb opening 2R・Right lower limb opening 3BL, 3BR: 3D gathers 3R: Waist gather 3CR,3CL··Leg Gathers 4F, 4R··Cover sheet 4F1,4R1...Aperture 4F2, 4F3, 4F4, 4F5, 4R2, 4R3, 4R4, 4R5, 10L1, 10R1... Rubber thread 4F6, 4R6, 10L2, 10R2... Folding lines 4F7, 4F8, 4R7, 4R8... Edge 5F, 5R··Inner cover sheet 6··Pad cover sheet 7. Back sheet 8. Absorber 9. Center seat 10L, 10R: Side seat 10R1, 10R2, 10L1, 10L2... Rubber thread 12L, 12R: Inner side seat 12R2, 12L2... Rubber thread

Claims

1. 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.

2. The other end of the sheet that is forced into a pleated shape is a free end. The absorbent article of claim 1.

3. 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.

4. 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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