Absorbent articles

Abstract

To provide an absorbent article whose use form can be selected by a user, and which can suppress leakage of body fluid from an end part in a cross direction regardless of a use form.SOLUTION: An absorbent article comprises: a top sheet 2; a back sheet 3; and an absorber 4 placed therebetween. The absorbent article 1 has a cross direction D1 corresponding to front / rear sides of a user. The top sheet 2 has an over-sheet 10 on one end part thereof in the cross direction D1. The over-sheet 10 is a sheet material having a first surface 11 facing the top sheet 2, with hydrophilic property, and a second surface 12 opposite to the first surface 11, with water repellency. In a fixed region K1, the over-sheet 10 is fixed to the top sheet 2 by fixing force for inhibiting peeling, and can be folded back outward of the cross direction D1 with the fixed region K1 as a folding position.SELECTED DRAWING: Figure 1

Description

【Technical Field】 【0006】 , , 【0001】 The present invention relates to absorbent articles. 【Background Art】 【0002】 Conventionally, in an absorbent article that is long in the front-rear direction corresponding to the front and rear of the user, in order to prevent leakage of body fluid from one end (front end) in the front-rear direction, an absorbent article that is used with one end (front end) in the front-rear direction raised toward the user side is known (see, for example, Patent Document 1 and Patent Document 2). 【Prior Art Documents】 <00目标是提供一种吸收性物品,该物品能够让使用者选择使用形态,并且无论使用形态如何,都能抑制前后方向端部的体液泄漏。 【Means for Solving the Problems】 【0006】 ​​​​​​​​​​​​​​​​​​​​​​​​​​​To achieve the above objective, the present invention provides an absorbent article comprising a top sheet, a back sheet, and an absorbent body disposed between them, having a front-to-back direction corresponding to the front and back of the user and a width direction perpendicular to the front-to-back direction, wherein an oversheet is superimposed on at least one end of the top sheet in the front-to-back direction, and a pair of gathered sheets are provided on the skin side of the top sheet, disposed on both sides of the absorbent body in the width direction and extending in the front-to-back direction, and standing up from the top sheet by the contraction force of an elastic stretch material. The gathered sheet has non-stretchable regions at both ends in the front-to-back direction, and stretchable regions in the middle of the front-to-back direction where the contraction force of the elastic stretch material functions. The oversheet covers the front-to-back ends of the pair of gathered sheets, and is made of a sheet material in which the first surface facing the top sheet is hydrophilic and the second surface opposite the first surface is water-repellent. In the fixing area, it is fixed to the top sheet with a fixing force that inhibits peeling, and the fixing area is foldable outwards in the front-to-back direction, allowing selection between a first usage form in which the top sheet and the oversheet overlap with a gap between them, and a second usage form in which the oversheet is folded back so that the first surface faces the user. The fixing area is positioned between the pair of gathered sheets. , when viewed from the stacking direction in which the top sheet, the absorbent, and the back sheet overlap, the above is set in a position that does not overlap with the non-stretchable region and the stretchable region. This configuration was adopted. [Effects of the Invention] 【0007】 As a result, the absorbent article of the present invention allows the user to select the form of use, and regardless of the form of use, it can suppress leakage of bodily fluids from the front-to-back ends. [Brief explanation of the drawing] 【0008】 [Figure 1] This is a cross-sectional plan view showing a portion of the absorbent article of Example 1. [Figure 2] This is a cross-sectional view of AA in Figure 1. [Figure 3] This is an enlarged view of section B in Figure 1. [Figure 4] Figure 3 is a cross-sectional view of CC. [Figure 5] Figure 3 is a cross-sectional view of the DD. [Figure 6]This is a plan view of the main part of the absorbent article of Example 1, showing the oversheet folded back. [Figure 7] Figure 6 is a cross-sectional view of the EE. [Modes for carrying out the invention] 【0009】 Embodiments for carrying out the absorbent article according to the present invention will be described below based on Example 1 shown in the drawings. 【0010】 The absorbent article 1 in Example 1 is a sanitary napkin intended to absorb bodily fluids (mainly menstrual blood and vaginal discharge). As shown in Figure 1, the absorbent article 1 of Example 1 comprises a top sheet 2, a back sheet 3, an absorbent core 4, and a pair of gather sheets 5. The absorbent article 1 is formed by sandwiching the absorbent core 4 between the top sheet 2 and the back sheet 3, with the gather sheets 5 further placed on top of the top sheet 2, and fixing an appropriate area, including at least the periphery, with an adhesive such as hot melt or welding. 【0011】 Furthermore, when using the absorbent item 1, the back sheet 3 is fixed to the underwear, and the top sheet 2 faces the user's skin. In other words, the top sheet 2 side of the absorbent item 1 is the skin side (front side), and the back sheet 3 side is the non-skin side (back side). The plan view in Figure 1 is a view of the absorbent item 1 from the skin side. 【0012】 Furthermore, in the following explanation, the direction corresponding to the front and back of the user's body is defined as the front-to-back direction D1 of the absorbent article 1, and the direction perpendicular to the front-to-back direction D1 is defined as the width direction D2 of the absorbent article 1. In addition, the direction in which the top sheet 2, absorbent material 4, and back sheet 3 overlap in order (the thickness direction of the absorbent article 1) is defined as the stacking direction D3 of the absorbent article 1. 【0013】 The absorbent article 1 has an elongated, flattened shape in the front-to-back direction D1 when viewed from the stacking direction D3 in a plan view. In addition, the absorbent article 1 of Embodiment 1 has a pair of wing portions 6, 6 that extend outward in the width direction D2 in the intermediate region in the front-to-back direction D1. When the absorbent article 1 is attached to underwear, the wing portions 6 are folded back towards the non-skin side at their base ends and wrap around the crotch area of ​​the underwear to secure the absorbent article 1. 【0014】 In the example shown in Figure 1, the absorbent article 1 has a planar shape that is approximately symmetrical with respect to the center line CL, which extends in the front-to-back direction D1 from the center position in the width direction D2. However, the shape of the absorbent article 1 does not have to be symmetrical with respect to the center line CL. Furthermore, the other components of the absorbent article 1 (including the thickness and density of the absorbent material 4, the size and position of the compression grooves, the shape and size of the wing portion 6, etc.) may or may not be symmetrical with respect to the center line CL. 【0015】 Top sheet 2 is a permeable sheet material that allows bodily fluids to pass through quickly. The sheet material constituting top sheet 2 is preferably a perforated or non-perforated nonwoven fabric or a porous plastic sheet. The material fibers constituting the nonwoven fabric can be, for example, polyethylene, polypropylene or other olefins, synthetic fibers such as polyester and polyamide, regenerated fibers such as rayon and cupro, and blends thereof, as well as natural fibers such as cotton, which can be used individually or in combination of two or more. The processing method for the nonwoven fabric can be, for example, the spunlace method, the spunbond method, the thermal bond method, the meltblown method, or the needle punch method. Of these processing methods, the spunlace method is preferred because it can produce a nonwoven fabric with high flexibility. The spunbond method is preferred because it can produce a nonwoven fabric with high drape, and the thermal bond method is preferred because it can produce a bulky and soft nonwoven fabric. Furthermore, the material fibers constituting the nonwoven fabric may include composite fibers such as core-sheath fibers, side-by-side fibers, and split fibers, where a fiber with a high melting point forms the core and a fiber with a low melting point forms the sheath. 【0016】 The backsheet 3 is a liquid-impermeable (waterproof) sheet material that does not allow body fluids to permeate. The sheet material constituting the backsheet 3 is preferably a sheet made of an olefin resin such as polyethylene or polypropylene. Further, as the backsheet 3, a laminated non-woven fabric obtained by laminating a non-woven fabric on a polyethylene sheet or the like, or a laminated sheet of non-woven fabric having substantially liquid impermeability by interposing a waterproof film may be used. Furthermore, from the perspective of preventing stuffiness, it is desirable that the backsheet 3 uses a sheet material having moisture permeability. The water-blocking and moisture-permeable sheet material can use a microporous sheet obtained by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, forming a sheet, and then stretching it in a uniaxial or biaxial direction. 【0017】 The absorber 4 is a liquid absorbent material that absorbs and holds body fluids. The absorber 4 is composed of, for example, absorbent polymer particles and pulp fibers, and may be wrapped by a core wrap sheet (not shown) made of crepe paper, non-woven fabric, or the like. The absorber 4 is formed in an outer shape smaller than that of the topsheet 2 and the backsheet 3, and has a shape and size that do not protrude from the topsheet 2 and the backsheet 3 in the front-rear direction D1 and the width direction D2. The absorber 4 may be a single layer or a multi-layer. 【0018】 The gather sheet 5 is an elongated sheet material disposed on both sides in the width direction D2 of the absorber 4 and fixed to the skin side of the topsheet 2 and extending in the front-rear direction D1. The gather sheet 5 is formed of, for example, a water-repellent or liquid-impermeable non-woven fabric or the like. One end portion of the gather sheet 5 in the width direction D2 is fixed to the topsheet 2 by an adhesive such as hot melt or welding. Further, at the other end portion of the gather sheet 5 in the width direction D2, a plurality of elastic stretch members 5a extending in the front-rear direction D1 and arranged in parallel in the width direction D2 are provided in a predetermined stretched state. The elastic stretch member 5a is composed of, for example, a thread-like or belt-like synthetic rubber or the like. 【0019】 Then, the gather sheet 5 contracts due to the contraction force of the elastic stretch material 5a and stands up from the top sheet 2. In the absorbent article 1 of Example 1, the gather sheet 5 stands up to form a wall-like shape, thereby preventing leakage of body fluid (side leakage). 【0020】 Also, at both ends of the gather sheet 5 in the front-back direction D1, the other ends in the width direction D2 of the gather sheet 5 are also joined to the top sheet 2 and are lying down with respect to the top sheet 2. And in the portion of the gather sheet 5 that lies down with respect to the top sheet 2, since the elastic stretch material 5a is not provided on the gather sheet 5, it has no shrinkability. That is, the gather sheet 5 has non-stretch regions S1 at both ends in the front-back direction D1 where the gather sheet 5 does not contract. Also, the gather sheet 5 has a stretch region S2 in the middle portion in the front-back direction D1 where the contraction force of the elastic stretch material 5a functions effectively and stands up from the top sheet 2 by the contraction force of the elastic stretch material 5a. 【0021】 Also, as shown in FIG. 2, the absorbent article 1 is provided with a locking portion 7 that is locked to underwear during use on the non-skin side of the back sheet 3. The locking portion 7 is composed of, for example, an adhesive layer and extends in a band shape along the front-back direction D1. The absorbent article 1 is prevented from shifting with respect to the underwear by the locking portion 7 being locked to the underwear. And the locking portion 7 is disposed at a position overlapping the stretch region S2 when viewed from the lamination direction D3 (see FIG. 1). 【0022】 Furthermore, in the absorbent article 1 of Example 1, an over sheet 10 is overlapped on one end (here, the front end corresponding to the front side of the user) in the front-back direction D1 of the top sheet 2. The over sheet 10 is a sheet material having a hydrophilic first surface 11 facing the top sheet 2 in a state of being overlapped on the top sheet 2 as shown in FIG. 1, and a water-repellent second surface 12 on the opposite side of the first surface 11 (see FIG. 2). 【0023】 Here, the hydrophilic first surface 11 is preferably made of a hydrophilically treated nonwoven fabric, pulp sheet, or super absorbent polymer (SAP) sheet. The water-repellent second surface 12 is preferably made of a polyethylene sheet. As shown in Figure 2, the oversheet 10 is formed by laminating and bonding the sheet material constituting the first surface 11 and the sheet material constituting the second surface 12. 【0024】 Furthermore, it is preferable that the oversheet 10 is made of a sheet material that has uniform irregularities formed on its entire surface, for example, by embossing. However, the irregularities on the oversheet 10 do not need to be uniformly formed on the entire surface of the oversheet 10, and may be irregularities formed at arbitrary locations and of appropriate size. Also, the irregularities do not need to be formed by embossing, and may be formed, for example, by partially laminating sheet material. Furthermore, the irregularities only need to be formed on the first surface 11 of the oversheet 10, but may be formed on both the first surface 11 and the second surface 12. 【0025】 The oversheet 10 has an outer edge 10a in the front-to-back direction D1 that aligns with the outer edge 2a of the top sheet 2 in the front-to-back direction D1, and is sized so that its periphery does not extend beyond the top sheet 2 and the back sheet 3. Also, as shown in Figure 1, the oversheet 10 covers one end of the gathered sheet 5 in the front-to-back direction D1. The oversheet 10 has a fixed area K1 and a pair of temporary fixed areas K2. 【0026】 The fixing region K1 is set along the outer edge 10a of the oversheet 10 in the front-to-back direction D1 and extends in the width direction D2. The fixing region K1 is set in a position that does not overlap with the non-stretchable region S1 and stretchable region S2 of the gathered sheet 5 when viewed from the lamination direction D3. The oversheet 10 is fixed to the top sheet 2 in the fixing region K1 with a predetermined fixing force that prevents the oversheet 10 from peeling off from the top sheet 2. 【0027】 Here, "a predetermined fixing force that inhibits the peeling of the oversheet 10 from the topsheet 2" refers to a fixing force sufficient to prevent the oversheet 10 from peeling off the topsheet 2 (maintaining a fixed state) when the user grasps and pulls on the oversheet 10. 【0028】 In Example 1, hot melt adhesive is applied to the entire fixed area K1, and the fixed area K1 is pressed with a hot roll to heat-seal it, forming a wide, seamless, band-shaped embossed pattern across the entire fixed area K1. In other words, in the fixed area K1, the oversheet 10 is fixed to the topsheet 2 by the fixing force provided by the hot melt adhesive and the fixing force provided by the fusion of the band-shaped embossed pattern. 【0029】 Furthermore, the oversheet 10 is fixed to the topsheet 2 with a fixing force that inhibits peeling in the fixing region K1, allowing it to be folded back outward in the front-to-back direction D1, with the fixing region K1 as the folding position. 【0030】 A pair of temporary fixing regions K2 are set along the periphery of the oversheet 10 on both sides of the width direction D2 of the fixed region K1. Each temporary fixing region K2 is located inward in the front-to-back direction D1 from the fixed region K1, that is, between the end of the fixed region K1 in the width direction D2 and the inner edge 10b of the oversheet 10 in the front-to-back direction D1. Note that the temporary fixing regions K2 are set in positions that do not overlap with the non-stretchable region S1 and stretchable region S2 of the gathered sheet 5 when viewed from the stacking direction D3. 【0031】 Furthermore, the oversheet 10 is fixed to the top sheet 2 in the temporary fixing area K2 with a fixing force weaker than that in the fixing area K1, but with a fixing force that allows the oversheet 10 to be peeled off from the top sheet 2. Here, "allowing the oversheet 10 to be peeled off from the top sheet 2" means that when a user grasps and pulls the oversheet 10, the oversheet 10 can be peeled off without damaging the top sheet 2. 【0032】 In Example 1, as shown in Figure 3, the temporary fixing region K2 is provided with a first temporary fixing portion 13, a second temporary fixing portion 14, and an intermittent portion 15. 【0033】 The first temporary fixing portion 13 is provided on the fixed area K1 side of the temporary fixing area K2. The first temporary fixing portion 13 fixes the oversheet 10 to the top sheet 2 with a weaker fixing force than the second temporary fixing portion 14. In Embodiment 1, the first temporary fixing portion 13 is composed of multiple embossed patterns that are spaced at regular intervals and formed by heat fusion. In other words, the first temporary fixing portion 13 fixes the oversheet 10 to the top sheet 2 with the fixing force due to the fusion of each embossed pattern. 【0034】 The second temporary fixing portion 14 is provided on the inner edge 10b side of the oversheet 10 in the front-rear direction D1 within the temporary fixing region K2. The second temporary fixing portion 14 fixes the oversheet 10 to the topsheet 2 with a fixing force that is stronger than the first temporary fixing portion 13 but weaker than the fixing region K1. In Embodiment 1, the second temporary fixing portion 14 is formed by heat fusion and consists of an embossed pattern with a larger area than the embossed pattern formed on the first temporary fixing portion 13. In other words, the second temporary fixing portion 14 fixes the oversheet 10 to the topsheet 2 with a fixing force due to the fusion of the embossed pattern, which has a larger area than the first temporary fixing portion 13. 【0035】 Furthermore, since the oversheet 10 is fixed to the topsheet 2 by heat fusion, the fixing force depends on the size of the area of ​​the embossed pattern formed by heat fusion. In other words, the larger the area of ​​the embossed pattern, the stronger the fixing force. 【0036】 The intermittent section 15 is the part where the oversheet 10 is not fixed to the topsheet 2. As a result, as shown in Figure 4, a gap S is created between the oversheet 10 and the topsheet 2 in the intermittent section 15. The intermittent section 15 is located between the first temporary fixing section 13 and the second temporary fixing section 14 within the temporary fixing area K2, and is positioned along the width direction D2 with respect to the expansion and contraction area S2 of the gathered sheet 5. This allows the gathered sheet 5 to stand upright inside the gap S. 【0037】 Furthermore, the inner edge 10b of the oversheet 10 in the front-to-back direction D1 is not fixed to the top sheet 2. As a result, as shown in Figure 2, a gap is created between the inner edge 10b of the oversheet 10 and the top sheet 2. 【0038】 The function of absorbent article 1 in Example 1 is described below. 【0039】 In Example 1, when the absorbent article 1 is used attached to underwear, the top sheet 2 is facing the user, and the locking portion 7 provided on the non-skin side (back side) of the back sheet 3 is attached to the underwear. At this time, the oversheet 10 is superimposed on one end (front end) of the top sheet 2 in the front-to-back direction D1. Here, the oversheet 10 is fixed to the top sheet 2 in the fixing area K1 with a predetermined fixing force that prevents peeling from the top sheet 2. As a result, in the absorbent article 1 of Example 1, the top sheet 2 is covered with the oversheet 10 on the skin side of one end (front end) in the front-to-back direction D1, and a pocket-like structure is formed with the inner edge 10b in the front-to-back direction D1 separated from the top sheet 2 and opening up. 【0040】 Furthermore, the oversheet 10 is a sheet material in which the first surface 11 facing the topsheet 2 when it is superimposed on the topsheet 2 is hydrophilic, and the second surface 12 opposite to the first surface 11 is water-repellent. As a result, the absorbent article 1 of Example 1 can guide bodily fluids that flow to one end (front end) in the front-to-back direction D1 through an opening in the inner edge 10b of the oversheet 10 which forms a pocket-like structure, into the space between the oversheet 10 and the topsheet 2 (inside the pocket-like structure), and absorb them by the hydrophilic first surface 11 of the oversheet 10 facing the topsheet 2. In addition, the bodily fluids absorbed by the first surface 11 of the oversheet 10 are prevented from seeping out onto the surface (skin side) of the oversheet 10 by the water-repellent second surface 12. As a result, the absorbent article 1 of Example 1 can suppress leakage of bodily fluids from one end (front end) in the front-to-back direction D1 when the oversheet 10 is superimposed on the topsheet 2. 【0041】 Furthermore, the oversheet 10 can be folded back outward in the front-to-back direction D1, with the fixed area K1 as the folding position. That is, after the user attaches the absorbent article 1 of Example 1 to their underwear, they may pinch the inner edge 10b of the oversheet 10 and pull it outward in the front-to-back direction D1 to peel off the temporary fixed area K2 and fold back the oversheet 10 with the fixed area K1 as the folding position. When the oversheet 10 is folded back, as shown in Figures 6 and 7, the length of the absorbent article 1 in the front-to-back direction D1 increases by the amount of the folded oversheet 10. Also, when the oversheet 10 is folded back, the hydrophilic first surface 11 faces the user, and the water-repellent second surface 12 faces the underwear. 【0042】 As a result, in the absorbent article 1 of Example 1, when the oversheet 10 is folded back, the first surface 11 of the oversheet 10 facing the user directly absorbs bodily fluids. In other words, in the absorbent article 1 of Example 1, when the oversheet 10 is folded back, the area that can absorb bodily fluids at one end (front end) in the front-to-back direction D1 can be increased. As a result, even when the oversheet 10 is folded back, the absorbent article 1 of Example 1 can suppress leakage of bodily fluids from one end (front end) in the front-to-back direction D1. 【0043】 Thus, the absorbent article 1 of Example 1 can be used with the oversheet 10 overlapping the topsheet 2, or folded over to the outside in the front-to-back direction D1. This allows the user to choose the usage method that suits their preference when using the absorbent article 1. Furthermore, regardless of the state of the oversheet 10, the absorbent article 1 of Example 1 can absorb bodily fluids that have flowed to one end (front end) in the front-to-back direction D1 of the absorbent article 1. In other words, the absorbent article 1 of Example 1 allows the user to choose the usage method, and regardless of the usage method, it can suppress leakage of bodily fluids from one end (front end) in the front-to-back direction D1. 【0044】 Furthermore, in the absorbent article 1 of Example 1, folding back the oversheet 10 increases the area at one end (front end) in the front-to-back direction D1 that can absorb bodily fluids. Therefore, the absorbent article 1 of Example 1 can prevent leakage of bodily fluids from one end (front end) in the front-to-back direction D1 without increasing the length of the top sheet 2, back sheet 3, absorbent body 4, etc. 【0045】 In other words, the absorbent article 1 of Example 1 can prevent leakage of bodily fluids even without extending the length of the top sheet 2, back sheet 3, absorbent body 4, etc., in the front-to-back direction D1 to the same length as the oversheet 10 when folded back. As a result, the absorbent article 1 of Example 1 can reduce the amount of materials used, such as the top sheet 2 and back sheet 3, thereby reducing the environmental impact. 【0046】 Furthermore, in the absorbent article 1 of Example 1, the fixed area K1 is set along the outer edge 10a of the oversheet 10 in the front-to-back direction D1. Therefore, when the oversheet 10 of the absorbent article 1 of Example 1 is folded back, almost the entire surface of the oversheet 10 can be reversed. As a result, the absorbent article 1 of Example 1 can increase the exposed area of ​​the first surface 11 when folded back compared to, for example, when the fixed area K1 is set in the middle of the oversheet 10 in the front-to-back direction D1. Thus, the absorbent article 1 of Example 1 can increase the amount of bodily fluid absorbed by the oversheet 10 and further suppress leakage of bodily fluid. 【0047】 Furthermore, in the absorbent article 1 of Example 1, a temporary fixing area K2 is set at the periphery of the oversheet 10, between the fixing area K1 and the inner edge 10b of the oversheet 10 in the front-rear direction D1. The oversheet 10 is fixed to the top sheet 2 in the temporary fixing area K2 with a fixing force weaker than that in the fixing area K1, but with a fixing force that allows the oversheet 10 to peel off from the top sheet 2. 【0048】 Therefore, when the absorbent article 1 of Example 1 is used without folding back the oversheet 10, the oversheet 10 remains overlapped with the top sheet 2 without curling, wrinkling, or folding. Furthermore, when the user folds back the oversheet 10, it can be easily peeled off. As a result, the absorbent article 1 of Example 1 prevents deterioration of the user experience, and the user can use the absorbent article 1 in the desired state without discomfort. 【0049】 Furthermore, in the absorbent article 1 of Example 1, a first temporary fixing portion 13 is provided on the fixed area K1 side of the temporary fixing area K2, and a second temporary fixing portion 14 is provided on the inner edge 10b side of the temporary fixing area K2. The first temporary fixing portion 13 fixes the oversheet 10 to the top sheet 2 with a weaker fixing force than the second temporary fixing portion 14. The second temporary fixing portion 14 also fixes the oversheet 10 to the top sheet 2 with a weaker fixing force than the fixed area K1. 【0050】 As a result, the absorbent article 1 of Example 1 has its inner edge 10b in the front-to-back direction D1 of the oversheet 10, which is prone to peeling up due to friction with the user, fixed to the top sheet 2 with a relatively strong fixing force by the second temporary fixing part 14. Therefore, the absorbent article 1 of Example 1 can further suppress the peeling up of the oversheet 10. In addition, the absorbent article 1 of Example 1 can prevent leakage of bodily fluids by suppressing the gap that occurs between the oversheet 10 and the top sheet 2 by the first temporary fixing part 13. Furthermore, since the fixing force of the first temporary fixing part 13 is weaker than the fixing force of the second temporary fixing part 14, the oversheet 10 can be easily peeled off when it is peeled away. 【0051】 Furthermore, in the absorbent article 1 of Example 1, a pair of gathered sheets 5 are provided on the top sheet 2, which stand upright from the top sheet 2 due to the contraction force of the elastic stretch material 5a. Here, each gathered sheet 5 is positioned on both sides in the width direction D2 of the absorbent body 4. Each gathered sheet 5 has non-stretchable regions S1 at both ends in the front-to-back direction D1 where the elastic stretch material 5a is not provided and therefore does not contract, and has stretchable regions S2 in the middle of the front-to-back direction D1 where the contraction force of the elastic stretch material 5a functions effectively and the sheet stands upright due to the contraction force of the elastic stretch material 5a. The oversheet 10 covers the gathered sheets 5, and the fixed region K1 and the temporary fixed region K2 are set in positions that do not overlap with the stretchable region S2 when viewed from the stacking direction D3. 【0052】 As a result, the contractile force (shrinkability) of the elastic stretch material 5a that stretches the gathered sheet 5 is not hindered by the fixing area K1 or the temporary fixing area K2 that fix the oversheet 10 to the topsheet 2. Therefore, the absorbent article 1 of Example 1 can maintain its performance in preventing leakage of bodily fluids by the gathered sheet 5. 【0053】 Furthermore, in the absorbent article 1 of Example 1, the temporary fixing area K2 is positioned along the width direction D2 relative to the expandable area S2 of the gathered sheet 5, and an intermittent portion 15 is provided where the oversheet 10 is not fixed to the top sheet 2. 【0054】 In Example 1, the absorbent article 1 has intermittent sections 15 in the temporary fixing area K2, which reduces the fixing force that secures the oversheet 2 to the topsheet 2 by the temporary fixing area K2, allowing the user to easily peel off the oversheet 10. 【0055】 Furthermore, in the absorbent article 1 of Example 1, intermittent sections 15 are provided at positions aligned along the width direction D2 with respect to the expandable region S2 in which the gathered sheet 5 stands upright from the top sheet 2. Therefore, as shown in Figure 4, the absorbent article 1 of Example 1 allows the gathered sheet 5 to stand upright inside the gap S between the oversheet 10 and the top sheet 2 created by the intermittent sections 15. Thus, the absorbent article 1 of Example 1 can prevent leakage of bodily fluids from the gap S by the upright gathered sheet 5. 【0056】 Furthermore, in the absorbent article 1 of Example 1, a locking portion 7 is provided on the non-skin side of the back sheet 3, which is used to secure it to underwear. The locking portion 7 is positioned to overlap the stretchable area S2 of the gather sheet 5 when viewed from the stacking direction D3. As a result, the absorbent article 1 of Example 1 can conform the top sheet 2 and back sheet 3 to the underwear with the locking portion 7, and the shrinkage of the top sheet 2 and back sheet 3 toward the user due to the contraction force of the elastic stretch material 5a can be restricted. Therefore, the gather sheet 5 can stand up properly relative to the top sheet 2. As a result, leakage of bodily fluids from the gap S in the intermittent portion 15 can be further suppressed. 【0057】 Furthermore, in the absorbent article 1 of Example 1, if the oversheet 10 is made of a sheet material having irregularities on at least the first surface 11, the recessed parts of the oversheet 10 are less likely to come into contact with the user's skin. As a result, the absorbent article 1 can prevent the first surface 11, which has absorbed bodily fluids, from coming into contact with the user and becoming sticky. 【0058】 The absorbent article of the present invention has been described above based on Example 1, but the specific configuration is not limited to Example 1, and changes or additions to the design are permitted as long as they do not deviate from the gist of the invention as described in each claim. 【0059】 In the absorbent article 1 of Example 1, an example was shown in which the oversheet 10 was overlapped with one end (front end) of the top sheet 2 in the front-to-back direction D1. However, the oversheet 10 may also be overlapped with the other end (rear end corresponding to the user's rear side) of the top sheet 2 in the front-to-back direction D1, or it may be overlapped with both ends of the top sheet 2 in the front-to-back direction D1. 【0060】 When the oversheet 10 is placed over the other end of the top sheet 2 in the front-to-back direction D1 (the rear end corresponding to the user's rear), the oversheet 10 can prevent leakage of bodily fluids from the other end of the top sheet 2 in the front-to-back direction D1 (the rear end corresponding to the user's rear). Also, when the oversheet 10 is placed over both ends of the top sheet 2 in the front-to-back direction D1, the oversheet 10 can prevent leakage of bodily fluids from either end of the front-to-back direction D1. 【0061】 Furthermore, in the absorbent article 1 of Example 1, an example was shown in which the fixing area K1 for fixing the oversheet 10 was set along the outer edge 10a of the oversheet 10 in the front-rear direction D1. However, the fixing area K1 can be set at any position on the oversheet 10, as long as it is a position that allows at least a part of the oversheet 10 to be folded back outward in the front-rear direction D1. 【0062】 Furthermore, although the fixed area K1 is set to extend in the width direction D2 in Embodiment 1, it is not limited to this. The fixed area K1 may be set to be arranged continuously along the width direction D2 at regular intervals. Even in this case, the oversheet 10 can be folded back outward in the front-to-back direction D1, with the fixed area K1 as the folding point. 【0063】 Furthermore, in the absorbent article 1 of Example 1, an example was shown in which a temporary fixing area K2 was set at the periphery of the oversheet 10, but the temporary fixing area K2 does not necessarily have to be set. If the temporary fixing area K2 is not set, the oversheet 10 is fixed to the top sheet 2 only by the fixing area K1. 【0064】 Furthermore, in the absorbent article 1 of Example 1, a region is provided between the fixed region K1 and the temporary fixed region K2, which overlaps with the gathered sheet 5, and where the oversheet 10 is not fixed to the top sheet 2. However, the fixed region K1 and the temporary fixed region K2 may be set continuously without any gaps. Also, the fixed region K1 or the temporary fixed region K2 may be set overlapping with the gathered sheet 5, as long as it is in the non-stretchable region S1 of the gathered sheet 5. In other words, in the non-stretchable region S1, there is no elastic stretch material 5a in the gathered sheet 5, so there is no contractile force. For this reason, even if the fixed region K1 or the temporary fixed region K2 is set overlapping with the non-stretchable region S1 of the gathered sheet 5, and the oversheet 10 is fixed to the top sheet 2 in a position overlapping with the non-stretchable region S1, the upright state of the gathered sheet 5 is not hindered. 【0065】 Furthermore, in the absorbent article 1 of Example 1, an example was shown in which an intermittent section 15 was provided between the first temporary fixing section 13 and the second temporary fixing section 14. However, the intermittent section 15 is not necessarily provided, and the first temporary fixing section 13 and the second temporary fixing section 14 may be provided continuously. 【0066】 Furthermore, in Example 1, the absorbent article 1 was shown to be a sanitary napkin intended to absorb bodily fluids such as menstrual blood and vaginal discharge. However, the absorbent article 1 may also be, for example, a urine pad intended primarily to absorb urine. [Explanation of Symbols] 【0067】 1. Absorbent articles 2 Top Sheets 3 Backseat 4 Absorbent 10 Overseat 11 Page 1 12 Side 2 13. First temporary fixing section 14. Second temporary fixing section 15 Intermittent section D1 Anteroposterior direction D2 width direction K1 fixed area K2 Temporary Fixation Area

Claims

[Claim 1] An absorbent article comprising a top sheet, a back sheet, and an absorbent material disposed between them, having a front-to-back direction corresponding to the front and back of the user and a width direction perpendicular to the front-to-back direction, An oversheet is placed over at least one end of the top sheet in the front-to-back direction. On the skin-facing side of the top sheet, a pair of gathered sheets are provided, positioned on both sides in the width direction of the absorbent body and extending in the front-to-back direction, and rising from the top sheet due to the contraction force of the elastic stretch material. The gathered sheet has non-stretchable regions at both ends in the front-to-back direction, and stretchable regions in the middle of the front-to-back direction where the contraction force of the elastic stretch material functions. The oversheet covers the front-to-back ends of the pair of gathered sheets, and is a sheet material in which the first surface facing the top sheet is hydrophilic and the second surface opposite the first surface is water-repellent, and is fixed to the top sheet in the fixing area with a fixing force that inhibits peeling, and is foldable outward in the front-to-back direction with the fixing area as the folding position. A first usage configuration in which the top sheet and the oversheet overlap with a gap between them, and a second usage configuration in which the oversheet is folded back so that the first surface faces the user, are selectable. The fixed region is positioned between the pair of gathered sheets and, when viewed from the stacking direction in which the top sheet, the absorbent, and the back sheet overlap, is set to a position that does not overlap with the non-stretchable region and the stretchable region. An absorbent article characterized by the following features. [Claim 2] In the absorbent article described in claim 1, The fixed area is set along the outer edge of the oversheet in the front-rear direction. An absorbent article characterized by the following features. [Claim 3] In the absorbent article described in claim 1 or claim 2, A temporary fixing area is set between the fixing area and the inner edge of the oversheet in the front-rear direction at the periphery of the oversheet. The oversheet is fixed to the top sheet in the temporary fixing area with a fixing force weaker than that in the fixing area, and which allows for peeling from the top sheet. An absorbent article characterized by the following features. [Claim 4] In the absorbent article described in claim 3, The temporary fixing area has a first temporary fixing portion on the fixing area side, and a second temporary fixing portion is provided on the inner edge side in the front-rear direction of the oversheet. The first temporary fixing portion fixes the oversheet to the top sheet with a weaker fixing force than the second temporary fixing portion, and the second temporary fixing portion fixes the oversheet to the top sheet with a weaker fixing force than the fixing area. An absorbent article characterized by the following features. [Claim 5] In the absorbent article described in claim 3, The temporary fixing region is set in a position that does not overlap with the expansion / contraction region when viewed from the stacking direction. An absorbent article characterized by the following features. [Claim 6] In the absorbent article described in claim 5, The temporary fixing region is provided with intermittent sections in which the oversheet is not fixed to the top sheet, at positions aligned with the width direction relative to the expandable region of the gathered sheet. An absorbent article characterized by the following features. [Claim 7] In the absorbent article described in claim 5, The non-skin side of the back sheet is provided with a locking portion that is secured to underwear during use. The locking portion is positioned so as to overlap the stretchable region of the gathered sheet when viewed from the stacking direction. An absorbent article characterized by the following features. [Claim 8] In the absorbent article described in claim 1 or claim 2, The oversheet is made of a sheet material having irregularities on at least the first surface. An absorbent article characterized by the following features.

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