Absorbent articles

Abstract

To reduce friction with the skin by making an absorbent article securely follow movement of the legs and the hip, and to enable sanitarily disposing a used absorbent article.SOLUTION: A bag body 10 is arranged in a rear part at an outer surface side of a rear surface sheet 2 forming an underwear contact surface. The bag body 10 is connected to the rear surface sheet 2 in a connection part 11 disposed in a rear end part, a front part thereof is not connected to the rear surface sheet 2, and the underwear contact surface of the bag body 10 is disposed with rear part slip-prevention adhesive layers 12, 12, .. intended for slip prevention from an underwear in wearing. When an external force in a width direction acts on the rear part of the absorbent article so that a wearer largely moves the legs and the hip in wearing, the bag body 10 is deformed so as to make the rear part of the absorbent article securely follow the legs and the hip. The bag body 10 can be used as a bag when a used absorbent article is disposed.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to absorbent articles such as sanitary napkins, panty liners, and incontinence pads, and more particularly to absorbent articles in which a bag body is disposed at the rear of an underwear-contacting surface, and an anti-slip adhesive layer is provided on the underwear-contacting surface of the bag body. [Background technology]

[0002] In the case of long napkins such as nighttime napkins or long-lasting napkins, the underwear-contacting surface of the napkin is fixed to the underwear along its entire length, meaning that the napkin does not follow the movements of the legs or buttocks, resulting in significant damage to the skin, such as pain and itching, caused by friction between the skin and the surface of the napkin.

[0003] Additionally, when used napkins were rolled up and disposed of, both sides of the napkin were open, which meant that menstrual blood could leak out, soiling hands and making the inside of the sanitary box unhygienic.

[0004] The following Patent Document 1 discloses an absorbent article in which an anti-slip member is provided on the non-skin side of a main body portion in which an absorbent body is interposed between a surface sheet on the skin side and a back sheet on the non-skin side, the anti-slip member being used to fix the absorbent body to an outer layer, and in which a shear deformation layer made of a foamed resin is provided between the absorbent body and the anti-slip member, and the shear deformation of the shear deformation layer allows a member arranged on the skin side of the shear deformation layer and a member arranged on the non-skin side of the shear deformation layer to shift position relative to each other in the planar direction.

[0005] Furthermore, the following Patent Document 2 discloses an absorbent article comprising an absorbent body and a bag body attached to the non-skin facing side of the absorbent body, the bag body being capable of storing the absorbent body in an internal space formed by turning the bag body inside out, the bag body being attached on the non-skin facing side of the absorbent body at a position including the center of the absorbent body in the longitudinal direction. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2020-156641 A [Patent Document 2] JP 2014-151128 A Summary of the Invention [Problem to be solved by the invention]

[0007] In the absorbent article described in Patent Document 1 above, when the absorbent article is worn, as the wearer changes their posture, such as moving their legs, the outer layer may become twisted or wrinkled, causing the outer layer to shift position relative to the wearer's skin. However, the shear deformation layer undergoes shear deformation, so that the shift in position of the member arranged on the non-skin side of the shear deformation layer does not affect the member arranged on the skin side of the shear deformation layer, and the member arranged on the skin side of the shear deformation layer is maintained in close contact with the wearer's skin. However, because the amount of deformation of the shear deformation layer is limited to a certain level, there was a risk that chafing of the skin could not necessarily be sufficiently reduced when the legs or buttocks were moved significantly.

[0008] Furthermore, in the absorbent article described in Patent Document 2 above, the bag body is not only useful for hygienically disposing of the absorbent main body after use, but also functions as a cushioning member for improving the wearing comfort of the absorbent article even while the absorbent main body is in use. However, since the bag body is fixed to the absorbent main body over its entire surface, it is difficult for it to follow the movements of the legs and buttocks, and the skin is easily rubbed against the absorbent article, causing pain, itching, etc., and damage to the skin cannot be sufficiently reduced.

[0009] Therefore, the main object of the present invention is to provide an absorbent article that can reliably follow the movement of the legs and buttocks, thereby reducing chafing against the skin and allowing the used absorbent article to be disposed of hygienically. [Means for solving the problem]

[0010] In order to solve the above problems, in a first aspect, a bag is disposed at a rear portion of the outer surface side of the back sheet that forms the underwear contact surface, The bag body is joined to the back sheet at a joining portion provided at the rear end portion, and the portion in front of the joining portion is not joined to the back sheet. A slip-prevention adhesive layer is provided on the underwear contact surface of the bag body to prevent slippage of the bag against the underwear when the bag is worn. At the same time, the opening of the bag body is located at the rear of the absorbent article and opens toward the rear. An absorbent article is provided, which comprises:

[0011] In the first aspect, the bag body arranged at the rear part of the outer surface side of the back sheet forming the underwear contact surface is joined to the back sheet at a joint provided at the rear end, and the front part is not joined to the back sheet, and the underwear contact surface of the bag body is provided with a slip-prevention adhesive layer for preventing slippage with the underwear when worn, so that when an external force acts on the rear part of the absorbent article in the width direction by the wearer moving their legs or buttocks significantly when wearing the absorbent article, the bag body deforms, so that the rear part of the absorbent article reliably follows the legs or buttocks, reducing friction between the surface of the absorbent article and the skin surface and suppressing damage to the skin. In addition, when disposing of a used absorbent article, the front end is rolled up and stored in the bag body, so that the absorbent article can be disposed of hygienically in a state in which the entire absorbent article is enclosed.

[0012] Since the opening of the bag body is positioned at the rear of the absorbent article and is arranged to open toward the rear, the range over which the bag body can deform due to the relative movement of the sheets forming the opening increases, allowing the rear part of the absorbent article to follow even larger movements of the body when worn.

[0013] As a second aspect, there is provided an absorbent article according to claim 1, wherein the bag body is made of a stretchable sheet.

[0014] In the above-mentioned second aspect, the bag body is formed from an elastic sheet material so that it can accommodate larger body movements when worn and so that the used absorbent article can be easily stored in the bag body.

[0015] No. 3 According to the embodiment of the present invention, the opening of the bag body is provided forward of the joint. 、2 An absorbent article as described above is provided.

[0016] Above article 3 In the embodiment, the opening of the bag is provided forward of the joint so that the rolled up absorbent article can be easily accommodated in the bag when the used absorbent article is to be disposed of.

[0017] No. 4 According to the embodiment of the present invention, in the rear part of the absorbent article including the bag body, no adhesive layer for preventing slippage with an underwear is provided other than the slip-prevention adhesive layer provided on the bag body. 3 An absorbent article as described above is provided.

[0018] The above 4 In this embodiment, in order to ensure that the rear portion of the absorbent article can move in accordance with the movements of the wearer's body, the rear portion is not fixed to the underwear other than by the anti-slip adhesive layer provided on the bag body. Effect of the Invention

[0019] As described above in detail, according to the present invention, the absorbent article can reliably follow the movements of the legs and buttocks, reducing chafing against the skin and enabling the used absorbent article to be disposed of hygienically. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a partially cutaway development view of a sanitary napkin 1 according to the present invention. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a cross-sectional view taken along line III-III in FIG. [Figure 4] FIG. 4 is a view taken along line IV-IV in FIG. [Diagram 5] FIG. 1 is a plan view of a sanitary napkin 1 in a worn state. [Figure 6] FIG. 2 is a perspective view showing a procedure for disposing of a used sanitary napkin. [Figure 7] FIG. 11 is a back view of a sanitary napkin 1 according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0022] [Basic structure of sanitary napkin 1] As shown in Figures 1 to 4, the sanitary napkin 1 of the present invention comprises a liquid-impermeable back sheet 2 made of a polyethylene sheet or the like, a liquid-permeable top sheet 3 which allows menstrual blood, vaginal discharge, and the like (hereinafter collectively referred to as body fluids) to quickly pass therethrough, an absorbent body 4 made of cotton-like pulp or synthetic pulp sandwiched between the two sheets 2, 3, and side sheets 7 provided on both sides of the skin-contacting surface side over almost the entire length in the front-to-rear direction, and around the periphery of the absorbent body 4, the outer edges of the back sheet 2 and the top sheet 3 are joined at the front and rear edges by a joining means such as hot melt adhesive, heat sealing, ultrasonic sealing, etc., and also at both side edges, the back sheet 2 and the side sheets 7 which extend laterally beyond the absorbent body 4 are joined by a joining means such as hot melt adhesive, heat sealing, ultrasonic sealing, etc., to form flap portions without an absorbent body interposed therebetween. In the illustrated example, the absorbent body 4 is surrounded by an envelope sheet 5 made of crepe paper, nonwoven fabric, or the like in order to maintain the shape of the absorbent body 4 and improve diffusion, but this envelope sheet 5 does not have to be provided. In addition, although not illustrated, a second sheet made of hydrophilic nonwoven fabric or the like having approximately the same shape as the topsheet 3 may be disposed adjacent to the non-skin side of the topsheet 3.

[0023] The structure of the sanitary napkin 1 will be described in more detail below. The back sheet 2 is made of a sheet material such as polyethylene that is at least water-proof, but it is preferable to use a material that is moisture-permeable in order to prevent stuffiness. As the water-proof and moisture-permeable sheet material, a microporous sheet obtained by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching it in a uniaxial or biaxial direction is preferably used. The back sheet 2 may be made of a polylaminated nonwoven fabric obtained by laminating a plastic film and a nonwoven fabric. The front part including the wearer's body fluid discharge part H, which is the non-skin side (outer surface) of the back sheet 2 of the main body part where the absorbent body 4 is interposed, is formed with one or more front part slip-preventing adhesive layers 8, 8... along the napkin longitudinal direction, and three in the illustrated example, so that the sanitary napkin 1 is fixed to the inner surface of the underwear when worn on the body. The back sheet 2 is formed with a surface that contacts the underwear except for the part where the bag body 10 described later is arranged.

[0024] Next, the surface sheet 3 is preferably made of a nonwoven fabric with or without holes, a porous plastic sheet, or the like. The material fibers constituting the nonwoven fabric can be synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, polyamides, regenerated fibers such as rayon or cupra, and natural fibers such as cotton, and nonwoven fabrics obtained by appropriate processing methods such as spunlace, spunbond, thermal bond, meltblown, and needle punch can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of bulk and high compression recovery. When a large number of through holes are formed in the surface sheet 3, bodily fluids are quickly absorbed, and the surface sheet 3 has excellent dry touch. The fibers of the nonwoven fabric may be either long or short fibers, but it is preferable to use short fibers to give the towel cloth texture. In addition, in order to facilitate embossing, it is preferable to use olefin fibers such as polyethylene or polypropylene with a relatively low melting point. In addition, composite fibers such as core-sheath type fibers having a fiber with a high melting point as a core and a fiber with a low melting point as a sheath, side-by-side type fibers, and split type fibers can also be suitably used.

[0025] The absorbent body 4 interposed between the back sheet 2 and the top sheet 3 is composed of, for example, cotton-like pulp and a water-absorbent polymer. The water-absorbent polymer is mixed, for example, as granular powder, into the pulp constituting the absorbent body. Examples of the pulp include chemical pulp obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. Coniferous pulp, which has longer fibers, is more suitable than hardwood pulp in terms of functionality and cost.

[0026] Synthetic fibers may be mixed into the absorbent 4. The synthetic fibers may be, for example, polyolefins such as polyethylene or polypropylene, polyesters such as polyethylene terephthalate or polybutylene terephthalate, polyamides such as nylon, or copolymers thereof, or may be a mixture of two of these. Composite fibers such as core-sheath fibers with a fiber having a high melting point as the core and a fiber having a low melting point as the sheath, side-by-side fibers, and split fibers may also be used. In the case of hydrophobic fibers, it is desirable to use synthetic fibers that have been surface-treated with a hydrophilizing agent so that they have affinity for body fluids.

[0027] In the illustrated example, the width of the top sheet 3 is slightly longer than the width of the absorbent body 4 as shown in the cross-sectional views of Figures 3 and 4, and only covers the absorbent body 4. On the outer side of the top sheet 3, a side sheet 7 separate from the top sheet 3 is provided. Specifically, the side sheet 7 is made of a nonwoven fabric material that has been appropriately treated to be water-repellent or hydrophilic depending on the purpose of preventing the penetration of menstrual blood or vaginal discharge, or improving the feel on the skin. The side sheet 7 may be made of natural fibers, synthetic fibers, regenerated fibers, or the like, and formed by an appropriate processing method. However, it is preferable to use a nonwoven fabric with a low basis weight to provide breathability in order to eliminate stiffness and prevent stuffiness. Specifically, the basis weight is 13 to 23 g / m 2It is preferable to use a nonwoven fabric prepared as above, and in order to reliably prevent the penetration of body fluids, a water-repellent treated nonwoven fabric coated with a silicone-based, paraffin-based, or alkylchromic chloride-based water repellent agent is preferably used.

[0028] 3 and 4, the side sheet 7 is bonded with an adhesive such as hot melt over a portion outside the widthwise intermediate portion from a predetermined inner position to the outer edge of the back sheet 2, and the laminated sheet portion of the side sheet 7 and the back sheet 2 forms side flap portions on both sides of the absorbent body 4 without the absorbent body 4 being interposed. The side flap portions form a pair of left and right wing-shaped flaps W, W at a side position approximately corresponding to the wearer's bodily fluid discharge portion H, which have a larger extension from the side edges of the absorbent body 4 than the front and rear portions, and a pair of left and right hip hold flaps W, W at a position closer to the buttocks (rear portion) than the above, which have a larger extension from the side edges of the absorbent body 4 than the front and rear portions. B , W B The outer surface of the wing-shaped flap portions W, W (the outer surface of the back sheet 2) is provided with an adhesive layer 8a to prevent the wings from slipping, and when the wing-shaped flap portions W, W are attached to the underwear by folding back the wing-shaped flap portions W, W to the opposite side (the back sheet 2 side) at the folding line RL (see FIG. 1) at the base end and wrapping the wing-shaped flap portions W around the crotch of the underwear. B , W B The outer surface side of the diaper (the outer surface side of the back sheet 2) is not provided with an adhesive layer, and is designed to cover the buttocks of the wearer when worn.

[0029] Meanwhile, the inner side portion of the side sheet 7 is folded almost twice, and one or more thread-like elastic, stretchable members 9, 9 in the illustrated example are arranged in a stretched state in the longitudinal middle portion inside this double sheet, with both ends or appropriate positions in the longitudinal direction fixed. At the front and rear ends of this double sheet portion, as shown in Fig. 4, non-standing portions are formed that are laminated by folding back once outward and bonded to the absorbent body 4 side. As a result, as shown in Fig. 3, the range in which the thread-like elastic, stretchable members 9 are arranged in the longitudinal middle portion forms a pair of left and right three-dimensional gathers BS, BS that stand up against the skin due to the contractile force of the thread-like elastic, stretchable members 9.

[0030] As shown in Fig. 1, compressed grooves 6 are formed in an appropriate pattern on the skin contact surface of the topsheet 3. The compressed grooves 6 are recessed grooves formed by compressing the skin contact surface of the topsheet 3 to integrally recess the topsheet 3 and absorbent body 4 towards the backsheet 2. The compressed grooves 6 are provided in pairs on the left and right sides along the longitudinal direction at least on both sides of the region corresponding to the body fluid excretion area H of the wearer.

[0031] [Regarding the bag body 10] As shown in Fig. 2, in the present sanitary napkin 1, a bag body 10 is disposed at the rear portion on the outer surface side of the back sheet 2. The bag body 10 is made of a laminated sheet having an opening in a portion thereof so that an object can be stored therein, and the surrounding edges other than the opening are closed.

[0032] The bag body 10 is joined to the back sheet 2 at a joint 11 provided at the rear end of the sanitary napkin 1, and is not joined to the back sheet 2 further forward. A rear anti-slip adhesive layer 12 is provided on the underwear contact surface of the bag body 10 to prevent it from slipping off the underwear when worn.

[0033] The bag 10 shown in Fig. 2 is made up of a substantially rectangular bag-shaped portion 10A formed by folding a sheet material extending from the rear to the front of the sanitary napkin 1 outward at a middle portion in the front-rear direction of the sanitary napkin 1, with both sides of the folded portion joined at both side seals 13, and an opening 14 opening toward the rear at the rear end, and an extension portion 10B which is continuous with the rear of the bag-shaped portion 10A and is formed by extending the sheet material on the back sheet 2 side constituting the bag-shaped portion 10A to the rear edge of the sanitary napkin 1. The tip of the extension portion 10B is provided with the joint portion 11 which joins the bag 10 to the back sheet 2. It is preferable from a manufacturing standpoint that the bag-shaped portion 10A and the extension portion 10B are formed from a single continuous sheet material, but they may be formed by joining separate sheet materials.

[0034] The bag body 10 is joined to the back sheet 2 only at the joint 11 at the rear end, and is not joined to the back sheet 2 at any other point than this joint 11, so that the front part can move from this joint 11. That is, when the sanitary napkin 1 is worn in an underwear, the front part is fixed to the crotch part of the underwear by the front part slip-prevention adhesive layer 8... and the wing part slip-prevention adhesive layer 8a..., and the rear part is fixed to the rear part of the underwear by the rear part slip-prevention adhesive layer 12..., but since the rear part slip-prevention adhesive layer 12... is provided on the bag body 10 which is fixed to the napkin body only at the joint 11 provided at the rear end, when an external force in the width direction acts on the rear part of the sanitary napkin 1 as a result of the wearer moving her legs or buttocks while wearing the sanitary napkin 1, the bag body 10 deforms, so that the rear part of the sanitary napkin 1 can deform in accordance with the movement of the legs and buttocks. For this reason, compared to conventional sanitary napkins in which the rear portion of the napkin is fixed to the underwear by an anti-slip adhesive layer provided on the outer surface of the backsheet like the front portion, and which are unlikely to follow body movements due to the tensile force of the underwear even when an external force in the width direction is applied to the rear portion of the napkin, the present sanitary napkin 1 greatly reduces friction between the napkin surface and the skin, minimizing damage to the skin. Meanwhile, the front portion of the sanitary napkin 1 is firmly fixed to the crotch portion of the underwear by the front portion anti-slip adhesive layer 8 and the wing anti-slip adhesive layer 8a, so that it fits securely around the wearer's bodily fluid excretion area H, preventing leakage of bodily fluids.

[0035] Furthermore, the bag 10 can also be used as a bag for wrapping a rolled up used sanitary napkin when disposing of the used sanitary napkin, as shown in Fig. 6. The procedure for disposing of a used sanitary napkin is as follows.

[0036] As shown in FIG. 6(A), the used sanitary napkin is removed from the underwear, and rolled up from the front end of the sanitary napkin 1 in the front-rear direction with the skin side facing inward. As shown in FIG. 6(B), once rolled up to the rear end, the bag body 10 is turned over in the front-rear direction with the joint 11 as the base point, and as shown in FIG. 6(C), the opening 14 is opened by hand to accommodate the rolled up used sanitary napkin inside. This allows the used sanitary napkin to be disposed of compactly in a state where it is completely wrapped in the bag body 10, as shown in FIG. 6(C). In this way, with the present sanitary napkin 1, the used sanitary napkin can be disposed of hygienically in a state where it is entirely surrounded by the bag body 10, so that the diffusion of odors is reduced. In addition, since the bag body 10 is fixed continuously to the rear end of the napkin body by the joint 11, it is easy to insert the used sanitary napkin rolled up in the front-rear direction from the front end to the rear end into the bag body 10. Furthermore, the front anti-slip adhesive layer 8... and the wing anti-slip adhesive layer 8a provided on the front part of the outer surface of the back sheet 2 are rolled up inside the rolled up used sanitary napkin, and when it is rolled up to the rear end, there is no adhesive layer on the outer peripheral surface, so when the rolled up used sanitary napkin is inserted into the bag 10, it does not stick to the adhesive layer and can slide smoothly into the bag 10.

[0037] The structure of the bag body 10 will be described in more detail below. The sheet material constituting the bag 10 may be a nonwoven fabric or a plastic sheet, but it is particularly preferable to use a stretchable sheet material. By using a stretchable sheet, the bag 10 can stretch and contract, allowing the rear part of the sanitary napkin 1 to reliably follow larger body movements when worn, and it also makes it easier to store a used sanitary napkin inside the bag 10 through the opening 14, and after storing the used sanitary napkin, the opening 14 is less likely to open, ensuring that a hygienic state and a state in which the diffusion of odors is prevented can be reliably maintained. The stretchable sheet may be a stretchable plastic film or a nonwoven fabric.

[0038] The bag-shaped portion 10A of the bag body 10 may be "gussetless" with no gussets on both sides and the bottom, or may be "gusseted" with gussets on at least both sides. When the gussets are provided, triangular gussets whose width gradually increases from the bottom toward the opening 14 may be provided only on both sides, or gussets of equal width may be provided on both sides and the bottom. When the sanitary napkin 1 is individually packaged, the gussets are folded and stacked. In the case of a short sanitary napkin 1 with a total length (length in the front-to-rear direction) of 29 cm or less, it is preferable to use the bag-shaped portion 10A with a gusset so that the used sanitary napkin can be securely wrapped when discarded, even if the length of the bag body 10 in the front-to-rear direction of the napkin is shortened.

[0039] The bag 10 may be formed by folding back one sheet material as described above, or may be formed by joining two or more sheets. For example, the bag-shaped portion 10A may be formed by laminating a separate sheet material constituting an underwear contact surface on the outer surface side of the sheet material arranged on the back sheet 2 side and joining the peripheral edges. In this case, a stretchable sheet may be used as the sheet material on the back sheet 2 side to increase the deformability of the bag 10, and an ordinary nonwoven fabric or plastic sheet may be used as the sheet material on the outer surface side to increase the fixation of the rear portion slip-preventing adhesive layer 12 to the underwear.

[0040] The width dimension of the bag 10 (the length in the width direction of the napkin) is preferably 70 to 90% of the maximum width of the unfolded sanitary napkin 1 shown in Figure 1 or Figure 2. This allows the used sanitary napkin to be securely accommodated inside the bag 10 even when rolled up with the flap portions unfolded to the side.

[0041] The opening 14 of the bag 10 is preferably located at the rear of the sanitary napkin 1 and is provided so as to open toward the rear of the sanitary napkin 1. This improves the deformability of the bag 10 by relative deformation between the sheet material on the back sheet 2 side and the sheet material on the outer surface side that constitute the bag-shaped portion 10A stacked at the opening 14, and allows the napkin rear portion to follow larger body movements. In addition, when disposing of a used sanitary napkin, it is easy to store the rolled up used sanitary napkin inside the bag 10. On the other hand, although not shown, the opening 14 may be provided at the front end of the napkin and be arranged so as to open toward the front of the sanitary napkin 1. In this case, when disposing of a used sanitary napkin, the bag 10 is turned inside out from the opening 14 to wrap the used sanitary napkin that has been rolled up to the rear end.

[0042] The joining portion 11 that joins the bag body 10 to the backsheet 2 is provided only at the rear end of the bag body 10, and not further forward. By providing the joining portion 11 only at the rear end and leaving the portion further forward as a non-jointed region, this non-jointed region becomes a deformation region, and most of the bag body 10 can move relative to the napkin body.

[0043] 2, the joint 11 is formed to extend in the width direction of the sanitary napkin 1 along the rear edge of the bag 10, and its width dimension A, i.e., the length dimension in the front-to-rear direction of the sanitary napkin 1, is at its maximum 10 mm or more, preferably 10 to 30 mm. By making the width dimension A 10 mm or more, it is possible to ensure a certain level of joint strength to the napkin body, and to prevent peeling of the joint 11 due to deformation of the bag 10.

[0044] The planar shape of the joint 11 may be a substantially partial circular shape in which the rear outer contour is a curve that follows the curved outer contour of the sanitary napkin 1 that bulges out towards the rear of the napkin and the front outer contour is a straight line extending in the width direction of the sanitary napkin 1, as shown in Fig. 2, or the rear edge of the bag body 10 may be formed into a curved belt of substantially equal width extending substantially along the width direction of the sanitary napkin 1, as shown in Fig. 7. The joint 11 may be formed only in the middle part of the bag body 10 in the width direction, and no joint may be provided on both sides, so that the bag body 10 can be easily deformed, or may be formed over the entire width of the bag body 10. If the joint 11 is formed only in the middle part, it is preferable that the length of the joint 11 in the napkin width direction is at least 50 to 120 mm.

[0045] The joint 11 may be provided only in the area of ​​the rear flap where the absorbent body 4 is not present, as shown in Fig. 2, or may be provided across the area where the flap and the absorbent body 4 overlap in the thickness direction (not shown). If the joint 11 is provided only in the flap, the napkin body is more likely to deform in accordance with the body because the rigidity of the napkin body in the area where the joint 11 is provided is not very high. On the other hand, if the joint 11 is provided across the area where the absorbent body 4 is present, the rigidity of the area where the absorbent body 4 is present suppresses deformation of the joint 11, and peeling of the joint 11 can be prevented.

[0046] The opening 14 of the bag 10 is provided forward of the joint 11. That is, the opening 14 is provided at a position spaced from the joint 11 to the front of the napkin. In other words, the opening 14 is provided in front of the joint 11 via a non-jointed portion where the bag 10 is not joined to the backsheet 2. By providing the opening 14 at a distance from the joint 11 to the front of the napkin, there is some play between the joint 11 and the opening 14, making it easier to store a rolled-up used sanitary napkin into the bag 10 through the opening 14.

[0047] 2, in the present sanitary napkin 1, the anti-slip adhesive layers provided on the main body portion between which the absorbent 4 is interposed are separately arranged in a front portion including the wearer's body fluid excretion area H, and a rear portion including the bag body 10. That is, in the front portion, the front anti-slip adhesive layer 8 is arranged on the outer surface of the backsheet 2, and in the rear portion, the rear anti-slip adhesive layer 12 is arranged on the outer surface of the bag body 10.

[0048] The rear portion of the sanitary napkin 1 including the bag body 10 does not have any adhesive layer for preventing slippage relative to the underwear, other than the rear portion slip-prevention adhesive layer 12... provided on the bag body 10. This allows the rear portion of the sanitary napkin 1 to move reliably following the movement of the wearer's body. The rear portion slip-prevention adhesive layer 12... is provided in an area not joined to the back sheet 2 of the bag body 10, and is provided in the widthwise center of the outer surface (underwear contact surface) of the bag-shaped portion 10A overlapping with the absorbent 4.

[0049] 2, the rear portion anti-slip adhesive layer 12 is provided at a predetermined distance B forward of the joint portion 11. The larger this distance B is, the greater the range over which the rear portion of the napkin can deform when worn, but if it is too large, the stability of the rear portion of the napkin decreases, and conversely, the fit may worsen. Therefore, the optimum range for the distance B is 10 to 50 mm, preferably 10 to 30 mm.

[0050] However, during the process of putting a newly opened sanitary napkin 1 into an undergarment, since the bag body 10 is only joined to the napkin body at the joining portion 11 provided at the rear end, the non-jointed area of ​​the bag body 10 may flutter and be difficult to fix to the underwear. As a countermeasure to this, a temporary fastening means may be provided for temporarily fastening the front portion of the bag body 10 to the napkin body. The temporary fastening means has a bonding strength that allows it to be easily released by external forces caused by the movement of the legs and buttocks while wearing the sanitary napkin 1, and can be constituted by an adhesive layer with a weak bonding strength, or a nonwoven fabric piece with both ends bonded to the bag body 10 and the napkin body, respectively, and an easily breakable portion such as a perforation in the middle. [Explanation of symbols]

[0051] Reference Signs List 1... sanitary napkin, 2... back sheet, 3... top sheet, 4... absorbent body, 5... covering sheet, 6... compression groove, 7... side sheet, 8... front portion anti-slip adhesive layer, 9... thread-like elastic stretchable member, 10... bag body, 10A... bag-shaped portion, 10B... extension portion, 11... joint portion, 12... rear portion anti-slip adhesive layer, 13... both side seal portions, 14... opening

Claims

1. A bag body is disposed at a rear portion of the outer surface side of the back sheet forming the underwear contact surface, The bag body is joined to the back sheet at a joint provided at the rear end, and is not joined to the back sheet further forward, and an anti-slip adhesive layer is provided on the underwear contact surface of the bag body to prevent it from slipping off the underwear when worn, and an opening of the bag body is located at the rear of the absorbent article and opens toward the rear.

2. 2. The absorbent article according to claim 1, wherein the bag body is made of a stretchable sheet.

3. 3. The absorbent article according to claim 1, wherein the opening of the bag body is provided forward of the joint portion.

4. The absorbent article according to any one of claims 1 to 3, wherein a rear portion of the absorbent article including the bag body does not have any adhesive layer for preventing slippage relative to an undergarment, other than the slip-prevention adhesive layer provided on the bag body.

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