TWI379668B - Absorbent article - Google Patents

Description

1379668 IX. Description of the Invention: [Technical Field] The present invention relates to an absorbent article which can be absorbed by body fluids, including menstrual sanitary napkins and incontinence pads. [Prior Art] The present applicant has proposed an absorbent article having a trapezoidal shape formed on the surface layer side of the absorbent layer and a leak-proof wall standing adjacent to the left and right edges of the absorbent layer (JP2002_000656A) ). The leakage preventing wall has a base wall and an inner projecting portion and an outer projecting portion which extend from the upper portion of the base wall portion to the inside and the outside of the absorbent article, respectively. An elastic member is disposed on the inner projecting portion and the outer projecting portion along the longitudinal direction thereof. The inner projection is located above the absorbent layer and outside of the leak-proof groove. The leak-proof groove has an approximately elliptical shape and a closed shape having a long axis in the longitudinal direction of the absorbent article. The absorbent article has high suitability and is effective in preventing liquid leakage. Moreover, when the wearing pressure causes the clogging of the leakage preventing wall, the liquid leakage can be effectively prevented. In addition to the above-mentioned absorbent article, there is known an absorbent article in which a shape of a leak preventing groove is formed around a blood-storing mouth portion of a wearer to form a leak-proof groove having a closed shape (JP2001-095842A). The leakage preventing groove has bulging embossing portions that bulge outward in the width direction on both sides of the blood discharge port portion of the wearer. On the outer side of the embossed portion, a pleated cuff extending in the longitudinal direction of the absorbent article is provided. If the pleats are shrunk, the absorbent body will contract in the longitudinal direction by its contraction force. By this contraction, the embossed embossed portion is inflated on the side of the wearer's blood discharge port. That is, in the absorbent article • J is absorbed by 114264.doc 1379668

The body shrinks in the longitudinal direction, and a high A is formed in the absorbent body. However, the absorbent article is not a leak-proof wall having an inner extension and an outer projection as previously described. With regard to the formation of the middle and high portions, it is proposed to use the compressive force applied to the absorbent article in the lateral direction when wearing the absorbent article, so that the longitudinally elongated region is raised to the wearer's skin side so as to be in close contact with each other. In the wearer's body, the second absorbent article (JP2004_181084A) e has a closed-shaped leak-proof groove in the absorbent article, but the leak-proof groove is not formed on both sides of the wearer's blood-sucking portion. Said to bulge the embossing department. In addition to the above-mentioned techniques, it is known that absorbent articles such as menstrual sanitary napkins and incontinence pads are disposed outside the width direction, and P-leakage walls are disposed along the longitudinal direction (US5921975A). The leakage preventing wall is intended to deform the absorbent article into a shape suitable for the wearer's good three-dimensional shape, and to improve the adhesion to the wearer's skin and to prevent leakage. However, in the menstrual sanitary napkin disclosed in US 592 1975 A, since the side of the absorbent body is covered with the liquid permeable top sheet, and the leakage preventing wall is disposed outside the width direction thereof, there is a body fluid flowing to the skin contacting side of the top sheet. Or the body fluid absorbed by the absorbent body temporarily leaks into the space between the top sheet and the leakage preventing wall, so that the side leakage resistance is not sufficient. Further, there is a case where the space between the top sheet and the leakage preventing wall may be broken due to wearer movement or the like, and direct contact of the top sheet with the leakage preventing wall may cause body fluid to penetrate into the leakage preventing wall. SUMMARY OF THE INVENTION The present invention provides an absorbent article having a leakage preventing groove extending to the longitudinal direction of each of the left and right side portions of the surface layer side 114264.doc 1379668 and located outside each of the leakage preventing grooves 8 and The leakage preventing wall extending in the longitudinal direction is characterized in that: the leakage preventing wall has a base wall portion and a skin contacting surface extending in a horizontal direction from an upper end of the base wall portion, the skin contacting surface being disposed in an extended state An elastic member extending in the longitudinal direction of the leakage preventing wall; a portion of each of the leakage preventing grooves facing the excretion portion of the wearer is bent outward in a width direction toward the outside of the absorbent article. [Embodiment] The present invention provides an absorbent article which can effectively utilize not only the absorbent surface between the leakage preventing walls but also the absorbent surface on the skin side of the wearer. Moreover, the present invention provides an absorbent article which can further improve side leakage prevention in an absorbent article having a leakage preventing wall. Hereinafter, the present invention will be described with reference to the drawings in accordance with preferred embodiments of the invention. Fig. 2 is a plan view showing the menstrual sanitary napkin as an embodiment of the absorbent article of the present invention as seen from the top sheet side, and Fig. 2 is a cross-sectional view taken along line 。 and ΙΙ in Fig. 1. As shown in Fig. 1 and Fig. 2, the menstrual sanitary napkin 1 of the present embodiment has a vertically long shape, and has a top sheet 2 as a liquid-permeable surface layer 2 and a back sheet 3 as a liquid-impermeable back layer. And an absorber 4 as a liquid retentive absorbing layer between the top sheet 2 and the back sheet 3. On the left and right side portions of the top sheet side of the sanitary napkin 1, a pair of leakage preventing walls 5, 5 are provided along the longitudinal direction thereof. The leakage preventing walls 5 are respectively raised from the left and right edges of the absorbent body 4. Further, when referring to "longitudinal direction" and "width direction", unless otherwise specified, it means "the length direction of the absorbent article and the "width direction of the absorbent article". When referring to "above" and "below", it means "skin contact surface (the side of the side)" and "non-skin contact surface (the side of the side)". The sanitary napkin 1 can be divided into: an excretion portion facing portion A as a portion opposite to the wearer's excretion portion when worn; adjacent to the excretory portion opposing portion A and before the front and rear of the sanitary napkin 1, respectively Square B and rear c. The top sheet 2 covers the entirety of the absorbent body 4 and extends from the side edges of the absorbent body 4 and is wound onto the side of the back sheet. The top sheet 2 may be composed of the same material as previously known. For example, a hydrophilic nonwoven fabric or an apertured film or the like may be used. The back sheet 3 may be composed of, for example, a liquid impervious film sheet (preferably a water vapor permeable and liquid impervious film sheet). The absorbent body 4 can be constituted, for example, by coating a mixture of fluff pulp and particles of a superabsorbent polymer with toilet paper. The back sheet 3 extends outward from the side edge of the absorbent body 4, and a pair of side flap portions 72 are formed at the position of the opposing portion A of the excretory portion of the sanitary napkin 1. Further, although not shown in the figure, the adhesive sheet for fixing the napkin 1 to the garment is formed on the garment facing surface of the back sheet 3 and the side flap portion 72. This adhesive layer is protected by a release paper (not shown). The top sheet 2 and the back sheet 3 respectively extend from the front end of the absorbent body 4, and the end sheet 2 and the back sheet 3 which are extended are joined to each other to form an end seal portion 7. The leakage preventing wall 5 disposed on the left and right sides of the sanitary napkin 1 is formed by processing a piece of strip-shaped thin film 114264.doc ^/9668 into a sleeve shape and having a τ shape. The leakage preventing wall 5 has a base wall portion 5a. The base wall portion 5a has a fixed end and an upper end in a free state, and the fixed end rises from the back sheet at a position slightly outside the side edge of the absorbent body 4. The leakage preventing wall 5 further has a skin contact surface portion 5be. The skin contact surface portion 5b is a planar portion extending from the upper end of the base wall portion 5a in the horizontal direction. Skin contact • The face 5b protrudes in the width direction of the sanitary napkin 1 to the inside and the outside at the same stretching amount. The skin contact face 5b extends through the sanitary napkin! The length φ is the whole direction. The skin is in contact with the outside of the face, especially at the position of the opposing portion a of the excretory portion. An approximately flat surface substantially parallel to the skin contacting surface of the sanitary napkin 1 is formed. The skin contact surface portion 5b is in a state of wearing the sanitary napkin 1, and the surface thereof is in surface contact with the wearer's skin. In the skin contact surface portion 5b, a plurality of elastic members 5c extending in the longitudinal direction of the leakage preventing wall 5 are disposed. The constituent material of the elastic member is not particularly limited as long as it is generally used for sucking articles. For example, it is preferred to use a foam of a polyolefin type and a polyamine g, a natural rubber or the like. Elastic portion • The shape of the piece 5<: may be a filament shape, a ribbon shape, a film shape or the like. In the present embodiment, a filament-shaped elastic member is used. The elastic material is disposed at least in the opposite portion of the drain portion of the sanitary ware, and the elastic member (four) is stretched into the sheet forming the leakage preventing wall 5, and the heat sealing method (heats' or hot melt (1 - The elongation of each elastic member 5e is substantially the same. In the natural state of the sanitary napkin 1, the leakage preventing wall is surely erected by the contraction of the elastic member 5C. According to the leakage preventing wall 5 of such a structure, The upper surface of the skin contact surface opening P 5b is elastically and closely adhered to the wearer's thigh portion. The result is that it is difficult to be displaced by the wearer's activity, such as 114264.doc 1379668 shifting or the like. In addition, even if the leakage preventing wall 5 is likely to fall to the inside due to the movement of the wearer, the leakage preventing wall 5 is provided by the tension of the elastic member disposed outside the width direction. The force of tilting to the outside acts to 'actually prevent the leakage preventing wall 5 from falling backwards. The result is 'to maintain the skin contact surface 5b to a high level of tightness to the thigh. In particular, by elasticity The component 5c is disposed on the skin contact face 5b Near the free end of the left and right, in the horizontal direction of the skin contacting surface 5b of the more stable projected, and said surface sealing effect is further improved.

The leakage preventing wall 5 is fixed to the top sheet 2 at a position of the front portion b and the rear portion c, and a portion of the skin contacting surface portion 5b extending inwardly. The position of the skin contact surface portion 5b at the opposing portion of the excretory portion is not fixed to the top sheet 2. Thereby, the position of the leakage preventing wall 5 at the opposite portion of the drain portion becomes easier to stand up, and the back sheet side of the sanitary napkin 1 is curved into a convex shape to form a sanitary napkin overall/cr wearer shape) . As a result, the upper surface of the skin contact surface is more stably adhered to the thigh of the wearer, and the face sealing effect is further exhibited. In particular, according to the present embodiment, when the side flap portion 72 is provided outside the rising position of the leakage preventing wall 5, the folding of the side flap portion causes the base end position of the leakage preventing wall 5 in the wearing state of the sanitary napkin. The force that is stable to the outside acts to widen the liquid accommodation area of the sanitary napkin 1 facing the skin side. The force of the base end of the leakage preventing wall 5 is stabilized by the external force, and the front and rear ends of the skin contacting the fabric are fixed to the front and rear ends of the length of the sanitary napkin, and the wearer's thigh is prevented from moving. The skin of the wall 5 is hard to be affected outside the face and is stable in a planar shape. Further, the liquid accommodating area on the side of the skin surface is further enlarged. The longer the length of the sanitary napkin is 114264.doc, the greater the distance between the positions where the front and rear ends of the skin contacting face 5b are fixed, and thus the influence of the wearer's A leg activity is reduced. As a result, a more favorable effect can be obtained. On the top sheet side of the sanitary napkin 1, leakage preventing grooves 8, 8 extending in the longitudinal direction of the sanitary napkin 1 are formed on both side portions thereof. Each of the leak preventing grooves 8 is formed by pressing and integrating the top sheet 2 and the absorber 4 from the top sheet side by a pressing method such as embossing. Each of the leak preventing walls 5 previously described is located on the outer side of each of the leak preventing grooves 8. Each of the leak preventing grooves 8 has a substantially symmetrical shape with respect to the longitudinal center line of the sanitary napkin 1. The front and rear ends of each of the leak preventing grooves 8 are connected to each other, thereby forming a closed shape as a whole. The portion of each of the leakage preventing grooves 8 located at the opposing portion a of the drain portion is curved outwardly in the width direction of the sanitary napkin i (hereinafter referred to as the central curved groove 8a) «The central curved groove 8a is before and after The front groove 8b and the rear groove 8 are formed to extend forward and backward in the longitudinal direction of the tampon, and the leakage groove 8 including the central curved groove 8a and the front groove extending from the front and rear, and the rear groove are penetrated through the sanitary napkin 1 The front groove rib and the rear groove 8C are bent in the same manner as the center curved groove 8a, and are bent outward in the width direction of the sanitary napkin 1. As a result, each of the leakage preventing grooves 8 is in the center curved groove 8a and the front. The connecting portion of the groove 8b has a constricted portion 9a at the position of the connecting portion. In addition, the constricted portion 9b is provided at the position of the connecting portion between the central curved groove 8a and the rear groove 8C. As shown in Fig. 2, in the sanitary napkin 1, When viewed in the width direction, there is a difference in thickness between the leakage preventing grooves 8 and 8 and the absorber 4 on the outer side of the leakage preventing groove 8. As is apparent from Fig. 2, compared with the outer side of the leakage preventing groove 8, Between the leak-proof grooves 8, 8 'that is the closed shape of the leak-proof groove 8 The thickness of the region is further increased by 114264.doc •12·1379668. In the present embodiment, 'the absorbent body 4 is the same as the constituent material of the absorbent body 4 and the leakage preventing grooves 8 and 8 and the outside of the leakage preventing groove 8 The difference in thickness corresponds to the difference in basis weight of the absorbent body 4. That is, in the sanitary napkin 1, the absorbent body 4 between the leakage preventing grooves 8, 8 and the absorbent body 4 located outside the leakage preventing groove 8 are at the basis weight. There is a difference in that the basis weight of the absorber 4 located between the leakage preventing grooves 8 and 8 is higher than that of the absorber 4 located outside the leakage preventing groove 8. As a result, in the sanitary napkin 1, it is located outside the leakage preventing groove 8. In the edge region, the region surrounded by the leakage preventing groove 8 has a more bulging shape. According to the sanitary napkin 1 of the present embodiment having the above structure, in the wearing state of the sanitary napkin 1, it is caused by the wearer's activity. When the compressive force in the lateral direction is applied to the sanitary napkin 1, the respective leak-preventing walls 5 become difficult to approach each other. That is, as the surface of the top sheet side of the absorbent surface of the sanitary napkin 1, it is difficult for the respective leak-proof walls 5' to be particularly It is difficult to cover by each skin contact surface portion 5b. As a result, the absorption surface can be effectively utilized and The reason for the leakage prevention is that the leakage preventing groove 8 located in the opposing portion A of the excretion portion of the sanitary napkin 1 forms a central curved groove that is curved outward in the width direction of the sanitary napkin 1 ". In detail, When the compressive force from the transverse direction is applied to the sanitary napkin 1, the compressive force is dispersed in the arcuate direction of the central curved groove 8a in the longitudinal direction of the groove, so that it is difficult to conduct to the inside of the absorbent body 4. As a result, as shown in Fig. 3 In the middle mode, the central bending groove 8a is the starting point of the bending. The sanitary napkin 1 is easily bent into a mountain shape. In particular, if the constricted portions 9a and 9b are formed before the central curved groove 8a, the self-transverse The compressive force applied to the sanitary napkin 1 in the direction can be more effectively transmitted to the longitudinal direction of the central curved groove 8a, so that the sanitary napkin 1 becomes more surely bent in the lateral direction when the central curved groove 8& . 114264.doc 1379668 The original sanitary napkin i shown in FIG. 4, that is, the leakage preventing groove 8' located at the opposite portion A' of the excretory portion is not curved outwardly and curved into a convex shape. When the compressive force in the lateral direction is applied to the sanitary napkin i, as shown schematically in Fig. 5 (4), the sanitary napkin i is easily bent into a valley shape as the starting point of the bending. In the case where the shape of the shape is obvious, as shown schematically in Fig. 5(b), pleats are generated on the skin contact face 讣| of the leakage preventing wall 5, and the face sealing effect of the skin contacting the face 5b Will decrease. The reason why the phenomenon shown in Figs. 5 (4) and (8) is caused is that the leakage force can not be prevented from being applied to the sanitary napkin 1 in the lateral direction by the leakage preventing groove 8 and the compression force is transmitted to the inside of the absorbent body 4 . . This phenomenon is particularly noticeable when the leakage preventing groove 8 located in the opposing portion A of the excretory portion faces the width direction and the inner portion becomes narrow. As described above, the sanitary napkin of the present embodiment is characterized in that it is provided in the sanitary napkin having the leakage preventing wall 5 having the skin contact surface portion 5b stretched in the horizontal direction from the distal end of the base wall portion 5a. The leakage preventing groove 8 of the opposing portion a of the excretion portion is curved outward in a width direction of the sanitary napkin. According to the sanitary napkin 1 of the present embodiment, the leakage preventing wall 5 having the skin contact surface portion 5b can solve the problems unique to the case of using the leakage preventing wall 5 without the advantages described above. Therefore, in the sanitary napkin including the leakage preventing wall having no skin contact surface portion 5b, even if the leakage preventing groove 8 which is curved outward in the width direction of the sanitary napkin is formed, that is, the central curved groove 8a cannot be used. The remarkable effect exhibited by the sanitary napkin 1 of the present embodiment. In the sanitary napkin 1 of the present embodiment, as shown in FIG. 3, the sanitary napkin is easily folded into a mountain shape with the central examination groove 8a as a starting point, so that the absorption surface, that is, the surface on the top sheet side can stabilize the ridge. And close to the wearer's body. As a result, 114264.doc •14·, the suitability of the sanitary napkin 1 is improved, and the leakage prevention effect is further improved. In particular, the portion of the absorbent body 4 that is raised in the absorbent body is surrounded by the leak-proof groove 8 of a closed shape, so that the surface shape stability of the portion is further improved. As a result of the study by the inventors of the present invention, it has been found that the basis weight of the absorber 4 located between the leak preventing grooves 8 and 8 can be increased in order to effectively bulge the absorption surface more stably. As previously described, the absorber 4 located between the leak preventing grooves 8, 8 has a high basis weight, but if the basis weight is 300 to 1500 g/m2, especially 50 (^200 g/m2, the absorption surface can be made Further, the basis weight of the range is advantageous from the viewpoint that the sanitary napkin 1 becomes the starting point of the bending by the central curved groove 8a by the pressure applied from the side portion of the sanitary napkin 1. It is easy to be placed on the side of the body. Furthermore, in the range of 3〇〇~9〇〇g/m2 in the range of the above-mentioned basis weight, the effect of forming the starting point of bending is mainly in the range of 900~1500 g/m2. In addition to the effect of forming the starting point of the bending, the intermediate portion is slightly deformed into a drum shape and becomes easy to bulge. The basis weight of the absorber 4 between the leakage preventing grooves 8 and 8 is as described above, On the other hand, the absorbent body located outside the leakage preventing groove 8 is obtained from the viewpoint of making the absorption surface swell more stably, and the center curved groove 8a as the starting point of bending to make the sanitary napkin 1 easy to be pushed toward the body side. The basis weight of 4 is preferably 1 〇〇~400 g/m2, especially preferably 150~300 g/m2. From the same point of view' In the absorbent body 4, in the region where the high basis weight is obtained, it is preferred that the contour of the region coincides with the shape of the leakage preventing groove 8 forming the closed shape when the absorbent body 4 is viewed in plan. In order to constitute the absorbent body 4 in this manner, For example, the absorber 4 can be made into a two-layer structure in which the lower layer absorber and the upper layer absorber are laminated thereon, and the leak-proof groove 114264.doc •15·1379668 is formed along the outline of the upper-layer absorber. In view of the above, the central curved groove 8a is preferably as shown in Fig. 6, as the length l of the line segment connecting the front and rear contraction portions and 91), and the distance D between the line segment and the apex of the central curved groove 8a. The ratio l/d is 2-5 to 20, and particularly preferably 5 to 15. Regarding the value of L&D itself, [preferably 5 〇 ~ particularly preferably 6 〇 ~ 8 〇 mm; D is preferably $ 〜 2 〇 mm, particularly preferably 5 to 10 mm. As shown in FIG. 2, the fixed state of the fixed end of the base wall portion 53 of the leakage preventing wall 5 can be fixed not only by the two sides of the sheet constituting the leakage preventing wall 5 extending outward from the lower portion of the absorber 4; It can also be as shown in Fig. 7 (a) and Fig. 7 (b). In Fig. 7(a), the both side portions of the sheet constituting the leakage preventing wall 5 extend from the fixed end of the base wall portion 5a toward the edge portion of the sanitary napkin. In Fig. 7A)), one side of the sheet constituting the leakage preventing wall 5 extends from the fixed end of the base wall portion 5a toward the absorbent body 4, and the other side portion of the sheet is from the base wall portion 5a. The fixed end extends toward the edge of the sanitary napkin. Next, another embodiment of the present invention will be described with reference to Figs. 8 to 19'. In the other embodiments, the differences from the previously described embodiments will be described, and the description of the same points will be omitted. In particular, for the unexplained points, the description of the previously described embodiments can be suitably used. The menstrual sanitary napkin of the embodiment shown in Figs. 8 to 10 has a liquid-permeable top sheet 2, a liquid impervious or liquid-impermeable back sheet 3, and a liquid-retaining absorbent body 4. The absorbent body* is interposed between the top sheet 2 and the back sheet 3. U4264.doc -16 - 1379668 The menstrual sanitary napkin 1 has, in the longitudinal direction thereof, a sump portion facing portion A which is a portion of the liquid discharge portion that is disposed opposite to the wearer when worn, and is disposed at the drain portion when worn. The opposing portion A is closer to the rear portion C, the front end portion B, and the rear end portion C of the wearer's back side (rear). The boundary between the opposing portion A and the rear portion C of the excretory portion of the present embodiment is located at a substantially central portion in the longitudinal direction of the menstrual napkin i. As shown in Fig. 10, the absorber 4 has a two-layer structure composed of an upper layer suction body 41 and a lower layer absorber body 42. The upper absorbent body 41 has a shorter length and a narrower width than the lower absorbent core 42. Further, the upper layer absorbent body 41 is not joined to the lower layer absorbent body 42, and is located at the central portion in the longitudinal direction of the menstrual napkin 1 and is located at the central portion in the width direction. Therefore, the upper layer absorber 41 forms a so-called medium-high region. As shown in Fig. 9, the sanitary napkin 1 is formed at a portion located in the opposing portion A of the excretory portion, and is formed with a central curved groove 8a which is curved outward in the width direction of the sanitary napkin 1. The central curved groove 8a extends forward and backward to the front and rear of the sanitary napkin, and forms a front groove 8b and a rear groove 8c, respectively. The leakage preventing groove formed by the central curved groove 8a and the front groove 8b and the rear groove 8c extending from the front and rear thereof extends to substantially the entire length of the sanitary napkin 1. The front groove 8b and the rear groove 8c are curved in a convex shape so as to face the outer portion in the width direction of the sanitary napkin 1 in the same manner as the central curved groove 8a. As a result, a constricted portion 9a is formed at a position where the central curved groove 8a and the front groove 8b are connected. In addition to the ratio, a contraction portion 9b is formed at a position where the central curved groove 8a and the rear groove 8c are connected. As shown in Figs. 8 to 10, each of the grooves 8a, 8b, and 8c is formed by integrally pressing the top sheet 2 and the lower absorbent body 42 of the absorbent body 4, and surrounds the upper layer 114264.doc 1379668. Each of the grooves 8a, 8b, and 8 is connected to the four sheets 2 of the m portion and the lower layer absorber 42. 'But the top portion 2 is not joined to the upper layer absorber 41. Also, in the plan view, the outer layer of the upper layer absorber 41 is shaped to be substantially the same as the outer layer of the valleys 8a, 8b, and 8c. Therefore, the upper layer absorber The 41 series seals the closed space formed by the top sheet 2 and the lower layer absorber 42. The top sheet 2 covers the entire area of the skin contacting side of the absorbent body 4, but does not cover the side surface 43. The top sheet 2 is liquid. The permeable sheet is not particularly limited, and may include, for example, a embossed sheet having a plurality of convex portions 24 protruding from the side of the skin contact surface as illustrated. In the present embodiment, the top sheet 2 including the uneven sheet 2 U skin The first fiber layer 21 on the contact surface side and the second fiber layer 22 on the non-skin contact surface side are formed. The second fiber layer 21 and the second fiber layer 22 are partially thermally welded to form the heat fusion portion 23. The second fiber layer 21 is formed. A plurality of convex portions 24 having compressive elasticity are formed in portions other than the heat-welded portion 23. The uneven-shaped sheets are attached to the i-th fiber layer 2 1 and the second fiber layer 22 containing the fiber assembly, and are specifically embossed by heat embossing. Partial thermal fusion of the pattern Further, the second fiber layer 22 is obtained by heat-shrinking in the horizontal direction. In detail, heat fusion by hot embossing can be performed, for example, by: arranging a plurality of embossing pins in a regular manner The flower surface (the circumferential surface of the embossing roll, etc.) is pressed against the first fiber layer 21 side of the laminate of the first fiber layer 21 and the second fiber layer 22, and is pressed against the respective needles to make the first The constituent fibers of the first fiber layer 22 and/or the second fiber layer 22 are melted. The heat shrinkage of the second fiber layer 22 is carried out, for example, by forming the second fiber layer 22 or the second fiber with heat-shrinkable fibers in advance. The layer 22 contains heat-shrinkable fibers, and the first fiber layer 21 and the second fiber layer 22 are thermally dissolved 114264.doc -18 - 1379668, or both are thermally welded, and then the second heat treatment is performed. The fiber layer 22. The plurality of bosses 24 are formed by thermally shrinking the second fiber layer 22 in the horizontal direction, and deforming the portion other than the heat-welded portion 23 of the first fiber layer 21 into a convex shape. The heat seal portion 23 is regularly formed in a scatter shape and a zigzag shape. The distance between the heat seal portions 23 Each of the bosses 24 is formed in a dome shape, and the inside thereof is filled with fibers constituting the first fiber layer 21. Further, the first fiber layer 21 and the second fiber layer in which portions of the boss portions 24 are formed are formed. The interface of 22 is not joined, but is in a state of close contact. It is preferable that the constituent fibers of the first fibrous layer 21 are substantially not heat-shrinkable, or the heat of the constituent fibers of the second fibrous layer 22. The heat shrinkage is not performed below the shrinkage temperature. The constituent fiber of the second fiber layer 22 is preferably a thermoplastic polymer material and has heat shrinkability. Further, the constituent fiber preferably exhibits shrinkage after shrinkage. As an example of such a fiber, the elastomer behavior β can be cited as a latent crimping fiber. The proportion of the latent crimpable fibers 3 in the second fibrous layer 22 is preferably 4 〇 1 to 1% by weight. The latent crimped fiber has fibers having the same properties as before the heating, and can be operated in the same manner as the conventional nonwoven fabric, and has a shrinkage by heating at a specific temperature to exhibit a spiral crimp. Both heat shrinkability and elastomeric behavior can be achieved by using potentially crimpable fibers. The latent crimpable fiber system includes, for example, an eccentric core-sheath type or a side-by-side type composite fiber comprising two kinds of thermoplastic poly-α material materials having different shrinkage ratios. For example, it is exemplified by JP264 296325A4JP2759D1B 114264.doc •19·1379668. The second fiber layer 22 may, for example, contain such a latent crimping fiber in advance, and may shrink while being thermally fused with the first fiber layer 21 or thereafter, by shrinking the fiber by heating. The water-repellent side sheets 6 are joined to both sides in the longitudinal direction of the top sheet 2 in the manner shown in Figs. 1A and 12, respectively. The side sheets 6 are joined to the skin contacting surface side of the top sheet 2, and are joined so as to extend from both edges in the longitudinal direction of the top sheet 2 to the outside in the width direction.

In the longitudinal direction, the side sheet 6 preferably penetrates 25% or more of the length of the absorbent body 4 (longitudinal direction), more preferably 6% by weight or more of the length of the absorbent body 4, and preferably the absorbent body 4 More than 100% of the length. Further, the side sheet 6 is preferably provided in a discharge area (a portion where the side flap portion 72 (described later in detail) is formed, or a portion that protrudes outward in the width direction of each of the grooves 8a, 8b, 8c). It is preferable that the bean is placed in the region where the leakage preventing wall 5 (described later) is completely raised (the excretion portion facing portion A). It is best to set it in the area where the leak-proof wall is flat (excretion

The opposite part of the material and the rear part. The width of the side sheets 6 is preferably 15 to 6 mm, more preferably 20 to 4 mm. As shown in Fig. 1A, the side sheet 6 is disposed in a longitudinal section in the width direction, at least from the contact surface side of the == to the side surface 43. In the present embodiment, the sheet 6 is covered from the vicinity of the side edge of the skin contact surface of the absorbent body 4 to the side surface 43 of the absorbent body 4, and is wound on the side of the skin contact surface (the side of the back sheet 3) which is not pulled by the body. The second thin = water-repellent sheet is not particularly limited, but it is preferred to use a cloth =: a so-called spunbond non-woven fabric, which means a non-woven fabric containing a spunbond: a layer having a cloth, for example, a spinning-non-woven fabric, There is a non-woven fabric in which a layer of silk is composed of only spunbonded <non-woven fabric, which will be spunbonded 114264.doc •20. It is preferable that the sheet 6 is formed by combining the spunbond and the dazzle spray to form the right layer of the layer as a combination of the spunbond (s) and the solvent spray (f) to form a layer: for example, SMS, SM, and s, and SSMMS are not woven, although SMS is not woven, it is thinner, has better softness than (4), has sufficient water repellency and strength, and the strength balance of vertical and horizontal is also good. As a constituent fiber of the spunbonded nonwoven fabric, for example, a polyolefin fiber such as a resin containing polyethylene, a polypropylene or a propylene-acetonitrile random copolymer as a main component, or a polystyrene diacetate Ester fibers or polyamide fibers, and preferred among these are polyolefin fibers. As the fiber structure, it may be a single fiber, a core-sheath fiber, and a composite fiber called a side-by-side fiber. A fiber comprising a propylene-ethylene random copolymer, a core sheath fiber having a polyethylene as the core and a sheath of polyethylene, a core of polypropylene and a core sheath fiber of polyethylene In particular, it is better to improve the feel and feel. The width of the boundary region s (see Fig. J 〇 and Fig. 12) where the top sheet 2 and the side sheet 6 overlap is preferably 2 to 25 mm, more preferably 5 to 15 mm. The skin contact surface side of the top sheet 2 including the uneven sheet and the non-skin contact surface side of the side sheet 6 are as shown in Fig. 13 and are preferably joined in a scatter manner in the convex portion 24 of the uneven sheet. In the structure joined in this manner, in the boundary region S, a gap can be formed between the adjacent convex portions 24. Therefore, the body fluid which is conducted on the skin contact surface side of the top sheet 2 in the width direction flows into the boundary region s through the gap between the adjacent convex portions 24, and is temporarily stored in jl4264.doc -21 - 1379668. In this way, the liquid in the boundary zone temporarily stores the liquid. It is preferable that the τ formation is temporarily maintained, and the top is larger than the side sheet. Since the thickness and the stretchability are thicker and the stretchability is more ’, the boundary region is 娀ς and the #3 side is curved. Specifically, the top sheet 2 and the side sheet = the back sheet sheet are carried in when the absorbent article is produced: the sheet side of the stretched side sheet is stably carried out, and when it is difficult to stretch, The thickness of the absorbent body 4 (especially the tensile force of the core which is applied to the top core: the thickness of the structural portion when the tensile force is overlapped with the absorbent body 4) causes distortion, and as a result, the boundary region S is easily bent. The ease of bending of the boundary region S can be evaluated by measuring the properties as follows. The top of the side sheet 6 will be joined to the town y 1 < P 2 2 to make the length of menstrual napkin

The direction in which the direction becomes the length direction is cut into the length ι 〇〇 钧 钧 mm (1 degree of the side sheet 6 except the boundary area is 2 〇 之 shape, and a test piece is prepared. Further, the test bench is preferably Cubes with a length of 12 〇mm or more, a width of 60 mm or more, and a height of 40 mm or more, and without corner treatment (dehorning treatment). When using a de-angled test rig, the radius of curvature of the corner is more suitable. Within 1 mm. On the test bench, 'load the top sheet 2 of the test piece and the portion of the boundary area s. The side sheet 6 (the portion other than the boundary area s) extends from the upper end of the test stand and becomes free. At the same time, the side of the test stand is made to coincide with the boundary line between the boundary portion S of the test piece and the side sheet 6. Thereafter, the top sheet 2 of the test piece and the boundary portion s are partially extended by 50/〇 (to become 1 〇 5 mm). , 114264.doc •22· 1379668 Fix the two ends of the part with a tape of 24 mm width (manufactured by NIChiBAn Co., Ltd., trade name CELLOTAPE (registered trademark) CT-24. Here, the side of the test bench, and test Boundary portion S and side sheet 6 The boundary line is consistent, taking care not to separate the tape from the side of the test bench. Also, on the de-angled test bench, the boundary portion S of the de-angled position must be not fixed to the test bench. The test piece of the test piece is bent (folded) along the side of the test stand, and is measured from the end portion in the width direction of the bent test piece to the front portion, the rear portion, and the center portion along the longitudinal direction of the test piece. The distance from the side of the test bench is referred to as the "bendability" by the average value. The ease of bending is evaluated based on the value of the "bendability". The top sheet 2 (the sheet having the boundary region S) to which the side sheets 6 are joined is bonded. The bending property is preferably 〇~1〇mm, more preferably 〇~7 mm, and further preferably 〇~5 mm. If only the top sheet 2 is subjected to the same measurement, and the bending property of the top sheet 2 is measured, It is difficult to bend only when the top sheet 2 is used. The sheet having the boundary region 8 preferably has a bendability of 6% or less, more preferably 40% or less, of the top sheet 2 (only). And the stretchability of the side sheet 6 The TENSILON tensile tester (model: RTA-1〇〇, manufactured by 〇RIENTEC AG) was cut into 15 mm in the longitudinal direction of the absorbent article in the width direction of the absorbent article. The test piece cut up to 2 mm was fixed on a chuck with a spacing of 100 mm. 'Measure the elongation at a speed of 3 mm/min to the elongation (mm) when subjected to a load of 1 N. Here, the so-called The elongation indicates the length of the portion elongated from the original length (150 mm). Preferably, the top thin 114264.doc -23- 1379668 sheet 2 has higher stretchability than the side sheet 6 and has a better elongation. It is more than 2 times, and more preferably more than 4 times. The back sheet 3 covers the entire area on the non-skin contact surface side of the absorbent body 4 (including the side sheet 6 that is wound up), and both edges in the longitudinal direction of the absorbent body 4 extend outward in the width direction to form the side flaps 71. The side flaps 71 extend further outward in the width direction at the position of the opposing portion A of the excretion portion of the menstrual napkin i to form a pair of side flap portions 72. The side flap portion 72 is bent at the time of wearing and is fixed to the outer surface of the underwear such as a pair of shorts by an adhesive or the like. The top sheet 2 and the back sheet 3 are respectively extended from the longitudinal direction of the absorbent body 4, and are joined to each other in the extending portion to form the end seal portion 73. A pair of leakage preventing walls 5, 5 are disposed outside the width direction of the absorber 4, respectively. The leakage preventing wall 5 is disposed to be disposed between the front end portion B of the menstrual sanitary napkin 1 and the rear end portion C'. The leakage preventing wall 5 includes a base wall portion 51 rising from the side of the side surface 43 of the absorbent body 4, and is connected thereto. The planar elastic expansion portion 52 of the upper end portion 54. The elastically stretchable portion 52 is provided with elastic members 5d and 5e along the longitudinal direction of the menstrual napkin 1, thereby imparting elastic stretchability. The leakage preventing wall 5 is provided along the side surface of the absorbent body 4, and the upper surface (skin contact surface side) of the elastically stretchable portion 52 is substantially parallel to the upper surface of the absorbent body 4 (the skin contact surface side). The elastically stretchable portion 52 contacts the skin of the wearer in a planar manner at least in the opposing portion A of the excretory portion. The elastically stretchable portion 52 is connected to the upper end portion 54 of the base wall portion 51 in a T-shaped cross section. In other words, the elastically stretchable portion 52 is formed from the upper end portion of the base wall portion 51 to the inner projecting portion 52A which is internally stretched in the width direction of the menstrual napkin 1 and the upper end portion 5 4 from the base wall portion 5 1 to the menstrual napkin. The outer portion of the outer stretching direction of the width direction of the outer surface 114264.doc • 24-projection portion 52B. The extension widths of the two projecting portions 52Α, 52Β are different, and the projecting width of the inner projecting portion 52Α and the outer projecting portion 52Β The ratio of the projecting width (the former: the latter) is preferably 3: 2 to 5: 1. The inner projecting portion 52A and the outer projecting portion are arranged with four filament-like interiors at intervals in the width direction. The elastic member 5d and the two filament-shaped outer elastic members 5e (only the roots are respectively shown in Fig. 1). The elastic members 9 are disposed at least in the opposing portion A and the rear portion C of the excretion portion of the menstrual sanitary napkin. The drain wall 5 rises in the opposing portion a and the rear portion c of the drain portion, and at least the inner side in the width direction of the elastically stretchable portion 52 (the inner projecting portion 52A) is fixed to the top portion in the front end portion B' and the rear end portion Ci The sheet 2 is blocked from standing up (not standing up). The elastic stretchable portion 52 is on the skin of the top sheet 2 The contact surface side is joined by the front sheet portion 74 on the front side in the longitudinal direction and joined by the rear sheet portion 75 on the rear side in the longitudinal direction. Therefore, by the contraction of the elastically stretchable portion 52, the menstrual napkin 1 is in the longitudinal direction thereof. The entire shape is curved in a concave shape as shown in Fig. 8. The leakage preventing wall 5 of the present embodiment is used to fix the leakage preventing wall forming sheet 53 to other structural members of the menstrual sanitary napkin 1 (back sheet 3, side sheet 6, etc.) The leakage preventing wall forming sheet 53 is formed by a sheet having a specific width in the longitudinal direction, and is formed in a cross-sectional τ shape by forming the upper end portion 54 of the base portion 5 1 and the elastically stretchable portion 52. In the meantime, the leakage preventing wall forming sheet 53 is formed in two layers in the base wall portion 51 and the elastically stretchable portion 52. Further, the width of the leakage preventing wall forming sheet 53 means a single state. The width of the leakage preventing wall forming sheet 53 does not necessarily coincide with the width direction of the absorbent article. 0 114264.doc 25· 1379668 More specifically, in the opposing portion A of the excretory portion, as shown in Fig. 1(a) Lower end portion 55 of the wall portion 51 (on the side of the elastically stretchable portion 52) The end portion on the opposite side of the upper end portion 54 is wound around the non-skin contact surface side of the absorbent body 4. Further, the wound lower end portion 5 is fixed to the side sheet to be wound by a well-known joining method such as an adhesive or the like. Between the non-skin contact surface side of 6 and the skin contact surface side of the back sheet 3. The fixed position of the leakage preventing wall forming sheet 53 in the width direction of the drain portion opposing portion A is near the lower end portion 55 of the base wall portion 51. In the rear portion c, as shown in Fig. 10(c), the portion of the leakage preventing wall forming sheet 53 is folded into a mountain shape so as to extend inward in the width direction to form the multilayer portion 58. The folding portion of the multilayer portion 58 The facing surface is joined by the opposing surface joint portion 57 to maintain the folded configuration. In view of the fact that the base wall portion 51 of the leakage preventing wall $ is well raised, the opposing surface joint portion 57 is preferably provided at a position outside the folding opposing surface of the multilayer portion 58 in the width direction. By providing the multi-layer portion 58, the thickness direction of the rear portion C from the upper end portion 54 of the base wall portion 51 to the back sheet 3 is shorter than the thickness direction of the opposing portion A of the excretory portion. The multilayer portion 58 is formed to span a specific length in the longitudinal direction of the base wall portion 51. Preferably, the length of the multilayer portion 58 is 15 to 45%, more preferably 2 to 30%, of the total length of the portion of the leakage preventing wall 5 rising. Since the menstrual sanitary napkin of the present embodiment has the above configuration, at least the excretory portion opposing portion A has a double leakage preventing structure formed by the side sheet 6 and the leakage preventing wall 5. The elastically stretchable portion 52 of the leakage preventing wall 5 can be stretched and stretched by a stretchable film or a non-woven fabric, a stretchable film and a non-woven fabric without using the elastic member 9, and the non-stretchable film can be stretched and formed by the uneven processing. Composition of materials, etc. Further, the base wall portion 51 may have stretchability similar to the elastically stretchable portion 52, 114264.doc • 26-1379668. Further, although the base wall portion 5 of the leakage preventing wall 5 of the present embodiment is integrally formed with the elastically stretchable portion 52, the base wall portion 51 and the elastically stretchable portion 52 may be separately manufactured and joined together. According to the menstrual sanitary napkin 2 of the present embodiment, the water-repellent side sheet 6 is joined to both sides in the longitudinal direction of the top sheet 2, and the side sheet 6 is longitudinally oriented in the width direction, at least from the skin contacting side of the absorbent body 4. The double side leakage preventing structure is formed by the side sheets 6 and the leakage preventing walls 5 in the opposing portion of the excretion portion that is disposed opposite to the liquid discharge portion of the wearer at least when worn over the side surface 43. Therefore, it is possible to prevent the body fluid from leaking from the side of the absorber 4 by the side sheets 6. Further, for the body fluid passing over the side sheets 6, the leakage preventing wall 5 can be prevented from leaking. In this manner, according to the menstrual sanitary napkin of the present embodiment, the side leakage preventing performance is greatly improved by the double leakproof structure. The side sheet 6 is joined to the skin contact surface side of the top sheet 2 including the uneven sheet, and the boundary portion 8 where the top sheet 2 and the side sheet 6 overlap is formed with a liquid temporary storage space for temporarily storing the liquid. Therefore, the body fluid that has moved in the width direction on the skin contact surface side of the top sheet 2 is temporarily stored in the liquid temporary storage space, so that the leakage of the body fluid from the absorber 4 is further enhanced. In the case where the above-mentioned uneven sheet is used as the top sheet 2, if the top sheet 2 is wound on the non-skin contact surface side of the absorbent body 4 without using the side sheet 6, the uneven sheet is thicker. It is difficult to bend, and has high resilience due to its flexibility. Therefore, when the menstrual napkin 1 is manufactured, the handling of the top sheet 2 and the curling of the top sheet 2 are difficult. On the other hand, in the present embodiment, the water-repellent side sheet 6' having a thinner thickness and a smaller stretchability than the top sheet 2 of the front sheet 2 is used in the longitudinal direction of the top sheet 2. Handling and curling are easier to manufacture. Further, since the side sheets 6 can be curled into a beautiful shape, they are not enlarged, and the body fluid does not accumulate, which makes it difficult to cause leakage. The menstrual sanitary napkin of the embodiment shown in Fig. 14 is not wound into the non-skin contact surface side of the absorbent body 4 as compared with the embodiment shown in Figs. 8 to 1B. Specifically, the width direction portion of the side sheet 6 on the skin contact surface side is the same as the position of the side sheet 6 of the first embodiment, but the width direction end portion of the side sheet 6 on the non-skin contact surface side does not reach the absorber 4 The side 43 is under ^. The other structure is the same as that of the embodiment shown in Figs. 8 to 10 . The menstrual sanitary napkin of the embodiment shown in Fig. 14 has a non-skin which is not wound into the absorbent body 4 at the lower end portion 55 of the base wall portion 5 1 of the leakage preventing wall 5 as compared with the embodiment shown in Fig. 15 The contact surface side is bent outward in the width direction. Other structures are as shown in the embodiment shown in Fig. 14. The menstrual sanitary napkin 1 of the embodiment shown in Fig. 16 is joined to the non-skin contact surface side of the top sheet 2 in comparison with the first embodiment. The other structure 10 is the same as the embodiment shown in Figs. 8 to 10. The menstrual sanitary napkin of the embodiment shown in FIG. 17 has a substantially T-shaped shape in the longitudinal direction of the leakage preventing wall 5 as compared with the embodiment shown in FIG. 8 to FIG. In other words, the leakage preventing wall 5 rises from the back sheet 3 and is inverted toward the inside in the width direction so as to be positioned above the skin contacting surface side of the absorbent body 4. Further, the leakage preventing wall 5 has a configuration in which the outer side of the skin contact surface side of the absorbent body 4 is folded outward in the width direction, and the outer side of the skin contacting surface of the absorbent body 4 is inclined outward in the width direction. The other structure is the same as that of the embodiment shown in Figs. 8 to 10, for example, 114264.doc • 28 · 1379668. In the menstrual sanitary napkin 1 of the embodiment shown in Fig. 18, compared with the embodiment shown in Fig. 17, the front end portion of the leakage preventing wall 5 has a shape in which it is internally folded in the width direction to be absorbed. The upper side of the skin contacting surface of the body 4 is reversed to the inside in the width direction. The other structure is the same as that shown in Fig. 17. The menstrual sanitary napkin of the embodiment shown in Fig. 19 is formed by folding a sheet of water-repellent sheet into a predetermined shape as compared with the embodiment shown in Fig. 15. That is, the side sheets 6 and the leakage preventing walls 5 are integrally formed. The other structure is the same as that of the embodiment shown in FIG. The present invention has been described above based on preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. For example, in the embodiment shown in FIG. 7 to FIG. 7, the skin contact surface of the leakage preventing wall 5 is slightly extended in the horizontal direction, and is the same in the width direction inside and outside, but may be replaced in the width direction. . The amount of elongation from the outside is different. Further, in the above embodiment, the front end and the rear end of each of the leakage preventing grooves 8 are connected to each other. Alternatively, the front end or the rear end may be not connected to #, or both the front and rear ends may not be connected. Further, the absorbent body 4 of the embodiment shown in Figs. 8 to 19 is not limited to the form in which the two layers of the medium-high structure are not bonded to the two layers, and the form of use can be employed by means of an adhesive or pressure. The flower means is an absorbent body in which a flat absorbent body having a medium-high structure or a multi-layer structure (medium-high structure) is integrated. As shown in FIG. 8 to FIG. 19, the internal extension portion 52A and the external extension are in the case of using a section T-shaped anti-114264.doc -29·1379668 leakage wall. The respective projection widths of the outlet portions 52B may be the same, and the extension width of the outer projection portion 52B may be greater than the inner projection portion 52A. In the embodiment shown in Fig. 8 to Fig. 19, the multilayered portion 58 of the leakage preventing wall 5 may be formed by folding a portion of the leakage preventing wall forming sheet 53 into a mountain shape so as to extend outward in the width direction. The number of times of folding of the multilayer portion 58 and the width of the multilayer portion 58 can be appropriately set such as the position of the opposing surface joint portion 57 of the folded opposing surface of the multilayer portion 58. Each configuration of each embodiment can be suitably used in other embodiments. The invention can be applied to an incontinence pad, a panty pad, a disposable diaper, etc., in addition to menstrual sanitary napkins. [Industrial Applicability] According to the absorbent article of the present invention, the portion of the leakage preventing groove that faces the excretion portion of the wearer is curved outward in the width direction of the absorbent article, thereby preventing the leakage. The groove is the starting point of the bend, making the absorbent article easy to face toward the body side. As a result, the leakage preventing wall is easily spread out to the outside, and the absorption surface is hard to be covered by the leakage preventing wall. Therefore, the absorption surface can be effectively used to improve the leakage prevention effect. Further, since the leakage preventing groove is the starting point of the bending, the absorbent article is easily pushed up toward the body side, so that the absorbent body located between the leakage preventing grooves becomes easy to be stably swelled, and the absorbing absorbent body is closely attached to the wearable body. The skin of the person further raised the leak-proof effect. In particular, in the absorbent article having the leakage preventing wall, the side leakage prevention property can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view showing a sanitary napkin of 114264.doc • 30-1379668 as an embodiment of the absorbent article of the present invention. Figure 2 is a cross-sectional view taken along line n_n of Figure 1. Figure 3 is tied to the figure! A cross-sectional view in the width direction of the opposite portion of the drain portion in the state of the sanitary napkin shown. Figure 4 is a plan view showing a conventional menstrual napkin. Fig. 5 (a) and Fig. 5 (b) are cross-sectional views in the width direction of the opposing portion of the excretory portion in a state in which the sanitary napkin shown in Fig. 4 is worn. Fig. 6 is a schematic view showing the central curved groove in the leakage preventing groove enlarged. Fig. 7 (a) and Fig. 7 (b) are cross-sectional views taken along line ππ of another embodiment of the present invention. Fig. 8 is a perspective view showing a schematic form of a menstrual sanitary napkin according to another embodiment of the present invention in a natural state. Fig. 9 is a plan view showing a state in which the menstrual sanitary napkin of the embodiment shown in Fig. 8 is stretched. Figure 10 (a) is a cross-sectional view of Illa-IIIa as shown in Figure 9, Figure i (b) is a partial enlarged view of Figure 1 (a) - Figure 10 (c) is a IIIc_nic profile as shown in Figure 9. Figure. Fig. 11 (a) is a longitudinal sectional perspective view of the top sheet of the menstrual napkin of the embodiment shown in Fig. 8, and Fig. 11 (b) is a cross-sectional view taken along line B-B of Fig. 11 (a). Fig. 12 is a plan view showing the unfolding of the joint form of the top sheet and the side sheet. Fig. 13 is a perspective view showing a liquid temporary storage space of the menstrual sanitary napkin of the embodiment shown in Fig. 8. Fig. 14 is a longitudinal cross-sectional view showing the menstrual sanitary napkin according to another embodiment of the present invention in the width direction [corresponding to Fig. 10(a)]. 114264.doc -31 - 1379668 Fig. 15 is a longitudinal sectional view showing the menstrual sanitary napkin according to another embodiment of the present invention in the width direction [corresponding to Fig. 1(a)]. Fig. 16 is a longitudinal sectional view showing the menstrual sanitary napkin according to another embodiment of the present invention in the width direction [Fig. 1 (a) corresponding diagram]. Fig. 17 is a longitudinal sectional view showing the menstrual sanitary napkin according to another embodiment of the present invention in the width direction [Fig. 1 (a) corresponding to Fig. 1]. Fig. 18 is a longitudinal sectional view showing the menstrual sanitary napkin according to another embodiment of the present invention in the width direction [Fig. 1 corresponding to Fig. 1(a)).

Fig. 19 is a longitudinal sectional view showing the menstrual sanitary napkin according to another embodiment of the present invention in the width direction [Fig. 1 (a) corresponding to Fig. 1]. [Main component symbol description]

1 Menstrual sanitary napkins Existing sanitary napkins 2 Top sheet 3 Back sheet 4 Absorber 5 Leakproof wall 5a Base wall portion 5b Skin contact surface 5b' Skin contact of existing sanitary cotton base wall 5c Elastic member 6 Side sheet 7 End seal Part 8 leak-proof groove face 114264.doc -32- 1379668

8' Leakage prevention groove 8a of the existing sanitary napkin, central curved groove 8b, front groove 8c, rear groove 9, elastic member 9a' 9b, constricted portion 21, first fiber layer 22, second fiber layer 23, heat-welded portion 24, convex portion 41, upper layer, absorbent body 42 Lower layer absorber 43 side surface 51 base wall portion 52 elastic stretch portion 52A inner projecting portion 52B outer projecting portion 53 leak preventing wall forming sheet 54 base portion 5 1 upper end portion 55 base portion 5 1 lower end portion 57 pair Face-to-face joint portion 58 Multi-layer portion 71 Side flap portion 72 Side flap portion 114264.doc -33 - 1379668 74 Front sheet portion 75 Rear sheet portion A Pool portion opposite portion A' Exhaust portion of sanitary napkin opposite portion B Front portion B' The front end portion C of the existing sanitary napkin C' the rear end portion of the existing sanitary napkin S The boundary region where the top sheet 2 and the side sheet 6 overlap

114264.doc -34-

Claims (1)

1379668 Patent application scope: Patent application No. 059132028 Chinese application, replacement of the scope of interest (101 years L month) A kind of absorption of private j. In the middle of the month, the absorbent article has a surface layer and ^^__ /, and the left and right sides of the surface layer side are respectively located in the longitudinal direction and are located outside each of the leak prevention grooves and respectively a leakage preventing wall extending in a longitudinal direction; the leakage preventing wall includes a base wall portion and a skin contact surface extending from the upper end of the base wall portion in a horizontal direction, and the skin contact surface is slanted along the stretched state along the leakage prevention An elastic member extending in the longitudinal direction of the wall; each of the leakage preventing grooves is formed by compacting and integrating the surface layer and the absorbent layer, and the portion facing the wearer's excretion portion is curved toward the outside in the width direction of the absorbent article. It is convex. 2. An absorbent article according to the present invention, wherein each of the leak preventing grooves connects the front and rear ends to each other to form a closed shape. The absorbent article according to claim 1, wherein the base of the absorbent body between the respective leak preventing grooves is larger than the basis weight of the absorbent body located outside the leak preventing groove. 4. The absorbent article of claim 3, wherein the shape of the above-mentioned leak-preventing groove forming a closed shape coincides with the plan view of the high-weight absorbent body located in the leak-proof groove. 5. The absorbent article of claim 3, wherein the high basis weight absorbent body located in said leakproof groove has a basis weight of from 3 Torr to 1500 g/m2. 6. The absorbent article according to claim 1, wherein each of the leak preventing grooves has a constricted portion at a position before and after the portion of the absorbent article which is curved outward in the width direction of the absorbent article. The absorbent article of claim 1, wherein the length of the top sheet is 114264-1010725.doc / 刈68 pm, respectively, in the longitudinal section of the water, at least from the skin contacting side of the absorbent body across the side Disposed; at least in a portion opposite to the excretion portion of the wearer, the double side leakage preventing structure is formed by the side sheet and the leakage preventing wall. 8. The absorbent article of claim 7, wherein said side sheet is joined to the skin contacting side of said top sheet. 9. The absorbent article according to claim 7, wherein the side sheet is joined to the top sheet so as to extend outward in the width direction from both side edges in the longitudinal direction of the top sheet. 10. The absorbent article according to claim 7, wherein the top sheet of the top sheet comprises a concave-convex sheet having a plurality of convex portions protruding from the side of the skin contact surface. 11. The absorbent article of claim H) wherein the side sheet is joined to the skin contact surface side of the uneven sheet, and a liquid temporarily storing the liquid is temporarily formed at a boundary region where the uneven sheet overlaps the side sheet Save space. 12. The absorbent article of claim 8, wherein the top sheet of the top sheet has a larger stretchability than the side sheet, and the boundary between the top sheet and the side sheet f is increased by the difference in stretchability. It becomes easy to bend toward the side of the back sheet. 13. The absorbent article according to claim 8, wherein the side sheet is formed of a spunbond nonwoven. 114264-1010725.doc