JP2020044047A - Absorbent articles - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article having excellent fit to a crotch portion of a wearer and prevention of liquid leakage. SOLUTION: An upright portion 51 of a leak-proof cuff 5 is configured to include an inward extending portion 52 extending inward in the lateral direction Y from a base end portion 50 and having elasticity in the vertical direction X. An standing inhibition portion 55 in which the medial extending portion 52 is fixed to the surface sheet 2 is formed in each of the front portion F and the rear portion R. At the time of wearing, the standing portion 51 sandwiched between the standing blocking portions 55 and 55 at both ends of the vertical direction X in the leak-proof cuff 5 wears the free end with the edge portion 52a of the inner extending portion 52 as a free end. The free end is located inward in the lateral direction Y with respect to the base end portion 50 in the standing state of standing toward the skin side of the person. The absorber 4 has a rear slit region RS in the rear portion R, and the standing inhibition portion 55 of the rear portion R is located vertically rearward of the longitudinal rear end of the region RS. [Selection diagram] Fig. 1

Description

  The present invention relates to an absorbent article provided with a leak-proof cuff that stands up toward the skin side of a wearer.

  Since absorbent articles such as sanitary napkins are worn while being in contact with the wearer's crotch, they are deformed along the wearer's body shape so as not to cause discomfort or discomfort to the wearer. In addition, it is desired to adhere to the wearer's skin with good fit. Further, among the absorbent articles, there are nighttime absorbent articles designed to have a relatively long vertical length along the front-rear direction of the wearer. Such an absorbent article for night use usually has a flap portion at a rear portion disposed closer to the back of the wearer in order to prevent leakage of excrement such as menstrual blood.

  Patent Literature 1 describes a sanitary napkin for night use provided with a side leakage prevention member also called a leak-proof cuff, three-dimensional gather, or the like. In the sanitary napkin described in Patent Literature 1, a pair of leak-proof cuffs are arranged on both sides along the longitudinal direction of the absorbent main body, and a side sheet extending over the entire length of the absorbent main body; An elastic member fixed in an extended state to the lateral inner edge. Further, the lateral inner edges of the longitudinal front and rear end portions of the side sheet are fixed to the top sheet to form a fixing portion.When the napkin is worn, the portion of the side sheet sandwiched between the fixing portions is Due to the contraction of the elastic member, the lateral inner edge is set as a free end, and the free end stands up toward the skin side of the wearer. Note that the vertical direction is a direction corresponding to the front-back direction of the wearer, and the horizontal direction is a direction orthogonal to the vertical direction. Patent Literature 2 also discloses a sanitary napkin including a leak-proof cuff having the same configuration as described above.

  In addition, for the purpose of making the absorbent article adhere to the skin of the wearer with good fit, for example, a technique of forming a slit or an opening in a particularly rigid absorber among constituent members of the absorbent article is known. . For example, Patent Literature 3 discloses that in a sanitary napkin having a flap portion at a rear portion, a portion of the absorbent body located at the rear portion and a portion located at an excretory portion facing portion located longitudinally forward of the rear portion. It discloses that a slit region in which a plurality of slits extending in the vertical direction are arranged is provided.

JP 2013-85829 A JP-A-2006-67957 JP 2018-50951 A

  As a specific problem when using the sanitary napkin at bedtime, at the time of bedtime of the wearer, body fluids such as menstrual blood travel along the wearer's body to the rear portion of the napkin, and from both sides of the rear portion to the outside. There is a problem of leakage. In order to solve this problem, it is effective to 1) closely fit the entire napkin to the crotch of the wearer to improve the fit, and 2) install a leak-proof cuff from the front to the rear of the napkin. It is.

  However, since the nighttime sanitary napkin has a long vertical length corresponding to the front-rear direction of the wearer, the entire napkin adheres to the crotch of the wearer having a complicated surface shape with good followability and fit. Is technically higher than a daytime sanitary napkin whose length in the longitudinal direction is relatively short, and the technology corresponding to the above 1) has not been provided yet. Further, regarding the above 2), even if the leak-proof cuff is installed on the sanitary napkin for nighttime based on the conventional technology, the leak-proof cuff does not stand sufficiently particularly in the rear part, and the fitting property to the buttocks of the wearer is improved. There was room for improvement in terms of liquid leakage prevention.

  An object of the present invention is to provide an absorbent article that is excellent in fitting property to a crotch part of a wearer and in preventing liquid leakage.

  The present invention has a longitudinal direction corresponding to the front-rear direction of the wearer and a transverse direction perpendicular thereto, and an intermediate part including a discharge part facing part facing the excretion part of the wearer when worn, and a vertical part from the intermediate part. A front portion extending forward in the direction, a rear portion extending longitudinally rearward from the intermediate portion, and an absorbent body, and a pair disposed on both sides along the longitudinal direction of the absorbent body. Wherein the absorbent body includes a water-absorbing material, a surface sheet disposed on the skin-facing surface side of the absorbent body, and a non-skin-facing surface on the absorbent body. An absorbent article comprising a backsheet arranged and a pair of the leakproof cuffs each including a leakproof cuff sheet, and the leakproof cuff sheet is fixed to another member. A base end portion, and an upright portion in which the leak-proof cuff sheet stands up to the wearer. , Extending inward in the horizontal direction from the base end portion, and is configured to include an inward extending portion having elasticity in the longitudinal direction, and the inward extending portion is provided on each of the front portion and the rear portion. Is formed, and at the time of wearing, the upright portion sandwiched between the upright inhibiting portions at both ends in the longitudinal direction of the leak-proof cuff is free of an edge of the inner extension. As an end, the free end is erected toward the wearer's skin side, and in the erected state, the free end is located more laterally inward than the base end, and the absorber is provided at the rear portion, A rear slit region provided with a rear slit extending in a vertical direction is provided, and the upright obstructing portion of the rear portion is an absorbent article positioned rearward in a vertical direction from a vertical rear end of the rear slit region.

  ADVANTAGE OF THE INVENTION According to this invention, the absorptive article excellent in the fitting property with respect to a crotch part of a wearer and the liquid leak-proof property is provided.

FIG. 1 is a plan view schematically showing a skin-facing surface side (top sheet side) of a sanitary napkin as one embodiment of the absorbent article of the present invention. FIG. 2 is a plan view schematically showing a non-skin facing surface side (back sheet side) of the sanitary napkin shown in FIG. FIG. 3 is a cross-sectional view schematically showing a cross section taken along line II of FIG. FIG. 4 is a cross-sectional view schematically showing a cross section taken along line II-II of FIG. FIG. 5 is a cross-sectional view schematically showing a cross section taken along line III-III of FIG. 1. FIG. 6 is a plan view schematically showing the side of the absorbent body in the sanitary napkin shown in FIG. 1 facing the skin. FIG. 7 is an enlarged plan view schematically showing a skin facing surface side of a rear portion of the sanitary napkin shown in FIG. 1. FIG. 8 is a diagram corresponding to FIG. 7 of another embodiment of the absorbent article of the present invention.

  Hereinafter, the absorbent article according to the present invention will be described based on preferred embodiments with reference to the drawings. 1 to 6 show a sanitary napkin 1 which is an embodiment of the absorbent article according to the present invention. As shown in FIGS. 1 and 2, the napkin 1 corresponds to the front-rear direction of the wearer, and extends vertically from the wearer's abdomen to the back via the crotch portion and a lateral direction Y perpendicular to the longitudinal direction. And an intermediate portion M including an excretion portion facing portion which is a portion facing the excretory portion (vaginal opening or the like) of the wearer when worn, and a front in the longitudinal direction X from the intermediate portion M, that is, a front side of the wearer ( A front portion F disposed on the abdomen side) and a rear portion R disposed rearward in the longitudinal direction X of the discharge intermediate portion M, that is, on the rear side (back side) of the wearer. The excretion portion-facing portion of the intermediate portion M is located at the center of the intermediate portion M in the lateral direction Y.

  The napkin 1 is mainly used as a sanitary napkin suitable for sleeping at night. Since sanitary napkins for night use are worn for a long time, the amount of excreted fluid such as menstrual blood excreted during wearing increases, and a high absorbing power and holding power for absorbing and retaining a large amount of fluid are obtained. Needed. In order to cope with this, it is preferable that the napkin 1 has a certain size, and more specifically, the total length in the longitudinal direction X is preferably 27 cm or more, more preferably 30 cm or more.

  As shown in FIG. 1, the napkin 1 has a first region in the front in the longitudinal direction X and a second region in the rear in the longitudinal direction X with one central folding line CFL formed by folding in the longitudinal direction X as a boundary. The first region includes a middle portion M and a front portion F, and the second region includes a rear portion R. That is, the center folding line CFL forms the boundary between the middle portion M and the rear portion R. The center folding line CFL is formed by folding the napkin 1 in the vertical direction X with the top sheet 2 forming the skin-facing surface inside (the back sheet 3 forming the non-skin-facing surface outside). , Extending in the horizontal direction Y. The center fold line CFL may be formed at the center of the napkin 1 in the vertical direction X. Specifically, the center fold line CFL is formed with the center of the napkin 1 in the vertical direction X as a reference and the front side in the vertical direction X from the reference. It is a region within 10% of the entire length of the napkin 1 in the vertical direction X on each rear side.

  Also, as shown in FIG. 1, a rear folding line RFL formed by folding the napkin 1 is provided at a rear portion R of the napkin 1 behind a rear slit region RS (RSr, RSl) described later in the vertical direction X. The book is formed. Similarly to the center folding line CFL, the rear folding line RFL is also formed by folding the napkin 1 in the vertical direction X with the top sheet 2 forming the skin-facing surface inside and forming a straight line extending in the horizontal direction Y. No. The rear folding line RFL extends in the horizontal direction Y between the rear slit region RS and the horizontal groove 9 of the rear part R (between the inner groove 13 and the horizontal groove 9). The rear fold line RFL is usually formed at a position separated from the rear end of the napkin 1 in the longitudinal direction X by 10 to 30% of the entire length in the longitudinal direction X from the rear end of the napkin 1 in the longitudinal direction X.

  Further, as shown in FIG. 1, one front folding line FFL formed by folding the napkin 1 is formed in the front portion F of the napkin 1. The front fold line FFL is also formed by folding the napkin 1 in the vertical direction X with the top sheet 2 forming the skin-facing surface inside, similarly to the center fold line CFL and the rear fold line RFL. It extends in a straight line. The front folding line FFL extends in the horizontal direction Y between a central slit region MS described later and a lateral groove 9 of the front part F. The front folding line FFL is usually formed at a position spaced from the front end of the napkin 1 in the vertical direction X to the rear side in the vertical direction X by 10 to 30% of the entire length of the napkin 1 in the vertical direction X.

  As described above, the napkin 1 has a total of three fold lines, that is, the front fold line FFL, the center fold line CFL, and the rear fold line RFL in this order from the front side in the longitudinal direction X. It is used when folded in the vertical direction X and individually wrapped. That is, the individual wrapping form of the napkin 1 is a four-fold form with three fold lines.

  As shown in FIG. 1, the napkin 1 extends outward in the horizontal direction Y from each of the absorbent main body 10 having a shape elongated in the vertical direction X and both sides along the vertical direction X of the intermediate portion M in the absorbent main body 10. It has a pair of wing portions 10W, 10W that project. The absorbent main body 10 extends from the front part F to the rear part R. The longitudinal direction of the absorbent body 10, that is, the longitudinal direction of the napkin 1 coincides with the longitudinal direction X, and the width direction of the absorbent body 10 and the napkin 1 perpendicular to the longitudinal direction coincides with the lateral direction Y.

  The intermediate portion M in the absorbent article of the present invention is a region which is divided by the center fold line CFL and the front end of the wing portion when the absorbent article has a wing portion like the napkin 1. The “wing portion front end portion” is, for example, the base of the one wing portion 10W on the front side in the vertical direction X in the napkin 1. That is, the intermediate portion M has a virtual straight line extending in the horizontal direction Y through the base on the front side of the one wing portion 10W as a front end in the vertical direction X, and a center folding line CFL as a rear end in the vertical direction X. It is a continuous area. In the napkin 1, the pair of wings 10W, 10W are formed symmetrically with respect to a vertical center line CL extending in the vertical direction X by dividing the napkin 1 in the horizontal direction Y. The base of the front side of 10W and that of the other wing portion 10W are at the same position in the vertical direction X.

  In addition, the intermediate portion M in the absorbent article (not shown) having no wing portion is formed when the absorbent article is folded in an individual form, and the absorbent article is placed in the lateral direction (width direction, in the figure). (Y direction), means a region surrounded by the first fold line and the second fold line, counted from the longitudinal front end of the absorbent article. Explaining this with reference to FIG. 1, the front fold line FFL corresponds to the first fold line here, and the center fold line CFL corresponds to the second fold line here. That is, in the napkin 1 shown in FIG. 1, if there is no pair of wings 10W, 10W, the middle part M of the napkin 1 having no wing is formed by connecting the front folding line FFL to the front end in the vertical direction X. And one continuous area having the center folding line CFL as the rear end in the vertical direction X.

  As shown in FIGS. 1 to 5, an absorbent main body 10 constituting the napkin 1 includes a liquid-retentive absorbent body 4 containing a water-absorbing material, and a topsheet 2 disposed on the skin-facing surface side of the absorbent body 4. And a back sheet 3 arranged on the non-skin-facing surface side of the absorber 4. The absorber 4 is interposed between the top sheet 2 and the back sheet 3. A side edge 2S along the longitudinal direction X of the topsheet 2 indicated by reference numeral 2S in the figure is also a side edge along the same direction of the absorbent main body 10, and the absorbent main body 10, the wing portion 10W described above, and a later described. This is also the boundary with each of the rear flap portions 10H (see FIGS. 3 to 5).

  In the present specification, the “skin-facing surface” refers to a surface of the absorbent article or a component thereof (for example, the absorbent body 4) that faces the skin side of the wearer when the absorbent article is worn, that is, the surface of the wearer relatively. The “non-skin-facing surface” is a side close to the skin, and the “non-skin-facing surface” is a surface of the absorbent article or a component thereof which is directed to the side opposite to the skin side (clothing side) when the absorbent article is worn, that is, is relatively worn Far from the skin of the person. In addition, "at the time of wearing" here means the state where the normal appropriate wearing position, ie, the correct wearing position of the said absorbent article was maintained.

  As shown in FIGS. 3 to 5, the topsheet 2 covers the whole area of the skin-facing surface of the absorber 4, and the backsheet 3 covers the whole area of the non-skin-facing surface of the absorber 4. The back sheet 3 extends further outward in the lateral direction Y than the top sheet 2, and forms a side flap portion 10S together with a side sheet 6 described later. The side flap portions 10S are members that extend outward in the lateral direction Y from both side edges 4S, 4S along the longitudinal direction X of the absorber 4 (in the present embodiment, the top sheet 2, the back sheet 3, and the side sheet 6). And includes a wing portion 10W described above and a rear flap portion 10H described later. The back sheet 3 and the side sheet 6 are joined to each other at a portion extending from both side edges along the longitudinal direction X of the absorber 4 by a known joining means such as an adhesive, a heat seal, and an ultrasonic seal. The top sheet 2 and the back sheet 3 are joined to each other at a portion extending from both ends in the longitudinal direction X of the absorber 4 by a known joining means. Each of the top sheet 2 and the back sheet 3 and the absorber 4 may be joined by an adhesive. As the top sheet 2 and the back sheet 3, various kinds of conventionally used absorbent articles such as sanitary napkins can be used without any particular limitation. The surface sheet 2 is preferably a liquid-permeable sheet, and specific examples thereof include a single-layer or multilayer nonwoven fabric and an apertured film manufactured by various known methods. The back sheet 3 is preferably a liquid-impermeable sheet, and specifically includes, for example, a resin film, a laminated sheet of a resin film and a nonwoven fabric, and the resin film may be moisture-permeable. In addition, regarding the back sheet 3, the term liquid impermeability is a concept that includes both the property of not allowing a liquid to pass at all and the property of allowing a small amount of liquid to pass through (liquid poor permeability). The back sheet 3 may have water repellency.

  As shown in FIGS. 1 to 3, a pair of wings 10 </ b> W, 10 </ b> W is extended on both sides along the vertical direction X in the middle part M of the absorbent main body 10. Each of the pair of wing portions 10W, 10W is formed such that the back sheet 3 and the side sheet 6 at portions located at the intermediate portion M of the side flap portion 10S extend outward in the lateral direction Y from the peripheral portion. In a plan view as shown in FIGS. 1 and 2, the lower base (longer side than the upper base) has a substantially trapezoidal shape in which it is located on the absorbent body 10 side. On the non-skin-facing surface of the wing portion 10W, a wing portion fixing member (not shown) for fixing the wing portion 10W to clothing such as shorts is arranged. The wing portion fixing material is formed by applying an adhesive, and is covered with a release sheet made of a film, a nonwoven fabric, paper or the like before use. When the napkin 1 is used, the wing portion 10W is used by being folded back to the non-skin-facing surface, that is, the outer surface side of the crotch portion of clothes such as shorts.

  As shown in FIGS. 1, 2, 4, and 5, a pair of rear flap portions 10 </ b> H, 10 </ b> H is provided on both sides of the rear portion R of the absorbent main body 10 along the vertical direction X. I have. Each of the pair of rear flap portions 10H, 10H is formed such that the back sheet 3 and the side sheet 6 at portions located at the rear portion R of the side flap portion 10S extend outward in the lateral direction Y from the peripheral portion. I have. On the non-skin-facing surface of the rear flap portion 10H, a rear flap portion fixing member 11 for fixing the rear flap portion 10H to clothing such as shorts is arranged. The rear flap portion 10H is not folded back when it is fixed to the garment, and is formed on the non-skin facing surface in a state where the non-skin facing surface is expanded, that is, extended to the side of the absorbent main body 10. The clothing is fixed to the skin-facing surface, that is, the inner surface of the clothes via the rear flap portion fixing material 11 thus formed. The rear flap portion fixing member 11 is formed by applying an adhesive, and is covered with a release sheet (not shown) made of a film, a nonwoven fabric, paper, or the like before use.

  As shown in FIG. 2, on the non-skin-facing surface of the absorbent main body 10, a plurality of main body fixing members 12 for fixing the absorbent main body 10 to clothing such as shorts are intermittently arranged in the vertical direction X. In the present embodiment, the main body fixing members 12 have a rectangular shape in a plan view, and a plurality of the main body fixing members 12 are arranged at predetermined intervals in the vertical direction X, with the longitudinal direction thereof coinciding with the horizontal direction Y. The main body fixing member 12 is formed by applying an adhesive, and is covered with a release sheet (not shown) made of a film, a nonwoven fabric, paper or the like before use.

  As shown in FIG. 1 and FIGS. 3 to 5, a pair of leak-proof cuffs 5 and 5 are arranged on both sides along the longitudinal direction X of the absorbent main body 10. Each of the pair of leak-proof cuffs 5 and 5 includes a leak-proof cuff sheet, and the base end 50 where the leak-proof cuff sheet is fixed to another member, and the leak-proof cuff sheet. Has a standing portion 51 that stands on the wearer side. In the present embodiment, the above-described side sheet 6 is a leak-proof cuff sheet.

  The base end portion 50 is a portion serving as a base end when the standing portion 51 stands up toward the wearer's skin side when the napkin 1 is worn, and more specifically, a leak-proof cuff sheet (this embodiment). In the embodiment, it is a portion adjacent to the upright portion 51 in the lateral direction Y in the fixing portion of the side sheet 6) with the “other member”, in other words, located at the innermost position in the lateral direction Y at the fixing portion. Part. Further, the “other member” is a component other than the leak-proof cuff sheet among the constituent members of the napkin 1, and typically, can be in contact with the non-skin-facing surface side of the leak-proof cuff sheet. , And in the present embodiment, as shown in FIGS. 3 to 5, the top sheet 2.

  The base end portion 50 is, as described above, a fixing portion between the leak-proof cuff sheet and another member, and is typically formed by a known bonding means such as an adhesive such as hot melt or heat fusion. ing. In the present embodiment, as shown in FIG. 1, the base end portion 50 has a linear shape in plan view, and extends vertically over substantially the entire length of the leak-proof cuff sheet (the side sheet 6 in the present embodiment) in the vertical direction X. It extends in the direction X and, as shown in FIGS. 3 to 5, is located near the side edge 2 </ b> S along the longitudinal direction X of the topsheet 2.

  The upright portion 51 is a non-fixed portion with other members in the leak-proof cuff sheet. As shown in FIGS. 3 and 4, the upright portion 51 includes an inner extending portion 52 extending inward in the lateral direction Y from the base end portion 50. It is comprised including. In the present embodiment, the upright portion 51 includes only the inner extension portion 52.

  The inner extension 52 of the upright portion 51 has elasticity in the vertical direction X. In this embodiment, as shown in FIGS. 3 and 4, the side sheet 6 (sheet for forming a leak-proof cuff) constituting the edge region 520 of the inner extension 52 of the upright portion 51 is attached in the vertical direction X. The elastic member 7 having elasticity is provided, and the elasticity in the vertical direction X is imparted to the inner extending portion 52, that is, the upright portion 51 by such a configuration. More specifically, in the present embodiment, the entirety of the leak-proof cuff 5 including the standing-inhibiting portion 55 and the end fixing portion 56, which will be described later, has two side sheets 6 in the lateral direction Y, which are sheets for the leak-proof cuff. The fold of the two folds and the area in the vicinity thereof are the edge area 520. The edge region 520 of the inner extension portion 52 is a portion including the edge portion 52a of the inner extension portion 52 along the longitudinal direction X and a region near the edge portion 52a. It is an area within 15 mm toward the base end 50. The elastic member 7 is fixed in an extended state between the side sheets 6 and 6 forming the two-layer structure in the edge region 520 of the inner extension 52 of the upright portion 51. The region 520 has elasticity in the vertical direction X. The distal end of the folded half-side sheet 6 is joined to the topsheet 2 at the base end 50. The elastic member 7 does not necessarily need to be disposed in the edge region 520 in the inner extension portion 52 of the upright portion 51, but from the viewpoint of improving the uprightness of the inner extension portion 52, etc. 520.

  In the present embodiment, the elastic member 7 has a thread-like shape, and its longitudinal direction is aligned with the longitudinal direction X, so that the elastic member 7 is formed in the side sheet 6 at the portion forming the inner extension 52 (edge region 520) of the upright portion 51. It is fixed in the extended state. The elastic member 7 is preferably in the form of a thread, but may be in the form of a band instead. Further, in the present embodiment, one elastic member 7 is provided for each leak-preventing cuff 5, but the number of the elastic members 7 in each leak-preventing cuff 5 is not particularly limited, and one elastic member 7 is provided. ) Or a plurality (article). Further, on the assumption that the inner extending portion 52 of the upright portion 51 has elasticity in the vertical direction X, an elastic member may not be disposed on the inner extending portion 52. In that case, for example, The portion of the side sheet 6 serving as the leak-proof cuff sheet, which constitutes the inner extending portion 52, may have elasticity in the vertical direction X.

  As described above, in the present embodiment, the elastic member 7 is provided at least in the upright portion 51 (between the upright preventing portions 55 and 55 in the longitudinal direction X of the leak-preventing cuff 5 described later) in the inner extending portion 52. It is fixed in a stretched state to the side sheet 6 which is a leak-proof cuff sheet, so that the upright portion 51 (inwardly extending portion 52) can expand and contract in the vertical direction X. And the leak-proof cuff 5 of the present embodiment is made by fixing the elastic member 7 to the side sheet 6 in the stretched state and then releasing the stretched state. There are many wrinkles on the surface of the leak prevention cuff 5, more specifically, on the surface of the upright portion 51 (inwardly extending portion 52). The wrinkles on the surface of the leak prevention cuff 5 are intermittently arranged substantially regularly in the vertical direction X.

  In this embodiment, as shown in FIG. 1, the side sheet 6, which is a leak-proof cuff sheet, extends along the longitudinal direction X of the absorbent main body 10 over substantially the entire length of the absorbent main body 10 in the longitudinal direction X. The skin-facing surface of the absorbent main body 10, that is, the skin-facing surface of the topsheet 2 is covered with the side sheet 6. As a result, the pair of leak prevention cuffs 5, 5 are respectively continuously arranged in the vertical direction X from the front part F to the rear part R. As the side sheet 6, a liquid impermeable sheet is preferable, and for example, a sheet that can be used as the back sheet 3 can be used.

  As shown in FIG. 1, each of the front portion F and the rear portion R is provided with an upright inhibiting portion 55, which is a portion where the upright portion 51 (inwardly extending portion 52) is inhibited from rising. The upright portion 51 is a portion sandwiched between the upright inhibition portion 55 of the front portion F and the upright inhibition portion 55 of the rear portion R. FIG. 5 shows the standing obstruction portion 55 at the rear portion R. The upright inhibiting portion 55 is formed by fixing the inner extending portion 52 of the upstanding portion 51 to the topsheet 2. It is preferable that at least the portion having elasticity in the vertical direction X is fixed to the topsheet 2 in the upright inhibiting portion 55, and in the present embodiment, the edge portion of the inner extending portion 52. The region 520 is preferably fixed to the topsheet 2. In the present embodiment, the upright inhibiting section 55 (the inner extension 52 of the upright inhibiting section 55) is fixed to the topsheet 2 at a position inward of the base end 50 in the lateral direction Y. The fixing means for fixing the upright inhibiting portion 55 and the topsheet 2, that is, the forming means of the upright inhibiting portion 55 is not particularly limited, and for example, a known fixing means such as an adhesive such as hot melt or heat fusion is used. Can be. Although not shown, the standing obstruction portion 55 of the front portion F is configured similarly to the standing obstruction portion 55 of the rear portion R.

  In this manner, the inner extending portion 52 of the upright portion 51 having elasticity in the vertical direction X is fixed to the topsheet 2 at each of both ends in the vertical direction X, and rises at the front portion F and the rear portion R, respectively. The formation of the blocking portion 55 allows the rising portion 51 of the leak prevention cuff 5, which is a portion sandwiched between the rising blocking portion 55 of the front portion F and the rising blocking portion 55 of the rear portion R, to extend inward. Due to the contraction force of the portion 52 (elastic member 7), as shown in FIGS. 3 and 4, the base end portion 50, which is a fixing portion between the side sheet 6 (leak prevention cuff sheet) and the top sheet 2, is raised. Then, the edge part 52a of the inner extension part 52 can be erected as a free end. The pair of leak-preventing cuffs 5 and 5 stand up while wearing the napkin 1 in this manner, so that lateral leakage of excreted liquid such as menstrual blood excreted on the skin-facing surface of the napkin 1 is effectively prevented. You. Although not shown, in the upright state of the leak-preventing cuff 5, the entire napkin 1 is moved in the longitudinal direction X of the absorbent main body 10 by the contraction force of the inner extending portion 52 (elastic member 7). Since the central portion is curved so as to protrude toward the non-skin facing surface side (the back sheet 3 side) and deforms into a so-called boat shape, it becomes easy to fit the napkin 1 into the wearer's body shape.

  As shown in FIG. 1, a portion of the leak-preventing cuff 5 that is located outside the standing-inhibiting portion 55 in the vertical direction X is fixed to another member by an end fixing portion 56. In the present embodiment, the “other members” are the top sheet 2 and the back sheet 3. In the present embodiment, the end fixing portion 56 has a wavy or zigzag line shape in plan view as shown in FIG. 1, and at least the inner extending portion 52 of the leak prevention cuff 5 and its vicinity, more specifically, The portion of the side sheet 6 (sheet for leak-proof cuff) extending from the base end 50 to the edge 52a of the inner extension 52 is fixed to another member. The end fixing portion 56 is formed by a known fixing means such as an adhesive such as hot melt or heat fusion, and has an adhesive application portion or a heat-sealed portion. As a result, it is harder and more rigid than the peripheral portion (the portion where the end fixing portion 56 is not formed). The shape of the end fixing portion 56 in plan view is not limited to the linear shape as shown in FIG. 1 and can be set arbitrarily. The entirety of the portion which is located on the inner side in the lateral direction Y than the base end 50 may be the end fixing portion 56.

  As shown in FIG. 1, the absorber 4 has a rear slit region RS in which a rear slit R <b> 1 extending in the vertical direction X is arranged in the rear portion R as the second region. In the present embodiment, the absorber 4 serves as a rear slit region RS, and a pair of rear ends disposed on both sides of a vertical center line CL extending in the vertical direction X by bisecting the absorber 4 (napkin 1) in the horizontal direction Y. It has slit regions RSr and RSl. The rear slit R1 is a cut formed in the absorber 4, and at the position where the rear slit R1 is formed, the forming material of the absorber 4 is cut or the forming material is separated from and separated from other portions. . In the napkin 1, the rear slit R1 has a linear shape in plan view, but the planar shape of the rear slit R1 is not limited to this and may be a wavy line or the like. The rear slit R1 only needs to extend in the vertical direction X, and does not have to be parallel to the vertical center line CL as shown in the figure, and has an angle formed with the vertical center line CL (vertical direction X) in plan view. What is necessary is just less than 45 degrees. The angle between the rear slit R1 and the vertical direction X is preferably less than 30 degrees, more preferably less than 10 degrees, and even more preferably 0 degree, that is, the rear slit R1 most preferably extends parallel to the vertical direction X. .

  In each of the pair of rear slit regions RSr and RSl, only one rear slit R1 is arranged, or a plurality of rear slits R1 are dispersedly arranged. In the present embodiment, as shown in FIGS. 1 and 6, four rear slits R1 are dispersedly arranged in each of the pair of rear slit regions RSr and RSl. When only one rear slit R1 is arranged in the rear slit regions RSr and RSl, the one rear slit R1 itself is the rear slit regions RSr and RSl. Further, when a plurality of rear slits R1 are dispersedly arranged in the rear slit regions RSr and RSl, the ranges of the regions RSr and RSl are respectively set as shown in FIG. The length from the front end to the rear end of the rearmost rear slit R1 is defined as the vertical length, and the length from the inner edge of the innermost rear slit R1 in the horizontal direction Y to the outer edge of the rearmost rear slit R1 is defined. It is the range of a rectangle in plan view, which is the length in the horizontal direction.

  The number of rear slits R1 in each of the pair of rear slit regions RSr and RSl is not particularly limited, but is preferably 2 or more, more preferably 3 or more, and preferably 9 or less, more preferably 7 or less. is there.

  When each of the pair of rear slit regions RSr and RSl has a plurality of rear slits R1, the plurality of rear slits R1 are either one of a plan view shape and an inclination angle with respect to a vertical center line CL (vertical direction X). Or both may be the same or different. When each of the rear slit regions RSr and RSl has a plurality of rear slits R1, the position of the rear slits R1 in the horizontal direction Y as shown in FIG. However, a pattern in which two or more rear slits R1 differ from each other is preferable.

  In the napkin 1, as shown in FIG. 6, the plurality of rear slits R1 in each of the rear slit regions RSr and RSl have the same shape in plan view and the same inclination angle with respect to the vertical center line CL, and each rear slit R1 has a vertical center. It extends in a straight line parallel to the line CL. Each of the rear slit regions RSr and RSl has four rear slits R1, and the four rear slits R1 are distributed in both the vertical direction X and the horizontal direction Y, and more specifically. Are arranged in a staggered pattern. The staggered arrangement of the rear slits R1 in each of the rear slit regions RSr and RSl is, specifically, a slit row in which a plurality (two) of rear slits R1 are intermittently arranged in the vertical direction X, and the slits are formed. When the row is projected in the horizontal direction Y, a projection image of another rear slit R1 adjacent to the slit row in the horizontal direction Y is arranged between the projection images of the rear slits R1 forming the slit row. It is.

  The rear slit R1 preferably penetrates through the absorber 4 as shown in FIG. Further, as shown in FIG. 4, the rear slit R1 is preferably not formed on the top sheet 2 and the back sheet 3 disposed above and below the absorber 4. Although not shown, when another sheet is interposed between the topsheet 2 and the absorber 4, it is preferable that the rear slit R1 is not formed on the other sheet. As the “another sheet” here, for example, a liquid-permeable sheet such as a nonwoven fabric, which is called a sublayer in the technical field, is exemplified.

  The rear slit region RS greatly contributes to improving the fit of the napkin 1. Since a nighttime sanitary napkin such as the napkin 1 has a relatively long length in the vertical direction X, it is required that the sanitary napkin closely adheres over a wide range in the front-rear direction of the crotch portion. However, in particular, the excretory portion such as the vaginal opening and its vicinity have a relatively large radius of curvature and a small degree of curvature, whereas the buttocks groove and its vicinity located behind (dorsal) than the excretory portion have a curvature. Since the radius is relatively small and the degree of curvature is large, the continuous shape from the excretory part to the groove of the buttocks has a drastic change in surface shape, and therefore, the conventional nighttime sanitary napkin did not have a sufficient fit to the part. . On the other hand, in the napkin 1, since the absorber 4 has the rear slit region RS having the above-described configuration in the rear portion R, the napkin 1 is twisted with respect to a portion extending from the excretory portion where the surface shape changes drastically to the groove of the buttocks. It can be deformed without causing it to adhere with good fit.

  In addition, in the napkin 1, as shown in FIG. 1, the standing-inhibiting portion 55 located at the rear portion R of the leak-prevention cuff 5 is located behind the vertical rear end of the rear slit region RS in the vertical direction X. With this configuration, the uprightness of the leak prevention cuff 5, particularly the uprightness at the rear portion R, is enhanced. The napkin 1 cooperates with the above-described rear slit R <b> 1, and has good followability to a portion extending from the excretory portion to the groove of the buttocks (hip cleft), which is a portion where the surface shape is particularly drastically changed in the crotch portion of the wearer. Since the leak tight cuff 5 fits tightly so as to wrap around the buttocks, it is possible to effectively prevent liquid leakage from the rear part when the wearer goes to bed, which is a problem specific to nighttime sanitary napkins.

  Here, the “vertical rear end of the rear slit region RS” is the rear end of the rear slit R1 located rearmost in the vertical direction X in the rear slit region RS. As in the present embodiment, when there are a plurality of rear slit regions RS, of all the rear slits R1 in the plurality of rear slit regions RS, the vertical slit X of the rear slit R1 located at the rearmost position in the vertical direction X is set. Is the "vertical rear end of the rear slit region RS". For example, in the napkin 1 of the present embodiment, as the rear slit region RS, a pair of rear slit regions RSr and RSl are present on the left and right. As shown in FIG. 6, one rear slit region RSr and the other rear slit region RSl are provided. When the position of the rear end in the vertical direction is the same, the rear end in the vertical direction of the rear slit R1 located at the rearmost position in the vertical direction X in each of the regions RSr and RSl is the same as the vertical direction of the rear slit region RS. Rear end ", and when the position is different, the rear end of the vertical slit X of the rear slit R1 positioned rearmost in the vertical direction X in the region RSr or RSl positioned relatively rear in the vertical direction X, This is the “vertical rear end of the rear slit region RS”. That is, when the position of the rear end in the vertical direction is different between the one rear slit region RSr and the other rear slit region RSl, the standing obstruction portion 55 is positioned rearward in the vertical direction X than the rearmost position in the vertical direction X. Should just be located. According to the napkin 1 having such a configuration, even when the elongation stress of the elastic member 7 constituting the leak-proof cuff 5 is low, the leak-proof cuff 5 is easily erected and fits so as to wrap the buttocks of the wearer. This solves a problem specific to nighttime sanitary napkins, in which body fluid such as menstrual blood travels along the wearer's body and leaks to the outside when the wearer goes to bed.

  Particularly, in the present embodiment, a pair of rear slit regions RSr and RSl are arranged on both sides of a vertical center line CL extending in the vertical direction X by bisecting the absorber 4 in the horizontal direction Y as shown in FIG. Since the one rear slit region RSr and the other rear slit region RSl are separated in the lateral direction Y, the napkin 1 deforms when deforming so as to follow the groove of the buttocks of the wearer. The likelihood of occurrence is further reduced and the fit is further enhanced.

  From the viewpoint of more reliably exerting the function and effect by devising the positional relationship between the upright obstruction portion 55 of the leak prevention cuff 5 and the rear slit regions RSr and RSl, the upright obstruction portion 55 and the rear slit region are provided. The distance G1 (see FIG. 1) between the RS (RSr, RSl) and the rear end in the vertical direction is preferably 5.0% or more, more preferably 6.%, with respect to the entire length of the absorbent main body 10 in the vertical direction X. 25% or more, and preferably 15% or less, more preferably 12.5% or less. Further, the separation distance G1 is preferably 15 mm or more, more preferably 25 mm or more, and preferably 60 mm or less, more preferably 50 mm or less. When the separation distance G1 is in the range described above, the deformation of the napkin 1 useful for fitting to the wearer's body is easily transmitted to the leak-proof cuff 5 from the rear portion R to the middle portion M, and when the napkin 1 is worn. When the standing ability of the leak-prevention cuff 5 is further enhanced, a high leakage prevention effect can be obtained.

  In the napkin 1, in the upright state of the leak-preventing cuff 5, as shown in FIGS. 3 and 4, the inner extension 52 constituting the upright portion 51 is a base end which is the upright base end at the time of uprightness. It is located inward in the horizontal direction Y from the part 50. With such a configuration, a pocket-like structure P capable of catching excreted fluid such as menstrual blood is formed between the topsheet 2 and the upright standing portion 51 (inwardly extending portion 52). The leakage of excreted liquid to the outside, that is, the so-called lateral leakage, is effectively prevented. Therefore, according to the napkin 1, the function and effect of the rear slit regions RSr and RSl described above and the function and effect of the position of the stand-up inhibiting portion 55 are combined, and liquid leakage particularly at the rear portion R can be effectively prevented.

  On the skin-facing surface of the absorbent main body 10, as shown in FIG. 1, a vertical groove 8 extending in the vertical direction X is formed as a groove in which the top sheet 2 and the absorber 4 are integrally recessed on the back sheet 3 side. A pair of horizontal grooves 9 are formed at predetermined intervals in the horizontal direction Y, and extend in the horizontal direction Y, and are connected to the rear ends of the pair of vertical grooves 8, 8 in the vertical direction X. Each of the pair of vertical grooves 8, 8 is continuous from the front part F to the rear part R through the middle part M. The horizontal groove 9 has a convex shape projecting outward in the vertical direction X in plan view as shown in FIG. 1, and the top of the convex is located on the vertical center line CL.

  The vertical groove 8 may have a linear shape extending in the vertical direction X in a plan view, and the angle between the longitudinal direction and the vertical direction X may be less than 45 degrees. The horizontal groove 9 may have a linear shape extending in the horizontal direction Y in a plan view, and the angle between the longitudinal direction and the horizontal direction Y may be less than 60 degrees. In addition, both grooves 8 and 9 may be continuous linear grooves in which concave portions (portions where the top sheet 2 and the absorber 4 are integrally recessed into the back sheet 3) are continuous along the longitudinal direction, or Alternatively, the concave portions and the non-recess portions (flat portions) may be discontinuous linear grooves alternately arranged in the longitudinal direction. In the discontinuous groove, the interval between the concave portions adjacent in the longitudinal direction (the length of the non-recessed portion in the longitudinal direction) is preferably 5 mm or less. The connection between the vertical groove 8 and the horizontal groove 9 is not limited to the form in which the concave portions of both the grooves 8 and 9 are continuous, and the form in which a non-recessed portion is interposed between the vertical groove 8 and the horizontal groove 9. In the latter form, the distance between the vertical groove 8 and the horizontal groove 9 (the length of the interposed non-recessed portion along the longitudinal direction of both grooves 8, 9) is preferably 5 mm or less.

  In the present embodiment, a lateral groove 9 is formed in each of the front part F and the rear part R. The horizontal groove 9 of the front portion F is connected to the front end of each of the pair of vertical grooves 8 and 8 in the vertical direction X, and the horizontal groove 9 of the rear portion R is connected to the rear end of each of the pair of vertical grooves 8 and 8 in the vertical direction X. The connected body of the two grooves 8 and 9 has a closed ring shape in plan view. The vertical groove 8 and the horizontal groove 9 are formed symmetrically with respect to the vertical center line CL. In a region surrounded by the vertical groove 8 and the horizontal groove 9, there is a middle and high portion 43 (a region in the intermediate portion M where the basis weight of the water-absorbing material is higher than that of the front portion F and the rear portion R) described later. I have.

  As shown in FIGS. 1 and 7, the skin-facing surface of the absorbent main body 10 has a portion (lateral groove portion) extending inward in the vertical direction X from the lateral groove 9 of the rear portion R. ) 13b are formed. The inner groove 13 is located behind the middle and high portions 43 in the vertical direction X in a region surrounded by the vertical grooves 8 and the horizontal grooves 9. The inner groove 13 includes a pair of vertical grooves 13a, 13a extending in the vertical direction X, and a horizontal groove 13b connected to a rear end of each of the vertical grooves 13a, 13a in the vertical direction X. It is formed symmetrically with respect to CL. The horizontal groove portion 13b has a convex shape projecting outward in the vertical direction X in plan view, and the convex top is located on the vertical center line CL. The connecting portion between the vertical groove portion 13a and the horizontal groove portion 13b is located at the inflection point of the inner groove 13, and therefore, the horizontal groove portion 13b is located more outward in the vertical direction X than the inflection point of the inner groove 13. To position. The description of the grooves 8 and 9 described above is applied to the inner groove 13 as appropriate.

  Note that the rear end of the inner groove 13 is located forward of the upright inhibiting portion 55 of the rear portion R in the vertical direction X. For this reason, when the napkin 1 is deformed into a boat shape, the rear portion R can suppress the excessive deformation of the absorber 4 while allowing the deformation in accordance with the motion and the body shape of the wearer, so that the leak-proof cuff 5 (the upright portion) It is possible to further enhance the standing ability of 51). In particular, as shown in FIG. 1, the lateral groove 13 b of the inner groove 13 is arranged so as to overlap the rear flap portion fixing member 11 in the horizontal direction Y, thereby suppressing the displacement of the rear portion R in the vertical direction X. However, since it is possible to perform appropriate deformation, it is possible to further enhance the uprightness of the leak-proof cuff 5 (the upright portion 51) during wearing.

  The grooves 8, 9 and 13 function as so-called leak-proof grooves, and can suppress the diffusion of the liquid in the plane direction of the absorber 4, particularly in the lateral direction Y, and can prevent the absorber 4 from twisting. The grooves 8, 9, and 13 can be formed by a pressing method with or without heat, or by embossing such as ultrasonic embossing in accordance with a conventional method. In the grooves 8, 9, and 13, the topsheet 2 and the absorber 4 are integrated by heat fusion or the like, and the bottoms of the grooves 8, 9, and 13 are denser than their peripheral parts.

  In the napkin 1, as described above, the position of the upright blocking portion 55 of the rear portion R is devised in relation to the vertical rear ends of the rear slit regions RSr and RSl. Although the uprightness is enhanced, in the present embodiment, such a position is further devised in relation to the lateral groove 9, so that the uprightness of the leakage prevention cuff 5 is further enhanced. Specifically, as shown in FIG. 7, in the present embodiment, the upright obstruction portion 55 of the rear portion R overlaps with the vertical front end 9 a of the horizontal groove 9 or is located behind the vertical groove 9 in the vertical direction X. I have. The vertical front end 9a of the horizontal groove 9 is located at a connecting portion between the vertical groove 8 and the horizontal groove 9, that is, at an inflection point. With such a configuration, the rear portion R of the napkin 1 is convex on the non-skin facing surface side, that is, the back sheet 3 side (concave surface on the skin facing surface side, that is, the top sheet 2 side) with the vertical front end 9a of the horizontal groove 9 as a starting point. The pocket P-like structure P (see FIGS. 3 and 4) of the leak-preventing cuff 5 has a deeper shape because it is easily bent into a so-called boat shape. Liquid leakage is more effectively prevented. From the viewpoint of more reliably achieving such an effect, the separation distance G2 (see FIG. 7) between the upright inhibiting portion 55 and the longitudinal front end 9a of the horizontal groove 9 is preferably 35 mm or less, more preferably 30 mm or less. It is as follows.

  Further, in the present embodiment, as shown in FIG. 7, the standing obstruction portion 55 of the rear portion R is located rearward of the rear flap portion fixing member 11 in the vertical direction X. With such a configuration, the portion of the napkin 1 located rearward of the rear flap portion fixing member 11 in the vertical direction X, in particular, the rear end of the napkin 1 in the vertical direction X rises the leak-proof cuff 5 (the upright portion 51). As a result, the hips are easily deformed so as to wrap around the buttocks, so that the fitting property and the liquid leakage preventing property are further improved, and the liquid leakage at bedtime is more effectively prevented. From the viewpoint of more reliably achieving such an operation and effect, the separation distance G3 (see FIG. 7) between the upright inhibiting portion 55 and the rear flap portion fixing member 11 is preferably 10 mm or more, more preferably 15 mm or more. And preferably 40 mm or less, more preferably 35 mm or less.

  Each of the pair of vertical grooves 8, 8 has a constricted portion 80 at the rear portion R in plan view as shown in FIG. In the embodiment shown in FIG. 7, each of the pair of vertical grooves 8, 8 has two constricted portions 80. The constricted portion 80 is a portion that can be a starting point when the napkin 1 is deformed into a so-called boat shape so as to be convex on the non-skin-facing surface side, and the presence of the constricted portion 80 facilitates such deformation of the napkin 1. obtain.

  Note that the vertical groove 8 may have a dividing portion instead of the constricted portion or together with the constricted portion. The dividing portion is a portion where the continuity of the vertical groove 8 is lost, and includes a portion where the concave portion constituting the vertical groove 8 is not formed, that is, a non-recessed portion (flat portion). Similarly to the constricted portion, the dividing portion is a portion that can be a starting point when the napkin 1 is deformed into a so-called boat shape so as to protrude toward the non-skin-facing surface side.

  A plurality of recesses 14 are intermittently arranged in one direction behind the lateral groove 9 on the skin-facing surface of the absorbent main body 10 in one direction, and extend outward in the vertical direction X in plan view. A concave portion row 15 having a convex curved shape (arc shape) is formed. The recessed portion 14 is a portion in which the topsheet 2 and the absorber 4 are integrally recessed on the backsheet 3 side, similarly to the portions constituting the grooves 8, 9, and 13. The interval between the adjacent concave portions 14 in the concave portion row 15 is preferably 5 mm or more, more preferably 7 mm or more, and preferably 15 mm or less, more preferably 13 mm or less. The concave row 15 has a larger radius of curvature than the horizontal groove 9, that is, a smaller curvature than the horizontal groove 9. The radius of curvature of the recess row 15 is the radius of curvature of a virtual curve (dotted line in FIG. 7) passing through all the recesses 14 constituting the recess row 15.

  As described above, the vertical groove 8 has the constricted portion 80 at the rear portion R, which serves as a starting point when the rear portion R is deformed into a boat shape, and satisfies a predetermined condition behind the horizontal groove 9 in the vertical direction X. When the concave portion row 15 is formed, the standing inhibition portion 55 of the rear portion R is located at the rearmost position in the vertical direction X among the constricted portions 80 of the vertical groove 8 as shown in FIG. Between the virtual straight line V1 extending in the horizontal direction Y through the rear end R and the virtual straight line V2 extending in the horizontal direction Y through the rear end of the concave portion row 15 in the vertical direction X. Deformation to a boat shape is more likely to occur, and as a result, the fit of the napkin 1 in the longitudinal direction X can be further improved. In particular, since the standing-inhibiting portion 55 is located ahead of the virtual straight line V2 in the vertical direction X, the leak-preventing groove is doubled, and the portion that is difficult to be deformed into a boat shape is formed on the non-skin facing surface. It is pulled up to the wearer's body side so as to be convex to the side, so as to promote deformation into a boat shape.

  Further, the presence of the row of recesses 15 at the rear end of the napkin 1, which is a portion located in the vertical direction X behind the horizontal groove 9, imparts hardness to the rear end, so that the napkin 1 The rear end is effectively prevented from being bent or turned during wearing. On the other hand, due to the presence of the concave row 15 at the rear end of the napkin 1, there is a concern that the fit of the napkin 1 may be deteriorated due to a decrease in the flexibility of the rear end and a sense of incongruity may be felt when worn. In this regard, by setting the interval between the adjacent recessed portions 14 in the recessed portion row 15 to be 5 mm or more, a decrease in the flexibility and the like of the rear end portion is minimized. Concerns have been dispelled. Further, with respect to the radius of curvature, a magnitude relationship of “curvature radius of the lateral groove 9 positioned relatively forward in the vertical direction X <curvature radius of the recessed row 15 positioned relatively rearward in the vertical direction X” is established. Since the flexibility (easiness of deformation) of the rear portion R increases from the front to the rear in the vertical direction X, unintended wrinkles and breaks when the napkin 1 is worn can be effectively prevented. This prevents the napkin 1 wearer from feeling uncomfortable. In particular, in the present embodiment, considering the radius of curvature of the horizontal groove portion 13b of the inner groove 13 located in front of the horizontal groove 9 in the vertical direction X, as shown in FIG. From the front to the rear in the direction X, the magnitude relationship of “lateral groove portion 13b <lateral groove 9 <recess portion row 15” is established, so that wrinkles and breakage of the rear portion R are more effectively prevented, and Can be more effectively reduced.

  Further, in the napkin 1, as described above, as shown in FIG. 2, the main body fixing member 12 arranged on the non-skin-facing surface of the absorbent main body 10 is intermittently arranged in the vertical direction X. The napkin 1 as a whole is more likely to be deformed into a boat shape, and the fitting property is further improved, in combination with the function and effect of the positional relationship between the portion 55 and the virtual straight lines V1, V2.

  The length in the vertical direction X of the free end of the portion of the leak-preventing cuff 5 sandwiched between the upright blocking portions 55 at both ends in the vertical direction X, that is, the length of the edge 52 a of the inner extension 52 of the upright portion 51. It is preferable that the length in the direction X is shorter than the length in the longitudinal direction X of the non-erected portion of the leak prevention cuff 5. Here, the “non-standing portion of the leak-proof cuff 5” is the base end portion 50, which is a portion serving as a rising base end when the leak-proof cuff 5 stands. Further, the “length” here means the length of each part in a state where the leak prevention cuff 5 is maximally extended against the contraction force of the elastic member 7. As described above, “the vertical length of the free end (the edge 52a of the inner extension 52 of the upright portion 51) of the portion sandwiched between the upright inhibition portions 55, 55 <the non-upright portion (base) of the leakproof cuff 5 Since the magnitude relation of “length of the end portion 50) in the vertical direction” is established, the deformation amount is larger on the non-standing portion side than on the free end side, and the pocket-like structure P of the leak-proof cuff 5 described above. (See FIG. 3 and FIG. 4) can easily be deformed according to the shape of the buttocks of the wearer, so that the liquid leakage prevention can be further improved. The vertical length of the non-standing portion (base end portion 50) of the leak-preventing cuff 5 and the free end (edge 52a of the inner extension portion 52 of the rising portion 51) of the portion sandwiched between the rising prevention portions 55, 55. Assuming that the former> the latter, the ratio to the longitudinal direction is preferably 1.01 or more, more preferably 1.03 or more, and preferably 1.30 or less, more preferably 1.25, as the former / the latter. It is as follows.

  The absorber 4 will be further described. The absorber 4 includes a water-absorbing material. As the water-absorbing material, those usable in the absorbent of this type of absorbent article can be used without any particular limitation. Examples thereof include hydrophilic fibers and water-absorbing polymers. Alternatively, two or more kinds can be used in combination. The hydrophilic fiber may be an inherently hydrophilic fiber or a fiber obtained by subjecting a hydrophobic fiber to a hydrophilic treatment. The former fiber is particularly preferred. Natural fibers, cellulosic regenerated fibers or semi-synthetic fibers are preferred examples of inherently hydrophilic fibers, with pulp and rayon being preferred. Examples of the pulp include wood pulp such as softwood kraft pulp and hardwood kraft pulp, and non-wood pulp such as cotton pulp and straw pulp, but are not particularly limited. Further, a crosslinked cellulose fiber obtained by crosslinking the inside and / or between the molecules of the cellulose fiber, or a bulky cellulose fiber obtained by mercerizing wood pulp may be used. As the water-absorbing polymer, a particulate polymer is generally used, but a fibrous polymer may be used. The shape of the particulate water-absorbing polymer is not particularly limited, and may be, for example, a sphere, a lump, a bale, or an irregular shape. The water-absorbing polymer is typically based on a polymer or copolymer of acrylic acid or an alkali metal acrylate.

  As shown in FIGS. 3 to 5, the absorbent body 4 of the napkin 1 has a central absorbent sheet 41 disposed to face the excretory part of the wearer when worn, a portion overlapping the central absorbent sheet 41 in plan view, and a central part. And a main body absorbent sheet 42 having a portion extending outward from the peripheral edge of the absorbent sheet 41, and is a laminated structure of a plurality of sheets. Both the absorbent sheets 41 and 42 contain a hydrophilic fiber and a water-absorbing polymer.

In the present invention, the term "absorbent sheet" means a sheet-shaped absorbent structure containing a water-absorbing material such as a hydrophilic fiber and a water-absorbing polymer, and is distinguished from a fiber-laid body formed by laminating a water-absorbing material. Is done. In general, an absorbent sheet is thinner and less rigid than a pile of water-absorbing materials, so that an absorbent article provided with an absorbent sheet is thinner and thinner, and is softer and more comfortable to wear. It is excellent, and it is compactly folded and has excellent handling characteristics. From the viewpoint of more effectively utilizing the features of such an absorbent sheet and obtaining an absorbent article having a sufficient liquid diffusing property and liquid retaining property and a good wearing feeling, 5 cN / cm ² per one absorbent sheet. Is preferably 0.1 mm or more, more preferably 0.3 mm or more, and preferably 2 mm or less, more preferably 1.5 mm or less. As the absorbent sheet, for example, those described in Japanese Patent No. 2963647 and Japanese Patent No. 2955223 can be used. Preferred examples of the absorbent sheet include, between the constituent fibers and between the constituent fibers and the water-absorbing polymer, via the adhesive force generated in the water-absorbing polymer in a wet state or a binder such as an adhesive or an adhesive fiber added separately. Are combined to form a sheet.

  As shown in FIG. 1, the central absorbent sheet 41 is provided at the central portion in the lateral direction Y of the napkin 1 or the absorbent main body 10 at the intermediate portion M or at a portion near the intermediate portion M of the intermediate portion M and the front portion F. Are arranged. As shown in FIG. 3, the central absorbent sheet 41 has a multilayer structure in which the sheet 41 is folded. The folded multilayer structure of the central absorbent sheet 41 is such that one sheet 41 having a substantially rectangular shape in a plan view extends in the vertical direction X through a position where the sheet 41 is substantially equally divided into three in the horizontal direction Y. The sheet 41 is folded to the same surface side (skin-facing surface side) at the folding line, and is formed into a so-called wound three-fold state, and has a three-layer structure of the sheet 41.

  As shown in FIGS. 3 to 5, the main body absorbent sheet 42 also has a multilayer structure in which the sheet 42 is folded. The folded multilayer structure of the main body absorbent sheet 42 is such that one sheet 42 having a substantially rectangular shape in plan view is folded on the same surface side (non-skin-facing surface side) at two bending lines extending in the vertical direction X. Further, both edges along the longitudinal direction X of the sheet 41 are formed so as to overlap each other at a central portion in the lateral direction Y, and the overlapping portion of the both edges is a three-layer structure of the sheet 42, The portion other than the overlapping portion has the two-layer structure of the sheet 42. The folded multilayer structure of the main absorbent sheet 42 forms the outer shape of the absorber 4.

  As described above, the absorber 4 of the napkin 1 has a configuration in which the folded structure of one central absorbent sheet 41 is included inside the folded structure of one main absorbent sheet 42. The middle portion of the middle portion M in the lateral direction Y is provided with a folded structure of the central absorbent sheet 41, so that the middle portion M is thicker than the peripheral portion and has a middle and high portion 43 raised on the skin facing surface side. Has become. On the other hand, portions other than the middle and high portions 43 in the absorber 4 do not have the folding structure of the central absorbent sheet 41 but include the folding structure of the main absorbent sheet 42, and have a thickness that is smaller than that of the middle and high portions 43. It is a small standard absorption section 44.

  As described above, the middle portion M includes the middle and high portions 43 which are regions where the basis weight of the water-absorbing material is higher than the front portion F and the rear portion R. As shown in FIG. 6, the middle and high section 43 is disposed at a position separated by a predetermined distance from the rear slit area RS (RSr, RSl), and a slit is formed between the middle and high section 43 and the rear slit area RS. This is a non-slit forming area that is not formed. That is, the napkin 1 has the middle and high portions 43, the non-slit forming region, and the rear slit region RS in the vertical direction X from the middle portion M toward the rear portion R. It means that the basis weight decreases toward R, that is, the rigidity decreases. With such a configuration, the napkin 1 can follow the portion of the wearer's crotch portion without particularly causing a change in the portion between the excretory portion and the buttocks groove, which is a portion where the surface shape is greatly changed. Because it is easily deformed, the fit can be improved.

  As shown in FIG. 1, the middle and high section 43 has a rectangular shape in plan view, and is disposed at the center of the middle section M in the horizontal direction Y with its longitudinal direction coinciding with the vertical direction X. However, the shape of the middle-high portion 43 in a plan view can be arbitrarily selected and is not limited to a rectangular shape. The length of the middle-high portion 43 in the vertical direction X is preferably 60 mm or more, more preferably 80 mm or more, and preferably 150 mm or less, more preferably 120 mm or less. Further, the length of the middle-high portion 43 in the horizontal direction Y is preferably 25 mm or more, more preferably 30 mm or more, and preferably 55 mm or less, more preferably 50 mm or less.

  The thickness of the middle high portion 43 in the absorber 4 is preferably 0.7 mm or more, more preferably 1 mm or more, and preferably 5 mm or less, more preferably 4 mm or less. By setting the thickness of the middle and high section 43 in such a range, it is easy to achieve both good wearing feeling and high absorption performance in the middle section M where the middle and high section 43 is formed. In addition, when the absorbent article has a wing portion as in the napkin 1, it is easy to prevent the absorber from being distorted at the intermediate portion M during mounting. Further, the thickness of the standard absorption section 44 in the absorber 4 is preferably 0.3 mm or more, more preferably 0.5 mm or more, and preferably 3 mm or less, more preferably 2.5 mm or less. By setting the thickness of the standard absorbing portion 44 in such a range, it becomes possible to further enhance the high absorbing performance and the followability to the movement of the wearer. The thickness of the absorber and the absorbent sheet is measured by the following method.

<Method for measuring thickness of absorbent sheet and absorber>
An absorptive sheet or an absorber to be measured is allowed to stand on a horizontal place without wrinkles or bending, and the thickness under a load of 5 cN / cm ² is measured. In the measurement of the thickness in the present invention, a thickness gauge PEACOCK DIAL UPRIGHT GAUGES R5-C (manufactured by OZAKI MFG.CO. LTD.) Was used. At this time, a circular or square plate (an acrylic plate having a thickness of about 5 mm) in plan view is disposed between the tip of the thickness gauge and the measurement portion of the measurement object, and the load is set to 5 cN / cm ² . Adjust the size of the plate so that

  In the napkin 1, as shown in FIG. 1, FIG. 3, and FIG. 6, the absorber 4 has a central slit region MS in the intermediate portion M where a central slit M1 extending in the vertical direction X is arranged. The central slit region MS exists so as to overlap the middle and high section 43. Due to the presence of the central slit region MS in the middle and high section 43, even when a force that compresses the absorber 4 in the lateral direction Y is applied by the wearer's thigh when the napkin 1 is worn, the absorber 4 However, since it is finely deformed at various portions of the central slit region MS, the absorber 4 and the napkin 1 are less likely to have deep wrinkles. For this reason, inconveniences caused by the deep folds, for example, the wearer may feel uncomfortable, the liquid flowing along the folds and leading to leakage can be effectively prevented. Therefore, according to the napkin 1, due to the effects of both the central slit region MS and the rear slit regions RSr, RSl, the napkin 1 is in close contact with the wearer's skin when worn, making it difficult to form a gap, and liquid leakage from the gap is effectively prevented. Is prevented.

  The center slit M1 is a cut formed in the absorber 4, and at the position where the center slit M1 is formed, the forming material of the absorber 4 is cut or the forming material is separated from and separated from other portions. . In the napkin 1, the central slit M1 has a linear shape in a plan view, but the planar shape of the central slit M1 is not limited to this, and may be a wavy line or the like. The central slit M1 may extend in the vertical direction X, and may not be parallel to the vertical center line CL as shown in the figure, and the angle between the central slit M1 and the vertical center line CL (vertical direction X) in plan view. The angle may be less than 45 degrees, preferably less than 30 degrees, particularly preferably less than 10 degrees, and most preferably 0 degree.

  In the central slit region MS, only one central slit M1 is arranged, or a plurality of central slits M1 are dispersedly arranged. This is the latter in the present embodiment. When only one central slit M1 is arranged in the central slit region MS, the single central slit M1 itself is the central slit region MS. When a plurality of central slits M1 are dispersedly arranged in the central slit region MS, the range of the region MS is, as shown in FIG. 6, the rearmost position from the front end of the central slit M1 located at the forefront in the vertical direction X. The length from the inner edge of the innermost central slit M1 in the horizontal direction Y to the outer edge of the outermost central slit M1 in the horizontal direction Y is defined as the vertical length. , A rectangular area in plan view.

  The central slit region MS may have at least one central slit M1. The number of central slits M1 in the central slit region MS is not particularly limited, but is preferably 10 or more, more preferably 20 or more, and preferably 40 or less, more preferably 30 or less. When the center slit region MS has a plurality of center slits M1, the plurality of center slits M1 may have the same or different one or both of a plan view shape and an inclination angle with respect to the vertical center line CL. Is also good. When the central slit region MS has a plurality of central slits M1, the position in the horizontal direction Y is different from that of the pattern in which the plural central slits M1 are arranged in a line in the vertical direction X as shown in FIG. A pattern having at least one central slit M1 is preferable.

  In the napkin 1, as shown in FIG. 6, the plurality of central slits M1 in the central slit region MS have the same shape in plan view and the same inclination angle with respect to the vertical center line CL. It extends in a straight line in parallel. The plurality of central slits M1 in the central slit region MS are disposed in a state of being dispersed in both the vertical direction X and the horizontal direction Y, and more specifically, are disposed in a staggered manner. The staggered arrangement of the central slit M1 is the same as the staggered arrangement of the rear slit R1 described above.

  The center slit M1 preferably penetrates the absorber 4 as shown in FIG. It is preferable that the center slit M1 is not formed on the top sheet 2 and the back sheet 3 disposed above and below the absorber 4, as shown in FIG. Although not shown, when another sheet (for example, a sublayer) is interposed between the top sheet 2 and the absorber 4, the center slit M1 may not be formed on the other sheet. preferable.

  As shown in FIG. 6, the central slit region MS and the rear slit region RS (RSr, RSl) are separated in the vertical direction X. That is, a non-slit forming region exists between the center slit region MS and the rear slit region RS. According to such a configuration, the middle portion M (the excretory portion facing portion) and the rear portion R can be more easily deformed by the expansion and contraction force of the leak prevention cuff 5 so as to fit each part of the wearer.

  And, between the central slit region MS and the rear slit region RS (RSr, RSl), a central fold line CFL, which is a fold curve used when bending the absorbent main body 10, extends in the lateral direction Y. I have. According to such a configuration, a decrease in rigidity due to the formation of a slit (cut) at and near the formation position of the center fold line CFL located between the center slit region MS and the rear slit region RS is suppressed. When the napkin 1 is worn, the center fold line CFL is pushed up from both the front and rear sides in the vertical direction X, so that the fit can be further improved. In addition, since the continuity of deformation of each of the center slit region MS and the rear slit region RS is divided by the center fold line CFL, deformation that can be fitted to the wearer's body in each region unit easily occurs. As a result, The fit of the napkin 1 can be further improved.

  Distance d7 between the rear end of the central slit region MS (that is, the rear end of the central slit M1 located at the rearmost position in the vertical direction X in the central slit region MS) and the vertical front end of the rear slit region RS (see FIG. 6). Is preferably at least 20 mm, more preferably at least 25 mm. Here, the “vertical front end of the rear slit region RS” is defined by the same concept as the “vertical rear end of the rear slit region RS” described above. In the embodiment shown in FIG. It is the front end of the rear slit R1 located at the forefront in the vertical direction X in each of the regions RSr and RSl. If the separation distance d7 is too long, the effect of making the center fold line CFL adhere to the skin is weakened, and a gap between the napkin 1 and the skin may be easily generated. Therefore, the upper limit of the separation distance S7 is preferably 40 mm. More preferably, it is 35 mm.

From the viewpoint of more reliably exerting the above-described functions and effects, it is preferable that the dimensions of each part of the absorber 4 be set as follows.
The interval d1 (see FIG. 6) of the portion having the smallest interval in the lateral direction Y between the pair of rear slit regions RSr and RSl is preferably 10 mm or more, more preferably 20 mm or more, and preferably 40 mm or less, more preferably It is 30 mm or less.

  The distance d2 between the center fold line CFL and the rear slit region RS (RSr, RSl), that is, the distance d2 between the center fold line CFL and the rearmost slit R1 positioned at the forefront in the vertical direction X in the rear slit region RS (FIG. 6). Is preferably 10 mm or more, more preferably 15 mm or more, and preferably 40 mm or less, more preferably 35 mm or less. In the actual product, the center folding line CFL usually has a predetermined length, that is, a width in the vertical direction X, and has a narrow band shape in a plan view wider than the thin line as illustrated. The distance d2 with respect to the narrow band-shaped center folding line CFL is a pair of side ends (a front side end and a rear side end) along a direction in which the center folding line CFL extends (the horizontal direction Y in the illustrated embodiment). The rear end located on the rear side in the vertical direction X is measured as the measurement position on the side of the center folding line CFL, that is, the rear end of the center folding line CFL and the rear slit. It means the distance to the area RS. When the center fold line is not a straight line parallel to the horizontal direction Y as shown in FIG. 6, the distance d2 between the non-linear center fold line CFL and the rear slit region RS is the vertical center line CL. The rear end of the central folding line CFL located above is measured as a measurement position on the side of the central folding line CFL.

The length L1 (see FIG. 6) of the rear slit R1 in the vertical direction X is preferably 10 mm or more, more preferably 15 mm or more, and preferably 35 mm or less, more preferably 25 mm or less.
The length of the rear slit R1 in the lateral direction Y, that is, the width b1 (see FIG. 6) is preferably 0.1 mm or more, more preferably 0.2 mm or more, and preferably 1 mm or less, more preferably 0.8 mm or less. is there.
In the rear slit regions RSr and RSl, a plurality of rear slits R1 are arranged in a line in the vertical direction X, and the intervals in the vertical direction X between the rear slits R1 and R1 in the vertical slit row (the vertical direction in one rear slit region). Is preferably 10 mm or more, more preferably 15 mm or more, and preferably 35 mm or less, more preferably 25 mm or less.
In the rear slit regions RSr and RSl, a plurality of rear slits R1 are arranged in a row in the horizontal direction Y, and the interval in the horizontal direction Y between the rear slits R1 and R1 in the horizontal slit row (the horizontal direction in one rear slit region). Is preferably 5 mm or more, more preferably 10 mm or more, and preferably 25 mm or less, more preferably 20 mm or less.

The length L2 (see FIG. 6) of the central slit M1 in the longitudinal direction X is preferably 10 mm or more, more preferably 15 mm or more, and preferably 35 mm or less, more preferably 25 mm or less.
The length of the central slit M1 in the lateral direction Y, that is, the width b2 (see FIG. 6) is preferably 0.1 mm or more, more preferably 0.2 mm or more, and preferably 1 mm or less, more preferably 0.8 mm or less. is there.
In the central slit region MS, a plurality of central slits M1 are arranged in a line in the vertical direction X, and the interval in the vertical direction X between the central slits M1 and M1 in the vertical slit row (the central slit region is closest to each other in the vertical direction). The vertical gap d5 (see FIG. 6) between the central slits is preferably 10 mm or more, more preferably 15 mm or more, and preferably 35 mm or less, more preferably 25 mm or less.
In the central slit region MS, a plurality of central slits M1 are arranged in a row in the horizontal direction Y, and the intervals in the horizontal direction Y between the central slits M1 and M1 in the horizontal slit row (the closest to each other in the horizontal direction in the central slit region). The distance d6 (see FIG. 6) between the center slits is preferably 5 mm or more, more preferably 10 mm or more, and preferably 25 mm or less, more preferably 20 mm or less.

  The distance d1 (see FIG. 6) between the pair of rear slit areas RSr and RS1 at the narrowest distance in the horizontal direction Y is two central slits M1 and M1 adjacent to each other in the horizontal direction Y in the central slit area MS. Wider than the distance d6 between the horizontal directions Y (see FIG. 6), and wider than the horizontal length of one region at the center in the horizontal direction when the middle and high portions 43 are equally divided into five in the horizontal direction Y. Is preferred. With such a configuration, when the napkin 1 is worn, the portion having the distance d1 (the central portion in the lateral direction Y of the rear portion R) more stably follows the buttocks of the wearer, and the fit and the spreadability are improved. As a result, leakage prevention can be further improved. The ratio of the distance d1 to the distance d6 is preferably at least 1.1, more preferably at least 1.3, and preferably at most 3, and more preferably at most 2.5 as the former / the latter. Further, the ratio of the interval d1 to the lateral length of one region in the lateral center of the middle and high section 43 is preferably 1.5 or more, more preferably 2 or more, and preferably 6 or less as the former / the latter. Preferably it is 5 or less.

  FIG. 8 shows a main part of another embodiment of the absorbent article of the present invention. In other embodiments described later, components different from the napkin 1 described above will be mainly described, and similar components will be denoted by the same reference numerals and description thereof will be omitted. The description of the napkin 1 is appropriately applied to components that are not particularly described.

  In the napkin 1A shown in FIG. 8, the upright obstruction portion 55 of the rear portion R includes a plurality of streak fixing portions 57 that obliquely intersect the elastic member 7 in a plan view. In the embodiment shown in FIG. 8, one stand-up inhibiting portion 55 is configured to include three streak fixing portions 57, and the three streak fixing portions 57 are intermittently arranged in the vertical direction X. Each streak-like fixing portion 57 has a quadrangular shape in a plan view, and its longitudinal direction obliquely intersects the elastic member 7 extending in the vertical direction X, not orthogonally. Further, each of the strip-like fixing portions 57 has an inner edge (an edge relatively closer to the vertical center line CL) in the vertical direction X than an outer edge (an edge relatively closer to the vertical center line CL). It is arranged so that it may be located ahead of. Since the standing-up inhibiting portion 55 of the rear portion R is configured to include such a plurality of streak fixing portions 57, the flexibility of the leak-proof cuff 5 in the standing state and the flexibility of the standing-up state cuff 5 are not impaired. The ability to follow the body can be improved.

Although the present invention has been described above, the present invention is not limited to the above embodiment, and can be appropriately changed without departing from the spirit of the present invention.
For example, in the above-described embodiment, the absorber is composed only of the absorbent sheet. However, the absorbent body may be composed only of the laminated body obtained by laminating the water-absorbing material, or may be composed of both. You may. Further, the multilayer structure of the absorbent sheet in the absorber may be a configuration in which one absorbent sheet is folded and formed as in the above-described embodiment, or a plurality of absorbent sheets are laminated without being folded. A configuration may be used, or a configuration in which both configurations are combined may be used. Configurations different from each other in the plurality of embodiments described above may be appropriately changed, replaced, or combined.

  INDUSTRIAL APPLICABILITY The present invention can be applied to all articles used for absorbing body fluids such as menstrual blood, urine, stool, and sweat, but is particularly worn for women's absorbent articles such as sanitary napkins, especially worn at night. It is suitable for absorbent articles for women at night. As the absorbent article for women, in addition to the sanitary napkin as in the above embodiment, for example, a panty liner, an incontinence pad and the like can be mentioned. Regarding the embodiment of the present invention, the following supplementary notes are further disclosed.

<1> An intermediate portion including a longitudinal direction corresponding to the front-back direction of the wearer and a lateral direction orthogonal thereto, and including an excretory portion facing portion facing the excretory portion of the wearer when worn, and a longitudinal direction from the intermediate portion. A front portion extending forward, a rear portion extending longitudinally rearward from the middle portion, and an absorbent body; and a pair of absorbent bodies disposed on both side portions of the absorbent body along the longitudinal direction. An absorbent body containing a water-absorbing material, a surface sheet disposed on the skin-facing surface side of the absorbent body, and a surface sheet disposed on the non-skin-facing surface side of the absorbent body. And a pair of the leak-proof cuffs are each configured to include a leak-proof cuff sheet, and the leak-proof cuff sheet is fixed to another member. The base end portion, the leak-proof cuff sheet has an upright portion standing on the wearer side, the upright portion, It extends inward in the horizontal direction from the base end portion, and is configured to include an inward extending portion having elasticity in the longitudinal direction.The inward extending portion is provided on the top sheet in each of the front portion and the rear portion. A fixed standing obstruction portion is formed, and when worn, the standing portion sandwiched between the standing obstruction portions at both ends in the longitudinal direction of the leak-prevention cuff allows the edge of the inner extension portion to be a free end. As the free end stands up toward the wearer's skin side, and in the upright state, the free end is located laterally inward of the base end, and the absorber is vertically positioned at the rear portion. An absorbent article having a rear slit region provided with a rear slit extending in a direction, wherein the upright obstructing portion of the rear portion is positioned rearward in a vertical direction from a vertical rear end of the rear slit region.
<2> The absorbent article according to <1>, wherein the rear slit region is provided as a pair on both sides of an imaginary vertical center line extending in the vertical direction by bisecting the absorber horizontally.
<3> The separation distance between the upright obstruction portion and the vertical rear end of the rear slit region is 5.0% or more, and preferably 6.25% or more, with respect to the entire length of the absorbent main body in the vertical direction. And the absorptive article given in the above <1> or <2> which is 15% or less, preferably 12.5% or less.
<4> The above-mentioned <1> to <3>, in which the separation distance between the upright position inhibiting portion and the vertical rear end of the rear slit region is 15 mm or more, preferably 25 mm or more, and 60 mm or less, preferably 50 mm or less. The absorbent article according to any one of the above.

<5> On the skin-facing surface of the absorbent main body, a vertical groove extending in the vertical direction as a groove formed by integrally recessing the topsheet and the absorber on the backsheet side is predetermined in the horizontal direction. A pair of spaced-apart horizontal grooves are formed, and the horizontal grooves extending in the horizontal direction are connected to the vertical rear ends of the pair of vertical grooves, respectively. The absorbent article according to any one of <1> to <4>, wherein the absorbent article overlaps the front end in the vertical direction or is located rearward in the vertical direction.
<6> The absorbent article according to <5>, wherein a vertical separation distance between the standing-inhibiting portion and a vertical front end of the horizontal groove is 35 mm or less, and preferably 30 mm or less.
<7> The rear flap portion configured to include members extending laterally outward from both side edges along the vertical direction of the absorber on both side portions of the rear portion along the vertical direction. Having a rear flap portion fixing material for fixing the rear flap portion to the wearer's clothes on the non-skin facing surface of the rear flap portion,
The absorptive article according to any one of <1> to <6>, wherein the upright obstruction portion of the rear portion is located rearward in the vertical direction from the rear flap portion fixing member.
<8> The absorption according to <7>, wherein a vertical separation distance between the standing-up inhibiting portion and the rear flap portion fixing member is 10 mm or more, preferably 15 mm or more, and 40 mm or less, preferably 35 mm or less. Products.
<9> On the skin-facing surface of the absorbent main body, a vertical groove extending in the vertical direction as a groove formed by integrally recessing the topsheet and the absorber on the backsheet side is predetermined in the horizontal direction. A pair of grooves are formed at intervals, and a horizontal groove extending in the horizontal direction is connected to a vertical rear end of each of the pair of vertical grooves,
Each of the pair of vertical grooves has a constricted portion or a divided portion in the rear portion in a plan view, and a plurality of recessed portions are formed in one direction in a vertical direction rearward of the horizontal groove on the skin facing surface of the absorbent body. A row of concave portions is formed intermittently and has a curved shape convex outward in the vertical direction in plan view, and the interval between adjacent concave portions in the concave row is 5 mm or more; The row has a larger radius of curvature than the lateral groove,
The upright obstruction portion of the rear portion includes a virtual straight line extending in the horizontal direction through the narrowed portion or the divided portion of the vertical groove, which is positioned rearmost in the vertical direction, and the vertical direction of the concave portion row. The absorbent article according to any one of <1> to <8>, wherein the absorbent article is located between a virtual straight line extending laterally through a rear end.
<10> The absorbent article according to <9>, wherein an interval between the adjacent concave portions in the concave portion row is 5 mm or more, preferably 7 mm or more, and 15 mm or less, preferably 13 mm or less.
<11> The <9> or <10> according to the above <9> or <10>, wherein a main body fixing member for fixing the absorbent main body to a wearer's clothes is intermittently arranged in a longitudinal direction on a non-skin facing surface of the absorbent main body. Absorbent articles.

<12> An elastic member is disposed in an edge region of the inner extending portion, and the upright obstructing portion at the rear portion includes a plurality of streak fixing portions obliquely intersecting the elastic member in plan view. The absorbent article according to any one of the above items <1> to <11>, comprising:
<13> The vertical length of the free end of the upright portion sandwiched between the upright inhibiting portions at both ends in the vertical direction of the leakproof cuff is smaller than the vertical length of the non-erected portion of the leakproof cuff. The absorbent article according to any one of <1> to <12>, wherein the absorbent article is short.
<14> The absorbent article according to any one of <1> to <13>, wherein a region in which the basis weight of the water-absorbing material is higher than that of the rear portion exists in the intermediate portion.
<15> The absorber has a central slit region provided with a central slit extending in the longitudinal direction in the intermediate portion, and the central slit region and the rear slit region are vertically separated from each other. The absorbent article according to any one of 1> to <14>.
<16> The absorbent article according to <15>, wherein a fold curve used when bending the absorbent body extends in a lateral direction between the central slit region and the rear slit region.

<17> On the skin-facing surface of the absorbent main body, a vertical groove extending in the vertical direction as a groove formed by integrally recessing the topsheet and the absorber on the backsheet side is predetermined in the horizontal direction. A pair of grooves are formed at intervals, and a horizontal groove extending in the horizontal direction is connected to a vertical rear end of each of the pair of vertical grooves,
Further, on the skin-facing surface of the absorbent main body, an inner groove is formed in the longitudinal direction more inward than the lateral groove of the rear portion, and the inner groove is a longitudinal groove portion extending in the longitudinal direction and a lateral groove. The absorbent article according to any one of <1> to <16>, having an extending lateral groove.
<18> The absorptivity according to <17>, wherein the inner groove is located rearward in the vertical direction in a region surrounded by the vertical groove and the horizontal groove, than in a region where the basis weight of the water-absorbing material is higher. Goods.
<19> The vertical groove portions are formed in a pair at predetermined intervals in a horizontal direction, the horizontal groove portions are connected to respective vertical rear ends of the pair of vertical groove portions, and the inner grooves are It is formed symmetrically with respect to the vertical center line that bisects the article in the horizontal direction and extends in the vertical direction,
The absorbent article according to <17> or <18>, wherein the horizontal groove portion has a convex shape projecting outward in the vertical direction in plan view, and a top of the convex is located on the vertical center line. .
<20> A plurality of recesses are intermittently arranged in one direction behind the horizontal groove on the skin-facing surface of the absorbent main body in one direction, and have a curved shape projecting outward in the vertical direction in plan view. A row of concave portions is formed, and an interval between adjacent concave portions in the concave row is 5 mm or more;
Regarding the radius of curvature in the rear portion, any one of the above <17> to <19>, in which the magnitude relationship of the lateral groove portion of the inner groove <the lateral groove <the concave portion row is established from the front to the rear in the longitudinal direction. 2. The absorbent article according to claim 1.
<21> The absorbent article according to any one of <17> to <20>, wherein a rear end of the inner groove is positioned longitudinally forward of the standing-inhibiting portion of the rear portion.
<22> The rear flap portion configured to include members extending laterally outward from both side edges along the vertical direction of the absorber on both side portions of the rear portion along the vertical direction. Having a rear flap portion fixing material for fixing the rear flap portion to the wearer's clothes on the non-skin facing surface of the rear flap portion,
The absorbent article according to any one of <17> to <21>, wherein the lateral groove portion is arranged to overlap the rear flap portion fixing member in a lateral direction.

<23> The absorber has a central absorbent sheet disposed to face the excretory part of the wearer when worn, and extends outward from a portion overlapping the central absorbent sheet in plan view and a peripheral edge of the central absorbent sheet. The absorbent article according to any one of <1> to <22>, further including a main body absorbent sheet having a protruding portion.
<24> The absorbent article according to <23>, wherein the central absorbent sheet and the main absorbent sheet each contain a hydrophilic fiber and a water-absorbing polymer.
<25> The absorbent article according to any one of <1> to <24>, which is a sanitary napkin having a total length in a vertical direction of 27 cm or more.

1,1A sanitary napkin (absorbent article)
2 Top sheet 3 Back sheet 4 Absorber 41 Central absorbent sheet 42 Main absorbent sheet 43 Middle / high section 44 Standard absorbent section 5 Leak-proof cuff 50 Base end section 51 Standing section 52 Inside extending section 52a Edge section of inside extending section (Free end)
55 Standing-inhibiting part 56 End fixing part 57 Streak fixing part 6 Side sheet (leak prevention cuff sheet)
Reference Signs List 7 elastic member 8 vertical groove 9 horizontal groove 10 absorbent main body 10H rear flap portion 11 rear flap portion fixing material 12 main body fixing material 13 inner groove 13a vertical groove portion 13b horizontal groove portion 14 concave portion F front portion (first region)
M Middle part (first area)
R rear part (second area)
FFL front fold line CFL center fold line RFL rear fold line M1 center slit MS center slit region R1 rear slits RS, RSr, RSl rear slit region CL vertical center line X vertical direction Y horizontal direction

Claims (11)

An intermediate portion having a longitudinal direction corresponding to the front-rear direction of the wearer and a lateral direction orthogonal thereto, and including an excretory portion facing portion facing the excretory portion of the wearer when worn, and extending longitudinally forward from the intermediate portion. An absorbent body, and a pair of leak-proof cuffs arranged on both sides of the absorbent body along the longitudinal direction. An absorbent body comprising a water-absorbing material, a surface sheet disposed on the skin-facing surface side of the absorbent body, and a back surface disposed on the non-skin-facing surface side of the absorbent body An absorbent article comprising a sheet and
Each of the pair of leak-proof cuffs is configured to include a leak-proof cuff sheet, and a base end portion where the leak-proof cuff sheet is fixed to another member; And an upright portion that stands up to
The upright portion extends inward in the horizontal direction from the base end portion, and is configured to include an inner extension portion having elasticity in the vertical direction,
In each of the front portion and the rear portion, an upright inhibition portion in which the inner extending portion is fixed to the topsheet is formed,
At the time of wearing, the upright portion sandwiched between the upright obstruction portions at both ends in the longitudinal direction of the leak-proof cuff has an edge of the inner extension portion as a free end, and the free end is on the skin side of the wearer. In the standing state, the free end is located laterally inward of the base end,
The absorber has a rear slit region in which a rear slit extending in a longitudinal direction is arranged in the rear portion,
The absorbent article, wherein the standing-inhibiting portion of the rear portion is located rearward in a vertical direction from a vertical rear end of the rear slit region.   2. The absorbent article according to claim 1, wherein the rear slit region is provided as a pair on both sides of an imaginary vertical center line extending in the vertical direction by bisecting the absorber horizontally. 3. Vertical grooves extending in the vertical direction are provided at predetermined intervals in the horizontal direction on the skin-facing surface of the absorbent main body as grooves formed by integrally recessing the topsheet and the absorber on the backsheet side. And a pair of horizontal grooves extending in the horizontal direction are connected to the vertical rear ends of the pair of vertical grooves, respectively.
3. The absorbent article according to claim 1, wherein the standing-inhibiting portion of the rear portion overlaps a vertical front end of the horizontal groove or is positioned rearward in the vertical direction. 4. The absorbent body has a rear flap portion including a member extending laterally outward from both side edges along the longitudinal direction of the absorber on both side portions along the longitudinal direction of the rear portion. A non-skin-facing surface of the rear flap portion is provided with a rear flap portion fixing material for fixing the rear flap portion to a wearer's clothes,
The absorptive article according to any one of claims 1 to 3, wherein the standing obstruction portion of the rear portion is located rearward in the vertical direction from the rear flap portion fixing member. Vertical grooves extending in the vertical direction are provided at predetermined intervals in the horizontal direction on the skin-facing surface of the absorbent main body as grooves formed by integrally recessing the topsheet and the absorber on the backsheet side. And a pair of horizontal grooves extending in the horizontal direction are connected to the vertical rear ends of the pair of vertical grooves, respectively.
The pair of vertical grooves each has a constricted portion or a divided portion in the rear portion in plan view,
A plurality of recesses are intermittently arranged in one direction in the longitudinal direction behind the lateral grooves on the skin-facing surface of the absorbent main body, and have a curved portion that is convex outward in the vertical direction in plan view. A row is formed, the interval between adjacent recesses in the recess row is 5 mm or more, and the recess row has a larger radius of curvature than the lateral groove,
The upright obstruction portion of the rear portion includes a virtual straight line extending in the horizontal direction through the narrowed portion or the divided portion of the vertical groove, which is positioned rearmost in the vertical direction, and the vertical direction of the concave portion row. The absorbent article according to any one of claims 1 to 4, wherein the absorbent article is located between a virtual straight line extending laterally through the rear end.   The absorbent article according to claim 5, wherein a body fixing member for fixing the absorbent body to a wearer's clothes is intermittently arranged in a longitudinal direction on a non-skin-facing surface of the absorbent body.   An elastic member is disposed in an edge region of the inner extending portion, and the upright obstructing portion of the rear portion includes a plurality of streak fixing portions obliquely intersecting the elastic member in plan view. The absorbent article according to any one of claims 1 to 6, which is configured.   The vertical length of the free end of the upright portion sandwiched between the upright obstructing portions at both ends in the vertical direction of the leakproof cuff is shorter than the vertical length of the non-erected portion of the leakproof cuff. The absorbent article according to any one of claims 1 to 7.   The absorbent article according to any one of claims 1 to 8, wherein a region in which the basis weight of the water-absorbing material is higher than that of the rear portion exists in the intermediate portion.   The said absorber has the central slit area | region where the central slit extended in the longitudinal direction was arrange | positioned at the said intermediate part, This central slit area | region and the said rear slit area | region are separated in the longitudinal direction. The absorbent article according to any one of the above. The absorbent article according to claim 10, wherein a fold curve used when bending the absorbent body extends in a lateral direction between the central slit region and the rear slit region.

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