TWI495456B - Absorbent article - Google Patents

Description

Absorbent article

The invention relates to absorbent articles such as sanitary napkins, sanitary pads (vaginal secretion pads), incontinence pads and the like.

In order to prevent the menstrual blood from reaching the rear of the wearer's skin during sleep, there is a tendency to leak. In recent years, especially in the sanitary napkin for night use, the length of the physiological sanitary napkin tends to be long.

Further, in order to improve the adhesion between the skin of the wearer and the sanitary napkin to prevent leakage, a method of forming a middle-high portion on the absorbent body is known. For example, JP-A-2006-239162 discloses a sanitary napkin in which a middle-high portion having a width narrower than the width of the absorbent body is provided on the front portion and the rear portion of the absorbent body.

However, since the sanitary napkin for night use has a very long length, the sanitary napkin described in Japanese Patent Laid-Open Publication No. Hei. No. 2006-239162 will be present in the rear part of the wearer's skin and physiology. In the case where a gap is formed between the sanitary napkins, there is a flaw in which menstrual blood leaks from the gap.

The present invention relates to an absorbent article which can effectively prevent menstrual blood from flowing to the rear and body fluids leaking from the rear to obtain excellent leakproofness.

The absorbent article of the present invention comprises: an absorbent body comprising a front sheet on the skin contact side, a back sheet on the non-skin contact side, and an absorbent body interposed between the sheets; and a pair of leakproof walls, It is provided on both sides in the longitudinal direction of the absorbent body and has an elastically stretchable portion. The present invention relates to an absorbent article in which the elastic stretchable portion is fixed to the front end portion of the absorbent body and the front and rear end portions in an extended state, and is in a natural state between the front and rear end portions. The intermediate fixing portion is bent before and after. The absorbent body according to the present invention has a middle-high portion that is raised toward the front sheet side in a central portion in the width direction, and the middle-high portion includes a front middle-high portion and a rear middle-high portion, and the front middle-high portion is formed in the wearer's The excretory area where the body fluid excretion is in contact. In one aspect of the present invention, the intermediate fixing portion is disposed outward in a width direction of a region in which the rear middle portion is disposed.

Hereinafter, a preferred first embodiment of a sanitary napkin as an absorbent article of the present invention will be described with reference to Figs. 1 to 4 .

As shown in Fig. 1, the absorbent article (physiological sanitary napkin) 1A of the first embodiment is formed to be bilaterally symmetrical with respect to a center line CL extending in the longitudinal direction of the sanitary napkin 1A.

As shown in FIG. 1 to FIG. 3, the sanitary napkin 1A of the first embodiment is a vertically long body including an absorbent main body 5 including a front sheet 2 formed on the skin contact surface side and formed on the front side. The back sheet 3 on the non-skin contact surface side and the absorber 4 between the two sheets 2 and 3. As shown in FIG. 1 to FIG. 3, the sanitary napkin 1A is in the longitudinal direction of the absorbent main body 5 (hereinafter referred to as "Y direction". The Y direction is a direction parallel to the center line CL) on both side portions 5c, 5c. A pair of leakage preventing walls 7 and 7 are provided. The pair of leakage preventing walls 7 and 7 have a pair of base wall portions 71 and a planar elastically stretchable portion 72 that is connected to the upper end portion 71a. In the sanitary napkin 1A, the planar elastic stretchable portion 72 is fixed to the front end portions 5b and 5d and the front and rear end portions 5b and 5d of the absorbent body 5 in an extended state, thereby being in a natural state before and after The intermediate fixing portion 7c between the end portions 5b, 5d is bent forward and backward.

In the case of the absorbent article of the side flap portion 31 as in the sanitary napkin 1A of the first embodiment, the term "excretion portion region a" generally refers to the longitudinal direction of the absorbent article (physical sanitary napkin 1A). The area having the side flaps 31 in the (Y direction). The term "excretion portion region a" when the absorbent article having no side flap portion 31 is used refers to a region in which two lines of the line orthogonal to the longitudinal direction (Y direction) of the product are produced when the sanitary napkin is folded into a single package form. In the case of the region where the first fold line and the second fold line which are counted from the front end in the longitudinal direction (Y direction) of the sanitary napkin are the same or narrower. Moreover, when the length of the product of the sanitary napkin is long and three fold lines are generated, the excretion area a refers to the first fold line and the second fold line which are counted from the front end in the longitudinal direction (Y direction) of the product. The formed area or the area where the first broken line which is counted from the front end in the longitudinal direction of the product is the same as or narrower than the area surrounded by the third broken line.

The sanitary napkin 1A of the first embodiment will be described in detail. As shown in Fig. 1, the sanitary napkin 1A includes a front region b before the center portion c and a rear region d after the center portion c. As shown in Fig. 1, the sanitary napkin 1A includes a drain portion region a (a region having the side flap portions 31) that comes into contact with the body fluid discharge portion of the wearer in the front region b.

As shown in FIGS. 1 to 3, the sanitary napkin 1A includes a liquid-permeable front sheet 2, a liquid-impermeable or water-repellent back sheet 3, and an absorbent body 4. The front sheet 2 and the back sheet 3 have larger outer dimensions than the absorbent body 4, respectively. The front sheet 2 and the back sheet 3 extend from both end portions in the longitudinal direction (Y direction) of the absorbent body 4 in the longitudinal direction (Y direction) of the sanitary napkin 1A, and the extension portion is heated by the heat. The front sheet 2 is joined to each other in the longitudinal direction (Y direction) of the absorbent body 4 so as to wrap around the absorbent body 4, and is joined to the back sheet 3 by heat sealing or the like. Thereby forming the absorbent body 5. As shown in FIGS. 1 to 3, the sanitary napkin 1A includes a pair of embossed grooves 8 for fixing the front sheet 2 and the absorbent body 4. As shown in FIG. 1, the side flaps 31 of the sanitary napkin 1A are provided in a pair on both sides in the longitudinal direction (Y direction) of the sanitary napkin 1A. The side flap portion 31 is formed by extending the back sheet 3, and an adhesive portion (not shown) for fixing the side flap portion 31 to the non-skin contact surface of the crotch portion is provided on the back surface.

As shown in FIGS. 1 to 3, the sanitary napkin 1A includes leakage preventing walls (wrinkles) 7 on both side portions 5c and 5c in the longitudinal direction (Y direction) of the absorbent main body 5. The leakage preventing wall (wrinkle) 7 of the sanitary napkin 1A is a so-called T-shaped leakage preventing wall (wrinkle), as shown in Figs. 1 and 2, in the longitudinal direction (Y direction) of the absorbent body 5. The both side portions 5c and 5c include a pair of upright base wall portions 71 and a planar elastically stretchable portion 72 that are respectively connected to the upper end portions 71a. Here, "standing" means that the upper end portion 71a of the leakage preventing wall 7 is located above the surface of the front sheet 2. In the following description, the leakage preventing wall 7 on the right side shown in Fig. 1 will be mainly described.

As shown in FIG. 2, the T-shaped leakage preventing wall 7 is formed by processing a piece of the strip-shaped sheet 6 into a sleeve shape and a T-shape. The belt-shaped stretch sheet 6 is disposed and fixed to the side portion 5c in the longitudinal direction (CL line direction) of the absorbent body 5 in the longitudinal direction, and is formed to stand upright on the skin contact surface by contraction of the stretch sheet 6 Side T-shaped leak-proof wall 7. The T-shaped leakage preventing wall 7 includes a base wall portion 71 including an upper end portion 71a and a fixed end portion 71b in a free state.

As shown in Fig. 1, the strip-shaped sheet 6 is in the longitudinal direction (Y direction) of the front region b of the sanitary napkin 1A, and the longitudinal direction (Y direction) of the rear region d, and the front portion, and the front surface. Similarly, the sheet 2 and the back sheet 3 extend from both end portions in the longitudinal direction (Y direction) of the absorber 4, and the extending portions are joined and fixed by heat sealing, hot melt, or the like. The portion to which the joint is fixed is the front end portion 7b in the longitudinal direction (Y direction) of the leakage preventing wall 7, and the rear end portion 7d in the longitudinal direction (Y direction). The leakage preventing wall 7 includes an intermediate fixing portion 7c fixed to the front sheet 2. The intermediate fixing portion 7c of the leakage preventing wall 7 is disposed between the front end portion 7b and the rear end portion 7d.

As shown in FIGS. 1 and 2, the T-shaped leakage preventing wall 7 includes a planar elastically stretchable portion 72 that projects from the upper end portion 71a in a substantially horizontal direction. In the wearing state of the sanitary napkin 1A, the upper surface of the elastically stretchable portion 72 is in contact with the skin of the wearer. The planar elastic stretchable portion 72 is fixed to the front end portions 5b and 5d and the front and rear end portions 5b and 5d of the absorbent body 5 in an extended state. By fixing the elastically stretchable portion 72 in such a manner, the sanitary napkin 1A is bent in the natural state before the intermediate fixing portion 7c between the front and rear end portions 5b, 5d. As shown in Fig. 2, the width direction of the elastically stretchable portion 72 (hereinafter referred to as "X direction". The X direction: the direction perpendicular to the center line CL) is inside and outside, and includes the same amount of protrusion to the physiological direction. The inner projecting portion 721 and the outer projecting portion 722 projecting from the inner side and the outer side in the width direction (X direction) of the sanitary napkin 1A, respectively. The inner projecting portion 721 and the outer projecting portion 722 of the elastically stretchable portion 72 are so-called free ends, and extend over substantially the entire length (Y direction) of the sanitary napkin 1A. As shown in Fig. 1, the elastically stretchable portion 72 of the leakage preventing wall 7 of the first embodiment includes a front elastic expansion portion 72b and a middle fastening portion 7c in the longitudinal direction (Y direction) of the intermediate fixing portion 7c. The elastically stretchable portion 72d is further rearward in the longitudinal direction (Y direction).

As shown in Fig. 3, in the intermediate fixing portion 7c of the leakage preventing wall 7 in the first embodiment, the inner protruding portion 721 of the planar elastically stretchable portion 72 is indirectly fixed to the front side via the folded base portion 71. On sheet 2. As shown in FIG. 3, the leakage preventing wall 7 includes an outer protruding portion 722 that protrudes outward in the width direction (X direction) of the elastically stretchable portion 72 in a state of a free end in the intermediate fixing portion 7c.

As shown in FIG. 2, the inner protruding portion 721 and the outer protruding portion 722 of the elastically stretchable portion 72 respectively extend a plurality of linear elastic members 63 extending in the longitudinal direction (Y direction) of the leakage preventing wall 7 to elongate. The state is arranged at intervals in the width direction (X direction) to impart stretchability to the sheet 6. The plurality of elastic members 63 disposed on both the inner protruding portion 721 and the outer protruding portion 722 are preferably in the single leakage preventing wall 7, and the inner protruding portion 721 and the outer protruding portion 722 are combined. It is 2 to 10 roots. Since the elastic member 63 is not disposed behind the front region b and the rear region d, the strip-shaped sheet 6 does not have stretchability. The leakage preventing wall 7 is not erected in a region where the sheet 6 does not have stretchability or in a region where the elastic member 63 is disposed in an unstretched state.

As shown in FIG. 3, the leakage preventing wall 7 of the first embodiment is disposed in the intermediate fixing portion 7c, and the plurality of elastic members 63 disposed in the width direction (X direction) of the elastically stretchable portion 72 are arranged in an extended state. However, since the inner protruding portion 721 of the elastic stretchable portion 72 at the intermediate fixing portion 7c is fixed to the front sheet 2, the width direction (X direction) of the intermediate fixing portion 7c of the leakage preventing wall 7 is not Erected. However, as shown in Fig. 3, the leakage preventing wall 7 of the first embodiment also has an outer protruding portion 722 which is a free end in the intermediate fixing portion 7c, and a portion of the outer protruding portion 722 at the intermediate fixing portion 7c. Scales in the length direction (Y direction). Therefore, the outer projecting portion 722 is formed to be inclined so as to gradually rise outward in the width direction (X direction).

As shown in Fig. 2, the fixed end portion 71b of the T-shaped leakage preventing wall 7 is disposed at a position spaced apart from the side edge of the absorbent body 5 by a certain distance. Specifically, the fixed end portion 71b of the T-shaped leakage preventing wall 7 is disposed between the front sheet 2 and the back sheet 3 which extend to the non-skin contact surface side of the absorbent body 4, and is heat sealed or It is joined by a subsequent agent or the like. Further, in the sanitary napkin 1A, it is joined by an adhesive.

As shown in FIGS. 1 to 3, the absorbent body 4 of the sanitary napkin 1A includes an absorbent body 43 disposed on the back sheet 3 and extending over the front region b to the rear region d, and the lower layer of the absorbent body 5. The middle-high portion 40 in which the front sheet 2 side of the central portion (CT) of the width direction (X direction) of the absorber 43 is raised is formed, and the middle-high portion 40 is formed by the front middle-high portion 41 and the rear middle-high portion 42 which are separately provided. As shown in FIG. 1, the front middle portion 41 is formed in the drain portion region a. Specifically, as shown in FIG. 2 and FIG. 3, the absorbent body 4 is on the upper surface of the lower absorbent body 43 and on the skin contact surface side of the lower absorbent body 43 in the excretion area a of the sanitary napkin 1A and the rear area d. The front middle height portion 41 and the rear middle height portion 42 having a width narrower than the lower layer absorber 43 and convex on the side of the front sheet 2 are included.

The front middle portion 41 is formed to have a narrower width than the lower layer absorber 43 and longer in the longitudinal direction (Y direction), and is formed in the central portion in the width direction (X direction) of the lower layer absorber 43 as shown in FIGS. 1 and 2 ( The CT) is formed to extend between the front and rear ends of the side flap portion 31 in the longitudinal direction (Y direction). The front middle portion 41 is in the longitudinal direction (Y direction) of the front middle and high portion 41, and the front end portion 41a and the rear end portion 41b are both in the longitudinal direction (Y direction) of the sanitary napkin 1A. The square becomes convex. The length of the front middle-high portion 41 in the width direction (X direction) of the front end portion 41a is substantially the same as the length of the front middle-high portion 41 in the width direction (X direction) of the rear end portion 41b, and the rear middle portion 41 is the rear end portion. The curved radius of the convex shape of 41b is formed to be substantially the same as the curved radius of the convex shape of the front end portion 41a of the front middle and high portion 41. As shown in FIG. 1, the front middle portion 41 is surrounded by an outer groove 81 and an intermediate groove 82 which will be described later.

In the front middle portion 41 of the first embodiment, as shown in FIG. 1, the rear end portion 41b is formed further in the longitudinal direction (Y direction) of the intermediate fixing portions 7c and 7c of the pair of leakage preventing walls 7. As shown in Fig. 1, the front middle portion 41a of the first embodiment is formed between the front end portions 7b and 7b of the pair of leakage preventing walls 7 in the longitudinal direction (Y direction) rear end.

The rear middle portion 42 is formed to have a width narrower than the lower layer absorber 43 and longer in the longitudinal direction (Y direction), and is formed in the center in the width direction (X direction) of the lower layer absorber 43 as shown in FIGS. 1 and 3 . The region (CT) is longer than the intermediate groove 82 in the longitudinal direction (Y direction) of the sanitary napkin 1A. In the plan view of the rear middle-high portion 42 in the sanitary napkin 1A, as shown in FIG. 1, the rear end portion 42b (the end portion away from the intermediate groove 82) of the rear middle-high portion 42 is formed so that the front end is earlier than the rear middle-high portion 42. The end 42a has a finer shape. Specifically, as shown in FIG. 1 , the front end portion 42 a and the rear end portion 42 b in the longitudinal direction (Y direction) of the rear middle portion 42 are convex toward the longitudinal direction (Y direction) of the sanitary napkin 1A. And the curved radius of the convex shape of the rear end portion 42b of the rear middle portion 42b after the intermediate groove 82 is formed to be smaller than the curved radius of the convex shape of the front end portion 42a of the lower middle portion 42 of the intermediate groove 82. The rear middle portion 42 is formed such that the width gradually decreases toward the rear end portion 42b. As shown in FIG. 1, the rear middle portion 42 is surrounded by a pair of rear intermediate grooves 83 and an intermediate groove 82 which will be described later.

As shown in FIG. 1, the rear middle height portion 42 extends between the intermediate fixing portions 7c, 7c of the pair of leakage preventing walls 7. In other words, the intermediate fixing portions 7c and 7c of the pair of leakage preventing walls 7 are disposed outward in the width direction (X direction) of the region in which the rear middle height portion 42 is disposed. In this manner, the rear middle portion 42 is formed to extend in the longitudinal direction (Y direction) in the front-rear direction so as to intersect the imaginary line connecting the intermediate fixing portions 7c and 7c of the pair of leakage preventing walls 7 . In the rear middle portion 42 of the first embodiment, as shown in FIG. 1, the rear end portion 42b is formed further forward than the end portion 7d after the pair of leakage preventing walls 7 and the elastically stretchable portion 72d. In this manner, the rear end portion 42b of the rear middle portion 42 is formed between the pair of leakage preventing walls 7 and the elastically stretchable portion 72d.

As shown in FIGS. 1 to 3, the sanitary napkin 1A includes a pair of embossed grooves 8 for fixing the front sheet 2 and the absorbent body 4. The embossed grooves 8 extend along both side portions 5c, 5c of the absorbent body 5. The portions in which the embossed grooves 8 are formed deeper and which are formed slightly shallower than the shallow portions are alternately arranged to form a continuous line. As shown in Fig. 1, the embossed groove 8 of the first embodiment includes an outer groove 81 which is disposed along the outer circumference of the front middle portion 41 and which is formed by compacting the front sheet 2 and the absorber 4. Further, as shown in FIG. 1, the embossed groove 8 of the first embodiment includes an intermediate groove 82 formed by compacting the front sheet 2 and the absorber 4 between the front middle portion 41 and the rear middle portion 42. . Further, as shown in FIG. 1, the embossed groove 8 of the first embodiment is formed by pressing the front sheet 2 and the absorber 4 at the rear end portion 42b of the rear middle portion 42 to form the rear intermediate groove 83. Further, as shown in Fig. 1, the embossed grooves 8 of the first embodiment include the front sheet 2 and the absorber 4 between the pair of leakage preventing walls 7 and 7 behind the end portions 7d and 7d. The last intermediate groove 84 is formed. The embossed groove 8 is provided in a line symmetry with respect to a center line (CL line) extending in the longitudinal direction of the sanitary napkin 1A, and is formed in the excretory area in the sanitary napkin 1A of the first embodiment. The outer groove 81 is connected to the last intermediate groove 84 between the rear end portions 7d and 7d of the pair of leakage preventing walls 7, 7 to form an annular full circumferential groove.

As shown in Fig. 1, the intermediate groove 82 of the embossed groove 8 in the first embodiment is disposed in the center portion c in the longitudinal direction (Y direction) of the sanitary napkin 1A, and is in the width direction (X direction). Extended to form. As shown in FIG. 1, the intermediate groove 82 is formed in a convex shape toward the rear middle height portion 42. The curved radius of the convex shape of the intermediate groove 82 is formed to be substantially the same as the curved radius of the convex shape of the rear end portion 41b of the front middle and high portion 41, or larger than the curved radius of the convex shape of the rear end portion 41b. As shown in Fig. 1, the intermediate groove 82 in the first embodiment is not connected to the outer groove 81, but may be connected.

As shown in Fig. 1, the rear intermediate groove 83 of the embossed groove 8 in the first embodiment is formed along the rear end portion 42b of the rear middle portion 42 and is along the longitudinal direction of the rear middle portion 42 (Y direction). ) formed on both side portions 42c and 42c. As shown in FIG. 1, the rear intermediate groove 83 is formed in a convex shape in the longitudinal direction (Y direction) of the sanitary napkin 1A. The curved radius of the convex shape of the rear intermediate groove 83 is formed to be substantially the same as the curved radius of the convex shape of the rear end portion 42b of the rear middle-high portion 42. As shown in Fig. 1, the rear intermediate groove 83 in the first embodiment is connected to the other embossed grooves 8, but may not be connected.

As shown in Fig. 1, the last intermediate groove 84 of the embossed groove 8 in the first embodiment has a convex shape in the longitudinal direction and is formed on both sides in the longitudinal direction (Y direction) of the absorbent body 5. The portions 5c and 5c are formed. The curved radius of the convex shape of the last intermediate groove 84 in the first embodiment is formed to be larger than the curved radius of the convex shape of the intermediate groove 82 and smaller than the curved radius of the convex shape of the rear intermediate groove 83. The widths of the outer groove 81, the intermediate groove 82, the rear intermediate groove 83, and the rear intermediate groove 84 are respectively 15 mm to 200 mm, preferably 20 mm to 150 mm. The groove widths of the outer groove 81, the intermediate groove 82, the rear intermediate groove 83, and the rear intermediate groove 84 are respectively 1.5 mm to 6 mm.

As shown in Fig. 1, in the first embodiment, the intermediate fixing portions 7c and 7c of the leakage preventing walls 7 and 7 are formed rearward of the intermediate groove 82 of the embossed groove 8 in the longitudinal direction (Y direction). The location. Thus, the intermediate groove 82 is formed between the elastically stretchable portions 72b before the pair of leakage preventing walls 7. As shown in Fig. 1, in the first embodiment, the rear end portions 7d and 7d of the leakage preventing walls 7 and 7 are respectively extended beyond the embossed grooves 8, and the intermediate grooves 83 are further in the longitudinal direction (Y direction). The rear position is fixed to the front sheet 2. In this manner, the rear intermediate groove 83 is formed between the pair of leakage preventing walls 7 and the elastically stretchable portion 72d.

In the physiological sanitary napkin 1A of the first embodiment, the rear region d of the absorbent main body 5 is formed to extend to the tailbone of the wearer, and the back sheet 3 is self-absorbent body 5 in the rear region d as shown in Fig. 1 . Both side edges in the longitudinal direction extend greatly in the width direction (X direction), and form the rear wing 32 which is adhered to the inner surface (skin facing surface) of the undergarment such as a shorts when worn.

The material for forming the sanitary napkin 1A of the first embodiment will be described.

The surface sheet 2, the back sheet 3, and the absorber 4 under the absorber 4 are generally used for an absorbent article such as a sanitary napkin, and are not particularly limited. For example, as the front sheet 2, a liquid-permeable non-woven fabric, an apertured film, a laminate or the like can be used, and as the back surface sheet 3, a resin film or a laminate of a resin film and a nonwoven fabric can be used. As the lower layer absorber 43, a fiber assembly of a fiber material such as pulp or a superabsorbent polymer supported thereon may be used, and a coating material such as a toilet paper or a water-permeable nonwoven fabric may be used for wrapping.

Examples of the front middle-high portion 41 and the rear middle-high portion 42 include natural fibers such as pulp or cotton, synthetic fibers other than natural fibers, and fibers which are mixed therewith. From the viewpoint of absorbability, it is preferred to contain pulp. Fiber. From the standpoint of conformability, it is preferred to contain synthetic fibers. Here, the synthetic fiber includes, in particular, various composite fibers such as a monofilament fiber or a core-sheath structure fiber formed of a resin such as polyethylene, polypropylene, polyester or polylactic acid, or a semi-synthetic fiber such as ruthenium.

The sheet 6 on which the leakage preventing wall 7 is formed may, for example, be a film, a nonwoven fabric, a woven fabric or the like, or a laminated sheet thereof, and preferably has a stretchability partially or entirely. Specific examples include polyethylene-α including natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, and ethyl acrylate-ethylene. - a material such as an olefin copolymer or the like which has a stretchable material (film, thread, nonwoven fabric, fabric), or such a stretchable material (elastic member 63) and comprising polyethylene/polyester, polyethylene/polypropylene A composite sheet such as a thermoplastic nonwoven fabric of polypropylene. Examples of the shape of the linear elastic member 63 include a linear shape (such as a rubber thread) or a belt shape (a flat rubber strip) such as a rectangular shape, a square shape, a circular shape, and a polygonal shape, or a linear shape of a multifilament type. And so on.

The processing method of forming the embossed grooves 8 such as the outer groove 81, the intermediate groove 82, the rear intermediate groove 83, and the rear intermediate groove 84 may be exemplified by embossing, hot embossing, ultrasonic embossing, And processing methods such as combining them.

Hereinafter, the action and effect when the sanitary napkin 1A of the embodiment of the present invention is used will be described.

The sanitary napkin 1A of the first embodiment can have two curved shapes between the intermediate fixing portion 7c and the front end portion 7b and between the intermediate fixing portion 7c and the rear end portion 7d by providing the intermediate fixing portion 7c. . In the case of the present invention, the middle-high portion 40 is divided into the front middle-high portion 41 and the rear middle-high portion 42, and the rigidity between the front-rear middle-high portions 41, 42 is weaker than the front-rear middle-high portions 41, 42. Therefore, when the sanitary napkin 1A is bent in the front-rear direction, the front and rear middle and high portions 41 and 42 having a relatively low rigidity compared with the front and rear middle and high portions 41 and 42 are easily bent. Here, it is considered that if the contraction force of the elastic member 63 of the leakage preventing wall 7 is increased, there is also a case where the bending is generated, but the intermediate fixing portion 7c is formed in the region where the rear middle portion 42 is located, instead of being formed before and after The region between the middle and high portions 41 and 42 can obtain a curved shape without bending between the front and rear middle and high portions 41 and 42 and can be obtained in front of the intermediate fixing portion 7c and the intermediate fixing portion 7c. Two curved shapes of the shape of the wearing part. In particular, when the area between the front and rear middle and high portions 41, 42 is worn on the hip line of the buttocks near the tailbone of the wearer, the item is sharply bent to abut the body, thereby also producing in the area. The gap is formed to be folded, and it is not in good contact with the body, resulting in leakage of liquid from the portion. However, the sanitary napkin 1A can be bent without bending.

In the sanitary napkin 1A of the first embodiment, as shown in FIGS. 1 to 3, the absorber 4 includes a high portion 40 including a front middle high portion 41 and a rear middle high portion 42. As shown in FIG. 1, the rear middle height portion 42 extends between the intermediate fixing portions 7c, 7c of the pair of leakage preventing walls 7. Therefore, as shown in FIG. 4, the sanitary napkin 1A of the first embodiment is easily bent inward by the contraction of the pair of leakage preventing walls 7, and the menstrual blood of the wearer can be prevented from moving in the longitudinal direction ( The Y direction is downstream, which can effectively prevent body fluid from leaking from the rear. As described above, the sanitary napkin 1A of the first embodiment can provide excellent leakproofness.

In the sanitary napkin 1A of the first embodiment, the front end portion 41b of the front middle and high portion 41 is formed in the longitudinal direction (Y direction) of the intermediate fixing portions 7c and 7c of the pair of leakage preventing walls 7 as shown in Fig. 1 . ) More forward. In this manner, since the front end portion 41b of the front middle and high portion 41 is located between the elastically stretchable portions 72b and 72b before the pair of leakage preventing walls 7, the portion of the absorber 4 in which the front middle portion 41 is disposed and not disposed The difference in rigidity between the portions and the contraction force of the elastic expansion-contraction portion 72b in the front side of the pair of leakage preventing walls 7 tend to be bent inward from the rear end portion 41b of the front middle-high portion 41. Similarly, the rear end portion 42b of the rear middle height portion 42 is formed to be located further forward than the rear end portion 7d of the pair of leakage preventing walls 7, and the rear end portion 42b of the rear middle portion 42 is formed to be located in a pair of leakproof portions. Between the rear elastically stretchable portions 72d of the wall 7. Therefore, the difference between the portion of the absorber 4 in which the rear middle portion 42 is disposed and the undisposed portion, and the contraction force of the rear elastic stretch portion 72d of the pair of leakage preventing walls 7 are facilitated from the rear middle portion 42. Then, the square end portion 42b starts to be bent toward the inner side. Therefore, it is possible to further prevent the percutaneous blood of the wearer from flowing backward in the longitudinal direction (Y direction), thereby more effectively preventing the body fluid from leaking from the rear.

Further, in the sanitary napkin 1A of the first embodiment, as shown in Fig. 1, the intermediate fixing portions 7c and 7c of the pair of leakage preventing walls 7 and 7 are formed in the intermediate groove 82 of the embossed groove 8, respectively. The position in the direction (Y direction) is further rearward. Thus, the intermediate groove 82 is formed between the elastically stretchable portions 72b before the pair of leakage preventing walls 7. Therefore, as shown in FIG. 4, the sanitary napkin 1A of the first embodiment is easily bent inward by the intermediate groove 82 as a flexible shaft. Similarly, as shown in FIG. 1, the rear end portions 7d, 7d of the pair of leakage preventing walls 7, 7 are respectively extended beyond the embossed grooves 8, and the intermediate grooves 83 are further rearward in the longitudinal direction (Y direction). The location. In this manner, the rear intermediate groove 83 is formed between the pair of leakage preventing walls 7 and the elastically stretchable portion 72d. Therefore, as shown in FIG. 4, the sanitary napkin 1A of the first embodiment is easily bent inward by the rear intermediate groove 83 as a flexible shaft. Therefore, it is possible to further prevent the menstrual blood of the wearer from flowing backward in the longitudinal direction (Y direction), thereby more effectively preventing the body fluid from leaking from the rear.

Moreover, as shown in FIG. 1, the sanitary napkin 1A of the first embodiment includes a rearmost intermediate groove 84 which is convex in a square shape in the longitudinal direction. Therefore, it is possible to more effectively prevent the body fluid from leaking from the rear.

In the intermediate fixing portion 7c, the leakage preventing wall 7 of the sanitary napkin 1A of the first embodiment is gradually erected outward in the width direction (X direction) of the intermediate fixing portion 7c. The way is formed by tilting. Therefore, it is possible to effectively prevent the body fluid from leaking in the width direction (X direction) at the intermediate fixing portion 7c, and the sanitary napkin 1A of the first embodiment can obtain excellent leakproofness.

In the sanitary napkin 1A of the first embodiment, as shown in FIG. 1, the rear end portion 42b of the rear middle portion 42 has a tapered shape. By forming the rear middle-high portion 42 in this manner, the rear middle-high portion 42 is easily fitted into the groin of the wearer's buttocks, thereby preventing menstrual blood from flowing backward.

The absorbent article of the present invention is not limited to any of the sanitary napkins of the first embodiment, and can be appropriately changed.

For example, in the sanitary napkin 1A of the first embodiment, as shown in FIG. 1, the middle-high portion 40 is formed by two middle and high portions of the front middle-high portion 41 and the rear middle-high portion 42, but it may be more than two. The middle and high parts are formed.

Further, in the sanitary napkin 1A of the first embodiment, as shown in Fig. 3, the inner protruding portion 721 of the planar elastic stretchable portion 72 is attached to the intermediate fixing portion 7c, and the folded base portion 71 is interposed therebetween. It is fixed to the front sheet 2 indirectly, but may be directly fixed to the front sheet 2.

Further, in the sanitary napkin 1A of the first embodiment, as shown in Fig. 1, the rear end portion 42b of the rear middle portion 42 is formed further forward than the end portion 7d of the pair of leakage preventing walls 7, but Can not be located in front.

Further, as shown in Fig. 1, the sanitary napkin 1A of the first embodiment includes an embossed groove 8 including an outer groove 81 disposed along the outer circumference of the front middle portion 41. An intermediate groove 82 formed between the front middle height portion 41 and the rear middle height portion 42 and a rearmost intermediate groove 84 formed between the rear end portions 7d, 7d of the pair of leakage preventing walls 7, 7. The radius of curvature of the front end portion of the rear intermediate groove 84 is larger than one half of the maximum width of the rear middle portion 42 , whereby a pair of leakage preventing walls 7 due to the contraction force of the elastic member 63 of the leakage preventing wall 7 can be suppressed. After 7, the absorber between the end portions 7d and 7d is deformed, so that the conformability of the absorbent article is easily stabilized.

Further, in the sanitary napkin 1A of the first embodiment, as shown in Fig. 1, the outer protruding portion 722 of the intermediate fixing portion 7c of the leakage preventing wall 7 is gradually outward in the width direction (X direction). Although it is inclined by the erecting method, it may not be inclined, and may be fixed over the entire area in the width direction (X direction) of the intermediate fixing portion 7c.

In the sanitary napkin 1A of the first embodiment, as shown in FIG. 1, the rear end portion 42b of the rear middle portion 42 is formed to have a tapered shape from the front end portion 42a of the rear middle portion 42. However, it is not limited to the shape in which the front end is tapered. The planar shape of the front middle portion 41 is not limited to the above shape.

5 and 6 are plan views showing the second embodiment and the third embodiment of the present invention, which are the same as the sanitary napkin 1A of the first embodiment except that the foremost intermediate groove 80 is formed. In the sanitary napkin 1B of the second embodiment shown in Fig. 5, the foremost intermediate groove 80 is the same as the last intermediate groove 84, and the radius of curvature of the front end portion is in front of the pair of leakage preventing walls 7, 7. The end portions 7b, 7b are larger than half the width of the maximum width of the front middle portion 41. In the sanitary napkin 1C of the third embodiment shown in FIG. 6, the imaginary line IL connected to the front side of the pair of leakage preventing walls 7 and 7 is connected to the foremost intermediate groove 80. The foremost intermediate groove 80 is formed such that the angle TL formed at the position and the angle α formed by the center line CL extending in the longitudinal direction are 45 or less. The sanitary napkin 1C of the third embodiment can prevent the contraction force of the elastic member 63 of the leakage preventing wall 7 from causing the front side of the pair of leakage preventing walls 7, 7 by forming the foremost intermediate groove 80 in this manner. The absorbent body 4 between the end portions 7b, 7b is deformed, thereby improving the conformability of the sanitary napkin 1C.

Hereinafter, a preferred fourth embodiment of the sanitary napkin as the absorbent article of the present invention will be described based on Fig. 7 .

The difference between the sanitary napkin 1D of the fourth embodiment and the sanitary napkin 1A of the first embodiment will be described. In the same manner as the sanitary napkin 1A of the first embodiment, the description of the sanitary napkin 1A of the first embodiment can be suitably used.

In the sanitary napkin 1D of the fourth embodiment, the leakage preventing wall 7 is not a T-shaped leakage preventing wall 7 as shown in the sanitary napkin 1A of the first embodiment, but is a ring-shaped leakage preventing wall. 7. This aspect is largely different from the sanitary napkin 1A of the first embodiment. Hereinafter, the annular leakage preventing wall 7 of the sanitary napkin 1D of the fourth embodiment will be described.

In one of the sanitary napkins 1D of the fourth embodiment, as shown in Fig. 7, the strip-shaped stretchable sheet 6 is joined to one side portion 6a and the other side portion 6b in the longitudinal direction. The absorbent body 5 is formed in a hollow annular shape and is erected in the drain portion region a. In the sanitary napkin 1D of the fourth embodiment, the strip-shaped stretchable sheet 6 is disposed in the longitudinal direction (Y direction) and joined to each side portion 5a in the longitudinal direction (Y direction) of the absorbent body 5. By the contraction of the stretchable sheet 6, a hollow annular leak preventing wall 7 which is convexly erected toward the skin contact surface side is formed.

In the sanitary napkin 1D of the fourth embodiment, the stretchable sheet 6 is a composite sheet that is stretched by the elastic member 63. As shown in FIG. 7, the stretchable sheet 6 is formed by arranging a sheet 61 on the skin contact surface side, a sheet 62 on the non-skin contact surface side, and a plurality of elastic members 63 disposed between the sheets 61 and 62. The sheet 61 on the skin contact surface side and the sheet 62 on the non-skin contact surface side are strip-shaped (rectangular) sheets having the same shape and the same size, and the stretchable sheet 6 is attached to the sheet 61 on the skin contact surface side. Between the sheets 62 on the non-skin contact surface side, the linear elastic members 63 are disposed in the longitudinal direction (Y direction) of the sheets 61 and 62, and the plurality of elastic members 63 are uniformly disposed on the strip-shaped sheets. 61, 62 are formed in the width direction (X direction). Each of the plurality of elastic members 63 may be disposed across both end portions of the longitudinal direction (Y direction) of the absorbent body 5, but may be disposed at least longer than the excretory portion region a that is in contact with the body fluid discharge portion of the wearer.

As shown in FIG. 7, the stretchable sheet 6 is a surface of the sheet 62 on the non-skin contact surface side of one side portion 6a of the stretchable sheet 6 in the longitudinal direction (Y direction) to sandwich the front sheet 2 and absorb The body 4 is joined to the surface of the skin contacting surface side of the front sheet 2 constituting the absorbent body 5 to form a joint portion 9. Further, in the fourth embodiment, the other side portion 6b in the longitudinal direction of the stretchable sheet 6 is disposed on the non-skin contact surface side of the absorbent body 5, that is, disposed on the absorbent body 4 as shown in FIG. The surface of the sheet 61 on the skin contact surface side of the other side portion 6b is joined to the surface of the back sheet 3 between the back sheets 3 to form a joint portion 9D. In this manner, the strip-shaped stretchable sheet 6 is disposed in the longitudinal direction (Y direction) and joined to the side portion 5a in the longitudinal direction (Y direction) of the absorbent body 5, and the stretchable sheet 6 is shrunk. The leakage preventing wall 7 having a portion which is erected in a hollow ring shape is formed. Bonding can be performed by heat sealing or an adhesive or the like. In the fourth embodiment, the joint portion 9 is formed by an adhesive, and the sheet 62 on the non-skin contact surface side of the stretchable sheet 6 is joined to the absorbent body 4, and the skin contact surface side of the stretchable sheet 6 is formed. The joining of the sheet 61 and the back sheet 3 (joining portion 9D) and the joining of the front sheet 2 and the absorber 4 are also performed by an adhesive. Moreover, in the fourth embodiment, the joining of the stretchable sheets 6 of Fig. 7 on the skin contact surface side is performed by heat sealing.

As shown in FIG. 7, the leakage preventing wall 7 has a longitudinal cross-sectional shape including a top portion 73 of the leakage preventing wall 7 and a joint portion 9 in the drain portion region a of the leakage preventing wall 7 as one side, and one side at the joint portion 9 The inner surface of the ring is folded back and the shape of the ring is folded back to form a numeral "2". In other words, the joint portion 9 is such that the inner surface of the ring of the leakage preventing wall 7 is joined toward the front sheet 2, and the sanitary napkin 1D is viewed from the top, and the joint portion 9 in the drain portion region a of the leakage preventing wall 7 is prevented from leaking. The shape of the wall 7 is covered.

Here, the shape of the "2" shape indicates that the buckling portion of the numeral "2" (the buckling portion 74 on the skin contact surface side and the flexure portion 75 on the non-skin contact surface side) are not actively folded, but In the fourth embodiment, it is preferable that the flexure portion 74 on the skin contact surface side is in a state of being largely deflected as compared with the flexure portion 75 on the non-skin contact surface side. It is preferable that the elastic member 63 is disposed at each of the front end portions of the flexure portion 74 on the skin contact surface side and the flexure portion 75 on the non-skin contact surface side.

The action and effect when the sanitary napkin 1D of the fourth embodiment of the present invention is used will be described.

The physiological sanitary napkin 1D of the fourth embodiment can obtain the same effects as the sanitary napkin 1A of the first embodiment.

Hereinafter, a preferred fifth embodiment of the sanitary napkin as the absorbent article of the present invention will be described based on Fig. 8 .

The difference between the sanitary napkin 1E of the fifth embodiment and the sanitary napkin 1A of the first embodiment or the sanitary napkin 1D of the fourth embodiment will be described. In the same manner as the physiological sanitary napkin 1A of the first embodiment or the sanitary napkin 1D of the fourth embodiment, the physiological sanitary napkin 1A of the first embodiment or the physiological embodiment of the fourth embodiment can be used as appropriate. Description of sanitary cotton 1D.

In the sanitary napkin 1E of the fifth embodiment, the ring shape of the leakage preventing wall 7 is different from the ring shape of the leakage preventing wall 7 of the sanitary napkin 1D of the fourth embodiment. Hereinafter, the annular leakage preventing wall 7 of the sanitary napkin 1E of the fifth embodiment will be described.

The sanitary napkin 1E of the fifth embodiment includes the joint portions 9 and 9D. As shown in Fig. 8, the joint portion 9 of the leakage preventing wall 7 that is annularly erected in the drain portion region a is formed by stretching the stretchable sheet. One side portion 6a of the material 6 in the longitudinal direction (Y direction) is formed by being joined to the non-skin contact surface of the side portion 5a of the longitudinal direction (Y direction) of the front sheet 2 of the absorbent body 5. The joint portion 9D of the leakage preventing wall 7 that is annularly erected in the drain portion region a is joined to the side of the longitudinal direction (Y direction) of the absorbent body 5 by joining the other side portion 6b of the stretchable sheet 6 The portion 5a is formed on the non-skin contact surface side.

As shown in Fig. 8, the sanitary napkin 1E of the fifth embodiment has a joint portion 9 of the side portion 6a of the stretchable sheet 6 such that the outer surface of the loop of the leak preventing wall 7 (the sheet 61 on the skin contact surface side) The joining is performed toward the front sheet 2, whereby the hollow leakage preventing wall 7 is formed.

As shown in Fig. 8, the stretchable sheet 6 of the sanitary napkin 1E of the fifth embodiment is held by the surface of the sheet 61 on the skin contact surface side of the one side portion 6a in the longitudinal direction of the stretchable sheet 6. The absorbent body 4 is joined to the surface of the non-skin contact surface side of the front sheet 2 constituting the absorbent body 5 to form the joint portion 9. Moreover, the surface of the sheet 62 on the non-skin contact surface side of the side portion 6a of one of the stretchable sheets 6 is joined to the surface of the skin contacting surface side of the absorbent body 4. Further, as shown in Fig. 8, the other side portion 6b in the longitudinal direction of the stretchable sheet 6 is disposed between the absorbent body 4 and the back sheet 3, and the sheet 61 on the skin contact surface side of the other side portion 6b. The surface is bonded to the surface of the back sheet 3 to form a joint portion 9D. In this manner, the strip-shaped stretchable sheet 6 is disposed in the longitudinal direction (Y direction) and joined to the side portion 5a in the longitudinal direction (Y direction) of the absorbent body 5, and the stretchable sheet 6 is shrunk. A leakage preventing wall 7 is formed which is erected in a hollow ring shape.

The effect of the use of the sanitary napkin 1E of the fifth embodiment of the present invention described above will be described.

The sanitary napkin 1E of the fifth embodiment can obtain the same effects as the sanitary napkin 1A of the first embodiment.

Hereinafter, a preferred sixth embodiment of the sanitary napkin as the absorbent article of the present invention will be described based on Fig. 9 .

The difference between the sanitary napkin 1F of the sixth embodiment and the sanitary napkin 1A of the first embodiment or the sanitary napkin 1D of the fourth embodiment will be described. In the same manner as the physiological sanitary napkin 1A of the first embodiment or the sanitary napkin 1D of the fourth embodiment, the physiological sanitary napkin 1A of the first embodiment or the physiological embodiment of the fourth embodiment can be used as appropriate. Description of sanitary cotton 1D.

In the sanitary napkin 1F of the sixth embodiment, the annular shape of the leakage preventing wall 7 is different from the annular shape of the leakage preventing wall 7 of the sanitary napkin 1D of the fourth embodiment. In the sanitary napkin 1F of the sixth embodiment, the side flap portion 31 is different from the side flap portion 31 of the sanitary napkin 1A of the first embodiment only in the form in which the back sheet 3 is extended. The side portion of the sheet 3 has a side portion forming substrate 310.

Hereinafter, the sanitary napkin 1F of the sixth embodiment will be described.

As shown in FIG. 9, the stretchable sheet 6 of the sanitary napkin 1F of the sixth embodiment is a surface of the sheet 61 on the skin contact surface side of one side portion 6a in the longitudinal direction of the stretch sheet 6, to sandwich the front surface. The sheet 2 and the absorbent body 4 are joined to the surface of the skin contact surface side of the front sheet 2 constituting the absorbent body 5 to form the joint portion 9. Further, as shown in Fig. 9, the other side portion 6b in the longitudinal direction of the stretch sheet 6 is disposed between the absorbent body 4 and the back sheet 3, and the sheet 61 on the skin contact surface side of the other side portion 6b is The surface is bonded to the surface of the back sheet 3 to form a joint portion 9D. In this manner, the belt-shaped stretch sheet 6 is disposed in the longitudinal direction (Y direction) and joined to the side portion 5a in the longitudinal direction (Y direction) of the absorbent body 5, and thus is formed by contraction of the stretch sheet 6 A leak-proof wall 7 having a portion that is erected in a hollow ring shape. The bonding is performed by heat sealing or an adhesive or the like. In the sixth embodiment, the joint portion 9 is formed by heat sealing, and the joining of the sheet 62 on the non-skin contact surface side of the stretch sheet 6 and the absorbent body 4 is performed by an adhesive. Further, in the sixth embodiment, the joining of the front sheet 2 and the absorber 4 is performed by an adhesive. In the sixth embodiment, the joining of the sheet 61 on the skin contact surface side of the stretch sheet 6 and the back sheet 3 (joining portion 9D) is performed by heat sealing.

As shown in Fig. 9, the plurality of elastic members 63 constituting the stretch sheet 6 of the sanitary napkin 1F of the sixth embodiment are disposed on at least the side of the skin contact surface in at least the excretion area a. The position of the side edge (outer edge 9b) on the outer side in the width direction (X direction) of the joint portion 9 of the material 61 and the front sheet 2 is closer to the inside of the leakage preventing wall 7 (near the center line CL of the sanitary napkin 1F). . Further, as shown in FIG. 9, the sanitary napkin 1F of the sixth embodiment has a leakage preventing wall 7 at a side edge (inner side 9a) from the inner side in the width direction (X direction) of the joint portion 9 in at least the excretion portion region a. It is formed in the inside of the sanitary napkin 1 (close to the center line CL of the sanitary napkin 1F). Therefore, as shown in FIG. 9, a plurality of the plurality of elastic members 63 are disposed in the drain portion 7 at least at the position of the inner edge 9a of the joint portion 9 (close to the physiological wall). The center line of sanitary cotton 1F CL).

As shown in Fig. 9, the sanitary napkin 1F of the sixth embodiment has a side portion 31a which is a portion 3a of the back sheet 3 which extends from the side edge 5a of the self-absorbent body 4, and an absorbent body laminated to the portion 3a. A non-woven sheet 310 joined on the side of the 4 sides and joined between the layers. In the side flap portion 31, as shown in Fig. 9, an adhesive 311 is disposed on the surface of the extended portion 3a on the side where the nonwoven fabric sheet 310 is not laminated, and the sanitary napkin 1F is fixed to the shorts via the adhesive 311. The side of the non-skin contact surface of the crotch of the underwear.

The effect of the use of the sanitary napkin 1F of the sixth embodiment of the present invention described above will be described.

The sanitary napkin 1F of the sixth embodiment can obtain the same effects as the sanitary napkin 1A of the first embodiment.

The absorbent article of the present invention can be suitably used for, for example, an incontinence pad, a sanitary pad, or the like, in addition to a sanitary napkin.

[Industrial availability]

According to the absorbent article of the present invention, it is possible to effectively prevent menstrual blood from flowing backward and the body fluid from leaking backward from the rear, thereby obtaining excellent leakproofness.

2. . . Front sheet

3. . . Back sheet

3a. . . Extended part

4. . . Absorber

5. . . Absorbing ontology

5a, 5c, 42c. . . Side of the absorbent body 5

5b. . . Front end

5d. . . Back end

6. . . Flexible sheet

6a. . . One side of the stretchable sheet 6

6b. . . The other side of the stretchable sheet 6

7. . . Leakproof wall

7b, 41a, 42a. . . Front end

7c. . . Intermediate fixed part

7d, 41b, 42b. . . Rear end

8. . . Embossed groove

9, 9D. . . Joint

9a. . . Medial edge

9b. . . Outer edge

31. . . Flank

32. . . Rear wing

40. . . Middle and high department

41. . . Middle and high section

42. . . Rear middle and high

43. . . Lower absorber

61. . . Skin contact side sheet

62. . . Non-skin contact side sheet

63. . . Elastic member

71. . . Base wall

71a. . . Upper end

71b. . . Fixed end

72. . . Elastic expansion joint

72b. . . Front elastic expansion

72d. . . Rear elastic expansion

73. . . top

74. . . Flexion of the skin contact side

75. . . Flexion of the non-skin contact side

80. . . Frontmost middle groove

81. . . Outer groove

82. . . Intermediate groove

83. . . Rear middle groove

84. . . Final square groove

310. . . Flank forming substrate

311. . . Adhesive

721. . . Inner extension

722. . . External extension

1A, 1B, 1C, 1D, 1E, 1F. . . Physiological cotton

a. . . Excretory area

b. . . Front area

c. . . Central department

d. . . Rear area

CT. . . Central area

TL. . . Tangent

IL. . . Imaginary line

Figure 1 is a perspective view of a sanitary napkin according to a first embodiment of the present invention;

Figure 2 is a cross-sectional view taken along the line X1-X1 of the sanitary napkin shown in Figure 1;

Figure 3 is a cross-sectional view taken along the line X2-X2 of the sanitary napkin shown in Figure 1;

Figure 4 is a perspective view showing the state of use of the sanitary napkin shown in Figure 1;

Figure 5 is a plan view showing a sanitary napkin according to a second embodiment of the present invention;

Figure 6 is a plan view showing a sanitary napkin according to a third embodiment of the present invention;

Figure 7 is a cross-sectional view showing a leakage preventing wall on the left side of the sanitary napkin according to the fourth embodiment of the present invention;

Figure 8 is a cross-sectional view showing a leakage preventing wall on the left side of the sanitary napkin according to the fifth embodiment of the present invention;

Fig. 9 is a cross-sectional view showing the leakage preventing wall on the left side of the sanitary napkin according to the sixth embodiment of the present invention.

2. . . Front sheet

3. . . Back sheet

4. . . Absorber

5. . . Absorbing ontology

5b. . . Front end

5c, 42c. . . Side

5d. . . Back end

7. . . Leakproof wall

7b, 41a, 42a. . . Front end

7c. . . Intermediate fixed part

7d, 41b, 42b. . . Rear end

8. . . Embossed groove

31. . . Flank

32. . . Rear wing

40. . . Middle and high department

41. . . Middle and high section

42. . . Rear middle and high

63. . . Elastic member

71. . . Base wall

72. . . Elastic expansion joint

72b. . . Front elastic expansion

72d. . . Rear elastic expansion

81. . . Outer groove

82. . . Intermediate groove

83. . . Rear middle groove

84. . . Final square groove

1A. . . Physiological cotton

a. . . Excretory area

b. . . Front area

c. . . Central department

d. . . Rear area

CT. . . Central area

Claims (4)

An absorbent article comprising a front sheet comprising a skin contacting side, a back sheet having a non-skin contact side, and an absorbent body interposed between the sheets and disposed in a length direction of the absorbent body a pair of leakage preventing walls having elastic expansion portions on both sides; the elastic expansion and contraction portion is fixed to the front end portion of the absorbent body and the front and rear end portions in an extended state, and is in the natural state at the front and rear ends The intermediate fixing portion between the portions is bent forward and backward, and the absorber has a middle-high portion that is raised toward the front sheet side in a central portion in the width direction, and the middle-high portion includes a front middle high portion and a rear middle high portion, and the front middle high portion The excretion portion is formed in contact with the body fluid discharge portion of the wearer, and the pair of the intermediate fixing portions are disposed outward in the width direction of the region in which the rear middle portion is disposed, and the front middle portion and the rear middle portion are An intermediate groove formed by compacting the front sheet and the absorber is formed along the width direction of the absorbent article. The rear end portion of the rear middle-high portion is formed with a rear intermediate groove formed by compacting the front sheet and the absorber along the rear end portion, and the pair of the intermediate fixing portions are formed separately from the rear end portion At a position further rearward of the intermediate groove, a pair of the rear end portions of the pair of leakage preventing walls are respectively extended at positions rearward of the rear intermediate groove, and are fixed to the front sheet. An absorbent article of claim 1, wherein The elastically stretchable portion has a planar shape, and each of the pair of leakage preventing walls includes a base wall portion, and the pair of the leakage preventing walls are formed with a pair of the base wall portions and a planar surface that is respectively connected to an upper end portion of the base wall portion. The above elastically stretchable portion. The absorbent article according to claim 2, wherein, in each of the pair of the intermediate fixing portions, the planar elastically stretchable portion is formed such that the elastically stretchable portion is directly fixed to the front sheet in the width direction inner side, or The base wall portion that is folded is indirectly fixed to the front surface sheet, and a free end projecting portion that protrudes outward in the width direction is formed on the outer side in the width direction of the elastic stretchable portion. The absorbent article according to claim 1, wherein the pair of the leakage preventing walls are joined to the absorbent body by one side and the other side of the longitudinal direction of the strip-shaped stretchable sheet, respectively, in the excretion portion The region is formed to be erected in a hollow ring shape.