JPH08224272A - Absorbent articles - Google Patents

Abstract

PURPOSE: To lessen the possibility of the occurrence of lateral leakage by successively providing the non-skin contact surface side of absorbent articles with flaps arranged in both right and left side parts of a central absorber part and extending the wing parts of leakproof walls formed by folding these flaps toward the top sheet side of the central absorber part. CONSTITUTION: A sanitary napkin 1 is provided with the flaps 20 in both right and left side parts of the central absorber part 10 arranged with the absorber between a liquid permeable top sheet 11 and a liquid impermeable back sheet 12. The flaps 20 are successively placed on the non-skin contact surface side of the sanitary napkin 1 and are folded toward the top sheet 11 side, by which the flaps are formed as the waterproof walls 21 existing at both right and left side edges of the central absorber part 10. The flaps are folded back toward the outer side of the central absorber part 10, by which the leakproof surfaces 24 are formed. Namely, the leakproof surfaces 24 in contact with an excretion part are formed approximately parallel with the skin contact surface of the central absorber part 10 and these leakproof surfaces 24 are extended with the wing parts 30 for fixing this napkin 1 at the time of use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to absorbent articles such as sanitary napkins that are worn in contact with the skin to absorb body fluids, and more particularly, absorbent articles excellent in side leakage prevention performance. It is about.

[0002]

2. Description of the Related Art Conventionally, various absorbent articles such as disposable diapers and sanitary napkins have been proposed and put to practical use, but they are worn by users due to side leakage. Since there is a problem that it may be contaminated and this gives a user an unpleasant feeling, various improvements have been made to solve this problem.

For example, leak-proof walls are formed on both sides in the longitudinal direction of the absorbent article, the shape of the absorbent article itself corresponds to the shape of the mounting site in advance, and an elastic body is provided to change the shape at the time of mounting. It has been proposed to make it possible to follow changes, and more specifically, in Japanese Utility Model Publication No. 60-19693.
Japanese Patent Laid-Open Publication No. Sho 60/1987 proposes an absorbent article in which a flap portion obtained by laminating a top sheet and a back sheet on both left and right sides is bent on the surface of the absorbent article.
Japanese Patent No. 3491 proposes an absorbent article obtained by folding a flap portion, which is obtained by pasting a top sheet and a back sheet on both left and right sides, to the surface of the absorbent article and then folding the flap toward the outside. .

However, in the absorbent article described above, while the user places the excretion part in the central part of the absorbent body and wears the underwear in close contact with the body, the liquid leakage from the absorbent body is reduced. It has not yet been possible to completely prevent liquid leakage. In particular, during the actual use, the wearing state of the absorbent article is not limited to the above-described wearing state, and the excretory part is worn in a state of being displaced from the central part of the absorber, or the worn absorbent article is worn by the wearer. There is a case that it cannot follow the complicated shape due to the movement of the absorbent article, and there is a gap between the absorbent article and the wearing site. The current situation is that no preventive effect can be obtained. Further, the above-mentioned absorbent article is one in which both front and rear ends of the folded flap portion are adhered to the absorbent article at the front and rear end portions of the absorbent article, and a portion that comes into contact with the excretion part of the user when worn. Was not sufficiently fitted, and side leakage still occurred.

Therefore, it is an object of the present invention to provide an absorbent article which is excellent in fit to a portion which comes into contact with a user's excretory portion when worn and which is less likely to cause side leakage.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to a central absorbent body portion having a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body arranged between the two sheets, and In an absorbent article having flaps provided on both left and right sides of the central absorbent body part, the flaps are continuously provided on the non-skin contact surface side of the absorbent article, and the central absorbent body part is also provided. It is folded toward the top sheet side of
Leak-preventing walls are formed at the left and right edges of the central absorbent body, respectively, and are further folded back toward the outside of the central absorbent body to form a leak-proof surface. The wall is fixed to the central absorbent body part in the front part and the rear part of the part that comes into contact with the excretory part of the user when worn,
The leak-proof surface at the portion contacting the excretion portion is formed in a plane shape substantially parallel to the skin contact surface of the central absorbent body portion, and the leak-proof surface is provided with the absorbent article when the absorbent article is used. The above object is achieved by providing an absorbent article characterized in that a wing portion for fixing the elastic article is extended.

[0007]

In the absorbent article of the present invention, the flap continuously provided on the non-skin contact surface side is bent toward the top sheet side of the central absorbent body portion to form a leak preventive wall. It is folded back to form a leakproof surface. In addition, the leak prevention wall,
It is fixed to the central absorbent body part in the front part and the rear part of the part that comes into contact with the excretory part of the user when worn, so that the leak-proof surface in the part that comes into contact with the excretory part is the central absorbent body. It is formed in a plane shape substantially parallel to the skin contact surface of the portion. Further, a wing portion for fixing to the shorts is extended from the leak-proof surface. And, the sanitary napkin which is the absorbent article of the present invention, by having such a structure, a side pocket is formed between the flap and the central absorbent body portion, and body fluid flows from the surface of the top sheet. Also, since the body fluid does not leak through the flap and the leak-proof surface can be provided at a position higher than the skin-contacting surface of the sanitary napkin, even if the absorbent body twists and becomes thicker, the fitting property does not increase. It never drops. Also,
The leak-proof surface spreads along the wearer's skin during wearing, and the flap is not folded into the absorber, so that side pockets are stably formed, and further, the absorber is prevented from twisting. Further, the wing portion allows the absorbent article to be firmly fixed to the shorts or the like, and does not cause a shift during use.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings. Here, FIG. 1 shows a first absorbent article of the present invention.
Is a perspective view showing a sanitary napkin as an example of,
2 is a schematic view showing a cross section of the sanitary napkin shown in FIG. 1, and FIG. 3 is a schematic view showing a cross section of the shorts with the sanitary napkin shown in FIG.

The sanitary napkin 1 of the present embodiment shown in FIGS. 1 and 2 has a liquid-permeable top sheet 11, a liquid-impermeable back sheet 12, and an absorbent body 13 disposed between both sheets. And a flap 20 provided on both left and right sides of the central absorbent body portion 10. Such a structure is similar to a normal sanitary napkin.

Further, the sanitary napkin 1 of the present embodiment will be described. The top sheet 11 and the back sheet 12 are formed larger than the absorbent body 13 as a whole so as to each have an extension. The flap is formed by bonding the extension portion of the top sheet and the extension portion of the back sheet together. Moreover, this forms the front edge part 4 and the rear edge part 5. Here, the top sheet 11 and the back sheet 12 are attached by a usual method such as a heat sealing method or an adhesive method.

The sanitary napkin 1 is provided on the non-skin contact surface 3 of the central absorbent body 10 of the sanitary napkin 1.
A slip prevention agent (not shown) is provided for sticking the sanitary napkin 1 to shorts during use.

The material for forming the topsheet 11 and the backsheet 12 is not particularly limited as long as it is generally used as the topsheet and backsheet of absorbent articles such as sanitary napkins. . As the absorbent body 13, a commonly known absorbent body made of pulp, super absorbent polymer or the like can be used without particular limitation.

Thus, the sanitary napkin 1 of this embodiment is
As shown in FIGS. 1 to 3, the flap 20 is continuously provided on the non-skin contact surface 3 side of the sanitary napkin, and further toward the top sheet 11 side of the central absorbent body portion 10. It is bent to form leak-proof walls 21 located on the left and right side edges of the central absorbent body 10, respectively.
The central absorbent body portion 10 is folded back toward the outside to form a leak-proof surface 24, and the leak-proof wall 21 is a front portion and a rear portion of the portion 6 that comes into contact with a user's excretory portion when worn. At the central absorbent body 10 and the leak-proof surface 24 at the portion 6 contacting the excretory portion is formed in a plane shape substantially parallel to the skin contact surface 2 of the central absorbent body 10. In addition, a wing portion 30 for fixing the absorbent article when the absorbent article is used is extended on the leak-proof surface.

More specifically, as shown in FIG. 2, the top sheet 11 covers the side surface of the absorbent body 13 and its extension is attached to the extension of the back sheet 12, As a result, the flap 20 formed by the extension of the top sheet 11 and the extension of the back sheet 12 is continuously provided on the non-skin contact surface 3 side.

Further, as shown in FIG. 2, the flap 20 is bent at the side edge of the central absorbent body portion 10 to form the leakproof wall 21, and as shown in FIG. On the skin contact surface 2 of the sanitary napkin 1.
It is folded back toward the outside of the central absorbent body 10 at a slightly higher position to form the leak-proof surface 24.

Further, the leak preventive wall 21 has a front fixed portion 22 (see FIG. 1) and a rear fixed portion 23 (see FIG. 1) at the front and rear portions of the portion 6 contacting the excretion portion.
Reference] to the top sheet 11 of the central absorbent body 10. Here, the above-mentioned “site that contacts the excretion part” refers to the surface portion of the sanitary napkin that is in contact with the excretion part of the wearer when the sanitary napkin is used, and specifically, the sanitary napkin. It is a portion located between the fixing portion 22 and the fixing portion 23 in the longitudinal direction of the napkin. Further, the "front portion" refers to all of the portion located in front of (the front side of the wearer) the portion 6 that contacts the excretion portion, and includes the front edge portion. Furthermore, the “rear part” refers to all of the parts located rearward (rear side of the wearer) with respect to the site 6 contacting the excretory part, and also includes the rear edge part. Further, the fixing parts 22 and 23 can be easily formed by using an adhesive or the like which is usually used for absorbent articles, or by heat sealing or the like.

By being thus fixed, as shown in FIG. 2, a side wall is provided between the leak-proof wall 21 and the central absorbent body portion 10 in the portion 6 which comes into contact with the excretion portion. A pocket 25 is formed. Further, as shown in FIG. 2, by being fixed as described above, the leak-proof surface 24 in the portion 6 contacting the excretion part is slightly above the skin contact surface 2 and the central absorption. It is formed in a plane shape substantially parallel to the skin contact surface 2 of the body part 10.

In the sanitary napkin 1 of this embodiment, the flap 20 is provided at the front edge portion 4 and the rear edge portion 5.
Is not fixed, and is forward of the front fixed portion 22 (a portion located on the front side of the wearer when used in a sanitary napkin) and rearward of the rear fixed point 23 (when used in a sanitary napkin, In the portion located on the rear side), the above-mentioned folded state is gradually released toward the front or the rear, and the flap 20 is released.
Has a substantially flat surface shape, and stably forms and holds the side pocket 25 and the shape of the leak-proof surface 24 substantially parallel to the skin contact surface 2.

The wing portion 30 is formed by extending the left and right side edges of the back sheet 12 and the top sheet 11 on the leak-proof surface 24 outward from the left and right side edges of the absorbent body. An adhesive portion 31 is formed on the non-skin contact surface 3 side of the wing portion 30 by applying an adhesive. As the pressure-sensitive adhesive, a generally known pressure-sensitive adhesive can be used without particular limitation.

Further, in the sanitary napkin 1 of the present embodiment, the length L of the portion 6 contacting the excretory part is preferably 3 to 20 cm, more preferably 5 to 15 cm. Further, in the sanitary napkin 1, the length M of the napkin front portion located in front of the fixing portion 22 is
It is preferably 0 to 10 cm, and more preferably 2 to 8 cm.
cm. Furthermore, in the sanitary napkin 1, the length N of the napkin rear portion located rearward of the fixing portion 23 is preferably 3 to 25 cm, and more preferably 5 to 18 cm.

Further, the width S of the leak-proof surface 24 at the portion 6 contacting the excretion part is preferably 0.5 to 4 cm.
And more preferably 0.7 to 2.5 cm.
If it is less than 0.5 cm, the leak preventive wall 21 may lie down on the central absorbent body 10 and the side pocket 25 may not be formed. If it exceeds 4 cm, it is difficult to maintain the planar shape of the leak preventive surface 24. Furthermore, since it may induce liquid leakage, it is preferably within the above range. Further, the height of the leak preventive surface 24 (the height from the non-skin contact surface 3) U (see FIG. 2)
Is preferably 40 mm or less, more preferably 5 to 25
mm. Further, the width T between the left and right leak preventive surfaces 24 in the portion 6 contacting the excretion part is 30 mm or more so that the leak preventive surface 24 does not block the skin contact surface 2 of the central absorbent body part 10. Preferably. Further, the length of the wing portion 30 (the length along the width direction of the sanitary napkin 1) is 10
It is preferably -100 mm, more preferably 20-80 mm.

Since the sanitary napkin 1 of this embodiment has the above-mentioned structure, the leak-proof surface 24 fits the wearer's skin well, and side leakage can be effectively prevented. It is possible, specifically, the side pocket 25 described above.
By the formation of the excrement, the excrement flowing on the surface of the top sheet 11 once flows into the side pockets 25, and then from the side surface of the central absorbent body portion 10 to the absorbent body 13.
Therefore, it is possible to effectively prevent side leakage. Further, since the wing portion 30 is provided, the leakproof wall and the leakproof surface can be stably formed.

In order to use the sanitary napkin 1, as shown in FIG. 3, the wing portion 30 is bent toward the shorts and the adhesive portion 31 is shorted.
Can be used by sticking to the surface of
As a result, the sanitary napkin 1 can be firmly fixed, and the displacement during use can be prevented. Further, since the sanitary napkin 1 of the present embodiment is configured as described above when used in this way, a larger side pocket 25 is formed as compared with the case where the wing portion 30 is not provided, and Side leakage can be effectively prevented.

Further, in the sanitary napkin 1 of this embodiment, elastic members 26 are arranged at the portions of the leak-proof surface 24 that come into contact with the excretion portion. By disposing the elastic member 26, the shape of the leak preventive wall 21 is favorably maintained, and the central absorbent body portion 10 of the leak preventive surface 24 is maintained.
The planar shape substantially parallel to the skin contacting surface 2 is favorably maintained, and the fit to the wearer is further improved. Further, by arranging the elastic member 26 on the leak-proof surface 24 [outward of the turn-back line 27 (see FIG. 2)], the shape of the side pocket 25 can be enlarged, and lateral leakage can be effectively performed. Can be prevented. The elastic member 2
No particular limitation is imposed on 6 as long as it is an elastic member usually used for absorbent articles, but foams of polyolefins and polyurethanes, natural rubber and the like can be particularly preferably used. Moreover, the shape is a string shape, a film shape,
It may have a flat shape or the like, and in this embodiment, a string-shaped elastic member is used. Also, the elastic member 2
The number of 6 is not particularly limited, but when the elastic member 26 has a string-like shape, the number of 2 or more is effective in terms of shape retention and lateral leakage prevention. In addition, the elastic member 2
It is preferable that 6 has an elastic force such that the stress at the time of 20% elongation of the flap 20 on which the elastic member 26 is arranged is 100 g or less. In addition, the absorbent article of the present invention is not limited to the above-mentioned embodiments, and can be applied to, for example, disposable diapers.

Next, the second to fourth embodiments of the absorbent article of the present invention will be described with reference to FIGS. here,
4 is a sectional view [corresponding to FIG. 2] showing a sanitary napkin as a second embodiment of the absorbent article of the present invention.
FIG. 7 is a cross-sectional view [corresponding to FIG. 2] showing a sanitary napkin as a third embodiment of the absorbent article of the present invention. FIG.
It is a perspective view [equivalent figure of FIG. 1] which shows the sanitary napkin as a 4th Example of the absorbent article of this invention. The second to fourth
This embodiment is the same as the first embodiment described above except that it is not particularly described.

In the sanitary napkin 1 of the second embodiment shown in FIG. 4, the flap 20 is formed by a sheet 40 other than the top sheet 11 and the back sheet 12.

As the other sheet 40 described above, a waterproofed sheet, a liquid impermeable sheet, or the like can be used. Examples of the waterproofed sheet include a nonwoven fabric treated with a water-repellent oil agent, and the liquid-impermeable sheet includes ethylene, a plastic sheet such as polypropylene, or a laminated sheet of a nonwoven fabric. Etc. can be mentioned.

More specifically, the above-mentioned top sheet 11
Covers the left and right side surfaces of the absorbent body 13 and covers the left and right side edges of the non-skin contact surface 3 side, and the other sheet 40 is
The edge portion is sandwiched and fixed by the top sheet 11 and the back sheet 12 on the non-skin contact surface 3 side, whereby the flap 20 is continuously provided on the non-skin contact surface 3 side. There is. The flap 20 has a leak preventive wall 21, a leak preventive surface 24, and a wing portion 30 in the same manner as the flap 20 in the first embodiment, and the side edge of the leak preventive surface 24 and the wing portion 30 are formed. The elastic member 26 is folded back at the side edge of the wing portion 30 toward the non-skin contact surface 3.
Is sandwiched between the folded-back portion and the leak-proof surface 24 and arranged.

In the sanitary napkin 1 of the third embodiment shown in FIG. 5, the flap 20 and the wing portion 30 are formed by the back sheet. Specifically, the back sheet 12 is joined to the top sheet 11 at one end on the non-skin contact surface 3 side, and further, the left and right side edges are extended outward to be formed. The flap 20 is continuously provided on the non-skin contact surface 3 side. In addition, the flap 20 is provided at the portion 6 that comes into contact with the excretion portion,
The wing portion 30 is formed so as to extend outward. The elastic member 26 is fixedly arranged via an adhesive, or is arranged by coating the elastic member with a thermoplastic polymer or the like and subjecting it to heat treatment.

In the sanitary napkin 1 of the fourth embodiment shown in FIG. 6, the flap 20 is extended outwardly in front of the portion 6 contacting the excretion portion, and the wing portion 30 is extended. Is provided in front of the portion 6 that contacts the excretion portion. As described above, in the absorbent article of the present invention, the position where the wing portion is provided is not particularly limited.

The same effects as those of the first embodiment described above can be obtained in the second to fourth embodiments.

The absorbent article of the present invention is not limited to the above-mentioned embodiment, but may have the following structure in the first embodiment shown in FIGS. 1 to 3, for example. . That is, in the sanitary napkin 1 of the present invention, as shown in FIG. 7, the flap 20 folded at the front edge 4 is heat-sealed with the leak-proof surface 24 facing upward in the folded state. Then, it may be fixed. As a result, the shape of the flap 20 in the portion 6 contacting the excretion portion can be maintained in a good condition, and further, the central absorbent body portion 10 is provided in the entire area of the portion contacting with the flap 20. The pocket 2 can be formed. In this case, the fixed point 22 on the front portion may not be fixed.

In the sanitary napkin 1 of the present invention, the flaps 20 folded back at the front edge 4 and the rear edge 5 are heat-sealed with the leak-proof surface facing upward in the folded back state. Then, it may be fixed. As a result, the shape of the flap 20 in the portion 6 contacting the excretion portion can be maintained in a good condition, and further, the side portions are formed over the entire area where the central suction body portion 10 and the flap 20 contact each other. Pockets can be formed. Further, in the front edge portion 4 and the rear edge portion 5, when the flap 20 folded back is heat-sealed with the leak-proof surface facing upward in the folded back state, and fixed, the above-mentioned front portion and The fixed points 22 and 23 on the rear portion may not be fixed.

Furthermore, in the first embodiment, an example in which the leak preventive wall 21 is fixed to the top sheet 11 on the surface (skin contacting surface) of the central absorbent body 10 has been described, but the present invention is not limited to this. For example, the central absorbent body portion 10 is not limited to the above.
The leak preventive wall 21 may be fixed to the top sheet 11 laterally.

In the first embodiment shown in FIGS. 1 to 3, the leakproof wall is fixed to the central absorbent body in a dot-like manner. It can also be fixed in a linear shape along the direction. At this time, the linear fixing can be fixed by an adhesive or heat seal in the same manner as the fixing point, and the length of the fixing portion formed by fixing the linear shape is arbitrary, At least one of the fixed portions formed on the front portion and the rear portion of the portion that contacts the excretion portion may extend to the front edge portion or the rear edge portion.

Further, in the first embodiment shown in FIGS. 1 to 3, the flap 20 and the wing portion 30 are formed by the extension portion of the top sheet 11 and the extension portion of the back sheet 12, respectively. As described above, the flap 20 and the wing portion 30 may be formed by either one of the extension portion of the top sheet 11 and the extension portion of the back sheet 12. Top sheet 1 above
In the case where the flap 20 and the wing portion 30 are formed by only the extension portion of No. 1, when a nonwoven fabric is used as the top sheet, the portion forming the flap 20 and the wing portion 30 is a waterproof nonwoven fabric. Is preferably used, and when an apertured film is used as the top sheet, the flap 20 and the wing portion 3 are used.
It is preferable to use a perforated film in which the portion forming 0 is not perforated.

[0037]

EFFECTS OF THE INVENTION The absorbent article of the present invention is excellent in fitability to the part that comes into contact with the excretory part of the user when worn, and is less likely to cause side leakage. Is played. Side pockets are formed between the flap and the central absorbent body portion, and even if body fluid flows from the surface of the top sheet, the body fluid does not leak through the flap. Since the leak-proof surface can be provided at a position higher than the skin-contacting surface of the sanitary napkin, the fitting property does not deteriorate even if the absorbent body twists and becomes thicker. The leak-proof surface spreads along the skin at the time of wearing, the flap is not folded into the absorbent body, and the side pocket can be stably formed. Since the leakproof surface spreads along the skin, the absorber is prevented from twisting. Liquid leakage is suppressed by the leak preventive wall and the leak preventive surface. The leak-proof surface can promote the spread of the flap on the skin, improve the fit to the skin, and reduce the discomfort. If the flaps are not fixed at the front and rear edges but are opened outward at the front and rear edges to form a substantially flat surface shape, the open flap prevents It is possible to stably form and hold the side pocket formed by the shape of the leak surface that is substantially parallel to the skin contact surface and the leak preventive wall. Since the absorbent article has the wing portion, it can be firmly fixed to the shorts or the like when the absorbent article is used, and the absorbent article is less likely to be displaced when the absorbent article is used.

[Brief description of drawings]

FIG. 1 is a perspective view showing a sanitary napkin as a first embodiment of an absorbent article of the present invention.

FIG. 2 is a schematic view showing an AA cross section of the sanitary napkin shown in FIG.

FIG. 3 is a schematic view showing a cross section of a state in which the sanitary napkin shown in FIG. 1 is attached to shorts.

FIG. 4 is a sectional view [corresponding to FIG. 2] showing a sanitary napkin as a second embodiment of the absorbent article of the present invention.

FIG. 5 is a cross-sectional view [corresponding to FIG. 2] showing a sanitary napkin as a third embodiment of the absorbent article of the present invention.

FIG. 6 is a perspective view showing a sanitary napkin as a fourth embodiment of the absorbent article of the present invention.

FIG. 7 is a perspective view showing another example of a sanitary napkin as an absorbent article of the present invention.

[Explanation of symbols]

 1 Sanitary Napkin 2 Skin Contact Surface 3 Non-Skin Contact Surface 10 Central Absorber Part 11 Topsheet 12 Backsheet 13 Absorber 20 Flap 21 Leak-proof Wall 22 Fixed Part 23 Fixed Part 24 Leak-proof Surface 25 Side Pocket 26 Elastic Member 30 Wing 40 Other sheet

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Minoru Nakanishi Minoru 3-chome, Minamikochi Town, Kawachi District, Tochigi Prefecture 23-11

Claims (5)

[Claims] 1. A central absorbent body portion comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body arranged between the sheets, and both left and right sides of the central absorbent body portion. In an absorbent article having a flap provided in a portion, the flap is continuously provided on the non-skin contact surface side of the absorbent article, and is folded toward the top sheet side of the central absorbent body portion. Is formed, the leakage preventing wall located on the left and right side edges of the central absorbent body portion, respectively, further, it is folded back toward the outside of the central absorbent body portion to form a leakage preventing surface, The leak-proof wall is fixed to the central absorbent body portion in the front part and the rear part of the part that comes into contact with the excretion part of the user when worn, and the leak-proof surface in the part that comes into contact with the excretion part is the above-mentioned. Formed in a plane substantially parallel to the skin contact surface of the central absorber It is, the absorbent article, wherein the said leak-barrier surface, the wing portion for fixing the absorbent article during use of the absorbent article is extended, that. 2. The absorbent article according to claim 1, wherein an elastic member is provided on the leakproof surface. 3. The absorbent article according to claim 1, wherein the flap is formed by adhering an extension portion of the top sheet and an extension portion of the back sheet to each other. 4. The flap is formed of a sheet other than the top sheet and the back sheet, and the other sheet is a waterproofed sheet or a liquid impermeable sheet. The absorbent article according to claim 1. 5. The absorbent article according to claim 1, wherein the flap is formed of the back sheet or the top sheet.