JP2002011044A - Diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To substantially decrease skin trouble such as diaper rash. SOLUTION: The diaper 10 having a fluid-permeating top sheet 11, a fluid- non-permeating back sheet 12 and an absorbent body 13 arranged between the top sheet 11 and back sheet 12, is provided with a skin-contact sheet 18 arranged on the top sheet 11 with at least its both longitudinal ends bonded to either the top sheet 11 or the back sheet 12, an opening part 20 formed at a part of the skin contact sheet 18 to make up an under-crotch area of the diaper 10, and flexible elastic members 21a, 21b, 22a, 22b connected to the skin contact sheet 18 in an extended state so as to surround the opening part 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diaper intended to reduce skin troubles on the buttocks while taking care that feces do not directly adhere to the buttocks of the wearer.

[0002]

2. Description of the Related Art With respect to the cause and mechanism of diaper rash, according to Kazuya Yamamoto's "So-called Diaper Rash" described in Dermatology, pp. 949-956 (1998), urine and stool are contaminated. When mixed, ammonia is generated, which makes the environment alkaline, and the enzymes in the stool are strongly activated in an alkaline atmosphere,
It states that the enzyme and ammonia cause inflammation of the weakened parts of the skin, causing diaper rash. Causes of weakened skin include mechanical stimuli such as the softness of the diaper components that come into contact with the skin, and the environment inside the diaper, where the high humidity inside the diaper may cause the skin to become soft. It is pointed out.

[0003] With respect to the above-mentioned causes of diaper rash, defecation was caused by, for example, absorbing the urine promptly after urination and reducing its penetration and diffusion by improving the performance accompanying the technological progress of the polymer absorbing member. Even in this case, it is possible to make it difficult to mix with this. In addition, regarding the environment inside the diaper, for example, by using a breathable sheet for the diaper, it is possible to take measures against stuffiness in the diaper, which has an effect of preventing the skin from becoming irritated. As measures against diaper rash have been developed in this way, skin troubles such as rash caused by the use of so-called disposable diapers have been reduced.

[0004] However, when urine and stool are excreted almost simultaneously, or for prevention of rash on loose stool, sufficient measures have not yet been taken. In the case of loose stool, if it is left unmixed with urine, the burden on the skin increases.
Since loose stool hardly passes through the top sheet of the diaper in contact with the skin, a part of the moisture remains on the top sheet and adheres to the buttocks of the wearer, except for a part of the water transfer to the absorber. For this reason, even if trouble does not occur on the skin, wiping the buttocks when changing diapers becomes complicated.

As described above, stool and urine are mixed,
To prevent stool from adhering to the buttocks, see, for example,
A diaper capable of separating urine and stool has been proposed in JP-A-1-41304, JP-A-6-5614, JP-A-6-21623, and JP-A-6-11723.

The diaper disclosed in Japanese Patent Application Laid-Open No. 61-41304 has a top sheet provided with a long opening in the center of the top sheet and an elastic member attached along the peripheral edge of the opening. The sheet is given a so-called stiffness to prevent the opening from being closed. Also, the diaper disclosed in Japanese Utility Model Laid-Open No. 6-5614,
A concave portion extending below the opening provided in the topsheet and a valve portion having the topsheet extending from the periphery of the opening to the center thereof are provided so that the stool separated by the opening does not return. Is considered. 6-21623
The diaper disclosed in Japanese Patent Laid-Open Publication No. H10-15064 has two sets of flaps extending in the length direction and the width direction, and by forming an opening in the center thereof, the area of the opening for storing the stool can be set to be large. It was made. In addition,
The diaper disclosed in Japanese Patent Publication No. 11723 discloses a diaper in which a second topsheet is provided on a first topsheet, and an opening provided at a central portion in the longitudinal direction of the second topsheet is expanded in a lateral direction. Are further provided.

[0007]

Problems to be Solved by the Invention
In the case of the diaper disclosed in Japanese Patent Publication No. 4 and Japanese Utility Model Laid-Open Publication No. Hei 6-5614, when observing the appearance of wearing the diaper, the crotch region of the diaper is brought to the center by the thighs of both legs of the wearer, It turned out that it was in a state of hanging down without adhering to the surface. That is, in these diapers, the crotch region of the top sheet or the top sheet (hereinafter, these are collectively referred to as top sheets) does not adhere to the wearer's crotch, so the opening provided in the top sheet does not make sense. This causes a problem that the flight spreads on the top sheet. Even if the position of the opening of the top sheet and the position of the wearer's anus match,
Since the top sheet is not in close contact with the inseam of the wearer, the opening is in a closed state, and it is expected that the stool cannot be guided between the top sheet and the back sheet via the opening.

Further, in the case of the diaper disclosed in Japanese Utility Model Laid-Open Publication No. Hei 6-11723, the opening is only widened in the width direction, and the opening is crushed by the wearer's inseam, and the opening is crushed. As in the prior art, the function of the opening cannot basically be sufficiently exhibited.

Further, in the case of the diaper disclosed in Japanese Utility Model Laid-Open Publication No. Hei 6-21623, the area of the opening formed in the second topsheet is made large so that the position of the opening can be adjusted to the anus of the wearer. Although the position can be almost surely matched, the opening area of the opening is too large, so that the stool guided between the second top sheet and the first top sheet through this opening is not sufficient. There is a high possibility that it will return from the opening to the top of the second topsheet again, and will stain the buttocks of the wearer.

[0010]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an improved diaper which is provided with an opening for separating stool in a top sheet and which can sufficiently exhibit a diaper function intended to reduce skin troubles such as diaper rash. Is to provide.

[0011]

According to the present invention, there is provided a diaper comprising:
A liquid-permeable top sheet, a liquid-impermeable back sheet, and a diaper having an absorber disposed between the top sheet and the back sheet, wherein at least the diaper is disposed on the top sheet. A skin contact sheet having both ends in the longitudinal direction joined to the top sheet or the back sheet; an opening formed in a portion of the skin contact sheet serving as a crotch region of a diaper; and the skin contact surrounding the opening. A stretchable elastic member joined to the sheet in an extended state is provided.

According to the present invention, when the diaper is worn, the skin contact sheet comes into close contact with the wearer due to the contraction force of the elastic member joined to the skin contact sheet in the extended state. The opening formed in the contact sheet is surrounded by an elastic member in an extended state, and a tension is applied so that the diameter of the opening is increased, and the stool is guided between the top sheet and the back sheet. .

In the diaper according to the present invention, at least four elastic members may be extended from the front body to the rear body of the diaper, and may pass through the vicinity of the opening. In this case, it is also possible to arrange two sets of two elastic members so as to cross the skin contact sheet so as to cross and surround the opening.

At least two elastic members extend from one side edge of the front body of the diaper to one side edge of the rear body through the crotch region so as to sandwich the opening. The elastic member may extend from the other side edge of the front body of the diaper to the other side edge of the back body through the crotch region so as to sandwich the opening.

Alternatively, at least two elastic members extend from one side edge of the front body of the diaper to the other side edge of the front body through the crotch region so as to sandwich the opening. The elastic member may extend from one side edge of the rear body of the diaper to the other side edge of the rear body through the crotch region so as to sandwich the opening.

Further, it is preferable that the elastic member is disposed so that tension acts substantially uniformly in the direction opposite to the opening, whereby substantially uniform deformation is caused along the opening end of the opening, and the shape is stabilized. A wide opening is formed.

A notch may be formed at the center in the width direction of the skin contact sheet, which is the front body region of the diaper. In this case, it is effective to make the skin contact sheet liquid-impermeable.

Further, a second absorbent body may be arranged on a portion of the skin contact sheet which is a front body region of the diaper. In this case, the second absorber may include a mixture of a polymer absorbing member and microfibril cellulose, and may be formed by coating the skin contact sheet.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the diaper according to the present invention is applied to a pants-type diaper will be described in detail with reference to FIGS. 1 to 12. However, the present invention is not limited to such an embodiment. Can be further combined or applied to other techniques that are to be encompassed by the inventive concept described in the claims herein.

FIG. 1 shows the appearance of the diaper according to the present embodiment, FIG. 2 shows its developed shape, and FIG. 3 shows its cross-sectional structure taken along the line III-III. FIG. 4 shows the cross-sectional shape of the center. That is, the diaper 10 in the present embodiment includes a pants-shaped liquid-permeable top sheet 11 as a whole,
A liquid-impermeable backsheet 12 on which 1 is superimposed;
A substantially hourglass-shaped sheet-shaped absorbent body 1 disposed between the top sheet 11 and the back sheet 12 and extending from the front body 10F to the back body 10R of the diaper 10.
3 and a plurality of elastic members 1 around the waist that can be stretched and held between the top sheet 11 and the back sheet 12 in an extended state along the waist opening 14 of the diaper 10.
5, a plurality of elastic members 17 around the leg that are stretchable along the leg opening 16 of the diaper 10 and held between the top sheet 11 and the back sheet 12, and are disposed on the top sheet 11. The diaper 10 extends from the front body 10F to the back body 10R of the diaper 10 and has both ends 1 in the longitudinal direction.
Skin contact sheet 8E is joined to top sheet 11, and a substantially V-shaped or U-shaped cutout formed at the center in the width direction of the front contact area of diaper 10 of skin contact sheet 18. 19, an opening 20 formed in a portion to be a crotch region of the diaper 10 in the center of the skin contact sheet 18, and an opening 20
And two stretchable elastic members 21a, 21b, 22a, 22b each of which is joined in an extended state along the longitudinal direction of the skin contact sheet 18 so as to surround the elastic member.

The skin contact sheet 18 in this embodiment comprises an upper sheet 18U and a liner sheet 18L which are superimposed on each other, and the two sets of elastic members 21a, 21b, 22a, 22b are connected to the upper sheet 18U. It is sandwiched between the liner sheet 18L. One set of elastic members 21a and 21b extends from one end in the width direction of the front body region, passes through the crotch region so as to sandwich the opening 20, and extends to the other end in the width direction of the back body region. The elastic members 22a and 22b extend from the other end in the width direction of the front body region, pass through the crotch region so as to sandwich the opening 20, and extend to one end in the width direction of the back body region. That is, the two sets of elastic members 21a, 21b, 22a, 22b
The skin contact sheet 18 is disposed so as to cross each other so as to intersect each other with the opening 0 interposed therebetween. Around the opening 20, these two sets of elastic members 21 a and 21 are provided.
b, 22a, 22b.

As the top sheet 11, it is preferable to use a liquid permeable nonwoven fabric made of polyethylene, polypropylene, polyester, synthetic fiber made of other thermoplastic resin, or the like.

As the back sheet 12 constituting the so-called diaper cover, a liquid-impermeable sheet can be used alone, but it is also possible to use a laminate of a plurality of nonwoven fabrics. As the liquid-impermeable sheet, a liquid-impermeable polyethylene sheet, preferably a polyethylene sheet provided with micropores for air permeability, or a moisture-permeable sheet such as a sheet stretched by adding a filler to a thermoplastic resin is used. It is preferable to use a certain liquid impermeable sheet, and by giving such moisture permeability, it is possible to eliminate the fear of stuffiness and to be more comfortable. Furthermore, a nonwoven fabric made of synthetic fibers made of a thermoplastic resin such as polyethylene, polypropylene, or polyester may be attached to the surface of the back sheet 12 to improve the feel. In this case, the nonwoven fabric may be liquid-impermeable or liquid-permeable.

The absorber 13 is preferably made of a material mainly composed of fluff pulp made of wood pulp or non-wood pulp in combination with a polymer absorbing member (SAP). A mixture or a laminate of fused fibers is used. Further, in order to prevent the SAP from jumping out, it is preferable to adopt a laminated structure in which the whole is wrapped by the tissue 23.

The elastic members 15 and 17 disposed in the waist opening 14 and the leg opening 16 are elastic members used for ordinary disposable diapers made of natural rubber such as flat rubber, urethane thread and thread rubber. A possible elastic member is used, and is bonded and fixed using a hot melt adhesive or the like.

As the skin contact sheet 18, a nonwoven fabric, a mesh sheet, or a film made of polyethylene, polypropylene, polyester, synthetic fiber made of other thermoplastic resin, or the like is used. In this case, the front body region is made of a liquid-permeable nonwoven fabric or film, and the crotch region and the back body region are made of a liquid-impermeable nonwoven fabric.
Mesh sheets and films may be used.

The elastic members 21a, 21b, 22a, 22b
Can be used as it is, such as natural rubber ribbon-like flat rubber, urethane thread, thread rubber, elastic net, elastic film, etc. It has an arbitrary width dimension and is joined to the skin contact sheet 18 at an arbitrary elongation ratio by hot melt, heat sealing, or the like. In this embodiment, each elastic member 21a, 21b, 22a, 22b is
Although each book is used, a plurality of books may be used as necessary.

The opening 20 may have any shape, for example, a circle, an ellipse, or a star-shaped slit formed by intersecting two or more cuts.

As described above, at least four elastic members 21a, 21 joined to the skin contact sheet
Since b, 22a, and 22b extend from the front body 10F to the back body 10R of the diaper 10, the skin contact sheet 18 has a structure suspended inside the top sheet 11, and these elastic members 21a, 21
b, 22a, and 22b are stretched, the skin contact sheet 18 abuts on the wearer's skin in close contact, and a gap 24 is formed between the top sheet 11 and the skin contact sheet 18, where an opening 20 is formed. The stool is guided through. For this reason, the opening 20 of the skin contact sheet 18 is formed by the elastic members 21a, 21b, 2
It is necessary not to be blocked by the elastic force of 2a, 22b.

In this embodiment, the elastic member 2 is worn when worn.
The skin contact sheet 18 contracted by 1a, 21b, 22a, and 22b is pulled to an unfolded state as shown in FIG. 2, and the center of the crotch region is pulled straight around the opening 20. The elastic members 21a,
The diamond-shaped portions 21b, 22a, and 22b deform the diamond-shaped portions almost uniformly around the opening 20, and the diamond-shaped portions are held without being closed. In addition, since the elastic members 21a, 21b, 22a, 22b are arranged on the outer edge in the width direction of the skin contact sheet 18,
The skin contact sheet 18 can be in contact with the skin of the wearer to prevent its displacement, and the stool is not guided from the opening 20 of the skin contact sheet 18 onto the top sheet 11, so that the skin contact sheet 18 and the wearer's Even when the skin contact sheet 18 remains between the buttocks, the skin contact sheet 18 can function as a gather that prevents leakage from the outer edge in the width direction.

The wearer's urine is removed from the top sheet 11 by the notch 19 of the skin contact sheet 18 without passing through the skin contact sheet 18.
Quickly absorbed into 3. In the above-described embodiment, the pants-type diaper 10 has been described. However, the present invention relates to a deployment-type diaper in which the left and right sides of the front body 10F of the diaper 10 and the left and right sides of the rear body 10R are overlapped and stopped with tape. It can also be applied to mussels.

Further, the joining pattern of the elastic members 21a, 21b, 22a, 22b to the skin contact sheet 18 is not limited to the above-mentioned crossing pattern, but may be a pattern as shown in FIGS. Although other embodiments of the present invention are enumerated below, members having the same functions as those of the above-described embodiments are denoted by the same reference numerals, and redundant description will be omitted.

That is, the embodiment shown in FIGS.
In each case, the portion of the skin contact sheet 18 is shown in an unfolded state. In the embodiment shown in FIG. 5, one pair of elastic members 21a and 21b is provided with an opening 20 from one end side in the width direction of the front body region. Through the crotch region to extend to one end in the width direction of the back body region so that the other pair of elastic members 22a and 22b sandwich the opening 20 from the other end in the width direction of the front body region. It extends through the inseam area to the other end in the width direction of the back body area. Therefore, the elastic members 21b, 2 located outside the skin contact sheet 18 in the width direction are provided.
2b is arranged along both side edges of the skin contact sheet 18 in the width direction. The elastic members 21a and 22a located inside the skin contact sheet 18 in the width direction are curved so as to surround the opening 20. A pair of elastic members 21
The opening 20 is surrounded by a and 22a. In this case, the elastic members 21a and 22b and the elastic members 21b and 22a can be arranged so as to overlap or intersect at the side edges of the opening 20, respectively, but do not overlap as shown in the drawing. It is preferable to arrange them.

The reason is that when the elastic members 21a, 22b and the elastic members 21b, 22a intersect, the tension around the opening 20 becomes uneven, and the skin contact sheet 18
This is because wrinkles may occur, giving the wearer an uncomfortable feeling. In addition, since the elastic members 21b and 22b function to bring the side edges of the skin contact sheet 18 into close contact with the wearer, the elastic members 21a and 22a are provided.
When they intersect with each other, the adhesion of the skin contact sheet 18 deteriorates.

In this embodiment, when the skin contact sheet 18 is pulled during wearing, the elastic members 21b and 22b located on both side edges in the width direction are elongated, so that the opening 20 is pulled in both sides in the width direction. At the same time, the elastic members 21a and 22a are also pulled in the extending direction, and similarly to the previous embodiment, the deformation of the opening 20 surrounded by the elastic members 21a and 22a works almost uniformly around the periphery, and the opening 20 is Retained without blocking.

In the embodiment shown in FIG. 6, one pair of elastic members 21a and 21b pass through the crotch region so as to sandwich the opening 20 from one side edge of the front body region, and the other of the front body region. The other set of elastic members 22a,
22b extends from one side edge of the back body region through the crotch region to the other side edge of the back body region so as to sandwich the opening 20. That is, the elastic members 21b and 22b
Cross each other beyond the opening 20, and these elastic members 2
The opening 20 is surrounded by 1b and 22b. Elastic members 21a, 22b and elastic member 21
Although it is possible to arrange so that b and 22a overlap or cross each other, it is preferable to arrange so that they do not overlap as shown in the figure.

The reason is that when the elastic members 21a and 22b and the elastic members 21b and 22a intersect, the tension around the opening becomes uneven, and the skin contact sheet 18 is wrinkled, which may give the wearer an uncomfortable feeling. Because there is.

Also in this embodiment, when the skin contact sheet 18 is pulled at the time of wearing, the elastic members 21b and 22b surrounding the opening 20 are held in an extended state, and as in the previous embodiment, the elastic members 21b and 22b are held. The deformation of the opening 20 surrounded by 22b works substantially evenly around the opening, and the opening 20 is held without being closed.

In the embodiment shown in FIG. 7, the notch 19 in the embodiment shown in FIG. 5 is eliminated, and a second trapezoidal absorber 25 is arranged in the front body region of the skin contact sheet 18 instead. FIG. 9 shows a central cross-sectional shape from the front body to the back body. That is, when the second absorbent body 25 is arranged in the front body region of the skin contact sheet 18, the thickness of the absorbent body 13 can be set to be thin overall, and the skin contact sheet 18 can be kept even after urination. It can be kept dry. In the present embodiment, the second absorber 25 covered with the cover sheet 18C is disposed on the back side of the liner sheet 18L, but the second absorber 2 is located between the upper sheet 18U and the liner sheet 18L.
It is also possible to arrange 5. This second absorber 25
It is also possible to adopt the same structure as that of the absorbent body 13 described above. However, a coating solution obtained by dispersing a polymer absorbent member and microfibril cellulose in a mixed solution of propylene glycol or methanol and water is used as a skin contact sheet Coated directly on polyethylene or polypropylene,
It is preferable to apply a web formed by coating a nonwoven fabric made of synthetic fibers made of polyester or other thermoplastic resin to a skin contact sheet.

The above-mentioned microfibril cellulose is an ultrafine fiber having an average fiber length of 0.1 mm or less obtained by opening wood pulp under a high shear.

In the embodiment shown in FIG. 8, the notch 19 is eliminated, and the second absorber 25 having a diamond shape is arranged in the front body region of the skin contact sheet 18. However, the embodiment shown in FIG. In addition, elastic members 21c and 22c are further added. One additional set of elastic members 2
1c is disposed so that its bent end faces the bent end of the other set of elastic members 22a. Similarly, the added other set of elastic members 22c has its bent end formed of one set of elastic members. It is arranged so as to face the bent end of 21a.
The opening 20 is surrounded by the elastic members 21a and 22b,
The second absorber 25 is in a state surrounded by the elastic members 21b and 22a.

By arranging the elastic members 21b and 22a in this manner, the region where the second absorber 25 is arranged, surrounded by the elastic members 21b and 22a, becomes
A concave is formed by the contraction force of b, 22a, and the concave can function as a urine pool until urine is absorbed by the second absorber 25.

In order to prevent the stool and urine from being mixed, it is possible to add a device as shown in FIGS. 10 to 12 to the shape of the absorber 13 in the crotch region. Examples are listed below, but members having the same functions as those in the above-described embodiments will be denoted by the same reference numerals, and redundant description will be omitted.

That is, the embodiments shown in FIGS. 10 to 12 each show a structure in which the center of the diaper 10 is broken from the front body 10F to the back body 10R. In the embodiment shown in FIG. 5, the weir portion 13D located on the front body side of the opening 20 is formed in the crotch region immediately below the opening 20 over the width direction by increasing the thickness of the absorber 13. Then, the stool guided to the top sheet 11 from the opening 20 moves to the front body side and mixes with the urine, and conversely, the urine moves from the front body side to the crotch region and hardly mixes with the stool. Is considered.

The embodiment shown in FIG.
On the surface of the absorber 13 from the crotch region facing the zero to the back body region, a corrugated portion 20S capable of suppressing movement of feces is formed. The weir 26 for preventing movement is formed by the top sheet 11 along the width direction of the crotch region, and the upper end of the weir 26 is arranged so as to be in contact with the skin contact sheet 18.

In the embodiment shown in FIG. 12, the thickness of the absorber 13 from the crotch region facing the opening 20 to the back body region is reduced to form a pocket 27, and the pocket 27 is formed from the opening 20. The flight led to the top sheet 11
It is designed to make it difficult to move on top.

[0047]

According to the diaper of the present invention, an elastic member which can be extended and contracted in an extended state is joined to the skin contact sheet so as to surround the opening provided in the crotch region of the skin contact sheet. In addition to allowing the sheet to be in close contact with the wearer, the opening is held in a state where the opening is widened by the extension force of the elastic member, and when there is bowel movement, the stool is opened via the opening through the skin contact sheet and the top sheet. , The buttocks of the wearer are not stained, and as a result, the occurrence of skin trouble can be suppressed.

Further, two sets of two elastic members may be arranged in a crossed state on the skin contact sheet so as to intersect and surround the opening, or at least two elastic members may be provided on the front body of the diaper. An opening extends from one side edge of the rear body of the diaper to extend at least two elastic members from the one side edge to the other side edge of the front body through the crotch region so as to sandwich the opening. When extending to the other side edge of the back body through the crotch region so as to sandwich the, a substantially uniform contraction force acts around the opening,
In a state where these elastic members are extended, the openings can be reliably opened without closing the openings.

When a notch is formed at the center in the width direction of the skin contact sheet which is the front body region of the diaper,
Urine can be quickly absorbed by the absorber disposed between the top sheet and the back sheet. In this case, by making the skin contact sheet liquid impermeable, the buttocks of the wearer can be kept dry.

In the case where the second absorber is disposed in the portion of the skin contact sheet serving as the front body region of the diaper, urine can be absorbed quickly here so as not to mix with stool.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of one embodiment of a diaper according to the present invention.

FIG. 2 is a development view of the diaper shown in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a central sectional view of the diaper from the front to the back in the embodiment shown in FIG. 1;

FIG. 5 is a development view of another embodiment of the portion of the skin contact sheet used for the diaper according to the present invention.

FIG. 6 is a development view of another embodiment of a portion of a skin contact sheet used for a diaper according to the present invention.

FIG. 7 is a development view of still another embodiment of a portion of a skin contact sheet used for a diaper according to the present invention.

FIG. 8 is a development view of still another embodiment of a portion of a skin contact sheet used for a diaper according to the present invention.

9 is a central sectional view of the diaper from the front to the back in the embodiment corresponding to FIG. 7;

FIG. 10 is a central sectional view of a diaper according to another embodiment of the present invention from a front body to a back body.

FIG. 11 is a central cross-sectional view of another embodiment of the diaper according to the present invention, from the front to the back.

FIG. 12 is a central cross-sectional view of a diaper according to still another embodiment of the present invention from the front to the back.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Diaper 10F Front body 10R Back body 11 Top sheet 12 Back sheet 13 Absorber 13D Weir part 14 Waist circumference opening 15 Waist circumference elastic member 16 Leg circumference opening 17 Leg circumference elastic member 18 Skin contact sheet 18E Length of skin contact sheet Direction end 18U Upper sheet 18L Liner sheet 18C Cover sheet 19 Notch 20 Opening 20S Corrugated part 21a, 21b, 21c, 22a, 22b, 22c Elastic member 23 Tissue 24 Void 25 Second absorber 26 Weir 27 Pocket

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiaki Takamatsu 1-10-6 Shinonome, Koto-ku, Tokyo Inside Oji Paper Co., Ltd. Shinonome Research Center (72) Inventor Rie Kuwahara 1-10, Shinonome, Koto-ku, Tokyo No. 6 Inside the Shinonome Research Center of Oji Paper Co., Ltd. (72) Inventor Ma Suzuki 2-26-5 Nihonbashi-hamacho, Chuo-ku, Tokyo F-term in Japan Absorbent Technology Research Institute Co., Ltd. 3B029 BB02 BB05 4C098 AA09 CC08 CC15 DD05 DD06 DD10 DD25 DD26

Claims (10)

[Claims] 1. A diaper having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the top sheet and the back sheet. A skin contact sheet which is disposed at least at both ends in the longitudinal direction thereof and is joined to the top sheet or the back sheet; an opening formed in a portion of the skin contact sheet serving as a crotch region of a diaper; and surrounding the opening. A stretchable elastic member joined to the skin contact sheet in an extended state as described above. 2. The diaper according to claim 1, wherein at least four elastic members extend from a front body to a back body of the diaper and pass through the vicinity of the opening. 3. The skin contact sheet according to claim 2, wherein two sets of the elastic members are arranged so as to cross each other around the opening. Diapers. 4. At least two elastic members extend from one side edge of the front body of the diaper to the one side edge of the back body through the crotch region so as to sandwich the opening. At least two elastic members extend from the other side edge of the front body of the diaper to the other side edge of the back body through the crotch region so as to sandwich the opening. The diaper according to claim 1 or 2. 5. At least two elastic members extend from one side edge of the front body of the diaper to the other side edge of the front body through the crotch region so as to sandwich the opening. At least two elastic members extend from one side edge of the back body of the diaper to the other side edge of the back body through the crotch region so as to sandwich the opening. The diaper according to claim 1 or 2. 6. The diaper according to claim 1, wherein the elastic member is arranged so that tension acts substantially uniformly in a direction facing the opening. 7. The diaper according to claim 1, wherein a cutout portion is formed in a widthwise central portion of the skin contact sheet which is a front body region of the diaper. 8. The diaper according to claim 7, wherein the skin contact sheet is liquid-impermeable. 9. The diaper according to claim 1, wherein a second absorber is disposed on a portion of the skin contact sheet that is a front body region of the diaper. 10. The diaper according to claim 9, wherein the second absorber contains a mixture of a polymer absorbing member and microfibril cellulose, and is formed by coating on the skin contact sheet.