JP3129934B2 - Disposable diapers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper.

[0002]

2. Description of the Related Art Conventionally, disposable diapers having a liquid-absorbent core interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet are well known.

[0003]

In the conventional diaper, the core extends from the front body to the back body through the crotch region. Excretion penetrates through the topsheet and is absorbed by the core, but in the case of loose stool, even if excreted at the crotch area of the diaper or a part nearer to the back, it flows on the topsheet and moves to the front , Which may cause urinary and genital contamination, which is not hygienic.

According to the present invention, in the crotch region of the diaper, the core is divided into two parts and separated from each other, and a flap extending in the width direction of the diaper is formed at the separated part to prevent loose stool from flowing in the front body direction. That is the challenge.

[0005]

Means for solving the above problems The present invention is as follows to solve the above problems.

In the present invention, a disposable diaper having a liquid-absorbent core interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet and having a crotch region between a front body and a back body is assumed. I have to.

[0007] Under such a premise, the core is bisected in the crotch region in the front-rear direction and separated by a required distance, the front and back sheets are joined to each other at the separated portion, and the front and back sheets are joined to the front sheet at the separated portion. The present invention is characterized in that a flap extending in the diaper width direction is formed.

[0008] In one embodiment of the present invention, the flap comprises a pair of flaps parallel to each other and spaced apart in the front-rear direction of the diaper, one of which is closer to the front body and the other is closer to the rear body. is there. Also, in another one, a barrier cuff extending in the front-rear direction on both left and right sides of the upper surface of the diaper and having a propensity to stand up from the upper surface is formed, and the barrier cuff is tilted inward into the diaper, and the cuff inner surface is Some of the flaps are joined. Furthermore, the one flap inclines to the front body side and the other flap inclines to the back body side, so that each flap is opened together with the top sheet in each of the front and rear directions of the diaper. Is formed. In these embodiments, each of the flaps may have an elastic member extended along its free edge extending in the diaper width direction.

[0009]

[Function] In the disposable diaper constructed as described above, the absorbent core is divided into two parts in the crotch region and is separated by a required distance, so that the bodily fluid absorbed in the back body part of the core reaches the front body. Does not spread. The flap extending in the width direction of the diaper formed at the separated portion can reliably block, for example, loose stool flowing from the back body to the front body of the diaper, thereby preventing urine and soiling of the genitals.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the disposable diaper according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a partially cutaway perspective view of the diaper 1, in which the front-rear direction of the diaper 1 is slightly curved inward. The diaper 1 comprises a liquid-pervious topsheet 2, a liquid-impermeable back sheet 3 is composed of liquid-absorbent core 4 which, the front body 6
And the back body 7 and the inseam area 8 located between the both bodies 6 and 7
And the left and right side edges of the crotch region 8 are cut out in an arc shape. On the upper surface of the diaper 1, a barrier cuff 10 extending in the front-rear direction on both left and right sides, and second and third flaps 11, 1 separated in the front-rear direction in the crotch region 8 and extending in the left-right width direction.
There are two. The second flap 11 is located closer to the front body 6, and the third flap 12 is located closer to the rear body 7.
Tape fasteners 15 are attached to the left and right side edges of the back body 7. The elastic members 16 and 1 in the waist direction and the leg direction are respectively provided on the edge of the back body 7 and the side edge of the crotch region 8.
7, which are joined to at least one of the inner surfaces of the front and back sheets 2 and 3 in an extended state. Also,
First, second, third elastic members 18, 19, 20 are joined to the respective edges of the barrier cuff 10 and the second and third flaps 11, 12 in an extended state. The left and right side edges of the crotch region 8 including the leg elastic members 17 are first flaps 9 that can be closely attached to the wearer's legs.

FIG. 2 is a plan view of the back sheet 3 on which the core 4 is placed. The core 4 is formed of a front body core 4A and a rear body core 4B, each of which has a front end center portion facing each other and protrudes from the front end center portion toward each of the waist directions of the front and rear bodies. The cores 4 </ b> A and 4 </ b> B are joined to the upper surface of the back sheet 3 in a state where the cores 4 </ b> A and 4 </ b> B are separated by a distance L in the front-rear direction in the crotch region 8. The front and rear body cores 4A and 4B may be the same shape and the same size, but the portion 25 extending to the crotch region 8 of the rear body core 4B is moved closer to the front body 6 beyond a line (not shown) bisecting the diaper 1 back and forth. More preferably, there is. In the crotch region 8 on the upper surface of the back sheet 3,
A plurality of fourth elastic members 26 extending in the front-rear direction between the separated front and rear body cores 4A and 4B are joined in an extended state. Therefore, both cores 4A and 4B can approach each other.

FIGS. 3 and 4 are plan views of the diaper 1 and its I.
FIG. 4 is a view taken along line V-IV. The topsheet 2 has the same shape and the same size as the backsheet 3, and the portions extending from the peripheral edges of the front and rear body cores 4A and 4B are joined to each other. Barrier cuff 1
Numeral 0 is made of a rectangular nonwoven fabric. The outer edge 10A and the front and rear edges 10B and 10C are joined to the upper surface of the topsheet 2, but the inner edge 10D is not joined. Therefore, when the diaper 1 is curved as shown in FIG. 1, the first elastic member 18 contracts and the barrier cuff 10 rises, and the inner edge 10D is separated upward from the top surface of the top sheet 2 and the inside of the diaper 1 together with the top sheet 2. A pocket 28 opening toward the side is formed (see FIG. 1). Second and third flaps 11,
Reference numeral 12 denotes a single nonwoven fabric or a plastic film, and an intermediate portion 29 interposed between the two flaps 11 and 12 is joined to the topsheet 2 to form the second and third flaps 11 and 12.
Twelve proximal ends 11A and 12A are formed. Second and third
The flaps 11, 12 have respective upper end portions 11B, 12
It is bent in a Z-shaped cross section between B and the base ends 11A and 12A. The left and right sides 11C, 12C of the second and third flaps 11, 12 are located in the pocket 28, and the upper end 1
1B and 12B are joined to the inner surface of the first flap 10 by the hot melt adhesive 35. Further, the portions of the second and third flaps 11 and 12 that are bent and come into contact with the topsheet 2 are joined by a hot melt adhesive 36. Therefore, when the first flap 10 stands, the second and third flaps 11 and 12 are lifted up at the upper end portions 11B and 12B and open greatly toward the front body 6 and the rear body 7.
Three pockets 30, 31 can be formed (see FIG. 1). Upper ends 11B, 1 of the second and third flaps 11, 12
Since 2B has the second and third elastic members 19 and 20 in the extended state, when pulled up, it is in a tension state between the left and right barrier cuffs 10, and the pockets 30 and 31 can be reliably opened. Second and third flaps 11, 12
Since the height direction is bent in a Z-shape, the pockets 30, 31 are particularly deep. The barrier cuff 10 and the second and third flaps 11, 12 are preferably liquid-impermeable or liquid-impermeable, and more preferably gas-permeable and liquid-impermeable.

In the diaper 1 thus constructed, the second and third flaps 11 prevent the bodily fluid and loose stool excreted in the front body 6 or the back body 7 from flowing on the topsheet 2 and spreading to the opposite body. , 12 and prevent them from diffusing in the liquid-absorbent core and spreading to the opposite body, by the front and rear body cores 4A, 4B. Therefore, it is possible to solve the problem that loose stools flow to the front body and urine and genitals are soiled. Such diaper 1
Then, in order to simplify the structure, the crotch region 8 can have only one flap. At that time, it is preferable to adopt the third flap 12 which opens toward the back body 7 rather than the second flap 11, and particularly to prevent the flow of loose stool. Further, in order to further simplify the structure, the present invention can be implemented without the barrier cuff 10.

In the present invention, the barrier cuff 10 includes:
The same material as the second and third flaps 11 and 12 can be used. For the top sheet 2, the back sheet 3, and the core 4, materials known in the art can be used. In order to join the members, in addition to an adhesive technique using a hot melt adhesive or the like, a fusion technique for a hot-melt material can be used.

[0016]

In the diaper according to the present invention, the absorbent core is separated into two parts in the crotch region in the front and rear, and the left and right flaps are formed on the upper surface of the diaper. Alternatively, it is possible to prevent the excrement of the back body from flowing to the opposite body. Therefore, there is no loose stool flowing to pollute urine and genitals. When such flaps are joined to the inner side surfaces of the barrier cuffs formed on the left and right sides of the upper surface of the diaper, the pockets formed by the flaps are particularly large open, and it becomes easy to catch flowing loose stools and the like.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view of a diaper.

FIG. 2 is a plan view of a back sheet and an absorbent core.

FIG. 3 is a plan view of a diaper.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

[Explanation of symbols]

 Reference Signs List 1 diaper 2 top sheet 3 back sheet 4, 4A, 4B core 6 front body 7 back body 8 inseam area 10 barrier cuff 11, 12, second and third flaps 19, 20 second and third elastic members 30, 31 pocket

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61F 13/494 A61F 5/44 A61F 13/15

Claims (5)

(57) [Claims] 1. A disposable diaper in which a liquid-absorbent core is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and a crotch region is located between a front body and a back body. In the above, the core is bisected in the front-rear direction and is separated by a required distance, the front and back sheets are joined to each other at the separated portion, and the flap is joined to the top sheet at the separated portion and extends in the diaper width direction. Wherein the diaper is formed. 2. The diaper according to claim 1, wherein said flap comprises a pair of parallel flaps spaced apart in the front-rear direction of the diaper, one of which is closer to said front body and the other is closer to said rear body. . 3. A barrier cuff extending in the front-rear direction on the left and right sides of the upper surface of the diaper, and having a propensity to stand up from the upper surface, wherein the barrier cuff is tilted inward into the diaper so that the inner surface of the cuff has an inner surface. 3. The diaper according to claim 1, wherein a part of the flap is joined. 4. The one flap inclines to the front body side,
By tilting the other flap toward the back,
4. The diaper according to claim 2, wherein each flap forms a pocket which opens together with the topsheet in each of the front and rear directions of the diaper. 5. The diaper according to claim 1, wherein each of the flaps has an elastic member extended along a free edge extending in the diaper width direction.