JPH04242643A - Absorbent article - Google Patents

Abstract

PURPOSE:To provide an absorbent article having a convenient structure and facilitating the formation of a pocket. CONSTITUTION:First and second resilient members 9a, 9b, 10a, 10b which are laid on both longitudinal end sides of an absorbent article 1, respectively, so as to extend from a berry side part 8 to a backside part 7 by way of an inside leg part 6, are arranged so that the spaces therebetween become maximum in the inside leg part 6. Upon use of the article 1, a pocket part 16 projected outside of the body 5 is formed due to expansion and contraction of the first and second resilient members.

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 disposable diapers, used for infants, adults, menstrual use, and incontinent persons.

0002

2. Description of the Related Art Various leakage prevention mechanisms for the crotch portion of disposable diapers have been proposed. For example, Japanese Patent Publication No. 52-40267, Japanese Patent Publication No. 54-1
15939, JP 52-120045, and JP 57-89602, as shown in FIG. Disposable diapers have been disclosed in which gathers are provided on the wearer's crotch area to allow the diaper to adhere tightly to the wearer's crotch area to prevent leakage.

[0003] In addition, in recent years, Japanese Patent Application Laid-Open No. 62-25
No. 0201 and Japanese Unexamined Patent Publication No. 62-223303 disclose disposable diapers in which the side flaps of the disposable diaper are provided with side wall portions to form pocket portions, thereby improving the ability to accommodate excreta.

0004

[Problems to be Solved by the Invention] However, according to the former disposable diaper described above, although the gathers are formed by the elastic member, the pocket portion is not formed, so there is a problem that it lacks the ability to contain excrement. .

[0005] Furthermore, although the latter technique has a pocket portion, there is a problem in that the side wall portion of the side flap is required to form the pocket portion, which makes the structure complicated.

[0006] Accordingly, an object of the present invention is to provide an absorbent article having a simple structure and in which pocket portions can be easily formed.

[0007]

[Means for Solving the Problems] The present invention provides a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body disposed between these two sheets, and a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body disposed between these two sheets, and a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body disposed between these two sheets, and a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body disposed between these two sheets, and a liquid-impermeable top sheet, a liquid-impermeable back sheet, an absorbent body disposed between these two sheets, and a liquid-impermeable backsheet formed on both sides of the absorbent body in the longitudinal direction. It has a side flap extending outward in the width direction from the edge, and has a ventral part located on the ventral side of the wearer when worn, a dorsal part located on the back side of the wearer, and an inseam located in the crotch part. In the absorbent article, a pair of elastic members each consisting of a first elastic member and a second elastic member are disposed on both sides along the longitudinal direction of the absorbent article, and At least one of the elastic members is stretched in a curved manner from the ventral part to the dorsal part via the crotch part, and in a region surrounded by the first and second elastic members, the distance between the pair of elastic members is equal to the crotch part. The above object has been achieved by providing an absorbent article characterized in that the absorbent article is arranged such that the absorbent article has a maximum absorbent structure.

[0008]

[Function] According to the absorbent article according to the present invention, when worn, in the natural state, the main body forms gathers at the crotch area due to the elastic force of mainly one of the first and second elastic members. At the same time, the main body is curved into a U-shape, and the other elastic member causes a part of the crotch to protrude outward mainly due to its elastic force, thereby forming a pocket portion in the crotch.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. First, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. do. In this example, a disposable diaper will be used as an example of the absorbent article.

[0010] As shown in FIG. 1, a disposable diaper 1 includes:
A liquid-permeable top sheet 2 that forms the side that contacts the wearer's skin, a liquid-impermeable back sheet 3 that corresponds to the top sheet 2, and a sheet that absorbs excrement placed between these two sheets 2 and 3. The main body 5 includes an absorbent body 4 and an absorbent body 4.

The main body 5 is formed into an hourglass shape with a constriction at the center in the longitudinal direction (in the vertical direction in the figure), and a crotch portion 6 is formed at the constriction. The hourglass-shaped wide part has a dorsal part 7 located on the back side of the wearer, and the other wide part has a ventral part 8 located on the ventral side of the wearer.

First and second elastic members 9a, 9b and 10a are provided on both sides along the longitudinal direction of the diaper body.
, 10b are arranged, and these first and second elastic members 9a, 9b, 10
a and 10b extend from approximately the center of the abdominal part 8 to approximately the middle of the crotch part 6 and the dorsal part 7, and the first and second elastic members 9a, 9b and 10a, 10b are arranged at predetermined positions with respect to each other. They are separated by a distance L, but the distance L is maximum at the crotch area.

To explain the above-mentioned structure in more detail, the back side part 7 and the ventral side part 8 have waist flaps 11, 11 extending outward from the absorbent body 4 at both longitudinal ends of the main body 5, respectively. A pair of left and right side flaps 12, 12 are formed outside the absorbent body 4 in the width direction. The side flaps 12 include dorsal side flaps 12a, 12a located on the back side, ventral side flaps 12b, 12b located on the ventral side, and crotch side side flaps 12c.
, 12c.

A pair of tape fasteners 14 are arranged in parallel outwardly in the width direction of the absorbent body 4 on each of the left and right pair of side flaps 12a, 12a formed on the back side portion 8. The fastener 14 is fixed to a target tape 15 provided on the ventral side 7 of the backsheet 3.

First and second elastic members 9a, 9b, 10a
, 10b are stretched between the top sheet 2 and the back sheet 3 and are overlapped. The first elastic member 9a among the first and second elastic members 9a, 9b, 10a, 10b
, 9b form the inner side of the crotch portion 13, and the second elastic members 10a, 10b form the outer side. Note that "inside" means the direction toward the longitudinal center line of the diaper 1, and "inside" means the direction toward the longitudinal center line of the diaper 1.
"Outer" means in a direction away from the longitudinal centerline. When worn, the first elastic members 9a, 9b and the second
As shown in FIG. 2, the elastic members 10a and 10b
A pocket portion 16 is formed in the diaper body 5.

[0016] The top sheet 2 and the back sheet 3
are preferably substantially the same length, but either one may be formed longer.

First and second elastic members 9a, 9b, 10a
, 10b, the first elastic members 9a, 9b are attached to the crotch area 6
, they are arranged in a curved manner so as to protrude inward so that the distance between them is the narrowest. On the other hand, the second elastic members 10a and 10b are arranged in a linear shape. It should be noted that the first elastic members 9a, 9b are arranged between the absorbent body 4 and the top sheet 2 where the distance between the first elastic members 9a, 9b is the shortest.

First and second elastic members 9a, 9b, 10a,
10b intersect with each other at the ventral side part 8 and the dorsal side part 7, and surround a part of the crotch area. As shown in FIG. 2, the portion surrounded by the first and second elastic members 9a, 9b, 10a, and 10b protrudes outward to form the pocket portion 16 in the natural state.

In the embodiment, the first and second elastic members 9a
, 9b, 10a, and 10b are shown as string-like elastic members, but there is no limitation on whether they are tape-like elastic members or flat rubber. The material of the elastic member is 150
It is particularly preferable that the stress at the time of percent elongation is 100 grams or less, but there is no particular limitation as long as it has stretchable elasticity, and water-absorbing and shrinkable fibers may also be used.

First and second elastic members 9a, 9b, 10a
, 10b, any method known in the industry can be used for joining and bonding between the top sheet 2 and back sheet 3, and is not limited to hot melt adhesives.
Various methods can be used, such as ultrasonic welding and heat welding.

Although not shown, a third elastic member may be provided in tension in the width direction of the waist flaps 11, 11.

On the other hand, the top sheet 2 is preferably a liquid-permeable sheet that allows excrement to pass through to the absorbent body 4 and has a feel similar to underwear. Such a liquid-permeable sheet may be made of, for example, a woven fabric. , nonwoven fabric, porous film, etc. are preferred. Also, by applying a hydrophobic compound such as a silicone oil or paraffin wax to the peripheral edge of the top sheet 2, or by applying a hydrophilic compound such as an alkyl phosphate ester in advance and washing the peripheral edge with warm water. Water-repellent treatment can be applied to prevent leakage due to urine, etc. seeping around the periphery.

The back sheet 3 may be made of a moisture-permeable, liquid-impermeable sheet that is made by adding a filler to a thermoplastic resin and stretched to allow steam to pass through, or a material that has a feel similar to underwear, such as a film and a water-repellent non-woven fabric. or a composite material of a film and a water-repellent fabric.

[0024] The absorbent material 4 is preferably one whose main material is defibrated pulp, in combination with a high-molecular water-absorbing polymer, or a heat-treated mixture of a thermoplastic resin, cellulose fiber, or a high-molecular water-absorbing polymer. . The water-absorbing polymer may be present in any of the upper layer, middle layer, and lower layer, and may be mixed with the pulp. The high-molecular water-absorbing polymer is preferably in the form of particles that have the ability to absorb and retain liquid of 20 times or more its own weight and have the property of gelling. Preferred are starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, crosslinked sodium carboxymethyl cellulose, acrylic acid (salt) polymers, and the like. The shape is preferably an hourglass shape that matches the body shape of the wearer, but it may also be rectangular.

Next, the operation of this embodiment will be explained.

When wearing the disposable diaper 1 according to this embodiment, as shown in FIG.
After placing the dorsal part 8 of the wearer on the back side of the wearer, placing the ventral part 8 on the ventral side and the crotch part 6 on the crotch, the tape fastener 14,
14 is attached and fixed to the target tape 15 on the abdominal part 8.

On the other hand, in the natural state of the disposable diaper 1, the first and second elastic members 9 are arranged in a stretched state.
a, 9b, 10a, and 10b contract in the longitudinal direction, and the diaper 1 curves toward the top sheet 2 to fit the shape of the wearer. Furthermore, since the first elastic members 9a, 9b are arranged in a curved manner, they also contract in the width direction, and at the same time as the diaper main body curves, the first and second elastic members 9a, 9b, 1
0a and 10b, a pocket portion 16 as shown in FIG.
form.

The pocket portion 16 is formed to protrude outside the diaper body 5, and holds urine and feces excreted by the wearer outside the excretion point (portion where excrement is excreted). A part or all of the retained excrement is absorbed by the absorbent body 4 disposed in the pocket portion 16. Therefore, this pocket portion 16 is also effective against so-called sudden urination, in which a large amount of urine is suddenly and instantaneously excreted at night.

It is preferable that the pocket portion 16 is formed to cover both sides of the excretion point, but specifically, when urine is the main point, the pocket portion is formed in the crotch area 6 for women. It is the center, and for men, the ventral part 8 of the crotch 6.
Close to you. The positions of this pocket formation are the first and second pockets.
can be easily changed by changing the installation position or arrangement shape of the elastic members 9a, 9b, 10a, 10b, and such type of manufacturing changes in the manufacturing process are easy.

Next, another embodiment of the present invention will be described with reference to FIG. 3 of the accompanying drawings.

In a disposable diaper 21 according to another embodiment shown in FIG. 3, the second elastic members 10a and 10b are arranged in a curved shape protruding outward in the crotch area 6, and the first and second elastic members An auxiliary absorbent body 22 is arranged between 9a, 9b and 10a, 10b. This auxiliary absorber 2
2 is made of the same material as the main absorbent body 4 and is formed separately from the main absorbent body 4.

Since the other parts are the same as those in the above-described embodiment, the same reference numerals are given to the same parts as in the above-described embodiment, and a detailed explanation of the parts will be omitted.

According to another embodiment of the present invention, by arranging the auxiliary absorbent body 22, the absorption and retention power of the pocket can be increased, and the auxiliary absorbent body 22 is separate from the main absorbent body 4. Since the first elastic member 9
a, 9b can easily and reliably form the pocket portion 16 without being affected by the rigidity of the main absorbent body 4.

The present invention is not limited to the above-mentioned embodiment, but can be modified in various ways without departing from the gist of the present invention.

For example, the first or second elastic members 9a, 9
b, 10a, 10b are not limited to being arranged in a curved shape,
Other shapes such as trapezoids may be used as long as the distance between the first and second elastic members is maximum at the crotch area.

[0036] Further, the elastic members may include at least one pair of elastic members 9a, 9b, 10a, 10b, and a configuration in which other elastic members may be arranged is also possible.

[0037]

According to the absorbent article of the present invention, pockets can be easily formed with a simple structure. Furthermore, the pocket portion formed in the crotch portion accommodates excrement, thereby exhibiting a leakage prevention effect against sudden urine, loose stool, etc. Since the absorbent body is slightly wrinkled by the inner elastic member, the absorption area increases, and the amount of absorption in the crotch area adjacent to the excretion point can be improved. 1st
By simply changing the arrangement of the second elastic member, a pocket portion having a desired shape can be easily formed at a desired position. Since the pocket portion can be provided to protrude on the side opposite to the body, the pocket portion is less likely to collapse.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of a disposable diaper which is an embodiment of the absorbent article of the present invention.

FIG. 2 is a perspective view showing the disposable diaper shown in FIG. 1 in its natural state.

FIG. 3 is a plan view of a disposable diaper according to another embodiment of the present invention.

FIG. 4 is a plan view of a conventional disposable diaper.

[Explanation of symbols]

1, 21 Disposable diapers 2 Top sheet 3 Back sheet 4 Absorber 6 Lower crotch 7 Dorsal part 8 Ventral part 9a, 9b First elastic member 10a, 10b Second elastic member

Claims (4)

[Claims] Claim 1: A liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body disposed between these two sheets, and a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body disposed between these two sheets, and an absorbent body extending outward in the width direction from both longitudinal edges of the absorbent body. A ventral part that has an extended side flap and is located on the ventral side of the wearer when worn, and a dorsal part that is located on the dorsal side of the wearer.
In an absorbent article that is divided into a crotch area located in the crotch area, a pair of elastic members each consisting of a first elastic member and a second elastic member are disposed on both sides along the longitudinal direction of the absorbent article, At least one of the pair of elastic members is stretched in a curved manner from the ventral side through the crotch to the dorsal side, and in a region surrounded by the first and second elastic members,
An absorbent article characterized in that the distance between the pair of elastic members is maximized in the crotch region. 2. The absorbent material according to claim 1, wherein the first and second elastic members are maximally separated approximately at the center of the crotch area and intersect with each other on the dorsal side and the ventral side. Goods. 3. The absorbent article according to claim 1, wherein one of the first and second elastic members is arranged in a straight line. 4. The absorbent article according to claim 1, wherein at least one of the first and second elastic members is disposed on the absorbent body.