JPH03218752A - disposable diaper - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disposable diaper having a leak-proof structure with improved fit. [Prior Art] Various leakage prevention mechanisms for the crotch portion of disposable diapers have been conventionally proposed. For example, Tokuko Sho 52-40
No. 267, JP-A-54-1-15939, JP-A-52-120045, and JP-A-57-89
Publication No. 602 discloses that gathers are provided in advance along the side edges of a disposable diaper using an elastic member, so that the diaper is brought into close contact with the wearer's crotch area, and the disposable diaper is tightly sealed to prevent leakage. Disclosed. Also, JP-A-59-15730
No. 1, Japanese Unexamined Patent Publication No. 60-199903, and Japanese Utility Model Application No. 63-60405 disclose that a plurality of elastic members with different elongation rates are arranged on the side edges to fit the circumference of the wearer's legs. Disclosed is a diaper that can be used as a pair and can follow the movements of the diaper. Furthermore, in JP-A-62-250201 and JP-A-63-159501, side walls or standing elastic gathers are formed in the longitudinal direction of the side flaps, thereby preventing leakage and improving fit. A disposable diaper is disclosed.

[Problem to be solved by the invention]

However, in the leakage prevention mechanism as mentioned above,
No. 40267, Japanese Patent Application Laid-open No. 115939/1983,
JP-A-52-120045 and JP-A-57-89
Disposable diapers with gathers on the side flaps in the crotch area described in Publication No. 602 are as follows:
The elastic members interposed in the side flaps increase the rigidity of the side flaps, reducing the ability to follow around the legs. As a result, the intended fit cannot be obtained, and there is a risk that a gap will be formed between the wearer's crotch and the diaper, making it impossible to sufficiently prevent leakage. In particular, when the wearer is an active elderly child, there is a risk that the absorbent material will often twist or the diaper will slip off when worn, further increasing the risk of leakage.
Furthermore, most of the diapers in which an elastic member is interposed between the top sheet and the back sheet to form gathers are provided with adhesive means on the elastic member, back sheet, or top sheet, and at both ends of the diaper in the longitudinal direction. There is a non-bonded part (separated part) that is unavoidably formed during manufacturing, and this causes leakage from the ventral or dorsal side through the gap formed at this separated part when worn. ．． Also, JP-A-59-157301, JP-A-60-1999
In the diapers described in Japanese Utility Model Publication No. 03 and Japanese Utility Model Application Publication No. 63-60405, in which each side flap is provided with one erect gather, the elongation rate of the elastic member must be set high in order to make the gather erect. If you do this, the gathered edge will come into contact with your skin in a linear manner, which may put pressure on the crotch area, causing redness or damage to the crotch area, making it not necessarily comfortable to wear. , the same can be said of those having side walls.

Therefore, an object of the present invention is to provide a disposable diaper that can flexibly fit the crotch area and reliably prevent leakage without creating a gap, and can also prevent leakage at the waist area. There is a particular thing.

(Means for Solving the Problems) As a result of extensive research into the leakage prevention mechanism of conventional disposable diapers, particularly in the crotch area, the inventors have achieved the above object by providing a specific form of leakage resistance member in the flap. I found out that it can be achieved.

The present invention is a disposable diaper made based on the above findings, that is, a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body located between these two sheets, and a longitudinal direction of the absorbent body. In a disposable diaper comprising side flap knobs extending outward in the width direction from both side edges in the direction,
The present invention provides a disposable diaper characterized in that a plurality of elastically formed pleats are provided on the surface of the side flap along the absorbent body. [Function] According to the disposable diaper of the present invention, the elastic pleats of the side flaps allow the diaper to be worn without being affected by the twisting of the absorbent material that follows the active movements of older children. The crotch part of the wearer is flexibly fitted to form a bokento structure inside the crotch part, and while this pogento structure is maintained, it fits the wearer and seals excrement within the bokento structure. Leakage can be prevented.

In addition, according to the pair disposable diaper of the present invention, since each of the pleats includes a plurality of elastic members, the folds flexibly fit around the wearer's crotch area when worn, causing the crotch area to turn red. There is nothing to do or hurt.

〔Example〕

The present invention will be explained below based on the embodiments shown in FIGS. 1 to 7. In each figure, FIG. 1 is a partially cutaway plan view of the surface of an embodiment of the disposable diaper of the present invention, and FIG. 2 is a plan view showing the surface of the disposable diaper shown in FIG. A perspective view showing a state curved to the side, FIG. 3 is a cross-sectional view taken along the line ■--■ in FIG. 2, FIG.
The figures are equivalent to FIG. 3 showing other embodiments of the disposable disposable diaper of the present invention, and FIG. 7 is a view on the opposite side from FIG. It is a sectional view at a position.

The disposable diaper l of this example is as shown in Fig. 1.
A liquid-permeable front sheet 2 forming the side that contacts the wearer's skin, a liquid-impermeable back sheet 3 corresponding to the front sheet 2, and the back sheet 3. An absorbent body 4 that is located between the top sheet 2 and absorbs excrement, and a pair of side flanges 5, 5 that extend outward in the width direction from both sides of the absorbent body 4 in the longitudinal direction. and the side flaps 5, 5.
is integrally formed by overlapping the front sheet 2 and the back sheet 3. In this embodiment, recessed portions 5A, 5A are formed approximately in the center of the outer edges of the side flaps 5, 5, following the shape of the crotch portion.

Further, a leak resistance member 6 having a pair of folds 6A, 6A extendably formed on the surface of the side flap 5.
are provided along the longitudinal side of the absorbent body 4, and the leak resistance member 6 is formed to extend from the side flap 5 to the inside of the absorbent body 4 and cover it. The fold portion 6A includes at least one thread-like elastic member 7, and is configured to be expandable and contractible in the longitudinal direction. That is, the present disposable disposable diaper 1 is in the unfolded state as shown in FIG. Ori,
When the present pair disposable diaper 1 is used, as shown in FIG. Folds 6A, 6 of each leak resistance member 6, 6
It is configured to form a pocket structure in the crotch area at A,
Moreover, the folds 6A, 6A on the inside of each leak resistance member 6, 6 are configured to be located inside the absorbent body 4, as shown in FIG.

In addition, the side flap 5 on the back side of the real pair diaper 1,
Tape fasteners 8, 8 are attached to 5.

Next, the leak resistance member 6 will be explained in more detail based on FIGS. 3 and 4.

The absorbent body 4 is fixed on the back sheet 3, the entire absorbent body 4 is covered and bonded with the top sheet 2, and the side of the absorbent body 4 in the longitudinal direction with respect to the top sheet 2 is The leak resistance member 6 along the edge forms a fixing portion 9 with a constant width in the longitudinal direction, and is bonded to form a free edge at the side edge of the leak resistance member 6 in the longitudinal direction. The elastic member 7 is enclosed in a bent portion formed by bending the free end edge toward the surface sheet 2 side, thereby forming the folded portion 6A. The leak resistance member 6 is fixed to the surface sheet 2 by adhesion using an adhesive such as hot melt, or by thermal welding using ultrasonic waves, but in order to improve the feel when worn, is preferably fixed by ultrasonic thermal welding.

Further, as shown in FIG. 4, the elastic member 7 reaches only the vicinity of both ends of the leak resistance member 6 in the longitudinal direction, and the leak resistance member 6 Both edges in the longitudinal direction are bent as described above, and are fixed to the top sheet 2 so as to form a plurality of fixing parts 9 inside thereof. That is, the folds 6A,
6A is formed mainly in the crotch region.

Further, the fixing part 9 of the leak resistance member 6 may be installed anywhere within the side flap 5, but from the viewpoint of setting an effective pocket structure and ease of mounting, the fixing part 9 may be placed in the longitudinal direction of the absorber 4. It is preferably within 50iIIIl outward from the side edge, and more preferably within 30m. Moreover, it is preferable that the width of the fixing part 9 is formed to be 3 to 20 mm.

The pleats 6A, 6A each have a length of 10 in the width direction.
~100m is preferable, more preferably inner fold part 6A
is approximately 35 mn, and the outer fold portion 6A is approximately 15 wm.

The front sheet 2 is made of a fiber nonwoven fabric, a porous plastic film, etc., the back sheet 3 is made of a moisture permeable plastic film, etc., and the leak resistance member 6 is made of a material such as a moisture permeable plastic film. Similar to 2, the absorbent body 5 is made of fibrous nonwoven fabric, porous plastic film, etc.
It is preferable that the elastic member 7 is formed of a belt-shaped or thread-shaped polyurethane film or a stretchable elastic member such as natural rubber. Further, the surface sheet 2 is preferably formed of a hydrophilic material, and the leak resistance member 6 is preferably formed of a water-repellent material.

Since the pair disposable diaper 1 of this embodiment is configured as described above, when wearing this, the pair disposable diaper 1 is configured as follows.
The surface sheet 2 is formed by the elastic members 7, 7 of the pleats 6A, 6A.
The folds 6A, 6A rise up to form a three-dimensional gather (see Fig. 1). When the diaper 1 is attached to the waist with tape fasteners 8, 8 and worn in this state, the side flaps 5
, 5 surround the crotch portion, and the pleats 6A, 6A fit flexibly to the crotch portion to form a pocket structure in the crotch portion and seal the inside from the outside. At this time, since the pleats 6A, 6A flexibly seal the wearer's crotch area with a flat surface, the crotch area will not be reddened or damaged.

In addition, the zero-use diaper 1 has an elastic member 7 as in the past.
Since the front sheet 2 and the back sheet 3 are not interposed between the front sheet 2 and the back sheet 3, the front sheet 2 and the bottom sheet 3 forming the side flaps 5, 5 are in close contact with each other and there is no gap. This makes it possible to reliably prevent leakage from the waist.

In addition, the present pair disposable diaper 1 has basic performance in terms of leakage and fit, and is also visually excellent for consumers.

In addition, according to the present disposable diaper 1, the folds 6A, 6A forming the three-dimensional gathers can be fixed by simply gluing them to predetermined positions on the surface of the disposable diaper 1.
When producing this, the process is simple, high-speed production is possible, and production efficiency can be improved.

Further, FIG. 5 shows another embodiment of the present invention, and the pair diaper 1 of this embodiment has folds 6 as shown in the figure.
The structure is similar to that of the above-mentioned tiger embodiment except that A and 6A are formed as planar portions having a predetermined width by enclosing two thread-like elastic members 7.

The folds 6A, 6A are used for the actual pair of diaper l.
stands up in a curved state, and the inner pleats 6A are located above the surface sheet 2 covering the absorbent body 4 and located inside the longitudinal side edges of the absorbent body 4. There is. Further, the elongation rate of the elastic member 7 on the side closer to the fixing part 9 is set to be larger than the elongation rate of the elastic member on the far side among the elastic members 7, 7 of the inner pleat 6A, and The elastic members 7, 7 of 6A are also configured such that the side closer to the fixing part 9 has a larger elongation rate than the side farther away.

Moreover, it is preferable that the planar part of the said pleat part 6A is formed in 5-20 m, More preferably, it is about 108 m. In addition, when the elastic member 7 is formed of a single band-like member, it is sufficient that the width thereof in the free state forms a planar portion of the above-mentioned width. According to No. 9 disposable diaper 1, folds 6A, 6A
The flat part fits the crotch area to more reliably prevent leakage of excrement.

Further, FIG. 6 shows still another embodiment of the present invention,
As shown in the figure, the pair disposable diaper 1 of this embodiment is similar to the pair disposable diaper 1 of the first embodiment shown in FIGS. 1 to 4.
The structure is similar to that of the first embodiment except that another leak-resistant member 6' is bonded to the leak-resistant member 6 so as to form a fixed portion 9' on the surface of the leak-resistant member 6. ing.

Another leak resistance member 6' is as shown in FIG.
The width of the elastic member 7 is set to be narrower than that of the leak resistance member 6, and the elongation rate of the elastic member 7 is set to be thicker than that of the other elastic member 7. fold part 6
It is configured to stand up more than A.

Therefore, according to the disposable diaper l of this embodiment, two three-dimensional gathers are formed that slope toward the inside of the absorbent body 4, and these gathers extend from the wearer's crotch area, inguinal area, to thigh area. Fit more securely.

FIG. 7 is a diagram showing still another embodiment of the present invention, and as shown in FIG. The outer side thereof is formed by a leak resistance member 6, and an elastic member 7 is provided only on the inner edge of the leak resistance member 6, and the elastic member 7 is provided on the surface of the leak resistance member 6 as shown in FIG. Similarly, another leak resistance member 6° is provided. Therefore, according to this embodiment, two three-dimensional gathers are formed that are inclined toward the inside of the absorbent body 4, and the same effects as in the third embodiment can be expected.

In addition, in the pair diapers 1 of each of the above embodiments, only the case where each absorbent body 4 has a rectangular shape has been described, but these absorbent bodies 4 have a concave notch in each of the side flaps 5, 5. 5A and 5A, the fit can be further improved.

Further, in the disposable disposable diaper 1 of each of the above embodiments, both ends of each absorbent body 4 in the longitudinal direction are covered with the respective back sheets 3 or with another leak-proof sheet, and the waist area is further covered. By providing the elastic member, leakage in the waist region can be more effectively prevented.

[Effects of the Invention] The disposable diaper of the present invention can flexibly fit the crotch area without creating a gap, and can reliably prevent leakage, as well as prevent leakage in the waist area. It is something.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view of the surface of an embodiment of the disposable diaper of the present invention, and FIG. 2 shows a state in which the disposable diaper shown in FIG. 1 is curved toward the surface side. A perspective view, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 2, and Fig. 4 is a rV in Fig. 2.
-TV line sectional view, FIG. 5, and FIG. 6 are views corresponding to FIG. 3 and FIG. 7 showing other embodiments of the pair diaper of the present invention.
This figure is a cross-sectional view at a position opposite to that of FIG. 3, showing still another embodiment of the disposable diaper of the present invention. l; Disposable diaper 2; Front sheet 3; Back sheet 4; Absorbent material
5; Side flaps 6, 6; Leak resistance member 6A, 6''A; Fold portion 7, 7゛; Elastic member

Claims (3)

[Claims] (1) A liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body located between these two sheets, and sides extending outward in the width direction from both longitudinal edges of the absorbent body. 1. A disposable diaper comprising a flap, characterized in that a plurality of stretchable pleats are provided on the surface of the side flap along the absorbent body. (2) The disposable diaper according to claim (1), wherein at least a portion of each of the pleats in the longitudinal direction is formed so as to be spaced apart from the topsheet. (3) The disposable diaper according to claim (1), wherein each of the pleats includes a plurality of elastic members.