JP3096285B2 - Diaper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diaper having a leak-proof structure with improved fit.

[0002]

2. Description of the Related Art Various leak-proof mechanisms for the crotch portion of a diaper have been conventionally proposed. For example, JP-B-52-40267, JP-A-54-11593.
No. 9, JP-A-52-120045, and JP-A-57-89602 provide gathers in advance using elastic members along the side edges of the diaper,
There is disclosed a diaper using a diaper in which a diaper is closely attached to a crotch portion of a wearer and is made hard to leak. Also, Japanese Unexamined Patent Publication No.
JP-A-157301, JP-A-60-199903 and JP-A-63-60405 disclose that a plurality of elastic members having different elongation rates are arranged on a side edge portion so as to reduce a dimension around a leg of a wearer. A disposable diaper that can fit and follow a movement is disclosed.

[0003] Also, Japanese Patent Application Laid-Open No. 62-250201,
Japanese Unexamined Patent Publication (Kokai) No. 63-159501 discloses a diaper in which a side wall portion or an upright stretch gather is formed in the longitudinal direction of a side flap to prevent leakage and improve fit.

[0004]

However, in the above-described leakage prevention mechanism, Japanese Patent Publication No. 52-40267, Japanese Patent Application Laid-Open No. 54-115939, and Japanese Patent Application Laid-Open No. 52-1200
No. 45 and Japanese Unexamined Patent Publication No. 57-89602 each disclose a diaper provided with gathers on the side flaps at the crotch portion, the rigidity of the side flaps is increased by an elastic member interposed between the side flaps, The ability to follow the legs is reduced. As a result, the intended fit cannot be obtained, and a gap may be formed between the crotch portion of the wearer and the diaper, and leakage cannot be sufficiently prevented. In particular, when the wearer is an active high-month-old baby, the absorber may frequently be dislodged or the diaper may slip off when worn, which further increases the risk of leakage.

[0005] Further, most of the gathers in which an elastic member is interposed between the top sheet and the back sheet to form a gather are provided with the elastic member or the back sheet or the top sheet provided with bonding means, and both ends in the longitudinal direction of the diaper. The part has a non-joining part (peeling part) which is unavoidably formed in manufacturing, which causes leakage from the abdomen or back through the gap formed in the peeling part when worn. Was.

[0006] Also, Japanese Patent Application Laid-Open No. 59-157301,
JP-A-60-199903 and JP-A-63-60
No. 405, the diaper provided with one upright gather in the side flaps is forced to set a high elongation rate of the elastic member in order to erect the gather. Because it comes into linear contact with the skin, it presses the crotch with gathers, which may make the crotch red or hurt, which is not always satisfactory in terms of wearing, and also applies to those with side walls I can say that.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a diaper for a diaper capable of flexibly fitting to a crotch portion to reliably prevent leakage without creating a gap and to prevent leakage at a waist. Is to provide.

[0008]

Means for Solving the Problems The present inventors have conducted intensive studies on a conventional diaper, particularly a leak-proof mechanism for a crotch portion, and as a result, provided the flap with a specific form of leak-resistant member. It has been found that this can be achieved. The present invention has been made based on the above findings, and includes a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorber located between these sheets, and both side edges in the longitudinal direction of the absorber. In a diaper provided with side flaps extending outwardly in the width direction from the side, the folds formed on the surface of the side flaps so as to be extendable and contractible are provided.
Of which respectively provided in plural along a side edge, the plurality of the fold portion, the comprehensive than each one place Saidofu
A diaper which is fixed to the surface of the wrap , and wherein the plurality of folds are separately raised from the surface of the side flap. is there.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in FIGS. In each of the figures, FIG. 1 is a plan view showing a part of the surface of an embodiment of the diaper of the present invention, which is cut away, and FIG. 2 is a diagram showing the diaper shown in FIG. FIG. 3 is a sectional view taken along line III-III of FIG. 2, FIG. 4 is a sectional view taken along line IV-IV of FIG. 2, FIG. 5 and FIG. FIG. 3 is a diagram corresponding to FIG. 3 showing another embodiment of the diaper diaper of the present invention, and FIG. 7 is a cross-sectional view at a position opposite to FIG. 3 showing another embodiment of the diaper diaper of the present invention. is there.

As shown in FIG. 1, a diaper 1 according to the present embodiment has a liquid-permeable top sheet 2 forming a side in contact with the wearer's skin and a liquid diaper corresponding to the top sheet 2. A permeable back sheet 3, an absorber 4 located between the back sheet 3 and the top sheet 2 for absorbing excrement, and outwardly in the width direction from both longitudinal edges of the absorber 4 It has a pair of extended side flaps 5,5, and the side flaps 5,5 are formed integrally with the top sheet 2 and the back sheet 3 by polymerization. In the present embodiment, concave notches 5A and 5A are formed substantially at the center of the outer edges of the side flaps 5 and 5 along the shape of the crotch portion.

The folds 6A, 6A formed on the surfaces of the side flaps 5, 5 so as to be extendable and contractible are provided on both sides of the absorber 4 .
And each provided in plural along a rim, the plurality of pleats portions 6A, 6 A, side by collectively in one place each flat
It is fixed to the surface of the flops 5,5, and a plurality of fold portion 6
A and 6A are separated from the surface of the side flap 5, respectively.
And stand up. More specifically, a leakage resistance member 6 having a pair of folds 6A, 6A formed on the surface of the side flap 5 is provided along a longitudinal side edge of the absorber 4, Moreover, the leakage resistance member 6 is formed so as to cover from the side flaps 5 to the inside of the absorber 4. The fold 6A includes at least one thread-like elastic member 7 and is configured to be stretchable in the longitudinal direction. That is, the diaper 1
Is in the unfolded state as shown in FIG.
In the state where the diaper 1 is stretched, the diaper 1 is constantly pulled inward in the longitudinal direction. When the diaper 1 is used, as shown in FIG. Are curved toward the surface side, and the folds 6A, 6A of the respective leak resistance members 6, 6 rise, and the folds 6A, 6A of the respective leak resistance members 6, 6, form a pocket structure at the crotch. In addition, the folds 6A, 6A inside the respective leak resistance members 6, 6 are arranged inside the absorber 4 as shown in FIG.

Incidentally, tape fasteners 8, 8 are attached to the side flaps 5, 5 on the back side of the diaper 1 of the present invention.

According to the diaper of the present invention, the elastic folds of the side flaps when worn can be worn without being affected by the deformation of the absorber that follows the active movement of the old-aged child. Fits the crotch of the wearer flexibly, forms a pocket structure inside the crotch, fits the wearer while maintaining this pocket structure, seals the excrement in the pocket structure and prevents leakage. Can be prevented.
In addition, according to the diaper of the present invention, since each of the folds is provided with a plurality of elastic members, it fits flexibly to the wearer's crotch portion when worn, and makes the crotch portion red. Does not hurt.

Next, FIG. 3 and FIG.
This will be described in more detail with reference to the drawings. The absorber 4 is fixed on the back sheet 3, the entirety of the absorber 4 is covered and adhered by the top sheet 2, and is aligned with the top sheet 2 along the longitudinal side edge of the absorber 4. The leak resistance member 6 is adhered so as to form the fixed portion 9 with a constant width in the longitudinal direction and to form a free edge at a longitudinal side edge of the leak resistance member 6. That is, the plurality of folds 6A are:
Each of them rises from the fixed part 9 gathered in one place . The elastic member 7 is included in a bent portion formed by bending the free edge toward the top sheet 2 and constitutes the fold 6A. The leakage resistance member 6 is fixed to the topsheet 2 by bonding with an adhesive such as hot melt, or by heat welding using ultrasonic waves. However, in order to improve the feeling when worn, Fixation by ultrasonic thermal welding is preferred.

As shown in FIG. 4, the elastic member 7 has reached only to the vicinity of both ends in the longitudinal direction of the leakage resistance member 6, and the vicinity of the both ends which do not include the elastic member 7 has the leakage resistance. The both side edges in the longitudinal direction of the member 6 are bent as described above, and are fixed to the top sheet 2 so as to form a plurality of fixing portions 9 inside thereof. That is, the folds 6A, 6A are formed around the region of the crotch portion.

The fixing portion 9 of the leak resistance member 6 is
It may be installed anywhere as long as it is inside the side flap 5, but from the viewpoint of effective pocket structure setting and mounting
It is preferably within 50 mm outward from the longitudinal side edge of the absorber 4, more preferably within 30 mm. Further, it is preferable that the width of the fixing portion 9 is formed to be 3 to 20 mm. Each of the folds 6A, 6A preferably has a length in the width direction of 10 to 100 mm, more preferably, the inner fold 6A is about 35 mm, and the outer fold 6A is about 15 mm.

The top sheet 2 is made of a fibrous non-woven fabric, a porous plastic film or the like, the back sheet 3 is made of a moisture-permeable plastic film or the like, and the leakage resistance member 6 is made of the same material as the top sheet 2. With a nonwoven fabric, porous plastic film, etc.
The absorbent 5 is made of a material obtained by using a defibrated pulp as a main material and an absorbent polymer in combination, and the like.
Is preferably formed of a stretchable elastic member such as a belt-like or thread-like polyurethane film or natural rubber. Further, the topsheet 2 is preferably formed of a hydrophilic material, and the leak resistance member 6 is preferably formed of a water-repellent material.

Since the diaper 1 of this embodiment is constructed as described above, when the diaper 1 is worn, the diaper 1 is attached to the topsheet 2 by the elastic members 7, 7 of the folds 6A, 6A. The fold 6A is pulled and curved within the fold 6A,
6A rises to form a three-dimensional gather (see FIG. 1). When the diaper 1 is worn on the waist by fastening to the waist by the tape fasteners 8 and 8 in such a state, the concave notches 5A and 5A of the side flaps 5 and 5 surround the crotch portion and the folds 6A and 6A It fits flexibly in the inseam and forms a pocket structure in the inseam to seal the inside from the outside. At this time, since the folds 6A and 6A flexibly seal the wearer's crotch portion with a flat surface, the crotch portion is not turned red or damaged. Further, since the present diaper 1 does not have an elastic member 7 interposed between the topsheet 2 and the backsheet 3 as in the prior art, the topsheet 2 and the backsheet 3 forming the side flaps 5,5 are formed. And there is no gap, and leakage from the waist can be reliably prevented.

In addition, the present diaper 1 has basic performance of leakage and fit and is visually excellent for consumers. In addition, according to the book diaper 1, the folds 6 forming a three-dimensional gather are provided.
A and 6A can be fixed simply by bonding them to a predetermined position on the surface of the diaper 1 by using the A and 6A. Therefore, when producing the diaper, the process is simple, the production can be performed at high speed, and the production efficiency can be improved. Can be improved.

FIG. 5 shows another embodiment of the present invention. As shown in FIG. 5, a diaper 1 according to this embodiment comprises a thread-shaped elastic member 7 having folds 6A, 6A. All the components are configured in the same manner as in the above-described embodiment, except that two are included and formed as a planar portion having a predetermined width. In other words, the fixed portion 9,
The folds 6A, 6A are fixed to the fixing portion 9 (the front side of the side flap 5).
Surface) and stand up. The folds 6A, 6A stand up in a state in which the diaper 1 is curved with the present chair, and the inner fold 6A is located above the topsheet 2 covering the absorber 4, and the longitudinal direction of the absorber 4 It is comprised so that it may be located inside the side edge of a direction. Further, of the elastic members 7, 7 of the inner fold 6A, the extension ratio of the elastic member 7 closer to the fixed portion 9 is set to be larger than the extension ratio of the distant elastic member, and the outer fold portion is set. The elastic members 7 of 6A are also configured such that the extension rate is set to be greater on the side closer to the fixing portion 9 than on the side farther away.

The flat portion of the fold 6A is 5-20.
mm, more preferably 1 mm.
It is about 0 mm. In the case where the elastic member 7 is formed of a single strip, the width of the elastic member 7 in the free state only needs to be formed so as to form a planar portion having the above width. Therefore, according to the diaper 1 of the present embodiment,
The folds 6A, 6A are flat portions and fit to the crotch portions, so that leakage of excrement can be more reliably prevented.

FIG. 6 shows still another embodiment of the present invention. As shown in FIG. 6, a diaper 1 according to the present embodiment is similar to the first embodiment shown in FIGS. Except that a further leakage resistance member 6 'is adhered to the leakage resistance member 6 of the diaper 1 of the embodiment of the second embodiment so as to form a fixing portion 9' on the surface of the leakage resistance member 6. The configuration is the same as that of the first embodiment. In the present embodiment, the fixing portions 9 and 9 'are combined at one location on the surface of the side flap 5, and the fold portions 6A, 6A, 6'A and 6'A are respectively fixed portions 9 and 9'. separated from the (surface of the side flap 5)
It rises Te. Another leak resistance member 6 'is formed to be narrower than the leak resistance member 6, as shown in FIG.
The elastic member 7 'has a larger elongation rate than the other elastic member 7, and the fold 6'A is, as shown in FIG.
It is configured to rise larger than the other fold 6A. Therefore, according to the diaper 1 of the present embodiment, two three-dimensional gathers inclined toward the inside of the absorber 4 are formed, and these are formed from the crotch part of the wearer, from the groin to the thigh. Fits securely.

FIG. 7 is a view showing still another embodiment of the present invention. As shown in FIG. 7, the diaper 1 of this embodiment has a surface sheet 2 inside a side flap 5 as shown in FIG. The outside is formed by the leak resistance member 6, the elastic member 7 is provided only on the inner edge of the leak resistance member 6, and the elastic member 7 is further provided on the surface of the leak resistance member 6 as shown in FIG. Another leak resistance member 6 'is provided in the same manner as described above. In the present embodiment, the fixing portions 9, 9 '
Are gathered in one place on the surface of the side flap 5 ,
The plurality of folds 6A, 6′A, 6′A are respectively fixed portions 9,
9 ′ (the surface of the side flap 5) and stands up. Therefore, according to the present embodiment, two three-dimensional gathers inclined toward the inside of the absorber 4 are formed, and the third gathers are formed.
The same operation and effect as those of the embodiment can be expected.

In the diaper 1 of each embodiment described above, only the absorbers 4 having a rectangular shape have been described. However, these absorbers 4 are not provided with the concave portions of the side flaps 5, 5. If it is curved in accordance with the cutouts 5A, 5A, the fit can be further improved. In the diaper 1 of each embodiment, both ends in the longitudinal direction of each absorber 4 are covered with the back sheet 3 or another leak-proof sheet, and an elastic member is provided on the waist. This can more effectively prevent leakage at the waist.

[0025]

According to the present invention, the diaper of the present invention can be fitted to the crotch portion flexibly to prevent leakage without forming a gap and to prevent leakage at the waist. It is.

[Brief description of the drawings]

FIG. 1 is a plan view showing a part of a surface of a diaper diaper according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which the diaper of FIG. 1 is curved to the front side;

FIG. 3 is a sectional view taken along the line III-III of FIG. 2;

FIG. 4 is a sectional view taken along the line IV-IV of FIG. 2;

FIG. 5 is a view corresponding to FIG. 3, showing another embodiment of the diaper of the present invention;

FIG. 6 is a view corresponding to FIG. 3, showing another embodiment of the diaper of the present invention.

FIG. 7 is a cross-sectional view showing a still further embodiment of the diaper of the present invention at a position opposite to FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Use diaper 2 Top sheet 3 Back sheet 4 Absorber 5 Side flap 6, 6 'Leakage resistance member 6A, 6'A Fold part 7, 7' Elastic member

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

Claims (3)

(57) [Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, an absorber positioned between these two sheets, and extending outward in the width direction from both longitudinal edges of the absorber. and the disposable diaper having a side flap, the surface of the side flap, fold portion which is telescopically formed are respectively provided in plural along a side edge of the absorbent body, a plurality of the fold portion is the rhino grouped together respectively one place
A diaper for a diaper, which is fixed to a surface of a flap , and wherein the plurality of folds are separately raised from a surface of the side flap . Wherein said fold portion are both longitudinally at least partially formed by between away from said topsheet,
The diaper according to claim 1. 3. The diaper according to claim 1, wherein each of the folds includes a plurality of elastic members.