JP3287407B2 - 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.

2. Description of the Related Art Various leak-proof mechanisms for the crotch portion of a diaper have been conventionally proposed. For example, Japanese Patent Publication No. 52-40267, Japanese Patent Application Laid-Open No. 54-115939.
JP-A-52-120045 and JP-A-57-89602 disclose that a gather is provided in advance by using an elastic member along a side edge of a diaper and that the wearer's inseam A diaper is disclosed in which a diaper is made to adhere to a portion of the diaper so as to prevent leakage. Also, Japanese Unexamined Patent Publication No.
In JP-A-157301, JP-A-60-199903 and JP-A-63-60405, a plurality of elastic members having different elongation rates are arranged on a side edge portion so as to conform to a leg circumference of a wearer. In addition, a diaper that can 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 leak 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 part 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 which can flexibly fit to a crotch portion to reliably prevent leakage without creating a gap and also 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 having a pair of side flaps each extended outward from the width direction,
On the surface of each of the side flaps, a pair of folds formed to be stretchable and having free edges are provided along the absorber, and the pair of folds are respectively
A sheet-shaped leak resistance member is fixed along the longitudinal direction of the diaper and the diaper, and one end of each of the pair of folds has a free edge inward in the width direction of the absorber. And the other is provided such that each free edge thereof is directed outward in the width direction of the absorber, and the one free edge of each of the pair of folds is formed by the absorption edge. extends to above the upper surface of the body, the leakage resistance member forming a respective pair of the fold portion is, in use of the diaper, a disposable diaper, characterized in that is provided so as to rise respectively in the crotch portion To provide.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the embodiments shown in Figures 1-6. 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 curved diaper of FIG. FIG. 3 is a perspective view showing the state, and FIG.
FIG. 4 is a sectional view taken along the line IV-IV of FIG. 2, FIG.
FIG. 6 is a view corresponding to FIG . 3 showing another embodiment of the diaper of the present invention. 3 and FIG. 4, the left side portion of the diaper 1 of the embodiment shown in FIG. 1 will be described with reference to FIG. 1. The right side of the diaper 1 of the embodiment has a left side portion. Symmetric (similar)
Is formed. The left portion of the embodiment shown in FIGS. 5 and 6 will be described similarly .

As shown in FIG. 1 , a diaper 1 according to this embodiment has a liquid-permeable top sheet 2 forming a side in contact with the wearer's skin, and a liquid-impermeable surface corresponding to the top sheet 2. Back sheet 3, an absorber 4 located between the back sheet 3 and the top sheet 2 for absorbing excrement, and extending outward in the width direction from both longitudinal edges of the absorber 4. A pair of side flaps 5, 5 are provided, and the side flaps 5, 5 are integrally formed by superimposing the top sheet 2 and the back sheet 3 on each other. 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.

On the surface of the side flap 5, there is provided a leakage resistance member 6 forming a pair of folds 6A, 6A which are formed to extend and contract along the longitudinal side edge of the absorber 4. In addition, 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. In other words, the main diaper 1 is in a state where the elastic member 7 is stretched in an expanded state as shown in FIG. 1 and the main diaper 1 is always pulled inward in the longitudinal direction. , When using the diaper 1
As shown in FIG. 2, the diaper 1 is bent toward the front side, and as shown in FIG. 3, the folds 6A, 6A of the leakage resistance member 6 rise, so that the inside of the leakage resistance member 6 in the width direction is formed. The free edge of the fold 6A is above the upper surface of the absorber 4
It is configured to extend and form a pocket structure at the crotch part by the fold 6A . As described above, the diaper 1 of the present embodiment has a pair of folds 6A which are formed to be stretchable and have free edges along the absorber 4 on the surface of the side flap 5, A pair of folds 6A, 6A
Are fixed along the longitudinal direction of the diaper 1 using a sheet-shaped leak resistance member 6, respectively.
One of the pair of folds 6A, 6A is provided such that a free edge thereof is directed inward in the width direction of the absorber 4, and one of the folds 6A is provided.
A forms a pocket structure in the crotch portion, and the other fold 6A is provided so that its free edge is directed outward in the width direction of the absorber 4.

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, the leak resistance member 6 will be described in more detail with reference to FIGS. The absorber 4 is a back sheet 3
The top surface of the absorber 4 is covered and adhered by the topsheet 2, and the leakage resistance member 6 along the longitudinal side edge of the absorber 4 is fixed to the topsheet 2. The fixing portion 9 is formed in the longitudinal direction with a width, and is adhered so as to form free edges on both longitudinal edges of the leakage resistance member 6. The elastic members 7, 7 are included in bent portions formed by bending the free edges toward the topsheet 2, respectively, to form the pair of folds 6A, 6A. The pair of folds 6
One of A and 6A is provided such that its free edge is directed inward in the width direction of the absorber 4 and extends to above the upper surface of the absorber 4, and the other has its free edge defined by the absorber 4. In the width direction . It is noted that the leakage resistance member 6, for adhesive bonding of the hot-melt or the like on the surface sheet 2, or it is fixed by thermal welding or the like by ultrasound, to improve the feeling when worn super Fixation by thermal welding of acoustic waves is preferred.

As shown in FIG. 4 , the elastic member 7 reaches only the vicinity of both ends in the longitudinal direction of the leakage resistance member 6, and the vicinity of both ends which do not include the elastic member 7 has the leakage resistance member. 6 are bent as described above, and are fixed to the topsheet 2 so as to form a plurality of fixing portions 9 inside. 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. The folds 6A, 6A preferably have 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 member 5 is made of a material obtained by using a defibrated pulp as a main material and an absorbent polymer together,
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 ( FIG. 2 and
( See FIG. 3 ). When the diaper 1 is fixed to the waist by the tape fasteners 8 and 8 in such a state and the diaper 1 is worn, the concave notches 5A and 5A of the side flaps 5 and 5 surround the crotch portion and the folds 6A and 6A are formed. 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. In addition, since the present diaper 1 does not have an elastic member 7 interposed between the top sheet 2 and the back sheet 3 as in the prior art,
The top sheet 2 and the back sheet 3 forming the side flaps 5, 5 are in close contact with each other without any 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 gripper diaper 1 of this embodiment is composed of two elastic members 7 having folds 6A, 6A having thread-like portions. Except for being formed as a planar portion having a predetermined width, the configuration is the same as that of the above embodiment. And the fold 6
A and 6A stand up in a state in which the diaper 1 is curved with the present diaper, and the inner fold 6A is located above the topsheet 2 covering the absorber 4 and is located at a position closer to the longitudinal side edge of the absorber 4. It is configured to be located inside. 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 about 10 mm. In the case where the elastic member 7 is formed of a single band, the width of the elastic member 7 in the free state may 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 fitted to the crotch portion in a planar shape, and leakage of excrement can be more reliably prevented.

Further, FIG. 6 shows a further embodiment of the present invention, a disposable diaper 1 of this embodiment, as shown in the figure, the first embodiment shown in FIGS. 1 to 4 The first embodiment is the same as the first embodiment except that another leakage resistance member 6 'is adhered to the leakage resistance member 6 of the diaper 1 so as to form a fixing portion 9' on the surface of the leakage resistance member 6. The configuration is the same as in the example. As shown in FIG. 6 , another leak resistance member 6 ′ is formed to be narrower than the leak resistance member 6, and the elastic member 7 ′ is set to have a larger elongation rate than the other elastic member 7. As shown in FIG. 6 , the fold 6′A is configured to stand up more 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.

[0023]

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. In particular,
According to the diaper of the present invention, of the pair of folds
The free edge of the inward elastic fold is the top of the absorber
, The fold and the side edge of the absorber
The pocket structure formed between the folds is crushed
A minimum volume is maintained. Also, a pair of folds,
When using the diaper, stand up at the inseam
The folds that extend and contract toward the outside
The side flap of the diaper without interlocking with the said fold
Inward to seal the crotch part inside the
Leaks that could not be prevented by the folds can be prevented,
Furthermore, the outwardly expandable folds are interposed with elastic members.
Rigidity is lower than the side flaps
The lower part can be sealed with a flat surface flexibly, so the crotch
Without reddening or damaging the minutes
It is possible to achieve the effect of preventing leakage,
For diapers, elastic members to prevent leakage
There is no need to intervene in the flap.

[Brief description of the drawings]

FIG . 1 is a plan view showing a part of the surface of an embodiment of a diaper of the present invention, which is cut away.

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

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

FIG . 4 is a sectional view taken along 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.

────────────────────────────────────────────────── (5) References JP-A-64-68503 (JP, A) JP-A-62-250201 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61F 13/45-13/494

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. In a diaper with a pair of side flaps provided, on the surface of each of the side flaps, a pair of folds formed to be stretchable and having free edges are provided along the absorber, respectively. The pair of folds, respectively,
A sheet-shaped leak resistance member is fixed along the longitudinal direction of the diaper and the diaper, and one end of each of the pair of folds has a free edge inward in the width direction of the absorber. The other is provided so that each free edge is directed outward in the width direction of the absorber, and the one free edge of each of the pair of folds is provided with the absorption edge. A diaper according to claim 1, wherein said leakage resistance members extending to above the upper surface of the body and forming each of said pair of folds are provided so as to stand up at the crotch portion when the diaper is used. 2. The nursery diaper according to claim 1, wherein each of said folds has an elastic member on said free edge. 3. The front and rear part of the leakage resistance member in the longitudinal direction is fixed to the topsheet, and the fixing part of the leakage resistance member is within 30 mm outward from the longitudinal side edge of the absorber. The diaper according to 1 or 2, above.