JPH0771569B2 - Disposable diapers - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a disposable diaper used for absorbing and receiving body excrement, and in particular, it has a wide range of covering a wearer's body. The present invention relates to a disposable diaper capable of effectively seating the outer contour of a range. As long as it is included in the concept of this kind of diaper, it can be suitably used regardless of whether it is used for infants, the elderly, sick or incontinent.

[Conventional technology]

Conventionally, in a disposable diaper, side flaps having a high degree of flexibility are formed on both sides in the lateral direction in comparison with a semi-rigid absorbent core located in a central portion between them, and a side flap having a high degree of flexibility is formed on an outer edge of the side flap to support the wearer's legs. It is known that an elastic band is provided for sealing, and further, that the side flaps are folded back inwardly, and both longitudinal ends of the folded back portions are fixed to form pockets on both sides in the lateral direction. In addition, the side flap is folded back inwardly, the center portion of the inner edge of the folded back portion is fixed, and at the time of use, the folded back portion in the front-dorsal region is expanded with the fixed portion as a base point. Things are also known.

[Problems to be solved by the invention]

In general, the diaper of any of the above-mentioned known forms has a tendency that the outer edge of the side flap in the crotch region is pulled toward the wearer's thigh root due to the contracting action of the elastic band included therein. When attracted in this way, the central part of the front side of the diaper projects to the front side relatively large. This not only significantly deteriorates the appearance and feeling of wearing, but also interferes with the walking of the wearer and wearing of underwear, and in particular,
The diaper having such a shape means that the diaper is reduced in size, that is, the area covered by the diaper or the inner surface of the diaper is reduced, and
It means that the outer edges of the side flaps in the crotch region are the best and in large contact with the excrement. Thus, it will be appreciated that excrement will often leak from the crotch region.

In particular, with regard to a diaper having pockets formed on both sides in the lateral direction, since the diaper has the above-described form when worn, the effect of providing the pocket is halved, and in some cases, the opening of the pocket is closed. May not be effective at all. In addition to the above-mentioned form, the opening of the pocket is closed, and the outer surface of the inner edge of the flap comes into contact with the wearer's skin due to the folding structure of the side flap to the inside. Due to that.

The present invention is directed to overcoming the previously mentioned drawbacks of disposable diapers with elastic bands on the side flaps in the crotch region.

[Means for solving problems]

Where the gist of the present invention is, a water-permeable top sheet,
Water-impermeable backsheet, semi-rigid absorbent core fixed between the two sheets, side flaps located on both sides of the core in the lateral direction and having high flexibility, and elastic gathers in the longitudinal direction of the side flap. An elastic band that creates
A disposable diaper including tape fasteners attached to both lateral sides of a dorsal region of the diaper, wherein the side flap comprises a first flap and a second flap located on an upper surface thereof, and the first flap comprises the core. Of each of the top sheet and the back sheet that extend outward from the lateral outer edge and are joined to each other, the second flap has a ventilation waterproof property, and the upper surface of the first flap is formed of a strip-shaped sheet piece. As the side edges are joined,
The both end portions in the longitudinal direction are joined and fixed to the front side region and the back side region of the diaper with the outer edge thereof facing outward, and the elastic band is crotch between the front side region and the back side region. The diaper is characterized in that it is located at the free end of the second flap in the region.

(Embodiment) An embodiment of the present invention is as follows.

As shown in FIGS. 1 to 4, the diaper has a water-permeable topsheet 11, a water-impermeable backsheet 12, a semi-rigid absorbent core 13, and side flaps 14. The side flap 14 comprises a first flap 16 and a second flap 17.
The first flap 16 extends outwardly from the lateral outer edge of the core 13 and joins with each other. The topsheet 11 and the backsheet 12
Of each part 11a, 12a. The second flap 17 is a strip-shaped sheet piece 18 having breathability and waterproofness on the upper surface of the first flap 16.
Both sides 18a, 18b in the state in which it is bent in an inverted U shape
Are formed by being joined together, their folded outer edges are directed outward, and their longitudinal end portions 17a are formed.
Are joined and fixed in the front region 19a and the back region 19b. The elastic band 21 is elastic in the lengthwise direction of the elastic band 21 inside the bag-shaped interior of the free end of the second flap 17 located in the crotch region 19c between the front back regions 19a and 19b (not shown). Installed).

In the diaper shown in FIG. 5, the inner portion 18a of the second flap 17 extends to the side edge of the core 13 and is joined to the top sheet 11 on the upper surface of the side edge.

A tape fastener 24 coated with a pressure-sensitive adhesive is attached to the side flap 14 in the back side region 19b, and the diaper, when worn, has its free end adhered to the front surface as shown in FIG. Assembled by

A fiber nonwoven fabric, a porous plastic film or the like is used for the top sheet 11, a plastic film, a laminated sheet of the film and the fiber nonwoven fabric, or the like is used for the back sheet 12. In the case of the laminate sheet, the non-woven fabric is used so as to be located on the outer surface. Also, the back sheet 12
It is preferable that the plastic film as mentioned above has a breathable waterproof property, but if it is provided with a means for ventilating the inside and outside of the diaper, it may not have a breathable property. As the core 13, a fluff pulp in which particles of a superabsorbent polymer are mixed or not mixed, at least the upper and lower surfaces of a mat-like body coated with a water-permeable sheet such as tissue paper and a hydrophobic net are used, and, It is semi-rigid due to its morphology made from such materials. Naturally, the core 13 is relatively immovably bonded and fixed to the top sheet 11 and the back sheet 12 with, for example, a hot melt adhesive (not shown). As the elastic band 21, a thread-shaped or tape-shaped rubber, a tape-shaped plastic foam, a plastic film which is stretchable by heat treatment, or the like is used. Since these diaper materials have been conventionally used for disposable diapers in general,
It will be extremely easy for a person skilled in the art to make an appropriate selection as necessary. As the strip-shaped sheet piece 18, a non-woven fabric that is preferably water repellent is used.

In the diaper configured as described above, as shown in FIGS. 2 to 5, when the elastic band 21 is contracted, the second flap 17 stands up. However, since the diaper is pulled in the longitudinal direction, when the elastic band 21 is sufficiently stretched, the second flap 17 is laid down outward. Therefore, also when the elastic band 21 is stretched to some extent, the second flap 17 is inclined at an angle to the outside without completely reclining. Thus, the second flap 17 has an elastic band 21.
It rises, falls, and inclines according to the degree of extension of the second flap 17 with the outer edge of the second flap 17 where the elastic band 21 is located facing outwards.
This is because 17a is fixed to the front side region 19a and the back side region 19b, and the elastic band 21 has a predetermined extension force. Further, as shown in FIG. 1, in the assembled state of the diaper, that is, in the worn state of the diaper, the first flap 16 extends outwardly beyond the second flap 17, and thus gathers are made. Second flap 17
Will be hidden by the first flap 16. this is,
It occurs even if the width of the first flap 16 is somewhat narrower than that of the second flap 17. The latter is an elastic band
Because it shrinks at 21 and the width becomes narrower. However, in order to more preferably hide, it is preferable that the widths of the two are substantially equal to each other, or that of the former is wider than that of the latter.

As shown in FIG. 1 and FIG. 2, the top sheet 11 and the back sheet 12 extending outward from both longitudinal ends of the core 13 are provided.
A waist flap 25 is formed in each part of and. A second elastic band (not shown) is attached between the waist flaps 25, that is, between the top sheet 11 and the back sheet 12 so as to extend in the longitudinal direction thereof.

(Effect) According to the diaper of the present invention, as described above, the second flap stands up when the elastic band attached to the free end of the second flap under a predetermined extension is contracted, and When the elastic band is elongated,
Since the second flap is inclined or laid down outward depending on the degree of extension, when the diaper is worn, the second flap is unlikely to be drawn to the thigh root of the wearer. Therefore, the front center part of the diaper does not project to the front side relatively greatly, and does not hinder the wearer's walking or wearing of underwear. In particular, the area covered by the diaper or the volume formed on the inner surface of the diaper is less likely to decrease, so that the excrement can be received in a relatively wide area and the wearer's leg area can be effectively sealed. Therefore, it is possible to prevent leakage of excrement from around the legs.

Further, when the diaper is worn, it is possible to keep the first flap extended to the outside so that the second flap, which is gathered by the elastic band, is hidden by the first flap. Therefore, if you do so, it looks as if you are wearing a diaper, or you are wearing shorts over the diaper, and the appearance is very good. is there. This is further improved by giving a cloth-like pattern to the back sheet of the diaper.

[Brief description of drawings]

The drawings show an embodiment of a diaper according to the present invention,
1 is an assembled perspective view, FIG. 2 is an exploded perspective view, FIG. 3 is a sectional view taken along line 3-3 of FIG. 2, and FIG. 4 is a partial perspective view of a side flap which is a main part of the present invention. The figure shows another embodiment corresponding to FIG. 11 …… Top sheet, 12 …… Back sheet 13 …… Core, 14 …… Side flap 16 …… First flap, 17 …… Second flap 18 …… Seat piece, 18a, 18b …… Side 19a …… Front area, 19b …… Back area 19c …… Inseam area, 21 …… Elastic band, 22 ……
Recess

Claims (1)

[Claims] 1. A water-permeable topsheet, a water-impermeable backsheet, a semi-rigid absorbent core fixed between the two sheets, and side flaps located on both sides of the core in a lateral direction and having high flexibility. A disposable diaper comprising: an elastic band that creates elastic gathers in the longitudinal direction of the side flap, and tape fasteners attached to both lateral sides of the dorsal region of the diaper, the side flap being the first flap and its A second flap located on an upper surface, b. The first flap comprises portions of the topsheet and the backsheet extending outwardly from a lateral outer edge of the core and joined together, c. The second flap has a ventilation waterproof property, and the side edge of the strip-shaped sheet piece is joined to the upper surface of the first flap, and the outer edge thereof is directed outward. In the state, both longitudinal end portions thereof are joined and fixed to the front side region and the back side region of the diaper, and the elastic band of the second flap in the crotch region is located between the front side region and the back side region. The diaper is characterized in that it is positioned at the free end.