JPS63112703A - Disposable diaper - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a disposable diaper used to absorb and absorb body excrement, and particularly to a disposable diaper that covers a wide area of the wearer's body. The present invention relates to a disposable diaper that can effectively cover the outside of the range. As long as it is included in the concept of this type of diaper, it can be suitably used regardless of whether it is used by infants, the elderly, the sick, or incontinent people.

[Conventional technology]

Conventionally, in disposable diapers, side flaps are formed on both sides in the lateral direction and have a higher degree of flexibility than the semi-rigid absorbent core located in the center between them, and the outer edges of the side flaps are designed to wrap around the wearer's legs. It is known to have an elastic band for sealing, and to form pockets on both sides in the lateral direction by folding the side flaps inward and fixing both longitudinal ends of the folded portions. In addition, a so-called turn-up method is adopted in which the side flap is folded inward, the center of the inner edge of the folded part is fixed, and when in use, the folded part in the anterodorsal area is expanded using the fixed part as a reference point. Things are also known.

[Problem that the invention seeks to solve]

Generally, diapers belonging to any of the above-mentioned known forms have a tendency that the outer edges of the side flaps in the crotch region are pulled toward the wearer's thighs by the contraction of the elastic band provided thereon. When the diaper is pulled in this way, the front center portion of the diaper protrudes relatively largely to the front. This not only significantly impairs the appearance and feeling of wearing, but also interferes with the wearer's ability to walk and wear underwear. This means that the area covered by the diaper or the volume formed by the inner surface of the diaper becomes smaller, and the outer edges of the side flaps in the crotch area come into contact with excrement most often and in large quantities. do.

Therefore, it will be understood that stray excrement often leaks from the crotch area.

In particular, when it comes to diapers that have pockets formed on both sides in the lateral direction, the diaper takes on the shape described above when worn, so the effect of providing the pockets is halved, and in some cases, the openings of the pockets are closed. It may not have any effect at all. The reason why the opening of the pocket is closed in this way is that in addition to the above-mentioned configuration, the outer surface of the inner edge of the pocket comes into contact with the wearer's skin due to the structure in which the side flaps are folded back inside. caused by.

[Means for solving problems]

(Objective) The present invention aims to solve the above-mentioned drawbacks of disposable diapers having elastic bands on the side flaps in the crotch region.

Matters relating to this and other purposes will be understood from the foregoing description.

(Structure) The gist of the present invention is that a water-permeable top sheet,
an impermeable backsheet, a semi-rigid absorbent core fixed between the two sheets, highly flexible side flaps located on both sides of the core in the lateral direction, and telescopic gears in the vertical direction of the side flaps. with an elastic band that makes
A disposable diaper including tape fasteners attached to both sides of the back region of the diaper in the lateral direction, wherein the side flaps include a first flap and a second flap located on the upper surface of the side flap.

The second sheet comprises parts of the top sheet and the back sheet that extend outward from the lateral outer edge of the core and are joined to each other, and an outer part of a strip-like sheet piece joined to the outer upper surface of the back sheet part, and the second a flap extending outwardly from a lateral outer edge of the core and an inner surface of the topsheet portion;

The inner surface of the inner portion of the sheet piece is joined to the inner surface of the sheet in the shape of palms together, and both longitudinal end portions of the flap are joined and fixed to the front region and the back region of the diaper with the outer edge of the flap facing outward. The diaper is characterized in that the elastic band is located at the free end of the second flap in the crotch region between the front region and the back region.

(Embodiments) The embodiments of the present invention will be described as follows.

1 As shown in FIGS. 1 to 4, the diaper includes a water-permeable top sheet 11, a water-impermeable back sheet 12, a semi-rigid absorbent core 13, and side flaps 14.

The side flap 14 consists of a first flap 16 and a second flap 17. The first flap 16 extends outward from the lateral outer edge of the core 13 and joins the top sheet 1 to each other.
1 and a back sheet 12, and an outer portion 18a of a band-shaped sheet piece 18 having air permeability and/or waterproof properties and bonded to the outer upper surface of the back sheet portion. The second flap 17 is formed by joining the inner surface of the top sheet portion 11a extending from the outer edge of the core 13 and the inner surface of the outer portion 11b and the inner surface of the inner portion 18b of the sheet piece 18 in a clasped shape, and the outer edge of the second flap 17 Both longitudinal end portions 17a thereof are joined and fixed at the front region 19a and the back region 19b in a state in which they are directed outward.

The free end of the second flap 17 located in the crotch region 19c between the front and back regions 19a, 19b, i.e. the part 11
b.

An elastic band 21 is attached between the side edges of the elastic band 18b in its length direction with a hot-melt adhesive (not shown) that is elastic when stretched. A recessed notch 22 is formed on the outside of the first flap 16.

The diaper shown in FIGS. 5 and 6 has substantially the same construction as the diaper described above. That is, in the diaper shown in FIG. 5, the elastic band 21 is wrapped around the portion 18b of the sheet piece 18, and in the diaper shown in FIG. 6, the elastic band 21 is wrapped around the portion 11b of the top sheet 11.

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

The top sheet 11 is made of a fibrous non-woven fabric, a porous plastic film, etc., and the back sheet 12 is made of a plastic film, a laminate sheet of the film and a fibrous non-woven fabric, or the like. In the case of the laminate sheet, the nonwoven fabric is used on the outer surface. The plastic film used as the backsheet 12 is preferably breathable and waterproof, but if the diaper is provided with a means to ventilate the inside and outside, it may be non-breathable. No. 13 is a mat-like body in which fluff pulp is mixed with superabsorbent polymer particles or not, and at least the upper and lower surfaces thereof are covered with a water-permeable sheet such as tissue paper or a hydrophobic net. It is semi-rigid because it is made of material and has a shape. Of course, the core 13 is the top sheet 1
1 and the back sheet 12 using, for example, a hot melt adhesive (not shown). The elastic band 21 may also be made of thread-like or tape-like rubber, tape-like plastic foam, plastic film that shows elasticity when heat treated, or the like. These diaper materials are those that have been commonly used in disposable diapers, and therefore it will be extremely easy for those skilled in the art to appropriately select them as necessary.

The band-shaped sheet piece 18 is made of nonwoven fabric, preferably treated to be water repellent.

Note that an elastic band having a lower tensile stress than the elastic band 21 may be attached to the outer edge of the first flap 16 as the case may be.

In the diaper configured as described above, as shown in FIGS. 2 to 6, when the elastic band 21 is contracted, the second flap 17 stands up.

However, since the diaper is being stretched in the longitudinal direction, if the elastic band 21 is sufficiently stretched, the second flaps 17 will fall outward. Therefore, also when the elastic band 21 is stretched to such an extent, the second flap 17 is tilted outward at an angle without completely lying down. The elastic band 21 of the second flap 17 causes the second flap 17 to rise, fall down, and incline according to the degree of elongation of the elastic band 21.
With the outer edge of the second flap facing outward, both longitudinal end portions 17a of the second flap are fixed to the front region 19a and the back region 19b, and the elastic band 21 has a predetermined stretching force. It is. Also, the first
As shown in the figure, when the diaper is assembled, that is, when the diaper is worn, the first flap 16 extends further outward than the second flap 17, so that the second flap 17 forms the gears. is the first flap 1
It will be hidden by 6. This is the first flap 1
This occurs even if the width of the second flap 6 is narrower than that of the second flap 17 by an order of magnitude. This is because the latter shrinks in the elastic band 21 and becomes narrower. However, for better concealment, the widths of both should be approximately equal, or the former should be wider than the latter.

As shown in FIGS. 1 and 2, a waist flap 25 is formed by each portion of the top sheet 11 and back sheet 12 that extend outward from both ends of the core 13 in the longitudinal direction. A second elastic band (not shown) is attached between the waist flaps 25, ie, between the top sheet 11 and the back sheet 12, under tension in the length direction.

(Effects) According to the diaper according to the present invention, as described above, the second flap stands up when the elastic band attached to the free end thereof under a predetermined extension is contracted. If the elastic band is stretched,
Since the second flap is inclined or laid down to the outside depending on the degree of extension, the second flap is less likely to be drawn toward the base of the wearer's thigh when the diaper is worn. Therefore, the front center portion of the diaper does not protrude relatively largely forward, which does not impede the wearer's ability to walk or wear underwear. In particular, the area covered by the diaper or the volume formed by the inner surface of the diaper is unlikely to shrink, which allows excrement to be received over a relatively wide area and effectively seals around the wearer's legs. Therefore, leakage of excrement from around the legs can be prevented.

Furthermore, when the diaper is worn, the first flap may maintain an outwardly extending state, and the second flap, in which the gears are made of the elastic band, may be hidden by the first flap. Therefore, if you do this, it will look as if the item you are wearing is not a diaper, or as if you are wearing shorts over a diaper, which makes it look very good. . This can be further improved by adding a fabric-like pattern to the backsheet of the diaper.

[Brief explanation of the drawing]

The drawings show embodiments of the diaper according to the present invention,
Fig. 1 is an assembled perspective view, Fig. 2 is an exploded perspective view, Fig. 3 is a sectional view taken along the line 3-3 in Fig. 2, Fig. 4 is a partial perspective view of the side flap, which is the main part of the present invention, and Fig. 5 The figure and FIG. 6 are other embodiments corresponding to FIG. 3. 11...Top sheet lla...Part 12.
...Back sheet 12a...part 13...core 14...side flap 16...first flap 17...second flap 18...sheet piece 18a, 18b...part 19a...
- Front area 19b... Back area 19c... Inseam area 21... Elastic band 22...
Recessed part Fig. 3 Fig. 4 Fig. 5 Fig. 6

Claims (5)

[Claims] (1) a water-permeable top sheet, a water-impermeable back sheet, a semi-rigid absorbent core fixed between the two sheets, and highly flexible side flaps located on both sides of the core in the lateral direction; A disposable diaper comprising an elastic band forming elastic gathers in the longitudinal direction of the side flaps and tape fasteners attached to both transverse sides of the back region of the diaper, comprising: a. the side flap includes a first flap and a second flap located on the upper surface thereof; b. The first flap includes each portion of the top sheet and the back sheet that extend outward from the lateral outer edge of the core and are joined to each other, and an outer portion of a strip-like sheet piece that is joined to the outer upper surface of the back sheet portion. consisting of c. The second flap is formed by joining the inner surface of the top sheet portion extending outward from the lateral outer edge of the core and the inner surface of the inner portion of the sheet piece in a joined shape, and the outer side of the flap. both longitudinal ends thereof are joined and fixed to the front and back regions of the diaper with the edges facing outward; d. The diaper, wherein the elastic band is located at a free end of the second flap in the crotch region between the front region and the back region. (2) The diaper according to claim 1, wherein the first flap has breathability and/or waterproofness. (3) The diaper according to claim 1, wherein the second flap has breathability and/or waterproofness. (4) The diaper according to claim 1, wherein the outside of the first flap in the crotch region of the diaper is notched. (5) The diaper according to claim 1, wherein the elastic band is housed in a bag portion formed at the free end of the second flap.