JP2000005231A - Throwaway diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a diaper an enough ability to absorb urine, to improve its smoothness to put legs inside especially in case of a underpants-type diaper, and to increase its ability to fit around legs. SOLUTION: In a paper diaper, an absorptive element 13 which is mainly made of a cotton-like pulp and has a constricted part 13a of which both side rims around the place where a leg is put in are constricted inward and an absorptive body AB, which consists of a crape paper in which the absorptive element 13 is comprised, are set between a liquid permeable sheet and a liquid impermeable sheet. The crepe paper consists of a crepe paper 14A for an upper layer that has an upper flap part, which extends toward both the outside beyond the upper surface of the absorptive element 13, and the side rim of a part that is not constricted and a crepe paper 14B for a lower layer that has an lower flap part, which extends toward both the outside beyond the lower surface of the absorptive element 13 and the side rim of a part that is not constricted, and a folding part to be top of the above-mentioned upper flap part by being folded from the extended end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a disposable paper diaper, and more particularly to a disposable paper diaper having a characteristic absorbent structure.

[0002]

2. Description of the Related Art In this type of disposable disposable diaper,
At present, pants-type disposable diapers (in general, the both side edges of the front and rear views are joined by, for example, ultrasonic welding to form a trunk opening and a pair of left and right leg openings), Tape fastener-type disposable diapers (the front and rear parts of the diaper are separated as products, and when used, tape fasteners that are attached to both sides of the rear body in advance are fixed to the front of the front body) You.

[0003] In any case, an absorbent mainly composed of cotton-like pulp is interposed between the liquid-permeable sheet and the liquid-impermeable sheet, and the absorbent is combined with the liquid-permeable sheet and the liquid-impermeable sheet. It is covered with. In this case, the upper and lower surfaces of the cotton-like pulp are covered with crepe paper because the shape of the cotton-like pulp alone is not stable. The absorber may have a two-layer structure or a polymer absorbent may be provided at an appropriate position.

[0004]

In recent years, the form of this type of absorber has been technically established, and no consideration has been given to improving it.

However, when the absorber is examined again from various angles, it is necessary that the absorber has a desired urine absorbing ability. If you increase the area, especially in pants-type disposable diapers, when putting the legs and wearing,
It has been found that there is a problem that it is necessary to prevent the leg from hitting the cotton-like pulp having a certain degree of rigidity (semi-rigidity) and making it difficult to wear.

Accordingly, a main object of the present invention is to provide a disposable disposable diaper which has a sufficient urine absorption capacity as a whole, but which improves the ease of leg insertion and enhances the fit around the leg, especially in a pants-type diaper. To provide disposable diapers.

[0007]

Means for Solving the Problems The invention according to claim 1 of the present invention, which has solved the above-mentioned problems, is mainly composed of cotton-like pulp having a constricted portion in which both side edges are inwardly constricted at positions corresponding to the leg circumference. In a disposable diaper in which an absorbent element and an absorbent having crepe paper containing the absorbent element are provided between a liquid-permeable sheet and a liquid-impermeable sheet, the crepe paper has an upper surface of the absorbent element. An upper crepe paper to cover and a lower crepe paper to cover the lower surface, wherein the upper crepe paper and the lower crepe paper wrap the absorbing element at least in the width direction, and at least one of the upper crepe paper and the lower crepe paper is A disposable disposable diaper having a flap portion extending outward on both sides beyond a non-constricted portion side edge.

[0008] The invention according to claim 2 comprises an absorbent element mainly composed of cotton-like pulp and a crepe paper containing the absorbent element, having a constricted portion in which both side edges are inwardly constricted at positions corresponding to the leg circumference. In a disposable diaper having an absorbent body provided between a liquid-permeable sheet and a liquid-impermeable sheet, the crepe paper extends outward on both sides beyond the upper surface of the absorbent element and the side edges of the non-constricted portion. An upper layer crepe paper having an existing upper flap portion, a lower surface of the absorbent element, a lower flap portion extending beyond both side edges of the non-constricted portion to both outer sides, and a folded back from the extending end to the upper flap portion. And a lower crepe paper having a folded portion to be superimposed on the disposable paper diaper.

According to a third aspect of the present invention, in each flap portion beyond the side edge of the non-constricted portion, the crepe papers to be polymerized are joined to each other by a hot melt adhesive, and the movement of the absorbing element in the width direction is restricted. The disposable paper diaper according to claim 1 or 2, wherein

According to a fourth aspect of the present invention, there is provided an absorbent element mainly composed of cotton-like pulp having a constricted portion in which both side edges are inwardly confined at a position corresponding to the leg circumference, and a crepe paper including the absorbent element. An absorbent body is provided between the liquid-permeable sheet and the liquid-impermeable sheet, and further, in a disposable diaper having barrier cuffs on both sides of the product use side, the crepe paper has an upper surface of the absorbent element and a non-woven cloth. An upper layer crepe paper having an upper flap extending beyond both sides of the constricted portion, and a lower flap extending below both sides beyond the non-constricted portion side edge; A lower crepe paper having a folded portion folded back from the extending end thereof and overlapped with the upper flap portion, wherein a rising edge in the width direction of each of the barrier cuffs extends to a constricted portion of the upper crepe paper. Are disposable diapers, characterized by being located in a non-constricted portion.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the embodiments shown in the drawings.

(Example of Overall Structure) FIG. 1 shows a developed state of a pants-type diaper P according to the present invention, FIG. 2 shows a front view of the pants-type diaper P in a product state, and FIG. 3 shows a side view thereof. . That is, the disposable diaper P of the present example has the outer sheet 1 and
The outer sheet 1 is fixed to the inner surface, and includes an absorbing body 10 extending in the front-rear direction around the crotch portion 4.

As can be seen from the relationship between FIG. 1, FIG. 2 and FIG. 3, by joining both side edges of the front view F and the rear view B, the trunk opening WO and the pair of left and right leg openings LO are formed. The leg openings LO, LO are provided with leg elastic members made of a plurality of elastic yarns G1,..., G2. The form of the joint 30 will be described later in detail. Reference numeral 20 denotes a waist elastic member for improving the fit of the waist, and reference numeral 21 denotes a waist elastic member for improving the fit of the waist and preventing urine from leaking back and forth. Note that FIG.
3 and FIG. 3, the waist elastic member 20 is not shown.

The outer sheet 1 is formed by laminating and fixing a plurality of nonwoven fabrics. Between them, the left waist side 2L of the front body F, the left leg circumference 3L of the front body F, the crotch part 4, the front body F Are fixed so as to be continuous to the right waist side 2R of the front body F via the right leg circumference 3R of the front body F, and from the left waist side 5L of the back body F to the left of the back body F. 6L around the leg,
A plurality of elastic yarns G2 are connected to the crotch portion 4 and the right waist side portion 5R of the back body F via the right leg surrounding portion 6R of the back body F and so on.
Is fixed. As shown in FIGS. 2 and 3, the plurality of elastic yarns G1..., G2.
7 is formed. C indicates a central area around each leg.

The absorbent main body 10 is made of, for example, a non-woven fabric or the like, and is a liquid-permeable top sheet 11 that directly touches the wearer's skin.
And a liquid-impervious back sheet 1 made of a plastic film such as polyethylene or a nonwoven fabric subjected to a water-repellent treatment.
2, an absorber AB having a crepe paper 14 enclosing an absorbent element 13 mainly composed of cotton-like pulp,
Peripheral portions of the liquid-permeable top sheet 11 and the liquid-impermeable back sheet 12 where the absorber AB does not exist are bonded and integrated using, for example, a hot melt adhesive to position the absorber AB. Can be formed.

In the disposable diaper P of this embodiment, the front body F
Are arranged on the left waist side 2 of the front body F.
L, the crotch part 4 and the right waist side part 2R of the front body F are fixed to the outer shape sheet 1 in a bundled state, and other parts, that is, the left leg surrounding part 3L of the front body and the right leg surrounding part 3R of the front body F Are fixed to the outer sheet 1 at intervals.

Also, a plurality of elastic yarns G2 on the back body F side.
Are the left waist side part 5L, the crotch part 4 and the back body F of the back body F
Are fixed to the outer shape sheet 1 in a bundled state at the respective portions of the right waist side portion 5R, and the other portions, that is, the left leg surrounding portion 6L of the rear body F and the right leg surrounding portion 6R of the rear body F are spaced from each other. It is opened and fixed to the outer sheet 1. In the illustrated example, a plurality of elastic yarns G1... Fixed to the front body F side and a plurality of elastic yarns G2 fixed to the back body F side
Are bundled together in the crotch part 4.

Therefore, in the disposable diaper 1 of this embodiment, the plurality of elastic yarns G1,..., G2,.
L, 3R, 6L, 6R are the widest, and crotch 4 and waist 2L, 2R, 5L, 5R are the narrowest.

By arranging the elastic yarns in this manner, the contraction force of the portions where the plurality of elastic yarns G1... G2 are bundled and fixed, that is, the crotch portion 4 and the waist side portions 2L, 2R, 5L, 5R. Weakens. As a result, the shrinkage of the absorber 3 in the width direction is reduced, and a tightening trace is less likely to be formed on the waist side of the adherend. In this example, the leg circumferences 3L, 3R, 6L, 6
In R, the plurality of elastic yarns G1..., G2... Are fixed to the outer sheet 1 with a space therebetween, so that the contraction force of this portion is equal to the crotch portion 4 and the waist side portions 2L, 2R, 5L, 5R. Stronger than. Further, the leg circumferences 3L, 3R, 6L, 6R are in contact with the thighs of the adherend on a wider surface in the width direction. Therefore,
It has good fit to the base of the thigh, hardly shows any trace of tightening, and has excellent side leakage prevention effect.

On the other hand, as the elastic member or the elastic yarn, a natural rubber yarn or a synthetic rubber yarn having an appropriate thickness and cross-sectional shape can be used. The number of elastic yarns need not be three as in the illustrated example, as long as the number is plural.

In the above example, both the plurality of elastic yarns G1 fixed to the front body F side and the plurality of elastic yarns G2 fixed to the back body F side are bundled together in the crotch portion 4. But not limited to this. That is, a plurality of elastic yarns fixed to the front body F side and a plurality of elastic yarns fixed to the back body F side can be separately bundled at the crotch portion.

In this case, a plurality of elastic yarns G on the front body F side
3 and a plurality of elastic yarns G4 on the back body F side
, And each of the plurality of elastic yarns G
.., G4... Cross each other, or a plurality of elastic yarns G5 on the front body F side and a plurality of elastic yarns G6.
Also, the plurality of elastic threads G5, G6,.

Further, in the above example, the plurality of elastic yarns in the crotch portion and the waist side portion are fixed to the outer shape sheet in a bundled state, and the plurality of elastic yarns in the leg surrounding portions are fixed to the outer shape sheet at intervals. But not limited to this.

That is, it is sufficient that at least the interval between the plurality of elastic yarns in the crotch portion is smaller than that in the leg circumference. Therefore, as long as such a condition is satisfied, for example, a plurality of elastic yarns in all parts may be arranged at intervals. Further, when the interval between the plurality of elastic yarns at both the crotch portion and the waist side portion is smaller than that around the leg, the mutual interval between the plurality of elastic yarns at the crotch portion and the plurality of elastic yarns at the waist side portion are provided. The mutual spacing of the yarns may be different.

On the other hand, as shown in FIGS. 1 and 2, the joints of the present embodiment, which are formed by joining substantially the entire longitudinal edges of both side edges of the front view F and the rear view B, are connected. Numeral 30 is non-parallel to the diaper center line, and the outer side of the diaper is closer to the leg opening LO, so that the leg can be easily inserted.

(Regarding the Form of the Absorber) FIG. 4 shows a typical example of the embodiment of the absorber of the present invention. That is, an absorbent element 13 mainly composed of cotton-like pulp having a constricted portion 13a in which both side edges are inwardly constricted at positions corresponding to the leg circumference, and a crepe paper 14 containing the absorbent element 13
A, 14B and the absorber AB. The absorber AB is provided between the liquid-permeable sheet 11 and the liquid-impermeable sheet 12 as described above and as clearly shown in FIGS.

The crepe paper is composed of an upper crepe paper 14A having an upper flap portion extending outwardly beyond the side edge of the non-constricted portion, as shown in FIG. A lower crepe paper 14B having a lower surface of the absorbent element 13, a lower flap portion extending outwardly beyond the side edge of the non-constricted portion, and a folded portion folded from the extending end thereof and overlapped with the upper flap portion. And

The advantages of adopting such an absorber form are as follows. That is, first, since the absorbent element 13 is wrapped by the upper and lower crepe papers 14A and 14B, the absorbent element 13 does not protrude at least outward in the width direction.

Second, even if the width of the absorbing element 13 is reduced, urine absorption is ensured in the width region where the upper and lower crepe papers 14A and 14B exist. However, in the portion where only the upper and lower crepe papers 14A and 14B outside the constricted portion 13a are present, there is no rigidity and the crepe paper is easily deformed. You can easily put your legs.

Conversely, the provision of the constricted portion 13a in the absorbing element 13 allows a greater degree of freedom in the movement of the legs after mounting, and exhibits good fit around the legs.

Third, as shown in FIGS. 5 and 6 showing embodiments having a barrier cuff, a barrier sheet 40 made of a liquid-impermeable sheet or a water-repellent sheet and provided at a free end thereof. When the barrier cuff is constituted by the elastic elastic member 41, if the rising edge of the barrier cuff is positioned at the constricted portion 13a or further positioned on the outer non-constricted portion, at least the constricted portion 13a is used for temporary loose stool. The upper crepe paper 14A of the upper and lower crepe papers 14A and 14B acts mainly to diffuse the urine, and the urine diffused in the widthwise middle or longitudinal direction is eventually absorbed by the absorbent element 1.
3 will be absorbed.

Therefore, since the rising edge of the barrier cuff does not need to be located within the width of the absorbent element 13, the rising edge of the barrier cuff can be located more outwardly.
As a result, the clearance between the free ends of the barrier cuffs on both sides can be increased, so that urine and loose stool can be reliably captured even if the wearer moves excessively in the width direction.

On the other hand, as shown in FIG. 8, the side of the upper crepe paper 14A may be overlapped on the side of the lower crepe paper 14B.

The form of the absorbent body of the present invention is not limited to a pants-type paper diaper, but is also applicable to a tape fastener type paper diaper as shown in FIG. A barrier cuff can also be formed in this tape fastener type disposable diaper.

[0035]

As described above, according to the present invention, it has a sufficient urine absorption capacity as a whole, and in particular, in a pants-type diaper, it is possible to improve the ease of passing through the legs and improve the fit around the legs. Benefits are brought.

[Brief description of the drawings]

FIG. 1 is a development view of a pants-type diaper according to the present invention.

FIG. 2 is a front view of the pants-type diaper according to the present invention when not worn.

FIG. 3 is a side view thereof.

FIG. 4 shows a form of an absorber, wherein (A) is a plan view,
(B) is the BB line arrow view.

FIG. 5 is a developed view showing a second embodiment of a disposable diaper having a barrier cuff according to the present invention.

FIG. 6 is a schematic cross-sectional view of a leg-around portion.

FIG. 7 is a development view of an embodiment of a tape fastener type disposable diaper.

FIG. 8 is a schematic cross-sectional view showing another form of the absorber.

[Explanation of symbols]

P ... Pant type diaper, 1 ... Outer sheet, 10 ... Absorbent, 11 ... Liquid-permeable topsheet, 12 ... Liquid-permeable backsheet, 13 ... Absorptive element, 13a ... Bound part, 14A ...
Upper crepe paper, 14B Lower crepe paper, 30 Joint, 40 Barrier sheet, 41 Elastic elastic member, AB
…Absorber.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazunori Ito 4765-11 Samukawa-cho, Iyo Mishima City, Ehime Prefecture F-term (reference) 3D029 BA05 BA13 BD10 BD12 BD13 BD14 BD17 BD18 4C098 AA09 CC02 CC10 CC12 CC29 CC39 CE05 CE07 DD10 DD25 DD30

Claims (4)

[Claims] An absorbent body comprising a cotton-like pulp-based absorbent element and a crepe paper containing the absorbent element has a constricted portion in which both side edges are inwardly confined at positions corresponding to the leg circumference. In a disposable diaper provided between a liquid sheet and a liquid impervious sheet, the crepe paper has an upper crepe paper covering an upper surface of the absorbing element, and a lower crepe paper covering a lower surface, and the upper crepe The paper and the lower crepe paper wrap the absorbent element at least in the width direction, and at least one of the upper crepe paper and the lower crepe paper has a flap portion extending beyond both side edges of the non-constricted portion to both outsides. A disposable disposable diaper characterized by that. 2. An absorbent body comprising a cotton-like pulp-based absorbent element and a crepe paper containing the absorbent element, the absorbent element having a constricted portion whose both side edges are inwardly constricted at positions corresponding to the leg circumference. In a disposable diaper provided between a liquid sheet and a liquid impervious sheet, the crepe paper has an upper flap portion extending to both outer sides beyond an upper surface of the absorbing element and a non-constricted portion side edge. An upper layer crepe paper having, a lower surface of the absorbent element, a lower flap portion extending beyond the non-constricted portion side edge to both outer sides, and a folded portion folded from its extending end and overlapped with the upper flap portion. A disposable disposable diaper comprising: a lower crepe paper having the following. 3. The crepe paper to be polymerized is joined to each other by a hot-melt adhesive at each flap portion beyond the side edge of the non-constricted portion, thereby restricting the movement of the absorbing element in the width direction. 2. The disposable disposable diaper described in 2. 4. An absorbent body comprising a cotton-like pulp-based absorbent element and a crepe paper containing the absorbent element, the absorbent element having a constricted portion in which both side edges at the position corresponding to the leg circumference are confined inward. In a disposable diaper provided between a liquid sheet and a liquid impervious sheet, and further having barrier cuffs on both sides of the product use side, the crepe paper may exceed an upper surface of the absorbent element and a side edge of a non-constricted portion. Upper crepe paper having an upper flap extending outwardly from both sides; a lower surface of the absorbent element, a lower flap extending outwardly beyond the non-constricted portion side edge, and folded back from the extending end thereof. And a lower layer crepe paper having a folded portion overlapped with the upper flap portion, wherein the upright edge in the width direction of each of the barrier cuffs is located at a constricted portion or a non-constricted portion of the upper crepe paper. Disposable diapers, characterized in that is.