JP4079520B2 - Disposable paper diapers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable paper diaper, and more particularly to a disposable paper diaper characterized by the structure of an absorber.
[0002]
[Prior art]
In this type of disposable paper diaper, currently, a pants-type paper diaper (generally, for example, ultrasonic welding is performed on both side edges of the front body and the back body in order to form a trunk opening and a pair of left and right leg openings. Etc.) and tape fastener type paper diaper (the product is in a state where the front body and the back body are separated, and the tape fasteners attached to both sides of the back body in advance during use are fastened to the front of the front body And what to do).
[0003]
In any case, an absorbent body mainly composed of cotton-like pulp is interposed between the liquid-permeable sheet and the liquid-impermeable sheet, and the absorbent body is covered with the liquid-permeable sheet and the liquid-impermeable sheet. Yes. 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. Further, the absorber can have a two-layer structure, or a polymer absorbent can be provided at an appropriate position.
[0004]
[Problems to be solved by the invention]
In recent years, the form of this type of absorber has been technically established, and the present situation is that no consideration has been given to the improvement thereof.
[0005]
However, when the absorber is examined again from various angles, it is necessary that the absorber has the desired urine absorption capacity. In order to increase the urine absorption capacity, the area of the absorbent cotton flocs is reduced. If it enlarges, especially in a pants-type paper diaper, there is a problem that it is necessary to avoid that the leg is hard to wear against cotton-like pulp having a certain degree of rigidity (semi-rigidity) when the leg is put on and worn. It has been found.
[0006]
Therefore, the main object of the present invention is to provide a disposable paper diaper that has a sufficient urine absorption capacity as a whole, but improves the ease of leg passage particularly in a pant-type diaper and has improved fit around the leg. There is to do.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 of the present invention that has solved the above-mentioned problems is formed by joining the side edges of the front body and the back body to form a trunk opening and a pair of left and right leg openings.
An absorbent body having an absorbent element mainly composed of cotton-like pulp having a constricted portion with both side edges constricted inward at a position corresponding to the leg circumference, and a crepe paper containing the absorbent element, is not a liquid-permeable sheet. In a pants-type paper diaper, which is provided between the liquid-permeable sheet and has barrier cuffs on both sides of the use surface side of the product.
The crepe paper has an upper crepe paper that has an upper flap portion that extends beyond the upper surface of the absorbent element and the side edge of the non-constricted portion and extends outwardly over the entire length of the absorbent element ;
A lower flap portion that extends beyond the lower surface of the absorbent element, the side edge of the non-constricted portion, and extends outward from the entire length of the absorbent element ; and a folded portion that is folded back from the extended end and overlapped with the upper flap portion. A lower layer crepe paper having
The disposable paper diaper is characterized in that the rising edge on the inner side in the width direction of each barrier cuff is located on the upper layer crepe paper outside the width of the non-buckled portion.
[0008]
The invention according to claim 2 is the disposable diaper according to claim 1, wherein the joint portion of the side edge is not parallel to the diaper center line, and is positioned outward of the diaper toward the leg opening side.
[0009]
According to a third aspect of the present invention, the crepe papers to be polymerized are joined to each other by a hot melt adhesive at each flap portion beyond the side edges of the unbundled portion, and movement in the width direction of the absorbent element is restricted. Item 3. A disposable paper diaper according to item 1 or 2.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings.
(Overall structure example)
FIG. 1 shows an unfolded state of a pant-type diaper example P according to the present invention, FIG. 2 shows a front view of the pant-type diaper P in a product state, and FIG. 3 shows a side view thereof. That is, the paper diaper P of the present example includes an outer sheet 1 and an absorbent main body 10 that is fixed to the inner surface of the outer sheet 1 and extends in the front-rear direction around the crotch portion 4.
[0011]
As can be seen from the relationship between FIG. 1, FIG. 2 and FIG. 3, the body opening WO and the pair of left and right leg openings LO are formed by joining the side edges of the front body F and the back body B, In the illustrated embodiment, a leg-hole elastic member composed of a plurality of elastic yarns G1,..., G2... Is provided in the leg openings LO, LO so as to contract the openings. The form of the joint portion 30 will be described in detail later. Reference numeral 20 denotes a waistline elastic member for enhancing the waistline fit, and 21 is a waistline elastic member for enhancing the waistline fit and preventing urine leakage. 2 and 3, the waistline elastic member 20 is not shown.
[0012]
The outer sheet 1 is formed by laminating and fixing a plurality of non-woven fabrics, and between them, the left waist side 2L of the front body F to the left leg surrounding part 3L of the front body F, the crotch part 4, and the right leg of the front body F A plurality of elastic threads G1,... Are fixed so as to continue to the right waist side 2R of the front body F through the periphery 3R, and the left leg side part of the back body B from the left waist side 5L of the back body B A plurality of elastic yarns G2 are fixed so as to continue through 6L, the crotch portion 4, the right leg surrounding portion 6R of the back body B and the right waist side portion 5R of the back body B. 2 and 3, leg gathers 7 and 7 are formed in the left leg surrounding parts 3L and 6L and the right leg surrounding parts 3R and 6R by the plurality of elastic yarns G1. . Note that C indicates a central region around each leg.
[0013]
The absorbent main body 10 is, for example, a liquid-permeable top sheet 11 made of a nonwoven fabric or the like that directly touches the wearer's skin, and a liquid-impervious back sheet 12 made of a plastic film such as polyethylene or a water-repellent nonwoven fabric. An absorbent body AB having a crepe paper 14 containing an absorbent element 13 mainly composed of cotton-like pulp is sandwiched between the absorbent body AB and the absorbent body AB formed by the liquid-permeable top sheet 11 and the liquid-impermeable back sheet 12. For example, the absorber AB can be formed by bonding and integrating the peripheral portion where no water is present with, for example, a hot melt adhesive.
[0014]
In the paper diaper P of the present example, the plurality of elastic yarns G1,... On the front body F side are bundled at the left waist side 2L, the crotch part 4 of the front body F, and the right waist side 2R of the front body F. The other portion, that is, the left leg surrounding portion 3L of the front body F and the right leg surrounding portion 3R of the front body F are fixed to the outer sheet 1 with a space therebetween.
[0015]
Further, the plurality of elastic yarns G2 on the back body B side are bundled at the left waist side 5L, the crotch part 4 and the right waist side 5R of the back body B in a state of being bundled in the outer sheet. The other portion, that is, the left leg surrounding portion 6L of the back body B and the right leg surrounding portion 6R of the back body B are fixed to the outer sheet 1 with a space therebetween. In the illustrated example, both the plurality of elastic yarns G1... Fixed on the front body F side and the plurality of elastic yarns G2 fixed on the back body B side are bundled together in the crotch portion 4. .
[0016]
Therefore, in the disposable diaper 1 of this example, the arrangement | positioning space | interval of each elastic yarn G1 ..., G2 ... is the widest in the leg periphery part 3L, 3R, 6L, 6R, and the crotch part 4 and the waist part 2L, 2R, Narrowest at 5L and 5R.
[0017]
By arranging the elastic yarns in this way, 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 waistside portions 2L, 2R, 5L, 5R is weakened. As a result, the shrinkage in the width direction of the absorbent main body 10 is reduced, and a tightening trace is less likely to be attached to the waist of the adherend. Further, in this example, in the leg surrounding portions 3L, 3R, 6L, 6R, the plurality of elastic yarns G1,..., G2. Stronger than part 4 and waistside parts 2L, 2R, 5L, 5R. Further, the leg surrounding portions 3L, 3R, 6L, 6R are in contact with the thighs of the wearer on a wider surface in the width direction. Therefore, the fitting property with respect to the base of the thigh is good, the tightening trace is not easily attached, and the side leakage preventing effect is excellent.
[0018]
On the other hand, as the elastic member or elastic yarn, natural rubber yarn or synthetic rubber yarn having an appropriate thickness and cross-sectional shape can be used. If the number of elastic yarns is also plural, it is not necessary to be three as in the illustrated example.
[0019]
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 B side are bundled together in the crotch portion 4. However, the present invention is 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 B side can be separately bundled at the crotch portion.
[0020]
In this case, a plurality of elastic yarns G1 on the front body F side and a plurality of elastic yarns G2 on the back body B side are separately bundled in the crotch portion 4, and each of the plurality of elastic yarns G1,. .. Are made to cross each other, or a plurality of elastic yarns G1 on the front body F side and a plurality of elastic yarns G2 on the back body B side are separately bundled in the crotch portion 4 and a plurality of The elastic yarns G1,..., G2.
[0021]
Further, in the above example, a plurality of elastic yarns in the crotch part and the waist side part are fixed to the outer sheet in a bundled state, and a plurality of elastic yarns in the leg periphery part are fixed to the outer sheet with a gap. However, the present invention is not limited to this.
[0022]
That is, it is only necessary that the interval between the plurality of elastic yarns at least in the crotch portion is narrower than that in the leg periphery portion. Therefore, as long as these conditions are satisfied, for example, a plurality of elastic yarns in all the parts may be arranged at intervals. Further, in the case where the mutual spacing of the plurality of elastic yarns in both the crotch part and the waist side part is narrower than the leg periphery part, the mutual spacing of the plurality of elastic threads in the crotch part and the plurality of elasticity in the waist side part The mutual interval between the yarns may be different.
[0023]
On the other hand, as shown in FIG. 1 and FIG. 2, the joint portion 30 in which the substantially entire longitudinal direction of both side edge portions of the front body F and the back body B in the present example is joined as a diaper. It is non-parallel to the center line and is positioned outward of the diaper toward the leg opening LO, thereby making it easier to put the leg.
[0024]
(About the form of the absorber)
Now, a representative example of the form of the absorbent body of the present invention is shown in FIG. That is, it has an absorbent element 13 mainly composed of cotton-like pulp having a constricted portion 13a in which both side edges of the leg equivalent position are constricted inward, and crepe papers 14A and 14B containing the absorbent element 13 Absorber AB is constituted. The absorber AB is provided between the liquid-permeable top sheet 11 and the liquid-impermeable back sheet 12 as described above and as clearly shown in FIGS.
[0025]
The crepe paper includes an upper layer crepe paper 14A having an upper flap portion that extends outwardly beyond the upper edge of the absorbent element 13 and beyond the side edges of the non-constricted part, as particularly shown in FIG. 13, lower crepe paper 14 </ b> B having a lower flap portion extending outwardly beyond the side edges of the non-constricted portion, and a folded portion that is folded back from the extending end and overlapped with the upper flap portion. ing.
[0026]
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.
[0027]
Second, even if the width of the absorbent element 13 is reduced, urine absorbability 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 layer and the lower layer crepe papers 14A and 14B outside the constricted portion 13a are present, they are not rigid and easily deformable. And you can easily put your legs.
[0028]
On the contrary, by having the constricted portion 13a in the absorbent element 13, the degree of freedom of movement of the legs is great after wearing, and good fit is exhibited around the legs.
[0029]
Third, as shown in FIG. 5 and FIG. 6 showing an embodiment having a barrier cuff, a barrier sheet 40 made of a liquid-impervious sheet or a water-repellent sheet and an elastic elastic member provided at the free end thereof When the barrier cuff is constituted by 41, when the standing edge of the barrier cuff is positioned at the constricted portion 13a or further at the outer non-constricted portion, at least the constricted portion 13a becomes a temporary pocket for soft stool. Of the upper and lower crepe papers 14A and 14B, the upper crepe paper 14A mainly acts to diffuse, and the urine diffused in the middle in the width direction or in the longitudinal direction is eventually absorbed by the absorbent element 13. become.
[0030]
Therefore, it is not necessary for the rising edge of the barrier cuff to be located within the width of the absorbent element 13, so that the rising edge of the barrier cuff can be positioned more outward, so that the free end of the barrier cuff on both sides can be located. The separation interval can be widened, so that urine and loose stool can be reliably captured even if the wearer moves excessively in the width direction.
[0031]
On the other hand, as shown in FIG. 8, the side portion of the upper crepe paper 14A may be stacked on the side portion of the lower crepe paper 14B.
[0032]
In addition, the form of the absorber of the present invention is not limited to a pants-type paper diaper, but can be applied to a tape fastener-type paper diaper as shown in FIG. A barrier cuff can also be constituted in this tape fastener type paper diaper.
[0033]
【The invention's effect】
As described above, according to the present invention, there are advantages such as having sufficient urine absorption ability as a whole, improving ease of leg passage particularly in a pant-type diaper, and improving fit around the leg.
[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 a pants-type diaper according to the present invention when not worn.
FIG. 3 is a side view thereof.
FIGS. 4A and 4B show the form of the absorber, in which FIG. 4A is a plan view and FIG. 4B is a view taken along the line B-B in FIG.
FIG. 5 is a development 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 portion.
FIG. 7 is a development view of a form example of a tape fastener paper diaper.
FIG. 8 is a schematic cross-sectional view showing the form of another absorber.
[Explanation of symbols]
P ... pants-type diaper, 1 ... outer sheet, 10 ... absorbent main body, 11 ... liquid-permeable top sheet, 12 ... liquid-impervious back sheet, 13 ... absorbent element, 13a ... constricted portion, 14A ... upper crepe paper, 14B ... lower layer crepe paper, 30 ... joint, 40 ... barrier sheet, 41 ... elastic elastic member, AB ... absorber.

Claims (3)

Both side edges of the front body and the back body are joined to form a trunk opening and a pair of left and right leg openings,
An absorbent body having an absorbent element mainly composed of cotton-like pulp having a constricted portion with both side edges constricted inward at a position corresponding to the leg circumference, and a crepe paper containing the absorbent element, is not a liquid-permeable sheet. In a pants-type paper diaper, which is provided between the liquid-permeable sheet and has barrier cuffs on both sides of the use surface side of the product.
The crepe paper has an upper crepe paper that has an upper flap portion that extends beyond the upper surface of the absorbent element and the side edge of the non-constricted portion and extends outwardly over the entire length of the absorbent element ;
A lower flap portion that extends beyond the lower surface of the absorbent element, the side edge of the non-constricted portion, and extends outward from the entire length of the absorbent element ; and a folded portion that is folded back from the extended end and overlapped with the upper flap portion. A lower layer crepe paper having
A disposable paper diaper, wherein the rising edge in the width direction of each of the barrier cuffs is positioned on the upper crepe paper outside the width of the non-buckled portion. The disposable diaper according to claim 1, wherein the joint portion of the side edge is non-parallel to the diaper center line and is located outward of the diaper toward the leg opening side. The disposable paper diaper according to claim 1 or 2, wherein 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-buckled portion, and movement in the width direction of the absorbent element is restricted. .

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