JP5088843B2 - Disposable absorbent article - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable absorbent article.
[0002]
[Prior art]
Conventionally, in a disposable absorbent article, when urination is absorbed by an absorbent sheet body having a high-density polymer absorbent material, initial absorption is easily performed by the polymer absorbent material, but in repeated absorption, the absorbent sheet Since the whole body is difficult to be used effectively, there was a problem that the absorption capacity of the whole absorbent sheet body could not be fully exhibited.
[0003]
[Problems to be solved by the invention]
In particular, in disposable absorbent articles such as disposable pants and diapers for adults, when urinating in a sitting position, the absorbent sheet body is crushed by the load of body pressure, so urinate at a speed that is absorbed. When the speed is high, urine collects inside the absorbent sheet body and leaks outside. Especially when the body pressure load is large, the absorption of urine stops at the body pressure load position, and the subsequent urination cannot reach the unabsorbed area of the absorbent sheet body, so it overflows at the body pressure load position, It becomes easier to leak outside.
[0004]
The present invention was made to solve the above-described conventional problems, and provides a disposable absorbent article that can be quickly diffused and absorbed without stopping absorption of urine, particularly at a body pressure load position in a sitting position. It is intended.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention includes an absorbent sheet body including an absorbent material and a helical flexible member that is disposed between the absorbent material in the width direction and extends in the length direction. A disposable absorbent article characterized by the above is provided.
[0006]
According to the present invention, the spiral flexible member extending in the length direction between the width directions of the absorbent material has a urine inlet / outlet that is ensured over the entire circumference due to its spiral structure, and has a total length inside. A passage for urination diffusion is secured over this. Even when the body pressure is changed particularly in the sitting position, the urine inlet / outlet and the urine diffusion passage are secured, so that urine can be quickly diffused and absorbed by the absorbent material on both sides of the urine diffusion passage. This helical flexible member naturally recovers when the body pressure load is released. In addition, the spiral flexible member has a flexibility that can easily follow the curvature of the wearer's skin surface and can easily follow the bending and twisting of the absorbent sheet due to the movement of the wearer. I don't feel it.
[0007]
Upper Symbol spiral flexible member, if it is made of metal or synthetic resin, so that recovery at body pressure unloading is performed quickly and reliably.
[0008]
The portion where the upper Symbol spiral flexible member is arranged, with the configuration substantially no absorbent material, micturition diffusion passage a helical flexible member will be able to secure.
[0009]
Above Symbol absorbent sheet body, and are attached to the skin surface side of the outer sheet, will be able to use as a disposable pants and disposable diapers.
[0010]
The upper Symbol absorber and the spiral flexible member, can be fixed to the liquid-pervious or liquid-impervious on the lower sheet, a configuration that is incorporated walnut with a tissue liquid permeable with the lower sheet .
[0011]
The upper Symbol absorber and the spiral flexible member may be configured to be fixed sandwiched between the liquid permeable top sheet and a liquid-pervious or liquid-impervious bottom sheet.
[0012]
Upper Symbol absorbent material, the configuration comprising only the polymeric absorbent material is preferred.
[0013]
Upper Symbol absorbent material can be configured to become in admixture with the pulp material and the polymeric absorbent material.
[0014]
The upper surface of the upper Symbol absorbent sheet, preferably a liquid diffusion sheet is disposed.
[0015]
The upper surface of the upper Symbol absorbent sheet, preferably a pair of left and right leak-proof steric flap is arranged.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0017]
1 is an exploded perspective view of the disposable pants 1, FIG. 2 is a plan view in an unfolded state, FIG. 3 is a front view in a completed state, FIG. 4 is an enlarged sectional view taken along line AA in FIG. FIG.
[0018]
The disposable pants 1 are basically composed of an exterior sheet body 2 and a water absorbent sheet body 3.
[0019]
The exterior sheet body 2 includes a first exterior (outer surface) sheet 4, a second exterior (skin surface) sheet 5, leg elastic yarns 6, and waist elastic yarns 7.
[0020]
The first exterior sheet 4 and the second exterior sheet 5 are formed in the outer shape of the disposable pants 1, and leg openings S are formed on both sides of the crotch R between the front abdomen P and the back part Q. Has been.
[0021]
Each of the exterior sheets 4 and 5 is made of a synthetic fiber nonwoven fabric excellent in air permeability, and the upper surface of the first exterior sheet 4 has a semicircular shape for leg elasticity along the opening edge of each leg opening S. The elastic portion for leg is formed by attaching the yarn 6 in the extended state, and the elastic yarn 7 for the waist is attached in the extended state along the upper edge of the front abdominal portion P and the back portion Q. The elastic part for use comes to be formed.
[0022]
And the exterior sheet | seat body 2 comes to be formed by adhere | attaching the 2nd exterior sheet | seat 5 in the state which pinched | interposed each said elastic yarn 6 and 7 on the upper surface of this 1st exterior sheet | seat 4. As shown in FIG.
[0023]
For each of the elastic yarns 6 and 7, polyurethane yarn, polyurethane film, natural rubber, foamed urethane or the like can be used, and not only one but also a plurality may be provided.
[0024]
The water absorbent sheet body 3 basically includes a lower sheet 9, an absorbent material 10, and a flexible member 11.
[0025]
The lower sheet 9 is set to be narrower than the inner width of the leg elastic portion of the exterior sheet 2, and the length is set to be shorter than the length of the exterior sheet body 2.
[0026]
The lower sheet 9 is preferably made of a liquid-permeable synthetic fiber nonwoven fabric, a liquid-impervious synthetic resin (for example, polyethylene) film, or a water-repellent (waterproof) treated synthetic fiber nonwoven fabric.
[0027]
As shown in FIG. 5, an absorbent material 10 having a constant width w1 and extending in the length direction with a constant interval w2 is bonded to the upper surface of the lower sheet 9. .
[0028]
As the absorbent material 10, particles or a fibrous polymer absorbent material are adhered to the upper surface of the lower sheet 9 with a hot-melt adhesive sprayed on the upper surface of the lower sheet 9. As the polymer absorbent material, it is preferable to use a polyacrylate-based material having a large water absorption amount and a high water absorption rate.
[0029]
Then, a urine diffusion passage 10a having a cross-sectional area corresponding to the interval w2 and the thickness t is formed between the widths w1 of the absorbent material 10.
[0030]
The absorbent material 10 is preferably composed only of a polymer absorbent material, but is a mixture of a polymer absorbent material (for example, 50 to 60%) and a pulp material (for example, 50 to 40%, including thermal bonding fibers). There may be. The absorbent material 10 is not limited to these materials.
[0031]
In the interval w2 between the absorbent materials 10 on the upper surface of the lower sheet 9, the length is almost the same as the absorbent material 10, and more preferably slightly shorter than the upper and lower ends of the absorbent material 10 in the longitudinal direction. A spiral flexible member 11 that is long and extends in the length direction is disposed. The spiral flexible member 11 may be bonded using the above-mentioned curtain sprayed hot-melt adhesive, or will not fall off if wrapped in a tissue 13 described later without bonding.
[0032]
As shown in FIG. 6, the spiral flexible member 11 is a spiral body (coil spring shape) made of a flexible metal or thermoplastic resin, and the height (diameter) thereof is the absorbent material 10. The thickness t is equal to or less than the thickness t, for example, about 1 to 3 mm, and the wire diameter is preferably about 0.05 to 0.5 mm.
[0033]
Further, since the helical flexible member 11 lacks flexibility (flexibility) when the pitch is 0, the helical flexible member 11 is stretched about 1.5 to 2.5 times from the original length of the pitch 0 to fix the state. What was made to arrange | position is arrange | positioned in the space | interval w2 of the said absorber 10. FIG.
[0034]
Then, after applying a hot melt adhesive on the upper surface of the absorbent material 10 by spiral spraying, it is wrapped with a tissue (thin paper) 13 together with the lower sheet 9.
[0035]
Without using the tissue 13, as shown in FIG. 7A, after applying a hot melt adhesive on the upper surface of the absorbent material 10 by spiral spraying, the liquid-permeable upper sheet 14 is adhered, The absorbent material 10 and the flexible member 11 may be sandwiched and fixed between the upper sheet 14 and the lower sheet 9.
[0036]
In other words, the arrangement of the spiral flexible member 11 in the interval w2 of the absorbent material 10 is a configuration in which the absorbent material 10 does not substantially exist in the portion where the spiral flexible member 11 is disposed. However, as shown in FIGS. 7B and 7C, the absorbent material 10 can be bonded after the spiral flexible member 11 is disposed.
[0037]
For example, a hot melt adhesive is applied to the lower sheet 9 by curtain spraying, and after the spiral flexible member 11 is adhered thereto, the absorbent material 10 made of particles or fibrous polymer absorbent material is adhered, and thereafter In addition, a hot melt adhesive may be applied to the upper surface of the absorbent material 10 by spiral spray. In this case, it is preferable to consider so that the absorbent material 10 does not enter a large amount into the hollow portion of the spiral flexible member 11.
[0038]
Further, as shown in FIG. 7D, the absorbent material 10 and the spiral flexible member 11 can be laminated not only in one stage but also in two or more stages.
[0039]
The water absorbent sheet body 3 is bonded and fixed to a predetermined position on the upper surface of the waterproof sheet 15 adhered to the second exterior (skin surface) sheet 5 of the exterior sheet body 2, and both side portions 15 a of the waterproof sheet 15 are water absorbent sheet. By rolling up and adhering to the upper part on both sides of the body 3, side leakage from the water absorbent sheet body 3 is prevented.
[0040]
A liquid-permeable surface sheet 16 that covers the upper surface of the water-absorbent sheet body 3 is bonded to the upper portions of the side portions 15a wound around the waterproof sheet 15.
[0041]
It is preferable to dispose a liquid diffusion sheet 17 such as a bulky nonwoven fabric or a mesh sheet on the upper surface of the absorbent sheet body 3. In this case, urine can be diffused quickly.
[0042]
Moreover, it is preferable to arrange a pair of left and right leak-proof three-dimensional flaps 18 on the upper surface of the absorbent sheet body 3. In this case, side leakage from the water absorbent sheet body 3 can be reliably prevented. Each three-dimensional flap 18 is preferably made of a synthetic fiber nonwoven fabric which is water-repellent or waterproof at least on the inner surface side, and the outer surface is a hydrophilic fiber which is not water-repellent or waterproofed from the viewpoint of touch. Preferably, it may be a hydrophobic fiber.
[0043]
A flap elastic yarn 19 is attached to the upper folded portion 18a of each three-dimensional flap 18 in an expanded state, so that the upper folded portion 18a of each three-dimensional flap 18 rises naturally. The flap elastic yarn 19 may be a polyurethane yarn or the like, similar to the elastic yarns 6 and 7, and may be provided with not only one but also a plurality.
[0044]
The three-dimensional flaps 18 are provided in the second exterior (skin surface) of the exterior sheet body 2 by allowing the lower end portion 18b to sink into the lower part of the water absorbent sheet body 3 while being separated in the width direction of the absorbent sheet body 3. By adhering to the sheet 5 and adhering the upper end portion 18c to the surface sheet 16, the absorbent sheet body 3 with the three-dimensional flap is configured.
[0045]
Then, the exterior sheet 2 including the water absorbent sheet body 3 is folded in two back and forth with the crotch portion R as a boundary, and the both side edges 1a of the front abdomen P and the back part Q are joined to each other as a disposable pant 1. 3 assembled into a finished state.
[0046]
The operation of the water absorbent sheet body 3 of the disposable pants 1 configured as described above will be described. The spiral flexible member 11 of the water-absorbing sheet body 3 has a spiral structure so that a urine inlet / outlet is ensured over the entire circumference and a urine diffusion passage 10a is ensured over the entire inner length.
[0047]
And as shown in FIG.6 (c), even if it deform | transforms at the time of the body pressure load in the seating state of the wearer M, since the urination entry / exit and the passage 10a for urination diffusion are ensured, of the passage 10a for urination diffusion Since urine can be quickly diffused and absorbed by the absorbent material 10 on both sides, even when the speed of urination is faster than the absorbed speed, there is less risk of urine leaking out.
[0048]
When releasing the body pressure load when the wearer M stands up after urination (see FIG. 6B), the spiral flexible member 11 is quickly restored by elasticity, so that the urine diffusion passage 10a is restored. Therefore, the entire absorbent material is effectively used not only in the initial absorption but also in the repeated absorption, so that the absorption capacity of the entire absorbent sheet 3 can be sufficiently exhibited.
[0049]
Furthermore, the helical flexible member 11 has flexibility that can easily follow the curvature of the skin of the wearer M and can easily follow the bending and twisting of the absorbent sheet body 3 due to the movement of the wearer M. , Does not make you feel uncomfortable or stiff.
[0050]
Since the spiral flexible member 11 is a spiral body made of metal or synthetic resin, it has a high resilience, so that the restoration at the time of releasing the body pressure load is performed quickly and reliably.
[0051]
Further, as shown in FIG. 4 or FIG. 5, when the absorbent material 10 is not substantially present at the portion where the spiral flexible member 11 is disposed, the hollow flexible member 11 absorbs the hollow flexible member 11. Since the material 10 does not enter, the urine diffusion passage 10a can be reliably secured, so that the urine can be absorbed quickly and stably at all times.
[0052]
In the said embodiment, although the water absorbing sheet body 3 was used for the disposable pants 1, it can also be used for the disposable diaper which can replace the water absorbing sheet body 3, or the water absorbing sheet body 3 can be used alone. is there.
[0053]
【Effect of the invention】
As is apparent from the above description, the present invention ensures that the spiral flexible member extending in the length direction between the width directions of the absorbent material has a urine inlet / outlet around the entire circumference due to its spiral structure. At the same time, a passage for urination diffusion is secured over the entire inner length. Even when the body pressure is changed particularly in the sitting position, the urine inlet / outlet and the urine diffusion passage are secured, so that urine can be quickly diffused and absorbed by the absorbent material on both sides of the urine diffusion passage. This helical flexible member naturally recovers when the body pressure load is released. In addition, the spiral flexible member has a flexibility that can easily follow the curvature of the wearer's skin surface and can easily follow the bending and twisting of the absorbent sheet due to the movement of the wearer. I don't feel it.
[0054]
Further, when the helical flexible member is a helical body made of metal or synthetic resin , the restoration at the time of releasing the body pressure load can be performed quickly and reliably.
[0055]
Furthermore, if the configuration in which the spiral flexible member is arranged is substantially free of absorbent material , the spiral flexible member can ensure a passage for urination diffusion with the spiral flexible member. Can absorb.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of disposable pants.
FIG. 2 is a plan view of the unfolded state.
FIG. 3 is a front view of a completed state.
4 is an enlarged sectional view taken along line AA in FIG. 2;
FIG. 5 is a perspective view of a water absorbent sheet body.
6A is a perspective view, FIG. 6B is a side view of releasing when a body pressure is loaded, and FIG. 6C is a side view of when a body pressure is loaded.
FIGS. 7A to 7D are side views of modified examples of the water absorbent sheet body, respectively.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disposable pants 2 Exterior sheet body 3 Water absorbing sheet body 9 Lower sheet 10 Water absorbing material 11 Helical flexible member 13 Tissue 14 Upper sheet 17 Liquid diffusion sheet 18 Three-dimensional flap

Claims (11)

It is provided with an absorbent sheet body including an absorbent material and a coil spring-like helical flexible member made of metal or synthetic resin having a diameter of 1 to 3 mm and disposed in the absorbent material and extending in the length direction. A disposable absorbent article characterized by A plurality of the absorbents extending in the length direction are arranged at intervals in the width direction,
The disposable absorbent article according to claim 1, wherein the helical flexible member is disposed between the absorbent materials . Above the site where the helical flexible member is disposed, a disposable absorbent article according to claim 1 or 2, wherein a configuration in which intake Osamuzai absence.   The said absorbent sheet body is a disposable absorbent article in any one of Claims 1-3 attached to the skin surface side of an exterior sheet | seat.   The absorbent material and the spiral flexible member are fixed on a liquid-permeable or liquid-impervious lower sheet, and are wrapped with a liquid-permeable tissue together with the lower sheet. A disposable absorbent article according to any one of the above.   The absorbent material and the helical flexible member are sandwiched and fixed between a liquid-permeable upper sheet and a liquid-permeable or liquid-impervious lower sheet. Disposable absorbent articles.   The disposable absorbent article according to any one of claims 1 to 6, wherein the absorbent material comprises only a polymer absorbent material.   The disposable absorbent article according to any one of claims 1 to 6, wherein the absorbent material is a mixture of a pulp material and a polymer absorbent material.   The disposable absorbent article according to any one of claims 1 to 8, wherein a liquid diffusion sheet is disposed on the upper surface of the absorbent sheet body.   The disposable absorbent article according to any one of claims 1 to 9, wherein a pair of left and right leak-proof three-dimensional flaps are disposed on the upper surface of the absorbent sheet body.   The disposable absorbent article according to any one of claims 1 to 10, wherein five helical flexible members extending in the length direction are arranged in the width direction.

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