JPH0559602A - Disposable diaper - Google Patents

Abstract

PURPOSE:To provide the subject diaper having a structure where a wetness- retaining sheet composed of a high-fiber density upper layer and a low-fiber density under layer is laminated in the central area of a liquid-permeable inside sheet made of a non-woven fabric and capable of making a baby himself feel excretion in a wearing state. CONSTITUTION:In disposable diaper 1 made of a ground fabric having a structure in which a liquid absorbing core 6 is sandwiched between a liquid-permeable inside sheet 4 made of a non-woven fabric and a liquid-impermeable outside sheet 5 and having a body opening part 2 and a pair of leg opening parts 3 to which respective elastic stretch members 7 and 8 are bonded, a wetness- retaining sheet 11 composed of a high-fiber density upper layer 11a and a low- fiber density under layer 11b made of a non-woven fabric having a lower fiber density than that of the inside sheet 4 is laminated at least in the central area of the inside sheet 4 so that the wettability of the wetness-retaining sheet 11 may be higher than that of the inside sheet. Thus, the objective disposable diaper 1 capable of making a baby himself feel his excretion in a wearing state can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to disposable training pants. More specifically, the present invention relates to so-called training pants that an infant wears in order to quickly habituate the infant from a diaper wearing habit to a diaper-free life.

[0002]

2. Description of the Related Art Generally, conventional training pants are made of cloth and can be washed and used repeatedly.
When an infant excretes while wearing pants, excreted liquid easily leaks from the pants. Therefore, it has an effect of giving discomfort to the infant and notifying the mother of the excretion.

[0003]

However, the training pants need not only be washed, but also excrete liquid easily leaks from the pants, so that the floor surfaces of indoor tatami mats, carpets, etc. are soiled.

Unlike the conventional cloth-made pants, the present invention forms a pants that absorbs excretion liquid and does not leak, and nevertheless allows the infant to sense that the pants are wet with the excretion liquid. The issue is how to configure.

[0005]

According to the present invention for solving the above-mentioned problems, a liquid-absorbent core is interposed between a liquid-permeable inner surface sheet and a liquid-impermeable outer surface sheet, and elastic elastic members are attached respectively. Disposable training pants having an opened trunk opening and a pair of leg openings.

Wetness sensing means is provided in at least the central region of the inner sheet. The wetness sensing means comprises the inner surface sheet portion in the central region and a wetness holding sheet laminated on the upper surface thereof. The wet retention sheet is a nonwoven fabric composed of an upper layer having a high fiber density and a lower layer having a low fiber density. The fiber density of the inner sheet is higher than the fiber density of the lower layer. The wetting property of the wetness holding sheet is higher than the wetting property of the inner surface sheet.

In a preferred embodiment, the inner sheet is made of a stretch elastic material and the wet retaining sheet is partially joined to the inner sheet.

[0008]

According to the training pants of the present invention having the above-mentioned structure, the excreted liquid remains in the upper layer of the wetness holding sheet. That's why. That is, the wetting property of the wet holding sheet is higher than the wetting property of the inner sheet, and between the upper layer of the wet holding sheet and the inner sheet, there is a lower layer of the wet holding sheet having a fiber density lower than that of the inner sheet. Since the lower layer is sparse and the capillary action is less than that of the upper layer and the inner sheet with high fiber density, the excreted liquid in the upper layer does not directly receive the suction force of the core located inside the pants. Because. Therefore, the infant senses the wetness from the upper layer of the wetness holding sheet.

An embodiment of the training pants according to the present invention will be described below with reference to the drawings.

1 to 3, the pants 1 has a trunk opening 2 and a pair of leg openings 3. Pants 1
Is a liquid-permeable inner surface sheet 4, a liquid-impermeable outer surface sheet 5,
It is composed of a sheet- or mat-shaped liquid-absorbent core 6 interposed therebetween. Elastic members 7 and 8 are attached between the inner and outer surface sheets 4 and 5 forming the trunk opening 2 and the leg opening 3 respectively, while being stretched with an adhesive. The pants 1 are the pants 1 in the unfolded state shown in FIG.
In the center of the pants, the pants are vertically folded so that the inner sheet 4 is located on the inner surface, and the opposite side portions 9 except the leg openings 3 are intermittently fusion-bonded. A wetness holding sheet 11 is laminated in the central area of the inner sheet 4.

The inner sheet 4 comprises thermoplastic and hydrophobic crimped fibers such as polypropylene and polyester, and hydrophilic fibers such as rayon acetate and the like in an amount of 0 to 5 if necessary.
0% by weight was mixed, and the sheet-like morphology was imparted by the fluid entanglement method. Stretchability in vertical and horizontal directions, basis weight 25-40 g / m ² , density 0.06-
It is composed of 0.15 g / cm ³ non-woven fabric. The outer sheet 5 is formed by integrally bonding a nonwoven fabric substantially the same as the inner sheet 4 and a plastic or rubber-based stretchable film (not shown) to the inner surface of the nonwoven fabric. Instead of this, a non-woven fabric that is stretchable and stretchable and liquid-impermeable or liquid-resistant may be used. The core 6 is formed by molding a mixture of fluff pulp, thermoplastic and hydrophobic crimped fibers, and superabsorbent polymer powder into a sheet or mat shape, and covering with a water-absorbent tissue paper 10.

The wetness holding sheet 11 includes hydrophilic fibers such as rayon acetate (including fibers such as polyester whose surface is hydrophilized) and, if necessary, thermoplastic and hydrophobic fibers such as polypropylene and polyester. 0-5
It is composed of a basis weight of 20 to 45 g / m ² and a density of 0.025 to 0.12 g / cm ³ , which are mixed by less than 0% by weight and are given a sheet form by a melt bond method or a fluid entanglement method. The wetness holding sheet 11 has a width of 40 to 100 mm and a length of 60 to 24.
It is preferably 0 mm. Furthermore, the wet holding sheet 11
Is composed of an upper layer 11a having a high fiber density and a lower layer 11b having a low fiber density. The fiber density of the lower layer 11b is lower than that of the inner sheet 4. The basis weight and the density of the wet holding sheet 11 are determined by the upper and lower layers 11a, 11
This is for the entire sheet 11 including b. Lower layer 1
1b is formed by loosely raising fibers from the upper layer 11a,
The density is extremely lower than that of the upper layer 11a. Such a sheet 11 comprises a fibrous web for the upper layer 11a and a lower layer 11a.
It can be manufactured by superposing it with the fiber web for b and making it into a nonwoven fabric by the melt bond method or the hydroentangling method.

Whether the non-woven fabric which is the inner sheet 4 is a mixture of hydrophobic fibers and hydrophilic fibers, and whether the non-woven fabric which is the wet retention sheet 11 is a mixture of hydrophilic fibers and hydrophobic fibers, Further, the problem of the basis weight / density of the inner sheet 4 and the wet holding sheet 11 should be determined by the relative control of the wetting characteristics of the inner sheet 4 and the wet holding sheet 11 with respect to the excreted liquid. In terms of wettability, it is necessary that the wetness holding sheet 11 is higher than the inner surface sheet 4 in view of its purpose of use, and generally, if the above-mentioned numerical conditions are satisfied, the purpose of the present invention is Can be achieved.
However, the present invention is not limited to the above numerical values.

To hold the wet holding sheet 11 in a laminated state with respect to the inner surface sheet 4, the adhesive pattern 1 in which the wet holding sheet is applied to the inner surface sheet 4 in stripes in the length direction thereof.
It is done by joining at 2. Such partial or intermittent joining does not hinder the lateral expansion and contraction elasticity of the inner sheet 4, and
Although it is preferable in order to easily form a space between the wet holding sheet 11 and the wet holding sheet 11, a pattern extending in the width direction of the wet holding sheet 11 or a dot shape arranged at appropriate intervals may be used. In the case of such partial joining, when the inner surface sheet 4 contracts, a gap is created between the inner surface sheet and the wet holding sheet 11, and the residual ratio of excreted liquid in the upper layer 11a of the wet holding sheet 11 and thus the wetness sensing effect are further enhanced. Can be increased.

As shown in FIGS. 5 and 6, when the outer peripheral edge 11c of the wet holding sheet 11 is fused to the inner surface sheet 4 under heat and pressure, the outer peripheral edge 11c is crushed to form a seal line. Since it is formed, it is effective in preventing the excreted liquid absorbed by the wet holding sheet 11 inside the seal line from going outside the seal line. Therefore, the excreted liquid in the wet holding sheet 11 flows to the outside and the pants 1
Difficult to leak from the crotch edge.

[0016]

EFFECTS OF THE INVENTION According to the training pants of the present invention, as described in the above section, the excreted liquid remains on the upper layer of the moisturizing holding sheet and comes into contact with the infant's skin. Therefore, this moisturizing holding sheet gives the infant an unpleasant feeling, senses that the infant has excreted by himself, and makes a habit of notifying others of the excretion while using the pants.

On the other hand, in the training pants according to the present invention, it is possible to prevent the excretion liquid from leaking through the core and the outer sheet, so that the floor surface is not polluted by the leakage of the excretion liquid.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of training pants according to the present invention.

FIG. 2 is a perspective view of a developed inner surface of the pants in which a part is cut away.

3 is an enlarged cross-sectional view taken along line XX in FIG.

4 is a partially enlarged cross-sectional view of FIG.

5 is an enlarged sectional view taken along the line YY in FIG.

6 is an enlarged cross-sectional view of another embodiment taken along line YY in FIG.

[Explanation of symbols]

 2 Trunk opening 3 Leg opening 4 Inner sheet 5 Outer sheet 6 Core 7,8 Stretchable elastic member 11 Wet holding sheet 11a Upper layer 11b Lower layer

Claims (2)

[Claims] 1. A torso opening and a pair of leg openings in which a liquid-absorbent core is interposed between a liquid-permeable inner sheet and a liquid-impermeable outer sheet made of a non-woven fabric, and elastic elastic members are attached respectively. In the disposable training pants having, a wetness sensing means is provided in at least a central region of the inner sheet, and the wetness sensing means comprises the inner sheet portion in the central region, and a wetness holding sheet laminated on an upper surface thereof. Which is a nonwoven fabric composed of an upper layer having a high fiber density and a lower layer having a low fiber density, and the fiber density of the inner sheet is higher than the fiber density of the lower layer, The training pants, wherein the wetting property of the wetness holding sheet is higher than the wetting property of the inner surface sheet. 2. The training pants according to claim 1, wherein the inner sheet is made of a stretch elastic material, and the wet retaining sheet is partially bonded to the inner sheet.