JP2002330995A - Throw-away diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a throw-away diaper which enables to observe the varying amounts of urine absorption from the outside. SOLUTION: This throw-away diaper is formed by sealing water-soluble colored resins 5 together with a water absorptive core 3 between a water permeable inner sheet 2 and a transparent or translucent water impermeable outer sheet 4. The water-soluble colored resins 5 are disposed between the water absorptive core 3 and the water impermeable outer sheet 4 and the water-soluble colored resins 5 can be observed from the outer side of the throw-away diaper 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a disposable diaper.

[0002]

2. Description of the Related Art In a disposable diaper, each side edge of a diaper body in which a water-absorbent core is enclosed between a water-permeable inner sheet and a water-impermeable outer sheet has elasticity with rubber or the like, and urine leaks to the outside. It is devised not to be. Further, in order to identify the presence or absence of urine absorption in disposable diapers, a mark recognizable from the outer surface on the inner surface of the water-impermeable outer sheet may be printed with a water-soluble ink or a discolorable ink.
Japanese Patent Application Laid-Open Nos.-117608 and 59-117609.

[0003]

However, in such a disposable diaper, it is not possible to observe the amount of urine absorption, and therefore, the disposable diaper must be replaced when the urine absorption capacity is sufficient. On the other hand, there has been a problem that the disposable diaper may be stuffy and rash due to a delay in replacing the disposable diaper with a large amount of urine absorbed.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a disposable diaper in which the amount of urine absorption can be observed from the outside.

[0005]

The disposable diaper according to the first aspect of the present invention comprises a water-absorbent core and a water-soluble colored resin sealed between a water-permeable inner sheet and a transparent or translucent water-impermeable outer sheet. A disposable diaper, wherein a water-soluble colored resin is disposed between the water-absorbent core and the water-impermeable outer sheet, and the water-soluble colored resin can be observed from the outside of the disposable diaper.

A disposable diaper according to the second aspect of the present invention is a disposable diaper in which a water-soluble colored hot melt resin is enclosed between a water-permeable inner sheet and a transparent or translucent water-impermeable outer sheet together with a water-absorbing core. In addition, a water-soluble colored hot melt resin is disposed between the water-absorbent core and the water-impermeable outer sheet, and the water-soluble colored hot melt resin can be observed from the outside of the disposable diaper.

A disposable diaper according to a third aspect of the present invention is a disposable diaper in which a water-soluble colored hot melt resin is enclosed between a water-permeable inner sheet and a transparent or translucent water-impermeable outer sheet together with a water-absorbent core. A water-soluble colored hot melt resin is disposed between the water-absorbent core and the water-impermeable outer sheet, and the water-soluble colored hot-melt resin can be observed from the outside of the disposable diaper. The water-permeable outer sheet is bonded with a water-soluble colored hot melt resin.

A disposable diaper according to a fourth aspect of the present invention is a disposable diaper in which a water-soluble colored hot melt resin is enclosed between a water-permeable inner sheet and a transparent or translucent water-impermeable outer sheet together with a water-absorbent core. There are many water-soluble colored hot melt resins of the same or similar shape disposed between the water-absorbent core and the water-impermeable outer sheet, and the water-soluble colored hot melt resin is observed from the outside of the disposable diaper. It is characterized by being able to do it.

A disposable diaper according to a fifth aspect of the present invention is a disposable diaper comprising a plurality of transparent or translucent water-soluble colored resins colored in different colors together with a water-absorbent core and a water-permeable inner sheet and a transparent or translucent water-impermeable material. A disposable diaper enclosed between an outer sheet and a laminated water-soluble colored resin, wherein the laminated water-soluble colored resin is disposed between the water-absorbent core and the water-impermeable outer sheet, and the mixed water-soluble colored resin is The resin can be observed from the outside of the disposable diaper.

A disposable diaper according to a sixth aspect of the present invention is a disposable diaper in which a water-soluble colored resin is enclosed between a water-permeable inner sheet and a colored transparent or translucent impermeable outer sheet together with a water-absorbing core. Wherein the water-soluble colored resin is disposed between the water-absorbent core and the water-impermeable outer sheet, and the water-soluble colored resin can be observed from the outside of the disposable diaper.

[0011] In the disposable diaper according to any one of claims 1 to 6, the material of the water-permeable inner sheet is not particularly limited.
For example, a nonwoven fabric, a perforated resin film such as low density polyethylene (LDPE), polypropylene (PP) and the like can be mentioned.

In the disposable diaper according to any one of the first to sixth aspects of the present invention, the water-absorbing core is preferably in the form of a sheet, and is made of, for example, high water-absorbing resin particles such as polyacrylate resin particles. And mixtures with pulp. The grooves may be compression-molded on the surface so that urine can be quickly diffused.

[0013] In the disposable diaper according to the first to sixth aspects of the present invention, the material of the water-impermeable outer sheet is, for example, LDP.
Transparent polyolefin resin films such as E and PP are exemplified. The water-impermeable outer sheet may be translucent as long as it has translucency, for example, a polyolefin resin film containing inorganic particles such as titanium oxide, barium sulfate, and calcium carbonate. Good.

In the disposable diaper according to any one of the first to sixth aspects of the present invention, the material of the water-soluble colored resin disposed between the water-absorbent core and the water-impermeable outer sheet is not particularly limited. It is preferable that the adhesive has adhesiveness so that it is not necessary to apply an adhesive when fixing the water-soluble resin to either the water-absorbent core or the water-impermeable outer sheet by such means.

When the water-soluble colored resin is of a hot-melt type, it can be applied with a hot-melt-type adhesive applicator used for bonding a water-permeable inner sheet or the like, and the application amount can be easily changed. It has the advantage that.
Further, since the structure of the disposable diaper can be simplified, it may be used instead of the hot melt type adhesive used for bonding the water absorbent core and the water impermeable outer sheet.

When the water-soluble colored resin is a hot-melt type adhesive, there is an advantage that a drying step after application is unnecessary and that it can be applied to a high-speed line for producing disposable diapers.

The water-soluble colored resin should be colored with a highly distinguishable color with a dye, a pigment, a coloring agent, or the like so that the presence or absence of dissolution can be easily visually recognized from the outside of the water-impermeable outer sheet. preferable.

The water-soluble colored resin does not necessarily need to be applied to the entire surface with an equal thickness. For example, the water-soluble colored resin is applied in the form of lines such as stripes, radiation, grids, concentric circles, spirals, or the like or similar dot patterns. Alternatively, the thickness may be gradually reduced as going outward from the center.

In the disposable diaper according to the fifth aspect of the present invention, the plurality of water-soluble colored resins colored in different colors disposed between the water-absorbent core and the water-impermeable outer sheet may be water-impermeable. Solubility in water is assumed to be greatly different so that changes in mixed colors can be easily visually recognized from the outside of the outer sheet, and those having high solubility in water are arranged on the side closer to the water absorbent core. Preferably, it is provided.

For example, when a water-soluble colored resin colored red and a water-soluble colored resin colored blue are laminated from the side close to the water-absorbing core, the red and blue colors are initially Although it is mixed color and has a purple color, as the dissolution of the water-soluble colored resin colored red gradually progresses, the color changes to blue via blue purple and then to the water-soluble colored resin colored blue. As the dissolution proceeds, the color becomes lighter.

The method of arranging a plurality of water-soluble colored resins colored in different colors between the water-absorbent core and the water-impermeable outer sheet is not particularly limited. Even if one of the water-permeable outer sheets is sequentially coated with a plurality of water-soluble colored resins colored in different colors, the plurality of water-soluble colored resins colored in different colors are applied respectively. Even if the water-absorbent core and the water-impermeable outer sheet are laminated, a transparent water-permeable sheet coated with a plurality of water-soluble colored resins colored in different colors on both sides is used as the water-absorbent core and water-impermeable It may be disposed in the middle of the outer sheet or may be any.

In the disposable diaper according to the sixth aspect of the present invention, the water-impermeable outer sheet is colored with a dye, a pigment, a coloring agent, or the like to a color that can be easily identified as being mixed with a water-soluble colored resin. Is preferred.

For example, if the water-impermeable outer sheet is colored blue and the water-soluble colored resin is colored red, the red and blue are initially mixed to give a purple color, As the colored water-soluble colored resin gradually dissolves, the color changes from blue-violet to blue.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the disposable diaper according to the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view illustrating a main part of a disposable diaper according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of a main part illustrating a main part of a disposable diaper according to a second embodiment of the present invention. FIG. 3 is a sectional view showing a main part of a disposable diaper according to a third embodiment of the present invention.

In the first embodiment of the disposable diaper of the present invention shown in FIG. 1, the disposable diaper 1 comprises a water-absorbent inner sheet 2 and a transparent water-impermeable outer sheet 4. The core 3 is formed by being enclosed. The water-permeable inner sheet 2 and the water-impermeable outer sheet 4 are larger than the intermediate water-absorbent core 3 and are tightly attached all around.

Between the water-absorbent core 3 and the water-impermeable sheet 4, a water-soluble colored resin 5 having a substantially circular cross section is disposed in a striped pattern so that it can be observed from the outside of the disposable diaper 1. Have been.

Urine excreted when the disposable diaper 1 is worn passes through the water-permeable inner sheet 2 and penetrates and is absorbed by the water-absorbing core 3. When urine reaches the water-soluble colored resin 5,
The water-soluble colored resin 5 gradually dissolves and loses its original shape, and its color is reduced, and a change in the shape or surface area of the undissolved portion of the water-soluble colored resin 5 allows the amount of urine absorption to be observed from the outside. I can do it.

The water-soluble colored resin is colored in a different color,
When a plurality of water-soluble coloring resins having greatly different solubility in water are laminated, the water-soluble coloring resin having higher solubility in water, which is disposed on the side close to the water-absorbing core, is dissolved first. As a result, the original shape is lost, and the color is reduced. By changing the shape or surface area of the mixed color portion, the amount of urine absorption can be observed from the outside.

When the water-impermeable outer sheet is colored in a color that allows easy identification of the presence or absence of color mixing with the water-soluble colored resin, the water-soluble colored resin is gradually dissolved to lose its original shape and The amount of urine absorption can be observed from the outside by changing the shape or the surface area of the color portion where the color is diluted and mixed.

In the second embodiment of the disposable diaper of the present invention shown in FIG. 2, the water-soluble colored resin 5 having a substantially circular rod shape has a smaller diameter as it goes outward, so that urine is absorbed. With the progress of the dissolution, the dissolution proceeds from the small-diameter portion of the water-soluble colored resin 5, and the undissolved portion of the water-soluble colored resin 5 appears to be gradually reduced.

In the third embodiment of the disposable diaper of the present invention shown in FIG. 3, the water-soluble colored resin 5 having a substantially circular shape is made thinner toward the outside, and urine is absorbed. With the progress of the dissolution, the dissolution proceeds from the thin portion of the water-soluble colored resin 5 so that the undissolved portion of the water-soluble colored resin 5 is gradually reduced in diameter.

[0032]

The disposable diaper of the present invention is configured as described above, so that the amount of urine absorbed can be observed from the outside, and it is possible to judge the appropriate replacement time of the disposable diaper.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a main part of a disposable diaper according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a main part of a main part of a disposable diaper according to a second embodiment of the present invention.

FIG. 3 is a sectional view showing a main part of a disposable diaper according to a third embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 disposable diaper 2 water-permeable inner sheet 3 water-absorbent core 4 water-impermeable outer sheet 5 water-soluble colored resin

Claims (6)

[Claims] 1. A disposable diaper in which a water-soluble colored resin is enclosed between a water-permeable inner sheet and a transparent or translucent water-impermeable outer sheet together with a water-absorbent core, wherein the water-soluble colored resin is water-absorbent. A disposable diaper disposed between a core and the water-impermeable outer sheet, wherein the water-soluble colored resin can be observed from outside the disposable diaper. 2. A disposable diaper in which a water-soluble colored hot melt resin is enclosed between a water-permeable inner sheet and a transparent or translucent water-impermeable outer sheet together with a water-absorbent core, wherein the water-soluble colored hot melt is A disposable diaper, wherein a resin is disposed between the water-absorbent core and the water-impermeable outer sheet, and the water-soluble colored hot melt resin can be observed from outside the disposable diaper. 3. A disposable diaper in which a water-soluble colored hot melt resin is enclosed between a water-permeable inner sheet and a transparent or translucent water-impermeable outer sheet together with a water-absorbent core, wherein the water-soluble colored hot melt is A resin is disposed between the water-absorbent core and the water-impermeable outer sheet, and a water-soluble colored hot melt resin can be observed from the outside of the disposable diaper, and the water-absorbent core and the water-impermeable outer sheet are water-soluble. A disposable diaper characterized by being adhered by a colored hot melt resin. 4. A disposable diaper in which a water-soluble colored hot melt resin together with a water-absorbent core is enclosed between a water-permeable inner sheet and a transparent or translucent water-impermeable outer sheet. A disposable diaper, wherein a water-soluble colored hot melt resin having a shape is disposed between the water-absorbent core and the water-impermeable outer sheet, and the water-soluble colored hot melt resin can be observed from outside the disposable diaper. . 5. A plurality of transparent or translucent water-soluble colored resins colored in different colors together with the water-absorbing core are enclosed between the water-permeable inner sheet and the transparent or translucent impermeable outer sheet. Wherein the laminated water-soluble colored resin is disposed between the water-absorbent core and the water-impermeable outer sheet, and the mixed water-soluble colored resin is observed from the outside of the disposable diaper. Disposable diapers characterized by what they can do. 6. A disposable diaper in which a water-soluble colored resin is enclosed between a water-permeable inner sheet and a colored transparent or translucent water-impermeable outer sheet together with a water-absorbent core, wherein the water-soluble colored resin is Is disposed between the water-absorbent core and the water-impermeable outer sheet, and the water-soluble colored resin can be observed from the outside of the disposable diaper.