JPS5921702A - Diaper type wear article - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to diaper-type wearing articles.

More specifically, the present invention relates to a diaper-type wearable article having an indicator that allows the amount of urine to be determined visually.

Disposable diapers have become popular in recent years because they are easy to use.
The amount used is increasing. The quality of diapers has been improved significantly, and even if you urinate, it will be absorbed immediately by the absorbent part1, and even if a little pressure is applied, the absorbed urine will not return to the surface of the diaper. Since a one-way type member is now used on the side that contacts the skin, babies can feel comfortable even when they urinate without feeling discomfort.

Furthermore, a translucent water-impermeable sheet is used as the outermost layer of disposable diapers because it does not break during use and has a good appearance. Therefore, it is difficult to visually determine whether the baby has urinated. For this purpose, it would be convenient if it could be determined from the outside whether the baby is urinating or not.

Regarding such diapers that have a mechanism that can determine whether or not urine is urinating from the outside, Japanese Patent Application Laid-open No. 55-36326, Japanese Patent Application Laid-Open No. 56-4.3402, or Japanese Utility Model Application No. 56-2
No. 8016 is known.

These technologies can be classified as (1) those using pH indicators, (2) those that change color with ammonia (excluding pH), (
3) those that change color due to flea white matter in urine, (4) those that develop color when dissolved in water, and (5) those that use water-soluble dyes.

In (1), there is a problem because the pH of the urine changes, and the degree of color development changes.If the urine is kept in an acidic or alkaline atmosphere, the color change may not occur, which is a problem.

(2)% (3) has the disadvantage that the degree of color development changes depending on the concentration in urine, and also has the problem of discoloration during storage.

(4)% (5) changes when it absorbs moisture, so even if you are not urinating, it will change due to sweat etc. Also, there is a problem that it will absorb moisture and change color or change during storage. .

As described above, the conventional technology uses means of chemical change or dissolution of dye, and therefore, the reality is that it does not actually function effectively for urine detection in disposable diapers.

The inventors of the present invention investigated disposable diapers that can be used to detect when a baby has urinated, and realized that the light-scattering function decreases when fine powder gets wet, which could be used to detect urine. We have finally completed the present invention.

That is, according to the present invention, there is provided a diaper type having a water-impermeable transparent or translucent cover member 1, a urine absorbing member 2, and a wet state indicating structure 3 interposed between the cover member 1 and the urine absorbing member 2. In the worn article, the wet state indicating structure 3 has a structure in which a colored layer 4 and a light scattering layer 5 are laminated,
The light-scattering layer 5 has a property that its light-scattering function decreases when wetted, and the light-scattering layer 5 is located on the cover member 1 side, or b) a light-scattering layer in which colored particles are dispersed. Provided is a diaper-type wearing article characterized in that the light-scattering function decreases when wetted with material.

The present invention will be explained below with reference to the drawings.

FIG. 1 is an end view showing a cross section of a diaper-type wearable article.

A wet state indicating structure 3 exists between the transparent or translucent cover member 1 and the urine absorbing member 2.

The cover member 1 is provided to prevent absorbed urine from penetrating the surface and to prevent damage during use. Usually a water-resistant resin film is used, which is embossed or has a small amount of filler added to make it translucent. Any resin can be used as long as it is flexible and can be made into a film, such as polyethylene or polypropylene.

It is preferable to form the wet state indicating structure 3 on the sides of the cover member 1 in advance. Of course, it is also possible to form the cover member 1 on the urine absorbing member 2 and then cover it with the cover member 1.

The wet state indicating structure includes a two-layer type (FIG. 2) and a single-layer type (FIG. 3).

In FIG. 2, the colored layer 4 is on the urine absorbing member 2 side, and the light scattering layer 5 is on the cover member 1 side.

When the light scattering layer 5 is dry, the colored layer underneath cannot be seen due to light scattering, and when it becomes wet, the light scattering function is reduced and the colored layer underneath is visible. As materials used for the light scattering layer 5, inorganic fine powders such as talc, silica gel, kaolinite, clay, rock salt, etc. can be used.

These fine powders are applied to the cover member 1 or the film used for the colored layer 4 using a suitable binding material to form the light scattering layer 5.
can be provided.

The thickness of the light scattering layer 5 varies depending on the hiding power of the fine powder, but for example, for talc or kaolinite with an average particle diameter of about 2 μm, it is about 10 μm.
~20 μm is sufficient.

The colored layer 4 may have any structure and be made of any material as long as it appears to reduce the light scattering function of the light scattering layer 5. For example, there are various methods such as using a colored film or printing colored ink on the light scattering layer 5, and any material that can be used as the colored layer 4 can be used. It is preferable that the material is water permeable, but it does not necessarily have to be water permeable.If the material is not water permeable, the light scattering layer 5 should be made larger than the colored layer 4.
Alternatively, by providing a method such as providing a gap between the light scattering layer 5 and the cover material, the usage +J function can be achieved.

When the wet state indicating structure 3 has one layer, it is sufficient to form a light scattering layer in which the frames are dispersed, so in addition to the light scattering layer 5V used in the case of two layers, Since it is not necessary to see the urine absorbing member under the light scattering layer when the function deteriorates, titanium oxide or the like can also be used. Mix an appropriate amount of these white fillers and apply or print them on the surface of the cover, or apply it to the support film and cut it appropriately, then apply adhesive to the pieces. Then attach it to the cover part 1 or the urine absorbing part 2.

When using a support film, there are no restrictions on attaching the wet state indicating structure as long as the support film is water permeable; however, if the support film is water impermeable, water permeable holes must be made or the wet state indicating structure can be attached. It is desirable to provide a gap between the body and the cover member.

As described above, the wet state indicating structure 3 is provided between the cover member 1 and the urine absorbing member 2.

A water-permeable sheet 6 made of non-woven fabric etc. is placed on the urine absorbing part 2
is attached, and the cover member 1 and the water-permeable sheet 6 are hot-melt bonded or heat-rolled at the end to form a diaper-type wearable article.

The diaper-type wearing article of the present invention is advantageous because its wet state can be detected by a decrease in light scattering function, and pH
Since it does not involve chemical changes or dissolution of test chemicals, it has good storage stability.

The present invention will be explained below with reference to Examples.

Example 1 100 parts by weight of white clay with an average particle size of 2 μm, 80 parts by weight of a 35% aqueous emulsion of ethylene/vinyl acetate copolymer, and 50 parts by weight of a 35% aqueous solution of polyvinyl alcohol were uniformly stirred to form a coating for a light-scattering layer. I made an industrial liquid. This coating solution is applied to the second half of a 30 μm thick translucent embossed polyethylene film so that circles with a diameter of 2 cm are dotted at 5 cm intervals so that the thickness after drying is 20 μm, and dried. .

On top of the coated surface, apply a mixture of 2 parts by weight of food blue No. 1 aluminum lake fine powder mixed evenly with the 2nd coating solution. Hanging 1
, 8 cm thick circles were coated to a dry thickness of 5/l and dried.

The thus obtained film with the wet state indicating structure is used as the outermost layer to form an absorbent liquid.

were stacked to a thickness of 7 mm, and a polyzolopyrene dismissal sheet was stacked on the innermost layer, and the periphery was fused with a hot melt agent to produce a disposable diaper.

When this product is dry, almost no color can be seen from the outside through the water-impermeable film, but when OmA absorbs water, the wet state indicating structure becomes wet and a blue circle can be clearly seen. Ta.

Example 2 2 parts by weight of finely pulverized food blue No. 2 aluminum lake was mixed with silica gel 98 having an average particle diameter of 2 nozm, and 10 parts of a 35% polyvinyl alcohol aqueous solution was added as a fixing agent.
After adding 0 parts by weight and stirring uniformly, it was dried. The obtained pale blue solid was pulverized to 200 mesh or less, and further pressed to obtain pellets with a thickness Q of 5 mm and a diameter of 1 cm. A disposable diaper was made in the same manner as in Example 1 by dotting and pasting these pellets on a translucent enphos polypropylene film with a thickness of 3 ('.1 p) using double-sided adhesive tape as the outermost layer. .

The disposable diaper thus obtained appeared almost colorless when viewed through a translucent embossed film, but when 100 ml of water was absorbed, the pellets absorbed the water and a clear blue color was seen.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a partial cross section of the wet state indicating structure 3 of the diaper-type wearing article of the present invention. Figure 2 il-1: A schematic cross-sectional view showing that the wet state indicating structure 3 also serves as a light scattering layer 4 and a colored layer 5. Figure 13 shows that the light scattering layered material in which colored particles are dispersed is in a wet state. FIG. 2 is a schematic cross-sectional view showing an indicating structure. In FIG. 1, the arrow mark indicates that urine is absorbed, and the eye on the arrow a side detects the urine. In FIGS. 2 and 3, the arrow A side indicates the force) septum member 1 side, and the arrow B side indicates the urine absorbing portion) l'A2 side V. 1...Cover member, 2...Urine absorbing member, patent applicant Mitsui Toatsu Chemical Co., Ltd. Figure Mencha 1 Leap figure 2 Figure 3 Figure 8

Claims (1)

[Claims] 1. Water-impermeable transparent or translucent cover member 1;
In a diaper-type wearing article having a urine absorbing member 2 and a wet state indicating structure 3 interposed between the cover member 1 and the urine absorbing member 2, the wet state indicating structure 3 includes: a) a colored layer 4; It has a structure in which light scattering layers 5 are laminated, and the light scattering layer 5 has a property that its light scattering function decreases when wetted, and the light scattering layer 5 is located on the cover member 1 side, or b) A light-scattering layered material in which colored particles are dispersed, and has a property that the light-scattering mechanism decreases when wetted.