JPS61272050A - absorbent articles - 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 [Field of Industrial Application] The present invention relates to absorbent articles such as disposable disposable diapers, sanitary napkins, and postpartum pads. More specifically, the present invention relates to an absorbent article having sterilizing and deodorizing abilities.

[Background of the Invention] Well-known absorbent paper, cotton-like pulp, and superabsorbent polymers are used as absorbent materials for absorbent articles such as disposable disposable diapers. In addition, a liquid-permeable nonwoven fabric is used as the top sheet of these absorbent articles, and a liquid-impermeable material such as polyethylene film is used as the back sheet.

These disposable absorbent articles do not come in direct contact with the skin, and when they absorb bodily excreta, such as urine, they generate unpleasant odors. In the case of urine, urea, amino acids, and other substances in the urine are broken down by microorganisms, producing an ammonia odor, which is a cause of diaper rash.

Regarding menstrual odor, it is also known that excreted amino acids and the like are decomposed and produce a strange odor.

Conventionally, as a means to prevent these odors, a method of mixing activated carbon, zeolite, etc. into an absorbent material has been proposed, but there have been problems such as increased cost.

In addition, a method using copper chlorophyllin salt to impart sterilizing properties to absorbent articles has been proposed (Japanese Utility Model Application Publication No. 5/1-30920), but none has yet been satisfactory.

[Purpose of the invention]

An object of the present invention is to provide an absorbent article with sterilizing and deodorizing properties at a low cost.

[Structure of the invention]

The present invention provides a disposable absorbent article having a water-absorbing layer between a liquid-permeable top sheet and a liquid-impermeable back sheet. As a result of intensive studies to solve the problems in the prior art mentioned above, we have found that by adding a clathrate compound of cyclodextrin and ethyl alcohol to the water absorbent material, we can sterilize absorbent articles.
They have also discovered that it is extremely effective in preventing bad odors generated during use, and have completed the present invention.

It has long been known that ethyl alcohol has a bactericidal effect on microorganisms, but there are problems in that ethyl alcohol is highly volatile, so the effect does not last long, and it has a unique odor. was there.

The present inventors investigated a method for maintaining the bactericidal effect and deodorizing effect over a long period of time by eliminating alcohol odor and preventing volatilization while maintaining the bactericidal effect of alcohol. The present invention was completed by discovering that the bactericidal effect of ethyl alcohol can be stably maintained by adding a compound to the absorbent material.

Cyclodextri used in the present invention is a nine-oligosaccharide in which glucose is cyclically bonded through α-1,4 glucosidic bonds, and is produced from starch using a special enzyme. There are three types of cyclodextrins each having 6.7.8 glucose molecules, and they are called α, β, and rcyclodextrin/, respectively. The cyclodextrin of the present invention means α, β, r cyclodextrin or a mixture thereof.

In carrying out the present invention, it is also possible to mix cyclodextrin and ethyl alcohol in advance and spray and add the mixture of cyclodextrin and ethyl alcohol to the absorbent material in the form of a solution. It is also possible to add the inclusion compound of cyclodextrin and ethyl alcohol to the absorbent material in powder form by means such as freeze-drying.

The mixing ratio of cyclodextrin and ethyl alcohol is preferably 1.0 to 110 parts by weight of ethyl alcohol to 1.0 parts by weight of cyclodextrin, and zO to 5.0 parts by weight.
Parts by weight are particularly preferred.

The addition rate of the cyclodextrin and ethyl alcohol mixture to the absorbent article is α05 to 2.0% by weight as ethyl alcohol to the absorbent material, preferably α1 to 15% by weight.
It is.

Cyclodextrin and ethyl alcohol (also known as cyclodextrin) are commonly used in the food industry, and are harmless food additives for the human body, making them extremely safe sterilizers and deodorizers for absorbent articles.

FIG. 1 shows a cross-sectional view of a disposable disposable diaper containing a mixture of cyclodextrin and ethyl alcohol according to the present invention.

In Fig. 1, numeral 1 is nonwoven fabric, 2 and 7 are absorbent paper, and 3
．． 5 is flocculent pulp, 4Fi, super absorbent polymer, 6 is an inclusion compound of cyclodextrin and ethyl alcohol,
8 indicates a polyethylene sheet.

EXAMPLES Next, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to these Examples in any way.

Example 1 1.0 parts by weight of β-cyclodextrin (Seldex-N, manufactured by Nihon Shokuhin Kako Co., Ltd.), ethyl alcohol (
A solution (partially precipitated) consisting of 2.5 parts by weight of special grade reagent) and 2.5 parts by weight of water was prepared, and in the process of making flocculent pulp from the valve seat, ethyl alcohol was sprayed onto the flocculent pulp. It was added so that the addition rate was α5 weight percent, and a paper diaper having the structure shown in FIG. 1 was produced using this cotton-like pulp. Details of each configuration are as follows.

1. Non-woven fabric, 2. Water-absorbing paper, five-line pulp 300t/m”
,4. Super absorbent polymer 4097m", S flocculent pal 7'
300 f/α2, &β cyclodextrin and ethyl alcohol clathrate compound This diaper was placed in a plastic bag, sealed and stored.

Example 2 A mixture consisting of 1.0 parts by weight of β-cyclodextrin (Nippon Shokuhin Kako Co., Ltd., Seldex-N), 1.5 parts of ethyl alcohol, and 5 parts of water was stirred and lyophilized to obtain β-cyclodextrin. A powder of cyclodextrin and ethyl alcohol mixture was obtained.

The ethyl alcohol concentration of Kono powder was 4 parts and 1%.

A paper diaper similar to that in Example 1 was made using this powder. The amount of the inclusion compound of cyclodextrin and alcohol added is cL as ethyl alcohol to cotton pulp.
It was added in an amount giving a proportion of 3 weight percent.

The diapers prepared in Examples 1 and 2 were tested for sterilization and wearability. The results are shown in Table-1. A similar test was also conducted on commercially available diapers, and the results are shown in Table 1 as Comparative Examples 1 and 2.

Table-1 Bactericidal test is SC! A portion of the diaper surface material nonwoven fabric was placed on a DLP-agar medium and cultured, and each of 10 samples was tested for the presence or absence of mold growth.

The wear test was conducted with 5 babies as monitors who used each diaper for 10 days.
The subjects were asked to compare the presence or absence of diaper rash and the odor of used diapers.

[Brief explanation of drawings]

FIG. 1 shows a schematic cross-sectional view of a disposable disposable diaper to which a cyclodextrin (cyclodextrin) and ethyl alcohol clathrate of the present invention is added.

Claims (1)

[Claims] 1. A disposable absorbent article having a water-absorbing layer between a liquid-permeable top sheet and a liquid-impermeable back sheet, the absorbent article containing an inclusion compound of cyclodextrin and ethyl alcohol in the water-absorbing layer.