JP2001286503A - Body fluid absorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a body fluid absorber allowing inexpensive deodorization and sterilization and capable of suppressing dioxin generation during incineration disposal. SOLUTION: A deodorization effect is provided, breeding of fungi can be suppressed, and dioxin generation can be suppressed, by employing solid alkaline material or solid acid material as deodorant 7. The deodorant 7 is arranged on the part facing to a back seat 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bodily fluid absorbing material, and more particularly to a bodily fluid absorbing material capable of performing inexpensive deodorization and sterilization and suppressing dioxin generation during incineration.

[0002]

2. Description of the Related Art Body fluids (sweat, urine) generated from the human body are mainly composed of salt, urea, lactic acid (sweat), uric acid (urine), and ammonia. These bodily fluids have almost no odor at the time of sweating and urination because ammonia is combined with lactic acid and uric acid, but over time, ammonia gas is generated due to decomposition of lactic acid and uric acid and becomes odor. Urine odor substances include hydrogen sulfide, sulfur compounds of methyl mercaptan, and the like, in addition to ammonia.

As a countermeasure against these odors, an adsorbent which adsorbs chlorine dioxide gas (Japanese Patent No. 2669871) and an adsorbent for silver-containing glass powder (Japanese Patent Publication No. 6-5104) have conventionally been used.
No. 5), and recently, Japanese Patent Application Laid-Open No.
A polymer absorbent having antibacterial properties described in 208787 is actually used.

[0004]

However, the deodorizing effect of these products is not yet sufficient, and in the field of nursing for infant diapers and especially elderly people, products having a more inexpensive and high deodorizing effect have been developed. It has been demanded.

[0005] In addition, fungi such as Escherichia coli generated from feces may affect not only the user himself, but also the caregiver and the health of the handler in the case of being spilled into general garbage. As a countermeasure, the above-mentioned antimicrobial polymer absorbent is only partially used.

On the other hand, regarding the dioxin problem, which has been regarded as a problem in recent years, the amount of dioxin generated by incineration of domestic sewage sludge in 1990 is estimated to be 5 g-TEQ / year, and the effects of these human emissions can be neglected. Absent.

[0007] The population of people ages 65 and over in the whole country in 1996 was about 19 million, 15.1% of the total population.
It is said to exceed 25% a year. The concentration of chlorine in urine is 0.6 to 1.2% by mass, and assuming that the daily amount of urine for an adult is 1000 ml, about 40,000 to 80,000 tons of chlorine is excreted annually. The amount of dioxins generated during incineration of diapers for the elderly can be expected to increase with this population increase, but no product has been developed to address this problem.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a body fluid absorbing material which can perform deodorization and sterilization at low cost and can suppress generation of dioxin during incineration. I do.

[0009]

According to the present invention (claim 1), a liquid-impermeable backsheet, a peripheral end portion is fixed to a predetermined portion of the backsheet, and a bag portion is formed inside the backsheet. A bodily fluid absorbing material including a bag forming member and an absorbent body accommodated in the bag portion and capable of absorbing bodily fluid, wherein a solid alkaline substance is provided between the back sheet and the absorbent body or inside the absorbent body. And at least one selected from the group consisting of solid acidic substances.

[0010] The backsheet is liquid impermeable. The bag forming member has a peripheral end portion fixed to a predetermined portion of the back sheet. A bag portion is formed inside by the bag forming member and the back sheet. It is desirable that the bag forming member has a multilayer structure such as a two-layer structure of an absorbent on the inside and a nonwoven fabric on the outside.

[0011] The absorbent body is housed in this bag portion and can absorb body fluid. At least one selected from the group consisting of a solid alkaline substance and a solid acidic substance is disposed between the back sheet and the absorber or inside the absorber. Examples of the solid alkaline substance include an alkali metal salt, an alkaline earth metal salt, and an alkaline earth hydroxide.

Specifically, sodium hydrogen carbonate, sodium carbonate, calcium carbonate, sodium sesquicarbonate, magnesium hydroxide, sodium citrate, and sodium acetate are preferred.

On the other hand, as the solid acidic substance,
, Succinic, tartaric, citric acid are applicable. Mi
Alum is R₂SO₄・ R '(SO₄)₃・
24H ₂O is a generic term for double salts represented by O, where R is N
a, NH₄, Cs, Rb, Tl, R 'as Al, C
r, Fe, Ce, In, V, Co, Ti, Mn
Substance.

The solid alkaline substance neutralizes acidic sulfur compounds, and the solid acidic substance functions to neutralize alkaline ammonia. In addition, such alkaline substances and acidic substances have been found to have an effect of suppressing the growth of fungi such as Escherichia coli and pathogenic Escherichia coli. Considering irritation to human skin, it is preferable that the acid is weakly acidic, so that both a solid alkaline substance and a solid acidic substance are preferably used.

For this reason, it neutralizes and deodorizes hydrogen sulfide and sulfur compounds such as methyl mercaptan, lactic acid and uric acid, which are sources of ammonia, which are generated from body fluids adhered to and absorbed by the body fluid absorbent, and lactic acid and uric acid which are sources of ammonia. It can suppress the odor generated by the body fluid and the growth of bacteria such as Escherichia coli.

Further, according to the above-mentioned solid alkaline substance, when the body fluid absorbing material is incinerated after use, the hydrogen chloride gas generated by chlorine contained in these products and body fluid is neutralized, and dioxin is removed. Generation can be suppressed.

Further, the present invention (claim 2) is characterized in that the body fluid absorbing material is a diaper or a body fluid absorbing pad.

Further, the present invention (claim 3) is characterized in that the solid alkaline substance is contained in an amount of 0.1 to 10 g.

Normally, a disposable diaper has an ability to absorb about 300 g of urine for an adult, and for example, 4.2 to 8.4 g of sodium bicarbonate in an equimolar amount to chlorine in the urine. Therefore, by disposing a corresponding amount of the solid alkaline substance in the body fluid absorbing material, chlorine that contributes to the generation of dioxin during combustion becomes a harmless inorganic chlorine compound, and the generation of dioxin is suppressed. In addition, when the diaper material contains a chlorinated organic substance, it also has a dioxin production suppressing effect.

The amount of the solid alkaline substance added is 0.1 to 10 g in order to prevent dioxin and obtain a deodorizing effect.
Is preferred. Less than 0.1 g has very little effect.
If the amount exceeds 0 g, the production cost becomes high and the water absorption of the absorber may be impaired.

Furthermore, the present invention (claim 4) is characterized in that the solid acidic substance is contained in an amount of 0.1 to 10 g.

With respect to the deodorizing effect, the amount of the solid acidic substance is preferably 0.1 to 10 g for the same reason as that of the solid alkaline substance.

Further, according to the present invention (claim 5), the solid alkaline substance and the solid acidic substance have a particle diameter of 20 to 4%.
It is characterized in that it is 00 μm. .

The particle diameter of the solid alkaline substance and the solid acidic substance is preferably 20 to 400 μm from the viewpoint of easy handling and arrangement. When it is less than 20 μm, dust is generated at the time of handling, and it passes through the inside of the flocculent pulp absorbent, which causes problems such as difficulty in arrangement, and is not preferable.
If it exceeds, the deodorizing effect is reduced due to the decrease in the surface area, and it is necessary to arrange a larger amount, which is not preferable.

Further, the present invention (claim 6) is characterized in that sodium hydrogen carbonate is provided between the back sheet and the absorber or inside the absorber.

Furthermore, the present invention (claim 7) is characterized in that alum is disposed between the back sheet and the absorber or inside the absorber.

[0027]

Embodiments of the present invention will be described below. FIG. 1 is a sectional view of a disposable diaper according to an embodiment of the present invention. In FIG. 1, the back sheet 1 of the disposable diaper 10 has liquid impermeability. This back sheet 1
Is provided on a predetermined portion of the upper surface of the peripheral end portion 2a of the absorbent paper 2 which is an absorbent.
Is fixed, and the absorbent paper 2 is swelled inward and upward. A bag 3 is formed between the bulging portion 2 b of the absorbent paper 2 and the back sheet 1.

The peripheral end 4a of the nonwoven fabric 4 is fixed on the upper surface of the peripheral end 2a of the absorbent paper 2 in an overlapping manner. Non-woven fabric 4
The bulging portion 4b is also bulged upward so as to match the shape with the bulging portion 2b of the absorbent paper 2. Absorber 5 is uniformly packed in bag 3 so as to follow the shape of absorbent paper 2.

The absorber 5 is made of cotton pulp.
A polymer absorbent 6 is provided in a lower layer of the absorber 5, and a deodorant 7 is provided in a further lower part facing the back sheet 1. The deodorant 7 uses a mixture of sodium bicarbonate as a solid alkaline substance and alum as a solid acidic substance.

In such a configuration, by using a solid alkaline substance or a solid acidic substance for the deodorant 7, a deodorizing effect can be obtained. The reason why the deodorant 7 is disposed in the portion facing the back sheet 1 is that if the deodorant 7 is disposed closer to the nonwoven fabric 4 on the upper surface than the polymer absorbent 6, it will affect the absorption capacity of the polymer absorbent 6. That's why. In addition, the deodorizing effect is also reduced.

The addition amount of the solid alkaline substance is preferably 0.1 to 10 g in order to prevent dioxin.
If the amount is less than 0.1 g, the effect is extremely small. Also,
4 to 9 g, which is close to the equimolar amount with chlorine in urine, is even more preferred. The solid alkaline substance may consist of a single solid alkaline substance, or may be a mixture of a plurality of solid alkaline substances.

On the other hand, the deodorizing effect is preferably such that the amount of the solid alkaline substance added is 0.1 to 10 g.
If the value exceeds, the production price becomes high, which is not preferable. Further, the addition amount of the solid alkaline substance is still more preferably 1 to 3 g from the results of Examples described later.

For the deodorizing effect, the amount of the solid acidic substance is preferably 0.1 to 10 g for the same reason as the amount of the solid alkaline substance. Further, from the results of the examples described later, it is even more preferable that the amount is 1 to 3 g.

The particle diameter of the solid alkaline substance and the solid acidic substance is preferably 20 to 400 μm from the viewpoint of easy handling and arrangement. When it is less than 20 μm, dust is generated at the time of handling, and it passes through the inside of the flocculent pulp absorbent, which causes problems such as difficulty in arrangement, and is not preferable.
If it exceeds, the deodorizing effect is reduced due to the decrease in the surface area, and it is necessary to arrange a larger amount, which is not preferable. In order to facilitate these arrangements and increase the surface area, the thickness is preferably 100 to 300 μm.

It is desirable to use sodium hydrogen carbonate as the solid alkaline substance. Sodium bicarbonate has an effect of suppressing the generation of ammonia gas, which is presumed to be due to the prevention of decomposition of lactic acid and uric acid, and exhibits a high deodorizing effect by these actions.

The solid alkaline substance and the solid acidic substance have been found to have an effect of suppressing the growth of fungi such as Escherichia coli and pathogenic Escherichia coli. Table 1 shows the results of a test of the effect of sodium bicarbonate on the growth of Escherichia coli and pathogenic Escherichia coli in sand.

[0037]

[Table 1]

In this test method, a bacterial solution of Escherichia coli (E. coli) separated and identified from a clinical sample was applied to 1 kg of sand containing Escherichia coli and pathogenic Escherichia coli (the bacterial solution concentration was Mcfar).
10 ml) and mixed, and pathogenic Escherichia coli O-157: H separated and identified from clinical specimens.
7 obtained by adjusting the bacterial solution to a concentration Mcfarland 6
0 ml was added and mixed, and 100 g of these were collected and placed in a transparent polyethylene bag to produce a plurality of the same.

Nothing was added to one of the bags, a base sample for comparison was used, and each of the additives shown in Table 1 was added to the other bags.
Each concentration shown (Ratio of additive mass to sand mass)
And shaking the bag well to mix the additives uniformly in the sand. About the sample thus obtained, the number of E. coli and the number of pathogenic E. coli per 1 g of the sample were measured immediately after mixing (30 minutes to 1 hour after mixing) and after standing for 48 hours.

The sample after mixing was put in a polyethylene bag and kept in a dark place at room temperature (25 ° C.) until the number of bacteria was measured, and the number of bacteria is shown as an average value obtained by measuring twice. The number of bacteria of Escherichia coli was measured on a DHL agar medium, and the measurement of pathogenic Escherichia coli was performed by counting the clear colonies on a Solvit MC plate agar medium and confirming them by a serum antibody method. Table 1 shows the number of bacteria per gram of sand.

Further, by disposing the solid alkaline substance, chlorine contributing to the generation of dioxin during combustion becomes a harmless inorganic chlorine compound, thereby suppressing the generation of dioxin. In addition, when the diaper material contains a chlorinated organic substance, it also has a dioxin production suppressing effect.

[0042]

EXAMPLES (Example 1) Table 2 shows the results of the deodorizing test according to the present invention.

[0043]

[Table 2]

The test method was as follows: a diaper to which 1 g, 2 g, and 3 g of sodium bicarbonate having an average particle diameter of 250 μm was added, and 100 g of the same urine were respectively applied to a diaper to which no addition was made, and immediately after the application, 2 hours and 10 hours later. Measure the odor. Use a freezing pack to store diapers after adding urine. Measure odor intensity by a six-step method set by the Ministry of Health and Welfare, and portable odor sensor XP-329 (substrate type thick film semiconductor sensor) manufactured by Cosmos Electric Co., Ltd. Ammonia odor measurement was carried out.

The criterion for odor intensity measurement by the six-step method is as follows. 0: Odorless 1: Smell that can be perceived at all 2: Smell that is easy to understand what smell 3: Smell that can be easily perceived 4: Strong smell 5: Intense smell

A sufficient odor reduction effect was also observed in the results of the odor intensity measurement by the six-step method, and a reduction in ammonia was also observed in the ammonia odor measurement result obtained by the portable odor sensor manufactured by Cosmos Electric. As for the amount of sodium hydrogencarbonate added, a sufficient effect can be obtained even with 1 g, but a higher effect can be obtained by increasing the added amount.

(Example 2) A diaper to which 1 g of sodium bicarbonate having an average particle size of 250 μm and an alum having an average particle size of 110 μm were added, and a diaper to which 3 g of alum having an average particle size of 110 μm alone was added, and an average particle size of 200 μm Table 3 shows the results of a test conducted in the same manner as in Example 1 except that diapers to which 3 g of calcium carbonate alone was added were prepared and the amount of urine was 200 g.

[0048]

[Table 3]

The deodorizing effect of alum and calcium carbonate was observed.

[0050]

As described above, according to the present invention, at least one selected from the group consisting of a solid alkaline substance and a solid acidic substance is provided between the back sheet and the absorber or inside the absorber. Therefore, it has a deodorizing effect, can suppress the growth of fungi, and can suppress the generation of dioxin.

[Brief description of the drawings]

Fig. 1 Cross section of disposable diaper

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Back sheet 2 (2a, 2b) Absorbing paper 3 Bag part 4 (4a, 4b) Nonwoven fabric 5 Absorber 6 Polymer absorbent 7 Deodorant 10 Disposable diaper

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 3B029 BA04 BA11 BD15 BD17 BD21 BD22 4C098 AA09 CC19 CC22 DD04 DD05 DD10 DD20

Claims (7)

[Claims] 1. A back sheet impermeable to liquid, a bag forming member having a peripheral end fixed to a predetermined portion of the back sheet and forming a bag inside, and housed in the bag to absorb body fluid. A bodily fluid absorbent comprising a possible absorbent, wherein at least one selected from the group consisting of a solid alkaline substance and a solid acidic substance is disposed between the back sheet and the absorbent or inside the absorbent. A bodily fluid absorbing material characterized by being made. 2. The body fluid absorbing material according to claim 1, which is a diaper or a body fluid absorbing pad. 3. The method according to claim 1, wherein the solid alkaline substance is 0.1 to 10%.
The bodily fluid absorbing material according to claim 1, wherein g is contained. 4. The body fluid absorbing material according to claim 1, wherein the solid acidic substance is contained in an amount of 0.1 to 10 g. 5. The solid alkaline substance and the solid acidic substance have a particle size of 20 to 400 μm.
The body fluid absorbing material according to 2, 3 or 4. 6. The body fluid absorbing material according to claim 1, wherein sodium bicarbonate is provided between the back sheet and the absorber or inside the absorber. 7. The body fluid absorbing material according to claim 1, wherein an alum is provided between the back sheet and the absorber or inside the absorber.