JPH0568694A - Absorptive article - Google Patents

Abstract

PURPOSE:To provide the absorptive article having antimicrobial and deodorizing properties. CONSTITUTION:This absorptive article 1 is constituted by arranging absorbent paper 5 coated or impregnated with an antimicrobial silica gel and acrylic resin on the surface or inner side of the absorber of the absorptive article consisting of a front surface material 2 having liquid permeability, a rear surface material 3 having liquid impermeability and the absorber 4 provided therebetween.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to absorbent articles such as sanitary napkins, vaginal discharge sheets, disposable diapers and the like, which have antibacterial and deodorant properties.

[0002]

2. Description of the Related Art For absorbent articles of this type, for example, sanitary napkins, various techniques have been proposed in order to improve the absorption performance. For example, super absorbent polymers have been used for the absorber, and mesh type sheets and dry non-woven fabrics have been used for liquid permeable surface materials, and the amount of liquid remaining on the surface is extremely high. Has been reduced to.

On the other hand, these absorbent articles may remain worn on the wearer's body for several hours even after absorbing excrement from the body. However, when urea, protein, etc. in excrement are kept in a holding state, they easily become a breeding bed for bacteria that are resident in the crotch and the like, and when these bacteria breed on excrement as a bed, odor is generated. Conventionally, activated carbon (see, for example, JP-A-57-142256) has been used as a means for preventing such an odor.
Japanese Laid-Open Patent Publication No. 56-3054.
Technology), powdered tea (JP-A-63-188127), plant extracts containing flavonoids and tempenes, cyclodextrin (JP-A-61-128973) and the like in an absorbent article. Is proposed.

Further, in JP-A-61-268253 and JP-A-59-95042, a material having a deodorizing and deodorizing function is kneaded into a synthetic fiber or a film to absorb the synthetic fiber or the like. Techniques used for the body and the like have been proposed. It is also possible to use an antibacterial material that suppresses the growth of bacteria as one of the deodorizing means. As a technique of such an antibacterial material, for example, a technique of supporting an antibacterial metal as an antibacterial material on an object (Japanese Patent Laid-Open No. 62-7000 and Japanese Patent Laid-Open No. 25-25).
856, JP-A-2-84957), a technique of impregnating pulp with an antibacterial agent (JP-A-63-255765), and the like. Furthermore, antibacterial silica gel and antibacterial resin having antibacterial and deodorant properties are also known as additives for rubber and paints (Japanese Patent Laid-Open No. 2922/1990).
No. 01).

[0005]

However, in the above-mentioned prior art, any of the deodorant, deodorant and antibacterial materials are used by dispersing fine particles on fibers or papers. Therefore, even if it is distributed unevenly on paper, or even if it is evenly distributed at the time of spraying, since the deodorizing material has almost no sticking force, the fine particles are unevenly distributed during the manufacturing process, product delivery, etc. There is a problem that sufficient deodorizing power and the like cannot be obtained over the entire paper or the like.

Further, if the above-mentioned antibacterial materials are simply used for absorbent articles, the antibacterial activity of these antibacterial materials is not sufficient for human excrement and the growth of bacteria is sufficiently prevented in the absorbent articles. There is a problem that it is not possible and the deodorizing power is poor. Therefore, an object of the present invention is to provide an absorbent article having antibacterial and deodorant properties.

[0007]

The present invention provides an absorbent article comprising a liquid-permeable surface material, a liquid-impermeable back material, and an absorber provided therebetween, wherein the absorber is The above object is achieved by providing an absorbent article characterized by arranging absorbent paper coated or impregnated with antibacterial silica gel and acrylic resin on the surface or inside thereof.

In the present invention, the antibacterial silica gel refers to one obtained by hydrolyzing an inorganic silicon compound or an organic silicon compound containing an antibacterial metal salt.

[0009]

In the absorbent article of the present invention, a mixture of antibacterial silica gel and an acrylic resin is used as an antibacterial material to suppress the growth of bacteria due to the excretion absorbed by the absorbent article, and the growth of the bacteria. The odor is prevented from being generated, and the odor of excrement is eliminated by the deodorizing effect of the antibacterial material.

In such deodorization, by applying or impregnating the antibacterial material to the absorbent paper, the antibacterial material is uniformly dispersed in the absorbent paper without uneven distribution, and a sufficient deodorizing effect is exerted on the entire absorbent paper. Give.

[0011]

EXAMPLES The absorbent article of the present invention will be described below using a sanitary napkin as an example. The sanitary napkin 1 according to the embodiment of the present invention shown in FIG. 1 is composed of a liquid-permeable surface material 2, a liquid-impermeable back material 3, and an absorbent body 4 provided therebetween. The article is characterized in that an absorbent paper 5 coated or impregnated with antibacterial silica gel and acrylic resin is arranged on the surface or inside of the absorbent body.

The surface material 2 is preferably a liquid-permeable sheet that allows excrement to permeate into the absorbent body 4 and has a feeling similar to underwear. Examples of such a liquid-permeable sheet include woven cloth and non-woven cloth. , A porous film and the like are preferable. In addition, by applying a hydrophobic compound such as a silicone oil or paraffin wax to the peripheral portion of the surface material 2, or by applying a hydrophilic compound such as an alkyl phosphate ester in advance and washing the peripheral edge with warm water, By performing water treatment, it is possible to prevent leakage due to bleeding of urine or the like at the peripheral portion.

As the backing material 3, a liquid impermeable and vapor permeable sheet that is made by adding a filler to a thermoplastic resin and stretched is used, and has a feel close to that of underwear, such as a film. A composite material of a non-woven fabric or a composite material of a film and a woven fabric is used. Absorber 4
It is preferable to use defibrated pulp as a main material together with a high-molecular water-absorbing polymer, and also preferable to use a mixture of a thermoplastic resin, cellulose fiber, and a high-molecular water-absorbing polymer which is heat-treated. The location of the high-molecular water-absorbing polymer is
It may be an upper layer, a middle layer or a lower layer, or may be a mixture with pulp. The high-molecular water-absorbing polymer is
It is preferable to use particles in the form of particles having a retention property capable of absorbing and retaining 20 times or more of its own weight and having a property of gelling. As such a high molecular water-absorbing polymer, starch-acrylic acid (salt) can be used. Graft copolymers, saponified products of starch-acrylonitrile copolymers, crosslinked products of sodium carboxymethyl cellulose, acrylic acid (salt) polymers and the like are preferable. The shape is preferably an hourglass shape according to the wearer's body shape, but may be rectangular.

The absorbent paper 5 is arranged on the surface of or inside the absorbent body 4, but in the present embodiment, it is arranged so as to wrap the absorbent body 4. The absorbent paper 5 is coated or impregnated with antibacterial silica gel and acrylic resin. However, in absorbent paper mainly composed of cellulose, the acrylic resin does not hinder the absorbability and is excellent in adhesiveness. Therefore, it prevents the antibacterial silica gel from falling off.

The antibacterial silica gel is obtained by hydrolyzing an inorganic silicon compound and an organic silicon compound containing an antibacterial metal salt, and is disclosed in detail in, for example, JP-A-2-292201, and silver, copper, etc. The metal salt or the like is dissolved in water to prepare a mixed aqueous solution, an inorganic silicon compound is added thereto, an organic silicon compound and a hydrophilic organic solvent are further mixed, and in this state, hydrolysis and polycondensation are carried out for production.

The above antibacterial silica gel has a basis weight of 1 to 6 g /
It is preferably contained in the absorbent paper 5 in m ² , and particularly preferably ² to 5 g / m ² . This is because if it is less than 1 g / m ² , the antibacterial activity and deodorizing power are not sufficient, and if it is more than 6 g / m ^2, more than the predetermined effective effect depending on the added amount cannot be obtained. The acrylic resin is applied or impregnated on the absorbent paper 5 together with the antibacterial silica gel. In this case, apply or impregnate the acrylic resin with a mixture of antibacterial silica gel in advance, or after applying or impregnating the acrylic resin,
It may be applied with antibacterial silica gel.

The proportion of the antibacterial silica gel and the acrylic resin is preferably 2 to 5 parts by weight with respect to 100 parts by weight of the former. If the mixing ratio of the acrylic resin is less than 2 parts by weight based on 100 parts by weight of the antibacterial silica gel, the adhesion will be poor and the antibacterial silica gel will fall off from the absorbent paper during the production line or during transportation. If it exceeds, the coating property of the acrylic resin is increased and the absorbent paper becomes water-repellent and impairs absorption, which is not preferable. Further, an additive such as a water-soluble organic solvent is added to this in an amount of 10 to 10.
It is also possible to add 15 parts by weight.

As the acrylic resin, commercially available products are usually used. In the coating method, a normal coating method such as spraying or brushing is used, and in the impregnation method, a normal impregnation method of dipping in a liquid or the like is performed. By using antibacterial silica gel together with acrylic resin in this way, it is possible to exert unprecedented antibacterial properties in absorbent articles that absorb human excrement and to deodorize excrement by its deodorizing action. You can

Next, the operation of this embodiment will be described.
The excrement such as menstrual blood excreted from the human body passes through the surface material 2 and is absorbed by the absorbent body 4 via the absorbent paper 5. Absorber 4
The excrement absorbed in is absorbed by the absorbent paper 5 covering it, and the antibacterial action and deodorizing action of the absorbent paper 5 prevent the generation of the odor of the excrement.

That is, the indigenous bacteria in the crotch of the human body try to proliferate by using the absorbent body 4 containing excrement as a breeding bed, but the proliferation is suppressed by the antibacterial silica gel surrounding the absorbent body 4. Moreover, the antibacterial silica gel can exhibit its antibacterial property particularly when used together with an acrylic resin, as compared with other resins. In this way, the growth of bacteria is suppressed, the generation of odor caused by the growth of bacteria is prevented, and the deodorizing power of the antibacterial silica gel deodorizes.

In addition, at the time of manufacturing the sanitary napkin 1, since the antibacterial material is applied or impregnated, the antibacterial material does not drop off as has been conventionally caused. That is, conventionally
When fine particles such as deodorizing material were sprayed on the mixed paper, the fine particles were separated in the manufacturing process and caused troubles in the production line, but such troubles do not occur in the present invention.

Next, specific examples of the absorbent article of the present invention will be described. A sanitary napkin having the structure shown in FIG. 1 was prepared and its deodorizing effect was compared with that of a conventional one. (Practical product) As the surface material 2, a commercially available surface layer of Lori liner (trade name: manufactured by Kao Co., Ltd.) is used, and a polyethylene sheet is used as the back surface material 3 and a defibrated pulp is mainly used as the absorbent material 4. I used one.

The absorbent paper 5 contained 4 g of an antibacterial material having the composition shown in Table 1 below as an antibacterial silica gel and an acrylic resin.
It was applied at a basis weight of m ² . (Comparative product) A sanitary napkin having the same structure as that of the above-described specific example was prepared, and absorbent paper (0 g / m ² ) not coated with the above-mentioned antibacterial agent was prepared. Using a conventional activated carbon sheet as an absorption sheet,
This was designated as Comparative Product 2.

(Deodorant test) The above-described product and comparative product 1,
The following deodorant test was performed on No. 2. The results are shown in Table 2 below. 1g of egg yolk was applied as a simulated excrement to each product and comparative products 1 and 2, put in a glass bottle, and at 40 ° C,
It was stored in an environment variable room with a humidity of 80%, and the odor was judged every day.

The determination was carried out by 5 subjects for the occurrence of mold and the presence or absence of malodor. The results are shown in Table 2 below. ⊚: No offensive odor is felt and no mold is generated. ..

◯: Almost no bad odor was observed, and almost no mold was generated. Δ: A foul odor was slightly felt, and mold was partially generated. X: A foul odor was felt, and mold was generated on the entire surface. XX: A foul odor was felt severely, and mold was also seriously generated. As can be seen from Table 2 above, it is of course that no offensive odor is felt in the product of the present embodiment after 1 day.
Even after 7 days and 7 days, no significant odor was felt, and almost no mold was generated, which is a remarkably good effect as compared with the conventional products (Comparative products 1 and 2).

The present invention is not limited to the above embodiment,
Various modifications can be made without departing from the scope of the present invention.
For example, the absorbent paper impregnated with antibacterial silica gel and acrylic resin may be placed in the absorbent body or laminated in the absorbent body.

[0028]

According to the present invention, it is possible to provide an absorbent article having antibacterial properties and deodorizing properties. Further, according to the absorbent article of the present invention, since the antibacterial agent is applied to or impregnated in the absorbent paper, the antibacterial agent can be evenly arranged over the entire absorbent paper, and the antibacterial agent can be evenly distributed over the entire absorbent paper. And a sufficient deodorizing effect can be obtained.

Further, since no particulate matter is used as the deodorant, there is no uneven distribution or drop-off which can be said during the manufacturing process unlike the conventional case, so that troubles in the manufacturing process can be prevented. Furthermore, since an antibacterial agent is used, it is possible to suppress the growth of bacteria and obtain an excellent hygiene effect.

[Brief description of drawings]

FIG. 1 is a sectional view of a sanitary napkin according to an embodiment of the present invention.

[Explanation of symbols]

 1 Sanitary napkin (absorbent article) 2 Surface material 3 Back material 4 Absorber 5 Absorbent paper

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location 7603-4C A61F 13/18 380 B

Claims (2)

[Claims] 1. An absorbent article comprising a liquid-permeable surface material, a liquid-impermeable back material, and an absorbent body provided therebetween, wherein an antibacterial property is provided on the surface or inside of the absorbent body. An absorbent article comprising absorbent paper coated or impregnated with silica gel and an acrylic resin. 2. The absorbent paper comprises the antibacterial silica gel having a basis weight of 1 to 6 g / m ² , and the acrylic resin having a basis weight of 0.02 to 2.
The content of 0.3 g / m ² is included.
The absorbent article described.