JP6956462B2 - Absorbent article - Google Patents

Description

The present invention relates to sheets for absorbent articles and absorbent articles. The present invention also relates to a method for producing them.

A technique for applying an antibacterial action to a user's skin by using paper such as tissue paper to which an antibacterial agent is applied is known. For example, Patent Document 1 describes an absorbent article in which an antibacterial agent and activated carbon are applied between an absorbent core and a surface sheet. Patent Document 2 proposes a tissue paper to which an antibacterial agent is added for the purpose of reducing irritation to the skin at the time of blowing the nose. Patent Document 3 proposes an antibacterial wipe for cleaning the surface of the skin and controlling the growth and viability of bacteria. This wipe contains an antibacterial agent.

Japanese Unexamined Patent Publication No. 2006-19966 JP-A-2007-195936 Special Table 2002-540898

According to the technique described in each of the above-mentioned patent documents, a certain degree of antibacterial effect is exhibited. However, it has been desired that the site where the antibacterial effect is exhibited stays at the site where the antibacterial agent is applied, and that a higher antibacterial effect is exhibited. Further, a method of applying an antibacterial agent so as to exhibit a high antibacterial effect is not described in these patent documents.

Therefore, an object of the present invention is to improve an article containing an antibacterial agent, and more specifically, to improve the antibacterial property of a sheet for an absorbent article and an absorbent article as compared with the conventional case. Another object of the present invention is to provide a sheet for an absorbent article having high antibacterial properties and a method capable of easily producing an absorbent article.

The present invention provides a sheet for an absorbent article containing an organic hydrophobic antibacterial agent, a hydrophilic and non-volatile organic solvent, and 10% by mass or less of water.

Further, the present invention is a step of incorporating an antibacterial agent solution containing an organic hydrophobic antibacterial agent, a hydrophilic and non-volatile organic solvent, and 8% by mass or less of water into the sheet as a suitable method for producing the sheet. Provided is a method for producing a sheet for an absorbent article having the above.

Further, the present invention is an absorbent article having a step of containing an antibacterial agent solution containing an organic hydrophobic antibacterial agent, a hydrophilic and non-volatile organic solvent, and 30% by mass or less of water in a sheet and then drying the sheet. It provides a method for manufacturing a sheet for use.

The present invention also provides an absorbent article comprising an absorbent core containing an organic hydrophobic antibacterial agent and a hydrophilic and non-volatile organic solvent.

The present invention comprises a step of incorporating an antibacterial agent solution obtained by dissolving an organic hydrophobic antibacterial agent in a hydrophilic and non-volatile organic solvent in an absorbent core as a suitable method for producing the above-mentioned absorbent article. It provides a method for producing a sex article.

According to the present invention, a sheet for an absorbent article having high antibacterial properties and an absorbent article are provided. Further, according to the present invention, a sheet for an absorbent article having high antibacterial properties and an absorbent article can be easily produced.

Hereinafter, the present invention will be described based on its preferred embodiment. The sheet for an absorbent article of the present invention is suitably used as one of the constituent members of an absorbent article. Absorbable articles broadly include articles used for absorbing body fluids discharged from the human body, such as urine, menstrual blood, loose stools, and sweat, and include disposable diapers, sanitary napkins, sanitary shorts, and the like. Specific application examples of the absorbent article sheet include a coated sheet that covers at least the skin-facing surface side of the absorbent core. This covering sheet is also called a core wrap sheet. Examples of the absorbent core coated on the coating sheet include a mixed product of flap pulp and a water-absorbent polymer, a deposit of only an absorbent polymer, and a triple product of only fluff pulp. An absorber is formed by covering at least the skin-facing surface side of the absorbent core with a coating sheet. A surface sheet is arranged on the skin-facing surface side of the covering sheet. Other application examples of sheets for absorbent articles include surgical gowns, bandages, adhesive plasters, bed sheets, pillowcases, which are used for medical, industrial materials, life-related materials, etc., and in particular, which require antibacterial performance. Examples include absorbent paper for armpit pads and antibacterial paper for shoes.

The absorbent article sheet is preferably a base sheet containing an antibacterial agent and an organic solvent. The antibacterial agent may be used alone or in combination of two or more. Similarly, as the organic solvent, one type can be used alone, or two or more types can be used in combination. The sheet for absorbent articles may contain water, but the content of water is preferably 10% by mass or less with respect to the mass of the sheet for absorbent articles from the viewpoint of antibacterial performance. The content of water of 10% by mass or less is approximately equal to the amount of water that is inevitably naturally absorbed from the surrounding environment when the absorbent article sheet is placed in the surrounding environment. The amount of water contained in the sheet for absorbent articles is measured according to the Japanese Industrial Standards JIS P8127 paper and paperboard-lot moisture test method-dryer (105 ° C ± 2 ° C, drying time 30 minutes or more). ..

The absorbent article sheet preferably has liquid permeability. From this point of view, the base material sheet constituting the absorbent article sheet is preferably a fiber sheet or a perforated sheet in which a plurality of through holes are formed in the film. Examples of the fiber sheet include paper, non-woven fabric, woven fabric, woven fabric, and composite materials thereof. The substrate sheet constituting the sheet for absorbent articles preferably has a basis weight of 50 g / m ² or more, more preferably 70 g / m ² or more, and more preferably 100 g / m ² or more. More preferred. Further, it is preferably 1000 g / m ² or less, more preferably 500 g / m ² or less, and even more preferably ^{300 g / m 2 or less.} The basis weight of the absorbent article sheet ^{is preferably 10 g / m 2} or more and 50 g / m ² or less, more preferably 12 g / m ² or more and 40 g / m ² or less, and 13 g / m ² or more and 35 g / m / m. It is more preferably m ^{2 or less.}

It is preferable that the base sheet is provided with an antibacterial agent solution containing an antibacterial agent and an organic solvent to form the sheet for absorbent articles of the present invention. The antibacterial agent solution may contain water, but the content of water should be 8% by mass or less based on the mass of the antibacterial agent solution to ensure the stability of the antibacterial agent solution and the content of the antibacterial agent solution. It is preferable from the viewpoint of suppressing foaming and precipitation of the antibacterial agent. The content of water of 8% by mass or less is approximately equal to the amount of water that is inevitably naturally absorbed from the surrounding environment when the antibacterial agent solution is placed in the surrounding environment. The analytical methods including the qualitative analysis of whether or not the sheet for absorbent articles contains an antibacterial agent and the quantitative analysis when it is contained are as follows.
Analytical method: From a commercially available product, weaken the adhesive force of the adhesive using a cold spray or the like, and carefully peel off each material. First, fluorescent X-ray diffraction is performed on each material to confirm whether or not it contains a metal. For agents other than metals (antibacterial agents, organic solvents), after immersing each material in a methanol solution, the agent contained in the methanol solution is fractionated by HPLC or the like. The compound contained in the fraction is identified by using an NMR measuring instrument or the like. The concentration of the methanol solution is calculated and quantified by using LC-UV or the like.
Further, the sheet for absorbent articles of the present invention may be composed by applying an antibacterial agent solution containing 30% by mass or less of water to the base sheet. In that case, after applying the antibacterial agent solution to the base sheet, a step of removing water by drying is provided. As the drying means, a well-known method such as blowing hot air or following a heated roll can be used without limitation.

The antibacterial agent and the organic solvent may be uniformly present throughout the absorbent article sheet. Alternatively, the antibacterial agent and the organic solvent may be locally present at a specific site in the absorbent article sheet. In any case, the abundance of the antibacterial agent in the absorbent article sheet ^{is preferably 0.02 g / m 2} or more, more preferably 0.04 g / m ² or more, and 0.05 g. It is more preferably / m ^{2 or more.} Further, it is preferably 0.5 g / m ² or less, more preferably 0.4 g / m ² or less, and further preferably 0.3 g / m ² or less. The abundance of the antibacterial agent in the sheet for absorbent articles ^{is preferably 0.02 g / m 2} or more and 0.5 g / m ² or less, and 0.04 g / m ² or more and 0.4 g / m ² or less. more preferably, it is more preferably 0.05 g / ^{m 2} or more 0.3 g / ^{m 2} or less. This abundance is calculated based on the total area of the absorbent article sheet even when the antibacterial agent is locally present.

The abundance of the organic solvent in the absorbent article sheet ^{is preferably 0.1 g / m 2} or more, more preferably 0.2 g / m ² or more, and more preferably 0.4 g / m ² or more. More preferred. Further, it is preferably 20 g / m ² or less, more preferably 15 g / m ² or less, and even more preferably ^{12 g / m 2 or less.} The abundance of the organic solvent in the absorbent article sheet ^{is preferably 0.1 g / m 2} or more and 20 g / m ² or less, more preferably 0.2 g / m ² or more and 15 g / m ² or less, and 0. it is more preferably .4g / ^{m 2} or more 12 g / ^{m 2} or less. This abundance is calculated based on the total area of the absorbent article sheet even when the organic solvent is locally present.

The ratio of the amount of the antibacterial agent used to the amount of the organic solvent used is preferably 4 times or more, more preferably 5 times or more, and 8 times or more the mass of the organic solvent with respect to the mass of the antibacterial agent. Is more preferable. Further, it is preferably 1000 times or less, more preferably 100 times or less, and further preferably 50 times or less. The mass of the organic solvent is preferably 4 times or more and 1000 times or less, more preferably 5 times or more and 100 times or less, and further preferably 8 times or more and 50 times or less with respect to the mass of the antibacterial agent. .. Setting the ratio of both within this range is preferable because the solubility of the antibacterial agent and the ease of applying the antibacterial agent solution are improved, and the uniform coating property at the time of spraying or spraying is improved.

In the present invention, instead of the absorbent article sheet containing the antibacterial agent and the organic solvent, or in addition to this, an embodiment in which the absorbent core contains the antibacterial agent and the organic solvent can be adopted. In this embodiment, it is preferable that the abundance of antimicrobials in the absorbent core is 0.01 g / ^{m 2} or more, further preferably 0.05 g / ^{m 2} or more, 0.1 g / ^{m 2} or more Is more preferable. Further, it is preferably 10.0 g / m ² or less, more preferably 5.0 g / m ² or less, and even more preferably ^{2.0 g / m 2 or less.} Abundance of antimicrobials in the absorbent core is more preferably not less 0.01 g / ^{m 2} or more 10.0 g / ^{m 2} or less and preferably, 0.05 g / ^{m 2} or more 5.0 g / ^{m 2} or less , 0.1 g / m ² or more and 2.0 g / m ² or less is more preferable. This abundance is calculated based on the total area of the absorbent core even when the antibacterial agent is locally present.

On the other hand, that existing amount of the organic solvent in the absorbent core is preferably 0.01 g / ^{m 2} or more, and further preferably 0.02 g / ^{m 2} or more, 0.05 g / ^{m 2} or more More preferred. Further, it is preferably 10 g / m ² or less, more preferably 5 g / m ² or less, and even more preferably ^{3 g / m 2 or less.} The abundance of the organic solvent in the absorbable core ^{is preferably 0.01 g / m 2} or more and 10 g / m ² or less, more preferably 0.02 g / m ² or more and 5 g / m ² or less, and more preferably 0.05 g. It is more preferably / m ² or more and 3 g / m ^{2 or less.} This abundance is calculated based on the total area of the absorbent core even when the organic solvent is locally present.

When the absorbent core contains an antibacterial agent and an organic solvent, the ratio of the amount of the antibacterial agent used to the amount of the organic solvent used is the same as when the sheet for the absorbent article contains the antibacterial agent and the organic solvent. It can be the same as the ratio.

The absorbent core may contain water, but the water content is preferably 10% by mass or less with respect to the mass of the absorbent core. The reason for this is as described above. The content of water of 10% by mass or less is approximately equal to the amount of water that is inevitably naturally absorbed from the surrounding environment when the absorbent core is placed in the surrounding environment. The amount of water contained in the absorbent core is measured by the same method as the amount of water contained in the absorbent article sheet described above.

Regardless of whether the antibacterial agent is contained in the absorbent article sheet or the absorbent core, it is preferable that an organic compound is used as the antibacterial agent. This is because the organic antibacterial agent has a higher antibacterial effect than the inorganic antibacterial agent such as zinc oxide and silver-containing antibacterial agent. Further, as the antibacterial agent, a hydrophobic one is preferably used. This is because the hydrophobic antibacterial agent has lower skin irritation than the hydrophilic antibacterial agent. Since the hydrophilic antibacterial agent is hydrophilic, it easily penetrates into the skin, and as a result, it easily irritates the skin. In contrast, hydrophobic antibacterial agents are less likely to penetrate the skin due to their hydrophobicity and tend to stay on the surface of the skin, thus being less irritating to the skin. The hydrophobicity of the antibacterial agent means that the solubility in water at 25 ° C. is 40 g or less, preferably 10 g or less, and more preferably 1 g or less. The solubility of the antibacterial agent can be measured by the following method. A sufficiently dried antibacterial agent is added to 100 g of pure water at 25 ° C., and the antibacterial agent is dissolved by stirring with a stirrer or a shaker. The solubility in water at 25 ° C.

As described above, it is preferable to use an organic hydrophobic antibacterial agent in the present invention. As the organic hydrophobic antibacterial agent, for example, it is preferable to use an organic compound represented by the following formula (1) or (2). This is because these organic compounds have a high antibacterial effect and low skin irritation. These organic compounds may be used alone or in combination of two or more.

In the organic hydrophobic antibacterial agent represented by the formula (1), the ^{number of carbon atoms in R 1} and R ² is preferably 6 or more, and preferably 8 or more, respectively, excluding the methyl group and the ethyl group. It is even more preferably 10 or more, still more preferably 24 or less, even more preferably 22 or less, and even more preferably 20 or less. Specifically, it is preferably 6 or more and 24 or less, more preferably 8 or more and 22 or less, and even more preferably 10 or more and 20 or less.

In the organic hydrophobic antibacterial agent represented by the formula (1), the ^{number of carbon atoms in R 3} and R ⁴ is preferably 6 or more, and preferably 8 or more, respectively, excluding the methyl group and the ethyl group. More preferably, it is even more preferably 10 or more, and even more preferably.
Further, it is preferably 30 or less, more preferably 24 or less, and even more preferably 22 or less. Specifically, it is preferably 6 or more and 30 or less, more preferably 8 or more and 24 or less, and even more preferably 10 or more and 22 or less.

In the organic hydrophobic antibacterial agent represented by the formula (1), when R ³ and / or R ⁴ is an alkylalkylene oxide group, the number of carbon atoms of the alkyl group in the group is preferably 6 or more, and 8 It is more preferably 24 or less, and further preferably 22 or less. Specifically, it is preferably 6 or more and 24 or less, and more preferably 8 or more and 22 or less. The number of carbon atoms of the alkylene group in the alkylalkylene oxide group is more preferably 2 or more, more preferably 6 or less, and further preferably 4 or less. Specifically, it is preferably 2 or more and 6 or less, and more preferably 2 or more and 4 or less.

In the organic hydrophobic antimicrobial agent of formula (2), the number of carbon atoms in R ⁵ is preferably 1 or more, still more preferably 3 or more, even more preferably 6 or more, also It is preferably 30 or less, more preferably 24 or less, and even more preferably 22 or less. Specifically, it is preferably 1 or more and 30 or less, more preferably 3 or more and 24 or less, and even more preferably 6 or more and 22 or less.

In the organic hydrophobic antibacterial agent represented by the formula (2), when R ⁵ is a cycloalkyl group, the number of carbon atoms in the group is preferably 6 or more, more preferably 7 or more, and further. It is preferably 30 or less, and more preferably 24 or less. Specifically, it is preferably 6 or more and 30 or less, and more preferably 7 or more and 24 or less.

In the organic hydrophobic antimicrobial agent of formula (2), when R ⁵ is an aryl group, said group, a phenyl group, a phenyl group substituted with an alkyl group having 1 to 18 carbon atoms, a benzyl group, a carbon It is preferably a benzyl group substituted with an alkyl group having a number of 1 or more and 18 or less, and a phenoxyalkyl group having 7 or more and 24 or less carbon atoms.

In the organic hydrophobic antimicrobial agent of formula (2), when R ⁵ is alkyl alkyleneoxide group, the carbon number of the alkyl group in said group, there are more preferred, and with 24 or less is at least 6 It is preferable, and it is more preferable that it is 22 or less. Specifically, it is preferably 6 or more and 24 or less, and more preferably 6 or more and 22 or less. The number of carbon atoms of the alkylene group in the alkylalkylene oxide group is more preferably 2 or more, more preferably 6 or less, and further preferably 4 or less. Specifically, it is preferably 2 or more and 6 or less, and more preferably 2 or more and 4 or less.

In the organic hydrophobic antibacterial agent represented by the formula (2), the ^{number of carbon atoms in R 6} is preferably 1 or more, preferably 6 or less, and further preferably 4 or less. Specifically, it is preferably 1 or more and 6 or less, and more preferably 1 or more and 4 or less.

In the organic hydrophobic antimicrobial agent of formula (2), when R ⁶ is a cycloalkyl group, more preferably the substrate is a cyclopentyl group, a cyclohexyl group.

In the organic hydrophobic antibacterial agent represented by the formula (2), when X ⁺ is an alkali metal ion, examples thereof include lithium ion, sodium ion and potassium ion. When X ⁺ is an alkaline earth metal ion, examples thereof include magnesium ion, calcium ion and strontium ion. When X ⁺ is a cation of divalent or more and tetravalent or less, examples thereof include ethanolamine, diethanolamine, triethanolamine, N-substituted ethanolamine, N-substituted diethanolamine, trishydroxyaminomethane, guanidine, ethylenediamine, and hexamethylenediamine. , Hexamethylenetetramine and other amine proton salts (amines with H ⁺ added) can be mentioned.

Specific examples of the organic hydrophobic antibacterial agent represented by the formula (1) include benzalkonium cetyl phosphate. As benzalkonium cetyl phosphate, an antibacterial agent sold by Kao Corporation under the trade name Sanizol P can be used. On the other hand, specific examples of the organic hydrophobic antibacterial agent represented by the formula (2) are 1-hydroxy-4-methyl-6- (2,4,4-trimethylpentyl) -2 (1H) -pyridone monoethanol. Amine salt [1-Hydroxy-4-methyl-6- (2,4,4-trimethyl-pentyl) -2 (1H) -pyridone; combination with 2-aminoethanol (1: 1)] (CAS registration number 68890-66) -4, also known as piroctone olamine). This antibacterial agent is represented by the formula (2A) and is marketed by Clariant under the trade name Octopirox.

Examples of the organic hydrophobic antibacterial agent other than the above include 5-chloro-2- [2,4-dichlorophenoxy] phenol. This compound is also called triclosan.

For the purpose of adhering the organic hydrophobic antibacterial agent to the base sheet and / or the absorbent core, in the present invention, the organic hydrophobic antibacterial agent is dissolved in an organic solvent to form an antibacterial agent solution, and this antibacterial agent solution is prepared. It is preferable to adopt a step of incorporating the solvent into the base sheet and / or the absorbent core. The antibacterial agent solution is preferably a solution in which the organic hydrophobic antibacterial agent is completely dissolved. If an undissolved organic hydrophobic antibacterial agent is present in the antibacterial agent solution, inclusion of such an antibacterial agent solution in the substrate sheet and / or the absorbent core results in a heterogeneous organic hydrophobic antibacterial agent. May adhere to.

The organic solvent contained in the antibacterial agent solution is preferably a liquid at 25 ° C. As the organic solvent, a solvent capable of dissolving an organic hydrophobic antibacterial agent is used. In particular, it is advantageous to use an organic solvent having a solubility of the organic hydrophobic antibacterial agent preferably 5% by mass or more, more preferably 10% by mass or more, still more preferably 15% by mass or more. Here, the solubility of X mass% means that X g or more of the organic hydrophobic antibacterial agent is dissolved in 100 g of the organic solvent. When the solubility of the organic hydrophobic antibacterial agent changes depending on the temperature, it is preferable that the solubility at the temperature when the antibacterial agent solution is contained in the base sheet and / or the absorbent core is as described above.

From the viewpoint of sufficiently ensuring the solubility of the organic hydrophobic antibacterial agent, the solubility parameter of the organic solvent is preferably 12 or more, more preferably 13 or more, and further preferably 13.5 or more. , 14 or more is even more preferable. The solubility parameter is preferably 28 or less, more preferably 27 or less, further preferably 26 or less, and even more preferably 25 or less. Specifically, the solubility parameter is preferably 12 or more and 28 or less, more preferably 13 or more and 27 or less, further preferably 13.5 or more and 26 or less, and 14 or more and 25 or less. Even more preferable. The solubility parameter is calculated by the Feedors method [RFFedors, Polym. Eng. Sci., 14, 147 (1974)], and the unit is expressed in ^{(cal / cm 3} ) ^1/2. The solubility parameter is one of the indexes showing the affinity between the organic hydrophobic antibacterial agent and the organic solvent, and the closer this value is, the higher the compatibility between the two is.

The solubility parameter δ of the organic solvent is calculated by the following equation.
δ = (ΔE / V) ^1/2 (cal / cm ³ ) ^1/2
In the formula, ΔE represents the evaporation energy and V represents the molar volume.

When two or more kinds of organic solvents are used, it is preferable that the solubility parameter δ _{mix of the} mixture shown below is at least the above-mentioned value.
δ _mix = Σδ _i φ _i (cal / cm ³ ) ^1/2
In the equation, δ _i represents the solubility parameter of each organic solvent constituting the mixture, and φ represents the volume fraction of the component.

The organic solvent preferably has low volatility. If a highly volatile organic solvent is used, the organic solvent may volatilize in the manufacturing process of the absorbent article sheet and / or the absorbent core, so that it becomes necessary to attach an exhaust device to the manufacturing equipment. On the other hand, if an organic solvent having low volatility is used, it is not necessary to attach such a device. In addition, since a highly volatile organic solvent may catch fire or explode, it is necessary to attach an explosion-proof device to the manufacturing equipment, but if a low volatile organic solvent is used, it is not necessary to attach such a device. Is. As described above, by using the organic solvent having low volatility, the antibacterial agent solution is contained in the base sheet and / or the absorbent core, and then the organic solvent is contained in the absorbent article sheet and / or the absorbent article ( It can be left in the absorbent core).

From the above viewpoint, the organic solvent preferably has a vapor pressure of 30 Pa or less at 25 ° C. An organic solvent having a vapor pressure of 30 Pa or less at 25 ° C. is referred to as a "nonvolatile organic solvent" in the present invention. In particular, the vapor pressure of the organic solvent at 25 ° C. is more preferably 20 Pa or less, further preferably 15 Pa or less, and even more preferably 10 Pa or less.

From the viewpoint of ensuring safety in the manufacturing process of the absorbent article sheet and / or the absorbent core, the organic solvent preferably has a high flash point. By using an organic solvent having a high flash point, a sheet for an absorbent article and / or an absorbent core can be manufactured with simple equipment. Specifically, the flash point of the organic solvent is preferably 100 ° C. or higher, more preferably 105 ° C. or higher, further preferably 110 ° C. or higher, and even more preferably 115 ° C. or higher. .. The flash point is the temperature at which the flammable vapor reaches the concentration of the lower limit of explosion, and is measured according to the JIS K2265 Cleveland open flash point measurement test.

From the viewpoint of improving the handleability of the organic solvent in the manufacturing process of the absorbent article sheet and / or the absorbent core, the organic solvent preferably has a low molecular weight. When the organic solvent has a high molecular weight, its viscosity tends to increase and its handleability tends to decrease. Specifically, the molecular weight of the organic solvent is preferably less than 200, more preferably less than 150, further preferably less than 100, and even more preferably less than 91.

From the same viewpoint as the molecular weight, it is preferable that the organic solvent has an appropriate viscosity and good handleability. If the organic solvent has an excessively high viscosity, the handleability tends to decrease. On the contrary, if the viscosity is excessively low, it becomes difficult for the organic solvent to settle on the base sheet and / or the absorbent core, and it becomes difficult to uniformly apply the organic hydrophobic antibacterial agent to the base sheet and / or the absorbent core. .. From these viewpoints, the viscosity of the organic solvent at 25 ° C. is preferably 5 mPa · s or more, more preferably 10 mPa · s or more, further preferably 30 mPa · s or more, and 60 mPa · s or more. The above is even more preferable. The viscosity of the organic solvent at 25 ° C. is preferably 1500 mPa · s or less, more preferably 500 mPa · s or less, further preferably 300 mPa · s or less, and 90 mPa · s or less. Is even more preferable. Specifically, the viscosity of the organic solvent at 25 ° C. is preferably 5 mPa · s or more and 1500 mPa · s or less, more preferably 10 mPa · s or more and 500 mPa · s or less, and 30 mPa · s or more and 300 mPa · s. It is more preferably s or less, and even more preferably 60 mPa · s or more and 90 mPa · s or less. The viscosity of the organic solvent can be measured at 25 ° C. with a B-type or TVB-type viscometer manufactured by Toki Sangyo Co., Ltd. Here, the fact that the organic solvent is hydrophilic means that the solubility of the organic solvent in water at 25 ° C. is 10% by mass or more. The solubility of the organic solvent can be measured by the following method. An organic solvent is added to 100 g of pure water at 25 ° C., and the mixture is dissolved by stirring with a stirrer or a shaker. Solubility for.

Preferred compounds used as the organic solvent include those having hydrophilicity. Examples thereof include water-soluble organic solvents such as polyhydric alcohols such as dihydric alcohols (diols), trihydric alcohols (triols) and tetrahydric or higher alcohols. The number of carbon atoms of the alkyl group in these polyhydric alcohols is preferably 2 or more. The number of carbon atoms of the alkyl group is preferably 18 or less, more preferably 10 or less, and even more preferably 4 or less. Specifically, the number of carbon atoms of the alkyl group is preferably 2 or more and 18 or less, more preferably 2 or more and 10 or less, and further preferably 2 or more and 4 or less. In particular, the organic solvent preferably has the above-mentioned non-volatility in addition to having the above-mentioned hydrophilicity.

In particular, among polyhydric alcohols, it is preferable to use a lower dihydric alcohol having 2 or more and 4 or less carbon atoms. Specifically, it is preferable to use at least one hydrophilic organic solvent selected from the group consisting of ethylene glycol, propylene glycol, and butylene glycol. This is because these hydrophilic organic solvents are highly safe for the human body, do not generate a foul odor, do not require a removal step, and have a low risk of ignition or explosion. As the propylene glycol, 1,2-propylene glycol and 1,3-propylene glycol can be used. As the butylene glycol, 1,3-butylene glycol, 1,4-butylene glycol and 2,3-butylene glycol can be used.

The concentration of the organic hydrophobic antibacterial agent in the antibacterial agent solution is preferably 0.5% by mass or more, more preferably 1% by mass or more, further preferably 3% by mass or more, and 5% by mass. The above is even more preferable. The concentration of the organic hydrophobic antibacterial agent in the antibacterial agent solution is preferably 50% by mass or less, more preferably 35% by mass or less, further preferably 25% by mass or less, and 20% by mass. The following is even more preferable. Specifically, the concentration of the organic hydrophobic antibacterial agent in the antibacterial agent solution is preferably 0.5% by mass or more and 50% by mass or less, and more preferably 1% by mass or more and 35% by mass or less. It is more preferably 5% by mass or more and 25% by mass or less, and even more preferably 5% by mass or more and 20% by mass or less. By using the antibacterial agent solution in this concentration range, the organic hydrophobic antibacterial agent can be uniformly adhered to the base sheet and / or the absorbent core. As described above, it is permissible that the antibacterial agent solution contains water, but the water content is preferably 8% by mass or less.

The ratio of both when the antibacterial agent solution is applied to the base sheet and / or the absorbent core is based on the total area of the obtained absorbent article sheet and / or the absorbent core, and the organic hydrophobicity contained in the antibacterial agent solution. It is preferable that the basis weights of the sex antibacterial agent and the organic solvent are within the above-mentioned ranges. By mixing the antibacterial agent solution with the substrate sheet and / or the absorbent core in such a ratio, the organic hydrophobic antibacterial agent can be uniformly adhered to the substrate sheet and / or the absorbent core. Further, even if the organic solvent in the antibacterial agent solution is left as the sheet for the absorbent article and / or remains after mixing the two, the handleability of the obtained sheet for the absorbent article and / or the absorbent core, particularly The fluidity can be improved.

As a method of applying the antibacterial agent solution to the base sheet and / or the absorbent core, for example, when partially applied, a dropping method can be adopted. When it is applied to the entire surface, a spraying method can be adopted. In addition, various printing methods, a method of immersing in an antibacterial agent solution, and the like can also be adopted.

After applying the antibacterial agent solution to the base sheet and / or the absorbent core, the organic solvent may be removed by means such as heating or depressurization, if necessary. Of course, the organic solvent may remain without being removed. Not removing the organic solvent is advantageous from the viewpoint that the target member can be manufactured with simple equipment.

By the above procedure, the target sheet for absorbent articles and the absorbent core can be obtained. In the absorbent article sheet and the absorbent core thus obtained, even when the antibacterial agent solution is partially applied, when these members come into contact with a body fluid such as urine, the antibacterial agent is used. The agent solution diffuses in these members together with the body fluid, and a high antibacterial effect is exhibited in the entire area of these members. In particular, when the sheet for absorbent articles is used as the core wrap sheet for coating the absorbent core, when the core wrap sheet comes into contact with the body fluid, the antibacterial agent solution diffuses in the core wrap sheet together with the body fluid. Furthermore, since it diffuses into the absorbent core, a high antibacterial effect is exhibited over the entire area of the absorber. In contrast, even if the antibacterial agent is applied to these members in a powder state, the antibacterial agent is difficult to diffuse in the members together with the body fluid, so that the high antibacterial effect exhibited by the present invention can be obtained. No.

The absorbent article sheet and / or the absorbent article having the absorbent core of the present invention typically has a liquid permeable surface sheet that can come into contact with the wearer's skin when worn and is opaque or repellent. It includes a water-based back sheet and a liquid-retaining absorber interposed between the two sheets. As the front surface sheet, various non-woven fabrics or porous synthetic resin sheets or the like can be used, and as the back surface sheet, a synthetic resin film made of polyethylene, polypropylene, polyvinyl chloride or the like, or a composite of the synthetic resin film and the non-woven fabric. Materials and the like can be used. The absorbent article may further include various members according to the specific use of the absorbent article. Such members are known to those of skill in the art. For example, when an absorbent article is applied to a disposable diaper or a sanitary napkin, a pair or two or more pairs of three-dimensional guards can be arranged on the left and right sides of the surface sheet.

Regarding the above-described embodiment, the present invention further discloses the following sheets for absorbent articles, methods for producing sheets for absorbent articles, and methods for producing absorbent articles and absorbent articles.
<1>
A method for producing a sheet for an absorbent article, which comprises a step of incorporating an antibacterial agent solution containing an organic hydrophobic antibacterial agent, a hydrophilic and non-volatile organic solvent, and 8% by mass or less of water into the sheet.

<2>
A method for producing a sheet for an absorbent article, which comprises a step of adding an antibacterial agent solution containing an organic hydrophobic antibacterial agent, a hydrophilic and non-volatile organic solvent, and 30% by mass or less of water to the sheet and then drying the sheet. ..
<3>
The absorption according to <1> or <2>, wherein the organic hydrophobic antibacterial agent has a solubility in water at 25 ° C. of 40 g or less, preferably 10 g or less, and more preferably 1 g or less. A method for manufacturing a sheet for sex articles.
<4>
The method for producing a sheet for an absorbent article according to any one of <1> to <3>, wherein the organic solvent is hydrophilic, which means that the solubility in water at 25 ° C. is 10% by mass or more.
<5>
The non-volatile organic solvent means that the vapor pressure at 25 ° C. is 30 Pa or less, preferably 20 Pa or less, more preferably 15 Pa or less, and even more preferably 10 Pa or less. The method for producing a sheet for an absorbent article according to 1.
<6>
After the antibacterial agent solution is contained in the sheet,
The method for producing a sheet for an absorbent article according to any one of <1> to <5>, wherein the hydrophilic and non-volatile organic solvent is left on the sheet.

＜８＞
前記親水性かつ不揮発性の有機溶媒が、プロピレングリコール、エチレングリコール、及びブチレングリコールからなる群から選ばれる少なくとも１種の有機溶媒である前記＜１＞ないし＜７＞のいずれか１に記載の吸収性物品用シートの製造方法。
＜９＞
抗菌剤溶液を、滴下法によってシートに部分的に施すか、噴霧法によってシートの全面に施すか、各種の印刷法によってシートに施すか、又はシートを抗菌剤溶液に浸漬させる前記＜１＞ないし＜８＞のいずれか１に記載の吸収性物品用シートの製造方法。
＜１０＞
前記＜１＞ないし＜９＞のいずれか１に記載の吸収性物品用シートの製造方法で製造された吸収性物品用シート。
＜１１＞
有機疎水性抗菌剤と、親水性かつ不揮発性の有機溶媒と、１０質量％以下の水とを含む吸収性物品用シート。 <7>
The organic hydrophobic antibacterial agent is an organic compound represented by the following formula (1) or (2), or a sheet for an absorbent article according to any one of <1> to <6>, which is triclosan. Production method.

<8>
The absorption according to any one of <1> to <7>, wherein the hydrophilic and non-volatile organic solvent is at least one organic solvent selected from the group consisting of propylene glycol, ethylene glycol, and butylene glycol. A method for manufacturing a sheet for sex articles.
<9>
The antibacterial agent solution is partially applied to the sheet by the dropping method, applied to the entire surface of the sheet by the spraying method, applied to the sheet by various printing methods, or the sheet is immersed in the antibacterial agent solution. The method for producing a sheet for an absorbent article according to any one of <8>.
<10>
A sheet for an absorbent article manufactured by the method for producing a sheet for an absorbent article according to any one of <1> to <9>.
<11>
A sheet for an absorbent article containing an organic hydrophobic antibacterial agent, a hydrophilic and non-volatile organic solvent, and 10% by mass or less of water.

<12>
The sheet for an absorbent article according to <11>, wherein the antibacterial agent is hydrophobic, and the solubility in water at 25 ° C. is preferably 40 g or less, preferably 10 g or less, and more preferably 1 g or less.
<13>
The sheet for an absorbent article according to <11> or <12>, wherein the organic solvent is hydrophilic, and the solubility in water at 25 ° C. is 10% by mass or more.
<14>
The non-volatile organic solvent means that the vapor pressure at 25 ° C. is 30 Pa or less, preferably 20 Pa or less, more preferably 15 Pa or less, and even more preferably 10 Pa or less. The sheet for absorbent articles according to 1.
<15>
Containing 0.02 g / m ² or more of the organic hydrophobic antibacterial agent,
Preferably the abundance of the organic hydrophobic antimicrobial agent is 0.02 g / ^{m 2} or more, further preferably 0.04 g / ^{m 2} or more, more preferably at 0.05 g / ^{m 2} or more Further, it is preferably 0.5 g / m ² or less, more preferably 0.4 g / m ² or less, and further preferably 0.3 g / m ² or less. > The sheet for absorbent articles according to any one of.
<16>
The organic solvent is contained in a proportion of 4 times or more and 1000 times or less the mass of the organic hydrophobic antibacterial agent.
The ratio of the amount of the antibacterial agent used to the amount of the organic solvent used is preferably 4 times or more, more preferably 5 times or more, the mass of the organic solvent with respect to the mass of the antibacterial agent. , 8 times or more is more preferable. The sheet for absorbent articles according to any one of <10> to <15>, wherein it is preferably 1000 times or less, more preferably 100 times or less, and even more preferably 50 times or less. ..

＜１９＞
前記有機疎水性抗菌剤が、セチルリン酸ベンザルコニウム又はピロクトンオラミンである前記＜１０＞ないし＜１８＞のいずれか１に記載の吸収性物品用シート。
＜２０＞
前記有機溶媒として、前記有機疎水性抗菌剤を溶解し得るものが用いられ、特に、該有機疎水性抗菌剤の溶解度が好ましくは５質量％以上、更に好ましくは１０質量％以上、一層好ましくは１５質量％以上である該有機溶媒を用いる前記＜１０＞ないし＜１９＞のいずれか１に記載の吸収性物品用シート。
＜２１＞
前記有機溶媒はその溶解度パラメータが１２以上であることが好ましく、１３以上であることが更に好ましく、１３．５以上であることが一層好ましく、１４以上であることが更に一層好ましい。また溶解度パラメータは２８以下であることが好ましく、２７以下であることが更に好ましく、２６以下であることが一層好ましく、２５以下であることが更に一層好ましい前記＜１０＞ないし＜２０＞のいずれか１に記載の吸収性物品用シート。 <17>
The sheet for absorbent articles is composed of a base sheet, and the base sheet is preferably a fiber sheet or a perforated sheet in which a plurality of through holes are formed in a film, and the fiber sheet includes paper, non-woven fabric, and woven fabric. , A woven fabric, or a composite material thereof is preferable. The sheet for an absorbent article according to any one of <10> to <16>.
<18>
The sheet for an absorbent article according to any one of <10> to <17>, wherein the organic hydrophobic antibacterial agent is an organic compound represented by the following formula (1) or (2), or triclosan.

<19>
The sheet for an absorbent article according to any one of <10> to <18>, wherein the organic hydrophobic antibacterial agent is benzalkonium cetyl phosphate or piroctone olamine.
<20>
As the organic solvent, a solvent capable of dissolving the organic hydrophobic antibacterial agent is used, and in particular, the solubility of the organic hydrophobic antibacterial agent is preferably 5% by mass or more, more preferably 10% by mass or more, still more preferably 15. The sheet for an absorbent article according to any one of <10> to <19>, which uses the organic solvent having a mass% or more.
<21>
The solubility parameter of the organic solvent is preferably 12 or more, more preferably 13 or more, further preferably 13.5 or more, and even more preferably 14 or more. Further, the solubility parameter is preferably 28 or less, more preferably 27 or less, further preferably 26 or less, further preferably 25 or less, any one of the above <10> to <20>. The sheet for an absorbent article according to 1.

<22>
Multivalent alcohol is used as the organic solvent,
Of the polyhydric alcohols, it is preferable to use a lower dihydric alcohol having 2 or more and 4 or less carbon atoms.
Specifically, the absorbability according to any one of <10> to <21>, wherein it is preferable to use at least one hydrophilic organic solvent selected from the group consisting of ethylene glycol, propylene glycol, and butylene glycol. Goods sheet.
<23>
Propylene glycol is preferably at least one organic solvent selected from the group consisting of 1,2-propylene glycol and 1,3-propylene glycol.
The above-mentioned <22>, wherein the butylene glycol is preferably at least one organic solvent selected from the group consisting of 1,3-butylene glycol, 1,4-butylene glycol and 2,3-butylene glycol. Sheet for absorbent articles.
<24>
It has an absorbent core, a core wrap sheet arranged on the skin-facing surface side of the absorbent core, and a surface sheet arranged on the skin-facing surface side of the core wrap sheet.
An absorbent article using the absorbent article sheet according to any one of <10> to <23> as the core wrap sheet.
<25>
A method for producing an absorbent article, which comprises a step of incorporating an antibacterial agent solution obtained by dissolving an organic hydrophobic antibacterial agent in a hydrophilic and non-volatile organic solvent in an absorbent core.
<26>
The organic hydrophobic antibacterial agent is hydrophobic means that the absorbable article according to <25> has a solubility in water at 25 ° C. of 40 g or less, preferably 10 g or less, and more preferably 1 g or less. Method.

<27>
The method for producing an absorbent article according to <25> or <26>, wherein the organic solvent is hydrophilic, which means that the solubility in water at 25 ° C. is 10% by mass or more.
<28>
The non-volatile organic solvent means that the vapor pressure at 25 ° C. is 30 Pa or less, preferably 20 Pa or less, more preferably 15 Pa or less, and even more preferably 10 Pa or less. The method for producing an absorbent article according to 1.
<29>
The absorbent article according to any one of <25> to <28>, wherein the antibacterial agent solution contains water and the content of water is 8% by mass or less based on the mass of the antibacterial agent solution. Production method.
<30>
After the antibacterial agent solution is contained in the absorbent core,
The method for producing an absorbent article according to any one of <25> to <29>, wherein the hydrophilic and non-volatile organic solvent is left in the absorbent core.
<31>
The organic hydrophobic antibacterial agent is an organic compound represented by the following formula (1) or (2), or triclosan, which is preferable for producing an absorbent article according to any one of <25> to <30>. Method.

<32>
The absorption according to any one of <25> to <31>, wherein the hydrophilic and non-volatile organic solvent is at least one organic solvent selected from the group consisting of propylene glycol, ethylene glycol, and butylene glycol. Method of manufacturing sex goods.
<33>
The antimicrobial solution is applied partially to the absorbent core by the dropping method, over the entire surface of the absorbent core by the spraying method, applied to the absorbent core by various printing methods, or the absorbent core is applied to the absorbent core by the antibacterial agent solution. The method for producing an absorbent article according to any one of <25> to <32>.
<34>
An absorbent article produced by the method for producing an absorbent article according to any one of <25> to <33>.
<35>
An absorbent article comprising an absorbent core containing an organic hydrophobic antibacterial agent and a hydrophilic and non-volatile organic solvent.
<36>
The absorbability according to <34> or <35>, wherein the hydrophobic antibacterial agent has a solubility in water at 25 ° C. of 40 g or less, preferably 10 g or less, and more preferably 1 g or less. Goods.

<37>
The absorbent article according to any one of <34> to <36>, wherein the organic solvent is hydrophilic, and the solubility in water at 25 ° C. is 10% by mass or more.
<38>
The non-volatile organic solvent means that the vapor pressure at 25 ° C. is 30 Pa or less, preferably 20 Pa or less, more preferably 15 Pa or less, and even more preferably 10 Pa or less. The absorbent article according to 1.
<39>
The above-mentioned <34> to <38>, wherein the absorbent core contains water, and the content of water is preferably 10% by mass or less based on the mass of the absorbent core. Absorbent article.
<40>
Preferably the abundance of the organic hydrophobic antimicrobial agent in the absorbent core is 0.01 g / ^{m 2} or more, further preferably 0.05 g / ^{m 2} or more, at 0.1 g / ^{m 2} or more It is more preferably 10.0 g / m ² or less, further preferably 5.0 g / m ² or less, and even more preferably ^{2.0 g / m 2 or less.} 34> The absorbent article according to any one of <39>.
<41>
Preferably the abundance of the organic solvent in the absorbent core is 0.01 g / ^{m 2} or more, further preferably 0.02 g / ^{m 2} or more, it is 0.05 g / ^{m 2} or more It is more preferably 10 g / m ² or less, further preferably 5 g / m ² or less, further preferably 3 g / m ² or less, any of the above <34> to <40>. The absorbent article according to 1.

＜４５＞
前記有機疎水性抗菌剤が、セチルリン酸ベンザルコニウム又はピロクトンオラミンである前記＜３４＞ないし＜４４＞のいずれか１に記載の吸収性物品。
＜４６＞
前記有機溶媒として、前記有機疎水性抗菌剤を溶解し得るものが用いられ、特に、該有機疎水性抗菌剤の溶解度が好ましくは５質量％以上、更に好ましくは１０質量％以上、一層好ましくは１５質量％以上である該有機溶媒を用いる前記＜３４＞ないし＜４５＞のいずれか１に記載の吸収性物品。 <42>
The ratio of the amount of the organic hydrophobic antibacterial agent used to the amount of the organic solvent used is preferably 4 times or more, preferably 5 times or more, the mass of the organic solvent with respect to the mass of the organic hydrophobic antibacterial agent. It is more preferably 8 times or more, more preferably 1000 times or less, further preferably 100 times or less, still more preferably 50 times or less. > To <41>. The absorbent article according to any one of.
<43>
The absorbent core includes any of the above <34> to <42>, for example, a mixed product of flap pulp and a water-absorbent polymer, a deposit of only absorbent polymer, and a triple product of only fluff pulp. The absorbent article according to 1.
<44>
The absorbent article according to any one of <34> to <43>, wherein the organic hydrophobic antibacterial agent is an organic compound represented by the following formula (1) or (2), or triclosan.

<45>
The absorbent article according to any one of <34> to <44>, wherein the organic hydrophobic antibacterial agent is benzalkonium cetyl phosphate or piroctone olamine.
<46>
As the organic solvent, a solvent capable of dissolving the organic hydrophobic antibacterial agent is used, and in particular, the solubility of the organic hydrophobic antibacterial agent is preferably 5% by mass or more, more preferably 10% by mass or more, still more preferably 15. The absorbent article according to any one of <34> to <45>, which uses the organic solvent having a mass% or more.

<47>
The solubility parameter of the organic solvent is preferably 12 or more, more preferably 13 or more, further preferably 13.5 or more, and even more preferably 14 or more. Further, the solubility parameter is preferably 28 or less, more preferably 27 or less, further preferably 26 or less, further preferably 25 or less, any one of the above <34> to <46>. The absorbent article according to 1.
<48>
Multivalent alcohol is used as the organic solvent,
Of the polyhydric alcohols, it is preferable to use a lower dihydric alcohol having 2 or more and 4 or less carbon atoms.
Specifically, the absorbability according to any one of <34> to <47>, wherein it is preferable to use at least one hydrophilic organic solvent selected from the group consisting of ethylene glycol, propylene glycol, and butylene glycol. Goods.
<49>
Propylene glycol is preferably at least one organic solvent selected from the group consisting of 1,2-propylene glycol and 1,3-propylene glycol.
The above-mentioned <48>, wherein the butylene glycol is preferably at least one organic solvent selected from the group consisting of 1,3-butylene glycol, 1,4-butylene glycol and 2,3-butylene glycol. Absorbent article.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, the scope of the present invention is not limited to such examples. Unless otherwise specified, "%" and "parts" mean "mass%" and "parts by mass", respectively.

[Example 1]
1) Preparation of absorbent article sheet An antibacterial agent solution containing an organic hydrophobic antibacterial agent, an organic solvent, and 8% or less of water on a thin leaf paper having a ^{basis weight of 16 g / m 2 and a width of 200 mm and a length of 170 mm.} (Octopyrox: 1%, Propylene glycol: 99%) was added dropwise to two sites at 0.1 g per site using a dropper to contain the thin leaf paper. The positions for containing the antibacterial agent solution were two positions on the center line drawn parallel to the length direction and 30 mm away from the midpoint of the center line. The types of organic hydrophobic antibacterial agents and organic solvents, and the total amount added to tissue paper are as shown in Table 1. In Table 1, "PG" represents "1,2-propylene glycol". "BG" represents "1,3-butylene glycol". Further, "gsm" represents "g / m ² ".
2) Preparation of absorbent body The absorbent body was manufactured by coating the absorbent core with a sheet for an absorbent article. The absorbent core consists of a mixed laminated fiber with a fluff pulp basis weight of 180 g / m ² and a highly absorbent polymer basis weight of 160 g / m ² , measuring 190 mm long x 70 mm wide. The mass was 5.0 g.

[Example 2]
The positions of containing the antibacterial agent solution were set at four positions on the center line drawn parallel to the length direction and 20 mm and 60 mm away from the midpoint of the center line. The types of organic hydrophobic antibacterial agents and organic solvents, and the total amount added to tissue paper are as shown in Table 1. Other than these, the same as in Example 1.

[Example 3]
1) Preparation of sheet for absorbent articles A thin paper (width 200 mm × length 170 mm) similar to the thin paper used in Example 1 was used.
2) Preparation of Absorber An absorbent core made of a mixed product fiber having a basis weight of fluff pulp of 180 g / m ² and a basis weight of a highly absorbent polymer of 160 g / m ^{2 was prepared.} The size of the absorbent core was 190 mm in length × 70 mm in width, and the mass was 5.0 g. An organic hydrophobic antibacterial agent, an organic solvent, and an antibacterial agent solution containing 10% or less of water were added dropwise to the absorbent core. The position where the antibacterial agent solution was contained was set at one position on the center line drawn parallel to the length direction on the skin-facing surface of the absorbent core and on the midpoint of the center line. The types of organic hydrophobic antibacterial agents and organic solvents, and the total amount added to the absorbent core are as shown in Table 1. The absorbent core was coated with the absorbent article sheet prepared in 1) to produce an absorbent body.

[Example 4]
The position where the antibacterial agent solution was contained was set at one position on the center line drawn parallel to the length direction on the skin-facing surface of the absorbent core and on the midpoint of the center line. The types of organic hydrophobic antibacterial agents and organic solvents, and the total amount added to tissue paper are as shown in Table 1. Other than these, the same as in Example 1.

[Example 5]
Table 1 shows the types of organic hydrophobic antibacterial agents and organic solvents, and the total amount added to tissue paper. Other than these, the same as in Example 4.

[Example 6]
An antibacterial agent solution (Octopirox: 10%, propylene) containing an organic hydrophobic antibacterial agent, an organic solvent, and 30% or less of water on a thin leaf paper having a basis weight of 16 g / m ^{2 and a width of 200 mm and a length of 170 mm.} Glycol: 70%, ion-exchanged water 20%) was dropped into two places using a dropper at 0.1 g, absorbed by thin leaf paper, and then placed in a blower dryer set at 105 ° C. and dried for 30 minutes. went. The positions for containing the antibacterial agent solution were two positions on the center line drawn parallel to the length direction and 30 mm away from the midpoint of the center line. The types of organic hydrophobic antibacterial agents and organic solvents, and the total amount added to tissue paper are as shown in Table 1.
2) Preparation of absorbent body The absorbent body was manufactured by coating the absorbent core with a sheet for an absorbent article. The absorbent core consists of a mixed laminated fiber with a fluff pulp basis weight of 180 g / m ² and a highly absorbent polymer basis weight of 160 g / m ² , measuring 190 mm long x 70 mm wide. The mass was 5.0 g.

[Example 7]
Table 1 shows the types of organic hydrophobic antibacterial agents and organic solvents, and the total amount added to tissue paper. Other than these, the same as in Example 1.

[Example 8]
1) Preparation of sheet for absorbent articles A thin paper (width 200 mm × length 170 mm) similar to the thin paper used in Example 1 was used.
2) Preparation of Absorber An absorbent core made of a mixed product fiber having a basis weight of fluff pulp of 180 g / m ² and a basis weight of a highly absorbent polymer of 160 g / m ^{2 was prepared.} The size of the absorbent core was 190 mm in length × 70 mm in width, and the mass was 5.0 g. The absorbent core contained an organic hydrophobic antibacterial agent, an organic solvent, and an antibacterial agent solution containing 10% or less of water. The position where the antibacterial agent solution was contained was set at one position on the center line drawn parallel to the length direction on the skin-facing surface of the absorbent core and on the midpoint of the center line. The types of organic hydrophobic antibacterial agents and organic solvents, and the total amount added to the absorbent core are as shown in Table 1. The absorbent core was coated with the absorbent article sheet prepared in 1) to produce an absorbent body.

[Example 9]
1) Preparation of sheet for absorbent articles A thin paper (width 200 mm × length 170 mm) similar to the thin paper used in Example 1 was used.
2) Preparation of Absorber An absorbent core made of a mixed product fiber having a basis weight of fluff pulp of 180 g / m ² and a basis weight of a highly absorbent polymer of 160 g / m ^{2 was prepared.} The size of the absorbent core was 190 mm in length × 70 mm in width, and the mass was 5.0 g. The absorbent core contained an organic hydrophobic antibacterial agent, an organic solvent, and an antibacterial agent solution containing 10% or less of water. The positions for containing the antibacterial agent solution were four positions on the center line drawn parallel to the length direction on the skin-facing surface of the absorbent core and 20 mm and 60 mm away from the midpoint of the center line. .. The types of organic hydrophobic antibacterial agents and organic solvents, and the total amount added to the absorbent core are as shown in Table 1. The absorbent core was coated with the absorbent article sheet prepared in 1) to produce an absorbent body.

[Comparative Example 1]
This comparative example is an example in which, in Example 1, a thin paper sheet not containing an antibacterial agent solution was used as a sheet for an absorbent article. Other than this, the same as in Example 1.

[Comparative Example 2]
1) Preparation of Absorbent Article Sheet After spraying an organic hydrophobic antibacterial agent on thin paper having a width of 200 mm and a length of 170 mm, the antibacterial agent was fixed by spraying with spray glue. The position where the organic hydrophobic antibacterial agent was sprayed was set at one position on the center line drawn parallel to the length direction and on the midpoint of the center line. The types of organic hydrophobic antibacterial agents and the amount added to thin paper are as shown in Table 1.
2) Preparation of absorbent body The absorbent body was manufactured by coating the absorbent core with a sheet for an absorbent article. The absorbent core consists of a mixed laminated fiber with a fluff pulp basis weight of 180 g / m ² and a highly absorbent polymer basis weight of 160 g / m ² , measuring 190 mm long x 70 mm wide. The mass was 5.0 g.

[Comparative Example 3]
1) Preparation of sheet for absorbent articles A thin paper (width 200 mm × length 170 mm) similar to the thin paper used in Example 1 was used.
2) Preparation of Absorber An absorbent core made of a mixed product fiber having a basis weight of fluff pulp of 180 g / m ² and a basis weight of a highly absorbent polymer of 160 g / m ^{2 was prepared.} The size of the absorbent core was 190 mm in length × 70 mm in width, and the mass was 5.0 g. An organic hydrophobic antibacterial agent was sprayed on the absorbent core, and then spray glue was sprayed to immobilize the antibacterial agent. The position where the organic hydrophobic antibacterial agent was sprayed was set at one position on the center line drawn parallel to the length direction and on the midpoint of the center line. The types of organic hydrophobic antibacterial agents and the amount added to the absorbent core are as shown in Table 1. The absorbent core was coated with the absorbent article sheet prepared in 1) to produce an absorbent body.

[Comparative Example 4]
An organic hydrophobic antibacterial agent was sprayed on thin paper having a width of 200 mm and a length of 170 mm, and then spray glue was sprayed to immobilize the antibacterial agent. The positions where the organic hydrophobic antibacterial agent was sprayed were set at four positions on the center line drawn parallel to the length direction and 20 mm and 60 mm away from the midpoint of the center line. The types of organic hydrophobic antibacterial agents and the amount added to thin paper are as shown in Table 1. Other than this, it was the same as in Comparative Example 2.

[Comparative Example 5]
The types of organic hydrophobic antibacterial agents and the amount added to tissue paper are as shown in Table 1. Other than this, it was the same as in Comparative Example 2.

〔evaluation〕
For the absorbers obtained in Examples and Comparative Examples, sensory evaluation of suppression of urine odor was performed according to the following procedure. The results are shown in Table 1.

[Sensory evaluation of suppression of urine odor]
<A> Urine to be used for evaluation was prepared by the following procedures (a) to (d).
(A) A non-woven fabric having a basis weight of 20 g / m ² (without special treatment such as antibacterial and deodorant, size: 10 cm × 15 cm) was prepared.
(B) Four monitors (adult male, 12 hours after bathing) using the non-woven fabric of (a) moderately moistened with water, each wiped their lower body well, and the indigenous bacteria on the skin Intestinal bacteria derived from stool were collected.
(C) Four monitors collected urine, and 2.0 g of urine was attached to the non-woven fabric of (b), placed in a plastic bag, sealed, and allowed to stand in an atmosphere of 36 ° C. for 24 hours. As a result, the bacteria in the non-woven fabric of (b) were grown.
(D) Then, 500 g of urine collected by each of the monitors was mixed, and 2000 g of the urine was placed in an Erlenmeyer flask with a stopper. Four non-woven fabrics on which (c) bacteria were grown were placed therein and immersed for 20 minutes with occasional stirring.
<B> Next, 50 g of urine obtained as a result of (d) was gradually injected into the central portion of the absorbers obtained in Examples and Comparative Examples so as not to overflow. Each absorber infused with urine was placed in a container made of stainless steel deep assembly bat No. 3 (manufactured by AS ONE) with a lid and sealed. Each container was stored in a constant temperature dryer, kept warm at 36 ° C., and allowed to stand for 6 hours.
After 6 hours, each container was taken out from the constant temperature dryer, and 5 monitors (adult men and women) other than the above monitors were allowed to perform sensory evaluation according to the following criteria. As a specific method of sensory evaluation, the container was first taken out from a constant temperature dryer, the lid was opened, and then the container was allowed to stand for 30 seconds. Then, the nose was brought close to the container to smell the odor, and when Comparative Example 1 was set to 5, the evaluation was performed according to the following criteria. The average value and the median value of the numerical values were calculated and used as the result of the sensory evaluation of each absorber.
5: Strong putrid odor.
4: Weak putrid odor.
3: Strong odor that can be easily understood with urine.
2: A weak odor that can be recognized as urine.
1: A slight odor that is difficult to distinguish from urine.
0: There is no smell.

表中、「＋」は抗菌剤溶液を添加したことを意味し、「−」は何も添加していないことを意味する。

In the table, "+" means that the antibacterial agent solution was added, and "-" means that nothing was added.

As is clear from the results shown in Table 1, it can be seen that the absorbers obtained in each example sufficiently exhibited the antibacterial effect of the antibacterial agent, and as a result, the effect of suppressing urine odor was higher than that of the absorbers of the comparative examples. ..

Claims (4)

An absorbent article comprising an absorbent core, a core wrap sheet arranged on the skin-facing surface side of the absorbent core, and a surface sheet arranged on the skin-facing surface side of the core wrap sheet.
The core wrap sheet is a fiber sheet containing an organic hydrophobic antibacterial agent, a hydrophilic and non-volatile organic solvent, and water.
The organic solvent has a vapor pressure of 30 Pa or less at 25 ° C., a molecular weight of less than 100, and a solubility of the organic hydrophobic antibacterial agent of 5% by mass or more .
The amount of water is 8% by mass or more and 10% by mass or less with respect to the mass of the core wrap sheet.
An absorbent article in which the organic hydrophobic antibacterial agent is represented by the following formula (2A).

The absorbent article according to claim 1, wherein the core wrap sheet ^{contains 0.02 g / m 2 or more of the organic hydrophobic antibacterial agent.} The absorbent article according to claim 1 or 2, wherein the organic solvent is contained in a proportion of 4 times or more and 1000 times or less the mass of the organic hydrophobic antibacterial agent. The absorbent article according to any one of claims 1 to 3, wherein the hydrophilic and non-volatile organic solvent is at least one organic solvent selected from the group consisting of propylene glycol, ethylene glycol, and butylene glycol. ..