JP2002200112A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article having high skin protectivity against excretion and an irritant substance occurring therefrom without obstructing the absorbing capacity of a diaper. SOLUTION: In the absorbent article having an absorbing layer 4 and a rear surface layer 3, a medicine for forming a protective film on the skin, a medicine for reinforcing the skin or a medicine for reducing the friction of the skin and the absorbent article is held on the predetermined region of the absorbent article in an amount or state sufficiently developing skin protectivity against excretion and the absorbing capacity of the absorbent article.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article having high skin protection against excrement and irritants derived therefrom.

[0002]

2. Description of the Related Art As an absorbent article intended to prevent rash on the skin of a wearer,
For example, Japanese Patent Publication No. 10-509895 and Japanese Patent Publication No.
The thing described in -509896 gazette is known. These publications, lotions containing emollients are described disposable diaper, which is painted on the top sheet. This lotion contains an immobilizing agent that immobilizes the emollient to the topsheet.

In the disposable diaper described in the above publication, in order to immobilize the emollient agent on the top sheet, the emollient agent is melted together with the immobilizing agent and then applied to the top sheet. Since the immobilizing agent is a hydrocarbon-based compound, it is water-repellent but lipophilic, has a high affinity for lipophilic substances in stool, and the lipophilic substance easily remains on the top sheet. . In addition, the lipophilic substance easily comes into contact with the wearer's skin, which causes rash.

Further, since the immobilizing agent is water repellent, urine and the like hardly permeate through the top sheet, which may cause the absorption performance of the diaper to be impaired.

Accordingly, an object of the present invention is to provide an absorbent article having high skin protection against excrement and stimulants derived therefrom without impairing the absorption performance of the diaper.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to an absorbent article having a liquid-retentive absorbing layer and a liquid-impermeable backing layer, comprising a liquid-retaining absorbing layer and a liquid-impermeable backing layer. In an absorbent article, at a predetermined site of the absorbent article, a drug for forming a protective film on the skin, a drug for strengthening the skin, or a drug for reducing friction between the skin and the absorbent article is used to protect the skin against excrement. The object has been achieved by providing an absorbent article which is held in an amount or under a condition such that the properties and the absorbing performance of the absorbent article are sufficiently exhibited.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the absorbent article according to the present invention will be described below with reference to the drawings, taking a disposable diaper as an example of the absorbent article.

As shown in FIG. 1, the disposable diaper 1 of this embodiment has a surface material 2 as a liquid-permeable surface layer and a back surface as a liquid-impermeable back layer made of a thermoplastic resin sheet or the like. It has a material 3 and an absorber 4 as a liquid-retaining absorbing layer interposed between the front surface material 2 and the back surface material 3. The absorber 4 is formed in a curved hourglass shape in a region corresponding to the crotch region of the diaper 1, and the front surface member 2 and the back surface member 3 also correspond to the crotch region of the diaper 1 according to the shape of the absorber 4. The region is curved. The absorber 4 is sandwiched and fixed between the front surface member 2 and the back surface member 3.

Back and abdominal waist portions 5 and 5 ′ formed by a front surface member 2 and a back surface member 3 extending outward from front, rear, left and right end portions of the absorber 4, and a pair of leg portions 6. 6, an elastic elastic member 7 for fitting the waist portions 5, 5 'and the leg portions 6, 6 to the wearer's body when the diaper 1 is worn includes the front surface material 2 and the back surface material 3.
Is fixedly provided. A pair of fasteners 8 such as tape fasteners are attached to both ends in the width direction of the back waist portion 5, and a rectangular landing is formed on the back material 3 at the waist portion 5 'on the abdomen side. An adherend (not shown) made of tape or the like is attached. Then, when the disposable diaper 1 of the present embodiment is worn, the fastening device 8 is fixed on the adherend. These members constituting the diaper 1 include:
The same thing as the thing used for the conventional disposable diaper is used.

The absorber 4 has particles of a superabsorbent polymer and a nonwoven fabric. The superabsorbent polymer particles are held in the inter-fiber spaces of the nonwoven. The entire surface of the nonwoven fabric holding the particles of the superabsorbent polymer is covered with the tissue paper 11. Thus, the absorber 4 is configured. The absorber 4 having such a configuration is extremely thin as compared with a conventional absorber mainly composed of pulp and particles of a superabsorbent polymer. The fibers constituting the nonwoven fabric include rayon fibers, cotton, hydrophilic fibers such as cellulose acetate, polyolefin fibers such as polyethylene and polypropylene, condensed fibers such as polyester and polyamide, and vinyl monomer polymers such as vinyl chloride and vinyl acetate. And the like. Of these fibers, hydrophobic ones may be used after being rendered hydrophilic by treatment with an oil agent or the like.

In the diaper 1 of the present embodiment, the surface material 2 has a two-layer structure, and is composed of an uppermost layer, that is, a surface layer facing the skin, and a lower layer adjacent to the surface layer. The surface layer and the lower layer are integrated. Both the surface layer and the lower layer are liquid-permeable. Further, at least the lower layer is hydrophilic. From the viewpoint of sufficiently increasing the liquid permeability of the surface material 2, the surface layer is also preferably hydrophilic.

Examples of the surface material 2 having a two-layer structure in which at least the lower layer is hydrophilic are shown in FIGS.
Examples shown in (f) are given. (1) As shown in FIG. 2 (a), a web 2a made of a fiber subjected to a hydrophilization treatment is a fiber that has been subjected to a hydrophilization treatment or has not been subjected to the hydrophilization treatment, and constitutes the web. An air-through nonwoven fabric 2c obtained by laminating webs 2b made of the same or different fibers from the fibers to form a laminated web, and then treating the laminated web with hot air. (2) As shown in FIG. 2 (b), a spun bond, a spun bond or the like is formed on a hydrophilic base sheet 2d made of a sheet such as paper or hydrophilic non-woven fabric by an adhesive 2e such as a hot melt adhesive. Hydrophobic sheet 2 such as bond-meltblown-spunbond (SMS), spunbond-meltblown-meltblown-spunbond (SMMS)
2g of a sheet obtained by joining and integrating f. (3) As shown in FIG. 2 (c), the hydrophobic sheet 2f
An adhesive 2e such as a hot-melt pressure-sensitive adhesive is applied thereon, and a hydrophilic fiber such as pulp fiber or rayon fiber is sprayed thereon to form a hydrophilic layer 2h made of these fibers. Sheet 2i. In this sheet, the hydrophilic fibers are exposed from the eyes of the hydrophobic sheet 2f, and the liquid is drawn. In actual use, the hydrophobic sheet 2f
Use with the skin side. (4) As shown in FIG. 2 (d), a sheet 2j obtained by laminating the hydrophobic sheet 2f on the hydrophilic base sheet 2d and embossing the two to integrate them. (5) As shown in FIG. 2 (e), a sheet 2k obtained by laminating the hydrophobic sheet 2f on the hydrophilic base sheet 2d and subjecting both to a hole opening process. (6) As shown in FIG. 2 (f), a hydrophobic substance 2m such as a hot-melt adhesive or polyethylene is sprayed on the hydrophilic base sheet 2d in various patterns such as stripes to form the hydrophobic substance. Sheet 2n formed with the above layer.

The above-mentioned hydrophilic treatment is carried out by applying a surfactant such as a nonionic surfactant (eg, polyoxyalkylene alkyl ether).

In the diaper 1 of the present embodiment, a predetermined medicine is held on the surface material 2. Specifically, the drug is held only on the entire surface layer of the surface material 2. The lower layer does not hold the drug. When the drug is held in such a state, the protection of the skin against excretion due to the action of the drug is sufficiently exhibited, and the absorption of the liquid caused by holding the drug is inhibited. Is prevented, and the absorption performance of the diaper 1 is sufficiently exhibited. Such a holding state is also a state in which the medicine can migrate from the surface material 2 and adhere to the skin of the wearer. The holding state of the medicine as in the present embodiment is particularly effective when a water-repellent and oil-repellent medicine described later is used as the medicine. In the present invention, the expression of sufficient absorption performance means, as is clear from the examples described later, mainly that liquid permeation of the surface material is not hindered and liquid flow on the surface material does not occur. .

As the above-mentioned drug, (1) a drug for forming a protective film on the skin, (2) a drug for strengthening the skin or (3)
An agent that reduces friction between the skin and the absorbent article is used. These drugs migrate from the diaper 1 to the wearer's skin when the diaper 1 is worn, and exhibit a predetermined effect. These drugs may be used in combination of two or more. Hereinafter, each of these drugs will be described.

The above-mentioned agent which forms a protective film on the skin (hereinafter referred to as "the agent")
The protective film-forming agent) migrates to the skin of the wearer, forms a protective film on the surface of the skin, and physically protects the skin.
Examples of the protective film forming agent include fluorine compounds such as fluorine oils and fluorine polymers, silicone oil, silicone rubber, olefin wax, liquid paraffin, fatty acid esters such as squalane, squalene, petrolatum, isopropyl myristyl, cetanol, stearyl alcohol, etc. Aliphatic alcohols, glycerin fatty acid esters such as 2-ethylhexanoic acid triglyceride, and vegetable oils (such as olive oil). In particular, it is preferable to use a fluorine-based compound which is a water-repellent and oil-repellent agent from the viewpoint that excrement, particularly stool and lipophilic stimulants derived therefrom, can be effectively prevented from adhering to the skin.

When a fluorine compound is used as the protective film forming agent, the compound may have a perfluoroalkyl group having 4 to 22 carbon atoms, particularly a perfluoroalkyl group having 4 to 12 carbon atoms. It is preferable from the viewpoints of maintaining the blending stability of the protective film forming agent, preventing a decrease in workability due to an increase in the viscosity of the protective film forming agent, and suppressing production costs of the protective film forming agent. Further, since the protective film forming agent is generally often held in a polyolefin-based material, the fluorine-based compound may have an alkyl group in addition to the above-described perfluoroalkyl group. It is preferable from the viewpoint of improvement in retention. In particular, it is preferable to use an alkyl group having 4 to 22 carbon atoms, especially 6 to 18 carbon atoms, because the above-mentioned retention is further improved.

When a fluorine-based compound is used as the protective film forming agent, it has a low molecular weight (for example, a molecular weight of 100 to 100).
0) and compounds having a molecular weight in the range from oligomers to high molecular weight polymers (for example, having a molecular weight of 10,000 to 100).
0000) can be used.

Examples of the low molecular weight fluorine compounds include fluorine oils. Examples of the fluorinated oil agent include a fluorinated ester oil agent and a fluorinated ether oil agent.

Examples of the fluorine-based compound comprising a high molecular weight polymer, acrylic acid perfluoroalkyl ester, polymer and polymerized with a monomer having a perfluoroalkyl group, such as methacrylic acid perfluoroalkyl esters, these And copolymers obtained by using these monomers and monomers having no perfluoroalkyl group, and the like. Can be

As the monomer having a perfluoroalkyl group, those represented by the following formula (1) are preferably used. On the other hand, as the monomer having no perfluoroalkyl group, a monomer represented by the following formula (2) is preferably used. In the formulas (1) and (2), R ₁ is H or C
H ₃ , especially CH _3, is preferred. In the formula (1), R ₂ is C ₂ -C
₄ alkylene groups are preferred and Rf ₁ is C ₄ -C ₂₂ , especially C ₄
Perfluoroalkyl group ₄ -C ₁₂ are preferred. In the formula (2), R ₃ is preferably a C ₁₂ -C ₂₂ alkyl group.
By adjusting the number of carbon atoms of R ₃ , the retention of the fluorine compound with respect to the polyolefin material can be improved.

[0022]

Embedded image

Among the various fluorine compounds, it is preferable to use a low molecular weight fluorine compound, especially a fluorine oil, from the viewpoints of stability of blending, handleability and uniform coating property. When using a fluorine-based compound composed of a high-molecular polymer, the thin film coating is difficult due to an increase in viscosity, for example, in order to avoid uneven coating and dripping of the coating liquid, the viscosity during coating is reduced. Is preferably set to 10,000 mPa · s or less.

The agent for strengthening the skin (hereinafter referred to as a skin strengthening agent) transfers to the skin of the wearer and strengthens the skin against excretions and irritants derived therefrom. Examples of the skin enhancer include natural ceramides, synthetic ceramides, ceramides such as pseudoceramides, plant extracts, astringents, stratum corneum softeners (arginine, guanidine derivatives, for example, 2-
Organic acid salts of (2-hydroxyethoxy) ethylguanidine (as organic acid salts, such as succinic acid, glycolic acid, lactic acid, malic acid, citric acid, tartaric acid)], humectants [squalane, squalene, natural moisturizing ingredients (NMF )]. In particular, it is preferable to use ceramides, plant extracts, and natural moisturizing components from the viewpoint of high barrier reinforcing effect and cost.

It is preferable to use pseudo-ceramide as the ceramide. This is because (1) natural ceramides are difficult to extract and are unstable, and (2) synthetic ceramides are expensive. Pseudo ceramides include water retention ceramides and barrier ceramides. Water-retaining ceramides include squingolipid E and aqua ceramide obtained using type 2 ceramide as a lead compound, and barrier ceramides include those obtained using o-acyl ceramide (type 1 ceramide) as a lead compound.

On the other hand, as plant extracts, oat extract, seaweed extract (Hibamata), yuzu extract, hamamelis extract, waremokou extract, asunaro extract, aloe extract, licorice, oubak extract, horsetail extract, chamomile extract, eucalyptus extract, peach Extract and the like.
In particular, as plant extracts, citron extract, hamamelis extract, asunaro extract, aloe extract, oak extract,
By using one or more substances of the peach extract and the eucalyptus extract, the effect of strengthening the skin is further enhanced. Further, decomposition of the superabsorbent polymer is also suppressed. Among them, it is preferable to use hamamelis extract, asunaro extract or eucalyptus extract from the viewpoint of further improving the effect of strengthening the skin and further suppressing the decomposition of the superabsorbent polymer. The plant extract is preferably a 1,3-butylene glycol extract from the viewpoint that explosion-proof measures are not required when heat treatment is performed in the manufacturing process of the absorbent article. Also,
By using the 1,3-butylene glycol extract,
Since 1,3-butylene glycol coexists in the diaper 1, deterioration in absorption performance is reduced.

The above agent for reducing friction between the skin and the absorbent article (hereinafter referred to as a friction reducing agent) reduces the friction between the wearer's skin and the absorbent article while wearing the absorbent article such as a diaper. It is to reduce. As the friction reducing agent, plate-like crystals made of an organic substance, metal salts of acylated taurine, for example, lauroyl-β-alanine calcium,
Lauroyl taurine calcium metal salt, distearyl ether, zinc sodium cetyl phosphate, Nε-lauroyl-L-lysine (product name; Amihope LL, Ajinomoto),
Silicone beads, organic particles (for example, nylon beads, chitosan beads, ultrahigh molecular weight polyethylene) and the like can be mentioned. In particular, it is preferable to use a plate-like crystal made of an organic substance from the viewpoint that excellent touch and smoothness can be imparted. When the friction reducing agent is a powder, the particle size is preferably 0.05 to 50 μm, particularly preferably 1 to 20 μm.

Each of the above-mentioned chemicals is held in at least the main absorption region of the liquid in the surface material 2. The “main absorption region of the liquid” is a region extending from the crotch portion in the front-rear direction, and has a meaning other than a peripheral portion of the surface material 2. Of course,
The medicine may be held over the entire surface of the surface material 2. In addition, any part of the inner surface of the diaper, such as a nonwoven fabric for forming a three-dimensional guard, a leg part, a waist part, and the like, which may be disposed as necessary, may be applied to any part. Furthermore, as in the embodiment described later, the stripes may be applied.

In the main absorption region of the surface material 2, the drug is contained in an amount of 0.001 g / m ^{2 to} 20 g / m ² , particularly 0.0 g / m ^2.
That it is coated in an amount of ^{2g / m 2 ~10g / m 2} ,
This is preferable from the viewpoint that the absorption performance of the diaper 1 is not hindered, a sufficient effect is exhibited within a range economically feasible, and the sense of touch.

The agent is applied by means of, for example, mixing the agent uniformly with water and applying the obtained aqueous solution or aqueous dispersion to the surface material 2. The concentration of the drug in the aqueous solution or dispersion is 0.1 to 50% by weight, especially 3 to 20% by weight.
By weight percent, uniformity of finish and easiness of processing (excessive concentration, spraying in the form of a mist does not result in fog, adhesion to manufacturing equipment, dropping, etc.) Preferred from the point.

[0031] In the diaper 1 of this embodiment, the site where the drug is applied, for the purpose of smooth or dry skin, Shikkaroru, talc, also contain organic or inorganic fine particles such as titanium oxide good. The particle size of the fine particles is preferably from 0.05 to 50 μm, particularly preferably from 1 to 20 μm, from the viewpoint of sufficiently achieving the object.

The present invention is not limited to the above embodiment.
For example, in the above-described embodiment, the drug is held only on the entire surface layer of the two-layer surface material. Alternatively, the drug may be held only on the surface of the surface layer and its vicinity. It is also possible to use a single-layer surface material,
In that case, the same effect can be exhibited by holding the drug only on the surface of the surface material and in the vicinity thereof.

In addition, the absorbent 4 may contain pulp generally used in conventional diapers. in this case,
For 100 parts by weight of pulp, the amount of superabsorbent polymer is 5
It is preferably from 300 to 300 parts by weight.

The absorbent article of the present invention is not limited to the above-mentioned disposable diaper, but can be similarly applied to other absorbent articles such as sanitary napkins, incontinence pads, panty liners, vaginal sheets.

[0035]

EXAMPLES In the following examples, "%" and "parts" mean "% by weight" and "parts by weight", respectively, unless otherwise specified.

Example 1 10 parts of perfluorohexylmethyl-1,3 dimethylbutyl ether (fluorinated ether oil) as a protective film forming agent, polyoxyethylene lauryl ether (ethylene oxide addition mole number: 6) 2
0 parts and 100 parts of water were mixed to obtain a uniform mixed solution.

A core-sheath type composite fiber (3.3 dtex, fiber length 51) in which the core is polypropylene and the sheath is polyethylene
mm) was immersed in the mixture, and the mixture was allowed to adhere to the composite fiber. The composite fiber was dried in the conjugate fiber to the protective film forming agent by adhering and said composite fibers hydrophilic treatment agent (70 wt% of sodium polyoxyethylene lauryl ether sulfate and mono-lauroyl phosphate Fe - Tokariumu salt 30 wt% (A mixture of the above). The composite fiber thus obtained was set on a carding machine, and the basis weight was 10
g / m ² of the first web was obtained.

Separately, 20 parts of polyoxyethylene lauryl ether (the number of moles of ethylene oxide added: 6) and 100 parts of water were mixed to form a uniform aqueous solution. A conjugate fiber similar to the conjugate fiber was immersed in this aqueous solution, and the aqueous solution was attached to the conjugate fiber. By drying the composite fiber, the composite fiber was hydrophilized with polyoxyethylene lauryl ether. The hydrophilized conjugate fiber was set on a carding machine to obtain a second web having a basis weight of 15 g / m ² .

The first web is superimposed on the second web and treated with hot air at a temperature of 140 ° C., so that the surface layer derived from the first web and the lower layer derived from the second web are integrated. An air-through nonwoven fabric having a basis weight of 25 g / m ² was obtained.
In this nonwoven fabric, the protective film forming agent was attached to the entire surface layer derived from the first web at an attachment amount of 0.15 g / m ² . The thus obtained nonwoven fabric was used as a surface material of a diaper.

100 parts of NBKP and 100 parts of superabsorbent polymer particles (crosslinked polyacrylic acid) were uniformly mixed. The mixture was wrapped in tissue paper having a basis weight of 20 g / m ² to give a total basis weight of 300 g / m ² , which was used as an absorbent for a diaper.

The above surface material was provided on one surface of the absorber, and a polyethylene film was provided on the other surface as a back material.
Furthermore, the known fastening device, by disposing the resilient and elastic members such as to obtain a disposable diaper embodiment shown in Figure 1.

Example 2 In place of the protective film-forming agent used in Example 1, a fluorine-based polymer as a protective film-forming agent (polymerized using perfluorooctylethyl methacrylate as a monomer) Polymer, number average molecular weight 180
00) was used. The adhesion of the fluorine-based polymer to the fiber is performed by uniformly mixing and emulsifying 3 parts by weight of the fluorine-based polymer, 10 parts by weight of the surfactant, and 100 parts by weight of water with a homogenizer, and spraying the mixture onto the first web described in Example 1. Coated and dried (each component was mixed immediately before coating to ensure uniform stability of the emulsion). The viscosity at that time was set to 10 mPa · s. Except for this, a disposable diaper was obtained in the same manner as in Example 1.

Example 3 A disposable diaper was obtained in the same manner as in Example 1 except that a mixture obtained by adding 1 part of Hamamelis extract to the mixture prepared in Example 1 was used.

Example 4 A disposable diaper was obtained in the same manner as in Example 1 except that a mixture obtained by adding 1 part of asnalo extract to the mixture prepared in Example 1 was used.

Example 5 The mixed solution used in Example 3 was
Only on the surface of the air-through nonwoven fabric manufactured in advance and in the vicinity thereof, a width of 10 mm along the longitudinal direction of the nonwoven fabric,
Coating was performed in a stripe shape (five lines) at a pitch of 10 mm. The coating method is a gravure coating method, with an adhesion amount of 0.2 after drying.
It was adjusted to 0 g / m ² . Except for this, a disposable diaper was obtained in the same manner as in Example 1.

[Comparative Example 1] Core-sheath type composite fiber (3.3 dte) in which the core is polypropylene and the sheath is polyethylene
x, fiber length 51 mm) to form a web subjected to carding machine, to obtain a air-through nonwoven fabric having a basis weight of 25 g / m ² and processes the web with hot air. On one side of this non-woven fabric, 100 parts of polyolefin wax and myristyl isopropylate 2
0 part with a width of 10 along the longitudinal direction of the nonwoven fabric.
mm and a pitch of 10 mm in a stripe shape (five). The basis weight of the mixture in the coated part was 5 g / m ² . The nonwoven fabric thus obtained was used as a surface material with the surface coated with the mixture facing upward. Except for this, a disposable diaper was obtained in the same manner as in Example 1.

Comparative Example 2 A web was prepared in which the basis weight of the first web used in Example 1 was changed to 20 g / m ² .
Using this web, an air-through nonwoven fabric was obtained under the same conditions as in Example 1. The nonwoven fabric thus obtained was used as a surface material. Except for this, a disposable diaper was obtained in the same manner as in Example 1. This surface material held a protective film forming agent composed of a fluorine-based compound over the entire area in the thickness direction.

[Evaluation of Performance] The disposable diapers obtained in the examples and comparative examples were evaluated for their ability to prevent artificial feces from adhering, to prevent diaper rash and to prevent liquid flow on the surface material by the following methods. Table 1 shows the results.

[Prevention of Adhesion of Artificial Stool] An artificial stool (oily pigment 1%, oleic acid 1%,
1 g of petrolatum (9%, polyethylene glycol 89%) was applied. The diapers obtained in the examples and comparative examples were wound around the forearm to which artificial stool was attached such that the surface material faced the skin. After a lapse of 3 hours, the diaper was removed, the portion where the artificial stool was adhered was wiped off with a commercially available wiping wipe, and the degree of unwiping was evaluated based on the following three to one criteria.

[0050] Even if gently wiped, it can be wiped clean with no residue left.・ ・ 3 points ・ Wipe lightly and there is a little residue.・ ・ ・ ・ ・ ・ ・ ・ 2 points ・ If you wipe lightly, you may be worried about unwiped residue.・ ・ ・ ・ ・ ・ ・ ・ 1 point

Of the 15 persons, 60% or more of the monitors rated 3 points were rated as ○, and less than 60% were rated 40% or more as Δ,
A value less than the division was evaluated as x. The higher the score, the higher the anti-adhesion property.

[Diaper rash prevention] The diapers were used by 15 monitors for two weeks, and the degree of diaper rash during that time was evaluated according to the following criteria. The degree of dissolution of the superabsorbent polymer after using the diaper was visually evaluated according to the following criteria.

[0053] ◎ ·· rash monitors that have experienced did not have.・: One or two monitors experienced a rash. △: 3 or more and 5 or less monitors experienced rash. ×: More than half of the monitors experienced rash.

[Liquid Flow Prevention Property] A disposable diaper was fixed on a plate inclined at 45 degrees so that its surface material faced upward. 50 g of physiological saline was flowed 200 mm inward from the upper end of the diaper, and the distance at which the physiological saline flowed down on the surface material was measured. The same measurement was repeated three times, and the distance was measured each time. The shorter this distance,
It means that the liquid flow prevention property is high. The evaluation was performed according to the following criteria.

··········································································· Although repeated measurements are performed, the liquid flow distance does not increase. ○ ・ ・ When the first liquid flow distance is more than 60mm to 100mm,
Is not long liquid flow distance be and repeated measurements. △ but ... first of liquid flow distance is 100mm or less, gradually liquid flow distance increases by the measurement of the repetition. However, the liquid flow distance does not exceed 200 mm, and liquid does not leak from the end of the diaper. × ・ ・ In the first or repeated measurement, the liquid flow distance is 200
mm, the liquid leaks out from the end of the diaper.

[0056]

[Table 1]

As is clear from the results shown in Table 1, the disposable diaper of the present invention (the product of the present invention) prevents the adhesion of artificial stool containing an oily substance by the action of a protective film forming agent comprising a fluorine-based compound. It turns out that it is excellent in property. Comparative Example 1
In the diaper, since the polyolefin wax held on the surface material is lipophilic, it is found that artificial stool is left unwiped, which causes diaper rash.

In the diaper of Comparative Example 2 in which the protective film forming agent made of a fluorine-based compound is held over the entire thickness direction of the surface material, a liquid flow occurs due to the fluorine-based compound, It can be seen that the absorption performance of the A was impaired. On the other hand, in the diaper of the example in which the fluorine-based compound is held under a specific state, the liquid flow is prevented, and it can be seen that the diaper's absorption performance is sufficiently exhibited.

[0059]

According to the absorbent article of the present invention, the protection of the skin against excretions and irritants derived therefrom is enhanced while preventing the flow of excreted liquid.

[Brief description of the drawings]

FIG. 1 is a partially broken plan view of a disposable diaper as one embodiment of an absorbent article according to the present invention as viewed from a surface material side.

FIGS. 2 (a) to 2 (f) are schematic diagrams each showing a surface material 2 having a two-layer structure in which at least a lower layer is hydrophilic.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disposable diaper (absorbent article) 2 Surface material 3 Back material 4 Absorber

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) A61F 13/472 A61F 13/18 B A61L 15/00 F term (Reference) 3B029 BB02 BD22 4C003 AA23 4C081 AA12 BA17 BB01 BC02 CA132 CE02 DA05 4C098 AA09 CC02 CC07 CC08 DD10 DD14 DD25 DD26 DD28 DD30

Claims (6)

[Claims] 1. An absorbent article having a liquid-retentive absorbent layer and a liquid-impermeable back layer, wherein a drug for forming a protective film on the skin, a drug for strengthening the skin, An absorbent article in which an agent for reducing friction between the skin and the absorbent article is maintained in an amount or under a condition such that the protective property of the skin against excrement and the absorption performance of the absorbent article are sufficiently exhibited. . 2. The absorbent article according to claim 1, further comprising a liquid-permeable surface layer sandwiching the absorbing layer together with the back surface layer, wherein the surface layer holds the drug. 3. The absorbent article according to claim 2, wherein the drug is held only on the surface of the surface layer and in the vicinity thereof. 4. The surface layer has at least a two-layer structure, wherein the drug is held only on the surface of the uppermost layer and in the vicinity thereof or only on the entirety of the uppermost layer, and is adjacent to the uppermost layer. The absorbent article according to claim 3, wherein the lower layer is hydrophilic. Wherein said agent for forming a protective film on the skin, the absorbent article according to claim 1 comprising a fluorine compound having a perfluoroalkyl group having 4 to 22 carbon atoms. 6. The absorbent article according to claim 5, wherein said fluorinated compound comprises a fluorinated ether oil or a fluorinated ester oil.