JP5746855B2 - Absorbent articles - Google Patents

Description

  The present invention relates to absorbent articles such as disposable diapers and sanitary napkins.

Various absorbent articles coated with a skin care agent have been proposed. For example, in Patent Document 1, an effective amount of a lotion coating that is semisolid or solid at 20 ° C. and can be partially transferred to the wearer's skin is applied to at least a portion of the outer surface of the topsheet. Have been described. The lotion coating contains a polysiloxane emollient and an immobilizing agent capable of immobilizing the emollient. As the fixing agent, for example, C ₁₄ -C ₂₂ fatty alcohol is used.

  The present inventors have also proposed an absorbent article to which a skin care agent is applied (see Patent Document 2). In this absorbent article, a water-soluble skin care agent is present on the surface sheet, and an oily skin care agent comprising a specific diamide derivative is present on the water-soluble skin care agent and closer to the skin than the water-soluble skin care agent. ing. In this absorbent article, in the initial stage of wearing the article, the oily skin care agent is transferred to the wearer's skin by contact with the wearer's skin, thereby reducing the friction between the article and the skin. Prevents the skin from being damaged. After wearing the article, the water-soluble skin care agent that was under the oily skin care agent moves to the skin of the wearer upon excretion, and the skin care effect is expressed, so the skin caused by contact with urine and stool The rash is suppressed.

Japanese National Patent Publication No. 10-509895 JP 2004-255164 A

  In each of the above-mentioned absorbent articles, since the oily substance is contained in the skin care agent applied to the surface sheet, the surface sheet becomes sticky due to the oily substance depending on the amount of the skin care agent applied. Sometimes. In order to reduce the sticky feeling, the amount of the skin care agent applied may be reduced, but in that case, a sufficient skin care effect is not exhibited.

  Therefore, the subject of this invention is providing the absorbent article which can eliminate the fault which the prior art mentioned above has.

The present invention provides an absorbent article obtained by applying a skin care composition containing an emollient and its immobilizing agent to a member that comes into contact with the wearer's skin when worn.
Using a diamide derivative represented by the following formula (I) as the emollient,
An aliphatic monoalcohol having 14 to 22 carbon atoms is used as the immobilizing agent,
In the measurement of fragment ions using TOF-SIMS for the member, the ratio I _D / I of the fragment ion intensity I _D derived from the diamide derivative to the total intensity I _T of all fragment ions detected _An absorbent article having a _T of 0.1 × 10 ^{−2 to} 0.3 × 10 ⁻² is provided.

  The absorbent article of the present invention can exhibit a skin care effect without causing a sticky feeling.

FIG. 1 is a schematic diagram showing the presence state of the skin care composition in the absorbent article of the present invention. FIG. 2 is a schematic diagram showing the presence state of a skin care composition in a conventional absorbent article. FIGS. 3A and 3B are image images obtained by TOF-SIMS showing the presence state of the skin care compositions in Examples and Comparative Examples.

  Hereinafter, the present invention will be described based on preferred embodiments thereof. The absorbent article of this invention has the surface sheet which is located in the side near a wearer's skin, and opposes a wearer's skin, and the back surface sheet located in the side far from a wearer's skin. A liquid-retaining absorber is disposed between both sheets. If necessary, a pair of leak-proof cuffs may be disposed on the left and right sides of the top sheet.

  As the top sheet and the back sheet, the same sheets as those usually used in the technical field can be used. For example, as the surface sheet, for example, a hydrophilic nonwoven fabric or a perforated film having liquid permeability can be used. These nonwoven fabrics and films are generally composed of a thermoplastic resin. As the back sheet, for example, a liquid-impermeable film or a liquid-impermeable nonwoven fabric can be used. The liquid-impermeable film may have moisture permeability.

  As the absorbent body, it is possible to use a laminated product of flap pulp or a mixed product of fluff pulp and superabsorbent polymer. The absorbent body may have the same thickness over the entire area of the article, or a part thereof, for example, a part facing the excretion part of the wearer may be thicker than the other part. The same applies to the basis weight of the absorbent body, which may have the same basis weight over the entire area of the article, or a part, for example, the part facing the excretion part of the wearer has a higher basis weight than the other part. It may be.

  In the absorbent article, a skin care composition is applied to a member that contacts the wearer's skin when worn. The skin care composition is used for the purpose of suppressing skin troubles such as a rash on the wearer's skin while wearing the absorbent article. For this purpose, the skin care composition is preferably applied to a surface sheet or a leak-proof cuff which is a member that comes into contact with the wearer's skin when worn.

  For example, when the skin care composition is applied to the top sheet, the skin care composition can be applied evenly over the entire surface sheet. Alternatively, the skin care composition can be applied discontinuously such that an area of presence and absence of the skin care composition is formed. In the latter case, for example, the presence area and non-existence area of the skin care composition extend in the longitudinal direction of the absorbent article with a predetermined width, and both areas are alternately arranged along the width direction of the absorbent article. These can be formed.

  The skin care composition contains an emollient and its immobilizing agent. Emollients improve skin health by, for example, softening or softening the skin, lubricating the skin, applying moisture to the skin, moisturizing the skin, and purifying the skin. In general, substances having In the present invention, the diamide derivative represented by the above formula (I) is used as an emollient because the skin care effect is particularly high.

  The diamide derivative represented by the formula (I) mainly suppresses the excrement from directly touching the wearer's skin by transferring to the wearer's skin when the absorbent article starts to be worn. This suppresses the penetration of excrement into the skin and suppresses the occurrence of rash. It also reduces friction between the skin and absorbent articles, reduces skin irritation and skin damage caused by absorbent articles, and softens the skin after percutaneous absorption, or enhances the barrier function of the skin. It also has a function.

  The emollient fixing agent comprising the diamide derivative represented by the formula (I) is a member that comes into contact with the skin of the wearer in the absorbent article, for example, an emollient applied to a surface sheet or a leak-proof cuff. It is used for the purpose of fixing to. For this purpose, the fixing agent is preferably an oily substance. Examples of such substances include aliphatic monoalcohols having 14 to 22 carbon atoms, aliphatic monocarboxylic acids having 12 to 22 carbon atoms, and esters of the carboxylic acids with aliphatic monoalcohols having 14 to 22 carbon atoms. Are known. As a result of the study by the present inventors, among these substances, when an aliphatic monoalcohol having 14 to 22 carbon atoms is used as a fixing agent, stickiness caused by the diamide derivative represented by the formula (I) is generated. It has been found that it can be effectively reduced. It was also found that the immobilization effect of the diamide derivative represented by the formula (I) is particularly high.

  Examples of the aliphatic monoalcohol having 14 to 22 carbon atoms used as a fixing agent include unsaturated aliphatic monoalcohols such as lauryl alcohol, myristyl alcohol, cetyl alcohol and stearyl alcohol, and unsaturateds such as oleyl alcohol and linolyl alcohol. An aliphatic monoalcohol can be used. These alcohols can be used alone or in combination of two or more. Among saturated aliphatic monoalcohols and unsaturated aliphatic monoalcohols, the use of saturated aliphatic monoalcohols can effectively reduce the occurrence of stickiness caused by the diamide derivative represented by formula (I). preferable. When cetyl alcohol and stearyl alcohol are used as the saturated aliphatic monoalcohol, the occurrence of stickiness caused by the diamide derivative represented by the formula (I) can be more effectively reduced. In particular, it is advantageous to use stearyl alcohol.

  As a result of the study by the present inventors, the stickiness of the skin care composition containing the fixing agent and the diamide derivative represented by the formula (I) indicates that the skin care on the surface of the base to which the skin care composition is applied. It has been found that it depends on the presence of the composition. Specifically, as schematically shown in FIG. 1, when the skin care composition S is discontinuously and discretely present on the surface of the base material M, stickiness may not easily occur. found. In addition, the base material M consists of a fiber and a film, for example. On the other hand, as schematically shown in FIG. 2, it was found that when the skin care composition S is continuously present on the surface of the base material M in a film shape, it is easy to perceive stickiness. . Therefore, in order not to give a sticky feeling to the absorbent article to which the skin care composition is applied, the skin care composition may be applied so as to be in the state shown in FIG. As described in detail in Examples below, when the skin care composition is present in the state shown in FIG. 1, the individual skin care compositions are discretely distributed with a size of about 1 to 15 μm (described later). (See FIG. 3 (a)).

  When the present inventors diligently investigated about the means which can observe correctly the presence state of the skin care composition in the surface of the base material M, it turned out that it is effective to use TOF-SIMS. TOF-SIMS is Time-of-Flight Secondary Ion Mass Spectrometry. TOF-SIMS is an apparatus for examining what components (atoms and molecules) exist on the outermost surface of a solid sample. According to TOF-SIMS, trace components on the order of ppm can be detected. The substance to be detected is both organic and inorganic. In addition, according to TOF-SIMS, the distribution of components present on the surface of a solid sample can be examined.

When a skin care composition is applied to a member in contact with the wearer's skin in an absorbent article, and the surface of the member is measured for fragment ions using TOF-SIMS, all the fragment ions detected from the surface of the member the ratio I _D / I _T of the fragment ion intensities I _D to the to the total value I _T of the intensity from the diamide derivative, it was found that closely related to the existing state of the skin care composition on the surface of the member . If the details, I _D / I _T is ^{0.1 × 10 -2 ~0.3 × 10 -2} , preferably from ^{0.1 × 10 -2 ~0.2 × 10 -2} , the skin care composition The state of the presence of is almost as shown in FIG. 1, and it is difficult to produce a sticky feeling due to the skin care composition. On the other hand, when I _D / I _T is more than 0.3 × 10 ⁻² , the presence state of the skin care composition is almost as shown in FIG. 2, and the sticky feeling caused by the skin care composition is felt. It becomes easier to perceive. If I _D / I _T is less than 0.1 × 10 ^-2, while the stickiness becomes difficult to occur, too small amount of the compound represented by formula (I), a sufficient skin care benefits It will stop expressing.

Information obtained by TOF-SIMS is a site having a depth of several nanometers from the surface to be measured. Therefore, the more uniformly the diamide derivative represented by the formula (I) is present on the surface of the member, the higher the fragment ion intensity I _D derived from the diamide derivative detected by TOF-SIMS. By utilizing this, by comparing the values obtained by normalizing the fragment ions intensity I _D derived from diamide derivative represented by the formula (I) in total ionic strength I _T, the skin care composition is applied The presence state of the diamide derivative represented by the formula (I) in the member can be qualitatively evaluated.

  The measurement by TOF-SIMS is performed in a vacuum. The diamide derivative represented by the formula (I) does not volatilize in vacuum, but the aliphatic monoalcohol having 14 to 22 carbon atoms, which is a fixing agent, volatilizes in vacuum. Intensity measurement cannot be performed. Therefore, in the present invention, the aliphatic monoalcohol is chemically modified to enable measurement by TOF-SIMS. Specifically, the aliphatic monoalcohol 1 and dimethylaminophenyl isocyanate 2 are reacted by the reaction represented by the following formula (1) to obtain a chemically modified compound 3. About this compound 3, the intensity | strength measurement of the fragment ion by TOF-SIMS is performed. The chemical modification of the aliphatic monoalcohol can be performed after the skin care composition is applied to the member that contacts the wearer's skin. A specific modification method and the subsequent TOF-SIMS measurement method are described in detail in, for example, Japanese Patent No. 4527603.

For the ratio I _D / I _T of the fragment ion intensities I _D obtained by the measurement by TOF-SIMS it is to be in the range described above, diamide derivative with carbon atoms represented by the formula (I) 14 to 22 It has been found advantageous to adjust the ratio of use with aliphatic monoalcohols. Specifically, it is preferable to increase the amount of the aliphatic monoalcohol used relative to the diamide derivative. In particular, with respect to the total weight of the said diamide derivative and the aliphatic monoalcohol, 60-90 wt% of the aliphatic monoalcohol, preferably by the 70 to 85 mass%, the I _D / I _T above This makes it easy to set the range, and as a result, it is possible to successfully balance the suppression of stickiness and the expression of the skin care effect.

  In order to obtain a skin care composition by mixing a diamide derivative represented by the formula (I) and an aliphatic monoalcohol having 14 to 22 carbon atoms, for example, a state in which these are heated to 60 to 100 ° C. to form a liquid Mix it below. In order to apply the skin care composition thus obtained to a surface sheet or a leak-proof cuff that is a member that contacts the wearer's skin in the absorbent article, the skin care composition is heated to, for example, 60 to 80 ° C. Then, it may be attached to the surface of the member by a method such as coating, spraying or dipping in a liquid state. Specifically, for example, a die coater method, a slot spray method, a curtain spray method, a melt blown method, a spiral spray method, a gravure method, a bead method and the like can be used.

  Instead of directly applying the skin care composition to the member of the absorbent article that comes into contact with the skin of the wearer, a means for applying it indirectly can also be adopted. For example, after the skin care composition is directly applied to the top sheet of the absorbent article by the various methods described above, a leak-proof cuff that is not coated with the skin care composition is brought into contact with the top sheet. By this contact, a part of the skin care composition applied to the top sheet is transferred to the leak-proof cuff, and the skin care composition is indirectly applied to the leak-proof cuff. In addition, you may make it accelerate | stimulate the transfer of a skin care composition by performing pressurization under a contact state. In the transition of the skin care composition, if the state of presence of the skin care composition in the top sheet that is the transition source is the state shown in FIG. 1, the state of presence of the skin care composition in the leakage prevention cuff that is the transition destination is also illustrated in FIG. It becomes a state.

Using the ratio of the diamide derivative and an aliphatic monoalcohol in as skin care compositions described above the presence state of the skin care composition, i.e. it affects the intensity ratio I _D / I _T of the fragment ions. In contrast, as a result of the study by the present inventors, surprisingly, the amount of the skin care composition applied to the member in contact with the skin of the wearer in the absorbent article is large in the presence state of the skin care composition. It was found to have no effect. In particular, in the range of usage skincare effect is sufficiently exhibited, somewhat irrespective of usage, the intensity ratio I _D / I _T of the fragment ions were found not to change significantly. The amount of skin care composition sufficient skincare effects are expressed in the present invention are preferably expressed at a basis weight 0.3 to 2 g / m ^2, more preferably from 0.5 to 1 g / m ^2.

  When the skin care composition is applied to the topsheet as a member that contacts the wearer's skin in the absorbent article, it is preferable to perform a hydrophilic treatment on the topsheet prior to that. For example, when the surface sheet is made of various nonwoven fabrics, a hydrophilic treatment is performed by attaching a hydrophilic agent to the surface of the constituent fibers of the nonwoven fabric or kneading the hydrophilic agent into the constituent fibers. be able to. Thereafter, the skin care composition may be applied to the surface of the fiber by the various methods described above.

  The surface sheet is required to have a property of allowing the excreted liquid to smoothly pass through the absorber. If the surface sheet is water repellent, the liquid cannot be smoothly permeated. For this purpose, it is preferable to subject the surface sheet to a hydrophilic treatment as described above. Applying the hydrophilic treatment leads to a reduction in the contact angle of the top sheet with the ion exchange water. When the present inventors examined this contact angle, it was found that the value of the contact angle is different between the state shown in FIG. 1 and the state shown in FIG. Specifically, it was found that the state shown in FIG. 1 has a smaller contact angle value than the state shown in FIG. 2, and the topsheet is highly hydrophilic. From this, it can be seen that the presence state of the skin care composition applied to the top sheet can also be evaluated by the contact angle between the member applied with the skin care composition and ion-exchanged water. When the present inventors examined this evaluation method, the contact angle between the surface sheet to which the skin care composition was applied and the ion-exchanged water was preferably 60 ° to 90 °, more preferably 60 ° to 75 °. In some cases, it was found that the skin care composition was present on the topsheet generally in the state shown in FIG. The range of the contact angle is also a range in which the top sheet can smoothly transmit the liquid.

  A specific method for measuring the contact angle is as follows. For the measurement of the contact angle, for example, a contact angle meter MCA-J manufactured by Kyowa Interface Science Co., Ltd. is used. Specifically, a hydrophilizing agent is applied to the surface sheet to which the skin care composition has been applied. After ion-exchanged water is dropped (about 20 picoliters) on the surface sheet after application of the hydrophilizing agent, the contact angle is measured immediately using the contact angle meter. The measurement is performed at five or more locations on the surface sheet after applying the hydrophilizing agent, and the average value thereof is taken as the contact angle. The measurement temperature is 22 ° C.

  In general, when a skin care composition is applied to a top sheet, the contact angle of the applied site exceeds 90 degrees, and it is difficult for liquid to permeate through the site. Therefore, conventionally, the skin care composition is applied to the surface sheet in a multi-stripe pattern so that there are non-application sites, and liquid permeation is secured through the non-application sites. On the other hand, in the present invention, even if the skin care composition is applied to the entire surface sheet, the liquid permeation through the application site is ensured. This is because the skin care composition exists in the state shown in FIG. The ability to apply the skin care composition to the entire surface sheet is extremely advantageous from the viewpoint of sufficient skin care effects.

As a nonwoven fabric which comprises the said surface sheet, what contains the fiber comprised, for example from various thermoplastic resins can be used. As the thermoplastic resin, polyolefin resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate, and the like can be used. The fiber may be a single fiber of these resins or a blend fiber or a composite fiber containing two or more resins. The thickness of the fiber is generally in the range of 0.5 to 8.9 dtex, in particular approximately 1 to 5.6 dtex. In addition to these fibers, natural fibers and semi-natural fibers can also be blended into the nonwoven fabric. The basis weight of the nonwoven fabric is preferably 10 to 60 g / m ² , particularly preferably 15 to 30 g / m ² .

The diamide derivative used in the present invention is represented by the above-described formula (I). In the formula (I), R ¹ is an alkyl group having 1 to 18 carbon atoms; Or a di-hydroxyalkyl group; an alkyl group having 1 to 18 carbon atoms substituted with an alkoxy group having 1 to 6 carbon atoms; and an alkyl group having 1 to 18 carbon atoms substituted with a hydroxy group and an alkoxy group having 1 to 6 carbon atoms An alkyl group is preferred. In particular, an alkyl group having 1 to 18 carbon atoms; a mono- or dihydroxyalkyl group having 2 to 12 carbon atoms; an alkyl group having 2 to 12 carbon atoms substituted with an alkoxy group having 1 to 6 carbon atoms; a hydroxy group and carbon It is preferable that it is a C2-C12 alkyl group substituted by the C1-C6 alkoxy group. R ² is particularly preferably a linear or branched alkylene group having 1 to 12 carbon atoms, particularly a linear or branched alkylene group having 2 to 6 carbon atoms. R ³ represents a straight or branched divalent hydrocarbon group having 2 to 34 carbon atoms, particularly a straight chain or branched alkylene group having 2 to 34 carbon atoms; and carbon having 1 to 4 double bonds It is preferably an alkenylene group having 2 to 34 carbon atoms, particularly a linear or branched alkylene group having 2 to 24 carbon atoms; and an alkenylene group having 2 to 24 carbon atoms having 1 to 4 double bonds. It is preferable. The diamide derivatives represented by the formula (I) can be used alone or in combination of two or more.

  The diamide derivative represented by the formula (I) should be used so that the viscosity at 36 ° C. is 5000 mPa · s or less, particularly 200 to 5000 mPa · s, particularly 500 to 2000 mPa · s. It is preferable to use one having a viscosity adjusted according to the good transferability of the diamide derivative to the skin. The viscosity can be measured, for example, as follows.

  Measurement is performed using a tuning fork type vibration viscometer (in the present invention, typically, VIBRO NISCOMETERCJV5000 (manufactured by A & D Co., Ltd.) is used). The diamide derivative heated to about 100 ° C. in advance is slowly cooled to room temperature, and the viscosity at 36 ° C. is measured.

  In addition to the diamide derivative represented by the formula (I), other emollients can be added to the skin care composition. Examples of such other emollients include liquid paraffin, silicone oil, animal and vegetable oils (olive oil, jojoba oil, safflower oil, squalane and squalene, etc.), monoglyceride, diglyceride, triglyceride, aliphatic ether (myristyl-1,3- Dimethylbutyl ether, palmityl-1,3-dimethylbutyl ether, stearyl-1,3-dimethylbutyl ether, palmityl-1,3-methylpropyl ether, stearyl-1,3-methylpropyl ether, etc.), isostearyl-cholesterol ester, paraffin A wax etc. are mentioned.

  Furthermore, you may mix | blend ceramides, pseudoceramide, glycosphingolipid, sphingophospholipid, etc. with the skin care composition used by this invention as needed. Ceramides include natural ceramides extracted and purified from brain and skin, and synthetic ceramides synthesized by microbiological or chemical methods. Pseudoceramide can be produced according to the methods described in, for example, JP-A-62-228048 and JP-A-63-216852. Preferable examples of pseudoceramide include a compound represented by the following formula (2).

  Glycosphingolipids and glycosphingolipids are naturally derived and synthetic, as with the ceramides described above. Examples of the sphingoglycolipid include those in which the constituent sugar is composed of glucose, mannose, galactose, glucuronic acid, glucosamine, and the like, and cerebroside and sulfate thereof. Examples of sphingophospholipids include sphingomyelin.

  Specific examples of the absorbent article of the present invention include disposable diapers, sanitary napkins, incontinence pads, panty liners, and vaginal sheets, but are not limited to these, for absorbing and holding excreta excreted from the human body. Widely encompasses the articles used.

  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, “part” means “part by mass”.

[Example 1]
(1) Preparation of skin care composition A diamide derivative represented by the following formula (II) was used as an emollient in the skin care composition. The viscosity of this diamide derivative at 36 ° C. was 1800 mPa · s. Stearyl alcohol was used as a fixing agent for the diamide derivative. The diamide derivative and stearyl alcohol were heated to 80 ° C. to melt and mixed uniformly. The amount used was 8 parts stearyl alcohol per 2 parts diamide derivative. In this way, a skin care composition was obtained.

(2) Manufacture of model absorbent articles

As a model absorbent article, a disposable diaper face sheet was prepared by applying the skin care composition obtained in (1) above. As the surface sheet, an air-through nonwoven fabric having a basis weight of 30 g / m ² made of a core-sheath type composite fiber having a fineness of 3.3 dtex and having a core component of polypropylene and a sheath component of polyethylene was used. The raw fiber of this nonwoven fabric was previously subjected to a hydrophilic treatment with a hydrophilizing agent. The skin care composition obtained in the above (1) was applied to the entire surface of the nonwoven fabric using a spray coater. The spray coater was applied by heating and melting the skin care composition at 80 ° C. The coating amount of the skin care composition was 50 μg / cm ² (0.5 g / m ² ).

(3) Chemical modification of stearyl alcohol Stearyl alcohol in the skin care composition was chemically modified according to the method described in Japanese Patent No. 4527603. That is, the nonwoven fabric to which the skin care composition was applied was cut to about 1 × 1 cm. This was placed in a 900 ml sealed container. 30 mg of 4- (dimethylamino) phenyl isocyanate was used as a modifying reagent. Further, 5.0 μl of 1,8-diazabicyclo [5,4,0] undecene (DBU) was used as a catalyst. These were put in the previous sealed container. The non-woven fabric was allowed to stand in this sealed container at 25 ° C./24 hours to perform a gas phase reaction, and stearyl alcohol was chemically modified.

(4) Measurement by TOF-SIMS TOF-SIMS IV manufactured by ION-TOF was used as a measuring device. The measurement conditions were as follows.
Primary ion source:
Bi ₃ ²⁺ 25keV, current 0.3pA (DC conversion)
Pulse width 100nsec., Measured in high spatial resolution mode Secondary ion uptake conditions:
Positive ion scan Time Resolution 100psec, Cycle time 100μsec
Measurement area: 150 × 150 μm, number of pixels: 128 × 128 pixel, number of scans: 100 times An electron gun was used during measurement to reduce charging.
In the measurement of the fragment ion intensity, the diamide derivative was detected at the peak of the fragment ion having a mass number of 513, and stearyl alcohol was detected at the peak of the fragment ion having a mass number of 433 as a modified product.

(5) shows the measurement results of the ion intensity ratio I _D / I _T by the evaluation TOF-SIMS in Table 1 below. Moreover, the image image of the presence state of the skin care composition in the nonwoven fabric surface obtained by TOF-SIMS is shown to Fig.3 (a). Moreover, the value of the contact angle measured by the method described above is shown in the same table. Furthermore, the result of the sensory evaluation of the sticky feeling performed by the following method is also shown in the same table.

[Sensory evaluation of stickiness]
Ten baby mothers touched the topsheet with the skin care composition by hand, and the stickiness was evaluated according to the following criteria.
○: Not sticky ×: Sticky (If you feel a little sticky ×)

[Comparative Example 1]
A skin care composition was prepared using 5 parts stearyl alcohol to 5 parts diamide derivative. Except this, the skin care composition was applied to the nonwoven fabric in the same manner as in Example 1. And about this nonwoven fabric, evaluation similar to Example 1 was performed. The results are shown in Table 1 below. Moreover, the image image of the presence state of the skin care composition in the nonwoven fabric surface obtained by TOF-SIMS is shown in FIG.3 (b).

  As is clear from the results shown in Table 1, it can be seen that the nonwoven fabric of Example 1 is one in which the occurrence of stickiness is suppressed. On the other hand, it can be seen that the non-woven fabric of Comparative Example 1 perceives a sticky feeling. From the images shown in FIGS. 3 (a) and 3 (b), the nonwoven fabric of Example 1 is discontinuously agglomerated and discretely distributed, whereas the nonwoven fabric of Comparative Example 1 is distributed. It can be seen that the skin care composition is continuously present on the surface of the fiber. In FIGS. 3A and 3B, the bright white site is a site where a diamide derivative is present, and the gray site is a site where stearyl alcohol is present.

M base material S skin care composition

Claims (5)

In an absorbent article formed by applying a skin care composition containing an emollient agent and its immobilizing agent to a member that comes into contact with the skin of the wearer when worn,
Using a diamide derivative represented by the following formula (I) as the emollient,
An aliphatic monoalcohol having 14 to 22 carbon atoms is used as the immobilizing agent,
Using 60 to 90% by mass of the aliphatic monoalcohol based on the total mass of the diamide derivative and the aliphatic monoalcohol,
The skin care composition is discontinuously and discretely present on the surface of the member;
In the measurement of fragment ions using TOF-SIMS for the member, the ratio I _D / I of the fragment ion intensity I _D derived from the diamide derivative to the total intensity I _T of all fragment ions detected _An absorbent article having _T of 0.1 × 10 ^{−2 to} 0.3 × 10 ⁻² .
The absorbent article according to claim 1 , wherein a contact angle between the member to which the skin care composition is applied and ion-exchanged water is 60 degrees or more and 90 degrees or less. The absorbent article according to claim 1 or 2 , wherein a total basis weight of the diamide derivative and the aliphatic monoalcohol applied to the member is 0.3 to ² g / m2. The absorbent article according to any one of claims 1 to 3 , wherein the aliphatic monoalcohol is stearyl alcohol. The absorptive article according to any one of claims 1 to 4 in which said member is a surface sheet or a leak-proof cuff.