JP2002172131A - Adsorptive article and barrier agent for adsorptive article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adsorptive article which prevents a skin rash of a wearing person by the adsorptive article, such as a diaper and sanitary napkin, and does not provide a sticky feel, and a barrier agent to be applied to the surface of the adsorptive article in order to obtain the adsorptive article capable of preventing the skin rash. SOLUTION: The barrier agent for the adsorptive article contains powder capable of improving the touch or is stuck with the powder on its surface, and the adsorptive article which is coated with this barrier agent on its surface is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article which can reduce dermatitis (rash) generated when an absorbent article such as a diaper or a sanitary napkin is worn, and has no sticky feeling. And a barrier agent applied to the surface of the absorbent article to obtain such an absorbent article. More specifically, when wearing absorbent articles such as diapers and sanitary napkins, chemical irritation due to bodily fluids such as stool, urine, menstrual blood, and skin being rubbed by the surface material of the absorbent articles The present invention relates to an absorbent article that can prevent the occurrence of contact dermatitis (rash) due to physical irritation caused by the absorbent article and has no sticky feeling, and a barrier agent applied to the surface of the absorbent article for that purpose.

[0002]

2. Description of the Related Art When wearing absorbent articles such as disposable diapers and sanitary napkins, stool, urine, menstrual blood and other body fluids adhere to the skin or improve the surface properties of the absorbent articles. Occurrence of dermatitis caused by chemicals such as surfactants used to irritate the skin and contact dermatitis caused by physical irritation caused by the skin and the surface material of the absorbent article touching and rubbing the skin Is a problem. In addition, the chemical stimulus and the physical stimulus act synergistically to increase irritation to the skin, resulting in swelling of the skin, and furthermore, the coefficient of friction between the surface material of the absorbent article and the skin. The problem that the number increases.

[0003] In order to prevent such contact dermatitis (rash), it is important to thoroughly wipe off the bodily fluids attached when replacing the absorbent article, and to keep the skin clean. However, it is not possible to completely avoid contact with the bodily fluid that occurs during the time until the bodily fluid adheres and replaces the absorbent article, and to frequently replace the absorbent article to shorten the time for which the bodily fluid adheres But there are limitations.

Further, in order to prevent such contact dermatitis, creams, oils and the like are applied to the skin of wearers such as infants. When changing diapers, it is possible to apply cream, oil, etc. to the buttocks and anus of the wearer, but it is cumbersome to apply each time the diaper is changed, and caregivers who apply cream etc. There is also a hygiene problem that stains hands and infects bacteria, etc., through fingers of caregivers who apply cream etc. to wearers with low skin resistance, such as infants and the elderly. I do.

[0005] Therefore, attempts have been made to solve these problems by applying a skin care substance to the surface of an absorbent article. As one of such attempts, Japanese Patent Application Laid-Open No. 2-1265 discloses a method in which a pH adjusting agent is present in a disposable absorbent article for incontinent persons. This method was developed by discovering that the cause of diaper rash is due to the generation of ammonia, which is caused by bacteria from excrement or by contact between enzymes and urine, which raises the pH of the skin. is there. However, when using a pH adjuster,
It is not possible to prevent rash caused by factors other than ammonia.

Further, Japanese Patent Application Laid-Open No. 10-509895, Japanese Patent Application Laid-Open No. 10-509896, Japanese Patent Application Laid-open No.
JP-A 10082 and JP-A-11-510416 disclose an emollient for improving lubricity,
And a disposable absorbent article provided with a lotion comprising an emollient and a fixing agent for immobilizing the emollient on the surface of the absorbent article. This absorbent article
The emollient dissolves due to body temperature when the absorbent article is worn,
It adheres to the skin, and the transfer of the emollient to the skin can reduce irritation due to bodily fluids, or can be expected to have the effect of protecting the skin from physical irritation accompanying the improvement of the lubricity of the surface of the absorbent article and the skin. However, when the present inventors conducted tests, it was found that
Japanese Patent Publication No. 509895, Japanese Patent Publication No. 10-509896, Japanese Patent Publication No. 11-5100082, and Japanese Patent Publication No.
It has been found that the absorbent article disclosed in Japanese Patent Application Laid-Open No. 1-510416 is still insufficient for preventing rash on a wearer. In addition, in the method of forming an oily emollient agent barrier layer on the surface of the skin, since the oily component adheres to the wearer's skin, a sticky feeling or a slimy feeling is generated, and the wearing feeling of the wearer is deteriorated. In addition, there is also a problem that the feel when touching the absorbent article is deteriorated.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art. That is, it is possible to prevent a wearer's rash due to an absorbent article such as a diaper or a sanitary napkin, and to provide an absorbent article having no sticky feeling, and to obtain such an absorbent article, and to obtain such an absorbent article, the surface of the absorbent article. It is an object of the present invention to provide a barrier agent to be applied to an object. More specifically, by applying to the surface of an absorbent article, contact dermatitis (rash) due to chemical irritation due to body fluids or surfactants, and physical irritation due to friction between the skin and the surface of the absorbent article. It is an object to provide a barrier agent which can be prevented and has no sticky feeling, and to provide an absorbent article coated with the barrier agent.

[0008]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies in order to solve the above-mentioned problems, and as a result, the cause of contact dermatitis (rash) has been attributed to the chemical irritation factor and the physical In addition to the stimulating factor, the present inventors have found that amino acids or sebum, which are body fluid wastes remaining on the skin, irritate the skin, leading to the present invention. More specifically, the present inventors have disclosed the above-mentioned Japanese Patent Application Laid-Open Nos. 10-509895, 10-509896, and 11-5-5.
In the absorbent articles disclosed in Japanese Patent No. 10082 and Japanese Patent Publication No. 11-510416, the lotion composition covers the skin to which the bodily fluid waste adheres, so that the waste tends to deteriorate. It has been found that irritation is caused by skin irritation caused thereby. Thus, the present inventors have conceived of adding an antioxidant to the barrier agent in order to prevent waste products from being oxidized and deteriorated, and have reached the present invention. Furthermore, the present inventors have proposed an absorbent article using the above-mentioned lotion composition as a barrier agent, to improve a sticky feeling or a slimy feeling caused by the oily emollient agent of the barrier agent adhering to the wearer's skin, and to improve the tactile sensation. The present invention has been found that the powder can be reduced by mixing the powder into the barrier agent or by attaching the powder to the barrier agent surface.

That is, the present invention provides (1) a barrier agent for an absorbent article characterized by mixing or adhering to a surface for improving powder feel; Containing a barrier agent for absorbent articles according to (1) above, which is at least one selected from powders, synthetic inorganic powders, organic powders, metal soaps, and synthetic polymer powders, and (3) an oil-soluble antioxidant. (1) or (2), wherein the antioxidant is selected from the group consisting of vitamin A, vitamin B, vitamin D, vitamin E, and vitamin K. (3) Absorbent article barrier agent for absorbent articles according to the above (3), which is a compound of at least one kind of vitamin group, and (5) Absorption according to the above (1) to (4) further containing an emollient and / or a fixing agent. Barrier agent for conductive articles, (6) emollient agent at 25 ° C (8) The barrier agent for absorbent articles according to (1) to (5), which is a liquid or semi-solid oily substance; (7) the barrier agent for absorbent articles according to (6), wherein the emollient is a glycerin fatty acid ester; ) The melting point of the fixing agent is 40 to 90 ° C, and the surface tension at 20 ° C is 25 to 4
The barrier agent for absorbent articles according to (1) to (7), wherein the barrier agent is 5 dyn / cm; and (9) the immobilizing agent is one selected from glycerin fatty acid esters, paraffin wax, and higher alcohols. The present invention relates to the above-mentioned barrier agent (8) for an absorbent article, and (10) an absorbent article having the barrier agent of any one of the above (1) to (9) applied to the surface.

According to the present invention, the presence of the powder for improving the tactile sensation on the surface of the absorbent article not only can improve the tactile sensation of the wearer, such as stickiness or slimy feeling, but also particularly in the case of high temperature and humidity in summer. The feeling or slimy feeling becomes a hot image, and it can be expected that the wearer or the purchaser of the absorbent article can be prevented from decreasing the purchase motivation. Further, by improving the sticky feeling, it is possible to improve the skin condition of the wearer.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail, but the present invention is not limited thereto. The absorbent article according to the present invention includes a paper diaper, a sanitary napkin,
Orimono liner, incontinence pants, training pants,
Diaper holders and the like. The barrier agent of the present invention can be applied to portions of these absorbent articles that come into contact with the skin, for example, top sheets, three-dimensional gathers, side flaps, waist gathers, and the like. In particular, stool,
It is preferable to apply it to the top sheet portion where urine often adheres.

The powder used for improving the tactile sensation of the present invention is selected from pulverized natural inorganic powders such as clay minerals, synthetic inorganic powders, organic powders, metal soaps and synthetic polymer powders. More than one kind. If the average particle size of the powder is too small, the stickiness of the barrier agent cannot be suppressed, and if the average particle size is too large, a rough feeling is generated.
m is preferable, and further preferably 0.5 to 25 μm.

Typical examples of the natural inorganic powder include ground clay minerals such as talc, kaolin, sericite, and mica. Examples of the synthetic inorganic powder include calcium carbonate, magnesium carbonate, silicic anhydride, zinc oxide, and titanium oxide. As the synthetic organic powder, an amino acid-based powder is preferable, and N-lauroyl-L-lysine is particularly preferable. As synthetic polymer powder, polyethylene powder, nylon powder, polyacrylic acid, cross-linked polystyrene,
Examples include a methylsiloxane network polymer and methacrylic resin powder. As a metal soap, there is little irritation to the skin,
Fatty acid salts such as aluminum, zinc, magnesium, and calcium used as cosmetic raw materials can be used. Specific examples include aluminum stearate, zinc stearate, magnesium stearate, calcium stearate, zinc aluminate, zinc myristate, magnesium myristate, zinc laurate, and zinc undecylenate.

The antioxidant is preferably an oil-soluble antioxidant that is compatible with the oil-based emollient. Examples of oil-soluble substances having an antioxidant function include vitamins such as vitamin A group, vitamin B group (riboflavin tetrabutyrate, riboflavin tetranicotinate, etc.), vitamin D group, vitamin E group, and vitamin K.
A group of vitamins, BHT (2,6-di-
t-butyl-p-cresol), BHA (butylated hydroxyanisole) and propyl gallate.
These antioxidants may be used alone or as a mixture.

Preferred are the vitamins. Vitamins are known to be highly safe for the human body and have few side effects, and are widely used in cosmetics and other products that come into direct contact with the skin. It is preferable because there is. In the present invention, the term "vitamin group" includes vitamins and their derivatives. Particularly preferred compounds which exhibit the properties of the present invention are the vitamin E group, vitamin E (tocopherol), its isomers and its derivatives, DL-
α-Tocopherol, DL-α-tocopherol acetate, DL-α-tocopherol succinate, DL-α-tocopherol calcium succinate and the like. Vitamin E is particularly preferable because of its high antioxidant power among vitamins.

In the present invention, an emollient agent refers to a lubricity improving substance having a function of softening, relaxing, supple, covering, smoothing, moisturizing or cleansing the skin. Preferred as emollients are
It is a liquid or semi-solid oily component at normal temperature (25 ° C).

[0017] Substances known as emollients (for example, the above-mentioned JP-A-10-509895, JP-A-10-50989)
0-509896, JP-A-11-51082 and JP-A-11-510416) can all be used, but useful substances include petroleum hydrocarbons, animal and vegetable oils and fats, and animal and vegetable substances. Examples include waxes, fatty acid ester compounds, alkyl ethoxylates, fatty acid ester ethoxylates, fatty alcohols, and polysiloxanes.

For example, as vegetable oil, grape seed,
Drying oils such as safflower and soybean oil, semi-drying oils such as sesame oil, corn oil, cottonseed oil, rapeseed oil, sunflower oil, avocado oil, almond oil, olive oil, sasanqua oil, camellia oil, persic oil, castor oil, peanut oil, etc. And preferably a semi-dry oil or a non-dry oil having little change over time. As vegetable fats, cocoa butter, palm oil, palm kernel oil, macadamian nut oil, mokuro,
Palm oil and the like. Examples of the vegetable wax include carnauba wax, candelilla wax, jojoba oil and the like.
Animal fats and oils include turtle oil, mink oil, egg yolk oil, beef tallow, pork oil, sardine oil, shark liver oil, herring oil and the like. Animal waxes include whale wax, beeswax, lanolin and the like. Further, as a hydrocarbon compound,
Examples thereof include dialkyl carbonate having 14 to 15 carbon atoms, vaseline, paraffin, squalane, pristane, ozokerite, sericin, and microcrystalline wax. These animal and vegetable fats and oils, animal and vegetable waxes, or hydrocarbon compounds may be substances in which unsaturated portions are hydrogenated. The emollient may be a single compound of these compounds or a mixture thereof.

Preferred are fatty acid esters, with glycerin fatty acid esters being more preferred. The glycerin fatty acid ester may be any of monoglyceride, diglyceride, and triglyceride. The fatty acid of the glycerin fatty acid ester has 2 to 35, preferably 8 to 22 carbon atoms. Particularly preferred are coconut oil fatty acid triglycerides. Palm oil fatty acid triglycerides are highly safe for the human body and have few side effects. Further, triglyceride is a component constituting sebum, and selection of triglyceride is particularly preferable because sebum is known as a substance having an emollient effect on the surface of human skin.

The immobilizing agent is a substance capable of immobilizing and immobilizing an emollient on the surface of an absorbent material.
It is a substance that exhibits solubility or dispersibility in fats and oils and increases the viscosity of the emollient agent when mixed with the emollient agent, so that it can be applied to the surface of an absorbent article. The fixing agent has a melting point of 40-90 ° C, 20 ° C
Is preferably 25 to 45 dyn / cm.

As the immobilizing agent, for example, the above-mentioned JP-T-Hei 10
JP-A-509895, JP-T-10-509896, JP-T-11-51082, and JP-T-1
All the substances described in 1-510416 can be used. Preferred substances are animal and vegetable fats and oils, fatty acid esters, paraffin wax, higher alcohols and ethoxylated alcohols which are highly safe for the human body and have few side effects, more preferably glycerin fatty acid esters having a melting point of 40 to 90 ° C., carbon number These are esters of dextrins with 12 to 22 fatty acids, paraffin wax, and higher alcohols.

As the emollient or the fixing agent, animal and vegetable fats and oils can be used as described above. As plant-derived fats and oils, coconut oil, cacao butter, cottonseed oil, peanut oil, soybean oil, olive oil, shea nut oil, etc. These natural fats and oils
Since the physical properties such as the melting point are not stable, it is difficult to control the physical properties. For this reason, the glycerin fatty acid ester obtained by once hydrolyzing these fats and oils and separating them into fatty acids and glycerin, purifying the necessary fatty acids by distilling the fatty acids, and then bonding the fatty acids and glycerin again is used. It is preferable to use an emollient or immobilizing agent whose physical properties are controlled.

The glycerin fatty acid ester may be any of monoglyceride, diglyceride and triglyceride, but the fatty acid portion preferably has 2 to 35 carbon atoms, particularly preferably 8 to 22 carbon atoms. Most preferred are stearic acid monoglyceride, lauric acid monoglyceride.

Examples of the fatty acid dextrin esters include dextrin palmitate, dextrin stearate, dextrin behenate, dextrin myristylate, dextrin of coconut oil, and dextrin laurate. Preferred paraffin wax has 1 carbon atom.
6-40, melting point 40-90 ° C, specific gravity 0.88 at 20 ° C
~ 0.92. Higher alcohols have 1 carbon atom
4-32, especially 16-22 alcohols, most preferred is stearyl alcohol. These fixing agents may be used alone or as a mixture.

The barrier agent of the present invention may be composed of an antioxidant and an emollient, or may be composed of an antioxidant and a fixing agent, or may be composed of an antioxidant, an emollient and a fixing agent. And may be composed of

The barrier agent of the present invention includes, in addition to powder for improving the feel, an antioxidant, an emollient and a fixing agent, substances commonly used for improving the properties of absorbent articles. It can be optionally contained. They include anti-inflammatory components, pH adjusters, surfactants to improve absorption. Further, an antibacterial agent and a humectant can be contained. Buttons,
Naturally occurring anti-inflammatory agents such as ogon, hypericum, chamomile, licorice, syrup, mugwort and perilla extract, and synthetic anti-inflammatory agents such as allantoin and dipotassium glycyrrhizinate are used. As a compound that keeps the skin weakly acidic
Although an H adjustor can be added, malic acid, succinic acid, citric acid, tartaric acid, lactic acid and the like are used as such a pH adjuster. As the surfactant for improving the absorbability, a surfactant having low skin irritation such as sucrose fatty acid ester is selected.

The powder used in the present invention for improving the tactile sensation may be mixed with a barrier agent comprising an antioxidant, an emollient, and a fixing agent, or may be adhered to the surface of the barrier agent. Is also good. To explain the form,
Examples include the following: (1) A powder for improving the tactile sensation is mixed with a three-component barrier agent comprising an emollient agent, an antioxidant and a fixing agent, and the mixture is present in a single layer on the surface of the absorbent article. In this case, the weight ratio of the emollient to the antioxidant: fixing agent is 5 to 95:95 to 5, preferably 30 to 70: 7.
0 to 30, powder for the three-component barrier agent,
0.001 to 70% by weight, preferably 0.01 to 40% by weight is mixed. The amount of the barrier agent mixed with the powder is 0.5 to 50 g / m ² per surface area of the absorbent article, preferably,
1 to 30 g / m ² .

(2) A three-component barrier agent comprising an emollient, an antioxidant and a fixing agent is present in a single layer on the surface of the absorbent article. In this case, the weight ratio of the emollient and the antioxidant: the immobilizing agent is 5 to 95:95 to 5,
Preferably, the ratio is 30 to 70: 70 to 30, and the amount of the barrier agent is 0.5 to 50 g / surface area of the absorbent article.
m ² , preferably 1 to 30 g / m ² . 0.001 to 70% by weight, preferably 0.01 to 40% by weight of a powder for improving the tactile sensation is attached to the surface of the three-component barrier agent layer that contacts the skin of the wearer.

(3) The barrier agent may be present in multiple layers on the surface of the absorbent article. In this case, (i) a two-component mixture of an emollient and a fixing agent is present on the absorbent article side, and a three-component mixture of an emollient, an antioxidant and a fixing agent is provided on the surface in contact with the skin thereon. Or (ii) a two-component mixture of an emollient and an immobilizing agent is present on the absorbent article side, and the two-component mixture of an antioxidant and an immobilizing agent is It is desirable to have a component mixture. In (i) or (ii), powder for improving the tactile sensation is mixed on both the absorbent article side and the skin contact side, or the powder is mixed only on the skin contact side. Or let
The powder adheres to the surface of the surface that comes into contact with the skin.

By forming such a multilayer, the amount of the antioxidant to be added to the surface which comes into contact with the skin can be increased, and the antioxidant can be protected before the emollient agent covers the waste attached to the skin. Since the agent can be adhered to the skin, the effects of the present invention can be further exhibited. Further, since the antioxidant is expensive, these methods are preferred in which a large amount of antioxidant can be blended on the surface which is easily in contact with the skin, so that the effect can be exhibited with a small amount.

In (i) and (ii), the weight ratio of the emollient to the immobilizing agent of the two-component mixture on the absorbent article side is 5 to 95:95 to 5, preferably 30 to 70:70.
３０30, and 0.25 to 2 per surface area of the absorbent material.
5 g / m ^2, preferably, 0.5 to 15 g / m ² is preferred. In (i), the three-component mixture on the side that comes into contact with the skin is:
Emollient and antioxidant: immobilizing agent weight ratio of 5
95:95 to 5, preferably 30 to 70:70 to 30, and the amount per surface area of the absorbent material is 0.25 to 2
5 g / m ^2, preferably from 0.5 to 15 g / m ^2. In (ii), the two-component mixture on the side in contact with the skin is
The weight ratio of antioxidant: fixing agent is 5 to 95:95 to 5,
Preferably 30 to 70: a 70 to 30, the amount per surface area of the absorbent material, 0.25~25g / m ^2, preferably from 0.5 to 15 g / m ^2.

In both (i) and (ii), the powder is mixed with 0.001 to 70% by weight, preferably 0.01 to 40% by weight of the barrier agent. When the powder is applied to the surface, an amount of 0.001 to 70% by weight, preferably 0.01 to 40% by weight of the barrier agent is also applied.

In both cases (1) and (2), which are present in a single layer, and (3), a barrier agent is applied to the entire surface of the absorbent article that comes into contact with the skin. Is 5 to 90%, preferably 10 to 70%.

As a method of applying the barrier agent on the surface of the absorbent article, a usual coating method can be adopted. In the case of application to a liquid-permeable surface material, particularly in a coated portion, since the liquid permeability is reduced, it is necessary that the hydrophilic portion and the coated portion coexist on the sheet surface portion. For this purpose, it is preferable to apply a barrier agent in a patterned form, and gravure coating or flexo coating, which is an application of printing technology, can be applied. Further, an extrusion coating method, a slot, and a spray coating method using a heat-sensitive adhesive coating technique may be applied. By these coating methods, it is also possible to perform multi-layer coating. The powder is mixed with the barrier agent at the time of applying the barrier agent and applied, or the powder is adhered to the surface of the absorbent article after the application of the barrier agent. The method of adhering the powder is as follows: (i) a method of mixing with air and spraying it from a nozzle onto a substrate, and (ii) a method of feeding the powder onto a cylindrical roller or a continuous belt and transferring the powder to the substrate. (Iii) a method in which powder is directly fed onto a substrate, and (iv) a method in which powder is charged with static electricity, floated in a coating machine, and adhered by passing the substrate through it. .

The barrier substance of the present invention is applied to the surface of the absorbent article in contact with the skin, but is usually applied to the top sheet of the absorbent article. The substrate to which the barrier agent is applied is not limited, but is usually a sheet having liquid permeability, a nonwoven fabric,
Liquid-permeable apertured films and the like. The nonwoven fabric used for the absorbent article is 10 to 50 g / m ² composed of 1 to 5 d fibers.
Non-woven fabric. The fibers constituting the nonwoven fabric may be any of synthetic fibers such as polyolefin and polyester, semi-synthetic fibers such as rayon, and natural fibers such as cotton, pulp and silk. The aperture film that can be used is a liquid-permeable aperture film that is extruded from a thermoplastic polymer film and then opened with a hot needle, emboss, hot air, or the like. As the thermoplastic resin constituting the apertured film, polyethylene (density 0.86 to 1.1 g / cm ³ ), polypropylene (density 0.89 to 1.2 g / cm ³ ), etc., alone or in a multilayer,
Mixtures can be used. A sheet-like material having liquid permeability is required to have a permeability of body fluid, and has a water pressure of at least 0 to 300 mmH according to JISL1092 (Water resistance test method for textile products, water resistance test A method (low water pressure method)). ₂ O is required. Further, the flow of water vapor from the surface material to the absorber, that is, air permeability is required, and the air permeability according to JIS L1906 (test method for general long-fiber nonwoven fabric, air-permeable Frazier method) is at least 5 to 700 cm ³ / cm ^2. / Sec is required.

The barrier agent of the present invention is applied not only to absorbent articles, but also to skin care dry wipes such as wound protection sheets, tissue paper and toilet paper, and to skin care wet wipes such as wet tissues. It is also possible to prevent contact dermatitis (rash) by the use of a. When applied to wet wipes, the barrier agent of the present invention is applied to the surface of the wipes and then impregnated with an aqueous chemical. In such wet wipes, since an oily region and an aqueous region exist on the sheet surface, water-soluble dirt can be removed in the aqueous region, and an anti-inflammatory effect by a water-soluble anti-inflammatory agent can be expected,
By wiping, it is possible to prevent contact dermatitis (rash) due to the oily barrier attached to the skin surface.

Hereinafter, examples of the present invention will be described, but the present invention is not limited thereto.

Example 1 Palm oil fatty acid triglyceride as an emollient agent, stearyl alcohol as an immobilizing agent, vitamin E as an antioxidant, talc as a powder for improving tactile sensation, weight ratio of 45.0: 45.0: 5.0:
It melt-mixed so that it might be set to 5.0, and was set as the barrier agent. This barrier agent was applied to the surface material of the diaper in a vertical stripe pattern of 20 g / m ² .

The diaper is composed of a liquid-permeable top sheet, an absorbent body made of pulp and a highly water-absorbent resin for absorbing and retaining body fluids, and a polyethylene film back sheet. An assembling diaper was used. As the top sheet, a nonwoven fabric of 25 g / m ² to which polyolefin fibers were fused and bonded was used. The nonwoven fabric for a top sheet was continuously supplied, and the barrier agent produced in advance as described above was heated and melted, coated with a coater, and cooled. The diaper was manufactured by assembling the top sheet coated with the barrier agent together with the absorber and the back sheet.

[Tactile Feeling Test] After the diaper was worn on an infant for 5 hours, the tactile sensation of the diaper surface and buttocks was evaluated by the following five-point evaluation method. Level 1: Very sticky Level 2: Slightly sticky Level 3: Non-sticky Level 4: Slightly sticky Level 5: Very sticky As a result, the diaper surface feel is level 4, and the infant's hips feel is level. It was 3.

[Presence of Oxidizing Odor] After the diaper was worn on the infant for 5 hours, the odor was sensuously judged.

[Presence of Oxidation of Fats and Oils] The presence or absence of oxidation of fats and oils after wearing a diaper on a baby for 5 hours was determined by the following skin surface lipid analysis method. (I) Using absorbent cotton impregnated with a mixed solvent of acetone: ether = 1: 1, the skin surface lipid was 0.4 m from the diaper attachment part.
g were collected. (Ii) Lipids were extracted with ether, and the extract was dried under reduced pressure with an aspirator under a nitrogen stream at 30 ° C. or lower. (Iii) 0.4 mg of the dried product of (ii) is dissolved in 100 μL of 1-butanol, and 10 μL thereof is CL (chemiluminescence).
-Injected into the HPLC system. CL-HPLC conditions are as follows. Column: CAPCELL-PAKC18 (25 cm × 4.6 m
m) Column temperature: 25 ° C. Solvent: methanol Emission indicator solvent: (10 μg / ml cytochrome C + 1.0
(μg / ml) borate buffer (pH = 9.3) Flow rate: 1.1 ml / min Detector: Chemiluminescence Analyzer (iv) As a result of analysis, when a peak was observed, it was determined that oxidation of fats and oils occurred.

[Test of Skin Condition] The diaper was mounted on a healthy infant having no erythema or the like in the vulva. The average of eight diapers was changed every day, and one week later, the condition of the skin was visually observed. As a result, there was no change in the condition of the skin. These results are summarized in Table 2.

[0043]

Example 2 The test was performed in the same manner as in Example 1 except that the powder was attached to the surface of the barrier agent instead of mixing the powder with the barrier agent. As a result of the tactile sensation test, the diaper surface was level 5 and the tactile sensation of the infant's buttocks was level 4. further,
There was no oxidized smell of the oil and fat, no oxidation of the oil and fat was observed, and there was no change in the skin condition by the skin condition test. The results are summarized in Table 2.

[0044]

Example 3 A test was conducted in the same manner as in Example 1 except that zinc stearate was used in place of the powder used for improving the feel.
Table 2 shows the results.

[0045]

Example 4 A test was conducted in the same manner as in Example 2 except that zinc stearate was used in place of the powder used for improving the feel.
Table 2 shows the results.

[0046]

Example 5 A test was performed in the same manner as in Example 1 except that the stabilizing agent was changed to stearic acid monoglyceride. Table 2 shows the results
Shown in Here, the stearic acid monoglyceride was obtained by hydrolyzing beef tallow and separating it into fatty acid and glyceride, and then glycerin-esterifying the stearic acid fraction obtained by distillation.

[0047]

Example 6 A test was conducted in the same manner as in Example 3, except that the stabilizing agent was changed to monoglyceride stearate. Table 2 shows the results
Shown in The stearic acid monoglyceride used was Example 5
Is the same as

[0048]

Example 7 A test was conducted in the same manner as in Example 1 except that lauric acid monoglyceride was used as a fixing agent. Table 2 shows the results. Here, lauric acid monoglyceride was obtained by hydrolyzing beef tallow and separating it into fatty acid and glyceride, and then glycerin-esterifying the lauric acid fraction obtained by distillation.

[0049]

Example 8 A test was conducted in the same manner as in Example 3 except that lauric acid monoglyceride was used as a fixing agent. Table 2 shows the results. The lauric acid monoglyceride used was the same as in Example 5.

[0050]

Comparative Example 1 Palm oil fatty acid triglyceride: stearyl alcohol: vitamin E without powder contained in the barrier agent
Was tested in the same manner as in Example 1 except that the diaper was coated at a weight ratio of 47.5: 47.5: 5.0. As a result, both the diaper surface and the buttocks of the infant were at a level 1 where they were very sticky. There was no change in skin condition.

[0051]

Comparative Example 2 The same procedure as in Example 2 was carried out except that the barrier agent contained neither powder nor antioxidant, and the weight ratio of coconut oil fatty acid triglyceride: stearyl alcohol was 50.0: 50.0 to diapers. Tested as in 1. As a result, both the diaper surface and the buttocks of infants were at a level 1 where they were very sticky, had a fat-and-oil oxidation smell, had fats and oils oxidized, and had slight erythema on the skin.

The above Examples 1 to 8 and Comparative Examples 1 and 2 were
The results are summarized in Tables 1 and 2.

[Table 1]

[0053]

[Table 2]

As is clear from Tables 1 and 2, the addition of powder to the barrier agent prevents oxidation of fats and oils in the absorbent article coated with the barrier agent, and changes the skin condition even when worn. It turns out that it is gone. Examples 5 to 8
In the above, beef tallow was used as a raw material for producing stearic acid monoglyceride and lauric acid monoglyceride, but similar effects can be obtained by using not only beef tallow but other fats and oils such as coconut oil.

[0055]

By applying the absorbent article barrier agent of the present invention to the surface of an absorbent article, the absorbent article is not sticky even when worn for a long time, and no rash on the skin is observed. Was able to be played.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tomoko Endo 1531-7 Wadahama Takasuka, Toyohama-cho, Mitoyo-gun, Kagawa Prefecture F-term in Unicharm Corporation Technical Center 3B029 BB05 BD22 4C003 HA00 4C098 AA09 CC01 DD03 DD05 DD10 DD14 DD16 DD21 DD25 DD27 DD28 4J038 BA211 EA012 HA006 HA506 JA22 JA43 JA55 KA02 KA08

Claims (10)

[Claims] 1. A barrier agent for an absorbent article, wherein a powder for improving the tactile sensation is mixed or adhered to the surface. 2. The powder is a natural inorganic powder, a synthetic inorganic powder,
The barrier agent for an absorbent article according to claim 1, wherein the barrier agent is at least one selected from an organic powder, a metal soap, and a synthetic polymer powder. 3. The barrier agent for an absorbent article according to claim 1, further comprising an oil-soluble antioxidant. 4. An antioxidant comprising a vitamin A group and a vitamin B group
The barrier agent for an absorbent article according to claim 3, which is at least one compound selected from the group consisting of vitamins, a vitamin D group, a vitamin E group, and a vitamin K group. 5. The barrier agent for an absorbent article according to claim 1, further comprising an emollient and / or a fixing agent. 6. The barrier agent for an absorbent article according to claim 1, wherein the emollient is a liquid or semisolid oily substance at 25 ° C. 7. The barrier agent for an absorbent article according to claim 6, wherein the emollient is a glycerin fatty acid ester. 8. A fixing agent having a melting point of 40 to 90 ° C.
The barrier agent for an absorbent article according to any one of claims 1 to 7, wherein the surface tension at 25C is 25 to 45 dyn / cm. 9. The barrier agent for an absorbent article according to claim 8, wherein the fixing agent is at least one selected from glycerin fatty acid ester, paraffin wax, and higher alcohol. 10. An absorbent article having a surface coated with the barrier agent according to claim 1.