JP2002326902A - Wet wiper containing antiseptic and mildewproofing composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a wet wiper exhibiting antiseptic and mildewproofing effects, having low skin irritation and excellent feel in use. SOLUTION: Both an amidoamine type surfactant and an amino acid type surfactant exhibiting cationic properties are used in a solution for wet wiper impregnation and the solution containing the surfactants is adjusted to pH >=3 and <=5. An organic acid is sued as a pH adjuster in the adjustment. The solution thus obtained is impregnated into a base fabric such as a nonwoven fabric to give the wet wiper.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet wiper containing an antiseptic / antifungal composition, and more particularly to a wet wiper used for wiping skin such as limbs, face, buttocks and local parts, and the human body.

[0002]

2. Description of the Related Art Cosmetics and the like are formulated with a composition having an antiseptic and antifungal effect in order to prevent contamination by an unspecified number of microorganisms. JP-A-2000-191521 describes a combination of a quaternary ammonium salt and a paraben (such as paraoxybenzoate) as an antiseptic / antifungal agent. The quaternary ammonium salts include benzalkonium chloride and the like, which are generally used as fungicides, and the parabens such as ethylparaben and methylparaben, which are generally used as preservatives.

[0003] In addition, the above-mentioned publication describes a germicidal disinfectant in which a liquid containing a quaternary ammonium salt and an amino acid type surfactant is moistened with absorbent cotton, gauze or the like.

[0004]

However, parabens used as preservatives cannot exert their effects unless they are used in large amounts, and when they are used in large amounts, they cause burning and stinging to the skin. There was a problem of giving a stimulus such as. In particular, a wet wiper, unlike liquid cosmetics sealed in a container, is easily exposed to the outside air, and therefore needs to be incorporated in a large amount in order to exhibit the antiseptic and antifungal effect.

Also, since parabens have poor solubility in water, it is necessary to incorporate a solubilizing agent for polyhydric alcohols and lower alcohols having good solubility with parabens. However, a large amount of polyhydric alcohol causes a sticky feeling, and a lower alcohol lowers the moist feeling of the skin and causes a crisp feeling. There is also a problem that parabens crystallize and precipitate at low temperatures.

On the other hand, although quaternary ammonium salts have a germicidal and disinfecting effect, they are highly irritating to the skin and are not suitable for use as wet wipers that directly touch the human body. In particular, it is not applicable to sensitive parts such as the face and hips.

The present invention has been made to solve the above problems, and
An object of the present invention is to provide a wet wiper containing an antiseptic / antifungal composition having low skin irritation without impairing the feeling of use.

[0008]

Means for Solving the Problems The present invention provides that a liquid containing an amidoamine type surfactant and a cationic amino acid type surfactant is adjusted to a pH of 3 to 5 and impregnated in a base cloth. It is a feature.

In the present invention, since it is not necessary to mix a large amount of parabens, a large amount of alcohols, and quaternary ammonium salts, the antiseptic and antifungal effect can be exhibited without giving a burning or tingling sensation. In addition, the feeling of use is not impaired.

For example, when the amidoamine type surfactant is diethylaminoethylamide stearate or dimethylaminopropylamide stearate,
The antiseptic and antifungal effect is particularly effectively exhibited. When the cationic amino acid type surfactant is N-coconut fatty acid acyl-L-arginine ethyl / DL-pyrrolidone carboxylate, an antiseptic and fungicidal effect is particularly effectively exhibited.

In this case, the amidoamine type surfactant and the amino acid type surfactant are present in a weight ratio of 10: 1 to 1: 1.
It is preferable to mix them at a ratio of 1:10. When blended in such a manner, the antiseptic and antifungal effect and the anti-irritant effect can be synergistically exhibited.

It is preferable from the viewpoint of handling and safety that an organic acid is blended with the liquid and the pH is adjusted to 3 or more and 5 or less. In this case, the organic acid is preferably one or more selected from salicylic acid, benzoic acid, sorbic acid, citric acid, glutamic acid, lactic acid and pyrrolidone carboxylic acid. Further, the base fabric is preferably a nonwoven fabric.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The wet wiper of the present invention is obtained by impregnating a base cloth with a liquid containing an antiseptic and fungicidal composition. Used for

The base fabric used for the wet wiper may be water-decomposable or non-water-decomposable.
Examples of the water-disintegrable base fabric include pulp-based paper and non-woven fabric, and non-woven fabric obtained by mixing other fibers such as fiber sheet or rayon having heat-fusibility with pulp, and have good dispersibility in water. Things are used. The term “dispersibility in water” as used herein has the same meaning as water dissolvability, and refers to a property in which fibers come apart when they come into contact with a large amount of water. In addition, the water dispersible fiber has a fiber length of 1
It is preferable that the diameter be 0 mm or less, since the water dissolving property is improved.
This fiber length means an average fiber length.

A wet wiper using a water-disintegrable base cloth can be used as a wet tissue used for human skin such as wipes on the human body, or as other products that may be discarded in water and processed.

The non-water-decomposable base fabric is formed of natural fibers, regenerated fibers such as rayon, synthetic fibers such as polyester, polypropylene, polyethylene, acrylic, nylon and the like, or fibers obtained by mixing these fibers. Fiber sheet or non-woven fabric. For example, the core is a polyester, the sheath is a composite fiber of polyethylene, the core and the sheath are polyester composite fibers, the core is a polyester, the sheath is a composite fiber of polypropylene, the core and the sheath are a composite fiber of polypropylene, the core is polypropylene, and the sheath is polyethylene. Composite fibers and the like can be used. Alternatively, fibers formed of a single resin such as polyethylene, polypropylene, polyester, acryl, and nylon may be used.

The method for producing a water-disintegratable or non-water-disintegrable nonwoven fabric may be either dry or wet, but a spunlace method capable of forming a bulky and flexible nonwoven fabric is particularly preferred. In the case of a water-disintegratable nonwoven fabric, it is preferable to adjust the fiber so that the entanglement between the fibers is not so strong that the water-disintegrability is reduced. In the case of a non-water-disintegratable nonwoven fabric, a spun bond method or another method may be used.

The liquid containing the preservative and fungicide composition impregnated in the wet wiper contains an amidoamine type surfactant and a cationic amino acid type surfactant.

The amidoamine type surfactants include:
Examples thereof include diethylaminoethylamide stearate and dimethylaminopropylamide stearate. At this time, the addition amount is 0.1 g per 1 g of the base cloth.
mg or more, more preferably 1 mg
Not less than 500 mg. If the added amount is less than 0.1 mg, the antiseptic and fungicidal effect cannot be sufficiently exhibited, and if it exceeds 500 mg, irritation to the skin occurs.

Examples of the cationic amino acid-type surfactant include N-coconut fatty acid acyl-L-arginine ethyl / DL-pyrrolidone carboxylate (Ajinomoto Co .; trade name "CAE"). Can be
It is not limited to this. The amount added at this time is preferably 0.1 mg or more, more preferably 1 mg or more and 500 mg or less, per 1 g of the base fabric.
When the added amount is less than 1 mg per 1 g of the base cloth, the antiseptic and antifungal effect is inferior, and when it exceeds 500 mg, skin irritation occurs.

The content ratio of the amidoamine type surfactant to the cationic amino acid type surfactant is from 10: 1 to 1:10 by mass (including 10: 1 and 1:10).
And more preferably 5: 1 to 1: 5 (including 5: 1 and 1: 5). By setting the content ratio within the above range, the antiseptic and antifungal effect and the skin irritation preventing effect can be exhibited synergistically.

In the present invention, the pH of the solution containing the amidoamine surfactant and the cationic amino acid surfactant is set to 3 or more and 5 or less. Thus the pH
Is set in the range of 3 or more and 5 or less, the antiseptic and antifungal effect can be strongly exhibited, and the solubility can be further improved.

As a method for adjusting the pH within the above range, inorganic acids such as hydrochloric acid and sulfuric acid, and organic acids such as salicylic acid, sorbic acid, benzoic acid, citric acid, glutamic acid, lactic acid, and pyrrolidone carboxylic acid are used as pH adjusting agents. One or two or more selected from the following can be added. It is preferable to use an organic acid from the viewpoint of handling and safety. More preferably, the pH is preferably adjusted by adding salicylic acid, sorbic acid, and benzoic acid, which themselves have a preservative effect.

In addition, the preservative and fungicidal composition may contain an aqueous solvent or an oily solvent having little skin irritation. As the aqueous solvent, for example, water, ethanol, isopropanol,
One or more selected from polyhydric alcohols such as propylene glycol can be added. Examples of the oily solvent include alcohols such as octyldodecanol, fatty acids such as stearic acid and oleic acid, oils and fats such as olive oil and castor oil, lanolin, jojoba oil, waxes such as beeswax, liquid paraffin, and petrolatum. And one or more selected from hydrocarbons such as squalene, esters such as isopropyl myristate and cetyl 2-ethylhexanoate, and silicone oils such as methylpolysiloxane. Alternatively, an emulsion may be obtained by mixing an aqueous solvent and an oily solvent.

If necessary, the antiseptic / antifungal composition may contain an ultraviolet absorber, an antioxidant, a sequestering agent, a deodorant, an anti-inflammatory, an antiperspirant, a freshener, a bactericide, and the like. Can be blended.

The pH adjuster used in the antiseptic and fungicidal composition is added in an appropriate amount at the final stage after all other necessary solvents have been added to adjust the pH to 3 or more and 5 or less. You. The pH at this time is a value measured at almost normal temperature.

The liquid containing the antiseptic and fungicidal composition formed as described above is impregnated into a fiber sheet or a nonwoven fabric to form a wet wiper.

FIG. 1 is a perspective view showing a package for accommodating the wet wiper, and shows a state in which a lid member is pulled up. The packaging material forming the package 1 is, for example, a laminate film (laminated film) in which a PET (polyethylene terephthalate) film, an aluminum foil, and a sealant layer are laminated in this order from the front side. The laminated film is vertically sealed in the longitudinal direction on the bottom surface side of the package 1, and laterally sealed at both ends in the longitudinal direction to form horizontal seal portions 1 b, 1 b. Thereby, a substantially cubic soft sealed package 1 is formed. Inside the package 1, the wet tissue (wet tissue) 3 of the present invention is folded, and is further stacked and stored.

An elliptical opening 1 is provided on the upper surface of the package 1.
The cover 2 covering the opening 1a is peelably joined to the periphery of the opening 1a via an adhesive layer such as a pressure-sensitive adhesive. The cover 2 is formed of, for example, a biaxially stretched film of polypropylene or the like, and an adhesive layer such as a pressure-sensitive adhesive is formed on almost the entire back surface of the cover 2.

The tip 2a of the lid 2 is a knob which is not adhered to the surface of the package 1. The distal end 2a is pinched, the lid 2 is peeled off from the surface of the package 1, the lid 2 is pulled up to a position where the base 2b does not separate from the package 1, and the wet tissue 3 is taken out from the opening 1a.

The wet tissue 3 formed as described above is usually folded so as to have a compact size, and a plurality of folded wet tissues 3 are vertically stacked to form a sealable package. It is stored in 1. At the time of use, the wet wipers are taken out of the package 1 one by one. Although the package 1 is soft, the wet tissue 3 may be stored in a hard case, or a lid that can be opened and closed at the top of the soft package shown in FIG. It may be stored in a hard case provided with a body.

[0032]

EXAMPLES Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

In Examples 1 to 6 and Comparative Examples 1 to 8, polyester fibers, polypropylene fibers, and cotton fibers were blended at a ratio of 40% by mass, 40% by mass, and 20% by mass, respectively, and manufactured by a spunlace method. Nonwoven fabric was used. A liquid composed of the preservative and fungicide composition having the compounding ratio shown in Table 1 was immersed in the nonwoven fabric so that the weight of the liquid was 2.5 times the weight of the nonwoven fabric to obtain a wet wiper.

However, the unit of each numerical value in Table 1 is parts by weight of each component with respect to 100 parts by weight of purified water.
However, sorbic acid and salicylic acid used as pH adjusters were added in an appropriate amount at the final stage in which all other components were blended, and the pH was adjusted to each value in Table 1.

The POE (20) lauryl ether shown in Table 1 is used as a solubilizing agent for N-coconut fatty acid acyl-L-arginineethyl DL-pyrrolidonecarboxylate. The kind of the solvent is not limited as long as it is a hydrophilic nonionic surfactant. POE is an abbreviation for polyoxyethylene, and the number in parentheses indicates the number of moles of ethylene oxide added. EDT in the table
A-2Na means disodium ethylenediaminetetraacetate, and is blended as a sequestering agent component. Hinokitiol is also blended as a bactericide component.

(Evaluation Method) Skin Tenderness Test 1 The state of the skin after wiping the inner part of the forearm of the monitor of 10 healthy men with the wet wiper was observed. The state of the skin immediately after wiping and after 3 hours was observed, and judgment was made based on whether or not roughness or redness occurred. The case where roughness or redness occurred was represented by x, and the case where it did not occur was represented by ○.

Skin Tenderness Test 2 The faces of 10 monitors of women in their twenties who claim to have sensitive skin were wiped with the wet wiper, and the feeling of the skin after wiping was evaluated. At this time, evaluation was made based on whether or not a tingling sensation or stinging occurred on the skin. The case where a tingling or burning sensation occurred on the skin was represented by x, and the case where it did not occur was represented by ○.

Feeling of Use The feeling of the wet wiper itself when the hand, face and body were wiped with the wet wiper was evaluated using a monitor of 20 women. If you feel good without stickiness,
The case where stickiness and swelling were felt was represented by x.

Antiseptic and antifungal test Antibacterial and antifungal handbook (page 843, Gihodo, 1986)
, A microorganism cultured in advance is inoculated with 1 × 10 ⁵ fungi (mold and yeast) per 1 g of wet wiper, and inoculated with 1 × 10 ⁶ bacteria. Then, a change with time from day 1 to day 28 was observed. The case where the presence of the microorganism was not recognized was represented by "-", the case where it was slightly recognized was represented by "±", and the case where it was recognized was represented by "+". Table 1 shows the results of these evaluations.

[0040]

[Table 1]

From the results shown in Table 1, when the cationic amino acid type surfactant which is an essential component of the present invention shown in Comparative Example 1 was not blended, the antiseptic and fungicidal effect was poor, and the present invention shown in Comparative Example 2 was not obtained. If the amidoamine type surfactant, which is an essential component of the above, is not blended, the antiseptic and antifungal effect is inferior. When the cationic amino acid type surfactant and the amidoamine type surfactant shown in Comparative Example 3 are used in combination and the pH is set to less than 3, the antiseptic and fungicidal effects can be exhibited, but skin irritation occurs. In addition, in Comparative Example 4, if the pH is adjusted to more than 5, the antiseptic and fungicidal effects are not exhibited, and the surfactant of the amidoamine type is not used. The solubility was insufficient, and the product lacked stability. In addition, as shown in Comparative Example 5, the combination use of an amino acid type surfactant and a cationic surfactant (quaternary ammonium salt) provides an antiseptic and fungicidal effect, but causes redness and the like on the skin. As a result, a feeling of tenderness to the skin was not obtained, and the feeling of use was extremely poor.
In Comparative Examples 6 and 7, when the mixing ratio of the amidoamine-type surfactant and the amino acid-type surfactant is out of proportion, a poor antiseptic and fungicidal effect is obtained. In the case of parabens shown in Comparative Example 8, although the antiseptic and fungicidal effect can be obtained, the skin has a tingling sensation and is not gentle to the skin. Was something.

On the other hand, in Examples 1 to 6, in each case, the antiseptic and antifungal effects are sufficiently exhibited, and
The skin had no rough or reddish skin, no tingling or tingling, and was excellent in feeling of use without stickiness or roughness.

[0043]

According to the present invention described above, the antiseptic and antifungal effects are sufficiently exhibited, the skin is not irritated, and the feeling of use does not cause a sticky feeling or a rough feeling. Therefore, it can be used not only for the hands and feet, but also for sensitive parts of the body such as the face and hips.

Further, it can be used not only for the human body but also as a wet wiper for wiping pets and objects.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a form when a wet wiper of the present invention is packaged with a packaging material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Package body 2 Lid material 3 Wet tissue (wet wiper)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) C11D 1/52 C11D 1/52 3/20 3/20 3/33 3/33 17/04 17/04 / / A47L 13/17 A47L 13/17 A (72) Inventor Tomokazu Suda 1531-7 Wadahama Takasuka, Toyohama-cho, Mitoyo-gun, Kagawa Prefecture F-Term in the Technical Center Unicharm Co., Ltd. 4C083 AC102 AC122 AC182 AC271 AC272 AC301 AC311 AC471 AC472 AC532 AC581 AC611 AC612 AC641 AC642 AC661 AC662 AD552 BB06 CC24 DD12 EE06 EE10 EE11 4H003 AC08 AE02 AE05 AE07 AE10 BA19 BA22 DA02 EB04 EB07 EB08 FA03 A02 EB09 FA02 EB09 EB09 EB09 EB09 EB09 EB08 BB09 BC03 BC06 DC10 DD07

Claims (7)

[Claims] A liquid containing an amidoamine type surfactant and a cationic amino acid type surfactant has a pH of 3 to 5
A wet wiper, which is adjusted as described below and impregnated in a base cloth. 2. The wet wiper according to claim 1, wherein the amidoamine type surfactant is diethylaminoethylamide stearate or dimethylaminopropylamide stearate. 3. The method according to claim 1, wherein the cationic amino acid type surfactant is N-coconut fatty acid acyl-L-arginine ethyl.
3. The composition of claim 1, which is DL-pyrrolidone carboxylate.
The described wet wiper. 4. A mass ratio of the amidoamine type surfactant and the amino acid type surfactant of 10: 1 to 1:10.
The wet wiper according to any one of claims 1 to 3, wherein the wet wiper is blended at a ratio of: 5. An organic acid is added to the liquid, and the pH is adjusted to 3
The wet wiper according to any one of claims 1 to 4, wherein the wet wiper is adjusted to 5 or less. 6. The method according to claim 1, wherein the organic acid is salicylic acid, benzoic acid,
The wet wiper according to claim 5, wherein the wet wiper is at least one member selected from sorbic acid, citric acid, glutamic acid, lactic acid, and pyrrolidone carboxylic acid. 7. The wet wiper according to claim 1, wherein the base fabric is a non-woven fabric.