JP2000256164A - Sheet cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a sheet cosmetic efficiently leaving powder on cleaned skin and giving comfortable feeling by supporting a powder having a surface energy lower than a specific level and an aqueous medium on a sheet substrate. SOLUTION: A powder having a surface energy of <=70 mN/m, preferably <=60 mN/m, more preferably <=40 mN/m (e.g. powder of a polymer having organic silicone group such as polymer bead S and silicone resin) is supported together with an aqueous medium on a sheet substrate (nonwoven fabric or woven fabric of natural or synthetic fiber such as pulp or cotton). Preferably, the cosmetic is further incorporated with 1/100 to 10 times weight of a silicone oil having a viscosity of 1-200 mm2/s at 25 deg.C [e.g. (di)methylpolysiloxane] based on the weight of the powder. The sheet cosmetic is preferably produced by applying or impregnating a liquid composition containing the above powder and aqueous medium to the sheet substrate to support the powder and the aqueous medium on the substrate, cutting the product and laminating the cut sheets.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-like cosmetic which can be used for body wiping and shaving, and a method for producing the same.

[0002]

2. Description of the Related Art
Various wet sheet type products used for wiping or shaving the body such as face, neck, limbs, etc. have been put to practical use. These include products individually packaged one by one, products of a pocket tissue type in units of several tens, and products of a box type packaged in units of several tens to several hundreds. These products are impregnated with cleaning ingredients, refreshing ingredients, bactericides, fragrances, etc., and are used to cleanse the skin after use, give a refreshing feeling, and replenish moisture for shaving. I have.

[0003] However, conventional products, although effective for the purpose of cleansing and moisturizing the skin, wipe off oil and moisture on the skin more than necessary, giving a feeling of dryness and discomfort. There were many things. Further, they are used only for wiping relatively dirty portions such as hands and feet and are not suitable for wiping the whole body on a daily basis.

[0004]

Means for Solving the Problems The present inventors include a powder having a surface energy of 70 mN / m or less together with an aqueous medium in a sheet-like substrate made of a nonwoven fabric or a woven fabric, so that the surface of the substrate becomes The present inventors have found that the powder is present, the powder is efficiently transferred to the skin after wiping, and gives a comfortable feeling of use, and the present invention has been completed. That is, the present invention provides a sheet cosmetic in which a powder having a surface energy of 70 mN / m or less and an aqueous medium are supported on a sheet substrate.

Further, according to the present invention, the surface energy is 70 m.
A liquid composition containing a powder of N / m or less and an aqueous medium is applied or impregnated to a sheet-like substrate, and after supporting the powder and the aqueous medium, cutting and laminating. The present invention provides a method for producing a laminated sheet-like cosmetic.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The sheet-like cosmetic of the present invention is obtained by dispersing at least one kind of powder having a surface energy of 70 mN / m or less in an aqueous medium such as water or hydrous ethanol, and spraying and applying the dispersion on a substrate. Can be prepared. Such a powder having a small surface energy, when applied to the skin, reduces the coefficient of kinetic friction of the skin and gives a smooth sliding feeling. The surface energy of the powder is 70 mN / m or less, more preferably 60 mN / m or less, and particularly preferably 40 mN / m or less, from the viewpoint of adhesion to skin and sustainability. Further, the surface energy is preferably in this range also from the viewpoint of the transpiration of skin moisture due to the water repellency of the powder. The method for measuring the surface energy in the present invention is as follows.

<Method of Measuring Surface Energy of Solid> The surface tension γ is considered to be the sum of a term (γ ^d ) caused by London's dispersion force and a term (γ ^p ) caused by other polar forces. γ = γ ^d + γ ^p (1) Also, by measuring the contact angles of two liquids (distilled water and methylene iodide) for which γ ^d and γ ^p are known, γ ^d and γ ^p Is obtained by calculation. (b ₁ + C ₁ + a ₁ ) γ ^d γ ^p + c ₁ (b ₁ -a ₁ ) γ ^d + b ₁ (c ₁ -a ₁ ) γ ^p −a ₁ b ₁ c ₁ = 0… (2) (b ₂ + C ₂ + a ₂ ) γ ^d γ ^p + c ₂ (b ₂ -a ₂ ) γ ^d + b ₂ (c ₂ -a ₂ ) γ ^p −a ₂ b ₂ c ₂ = 0… (3) a ₁ = (1/4) γ ₁ (1 + cos θ ₁ ) a ₂ = (1/4) γ ₂ (1 + cos θ ₂ ) b ₁ = γ ₁ ^db ₂ = γ ₂ ^d c ₁ = γ ₁ ^p c ₂ = γ ₂ ^p θ ₁ ; Contact angle of distilled water on solid surface θ ₂ ; Contact angle of methylene iodide on solid surface ・ Surface tension of distilled water γ ₁ = 72.8 dyne / cm γ ₁ ^d = 22.1 dyne / Cm γ ₁ ^p = 50.7 dyne / cm ・ Surface tension of methylene iodide γ ₂ = 50.8 dyne / cm γ ₂ ^d = 44.1 dyne / cm γ ₂ ^p = 6.7 dyne / cm Solid from formulas (2) and (3) Force component of surface tension (γ ^d )
And the polar force component (γ ^p ) are calculated and substituted into the equation (1) to calculate the surface tension of the solid, that is, the surface energy.

Examples of powders that can be used in the present invention include silicone resins (KMP-590 manufactured by Shin-Etsu Chemical Co., Ltd .; Tospearl 145 and Tospearl 20 manufactured by Toshiba Silicone Co., Ltd.).
00B etc.), polyorganosilsesquioxane, silicone rubber powder (KMP-597 manufactured by Shin-Etsu Chemical Co., Ltd.)
KMP-598, X-52-875, Toray Co., Ltd. Trefill 501, Trefill 505, Trefill 506,
Trefil 601 etc.), silicone resin / rubber composite powder (X-52-1139K, X-5 manufactured by Shin-Etsu Chemical Co., Ltd.)
2-1139G) and polymer fine particles (hereinafter referred to as polymer beads S) obtained by performing dispersion polymerization of a vinyl monomer in a solvent using a polysiloxane compound having a radical polymerizable group at one end as a dispersant. The organic silicone group-containing polymer of the above. Synthetic silica beads, hydrophobic silica powder (Shin-Etsu Chemical Co., Ltd.)
KMP-110, KMP-105, etc.), nylon resin (SP-500, etc., manufactured by Toray Industries), polystyrene resin (Fine Pearl, manufactured by Sumitomo Chemical Co., Ltd., Techpolymer SB manufactured by Sekisui Plastics Co., Ltd.) , Fine powder SGP manufactured by Soken Chemical Co., Ltd.), polyethylene resin (flow beads manufactured by Sumitomo Seika Co., Ltd.), polymethyl methacrylate resin (Matsumoto Microsphere M manufactured by Matsumoto Yushi Seiyaku Co., Ltd. Seikagaku Kogyo Co., Ltd. Techpolymer MB, Soken Chemical Co., Ltd. Fine Powder MP, etc.), divinylbenzene resin, polyurethane resin, benzoguanamine resin, melamine resin, phenol resin, fluorine resin, etc. Gendimethylpolysiloxane,
Surface-repellent powder with a compound containing silicon or fluorine, such as perfluoroalkyl phosphate diethanolamine salt (SI-TALC JA4 manufactured by Miyoshi Kasei Co., Ltd.)
6R, PF-3LL-5 talc manufactured by Daito Kasei Kogyo Co., Ltd.)
Is mentioned. Among them, the above-mentioned polymer beads S and organic silicone group-containing polymers such as silicone resin are preferred in terms of reduction in dynamic friction when the skin remains, persistence on the skin, and imparting a slippery feel to the skin.

In the present invention, the shape of the powder is preferably spherical. As the sphericity of the powder increases, the coefficient of kinetic friction decreases and the feeling of skin slip increases. In the present invention, those having a sphericity of 70 or more measured as described below are preferable in terms of usability, and those having a sphericity of 90 or more are particularly preferable. <Sphericity> An electron micrograph of the solid particles was taken with a scanning electron microscope, and the particles were not overlapped.
0 are randomly selected and the projected image of the particle is a perfect circle,
Alternatively, draw the circumscribed circle of the projected image, and
The sphericity of a particle is defined as the number of concentric circles having a radius of% and a circumscribed circle having a shape including the entire contour of the projected image.

[0010] The particle size of the powder of the present invention is set to 0.1.
It is preferable that 60% by weight or more of the entire powder is present in the range of 5 to 30 μm in order to enhance skin feel.
It is particularly preferred that the μm powder is at least 80% by weight of the total powder. Powders having a particle size of less than 0.5 μm have little effect on the feel of the skin or give less discomfort such as creaking, and are therefore preferably smaller, and powders having a particle size of more than 30 μm are less likely to be mixed. Is better. Therefore, the amount of these powders is preferably less than 40% by weight of the total powder, more preferably 10% by weight or less. Further, from the viewpoint of skin feel, it is desirable that powder having a particle size of 200 μm or more is not substantially contained.

The sheet-like cosmetic of the present invention may contain 0.1 to 20 g, particularly 0.5 to 10 g, of the powder having a particle size of 0.5 to 30 μm per square meter of the substrate. It is preferable in that it gives a feeling to the skin and does not whiten the skin.

Further, a powder made of a natural mineral may be used in combination. Specifically, talc, sericite, mica, kaolin, red iron oxide, clay, bentonite, silicic acid, silicic anhydride, magnesium silicate, mica, magnesium oxide,
Zinc oxide, titanium oxide, aluminum oxide, aluminum sulfate, alum, calcium sulfate, barium sulfate,
Examples include magnesium sulfate.

The impregnation ratio of the aqueous medium containing the powder is preferably 50 to 500% by weight, more preferably 100 to 500% by weight based on the weight of the substrate.
400% by weight is preferable for enhancing the usability.

In the present invention, either a non-woven fabric or a woven fabric of natural fibers or synthetic fibers can be used as the sheet-like substrate. Specifically, for example, rayon, acetate,
Non-woven fabrics or woven fabrics of acrylic, polyester, polyethylene, polypropylene, polyurethane, polyamide, cotton, and cotton blends thereof, as well as wet and dry pulp sheets, pulp sheets reinforced with thermoplastic resins (polyethylene, polypropylene, polyethylene terephthalate, etc.) No. These substrates are preferable because the powder is gathered on the sheet surface as the fiber spacing is as close as possible. In addition, pulp and cotton are particularly preferable as the base material because of ease of processing at the time of manufacturing. For pulp,
It is preferable to use thin pulp on top of each other in order to achieve both softness and strength. Further, pulp reinforced with a thermoplastic resin can be given an appropriate thickness (bulk) by embossing and does not wet the skin too much. preferable. Further, by partially laminating a plurality of sheets by heat sealing, it is possible to provide a soft, wiping, thick sheet having a good feeling of use.

The sheet-like cosmetic of the present invention has a viscosity of 1 to 200 mm ² / s at 25 ° C. in order to further enhance the feel.
Of silicone oil. Silicone oil has a property of being highly adsorbable to the skin, but has a favorable effect in further increasing the adsorption of the powder to the skin.
Examples of the silicone oil include methyl polysiloxane, dimethyl polysiloxane, diethyl polysiloxane, methyl phenyl polysiloxane, fatty acid-modified polysiloxane, higher alcohol-modified polysiloxane, and amino-modified polysiloxane. Of these, methyl polysiloxane and dimethyl polysiloxane are particularly preferred. Also,
If the viscosity is less than 1 mm ² / s, there is a problem of skin irritation and the like, so that the compounding is not preferred. The compounding amount of the silicone oil is preferably 1/100 to 10 times, more preferably 1/50 to 1 times the amount of the powder of the present invention.

Oily substances that can be blended besides silicone oil include avocado oil, camellia oil, turtle oil, corn oil, olive oil, wheat germ oil, soybean oil, jojoba oil, peanut oil, and cacao in order to enhance the feeling of use. Fats, lanolin, liquid paraffin, squalane, petrolatum, cholesteryl esters and the like are preferred.

The sheet cosmetic of the present invention may further contain alcohols such as ethanol, propylene glycol, 1,3-butanediol, glycerin, sorbitol and polyethylene glycol.

Further, a fungicide,
Antiperspirants, cooling agents, humectants, anti-inflammatory agents, whitening agents, UV care agents, fragrances, and the like can also be included. These components are:
In general, lipophilic substances are abundant and exert their effects by being absorbed into the skin. Of the powders used in the present invention, if the surface energy is small, that is, if a powder having high lipophilicity is used, these active ingredients are adsorbed on the powder, and the powder is adsorbed on the skin and remains. The persistence of the active ingredient and the persistence of the effect are enhanced.

The sheet-like cosmetic of the present invention removes dirt by wiping the skin to clean the skin, and the powder is effectively adsorbed on the skin and remains, so that the skin feels dry for a long time. Can be given. Therefore, it is suitable as a sheet for wiping the body or the like.

For example, when used on the face, it not only removes sebum effectively but also keeps powder and moisturizer to keep it comfortable, and also significantly improves the ease of makeup redress. In addition, when an antiperspirant and a bactericide are blended, these active ingredients are allowed to remain on the skin for a long time after cleansing the skin, so that a continuous antiperspirant / deodorant effect can be expected. In addition, the product of the present invention is highly useful even in a method of using it on a waste hair treatment site of a body to prepare the skin after shaving. In other words, by applying to the skin before use of the razor, the portion is moistened and the powder is left, so that the razor can be slid smoothly and the skin is not hurt and can be finished with a comfortable skin feel.

The sheet-like cosmetic of the present invention comprises:
It is preferable that most of the material is supported unevenly near the surface of the substrate. In order to unevenly distribute the powder, a method of sprinkling the powder directly on the sheet or applying a liquid containing the powder may be used. Moreover, it is preferable that the sheet-shaped cosmetic of the present invention carries the powder in a state where the powder can be transferred to the skin by sliding.

The sheet-shaped cosmetic of the present invention can be prepared by spraying an aqueous medium containing the powder of the present invention and other components with a spray or an air gun, or by using a slit type nozzle or a bar coater. It can be prepared by supporting on a substrate by the method described in the above. In particular, as a method for obtaining a laminated sheet-like cosmetic, a liquid composition containing a powder having a surface energy of 70 mN / m or less and water is applied to a sheet-like substrate or impregnated with the powder. A production method comprising supporting the body and the liquid composition, cutting, and laminating is preferred. According to this method, a product in which the powder is uniformly distributed and the effect of the present invention is sufficiently exhibited can be obtained.

Using the sheet cosmetic of the present invention, a face,
By wiping the skin of the body such as the neck, limbs, etc., the powder of the present invention sufficiently remains on the skin to reduce the kinetic friction resistance, for example, it can be reduced to 90% or less of the kinetic friction resistance of the skin before use. Can clearly feel the smooth skin feel.

[0024]

Examples 1 to 9 and Comparative Example 1 With respect to the sheet materials shown in Table 1, the impregnation ratio was set, and a predetermined amount of the impregnated water-containing liquid agent was sprayed on the sheet with a spray to cause the powder to be carried on the sheet. After that, it was cut and laminated to prepare a wet type sheet cosmetic. The aqueous solution for impregnation was prepared by mixing raw material components in the amounts shown in Table 1 using a homomixer.

The number in parentheses of each powder in the table indicates the surface energy and the particle size in this order, and the particle size indicates the average particle size (the same applies to the following examples). Further, among the raw material components shown in Table 1, the polymer beads S were synthesized by the following method. <Synthesis example of polymer beads S> n-hexane 276.9
g, toluene 90 g, a polysiloxane compound having a methacryloxy group at one end (Silaplane FM-0725 (registered trademark) manufactured by Chisso Corporation, number average molecular weight 10,000)
1.58 g was charged into a reaction vessel under a nitrogen atmosphere.
The temperature was raised to ° C. 39.50 g of methyl methacrylate, 13.17 g of styrene, 1.06 g of lauroyl peroxide
Was added and reacted at 70 ° C. for 12 hours. After allowing the reaction solution to cool,
The mixture was diluted with 200 g of n-hexane and separated into solid and liquid by centrifugation. After redispersing the residue with 300 g of n-hexane,
The washing step of centrifugation was performed twice, and vacuum drying was performed with a dryer at 50 ° C. to obtain 54.0 g of a white powder. The obtained polymer beads S were monodisperse particles having a particle size of 2 μm.

<Evaluation of Feeling of Use> Using the sheet-like cosmetic obtained above, five men and women aged 20 to 40 were wiped off the skin of their arms and neck, and the following evaluation items were rated as follows. Was used to evaluate the usability. Table 1 shows the evaluation results by the average score of 10 persons. <Evaluation items and scores> Smoothness at the time of use 2: Slightly slick 1: Slightly slick 0: Not slick Smooth at the time of use 2: No rough skin 1: Slightly rough skin 0: Slight rough skin Powder for skin Adhesion (white residue at the time of use) 2: Does not remain white 1: remains slightly white 0: remains white Smoothness persists 2: persists 1: slightly persists 0: does not persist

[0027]

[Table 1]

From Table 1, it can be seen that the sheet-like cosmetics of Examples 1 to 9 are more excellent in use feeling than the sheet-like cosmetics of Comparative Example 1,
That is, a smooth feeling was realized, the skin was not rough, the skin did not look white due to the powder, and a comfortable touch was maintained.

[0029]

EFFECT OF THE INVENTION The use of the sheet cosmetic of the present invention not only cleans sweaty skin and dirt-stained skin, but also provides a smooth and slippery feeling to the skin after use, thus improving the wetness. A new comfortable feeling that is not available in the seat can be given.

Continuation of the front page F term (reference) 4C083 AB432 AB442 AC102 AC122 AC482 AD022 AD072 AD092 AD151 AD152 AD272 BB21 CC01 CC24 DD12 EE06 FF01

Claims (4)

[Claims] 1. A sheet-like cosmetic comprising a sheet-like substrate carrying a powder having a surface energy of 70 mN / m or less and an aqueous medium. 2. The sheet cosmetic according to claim 1, wherein the powder comprises an organic silicone group-containing polymer. 3. The sheet-shaped cosmetic according to claim 1, wherein the silicone oil having a viscosity of 1 to 200 mm ² / s at 25 ° C. is contained in an amount of 1/100 to 10 times the weight of the powder. 4. After a liquid composition containing a powder having a surface energy of 70 mN / m or less and an aqueous medium is coated or impregnated on a sheet-like substrate, and the powder and the aqueous medium are supported. And a method for producing a laminated sheet-like cosmetic comprising cutting and laminating.