JP2002249423A - Sheet shaped toiletry - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet shaped toiletry that can contain sufficient amount of oil materials and can provide a pleasant feel in use, having good stability as a product. SOLUTION: This sheet shaped toiletry is produced by impregnating a specific amount of O/W type emulsified material consisting of oil material and a surfactant into a support body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-shaped cosmetic which has a sufficient moisturizing effect and a good feel when used.

[0002]

2. Description of the Related Art In recent years,
As a new skin care means, by impregnating the skin with a cosmetic in which a support is impregnated with a composition containing a specific oil component, the performance is easily and effectively improved, and an impregnated sheet for maintaining skin health and beauty is provided. Attention has been focused on cosmetics.

However, in impregnated sheet cosmetics,
There were problems such as the impregnation of the O / W emulsion into the support and the feeling of covering the skin. In particular, when the O / W emulsion contains an oil, there is a problem that a sufficient amount of the oil cannot be impregnated due to the stability on the support and the impregnation efficiency.

[0004] Further, when impregnated with an O / W emulsion containing a sufficient amount of oil, there is a problem of feeling of use such as stickiness caused by oil, and stability of products such as separation of oil. There was a gender problem.

[0005] Various attempts have been made to solve these problems. For example, by holding down the sheet by hand, the agar capsule inside is broken, and the cosmetic lipophilic component moves from the inside of the agar capsule to the sheet (Japanese Patent Laid-Open No. 03-148207). A method of impregnating an aqueous medium with a solubilized liquid has been proposed (Japanese Patent Application Laid-Open No. 01-272512). However, if an attempt is made to blend an oil component that cannot sufficiently apply a lipophilic component and that provides a sufficient effect. There were problems such as a large amount of the activator.

[0006] It has also been proposed to impregnate a support with a W / O emulsion (Japanese Patent Application Laid-Open No. 11-504325). However, although a uniform oil film is formed on the skin and its efficacy is high, it has been proposed. In addition, there was a problem that the feeling of use was oily and sticky, and the feeling of use was inferior.

In view of such circumstances, the inventors of the present invention have conducted intensive studies and have found that the ratio of oil to surfactant is determined by impregnating the O / W emulsion composition with a specific ratio. The present inventors have found that a sheet-like cosmetic having a sufficient effect of oil content and excellent in use feeling can be obtained, and the present invention has been completed.

That is, the present invention provides (1) a sheet-like cosmetic obtained by impregnating a support with an O / W type emulsion in which the ratio of an oil component to a surfactant is 1/1 to 3/1; (2) O
/ W-type emulsion having an oil content of less than 0.1% by mass to less than 20% by mass, and (3) the emulsion has an average particle size of 0.01 μm to 0.1 μm. O / W
It is intended to provide a sheet-like cosmetic obtained by impregnating a support with a type emulsion.

[Detailed Description of the Invention] Hereinafter, embodiments of the present invention will be described in detail. Specific examples of the oil component used in the sheet cosmetic of the present invention include the following.

[0009] For example, avocado oil, olive oil, cacao oil, camellia oil, castor oil, sunflower oil, jojoba oil, kukui nut oil, grape seed oil, sasanqua oil, safflower oil, sweet almond oil, macadamian nut oil, rosehip oil Vegetable fats such as vegetable oils, mink oil, egg yolk oil, etc., waxes such as beeswax, spermaceti, lanolin, carbana wax, candelilla wax, squalane, liquid paraffin, microcrystalline wax, ceresin wax, vaseline etc. Esters such as hydrocarbon, isopropyl myristate, isocetyl isostearate, myristyl myristate, cetyl palmitate, cetyl isooctanoate, isocetyl myristate, octyl dodecyl myristate, 2-ethylhexyl paramethoxycinnamate, 4-t rt- butyl-4'-methoxy - and the like can be exemplified ultraviolet absorbers such as dibenzoylmethane.

The oil component is not particularly limited as long as it is an oil component used as a normal cosmetic as described above.
In particular, squalane is preferable because it can give a moderately moist feeling and is easy to use on the skin.

In the sheet cosmetic of the present invention, the oil content is 0.1% by mass to 20% by mass in the impregnated O / W emulsion.
The content is less than 0.5% by mass, preferably less than 0.5% by mass to 10% by mass, more preferably less than 1% by mass to 5% by mass. Further, 1 part by mass of the support is impregnated with 0.002 parts by mass to 2 parts by mass.

As the surfactant used in the sheet-like cosmetic of the present invention, a surfactant usually used in cosmetics can be used, but from the viewpoint of mildness to the skin,
Nonionic surfactants are preferred.

The types of nonionic surfactants include diglycerin monooleate, diglycerin monostearate, tetraglycerin monooleate, tetraglycerin monostearate, tetraglycerin pentaolate,
Hexaglycerin monolaurate, hexaglycerin monooleate, hexaglycerin monostearate, hexaglycerin tristearate, hexaglycerin pentastearate, decaglycerin monolaurate, decaglycerin monooleate, decaglycerin monostearate, decaglycerin monoiso Polyglycerin fatty acid esters such as stearate, decaglycerin distearate, decaglycerin diisostearate, decaglycerin triolate, decaglycerin pentaisostearate, polyoxyethylene (hereinafter referred to as POE) sorbitan monostearate, POE POE sorbitan fatty acid esters such as sorbitan monooleate, POE sorbitan trioleate, POE sorbit monooleate, POE sorbite Pentaoreto, POE sorbit fatty acid esters such as POE sorbit monostearate, POE glycerin monostearate, POE glycerin monoisostearate, POE glycerin fatty acid esters such as POE glycerin triisostearate, POE monooleate, POE distearate, P
POE fatty acid esters such as OEdiolate, POE
Oleyl ether, POE stearyl ether, POE
Examples include POE alkyl ethers such as behenyl ether, POE2-octyldodecyl ether, POE2-hexyldecyl ether, POE2-decyltetradecylether, and POE cholesteryl ether, and POE hydrogenated castor oil.

Among the above nonionic surfactants, ester nonionic surfactants are preferred from the viewpoint of use on the skin, and particularly, polyglycerin fatty acid esters, POE sorbitan fatty acid esters, and POE sorbite. Fatty acid esters and POE glycerin fatty acid esters are preferred.

In the sheet-like cosmetic of the present invention, the surfactant is contained in the O / W emulsion to be impregnated in an amount of 0.03% by mass.
-20% by mass, preferably 0.1% by mass to less than 10% by mass, more preferably 0.5% by mass to less than 5% by mass. With respect to 1 part by mass of the support, 0.0006 parts by mass to 2 parts by mass is impregnated.

In the sheet-like cosmetic of the present invention, the content of the O / W emulsion to be impregnated is from 30% by mass to less than 99% by mass,
Preferably it contains 40% to less than 98% by weight, more preferably 50% to less than 95% by weight of water. With respect to 1 part by mass of the support, 0.6 to 9.9 parts by mass is impregnated.

As the support used in the sheet-like cosmetic of the present invention, a support generally used as a cosmetic can be used. For example, a support made of natural pulp, rayon, acrylic, nylon, polyurethane, silk, Polyester, polypropylene, polyester-polyethylene, polypropylene-polyethylene and other hydrophobic high-molecular materials, rayon, cotton and other high-water-absorptive high-molecular materials are mixed, but especially contains oil. Cotton, acryl, and nylon are preferred, and rayon is particularly preferred, because the composition can be sufficiently impregnated and the skin feels good.

The above-mentioned support is made by a suitable production method such as an immersion adhesive type, a needle punch type, a spun bond type, a stitch bond type, a melt blown type and a spun lace type. Can be appropriately selected according to the conditions.

In the sheet cosmetic of the present invention, O / W
The amount of the type emulsion impregnated into the support is 2 to 10 times, preferably 5 to 10 times, more preferably 6 to 10 times the amount of 1 part by mass of the support.

In the sheet cosmetic of the present invention, the average particle size of the impregnated O / W emulsion is from 0.01 μm to 0.1 μm.
1 μm. Average particle size is 0.01 μm to 0.1 μm
When an O / W type emulsion is used, a sufficient amount of oil can be emulsified in an aqueous component, and when used as a sheet-like cosmetic after being impregnated into a support, a sticky feeling due to the oil occurs. And a sheet-like cosmetic having a good feel can be obtained.

The O / W emulsion in the sheet-like cosmetic of the present invention is produced by using a mechanical force such as a homomixer, a colloid mill, a homodisper, an ultramixer, a flow jet mixer, an ultrasonic homogenizer, and a high-pressure homogenizer. , Especially when the average particle size is 0.01 μm
In order to industrially produce an ultrafine emulsion having a particle size of 0.1 μm, emulsification by high pressure is preferably performed in multiple stages. According to the above method, the ratio of oil to surfactant is 1
Even under conditions where the amount of surfactant is small, such as / 1/3/1, it is possible to obtain an O / W emulsion having good feel and good stability.

Examples of the impregnation method for impregnating the support with the O / W type emulsion to form a sheet-like cosmetic include a dropping method, a spraying method, a pressure method, and a dipping method.

The O / I impregnated in the sheet cosmetic of the present invention
The viscosity of the W-type emulsion is 1 cp or more from the viewpoint of impregnation of the composition.
1500 cp is preferable, and 50 cp to 1200 cp is more preferable in view of usability such as liquid dripping.

The sheet-like cosmetic of the present invention further includes, for example, humectants, medicinal ingredients, lower alcohols, higher alcohols, and silicones used in conventional cosmetics, as long as the effects of the present invention are not impaired. Oils, thickeners, water-soluble polymers, preservatives, antioxidants, chelating agents, pH adjusters, fragrances, pigments, ultraviolet light scattering agents, vitamins, plant extracts, etc. Can be impregnated.

[0025]

The sheet-like cosmetic of the present invention can contain a sufficient amount of oil, has a good feel when used, and has very good stability as a product. is there.

[0026]

EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples. In the following, “%” means “% by mass”.
Represents

[Examples 1 and 2 and Comparative Examples 1 to 4] Skin cosmetics were prepared by the following production methods using the compositions of Examples 1 to 2 and Comparative Examples 1 to 4 shown in Table 1 below. did. In addition, the methods for measuring the moisturizing effect, the evaluation of usability, the method for measuring the average particle diameter, and the method for testing the storage stability described in Examples 1 and 2 and Comparative Examples 1 to 4 shown in Table 1 below are the following, respectively. Performed by the method. The results are shown in Table 1 below.

[Measurement of Moisturizing Effect] A 10% SDS (sodium dodecyl sulfate) aqueous solution was impregnated with 0.5 ml of 2.5% square gauze on the inner side of the forearm of 5 panelists, stopped with a surgical tape, and left for 15 minutes. Rough skin was prepared. Next, a 2.5 cm square sample was cut into 1
Coated twice a day for 15 minutes, and after 3 days, SKI manufactured by IBS
Impedance was evaluated using CON-200, and a conductance value was obtained. The evaluation results are as follows: the uncoated portion coated with the sample impregnated with purified water alone was used as a control, and the conductance ratio was not changed x, and 1.0 or more to less than 1.5 was Δ,
1.5 or more and less than 3.0 were evaluated as ○, and 3.0 or more as ◎. The evaluation was the average value of five persons.

[Evaluation of feeling of use] A group of 20 panelists was used to cover the face of the sheet-form cosmetic once a day for 15 minutes once a day, and evaluated for one week. The evaluation results were obtained by counting the number of respondents who answered “no stickiness” and “moist”, respectively. × for 8 or less, Δ for 8 to 12 or less, and for 13 or more to 16 or less 、, 17 or more persons were evaluated as ◎.

[Storage Stability Test] After storing the sample in a thermostat at 50 ° C. for one month, if no abnormality is observed by visual evaluation, it is evaluated as “O”. If separation of oil and remarkable change in appearance are observed, ×. Was evaluated.

[Measurement of Average Particle Size] The average particle size was measured using a Microtrac particle size distribution meter (trade name, manufactured by Nikkiso Co., Ltd.).

[Production Method-Example 1] (a) Preparation of O / W Emulsion 20 g of squalane, 10 g of decaglycerin monoisostearate and 10 g of glycerin were heated to 50 ° C. to obtain a uniform non-aqueous emulsion. Prepared. Next, twice the amount of purified water was added to this non-aqueous emulsion, and 400 rpm was applied with a propeller.
, And cooled to room temperature to obtain a pre-emulsion. This was micronized at 100 MPa using a microfluidizer (trade name, manufactured by Microfluidic Corporation), and other components such as a humectant, a polymer, and purified water were added to prepare 1000 g of an O / W emulsion.

(B) Preparation of Sheet Cosmetic 5.5 dtx (decitex) × 40 m as support
A fiber web having a basis weight of 80 g / m ² was prepared using m rayon fibers, and the fibers were entangled by jetting a columnar water stream, followed by drying to obtain a nonwoven fabric. The resulting nonwoven fabric was cut into a face pattern having openings at the eyes, nose and mouth to obtain a sheet. This sheet was impregnated with an O / W emulsion in an amount 7 times the amount of 1 part by mass of the sheet to obtain a sheet-like cosmetic.

[Manufacturing Method-Example 2] Squalane 80
g, 40 g of decaglycerin monoisostearate and 40 g of glycerin were obtained in the same manner as in Example 1 to obtain a sheet-like cosmetic.

[Production Method-Comparative Example 1] 5 g of squalane,
Except for using 10 g of decaglycerin monoisostearate and 10 g of glycerin, a production method similar to that of Example 1 was used.
A sheet cosmetic was obtained.

[Production Method-Comparative Example 2] Squalane 20
g, 40 g of decaglycerin monoisostearate and 10 g of glycerin were obtained in the same manner as in Example 1 to obtain a sheet-like cosmetic.

[Production Method-Comparative Example 3] Squalane 20
g, 3 g of decaglycerin monoisostearate and 10 g of glycerin were obtained in the same manner as in Example 1 to obtain a sheet-like cosmetic.

[Production Method-Comparative Example 4] Squalane 80
g, 10 g of decaglycerin monoisostearate and 10 g of glycerin were obtained in the same manner as in Example 1 to obtain a sheet-like cosmetic.

[0039]

[Table 1]

From the results shown in Table 1, it can be seen that the sheet-like cosmetic obtained by impregnating a support with an O / W type emulsion in which the ratio of oil to surfactant is 1/1 to 3/1 is O / W The average particle size of the emulsion was 0.01 μm to 0.1 μm, and it was found to be a sheet-like cosmetic having an excellent moisturizing effect and a good feeling of use such as moist feeling and non-stickiness. The sheet cosmetic of Comparative Example 1 in which the ratio of the oil component to the surfactant was 0.5 / 1 had an average particle size of the O / W emulsion of 0.05 μm.
m, but the content of oil was small, the desired moisturizing effect could not be obtained, and the sheet of Comparative Example 3 in which the ratio of oil to surfactant was 2 / 0.25 Although the cosmetic in use had a good feeling in use, the average particle size of the O / W emulsion was coarse and the storage stability was poor.

Examples 3 to 7 Sheet-like cosmetics were prepared by the following production methods.

[Manufacturing Method-Example 3] (a) Preparation of O / W Emulsion Natural oil E, which is a lipophilic component among oils, activators, glycerin, and other components, was heated to 70 ° C. Dissolve,
Twice the amount of purified water was added to the oil phase, mixed and stirred at 400 rpm with a propeller, and cooled to room temperature to obtain a preliminary emulsion. This is a microfluidizer (trade name)
Microfluidic Co., Ltd.), pulverized at 100 MPa, and added with hydrophilic components such as humectants, polymers, preservatives, etc., and purified water.
A W-type emulsion was prepared.

(B) Preparation of Sheet Cosmetic A material cut in a face pattern having openings at the eyes, nose and mouth of the support obtained by the method and the materials described in Table 2 was prepared. did. An O / W emulsion is added to this sheet as sheet 1.
The sheet-shaped cosmetic was obtained by impregnating 7 parts by mass with respect to the mass part.

[0044]

[Table 2]

[Production Method-Example 4] Among the oil, activator, glycerin, and other components, lipophilic components such as behenyl alcohol, dimethylpolysiloxane, stearyl glycyrrhetinate, and propyl paraoxybenzoate were heated to 80 ° C. After cooling to 60 ° C., 4 times the amount of purified water was added to the oil phase, mixed and stirred at 6000 rpm with a homomixer, and cooled to room temperature to obtain a preliminary emulsion. This is a microfluidizer (trade name)
After micronizing the particles at 120 MPa using a microfluidic disk, an O / W emulsion was prepared by adding a humectant, other hydrophilic components such as a polymer, and purified water. This O / W type emulsion was cut from a material described in Table 3 and a support obtained by the production method into a face mold having openings in the eyes, nose and mouth with respect to 1 part by mass of a sheet. A sheet cosmetic was obtained by impregnating 10 times the amount.

[0046]

[Table 3]

[Production Method-Example 5]
After dissolving by heating to 0 ° C. and cooling to 60 ° C., twice the amount of purified water was added to the oil phase, and the mixture was homogenized by a homomixer.
The mixture was stirred at 000 rpm and cooled to room temperature to obtain a pre-emulsion. This was micronized at 110 MPa using a microfluidizer (trade name, manufactured by Microfluidic Corporation), and then a humectant, other hydrophilic components such as a polymer, and purified water were added to prepare an O / W emulsion. . The O / W emulsion was cut from a material described in Table 4 and a support obtained by the manufacturing method into a face mold having openings in the eyes, nose and mouth, and 1 part by mass of a sheet. It was impregnated 7 times to obtain a sheet-like cosmetic.

[0048]

[Table 4]

[Production Method-Example 6] Among oil components, activators and other components, lipophilic propyl paraoxybenzoate was heated to 80 ° C. to dissolve it, cooled to 60 ° C. A double volume of purified water was added to the phase, mixed and stirred with a homomixer at 6000 rpm, and cooled to room temperature to obtain a pre-emulsion. Using a microfluidizer (trade name, manufactured by Microfluidic),
After micronization at 100 MPa, an O / W emulsion was prepared by adding a humectant, other hydrophilic components such as a polymer, and purified water. This O / W type emulsion was cut from a material described in Table 5 and a support obtained by the manufacturing method into a face mold having openings in the eyes, nose and mouth, and 1 part by mass of a sheet. A sheet cosmetic was obtained by impregnating 10 times the amount.

[0050]

[Table 5]

[Production Method-Example 7] Among the oil, activator and other components, lipophilic components such as cetostearyl alcohol, dimethylpolysiloxane, and stearyl glycyrrhetinate were heated to 80 ° C. and dissolved. Then, 3 times the amount of purified water was added to the oil phase, mixed and stirred at 6000 rpm with a homomixer, and cooled to room temperature to obtain a preliminary emulsion. Using a microfluidizer (trade name, manufactured by Microfluidic),
After pulverization at 120 MPa, an O / W emulsion was prepared by adding a humectant, other hydrophilic components such as a polymer, and purified water. The O / W type emulsion was cut from a material described in Table 6 and a support obtained by the manufacturing method into a face mold having openings in the eyes, nose, and mouth with respect to 1 part by mass of a sheet. To obtain a sheet-shaped cosmetic.

[0052]

[Table 6]

The sheet cosmetics of Examples 3 to 7 were
Both can contain a sufficient amount of oil, have excellent moisturizing effects, and have a good feel during use,
Furthermore the stability of a product is also very good.

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Claims (3)

[Claims] 2. The method according to claim 1, wherein the ratio of the oil component to the surfactant is 1/1 to 3
Sheet-like cosmetic obtained by impregnating a support with an O / W-type emulsion comprising 2. The oil content of the O / W emulsion is 0.
The sheet-shaped cosmetic according to claim 1, which is present in an amount of 1% by mass to less than 20% by mass. 3. The emulsion has an average particle size of 0.01 μm or more.
The sheet-like cosmetic according to claim 1 or 2, wherein the support is impregnated with an O / W emulsion having a particle size of 0.1 µm.