JP4001858B2 - Sheet cleansing material - Google Patents

Description

  The present invention is a sheet that can sufficiently remove both aqueous makeup cosmetics and oily makeup cosmetics easily and quickly, is excellent in use feeling, and can stably maintain quality even in a product form in which sheets are laminated. Related to cleansing materials.

  Makeup cosmetics are required to have excellent adhesion to the skin, high water resistance and sebum resistance, resistance to makeup collapse, and good makeup persistence. In particular, in the case of mascara, which is a type of eye makeup cosmetic, in order to prevent makeup collapse against sweat and water, it can be made into an oily mascara using a solid wax or a polymer for film formation, etc. An aqueous mascara is made using a water-soluble polymer having a film-forming ability.

  On the other hand, it is also required that makeup cosmetics can be removed efficiently, and various cleansing materials are used for that purpose. As a general technique for removing makeup, it is known to use an aqueous surfactant solution or use an oil agent in the form of gel, cream or oil. However, conventional water-based cleansing compositions can remove water-based mascara that is soluble and dispersible in water more quickly, but cannot remove oil-based mascara, and oil-based cleansing compositions can remove oil-based mascara. There was a problem that mascara could not be removed. Further, when the surfactant aqueous solution and the oil agent are allowed to coexist, the oil agent is emulsified by the surfactant, and the oil agent cannot effectively act on the oily makeup stain.

  Furthermore, a two-phase cleansing composition that separates into an oil phase and an aqueous phase has been proposed for the purpose of removing both oily mascara and aqueous mascara. In this type of cleansing composition, the oil phase is responsible for the removal of the oily mascara and the aqueous phase is responsible for the removal of the aqueous mascara. However, when using it, it is necessary to shake it vigorously by hand, temporarily make it an apparently homogeneous dispersion, soak it in cotton or tissue, and then wipe it off. It was also difficult to adjust the amount used.

  Furthermore, a cleansing material in which a sheet-like support is impregnated with a cleansing composition has also been proposed in order to remove makeup easily and quickly. However, when a sheet in which a sheet-like support is impregnated with a two-phase cleansing composition is laminated, the oil phase and the aqueous phase of the two-phase cleansing composition are easily separated inside the sheet-like laminate. The composition of the impregnating liquid may be different between the upper part and the lower part of the sheet. In addition, during storage of the sheet laminate, the impregnated liquid may move to the lower layer due to gravity, and the impregnation rate may be greatly different between the upper and lower portions of the laminate. As a result of such changes in the composition of the impregnating liquid and the impregnation ratio, the cleansing performance is different between the upper part and the lower part of the laminated sheets, and as a result, there is a tendency that the cleaning effect cannot be stably obtained.

  Patent Document 1 discloses a cleansing material obtained by impregnating a sheet with an emulsion cosmetic having a viscosity of 200 to 4000 mPa · s. However, since this emulsion cosmetic is premised on stable emulsification using a surfactant (stable at 50 ° C. for one month), in the case of an oil-in-water type, the oil agent is hardly released and the cleansing performance is insufficient. In the case of the middle water type, there was a problem that the oiliness became stronger. This is because there is no problem with the composition change inside the sheet because the emulsification is stable, but depending on the conditions of the sheet, when the sheets are laminated, the impregnation liquid moves to the lower layer by gravity during storage, There is a problem that the impregnation rate greatly changes between the laminated upper and lower sheets, so that the feeling of use and cleansing performance change, and the quality cannot be stably maintained.

On the other hand, it is known that low-boiling oils such as low-boiling isoparaffins have a detergency against makeup stains, and various cleansing materials using these are disclosed.
Patent Document 2 discloses an eye makeup remover obtained by emulsifying a low-boiling isoparaffinic hydrocarbon having a boiling point of 160 to 280 ° C. in water with a polyoxyethylene alkyl ether surfactant. However, since this is stably emulsified using a surfactant, the oil agent is hardly released and the cleansing performance is poor. Moreover, in order to provide a certain amount of cleansing performance, the amount of the oil agent tends to increase, resulting in an oily feel. Further, the document does not disclose conditions for stably maintaining quality in a sheet impregnated with an oil-in-water emulsion composition or a product form in which the sheet is laminated.

  Further, as a low-boiling oil agent and not using a so-called surfactant, Patent Document 3 discloses a makeup remover in which low-boiling isoparaffin or low-boiling silicone oil is dispersed in an aqueous phase with a polyacrylic thickener. Is disclosed. Furthermore, Patent Document 4 discloses a makeup remover containing water-soluble polysaccharides, low-boiling oils and water as essential components. However, these do not disclose anything about using an oil-in-water emulsion composition as a sheet preparation.

  Patent Document 5 discloses an oil-in-water emulsion composition containing an acrylic acid / alkyl acrylate copolymer emulsifier, an oil agent, water, and a non-emulsifying surfactant, and the form of this composition is cotton balls, cotton. It is disclosed that it may be in the form of being wiped off by using a tool such as a pad, tissue paper or towel. However, this oil-in-water emulsion is premised on a stable product using an emulsifier (stable at 40 ° C. for 3 months), and in a product form in which sheets impregnated with an oil-in-water emulsion composition are laminated, the quality can be stably improved. The conditions to be maintained are not disclosed.

  Furthermore, Patent Document 6 discloses a multilayer cleansing material that contains a low viscosity oil such as isoparaffin and becomes a water-in-oil emulsion when shaken. However, this is a method of wiping by applying to the skin what has been shaken to form an emulsion, and there is a problem that the quality fluctuation during use is large, such as the amount used and composition are not constant.

  In this way, in the conventional technology, cleansing performance becomes insufficient when oil agents such as low-boiling isoparaffins are stably emulsified, and when prioritizing cleansing performance, it becomes a two-phase type or a blended form with a strong oily feeling. Was the current situation. In addition, the cleansing composition impregnated into the sheet-like support is a two-phase type, since it is easy to phase-separate and the quality cannot be maintained, and is basically premised on an emulsified form in which the oil agent is stably blended. Cleansing performance was insufficient. In addition, in a product form in which sheets impregnated with an oil-in-water emulsion composition are laminated, conditions for stably maintaining quality have not been known.

JP 2001-302450 A JP-A-5-163116 JP-A-62-135406 Japanese Patent Laid-Open No. 9-110638 Japanese National Patent Publication No. 11-503461 JP-A-8-99836

  The present invention can easily and quickly remove both water-based makeup cosmetics and oil-based makeup cosmetics sufficiently, is excellent in cleansing performance and feeling of use, and has a stable quality even in a product form in which sheets are laminated. It is providing the sheet-like cleansing material which can be maintained.

  When the present inventors combine a relatively high density hydrophilic sheet material and an oil-in-water emulsion composition using an aqueous thickener, the composition change of the emulsion composition in the sheet material is suppressed, It was also found that a sheet-like cleansing material with good quality stability in which the vertical movement of the impregnating liquid was suppressed between the laminated sheets was obtained. In particular, when an oil agent such as isoparaffin having a high detergency is used as the oil agent, the cleansing performance is high and the oil has a good feeling of use with no strong oily feeling.

  Here, the quality of the laminated sheets can be maintained stably in the form of 40 sheets stacked by Z-folding, after impregnation on the second sheet and the 39th sheet from the top after storage for one month at 50 ° C. This means that the change in rate is within ± 40% of the initially set impregnation rate, and that the cleansing performance for oily mascara, which is the most difficult to remove among cosmetics, is maintained in each sheet. To do. Specifically, the cleansing performance of the second sheet and the 39th sheet from the top by the following method is 方法 or ◯ according to the following evaluation criteria.

<Evaluation method of cleansing performance>
0.0045 g of oily mascara is uniformly applied to a circular shape having a diameter of 1.2 cm on a slide glass and left to dry for a certain period of time. The sheet-type cleansing material is applied to the dried mascara, and the operation of wiping is performed after first pressing for 5 seconds at a constant pressure of 100 g / cm ² , and the number of times of wiping necessary to remove the mascara is measured.
[Evaluation criteria]
◎: 5 times or less ○: 6-10 times: 11-15 times ×: 16 times or more

That is, the present invention comprises a non-woven fabric (A) having a cellulose content of 70% by mass or more and a density of 0.15 to 0.3 g / cm ³ , and an aqueous thickener 0.01 to 0.5 mass. %, An oil agent having a boiling point of 160 to 300 ° C., 5 to 30% by mass, and water, and when left at 30 ° C., the aqueous phase and other emulsified phases are added within one day to one month. The present invention provides a sheet-type cleansing material impregnated with an oil-in-water emulsion composition (B) that is a composition to be separated .

  The cleansing material of the present invention can easily and quickly remove both aqueous makeup cosmetics such as aqueous mascara and oily makeup cosmetics such as oily mascara, and has excellent cleansing performance and usability, and has a sheet. Quality can be stably maintained even in stacked product forms.

  In the present invention, a low boiling point oil agent having a high detergency and not having a strong oily feeling is emulsified and dispersed using an aqueous thickener, and combined with a relatively high density hydrophilic nonwoven fabric. A relatively high density hydrophilic non-woven fabric, which is a sheet material, stably holds the aqueous phase of the outer phase of the emulsified composition, and a polymer aqueous thickener containing oil is entangled between the fibers in the non-woven fabric. By holding oil stably, the movement of the emulsion composition in the nonwoven fabric can be suppressed, and the amount and composition of the emulsion composition in the nonwoven fabric are maintained. Since the emulsified composition is emulsified and dispersed to such an extent that the oil agent does not impair the detergency, the cleansing material of the present invention is easy to release the oil agent and has high detergency, and the liquid oozes from the sheet material. The feeling of use is excellent. Furthermore, the quality can be stably maintained even when the sheets are laminated. Further, since the cleansing material of the present invention is in the form of a sheet, it can be used immediately after being removed, and can be removed simply by wiping off the makeup, so that makeup can be removed easily and quickly.

The nonwoven fabric (A) used in the present invention is composed of fibers having a cellulose content of 70% by mass or more, and has a density of 0.15 to 0.3 g / cm ³ .

  In order to suppress the movement of the oil-in-water emulsified composition (B) to be impregnated in the sheet material, the nonwoven fabric (A) that is the sheet material is hydrophilic so that the aqueous phase that is the outer phase can be stably maintained. It is preferable. When the oil agent in the oil-in-water emulsion composition penetrates into the nonwoven fabric fiber due to impregnation, the wettability of the nonwoven fabric with respect to the aqueous component decreases, and when the hydrophobic fiber is mixed, the wettability with respect to the aqueous component of the nonwoven fabric itself decreases. Therefore, the nonwoven fabric (A) is made of fibers having a cellulose content of 70% by mass or more. From the viewpoint of stably maintaining the aqueous phase of the outer phase, the cellulose content is more preferably 80% by mass or more.

  Specific examples of cellulose fibers include cotton and rayon. In particular, cotton is preferable because it has a smooth touch. The nonwoven fabric is preferably obtained by hydroentanglement from the viewpoint of skin feel.

If it is a range satisfying the above, mixing of hydrophobic fibers may be performed for the modification of the sheet. Examples of the hydrophobic fibers include polyester fibers such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polypropylene (PP), and polyethylene (PE), and polyolefin fibers .

In order to hold the oil-in-water emulsified composition (B) to be impregnated and suppress movement in the sheet material, the nonwoven fabric (A) is preferably relatively dense. From the point that the liquid does not easily move to the lower sheet due to gravity, the density of the non-woven fabric is 0.15 g / cm ³ or more. On the other hand, the impregnating liquid easily permeates into the sheet and softens the feeling of use of the sheet. 0.3 g / cm ³ or less. The density of the nonwoven fabric is particularly preferably 0.17 to 0.25 g / cm ³ from the balance of liquid movement suppression and feeling of use.

Further, the average basis weight (weight per unit area) of the nonwoven fabric (A) is preferably 40 g / m ² or more from the viewpoint that it is easy to use without depending on wiping and the dirt does not reverse, and the bulk when laminated is increased. However, 100 g / m ² or less is preferable because a supple feel can be obtained. In particular, 50 to 80 g / m ² is preferable because it is easy to handle at the time of use and has an appropriate bulk at the time of lamination.

  The nonwoven fabric (A) may be a sheet material in which two or more kinds of nonwoven fabrics are overlapped or bonded. Moreover, it is preferable that the shape of a nonwoven fabric (A) is a shape, a magnitude | size, and thickness which are easy to use for a person's hand, for example, a square, a rectangle, a circle | round | yen, an ellipse with a side or a diameter of about 5-20 cm The thickness is preferably about 0.2 to 0.5 mm.

  The oil-in-water type emulsion composition (B) used by this invention contains 0.01-0.5 mass% of water-system thickeners, 5-30 mass% of oil agents whose boiling point is 160-300 degreeC, and water.

  In the present invention, it is preferable to use an aqueous thickener to emulsify the oil agent. In particular, an aqueous thickening polymer having a weight average molecular weight of 1,000 or more is preferred. When emulsified with an aqueous thickener, the oil in the emulsified composition is emulsified and dispersed to such an extent that the detergency is not impaired, and the sheet material is impregnated with the emulsified composition and then a polymer containing oil. When the aqueous thickener is entangled between the fibers, oil can be stably retained in the sheet material.

  Specific examples of the water-based thickening polymer include the following water-soluble polymers. Examples of natural water-soluble polymers include gum arabic, gum tragacanth, galactan, guar gum, carob gum, caraya gum, carrageenan, pectin, agar, quince seed (malmello), alge colloid (gypsum extract), starch (rice, corn, potato, Wheat), plant polymers such as glycyrrhizic acid, microbial polymers such as xanthan gum, dextran, succinoglucan and pullulan, and animal polymers such as collagen, casein, albumin and gelatin. Examples of semi-synthetic water-soluble polymers include starch polymers such as carboxymethyl starch and methylhydroxypropyl starch, methylcellulose, nitrocellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate, hydroxypropylcellulose, Examples thereof include cellulose polymers such as sodium carboxymethyl cellulose (CMC), and alginic acid polymers such as sodium alginate and propylene glycol alginate. Synthetic water-soluble polymers include, for example, vinyl polymers such as polyvinyl alcohol, polyvinyl methyl ether polymers, polyvinyl pyrrolidone, carboxyvinyl polymers (CARBOPOL 940, 941; BF Goodrich), polyethylene glycol 20000, polyethylene glycol 6000, polyoxyethylene polymer such as polyethylene glycol 4000, copolymer polymer such as polyoxyethylene polyoxypropylene copolymer, acrylic polymer such as sodium polyacrylate, polyethyl acrylate, polyacrylamide, polyethylene Examples thereof include imines and cationic polymers.

  In particular, it is more preferable to use an aqueous thickener having a hydrophobic portion because the emulsion composition is less likely to cause a composition change in the sheet material. This is considered to be because the hydrophobic part of the water-based thickener interacts with the oil, so that the oil can be kept relatively stable in water, and the detergency of the oil is not impaired. The aqueous thickener having a hydrophobic portion as used herein refers to a water-soluble polymer having a hydrophobic group having 10 or more carbon atoms in the side chain. Specific examples of such an aqueous thickener having an emulsion stabilizing ability include acrylic acid / alkyl methacrylate copolymers (manufactured by BF Goodrich, trade names: PEMULEN TR-1, TR-2, carbopol ETD, etc. ), Sodium hydroxyethylcellulose hydroxypropyl stearyl ether hydroxypropyl sulfonate (JP-A-9-235301), and the like.

  One or more water-based thickeners can be used in combination. The blending amount of the water-based thickener is 0.01% by mass or more in the total composition from the viewpoint of stabilizing the emulsion, and is 0% in the total composition from the viewpoint of improving the workability by making the viscosity easy to impregnate the sheet material. .5% by mass or less. From the balance between the emulsion stabilizing ability and processability, the aqueous thickener is preferably used in the range of 0.1 to 0.4% by mass in the entire composition.

  In the present invention, an oil agent having a boiling point of 160 to 300 ° C. is used from the viewpoint of cleansing performance for oily makeup cosmetics and a feeling of use with less oiliness. Among these, an oil agent having a boiling point of 160 to 250 ° C. is preferable from the point of weak residual feeling on the skin after use, and further, an oil agent having a boiling point of 160 to 200 ° C., particularly 160 to 190 ° C., leaves cleansing performance and an oily feeling on the skin. It is preferable in that it is not.

  Examples of the oil agent having the boiling point include low-boiling isoparaffins and low-boiling silicone oils, and it is particularly preferable to use 50% by mass or more of the low-boiling isoparaffin in the oil agent having the boiling point from the viewpoint of cleansing performance.

  Low boiling isoparaffin is generally a mixture of hydrocarbons having 8 to 18 carbon atoms, and has a unique odor when it contains low molecular weight hydrocarbons. Since such odors vary in taste depending on the user, it is preferable that the odor does not contain as low a low molecular weight hydrocarbon having 8 to 9 carbon atoms as possible. On the other hand, when a high molecular weight hydrocarbon having 16 to 18 carbon atoms is contained, the detergency is inferior and the oily feeling after use tends to be strong. From such a point, it is preferable that the oil contains a large amount of isoparaffinic hydrocarbon having 10 to 15 carbon atoms. Among them, it is preferable to contain a large amount of isododecane having 12 carbons from the balance of odor, feeling of use and cleansing performance. In particular, low-boiling isoparaffins containing 90% by mass or more, more preferably 95% by mass or more of isododecane are preferably used in the present invention.

  Low-boiling isoparaffins are trade names such as Marcazole R (Maruzen Petrochemical), IP Solvents 1620, 2028, etc. As described above, Nippon Petrochemical Co., Ltd.) and the like can be mentioned, but Marcazole R (Maruzen Petrochemical Co., Ltd.) is particularly preferably used because it contains isododecane with high purity.

  Examples of the low boiling point silicone oil include linear and cyclic silicone oils such as low-polymerization chain dimethylpolysiloxane, octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane.

  Oil agents having a boiling point of 160 to 300 ° C. can be used alone or in combination. The blending amount of the oil agent having a boiling point of 160 to 300 ° C. is 5% by mass or more in the whole composition from the viewpoint of cleansing performance, and the sheet feels less oily feeling and suppresses the hydrophobicity of the sheet material when impregnated with the sheet material. From the point which suppresses the movement of the liquid in a material, it shall be 30 mass% or less in the whole composition. In particular, an oil agent having a boiling point of 160 to 300 ° C. is preferably used in the range of 10 to 25% by mass in the total composition from the balance between cleansing performance, feeling of use and storage stability of the sheet material.

  In the oil phase of the oil-in-water emulsion composition (B), it is possible to mix other oil agents other than the oil agent having a boiling point of 160 to 300 ° C. The other oil agent is preferably used in an amount of 50% by mass or less, particularly 20% by mass or less (based on the prescription amount) with respect to the oil phase from the viewpoint of maintaining the detergency against makeup.

  As other oil agents, oil agents widely used as cosmetic raw materials can be used. Specific examples include hydrocarbons such as liquid paraffin and squalane, higher alcohols such as stearyl alcohol, cetyl alcohol, and oleyl alcohol. , Fatty acids such as oleic acid and linoleic acid, dialkyl ethers such as isostearyl octyl ether, cetyl-1-methylpropyl ether, cetyl-1,3-dimethylbutyl ether, fatty acid esters such as isopropyl myristate and isopropyl palmitate , Fatty acid triglycerides, fluorine oil and the like.

  Further, the water contained in the oil-in-water emulsion composition (B) is 10% by mass in the total composition, more than 30% by mass, especially 50% by mass or more from the viewpoint of sufficient detergency and good usability. It is preferably included. Furthermore, the water phase contained in the oil-in-water emulsion composition (B) is contained in the total composition in an amount of 40 to 95% by mass, and more preferably 70 to 90% by mass, from the viewpoint of sufficient detergency and good usability. It is preferable.

  In the water phase of the oil-in-water emulsion composition (B), a water-soluble solvent can be used for the purpose of enhancing the detergency. In particular, at least one selected from ethylene carbonate, propylene carbonate, hexylene glycol, and 1,2-pentanediol is used in the aqueous phase in order to exert a high cleaning effect on makeup stains that form a film such as mascara. Up to about 50% can be used. The blending amount of the solvent is preferably 1 to 50% by mass, particularly 5 to 25% by mass (based on the prescription amount) with respect to the aqueous phase in terms of detergency and usability.

  Moreover, usability can be improved by including alcohols, such as ethanol and a polyol, in an aqueous phase. In particular, the blending of ethanol is effective for improving the refreshing feeling, and the blending of 1,3-butylene glycol and glycerin is highly effective for improving the moist feeling.

  In the emulsification using a surfactant, the oil agent is stably dispersed in the system and make-up removal is delayed. Therefore, the function of stabilizing the emulsification / dispersion is preferably obtained from the aqueous thickener. The surfactant can be used in a small amount for the purpose of improving the wettability and penetrability of the emulsion composition with respect to the sheet material as long as the effects of the present invention are not impaired. In order to use it within a range that does not interfere with the cleansing performance of the oil agent, the blending amount of the surfactant is preferably 1% by mass or less, more preferably 0.5% by mass or less, particularly 0.05% by mass in the total composition. The following is preferable.

  Surfactant can be used 1 type or in combination of 2 or more types. Specific examples include polyoxyethylene alkyl ethers, sucrose fatty acid esters, fatty acid monoglycerides, sorbitan fatty acid esters and their polyoxyalkylene addition types, polyoxyethylene hydrogenated castor oil, because they are mild to the skin. And nonionic surfactants such as fatty acid esters and polyoxyalkylene fatty acid esters thereof.

  If necessary, a neutralizing agent for neutralizing and thickening the aqueous thickener may be used. The neutralizing agent is not particularly limited, and any neutralizing agent can be used as long as it is acceptable for cosmetics. Examples thereof include inorganic alkali agents such as sodium hydroxide and potassium hydroxide, basic amino acids such as L-arginine, amines such as triethanolamine, ammonia and the like. The addition amount of the neutralizing agent varies depending on the type, and is not particularly limited, and may be determined depending on the type of the water-based thickener, the amount used, etc., but is usually about 0.005 to 0.5% by mass. is there. The neutralizing agent may be added by dissolving in water in advance or directly mixed with an aqueous thickener.

  In addition to the above components, the oil-in-water emulsion composition (B) includes components used in ordinary cleansing compositions such as humectants, oil gelling agents, ultraviolet absorbers, fragrances, pigments, dyes, salts, Various additives such as agents, preservatives, antioxidants, vitamins, proteins, and conditioning agents can be added within a qualitative and quantitative range that does not impair the purpose and effect of the present invention.

  The oil-in-water emulsion composition (B) is prepared by adding an oil phase to an aqueous phase in which an aqueous thickener is dispersed. In that case, it is preferable that the viscosity is adjusted to 100 to 2,000 mPa · s, particularly 200 to 1,000 mPa · s. If it is the said range, it will be excellent in the holding | maintenance of an oil agent, and the ooze-out feeling of the liquid after impregnating an emulsion composition will become enough. In addition, a viscosity means the value measured on conditions of rotor No. 2, 6 rpm, and 30 degreeC using BM type | mold viscosity meter (made by Tokimec).

  The emulsified composition (B) prepared in the present invention is preferably one that is separated into a transparent aqueous phase and a highly viscous emulsified phase from the viewpoint of cleansing performance and usability when it is allowed to stand. . Specifically, a slightly unstable emulsification that, when prepared at 30 ° C. after uniform preparation, separates (creaming) into an aqueous phase and other emulsified phase within 1 day to 1 month. A composition is preferred. Therefore, impregnation into the nonwoven fabric (A) is performed before separation proceeds. The emulsified composition (B) impregnated in the appropriately selected nonwoven fabric (A) can be prevented from moving up and down and separated in the nonwoven fabric. Since the emulsified composition (B) is a slightly unstable emulsified composition, the aqueous phase has better oozing of the liquid from the sheet than the stable emulsified composition whose viscosity is increased by the polymer. And excellent cleansing performance.

  The amount of the emulsified composition (B) to be impregnated with respect to 1 g of the nonwoven fabric (A) is preferably 2 to 5 g, particularly preferably 2.5 to 4.5 g, from the viewpoint of good usability.

  The sheet-like cleansing material of the present invention is manufactured by applying or spraying the emulsified composition (B) to the nonwoven fabric (A) from a nozzle, and then leaving it to sufficiently impregnate the sheet material. Can do.

  The sheet-type cleansing material of the present invention is usually used one by one or by stacking a plurality of sheets and sealing them in a bag. When using, open the bag, take out the sheet-like cleansing material one by one, press it against the site where you want to remove the makeup cosmetic, regardless of whether it is oily makeup cosmetic or aqueous makeup cosmetic, make-up makeup Use as if wiping off the material. Thereby, the cleansing effect excellent with respect to various types of makeup stain | pollution | contamination is exhibited, and both water-based makeup cosmetics and oil-based makeup cosmetics can fully be removed easily and rapidly.

  Even if the cleansing material of the present invention is stored in the form of a laminated sheet for a long period of time, the vertical movement of the impregnating liquid is suppressed and the composition does not change, so that the quality can be stably maintained.

(Cleansing performance evaluation method)
For the evaluation of the cleaning power, an oily mascara, which is the strongest stain among general makeup stains, was used.

0.0045 g of oily mascara (Kose Sports Beauty Facio Power Stay Mascara (Karl Long) BK001 (trade name)) was uniformly applied in a circular shape with a diameter of 1.2 cm on a slide glass and left to dry for 12 hours. Each sheet-type cleansing material was applied to mascara and lightly pressed for 5 seconds, then wiped off at a constant pressure (100 g / cm ² ), and the number of times of wiping required to remove the mascara was measured.
[Evaluation criteria]
◎: 5 times or less ○: 6-10 times Δ: 11-15 times ×: 16 times or more

(Evaluation method of usability)
Ten professional panelists wiped their faces with each sheet-like cleansing material, and then sensoryly evaluated the feeling of the skin.
[Evaluation criteria]
A: Nine or more out of 10 people evaluated that there was no stickiness and oiliness.
◯: 7 to 8 out of 10 people evaluated that there was no stickiness and oiliness.
(Triangle | delta): Five to six persons evaluated that it was not sticky and oily.

(Odor evaluation method)
When 10 professional panelists wiped their faces with each sheet-like cleansing material, or after that, the odor was subjected to sensory evaluation.
[Evaluation criteria]
◯: Eight or more out of 10 people evaluated that the odor was acceptable in use.
Δ: 5 to 7 out of 10 people evaluated that the odor was acceptable in use.

(Quality stability evaluation method: impregnation rate immediately after preparation and after storage)
A nonwoven fabric cut to a size of 75 mm × 200 mm (hereinafter, sometimes referred to as a sheet) was Z-folded and 40 sheets were stacked and impregnated with the emulsified composition. Here, the impregnation rate immediately after preparation is measured.
Next, this laminate was sealed in an aluminum pillow and stored at 50 ° C. for 1 month. Then, it returned to room temperature and evaluated the impregnation rate of the 2nd sheet | seat and 39th sheet | seat from the top, and each cleansing performance. The impregnation rate is calculated by the following equation by measuring the weight of each impregnated sheet, washing the sheet with a detergent, rinsing with water, and measuring the weight of the dried sheet.
Impregnation rate% = (impregnated sheet weight−dry sheet weight) × 100 / dry sheet weight [evaluation criteria]
A: The change in the impregnation ratio after storage is within ± 25% of the impregnation ratio immediately after preparation .
○: The change in the impregnation rate after storage is greater than ± 25 % and within ± 40% with respect to the impregnation rate immediately after preparation .
(Triangle | delta): The change of the impregnation rate after storage is more than ± 40 % and within ± 60% with respect to the impregnation rate immediately after preparation .
X: The change in the impregnation rate after storage is greater than ± 60% with respect to the impregnation rate immediately after preparation .

(viscosity)
Using a BM viscometer (manufactured by Tokimec), measurement was performed under the conditions of rotor No. 2, 6 rpm, and 30 ° C.

(Evaluation of stability of emulsified composition)
The prepared emulsified composition was put in a glass bottle with a screw cap and stored in a thermostatic chamber at 30 ° C. After 1 day, 3 days, 7 days, 10 days, 14 days, and 1 month, changes in appearance were observed.

(Examples 1-10, Comparative Examples 1-3)
An emulsified composition was prepared with the composition shown in Table 1, and 100 g of cotton, a density of 0.15 g / cm ³ , and an average basis weight of 60 g / m ² were added to 3.5 g of the emulsified composition per 1 g of the non-woven fabric. A sample was prepared by impregnation. The evaluation results are also shown in Table 1. The amount of each component is parts by mass.

(Method for producing emulsified composition)
An aqueous thickener (components (1) to (3)) was added to water (component (13)), and the mixture was stirred and dispersed uniformly at 1,200 rpm for 30 minutes. While stirring with a propeller at 200 rpm, a neutralizing agent (component (15)) was added and held for 10 minutes to neutralize and thicken. Stirring was continued, and components (9) to (12) and component (14) were added and dissolved. Thereto, components (4) to (8) were slowly added dropwise and held for 2 hours, and then stirred at 4,500 rpm for 30 minutes to obtain an emulsified composition.

In addition, the origin of the used material is shown below.
* 1 Acrylic acid / alkyl methacrylate copolymer: Trade name PEMULEN TR-2, B.I. F. Goodrich
* 2 Acrylic acid / alkyl methacrylate copolymer: Trade name Carbopol ETD, B.R. F. Goodrich
* 3 Hydroxyethyl cellulose hydroxypropyl stearyl ether sodium hydroxypropyl sulfonate (JP-A-9-235301)
* 4 Low boiling point isoparaffin (boiling point 166-202 ° C.): Trade name IP solvent 1620, Idemitsu Petrochemical Co., Ltd.
* 5 Low boiling point isoparaffin (boiling point 213-262 ° C): Trade name IP Solvent 2028, Idemitsu Petrochemical Co., Ltd.
* 6 Low boiling point isoparaffin (boiling point 175-185 ° C): Trade name Marcazole R, Maruzen Petrochemical Co., Ltd.
* 7 Separated into two phases immediately after preparation

  From the results shown in Table 1, the nonwoven fabric (A) used in the present invention was impregnated with an emulsified composition (B) using a predetermined amount of an aqueous thickener and an oil having a boiling point of 160 to 300 ° C. In Nos. 1 to 10, the oily mascara that was most difficult to remove could be removed easily and quickly, and the usability was good. Even after the non-woven fabrics were laminated and stored, the second and 39th sheets were found to be excellent in cleansing performance and excellent in quality stability. As for the odor, the evaluation using the IP solvent 1620 containing isoparaffins having 8 and 9 carbon atoms was slightly inferior.

  In Example 5, a surfactant was added to the allowable upper limit, and a relatively stable emulsion composition that did not separate after one month was used. The effect of the present invention was obtained, but the same amount of the same low-boiling oil was used. Compared with Example 2, the effect of Example 2 emulsified only with an aqueous thickener was more excellent.

  Moreover, when Example 4 which mix | blended hexylene glycol evaluated the cleansing performance similarly to the above using the film formation type mascara, it was excellent also in the cleansing performance with respect to the film formation type mascara.

  On the other hand, Comparative Example 1 prepared by using a surfactant that is generally used as an emulsifier instead of an aqueous thickener in an amount that is usually blended as a cleansing composition is described in Patent Document 2 (Japanese Patent Laid-Open No. 5-163116). However, the cleansing performance was very inferior and the usability was also poor. In Comparative Example 2 using only an oil agent having a boiling point of 160 to 300 ° C. without using an aqueous thickener, the aqueous composition and the oil phase are separated from the emulsion composition, and the cleansing performance immediately after preparation of the sheet material is excellent. However, after storage, there was a large difference in the liquid impregnation rate and composition, and the 39th sheet after storage was very poor in cleansing performance. Moreover, although the water-system thickener and the oil agent whose boiling point is 160-300 degreeC were used, the comparative example 3 whose amount of this oil agent is more than the quantity used for this invention is inferior to a usability | use_condition, and a liquid is in a sheet | seat. It was not stable, and there was a difference in the impregnation rate and composition of the liquid after storage.

(Examples 11-14, Comparative Examples 4-6)
For the nonwoven fabrics having the composition, density and basis weight shown in Table 2, the emulsified compositions prepared in Example 2 for Examples 11 to 14 and Comparative Examples 4 to 5 were prepared in Example 5 for Comparative Example 6. A sample was prepared by impregnating the emulsified composition with the liquid amount shown in Table 2. The evaluation results are also shown in Table 2. Example 2 is also shown in Table 2.

From the results shown in Table 2, Examples 2 and 11 to 14 according to the present invention were excellent in cleansing performance, usability, and quality stability. On the other hand, Comparative Example 4 using a non-woven fabric having a lower density than that used in the present invention has a difference in the impregnation rate after storage, and after the storage, the cleansing performance differs between the second sheet and the 39th sheet. In addition, Comparative Example 5 using a nonwoven fabric containing 50% of PET (polyethylene terephthalate), which is a hydrophobic fiber, has a difference in the impregnation rate after storage, and the cleansing performance differs between the second sheet and the 39th sheet after storage. became. Furthermore, according to Comparative Example 6 using a stable oil-in-water emulsion composition and a non-woven fabric having a lower density than that used in the present invention, the conditions of the sheet to be impregnated even when a stable oil-in-water emulsion composition is used. When it was not appropriate, it was revealed that the impregnation rate after storage could be different, and the cleansing performance would change and the quality could not be stably maintained.

Claims (4)

Nonwoven fabric (A) having a cellulose content of 70% by mass or more and having a density of 0.15 to 0.3 g / cm ³ , an aqueous thickener 0.01 to 0.5% by mass, and a boiling point of 160 to Underwater that contains 5 to 30% by mass of an oil agent at 300 ° C. and water, and is separated into an aqueous phase and other emulsified phase within one month or more within one month when left at 30 ° C. A sheet-like cleansing material formed by impregnating the oil-type emulsified composition (B).   The sheet-like cleansing material according to claim 1, wherein 50% by mass or more of the oil agent is isoparaffin.   The sheet-like cleansing material according to claim 2, wherein 90% by mass or more of the isoparaffin is isododecane.   The oil-in-water emulsion composition (B) further contains 1 to 50% by mass of the aqueous phase of one or more selected from ethylene carbonate, propylene carbonate, hexylene glycol, and 1,2-pentanediol. The sheet-type cleansing material according to any one of claims 1 to 3.