Methods for expanding the skin area being cleansed during skin cleansing.

Abstract

To provide methods for imparting a sufficient refreshing feeling even if the area of the skin site to be wiped is widened, in the skin cleaning using a skin cleaning tool in which a wipe, such as cosmetic cotton, is impregnated with a skin cleaning composition.SOLUTION: A skin cleaning tool in which a wipe, such as cotton for makeup, is impregnated with a skin cleaning composition that contains polyethylene glycol together with 8 to 20 wt.% of ethanol has improved durability of the effect of imparting a refreshing feeling, and can impart a sufficient refreshing feeling even if the area of the skin site to be wiped is widened.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a method for enlarging a wiped skin region in skin wiping using a skin wiping implement. Background Art

[0002] As skincare products for removing sebum and dirt from the skin to keep the skin in a hygienic state, skin cleansing compositions are widely used. In addition to the effect of removing sebum and dirt from the skin, skin cleansing compositions are required to provide a refreshing feeling during wiping so that a user can perceive the effect. Ethanol has excellent degreasing action, so it is effective for removing sebum and dirt, and can also impart a refreshing feeling upon use, so it is commonly used as a blending component in skin cleansing compositions.

[0003] To improve the removal effect on sebum and dirt on the skin and the refreshing feeling after wiping, it is effective to blend ethanol at a high concentration in the skin cleansing composition. However, since ethanol has skin irritation, there is a limit to improving the sebum and dirt removal effect and the refreshing feeling during wiping only with ethanol. Accordingly, Patent Document 1 proposes an external skin composition containing diethylene glycol monoether and / or triethylene glycol monoether of a specific structure as a preparation that reduces the blending amount of ethanol or improves the feeling of use without blending ethanol. However, the preparation described in Patent Document 1 also reduces the refreshing feeling during wiping, so it still does not have satisfactory performance.

[0004] Furthermore, conventionally, skin cleansing compositions are used in a state of being impregnated into a wiping implement such as a cosmetic cotton. However, when the area of a skin region to be wiped is enlarged, or after one skin region is wiped once, the same implement is repeatedly used to wipe other skin regions, there is a disadvantage that the refreshing feeling is weakened. Prior Art Documents Patent Documents

[0005] [Patent Document 1] Japanese Patent Publication No. 2008-50272 [Overview of the project] [Problems that the invention aims to solve]

[0006] The object of the present invention is to provide a method for providing a sufficient feeling of freshness even when the area of ​​skin to be cleansed is expanded, when using a skin cleansing tool in which a skin cleansing composition is impregnated into a wiping tool such as cosmetic cotton. [Means for solving the problem]

[0007] The inventors of the present invention conducted diligent research to solve the aforementioned problems and found that a skin cleansing composition containing polyethylene glycol along with 8-20% by weight of ethanol, impregnated into a cleansing tool such as cosmetic cotton, provides a longer-lasting refreshing sensation and can provide a sufficient refreshing sensation even when the area of ​​skin being cleansed is expanded. The present invention was completed by further research based on this finding.

[0008] In other words, the present invention provides inventions in the following embodiments. Item 1. A method for expanding the skin area to be cleansed with a skin cleansing device, The method of wiping the skin, wherein a skin wiping tool is used in which a skin wiping composition containing 8-20% by weight of ethanol and polyethylene glycol is impregnated into the wiping tool. Item 2. The method according to item 1, wherein the average molecular weight of polyethylene glycol is 200 to 20000. Item 3. The method according to item 1 or 2, wherein the wiping tool is a cosmetic cotton pad. Item 4. The method according to any one of items 1 to 3, wherein the skin is cleansed over an area of ​​30 times or more the area of ​​the skin cleansing device in contact with the skin. Item 5. The method according to any one of items 1 to 4, wherein one skin cleansing device is used to cleanse two or more different skin areas. Item 6. A method for expanding the area over which the cleansing effect during skin cleansing can be felt, The method of wiping the skin, wherein a skin wiping tool is used in which a skin wiping composition containing 8-20% by weight of ethanol and polyethylene glycol is impregnated into the wiping tool. Item 7. A method for providing a refreshing feeling to a skin cleansing composition, comprising: blending 8-20% by weight of ethanol and polyethylene glycol into the skin cleansing composition. [Effects of the Invention]

[0009] According to the method of the present invention, when wiping the skin using a skin wiping tool impregnated with a skin wiping composition, a sufficient feeling of freshness can be obtained even when the area of ​​skin to be wiped is expanded. Therefore, it is possible to wipe a wide area of ​​skin at once or to repeatedly use one skin wiping tool on different areas of skin, thereby improving the convenience of skin wiping. [Modes for carrying out the invention]

[0010] 1. Method for expanding the skin area cleansed with a skin cleansing device. The present invention relates to a method for expanding the area of ​​skin cleansed with a skin cleansing tool, characterized in that, in the skin cleansing, a skin cleansing tool is used in which a skin cleansing composition containing 8-20% by weight of ethanol and polyethylene glycol is impregnated into the wiper. In the present invention, "expanding the area of ​​skin cleansed with a skin cleansing tool" refers to cleansing a wide area of ​​skin at once or repeatedly using the skin cleansing tool to cleanse two or more areas of skin. The method of the present invention will be described in detail below.

[0011] [Composition for skin cleansing] In the method of the present invention, a skin cleansing composition containing 8-20% by weight of ethanol and polyethylene glycol is used to impregnate the wiping tool. By using a skin cleansing composition containing 8-20% by weight of ethanol and polyethylene glycol in this way, the duration of the refreshing effect on the skin cleansing tool is improved, and it becomes possible to provide a sufficient refreshing feeling even when the area of ​​skin to be cleansed is expanded.

[0012] ·Ingredients included The skin cleansing composition used in the present invention contains 8 to 20% by weight of ethanol. Because it contains ethanol at this concentration, a refreshing feeling can be fully experienced after cleansing the skin. From the viewpoint of further enhancing the effect of removing sebum and dirt from the skin, and providing a refreshing feeling after cleansing, the ethanol concentration in the skin cleansing composition of the present invention is preferably 8 to 17% by weight, more preferably 10 to 15% by weight, and particularly preferably 11 to 13% by weight.

[0013] The skin cleansing composition used in the present invention further contains polyethylene glycol. The inclusion of polyethylene glycol improves the duration of the refreshing effect, making it possible to achieve a sufficient refreshing feeling even when the area of ​​skin being cleansed is expanded or when the wiper is used repeatedly while the composition is impregnated with the wiper.

[0014] The average molecular weight of polyethylene glycol used in the present invention is not particularly limited, and for example, it can be about 200 to 20,000, preferably about 1,000 to 20,000, and more preferably about 2,000 to 20,000. Specifically, polyethylene glycols used in the present invention include polyethylene glycol 200, polyethylene glycol 300, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 1000, polyethylene glycol 1500, polyethylene glycol 1540, polyethylene glycol 2000, polyethylene glycol 3350, polyethylene glycol 4000, polyethylene glycol 6000, polyethylene glycol 8000, polyethylene glycol 9000, polyethylene glycol 11000, polyethylene glycol 12000, polyethylene glycol 20000, etc. Among these polyethylene glycols, polyethylene glycol 200, polyethylene glycol 400, polyethylene glycol 4000, polyethylene glycol 6000, and polyethylene glycol 20000 are preferred from the viewpoint of further improving the persistence of the effect of providing a refreshing feeling.

[0015] Examples of the concentration of polyethylene glycol in the skin cleansing composition used in the present invention include 0.1 to 3% by weight. From the viewpoint of further improving the duration of the refreshing effect, the concentration of polyethylene glycol in the skin cleansing composition of the present invention is preferably 0.3 to 2% by weight, and more preferably 0.5 to 1% by weight.

[0016] The skin cleansing composition used in the present invention may further contain propylene glycol. If propylene glycol is further included, it can provide moisturizing properties. The concentration of propylene glycol in the skin cleansing composition of the present invention is not particularly limited, but for example, it is 0.1 to 30% by weight, preferably 0.5 to 20% by weight, and more preferably 1 to 10% by weight.

[0017] The skin cleansing composition used in the present invention may further contain glycerin. When glycerin is further contained, moisturizing properties can be imparted. The concentration of glycerin in the skin cleansing composition of the present invention is not particularly limited, and examples thereof include 0.1 to 30% by weight, preferably 0.5 to 20% by weight, more preferably 1 to 10% by weight.

[0018] In addition, the skin cleansing composition used in the present invention preferably contains water as a base. The content of water in the skin cleansing composition of the present invention may be the remainder excluding the components to be blended, and examples thereof include 10 to 91.9% by weight, preferably 15 to 89.7% by weight, more preferably 20 to 88.5% by weight.

[0019] The skin cleansing composition used in the present invention may, in addition to the aforementioned components, contain pharmacological components, additives and the like that are used in ordinary skin cleansing compositions as necessary.

[0020] Examples of pharmacological components that can be incorporated into the skin cleansing composition used in the present invention include antibacterial or bactericidal agents (isopropylmethylphenol, hinokitiol, chlorhexidine hydrochloride, chlorhexidine gluconate, triclosan, lysozyme chloride, sulfadiazine, benzalkonium chloride, decalinium chloride, benzethonium chloride, cetylpyridinium chloride, etc.), antihistamines (chlorpheniramine maleate, etc.), local anesthetics (procaine, tetracaine, bupipacaine, mepipacaine, chloroprocaine, propalacaine, meprilcaine or salts thereof, orthocaine, oxypropylmethyl Examples of pharmacological components include sesazain, oxypolyentoxydecane, belladonna extract, percaminate, tesitdecitin, etc., anti-inflammatory agents (dipotassium glycyrrhizinate, glycyrrhetinic acid, allantoin, ε-aminocaproic acid, indomethacin, felbinac, diclofenac sodium, loxoprofen sodium, etc.), skin protectants (collodion, castor oil, etc.), blood circulation promoting components (nonyl vanillylamide, benzyl nicotinate, capsaicin, chili pepper extract, etc.), cooling agents (menthol, camphor, etc.), and mucopolysaccharides (chondroitin sulfate sodium, glucosamine, etc.). These pharmacological components may be used individually or in combination of two or more. When these pharmacological components are included, their content should be appropriately determined according to the type of pharmacological component used, the expected effect, etc.

[0021] Examples of additives that can be blended into the skin cleansing composition used in the present invention include monohydric lower alcohols other than ethanol (propanol, isopropanol, butanol, etc.), polyhydric alcohols other than the foregoing (ethylene glycol, 1,3-butylene glycol, isoprene glycol, diethylene glycol, dipropylene glycol, polypropylene glycol, etc.), surfactants (nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants), preservatives (methylparaben, propylparaben, benzoic acid, sodium benzoate, sorbic acid, etc.), flavoring agents (citral, 1,8-cineole, citronellol, farnesol, etc.), coloring agents (tar pigments (Brown No. 201, Blue No. 201, Yellow No. 4, Yellow No. 403, etc.), cacao pigment, chlorophyll, aluminum oxide, etc.), thickeners (polyvinylpyrrolidone, sodium alginate, ethyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose sodium, xanthan gum, carrageenan, etc.), pH adjusters (phosphoric acid, hydrochloric acid, citric acid, sodium citrate, succinic acid, tartaric acid, sodium hydroxide, potassium hydroxide, triethanolamine, triisopropanolamine, etc.), humectants (dl-pyrrolidone sodium carboxylate solution, D-sorbitol solution, etc.), stabilizers (dibutylhydroxytoluene, butylhydroxyanisole, sodium edetate, sodium metaphosphate, L-arginine, L-aspartic acid, DL-alanine, glycine, sodium erythorbate, propyl gallate, sodium sulfite, sulfur dioxide, chlorogenic acid, catechin, rosemary extract, etc.), as well as antioxidants, ultraviolet absorbers, chelating agents, adhesives, buffers, solubilizing aids, solubilizers, and other additives. These additives may be used alone singly, or two or more kinds may be used in combination. The content of these additives can be appropriately set according to the formulation form and the like.

[0022] • Formulation The shape of the skin cleansing composition used in the present invention is not particularly limited, but it is preferably a shape that is easy to use for cleansing the skin, and especially a shape that is easily impregnated into a wiping tool. Specifically, it is preferably a liquid or semi-solid shape (gel, ointment, paste).

[0023] The formulations of the skin cleansing composition used in the present invention include, specifically, liquids, emulsions, lotions, gels, ointments, and creams. Among these formulations, liquids, emulsions, and lotions are preferred.

[0024] [Wiping tool] In the present invention, the wiping tool impregnated with the skin cleansing composition is not particularly limited, as long as it can be used for cleansing the skin, but examples include cosmetic cotton, cosmetic puffs, nonwoven fabric sheets, woven fabric sheets (gauze, etc.), sponges, etc. The constituent material of these wiping tools is not particularly limited, and may be any of the following: natural fibers, regenerated fibers, semi-synthetic fibers, synthetic fibers, synthetic resins, etc. However, from the viewpoint of the feel when using it for cleansing, natural fibers are preferred, and cotton is more preferably used.

[0025] Among these wiping tools, from the viewpoint of ease of use during wiping, cosmetic cotton, nonwoven fabric sheets, and more preferably cosmetic cotton are preferred.

[0026] [Skin cleaning tool] In the method of the present invention, a skin cleansing tool is used for cleansing the skin, which is impregnated with the skin cleansing composition. The amount of the skin cleansing composition impregnated into the wiper is not particularly limited and can be appropriately set within a range that allows for skin cleansing, depending on the material of the wiper, similar to conventional skin cleansing tools.

[0027] [Skin cleansing] In the method of the present invention, the skin is cleansed using the aforementioned skin cleansing device.

[0028] The skin to be cleansed can be any area where sebum and dirt need to be removed, such as the face, neck, hands, arms, and legs, with the face being preferred.

[0029] In the method of the present invention, the area of ​​skin cleansed by the skin cleansing device is expanded, so that a wide area of ​​skin can be cleansed at once, or a single skin cleansing device can be used repeatedly on different areas of skin.

[0030] More specifically, the method of the present invention allows for the simultaneous wiping of an area of ​​skin approximately 30 times or more, preferably 35 to 80 times, and more preferably 40 to 50 times, the area of ​​the wiping tool (the area of ​​the surface of the wiping tool that comes into contact with the skin). Furthermore, the method of the present invention allows for repeated wiping of two or more skin areas, such as the right cheek, left cheek, forehead, chin, neck, right hand, and left hand.

[0031] 2. Methods for expanding the area to allow users to feel the cleansing effect during skin cleansing. The present invention further provides a method for expanding the area over which the cleansing effect of skin cleansing can be felt by using the skin cleansing tool to cleanse the skin. In the present invention, "expanding the area over which the cleansing effect of skin cleansing can be felt" means expanding the area of ​​skin that can be cleansed and feel refreshed when using the skin cleansing tool to cleanse the skin. This means, for example, applying a refreshing feeling to a large area of ​​skin at once, or repeatedly applying a refreshing feeling to two or more areas of skin. The specific embodiments are as described in section "1. Method for expanding the area of ​​skin cleansed by the skin cleansing tool".

[0032] 3. How to maintain the refreshing feeling effect. The present invention further provides a method for sustaining a refreshing feeling in a skin cleansing composition, which involves incorporating 8-20% by weight of ethanol and polyethylene glycol into the skin cleansing composition. The components and concentrations used in this method, the formulation form of the skin cleansing composition, and the method of use are as described in section 1, "Method for expanding the skin area cleansed by a skin cleansing tool." [Examples]

[0033] The present invention will be described in more detail below with reference to examples, but the present invention is not to be limited by these examples.

[0034] Test Example 1 A skin cleansing composition (skin cleansing lotion) with the composition shown in Tables 1 and 2 was prepared, and a skin cleansing tool was obtained by impregnating a cosmetic cotton pad (100% cotton, 3.5 cm x 5 cm, 2 layers: 0.2 g) with 0.8 ml (400% impregnation) of the skin cleansing composition.

[0035] Using the obtained skin cleansing tools, 10 expert evaluation panelists evaluated the refreshing feeling (first use), refreshing feeling (after repeated use), degree of stickiness, and irritation using the following methods.

[0036] After washing the face, the skin cleansing tool was used to wipe one half of the face approximately three times. After wiping, the feeling of freshness (first time) and the irritation during wiping were scored according to the following criteria. Furthermore, after wiping one half of the face, the skin cleansing tool was used to wipe the other half of the face that had not been cleansed, and the feeling of freshness (after repeated use) was also scored according to the following criteria. <Criteria for judging the refreshing feeling after the first use and after repeated use> 5 points: I was thoroughly impressed by the refreshing feeling it provided. 4 points: I felt a certain degree of refreshing sensation when using it. 3 points: I felt a slight refreshing sensation when using it. 2 points: I didn't really feel a refreshing sensation after using it. 1 point: I didn't feel any refreshing sensation at all. <Criteria for determining irritancy> 3 points: I didn't feel any stimulation at all. 2 points: There was a slight irritation. 1 point: I felt a strong sensation.

[0037] Next, the sum of the scores from each item by the 10 expert evaluation panelists was calculated, and the evaluation was made according to the following criteria. <Refreshing feeling after first use and repeated use> ◎: Total score of 40-50 points (a level that provides a satisfying sense of freshness) ○: Total score of 31-39 points (a level where a sense of freshness can be felt to some extent) △: Total score of 25-30 points (a level where a sense of satisfaction is not really felt) ×: Total score is between 10 and 24 points (a level that does not convey a sense of satisfaction) <Irritation> ◎: Total score of 28-30 points (a level that can be described as completely unstimulating) ○: Total score of 24-27 points (a level where the stimulation is barely noticeable) △: Total score of 20-23 points (a level where a slight stimulating sensation can be felt) ×: Total score of 10-19 points (a level where strong stimulation is felt)

[0038] The results are shown in Tables 1 and 2. In skin cleansing compositions that did not contain ethanol, the refreshing feeling was insufficient even on the first use (Comparative Example 6). In skin cleansing compositions that did not contain polyethylene glycol but contained 5% by weight of ethanol, the refreshing feeling was insufficient on the first use, and after repeated use, the refreshing feeling was completely gone. Furthermore, even in skin cleansing compositions containing 8-25% by weight of ethanol, the refreshing feeling after repeated use was insufficient if polyethylene glycol was not included.

[0039] In contrast, skin cleansing devices using a skin cleansing composition containing polyethylene glycol along with 8-20% by weight of ethanol provided a sufficient feeling of freshness even after repeated use, and made it possible to expand the area of ​​skin being cleansed and the range in which the cleansing effect during skin cleansing could be felt (Examples 1-8). Furthermore, in Examples 1-8, irritation during skin cleansing was also suppressed.

[0040] [Table 1]

[0041] Table 2

Claims

1. A method for expanding the area of ​​skin that is wiped with cosmetic cotton, In the cleansing of the skin, cosmetic cotton is used in which a skin cleansing composition containing 8-20% by weight of ethanol and 0.1-3% by weight of polyethylene glycol, and which does not contain any polyhydric alcohols other than polyethylene glycol, is impregnated into the wiping tool. The polyethylene glycol is at least one selected from the group consisting of polyethylene glycol 2000, polyethylene glycol 3350, polyethylene glycol 4000, polyethylene glycol 6000, polyethylene glycol 8000, polyethylene glycol 9000, polyethylene glycol 11000, polyethylene glycol 12000, and polyethylene glycol 20000. The aforementioned method.

2. The method according to claim 1, wherein the skin is wiped over an area 30 times or more than the area of ​​the contact surface of the cosmetic cotton with the skin.

3. The method according to claim 1 or 2, wherein one cosmetic cotton pad is used to wipe two or more different areas of skin.

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