JPH1121211A - Sheet for cleaning skin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject sheet, having a high detergency and a high cleaning rate for makeup foulings or sebum foulings, low irritant to skin and excellent in even feeling of use, operating efficiency and stability by including a specific nonionic surfactant, a polyhydric alcohol or a glycol ether and water in a sheet. SOLUTION: This sheet is obtained by including (A) a nonionic surfactant having 10-16 HLB e.g. a polyethylene glycol ester of a higher fatty acid represented by the formula RCOO-(CH2 CH2 O)n -H [RCO is a 4-30C acyl; (n) is 1-50]} in an amount of 0.01-5 pts.wt. based on 1 pt.wt. sheet (e.g. a nonwoven fabric, having 20-120 g/m<2> average basis weight and made of natural fibers), (B) a polyhydric alcohol or a glycol ether (e.g. glycerol, sorbitol or diethylene glycol monoethyl ether) in an amount of 0.01-3 pts.wt. based on 1 pt.wt. sheet and (C) water in an amount of 0.5-9.5 pts.wt. based on 1 pt.wt. sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin cleaning sheet which has high detergency for makeup stains and sebum stains, has low skin irritation, is excellent in operability, and has good stability.

[0002]

2. Description of the Related Art Make-up cosmetics such as lipstick, foundation, eyeshadow, mascara, etc., require a large amount of oil,
Since it contains a solid oil, the use of a solid or paste-like facial cleanser mainly composed of ordinary soap is insufficient in solubilization and emulsification, and it is difficult to remove makeup stains. Conventionally, in order to remove such makeup stains, gel cleansing agents, cleansing creams, cleansing oils, and the like mainly containing an oily base have been used.

[0003] However, these cleansing agents mainly composed of an oily base are insufficient in cleaning sebum stains such as solid stains clogging pores, and also leave an oily feeling. After washing, it was necessary to wash again with a paste-like face wash or the like. Also,
When used in a hot and humid place, the cleansing agent mainly composed of an oily base has a problem that the stability is deteriorated due to the inclusion of water, and the cleansing agent is separated or the detergency is reduced.

Further, a detergent composition for removing oily stains such as make-up and sebum is required to have low irritation to the skin. However, using a fatty acid soap or an anionic surfactant as a base generally causes high irritation to the skin. In addition, even when a non-ionic surfactant having a low irritation and a good detergency is used as a base, when a thickener is added as in a commercially available detergent,
There has been a problem that the washing speed of the surfactant is remarkably reduced, and a feeling of sliminess is generated during use. When a thickener is not used to avoid the drawbacks caused by such thickeners, operability such as low viscosity of the system, washing agent flowing from the face during face washing and soiling clothes, etc. Gets worse.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to have a high detergency and a high detergency for makeup stains and sebum stains, and to be less irritating to the skin, and to be excellent in use feeling. Another object of the present invention is to provide a skin cleaning sheet having good operability and stability.

[0006]

Under such circumstances, the present inventors have conducted intensive studies and as a result, have found that a sheet contains a specific nonionic surfactant, a polyhydric alcohol or glycol ether and water. The skin cleaning sheet has high detergency and cleaning speed for oily stains such as make-up and sebum, has low skin irritation, is excellent in use feeling, and has good operability and stability. The inventors have found that the present invention has been completed.

That is, according to the present invention, (a) 0.01 to 5 parts by weight of a nonionic surfactant of HLB 10 to 16 and (b) 0.1 to 5 parts by weight of a polyhydric alcohol or glycol ether are added to 1 part by weight of a sheet. The present invention provides a skin-cleaning sheet containing 0 to 1 part by weight and (c) 0.5 to 9.5 parts by weight of water.

[0008]

DETAILED DESCRIPTION OF THE INVENTION The nonionic surfactant of component (a) used in the present invention is HLB 10 to 16, preferably HLB 12 to 14. If the HLB is less than 10, it is difficult to use in an aqueous system, and if the HLB is more than 16, a sufficient detergency cannot be obtained.

[0009] HLB is a balance between hydrophilicity and lipophilicity (Hydrophile-Lipophile Ba).
The present invention uses a value calculated using the following equation by Oda and Teramura et al.

[0010]

(Equation 1)

The nonionic surfactant of the component (a) is not particularly limited as long as it is used in a usual detergent composition. In particular, polyethylene glycol higher fatty acids represented by the following general formula (1) Esters are preferred because they are less irritating to the skin.

[0012]

Embedded image RCOO— (CH ₂ CH ₂ O) _n —H (1) wherein RCO represents a saturated or unsaturated acyl group having 4 to 30 carbon atoms, and n represents 1 to 1 on a weight average. 50 is shown)

In the formula, RCO represents a saturated or unsaturated acyl group having 4 to 30 carbon atoms, particularly one having 10 to 22 carbon atoms;
For example, a caprinoyl group, a lauroyl group, a myristoyl group, a palmitoyl group, and a stearoyl group are preferable. N represents a number of 1 to 50 in weight average, and particularly 10 to 3
0 is preferable because the cleaning power becomes higher.

The nonionic surfactant of the component (a) comprises 1
Species or two or more kinds can be used in combination, and 0.01 to 5 parts by weight, preferably 0.0
3 to 2 parts by weight, particularly preferably 0.05 to 1.5 parts by weight, is blended. When the amount is less than 0.01 part by weight, sufficient detergency cannot be obtained, and when the amount exceeds 5 parts by weight, stickiness or sliminess is caused, and the feeling of use is remarkably deteriorated.

The component (b) used in the present invention is a polyhydric alcohol or glycol ether. Examples of the polyhydric alcohol include ethylene glycol, propylene glycol, isoprene glycol, dipropylene glycol, 1,3-butylene glycol, diethylene glycol, dipropylene glycol, glycerin, pentaerythritol, sorbitol and the like; Ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol mono Chirueteru, ethylene glycol monophenyl ether and the like.

Of these, ethylene glycol,
Propylene glycol, isoprene glycol, dipropylene glycol, glycerin, 1,3-butylene glycol, sorbitol, diethylene glycol monoethyl ether are preferred from the viewpoint of feeling of use, and glycerin and sorbitol are more preferred from the viewpoint of detergency and low irritation. .

As the component (b), one or more of these polyhydric alcohols and glycol ethers can be used in combination, and 0.01 to 3 parts by weight per 1 part by weight of the sheet, Preferably 0.02 to 2 parts by weight, particularly preferably 0.05 to 1.5 parts by weight is blended. If less than 0.01 parts by weight, sufficient detergency cannot be obtained,
If it exceeds 3 parts by weight, the feeling of use becomes heavy.

Water as the component (c) is used in an amount of 0.5 to 9.5 parts by weight, preferably 0.6 to 9.0 parts by weight, per part by weight of the sheet.
Parts by weight, particularly preferably 0.7 to 8.5 parts by weight.

In the sheet of the present invention, in addition to the above essential components, components used in ordinary cleaning compositions such as humectants, bactericides, preservatives, chelating agents, electrolyte substances, medicinal agents, pigments, fragrances, An antioxidant, a pH adjuster and the like can be appropriately compounded within a range that does not impair the effects of the present invention.

The sheet used in the present invention is not particularly limited, and for example, any of woven or non-woven fabric of natural fibers or synthetic fibers can be used. In particular,
For example, woven or non-woven fabrics such as rayon, acetate, acrylic, polyester, polyethylene, polypropylene, polyurethane, polyamide, and cotton, and paper tissue (made of natural pulp) can be used.

Of these, nonwoven fabrics made of hydrophilic fibers (made of natural or synthetic fibers), such as cotton and rayon, are preferred because they can be easily manufactured and their feel can be easily controlled. It is more preferable because the skin feel is good. The average basis weight of the sheet is 20 to 1
It is preferably 20 g / m ² , especially 30 to 100 g / m ^2.
The m ² , and more preferably 40 to 80 g / m ² , is preferable because the feeling in use is good and the wiped dirt does not run behind.

The sheet of the present invention is produced by incorporating the above-mentioned components into the above-mentioned sheet in a predetermined amount. In particular, the sheet is preferably produced by impregnating the sheet with an aqueous composition containing the above-mentioned components. Here, the concentration of the component (a) in the aqueous composition is 1 to 50 parts by weight, particularly 3 to 2 parts by weight.
It is preferably 0 parts by weight, more preferably 5 to 15 parts by weight. The concentration of the component (b) is 1 to 30 parts by weight, particularly 2 to 20 parts by weight.
Parts by weight, more preferably 5 to 15 parts by weight.

The method of impregnating the sheet with the aqueous composition is not particularly limited. For example, the aqueous composition is preferably from 1 to 10 g / g, particularly preferably from 2 to 5 g / g, by spraying. It is preferable to impregnate the resin, because the detergency and the feeling in use are good.

[0024]

EFFECTS OF THE INVENTION The skin-cleaning sheet of the present invention has high detergency and cleaning speed against oily stains such as makeup and sebum while having low irritation to the skin, and has a feeling of residualness after use. There is no sliminess and the like, and the feel is excellent, and the operability and stability are good.

[0025]

EXAMPLES Next, the present invention will be further described with reference to examples, but the present invention is not limited to these examples.

Example 1 An aqueous composition having the composition shown in Tables 1 to 3 was prepared by a conventional method, and this was impregnated into a sheet shown in Tables 1 to 3 in a predetermined amount.
A skin cleaning sheet was obtained. The resulting sheet was evaluated for detergency, cleaning rate, operability, feel upon use, skin irritation and stability. The results are shown in Tables 1 to 3.

(Evaluation method) (1) Detergency: A fixed amount of lipstick was applied to the inner side of the lower arm of the person, and after the color difference measurement (E1), the same number of wipings were performed with a constant pressure using each cleaning sheet. Further, in the case of the washing liquid, washing was performed after the same number of massages were performed at a constant pressure. Later, the color difference is measured again (E2). The cleaning rate is calculated from the following equation.

[0028]

(Equation 2)

The color difference meter is a Minolta color difference meter CR-300.
(Minolta Camera Co., Ltd.) was used. Evaluation was made according to the following criteria. ：: 70% or more. Δ: 50% or more and less than 70%. X: Less than 50%.

(2) Washing speed: When a fixed amount of lipstick is applied to the inner side of the lower arm of the person and wiped once with a certain pressure using each washing sheet, or once with a constant pressure using a washing solution. When the detergency calculated by the above measurement is 7
The number of wipes required to indicate 0% was measured and evaluated according to the following criteria. ：: Less than 5 times. Δ: 5 to 9 times. X: 10 times or more.

(3) Operability: The ease of handling when applying each cleaning sheet and cleaning solution to the face was evaluated by a specialized panelist according to the following criteria. ：: The cleaning liquid does not flow from the face and is easy to use. ×: The cleaning solution flows from the face, making it difficult to use.

(4) Feeling of Use: The feeling of use such as residual feeling, slimy feeling, and refreshing feeling after wiping with a cleaning panel using a cleaning panel or using a cleaning liquid is evaluated according to the following criteria. Sensory evaluation was performed according to the following. A: Very good. ○: Good (like). Δ: Normal. X: Bad (dislike).

(5) Skin irritation: Using cultured cells derived from rabbit cornea, the concentration (IC ₅₀ ) at which the growth of 50% of cells was inhibited was calculated and evaluated according to the following criteria. Weak irritation: IC ₅₀ is more than 500ppm. Moderate irritation: less than 500ppm IC ₅₀ is 200ppm or more. Strong irritation: IC ₅₀ is less than 200 ppm.

(6) Stability: Each skin cleaning sheet or cleaning solution was stored in a constant temperature room at 50 ° C. to −5 ° C., and the appearance after one month was evaluated according to the following criteria. ：: good at all temperatures. Δ: Change in appearance due to temperature. X: Separation.

[0035]

[Table 1]

[0036]

[Table 2]

[0037]

[Table 3]

*: Sheet A; Cotton non-woven fabric (Cot Ace C040S / A01 manufactured by Unitika Ltd.), basis weight 40 g / m ² , impregnation amount 3.5 g / g Sheet B: Cotton non-woven fabric (Cot Ace C060S / A01 manufactured by Unitika Limited) 60 g / m ² , impregnation amount 3.5 g / g Sheet C; Cotton non-woven fabric (Cot Ace C060S / A01 manufactured by Unitika), basis weight 60 g / m ² , impregnation amount 5 g / g Sheet D; Rayon non-woven fabric (Piros P manufactured by Ohmicenshi)
XD0060) Basis weight 60 g / m ² , impregnation amount 3.5 g / g

Example 2 An aqueous composition having the following composition was prepared by a conventional method, and impregnated with 3.5 g / g of a 100% cotton non-woven fabric (Cot Ace C060S / A01 manufactured by Unitika) to clean the skin. A sheet was manufactured. The obtained skin-cleaning sheet has a high detergency and a high cleaning rate against oily dirt, and can efficiently clean the skin regardless of the place of use, without soiling clothes with liquid dripping. It had low irritation, little residual feeling and sliminess after use, and good stability.

[0040]

(Ingredient) (% by weight) Polyethylene glycol monolaurate (n = 12) HLB 13.8 10.00 Sorbit solution (70%) 4.00 Ethanol 5.00 Methylparaben 0.20 Ethylparaben 0.05 Propylparaben 0 .05 Perfume 0.05 Purified water Balance 100.00

Claims (4)

[Claims] 1. An HLB1 (a) per 1 part by weight of a sheet
0.01 to 5 parts by weight of a nonionic surfactant of 0 to 16 and 0.01 to 5 parts by weight of a polyhydric alcohol or glycol ether.
A skin-cleaning sheet containing 3 parts by weight and (c) 0.5-9.5 parts by weight of water. 2. Component (a) is represented by the following general formula (1): RCOO- (CH ₂ CH ₂ O) _n -H (1) (wherein RCO has 4 to 30 carbon atoms) Wherein n represents a number of 1 to 50 on a weight average). The skin-cleaning sheet according to claim 1, which is a nonionic surfactant represented by the following formula: 3. The skin cleanser according to claim 1, wherein the component (b) is ethylene glycol, propylene glycol, isoprene glycol, dipropylene glycol, glycerin, 1,3-butylene glycol, sorbitol or diethylene glycol monoethyl ether. Sheet. 4. The skin cleaning sheet according to claim 1, wherein the sheet is a woven or non-woven fabric of natural fibers or synthetic fibers.