JP2005145908A - Water-absorbing drying sheet for makeup or beauty and method for using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prepare a sheet for makeup or beauty in dried state using a nonwoven fabric or paper as a base material, capable of being used as the sheet for makeup or the sheet for beauty by absorbing water or liquid cosmetic, and to provide a method for using the sheet. <P>SOLUTION: An aqueous solution of γ-polyglutamic acid 3 is impregnated into a base material 2 composed of paper or nonwoven fabric. As necessary, a crosslinking agent 4 (e.g. a polyvalent epoxy such as ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether or glycerol diglycidyl ether, a polyvalent isocyanate such as hexamethylene diisocyanate, tetramethylene diisocyanate or diisocyanate dodecane) is added thereto. Heat drying 5 of the impregnated material is carried out by hot air, heating press, heating roll, or the like, or by combination thereof. When the sheet is used, the sheet is moistened with water 7, or other liquid cosmetic 6 is included in the sheet and the sheet is used as a water-absorbing sheet 8. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cosmetic / beauty sheet used for a face mask or the like and a method of using the same.

  This will be described with reference to FIG. A technique has already been established in which a cosmetic liquid 16 having a cosmetic effect such as hyaluronic acid or collagen is impregnated into a base material such as a nonwoven fabric or paper and used as a face mask or a beauty sheet 11. However, since most of them are impregnated with the cosmetic liquid 16 as they are, it is necessary to seal them with resin or aluminum foil 19 so that the liquid does not leak. Furthermore, they are vulnerable to microbial contamination and are heavy, so they are expensive to transport. Since many moisturizing components are vulnerable to heat, a special method such as freeze-drying is required to obtain a dried hyaluronic acid or collagen-containing sheet. Moreover, the nonwoven fabric base material 12 itself has low water absorption, and it is difficult to contain a large amount of the cosmetic liquid 16.

  The present invention is a makeup / beauty sheet in a dry state and based on a nonwoven fabric or paper, and can be used as a makeup sheet or beauty sheet when water or a cosmetic liquid is absorbed. It is intended to provide a cosmetic sheet and a method for using the same.

  The dry sheet 1 for water-absorptive cosmetics / beauty according to the invention of claim 1 is obtained by impregnating a base material 2 with an aqueous solution of γ-polyglutamic acid 3 having a molecular weight of 10,000 to 2,000,000, followed by heat drying 5 to obtain γ -Polyglutamic acid is contained so that it may become 0.01-1g per 100 square centimeters.

  The water-absorbing cosmetic / beauty dry sheet 1 according to the invention of claim 2 is impregnated into the base material 2 by adding a cross-linking agent 4 to an aqueous solution of γ-polyglutamic acid 3 having a molecular weight of 10,000 to 2,000,000 and stirring. And then drying by heating 5 and at the same time a crosslinking reaction is carried out to make a part of γ-polyglutamic acid 3 into a water-insoluble water-absorbing polymer, so that γ-polyglutamic acid becomes 0.01 to 1 g per 100 cm 2. It is characterized by being contained.

  In addition, when the molecular weight of γ-polyglutamic acid is less than 10,000, the moisture retention and film forming ability are inferior, and even when crosslinked, there is no water absorption ability, and those having a molecular weight exceeding 2 million have high viscosity and workability. It is bad and feels bad.

  The water-absorbing cosmetic / beauty drying sheet 1 according to the invention of claim 3 is characterized in that, in the invention of claim 2, the crosslinking agent 4 is a polyvalent epoxy or a polyvalent isocyanate.

  The water-absorbent cosmetic / beauty dry sheet 1 according to the invention of claim 4 is characterized in that, in the invention of any one of claims 1 to 3, the substrate 2 is a nonwoven fabric or paper.

  The method of using the water-absorptive cosmetic / cosmetic dry sheet 1 according to the invention of claim 5 is the method of using the water-absorbing cosmetic / cosmetic dry sheet according to any one of claims 1 to 4, wherein the water 7 or / and The cosmetic liquid 6 is absorbed and used in close contact with the skin.

  By drying the cosmetic / beauty sheet 1, there is no need to worry about contamination and leakage, and it is not necessary to seal with a resin or aluminum foil. Reduces weight and makes transportation easier.

  When the makeup / beauty sheet 1 is wetted with water or a cosmetic solution and brought into close contact with the skin, γ-polyglutamic acid is eluted, and the moisturizing effect and film forming effect of γ-polyglutamic acid can be imparted to the skin.

  When the cross-linking agent 4 is added, a large amount of water or serum is absorbed by wetting it with water or serum, so that it can be attached to the skin to provide a wrapping effect that suppresses the transpiration of moisture. The amount of moisture can be increased.

  This will be described with reference to FIG. A base material 2 made of paper or nonwoven fabric is impregnated with an aqueous solution of γ-polyglutamic acid 3. If necessary, a crosslinking agent 4 (polyhydric epoxy such as ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerol diglycidyl ether, polyvalent isocyanate such as hexamethylene diisocyanate, tetramethylene diisocyanate, diisocyanate dodecane, etc.) Added. Heat drying 5 is performed by hot air, a heating press, a heating roll or the like, or a combination thereof. Wet with water 7 during use. Or other cosmetic liquid 6 is included and used as the water absorbing sheet 8.

[1] Addition of γ-polyglutamic acid (A) Sodium γ-polyglutamate having a molecular weight of about 1 million was dissolved in distilled water to prepare a 5% aqueous solution.
(B) A 20 cm × 20 cm cellulose nonwoven fabric (Nisshinbo Co., Ltd., Oikos PL2060) was impregnated with 15 ml of the above aqueous solution.
(C) A hot plate press adjusted to 105 ° C. was heated for 10 minutes and dried to obtain a nonwoven fabric containing 0.19 g of γ-polyglutamic acid per 100 square centimeters.
[2] Sensory evaluation A nonwoven fabric containing γ-polyglutamic acid and a nonwoven fabric not containing γ-polyglutamic acid were both wetted in water, and each was adhered to the inner side of the forearm for 5 minutes. As a result, the skin in the part adhered to the non-woven fabric containing γ-polyglutamic acid was more moist and moist and had a smooth feel. It was confirmed that the nonwoven fabric containing γ-polyglutamic acid has a moisturizing effect and a film forming effect. At this time, uncrosslinked γ-polyglutamic acid is contained in the nonwoven fabric in the form of γ-polyglutamic acid sodium salt. Therefore, when water is absorbed by the nonwoven fabric, it is eluted in the form of γ-polyglutamic acid ions.

[1] Addition of crosslinking agent (a) Sodium γ-polyglutamate having a molecular weight of about 1 million was dissolved in distilled water to prepare a 5% aqueous solution.
(B) The pH was adjusted to 4.5 using 5N hydrochloric acid.
(C) Ethylene glycol diglycidyl ether was added as a cross-linking agent so as to be 5% and 10% based on the weight of γ-polyglutamic acid.
(D) A 5 cm × 5 cm cellulose nonwoven fabric (Nisshinbo Co., Ltd., Oikos PL2060) was impregnated with 1 ml each of the above aqueous solution.
(E) The above-mentioned nonwoven fabric was heated and dried for 10 minutes with a hot plate press adjusted to 105 ° C. to obtain a nonwoven fabric containing 0.2 g of crosslinked γ-polyglutamic acid per 100 square centimeters.
[2] Measurement of water absorption rate (a) The weight of the obtained nonwoven fabric was accurately measured.
(B) The immersion tank was filled with distilled water, and the nonwoven fabric was completely immersed in this, and left for 20 minutes.
(C) The non-woven fabric is taken out of the dipping tank and two dried No.s. Sandwiched between two filter papers.
(D) Further, the two filter papers were sandwiched between acrylic plates, and a weight of 300 g was placed on the top and left for 30 seconds.
(E) Immediately, the nonwoven fabric was accurately weighed and the water absorption was calculated.
As a method for preparing an aqueous solution of γ-polyglutamic acid, only a method of preparing γ-polyglutamic acid (sodium) salt in advance in both Examples 1 and 2 and dissolving it in water to make an aqueous solution was shown. While stirring glutamic acid in water, sodium hydroxide or the like may be added and dissolved in water.
[3] Results Addition amount of cross-linking agent Water absorption rate Non-woven fabric only (control) 132%
2.0% 246%
5.0% 617%
10.0% 396%
The water absorption rate can be controlled by adjusting the addition amount of the crosslinking agent. If the amount of the crosslinking agent is small, the crosslinking is insufficient, so that the water cannot be retained. However, if the amount of the crosslinking agent is too large, the crosslinking becomes dense and it becomes difficult to retain the water.

Comparative Example 1

[1]
(A) Sodium γ-polyglutamate having a molecular weight of about 1 million was dissolved in distilled water to prepare a 0.03% aqueous solution.
(B) A 20 cm × 20 cm cellulose nonwoven fabric (Nisshinbo Co., Ltd., Oikos PL2060) was impregnated with 15 ml of the above aqueous solution.
(C) A hot plate press adjusted to 105 ° C. was heated for 10 minutes and dried to obtain a nonwoven fabric containing 0.0011 g of γ-polyglutamic acid per 100 square centimeters.
[2] Sensory evaluation A nonwoven fabric containing γ-polyglutamic acid and a nonwoven fabric not containing γ-polyglutamic acid were both wetted with water, and each was adhered to the inner side of the forearm for 5 minutes. As a result, there was almost no difference between the nonwoven fabric containing γ-polyglutamic acid and the nonwoven fabric not containing γ-polyglutamic acid.

Comparative Example 2

[1]
Similarly, an 80% aqueous solution of γ-polyglutamic acid was prepared, applied to the nonwoven fabric and dried to obtain a nonwoven fabric containing 3.0 g per 100 square centimeters.
[2] Sensory evaluation A nonwoven fabric containing γ-polyglutamic acid and a nonwoven fabric not containing γ-polyglutamic acid were both wetted with water, and each was adhered to the inner side of the forearm for 5 minutes. As a result, the non-woven fabric containing γ-polyglutamic acid was sticky and had a poor feel.
Further, it has been found that dissolution of γ-polyglutamic acid takes time, viscosity is high, work efficiency is lowered, and it is not practical.

Comparative Example 3

[1]
(Ii) 0.03% and 80% aqueous solutions of γ-polyglutamic acid were prepared.
(B) The pH was adjusted to 4.5 using 5N hydrochloric acid.
(C) Ethylene glycol diglycidyl ether was added as a crosslinking agent so as to be 5% based on γ-polyglutamic acid.
(D) The nonwoven fabric was impregnated with an aqueous solution in the same manner as in Example 2 and dried to obtain nonwoven fabrics containing 0.0012 g and 3.2 g of γ-polyglutamic acid per 100 square centimeters, respectively.
(E) In the same manner as in Example 2, the water absorption ratio of each nonwoven fabric was observed.
γ-polyglutamic acid content Absorption capacity Non-woven fabric only (control) 132%
0.0012g 135%
3.2 g About 120 times [2] Evaluation When the γ-polyglutamic acid content is 0.0012 g, there is almost no water absorption effect. When the content is 3.2 g, the water absorption magnification is large, but it takes time to dissolve. It was found that the non-woven fabric was hard and uncomfortable to the touch.

It is a manufacturing-process figure of the conventional liquid-containing beauty sheet. FIG. 3 is a production process diagram of a γ-polyglutamic acid-containing and water-absorbing dry cosmetic sheet according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cosmetic / Beauty sheet 2 Base material 3 γ-Polyglutamic acid 4 Cross-linking agent 5 Heat drying 6 Beauty liquid 7 Water 8 Water absorption sheet 11 Beauty sheet 12 Base material 16 Beauty liquid 19

Claims (5)

  The base material (2) is impregnated with an aqueous solution of γ-polyglutamic acid (3) having a molecular weight of 10,000 to 2,000,000, and then dried by heating (5) to 0.01 to 1 g of γ-polyglutamic acid per 100 cm 2. A γ-polyglutamic acid-containing water-absorbing cosmetic / beauty dry sheet, characterized by comprising:   A crosslinking agent (4) is added to an aqueous solution of γ-polyglutamic acid (3) having a molecular weight of 10,000 to 2,000,000, stirred, impregnated into the substrate (2), and then heated and dried (5). , By carrying out a crosslinking reaction, a part of γ-polyglutamic acid (3) is made into a water-insoluble water-absorbing polymer, and γ-polyglutamic acid is contained in an amount of 0.01 to 1 g per 100 square centimeters. A gamma-polyglutamic acid-containing water-absorbing cosmetic / beauty dry sheet.   The gamma-polyglutamic acid-containing water-absorbing cosmetic / beauty dry sheet according to claim 2, wherein the crosslinking agent (4) is a polyvalent epoxy or a polyvalent isocyanate.   The gamma-polyglutamic acid-containing water-absorbing cosmetic / beauty dry sheet according to any one of claims 1 to 3, wherein the substrate (2) is a nonwoven fabric or paper.   The base material (2) is impregnated with an aqueous solution of γ-polyglutamic acid (3) having a molecular weight of 10,000 to 2,000,000, and then dried by heating (5) to 0.01 to 1 g of γ-polyglutamic acid per 100 cm 2. When using the γ-polyglutamic acid-containing dry sheet for water-absorbing cosmetics and cosmetics, the water (7) or / and the cosmetic liquid (6) are absorbed and used in close contact with the skin. The usage method of the dry sheet | seat for gamma-polyglutamic acid containing water-absorptive cosmetics and beauty in any one of Claims 1-4 characterized by the above-mentioned.

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