JP2761936B2 - Packing agent - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a sheet-shaped pack agent used for a pack cosmetic method.

[Prior Art] Packing agents are cosmetics that have been used for a long time. In this method, a water-retained powder or coating substance (mainly a water-soluble polymer) is dispersed and dissolved in a solvent, applied to the skin surface to an appropriate thickness, dried after a certain period of time, and removed. After application, the stratum corneum of the skin becomes soft by being retained by the pack and moisture coming from under the skin, and the beautiful skin component contained in the pack penetrates the skin. Furthermore,
During the drying process, it gives the skin moderate tension, and after drying, temporarily raises the skin temperature and improves blood circulation. Thus, at the time of drying and removal, dirt and aged keratin on the skin are removed, and a cosmetic effect is exhibited.

Conventionally, as a pack agent used in the pack beauty method,
Contains mainly water-soluble polymers such as polyvinyl alcohol,
An O / W emulsion or jelly-like peel-off type having a film-forming ability, or a rinse-off type obtained by finishing a powdery substance into a mud or cream with water or the like is commercially available.

Of these packs, the peel-off type is removed by peeling off the formed film after drying, but the hands and the like become dirty at the time of application, it takes a long time to dry, and it is insufficient. There is a problem that the film is broken at the time of peeling due to the high film strength and a part of the film easily remains.

In addition, we wash off thing of washing type after drying,
Alternatively, it is removed by wiping, but this also has problems in that hands and the like become soiled at the time of application, and that subsequent cleaning and removing operations are troublesome.

In order to solve the problems of the conventional packing agent, research and development on a packing agent formed in a sheet shape in advance have been performed. Examples of the sheet pack include those using a rubber-based hydrogel as a base (Japanese Patent Laid-Open No.
JP-A-92306), and those using a polyacrylate, a polyhydric alcohol and water as main components (JP-A-54-49334) have been proposed.

[Problems to be Solved by the Invention] However, among those using a rubber-based hydrous gel, water does not form a continuous phase due to the structure in which water is retained between the skeletons of the gel, and is applied to the skin. Has an excessively strong adhesive force, and may exfoliate the stratum corneum on the skin surface at the time of exfoliation, possibly damaging the skin. In addition, there is a problem in that the effect of softening the skin by water and the effect of absorbing beautiful skin components are poor.

Further, the combined use of a water-soluble polymer, a polyhydric alcohol and water has a problem that the adhesion to the skin is weak and the cohesive force of the base is low, so that the shape retention at high temperatures is poor.

Therefore, the present invention provides a sheet-like pack which has an appropriate adhesive force to the skin, that is, has an excellent feeling of close contact, has excellent shape retention at high temperatures, and has a high absorption effect of moisture and the like on the skin, that is, a moist feeling. It is intended to provide an agent.

[Means for Solving the Problems] Under such circumstances, the present inventors have conducted intensive studies in order to solve the above-mentioned object, and as a result, using a gel formed of xanthan gum, locust bean gum, a water-soluble solvent and water. The present inventors have found that excellent sheet-like packs can be obtained for all of the above properties, and have completed the present invention.

That is, the present invention provides a gel containing xanthan gum and locust bean gum in a weight ratio of 3: 1 to 1:19, 1 to 6% by weight in total, 1 to 40% by weight of a water-soluble solvent and 50 to 98% by weight of water. An object of the present invention is to provide a pack characterized in that a product is formed into a sheet.

The xanthan gum used in the present invention is not particularly limited, and commercially available products such as, for example, Echo Gum and Celtrol manufactured by Kelco can be used.

The locust bean gum used in the present invention is not particularly limited. For example, commercially available products such as Neosoft L (trade name, manufactured by Taiyo Kagaku Co., Ltd.) can be used.

As the water-soluble solvent used in the present invention, for example, 1,3
-Water-soluble solvents generally used in cosmetics, such as butylene glycol, ethanol, glycerin, polyethylene glycol, and sorbitol. These water-soluble solvents have a function as an auxiliary agent for swelling xanthan gum and locust bean gum in water,
For example, 1,3-butylene glycol, glycerin and the like can give a moist feeling and alcohol can give a refreshing feeling to a pack.

The sheet-shaped packing agent of the present invention is a water-soluble polymer, a water-absorbing resin, an inorganic filler, a tackifier, a pH adjuster, a surfactant, a chelating agent, a cross-linking agent, an oxidizing agent used in other general cosmetics. Components such as an inhibitor, an ultraviolet ray inhibitor, a preservative, a beautiful skin component, a coloring agent, and a fragrance can be added to such an extent that the effects of the present invention are not impaired.

The sheet pack of the present invention is manufactured by, for example, mixing xanthan gum and locust bean gum with a water-soluble solvent, then mixing with hot water to swell to form a gel, and stretching this into a sheet. . It may be used as it is without laminating it to the support, but in consideration of usability, it is preferable to laminate it to the support to protect the sheet. Examples of the support include a plastic film such as ethylene-vinyl acetate copolymer, vinyl chloride, polyurethane, and polyester; a nonwoven fabric such as nylon, rayon, urethane, and absorbent cotton; a cloth or an elastic cloth; and paper, cellophane, and the like. Can be used. At this time, it is also possible to use a device capable of imparting shear stress, such as a single-screw extruder or a twin-screw extruder, to mix the materials and to continuously mold the sheet into a sheet shape by the die shape of the discharge port.

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto.

Examples 1 to 4 and Comparative Examples 1 to 4 Each sheet-shaped pack having the formulation shown in Table 1 was produced by the following procedure using an extruder. Next, tests were performed on the feeling of adhesion to the skin, the shape retention at high temperatures, and the moist feeling of these sheet packs. The results are also shown in Table 1.

(Production method) Examples 1-4 and Comparative examples 1-2: Components (1) and (2) are wetted with (3).

Add (15) to component (14), heat to 80 ° C. or higher, and add to swell.

Form into a sheet.

Comparative Example 3: Components (4) to (7) were mixed and dissolved by heating at 110 ° C.

After the addition of the component (8), the components (14) and (15) are added with stirring to obtain a W / O emulsion.

Form into a sheet.

Comparative Example 4: Components (9) to (12) are wetted with (13).

Add components (14) and (15) and swell.

Form into a sheet.

(Evaluation method) The sheet-shaped pack was cut into a size suitable for the face, and required cutouts corresponding to the eyes and the mouth were provided to obtain test samples.

The sample was affixed to the face of 10 panelists and held for 20 minutes, and the feeling of adhesion to the skin and the feeling of moistness were evaluated in two levels of 、 and × according to the following criteria.

The state of the sample after standing at 60 ° C. for 24 hours was observed, and the shape retention at high temperature was similarly evaluated.

 ：: Satisfactory as a sheet-like packing agent.

 ×: Not satisfactory as a sheet-like packing agent.

 -: A sheet could not be formed.

[Effects of the Invention] As described above, the sheet-shaped pack of the present invention solves the drawbacks of the conventional peel-off type or wash-off type pack and has a moderately high adhesive strength to the skin. It is an excellent pack which is excellent in shape retention at high temperatures, has a high effect of absorbing moisture and the like to the skin, and has solved the drawbacks of other sheet packs.

Claims (1)

(57) [Claims] 1. A gel containing xanthan gum and locust bean gum in a total weight ratio of 3: 1 to 1:19 of 1 to 6% by weight, a water-soluble solvent of 1 to 40% by weight and water of 50 to 98% by weight. Packing agent, characterized by forming a product into a sheet.