JP2599130B2 - Sheet-like packing material - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a sheet-like pack material used as cosmetics for skin.

[Background Art] A pack material is used to impart appropriate tension to the skin and absorb and remove dirt on the skin surface. These pack materials are generally blended with various components having a so-called cosmetic effect (cosmetic components) that provide moisture to the skin by increasing water retention or softening.

The above-mentioned pack materials are supplied in a jelly form, a paste form, a powder form, and the like. Some of them form a film to give tension to the skin and remove the film to remove dirt on the skin surface. It has become. In some cases, such an effect is obtained by the action of components contained such as an astringent without forming a film.

Recently, a pack material formed in a sheet shape in advance, instead of a jelly-like, paste-like, or powder-like state as described above, has come to be produced.

However, none of the commercial products of the sheet-shaped pack material had the effect of removing dirt on the skin surface because they did not have tackiness.

JP-A-60-165902 also discloses a film-shaped pack material. This is on the surface of a flexible film,
A dried thin layer of paste or a thin layer of fine paste dispersed therein is provided. However, since this paste layer does not have adhesiveness, the paste layer is wetted and adhered to the face, or adhered to the wet face after washing the face, or subjected to basic cosmetics. The skin was brought into close contact with the face to remove dirt from the skin surface. On the other hand,
The cosmetic tool disclosed in JP-A-60-111603 uses a pressure-sensitive adhesive having tackiness. However, in this case, cosmetics are mixed and applied only to the hydrogel-forming polymer layer, and the pressure-sensitive adhesive itself has no cosmetic effect and does not contain cosmetic components,
The cosmetic effect could not be expected at all from the pressure-sensitive adhesive.

In the first place, with such a sheet-like pack material, it has been very difficult to mix the cosmetic ingredient into an adhesive for attaching a skin sheet while maintaining the adhesiveness. That is, if a cosmetic component is added as much as necessary to exert a cosmetic effect, there may be a problem in maintaining the adhesiveness, and the cosmetic component conventionally used is contained in such an adhesive. The same effect is not always exerted when it is blended, and there are only limited cosmetic ingredients that can be mixed with the adhesive.

As described above, in the case of the conventional product or the conventional technology, there is no pack material which itself has adhesiveness and exhibits a cosmetic effect, and it has been difficult to realize the pack material.

[Object of the invention]

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sheet-shaped pack material that can obtain both an effect of removing dirt and a cosmetic effect with high efficiency. .

[Disclosure of the Invention]

In order to achieve the above object, the present invention has been selected from the group consisting of 20 to 94 parts by weight of a collagen hydrolyzate, 5 to 70 parts by weight of a water retention agent, and urea, acetic acid, citric acid and calcium chloride. The gist of the present invention is a sheet-like pack material in which a pack composition containing at least 1 to 30 parts by weight of a jellification inhibitor comprising at least one compound as a main component is formed in layers.

 Hereinafter, the present invention will be described in detail.

The collagen hydrolyzate constituting the pack agent layer is, as its name implies, a substance derived by hydrolyzing collagen, and is preferably, for example, gelatin. Such a collagen hydrolyzate is excellent in biocompatibility and water retention, and has a so-called cosmetic effect that moisturizes the skin.

The water retention agent works to moisturize the skin by retaining water, and also has the function of imparting plasticity to the collagen hydrolyzate by the water. Examples of such water retention agents include sugars such as sorbitol, glucose, and sugar; polyhydric alcohols such as glycerin, polyglycerin, ethylene glycol, polyethylene glycol, propylene glycol, and polypropylene glycol; and wetting agents such as sodium pyrrolidone carboxylate. And the like.

As the jellification inhibitor, at least one selected from the group consisting of urea, acetic acid, citric acid and calcium chloride
Seed compounds are used. Urea, acetic acid, and citric acid are weakly acidic organic acids, and are preferable because they do not irritate the skin. These jellification inhibitors have effects such as water retention and skin softening, and work as cosmetic ingredients. The jelly-forming inhibitor also has a function of preventing the collagen hydrolyzate from hydrogen-bonding in an aqueous solution at room temperature or at a low temperature to prevent gelation.

The collagen hydrolyzate, the water retention agent, and the anti-jellification agent exhibit adhesiveness only when these three components are combined, and have an effect of adhering to the skin to give appropriate tension and adsorbing and removing dirt on the skin surface. . If any of the above three members is missing, such an effect cannot be expected.

In selecting a specific combination of the three, it is necessary to select a combination that does not become unstable due to a reaction when the three are mixed.

The mixing ratio of each of the above components is as follows:
Water retention agent 5 to 94 parts by weight (hereinafter referred to as “parts”)
It is blended in the range of 70 parts and 1 to 30 parts of the jellification inhibitor. If the amount of the water retention agent is less than 5 parts or the amount of the anti-jellification agent is less than 1 part, the adhesive strength tends to be insufficient. If it exceeds the part, the stickiness will be extremely high and it will be sticky, and depending on the storage conditions of the pack material, the pack agent layer will not coagulate and break when peeling the release paper, There is a possibility that problems such as peeling of the layer may occur. When the amount of the collagen hydrolyzate is less than 20 parts, the cohesive force of the pack agent layer is reduced, and it becomes sticky again. When the amount exceeds 94 parts, the cohesive force increases, but the tackiness (tack) is increased. This is because there is a risk of lowering.

Therefore, each of the above components is appropriately adjusted in the mixing ratio within the above-described range, and the physical properties according to the purpose of use, for example,
It is preferable to control to have stickiness, surface tack, adhesive strength and the like.

In addition, when the compounding ratio of each of the above components is within the range of 55 to 95 parts of collagen hydrolyzate, 5 to 30 parts of water retention agent, and 1 to 15 parts of jellification inhibitor, it exhibits tackiness in a normal state. However, if it comes into contact with the skin and is warmed to about body temperature, or if the moisture content increases due to the moisture evaporating from the skin, it becomes possible to obtain a pack agent layer exhibiting adhesiveness.

Although the pack agent layer containing each component as described above is formed on the surface of the base sheet, or by forming a sheet using only each component itself, the sheet-like pack material of the present invention is constituted, The manufacturing method may be performed as follows, for example.

When forming a pack agent layer on the surface of a substrate, first, a substrate sheet is prepared. The material of the base sheet is not particularly limited in the present invention, but a thin and flexible porous polymer film having a thickness of about 0.01 to 2 mm, a nonwoven fabric, a woven fabric, paper, and the like are preferable in order to adhere the skin surface flexibly. .

Next, a pack agent layer composed of the above components is formed on the surface of the base material. The pack agent layer may be formed by applying a mixture of each of the above components to the surface of the base material and then drying the mixture to obtain an equilibrium moisture state.

In the case of forming a sheet using only each component itself, for example, a pack agent composition comprising the above component is applied to a plastic film or paper having releasability by a doctor blade, a roll coater, a knife coater or the like, and then dried. What is necessary is just to form by making it into an equilibrium moisture state.

At this time, other cosmetic ingredients, for example,
Flavors, pigments and the like may be added. The thickness of such a pack agent layer is not particularly limited in the present invention, but is preferably about 0.5 mm.

The surface of the pack agent layer formed as described above can be covered with a release sheet made of paper, cloth, or the like in order to prevent a decrease in the adhesiveness. However, in the above-mentioned pack agent layer that exhibits adhesiveness by being heated by body temperature or by increasing the water content due to moisture from the skin, even if it is not covered with a release sheet, there is no practical problem. .

As described above, in the sheet-shaped pack material of the present invention, as described above, the skin is moisturized,
Since the pack agent layer composed of each component having a cosmetic effect exhibits tackiness itself, it is possible to obtain both the effect of removing dirt and the cosmetic effect with high efficiency. Moreover, in the sheet-shaped pack material of the present invention, when the dirt is removed by peeling from the skin, even if the pack agent remains on the skin surface, it is a component that moisturizes the skin, so it is not necessary to wash it off. No, you can leave it as is. In addition, when it is desired to wash off, since these components are water-soluble, they can be easily washed off with water.

Next, examples of the present invention will be described together with comparative examples.

(Examples 1 to 9) As the components constituting the pack agent layer, the substances shown in Table 1 were mixed in the formulations shown in the table to prepare mixtures. In Table 1, "parts" represents parts by weight. The obtained mixture is applied to the surface of a foamed polybutadiene sheet (1.0 mm thick, Calsoft manufactured by Takiron Co., Ltd.) as a base sheet, and then dried to form a pack agent layer having a thickness of about 0.5 mm. A pack material was obtained.

Gelatin A used in the examples had a viscosity of 44 mP and a jelly strength of 279.
Bloom (according to JIS K 603; the same applies hereinafter) alkali-treated gelatin and gelatin B are obtained by polymerizing the above gelatin A to such an extent that the gelatin A is not insolubilized by heating in the air. It is a water-soluble gelatin which does not gel even at 5 ° C when made into an aqueous solution having a molecular weight of 10,000% by weight.

In addition, although Example 4 did not have tackiness at the time of formation, when placed on the skin, it exhibited tackiness by its humidity and heat, and an effect of removing dirt could be obtained.

(Example 10) A mold having a predetermined shape made of a PP sheet having a thickness of 1 mm was attached to the release paper surface, and a pack agent composition having the components shown in Table 1 was poured into the mold. The portion protruding from the frame was scraped off with a glass rod and formed into a sheet. The molded product was dried in a thermostat at 50 ° C. and 20% RH for 48 hours, allowed to stand at room temperature for 16 hours, and then peeled off from the release paper to obtain a 0.52 mm thick sheet pack.

(Evaluation Test) A sensory test was conducted by five adult women on two items, that is, skin tension at the time of peeling and skin moistness after packing. The tension of the skin at the time of the peeling was determined by observing the tackiness of the sample and the cleaning effect associated therewith, and the moist feeling of the skin after packing was performed to observe the cosmetic effect of the sample. .

For each of the above items, the total score was determined for each item, assuming that 2 points were “Yes”, 1 point was “Slightly present”, and 0 point was “No”. The perfect score is 10
Is a point. The results are shown in the lower column of Table 1.

[Effect of the Invention] The sheet-shaped pack material of the present invention is as described above,
A jellification inhibitor 1 comprising 20 to 94 parts by weight of a collagen hydrolyzate, 5 to 70 parts by weight of a water retention agent, and at least one compound selected from the group consisting of urea, acetic acid, citric acid and calcium chloride. And at least 30 parts by weight as a main component, and since the pack agent layer composed of each component having a cosmetic effect itself exhibits tackiness, it removes dirt or the like. Both the effect and the cosmetic effect can be obtained with high efficiency.

Claims (2)

(57) [Claims] 1. A composition comprising 20 to 94 parts by weight of a collagen hydrolyzate, 5 to 70 parts by weight of a water retention agent, and at least one compound selected from the group consisting of urea, acetic acid, citric acid and calcium chloride. A sheet-like pack material comprising a pack composition containing at least 1 to 30 parts by weight of a jellification inhibitor as a main component. 2. The sheet-shaped pack material according to claim 1, wherein the layer of the pack composition is lined with a base sheet.