KR20030093615A - Hydrophilic gel sheet - Google Patents

Abstract

PURPOSE: A hydrophilic gel sheet is provided which has higher adhesion to the skin and is thus used as adhesion sheets for cosmetics, medical devices, cooling devices, cataplasma and transdermal absorption preparations. CONSTITUTION: In a hydrophilic gel sheet, a hydrophilic gel layer(a skin side gel layer) having a high adhesion force is laminated on one side of a porous core material(11), a hydrophilic or lipophilic gel layer(a non-skin side gel layer) having a low adhesion force is laminated on another side thereof, wherein each gel layer(12, 13) is covered with separating material(14).

Description

Hydrophilic Gel Sheet {Hydrophilic Gel Sheet}

The present invention relates to a hydrophilic gel sheet used as a sheet for skin patching such as medicines and hygiene products such as cosmetics, medical equipment, cooling equipment, pape and percutaneous absorption preparations.

The currently available sheet for skin application includes water-sealed nonwoven fabrics and the like in water-sealed packaging (conventional example 1), and the hydrophilic gel base material 22 contains various active ingredients as necessary and applied to the nonwoven fabrics 21 and the like. One form (conventional example 2) and the form which apply | coated the adhesive liquid, such as glycerin, to the surface as needed to a non-adhesive hydrophilic gel sheet (conventional example 3) etc. are mentioned. (Prior example 2 is shown in Fig. 2. Reference numeral 23 is a peeling material.)

However, the conventional example 1 is relatively good in effect, but is not well fixed to the skin and there is no sense of unity with the skin when used, the use is bad, while the conventional example 2 is also good effect and well fixed to the skin, but when used, the unity with the skin is poor. In addition, in the conventional example 3, the sense of unity with the skin is improved to some extent when compared with the conventional 2, but adhesiveness with the skin is difficult to be maintained by the adhesive liquid such as glycerin, and the liquid is absorbed into the skin with time. The adhesion is not maintained for the reason.

As described above, at present, there is no sheet for skin affixation, which is excellent in effect and is well fixed to the skin and has a sense of unity with the skin.

The present invention has excellent effects, is well fixed to the skin, and has a sense of unity with the skin when used, and has a good feeling of use, and is a hydrophilic gel sheet used in medicines and hygiene products such as cosmetics, medical equipment, cooling equipment, pap and transdermal absorbents, To provide.

1 is a cross-sectional view of a hydrophilic gel sheet of the present invention.

2 is a cross-sectional view of a conventional hydrophilic gel sheet.

Explanation of symbols on the main parts of the drawings

11: porous core 12: skin side gel layer

12: non-skin side gel layer 14, 23: release material

21: nonwoven fabric 22: gel layer

In order to achieve the above object, the inventor of the present invention examines the structure of the prior art example 2, which is effective and is well fixed to the skin, but inferior to the skin when used. As a result, the non-woven fabric 21 is judged to be inferior to the skin. And the form used in the conventional example 2, that is, the non-woven fabric to reduce the elasticity is not to be used. However, if there is no nonwoven fabric (i.e., the sheet is formed only by the gel layer), the surface on the opposite side of the skin also has a strong adhesive force, and the elasticity is good but the shape is not maintained well, making it difficult to handle during the sticking operation.

Therefore, in order to keep the sheet in a minimal form, the porous core was placed between the layers inside the gel, and the gel layer on the skin side was covered with a gel layer having a low adhesive strength so as not to be an obstacle during the sticking operation. In other words, the composition of the two gel layers are different, so that the skin side gel layer has high adhesive strength, and the non-skin side gel layer has low adhesive strength.

Two countermeasures, namely, the adhesive force of the non-skin-adhesive side gel layer are such that they do not interfere with the patching operation, and the porous core is interposed between layers within the gel so that the shape is maintained, that is, the adhesive force is applied to one side of the porous core. The high hydrophilic gel layer is laminated, and on the other side, the hydrophilic or lipophilic gel layer with low adhesion is fixed to the skin, and it is well fixed to the skin. And hydrophilic gel sheets for use in medicines and hygiene products such as transdermal absorbents and the like.

Each gel layer is covered with a release material to prevent evaporation and contamination of the moisture in the gel layer until use.

Referring to FIG. 1, the hydrophilic gel sheet of the present invention has a skin-side gel layer (or non-skin-side gel layer) 12 laminated on one surface of the porous core 11 and the non-skin side on the other side. The gel layer (or skin side gel layer) 13 is laminated, and each gel layer 12 and 13 has a structure that is covered with a release material 14, depending on the purpose of use for the skin side hydrophilic gel layer (drug or cosmetic component) It contains and attaches to skin.

As for the adhesive force of the gel layer laminated | stacked on both surfaces of a porous sheet, it is preferable that the skin side gel layer is 13 or more ball-tachches, and the non-skin-side gel layer is 10 or less ball-tachches. (Measurement method for ball touch is described in the examples described later.)

Porous core material is a hydrophilic material such as cotton, rayon, pulp, cellulose, or non-hydrophilic material such as PE, PP, PET. It is a woven fabric, nonwoven fabric, or net-shaped fabric. There is no

Hydrophilic gel components are also not limited as long as they are generally acceptable. For example, synthetic, semisynthetic hydrophilic polymer compounds such as polyacrylic acid and polyacrylate, cellulose derivatives, PVA, PVP, methylvinyl ester maleic anhydride copolymers, and natural thickeners (gel forming agents) such as gelatin, alginate, and polysaccharides. And a curing agent such as a polyvalent metal salt such as an aluminum compound, and a filler such as kaolin and titanium oxide.

As the release material, a release film and a release paper coated with a synthetic resin are used.

The configuration of the present invention will become clearer from the embodiments described below, but the rights are not limited to the embodiments.

<Example>

A hydrophilic porous core material of 20g / m3 area weight and 0.3mm thickness woven from cupra is used as the porous core material, and the skin side gel layer is coated on one side, and the non-skin side gel layer is coated on the other side by 900g / m2 and 500g / m2, respectively. Release paper was laminated on both surfaces.

The components of the skin-side gel layer and the non-skin-side gel layer were as shown in the following [Table 1], and the sensory test and the ball tack value were measured.

division Skin side gel layer (per 100 g) Non-skin side gel layer (per 100 g) Polyacrylic acid 2.0 2.0 Sodium polyacrylate 10.0 4.0 Magnesium metasilicate 0.4 0.6 glycerin 20 20.0 water 67.6 73.4

1. Sensory test

Five monitors were prepared with 3 cm x 6 cm specimens and skin gels were attached to the left cheek and 3 cm x 6 cm non-skin gel layers were attached to the right cheek. However, the non-skin-side gel layer was prepared from the beginning so as not to be sticky, and did not adhere to the cheeks or the fingers for handling it. On the other hand, the skin-side gel layer adhered well to all five patients, and as a result of measuring the time, it did not peel off until 10 hours had elapsed.

2. Measurement of ball tack value

The ball contact apparatus used the electric bulb apparatus of JISZ02371980, and set the inclination-angle to 20 degrees. The material prescribed | regulated to JIS Z 4805 was used, and 32 times the numerical value measured by 1/16 of JIS B 1501 was made into the ball number.

The test piece was placed on the inclined plate of the electric bulb with the surface to be measured facing up, and the maximum ball number that completely stopped (not moving for more than 5 seconds) when the ball was rolled was used as the ball tact of the test piece.

As a result, the adhesive force of the skin side gel layer was measured by ball-tact 23, and the adhesive force of the non-skin side gel layer was measured by ball-tach 5, respectively.

According to the present invention, a hydrophilic gel sheet having a sense of unity with the skin as well as being well fixed to the skin and having good elasticity is provided. In addition, the presence of two hydrophilic gel layers contains more water.

Claims (3)

A hydrophilic gel layer (skin side gel layer) having high adhesion is laminated on one side of the porous core material, and a hydrophilic or lipophilic gel layer (non-skin side gel layer) having low adhesive strength is laminated on the other side, and each gel layer is covered with a release material. Hydrophilic gel sheet, characterized in that. The hydrophilic gel sheet according to claim 1, wherein the hydrophilic gel layer having high adhesion has a balltack of 13 or more, and the hydrophilic or lipophilic gel layer having low adhesion has a adhesion of 10 or less. The hydrophilic gel sheet according to claim 1, wherein the porous core material is a loose woven fabric, a nonwoven fabric, or a net-shaped fabric.