Adhesive pad and its production

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to a sticking pad for sticking to the epidermis of a human body and a method for manufacturing the sticking pad.

【0002】

[Conventional technology]

Conventionally, as a sticking pad of this kind, for example, a bust top cover is known, and it is common to attach an adhesive member to the inner peripheral edge of the cup-shaped body (for example, Jitsukaisho 63-143508). Gazette, etc.).

【0003】

[Problems to be Solved by the Invention]

However, since the conventional adhesive pad uses an ordinary adhesive for adhesive plasters for the adhesive member, it is easy to get a rash, and once it is used and removed, the adhesive force of the adhesive member is weakened or almost eliminated. , It was uneconomical because it could not be reused.

【0004】

Therefore, an object of the present invention is to provide a sticking pad which is hard to get a rash, can maintain an adhesive force for a certain period of time even when washed with water, and can be used repeatedly, and a method for manufacturing the same.

【0005】

[Means for solving problems]

The above object of the present invention is a sticking pad to be used by sticking to a human body, in which a pad body is made of silicone rubber and a silicone gel adhesive layer is integrally laminated on the sticking surface of the pad body. Achieved by a sticking pad characterized by.

【0006】

Further, the above object according to the present invention is to form an unvulcanized silicone rubber into a predetermined shape, heat it to semi-vulcanize it, and then form an unvulcanized silicone gel in a layer on the surface to which the silicone rubber is attached. , The silicone gel is vulcanized and cured together with the silicone rubber, which is achieved by a method for producing a sticking pad.

【0007】

BEST MODE FOR CARRYING OUT THE INVENTION [Embodiments of the Invention]

An embodiment of the sticking pad according to the present invention will be described below with reference to the drawings.

【0008】

FIG. 1 is a perspective view showing an embodiment of the sticking pad according to the present invention, and FIG. 2 is an enlarged cross-sectional view thereof. In the illustrated example, the sticking pad exemplifies a cup-shaped sticking pad to be stuck on the bust top.

【0009】

The sticking pad 1 has a silicone gel adhesive layer 3 integrally laminated on the concave side of a cup-shaped main body 2 made of silicone rubber. In this type of sticking pad 1, the thickness of the main body 2 is preferably 0.2 to 0.6 mm, and the thickness of the silicone gel adhesive layer 3 is preferably 1.5 to 2.5 mm in order to eliminate bulkiness and discomfort when mounted. When the main body 2 is used as a bust top cover, the size is such that the bust top is hidden, and the diameter is preferably 35 to 65 mm, more preferably 45 to 55 mm.

【0010】

If the silicone rubber pad body 2 and the silicone gel adhesive layer 3 are laminated only by the adhesive strength of the silicone gel adhesive layer 3, the silicone gel adhesive layer 3 is easily peeled off and is not suitable for repeated use.

【0011】

Therefore, by manufacturing by the method described below, it is possible to provide a practical sticking pad in which the silicone gel adhesive layer 3 does not easily peel off. In the following embodiment, a method of manufacturing the sticking pad for the bust top cover will be described with reference to FIG.

【0012】

First, a predetermined amount of unvulcanized silicone rubber 11 is supplied to the recess of the lower mold 10 having a cup-shaped recess (FIG. 3 (a)). The silicone rubber is not particularly limited, but various known high-temperature vulcanized silicone rubbers can be used. As this type of silicone rubber, for example, one commercially available under the trade name SE1187 manufactured by Toray Dow Corning Silicone Co., Ltd. can be used. This type of silicone rubber does not have adhesiveness after curing. In this example, a cup-shaped mold is used, but other molds having various shapes such as a knee pad, an elbow pad, and the like can be used depending on the use of the sticking pad.

【0013】

Next, the upper mold 12 is pressed from above the unvulcanized silicone rubber 11 supplied to the lower mold 10, pressurized, and heated to mold the silicone rubber 11 into a predetermined cup shape and semi-vulcanized (semi-vulcanization). Primary curing) (Fig. 3 (b)). The heating temperature and heating time of the silicone rubber 11 vary depending on the type of the silicone rubber, but are generally about 10 to 20 minutes at 160 to 180 ° C. Since the silicone rubber 11 has a certain shape-retaining property in a semi-vulcanized state, it can be prevented from being torn or the like when it is molded into a thin sheet as described above. In the upper mold 12 and the lower mold 10, the radius of curvature of the uneven portion of both molds is set so that a predetermined gap is formed between the upper mold 12 and the lower mold 10 when the two molds are fitted together. ..

【0014】

In this state, the upper mold 12 is raised, and a predetermined amount of unvulcanized silicone gel 13 is supplied on the semi-vulcanized silicone rubber 11 in a cup shape by a dispenser or the like (FIG. 3 (c)). The silicone gel 13 has a degree of needle insertion after curing of 40 to 100, preferably 50 to 60 (measured by the JIS K2220 test method), and is not particularly limited as long as it is a silicone gel material having a predetermined adhesiveness. , Known room temperature curing type or heat curing type silicone gel can be used. Examples of this type of silicone gel include SE1886A / B manufactured by Toray Dow Corning Silicone Co., Ltd., K-104Gel or KE1052 (AB) manufactured by Shin-Etsu Chemical Co., Ltd., and Toshiba Silicone Co., Ltd. Commercially available products such as YE5818 can be used. A release agent is applied to the upper mold 12 in advance so that the upper mold 12 can be easily peeled from the silicone rubber 11.

【0015】

Then, the second upper mold 12', which has a smaller radius of curvature than the upper mold 12, is lowered to press the unvulked silicone gel 13 onto the semi-vultured silicone rubber 11, and the silicone gel 13 is added in layers. It was pressure-molded, heated again, and secondarily cured until the semi-sulfurized silicone rubber 11 was optimally cured to form the silicone rubber pad body, and the silicone gel 13 had a predetermined needle insertion degree and adhesiveness. A silicone gel adhesive layer is formed (Fig. 3 (d)). The conditions for secondary curing differ depending on the type of silicone rubber and silicone gel, but are generally about 20 to 30 minutes at 150 to 170 ° C. After that, it is removed from the lower mold 10 to obtain a sticking pad.

【0016】

In the adhesive pad thus obtained, the silicone rubber pad body and the silicone gel adhesive layer are integrally laminated to the extent that the boundary between the two cannot be recognized, and even if water washing is repeated 50 times, the adhesive strength is maintained for a certain period of time. Experimental results were obtained to maintain. In addition, silicone is generally gentle on the skin and less likely to cause a rash, and is therefore suitable as a sticking pad to be attached to the skin.

【0017】

Further, according to the above manufacturing method, since one lower mold 10 can be shared between the molding of silicone rubber and the molding of silicone gel, the manufacturing cost can be suppressed and the manufacturing time can be shortened by reducing the manufacturing man-hours. Can be planned.

【0018】

[Effect of the invention]

As is clear from the above description, the sticking pad according to the present invention is gentle on the skin and can be washed with water and used repeatedly. Further, according to the method for manufacturing a sticking pad according to the present invention, a sticking pad in which a silicone rubber layer and a silicone gel layer are integrally laminated can be manufactured at low cost.

[Simple explanation of drawings]

[Figure 1]

It is a perspective view which shows one Embodiment of the sticking pad which concerns on this invention.

[Figure 2]

It is an enlarged cross-sectional view of the sticking pad of FIG.

[Fig. 3]

It is a process diagram which shows the manufacturing process of the sticking pad of FIG.

[Explanation of symbols]

1 Sticking pad 2 Pad body 3 Silicone gel adhesive layer 10 Lower mold 11 Silicone rubber 12,12 Upper mold 13 Silicone gel